Coal-fired boiler bypass flue wastewater evaporation device and technology

Abstract

The invention discloses a coal-fired boiler bypass flue wastewater evaporation device and technology.The device comprises a coal-fired boiler, an air preheater, a dust remover and a wastewater pump station.The dust remover is provided with an ash conveying pipeline and a follow-up flue.The air preheater is communicated with the dust remover through a dust removal flue, the coal-fired boiler is communicated with the air preheater through a denitration device, the denitration device is communicated with the air preheater through a preheating flue, the preheating flue is communicated with the dust removal flue through a bypass flue, an atomizing nozzle is arranged in the bypass flue, the bypass flue is provided with an additional dust remover, the additional dust remover is provided with an additional ash conveying pipeline, and a heat exchanger communicated with the wastewater pump station is arranged on the bypass flue or the preheating flue.The technology comprises preheating, atomizing, evaporating separation and capturing of solid pollutant.According to the coal-fired boiler bypass flue wastewater evaporation device and technology, existing equipment and flue gas heat are sufficiently utilized, moisture in wastewater is evaporated to be steam, pollutant in the wastewater is crystallized to be in a solid state, moisture and pollutant in the wastewater are completely separated, and therefore wastewater of the boiler is thoroughly and harmlessly treated.

Description

technical field [0001] The invention specifically relates to a coal-fired boiler bypass flue wastewater evaporating device and process. 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. A coal-fired boiler is a boiler whose fuel is coal-fired. It refers to thermal power equipment that heats heat medium water or other organic heat carriers (such as heat transfer oil, etc.) to a certain temperature (or pressure) after burning coal in the furnace to release heat. , Coal-fired boilers are the most extensive way to utilize coal. With the continuous strengthening of the country's environmental protection, 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 the coal-fired boiler field. [0003] The traditional coal-fired boiler wastewater t...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, and provide a coal-fired boiler bypass flue wastewater evaporation device and process to solve the problem that the existing coal-fired boiler can only remove part of the pollutant components in the wastewater, and the remaining wastewater cannot Dealing with the problem

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