Device and method for degrading high temperature coke quenching waste water

Abstract

The invention discloses a device for degrading high temperature coke quenching waste water. The device comprises a coke quenching circulation pool, a coagulative reaction tank, a coagulative precipitation tank, an advanced catalytic oxidizer and a filter, wherein the coke quenching circulation pool is connected with the coagulative reaction tank; the coagulative reaction tank is connected with thecoagulative precipitation tank, the coagulative precipitation tank is connected with the advanced catalytic oxidizer, and the advanced catalytic oxidizer is connected with the filter. The coke quenching waste water in a high temperature state is sequentially subjected to coke powder precipitation, suspended solid precipitation and catalytic oxidative degradation in a degradation device, and the degraded product is then filtered, so that the coke quenching waste water is enabled to reach the discharge standard of the Coking Chemical Industry Pollutant Discharge Standard. The degradation devicecan be used for degrading the high temperature coke quenching waste water, and is high in degradation efficiency and low in degradation cost, thus having very high use value and promotion value.

Description

technical field [0001] The invention relates to the technical field of coke quenching wastewater treatment in coal chemical industry, in particular to a degradation device and method for high temperature coke quenching wastewater. Background technique [0002] The coke quenching wastewater mainly comes from the high temperature wastewater generated during the water coke quenching process of the coking plant. The coke quenching process is to spray and cool down the red coke at about 1000℃ with water. During the contact process between water and red coke, the substances in the red coke will be washed by water and enter the coke quenching water; at the same time, the coke quenching process is carried out in the open air When water, air and red coke are in contact with each other to cool down, a series of chemical reactions will occur to generate a variety of pollutants into the coke quenching water; in addition, most coking plants use the treated phenol cyanide wastewater as co...

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Problems solved by technology

The ozone catalytic oxidation method has high organic matter removal efficiency, but the equipment investment is high, and the optimal reaction temperature is 50°C, while the quenching water temperature reaches 70-80°C (that is, coke quenching wastewater in a high temperature state), which is much higher than the reaction temperature, so The ozone catalytic oxidation method needs to add a cooling device, and the operating cost is high, which is unbearable for enterprises

The Fenton oxidation method has high organic matter removal efficiency, low equipment investment, and is suitable for the treatment of high-temperature wastewater, but it has high operating costs, large floor area, complex operation, low oxidant utilization rate, high anti-corrosion requirements, and no practical application cases.

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