CN118221269B - Sewage treatment self-circulation anaerobic digestion reactor - Google Patents

Abstract

The invention relates to a sewage treatment self-circulation anaerobic digestion reactor which comprises a base, a primary digestion furnace, a secondary digestion furnace, a throwing module, a stirring motor, a stirring shaft, a stirring module, a connecting clamping plate, an enhancing module, a gas collecting module and a PH sensing module. According to the invention, the additive is put into the reaction furnace in a multi-direction injection mode at a plurality of positions, the power-switchable stirring modules are arranged and are linked with the putting modules, the high-power powerful mode is automatically switched when the additive is put, the stirring efficiency of sewage is enhanced, the diffusion of the additive in the sewage is accelerated by utilizing multi-direction stirring, vibration and other modes, and the additive is uniformly diffused into the sewage to promote the completion of digestion reaction.

Description

A self-circulating anaerobic digestion reactor for sewage treatment

Technical Field

The present invention relates to the technical field related to sewage treatment, and in particular to a sewage treatment self-circulating anaerobic digestion reactor.

Background Art

Anaerobic digestion refers to the digestion technology of organic matter under anaerobic conditions, where facultative bacteria and anaerobic bacteria decompose biodegradable organic matter into CH4, CO2, H2O and H2S. The entire anaerobic digestion process requires precise control of environmental factors such as temperature, pH value, and nutrient ratio to optimize microbial activity, increase CH4 production and overall treatment efficiency. The generated CH4 can be used for combustion or power generation to achieve resource and energy recovery.

In the existing anaerobic digestion process, such as the Chinese patent with the announcement number CN219689490U, it discloses a high-efficiency anaerobic tower for sewage treatment, including an anaerobic tower body, a return pipe is vertically arranged inside the anaerobic tower body, the bottom end of the return pipe passes through the side wall of the anaerobic tower body and is fixedly connected with an inlet pipe, a water outlet pipe is passed through one side of the top of the anaerobic tower body, the top of the anaerobic tower body is set as a first anaerobic zone, the center of the anaerobic tower body is set as a second anaerobic zone, and the bottom ends of the first anaerobic zone and the second anaerobic zone are set with sedimentation zones.

In the above-mentioned prior art, harmful substances in the raw water are fully diluted mainly by fully mixing a large amount of circulating water and incoming water. However, the above-mentioned prior art does not take into account that there are many factors that affect the digestion reaction, such as temperature, pH, the number and activity of bacterial flora, etc. In the initial stage of sewage digestion reaction, the number of anaerobic bacteria contained therein may be small and the activity is insufficient. It takes a while to carry out a digestion reaction that meets the standards and produce methane. In order to quickly establish a microbial community and shorten the startup time, it is usually necessary to add biological additives to accelerate this process. However, due to the large amount of sewage, the biological additives cannot be quickly and evenly distributed in the sewage. Similarly, this problem also exists when adding chemical additives to adjust the pH value.

Based on this, there is still room for improvement in the above-mentioned prior art.

Summary of the invention

In order to make the additives diffuse more quickly and evenly in the sewage and keep the anaerobic digestion reaction stable and efficient, the present application provides a sewage treatment self-circulating anaerobic digestion reactor.

The present application provides a sewage treatment self-circulating anaerobic digestion reactor adopts the following technical solution:

A sewage treatment self-circulating anaerobic digestion reactor comprises a base, a primary digestion furnace, a secondary digestion furnace, a delivery module, a stirring motor, a stirring shaft, a stirring module, a connecting card plate, an enhancement module, a gas collecting module and a pH sensing module. The upper end of the base is provided with a primary digestion furnace and a secondary digestion furnace from right to left in sequence. The delivery module is evenly arranged on the outer wall of the primary digestion furnace. The delivery module delivers additives to the primary digestion furnace by multiple and multi-point spraying to increase the reaction speed and maintain a stable reaction environment. The stirring motor is installed in the base. The output end of the stirring motor is connected to the stirring shaft. The stirring shaft rotates The stirring module is dynamically arranged inside the primary digester, and the stirring modules are arranged on the stirring shaft from top to bottom in sequence. The adjacent stirring modules are matched by connecting card plates. The stirring module with deformation function has an energy-saving station and a strong station during work. The enhancement module is arranged on the stirring module. The enhancement module enhances the stirring effect of the stirring module to make the stirring more uniform. The lower ends of the gas collecting module are respectively connected to the top of the primary digester and the secondary digester. The gas collecting module collects the gas generated during the reaction. The PH sensing module is arranged in the middle of the stirring shaft. The PH sensing module monitors the pH value inside the primary digester.

Preferably, the base includes a base shell, a feed unit, a transfer unit, and a discharge unit. The feed unit, the transfer unit, and the discharge unit are installed in sequence from right to left inside the base shell. The feed unit is connected to the bottom of the primary digester, and the sewage enters the primary digester from the feed unit. The transfer unit connects the primary digester and the secondary digester. The transfer unit sucks the reacted sludge in the primary digester into the secondary digester to continue the reaction using waste heat. The discharge unit is connected to the bottom of the secondary digester, and after the reaction of the sludge in the secondary digester is completed, it is transferred to the designated area through the discharge unit.

Preferably, the delivery module includes a connecting block, a storage unit, a partition plate, a feed trough, an injection cabin, a sliding column, a push plate, a delivery electric pusher, and an injection mechanism. The connecting block is installed on the side wall of the primary digester. A connecting groove is provided inside the connecting block and is connected to the interior of the primary digester. The storage unit is installed on the right side of the front end of the base shell. Additives are stored in the storage unit, including chemical additives and biological additives. The chemical additives are used to adjust the acid-base balance in the digestion reaction. The biological additives contain specific types of anaerobic bacteria or enzymes and other nutrients that promote the growth of microorganisms. The biological additives are used to enhance the biodegradation efficiency in the anaerobic digestion process. For example, during the start-up phase of the digester, when the digestion efficiency decreases, or when it is desired to increase the gas production, the biological additives can be delivered. To achieve the above purpose, the storage unit is connected with the connecting groove through a conveying pipe, and a partition plate is set in the middle of the connecting groove for sliding left and right. The partition plate divides the connecting groove into an upper feeding groove and a lower injection cabin. In the initial state, the feeding groove and the injection cabin are connected. When the material is put into the feed tank, the partition plate separates the feeding tank and the injection cabin, so that only the additives inside the injection cabin are put into the primary digester, thereby realizing the quantitative delivery of the additives. The sliding column is set inside the partition plate for sliding left and right, and a spring is connected between the sliding column and the partition plate. The spring acts as a support and reset. The end of the sliding column away from the partition plate is installed on the pushing plate, and the pushing plate is installed on the output end of the delivery electric pusher. The delivery electric pusher is installed on the base shell through the motor seat, and the injection mechanism is arranged in the injection cabin.

Preferably, the injection mechanism includes a boost plate, an air pressure balance chamber, a connecting pipe, an L-shaped push rod, a propulsion block, a card block, an unlocking groove, a layered plate, a plug 1, and a plug 2. The boost plate is slidably arranged in the injection cabin, and an air pressure balance chamber connected to the injection cabin is provided inside the connecting block. The air pressure balance chamber is located outside the boost plate, and the air pressure balance chamber is connected to the inside of the primary digestion furnace through a connecting pipe. The inside of the connecting pipe is provided with a filtering structure of the prior art to prevent solid impurities from entering the air pressure balance chamber. A spring 2 is connected between the boost plate and the air pressure balance chamber. , spring two plays a reset role, the L-shaped push rod is set inside the air pressure balance chamber for sliding left and right, an elastic seal is connected between the L-shaped push rod and the air pressure balance chamber, the lower end of the L-shaped push rod is connected to the boost plate, the push block is installed at the lower end of the push plate, the position between the push block and the L-shaped push rod corresponds, the card block is set in the injection cabin for sliding up and down, a spring three is connected between the card block and the injection cabin, the spring three always keeps the card block pushing upward, the upper end of the boost plate is provided with a card slot corresponding to the lower end position of the card block, and the card block in the initial state is inserted into the card The lower end of the partition plate is provided with an unlocking groove corresponding to the upper end position of the card block. In the initial state, the unlocking groove and the card block are in a misaligned state. When the unlocking groove moves to the top of the card block, under the action of spring three, the card block moves upward and is inserted into the unlocking groove, thereby unlocking the position of the pressurized plate. The unlocking groove is trapezoidal. When the partition plate is reset, the card block is squeezed between the oblique sides of the unlocking groove, thereby not hindering the partition plate from being reset, and at the same time, the card block is squeezed and reset. The layered plate is installed at the inner end of the injection cabin, and the layered plate will The inner end of the injection cabin is divided into two injection channels at the bottom. A plug 1 is slidably arranged in the upper injection channel. A spring 4 is connected between the plug 1 and the upper injection channel. The spring 4 plays a resetting role. A T-shaped through groove is provided inside the plug 1. When the additive is sprayed out from the inside of the plug 1, the T-shaped through groove makes the additive spray out in the form of an up-and-down jet inside the first-stage digester, thereby accelerating the diffusion of the additive in the up-and-down directions. A plug 2 is slidably arranged in the lower injection channel. The plug 2 is connected to the booster plate through a connecting rod.

Preferably, the stirring module comprises a stirring frame, an expansion mechanism 1, and a locking mechanism. The stirring frame consists of a stirring member 1, a stirring member 2, a stirring member 3, a stirring member 4, and a stirring member 5. The stirring frame in an initial state is in a retracted state (energy-saving station) to stir the sewage at a low speed and a uniform speed. When the additive is added, the stirring frame expands and unfolds (powerful station) to stir the sewage at a high speed (high speed is a conclusion drawn compared to low-speed stirring, which only increases a certain speed relative to low-speed stirring) and a uniform speed. The stirring member 1 is fixedly mounted on the periphery of the stirring shaft, the stirring member 2 is slidably arranged on the stirring member 1, the upper end of the stirring member 2 is slidably arranged with the stirring member 3, the lower end of the stirring member 2 is slidably arranged with the stirring member 4, the stirring member 4 and the stirring member 5 are slidably matched, the stirring member 5 is slidably arranged on the periphery of the stirring shaft, the expansion mechanism 1 links the stirring member 2 and the stirring member 4, the expansion mechanism 2 links the stirring member 2 and the stirring member 3, the expansion mechanism 2 has the same structure as the expansion mechanism 1, and the locking mechanism locks the position between the stirring member 1 and the stirring member 2.

Preferably, the expansion mechanism 1 includes a threaded column, a rotating gear, and a driving rack plate. The threaded column is rotatably arranged on the stirring member 4, and the stirring member 2 is provided with a threaded groove that cooperates with the threaded column thread. The rotating gear sleeve is installed on the bottom outer periphery of the threaded column, and the stirring member 5 is installed with a driving rack plate that meshes with the rotating gear. When the stirring member 2 moves radially outward, a relative displacement occurs between the rotating gear and the driving rack plate, the rotating gear rotates, and the threaded column follows the rotating gear to rotate, thereby causing the stirring member 4 to descend, and the stirring member 5 follows the stirring member 4 to descend. Similarly, under the action of the expansion mechanism 2, the stirring member 3 slides upward, thereby causing the overall stirring frame to be in an outwardly expanded state, and the contact area between the expanded stirring frame and the sewage is increased, thereby enhancing the stirring effect.

Preferably, the locking mechanism comprises a locking plate, a locking groove, a locking block, a locking pin, a sliding wedge 1, a receiving groove, a sliding wedge 2, a sliding wedge 3, and an unlocking component, the locking plate is mounted on the outer end of the driving rack plate, the locking plate has a locking groove at the lower end, a locking block is provided in the locking groove for sliding up and down, a spring 5 is connected between the locking block and the locking groove, the spring 5 plays a resetting role, the locking pin is arranged in the stirring member 2 for sliding up and down, a spring 6 is connected between the locking pin and the stirring member 2, the spring 6 always keeps the locking pin in a downward trend of pushing the locking pin, the position between the locking pin and the locking groove corresponds to the position between the locking pin and the locking groove in the initial state is inserted into the locking groove, thereby locking the position between the driving rack plate and the stirring member 2 (at this time the stirring frame cannot be expanded and unfolded), the sliding wedge 1 is arranged in the stirring member 2 for sliding left and right sliding movement, the sliding wedge 1 is provided with a receiving groove corresponding to the position of the locking pin, the sliding wedge 2 is arranged in the stirring member 2 for sliding up and down sliding movement, the sliding wedge 2 and the sliding wedge 1 are extruded fit, the sliding wedge 3 is arranged in the stirring member 2 for sliding left and right sliding movement, the sliding wedge 3 and the sliding wedge 2 are extruded fit, and the unlocking component is arranged in a first When the unlocking assembly triggers the sliding wedge 1 to move so that the position between the accommodating groove and the locking pin corresponds, under the action of spring 6, the locking pin moves downward, is inserted into the accommodating groove and disengages from the locking groove, and the position between the driving rack plate and the stirring member 2 is unlocked (the stirring frame can be expanded and unfolded at this time). At the same time, the moving sliding wedge 1 squeezes the sliding wedge 3 outward through the sliding wedge 2. When the stirring frame is expanded and unfolded to the maximum, the sliding wedge 3 contacts the inner wall of the primary digester and is squeezed and reset. Under the action of the sliding wedge 2, the sliding wedge 1 is squeezed and reset, and the locking pin is squeezed and moved upward and reset. Since the stirring frame is in the maximum expansion state at this time, the locking pin moving upward does not contact the driving rack plate. When the stirring frame contracts later, the driving rack plate and the locking pin gradually approach each other, the locking pin contacts and squeezes the locking block, and the locking block is squeezed and moved upward, so that the locking pin smoothly crosses the locking block and enters the locking groove, thereby re-locking the position between the driving rack plate and the stirring member 2.

Preferably, the unlocking assembly includes an unlocking plate, bevel gear one, bevel gear two, a rotating rod, an extrusion block, an elastic rod, and an extrusion layer. The unlocking plate is rotatably arranged on the side wall of the connecting block located inside the primary digester through a pin shaft. The unlocking plate in an initial state is parallel to the side wall of the connecting block. At this time, the unlocking plate closes the injection channel. When the unlocking plate is rotated ninety degrees, the unlocking plate unlocks the locking mechanism. Thereafter, the unlocking plate is rotated ninety degrees again and is parallel to the side wall of the connecting block, thereby avoiding the stirring frame unfolded after unlocking. An avoidance groove is provided in the middle of the top end of the unlocking plate, and bevel gear one is installed in the avoidance groove. Bevel gear two is installed at the end of the rotating rod, and bevel gear two is meshed with bevel gear one. The rotating rod is rotatably arranged on the connecting block. A spring seven is connected between the rotating rod and the connecting block, and spring seven is a torque spring. , spring seven plays a reset role, two extrusion blocks are arranged alternately on the outer circumference of the rotating rod, and the extrusion blocks are arranged 90 degrees apart in the circumferential direction of the rotating rod. The extrusion layers are squeezed with the extrusion blocks in turn, so that the rotating rod is rotated 180 degrees. Under the meshing action of bevel gear one and bevel gear two, the unlocking plate is rotated 180 degrees (rotated twice, a single rotation of 90 degrees). Since the rotating rod is rotatably arranged in the connecting block, this design ensures the sealing performance compared to the sliding connection. The elastic rod is slidably arranged inside the connecting block. The elastic rod is an elastic and retractable structure. A spring eight is connected between the elastic rod and the connecting block. The spring eight plays a reset role. One end of the elastic rod corresponds to the position between the sliding column, and the other end of the elastic rod is provided with a blind hole groove. The interior of the blind hole groove is provided with an extrusion layer, and the extrusion layer and the extrusion block are extrusion-fitted.

Preferably, the enhancement module includes a pushing unit, a screw rod, a cam member, a vibration plate, a wave plate, a trigger switch, and a trigger pressure member. The pushing unit is installed on the stirring shaft, and an auxiliary member is installed on the output end of the pushing unit. A screw rod is arranged on the auxiliary member through the rotation of an electric turntable, and the other end of the screw rod is rotatably arranged on the stirring member 2. The screw rod is an elastic and retractable structure, and the spiral amplitude of the outer side of the screw rod is greater than the spiral amplitude of the inner side. When the screw rod rotates, the large spiral on the outer side of the screw rod will quickly stir and transport the additives on the outer periphery of the primary digester to the inside. After transporting a certain distance, the large spiral on the outer side of the screw rod becomes a small spiral. At this time, the screw rod still stirs and transports the additives to the inside, but more Add a small amount evenly to avoid excessive accumulation of additives in the middle. The cam part is installed at the end of the spiral rod away from the stirring shaft. The vibration plate is slid up and down in the stirring member 2. A spring 9 is connected between the vibration plate and the stirring member 2. The spring 9 plays a supporting and resetting role. The position of the vibration plate corresponds to that of the cam part. Wave plates are installed on both sides of the lower end of the vibration plate. When the cam part rotates, it continuously hits the vibration plate to make it vibrate. The wave plate vibrates up and down following the vibration plate, thereby accelerating the diffusion of the additives in the up and down directions. The trigger switch is installed on the side wall of the first-level digestion furnace. The trigger switch is electrically connected to the push unit. A trigger pressure piece corresponding to the position of the trigger switch is installed in the middle of the push plate.

Preferably, the connecting card connects the stirring member three and the stirring member four in the adjacent stirring modules. The connecting card is installed at the bottom of the stirring member four located above. The position of the connecting card corresponds to the stirring member three. When the stirring frame is expanded and unfolded, the stirring member three located below is inserted into the card slot formed by the connecting card between the two adjacent stirring frames, so that the two adjacent stirring frames are clamped together to enhance the stability of the structure.

In summary, the beneficial technical effects of this application are as follows:

The self-circulating anaerobic digestion reactor for sewage treatment described in the present invention adds additives into the reactor by multi-directional spraying at multiple positions, and is provided with a power-switchable stirring module, which is linked with the delivery module, and automatically switches to a high-power strong mode when adding additives, thereby enhancing the stirring efficiency of sewage, and utilizing multi-directional stirring, vibration and other methods to accelerate the diffusion of additives in sewage, so that the additives are evenly diffused in the sewage to promote the completion of the digestion reaction.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is a cross-sectional view of the overall structure of the present invention;

3 is a schematic diagram of the structure of the stirring shaft, stirring module and enhancement module of the present invention;

FIG4 is a partial enlarged view of point A in FIG3 of the present invention;

FIG5 is a partial enlarged view of point B of FIG3 of the present invention;

FIG6 is a schematic diagram of the structure of the delivery module of the present invention;

FIG7 is a partial enlarged view of point C of FIG6 of the present invention;

FIG8 is a schematic diagram of the structure of the bevel gear 2, the rotating rod, the extrusion block, the elastic rod, and the extrusion layer of the present invention.

Description of the accompanying drawings: 1. base; 2. primary digestion furnace; 3. secondary digestion furnace; 4. delivery module; 5. stirring motor; 6. stirring shaft; 7. stirring module; 8. connecting card plate; 9. enhancement module; 10. gas collection module; 11. PH sensing module; 12. base shell; 13. feeding unit; 14. transfer unit; 15. discharging unit; 41. connecting block; 42. storage unit; 421. conveying pipe; 43. partition plate; 411. feeding trough; 412. injection cabin; 44. sliding column; 45. pushing plate; 46. delivery electric pusher; 47. injection mechanism; 471. booster plate; 413. air pressure balance chamber; 414. connecting pipe; 472. L-shaped push rod; 473. push block; 474. card block; 475. unlocking groove; 476. layering plate; 477. plug one; 478. Plug 2; 71, stirring member 1; 72, stirring member 2; 73, stirring member 3; 74, stirring member 4; 75, stirring member 5; 76, expansion mechanism 1; 77, locking mechanism; 761, threaded column; 762, rotating gear; 763, driving rack plate; 771, locking plate; 772, locking groove; 773, locking block; 774, locking pin; 775, sliding wedge 1; 776, accommodating groove; 777, sliding wedge 2; 778, sliding wedge 3; 779, unlocking assembly; 780, unlocking plate; 781, bevel gear 1; 782, bevel gear 2; 783, rotating rod; 784, extrusion block; 785, elastic rod; 786, extrusion layer; 91, pushing unit; 92, spiral rod; 93, cam member; 94, vibration plate; 95, wave plate; 96, trigger switch; 97, trigger pressure member.

DETAILED DESCRIPTION

The present application is further described in detail below in conjunction with Figures 1 to 8.

The embodiment of the present application discloses a self-circulating anaerobic digestion reactor for sewage treatment, which adds additives into the reactor by multiple and multi-point injections, and accelerates the diffusion of the additives in the sewage by means of multi-directional stirring and vibration, so that the additives are evenly diffused in the sewage to promote the completion of the digestion reaction.

Referring to Figures 1 and 2, a sewage treatment self-circulating anaerobic digestion reactor includes a base 1, a primary digestion furnace 2, a secondary digestion furnace 3, a delivery module 4, a stirring motor 5, a stirring shaft 6, a stirring module 7, a connecting card plate 8, an enhancement module 9, a gas collection module 10, and a pH sensing module 11. The upper end of the base 1 is provided with a primary digestion furnace 2 and a secondary digestion furnace 3 from right to left, the delivery module 4 is evenly arranged on the outer wall of the primary digestion furnace 2, the delivery module 4 delivers additives to the primary digestion furnace 2 by multiple and multi-point spraying to increase the reaction speed and maintain a stable reaction environment, the stirring motor 5 is installed in the base 1, and the output end of the stirring motor 5 is connected to the stirring shaft 6 The stirring shaft 6 is rotatably arranged inside the primary digestion furnace 2. The stirring modules 7 are arranged on the stirring shaft 6 in sequence from top to bottom. The adjacent stirring modules 7 are matched by connecting card plates 8. The stirring module 7 with deformation function has an energy-saving position and a strong position during work. The enhancement module 9 is arranged on the stirring module 7. The enhancement module 9 enhances the stirring effect of the stirring module 7 to make the stirring more uniform. The lower ends of the gas collecting module 10 are respectively connected to the top of the primary digestion furnace 2 and the secondary digestion furnace 3. The gas collecting module 10 collects the gas generated during the reaction. The PH sensing module 11 is arranged in the middle of the stirring shaft 6. The PH sensing module 11 monitors the pH value inside the primary digestion furnace 2.

In the actual process of sewage treatment, the sewage to be treated enters the primary digestion furnace 2 from the base 1, and the stirring motor 5 drives the stirring module 7 to rotate through the stirring shaft 6, so as to stir the sewage. In order to quickly increase the reaction rate of anaerobic digestion to the specified value, additives are added to the primary digestion furnace 2 through the delivery module 4. The delivery module 4 in operation triggers the enhancement module 9, and the enhancement module 9 accelerates the diffusion of the additives by multi-directional stirring and vibration. At the same time, the enhancement module 9 triggers the stirring module 7 to expand and unfold. The expanded stirring module 7 is connected together by the connecting card plate 8. The contact area between the stirring module 7 and the sewage is increased, thereby enhancing the stirring effect of the stirring module 7. At the same time, the expanded stirring module 7 is connected to one The inner wall of the primary digester 2 is scraped to prevent sludge from adhering. After the additive is evenly stirred, each module is reset. The stirring motor 5 drives the stirring module 7 to stir at a low speed and uniform speed through the stirring shaft 6. The digestion reaction proceeds stably. After a specified time, the sludge inside the primary digester 2 is transferred to the secondary digester 3 for secondary digestion reaction. The gas collection module 10 collects the gas generated by the digestion reaction, and the pH sensing module 11 always monitors the pH value inside the primary digester 2. The present application performs multi-directional additive injection at multiple positions, uses multi-directional stirring methods, and uses vibration to accelerate diffusion, so that the additive can be quickly and evenly diffused in the sewage, thereby ensuring a rapid and stable digestion reaction.

As shown in Figure 2, the base 1 includes a base shell 12, a feed unit 13, a transfer unit 14, and a discharge unit 15. The feed unit 13, the transfer unit 14, and the discharge unit 15 are installed in the base shell 12 from right to left. The feed unit 13 is connected to the bottom of the primary digester 2, and the sewage enters the primary digester 2 from the feed unit 13. The transfer unit 14 connects the primary digester 2 and the secondary digester 3. The transfer unit 14 sucks the reacted sludge in the primary digester 2 into the secondary digester 3 to continue the reaction using the waste heat. The discharge unit 15 is connected to the bottom of the secondary digester 3, and the sludge in the secondary digester 3 is transferred to the designated area through the discharge unit 15 after the reaction is completed.

During operation, the sewage to be treated enters the primary digestion furnace 2 from the feeding unit 13. After 7-12 days of vigorous digestion reaction in the primary digestion furnace 2, the transfer unit 14 sucks the sludge in the primary digestion furnace 2 into the secondary digestion furnace 3 to continue the reaction using the waste heat. After the sludge reaction in the secondary digestion furnace 3 is completed, it is transferred to the designated area through the discharging unit 15. The pH sensing module 11 (which includes a pH sensor in the prior art, and the pH sensor is used to detect the hydrogen ion concentration in the object to be measured and convert it into a corresponding usable output signal) monitors the pH value of the sewage. When the pH value is abnormal, the personnel are reminded to add chemical additives to the primary digestion furnace 2 to adjust the pH value to an appropriate state.

As shown in Figure 6, during the digestion reaction, additives are usually required to be added to adjust the pH value or increase the gas production rate. In order to perform the addition more evenly, the present application is provided with a delivery module 4, which includes a connecting block 41, a storage unit 42, a partition plate 43, a feed trough 411, an injection cabin 412, a sliding column 44, a push plate 45, a delivery electric pusher 46, and an injection mechanism 47. The connecting block 41 is installed on the side wall of the primary digestion furnace 2. A connecting groove is provided inside the connecting block 41 to communicate with the interior of the primary digestion furnace 2. The storage unit 42 is installed on the front right side of the base shell 12. Additives are stored in the storage unit 42, including chemical additives and biological additives. Chemical additives are used to adjust the acid-base balance in the digestion reaction. Biological additives contain specific types of anaerobic bacteria or enzymes and other nutrients that promote the growth of microorganisms. Biological additives are used to enhance the biodegradation efficiency during anaerobic digestion, such as in the start-up stage of the digester, when the digestion efficiency decreases or when it is desired to increase When the gas production is high, the above purpose can be achieved by adding biological additives. The storage unit 42 is connected to the connecting groove through the conveying pipe 421. The partition plate 43 is slidable left and right in the middle of the connecting groove. The partition plate 43 divides the connecting groove into an upper feed groove 411 and a lower injection cabin 412. In the initial state, the feed groove 411 and the injection cabin 412 are connected. When adding, the partition plate 43 separates the feed groove 411 and the injection cabin 412, so that only the additives inside the injection cabin 412 are added to the primary digestion furnace 2, thereby realizing the quantitative addition of additives. The sliding column 44 is slidable left and right inside the partition plate 43. A spring is connected between the sliding column 44 and the partition plate 43. The spring acts as a support and reset. The end of the sliding column 44 away from the partition plate 43 is installed on the push plate 45, and the push plate 45 is installed on the output end of the delivery electric pusher 46. The delivery electric pusher 46 is installed on the base shell 12 through the motor seat, and the injection mechanism 47 is arranged in the injection cabin 412.

6, the injection mechanism 47 includes a boost plate 471, an air pressure balance chamber 413, a connecting pipe 414, an L-shaped push rod 472, a propulsion block 473, a block 474, an unlocking groove 475, a layered plate 476, a plug 1 477, and a plug 2 478. The boost plate 471 is slidably arranged in the injection cabin 412, and an air pressure balance chamber 413 connected to the injection cabin 412 is provided inside the connecting block 41. The air pressure balance chamber 413 is located on the outside of the boost plate 471. The air pressure balance chamber 413 is connected to the inside of the primary digestion furnace 2 through the connecting pipe 414. The inside of the connecting pipe 414 is provided with a filtering structure of the prior art, so as to prevent solid impurities from entering the air pressure balance chamber 413. A spring 2 is connected between the pressure plate 471 and the air pressure balance chamber 413, and the spring 2 plays a reset role. An L-shaped push rod 472 is slidably arranged inside the air pressure balance chamber 413, and an elastic seal is connected between the L-shaped push rod 472 and the air pressure balance chamber 413. The lower end of the L-shaped push rod 472 is connected to the booster plate 471, and the push block 473 is installed at the lower end of the push plate 45. The position between the push block 473 and the L-shaped push rod 472 corresponds to that between the push block 473 and the L-shaped push rod 472. The card block 474 is slidably arranged in the injection cabin 412 up and down, and a spring 3 is connected between the card block 474 and the injection cabin 412. The spring 3 always keeps the card block 474 pushing upward. The upper end of the booster plate 471 is provided with a position corresponding to the lower end of the card block 474. The corresponding card slot is set, and the card block 474 in the initial state is inserted into the card slot to lock the position of the supercharging plate 471. The lower end of the partition plate 43 is provided with an unlocking slot 475 corresponding to the upper end position of the card block 474. The unlocking slot 475 and the card block 474 in the initial state are in a misaligned state. When the unlocking slot 475 moves to just above the card block 474, under the action of spring three, the card block 474 moves upward and is inserted into the unlocking slot 475, thereby unlocking the position of the supercharging plate 471, and the unlocking slot 475 is trapezoidal. When the partition plate 43 is reset, the card block 474 is squeezed between the hypotenuse of the unlocking slot 475, so as not to hinder the partition plate 43 from being reset, and at the same time, the card block 474 is squeezed and reset A layered plate 476 is installed at the inner end of the injection cabin 412. The layered plate 476 divides the inner end of the injection cabin 412 into two lower injection channels. A plug 477 is provided in the upper injection channel for sliding left and right. A spring 4 is connected between the plug 477 and the upper injection channel. The spring 4 plays a resetting role. A T-shaped through groove is provided inside the plug 477. When the additive is sprayed out from the inside of the plug 477, the T-shaped through groove makes the additive spray out in the form of an up-and-down spray inside the first-stage digestion furnace 2, thereby accelerating the diffusion of the additive in the up-and-down direction. A plug 2 478 is provided in the lower injection channel for sliding left and right. The plug 2 478 is connected to the booster plate 471 through a connecting rod.

In the actual process of injection feeding, the electric pusher 46 pushes the push plate 45 to move, and the partition plate 43 is pushed to separate the feed slot 411 and the injection cabin 412. At this time, when the unlocking slot 475 moves to just above the card block 474, under the action of spring three, the card block 474 moves upward and is inserted into the unlocking slot 475, thereby unlocking the position of the booster plate 471. At the same time, the push block 473 is in contact with the L-shaped push rod 472 but no squeezing occurs. Afterwards, the electric pusher 46 continues to push the push plate 45, and the sliding column 44 and the partition plate 43 slide relative to each other. The sliding column 44 triggers the unlocking component 779. At the same time, the push block 473 pushes the L-shaped push rod 472 to move. The booster plate 471 is pushed, the internal pressure of the injection cabin 412 increases, and the plug 477 is pushed out of the upper injection channel under pressure, and the T-shaped through groove inside the plug 477 is exposed to the inside of the first-stage digester 2. The additives inside the injection cabin 412 are sprayed out in the up and down directions inside the first-stage digester 2 along the T-shaped through groove under pressure, so that the additives can be diffused in the up and down directions as much as possible. Afterwards, the plug 478 is pushed out of the injection channel below, and the remaining additives inside the injection cabin 412 enter the first-stage digester 2 from the injection channel below. At the same time, the enhancement module 9 is triggered, and the stirring module 7 is expanded and deformed, so that the additives can diffuse evenly from the outer periphery of the first-stage digester 2 to the inside.

3 and 4, during the digestion reaction, stirring can improve the reaction efficiency. For this purpose, the present application is provided with a stirring module 7, which includes a stirring frame, an expansion mechanism 1 76, and a locking mechanism 77. The stirring frame is composed of a stirring member 1 71, a stirring member 2 72, a stirring member 3 73, a stirring member 4 74, and a stirring member 5 75. The stirring frame in the initial state is in a contracted state (energy-saving station) to stir the sewage at a low speed and uniform speed. When the additive is added, the stirring frame expands and expands (enhanced station) to stir the sewage at a high speed (high speed is the conclusion drawn compared to low-speed stirring, which only increases a certain speed relative to low-speed stirring) and uniform speed. The stirring member 1 71 is fixedly mounted on the periphery of the stirring shaft 6, stirring member 2 72 is slidably arranged on stirring member 1 71 left and right, stirring member 3 73 is slidably arranged on the upper end of stirring member 2 72 up and down, stirring member 4 74 is slidably arranged on the lower end of stirring member 2 72 up and down, stirring member 4 74 is slidably matched with stirring member 5 75, stirring member 5 75 is slidably arranged on the periphery of the stirring shaft 6 up and down, extension mechanism 1 76 links stirring member 2 72 and stirring member 4 74, extension mechanism 2 links stirring member 2 72 and stirring member 3 73, extension mechanism 2 has the same structure as extension mechanism 1 76, locking mechanism 77 locks the position between stirring member 1 71 and stirring member 2 72.

During the actual stirring process, the stirring motor 5 drives the stirring shaft 6 to rotate, and the stirring frame rotates with the stirring shaft 6, thereby stirring the sewage. At this time, the stirring module 7 is in the energy-saving position, the pH value and other environmental factors inside the primary digestion furnace 2 are in a normal state, the number of anaerobic bacteria is also at an appropriate value, and the reaction proceeds stably.

5, when adding additives, in order to enhance the stirring effect and make the additives diffuse as quickly as possible, the present application is provided with an expansion mechanism 76, the expansion mechanism 76 includes a threaded column 761, a rotating gear 762, and a driving rack plate 763. The threaded column 761 is rotatably arranged on the stirring member 4 74, the stirring member 2 72 is provided with a threaded groove that is threadably matched with the threaded column 761, the rotating gear 762 is sleeved and installed on the bottom periphery of the threaded column 761, and the stirring member 5 75 is provided with a driving rack plate 763 that is meshed with the rotating gear 762. 3. When the stirring member 2 72 moves radially outward, a relative displacement occurs between the rotating gear 762 and the driving rack plate 763, the rotating gear 762 rotates, and the threaded column 761 rotates following the rotating gear 762, so that the stirring member 4 74 descends, and the stirring member 5 75 follows the stirring member 4 74 to descend. Similarly, under the action of the expansion mechanism 2, the stirring member 3 73 slides upward, so that the entire stirring frame is in an outwardly expanded state, and the contact area between the expanded stirring frame and the sewage is increased, thereby enhancing the stirring effect.

As shown in Figure 2, the connecting card plate 8 connects the stirring member three 73 and the stirring member four 74 in the adjacent stirring module 7. The connecting card plate 8 is installed at the bottom of the stirring member four 74 located above. The position of the connecting card plate 8 corresponds to the stirring member three 73. When the stirring frame is expanded and unfolded, the stirring member three 73 located below is inserted into the card slot formed by the connecting card plate 8 between the two adjacent stirring frames, so that the two adjacent stirring frames are clamped together to enhance the stability of the structure.

During the actual expansion process, the stirring member 2 72 moves toward the outer peripheral direction of the primary digester 2 under the push of the enhancement module 9, and a relative displacement occurs between the rotating gear 762 and the driving rack plate 763. The rotating gear 762 rotates, and the threaded column 761 follows the rotating gear 762 to rotate, thereby causing the stirring member 4 74 to descend, and the stirring member 5 75 follows the stirring member 4 74 to descend. Similarly, under the action of the expansion mechanism 2, the stirring member 3 73 slides upward, thereby causing the entire stirring frame to be in an outwardly expanded state, and when the stirring frame is expanded and unfolded, the stirring member 3 73 located below between the two adjacent stirring frames is inserted into the card slot formed by the connecting card plate 8, thereby connecting the two adjacent stirring frames, thereby enhancing the stability of the structure, increasing the contact area between the expanded stirring frame and the sewage, and enhancing the stirring effect.

4 , in order to lock the retracted state of the stirring frame, the present application is provided with a locking mechanism 77, which includes a locking plate 771, a locking groove 772, a locking block 773, a locking pin 774, a sliding wedge 1 775, a receiving groove 776, a sliding wedge 2 777, a sliding wedge 3 778, and an unlocking assembly 779. The locking plate 771 is mounted on the outer end of the driving rack plate 763, and a locking groove 772 is provided at the lower end of the locking plate 771. A locking block 773 is provided in the locking groove 772 for sliding up and down movement. A spring 5 is connected between the locking block 773 and the locking groove 772, and the spring 5 plays a resetting role. The locking pin 774 is provided in the stirring member 2 72 for sliding up and down movement. The locking pin 774 is connected to the stirring member 2 A spring 6 is connected between 72, and the spring 6 always keeps the locking pin 774 pushing downward. The position between the locking pin 774 and the locking groove 772 corresponds. The locking pin 774 in the initial state is inserted into the locking groove 772 to lock the position between the driving rack plate 763 and the stirring member 2 72 (at this time, the stirring frame cannot be expanded). The sliding wedge 1 775 is slidably arranged in the stirring member 2 72, and the sliding wedge 1 775 is provided with a receiving groove 776 corresponding to the position of the locking pin 774. The sliding wedge 2 777 is slidably arranged in the stirring member 2 72 up and down. The sliding wedge 2 777 and the sliding wedge 1 775 are extruded and matched. The sliding wedge 3 778 is slidably arranged in the stirring member 2 72. When the locking pin 774 is in the unlocked position, the sliding wedge 775 is in the unlocked position, and the locking pin 774 is in the unlocked position, so that the locking pin 774 is locked. The movable wedge three 778 contacts the inner wall of the first-stage digestion furnace 2 and is squeezed and reset. Under the action of the sliding wedge two 777, the sliding wedge one 775 is squeezed and reset, and the locking pin 774 is squeezed and moved upward to reset. Since the stirring frame is in the maximum expansion state at this time, the upward moving locking pin 774 does not contact the driving rack plate 763. When the stirring frame contracts later, the driving rack plate 763 and the locking pin 774 gradually approach each other, and the locking pin 774 contacts and squeezes the locking block 773. The locking block 773 is squeezed and moved upward, so that the locking pin 774 smoothly crosses the locking block 773 and enters the locking groove 772, thereby re-locking the position between the driving rack plate 763 and the stirring member two 72.

In the process of actually locking the contracted state of the stirring frame, when the unlocking component 779 triggers the sliding wedge 1 775 to move so that the position between the receiving groove 776 and the locking pin 774 corresponds, under the action of spring 6, the locking pin 774 moves downward and is inserted into the receiving groove 776 and disengages from the locking groove 772, driving the position between the rack plate 763 and the stirring member 2 72 to unlock (the stirring frame can be expanded and unfolded at this time). At the same time, the moving sliding wedge 1 775 squeezes the sliding wedge 3 778 outward through the sliding wedge 2 777. When the stirring frame is expanded and unfolded to the maximum, the sliding wedge 3 778 contacts and is squeezed against the inner wall of the first-stage digestion furnace 2. Reset. Under the action of sliding wedge 2 777, sliding wedge 1 775 is squeezed and reset, and locking pin 774 is squeezed and moved upward to reset. Since the stirring frame is in the maximum expansion state at this time, the upward moving locking pin 774 does not contact the driving rack plate 763. When the stirring frame contracts later, the driving rack plate 763 and the locking pin 774 gradually approach each other, and the locking pin 774 contacts and squeezes the locking block 773. The locking block 773 is squeezed and moved upward, so that the locking pin 774 smoothly crosses the locking block 773 and enters the locking groove 772, thereby re-locking the position between the driving rack plate 763 and the stirring member 2 72.

7 and 8, the present application is provided with an unlocking assembly 779 to unlock the locking mechanism 77, and the unlocking assembly 779 includes an unlocking plate 780, a bevel gear 1 781, a bevel gear 2 782, a rotating rod 783, an extrusion block 784, an elastic rod 785, and an extrusion layer 786. The unlocking plate 780 is rotatably arranged on the side wall of the connecting block 41 located inside the primary digestion furnace 2 through a pin shaft. In the initial state, the unlocking plate 780 is parallel to the side wall of the connecting block 41. At this time, the unlocking plate 780 closes the injection channel. When the unlocking plate 780 is rotated 90 degrees, the unlocking plate 780 unlocks the locking mechanism 77, and then the unlocking plate 780 is rotated 90 degrees again to fit parallel to the side wall of the connecting block 41, so as to avoid the stirring frame unfolded after unlocking. An avoidance groove is provided in the middle of the top of the unlocking plate 780, and a bevel gear 1 781 is installed in the avoidance groove. The bevel gear 2 782 is installed at the end of the rotating rod 783, and the bevel gear 2 782 is meshed with the bevel gear 1 781. The rotating rod 783 is rotatably set on the connecting block 41, and the rotating rod 783 A spring 7 is connected to the connecting block 41. The spring 7 is a torque spring. The spring 7 plays a reset role. Two extrusion blocks 784 are arranged alternately on the outer circumference of the rotating rod 783. The extrusion blocks 784 are arranged 90 degrees apart in the circumferential direction of the rotating rod 783. The extrusion layers 786 are sequentially extruded with the extrusion blocks 784, so that the rotating rod 783 rotates 180 degrees. Under the meshing action of the bevel gear 1 781 and the bevel gear 2 782, the unlocking plate 780 rotates 180 degrees (in two rotations, a single rotation of 90 degrees). 83 is rotatably arranged in the connecting block 41. Compared with the sliding connection, this design ensures the sealing. The elastic rod 785 is slidably arranged inside the connecting block 41. The elastic rod 785 is an elastic and retractable structure. A spring eight is connected between the elastic rod 785 and the connecting block 41. The spring eight plays a reset role. One end of the elastic rod 785 corresponds to the position between the sliding column 44. The other end of the elastic rod 785 is provided with a blind hole groove. The interior of the blind hole groove is installed with an extrusion layer 786. The extrusion layer 786 and the extrusion block 784 are extrusion-fitted.

When unlocking is actually performed, the sliding column 44 pushes the elastic rod 785 to move, the squeezing layer 786 is squeezed with the first squeezing block 784, the rotating rod 783 is rotated 90 degrees, and the unlocking plate 780 is rotated 90 degrees under the meshing action of the bevel gear 1 781 and the bevel gear 2 782. At this time, on the one hand, the unlocking plate 780 no longer closes the injection channel, and the additive can be smoothly injected into the primary digestion furnace 2. On the other hand, the unlocking plate 780 and the sliding wedge 1 775 are squeezed to unlock the locking mechanism 77. After that, the squeezing layer 786 and the second squeezing block 784 are squeezed. 84 is squeezed, and the rotating rod 783 rotates ninety degrees again, so that the unlocking plate 780 rotates ninety degrees again. At this time, the unlocking plate 780 and the side wall of the connecting block 41 are in a parallel fit state. After the locking mechanism 77 is unlocked, the stirring frame expands and unfolds, and the unfolded stirring frame collides with the unlocking plate 780 when in contact (at this time, the unlocking plate 780 protrudes less relative to the side wall of the connecting block 41, and the collision is relatively stable, reducing the risk of damage). Since the spiral rod 92 is an elastic and retractable structure, the stirring frame shrinks and trembles slightly, which is conducive to the diffusion of the additive.

As shown in Figure 3, the enhancement module 9 includes a pushing unit 91, a screw rod 92, a cam member 93, a vibration plate 94, and a wave plate 95. The pushing unit 91 is installed on the stirring shaft 6. An auxiliary member is installed on the output end of the pushing unit 91. The auxiliary member is provided with a screw rod 92 which is rotatably arranged by an electric turntable. The other end of the screw rod 92 is rotatably arranged on the stirring member 72. The screw rod 92 is an elastic and retractable structure. The spiral amplitude on the outer side of the screw rod 92 is greater than the spiral amplitude on the inner side. When the screw rod 92 rotates, the large spiral on the outer side of the screw rod 92 quickly stirs and transports the additives on the outer periphery of the primary digester 2 to the inside. After transporting a certain distance, the large spiral on the outer side of the screw rod 92 becomes a small spiral. At this time, the screw rod 92 still stirs and transports the additives to the inside, but in a smaller amount and more evenly. In order to avoid the situation where too much additive accumulates in the middle, the cam member 93 is installed at the end of the spiral rod 92 away from the stirring shaft 6, and the vibration plate 94 is set in the stirring member 72 for sliding up and down. A spring nine is connected between the vibration plate 94 and the stirring member 72, and the spring nine plays a supporting and resetting role. The position of the vibration plate 94 corresponds to that of the cam member 93. Wave plates 95 are installed on both sides of the lower end of the vibration plate 94. When the cam member 93 rotates, it continuously hits the vibration plate 94 to vibrate, and the wave plate 95 vibrates up and down with the vibration plate 94, thereby accelerating the diffusion of the additive in the up and down directions. The trigger switch 96 is installed on the side wall of the first-level digestion furnace 2, and the trigger switch 96 is electrically connected to the pushing unit 91. A trigger pressure member 97 corresponding to the position of the trigger switch 96 is installed in the middle of the pushing plate 45.

In the process of actually enhancing the stirring effect, the pushing plate 45 pushes the trigger pressure piece 97 to squeeze the trigger switch 96 so that the pushing unit 91 is triggered, and the pushing unit 91 pushes the screw rod 92 to move outward, thereby pushing the stirring piece 2 72 to move outward, and the stirring frame expands and unfolds. At the same time, the electric turntable drives the screw rod 92 to rotate, and the large spiral on the outside of the screw rod 92 quickly stirs and transports the additives on the periphery of the primary digestion furnace 2 to the inside. After transporting a certain distance, the large spiral on the outside of the screw rod 92 becomes a small spiral. At this time, the screw rod 92 still stirs and transports the additives to the inside, but in a smaller and more uniform amount, thereby avoiding the situation where the additives accumulate too much in the middle. At the same time, the cam piece 93 rotates with the screw rod 92. When the cam piece 93 rotates, it continuously hits the vibration plate 94 to make it vibrate, and the wave plate 95 vibrates up and down with the vibration plate 94, thereby accelerating the diffusion of the additives in the up and down directions.

The implementation principle of this embodiment is:

Step 1: The sewage is discharged into the primary digestion furnace 2, and the stirring module 7 in the energy-saving position stirs the sewage;

Step 2: When it is necessary to add additives to adjust the pH value or gas production value, the additives are added to the primary digestion furnace 2 at multiple positions and directions through the delivery module 4;

Step 3: The delivery module 4 triggers the enhancement module 9, which accelerates the diffusion of the additive by stirring and vibrating in all directions. At the same time, the enhancement module 9 triggers the stirring module 7 to expand and expand. The stirring effect of the expanded stirring module 7 is enhanced. At the same time, the expanded stirring module 7 scrapes the inner wall of the primary digestion furnace 2 to prevent sludge from adhering.

Step 4: After the additives are evenly stirred, each module is reset;

Step 5: After a specified time, the sludge inside the primary digestion furnace 2 is transferred to the secondary digestion furnace 3 for secondary digestion reaction;

Step 6: After the reaction is completed, the sludge inside the secondary digestion furnace 3 is discharged;

Step 7: During the whole process, the gas collection module 10 always collects the gas generated by the digestion reaction, and the pH sensing module 11 always monitors the pH value inside the primary digestion furnace 2.

The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims (4)

1. A self-circulating anaerobic digestion reactor for sewage treatment, comprising: A base (1) has a primary digestion furnace (2) and a secondary digestion furnace (3) disposed on its upper end in order from right to left; A delivery module (4) is evenly arranged on the outer wall of the primary digestion furnace (2), and the delivery module (4) delivers additives into the primary digestion furnace (2) by multiple and multi-point spraying to increase the reaction speed and maintain a stable reaction environment; A stirring motor (5) is installed in the base (1), and a stirring shaft (6) is connected to the output end of the stirring motor (5). The stirring shaft (6) is rotatably arranged inside the primary digestion furnace (2); The stirring modules (7) are arranged on the stirring shaft (6) in sequence from top to bottom, and adjacent stirring modules (7) are matched with each other via connecting clamps (8). The stirring modules (7) with deformation function have an energy-saving position and a high-efficiency position during operation; An enhancement module (9) is arranged on the stirring module (7), and the enhancement module (9) enhances the stirring effect of the stirring module (7) to make the stirring more uniform; A gas collection module (10), the lower end of which is respectively connected to the top of the primary digestion furnace (2) and the top of the secondary digestion furnace (3), and the gas collection module (10) collects the gas generated during the reaction process; A pH sensing module (11) is arranged in the middle of the stirring shaft (6), and the pH sensing module (11) monitors the pH value inside the primary digestion furnace (2); The base (1) comprises: A base shell (12) is provided with a feed unit (13), a transfer unit (14), and a discharge unit (15) in order from right to left. The feed unit (13) is connected to the bottom of the primary digestion furnace (2). The transfer unit (14) connects the primary digestion furnace (2) and the secondary digestion furnace (3). The discharge unit (15) is connected to the bottom of the secondary digestion furnace (3). The delivery module (4) comprises: A connecting block (41) is mounted on the side wall of the primary digestion furnace (2), and a connecting groove is provided inside the connecting block (41) so as to communicate with the interior of the primary digestion furnace (2); A storage unit (42) is installed on the right side of the front end of the base housing (12), and the storage unit (42) is connected to the communication groove through a delivery pipe (421); A partition plate (43) is slidably disposed in the middle of the connecting groove, and the partition plate (43) divides the connecting groove into an upper feed groove (411) and a lower injection chamber (412); A sliding column (44) is arranged inside the partition plate (43) for sliding left and right movement. A spring is connected between the sliding column (44) and the partition plate (43). One end of the sliding column (44) away from the partition plate (43) is mounted on a push plate (45). The push plate (45) is mounted on the output end of the delivery electric pusher (46). The delivery electric pusher (46) is mounted on the base housing (12) through a motor seat. An injection mechanism (47) disposed in the injection chamber (412); The stirring module (7) comprises: The stirring frame is composed of a stirring member 1 (71), a stirring member 2 (72), a stirring member 3 (73), a stirring member 4 (74), and a stirring member 5 (75). The stirring member 1 (71) is fixedly mounted on the outer periphery of the stirring shaft (6). The stirring member 2 (72) is slidably arranged on the stirring member 1 (71) to the left and right. The stirring member 3 (73) is slidably arranged on the upper end of the stirring member 2 (72). The stirring member 4 (74) is slidably arranged on the lower end of the stirring member 2 (72). The stirring member 4 (74) and the stirring member 5 (75) are slidably matched. The stirring member 5 (75) is slidably arranged on the outer periphery of the stirring shaft (6) to the left and right. An expansion mechanism 1 (76) which links the stirring member 2 (72) and the stirring member 4 (74); Extension mechanism 2, which links stirring member 2 (72) and stirring member 3 (73), and the structure of extension mechanism 2 is the same as that of extension mechanism 1 (76); A locking mechanism (77) for locking the position between the stirring member 1 (71) and the stirring member 2 (72); The expansion mechanism 1 (76) comprises: A threaded column (761) is rotatably mounted on the stirring member 4 (74), and a threaded groove is formed on the stirring member 2 (72) to be threadedly matched with the threaded column (761); A rotating gear (762) is sleeved and mounted on the outer periphery of the bottom of the threaded column (761), and a driving rack plate (763) meshing with the rotating gear (762) is mounted on the stirring member (75); The locking mechanism (77) comprises: A locking plate (771) is mounted on the outer end of the driving rack plate (763), a locking groove (772) is provided at the lower end of the locking plate (771), a locking block (773) is provided in the locking groove (772) to slide up and down, and a spring (5) is connected between the locking block (773) and the locking groove (772); A locking pin (774) is slidably disposed in the stirring member (72) up and down, a spring (6) is connected between the locking pin (774) and the stirring member (72), and the positions of the locking pin (774) and the locking groove (772) correspond to each other; A sliding wedge (775) is slidably disposed in the stirring member (72) to the left and right, and a receiving groove (776) corresponding to the position of the locking pin (774) is provided on the sliding wedge (775); The second sliding wedge (777) is slidably disposed in the second stirring member (72) up and down, and the second sliding wedge (777) and the first sliding wedge (775) are extrusion-fitted; A sliding wedge (778) is slidably disposed in the stirring member (72) so as to slide left and right, and the sliding wedge (778) and the sliding wedge (777) are extrusion-fitted with each other; An unlocking assembly (779) disposed on the inner wall of the primary digestion furnace (2); The unlocking assembly (779) comprises: An unlocking plate (780) is rotatably arranged on the side wall of the connecting block (41) located inside the primary digestion furnace (2) via a pin shaft, and an escape groove is provided in the middle of the top end of the unlocking plate (780), and a bevel gear 1 (781) is installed in the escape groove; A second bevel gear (782) is mounted on the end of a rotating rod (783), the second bevel gear (782) is meshed with the first bevel gear (781), the rotating rod (783) is rotatably mounted on the connecting block (41), a spring (7) is connected between the rotating rod (783) and the connecting block (41), and two extrusion blocks (784) are alternately arranged on the outer periphery of the rotating rod (783); The elastic rod (785) is slidably arranged inside the connecting block (41) to the left and right. The elastic rod (785) is an elastic and retractable structure. A spring 8 is connected between the elastic rod (785) and the connecting block (41). One end of the elastic rod (785) corresponds to the position between the sliding column (44). The other end of the elastic rod (785) is provided with a blind hole groove. An extrusion layer (786) is installed inside the blind hole groove. The extrusion layer (786) and the extrusion block (784) are extrusion-fitted. 2. A sewage treatment self-circulating anaerobic digestion reactor according to claim 1, characterized in that the injection mechanism (47) comprises: A boost plate (471) is slidably disposed in the injection chamber (412) to the left and right. An air pressure balance chamber (413) communicating with the injection chamber (412) is provided inside the connection block (41). The air pressure balance chamber (413) is located outside the boost plate (471). The air pressure balance chamber (413) is communicated with the interior of the primary digestion furnace (2) through a connecting pipe (414). A second spring is connected between the boost plate (471) and the air pressure balance chamber (413). An L-shaped push rod (472) is slidably disposed inside the air pressure balance chamber (413) to the left and right, an elastic sealing member is connected between the L-shaped push rod (472) and the air pressure balance chamber (413), and a lower end of the L-shaped push rod (472) is connected to the boost plate (471); A push block (473) is mounted on the lower end of the push plate (45), and the position of the push block (473) corresponds to that of the L-shaped push rod (472); A card block (474) is slidably disposed in the injection chamber (412) up and down, a spring three is connected between the card block (474) and the injection chamber (412), a card slot corresponding to the lower end position of the card block (474) is formed at the upper end of the booster plate (471), and an unlocking slot (475) corresponding to the upper end position of the card block (474) is formed at the lower end of the partition plate (43); A layered plate (476) is installed at the inner end of the injection chamber (412). The layered plate (476) divides the inner end of the injection chamber (412) into two lower injection channels. A plug (477) is provided in the upper injection channel to slide left and right. A spring four is connected between the plug (477) and the upper injection channel. A T-shaped through groove is provided inside the plug (477). A plug (478) is provided in the lower injection channel to slide left and right. The plug (478) is connected to the boost plate (471) through a connecting rod. 3. The sewage treatment self-circulating anaerobic digestion reactor according to claim 1, characterized in that the enhancement module (9) comprises: A pushing unit (91) is mounted on the stirring shaft (6). An auxiliary component is mounted on the output end of the pushing unit (91). A screw rod (92) is arranged on the auxiliary component to rotate via an electric turntable. The other end of the screw rod (92) is rotatably arranged on the stirring member 2 (72). The screw rod (92) is an elastic and retractable structure. The spiral amplitude of the outer side of the screw rod (92) is greater than the spiral amplitude of the inner side. A cam member (93) mounted on an end of the screw rod (92) away from the stirring shaft (6); A vibration plate (94) is slidably disposed in the stirring member (72) up and down, a spring (9) is connected between the vibration plate (94) and the stirring member (72), the vibration plate (94) corresponds to the position of the cam member (93), and wave plates (95) are installed on both sides of the lower end of the vibration plate (94); A trigger switch (96) is installed on the side wall of the primary digestion furnace (2). The trigger switch (96) is electrically connected to the pushing unit (91). A trigger pressure piece (97) corresponding to the position of the trigger switch (96) is installed in the middle of the pushing plate (45). 4. A sewage treatment self-circulating anaerobic digestion reactor according to claim 1, characterized in that the connecting card plate (8) connects the stirring member three (73) and the stirring member four (74) in the adjacent stirring modules (7), and the connecting card plate (8) is installed at the bottom of the stirring member four (74) located above, and the position of the connecting card plate (8) corresponds to the stirring member three (73).