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Method of separating and recovering sulfur dioxide in smoke using ammonia method

A sulfur dioxide and flue gas technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of high treatment cost of absorbing liquid, difficult to eliminate aerosol, difficult operation, etc., and achieve easy operation, aerosol The effect of less and saving absorption liquid

Inactive Publication Date: 2007-06-20
JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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Problems solved by technology

However, in the treatment of large flue gas volumes, especially in the treatment of flue gas from bituminous coal power plant boilers, the existing ammonia technology has exposed problems such as high ammonia consumption, difficulty in eliminating aerosols, high cost of absorbing liquid treatment, and difficult operation.
These technical difficulties make the popularization of ammonia desulfurization technology encounter great obstacles

Method used

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  • Method of separating and recovering sulfur dioxide in smoke using ammonia method
  • Method of separating and recovering sulfur dioxide in smoke using ammonia method

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specific Embodiment

[0014] A 75t / h coal-fired industrial boiler with a flue gas volume of 110,000Nm 3 / h, boiler coal consumption 18.48t / h, coal-fired total sulfur 3%, exhaust gas temperature 170°C, original dust content 6500mg / Nm 3 , ESP efficiency is 98.5%. The desulfurization tower is φ4500×H24000, adopts an empty tower structure and is divided into two sections and three-stage spraying, without filler (as shown in Figure 1).

[0015] Operating parameters:

[0016] Cooling and dust removal section—absorption liquid concentration 432g / l, alkalinity 16 titer, spray volume 120m 3 / h, the temperature of the flue gas exiting the cooling and dust removal section is 46°C.

[0017] Main absorption section—absorption liquid concentration 246g / l, alkalinity 21 titer, spray volume 120m 3 / h. .

[0018] Demist and ammonia removal section - water spray volume 12m 3 / h, the washing liquid is boiler waste water and make-up water.

[0019] result:

[0020] By-product ammonium salt components are ammo...

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Abstract

A process for separating and recovering SO2 from fume by ammonia method and use of an absorption tower with multiple function stages includes such steps as dusting and cooling by spraying the absorbing liquid A, master absorption by spraying the absorbing liquid B, frost and ammonia removal by spraying the absorbing liquid C, and exhausting clean fume.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for removing and recovering sulfur dioxide in flue gas, in particular to an ammonia method for removing and recovering sulfur dioxide in flue gas. Background technique [0002] Flue gas, especially coal-fired boiler flue gas, is one of the most important sources of air pollution and has become an important object of environmental governance. At present, China's annual SO emissions from flue gas into the atmosphere 2 The total amount is about 20 million tons. This should be a sulfur resource with great value, but it has become a pollution source with great environmental hazards. In the existing flue gas desulfurization purification technology, ammonia desulfurization can produce sulfuric acid, sulfur dioxide, ammonium sulfate, ammonium sulfite and other products by-products during desulfurization, realizing the recycling of sulfur resources without any sec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/79B01D53/50
Inventor 徐长香罗静傅国光
Owner JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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