Zero-water-consumption zero-wastewater-draining desulfurization system and application

Abstract

The invention relates to a zero-water-consumption zero-wastewater-draining desulfurization system. The system comprises a boiler air preheater, a low-temperature heat exchange device, a desulfurization wastewater atomization device, a dry type electric dust removal device, a boiler induced draft fan, a desulfurization absorption tower, a smoke condensation mist removing device and a chimney which are sequentially connected. The system further comprises a condensation water tank which is connected with the smoke condensation mist removing device. According to the desulfurization system, the low-temperature heat exchange device, the desulfurization wastewater atomization device, the smoke condensation mist removing device, a water resource recycling device and the like are additionally arranged on a traditional boiler tail smoke purification system, so that circular utilization of process water of the wet method desulfurization system is achieved, and zero consumption of the process water and zero emission of wastewater of the whole desulfurization system are achieved; in addition, the zero-water-consumption zero-wastewater-draining desulfurization system is convenient to operate, the running cost of equipment is reduced, failures are not prone to happening, and the system can be widely applied to desulfurization of wet method smoke.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a desulfurization system of a flue gas purifier after a boiler, in particular to a desulfurization system with zero water consumption and zero waste water discharge and its application. Background technique [0002] In the field of flue gas desulfurization for air pollutant control, the wet desulfurization process has the characteristics of high desulfurization efficiency and strong adaptability to coal types, and is a technology commonly used in thermal power plants. However, there are also difficult problems such as high water consumption, high energy consumption of desulfurization wastewater, and high investment in this process. The flue gas temperature at the inlet of the desulfurization system is generally 110°C-160°C, and the outlet temperature of the desulfurization system is generally around 50°C. The large consumption of evaporated water is the most promin...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a desulfurization system with zero water consumption and zero waste water discharge. problem, the desulfurization system can be applied to the desulfurization of wet flue gas

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