Organic waste treatment device using subcritical hydrothermal decomposition

Abstract

We provide an organic waste treatment device using subcritical hydrothermal decomposition. [Solution] The system is equipped with two subcritical reaction vessels 1 arranged in parallel, and a feeder 3 for supplying organic waste into the reaction vessel is connected to the top of each vessel. The two reaction vessels are arranged left and right, with a support frame between them. A pretreatment mechanism is provided on the top of the support frame, and this mechanism is connected to the feeder via piping 51. The pretreatment mechanism includes a stirring chamber 52, and a filter 54 is connected to the top of the stirring chamber by a flange 53, and a compression feeder component 6 is provided on the top of the filter. This compression feeder component includes a storage chamber 61 for feeding. The present invention enables the feeding and compression of organic waste, reduces the pretreatment process, improves processing efficiency, and avoids clogging of the piping.

Description

【Technical Field】 【0001】 The present invention belongs to the field of organic waste treatment technologies, and particularly relates to an organic waste treatment apparatus by subcritical hydrothermal decomposition. 【Background Art】 【0002】 With the development of social economy and the improvement of people's living standards, the generation amount of various organic wastes such as livestock and poultry manure, agricultural and forestry wastes, and specific organic chemical wastes is increasing. If these wastes are not properly treated, they will not only occupy a large amount of land resources, but may also cause serious secondary pollution to soil, water quality, and the atmosphere. Therefore, the development of highly efficient, environmentally friendly, and resource-recyclable organic waste treatment technologies has become an important issue in the current environmental protection field. Subcritical water: In a subcritical water environment, the density of water increases and the dissociation coefficient increases. Water acts as a catalyst as a solvent and promotes the decomposition of organic polymers. Starch and proteins are decomposed into glucose and amino acids, and synthetic polymers such as plastic products and natural polymers such as fats and proteins are also decomposed and detoxified. This technology does not require an open flame and uses high temperature, high pressure, and subcritical water. Since it has the same properties as methanol used for decomposed oil, it is suitable for explaining the decomposition characteristics of oil quality. In the temperature range of subcritical water, the ionic surface area of water is large around about 250 °C, and the production ratio of hydrogen ions and hydroxide ions increases. At this time, organic compounds, starch, and proteins are decomposed into amino acids, the degree of low molecularization progresses, and solid powders are liquefied, so it has a very strong decomposition power. It is also possible to decompose and detoxify environmental pollutants. The subcritical water reaction is not a chemical reaction using an organic solvent, but a safe reaction using ordinary water as a solvent. It does not harm the environment, does not generate an open flame, and there is no emission of dioxins, dust, or wastewater in the resource recycling process of organic wastes, and it does not cause secondary pollution to the surrounding environment. Among many processing technologies, hydrothermal reaction technology, particularly subcritical hydrothermal decomposition technology, shows great potential for application. Subcritical water has an extremely low mediating coefficient, high diffusivity and reactivity, and is completely mutually soluble with organic substances. Therefore, it efficiently and completely decomposes organic matter into harmless small molecules while releasing a large amount of thermal energy. Furthermore, its excellent hydrolytic ability allows it to decompose large organic molecules into small molecule products, enabling resource recovery and recycling. However, current hydrothermal treatment systems face numerous technical challenges. First, subcritical reactors are typically installed independently, resulting in large equipment footprints, high energy consumption, and complex systems. Second, organic waste requires multiple pretreatment steps, such as crushing, sieving, and slurry concentration adjustment, before entering the reactor. These steps increase equipment investment and operating costs, as well as reducing overall treatment efficiency. More importantly, current feeding systems are poorly adapted to complex organic waste containing long fibers and hard impurities. These impurities easily clog high-pressure transport pipes and reactor interiors, leading to frequent system shutdowns and maintenance, seriously impacting treatment continuity and the prospects for industrial applications. [Overview of the project] 【0003】 To solve the above problems, the present invention aims to provide an organic waste treatment device using subcritical hydrothermal decomposition that enables the loading and compression of organic waste, reduces pretreatment steps to improve treatment efficiency, and avoids pipeline clogging. 【0004】 The present invention is realized with the following configuration. It is an integrated apparatus for treating organic waste by subcritical hydrothermal decomposition, in which a feed bucket for supplying organic waste to reaction vessels arranged in parallel is connected to the top of two subcritical reaction vessels. The reaction vessels are arranged on the left and right, and a support frame is provided between the two reaction vessels. A pretreatment mechanism is provided on the top of this support frame, and the pretreatment mechanism is connected to the feed bucket via piping. The pretreatment mechanism is equipped with a stirring chamber, and a filter is connected to the top surface of the stirring chamber by a flange. A compression feed component is connected to the top surface of the filter, and this compression feed component includes a feed chamber. A feed pipe is connected to the top surface of the feed chamber, and a corrugated pipe is provided on the bottom surface of the feed pipe, and the corrugated pipe is arranged inside the feed chamber. A compression plate is connected to the end of the corrugated pipe, and the compression plate is provided with an opening corresponding to the outlet end of the corrugated pipe. A solenoid valve is arranged inside this opening, and a lifting mechanism is provided on the outer surface of the feed chamber to enable vertical movement of the compression plate. Furthermore, intake and exhaust pipes are connected to the upper surfaces of the two parallel-arranged subcritical reaction vessels, and discharge pipes are connected to the lower surfaces. An intake valve is provided in the intake pipe, an exhaust valve in the exhaust pipe, and a discharge valve in the discharge pipe. Furthermore, the stirring chamber is equipped with a stirring shaft, and a first motor for driving the stirring shaft is provided on the side of the stirring chamber. Furthermore, the lifting member is equipped with an arch-shaped box, and this arch-shaped box is provided on both the left and right sides of the upper storage compartment. Annular positioning grooves are provided on both the left and right sides of the upper storage compartment, and annular positioning plates are connected to the upper and lower surfaces of the compression plate, with these positioning plates housed within the positioning grooves. Extension blocks extending outward are provided at both the left and right ends of the compression plate, and these extension blocks are housed within the arch-shaped box. Fixing blocks are provided at both the upper and lower ends of the left and right sides of the upper storage compartment, and a lifting rod is provided through these fixing blocks. The extension blocks are fixed to the lifting rod, and a first gear rail is provided on the outer surface of the lower half of the lifting rod. A support cylinder is provided at the lower end of the outer surface of the arch-shaped box, and multiple telescopic cylinders are fitted into this support cylinder. A propulsion block is provided at the tip of the telescopic rod equipped with multiple telescopic cylinders, and a moving rod is arranged on its inner surface. A second gear rail is provided on the upper surface of the moving rod, and the first gear meshes with this rail. The first gear is connected via an axle to the second gear, which meshes with the first gear rail. Furthermore, a steam generator is also included, which is connected to a feed bowl and is used to supply high-temperature steam to two parallel-connected subcritical reactors. Furthermore, the support frame comprises a support plate and support legs, with the support legs provided around the lower surface of the support plate. The support legs are positioned between the two subcritical reaction vessels, and limiting plates are provided at both the left and right ends of the upper surface of the support plate. The stirring chamber is located between the left and right limiting plates and is connected to the two parallel-connected subcritical reaction vessels via piping. 【0005】 The advantage of this invention lies in integrating two parallel-connected subcritical reactors and the pretreatment process by providing a pretreatment mechanism and support frame. By using compressed feed components and filters to remove impurities and homogenize organic waste, it solves the problems of conventional technology, such as the dispersion of equipment, the complexity of the pretreatment process, and the tendency for clogging. This results in advantages such as simplified equipment structure, reduced pretreatment steps, improved processing efficiency, and prevention of pipe clogging. [Brief explanation of the drawing] 【0006】 [Figure 1] Figure 1 is a structural diagram of the present invention. [Figure 2] Figure 2 is a main viewpoint diagram of the present invention. [Figure 3] Figure 3 shows the structure of the pretreatment mechanism. [Figure 4] Figure 4 shows the structure of the lifting mechanism. [Figure 5] Figure 5 is a front view of the pretreatment structure. [Figure 6] Figure 6 shows the structure of a feed component for a rolling mill. [Modes for carrying out the invention] 【0007】 The present invention will be further described with reference to the drawings. As shown in Figures 1 to 6, the present invention is an organic waste treatment device using subcritical hydrothermal decomposition, comprising two parallel-connected subcritical reaction vessels 1. A feeder 3 for supplying organic waste into the reaction vessel is provided at the top of each reaction vessel. The two reaction vessels are arranged left and right, with a support frame 4 between them. A pretreatment mechanism 5 is provided at the top of the support frame 4, and this pretreatment mechanism 5 is connected to the feeder 3 via piping 51. The pretreatment mechanism 5 includes a stirring chamber 52. The top surface of the stirring chamber 52 is connected to a filter 54 via a flange 53, and a compression feeding component 6 is connected to the top surface of the filter 54. The compression feeding component 6 comprises a feeding chamber 61, and a feeding pipe 62 is connected to the top surface of the feeding chamber 61. A corrugated pipe 63 is connected to the bottom surface of the feeding pipe 62, and this corrugated pipe 63 is provided inside the feeding chamber 61. A compression plate 64 is connected to the end of the corrugated pipe 63, and the compression plate 64 has an opening (not shown) corresponding to the outlet end of the corrugated pipe 63. A solenoid valve 65 is arranged inside this opening. Furthermore, a lifting component 7 is provided on the outer surface of the pay storage unit 61 to enable vertical movement of the compression plate 64. This subcritical reaction vessel is a special device for performing chemical reactions and material processing under subcritical conditions. It leverages the technical advantages of subcriticality (a state where temperature and pressure are close to the critical point, but slightly lower) and is widely used in fields such as chemical industry, energy, materials, and environmental protection. Its core principle lies in utilizing the unique properties of materials in a subcritical state. Subcritical state: A state in which temperature and pressure conditions approach the critical point but have not yet reached it. In this state, the ionic product and solubility of a fluid (especially water) increase significantly, and the dielectric constant decreases. This accelerates many chemical reactions. A subcritical reactor creates and maintains the required subcritical environment by precisely controlling temperature, pressure, and stirring conditions. Its main technical features are as follows: Achieving homogeneous reactions: Effectively removes phase interfaces in multiphase reactions, improving reaction rates and simplifying subsequent separation. Adjusting the properties of the solvent: By changing the pressure and temperature, the density, polarity, and solubility of the subcritical fluid can be fine-tuned, influencing the reaction pathway and improving selectivity and conversion rate. Placing two subcritical reaction vessels side-by-side in parallel means arranging the two vessels laterally and securing them to both sides of a support frame with welding or bolts to achieve a spatially compact layout. Placing the support frame between the reaction vessels means the support structure is positioned in the lateral gap between the two vessels, for example, supporting the pretreatment mechanism with a steel beam frame. Connecting the pretreatment mechanism to the upper hook with piping means the material transport path is connected with metal or pressure-resistant plastic pipes and secured with flanges or clamps. Connecting the stirring chamber and filter with a flange plate means the filter unit is mounted detachably on top of the stirring chamber, for example, using a combination of annular flanges and sealing rings. Equipping the compression feed component with corrugated tubing means a flexible tubular body is connected to the compression plate, and a stainless steel corrugated tubing is configured to undergo the compressive deformation of the material. The lifting device is used to drive the vertical movement of the extrusion plate, controlling its displacement with a mechanical transmission. For example, lifting is achieved using gear rails or cylinders. Specifically, when organic waste enters the upper tank through the feed pipe, a lifting component pushes down the compression plate, causing the corrugated pipe to contract and push the material into the filter. After impurities are captured, the material is mixed in a stirring tank to form a slurry, which is then sent to the reaction vessel through pipes. Solenoid valves installed at the opening of the compression plate control the material flow and prevent clogging. The pretreatment mechanism is integrated into the support frame, reducing the number of separate devices. The side-by-side arrangement of reaction vessels shortens the material transport distance and reduces energy consumption. 【0008】 Compared to conventional technologies, existing equipment requires a separate pretreatment device and suffers from the problem of the feeding system being prone to clogging. This solution reduces the equipment footprint by integrating the pretreatment mechanism into the support frame. By combining extruded feeding components with filters, impurities such as metals and stones can be effectively removed, preventing pipe clogging. The layout of the reaction vessels positioned on the left and right optimizes space utilization and shortens the material transport path. The technical solutions described above simplify the pretreatment process for organic waste and reduce the complexity of the apparatus in this application. Combining extrusion feeding with filtration improves adaptability to materials containing foreign matter and reduces the frequency of cleaning due to shutdowns. The integrated design of the pretreatment mechanism and reaction vessel increases space utilization and enhances the continuous operation stability of the system. Referring to Figures 1 and 2, in one embodiment of the present invention, intake pipes 11 and exhaust pipes 12 are connected to the upper surfaces of two subcritical reaction vessels 1, and discharge pipes 13 are connected to the lower surfaces of two parallel-connected subcritical reaction vessels 1. An intake valve is provided in the intake pipe 11, an exhaust valve in the exhaust pipe 12, and a discharge valve in the discharge pipe 13. The intake pipe is piping for supplying a gas medium to the inside of the reaction vessel, and can be made of stainless steel tubing that is resistant to high temperatures and pressures. After connecting to an external gas source, the gas flow rate is controlled by the intake valve. The exhaust pipe is a passage for discharging gaseous products from inside the reaction vessel, and can be connected to an exhaust gas treatment system using a flange connection method, with the exhaust pressure adjusted by the exhaust valve. The slaughter pipe is a passage for discharging solid or liquid products located at the bottom of the reaction vessel, and can employ a conical pipe structure with an inclined angle. The slaughter valve controls the discharge rate of the substance. The intake valve, exhaust valve, and slaughter valve are all high-pressure valves with corrosion resistance, and precise flow control can be performed using an electrically controlled valve or a pneumatic ball valve. Specifically, in the organic waste treatment process, high-temperature steam or reaction gas is continuously supplied into the reaction vessel from the intake pipe, and the pressure of the reaction environment is precisely controlled by adjusting the opening of the intake valve. After the reaction is complete, the exhaust valve is opened in stages, and equipment damage due to a sudden pressure drop is avoided by gradually reducing the pressure. The discharge valve at the bottom of the discharge pipe uses an intermittent opening and closing system to discharge the hydrolysis products at a predetermined rate and prevent clogging of the piping. Each valve is controlled in conjunction with an independent control system to ensure that the pressure and temperature parameters inside the reaction vessel are always kept within a predetermined threshold range. 【0009】 Conventional systems typically use a single pipe for transporting multiple phases of materials, lacking independent gas supply, exhaust, and solid-liquid product discharge channels, resulting in insufficient control of reaction conditions. In this solution, separate supply, exhaust, and discharge pipes are provided, along with dedicated valves, physically isolating the supply and exhaust of gaseous media and the discharge of solid products, effectively preventing cross-contamination of substances in different phase states during transport. The above technical solutions enable this application to solve the problem of pipe clogging caused by the mixing of media in complex organic waste treatment processes, thereby reducing the frequency of equipment maintenance. The independently controlled valve system improves the accuracy of pressure regulation within the reaction vessel and avoids the impact of pressure fluctuations on the hydrolysis reaction efficiency. The separated piping design shortens the transport path of materials, improving the efficiency of solid product discharge and reducing the load pressure on the exhaust gas treatment system. As shown in Figures 1 to 3, in one embodiment of the present invention, a stirring shaft (not shown) is provided inside the stirring chamber 52, and a first motor 55 for driving the stirring shaft is provided on the side of the stirring chamber 52. Of these components, the stirring shaft refers to a rotating shaft equipped with stirring blades, specifically made of stainless steel with spirally arranged blades. Its function is to mechanically mix the organic waste introduced into the stirring chamber, preventing material aggregation and stratification. The "first motor" referred to here is the power unit that drives the stirring shaft, and can be specifically implemented using an inverter-type speed-governing motor. By adjusting the rotational speed, it is possible to meet the mixing needs of slurries with different viscosities and ensure the stability of the coordination between the stirring process and subsequent processing steps. Specifically, when organic waste is transported from the compression feed section to the agitated tank, the first motor drives the agitator shaft at a predetermined rotational speed, causing the material to form a vortex within the tank. The agitator blades shear and churn the material, crushing the solid particles and bringing them into sufficient contact with the liquid to form a uniform paste. This paste is then sent directly through pipes to two parallel-connected subcritical reactors. This avoids the system complexity associated with additional equipment such as crushers and homogenization tanks required in conventional pretreatment processes. 【0010】 Compared to conventional technologies, conventional pretreatment systems rely on multi-stage equipment to crush and mix materials, resulting in a large footprint and the risk of fibers becoming entangled in the equipment. This solution integrates the stirring shaft and drive motor into a single container, enabling crushing, mixing, and slurry preparation functions within a single vessel, simplifying the equipment layout and reducing the probability of clogging. Through the technical means described above, this application enables the continuous and highly efficient mixing of organic waste in the pretreatment stage, ensuring that the uniformity of the slurry meets the requirements for the subsequent hydrolysis reaction. The synchronized operation of the stirring shaft and motor effectively prevents long fibrous materials from becoming entangled in the equipment, reducing the frequency of cleaning due to shutdowns and thereby improving the continuous operation capacity of the processing system. As shown in Figures 1 to 6, in one embodiment of the present invention, the lifting component 7 comprises an arc-shaped box body 71. Arc-shaped box bodies 71 are provided on the left and right sides of the upper storage compartment 61, and annular positioning grooves 72 are provided on both sides. Annular positioning plates 73 are connected to the upper and lower surfaces of the compression plate 64, and these positioning plates 73 are housed in the annular positioning grooves 72. Extension blocks 74 extend outward from both the left and right ends of the compression plate 64, and these extension blocks 74 are housed in the arc-shaped box body 71. Fixing blocks 75 are provided at both the upper and lower ends of the left and right sides of the upper storage compartment 61, and the lifting rod 76 passes through the fixing blocks 75. The extension blocks 74 are fixed to the lifting rod 76. A first rail 77 is provided on the outer surface of the lower half of the lifting rod 76. A support cylinder 78 is provided at the lower end of the outer surface of the arc-shaped box body 71, and a plurality of telescopic cylinders 79 are fitted into this support cylinder 78. A propulsion block 8 is provided at the tip of the telescopic rod of each telescopic cylinder 79, and a moving rod 81 is positioned on the inner surface of the propulsion block 8. A second rail 82 is provided on the upper surface of the moving rod 81, and a first gear 83 meshes with this second rail 82 in a gear-like manner. The first gear 83 is connected via a shaft 84 to a second gear 85 which meshes with the first rail 82 in a gear-like manner. The arc-shaped box body is a semi-enclosed outer shell structure that covers the sides of the payload. Specifically, it is press-formed from stainless steel to house the extension block and restrict its movement trajectory, thereby preventing displacement during the lifting and lowering process of the rolled plate. The annular limiting groove and annular limiting plate form a sliding joint, and the combination of the annular recess and flange ensures that the rolled plate moves stably only in the vertical direction. The extension block is a block-like structure that extends outward from both sides of the rolled plate and is fixed to the lifting rod by welding or bolting, transmitting the linear motion of the lifting rod to the rolled plate. The gear transmission mechanism of the first and second gears employs the form of oblique or linear gears and converts the horizontal motion of the moving rod into the vertical motion of the lifting rod. The multi-stage telescopic cylinder is a pneumatically driven executor equipped with multiple stages of piston rods. Specifically, it uses a two-stage cylinder to achieve horizontal reciprocating motion of the extrusion block by adjusting the air pressure. Specifically, when multiple telescopic cylinders are activated, the telescopic rods push the extrusion block horizontally, simultaneously driving the moving rods. A second gear rail attached to the moving rod rotates the first gear, which in turn drives the second gear via an axle. The second gear meshes with the first gear rail on the lifting rod, causing vertical displacement in the lifting rod. The extension block moves synchronously with the lifting rod, moving the compression plate up and down within the corrugated tube. An annular limiting plate slides within an annular limiting groove, restricting the trajectory of the compression plate. When the compression plate is pushed down, the corrugated tube contracts, pushing the material through the opening into the filter. When the compression plate rises, the corrugated tube stretches, creating negative pressure to draw in the material, and a solenoid valve controls the opening and closing of the opening, enabling continuous supply. 【0011】 Conventional feeding devices often employ single-axis spiral conveyors or hydraulic extrusion structures, which have problems such as mechanical parts getting caught in fibers or hard impurities clogging the system and causing unstable movement. In this solution, an arched box encloses the extension block to form a guide channel, and a double constraint of an annular positioning groove and positioning plate allows the compression plate to move up and down stably even in material environments containing impurities. By using a gear rail drive mechanism, the risk of slippage can be avoided by replacing conventional chain or belt drives, and furthermore, the linear drive method of the multi-stage telescopic cylinder is more suitable for high-pressure sealing environments than rotary motors. Through the technical means described above, the present invention effectively solves the problem of rolled plates stopping during the transport process of organic waste containing impurities. The elastic stretch properties of the ribbon tube allow it to accommodate fibers and hard particles mixed in the material, and the gear mechanism can maintain stable power output even under high-pressure conditions. The annular position limiting structure ensures that the rolled plates move accurately in the vertical direction, thereby improving the continuity of material transport and reducing the frequency of equipment maintenance. It also includes a steam generator connected to the payload bowl, which is used to supply high-temperature steam to two parallel-connected subcritical reactors. A steam generator is a device that generates high-temperature and high-pressure steam and is composed of an electric heating or gas heating method. The temperature range of the generated steam is 200 - 400 °C, and the pressure range is 1.5 - 3.0 MPa. The steam generator is connected to a feed hopper via a pipe and is used for preheating and auxiliary transportation before feeding materials into the reaction kettle. The "connection to the feed hopper" mentioned here means that the output end of the steam generator communicates with the steam inlet of the feed hopper by flange connection or welding. Specifically, by using a corrugated pipe made of high-temperature-resistant metal or a high-pressure sealing pad for connection, leakage during the steam transportation process can be prevented. Specifically, the high-temperature steam output from the steam generator is injected into the feed hopper through a pipe and mixed with the organic waste to be treated. Due to the heat of the steam, the material before entering the reaction kettle can be preheated, for example, the temperature can be raised to 80 - 120 °C. Also, the steam pressure acts as an auxiliary when transporting high-viscosity paste through the pipeline. During the operation of two subcritical reaction kettles, the steam generator continuously supplies high-temperature steam. At the initial stage of the reaction, steam is used to quickly raise the temperature in the kettle to the set value, and the amount of steam lost due to pressure fluctuations during the reaction is replenished. 【0012】 Conventional devices rely on an external heat source to heat the reaction kettle, so there are problems such as slow heating speed and high energy consumption. In this solution, by directly integrating the steam generator into the feeding system, the transfer of thermal energy is started from the material transportation stage, shortening the time until the reaction kettle reaches the working temperature. Also, by injecting steam, the viscosity of high-solid-content substances can be reduced. For example, by improving the fluidity of livestock and poultry manure slurry with a solid content of 20 - 30% by 30 - 50%, the risk of pipeline blockage can be reduced. According to the above technical solution, the present application realizes the multi-stage utilization of thermal energy in organic waste treatment. Steam promotes the heating of the reaction kettle as a heat transfer medium, improves the mass transfer characteristics as a medium, and avoids the complexity of the device and the waste of energy caused by an independent heating system. For example, in the scenario of chicken manure treatment, the startup time of the reaction kettle is shortened from 40 - 60 minutes in the prior art to 20 - 30 minutes by preheating with steam, and the feeding efficiency is improved by about 25% by steam-assisted transportation. Referring to FIGS. 1 and 2, in an embodiment of the present invention, the support frame 4 includes a support plate 41 and support legs 42. Support legs 42 are provided around the lower surface of the support plate 41, and they are arranged between two subcritical reaction kettles 1. Position limiting plates 43 are provided at both left and right ends of the upper surface of the support plate 41, and the stirring chamber 52 is provided between these position limiting plates 43. The stirring chamber 52 is connected to two subcritical reaction kettles 1 connected in parallel via a pipe 51. The support plate mentioned here is the basic structure that supports the pretreatment mechanism. Specifically, a rectangular steel plate can be used. Its thickness is, for example, 20 - 50 mm, and by fixing with support legs between the reaction kettles, space can be saved. The support leg is a component that provides support in the vertical direction. Specifically, four cylindrical steel columns welded to the four corners of the support plate are used. The diameter is, for example, 100 - 200 mm, and it is used to disperse the load and enhance the structural stability. The limit plate is a component that limits in the horizontal direction. Specifically, a structure is adopted in which two L-shaped steel plates are symmetrically welded to both sides of the support plate. The height is, for example, 300 - 500 mm, and it prevents displacement due to vibration by limiting the horizontal displacement of the stirring chamber. The pipe connecting the mixing tank and the reaction kettle is a mass transport path, and it can be realized using a high-pressure-resistant stainless steel pipe. The inner diameter is, for example, 50 - 100 mm, and continuous transportation of the slurry is ensured by sealed connection with flanges. Specifically, a support plate is fixed by four support legs in the gap between two parallel-arranged subcritical reaction vessels, and the pretreatment mechanism is located directly above both reaction vessels. The stirring chamber is sandwiched between positioning plates located in the central region of the support plate, and its bottom outlet is connected to the supply ports of each reaction vessel via branched piping. When the pretreated slurry enters the stirring chamber, the positioning plates prevent the chamber from shifting due to vibration, and the support legs transmit the load to the floor, thereby preventing deformation of the support plate. The slurry is divided and distributed to both reaction vessels through piping, enabling material distribution and continuous processing. 【0013】 Compared to conventional technology, conventional equipment typically uses separate support frames for the pretreatment mechanism and reaction vessel, resulting in a less-than-ideal layout and more complex piping connections. This solution integrates the pretreatment mechanism and reaction vessel into a compact, unified structure by embedding the support legs in the empty space between the two reaction vessels, thereby reducing the required site area. Furthermore, by directly fixing the position of the stirring chamber with a position limiting plate, it eliminates the drawback of the conventional bolt-fixing method, which required frequent adjustments, and reduces the risk of piping leaks due to equipment displacement. The above technical solutions effectively address the problem of reduced site utilization due to the loose arrangement of the pretreatment mechanism and reaction vessel. The operational stability of the apparatus is ensured through the cooperation of support legs and position limiting plates, and material transport resistance is reduced because the piping is directly connected over short distances. The overall structure is adapted to the requirements of industrialized continuous production. This technology solves the problems of pretreatment systems in the prior art, such as complexity, clogging, and discontinuity in processing, thereby simplifying and stably operating the organic waste treatment process. By combining compressed feed and multi-stage filters, smooth transport of materials containing impurities is ensured, avoiding maintenance that requires machine downtime. The action of supercritical and subcritical water enhances the decomposition efficiency of organic matter. Hydrolysis products are converted into directly usable organic fertilizer by centrifugal separation, enabling resource recovery. 【0014】 The above describes only relatively excellent embodiments of the present invention, and any equivalent modifications and modifications made in accordance with the scope of the patent application of the present invention shall all be included within the scope of the present invention. In this paper, “includes,” “contains,” or any other expression means non-exclusive inclusion, and a process, method, article, or apparatus that includes a set of elements includes not only other elements not expressly listed, but also elements inherent in such process, method, article, or apparatus. While embodiments of the present invention are shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The present invention and its embodiments have been described above, but this description is not intended to impose limitations. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art can creatively design a structure or embodiment similar to the technical configuration of the present invention without deviating from the spirit of the invention, then such a design is covered by the present invention.

Claims

[Claim 1] A device for subcritical hydrothermal decomposition treatment of organic waste, Two subcritical reactors arranged in parallel, A supply hopper connected to the upper surface of each of the two subcritical reaction vessels for supplying organic waste into the subcritical reaction vessel, Equipped with, The two subcritical reaction vessels are arranged on the left and right sides. A support frame is provided between the two subcritical reaction vessels. A pre-processing mechanism is installed on the upper surface of the support frame. The aforementioned pre-treatment mechanism is connected to the supply hopper via piping, The aforementioned pre-treatment mechanism is: A stirring tank and A filter connected to the upper surface of the stirring tank via a flange, A push-in supply member connected to the upper surface of the filter, Includes, The aforementioned push-in supply member is Supply tank and A supply pipe connected to the upper surface of the supply tank, A bellows pipe connected to the lower surface of the supply pipe and positioned within the supply tank, A pressing plate connected to the end of the bellows tube, Equipped with, The pressing plate is provided with an opening corresponding to the discharge end of the bellows tube. A solenoid valve is installed in the aforementioned opening. A lifting member for raising and lowering the pressing plate is provided on the outer surface of the supply tank. A subcritical hydrothermal decomposition treatment apparatus for organic waste, characterized by the following features. [Claim 2] An air intake pipe and an exhaust pipe are connected to the upper surface of the subcritical reaction vessel, and a slag exhaust pipe is connected to the lower surface. An air intake valve is provided in the air intake pipe, an exhaust valve in the exhaust pipe, and a slag exhaust valve in the slag exhaust pipe. A subcritical hydrothermal decomposition apparatus for organic waste according to claim 1, characterized in that [Claim 3] A stirring shaft is installed inside the aforementioned stirring tank. A first motor for driving the stirring shaft is provided on the side surface of the stirring tank. A subcritical hydrothermal decomposition apparatus for organic waste according to claim 1, characterized in that [Claim 4] The aforementioned lifting member is Arch-shaped housing, The arch-shaped housings provided on the left and right sides of the supply tank, Annular limit grooves are drilled on the left and right sides of the supply tank, An annular limit plate attached to the upper and lower surfaces of the aforementioned press plate and positioned within the annular limit groove, Extension blocks extending outward from both left and right ends of the aforementioned pressing plate and positioned within the arch-shaped housing, Fixed blocks are installed at the upper and lower ends of the left and right sides of the supply tank, A lifting rod is provided that penetrates the aforementioned fixed block, The extension block is fixed and fitted onto the lifting rod, The first rack teeth provided on the outer surface of the lower half of the lifting rod, A support cylinder is installed at the lower end of the outer surface of the arch-shaped housing, A multi-stage telescopic cylinder incorporated into the aforementioned support cylinder, An extrusion block provided at the tip of the telescopic rod of the multi-stage telescopic cylinder, A movable rod attached to the inner surface of the extrusion block, A second rack tooth is provided on the upper surface of the aforementioned moving rod, The first gear meshes with the second rack teeth, The first gear is connected via a shaft to a second gear that meshes with the first rack teeth, Equipped with, A subcritical hydrothermal decomposition apparatus for organic waste according to claim 1, characterized in that [Claim 5] Furthermore, it is equipped with a steam generator, The steam generator is connected to the supply hopper and supplies high-temperature steam to the two subcritical reactors. A subcritical hydrothermal decomposition apparatus for organic waste according to claim 1, characterized in that [Claim 6] The aforementioned support frame is Support plate and Equipped with support legs, The support legs are installed at each of the four corners of the lower surface of the support plate. The support legs are located between the two subcritical reaction vessels. Limit plates are provided at both the left and right ends of the upper surface of the support plate. The stirring tank is positioned between the left and right limit plates. The stirring tank is connected to the two subcritical reaction vessels via piping. A subcritical hydrothermal decomposition apparatus for organic waste according to claim 1, characterized in that

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