Waste emulsified oil low temperature separation system

Abstract

The invention discloses a waste emulsified oil low-temperature separation system, which comprises a stock solution input pipe, a heat exchanger, an evaporator, an oil / water separating device, a condenser and a smell removal device; the evaporator comprises a heating chamber, an evaporating chamber and a steam conveyer pipe; a vapor compressor is arranged on the steam conveyer pipe; the stock solution input pipe passes through the heat exchanger and is connected to the heating chamber of the evaporator; a distilled water conveyer pipe passes through the heat exchanger and is connected to the oil / water separating device; a distilled water output tube and an oil exit pipe are arranged on the oil / water separating device; and the oil exit pipe is connected to the condenser and the smell removal device in order. Based on a purely physical mode, gasification separation can be carried out according to boiling point difference of different liquid, distilled water and a concentrate are separated through pure distillation, usually, distilled water can be taken as industrial water for recycling, the concentrate can be recovered and reused according to different source, zero waste water discharge in industrial enterprises can be realized, the waste emulsified oil low-temperature separation system is convenient for systematization and equipment, so that land occupation area is greatly reduced by comparing with that in a traditional method.

Description

technical field [0001] The invention relates to a low-temperature separation system for waste emulsified oil. Background technique [0002] Oily wastewater is a kind of industrial wastewater, and it is a large discharge of industrial wastewater. Oily wastewater mainly comes from petroleum, petrochemical, steel, coking, gas generation stations, mechanical processing and other industrial sectors, including oilfield wastewater, wastewater from refineries and petrochemical plants, ballast water, tank washing water, engine room water of tankers, Oil tank (tank) car cleaning water, etc. Oily wastewater is the main source of environmental oil pollution, especially marine oil pollution (such as oil pollution). Wastewater from gas plants and coking plants contains coal tar, and waste water from tanneries and food processing plants contains animal and vegetable oils. These also belong to oily wastewater, but the proportion is not large. [0003] Usually oily wastewater treatment te...

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Problems solved by technology

[0016] Due to the limitations of technical means, the existing oily wastewater treatment methods have many limitations in the actual implementation and application process. Neither the flocculation sedimentation method nor the biochemical method can avoid the use of a large number of chemical agents, which leads to high unit treatment costs. cause secondary pollution

In addition, the traditional mechanical filtration method and air flotation treatment equipment are not good for the separation of heavy metal ions and inorganic salts. They must cooperate with other chemical methods for secondary treatment and cause the transfer of pollutant carriers, resulting in secondary pollution and increased treatment. cost

[0017] In addition, most of the traditional processes cannot be equipped with equipment, and the construction of anaerobic and aerobic pools will take up a lot of space and a lot of initial investment and later maintenance costs.

[0018] At the same time, for high-concentration oily industrial wastewater whose COD often exceeds 100,000ml / L, the above treatment technologies often appear to be weak or too expensive to handle.

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