Industrial sewage purification device for environmental protection engineering

Through the introduction of pressure filtering technology and rotating contact methods in the sewage purification device, the problem of slow sewage filtration speed and low purification efficiency in existing technologies have been solved, and more efficient sewage filtration and disinfection effects are achieved.

CN222411166UActive Publication Date: 2025-01-28ANHUI JIANDA ENVIRONMENTAL TECH CO LTD

Patent Information

Application Number
CN202421224760.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-31
Publication Date
2025-01-28
Estimated Expiration
2034-05-31

AI Technical Summary

Technical Problem

When filtration and purification of existing industrial sewage purification devices for environmental protection engineering, they rely on gravity filtration and have a small pressure, resulting in a slow filtration rate, affecting the sewage purification efficiency.

Method used

Design a sewage purification device including purification box and disinfection box, drive the water inlet rotation by active cone tooth rotation, and use the first piston and thread board to drive the first piston to move to move. , Improve the filtration speed. At the same time, through the rotation of the infusion pipe and the diversion tube, the full contact between the disinfection agent and the sewage is promoted, and the purification effect is improved.

Benefits of technology

By pressure -filtering technology, the sewage filtration speed is significantly improved, the filtration residue blockage is avoided, the purification efficiency of sewage is enhanced, and the sewage disinfection effect is improved through full disinfection agent contact with sewage.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222411166U_ABST
    Figure CN222411166U_ABST
Patent Text Reader

Abstract

The utility model discloses an industrial sewage purification device for environmental protection engineering, and relates to the technical field of sewage purification. The device comprises a base, the top of the base is provided with a purification box and a disinfection box, the top of the purification box is provided with a first piston box and a water inlet pipe, one side of the first piston box is provided with an air inlet pipe and an exhaust pipe, and a first transmission bevel gear rotates to enable a first reciprocating lead screw to rotate, so that a threaded plate drives a first piston rod to reciprocate; when the first piston plate moves rightwards, the air inlet pipe can extract external air, and when the first piston plate moves leftwards, the air is exhausted into the purification box through the exhaust pipe, so that the purpose of pressurizing the interior of the purification box is achieved. In addition, when the water inlet pipe rotates, a material scraping strip can rotate, and the material scraping strip rotates to stir filter residues on a filter screen.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of sewage purification, in particular to an industrial sewage purification device for environmental protection engineering. Background Art

[0002] Environmental protection projects refer to projects specifically done for environmental protection. Due to environmental pollution caused by industrial development, these projects are based on a set of assumed goals, apply relevant scientific knowledge and technical means, and use a group of people's organized activities to deal with and solve environmental pollution problems. The content of environmental protection projects mainly includes air pollution prevention and control projects, water pollution prevention and control projects, solid waste treatment and utilization projects, and noise control projects.

[0003] The prior art discloses an industrial wastewater purification device for environmental protection projects with application number CN202021928595.4. The utility model has a simple structure and is easy to operate. It can clean up the filter residue produced by filtration and avoid clogging of the filter plate causing the device to terminate abnormally. However, during filtering and purification, it only relies on the gravity of the sewage for filtration, and the pressure is relatively low. In addition, the clogging of the residue on the filter screen results in a slow filtration speed, which affects the purification efficiency of the sewage. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide an industrial sewage purification device for environmental protection engineering to solve the technical problems in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an industrial sewage purification device for environmental protection engineering, comprising a base, a purification box and a disinfection box are arranged on the top of the base, a first piston box and a water inlet pipe are arranged on the top of the purification box, and an air inlet pipe and an exhaust pipe are respectively arranged on one side of the first piston box, a first reciprocating screw is installed on one side of the first piston box, a first threaded plate is arranged on the outer surface of the first reciprocating screw, a first piston rod extending to the inside of the first piston box is fixed on one side of the first threaded plate, a first piston plate is fixed on one end of the first piston rod, a first driven bevel gear is fixed on one end of the first reciprocating screw, a first bevel gear disk is arranged on the outer surface of the water inlet pipe, the top end of the water inlet pipe is connected to a sewage pipe through a first rotating joint, a scraper strip is fixed to the lower part of the outer surface of the water inlet pipe through a connecting rod, and a diverter plate is fixed on the inner side of the connecting rod;

[0006] A second piston box is provided on the top of the disinfection box, a second reciprocating screw is installed on one side of the second piston box, a second driven bevel gear is fixed to one end of the second reciprocating screw, a second threaded plate is provided on the outer surface of the second reciprocating screw, a second piston rod is fixed to one side of the second threaded plate, a second piston plate is fixed to one end of the second piston rod, a liquid storage tank is provided on one side of the second piston box, an infusion tube is provided inside the disinfection box, a shunt tube is provided on the outer surface of the infusion tube, a second bevel gear disk is provided above the outer surface of the infusion tube, a liquid extraction tube and a liquid outlet tube are respectively connected to one side of the second piston box, and one end of the liquid outlet tube is connected to the infusion tube through a second rotating joint;

[0007] A transmission shaft is provided on the top of the purification box and the disinfection box, and driving bevel teeth are provided at both ends of the transmission shaft. A driven gear is provided in the middle of the outer surface of the transmission shaft. A motor is installed on one side of the disinfection box, and the output end of the motor is connected to the driving gear.

[0008] Furthermore, a water pump is installed in the middle of the top of the base, and the water inlet end of the water pump is connected to the purification box, and the water outlet end of the water pump is connected to the disinfection box through a connecting pipe.

[0009] By adopting the above technical solution, the water pump draws the filtered and purified sewage into the disinfection box for disinfection treatment.

[0010] Furthermore, a filter screen and a purification layer are provided inside the purification box, and the bottom of the scraper strip is in contact with the filter screen.

[0011] By adopting the above technical solution, the filter can filter larger impurities in the sewage, the purification layer can purify fine impurities in the sewage, and the scraper bar can stir the filter residue on the filter to prevent the filter residue from clogging the filter and causing a low filtration rate.

[0012] Furthermore, an automatic pressure relief valve is provided on one side of the top of the purification box.

[0013] By adopting the above technical solution, when the pressure in the purification box reaches the threshold value, the automatic pressure relief valve can automatically exhaust and relieve pressure.

[0014] Furthermore, the outer surfaces of the air inlet pipe and the exhaust pipe are both provided with one-way valves.

[0015] By adopting the above technical solution, the flow direction of the air can be controlled by using a one-way valve.

[0016] Furthermore, a sealing door and a control panel are provided on the outer surface of the purification box, and the control panel is electrically connected to the motor and the water pump.

[0017] By adopting the above technical solution, during operation, the staff can control the motor and the water pump through the control panel. When the work is completed, the staff can open the sealed door to inspect and maintain the interior.

[0018] Furthermore, the outer surfaces of the disinfection box and the liquid storage box are both provided with observation windows.

[0019] By adopting the above technical solution, the staff can check the disinfection status in the disinfection box and the disinfectant stock in the liquid storage tank through the observation window.

[0020] Furthermore, the diverter pipes are provided in a plurality of groups, and the diverter pipes in the plurality of groups are arranged equidistantly from top to bottom.

[0021] By adopting the above technical solution, the disinfectant can be input into the sewage from top to bottom, so that the disinfectant and sewage can be in contact more fully, and sewage at different depths can be stirred to accelerate the reaction rate.

[0022] Furthermore, the shunt tube is connected to the infusion tube, and a plurality of through holes are provided on the outer surface of the shunt tube.

[0023] By adopting the above technical solution, several groups of through holes can evenly disperse and spray out the disinfectant, further improving the adequacy of the contact between the disinfectant and the sewage.

[0024] Furthermore, the lower parts of the purification box and the disinfection box are inclined, and a drainage outlet is provided on one side of the disinfection box.

[0025] By adopting the above technical solution, the inclined lower part of the purification box can make the sewage in the purification box gather towards the water pump, making extraction more convenient. The inclined lower part of the disinfection box can make the sewage after disinfection be discharged quickly.

[0026] In summary, the utility model mainly has the following beneficial effects:

[0027] 1. During the filtering process, the active bevel gear rotates to make the first bevel gear plate rotate the water inlet pipe, and then the first driven bevel gear rotates, and the first transmission bevel gear rotates to make the first reciprocating screw rotate, so that the threaded plate drives the first piston rod to move back and forth, and then the first piston plate makes a left and right piston movement in the first piston box. When the first piston plate moves to the right, the air inlet pipe draws in the outside air, and when the first piston plate moves to the left, the air is discharged into the purification box through the exhaust pipe, thereby achieving the purpose of pressurizing the purification box. By pressurizing the purification box, the sewage filtration and purification speed is accelerated, and when the water inlet pipe rotates, the scraper bar rotates, and the rotation of the scraper bar can stir the filter residue on the filter screen, so that the filter residue will not always be blocked on the filter screen, further improving the filtration rate, and when the water inlet pipe discharges the sewage into the purification box, the sewage first contacts the diverter plate, and the diverter plate can disperse the water column, thereby preventing the sewage from flowing too fast and causing deformation and damage to the filter screen due to impact;

[0028] 2. After the sewage is purified by the utility model, the sewage enters the disinfection box, and the active bevel gear causes the second bevel gear plate to drive the infusion tube to rotate, and at the same time causes the second driven bevel gear to rotate, so that the second driven bevel gear drives the second reciprocating screw to rotate, so that the second threaded plate drives the second piston rod to move, and then the second piston plate makes a left and right piston movement in the second piston box. When the second piston plate moves to the left, the liquid extraction tube can extract the disinfectant in the liquid storage tank. When the second piston plate moves to the right, the disinfectant can be input into the infusion tube through the liquid outlet tube, and the disinfectant is then sprayed out from the shunt tube to react with the sewage, thereby improving the contact between the disinfectant and the sewage more evenly. At the same time, the rotation of the infusion tube can drive the shunt tube to rotate, thereby stirring the sewage, making the sewage and the disinfectant react more fully, and further improving the sewage purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the utility model;

[0030] Figure 2 It is a schematic diagram of the cross-sectional structure of the purification box and the disinfection box of the utility model;

[0031] Figure 3 This is a schematic diagram of the water inlet pipe structure of the utility model;

[0032] Figure 4 This is a schematic diagram of the shunt pipe structure of the utility model.

[0033] In the figure: 1, base; 2, purification box; 3, disinfection box; 4, liquid storage box; 5, water inlet pipe; 6, first rotary joint; 7, sewage pipe; 8, first bevel gear plate; 9, first piston box; 10, first reciprocating screw rod; 11, first threaded plate; 12, first piston rod; 13, first driven bevel gear; 14, air inlet pipe; 15, exhaust pipe; 16, transmission shaft; 17, driving bevel gear; 18, driven gear; 19, motor; 20, driving gear; 21, automatic pressure relief valve ; 22. Second piston box; 23. Liquid extraction pipe; 24. Liquid outlet pipe; 25. Second reciprocating screw; 26. Second threaded plate; 27. Second piston rod; 28. Second rotary joint; 29. ​​Liquid infusion pipe; 30. Second bevel gear disc; 31. Second driven bevel gear; 32. Water pump; 33. Connecting pipe; 34. First piston plate; 35. Second piston plate; 36. Diverter pipe; 37. Filter screen; 38. Purification layer; 39. Connecting rod; 40. Diverter plate; 41. Scraper strip. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0035] The following describes an embodiment of the utility model based on its overall structure.

[0036] Embodiment 1: An industrial wastewater purification device for environmental protection engineering, such as Figure 1-Figure 4 As shown, it includes a base 1, a purification box 2 and a disinfection box 3 are provided on the top of the base 1, a first piston box 9 and a water inlet pipe 5 are provided on the top of the purification box 2, and an air inlet pipe 14 and an exhaust pipe 15 are respectively provided on one side of the first piston box 9, and the outer surfaces of the air inlet pipe 14 and the exhaust pipe 15 are provided with a one-way valve, and the flow direction of the air can be controlled by the one-way valve, a first reciprocating screw 10 is installed on one side of the first piston box 9, and a first threaded plate 11 is provided on the outer surface of the first reciprocating screw 10, and a first piston rod 12 extending to the inside of the first piston box 9 is fixed on one side of the first threaded plate 11, a first piston rod 12 is fixed on one end of the first piston rod 12, a first piston plate 34 is fixed on one end of the first reciprocating screw 10, a first driven bevel gear 13 is fixed on one end of the first reciprocating screw 10, a first bevel gear disc 8 is provided on the outer surface of the water inlet pipe 5, and the top of the water inlet pipe 5 is connected to the sewage pipe 7 through the first rotary joint 6, a scraper strip 41 is fixed to the lower part of the outer surface of the water inlet pipe 5 through a connecting rod 39, and a diverter plate 40 is fixed on the inner side of the connecting rod 39;

[0037] A second piston box 22 is provided on the top of the disinfection box 3, a second reciprocating screw rod 25 is installed on one side of the second piston box 22, a second driven bevel gear 31 is fixed to one end of the second reciprocating screw rod 25, a second threaded plate 26 is provided on the outer surface of the second reciprocating screw rod 25, a second piston rod 27 is fixed to one side of the second threaded plate 26, a second piston plate 35 is fixed to one end of the second piston rod 27, a liquid storage box 4 is provided on one side of the second piston box 22, an infusion tube 29 is provided inside the disinfection box 3, a shunt tube 36 is provided on the outer surface of the infusion tube 29, a plurality of groups of shunt tubes 36 are provided, and the plurality of groups of shunt tubes 36 are arranged equidistantly from top to bottom, through The depth of the disinfectant being input into the sewage is set from top to bottom, so that the disinfectant and the sewage are in contact more fully, and the sewage at different depths can be stirred to accelerate the reaction rate. The shunt pipe 36 is connected to the infusion pipe 29, and the outer surface of the shunt pipe 36 is provided with a plurality of groups of through holes, and the plurality of groups of through holes can evenly disperse and spray the disinfectant, further improving the adequacy of the contact between the disinfectant and the sewage. A second bevel gear disc 30 is provided above the outer surface of the infusion pipe 29, and one side of the second piston box 22 is respectively connected with a liquid extraction pipe 23 and a liquid outlet pipe 24, and one end of the liquid outlet pipe 24 is connected to the infusion pipe 29 through a second rotary joint 28;

[0038] A transmission shaft 16 is provided on the top of the purification box 2 and the disinfection box 3, and driving bevel gears 17 are provided at both ends of the transmission shaft 16. A driven gear 18 is provided in the middle of the outer surface of the transmission shaft 16. A motor 19 is installed on the upper side of the disinfection box 3, and the output end of the motor 19 is connected to a driving gear 20.

[0039] See also Figure 1-Figure 2 In the above embodiment, a water pump 32 is installed in the middle of the top of the base 1, and the water inlet end of the water pump 32 is connected to the purification box 2, and the water outlet end of the water pump 32 is connected to the disinfection box 3 through the connecting pipe 33. The water pump 32 draws the filtered and purified sewage into the disinfection box 3 for disinfection.

[0040] See also Figure 2 In the above embodiment, a filter screen 37 and a purification layer 38 are provided inside the purification box 2, and the bottom of the scraper strip 41 is in contact with the filter screen 37. The filter screen 37 can filter larger impurities in the sewage, and the purification layer 38 can purify fine impurities in the sewage. The scraper strip 41 can stir the filter residue on the filter screen 37 to prevent the filter residue from clogging the filter screen 37 and causing a low filtration rate.

[0041] See also Figure 1-Figure 2 In the above embodiment, a sealed door and a control panel are provided on the outer surface of the purification box 2, and the control panel is electrically connected to the motor 19 and the water pump 32. During operation, the staff can control the motor 19 and the water pump 32 through the control panel. When the work is completed, the staff can open the sealed door to inspect and maintain the interior.

[0042] See also Figure 1 In the above embodiment, the outer surfaces of the disinfection box 3 and the liquid storage tank 4 are both provided with observation windows, and the staff can check the disinfection situation in the disinfection box 3 and the disinfectant stock in the liquid storage tank 4 through the observation windows.

[0043] See also Figure 2 In the above embodiment, the lower parts of the purification box 2 and the disinfection box 3 are both inclined, and a drainage port is provided on one side of the disinfection box 3. The lower part of the purification box 2 is inclined so that the sewage in the purification box 2 can be gathered toward the water pump 32, making extraction more convenient. The lower part of the disinfection box 3 is inclined so that the sewage after disinfection can be quickly discharged.

[0044] Embodiment 2: In order to avoid excessive pressure in the purification box and saturation, thereby affecting the motor speed, embodiment 2 is improved on the basis of embodiment 1, see Figure 1-Figure 2 An automatic pressure relief valve 21 is provided on one side of the top of the purification box 2. When the pressure in the purification box 2 reaches a certain threshold, the automatic pressure relief valve 21 can automatically exhaust and release the pressure.

[0045] The implementation principle of the utility model is as follows: during operation, sewage enters through the sewage pipe 7 and the water inlet pipe 5, the diverter plate 40 can disperse the water column, and then the staff starts the motor 19, the motor 19 rotates to rotate the driving gear 20, the driving gear 20 rotates to rotate the driven gear 18, so that the transmission shaft 16 drives the driving bevel gear 17 to rotate, the driving bevel gear 17 rotates to make the first bevel gear plate 8 rotate the water inlet pipe 5, and then the first driven bevel gear 13 rotates, the first transmission bevel gear rotates to make the first reciprocating screw rod 10 rotate The first piston plate 34 is rotated so that the threaded plate drives the first piston rod 12 to move back and forth, thereby causing the first piston plate 34 to make a left and right piston movement in the first piston box 9. When the first piston plate 34 moves to the right, the air inlet pipe 14 draws in external air. When the first piston plate 34 moves to the left, the air is discharged into the purification box 2 through the exhaust pipe 15, thereby achieving the purpose of pressurizing the purification box 2. By pressurizing the purification box 2, the sewage filtering and purification speed is accelerated, and when the water inlet pipe 5 rotates, the scraper strip 41 is rotated, and the rotation of the scraper strip 41 can The filter residue on the filter screen 37 is stirred so that the filter residue will not always be blocked on the filter screen 37. The filtered sewage is then purified through the filter layer, and the purified water is pumped into the disinfection box 3. The sewage enters the disinfection box 3, and the active bevel gear 17 causes the second bevel gear disc 30 to drive the infusion tube 29 to rotate, and at the same time causes the second driven bevel gear 31 to rotate, so that the second driven bevel gear 31 drives the second reciprocating screw rod 25 to rotate, so that the second threaded plate 26 drives the second piston rod 27 to move, and then the second piston plate 35 is in the second active The piston in the plug box 22 makes left and right piston movements. When the second piston plate 35 moves to the left, the suction pipe 23 can extract the disinfectant in the liquid storage box 4. When the second piston plate 35 moves to the right, the disinfectant can be input into the infusion pipe 29 through the outlet pipe 24. The disinfectant is then sprayed out from the shunt pipe 36 to react with the sewage, thereby improving the contact between the disinfectant and the sewage. At the same time, the rotation of the infusion pipe 29 can drive the shunt pipe 36 to rotate, thereby stirring the sewage, so that the sewage and the disinfectant react more fully. After disinfection, the water is discharged from the disinfection box 3.

[0046] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. An industrial wastewater purification device for environmental protection engineering, comprising a base (1), characterized in that: A purification box (2) and a disinfection box (3) are provided on the top of the base (1); a first piston box (9) and a water inlet pipe (5) are provided on the top of the purification box (2); an air inlet pipe (14) and an air exhaust pipe (15) are provided on one side of the first piston box (9); a first reciprocating screw rod (10) is installed on one side of the first piston box (9); a first threaded plate (11) is provided on the outer surface of the first reciprocating screw rod (10); a first threaded plate (11) is fixed on one side of the first threaded plate (11) extending into the interior of the first piston box (9); A piston rod (12), a first piston plate (34) is fixed to one end of the first piston rod (12), a first driven bevel gear (13) is fixed to one end of the first reciprocating screw (10), a first bevel gear disc (8) is provided on the outer surface of the water inlet pipe (5), the top end of the water inlet pipe (5) is connected to a sewage pipe (7) via a first rotary joint (6), a scraper strip (41) is fixed below the outer surface of the water inlet pipe (5) via a connecting rod (39), and a diverter plate (40) is fixed on the inner side of the connecting rod (39); A second piston box (22) is provided on the top of the disinfection box (3), a second reciprocating screw rod (25) is installed on one side of the second piston box (22), a second driven bevel gear (31) is fixed to one end of the second reciprocating screw rod (25), a second threaded plate (26) is provided on the outer surface of the second reciprocating screw rod (25), a second piston rod (27) is fixed to one side of the second threaded plate (26), and a second piston plate (35) is fixed to one end of the second piston rod (27). A liquid storage box (4) is provided on one side of the second piston box (22), a liquid infusion tube (29) is provided inside the disinfection box (3), a shunt tube (36) is provided on the outer surface of the liquid infusion tube (29), a second bevel gear disk (30) is provided above the outer surface of the liquid infusion tube (29), a liquid extraction tube (23) and a liquid outlet tube (24) are respectively connected to one side of the second piston box (22), and one end of the liquid outlet tube (24) is connected to the liquid infusion tube (29) through a second rotary joint (28); A transmission shaft (16) is provided on the top of the purification box (2) and the disinfection box (3), and driving bevel gears (17) are provided at both ends of the transmission shaft (16). A driven gear (18) is provided in the middle of the outer surface of the transmission shaft (16). A motor (19) is installed above one side of the disinfection box (3), and the output end of the motor (19) is connected to a driving gear (20).

2. The industrial wastewater purification device for environmental protection engineering according to claim 1 is characterized in that: A water pump (32) is installed in the middle of the top of the base (1), and the water inlet end of the water pump (32) is connected to the purification box (2), and the water outlet end of the water pump (32) is connected to the disinfection box (3) through a connecting pipe (33).

3. The industrial wastewater purification device for environmental protection engineering according to claim 1 is characterized in that: The purification box (2) is provided with a filter screen (37) and a purification layer (38) inside, and the bottom of the scraper strip (41) is in contact with the filter screen (37).

4. The industrial wastewater purification device for environmental protection engineering according to claim 1 is characterized in that: An automatic pressure relief valve (21) is provided on one side of the top of the purification box (2).

5. The industrial wastewater purification device for environmental protection engineering according to claim 1 is characterized in that: The outer surfaces of the air inlet pipe (14) and the exhaust pipe (15) are both provided with one-way valves.

6. The industrial wastewater purification device for environmental protection engineering according to claim 2 is characterized in that: The outer surface of the purification box (2) is provided with a sealing door and a control panel, and the control panel is electrically connected to the motor (19) and the water pump (32).

7. The industrial wastewater purification device for environmental protection engineering according to claim 1 is characterized by: The outer surfaces of the disinfection box (3) and the liquid storage box (4) are both provided with observation windows.

8. The industrial wastewater purification device for environmental protection engineering according to claim 1 is characterized by: The flow distribution pipes (36) are provided in a plurality of groups, and the plurality of groups of flow distribution pipes (36) are arranged at equal distances from top to bottom.

9. The industrial wastewater purification device for environmental protection engineering according to claim 1, characterized in that: The shunt tube (36) is connected to the infusion tube (29), and the outer surface of the shunt tube (36) is provided with a plurality of groups of through holes.

10. The industrial wastewater purification device for environmental protection engineering according to claim 1, characterized in that: The interiors of the purification box (2) and the disinfection box (3) are both arranged at an inclination, and a drainage outlet is provided on one side of the disinfection box (3).

Citation Information

Patent Citations

  • Industrial sewage purification device for environmental protection engineering

    CN213416521U

Cited By

  • Sewage and wastewater recycling treatment system for laying hen farms

    CN119977112A

  • A wastewater recycling and treatment system for egg-laying chicken farms

    CN119977112B