Whole plant waste water zero-discharge system

Abstract

The invention discloses a system for zero discharge of waste water in the whole plant, comprising a waste water collection device (1) for collecting waste water in the whole plant, a flue gas wet desulfurization device (2) and a desulfurization waste water zero discharge device (3). The discharge pipe of the device (1) is connected to the flue gas wet desulfurization device (2) through a pipeline, and the liquid discharge pipe of the flue gas wet desulfurization device (2) used to discharge the desulfurization wastewater is connected to the desulfurization wastewater zero through the pipeline. discharge device (3). The beneficial effects of the present invention are: using the high-temperature flue gas in the flue gas wet desulfurization device to evaporate and reduce the original large amount of wastewater, so as to realize the heat utilization of the waste high-temperature flue gas and reduce the amount of wastewater treated by the zero-emission device, As a result, the land occupation, investment and operating costs of the desulfurization wastewater zero discharge device are all low.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a zero discharge system suitable for treating waste water in thermal power plants, industrial kilns and other enterprises. Background technique [0002] Thermal power plants, industrial kilns and other enterprises that use boilers discharge various waste water such as circulating water sewage, industrial waste water, coal-containing waste water, oily waste water, and domestic waste water. Discontinuous large-flow drainage, especially some high-salt wastewater is difficult to treat. At the same time, the realization of zero discharge of large-volume wastewater requires a large equipment footprint, high equipment investment and operating costs. [0003] Enterprises using boilers such as thermal power plants and industrial kilns have built flue gas desulfurization devices under the domestic "Eleventh Five-Year" environmental protection requirements, of which wet flue g...

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Problems solved by technology

[0002] Enterprises using boilers such as thermal power plants and industrial kilns discharge various types of wastewater such as circulating water sewage, industrial wastewater, coal-containing wastewater, oil-containing wastewater, and domestic wastewater. Discontinuous large-flow drainage, especially the treatment of some high-salt wastewater is difficult, and at the same time, the realization of zero discharge of large-volume wastewater requires a large equipment footprint, high equipment investment and operating costs

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