1216results about How to "Improve evaporation efficiency" patented technology

This invention provides methods and compositions to preserve bioactive materials in a matrix of powder particles. Methods provide high-pressure gas spraying and / or near supercritical spraying of formulations followed by drying in a stream of conditioned gas to form stable powder particles containing bioactive materials.

The invention relates to the technical filed of manufacturing of display devices and discloses evaporation equipment. The equipment is capable of realizing the continuous evaporation, increasing the production efficiency and reducing the production cost. The evaporation equipment comprises an evaporation chamber, a replacement chamber, a valve, vacuum-pumping equipment and control equipment, wherein a crucible replacing plate capable of containing a crucible, a clamp and at least one evaporation device for heating the crucible are arranged in the evaporation chamber; a crucible replacing plate capable of containing the crucible is arranged in the replacement chamber; the valve is used for communicating or isolating the evaporation chamber and the replacement chamber; the vacuum-pumping equipment is used for carrying out vacuum pumping on the replacement chamber; the control equipment is used for controlling the clamp to clamp the crucible to change the position between the evaporation position and the crucible replacing plate in the evaporation chamber and clamp the crucible replacing plate to change the position between the evaporation chamber and the replacement chamber when the valve is opened. By means of the evaporation equipment, cooling or vacuum breaking is not needed when evaporation materials are added in the evaporation chamber, so that the evaporation equipment is capable of carrying out the continuous evaporation, greatly increasing the production efficiency and reducing the production cost.

The invention relates to a PVA hydrogel-based photo-thermal evaporation material and preparation and application thereof. The preparation method comprises the following steps: step 1, respectively preparing an aqueous polyvinyl alcohol (PVA) solution, an aqueous nanometer photo-thermal material dispersion solution, an aqueous glutaraldehyde solution and a low-concentration hydrochloric acid solution; 2, fully mixing and stirring the aqueous PVA solution, the aqueous nanometer photo-thermal material dispersion solution, the aqueous glutaraldehyde solution and the low-concentration hydrochloricacid solution in the step 1 according to a certain sequence under a certain temperature condition; and 3, transferring the mixed and stirred product into a forming mold when the mixed and stirred product is not cured, and carrying out standing until a cross-linking reaction is complete, thereby obtaining the hydrogel material. The preparation method disclosed by the invention has the beneficial effects that preparation process is environment-friendly, pollution-free, simple and feasible; preparation cost is low; the obtained hydrogel can be used as an ideal photo-thermal evaporation and solarseawater desalination material; and the prepared hydrogel has high light absorption efficiency, photo-thermal conversion efficiency and evaporation efficiency, and can be applied to the field of solarseawater desalination.

The invention provides an energy-saving evaporation treatment process of high-salinity wastewater. The energy-saving evaporation treatment process comprises an evaporating system, a concentrating system, a drying system and a heat circulating system. Grading preheating, heating evaporation, adsorption purification, concentration, adsorption purification and high-temperature drying are successively carried out on the high-salinity wastewater treated by a wastewater treatment system to obtain the finished product of inorganic salt, heat exhausted in the evaporation, concentration and drying processes is recycled, and wastewater is discharged. By adopting the technical scheme, wastewater discharged finally meets the national industrial wastewater discharge standard, the purity of the obtained inorganic salt is as high as 99.3%, and the energy-saving effect is remarkable.

The invention discloses a salt-containing high concentrated organic wastewater treatment device and method in technical field of wastewater treatment. The high concentrated organic wastewater treatment device comprises a separation precipitation tank, an inner cavity of the separation sedimentation tank is provided with a precipitation auxiliary component, the left and right inner walls of an evaporation tank component are symmetrically provided with heating radiant tubes, the other end of a condenser pipe penetrates through the right side at the bottom of the condensing tank and is connectedwith a central part of the top of a neutralization filtration tank, the top of the inner chamber of the neutralization filtration tank is provided with a mixing box, and the inner chamber of the neutralization filtration tank is provided with an activated carbon filter net obliquely; the treatment device has a good treatment effect and high purification quality; the wastewater is placed in the separation precipitation tank for precipitation, the precipitated wastewater enters the evaporation tank component and is heated at a high temperature by the heating radiant tubes to complete the sewageand salt separation, the water vapor passes through the condensing tank, the condenser pipe and the ice bag cooperate with each other, so that the steam is cooled to form water and then enters the mixing box, then the rotating rod is driven by the stirring motor to perform neutralization stirring, and finally the wastewater is filtered.

The invention relates to a waste acid concentration multistage treatment method which comprises the following steps of: heating 20-22% waste acid by a preheater, evaporating by a one-effect evaporation heater and a double-effect evaporation heater, cooling by a cooler and crystallizing by a crystallizer; heating by a triple-effect evaporation heater and separating by a separator to obtain 65% concentrated acid. The secondary steam part is used as a heat source part of the next stage heater and is condensed by spraying cooling water, wherein the one-effect evaporation heater and the double-effect evaporation heater are falling film graphite tube array evaporation heaters; the triple-effect evaporation heater is a floating head tube array graphite heat exchange. The water evaporation capability of the method is increased from 2.5 tons to 10 tons, and the stage number is 3 or more. A large amount of steam and cooling water is saved, and the pollution to the environment is reduced. The heat exchange area of equipment is reduced by 30%, and materials are saved and manufacturing cost is reduced correspondingly. The heat of steam is fully utilized, more than 35% of steam is saved, and more than 30% of cooling water can be saved. The condensed water part of the steam is used as the hear source part of the preheater and is recycled for other uses.

The invention relates to a mobile type indoor disinfectant vapor disinfection system, which comprises a disinfectant vapor generation device, a wireless intelligent control system, a power-driven device, an environmental monitoring device, an air supply device, a mobile device and a disinfectant storage device. The disinfectant vapor generation device comprises a disinfectant vapor three-level refinement system, a filtering and catalyzing integrated system and a vapor generation control device; the air supply device supplies secondary power for scattering vapor in a space; and the wireless intelligent control system is communicated with the environmental monitoring device, the air supply device and the power-driven device so as to finish the operations of controlling the disinfectant vapor generation device, acquiring environmental parameters, and switching on / off the air supply device and the power-driven device in a disinfection target. The mobile type indoor disinfectant vapor disinfection system can intelligently, comprehensively and efficiently finish the disinfection operation of a closed space of large-sized equipment and is particularly suitable for the disinfection operation of a closed space with long and narrow passages, so that the mobile type indoor disinfectant vapor disinfection system has the advantages of strong maneuverability, high disinfection efficiency, no secondary pollution, and the like.

The invention discloses a repairing system and method for heavy metal-organic combined polluted soil and underground water. The repairing system comprises an electric repairing system, a resistance heating system, a soil gas-phase extraction system, an extracted gas phase treatment system and a system switchover system. The electric repairing system comprises a positive electrode and a negative electrode connected with a direct current power source, and the positive electrode and the negative electrode are arranged in a positive electrode electrolytic cell and a negative electrode electrolytic cell respectively. The resistance heating system comprises a positive electrode and a negative electrode connected with an alternating current power source. The system switchover system comprises a control device which controls the switching-on and off of a first switch and a second switch through a temperature detector probe. According to the repairing system, the electrodes are applied to the resistance heating system and the electric repairing system, effective combination and unification of the electric repairing technology and the heat treatment technology are achieved, equipment of the system is simplified, the repairing effect is enhanced, and the removal efficiency is improved.

The invention relates to the technical field of evaporation and discloses an evaporation crucible and evaporation equipment in order to increase the utilization rate of evaporation materials and improve the evaporation efficiency. The evaporation crucible comprises a crucible body and a crucible opening communicated with the crucible body, wherein multiple inert gas introduction nozzles are distributed on the side wall of the crucible opening. The evaporation crucible is applied to the evaporation equipment, inert gas is introduced into the crucible opening through the multiple inert gas introduction nozzles, and inert gas molecules can collide with evaporation gas molecules in the crucible opening, so that kinetic energy for upward movement of the evaporation gas molecules is increased, and the evaporation gas molecules flying to the surface of a substrate and deposited are increased greatly. Compared with the prior art, with the adoption of the scheme, the utilization rate of the evaporation material can be increased, and the evaporation efficiency is improved.

The invention provides an air conditioner. The air conditioner comprises a compressor, a four-way valve, an indoor heat exchanger, a throttling device, an outdoor heat exchanger, a defrosting bypass branch and an intermediate heat exchanger, wherein the compressor, the four-way valve, the indoor heat exchanger, the throttling device and the outdoor heat exchanger are connected to one another to form a main loop; gas exhausted from the compressor enters the outdoor heat exchanger through the defrosting bypass branch so that defrosting can be implemented; the intermediate heat exchanger comprises a first branch and a second branch, and is serially connected between the outdoor heat exchanger and an indoor heat exchanger through the first branch; the second branch is connected to a defrosting liquid outlet of the outdoor heat exchanger and a gas sucking opening of the compressor; and defrosting refrigerant, refrigerant in the second branch and refrigerant in the first branch are in heat exchange, and enter a gas sucking opening of the compressor after being evaporated. By-pass defrosting can be implemented by the gas exhausted from the compressor, by the intermediate heat exchanger, the evaporation efficiency of the refrigerant is improved, the defrosting speed is increased, and the thermal comfort of a room and the heating energy efficiency of the air conditioner are improved. The invention also provides a control method of the air conditioner.

The invention relates to a polymer microporous membrane. The polymer microporous membrane comprises a first surface and a second surface which have different functions, wherein the first surface is aphoto-thermal conversion surface, and the second surface is hydrophobic self-floating surface. The polymer microporous membrane integrates the functions of self-floatation, thermal insulation and water absorption, the length of a water absorption channel in a photo-thermal evaporation process can be further reduced, the water absorption efficiency is improved, the salting out phenomenon in the evaporation process is inhibited, the thermal conduction is reduced, the loss of heat energy in the process is reduced, the utilization rate of sunshine is increased, and the evaporation efficiency is improved. Besides, the polymer microporous membrane is prepared by virtue of the methods of surface induced crystallization, hydrophilic polymer surface permeation and template printing, the polymer microporous membrane with hydrophilic first surfaces with different thickness can be obtained, the immersion depth of the polymer microporous membrane during the self-floatation on the water surface is realized, and the applicability of the polymer microporous membrane is broadened.

Disclosed is a refrigerator in which a space occupied by an evaporating dish can be minimized, evaporation efficiency of defrost water by convection-heat transfer can be improved, air can be easily exhausted in a machine room, and thus the cooling efficiency of a compressor and a condenser can be improved. The refrigerator includes: a cooling apparatus including a compressor, a condenser, and an evaporator; a blowing fan blowing air to cool at least one of the compressor and the condenser; a blowing guide duct guiding the air blown by the blowing fan to an exterior; and an evaporating dish installed in a lower portion of the blowing guide duct in order to collect and evaporate defrost water, the evaporating dish having an opened upper portion to communicate with a path of the blowing guide duct.

The invention relates to a method and a device for recovering a polyethylene glycol raffinate byproduct form an ethylene glycol process. The method comprises the following steps of: (1) adding phosphoric acid into the polyethylene glycol raffinate, controlling the pH value to be between 7 and 9, conveying the mixture to a preheater (1), and preheating; (2) allowing a preheated material to enter a scraper falling-film evaporator (2), discharging a material at the bottom of the evaporator into an intermediate tank (3), and allowing the material to enter the preheater (1) through a centrifugal separator (8); (3) conveying the mixture of water and alcohol on the top of the falling-film evaporator to a dehydration rectifying tower (3); (4) conveying a mixed alcohol material at the bottom of the tower to an ethylene glycol separating tower (4); (5) conveying the material at the bottom of the tower to a diethylene glycol separating tower (5); and (6) conveying the material at the bottom to a triethylene glycol separating tower (6), and collecting products on the top and bottom of the tower respectively. The method is simple, efficient and low in energy consumption, and is suitable for industrial application; and by the method, the utilization rate of the raffinate produced by ethylene glycol is improved.

The invention discloses a preparation method of a rare-earth permanent magnet, a preparation device and a rare-earth permanent magnet prepared thereby, and relates to the preparation technology of sintered rare-earth permanent magnet with high coercivity. The invention is characterized in that the preparation method is carried out in two-chamber vacuum equipment which can be communicated with each other and also can carry out pressure increasing and decreasing treatment and heating treatment, and comprises the following steps of: firstly putting an evaporation material in a first chamber for crushing; putting a treated piece in a second chamber, vacuumizing the second chamber and enabling the vacuum degree of the second chamber to be equivalent to that of the first chamber; transferring the treated piece into the first chamber and carrying out heat diffusion treatment in the first chamber; carrying out pressure decreasing on the first chamber, and enabling the vacuum degree of the first chamber to be equivalent to that the second chamber; and transferring the treated piece back into the second chamber, and carrying out aging treatment in the second chamber. The preparation method disclosed by the invention has the advantages that no powder is remained on the surface of the magnet; the metal powder is adopted for evaporation, so that the evaporation efficiency is greatly increased, and the purpose of providing high-coercivity and high-remanence magnet by using fewer heavy rare-earth materials can be realized; and simultaneously, the magnet has stronger corrosion resistance.

The invention relates to a device of seawater desalination and poor quality water purification and a method thereof. A treatment pool has at least a transparent surface on the top; a three-dimensional network body is placed inside the treatment pool and contains10 percent to 99 percent of porosity and specific surface area thereof is not less than 0.05m<2> / g of a pass-through micro-pore. A water inlet, an air inlet and a high moisture airflow outlet are arranged in the treatment pool. The high moisture airflow outlet is connected with a condensing chamber, which is connected with a refrigerator. The lower part of the refrigerator is provided with a purifying water outlet. Raw water is filtered in advance to remove relatively large impurities and then is fed into the treatment pool so as to be fully permeated to the three-dimensional network body; the liquid absorbed inside the three-dimensional network body evaporates under the function of the airflow; the high moisture airflow going out of the three-dimensional network body after cooled is sent into the condensing chamber to become fresh water or pure water, and the fresh water or pure water comes out of the condensing chamber is absorbed by active carbon and / or is treated by ultraviolet sterilization in become drinking water. The invention is characterized by small energy consumption, high efficiency and good stability.

The invention belongs to a method for extracting lead-zinc oxide through oxygen enriched combustion by utilizing zincilate volatilization kiln. The process comprises the steps such as burdening, oxygen preparation, oxygen pressure storage, gas mixing, concentration adjusting, air supply and the like, wherein in the burdening link, the mass ratio of leaching slag to coal is 1:(35-45) and the mixture comprises 12-16wt% of carbon; in the volatilization process, slaked lime accounting for 5-10wt% of the mixture is added; in the gas mixing link, oxygen with the volume concentration of more than 90% and the oxygen supply pressure of 0.4-0.5Mpa is introduced, oxygen is mixed in a gas mixing tank at the head of the kiln, and the volume concentration of the mixed gas is controlled to be 25-45%; and in the volatilization link, lead-zinc oxide smoke is controlled to be volatilized and output at the temperature of 200-1350 DEG C. According to the invention, the carbon combustion condition of the volatilization kiln can be improved, the fuel consumption can be greatly reduced, the concentration of the oxygen in the volatilization kiln can be reasonably promoted, the carbon combustion efficiency can be improved, energy conservation can be achieved, the cost is lowered, and the metal volatilization ratio can be improved.

The invention discloses an energy-saving and environment-friendly heating furnace capable of generating steam in a spiral pipe. The energy-saving and environment-friendly heating furnace comprises a containing cavity and a water storing cavity, and the water storing cavity is arranged at the lower end of the interior of a furnace body; the spiral pipe is arranged in a water filling pipe, a rotation shaft is arranged in the spiral pipe, and stirring rods are distributed on the rotation shaft in an array mode; a first fixing pipe is connected to the lower end of the spiral pipe, the right side of the first fixing pipe communicates with a control pipe, a control valve is arranged on the control pipe, the upper end of the control pipe is connected to a waste heat recycling pipe through a connecting pipe, and a condensate water inlet pipe is inserted into the waste heat recycling pipe; and a partition plate is arranged between the containing cavity and the water storing cavity, and a steamguiding cover is arranged on the left side of the lower end of the partition plate. According to the energy-saving and environment-friendly heating furnace capable of generating the steam in the spiral pipe, by adopting the spiral structure, the flame burning time is effectively prolonged, the fire source and fuel gas contact area is effectively increased, burning is more sufficient, the heat dissipation area is increased, and the heat transfer efficiency is high; and through stirring, the water heating rate is increased, the evaporation efficiency is high, and waste heat of exhaust gas generated after burning can be reutilized.

The invention discloses a treatment method of low-temperature evaporation high-concentration sewage. The method comprises the following steps: feeding the preheated hot air to a hot air inlet end of a low-temperature plate evaporator; feeding the preheated sewage to a sewage inlet end of the low-temperature plate evaporator, wherein the low-temperature plate evaporator is mainly formed by a plurality of layers of evaporation plates in a stacking manner; the sewage entering inside a flow control component forms a continuous laminar liquid film from top to bottom through the flow control component; the hot air entering an air pre-heating component forms a continuous ascend airflow from bottom to top, so that the continuous ascend airflow and the continuous laminar liquid film are subjected to countercurrent contact; saturated steam is finally formed by the continuous ascend airflow through the multi-layer evaporation plate, so that the saturated steam is discharged through a hot air outlet at the top; the continuous laminar liquid film is separated out in a form of a crystal substance after being fully evaporated, the un-evaporated sewage is discharged from a sewage outlet at the bottom. Thus, the treatment method disclosed by the invention is small in investment, good in treatment effect, low in energy consumption, green and environmentally friendly.

The invention discloses a cool wool knitted fabric and a processing method of the cool wool knitted fabric. The fabric is processed by respectively carrying out hydrophilic and hydrophobic processing on wool fibers scaled and lightened through enzyme treatment and then blending the hydrophilic and hydrophobic wool fibers according to an appropriate proportion, wherein the hydrophilic processing method is low-pressure plasma treatment. The processing method is characterized by respectively carrying out hydrophilic and hydrophobic processing on the wool fibers scaled and lightened through enzyme treatment; and blending the hydrophilic and hydrophobic wool fibers according to an appropriate proportion, wherein the hydrophilic processing method is low-pressure plasma treatment; and the hydrophobic processing method is characterized by using a three-proofing finishing agent for hydrophobic processing. The processing method of the cool wool fabric is simple in production process. The produced cool wool fabric product has good fastness to washing and an excellent cool effect and is especially suitable for spring and summer sportswear.

The invention provides a method for extracting germanium from lignite through a pyrogenic process. The method is characterized in that germanium-containing lignite volatilizes germanium in a pyrogenic-process smelting procedure of a vertical kiln; a control condition of volatilizing germanium is that the temperature is between 1,150 and 1,250 DEG C; in a suitable reducing atmosphere, the germanium existing as germanium dioxide generates germanium monoxide after reduction reaction through carbon particles and carbon monoxide; a suitable oxidizing atmosphere ensures that the germanium monoxide follows dust particles volatilized simultaneously to meet excessive oxygen in a flue gas tube and then is oxidized to be the germanium dioxide; the temperature of the germanium dioxide is lowered through a cooler; the generated germanium dioxide is changed into a solid state and is attached to the surfaces of the dust particles; the germanium-enriched dust particles pass an electrostatic dust catcher and then are attached to the electrostatic dust catcher; and germanium-enriched electrostatic dust is collected so as to obtain germanium concentrate. The method is advanced in technology, economical, practical and low in cost for extracting germanium. Compared with a chain-boiler germanium extracting process and other germanium extracting methods, the method has the advantages that the method is high in germanium volatilizing efficiency, the direct recovery rate of the electrostatic dust, the germanium-containing grade of the electrostatic dust and the post wet treatment yield of the output electrostatic dust, and is convenient for subsequent processing, and the like.

The invention discloses a solar photovoltaic waste heat-joule heat gradient utilization seawater desalination system, and belongs to the field of renewable energy source utilization. The system mainlycomprises a high-transmittance glass cover plate, a solar photovoltaic cell, heat conduction silica gel, a heat conduction aluminum plate, a seawater flow channel, an electric heating layer, a hydrophobic film layer, a condensate flow channel, aheat preservation and insulation layer a seawater storage tank, a condensate collecting tank, a washing tank and an efficient fin radiator. The system iscomposed of multiple layers of seawater desalination devices. The desalination devicesare arranged in the heat preservation and insulation layer, the high-transmittance glass cover plate, the solar photovoltaic cell, the heat conduction silica gel, the heat conduction aluminum plate, the electric heating layer, the hydrophobic film layer, the seawater flow channel, the seawater storage tank and the condensed water collection tank are sequentially arranged in the heat preservation and insulation layer from top to bottom. Waste heat and electric energy generated by power generation of the solarphotovoltaic cell are utilized, energy is utilized in situ or in a gradient mode to participate in sea water desalination, solar energy is utilized to the maximum extent, and meanwhile the evaporationefficiency and the sea water desalination capacity of the system are greatly improved.

The invention discloses a treatment system and evaporating treatment method for high salinity wastewater. The treatment system comprises a desulfurization waste water conventional treatment device, a high-salinity water concentration device, a concentrated high-salinity water storage pool and an atomizer which are connected in sequence. The treatment system further comprises a high-salinity water boiling point reducing device which is arranged at any appropriate position in front of the concentrated high-salinity water storage pool. The water spraying amount of concentrated high-salinity water sprayed out of the atomizer can be adjusted. The treatment method comprises the steps that 1, after desulfurization waste water is subjected to conventional treatment, upper-layer clear water, namely, high-salinity water is collected, the high-salinity water is concentrated to be reduced, and concentrated high-salinity water is formed and stored in the concentrated high-salinity water storage pool; 2, the concentrated high-salinity water in the concentrated high-salinity water storage pool is sprayed into a flue between a hearth and a dust remover and / or the hearth through the atomizer and subjected to atomization and evaporation, and crystal substances are mixed into coal ash to be removed together, wherein the water spray amount of the concentrated high-salinity water sprayed into the flue between the hearth and the dust remover and / or the hearth is adjusted according to flue gas temperature.

The invention provides a self-adjusting type intelligent atomizing core which comprises a body and a printing resistor arranged on the upper surface of the body. The aperture of crystalline grains inthe body is increased from top to bottom. Due to the big-end-down aperture of the crystalline grains, cigarette liquid can conveniently permeate through the crystalline grains from bottom to top and can be prevented from flowing downward, the upward moving cigarette liquid in a liquid inlet groove can press against the downward movement of the atomized cigarette liquid and the cigarette liquid pressed by the atomized cigarette liquid to move downward, the volatilizing efficiency of the atomized cigarette liquid is improved, and the atomizing efficiency of the cigarette liquid is improved. Dueto the design, the invention further provides a manufacturing method of the self-adjusting type intelligent atomizing core. The manufacturing method includes the steps of sequential overlapping of a plurality of ceramic layers, calcinating, silk-screening and sintering. The method is simple in process and reliable.

The invention discloses a ferric phosphate wastewater treatment process and treatment device, wherein the treatment process comprises the following steps of (1) membrane concentration: ferric phosphate wastewater is subjected to membrane concentration to obtain concentrated water and fresh water, wherein the membrane concentration includes reverse osmosis and / or electroosmosis; (2) evaporation: the concentrated water is evaporated to recycle a nitrogen and phosphorus compound fertilizer; the evaporated concentrated liquid flow backs to the membrane concentration front end for circulation treatment; (3) resin treatment: the fresh water and evaporated condensed liquid are subjected to resin absorption treatment; resin absorption effluent is discharged in a standard reaching way or is reused for production; resin analytical liquid is subjected to membrane concentration treatment. Multistage reverse osmosis and resin absorption treatment are combined; ferric polyphosphate wastewater is subjected to desalination and ammonia and nitrogen removal step by step, so that the insulation capability of the whole treatment process on ammonia and nitrogen is higher; the ammonia and nitrogen discharging standard exceeding of effluent can be effectively avoided.

The invention discloses a distillation desalination system for a solar chimney, comprising: the solar chimney positioned above a heat collecting shed, wherein a source water pool and a fresh water pool are arranged on the periphery of the heat collecting shed, and a concentrated brine pool is arranged right below the solar chimney; an indirect-type condenser is arranged at the top part of the solar chimney, the outer wall of the indirect-type condenser is coated with heat insulation material, a source water feeding pipeline is connected between the source water pool and an inlet of the indirect-type condenser, and a water delivery pump is arranged in the source water feeding pipeline; a nozzle used for atomizing source water is arranged in the solar chimney, a source water draining pipeline is arranged between an outlet of the indirect-type condenser and the nozzle, and the pipeline is provided with a high pressure pump; and a fresh water collecting tank is arranged below the indirect-type condenser, and the pipeline is connected between the fresh water collecting tank and the fresh water pool. Simultaneously, the invention also discloses a desalination process by using the distillation desalination system. The invention solves the technical problems such as low heat transfer efficiency, slow evaporation speed, low fresh water yield, high specific investment of equipment and the like in the conventional solar distillation technology.

The invention relates to a vertical tube type falling-film evaporator. The vertical tube type falling-film evaporator comprises an upper tube box, a lower tube box, a casing, multiple heat exchange tubes, an upper tube plate and a lower tube plate, wherein a solution inlet and a secondary steam outlet I are arranged at the upper tube box, a concentrated liquid outlet and a secondary steam outlet II are arranged at the lower tube box, a steam inlet is arranged at the upper part of the casing, and a condensed water outlet is arranged at the lower part of the casing; a film distributing device used for distributing a solution on the inner walls of the heat exchange tubes is arranged in the upper tube box; the film distributing device comprises a liquid bearing plate, a liquid feeding plate, a liquid distributing plate and liquid guiding tubes. By means of a steam stripping effect generated by secondary steam and liquid films, the heat transferring push force and the evaporation efficiency are increased. The liquid films can be uniformly distributed by the film distributing device, the film forming is stable, the wall drying phenomenon is avoided, the recovery rate of secondary steam produced in an evaporator is high, the recovery is convenient, and the heat transferring efficiency is improved.

The invention discloses a photo-thermal conversion material, which has a double-layer structure, wherein the double-layer structure is a polydopamine layer on a polyurethane sponge layer, the top layer of the double-layer structure is dark black, the thickness of the top layer is 0.5-2.0 mm, and the total thickness of the double-layer structure is 10-25 mm. The preparation method of the photo-thermal conversion material comprises: S1, purifying polyurethane sponge; S2, loading polydopamine: immersing the polyurethane sponge purified in the step S1 into a container filled with a hydrochloric acid-containing dopamine trihydroxymethyl aminomethane buffer solution (Tris-HCl buffer solution), and carrying out a water bath reaction for 4-24 h at a temperature of 25-80 DEG C without any disturbance condition and container sealing to obtain modified sponge; and S3, drying. The invention also provides applications of the photo-thermal conversion material. According to the invention, with the photo-thermal conversion material, the problems of low efficiency, high cost, complex process and the like of the existing solar steam photo-thermal conversion are solved.

The invention relates to a centrifugal thin film evaporator for fluid even distribution in fluid film for evaporation and condensation, comprising a power and a main shaft connected to the power drive with evaporation channel and condensation return duct, evaporation introducer and condensation fluid extractor on the main shaft, a barrel with evaporator return opening equipped at the end of the main shaft, an isolation sleeve inside the barrel cavity and connected to the main shaft, an evaporator inside the isolation sleeve and fixed with the said isolation sleeve with evaporator cavity formed by the evaporator and the wall of the isolation sleeve and the evaporator cavity connecting to the evaporator channel and condensation duct respectively. It can shorten the evaporation period of material on the evaporator, with even fluid film, conducive to the improvement of evaporation efficiency and effect with energy conservation.

The invention provides a shielding device with a vacuum cavity body, comprising a support seat, a drive mechanism, a rotating shaft and a baffle. The drive mechanism comprises a motor, a drive gear and a driven gear, wherein the motor is fixed on the support seat; the output shaft of the motor is pivoted with the drive gear; the driven gear is engaged with the drive gear; one end of the rotating shaft is pivoted with the driven gear; the other end hermetically passes through the cavity wall of the vacuum cavity body and is vertically and fixedly connected with the baffle; the baffle is accommodated in the vacuum cavity body and positioned between an evaporation source in the vacuum cavity body and a processing board; and the drive mechanism drives the rotating shaft, and the rotating shaft drives the baffle to isolate or switch on a space of the evaporation source and the processing board. The shielding device with the vacuum cavity body has the advantages of simple structure, high evaporation efficiency and prolonged service life of the evaporation source.

The invention provides a machine room air conditioner system and a control method thereof. The machine room air conditioner system comprises a refrigeration circulating system and a heat pipe loop system. The refrigeration circulating system comprises a compressor, a condenser, a throttling device and an evaporator which are all connected with one another. A controller controlling the compression ratio of the compressor is arranged on the compressor. The controller is connected with a temperature sensor arranged outside a machine room. The heat pipe loop system comprises a fluorine pump and a heat pipe which are connected with the condenser and the evaporator; the heat pipe loop system is formed by the fluorine pump, the heat pipe, the condenser and the evaporator; and the heat pipe loop system can cool the machine room through a natural cold source outside the machine room. According to the technical scheme, on one hand, the compression ratio can be automatically adjusted by the machine room air conditioner system according to the outside temperature, and therefore the compressor can perform variable-compression-ratio work; and on the other hand, the machine room air conditioner system can cool the machine room through the outside natural cold source in winter and other cold seasons, and therefore the energy consumption of the machine room air conditioner system can be reduced.