CN201389423Y - Flue gas desulphurization dust removing tower for coal burning boiler - Google Patents

Flue gas desulphurization dust removing tower for coal burning boiler Download PDF

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Publication number
CN201389423Y
CN201389423Y CN200920107371U CN200920107371U CN201389423Y CN 201389423 Y CN201389423 Y CN 201389423Y CN 200920107371 U CN200920107371 U CN 200920107371U CN 200920107371 U CN200920107371 U CN 200920107371U CN 201389423 Y CN201389423 Y CN 201389423Y
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CN
China
Prior art keywords
tower
dust
gas
desulphurization
flue
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Expired - Fee Related
Application number
CN200920107371U
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Chinese (zh)
Inventor
卢来印
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BEIJING LIDEHENG ENVIRONMENTAL PROTECTION ENGINEERING CO LTD
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BEIJING LIDEHENG ENVIRONMENTAL PROTECTION ENGINEERING CO LTD
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Priority to CN200920107371U priority Critical patent/CN201389423Y/en
Application granted granted Critical
Publication of CN201389423Y publication Critical patent/CN201389423Y/en
Anticipated expiration legal-status Critical
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Abstract

The utility model relates to a flue gas desulphurization dust removing tower for a coal burning boiler, which belongs to the technical field of flue gas desulphurization dust removal. The dust removing tower comprises a desulphurization demist device, a spraying liquid distribution device, and a fluidifying desulphurization dust removing device and an air evening cooling device. A flue outlet is arranged on a tower body wall on the upper portion of the dust removing tower, a flue inlet is arranged on a tower body wall on the lower portion of the dust removing tower, and a grout inlet is arranged on a tower body wall on the lower portion of the flue inlet. The desulphurization demist device, the spraying liquid distribution device, the fluidifying desulphurization dust removing device and the air evening cooling device are sequentially mounted between the flue outlet on the upper portion inside the tower body and the flue inlet on the lower portion of the tower body from up to down. The dust removing tower utilizes a form combing multi-layer spraying and high-efficient mass transfer components, utilizes a high-efficient fluidifying desulphurization dust removing component as a core, and is additionally equipped with air evening and liquid distribution devices, thereby greatly improving gas and liquid contacting conditions inside the tower, strengthening inter-phase mass transfer, and realizing high-efficient desulphurization under a low liquid-gas ratio. In addition, the flue gas desulphurization dust removing tower is simple in structure without scaling or blocking, and further has a dust removing function.

Description

A kind of fuel gas desulfurization gas wash tower that is used for coal-burning boiler
Technical field
The utility model relates to a kind of fuel gas desulfurization gas wash tower that is used for coal-burning boiler, and particularly a kind of wet method sulphur removing and dust removing tower that fire coal boiler fume is handled that is applicable to belongs to the flue gas desulfurization and dedusting technical field.
Background technology
Coal-burning boiler is the important electric energy of China, thermal powerplant, mainly concentrates on densely populated industrial area, the city proper and the suburbs, generally uses raw coal, and the sulfur dioxide pollution problem is very serious.The sulfur dioxide that purifies in the fire coal boiler fume has number of ways, as solid sulphur, burning back desulfurization in the preceding desulfuration that burns, burning, and wherein burning back desulfur technology is most widely used.Flue gas desulfurization belongs to burning back desulfurization scope, and the branch of dry method and wet method is arranged, and dry flue gas desulphurization is because of complex process, and investment is big, and desulfurization degree is low, uses less.Wet fuel gas desulfurizing technology is simple, and small investment adapts to various sulfur-bearing coals, is the main technique of present middle and small burn coal boiler flue gas desulfurization, and the domestic and international market occupation rate reaches more than 85%, also is the desulfur technology that China is most widely used.Wherein, reaction tower for stack gas desulfurization is a core apparatus of realizing the wet method sulphur removing and dust removing technical performance index.
But at present China in several introduction wet desulphurization technology of usefulness most of liquid-gas ratio at 8L/m 3More than, be 25-26L/m as Chongqing Lopa Nationality sulphur power plant (Mitsubishi technology) 3, Beijing No.1 Heat and Power Plant's (German BISCHOFF technology) is 12.5-19L/m 3Operation pH value is all between 4.5-6.0, notification number is the patent of invention of CN1958132A, by smoke deflector being set and shrinking changeover portion and improve the air-flow distribution situation, effectively stop the abundant mixing of gas-liquid two-phase in the fume desulfurizing tower, realized the high-efficiency desulfurization under the low liquid-gas ratio, its liquid-gas ratio is also at 8-12L/m 3And, continuous strictness along with the environmental protection standard requirement, requirement to the desulfation dust-extraction device desulfuration efficiency improves thereupon, for improving desulfurization dust-removing efficiency, most of desulfurating dust-removing equipment has to take to increase the mode of liquid vapour, and big liquid-gas ratio need consume great amount of water resources, simultaneously, it is huge that pump class power consumption is joined by institute, thereby cause the desulfurization dust-removal system operating cost too high.
Summary of the invention
The purpose of this utility model is to propose a kind of fuel gas desulfurization gas wash tower that is used for coal-burning boiler, changes the structure of existing gas wash tower, realizes high desulfuration efficiency under the condition of low liquid-gas ratio, and reduces operating cost.
The fuel gas desulfurization gas wash tower that is used for coal-burning boiler that the utility model proposes, comprise desulfurization demister, spray liquid distributor, fluidisation desulfation dust-extraction device and even gas heat sink, the tower body wall on gas wash tower top is provided with outlet flue, the tower body wall of gas wash tower bottom is provided with into mouth, and the tower body wall that enters the mouth bottom is provided with slurry inlet; Described desulfurization demister, spray liquid distributor, fluidisation desulfation dust-extraction device and even gas heat sink from top to bottom are installed in tower body internal upper part outlet flue and bottom successively and advance between the mouth; Described spray liquid distributor is provided with the nozzle that is directed downwards, and described even gas heat sink is provided with the slurries nozzle that direction makes progress.
In the above-mentioned fuel gas desulfurization gas wash tower, describedly advance the downward-sloping 10-30 of mouth °.
The fuel gas desulfurization gas wash tower that is used for coal-burning boiler that the utility model proposes, its advantage is:
1, because this wet process of FGD gas wash tower adopts the multilayer spray to add the compound mode of efficient fluidisation desulfurization and dedusting parts, improved the gas-liquid contact area greatly, simultaneously, these desulfurization and dedusting parts have good mass transfer effect, can realize all states of high degree of dispersion of gas-liquid, therefore can hang down (≤3L/m under the liquid-gas ratio 3) realize high desulfuration efficiency (〉=98%), greatly reduce the system water amount, and reduced circulation pump power, reduced system power consumption, greatly reduce operating cost.
2, be provided with equal device of air in the wet process of FGD gas wash tower, add efficient fluidisation desulfurization and dedusting parts, the arrangement form of particular design can make the tower body inner fluid flow evenly, thoroughly eliminated the phenomenon that flue gas that traditional hollow-spraying-tower exists easily is short-circuited, so the desulfurizing tower desulfuration efficiency is stable.
3, efficient fluidisation desulfurization and dedusting modular construction is simple, and no dead angle does not exist in the tower body to do and wetly has a common boundary face, has guaranteed under the correct situation of other technological parameters, the interior non-scaling of desulfurizing tower, does not stop up.
4, the spray pipeline in the wet process of FGD gas wash tower is designed to withdrawablely, can realize not shutdown maintenance when nozzle goes wrong.
Description of drawings
Fig. 1 is the structural representation of the gas wash tower that the utility model proposes.
Among Fig. 1, the 1st, the slurries outlet, the 2nd, the slurries collection section, the 3rd, advance mouth, the 4th, shower, the 5th, the slurries nozzle, the 6th, the fluidisation desulfation dust-extraction device, the 7th, the spray liquid distributor, the 8th, the desulfurization demister, the 9th, the fume emission mouth, 10,11,12,13 is respectively service hatch.
The specific embodiment
The fuel gas desulfurization gas wash tower that is used for coal-burning boiler that the utility model proposes, its structure as shown in Figure 1, comprise desulfurization demister 8, spray liquid distributor 7, fluidisation desulfation dust-extraction device 6 and even gas heat sink 4, the tower body wall on gas wash tower top is provided with outlet flue 9, the tower body wall of gas wash tower bottom is provided with into mouth 3, and the tower body wall that enters mouth 3 bottoms is provided with slurry inlet 1.Top outlet flue 9 and bottom that desulfurization demister 8, spray liquid distributor 7, fluidisation desulfation dust-extraction device 6 and even gas heat sink 4 from top to bottom are installed in the tower body are successively advanced between the mouth 3.Spray liquid distributor 7 is provided with the nozzle that is directed downwards.Even gas heat sink 4 is provided with the slurries nozzle 5 that direction makes progress.
In the above-mentioned fuel gas desulfurization gas wash tower, describedly advance mouth 3 downward-sloping 10-30 °.
Further introduce operation principle of the present utility model below in conjunction with accompanying drawing:
The fuel gas desulfurization gas wash tower structure that the utility model proposes, be cylindrical tube, the cylindrical shell material can be for glass flake anticorrosion or special glass steel, the bottom of cylindrical shell is provided with into mouth, this advances the downward-sloping 10-30 of mouth °, the bottom cylindrical shell also is provided with slurries outlet 1, links to each other with tower outer circulation pond or circulating pump; At middle cylinder fluidisation desulfation dust-extraction device 6 and spray liquid distributor 7 are set, wherein all gas heat sink 4 is made up of the shower and the nozzle 5 of some special arrangement, adopt along spray mode (it is identical with the flow of flue gas direction promptly to spray direction), fluidisation desulfation dust-extraction device 6 is a kind of good gas-liquid mass transfer and dedusting parts.Spray liquid distributor 7 is the desulfurization and dedusting parts, and uniform desulfurization slurry is provided; Be provided with fume emission mouth 9 and desulfurization demister 8 in the cylindrical shell of top.
The upper, middle and lower of cylindrical shell are provided with service hatch 10,11,12 and 13 respectively, but the ruuning situation of each critical section of macroscopic examination; Each shower 4,7 all can be designed to the pullable formula, thereby be implemented under the not blowing out situation shower and nozzle is overhauled.
The process of the utility model smoke treatment is as follows: flue gas is entered by the mouth 3 that advances of bottom cylindrical shell, this advances the downward-sloping 10-30 of mouth °, make flue gas to enter the absorption tower than the low velocity incision, reduced flue-gas temperature at the cylindrical shell middle part, prolonged flow process and the time of staying of flue gas in the absorption tower, guarantee the time of staying of flue gas and evenly distributed raising rear portion desulfurized effect.Through entering efficient fluidisation desulfation dust-extraction device 6 again with the flue gas of handling, when flue gas installs by this, the state that formation gas phase, liquid phase are all disperseed, gas-liquid-solid three-phase is fully contacted and mix, improve absorption efficiency, after after desulfurization demister 8 demists of top cylindrical shell, discharge by fume emission mouth 9.
Slurries in the above-mentioned fuel gas desulfurization gas wash tower, slurries collection section 2 gravity flows bottom tower body enter the outer desulphurization circulating pond of tower or are connected to desulfuration recycle pump.
The mouth that advances of fuel gas desulfurization gas wash tower is provided with spray section before, is provided with the temperature sense interlock simultaneously, when entrance flue gas temperature is higher than uniform temperature, automatically carry out spraying cooling, guarantee to pass through the interior flue-gas temperature of tower less than uniform temperature, simultaneously, advance the downward-sloping 10-30 of mouth °.
In the even gas temperature descending section device of fuel gas desulfurization gas wash tower, arrange the shower and the slurries nozzle 5 of some, adopt along the mode of spray (being that injection direction is identical with the flow of flue gas direction) flue gas is carried out all gas, cooling.Even gas temperature descending section device can adopt the equipment of the LDH-JJ model of being produced by Beijing Lideheng Environmental Engineering Co., Ltd..
In the fuel gas desulfurization gas wash tower of the present utility model, efficient fluidisation desulfation dust-extraction device is modular, and each unit is made up of some foliaceous guiding devices, and direction of rotation is clockwise or counterclockwise.The fluidisation desulfation dust-extraction device can adopt the equipment of the LDH-XP model of being produced by Beijing Lideheng Environmental Engineering Co., Ltd..
Spray liquid distributor described in the utility model can spray for layer 2-3, also arranges the shower and the slurries nozzle of some, adopts the mode of contrary spray (being that injection direction is opposite with the flow of flue gas direction) that desulfurization slurry is distributed in the desulfurization and dedusting parts.The spray liquid distributor can adopt the equipment of the MP model of being produced by Beijing Orient Lian Ya Co., Ltd.
Demist section described in the utility model adopts the traditional eddy flow plate dewatering type or the flap demister of power plant's maturation.Must supporting back purge system when adopting the flap demister.Can adopt the equipment of the LDH-ZB model of producing by Beijing Lideheng Environmental Engineering Co., Ltd..

Claims (2)

1, a kind of fuel gas desulfurization gas wash tower that is used for coal-burning boiler, it is characterized in that this gas wash tower comprises desulfurization demister, spray liquid distributor, fluidisation desulfation dust-extraction device and even gas heat sink, the tower body wall on gas wash tower top is provided with outlet flue, the tower body wall of gas wash tower bottom is provided with into mouth, and the tower body wall that enters the mouth bottom is provided with slurry inlet; Described desulfurization demister, spray liquid distributor, fluidisation desulfation dust-extraction device and even gas heat sink from top to bottom are installed in tower body internal upper part outlet flue and bottom successively and advance between the mouth; Described spray liquid distributor is provided with the nozzle that is directed downwards, and described even gas heat sink is provided with the slurries nozzle that direction makes progress.
2, fuel gas desulfurization gas wash tower as claimed in claim 1 is characterized in that the wherein said downward-sloping 10-30 of mouth of advancing °.
CN200920107371U 2009-04-17 2009-04-17 Flue gas desulphurization dust removing tower for coal burning boiler Expired - Fee Related CN201389423Y (en)

Priority Applications (1)

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CN200920107371U CN201389423Y (en) 2009-04-17 2009-04-17 Flue gas desulphurization dust removing tower for coal burning boiler

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Application Number Priority Date Filing Date Title
CN200920107371U CN201389423Y (en) 2009-04-17 2009-04-17 Flue gas desulphurization dust removing tower for coal burning boiler

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105771477A (en) * 2014-12-22 2016-07-20 中国科学院过程工程研究所 Fluidization atomization-liquid film washing combined flue gas purifying device and method
CN105999936A (en) * 2016-07-07 2016-10-12 无锡市昂益达机械有限公司 Organic solvent leaching device
CN106178845A (en) * 2016-08-18 2016-12-07 金管会 A kind of quiet formula is combined desulfurizing tower
CN109179333A (en) * 2018-09-19 2019-01-11 刘笑菲 A kind of device for producing oxygen from chemical substance

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105771477A (en) * 2014-12-22 2016-07-20 中国科学院过程工程研究所 Fluidization atomization-liquid film washing combined flue gas purifying device and method
CN105771477B (en) * 2014-12-22 2019-03-15 中国科学院过程工程研究所 A kind of fluidisation atomization and liquid film wash combined flue gas purification device and method
CN105999936A (en) * 2016-07-07 2016-10-12 无锡市昂益达机械有限公司 Organic solvent leaching device
CN106178845A (en) * 2016-08-18 2016-12-07 金管会 A kind of quiet formula is combined desulfurizing tower
CN109179333A (en) * 2018-09-19 2019-01-11 刘笑菲 A kind of device for producing oxygen from chemical substance

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100127

Termination date: 20140417

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