An environmentally friendly treatment device for chemical nickel plating wastewater

Abstract

A device for environmentally friendly treatment of chemical nickel plating wastewater includes a drum dryer and a dehumidification system. The drum dryer includes a material trough, a drying drum and a scraper device. The scraper device includes a blade, a tool holder and a pressing cylinder. The pressing cylinder is connected to a pneumatic control system. The telescopic end of the pressing cylinder is fixedly connected to the tool holder. The blade is detachably fixedly mounted on the tool holder. The dehumidification system includes a steam collection hood, a spray tower and an induced draft fan. The steam collection hood is arranged directly above the drying drum. The steam collection hood is connected to the bottom of the spray tower through a first pipeline, and the top of the spray tower is connected to the induced draft fan through a second pipeline. The present invention includes a drum dryer and a dehumidification system, which can dry and solidify the viscous wastewater after nickel plating. The dried material can be used as raw materials for manufacturing high-standard cement and fertilizers, etc., thereby realizing the environmentally friendly recycling of nickel plating wastewater. The harmful gases generated by the wastewater can be purified by the dehumidification system and discharged into the air to achieve environmental protection purposes.

Description

Technical Field

[0001] The invention relates to the technical field of dryers, and in particular to an environmentally friendly treatment device for chemical nickel plating wastewater. Background Art

[0002] After the nickel plating solution is used for multiple cycles, sodium sulfate, sodium phosphite and other substances in the solution are continuously enriched. When the content is high, the viscosity of the solution will increase, causing the solution to be scrapped and fail to meet the requirements of plating. The solution in the plating tank needs to be replaced for use. The direct discharge of wastewater at the terminal will pollute the environment very much. It needs to be treated with environmental protection equipment to meet the emission standards and the chemical substances in the wastewater need to be recycled and reused. However, such equipment is relatively lacking in the market. Summary of the invention

[0003] The present invention aims to solve the problems existing in the above-mentioned prior art and provides an environmentally friendly treatment device for chemical nickel plating wastewater. A drum dryer is used to dry and solidify the wastewater. The dried material can be used as raw material for manufacturing high-standard cement and fertilizer, thereby realizing the environmentally friendly recycling of nickel plating wastewater.

[0004] The present invention solves its technical problem by adopting a technical solution: an environmental protection treatment device for chemical nickel plating wastewater, comprising a drum dryer and a dehumidification system, the drum dryer comprising a material trough, a drying drum and a scraper device, the material trough is connected to a feeding system, a drying drum is rotatably installed above the material trough, one end of the drying drum is connected to a steam device through a rotary joint, the steam device comprises a steam inlet main pipe and a drain pipe, the scraper device is arranged on one side of the drying drum, the scraper device comprises a blade, a knife holder and a pressing cylinder, the pressing cylinder is connected to a pneumatic control system, the telescopic end of the pressing cylinder is fixedly connected to the knife holder, the blade is detachably fixedly installed on the knife holder, a discharge hopper is arranged below the blade, the blade is tightly fitted with the outer surface of the drying drum under the pressure of the pressing cylinder, the dehumidification system comprises a steam collecting hood, a spray tower and an induced draft fan, the steam collecting hood is arranged directly above the drying drum, the steam collecting hood is connected to the bottom of the spray tower through a first pipeline, and the top of the spray tower is connected to the induced draft fan through a second pipeline.

[0005] Further improvement, the tool holder includes a fixed bracket and a rotating bracket, the fixed bracket is fixedly connected to the clamping cylinder, the rotating bracket is rotatably installed on the fixed bracket, the rotating bracket has at least two mounting slots distributed circumferentially, the blade is installed on the mounting slot, and one end of the rotating bracket is connected to a dividing motor.

[0006] For further improvement, a positioning groove is provided on the back of the blade, a hollow hole is provided at a position corresponding to the positioning groove on the mounting slot, a sliding drive cylinder is provided at the other end of the rotating bracket, the sliding drive cylinder is connected to the pneumatic control system, and a positioning protrusion is provided on an output rod of the sliding drive cylinder, and the positioning protrusion is matched with the positioning groove in a concave-convex manner.

[0007] Further improvement also includes a material thickness detection system, which includes a control module, a sensor bracket, and a first ranging sensor and a second ranging sensor fixed on the sensor bracket. The first ranging sensor and the second ranging sensor are respectively arranged at the upstream and downstream positions of the blade, and are used to detect the thickness of the dry material adhered to the surface of the drying drum. The first ranging sensor and the second ranging sensor are electrically connected to the control module, and the control module is electrically connected to the pneumatic control system. The sensor bracket is slidably installed on the sliding bracket, and the sliding drive cylinder is a cylinder with a double-headed output rod. The other output rod of the sliding drive cylinder is connected to the sensor bracket through a linkage rod.

[0008] For further improvement, an isolating cylinder is coaxially mounted inside the drying drum, an interlayer is provided between the isolating cylinder and the inner wall of the drying drum, and the interlayer is connected to the steam inlet main pipe and the drainage pipe.

[0009] For further improvement, one end of the isolation cylinder is connected to a fixed pipe, which passes through the outside of the isolation cylinder. A plurality of ventilation grooves are provided on the upper surface of the isolation cylinder, and one end of the ventilation groove is connected to the end face of the isolation cylinder located on the side of the steam inlet main pipe.

[0010] For further improvement, an air inlet valve and an air outlet valve are provided at one end of the fixed tube, the air outlet valve is connected to the vacuum pump, an air inlet pipe and an air outlet pipe are provided inside the fixed tube, one end of the air inlet pipe and the air outlet pipe are respectively connected to the air inlet valve and the air outlet valve, and the other ends of the air inlet pipe and the air outlet pipe are respectively extended to the upper and lower sides of the inside of the isolation tube.

[0011] To further improve, the material trough is provided with a liquid level control system, the liquid level control system includes a drain valve and an overflow valve, the drain valve is arranged on the bottom wall of the material trough, the overflow valve is arranged on the side wall of the material trough, the overflow valve includes a valve body, a valve stem and an overflow plate, the inner wall of the valve body is provided with an overflow channel, the two ends of the overflow channel are respectively provided with an overflow port and an overflow port, the overflow port is connected to the side wall of the material trough, the height of the overflow port is greater than the height of the overflow port, a vertical slide groove is provided in the middle of the overflow channel, a receiving groove is provided at the bottom of the vertical slide groove, an overflow plate is installed with a sliding seal in the vertical slide groove, the upper end of the overflow plate is fixedly connected to the lower end of the valve stem, and the upper end of the valve stem passes through the valve body to connect the lifting actuator.

[0012] For further improvement, a pressure relief channel is provided between the receiving groove and the overflow port.

[0013] To be further improved, the feeding system includes a wastewater tank and an infusion device, the infusion device is arranged between the wastewater tank and the feeding tank, and the drain valve and the overflow valve are both connected to the wastewater tank through a reflux pipe.

[0014] The beneficial effects of the present invention are: (1) The present invention includes a drum dryer and a dehumidification system, which can dry and solidify the viscous wastewater after nickel plating. The dried material can be used as raw materials for manufacturing high-standard cement and fertilizers, thereby realizing the environmentally friendly recycling of nickel plating wastewater. The harmful gases generated by the wastewater can be purified by the dehumidification system and then discharged into the air, thereby achieving environmental protection purposes.

[0015] (2) The blade of the scraper device can be rotated to change the blade, which improves the efficiency of blade replacement and reduces the cost of downtime maintenance.

[0016] (3) The blade can make linear reciprocating motion on the tool holder through the sliding drive cylinder, so that the two ends of the excessively long blade can automatically participate in the normal wear of the contact with the roller, saving the trouble of regular manual grinding and solving the problem that the protruding parts of the blade at both ends cannot be worn and easily damage the cylinder.

[0017] (4) The material thickness detection system can detect the thickness of the dry material on the surface of the drying drum at the upstream and downstream positions of the blade, which can prevent the scraper from damaging the drum surface when there is no dry material attached to the drum surface, and facilitate the adjustment of the scraper fitting pressure;

[0018] (5) The drum is equipped with isolation tubes, interlayers and other structures inside, which speeds up the efficiency of preheating the drum surface before work and cooling after work;

[0019] (6) Liquid level control in the trough is very important. The liquid level control system can easily adjust the liquid level in the trough through the overflow valve and accurately control the distance that the roller is immersed in the liquid level. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a diagram of the equipment layout of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a drum dryer;

[0022] Figure 3 is a schematic diagram of the structure of the tool holder;

[0023] Figure 4 It is a structural diagram of the material thickness detection system;

[0024] Figure 5 It is a structural schematic diagram of the overflow valve;

[0025] Description of the accompanying drawings: 1. drum dryer, 11. material trough, 12. drying drum, 121. isolation cylinder, 122. interlayer, 123. ventilation groove, 13. blade, 131. positioning groove, 14. knife holder, 141. fixed bracket, 142. rotary bracket, 143. mounting slot, 144. hollow hole, 15. pressing cylinder, 16. unloading hopper, 17. sliding drive cylinder, 171. positioning protrusion, 18. fixed pipe, 181. air inlet valve, 182. air outlet valve, 183. vacuum pump, 184. air inlet pipe, 185. air outlet pipe, 2. dehumidification system, 21. steam collection hood, 22. spray tower, 23. induced draft fan, 24. First pipeline, 25. Second pipeline, 3. Feeding system, 31. Wastewater tank, 32. Infusion device, 4. Steam device, 41. Steam inlet main pipe, 42. Drain pipe, 5. Material thickness detection system, 51. Control module, 52. Sensor bracket, 53. First distance measuring sensor, 54. Second distance measuring sensor, 55. Sliding bracket, 56. Linkage rod, 6. Liquid level control system, 61. Drain valve, 62. Overflow valve, 621. Valve body, 622. Valve stem, 623. Overflow plate, 624. Overflow port, 625. Overflow port, 626. Vertical slide, 627. Receiving tank, 628. Lifting actuator, 629. Pressure relief channel. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings:

[0027] See attached Figure 1-2 :In this embodiment 1, an environmental protection treatment device for chemical nickel plating wastewater includes a drum dryer 1 and a dehumidification system 2. The drum dryer 1 includes a material trough 11, a drying drum 12 and a scraper device. The material trough 11 is connected to the feeding system 3. The drying drum 12 is rotatably installed above the material trough 11. One end of the drying drum 12 is connected to the steam device 4 through a rotary joint. The steam device 4 includes a steam inlet main pipe 41 and a drain pipe 42. The scraper device is arranged on one side of the drying drum 12. The scraper device includes a blade 13, a knife holder 14 and a pressing cylinder 15. The pressing cylinder 15 is connected to the pneumatic Control system, the telescopic end of the pressing cylinder 15 is fixedly connected to the tool holder 14, the blade 13 is detachably fixedly mounted on the tool holder 14, a discharge hopper 16 is provided below the blade 13, the blade 13 is tightly fitted with the outer surface of the drying drum 12 under the pressure of the pressing cylinder 15, the dehumidification system 2 includes a steam collecting hood 21, a spray tower 22 and an induced draft fan 23, the steam collecting hood 21 is arranged directly above the drying drum 12, the steam collecting hood 21 is connected to the bottom of the spray tower 22 through a first pipe 24, and the top of the spray tower 22 is connected to the induced draft fan 23 through a second pipe 25.

[0028] Working principle: The first step is preparation before operation. Before operation, make sure that all relevant parameters of the roller are adjusted in place, there is no foreign matter on the roller surface, and the scraper is in good condition;

[0029] The second step is to preheat the drum. Start the main motor to drive the drying drum 12 to rotate, open the steam valve of the steam device 4, and deliver high-temperature steam to the drying drum 12 through the steam inlet main pipe 41. It takes about 20 minutes to reach the specified pressure (confirm that the drum surface temperature reaches the specified value). The drain pipe 42 is used to discharge condensed water from the drying drum 12.

[0030] The third step is the feeding process. Start the feeding system 3 and start feeding into the trough 11. During the initial operation, the feeding speed should be adjusted according to the production requirements. After observing that the raw material adheres to the surface of the drying drum 12, start the pressing cylinder 15 to press the blade 13 onto the surface of the drying drum 12. Adjust the liquid level in the trough 11 according to the depth of the drum immersion. The liquid level control in the trough is very important. Normally, the drum immersion level is controlled to be about 15 mm, which can be adjusted according to production requirements.

[0031] The fourth step is to rotate the drying drum 12 filled with steam inside to transfer heat to the surface of the drum. The slurry to be dried is allowed to adhere thinly (film-like) to the surface of the heated drying drum 12. The drying drum 12 completes the drying process within one rotation cycle. The dried material is continuously scraped off the drum surface by the blade 13 to complete the drying. The dried material falls into the discharge hopper 16 and is collected by a bag. The drum dryer can dry and solidify the viscous wastewater after nickel plating. The dried material can be used as raw material for the manufacture of high-standard cement and fertilizers, thereby realizing the environmentally friendly recycling of nickel plating wastewater.

[0032] Step 5: Steam discharge. Start the induced draft fan 23, and the steam collecting hood 21 absorbs the gas evaporated from the drying drum 12. The steam is input into the spray tower 22 through the first pipe 24 for purification, and finally discharged into the atmosphere through the second pipe 25. The spray tower 22 is also called a spray tower or a spray tower. It is a simple tower-type gas-liquid mass transfer equipment. The spray tower 22 is a hollow cylinder with a liquid sprayer on the top, which disperses the liquid into fine droplets and descends. The gas contacts the droplets in a countercurrent manner for mass transfer. This equipment has a simple structure, low cost, and small gas pressure drop. It is used for the absorption of soluble gases and can also be used for gas washing.

[0033] Step 6: Stop the equipment. Stop feeding. When no product is observed to be attached to the surface of the drum, press the cylinder 15 to remove the scraper. Drain the excess in the trough. After the steam is turned off, the drum should continue to rotate at a low speed to allow the drum to cool during the rotation. When the surface temperature of the drum is detected to drop to about 80°C, turn off the main drive motor. When no material is observed to be discharged, turn off other supporting equipment in the system in sequence.

[0034] As attached Figure 3 As shown, in Example 2, on the basis of Example 1, the tool holder 14 includes a fixed bracket 141 and a swivel bracket 142, the fixed bracket 141 is fixedly connected to the clamping cylinder 15, the swivel bracket 142 is rotatably mounted on the fixed bracket 141, at least two mounting slots 143 are circumferentially distributed on the swivel bracket 142, the blade 13 is mounted on the mounting slot 143, and one end of the swivel bracket 142 is connected to a dividing motor. When the blade is worn, the clamping cylinder 15 is controlled to drive the fixed bracket 141 to move, and the blade 13 is removed from the drum. Starting the dividing motor can drive the swivel bracket 142 to rotate for blade changing operations, thereby shortening the maintenance time, and the worker can replace the old blade. In addition, the swivel bracket 142 can easily adjust the scraper position, find a suitable scraper inclination angle, and improve the scraping effect.

[0035] Preferably, a positioning groove 131 is provided on the back of the blade 13, and a hollow hole 144 is provided at a position corresponding to the positioning groove 131 on the mounting slot 143. A sliding drive cylinder 17 is provided at the other end of the slewing bracket 142. The sliding drive cylinder 17 is connected to a pneumatic control system. A positioning protrusion 171 is provided on an output rod of the sliding drive cylinder 17. The positioning protrusion 171 is matched with the positioning groove 131 in a concave-convex manner. Due to manufacturing requirements, the length of the blade is about 30 mm longer than the roller. During the operation of the equipment, the blade protrudes from the roller on both sides. The blade will wear normally at the contact point with the roller, but the protruding parts on both sides cannot wear and should be polished regularly to prevent damage to the cylinder body. When the sliding drive cylinder 17 is extended or retracted, it can drive the blade 13 to slide axially on the mounting slot 143, thereby automatically polishing and utilizing the two ends of the blade, thereby extending the service life of the blade. A telescopic adjustment rod (such as a linear module such as an electromagnetic telescopic rod) can also be arranged between the output rod of the sliding drive cylinder 17 and the positioning protrusion 171, so as to facilitate the control of the positioning protrusion 171 to be inserted into or pulled out of the positioning groove 131, thereby further realizing automation.

[0036] As attached Figure 3-4As shown, it also includes a material thickness detection system 5, which includes a control module 51, a sensor bracket 52, and a first distance sensor 53 and a second distance sensor 54 fixed on the sensor bracket 52. The first distance sensor 53 and the second distance sensor 54 are respectively arranged at the upstream and downstream positions of the blade 13, and are used to detect the thickness of the dry material adhered to the surface of the drying drum 12. The first distance sensor 53 and the second distance sensor 54 are electrically connected to the control module 51, and the control module 51 is electrically connected to the pneumatic control system. The sensor bracket 52 is slidably installed on the sliding bracket 55, and the sliding drive cylinder 17 is a cylinder with a double-headed output rod. The other output rod of the sliding drive cylinder 17 is connected to the sensor bracket 52 through a linkage rod 56. The first distance sensor 53 and the second distance sensor 54 use laser sensors, which can optically measure the distance to the surface of the drying drum 12 and feed the data back to the control module 51. The difference between the two values ​​is the thickness scraped by the scraper, and the absolute value of the difference between the distance value when the drying drum 12 is smooth is the thickness of the dry material adhered to the upstream and downstream surfaces of the drying drum 12. The fitting effect of the scraper and the cylinder is achieved by adjusting the compressed air pressure. The control module 51 can then send a control command to the pneumatic control system. According to the data collected on the material thickness, the pressing force of the blade 13 can be accurately controlled, and the scraping thickness can be adjusted to avoid scraping too much or too little, which may damage the scraper and the drum. The other output rod of the sliding drive cylinder 17 drives the sensor bracket 52 to slide axially on the sliding bracket 55 through the linkage rod 56, so that the first distance sensor 53 and the second distance sensor 54 can collect the thickness values ​​at different positions on the drum surface, thereby improving the measurement accuracy. The problem of inconsistent distance between the blade and the two sides of the drum can be discovered in time.

[0037] As attached Figure 2 As shown, in Example 4, on the basis of Example 1, an isolation cylinder 121 is coaxially mounted inside the drying drum 12, and an interlayer 122 is provided between the isolation cylinder 121 and the inner wall of the drying drum 12, and the interlayer 122 is connected to the steam inlet main pipe 41 and the drain pipe 42. The isolation cylinder 121 can reduce the space inside the drying drum 12, so that the steam can quickly fill the interlayer 122, quickly heat the surface of the drying drum 12, and improve the heat exchange efficiency. The condensed water can quickly pass through the interlayer 122 and the drain pipe 42 and be discharged to the outside of the drying drum 12, reducing the amount of water retained inside the drying drum 12, thereby improving the heating effect on the material. The isolation cylinder 121 and the drying drum 12 can rotate relative to each other, so that the steam can fully contact the drying drum 12, and achieve faster heating.

[0038] Preferably, one end of the isolation cylinder 121 is connected to a fixed pipe 18, which passes through the outside of the isolation cylinder 121. The fixed pipe 18 is fixedly connected to an external device, and can fix the isolation cylinder 121. A plurality of ventilation grooves 123 are provided on the upper surface of the isolation cylinder 121, and one end of the ventilation groove 123 is connected to the end surface of the isolation cylinder 121 located on the side of the steam inlet manifold 41. The ventilation grooves 123 can increase the space on the upper side of the isolation cylinder 121, making it convenient for steam to quickly flow through and contact the upper surface of the drying drum 12. The ventilation grooves 123 can also facilitate the condensed water to flow downward to avoid it being retained in the upper interlayer 122 to hinder steam heating. The ventilation grooves 123 are recessed on the surface of the isolation cylinder 121, which can increase the gas flow rate at this location when the drying drum 12 rotates, thereby improving the heat exchange efficiency.

[0039] Preferably, an air inlet valve 181 and an air outlet valve 182 are provided at one end of the fixed pipe 18, which can be opened and closed freely, and the air outlet valve 182 is connected to the vacuum pump 183. An air inlet pipe 184 and an air outlet pipe 185 are provided in the fixed pipe 18, and one end of the air inlet pipe 184 and the air outlet pipe 185 are respectively connected to the air inlet valve 181 and the air outlet valve 182, and the other ends of the air inlet pipe 184 and the air outlet pipe 185 are respectively extended to the upper and lower sides of the interior of the isolation cylinder 121, so that convection can be formed during ventilation. During operation, the vacuum pump 183 can evacuate the isolation cylinder 121 to improve its thermal insulation performance, so that the steam temperature contacted by the upper side of the drying drum 12 is higher, and the drying effect is better, while the temperature of the condensed water contacted by the lower side is lower, and it is not easy to evaporate the waste water in the trough quickly, thereby avoiding heat loss and gas not being collected by the steam collection hood 21 (steam leakage pollution). After the equipment is shut down, the air inlet valve 181 can be opened to let in cold air, and the drying drum 12 can be quickly cooled down by air cooling circulation in the isolation cylinder 121. Of course, if the vacuum pump 183 is replaced by a water pump, hot oil can be introduced into the isolation cylinder 121 during operation to enhance the drying effect of the drying drum 12 and save energy. After operation, the hot oil can be extracted or cold oil can be introduced to achieve the purpose of rapid cooling.

[0040] As attached Figure 1 and 5As shown, Example 5, on the basis of Example 1, the material trough 11 is provided with a liquid level control system 6, the liquid level control system 6 includes a drain valve 61 and an overflow valve 62, the drain valve 61 is arranged on the bottom wall of the material trough 11, the overflow valve 62 is arranged on the side wall of the material trough 11, the overflow valve 62 includes a valve body 621, a valve stem 622 and an overflow plate 623, the inner wall of the valve body 621 is provided with an overflow channel, the two ends of the overflow channel are respectively provided with an overflow port 624 and an overflow port 625, the overflow port 624 is connected to the side wall of the material trough 11, the height of the overflow port 624 is greater than the height of the overflow port 625, a vertical slide groove 626 is provided in the middle of the overflow channel, a receiving groove 627 is provided at the bottom of the vertical slide groove 626, an overflow plate 623 is installed in the vertical slide groove 626 in a sliding seal, the upper end of the overflow plate 623 is fixedly connected to the lower end of the valve stem 622, and the upper end of the valve stem 622 passes through the valve body 621 to connect with the lifting actuator 628. For the sake of convenience, a scale or a liquid level sensor can also be provided on the material tank 11 to measure the liquid level. When the liquid level is too high, the lifting actuator 628 controls the overflow plate 623 to move down to the desired height. When the upper end of the overflow plate 623 is lower than the liquid level, the waste water on the overflow port 624 automatically flows to the overflow port 625, thereby keeping the liquid level consistent with the upper end of the overflow plate 623. When the liquid level is too low, the lifting actuator 628 controls the overflow plate 623 to move up to the desired height, and the liquid level automatically rises to keep consistent with the upper end of the overflow plate 623.

[0041] A pressure relief channel 629 is provided between the receiving groove 627 and the overflow port 624 to facilitate the medium to flow between the receiving groove 627 and the overflow port 624, so that the overflow plate 623 can move up and down more smoothly, the valve sealing performance is better, and it is not easy to leak.

[0042] The feeding system 3 includes a wastewater trough 31 and an infusion device 32. The infusion device 32 is arranged between the wastewater trough 31 and the material trough 11. The wastewater is continuously pumped into the material trough 11 through a pump and a pipeline. The drain valve 61 and the overflow valve 62 are both connected to the wastewater trough 31 through a reflux pipe, and the bottom of the material trough and the overflowed materials can flow back to the wastewater trough 31 to avoid leakage and pollution of the environment.

[0043] Although the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. An environmentally friendly treatment device for chemical nickel plating wastewater, comprising a drum dryer (1) and a dehumidification system (2), characterized in that: The drum dryer (1) comprises a material trough (11), a drying drum (12) and a scraper device, wherein the material trough (11) is connected to a material supply system (3), a drying drum (12) is rotatably mounted above the material trough (11), one end of the drying drum (12) is connected to a steam device (4) via a rotary joint, the steam device (4) comprises a steam inlet main pipe (41) and a drain pipe (42), the scraper device is arranged on one side of the drying drum (12), the scraper device comprises a blade (13), a knife holder (14) and a pressing cylinder (15), the pressing cylinder (15) is connected to a pneumatic control system, and the telescopic end of the pressing cylinder (15) is fixedly connected to the knife holder (14), a blade (13) is detachably fixedly mounted on the blade holder (14), a discharge hopper (16) is provided below the blade (13), the blade (13) is tightly fitted with the outer surface of the drying drum (12) under the pressure of the pressing cylinder (15), the dehumidification system (2) comprises a steam collection hood (21), a spray tower (22) and an induced draft fan (23), the steam collection hood (21) is arranged directly above the drying drum (12), the steam collection hood (21) is connected to the bottom of the spray tower (22) via a first pipe (24), and the top of the spray tower (22) is connected to the induced draft fan (23) via a second pipe (25); The tool holder (14) comprises a fixed bracket (141) and a swivel bracket (142); the fixed bracket (141) is fixedly connected to the pressing cylinder (15); the swivel bracket (142) is rotatably mounted on the fixed bracket (141); the swivel bracket (142) has at least two mounting slots (143) distributed in a circumferential direction; the blade (13) is mounted on the mounting slot (143); and one end of the swivel bracket (142) is connected to a dividing motor; A positioning groove (131) is provided on the back of the blade (13), and a hollow hole (144) is provided on the mounting slot (143) at a position corresponding to the positioning groove (131). A sliding drive cylinder (17) is provided at the other end of the rotary bracket (142), and the sliding drive cylinder (17) is connected to a pneumatic control system. A positioning protrusion (171) is provided on an output rod of the sliding drive cylinder (17), and the positioning protrusion (171) is matched with the positioning groove (131) in a concave-convex manner.

2. The environmental protection treatment device for chemical nickel plating wastewater according to claim 1 is characterized in that: The material thickness detection system (5) is also included. The material thickness detection system (5) includes a control module (51), a sensor bracket (52), and a first distance sensor (53) and a second distance sensor (54) fixed to the sensor bracket (52). The first distance sensor (53) and the second distance sensor (54) are respectively arranged at upstream and downstream positions of the blade (13) and are used to detect the thickness of the dry material adhered to the surface of the drying drum (12). The first distance sensor (53) and the second distance sensor (54) are electrically connected to the control module (51), and the control module (51) is electrically connected to the pneumatic control system. The sensor bracket (52) is slidably mounted on the sliding bracket (55). The sliding drive cylinder (17) is a cylinder with a double-headed output rod. The other output rod of the sliding drive cylinder (17) is connected to the sensor bracket (52) via a linkage rod (56).

3. The environmental protection treatment device for chemical nickel plating wastewater according to claim 1 is characterized in that: An isolation cylinder (121) is coaxially mounted inside the drying drum (12), an interlayer (122) is provided between the isolation cylinder (121) and the inner wall of the drying drum (12), and the interlayer (122) is connected to the steam inlet main pipe (41) and the drainage pipe (42).

4. The environmental protection treatment device for chemical nickel plating wastewater according to claim 3 is characterized in that: One end of the isolation cylinder (121) is connected to a fixed pipe (18), the fixed pipe (18) passing through the outside of the isolation cylinder (121), a plurality of ventilation grooves (123) are provided on the upper surface of the isolation cylinder (121), one end of the ventilation grooves (123) is in communication with an end surface of the isolation cylinder (121) located on a side of the steam inlet manifold (41).

5. The environmental protection treatment device for chemical nickel plating wastewater according to claim 4 is characterized in that: An air inlet valve (181) and an air outlet valve (182) are provided at one end of the fixed tube (18), and the air outlet valve (182) is connected to a vacuum pump (183). An air inlet pipe (184) and an air outlet pipe (185) are provided inside the fixed tube (18), and one end of the air inlet pipe (184) and the air outlet pipe (185) are connected to the air inlet valve (181) and the air outlet valve (182) respectively, and the other ends of the air inlet pipe (184) and the air outlet pipe (185) are respectively extended to the upper and lower sides of the interior of the isolation tube (121).

6. The environmental protection treatment device for chemical nickel plating wastewater according to claim 1, characterized in that: The material tank (11) is provided with a liquid level control system (6), the liquid level control system (6) comprising a drain valve (61) and an overflow valve (62), the drain valve (61) being arranged on the bottom wall of the material tank (11), the overflow valve (62) being arranged on the side wall of the material tank (11), the overflow valve (62) comprising a valve body (621), a valve stem (622) and an overflow plate (623), an overflow channel being arranged on the inner wall of the valve body (621), and an overflow port (624) and an overflow port (623) being arranged at both ends of the overflow channel. 5), the overflow port (624) is connected to the side wall of the material trough (11), the height of the overflow port (624) is greater than the height of the overflow port (625), a vertical slide groove (626) is provided in the middle of the overflow channel, a receiving groove (627) is provided at the bottom of the vertical slide groove (626), an overflow plate (623) is installed in the vertical slide groove (626) in a sliding seal, the upper end of the overflow plate (623) is fixedly connected to the lower end of the valve stem (622), and the upper end of the valve stem (622) passes through the valve body (621) and is connected to the lifting actuator (628).

7. The environmental protection treatment device for chemical nickel plating wastewater according to claim 6 is characterized in that: A pressure relief channel (629) is provided between the receiving groove (627) and the overflow port (624).

8. The environmental protection treatment device for chemical nickel plating wastewater according to claim 6 is characterized in that: The feeding system (3) comprises a wastewater tank (31) and an infusion device (32), wherein the infusion device (32) is arranged between the wastewater tank (31) and the material tank (11), and the drain valve (61) and the overflow valve (62) are both connected to the wastewater tank (31) via a return pipe.

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