Device for regenerating degreasing agent by separating oil stains from degreasing agent

Abstract

The invention discloses a device for regenerating a degreasing agent by separating oil stains from the degreasing agent. The device comprises a degreasing tank and further comprises a heating tank, a heat exchanger, an oil stain skimming tank and an oil stain collecting box which are arranged at different heights, wherein the heating tank is higher than the heat exchanger; the heat exchanger is higher than the oil stain skimming tank; the oil stain skimming tank is higher than the degreasing tank; the degreasing tank is higher than the oil stain collecting box; a degreasing tank circulating pump, a degreasing filter and a first degreasing and deoiling pipeline control valve used for opening and closing are arranged on a pipeline between the degreasing tank and the heat exchanger; a non-demulsification degreasing agent inlet pipeline and a heating demulsification degreasing agent outlet pipeline are arranged between the heat exchanger and the heating tank; the non-demulsification degreasing agent inlet pipeline is provided with a second degreasing and oil removal pipeline control valve used for adjusting flow; a curve pipeline is arranged between the degreasing tank and the oil skimming tank; and the heat exchanger is connected with the oil skimming tank through a pipeline. According to the invention, a pump body is not independently arranged, the non-demulsified degreasing agent is pumped into the heating tank through the degreasing tank circulating pump, a deoiled clean degreasing agent flows back to the degreasing tank through the gravity of the degreasing agent, and oil dirt flows into the collecting box.

Description

technical field [0001] The invention belongs to the technical field of pretreatment in the automobile painting industry, and in particular relates to a degreasing agent separation oil pollution regeneration device. Background technique [0002] Before the car cab is painted, oil stains are attached to the surface of the steel plate, which needs to be removed with a pre-treatment degreasing agent. With the continuous use of the degreasing agent, the oil on the surface of the steel plate in the cab continues to enter the degreasing agent, causing the oil content in the degreasing agent to increase continuously, and the ability of the degreasing agent to remove oil stains decreases. Therefore, it is necessary to regularly scrap the whole tank of degreasing agent. In view of the above problems, a set of degreasing agent separation and oil pollution regeneration device is designed to separate the oil in the degreasing agent through demulsification, so that the degreasing agent c...

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of the existing heating method to remove oil in the degreasing agent: because the flow rate of the degreasing agent containing oil into the regeneration device is not constant (influenced by pipeline blockage and other reasons), the degreasing liquid level of the regeneration device fluctuates

The heating demulsification temperature control is inaccurate. When the temperature is too high, the surfactant in the degreasing agent will be precipitated, resulting in the failure of the regenerated degreasing agent.

[0005] Disadvantages of the existing ultrafiltration method for removing oil in degreasing agents: there are tiny metal oxides and dust on the surface of steel plates in the automotive coating industry, which will block the pores in the microporous materials. will be invalid

[0006] Disadvantages of the existing adsorption method to remove oil stains in degreasing agents: in the automotive coating industry, the output is high, and the surface of steel plates is more oily.

High replacement cost for oil-wet and impure materials

[0007] For example, the patent CN101653666 provides a kind of heating and demulsification oil-water separation equipment, which is equipped with an oil-water separation device structure 5, which has the following defects: 1. Due to the influence of pipeline blockage and other reasons, the liquid level fluctuates, and the flow rate of the degreasing liquid is small. The surface is lower than the discharge port, and the oil cannot be discharged; when the flow rate of the degreasing agent is large, the liquid level is higher than the oil discharge port, and the degreasing liquid and the oil are discharged into the subsequent stage, which will waste the degreasing agent, so the pump 14 is used to recover the degreasing liquid; 2. It is necessary to frequently adjust the manual valve 1 to control the flow rate; 3. There is no heat exchanger structure; 4. The degreasing liquid is returned to the degreasing tank through the pump 15, which requires the use of multiple pumps, the degreasing tank circulation pump, pump 14 , 15 pumps, 3 in total; 5. The oil and degreasing liquid are separated using an overflow port (structure 5), which cannot completely separate the oil and the degreasing liquid. To remove oil stains, it is necessary to manually open the waste oil discharge pipe through the observation window; 6. Several The tank body is separated but not separated, and a horizontal plane is integrated, but there is a partition in the middle

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