Wet ammonia flue gas desulphurization product drying, cooling and conveying linkage process and equipment

Abstract

The invention discloses a wet ammonia flue gas desulphurization product drying, cooling and conveying linkage process and wet ammonia flue gas desulphurization product drying, cooling and conveying linkage equipment. The process comprises the following steps of: injecting ammonium sulfate slurry with the water content of about 50 percent into a front flue drying device to make fog drops of the ammonium sulfate slurry and hot flue gas fully mixed in a differential mode and undergo violent heat exchange so as to form dry ammonium sulfate particles with the water content of less than 1 percent; and separating the dry ammonium sulfate particles from hot humid airflow by adopting an air-solid separation device, and cooling to below 40 DEG C in a fluidized chute conveyor device. The equipment comprises the front flue drying device, the air-solid separation device and the fluidized chute conveyor device, wherein the front flue drying device mainly comprises a vertical flue and a anti-blockage spray gun arranged on the lower part of the vertical flue; and the anti-blockage spray gun is connected with a cyclone separator through a slurry delivery pump. The process and the equipment have the characteristics of simple structure, low energy consumption of production and low running cost, and can control the water content and temperature of the ammonium sulfate particles in a range allowedby a packaging process.

Description

technical field [0001] The invention relates to the deep processing of wet-type ammonia flue gas desulfurization products, and specifically refers to a wet-type ammonia flue gas desulfurization product drying, cooling and conveying linkage process and its equipment. Background technique [0002] Compared with the current mainstream limestone / lime-gypsum wet flue gas desulfurization technology, wet ammonia flue gas desulfurization technology has the advantages of strong absorbent alkalinity, fast desulfurization reaction rate, high utilization rate of absorbent, simple process system, and small initial investment , does not produce the greenhouse gas carbon dioxide CO 2 However, the price of the absorbent ammonia used in the wet ammonia flue gas desulfurization technology is much higher than that of limestone or lime, which makes it at a disadvantage in terms of absorbent cost compared with the limestone / lime-gypsum wet flue gas desulfurization technology. If the desulfuriza...

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Problems solved by technology

The patent documents disclosed above mainly involve technologies such as oxidation, crystallization, primary dehydration and drying of desulfurization products, but do not specifically mention or specifically introduce the deep drying treatment process for the final product of desulfurization, ammonium sulfate.

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