Waste liquid recovery system and working method
By designing a waste liquid recovery system controlled by liquid level sensor in the paint spraying process, ensuring that the paint flows back and forth between the pipelines, the pipeline blockage caused by the shutdown of the paint spraying process is solved, and the recycling efficiency is improved and maintenance costs are reduced.
Patent Information
- Application Number
- CN202411550047.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2024-12-17
AI Technical Summary
The long-term shutdown of the paint process causes the paint in the pipeline to condense, resulting in paralysis of the recycling system, requiring frequent replacement of the pipeline, increasing maintenance costs, and may cause waste liquid to flow into the circulating water in the paint room, causing VOC to exceed the standard.
A waste liquid recycling system was designed, including a small recycling tank, a large recycling tank and a centralized recycling tank. The start and stop of the pump body is controlled through a liquid level sensor to ensure that the paint flows back and forth between the delivery pipeline and the recycling pipeline to avoid paint. For long-term accumulation, pneumatic diaphragm pumps and check valves are used to improve safety and flowability.
It effectively avoids the accumulation and condensation of paint in the pipeline, reduces the probability of system paralysis, saves detergent, improves paint recycling efficiency, and reduces maintenance costs.
Smart Images
Figure CN119140329A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of paint spraying, and in particular to a waste liquid recovery system and a working method. Background Art
[0002] During the painting process, excess paint sprayed from the spray gun will fall to the ground, and fall into the small recovery tank on the lower side through the gap in the ground, and finally the paint in the small recovery tank will be collected into the centralized recovery tank through the pipeline. However, if the paint production line is not in operation, the stored liquid in all pipelines is in a static state. As the use time increases, the waste liquid with high viscosity and large paint content in the pipeline will gradually dry and condense, eventually leading to pipeline blockage, paralysis of the entire recovery system, and the need to replace the pipeline, which has a high maintenance cost. In addition, the small recovery tank is installed in the paint spraying room, and the centralized recovery tank is placed in the paint mixing room. The distance between the two is far, and the pipeline for conveying paint will have more height differences and turns during the conveying process, which will slow down the flow rate of the paint in the pipeline, and the problem of high-viscosity waste liquid accumulation in the overall recovery pipeline will occur frequently. Once the pipeline is blocked, the entire waste liquid recovery device will be paralyzed, which will directly affect the efficiency of paint recovery, and may also cause the waste liquid to flow directly into the circulating water in the paint spraying room, causing the VOC value to exceed the standard. Summary of the invention
[0003] The purpose of the present invention is to provide a waste liquid recovery system and a working method to solve the problem in the prior art that the paint spraying process is shut down for a long time, the paint in the pipeline will condense, and the system will be paralyzed.
[0004] To achieve this purpose, the present invention adopts the following technical scheme: the present invention provides a waste liquid recovery system, comprising a small recovery tank, a large recovery tank and a centralized recovery tank, the small recovery tank recovers paint in a paint spraying room, the centralized recovery tank is connected to the small recovery tank through a first pump body, a delivery pipeline and a recovery pipeline are connected between the centralized recovery tank and the large recovery tank, a second pump body is installed in the delivery pipeline, a third pump body is installed in the recovery pipeline, a check valve is installed in the delivery pipeline and the recovery pipeline, the second pump body transports paint to the centralized recovery tank, the third pump body transports paint to the large recovery tank, a first liquid level sensor is installed in the small recovery tank, a second liquid level sensor is installed in the large recovery tank, and a third liquid level sensor is installed in the centralized recovery tank; the first liquid level sensor, the second liquid level sensor and the third liquid level sensor are electrically connected to a controller, and the controller can control the start and stop of the first pump body, the second pump body and the third pump body respectively.
[0005] Preferably, a grid plate is formed on the floor of the spray painting room, a small recovery tank is installed on the lower side of the grid plate, a large recovery tank is installed on the upper side of the grid plate, and the large recovery tank is installed directly above the small recovery tank.
[0006] Preferably, one side of the paint booth is a mechanical spray area, and the other side of the paint booth is a hand spray area. A small recovery tank is installed between the hand spray area and the mechanical spray area. U-shaped grooves are extended on both sides of the small recovery tank. The U-shaped groove is inclined, and the lower end of the U-shaped groove is connected to the small recovery tank.
[0007] Preferably, the mechanical spraying area is provided with two rows of mechanical nozzle processing areas, the hand spraying area is provided with two rows of hand spraying processing areas, the U-shaped groove corresponds one-to-one with the mechanical nozzle processing areas, and the U-shaped groove also corresponds one-to-one with the hand spraying processing areas.
[0008] Preferably, a collecting box is installed at the lower end of the U-shaped groove, paint can be collected in the collecting box, and the small recovery tank is installed at the bottom of the collecting box.
[0009] Preferably, the first pump body, the second pump body and the third pump body are pneumatic diaphragm pumps.
[0010] A working method of a waste liquid recovery system, comprising the waste liquid recovery system, further comprising the following steps:
[0011] S1, the paint in the mechanical nozzle processing area and the hand spray processing area drips into the U-shaped groove, and the paint is collected in a small recovery tank;
[0012] S2, the first liquid level sensor detects that the paint has reached the upper limit, and the first pump body is turned on, and the paint flows from the small recovery tank into the large recovery tank;
[0013] S3, the first liquid level sensor detects that the paint has reached the lower limit, and the first pump body is closed. The second liquid sensor detects that the paint has reached the upper limit, and the second pump body is opened, and the paint enters the centralized recovery tank. At the same time, the third pump body is in the closed state;
[0014] S4, the second liquid level sensor detects that the paint has reached the lower limit, the second pump body is closed, and the third pump body is opened. If the third liquid level sensor reaches the upper limit, repeat step S3.
[0015] Beneficial effects: First, the oil in the small recovery tank is concentrated by the large recovery tank, and a recovery pipeline is added between the centralized recovery tank and the large recovery tank, so that the paint can flow back and forth between the centralized recovery tank and the large recovery tank, avoiding the paint from accumulating in the same tank for a long time, making the paint in the delivery pipeline and the recovery pipeline always in a flowing state, avoiding the paint from accumulating in the pipeline, saving detergent and reducing the probability of system paralysis. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is the main body diagram of the waste liquid recovery system of the present invention;
[0017] Figure 2It is a schematic diagram of the installation of the U-shaped groove of the present invention.
[0018] In the picture: 1. Small recycling tank; 2. Large recycling tank; 3. Centralized recycling tank; 4. Paint spraying room; 5. Mechanical spraying area; 6. Hand spraying area; 7. U-shaped trough; 8. Collection box; 9. Grid plate. DETAILED DESCRIPTION
[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0022] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0023] Under the existing technology, paint enters the centralized recovery tank along the small recovery tank. However, if the painting process is stagnant for a long time, the paint in the pipeline will condense and become blocked. At the same time, the distance from the small recovery tank to the centralized recovery tank is long, which makes the flow rate of the paint low and makes it easy for the paint to condense in the pipeline, causing the entire system to be paralyzed and need to be replaced completely.
[0024] In order to solve the above problems, Figure 1 to Figure 2 As shown, the present invention provides a waste liquid recovery system, which includes a small recovery tank 1, a large recovery tank 2 and a centralized recovery tank 3. The small recovery tank 1 recovers paint in a paint spraying room 4. The centralized recovery tank 3 is connected to the small recovery tank 1 through a first pump body. A delivery pipeline and a recovery pipeline are connected between the centralized recovery tank 3 and the large recovery tank 2. A second pump body is installed in the delivery pipeline, a third pump body is installed in the recovery pipeline, and a check valve is installed in the delivery pipeline and the recovery pipeline. The second pump body transports the paint to the centralized recovery tank 3, and the third pump body transports the paint to the large recovery tank 2. A first liquid level sensor is installed in the small recovery tank 1, a second liquid level sensor is installed in the large recovery tank 2, and a third liquid level sensor is installed in the centralized recovery tank 3.
[0025] The first liquid level sensor, the second liquid level sensor and the third liquid level sensor are electrically connected to the controller, and the controller can control the first pump body, the second pump body and the third pump body to work respectively. The large recovery tank 2 can collect the paint in multiple small recovery tanks 1. The distance between the large recovery tank 2 and the small recovery tank 1 is relatively close, so that the paint is first concentrated in the large recovery tank 2, and a single transmission path is formed in the large recovery tank 2 and the centralized recovery tank 3, thereby reducing the number of pipelines and reducing the cost of cleaning and replacing pipelines. At the same time, the height difference between the large recovery tank 2 and the centralized recovery tank 3 is unified, so that the number of pipeline bends between the large recovery tank 2 and the centralized recovery tank 3 is reduced, thereby increasing the flow rate of the paint and reducing the probability of paint condensation. At the same time, the paint is transported back and forth between the centralized recovery tank 3 and the large recovery tank 2, so that the paint does not stay in a single position for a long time, thereby increasing the fluidity of the paint and preventing accumulation and condensation. After the paint in the large recovery tank 2 is full, it is transported to the centralized recovery tank 3 through the second pump body. If the paint in the centralized recovery tank 3 is full, it will be transported back to the large recovery tank 2 to achieve the back and forth flow of the paint, avoiding long-term stagnation of the paint and solidification.
[0026] A mesh plate 9 is formed on the floor of the spray booth 4. The sprayed paint will pass through the mesh plate 9. The sight of the personnel on the upper side can also pass through the mesh plate 9 to timely monitor the paint flow direction on the lower side. A small recovery tank 1 is installed on the lower side of the mesh plate 9, and a large recovery tank 2 is installed on the upper side of the mesh plate 9. The large recovery tank 2 is installed directly above the small recovery tank 1. The paint in the small recovery tank 1 on the lower side can be directly sent to the large recovery tank 2 through the first pump body, and the paint is preliminarily collected, reducing the number of pipelines leading to the centralized recovery tank 3.
[0027] One side of the paint booth 4 is a mechanical spray area 5, and the other side of the paint booth 4 is a hand spray area 6. A small recovery tank 1 is installed between the hand spray area 6 and the mechanical spray area 5. U-shaped grooves 7 are extended on both sides of the small recovery tank 1. The U-shaped grooves 7 are inclined, and gravity can be used to guide the oil into the small recovery tank 1 to avoid oil accumulation. The lower end of the U-shaped groove 7 is connected to the small recovery tank 1, and the paint will fall directly into the U-shaped groove 7 to collect the paint.
[0028] The mechanical spraying area 5 is provided with two rows of mechanical nozzle processing areas, and the hand spraying area 6 is provided with two rows of hand spraying processing areas. The U-shaped grooves 7 correspond to the mechanical nozzle processing areas one by one, and the U-shaped grooves 7 also correspond to the hand spraying processing areas one by one, so that all paints can be recycled. A U-shaped groove 7 is installed on the lower side of each spraying area. Different U-shaped grooves 7 guide the paint into different small recovery tanks 1. The small recovery tank 1 guides the paint into the large recovery tank 2 through the first pump body, reducing the number of pipelines leading to the centralized recovery tank 3 and reducing the cleaning cost and difficulty.
[0029] A collection box 8 is installed at the lower end of the U-shaped groove 7, and paint can be collected in the collection box 8. A small recovery tank 1 is installed at the bottom of the collection box 8. The collection box 8 is directly connected to the small recovery tank 1 to guide all the paint into the small recovery tank 1. The first pump body, the second pump body and the third pump body are pneumatic diaphragm pumps, which can improve safety. The paint processed by the present invention is a combustible material, so the use of pneumatic components can improve safety during the working process and avoid igniting the paint. At the same time, by adding a one-way valve, oil reflux can be avoided to achieve interlocking of recovery and circulation.
[0030] The present invention also provides a working method of a waste liquid recovery system, comprising the following steps:
[0031] S1, the paint in the mechanical nozzle processing area and the hand spray processing area drips into the U-shaped groove 7, and the paint is collected in the small recovery tank 1;
[0032] S2, the first liquid level sensor detects that the paint has reached the upper limit, and the first pump body is turned on, and the paint flows from the small recovery tank 1 into the large recovery tank 2;
[0033] S3, the first liquid level sensor detects that the paint has reached the lower limit, and the first pump body is closed. The second liquid sensor detects that the paint has reached the upper limit, and the second pump body is opened, and the paint enters the centralized recovery tank 3, while the third pump body is in the closed state;
[0034] S4, the second liquid level sensor detects that the paint has reached the lower limit, the second pump body is closed, and the third pump body is opened. If the third liquid level sensor reaches the upper limit, repeat step S3.
[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.
Claims
1. A waste liquid recovery system, characterized in that: The invention comprises a small recovery tank (1), a large recovery tank (2) and a centralized recovery tank (3), wherein the small recovery tank (1) recovers paint from a paint spraying room (4), the centralized recovery tank (3) is connected to the small recovery tank (1) through a first pump body, a delivery pipeline and a recovery pipeline are connected between the centralized recovery tank (3) and the large recovery tank (2), a second pump body is installed in the delivery pipeline, a third pump body is installed in the recovery pipeline, a check valve is installed in the delivery pipeline and the recovery pipeline, the second pump body delivers paint to the centralized recovery tank (3), and the third pump body delivers paint to the large recovery tank (2), a first liquid level sensor is installed in the small recovery tank (1), a second liquid level sensor is installed in the large recovery tank (2), and a third liquid level sensor is installed in the centralized recovery tank (3); the first liquid level sensor, the second liquid level sensor and the third liquid level sensor are electrically connected to a controller, and the controller can control the start and stop of the first pump body, the second pump body and the third pump body respectively.
2. The waste liquid recovery system according to claim 1, characterized in that: A grid plate (9) is formed on the floor of the spray painting room (4), a small recovery tank (1) is installed on the lower side of the grid plate (9), a large recovery tank (2) is installed on the upper side of the grid plate (9), and the large recovery tank (2) is installed directly above the small recovery tank (1).
3. The waste liquid recovery system according to claim 2, characterized in that: One side of the spray booth (4) is a mechanical spray area (5), and the other side of the spray booth (4) is a hand spray area (6). A small recovery tank (1) is installed between the hand spray area (6) and the mechanical spray area (5). U-shaped grooves (7) are extended on both sides of the small recovery tank (1). The U-shaped grooves (7) are inclined, and the lower end of the U-shaped grooves (7) is connected to the small recovery tank (1).
4. The waste liquid recovery system according to claim 3, characterized in that: The mechanical spraying area (5) is provided with two rows of mechanical nozzle processing areas, the hand spraying area (6) is provided with two rows of hand spraying processing areas, the U-shaped groove (7) corresponds one-to-one to the mechanical nozzle processing areas, and the U-shaped groove (7) also corresponds one-to-one to the hand spraying processing areas.
5. The waste liquid recovery system according to claim 3, characterized in that: A collecting box (8) is installed at the lower end of the U-shaped groove (7), and paint can be collected in the collecting box (8). The small recovery tank (1) is installed at the bottom of the collecting box (8).
6. The waste liquid recovery system according to claim 1, characterized in that: The first pump body, the second pump body and the third pump body are pneumatic diaphragm pumps.
7. A working method of a waste liquid recovery system, characterized in that: The waste liquid recovery system according to claim 4 further comprises the following steps: S1, the paint in the mechanical nozzle processing area and the hand spray processing area drips into the U-shaped groove (7), and the paint is collected in the small recovery tank (1); S2, the first liquid level sensor detects that the paint has reached the upper limit, and the first pump body is turned on, so that the paint flows from the small recovery tank (1) into the large recovery tank (2); S3, the first liquid level sensor detects that the paint has reached the lower limit, and the first pump body is closed; the second liquid sensor detects that the paint has reached the upper limit, and the second pump body is opened, and the paint enters the centralized recovery tank (3), while the third pump body is in a closed state; S4, the second liquid level sensor detects that the paint has reached the lower limit, the second pump body is closed, and the third pump body is opened. If the third liquid level sensor reaches the upper limit, repeat step S3.