Biological treatment device for alkaline wastewater generated in acetylene preparation

Abstract

The invention discloses a biological treatment device for alkaline wastewater generated by acetylene preparation, and belongs to the technical field of wastewater treatment.The biological treatment device is characterized in that when carrier filler below a header pipe is replaced, a driving assembly works, a hollow shaft drives four material stirring plates to rotate anticlockwise, filler between the two lower material stirring plates is conveyed to an opening of a discharging box, and the filler is discharged through a discharging pipe; the packing falls into the discharging box along the inclined shifting plates, the used carrier packing can be taken out by opening the sealing door, the unused packing between the other two shifting plates is driven by the other two shifting plates to rotate to the lowermost portion in the fixing ring, the main pipe is fixed to enable the flow dividing holes to be communicated with the water outlet holes all the time, and waste water is accurately discharged to new packing to achieve permeation and degradation. According to the invention, synchronous cooperation of carrier filler replacement and wastewater treatment is realized, directional discharge of waste filler, accurate in-place of new filler and efficient water distribution can be completed without shutdown, the operation and maintenance convenience and the treatment continuity are greatly improved, and large-scale and continuous wastewater treatment requirements can be met.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a biological treatment device for alkaline wastewater generated during acetylene preparation. Background Technology

[0002] Acetylene, as an important basic chemical raw material, is widely used in organic synthesis, welding and cutting and other fields. Its industrial production mainly adopts processes such as calcium carbide method and natural gas cracking method. In the biological treatment process of alkaline wastewater from acetylene preparation, the microbial carrier is the core carrier for colonization of microbial community. Its operational stability and recycling efficiency directly affect the treatment efficiency and operating cost.

[0003] The microbial carriers used in existing technologies, such as porous ceramics, biochar, and polyurethane, are mostly fixed-fill carriers in traditional biological treatment devices. Strongly alkaline wastewater can cause salts such as calcium carbonate to crystallize and deposit in the carrier pores. At the same time, suspended solids such as carbide slag and aged biofilm in the wastewater can easily adhere to the carrier surface, forming a dense fouling layer that blocks the carrier pores and causes a significant decrease in the carrier's specific surface area. In existing biological treatment devices, porous ceramics, biochar, and other carriers are mostly fixed-fill or submerged. When replacing the microbial carrier, the bioreactor unit must be shut down and emptied, and the device must be disassembled to extract the carrier one by one. This is not only time-consuming and labor-intensive, but it also results in the wastewater not being treated during system downtime, causing production interruption and losses. Furthermore, it cannot meet the needs of large-scale, continuous wastewater treatment. Summary of the Invention

[0004] The purpose of this invention is to provide a biological treatment device for alkaline wastewater generated during acetylene preparation, in order to solve the problems mentioned in the background art, which require shutting down and emptying the bioreactor unit and disassembling the device to extract the carrier one by one when changing the microbial carrier. This is not only time-consuming and labor-intensive, but also causes the wastewater to be untreated during system shutdown, resulting in production interruption and losses, and is not suitable for large-scale and continuous wastewater treatment needs.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A biological treatment device for alkaline wastewater generated during acetylene production includes a treatment tank. One side of the treatment tank has a homogenization and equalization tank and a neutralization reaction tank, which are connected by an overflow hole. An inlet valve pipe is connected to the upper part of the homogenization and equalization tank. A deep treatment tank is located in the middle of the treatment tank. A partition is fixed to one side of the deep treatment tank, and a mesh plate is installed between one side of the inner wall of the deep treatment tank and the partition. Two side plates are fixed to the treatment tank above the deep treatment tank, and a transmission assembly is installed between the two side plates. Two suspended solids removal components are fixed inside the transmission assembly. An isolation frame is fixed to the other side of the inner wall of the deep treatment tank, located in a transfer tank between the deep treatment tank and the partition. A discharge valve is connected to the back of the treatment tank at a position corresponding to the isolation frame, with its end located inside the isolation frame. The bottom of the neutralization reaction tank is connected by a guide tube. The hole is connected to the transfer tank, and the bottom of the transfer tank is connected to a flow guiding component. The flow guiding component is installed on a support at the bottom of the treatment box. An aeration tank is provided on the side of the treatment box away from the neutralization reaction tank. An aeration mechanism is installed in the aeration tank. The other end of the flow guiding component is connected to the aeration tank. A baffle is fixed above the treatment box at the position corresponding to the aeration tank. A biological treatment box is fixed on one side of the baffle. The biological treatment box is fixed on the treatment box, and its bottom opening is connected to the deep treatment tank. A carrier storage hopper is installed on the top of the biological treatment box. A material support component is fixedly installed inside the biological treatment box. The top of the material support component is connected to the bottom of the carrier storage hopper. A material feeding component is provided inside the material support component. One end of the material feeding component passes through the biological treatment box and communicates with the inside of the baffle. The other end passes through the biological treatment box and is fixed to a drive component. A fixing plate is fixed outside the drive component and is fixed to one side of the biological treatment box.

[0007] As a further embodiment of the present invention, the homogenization and conditioning tank is used to fully mix wastewater of different time periods and concentrations to reduce water quality fluctuations; the neutralization reaction tank is used to adjust the pH value of the wastewater from strongly alkaline to 7.0-8.5, and a stirrer is installed in the neutralization reaction tank to ensure sufficient acid-base neutralization and avoid local over-acidity or over-alkalinity; flocculants and coagulants are added to the deep treatment tank to remove residual suspended solids and colloidal substances in the wastewater.

[0008] As a further embodiment of the present invention, the transmission assembly includes four transmission wheels, with a connecting shaft fixed between corresponding pairs of transmission wheels. One end of the connecting shaft passes through a side plate and is fixed with a transmission motor. The transmission motor is installed in the side plate, and the transmission wheels on both sides are fitted with the same transmission belt. The two transmission belts are fixed to both ends of the suspended matter removal assembly.

[0009] As a further embodiment of the present invention, the suspended matter removal assembly includes a vertical plate, with connecting blocks fixed at both the front and rear ends of the vertical plate. The connecting blocks are fixed outside the transmission belt. A scraper slides through the interior of the vertical plate. Three springs are fixed between the top of the scraper and the top of the inner wall of the vertical plate. One side of the top of the isolation frame is designed with an incline, and the bottom of the scraper below is located at the lowest point of the incline of the top of the isolation frame. The interior of the isolation frame is designed with a concave shape and is connected to the discharge valve.

[0010] As a further embodiment of the present invention, the flow guiding component includes a water pump, which is fixed on a support at the bottom of the treatment tank. The water pump has a water inlet and a water outlet connected to a water pumping pipe and a flow guiding pipe, respectively. The top end of the water pumping pipe passes through the treatment tank and is connected to the interior of the transfer tank. The other end of the flow guiding pipe is connected to the aeration tank.

[0011] As a further embodiment of the present invention, the material support assembly includes a fixing ring, which is fixed inside the biological treatment box. Inclined guide plates are fixed on both sides of the top opening of the fixing ring. The fixing ring is connected to the bottom of the upper carrier storage hopper through the two guide plates. Several drainage holes are opened at the bottom of the fixing ring. A discharge box is fixed in the back opening of the fixing ring. The discharge box is disposed through the rear of the biological treatment box and is equipped with a sealing door.

[0012] As a further embodiment of the present invention, the feeding assembly includes a hollow shaft, the two ends of which are rotatably connected to the biological treatment box via bushings. Four feeding plates are fixed to the outside of the hollow shaft, with the two lower feeding plates located above the water leakage holes. Water outlet holes are provided on the outside of the hollow shaft at positions corresponding to the positions between two adjacent feeding plates. A main pipe is sleeved inside the hollow shaft, and several diversion holes are provided at the bottom of the main pipe, which are connected to the lower water outlet holes. The other end of the main pipe passes through the biological treatment box and is connected to the inside of the baffle.

[0013] As a further embodiment of the present invention, the driving assembly includes a driving motor, which is fixed to a fixed plate. A turntable is fixed on the output shaft of the driving motor. An annular slide rail is provided on the side of the turntable near the driving motor. A fin is fixed to the protruding end of the turntable. One end of the hollow shaft passes through the biological treatment box and is fixed to the driving disk. Four slide grooves are provided on one side of the driving disk. A slide post is provided between two adjacent slide grooves. The slide post is fixed to the side of the driving disk. One of the slide posts corresponds to the opening of the slide rail. The fin is slidably connected in one of the slide grooves.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, when replacing the carrier packing below the main pipe, the drive motor drives the turntable to rotate. The drive motor drives the turntable to rotate, and the paddles on the turntable slide within the grooves of the drive disc. Through the cooperation of the paddles and the turntable slide, the drive disc drives the hollow shaft to rotate intermittently. Four material-pushing plates fixed outside the hollow shaft rotate counterclockwise synchronously with the hollow shaft. Their rotation trajectory precisely covers the entire carrier bearing surface of the fixed ring, periodically dispersing and pushing the accumulated microbial carrier packing. When the hollow shaft drives the four material-pushing plates to rotate 90 degrees synchronously, the packing between the two lower material-pushing plates is transported to the opening of the discharge box. The packing then falls into the discharge box along the inclined material-pushing plates. The used carrier packing can be removed by opening the sealing door. As the hollow shaft drives the multiple material-pushing plates to continue rotating 90 degrees, the upper two... Each material-pulling plate rotates the unused packing material between them to the bottom of the fixed ring. At this time, the unused packing material is located directly above the drain hole. Since the hollow shaft is sleeved outside the main pipe, the main pipe is in a fixed state, so that the diversion hole in the main pipe always faces downward and is connected to the outlet hole between the two adjacent material-pulling plates. Wastewater flows precisely into the internal cavity of the hollow shaft through the diversion hole at the bottom of the main pipe, and finally is evenly discharged from the outlet hole at the bottom of the hollow shaft to the bottom carrier packing material. This allows the wastewater to gradually penetrate into the microbial carrier packing material, realizing the synchronous and coordinated replacement of the carrier packing material and wastewater treatment. It can complete the directional discharge of waste packing material and the precise placement of new packing material and efficient water distribution without stopping the machine, greatly improving the convenience of operation and maintenance and the continuity of treatment, ensuring stable biodegradation efficiency, and adapting to the needs of large-scale and continuous wastewater treatment. 2. In this invention, when cleaning suspended solids inside the treatment tank, the drive motor drives the connecting shaft to rotate, causing the drive wheels on both sides to rotate synchronously, which in turn drives the drive belt to circulate. The drive belt, through the connecting block, drives the vertical plate to move synchronously, allowing the scraper at the bottom to move horizontally to the right and scrape off the suspended solids on the upper layer of the wastewater. When the scraper moves to the right to the lowest point of the inclined surface at the top of the isolation frame, the scraper is pressed and moves upward, squeezing the spring. Under the elastic action of the spring, the scraper always adheres to the inclined surface at the top of the isolation frame until the scraper scrapes the flocculent suspended solids settled in the deep treatment tank into the concave interior of the isolation frame. Finally, the suspended solids are discharged through the discharge valve connected to the isolation frame, completing the automated removal of suspended solids and avoiding the accumulation of suspended solids that affects the treatment effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the processing box of the present invention;

[0018] Figure 3 This is a schematic diagram of the transmission component of the present invention;

[0019] Figure 4 This is a schematic diagram of a partial cross-section of the suspended matter removal component of the present invention;

[0020] Figure 5 This is a schematic diagram of the cross-section of the processing box of the present invention;

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the biological treatment box of the present invention;

[0022] Figure 7 This is a schematic diagram of the material support assembly of the present invention;

[0023] Figure 8 This is a schematic diagram of the material feeding assembly of the present invention;

[0024] Figure 9 This is a schematic diagram of the structure of the driving component of the present invention.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Treatment tank; 2. Homogenization tank; 3. Neutralization reaction tank; 4. Inlet valve pipe; 5. Deep treatment tank; 6. Baffle plate; 7. Mesh plate; 8. Side plate; 9. Transmission assembly; 901. Transmission wheel; 902. Transmission belt; 903. Transmission motor; 904. Connecting shaft; 10. Suspended solids removal assembly; 101. Vertical plate; 102. Connecting block; 103. Scraper; 104. Spring; 11. Isolation frame; 12. Discharge valve; 13. Flow guiding assembly; 131. Water pump; 132. Pumping pipe; 133. Flow guiding pipe; 14. Aeration tank; 15. Aeration Mechanism; 16. Baffle; 17. Biological treatment box; 18. Carrier storage hopper; 19. Material support assembly; 191. Fixing ring; 192. Guide plate; 193. Drain hole; 194. Discharge box; 195. Sealing door; 20. Material feeding assembly; 201. Hollow shaft; 202. Material feeding plate; 203. Water outlet; 204. Main pipe; 205. Diversion hole; 21. Drive assembly; 211. Drive motor; 212. Turntable; 213. Slide rail; 214. Pulley; 215. Drive disc; 216. Slide groove; 217. Slide column; 22. Fixing plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-9 The present invention provides a technical solution:

[0029] A biological treatment device for alkaline wastewater generated from acetylene preparation includes a treatment tank 1. A homogenization tank 2 and a neutralization reaction tank 3 are provided on one side of the treatment tank 1. The homogenization tank 2 and the neutralization reaction tank 3 are connected through an overflow hole opened in the treatment tank 1. An inlet valve pipe 4 is connected to the upper part of the homogenization tank 2. A deep treatment tank 5 is provided in the middle of the treatment tank 1.

[0030] During operation, the alkaline wastewater generated from acetylene preparation is first introduced into the homogenization and equalization tank 2 inside the treatment tank 1 through the inlet valve pipe 4. Wastewater with different time periods and different pollutant concentrations is fully mixed. Through the diffusion and disturbance effect of the water body itself, the fluctuation range of water quality and quantity is reduced. After homogenization and equalization, the wastewater flows into the adjacent neutralization reaction tank 3 automatically through the pre-set overflow hole in the treatment tank 1, relying on the liquid level difference. The neutralization reaction tank 3 adjusts the wastewater from strong alkalinity to a neutral range suitable for subsequent biological treatment. The internal agitator runs continuously to ensure that the added neutralizing agent is fully contacted and evenly mixed with the wastewater, avoiding local over-acidity or over-alkalinity and ensuring that the acid-base neutralization reaction is thorough.

[0031] A partition 6 is fixed on one side of the deep treatment tank 5. A mesh plate 7 is provided between the partition 6 and one side of the inner wall of the deep treatment tank 5. Two side plates 8 are fixed on the treatment box 1 at the position above the deep treatment tank 5. A transmission assembly 9 is installed between the two side plates 8. Two suspended matter removal assemblies 10 are fixed inside the transmission assembly 9. An isolation frame 11 is fixed on the other side of the inner wall of the deep treatment tank 5. The isolation frame 11 is located in the turnover tank set between the deep treatment tank 5 and the partition 6. A discharge valve 12 is connected to the back of the treatment box 1 at the position corresponding to the isolation frame 11. The end of the discharge valve 12 is located inside the isolation frame 11. The bottom of the neutralization reaction tank 3 is connected to the turnover tank through a guide hole. A guide assembly 13 is connected to the bottom of the turnover tank.

[0032] During operation, the wastewater after neutralization reaction flows into the transfer tank through the guide hole at the bottom of the neutralization reaction tank 3. The transfer tank is formed by the inner wall of the deep treatment tank 5, the baffle 6, and the isolation frame 11. The transfer tank serves as an intermediate transition unit to achieve a smooth connection between the wastewater from the neutralization reaction to the aeration treatment, while temporarily storing the wastewater to balance the hydraulic load of the subsequent treatment units.

[0033] The flow guiding component 13 is installed on the support at the bottom of the treatment tank 1. An aeration tank 14 is provided on the side of the treatment tank 1 away from the neutralization reaction tank 3. An aeration mechanism 15 is installed in the aeration tank 14. The other end of the flow guiding component 13 is connected to the aeration tank 14. The wastewater entering the aeration tank 14 is aerated and oxidized by the aeration mechanism 15 installed in the tank. The aeration mechanism 15 continuously introduces air into the wastewater to increase the dissolved oxygen content of the wastewater. The bubble disturbance effect generated by aeration can make the wastewater fully contact with oxygen, and at the same time oxidize and decompose some of the reducing pollutants in the wastewater.

[0034] A baffle 16 is fixed above the treatment box 1 at the position corresponding to the aeration tank 14. A biological treatment box 17 is fixed on one side of the baffle 16. The biological treatment box 17 is fixed on the treatment box 1, and its bottom opening is connected to the deep treatment tank 5. A carrier storage hopper 18 is installed on the top of the biological treatment box 17. A material support assembly 19 is fixedly installed inside the biological treatment box 17. The top of the material support assembly 19 is connected to the bottom of the carrier storage hopper 18. A material feeding assembly 20 is provided inside the material support assembly 19. One end of the material feeding assembly 20 passes through the biological treatment box 17 and is connected to the inside of the baffle 16. The other end passes through the biological treatment box 17 and is fixed with a drive assembly 21. A fixing plate 22 is fixed outside the drive assembly 21 and is fixed to one side of the biological treatment box 17.

[0035] As a further embodiment of the present invention, the homogenization and equalization tank 2 is used to fully mix wastewater of different time periods and concentrations to reduce water quality fluctuations; the neutralization reaction tank 3 is used to adjust the pH value of the wastewater from strongly alkaline to 7.0-8.5, and a stirrer is installed in the neutralization reaction tank 3 to ensure sufficient acid-base neutralization and avoid local over-acidity or over-alkalinity; flocculants and coagulants are added to the deep treatment tank 5 to remove residual suspended solids and colloidal substances in the wastewater.

[0036] As a further embodiment of the present invention, the transmission assembly 9 includes four transmission wheels 901, and a connecting shaft 904 is fixed between two corresponding transmission wheels 901. One end of the connecting shaft 904 passes through the side plate 8 and a transmission motor 903 is fixed thereon. The transmission motor 903 is installed in the side plate 8. The same transmission belt 902 is sleeved on both sides of the transmission wheels 901. The two transmission belts 902 are fixed to both ends of the suspended matter removal assembly 10.

[0037] During operation, the drive motor 903 drives the connecting shaft 904 to rotate, which in turn drives the drive wheels 901 on both sides to rotate synchronously, thereby driving the drive belt 902 to circulate. The drive belt 902 then drives the suspended matter removal component 10 to move, so as to automatically scrape the suspended matter in the processing box 1.

[0038] As a further embodiment of the present invention, the suspended matter removal assembly 10 includes a vertical plate 101, with connecting blocks 102 fixed at the front and rear ends of the vertical plate 101 respectively. The connecting blocks 102 are fixed outside the transmission belt 902. A scraper 103 slides through the interior of the vertical plate 101. Three springs 104 are fixed between the top of the scraper 103 and the top of the inner wall of the vertical plate 101. One side of the top of the isolation frame 11 is designed with a slope, and the bottom of the scraper 103 is located at the lowest point of the slope of the top of the isolation frame 11. The interior of the isolation frame 11 is designed with a concave shape and is connected to the discharge valve 12.

[0039] During operation, the transmission belt 902 drives the vertical plate 101 to move synchronously through the connecting block 102, so that the scraper 103 at the lower position can move horizontally to the right and scrape off the suspended matter on the upper layer of wastewater. When the scraper 103 moves to the right to the lowest point of the top slope of the isolation frame 11, the scraper 103 will be pressed and move upward and squeeze the spring 104. Under the elastic action of the spring 104, the scraper 103 always adheres to the top slope of the isolation frame 11 until the scraper 103 scrapes the flocculent suspended matter settled in the deep treatment tank 5 into the concave interior of the isolation frame 11.

[0040] As a further embodiment of the present invention, the flow guiding component 13 includes a water pump 131, which is fixed on a support at the bottom of the treatment tank 1. The water pump 131 has a water inlet end and a water outlet end connected to a water pumping pipe 132 and a flow guiding pipe 133, respectively. The top end of the water pumping pipe 132 passes through the treatment tank 1 and is connected to the interior of the transfer tank. The other end of the flow guiding pipe 133 is connected to the aeration tank 14.

[0041] During operation, the water pump 131 draws out the neutralized wastewater from the transfer pool through the water pumping pipe 132, and then accurately transports it to the aeration tank 14 on the other side of the treatment tank 1 through the guide pipe 133, thus completing the directional transfer of wastewater.

[0042] As a further embodiment of the present invention, the material support assembly 19 includes a fixing ring 191, which is fixed inside the biological treatment box 17. Inclined guide plates 192 are fixed on both sides of the top opening of the fixing ring 191. The fixing ring 191 is connected to the bottom of the upper carrier storage hopper 18 through the two guide plates 192, so that the carrier packing in the carrier storage hopper 18 enters the biological treatment box 17 through the guide plates 192 under the action of gravity, and the packing is located between the two upper push plates 202.

[0043] The bottom of the fixing ring 191 is provided with several drainage holes 193, and a discharge box 194 is fixed in the back opening of the fixing ring 191. The discharge box 194 is disposed through the rear of the biological treatment box 17, and a sealing door 195 is installed in the discharge box 194.

[0044] During operation, the wastewater comes into contact with the bottom carrier packing. After the wastewater permeates the carrier packing, it falls through the drain hole 193 at the bottom of the fixing ring 191 and into the deep treatment tank 5. The used packing can be removed by opening the sealing door 195.

[0045] As a further embodiment of the present invention, the feeding assembly 20 includes a hollow shaft 201. Both ends of the hollow shaft 201 are rotatably connected to the biological treatment box 17 via bushings. Four feeding plates 202 are fixed on the outside of the hollow shaft 201. The two lower feeding plates 202 are located above the drain hole 193. A water outlet hole 203 is opened on the outside of the hollow shaft 201 at the position between two adjacent feeding plates 202. A main pipe 204 is sleeved inside the hollow shaft 201. Several diversion holes 205 are opened at the bottom of the main pipe 204. The several diversion holes 205 are connected to the lower water outlet hole 203. The other end of the main pipe 204 passes through the biological treatment box 17 and is connected to the inside of the baffle 16.

[0046] During operation, the four material-pulling plates 202 fixed to the outside of the hollow shaft 201 rotate counterclockwise synchronously with the hollow shaft 201. Their rotation trajectory precisely covers the entire carrier bearing surface of the fixed ring 191, periodically dispersing and pushing the accumulated microbial carrier packing. When the hollow shaft 201 drives the four material-pulling plates 202 to rotate synchronously, the upper two material-pulling plates 202 drive the unused packing between them to rotate to the bottom of the fixed ring 191, thus achieving the synchronous and coordinated purpose of carrier packing replacement and wastewater treatment.

[0047] As a further embodiment of the present invention, the drive assembly 21 includes a drive motor 211, which is fixed to the fixed plate 22. A turntable 212 is fixed on the output shaft of the drive motor 211. An annular slide rail 213 is provided on the side of the turntable 212 near the drive motor 211. A pawl 214 is fixed on the protruding end of the turntable 212. One end of the hollow shaft 201 passes through the biological treatment box 17 and is fixed to the drive disk 215. Four slide grooves 216 are provided on one side of the drive disk 215. A slide post 217 is provided between two adjacent slide grooves 216. The slide post 217 is fixed on the side of the drive disk 215. One of the slide posts 217 corresponds to the opening of the slide rail 213. The pawl 214 is slidably connected in one of the slide grooves 216.

[0048] During operation, the annular slide 213 on the side of the turntable 212 near the drive motor 211 forms a guiding engagement with the slide post 217 on the side of the drive disk 215. At the same time, the push post 214 fixed at the protruding end of the turntable 212 is embedded in the slide groove 216 of the drive disk 215. As the turntable 212 continues to rotate, the push post 214 slides back and forth in the slide groove 216. Through the limiting guidance of the slide post 217 and the slide 213, the drive disk 215 drives the hollow shaft 201 to rotate intermittently at a constant speed, thereby facilitating the synchronous adjustment of the material feeding plate 202 outside the hollow shaft 201 and the material changing operation.

[0049] Working principle of this invention:

[0050] The alkaline wastewater generated from acetylene preparation is first introduced into the homogenization and equalization tank 2 inside the treatment tank 1 through the inlet valve pipe 4. This process thoroughly mixes wastewater with different concentrations of pollutants at different times. Through the diffusion and disturbance effects of the water itself, the fluctuations in water quality and quantity are reduced. After homogenization and equalization, the wastewater flows automatically into the adjacent neutralization reaction tank 3 through a pre-set overflow hole inside the treatment tank 1, relying on the liquid level difference. The neutralization reaction tank 3 adjusts the wastewater from a strongly alkaline state to a neutral range suitable for subsequent biological treatment. The internal agitator continuously operates, ensuring that the added neutralizing agent fully contacts and mixes evenly with the wastewater, preventing localized over-acidity or... In cases of excessive alkalinity, to ensure thorough acid-base neutralization, the wastewater after neutralization flows into the transfer tank through the guide hole at the bottom of the neutralization reaction tank 3. The transfer tank is formed by the inner wall of the deep treatment tank 5, the partition 6, and the isolation frame 11. The transfer tank serves as an intermediate transition unit to achieve a smooth connection between the wastewater from the neutralization reaction to the aeration treatment. At the same time, it temporarily stores the wastewater to balance the hydraulic load of the subsequent treatment units. After the guide component 13 is started, the water pump 131 pumps the neutralized wastewater out of the transfer tank through the water pumping pipe 132, and then accurately transports it to the aeration tank 14 on the other side of the treatment tank 1 through the guide pipe 133, thus completing the directional transfer of wastewater.

[0051] Wastewater entering aeration tank 14 undergoes aeration oxidation treatment via aeration mechanism 15 installed within the tank. The aeration mechanism 15 continuously introduces air into the wastewater, increasing its dissolved oxygen content. The bubble agitation effect generated by the aeration ensures sufficient contact between the wastewater and oxygen, while simultaneously oxidizing and decomposing some reducing pollutants in the wastewater. After aeration treatment, the wastewater is guided through a baffle 16 above the treatment tank 1 into the biological treatment box 17. The baffle 16 guides the wastewater to flow into the main pipe 204, from which it flows through the bottom of the main pipe 204. The diversion hole 205 of the part discharges from the outlet hole 203 at the bottom of the hollow shaft 201, and a carrier packing is provided between two adjacent material feeding plates 202 so that the wastewater comes into contact with the bottom carrier packing. After the wastewater permeates the carrier packing, it falls from the drain hole 193 at the bottom of the fixed ring 191 and falls into the deep treatment tank 5. By adding flocculant and coagulant aid in the deep treatment tank 5, residual suspended solids and colloidal substances in the wastewater are removed. Larger impurities are isolated above by the screen plate 7, and the generated suspended solids are in the upper layer of the wastewater.

[0052] Because the fixed ring 191 is connected to the bottom of the upper carrier storage hopper 18 through two guide plates 192, the carrier packing in the carrier storage hopper 18 enters the biological treatment box 17 through the guide plates 192 under the action of gravity, so that the packing is located between the two upper push plates 202. When it is necessary to replace the carrier packing below the main pipe 204, the drive motor 211 drives the turntable 212 to rotate. The annular slide 213 opened on the side of the turntable 212 near the drive motor 211 forms a guiding engagement with the sliding column 217 on the side of the drive disk 215. At the same time, the push column 214 fixed at the protruding end of the turntable 212 is embedded in the slide groove 216 of the drive disk 215. As the turntable 212 continues to rotate, the push column 214 slides back and forth in the slide groove 216. Through the limiting guidance of the sliding column 217 and the slide 213, the drive disk 215 drives the hollow shaft 201 intermittently. The hollow shaft 201 rotates at a uniform speed, and the four material-pulling plates 202 fixed outside the hollow shaft 201 rotate counterclockwise synchronously with the hollow shaft 201. Their rotation trajectory precisely covers the entire carrier bearing surface of the fixed ring 191, periodically dispersing and pushing the accumulated microbial carrier packing. When the hollow shaft 201 drives the four material-pulling plates 202 to rotate 90 degrees synchronously, the packing between the two lower material-pulling plates 202 is transported to the opening of the discharge box 194. The packing falls into the discharge box 194 along the inclined material-pulling plates 202. The used carrier packing can be taken out by opening the sealing door 195. As the hollow shaft 201 drives the multiple material-pulling plates 202 to continue rotating 90 degrees, the unused packing between the two upper material-pulling plates 202 rotates to the bottom of the fixed ring 191. At this time, the unused packing is located directly above the water leakage hole 193.

[0053] Since the hollow shaft 201 is sleeved on the outside of the main pipe 204, the main pipe 204 is in a fixed state, so that the diversion hole 205 in the main pipe 204 always faces downward and is connected to the water outlet hole 203 between the two adjacent material feeding plates 202. Wastewater flows precisely into the internal cavity of the hollow shaft 201 through the diversion hole 205 at the bottom of the main pipe 204, and is finally evenly discharged from the water outlet hole 203 at the bottom of the hollow shaft 201 to the bottommost carrier packing, so that the wastewater gradually penetrates into the microbial carrier packing and flows into the deep treatment tank 5.

[0054] By activating the transmission assembly 9, the transmission motor 903 drives the connecting shaft 904 to rotate, which in turn drives the transmission wheels 901 on both sides to rotate synchronously, thereby driving the transmission belt 902 to circulate. The transmission belt 902 then drives the vertical plate 101 to move synchronously through the connecting block 102, so that the scraper 103 at the lower position can move horizontally to the right and scrape off the suspended solids on the upper layer of the wastewater. When the scraper 103 moves to the right to the lowest point of the top slope of the isolation frame 11, the scraper 103 will be pressed and move upward and squeeze the spring 104. Under the elastic action of the spring 104, the scraper 103 will always be in contact with the top slope of the isolation frame 11 until the scraper 103 scrapes the flocculent suspended solids settled in the deep treatment tank 5 into the concave interior of the isolation frame 11, and finally discharges them through the discharge valve 12 connected to the isolation frame 11, completing the automatic removal of suspended solids.

Claims

1. A biological treatment device for alkaline wastewater generated during acetylene preparation, comprising a treatment tank (1), characterized in that: The treatment box (1) is equipped with a homogenization tank (2) and a neutralization reaction tank (3) on one side. The homogenization tank (2) and the neutralization reaction tank (3) are connected through an overflow hole in the treatment box (1). A sludge inlet valve pipe (4) is connected to the upper part of the homogenization tank (2). A deep treatment tank (5) is provided in the middle of the treatment box (1). A partition (6) is fixed on one side of the deep treatment tank (5). A mesh plate (7) is provided between one side of the inner wall of the deep treatment tank (5) and the partition (6). Two side plates (8) are fixed on the treatment box (1) at the position above the deep treatment tank (5). A transmission assembly (9) is installed between the side plates (8). Two suspended solids removal assemblies (10) are fixed inside the transmission assembly (9). An isolation frame (11) is fixed on the other side of the inner wall of the deep treatment tank (5). The isolation frame (11) is located in the turnover tank set between the deep treatment tank (5) and the partition (6). A discharge valve (12) is connected to the back of the treatment box (1) at the position corresponding to the isolation frame (11). The end of the discharge valve (12) is located inside the isolation frame (11). The bottom of the neutralization reaction tank (3) is connected to the turnover tank through a guide hole, and a guide assembly (13) is connected to the bottom of the turnover tank. The flow guiding component (13) is installed on a support at the bottom of the treatment tank (1). An aeration tank (14) is provided on the side of the treatment tank (1) away from the neutralization reaction tank (3). An aeration mechanism (15) is installed in the aeration tank (14). The other end of the flow guiding component (13) is connected to the aeration tank (14). A baffle (16) is fixed on the upper part of the treatment tank (1) at the position corresponding to the aeration tank (14). A biological treatment box (17) is fixed on one side of the baffle (16). The biological treatment box (17) is fixed on the treatment tank (1), and its bottom opening is connected to the deep treatment tank (5). 7) The top of the container is equipped with a carrier storage hopper (18). The inside of the biological treatment box (17) is fixedly equipped with a material support assembly (19). The top of the material support assembly (19) is connected to the bottom of the carrier storage hopper (18). The inside of the material support assembly (19) is equipped with a material feeding assembly (20). One end of the material feeding assembly (20) passes through the biological treatment box (17) and communicates with the inside of the baffle (16). The other end passes through the biological treatment box (17) and is fixed with a drive assembly (21). A fixing plate (22) is fixed outside the drive assembly (21). The fixing plate (22) is fixed on one side of the biological treatment box (17).

2. The biological treatment device for alkaline wastewater generated during acetylene preparation according to claim 1, characterized in that: The homogenization tank (2) is used to fully mix wastewater of different time periods and concentrations to reduce water quality fluctuations. The neutralization reaction tank (3) is used to adjust the pH value of the wastewater from strong alkalinity to 7.0-8.

5. A stirrer is installed in the neutralization reaction tank (3) to ensure that acid and alkali neutralization is sufficient and to avoid local over-acidity or over-alkaliness. Flocculants and coagulants are added to the deep treatment tank (5) to remove residual suspended solids and colloidal substances in the wastewater.

3. The biological treatment device for alkaline wastewater generated during acetylene preparation according to claim 1, characterized in that: The transmission assembly (9) includes four transmission wheels (901), and a connecting shaft (904) is fixed between two corresponding transmission wheels (901). One end of the connecting shaft (904) passes through the side plate (8) and is fixed with a transmission motor (903). The transmission motor (903) is installed in the side plate (8). The transmission wheels (901) on both sides are covered with the same transmission belt (902). The two transmission belts (902) are fixed to both ends of the suspended matter removal assembly (10).

4. The biological treatment device for alkaline wastewater generated during acetylene preparation according to claim 3, characterized in that: The suspended matter removal assembly (10) includes a vertical plate (101), with connecting blocks (102) fixed at the front and rear ends of the vertical plate (101) respectively. The connecting blocks (102) are fixed outside the transmission belt (902). A scraper (103) slides through the interior of the vertical plate (101). Three springs (104) are fixed between the top of the scraper (103) and the top of the inner wall of the vertical plate (101). One side of the top of the isolation frame (11) is designed with a slope, and the bottom of the scraper (103) is located at the lowest point of the slope of the top of the isolation frame (11). The interior of the isolation frame (11) is designed with a concave shape and is connected to the discharge valve (12).

5. A biological treatment device for alkaline wastewater generated during acetylene preparation according to claim 1, characterized in that: The flow guiding component (13) includes a water pump (131), which is fixed on a support at the bottom of the treatment tank (1). The water pump (131) has a water inlet end and a water outlet end connected to a water pumping pipe (132) and a flow guiding pipe (133), respectively. The top end of the water pumping pipe (132) passes through the treatment tank (1) and is connected to the inside of the transfer tank. The other end of the flow guiding pipe (133) is connected to the aeration tank (14).

6. A biological treatment device for alkaline wastewater generated during acetylene preparation according to claim 1, characterized in that: The material support assembly (19) includes a fixing ring (191), which is fixed inside the biological treatment box (17). Inclined guide plates (192) are fixed on both sides of the top opening of the fixing ring (191). The fixing ring (191) is connected to the bottom of the upper carrier storage hopper (18) through the two guide plates (192). Several drainage holes (193) are opened at the bottom of the fixing ring (191). A discharge box (194) is fixed in the back opening of the fixing ring (191). The discharge box (194) is disposed through the rear of the biological treatment box (17), and a sealing door (195) is installed in the discharge box (194).

7. A biological treatment device for alkaline wastewater generated during acetylene preparation according to claim 6, characterized in that: The feeding assembly (20) includes a hollow shaft (201). Both ends of the hollow shaft (201) are rotatably connected to the biological treatment box (17) through bushings. Four feeding plates (202) are fixed on the outside of the hollow shaft (201). The two lower feeding plates (202) are located above the water leakage hole (193). A water outlet hole (203) is opened on the outside of the hollow shaft (201) at the position between two adjacent feeding plates (202). A main pipe (204) is sleeved inside the hollow shaft (201). Several diversion holes (205) are opened at the bottom of the main pipe (204). Several diversion holes (205) are connected to the lower water outlet hole (203). The other end of the main pipe (204) passes through the biological treatment box (17) and is connected to the inside of the baffle (16).

8. A biological treatment device for alkaline wastewater generated during acetylene preparation according to claim 7, characterized in that: The drive assembly (21) includes a drive motor (211), which is fixed to a fixed plate (22). A turntable (212) is fixed on the output shaft of the drive motor (211). An annular slide (213) is provided on the side of the turntable (212) near the drive motor (211). A swivel post (214) is fixed on the protruding end of the turntable (212). One end of the hollow shaft (201) passes through the biological treatment box (17) and is fixed to a drive disk (215). Four slide grooves (216) are provided on one side of the drive disk (215). A slide post (217) is provided between two adjacent slide grooves (216). The slide post (217) is fixed on the side of the drive disk (215). One of the slide posts (217) corresponds to the opening of the slide groove (213). The swivel post (214) is slidably connected in one of the slide grooves (216).

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