Solar evaporation urea recycling system

Abstract

The solar evaporation urea recycling system can be integrated with an ecological building, and the problems of effective desalination, efficient evaporation and condensation and low-energy-consumption operation of a urea solid fertilizer are solved; comprising a new energy power supply system; the device is characterized by comprising a thin felt containing urine evaporation residual solids, a solvent cabin, a dissolving cabin, a solar evaporation condensation cabin, a condensation solvent collecting cabin, a liquid conveying and condensation return pipeline and an evaporation control system, an exhaust irrigation water tank and a planting cabinet are arranged; according to the solar evaporation urea recycling system, urea can be recycled from urine evaporation residual solids, excessive inorganic salt can be removed, effective desalted solid fertilizer which can be applied for a long time is provided for a green planting device, chemical substance loss and environmental pollution are avoided, efficient evaporation and condensation and low-energy-consumption operation can be achieved through solar energy, and the solar evaporation urea recycling system is suitable for large-scale popularization and application. Besides, off-network zero energy consumption can be achieved through green electric driving, and the comprehensive benefits of urine waste treatment, resource recycling, ecological landscape and agricultural planting are achieved.

Description

Technical Field

[0001] This invention relates to the field of urine treatment technology, and in particular to a system for treating and utilizing the residual solids after urine evaporation in ecological buildings. Background Technology

[0002] Ecological buildings, aiming for energy conservation, emission reduction, and environmental friendliness, often employ energy-saving, environmentally friendly, resource-recycling, and new energy technologies. Localized waste treatment technologies are increasingly used in ecological buildings, such as the ecological technology of recycling urine, fermenting and diluting it, and then using it as organic fertilizer for building-integrated green walls. This technology treats urine waste while creating an ecological landscape and generating planting revenue. Urine treatment systems used in ecological buildings are not suitable for high-energy-consuming technologies, such as those involving electrolysis, vacuum or negative pressure evaporation, pressurized reverse osmosis purification, or high-temperature pyrolysis evaporation. Currently, there are two main categories of relatively low-energy-consumption urine treatment technologies: one is the technology of microbial degradation of feces and urine to ferment and produce organic fertilizer; the other is the technology of solar evaporation of urine to concentrate it into liquid fertilizer, or the technology of completely evaporating urine to obtain residual solids for use as solid fertilizer. Humans excrete a total of [amount missing] urine daily. When the volume of urine is significantly larger than the total volume of feces, generally about 10 times, and in special cases up to about 20 times, the aerobic microorganisms in the microbial degradation device that does not separate feces and urine are easily submerged and lack oxygen by the excess urine, which seriously affects the aerobic fermentation and degradation efficiency of feces and urine. Therefore, when the volume of urine is significantly larger than the volume of feces, the technology of separating and treating feces and urine separately is better. Under normal circumstances, about 95% of urine is liquid water, about 50% of the solid matter is urea, and the remaining solid matter is mainly inorganic salts, mainly sodium chloride, and trace amounts of organic matter, mainly creatinine and uric acid. Affected by diet, drinking water and individual metabolic differences, the proportion of various components in urine varies greatly, but water, urea, and sodium chloride are always the main components of normal urine. Removing excess water from urine is necessary to reduce the storage volume of urine fertilizer. In this case, the treatment technology of solar evaporation of urine is more effective and energy-saving.

[0003] Existing patents concerning solar-powered urine evaporation, such as application number 2019206986262 "A Urine Harmless Treatment and Recycling Device" and application number 2021107870335 "A Treatment System for Source Separation of Urine and Fecal Resources Using Solar Energy," still have the following shortcomings: In patent 2019206986262, the heat transferred to the evaporating liquid surface after the light-transmitting heat-absorbing glass absorbs solar radiation is limited, resulting in reduced heat absorption by the evaporating plate. Furthermore, the residual solids precipitated as urine evaporates cover the evaporating plate, further reducing its heat absorption and leading to low evaporation efficiency. Additionally, the resulting concentrated urine contains excessive amounts of inorganic salts such as sodium chloride, which, when used as liquid fertilizer over a long period, can lead to salt accumulation and soil compaction and salinization. Patent 2021107870... In patent 335, the photothermal conversion material layers, thin water-containing layer, and heat insulation layer arranged from top to bottom are all loose, porous, and water-absorbing material layers. After urine evaporates, salt crystals remain in the urine, reflecting more sunlight and reducing surface heat absorption, thus lowering evaporation efficiency. Meanwhile, the transparent condenser plate, evaporation chamber, and collection chamber described in patent 2021107870335 do not have performance optimizations for the evaporation and condensation physical process, resulting in low evaporation and condensation efficiency. Furthermore, the concentrated urine after evaporation does not remove excess inorganic salts such as sodium chloride. Long-term use as liquid fertilizer can lead to salt accumulation, causing soil compaction and salinization, which is detrimental to plant growth. Currently, there is no suitable, miniaturized, low-energy-consumption urine product treatment system that can be integrated with ecological buildings and provide desalinated organic fertilizer for building-integrated greening planting devices. Summary of the Invention

[0004] To address the problem of removing excess inorganic salts and recovering urea from the residual solids of urine evaporation, providing effective desalinated solid fertilizer for integrated eco-building greening and planting devices, and achieving efficient evaporation and condensation and low-energy operation using solar energy, this invention proposes a solar-powered urea evaporation and recovery system. The technical objective of this system is to provide a urine product treatment and utilization system that removes excess inorganic salts and recovers urea from the residual solids of urine evaporation, provides effective desalinated solid fertilizer for integrated eco-building greening and planting devices, and achieves efficient evaporation and condensation and low-energy operation using solar energy.

[0005] To achieve the above objectives, this invention proposes a solar-powered urea evaporation and recycling system, comprising: a new energy power supply system; characterized by: a thin felt containing residual solids from urine evaporation, a solvent chamber, a dissolving chamber, a solar evaporation condensation chamber, a condensate collection chamber, a liquid conveying and condensate return pipeline, and an evaporation control system; and also including an exhaust irrigation tank and a planting cabinet; the new energy power supply system provides green electrical energy for the solar-powered urea evaporation and recycling system, including: a photovoltaic power generation system and / or a wind power generation system, and an energy storage system; the thin felt containing residual solids from urine evaporation is a thin layer of fibrous or sponge-like porous absorbent material, which absorbs urine and is then evaporated to lose moisture, and the substances dissolved in the urine... The precipitate forms a thin felt of residual solids adhering to it; approximately 50% of the residual solids from urine evaporation are urea, the remainder mainly consists of inorganic salts, primarily sodium chloride, and trace amounts of organic matter, primarily creatinine and uric acid; the solvent chamber is a storage chamber for solvents containing solvents whose solubility for urea at the same temperature is significantly greater than their solubility for the inorganic salts in the residual solids from urine evaporation; the solvent chamber includes: a thermal insulation enclosure structure, a solvent leak-proof and corrosion-resistant lining, a condensate reflux pipe interface, a solvent chamber pump, and solvent; the thermal insulation enclosure structure includes: an outer enclosure structure and a solvent chamber top plate; furthermore, the outer enclosure structure of the thermal insulation enclosure structure has a solvent chamber phase change storage... The thermal material layer; the dissolving chamber is equipped with a dissolving device and a controllable thermal environment, enabling the solvent to efficiently dissolve urea in the thin felt containing residual solids from urine evaporation under normal pressure, generating a urea solution. The thin felt containing residual solids from urine evaporation is placed inside the dissolving chamber during operation. The dissolving chamber includes: a thermal insulation enclosure structure, a dissolving tank system, a dissolving chamber pump, and an airtight opening. The thermal insulation enclosure structure includes: an outer enclosure structure and a dissolving chamber floor plate. The dissolving tank system includes: a dissolving tank, a urea solution, a thin felt support, a dissolving tank heating device, a liquid temperature sensor, and a liquid level sensor. The solar evaporation and condensation chamber utilizes solar energy... The solar evaporation condensation chamber is a chamber capable of being heated to evaporate the solvent vapor from the urea solution and precipitate urea, and to collect the solvent vapor as a liquid solvent. The solar evaporation condensation chamber includes: an insulated enclosure structure, a transparent condensation structure, a liquid collection tank, a solar heat-absorbing evaporation plate, a solvent vapor concentration sensor, an exhaust pipe, a negative pressure inlet valve, and an insulated sunshade top cover with an opening and closing mechanism. The insulated enclosure structure includes: an outer enclosure structure and a bottom plate. The transparent condensation structure is a structure consisting of a transparent material layer that allows solar radiation to pass through and condenses the solvent vapor, along with its supporting structure and accessories.The liquid collection tank of the evaporation condensation chamber is located inside the solar evaporation condensation chamber and has a primary condensation return pipe interface at the bottom. The shading panel on the shaded side of the evaporation condensation chamber serves as a shade for the liquid collection tank. The solar heat-absorbing evaporation plate has a heat-absorbing and heat-conducting grid and an evaporation plate temperature sensor. The evaporation condensation chamber exhaust pipe includes a gas collection pipe, an exhaust valve, and an evaporation condensation chamber exhaust pipe. The evaporation condensation chamber insulation and shading top cover and opening / closing mechanism include a top cover and a top cover opening / closing mechanism. Furthermore, the transparent condensation structure adopts a folded plate or folded film transparent condensation structure, including a folded plate or folded film support, a transparent plastic sheet or film, a drip line, a transparent guide channel, and transparent condensation structure fasteners. Further, the folded plate... The transparent condensation structure also features transparent heat transfer ribs; furthermore, the inner surface of the insulated and sun-shading top cover and opening / closing mechanism of the evaporation condensation chamber has an inner reflective surface, and the sun-facing surface inside the solar evaporation condensation chamber has a sun-facing reflective surface; the condensate collection chamber is a chamber used to collect the condensed solvent generated in the solar evaporation condensation chamber; the condensate collection chamber includes: an insulated and heat-insulating enclosure structure, a secondary condensate return pipe interface, and an airtight opening; the insulated and heat-insulating enclosure structure includes: an outer enclosure structure, a bottom plate, and an inter-chamber insulated and heat-insulating plate; the liquid transport and condensate return pipeline is used to transport the solvent to the dissolving... The system includes a urea storage chamber, a pipeline for conveying the urea solution to the solar evaporation and condensation chamber, and a pipeline for returning the condensed solvent to the solvent chamber. The liquid conveying and condensation return pipeline includes: a primary conveying pipeline, a secondary conveying pipeline, a primary condensation return pipeline, and a secondary condensation return pipeline. The outlet of the primary conveying pipeline is a liquid replenishment port for the dissolving tank. The outlet of the secondary conveying pipeline is a liquid replenishment port for the evaporation pan. The outlet of the primary condensation return pipeline has a primary pipeline outlet shut-off valve. The outlet of the secondary condensation return pipeline has a secondary pipeline outlet shut-off valve. The evaporation control system is the control system for the operation of the solar evaporation urea recovery and utilization system. The exhaust irrigation water tank is used for storing water and for dissolving the solid urea generated in the solar evaporation and condensation chamber. The system uses fertilizer and ammonia to generate irrigation water containing soluble fertilizer. The vented irrigation tank includes: a thermally insulated enclosure structure, a leak-proof and corrosion-resistant lining, an evaporative condensation chamber vent pipe interface and a submerged vent pipe, a top vent pipe and filter, a drip irrigation pipe connector and valve, a water and fertilizer inlet, and irrigation water. The thermally insulated enclosure structure includes: an outer enclosure structure and a bottom plate. The planting cabinet is a greening device for vertical planting within a limited space. The planting cabinet includes: a thermally insulated enclosure structure, a transparent thermally insulated enclosure structure, an adjustable external shading unit, planting troughs and planting media, and a drip irrigation system. The thermally insulated enclosure structure includes: an outer enclosure structure and a top plate.The planting cabinet has an openable fan on its transparent, insulated enclosure.

[0006] In the operation of the solar-powered urea evaporation and recovery system, the solvent is fed into the dissolving chamber. Under normal pressure and temperature conditions, the urea in the thin felt containing the residual solids from urea evaporation is dissolved, leaving behind inorganic salts to form a urea solution containing the solvent and urea. The urea solution is then fed into the solar-powered evaporation condensation chamber for evaporation, causing the solvent to turn into solvent vapor and separate from the urea in the urea solution. The vapor is then condensed into liquid solvent and sent to the condensate solvent collection chamber, and then returned to the solvent chamber for recycling. The urea in the urea solution fed into the solar-powered evaporation condensation chamber precipitates as effectively desalted urea solid fertilizer. During operation, the solvent, the urea solution, and the condensed solvent are... The liquid transport and condensation return pipeline flows and is controlled by the evaporation control system to achieve low-energy operation of the solar evaporation urea recovery system. Driven entirely by green electricity from a new energy power supply system, the solvent is recycled to gradually recover urea from the thin felt containing residual solids from urea evaporation in the dissolving chamber into effectively desalinated urea solid fertilizer in the solar evaporation condensation chamber. After collection, the effectively desalinated urea solid fertilizer is added to the exhaust irrigation tank for complete dissolution. Ammonia gas generated in the solar evaporation condensation chamber is also sent to the exhaust irrigation tank for complete absorption, making the water in the exhaust irrigation tank irrigation water containing effectively desalinated soluble fertilizer, which can be applied to the plants in the planting cabinet for a long period.

[0007] The solvent is an organic solvent with a boiling point above 50°C and below 100°C at normal pressure, which readily or can dissolve urea under the same temperature conditions, but is slightly soluble, or difficult to dissolve or does not dissolve inorganic salts in the residual solids of urine evaporation; furthermore, the solvent is a high-concentration ethanol solution or anhydrous ethanol with a concentration of not less than 95%, and does not exceed the methanol content limit specified for pharmaceutical / food grade ethanol.

[0008] The thin felt containing residual solids from urine evaporation, solvent chamber, dissolving chamber, solar evaporation and condensation chamber, condensate collection chamber, liquid delivery and condensate return pipeline, and evaporation control system are combined into an integrated urea recovery system module, employing a combined upper, middle, and lower chamber layout. The solvent chamber is located at the lower part of the urea recovery system module; the solar evaporation and condensation chamber is located at the upper part of the urea recovery system module and faces the sun, allowing it to receive solar radiation; the condensate collection chamber is located in the middle of the urea recovery system module and is connected to the upper part of the condensate collection chamber via the primary condensate return pipeline. The solar evaporation and condensation chamber is connected to the solvent chamber located below the condensate collection chamber via the secondary condensate return pipeline; the dissolving chamber is located in the middle of the urea recovery system module, connected to the solvent chamber located below the dissolving chamber via the primary delivery pipeline, and connected to the solar evaporation and condensation chamber located above the dissolving chamber via the secondary delivery pipeline; the bottom plate of the dissolving chamber and the top plate of the solvent chamber are combined, and the bottom plate of the condensate collection chamber and the top plate of the solvent chamber are also combined; the top of the dissolving chamber has an airtight opening, and the top of the condensate collection chamber has a condensate collection... The solar evaporation and condensation chamber is a movable part of the urea recovery system module. The bottom plate of the evaporation and condensation chamber can be moved away from the top of the dissolution chamber and the condensate collection chamber by translation and / or rotation, exposing and opening both the airtight openings of the dissolution chamber and the condensate collection chamber. The bottom plate can also be moved back to its original position, pressing against the tops of the dissolution chamber and the condensate collection chamber, thus closing and maintaining an airtight seal for both openings. There is a connection between the condensate collection chamber and the dissolution chamber. The compartment is insulated with heat-insulating panels; the exhaust irrigation water tank and the planting cabinet are combined into an integrated greening and planting module; in the greening and planting module, the exhaust irrigation water tank is on top and the planting cabinet is below, and the bottom plate of the exhaust irrigation water tank and the top plate of the planting cabinet are integrated; the greening and planting module is a utilization system for the output products of the urea recovery system module, integrating waste treatment, ecological landscape and agricultural planting functions; furthermore, the greening and planting module and the urea recovery system module are combined into a modular solar evaporation urea recovery and utilization system, which is integrated with the ecological building facade and / or roof.

[0009] The outer enclosure of the solvent chamber thermal insulation structure is an enclosure with an opaque thermal insulation material layer; the top plate of the solvent chamber also has an opaque thermal insulation material layer; furthermore, the outer enclosure of the solvent chamber thermal insulation structure has a solvent chamber phase change heat storage material layer close to the inner side of the chamber; the solvent anti-seepage and corrosion-resistant lining is a stainless steel or organic polymer material lining that can withstand the corrosion of the solvent; the condensate reflux pipe interface is used to airtightly connect the secondary condensate reflux pipeline, so that the solvent flows into the solvent chamber without the solvent vapor overflowing; the solvent chamber pump is located in the solvent chamber and connected to the primary delivery pipeline, providing driving force for the solvent to enter the dissolution chamber from the solvent chamber through the primary delivery pipeline.

[0010] The outer enclosure structure of the dissolving chamber's thermal insulation structure is an enclosure structure with an opaque thermal insulation material layer; the dissolving tank system is a systematic dissolving device located inside the dissolving chamber, used to contain the solvent and the thin felt containing the residual solids from urine evaporation, keeping the thin felt containing the residual solids from urine evaporation in a wetted state to generate urea solution, maintaining a normal pressure thermal environment suitable for the efficient dissolution of urea by the solvent, and controlling the input of the solvent from the solvent chamber and the output of the urea solution to the solar evaporation and condensation chamber; the dissolving tank is a flat-bottomed liquid storage tank-shaped container located inside the dissolving chamber, used to contain the solvent and the thin felt containing the residual solids from urine evaporation; the dissolving tank has a thin felt support for supporting and fixing the spread-out urine-containing liquid. A thin felt for evaporating residual solids; the electrothermal device in the dissolving tank is used to heat the urea solution stored in the dissolving tank; the liquid temperature sensor in the tank is used to collect the temperature signal of the urea solution in the dissolving tank; the electrothermal device in the dissolving tank and the liquid temperature sensor in the tank cooperate to maintain the solvent in the dissolving tank within a temperature range that efficiently dissolves urea and reduces evaporation loss under the control of the evaporation control system; the liquid level sensor in the tank is used to collect the signal of the amount of urea solution in the dissolving tank; the dissolving chamber pump is connected to the secondary delivery pipeline to provide driving force for the urea solution in the dissolving tank to be input into the solar evaporation and condensation chamber through the secondary delivery pipeline; the airtight opening of the dissolving chamber is an opening with an airtight sealing strip at the top of the dissolving chamber.

[0011] The outer enclosure structure of the evaporative condensation chamber insulation and heat insulation structure is an enclosure structure with an opaque insulation and heat insulation material layer; the bottom plate of the evaporative condensation chamber is a bottom plate enclosure structure with an opaque insulation and heat insulation material layer, which is interconnected with the outer enclosure structure of the evaporative condensation chamber insulation and heat insulation structure and the transparent condensation structure, together forming the solar evaporative condensation chamber that prevents vapor penetration.

[0012] The transparent condensation structure is a structure located on the sun-facing side of the top of the solar evaporation condensation chamber, consisting of an airtight transparent material layer that allows solar radiation to pass through and has good heat transfer, along with its supporting structure and accessories. The transparent condensation structure has a condensation interface for the solvent vapor, which is the inner surface of the material layer in the solar evaporation condensation chamber where the solvent vapor and the outside air are in contact simultaneously. Furthermore, the transparent condensation structure adopts a folded plate or folded film transparent condensation structure, including: a folded plate or folded film support, a transparent plastic sheet or film, a drip line, a transparent guide channel, and transparent condensation structure fasteners.

[0013] The folded plate or folded membrane transparent condensation structure is an airtight, transparent, thin-walled space enclosure structure formed by the intersection or bending of multiple narrow, transparent plastic sheets or films, with multiple ridges and valleys spaced apart. The intersection line of the cross-section of the ridge or valley line perpendicular to the folded plate or folded membrane transparent condensation structure with the transparent condensation structure surface inside the solar evaporation and condensation chamber forms a continuously undulating folded line or curve. The ratio of the unfolded area of ​​the condensation interface obtained by fully unfolding all the continuously bent condensation interfaces of the folded plate or folded membrane transparent condensation structure onto a horizontal plane to the horizontal projected area of ​​the solar evaporation and condensation chamber is not less than 1.4 and not greater than 60. The folded plate or folded membrane support is multi... The components are positioned at different elevations and have continuously fluctuating zigzag or curved support surfaces, used to attach and fix multiple narrow, elongated transparent plastic sheets or films along these support surfaces; the transparent plastic sheets or films are airtight transparent plastic sheets or films with a light transmittance of not less than 0.75; the contact angle between the material of the transparent plastic sheet or film and the solvent is greater than or equal to 60 degrees, or the material layer of the transparent plastic sheet or film has a superhydrophobic coating on the condensation interface inside the solar evaporation and condensation chamber; the drip line is a sharp protruding edge on the condensation interface of the zigzag or zigzag transparent condensation structure, or has a curvature at the valley line of the condensation interface. The sharp edges formed by the abrupt change in direction are used to allow the condensed solvent droplets that converge at the condensation interface to fall. The transparent guide channel, made of transparent material, is located vertically below the droplet line and collects the droplets falling from the droplet line, guiding them to the liquid collection tank inside the solar evaporation condensation chamber. The material of the transparent guide channel has a contact angle with the solvent greater than or equal to 60 degrees, or the surface of the transparent guide channel has a superhydrophobic coating on the solvent. The transparent condensation structure fasteners are used to secure the transparent condensation structure to the solar evaporation condensation chamber with bolts, clips, or magnetic attachments, forming an airless environment. The transparent condensation structure has a leak-proof airtight interface; the fasteners of the transparent condensation structure are removable to allow for regular maintenance of the internal components of the solar evaporation condensation chamber, especially for regular cleaning of the solar heat-absorbing evaporation plate and collection of the solute precipitated from the urea solution within the solar heat-absorbing evaporation plate; furthermore, the folded plate or folded film transparent condensation structure also has transparent heat transfer ribs; the transparent heat transfer ribs are openings on the transparent plastic sheet or film that allow the solvent vapor to flow in and the solvent after condensation to flow out, and the openings connect to an airtight cavity enclosed by a transparent plastic sheet or transparent plastic film that protrudes outward from the solar evaporation condensation chamber and has an enlarged condensation interface.

[0014] The evaporation and condensation chamber collection tank is located inside the solar evaporation and condensation chamber and is a trough-shaped container used to collect the condensed solvent droplets dripping from the transparent condensation structure. The bottom of the evaporation and condensation chamber collection tank has a primary condensation reflux pipe interface for connecting to the primary condensation reflux pipeline, allowing the condensed solvent to flow by gravity from the evaporation and condensation chamber collection tank to the condensed solvent collection chamber. The evaporation and condensation chamber shade plate on the shaded side inside the solar evaporation and condensation chamber shades the evaporation and condensation chamber collection tank, placing it in the shaded area where the temperature inside the solar evaporation and condensation chamber is relatively low.

[0015] The solar-powered evaporator is installed on the bottom plate of the solar-powered evaporator-condenser chamber, inside the solar-powered evaporator-condenser chamber. It is a shallow, flat-bottomed, dish-shaped container used to hold and spread the urea solution from the dissolving chamber into a thin liquid layer. Its surface is made of a dark-colored material with high solar radiation absorption. The solar-powered evaporator includes a heat-absorbing and conducting grid and an evaporator temperature sensor. After absorbing solar radiation, the temperature of the solar-powered evaporator rises, heating the thin layer of solution inside the evaporator to evaporate, generating solvent vapor and simultaneously causing solute to precipitate within the evaporator. The heat-absorbing and conducting grid is installed on the solar-powered evaporator and is in contact with the solution inside the evaporator; it is dark-colored. The solar absorber evaporator features a surface material with high solar radiation absorptivity and a metal body material with high thermal conductivity, comprising multiple parallel and spaced grids. The lower part of each grid is immersed in the solution within the evaporator, while the upper part protrudes above the liquid surface. During typical sunshine periods throughout the year, the grids maintain a spacing without significant mutual shading, ensuring that both the bottom of the solar absorber evaporator and the grids receive sufficient sunlight. An evaporator temperature sensor is located inside the solar absorber evaporator and close to its bottom, used to collect the bottom temperature signal within the solar absorber evaporator.

[0016] The solvent vapor concentration sensor is located inside the solar evaporation and condensation chamber and is used to monitor the real-time concentration of the solvent vapor. The solar evaporation and condensation chamber has one or more solvent vapor concentration sensors in different locations. The evaporation and condensation chamber exhaust pipe is used to discharge the small amount of ammonia gas generated by the hot hydrolysis of urea in the solar evaporation and condensation chamber. The gas collecting pipe is connected to the exhaust holes at the top of each protruding part of the top of the solar evaporation and condensation chamber and is used to collect multiple exhaust branches of ammonia gas in the solar evaporation and condensation chamber. The inlet of the exhaust valve collects all the gas collecting pipes, and the outlet is connected to one of the evaporation and condensation chamber exhaust pipes, which is used to control the on / off switch and exhaust rate of ammonia gas in the solar evaporation and condensation chamber. When the solvent vapor concentration sensor detects that the solvent vapor concentration in the solar evaporation and condensation chamber is lower than the limit, it opens the exhaust valve to complete the exhaust of ammonia gas generated in the solar evaporation and condensation chamber. The evaporation and condensation chamber anti-negative pressure air inlet valve is a one-way air inlet valve that introduces outside air into the solar evaporation and condensation chamber during the exhaust process.

[0017] The heat-insulating and sun-shading top cover and opening / closing mechanism of the evaporative condensation chamber are located outside the transparent condensation structure, and include: a top cover and a top cover opening / closing mechanism; the top cover has heat-insulating, sun-shading, and impact-resistant functions, and can be closed under the drive of the top cover opening / closing mechanism to cover the transparent condensation structure, suppressing the evaporation and condensation process of the solar evaporative condensation chamber and protecting the transparent condensation structure, or can be opened under the drive of the top cover opening / closing mechanism to expose the transparent condensation structure to the outdoor environment, thereby enhancing the evaporation and condensation process of the solar evaporative condensation chamber; furthermore, the inner side of the top cover has a high-reflectivity inner reflective surface, and the sun-facing surface inside the solar evaporative condensation chamber also has a high-reflectivity evaporative condensation chamber sun-facing reflective surface. When the top cover is opened and adjusted to an appropriate angle, the inner reflective surface of the top cover and the sun-facing reflective surface of the evaporative condensation chamber reflect sunlight to the solar heat-absorbing evaporation plate.

[0018] The outer enclosure structure of the condensate collection chamber's thermal insulation structure is an enclosure structure with an opaque thermal insulation material layer; the bottom plate of the condensate collection chamber is a bottom plate enclosure structure with an opaque thermal insulation material layer; the inter-chamber thermal insulation board is an enclosure structure with an opaque thermal insulation material layer between the condensate collection chamber and the dissolving chamber, to reduce heat transfer from the dissolving chamber to the condensate collection chamber, thereby reducing secondary evaporation loss of the solvent in the condensate collection chamber; the bottom of the condensate collection chamber has a secondary condensate reflux pipe interface for connecting to the secondary condensate reflux pipe leading to the solvent chamber; the airtight opening of the condensate collection chamber is an opening with an airtight sealing strip on the top of the condensate collection chamber.

[0019] The inlet of the primary delivery pipeline in the liquid delivery and condensation reflux pipeline is connected to the solvent tank pump in the solvent tank, and the outlet is the dissolving tank replenishment port for inputting the solvent into the dissolving tank system in the dissolving chamber; the inlet of the secondary delivery pipeline is connected to the dissolving tank pump in the dissolving chamber, and the outlet is the evaporation plate replenishment port for inputting the urea solution into the solar evaporation evaporation plate in the solar evaporation condensation chamber; the inlet of the primary condensation reflux pipeline is connected to the primary condensation reflux pipe interface at the bottom of the evaporation condensation chamber collection tank in the solar evaporation condensation chamber, and the outlet has a primary pipeline outlet airtight valve, which is inserted into the airtight opening of the condensation solvent collection tank, so that the condensed solvent collected in the evaporation condensation chamber collection tank can be discharged by gravity. The solvent flows by gravity into the condensate collection chamber, and the primary pipeline outlet air-tight valve simultaneously purges air when the condensed solvent flows back into the condensate collection chamber and seals the chamber when no solvent flows in. The secondary condensate return pipeline inlet is connected to the secondary condensate return pipe interface at the bottom of the condensate collection chamber, and the outlet is airtightly connected to the solvent chamber through the condensate return pipe interface on the solvent chamber. The secondary condensate return pipeline outlet has a secondary pipeline outlet air-tight valve, which allows the condensed solvent collected in the condensate collection chamber to flow by gravity into the solvent chamber, simultaneously purging air when solvent flows into the solvent chamber and sealing the chamber when no solvent flows in.

[0020] The evaporation control system controls the operation of the dissolving tank heating device, the solvent tank pump, and the dissolving tank pump based on the temperature signal at the bottom of the solar evaporation plate collected by the evaporation plate temperature sensor, the solvent vapor concentration signal in the solar evaporation condensation chamber collected by the solvent vapor concentration sensor, the urea solution temperature signal in the dissolving tank collected by the tank liquid temperature sensor, and the urea solution volume signal in the dissolving tank collected by the tank liquid level sensor. This ensures that the solvent in the dissolving tank is within a temperature range that efficiently dissolves urea and reduces evaporation loss. Furthermore, the system ensures that the amount of solvent input from the solvent tank to the dissolving tank, the amount of urea solution generated in the dissolving tank, and the amount of urea solution input to the solar evaporation plate are matched with the amount of urea solution evaporating in the solar evaporation condensation chamber. The evaporation control system can also issue an overheating alarm signal for the solar evaporation condensation chamber to remind the user to close the top cover, or automatically activate the top cover opening and closing mechanism to close the top cover.

[0021] The exhaust irrigation tank is used to store water and generate irrigation water containing soluble fertilizer. When the water level in the exhaust irrigation tank is insufficient, water is added through the water and fertilizer inlet as irrigation water. Solutes precipitated in the solar heat-absorbing evaporation plate are also added through the water and fertilizer inlet as urea solid fertilizer for effective desalination. Simultaneously, the exhaust irrigation tank also acts as a treatment device for ammonia gas discharged from the solar evaporation condensation chamber, absorbing the ammonia gas with the irrigation water to generate plant-absorbable fertilizer. Soluble ammonium nitrogen fertilizer; the outer enclosure structure of the exhaust irrigation water tank is an enclosure structure with an opaque insulation material layer; the bottom plate of the water tank is a bottom plate enclosure structure with an opaque insulation material layer, integrated with the top plate of the planting cabinet, forming an integrated greening planting module with the exhaust irrigation water tank on top and the planting cabinet below; the water tank's seepage-proof and corrosion-resistant lining is a stainless steel or organic polymer material lining that can withstand the corrosion of aqueous solutions containing weakly acidic or weakly alkaline water-soluble fertilizers; the evaporation condensation chamber exhaust... The vent pipe interface and subsurface vent pipe are airtight vent interfaces on the evaporative condensation chamber vent pipe connected to the vent pipe inside the vent irrigation tank. The evaporative condensation chamber vent pipe interface is airtightly sealed through the tank wall of the vent irrigation tank and connected to a subsurface vent pipe extending below the surface of the irrigation water inside the vent irrigation tank for venting. This allows all ammonia-containing gas flow from the solar evaporative condensation chamber to be vented below the surface of the irrigation water, ensuring that the ammonia is fully absorbed by the irrigation water. The vent pipe and filter on the top of the vent irrigation tank are located at the top, maintaining an air gap between them and the surface of the irrigation water. This air gap is used to discharge gas flow that has been absorbed by the irrigation water layer and had soluble odor gases removed to the outside atmosphere. The filtration and adsorption further remove odors from the discharged gas and maintain the vent irrigation tank at normal pressure. The drip irrigation pipe connector and switch valve are used to connect to the drip irrigation system in the planting cabinet, using the irrigation water in the vent irrigation tank for plant irrigation and controlling the switching on and off of the drip irrigation system.

[0022] The outer enclosure of the planting cabinet's thermal insulation structure is an enclosure with an opaque thermal insulation material layer; the transparent thermal insulation enclosure is located on the sun-facing side of the planting cabinet, allowing easy transmission of solar radiation while providing insulation and airtightness; the transparent thermal insulation enclosure and the thermal insulation enclosure together form an insulated and airtight space, allowing the planting cabinet to utilize solar radiation transmission, as well as the heat absorption and storage of the planting trough and planting medium, to achieve passive solar heating in winter; the planting cabinet is transparent... The transparent insulated enclosure structure has an openable fan; the retractable and adjustable external shading is located on the outside of the transparent insulated enclosure structure of the planting cabinet; the planting trough is a container for holding the planting medium, and its main body material is a dark-colored solar radiation heat-absorbing and heat-storing material, or its main body is a heat-storing material with a dark-colored solar radiation heat-absorbing coating on the sun-facing side, so as to facilitate passive solar heating in winter; the planting medium is a loose, porous, water-retaining and breathable inorganic or organic solid planting medium or hydroponic nutrient solution medium used for plant planting; when the planting medium is solid, it is integrated with a drip irrigation system.

[0023] The beneficial effects of the solar-powered urea evaporation and recycling system proposed in this invention are as follows: using an economical and suitable organic solvent as a carrier, urea is recovered from the residual solids of urine evaporation and excess inorganic salts are removed, providing effective desalination solid fertilizer that can be applied for a long time for greening and planting devices. The entire recycling process is a physical process with no chemical reaction losses or environmental pollution. It can achieve efficient evaporation, efficient condensation and low energy consumption operation using solar energy, and can be driven by green electricity from a new energy power supply system to achieve off-grid zero energy consumption. It has comprehensive benefits for urine waste treatment, resource recycling, ecological landscaping and agricultural planting. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of an embodiment of a solar-powered urea evaporation and recycling system according to the present invention.

[0025] Figure 2 This is a schematic diagram of an embodiment of an integrated urea recovery system module of a solar-powered urea evaporation and recovery system according to the present invention.

[0026] Figure 3 This is a partial cross-sectional schematic diagram of the component assembly of an embodiment of an integrated urea recovery system module of a solar-powered evaporation urea recovery and utilization system according to the present invention.

[0027] Figure 4 This is a schematic diagram of an embodiment of a greening planting module integrating an exhaust irrigation water tank and a planting cabinet in a solar evaporation urea recovery and utilization system according to the present invention.

[0028] Figure 5This is an exploded view of an embodiment of a transparent condensation structure with transparent heat transfer ribs in a solar evaporation urea recovery system according to the present invention, which uses a transparent plastic sheet.

[0029] Figure 6 This is an exploded view of an embodiment of a transparent condensation structure with transparent heat transfer ribs in a solar evaporation urea recovery system according to the present invention, which uses a transparent plastic film.

[0030] Figure 7 This is a partial cross-sectional schematic diagram of an embodiment of the solar heat-absorbing evaporation plate in a solar evaporation urea recovery system according to the present invention.

[0031] Figure labels: 0. New energy power supply system; 01. Photovoltaic power generation system; 02. Wind power generation system; 03. Energy storage system; 1. Thin felt containing residual solids from urine evaporation; 2. Solvent tank; 21. Solvent tank insulation and heat insulation enclosure structure; 211. External enclosure structure; 2111. Solvent tank phase change heat storage material layer; 212. Solvent tank top plate; 22. Solvent anti-seepage and corrosion-resistant lining; 23. Condensate return pipe interface; 24. Solvent tank pump; 25. Solvent; 3. Dissolving tank; 31. Dissolving tank insulation and heat insulation enclosure structure; 311. External enclosure structure; 312. Dissolving tank bottom plate; 32. Dissolving tank system; 321. Dissolving tank; 322. Urea solution; 323. Thin felt support; 324. Dissolving tank electric heating device; 325. Liquid temperature inside the tank. Sensors; 326. Liquid level sensor in the tank; 33. Dissolving chamber pump; 34. Airtight opening of the dissolving chamber; 4. Solar evaporation and condensation chamber; 41. Thermal insulation enclosure structure of the evaporation and condensation chamber; 411. External enclosure structure; 412. Bottom plate of the evaporation and condensation chamber; 42. Transparent condensation structure; 421. Transparent condensation structure with folded plate or folded film; 4211. Folded plate or folded film support; 4212. Transparent plastic sheet or film; 4213. Drip line; 4214. Transparent guide channel; 4215. Fasteners for transparent condensation structure; 4216. Transparent heat transfer ribs; 43. Liquid collection tank of the evaporation and condensation chamber; 431. Primary condensation return pipe interface; 432. Sunshade panel on the shaded side of the evaporation and condensation chamber; 44. Solar heat-absorbing evaporation plate; 441. Heat-absorbing and heat-conducting grid; 4 42. Evaporation pan temperature sensor; 443. Solution in the evaporation pan; 444. Solute precipitated in the evaporation pan; 45. Solvent vapor concentration sensor; 46. Evaporation condensation chamber exhaust pipe; 461. Gas collection pipe; 462. Exhaust valve; 463. Evaporation condensation chamber exhaust pipe; 47. Evaporation condensation chamber anti-negative pressure air inlet valve; 48. Evaporation condensation chamber heat-insulating and sun-shading top cover and opening / closing mechanism; 481. Top cover; 4811. Inner reflective surface of the top cover; 482. Top cover opening / closing mechanism; 49. Sun-facing reflective surface of the evaporation condensation chamber; 5. Condensate collection chamber; 51. Condensate collection chamber heat-insulating enclosure structure; 511. Outer enclosure structure; 512. Condensate collection chamber bottom plate; 513. Inter-chamber heat-insulating board; 52. Secondary condensate reflux pipe interface; 5 3. Airtight opening of the condensate collection chamber; 6. Liquid conveying and condensate return pipeline; 61. Primary conveying pipeline; 611. Dissolving tank replenishment port; 62. Secondary conveying pipeline; 621. Evaporation pan replenishment port; 63. Primary condensate return pipeline; 631. Primary pipeline outlet shut-off valve; 64. Secondary condensate return pipeline; 641. Secondary pipeline outlet shut-off valve; 7. Evaporation control system; 8. Exhaust irrigation water tank; 81. Exhaust irrigation water tank insulation and heat insulation enclosure structure; 811. External enclosure structure; 812. Water tank bottom plate; 82. Water tank seepage-proof and corrosion-resistant inner lining; 83. Evaporation condensation chamber exhaust pipe interface and submerged exhaust pipe; 831. Evaporation condensation chamber exhaust pipe interface; 832. Submerged exhaust pipe; 84. Water tank top exhaust pipe and filter;85. Water tank drip irrigation pipe connectors and switch valves; 86. Water tank water and fertilizer inlets; 87. Irrigation water; 9. Planting cabinet; 91. Planting cabinet thermal insulation enclosure structure; 911. External enclosure structure; 912. Planting cabinet top panel; 92. Planting cabinet transparent thermal insulation enclosure structure; 921. Opening fan; 93. Retractable and adjustable external shading; 94. Planting trough and planting medium; 941. Planting trough; 942. Planting medium; 95. Drip irrigation system; 96. Plants. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. The embodiments shown in the drawings are only some embodiments of the present invention. Other embodiments obtained by those skilled in the art without creative effort based on the essence of the present invention are all within the protection scope of the present invention.

[0033] like Figure 1 As shown, the present invention proposes a solar-powered urea evaporation and recycling system, comprising: a new energy power supply system 0; characterized by: a thin felt 1 containing residual solids from urine evaporation, a solvent chamber 2, a dissolving chamber 3, a solar evaporation condensation chamber 4, a condensation solvent collection chamber 5, a liquid conveying and condensation return pipeline 6, and an evaporation control system 7; and having an exhaust irrigation water tank 8 and a planting cabinet 9; the new energy power supply system 0 provides green power energy for the operation of the solar-powered urea evaporation and recycling system, including: a photovoltaic power generation system 01 and / or a wind power generation system 02, and an energy storage system 03; the thin felt 1 containing residual solids from urine evaporation is a thin layer of fibrous or sponge-like porous absorbent material, which absorbs urine and is then evaporated to lose moisture, and the substances dissolved in the urine precipitate out, becoming residual solids attached to the thin felt; wherein approximately 50% of the residual solids from urine evaporation are urea, and the remainder is mainly inorganic salts, primarily sodium chloride, and trace amounts of organic matter, primarily creatinine and uric acid.

[0034] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, the solvent chamber 2 is a chamber for storing solvent 25, which contains solvent 25 whose solubility for urea at the same temperature is significantly greater than its solubility for inorganic salts in the residual solids of urine evaporation. The solvent chamber 2 includes: a solvent chamber thermal insulation enclosure structure 21, a solvent impermeable and corrosion-resistant lining 22, a condensate reflux pipe interface 23, a solvent chamber pump 24, and solvent 25. The solvent chamber thermal insulation enclosure structure 21 includes: an outer enclosure structure 211 and a solvent chamber top plate 212. Further, the outer enclosure structure 211 of the solvent chamber thermal insulation enclosure structure 21 has a solvent chamber phase change heat storage material layer 2111. The dissolution chamber 3 has a dissolution device and an adjustable thermal environment, enabling the solvent 25 to dissolve efficiently under normal pressure. The dissolving chamber 3 contains urea in a thin felt 1 containing residual solids from urine evaporation, forming a urea solution 322. The thin felt 1 containing residual solids from urine evaporation is placed inside the dissolving chamber 3 during operation. The dissolving chamber 3 includes: a thermal insulation enclosure 31, a dissolving tank system 32, a dissolving chamber pump 33, and an airtight opening 34. The thermal insulation enclosure 31 includes: an outer enclosure 311 and a dissolving chamber bottom plate 312. The dissolving tank system 32 includes: a dissolving tank 321, a urea solution 322, a thin felt support 323, a dissolving tank heating device 324, a liquid temperature sensor 325, and a liquid level sensor 326. The solar-powered evaporation and condensation chamber 4 utilizes solar energy for heating, allowing the urea solution to evaporate. The urea solution 322 evaporates the solvent 25 vapor and precipitates urea, and the solvent 25 vapor is condensed into liquid solvent 25 and collected in the chamber; the solar evaporation condensation chamber 4 includes: an evaporation condensation chamber thermal insulation enclosure structure 41, a transparent condensation structure 42, an evaporation condensation chamber liquid collection tank 43, a solar heat absorption evaporation plate 44, a solvent vapor concentration sensor 45, an evaporation condensation chamber exhaust pipe 46, an evaporation condensation chamber anti-negative pressure air inlet valve 47, and an evaporation condensation chamber thermal insulation sunshade top cover and opening and closing mechanism 48; the evaporation condensation chamber thermal insulation enclosure structure 41 includes: an outer enclosure structure 411 and an evaporation condensation chamber bottom plate 412; the transparent condensation structure 42 allows solar radiation to pass through and allows the solvent 25 vapor to condense. The structure consists of a transparent material layer, its supporting structure, and accessories; the evaporative condensation chamber liquid collection tank 43 is located inside the solar evaporative condensation chamber 4, the bottom of the evaporative condensation chamber liquid collection tank 43 has a primary condensation return pipe interface 431, and the evaporative condensation chamber shade plate 432 on the shaded side inside the solar evaporative condensation chamber 4 provides shade for the evaporative condensation chamber liquid collection tank 43; the solar heat-absorbing evaporation plate 44 has a heat-absorbing and heat-conducting grid 441 and an evaporation plate temperature sensor 442; the evaporative condensation chamber exhaust pipe 46 includes: a gas collection pipe 461, an exhaust valve 462, and an evaporative condensation chamber exhaust pipe 463; the evaporative condensation chamber heat-insulating and sun-shading top cover and opening and closing mechanism 48 includes: a top cover 481 and a top cover opening and closing mechanism 482.Furthermore, the transparent condensation structure 42 adopts a folded plate or folded film transparent condensation structure 421, including: a folded plate or folded film support 4211, a transparent plastic sheet or film 4212, a drip line 4213, a transparent guide channel 4214, and a transparent condensation structure fastener 4215; furthermore, the folded plate or folded film transparent condensation structure 421 also has transparent heat transfer ribs 4216; furthermore, the inner surface of the top cover 481 of the evaporation condensation chamber heat preservation and sunshade top cover and opening and closing mechanism 48 has an inner reflective surface 4811, and the inner sun-facing surface of the solar evaporation condensation chamber 4 has a sun-facing reflective surface 49; the condensate collection chamber 5 is used to collect the condensate generated in the solar evaporation condensation chamber 4. The solvent 25 chamber; the condensate collection chamber 5 includes: a condensate collection chamber thermal insulation enclosure structure 51, a secondary condensate return pipe interface 52, and a condensate collection chamber airtight opening 53; the condensate collection chamber thermal insulation enclosure structure 51 includes: an outer enclosure structure 511, a condensate collection chamber bottom plate 512, and a chamber thermal insulation board 513; the liquid transport and condensate return pipeline 6 is used to transport the solvent 25 to the dissolving chamber 3, transport the urea solution 322 to the solar evaporation condensation chamber 4, and return the condensed solvent 25 to the solvent chamber 2; the liquid transport and condensate return pipeline 6 includes: a primary transport pipeline 61, a secondary transport pipeline 62, and a primary condensate return pipeline 6. 3. Secondary condensation reflux pipeline 64; the outlet of the primary conveying pipeline 61 is the dissolving tank replenishment port 611; the outlet of the secondary conveying pipeline 62 is the evaporation pan replenishment port 621; the outlet of the primary condensation reflux pipeline 63 has a primary pipeline outlet shut-off valve 631; the outlet of the secondary condensation reflux pipeline 64 has a secondary pipeline outlet shut-off valve 641; the evaporation control system 7 is the control system for the operation of the solar evaporation urea recovery and utilization system; the exhaust irrigation water tank 8 is used for water storage and for dissolving the effectively desalinated urea solid fertilizer and ammonia generated by the solar evaporation condensation chamber 4 to generate irrigation water 87 containing soluble fertilizer; the exhaust irrigation water tank 8 includes: exhaust irrigation water tank thermal insulation enclosure. The structure 81 includes: a water tank with a seepage-proof and corrosion-resistant inner lining 82; an evaporation and condensation chamber exhaust pipe interface and a submerged exhaust pipe 83; a water tank top exhaust pipe and filter 84; a water tank drip irrigation pipeline connector and switch valve 85; a water tank water and fertilizer inlet 86; and irrigation water 87. The exhaust irrigation water tank insulation and heat-insulating enclosure structure 81 includes: an outer enclosure structure 811 and a water tank bottom plate 812. The planting cabinet 9 is a greening planting device for three-dimensional planting of plants in a limited space. The planting cabinet 9 includes: a planting cabinet insulation and heat-insulating enclosure structure 91; a planting cabinet transparent insulation and heat-insulating enclosure structure 92; an adjustable external shading 93; a planting trough and planting medium 94; and a drip irrigation system 95. The planting cabinet insulation and heat-insulating enclosure structure 91 includes: an outer enclosure structure 911 and a planting cabinet top plate 912.The transparent, insulated enclosure structure 92 of the planting cabinet has an operable fan 921.

[0035] like Figure 1 , Figure 2 , Figure 3 As shown, in the operation of the solar-powered urea evaporation and recovery system, the solvent 25 is fed into the dissolving chamber 3 to dissolve the urea in the thin felt 1 containing residual solids from urea evaporation under normal pressure and temperature conditions, leaving behind inorganic salts to form a urea solution 322 containing the solvent 25 and urea. Then, the urea solution 322 is fed into the solar-powered evaporation condensation chamber 4 for evaporation, causing the solvent 25 to become solvent 25 vapor, which separates from the urea dissolved in the urea solution 322. The vapor is then condensed back into liquid solvent 25 and sent to the condensation solvent collection chamber 5, and then returned to the solvent chamber 2 for recycling. The urea in the urea solution 322 fed into the solar-powered evaporation condensation chamber 4 precipitates as effectively desalted urea solid fertilizer. During operation, the solvent 25, the urea solution 322, and the condensed urea solution... The solvent 25 flows through the liquid transport and condensation return pipeline 6 and is controlled by the evaporation control system 7 to achieve low-energy operation of the solar evaporation urea recovery system. This allows the system to be driven entirely by green electricity from the new energy power supply system 0, recycling the solvent 25 to gradually recover the urea in the thin felt 1 containing residual solids from urea evaporation in the dissolving chamber 3 into effectively desalinated urea solid fertilizer in the solar evaporation condensation chamber 4. The effectively desalinated urea solid fertilizer is collected and added to the exhaust irrigation water tank 8 for complete dissolution. The ammonia gas produced by the hot hydrolysis of urea in the solar evaporation condensation chamber 4 is also absorbed in the exhaust irrigation water tank 8, making the water in the exhaust irrigation water tank 8 irrigation water containing effectively desalinated soluble fertilizer, which can be applied to the plants in the planting cabinet 9 for a long period.

[0036] like Figure 1 , Figure 2 , Figure 3As shown, solvent 25 is an organic solvent with a boiling point above 50°C and below 100°C at normal pressure. Under the same temperature conditions, it readily dissolves or can dissolve urea in the residual solids of urine evaporation, but is slightly soluble, or difficult to dissolve, or cannot dissolve inorganic salts in the residual solids of urine evaporation. That is, the solubility of urea in the residual solids of urine evaporation is significantly greater than the solubility of inorganic salts in the residual solids of urine evaporation. Further, solvent 25 is a high-concentration ethanol solution or anhydrous ethanol with a concentration of not less than 95%, and does not exceed the methanol content limit specified for pharmaceutical / food grade ethanol. The main component of the residual solids of urine evaporation is urea, followed by inorganic salts, the main components of which are sodium chloride and potassium chloride. At room temperature (25°C), the solubility of urea in anhydrous ethanol is approximately 6.5 g / 100 g, the solubility of sodium chloride in anhydrous ethanol is approximately 0.055 g / 100 g, and the solubility of potassium chloride in anhydrous ethanol is approximately 0.055 g / 100 g. The solubility of urea in anhydrous ethanol is approximately 0.034 g / 100 g. At 60°C, the solubility of urea in anhydrous ethanol is approximately 22.0 g / 100 g, sodium chloride is approximately 0.070 g / 100 g, and potassium chloride is approximately 0.043 g / 100 g. The solubility of urea, sodium chloride, and potassium chloride in anhydrous ethanol all increases with increasing temperature, but the increase in solubility of urea in anhydrous ethanol is more significant, while the increase in solubility of sodium chloride and potassium chloride in anhydrous ethanol is only slight. When the solvent 25 is a high-concentration ethanol solution with a concentration of not less than 95%, it can avoid excessive sodium chloride and potassium chloride dissolving in water, which would increase the inorganic salt content in the urea solution 322, and consequently lead to excessive inorganic salts in the precipitated solid urea fertilizer, which is detrimental to plants.

[0037] like Figure 1 , Figure 2 , Figure 3As shown, the thin felt 1 containing residual solids from urine evaporation, solvent chamber 2, dissolving chamber 3, solar evaporation and condensation chamber 4, condensate collection chamber 5, liquid conveying and condensate return pipeline 6, and evaporation control system 7 are combined into an integrated urea recovery system module. The module adopts a combined upper, middle, and lower layout to reduce floor space and achieve system miniaturization. The solvent chamber 2 is located at the lower part of the urea recovery system module, lowering the center of gravity and increasing stability. The solar evaporation and condensation chamber 4 is located at the upper part of the urea recovery system module and faces the sun, allowing it to receive solar radiation. The condensate collection chamber 5... In the middle of the urea recovery system module, the solar evaporation condensation chamber 4, located above the condensate collection chamber 5, is connected via the primary condensation reflux pipeline 63, and the solvent chamber 2, located below the condensate collection chamber 5, is connected via the secondary condensation reflux pipeline 64. The condensed solvent 25 in the solar evaporation condensation chamber 4 flows into the condensate collection chamber 5 first, and then returns to the solvent chamber 2, requiring no driving energy consumption. The dissolving chamber 3, located in the middle of the urea recovery system module, is connected to the solvent chamber 2, located below the dissolving chamber 3, via the primary delivery pipeline 61. Furthermore, the secondary delivery pipeline 62 connects to the solar evaporation and condensation chamber 4 located above the dissolution chamber 3. Driven by the solvent chamber pump 24, the solvent 25 is input from the solvent chamber 2 into the dissolution chamber 3 to form the urea solution 322. Then, driven by the dissolution chamber pump 33, the urea solution 322 is input from the dissolution chamber 3 into the solar evaporation and condensation chamber 4 for evaporation. The dissolution chamber 3 is located in the middle of the urea recovery system module, with a compact spatial arrangement and short and efficient delivery pipelines. The bottom plate 312 of the dissolution chamber and the top plate 212 of the solvent chamber are integrated, and the bottom of the condensed solvent collection chamber... Plate 512 and the solvent chamber top plate 212 are integrated; the top of the dissolving chamber 3 has a dissolving chamber airtight opening 34, and the top of the condensing solvent collection chamber 5 has a condensing solvent collection chamber airtight opening 53; the solar evaporation condensation chamber 4, including the evaporation condensation chamber bottom plate 412, is a movable part of the urea recovery system module. The evaporation condensation chamber bottom plate 412 of the solar evaporation condensation chamber 4 can be moved away from the top of the dissolving chamber 3 and the condensing solvent collection chamber 5 by translation and / or rotation, so that the dissolving chamber airtight opening 34 and the condensing solvent collection chamber airtight opening 53 are exposed and can be opened;Before the solar-powered urea evaporation recovery system is put into operation, the thin felt 1 containing residual solids from urine evaporation is placed on the thin felt support 323 in the dissolution tank 321 of the dissolution chamber 3 through the open airtight opening 34 of the dissolution chamber, laid flat and fixed, and the solvent 25 is injected into the condensate collection chamber 5 through the open airtight opening 53 of the condensate collection chamber, so that the solvent 25 can be injected into the solvent chamber 2 through the secondary condensation return pipeline 64; after the installation of the thin felt 1 containing residual solids from urine evaporation and the addition of the solvent 25 are completed, the bottom plate 412 of the evaporation condensation chamber is moved back and restored to the position of pressing the dissolution chamber 3 and the... The top of the condensate collection chamber 5 is positioned such that both the airtight opening 34 of the dissolving chamber and the airtight opening 53 of the condensate collection chamber are closed and kept airtight, preventing leakage and heat loss of the solvent 25 vapor. An inter-chamber insulation plate 513 is provided between the condensate collection chamber 5 and the dissolving chamber 3 to prevent excessive heat transfer from the dissolving chamber 3 to the condensate collection chamber 5 during heating, which would increase heat loss in the dissolving chamber 3, leading to high energy consumption of the dissolving tank heating device 324. Furthermore, it prevents the condensed solvent 25 in the condensate collection chamber 5 from evaporating again upon heating and dissipating out of the condensate collection chamber 5, thus reducing the condensation and collection efficiency of the solvent 25.

[0038] like Figure 1 , Figure 4 As shown, the exhaust irrigation water tank 8 and the planting cabinet 9 are combined into an integrated greening planting module. In the greening planting module, the exhaust irrigation water tank 8 is on top and the planting cabinet 9 is on the bottom. The bottom plate 812 of the exhaust irrigation water tank 8 and the top plate 912 of the planting cabinet 9 are integrated, allowing the irrigation water 87 to flow by gravity to irrigate the plants, reducing the energy consumption of the greening planting module. The greening planting module is a utilization system for the output products of the urea recovery system module, integrating waste treatment, ecological landscape and agricultural planting functions. Furthermore, the greening planting module and the urea recovery system module are combined into a modular solar evaporation urea recovery and utilization system, which is integrated with the ecological building facade and / or roof.

[0039] like Figure 2 , Figure 3As shown, the outer enclosure structure 211 of the solvent chamber thermal insulation enclosure structure 21 is an enclosure structure with an opaque thermal insulation material layer to reduce heat transfer between the solvent chamber 2 and the outdoor environment; the top plate 212 of the solvent chamber also has an opaque thermal insulation material layer to reduce heat transfer between the solvent chamber 2 and the dissolving chamber 3, and between the solvent chamber 2 and the condensate collection chamber 5; furthermore, the outer enclosure structure 211 of the solvent chamber thermal insulation enclosure structure 21 has a solvent chamber phase change heat storage material layer 2111 close to the inner side of the chamber, so that when the solvent chamber 2 is not operating without its own refrigeration and heating equipment, the internal temperature of the solvent chamber 2 remains relatively stable under the diurnal fluctuations of the outdoor ambient temperature, so that the solvent 25 can remain in a liquid form with a low evaporation rate for a long time throughout the year, and avoids freezing, and avoids the solvent 25 input into the dissolving chamber 3 from being too cold, thereby significantly increasing the energy consumption of the dissolving tank electric heating device 324; a specific In this embodiment, the phase change temperature of the solvent chamber phase change heat storage material layer 2111 is set according to local climate conditions to a temperature suitable for summer or winter modes. It is not higher than the boiling point of the solvent 25 at atmospheric pressure minus 3°C, and not lower than the solid-liquid phase change temperature of the solvent 25 at atmospheric pressure plus 3°C, and not lower than 10°C. The solvent-proof and corrosion-resistant lining 22 is a stainless steel or organic polymer material lining that can withstand the corrosion of the solvent 25. The condensate reflux pipe interface 23 is used for an airtight connection to the secondary condensate reflux pipe 64, allowing the solvent 25 from the condensate solvent collection chamber 5 to flow into the solvent chamber 2 through the secondary condensate reflux pipe 64 without any solvent 25 vapor overflowing. The solvent chamber pump 24 is located in the solvent chamber 2 and connected to the primary delivery pipe 61, providing driving force for the solvent 25 to be input from the solvent chamber 2 into the dissolution chamber 3 through the primary delivery pipe 61.

[0040] like Figure 2 , Figure 3As shown, the outer enclosure structure 311 of the thermal insulation enclosure structure 31 of the dissolution chamber is an enclosure structure with an opaque thermal insulation material layer to reduce heat transfer between the dissolution chamber 3 and the outdoor environment; the dissolution tank system 32 is located inside the dissolution chamber 3 and is used to contain the solvent 25 and the thin felt 1 containing the residual solids from urine evaporation, and to keep the thin felt 1 containing the residual solids from urine evaporation in a completely wetted solid-liquid contact state to generate urea solution 322. It can collect data in real time to maintain a normal pressure thermal environment suitable for the efficient dissolution of urea by the solvent 25, and can also collect data in real time to control the input of the solvent 25 from the solvent chamber 2 and the output of the urea solution 322 from the solar evaporation and condensation chamber 4. The dissolving tank 321 is a flat-bottomed storage tank-shaped container located inside the dissolving chamber 3, used to hold the solvent 25 and the thin felt 1 containing residual solids from urine evaporation, which is spread out flat. The dissolving tank 321 has a detachable thin felt support 323 inside, used to support and fix the spread-out thin felt 1 containing residual solids from urine evaporation. After the solvent 25 is injected into the dissolving tank 321, its liquid surface completely submerges the thin felt 1 containing residual solids from urine evaporation, increasing the contact area between the solvent 25 and the thin felt 1, thereby improving the urea dissolution efficiency. The dissolving tank heating device 324 is installed close to the outer wall of the bottom of the dissolving tank 321, used to heat the urea solution 322 inside the dissolving tank 321. The temperature is increased to improve the solubility and dissolution efficiency of urea in solvent 25; the liquid temperature sensor 325 in the tank is used to collect the temperature signal of the urea solution 322 in the dissolution tank 321; the dissolution tank heating device 324 and the liquid temperature sensor 325 operate under the control of the evaporation control system 7 to maintain the solvent 25 in the dissolution tank 321 within a temperature range that ensures efficient urea dissolution and low evaporation loss; when the temperature of the urea solution 322 in the dissolution tank 321 collected by the liquid temperature sensor 325 is lower than the lower limit of the efficient dissolution temperature range of urea in solvent 25, the evaporation control system 7 controls the dissolution tank heating device 324 to heat the urea solution in the dissolution tank 321. Intermittent heating 322 raises the temperature of the urea solution 322 and maintains it within the temperature range where the solvent 25 efficiently dissolves urea. The liquid level sensor 326 in the tank is used to collect the signal of the amount of urea solution 322 in the dissolving tank 321 to control the amount of urea solution 322 in the dissolving tank 321, so as to prevent the thin felt 1 containing residual solids from evaporation of urine from being exposed above the liquid surface of the urea solution 322, and to prevent the urea solution 322 from overflowing from the dissolving tank 321. The dissolving chamber pump 33 is located inside the dissolving chamber 3 and is connected to the secondary delivery pipeline 62, providing driving force for the urea solution 322 in the dissolving tank 321 to be input into the solar evaporation and condensation chamber 4 from the dissolving chamber 3 through the secondary delivery pipeline 62.The airtight opening 34 of the dissolving chamber is an opening with an airtight sealing strip at the top of the dissolving chamber 3. After the top of the dissolving chamber 3 is opened, the airtight opening 34 can be opened, and the thin felt 1 containing the residual solids from urine evaporation can be placed inside the dissolving chamber 3 through the airtight opening 34. Closing the airtight opening 34 seals the top opening of the dissolving chamber 3 and maintains an airtight seal, preventing gas leakage from the edge of the opening and thus avoiding evaporation loss of the solvent 25 and heat loss within the dissolving chamber 3.

[0041] like Figure 2 , Figure 3 As shown, the outer enclosure structure 411 of the evaporative condensation chamber insulation and heat insulation enclosure structure 41 is an enclosure structure with an opaque insulation and heat insulation material layer to reduce heat transfer between the solar evaporative condensation chamber 4 and the outdoor environment; the bottom plate 412 of the evaporative condensation chamber is a bottom plate enclosure structure with an opaque insulation and heat insulation material layer, which is interconnected with the outer enclosure structure 411 of the evaporative condensation chamber insulation and heat insulation enclosure structure 41 and the transparent condensation structure 42, together enclosing the solar evaporative condensation chamber 4 to prevent vapor penetration; furthermore, the bottom plate 412 of the evaporative condensation chamber acts as an airtight cover for the airtight opening 34 of the dissolution chamber 3 and the airtight opening 53 of the condensation solvent collection chamber 5. When the bottom plate 412 of the evaporative condensation chamber covers the airtight opening 34 of the dissolution chamber and the airtight opening 53 of the condensation solvent collection chamber, the dissolution chamber 3 and the condensation solvent collection chamber 5 are sealed and kept airtight.

[0042] like Figure 2 , Figure 3 , Figure 5 , Figure 6As shown, the transparent condensation structure 42 is a structure located on the sun-facing side of the top of the solar evaporation condensation chamber 4, consisting of an airtight transparent material layer that allows solar radiation to pass through and has good heat transfer, along with its supporting structure and accessories; the transparent condensation structure 42 has a condensation interface for the solvent 25 vapor, which is the surface of the material layer in the solar evaporation condensation chamber 4 that is in simultaneous contact with the external air of the solar evaporation condensation chamber 4, located on the inner side of the solar evaporation condensation chamber 4; furthermore, the transparent condensation structure 42 adopts a folded plate or folded film transparent condensation structure 421, including: a folded plate or folded film support 4211, a transparent plastic sheet or film 4212, a drip line 4213, a transparent guide channel 4214, and a transparent condensation structure fastener 4215; the folded plate or folded film transparent condensation structure 421 is composed of multiple narrow transparent plastic sheets or... The thin films 4212 intersect or bend to form an airtight, transparent, thin-walled space enclosure structure with multiple ridges and valleys spaced apart; the cross-section of the ridge or valley line perpendicular to the transparent condensation structure 421 and the surface of the transparent condensation structure 42 inside the solar evaporation condensation chamber 4 intersects as a continuously undulating broken line or curve; the ratio of the unfolded area of ​​the condensation interface obtained by fully unfolding all the continuously bent condensation interfaces of the transparent condensation structure 421 onto a horizontal plane to the horizontal projected area of ​​the solar evaporation condensation chamber 4 is not less than 1.4 and not greater than 60; the broken plate or folded film support 4211 consists of multiple sets of support surfaces at different elevations and with continuously undulating broken lines or curves, used to attach and fix multiple narrow transparent plastic sheets or films 4212 along the support surfaces; the transparent plastic sheets or films 4212 have a light transmittance of not less than 0.75% airtight transparent plastic sheet or transparent plastic film; the contact angle between the material of the transparent plastic sheet or film 4212 and the solvent 25 is greater than or equal to 60 degrees. In one specific embodiment, fluorinated ethylene propylene copolymer (FEP) film, or polypropylene (PP) film, or polyethylene (PE) film, or cyclic olefin copolymer (COC) film, or polycarbonate (PC) sheet or film, or polyethylene terephthalate (PET) sheet or film, or polymethyl methacrylate (PMMA) sheet; or the material layer of the transparent plastic sheet or film 4212 has a superhydrophobic coating of the solvent 25 on the condensation interface inside the solar evaporation condensation chamber 4; the dripping... Line 4213 is a structure on the condensation interface of the folded plate or folded film transparent condensation structure 421 that has a sharp protruding edge or an edge formed by a point of abrupt curvature change at the valley line on the condensation interface, used to allow the condensed solvent 25 droplets flowing on the condensation interface to fall off; the transparent guide channel 4214 is made of transparent material and is located vertically below the location of the dripping line 4213, collecting the droplets dripping from the dripping line 4213 and guiding them to the liquid collection tank 43 of the evaporation condensation chamber inside the solar evaporation condensation chamber 4; the material of the transparent guide channel 4214 has a contact angle with the solvent 25 greater than or equal to 60 degrees, and in one specific embodiment, a polyurethane with structural rigidity is used. The transparent condenser 4214 is constructed using a carbonated polycarbonate (PC) channel, a polyethylene terephthalate (PET) channel, or a polymethyl methacrylate (PMMA) channel; or the surface of the transparent channel 4214 has a superhydrophobic coating of the solvent 25. The transparent condenser fastener 4215 secures the transparent condenser 42 to the solar evaporation condensation chamber 4 with bolts, clips, or magnetic fasteners, forming an airtight interface to maintain the airtightness of the solar evaporation condensation chamber 4. The transparent condenser fastener 4215 is removable for periodic maintenance of the internal components of the solar evaporation condensation chamber 4, particularly for periodic cleaning of the solar heat-absorbing evaporation plate 44 and collection of the solar heat-absorbing evaporation. The solute precipitated from the urea solution 322 within the condenser plate 44 is used as an effectively desalted urea solid fertilizer. Furthermore, the folded plate or folded film transparent condensation structure 421 also has transparent heat transfer ribs 4216. These transparent heat transfer ribs 4216 are openings on the transparent plastic sheet or film 4212 that allow the solvent 25 vapor to flow in and the condensed solvent 25 to flow out, and are connected to an airtight cavity enclosed by a transparent plastic sheet or film with an enlarged condensation interface protruding outwards from the solar evaporation condensation chamber 4. The transparent heat transfer ribs 4216 further increase the condensation interface area of ​​the folded plate or folded film transparent condensation structure 421, further improving its condensation efficiency.

[0043] like Figure 2 , Figure 3As shown, the evaporation condensation chamber collection tank 43 is located inside the solar evaporation condensation chamber 4 and is a trough-shaped container used to collect the condensed solvent 25 droplets dripping from the transparent condensation structure 42. The bottom of the evaporation condensation chamber collection tank 43 has a primary condensation return pipe interface 431 for connecting to the primary condensation return pipe 63, so that the condensed solvent 25 can flow by gravity to the condensation solvent collection chamber 5. The evaporation condensation chamber shade plate 432 on the shaded side inside the solar evaporation condensation chamber 4 blocks the evaporation condensation chamber collection tank 43 from sunlight, placing it in the shaded area where the temperature inside the solar evaporation condensation chamber 43 is relatively low, reducing the secondary evaporation of the condensed solvent 25 in the evaporation condensation chamber collection tank 43 and improving the recovery efficiency of the solvent 25.

[0044] like Figure 2 , Figure 3As shown, the solar heat-absorbing evaporation plate 44 of the solar evaporation and condensation chamber 4 is installed on the bottom plate 412 of the evaporation and condensation chamber inside the solar evaporation and condensation chamber 4. It is used to hold the urea solution 322 from the dissolving chamber 3 and to make it flow and spread into a thin liquid layer. It is a shallow, flat-bottomed, dish-shaped container with a dark-colored material with high solar radiation absorption rate. The solar heat-absorbing evaporation plate 44 has a heat-absorbing and heat-conducting grid 441 and an evaporation plate temperature sensor 442. After absorbing solar radiation, the temperature of the solar heat-absorbing evaporation plate 44 increases, heating... The solution 443 in the evaporation pan evaporates in a thin layer, generating solvent 25 vapor, and simultaneously causing solute 444 to precipitate in the evaporation pan. The heat-absorbing and conducting grid 441 is installed on the solar heat-absorbing evaporation pan 44 and is in contact with the solution 443 in the evaporation pan. It consists of multiple parallel and spaced grids with a dark-colored surface material with high solar radiation absorptivity and a metal body material with high thermal conductivity. The lower part of each grid of the heat-absorbing and conducting grid 441 is immersed in the solution 443 in the evaporation pan of the solar heat-absorbing evaporation pan 44, and the upper part is exposed. The liquid level of the solution 443 in the evaporation pan is such that, during typical sunshine hours throughout the year, especially from 9:00 AM to 3:00 PM, the spacing between the gratings of the heat-absorbing and conducting grid 441 remains consistent without significant shading, ensuring that the bottom of the solar heat-absorbing evaporation pan 44 and the heat-absorbing and conducting grid 441 receive sufficient sunlight. The solar heat-absorbing evaporation pan 44 increases its heat-collecting area and efficiency through the heat-absorbing and conducting grid 441, especially increasing the heat-collecting efficiency during periods of lower solar altitude angle, thereby increasing the overall solar energy efficiency of the solution 443 in the evaporation pan throughout the day. To improve thermal efficiency and prevent the solute 444 precipitated inside the evaporation pan from completely covering the bottom of the solar heat-absorbing evaporation pan 44 and reflecting more sunlight, which would reduce the solar radiation absorption rate and evaporation efficiency of the entire solar heat-absorbing evaporation pan 44; the evaporation pan temperature sensor 442 is located inside the solar heat-absorbing evaporation pan 44 and close to the bottom of the solar heat-absorbing evaporation pan 44, and is used to collect the bottom temperature signal inside the solar heat-absorbing evaporation pan 44 to control the operation of the solar evaporation urea recovery system.

[0045] like Figure 2 , Figure 3As shown, the solvent vapor concentration sensor 45 is a sensor located inside the solar evaporation and condensation chamber 4 for monitoring the real-time concentration of solvent 25 vapor; the solar evaporation and condensation chamber 4 has one or more solvent vapor concentration sensors 45 in different positions, which monitor the concentration of solvent 25 vapor in different areas inside the solar evaporation and condensation chamber 4, especially the concentration of solvent 25 vapor in the top of the solar evaporation and condensation chamber 4 and the liquid collection tank 43 of the evaporation and condensation chamber; when the solvent 25 is a high-concentration ethanol solution or anhydrous ethanol with a concentration of not less than 95%, the solvent vapor concentration sensor 45 is an alcohol gas concentration sensor; the evaporation and condensation chamber exhaust pipe 46 is a pipe used to discharge the small amount of ammonia gas generated in the solar evaporation and condensation chamber 4 due to the hydrolysis of urea generated in the solar evaporation and condensation chamber 4 by contact with the water in the solvent 25 or the water in the air; the gas collection pipe 461 of the evaporation and condensation chamber exhaust pipe 46 is a gas collection pipe connected to the exhaust holes at the top of each protruding part of the top of the solar evaporation and condensation chamber 4, used to collect multiple exhaust branches of ammonia gas with a density less than air in the solar evaporation and condensation chamber 4; the inlet of the exhaust valve 462... All gas collection pipes 461 converge at the gas inlet, and the outlet is connected to an exhaust pipe 463 of the evaporation and condensation chamber. This pipe controls the on / off switch and exhaust rate of the ammonia gas generated inside the solar evaporation and condensation chamber 4. When the solvent vapor concentration sensor 45 detects that the concentration of solvent 25 vapor inside the solar evaporation and condensation chamber 4 is below the limit, it opens the exhaust valve 462 of the exhaust pipe 46 of the evaporation and condensation chamber to complete the exhaust of ammonia gas from the solar evaporation and condensation chamber 4. The anti-negative pressure air inlet valve 47 of the evaporation and condensation chamber is used to introduce outside air into the solar evaporation and condensation chamber 4. The one-way air inlet valve prevents the negative pressure backflow effect generated inside the solar evaporation condensation chamber 4 during the exhaust process. In particular, when the ammonia gas discharged from the evaporation condensation chamber exhaust pipe 463 is sent into the exhaust irrigation water tank 8 and absorbed by the water to generate soluble ammonium nitrogen fertilizer required for plant growth, the negative pressure air inlet valve 47 of the evaporation condensation chamber is opened to avoid the formation of negative pressure inside the solar evaporation condensation chamber 4 during the ammonia gas exhaust process, which would backflow the water in the exhaust irrigation water tank 8, and also to prevent the primary condensation return pipe 63 from backflowing the solvent 25 remaining in the condensation solvent collection chamber 5.

[0046] like Figure 2 , Figure 3As shown, the evaporative condensation chamber 4's heat-insulating and sun-shading top cover and opening / closing mechanism 48 are located outside the transparent condensation structure 42, including: a top cover 481 and a top cover opening / closing mechanism 482; the top cover 481 has heat-insulating, sun-shading, and impact-resistant functions, and can be closed under the drive of the top cover opening / closing mechanism 482 to cover the transparent condensation structure 42, suppressing the evaporation and condensation of the solar evaporative condensation chamber 4 and protecting the transparent condensation structure 42, or opened under the drive of the top cover opening / closing mechanism 482 to expose the transparent condensation structure 42 to the outside, thereby enhancing the evaporation and condensation of the solar evaporative condensation chamber 4; furthermore, the top cover 481... The inner side of the cover 481 has a high reflectivity inner reflective surface 4811, and the sun-facing surface inside the solar evaporation and condensation chamber 4 also has a high reflectivity evaporation and condensation chamber sun-facing reflective surface 49. When the cover 481 is opened and the angle is adjusted, the inner reflective surface 4811 and the sun-facing reflective surface 49 of the evaporation and condensation chamber reflect sunlight onto the solar heat-absorbing evaporation plate 44, increasing the irradiance and improving the heat generation and evaporation efficiency of the solar heat-absorbing evaporation plate 44. In one specific embodiment, the inner reflective surface 4811 and the sun-facing reflective surface 49 of the evaporation and condensation chamber are mirror reflective surfaces with a reflectivity of not less than 0.9.

[0047] like Figure 2 , Figure 3 As shown, the outer enclosure structure 511 of the condensate collection chamber 5 is an enclosure structure with an opaque thermal insulation material layer to reduce heat transfer between the condensate collection chamber 5 and the outdoor environment; the bottom plate 512 of the condensate collection chamber is a bottom plate enclosure structure with an opaque thermal insulation material layer to reduce heat transfer between the condensate collection chamber 5 and the solvent chamber 2; the inter-chamber thermal insulation board 513 is an enclosure structure with an opaque thermal insulation material layer between the condensate collection chamber 5 and the dissolving chamber 3; the bottom of the condensate collection chamber 5 has a secondary condensate return pipe interface 52 for connecting the secondary condensate return pipe 64 leading to the solvent chamber 2; the cold... The airtight opening 53 of the condensate collection chamber is an opening with an airtight sealing strip on the top of the condensate collection chamber 5. The airtight opening 53 allows the outlet of the primary condensate return pipeline 63 to be inserted into it, allowing the evaporation condensation chamber collection tank 43 to discharge the condensed solvent 25 into the condensate collection chamber 5. The solvent 25 can also be replenished into the condensate collection chamber 5 through the open airtight opening 53. The replenished solvent 25 flows into the solvent chamber 2 to compensate for the solvent 25 loss after long-term operation of the solvent chamber 2. Closing the airtight opening 53 of the condensate collection chamber can prevent solvent 25 loss and heat loss caused by gas leakage from the condensate collection chamber 5.

[0048] like Figure 2 , Figure 3 As shown, the inlet of the primary delivery pipeline 61 in the liquid delivery and condensation return pipeline 6 is connected to the solvent tank pump 24 in the solvent tank 2, and the outlet is the dissolving tank replenishment port 611 for inputting the solvent 25 into the dissolving tank system 32 in the dissolving tank 3. The primary delivery pipeline 61 is used to deliver the solvent 25 in the solvent tank 2 to the dissolving tank 321 in the dissolving tank 3. The inlet of the secondary delivery pipeline 62 is connected to the dissolving tank pump 33 in the dissolving tank 3, and the outlet is the solar heat absorption evaporation plate in the solar evaporation condensation chamber 4. The urea solution 322 is fed into the evaporator plate replenishment port 621, which is used to transport the urea solution 322 in the dissolving tank 321 to the solar heat-absorbing evaporator plate 44 in the solar evaporation and condensation chamber 4; the inlet of the primary condensation reflux pipeline 63 is connected to the primary condensation reflux pipeline interface 431 at the bottom of the evaporation and condensation chamber collection tank 43 in the solar evaporation and condensation chamber 4, and the outlet has a primary pipeline outlet air-tight valve 631, which is inserted into the airtight opening 53 of the condensation solvent collection chamber 5, for collecting liquid in the evaporation and condensation chamber. The condensed solvent 25 collected in tank 43 flows into the condensate collection chamber 5 by gravity. Simultaneously, the primary pipeline outlet air-tight valve 631 purges air when the condensed solvent 25 returns to the condensate collection chamber 5, and seals the chamber when no solvent 25 flows in, preventing secondary evaporation loss and heat loss from air infiltration of the condensed solvent 25 within the condensate collection chamber 5. The inlet of the secondary condensate return pipeline 64 is connected to the secondary condensate return pipe at the bottom of the condensate collection chamber 5. The outlet of the flow pipe interface 52 is airtightly connected to the solvent chamber 2 via the condensation reflux pipe interface 23 on the solvent chamber 2. The outlet of the secondary condensation reflux pipe 64 has a secondary pipe outlet air-closing valve 641, which is used to allow the condensed solvent 25 collected in the condensation solvent collection chamber 5 to flow into the solvent chamber 2 by gravity. At the same time, it completes the air venting when the solvent 25 flows into the solvent chamber 2, and the air closure when no solvent 25 flows into the solvent chamber 2, to prevent the solvent 25 in the solvent chamber 2 from evaporation loss and air permeation heat loss.

[0049] like Figure 2 , Figure 3As shown, the evaporation control system 7 controls the start-up, shutdown, and operating power of the dissolving tank heating device 324, the solvent tank pump 24, and the dissolving tank pump 33 based on the temperature signal at the bottom of the solar heat-absorbing evaporation pan 44 collected by the evaporation pan temperature sensor 442, the solvent vapor concentration signal of the solvent 25 in the solar evaporation condensation chamber 4 collected by the solvent vapor concentration sensor 45, the temperature signal of the urea solution 322 in the dissolving tank 321 collected by the tank liquid temperature sensor 325, and the signal of the amount of urea solution 322 in the dissolving tank 321 collected by the tank liquid level sensor 326. This ensures that the solvent 25 in the dissolving tank 321 is in a state of efficient urea dissolution and reduced [temperature / volume]. Within a temperature range with minimal evaporation loss, the amount of solvent 25 input from the solvent chamber 2 to the dissolving tank 321, the amount of urea solution 322 generated in the dissolving tank 321, and the amount of urea solution 322 input to the solar heat-absorbing evaporation plate 44 are matched with the amount of urea solution 322 evaporating in the solar evaporation condensation chamber 4; and the evaporation control system 7 can issue an alarm signal for overheating of the solar evaporation condensation chamber 4 to remind the user to close the top cover 481, or automatically activate the top cover opening and closing mechanism 482 to close the top cover 481; when the temperature of the bottom of the solar heat-absorbing evaporation plate 44 collected by the evaporation plate temperature sensor 442 is higher than the boiling point temperature of the solvent 25, it indicates that the solar heat-absorbing evaporation plate is not evaporating properly. When the urea solution 322 in the solar evaporation plate 44 evaporates to dryness, the evaporation control system 7 starts the dissolving chamber pump 33 to quantitatively replenish the urea solution 322 into the solar evaporation plate 44, not exceeding the volume of the solar evaporation plate 44. When the liquid level sensor 326 in the dissolving tank system 32 collects the lower limit signal of the liquid level in the dissolving tank 321, it indicates that the amount of urea solution 322 in the dissolving chamber 3 is insufficient. The evaporation control system 7 starts the solvent chamber pump 24 to replenish the solvent 25 into the dissolving tank 321 in the dissolving chamber 3 until the liquid level sensor 326 collects the upper limit signal of the liquid level in the dissolving tank 321. At this point, the evaporation control system 7 stops the solvent chamber pump 24. The operation is as follows: When the temperature of the urea solution 322 in the dissolving tank 321, as collected by the liquid temperature sensor 325, is too low, the evaporation control system 7 controls the electric heating device 324 of the dissolving tank to start and operate intermittently, thereby raising the temperature of the urea solution 322 in the dissolving tank 321; the evaporation control system 7 controls the temperature of the urea solution 322 in the dissolving tank 321 to be within the temperature range where the solvent 25 can efficiently dissolve urea and reduce evaporation loss; in one specific embodiment, when the solvent 25 is a high-concentration ethanol solution or anhydrous ethanol with a concentration of not less than 95%, the evaporation control system 7 controls the temperature of the urea solution 322 in the dissolving tank 321 to be between 60°C and 75°C.When the total amount of urea in the thin felt 1 containing residual solids from urine evaporation corresponds to the total amount of urea solution 322, all of which is generated by the dissolving tank system 32 and sent to the solar heat-absorbing evaporation plate 44 for evaporation, and the temperature at the bottom of the solar heat-absorbing evaporation plate 44, as collected by the evaporation plate temperature sensor 442, exceeds the boiling point of the solvent 25 and gradually rises to nearly 100°C, the evaporation control system 7 issues different levels of alarm signals according to the temperature level, reminding the user to close the heat-insulating and sun-shading top cover of the evaporation condensation chamber and the top cover 481 in the opening and closing mechanism 48, or automatically activate the top cover opening and closing mechanism 482 to close the top cover 481, to prevent the solar evaporation condensation chamber 4 from overheating, and to prevent the urea generated in the solar evaporation condensation chamber 4 from undergoing a condensation reaction that generates biuret, which is harmful to plants, after exceeding the urea melting point of 133°C.

[0050] like Figure 1 , Figure 4As shown, the exhaust irrigation water tank 8 is used to store water and generate irrigation water containing soluble fertilizer for plants. When the water volume in the exhaust irrigation water tank 8 is insufficient, water is added through the water tank water and fertilizer inlet 86 as irrigation water 87. The water tank water and fertilizer inlet 86 also adds water-soluble solute 444 collected in the solar heat absorption evaporation plate 44, which precipitates out of the evaporation plate, as effectively desalinated urea solid fertilizer to the irrigation water 87. Simultaneously, the exhaust irrigation water tank 8 also acts as a treatment device for the odorous ammonia gas discharged from the solar evaporation condensation chamber 4 due to the heating and hydrolysis of urea. The irrigation water 87 absorbs the ammonia gas, generating soluble ammonium nitrogen fertilizer that can be absorbed by plants. The outer enclosure structure 811 of the air-cooled irrigation water tank insulation structure 81 is an enclosure structure with an opaque insulation material layer to reduce heat transfer between the air-cooled irrigation water tank 8 and the outdoor environment; the water tank bottom plate 812 is a bottom plate enclosure structure with an opaque insulation material layer, which is integrated with the top plate 912 of the planting cabinet to form an integrated greening planting module with the air-cooled irrigation water tank 8 on top and the planting cabinet 9 below, which is easy to combine with ecological architecture; the water tank seepage-proof and corrosion-resistant inner lining 82 is a stainless steel or organic polymer material lining that can withstand the corrosion of aqueous solutions containing weakly acidic or weakly alkaline water-soluble fertilizers; the evaporation condensation chamber exhaust pipe interface and the submerged exhaust pipe 83 are... The exhaust irrigation water tank 8 has an airtight vent interface connected to the evaporation condensation chamber exhaust pipe 463 leading from the solar evaporation condensation chamber 4 and the internal exhaust pipe of the water tank. The evaporation condensation chamber exhaust pipe interface 831 is airtightly sealed at the tank wall of the exhaust irrigation water tank 8 and is connected to a subsurface exhaust pipe 832 that extends below the surface of the irrigation water 87 inside the exhaust irrigation water tank 8 for venting. This allows the ammonia-containing gas flow from the solar evaporation condensation chamber 4 to be completely sent into the exhaust irrigation water tank 8 through the evaporation condensation chamber exhaust pipe 463, and then sent into the depth of the water body below the surface of the irrigation water 87 through the subsurface exhaust pipe 832. The system vents the water to allow the water-soluble ammonia to be fully absorbed by the irrigation water 87. The vent pipe and filter 84 on the top of the water tank 8 are located at the top of the vented irrigation water tank 8, maintaining an air gap between them and the surface of the irrigation water 87. This air gap is used to discharge the airflow that has been absorbed and had its soluble odor removed by the water layer of the irrigation water 87 to the outside atmosphere. The filter further removes the odor from the exhaust gas through its filtration and adsorption properties, and maintains the vented irrigation water tank 8 at normal pressure. The drip irrigation pipe connector and switch valve 85 are used to connect to the drip irrigation system 95 in the planting cabinet 9, using the irrigation water 87 in the vented irrigation water tank 8 for plant irrigation, and controlling the switching on and off of the drip irrigation system 95.

[0051] like Figure 1 , Figure 4As shown, the outer enclosure structure 911 of the heat-insulating enclosure structure 91 of the planting cabinet is an enclosure structure with an opaque heat-insulating material layer to reduce heat transfer between the planting cabinet 9 and the outdoor environment; the transparent heat-insulating enclosure structure 92 of the planting cabinet is located on the sun-facing facade of the planting cabinet 9, allowing solar radiation to pass through easily while possessing heat insulation and airtightness; the transparent heat-insulating enclosure structure 92 and the heat-insulating enclosure structure 91 of the planting cabinet enclose a heat-insulating and airtight space, enabling the planting cabinet 9 to be insulated and airtight during winter. Passive solar heating can be achieved by utilizing solar radiation transmission, as well as the heat absorption and storage of the planting trough and planting medium 94. The transparent insulated enclosure structure 92 of the planting cabinet has an openable fan 921, which allows for routine maintenance and harvesting of the planted plants 96. The retractable and adjustable external shading 93 is located on the outside of the transparent insulated enclosure structure 92 of the planting cabinet and is used to control the irradiance of solar radiation reaching the outer surface of the transparent insulated enclosure structure 92 of the planting cabinet, preventing excessive heat buildup inside the planting cabinet 96 in summer. Heat; the planting trough 941 is a container for holding the planting medium 942, and its main body material is a dark-colored solar radiation heat-absorbing and heat-storing material, or its main body is a heat-storing material with a dark-colored solar radiation heat-absorbing coating on the sun-facing side, so as to facilitate passive solar heating in winter; the planting medium 942 is a loose, porous, water-retaining and breathable inorganic or organic solid planting medium or hydroponic nutrient solution medium used for plant planting; when the planting medium 942 is solid, it is integrated with a drip irrigation system 95 for plant irrigation; one specific embodiment The plant 96 is a small-volume productive or ornamental plant that efficiently absorbs the irrigation water 87 and transpires efficiently. The effectively desalinated urea solid fertilizer and ammonia gas generated in the solar evaporation condensation chamber 4 dissolve in the exhaust irrigation water tank 8 to generate irrigation water 87 containing soluble fertilizer, which is used to irrigate the plant 96. The plant 96 continuously consumes the irrigation water 87 through absorption and transpiring, which not only achieves low-energy harmless treatment and resource recycling of residual solids from urine evaporation, but also provides ecological landscape and agricultural planting benefits.

[0052] The above description of the embodiments and specific implementations of the present invention does not exclude the existence of other embodiments and specific implementations that are consistent with the main content of the present invention and are similar to the principles of the present invention; embodiments with some or all of the features that are similar to the present invention are also within the protection scope of the present invention.

Claims

1. A solar-powered urea evaporation and recovery system, comprising: A new energy power supply system; characterized by: a thin felt containing residual solids from urine evaporation, a solvent chamber, a dissolving chamber, a solar evaporation and condensation chamber, a condensate collection chamber, liquid transport and condensate return pipelines, and an evaporation control system; and also includes an exhaust irrigation tank and a planting cabinet; the new energy power supply system includes: a photovoltaic power generation system and / or a wind power generation system, and an energy storage system; the thin felt containing residual solids from urine evaporation is a thin layer of fibrous or sponge-like porous absorbent material that absorbs urine, evaporates to dryness, and loses moisture, causing dissolved substances in the urine to precipitate out, becoming residual solids adhering to the thin felt; the solvent chamber is a chamber for storing solvents, containing solvents whose solubility for urea at the same temperature is significantly greater than their solubility for inorganic salts in the residual solids from urine evaporation; the dissolving chamber is... The system includes a dissolving device and a controllable thermal environment, enabling the solvent to efficiently dissolve urea in a thin felt containing residual solids from urine evaporation under normal pressure, generating a urea solution. The dissolving chamber contains the thin felt containing residual solids from urine evaporation during operation. The solar-powered evaporation-condensation chamber utilizes solar energy to heat the urea solution, causing the solvent vapor to evaporate and urea to precipitate, and then collects the condensed solvent vapor. The condensate collection chamber collects the condensed solvent generated in the solar-powered evaporation-condensation chamber. The liquid delivery and condensate return pipelines are used to deliver the solvent to the dissolving chamber, deliver the urea solution to the solar-powered evaporation-condensation chamber, and return the condensed solvent to the condensate collection chamber. The solvent chamber piping; the evaporation control system is the control system for the operation of the solar evaporation urea recovery and utilization system; the exhaust irrigation water tank is used for water storage and for dissolving the urea solid fertilizer and ammonia generated by the solar evaporation condensation chamber to generate plant irrigation water containing soluble fertilizer; the planting cabinet is a greening planting device for three-dimensional planting of plants in a limited space; during the operation of the solar evaporation urea recovery and utilization system, the solvent is sent into the dissolution chamber, and under normal pressure and temperature conditions, the urea in the thin felt containing the residual solids of urea evaporation is dissolved, leaving the inorganic salts therein, forming a urea solution containing the solvent and urea; then the urea solution is sent into the solar evaporation condensation chamber for evaporation, so that the solvent becomes To separate the solvent vapor from the urea in the urea solution, the solvent vapor is condensed back into liquid and sent to the condensate solvent collection chamber, and then returned to the solvent chamber for recycling. The urea in the urea solution sent to the solar evaporation condensation chamber precipitates as effectively desalted urea solid fertilizer. During operation, the solvent, the urea solution, and the condensed solvent flow through the liquid transport and condensation return pipelines, controlled by the evaporation control system, achieving low-energy operation of the solar evaporation urea recovery system. Driven entirely by green electricity from a new energy power supply system, the system recycles the solvent to recover urea from the thin felt containing residual solids from urea evaporation in the dissolving chamber as effectively desalted urea solid fertilizer in the solar evaporation condensation chamber.After the effectively desalinated urea solid fertilizer is collected, it is added to the exhaust irrigation tank for complete dissolution. Ammonia gas generated in the solar evaporation condensation chamber is also sent to the exhaust irrigation tank for full absorption, making the water in the exhaust irrigation tank contain effectively desalinated soluble fertilizer, which can be applied to the plants in the planting cabinet for a long period.

2. The solar-powered urea evaporation and recovery system according to claim 1, characterized in that: The solvent is an organic solvent with a boiling point above 50°C and below 100°C at normal pressure, which readily or can dissolve urea under the same temperature conditions, but is slightly soluble, or difficult to dissolve or does not dissolve inorganic salts in the residual solids of urine evaporation; furthermore, the solvent is a high-concentration ethanol solution or anhydrous ethanol with a concentration of not less than 95%, and does not exceed the methanol content limit specified for pharmaceutical / food grade ethanol.

3. The solar-powered urea evaporation and recovery system according to claim 1, characterized in that... The solvent chamber includes: a solvent chamber thermal insulation enclosure structure, a solvent seepage-proof and corrosion-resistant inner lining, a condensate return pipe interface, a solvent chamber pump, and solvent; wherein the solvent chamber thermal insulation enclosure structure includes: an outer enclosure structure and a solvent chamber top plate; furthermore, the outer enclosure structure of the solvent chamber thermal insulation enclosure structure has a solvent chamber phase change heat storage material layer close to the inner side of the chamber; the dissolution chamber includes: a dissolution chamber thermal insulation enclosure structure, a dissolution tank system, a dissolution chamber pump, and a dissolution chamber airtight opening; the dissolution chamber thermal insulation enclosure structure includes: an outer enclosure structure and a dissolution chamber bottom plate; the dissolution chamber airtight opening is an opening located at the top of the dissolution chamber with an airtight sealing strip; the solar evaporation condensation chamber includes: an evaporation condensation chamber thermal insulation enclosure structure, a transparent... The solar evaporation and condensation chamber comprises a transparent condensation structure, an evaporation and condensation chamber liquid collection tank, and a solar-heat-absorbing evaporation plate. The thermal insulation enclosure of the evaporation and condensation chamber includes an outer enclosure structure and a bottom plate. The liquid collection tank, located inside the solar evaporation and condensation chamber, is a trough-shaped container used to collect condensed solvent droplets falling from the transparent condensation structure. The bottom of the liquid collection tank has a primary condensation reflux pipe interface. A sunshade on the shaded side of the solar evaporation and condensation chamber provides shade for the liquid collection tank. The condensation solvent collection chamber includes a thermal insulation enclosure, a secondary condensation reflux pipe interface, and an airtight opening. The thermal enclosure structure includes: an outer enclosure structure, a bottom plate of the condensate collection chamber, and an inter-chamber thermal insulation panel; the inter-chamber thermal insulation panel is an enclosure structure with an opaque thermal insulation material layer between the condensate collection chamber and the dissolving chamber; the bottom of the condensate collection chamber has a secondary condensate return pipe interface; the airtight opening of the condensate collection chamber is an opening with an airtight sealing strip at the top of the condensate collection chamber; the liquid delivery and condensate return pipeline includes: a primary delivery pipeline, a secondary delivery pipeline, a primary condensate return pipeline, and a secondary condensate return pipeline; the inlet of the primary delivery pipeline is connected to the solvent tank pump in the solvent chamber, and the outlet is a dissolving tank replenishment port for inputting the solvent into the dissolving tank system in the dissolving chamber. The inlet of the secondary delivery pipeline is connected to the dissolution chamber pump in the dissolution chamber, and the outlet is the liquid replenishment port for the evaporation plate that inputs the urea solution into the solar heat absorption evaporation plate in the solar evaporation and condensation chamber; the inlet of the primary condensation reflux pipeline is connected to the primary condensation reflux pipe interface at the bottom of the evaporation and condensation chamber collection tank in the solar evaporation and condensation chamber, and the outlet has a primary pipeline outlet shut-off valve and is inserted into the airtight opening of the condensation solvent collection chamber; the inlet of the secondary condensation reflux pipeline is connected to the secondary condensation reflux pipe interface at the bottom of the condensation solvent collection chamber, and the outlet is airtightly connected to the solvent chamber through the condensation reflux pipe interface on the solvent chamber, and the outlet of the secondary condensation reflux pipeline has a secondary pipeline outlet shut-off valve.The thin felt containing residual solids from urine evaporation, solvent chamber, dissolving chamber, solar evaporation and condensation chamber, condensate collection chamber, liquid delivery and condensate return pipeline, and evaporation control system are combined into an integrated urea recovery system module, employing a combined upper, middle, and lower chamber layout. The solvent chamber is located at the lower part of the urea recovery system module; the solar evaporation and condensation chamber is located at the upper part of the urea recovery system module and faces the sun, allowing it to receive solar radiation; the condensate collection chamber is located in the middle of the urea recovery system module, connected to the solar evaporation and condensation chamber above it via a primary condensate return pipeline, and connected to the solvent chamber below it via a secondary condensate return pipeline; the dissolving chamber is located in the middle of the urea recovery system module, connected to the solar evaporation and condensation chamber above it via a primary condensate return pipeline. The delivery pipeline connects to the solvent chamber located below the dissolving chamber, and is connected to the solar evaporation and condensation chamber located above the dissolving chamber via the secondary delivery pipeline; the bottom plate of the dissolving chamber and the top plate of the solvent chamber are combined, and the bottom plate of the condensation solvent collection chamber and the top plate of the solvent chamber are also combined; the solar evaporation and condensation chamber is a movable part of the urea recovery system module. The bottom plate of the evaporation and condensation chamber can be moved away from the top of the dissolving chamber and the condensation solvent collection chamber by translation and / or rotation, exposing and opening the airtight openings of both the dissolving chamber and the condensation solvent collection chamber, and can also be moved back to the state of pressing against the top of the dissolving chamber and the condensation solvent collection chamber, closing and maintaining the airtightness of both openings.

4. A solar-powered urea evaporation and recovery system according to claims 1 and 3, characterized in that: The dissolving tank system is located inside the dissolving chamber and is used to contain the solvent and the thin felt containing the residual solids from urine evaporation, and to keep the thin felt containing the residual solids from urine evaporation in a wetted state to generate a urea solution, and to maintain an atmospheric pressure thermal environment for efficient dissolution of urea by the solvent, and to control the amount of solvent input from the solvent chamber and the amount of urea solution output from the solar evaporation and condensation chamber. The dissolving tank system includes: a dissolving tank, a urea solution, a thin felt support, a dissolving tank heating device, a liquid temperature sensor inside the tank, and a liquid level sensor inside the tank. The dissolving tank is a flat-bottomed storage tank-shaped container located inside the dissolving chamber, used to hold the solvent and the thin felt containing residual solids from urine evaporation. The dissolving tank has a thin felt support for supporting and fixing the unfolded thin felt containing residual solids from urine evaporation. The dissolving tank heating device is used to heat the urea solution stored in the dissolving tank. The liquid temperature sensor inside the tank is used to collect the temperature signal of the urea solution in the dissolving tank. The dissolving tank heating device and the liquid temperature sensor work together to maintain the solvent in the dissolving tank within a temperature range that efficiently dissolves urea and reduces evaporation loss. The liquid level sensor inside the tank is used to collect the signal indicating the amount of urea solution in the dissolving tank.

5. A solar-powered urea evaporation and recovery system according to claim 3, characterized in that: The transparent condensation structure is located on the sun-facing side of the top of the solar evaporation condensation chamber. It is composed of an airtight transparent material layer that allows solar radiation to pass through and has good heat transfer, along with its supporting structure and accessories. The transparent condensation structure has a condensation interface for the solvent vapor, which is the inner surface of the material layer in the solar evaporation condensation chamber where the solvent vapor simultaneously contacts the outside air. Further, the transparent condensation structure employs a folded plate or folded film transparent condensation structure, including: a folded plate or folded film support, a transparent plastic sheet or film, drip lines, transparent guide channels, and transparent condensation structure fasteners. The folded plate or folded film transparent condensation structure is formed by multiple narrow, elongated transparent plastic sheets or films intersecting or bending to create multiple ridges and valleys spaced apart. The arrangement comprises an airtight, transparent, thin-walled space enclosure structure; the intersection of the cross-section of the ridge or valley line perpendicular to the transparent condensation structure of the folded plate or membrane with the transparent condensation structure surface inside the solar evaporation and condensation chamber forms a continuously undulating zigzag line or curve; the ratio of the unfolded area of ​​the condensation interface obtained by fully unfolding all the continuously bent condensation interfaces of the folded plate or membrane transparent condensation structure onto a horizontal plane to the horizontal projected area of ​​the solar evaporation and condensation chamber is not less than 1.4 and not greater than 60; the folded plate or membrane support consists of multiple sets of support surfaces at different elevations and having continuously undulating zigzag lines or curves, used to attach and fix multiple narrow transparent plastic sheets or films along the support surfaces; the transparent plastic sheets or films have a light transmittance of not less than 0.75° airtight transparent plastic sheet or transparent plastic film; the material of the transparent plastic sheet or film has a contact angle with the solvent greater than or equal to 60 degrees, or the material layer of the transparent plastic sheet or film has a superhydrophobic coating of the solvent on the condensation interface inside the solar evaporation and condensation chamber; the drip line is a structure with a sharp protruding edge on the condensation interface of the folded plate or folded film transparent condensation structure, or with an edge formed by a sharp change in curvature at the valley line on the condensation interface, used to allow the condensed solvent droplets converging on the condensation interface to drip; the transparent guide channel is made of transparent material, located vertically below the location of the drip line, collecting the droplets dripping from the drip line and guiding them to the liquid collection tank of the evaporation and condensation chamber inside the solar evaporation and condensation chamber; the material of the transparent guide channel has a contact angle with the solvent greater than or equal to 60 degrees, or the material layer of the transparent plastic sheet or film has a superhydrophobic coating of the solvent on the condensation interface inside the solar evaporation and condensation chamber. The transparent flow channel surface has a superhydrophobic coating on the solvent; the transparent condensation structure fasteners are used to secure the transparent condensation structure to the solar evaporation condensation chamber with bolts, clips, or magnetic attachments, forming an airtight interface without air leakage; the transparent condensation structure fasteners are removable to facilitate periodic maintenance of the internal components of the solar evaporation condensation chamber, especially periodic cleaning of the solar heat-absorbing evaporation plate and collection of the solute precipitated from the urea solution within the solar heat-absorbing evaporation plate; furthermore, the folded plate or folded film transparent condensation structure also has transparent heat transfer ribs; the transparent heat transfer ribs are openings on the transparent plastic sheet or film that allow the solvent vapor to flow in and the condensed solvent to flow out, and the openings connect to an airtight cavity enclosed by a transparent plastic sheet or film protruding outwards from the solar evaporation condensation chamber, having an enlarged condensation interface.

6. The solar-powered urea evaporation and recovery system according to claim 3, characterized in that: The solar heat absorption evaporation plate is installed on the bottom plate of the evaporation and condensation chamber inside the solar evaporation and condensation chamber. It is used to hold the urea solution from the dissolving chamber and make it flow and spread into a thin liquid layer. It is a shallow, flat-bottomed dish with a dark-colored material with high solar radiation absorption rate. The solar-powered evaporator includes a heat-absorbing and heat-conducting grid and an evaporator temperature sensor. The heat-absorbing and heat-conducting grid is installed on the solar-powered evaporator and is in contact with the solution inside the evaporator. It consists of multiple parallel and spaced grid plates made of a dark-colored surface material with high solar radiation absorptivity and a metal body material with high thermal conductivity. The lower part of each grid plate is immersed in the solution inside the evaporator, while the upper part is exposed above the liquid surface. During typical sunshine periods throughout the year, the grid plates maintain a spacing without significant shading, ensuring that the bottom of the solar-powered evaporator and the heat-absorbing and heat-conducting grid receive sufficient sunlight. The evaporator temperature sensor is located inside the solar-powered evaporator and close to the bottom of the evaporator, and is used to collect the temperature signal of the bottom of the solar-powered evaporator.

7. A solar-powered urea evaporation and recovery system according to claim 3, characterized in that: The solar evaporation and condensation chamber further includes: a solvent vapor concentration sensor, an evaporation and condensation chamber exhaust pipe, and an anti-negative pressure inlet valve for the evaporation and condensation chamber; the evaporation and condensation chamber exhaust pipe includes: a gas collecting pipe, an exhaust valve, and an evaporation and condensation chamber exhaust pipe; the solvent vapor concentration sensor is a sensor located inside the solar evaporation and condensation chamber used to monitor the real-time concentration of the solvent vapor; the solar evaporation and condensation chamber has one or more solvent vapor concentration sensors located in different positions; the evaporation and condensation chamber exhaust pipe is used to discharge the small amount of ammonia gas generated by the hot hydrolysis of urea produced in the solar evaporation and condensation chamber; the gas collecting pipe is connected to the top of the solar evaporation and condensation chamber. The exhaust holes at the top of each protruding part are used to collect multiple exhaust branches of ammonia gas in the solar evaporation and condensation chamber; the inlet of the exhaust valve collects all the gas collection pipes, and the outlet is connected to an exhaust pipe of the evaporation and condensation chamber, which is used to control the on / off switch and exhaust rate of ammonia gas in the solar evaporation and condensation chamber; when the solvent vapor concentration sensor detects that the solvent vapor concentration in the solar evaporation and condensation chamber is lower than the limit, the exhaust valve is opened to complete the exhaust of ammonia gas in the solar evaporation and condensation chamber; the anti-negative pressure air inlet valve of the evaporation and condensation chamber is a one-way air inlet valve that introduces outside air into the solar evaporation and condensation chamber during the exhaust process.

8. A solar-powered urea evaporation and recovery system according to claims 1 and 3, characterized in that... The solar evaporation and condensation chamber further includes: an insulated and sun-shading top cover and an opening and closing mechanism; the insulated and sun-shading top cover and opening and closing mechanism are located outside the transparent condensation structure, and include: a top cover and a top cover opening and closing mechanism; the top cover has heat insulation, sun shading, and impact resistance functions, and can be closed under the drive of the top cover opening and closing mechanism to cover the transparent condensation structure, inhibiting the evaporation and condensation process of the solar evaporation and condensation chamber and protecting the transparent condensation structure, or can be opened under the drive of the top cover opening and closing mechanism to expose the transparent condensation structure to the outdoor environment, allowing the solar energy... The evaporative condensation chamber enhances the evaporation and condensation process. Furthermore, the inner side of the top cover has a high-reflectivity inner reflective surface, and the sun-facing surface inside the solar evaporative condensation chamber also has a high-reflectivity sun-facing reflective surface. When the top cover is opened and adjusted to an appropriate angle, the inner reflective surface of the top cover and the sun-facing reflective surface of the evaporative condensation chamber reflect sunlight onto the solar heat-absorbing evaporation plate. The evaporation control system can issue an overheating alarm signal for the solar evaporative condensation chamber to remind the user to close the top cover, or automatically activate the top cover opening and closing mechanism to close the top cover.

9. A solar-powered urea evaporation and recovery system according to claims 1 and 7, characterized in that: The exhaust irrigation water tank includes: an insulated and heat-insulating enclosure structure, a seepage-proof and corrosion-resistant inner lining, an evaporation and condensation chamber exhaust pipe interface and a submerged exhaust pipe, a top exhaust pipe and filter, a drip irrigation pipeline connector and switch valve, a water and fertilizer inlet, and irrigation water; the insulated and heat-insulating enclosure structure includes: an outer enclosure structure and a bottom plate; the planting cabinet includes: an insulated and heat-insulating enclosure structure, a transparent insulated enclosure structure, an adjustable external shading unit, a planting trough and planting medium, and a drip irrigation system; the insulated and heat-insulating enclosure structure includes: an outer enclosure structure and a top plate; The planting cabinet has an openable fan on its transparent insulated enclosure structure; the evaporative condensation chamber exhaust pipe interface and the subsurface exhaust pipe are airtight venting interfaces on the evaporative condensation chamber exhaust pipe connected to the internal exhaust pipe of the water tank; the evaporative condensation chamber exhaust pipe interface is airtightly sealed at the wall of the water tank and connected to a subsurface exhaust pipe that extends below the surface of the irrigation water inside the water tank for venting; the water tank top exhaust pipe and filter are located at the top of the water tank, maintaining an air gap between them and the irrigation water surface; the water tank drip irrigation pipe connector and switch valve are used for... The drip irrigation system is connected to the planting cabinet; the transparent insulated enclosure structure of the planting cabinet is located on the sun-facing side of the planting cabinet, allowing easy transmission of solar radiation while providing insulation and airtightness; the transparent insulated enclosure structure and the insulated enclosure structure of the planting cabinet form an insulated and airtight space, allowing the planting cabinet to utilize solar radiation transmission, as well as the heat absorption and storage of the planting trough and planting medium, to achieve passive solar heating in winter; the retractable and adjustable external shading is located on the outdoor side of the transparent insulated enclosure structure of the planting cabinet; the planting trough is a container for holding the planting medium, and its body material is... The material is a dark-colored solar radiation heat-absorbing and heat-storing material, or its body is a heat-storing material with a dark-colored solar radiation heat-absorbing coating on the sun-facing side, to facilitate passive solar heating in winter; the planting medium is a loose, porous, water-retaining, and breathable inorganic or organic solid planting medium or hydroponic nutrient solution medium used for plant cultivation; when the planting medium is solid, it integrates a drip irrigation system; the exhaust irrigation water tank and the planting cabinet are combined into an integrated greening planting module; in the greening planting module, the exhaust irrigation water tank is on top, the planting cabinet is below, and the bottom plate of the exhaust irrigation water tank and the top plate of the planting cabinet are integrated.

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