Two-tower ammonia method desulfurization device and method

Abstract

The invention discloses a two-tower ammonia method desulfurization device and method. A smoke purifying part of the device comprises a desulfurization tower and a pre-scrubbing tower, the lower section inside the desulfurization tower is provided with a desulfurization tower slurry pool, the upper section inside the desulfurization tower is provided with a desulfurization tower spraying layer and a desulfurization tower mist eliminator, the lower section inside the pre-scrubbing tower is provided with a pre-scrubbing tower slurry pool, and the upper section inside the pre-scrubbing tower is provided with a pre-scrubbing tower spraying layer and a pre-scrubbing tower mist eliminator; an absorbing agent supply part comprises a liquid ammonia storage tank, an ammonia supply device and an oxidization fan; and an ammonium sulfate dewatering part comprises an ammonium sulfate slurry discharge valve, a neutralization tank, an ammonium sulfate slurry pump, a swirler, a centrifugal machine and a drying bed. The ammonia method desulfurization device comprises the two towers, system heat source can be effectively utilized through the pre-scrubbing tower, slurry is heated through high-temperature raw smoke so that the purpose of concentration is achieved, and smoke can be primarily purified through circulation of the slurry in the two towers, the emission of aerosol is further reduced, side products with considerable economic benefit can be produced while desulfurization efficiency is ensured, and wastes are changed into valuable, and requirements on circular economy is met.

Description

technical field [0001] The invention relates to the technical field of ammonia flue gas desulfurization, in particular to an ammonia flue gas desulfurization device and a flue gas desulfurization method. Background technique [0002] Power plants and industrial boilers typically run on fossil fuels such as coal and oil. Because these fossil fuels generally contain sulfur components, harmful substances such as sulfur dioxide will be produced during the combustion process. Ammonia desulfurization is a new type of desulfurization technology, which uses ammonia (liquid ammonia, ammonia water) as an absorbent. Due to the high activity of ammonia, it can ensure high desulfurization efficiency; the by-product of ammonia desulfurization is ammonium sulfate (fertilizer), which has Higher economic benefit is a process that meets the requirements of circular economy and sustainable development. [0003] The ammonia desulfurization device is mainly composed of three major systems: abs...

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Problems solved by technology

[0004] The invention provides a double-tower ammonia desulfurization device and method to solve the technical problems of poor flue gas purification effect, low ammonium sulfate crystal output and high energy consumption in the existing ammonia desulfurization technology

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