A biohydrolysis reactor for organic waste

Abstract

The present invention relates to an organic waste biohydrolysis reactor, wherein a tank body is provided with a middle partition on a bottom plate to divide the tank body into a first channel and a second channel which are connected at the rear, and a discharge port of a screw conveyor is connected to the first channel; a mechanical stirring mechanism comprises at least two groups of stirring units which are independently and parallelly arranged, and a stirring main shaft of the stirring unit is installed on the side wall plates on both sides of the tank wall and one end extends out of the side wall plates and is connected to a motor through a reducer; a gas stirring mechanism comprises a main gas pipe and multiple groups of aeration units, and the aeration units are placed in each aeration tank of the bottom plate; a gas discharge mechanism has a discharge tank and a discharge pipe with a conical bottom, and the air holes on the discharge tank are respectively connected to a vacuum pump and an air compressor through pipelines, and the two ends of the discharge pipe are respectively connected to the front end of the second channel of the tank body and the feed port of the discharge tank. The present invention can reduce energy consumption and wear, improve material stirring strength, effectively increase the effective volume of the reactor, have a large processing capacity, and have a high impurity fault tolerance rate.

Description

Technical Field

[0001] The invention relates to an organic garbage biohydrolysis reactor, belonging to the technical field of garbage treatment. Background Art

[0002] A large amount of kitchen waste separated from domestic waste accounts for about 30% of the total domestic waste, that is, hundreds of thousands of tons per day in the country, and it is urgently needed to be recycled through new terminal treatment facilities. Kitchen waste mainly comes from households and vegetable markets. Compared with restaurant kitchen waste, there are the following significant differences: 1) Kitchen waste is mostly "raw", that is, uncooked garbage, while restaurant kitchen waste is mostly cooked garbage, so the hydrolysis of kitchen waste requires a longer residence time. 2) Kitchen waste contains a lot of impurities, such as bones, shells, sand, plastic, glass and metal, and it is difficult to effectively and thoroughly remove them before entering the hydrolysis unit, and the amount of impurities; while restaurant kitchen waste has fewer impurities, and the existing restaurant kitchen waste treatment process can achieve most of the impurity removal. 3) The output of kitchen waste is much greater than that of restaurant kitchen waste, so the single-line processing capacity of the terminal treatment facility is required to be larger. 4) The oil content of kitchen waste is lower than that of restaurant kitchen waste, so the benefits of resource utilization are lower. It is necessary to reduce the investment per unit processing volume and optimize the operating energy consumption to maintain the healthy and stable operation of the project.

[0003] The method for treating kitchen waste usually adopts pretreatment + anaerobic digestion process (EMBT). After the kitchen waste is screened, the organic matter under the screen is screened and filtered through interference monitoring and magnetic separation to remove large objects and metals, and then enters the organic waste biohydrolysis reactor. Under the combined action of mechanical, biological and hydraulic forces, the biodegradable organic matter is hydrolyzed into the liquid phase, and after solid-liquid separation, the organic slurry enters the anaerobic system.

[0004] A food waste hydrolysis reactor adopts a vertical structure, and a three-dimensional agitator is provided in the hydrolysis tank, and the agitator is driven by a motor to stir the garbage and stir and hydrolyze the material. For example, the "crushing and hydrolysis device for food waste treatment" disclosed in CN216540135U, the top of the hydrolysis tank is provided with a feed port, the bottom is provided with a discharge port, the top of the hydrolysis tank is fixedly installed with a motor and an external transmission mechanism, the middle and upper part of the hydrolysis tank is provided with a stirring mechanism, and the lower part is provided with a movable rod. When the driving shaft drives the stirring mechanism to stir and crush the garbage, the movable rod rotates synchronously with the driving shaft to drive the stirring mechanism to stir the garbage at the bottom of the hydrolysis tank, so as to solve the problem that it is not easy to fully stir the garbage during the hydrolysis process, especially the garbage accumulated at the bottom of the hydrolysis tank, which is not easy to be stirred, and affects the hydrolysis effect of the garbage. The hydrolysis device of this structure needs to add an external transmission mechanism. On the one hand, a high-power motor is required, and the energy consumption is high. On the other hand, due to the use of a complex transmission mechanism, the maintenance difficulty is increased. The material deposited at the bottom of the tank body is easy to cause the stirring mechanism to be unstable, and it is difficult to adapt to the treatment of high-content kitchen waste. Furthermore, kitchen waste contains a large amount of glass, shells, and sand and gravel materials. After heating, the solubility of the liquid phase increases, the fluidity becomes better, and the materials tend to settle at the bottom of the tank, making it difficult to discharge. Therefore, the vertical hydrolysis reactor is small in size and has a small single-line processing capacity, which cannot meet the kitchen waste processing volume.

[0005] Another structure of the kitchen waste hydrolysis reactor is a horizontal structure, the agitator is a horizontal structure and has a plurality of stirring blades, the hydrolysis tank is provided with a feed end at one end and a discharge end at the other end, and the materials in the hydrolysis tank are stirred and hydrolyzed by the stirring blades. As disclosed in CN 212216559 U, a horizontal high-temperature wet-heat hydrolysis device for kitchen waste is provided in the hydrolysis tank, one end of the rotating intermediate shaft passes through one of the end side walls of the device hydrolysis tank and the motor, the other end of the rotating intermediate shaft passes through the other end side wall of the device hydrolysis tank, and a plurality of connecting shafts are provided on the surface of the rotating intermediate shaft, the connecting shaft is arranged perpendicular to the axis of the rotating intermediate shaft, one end of the connecting shaft is fixedly connected to the surface of the rotating intermediate shaft, and a paddle blade is provided at the other end of the connecting shaft, and a quick-release connection assembly is provided between the paddle blade and the connecting shaft to solve the technical problem that the paddle blade of the stirring device is easy to wear and deform and has a short service life. However, the hydrolysis reactor of this structure also has the problems of large motor power and high energy consumption, and also has a small single-line processing capacity, which does not meet the existing kitchen waste processing capacity.

[0006] The existing horizontal and vertical hydrolysis devices have stirring mechanisms that fully mix the materials. Due to the large stirring resistance, high energy consumption is required, and the blade wear rate is high, requiring a large amount of maintenance work. In particular, there are certain stirring blind spots between the stirring blades, resulting in uneven hydrolysis reactions and reducing the effective volume of the reactor. Therefore, it is difficult to adapt to organic waste with a high impurity content. Summary of the invention

[0007] The purpose of the present invention is to provide an organic waste biohydrolysis reactor which can reduce energy consumption and wear, improve material stirring intensity, effectively increase the effective volume of the reactor, have a large processing capacity and a high impurity tolerance rate.

[0008] The technical solution of the present invention to achieve the above object is: an organic waste biohydrolysis reactor, characterized by comprising a tank body, a feeding mechanism, a mechanical stirring mechanism, a gas stirring mechanism and a gas discharging mechanism;

[0009] The pool body is used to hold materials, and includes a bottom plate, a top plate and surrounding pool walls to form a sealed and heat-insulating pool body. The bottom plate is provided with a middle partition to divide the pool body into a first channel and a second channel that are connected at the rear and allow materials to flow in the pool body. The bottom plate is provided with a plurality of concave aeration grooves for placing explosion units in the first channel and the second channel. The exhaust port provided on the top plate is connected to the air compressor for reuse through a return air pipe. A heater is provided on the pool wall, and a feeding mechanism and a gas discharge mechanism are provided on the front side of the pool wall respectively. A feeding pipe with a feeding valve is also provided on the pool wall at the lower part of the feeding mechanism, and the feeding pipe is connected to the main pipe.

[0010] The feeding mechanism is used to add materials into the pool body, and includes a screw conveyor, which is installed in the middle and upper part of the front wall plate of the pool wall, and the discharge port of the screw conveyor is connected to the first channel;

[0011] The mechanical stirring mechanism is used to perform plug-flow stirring on the materials in the pool body, and includes at least two groups of stirring units independently and arranged in parallel, wherein the stirring unit includes a motor, a stirring main shaft and stirring blades, wherein the stirring main shaft is installed on the side wall plates on both sides of the pool wall through bearings, and the stirring main shaft passes through the middle partition plate, one end of the stirring main shaft extends out of the side wall plate and is connected to the motor through a reducer, and the stirring main shaft has a plurality of stirring blades and is correspondingly arranged in the first channel and the second channel;

[0012] The gas stirring mechanism is used to aerate and stir the materials in the tank body, and includes a main air pipe and multiple aeration units. The main air pipe is connected to an air compressor. The aeration units are placed in each aeration tank of the bottom plate, and two aeration units are correspondingly arranged on both sides of the lower part of each stirring main shaft and located in the stirring blind area of ​​the corresponding stirring blade. The aeration unit includes an aeration main pipe and aeration pipes fixed and arranged on both sides of the aeration main pipe. The aeration main pipe is connected to the main air pipe through a branch pipe.

[0013] The gas discharge mechanism is used to discharge the material in the pool body, and includes a discharge tank with a conical bottom and a discharge pipe. The discharge tank is arranged outside the pool body, and the air holes on the discharge tank are respectively connected to the vacuum pump and the air compressor through pipelines. The pipeline is provided with a switching valve for switching between the vacuum pump and the air compressor. The pool wall is provided with at least two discharge pipes with discharge valves at the bottom of the front wall panel. One end of the discharge pipe is connected to the front end of the second channel of the pool body, and the other end is connected to the feed port of the discharge tank. The vacuum pump is used to suck the material in the pool body into the discharge tank. The discharge port at the bottom of the discharge tank is connected to the main pipe, and the air compressor is used to provide compressed gas to press the material in the discharge tank into the main pipe.

[0014] The organic waste biohydrolysis reactor of the present invention adopts a sealed tank body, and a heater is provided on the tank body, so that the organic waste can be set at the optimal temperature to bio-hydrolyze the solid phase in the organic matter, improve the hydrolysis efficiency of the organic components in the organic waste, and reduce the content of the residual organic components, which is beneficial to the later biogasification process and production efficiency. The mechanical stirring mechanism of the present invention adopts a plurality of independent and parallel stirring units, and the stirring blades of each stirring unit perform plug-flow stirring on the materials in their respective stirring areas, and push the materials forward in parallel, and the materials are continuously hydrolyzed, the solid phase organic matter on the materials is hydrolyzed and flows into the liquid phase, and the materials flow smoothly to the discharge side, solving the technical problems of full mixed flow stirring of organic waste with high impurities, high wear of components such as stirring blades, and high stirring energy consumption, especially high fault tolerance for impurities, and adapting to different organic waste hydrolysis treatments. The present invention adopts multiple independent stirring units, which can not only stir the materials at the same time, but also stir the materials separately, and the plug-flow stirring control is convenient, which can greatly reduce the motor power, and reduce the operating energy consumption, and adapt to the treatment of organic waste with high impurities such as kitchen waste. The present invention also has a plurality of aeration units at the bottom of the tank body, and each aeration unit is correspondingly arranged at the stirring blind area on both sides of the lower part of each stirring blade, so that the compressed gas can be used to assist the gas stirring of the material through the nozzle of the aeration pipe, which can reduce the stirring blind area. Therefore, under the joint action of mechanical stirring and gas stirring, the stirring capacity is enhanced, so that the material is fully in contact with the bacteria and extracellular enzymes in the reactor, and the biodegradable organic matter is converted into a liquid phase, which effectively increases the effective volume of the reactor, improves the hydrolysis efficiency, and has a large monomer processing capacity, which can reach 600 tons / day, and the processing capacity is more than three times that of the existing reactor. The present invention adopts both the stirring unit and the aeration unit as modular units, and the monomer processing energy can be conveniently adjusted by adding and subtracting modules. The present invention provides a middle partition in the tank body to form a first channel and a second channel for material flow. When the material continuously enters the tank body, the material is subjected to plug flow under the joint action of mechanical stirring and gas stirring. Since the material level on the feed side is higher than that on the discharge side, during the acidification and hydrolysis of the material, the solid phase organic matter is continuously biodegraded and converted into a liquid phase, and smoothly moves from the feed side to the discharge side along the U-shaped flow channel in the tank body, ensuring that the material is slowly and smoothly transported from the feed side to the discharge side, and can be continuously processed. The material residence time is only 2-5 days, and the hydrolysis efficiency is high. The present invention can reuse the odor generated in the reactor without adding a dedicated odor treatment device, which can reduce the processing cost. The present invention adopts a gas discharge mechanism, and a vacuum pump provides the suction power for the discharge tank feed. After the discharge tank is filled with material, the material is pressed out from the discharge port with compressed gas, which can realize large-caliber vacuum discharge, and is suitable for the discharge of various types of organic waste after biological hydrolysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a three-dimensional structural diagram of the organic waste biological hydrolysis reactor of the present invention.

[0017] Figure 2 It is a structural schematic diagram of the organic waste biological hydrolysis reactor of the present invention.

[0018] Figure 3 It is a cross-sectional view of the organic waste biological hydrolysis reactor of the present invention.

[0019] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of AA.

[0020] Figure 5 It is a partial structural schematic diagram of the gas stirring mechanism of the present invention.

[0021] Figure 6 yes Figure 3 Schematic diagram of the enlarged structure at location I.

[0022] Figure 7 It is a schematic diagram of the structure of the organic waste biological hydrolysis reactor of the present invention after the pool wall and the top plate are removed.

[0023] Among them: 1-gas discharge mechanism, 1-1-discharge tank, 1-11-air hole, 1-12-discharge port, 1-13-feed port, 1-2-discharge pipe, 2-feeding pipe, 3-main pipe, 4-feed mechanism, 4-1-feed support, 4-2-screw conveyor, 5-tank body, 5-1-tank wall, 5-2-observation window, 5-3-top plate, 5-31-exhaust port, 5-4-inspection door, 5-5-bottom plate, 5-51-aeration tank, 6-gas stirring mechanism, 6-1-main gas pipe, 6-2-aeration unit, 6-3-branch pipe, 7-middle partition, 8-mechanical stirring mechanism, 8-1-stirring main shaft, 8-2-stirring blade, 8-21-support rod, 8-22-I-shaped channel steel, 8- 3—motor, 8-4—reducer, 8-5—torque bearing plate, 8-6—support torque arm, 8-7—seal seat, 8-8—packing seal assembly, 8-9—bearing seat, 8-10—bearing seat, 8-11—compensation ring, 8-12—upper sleeve, 8-13—upper pin, 8-14—lower sleeve, 8-15—lower pin, 9—overpressure protection valve, 10—temperature sensor, 11—heater. DETAILED DESCRIPTION

[0024] See Figures 1 to 3 As shown, the organic waste biohydrolysis reactor of the present invention comprises a tank body 5, a feeding mechanism 4, a mechanical stirring mechanism 8, a gas stirring mechanism 6 and a gas discharging mechanism 1.

[0025] See Figures 1 to 3As shown, the tank body 5 of the present invention is used to hold materials, and includes a bottom plate 5-5, a top plate 5-3 and surrounding tank walls 5-1 to form a sealed and heat-insulating tank body 5. Figures 1 to 3 A middle partition plate 7 is provided on the bottom plate 5-5 of the present invention, which is used to divide the tank body 5 into a first channel a and a second channel b which are connected at the rear and allow materials to flow in the tank body 5. Under the combined action of mechanical stirring and gas stirring, the material added to the tank body 5 is pushed horizontally to make the material flow toward the discharge direction in the biological hydrolysis reaction. The material flows from the rear of the first channel a and then enters the second channel b, and is finally discharged from the discharge side. Since the material can form a U-route flow in the tank body 5, the single-line processing capacity can be greatly improved compared with the tank body 5 of the same volume.

[0026] See Figures 1 to 3 As shown, the tank body 5 of the present invention is rectangular, and the inner corners of the two side wall panels and the rear wall panel of the tank wall 5-1 have guide arc surfaces, which can reduce the material and flow resistance during the process of pushing the material in the tank, and push the material in the first channel a into the second channel b during the process of fully mixing the material with the bacteria and enzymes and continuously hydrolyzing the material. The rectangular tank body 5 is convenient for the installation and on-site arrangement of the mechanical stirring mechanism 8 and the gas stirring mechanism 6. Figure 1 As shown, an inspection door 5-4 is provided on one of the side wall panels of the pool wall 5-1 of the present invention, which facilitates maintenance operations of the stirring mechanism and the aeration unit in the pool body 5. An overpressure protection valve 9 is also installed on the pool wall 5-1 of the present invention. When the pressure in the pool body 5 exceeds the set pressure, the overpressure protection valve 9 is used to release the pressure in time, thereby improving the working reliability of the reactor.

[0027] See Figures 1 to 3 As shown, the bottom plate 5-5 of the present invention is provided with a plurality of concave aeration grooves 5-51 for placing aeration units at intervals in the first channel a and the second channel b. The compressed gas is introduced into the channel of the tank body 5 through the aeration unit, and the materials in the area that cannot be reached by mechanical stirring are subjected to gas stirring, so that the biohydrolysis bacteria and the extracellular biohydrolytic enzymes are fully in contact with the organic waste, the blind area between the mechanical stirring parts is greatly reduced, the overall stirring intensity of the reaction is increased, the biohydrolysis efficiency of the organic components in the organic waste is improved, and in particular, the effective volume of the reactor can be guaranteed, thereby improving the processing capacity.

[0028] See Figures 1 to 3As shown, the exhaust port 5-31 provided on the top plate 5-3 of the present invention is connected to the air compressor for reuse through the return air pipe. The return air pipe can be connected to the air inlet of the compressor for reuse, and the odor in the pool body 5 is discharged to maintain the pool body 5 does not exceed the set pressure. The return air pipe is provided with an air valve to regularly pass the gas in the pool body 5 into the compressor. The return air pipe can also be connected to the return air tank. After the gas is recovered, the return air tank provides the odor to the compressor, and the compressed gas is directly or the compressed gas in the gas tank is provided to the aeration unit 6-2 and the discharge tank, and the compressed gas is used to stir and discharge the material.

[0029] See Figures 1 to 3 As shown, a heater 11 is provided on the pool wall 5-1 of the present invention, so that the organic waste can be bio-hydrolyzed in the solid phase of the material within the optimal range of 30-55°C, thereby improving the bio-hydrolysis efficiency of the organic components in the organic waste. The pool wall 5-1 of the present invention is hollow, and the heater 11 includes multiple groups of heating coils with the same heating area. Each heating coil is installed in the cavity of the pool wall 5-1, with uniform heating, low energy consumption, and convenient adjustment of local temperature. In addition, an insulation layer is provided on the outer side of the pool wall 5-1 and the top plate 5-3 to reduce heat loss. The pool wall 5-1 of the present invention is provided with a plurality of temperature sensors on the inner side of the side wall panels and the rear wall panel. The inner side of the side wall panels is provided with at least two temperature sensors 10 respectively arranged on the inlet and outlet sides, and a temperature sensor 10 is provided in the middle of the rear wall panel, so that the material temperature of each section can be detected. When 2 / 3 of the temperature sensors 10 detect that the material temperature is lower than the set temperature, the heater 11 is controlled to start heating to avoid frequent start and stop of the heating system.

[0030] See Figures 1 to 3 As shown, the pool wall 5-1 of the present invention is respectively provided with a feeding mechanism 4 and a gas discharge mechanism 1 on the front side, and the pool wall 5-1 is also provided with a feeding pipe 2 with a feeding valve at the lower part of the feeding mechanism 4, and the feeding pipe 2 is connected to the main pipe 3. By controlling the feeding valve, an external pump uses the feeding pipe 2 to pump sludge and biogas slurry in a suitable proportion as hydrolyzed bacteria into the pool body 5 through the main pipe, and provides the required extracellular hydrolase at the same time. When it is necessary to adjust the bacteria concentration and the water content of the material in the reactor, the hydrolyzed material can also be returned to the pool body 5 through the feeding pipe 2.

[0031] See Figure 1 , 2 As shown, the feeding mechanism 4 of the present invention is used to add materials into the pool body 5, including a screw conveyor 4-2, the screw conveyor 4-2 is installed in the middle and upper part of the front wall panel of the pool wall 5-1, the discharge port of the screw conveyor 4-2 is connected to the first channel a, the feeding equipment is stable and reliable, easy to maintain, the feed particle size of the screw conveyor can be between 50mm-150mm, which can be suitable for various types of organic waste. Figure 1 , 2As shown, the present invention provides a feed bracket 4-1 on the upper middle part of the front wall panel of the pool wall 5-1, and the screw conveyor 4-2 is obliquely installed on the feed bracket 4-1. The front wall panel is located on the feed side and provided with an observation window 5-2 for convenient observation of the material added to the pool body 5.

[0032] See Figure 1 As shown, the mechanical stirring mechanism 8 of the present invention is used to perform plug flow stirring on the material in the tank body 5, and includes at least two sets of independent and parallel stirring units. A plurality of parallel stirring units can be set according to the length of the tank body 5. The material can be pushed horizontally toward the discharge direction during the stirring process. In addition, during the hydrolysis reaction, due to the increase in the amount of liquid material, the material can be seen. Figure 1 , 2 As shown, the present invention can use four independent stirring units with stirring main shafts arranged in parallel. Figures 1 to 3 As shown, the stirring unit of the present invention includes a motor 8-3, a stirring main shaft 8-1 and a stirring blade 8-2, and the stirring speed is 0.5-5rpm. Each stirring unit can be controlled separately, and each stirring main shaft 8-1 can be controlled to run or stop independently. The stirring main shaft 8-1 is installed on the side wall panels on both sides of the pool wall 5-1 through bearings, and the stirring main shaft 8-1 passes through the middle partition 7. The stirring main shaft 8-1 can be installed on the shaft sleeve and supported on the middle partition 7. One end of the stirring main shaft 8-1 extends out of the side wall panel and is connected to the motor 8-3 through the reducer 8-4. The stirring main shaft 8-1 has multiple stirring blades 8-2 and is correspondingly arranged in the first channel a and the second channel b. The stirring blades 8-2 on the same stirring unit can stir the materials in the first channel a and the materials in the second channel b at the same time. See Figure 5 , 7 As shown, the stirring shaft 8-1 of the present invention includes a rectangular shaft section and circular shaft sections at both ends. The rectangular shaft section is convenient for fixing the stirring blades. The circular shaft section of the stirring shaft 8-1 is installed on the bearing seat 8-9 through a bearing. The bearing seat 8-9 is detachably installed on the sealing seat 8-7. The sealing seat 8-7 is installed in the side wall panel, and the packing sealing assembly 8-8 is installed on the sealing seat 8-7 and seals the circular shaft section. The packing sealing assembly 8-8 is an existing sealing assembly. The stirring shaft 8-1 is sealed by the sealing assembly to reduce the overflow of materials and odors.

[0033] See Figure 1 , 3 As shown in FIG. 5 , the stirring blades 8-2 of the present invention are spaced apart along the axial direction of the stirring main shaft and are evenly distributed in the circumferential direction. Figure 1 , 3As shown, two adjacent stirring blades 8-2 of the present invention are arranged at intervals along the axial direction and are evenly distributed at 180° along the circumferential direction, and can also be arranged at intervals along the axial direction and are evenly distributed at 120° along the circumferential direction. The stirring blade 8-2 includes two support rods 8-21 and I-shaped channel steels 8-22 fixed at one end of the two support rods 8-21. A pad is fixed at the other end of each support rod 8-21. The pad is installed on the rectangular shaft section through fasteners. The material is stirred through the I-shaped channel steel 8-22, which can adapt to the stirring of materials with high impurities. Since the stirring blades 8-2 are connected with fasteners, the maintenance and replacement of the stirring blades 8-2 are convenient.

[0034] See Figures 1 to 3 As shown, the reducer 8-4 of the present invention is installed on the torque support plate 8-5, and the two sides of the torque support plate 8-5 are hinged to the upper ends of the support torque arms 8-6 through the upper pin shafts 8-13 respectively, and the lower parts of the two support torque arms 8-6 are hinged to the corresponding bearing seats 8-10 through the lower pin shafts 8-15. The impact load is buffered by the support torque arms 8-6 to absorb the positive and negative direction stresses when the stirring main shaft 8-1 is twisted, thereby improving the working reliability.

[0035] See Figure 5 As shown, the torque support plate 8-5 of the present invention is provided with mounting holes on both sides, and an upper bushing 8-12 is provided in the mounting hole, an upper pin hole is provided on the upper part of the supporting torque arm 8-6, and a lower pin hole is provided on the lower part, an upper pin shaft 8-13 is installed in the upper bushing 8-12 and the upper pin hole of the supporting torque arm 8-6 and is installed on the supporting torque arm 8-6 through a retaining ring, and a compensation ring 8-11 is respectively arranged on both sides of the bushing and is sleeved on the upper pin shaft 8-13; the bearing seat 8-10 is provided with a lower pin hole, and a lower bushing 8-14 is provided in the lower pin hole, a lower pin shaft 8-15 is installed in the lower bushing 8-14 and the lower pin hole of the supporting torque arm 8-6 and is installed on the supporting torque arm 8-6 through a retaining ring, and the bearing seat 8-10 is installed on the base plate 5-5 through fasteners.

[0036] See Figures 1 to 3 As shown in Figure 7, the gas stirring mechanism 6 of the present invention is used to aerate and stir the material in the tank body 5, and includes a main air pipe 6-1 and multiple groups of aeration units 6-2. The main air pipe 6-1 is connected to an air compressor, and the material is stirred by the compressed gas generated by the air compressor. Since the air compressor can take gas from the upper space of the tank body 5 and reuse the odorous body in the reactor, there is no need to set up an odor treatment system, which can reduce the treatment cost of the hydrolysis reactor.

[0037] See Figure 7As shown, the aeration units 6-2 of the present invention are placed in each aeration tank 5-51 of the bottom plate 5-5, and the aeration units 6-2 are arranged on both sides of the lower part of each stirring main shaft 8-1 and located in the stirring blind area of ​​the corresponding stirring blade 8-2. Since the gas stirring area can intermittently spray compressed gas to stir the materials in the reactor, the combination of mechanical stirring and compressed gas stirring can reduce and strengthen the dead zone between the stirring blades 8-2, increase the overall stirring intensity and the effective volume of the reactor. Figure 7 As shown, the aeration unit 6-2 of the present invention includes an aeration main pipe and aeration pipes arranged and fixed on both sides of the aeration main pipe. The aeration main pipe is connected to the main pipe 6-1 through the branch pipe 6-3. The compressed gas is distributed to each branch pipe 6-3 through the main pipe 6-1, and then enters the aeration pipe through the aeration main pipe, so that the compressed gas is sprayed out from the two ports of the aeration pipe to stir the material. Figure 2 , 7 As shown, the nozzle length of the aeration pipe of the aeration unit 6-2 in the first channel a and the second channel b of the present invention corresponds to the axial length of the plurality of stirring blades 8-2 on the stirring main shaft 8-1, thereby being able to maximize the effective volume.

[0038] See Figure 2 , 3 As shown in Figures 7 and 8, the bottom surface of the aeration groove 5-51 on the bottom plate 5-5 of the present invention is a horizontal plane, and the two side outlets of the aeration pipe are opposite to the groove wall of the groove; or the bottom surface of the aeration groove 5-51 on the bottom plate 5-5 of the present invention is an upward inclined surface of 3-8° along the material flow direction, and one side outlet of the aeration pipe is opposite to the groove wall of the groove, so that the material can be stirred and the material can be slowly and steadily transported from the feed side to the discharge side.

[0039] See Figure 1 , 2As shown in Figure 7, the gas discharge mechanism 1 of the present invention is used to discharge the material in the pool body 5, including a discharge tank 1-1 with a conical bottom and a discharge pipe 1-2. The discharge tank 1-1 is arranged outside the pool body 5, and the air holes 1-11 on the discharge tank 1-1 are respectively connected to the vacuum pump and the air compressor through pipelines. The pipeline is provided with a switching valve for switching between the vacuum pump and the air compressor. The pool wall 5-1 is provided with at least two discharge pipes 1-2 with discharge valves at the bottom of the front wall panel. One end of the discharge pipe 1-2 is communicated with the second channel b of the pool body 5, and the other end is connected to the discharge tank 1-1. The feed ports 1-13 are connected and communicated with each other. The discharge tank 1-1 is provided with four feed ports 1-13. The diameter of the feed ports 1-13 is between 200-350mm, which is suitable for the discharge of various types of organic waste after biological hydrolysis. The four discharge pipes 1-2 are connected with the four discharge ports 1-12. The vacuum pump is used to suck the material in the tank body 5 into the discharge tank 1-1. The vacuum pump provides the suction power for the discharge tank 1-1 to feed. The feed ports of the discharge tank 1-1 can work alternately to suck the material after the hydrolysis reaction from the discharge pipe 1-2 into the discharge tank 1-1. The discharge port at the bottom of the discharge tank 1-1 of the present invention is connected and communicated with the main pipe 3. The air compressor is used to provide compressed gas to press the material in the discharge tank 1-1 into the main pipe 3. The compressed gas is used to press the material from the discharge port 1-12 into the main pipe and discharge it, which effectively solves the problem of discharge blockage.

[0040] See Figure 1 As shown, when the present invention is working, various types of organic waste of 50mm-150mm can be delivered to the first channel a of the tank body 5 through the screw conveyor 4-2, the discharge valve on the discharge pipe 1-2 is closed, the feeding valve is opened, and the appropriate proportion of sludge and biogas slurry and the required extracellular hydrolase are added to the tank body 5 through the external pump through the main pipe 3 and the feeding pipe 2 according to the moisture content and viscosity characteristics of the organic waste, and the feeding valve on the feeding pipe 2 is closed. The motor 8-3 is started to drive the stirring main shaft 8-1, and the material, the bacterial strain and the enzyme in the tank body 5 are fully mixed by the stirring blade 8-2. The aeration unit 6-2 performs gas stirring on the material outside the stirring area of ​​the stirring blade 8-2 at intervals to mix the material with the bacterial strain and the enzyme. Under the combined action of mechanical and gas stirring, the material is pushed forward to continuously convert the biodegradable and biodegradable part and the solid phase in the organic matter into the liquid phase, so that the material flows continuously from the first channel a to the second channel b to the discharge side. After the hydrolysis reaction of the material, Open the discharge valve on the discharge pipe 1-2, start the vacuum pump and introduce vacuum gas into the discharge tank 1-1, suck the material on the discharge side of the second channel into the discharge tank 1-1, and after it is filled with the material, switch the valve to connect the air compressor, and the compressed gas presses the material from the discharge port 1-12 of the discharge tank 1-1 to the main pipe 3, and transports it to the subsequent dehydration device, and separates the solid-liquid material after hydrolysis in the reactor to obtain an organic slurry rich in volatile fatty acids and a solid residue with a high solid content. The organic slurry is further dehumidified to produce biogas by anaerobism, and the solid residue is used to make garbage-derived fuel.

Claims

1. An organic waste biohydrolysis reactor, characterized in that: It includes a tank body, a feeding mechanism, a mechanical stirring mechanism, a gas stirring mechanism and a gas discharging mechanism; The pool body is used to hold materials, and includes a bottom plate, a top plate and surrounding pool walls to form a sealed and heat-insulating pool body. The bottom plate is provided with a middle partition to divide the pool body into a first channel and a second channel that are connected at the rear and allow materials to flow in the pool body. The bottom plate is provided with a plurality of concave aeration grooves for placing explosion units in the first channel and the second channel. The exhaust port provided on the top plate is connected to the air compressor for reuse through a return air pipe. A heater is provided on the pool wall, and a feeding mechanism and a gas discharge mechanism are provided on the front side of the pool wall respectively. A feeding pipe with a feeding valve is also provided on the pool wall at the lower part of the feeding mechanism, and the feeding pipe is connected to the main pipe. The feeding mechanism is used to add materials into the pool body, and includes a screw conveyor, which is installed in the middle and upper part of the front wall plate of the pool wall, and the discharge port of the screw conveyor is connected to the first channel; The mechanical stirring mechanism is used to perform plug-flow stirring on the materials in the pool body, and includes at least two groups of stirring units independently and arranged in parallel, wherein the stirring unit includes a motor, a stirring main shaft and stirring blades, wherein the stirring main shaft is installed on the side wall plates on both sides of the pool wall through bearings, and the stirring main shaft passes through the middle partition plate, one end of the stirring main shaft extends out of the side wall plate and is connected to the motor through a reducer, and the stirring main shaft has a plurality of stirring blades and is correspondingly arranged in the first channel and the second channel; The gas stirring mechanism is used to aerate and stir the materials in the tank body, and includes a main air pipe and multiple aeration units. The main air pipe is connected to an air compressor. The aeration units are placed in each aeration tank of the bottom plate, and two aeration units are correspondingly arranged on both sides of the lower part of each stirring main shaft and located in the stirring blind area of ​​the corresponding stirring blade. The aeration unit includes an aeration main pipe and aeration pipes fixed and arranged on both sides of the aeration main pipe. The aeration main pipe is connected to the main air pipe through a branch pipe. The gas discharge mechanism is used to discharge the material in the pool body, and includes a discharge tank with a conical bottom and a discharge pipe. The discharge tank is arranged outside the pool body, and the air holes on the discharge tank are respectively connected to the vacuum pump and the air compressor through pipelines. The pipeline is provided with a switching valve for switching between the vacuum pump and the air compressor. The pool wall is provided with at least two discharge pipes with discharge valves at the bottom of the front wall panel. One end of the discharge pipe is connected to the front end of the second channel of the pool body, and the other end is connected to the feed port of the discharge tank. The vacuum pump is used to suck the material in the pool body into the discharge tank. The discharge port at the bottom of the discharge tank is connected to the main pipe, and the air compressor is used to provide compressed gas to press the material in the discharge tank into the main pipe.

2. The organic waste biohydrolysis reactor according to claim 1, characterized in that: The pool body is rectangular, and the inner wall corners of the two side wall panels and the rear wall panel of the pool wall are provided with guide arc surfaces. One of the side wall panels of the pool wall is provided with an inspection door, and an overpressure protection valve is also installed on the upper part of the pool wall; a feed bracket is provided on the middle and upper part of the front wall panel of the pool wall, and the screw conveyor is obliquely installed on the feed bracket, and the front wall panel on the feed side is provided with an observation window.

3. The organic waste biohydrolysis reactor according to claim 1, characterized in that: The pool wall is provided with temperature sensors on the inner sides of the two side wall panels and the rear wall panel.

4. The organic waste biohydrolysis reactor according to claim 1, characterized in that: The pool wall is hollow, and the heater comprises a plurality of groups of heating coils with the same heating area, each heating coil is installed in the cavity of the pool wall, and the outer side of the pool wall and the top plate are provided with a heat-insulating layer.

5. The organic waste biohydrolysis reactor according to claim 1, characterized in that: The stirring main shaft comprises a rectangular shaft section and circular shaft sections at both ends. The circular shaft section of the stirring main shaft is installed on a bearing seat through a bearing. The bearing seat is detachably installed on a sealing seat. The sealing seat is installed on a side wall panel. The packing seal assembly is installed on the sealing seat and seals the circular shaft section.

6. The organic waste biohydrolysis reactor according to claim 1, characterized in that: The stirring blades are spaced apart axially along the stirring main shaft and are evenly distributed circumferentially. The stirring blades include two support rods and an I-shaped channel steel fixed at one end of the two support rods. A pad is fixed at the other end of the two support rods, and the pad is installed on the stirring main shaft through fasteners.

7. The organic waste biohydrolysis reactor according to claim 1, characterized in that: The reducer is mounted on a torque support plate, both sides of the torque support plate are hinged to the upper ends of the support torque arms through upper pins, and the lower parts of the two support torque arms are hinged to the corresponding bearing seats through lower pins.

8. The organic waste biohydrolysis reactor according to claim 7, characterized in that: The torque support plate is provided with mounting holes on both sides, and upper shaft sleeves are provided in the mounting holes. The upper part of the supporting torque arm is provided with an upper pin hole, and the lower part is provided with a lower pin hole. The upper pin shaft is installed in the upper shaft sleeve and the upper pin hole of the supporting torque arm and is installed on the supporting torque arm through a retaining ring. The compensation rings are respectively arranged on both sides of the shaft sleeve and are sleeved on the upper pin shaft; the bearing seat is provided with a lower pin hole, and a lower shaft sleeve is provided in the lower pin hole. The lower pin shaft is installed in the lower shaft sleeve and the lower pin hole of the supporting torque arm and is installed on the supporting torque arm through a retaining ring. The bearing seat is installed on the base plate.

9. The organic waste biohydrolysis reactor according to claim 1, characterized in that: The nozzle lengths of the aeration pipes of the aeration units in the first channel and the second channel correspond to the axial lengths of the plurality of stirring blades on the stirring main shaft.

10. The organic waste biohydrolysis reactor according to claim 1, characterized in that: The bottom surface of the aeration tank on the bottom plate is a horizontal plane, and the outlets on both sides of the aeration pipe are opposite to the tank wall of the groove.

11. The organic waste biohydrolysis reactor according to claim 1, characterized in that: The bottom surface of the aeration tank on the bottom plate is an inclined surface with an upward inclination of 3-8 degrees along the material flow direction, and an outlet on one side of the aeration pipe is opposite to the tank wall of the groove.

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