Painting wastewater zero discharge system

Abstract

The present application relates to a zero-discharge system for coating wastewater, and to the technical field of wastewater discharge systems. The zero-discharge system for coating wastewater includes a purification device for purifying wastewater, and the zero-discharge system for coating wastewater also includes a flow disturbance device and a bubble spraying device. The flow disturbance device includes a flow storage mechanism, a flow driving mechanism, and a multi-component breaking mechanism. The flow storage mechanism is connected to the purification device; all the breaking mechanisms are arranged on the flow storage mechanism through the flow driving mechanism to disturb the wastewater located in the inner cavity of the flow storage mechanism; the bubble spraying device includes an air jet mechanism, a reversing mechanism, and a driving mechanism. The air jet mechanism is arranged on the flow storage mechanism, and the reversing mechanism is rotated and arranged on the air jet mechanism by the driving mechanism, so that the air jet mechanism performs bubble spraying treatment on the wastewater in the inner cavity of the flow storage mechanism. The present application has the effect of reducing the phenomenon of oil and fat components and particulate impurities combining with each other, and ensuring the convenience and work efficiency of the purification device in removing oil and fat components from wastewater.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater discharge systems, and in particular to a zero-discharge system for painting wastewater. Background Art

[0002] During the production and processing of metal parts, they are often painted to form a film that helps isolate moisture and reduce oxidation and corrosion. This painting process often produces wastewater containing various oils, grease, acidic and alkaline particles, and small metallic impurities, necessitating purification through wastewater disposal systems.

[0003] Existing wastewater discharge systems often include a degreasing system, a neutralization system, and a filtration system. The filtration system and degreasing system are located on opposite sides of the neutralization system. The degreasing system removes grease from the wastewater, the neutralization system adjusts the pH of the wastewater, and the filtration system filters out metallic and non-metallic impurities, ultimately ensuring that the wastewater is low in grease, neutral, and low in impurities, meeting initial discharge standards.

[0004] However, the oil components and small-diameter particulate impurities in the wastewater are very easy to combine with each other, which greatly increases the difficulty of removing oil from the wastewater, so there is room for improvement. Summary of the Invention

[0005] In order to improve the problem that the grease components and small-diameter granular impurities in the wastewater are easily combined with each other, the present application provides a zero-discharge system for coating wastewater.

[0006] The zero-discharge system for coating wastewater provided in this application adopts the following technical solutions:

[0007] A zero-discharge system for coating wastewater includes a purification device for purifying wastewater. The zero-discharge system for coating wastewater also includes a flow disturbance device and a bubble spraying device. The flow disturbance device includes a flow storage mechanism, a flow driving mechanism and a multi-component breaking mechanism. The flow storage mechanism is connected to the purification device for accumulating wastewater to be purified; all the breaking mechanisms are arranged on the flow storage mechanism through the flow driving mechanism to disturb the wastewater located in the inner cavity of the flow storage mechanism; the bubble spraying device includes an injection mechanism, a reversing mechanism and a driving mechanism. The injection mechanism is passed through the flow storage mechanism, and the reversing mechanism is rotatably arranged on the injection mechanism through the driving mechanism, so that the injection mechanism performs bubble spraying treatment on the wastewater in the inner cavity of the flow storage mechanism.

[0008] By adopting the above technical solution, the flow storage mechanism is used to store the wastewater to be purified, and the flow driving mechanism controls all the dividing mechanisms to disturb the water flow at the same time, so as to reduce the phenomenon that the oil components and particulate impurities in the wastewater are combined with each other in a low flow rate state or a suspended static state and are not easily purified by the purification device; the jet mechanism intermittently sprays bubbles into the wastewater through the driving mechanism and the reversing mechanism to reduce the phenomenon that the oil components are aggregated inside the wastewater or on the liquid surface, and then by reducing the area of the oil components, the contact and combination of the oil components with the particulate impurities are reduced, thereby ensuring the convenience and work efficiency of the purification device in removing the oil components from the wastewater.

[0009] In a specific feasible implementation scheme, the flow storage mechanism includes a flow storage box and a side frame arranged on the flow storage box, the flow driving mechanism includes a flow driving motor and an extension shaft, the flow driving motor is arranged on the side frame, the output end of the flow driving motor is passed through the side frame and connected to the extension shaft; all the disconnecting mechanisms are arranged at intervals on the extension shaft.

[0010] By adopting the above technical solution, the flow-driving motor is installed on the flow storage box through the side frame. The output end is driven to rotate by the flow-driving motor, so that all the dividing mechanisms rotate at a uniform speed in the wastewater, thereby destroying the static state of the wastewater and reducing the phenomenon of oil and fat components and particulate impurities combining with each other.

[0011] In a specific feasible implementation scheme, each of the separating mechanisms includes a central plate and spoiler components arranged on opposite sides of the central plate, the central plate is arranged on an extension shaft, and each group of spoiler components includes a push plate and multiple groups of movable parts; the push plate is connected to the central plate through all movable parts.

[0012] By adopting the above technical solution, the central plate fully contacts the wastewater through its own surface area to disturb the wastewater and reduce the combination of oil components and particulate impurities in the wastewater; the push flow plate is installed on the central plate through movable parts. As the central plate moves in the wastewater, the push flow plate moves after bearing the resistance of displacement in the wastewater, and the movable parts are compressed and deformed in the wastewater through their own compression deformation, thereby causing the push flow plate to displace relative to the central plate, so as to increase the disturbance area and range of the central plate on the wastewater, which helps to reduce the combination of oil components and particulate impurities in a static, suspended or low flow rate state.

[0013] In a specific possible implementation scheme, an overflow channel is provided through the central plate, and a plurality of return plates are provided at intervals in the side walls of the overflow channel.

[0014] By adopting the above technical solution, the flow channel is used to allow wastewater to pass through the central plate, and the return plate increases the resistance of wastewater passing through the central plate and guides the wastewater to flow back in a specific direction, thereby helping to reduce the large-scale accumulation of oil components in the wastewater and increasing the difficulty of contact between particulate impurities and oil components.

[0015] In a specific feasible implementation scheme, each group of the spoiler components also includes a direction adjustment unit, and the direction adjustment unit includes an elastic lace, a connecting hook and a stop arc plate; one end of the elastic lace is connected to the flow-pushing plate, and the connecting hook is arranged at the other end of the elastic lace; the stop arc plate is arranged on the central plate, and the connecting hook is hooked with the stop arc plate to connect the central plate to the flow-pushing plate.

[0016] By adopting the above technical solution, the elastic lace is connected to the stop arc plate through a connecting hook, so that the elastic lace is tensioned between the central plate and the push plate through its own elastic deformation, thereby guiding the deformation of the push plate, reducing the large-area displacement of the push plate and causing excessive deformation of the moving parts and irreversible damage. This process ensures the application stability of the push plate and the service life of the moving parts.

[0017] In a specific possible implementation scheme, the spoiler assembly also includes a tightening unit, which includes a resistance rod, an external plate, a fixed plate and an adjusting bolt; the resistance rod is connected to one end of the external plate, the fixed plate is arranged on the central plate, and the fixed plate is provided with an internal channel for the external plate to press into and slide, and the adjusting bolt is used to connect the fixed plate and the external plate located in the inner cavity of the internal channel, so that the resistance rod is pressed against the elastic strap.

[0018] By adopting the above technical solution, the resistance rod is resisted by the external plate, the fixed plate and the elastic lacing to ensure the tension of the elastic lacing between the fixed plate and the flow-pushing plate, thereby helping to ensure the displacement stability of the flow-pushing plate; after the external plate is inserted into the inner cavity of the internal channel and displaced, the adjusting bolt is fixedly connected to the fixed plate and the external plate to adjust the distance between the resistance rod and the elastic lacing, thereby making the resistance rod press tightly against the elastic lacing.

[0019] In a specific feasible implementation scheme, the jet mechanism includes a jet air pump, an air guide pipe and an air blocking plate, the jet air pump is arranged on one side of the flow storage box, one end of the air guide pipe is connected to the output end of the jet air pump, and the other end is passed through the inner cavity of the flow storage box; the air blocking plate is arranged at the end of the air guide pipe away from the jet air pump, and a plurality of bubble channels are penetrated on the air blocking plate; the reversing mechanism includes a reversing rod and a positioning ring plate, the reversing rod is provided with a connecting groove for the air guide pipe to be plugged in, and the side wall of the connecting groove is also penetrated by a bubble outlet channel corresponding to the bubble outlet channel; the positioning ring plate is provided on the outer edge wall of the air guide pipe, and the side wall of the connecting groove is provided with a preset ring groove for the positioning ring plate to be inserted into; the driving mechanism is provided in the side wall of the flow storage box to control the reversing rod to rotate along the outer periphery of the air guide pipe, and to connect or stagger the bubble outlet channel with the bubble outlet channel.

[0020] By adopting the above technical solution, the gushing air pump ejects gas outward through the air duct, and the positioning ring plate is preset in the inner cavity of the preset ring groove to reduce the phenomenon of the reversing rod falling off the air duct; the driving mechanism controls the reversing rod to rotate along the outer periphery of the air duct, so that the bubble spraying passage corresponds to the bubble outlet channel, and the gas ejected from the air duct can form bubbles in the wastewater to break the large-scale accumulation of oil and fat components inside the wastewater or on the liquid surface, thereby helping to reduce the contact area between the oil and fat components and the particulate impurities, and reducing the phenomenon of the oil and fat components and the particulate impurities combining with each other.

[0021] In a specific possible implementation scheme, the driving mechanism includes a driving motor, a main gear ring plate and an auxiliary gear ring plate. The driving motor is arranged in the side wall of the accumulator box, the main gear ring plate is arranged on the output end of the driving motor, and the auxiliary gear ring plate is arranged on the reversing rod, and the main gear ring plate is meshed and connected with the auxiliary gear ring plate.

[0022] By adopting the above technical solution, the driving motor rotates the output end to make the main gear ring plate drive the auxiliary gear ring plate to rotate, thereby realizing the automatic rotation of the reversing rod along the outer periphery of the air guide tube, ensuring the intermittent correspondence between the bubble injection channel and the bubble outlet channel, so that a certain number of bubbles can be regularly produced in the wastewater, reducing the phenomenon of large-scale accumulation of oil components in the wastewater.

[0023] In summary, this application has the following beneficial technical effects:

[0024] 1. The flow storage mechanism is used to store wastewater to be purified. The flow driving mechanism controls all the dividing mechanisms to simultaneously disturb the water flow to reduce the phenomenon that the grease components and particulate impurities in the wastewater combine with each other in a low flow rate state or a suspended static state, making it difficult for the purification device to purify them. The air injection mechanism intermittently sprays bubbles into the wastewater through the driving mechanism and the reversing mechanism to reduce the phenomenon that the grease components accumulate in the wastewater or on the liquid surface. By reducing the area of the grease components, the contact and combination of the grease components with particulate impurities is reduced, ensuring the convenience and efficiency of the purification device in removing the grease components in the wastewater.

[0025] 2. The gushing air pump ejects gas outward through the air duct, and the positioning ring plate is preset in the inner cavity of the preset ring groove to reduce the phenomenon of the reversing rod falling off the air duct; the driving mechanism controls the reversing rod to rotate along the outer periphery of the air duct, so that the bubble spraying passage corresponds to the bubble outlet channel, and the gas ejected from the air duct can form bubbles in the wastewater to break the large-scale accumulation of oil components inside the wastewater or on the liquid surface, thereby helping to reduce the contact area between the oil components and the particulate impurities, and reducing the phenomenon of the oil components and the particulate impurities combining with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a zero-discharge system for coating wastewater in an embodiment of the present application;

[0027] Figure 2 Schematic diagram of the connection between the flow driving mechanism and the disconnecting mechanism in the embodiment of the present application;

[0028] Figure 3 Schematic diagram of the connection between the central plate and the spoiler assembly in an embodiment of the present application;

[0029] Figure 4 Schematic diagram of the connection relationship between the driving mechanism, the reversing mechanism and the jet mechanism in the embodiment of the present application;

[0030] Figure 5 It is a schematic diagram used to illustrate the reversing mechanism in the embodiment of the present application.

[0031] Description of reference numerals:

[0032] 1. Purification device; 2. Flow disturbance device; 21. Flow storage mechanism; 211. Flow storage box; 212. Side frame; 22. Flow drive mechanism; 221. Flow drive motor; 222. Extension shaft; 23. Disconnection mechanism; 231. Central plate; 2311. Flow channel; 2312. Return plate; 232. Flow disturbance assembly; 3. Bubble spraying device; 31. Jet mechanism; 311. Ejection air pump; 312. Air guide tube; 313. Air blocking plate; 3131. Bubble spraying channel; 32. Reversing mechanism; 32 1. Reversing rod; 3211. Connecting groove; 3212. Preset ring groove; 3213. Bubble outlet channel; 322. Positioning ring plate; 33. Driving mechanism; 331. Driving motor; 332. Main gear ring plate; 333. Auxiliary gear ring plate; 4. Flow-pushing plate; 5. Movable part; 6. Adjustment unit; 61. Elastic lacing; 62. Connecting hook; 63. Stop arc plate; 7. Tightening unit; 71. Resistance rod; 72. External plate; 73. Fixed plate; 731. Internal channel; 74. Adjustment bolt. DETAILED DESCRIPTION

[0033] The embodiments of the present application disclose a zero-discharge system for painting wastewater.

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] Reference Figure 1 The zero-discharge system for coating wastewater includes a purification device 1, a flow disturbance device 2 and a bubble spraying device 3. The bubble spraying device 3 is arranged on the flow disturbance device 2, and the flow disturbance device 2 is used to receive the wastewater to be purified and perform disturbance treatment on the wastewater to reduce the phenomenon of the oil and fat components in the wastewater combining with small particle impurities. The bubble spraying device 3 further reduces the phenomenon of the oil and fat components combining with small particle impurities by performing bubble spray treatment on the wastewater on the flow disturbance device 2. After the wastewater to be purified is preliminarily treated by the flow disturbance device 2 and the bubble spraying device 3, it enters the purification device 1 for purification treatment, which helps to ensure the convenience and work efficiency of the purification device 1 in removing the oil and fat components in the wastewater.

[0036] Reference Figure 1 The flow disturbance device 2 includes a flow storage mechanism 21, which in turn includes a flow storage box 211 and a side frame 212. The flow storage box 211 is bolted to the ground and located on one side of the purification device 1. The flow storage box 211 is connected to the purification device 1 via a pipe, thereby transporting the wastewater in the flow storage box 211 to the inner cavity of the purification device 1. The side frame 212 is integrally formed with the flow storage box 211 and is located on the top of the flow storage box 211.

[0037] Reference Figure 1 and Figure 2The flow-disturbing device 2 also includes a flow-driving mechanism 22 and a multi-group breaking mechanism 23, wherein the flow-driving mechanism 22 is mounted on the flow storage box 211 through a side frame 212. The flow-driving mechanism 22 includes a flow-driving motor 221 and an extension shaft 222. The flow-driving motor 221 is fixed to the top wall of the side frame 212 by bolts. The output end of the flow-driving motor 221 is passed through the side frame 212, and the output end of the flow-driving motor 221 is located in the inner cavity of the flow storage box 211. One end of the extension shaft 222 in the length direction is coaxially connected to the output end of the flow-driving motor 221 through a flange, and then the output end of the flow-driving motor 221 is rotated by the flow-driving motor 221, so that the extension shaft 222 rotates synchronously with the output end of the flow-driving motor 221.

[0038] Reference Figure 2 All the breaking mechanisms 23 are arranged on the extension shaft 222. In this embodiment, all the breaking mechanisms 23 are spaced and evenly distributed along the length direction of the extension shaft 222. The lengths of adjacent breaking mechanisms 23 are different, showing a distribution trend of one long and one short, so as to fully disturb the wastewater in the inner cavity of the flow storage box 211.

[0039] Reference Figure 2 and Figure 3 Each set of disconnecting mechanisms 23 includes a central plate 231 and two sets of flow-disrupting components 232. In this embodiment, one longitudinal end of the central plate 231 is welded to the outer wall of the extension shaft 222. A flow passage 2311 is provided through the central plate 231. The flow passage 2311 has three openings on the central plate 231: one at each end of the central plate 231 in the height direction, and another on the end wall of the central plate 231 away from the extension shaft 222. Multiple return plates 2312 are arranged at intervals inside the side walls of the flow channel 2311. All return plates 2312 are arranged in an array in the inner cavity of the flow channel 2311 to form a channel for wastewater flow. When the central plate 231 is displaced as the extension shaft 222 rotates, the wastewater is stirred and the circulation time of the wastewater on the central plate 231 is increased, so that the oil components and particulate impurities in the wastewater can be fully dispersed to reduce the phenomenon of oil components combining or adhering to particulate impurities.

[0040] Reference Figure 3, two groups of spoiler assemblies 232 are respectively located on both sides of the width direction of the central plate 231, and each group of spoiler assemblies 232 includes a flow-pushing plate 4, multiple groups of movable parts 5, a direction adjustment unit 6 and a tightening unit 7. In this embodiment, the movable part 5 can be a steel compression spring. One end of the movable part 5 in the length direction is welded to the outer wall of the central plate 231, and the flow-pushing plate 4 is welded to the end of all movable parts 5 away from the central plate 231. When the extension shaft 222 drives the central plate 231 to displace to stir the wastewater, the flow-pushing plate 4 bears the resistance when in contact with the wastewater, and through the compression deformation of the movable part 5 in the wastewater, it displaces relative to the central plate 231, so that the oil and fat components and particulate impurities in the wastewater can be fully stirred to reduce the phenomenon of the oil and fat components and the particulate components combining in a suspended or low flow rate state.

[0041] Reference Figure 3 The steering unit 6 is used to ensure the stability of the displacement of the flow-pushing plate 4 relative to the central plate 231. The steering unit 6 includes an elastic lace 61, a connecting hook 62, and a stop arc plate 63. The elastic lace 61 can be an elastic cloth belt. One end of the elastic lace 61 is fixed to the flow-pushing plate 4 by a rivet, and the connecting hook 62 is glued to the other end of the elastic lace 61.

[0042] Reference Figure 3 The stop arc plate 63 is welded to the central plate 231, and the elastic band 61 stretches itself to make the connecting hook 62 hooked on the stop arc plate 63, so that the elastic band 61 is in a tensioned state between the central plate 231 and the flow-pushing plate 4, so as to limit the flow-pushing plate 4 from excessive deformation relative to the central plate 231 and causing irreversible damage to the movable part 5 when the wastewater resistance is too large, thereby ensuring the stability of the displacement of the flow-pushing plate 4 relative to the central plate 231 and the stability of the deformation of the movable part 5.

[0043] Reference Figure 3The tightening unit 7 includes a contact rod 71, an external plate 72, a fixed plate 73, and an adjustment bolt 74. The contact rod 71 is welded to one end of the external plate 72 in the longitudinal direction, and the fixed plate 73 is welded to the central plate 231. The fixed plate 73 is provided with an internal channel 731. In this embodiment, the inner diameter of the internal channel 731 matches the outer circumference of the external plate 72. After the end of the external plate 72 away from the contact rod 71 is inserted into the inner cavity of the internal channel 731, the external plate 72 slides within the inner cavity of the internal channel 731 to adjust the distance between the contact rod 71 and the fixed plate 73, thereby maintaining the contact rod 71 in contact with the elastic band 61. At this time, the operator passes the adjusting bolt 74 through the fixing plate 73 and pushes it into the inner cavity of the internal channel 731, and finally tightens the adjusting bolt 74 into the preset thread groove on the outer wall of the external plate 72, so that one end of the external plate 72 enters the internal channel 731 and is fixed in the side wall of the internal channel 731, so as to further ensure the tension of the elastic band 61 between the push plate 4 and the central plate 231, and reduce the phenomenon of excessive displacement of the push plate 4.

[0044] Reference Figure 1 and Figure 4 The bubble spraying device 3 includes an air jet mechanism 31, a reversing mechanism 32 and a driving mechanism 33, wherein the air jet mechanism 31 further includes a gushing air pump 311, an air guide pipe 312 and an air-blocking plate 313. In this embodiment, the gushing air pump 311 can be an air supply air pump, and the gushing air pump 311 is placed on the ground on one side of the flow storage box 211. One end of the air guide pipe 312 in the longitudinal direction is connected to the air outlet end of the gushing air pump 311, and the other end is passed through the flow storage box 211 and is located in the inner cavity of the flow storage box 211. When the gushing air pump 311 blows air into the inner cavity of the flow storage box 211 through the air guide pipe 312, a certain number of bubbles emerge from the wastewater in the inner cavity of the flow storage box 211. The bubbles are used to break up the accumulation of oil components in the wastewater liquid surface, help reduce the area of ​​clustering of oil components, and further help reduce the phenomenon of oil components and particulate impurities combining with each other.

[0045] Reference Figure 4 The air-blocking plate 313 is integrally formed on the end wall of the air pipe 312 away from the gushing air pump 311 to block the opening of the air pipe 312. The air-blocking plate 313 is provided with a plurality of bubble channels 3131 through which the air in the air pipe 312 passes, thereby forming bubbles in the wastewater.

[0046] Reference Figure 4 and Figure 5The reversing mechanism 32 is used to control the number of bubbles formed. The reversing mechanism 32 includes a reversing rod 321 and a positioning ring plate 322. The positioning ring plate 322 is integrally formed on the outer peripheral wall of the air guide tube 312. A connecting groove 3211 is provided on the end wall of one end of the reversing rod 321 in the longitudinal direction. The inner diameter of the connecting groove 3211 is adapted to the outer peripheral dimension of the air guide tube 312. The side wall of the connecting groove 3211 is also provided with a preset annular groove 3212 whose inner diameter is adapted to the outer peripheral dimension of the positioning ring plate 322. The reversing rod 321 is sleeved onto one end of the air guide tube 312 located in the fluid storage chamber through the connecting groove 3211. The positioning ring plate 322 is inserted into the side wall of the preset annular groove 3212 to prevent the reversing rod 321 from freely detaching from the air guide tube 312.

[0047] Reference Figure 4 and Figure 5 A bubble outlet channel 3213 is also provided through the inner bottom wall of the connecting groove 3211. The inner diameter of the bubble outlet channel 3213 matches the inner diameter of the bubble injection channel 3131. The operator rotates the reversing rod 321 along the outer circumference of the air guide tube 312 to align the bubble outlet channel 3213 with the bubble injection channel 3131, thereby generating bubbles in the wastewater. When the reversing rod 321 is rotated so that the bubble injection channel 3131 no longer aligns with the bubble outlet channel 3213, no bubbles are generated in the wastewater.

[0048] Reference Figure 4 The drive mechanism 33 includes a drive motor 331, a main gear ring plate 332, and an auxiliary gear ring plate 333. The drive motor 331 is bolted to the side wall of the accumulator box 211. The main gear ring plate 332 is welded to the output end of the drive motor 331. The auxiliary gear ring plate 333 is welded to the outer wall of the reversing rod 321. In this embodiment, the main gear ring plate 332 and the auxiliary gear ring plate 333 mesh with each other. The drive motor 331 rotates its output end to drive the main gear ring plate 332, which in turn drives the auxiliary gear ring plate 333, thereby causing the reversing rod 321 to automatically rotate along the outer circumference of the air guide tube 312. This ensures intermittent alignment between the bubble injection channel 3131 and the bubble outlet channel 3213, resulting in regular bubbles in the wastewater and reducing the combination of oil components and particulate impurities.

[0049] The implementation principle of the zero-discharge system for coating wastewater in the embodiment of the present application is as follows: the flow-driving motor 221 rotates the output end, so that the extension shaft 222 drives all the central plates 231 to rotate in the wastewater, thereby disturbing the wastewater and reducing the phenomenon of oil components and particulate impurities in the wastewater combining with each other in a static suspended or low flow rate state.

[0050] The gushing gas is pumped into the interior of the accumulator box 211 through the air guide tube 312. The drive motor 331 rotates the main gear ring plate 332, driving the secondary gear ring plate and the reversing rod 321 to rotate along the outer circumference of the air guide tube 312. This causes the bubble channel 3131 to intermittently align with the bubble outlet channel 3213. When the bubble channel 3131 and the bubble outlet channel 3213 align, bubbles appear in the wastewater, reducing the combination of grease components and particulate impurities, thereby ensuring that the purification device 1 removes grease components from the wastewater more easily and efficiently.

[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A zero-discharge system for coating wastewater, comprising a purification device (1) for purifying wastewater, characterized in that: The coating wastewater zero discharge system further comprises a flow disturbance device (2) and a bubble spraying device (3), wherein the flow disturbance device (2) comprises a flow storage mechanism (21), a flow driving mechanism (22) and a multi-component breaking mechanism (23), wherein the flow storage mechanism (21) is connected to the purification device (1) for storing wastewater to be purified; all the breaking mechanisms (23) are arranged on the flow storage mechanism (21) through the flow driving mechanism (22) for disturbing the wastewater located in the inner cavity of the flow storage mechanism (21); the bubble spraying device (3) comprises an air jet mechanism (31), a reversing mechanism (32) and a driving mechanism (33), wherein the air jet mechanism (31) is arranged on the flow storage mechanism (21), and the air jet mechanism (31) is arranged on the flow storage mechanism (21). The reversing mechanism (32) is rotatably arranged on the jet mechanism (31) through the driving mechanism (33), so that the jet mechanism (31) performs bubble spraying treatment on the wastewater in the inner cavity of the flow storage mechanism (21); the flow storage mechanism (21) includes a flow storage box (211) and a side frame (212) arranged on the flow storage box (211); the flow driving mechanism (22) includes a flow driving motor (221) and an extension shaft (222); the flow driving motor (221) is arranged on the side frame (212); the output end of the flow driving motor (221) is passed through the side frame (212) and is connected to the extension shaft (222); all the breaking mechanisms (23) are arranged at intervals on the extension shaft (222). The connecting shaft (222) is provided with a plurality of reflow plates (2312) at intervals on the side walls of the reflow channel (2311); each of the reflow plates (232) further comprises a single-ended flow regulating plate (231) and a plurality of reflow plates (2312) arranged on opposite sides of the central plate (231); the central plate (231) is provided with a single-ended flow regulating plate (231) and a plurality of reflow plates (2312) arranged on the side walls of the reflow channel (2311); each of the reflow plates (232) further comprises ... Element (6), the direction adjustment unit (6) includes an elastic lace (61), a connecting hook (62) and a stop arc plate (63); one end of the elastic lace (61) is connected to the flow-pushing plate (4), and the connecting hook (62) is arranged on the other end of the elastic lace (61); the stop arc plate (63) is arranged on the central plate (231), and the connecting hook (62) is hooked with the stop arc plate (63), so that the central plate (231) is connected to the flow-pushing plate (4); the spoiler assembly (232) also includes a tightening unit (7), and the tightening unit (7) includes a contact rod (71), an external plate (72), a fixing plate (73) and an adjusting bolt (74);The said contact rod (71) is connected to one end of the external plate (72), the said fixed plate (73) is arranged on the central plate (231), and the said fixed plate (73) is provided with an internal connection channel (731) for the external plate (72) to be pressed into and slid, and the said adjusting bolt (74) is used to connect the said fixed plate (73) and the external plate (72) located in the inner cavity of the internal connection channel (731), so that the said contact rod (71) is pressed against the elastic lace (61).

2. The zero-discharge system for painting wastewater according to claim 1 is characterized by: The jet mechanism (31) includes a jet air pump (311), an air guide pipe (312) and an air blocking plate (313). The jet air pump (311) is arranged on one side of the flow storage box (211). One end of the air guide pipe (312) is connected to the output end of the jet air pump (311), and the other end is passed through the inner cavity of the flow storage box (211). The air blocking plate (313) is arranged at the end of the air guide pipe (312) away from the jet air pump (311), and a plurality of bubble channels (3131) are provided on the air blocking plate (313). The reversing mechanism (32) includes a reversing rod (321) and a positioning ring plate (322). The reversing rod (321) is provided with a The connecting groove (3211) is provided for plugging the air guide tube (312), and a bubble outlet channel (3213) corresponding to the bubble ejection channel (3131) is provided through the side wall of the connecting groove (3211); the positioning ring plate (322) is provided on the outer edge wall of the air guide tube (312), and a preset ring groove (3212) for the positioning ring plate (322) to be inserted is provided in the side wall of the connecting groove (3211); the driving mechanism (33) is provided in the side wall of the flow storage box (211) to control the reversing rod (321) to rotate along the outer periphery of the air guide tube (312), and to connect or dislocate the bubble outlet channel (3213) with the bubble ejection channel (3131).

3. The zero-discharge system for painting wastewater according to claim 2 is characterized by: The driving mechanism (33) comprises a driving motor (331), a main gear ring plate (332) and an auxiliary gear ring plate (333); the driving motor (331) is arranged in the side wall of the accumulator box (211); the main gear ring plate (332) is arranged on the output end of the driving motor (331); the auxiliary gear ring plate (333) is arranged on the reversing rod (321); and the main gear ring plate (332) and the auxiliary gear ring plate (333) are meshed and connected.

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