A paint spraying wastewater recycling system

Abstract

The present invention belongs to the technical field of resource recycling, and in particular, relates to a paint spraying wastewater reuse system, including a sedimentation tank, the side wall of the sedimentation tank is symmetrically fixedly connected with an inlet pipe and an outlet pipe, a pump and an ultrafiltration membrane assembly are installed on the outlet pipe, a water pipe located between the pump and the ultrafiltration membrane assembly is also installed on the outlet pipe, a security filter is installed on the water pipe, and solenoid valves are installed on the pipe wall at the connection between the outlet pipe and the water pipe. The present invention can automatically control the amount of chemical agents added based on the inlet flow rate, thereby better meeting the treatment requirements of paint spraying wastewater, can automatically select whether to connect to the security filter for use based on the concentration of pollutants in the paint spraying wastewater, reduce the cleaning and replacement frequency of the inner membrane surface of the ultrafiltration membrane assembly, can automatically calculate the replacement time of the filter element in the security filter, and automatically adjust the prompt frequency based on the pumping speed and the concentration of pollutants in the paint spraying wastewater.

Description

Technical Field

[0001] The invention belongs to the technical field of resource recycling, and in particular relates to a paint spraying wastewater recycling system. Background Art

[0002] Paint spraying wastewater is a kind of wastewater containing complex pollutants generated in the process of painting. The paint spraying wastewater reuse system is a comprehensive facility used to treat paint spraying wastewater and make it available for reuse. By reusing paint spraying wastewater, it can reduce the company's demand for fresh water, reduce the company's water costs, and reduce wastewater discharge, alleviating pressure on the environment.

[0003] At present, in the treatment process of paint spraying wastewater, it is necessary to add chemical agents to the pre-treated wastewater to make the pollutants in the wastewater condense and precipitate, and then use membrane separation technology through ultrafiltration membrane components to intercept tiny particles and ions. However, when using membrane separation technology, the membrane surface is easily blocked and contaminated by pollutants, resulting in reduced membrane flux. Frequent cleaning and replacement of membrane components greatly increase the operating cost. For this reason, a security filter is often added to the front end of the ultrafiltration membrane component to remove large particles that may damage the membrane, thereby reducing the frequency of cleaning and replacement of the membrane surface. However, when the wastewater sent to the ultrafiltration membrane component is relatively stable after preliminary treatment, and the potential harm to the membrane is small, the necessity of setting up the security filter is reduced. If the security filter is still connected at this time, it will cause water flow pressure loss, resulting in increased pumping power and increased energy consumption, which seriously affects the treatment effect and use efficiency of paint spraying wastewater. Summary of the invention

[0004] The purpose of the present invention is to provide a paint spraying wastewater recycling system in view of the above problems.

[0005] To achieve the above object, the present invention adopts the following technical scheme: a paint spraying wastewater reuse system, comprising a sedimentation tank, the side wall of the sedimentation tank is symmetrically fixedly connected with an inlet pipe and an outlet pipe, a pump and an ultrafiltration membrane assembly are installed on the outlet pipe, a water pipe located between the pump and the ultrafiltration membrane assembly is also installed on the outlet pipe, a security filter is installed on the water pipe, and a solenoid valve is installed on the pipe wall at the connection between the outlet pipe and the water pipe, and further comprising:

[0006] A water inlet flow rate detection mechanism is installed on the water inlet pipe;

[0007] A full-scale pesticide application mechanism is fixedly installed on the sedimentation tank, the full-scale pesticide application mechanism and the water inlet flow rate detection mechanism are connected through a reduction gear box, and the reduction gear box is fixedly installed on the outer wall of the sedimentation tank;

[0008] A flow rate feedback control mechanism, fixedly mounted on the outer wall of the sedimentation tank, for controlling the working power of the overall application mechanism;

[0009] A wastewater concentration detection mechanism is fixedly mounted on the outer wall of the sedimentation tank and the wall of the outlet pipe;

[0010] A concentration feedback control mechanism is fixedly mounted on the wastewater concentration detection mechanism;

[0011] The prompting mechanism is fixedly mounted on the wastewater concentration detecting mechanism and is used to prompt the replacement of the filter element in the safety filter.

[0012] In the above-mentioned paint wastewater reuse system, the water inlet flow rate detection mechanism includes a detection shell fixedly mounted on the water inlet pipe, a transmission shaft is rotatably connected inside the detection shell, a water wheel is fixedly sleeved on the shaft wall of the transmission shaft located inside the detection shell, the upper end of the transmission shaft is fixedly connected to the input end of the reduction gear box, a micro-generator is fixedly mounted on the lower end of the detection shell, and the lower end of the transmission shaft is fixedly connected to the input end of the micro-generator.

[0013] In the above-mentioned paint wastewater reuse system, the comprehensive drug application mechanism includes two side plates symmetrically fixedly connected to the outer wall of the upper end of the sedimentation tank, a reciprocating screw is rotatably connected between the two side plates, one end of the reciprocating screw is fixedly connected to the output end of the reduction gear box, an L-shaped support plate is threadedly sleeved on the rod wall of the reciprocating screw, a spray head is fixedly installed at the lower end of the horizontal part of the L-shaped support plate, the upper end of the spray head is fixedly connected to a spray pipe, a spray pump is installed on the spray pipe, and the spray pump is fixedly installed outside the L-shaped support plate.

[0014] In the above-mentioned paint wastewater reuse system, the flow velocity feedback control mechanism includes a flow velocity feedback shell, the inner wall of the flow velocity feedback shell is fixedly connected to a plurality of limit slide bars arranged side by side, the plurality of limit slide bars are externally slidably sleeved with the same force-bearing plate, the side wall of the force-bearing plate is fixedly connected to a pushing permanent magnet plate, the inner wall of the flow velocity feedback shell is fixedly provided with a pushing electromagnetic plate arranged corresponding to the position of the pushing permanent magnet plate, the force-bearing plate and the flow velocity feedback shell are fixedly connected on the opposite side with a plurality of return springs sleeved on the outside of the limit slide bar, a plurality of power conversion switches equidistantly distributed are fixedly provided on one side of the inner wall of the flow velocity feedback shell, one end of the force-bearing plate is fixedly connected with a pushing round head arranged corresponding to the position of the power conversion switch, and the micro generator is electrically connected to the pushing electromagnetic plate.

[0015] In the above-mentioned paint wastewater reuse system, the wastewater concentration detection mechanism includes an electric slide rail fixedly mounted on the outer wall of the sedimentation tank, the electric slide rail is arranged longitudinally, one end of the slider in the electric slide rail is fixedly connected to a receiving box, a sampling tube located on the upper side of the receiving box is fixedly mounted on the wall of the outlet pipe, a drainage pipe is fixedly connected to the lower end of the receiving box, and electric control valves are installed on the sampling tube and the drainage pipe, an L-shaped extension plate is fixedly connected to the outer wall of the receiving box, and an electric push rod is fixedly inserted in the vertical part of the L-shaped extension plate, and the The output end of the electric push rod is fixedly connected to a mounting shell, a socket is provided on a side of the mounting shell away from the electric push rod, and a compensation rod is movably sleeved in the corresponding socket, one end of the compensation rod is fixedly connected to a detection plate extending into the receiving box, one end of the compensation rod located in the mounting shell is fixedly connected to a compensation block, a compensation spring sleeved on the outside of the compensation rod is fixedly connected between the compensation block and the mounting shell, an electric connection strip arranged on the rear side is fixedly connected to the bottom of the inner wall of the mounting shell, and a conductive block corresponding to the position of the electric connection strip is fixedly connected to the lower end of the compensation block.

[0016] In the above-mentioned paint wastewater reuse system, the concentration feedback control mechanism includes an insulating shell fixedly mounted on the upper end of the mounting shell, a plurality of resistance rods arranged side by side are fixedly connected inside the insulating shell, and a plurality of resistance rods are externally slidably sleeved with the same sliding seat, a resistance rod is fixedly mounted on the upper side of the inner wall of the insulating shell, a conductive contact electrically in contact with the resistance rod is fixedly connected to the upper end of the sliding seat, a toggle plate is fixedly connected to the lower end of the sliding seat, a return permanent magnet plate is fixedly connected to the side wall of the toggle plate, a return electromagnetic plate arranged opposite to the return permanent magnet plate is fixedly mounted on the inner wall of the insulating shell, a push plate is fixedly connected to the upper end of the compensation block, a strip through-hole is provided at the upper end of the mounting shell for the push plate to extend through the upper end, and the push plate is arranged on one side of the toggle plate.

[0017] In the above-mentioned paint wastewater reuse system, the prompt mechanism includes a prompt circular shell fixedly mounted on the lower side of the L-shaped extension plate, a rotating shaft is rotatably connected to the center of the inner wall of the prompt circular shell, a reduction motor for driving the rotating shaft to rotate is fixedly mounted on the lower end of the prompt circular shell, a prompt switch is fixedly mounted on one side of the inner wall of the prompt circular shell, an arc-shaped pressing block is fixedly connected to the shaft wall of the rotating shaft, and a warning device is fixedly mounted on the outer wall of the prompt circular shell.

[0018] In the above-mentioned paint spraying wastewater recycling system, a guide slide rod is fixedly installed between the two side plates, and the side wall of the L-shaped support plate is provided with a guide slide hole slidably connected to the guide slide rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Through the settling tank, water inlet flow rate detection mechanism, comprehensive application mechanism, and flow rate feedback control mechanism, the chemical agents can be added automatically and quickly, and the amount of chemical agents added can be automatically controlled based on the water inlet flow rate, thereby better meeting the treatment needs of paint wastewater.

[0021] 2. Through the wastewater concentration detection mechanism, concentration feedback control mechanism, water pipe and safety filter, it can automatically select whether to connect to the safety filter for use based on the pollutant concentration of the paint wastewater, reduce the cleaning and replacement frequency of the inner membrane surface of the ultrafiltration membrane component, ensure the performance of the ultrafiltration membrane component, and when it is judged that the necessity of setting up the safety filter is low, the safety filter is not connected for use, avoiding unnecessary use to cause water pressure loss, thereby increasing pumping power and thus increasing energy consumption.

[0022] 3. Through the set reminder mechanism, the replacement time of the filter element in the security filter can be automatically calculated, and the reminder frequency can be automatically adjusted based on the pumping speed and the pollutant concentration of the paint wastewater, ensuring that the filter element in the security filter can be replaced in time to ensure the treatment quality of the paint wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a schematic cross-sectional view of the water inlet flow rate detection mechanism of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the comprehensive pesticide application mechanism of the present invention;

[0026] Figure 4 It is a schematic cross-sectional structural diagram of the flow rate feedback control mechanism of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the wastewater concentration detection mechanism of the present invention;

[0028] Figure 6 yes Figure 5 Enlarged view of the middle part;

[0029] Figure 7 It is a schematic cross-sectional view of the concentration feedback control mechanism of the present invention;

[0030] Figure 8 It is a schematic cross-sectional structural diagram of the prompting mechanism of the present invention.

[0031] In the figure: 1 sedimentation tank, 2 water inlet flow rate detection mechanism, 21 detection shell, 22 transmission shaft, 23 water wheel, 24 micro generator, 3 full spraying mechanism, 31 side plate, 32 reciprocating screw rod, 33 L-shaped support plate, 34 spray head, 35 spray pipe, 36 spray pump, 37 guide slide bar, 4 flow rate feedback control mechanism, 41 flow rate feedback shell, 42 limit slide bar, 43 force plate, 44 push permanent magnetic plate, 45 push electromagnetic plate, 46 reset spring, 47 power conversion switch, 48 push round head, 5 wastewater concentration detection mechanism, 51 electric slide rail, 52 receiving box, 53 sampling tube, 54 drainage pipe, 55 L-shaped extension plate, 56 electric push rod, 57 mounting shell, 58 compensation rod, 59 detection plate, 510 compensation block, 511 compensation spring, 512 electrical connection strip, 513 conductive block, 6 concentration feedback control mechanism, 61 insulating shell, 62 resistance rod, 63 sliding seat, 64 resistance rod, 65 conductive contact piece, 66 toggle plate, 67 return permanent magnet plate, 68 return electromagnetic plate, 69 push plate, 7 prompt mechanism, 71 prompt round shell, 72 rotating shaft, 73 reduction motor, 74 prompt switch, 75 arc-shaped pressing block, 76 alarm, 8 water inlet pipe, 9 water outlet pipe, 10 pump, 11 ultrafiltration membrane assembly, 12 water pipe, 13 security filter, 14 reduction gear box. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] like Figure 1-Figure 8 As shown, a paint spraying wastewater recycling system includes a sedimentation tank 1, the side wall of the sedimentation tank 1 is symmetrically fixedly connected with an inlet pipe 8 and an outlet pipe 9, a pump 10 and an ultrafiltration membrane assembly 11 are installed on the outlet pipe 9, a water pipe 12 located between the pump 10 and the ultrafiltration membrane assembly 11 is also installed on the outlet pipe 9, a security filter 13 is installed on the water pipe 12, and a solenoid valve is installed on the pipe wall at the connection between the outlet pipe 9 and the water pipe 12, and further includes:

[0034] The water inlet flow rate detection mechanism 2 is installed on the water inlet pipe 8. The water inlet flow rate detection mechanism 2 includes a detection shell 21 fixedly installed on the water inlet pipe 8. A transmission shaft 22 is rotatably connected inside the detection shell 21. The transmission shaft 22 is located inside the detection shell 21 and has a water wheel 23 fixedly sleeved on its shaft wall. The upper end of the transmission shaft 22 is fixedly connected to the input end of the reduction gear box 14. A micro-generator 24 is fixedly installed at the lower end of the detection shell 21. The lower end of the transmission shaft 22 is fixedly connected to the input end of the micro-generator 24, so that the introduction speed of the paint wastewater can be monitored in real time.

[0035] The full-scale pesticide application mechanism 3 is fixedly installed on the sedimentation tank 1. The full-scale pesticide application mechanism 3 and the water inlet flow rate detection mechanism 2 are connected through a reduction gear box 14. The reduction gear box 14 is fixedly installed on the outer wall of the sedimentation tank 1. The full-scale pesticide application mechanism 3 includes two side plates 31 symmetrically fixedly connected to the outer wall of the upper end of the sedimentation tank 1. A reciprocating screw rod 32 is rotatably connected between the two side plates 31. One end of the reciprocating screw rod 32 is fixedly connected to the output end of the reduction gear box 14. The rod wall of the reciprocating screw rod 32 is threadedly sleeved with an L-shaped support plate 33. The L-shaped support plate 3 A spray head 34 is fixedly installed at the lower end of the horizontal part of 3, and a spray pipe 35 is fixedly connected to the upper end of the spray head 34. A spray pump 36 is installed on the spray pipe 35. The spray pump 36 is fixedly installed outside the L-shaped support plate 33. A guide slide bar 37 is also fixedly installed between the two side plates 31. The side wall of the L-shaped support plate 33 is provided with a guide slide hole slidably connected to the guide slide bar 37, which can automatically and quickly add chemicals and can automatically adjust the amount of chemicals added based on the water inlet flow rate, thereby better meeting the treatment requirements of spray paint wastewater.

[0036] The flow velocity feedback control mechanism 4 is fixedly mounted on the outer wall of the sedimentation tank 1 and is used to control the working power of the comprehensive application mechanism 3. The flow velocity feedback control mechanism 4 includes a flow velocity feedback shell 41. The inner wall of the flow velocity feedback shell 41 is fixedly connected to a plurality of limit slide bars 42 arranged side by side. The plurality of limit slide bars 42 are slidably sleeved with the same force plate 43. The side wall of the force plate 43 is fixedly connected to a pushing permanent magnet plate 44. The inner wall of the flow velocity feedback shell 41 is fixedly mounted with a pushing electromagnetic plate 45 arranged corresponding to the position of the pushing permanent magnet plate 44. The force plate 43 and the flow velocity feedback shell 41 are fixedly connected on one side opposite to each other with a plurality of return springs 46 sleeved on the outside of the limit slide bar 42. A plurality of power conversion switches 47 equidistantly distributed are fixedly mounted on one side of the inner wall of the flow velocity feedback shell 41. One end of the force plate 43 is fixedly connected to a pushing round head 48 arranged corresponding to the position of the power conversion switch 47. The micro generator 24 is electrically connected to the pushing electromagnetic plate 45.

[0037] The wastewater concentration detection mechanism 5 is fixedly mounted on the outer wall of the sedimentation tank 1 and the wall of the outlet pipe 9. The wastewater concentration detection mechanism 5 includes an electric slide rail 51 fixedly mounted on the outer wall of the sedimentation tank 1. The electric slide rail 51 is longitudinally arranged. One end of the slider in the electric slide rail 51 is fixedly connected to a receiving box 52. A sampling tube 53 located on the upper side of the receiving box 52 is fixedly mounted on the wall of the outlet pipe 9. A drainage pipe 54 is fixedly connected to the lower end of the receiving box 52. Both the sampling tube 53 and the drainage pipe 54 are equipped with electric control valves. An L-shaped extension plate 55 is fixedly connected to the outer wall of the receiving box 52. An electric push rod 56 is fixedly inserted in the vertical part of the L-shaped extension plate 55. The output end of the electric push rod 56 is fixedly connected to a mounting shell 57. The mounting shell 57 is away from the electric A socket is provided on one side of the movable push rod 56, and a compensation rod 58 is movably inserted into the corresponding socket, one end of the compensation rod 58 is fixedly connected to a detection plate 59 extending into the receiving box 52, one end of the compensation rod 58 located in the mounting shell 57 is fixedly connected to a compensation block 510, a compensation spring 511 sleeved on the outside of the compensation rod 58 is fixedly connected between the compensation block 510 and the mounting shell 57, an electric connection strip 512 arranged on the rear side is fixedly connected to the bottom of the inner wall of the mounting shell 57, and a conductive block 513 corresponding to the position of the electric connection strip 512 is fixedly connected to the lower end of the compensation block 510, which can further detect and feedback the pollutant concentration of the paint wastewater after chemical precipitation, so as to self-judge whether the safety filter 13 needs to be put into use.

[0038] The concentration feedback control mechanism 6 is fixedly mounted on the wastewater concentration detection mechanism 5. The concentration feedback control mechanism 6 includes an insulating shell 61 fixedly mounted on the upper end of the mounting shell 57. A plurality of resistance rods 62 arranged side by side are fixedly connected inside the insulating shell 61. The plurality of resistance rods 62 are slidably sleeved with the same sliding seat 63 outside. A resistance rod 64 is fixedly mounted on the upper side of the inner wall of the insulating shell 61. A conductive contact 65 electrically in contact with the resistance rod 64 is fixedly connected to the upper end of the sliding seat 63. A toggle plate 66 is fixedly connected to the lower end of the sliding seat 63. A return permanent magnet plate 67 is fixedly connected to the side wall of the toggle plate 66. A return electromagnetic plate 68 arranged opposite to the return permanent magnet plate 67 is fixedly mounted on the inner wall of the insulating shell 61. A push plate 69 is fixedly connected to the upper end of the compensation block 510. A strip-shaped through hole is opened at the upper end of the mounting shell 57 for the push plate 69 to extend through the upper end. The push plate 69 is arranged on one side of the toggle plate 66.

[0039] The prompt mechanism 7 is fixedly mounted on the wastewater concentration detection mechanism 5, and is used to prompt the replacement of the filter element in the security filter 13. The prompt mechanism 7 includes a prompt circular shell 71 fixedly mounted on the lower side of the L-shaped extension plate 55. A rotating shaft 72 is rotatably connected to the center of the inner wall of the prompt circular shell 71. A reduction motor 73 for driving the rotating shaft 72 to rotate is fixedly mounted on the lower end of the prompt circular shell 71. A prompt switch 74 is fixedly mounted on one side of the inner wall of the prompt circular shell 71. An arc-shaped pressing block 75 is fixedly connected to the shaft wall of the rotating shaft 72. An alarm 76 is fixedly mounted on the outer wall of the prompt circular shell 71. The replacement time of the filter element in the security filter 13 can be automatically calculated, and the prompt frequency can be automatically adjusted based on the pumping speed and the pollutant concentration of the paint wastewater, so as to ensure that the filter element in the security filter 13 can be replaced in time and the treatment quality of the paint wastewater can be guaranteed.

[0040] The PLC controller (not shown in the figure) is fixedly installed outside the sedimentation tank 1, and is electrically connected to the water inlet flow rate detection mechanism 2, the comprehensive pesticide application mechanism 3, the flow rate feedback control mechanism 4, the wastewater concentration detection mechanism 5, the concentration feedback control mechanism 6 and the prompt mechanism 7 respectively.

[0041] The operating principle of the present invention is described as follows: the paint spraying wastewater is transported to the sedimentation tank 1 through the water inlet pipe 8. When the water inlet pipe 8 delivers water, the water wheel 23 in the driving detection shell 21 drives the transmission shaft 22 to rotate. The transmission shaft 22 drives the reciprocating screw 32 to rotate through the reduction gear box 14. The L-shaped support plate 33 drives the spray head 34 to move back and forth at the upper end of the sedimentation tank 1 through the threaded sleeve effect of the reciprocating screw 32 and the L-shaped support plate 33. The spray pump 36 cooperates with the spray pipe 35 to transport the chemical flocculation agent stored in the external storage box to the spray head 34 for spraying, and the pollutants in the paint spraying wastewater are flocculated and settled. The pump 10 cooperates with the outlet pipe 9 to transport the wastewater after sedimentation treatment to the ultrafiltration membrane assembly 11, and the membrane separation technology is used to intercept tiny particles and ions to complete the reuse treatment of the paint spraying wastewater.

[0042] When the introduction speed of the paint wastewater needs to be adjusted according to the production plan and the change of the wastewater generation amount to balance the treatment capacity and the wastewater generation amount, the introduction speed of the paint wastewater of the water inlet pipe 8 will change, thereby changing the rotation speed of the water wheel 23. When the introduction speed is accelerated, the rotation speed of the water wheel 23 is accelerated, thereby driving the micro-generator 24 to emit a larger current. The current emitted by the micro-generator 24 is passed into the power supply circuit of the squeezing and pushing electromagnetic plate 45. The squeezing and pushing electromagnetic plate 45 is energized to generate the same and larger magnetism as the squeezing and pushing permanent magnet plate 44, thereby driving the force plate 43 to slide along the limit slide bar 42 to overcome the elastic force of the return spring 46. A larger distance, thereby driving the squeezing and pushing round head 48 to press on the power conversion switch 47 on the further rear side, the power conversion switch 47 controls the working power of the spray pump 36, and the power conversion switch 47 on the further rear side controls the spray pump 36 to work with a greater power, thereby increasing the amount of chemical agents added. Based on the increase in the water inlet speed, the amount of chemical agents applied is further increased to ensure the wastewater treatment performance;

[0043] The power conversion switch 47 synchronously controls the power change of the pump 10. Similarly, the power conversion switch 47 at the rear side controls the pump 10 to operate with a greater power to ensure that the water outlet speed is compatible with the water inlet speed.

[0044] The PLC controller controls the electric slide rail 51 to move the receiving box 52 upward every 3 hours, and opens the electric control valve on the wall of the sampling tube 53 for 5 seconds, so that a part of the wastewater in the outlet pipe 9 is sampled into the receiving box 52. The PLC controller then controls the electric push rod 56 to push the installation shell 57 and the detection plate 59 to move in the receiving box 52 at a fixed speed. The detection plate 59 is subjected to the resistance of the wastewater in the receiving box 52, which causes the detection plate 59 to move relative to the installation shell 57, and then the compensation rod 58 overcomes the elastic force of the compensation spring 511 to drive the compensation block 510 to move in the installation shell 57. When the paint wastewater is flocculated and precipitated by chemical agents, the pollutants in the wastewater are removed. When the concentration is still relatively high, the wastewater as a whole will appear more viscous, which will increase the contact resistance between the detection plate 59 and the wastewater, making the compensation block 510 move back a greater distance in the installation shell 57. At this time, the conductive block 513 at the lower end of the compensation block 510 contacts the electrical connection bar 512, and feeds back an electrical signal to the PLC controller, indicating that the current pollutant content in the wastewater will still affect the ultrafiltration membrane assembly 11. At this time, the PLC controller controls the solenoid valve on the outlet pipe 9 to close, and opens the solenoid valve on the water pipe 12, so that the security filter 13 is put into use at the front end of the ultrafiltration membrane assembly 11, and further fine filtration treatment is performed on the wastewater;

[0045] When the safety filter 13 is put into use, the PLC controller controls the reduction motor 73 to act synchronously, and the reduction motor 73 drives the rotating shaft 72 to drive the arc-shaped pressing block 75 to move slowly in the prompt round shell 71 until the arc-shaped pressing block 75 acts on the prompt switch 74. The prompt switch 74 controls the alarm 76 to sound, reminding the staff that the filter element in the safety filter 13 should be replaced, and the power conversion switch 47 also controls the working power of the reduction motor 73. When the wastewater is passed in at a fast speed, the power conversion switch 47 at the rear side is triggered, which also makes the reduction motor 73 work at a higher power, so that the interval time of the arc-shaped pressing block 75 pressing on the prompt switch 74 is shorter, and the better matching under the condition of high flow rate, the filtering strength of the safety filter 13 is improved, and the pollutants will be accumulated faster, and the filter element needs to be replaced more timely;

[0046] When the wastewater concentration is detected, the relative movement of the compensation block 510 in the mounting shell 57 will drive the push plate 69 to move synchronously. The push plate 69 applies pressure to the toggle plate 66, so that the toggle plate 66 moves accordingly through the sliding connection between the sliding seat 63 and the resistance rod 62, thereby driving the conductive contact 65 to slide synchronously on the resistor rod 64. Specifically, when the wastewater pollution concentration is greater, the resistance encountered by the detection plate 59 is greater, and the backward movement distance of the compensation block 510 is greater, the sliding distance of the conductive contact 65 on the resistor rod 64 is greater, and the access resistance of the resistor rod 64 is smaller. The conductive contact 65 and the resistor rod 64 are connected in series to the power supply circuit of the reduction motor 73, thereby increasing the power supply current of the reduction motor 73, making the speed of the reduction motor 73 faster, and further increasing the frequency of the prompt switch 74 being pressed and triggered, so as to better match the wastewater with high pollution level, which will cause the pollutants attached to the security filter 13 to accumulate faster, and the filter element of the security filter 13 needs to be replaced more timely.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A paint spraying wastewater recycling system, comprising a sedimentation tank (1), wherein a water inlet pipe (8) and a water outlet pipe (9) are symmetrically fixedly connected to the side wall of the sedimentation tank (1), a pump (10) and an ultrafiltration membrane assembly (11) are installed on the water outlet pipe (9), a water pipe (12) located between the pump (10) and the ultrafiltration membrane assembly (11) is also installed on the water outlet pipe (9), a safety filter (13) is installed on the water pipe (12), and a solenoid valve is installed on the pipe wall at the connection between the water outlet pipe (9) and the water pipe (12), characterized in that: Also includes: A water inlet flow rate detection mechanism (2) is mounted on the water inlet pipe (8); A full-scale pesticide application mechanism (3) is fixedly mounted on the sedimentation tank (1); the full-scale pesticide application mechanism (3) and the water inlet flow rate detection mechanism (2) are connected in transmission via a reduction gear box (14); the reduction gear box (14) is fixedly mounted on the outer wall of the sedimentation tank (1); A flow rate feedback control mechanism (4) is fixedly mounted on the outer wall of the sedimentation tank (1) and is used to control the working power of the overall pesticide application mechanism (3); A wastewater concentration detection mechanism (5) is fixedly mounted on the outer wall of the sedimentation tank (1) and the wall of the outlet pipe (9); A concentration feedback control mechanism (6) is fixedly mounted on the wastewater concentration detection mechanism (5); A prompting mechanism (7) is fixedly mounted on the wastewater concentration detection mechanism (5) and is used to prompt the replacement of the filter element in the security filter (13); The water inlet flow rate detection mechanism (2) comprises a detection shell (21) fixedly mounted on the water inlet pipe (8), a transmission shaft (22) rotatably connected inside the detection shell (21), a water wheel (23) fixedly sleeved on the shaft wall of the transmission shaft (22) located inside the detection shell (21), an upper end of the transmission shaft (22) fixedly connected to the input end of the reduction gear box (14), a micro generator (24) fixedly mounted on the lower end of the detection shell (21), and the lower end of the transmission shaft (22) fixedly connected to the input end of the micro generator (24); The full-scale spraying mechanism (3) comprises two side plates (31) symmetrically fixedly connected to the outer wall of the upper end of the sedimentation tank (1); a reciprocating screw (32) is rotatably connected between the two side plates (31); one end of the reciprocating screw (32) is fixedly connected to the output end of the reduction gear box (14); an L-shaped support plate (33) is threadedly sleeved on the rod wall of the reciprocating screw (32); a spray head (34) is fixedly installed at the lower end of the horizontal part of the L-shaped support plate (33); a spray pipe (35) is fixedly connected to the upper end of the spray head (34); a spray pump (36) is installed on the spray pipe (35); the spray pump (36) is fixedly installed outside the L-shaped support plate (33); a guide slide rod (37) is also fixedly installed between the two side plates (31); and a guide slide hole slidably sleeved with the guide slide rod (37) is opened on the side wall of the L-shaped support plate (33); The flow velocity feedback control mechanism (4) comprises a flow velocity feedback shell (41), the inner wall of the flow velocity feedback shell (41) is fixedly connected to a plurality of limit slide bars (42) arranged in parallel, the plurality of limit slide bars (42) are externally slidably sleeved with a same force-bearing plate (43), the side wall of the force-bearing plate (43) is fixedly connected to a push-pushing permanent magnetic plate (44), and the inner wall of the flow velocity feedback shell (41) is fixedly provided with a push-pushing electromagnetic plate (45) arranged corresponding to the position of the push-pushing permanent magnetic plate (44). A plurality of return springs (46) sleeved outside the limit slide bar (42) are fixedly connected to the opposite side of the force-bearing plate (43) and the flow rate feedback shell (41); a plurality of power conversion switches (47) arranged at equal intervals are fixedly installed on one side of the inner wall of the flow rate feedback shell (41); a push-pushing round head (48) arranged corresponding to the position of the power conversion switch (47) is fixedly connected to one end of the force-bearing plate (43); and the micro-generator (24) is electrically connected to the push-pushing electromagnetic plate (45); The wastewater concentration detection mechanism (5) comprises an electric slide rail (51) fixedly mounted on the outer wall of the sedimentation tank (1), the electric slide rail (51) being arranged longitudinally, one end of a slider in the electric slide rail (51) being fixedly connected to a receiving box (52), a sampling tube (53) located on the upper side of the receiving box (52) being fixedly mounted on the wall of the outlet pipe (9), a drainage pipe (54) being fixedly connected to the lower end of the receiving box (52), an electric control valve being mounted on both the sampling tube (53) and the drainage pipe (54), an L-shaped extension plate (55) being fixedly connected to the outer wall of the receiving box (52), an electric push rod (56) being fixedly inserted into the vertical portion of the L-shaped extension plate (55), and an output end of the electric push rod (56) being fixedly connected to a mounting A housing (57), a socket is provided on a side of the mounting housing (57) away from the electric push rod (56), and a compensation rod (58) is movably inserted into the corresponding socket, one end of the compensation rod (58) is fixedly connected to a detection plate (59) extending into the receiving box (52), one end of the compensation rod (58) located in the mounting housing (57) is fixedly connected to a compensation block (510), a compensation spring (511) sleeved on the outside of the compensation rod (58) is fixedly connected between the compensation block (510) and the mounting housing (57), an electric connection strip (512) arranged at the rear side is fixedly connected to the bottom of the inner wall of the mounting housing (57), and a conductive block (513) corresponding to the position of the electric connection strip (512) is fixedly connected to the lower end of the compensation block (510); The concentration feedback control mechanism (6) comprises an insulating shell (61) fixedly mounted on the upper end of the mounting shell (57), a plurality of resistance rods (62) arranged side by side are fixedly connected inside the insulating shell (61), a plurality of resistance rods (62) are slidably sleeved on the outside of the plurality of resistance rods (62) with a same sliding seat (63), a resistance rod (64) is fixedly mounted on the upper side of the inner wall of the insulating shell (61), a conductive contact piece (65) in electrical contact with the resistance rod (64) is fixedly connected to the upper end of the sliding seat (63), and the sliding seat (63) is The lower end is fixedly connected to a toggle plate (66), the side wall of the toggle plate (66) is fixedly connected to a return permanent magnet plate (67), the inner wall of the insulating shell (61) is fixedly provided with a return electromagnetic plate (68) arranged in a position opposite to the return permanent magnet plate (67), the upper end of the compensation block (510) is fixedly connected to a push plate (69), the upper end of the mounting shell (57) is provided with a strip-shaped opening for the upper end of the push plate (69) to extend through, and the push plate (69) is arranged on one side of the toggle plate (66).

2. A paint spraying wastewater recycling system according to claim 1, characterized in that: The prompt mechanism (7) comprises a prompt circular shell (71) fixedly mounted on the lower side of the L-shaped extension plate (55); a rotating shaft (72) is rotatably connected to the center of the inner wall of the prompt circular shell (71); a reduction motor (73) for driving the rotating shaft (72) to rotate is fixedly mounted on the lower end of the prompt circular shell (71); a prompt switch (74) is fixedly mounted on one side of the inner wall of the prompt circular shell (71); an arc-shaped pressing block (75) is fixedly connected to the shaft wall of the rotating shaft (72); and a warning device (76) is fixedly mounted on the outer wall of the prompt circular shell (71).

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