An integrated treatment equipment for paint spraying wastewater

Abstract

The present invention belongs to the technical field of wastewater treatment, and in particular, relates to an integrated treatment device for paint spraying wastewater, including a chemical sedimentation tank and a mounting plate arranged on the top of the chemical sedimentation tank, and also includes: an annular seat, the annular seat is fixedly mounted on the top of the mounting plate, and the end surface of the annular seat is provided with a plurality of flotation zones; a water inlet unit is mounted on the top of the annular seat, and the water outlet of the water inlet unit is connected with each flotation zone; the flotation unit is mounted on the top of the mounting plate, and the flotation unit has a plurality of water outlets, and is respectively connected with the corresponding flotation zones; an upper sewage discharge unit is mounted on the outer side wall of the annular seat. The present invention can effectively shorten the treatment time of paint spraying wastewater by synchronously performing flotation treatment of oily pollutants during the water inlet process, and automatically adjusting the chemical flocculant based on the particle concentration in the wastewater, and at the same time, can reduce the possibility of volatile substances in the paint spraying wastewater escaping.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to an integrated treatment device for paint spraying wastewater. Background Art

[0002] Spray painting is widely used in industries such as automobile manufacturing and furniture production. The painting process will produce a large amount of wastewater, which contains a variety of complex components such as pigments, resins, solvents, etc. If these wastewaters are discharged directly without treatment, they will seriously pollute the environment, so the paint wastewater needs to be treated.

[0003] At present, due to the complex internal components of paint wastewater, it is usually necessary to perform multi-stage treatment on the paint wastewater, which usually includes grid filtration, oil separation treatment, chemical precipitation, biological treatment, etc. For example, a chemical precipitation tank for paint wastewater treatment disclosed in patent publication number CN105060563B;

[0004] When spray paint wastewater is subjected to oil separation treatment (removing oily impurities in spray paint wastewater) and chemical precipitation (removing suspended impurities by settling them with chemical agents), it is usually carried out in two separate treatment pools. Since oil separation treatment and chemical precipitation need to wait for oily impurities to float and suspended impurities to settle, both oil separation treatment and sedimentation treatment require a long waiting time (usually 8 to 24 hours), resulting in a longer treatment time for spray paint wastewater. In addition, since there is more water in the oil separation treatment pool, it is blocked by suspended impurities and oily impurities are not easy to float up, which affects the treatment effect of oily impurities and the use effect is poor. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated treatment device for paint spraying wastewater in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: an integrated treatment device for paint spraying wastewater, comprising a chemical precipitation tank and a mounting plate arranged on the top of the chemical precipitation tank, and also comprising:

[0007] An annular seat is fixedly mounted on the top of the mounting plate, and a plurality of air flotation areas are formed on the end surface of the annular seat;

[0008] A water inlet unit is installed on the top of the annular seat, and a water outlet of the water inlet unit is connected to each air flotation area;

[0009] An air flotation unit is installed on the top of the installation plate, and the air flotation unit has a plurality of water outlets, which are respectively connected to the corresponding air flotation areas;

[0010] An upper sewage discharge unit is installed on the outer side wall of the annular seat and is connected to the inner upper side of each air flotation zone;

[0011] A lower sewage discharge unit is installed at the bottom of the mounting plate and is connected to the bottom of each flotation zone;

[0012] A drainage detection unit is arranged inside the chemical sedimentation tank and is connected to the water outlet of the lower sewage discharge unit;

[0013] A dosing unit is arranged on the top of the annular seat, and a water outlet end of the dosing unit is connected to the drainage detection unit;

[0014] The controller is arranged above the chemical precipitation tank, and the water inlet unit, the air flotation unit, the upper sewage discharge unit, the lower sewage discharge unit, the drainage detection unit and the dosing unit are all electrically connected to the controller.

[0015] Preferably, the water inlet unit includes a top plate fixedly mounted on the top of the annular seat, a plurality of water inlet holes are provided on the end surface of the top plate, and each of the water inlet holes is communicated with the corresponding flotation area, a water inlet solenoid valve electrically connected to the controller is installed inside each of the water inlet holes, a water inlet cover is fixedly mounted on the top of the top plate, and the water inlet cover is annular, each of the water inlet holes is communicated with the water inlet cover, and a wastewater inlet pipe is fixedly connected to the top of the water inlet cover.

[0016] Preferably, the flotation unit includes an air box fixedly mounted on the top of the mounting plate, an air pump is mounted on the upper end of the air box, an air supply pipe is fixedly mounted on the air outlet end of the air pump, and the air supply pipe is connected to the air box, a plurality of flotation tubes are fixedly plugged into the side wall of the air box, a hollow plate is provided inside each of the flotation areas, and a plurality of air jet holes are opened at the lower end of each of the hollow plates, each of the hollow plates is fixedly connected to the corresponding flotation tube, and the air pump is electrically connected to the controller.

[0017] Preferably, the upper sewage discharge unit includes an annular square tube fixedly mounted on the upper end of the outer side wall of the annular seat, and a plurality of overflow pipes are fixedly connected to the side wall of the annular square tube, and one end of each group of overflow pipes away from the annular square tube extends to the interior of the flotation zone on the same side, and a plurality of overflow holes are opened on the upper side of the tube wall of each overflow pipe, and an overflow solenoid valve electrically connected to the controller is installed inside each overflow pipe, and the outer side wall of the annular square tube is fixedly connected to a sewage discharge pipe.

[0018] Preferably, the lower sewage discharge unit includes an annular cover arranged inside the chemical sedimentation tank, and the annular cover is installed at the bottom of the mounting plate, and the bottom of each of the flotation zones is provided with a water outlet hole connected to the annular cover, and a water outlet solenoid valve electrically connected to the controller is installed inside each water outlet hole, and a plurality of discharge pipes are fixedly connected to the side wall of the annular cover.

[0019] Preferably, the drainage detection unit includes a hollow block arranged inside the chemical precipitation tank, and each discharge pipe is connected to the hollow block, a detection square tube is fixedly inserted at the bottom of the hollow block, an insulating baffle is hinged inside the detection square tube, and a torsion spring is provided at the hinge position between the insulating baffle and the detection square tube, the insulating baffle is connected to the detection square tube through the torsion spring, a conductive rod is fixedly installed on the end of the insulating baffle, an arc-shaped insulating block corresponding to the position of the conductive rod is fixedly installed on the inner wall of the detection square tube, and an arc-shaped resistor block is fixedly installed on the arc-shaped surface of the arc-shaped insulating block, and one end of the conductive rod is in sliding contact with the arc-shaped resistor block.

[0020] Preferably, the dosing unit includes a medicine box fixedly mounted on the top of the top plate, a dosing pump fixedly mounted on the lower end of the outer wall of the medicine box, the suction end of the dosing pump is connected to the interior of the medicine box, and a dosing solenoid valve is installed inside the suction end of the dosing pump, the infusion end of the dosing pump is fixedly connected to an infusion tube, and the liquid outlet end of the infusion tube extends to the interior of the detection square tube, and the liquid outlet end of the infusion tube is arranged below the insulating baffle, the dosing pump is electrically connected to the arc-shaped resistor block and the conductive rod through a controller, the dosing solenoid valve is electrically connected to the controller, the controller is mounted on the outer wall of the medicine box, and a static mixer is installed at the liquid outlet end of the detection square tube.

[0021] Preferably, a reflux hole is provided at the upper end of the side wall of each of the air flotation areas close to the air pump, a support net is installed inside the annular seat at a position above the air pump, and adsorption filler is filled above the support net.

[0022] Preferably, a gas flow meter is installed on the pipe wall of the gas pipe, and the detection end of the gas flow meter is arranged inside the gas pipe, the air pump is electrically connected to the arc-shaped resistor block and the conductive rod through a controller, and the controller is electrically connected to the gas flow meter.

[0023] Compared with the existing technology, the advantages of an integrated paint wastewater treatment equipment are:

[0024] 1. Through the coordination of the chemical sedimentation tank, mounting plate, annular seat, multiple flotation areas, water inlet unit, flotation unit, upper sewage discharge unit and lower sewage discharge unit, the wastewater is divided into multiple separate small treatment units during the water inlet process of the paint wastewater, thereby reducing the resistance of the oily dirt to float up, and cooperating with the flotation treatment, the oily dirt in the wastewater can float up quickly, thereby improving the treatment effect of the oily dirt.

[0025] 2. Through the cooperation of the drainage detection unit and the dosing unit, the amount of chemical flocculant added can be automatically adjusted based on the particle concentration in the wastewater after the oily dirt is removed, and the chemical flocculant and wastewater can be fully mixed by coordinating the diversion water inlet, which can not only improve the effect of wastewater sedimentation, but also reduce the waste of flocculants.

[0026] 3. Through the coordination of the reflux holes, support nets and adsorption fillers, the air flow used for flotation of wastewater can be recycled, and in the process of recycling, the volatile waste gas can be removed to reduce the possibility of volatile substances escaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an integrated paint spraying wastewater treatment device provided by the present invention;

[0028] Figure 2 It is a schematic diagram of the internal structure of a chemical sedimentation tank of an integrated paint spray wastewater treatment device provided by the present invention;

[0029] Figure 3 It is a schematic diagram of the partial internal structure of an annular seat of an integrated paint spray wastewater treatment device provided by the present invention;

[0030] Figure 4 The present invention provides an integrated treatment device for paint spraying wastewater. Figure 2 A magnified view of the structure of part A;

[0031] Figure 5 The present invention provides an integrated treatment device for paint spraying wastewater. Figure 3 A magnified view of the structure of part B;

[0032] Figure 6 The present invention provides an integrated treatment device for paint spraying wastewater. Figure 2 The structure of the C part is enlarged;

[0033] Figure 7 It is a schematic diagram of the internal structure of a drug adding box of an integrated paint spray wastewater treatment device provided by the present invention;

[0034] Figure 8 The present invention provides a schematic diagram of the top view of the structure of multiple flotation zones of an integrated paint spraying wastewater treatment device.

[0035] In the figure: 1 chemical sedimentation tank, 2 mounting plate, 3 annular seat, 4 flotation area, 5 water inlet unit, 51 top plate, 52 water inlet hole, 53 water inlet solenoid valve, 54 water inlet cover, 55 wastewater inlet pipe, 6 flotation unit, 61 air box, 62 air pump, 63 air pipe, 64 flotation pipe, 65 hollow plate, 66 jet hole, 7 upper sewage unit, 71 annular square pipe, 72 overflow pipe, 73 overflow hole, 74 overflow solenoid valve, 75 sewage pipe, 8 lower sewage unit, 81 annular cover, 82 water outlet, 83 water outlet solenoid valve, 84 discharge pipe, 9 drainage detection unit, 91 hollow block, 92 detection square tube, 93 insulating baffle, 94 torsion spring, 95 conductive rod, 96 arc-shaped insulating block, 97 arc-shaped resistance block, 10 dosing unit, 101 medicine box, 102 dosing pump, 103 dosing solenoid valve, 104 infusion tube, 105 static mixer, 11 controller, 12 reflux hole, 13 support net, 14 adsorption filler, 15 gas flow meter. DETAILED DESCRIPTION

[0036] 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.

[0037] like Figure 1-Figure 8 As shown, an integrated treatment device for paint spraying wastewater includes a chemical sedimentation tank 1 and a mounting plate 2 arranged on the top of the chemical sedimentation tank 1, and also includes: an annular seat 3, the annular seat 3 is fixedly mounted on the top of the mounting plate 2, and the end surface of the annular seat 3 is provided with a plurality of flotation areas 4, a water inlet unit 5 is mounted on the top of the annular seat 3, and the water outlet end of the water inlet unit 5 is connected to each flotation area 4, the water inlet unit 5 includes a top plate 51 fixedly mounted on the top of the annular seat 3, and the end surface of the top plate 51 is provided with a plurality of water inlet holes 52, and each water inlet hole 52 are all connected with the corresponding flotation area 4, and each water inlet hole 52 is installed with a water inlet solenoid valve 53 electrically connected to the controller 11. A water inlet cover 54 is fixedly installed on the top of the top plate 51, and the water inlet cover 54 is annular. Each water inlet hole 52 is connected with the water inlet cover 54, and a wastewater inlet pipe 55 is fixedly plugged on the top of the water inlet cover 54. The wastewater inlet pipe 55 is connected with the water outlet end of the external grille filter tank. The grille filter tank performs preliminary filtration on the wastewater through the filter grille, and can filter out waste such as large solid particles.

[0038] The flotation unit 6 is installed on the top of the mounting plate 2, and the flotation unit 6 has multiple water outlets, which are respectively connected to the corresponding flotation areas 4. The flotation unit 6 includes an air box 61 fixedly installed on the top of the mounting plate 2, an air pump 62 is installed on the upper end of the air box 61, and an air supply pipe 63 is fixedly installed on the air outlet end of the air pump 62, and the air supply pipe 63 is connected to the air box 61. A plurality of flotation tubes 64 are fixedly plugged into the side wall of the air box 61. A hollow plate 65 is provided inside each flotation area 4, and a plurality of jet holes 66 are opened at the lower end of each hollow plate 65. Each hollow plate 65 is fixedly connected to the corresponding flotation tube 64. The air pump 62 is electrically connected to the controller 11. The flotation tube 64 adopts a corrosion-resistant steel pipe, which can stably support the hollow plate 65.

[0039] A reflux hole 12 is provided at the upper end of the side wall of each flotation area 4 close to the air pump 62. A support net 13 is installed at a position above the air pump 62 inside the annular seat 3, and an adsorption filler 14 is filled above the support net 13. The adsorption filler 14 is a porous filter filler, such as activated carbon. An opening is provided on the end face of the top plate 51, and a sealing cover plate is installed at the opening for replacing the adsorption filler 14. An air pressure valve is provided on the sealing cover. When the air inside the annular seat 3 is insufficient, the external air will push open the valve plate of the air pressure valve under the action of the pressure difference, thereby replenishing air to the inside of the annular seat 3 and ensuring the normal operation of the air pump 62.

[0040] The upper sewage discharge unit 7 is installed on the outer wall of the annular seat 3 and is connected to the inner upper side of each flotation zone 4. The upper sewage discharge unit 7 includes an annular square tube 71 fixedly mounted on the upper end of the outer wall of the annular seat 3, and the side wall of the annular square tube 71 is fixedly plugged with multiple groups of overflow pipes 72. The end of each group of overflow pipes 72 away from the annular square tube 71 extends to the interior of the flotation zone 4 on the same side. Multiple overflow holes 73 are opened on the upper side of the tube wall of each overflow pipe 72. An overflow solenoid valve 74 electrically connected to the controller 11 is installed inside each overflow pipe 72. The outer wall of the annular square tube 71 is fixedly connected with a sewage discharge pipe 75. The sewage discharge pipe 75 is connected to an external pipeline specifically used to receive oily dirt. The oily dirt can be reprocessed (such as distillation) or treated by a special treatment method.

[0041] The lower sewage discharge unit 8 is installed at the bottom of the mounting plate 2 and is connected to the bottom of each flotation area 4. The lower sewage discharge unit 8 includes an annular cover 81 arranged inside the chemical precipitation tank 1, and the annular cover 81 is installed at the bottom of the mounting plate 2. A water outlet hole 82 connected to the annular cover 81 is opened at the bottom of each flotation area 4, and a water outlet solenoid valve 83 electrically connected to the controller 11 is installed inside each water outlet hole 82. A plurality of discharge pipes 84 are fixedly connected to the side wall of the annular cover 81. When the water outlet solenoid valve 83 is energized, the valve plate is opened, and when the power is off, the valve plate is closed.

[0042] The drainage detection unit 9 is arranged inside the chemical precipitation tank 1 and is connected to the water outlet of the lower sewage discharge unit 8. The drainage detection unit 9 includes a hollow block 91 arranged inside the chemical precipitation tank 1, and each discharge pipe 84 is connected to the hollow block 91. A detection square tube 92 is fixedly inserted at the bottom of the hollow block 91, and an insulating baffle 93 is hinged inside the detection square tube 92. A torsion spring 94 is provided at the hinge position between the insulating baffle 93 and the detection square tube 92. The insulating baffle 93 is connected to the detection square tube 92 through the torsion spring 94. A conductive rod 95 is fixedly installed at the end of the insulating baffle 93. An arc-shaped insulating block 96 corresponding to the position of the conductive rod 95 is fixedly installed on the inner wall of the detection square tube 92, and an arc-shaped resistor block 97 is fixedly installed on the arc surface of the arc-shaped insulating block 96. One end of the conductive rod 95 is in sliding contact with the arc-shaped resistor block 97. A flexible sealing sleeve is provided between the arc-shaped insulating block 96 and the insulating baffle 93 to prevent wastewater from contacting the conductive rod 95 and the arc-shaped resistor block 97.

[0043] The dosing unit 10 is arranged on the top of the annular seat 3, and the water outlet end of the dosing unit 10 is connected to the drainage detection unit 9. The dosing unit 10 includes a medicine box 101 fixedly installed on the top of the top plate 51, and a dosing pump 102 is fixedly installed at the lower end of the outer wall of the medicine box 101. The suction end of the dosing pump 102 is connected to the inside of the medicine box 101, and a dosing solenoid valve 103 is installed inside the suction end of the dosing pump 102. The infusion end of the dosing pump 102 is fixedly connected to an infusion tube 104, and the outlet end of the infusion tube 104 extends to the inside of the detection square tube 92, and the outlet end of the infusion tube 104 is arranged below the insulating baffle 93. The dosing pump 102 is controlled by a controller 11 is electrically connected to the arc-shaped resistor block 97 and the conductive rod 95, the dosing solenoid valve 103 is electrically connected to the controller 11, the controller 11 is installed on the outer wall of the medicine box 101, and a static mixer 105 is installed at the liquid outlet end of the detection square tube 92. The static mixer 105 includes components such as pipes and baffles. The baffles allow the fluid inside the pipe to cross-flow, thereby facilitating full mixing of the fluid. A dosing pipeline and a liquid level sensor for detecting the remaining amount of flocculant are installed on the side wall of the medicine box 101. The remaining flocculant is detected by the liquid level sensor. When the flocculant liquid level reaches a preset value, flocculant is added to the inside of the medicine box 101 through an external dosing pipeline.

[0044] The controller 11 is arranged above the chemical sedimentation tank 1, and the water inlet unit 5, the flotation unit 6, the upper sewage unit 7, the lower sewage unit 8, the drainage detection unit 9 and the dosing unit 10 are all electrically connected to the controller 11. A gas flow meter 15 is installed on the pipe wall of the gas pipe 63, and the detection end of the gas flow meter 15 is arranged inside the gas pipe 63. The air pump 62 is electrically connected to the arc resistor block 97 and the conductive rod 95 through the controller 11. The controller 11 is electrically connected to the gas flow meter 15. The gas flow detected by the gas flow meter 15 can facilitate personnel to calculate the amount of suspended matter and solid particulate matter in the wastewater.

[0045] The operating principle of the present invention is now described as follows: when treating wastewater, the controller 11 is started, and the wastewater that has been preliminarily filtered from the outside (for example, wastewater that has passed through the filter grid) enters the water inlet cover 54 through the wastewater inlet pipe 55. After the controller 11 is started, the water inlet solenoid valve 53 inside the leftmost water inlet hole 52 will be started first, and the water inlet solenoid valve 53 will be timed to work for 1 minute. At this time, the wastewater inside the water inlet cover 54 will enter the air flotation area 4 on this side through the water inlet hole 52 on this side. Subsequently, the controller 11 controls each water inlet solenoid valve 53 to work in turn in a clockwise direction, and the working time of each water inlet solenoid valve 53 is 1 minute, so that each air flotation area 4 can be filled with wastewater in turn;

[0046] After the controller 11 is started, it controls the air pump 62 to work. The air pump 62 will inhale the external air and deliver it to the inside of the air box 61 through the air delivery pipe 63. Then the airflow passes through each air flotation pipe 64 and enters each air flotation area 4. After the airflow contacts the wastewater, it will generate bubbles in the wastewater. When the bubbles float up, they will help the oily dirt to float up (because the density of the oily dirt is less than that of water and the compatibility with water is poor), so that the oily dirt can gather and float on the surface of the water. One minute after the water inlet solenoid valve 53 at the air flotation area 4 on this side ends the timing work, The controller 11 controls the overflow solenoid valve 74 inside the overflow pipe 72 on this side to work for 10 seconds. At this time, the oily dirt floating on the surface of the water will overflow into the annular square tube 71 through the overflow hole 73 and the overflow pipe 72, and finally be discharged through the sewage pipe 75. After the overflow solenoid valve 74 works at the end of the timed operation, the controller 11 controls the water outlet solenoid valve 83 on this side to work for 30 seconds. At this time, the wastewater inside the flotation area 4 will enter the annular cover 81 through the water outlet hole 82, and finally flow into the detection square tube 92 through the discharge pipe 84 and the hollow block 91.

[0047] 2 minutes and 40 seconds after the controller 11 is started, the controller 11 will control the connection circuit of the conductive rod 95, the arc-shaped resistor block 97 and the dosing pump 102 to be connected, and at the same time, the dosing solenoid valve 103 is energized to open. When the wastewater flows through the detection square tube 92, under the action of the downstream gravity of the wastewater, the wastewater will push the insulating baffle 93 downward to rotate a certain angle. If there are fewer suspended particles and solid particles in the wastewater, the fluidity of the wastewater is better and the flow resistance is smaller. Therefore, the angle of the insulating baffle 93 rotating downward is smaller. If there are more suspended particles and solid particles in the wastewater, the fluidity of the wastewater is poor. Under the action of the downstream pressure, the wastewater will push the insulating baffle 93 to rotate at a larger angle. Therefore, when there are fewer suspended particles and solid particles in the wastewater, the contact position of the conductive rod 95 and the arc-shaped resistor block 97 is close to the initial end of the arc-shaped resistor block 97. At this time, the length of the arc-shaped resistor block 97 connected to the connection circuit of the conductive rod 95 and the dosing pump 102 is longer, so the arc-shaped resistor block 97 , the resistance of the connection circuit between the conductive rod 95 and the dosing pump 102 is relatively large, so the current passing into the dosing pump 102 is relatively small, which will cause the output power of the dosing pump 102 to be low. At this time, the dosing pump 102 delivers less flocculant. On the contrary, when there are more suspended particles and solid particles in the wastewater, the output power of the dosing pump 102 becomes higher, and the output amount of the flocculant increases. Therefore, under the condition of meeting the flocculant dosage required for the flocculation and precipitation of the wastewater, the waste of flocculant can be reduced. After the flocculant delivered by the dosing pump 102 enters the detection square tube 92 through the infusion tube 104, it will contact with the wastewater, and under the action of the static mixer 105, the flocculant and the wastewater are fully mixed, so as to ensure the flocculation and precipitation effect. After all the wastewater enters the sedimentation tank, wait for an appropriate time to allow the suspended particles and solid particles in the wastewater to precipitate, and then the wastewater in the chemical sedimentation tank 1 is led out to the next treatment tank (such as a biological treatment tank) for subsequent treatment.

[0048] When the air pump 62 is working, the airflow delivered to each flotation zone 4 will flow back to the position of the air pump 62 through the reflux hole 12, and the airflow needs to pass through the adsorption filler 14. Since there are volatile substances in the paint, the volatile substances in the circulating airflow are adsorbed and purified by the adsorption filler 14, which can avoid the phenomenon that the airflow generated during flotation carries volatile substances to escape and pollute the air environment to a certain extent;

[0049] At the same time, after the controller 11 is started, the air pump 62 will be synchronously connected to the connection circuit of the conductive rod 95 and the arc-shaped resistor block 97. When the suspended particles and solid particles in the wastewater are relatively small, at this time, the length of the arc-shaped resistor block 97 connected to the connection circuit of the conductive rod 95 and the air pump 62 is relatively long, so the output power of the air pump 62 becomes lower, and therefore the gas flow through the gas flow meter 15 becomes less, and vice versa, the gas flow through the gas flow meter 15 becomes more. After all the wastewater has entered, the personnel can estimate the amount of suspended particles and solid particles in the wastewater in the chemical precipitation tank 1 through the flow of the gas flow meter 15, so as to facilitate the control of the time of chemical precipitation (for example, when there are fewer suspended particles and solid particles, the waiting time of chemical precipitation can be appropriately reduced, and vice versa, the time of chemical precipitation can be appropriately extended), ensuring that the wastewater is fully precipitated and time waste can be reduced.

[0050] 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. An integrated treatment device for paint spraying wastewater, comprising a chemical sedimentation tank (1) and a mounting plate (2) arranged on the top of the chemical sedimentation tank (1), characterized in that: Also includes: An annular seat (3) is fixedly mounted on the top of the mounting plate (2), and a plurality of air flotation areas (4) are formed on the end surface of the annular seat (3); A water inlet unit (5) is installed on the top of the annular seat (3), and a water outlet end of the water inlet unit (5) is connected to each air flotation area (4); An air flotation unit (6) is installed on the top of the installation plate (2), and the air flotation unit (6) has a plurality of water outlets, each of which is connected to a corresponding air flotation area (4); An upper sewage discharge unit (7) is mounted on the outer side wall of the annular seat (3) and is connected to the inner upper side of each air flotation zone (4); A lower sewage discharge unit (8) is installed at the bottom of the mounting plate (2) and is connected to the bottom of each air flotation area (4); A drainage detection unit (9) is arranged inside the chemical sedimentation tank (1) and is connected to the water outlet of the lower sewage discharge unit (8); A dosing unit (10) is arranged on the top of the annular seat (3), and a water outlet end of the dosing unit (10) is connected to the drainage detection unit (9); A controller (11) is arranged above the chemical sedimentation tank (1); the water inlet unit (5), the air flotation unit (6), the upper sewage discharge unit (7), the lower sewage discharge unit (8), the drainage detection unit (9) and the dosing unit (10) are all electrically connected to the controller (11); The drainage detection unit (9) comprises a hollow block (91) arranged inside the chemical sedimentation tank (1); a detection square tube (92) is fixedly inserted at the bottom of the hollow block (91); an insulating baffle (93) is hinged inside the detection square tube (92); a torsion spring (94) is provided at a hinged position between the insulating baffle (93) and the detection square tube (92); the insulating baffle (93) is connected to the detection square tube (92) via the torsion spring (94); a conductive rod (95) is fixedly mounted on the end of the insulating baffle (93); an arc-shaped insulating block (96) corresponding to the position of the conductive rod (95) is fixedly mounted on the inner wall of the detection square tube (92); an arc-shaped resistor block (97) is fixedly mounted on the arc surface of the arc-shaped insulating block (96); and one end of the conductive rod (95) is in sliding contact with the arc-shaped resistor block (97).

2. The integrated paint spraying wastewater treatment equipment according to claim 1 is characterized in that: The water inlet unit (5) comprises a top plate (51) fixedly mounted on the top of the annular seat (3); a plurality of water inlet holes (52) are provided on the end surface of the top plate (51); each water inlet hole (52) is connected to a corresponding air flotation zone (4); each water inlet hole (52) is internally mounted with a water inlet solenoid valve (53) electrically connected to a controller (11); a water inlet cover (54) is fixedly mounted on the top of the top plate (51); the water inlet cover (54) is annular; each water inlet hole (52) is connected to the water inlet cover (54); and a wastewater inlet pipe (55) is fixedly plugged into the top of the water inlet cover (54).

3. The integrated paint spraying wastewater treatment equipment according to claim 1 is characterized in that: The air flotation unit (6) comprises an air box (61) fixedly mounted on the top of the mounting plate (2); an air pump (62) is mounted on the upper end of the air box (61); an air delivery pipe (63) is fixedly mounted on the air outlet end of the air pump (62); and the air delivery pipe (63) is connected to the air box (61); a plurality of air flotation pipes (64) are fixedly plugged into the side wall of the air box (61); a hollow plate (65) is provided inside each of the air flotation areas (4); and a plurality of air jet holes (66) are opened at the lower end of each of the hollow plates (65); each of the hollow plates (65) is fixedly connected to a corresponding air flotation pipe (64); and the air pump (62) is electrically connected to a controller (11).

4. The integrated paint spraying wastewater treatment equipment according to claim 1 is characterized in that: The upper sewage discharge unit (7) comprises an annular square tube (71) fixedly sleeved on the upper end of the outer wall of the annular seat (3), and a plurality of overflow pipes (72) are fixedly plugged into the side wall of the annular square tube (71), and one end of each group of overflow pipes (72) away from the annular square tube (71) extends to the inside of the flotation zone (4) on the same side, and a plurality of overflow holes (73) are opened on the upper side of the tube wall of each overflow pipe (72), and an overflow solenoid valve (74) electrically connected to the controller (11) is installed inside each overflow pipe (72), and the outer wall of the annular square tube (71) is fixedly connected to a sewage discharge pipe (75).

5. The integrated paint spraying wastewater treatment equipment according to claim 1 is characterized in that: The lower sewage discharge unit (8) comprises an annular cover (81) arranged inside the chemical sedimentation tank (1), and the annular cover (81) is installed on the bottom of the mounting plate (2), and each of the flotation areas (4) is provided with a water outlet hole (82) connected to the annular cover (81), and each of the water outlet holes (82) is installed inside a water outlet solenoid valve (83) electrically connected to the controller (11), and a plurality of discharge pipes (84) are fixedly plugged into the side wall of the annular cover (81), and each of the discharge pipes (84) is connected to the hollow block (91).

6. The integrated paint spraying wastewater treatment equipment according to claim 2 is characterized in that: The dosing unit (10) comprises a medicine box (101) fixedly mounted on the top of a top plate (51); a dosing pump (102) is fixedly mounted on the lower end of an outer wall of the medicine box (101); a suction end of the dosing pump (102) is connected to the interior of the medicine box (101); a dosing solenoid valve (103) is mounted inside the suction end of the dosing pump (102); an infusion end of the dosing pump (102) is fixedly connected to an infusion tube (104); and an outlet end of the infusion tube (104) is connected to the infusion tube (104). The liquid outlet of the infusion tube (104) is arranged below the insulating baffle (93), the drug-adding pump (102) is electrically connected to the arc-shaped resistor block (97) and the conductive rod (95) through the controller (11), the drug-adding solenoid valve (103) is electrically connected to the controller (11), and the controller (11) is installed on the outer wall of the medicine box (101). The liquid outlet of the detection square tube (92) is provided with a static mixer (105).

7. The integrated paint spraying wastewater treatment equipment according to claim 3 is characterized in that: A reflux hole (12) is provided at the upper end of the side wall of each of the air flotation areas (4) close to the air pump (62), a support net (13) is installed inside the annular seat (3) at a position above the air pump (62), and an adsorption filler (14) is filled above the support net (13).

8. The integrated paint spraying wastewater treatment equipment according to claim 3 is characterized in that: A gas flow meter (15) is installed on the wall of the gas delivery pipe (63), and a detection end of the gas flow meter (15) is arranged inside the gas delivery pipe (63). The gas pump (62) is electrically connected to the arc-shaped resistance block (97) and the conductive rod (95) via a controller (11), and the controller (11) is electrically connected to the gas flow meter (15).

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