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Waste recycling and regenerating device used in flue gas purification method

A flue gas purification and regeneration device technology, applied in chemical instruments and methods, separation methods, alkali metal compounds, etc., can solve problems such as high investment and operating costs, difficult operation, and complex processes, so as to save operating costs and avoid Dust leakage, small dosage effect

Active Publication Date: 2015-03-11
CHENGDU HUAXITANG INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the discarding method is to discard the waste slag of the desulfurization reaction in a certain way without recycling. Its main advantages are simple equipment, easy operation, low investment and operating costs, but the waste slag needs to occupy a site for stacking, which is likely to cause secondary pollution; The recovery method is to further process the product of flue gas desulfurization, so that it can be recycled as a by-product, turning harm into profit. However, the process is more complicated, the operation is more difficult, and the investment and operation costs are higher.

Method used

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  • Waste recycling and regenerating device used in flue gas purification method
  • Waste recycling and regenerating device used in flue gas purification method
  • Waste recycling and regenerating device used in flue gas purification method

Examples

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Embodiment 1

[0058] The present invention proposes a device for recovering and regenerating waste in the flue gas purification method, which mainly involves recovering SOx and NOx in the original flue gas to prepare Na 2 SO 4 、NaNO 3 In this example, the original flue gas is firstly processed by flue gas purification equipment to obtain purified gas. SOx and NOx in the original flue gas are captured into desulfurization and denitrification wastewater to form a certain concentration of sodium sulfate, Sodium nitrate mixed solution, that is: desulfurization and denitrification wastewater, and then the Na in the desulfurization and denitrification wastewater is passed through the wastewater regeneration system 2 SO 4 and NaNO 3 After separation, Na 2 SO 4 and NaNO 3 product. The device is easy to operate, not only can remove the pollutants in the original flue gas, reduce environmental pollution, but also obtain Na 2 SO 4 、NaNO 3 The product greatly reduces the cost of air pollutant...

Embodiment 2

[0060] The difference between this embodiment and Example 1 is that the coarse flue gas purification involved in this embodiment is compared with the traditional flue gas purification method, the absorbent is metered and sent to the pulverizer system for crushing, and the pulverized absorbent particles are passed through The dry powder injector is sent into the main flue 1 to mix and react with the raw flue gas. In the traditional method, the purification efficiency of the absorbent to the raw flue gas is usually about 50%, and the desulfurization efficiency is low. In order to improve the absorbent work efficiency, the present embodiment proposes the following design: the original flue gas in the main flue is sent into the absorption tower 4 through the flue gas system, and the improvement of the flue gas system is that the flue gas system is mainly composed of the auxiliary flue 2 and the interconnected auxiliary flue The main flue is composed of 1. At the same time, an impac...

Embodiment 3

[0062] The difference between this embodiment and Embodiment 2 is that in this embodiment, after the original flue gas is split, the volume ratio of the flue gas passing through the main flue 1 and the auxiliary flue gas passing through the auxiliary flue 2 is 9: 1.

[0063] In the actual application process of this embodiment, the original flue gas is sent into the main flue 1 through the flue gas booster fan, and a part of the original flue gas enters the auxiliary flue 2 through the entrance of the auxiliary flue 2, which is called auxiliary flue gas. A part of the original flue gas remains in the main flue 1, which is called flue gas. The auxiliary flue gas drives the absorbent and enters the impact mill crushing classifier together. The absorbent is pretreated in the impact mill crushing classifier and combined with the auxiliary flue gas. reaction, the obtained gas-powder mixture is sent to the main flue 1 through the outlet of the auxiliary flue 2, and then mixed and re...

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Abstract

The invention discloses a waste recycling and regenerating device used in a flue gas purification method. The waste recycling and regenerating device comprises a wastewater regeneration system which is connected with flue gas purification equipment, wherein the flue gas purification equipment is a treatment unit for achieving desulfurization and denitrification of original flue gas; the wastewater regeneration system is a reuse unit which is used for separating the wastewater generated from desulfurization and denitrification by the flue gas purification unit and used for respectively preparing products of Na2SO4 and NaNO3. The waste recycling and regenerating device is simple to operate, pollutants in original flue gas are removed, and environment pollution is reduced, products of Na2SO4 and NaNO3 can be produced, the cost of atmospheric pollutant treatment is greatly lowered, the secondary pollution is avoided, and good social benefits and economic values are achieved.

Description

technical field [0001] The invention relates to a device for recovering and regenerating waste in a flue gas purification method, in particular to the technology for absorbing and regenerating desulfurization and denitrification waste water in the recovered flue gas, and belongs to the field of industrial flue gas reuse. Background technique [0002] The continuous progress of petroleum and chemical industries has not only promoted economic development, but also caused pollution to the environment. At present, the global pollution problem has become increasingly serious, and has attracted widespread attention and attention from all over the world, especially coal-fired power plants. , coal-fired boilers, and waste incineration flue gas emissions, etc., have seriously polluted the atmosphere. We know that coal-fired flue gas contains a large amount of soot, carbon dioxide, SO 2 and NO X Among them, the carbon dioxide emitted by fuel combustion is the main substance that caus...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/81B01D53/60B01D53/64C02F9/10C01D9/06C01D5/00
Inventor 李东林汪然周礼陈洪会郎治曹静
Owner CHENGDU HUAXITANG INVESTMENT
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