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Plasma process for purifying coal-burning boiler smoke gas

A coal-fired boiler and flue gas purification technology, which is applied in the direction of separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of high energy consumption and low removal rate

Inactive Publication Date: 2005-06-22
BEIJING STATE GRID POWER TECH
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Problems solved by technology

However, the above-mentioned method still has the problems of high energy consumption and low removal rate (especially the low removal rate of nitrogen oxides)

Method used

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  • Plasma process for purifying coal-burning boiler smoke gas

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Embodiment

[0013] The original flue gas volume of a coal-fired boiler of a 100MW generating set is about 45×10 4 N m 3 / h, after the dust is removed by the dust collector, the temperature of the flue gas is about 150°C, containing SO 2 -2900mg / L, NO X -500mg / L, dust content≤200mg / Nm 3 , exchange heat with the purified flue gas (temperature ≥ 55°C) in the gas-gas heat exchanger (as shown in Figure 1), so that the temperature of the flue gas is reduced to 130-135°C; the flue gas from the top of the spray drying tower (2) The gas distributor enters evenly and mixes with the circulating solution rich in by-products in the subsequent process of atomization to make the flue gas humidify (9%-11%) and cool down (70°C-85°C) in the tower with a diameter of 9.5m and a height of 36m ), to meet the process requirements; at the same time, the by-products are granulated and dried, and the particles with a particle size of ≥50mm (about 70%) flow down the flow, settle in the cone of the tower, and are...

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Abstract

This invention relates to coal-burning boiler smoke new process and device by use of corona discharge and electron beam plasm compound technique, which comprises the following steps: the boiler smoke goes through static dust cleaner and exchanges heat with gag to gas converter; then it goes into frog drying tower for wetting and lowering temperature; then it enters the corona discharge chamber to make oxidation to generate acid substance; the product is mixed with smoke and ammonia injected by liquid ammonia tar and then enters the electronic speeder to generate electronic beam reaction; the generated ammonia sulfate and ammonium nitrate mixed particles are collected in the solution groove.

Description

technical field [0001] The present invention is a method of purifying coal-fired boiler flue gas by using plasma technology, that is, corona discharge and electron beam irradiation in series, and injecting ammonia in the middle, which can efficiently remove SO in flue gas 2 and NO X , making it generate (NH 4 ) 2 SO 3 and NH 4 NO 3 , and be recycled and comprehensively utilized. Background technique [0002] Since the implementation of reform and opening up in our country, the national economy has achieved rapid development. At the same time, my country's energy industry has developed rapidly. However, due to the national conditions of our country, coal is the main energy source, and this situation will be long-term. Burning coal produces a large amount of SO 2 , NO X And volatile organic compounds (VOC), etc., they cause serious pollution to the environment, and restrict the sustainable development of the national economy. For this reason, in recent years, people ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/32
Inventor 张鑫铎何万龄石根徐丽珠
Owner BEIJING STATE GRID POWER TECH
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