An anaerobic fermentation treatment device for livestock and poultry manure and its treatment process

Abstract

The present invention relates to the technical field of anaerobic fermentation, and particularly relates to an anaerobic fermentation treatment device and a treatment process for livestock and poultry manure sewage, including a main body cylinder. A cylinder wall collection mechanism for anaerobic heating, stirring of liquid and impurity collection is provided at the lower end of the main body cylinder. The cylinder wall collection mechanism includes a first cavity opened at the lower end of the main body cylinder. A fixed plate is fixedly connected to the lower end of the main body cylinder. The transmission shaft of the motor penetrates through the fixed plate. A fixed rod is fixedly connected to the end of the transmission shaft of the motor. The fixed rod is rotatably penetrated through the main body cylinder. A plurality of rotating rods are arranged on the side surface of the fixed rod. A liquid surface collection mechanism for collecting suspended substances on the liquid surface is provided at the upper end of the fixed rod; the second fixed body rotates along the inner wall of the main body cylinder driven by the motor. While rotating, the sewage mixed with impurities flows into the second limiting body, and the impurities are collected in the second limiting body through the second filter membrane, so that fine suspended impurities in the sewage can be removed.

Description

Technical Field

[0001] The present invention relates to the technical field of anaerobic fermentation, and particularly relates to an anaerobic fermentation treatment device for livestock and poultry manure and its treatment process. Background Art

[0002] Anaerobic fermentation of livestock and poultry manure is a biological treatment technology mainly used to treat manure and sewage generated during livestock and poultry breeding. This treatment method degrades organic matter by anaerobic microorganisms under anaerobic conditions to generate biogas and other by-products. The process of anaerobic fermentation of livestock and poultry manure includes steps such as pretreatment of livestock and poultry manure, anaerobic fermentation, and gas collection. Among them, pretreatment of livestock and poultry manure is a very important step. In the prior art, solid manure and liquid in livestock and poultry manure are generally separated by a filter screen. The solid manure is subjected to aerobic composting, and the liquid is subjected to anaerobic fermentation.

[0003] In the prior art, when pretreating livestock and poultry manure, generally only a filter screen is used to separate the solid and liquid of livestock and poultry manure, and the solid manure and impurities in the livestock and poultry manure are filtered out. However, before actual fermentation, a large amount of colloidal suspended matter remains in the liquid. If it is not removed in time during pretreatment, it is easy to block the fermentation tank. Moreover, the colloidal suspended matter of impurities will generate impurity gases during the anaerobic fermentation of sewage, reducing the purity of the gas after fermentation. The prior art cannot remove the dissolved oxygen in the liquid during pretreatment, resulting in a very low efficiency of liquid anaerobic fermentation. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies in the background art and propose an anaerobic fermentation treatment device for livestock and poultry manure and its treatment process.

[0005] To achieve the above object, the technical solution adopted by the present invention is: an anaerobic fermentation treatment device for livestock and poultry manure, including a main body cylinder. A cylinder wall collection mechanism for anaerobic heating, stirring and impurity collection of the liquid is provided at the lower end of the main body cylinder. The cylinder wall collection mechanism includes a first cavity opened at the lower end of the main body cylinder. A placement groove is opened at the upper end of the main body cylinder. A fixing plate is fixedly connected to the lower end of the main body cylinder. A motor is fixedly connected to the lower end of the fixing plate. The transmission shaft of the motor penetrates through the fixing plate. The end of the transmission shaft of the motor is fixedly connected to a fixing rod. The fixing rod is rotatably penetrated through the main body cylinder. A plurality of rotating rods are arranged on the side surface of the fixing rod. A liquid surface collection mechanism for collecting suspended matter on the liquid surface is provided at the upper end of the fixing rod. Four support columns are fixedly connected to the lower end of the main body cylinder and are equally angularly distributed.

[0006] Preferably, four groups of second through holes are equiangularly distributed on the side surface of the fixed rod. Each group of the second through holes is composed of a plurality of second through holes arranged in a row. The plurality of second through holes are respectively fixedly connected to the end portions of the rotating rods. A third cavity is formed at the upper end of the fixed rod. Second cavities are respectively formed inside the plurality of rotating rods. The plurality of second cavities communicate with the third cavity respectively.

[0007] Preferably, four groups of third through holes are equiangularly and penetratingly formed on the side surfaces of the plurality of rotating rods. Each group of the third through holes is composed of a plurality of third through holes arranged at equal intervals. One-way valves are respectively fixedly connected inside the plurality of third through holes.

[0008] Preferably, second limiting grooves are respectively formed on the outer end surfaces of the plurality of rotating rods. Elastic rings are respectively fixedly connected inside the plurality of second limiting grooves. The end portions of the plurality of elastic rings are respectively fixedly connected to connecting rings slidably matched with the second limiting grooves. The end portions of the plurality of connecting rings are fixedly connected to four second fixing bodies equiangularly distributed.

[0009] Preferably, third limiting grooves are respectively formed at the upper ends of the four second fixing bodies. The four third limiting grooves penetrate through one side surface of the second fixing bodies respectively. Second limiting bodies are respectively slidably matched inside the four second fixing bodies in the third limiting grooves. One side surface of each of the four second limiting bodies is a second filter membrane. A plurality of first through holes are respectively formed on the side surfaces of the four second fixing bodies close to the second filter membrane.

[0010] Preferably, a heating net rotatably matched with the fixed rod is fixedly connected inside the first cavity of the main body cylinder. A plurality of fourth through holes are formed on the side surface of the fixed rod above the heating net. An air inlet hole is penetratingly formed at the end portion of the fixing plate. The air inlet hole is communicated with an oxygen-free gas tank through an air delivery pipe.

[0011] Preferably, the liquid level collecting mechanism includes a first limiting groove formed at the upper end of the fixed rod. A connecting rod is in threaded fit inside the first limiting groove. The upper end of the connecting rod is fixedly connected to a protection plate. The lower end of the protection plate is fixedly connected to a limiting ring rotatably matched with the placing groove. A one-way air outlet valve is penetratingly formed on the upper end surface of the protection plate. The one-way air outlet valve is connected to a collecting gas tank through an air delivery pipe.

[0012] Preferably, an installation groove is formed at the upper end of the fixed rod. An electric telescopic rod is fixedly connected inside the installation groove. The telescopic end portion of the electric telescopic rod is fixedly connected to a first fixing body. An empty groove is formed on one side surface of the first fixing body. A first accommodating groove communicated with the empty groove is formed inside the first fixing body. One side surface of the first accommodating groove is a first filter membrane. A liquid level sensor is fixedly connected to the lower end surface of the first fixing body. The liquid level sensor is connected to the electric telescopic rod through an electric wire.

[0013] An anaerobic fermentation treatment process for livestock and poultry manure sewage, comprising the following steps:

[0014] S1: The motor drives the fixed rod to rotate, the fixed rod drives several rotating rods on the side to rotate, and the several rotating rods drive the sewage to rotate. At the same time, the oxygen-free tank transports gas into the first cavity through the air delivery pipe, the heating grid is started, the gas is heated by the heating grid, then enters the third cavity through several fourth through-holes, and then the heated gas is ejected through one-way valves on the sides of the several rotating rods, which can discharge a large number of bubbles into the sewage while stirring the sewage. A large number of bubbles adhere to the periphery of fine impurities. At the same time, under the stirring of the sewage, the bubbles drive the impurities to adhere to the inner wall of the main cylinder. Then, the second fixed body rotates along the inner wall of the main cylinder driven by the motor. While rotating, the sewage mixed with impurities flows into the second limiting body, and the impurities are collected in the second limiting body through the second filter membrane, so that the fine suspended impurities in the sewage can be removed. After the pretreatment is completed, the second limiting body is slid out and cleaned;

[0015] S2: The electric telescopic rod contracts to control the distance between the liquid level sensor and the liquid level after that within a predetermined range. Then, the impurities floating on the liquid surface flow into the first receiving groove and are collected in the first receiving groove through the first filter membrane, which can ensure that the impurities in the sewage can be completely collected;

[0016] S3: Under the stirring of the several rotating rods, the oxygen in the sewage will overflow into the main cylinder and then be discharged through the one-way air outlet valve, thereby greatly reducing the oxygen content in the sewage and improving the efficiency and product purity during the subsequent anaerobic fermentation of the sewage.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The motor drives the fixed rod to rotate, the fixed rod drives several rotating rods on the side to rotate, and the several rotating rods drive the sewage to rotate. At the same time, the oxygen-free tank transports gas into the first cavity through the air delivery pipe, the heating grid is started, the gas is heated by the heating grid, then enters the third cavity through several fourth through-holes, and then the heated gas is ejected through one-way valves on the sides of the several rotating rods, which can discharge a large number of bubbles into the sewage while stirring the sewage. A large number of bubbles adhere to the periphery of fine impurities. At the same time, under the stirring of the sewage, the bubbles drive the impurities to adhere to the inner wall of the main cylinder. Then, the second fixed body rotates along the inner wall of the main cylinder driven by the motor. While rotating, the sewage mixed with impurities flows into the second limiting body, and the impurities are collected in the second limiting body through the second filter membrane, so that the fine suspended impurities in the sewage can be removed. After the pretreatment is completed, the second limiting body is slid out and cleaned;

[0019] The electric telescopic rod contracts to control the distance between the liquid level sensor and the liquid level within a predetermined range. Then, the impurities floating on the liquid surface flow into the first accommodating groove, and the impurities are collected in the first accommodating groove through the first filter membrane, which can ensure that the impurities in the sewage can be completely collected. At the same time, the heated gas can uniformly heat the sewage. At the same time, under the agitation of several rotating rods, the oxygen in the sewage will overflow into the main cylinder and then be discharged through the one-way air outlet valve, thereby greatly reducing the oxygen content in the sewage and improving the efficiency and the purity of the product during the subsequent anaerobic fermentation of the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a cross-section of the overall structure of the present invention Figure 1 ;

[0022] Figure 3 It is a cross-section of the overall structure of the present invention Figure 2 ;

[0023] Figure 4 It is a cross-section of the overall structure of the present invention Figure 3 ;

[0024] Figure 5 It is of the present invention Figure 2 an enlarged view of part A;

[0025] Figure 6 It is of the present invention Figure 3 an enlarged view of part B;

[0026] Figure 7 It is of the present invention Figure 3 an enlarged view of part C;

[0027] Figure 8 It is of the present invention Figure 4 an enlarged view of part D.

[0028] 1. Main cylinder; 2. Liquid surface collection mechanism; 3. Cylinder wall collection mechanism; 4. Support column; 11. Placing groove; 21. Protection plate; 22. One-way air outlet valve; 23. Limit ring; 24. Installation groove; 25. Electric telescopic rod; 26. First limit groove; 27. First fixing body; 28. First accommodating groove; 29. First filter membrane; 210. Connecting rod; 211. Empty groove; 212. Liquid surface sensor; 31. Motor; 32. Fixed plate; 33. First cavity; 34. Heating grid; 35. Fixed rod; 36. Rotating rod; 37. Second fixing body; 38. First through hole; 39. Air inlet hole; 310. Second limit groove; 311. Elastic ring; 312. Connecting ring; 313. Second cavity; 314. Third limit groove; 315. Second limiting body; 316. Second through hole; 317. Third through hole; 318. One-way valve; 319. Second filter membrane; 320. Third cavity; 321. Fourth through hole. Detailed implementation manners

[0029] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0030] Please refer to Figures 1 - 8 , an anaerobic fermentation treatment device for livestock and poultry manure, including a main cylinder 1, and a cylinder wall collection mechanism 3 for anaerobic heating, stirring and impurity collection of liquid is arranged at the lower end of the main cylinder 1.

[0031] In this embodiment, the cylinder wall collection mechanism 3 includes a first cavity 33 opened at the lower end of the main cylinder 1, a placing groove 11 is opened at the upper end of the main cylinder 1, a fixed plate 32 is fixedly connected to the lower end of the main cylinder 1, a motor 31 is fixedly connected to the lower end of the fixed plate 32, the transmission shaft of the motor 31 penetrates through the fixed plate 32, the end of the transmission shaft of the motor 31 is fixedly connected to a fixed rod 35, the fixed rod 35 is rotatably penetrated through the main cylinder 1, and a plurality of rotating rods 36 are arranged on the side surface of the fixed rod 35.

[0032] Four groups of second through holes 316 distributed at equal angles are opened on the side surface of the fixed rod 35, each group of the second through holes 316 is composed of a plurality of second through holes 316 arranged, and the plurality of second through holes 316 are respectively fixedly connected to the ends of the rotating rods 36, a third cavity 320 is opened at the upper end of the fixed rod 35, second cavities 313 are respectively opened inside the plurality of rotating rods 36, and the plurality of second cavities 313 are respectively communicated with the third cavity 320.

[0033] On the sides of several of the rotating rods 36, four groups of third through holes 317 are respectively and equiangularly perforated. Each group of the third through holes 317 is composed of several third through holes 317 arranged at equal intervals. One-way valves 318 are respectively fixedly connected in several of the third through holes 317.

[0034] On the outer end faces of several of the rotating rods 36, second limiting grooves 310 are respectively opened. Elastic rings 311 are respectively fixedly connected in several of the second limiting grooves 310. Connecting rings 312 that are slidably matched with the second limiting grooves 310 are respectively fixedly connected to the end parts of several of the elastic rings 311. Four second fixing bodies 37 that are equally angularly distributed are fixedly connected to the end parts of several of the connecting rings 312.

[0035] Third limiting grooves 314 are respectively opened at the upper ends of the four second fixing bodies 37. The four third limiting grooves 314 are respectively arranged through one side surface of the second fixing bodies 37. Second limiting bodies 315 are respectively slidably matched in the four second fixing bodies 37 in the third limiting grooves 314. Second filter membranes 319 are arranged on one side surface of the four second limiting bodies 315. Several first through holes 38 are respectively opened on the side surfaces of the four second fixing bodies 37 close to the second filter membranes 319.

[0036] In the first cavity 33 of the main body cylinder 1, a heating mesh 34 that is rotationally matched with the fixing rod 35 is fixedly connected. Several fourth through holes 321 are opened on the side surface of the fixing rod 35 above the heating mesh 34. An air inlet hole 39 is perforated through the end part of the fixing plate 32. The air inlet hole 39 is communicated with an oxygen-free gas tank through an air delivery pipe.

[0037] Specifically, in this embodiment, a liquid surface collection mechanism 2 for collecting liquid surface suspended matters is arranged at the upper end of the fixing rod 35. Four support columns 4 that are equally angularly distributed are fixedly connected to the lower end of the main body cylinder 1.

[0038] The liquid surface collection mechanism 2 includes a first limiting groove 26 opened at the upper end of the fixing rod 35. A connecting rod 210 is in threaded fit in the first limiting groove 26. A protection plate 21 is fixedly connected to the upper end of the connecting rod 210. A limiting ring 23 that is rotationally matched with the placing groove 11 is fixedly connected to the lower end of the protection plate 21. A one-way air outlet valve 22 is perforated through the upper end surface of the protection plate 21. The one-way air outlet valve 22 is connected to a collection gas tank through an air delivery pipe.

[0039] An installation groove 24 is formed at the upper end of the fixed rod 35. An electric telescopic rod 25 is fixedly connected in the installation groove 24. A first fixing body 27 is fixedly connected to the telescopic end of the electric telescopic rod 25. An empty groove 211 is formed on one side surface of the first fixing body 27. A first accommodating groove 28 communicating with the empty groove 211 is formed inside the first fixing body 27. A first filter membrane 29 is arranged on the side surface of the first accommodating groove 28. A liquid level sensor 212 is fixedly connected to the lower end surface of the first fixing body 27. The liquid level sensor 212 is connected to the electric telescopic rod 25 through an electric wire.

[0040] A specific anaerobic fermentation treatment process for livestock and poultry manure sewage includes the following steps:

[0041] S1: The motor 31 drives the fixed rod 35 to rotate. The fixed rod 35 drives a plurality of rotating rods 36 on the side to rotate. The plurality of rotating rods 36 drive the sewage to rotate. At the same time, the oxygen-free tank transports gas into the first cavity 33 through an air delivery pipe. The heating grid 34 is started. The gas is heated by the heating grid 34 and then enters the third cavity 320 through a plurality of fourth through holes 321. Then the heated gas is ejected through one-way valves 318 on the sides of the plurality of rotating rods 36. It can achieve discharging a large number of bubbles into the sewage while stirring the sewage. A large number of bubbles adhere around the fine impurities. At the same time, under the stirring of the sewage, the bubbles drive the impurities to adhere to the inner wall of the main body cylinder 1. Then the second fixing body 37 rotates along the inner wall of the main body cylinder 1 under the drive of the motor 31. While rotating, the sewage mixed with impurities flows into the second limiting body 315. The impurities are collected in the second limiting body 315 through the second filter membrane 319. Thus, the fine suspended impurities in the sewage can be removed. After the pretreatment is completed, the second limiting body 315 is slid out and cleaned.

[0042] S2: The electric telescopic rod 25 contracts to control the distance between the liquid level sensor 212 and the liquid level within a predetermined range. Then the impurities floating on the liquid surface flow into the first accommodating groove 28 and the impurities are collected in the first accommodating groove 28 through the first filter membrane 29, which can ensure that the impurities in the sewage can be completely collected.

[0043] S3: Under the stirring of the plurality of rotating rods 36, the oxygen in the sewage will overflow into the main body cylinder 1 and then be discharged through the one-way air outlet valve 22, thereby greatly reducing the oxygen content in the sewage and improving the efficiency and the purity of the product during the subsequent anaerobic fermentation of the sewage.

[0044] Now, the operating principle of the present invention is described as follows:

[0045] During use, place the main cylinder 1 on a horizontal surface through four support columns 4. Then pour the filtered livestock and poultry manure sewage into the placement groove 11 of the main cylinder 1. Next, screw the connecting rod 210 and the first limit groove 26 tightly with threads. At the same time, the protective plate 21 moves downward driven by the connecting rod 210, so that the limit ring 23 on the lower end face of the protective plate 21 fits with the placement groove 11. Then start the motor 31. The motor 31 drives the fixed rod 35 to rotate, and the fixed rod 35 drives several rotating rods 36 on the side to rotate. The several rotating rods 36 drive the sewage to rotate. At the same time, the oxygen-free tank transports gas through the air delivery pipe to the first cavity 33. Start the heating grid 34. The gas is heated through the heating grid 34 and then enters the third cavity 320 through several fourth through holes 321. The gas introduced is inert nitrogen. The nitrogen is ejected from the one-way valve 318 into the solution in the main cylinder 1 after heating. The ejected bubbles rise in the liquid in the form of bubbles, which can wrap the impurities suspended in the liquid and float on the water surface, facilitating the liquid surface collection mechanism 2 to collect the impurities. At the same time, under the agitation of the sewage, the bubbles drive the impurities to adhere to the inner wall of the main cylinder 1. Then the second fixing body 37 rotates along the inner wall of the main cylinder 1 driven by the motor 31. While rotating, the sewage mixed with impurities flows into the second limiting body 315. The sewage flows out through the second filter membrane 319 and the filter screen structure on the side of the second fixing body 37, and the aggregated suspended impurities are collected in the second limiting body 315. Since the second fixing body 37 rotates at a constant speed all the time and the aggregated suspended impurities have greater viscosity, the impurities are collected in the second limiting body 315 through the second filter membrane 319, so that the fine suspended impurities in the sewage can be removed. After the pretreatment is completed, slide out the second limiting body 315 and clean it.

[0046] When the cylinder wall collection mechanism 3 removes the impurities on the inner wall of the main cylinder 1, at this time, the electric telescopic rod 25 contracts, so that the distance between the liquid level sensor 212 and the liquid level later is controlled within a predetermined range. Then the impurities floating on the liquid surface flow into the first receiving groove 28, and the impurities are collected in the first receiving groove 28 through the first filter membrane 29, which can ensure that the impurities in the sewage can be completely collected. At the same time, the heated gas can uniformly heat the sewage. At the same time, under the agitation of several rotating rods 36, the oxygen in the sewage will overflow into the main cylinder 1 and then be discharged through the one-way air outlet valve 22, thereby greatly reducing the oxygen content in the sewage and improving the efficiency and product purity during the subsequent anaerobic fermentation of the sewage.

[0047] 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 by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. An anaerobic fermentation treatment device for livestock and poultry manure, comprising a main body cylinder (1), characterized in that: The lower end of the main body tube (1) is provided with a tube wall collection mechanism (3) for performing oxygen-free heating and stirring on the liquid and collecting impurities. The tube wall collection mechanism (3) comprises a first cavity (33) provided at the lower end of the main body tube (1). The upper end of the main body tube (1) is provided with a placement groove (11). The lower end of the main body tube (1) is fixedly connected to a fixing plate (32). The lower end of the fixing plate (32) is fixedly connected to a motor (31). The transmission shaft of the motor (31) passes through the fixing plate (32). The end of the transmission shaft of the motor (31) is fixedly connected to a fixing rod (35). The fixing rod (35) is rotatably arranged to pass through the main body tube (1). A plurality of rotating rods (36) are arranged at equal angles on the side of the fixing rod (35). The upper end of the fixing rod (35) is provided with a liquid surface collection mechanism (2) for collecting suspended matter on the liquid surface. The lower end of the main body tube (1) is fixedly connected to four supporting columns (4) distributed at equal angles. The outer end surfaces of the plurality of rotating rods (36) are respectively provided with second limiting grooves (310), the plurality of second limiting grooves (310) are respectively fixedly connected with elastic rings (311), the ends of the plurality of elastic rings (311) are respectively fixedly connected with connecting rings (312) that are slidably matched with the second limiting grooves (310), and the ends of the plurality of connecting rings (312) are respectively fixedly connected with four second fixing bodies (37) distributed at equal angles; A third limiting groove (314) is respectively formed at the upper end of the four second fixing bodies (37), the four third limiting grooves (314) are respectively arranged to penetrate a side surface of the second fixing body (37), the four second fixing bodies (37) are respectively slidably matched with a second limiting body (315) in the third limiting groove (314), a side surface of the four second limiting bodies (315) is provided with a second filter membrane (319), and the four second fixing bodies (37) are respectively provided with a plurality of first through holes (38) on a side surface close to the second filter membrane (319).

2. The anaerobic fermentation treatment device for livestock and poultry manure according to claim 1, characterized in that: Four groups of second through holes (316) distributed at equal angles are formed on the side of the fixed rod (35), each group is composed of a plurality of second through holes (316) arranged in an array, the plurality of second through holes (316) are respectively fixedly connected to the ends of the rotating rod (36), a third cavity (320) is formed at the upper end of the fixed rod (35), a second cavity (313) is respectively formed inside the plurality of rotating rods (36), and the plurality of second cavities (313) are respectively communicated with the third cavity (320).

3. The anaerobic fermentation treatment device for livestock and poultry manure according to claim 2, characterized in that: Four groups of third through holes (317) are respectively formed at equal angles through the side surfaces of the plurality of rotating rods (36), each group being composed of a plurality of third through holes (317) arranged at equal intervals, and a one-way valve (318) is respectively fixedly connected to the plurality of third through holes (317).

4. The anaerobic fermentation treatment device for livestock and poultry manure according to claim 1, characterized in that: A heating net (34) rotatably matched with a fixing rod (35) is fixedly connected to the main body tube (1) in the first cavity (33); a plurality of fourth through holes (321) are provided on the side of the fixing rod (35) at the upper end of the heating net (34); an air inlet (39) is provided through the end of the fixing plate (32); and the air inlet (39) is communicated with the oxygen-free tank through an air delivery pipe.

5. The anaerobic fermentation treatment device for livestock and poultry manure according to claim 1, characterized in that: The liquid level collection mechanism (2) comprises a first limiting groove (26) provided at the upper end of the fixing rod (35); a connecting rod (210) is threadedly engaged in the first limiting groove (26); a protective plate (21) is fixedly connected to the upper end of the connecting rod (210); a limiting ring (23) rotatably engaged with the placement groove (11) is fixedly connected to the lower end of the protective plate (21); a one-way air outlet valve (22) is provided through the upper end surface of the protective plate (21); and the one-way air outlet valve (22) is connected to the collecting gas tank via an air supply pipe.

6. The anaerobic fermentation treatment device for livestock and poultry manure according to claim 4, characterized in that: The upper end of the fixed rod (35) is provided with a mounting groove (24), the mounting groove (24) is fixedly connected to the electric telescopic rod (25), the telescopic end of the electric telescopic rod (25) is fixedly connected to the first fixed body (27), a side surface of the first fixed body (27) is provided with an empty groove (211), the inside of the first fixed body (27) is provided with a first receiving groove (28) communicating with the empty groove (211), the side surface of the first receiving groove (28) is provided with a first filter membrane (29), the lower end surface of the first fixed body (27) is fixedly connected to a liquid level sensor (212), and the liquid level sensor (212) is connected to the electric telescopic rod (25) via an electric wire.

7. An anaerobic fermentation treatment process for livestock and poultry manure, applied to an anaerobic fermentation treatment device for livestock and poultry manure as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1: The motor (31) drives the fixed rod (35) to rotate, the fixed rod (35) drives a plurality of rotating rods (36) on the side to rotate, the plurality of rotating rods (36) drive the sewage to rotate, and at the same time, the oxygen-free tank transports gas to the first cavity (33) through the gas pipe, the heating net (34) is started, the gas is heated by the heating net (34), and then enters the third cavity (320) through a plurality of fourth through holes (321), and then the heated gas is ejected through the one-way valves (318) on the side of the plurality of rotating rods (36), so that the sewage can be stirred and the gas can be discharged into the sewage at the same time. A large number of bubbles are discharged, and a large number of bubbles are attached to the tiny impurities. At the same time, under the stirring of the sewage, the bubbles drive the impurities to adhere to the inner wall of the main tube (1). Then, the second fixed body (37) is driven by the motor (31) to rotate along the inner wall of the main tube (1). While rotating, the sewage mixed with the impurities flows into the second limiting body (315). The impurities are collected in the second limiting body (315) through the second filter membrane (319), so that the tiny suspended impurities in the sewage can be removed. After the pretreatment is completed, the second limiting body (315) is slid out for cleaning; S2: the electric telescopic rod (25) is retracted so that the distance between the liquid level sensor (212) and the liquid level is controlled within a predetermined range, and then the impurities floating on the liquid level flow into the first containing tank (28) and are collected in the first containing tank (28) by the first filter membrane (29), thereby ensuring that the impurities in the sewage can be completely collected; S3: Under the stirring of the plurality of rotating rods (36), oxygen in the sewage will overflow into the main cylinder (1) and then be discharged through the one-way air outlet valve (22), thereby greatly reducing the oxygen content in the sewage and improving the efficiency of subsequent anaerobic fermentation of the sewage and the purity of the product.

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