Process for eliminating SOx in flue by activated carbon based adsorbent

An adsorbent and activated carbon technology, applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of no comprehensive utilization of by-product gypsum, secondary pollution, high operating costs, and improve sulfur capacity and use efficiency. Effect

Inactive Publication Date: 2005-02-23
OCEAN UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above methods either have large investment and high operating costs, or the waste desulfurizer cannot be used after desulfurization, causing secondary pollution. For large-capacity boilers in power plants, the stacking of waste slag is restricted by freight costs or limited by site stacking, all of which affect desulfurization. Key Factors for Technology Commercialization
Therefore, these technologies are currently difficult to promote and use on a large scale in my country.
Among them, the flue gas desulfurization technology (FGD lime powder injection method), which has been commercially applied on a large scale in the world, has a high degree of technical maturity. There are also power plants in my country that have introduced it. However, due to high cost, large investment, and no comprehensive utilization of by-product gypsum no success

Method used

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  • Process for eliminating SOx in flue by activated carbon based adsorbent
  • Process for eliminating SOx in flue by activated carbon based adsorbent
  • Process for eliminating SOx in flue by activated carbon based adsorbent

Examples

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Effect test

Embodiment 1

[0014] Such as figure 2 As shown, three reaction towers are used to operate individually or in series (parallel). The diameter of the reaction tower is 70mm, the loading volume of each tower is 1 liter, and the weight is 581 grams of active semi-coke adsorbent. The desulfurization temperature is 90 ℃ and the space velocity is 900h. -1 , the flue gas composition is SO 2 800-2600ppm, O 2 9.5-14.8%, CO75-435ppm, the rest is N 2 and CO 2 Under certain conditions, the process operation is as follows: firstly open No. 1 and No. 2 valves, and the flue gas enters into No. 1 # In the desulfurization reaction tower, the desulfurized and purified flue gas enters the purified pipeline through the No. 2 valve and is discharged into the chimney; when 1 # Tower outlet gas SO 2 When the detection exceeds the standard (such as 200ppm), then close the No. 2 valve, and open the No. 3 and No. 5 valves at the same time. At this time, 1 # Desulfurization reaction tower and 2 # Desulfurizat...

Embodiment 2

[0016] Such as image 3 As shown, three reaction towers are used to operate individually or in series (parallel). The diameter of the reaction tower is 70mm, the loading volume of each tower is 1 liter, and the weight is 581 grams of active semi-coke adsorbent. The desulfurization temperature is 90 ℃ and the space velocity is 900h. -1 , the flue gas composition is SO 2 800-2600ppm, O 2 9.5-14.8%, CO75-435ppm, the rest is N 2 and CO 2 Under certain conditions, the process operation is as follows: firstly open No. 1 and No. 2 valves, and the flue gas enters into No. 1 # In the desulfurization reaction tower, the desulfurized and purified flue gas enters the purified pipeline through the No. 2 valve and is discharged into the chimney; when 1 # Tower outlet gas SO 2 When the detection exceeds the standard (such as 200ppm), then close the No. 2 valve, and open the No. 3 and No. 5 valves at the same time. At this time, 1 # Desulfurization reaction tower and 2 # Desulfurizati...

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Abstract

A process for removing SO2 from fume by use of the activated carbon-based adsorbent features that the fume containing SO2 flows through the desulfurizing tower (or tank) filled by activated carbon-based adsorbent, and said adsorbent can be regenerated by hot water washing or high-temp inertial gas scavenging. Its by-product is H2SO4 or S.

Description

technical field [0001] The invention relates to a method for removing SO in flue gas 2 More specifically, it is a process that uses activated carbon-based adsorbents to remove SO from flue gases such as coal-fired power plants, coal-fired boilers, and coal-fired kilns. 2 craft. Background technique [0002] Coal accounts for 69% of my country's energy consumption structure, and a large amount of coal combustion has caused the country's air to be polluted by soot. Especially since the 1980s, with the rapid development of my country's economy, coal consumption has increased day by day, SO 2 Emissions continue to grow, resulting in serious air pollution. According to statistics, in 1985 my country's SO 2 The emissions were 15.3 million tons, 17.52 million tons in 1990, and increased to 23.7 million tons in 1995. At this rate, it is estimated that SO 2 Emissions will be 25.9 million tonnes. Thanks to SO 2 A large amount of discharge, causing damage to the ecological enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04
Inventor 李春虎
Owner OCEAN UNIV OF CHINA
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