Anaerobic acidification device for kitchen waste suitable for engineering applications

Abstract

The application discloses an anaerobic acid-producing device for kitchen garbage suitable for engineering application and relates to the technical field of garbage treatment. The anaerobic acid-producing device for kitchen garbage suitable for engineering application comprises a rigid pressure-bearing outer cylinder, a feeding port, a multi-parameter sensor integrated seat, a feeding pipe, a conical bulk material cap and a residue discharge screw conveyor, and the inside of the rigid pressure-bearing outer cylinder is provided with a flexible shearing assembly and a capsule driving assembly. The flexible shearing assembly and the capsule driving assembly are matched to facilitate continuous rubbing, dispersing and forward dredging of the heterogeneous impurities mixed in the kitchen garbage, avoid the accumulation of the impurities on the inner wall of the feeding tank, eliminate the risk of feeding interruption and feeding quantity fluctuation, adapt to the working condition requirements of engineering 24-hour continuous feeding, continuously scatter the high solid content materials in groups, improve the contact efficiency of the organic matter in the kitchen garbage and acid-producing bacteria, and further improve the treatment efficiency of anaerobic acid production.

Description

Technical Field

[0001] This invention relates to the field of waste treatment technology, and in particular to an anaerobic acid-producing device for kitchen waste suitable for engineering applications. Background Technology

[0002] Kitchen waste refers to easily perishable household waste containing organic matter generated from daily life, food processing, catering services, and institutional catering. Currently, the annual output of kitchen waste exceeds 120 million tons. It is characterized by high water content, high organic matter content, easy perishability and odor, and complex impurity composition. Traditional treatment methods such as landfill, incineration, and aerobic composting suffer from prominent problems such as groundwater pollution, insufficient calorific value, odor nuisance, and low resource utilization rate. Anaerobic hydrolysis acidification technology is one of the core processes for the harmless and resource-based treatment of kitchen waste. It can efficiently convert the organic matter in kitchen waste into high-value-added volatile fatty acids (VFAs). The products can be widely used in fields such as biological nitrogen and phosphorus removal, biodegradable plastic synthesis, and biofuel production, possessing both environmental benefits and economic value. Among these, the anaerobic acidification device is the core carrier for the engineering implementation of this technology.

[0003] According to the search, a Chinese patent provides a double-barrel horizontal organic waste acidification and fermentation treatment machine, with publication number CN2815532Y. It includes an acidification tank and an anaerobic fermentation tank connected to the acidification tank. The feature is that both the acidification tank and the anaerobic fermentation tank are conical, and each is equipped with a main shaft. The main shaft is equipped with a screw propeller and a stirrer.

[0004] The aforementioned device employs a two-stage anaerobic fermentation process, with acidification and fermentation carried out in separate tanks. It boasts a fast processing rate and excellent treatment effect, while also being compact and easy to operate. It can be used for the ecological treatment of urban organic household waste, and is particularly suitable for the ecological treatment of organic waste from large and small catering establishments. It provides an effective treatment approach and method for solving the problem of difficult food waste disposal in the catering industry. It can produce clean energy methane, achieves a high degree of waste reduction, and the final compost produced has high nitrogen, phosphorus, and potassium content.

[0005] However, with a rigid tank structure, under continuous 24-hour feeding conditions, heterogeneous impurities such as plastics, fibers, and bones mixed in with kitchen waste tend to accumulate at the conveying port, leading to a reduction in the effective cross-sectional area of ​​the feeding channel, causing feeding interruptions or fluctuations in the feeding volume. Furthermore, when processing kitchen waste with high solids content, the rigid cavity of the steel tank cannot actively change the internal flow field morphology. Under the action of stirring, the material preferentially forms an inertial flow along the direction of rotation of the stirrer, while the flow velocity in the corner areas of the tank and the interlayer areas of the material approaches zero. The internal material is prone to channeling. At this time, the fluid only flows along the path with the least resistance, resulting in a reaction dead zone volume as high as 20% to 30%, which affects the processing efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide an anaerobic acid-producing device for kitchen waste suitable for engineering applications, in order to solve the problems mentioned in the background art above: To achieve the above objectives, the present invention provides the following technical solution: An anaerobic acid-producing device for kitchen waste suitable for engineering applications includes a rigid pressure-bearing outer cylinder, a feed inlet, a multi-parameter sensor integrated base, a conveying pipe, a conical bulking cap, and a slag discharge screw conveyor. The rigid pressure-bearing outer cylinder is internally equipped with a flexible shearing component and a bladder driving component. The flexible shearing assembly includes a flexible pressure-bearing inner liner body, an mounting ring plate, several flexible thin-film pressure sensors, and axial guide ribs. An inner liner upper edge pressure plate, matching the mounting ring plate, is fixedly connected to the upper outer ring of the flexible pressure-bearing inner liner body. The outer ring of the mounting ring plate is fixedly connected to the upper inner wall of the rigid pressure-bearing outer cylinder. The flexible pressure-bearing inner liner body is fixed inside the rigid pressure-bearing outer cylinder by the inner liner upper edge pressure plate and the mounting ring plate. Several annular corrugated ribs are integrally formed on the inner wall of the flexible pressure-bearing inner liner body. Several corrugated rib grooves matching the annular corrugated ribs are formed on the outer ring of the flexible pressure-bearing inner liner body. A fabric reinforcement layer and several sets of equidistantly arranged flexible thin-film pressure sensors are embedded inside the flexible pressure-bearing inner liner body. The bladder driving assembly includes several cavity support plates, through-wall pipes, and flexible corrugated pipes. Several cavity support plates are fixedly installed on the inner wall of the rigid pressure-bearing outer cylinder. Through slots that adapt to the flexible pressure-bearing inner liner body are opened at the center of the upper and lower ends of the cavity support plates. Several bladder back plates are slidably installed on the top surface of the cavity support plates and around the flexible pressure-bearing inner liner body. Flexible bladders are installed on the side of the bladder back plates facing the flexible pressure-bearing inner liner body. Adjusting screws are rotatably installed on the side of the bladder back plates away from the flexible bladders. Several annular distribution pipes that adapt to the flexible bladders are arranged around the outer ring of the rigid pressure-bearing outer cylinder. The upper air inlets of several flexible bladders are connected to the delivery ports of the annular distribution pipes through the flexible corrugated pipes and through-wall pipes. An electromagnetic quick-cut valve is provided at the connection between each through-wall pipe and the annular distribution pipe.

[0007] Preferably, the end of the adjusting screw away from the back plate of the bladder is provided with a telescopic cavity, and an anti-rotation telescopic rod is slidably installed inside the telescopic cavity. The adjusting screw is connected to an adjusting handwheel or a servo motor through the anti-rotation telescopic rod and a detachable bolt.

[0008] By adopting the above technical solution, using a telescopic cavity in conjunction with an anti-rotation telescopic rod and detachable bolts, the front end of the adjusting screw can be replaced with an adjusting handwheel or a servo motor, and the length of the adjusting screw can be extended by the anti-rotation telescopic rod sliding in the telescopic cavity.

[0009] Preferably, the flexible pressure-bearing inner liner body is suspended and installed inside the rigid pressure-bearing outer cylinder. The upper part of the flexible pressure-bearing inner liner body is cylindrical and the lower part is inverted conical. Several annular pleated ribs are arranged at equal intervals along the axial direction of the flexible pressure-bearing inner liner body, and several axial guide ribs are arranged vertically and evenly along the inner wall of the flexible pressure-bearing inner liner body to restrict the circumferential rotation of the material.

[0010] By adopting the above technical solutions, the upper round and lower conical structure of the inner liner facilitates the sinking of materials due to gravity, the equidistant annular pleated ribs ensure uniform shearing, and the axial guide ribs effectively inhibit the material from rotating circumferentially with the inner liner, forcing the material to be pushed downward along the axial direction, reducing dead zones and improving the smoothness of slag discharge.

[0011] Preferably, the flexible pressure-bearing inner liner body, the annular corrugated ribs, and the axial guide ribs are all made of oil-resistant and wear-resistant butyl rubber composite material. The surface of the annular corrugated ribs is coated with a PTFE wear-resistant coating with a thickness of 0.3~0.5mm. The cross-section of several annular corrugated ribs is trapezoidal. Several annular corrugated ribs form a group. The position of each group of annular corrugated ribs is adapted to the flexible bladder body. The fold spacing of the annular corrugated ribs located on the upper part of the flexible pressure-bearing inner liner body is greater than the fold spacing of the lower part.

[0012] By adopting the above technical solution, butyl rubber composite material is used to be oil-resistant and wear-resistant, adapting to the high oil and high sand environment of kitchen waste. The PTFE coating reduces friction and adhesion. The pleated spacing design with a sparse upper part and a dense lower part allows the upper part to be mainly for drainage and the lower part to be mainly for strong shearing and grinding, thus optimizing the treatment effect of the annular pleated ribs at different heights.

[0013] Preferably, the outer end of the adjusting screw can be equipped with an adjusting handwheel for on-site manual fine-tuning, or replaced with a servo motor for remote automated precise forward and backward adjustment, so as to realize the position adjustment of the flexible capsule under different working conditions.

[0014] By adopting the above technical solution and replacing the adjustment handwheel or servo motor, it supports both manual fine-tuning and remote automated drive, so as to flexibly configure according to the project budget and automation requirements, reduce initial investment, and improve the convenience of operation and maintenance.

[0015] Preferably, an overflow pipe is connected to one side of each of the flexible bladders at a lower position, and an overpressure overflow valve is provided at the connection between the overflow pipe and the flexible bladder.

[0016] By adopting the above technical solution, overpressure protection of the flexible bladder can be achieved. The overpressure relief valve can automatically release pressure when the pressure inside the flexible bladder exceeds the standard, preventing damage to the flexible bladder, ensuring the safety of device operation, and avoiding shutdown failures caused by overpressure.

[0017] Preferably, a feed pipe is provided at the center of the top surface of the flexible pressure-bearing inner liner body. The lower end of the feed port extends into the interior of the rigid pressure-bearing outer cylinder and is connected to the top of the feed pipe through a conveying pipe. A conical material distribution cap is installed at the bottom of the feed pipe.

[0018] By adopting the above technical solution, during feeding, the conical material distribution cap disperses the material to the entire area of ​​the flexible pressure-bearing inner liner, avoiding local blockage caused by concentrated material accumulation. Combined with the concave and convex deformation of the flexible pressure-bearing inner liner, it further prevents bridging of impurities around the feed inlet, ensuring continuous feeding for 24 hours in an engineered manner.

[0019] Preferably, a gas collection hood is provided above the top of the flexible pressure-bearing inner liner body, and a main exhaust pipe is connected to the top of the gas collection hood. The top of the main exhaust pipe extends out of the top surface of the rigid pressure-bearing outer cylinder, and a lifting ring is provided at each corner of the top surface of the rigid pressure-bearing outer cylinder.

[0020] By adopting the above technical solution, acidification gas can be centrally collected and discharged, avoiding odor leakage, ensuring the stability of the anaerobic environment, and the lifting rings facilitate the overall hoisting of the device, reducing the difficulty of equipment installation and adapting to the needs of large-scale engineering installation.

[0021] Preferably, a slag discharge valve pipe is provided at the center of the bottom end of the rigid pressure-bearing outer cylinder, the bottom end of the flexible pressure-bearing inner liner is connected to the top end of the slag discharge valve pipe through a sealing flange, and the feeding port of the slag discharge screw conveyor is connected to the bottom end of the slag discharge valve pipe. The slag discharge screw conveyor is used to continuously and tightly discharge the residue.

[0022] By adopting the above technical solution, the residue can be discharged continuously in a closed manner, avoiding odor leakage and eliminating the need to stop the machine for tank cleaning. Combined with the inverted conical structure of the flexible pressure-bearing inner tank, the smoothness of residue discharge is improved, and the accumulation and blockage of residue are prevented.

[0023] Preferably, the multi-parameter sensor integrated base is installed on one side of the top surface of the annular corrugated rib. The multi-parameter sensor integrated base is provided with a sensor group for real-time monitoring of the process parameters of the flexible pressure-bearing inner liner. The sensor group includes an oxygen content sensor, a temperature sensor, a pH sensor, an ORP sensor, and a liquid level sensor.

[0024] By adopting the above technical solutions, real-time monitoring of all operating parameters can be achieved, accurately controlling the anaerobic environment, reaction temperature and material state, facilitating dynamic adjustment of operating conditions, ensuring stable acid production efficiency, and reducing the risk of reaction failure.

[0025] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting up a flexible shearing component and a capsule driving component in conjunction, allows for differentiated sequential pressurization of the array-installed flexible capsules during the processing of kitchen waste. This drives the flexible pressure-bearing inner liner to form a controllable concave-convex reciprocating deformation. The radial and circumferential shearing generated between the pressurized and non-pressurized areas by the annular pleated ribs facilitates continuous kneading, dispersion, and directional guidance of heterogeneous impurities mixed in the kitchen waste. This avoids the accumulation and bridging of impurities on the inner wall of the feeding tank, eliminates the risk of feeding interruption and feeding volume fluctuation, and is suitable for the engineering requirements of 24-hour continuous feeding.

[0026] 2. This invention, by implementing differentiated filling and discharging pressure on multiple array-type flexible capsules, can actively and dynamically change the flow field morphology inside the flexible pressure-bearing inner liner, breaking through the limitations of the fixed flow field of rigid tanks. It forces materials to form irregular turbulent circulation within the tank, preventing the fluid from forming a fixed low-resistance flow channel and eliminating channeling phenomena at the source. At the same time, it continuously breaks up clumps of high-solids-content materials, effectively eliminating the 20%-30% reaction dead zone of traditional rigid tanks, improving the contact efficiency between organic matter and acid-producing bacteria in kitchen waste, and thus improving the treatment efficiency of anaerobic acid production.

[0027] 3. This invention, through the coordinated operation of adjusting screws, adjusting handwheels, and servo motors, can finely adjust the initial distance between each flexible bladder and the flexible pressure-bearing inner liner according to actual working conditions. This eliminates dimensional deviations generated during tank processing and bladder installation, avoiding extrusion deformation failure and shear force imbalance caused by uneven local gaps. When the flexible bladder experiences elastic fatigue or relaxation deformation during long-term repeated pressurization and depressurization, the position of the flexible bladder can be adjusted to accurately compensate for the fatigue relaxation amount, eliminating the need for frequent replacement of new flexible bladders. Furthermore, the absence of rigid moving parts extending into the material cavity avoids common faults in traditional agitators such as fiber entanglement and impurity jamming, making it suitable for long-term unattended operation in engineering applications. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an anaerobic acid-producing device for kitchen waste suitable for engineering applications according to the present invention. Figure 2 This invention relates to an anaerobic acidification device for kitchen waste suitable for engineering applications. Figure 1 Enlarged view of area A; Figure 3 This is a schematic diagram of the structure of the conveying pipe, the main feeding pipe, the mounting ring plate, and the pressure plate on the upper edge of the inner liner in an anaerobic acid-producing device for kitchen waste suitable for engineering applications according to the present invention. Figure 4 This is a schematic diagram of the flexible pressure-bearing inner liner, annular pleated ribs, electromagnetic quick-cut valve, and annular distribution pipe in an anaerobic acid-producing device for kitchen waste suitable for engineering applications according to the present invention. Figure 5 This is a schematic diagram of the structure of the bladder back plate, the chamber support plate, and the adjusting screw in an anaerobic acid-producing device for kitchen waste suitable for engineering applications according to the present invention. Figure 6 This is a schematic diagram of the structure of the fabric reinforcement layer, the annular pleated ribs, and the flexible thin film pressure sensor in an anaerobic acid-producing device for kitchen waste suitable for engineering applications according to the present invention. Figure 7 This is a schematic diagram of the feed main pipe and conical bulk head in an anaerobic acid-producing device for kitchen waste suitable for engineering applications according to the present invention. Figure 8 This is a schematic diagram of the servo motor, axial guide rib, anti-rotation telescopic rod, and flexible thin-film pressure sensor in an anaerobic acid-producing device for kitchen waste suitable for engineering applications according to the present invention. Figure 9 This invention relates to an anaerobic acidification device for kitchen waste suitable for engineering applications. Figure 8 Enlarged view of area B.

[0029] The following are the labeling instructions in the diagram: 1. Rigid pressure-bearing outer cylinder; 2. Feed inlet; 3. Flexible shearing assembly; 301. Flexible pressure-bearing inner liner body; 302. Inner liner upper edge pressure plate; 303. Mounting ring plate; 304. Annular corrugated rib; 305. Rib corrugated groove; 306. Fabric reinforcement layer; 307. Flexible thin-film pressure sensor; 308. Axial guide rib; 4. Bladder body drive assembly; 401. Cavity support plate; 402. Bladder body back plate; 403. Adjusting screw; 404, flexible bladder; 405, adjusting handwheel; 406, through-wall pipe; 407, flexible bellows; 408, electromagnetic quick-cut valve; 409, annular distribution pipe; 4010, overpressure relief valve; 4011, anti-rotation telescopic rod; 4012, servo motor; 5, gas collection hood; 6, exhaust main pipe; 7, multi-parameter sensor integrated base; 8, conveying pipe; 9, main feed pipe; 10, conical bulk material cap; 11, slag discharge screw conveyor. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] like Figures 1 to 9 As shown, an anaerobic acid-producing device for kitchen waste suitable for engineering applications includes a rigid pressure-bearing outer cylinder 1, a feed inlet 2, a multi-parameter sensor integrated base 7, a conveying pipe 8, a conical bulking cap 10, and a slag discharge screw conveyor 11. The rigid pressure-bearing outer cylinder 1 is internally equipped with a flexible shearing component 3 and a bladder driving component 4. The flexible shearing assembly 3 includes a flexible pressure-bearing inner liner body 301, an mounting ring plate 303, several flexible thin-film pressure sensors 307, and axial guide ribs 308. The upper outer ring of the flexible pressure-bearing inner liner body 301 is fixedly connected to an inner liner upper edge pressure plate 302 that is adaptively matched with the mounting ring plate 303. The outer ring of the mounting ring plate 303 is fixedly connected to the upper inner wall of the rigid pressure-bearing outer cylinder 1. The flexible pressure-bearing inner liner body 301 is fixed inside the rigid pressure-bearing outer cylinder 1 by the inner liner upper edge pressure plate 302 and the mounting ring plate 303. The inner wall of the flexible pressure-bearing inner liner body 301 is integrally provided with several annular corrugated ribs 304. The outer ring of the flexible pressure-bearing inner liner body 301 is provided with several corrugated rib grooves 305 that are adaptively matched with the annular corrugated ribs 304. The flexible pressure-bearing inner liner body 301 is embedded with a fabric reinforcement layer 306 and several sets of equidistantly arranged flexible thin-film pressure sensors 307.

[0032] The bladder driving assembly 4 includes several cavity support plates 401, a through-wall pipe 406, and a flexible corrugated pipe 407. The cavity support plates 401 are fixedly installed on the inner wall of the rigid pressure-bearing outer cylinder 1. Through slots, compatible with the flexible pressure-bearing inner liner body 301, are centrally located at the upper and lower ends of each cavity support plate 401. Several bladder back plates 402 are slidably installed on the top surface of each cavity support plate 401 and around the flexible pressure-bearing inner liner body 301, with the bladder back plates 402 facing the flexible pressure-bearing inner liner body 301. A flexible bladder 404 is installed on one side. An adjusting screw 403 is rotatably installed on the side of the bladder back plate 402 away from the flexible bladder 404. A plurality of annular distribution pipes 409, adapted to the flexible bladder 404, are arranged around the outer ring of the rigid pressure-bearing outer cylinder 1. The upper air inlets of the plurality of flexible bladders 404 are connected to the delivery port of the annular distribution pipes 409 through flexible corrugated pipes 407 and through-wall pipes 406. An electromagnetic quick-cut valve 408 is provided at the connection between each through-wall pipe 406 and the annular distribution pipe 409. As a technical optimization of the present invention, the end of the adjusting screw 403 away from the back plate 402 of the bladder is provided with a telescopic cavity, and an anti-rotation telescopic rod 4011 is slidably installed inside the telescopic cavity. The adjusting screw 403 is connected to an adjusting handwheel 405 or a servo motor 4012 through the anti-rotation telescopic rod 4011 and a detachable bolt.

[0033] The telescopic cavity, combined with the anti-rotation telescopic rod 4011 and detachable bolts, allows the front end of the adjusting screw 403 to be replaced with the adjusting handwheel 405 or the servo motor 4012. The length of the adjusting screw 403 can be extended by the sliding of the anti-rotation telescopic rod 4011 within the telescopic cavity.

[0034] As a technical optimization of the present invention, the flexible pressure-bearing inner liner body 301 is suspended and installed inside the rigid pressure-bearing outer cylinder 1. The upper part of the flexible pressure-bearing inner liner body 301 is cylindrical and the lower part is inverted conical. Several annular pleated ribs 304 are arranged equidistantly along the axial direction of the flexible pressure-bearing inner liner body 301, and several axial guide ribs 308 are arranged vertically and evenly along the inner wall of the flexible pressure-bearing inner liner body 301 to restrict the circumferential rotation of the material.

[0035] The inner liner has an upper round and lower conical structure, which facilitates the sinking of materials by gravity. The equidistant annular pleated ribs 304 ensure uniform shearing, and the axial guide ribs 308 effectively inhibit the material from rotating with the inner liner in the circumferential direction, forcing the material to be pushed downward along the axial direction, reducing dead zones and improving the smoothness of slag discharge.

[0036] As a technical optimization of the present invention, the flexible pressure-bearing inner liner body 301, the annular corrugated ribs 304, and the axial guide ribs 308 are all made of oil-resistant and wear-resistant butyl rubber composite material. The surface of the annular corrugated ribs 304 is coated with a PTFE wear-resistant coating with a thickness of 0.3~0.5mm. The cross-section of several annular corrugated ribs 304 is trapezoidal. Several annular corrugated ribs 304 form a group. The position of each group of annular corrugated ribs 304 is adapted to match the flexible bladder 404. The fold spacing of the annular corrugated ribs 304 located in the upper part of the flexible pressure-bearing inner liner body 301 is greater than the fold spacing of the lower part.

[0037] Made of butyl rubber composite material, it is oil-resistant and wear-resistant, suitable for the high oil and sand environment of kitchen waste. The PTFE coating reduces friction and adhesion. The pleated spacing design with a loose upper part and a dense lower part allows the upper part to mainly guide and the lower part to mainly shear and grind, optimizing the treatment effect of 304 on the annular pleated ribs at different heights.

[0038] As a technical optimization of the present invention, the outer end of the adjusting screw 403 can be equipped with an adjusting handwheel 405 for manual fine-tuning on site, or replaced with a servo motor 4012 for remote automated precise forward and backward adjustment, so as to realize the position adjustment of the flexible bladder 404 under different working conditions.

[0039] By replacing the adjustment handwheel 405 or the servo motor 4012, it supports both manual fine-tuning and remote automated drive, so as to flexibly configure according to the project budget and automation requirements, reduce initial investment, and improve the convenience of operation and maintenance.

[0040] As a technical optimization of the present invention, an overflow pipe is connected to one lower position of each of the several flexible bladders 404, and an overpressure overflow valve 4010 is provided at the connection between the overflow pipe and the flexible bladder 404.

[0041] The flexible bladder 404 is protected against overpressure. The overpressure relief valve 4010 can automatically release pressure when the pressure inside the flexible bladder 404 exceeds the limit, preventing damage to the flexible bladder 404, ensuring the safety of the device operation, and avoiding shutdown failures caused by overpressure.

[0042] As a technical optimization of the present invention, a feed pipe 9 is provided at the center of the top surface of the flexible pressure-bearing inner liner body 301. The lower end of the feed port 2 extends into the interior of the rigid pressure-bearing outer cylinder 1 and is connected to the top of the feed pipe 9 through the conveying pipe 8. A conical material distribution cap 10 is installed at the bottom of the feed pipe 9.

[0043] During feeding, the conical material distribution cap 10 disperses the material to the entire area of ​​the flexible pressure-bearing inner liner body 301, avoiding local blockage caused by concentrated material accumulation. In conjunction with the concave and convex deformation of the flexible pressure-bearing inner liner body 301, it further prevents impurities around the feed inlet 2 from bridging, ensuring continuous feeding for 24 hours in an engineered manner.

[0044] As a technical optimization of the present invention, a gas collection hood 5 is provided above the top of the flexible pressure-bearing inner liner body 301. The top of the gas collection hood 5 is connected to an exhaust manifold 6. The top of the exhaust manifold 6 extends out of the top surface of the rigid pressure-bearing outer cylinder 1. A lifting ring is provided at the corner of the top surface of the rigid pressure-bearing outer cylinder 1.

[0045] It can achieve centralized collection and export of acidified gas, avoid odor leakage, ensure the stability of anaerobic environment, and the lifting ring facilitates the overall hoisting of the device, reducing the difficulty of equipment installation and adapting to the needs of large-scale engineering installation.

[0046] As a technical optimization of the present invention, a slag discharge valve pipe is provided at the center of the bottom end of the rigid pressure-bearing outer cylinder 1, the bottom end of the flexible pressure-bearing inner liner body 301 is connected to the top end of the slag discharge valve pipe through a sealing flange, and the feeding port of the slag discharge screw conveyor 11 is connected to the bottom end of the slag discharge valve pipe. The slag discharge screw conveyor 11 is used to continuously and tightly discharge the residue.

[0047] The slag discharge screw conveyor 11 enables continuous and sealed slag discharge, preventing odor leakage and eliminating the need for shutdown and tank cleaning. Combined with the flexible pressure-bearing inner liner body 301 inverted cone structure, it improves the smoothness of slag discharge and prevents slag accumulation and blockage.

[0048] As a technical optimization of the present invention, the multi-parameter sensor integration base 7 is installed on one side of the top surface of the annular corrugated rib 304. The multi-parameter sensor integration base 7 is provided with a sensor group for real-time monitoring of the process parameters of the flexible pressure-bearing inner liner body 301. The sensor group includes an oxygen content sensor, a temperature sensor, a pH sensor, an ORP sensor, and a liquid level sensor.

[0049] The multi-parameter sensor integration base 7 enables real-time monitoring of all operating parameters, accurately controlling the anaerobic environment, reaction temperature, and material state, facilitating dynamic adjustment of operating conditions, ensuring stable acid production efficiency, and reducing the risk of reaction failure.

[0050] It should be noted that this invention is an anaerobic acid-producing device for kitchen waste suitable for engineering applications. In the prior art, nitrogen gas is introduced into the inner cavity of the flexible pressure-bearing inner liner 301 through the feed inlet 2 to replace the air in the cavity. The oxygen content sensor, temperature, pH, ORP, and liquid level sensors in the multi-parameter sensor integrated seat 7 are used to monitor various parameters in real time. Once the oxygen content in the inner cavity is ≤0.2% and the other conditions meet the survival environment requirements of anaerobic acid-producing bacteria in kitchen waste, the preparatory steps are completed, which will not be elaborated here. After the anaerobic environment preparation is completed, personnel can connect the feed inlet 2 to the external kitchen waste feeding pipe to transport the kitchen waste to be processed into the interior of the flexible pressure-bearing inner liner 301.

[0051] Because the flexible pressure-bearing inner liner body 301 is fixed inside the rigid pressure-bearing outer cylinder 1 by the pressure plate 302 on the upper edge of the inner liner and the mounting ring plate 303 to form a flexible storage bladder structure, the kitchen waste to be processed is fed into the inner cavity of the flexible pressure-bearing inner liner body 301 through the feed pipe 9 and the conveying pipe 8 and the feed port 2. During the falling process, the material is evenly dispersed to the entire radial section of the inner liner by the conical material distribution cap 10 to avoid the material from accumulating in the center of the inner liner. During the feeding process, the feeding speed is controlled by the external feeding pump to achieve continuous and stable feeding for 24 hours in an engineered manner.

[0052] While feeding, multiple sets of flexible bladders 404 are fixed in an axial array along the annular pleated ribs 304, and the medium interface of each flexible bladder 404 is connected to the annular distribution pipe 409 outside the rigid pressure-bearing outer cylinder 1 through the flexible bellows 407 and the through-wall pipe 406. Each pipeline is equipped with an electromagnetic quick-cut valve 408. Personnel can connect the air inlet of the annular distribution pipe 409 to the external driving medium pump station in advance to complete the construction of the medium delivery path. Subsequently, personnel can connect the air pressure and liquid level monitoring elements in the multi-parameter sensor integrated base 7 to the external host computer signal. Then, with the help of the external host computer, the driving medium can be delivered to the array-installed flexible bladders 404 through the annular distribution pipe 409 according to the preset sequence. By controlling the independent switch of each electromagnetic quick-cut valve 408, differentiated timing pressurization of flexible bladders 404 at different positions can be achieved. During the pressurization process, the flexible bladder 404 expands and squeezes the corresponding area of ​​the flexible pressure-bearing inner liner body 301, causing the flexible pressure-bearing inner liner body 301 to form a controllable local depression. The inner liner area corresponding to the unpressurized bladder remains in its initial state, forming a continuous undulating deformation, thereby forming a periodically distributed pressure zone and non-pressure zone.

[0053] During the concave-convex deformation of the flexible pressure-bearing inner liner body 301, the annular corrugated ribs 304 on its inner wall generate radial and circumferential bidirectional shearing between the pressure zone and the non-pressure zone. Combined with the enhanced deformation response of the corrugated grooves 305, it continuously kneads, disperses, and guides heterogeneous impurities such as plastics, fibers, and bones mixed in the kitchen waste, preventing impurities from accumulating and bridging on the inner wall and at the feed inlet of the flexible pressure-bearing inner liner body 301. At the same time, the axial guide ribs 308 on the inner wall of the flexible pressure-bearing inner liner body 301 can limit the circumferential inertial rotation of the material and guide the material to flow smoothly along the axial direction, preventing impurities from entangled and accumulating, and ensuring the continuous and stable operation of the device 24 hours a day. The acidification gas generated by the anaerobic hydrolysis and acidification of kitchen waste is collected by the gas collection hood 5 at the top of the flexible pressure-bearing inner liner body 301 and transported to the subsequent resource recovery system through the exhaust manifold 6, realizing the synchronous collection of products to complete the acidification treatment step.

[0054] During the continuous operation of the device, the filling and discharging modes of the flexible bladder 404 are dynamically switched by an external host computer. This is used to actively change the flow field morphology inside the inner bladder according to the feed solids content, material viscosity, and internal reaction parameters, thereby breaking through the limitation of the fixed flow field of the rigid tank.

[0055] Under normal operating conditions, a circumferential torsional kneading mode can be executed. By controlling a ring of flexible bladders 404 at the same axial height, the pressure is alternately increased and decreased in the diagonal quadrants in a cyclical manner, driving the flexible pressure-bearing inner liner 301 to form a circumferential reciprocating torsion. This forces the material to form an irregular turbulent circulation, preventing the fluid from forming a fixed low-resistance flow channel and eliminating channeling. Under high solids content conditions, an axial spiral peristaltic mode can be executed. By sequentially increasing and simultaneously decreasing pressure along the height direction of the rigid pressure-bearing outer cylinder 1 from bottom to top, combined with the above-mentioned circumferential torsional control, a spiral peristaltic wave can be formed, forcing the kitchen waste in the flexible pressure-bearing inner liner 301 to circulate in the entire axial and radial domain, eliminating the flow dead zones in the bottom and corner areas of the tank.

[0056] In cases of severe material clumping, a high-frequency shearing mode can be executed, where adjacent flexible capsules 404 alternately inflate and deflate at high frequency, forming high-frequency concave-convex deformation, which drives the annular pleated ribs 304 to move at high frequency, making it easier to continuously break up the clumped high-solids materials, break the bacterial clumps on the surface of organic matter, and allow the organic matter in kitchen waste to come into full contact with acid-producing bacteria.

[0057] During the adjustment process, multiple flexible membrane pressure sensors 307 installed inside the flexible pressure-bearing inner tank body 301 can monitor the material extrusion pressure in different areas in real time. Temperature, pH, ORP, and liquid level sensors in the multi-parameter sensor integration base 7 monitor reaction parameters in real time and feed them back to the external host computer control system to dynamically adjust the filling pressure, timing cycle, and operation mode of the flexible bladder 404, achieving closed-loop control and effectively eliminating the 20% to 30% reaction dead zone of traditional rigid tanks, thus improving the treatment efficiency of anaerobic acid production. During operation, if the pressure inside a single flexible bladder 404 exceeds the preset threshold, the overpressure relief valve 4010 on the corresponding pipeline will automatically open to release pressure, preventing overpressure from causing inner tank tearing and bladder rupture, and ensuring safe continuous operation.

[0058] When the solids content and impurity percentage of the feed fluctuate significantly, personnel can automatically adjust the distance between the flexible bladder 404 and the flexible pressure-bearing inner liner 301 by rotating the adjustment handwheel 405 or driving the adjustment screw 403 radially through the servo motor 4012. This allows for the dynamic adjustment of the distance between the flexible bladder 404 and the flexible pressure-bearing inner liner 301. Specifically, for high-solids, high-impurity, and difficult-to-process materials, the distance can be adjusted to increase the extrusion stroke after the bladder is pressurized, thereby enhancing the shearing and grinding effect. For low-solids, conventional materials, the distance can be adjusted to accommodate mild mixing requirements. This allows for quick adaptation to different feeding conditions without the need to replace the bladder, thus improving the flexibility of use.

[0059] Furthermore, after long-term repeated inflation and deflation, the flexible bladder 404 may experience elastic fatigue and relaxation deformation, resulting in insufficient extrusion stroke and reduced shearing effect. In such cases, the screw 403 can be adjusted to push the bladder back plate 402 forward, causing the flexible bladder 404 to move forward synchronously. This compensates for the fatigue relaxation of the bladder, restores its initial extrusion stroke and shearing effect, effectively extends the service life of the flexible bladder 404, reduces the frequency of replacing the bladder, and meets the requirements of long-term continuous operation in engineering.

[0060] After the kitchen waste is hydrolyzed and acidified inside the flexible pressure-bearing inner liner 301, the non-degradable residue inside settles to the bottom of the flexible pressure-bearing inner liner 301. Since the discharge port at the bottom of the flexible pressure-bearing inner liner 301 is connected to the slag discharge port of the rigid pressure-bearing outer cylinder 1 through a sealing flange, and the end of the slag discharge port is connected to the feeding port of the slag discharge screw conveyor 11, the slag discharge can be achieved by opening the slag discharge valve and starting the slag discharge screw conveyor 11, without stopping the machine to clean the tank, thus avoiding the leakage of odor. When necessary, the acidified gas or biogas generated by itself can be directly used as the pneumatic driving medium of the flexible bladder 404, and the gas generated can be recovered and utilized through an external pressure stabilizing tank. The specific details will not be elaborated further.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anaerobic acid-generating device for kitchen waste suitable for engineering applications, comprising a rigid pressure-bearing outer cylinder (1), a feed inlet (2), a multi-parameter sensor integrated base (7), a conveying pipe (8), a conical material sludge cap (10), and a slag discharge screw conveyor (11), characterized in that: The rigid pressure-bearing outer cylinder (1) is internally provided with a flexible shearing component (3) and a bladder driving component (4). The flexible shearing assembly (3) includes a flexible pressure-bearing inner liner body (301), an mounting ring plate (303), several flexible thin-film pressure sensors (307), and axial guide ribs (308). The upper outer ring of the flexible pressure-bearing inner liner body (301) is fixedly connected to an inner liner upper edge pressure plate (302) that is compatible with the mounting ring plate (303). The outer ring of the mounting ring plate (303) is fixedly connected to the upper inner wall of the rigid pressure-bearing outer cylinder (1). The flexible pressure-bearing inner liner body (301) is connected to the upper inner wall of the rigid pressure-bearing outer cylinder (1) via the upper edge of the inner liner. The pressure plate (302) and the mounting ring plate (303) are fixed inside the rigid pressure-bearing outer cylinder (1). The inner wall of the flexible pressure-bearing inner liner body (301) is integrally provided with a number of annular pleated ribs (304). The outer ring of the flexible pressure-bearing inner liner body (301) is provided with a number of rib corrugated grooves (305) that are adapted to match the annular pleated ribs (304). The flexible pressure-bearing inner liner body (301) is embedded with a fabric reinforcement layer (306) and a number of sets of equidistantly arranged flexible thin film pressure sensors (307). The capsule driving assembly (4) includes several cavity support plates (401), a through-wall pipe (406), and a flexible corrugated pipe (407). Several cavity support plates (401) are fixedly installed on the inner wall of the rigid pressure-bearing outer cylinder (1). Through slots that adapt to the flexible pressure-bearing inner liner body (301) are opened at the center of the upper and lower ends of the cavity support plates (401). Several capsule back plates (402) are slidably installed on the top surface of the cavity support plates (401) and around the flexible pressure-bearing inner liner body (301). The capsule back plates (402) face the flexible pressure-bearing inner liner body (301). A flexible bladder (404) is installed on the side. An adjusting screw (403) is rotatably installed on the side of the bladder back plate (402) away from the flexible bladder (404). A number of annular distribution pipes (409) adapted to the flexible bladder (404) are arranged around the outer ring of the rigid pressure-bearing outer cylinder (1). The upper air inlets of the flexible bladder (404) are all connected to the delivery port of the annular distribution pipe (409) through flexible corrugated pipes (407) and through-wall pipes (406). An electromagnetic quick-cut valve (408) is provided at the connection between each through-wall pipe (406) and the annular distribution pipe (409).

2. The anaerobic acidification device for kitchen waste suitable for engineering applications according to claim 1, characterized in that: The adjusting screw (403) has a telescopic cavity at one end away from the back plate (402) of the bladder body. An anti-rotation telescopic rod (4011) is slidably installed inside the telescopic cavity. The adjusting screw (403) is connected to an adjusting handwheel (405) or a servo motor (4012) through the anti-rotation telescopic rod (4011) and a detachable bolt.

3. The anaerobic acid-producing device for kitchen waste suitable for engineering applications according to claim 1, characterized in that: The flexible pressure-bearing inner liner body (301) is suspended inside the rigid pressure-bearing outer cylinder (1). The upper part of the flexible pressure-bearing inner liner body (301) is cylindrical and the lower part is inverted conical. Several annular pleated ribs (304) are equidistantly arranged along the axial direction of the flexible pressure-bearing inner liner body (301), and several axial guide ribs (308) are evenly arranged vertically along the inner wall of the flexible pressure-bearing inner liner body (301) to restrict the circumferential rotation of the material.

4. The anaerobic acid-producing device for kitchen waste suitable for engineering applications according to claim 3, characterized in that: The flexible pressure-bearing inner liner body (301), the annular corrugated ribs (304), and the axial guide ribs (308) are all made of oil-resistant and wear-resistant butyl rubber composite material. The surface of the annular corrugated ribs (304) is coated with a PTFE wear-resistant coating with a thickness of 0.3~0.5mm. The cross-section of several annular corrugated ribs (304) is trapezoidal. Several annular corrugated ribs (304) form a group. The position of each group of annular corrugated ribs (304) is adapted to match the flexible bladder (404). The fold spacing of the annular corrugated ribs (304) located in the upper part of the flexible pressure-bearing inner liner body (301) is greater than the fold spacing of the lower part.

5. The anaerobic acid-producing device for kitchen waste suitable for engineering applications according to claim 2, characterized in that: The outer end of the adjusting screw (403) can be equipped with an adjusting handwheel (405) for on-site manual fine-tuning, or replaced with a servo motor (4012) for remote automated precise forward and backward adjustment, so as to realize the position adjustment of the flexible capsule (404) under different working conditions.

6. The anaerobic acidification device for kitchen waste suitable for engineering applications according to claim 1, characterized in that: Several flexible bladders (404) are connected to an overflow pipe on one side at a lower position, and an overpressure relief valve (4010) is provided at the connection between the overflow pipe and the flexible bladder (404).

7. The anaerobic acidification device for kitchen waste suitable for engineering applications according to claim 1, characterized in that: A feed pipe (9) is provided at the center of the top surface of the flexible pressure-bearing inner liner body (301). The lower end of the feed port (2) extends into the interior of the rigid pressure-bearing outer cylinder (1) and is connected to the top of the feed pipe (9) through the conveying pipe (8). A conical material distribution cap (10) is installed at the bottom of the feed pipe (9).

8. The anaerobic acidification device for kitchen waste suitable for engineering applications according to claim 1, characterized in that: The flexible pressure-bearing inner liner body (301) is provided with a gas collection hood (5) above the top. The top of the gas collection hood (5) is connected to an exhaust manifold (6). The top of the exhaust manifold (6) extends out of the top surface of the rigid pressure-bearing outer cylinder (1). The top surface of the rigid pressure-bearing outer cylinder (1) is provided with lifting rings at the corners.

9. The anaerobic acidification device for kitchen waste suitable for engineering applications according to claim 1, characterized in that: The rigid pressure outer cylinder (1) has a slag discharge valve pipe at the center of its bottom end. The bottom end of the flexible pressure inner liner body (301) is connected to the top end of the slag discharge valve pipe through a sealing flange. The feeding port of the slag discharge screw conveyor (11) is connected to the bottom end of the slag discharge valve pipe. The slag discharge screw conveyor (11) is used to continuously and tightly discharge the residue.

10. The anaerobic acidification device for kitchen waste suitable for engineering applications according to claim 1, characterized in that: The multi-parameter sensor integrated base (7) is installed on one side of the top surface of the annular pleated rib (304). The multi-parameter sensor integrated base (7) is equipped with a sensor group for real-time monitoring of the process parameters of the flexible pressure-bearing inner liner body (301). The sensor group includes an oxygen content sensor, a temperature sensor, a pH sensor, an ORP sensor, and a liquid level sensor.

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