Process for disposing SOx in discharge gas

A technology for waste gas and waste water, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of large water evaporation, high water consumption and energy consumption, and achieve reduced evaporation, water consumption and energy consumption. , water consumption and energy consumption reduction effect

Active Publication Date: 2009-02-11
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to overcome the existing problems of treating SO in exhaust gas with ammonia nitrogen-containing absorption liquid. x The shortcomings of large water evaporation, high water consumption and energy consumption in the technology provide a new method for treating SO in waste gas with ammonia nitrogen-containing absorption liquid. x Methods

Method used

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  • Process for disposing SOx in discharge gas
  • Process for disposing SOx in discharge gas

Examples

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example 1

[0038] Prepare the solution whose ammonium sulfate concentration is 90g / L, add sodium metaaluminate, make Al in the solution 2 o 3 The concentration of the solution is 9g / L, and then add ammonia water to adjust the pH value, so that the pH value of the solution is 13.

[0039] according to figure 1 In the process shown, in a laboratory small-scale absorption device (the ratio of height to diameter of the absorption tower is 5:1), the temperature of 130°C and SO x (the SO 2 with SO 3 The volume ratio is 9:1) the content is 2158mg / Nm 3 The FCC regenerated flue gas (taken from the catalytic cracking unit of Jinan Oil Refinery); the above prepared absorption liquid is heated to 60°C, sprayed from the top of the absorption device, and contacted with the waste gas rising from the bottom of the absorption tower, the gas and absorption liquid Volume ratio is 300Nm 3 / m 3 , the gas superficial velocity is 9000Nm 3 / (m 2 h); the contacted absorption liquid is collected in the s...

example 2

[0041] Absorption liquid uses catalyzer to produce molecular sieve to exchange and wash the wastewater containing ammonia nitrogen and silicon aluminum in this example (from Qilu Petrochemical Company Catalyst Factory molecular sieve device), wherein ammonium sulfate concentration is 18.1g / L, Al 2 o 3 The concentration is 3.6g / L, SiO 2 The concentration is 5.1g / L, and the pH value is 9.5.

[0042] according to figure 2 In the process shown, in the laboratory small-scale absorption device, the temperature of 130 ℃, SO x The content is 2158mg / Nm 3 (the SO 2 with SO 3 The volume ratio is 9:1) of the FCC regenerated flue gas (taken from the catalytic cracking unit of Jinan Oil Refinery); the above-mentioned absorption liquid is heated to 80 ° C, sprayed from the top of the absorption unit and contacted with the waste gas rising from the bottom of the absorption tower; The contacted absorption liquid is collected in the storage tank at the bottom of the absorption tower, and...

example 3

[0044] Prepare a solution with an ammonium sulfate concentration of 150g / L, add sodium silicate, and make SiO in the solution 2 The concentration of the solution is 14g / L, then add ammonia water to adjust the pH value, so that the pH value of the solution is 11.

[0045] according to figure 1 In the process shown, in a laboratory small-scale absorption device (the ratio of height to diameter of the absorption tower is 5:1), the temperature of 130°C and SO x (the SO 2 with SO 3 The volume ratio is 9:1) the content is 2158mg / Nm 3 The FCC regenerated flue gas (taken from the catalytic cracking unit of Jinan Oil Refinery); the above prepared absorption liquid is heated to 90°C, sprayed from the top of the absorption device, and contacted with the waste gas rising from the bottom of the absorption tower, the gas and absorption liquid The volume ratio is 300Nm 3 / m 3 , the gas superficial velocity is 9000Nm 3 / (m 2 h); the contacted absorption liquid is collected in the stor...

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Abstract

The method of eliminating SOx from waste gas is to make waste gas containing SOx contact to absorption liquid, which contains ammonium compound and / or ammonia, and aluminum containing compound and / or silicon containing compound in the amount of 0.5-150 g / L. The method of eliminating SOx from waste gas has lowered water evaporating amount, lowered water consumption and power consumption, and no production of solid waste.

Description

technical field [0001] The invention relates to a method for treating SO in waste gas x Methods. Background technique [0002] SO in exhaust gas x It is the main substance that forms acid rain. All countries have formulated strict emission standards to limit its emission. GB16297-1996 stipulates that SO in exhaust gas in my country 2 The highest emission concentration: the existing pollution source is 700mg / Nm 3 , the new pollution source is 550mg / Nm 3 . Coal-fired boilers, thermal power plants, and FCC regeneration in refineries produce a large amount of SO x Exhaust gas, depending on the source, its concentration can reach 1000 ~ 15000mg / Nm 3 , much higher than the national standard. [0003] SO removal from waste gas x There are many kinds of techniques, and the absorption method is one of the important techniques, which has been widely used. [0004] FI851623 discloses a method of absorbing SO by using powdered calcium hydroxide or magnesium hydroxide activated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50
Inventor 贺振富龙军田辉平达志坚张久顺石德先朱玉霞李阳邵潜王宏伟
Owner CHINA PETROLEUM & CHEM CORP
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