A gravity degreasing and oil removal device suitable for automotive painting workshops

Abstract

This utility model proposes a gravity-based degreasing and oil removal device suitable for automotive painting workshops, relating to the field of degreasing and oil removal painting process technology. It includes: a degreasing tank assembly, a primary skimmer, an electric control valve assembly, a stationary tank, a clear liquid return pump, a secondary skimmer, a screw pump, and an oil-water separation tank. The primary skimmer is movably connected within the degreasing tank assembly. The electric control valve assembly is connected to the stationary tank via a pipeline below the primary skimmer. The electric control valve assembly is connected to the stationary tank via a pipeline. The secondary skimmer is bolted and fixed inside the stationary tank. A water inlet pipeline is provided on one side of the stationary tank. The bottom of the stationary tank is connected to the degreasing tank assembly via a pipeline through the clear liquid return pump. The secondary skimmer is connected to the oil-water separation tank via a pipeline through the screw pump. The oil-water separation tank is connected to the stationary tank via a pipeline. The degreasing oil-containing tank liquid is not heated, reducing damage from heating the degreasing agent, reducing heat consumption of the heated tank liquid, and saving energy.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical conveying, and specifically relates to a gravity oil removal device for degreasing in an automobile painting workshop. This technology is applicable to the separation of grease in the inner tank liquid of the degreasing process tank generated during the automobile manufacturing process. Through the collaborative action of multiple oil removal units, the grease in the degreasing tank liquid can be effectively treated. Background Technique

[0002] The degreasing process in the painting workshop is the core link of the pretreatment electrophoresis process. Its operating principle focuses on removing oil stains, rust-proof wax, and particulate impurities on the metal surface of the vehicle body to ensure the adhesion of subsequent phosphating, electrophoresis and other processes.

[0003] In the field of pretreatment electrophoresis in the painting workshop, in order to save costs and reduce the discharge frequency of the degreasing tank liquid; to adapt to the diversified trend of the non-emulsifying and low-temperature requirements of degreasing agents. For the pretreatment production line that uses low-temperature non-emulsifying degreasing agents in the project, the current pretreatment degreasing and oil removal in the automobile painting workshop mostly adopts the "high-temperature demulsification" treatment process. This production line has the following problems:

[0004] 1. It is necessary to heat the tank liquid to above 70°C, which consumes heat and increases energy consumption; 2. It cannot meet the low-temperature degreasing agent. After the low-temperature degreasing agent is heated to 60°C, the active ingredients are reduced or destroyed by heat, increasing the dosage of the agent and increasing the cost; 3. The existing high-temperature demulsification technology has high energy consumption and poor operating economy for new low-temperature agents and other technical problems.

[0005] Therefore, it is urgent to develop a gravity oil removal device for degreasing in an automobile painting workshop to solve the above problems. Content of the Utility Model

[0006] The utility model is a gravity oil removal device for degreasing in an automobile painting workshop. The utility model is optimized and designed according to the characteristics of the degreasing agent being non-emulsifying and having low-temperature requirements, integrating process modules such as degreasing tank skimmers, control valve groups, and gravity separation after standing, ensuring the treatment efficiency under different process conditions, meeting the oil content requirements under process conditions, and being applicable to the renovation and new construction projects of degreasing and oil removal facilities supporting the painting production line of automobile manufacturing enterprises, solving the above technical problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a gravity-based degreasing and oil removal device suitable for automotive painting workshops, comprising: a degreasing tank assembly, a primary skimmer, an electric control valve assembly, a stationary tank, a clear liquid return pump, a secondary skimmer, a screw pump, and an oil-water separation tank. The primary skimmer is movably connected within the degreasing tank assembly. The electric control valve assembly is connected to the lower part of the primary skimmer via a pipeline. The electric control valve assembly is connected to the stationary tank via a pipeline. The secondary skimmer is bolted and fixed inside the stationary tank. A water inlet pipeline is provided on one side of the stationary tank. The bottom of the stationary tank is connected to the degreasing tank assembly via a pipeline through the clear liquid return pump. The secondary skimmer is connected to the oil-water separation tank via a pipeline through the screw pump. The oil-water separation tank is connected to the stationary tank via a pipeline.

[0008] Preferably, the degreasing tank group includes a primary filter tank, a pre-degreasing tank, and a re-degreasing tank. The primary filter tank, the pre-degreasing tank, and the re-degreasing tank are connected by pipelines. Each of the primary filter tank, the pre-degreasing tank, and the re-degreasing tank is equipped with a primary oil skimmer. A normally open solenoid valve is provided between the pipeline connecting the primary oil skimmer and the electric control valve group.

[0009] Preferably, the electric control valve group is provided with a clamp butterfly valve and a pneumatic valve, the clamp butterfly valve and the pneumatic valve are connected in series, and the electric control valve group is opened and closed at regular intervals.

[0010] Preferably, a partition is provided on the right side of the static tank, the upper part of the partition is fixedly connected to the static tank, the lower part of the partition is kept at a distance from the static tank, a liquid level sensor is provided at the upper part of the static tank, a sewage treatment pipe is provided at the lower end of the static tank, the sewage treatment pipe is bolted and fixed to the static tank, the sewage treatment pipe is provided with a clamp butterfly valve, and a liquid level sensor is provided at the lower end of the static tank.

[0011] Preferably, the first liquid level sensor is electrically connected to the electric control valve assembly, and the second liquid level sensor is electrically connected to the clear liquid return pump.

[0012] Preferably, the front and rear ends of the clear liquid return pump are connected to the pipeline using flexible joints. A pressure gauge and a pipeline pressure sensor are provided at the rear end of the pipeline where the clear liquid return pump is located. A check valve and a clamp butterfly valve are provided at the rear end of the pipeline where the clear liquid return pump is located.

[0013] Preferably, the front end of the screw pump is bolted to the secondary skimmer via a pipeline, and a pressure gauge and a pipeline pressure sensor are provided at the rear end of the pipeline where the screw pump is located. A check valve and a clamp butterfly valve are provided at the rear end of the pipeline where the screw pump is located, and the screw pump is opened intermittently.

[0014] Beneficial effects

[0015] This invention provides a gravity-based degreasing and oil removal device suitable for automotive painting workshops, which has the following advantages compared with existing technologies:

[0016] This invention collects the floating oil accumulated on the surface of the degreasing tank group through a primary skimmer. The oily liquid in the tank is controlled to enter the settling tank by a timed electric valve to achieve primary separation. The oily liquid in the tank group is allowed to stand for more than 60 minutes to achieve the grease floating and stratification. The lower clear liquid is returned to the degreasing tank group by a return pump. The grease on the surface of the settling tank is pumped into the oil-water separation tank by a screw pump to finally achieve the separation of grease and clear liquid. The finally separated clear liquid is introduced into the settling tank, and the grease is collected by an oil collecting cylinder to achieve secondary separation.

[0017] This invention enables the recycling of the cleaning solution, effectively reducing wastewater discharge. This invention proposes that the degreasing oil-containing tank solution is not heated, reducing damage caused by heating the degreasing agent, reducing the heat energy consumption of the heated tank solution, and saving energy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the layout of this utility model;

[0020] Figure 2 This is a diagram showing the connection state of the degreasing tank of this utility model;

[0021] Figure 3 This is a schematic diagram of the connection of the clear liquid return pump of this utility model;

[0022] Figure 4 This is a schematic diagram of the control panel of this utility model;

[0023] Figure 5 This is a flowchart illustrating the process of this utility model.

[0024] In the picture:

[0025] 1. Degreasing tank assembly; 2. Primary skimmer; 3. Electric control valve assembly; 4. Static tank; 5. Clear liquid return pump; 6. Secondary skimmer; 7. Screw pump; 8. Oil-water separator; 9. Oil collection cylinder; 10. Clamping butterfly valve; 11. Check valve; 12. Ball valve; 13. Level sensor one; 14. Level sensor two; 15. Pressure gauge; 16. Pipeline pressure sensor one; 17. Pipeline pressure sensor two. Detailed Implementation

[0026] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. The technical solutions of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0027] Please see Figure 1-5 This utility model provides a technical solution:

[0028] A gravity-based degreasing and oil removal device suitable for automotive painting workshops includes: a degreasing tank assembly 1, a primary skimmer 2, an electric control valve assembly 3, a stationary tank 4, a clear liquid return pump 5, a secondary skimmer 6, a screw pump 7, and an oil-water separation tank 8. The primary skimmer 2 is movably connected inside the degreasing tank assembly 1. The electric control valve assembly 3 is connected to the lower part of the primary skimmer 2 via a pipeline. The electric control valve assembly 3 is connected to the stationary tank 4 via a pipeline. The secondary skimmer 6 is bolted and fixed to the upper part of the inner side of the stationary tank 4. A water inlet pipeline is provided on one side of the stationary tank 4. The bottom of the stationary tank 4 is connected to the degreasing tank assembly 1 via a pipeline through the clear liquid return pump 5. The secondary skimmer 6 is connected to the oil-water separation tank 8 via a pipeline through the screw pump 7. The oil-water separation tank 8 is connected to the stationary tank 4 via a pipeline.

[0029] In some embodiments, the degreasing tank group 1 consists of a primary filter tank, a pre-degreasing tank, and a re-degreasing tank from left to right. The primary filter tank, the pre-degreasing tank, and the re-degreasing tank are connected by pipelines. Each of the primary filter tank, the pre-degreasing tank, and the re-degreasing tank is equipped with a primary oil skimmer 2. A normally open solenoid valve is provided between the pipeline connecting the primary oil skimmer 2 and the electric control valve group 3.

[0030] In some embodiments, the oil-containing liquid in the degreasing tank group 1 is controlled by a primary skimmer 2 and an electric control valve group 3 at regular intervals to ensure that it enters the static tank 4, thus ensuring that the time for the oil to accumulate on the surface of the degreasing tank and for the oil-containing liquid to enter the static tank 4 is controllable.

[0031] In some embodiments, the electric control valve group 3 is provided with a clamp butterfly valve 10 and a pneumatic valve, the clamp butterfly valve 10 and the pneumatic valve are connected in series, and the electric control valve group 3 is opened and closed at regular intervals.

[0032] In some embodiments, two partitions are provided on the right side of the static tank 4. The upper part of the two partitions is fixedly connected to the static tank 4, and the lower part of the two partitions is kept at a certain distance from the static tank 4 to facilitate the flow of the lower layer of clear liquid at the bottom of the static tank 4. A liquid level sensor 13 is provided on the upper part of the static tank 4 to monitor the liquid level in the static tank 4 in real time. The liquid level sensor 13 is electrically connected to the electric control valve group 3. When the liquid level sensor 13 detects that the liquid level in the static tank 4 is high, it controls the electric control valve group to close and stop the liquid supply to the static tank 4. A sewage treatment pipe is provided at the lower end of the static tank 4. The sewage treatment pipe is bolted and fixed to the static tank 4. The sewage treatment pipe is equipped with a clamp butterfly valve 10. When the static tank 4 needs to be cleaned and drained, the clamp butterfly valve 10 is opened to drain the sewage in the static tank 4.

[0033] A level sensor 2 14 is installed at the lower end of the static tank 4. The level sensor 2 14 is electrically connected to the clear liquid return pump 5. When the level sensor 2 14 detects that the liquid level in the static tank 4 is high, the level sensor controls the clear liquid return pump 5 to operate, transporting the clear liquid in the static tank 4 to the degreasing tank group 1. When the level sensor 2 14 detects that the liquid level in the static tank 4 is low, the level sensor controls the clear liquid return pump 5 to stop. The oil-containing degreasing tank liquid in the static tank 4 achieves oil-liquid separation after settling, ensuring that the oil-containing degreasing liquid can complete the oil-liquid separation.

[0034] In some embodiments, the front and rear ends of the clear liquid return pump 5 are connected to the pipeline using flexible joints. A pressure gauge 15 and a pipeline pressure sensor 16 are provided at the rear end of the pipeline where the clear liquid return pump 5 is located. When the pipeline pressure sensor 16 detects that the pressure in the pipeline exceeds a preset threshold, it controls the clear liquid return pump 5 to start, introduces the tank liquid into the degreasing tank group 1, and issues an alarm to remind the operator to inspect the equipment. When the pipeline pressure sensor 16 detects that the pressure in the pipeline is lower than the preset threshold, it stops the operation of the clear liquid return pump 5 to prevent the clear liquid return pump 5 from running dry and damaging the clear liquid return pump 5. A ball valve 12 is provided at the front end of the clear liquid return pump 5, and a check valve 11 and a clamp butterfly valve 10 are provided at the rear end of the pipeline where the clear liquid return pump 5 is located. The clear liquid return pump 5 guides the lower layer of clear liquid in the static chamber to re-enter the re-degreasing tank to realize the recycling of clear liquid.

[0035] In some embodiments, the front end of the screw pump 7 is bolted to the secondary skimmer 6 via a pipeline. A pressure gauge 15 and a pipeline pressure sensor 17 are provided at the rear end of the pipeline where the screw pump 7 is located. A check valve 11 and a clamp butterfly valve 10 are provided at the front end of the pipeline where the screw pump 7 is located. The screw pump 7 is opened intermittently. The oil in the static tank 4 collected by the secondary skimmer 6 enters the oil-water separation tank 8 through the screw pump 7. After passing through the oil-water separation tank 8, the oil is collected into the oil collection cylinder 9. A small amount of clear liquid after separation returns to the static tank 4. When the pipeline pressure sensor 17 detects that the pressure in the pipeline exceeds a preset threshold, the screw pump 7 is started to introduce the tank liquid into the oil-water separation tank 8. When the pipeline pressure sensor 17 detects that the pressure in the pipeline is lower than the preset threshold, the screw pump 7 is stopped to prevent the screw pump 7 from running dry and damaging the screw pump 7.

[0036] In some embodiments, the oil-water separation tank 8 has an internal separation structure. The mixture to be separated passes through the separation structure of the oil-water separation tank 8, and the oil in the degreasing liquid is separated by gravity. The oil-water separation tank 8 is not equipped with heating or other devices, and can achieve energy saving while fulfilling the process requirements of degreasing and oil removal.

[0037] In some embodiments, the degreasing oil bath is not heated, which reduces the damage caused by heating the degreasing agent, reduces the heat energy consumption of the heated bath, and saves energy.

[0038] In some embodiments, depending on different production capacities, one or more sets can be set up to achieve oil removal in each process tank. Alternatively, depending on the area occupied, the volume of the static tank 4 can be expanded to complete the pretreatment degreasing process.

[0039] In some embodiments, the present invention collects the floating oil accumulated on the surface of the degreasing tank group 1 through the primary oil skimmer 2, and controls the oily tank liquid to enter the stilling tank 4 through the timed electric valve to achieve primary separation. When the oily tank liquid is left to stand for more than 60 minutes, the grease floats to the surface and separates into layers. The lower clear liquid is pumped back to the degreasing tank group 1 by the return pump. The grease on the surface of the stilling tank 4 is pumped into the oil-water separation tank 8 by the screw pump 7, and finally the grease and clear liquid are separated. The finally separated clear liquid is introduced into the stilling tank 4, and the grease is collected by the oil collecting cylinder 9 to achieve secondary separation.

[0040] Example 1

[0041] In this invention, a primary oil skimmer 2 is installed inside the degreasing tank assembly 1. The oil on the surface of the degreasing tank assembly 1 is collected by the primary oil skimmer 2. The electric control valve assembly 3 is opened periodically, and the oily degreasing liquid enters the static tank 4. The liquid remains in the static tank 4 for about 60 minutes, achieving preliminary oil-water separation. The clear liquid at the bottom is pumped back to the degreasing tank assembly 1 by the clear liquid return pump 5. The operation and stop of the clear liquid return pump 5 are controlled by the liquid level sensor 14. A secondary oil skimmer 6 is installed inside the static tank 4 and connected to the suction port of the screw pump 7. The screw pump 7 is started every 40 minutes and runs for 10 minutes to transport the grease on the surface of the static tank 4 to the oil-water separation tank 8. The final grease separation is completed in the oil-water separation tank 8. After separation, the grease is discharged into the oil collection cylinder 9, and the clear liquid is returned to the static tank 4.

[0042] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. For those skilled in the art to which the present invention pertains, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered as falling within the scope of patent protection determined by the submitted claims.

Claims

1. A degreasing gravity oil removal device suitable for use in an automotive finishing plant, characterized in that: include: The system comprises a degreasing tank assembly, a primary oil skimmer, an electrically controlled valve assembly, a settling tank, a clear liquid return pump, a secondary oil skimmer, a screw pump, and an oil-water separator. The primary oil skimmer is movably connected within the degreasing tank assembly. The electrically controlled valve assembly is connected to the settling tank via a pipeline below the primary oil skimmer. The electrically controlled valve assembly is connected to the settling tank via a pipeline. The secondary oil skimmer is bolted and fixed inside the settling tank. A water inlet pipeline is provided on one side of the settling tank. The bottom of the settling tank is connected to the degreasing tank assembly via a pipeline through the clear liquid return pump. The secondary oil skimmer is connected to the oil-water separator via a pipeline through the screw pump. The oil-water separator is connected to the settling tank via a pipeline.

2. A degreasing gravity oil removal device suitable for automobile painting plant according to claim 1, characterized in that: The degreasing tank group includes a primary filter tank, a pre-degreasing tank, and a re-degreasing tank. The primary filter tank, the pre-degreasing tank, and the re-degreasing tank are connected by pipelines. Each of the primary filter tank, the pre-degreasing tank, and the re-degreasing tank is equipped with a primary oil skimmer. A normally open solenoid valve is installed between the pipeline connecting the primary oil skimmer and the electric control valve group.

3. A degreasing gravity oil removal device suitable for use in an automotive painting plant according to claim 2, characterized in that: The electrically controlled valve assembly includes a clamp butterfly valve and a pneumatic valve, which are connected in series. The electrically controlled valve assembly is opened and closed at regular intervals.

4. The degreasing gravity oil removal device suitable for automobile painting plant of claim 3, characterized in that: A partition is provided on the right side of the static tank. The upper part of the partition is fixedly connected to the static tank, and the lower part of the partition is kept at a distance from the static tank. A liquid level sensor is provided at the upper part of the static tank, and a sewage treatment pipe is provided at the lower end of the static tank. The sewage treatment pipe is bolted and fixed to the static tank. The sewage treatment pipe is equipped with a clamp butterfly valve, and a liquid level sensor is provided at the lower end of the static tank.

5. A degreasing gravity oil removal device suitable for use in an automotive painting plant according to claim 4, characterized in that: The first liquid level sensor is electrically connected to the electric control valve assembly, and the second liquid level sensor is electrically connected to the clear liquid return pump.

6. A degreasing gravity oil removal device suitable for use in an automotive painting plant according to claim 5, characterized in that: The front and rear ends of the clear liquid return pump are connected to the pipeline using flexible joints. A pressure gauge and a pipeline pressure sensor are installed at the rear end of the pipeline where the clear liquid return pump is located. A check valve and a clamp butterfly valve are also installed at the rear end of the pipeline where the clear liquid return pump is located.

7. A degreasing gravity oil removal device suitable for use in an automotive painting plant according to claim 6, characterized in that: The front end of the screw pump is bolted to the secondary skimmer via a pipeline. A pressure gauge and a pipeline pressure sensor are installed at the rear end of the pipeline where the screw pump is located. A check valve and a clamp butterfly valve are installed at the rear end of the pipeline where the screw pump is located. The screw pump is opened intermittently.

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