CN101612515A - A kind of wet flue gas desulfurization method - Google Patents
A kind of wet flue gas desulfurization method Download PDFInfo
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- CN101612515A CN101612515A CN200810127471A CN200810127471A CN101612515A CN 101612515 A CN101612515 A CN 101612515A CN 200810127471 A CN200810127471 A CN 200810127471A CN 200810127471 A CN200810127471 A CN 200810127471A CN 101612515 A CN101612515 A CN 101612515A
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Abstract
The invention discloses a kind of wet flue gas desulfurization method, in desulfurizing tower, contact SO in the absorption flue gas with flue gas with alkaline absorbent
2, obtain to contain the absorption liquid of sulphite, gained is contained the absorption liquid and the sulfuric acid reaction of sulphite, the SO that reaction is separated out
2Gas is sent to acid making system and makes sulfuric acid, collects reaction gained solid precipitum sulfate by Separation of Solid and Liquid.The present invention can handle absorption liquid with the sulfuric acid in the spent acid, has not only shortened handling process, has saved great deal of investment and operating cost, and the SO that absorbs from flue gas
2Enter acid making system again, make resource obtain recycling.
Description
Technical field
The present invention relates to wet flue gas desulfurization method.
Background technology
Present traditional wet method calcium method, sodium method, magnesium method sulfur removal technology, all adopting magnesia, NaOH or aqua calcis (or slurries) is absorbent, in desulfurizing tower with flue gas in SO
2Reaction generates sulphite, and the absorption liquid that will contain sulphite is then sent in the oxidizing tower and carried out oxidation with compressed air, produces sulfate, through sedimentation, filter and carry out Separation of Solid and Liquid, send wastewater treatment or discharging at last.The shortcoming of this method is that the handling process of desulfurization absorption liquid is long, and equipment investment is higher; Need to consume a large amount of compressed air and carry out oxidation, the operating cost height; The SO that from flue gas, absorbs
2Can not be recovered utilization; Under the not high situation of oxidation efficiency, contain not oxidized sulphite in the waste water, can produce secondary pollution.
Summary of the invention
The purpose of this invention is to provide a kind of wet flue gas desulfurization method, can shorten the handling process of absorption liquid, reduce equipment investment and operating cost, and the SO in the flue gas
2Can be reused.
The present invention is achieved in that and comprises with alkaline absorbent contact SO in the absorption flue gas with flue gas in desulfurizing tower
2, obtain to contain the absorption liquid of sulphite, it is characterized in that gained is contained the absorption liquid and the sulfuric acid reaction of sulphite, the SO that reaction is separated out
2Gas is sent to acid making system and makes sulfuric acid, collects reaction gained solid precipitum sulfate by Separation of Solid and Liquid.
Described absorption liquid directly is sent to acid making system, with the spent acid reaction that acid making system produces, can utilize the equipment such as sedimentation, filtration of acid making system, does not need newly added equipment, and investment reduces.
The present invention handles absorption liquid with the sulfuric acid in the spent acid, does not need oxidation furnaces, and can make full use of equipment such as sedimentation in the acid making system, filtration, has not only shortened handling process, and can save great deal of investment and operating cost.The SO that from flue gas, absorbs
2Enter acid making system again, make resource obtain recycling.For producing the flow process that spent acid need be handled, in the process of sulfuric acid in the spent acid and sulphite reaction, consumed the part spent acid, reduced the spent acid amount that needs processing, reduced the spent acid disposal cost.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
As shown in Figure 1, in the absorption liquid in the absorption tower 2 is replenished by storage tank 14.Flue gas from pipeline 5 contacts in reverse jet tube 3 with from the circulating absorption solution in the absorption tower 2, the SO in the flue gas
2With the absorption liquid reaction, the sulphite of generation dissolves or is suspended in the absorption liquid, and the flue dust in the flue gas is absorbed the liquid washing, is suspended in the absorption liquid; Flue gas behind the desulfurization and dedusting leads to chimney to tail gas by pipeline 5 and effluxes, and reverse jet tube 3 required purifying waste water are carried by pipeline 4, and pipeline 7 is carried flushing water to absorption tower 2.Circulating absorption solution part in the absorption tower 2 is sent into the spent acid reaction that concentration is 5-15% sulfuric acid that contains from acid making system of carrying with pipeline 10 in the purification subsider 11 in the acid making system by pipeline 1, and the sulphite in the absorption liquid is also separated out SO with sulfuric acid reaction generation sulfate
2Gas, the SO that separates out
2Gas returns sulfate system relieving haperacidity by pipeline 8, and sulfate precipitation thing and flue dust sediment deal with after by filter press 9 press filtrations in addition.Purify the spent acid of discharging in the subsider 11 and the filtrate of filter press 9 and collect 12 by the supernatant liquid bath, its supernatant is pumped to spent acid by pipeline 13 with pump and is handled.
Absorption liquid can be magnesia, NaOH or aqua calcis.
Claims (2)
1, a kind of wet flue gas desulfurization method comprises with alkaline absorbent contact SO in the absorption flue gas with flue gas in desulfurizing tower
2, obtain to contain the absorption liquid of sulphite, it is characterized in that gained is contained the absorption liquid and the sulfuric acid reaction of sulphite, the SO that reaction is separated out
2Gas is sent to acid making system and makes sulfuric acid, collects reaction gained solid precipitum sulfate by Separation of Solid and Liquid.
2, right 1 described a kind of wet flue gas desulfurization method as requested is characterized in that described absorption liquid directly is sent to the spent acid reaction that acid making system and acid making system produce.
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| CN 200810127471 CN101612515B (en) | 2008-06-28 | 2008-06-28 | Wet flue gas desulfurization method |
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| CN 200810127471 CN101612515B (en) | 2008-06-28 | 2008-06-28 | Wet flue gas desulfurization method |
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| CN101612515A true CN101612515A (en) | 2009-12-30 |
| CN101612515B CN101612515B (en) | 2013-01-02 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580486A (en) * | 2012-02-28 | 2012-07-18 | 浙江南化防腐设备有限公司 | Novel zinc oxide desulfurization method and device |
| CN103041682A (en) * | 2012-10-02 | 2013-04-17 | 云南云天化国际化工股份有限公司 | Application method of fine desulfurization in sulfuric acid exhaust absorption |
| CN105311942A (en) * | 2014-07-18 | 2016-02-10 | 福建省荔元活性炭实业有限公司 | Active-carbon exhaust-gas cyclic absorption system |
| CN106799127A (en) * | 2017-03-06 | 2017-06-06 | 哈尔滨理工大学 | A kind of waste heat recovery plant of double alkali method desulfurizing system |
| CN107150999A (en) * | 2017-02-28 | 2017-09-12 | 绍兴文理学院 | A kind of technique of oxygen deprivation method Sulphuric acid |
| CN107537285A (en) * | 2017-08-25 | 2018-01-05 | 金川集团股份有限公司 | A kind of metallurgical off-gas acid-making waste water multi-layer circulation recycle system and method |
| CN109045975A (en) * | 2018-08-28 | 2018-12-21 | 天津市岩丰精机有限责任公司 | A kind of lepidolite baking flue gas treatment process |
| CN113797734A (en) * | 2021-09-30 | 2021-12-17 | 鲍倩 | Device and method for treating flue gas |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086148C (en) * | 1997-03-21 | 2002-06-12 | 沈阳环境科学研究所 | New technology for absorbing and eliminating sulfur dioxide in smoke chemically |
| CN100368061C (en) * | 2003-09-24 | 2008-02-13 | 郑州海天电力环保实业有限公司 | Integration method for ammonia process of desulfurizing flue gas and multiple utilizing desulfurized products and equipment |
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2008
- 2008-06-28 CN CN 200810127471 patent/CN101612515B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580486A (en) * | 2012-02-28 | 2012-07-18 | 浙江南化防腐设备有限公司 | Novel zinc oxide desulfurization method and device |
| CN103041682A (en) * | 2012-10-02 | 2013-04-17 | 云南云天化国际化工股份有限公司 | Application method of fine desulfurization in sulfuric acid exhaust absorption |
| CN103041682B (en) * | 2012-10-02 | 2016-05-11 | 云南云天化国际化工股份有限公司 | The application process of a kind of smart desulfurization in sulfuric acid tail is inhaled |
| CN105311942A (en) * | 2014-07-18 | 2016-02-10 | 福建省荔元活性炭实业有限公司 | Active-carbon exhaust-gas cyclic absorption system |
| CN107150999A (en) * | 2017-02-28 | 2017-09-12 | 绍兴文理学院 | A kind of technique of oxygen deprivation method Sulphuric acid |
| CN106799127A (en) * | 2017-03-06 | 2017-06-06 | 哈尔滨理工大学 | A kind of waste heat recovery plant of double alkali method desulfurizing system |
| CN107537285A (en) * | 2017-08-25 | 2018-01-05 | 金川集团股份有限公司 | A kind of metallurgical off-gas acid-making waste water multi-layer circulation recycle system and method |
| CN109045975A (en) * | 2018-08-28 | 2018-12-21 | 天津市岩丰精机有限责任公司 | A kind of lepidolite baking flue gas treatment process |
| CN113797734A (en) * | 2021-09-30 | 2021-12-17 | 鲍倩 | Device and method for treating flue gas |
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| CN101612515B (en) | 2013-01-02 |
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Inventor after: Song Xiuming Inventor after: Liang Haiwei Inventor after: Wang Weidong Inventor before: Liang Haiwei Inventor before: Wang Weidong |
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