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Chemical agent for purifying gaseous HC1 at high temperature as well as preparation method and application thereof

A chemical agent and gaseous technology, which is applied to the chemical agent for purifying gaseous HC1 at high temperature and its preparation and application fields, can solve the problems of increasing the humidity of flue gas, serious secondary pollution, corroding downstream equipment, etc., and achieves a simple and efficient equipment structure. Removal, easy-to-run effect

Inactive Publication Date: 2010-09-01
刘阳生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wet scrubbing produces a large amount of acidic wastewater, serious secondary pollution, and will greatly reduce the temperature of the flue gas, while greatly increasing the humidity of the flue gas, corroding downstream equipment; dry or semi-dry alkaline chemicals (such as lime, limestone, hydroxide Sodium, etc.) injection is only suitable for the removal of acid gases in medium and low temperature (≤400°C) environments, and is not suitable for the removal of HCl in high temperature environments

Method used

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  • Chemical agent for purifying gaseous HC1 at high temperature as well as preparation method and application thereof
  • Chemical agent for purifying gaseous HC1 at high temperature as well as preparation method and application thereof
  • Chemical agent for purifying gaseous HC1 at high temperature as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Using alumina, silicon oxide and lime as raw materials, the weight ratio of raw materials is 2:1:1, through chemical reaction, calcined at 800°C for 2 hours, and cooled to room temperature to prepare Ca x al y Si z o w h v Powder, wherein x=1~3; y=1~4; z=3~6; w=6~14; v=8~12.

Embodiment 2

[0022] Using alumina, silicon oxide and lime as raw materials, the weight ratio of raw materials is 2:1:1, through chemical reaction, calcined at 200°C for 5 hours, cooled to room temperature, to prepare Ca x al y Si z o w h v Powder, wherein x=1~3; y=1~4; z=3~6; w=6~14; v=8~12.

Embodiment 3

[0024] Select Ca-enriched x al y Si z o w h v The industrial mineral grossular garnet.

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Abstract

The invention discloses a chemical agent for purifying gaseous HC1 at high temperature as well as a preparation method and application thereof. The chemical agent is a Ca-Al-Si reactant, and the molecular formula of the Ca-Al-Si reactant is CaxAlySizOwHv, wherein x is equal to 1-3, y is equal to 1-4, z is equal to 3-6, w is equal to 6-14, and v is equal to 8-12. The preparation method comprises the following steps of: by using alumina, silicon and lime as raw materials, preparing CaxAlySizOwHv powder through chemical reaction or selecting industrial minerals rich in CaxAlySizOwHv. The chemical agent is applied to removing HC1 gas in high-temperature flue gas of 400-950 DEG C and has the efficiency of 90%-99%, thereby being capable of effectively purifying the gaseous HC1 at the high temperature of 400-950 DEG C.

Description

technical field [0001] The invention relates to a chemical agent for purifying gaseous HCl at high temperature, a preparation method and application thereof. Background technique [0002] In coal combustion, solid waste combustion and other fields, the presence of HCl in high-temperature flue gas will greatly increase the corrosion of boiler tubes, so how to efficiently remove HCl gas in flue gas under high temperature conditions has become a key factor to protect the boiler one. [0003] At present, the well-known HCl gas purification technology in flue gas at home and abroad mainly adopts wet scrubbing, dry or semi-dry alkaline chemical removal and other methods. Wet scrubbing produces a large amount of acidic wastewater, serious secondary pollution, and will greatly reduce the temperature of the flue gas, while greatly increasing the humidity of the flue gas, corroding downstream equipment; dry or semi-dry alkaline chemicals (such as lime, limestone, hydroxide Sodium, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/82B01D53/68
Inventor 刘阳生李雅琼
Owner 刘阳生
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