System for adjusting the moisture content of reactants in hydrothermal pyrolysis organic fertilizer

Abstract

This invention provides a system for adjusting the moisture content of reaction raw materials in hydrothermal pyrolysis organic fertilizer. The system includes a straw treatment device, a manure treatment device, a buffer tank, a hydrothermal pyrolysis reactor, a first transfer pump, and a second transfer pump. The straw treatment device processes the straw raw material, and the resulting solid phase is transferred to the hydrothermal pyrolysis reactor, while the liquid phase is transferred to the buffer tank. The manure treatment device processes the manure raw material, and the resulting solid phase is transferred to the hydrothermal pyrolysis reactor, while the liquid phase is transferred to the buffer tank. The first transfer pump draws the supernatant from the hydrothermal pyrolysis reactor to the buffer tank. The second transfer pump transfers the liquid from the buffer tank to the hydrothermal pyrolysis reactor. The moisture content of the reaction raw materials in the hydrothermal pyrolysis reactor is adjusted based on the combined action of the first and second transfer pumps.

Description

Technical Field

[0001] This invention relates to the field of environmental protection equipment, and in particular to a system for adjusting the moisture content of reactants in hydrothermal pyrolysis organic fertilizer. Background Technology

[0002] The method of producing organic fertilizer by hydrothermal pyrolysis involves simultaneously feeding plant crop straw, vegetable waste, branches, and other raw materials such as livestock and poultry manure and slaughter waste into a pyrolysis reactor. Through a certain temperature and pressure, a full hydrothermal pyrolysis reaction is completed, which can completely kill bacteria, viruses, and insect eggs, and completely decompose toxic and harmful substances such as antibiotics and hormones. It is safe, stable, and does not burn seedlings, while retaining a large amount of carbon and nitrogen components, forming high-quality, pure organic, and fully nutritious small-molecule organic solid and liquid fertilizers.

[0003] Current technologies typically involve dehydrating the raw materials before directly feeding them into a hydrothermal pyrolysis reactor for reaction. However, there is a lack of control over the moisture content of the raw materials participating in the reaction within the reactor, and the moisture content of the raw materials has a significant impact on the hydrothermal pyrolysis reaction. These problems urgently need to be addressed. Summary of the Invention

[0004] To address the problems existing in the background art, the present invention provides a system for adjusting the moisture content of reaction raw materials in hydrothermal pyrolysis organic fertilizer, comprising a straw treatment device, a manure treatment device, a buffer tank, a hydrothermal pyrolysis reactor, a first transfer pump, and a second transfer pump; the straw treatment device is used to treat straw raw materials, and the resulting solid phase is transferred to the hydrothermal pyrolysis reactor, while the liquid phase is transferred to the buffer tank; the manure treatment device is used to treat manure raw materials, and the resulting solid phase is transferred to the hydrothermal pyrolysis reactor, while the liquid phase is transferred to the buffer tank; the first transfer pump is used to extract the supernatant from the hydrothermal pyrolysis reactor to the buffer tank; the second transfer pump is used to transfer the liquid in the buffer tank to the hydrothermal pyrolysis reactor; the moisture content of the reaction raw materials in the hydrothermal pyrolysis reactor is adjusted based on the cooperation of the first and second transfer pumps.

[0005] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, a differential pressure gauge is installed on the hydrothermal pyrolysis reactor; the first delivery pump controls the start and stop by comparing the differential pressure count value with a preset value.

[0006] In the system for adjusting the moisture content of the reactants in the hydrothermal pyrolysis organic fertilizer of the present invention, the upper limit of the pressure difference ∆P is experimentally calibrated. max and lower limit ∆P min When ∆P is greater than ∆P max The first delivery pump is started when ∆P is less than ∆P. min Stop the pump.

[0007] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the buffer tank is equipped with a densitometer; the densitometer is used to measure the density of the liquid in the buffer tank; the second delivery pump controls the start and stop by comparing the density count value with a preset value.

[0008] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the density meter sampling point is set at the lower part of the buffer tank.

[0009] In the system for adjusting the moisture content of the reaction raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention, when the measured value of the densitometer is greater than the set value D0, the second delivery pump is started to deliver the slurry in the lower part of the buffer tank to the hydrothermal pyrolysis reactor.

[0010] In the system for adjusting the moisture content of the reactants in hydrothermal pyrolysis organic fertilizer of the present invention, the system further includes a vegetable straw treatment device; the vegetable straw treatment device includes a belt conveyor and a second solid-liquid separator; the belt conveyor is used to transport the vegetable straw transported from the outside to the second solid-liquid separator; the solid phase separated by the second solid-liquid separator is transported to the hydrothermal pyrolysis reactor, and the liquid phase is transported to the buffer tank.

[0011] In the system for adjusting the moisture content of the raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the straw treatment device includes a straw soaking tank, a first scraper conveyor, a first sludge pump, and a first solid-liquid separator; the straw soaking tank is used to soak the straw raw materials, and the soaked straw is conveyed to the hydrothermal pyrolysis reactor by the first scraper conveyor, and the material at the bottom of the straw soaking tank is conveyed to the first solid-liquid separator by the first sludge pump; the solid phase separated by the first solid-liquid separator is conveyed to the hydrothermal pyrolysis reactor, and the liquid phase is conveyed to the buffer tank.

[0012] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the straw soaking tank includes a wetting tank, a soaking tank, a baffle device, a first grid device, a discharge tank, and a third grid device; the wetting tank, the soaking tank, and the discharge tank are connected along the material conveying direction, and the wetting tank and the soaking tank are connected or disconnected by the raising or lowering of the baffle device; the first grid device is disposed in the wetting tank, used to support the straw and can be turned over to convey the straw to the soaking tank; the third grid device is disposed in the soaking tank, used to support the straw conveyed by the first grid device and can be turned over to convey the straw to the discharge tank; the straw in the discharge tank is conveyed to the hydrothermal pyrolysis reactor via the first scraper conveyor; the material at the bottom of the soaking tank is conveyed to the first solid-liquid separator via the first sludge pump.

[0013] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the connecting port of the immersion tank, the soaking tank and the discharge tank is connected to the top of the side wall.

[0014] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the first grid device and the third grid device convey the straw through the connection between the soaking tank and the immersion tank, and between the immersion tank and the discharge tank.

[0015] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the rotation angle range of the first grid device and the third grid device is 0-90°, and they flip from horizontal to vertical.

[0016] In the system for adjusting the moisture content of the raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the third grid device is higher than the bottom surface of the discharge pool.

[0017] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the immersion tank and the soaking tank can be formed by a partition wall with a height less than the height of the tank body set on the bottom surface of a tank body, and the upper part of the partition wall is a connecting opening.

[0018] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the first grid of the first grid device and the third grid of the third grid device are both horizontally arranged and have the same height.

[0019] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the dimensions of the first grid of the first grid device and the third grid of the third grid device are less than or equal to the connecting opening, and are equal to the cross-sectional dimensions of the soaking tank and the immersion tank.

[0020] In the system for adjusting the moisture content of the reaction raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention, when the first grid of the first grid device and the third grid of the third grid device are set in a horizontal direction, they are 20-50cm away from the bottom of their respective pools.

[0021] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the side of the discharge pool is connected to the soaking pool and has a funnel-shaped structure with a larger top and a smaller bottom, and the bottom surface of the discharge pool is higher than the bottom surface of the soaking pool; the horizontal part of the first scraper conveyor is set at the bottom of the discharge pool.

[0022] In the system for adjusting the moisture content of the reactant raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the third grid device includes a third grid and a third tilting power device; the third grid is disposed in the soaking tank and can rotate toward the discharge tank and the side connected to the soaking tank; the third tilting power device is used to drive the third grid to rotate.

[0023] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the third turning power device is a winch.

[0024] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the first grid device includes a first grid and a first turning power device; the first grid is disposed in the immersion tank and divides the immersion tank into upper and lower parts, and is rotatably disposed toward the partition device; the first turning power device is used to drive the first grid to rotate.

[0025] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the first turning power device is a winch.

[0026] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the straw soaking tank further includes a second grid device; the second grid device is disposed in the soaking tank and is used to press the material in the soaking tank below the liquid surface to maintain the soaking state.

[0027] In the system for adjusting the moisture content of the raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the rotation direction of the second grid device is opposite to that of the first grid device.

[0028] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the second grid device includes a second grid and a second flipping power device; one side of the second grid is rotatably connected to the inner wall of the immersion tank; the second flipping power device is used to drive the first grid to rotate.

[0029] In the system for adjusting the moisture content of the raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention, the second turning power device is a winch.

[0030] In the system for adjusting the moisture content of the raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the bottom of the soaking tank has a gradually narrowing funnel-shaped structure.

[0031] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the partition device includes a partition and a lifting power device; the partition is separated between the soaking tank and the immersion tank; the lifting power device is used to drive the partition to rise or fall.

[0032] In the system for adjusting the moisture content of the raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the lifting power device is a screw jack.

[0033] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the partition is inserted into the side walls of the immersion tank and the soaking tank on both sides.

[0034] In the system for adjusting the moisture content of the reactants in hydrothermal pyrolysis organic fertilizer of the present invention, the manure treatment device includes a pre-sedimentation tank and a second soaking tank with the top closed; the bottoms of the pre-sedimentation tank and the second soaking tank are connected, and the material in the pre-sedimentation tank is transported to the second soaking tank through a first conveying device; the pre-sedimentation tank is provided with a feed inlet and a first agitator to agitate the material in the tank; the second soaking tank is provided with a second agitator to agitate the material in the tank; the liquid in the upper part of the second soaking tank is transported to the pre-sedimentation tank through a circulating pump, and the material at the bottom is transported to a third solid-liquid separation device; the solid phase separated by the third solid-liquid separation device is transported to the hydrothermal pyrolysis reactor, and the liquid phase is transported to the buffer tank.

[0035] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the feed inlet of the pre-sedimentation tank is provided with a cover that can be rotated and opened.

[0036] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the bottom outlet of the second soaking tank is located on the side away from the pre-sedimentation tank, and the second soaking tank is inclined toward the bottom outlet to facilitate discharge.

[0037] In the system for adjusting the moisture content of the reaction raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention, the included angle between the impeller blade of the first agitator and the rotating shaft is A, 30°≤A≤90°.

[0038] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the first blade of the first agitator is hinged to the first rotating shaft, and the included angle between the two is continuously adjusted by an adjustment device; the adjustment device includes a flexible rope; one end of the flexible rope is connected to the first blade, and the other end extends out of the pre-sedimentation tank through the inside of the first rotating shaft, and the flexible rope is pulled to change the angle of the first blade.

[0039] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the first rotating shaft has a channel for the flexible rope to pass through.

[0040] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the adjusting device further includes a limiting member; the limiting member is fixed to the flexible rope; the first rotating shaft has a limiting groove for accommodating the limiting member; the limiting groove extends axially along the first rotating shaft, and the rotation angle of the first blade is limited based on the cooperation of the limiting groove and the limiting member.

[0041] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the number of limiting grooves is 2, and they are arranged opposite to each other on the side wall of the first rotating shaft, with both ends of the limiting member located in the limiting groove.

[0042] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the first blade is provided in two pairs, and the two pairs are at a 90° angle to each other.

[0043] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the first blades arranged in pairs are positioned opposite each other on both sides of the first rotating shaft.

[0044] In the system for adjusting the moisture content of the reaction raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention, the first blades arranged in pairs are at the same height or staggered at different heights, preferably at the same height.

[0045] In the system for adjusting the moisture content of the raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the blade is a flat spiral shape.

[0046] In the system for adjusting the moisture content of the reaction raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention, the number of the second stirrers is 2.

[0047] In the system for adjusting the moisture content of the reaction raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention, the angle between the second blade of the second agitator and the second rotating shaft is B, where B is 65°.

[0048] In the system for adjusting the moisture content of the reaction raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention, the second blade is provided in two pairs, and the two pairs are at a 90° angle to each other.

[0049] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the second blades, which are arranged in pairs, are positioned opposite each other on both sides of the second rotating shaft.

[0050] In the system for adjusting the moisture content of the reactants in the hydrothermal pyrolysis organic fertilizer of the present invention, the second blades arranged in pairs are at the same height or staggered at different heights, preferably at the same height.

[0051] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, a scraper device is provided at the bottom of the pre-sedimentation tank; the scraper device is used to transport the sediment deposited in the pre-sedimentation tank out of the pre-sedimentation tank; the lower part of the pre-sedimentation tank has a funnel-shaped structure.

[0052] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, there are multiple scraper devices, and the multiple scraper devices are arranged side by side on the bottom surface of the pre-sedimentation tank.

[0053] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, there are two scraper devices; the bottom width of the pre-sedimentation tank is 0.8-1.2m.

[0054] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the lower part of the pre-sedimentation tank is a funnel-shaped structure with an inclination angle of C, 45°≤C≤60°.

[0055] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the lower part of the pre-sedimentation tank is a funnel-shaped structure including a funnel section and a straight section located below the funnel section, the height of the straight section being 0.4-0.6 m.

[0056] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the first conveying device is set in the pre-sedimentation tank and is a shaftless agitator conveyor.

[0057] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, there are multiple first conveying devices, and the multiple first conveying devices are arranged in parallel along the horizontal direction.

[0058] In the system for adjusting the moisture content of the reaction raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention, the pitch between the blades of the shaftless agitator of the first conveying device is L, and L is 20-300mm.

[0059] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the shaftless agitator is set horizontally.

[0060] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the first conveying device and the first agitator are arranged at intervals in the vertical direction, with the first agitator on top, the distance between the first conveying device and the first agitator is M, and the blade height of the shaftless agitator of the first conveying device is N, where M≥1.5N.

[0061] In the system for adjusting the moisture content of the reaction raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention, the blade height N of the shaftless agitator is 300 mm.

[0062] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the manure treatment device further includes a purification device; the inlet of the purification device is connected to the pre-sedimentation tank and the second soaking tank, and the outlet is connected to the outside.

[0063] In the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention, the purification device includes an induced draft fan and an odor removal device; the inlet of the induced draft fan is connected to the pre-sedimentation tank and the second soaking tank, and the outlet is connected to the inlet of the odor removal device; the outlet of the odor removal device is connected to the outside.

[0064] The beneficial effects of this invention are as follows: The system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer is based on the preliminary treatment of raw materials by a straw treatment device and a manure treatment device. It can adopt a variety of raw materials and perform preliminary control of the moisture content of the raw materials, reducing the moisture content of the raw materials entering the hydrothermal pyrolysis kettle. This helps to reduce the heating amount during the hydrothermal pyrolysis reaction and saves more energy. Based on the buffer tank, the first transfer pump and the second transfer pump working together, the moisture content of the reaction raw materials in the hydrothermal pyrolysis kettle is precisely adjusted to achieve control of the moisture content of the reaction raw materials, thereby achieving the effect of controlling the yield of liquid fertilizer. Attached Figure Description

[0065] Figure 1 This is a schematic diagram of the system for adjusting the moisture content of the reactants in hydrothermal pyrolysis organic fertilizer according to the present invention;

[0066] Figure 2 This is a front view of the straw treatment device of the system for adjusting the moisture content of the reactants in hydrothermal pyrolysis organic fertilizer according to the present invention.

[0067] Figure 3 This is a cross-sectional view of the straw treatment device of the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer according to the present invention.

[0068] Figure 4 This is a top view of the straw treatment device of the system for adjusting the moisture content of the reactants in hydrothermal pyrolysis organic fertilizer according to the present invention.

[0069] Figure 5 This is a right view of the straw treatment device of the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer according to the present invention.

[0070] Figure 6 This is a schematic diagram of the manure treatment device of the straw treatment device of the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention (showing the internal structure).

[0071] Figure 7This is a schematic diagram of the structure of the first stirring paddle of the manure treatment device of the straw treatment device of the system for adjusting the moisture content of the reaction raw materials in the hydrothermal pyrolysis organic fertilizer of the present invention.

[0072] Figure 8 This is a top view of the first stirring paddle of the manure treatment device of the straw treatment device of the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention.

[0073] Figure 9 This is a schematic diagram of the shaftless agitator of the straw treatment device and the manure treatment device of the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention.

[0074] Legend: 1. Straw treatment device; 11. Straw soaking tank; 111. Immersion tank; 112. Soaking tank; 113. Baffle device; 1131. Baffle; 1132. Lifting power device; 114. First grid device; 1141. First grid; 1142. First tilting power device; 117. Second grid device; 1171. Second grid; 1172. Second tilting power device; 116. Discharge tank; 115. Third grid device; 1151. Third grid; 1152. Third tilting power device; 12. First scraper conveyor; 13. First sludge pump; 14. First solid-liquid separator; 2. Manure treatment device; 21. Pre-sedimentation tank; 22. Second soaking tank; 23. First conveying device; 231. Shaftless agitator; 232. Third motor; 24. First agitator; 24 1. First stirring paddle; 2411. First blade; 2412. First rotating shaft; 24121. Limiting groove; 2413. Adjusting device; 24131. Flexible rope; 24132. Limiting component; 242. First motor; 25. Second stirrer; 251. Second stirring paddle; 2511. Second blade; 2512. Second rotating shaft; 252. Second motor; 26. Circulating pump; 27. Purification device; 271. Exhaust fan; 272. Deodorizing device; 29. ​​Scraper device; 30. Third solid-liquid separation device; 301. Second sludge pump; 3. Buffer tank; 31. Densitometer; 4. Hydrothermal pyrolysis reactor; 41. Differential pressure gauge; 5. First conveying pump; 6. Second conveying pump; 7. Vegetable straw treatment device; 71. Second scraper conveyor; 72. Second solid-liquid separator; 8. Third scraper conveyor. Detailed Implementation

[0075] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0076] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings of this application are intended to cover non-exclusive inclusion.

[0077] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0078] The following describes in detail, with reference to the accompanying drawings, a system for adjusting the moisture content of reactants in hydrothermal pyrolysis organic fertilizer according to the present invention.

[0079] like Figure 1 As shown, a system for adjusting the moisture content of reaction raw materials in hydrothermal pyrolysis organic fertilizer includes a straw treatment device 1, a manure treatment device 2, a buffer tank 3, a hydrothermal pyrolysis reactor 4, a first transfer pump 5, and a second transfer pump 6. The straw treatment device 1 is used to treat straw raw materials, and the resulting solid phase is transported to the hydrothermal pyrolysis reactor 4, while the liquid phase is transported to the buffer tank 3. The manure treatment device 2 is used to treat manure raw materials, and the resulting solid phase is transported to the hydrothermal pyrolysis reactor 4, while the liquid phase is transported to the buffer tank 3. Specifically, the solid phases obtained from the straw treatment device 1 and the manure treatment device 2 are transported to the hydrothermal pyrolysis reactor 4 via a third scraper conveyor 8. The first transfer pump 5 is used to extract the supernatant from the hydrothermal pyrolysis reactor 4 to the buffer tank 3. The second transfer pump 6 is used to transport the liquid from the buffer tank 3 to the hydrothermal pyrolysis reactor 4. The moisture content of the reaction raw materials in the hydrothermal pyrolysis reactor 4 is adjusted based on the cooperation of the first transfer pump 5 and the second transfer pump 6.

[0080] The system for adjusting the moisture content of reaction raw materials in hydrothermal pyrolysis organic fertilizer of the present invention is based on the preliminary treatment of raw materials by a straw treatment device and a manure treatment device. It can adopt a variety of raw materials and perform preliminary control of the moisture content of the raw materials. Reducing the moisture content of the raw materials entering the hydrothermal pyrolysis reactor helps to reduce the heating amount during the hydrothermal pyrolysis reaction, which is more energy-efficient. Based on the cooperation of a buffer tank, a first transfer pump and a second transfer pump, the moisture content of the reaction raw materials in the hydrothermal pyrolysis reactor is precisely adjusted to achieve control of the moisture content of the reaction raw materials (too low moisture content or uneven moisture content of raw materials will affect the degree of hydrothermal pyrolysis, thus affecting the quality of solid organic fertilizer; too high moisture content will reduce the yield of solid fertilizer, increase energy consumption, and reduce the concentration of beneficial components in liquid fertilizer), thereby achieving the effect of controlling the yield of liquid fertilizer.

[0081] In some embodiments, such as Figure 1 As shown, a differential pressure gauge 41 is installed on the hydrothermal pyrolysis reactor 4; the first delivery pump 5 controls the start and stop by comparing the value of the differential pressure gauge 41 with the preset value; the differential pressure gauge 41 is used to control the moisture content of the material in the reactor, making the moisture content control more intuitive and accurate.

[0082] Specifically, the upper limit ∆P of the pressure difference (the pressure tapping point is the upper gas phase space of the hydrothermal pyrolysis reactor 4 and a certain distance below the material after feeding is completed (the specific selection depends on the operating conditions and does not affect the control of water content based on pressure difference in this invention) was determined through experiments. max and lower limit ∆P min When ∆P is greater than ∆P min The first delivery pump 5 is started when ∆P is less than ∆P. min Pump stop; specifically, the hydrothermal pyrolysis reactor 4 is fed with material at its maximum moisture content (the feed amount to the hydrothermal pyrolysis reactor 4 is the same each time), to obtain the upper limit of the pressure difference ∆P. max Value; Lower limit of differential pressure ∆P min The upper limit ∆P max 90%.

[0083] In some embodiments, such as Figure 1 As shown, the buffer tank 3 is equipped with a densitometer 31; the densitometer 31 is used to measure the density of the liquid in the buffer tank 3; the second transfer pump 6 controls the start and stop by comparing the value of the densitometer 31 with the preset value, and replenishes the liquid in the buffer tank 3 into the hydrothermal pyrolysis reactor 4, on the one hand reducing the external water replenishment; on the other hand, by replenishing the liquid phase into the hydrothermal pyrolysis reactor 4, the moisture content of the raw materials in the reactor can also be adjusted; based on the cooperation of the first transfer pump 5 and the second transfer pump 6, the moisture content of the raw materials in the hydrothermal pyrolysis reactor 4 can be adjusted more accurately; preferably, a grid plate is set in the buffer tank 3, and the measuring point of the densitometer 31 is located below the grid plate, and the clean water filtered by the grid is used as the replenishment water source, which makes the moisture content adjustment faster.

[0084] Specifically, the sampling point of the densitometer 31 is set at the bottom of the buffer tank 3. When the measured value of the densitometer 31 is greater than the set value D0 (generally 1.05-1.10), the second delivery pump 6 is started to transport the slurry in the lower part of the buffer tank 3 to the hydrothermal pyrolysis reactor 4.

[0085] Furthermore, a differential pressure gauge 41 is installed on the hydrothermal pyrolysis reactor 4; the first delivery pump 5 also controls its start and stop by comparing the value of the differential pressure gauge 41 with a preset value; when the differential pressure inside the hydrothermal pyrolysis reactor 4 exceeds the upper limit ∆Pmax, it stops working, and when the differential pressure inside the hydrothermal pyrolysis reactor 4 is less than the lower limit ∆Pmin, the second delivery pump 6 is restarted. The upper limit ∆Pmax and the lower limit ∆Pmin are determined in the same way as above; that is, the start of the second delivery pump 6 is controlled by both the density gauge 31 signal and the differential pressure gauge 41 signal of the hydrothermal pyrolysis reactor 4. The density gauge 31 signal and the differential pressure gauge 41 signal are ANDed to control the second delivery pump 6.

[0086] In some embodiments, such as Figure 1 As shown, the system for adjusting the moisture content of the reaction raw materials in hydrothermal pyrolysis organic fertilizer also includes a vegetable straw treatment device 7; the vegetable straw treatment device 7 includes a belt conveyor 71 and a second solid-liquid separator 72 (specifically a screw extruder, such as model CZLY-400); the belt conveyor 71 is used to transport the vegetable straw transported from the outside to the second solid-liquid separator 72; the solid phase separated by the second solid-liquid separator 72 is transported to the hydrothermal pyrolysis reactor 4, and the liquid phase is transported to the buffer tank 3; based on the setting of the vegetable straw treatment device 7, the source of raw materials is further broadened.

[0087] In some embodiments, such as Figure 2 , 3 As shown in Figure 4, the straw treatment device 1 includes a straw soaking tank 11, a first scraper conveyor 12, a first sludge pump 13, and a first solid-liquid separator 14 (specifically a screw extruder, such as model CZLY-400). The straw soaking tank 11 is used to soak straw raw materials (such as dry biomass such as crop straw and plant branches). After soaking, the straw is conveyed to the hydrothermal pyrolysis reactor 4 by the first scraper conveyor 12. The material at the bottom of the straw soaking tank 11 is conveyed to the first solid-liquid separator 14 by the first sludge pump 13. The solid phase separated by the first solid-liquid separator 14 is conveyed to the hydrothermal pyrolysis reactor 4, and the liquid phase is conveyed to the buffer tank 3. Based on the straw soaking tank 11, the straw is fully soaked and then dehydrated by the first solid-liquid separator 14 to obtain raw materials with more uniform moisture content. When using this raw material for hydrothermal pyrolysis reaction, on the one hand, it is beneficial to adjust the moisture content of the raw material in the hydrothermal pyrolysis reactor, and on the other hand, the consistency of the reaction degree in each part of the hydrothermal pyrolysis reactor is better.

[0088] Specifically, the straw soaking tank 11 includes a soaking tank 111, a soaking tank 112, a baffle device 113, a first grid device 114, a discharge tank 116, and a third grid device 115; the soaking tank 111, the soaking tank 112, and the discharge tank 116 are connected along the material conveying direction (preferably, the connecting openings of the soaking tank 111, the soaking tank 112, and the discharge tank 116 are connected to the top of the side wall, thereby facilitating material conveying; the soaking tank 111 and the soaking tank 112 can be formed by a partition wall with a height less than the height of the tank body set on the inner bottom surface of a tank body, with the connecting opening above the partition wall; the discharge tank 116 can be formed by the outward expansion of the side wall of the soaking tank 112), and the soaking tank 111 and the soaking tank 112 are connected or disconnected by the raising or lowering of the baffle device 113; the first grid device 114 is set in the soaking tank 111 to support the straw and can be turned over to convey the straw to the soaking tank 112; the third grid device 115 is set in the... The soaking tank 112 is used to support the straw conveyed by the first grid device 114 and can be turned over to convey the straw to the discharge tank 116. Specifically, the first grid device 114 and the third grid device 115 convey the straw through the connecting ports of the immersion tank 111 and the soaking tank 112, and the soaking tank 112 and the discharge tank 116. The straw in the discharge tank 116 is conveyed to the hydrothermal pyrolysis reactor 4 by the first scraper conveyor 12. The material at the bottom of the soaking tank 112 is conveyed to the first solid-liquid separator 14 by the first sludge pump 13 (preferably, the bottom of the soaking tank 112 has a tapered funnel-shaped structure to facilitate discharge). The straw soaking tank of the present invention divides the soaking process into two stages based on the setting of the immersion tank and the soaking tank, which can be controlled separately. Based on the turning and conveying of the first grid device and the third grid device, the residence time of the straw raw material in the tank is consistent, thereby ensuring a higher consistency of the moisture content of the raw material after soaking.

[0089] Specifically, the rotation angle range of the first grid device 114 and the third grid device 115 is 0-90°, and they flip from horizontal to vertical.

[0090] Preferably, the third grid device 115 is higher than the bottom surface of the discharge pool 116. This arrangement is beneficial for completely transferring the material in the soaking pool 112 to the discharge pool 116.

[0091] In some embodiments, such as Figure 3 As shown, the first grid 1141 of the first grid device 114 and the third grid 1151 of the third grid device 115 are both horizontally arranged and at the same height. When the first grid 1141 of the first grid device 114 and the third grid 1151 of the third grid device 115 are arranged horizontally, they are 20-50cm away from the bottom of their respective pools; this facilitates the separation of soil from the straw raw material.

[0092] In some embodiments, the dimensions of the first grid 1141 of the first grid device 114 and the third grid 1151 of the third grid device 115 are less than or equal to the size of the connecting opening; preferably, they are equal to the size of the connecting opening, thereby facilitating the transfer of straw; and, more preferably, the dimensions of the first grid 1141 and the third grid 1151 are equal to the cross-sectional dimensions of the soaking tank 111 and the soaking tank 112, thereby preventing the material from falling under the first grid 1141 and the third grid 1151 when dumping the straw raw material.

[0093] In some embodiments, such as Figure 3 , 4 As shown in Figure 5, the discharge pool 116 is connected to the soaking pool 112 on the side and has a funnel-shaped structure with a larger top and a smaller bottom. The bottom surface of the discharge pool 116 is higher than the bottom surface of the soaking pool 112. The horizontal part of the first scraper conveyor 12 is set at the bottom of the discharge pool 116.

[0094] In some embodiments, such as Figure 3 As shown, the third grid device 115 includes a third grid 1151 and a third tilting power device 1152. The third grid 1151 is disposed in the soaking tank 112 and is at a certain distance from the bottom of the tank, so that impurities such as soil in the straw raw material fall below the third grid 1151 during the turning and material transfer process. The third grid 1151 can rotate toward the side connecting the discharge tank 116 and the soaking tank 112, such as being rotatably connected to the inner wall of the soaking tank 112, and the rotatable connection position is close to or located inside the connecting opening. The third tilting power device 1152 is used to drive the third grid 1151 to rotate. Specifically, the third tilting power device 1152 is a winch. Preferably, there are two third tilting power devices 1152, symmetrically arranged on both sides of the third grid 1151. Based on the symmetrical arrangement of the third tilting power devices 1152, the consistency of the tilting on both sides when driving the third grid 1151 to tilt is better.

[0095] In some embodiments, such as Figure 3 As shown, the first grid device 114 includes a first grid 1141 and a first tilting power device 1142. The first grid 1141 is disposed in the immersion tank 111, dividing the immersion tank 111 into upper and lower parts, and is rotatably disposed toward the partition device 113, such as being rotatably connected to the inner wall of the immersion tank 111, with the rotatable connection position close to or within the connecting opening. The first tilting power device 1142 is used to drive the first grid 1141 to rotate. Specifically, the first tilting power device 1142 is a winch, and preferably, there are two first tilting power devices 1142, symmetrically disposed on both sides of the first grid 1141. Based on the symmetrical arrangement of the first tilting power devices 1142, the consistency of the tilting on both sides is better when the first grid 1141 is tilted.

[0096] In some embodiments, such as Figure 3As shown, the straw soaking tank 11 also includes a second grid device 117; the second grid device 117 is disposed in the soaking tank 111 and is used to press the material in the soaking tank 111 below the liquid surface to maintain the soaking state.

[0097] Specifically, the rotation direction of the second grid device 117 is opposite to that of the first grid device 114. The second grid device 117 includes a second grid 1171 and a second tilting power device 1172; one side of the second grid 1171 is rotatably connected to the inner wall of the immersion tank 111; the second tilting power device 1172 is used to drive the first grid 1141 to rotate. Specifically, the second tilting power device 1172 is a winch; preferably, there are two second tilting power devices 1172, symmetrically arranged on both sides of the second grid 1171. Based on the symmetrical arrangement of the second tilting power devices 1172, the consistency of the tilting on both sides when driving the second grid 1171 to tilt is better.

[0098] In some embodiments, such as Figure 3 As shown, the partition device 113 includes a partition 1131 and a lifting power device 1132; the partition 1131 separates the immersion tank 111 and the soaking tank 112; the lifting power device 1132 is used to drive the partition 1131 to rise or fall. The lifting power device 1132 is a screw jack or a boom. The partition 1131 is inserted into the side walls of the immersion tank 111 and the soaking tank 112 on both sides (specifically, at the connection between the side walls of the immersion tank 111 and the soaking tank 112).

[0099] The working steps of the straw processing device 1 of the present invention are as follows:

[0100] When preparing to feed, the third grid 1151 of the third grid device 115 is flipped to 90° and placed in a vertical position, the first grid 1141 of the first grid device 114 is kept in a horizontal position, the second grid 1171 of the second grid device 117 is kept in a horizontal position, and the partition 1131 of the partition device 113 is in a lowered position to isolate the soaking tank and the immersion tank.

[0101] Start feeding by adding straw raw materials into the soaking tank 111. After feeding is complete, rotate the third grid 1151 to a horizontal position to press the straw raw materials below the liquid surface of the soaking tank 111 and soak for 30-60 minutes (the specific soaking time depends on the type of raw material; 60 minutes for woody materials and 30 minutes for herbaceous materials).

[0102] After the straw raw material is soaked in the soaking tank 111, the third grid 1151 is rotated 90° to a vertical position, the partition 1131 of the partition device 113 is raised, and the first grid 1141 is rotated 90° to transport the straw raw material soaked in the soaking tank 111 to the second grid 1171 of the second grid device 117 in the soaking tank 112. The partition 1131, the third grid device 115 and the first grid device 114 are then reset.

[0103] The raw straw is soaked in soaking tank 112 for 2-4 hours. After soaking, the second grid 1171 of the second grid device 117 is flipped, and at the same time the first scraper conveyor 12 works. While the second grid device 117 turns the soaked straw to the discharge tank 116, the straw raw material is transported to the hydrothermal pyrolysis reactor 4. The material at the bottom of the soaking tank 112 is transported to the first solid-liquid separator 14 through the first sludge pump 13. After soaking is completed, the second grid device 117 is reset.

[0104] In some embodiments, such as Figure 6 As shown, the sewage treatment device 2 includes a pre-sedimentation tank 21 with a closed top and a second soaking tank 22; the bottoms of the pre-sedimentation tank 21 and the second soaking tank 22 are connected, and the material in the pre-sedimentation tank 21 is transported to the second soaking tank 22 through a first conveying device 23; the pre-sedimentation tank 21 is provided with a feed inlet, specifically, the feed inlet of the pre-sedimentation tank 21 is provided with a cover plate that can be rotated and opened; the pre-sedimentation tank 21 is provided with a first agitator 24 to agitate the material in the tank; the second soaking tank 22 is provided with a second agitator 25 to agitate the material in the tank; the liquid in the upper part of the second soaking tank 22 is transported to the pre-sedimentation tank 21 through a circulating pump 26, and the material at the bottom is transported to a third solid-liquid separation device 30; the solid phase separated by the third solid-liquid separation device 30 is transported to a hydrothermal pyrolysis reactor 4, and the liquid phase is transported to a buffer tank 3.

[0105] Preferably, the bottom outlet of the second soaking tank 22 is located on the side away from the pre-sedimentation tank 21, and the second soaking tank 22 is inclined toward the bottom outlet with an inclination angle of K (angle with the horizontal direction), 15°≤K≤30°, so as to facilitate discharge.

[0106] The manure treatment device of the present invention, based on the setting of a pre-sedimentation tank and a second soaking tank, removes impurities such as mud and stones from the manure raw materials. The first agitator and the first conveying device work together to improve the impurity removal rate. With the addition of the second agitator, the impurity removal rate can reach more than 95% (based on the sand and gravel content in the feed of 2-5%). The manure treatment device of the present invention can also be used for straw soaking, which can effectively shorten the straw soaking time. It only takes 3-4 hours to soak dry straw to achieve saturated moisture content (conventional processes require 6-12 hours).

[0107] In some embodiments, such as Figure 6 As shown, the included angle between the blade 2411 of the stirring paddle 241 of the first stirrer 24 and the rotating shaft 2412 is A, 30°≤A≤90°; if the angle is too small, the stirring effect will be poor; the first motor 242 of the first stirrer 24 is selected as a variable speed motor.

[0108] In some embodiments, such as Figure 7 As shown, the first blade 2411 of the first agitator 24's first agitator 24 is hinged to the first rotating shaft 2412 (e.g., by a hinge), and the included angle between them is continuously adjusted by the adjusting device 2413 (specifically, the angle is adjusted according to the material viscosity; the higher the viscosity, the smaller the angle). The adjusting device 2413 includes a flexible rope 24131. One end of the flexible rope 24131 is connected to the first blade 2411, and the other end extends out of the pre-sedimentation tank 21 through the inside of the first rotating shaft 2412 (a steel pipe can be selected as the first rotating shaft, or the first rotating shaft 2412 has a channel for the flexible rope 24131 to pass through). Pulling the flexible rope 24131 changes the angle of the first blade 2411. Specifically, after adjusting the angle, the end of the flexible rope is fixed, such as by fixing it to the first rotating shaft or by other fixing methods.

[0109] In some embodiments, such as Figure 7 As shown, the adjustment device 2413 also includes a limiting member 24132 (such as a limiting rod structure); the limiting member 24132 is fixed to the flexible rope 24131; the first rotating shaft 2412 has a limiting groove 24121 for accommodating the limiting member 24132; the limiting groove 24121 extends axially along the first rotating shaft 2412, and the rotation angle of the first blade 2411 is limited based on the cooperation of the limiting groove 24121 and the limiting member 24132.

[0110] Specifically, there are two limiting grooves 24121, which are arranged opposite to each other on the side wall of the first rotating shaft 2412, and the two ends of the limiting member 24132 are located in the limiting grooves 24121.

[0111] In some embodiments, such as Figure 6 and 8 As shown, there are two pairs of first blades 2411, and the two pairs are at a 90° angle to each other. The paired first blades 2411 are arranged opposite each other on both sides of the first rotating shaft 2412. The paired first blades 2411 are arranged at the same height or staggered at different heights, preferably at the same height. This can achieve a more uniform stirring effect and promote the discharge of impurities.

[0112] In some embodiments, such as Figure 7 As shown, the blade 2411 is a flat spiral type (that is, formed by twisting a long strip plate; blades with this structure have moderate resistance and better stirring effect).

[0113] In some embodiments, such as Figure 6 As shown, there are two second agitators 25. The two second agitators 25 agitate the material in the second soaking tank 22, which improves the separation effect of impurities in the material and improves the efficiency of straw soaking when used to process straw material.

[0114] In some embodiments, such as Figure 6 As shown, the angle between the second blade 2511 of the second stirring paddle 251 of the second stirrer 25 and the second rotating shaft 2512 is B, where B is 65°. Preferably, the second blade 2511 is a flat spiral shape. The second stirring paddle 251 is driven to rotate by the second motor 252. The structure of the second stirring paddle 251 is the same as that of the first stirring paddle, except that the second blade 2511 has a fixed angle.

[0115] In some embodiments, such as Figure 8 As shown, there are two pairs of second blades 2511, with the two pairs forming a 90° angle. Specifically, the paired second blades 2511 are arranged opposite each other on both sides of the second rotating shaft 2512. The paired second blades 2511 are of the same height or staggered at different heights, preferably of the same height. This results in a more uniform stirring effect, promoting the discharge of impurities and achieving a more thorough soaking process.

[0116] In some embodiments, such as Figure 6 As shown, a scraper device 29 is provided at the bottom of the pre-sedimentation tank 21; the scraper device 29 is used to transport the sediment deposited in the pre-sedimentation tank 21 out of the pre-sedimentation tank 21; the lower part of the pre-sedimentation tank 21 has a funnel-shaped structure.

[0117] Preferably, there are multiple scraper devices 29 arranged side by side on the bottom surface of the pre-sedimentation tank 21. Using multiple scraper devices reduces the width of a single scraper device, preventing damage due to excessive width. Specifically, there are two scraper devices 29; the bottom width of the pre-sedimentation tank 21 is 0.8-1.2m.

[0118] In a further preferred embodiment, in order to promote the discharge of materials from the pre-sedimentation tank, the lower part of the pre-sedimentation tank 21 is a funnel-shaped structure with an inclination angle of C, 45°≤C≤60°; if the angle is too small, it will cause material accumulation, and if it is too large, it will cause the tank volume to decrease.

[0119] The lower part of the pre-sedimentation tank 21 has a funnel-shaped structure, including a funnel section and a straight section located below the funnel section. The height of the straight section is 0.4-0.6 m.

[0120] In some embodiments, such as Figure 6As shown, the first conveying device 23 is installed in the pre-sedimentation tank 21 and is a shaftless agitator conveyor. The shaftless agitator is used to convey the material in the pre-sedimentation tank, which can promote the separation of impurities in the material and make them fall to the bottom of the tank. On the other hand, it can ensure the conveying effect and cause less disturbance to the tank. When used in conjunction with the first agitator, it can effectively improve the impurity removal (sand and gravel) effect and ensure the conveying effect.

[0121] Preferably, there are multiple first conveying devices 23, which are arranged in parallel along the horizontal direction.

[0122] In some embodiments, such as Figure 9 As shown, the pitch between the blades of the shaftless stirring cage 231 of the first conveying device 23 is L, which is 20-300mm. If the pitch is too small, it will not be conducive to material conveying, and if it is too large, it will reduce the sand settling effect. The shaftless stirring cage 231 is driven to rotate by the third motor 232.

[0123] In some embodiments, such as Figure 6 As shown, the first conveying device 23 and the first agitator 24 are arranged vertically at intervals, with the first agitator 24 on top. Specifically, the axis of the shaftless stirring cage 231 is set horizontally, such as parallel to the bottom surface of the pre-sedimentation tank 21. In this configuration, the first rotating shaft 242 of the first agitator is perpendicular to the axis of the shaftless stirring cage 231. The material stirred by the first agitator moves downwards and then changes direction to move horizontally after passing through the shaftless stirring cage 231. Based on this, the material is effectively dispersed to effectively remove impurities. Preferably, the distance between the first conveying device 23 and the first agitator 24 is M, and the blade height of the shaftless stirring cage 231 of the first conveying device 23 is N, where M ≥ 1.5N. Under this spacing condition, it can be ensured that the first conveying device 23 and the first agitator 24 do not interfere with each other, ensuring the sedimentation effect. Specifically, the blade height N of the shaftless stirring cage 231 is 300mm.

[0124] In some embodiments, such as Figure 6 As shown, the sewage treatment device 2 also includes a purification device 27; the inlet of the purification device 27 is connected to the pre-sedimentation tank 21 and the second soaking tank 22, and the outlet is connected to the outside.

[0125] In some embodiments, the purification device 27 includes an exhaust fan 271 and a deodorization device 272 (e.g., an activated carbon adsorption device); the inlet of the exhaust fan 271 is connected to the pre-sedimentation tank 21 and the second soaking tank 22, and the outlet is connected to the inlet of the deodorization device 272; the outlet of the deodorization device 272 is connected to the outside.

[0126] The working steps of the sewage treatment device 2 of the present invention are as follows:

[0127] For feeding preparation, adjust the included angle of the first agitator 241 of the first agitator 24 to the minimum angle (30°); start the first agitator 24 at a speed of 3-5 rpm, start the first conveyor device 23 at a speed of 6-12 rpm; start the second agitator 25 at a speed of 3-6 rpm (the second agitator 25 operates intermittently, with a running time to stopping time ratio of 1:(10-12)).

[0128] Feeding begins when material is introduced into the pre-sedimentation tank 21 through the inlet. The circulation pump 26 is started to draw liquid from the upper part of the second soaking tank 22 into the pre-sedimentation tank 21, forming a circulation of liquid phase from the pre-sedimentation tank 21 to the second soaking tank 22. After being stirred by the first agitator 24, the material flows with the liquid phase to the first conveying device 23. After passing through the shaftless agitator 231, the material is conveyed from the pre-sedimentation tank 21 to the second soaking tank 22. During the feeding process, the liquid phase is replenished to the pre-sedimentation tank 31 through the buffer tank 3 to control the moisture content of the material at 80±2%.

[0129] After soaking for 4-6 hours, the material is transported to the second soaking tank 22 and then transported by the second sludge pump 301 to the third solid-liquid separation device 30.

Claims

1. A system for adjusting the moisture content of a reaction feedstock in a hydrothermal lysis of an organic manure, characterized by, The system comprises a straw treatment device (1), a manure treatment device (2), a buffer tank (3), a hydrothermal cracking kettle (4), a first conveying pump (5) and a second conveying pump (6); The straw treatment device (1) is used for treating straw raw materials, and the treated solid phase is conveyed to the hydrothermal cracking kettle (4), and the liquid phase is conveyed to the buffer tank (3); The manure treatment device (2) is used for treating manure raw materials, and the treated solid phase is conveyed to the hydrothermal cracking kettle (4), and the liquid phase is conveyed to the buffer tank (3); The first conveying pump (5) is used for pumping supernatant in the hydrothermal cracking kettle (4) to the buffer tank (3); The second conveying pump (6) is used for conveying liquid in the buffer tank (3) to the hydrothermal cracking kettle (4); The reaction raw materials in the hydrothermal cracking kettle (4) are adjusted based on the cooperation of the first conveying pump (5) and the second conveying pump (6) to adjust the moisture content of the reaction raw materials.

2. The system for adjusting the moisture content of the reaction raw material water in the hydrothermal decomposition of organic manure according to claim 1, characterized by, The hydrothermal cracking kettle (4) is provided with a differential pressure gauge (41); the first conveying pump (5) is controlled to start or stop by comparing the value of the differential pressure gauge (41) with a preset value.

3. The system for adjusting the moisture content of the reaction raw material water in the hydrothermal decomposition of organic manure according to claim 1, characterized by, The buffer tank (3) is provided with a densimeter (31); the densimeter (31) is used for measuring the density of the liquid in the buffer tank (3); and the second conveying pump (6) is controlled to start or stop by comparing the value of the densimeter (31) with a preset value.

4. The system for adjusting the moisture content of the reaction raw material water in the hydrothermal decomposition of organic fertilizer according to claim 1, characterized by, The system for adjusting the moisture content of reaction raw materials in hydrothermal cracking organic fertilizer further comprises a vegetable straw treatment device (7); The vegetable straw treatment device (7) comprises a belt conveyor (71) and a second solid-liquid separator (72); The belt conveyor (71) is used for conveying the vegetable straw delivered from outside to the second solid-liquid separator (72); The solid phase separated by the second solid-liquid separator (72) is conveyed to the hydrothermal cracking kettle (4), and the liquid phase is conveyed to the buffer tank (3).

5. The system for adjusting the moisture content of the reaction raw material water in the hydrothermal decomposition of organic manure according to claim 1, characterized by, The straw treatment device (1) comprises a straw soaking tank (11), a first scraper conveyor (12), a first sludge pump (13) and a first solid-liquid separator (14); The straw soaking tank (11) is used for soaking straw raw materials, and the soaked straw is conveyed to the hydrothermal cracking kettle (4) through the first scraper conveyor (12), and the material at the bottom of the straw soaking tank (11) is conveyed to the first solid-liquid separator (14) through the first sludge pump (13); The solid phase separated by the first solid-liquid separator (14) is conveyed to the hydrothermal cracking kettle (4), and the liquid phase is conveyed to the buffer tank (3).

6. The system for adjusting the moisture content of the reaction raw material water in the hydrothermal decomposition of organic manure according to claim 5, characterized by, The straw soaking tank (11) comprises a soaking tank (112), a baffle device (113), a first grid device (114), a discharge tank (116) and a third grid device (115); The soaking tank (112), the discharge tank (116) and the baffle device (113) are communicated along the material conveying direction, and the soaking tank (112) and the baffle device (113) are communicated or not communicated by rising or falling of the baffle device (113). The first grid device (114) is arranged in the soaking pool (111) and is used for supporting the straw and can be turned over to deliver the straw to the soaking pool (112); The third grid device (115) is arranged in the soaking pool (112) and is used for supporting the straw delivered by the first grid device (114) and can be turned over to deliver the straw to the discharge pool (116); The straw in the discharge pool (116) is delivered to the hydrothermal cracking kettle (4) through the first scraper conveyor (12); The material at the bottom of the soaking pool (112) is delivered to the first solid-liquid separator (14) through the first sludge pump (13).

7. The system for adjusting the moisture content of the reaction raw material water in the hydrothermal decomposition of organic manure according to claim 6, characterized by, The third grid device (115) comprises a third grid (1151) and a third turning power device (1152); The third grid (1151) is arranged in the soaking pool (112) and can be turned towards the communication side of the discharge pool (116) and the soaking pool (112); The third turning power device (1152) is used for driving the third grid (1151) to turn.

8. The system for adjusting the moisture content of the reaction raw material water in the hydrothermal decomposition of organic manure according to claim 6, characterized by, The first grid device (114) comprises a first grid (1141) and a first turning power device (1142); The first grid (1141) is arranged in the soaking pool (111) and divides the soaking pool (111) into upper and lower parts and can be turned towards the partition device (113); The first turning power device (1142) is used for driving the first grid (1141) to turn.

9. The system for adjusting the moisture content of the reaction raw material water in the pyrolysis of organic manure according to claim 6, characterized in that, The straw soaking pool (11) further comprises a second grid device (117); The second grid device (117) is arranged in the soaking pool (111) and is used for pressing the material in the soaking pool (111) below the liquid surface to maintain the soaking state.

10. The system for adjusting the moisture content of the reaction raw material water in the hydrothermal decomposition of organic fertilizer according to claim 9, characterized by, The second grid device (117) comprises a second grid (1171) and a second turning power device (1172); One side of the second grid (1171) is turnably connected to the inner wall of the soaking pool (111); The second turning power device (1172) is used for driving the first grid (1141) to turn.

11. The system for adjusting the moisture content of the reaction raw material water in the pyrolysis of organic manure according to claim 6, characterized in that, The partition device (113) comprises a partition (1131) and a lifting power device (1132); The partition (1131) is arranged between the soaking pool (111) and the soaking pool (112); The lifting power device (1132) is used for driving the partition (1131) to ascend or descend.

12. The system for adjusting moisture content of a reaction raw material water in a hydrothermal decomposition organic fertilizer according to claim 1, characterized in that, The fecal treatment device (2) comprises a top-closed pre-sedimentation pool (21) and a second soaking pool (22); The pre-sedimentation pool (21) and the second soaking pool (22) are communicated at the bottom, and the material in the pre-sedimentation pool (21) is delivered to the second soaking pool (22) through a first conveying device (23); The pre-sedimentation pool (21) is provided with a feeding port and a first agitator (24) for agitating the material in the pool; The second soaking pool (22) is provided with a second agitator (25) for agitating the material in the pool; The upper liquid of the second soaking pool (22) is delivered to the pre-sedimentation pool (21) by a circulating pump (26), and the bottom material is delivered to a third solid-liquid separation device (30); The solid phase separated by the third solid-liquid separation device (30) is delivered to the hydrothermal cracking kettle (4), and the liquid phase is delivered to the buffer pool (3).

13. The system for adjusting the moisture content of the reaction raw material water in the pyrolysis of organic manure according to claim 12, characterized in that, The included angle between the paddle (2411) of the stirring paddle (241) of the first stirrer (24) and the rotating shaft (2412) is A, and 30°≤A≤90°.

14. The system for adjusting the moisture content of the reaction raw material water in the pyrolysis of organic manure according to claim 13, characterized in that, The first paddle (2411) of the first stirring paddle (241) of the first stirrer (24) is hinged to the first rotating shaft (2412), and the included angle between the two is continuously adjusted by an adjusting device (2413). The adjusting device (2413) comprises a flexible rope (24131). One end of the flexible rope (24131) is connected to the first paddle (2411), and the other end extends out of the pre-sedimentation pool (21) through the inside of the first rotating shaft (2412), and pulling the flexible rope (24131) changes the angle of the first paddle (2411).

15. The system for adjusting the moisture content of the reaction raw material water in the pyrolysis of organic manure according to claim 14, characterized in that, The adjusting device (2413) further comprises a limiting piece (24132); The limiting piece (24132) is fixed to the flexible rope (24131); The first rotating shaft (2412) is provided with a limiting groove (24121) for accommodating the limiting piece (24132); The limiting groove (24121) extends axially along the first rotating shaft (2412), and the rotation angle of the first paddle (2411) is limited based on the cooperation between the limiting groove (24121) and the limiting piece (24132).

16. The system for adjusting the moisture content of the reaction raw material water in the pyrolysis of organic manure according to claim 14, characterized in that, The paddle (2411) is a flat spiral type.

17. The system for adjusting moisture content of a reaction raw material water in a hydrothermal decomposition of an organic fertilizer according to claim 12, characterized by, The angle between the second paddle (2511) of the second stirring paddle (251) of the second stirrer (25) and the second rotating shaft (2512) is B, and B is 65°.

18. The system for adjusting moisture content of a reaction raw material water in a hydrothermal decomposition organic fertilizer according to claim 12, characterized in that, The pre-sedimentation pool (21) is provided with a scraper device (29) at the bottom; The scraper device (29) is used to deliver the deposited silt in the pre-sedimentation pool (21) out of the pre-sedimentation pool (21); The lower part of the pre-sedimentation pool (21) is a funnel structure.

19. The system for adjusting the moisture content of the reaction raw material water in the pyrolysis of organic manure according to claim 12, characterized in that, The first conveying device (23) is arranged in the pre-sedimentation pool (21) and is a shaftless stirring cage conveyor.

20. The system for adjusting moisture content of a reaction raw material water in a hydrothermal decomposition organic fertilizer according to claim 12, characterized in that, The pitch between the blades of the shaftless stirring cage (231) of the first conveying device (23) is L, and L is 20-300mm.

21. The system for adjusting the moisture content of the reaction raw material water in the pyrolysis of organic manure according to claim 19, characterized in that, The first conveying device (23) and the first stirrer (24) are arranged in a vertical direction, the first stirrer (24) is above, the spacing between the first conveying device (23) and the first stirrer (24) is M, the height of the blade of the shaftless stirring cage (231) of the first conveying device (23) is N, and M≥1.5N.

22. The system for adjusting moisture content of a reaction raw material water in a hydrothermal decomposition organic fertilizer according to claim 12, characterized in that, The fecal pollution treatment device (2) further comprises a purification device (27); The inlet of the purification device (27) is communicated with the pre-sedimentation pool (21) and the second soaking pool (22), and the outlet is communicated with the outside.

23. The system for adjusting the moisture content of the reaction raw material water in the pyrolysis of organic manure according to claim 22, characterized in that, The purification device (27) comprises an air suction fan (271) and a deodorization device (272); The air suction fan (271) is communicated with the pre-sedimentation tank (21) and the second soaking tank (22) at the inlet and communicated with the odor removal device (272) at the outlet; The odor removal device (272) is communicated with the outside at the outlet.

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