Papermaking wastewater recovery device for papermaking

Abstract

The invention relates to the advanced environmental protection industry, more particularly relates to and belongs to the field of papermaking wastewater recovery, and provides a papermaking wastewater recovery device for papermaking, which comprises a treatment box, two gas storage tanks, a bubble generation mechanism and a water quantity position adjusting cylinder, the treatment box is arranged on a treatment frame, a slag scraping mechanism is arranged on the treatment box, and the two gas storage tanks are arranged on the treatment frame. The treatment box is located between the two gas storage tanks, a gas making mechanism is arranged between each gas storage tank and the slag scraping mechanism, the number of the bubble generating mechanisms is two, the bubble generating mechanisms are in one-to-one correspondence with the gas storage tanks, the bubble generating mechanisms are arranged on the treatment box in a penetrating mode and communicated with the gas storage tanks, and the water quantity position adjusting cylinder is arranged at the bottom of the treatment frame. By means of the technical scheme, the problem that in the prior art, when a papermaking wastewater recycling device for papermaking is used for treating papermaking wastewater, most of the papermaking wastewater is difficult to efficiently and stably treat the wastewater through changes of water quality and water quantity is solved.

Description

Technical Field

[0001] The present invention relates to advanced environmental protection industry, more specifically to the field of papermaking wastewater recovery, and in particular to a papermaking wastewater recovery device for papermaking. Background Art

[0002] In the papermaking industry, a large amount of wastewater is generated during the production process. If this wastewater is discharged directly without effective treatment, the organic matter in it will ferment, oxidize, and decompose, which will consume a large amount of oxygen in the water, causing aquatic organisms such as fish and shellfish to die due to lack of oxygen. Impurities such as bark chips and sawdust in the wastewater sink to the bottom of the water and silt up the riverbed. In addition, toxic and smelly gases continue to be produced during the slow fermentation process, causing serious damage to the ecological environment. At the same time, the papermaking industry is a major consumer of water resources. Improving the recycling efficiency of water resources is crucial to the sustainable development of the industry. In the process of papermaking wastewater recycling and treatment, flotation is a commonly used papermaking wastewater treatment method. Its working principle is to use highly dispersed tiny bubbles as carriers to adhere to pollutants in the wastewater, so that the pollutants float to the water surface due to buoyancy greater than gravity and floating resistance, forming foam, and then use scraping equipment to scrape the foam from the water surface to achieve solid-liquid separation. However, in actual use, the flotation machine in the existing technology has limited adaptability to water quality changes. When the water quality of papermaking wastewater fluctuates greatly, such as when the concentration of pollutants suddenly increases significantly, its treatment effect will be significantly affected. It is difficult to complete the wastewater treatment task stably and efficiently by adjusting the inlet and outlet water volume and controlling the foam removal speed. Secondly, when the inlet and outlet water volume fluctuates significantly, the scraping equipment is difficult to accurately scrape off the foam, which further affects the efficiency and quality of wastewater treatment. Summary of the Invention

[0003] The present invention proposes a papermaking wastewater recovery device for papermaking, which is used to solve the problem raised in the background technology that the papermaking wastewater recovery devices in the prior art are mostly difficult to treat the wastewater efficiently and stably due to changes in water quality and water quantity when treating the wastewater.

[0004] The technical solution of the present invention is as follows: A papermaking wastewater recovery device for papermaking includes a treatment box, an air storage tank, a bubble generating mechanism and a water level adjustment cylinder; The processing box is arranged on the processing frame, and a scraping mechanism is provided on the processing box; There are two gas storage tanks, the processing box is located between the two gas storage tanks, and a gas generating mechanism is provided between each gas storage tank and the scraping mechanism; There are two bubble generating mechanisms, each corresponding to the gas storage tank. The bubble generating mechanism is arranged on the processing box and is connected to the gas storage tank. The water level adjustment cylinder is arranged at the bottom of the processing rack, and one end of the water level adjustment cylinder is penetrated and slidably provided with an adjustment column, and one end of the adjustment column is penetrated and sealed and slidably provided at the bottom of the processing box, and a pneumatic adjustment mechanism capable of adjusting the adjustment column is arranged between the water level adjustment cylinder and the air storage tank.

[0005] On the basis of the above scheme, the scraping mechanism includes a scraping power shaft, a scraping motor and a slag discharge guide trough; There are two scraper power shafts, which are rotatably arranged on the processing box. A scraper assembly is arranged between the two scraper power shafts for transmission. The gas generating mechanism is connected to one end of the scraper power shaft. The scraping motor is installed on one side of the processing box, and the output end of the scraping motor is connected to one end of one of the scraping power shafts; The slag discharge guide groove is arranged on one side of the processing box, and a discharge groove adapted to the slag scraping assembly is opened on one side of the slag discharge guide groove.

[0006] On the basis of the above solution, the scraping assembly includes a chain transmission group and a scraping plate; There are two chain transmission groups, and the transmission is set between the two scraper power shafts; There are a plurality of scraping plates, and the scraping plates are arranged between two chain transmission groups.

[0007] As a preferred technical solution of the present invention, the gas-making mechanism includes a gas-making cylinder, a gas-making rod, a gas-making disk, a three-way gas transmission pipe, an air inlet pipe and an air supply pipe; The gas generating cylinder is arranged on one side of the processing box, and a sealing slider is provided in the gas generating cylinder for sealing and sliding; One end of the gas-generating rod passes through the gas-generating cylinder and is connected to the sealing slider, and the other end is provided with an annular slideway; The aeration disk is arranged on one side of the scraping power shaft, and an eccentric shaft is arranged on the aeration disk at an eccentric position away from the scraping power shaft. The eccentric shaft is located in the annular slideway and can drive the annular slideway to perform linear reciprocating motion; The three-way gas transmission pipe is connected to the end of the gas cylinder away from the gas-making rod; The air intake pipe is connected to the three-way air supply pipe, and an air intake one-way valve is installed on the air intake pipe; The air supply pipe is connected between the three-way air supply pipe and the air storage tank, and a gas supply one-way valve is installed on the air supply pipe.

[0008] On the basis of the above scheme, the bubble generating mechanism includes an exhaust pipe, a bubble generator, a gas flow meter and an exhaust valve; The exhaust pipe is arranged in the processing box through, and one end of the exhaust pipe is connected to the gas storage tank; The bubble generator is connected to the exhaust pipe and is located in the processing box; The gas flow meter is installed on the exhaust pipe; The exhaust valve is installed on the exhaust pipe.

[0009] As a preferred technical solution of the present invention, the pneumatic positioning mechanism includes a positioning pipe and an air release pipe; There are two position adjustment tubes, each corresponding to the gas storage tank. One end of the position adjustment tube is connected to the end of the water volume adjustment cylinder away from the position adjustment column, and the other end is connected to the gas storage tank. Each position adjustment tube is installed with a position adjustment valve. The air release pipe is connected to the end of the water level adjustment cylinder away from the level adjustment column, and an air release valve is installed on the air release pipe.

[0010] On the basis of the above solution, each gas storage tank is equipped with a pressure relief valve, which can discharge excess gas in the gas storage tank into the air.

[0011] Based on the above scheme, the processing box is also connected to a liquid inlet pipe group and a clear liquid discharge pipe. The air inlet pipe group corresponds to the bubble generator. The liquid inlet pipe group is equipped with a liquid inlet regulating valve, and the clear liquid discharge pipe is equipped with a liquid discharge regulating valve.

[0012] On the basis of the above solution, a slag discharge through hole is provided at one end of the processing box away from the air inlet pipe, and a slag discharge cover is detachably sealed on one side of the slag discharge through hole.

[0013] On the basis of the above solution, a foam guide groove is further provided on one side of the processing box, and the foam guide groove is located below the slag discharge guide groove.

[0014] The processing box is also equipped with a connecting rod float liquid level meter capable of performing liquid level detection.

[0015] The beneficial effects of the present invention are: 1. In the present invention, a scraping assembly, a gas-making mechanism and a bubble-generating mechanism are provided, and the scraping motor is started. The output end of the scraping motor can drive the scraping power shaft to rotate, and the scraping plate is driven to transmit by the cooperation of the scraping power shaft and the chain transmission group, so that the scraping plate can be transmitted in the treatment box to scrape off the foam floating on the surface of the wastewater. At the same time, the rotation of the scraping power shaft is used to provide power, and the gas-making rod and the sealing slider are driven to reciprocate in the gas-making cylinder through the gas-making disk, eccentric shaft and other components to realize gas compression and storage. No additional power source is required to drive the gas-making, and the generated gas is stored in the gas storage tank to provide gas source for the bubble-generating mechanism and the pneumatic positioning mechanism, which can not only reduce the dependence on external energy, but also effectively reduce the operating cost.

[0016] 2. The present invention provides a bubble generating mechanism. The gas flow meter and exhaust valve in the bubble generating mechanism can accurately control the amount of bubbles entering the treatment box, ensuring that the bubbles fully react with the wastewater. By introducing bubbles into the treatment box, the combination of pollutants in the wastewater and the bubbles can be promoted, thereby improving the scum formation efficiency. 3. The present invention provides a pneumatic adjustment mechanism. By adjusting the adjustment valve on the adjustment pipe, the amount of gas introduced from the gas storage tank into the water level adjustment cylinder can be controlled, thereby pushing the adjustment column to slide at the bottom of the treatment box, thereby achieving flexible adjustment of the liquid level in the treatment box to meet the treatment needs of wastewater with different water volumes and different pollutant concentrations. 4. In the present invention, the pressure relief valve on the gas storage tank can effectively prevent the gas pressure in the tank from being too high, ensuring the safe operation of the device. The liquid inlet pipe group and the clear liquid discharge pipe on the treatment box facilitate the input of wastewater and the discharge of the purified clear liquid. The flow rate can be accurately controlled by the liquid inlet regulating valve and the liquid discharge regulating valve. The slag discharge through hole and the slag discharge cover are provided to facilitate the cleaning and maintenance of the interior of the treatment box. The foam guide groove is provided to collect and treat the foam generated during the slag discharge process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of a papermaking wastewater recovery device for papermaking according to the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the local enlarged structure at A in the middle; Figure 3 This is a schematic diagram of the structure of the scraping power shaft, scraping motor, chain transmission group and scraping plate in the present invention; Figure 4 It is a schematic structural diagram of a partial cross-section of the gas-generating mechanism of the present invention; Figure 5It is a partial cross-sectional structural diagram of the processing box, gas storage tank, pressure relief valve, bubble generating mechanism and connecting rod float level gauge in the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the local enlarged structure at B in the middle; Figure 7 It is a schematic diagram of the structure of the gas storage tank, pressure relief valve, water level adjustment cylinder, adjustment column and pneumatic adjustment mechanism in the present invention; Figure 8 This is a schematic structural diagram of the overall papermaking wastewater recovery device for papermaking from another angle of the present invention.

[0019] In the figure: 001, scraping mechanism; 002, gas generating mechanism; 003, bubble generating mechanism; 004, pneumatic positioning mechanism; 1. Treatment box; 2. Treatment rack; 3. Gas storage tank; 4. Water level adjustment cylinder; 5. Leveling column; 6. Slag scraper power shaft; 7. Slag scraper motor; 8. Slag discharge guide trough; 9. Chain drive group; 10. Slag scraper plate; 11. Gas cylinder; 12. Sealing slider; 13. Gas rod; 14. Annular slideway; 15. Gas disc; 16. Eccentric shaft; 17. Three-way gas transmission pipe; 18. Inlet pipe; 19. Inlet check valve ; 20. Air supply pipe; 21. Air supply one-way valve; 22. Exhaust pipe; 23. Bubble generator; 24. Gas flow meter; 25. Exhaust valve; 26. Position adjustment pipe; 27. Position adjustment valve; 28. Air release pipe; 29. ​​Air release valve; 30. Pressure relief valve; 31. Liquid inlet pipe group; 32. Clear liquid discharge pipe; 33. Liquid inlet regulating valve; 34. Liquid discharge regulating valve; 35. Slag discharge cover; 36. Foam guide trough. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0021] Example 1, as Figures 1 to 8 As shown, the wastewater recovery device of the present invention belongs to the advanced environmental protection industry and provides a papermaking wastewater recovery device for papermaking, including a processing box 1, an air storage tank 3, a bubble generating mechanism 003 and a water level adjustment cylinder 4.

[0022] As mentioned above, the processing box 1 is arranged on the processing frame 2, and the processing box 1 is provided with a scraping mechanism 001, the scraping mechanism 001 includes a scraping power shaft 6, a scraping motor 7 and a slag discharge guide groove 8, there are two scraping power shafts 6, and they are rotatably arranged on the processing box 1, and a scraping assembly is transmitted between the two scraping power shafts 6, the gasification mechanism 002 is connected to one end of the scraping power shaft 6, the scraping motor 7 is installed on one side of the processing box 1, and the output end of the scraping motor 7 is connected to one end of one of the scraping power shafts 6, the slag discharge guide groove 8 is arranged on one side of the processing box 1, and a discharge trough adapted to the scraping assembly is opened on one side of the slag discharge guide groove 8.

[0023] Among them, the scraping assembly includes a chain transmission group 9 and a scraping plate 10. There are two chain transmission groups 9, and the transmission is set between the two scraping power shafts 6. There are several scraping plates 10, and the scraping plates 10 are set between the two chain transmission groups 9.

[0024] Specifically, the scraping motor 7 is started, and the output end of the scraping motor 7 can drive the scraping power shaft 6 connected thereto to rotate. Through the rotation of the scraping power shaft 6, the chain transmission group 9 can be driven to drive the scraping plate 10 to transmit. The transmission of the scraping plate 10 can timely remove the scum in the wastewater, and the scum can be discharged in an orderly manner through the scum discharge guide groove 8, so as to avoid the accumulation of scum on the water surface and affect the treatment effect.

[0025] As mentioned above, there are two gas storage tanks 3, and the processing box 1 is located between the two gas storage tanks 3. A gas-making mechanism 002 is provided between each gas storage tank 3 and the scraping mechanism 001. The gas-making mechanism 002 includes a gas-making cylinder 11, a gas-making rod 13, a gas-making disk 15, a three-way gas transmission pipe 17, an air inlet pipe 18 and an air supply pipe 20. The gas-making cylinder 11 is provided on one side of the processing box 1. A sealing slider 12 is provided in the gas-making cylinder 11 for sealing and sliding. One end of the gas-making rod 13 passes through the gas-making cylinder 11 and is connected to the sealing slider 12. The other end is provided with an annular slide 14. The gas-making disk 15 It is arranged on one side of the scraping power shaft 6, and the gas-making disk 15 is rotated at an eccentric position away from the scraping power shaft 6 on one side with an eccentric shaft 16. The eccentric shaft 16 is located in the annular slide 14 and can drive the annular slide 14 to perform linear reciprocating motion. The three-way gas pipe 17 is connected and arranged at one end of the gas-making cylinder 11 away from the gas-making rod 13. The air intake pipe 18 is connected and arranged on the three-way gas pipe 17. An air intake check valve 19 is installed on the air intake pipe 18. The air supply pipe 20 is connected and arranged between the three-way gas pipe 17 and the gas storage tank 3. A air supply check valve 21 is installed on the air supply pipe 20.

[0026] Specifically, when the scraper power shaft 6 rotates, the scraper power shaft 6 can drive the gas making disk 15 to rotate, and the rotation of the gas making disk 15 can drive the eccentric shaft 16 to move. When the eccentric shaft 16 moves in the annular slide 14, the eccentric shaft 16 can drive the annular slide 14 to perform linear reciprocating motion. The movement of the annular slide 14 can drive the gas making rod 13 to move. The movement of the gas making rod 13 can drive the sealing slider 12 to perform linear reciprocating motion in the gas making cylinder 11. When the sealing slider 12 moves toward the end away from the three-way gas supply pipe 17, the outside gas can enter the gas making cylinder 11 through the air inlet pipe 18 and the air inlet one-way valve 19. When the sealing slider 12 moves toward the end close to the three-way gas supply pipe 17, the gas in the gas making cylinder 11 will be compressed into the gas storage tank 3 through the gas supply pipe 20 and the gas supply one-way valve 21, compressing and storing the gas.

[0027] As mentioned above, there are two bubble generating mechanisms 003, and the bubble generating mechanisms 003 correspond to the gas storage tanks 3 one by one. The bubble generating mechanism 003 is arranged throughout the processing box 1 and is connected to the gas storage tank 3. The bubble generating mechanism 003 includes an exhaust pipe 22, a bubble generator 23, a gas flow meter 24 and an exhaust valve 25. The exhaust pipe 22 is arranged throughout the processing box 1, and one end of the exhaust pipe 22 is connected to the gas storage tank 3. The bubble generator 23 is connected and arranged on the exhaust pipe 22. The bubble generator 23 is located in the processing box 1, the gas flow meter 24 is installed on the exhaust pipe 22, and the exhaust valve 25 is installed on the exhaust pipe 22.

[0028] Specifically, by opening the exhaust valve 25, the gas in the gas storage tank 3 can be discharged from the bubble generator 23 through the exhaust pipe 22. By setting the gas flow meter 24 and the exhaust valve 25 to accurately control the amount of bubbles introduced into the treatment box 1, it can be ensured that the bubbles and the wastewater fully react. By introducing bubbles into the treatment box 1, the combination of pollutants and bubbles in the wastewater can be promoted, and the scum formation efficiency can be improved. The bubble generator 23 is a common device for generating bubbles in the prior art. The specific structure is not the main innovation of the present invention, and its structure will not be described in detail here.

[0029] As mentioned above, the water level adjusting cylinder 4 is arranged at the bottom of the processing frame 2, and one end of the water level adjusting cylinder 4 is penetrated and slidably provided with an adjusting column 5, and one end of the adjusting column 5 is penetrated and sealed and slidably provided at the bottom of the processing box 1, and a pneumatic adjusting mechanism 004 capable of adjusting the adjusting column 5 is provided between the water level adjusting cylinder 4 and the gas storage tank 3. The pneumatic adjusting mechanism 004 includes an adjusting tube 26 and an air release tube 28. There are two adjusting tubes 26, and the adjusting tubes 26 correspond one to one with the gas storage tank 3. One end of the adjusting tube 26 is connected to the end of the water level adjusting cylinder 4 away from the adjusting column 5, and the other end is connected and provided on the gas storage tank 3. A adjusting valve 27 is installed on each adjusting tube 26, and an air release tube 28 is connected and provided at the end of the water level adjusting cylinder 4 away from the adjusting column 5, and an air release valve 29 is installed on the air release tube 28.

[0030] Specifically, by adjusting the adjusting valve 27 on the adjusting tube 26, the amount of gas introduced from the gas storage tank 3 into the water level adjusting cylinder 4 can be controlled, thereby pushing the adjusting column 5 to slide at the bottom of the treatment box 1. By squeezing the space inside the treatment box 1 by the adjusting column 5, the liquid level height in the treatment box 1 can be flexibly adjusted, which can not only adapt to the wastewater treatment needs of different water volumes and different pollutant concentrations, but also ensure that the scraper plate 10 is always in contact with the generated foam, and there will be no excessively deep or shallow foam scraping.

[0031] It is further explained that each gas storage tank 3 is equipped with a pressure relief valve 30, which can discharge excess gas in the gas storage tank 3 into the air. The pressure relief valve 30 on the gas storage tank 3 can effectively prevent the gas pressure in the tank from being too high, thereby ensuring the safe operation of the device.

[0032] As mentioned above, the treatment box 1 is also connected to a liquid inlet pipe group 31 and a clear liquid discharge pipe 32, the air inlet pipe group 18 corresponds to the bubble generator 23, the liquid inlet pipe group 31 is installed with a liquid inlet regulating valve 33, and the clear liquid discharge pipe 32 is installed with a liquid discharge regulating valve 34. The liquid inlet pipe group 31 and the clear liquid discharge pipe 32 on the treatment box 1 are used to facilitate the input of wastewater and the discharge of purified clear liquid. At the same time, by adjusting the liquid inlet regulating valve 33 and the liquid discharge regulating valve 34, the flow rate can be precisely controlled to adapt to the wastewater treatment needs of different water volumes and different pollutant concentrations.

[0033] As mentioned above, a slag discharge hole is provided at one end of the processing box 1 away from the air inlet pipe 18, and a slag discharge cover 35 is provided on one side of the slag discharge hole in a sealed and detachable manner. By providing the slag discharge hole and the slag discharge cover 35, it is convenient to clean and maintain the interior of the processing box 1.

[0034] As mentioned above, a foam guide groove 36 is also provided on one side of the treatment box 1, and the foam guide groove 36 is located below the slag discharge guide groove 8. By providing the foam guide groove 36, the foam generated during the slag discharge process can be collected and processed, and the treatment box 1 is also equipped with a connecting rod float level gauge that can perform liquid level detection. Through the connecting rod float level gauge, the liquid level in the treatment box 1 can be accurately detected, so that the scraping mechanism 001 and the pneumatic positioning mechanism 004 can flexibly adjust the liquid level of the wastewater and the height of the foam generated.

[0035] Example 2: Based on Example 1, Example 2 of the present invention proposes a papermaking wastewater recovery device. The specific working process is as follows: 1. Wastewater input: Open the liquid inlet regulating valve 33 on the liquid inlet pipe group 31, and input the papermaking wastewater into the treatment box 1 through the liquid inlet pipe group 31. During the input process, the input flow of the wastewater can be accurately controlled by adjusting the liquid inlet regulating valve 33 according to the treatment requirements. At the same time, the liquid level in the treatment box 1 is monitored in real time through the connecting rod float level gauge installed on the treatment box 1, so that the liquid level height can be adjusted later. Second, bubbles occur during the synchronous operation of scraping. When a certain amount of wastewater is input into the treatment box 1, the scraping motor 7 is started. The output end of the scraping motor 7 drives a scraping power shaft 6 connected to it to rotate. Since the two scraping power shafts 6 are connected through a chain transmission group 9, the other scraping power shaft 6 also rotates. When the chain transmission group 9 rotates, it drives a number of scraping plates 10 arranged between the two chain transmission groups 9 to transmit. At the same time, when the scraping power shaft 6 rotates, it will drive the aeration disk 15 on one side to rotate. When 15 rotates, the eccentric shaft 16 at the eccentric position on the side away from the scraping power shaft 6 moves in the annular slide 14 at one end of the gas making rod 13, thereby driving the annular slide 14 to perform linear reciprocating motion, and then driving the gas making rod 13 to move. The movement of the gas making rod 13 prompts the sealing slider 12 to perform linear reciprocating motion in the gas making cylinder 11. When the sealing slider 12 moves toward the end away from the three-way gas supply pipe 17, the external gas enters the gas making cylinder 11 through the air inlet pipe 18 and the air inlet check valve 19. When the sealing slider 12 moves toward the end close to the three-way gas supply pipe 17, the external gas enters the gas making cylinder 11 through the air inlet pipe 18 and the air inlet check valve 19. During movement, the gas in the gas cylinder 11 is compressed into the gas storage tank 3 through the gas supply pipe 20 and the gas supply one-way valve 21, realizing the compression and storage of the gas. After the gas is stored in the gas storage tank 3, the exhaust valve 25 on the exhaust pipe 22 in the bubble generating mechanism 003 is opened, and the gas in the gas storage tank 3 is transported to the bubble generator 23 through the exhaust pipe 22. After being processed by the bubble generator 23, it is discharged into the wastewater in the treatment box 1 in the form of bubbles. In this process, the amount of bubbles introduced can be accurately monitored by the gas flow meter 24 installed on the exhaust pipe 22, and the result is as follows: The exhaust valve 25 is adjusted to ensure that the bubbles are in full contact with the wastewater, so that the bubbles adhere to the pollutants in the wastewater, and the pollutants float to the water surface because the buoyancy is greater than the gravity and the floating resistance, forming foam. The generated foam can be pushed to the slag discharge guide groove 8 on one side of the treatment box 1 through the movement of the scraper plate 10, and the slag is discharged in an orderly manner through the discharge trough on the slag discharge guide groove 8 that is compatible with the scraper assembly. During the slag discharge process, the foam guide groove 36 set on one side of the treatment box 1 is located below the slag discharge guide groove 8, which can collect and process the foam generated during the slag discharge process. 3. Liquid level adjustment: According to the height of the liquid level in the treatment tank 1 detected by the connecting rod float level gauge and the actual needs of the wastewater treatment process, the liquid level in the treatment tank 1 is adjusted by the pneumatic positioning mechanism 004.

[0036] The specific operations are as follows: Adjust the adjusting valve 27 on the adjusting pipe 26 to control the amount of gas introduced from the gas storage tank 3 into the water level adjusting cylinder 4. After the gas enters the water level adjusting cylinder 4, it pushes the adjusting column 5 to slide at the bottom of the treatment box 1. The squeezing of the space inside the treatment box 1 by the adjusting column 5 will change the liquid level height in the treatment box 1. Through such adjustment, it can not only adapt to the wastewater treatment needs of different water volumes and different pollutant concentrations, but also ensure that the scraper plate 10 is always in contact with the generated foam to ensure the scraping effect. If it is necessary to reduce the air pressure in the water level adjusting cylinder 4, the air release valve 29 on the air release pipe 28 can be opened to discharge the gas. 4. Clear liquid discharge: After the wastewater has undergone a series of treatments in the treatment box 1, the scum is removed, and the pollutants and bubbles fully react, the discharge control valve 34 on the clear liquid discharge pipe 32 is opened to discharge the purified clear liquid through the clear liquid discharge pipe 32. During the discharge process, the discharge flow rate of the clear liquid can be controlled by adjusting the discharge control valve 34. 5. Device maintenance: When the processing work is completed or the inside of the processing box 1 needs to be cleaned and maintained, close the relevant valves and motors, open the slag discharge cover 35 on one side of the slag discharge through hole, and clean the inside of the processing box 1. After cleaning, replace the slag discharge cover 35 to prepare for the next processing work.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A papermaking wastewater recovery device for papermaking, characterized in that: include: A processing box (1) is arranged on the processing frame (2), and a scraping mechanism (001) is provided on the processing box (1); There are two gas storage tanks (3), the processing box (1) is located between the two gas storage tanks (3), and a gas-generating mechanism (002) is provided between each gas storage tank (3) and the scraping mechanism (001); There are two bubble generating mechanisms (003), each corresponding to the gas storage tank (3). The bubble generating mechanisms (003) are arranged on the processing box (1) and are connected to the gas storage tank (3). A water level adjustment cylinder (4) is arranged at the bottom of the processing frame (2), one end of the water level adjustment cylinder (4) is penetrated and slidably provided with an adjustment column (5), one end of the adjustment column (5) is penetrated and sealed and slidably provided at the bottom of the processing box (1), and a pneumatic adjustment mechanism (004) capable of adjusting the adjustment column (5) is provided between the water level adjustment cylinder (4) and the air storage tank (3).

2. A papermaking wastewater recovery device for papermaking according to claim 1, characterized in that: The scraping mechanism (001) comprises: There are two scraper power shafts (6) which are rotatably arranged on the processing box (1); a scraper assembly is provided between the two scraper power shafts (6); and the gas generating mechanism (002) is connected to one end of the scraper power shaft (6); A scraping motor (7) is installed on one side of the processing box (1), and an output end of the scraping motor (7) is connected to one end of one of the scraping power shafts (6); A slag discharge guide groove (8) is provided on one side of the processing box (1), and a discharge groove adapted to the slag scraping assembly is provided on one side of the slag discharge guide groove (8).

3. A papermaking wastewater recovery device for papermaking according to claim 2, characterized in that: The scraping assembly comprises: Two chain transmission groups (9) are provided, and the transmission is arranged between the two scraper power shafts (6); A plurality of scraper plates (10) are provided, and the scraper plates (10) are arranged between the two chain transmission groups (9).

4. A papermaking wastewater recovery device for papermaking according to claim 3, characterized in that: The gas-generating mechanism (002) comprises: An aeration cylinder (11) is provided on one side of the processing box (1), and a sealing slider (12) is provided inside the aeration cylinder (11) for sealing and sliding; An aeration rod (13), one end of which passes through the aeration cylinder (11) and is connected to the sealing slider (12), and the other end of which is provided with an annular slideway (14); An aeration disk (15) is provided on one side of the scraping power shaft (6), and an eccentric shaft (16) is provided on the aeration disk (15) so as to rotate away from an eccentric position on one side of the scraping power shaft (6). The eccentric shaft (16) is located in the annular slideway (14) and can drive the annular slideway (14) to perform linear reciprocating motion; A three-way gas transmission pipe (17) connected to one end of the gas cylinder (11) away from the gas rod (13); An air intake pipe (18) is connected to the three-way air delivery pipe (17), and an air intake check valve (19) is installed on the air intake pipe (18); An air supply pipe (20) is provided between the three-way air supply pipe (17) and the air storage tank (3), and an air supply check valve (21) is installed on the air supply pipe (20).

5. The papermaking wastewater recovery device according to claim 4, characterized in that: The bubble generating mechanism (003) comprises: An exhaust pipe (22) is provided through the processing box (1), and one end of the exhaust pipe (22) is connected to the gas storage tank (3); a bubble generator (23) connected to the exhaust pipe (22), wherein the bubble generator (23) is located in the processing box (1); A gas flow meter (24) is installed on the exhaust pipe (22); An exhaust valve (25) is installed on the exhaust pipe (22).

6. A papermaking wastewater recovery device for papermaking according to claim 5, characterized in that: The pneumatic positioning mechanism (004) comprises: Two position-adjusting tubes (26) are provided, and the position-adjusting tubes (26) correspond to the gas storage tanks (3) on a one-to-one basis. One end of the position-adjusting tube (26) is connected to an end of the water level adjustment cylinder (4) away from the position-adjusting column (5), and the other end is connected to and arranged on the gas storage tank (3). A position-adjusting valve (27) is installed on each of the position-adjusting tubes (26); An air release pipe (28) is connected to an end of the water level adjustment cylinder (4) away from the level adjustment column (5), and an air release valve (29) is installed on the air release pipe (28).

7. A papermaking wastewater recovery device for papermaking according to claim 6, characterized in that: Each of the gas storage tanks (3) is equipped with a pressure relief valve (30) capable of discharging excess gas in the gas storage tank (3) into the air.

8. The papermaking wastewater recovery device according to claim 7, characterized in that: The processing box (1) is also connected to a liquid inlet pipe group (31) and a clear liquid discharge pipe (32), the air inlet pipe (18) group corresponds to the bubble generator (23), the liquid inlet pipe group (31) is installed with a liquid inlet regulating valve (33), and the clear liquid discharge pipe (32) is installed with a liquid discharge regulating valve (34).

9. The papermaking wastewater recovery device for papermaking according to claim 8, characterized in that: A slag discharge through hole is provided at one end of the processing box (1) away from the air inlet pipe (18), and a slag discharge cover (35) is provided on one side of the slag discharge through hole in a sealed and detachable manner.

10. The papermaking wastewater recovery device according to claim 9, characterized in that: A foam guide groove (36) is further provided on one side of the processing box (1), and the foam guide groove (36) is located below the slag discharge guide groove (8).

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