Water-based waste paint reduction treatment device

Abstract

The utility model discloses a water-based waste paint reduction treatment device, and relates to water-based waste paint post-treatment. The utility model provides a water-based waste paint reduction treatment device. The water-based waste paint reduction treatment device comprises a water tank, a stirring mechanism, a paint slag treatment mechanism and a wastewater discharge mechanism. The paint slag treatment mechanism is arranged in the water tank and suitable for loading waste paint and separated paint slag. The stirring end of the stirring mechanism is arranged in the paint slag treatment mechanism, and the wastewater discharge mechanism is arranged in the paint slag treatment mechanism and is suitable for extracting the separated aqueous solvent. Through the arrangement, separation of water-based waste paint can be accelerated, and a water-based solvent and paint slag separated from the water-based waste paint are treated separately, so that the treatment cost of the water-based waste paint is reduced, and the burden of wastewater treatment is relieved. Meanwhile, the structure is simple, the cost is low, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the field of post-treatment of water-based waste paint, in particular to a water-based waste paint reduction treatment device. Background Art

[0002] Water-based waste paint is mainly generated in coating production lines, especially automobile coating production lines. After the daily coating line is shut down, when resuming production, it is often necessary to discharge the paint that originally remained in the paint delivery pipeline and collect it in the waste paint bucket, or after spraying some niche colors or paint for debugging, the excess paint will also be discharged and collected in the waste paint bucket, and these paints will eventually become waste paint. Generally, a coating workshop will produce several tons to tens of tons of waste paint per month. The main component of waste paint is paint resin, accounting for about 30%, and the rest is water-based solvents. At present, it is transported out as hazardous waste for incineration and disposal, and manufacturers need to spend high hazardous waste disposal costs for this.

[0003] In order to reduce the cost of hazardous waste disposal, some manufacturers have also tried to discharge waste paint into wastewater treatment stations. However, since waste paint contains a large amount of paint resin, it is easy to block the delivery pipeline. In addition, if waste paint is directly discharged into the wastewater system for treatment, it will also block the wastewater treatment facilities. At the same time, the paint resin and aqueous solvent contained will bring great burden to the wastewater treatment, especially the biochemical treatment system, and even lead to the risk of excessive discharge.

[0004] Therefore, it is urgent to develop a simple, reliable, and low-cost reduction treatment device to separate the paint resin component in the waste paint and treat it as hazardous waste. The remaining aqueous solvent can be transported to the wastewater station for further treatment, thereby reducing the cost of hazardous waste disposal and alleviating the burden of wastewater treatment. Utility Model Content

[0005] In order to solve the above problems, the present application provides a water-based waste paint reduction treatment device, which is a device for separately treating the aqueous solvent and paint residue after the separation of the water-based waste paint.

[0006] The present application provides a water-based waste paint reduction treatment device comprising a water tank, a stirring mechanism, a paint residue treatment mechanism and a wastewater discharge mechanism. The paint residue treatment mechanism is arranged in the water tank and is suitable for loading waste paint and separated paint residue. The stirring end of the stirring mechanism is arranged in the paint residue treatment mechanism, and the wastewater discharge mechanism is arranged in the paint residue treatment mechanism and is suitable for extracting the separated aqueous solvent.

[0007] In a specific embodiment, the stirring mechanism includes a fixed bracket, a stirring cylinder and a stirrer. The fixed bracket is arranged above the water tank, the fixed end of the stirring cylinder is connected to the fixed bracket, and the piston rod of the stirring cylinder is detachably connected to the stirrer. The stirrer also includes a stirring frame and a plurality of stirring plates arranged in the stirring frame, and there is a spacing between the stirring plates.

[0008] In a specific embodiment, the stirring mechanism further comprises an extension rod and a plurality of connecting rods. One end of the extension rod is connected to the piston rod of the stirring cylinder, and the other end is detachably connected to the stirrer. One end of the connecting rod is connected to the stirring frame, and the other end is connected to the extension rod.

[0009] In a specific embodiment, the width of the stirring plate is 8 to 12 cm. And / or, the inclination angle of the stirring plate is 25° to 45°. And / or, the spacing between the stirring plates is 8 to 12 cm.

[0010] In a specific embodiment, the materials of the stirrer, the extension rod and the connecting rod are independently selected from any one of PVC, stainless steel or carbon steel.

[0011] In a specific embodiment, the paint residue treatment mechanism includes a first treatment member and a second treatment member, wherein the first treatment member is arranged in the water tank, and the second treatment member is arranged in the first treatment member. The first treatment member is also provided with a plurality of lifting ears, which are suitable for lifting the first treatment member.

[0012] In a specific embodiment, the wastewater discharge mechanism includes a pump body and a water pumping pipe. The liquid outlet end of the water pumping pipe is connected to the pump body, and the liquid inlet end of the water pumping pipe is arranged in the waste paint.

[0013] In a specific embodiment, a float is also provided on the liquid inlet end of the water pumping pipe, and the float floats on the surface of the waste paint liquid. And / or, the wastewater discharge mechanism also includes a filter, and the water pumping pipe is inserted into the filter.

[0014] In one embodiment, the pump body is selected from a centrifugal pump or a pneumatic diaphragm pump.

[0015] In a specific embodiment, a universal wheel is provided at the bottom of the water tank. And / or, the volume of the water tank 1 is 1 to 2 m 3 . And / or, the material of the water tank 1 is selected from any one of PVC, stainless steel or carbon steel. And / or, the wall thickness of the water tank 1 is 2 to 10 mm.

[0016] The water-based waste paint reduction treatment device involved in this application has the following beneficial effects:

[0017] 1) The present application can accelerate the separation of water-based waste paint, and treat the water-based solvent and paint residue separated from the water-based waste paint separately, thereby reducing the treatment cost of the paint residue and alleviating the burden of wastewater treatment. At the same time, the present application has a simple structure, low cost and high practicality.

[0018] 2) The stirring mechanism designed in this application adopts up and down plug flow stirring. Although the paint residue will adhere to the stirring frame and the stirring plate, due to the spacing between the stirring plates, the paint residue will not block the spacing in a short time, thereby ensuring the effectiveness of stirring.

[0019] 3) The paint residue treatment mechanism designed in the present application can effectively prevent the paint residue from directly contacting the water tank, and can wrap the paint residue after separation of water-based waste paint in the first treatment member and the second treatment member. At the same time, the second treatment member can further prevent the paint residue from leaking out of the gap of the first treatment member. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model when the water-based waste paint is not separated.

[0021] Figure 2 It is a schematic diagram of the overall structure of the utility model when the separation of water-based waste paint is completed.

[0022] Figure 3 It is a structural schematic diagram of the agitator of the utility model.

[0023] Reference numerals

[0024] Water tank 1

[0025] Stirring mechanism 2

[0026] Fixed bracket 21

[0027] Mixing cylinder 22

[0028] Mixer 23

[0029] Mixing frame 23.1

[0030] Stirring plate 23.2

[0031] Extension rod 24

[0032] Connecting rod 25

[0033] Paint residue treatment mechanism 3

[0034] First processing part 31

[0035] Lifting lug 31.1

[0036] Second processing member 32

[0037] Wastewater discharge agency4

[0038] Pump body 41

[0039] Pumping pipe 42

[0040] Float 42.1

[0041] Filter 43 DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "left side", "right side", "upper side", "lower side", "above", "below", "inside", "outside", "upper layer", "lower layer" and the like are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0045] Before describing the structure of the present application in detail, we will first briefly describe how to separate the water-based waste paint: In the present application, the separation of the water-based waste paint uses a water-based waste paint demulsifier, which is an acid or a salt. The separation principle when using an acid is that, since the water-based waste paint itself is alkaline, by adding an acid agent, the pH environment of the waste paint is changed to demulsify the waste paint, and the paint resin is destabilized and precipitated to form a sticky paste-like paint residue. Figure 2 As shown, the separated paint residue (mainly viscous paste-like paint residue) will settle at the bottom of the aqueous solvent.

[0046] Further, the acid agents that can be used include sulfuric acid, hydrochloric acid, nitric acid, citric acid, aminosulfonic acid, acetic acid, etc. Considering the safety and economy of operation, aminosulfonic acid or citric acid is preferred, which is strong in acidity, relatively safe in addition operation, and can be added in solid form, and the addition efficiency is high. When salts are used, the salts used need to have strong electrolyte properties, which can change the dissolution system in the waste paint, so that the paint resin is separated from the waste paint after the waste paint is demulsified. Sodium salts such as sodium chloride, sodium sulfate, sodium carbonate, and sodium nitrate are easily available, preferably sodium chloride, which is cheap and safe to operate. Aluminum-iron salts such as aluminum chloride, ferric chloride, ferric sulfate, polyaluminum chloride, polyferric sulfate, and ferrous sulfate can also be selected. Such salts are hydrolyzed in a slightly acidic state, which simultaneously plays a role in changing the pH environment and dissolution system of the waste paint, so that the paint resin is quickly precipitated. Ferric chloride is preferred here, which is a strong electrolyte, cheap, and has a lower pH after dissolution.

[0047] The present application provides a water-based waste paint reduction treatment device, see Figure 2 , including a water tank 1, a stirring mechanism 2, a paint residue treatment mechanism 3 and a wastewater discharge mechanism 4. The paint residue treatment mechanism 3 is arranged in the water tank 1, and is suitable for loading waste paint and separated paint residue. The stirring end of the stirring mechanism 2 is arranged in the paint residue treatment mechanism 3, and the wastewater discharge mechanism 4 is arranged in the paint residue treatment mechanism 3 and is suitable for extracting the separated aqueous solvent. When the present application is used, the aqueous waste paint is first poured into the water tank 1 and the paint residue treatment mechanism 3, and an aqueous waste paint demulsifier is added. Subsequently, the stirring mechanism 2 stirs the aqueous waste paint to accelerate the separation of the aqueous waste paint into the aqueous solvent located in the upper layer and the paint residue located in the lower layer. Then, the wastewater discharge mechanism 4 extracts the aqueous solvent in the upper layer, leaving only the paint residue. Finally, the paint residue is packaged and transported for treatment by the paint residue treatment mechanism 3. Through the above-mentioned settings, the present application can accelerate the separation of aqueous waste paint, and separately treat the aqueous solvent and paint residue separated from the aqueous waste paint, thereby reducing the treatment cost of the paint residue and alleviating the burden of wastewater treatment. At the same time, the present application has a simple structure, low cost and high practicality.

[0048] In one specific embodiment, see Figure 1 or Figure 2 The water tank 1 is provided with a universal wheel 11 at the bottom, which can be used to push the water tank 1 to move. At the same time, the universal wheel 11 is equipped with a locking device, which can lock the universal wheel 11 so that it cannot move when separating the water-based waste paint, thereby ensuring the safety of the separation of the water-based waste paint. Furthermore, the volume of the water tank 1 is 1 to 2 m 3 The material of the water tank 1 is selected from any one of PVC, stainless steel or carbon steel, and the wall thickness of the water tank 1 is 2 to 10 mm. Preferably, the volume of the water tank 1 is 2m 3The material of the water tank 1 is stainless steel, and the wall thickness of the water tank 1 is ≥2mm. On the one hand, the stainless steel material can effectively prevent the corrosion of the acidic environment of water-based waste paint. On the other hand, it is simple to process and manufacture, does not require anti-corrosion treatment, and is light in weight and easy to push.

[0049] Further, see Figure 1 or Figure 2 The stirring mechanism 2 includes a fixed bracket 21, a stirring cylinder 22 and an agitator 23. The fixed bracket 21 is arranged above the water tank 1, the fixed end of the stirring cylinder 22 is connected to the fixed bracket 21, and the piston rod of the stirring cylinder 22 is detachably connected to the agitator 23. When stirring the water-based waste paint, the stirring cylinder 22 continuously extends and retracts, and the agitator 23 continuously extends and retracts following the stirring cylinder 22, thereby stirring the water-based waste paint in an up-and-down push-flow manner. For further information, refer to Figure 3 , the agitator 23 also includes a stirring frame 23.1 and several stirring plates 23.2 arranged in the stirring frame 23.1, and there is a gap between each of the stirring plates 23.2. Since the water-based waste paint will produce viscous paste paint residue when the demulsifier is added, by contrast, if a rotary mixer impeller is used for stirring, the impeller will be quickly adhered to the paint residue, causing the impeller to be completely wrapped by the paint residue, losing the stirring function, and even being unable to rotate in severe cases. Therefore, the stirring mechanism 2 designed in the present application adopts the stirring of the upper and lower plug flow type. Although the paint residue will also adhere to the stirring frame 23.1 and the stirring plate 23.2, due to the spacing between the stirring plates 23.2, the paint residue will not block the spacing in a short time, thereby ensuring the effectiveness of the stirring. In addition, the stirring cylinder 22 can effectively control the speed and frequency of the agitator 23 moving up and down by controlling the cylinder intake pressure and the frequency of switching the intake direction.

[0050] In one specific embodiment, see Figure 3 , the stirring frame 23.1 and the stirring plate 23.2 are both rectangular structures, and five stirring plates 23.2 are arranged in the stirring frame 23.1. In a preferred embodiment, each stirring plate 23.2 is penetrated by a shaft, and the two ends of the shaft are respectively connected to the two opposite ends of the stirring frame 23.1, and the spacing between each stirring plate 23.2 (that is, the spacing between the shafts) is 8 to 12 cm, preferably 10 cm, and the width of each stirring plate 23.2 is 8 to 12 cm, preferably 10 cm. The inclination angle of each stirring plate 23.2 (that is, the angle between the stirring plate 23.2 and the plane where the stirring frame 23.1 is located after inclination) is 25° to 45°, preferably 25°, 30°, 35°, 40°, 45°. Through the arrangement of this embodiment, not only is it less likely to accumulate paint residue on the stirring frame 23.1 and the stirring plate 23.2, but it can also maximize the stirring effect and further accelerate the separation of water-based waste paint.

[0051] Further, see Figure 1 to Figure 3 The stirring mechanism 2 also includes an extension rod 24 and a plurality of connecting rods 25. One end of the extension rod 24 is connected to the piston rod of the stirring cylinder 22, and the other end is detachably connected to the stirrer 23. In a specific embodiment, a flange is provided at the connection between the extension rod 24 and the stirring cylinder 22, which can not only enhance the connection strength between the extension rod 24 and the stirring cylinder 22, but also enable the stirrer 23 to be removed for flushing or maintenance when too much paint residue accumulates on the stirrer 23 or when maintenance is required. Figure 3 , one end of the connecting rod 25 is connected to the stirring frame 23.1, and the other end is connected to the extension rod 24. In a preferred embodiment, the stirring frame 23.1 is rectangular and the connecting rods 25 are provided at the four corners to enhance the connection strength between the connecting rod 25 and the stirring frame 23.1. In addition, the materials of the agitator 23, the extension rod 24 and the connecting rod 25 are independently selected from any one of PVC, stainless steel or carbon steel. Preferably, the materials of the agitator 23, the extension rod 24 and the connecting rod 25 are stainless steel, which can effectively prevent corrosion in the acidic environment of water-based waste paint.

[0052] Further, see Figure 1 or Figure 2 The paint residue treatment mechanism 3 includes a first treatment member 31 and a second treatment member 32. The first treatment member 31 is disposed in the water tank 1, and the second treatment member 32 is disposed in the first treatment member 31. Figure 1 or Figure 2 The first treatment member 31 is also provided with a plurality of lifting ears 31.1, which are suitable for lifting the first treatment member 31. In a specific embodiment, the first treatment member 31 is a woven bag, and the second treatment member 32 is a film bag. Before treating the water-based waste paint, the first treatment member 31 is first laid in the water tank 1. Generally speaking, the volume of the first treatment member 31 is slightly larger than the water tank 1, so as to ensure that the first treatment member 31 can be laid completely inside the water tank 1 while leaving a portion outside the water tank 1, such as Figure 1As shown in Fig. 2, the first treatment piece 31 remaining outside the water tank 1 can be hung on the side wall of the water tank 1 and fixed with a clamping tool, etc. At the same time, the lifting lug 31.1 should also be located outside the water tank 1. Subsequently, the second treatment piece 32 is laid close to the first treatment piece 31, and the volume of the second treatment piece 32 should also be slightly larger than the water tank 1, so as to ensure that the second treatment piece 32 can be laid entirely inside the first treatment piece 31 while leaving a portion outside the water tank 1. Preferably, the first treatment piece 31 and the second treatment piece 32 are both disposable, and the material of the second treatment piece 32 is plastic. Through the above arrangement, the paint residue can be effectively prevented from directly contacting the water tank 1, and the paint residue after separation of the water-based waste paint can be wrapped in the first treatment piece 31 and the second treatment piece 32. At the same time, the second treatment piece 32 can further prevent the paint residue from leaking out of the gap of the first treatment piece 31. After the separation of the aqueous waste paint is completed, the upper aqueous solvent is pumped away by the wastewater discharge mechanism 4, and the paint residue in the lower layer remains in the second treatment part 32 and the first treatment part 31. Then the lifting ear 31.1 on the first treatment part 31 is hung on the hook of a crane or a lift, and then the first treatment part 31 is lifted together with the second treatment part 32 and the paint residue and transported to other places for treatment.

[0053] Further, see Figure 2 The wastewater discharge mechanism 4 includes a pump body 41 and a water pump 42. The pump body 41 is selected from a centrifugal pump or a pneumatic diaphragm pump. Preferably, the pump body 41 is a pneumatic diaphragm pump, which will not cause damage even when it is empty. Figure 2 The outlet end of the water pumping pipe 42 is connected to the pump body 41, and the inlet end of the water pumping pipe 42 is arranged in the waste paint. Figure 2 , a float 42.1 is also provided on the liquid inlet end of the pumping pipe 42, and the float 42.1 floats on the surface of the waste paint liquid, and enables the liquid inlet end of the pumping pipe 42 to also float on the surface of the waste paint liquid, which can prevent the pumping pipe 42 from sucking the paint residue in the lower layer. In a preferred embodiment, the wastewater discharge mechanism 4 also includes a filter 43, and the filter 43 is arranged between the float 42.1 and the pump body 41. The pumping pipe 42 is passed through the filter 43, and the filter 43 can effectively intercept the paint residue that may be sucked to prevent the pump body 41 from being blocked. Specifically, the material of the filter 43 is stainless steel, which can effectively prevent the corrosion of the acidic environment of the water-based waste paint. Preferably, the filter 43 can be a blue filter containing a stainless steel filter mesh or a bag filter containing a filter bag, which is more convenient to clean.

[0054] The present embodiment also provides a method for using the present application, and the specific method is as follows: 1) first lay the first treatment piece 31 in the water tank 1, and lay the second treatment piece 32 in the first treatment piece 31; 2) pour the water-based waste paint into the water tank 1 where the first treatment piece 31 and the second treatment piece 32 have been laid; 3) add a demulsifier to allow the water-based waste paint to begin to separate into a water-based solvent and paint residue; 4) control the stirring cylinder 22 so that the stirrer 23 stirs up and down to accelerate the separation of the water-based waste paint; 5) start the pump body 41 and extract the upper layer of water-based solvent separated in the water tank 1 through the suction pipe 42, leaving the lower layer of paint residue; 6) pack the first treatment piece 31 and the second treatment piece 32, and the remaining lower layer of paint residue is wrapped in the first treatment piece 31 and the second treatment piece 32, and is transported together to other places for treatment.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A water-based waste paint reduction treatment device, characterized in that: It comprises a water tank (1), a stirring mechanism (2), a paint residue processing mechanism (3) and a wastewater discharge mechanism (4); The paint residue treatment mechanism (3) is arranged in the water tank (1) and is suitable for loading waste paint and separated paint residue; the stirring end of the stirring mechanism (2) is arranged in the paint residue treatment mechanism (3); the wastewater discharge mechanism (4) is arranged in the paint residue treatment mechanism (3) and is suitable for extracting the separated aqueous solvent.

2. The waste paint reduction treatment device according to claim 1 is characterized in that: The stirring mechanism (2) comprises a fixed support (21), a stirring cylinder (22) and a stirrer (23); The fixed bracket (21) is arranged above the water tank (1); the fixed end of the stirring cylinder (22) is connected to the fixed bracket (21); the piston rod of the stirring cylinder (22) is detachably connected to the stirrer (23); the stirrer (23) further comprises a stirring frame (23.1) and a plurality of stirring plates (23.2) arranged in the stirring frame (23.1); and there is a spacing between each stirring plate (23.2).

3. The waste paint reduction treatment device according to claim 2 is characterized in that: The stirring mechanism (2) further comprises an extension rod (24) and a plurality of connecting rods (25); One end of the extension rod (24) is connected to the piston rod of the stirring cylinder (22), and the other end is detachably connected to the stirrer (23); one end of the connecting rod (25) is connected to the stirring frame (23.1), and the other end is connected to the extension rod (24).

4. The waste paint reduction treatment device according to claim 2 or 3, characterized in that: The width of the stirring plate (23.2) is 8 to 12 cm; and / or the inclination angle of the stirring plate (23.2) is 25° to 45°; and / or the spacing between the stirring plates (23.2) is 8 to 12 cm.

5. The waste paint reduction treatment device according to claim 3 is characterized in that: The materials of the stirrer (23), the extension rod (24) and the connecting rod (25) are independently selected from any one of PVC, stainless steel or carbon steel.

6. The waste paint reduction treatment device according to claim 1 is characterized in that: The paint residue treatment mechanism (3) comprises a first treatment member (31) and a second treatment member (32); the first treatment member (31) is arranged in the water tank (1), and the second treatment member (32) is arranged in the first treatment member (31); the first treatment member (31) is also provided with a plurality of lifting ears (31.1), and the lifting ears (31.1) are suitable for lifting the first treatment member (31).

7. The waste paint reduction treatment device according to claim 1 is characterized in that: The wastewater discharge mechanism (4) comprises a pump body (41) and a water pumping pipe (42); the liquid outlet end of the water pumping pipe (42) is connected to the pump body (41), and the liquid inlet end of the water pumping pipe (42) is arranged in the waste paint.

8. The waste paint reduction treatment device according to claim 7 is characterized in that: A float (42.1) is also provided on the liquid inlet end of the water suction pipe (42), and the float (42.1) floats on the surface of the waste paint liquid; and / or the wastewater discharge mechanism (4) also includes a filter (43), and the filter (43) is arranged between the float (42.1) and the pump body (41), and the water suction pipe (42) is passed through the filter (43).

9. The waste paint reduction treatment device according to claim 7, characterized in that: The pump body (41) is selected from a centrifugal pump or a pneumatic diaphragm pump.

10. The waste paint reduction treatment device according to claim 1, characterized in that: The lower part of the water tank (1) is provided with a universal wheel (11); and / or the volume of the water tank (1) is 1 to 2 m 3 ; and / or, the material of the water tank (1) is selected from any one of PVC, stainless steel or carbon steel; and / or, the wall thickness of the water tank (1) is 2 to 10 mm.

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