Spray evaporation treatment method and system for desulfurization wastewater flue

Abstract

The invention discloses a spray evaporation treatment method and system for a desulfurization wastewater flue. The system comprises a smoke treatment system, a desulfurization wastewater spray evaporation system, a bypass flue system and an automatic control system, wherein the smoke treatment system comprises an air preheater, a flue, a demister, a dust remover, a desulfurization tower and a chimney; the desulfurization wastewater spray evaporation system comprises a settling tank, a water storage tank, a water pump, a heat exchanger and a spraying device; the bypass flue system comprises a bypass flue 1 and a bypass flue 2; the automatic control system comprises an actuator, a smoke acid dew-point instrument and a controller. A smoke inlet is formed in the wall surface of a flue of the desulfurization wastewater spray evaporation system, and an airflow protection layer is formed, so that the corrosion caused due to the splashing of acidic drops to the wall surface is prevented, meanwhile, the turbulence flow degree of a space is increased, and the evaporation is accelerated. The system is easy to process and manufacture, and low in investment cost, and the evaporation efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a treatment method and system for desulfurization waste water flue spray evaporation. Background technique [0002] The emission of flue gas from combustion in petroleum, chemical, electric power, metallurgy, cement, textile and other industries is the chief culprit of haze weather. Due to the pressure of national environmental protection policies, in order to meet the atmospheric environmental protection indicators and avoid environmental protection legal risks, in recent years, the industrial The world attaches great importance to flue gas desulfurization and denitrification technical transformation and device construction. Many provinces and cities have written desulfurization and denitrification into the "Responsibility Statement for Total Emission Reduction of Major Pollutants" of the government and enterprises. However, flue gas desulfurization and denitrification are r...

AI Technical Summary

Problems solved by technology

However, some problems often occur in the actual operation process: corrosion of the dust collector and flue, affecting the safe operation and production of the original equipment of the factory, small processing capacity, etc.

The study found that during the spray evaporation process of desulfurization wastewater, the atomized droplets tend to move to the wall of the flue, resulting in scaling and ash accumulation on the wall of the flue. Soot blowing with steam is required every once in a while, and the acidity of the desulfurization wastewater droplets will decrease. Corrosion to flue wall

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