High-temperature high-concentration sulfur dioxide tail gas desulfurization system and method
A technology for sulfur dioxide and desulfurization systems, applied in chemical instruments and methods, separation methods, calcium/strontium/barium sulfate, etc., can solve the problems of waste water and waste residue discharge, "white smoke from chimneys, low removal efficiency, etc." The effect of preventing clogging and wear, low cost and high desulfurization efficiency
Active Publication Date: 2015-06-10
BC P INC CHINA NAT PETROLEUM CORP +3
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[0004] In order to overcome the shortcomings of the prior art, the present invention provides a high-temperature and high-concentration sulfur dioxide tail gas desulfurization system and method, which are suitable for high-concentration SO 2 (3000~25000mg / m 3 ) tail gas treatment, can effectively overcome the SO in the prior art 2 Low inlet concentration, SO 2 Disadvantages such as low removal efficiency, high investment, poor operating environment, discharge of waste water and waste residue, and "white smoke" from the chimney in winter
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[0015] A high-temperature and high-concentration sulfur dioxide tail gas desulfurization system, such as figure 1 As shown, it includes: waste heat boiler 1, three-in-one tower 2, concentrated lye storage tank 3, lye configuration tank 4, regeneration reactor 5, quicklime silo 6, solid-liquid separation equipment 7, filtrate storage tank 8, Catalytic oxidation reaction kettle 9, plate and frame filter press 10, gypsum silo 11, etc., wherein:
[0016] The waste heat boiler 1 is connected to the upper tail gas heater of the three-in-one tower 2 through the tail gas pipeline, the three-in-one tower 2 is connected to the regeneration reaction kettle 5 through the rich liquid pipeline, and the regeneration reaction kettle 5 is connected to the alkali solution configuration tank 4 through the lean alkali solution pipeline connection, the lye configuration tank 4 is connected to the concentrated lye storage tank 3, and the lye configuration tank 4 is also connected to the three-in-on...
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The invention discloses a high-temperature high-concentration sulfur dioxide tail gas desulfurization system and method. High-temperature high-concentration SO2 tail gas is converted into tail gas at the temperature ranging from 200 DEG C to 250 DEG C after heat exchange is conduced through a waste heat boiler, converted into tail gas at the temperature ranging from 120 DEG C to 130 DEG C after heat exchange is conducted through a three-in-one tower, converted into tail gas at the temperature being 50 DEG C and the concentration below 50 mg / m<3> after making countercurrent contact with desulfurization semi-poor alkali liquor after being quickly cooled, and exhausted after being heated to more than 100 DEG C. The desulfurization semi-poor alkali liquor absorbs SO2 in the three-in-one tower to become rich liquor and then is pumped into a regeneration reaction still, desulfurizing extractant regeneration is conducted in the regeneration reaction still, and regenerated clear liquor is poor alkali liquor and directly flows into an alkali liquor containing tank. The occupied area is small, the desulfurization efficiency is high, operation and maintenance are convenient, new waste liquor, new waste residues and new waste gas are not generated in the treatment process, by-product desulfurization gypsum can serve as building raw materials, wide application prospects are achieved, and the purpose of cyclic economy is achieved.
Description
technical field [0001] The invention relates to a high-temperature and high-concentration sulfur dioxide tail gas desulfurization system and method, which are mainly used for high-concentration SO in a sulfur recovery device of a sulfur-containing natural gas processing plant 2 (3000~25000mg / m 3 ) exhaust gas treatment. Background technique [0002] At present, although the tail gas produced by the sulfur recovery unit of the sour natural gas processing plant is discharged after being incinerated, a large amount of SO in the tail gas 2 (3000~25000mg / m 3 ), which cannot meet the environmental protection emission requirements (SO in the tail gas 2 The emission concentration requirement is less than 500mg / m 3 ), it is urgent to study a high-temperature and high-sulfur tail gas to remove SO 2 process technology. [0003] SO removal from existing tail gas 2 The methods mainly include dry method, semi-dry method and wet method. Dry and semi-dry methods generally have low e...
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IPC IPC(8): B01D53/78B01D53/50B01D53/96C01F11/46
CPCY02P20/129
Inventor 雒定明曹乐季郭成华汤晓勇甘永昌张玉明谢兵高兴郭育刘文广周明宇马艳玲汤智昀
Owner BC P INC CHINA NAT PETROLEUM CORP