CN101804299A - Dry type desulfurizing, spraying and humidifying device and spraying and humidifying method - Google Patents
Dry type desulfurizing, spraying and humidifying device and spraying and humidifying method Download PDFInfo
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- CN101804299A CN101804299A CN 201010142324 CN201010142324A CN101804299A CN 101804299 A CN101804299 A CN 101804299A CN 201010142324 CN201010142324 CN 201010142324 CN 201010142324 A CN201010142324 A CN 201010142324A CN 101804299 A CN101804299 A CN 101804299A
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Abstract
The invention relates to a purifying technology of coal burning smoke, in particular to a dry type desulfurizing, spraying and humidifying device and a spraying and humidifying method. The front of the entrance of a dry type desulfurizing tower of the device is connected with a section of vertical pre-humidifying flue, and the pre-humidifying flue is internally provided with an atomizing nozzle, wherein a water pass quantity regulating device and an air regulating device of the atomizing nozzle are respectively connected with a water pump and an air compressor; the water quantity regulating device and the air regulating device are controlled through a controller; a detection signal input part of the controller is connected with a thermoelectric couple at a smoke outlet; the dry type desulfurizing tower is internally provided with a set of single-layer nozzles close to a smoke inlet, wherein the jet directions of the single-layer nozzles are the same as the flowing direction of smoke; and fog plumes of each nozzle are not superposed, and the distances of the nozzles on the periphery with the wall of the tower are larger than the fog plume radius of the nozzles. Proved by experimental tests and numerical simulation analysis, the device and the method have good cooling and humidifying effects, and meanwhile, the effect of overcoming wet walls and scaling is obviously improved.
Description
Technical field
The present invention relates to the purification techniques of coal-fired flue-gas, specifically is a kind of dry type desulfurizing spray-type humidifier and spray humidification method.
Background technology
The spray humidification method has very large influence to the dry flue gas desulphurization effect, in flue gas cool-down, humidification process, takes place between flue gas and the droplet to conduct heat and mass transfer, and the flue gas heat release, the droplet evaporation is to the activation highly significant of dry calcium-based desulfurizing agent.If but humidification is improper, be easy to cause wet wall and scale formation, and then cause the increase of desulphurization system resistance, accelerated corrosion, influence system's continous-stable operation, even the safety that threatens boiler.Realize good cooling, humidification, need to adopt suitable spray humidification method and arrangement of nozzles.
In dry flue gas desulphurization system (as the system of Japanese NFK company), after the high speed flue gas enters reaction tower from a side, because effect of inertia, form eddy current " stagnant area " at the opposite side of reaction tower.And along with the rising of flue gas stream in reaction tower, the flue gas water content in the stagnant area is more and more higher, and flue-gas temperature is then more and more lower, until above reaction tower near or reach capacity.
Cause wet wall to mainly contain the reason of two aspects: the reaction tower wall that the flue gas behind (1) humidification and temperature are lower contacts, and reaches capacity the dewfall wall that wets at the reaction tower inwall; (2) because the obvious heat of smoke after the cooling reduces, and the evaporation driving force reduces, at the desulphurization reaction of design in the time, the droplet carburation by evaporation that also is not able to do in time carries down at eddy current, collides in the reaction tower inwall and wet wall.Existing spray humidification method still can't reach the effect of being satisfied with overcoming wet wall aspect fouling.
Summary of the invention
Technical problem to be solved by this invention is, provides that a kind of humidifying cooling is effective, is difficult for the dry type desulfurizing spray-type humidifier and the spray humidification method of wet wall and fouling in the reaction tower.
The inventive system comprises a dry type desulfurizing tower, the dry type desulfurizing top of tower is a smoke inlet, and dry type desulfurizing tower one side is provided with exhanst gas outlet; Connect one section vertical pre-humidification flue before the inlet of described dry type desulfurizing tower, in pre-humidification flue, be provided with atomizer, the water-quantity regulating device that passes through of atomizer is connected with air compressor machine with water pump respectively with conditioner, described water-quantity regulating device and conditioner are controlled by a controller, and the detection signal importation of controller is connected with the thermocouple that is positioned at exhanst gas outlet; Be provided with the injection direction one group individual layer nozzle identical with the flow of flue gas direction near the smoke inlet place in the dry type desulfurizing tower, the nozzle of the mist plumage radius non-overlapping of each nozzle and periphery and the distance of tower wall are greater than the mist plumage radius of nozzle.
Spray humidification method of the present invention is on the said apparatus basis, before flue gas enters desulfurizing tower, spray into water smoke by atomizer in pre-humidification flue and fall wet humidification, the injection direction of nozzle becomes 30 ° of angles with flue gas flow direction, makes flue-gas temperature drop to 90 ℃ in pre-humidification flue; The nozzle of individual layer is arranged in the porch of reaction tower, and the jet expansion direction is identical with the flow of flue gas direction, makes the mist plumage radius of the distance of the nozzle of the mist plumage non-overlapping of each nozzle and periphery and tower wall greater than nozzle; Make the smoke outlet flue-gas temperature drop to 75 ℃ from 90 ℃.
Through experiment test and numerical simulation analysis, prove that device and method of the present invention has good cooling, humidification effect, its effect that overcomes wet wall and fouling significantly improves simultaneously.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the distribution schematic diagram of individual layer nozzle mist plumage in the desulfurizing tower;
Fig. 3 be the present invention in implementation process 5 meters, nozzle bottom along the temperature profile at desulfurizing tower center.
The specific embodiment
As shown in Figure 1, the inventive system comprises a dry type desulfurizing tower 1, the dry type desulfurizing top of tower is a smoke inlet, and dry type desulfurizing tower one side is provided with exhanst gas outlet; Connect one section vertical pre-humidification flue 2 before the inlet of described dry type desulfurizing tower, in pre-humidification flue, be provided with atomizer 3, the water-quantity regulating device that passes through of atomizer is connected with air compressor machine with water pump respectively with conditioner, described water-quantity regulating device and conditioner are controlled by a controller, and the detection signal importation of controller is connected with the thermocouple that is positioned at exhanst gas outlet; Be provided with the nozzle 4 of the injection direction one group individual layer identical with the flow of flue gas direction in the dry type desulfurizing tower near the smoke inlet place, the nozzle of the mist plumage A non-overlapping of nozzle and periphery and the distance of tower wall are greater than the mist plumage radius of nozzle.
Spray humidification method of the present invention is: on the said apparatus basis, before flue gas enters desulfurizing tower, spray into water smoke by atomizer in pre-humidification flue and fall wet humidification, the injection direction of nozzle becomes 30 ° of angles with flue gas flow direction.Because this section flue cigarette temperature is higher, the water smoke atomization condition is good, and the carburation by evaporation condition is good, the reduction flue-gas temperature that can gasify at short notice, and flue-gas temperature drops to 90 ℃ (being higher than 35 ℃ of dew points) from high temperature (under 130 ℃).Because the flue gas flow rate in the flue is very fast, and erosive wear is serious, the liner of flue adopts the material with very strong antiseptic property simultaneously, and inner wall smooth is even wet ash also is difficult for sticking wall.The nozzle of individual layer is arranged in the porch of reaction tower, and the jet expansion direction is identical with the flow of flue gas direction, uses a plurality of low discharge nozzles.Flue-gas temperature drops to 75 ℃ from 90 ℃.Arrangement of nozzles should reduce overlapping as far as possible.Because flue gas flow velocity in reaction tower is lower, have only 4m/s, for preventing wet wall, with the wall adjacent nozzles, the distance of itself and wall should be a bit larger tham mist plumage radius.
As shown in Figure 3 be said apparatus and method in actual moving process, 5 meters, nozzle bottom are along the temperature profile at reaction tower center, the result of experiment test and numerical simulation analysis meets well.Measured result shows that flue-gas temperature is up to 80 ℃, and lowest part reaches 75 ℃.From figure, excursion is ± 2.5 ℃.Show that the present invention has humidifying cooling effect preferably.
Claims (2)
1. dry type desulfurizing spray-type humidifier, include a dry type desulfurizing tower, the dry type desulfurizing top of tower is a smoke inlet, dry type desulfurizing tower one side is provided with exhanst gas outlet, it is characterized in that: connect one section vertical pre-humidification flue before the inlet of described dry type desulfurizing tower, in pre-humidification flue, be provided with atomizer, the water-quantity regulating device that passes through of atomizer is connected with air compressor machine with water pump respectively with conditioner, described water-quantity regulating device and conditioner are controlled by a controller, and the detection signal importation of controller is connected with the thermocouple that is positioned at exhanst gas outlet; Be provided with the injection direction one group individual layer nozzle identical with the flow of flue gas direction near the smoke inlet place in the dry type desulfurizing tower, the nozzle of the mist plumage non-overlapping of each nozzle and periphery and the distance of tower wall are greater than the mist plumage radius of nozzle.
2. a dry type desulfurizing spray humidification method is, it is characterized in that: on the described device basic of claim 1, before flue gas enters desulfurizing tower, in pre-humidification flue, spray into water smoke by atomizer and fall wet humidification, the injection direction of nozzle becomes 30 ° of angles with flue gas flow direction, make flue-gas temperature drop to 90 ℃ in pre-humidification flue; The nozzle of individual layer is arranged in the porch of reaction tower, and the jet expansion direction is identical with the flow of flue gas direction, makes the mist plumage radius of the distance of the nozzle of the mist plumage non-overlapping of each nozzle and periphery and tower wall greater than nozzle; Make the smoke outlet flue-gas temperature drop to 75 ℃ from 90 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010142324 CN101804299A (en) | 2010-04-09 | 2010-04-09 | Dry type desulfurizing, spraying and humidifying device and spraying and humidifying method |
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| CN 201010142324 CN101804299A (en) | 2010-04-09 | 2010-04-09 | Dry type desulfurizing, spraying and humidifying device and spraying and humidifying method |
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| CN101804299A true CN101804299A (en) | 2010-08-18 |
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| CN 201010142324 Pending CN101804299A (en) | 2010-04-09 | 2010-04-09 | Dry type desulfurizing, spraying and humidifying device and spraying and humidifying method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200499A (en) * | 2011-04-26 | 2011-09-28 | 江苏省电力设计院 | Device for measuring temperature and humidity of flue gas in spraying equipment |
| CN104197353A (en) * | 2014-09-18 | 2014-12-10 | 成都市蜀科科技有限责任公司 | Method for preventing flue from being scalded when water mist is sprayed on flue |
| CN104870379A (en) * | 2012-10-23 | 2015-08-26 | 巴布科克和威尔科克斯能量产生集团公司 | System and method for controlling scale build-up in a wfgd |
| CN106268153A (en) * | 2016-10-13 | 2017-01-04 | 成都赋阳技术开发有限公司 | A kind of energy filtering dust and the air circulating purification system of microgranule |
| CN106268152A (en) * | 2016-10-13 | 2017-01-04 | 成都赋阳技术开发有限公司 | A kind of industrial plant air circulating-dedusting system |
| CN106310864A (en) * | 2016-10-13 | 2017-01-11 | 成都赋阳技术开发有限公司 | Industrial air filtration and purification device |
| CN106310865A (en) * | 2016-10-13 | 2017-01-11 | 成都赋阳技术开发有限公司 | Air purifying and dust-removing system for power plant workshop |
| CN107413181A (en) * | 2017-08-31 | 2017-12-01 | 山东瑞嘉通风环保科技有限公司 | A kind of regeneration fume from catalytic cracking dry type desulfurizing denitration dust removal system |
| CN113926306A (en) * | 2021-09-29 | 2022-01-14 | 北京星然科技有限公司 | Calcium-based desulfurization system and method for coking coal-charging coke-pushing dust-removal flue gas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1398660A (en) * | 2001-07-24 | 2003-02-26 | 北京现代绿源环保技术有限公司 | Semi-wet flue gas desulfurizing treatment method and system |
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2010
- 2010-04-09 CN CN 201010142324 patent/CN101804299A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1398660A (en) * | 2001-07-24 | 2003-02-26 | 北京现代绿源环保技术有限公司 | Semi-wet flue gas desulfurizing treatment method and system |
Non-Patent Citations (1)
| Title |
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| 《环境工程》 20060401 石应杰等 半干半湿法烟气脱硫雾化增湿设计 31-33 1-2 第24卷, 第2期 2 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200499A (en) * | 2011-04-26 | 2011-09-28 | 江苏省电力设计院 | Device for measuring temperature and humidity of flue gas in spraying equipment |
| CN102200499B (en) * | 2011-04-26 | 2012-10-10 | 江苏省电力设计院 | Device for measuring temperature and humidity of flue gas in spraying equipment |
| CN104870379A (en) * | 2012-10-23 | 2015-08-26 | 巴布科克和威尔科克斯能量产生集团公司 | System and method for controlling scale build-up in a wfgd |
| CN104197353A (en) * | 2014-09-18 | 2014-12-10 | 成都市蜀科科技有限责任公司 | Method for preventing flue from being scalded when water mist is sprayed on flue |
| CN106268153A (en) * | 2016-10-13 | 2017-01-04 | 成都赋阳技术开发有限公司 | A kind of energy filtering dust and the air circulating purification system of microgranule |
| CN106268152A (en) * | 2016-10-13 | 2017-01-04 | 成都赋阳技术开发有限公司 | A kind of industrial plant air circulating-dedusting system |
| CN106310864A (en) * | 2016-10-13 | 2017-01-11 | 成都赋阳技术开发有限公司 | Industrial air filtration and purification device |
| CN106310865A (en) * | 2016-10-13 | 2017-01-11 | 成都赋阳技术开发有限公司 | Air purifying and dust-removing system for power plant workshop |
| CN107413181A (en) * | 2017-08-31 | 2017-12-01 | 山东瑞嘉通风环保科技有限公司 | A kind of regeneration fume from catalytic cracking dry type desulfurizing denitration dust removal system |
| CN113926306A (en) * | 2021-09-29 | 2022-01-14 | 北京星然科技有限公司 | Calcium-based desulfurization system and method for coking coal-charging coke-pushing dust-removal flue gas |
| CN113926306B (en) * | 2021-09-29 | 2023-10-20 | 北京星然科技有限公司 | Calcium-based desulfurization system and method for coking coal-charging coke-pushing dust-removing flue gas |
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Application publication date: 20100818 |