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Method for gas-phase desulfurization of glue gas

A flue gas and gas phase technology is applied in the field of flue gas gas phase desulfurization and the use of high-efficiency desulfurizers for flue gas gas phase desulfurization, which can solve the problems of complex operation, high operation and maintenance costs, and high investment in fixed assets.

Active Publication Date: 2015-07-15
SHANDONG UNIV
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  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the existing desulfurization technology, the present invention provides a method for gas-phase desulfurization of flue gas, which realizes SO in coal-fired flue gas 2 In order to overcome the problems of high investment in fixed assets, high operation and maintenance costs, and complicated operation of the existing desulfurization technology

Method used

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Examples

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specific Embodiment approach

[0028] The technical solutions of the present invention will be further described below in conjunction with the examples, but the protection scope of the present invention is not limited thereto.

[0029] The flue gas to be treated described in the embodiment is flue gas from a thermal power plant, SO 2 About 3000mg / m 3 .

Embodiment 1

[0031] A method for gas-phase desulfurization of flue gas, comprising the steps of:

[0032] (1) Using air as the carrier gas, inject a mixture of 805.5kg of urea and 78.5kg of ammonium chloride, that is, a desulfurizing agent into the reaction area, and the desulfurizing and denitrifying agent and the SO in the flue gas 2 The molar ratio is 0.9:1, and the injection pressure is 35kpa;

[0033] (2) Under the condition that the temperature of the reaction zone is 850°C, after 2 seconds of reaction, it is ready;

[0034] SO in flue gas before and after treatment was detected by flue gas analyzer 2 Concentration, calculated to give SO 2 The removal rate reached 96.0%.

Embodiment 2

[0036] The method for gas-phase desulfurization of flue gas as described in Example 1 is different in that: the temperature in the reaction zone is 950°C, and the reaction time is 2s. SO in flue gas before and after treatment was detected by flue gas analyzer 2 Concentration, calculated to give SO 2 The removal rate reached 98.0%.

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Abstract

The invention relates to a method for gas-phase desulfurization of a glue gas. The method comprises the following steps: directly gasifying an efficient desulfurizer or gasifying the efficient desulfurizer in a heating manner; then injecting the gasified desulfurizer into a desulfurization reaction area; and performing a reaction on the gasified desulfurizer and SO2 in the flue gas in a full mixing manner at a certain temperature so as to reach the purpose of desulfurization. The desulfurization rate of the method reaches more than 95%. The method is less in desulfurizer adding amount, simple to run and operate; the running cost of the method is lower than that of an existing desulfurization method, so that the economic advantage of the method provided by the invention is obvious. As the method is used, the problems of high investment, high running and maintenance cost and complicated running operation of basic facilities adopted by the existing desulfurization technology are overcome. Thus, the method is suitable for the flue gas treatment of various industrial boilers and industrial furnaces.

Description

technical field [0001] The invention relates to a method for gas-phase desulfurization of flue gas, in particular to a method for gas-phase desulfurization of flue gas by using a high-efficiency desulfurizer, and belongs to the technical field of flue gas purification treatment. technical background [0002] With the development of our country's economy, the environmental pollution caused by a large amount of energy consumption is becoming more and more serious. my country is a country where coal is the main energy source. Harmful substances such as soot, sulfur dioxide, and nitrogen oxides contained in coal-burning flue gas have caused serious air pollution. [0003] Desulfurization of thermal power plants has gone through decades in western developed countries, and there are hundreds of desulfurization technologies researched and developed. At present, there are more than a dozen kinds of applications, among which the widely used ones are circulating fluidized bed method,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/76B01D53/50
Inventor 朱维群王倩王付燕孙洪志袁爱丽
Owner SHANDONG UNIV
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