Film-coated aerobic fermentation tank

Abstract

The invention discloses a film-coated aerobic fermentation tank, and relates to the technical field of organic solid waste disposal and resource utilization, the film-coated aerobic fermentation tank comprises a fermentation tank, a liquid collecting tank and a liquid scraping assembly, the liquid scraping assembly comprises a liquid scraping guide plate and a driving mechanism reciprocating along the length direction of a film to be scraped, and the liquid scraping guide plate is connected with the driving mechanism; the liquid scraping guide plate comprises a liquid scraping bulge and guide grooves, the liquid scraping bulge is in contact with a to-be-scraped liquid film, the radian of the liquid scraping bulge is matched with that of the to-be-scraped liquid film in the width direction, the guide grooves are formed in the two sides of the liquid scraping bulge in the movement direction, and the liquid collecting tank is located below side end notches of the guide grooves and arranged on the upper surface of the side wall of the fermentation tank; the driving mechanism drives the liquid scraping protrusion to reciprocate below the film to be scraped, condensate on the lower surface of the film to be scraped is scraped off, the scraped condensate enters the flow guide groove and is guided into the liquid collecting groove, active scraping of the condensate under the film is achieved, and the treatment effect on the condensate is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of organic solid waste disposal and resource utilization, in particular to a film-covered aerobic fermentation tank. Background Art

[0002] In recent years, film-covered aerobic fermentation, as an emerging high-efficiency and environmentally friendly fermentation technology, has been widely used in the fertilizer and bedding utilization of aquaculture solid waste. Its main principle is to cover a layer of selectively permeable functional membrane on the surface of the fermented material, supplemented by forced ventilation, so that the entire fermentation process is maintained in a closed micro-positive pressure environment. This technology can effectively improve the oxygen utilization efficiency, prolong the duration of high temperature, and reduce the emission of odorous gases. However, in the actual large-scale film-covered high-temperature fermentation process, due to the large temperature difference between the inside and outside of the membrane, the high-temperature water vapor under the membrane continues to condense under the functional membrane to form a layer of condensate. Most of the condensed liquid will flow back to the pile, so that the pile material maintains a high moisture content for a long time. According to experimental results, the moisture content of the upper layer of the pile is maintained at about 70% for a long time, which greatly affects the fermentation rate, fermentation uniformity and overall drying effect. Therefore, there is an urgent need for rapid collection technology and equipment for sub-membrane condensate to achieve rapid removal of moisture from the pile material.

[0003] Currently, the method known to the applicant for treating the condensate under the membrane is to rely on the natural lateral flow of the condensate to collect and treat it. For example, U-shaped grooves are set on both sides of the wide width of the arched functional membrane under a slightly positive pressure environment. Part of the condensate will naturally flow along the arched functional membrane into the U-shaped groove. The condensate collected in the U-shaped groove can be discharged for treatment. However, this method is a passive treatment, and some condensate still drips onto the pile, resulting in poor treatment effect of this method. Summary of the invention

[0004] The purpose of the present invention is to provide a film-coated aerobic fermentation tank to solve the problems existing in the above-mentioned prior art. The condensate on the film to be scraped is actively scraped off and introduced into a collecting tank by a scraping assembly driven by a driving mechanism, thereby improving the treatment effect of the condensate.

[0005] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a film-coated aerobic fermentation tank, comprising a fermentation tank, a liquid collecting tank and at least one scraping component, the scraping component comprising a scraping guide plate and a driving mechanism for generating reciprocating motion, the scraping guide plate is connected to the driving mechanism, the reciprocating motion direction of the driving mechanism is parallel to the length direction of the liquid film to be scraped, the scraping guide plate comprises a scraping protrusion in contact with the liquid film to be scraped and a guide groove for diversion, the scraping protrusion matches the curvature of the liquid film to be scraped in the width direction, the guide grooves are arranged on both sides of the scraping protrusion along the movement direction, the top notch of the guide groove is lower than the lower surface of the liquid film to be scraped, the guide groove is located on the falling path of the liquid scraped by the scraping protrusion, the collecting tank is located below the side end notch of the guide groove, the length direction of the collecting tank is parallel to the length direction of the liquid film to be scraped, and the collecting tank is arranged on the top wall surface of the fermentation tank.

[0006] Preferably, the scraping protrusion and the guide groove are integrally formed, and the curvature of the guide groove matches the curvature of the scraping protrusion.

[0007] Preferably, the driving mechanism includes a rack and a driving motor, the rack is parallel to the length direction of the liquid film to be scraped, the driving motor is connected to the bottom of the guide groove, the output shaft of the driving motor is perpendicular to the length direction of the liquid film to be scraped, and a gear is provided on the output shaft, and the gear is meshingly connected to the rack.

[0008] Preferably, the rack is arranged on the inner side wall of the liquid collecting trough close to the guide groove, and a connecting rod is arranged on the driving motor, the scraping protrusion or the guide groove, and a rolling element is rotatably arranged on the free end of the connecting rod, and the rolling surface of the rolling element is in contact with and supported by the upper surface of the side wall of the liquid collecting trough close to the guide groove.

[0009] Preferably, the rack and the gear are both spaced apart from the bottom of the liquid collecting tank.

[0010] Preferably, when a plurality of the wiper assemblies are provided, adjacent wiper assemblies are fixedly connected.

[0011] Preferably, the bottom of the liquid collecting trough is a gently sloping structure, and the lowest point of the bottom of the liquid collecting trough is connected to the outside through a pipette pipeline.

[0012] Preferably, the outlet end of the pipetting conduit has a level lower than the lowest level of the bottom of the liquid collecting trough.

[0013] Preferably, the film-covered aerobic fermentation tank further includes an electric controller for controlling the movement of the driving mechanism and a power supply for providing electric energy, the electric controller is electrically connected to the driving mechanism, and both the electric controller and the driving mechanism are electrically connected to the power supply.

[0014] Preferably, the electric controller is arranged below the highest point of the guide groove, and the electric controller is connected to the bottom of the guide groove.

[0015] Compared with the prior art, the present invention mainly achieves the following technical effects:

[0016] When the driving mechanism drives the wiper assembly to move, the wiper protrusion reciprocates under the film to be wiped, scraping off the condensed liquid on the lower surface of the film to be wiped. The scraped condensed liquid will enter the guide groove and be guided to the side end groove, and then fall into the collecting groove to be collected. The driving mechanism drives the wiper assembly to move, thereby realizing the active scraping of the condensed liquid under the membrane, greatly improving the treatment effect of the condensed liquid.

[0017] Compared with the prior art, other solutions of the present invention have achieved the following technical effects:

[0018] You only need to pre-set the scraping step length, reciprocating frequency and speed through the program on the electronic controller to realize automatic reciprocating scraping of the condensate under the membrane. The whole process is fully automatic and no long-term manual monitoring is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a structural schematic diagram of a film-covered aerobic fermentation tank in an embodiment of the present invention;

[0021] Figure 2 It is a cross-sectional view of a film-covered aerobic fermentation tank in an embodiment of the present invention;

[0022] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A;

[0023] Figure 4 For the present invention Figure 2 Cross-sectional view of the middle BB;

[0024] Among them, 11, fermentation tank; 12, liquid collecting tank; 13, rack; 14, film to be scraped; 15, hardened ground; 21, scraping guide plate; 211, scraping protrusion; 212, guide groove; 22, electronic controller; 23, driving motor; 24, rolling parts; 3, transfer pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a film-coated aerobic fermentation tank to solve the problems existing in the prior art. The condensate on the film to be scraped is actively scraped off and introduced into a liquid collecting tank by a scraping assembly driven by a driving mechanism, thereby improving the treatment effect of the condensate.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Please refer to Figure 1 to Figure 4As shown, a coated aerobic fermentation tank is provided, including a fermentation tank 11, a liquid collecting tank 12 and at least one scraping assembly, the scraping assembly including a scraping guide plate 21 and a driving mechanism for generating reciprocating motion, the scraping guide plate 21 is connected to the driving mechanism, the driving mechanism drives the scraping guide plate 21 to reciprocate, and the reciprocating motion direction of the driving mechanism is parallel to the length direction of the liquid film 14 to be scraped; the scraping guide plate 21 includes a scraping protrusion 211 in contact with the liquid film 14 to be scraped and a guide groove 212 for diversion, the scraping protrusion 211 matches the curvature in the wide direction of the liquid film 14 to be scraped, so that along the wide direction of the liquid film 14 to be scraped, the upper surface of the entire scraping protrusion 211 is in contact with the lower surface of the liquid film 14 to be scraped, so that when the scraping protrusion 211 reciprocates, the condensate on the lower surface of the liquid film 14 to be scraped can be scraped off, and the scraping protrusion 211 moves along the movement Guide grooves 212 are provided on both sides of the moving direction. The guide grooves 212 are located on the falling path of the liquid scraped by the scraping protrusions 211, and the top notch of the guide grooves 212 needs to be lower than the lower surface of the liquid film 14 to be scraped. The collecting tank 12 is located below the side end notch of the guide grooves 212. The length direction of the collecting tank 12 is parallel to the length direction of the liquid film 14 to be scraped, and the collecting tank 12 is provided on the top wall surface of the fermentation tank 11; the working principle of the device is as follows: when the driving mechanism drives the scraping component to move, the scraping protrusions 211 reciprocate under the liquid film 14 to be scraped, and the condensed liquid on the lower surface of the liquid film 14 to be scraped is scraped off. The scraped condensed liquid will enter the guide grooves 212 and be guided to the side end notch, and then fall into the collecting tank 12 and be collected. By driving the scraping component to move by the driving mechanism, the active scraping of the condensed liquid under the membrane is realized, which greatly improves the treatment effect of the condensed liquid.

[0029] The end of the liquid-wiping protrusion 211 is also located above the liquid collecting groove 12 , so that part of the scraped condensed liquid moving along the liquid-wiping protrusion 211 directly enters the liquid collecting groove 12 .

[0030] In actual use, the wiper protrusion 211 should cover as much position as possible in the wide direction of the liquid film 14 to be wiped, and the collecting groove 12 should be set close to the edge of the liquid film 14 to be wiped. Specifically, the top of the side wall or the outer side of the collecting groove 12 away from the guide groove 212 can be connected to the edge of the liquid film 14 to be wiped to increase the wiper area of ​​the wiper protrusion 211 and improve the treatment effect on the condensate.

[0031] The scraping protrusion 211 and the guide groove 212 are integrally formed, and the curvature of the guide groove 212 matches the curvature of the scraping protrusion 211. The two are integrally formed into a plate with a cross-section similar to a W shape, which not only improves the structural strength, but also improves the continuity of the overall scraping guide plate 21, ensuring that there is no gap between the scraping protrusion 211 and the guide groove 212, so that all the scraped condensate enters the guide groove 212; in this embodiment, the design is for the two side walls of the fermentation tank 11 with the same height, and the scraping membrane 14 to be scraped is arched under a slightly positive pressure environment, that is, the scraping protrusion 211 and the guide groove 212 are both arched, and the two side ends of the guide groove 212 are bent downward.

[0032] In this embodiment, the driving mechanism includes a rack 13 and a driving motor 23. The rack 13 is parallel to the length direction of the liquid film 14 to be scraped. The driving motor 23 is connected to the bottom of the guide groove 212. The output shaft of the driving motor 23 is perpendicular to the length direction of the liquid film 14 to be scraped. A gear is arranged on the output shaft, and the gear is meshed and connected with the rack 13. The rack 13 can be independently arranged through structures such as connecting parts or brackets, and can also be arranged by being attached to the liquid collecting tank 12. The driving motor 23 outputs forward and reverse motions to drive the gear to rotate, and the gear realizes reciprocating motion on the fixed rack 13.

[0033] The driving motor 23 is a stepping motor with high control accuracy and strong controllability.

[0034] Specifically, in the present embodiment, the rack 13 is arranged on the inner side wall of the liquid collecting tank 12 near the guide groove 212, so as to make full use of the space inside the liquid collecting tank 12, and a connecting rod is arranged on the driving motor 23, the scraping protrusion 211 or the guide groove 212, and a rolling element 24 is rotatably arranged on the free end of the connecting rod, and the rolling surface of the rolling element 24 is in contact with and supported by the upper surface of the side wall of the liquid collecting tank 12 near the guide groove 212. The rolling element 24 is used to support the driving motor 23, the guide groove 212 and the scraping protrusion 211 to prevent the gear on the output shaft which is arranged downward to cooperate with the rack 13 from contacting with the bottom of the liquid collecting tank 12, and preventing the problem of large friction caused by the influence of gravity.

[0035] The rolling element 24 can be a bearing or a rotating wheel.

[0036] The rack 13 and the gear are spaced apart from the bottom of the liquid collecting tank 12 to prevent the condensate collected in the liquid collecting tank 12 from soaking the rack 13 and the gear over a large area, thereby affecting their service life.

[0037] When multiple wiper assemblies are provided, adjacent wiper assemblies are fixedly connected. The fixed connection position may be between corresponding wiper protrusions 211, between corresponding guide grooves 212, or between corresponding drive motors 23. The purpose is to enable two wiper assemblies to be fixedly connected. By means of fixed connection, the rollover phenomenon that may occur when the gear and rack 13 move in coordination can be prevented, thereby ensuring the stability of the operation of the wiper assembly.

[0038] In the present embodiment, driving mechanisms are provided at both ends of the arched guide groove 212 to further improve the stability of the operation of the wiper assembly; in other embodiments, if the driving mechanism is provided only at one end of the guide groove 212, a corresponding guide structure needs to be provided at the other end for guidance to improve the operation stability, and the guide mechanism can select a conventional slide rail and slide groove matching structure.

[0039] In order to facilitate the discharge of the condensate in the collecting tank 12, the bottom of the collecting tank 12 is set to a gentle slope structure, which can be a gentle slope with one side higher and the other side lower, or a gentle slope with the middle higher and the two sides lower. The lowest point of the bottom of the collecting tank 12 is connected to the outside through the pipetting pipe 3. A sealing plug or a valve can be set at the liquid outlet of the pipetting pipe 3. The drainage operation is completed by opening the sealing plug or the valve, and the drainage is stopped when the sealing plug or the valve is closed.

[0040] The outlet end of the pipette pipe 3 is lower than the lowest level of the bottom of the liquid collecting tank 12, so that the condensate in the liquid collecting tank 12 is naturally discharged by gravity without the need to use other suction equipment as an aid, thereby reducing costs. The pipette pipe 3 can be a downwardly inclined or downwardly curved pipe, or an L-shaped pipe, etc.

[0041] In this embodiment, an electric controller 22 and a power supply for providing electric energy are also provided. The electric controller 22 is electrically connected to the driving mechanism to control the movement of the driving mechanism. Both the electric controller 22 and the driving mechanism are electrically connected to the power supply to obtain electricity from the power supply. It is only necessary to pre-set the scraping step length, reciprocating frequency and speed on the electric controller 22 through a program to realize automatic reciprocating scraping of the condensate under the membrane. The whole process is fully automatic and no long-term manual monitoring is required.

[0042] In this embodiment, the electronic controller 22 is arranged below the highest point of the guide groove 212, and the electronic controller 22 is connected to the bottom of the guide groove 212; in other embodiments, the electronic controller 22 can also be installed at any position in the fermentation tank 11.

[0043] The fermentation tank 11 in this embodiment is set on the hardened ground 15, and the side wall of the fermentation tank 11 is formed by a brick structure, wherein both ends of the two side walls of the fermentation tank 11 in the length direction are 1 / 4 arc surfaces, eliminating the 90° sharp angle to prevent damage to the liquid film 14 to be scraped.

[0044] The laid liquid membrane 14 to be scraped is expanded polytetrafluoroethylene (ePTFE), which is evenly distributed with micropores of about 0.2μm, which can allow small molecular gases such as carbon dioxide and water vapor to be discharged, but can prevent large particle size substances such as water droplets, pathogens and dust produced during the fermentation process from passing through. Under forced ventilation, the fermentation process can always be maintained in a closed environment with a slightly positive pressure, effectively improving oxygen utilization efficiency, reducing odor gas emissions, and extending the duration of high temperature.

[0045] The actual use process includes the following steps: 1) mixing solid manure and auxiliary material expansion agent in appropriate proportions, adjusting the moisture content of the mixture to about 65%, the organic matter content to more than 75%, and the C / N to about 20; (2) transferring the mixed material to the fermentation tank 11, setting the scraping step length, reciprocating frequency and speed through the electronic controller 22, and then coating, and closing the transfer pipe 3 with a sealing plug; (3) starting forced ventilation for the entire fermentation system, and fermentation begins; (4) as the fermentation enters the temperature rise period, the condensate under the membrane increases sharply. Under the action of the drive motor 23, the scraping guide plate 21 reciprocates under the membrane, scraping a large amount of condensate under the membrane and guiding it to the guide groove 212 to be collected in the collecting tank 12. The transfer pipe 3 is opened in time to discharge the internal condensate.

[0046] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0047] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0048] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A film-covered aerobic fermentation tank, characterized in that: The invention comprises a fermentation tank, a liquid collecting tank and at least one scraping component, wherein the scraping component comprises a scraping guide plate and a driving mechanism for generating reciprocating motion, the scraping guide plate is connected to the driving mechanism, the reciprocating motion direction of the driving mechanism is parallel to the length direction of the liquid film to be scraped, the scraping guide plate comprises a scraping protrusion in contact with the liquid film to be scraped and a guide groove for guiding, the scraping protrusion matches the curvature of the liquid film to be scraped in the width direction, the guide grooves are arranged on both sides of the scraping protrusion along the motion direction, the top notch of the guide groove is lower than the lower surface of the liquid film to be scraped, the guide groove is located on the falling path of the liquid scraped by the scraping protrusion, the collecting tank is located below the side end notch of the guide groove, the length direction of the collecting tank is parallel to the length direction of the liquid film to be scraped, and the collecting tank is arranged on the top wall surface of the fermentation tank.

2. The film-covered aerobic fermentation tank according to claim 1, characterized in that: The liquid scraping protrusion is integrally formed with the guide groove, and the curvature of the guide groove matches the curvature of the liquid scraping protrusion.

3. The film-covered aerobic fermentation tank according to claim 1, characterized in that: The driving mechanism includes a rack and a driving motor, the rack is parallel to the length direction of the liquid film to be scraped, the driving motor is connected to the bottom of the guide groove, the output shaft of the driving motor is perpendicular to the length direction of the liquid film to be scraped, and a gear is provided on the output shaft, and the gear is meshed with the rack.

4. The film-covered aerobic fermentation tank according to claim 3, characterized in that: The rack is arranged on the inner side wall of the liquid collecting trough close to the guide groove, and a connecting rod is arranged on the driving motor, the scraping protrusion or the guide groove. A rolling element is rotatably arranged on the free end of the connecting rod, and the rolling surface of the rolling element is in contact with and supported by the upper surface of the side wall of the liquid collecting trough close to the guide groove.

5. The film-covered aerobic fermentation tank according to claim 4, characterized in that: The rack and the gear are both spaced apart from the bottom of the liquid collecting tank.

6. The film-covered aerobic fermentation tank according to claim 3, characterized in that: When a plurality of the wiper assemblies are provided, adjacent wiper assemblies are fixedly connected.

7. The film-covered aerobic fermentation tank according to claim 1, characterized in that: The bottom of the liquid collecting trough is a gently sloping structure, and the lowest point of the bottom of the liquid collecting trough is connected with the outside through a liquid transfer pipeline.

8. The film-covered aerobic fermentation tank according to claim 7, characterized in that: The outlet end of the pipetting pipeline has a horizontal height lower than the lowest level of the bottom of the liquid collecting tank.

9. The film-covered aerobic fermentation tank according to claim 1, characterized in that: The film-covered aerobic fermentation tank also includes an electric controller for controlling the movement of the driving mechanism and a power supply for providing electric energy. The electric controller is electrically connected to the driving mechanism, and both the electric controller and the driving mechanism are electrically connected to the power supply.

10. The film-covered aerobic fermentation tank according to claim 9, characterized in that: The electric controller is arranged below the highest point of the guide groove, and the electric controller is connected to the bottom of the guide groove.

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