A wet garbage biochemical reduction treatment system and treatment method

Abstract

The present invention discloses a wet garbage biochemical reduction treatment system and treatment method. The system includes a wet garbage feeding device, a pretreatment module, a biochemical treatment module and an electrical control system; the wet garbage feeding device includes a garbage can elevator and a sorting pool; the pretreatment module is composed of a double-shaft shredder and an extrusion dehydrator directly connected; the biochemical treatment module includes a biochemical bin; the sorting pool is arranged above the pretreatment module; the wet garbage discharge port at the bottom of the sorting pool is located directly above the feed port of the double-shaft shredder; the discharge port of the double-shaft shredder is directly connected to the feed port of the extrusion dehydrator; the extrusion dehydrator is installed at a certain inclination angle to the horizontal plane, the discharge port of the extrusion dehydrator is directly connected to the biochemical bin entrance of the biochemical treatment module, and the solid filter residue after being squeezed and dehydrated by the extrusion dehydrator directly enters the biochemical bin for microbial degradation, thereby achieving reduction and resource utilization. The wet garbage treatment system has the characteristics of high integration, low energy consumption, and the ability to achieve biochemical reduction and resource utilization.

Description

Technical Field

[0001] The invention belongs to the technical field of wet garbage treatment, and relates to a wet garbage biochemical reduction treatment system and a treatment method. Background Art

[0002] After being discarded, wet garbage is very easy to deteriorate and rot in the natural environment, breeding mosquitoes and flies; its leachate and waste gas pollute water and air. With the increasing requirements for environmental protection, on-site treatment of wet garbage, making it harmless and resourceful has become a mainstream solution.

[0003] At present, biochemical reduction equipment is often arranged in a decentralized manner, occupying a large area, with many intermediate transition links and complex pipeline laying; the degradation efficiency of room-temperature strains is generally lower than that of high-temperature strains, and high-temperature strains need to solve the problem of excessive energy consumption due to the temperature environment they require. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a wet garbage biochemical reduction treatment system and treatment method with high integration, low energy consumption and the ability to achieve biochemical reduction and resource utilization.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] The present invention discloses a wet garbage biochemical reduction treatment system, comprising a wet garbage feeding device, a pretreatment module, a biochemical treatment module, and an electrical control system connected with the pretreatment module, the biochemical treatment module and the wet garbage feeding device; the wet garbage feeding device mainly comprises a garbage bin elevator and a sorting tank; the pretreatment module is composed of a double-shaft shredder and an extrusion dehydrator directly connected; the biochemical treatment module mainly comprises a biochemical warehouse; the sorting tank is arranged above the pretreatment module; a wet garbage discharge port is arranged at the bottom of the sorting tank, the wet garbage discharge port of the sorting tank is located just above the feed port of the double-shaft shredder, and the wet garbage materials sorted manually directly enter the feed port of the double-shaft shredder; the discharge port of the double-shaft shredder is directly connected to the feed port of the extrusion dehydrator; the extrusion dehydrator is installed at a certain inclination angle to the horizontal plane, The discharge port of the extrusion dehydrator, i.e., the filter residue discharge port, is directly connected to the biochemical bin entrance of the biochemical treatment module, and the filter residue discharge of the extrusion dehydrator directly enters the biochemical bin; a trash can clamping frame is installed at the bottom of the trash can elevator; the trash can elevator has a lifting hydraulic cylinder, which can lift, rise, flip and dump the trash can on the trash can clamping frame into the sorting pool.

[0007] Furthermore, a heat transfer oil tank is provided at the bottom of the biochemical bin; a heating component is provided at the bottom of the heat transfer oil tank; a mesh plate is provided at the bottom of the sorting pool; a wet garbage discharge port is provided on one side of the mesh plate at the bottom of the sorting pool; a leachate tank is provided on the other side below the mesh plate at the bottom of the sorting pool, and a waste liquid discharge port is provided at the bottom of the leachate tank.

[0008] Furthermore, the heating components are electric heating tube groups, and there are two groups arranged at a certain interval; during the heating stage, the two groups of heating components operate simultaneously; during the insulation stage, the two groups of heating components operate in turn, cyclically opening and closing.

[0009] Furthermore, a plurality of air inlets are arranged on the side wall of the biochemical bin, and duckbill type one-way valves are arranged at the air inlets; and the exhaust outlet at the top of the biochemical bin is connected to the deodorization device.

[0010] Furthermore, a silo temperature transmitter is provided in the biochemical silo; in the thermal oil silo, an oil silo temperature transmitter is provided at a high position and a low position. The oil silo temperature transmitter adopts high and low settings to take into account both oil temperature monitoring and oil silo liquid level changes.

[0011] Furthermore, a stirring shaft is provided in the biochemical bin, the stirring shaft runs through the biochemical bin transversely, and one end of the stirring shaft is connected to a stirring motor outside the biochemical bin.

[0012] Furthermore, the trash can lifter comprises a base rail, a clamping frame, a lifting frame, a turning frame, a hydraulic cylinder, a sprocket group, a chain, a hinge shaft and a connecting piece; the bottom of the hydraulic cylinder is mounted on the base rail of the non-moving component, the top of the push rod of the hydraulic cylinder is equipped with a sprocket group, the chain is mounted on the sprocket, one end of the chain is connected to the turning frame, and the other end is mounted on the connecting piece, and the connecting piece is fixed to the base rail through a feeding weighing sensor; a pair of guide wheel group 1 installed on the lifting frame and a pair of guide wheel group 2 installed on the turning frame are embedded in the guide groove of the base rail, so that the clamping frame, the lifting frame, the turning frame and other moving parts can move along the base rail; a pair of guide wheel group 3 is installed on the clamping frame, and the guide wheel group 3 together with the entire clamping frame is embedded in the guide groove of the lifting frame, and can move up and down along the groove; The flip frame is connected to the clamping frame through a hinge axis. Under the action of the chain tension, the flip frame and the clamping frame perform relative flipping motion around the axis; the reset spring connects the flip frame and the clamping frame, mainly providing restoring force for the reset of the flip frame and the clamping frame during the descent process.

[0013] Furthermore, the extrusion dehydrator comprises a frame, a reduction motor, an extrusion screw shaft, a bearing seat, a feed screen cylinder, a deep dehydration section filter cylinder, a back pressure plate, a back pressure spring and a locking nut; the reduction motor is installed on the frame, one end of the extrusion screw shaft is connected to the reduction motor, and the other end is installed on the bearing seat near the discharge port on the frame; wherein the spiral part of the extrusion screw shaft is a segmented structure, the rear section (feed section), that is, the large pitch section close to the feed end, passes through the feed screen cylinder, and the feed port is installed on the feed screen cylinder; the front section (deep dehydration section), that is, the small pitch gradient section close to the discharge end, is provided with a group of double spiral blades composed of two single spiral blades welded on the spiral shaft at regular intervals, which pass through the deep dehydration section filter cylinder; the front end of the spiral part is the discharge port installed on the frame and the back pressure plate that can slide freely along the axis; one end of the back pressure spring presses against the back pressure plate, and the other end presses against the locking nut.

[0014] Furthermore, the deep dehydration section filter cartridge is composed of two semicircular spliced ​​filter press screen cartridges and a pair of auxiliary extrusion plug plates; the auxiliary extrusion plug plates are arranged between the filter press screen cartridge and the extrusion spiral shaft, and the plug teeth of the auxiliary extrusion plug plates extend into the gap between two adjacent double spiral blade groups of the spiral shaft, which can further tear the material into pieces, making the output particles finer, and improving the reduction and volume reduction effects.

[0015] Furthermore, the extrusion dehydrator is installed at an angle of 30° to the horizontal plane; a forced scraper rod with adjustable length is provided at the discharge port of the extrusion dehydrator; the flange of the discharge port of the extrusion dehydrator is installed on the side wall of the biochemical bin of the biochemical treatment module, and the filter residue discharge of the extrusion dehydrator directly enters the biochemical bin.

[0016] The wet garbage biochemical reduction treatment system of the present invention is a small-scale intelligent wet garbage reduction resource system, which is modularly assembled and highly integrated, and has the functions of material crushing, dehydration, organic matter degradation resource utilization, data collection and the like.

[0017] A wet garbage treatment method using the wet garbage biochemical reduction treatment system of the present invention is as follows: a standard garbage bin containing wet garbage is pushed to the garbage bin clamping frame at the bottom of the garbage bin elevator, and the button box is operated to control its locking, feeding and lifting (counting and weighing are completed during the feeding process), and flipping and dumping into the sorting pool; the wet garbage material is manually sorted in the sorting pool and then enters the crushing module; the double-axis shredder in the crushing module crushes the wet garbage material into small particles, and then enters the directly connected extrusion dehydrator inlet for the next step of material dehydration; the extrusion dehydrator adopts a spiral pressing process for solid-liquid separation; the solid filter residue after squeezing and dehydration by the extrusion dehydrator is discharged from the filter residue discharge port at the front end thereof and enters the biochemical bin of the biochemical treatment module for microbial degradation (microorganisms decompose organic matter), thereby achieving reduction and resource utilization, and the squeezed filtrate can be recovered together with the waste liquid after sorting in the sorting pool and enters the filtrate treatment system (optional).

[0018] Beneficial effects of the present invention:

[0019] The present invention provides a small-scale intelligent wet garbage biochemical reduction and resource utilization system, which has the characteristics of high integration, low energy consumption, no odor, and material resource utilization. The wet garbage materials can be automatically lifted, crushed, squeezed for dehydration and decomposed by microorganisms, achieving a reduction of about 90%, reducing the pressure of transportation and treatment; during the treatment process, the wet garbage materials are converted into organic fertilizer, realizing resource recovery, improving the treatment conditions of landfills and incineration plants, and reducing secondary pollution such as leachate and biogas.

[0020] The wet garbage biochemical reduction treatment system of the present invention adopts a high-temperature bacterial process route to treat wet garbage, integrating the functions of crushing, extrusion dehydration, and organic matter degradation and resource utilization, and has the following main features:

[0021] 1. High integration, with internal integrated crushing and dehydration pre-treatment functions, which can realize direct feeding of wet garbage and organic garbage;

[0022] 2. Low-speed processing technology, low noise in equipment operation;

[0023] 3. All functional components are directly connected, without any extra links, and the equipment size and floor space are small;

[0024] 4. Reasonably control the working mode of the heating component to reduce electricity consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a system composition diagram of a wet garbage biochemical reduction treatment system of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the L-shaped arrangement of the wet garbage biochemical reduction treatment system of the present invention;

[0027] Figure 3 It is a work flow chart of the wet garbage biochemical reduction treatment system of the present invention;

[0028] Figure 4 It is a schematic diagram of the main structure of the biochemical treatment module 4 of the wet garbage biochemical reduction treatment system of the present invention;

[0029] Figure 5 4 is a schematic side view of the biochemical treatment module 4 of the wet garbage biochemical reduction treatment system of the present invention;

[0030] Figure 6 It is a schematic diagram of the feedback part of the electrical control system in the wet garbage biochemical reduction treatment system of the present invention;

[0031] Figure 7 It is a schematic structural diagram of the extrusion dehydrator 7 in the present invention;

[0032] Figure 8 It is a partial enlarged structural schematic diagram of the front section of the extrusion dehydrator 7 in the present invention;

[0033] Fig. 9 It is a schematic structural diagram of the back pressure plate 18 on the extrusion dehydrator 7 in the present invention;

[0034] FIG. 10( a ) and FIG. 10( b ) are schematic structural diagrams of the trash can elevator 1 in the present invention in the forward and reverse directions;

[0035] 10(c) and 10(d) are schematic diagrams of the guide wheel set 1 49 of the trash can lifter 1 of the present invention when it reaches the top of the arc portion of the base guide rail 41 in the positive and negative directions;

[0036] FIG10( e ) is a schematic diagram showing the guide wheel set three 47 of the trash can lifter 1 of the present invention rising to form a triangle with the guide wheel set one 49 and the hinge shaft 50 .

[0037] In the figure: 1, garbage bin elevator 2, sorting tank 3, pretreatment module 4, biochemical treatment module 5, garbage bin 6, double-shaft shredder 7, extrusion dehydrator 8, electric heating tube group A 9, electric heating tube group B 10, stirring motor 11, stirring shaft 12, deodorizing device 13, biochemical bin 14, thermal oil bin 15, reduction motor 16, extrusion screw shaft 17, filter press sieve 18, back pressure plate 19, back pressure spring 20, locking nut 21, auxiliary extrusion plug plate 22, feed port 23, liquid collecting tank 24, Frame 25, feed screen drum 26, bearing seat 27, discharge port 28, forced scraper rod 29, elevator lower limit sensor 30, elevator upper limit sensor 31, feed weighing sensor 32, silo temperature transmitter 33, oil silo temperature transmitter 35, filter residue discharge port 36, filtrate discharge port 37, conical weldment 38, bushing 41, base guide rail 40, clamping frame 42, lifting frame 43, flip frame 44, hydraulic cylinder 45, sprocket group 46, chain 47, guide wheel group three 48, guide wheel group two 49, guide wheel group one 50, hinge shaft 51, connector 52, reset spring A, material conveying direction 60, duckbill one-way valve 61, wet garbage discharge port 62, mesh plate 63, leachate tank DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0039] Example

[0040] like Figure 1As shown, the present invention is a wet garbage biochemical reduction treatment system, that is, a small intelligent wet garbage reduction resource system, which is composed of a wet garbage feeding device, a pretreatment module 3, a biochemical treatment module 4 and an electrical control system; modular assembly, high integration, with material crushing, dehydration, organic matter degradation resource, data collection and other functions; the wet garbage feeding device mainly includes a garbage bin elevator 1 and a sorting tank 2; the pretreatment module 3 mainly includes a double-axis shredder 6 and an extrusion dehydrator 7; the biochemical treatment module 4 mainly includes a biochemical bin 13; the sorting tank 2 is arranged on the pretreatment module 3; a mesh plate 62 is provided at the bottom of the sorting tank 2 for percolating waste liquid in the material; A leachate tank 63 is connected to one side below the mesh plate 62 at the bottom of the sorting pool 2, and a waste liquid discharge port is provided at the bottom of the leachate tank 63, which is connected to the filtrate treatment system; a wet garbage discharge port 61 is provided on the other side of the mesh plate 62 at the bottom of the sorting pool 2, and the wet garbage discharge port 61 is also the feed port of the double-shaft shredder 6; that is, the wet garbage discharge port of the sorting pool 2 is located directly above the feed port of the double-shaft shredder 6, and the wet garbage material sorted manually directly enters the feed port of the double-shaft shredder 6; the discharge port of the double-shaft shredder 6 is directly connected to the feed port of the extrusion dehydrator 7; the discharge port of the extrusion dehydrator 7, i.e., the filter residue discharge port, is directly connected to the inlet of the biochemical bin 13 of the biochemical treatment module 4 (the flange of the filter residue discharge port of the extrusion dehydrator 7 is installed on the side wall of the bin body of the biochemical bin 13 of the biochemical treatment module 4). The pre-treatment module 3 is composed of a double-shaft shredder 6 and an extrusion dehydrator 7 which are directly connected, and the extrusion dehydrator 7 is installed at an angle of 30° to the horizontal plane, and the filter residue discharged from the extrusion dehydrator 7 directly enters the biochemical bin 13. A trash can clamping frame 40 is installed at the bottom of the trash can elevator 1; the trash can elevator 1 has a lifting hydraulic cylinder, which can lift, rise, flip, and dump the trash can 5 on the trash can clamping frame 40 to the sorting pool 2.

[0041] In the wet garbage biochemical reduction treatment system of the present invention, the wet garbage feeding device, the pretreatment module 3 and the biochemical treatment module 4 constitute the mechanical structure part of the equipment; the electrical control system is connected with the pretreatment module 3, the biochemical treatment module 4 and the wet garbage feeding device; the electrical control system mainly includes a driving part, a feedback part and an operating part; the electrical control system mainly controls each driving motor on the equipment, and the operator can manually or automatically operate the equipment through the operation box / human-machine interface.

[0042] A heat transfer oil tank 14 is provided at the bottom of the biochemical tank 13; a heating assembly (two groups of electric heating pipes 8, 9) is provided at the bottom of the heat transfer oil tank 14. The heating assembly (electric heating pipes 8, 9) is provided at the bottom of the heat transfer oil tank 14 and is divided into two groups, arranged at a certain interval, and operates simultaneously during the heating stage, and is opened and closed in turns and cycles during the insulation stage.

[0043] A silo temperature transmitter 32 is provided in the biochemical silo 13 ; four air inlets are provided on the upper side wall of the biochemical silo 13 , and duckbill check valves 60 are provided at the air inlets; and the exhaust outlet at the top of the biochemical silo 13 is connected to the deodorizing device 12 .

[0044] An oil tank temperature transmitter 33 is provided in the thermal oil tank 14; the oil tank temperature transmitter 33 is set high and low (one oil tank temperature transmitter 33 is set at the high position and one at the low position), taking into account both oil temperature monitoring and oil tank liquid level changes.

[0045] like Figure 2 As shown, the garbage bin elevator 1 and the sorting tank 2 constitute the wet garbage feeding device, wherein the sorting tank 2 is arranged on the pretreatment module 3; the pretreatment module 3 is connected with the biochemical treatment module 4 to form an L-shaped assembly structure. The equipment occupies a small area, which is less than 3900×3600 (mm) after assembly, and there is no need to dig an underground buffer tank; the operating height is less than 3000mm, which can be widely adapted to the internal space of a small garbage room, and is used for on-site reduction and resource treatment of organic garbage in communities and rural areas.

[0046] The structure of the biochemical treatment module 4 is shown in FIG. Figure 4 , Figure 5 The biochemical treatment module 4 includes a biochemical bin 13 and a heat transfer oil bin 14; the biochemical bin 13 is a place for wet garbage organic materials to be degraded and recycled. After the output of the extrusion dehydrator 7 enters the biochemical bin 13, the organic matter is degraded into organic fertilizer under the aerobic fermentation of the bacteria. Below the biochemical warehouse 13 is a heat transfer oil warehouse 14, the bottom of which is installed with two groups (four in each group) of evenly spaced electric heating pipe groups 8 and 9, which can cooperate with the temperature sensor group to open and close in turn, and circulate, so that the entire warehouse is evenly heated, and the internal temperature of the heat transfer oil warehouse 14 is controlled within a certain range, providing a suitable constant temperature environment for the activity of the bacteria; a stirring shaft 11 is provided in the biochemical warehouse 13, and the stirring shaft 11 passes through the biochemical warehouse 13 horizontally. Driven by the stirring motor 10, it regularly performs forward and reverse rotation stirring actions to ensure that the temperature of the material inside the warehouse is uniform; four air inlets are provided on the upper part of the side wall of the biochemical warehouse 13, and a duckbill one-way valve 60 is provided at the air inlet to prevent internal exhaust gas leakage; the exhaust outlet at the top of the biochemical warehouse 13 is connected to the deodorizing device 12, and the exhaust gas is extracted and discharged after treatment through the fan.

[0047] Figure 10(a) is a schematic diagram of the structure of the trash can lifter 1. The trash can lifter 1 is mainly composed of a base guide rail 41, a clamping frame 40, a lifting frame 42, a turning frame 43, a hydraulic cylinder 44, a sprocket group 45, a chain 46, a hinge shaft 50, a connecting piece 51, etc. It is a set of mechanisms in which a hydraulic cylinder drives a chain to lift and turn. The implementation method is as follows: the bottom of the hydraulic cylinder 44 is installed on the non-moving component base guide rail 41 (the others are moving parts), the top of the push rod of the hydraulic cylinder 44 is installed with a sprocket group 45, the chain 46 is mounted on the sprocket, one end is connected to the turning frame 43, and the other end is installed on the connecting piece 51, and the connecting piece 51 is fixed to the base guide rail 41 through the feeding weighing sensor 31. On; a pair of guide wheel groups 1 49 (one on each side) are installed on the lifting frame 42, and the guide wheel group 1 49 and a pair of guide wheel groups 2 47 (one on each side) installed on the flipping frame 43 are embedded in the guide groove of the base guide rail 41, so that the moving parts such as the clamping frame 40, the lifting frame 42, and the flipping frame 43 can move along the base guide rail 41; a pair of guide wheel groups 3 48 (one on each side) are installed on the clamping frame 40, and the guide wheel group 3 48 together with the entire clamping frame 40 are embedded in the guide groove of the lifting frame 42, and can move up and down along the groove; the flipping frame 43 is connected to the clamping frame 40 through a hinge shaft 50 (one on each side), and under the action of the chain tension, the flipping frame 43 and the clamping frame 40 perform relative flipping movement around the axis; the reset spring 52 connects the flipping frame 43 and the clamping frame 40, mainly to provide a restoring force for the reset of the flipping frame and the clamping frame during the descent process.

[0048] When working, first place the trash can 5 close to the clamping frame 40 so that the flange of the trash can 5 extends between the clamping frame 40 and the lifting frame 42. The lifting process is shown in Figure 10 (a). The push rod of the hydraulic cylinder 44 rises. Under the action of the chain pulling, the clamping frame 40 and the flip frame 43 rise together (supplementary explanation: during the rising and falling process, the clamping frame 40 and the flip frame 43 are regarded as one body, the same as above and below, and during the whole working process, there is only rotational movement around the hinge axis 50 between them). At this time, the guide wheel group 2 48 moves upward along the groove of the lifting frame 42, and the guide wheel group 3 47 moves upward along the groove of the base guide rail 41, while the lifting frame 42 is stationary under the action of its own weight; as the push rod of the hydraulic cylinder 44 rises and the chain pulls, the clamping frame 40 rises to support the lifting frame 42, and the clamping of the trash can flange is completed; The push rod of the hydraulic cylinder 44 continues to rise, and the clamping frame 40, the turning frame 43, and the lifting frame 42 are integrated and rise together. At this time, the guide wheel group 1 49 and the guide wheel group 3 47 move upward along the groove of the base guide rail 41; when the guide wheel group 1 49 reaches the top of the arc part of the base guide rail 41, as shown in Figure 10(b), the guide wheel group 1 49 becomes the hinge point, and the hinge shaft 50 is the hinge point; because the push rod of the hydraulic cylinder 44 is still rising, the guide wheel group 3 47 will continue to rise; thus, the motion trajectory can be obtained, as shown in Figure 10(c): the above three points (i.e., components 47, 49, and 50) form a solid triangle; since the clamping frame 40 and the lifting frame 42 are relatively stationary, the distance between components 49-50 remains unchanged; components 50-47 are two components on the same part of the turning frame 43, Therefore, the distance between the components 50-47 remains unchanged; when the guide wheel set 3 47 rises to the position 47', a unique triangle is obtained, namely the dotted triangle shown in the figure. Therefore, the clamping frame 40, the lifting frame 42, and the trash can 5 are turned over.

[0049] Figure 7 , Figure 8 , Fig. 9 Schematic diagram of the internal structure of the extrusion dehydrator 7. Figure 7As shown, the reduction motor 15 is installed on the frame 24, one end of the extrusion screw shaft 16 is connected to the reduction motor 15, and the other end is installed on the bearing seat 26 near the discharge port 27 on the frame 24; wherein, the spiral part of the extrusion screw shaft 16 is a segmented structure, the rear section (feeding section), that is, close to the feed end, is a large pitch section, passing through the feed screen cylinder 25 (the feed port 22 is installed on the feed screen cylinder 25), and mainly plays the function of conveying and preliminary dehydration; the front section (deep dehydration section), that is, close to the discharge end, is a small pitch gradient section, on which a group of double spiral blade groups composed of two single spiral blades welded on the extrusion screw shaft at regular intervals are arranged, passing through the deep dehydration section filter cylinder. The deep dehydration filter cartridge is composed of two semicircular spliced ​​filter press screens 17 and a pair of auxiliary extrusion plugs 21. The plug teeth of the auxiliary extrusion plugs 21 extend into the gap between two adjacent positive and negative spiral blade groups to increase the shear force on the material, thereby achieving deep dehydration and volume reduction. The front end of the spiral part is a discharge port 27 mounted on the frame 24 and a conical back pressure plate 18 that can slide freely along the axis; Fig. 9 As shown, the back pressure plate 18 includes a conical welded part 37 with a central axis hole, and a bushing 38 (oil-free bushing self-lubricating bearing) tightly fitted and embedded inside the central axis hole of the conical welded part 37. The two are regarded as a whole component during assembly and use and are not disassembled. The back pressure plate 18 is passed through the extrusion screw shaft 16 and can slide freely along the shaft. The back pressure plate 18 has no fixed connection with any other parts. The main function of the back pressure plate 18 is that the back pressure spring 19 behind it continuously provides resistance to pushing materials, thereby giving pressure to the materials and the side wall of the screen drum for dehydration. When there is no material inside, under the compression of the back pressure spring 19, the back pressure plate 18 is close to the discharge port 27; when the internal material is pushed out, the pushing force of the material eventually overcomes the spring resistance, and the back pressure plate 18 is separated from the discharge port 27 to achieve discharge. For the movement of the back pressure plate 18 during discharge operation, please refer to Figure 8 . One end of the back pressure spring 19 presses against the back pressure plate 18, and the other end presses against the locking nut 20, providing sufficient pressure for material dehydration. When the dehydrator is stopped, the initial preload force of the back pressure plate 18 can be changed by adjusting the locking nut 20 to balance the discharge speed and dehydration effect; the double locking nut structure, that is, there are two adjacent locking nuts 20; the locking nut 20 is a fine thread; the two adjacent locking nuts 20, namely the double locking nut structure, play an anti-loosening role. A length-adjustable forced scraping rod 28 is provided on the inner wall of the discharge port 27 near the outlet side, which can add tangential resistance to the discharge, perform forced scraping, and prevent blockage.

[0050] The working principle of the extrusion dehydrator 7 in the present invention is as follows: when the extrusion dehydrator 7 is working, after the first process of crushing, the wet garbage material with a size of 5-10mm is lifted and transported by the scraper conveyor 8, and continuously enters the extrusion dehydrator from the feed port 22. Driven by the reduction motor 15, the extrusion screw shaft 16 conveys the material in the direction indicated by the arrow in the figure (material conveying direction A). With the change of the pitch of the spiral blade, the cavity formed by the extrusion screw shaft 16 and the inner wall of the screen cylinder (feeding screen cylinder 25, filter press screen cylinder 17) gradually decreases in unit volume. Under the resistance of the conical back pressure plate 18 at the discharge port 27, the pressure in the cavity gradually increases; the moisture in the material is forced to squeeze out of the screen and flow into the filtrate buffer tank 10 through the drainage pipe of the liquid collecting tank 23; in this process, the auxiliary extrusion plug plate 21 produces a shearing effect on the propelled material, making the material particles finer, and the dehydration effect and discharge volume reduction effect are more obvious. When the internal pressure reaches a certain level, the back pressure plate 18 is pushed open, and the filter residue begins to be discharged (the filter residue comes out from the opening between the back pressure plate 18 and the discharge port 27, and a filter residue discharge port 35 is provided outside the opening. The filter residue discharge port 35 is a sleeve provided outside the opening between the back pressure plate 18 and the discharge port 27, and is fixed on the frame); after the opening is pushed open to a certain size, the internal pressure of the cavity and the pressure (elastic force) of the back pressure spring 19 reach a dynamic balance, such as Figure 8 As shown, the discharge speed of the filter residue also presents a continuous and stable state, thereby achieving the effect of extrusion dehydration and solid-liquid separation.

[0051] Figure 3 It is the work flow chart of the present invention. Figure 3As shown, the wet garbage treatment method using the wet garbage biochemical reduction treatment system of the present invention (that is, the workflow of the wet garbage biochemical reduction treatment system of the present invention) is as follows: push the garbage can 5 (standard 120L / 240L wet garbage can) filled with wet garbage to the clamping frame 40 at the bottom of the garbage can elevator 1, and operate the button box to control its locking, feeding and lifting (counting and weighing are completed during the feeding process), and flipping and dumping to the sorting pool 2; the panel at the bottom of the sorting pool 2 is a mesh plate 62, which is used to filter the waste liquid in the material; after the wet garbage material is manually sorted on the mesh plate 62 at the bottom of the sorting pool 2, the material is manually removed by the worker and enters the low-speed double-shaft shredder 6 from the wet garbage discharge port 61 on the mesh plate 62 at the bottom of the sorting pool 2; The low-speed double-shaft shredder 6 crushes the wet garbage material into particles of 5-10 mm in size, and enters the feeding port of the directly connected extrusion dehydrator 7 for the next step of material dehydration; the extrusion dehydrator 7 adopts a screw pressing process for solid-liquid separation. Under the premise of ensuring that the discharge speed and processing volume meet the use requirements, it is set to be installed at an angle of 30° with the horizontal plane, so that the discharge port (filter residue discharge port 35) of the extrusion dehydrator 7 is high enough to directly feed the material into the biochemical bin 13 of the biochemical treatment module 4; the flange of the discharge port of the extrusion dehydrator 7 is installed on the side wall of the bin body of the biochemical bin 13 of the biochemical treatment module 4; the solid filter residue after being squeezed and dehydrated by the extrusion dehydrator 7 is discharged from the filter residue discharge port 35 at its front end into the biochemical bin 13 of the biochemical treatment module 4 for microbial degradation (microorganisms decompose organic matter), achieving reduction and resource utilization, and the squeezed filtrate can be recycled together with the waste liquid sorted by the sorting tank 2 and enter the filtrate treatment system (optional).

[0052] Figure 6 It is the feedback part of the electrical control system. Figure 6 As shown, the lower limit sensor 29, the upper limit sensor 30, and the loading weighing sensor 31 of the elevator are respectively installed on the base rail 41 of the elevator (i.e., the trash can elevator 1). When the elevator flips to the upper limit position of the set angle, the upper limit sensor 30 of the elevator senses and sends a signal to stop the hydraulic cylinder 44 from continuing to rise; when the empty bucket after unloading falls into place, the lower limit sensor 29 of the elevator senses and sends a signal to stop the hydraulic cylinder 44 from continuing to fall. During the material lifting process, the loading weighing sensor 31 will weigh the material and feed back the data to the PLC control system for recording.

[0053] like Figure 5As shown, the silo temperature transmitter 32 cooperates with the oil silo temperature transmitter 33 to transmit the material temperature in the silo and oil silo to the PLC control system in real time for monitoring and constant control of the temperature in the silo. During operation, the two groups of electric heating tube groups 8 and 9 are heated in turns and cycles. The silo temperature transmitter 32 is set in the biochemical silo 13. When it is detected that the temperature in the silo (biochemical silo 13) reaches the upper limit, the two groups of electric heating tube groups 8 and 9 stop heating until the temperature in the silo is lower than the set lower limit. The two groups of electric heating tube groups 8 and 9 are restarted in turn; the oil silo temperature transmitter 33 is set in the oil silo (thermal oil silo 14), one at the high and low places, to monitor the oil temperature. When there is a significant difference in the temperature of the two oil silo temperature transmitters 33 at the high and low places, that is, when the oil temperature is abnormal, an alarm is issued to prevent the risk of dry burning.

[0054] The present invention provides a small-scale intelligent wet garbage reduction and resource utilization system, which has the characteristics of high integration, low energy consumption, no odor, and material resource utilization. It can automatically lift, crush, squeeze and dehydrate wet garbage materials and decompose them by microorganisms, achieving a reduction of about 90% and reducing the pressure of transportation and treatment. During the treatment process, the wet garbage materials are converted into organic fertilizer to achieve resource recovery, improve the treatment conditions of landfills and incineration plants, and reduce secondary pollution such as leachate and biogas.

Claims

1. A wet garbage biochemical reduction treatment system, characterized in that: It includes a wet garbage feeding device, a pretreatment module, a biochemical treatment module, and an electrical control system connected with the pretreatment module, the biochemical treatment module and the wet garbage feeding device; the wet garbage feeding device mainly includes a garbage bin elevator and a sorting tank; The pretreatment module is composed of a double-shaft shredder and an extrusion dehydrator directly connected; the biochemical treatment module mainly includes a biochemical bin; the sorting pool is arranged above the pretreatment module; a wet garbage discharge port is arranged at the bottom of the sorting pool, and the wet garbage discharge port of the sorting pool is located directly above the feed port of the double-shaft shredder; the discharge port of the double-shaft shredder is directly connected to the feed port of the extrusion dehydrator; the extrusion dehydrator is installed at a certain inclination angle to the horizontal plane, and the discharge port of the extrusion dehydrator is directly connected to the biochemical bin entrance of the biochemical treatment module; a garbage bin clamping frame is installed at the bottom of the garbage bin elevator; the garbage bin elevator has a lifting hydraulic cylinder, which can lift, rise, flip and dump the garbage bin on the garbage bin clamping frame to the sorting pool; The side wall of the biochemical warehouse is provided with multiple air inlets, each of which is provided with a duckbill one-way valve; the exhaust outlet on the top of the biochemical warehouse is connected to the deodorization device; The trash can lifter comprises a base guide rail, a clamping frame, a lifting frame, a turning frame, a hydraulic cylinder, a sprocket group, a chain, a hinge shaft and a connecting piece; the bottom of the hydraulic cylinder is installed on the non-moving part base guide rail, the top of the hydraulic cylinder push rod is installed with a sprocket group, the chain is mounted on the sprocket, one end of the chain is connected to the turning frame, and the other end is installed on the connecting piece, and the connecting piece is fixed to the base guide rail through a feeding weighing sensor; a pair of guide wheel group 1 installed on the lifting frame and a pair of guide wheel group 2 installed on the turning frame are embedded in the guide groove of the base guide rail, so that the moving parts of the clamping frame, the lifting frame and the turning frame can move along the base guide rail; a pair of guide wheel group 3 is installed on the clamping frame, and the guide wheel group 3 together with the entire clamping frame is embedded in the guide groove of the lifting frame and can move up and down along the groove; the turning frame is connected to the clamping frame through a hinge shaft, and under the action of the chain tension, the turning frame and the clamping frame perform relative turning motion around the axis; a reset spring connects the turning frame and the clamping frame.

2. The wet garbage biochemical reduction treatment system according to claim 1, characterized in that: A heat transfer oil tank is provided at the bottom of the biochemical bin; a heating component is provided at the bottom of the heat transfer oil tank; a mesh plate is provided at the bottom of the sorting pool; a wet garbage discharge port is provided on one side of the mesh plate at the bottom of the sorting pool; a leachate tank is provided on the other side below the mesh plate at the bottom of the sorting pool, and a waste liquid discharge port is provided at the bottom of the leachate tank.

3. The wet garbage biochemical reduction treatment system according to claim 2, characterized in that: The heating components are electric heating tube groups, there are two groups, arranged at a certain interval; in the heating stage, the two groups of heating components operate simultaneously; in the insulation stage, the two groups of heating components operate in turn, cyclically opening and closing.

4. The wet garbage biochemical reduction treatment system according to claim 1, 2 or 3, characterized in that:

5. The wet garbage biochemical reduction treatment system as described in claim 1, 2 or 3 is characterized in that a silo temperature transmitter is provided in the biochemical silo; and an oil silo temperature transmitter is provided at a high position and a low position in the thermal oil silo.

5. The wet garbage biochemical reduction treatment system according to claim 1, 2 or 3, characterized in that: A stirring shaft is arranged in the biochemical bin and penetrates the biochemical bin transversely. One end of the stirring shaft is connected with a stirring motor outside the biochemical bin.

6. The wet garbage biochemical reduction treatment system according to claim 1, 2 or 3, characterized in that: The extrusion dehydrator comprises a frame, a reduction motor, an extrusion screw shaft, a bearing seat, a feed screen cylinder, a deep dehydration section filter cylinder, a back pressure plate, a back pressure spring and a locking nut; The reduction motor is installed on the frame, one end of the extrusion screw shaft is connected to the reduction motor, and the other end is installed on the bearing seat near the discharge port on the frame; wherein, the spiral part of the extrusion screw shaft is a segmented structure, the rear section, i.e. the feeding section, which is close to the feeding end, is a large pitch section, which passes through the feeding screen cylinder, and the feeding port is installed on the feeding screen cylinder; the front section, i.e. the deep dehydration section, which is close to the discharge end, is a small pitch gradient section, and a group of double spiral blades composed of two single spiral blades welded on the spiral shaft at regular intervals are arranged, which pass through the deep dehydration section filter cartridge; the front end of the spiral part is the discharge port installed on the frame and the back pressure plate that can slide freely along the axis; one end of the back pressure spring supports the back pressure plate, and the other end supports the locking nut.

7. The wet garbage biochemical reduction treatment system according to claim 6, characterized in that: The deep dehydration section filter cartridge is composed of two semicircular spliced ​​filter press screen cartridges and a pair of auxiliary extrusion plug plates; the auxiliary extrusion plug plates are arranged between the filter press screen cartridge and the extrusion spiral shaft, and the plug teeth of the auxiliary extrusion plug plates extend into the gap between two adjacent double spiral blade groups of the spiral shaft; the extrusion dehydrator is installed at an angle of 30° to the horizontal plane; a forced scraper rod with adjustable length is provided at the discharge port of the extrusion dehydrator; the flange of the discharge port of the extrusion dehydrator is installed on the side wall of the biochemical bin of the biochemical treatment module.

8. A wet garbage treatment method using the wet garbage biochemical reduction treatment system according to any one of claims 1 to 7, characterized in that: Push the trash can filled with wet garbage to the trash can clamping frame at the bottom of the trash can elevator, and operate the button box to control its locking, loading and lifting, and flipping and dumping into the sorting pool; the wet garbage materials are manually sorted in the sorting pool and then enter the crushing module; the double-axis shredder in the crushing module crushes the wet garbage materials into small particles and then enters the feeding port of the directly connected extrusion dehydrator; the extrusion dehydrator adopts a screw pressing process for solid-liquid separation; the solid filter residue after squeezing and dehydration by the extrusion dehydrator is discharged from the filter residue discharge port at the front end thereof and enters the biochemical bin of the biochemical treatment module for microbial degradation, thereby achieving reduction and resource utilization.

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