Flue gas desulfurization and denitrification two-phase continuous absorption system and method

A desulfurization and denitrification, two-phase continuous technology, applied in separation methods, chemical instruments and methods, air quality improvement and other directions, can solve the problems of slow hydrolysis rate, difficult removal, oxidant absorption, etc., achieving simple device structure, low equipment investment, Easy to use effect

Pending Publication Date: 2021-12-31
SHANDONG SHIP TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the absorbent dry powder used in this process contains alkali activators such as calcium hydroxide and calcium oxide, which are easy to block equipment pipes and nozzles, and the reaction by-products are difficult to handle
[0010] In the above examples and the currently published patents, most of them are to oxidize NO in flue gas and X The absorption process is carried out separately, which is due to the NO 2 The hydrolysis rate is slow and cannot be completely absorbed by the oxidant. If NO is not oxidized and NO X The absorption is separated, and after the reaction reaches the saturated absorption of the oxidant, the NO 2 will escape, resulting in NO X Reduced removal rate
In addition, NO 2 intractable problem

Method used

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  • Flue gas desulfurization and denitrification two-phase continuous absorption system and method
  • Flue gas desulfurization and denitrification two-phase continuous absorption system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] In this implementation, the flue gas desulfurization and denitrification two-phase continuous absorption system is an emulsion composed of an aqueous phase oxidant and an organic phase absorbent; the volume ratio of the aqueous phase oxidant to the organic phase absorbent is 6:3; the aqueous phase oxidant is sodium hypochlorite solution The preparation method of water-phase oxidant is: adopt metering pump to carry seawater desalination intercepted liquid to carry out reaction in the sodium hypochlorite generator, the working temperature of sodium hypochlorite generator is 20 ℃, and the sodium hypochlorite solution that reaction makes available chlorine is 10wt%; Will effectively Chlorine is that the sodium hypochlorite solution of 10wt% is diluted into available chlorine and is the sodium hypochlorite solution of 0.5wt%, and adjusts its pH to 6, promptly makes aqueous phase oxidant; Show.

[0033]

[0034] Use the above flue gas desulfurization and denitrification tw...

Embodiment 2

[0036] In this implementation, the flue gas desulfurization and denitrification two-phase continuous absorption system is an emulsion composed of an aqueous phase oxidant and an organic phase absorbent; the volume ratio of the aqueous phase oxidant to the organic phase absorbent is 8:4; the aqueous phase oxidant is sodium hypochlorite solution The preparation method of water-phase oxidant is: adopt metering pump to carry seawater desalination intercepted liquid to carry out reaction in the sodium hypochlorite generator, the working temperature of sodium hypochlorite generator is 40 ℃, and the sodium hypochlorite solution that reaction makes available chlorine is 5wt%; Will effectively The sodium hypochlorite solution that chlorine is 5wt% is diluted into the sodium hypochlorite solution that available chlorine is 1wt%, and adjusts its pH to 8, promptly makes aqueous phase oxidant; Organic phase absorbent is N, N-diphenylacetamide, and its structural formula is as follows: Shown...

Embodiment 3

[0040] In this implementation, the flue gas desulfurization and denitrification two-phase continuous absorption system is an emulsion composed of an aqueous phase oxidant and an organic phase absorbent; the volume ratio of the aqueous phase oxidant to the organic phase absorbent is 4:2; the aqueous phase oxidant is sodium hypochlorite solution The preparation method of water phase oxidant is: adopt metering pump to carry seawater desalination intercepted liquid to carry out reaction in the sodium hypochlorite generator, the working temperature of sodium hypochlorite generator is 25 ℃, and the sodium hypochlorite solution that reaction makes available chlorine is 10wt%; Will effectively Chlorine is that the sodium hypochlorite solution of 10wt% is diluted into available chlorine and is the sodium hypochlorite solution of 2wt%, and adjusts its pH to 7, promptly makes aqueous phase oxidant; Organic phase absorbent is tributylamine, and its structural formula is as shown in structur...

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Abstract

The invention discloses a flue gas desulfurization and denitrification two-phase continuous absorption system and method. The flue gas desulfurization and denitrification two-phase continuous absorption system is an emulsion composed of a water-phase oxidant and an organic-phase absorbent; the volume ratio of the water-phase oxidant to the organic-phase absorbent is (2-8): (2-5). The flue gas desulfurization and denitrification two-phase continuous absorption method adopts the flue gas desulfurization and denitrification two-phase continuous absorption system to perform desulfurization and denitrification on flue gas, firstly, the water phase oxidant and the organic phase absorbent are mixed to form the emulsion, then the flue gas is subjected to dust pre-removal and then is introduced into the emulsion, and NOX and SO2 in the flue gas react with the emulsion. According to the flue gas desulfurization and denitrification two-phase continuous absorption system, on the basis of an existing desulfurization washing tower device, flue gas is introduced into the emulsion formed by mixing the water-phase oxidant and the organic-phase absorbent for reaction, and synchronous desulfurization and denitrification can be completed. Compared with other flue gas desulfurization and denitrification methods, the operation device is simple in structure and equipment investment is low.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment. Specifically, it is a two-phase continuous absorption system and method for flue gas desulfurization and denitrification. Background technique [0002] With the rapid development of the world economy, the demand for fossil fuels in various countries is increasing day by day. At the same time, equipment powered by fossil energy, such as marine ship engines and coal-fired boilers in thermal power plants, will emit a large amount of harmful gases, and the NO contained in the tail gas X and SO 2 Toxic substances such as toxic substances bring great harm to the environment and human health and must be controlled. Among them, NO X and SO 2 Not only is it harmful to the human respiratory system, causing or aggravating respiratory diseases such as emphysema and bronchitis, but it can also cause environmental problems such as acid rain, smog, photochemical smog, and eutrophication of water...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/60
CPCB01D53/78B01D53/60Y02A50/20
Inventor 任秀莲赵俊雄魏琦峰潘雁甲王泓霖许芳
Owner SHANDONG SHIP TECH RES INST
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