High-salinity wastewater low-temperature bypass thermal method concentration decrement and flue evaporation zero discharge system

Abstract

The invention discloses a low-temperature bypass thermal concentration reduction and flue evaporation zero discharge system for high-salinity wastewater. The system comprises an air preheater, a dustremover, a desulfurization absorption tower, a wastewater storage tank, an integrated device, a distribution module and an atomization device, the air preheater is connected with the dust remover through a conveying flue, an induced draft fan is arranged at an outlet of the dust remover, the wastewater storage tank is connected with a low-temperature flue gas concentration unit, the low-temperature flue gas concentration unit is bypassed from the induced draft fan to the desulfurizing absorption tower, the flue is newly arranged behind the air preheater and in front of the dust remover, the flue and the original flue are used in a standby mode, when the flue for waste water evaporation is corroded or scaled, the current flue is shut down, the flue on the other side is opened, and normal operation of the boiler is not affected. The process flow is clear, cost-saving, safe and stable, and actual zero discharge of wastewater is realized.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a high-salt wastewater low-temperature bypass thermal method concentration reduction and flue evaporation zero-emission system. Background technique [0002] my country's energy is characterized by poor oil, little gas, and rich coal. Coal has always accounted for more than 70% of the country's energy output. Coal-fired boilers are the most widely used method of coal utilization. With the continuous strengthening of environmental protection in the country, all kinds of wastewater generated by coal-fired boilers need to gradually achieve zero discharge, which poses a severe challenge to the sustainable development of coal-fired boilers. . [0003] The traditional coal-fired boiler wastewater treatment process adopts the method of chemical dosing and physical sedimentation. This method has a complicated process, high operation and maintenance costs, and can only remov...

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Problems solved by technology

[0003] The traditional coal-fired boiler wastewater treatment process adopts the method of chemical dosing and physical sedimentation. This method has a complicated process, high operation and maintenance costs, and can only remove part of the pollutants in the wastewater. The treated wastewater cannot be treated. Secondary use, so a large amount of waste water will have nowhere to be used and discharged

Especially the wastewater with high salt concentration not only causes waste of resources, but also pollutes the environment

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