Carbon sequestration device for in-situ treatment of agricultural and pastoral wastes

Abstract

An agricultural and pastoral waste in-situ treatment carbon sequestration device belongs to the technical field of livestock and poultry industry solid waste treatment and comprises a pretreatment unit and a waste treatment unit, the pretreatment unit comprises a pulverizer and a solid-liquid separator, and the pulverizer is located above the solid-liquid separator; the waste treatment unit comprises a solid-phase treatment device and a liquid-phase treatment device, the solid-phase treatment device comprises a primary carbonization kettle and a microwave carbonization tank, a feed port of the primary carbonization kettle is connected with a discharge port of the solid-liquid separator, a discharge port of the primary carbonization kettle is connected with a feed port of the microwave carbonization tank, and a discharge port of the microwave carbonization tank is connected with a discharge port of the solid-liquid separator; the liquid phase treatment device is connected with a liquid outlet of the solid-liquid separation device; and a carbon-based material for adsorption is arranged in the liquid phase treatment device. The two-stage carbonization reaction is utilized to obtain hydrothermal carbon with different properties, the separated sewage is subjected to adsorption treatment, nitrogen and phosphorus are enriched in water, and the rest of hydrothermal carbon is produced as a high-efficiency soil conditioner.

Description

Technical Field

[0001] The utility model relates to the technical field of solid waste treatment in livestock and poultry breeding, in particular to an in-situ treatment and carbon fixation device for agricultural and animal husbandry waste. Background Art

[0002] Water pollutants in the poultry farming industry account for a high proportion. At the same time, the amount of straw produced by agricultural production in my country each year is also quite large. The problem of large amounts of agricultural straw waste being generated and difficult to effectively treat needs to be solved urgently. Therefore, the development of effective methods for livestock waste treatment and resource recovery has become the key to solving the problem of livestock waste treatment and disposal. As an emerging technology, hydrothermal carbonization can better handle the problem of waste treatment with high water content, which is in line with the difficulty of treating agricultural waste with high water content.

[0003] Chinese patent application publication No. CN108129001A discloses a continuous hydrothermal carbonization system for livestock and poultry manure, including a fermentation tank, a high-pressure sludge pump, a heater, a carbonization reactor, a cooler, a storage tank, a sludge pump and a solid-liquid separator connected in sequence. The fermentation tank is also connected to a first gas collection device through a pipeline, and the storage tank is also connected to a second gas collection device through a pipeline. After the pretreated livestock and poultry manure is fermented in an anaerobic fermentation tank, the power provided by the high-pressure sludge pump is continuously input into the heater, the carbonization reactor and the cooler. The carbonized product after cooling is separated by a solid-liquid separator to obtain hydrothermal charcoal and carbonized liquid. This application first performs fermentation and then hydrothermal carbonization. It is relatively time-consuming and energy-consuming. Utility Model Content

[0004] On the one hand, the utility model mixes agricultural and animal husbandry manure and / or straw for in-situ treatment and carbonizes them to obtain a hydrothermal charcoal product with better structure and performance.

[0005] On the other hand, the utility model can recycle part of the waste heat during the in-situ treatment of mixed manure and / or straw in livestock and poultry breeding, thereby reducing the energy consumption of heating.

[0006] In one aspect, an in-situ treatment and carbon fixation device for agricultural and animal husbandry wastes comprises a pretreatment unit and a waste treatment unit;

[0007] The pretreatment unit includes: a pulverizer and a solid-liquid separator, wherein the pulverizer is located above the solid-liquid separator;

[0008] The waste treatment unit includes a solid phase treatment device and a liquid phase treatment device. The solid phase treatment device includes a primary carbonization kettle and a microwave carbonization tank. The feed port of the primary carbonization kettle is connected to the discharge port of the solid-liquid separator. The discharge port of the primary carbonization kettle is connected to the feed port of the microwave carbonization tank. The liquid phase treatment device is connected to the liquid outlet of the solid-liquid separator.

[0009] Carbon-based materials for adsorption are configured in the liquid phase treatment device. The in-situ treatment and carbon fixation device for agricultural and animal husbandry waste processes the solid agricultural and animal husbandry waste after solid-liquid separation through two-stage carbonization, a primary carbonization kettle and a microwave carbonization tank, and makes full use of the hydrothermal reaction to modify the biomass waste in a closed, high-temperature, and high-pressure environment, transforming it into biochar, destroying extracellular polymers, and killing pathogens and other microorganisms, thereby achieving the reduction, stabilization, and harmlessness of solid waste residues from farms at low cost and high efficiency. The hydrothermal charcoal produced after microwave treatment in this application has a certain adsorption capacity, and has a larger specific surface area and better chemical stability than ordinary activated carbon. It can be used to adsorb pollutants in wastewater and return to the field as a soil conditioner, acting as a biochar slow-release fertilizer.

[0010] In certain embodiments, the carbon-based material comprises hydrothermal carbon obtained after being treated in a microwave carbonization tank.

[0011] In certain embodiments, a primary carbon storage tank is disposed between the primary carbonization kettle and the microwave carbonization tank, and a filter screen is disposed at the bottom of the primary carbon storage tank.

[0012] The discharge port of the primary carbonization kettle is connected to the feed port of the primary carbon storage tank, and the discharge port of the primary carbon storage tank is respectively connected to the microwave carbonization tank and the liquid discharge pipe.

[0013] The solid matter (with a certain amount of water) is heated in the primary carbonization kettle to be carbonized. After carbonization, the mixture is transported to the primary carbon storage tank, and the mixture is separated into solid and liquid through the filter screen at the bottom. The liquid flows out of the primary carbon storage tank through the drain pipe, and the solid filter residue is transported to the microwave carbonization tank for carbonization under the action of microwave.

[0014] The primary carbonization kettle is a tank body with a sandwich structure, and a heat conduction pipe is arranged in the sandwich to surround the inner layer.

[0015] In certain embodiments, the discharge port of the microwave carbonization tank is connected to the waste heat recovery tank.

[0016] The waste heat recovery tank is a tank body with a sandwich structure, in which a first heat conducting pipe is arranged to surround the inner layer. A discharge port is arranged at the bottom of the waste heat recovery tank.

[0017] The mixture treated in the microwave carbonization tank enters the waste heat recovery tank, and the heat transfer oil introduced into the heat transfer pipe performs heat exchange to recover the heat of the microwave carbonization product.

[0018] As an optional solution, a preheating tank is provided between the primary carbonization kettle and the solid-liquid separator.

[0019] The preheating tank is a tank body of a sandwich structure, and a heat exchange tube is arranged in the sandwich to surround the inner layer.

[0020] The solid material transported out of the solid-liquid separator enters the preheating tank, and the heat transfer oil in the first heat transfer pipe of the waste heat recovery tank flows into the heat exchange tube in the interlayer of the preheating tank. The heat of the microwave carbonization product absorbed by the first heat transfer oil is used to preheat the solid and liquid materials in the preheating tank.

[0021] The two ends of the heat transfer pipe of the waste heat recovery tank are connected to the two ends of the heat exchange pipe of the preheating tank through pipes, forming a closed flow channel for heat transfer oil. The heat transfer oil in the first heat transfer pipe of the waste heat recovery tank, which has absorbed heat, flows into the heat exchange pipe in the interlayer of the preheating tank to heat the material in the preheating tank.

[0022] In this embodiment, the heat of the microwave carbonization product is reused to preheat the solid material to be processed, which can reduce the heat required for carbonization in the primary carbonization kettle and reduce the overall energy consumption.

[0023] In an optional solution, a spiral feeding device is provided in the feed port of the solid phase disposal device, which is connected to the preheating tank. The discharge port of the preheating tank is connected to the transmission pipeline, and a propulsion pump is provided on the outer layer of the pipeline.

[0024] In certain embodiments, a device for in-situ carbon fixation of agricultural and animal husbandry waste is further provided with a solar collector.

[0025] The solar thermal collector disclosed in the prior art can be used.

[0026] The vacuum heat absorbing tube of the solar heat collector adopted in the utility model adopts a secondary concentrator structure. A reflection groove is arranged in the vacuum heat absorbing tube, and the reflection groove is directly opposite to the heat conducting tube.

[0027] The heat pipe of the solar collector is connected to the heat exchange pipe in the interlayer of the primary carbonization kettle, and the heat transfer oil in the heat pipe heated by solar energy is transported to the heat exchange pipe in the interlayer of the primary carbonization kettle to heat and carbonize the materials in the primary carbonization kettle.

[0028] The heat transfer oil passing through the solar collector is input into the primary carbonization kettle, and the heat transfer oil in the primary carbonization kettle releases heat and then connects to the tail of the solar collector to form a closed loop. A pump is set at the solar collector to supply energy for the heat transfer oil circulation.

[0029] In certain embodiments, a stirring motor and a pressure relief valve are arranged at the top of the primary carbonization kettle; the motor is connected to a stirring shaft, and a U-shaped stirring blade is arranged on the stirring shaft; and a discharge port and a shut-off valve are arranged at the bottom of the primary carbonization kettle.

[0030] In certain embodiments, the liquid discharge port of the liquid treatment device is connected to the ultraviolet sterilization device through a pipeline.

[0031] The ultraviolet sterilization device is equipped with transparent inner and outer sleeves. Wastewater flows through the inner sleeve and the outer sleeve. Ultraviolet lamps are arranged inside the inner sleeve and outside the outer sleeve, which has a higher sterilization efficiency than surface irradiation.

[0032] The waste liquid discharged from the solid-liquid separation device is mixed with the discharge liquid from the primary carbon storage tank and the filtrate from the filter press device and then enters the ultraviolet sterilization device for sterilization.

[0033] The waste liquid discharged from the agricultural and animal husbandry waste carbon fixation device of the utility model can achieve the waste liquid irrigation reaching the standard while recovering the excessively concentrated ammonia nitrogen and total phosphorus therein respectively, thereby reducing the possibility of environmental pollution such as eutrophication caused by direct irrigation of wastewater from livestock and poultry farms, and at the same time enriching nitrogen and phosphorus in hydrothermal charcoal to realize the recycling of waste.

[0034] The pulverizer and solid-liquid separator of the utility model can adopt the equipment for pulverizing solid substances disclosed in the prior art.

[0035] For example, in some embodiments, the shell of the grinder is supported by a base evenly installed on its outer edge and connected to the solid-liquid separator. A support frame is provided on the top of the grinder shell to fix the grinder shell and the inner wall. The bottom supporting plate of the grinder is a funnel structure with a discharge port in the middle. The feces feed pipe is connected to the end of the grinder discharge pipe and connected to the solid-liquid separator feed port.

[0036] The solid-liquid separator has a hierarchical structure, with a bucket-type reducer at the feed inlet, a double-layer screen at the top, and a solid phase discharge port at the edge for separating the solid phase of the mixture. The lower layer of the screen is a hydrothermal carbon adsorption chamber, and a partition is provided at the bottom layer of the adsorption chamber. The upper layer of the partition is evenly connected to a water storage chamber at the bottom layer through a water filter cap. A pipe is provided for discharging waste liquid from the water storage chamber. A vibration motor is provided inside the base of the solid-liquid separation device, and a driving spring is fixed to the double-layer screen with bolts as a vibration separation power source.

[0037] The solid hydrothermal charcoal obtained after treatment by the equipment of the utility model has good performance and can be used as a soil improver. It has a slow-release effect after application; it can also be used for other purposes such as adsorption. The treated waste liquid can also be used here. In addition, in the treatment process, the energy is rationally reused, which can save energy and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of the in-situ treatment and carbon fixation device for agricultural and animal husbandry wastes of the utility model.

[0039] Figure 2 It is a cross-sectional schematic diagram of the in-situ treatment and carbon fixation device for agricultural and animal husbandry waste of the utility model.

[0040] Figure 3 It is a schematic diagram of the internal structure of the primary carbonization kettle of the utility model.

[0041] Figure 4 This is a schematic diagram of the internal structure of the microwave carbonization tank of the utility model.

[0042] Figure 5 This is a process flow chart of the in-situ treatment and carbon fixation device for agricultural and animal husbandry wastes of the utility model.

[0043] Markings in the figure: 1-toothed roller crusher; 2-shovel-type reducer; 3-solid-liquid separator; 4-hydrothermal carbon adsorption chamber; 5-ultraviolet sterilization device; 6-preheating tank; 7-first heat conduction pipe; 7'-second heat conduction pipe; 8-primary carbonization kettle; 9-pressure relief valve; 10-U-shaped stirring blade; 11-primary carbon storage tank; 12-microwave carbonization tank; 13-microwave transmitter; 14-waste heat recovery tank; 15-trough solar collector. DETAILED DESCRIPTION

[0044] The following is a further detailed description of the agricultural and animal husbandry waste in-situ treatment carbon fixation device of the present application. It does not limit the scope of protection of the present application, and its scope of protection is defined by the claims. Certain disclosed specific details provide a comprehensive understanding of each disclosed embodiment. However, those skilled in the art know that the embodiment can be implemented without using one or more of these specific details and using other materials, etc.

[0045] Unless the context requires otherwise, in the specification and claims, the terms "include" and "comprising" should be construed as having an open-ended, inclusive meaning, that is, "including, but not limited to".

[0046] The "embodiment", "one embodiment", "another embodiment" or "certain embodiments" mentioned in the specification means that the specific features, structures or characteristics described in connection with the embodiment are included in at least one embodiment. Therefore, "embodiment", "one embodiment", "another embodiment" or "certain embodiments" do not necessarily all refer to the same embodiment. Moreover, specific features, structures or characteristics may be combined in any manner in one or more embodiments. Each feature disclosed in the specification may be replaced by any alternative feature that can provide the same, equal or similar purpose. Therefore, unless otherwise specified, the disclosed features are only general examples of equal or similar features.

[0047] refer to Figure 1 , Figure 2 As shown in the figure, a carbon fixation device for in-situ treatment of agricultural and animal husbandry waste is provided, wherein the discharge port of the toothed roller crusher 1 is connected to the solid-liquid separator 3 via a shovel-type reducer 2. The toothed roller crusher 1 is located above the solid-liquid separator 3.

[0048] A vibration motor is arranged inside the solid-liquid separator 3, a double-layer screen is arranged on the upper layer, a solid phase discharge port is arranged on the right edge inside the solid-liquid separator 3, and a manure feed port is arranged on the left side. A liquid outlet is arranged at the bottom of the solid-liquid separator 3.

[0049] The solid and liquid separated by the solid-liquid separator 3 are processed by a solid processing device and a liquid phase processing device respectively.

[0050] The liquid phase processing device can be arranged as follows.

[0051] Optionally, a liquid phase treatment device, i.e., a hydrothermal carbon adsorption chamber 4, is provided below the solid-liquid separator 3. A partition is provided at the bottom of the adsorption chamber of the hydrothermal carbon adsorption chamber 4, and a water filter cap is evenly provided on the upper layer of the partition, and the water filter cap is connected to the water storage chamber at the bottom. The rear end of the water storage chamber is connected to an ultraviolet sterilization device 5, and the ultraviolet sterilization device 5 is provided with transparent inner and outer sleeves, and ultraviolet lamps are provided inside the inner sleeve and outside the outer sleeve.

[0052] The solid phase processing device can be arranged as follows.

[0053] As attached Figure 1 , 2 As shown, the solid phase processing device includes a preheating tank 6 , a primary carbonization kettle 8 , a primary charcoal storage tank 11 and a microwave carbonization tank 12 .

[0054] The solid phase discharge port of the solid-liquid separator 3 is connected to the preheating tank 6, and the solid material is transported by a screw feeding device. The preheating tank 6 is a tank body with a sandwich structure, and a heat exchange pipe is arranged in the sandwich to surround the inner layer.

[0055] The outlet of the preheating tank 6 is connected to a transmission pipeline, a propulsion pump is arranged outside the pipeline, and the end of the pipeline is connected to a primary carbonization kettle 8.

[0056] As attached Figure 1-3 As shown, the top of the primary carbonization kettle 8 is provided with a stirring motor, a pressure relief valve 9 and a U-shaped stirring blade 10, and the bottom of the kettle is provided with a primary hydrothermal charcoal discharge port. The primary carbonization kettle 8 is a tank body with a sandwich structure, and the sandwich is provided with a heat exchange tube surrounding the inner layer, and a bracket is provided outside to support the kettle body. The discharge port pipeline of the primary reaction kettle 8 is connected to the primary charcoal storage tank 11.

[0057] The primary carbon storage tank 11 is provided with a filter screen at the bottom thereof, which is used to separate the solid and liquid of the carbonized material in the primary carbonization kettle 8. Usually, when treating manure or a mixture of manure and straw, the solid to be carbonized has a certain water content. The primary carbonized material is separated into solid and liquid in the primary carbonization tank 11.

[0058] The primary carbon storage tank 11 has a distributing port at the bottom of the discharging port, which is connected to the ultraviolet sterilization device 5 and the microwave carbonization tank 12 respectively. Figure 4As shown, a microwave emitter 13 is provided in the microwave carbonization tank 12. The liquid separated by the primary carbon storage tank 11 is discharged into the ultraviolet sterilization device 5 for ultraviolet sterilization treatment, and the filtered solid matter enters the microwave carbonization tank 12, where the matter is carbonized under microwave conditions to obtain a carbon-based material with better structural performance.

[0059] In the solid processing unit, the energy required for carbonization of biomass under heating conditions is reasonably recycled in the following ways to reduce energy consumption. Figure 5 Process flow chart of .

[0060] The bottom of the microwave carbonization tank 12 is provided with a shutoff valve, and the lower part is provided with an outlet connected to the waste heat recovery tank 14. The waste heat recovery tank 14 is a tank body with a sandwich structure, the first heat pipe 7 is arranged in the sandwich and surrounds the inner layer, and the bottom of the waste heat recovery tank 14 is provided with a conveyor belt discharge port.

[0061] The two ends of the heat exchange tubes arranged in the interlayer of the preheating tank 6 are respectively connected to the two ends of the heat conduction tubes arranged in the interlayer of the waste heat recovery tank 14 through pipes to form a closed flow path. The heat conduction oil absorbs the heat of the carbonized material in the microwave carbonization tank 12 through heat exchange in the waste heat recovery tank 14. The heat conduction oil that absorbs a certain amount of heat flows into the heat exchange tubes of the preheating tank 6, and heat exchanges the solid material in the preheating tank to preheat it. After releasing the heat in the heat exchange tubes, the heat conduction oil returns to the first heat conduction tube 7 of the waste heat recovery tank 14 to absorb the heat of the carbonized product. In this cycle, the heat of the carbonized material is used for preheating treatment in the preheating tank 6. The energy consumption during the carbonization process is reduced.

[0062] The trough type solar collector 15 is arranged outside. The vacuum heat absorbing tube in the solar collector 15 adopts a secondary concentrator structure. A reflecting trough is arranged in the vacuum heat absorbing tube. The reflecting trough is directly opposite to the second heat conducting tube 7' to heat the heat conducting oil in the heat conducting tube. The two ends of the heat exchange tube arranged in the interlayer of the primary carbon storage tank 11 are respectively connected to the two ends of the second heat conducting tube 7' through pipes to form a closed flow path. A pump is arranged at the solar collector to supply energy for the heat conducting oil circulation. The heat conducting oil in the second heat conducting tube flows into the heat exchange tube of the primary carbon storage tank 11 to heat and carbonize the material.

[0063] When the agricultural and animal husbandry waste in-situ treatment carbon fixation device processes straw and manure at the same time, the toothed roller crusher 1 and the solid-liquid separator 3 need to be connected and used at the same time. After being crushed by the toothed roller crusher 1, the straw can enter the solid-liquid separator 3, and the discharge port of the toothed roller crusher 1 is connected to the manure feed port on the left side of the solid-liquid separator 3. The crushed straw and manure are separated into solid and liquid in the solid-liquid separator 3.

[0064] Optionally, if only straw is to be processed, the toothed roller crusher 1 does not need to be connected to the solid-liquid separator 3. The crushed straw can be directly transported to the solid processing device for carbonization.

[0065] Optionally, if only manure is processed, the toothed roller crusher 1 does not need to be connected to the solid-liquid separator 3. The manure directly enters the solid-liquid separator 3, and the separated solids are transported to the solid processing device for carbonization.

[0066] The functions of the various components in the device system include: the tooth roller crusher 1 is used to crush the straw and reduce the particle size of the straw to facilitate subsequent separation and carbonization; the solid-liquid separator 3 adopts vibration separation technology to separate the manure and straw residue into solid and liquid, and control the moisture content of the material entering the carbonization device; the hydrothermal carbon adsorption chamber 4 is placed with hydrothermal carbonization produced by microwave carbonization process to adsorb the sewage separated in 3; the preheating tank 6 preliminarily preheats the hydrothermal carbonization raw material to reduce the subsequent heating energy consumption; the primary carbonization kettle 8 uses the heat of the heat transfer oil to heat the residue to reach the hydrothermal carbonization temperature, in a closed, high-temperature, high-pressure Under the environment, biomass waste is modified to generate hydrothermal charcoal; U-shaped stirring blades 10 stir the material to make it evenly heated; pressure relief valve 9 controls the pressure in the carbonization tank by switching to ensure the safe and normal carbonization process; cut-off valve 14 controls the material to go to the next stage; microwave transmitter 13 emits microwaves to heat the material to the carbonization temperature, and microwave hydrothermal carbonization is carried out in microwave carbonization tank 12 to produce high-performance hydrothermal charcoal; waste heat recovery tank 14 uses the heat transfer oil pipeline to complete the recovery of carbonization waste heat, and returns to the preheating tank for heat reuse; ultraviolet sterilization device 5 sterilizes the waste liquid generated by the device through ultraviolet rays. Trough solar collector 15 transfers heat to the heat transfer oil to provide energy for the primary carbonization process.

[0067] In specific applications, the energy supply structure is divided into two blocks: heat recovery and solar heat collection. The heat exchange tube of the preheating tank 6 is connected in series with the first heat pipe 7 of the waste heat recovery tank 14 to form a closed flow path; the heat exchange tube of the primary carbonization tank 8 is connected in series with the second heat pipe 7' of the solar collector 15 to form a closed flow path to achieve step-by-step heat utilization. The solar heat collection module is provided with a trough solar collector 15, and a tracking system is provided at the fixing place of the collector bracket to adjust the direction of the trough absorber.

[0068] Taking the simultaneous treatment of straw waste and manure as an example, the specific operation process is as follows: after the straw waste and manure generated in the livestock farm are collected, they are sent to the agricultural and animal husbandry waste in-situ treatment carbon fixation device respectively. The straw and manure enter the pretreatment device from the feed ports set at the top and bottom of the crusher respectively. After the straw is crushed by the crusher 1, it falls from the middle discharge port, mixes with the manure in the pipeline, and enters the solid-liquid separator 3. The feed port of the solid-liquid separator 3 is provided with a bucket reducer 2 to control the material descent speed. The double-layer screen on the upper layer is driven by the vibration motor to vibrate for solid-liquid separation. The lower layer of the screen is a hydrothermal carbon adsorption chamber 4 (liquid phase treatment device), and a partition is provided at the bottom of the adsorption chamber. The upper layer of the partition is uniformly filtered by a water filter cap, which is connected to the bottom water storage chamber by the water filter cap, and a pipeline is provided for discharging the waste liquid in the water storage chamber. The solid matter in the solid-liquid separator 3 is trapped in the upper part, and the waste liquid flows into the hydrothermal carbon adsorption chamber 4 at the lower part for adsorption treatment, and enters the bottom water storage chamber through the water filter cap. The screened solids move due to vibration, enter the pipeline through the solid phase discharge port set on the upper edge of the screen, and are transported to the preheating tank 6 by the spiral feeding device. The heat transfer oil in the heat exchange tube coiled on the outer shell of the preheating tank 6 exchanges heat with the material in the tank, so that the material is heated to achieve the purpose of preheating.

[0069] The preheated material is pumped by the propulsion pump to the hydrothermal carbonization system for carbonization. When the material is transported to the primary carbonization kettle 8, the pressure relief valve 9 on the top of the kettle and the shut-off valve at the bottom are closed, and the stirring motor drives the U-shaped stirring blade 10 to stir the material entering the carbonization kettle. The heat exchange tube in the interlayer of the primary carbonization kettle provides heat for hydrothermal carbonization, and the biomass waste is modified in a closed, high-temperature, and high-pressure environment to generate hydrothermal carbon. After the carbonization is completed, the shut-off valve is opened, and the mixture in the primary carbonization kettle 8 falls into the primary carbon storage tank 11, and the filter at the bottom performs solid-liquid separation. The carbonized filtrate flows downward into the liquid phase disposal block, and the solid hydrothermal carbon enters the microwave carbonization tank 12 for further carbonization. The shut-off valve at the bottom of the microwave carbonization tank is closed, and the microwave transmitter 13 emits microwaves to heat the material to the carbonization temperature, and microwave hydrothermal carbonization is performed in the carbonization cavity to produce high-performance hydrothermal carbon. After microwave hydrothermal carbonization is completed, the shutoff valve is opened, and the valve is connected to the filter press device. A spiral shaft and a spiral disc are provided at the bottom of the feed tank of the filter press device. The filtrate is collected in the bottom filtrate tank and connected to the liquid phase disposal block by the outlet pipe. The hydrothermal carbon is collected in the waste heat recovery tank 14. After sufficient heat recovery in the waste heat recovery tank, the conveyor belt outlet connected to the bottom of the tank transports the hydrothermal carbon product out.

[0070] The liquid phase treatment system performs preliminary treatment on the waste liquid generated as a whole. The hydrothermal carbon adsorption chamber 4 connected below the solid-liquid separator 3 is filled with high-performance hydrothermal carbon generated by the microwave hydrothermal carbonization process to adsorb the sewage under the screen. The treated water and the carbonized filtrate generated by the two hydrothermal carbonizations flow into the water storage chamber, and the water in the water storage chamber is sterilized by the ultraviolet sterilization device 5 and then discharged.

[0071] This device prepares the manure and straw produced by the farm into hydrothermal charcoal for recycling. The waste heat recovery reduces energy consumption and realizes the in-situ treatment of solid waste from the farm. The hydrothermal charcoal produced by the device can be used as a soil conditioner and slow-release fertilizer, which has certain economic benefits. At the same time, the sewage is preliminarily adsorbed to achieve waste treatment.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the substantial technical content of the present invention. The substantial technical content of the present invention is broadly defined in the scope of the claims of the application. Any technical entity or method completed by others, if it is exactly the same as that defined in the scope of the claims of the application or an equivalent variation, will be deemed to be included in the scope of the claims.

Claims

1. An in-situ treatment and carbon fixation device for agricultural and animal husbandry waste, comprising a pretreatment unit and a waste treatment unit; characterized in that: The pretreatment unit includes: a pulverizer and a solid-liquid separator, wherein the pulverizer is located above the solid-liquid separator; The waste treatment unit includes a solid phase treatment device and a liquid phase treatment device. The solid phase treatment device includes a primary carbonization kettle and a microwave carbonization tank. The feed port of the primary carbonization kettle is connected to the discharge port of the solid-liquid separator. The discharge port of the primary carbonization kettle is connected to the feed port of the microwave carbonization tank. The liquid phase treatment device is connected to the liquid outlet of the solid-liquid separator. The liquid phase treatment device is provided with a carbon-based material for adsorption.

2. The in-situ treatment and carbon fixation device for agricultural and animal husbandry waste according to claim 1 is characterized in that: A primary carbon storage tank is arranged between the primary carbonization kettle and the microwave carbonization tank, and a filter screen is arranged at the bottom of the primary carbon storage tank; The discharge port of the primary carbonization kettle is connected to the feed port of the primary carbon storage tank, and the discharge port of the primary carbon storage tank is respectively connected to the microwave carbonization tank and the liquid discharge pipe.

3. The in-situ treatment and carbon fixation device for agricultural and animal husbandry waste according to claim 1 is characterized in that: A preheating tank is provided between the primary carbonization kettle and the solid-liquid separator; The preheating tank is a tank body of a sandwich structure, and a heat exchange tube is arranged in the sandwich to surround the inner layer.

4. The in-situ treatment and carbon fixation device for agricultural and animal husbandry waste according to any one of claims 1 to 3, characterized in that: The discharge port of the microwave carbonization tank is connected to the waste heat recovery tank; The waste heat recovery tank is a tank body of a sandwich structure, and a first heat conduction pipe is arranged in the sandwich to surround the inner layer.

5. The in-situ treatment and carbon fixation device for agricultural and animal husbandry waste according to claim 4 is characterized in that: The two ends of the first heat pipe of the waste heat recovery tank are connected to the two ends of the heat exchange pipe of the preheating tank through pipes, so that the heat transfer oil in the first heat pipe of the waste heat recovery tank flows into the heat exchange pipe of the preheating tank, and the heat transfer oil in the heat exchange pipe of the preheating tank returns to the first heat pipe of the waste heat recovery tank.

6. The in-situ treatment and carbon fixation device for agricultural and animal husbandry waste according to any one of claims 1 to 3, characterized in that: The in-situ carbon fixation device for agricultural and animal husbandry waste is also provided with a solar collector. The vacuum heat absorption tube of the solar heat collector adopts a secondary concentrator structure. A reflection groove is arranged in the vacuum heat absorption tube, and the reflection groove is directly opposite to the second heat conduction tube.

7. The in-situ treatment and carbon fixation device for agricultural and animal husbandry waste according to claim 1 is characterized in that: The primary carbonization kettle is a tank body with a sandwich structure, and a heat conducting pipe is arranged in the sandwich to surround the inner layer; The two ends of the second heat pipe of the solar collector are connected to the two ends of the heat exchange pipe of the primary carbonization kettle through pipelines, so that the heat transfer oil in the second heat pipe of the solar collector flows into the heat exchange pipe of the primary carbonization kettle, and the heat transfer oil in the heat exchange pipe of the primary carbonization kettle returns to the second heat pipe.

8. The in-situ treatment and carbon fixation device for agricultural and animal husbandry waste according to any one of claims 1 to 3, characterized in that: The carbon-based material comprises hydrothermal carbon obtained after being treated in a microwave carbonization tank.

9. The in-situ treatment and carbon fixation device for agricultural and animal husbandry waste according to claim 1 is characterized in that: A stirring motor and a pressure relief valve are arranged at the top of the primary carbonization kettle; the motor is connected to a stirring shaft, and a U-shaped stirring blade is arranged on the stirring shaft; a discharge port and a cut-off valve are arranged at the bottom of the primary carbonization kettle.

10. The in-situ treatment and carbon fixation device for agricultural and animal husbandry waste according to claim 1, characterized in that: The liquid discharge port of the liquid phase treatment device is connected with the ultraviolet sterilization device through a pipeline.

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