CN202070285U - Device for removing sulfur dioxides in sulphuric acid industrial tail gas and recovering sulphuric acid - Google Patents

Device for removing sulfur dioxides in sulphuric acid industrial tail gas and recovering sulphuric acid Download PDF

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Publication number
CN202070285U
CN202070285U CN2011201642534U CN201120164253U CN202070285U CN 202070285 U CN202070285 U CN 202070285U CN 2011201642534 U CN2011201642534 U CN 2011201642534U CN 201120164253 U CN201120164253 U CN 201120164253U CN 202070285 U CN202070285 U CN 202070285U
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China
Prior art keywords
absorption tower
sulphuric acid
tail gas
sulfuric acid
gas
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Ceased
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CN2011201642534U
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Chinese (zh)
Inventor
曹辉
陈思涛
都均利
孙成涛
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WEIHAI HUMON CHEMICAL CO Ltd
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WEIHAI HUMON CHEMICAL CO Ltd
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Abstract

A device for removing sulfur dioxides in sulphuric acid industrial tail gas and recovering sulphuric acid relates to a sulphuric acid industrial tail gas treatment device, which comprises an absorption tower, a spraying device and a demister. The spraying device is composed of a circulating pump, a metering pump, a hydrogen peroxide storage tank and a sprayer. An air inlet and an air outlet are arranged at the lower portion of the absorption tower and the top of the absorption tower respectively. A gas distribution plate is arranged above the air inlet inside the absorption tower. Gas distribution holes are evenly arranged on the gas distribution plate. The sprayer is arranged at the upper portion of the absorption tower. Diluted acid resistant packing materials are arranged between the gas distribution plate and the sprayer. The demister is arranged above the sprayer. A collection tank is arranged at the bottom of the absorption tower. A circulation port and a liquid outlet are arranged at the bottom of the collection tank. The circulation port is communicated with the sprayer through the circulating pump, and a valve is arranged on the liquid outlet. The hydrogen peroxide storage tank is communicated with a liquid inlet of the circulating pump through the metering pump. The device for removing the sulfur dioxides in sulphuric acid industrial tail gas and recovering the sulphuric acid is simple in structure, convenient to operate, low in investment and operation cost and good in desulfuration effect. The sulphur is recycled.

Description

A kind of sulfur dioxide in the sulfuric acid industry tail gas, reclaim sulfuric acid device of removing
Technical field
The utility model relates to the exhaust gas processing device of sulfuric acid industry, specifically a kind of sulfur dioxide in the sulfuric acid industry tail gas, reclaim sulfuric acid device of removing.
Background technology
China's sulfuric acid industry year SO 2About 100,000 tons of discharge capacity accounts for national SO 20.4% of discharge capacity accounts for chemical industry SO 29.0% of total emission volumn is SO bigger in the chemical industry 2Emission source.GB 26132-2010 " sulfuric acid industry pollutant emission standard " is in formal enforcement on March 1st, 2011, sulfur dioxide (SO2) emissions have had stricter regulation for sulfuric acid industry, at present, China's gas washing in SA production mainly adopts double-absorption technology, owing to be subjected to the restriction of auto levelizer conversion ratio, content of sulfur dioxide height in its tail gas is difficult to satisfy the requirement of its standard.For this reason, must increase exhaust gas processing device, the sulfuric acid industry vent gas treatment is mainly used ammonia process, amine process, natrium citricum method, alkaline process etc. at present.Realize the device structure complexity of these methods, it is big to exist investment, the operating cost height, and poor to the removal effect of sulfur dioxide in the sulfuric acid industry tail gas, desulfurization degree is low, and the existence of these problems is promoted it and is run into big obstacle in sulfuric acid industry.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of removal effect good to sulfur dioxide in the sulfuric acid industry tail gas, the desulfurization degree height, what purify that sulfur dioxide concentration sulfuric acid low, that produce in the tail gas of back is recovered utilization removes sulfur dioxide in the sulfuric acid industry tail gas, reclaim sulfuric acid device.
The technical solution of the utility model is, a kind of sulfur dioxide in the sulfuric acid industry tail gas, reclaim sulfuric acid device of removing, it is characterized in that, comprise absorption tower, spray equipment and demister, spray equipment is made up of circulating pump, measuring pump, hydrogen peroxide storage tank and spray thrower, bottom, absorption tower and top are respectively equipped with air inlet and gas outlet, the air inlet top is provided with gas distribution grid in the absorption tower, offer the distribution of gas hole on the gas distribution grid uniformly, top, absorption tower is provided with spray thrower, is provided with specific area 100 m between gas distribution grid and the spray thrower 2/ m 3-300m 2/ m 3The filler of anti-the diluted acid, spray thrower top is provided with demister, the bottom, absorption tower is provided with feeder, the feeder bottom is provided with circulation port and leakage fluid dram, circulation port is communicated with spray thrower through circulating pump, and leakage fluid dram is provided with valve, and the hydrogen peroxide storage tank is communicated with the circulating pump inlet through measuring pump.
The percent opening of gas distribution grid is at 40%-60% in the utility model.
The beneficial effects of the utility model are, use the utility model to remove sulfur dioxide, reclaim sulfuric acid in the sulfuric acid industry tail gas, removal effect to sulfur dioxide in the sulfuric acid industry tail gas is good, the desulfurization degree height, the sulfur dioxide concentration that purifies in the tail gas of back is low, and sulphur is recovered utilization, has not only reduced the production cost of sulfuric acid but also has prevented secondary pollution, device structure is simple, easy and simple to handle, invest little, operating cost is low.
Description of drawings
Accompanying drawing is a kind of structural representation of the present utility model, also is the schematic diagram of a kind of embodiment.
The specific embodiment
A kind of sulfur dioxide in the sulfuric acid industry tail gas, reclaim sulfuric acid device of removing, comprise absorption tower 10, spray equipment and demister 8, spray equipment is made up of circulating pump 3, measuring pump 2, hydrogen peroxide storage tank 1 and spray thrower 7,10 bottoms, absorption tower and top are respectively equipped with air inlet 11 and gas outlet 9, air inlet 11 tops are provided with gas distribution grid 5 in the absorption tower 10, offer the distribution of gas hole on the gas distribution grid 5 uniformly, percent opening can make the gas of input evenly distribute at 40%-60%.10 tops, absorption tower are provided with spray thrower 7, are provided with specific area 100 m between gas distribution grid 5 and the spray thrower 7 2/ m 3-300m 2/ m 3The filler of anti-diluted acid the 6, spray thrower 7 tops are provided with demister 8,10 bottoms, absorption tower are provided with feeder 4, feeder 4 bottoms are provided with circulation port and leakage fluid dram 13, circulation port is communicated with spray thrower 7 through circulating pump 3, leakage fluid dram 13 is provided with valve 12, and hydrogen peroxide storage tank 1 is communicated with circulating pump 3 inlets through measuring pump 2.
During use, air inlet 11 is connected with the tail gas outlet of acid-producing apparatus, leakage fluid dram 13 is connected with the circulation acid tank of acid-producing apparatus dry absorption section, and adding concentration in feeder 4 is the hydrogen peroxide solution of 0.1-5%, adds the higher hydrogen peroxide solution of concentration in hydrogen peroxide storage tank 1.The sulfuric acid industry tail gas that contains sulfur dioxide is entered by bottom, absorption tower air inlet, circulating pump pumps into hydrogen peroxide solution in the spray thrower on top, absorption tower, hydrogen peroxide solution is drenched down by top, gas-liquid is abundant haptoreaction in the packing layer of anti-diluted acid the in the middle of the tower, and the sulfur dioxide in the tail gas is converted into dilute sulfuric acid by the hydrogen peroxide absorption and falls in the feeder of bottom, absorption tower.When the hydrogen peroxide concentration of solution in the feeder was higher than 0.1%, solution entered spray thrower by the circulation port of feeder bottom through circulating pump, realized circulated sprinkling; When hydrogen peroxide concentration is lower than 0.1% in the solution, open in valve enters its part dry absorption section by the leakage fluid dram of feeder bottom the circulation acid tank as regulating sour dense water, a part is replenished an amount of hydrogen peroxide solution by measuring pump, hydrogen peroxide content is controlled at 0.1%-5%, and then enters the spray thrower spray.Volume by the additional hydrogen peroxide solution of measuring pump is identical with the liquor capacity of leakage fluid dram discharge, guarantees the long-play of device.
Using said apparatus is 150 m to flow 3/ h, content of sulfur dioxide are 1300mg/Nm 3Sulfuric acid industry tail gas handle, in feeder, add concentration and be 5% hydrogen peroxide solution, the hydrogen peroxide spray flux is 1.2m 3/ h, content of sulfur dioxide is reduced to 40-60mg/Nm in the tail gas after the processing 3, handle the dilute sulfuric acid 58Kg that reclaimed concentration 13.2% in 26 hours.
Use said apparatus that exhaust flow is 23000Nm 3/ h, content of sulfur dioxide are 1300mg/Nm 3The industrial tail gas that produces of pyrite-based sulfuric acid production equipment handle, in feeder, add concentration and be 2% hydrogen peroxide solution, the hydrogen peroxide spray flux is spray flux 180m 3/ h, content of sulfur dioxide is reduced to 40-60mg/Nm in the tail gas after the processing 3, 8.5 tons of the diluted acids of day recovery concentration 13% all are added to do and inhale the circulation acid tank, can improve 1.1 tons of folding hundred acid yields day.
Use the utility model to remove sulfur dioxide, reclaim sulfuric acid in the sulfuric acid industry tail gas, desulfurization degree height, removal effect are good, the sulfur dioxide concentration that purifies in the tail gas of back is low, the diluted acid that produces is recovered to sulfuric acid production system and utilizes, not only realized reducing discharging reducing and polluted, reduce the gas washing in SA production cost again, belonged to the desulfur technology of green cleaning.The absorption tower is simple in structure, easy and simple to handle, invest little, operating cost is low, effective, should in sulfuric acid industry tail gas desulfurization project, apply.

Claims (2)

1. one kind removes sulfur dioxide in the sulfuric acid industry tail gas, reclaim sulfuric acid device, it is characterized in that, comprise absorption tower, spray equipment and demister, spray equipment is made up of circulating pump, measuring pump, hydrogen peroxide storage tank and spray thrower, bottom, absorption tower and top are respectively equipped with air inlet and gas outlet, the air inlet top is provided with gas distribution grid in the absorption tower, offer the distribution of gas hole on the gas distribution grid uniformly, top, absorption tower is provided with spray thrower, is provided with specific area 100 m between gas distribution grid and the spray thrower 2/ m 3-300m 2/ m 3The filler of anti-the diluted acid, spray thrower top is provided with demister, the bottom, absorption tower is provided with feeder, the feeder bottom is provided with circulation port and leakage fluid dram, circulation port is communicated with spray thrower through circulating pump, and leakage fluid dram is provided with valve, and the hydrogen peroxide storage tank is communicated with the circulating pump inlet through measuring pump.
2. sulfur dioxide in the sulfuric acid industry tail gas, the reclaim sulfuric acid device of removing according to claim 1, it is characterized in that: the percent opening of said gas distribution grid is at 40%-60%.
CN2011201642534U 2011-05-23 2011-05-23 Device for removing sulfur dioxides in sulphuric acid industrial tail gas and recovering sulphuric acid Ceased CN202070285U (en)

Priority Applications (1)

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CN2011201642534U CN202070285U (en) 2011-05-23 2011-05-23 Device for removing sulfur dioxides in sulphuric acid industrial tail gas and recovering sulphuric acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201642534U CN202070285U (en) 2011-05-23 2011-05-23 Device for removing sulfur dioxides in sulphuric acid industrial tail gas and recovering sulphuric acid

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102228776A (en) * 2011-05-23 2011-11-02 威海恒邦化工有限公司 Method and apparatus for removing sulfur dioxide from sulfuric acid industrial tail gas, and for recovering sulfuric acid
CN102631824A (en) * 2012-04-23 2012-08-15 瓮福(集团)有限责任公司 Method for reducing emission of tail gas generated in sulphuric acid production

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102228776A (en) * 2011-05-23 2011-11-02 威海恒邦化工有限公司 Method and apparatus for removing sulfur dioxide from sulfuric acid industrial tail gas, and for recovering sulfuric acid
CN102631824A (en) * 2012-04-23 2012-08-15 瓮福(集团)有限责任公司 Method for reducing emission of tail gas generated in sulphuric acid production

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C32 Full or partial invalidation of patent right
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Decision date of declaring invalidation: 20140820

Decision number of declaring invalidation: 23582

Granted publication date: 20111214