A multi-stage treatment device for wastewater from packaging paper production

Abstract

This invention relates to a multi-stage wastewater treatment device for packaging paper production, applicable to the field of packaging paper production technology. It includes a pretreatment unit, a biological treatment unit, and a deep treatment unit connected in sequence, and also includes an intelligent sediment detection unit. The intelligent sediment detection unit includes a flow-guiding sediment detection component installed at the end of the raw water pipeline. The flow-guiding sediment detection component includes a transfer box, with an outlet pipe connected to the bottom of the transfer box and an inlet pipe connected to the side wall of the transfer box. A solenoid valve is installed on the inlet pipe. Through the intelligent sediment detection unit, the accumulation of sediment in the connecting pipe can be automatically detected, thereby indirectly detecting the accumulation of sediment in the raw water pipeline. When the sediment accumulation reaches a threshold, it can automatically issue a reminder to relevant personnel, prompting them to clean the pipeline in a timely manner. This effectively avoids problems such as decreased wastewater treatment efficiency, water quality deterioration, and increased treatment difficulty caused by untimely sediment removal.

Description

Technical Field

[0001] This invention relates to a multi-stage wastewater treatment device, and more particularly to a multi-stage wastewater treatment device for packaging paper production applied in the field of packaging paper production technology. Background Technology

[0002] Packaging paper refers to paper used for packaging goods and materials. It typically has high physical strength, low moisture content, low air permeability, and a certain degree of water resistance. Based on its use, it can be divided into ordinary packaging paper, food packaging paper, greaseproof paper, and moisture-proof paper, etc. The production process of packaging paper generates a large amount of wastewater that requires treatment.

[0003] The invention patent with publication number CN118420013B discloses a wastewater treatment device for the production of packaging paper bags. This invention utilizes the bactericidal effect of paper ash to sterilize the wastewater, saving the amount of bactericide used when the next stage of purification system further purifies the wastewater.

[0004] The invention patent with publication number CN104445802B discloses a multi-stage sedimentation treatment system for papermaking wastewater. In this invention, the wastewater undergoes biological sedimentation or fiber filtration more than once, and finally undergoes flocculation sedimentation to meet the standards for reuse and can be transported to the workshop for reuse.

[0005] In treating wastewater from packaging paper production, the first step is usually pretreatment in a pretreatment unit. The main purpose of pretreatment is to remove suspended solids and adjust water quality and quantity. When raw water (untreated wastewater) is transported to the pretreatment unit through the raw water pipeline, sediment easily forms on the inner wall of the pipeline because suspended solids have not yet been removed. This sediment not only affects wastewater treatment efficiency but also easily leads to water quality deterioration and increased treatment difficulty. Therefore, when the sediment in the pipeline accumulates to a certain amount, it needs to be cleaned promptly. However, existing multi-stage wastewater treatment devices generally lack corresponding automatic sediment detection mechanisms, making it difficult to accurately determine the cleaning timing and easily leading to untimely sediment removal. Therefore, we propose a multi-stage wastewater treatment device for packaging paper production. Summary of the Invention

[0006] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that existing multi-stage wastewater treatment devices generally lack corresponding automatic sediment detection mechanisms, making it difficult to accurately determine the timing of cleaning and easily leading to untimely sediment cleaning.

[0007] To address the aforementioned problems, this invention provides a multi-stage treatment device for wastewater from packaging paper production, comprising a pretreatment unit, a biological treatment unit, and a deep treatment unit connected in sequence, and an intelligent volumetric detection unit. The intelligent volumetric detection unit includes a flow-guiding and volumetric detection assembly installed at the end of the raw water pipeline. The flow-guiding and volumetric detection assembly includes a transfer box, with an outlet pipe connected to the bottom of the transfer box and an inlet pipe connected to the side wall of the transfer box. A solenoid valve is installed on the inlet pipe, and a lifting electric push rod is fixedly installed on the inner wall of the top of the transfer box. A top sealing plug matching the outlet pipe is fixedly connected to the output end of the lifting electric push rod. The transfer box is located away from the inlet pipe. A support frame is fixedly installed on the outer side wall, and a push-pull electric push rod is fixedly installed on the support frame. The output end of the push-pull electric push rod is fixedly connected to a bottom sealing plate that matches the outlet pipe. The top of the bottom sealing plate is flush with the bottom end of the outlet pipe. An air guide pipe is embedded through the bottom sealing plate. The bottom end of the air guide pipe is connected to an air cylinder. A control charging magnet is fixedly installed on the inner wall of the bottom end of the air cylinder. Above the control charging magnet is an air inflation piston plate that is slidably and sealingly connected to the inner wall of the air cylinder. A linkage magnet is fixedly connected to the bottom end of the air inflation piston plate. A limit ring is fixedly installed above the air inflation piston plate. A pressure sensor is fixedly installed above the limit ring.

[0008] In the aforementioned multi-stage wastewater treatment device for packaging paper production, the accumulation of sediment in the connecting pipes can be automatically detected, thereby indirectly detecting the accumulation of sediment in the raw water pipes. When the sediment accumulation reaches a threshold, the device can automatically send a reminder to relevant personnel, prompting them to clean the pipes in a timely manner.

[0009] As a further improvement of this application, the end of the inlet pipe away from the transfer box is connected to the raw water pipeline, the pretreatment unit includes a coagulation sedimentation tank, the end of the outlet pipe away from the transfer box faces the coagulation sedimentation tank, the biological treatment unit includes a contact oxidation tank, and the advanced treatment unit includes a membrane bioreactor.

[0010] As a further improvement of this application, the intelligent detection unit also includes a detection intelligent control system, which includes a detection setting module, a detection control module, a detection analysis module, and a remote reminder module. The detection setting module is signal-connected to the detection control module, and the detection control module is signal-connected to the lifting electric push rod, the control charging magnet, the air pressure sensor, and the solenoid valve. The air pressure sensor is signal-connected to the detection analysis module, and the detection analysis module is signal-connected to the remote reminder module.

[0011] As a further improvement of this application, the volume detection intelligent control system also includes a compensation calculation module. The volume detection setting module is signal-connected to the compensation calculation module, and the compensation calculation module is signal-connected to the volume detection analysis module. A temperature sensor is also fixedly installed inside the air cylinder. The volume detection control module is signal-connected to the temperature sensor, and the temperature sensor is signal-connected to the compensation calculation module.

[0012] As a further improvement of this application, a pair of elastic pull ropes are fixedly connected between the bottom end of the inflation piston plate and the inner wall of the bottom end of the inflation cylinder. A matching sealing baffle is fixedly installed inside the transfer box. The top sealing plug passes through the sealing baffle and is slidably sealed to it, and the bottom end of the top sealing plug is flush with the bottom end of the sealing baffle.

[0013] As a further improvement of this application, both the outlet pipe and the inlet pipe penetrate the outer wall of the transfer box and are slidably and sealingly connected to the outer wall of the transfer box. A lower connecting seat is sleeved on the outside of the outlet pipe, and a side connecting seat is sleeved on the outside of the inlet pipe. Both the lower connecting seat and the side connecting seat are fixedly connected to the transfer box, and the outlet pipe is threadedly connected to the lower connecting seat and the inlet pipe is threadedly connected to the side connecting seat.

[0014] As another improvement of this application, a slidable sealing ring is provided on the inner side of the top end of the outlet pipe, and an annular scraper matching the outlet pipe is fixedly connected to the bottom end of the slidable ring. A connecting rope is fixedly connected between the slidable ring and the top sealing plug.

[0015] As a supplement to another improvement of this application, a matching connecting ring is provided on the inner side of the top of the air duct, and a matching intercepting net is fixedly connected to the bottom of the connecting ring. During the detection process, a small amount of sediment may fall downwards, and the intercepting net can prevent the sediment from falling into the air cylinder.

[0016] As a supplement to another improvement of this application, the connecting ring is threadedly connected to the air guide tube, the intercepting net is movably connected to the air guide tube, and a screw rod is fixedly installed on the inner side of the connecting ring, so that the connecting ring and the intercepting net can be removed by rotating the connecting ring with the screw rod, thereby facilitating the cleaning of the deposits on the inner side of the connecting ring.

[0017] As a supplement to another improvement of this application, a cleaning brush is provided on the side of the outlet pipe away from the bottom sealing plate. The cleaning brush is fixedly connected to the outlet pipe through a connecting rod, and the bottom end of the cleaning brush and the top end of the bottom sealing plate are at the same height.

[0018] In summary, this application, through the intelligent sediment detection unit, enables the automatic detection of sediment accumulation within the connecting pipe, thereby indirectly detecting sediment accumulation in the raw water pipeline. When the sediment accumulation reaches a threshold, it automatically alerts relevant personnel, prompting timely pipeline cleaning. This effectively avoids problems such as decreased wastewater treatment efficiency, water quality deterioration, and increased treatment difficulty caused by untimely sediment removal. Furthermore, the intelligent sediment detection unit is equipped with a temperature compensation calculation mechanism, which calculates and adjusts the reference air pressure threshold based on the temperature during detection, eliminating the influence of temperature on the detection results and improving accuracy. The inclusion of a spacer ring and annular scraper prevents sediment on the inner wall of the connecting pipe from affecting the detection process, ensuring the top sealing plug can be smoothly inserted into the connecting pipe and effectively seal the top of the connecting pipe, further improving the accuracy of the detection results. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of the multi-stage treatment device for wastewater from packaging paper production in the first embodiment of this application;

[0020] Figure 2 This is a three-dimensional structural diagram of the flow-guiding and accumulation detection component in the first embodiment of this application;

[0021] Figure 3 This is a front view of the flow-guiding and accumulation detection component in the first embodiment of this application;

[0022] Figure 4 This is a cross-sectional view of the connecting box in the first embodiment of this application;

[0023] Figure 5 This is a cross-sectional view of the air cylinder in the first embodiment of this application;

[0024] Figure 6 This is a system structure block diagram of the intelligent control system for detection and control in the first embodiment of this application;

[0025] Figure 7 This is a three-dimensional structural diagram of the flow-guiding and accumulation detection component in the second embodiment of this application;

[0026] Figure 8 This is a cross-sectional view of the connecting box in the second embodiment of this application;

[0027] Figure 9 This is a cross-sectional view of the top of the connecting pipe in the second embodiment of this application;

[0028] Figure 10 This is a cross-sectional view of the air duct in the second embodiment of this application.

[0029] Explanation of the labels in the diagram:

[0030] 101. Transfer box; 102. Outlet connecting pipe; 103. Inlet connecting pipe; 104. Lifting electric push rod; 105. Top sealing pipe plug; 106. Support frame; 107. Push-pull electric push rod; 108. Bottom sealing plate; 109. Air guide pipe; 110. Air cylinder; 111. Control charging magnet; 112. Inflation piston plate; 113. Linkage magnet; 114. Limit ring; 115. Air pressure sensor; 116. Elastic pull rope; 117. Sealing baffle; 118. Lower connecting seat; 119. Side connecting seat; 120. Temperature sensor; 201. Placement ring; 202. Annular scraper; 203. Connecting rope; 204. Connecting ring; 205. Interception net; 206. Tightening rod; 207. Cleaning brush; 208. Connecting rod. Detailed Implementation

[0031] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0032] First implementation method:

[0033] Figures 1-6 This invention discloses a multi-stage wastewater treatment device for packaging paper production, comprising a pretreatment unit, a biological treatment unit, and a deep treatment unit connected in sequence, and an intelligent flow monitoring unit. The pretreatment unit includes a coagulation sedimentation tank, the biological treatment unit includes a contact oxidation tank, and the deep treatment unit includes a membrane bioreactor. The intelligent flow monitoring unit includes a flow guiding and flow monitoring component installed at the end of the raw water pipeline. The flow guiding and flow monitoring component includes a transfer box 101, with an outlet pipe 102 connected to the bottom of the transfer box 101. The end of the outlet pipe 102 away from the transfer box 101 faces the coagulation sedimentation tank. An inlet pipe 103 is connected to the side wall of the transfer box 101, with the end of the inlet pipe 103 away from the transfer box 101 connected to the raw water pipeline. A solenoid valve is installed on the inlet pipe 103. A lifting electric push rod 104 is fixedly installed on the inner wall of the top of the transfer box 101, and the output end of the lifting electric push rod 104 is fixedly connected to a device matching the outlet pipe 102. The top sealing plug 105, the transfer box 101, has a support frame 106 fixedly installed on the outer wall of the side away from the inlet pipe 103, and a push-pull electric push rod 107 fixedly installed on the support frame 106. The output end of the push-pull electric push rod 107 is fixedly connected to a bottom sealing plate 108 that matches the outlet pipe 102. The top end of the bottom sealing plate 108 is flush with the bottom end of the outlet pipe 102. A vent pipe 109 is embedded through the bottom sealing plate 108. The bottom end is connected to an air cylinder 110. A control charging magnet 111 is fixedly installed on the inner wall of the bottom end of the air cylinder 110. An inflation piston plate 112 is provided above the control charging magnet 111 and is slidably and sealingly connected to the inner wall of the air cylinder 110. A linkage magnet 113 is fixedly connected to the bottom end of the inflation piston plate 112. A limit ring 114 is fixedly installed above the inflation piston plate 112. A pressure sensor 115 is fixedly installed above the limit ring 114.

[0034] The intelligent volume detection unit also includes a volume detection intelligent control system, which includes a volume detection setting module, a volume detection control module, a volume detection analysis module, and a remote reminder module. The volume detection setting module is signal-connected to the volume detection control module, and the volume detection control module is signal-connected to the lifting electric push rod 104, the control charging magnet 111, the air pressure sensor 115, and the solenoid valve. The air pressure sensor 115 is signal-connected to the volume detection analysis module, and the volume detection analysis module is signal-connected to the remote reminder module.

[0035] When treating wastewater from packaging paper production, raw water is sequentially transported to the pretreatment unit via the raw water pipeline, inlet pipe 103, transfer box 101, and outlet pipe 102. The pretreatment unit pre-treats the raw water, and then the biological treatment unit further treats the pre-treated wastewater. Finally, the deep treatment unit performs deep treatment on the wastewater. The material of the outlet pipe 102 is the same as that of the raw water pipeline. Since the raw water is also transported through the outlet pipe 102, sediment will also be generated on the inner wall of the outlet pipe 102. Therefore, the sediment accumulation in the raw water pipeline can be indirectly detected by detecting the sediment accumulation in the outlet pipe 102. According to the actual situation, the detection cycle and reference air pressure threshold are reasonably set through the sediment detection setting module. The sediment detection intelligent control system will periodically control and execute the operation of detecting the sediment accumulation in the outlet pipe 102 according to the monitoring cycle.

[0036] During testing, the volume control module first closes the solenoid valve to stop the delivery of raw water. Then, the volume control module controls the lifting electric push rod 104 to move the top sealing plug 105 downwards until it inserts into the outlet connecting pipe 102, sealing the top of the outlet connecting pipe 102. Simultaneously, the volume control module controls the pushing and pulling electric push rod 107 to push the bottom sealing plate 108 until it moves to the outlet connecting pipe 102, sealing the bottom of the outlet connecting pipe 102. Then, the volume control module controls the charging... When magnet 111 is energized, it applies a magnetic repulsion force to the linkage magnet 113. Under the action of this magnetic repulsion force, the inflation piston plate 112 moves upward until it abuts against the limit ring 114. This upward movement of the inflation piston plate 112 compresses the air above it, causing it to enter the inner side of the outlet pipe 102 through the air guide pipe 109. This increases the air pressure inside the outlet pipe 102. Then, the pressure detection control module activates the air pressure sensor 115 to detect... The air pressure is measured by the air pressure sensor 115, and the air pressure data detected by the sensor is transmitted to the sedimentation analysis module. The amount of sediment in the outlet pipe 102 affects the final air pressure data; the more sediment, the higher the final air pressure data. Therefore, the accumulation of sediment can be determined by analyzing the air pressure data detected by the air pressure sensor 115. The sedimentation analysis module compares the air pressure data detected by the air pressure sensor 115 with a reference air pressure threshold. If the air pressure data is greater than the reference air pressure data, it indicates that a large amount of sediment has accumulated in the outlet pipe 102. Cleaning is required. At this time, the volume analysis module will control the remote reminder module to send reminder information to relevant personnel (the reminder method can be sending SMS, email, etc., and remote reminder is existing technology, which will not be described in detail here). After the detection is completed, the volume control module will control the charging magnet 111 to de-energize, so that the inflation piston plate 112 moves downward to reset, and control the push-pull electric push rod 107 to pull the bottom sealing plate 108 to reset, control the lifting electric push rod 104 to pull the top sealing pipe plug 105 to reset, and close the air pressure sensor 115 and open the solenoid valve.

[0037] Therefore, by setting up an intelligent sediment detection unit, the intelligent sediment detection unit can automatically detect the accumulation of sediment in the connecting pipe 102, thereby indirectly detecting the accumulation of sediment in the raw water pipeline. When the sediment accumulation reaches a threshold, it can automatically send a reminder to relevant personnel, prompting them to clean the pipeline in a timely manner. This can effectively avoid problems such as decreased wastewater treatment efficiency, water quality deterioration, and increased treatment difficulty caused by untimely sediment cleaning.

[0038] The volumetric intelligent control system also includes a compensation calculation module. The volumetric setting module is signal-connected to the compensation calculation module, and the compensation calculation module is signal-connected to the volumetric analysis module. A temperature sensor 120 is also fixedly installed inside the inflation cylinder 110. The volumetric control module is signal-connected to the temperature sensor 120, and the temperature sensor 120 is signal-connected to the compensation calculation module. When setting the reference pressure threshold through the volumetric setting module, a reference temperature corresponding to the reference pressure threshold also needs to be set. During detection, when the volumetric control module activates the pressure sensor 115, it also activates the temperature sensor 120 (after detection, when the volumetric control module deactivates the pressure sensor 115, it also deactivates the temperature sensor 120). The temperature sensor 120 is used to detect temperature, and the detected temperature data is transmitted to the compensation calculation module. The compensation calculation module performs temperature compensation calculations on the reference pressure threshold based on the temperature data detected by the temperature sensor 120, calculating the reference pressure threshold at the current temperature (the compensation calculation module is based on the ideal gas law). Calculate the reference pressure threshold at the current temperature, where: The reference air pressure threshold at the current temperature, For the preset reference air pressure threshold, Reference temperature, The current temperature is used as the reference air pressure threshold at the current temperature, and the calculation results are sent to the volumetric analysis module. When the volumetric analysis module analyzes and judges, it will make an analysis and judgment based on the reference air pressure threshold at the current temperature calculated by the compensation calculation module, thereby eliminating the influence of temperature on the detection results and improving the accuracy of the detection results.

[0039] A pair of elastic pull ropes 116 are fixedly connected between the bottom end of the inflation piston plate 112 and the inner wall of the bottom end of the inflation cylinder 110. The elastic pull ropes 116 facilitate the reset of the inflation piston plate 112. A matching sealing baffle 117 is fixedly installed inside the transfer box 101. The top sealing plug 105 passes through the sealing baffle 117 and is slidably sealed to it. The bottom end of the top sealing plug 105 is flush with the bottom end of the sealing baffle 117. The sealing baffle 117 can prevent deposits from forming on the side wall of the top sealing plug 105 and ensure the sealing effect of the top sealing plug 105 on the top of the outlet pipe 102.

[0040] Both the outlet pipe 102 and the inlet pipe 103 penetrate the outer wall of the transfer box 101 and are slidably and sealingly connected to the outer wall of the transfer box 101. The outer side of the outlet pipe 102 is fitted with a lower connecting seat 118, and the outer side of the inlet pipe 103 is fitted with a side connecting seat 119. Both the lower connecting seat 118 and the side connecting seat 119 are fixedly connected to the transfer box 101. The outlet pipe 102 is threaded to the lower connecting seat 118, and the inlet pipe 103 is threaded to the side connecting seat 119, which makes it easy to disassemble the lower connecting seat 118 and the side connecting seat 119, thereby facilitating the cleaning of the deposits inside the lower connecting seat 118 and the side connecting seat 119.

[0041] Second implementation method:

[0042] Figures 7-10 This invention discloses a multi-stage treatment device for wastewater from packaging paper production. Unlike the first embodiment, a slidably sealed spacer ring 201 is provided on the inner side of the top end of the outlet pipe 102. An annular scraper 202 matching the outlet pipe 102 is fixedly connected to the bottom end of the spacer ring 201. A connecting rope 203 is fixedly connected between the spacer ring 201 and the top sealing plug 105. Because sediment adheres to the inner wall of the outlet pipe 102, during testing, the top sealing plug 105 is inserted into the outlet... When connecting pipe 102, deposits may obstruct the insertion of the top sealing plug 105 and affect its sealing effect. To avoid this, in this embodiment, a placeholder ring 201 and an annular scraper 202 are provided. The placeholder ring 201 prevents deposits from forming on the inner wall at the top of the connecting pipe 102. During the testing process, when the top sealing plug 105 is inserted into the connecting pipe 102, it will push the placeholder ring 201 downwards. After the top sealing plug 105 is inserted into the connecting pipe 102, it will... At the original location of the placeholder ring 201, the sealing effect of the top sealing plug 105 is guaranteed because there are no deposits there. During the downward movement of the top sealing plug 105 and the placeholder ring 201, if they encounter obstacles from deposits, the annular scraper 202 will break through the obstacles, ensuring that the top sealing plug 105 and the others can move downward smoothly. This ensures that the top sealing plug 105 can be smoothly inserted into the outlet pipe 102. Therefore, by setting the placeholder ring 201, the annular scraper 202, etc., the deposits on the inner wall of the outlet pipe 102 can be prevented from affecting the detection process, ensuring that the top sealing plug 105 can be smoothly inserted into the outlet pipe 102 and effectively seal the top of the outlet pipe 102, thereby further improving the accuracy of the detection results. In addition, during the detection, since the annular scraper 202 may scrape off a small amount of deposits, the influence of this factor needs to be considered when setting the reference pressure threshold. The reference pressure threshold should be adjusted appropriately to eliminate the influence of this factor on the detection results.

[0043] A matching connecting ring 204 is provided on the inner side of the top end of the air duct 109. A matching intercepting net 205 is fixedly connected to the bottom end of the connecting ring 204. During the testing process, a small amount of sediment may fall downwards. The intercepting net 205 can prevent the sediment from falling into the air cylinder 110. The connecting ring 204 is threadedly connected to the air duct 109, and the intercepting net 205 is movably connected to the air duct 109. A screw rod 206 is fixedly installed on the inner side of the connecting ring 204, so that the connecting ring 204 can be rotated by the screw rod 206, thereby removing the connecting ring 204 and the intercepting net 205, which facilitates the cleaning of the sediment on the inner side of the connecting ring 204.

[0044] A cleaning brush 207 is provided on the side of the outlet pipe 102 away from the bottom sealing plate 108. The cleaning brush 207 is fixedly connected to the outlet pipe 102 via a connecting rod 208. The bottom end of the cleaning brush 207 and the top end of the bottom sealing plate 108 are at the same height. During the testing process, a small amount of sediment may fall onto the bottom sealing plate 108. Therefore, after the test is completed, before the accumulation control module controls the push-pull electric push rod 107 to pull the bottom sealing plate 108 back to its original position, the accumulation control module will first control the push-pull electric push rod 107 to push the bottom sealing plate 108 again, so that the bottom sealing plate 108 moves toward the cleaning brush 207. This allows the cleaning brush 207 to clean the sediment that has fallen onto the bottom sealing plate 108, preventing sediment on the bottom sealing plate 108 from affecting subsequent tests and thus further improving the accuracy of the test.

[0045] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A multi-stage treatment device for wastewater from packaging paper production, comprising a pretreatment unit, a biological treatment unit, and a deep treatment unit connected in sequence, characterized in that, It also includes an intelligent volume detection unit, which includes a flow guiding volume detection component installed at the end of the raw water pipeline. The flow guiding volume detection component includes a transfer box (101), the bottom end of which is connected to an outlet pipe (102), and the side wall of the transfer box (101) is connected to an inlet pipe (103). A solenoid valve is installed on the inlet pipe (103). A lifting electric push rod (104) is fixedly installed on the inner wall of the top of the transfer box (101). The output end of the lifting electric push rod (104) is fixedly connected to a top sealing plug (105) that matches the outlet pipe (102). A support frame (106) is fixedly installed on the outer wall of the transfer box (101) on the side away from the inlet pipe (103). A push-pull electric push rod (107) is fixedly installed on the support frame (106). The output end of the push-pull electric push rod (107) is fixedly connected to... A bottom sealing plate (108) matching the outlet connecting pipe (102) is provided. The top end of the bottom sealing plate (108) is flush with the bottom end of the outlet connecting pipe (102). A duct pipe (109) is embedded through the bottom sealing plate (108). The bottom end of the duct pipe (109) is connected to an air cylinder (110). A controlled charging magnet (111) is fixedly installed on the inner wall of the bottom end of the air cylinder (110). Above the cylinder (110) are arranged a linkage magnet (113) and an inflation piston plate (112). The inflation piston plate (112) is slidably and sealed to the inner wall of the inflation cylinder (110). The bottom end of the inflation piston plate (112) is fixedly connected to the linkage magnet (113). A limit ring (114) is fixedly installed above the inflation piston plate (112). A pressure sensor (115) is fixedly installed above the limit ring (114).

2. The multi-stage treatment device for wastewater from packaging paper production according to claim 1, characterized in that, The end of the inlet pipe (103) away from the transfer box (101) is connected to the raw water pipeline. The pretreatment unit includes a coagulation sedimentation tank. The end of the outlet pipe (102) away from the transfer box (101) faces the coagulation sedimentation tank. The biological treatment unit includes a contact oxidation tank. The deep treatment unit includes a membrane bioreactor.

3. The multi-stage treatment device for wastewater from packaging paper production according to claim 1, characterized in that, The intelligent volume detection unit also includes a volume detection intelligent control system, which includes a volume detection setting module, a volume detection control module, a volume detection analysis module, and a remote reminder module. The volume detection setting module is signal-connected to the volume detection control module. The volume detection control module is signal-connected to the lifting electric push rod (104), the control charging magnet (111), the air pressure sensor (115), and the solenoid valve. The air pressure sensor (115) is signal-connected to the volume detection analysis module, and the volume detection analysis module is signal-connected to the remote reminder module.

4. The multi-stage treatment device for wastewater from packaging paper production according to claim 3, characterized in that, The volume detection intelligent control system also includes a compensation calculation module. The volume detection setting module is signal-connected to the compensation calculation module, and the compensation calculation module is signal-connected to the volume detection analysis module. A temperature sensor (120) is also fixedly installed inside the air cylinder (110). The volume detection control module is signal-connected to the temperature sensor (120), and the temperature sensor (120) is signal-connected to the compensation calculation module.

5. A multi-stage treatment device for wastewater from packaging paper production according to claim 1, characterized in that, A pair of elastic pull ropes (116) are fixedly connected between the bottom end of the inflation piston plate (112) and the inner wall of the bottom end of the inflation cylinder (110); a sealing baffle (117) is fixedly installed inside the transfer box (101), the top sealing plug (105) passes through the sealing baffle (117) and is slidably sealed to the sealing baffle (117), and the bottom end of the top sealing plug (105) is flush with the bottom end of the sealing baffle (117).

6. A multi-stage treatment device for wastewater from packaging paper production according to claim 1, characterized in that, The outlet pipe (102) and inlet pipe (103) both penetrate the outer wall of the transfer box (101) and are slidably and sealed to the outer wall of the transfer box (101). A lower connecting seat (118) is sleeved on the outer side of the outlet pipe (102), and a side connecting seat (119) is sleeved on the outer side of the inlet pipe (103). The lower connecting seat (118) and the side connecting seat (119) are both fixedly connected to the transfer box (101), and the outlet pipe (102) is threaded to the lower connecting seat (118), and the inlet pipe (103) is threaded to the side connecting seat (119).

7. A multi-stage treatment device for wastewater from packaging paper production according to claim 1, characterized in that, A spacer ring (201) is provided on the inner side of the top end of the outlet pipe (102). The spacer ring (201) is slidably and sealed to the inner side of the outlet pipe (102). An annular scraper (202) matching the outlet pipe (102) is fixedly connected to the bottom end of the spacer ring (201). A connecting rope (203) is fixedly connected between the spacer ring (201) and the top sealing plug (105).

8. A multi-stage treatment device for wastewater from packaging paper production according to claim 1, characterized in that, The inner side of the top end of the air duct (109) is provided with a matching connecting ring (204), and the bottom end of the connecting ring (204) is fixedly connected with a matching interception net (205).

9. A multi-stage treatment device for wastewater from packaging paper production according to claim 8, characterized in that, The connecting ring (204) is threadedly connected to the air duct (109), the intercepting net (205) is movably connected to the air duct (109), and a screw rod (206) is fixedly installed on the inner side of the connecting ring (204).

10. A multi-stage treatment device for wastewater from packaging paper production according to claim 7, characterized in that, A cleaning brush (207) is provided on the side of the outlet pipe (102) away from the bottom sealing plate (108). The cleaning brush (207) is fixedly connected to the outlet pipe (102) through a connecting rod (208). The bottom end of the cleaning brush (207) and the top end of the bottom sealing plate (108) are at the same height.

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