System for treating and recycling cleaning waste liquid and waste emulsified liquid generated by automobile engine production line and method thereof
A technology for automobile engine and waste emulsion, which is applied in the fields of vehicle washing facility wastewater treatment, chemical instruments and methods, special compound water treatment, etc.
Pending Publication Date: 2020-09-15
SHANGHAI YIKE GREEN ENG
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Problems solved by technology
However, for some newly-built mechanical processing enterprises in some industrial parks, the production process contains a certain amount of heavy metals, and heavy metals also exist in the wastewater discharge. According to the requirements of the environmental impact assessment, they cannot be discharged and treated, and the requirements for recycling must be realized.
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Embodiment 1
[0174] A large domestic joint venture automobile engine manufacturing plant built a new engine production line. The production wastewater includes: engine production line wastewater (cleaning wastewater and waste emulsion), cleaning wastewater (shop floor cleaning water, machining cleaning wastewater, laboratory cleaning wastewater equipment and pipeline cleaning wastewater), waste emulsion (including waste emulsion, waste cleaning liquid, tank cleaning water, antifreeze). The output is 4100m3 / a, the main pollutant concentration: CODCr: 6000mg / L~80000mg / L, SS: 1000~8000mg / L, NH3-N: less than 400mg / L, TN: less than 900mg / L, TP: 12~ 15mg / L, petroleum: 150~1000mg / L, conductivity: less than 5300mg / L, the concentration of chromium and nickel and their compounds are 20mg / L. In order to meet the environmental protection requirements of the EIA, the wastewater must be treated with zero discharge to avoid adverse effects on the surrounding environment. The waste water of this producti...
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The invention provides a system for treating and recycling cleaning waste liquid and waste emulsion generated by an automobile engine production line and a method thereof. The system comprises a wasteliquid storage tank, a three-phase separator, an evaporation and concentration device, a two-phase oil-water separator device, a cooling device, a coagulation and air floatation device, a biochemicaldevice, a membrane concentration device, a constant-pressure water supply device, a sterilization device and a filtering device which are in fluid communication in sequence. According to the invention, the cleaning waste liquid and the waste emulsion generated by the automobile engine production line are subjected to deep treatment and are reused as cleaning machine liquid and emulsion dilution make-up water of the automobile engine production line and workshop cleaning water; therefore, recycling is achieved, heavy metal and other waste liquid are prevented from polluting the environment, the purposes of energy conservation and emission reduction are achieved, and the purpose of zero emission is achieved.
Description
technical field [0001] The invention belongs to the field of waste water treatment, and relates to a treatment and reuse system and a treatment and reuse method for cleaning waste liquid and waste emulsion produced by an automobile engine production line. Background technique [0002] In the cleaning waste liquid and waste emulsion waste water produced by the automobile engine production line: the cleaning waste water is mainly the workshop floor cleaning waste water, the material rack cleaning waste water, the filter screen washing waste water, etc.: the main pollutant concentration in the cleaning waste water: CODCr: 6000mg / L, BOD5 : 2000mg / L, SS: 1000mg / L, NH3-N: 60mg / L, TN: 100mg / L, TP: 12mg / L, petroleum: less than 1000mg / L. The waste emulsion is mainly waste emulsion, waste cleaning liquid, waste quenching liquid, cooling liquid, etc. Concentration of main pollutants in waste emulsion: CODCr: 9100~80000mg / L, BOD5: 600mg / L, SS: 8000mg / L, NH3-N: 400mg / L, TN: 900mg / L, TP:...
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Patent Timeline
Login to View More IPC IPC(8): C02F9/14C02F103/44C02F101/30C02F101/20
CPCC02F1/001C02F1/04C02F1/24C02F1/283C02F1/32C02F1/40C02F1/444C02F1/50C02F1/52C02F1/66C02F3/00C02F3/30C02F5/00C02F9/00C02F2101/20C02F2101/30C02F2103/44C02F2305/06
Inventor 杨雷宋伟
Owner SHANGHAI YIKE GREEN ENG