A yellow slurry water treatment facility based on black film pond fermentation technology

Abstract

The present invention relates to the technical field of wastewater treatment, and discloses a yellow slurry water treatment facility based on a black film pond fermentation technology, which includes a plurality of independent fermentation ponds. A bottom film is provided closely attached to the inner wall of the fermentation pond, and a pressing mechanism one for pressing the bottom film is arranged at the top of the fermentation pond. The pressing mechanism one includes a movable pressing plate and a lifting unit for driving the movable pressing plate to lift and lower. The movable pressing plate is used to press the edge of the bottom film against the top of the fermentation pond. An annular groove is arranged inside the inner circle of the movable pressing plate, and a film winding cylinder is arranged in the annular groove. The film wound on the film winding cylinder unfolds to form an upper film and can seal the top of the fermentation pond. A fermentation space is formed between the upper film and the bottom film. The present invention is convenient for quickly building a black film pond for treating yellow slurry water, can quickly press and seal the edge of the black film, has a compact structure design and adopts a modular design, can effectively save space and can adjust the scale according to the amount of sewage.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly to a yellow slurry water treatment facility based on black film pond fermentation technology. Background Art

[0002] Yellow slurry water is a high-concentration organic wastewater generated during the processing of soy products, which is characterized by a high COD content and good biodegradability. It is usually treated by the black film anaerobic fermentation process. As an efficient biogas fermentation facility, the black film pond forms a closed fermentation space by laying a high-density polyethylene (HDPE) anti-seepage membrane in the excavated pond body underground and covering it with a black biogas membrane. While achieving wastewater treatment, it can also recover biogas energy, with the advantages of low construction cost and high gas production efficiency.

[0003] However, the existing black film ponds still have the following technical bottlenecks in practical applications:

[0004] First, the efficiency of black film laying and compaction is low, and the sealing performance is difficult to guarantee. When constructing a traditional black film pond, it is necessary to dig anchor trenches around the pond body, and manually bury the black film edge into the trench and backfill and compact it with earth and stone, or use sandbags and heavy objects to stack and fix it. This method not only has a long construction period and high labor cost, but also the compaction effect is greatly affected by the operation level, and it is easy to cause the black film to relax or the seal to fail due to uneven local stress, resulting in problems such as biogas leakage and odor emission. In addition, the anchor trench structure occupies additional land area, resulting in reduced space utilization.

[0005] Second, the pond body structure is fixed, and it is difficult to expand flexibly. Most of the existing black film ponds are single-body structures formed by one-time pouring or excavation, and their volumes are limited at the initial stage of construction. When the treatment scale needs to be increased, it can only be achieved by building a new pond body, resulting in waste of land resources, doubling of construction costs, and complication of pipeline connection between the new and old pond bodies, and significantly increasing the operation and maintenance difficulty.

[0006] Third, the gas guiding system structure is redundant and difficult to maintain. The traditional gas guiding mechanism needs to independently lay multiple groups of gas guiding pipes on the top of the black film and converge them into the main pipeline through external branch pipes. This design not only requires additional pipeline brackets and sealing components, increasing material and construction costs, but also is prone to cracking of the gas guiding pipe interface and gas leakage due to black film deformation. In addition, the pipeline is long-term exposed to the open air environment and is easily aged by ultraviolet rays or blocked by sundries, affecting the biogas collection efficiency and system stability.

[0007] The above problems restrict the large-scale application of the black film pond process in the field of yellow slurry water treatment. Therefore, it is urgent to develop a black film pond treatment facility that is convenient for rapid construction, supports modular expansion, and has a highly integrated gas guiding structure, so as to improve the engineering efficiency, reduce the operation and maintenance costs, and adapt to the dynamically changing treatment requirements. Summary of the Invention

[0008] To solve the technical problems raised in the background art, the present invention provides a yellow slurry water treatment facility based on the black film pond fermentation technology.

[0009] The present invention is implemented by the following technical solutions: A yellow slurry water treatment facility based on the black film pond fermentation technology includes a number of independent fermentation ponds. Inside the fermentation pond, a bottom film is provided closely against the pond wall, and a pressing mechanism one for pressing the bottom film is arranged at the top of the fermentation pond.

[0010] The pressing mechanism one includes a movable pressing plate and a lifting unit for driving the movable pressing plate to lift and lower. The movable pressing plate is used to press the edge of the bottom film against the top of the fermentation pond.

[0011] An annular groove is provided inside the inner circle of the movable pressing plate. A film winding cylinder is arranged in the annular groove. The film wound on the film winding cylinder unfolds to form an upper film and can seal the top of the fermentation pond. A fermentation space is formed between the upper film and the bottom film, and a pressing mechanism two for pressing the upper film against the top of the fermentation pond is movably arranged on the movable pressing plate.

[0012] A number of air outlet holes are opened on the inner wall of the fermentation pond, and notches corresponding to the air outlet holes are opened on the bottom film. A gas guiding mechanism communicating with the air outlet holes is also arranged inside the fermentation pond to guide out the biogas formed in the fermentation space.

[0013] Through a number of independently arranged fermentation ponds, the number of fermentation ponds can be increased or decreased according to the waste water volume. And pressing mechanism one and pressing mechanism two are arranged at the top of the fermentation pond, so as to facilitate quickly laying the bottom film and the upper film in the fermentation pond and fixing them. At the same time, the sealing effect is good after pressing, which is conducive to the fermentation of yellow slurry water.

[0014] As a further improvement of the above solution, the cross-section of the fermentation pond is square, and connection holes are opened at the four corners of the top surface of the fermentation pond. An elastic buffer unit is arranged at the bottom of the connection hole. A connection column corresponding to the connection hole is arranged on the bottom surface of the movable pressing plate. Four installation cavities are circumferentially distributed inside the pond wall of the fermentation pond. A lifting unit is arranged in each installation cavity, and the installation cavity and the adjacent connection hole are connected through a communication hole.

[0015] Through the above structure, the connection between the movable pressing plate and the fermentation pond is more reliable, and it is also more convenient during installation and use.

[0016] As a further improvement of the above solution, the lifting unit includes a cross bar movably arranged in the installation cavity, a lifting driving rod fixed in the installation cavity and connected to the cross bar. The cross bar is a hollow rod. Docking rods are respectively movably sleeved at both ends of the cross bar. A docking driving part for driving the docking rods to stretch and contract is arranged inside the cross bar, and the docking rods can movably pass through the communication hole. Docking holes for inserting the docking rods are opened on the side wall of the connection column.

[0017] The lifting drive rod described above can effectively lift the movable pressure plate to facilitate pressing it after laying the bottom film.

[0018] As a further improvement of the above solution, the elastic buffer unit includes a columnar spring and a bearing plate fixed to the top end of the columnar spring. The outer diameter of the columnar spring is smaller than the aperture of the connection hole, and the top surface of the bearing plate is used to contact the bottom end of the connection column. By designing the elastic buffer unit, it can prevent the movable pressure plate from directly pressing on the top of the pool before laying the bottom film. In this way, when laying the bottom film, the edge of the bottom film can quickly extend between the movable pressure plate and the top of the pool, facilitating the next step of pressing and fixing the bottom film.

[0019] As a further improvement of the above solution, the bottom surface of the movable pressure plate is provided with an annular lower convex platform, the top surface of the fermentation tank is provided with a pressing groove, and the edge of the bottom film is located in the pressing groove and is pressed by the lower convex platform. This further improves the sealing performance of the bottom film pressing.

[0020] As a further improvement of the above solution, the second pressing mechanism includes a movable frame and a plurality of pressing units circumferentially distributed on the movable pressure plate. The movable frame is arranged inside the movable pressure plate, and the plurality of pressing units press the movable frame against the top of the pool from above to seal the edge position of the unfolded upper mold.

[0021] Using the second pressing mechanism that can work manually, on the one hand, it can save costs by avoiding using intelligent control electrical components. On the other hand, since there may be moisture on site, using too many electrical components is likely to cause safety accidents and the electrical components are easily damaged.

[0022] As a further improvement of the above solution, the top of the movable pressure plate is provided with an annular upper convex platform. The pressing unit includes a bracket fixed on the upper convex platform, a rotating rod rotatably connected to the bracket. On the side of the rotating rod close to the movable frame, a resisting plate is rotatably arranged through a pin shaft, and the bottom surface of the resisting plate can contact the top surface of the movable frame. The pressing unit further includes a lifting assembly to lift the end of the rotating rod away from the movable frame upward.

[0023] The pressing mechanism adopted in this solution is convenient to operate. Manually lifting the lifting assembly can lift each rotating rod on one side upward, so that the movable pressure plate presses the movable frame downward.

[0024] As a further improvement of the above solution, the lifting assembly includes a top rod. Both ends of the top rod are connected with swing arms, and the other ends of the swing arms are respectively rotatably connected to the top of the fermentation tank, and a card slot for clamping the top rod is arranged on the bottom surface of the rotating rod.

[0025] Using the above-mentioned lifting assembly is convenient and fast to operate, and can effectively save working time.

[0026] As a further improvement of the above solution, the air guiding mechanism includes an air guiding pipe, an internal air pipe disposed in the air outlet hole, and a socket disposed at the outer port of the air outlet hole. The top end of the air guiding pipe is connected to the movable pressing plate. The bottom end of the air guiding pipe passes through the cross bar and extends into the installation cavity. A jack is formed on the side wall of the air guiding pipe. One end of the internal air pipe is docked with the jack. The socket is detachably connected to the air outlet hole, and the inner end of the socket abuts against the other end of the internal air pipe.

[0027] Before the bottom film is installed, the internal air pipe is first placed in the air outlet hole in the air guiding mechanism proposed by the present invention. After the bottom film is installed, a notch is opened at the position of the air outlet hole by a cutter, and then the socket and the air outlet hole are installed and fixed through the notch, so as to push the internal air pipe to move inward, so that the inner end of the air pipe cooperates with the jack on the air guiding pipe, and finally a passage for dredging biogas is formed.

[0028] As a further improvement of the above solution, the socket is a cylinder with a threaded outer wall. The socket is spirally connected to the air outlet hole. An annular pressing plate is further provided on the outside of the socket. The annular pressing plate is used to press the bottom film tightly against the pool wall. An air outlet cylinder communicating with the top end of the air guiding pipe is further fixed on the movable pressing plate. The air outlet cylinder is used to connect an external gas storage device for receiving biogas.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] The yellow slurry water treatment facility of the black film pond fermentation technology proposed by the present invention includes a plurality of independent fermentation ponds. A layer of bottom film is provided closely against the pool wall inside the fermentation pond. A film winding cylinder for laying the upper film is arranged at the top of the fermentation pond, and a pressing mechanism one and a pressing mechanism two are respectively arranged to press and seal the bottom film and the upper film, so as to quickly form a fermentation space. Its modular design can be infinitely expanded according to the amount of sewage, and the structure design is compact, the operation is simple and convenient. The air guiding mechanism and the pool body are integrally designed, which is convenient for quickly guiding the biogas formed in the fermentation space. At the same time, the present invention uses relatively few electrical components, which can effectively save the production cost. Description of the Drawings

[0031] Figure 1 It is a three-dimensional overall structure diagram of a single fermentation pond in the yellow slurry water treatment facility proposed by the present invention;

[0032] Figure 2 It is Figure 1 The front view of the structure in

[0033] Figure 3 It is Figure 1 The top view of the structure in

[0034] Figure 4 It is Figure 1 The enlarged view at A in

[0035] Figure 5 It isFigure 2 Cross-sectional view taken along line B-B;

[0036] Figure 6 is Figure 3 Cross-sectional view taken along line C-C;

[0037] Figure 7 Partial structural cross-sectional view after the pressing mechanism I and the pressing mechanism II of the present invention press the bottom film and the upper film respectively.

[0038] Main symbol description:

[0039] 1. Fermentation tank; 2. Movable pressing plate; 3. Upper convex platform; 4. Connecting column; 5. Docking hole; 6. Air guide pipe; 7. Movable frame; 8. Air outlet cylinder; 9. Docking rod; 10. Connecting hole; 11. Cross bar; 12. Installation cavity; 13. Lifting drive rod; 14. Air outlet hole; 15. Pressing unit; 16. Pressing groove; 18. Lower convex platform; 19. Annular groove; 20. Film winding cylinder; 21. Thrust rod; 22. Communication hole; 23. Docking drive member; 24. Card slot; 25. Rotating rod; 26. Fixed foot plate; 27. Resisting plate; 28. Bracket; 29. Upper film; 30. Bottom film; 31. Built-in air pipe; 32. Sleeve opening; 33. Annular pressing plate. Specific embodiments

[0040] Next, in combination with the accompanying drawings and specific embodiments, the present invention will be further described. It should be noted that, on the premise of no conflict, any combination of the following-described embodiments or technical features can form a new embodiment.

[0041] Embodiment: Refer to Figure 1 - Figure 7 , a yellow slurry water treatment facility based on black film pond fermentation technology proposed in this solution includes a number of independent fermentation tanks 1. A layer of bottom film 30 is provided closely against the pool wall inside the fermentation tank 1, and a pressing mechanism I for pressing the bottom film 30 is arranged at the top of the fermentation tank 1. The fermentation tank 1 can be formed by welding stainless steel plates and steel frames, and its size is selected according to actual conditions. Specifically, a square pool body with specifications of 5m×5m and 7.5m×7.5m is preferably used during actual operation, and the width of the working surface around the top of the pool should be greater than 1m.

[0042] The pressing mechanism I includes a movable platen 2 and a lifting unit for driving the lifting of the movable platen 2. The movable platen 2 is used to press the edge of the bottom film 30 against the top of the fermentation tank 1. An annular groove 19 is provided inside the inner circle of the movable platen 2, and a film winding cylinder 20 is arranged in the annular groove 19. A black film is wound on the film winding cylinder 20. The black film is made of HDPE or LDPE. After the film wound on the film winding cylinder 20 is unfolded, it forms an upper film 29 and can seal the top of the fermentation tank 1. A fermentation space is formed between the upper film 29 and the bottom film 30. And a pressing mechanism II for pressing the upper film 29 against the top of the fermentation tank 1 is movably arranged on the movable platen 2.

[0043] A plurality of air outlet holes 14 are opened on the inner wall of the fermentation tank 1, and notches corresponding to the air outlet holes 14 are opened on the bottom film 30. A gas guiding mechanism communicating with the air outlet holes 14 is further arranged in the fermentation tank 1 to guide the biogas formed in the fermentation space. In the present invention, through a plurality of independently arranged fermentation tanks 1, the number of fermentation tanks 1 can be increased or decreased according to the waste water volume. The fermentation tanks 1 can be spliced with each other to form a black film tank treatment system composed of a plurality of fermentation tanks 1. And a pressing mechanism I and a pressing mechanism II are arranged on the top of the fermentation tank 1, so as to facilitate quickly laying and fixing the bottom film 30 and the upper film 29 in the fermentation tank 1. At the same time, the sealing effect is good after pressing, and it is easy for the yellow pulp water to ferment.

[0044] As an optional implementation manner of the present invention, the cross-section of the fermentation tank 1 is square (a rectangle or a circle can also be selected, but if a circular tank body is used, it cannot be closely spliced, so a buffer zone can be left between the fermentation tanks 1 to facilitate the movement of personnel). And connection holes 10 are opened at the four corners of the top surface of the fermentation tank 1. An elastic buffer unit is arranged at the inner bottom of the connection holes 10. A connection column 4 corresponding to the connection hole 10 is arranged on the bottom surface of the movable platen 2. Four installation cavities 12 are circumferentially distributed inside the pool wall of the fermentation tank 1. A lifting unit is arranged in each installation cavity 12. And the installation cavity 12 and the adjacent connection hole 10 are communicated through a communication hole 22. A sealing cover plate is detachably installed at the top opening of the installation cavity 12 to facilitate protecting the internal structure.

[0045] Through the above structure in this solution, the connection between the movable platen 2 and the fermentation tank 1 is more reliable, and it is more convenient to install and use.

[0046] In this solution, the lifting unit includes a cross bar 11 movably arranged in the installation cavity 12 and a lifting driving rod 13 fixed in the installation cavity 12 and connected with the cross bar 11. The lifting driving rod 13 can adopt a hydraulic rod, a cylinder or an electric push rod. The cross bar 11 is a hollow rod. Docking rods 9 are respectively movably sleeved at both ends of the cross bar 11. A docking driving member 23 for driving the telescopic movement of the docking rods 9 is arranged in the cross bar 11. The docking driving member 23 can adopt a miniature electric push rod. And the docking rods 9 can movably pass through the communication hole 22. Docking holes 5 for inserting the docking rods 9 are opened on the side wall of the connection column 4.

[0047] Through the lifting drive rod 13 described above, the present invention can effectively lift the movable pressing plate 2 to facilitate pressing it after laying the bottom film 30.

[0048] In this solution, the elastic buffer unit includes a columnar spring and a bearing plate fixed at the top of the columnar spring (the above structure is not shown in the drawings of the present invention, but it does not affect the understanding of this solution by those skilled in the art). The outer diameter of the columnar spring is smaller than the aperture of the connection hole 10, and the top surface of the bearing plate is used to contact the bottom end of the connection column 4. By designing the elastic buffer unit, it can prevent the movable pressing plate 2 from directly pressing on the top of the pool before laying the bottom film 30. In this way, when laying the bottom film 30, the edge of the bottom film 30 can quickly extend between the movable pressing plate 2 and the top of the pool, facilitating the next step of pressing and fixing the bottom film 30.

[0049] Furthermore, a circular lower convex platform 18 is provided on the bottom surface of the movable pressing plate 2, a pressing groove 16 is formed on the top surface of the fermentation tank 1, and the edge of the bottom film 30 is located in the pressing groove 16 and is pressed by the lower convex platform 18. This can further improve the sealing performance of the pressed bottom film 30.

[0050] In this solution, the pressing mechanism two includes a movable frame 7 and a plurality of pressing units 15 circumferentially distributed on the movable pressing plate 2. The movable frame 7 is arranged inside the movable pressing plate 2, and the plurality of pressing units 15 press the movable frame 7 against the top of the pool from above to seal the edge position of the unfolded upper film 29.

[0051] The movable frame 7 in this solution can be made of plastic products, with a lightweight design for convenient construction. At the same time, the longitudinal section of the movable frame 7 can adopt an "I" shape to have good compressive strength, and a layer of anti-slip sealing layer is provided on its bottom surface to better press and seal the edge of the upper film 29. The present invention uses the manually operable pressing mechanism two. On the one hand, it can save costs by avoiding using intelligent control electrical components. On the other hand, since there may be moisture on site, using too many electrical components is likely to cause safety accidents and the electrical components are easily damaged.

[0052] As a further improvement of the above solution, a circular upper convex platform 3 is provided on the top of the movable pressing plate 2. The pressing unit 15 includes a bracket 28 fixed on the upper convex platform 3, a rotating rod 25 rotatably connected to the bracket 28. On the side of the rotating rod 25 close to the movable frame 7, a pressing plate 27 is rotatably provided through a pin shaft, and the bottom surface of the pressing plate 27 can contact the top surface of the movable frame 7. The pressing unit 15 further includes a lifting assembly to lift the end of the rotating rod 25 away from the movable frame 7 upward. Among them, a fixed foot plate 26 is provided at the bottom of the bracket 28, and the fixed foot plate 26 is connected to the upper convex platform 3 through bolts.

[0053] The pressing unit 15 adopted in this solution is convenient to operate. Manually lifting the jacking assembly can jack up each rotating rod 25 on one side, so that the pressing plate 27 presses down on the movable frame 7.

[0054] In this solution, the jacking assembly includes a jacking rod 21. Both ends of the jacking rod 21 are connected with swing arms. The other ends of the swing arms are respectively rotatably connected to the top of the fermentation tank 1, and a clamping groove 24 for clamping the jacking rod 21 is arranged on the bottom surface of the rotating rod 25. With the above-mentioned jacking assembly, the operation is convenient and fast, and the working time can be effectively saved.

[0055] It is worth mentioning that the air guiding mechanism includes an air guiding pipe 6, an internal air pipe 31 arranged in the air outlet hole 14, and a socket 32 arranged at the outer port of the air outlet hole 14. The top end of the air guiding pipe 6 is connected with the movable pressing plate 2. The bottom end of the air guiding pipe 6 passes through the cross bar 11 and extends into the installation cavity 12. A jacking hole is arranged on the side wall of the air guiding pipe 6. One end of the internal air pipe 31 is butted with the jacking hole. The socket 32 is detachably connected with the air outlet hole 14, and the inner end of the socket 32 abuts against the other end of the internal air pipe 31.

[0056] When laying the bottom film 30 in the present invention, an external negative pressure mechanism can be used to pump air out of the installation cavity 12. Since the installation cavity 12 is communicated with the air outlet hole 14, the air in the pool body below the bottom film 30 is sucked away, which is convenient for the bottom film 30 to be tightly adsorbed on the inner wall of the fermentation tank 1.

[0057] The air guiding mechanism proposed by the present invention first places the internal air pipe 31 into the air outlet hole 14 before installing the bottom film 30. After the bottom film 30 is installed, a notch is opened at the position of the air outlet hole 14 through a cutter, and then the socket 32 and the air outlet hole 14 are installed and fixed through the notch, so as to push the internal air pipe 31 to move inward, so that the inner end of the air pipe cooperates with the jacking hole on the air guiding pipe 6, and finally a passage for dredging biogas is formed.

[0058] Furthermore, the socket 32 is a cylinder with a threaded outer wall. The socket 32 is spirally connected with the air outlet hole 14. An annular pressing plate 33 is also arranged on the outside of the socket 32. The annular pressing plate 33 is used to press the bottom film 30 against the pool wall. An air outlet cylinder 8 communicated with the top end of the air guiding pipe 6 is also fixed on the movable pressing plate 2. The air outlet cylinder 8 is used to connect an external gas storage device for receiving biogas. How to store biogas belongs to conventional technical means for those skilled in the art, and the gas storage device will not be introduced too much here.

[0059] The above-mentioned implementation manners are only the preferred implementation manners of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the protection scope required by the present invention.

Claims

1. A yellow pulp water treatment facility based on black film pool fermentation technology, characterized in that: It comprises a plurality of independent fermentation tanks, a bottom film is arranged in the fermentation tank close to the tank wall, and a pressing mechanism 1 for pressing the bottom film is arranged at the top of the fermentation tank; The first pressing mechanism includes a movable pressing plate and a lifting unit for driving the movable pressing plate to lift and lower, and the movable pressing plate is used to press the edge of the bottom film against the top of the fermentation tank; An annular groove is provided in the inner circle of the movable pressing plate, a film roll is provided in the annular groove, the film roll on the film roll forms an upper film after being unfolded and can seal the top of the fermentation tank, a fermentation space is formed between the upper film and the bottom film, and a second pressing mechanism for pressing the upper film against the top of the fermentation tank is movably provided on the movable pressing plate; The inner wall of the fermentation tank is provided with a plurality of air outlet holes, the bottom membrane is provided with notches corresponding to the air outlet holes, and the fermentation tank is also provided with an air guide mechanism connected to the air outlet holes to guide out the biogas formed in the fermentation space; The cross section of the fermentation tank is square, and connecting holes are provided at the four corners of the top surface of the fermentation tank, and an elastic buffer unit is provided at the bottom of the connecting hole. The bottom surface of the movable pressing plate is provided with a connecting column corresponding to the connecting hole. Four installation cavities are distributed circumferentially on the inner pool wall of the fermentation tank, and the lifting unit is provided in each installation cavity, and the installation cavity and the adjacent connecting hole are connected through a connecting hole. The air guide mechanism comprises an air guide tube, a built-in air tube arranged in the air outlet, and a sleeve arranged at the outer end of the air outlet, the top end of the air guide tube is connected to the movable pressure plate, the bottom end of the air guide tube passes through the cross bar and extends into the installation cavity, a plug hole is opened on the side wall of the air guide tube, one end of the built-in air tube is connected to the plug hole, the sleeve is detachably connected to the air outlet, and the inner end of the sleeve is in contact with the other end of the built-in air tube; The sleeve is a cylinder with a threaded outer wall. The sleeve and the air outlet are spirally connected. An annular pressure plate is also provided on the outside of the sleeve. The annular pressure plate is used to press the bottom membrane against the pool wall. An air outlet cylinder connected to the top of the air guide pipe is also fixed on the movable pressure plate. The air outlet cylinder is used to connect to an external gas storage device for receiving biogas.

2. A yellow pulp water treatment facility based on black film pool fermentation technology as claimed in claim 1, characterized in that: The lifting unit includes a cross bar movably arranged in the installation cavity, a lifting drive rod fixed in the installation cavity and connected to the cross bar, the cross bar is hollow, and docking rods are movably sleeved on both ends of the cross bar, a docking drive member for driving the docking rod to extend and retract is arranged in the cross bar, and the docking rod can movably pass through the connecting hole, and a docking hole for plugging with the docking rod is opened on the side wall of the connecting column.

3. The yellow pulp water treatment facility based on black film pool fermentation technology according to claim 1, characterized in that: The elastic buffer unit includes a columnar spring and a pressure plate fixed on the top of the columnar spring. The outer diameter of the columnar spring is smaller than the hole diameter of the connecting hole. The top surface of the pressure plate is used to contact the bottom end of the connecting column.

4. A yellow pulp water treatment facility based on black film pool fermentation technology as claimed in claim 3, characterized in that: The bottom surface of the movable pressing plate is provided with an annular lower boss, the top surface of the fermentation tank is provided with a pressing groove, the edge of the bottom film is located in the pressing groove and is pressed by the lower boss.

5. The yellow pulp water treatment facility based on black film pool fermentation technology according to claim 1, characterized in that: The second clamping mechanism includes a movable frame and a plurality of clamping units circumferentially distributed on the movable pressing plate. The movable frame is arranged on the inner side of the movable pressing plate. The plurality of clamping units press the movable frame against the pool top from above to seal the edge of the unfolded upper mold.

6. A yellow pulp water treatment facility based on black film pool fermentation technology as claimed in claim 5, characterized in that: An annular upper boss is provided on the top of the movable pressure plate, and the clamping unit includes a bracket fixed on the upper boss and a rotating rod rotatably connected to the bracket. A back plate is provided on the side of the rotating rod close to the movable frame through a pin shaft, and the bottom surface of the back plate can contact the top surface of the movable frame. The clamping unit also includes a lifting assembly to lift the end of the rotating rod away from the movable frame upward.

7. A yellow pulp water treatment facility based on black film pool fermentation technology as claimed in claim 6, characterized in that: The lifting assembly includes a push rod, both ends of which are connected to swing arms, the other ends of which are rotatably connected to the top of the fermentation tank, and the bottom surface of the rotating rod is provided with a slot for clamping the push rod.

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