Zero-release device and process for wastewater of coal-fired boiler

Abstract

The invention discloses a zero-release device and process for wastewater of a coal-fired boiler. The device comprises a coal-fired boiler, a dust remover and an air pre-heater, wherein the coal-fired boiler, a conveying flue, the air pre-heater, a dust removal flue and the dust remover are sequentially communicated with one another; and an atomizing nozzle is arranged in the conveying flue, and a water pump is arranged outside the conveying flue. The process comprises the following steps: wastewater is pumped by virtue of the water pump, is pressurized, is conveyed to the atomizing nozzle and is sprayed into the conveying flue by virtue of the atomizing nozzle; pollutants in the atomized wastewater are crystallized into solids after moisture is evaporated; and the solid pollutants are captured by the dust remover and are discharged into an ash conveying pipeline, and water vapor is discharged into a subsequent flue by virtue of the dust remover. According to the device and the process, the moisture in the wastewater is completely evaporated into water vapor by virtue of existing equipment and the heat of flue gas, and the pollutants in the wastewater are crystallized into solids after the moisture is evaporated, so that the moisture and the pollutants in the wastewater are completely separated so as to be respectively processed, and the thorough innocent treatment of the wastewater of the boiler is realized.

Description

technical field [0001] The invention specifically relates to a coal-fired boiler waste water zero discharge 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 industry. [0003] The traditional coal-fired boiler wastewater treatm...

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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 wastewater zero discharge 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 be treated

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