Flue gas desulfurization technology applicable to calcium and magnesium desulfuraters

A technology of desulfurization process and desulfurizer, which is applied in the direction of dispersed particle separation, chemical instruments and methods, separation methods, etc., can solve the problems of desulfurization efficiency, impurity removal effect and quality of by-products cannot be guaranteed, cannot be stable for long-term operation according to local conditions, desulfurization system Low degree of freedom and other problems, to achieve the effect of improving the reliability and flexibility of system operation, improving the degree of freedom and selectivity, and improving the reliability of stable operation

Inactive Publication Date: 2010-03-03
CECEP L&T ENVIRONMENTAL TECH
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Problems solved by technology

Due to the different desulfurizers used, the respective processes are also different, so that the degree of freedom in the operation of the desulfurization system is

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  • Flue gas desulfurization technology applicable to calcium and magnesium desulfuraters
  • Flue gas desulfurization technology applicable to calcium and magnesium desulfuraters

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[0018] Depend on figure 1 It can be seen that a flue gas desulfurization process suitable for calcium and magnesium desulfurizers consists of flue gas purification, desulfurizer preparation, flue gas desulfurization, comprehensive pool, dehydration system, and water purification system. The flue gas passes through the flue gas purification tower 1 After preliminary purification and preparation of two desulfurizers 3, it is sent to the flue gas desulfurization tower 2, and after flue gas desulfurization, it is sent to the comprehensive pool 5. When calcium oxide desulfurizer is used, it becomes a gypsum preparation system through the dehydration system 4. When using In the case of magnesium oxide desulfurizer, it becomes a magnesium sulfate heptahydrate preparation system through a water purification system 6, evaporation crystallization 7, and centrifugal drying 8, or a magnesium sulfite preparation system through a dehydration system 4.

[0019] The flue gas purification adop...

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Abstract

The invention discloses a flue gas desulfurization technology applicable to calcium and magnesium desulfuraters, which comprises flue gas purification, desulfurater preparation, flue gas desulfurization, a combined tank, a dewatering system and a water purification system and is characterized in that the flue gas purification adopts an independent spray type flue gas purification tower; the desulfurater preparation takes calcium oxide or magnesium oxide as the desulfurater; the flue gas desulfurization adopts a three-layer spray system; and serosity absorbing sulfur dioxide enters a combined tank through self-flowing. The combined tank is internally provided with an oxidization area, a crystallization area and a precipitation area. When taking calcium oxide as the desulfurater, the main component of the by-product after dehydration is plaster; and when taking magnesium oxide as the desulfurater, fertilizers products such as magnesium sulfate or magnesium sulfite can be obtained. The flue gas desulfurization technology has the beneficial effect that the design of the multifunctional combined tank realizes the use of the calcium and magnesium desulfuraters in one set of process system, thus improving the degree of freedom and selectivity of the operation of the desulfurization system. The flue gas desulfurization technology is applicable to calcium and magnesium desulfuraters.

Description

technical field [0001] The invention belongs to boiler flue gas desulfurization and purification treatment, in particular to a flue gas desulfurization process suitable for calcium and magnesium desulfurizers. Background technique [0002] Flue gas discharged from industrial boilers in thermal power plants contains SO 2 , the pollution of the environment is very serious. With the strengthening of environmental protection in our country, flue gas desulfurization technology has been applied and developed in China. At present, in the field of flue gas desulfurization, wet flue gas desulfurization technology has been widely promoted and applied. Wet flue gas desulfurization is divided into calcium oxide wet desulfurization and magnesium oxide wet desulfurization according to the different desulfurizers used. Due to the different desulfurizers used, the respective processes are also different, so that the degree of freedom in the operation of the desulfurization system is low,...

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Application Information

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IPC IPC(8): B01D53/78B01D53/50
Inventor 叶正光朱彤刘延令宋宝华钱伟
Owner CECEP L&T ENVIRONMENTAL TECH
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