CN101446416A - Thermal power plant boiler tail flue gas dust removal and desulfurization treatment process and device thereof - Google Patents
Thermal power plant boiler tail flue gas dust removal and desulfurization treatment process and device thereof Download PDFInfo
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- CN101446416A CN101446416A CNA2007102027032A CN200710202703A CN101446416A CN 101446416 A CN101446416 A CN 101446416A CN A2007102027032 A CNA2007102027032 A CN A2007102027032A CN 200710202703 A CN200710202703 A CN 200710202703A CN 101446416 A CN101446416 A CN 101446416A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The invention discloses an alumina plant self supply thermal power plant boiler tail flue gas dust removal and desulfurization treatment process and a device thereof. High-temperature flue gas coming from the boiler tail enters an electrostatic precipitator (1) for dust pre-removal; the flue gas experiencing pre-removal enters an NID reactor (3) by a flue gas distributor (2) and then contacts and reacts with the flying ash which is humidified by a humidifier (7) and the lime mix powder which is activated by a digester (8). The flue gas which is treated by the NID reactor (3) enters a bag filter (4) for further removing the dust in the flue gas and then enters into a chimney by a fan (16) after achieving the environmental-protection emission standards, and finally is discharged into the atmosphere. As a special equipment alcohol ID reactor which uses a cycle semi-dry process in which the dust removal and the desulfurization are carried out simultaneously is used in the treatment process, the invention not only has the advantages of better treatment effect, relatively simple technology system, space conservation, and investment reduction, but also causes the auxiliary products to be comprehensively used, achieves the environmental-protection emission requirements, enables the wastes discharged by the boiler to be used again, thus having relatively high economic value and social benefits.
Description
Technical field:
The present invention relates to a kind of alumina producer boiler and treatment process, the particularly treatment process of alumina producer boiler tail flue gas dust removal and desulfurization and device.
Background technology:
In a lot of processing factories' (as alumina producer), auxiliary construction self-contained thermoelectric plant all usually.One of capital equipment of steam power plant is a boiler.The main fuel of boiler is a large amount of coal, coal with air mixed combustion process in can produce the flue gas contain dust and sulfur dioxide in a large number.According to environmental protection requirement, dust and sulfur dioxide all must reach relevant criterion through processing and could discharge.In steam power plant in the past, the way that often adopts dedusting and desulfurization to handle respectively.Dust collection method has: cyclone dust removal, granite water film dust, electrostatic precipitation and bag-type dust etc., sulfur method has: the desulfurization of lime stone gypsum wet, semi-dry desulphurization, flue gas circulating fluidized bed method desulfurization, the desulfurization of seawater method, electronic beam method desulfurization and the desulfurization of ammonia scrubbing method etc.Above several method respectively has pluses and minuses, and the probability that granite water film dust efficient is low, cyclone dust removal is broken down is big, maintenance work is frequent; That the desulfurization of lime stone gypsum wet is taken up an area of is big, investment and station service height, and seawater method desulfuration efficiency is lower, marine environment is had certain influence, electronic beam method desulfurization energy consumption height, and ammonia scrubbing method sulfur removal technology complexity, byproduct are difficult for handling.From situations such as occupation of land, process system, investment, treatment effeciency, operation maintenance, adopt a certain method merely, all improper, can not satisfy the requirement of boiler tail flue gas dust removal and desulfurization well.
Summary of the invention:
The technical problem to be solved in the present invention is: treatment process and device that a kind of alumina plant self-contained thermoelectric plant boiler tail flue gas dust removal and desulfurization are provided, in processing procedure, adopt a kind of Zhuan She Bei Tun ID reactor, the cyclic semidry process technology that dedusting and desulfurization are carried out simultaneously, not only treatment effect is better, process system is fairly simple, conserve space, minimizing investment, and byproduct obtains comprehensive utilization, both reached the requirement of environment protection emission, and the discarded object that boiler the is discharged utilization of getting back has higher economic value and social benefit.
The present invention is achieved in that next high-temperature flue gas to boiler tail enters electrostatic precipitator (1) and carries out pre-dedusting, pass through pretreated flue gas and enter NID reactor (3), contact with the lime mixed powder of free flowable flying dust that passes through humidifier (7) humidification and digester (8) activation and react through flue gas distributor (2).Acidic components is wherein absorbed by the alkaline component in the NID reactor immediately, simultaneously, moisture content also obtains evaporation, make flue gas reach the temperature that effective absorption sulfur dioxide needs, the distribution of flue gas, the delivery rate and the humidification water yield of mixed powder are effectively controlled, can be created and reach the required suitable condition of best desulfuration efficiency.The flue gas of handling through NID reactor (3) enters sack cleaner (4), further removes dust in flue gas, and the requirement that reaches environmental emission standard enters atmosphere again after air-introduced machine (16) enters chimney.
Desulfurizing agent (being quick lime) is delivered in the digester (8) by lime frequency conversion screw(-type) feeder (10), lime air locking machine (11) and lime conveying worm (12) by daily warehouse (9) and activates.The average specific surface area of the white lime of fresh digestion enlarges, and has fabulous desulphurization reaction activity.
Electrostatic precipitator (1) and sack cleaner (4) bottom utilize storehouse pump (13) to be delivered to grey storehouse through the collected dry ash of fluidisation Lower Hold (5) and keep in, with automobile dry ash is transported to the stockyard, perhaps deliver to the user of ash comprehensive utilization.
The required compressed air of sack cleaner (4) is provided by air accumulator (14).
Flue gas circulation required drive in NID reactor (3), sack cleaner (4), fluidisation Lower Hold (5), star-like blanking machine (6) and humidifier (7) is provided by fluidisation blower fan (15).
The required water yield in the quicklime slaking process is directly pumped into through water pump (17) by water tank (18) humidifier (7) at flue gas humidification and digester (8).
The present invention compared with prior art, owing in processing procedure, adopt a kind of Zhuan with She Bei Tun ID reactor (being novel integrated desulfurization device), the cyclic semidry process technology that dedusting and desulfurization are carried out simultaneously, not only treatment effect is better, process system is fairly simple, conserve space, minimizing investment, and byproduct obtains comprehensive utilization, both reached the requirement of environment protection emission, and the utilization of getting back of the boiler discarded object of discharging, higher economic value and social benefit had.
Description of drawings:
Fig. 1 is a schematic flow sheet of the present invention.
The specific embodiment:
Embodiments of the invention: all devices of the present invention: electrostatic precipitator 1, flue gas distributor 2, NID reactor 3, sack cleaner 4, fluidisation Lower Hold 5, star-like blanking machine 6, humidifier 7, digester 8, daily warehouse 9, lime frequency conversion screw(-type) feeder 10, lime air locking machine 11, lime conveying worm 12, storehouse pump 13, air accumulator 14, fluidisation blower fan 15, water pump 16, water tank 17 all can directly adopt the finished product of selling on the market or do certainly.During enforcement, come to enter electrostatic precipitator 1 and carry out pre-dedusting to the high-temperature flue gas of boiler tail, pass through pretreated flue gas and enter NID reactor 3, contact with the lime mixed powder of free flowable flying dust that passes through humidifier 7 humidifications and digester 8 activation and react through flue gas distributor 2.The flue gas of handling through NID reactor 3 enters sack cleaner 4, further removes dust in flue gas, and the requirement that reaches environmental emission standard enters atmosphere again after air-introduced machine 16 enters chimney.Electrostatic precipitator 1 and sack cleaner 4 bottoms utilize storehouse pump 13 to be delivered to grey storehouse through fluidisation Lower Hold 5 collected dry ashes and keep in, with automobile dry ash is transported to the stockyard, perhaps deliver to the user of ash comprehensive utilization.Desulfurizing agent (being quick lime) is delivered in the digester 8 by lime frequency conversion screw(-type) feeder 10, lime air locking machine 11 and lime conveying worm 12 by daily warehouse 9 and activates.Sack cleaner 4 required compressed air are provided by air accumulator 14.Flue gas circulation required drive in NID reactor 3, sack cleaner 4, fluidisation Lower Hold 5, star-like blanking machine 6 and humidifier 7 is provided by fluidisation blower fan 15.The required water yield in the quicklime slaking process is directly pumped into through water pump 17 by water tank 18 humidifier 7 at flue gas humidification and digester 8.
Claims (7)
- [claim 1] a kind of alumina plant self-contained thermoelectric plant boiler tail flue gas dust removal and desulfurization treatment process, it is characterized in that: come to enter electrostatic precipitator (1) and carry out pre-dedusting to the high-temperature flue gas of boiler tail, pass through pretreated flue gas and enter NID reactor (3), contact with the lime mixed powder of flying dust that passes through humidifier (7) humidification and digester (8) activation and react through flue gas distributor (2).The flue gas of handling through NID reactor (3) enters sack cleaner (4), further removes dust in flue gas, and the requirement that reaches environmental emission standard enters atmosphere again after air-introduced machine (16) enters chimney.
- [claim 2] alumina plant self-contained thermoelectric plant boiler tail flue gas dust removal according to claim 1 and desulfurization treatment process is characterized in that: desulfurizing agent is delivered in the digester (8) by lime frequency conversion screw(-type) feeder (10), lime air locking machine (11) and lime conveying worm (12) by daily warehouse (9) and activates.
- The device of [claim 3] a kind of alumina plant self-contained thermoelectric plant boiler tail flue gas dust removal as claimed in claim 1 and desulfurization treatment process, it comprises electrostatic precipitator (1), NID reactor (3), it is characterized in that: electrostatic precipitator (1) is connected with NID reactor (3) by flue gas distributor (2), NID reactor (3) upper end connects sack cleaner (4), the lower end connects digester (8) by humidifier (7), and sack cleaner (4) connects air-introduced machine (16).
- The device of [claim 4] alumina plant self-contained thermoelectric plant boiler tail flue gas dust removal according to claim 3 and desulfurization treatment process, it is characterized in that: the bottom of sack cleaner (4) connects fluidisation Lower Hold (5), and fluidisation Lower Hold (5) connects storehouse pump (13); One side of sack cleaner (4) connects air accumulator (14).
- The device of [claim 5] alumina plant self-contained thermoelectric plant boiler tail flue gas dust removal according to claim 3 and desulfurization treatment process is characterized in that: digester (8) connects daily warehouse (9) by lime conveying worm (12), lime air locking machine (11), lime frequency conversion screw(-type) feeder (10).
- The device of [claim 6] alumina plant self-contained thermoelectric plant boiler tail flue gas dust removal according to claim 3 and desulfurization treatment process is characterized in that: NID reactor (3), sack cleaner (4), fluidisation Lower Hold (5), star-like blanking machine (6) and humidifier (7) are connected with fluidisation blower fan (15) by pipeline.
- The device of [claim 7] alumina plant self-contained thermoelectric plant boiler tail flue gas dust removal according to claim 3 and desulfurization treatment process is characterized in that: humidifier (7), digester (8) connect water pump (17) and water tank (18).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007102027032A CN101446416A (en) | 2007-11-27 | 2007-11-27 | Thermal power plant boiler tail flue gas dust removal and desulfurization treatment process and device thereof |
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| CNA2007102027032A CN101446416A (en) | 2007-11-27 | 2007-11-27 | Thermal power plant boiler tail flue gas dust removal and desulfurization treatment process and device thereof |
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| CN101446416A true CN101446416A (en) | 2009-06-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179159A (en) * | 2011-04-06 | 2011-09-14 | 上海晓清环保科技有限公司 | Circulating material moistening and activating process for use in recirculating fluidized bed flue gas desulfurization |
| CN103691302A (en) * | 2013-12-31 | 2014-04-02 | 吕宜德 | Dry desulfurization device and desulfurization method |
| CN103920390A (en) * | 2014-04-17 | 2014-07-16 | 武汉钢铁(集团)公司 | Method for reducing calcium sulfur ratio of NID semi-dry desulfurization process |
| CN104785078A (en) * | 2015-03-18 | 2015-07-22 | 绿能（杭州）企业管理有限公司 | In-furnace calcium spraying furnace rear humidifying activation circulating ash flue gas purification device and purification process |
| CN106215601A (en) * | 2016-09-14 | 2016-12-14 | 广东电网有限责任公司电力科学研究院 | A kind of flue gas demercuration desulfurization dust-removal system and technique |
-
2007
- 2007-11-27 CN CNA2007102027032A patent/CN101446416A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179159A (en) * | 2011-04-06 | 2011-09-14 | 上海晓清环保科技有限公司 | Circulating material moistening and activating process for use in recirculating fluidized bed flue gas desulfurization |
| CN103691302A (en) * | 2013-12-31 | 2014-04-02 | 吕宜德 | Dry desulfurization device and desulfurization method |
| CN103920390A (en) * | 2014-04-17 | 2014-07-16 | 武汉钢铁(集团)公司 | Method for reducing calcium sulfur ratio of NID semi-dry desulfurization process |
| CN103920390B (en) * | 2014-04-17 | 2016-04-20 | 武汉钢铁(集团)公司 | Reduce the method for NID semi-dry desulfurizing process calcium sulfur ratio |
| CN104785078A (en) * | 2015-03-18 | 2015-07-22 | 绿能（杭州）企业管理有限公司 | In-furnace calcium spraying furnace rear humidifying activation circulating ash flue gas purification device and purification process |
| CN104785078B (en) * | 2015-03-18 | 2017-10-03 | 杭州科晟能源技术有限公司 | Humidification activation circulating ash smoke eliminator and its purification technique after in-furnace calcium spraying stove |
| CN106215601A (en) * | 2016-09-14 | 2016-12-14 | 广东电网有限责任公司电力科学研究院 | A kind of flue gas demercuration desulfurization dust-removal system and technique |
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Open date: 20090603 |