CN100372596C - Method and device for removing coal fire discharged absorptive particles and precursor thereof - Google Patents
Method and device for removing coal fire discharged absorptive particles and precursor thereof Download PDFInfo
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- CN100372596C CN100372596C CNB2005100111611A CN200510011161A CN100372596C CN 100372596 C CN100372596 C CN 100372596C CN B2005100111611 A CNB2005100111611 A CN B2005100111611A CN 200510011161 A CN200510011161 A CN 200510011161A CN 100372596 C CN100372596 C CN 100372596C
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Abstract
The utility model relates to a method and a device for removing absorptive particles and precursors thereof discharged by burning coal, which relates to the technical field of fume purification and dust removal. The device of the present invention has the structure that a Laval nozzle capable of accelerating fume is arranged on the inlet end of the bottom of a fluid bed reactor, and the bottom end of the Laval nozzle is connected with a fume inlet pipe; a lime powder inlet and an iron flyash inlet are respectively arranged on the fluid bed reactor from bottom to top, and the upper part of the fluid bed reactor is provided with a fume outlet connected with a bag type dust collector through a connecting pipe; an active carbon inlet is arranged on the connecting pipe, a gas purifying outlet connected with a draught fan is arranged above the bag type dust collector, and an air chute which can cause materials to circulate is arranged below the bag type dust collector and arranged in the fluid bed reactor. The method of the present invention can remove absorptive particles and precursors of a plurality of kinds of secondary pollutants in a cooperation mode. The device realizing the method has the advantages of simple structure, small ground occupation, low cost, safe and reliable operation and convenient operation.
Description
Technical field
The present invention relates to gas cleaning and dedusting technology field, particularly to the removal methods and the device of coal fire discharged pellet and presoma thereof.
Background technology
Discharged flue gas contains a large amount of pernicious gases in the industrial processes, especially not only contains a large amount of primary particulates in the flue gas that burning produces, and contains SO
2, organic pollution such as NOx, heavy metal and polycyclic aromatic hydrocarbon the presoma of secondary pollution also a large amount of enter atmosphere with flue gas, the control problem of pellet PM10 and PM2.5 also is subjected to paying close attention to more widely gradually.Along with the proposition of the mankind to more harmful components control criterions in the ambient air, the air contaminant treatment solution that proposes general equilibrium is imperative.
At removing of multiple pernicious gas in the flue gas, and the control of pellet, existing flue gas purification system generally is made up of a plurality of parts, is controlled respectively at different pollutants by each several part.This flue gas purification system exists inevitably that occupation area of equipment is big, cost of investment is high, the shortcoming of complicated operation, and does not relate to removing the presoma of multiple secondary pollution.
Summary of the invention
At existing above-mentioned problems of the prior art, the purpose of this invention is to provide the removal methods and the device of a kind of coal fire discharged absorptive particles and presoma thereof.This method can remove the presoma of pellet and multiple secondary pollution is collaborative, realizes that the apparatus structure of this method is simple, floor space is little, cost is lower, safe and reliable to operation, easy to operate.The present invention is convenient to the transformation of existing apparatus and is easy to promote.
In order to realize above-mentioned goal of the invention, technical scheme of the present invention realizes as follows:
The removal methods of a kind of coal fire discharged absorptive particles and presoma thereof the steps include:
1. the flue gas that comes out by combustion apparatus via smoke inlet pipe and de Laval noz(zle) after, quicken to enter in the fluidized-bed reactor;
2. particle in the flue gas and gas flue gas fully contact with the lime powder that is sprayed into by lime powder inlet in fluidized-bed reactor, enter the higher fluidized state of flow velocity together, further mix with the iron ash that sprays into by the iron ash inlet simultaneously, under fluidized state, conduct heat fully and mass transfer;
Mix with the active carbon that sprays into by the active carbon inlet when 3. abundant reacted fluidisation material passes through tube connector, enter in the sack cleaner;
4. powder removes the agent layer attached to forming one deck on the filtrate of sack cleaner, and primary particulate that is not removed in continuation and the flue gas and the reaction of the presoma of second particle thing are further removed;
5. sack cleaner is carried out deashing control, be eliminated to ash bucket, by air flume the circulation powder is back in the fluidized-bed reactor and recycles attached to the powder on the filtrate.
In above-mentioned removal methods, the straying quatity of described adsorbent lime powder, iron ash and active carbon can be controlled respectively according to the situation that inlet flue gas detects.
Realize the device of above-mentioned removal methods, it comprises that removing agent with the calcium base is fluidized-bed reactor and the sack cleaner that bed is expected.Its design feature is, described fluidized-bed reactor bottom inlet end is provided with the de Laval noz(zle) of the thick hyperbola round tube shape in thin two ends, centre that flue gas is quickened, and the bottom and the smoke inlet pipe of de Laval noz(zle) join.Fluidized-bed reactor is respectively equipped with lime powder inlet and iron ash inlet from bottom to top, and fluidized-bed reactor top is that exhanst gas outlet joins by tube connector and sack cleaner, and the active carbon inlet is set on the tube connector.The sack cleaner top is provided with the purified gas outlet that links to each other with air-introduced machine, and the sack cleaner below is equipped with in the air flume and incoming stream fluidized bed reactor that can make the material circulation.
In said apparatus, the reaction medium of described sack cleaner adopts coated filter material.
The present invention compared with prior art has the following advantages and good effect:
(1) on the basis of conventional dry fluidized-bed reactor flue gases purification, the agent that removes that utilization contains iron ash, active carbon and lime powder participates in smoke reaction, not only remove acidic gas in flue gas, the while is for the presoma such as the SO of pellet PM10 and PM2.5 and secondary pollution
2, NOx, VOCs and heavy metal steam etc. has the cooperation-removal effect.Make this apparatus structure simply compact simultaneously, saved fund and floor space, gas cleaning is effective, satisfies environmental requirement.
(2) be provided with on fluidized-bed reactor and the flue and a plurality ofly remove agent and spray into a little, can better change and carry out suitable adjusting, comprise the adjusting that removes the agent straying quatity and spray into composition according to the situation in the different phase fluidized-bed reactor.
(3) utilize sack cleaner to carry out the work of gas solid separation and dedusting two aspects, made full use of the structure and the dedusting characteristics of sack cleaner, also further react place and the matrix that provides good simultaneously for the gas that removes in agent and the flue gas.
(4) adopt the reaction medium of coated filter material as sack cleaner.The structure of coated filter material and character help the carrying out with correlated response of adhering to of adsorbent, have improved removal efficiency greatly.
(5) introducing of air flume, the cyclic utilization rate that makes powdery remove agent is improved, and has reduced the operating cost of whole system.
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Accompanying drawing is the structure principle chart of apparatus of the present invention.
The specific embodiment
Referring to accompanying drawing, apparatus of the present invention comprise that removing agent with the calcium base is the fluidized-bed reactor 5 of bed material and the sack cleaner 8 that adopts coated filter material.Fluidized-bed reactor 5 bottom inlet ends are provided with the de Laval noz(zle) 2 of the thick hyperbola round tube shape in thin two ends, centre that flue gas is quickened, and the bottom of de Laval noz(zle) 2 and smoke inlet pipe 1 join.Fluidized-bed reactor 5 is respectively equipped with lime powder inlet 3 and iron ash inlet 4 from bottom to top, and fluidized-bed reactor 5 tops are that exhanst gas outlet joins by tube connector 7 and sack cleaner 8, and active carbon inlet 6 is set on the tube connector 7.Sack cleaner 8 tops are provided with the purified gas outlet 10 that links to each other with air-introduced machine, and its below is equipped with in the air flume 9 and incoming stream fluidized bed reactor 5 that can make the material circulation.
Step during this device operation is:
1. the flue gas that comes out by combustion apparatus via smoke inlet pipe 1 and de Laval noz(zle) 2 after, quicken to enter fluidized-bed reactor 5.
2. particle in the flue gas and gas flue gas fully contact in fluidized-bed reactor 5 with by the lime powder inlet 3 lime powders that spray into, and enter the higher fluidized state of flow velocity together.Simultaneously, the iron ash on fluidized-bed reactor 5 tops inlet 4 also sprays into a certain amount of iron ash in recycle stock, further mixes with other material under the fluidized state of having mixed, conducts heat fully and mass transfer under fluidized state.Chemical reaction and physical absorption are carried out simultaneously in this process, and some can participate in chemical reaction such as SO in the flue gas
2, NOx and CO
2Remove by chemical method Deng the sour gas harmful substance; Presoma materials such as other harmful substances such as PM10, PM2.5 and heavy metal element are owing to fully contact with removing agent, and its character depends on the physical characteristic that removes agent, and removes from flue gas.
3. finish fully chemical reaction and physical absorption in fluidized-bed reactor 5 after, the fluidisation material enters sack cleaner 8 after 6 active carbons that spray into mix with being entered the mouth by active carbon during via tube connector 7.
4. powder further on the filtrate attached to sack cleaner 8, forms one deck and removes the agent layer, continue with flue gas in the primary particulate that is not removed and the presoma reaction of second particle thing, reach the effect that further removes.
5. sack cleaner 8 is carried out deashing control, be eliminated to ash bucket, the circulation powder is back in the fluidized-bed reactor 5 according to certain reflux ratio by air flume 9 and recycles attached to the powder on the filtrate.
In subtractive process of the present invention, the situation that can detect according to inlet flue gas is at any time controlled the straying quatity of lime powder, iron ash and active carbon respectively.
Facts have proved that apparatus of the present invention desulfurization, nitric efficiency greater than 90%, reach more than 95% for PM10 and its extrusion rate of PM2.5 level pellet for organic removal efficiencies such as heavy metal, polycyclic aromatic hydrocarbons greater than 70%.
Claims (4)
1. the removal methods of coal fire discharged absorptive particles and presoma thereof the steps include:
1. the flue gas that comes out by combustion apparatus via smoke inlet pipe and de Laval noz(zle) after, quicken to enter in the fluidized-bed reactor;
2. particle in the flue gas and gas flue gas fully contact with the lime powder that is sprayed into by lime powder inlet in fluidized-bed reactor, enter the higher fluidized state of flow velocity together, further mix with the iron ash that sprays into by the iron ash inlet simultaneously, under fluidized state, conduct heat fully and mass transfer;
Mix with the active carbon that sprays into by the active carbon inlet when 3. abundant reacted fluidisation material passes through tube connector, enter in the sack cleaner;
4. powder removes the agent layer attached to forming one deck on the filtrate of sack cleaner, and primary particulate that is not removed in continuation and the flue gas and the reaction of the presoma of second particle thing are further removed;
5. sack cleaner is carried out deashing control, be eliminated to ash bucket, by air flume the circulation powder is back in the fluidized-bed reactor and recycles attached to the powder on the filtrate.
2. according to the removal methods of described coal fire discharged absorptive particles of claim 1 and presoma thereof, it is characterized in that the straying quatity of described adsorbent lime powder, iron ash and active carbon can be controlled respectively according to the situation that inlet flue gas detects.
3. realize the device of the removal methods of described coal fire discharged absorptive particles of claim 1 and presoma thereof, it comprises that removing agent with the calcium base is fluidized-bed reactor (5) and the sack cleaner (8) that bed is expected, it is characterized in that, described fluidized-bed reactor (5) bottom inlet end is provided with the de Laval noz(zle) (2) of the thick hyperbola round tube shape in thin two ends, centre that flue gas is quickened, the bottom of de Laval noz(zle) (2) and smoke inlet pipe (1) join, fluidized-bed reactor (5) is respectively equipped with lime powder inlet (3) and iron ash inlet (4) from bottom to top, fluidized-bed reactor (5) top is that exhanst gas outlet passes through tube connector (7) and sack cleaner (8) joins, active carbon inlet (6) is set on the tube connector (7), sack cleaner (8) top is provided with the purified gas outlet (10) that links to each other with air-introduced machine, and sack cleaner (8) below is equipped with in the air flume (9) and incoming stream fluidized bed reactor (5) that can make the material circulation.
4. according to the device that removes of coal fire discharged absorptive particles described in the claim 3 and presoma thereof, it is characterized in that the reaction medium of described sack cleaner (8) adopts coated filter material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100111611A CN100372596C (en) | 2005-01-13 | 2005-01-13 | Method and device for removing coal fire discharged absorptive particles and precursor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100111611A CN100372596C (en) | 2005-01-13 | 2005-01-13 | Method and device for removing coal fire discharged absorptive particles and precursor thereof |
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| Publication Number | Publication Date |
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| CN1803260A CN1803260A (en) | 2006-07-19 |
| CN100372596C true CN100372596C (en) | 2008-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100111611A Active CN100372596C (en) | 2005-01-13 | 2005-01-13 | Method and device for removing coal fire discharged absorptive particles and precursor thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105597491A (en) * | 2015-11-13 | 2016-05-25 | 福建南方路面机械有限公司 | Flue gas treatment device and method for asphalt stirring system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4980138A (en) * | 1990-05-14 | 1990-12-25 | Shell Oil Company | Removal of SOx and NOx gases from flue gas by dry absorption using an absorbent |
| US6270631B1 (en) * | 1997-12-15 | 2001-08-07 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Natural Resources | Method for conditioning fluidised bed combustor ashes |
| CN1391979A (en) * | 2002-06-17 | 2003-01-22 | 北京科技大学 | Flue gas desulfuring method and its device for density current fluidised bed |
| CN1401411A (en) * | 2002-09-17 | 2003-03-12 | 山东大学 | Compound desulfurizing process of circulating fluidized bed boiler |
| CN1520380A (en) * | 2001-03-13 | 2004-08-11 | Ĭ��ר������˾ | Method for producing multinary metal oxide powders in pulsed reactor |
-
2005
- 2005-01-13 CN CNB2005100111611A patent/CN100372596C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4980138A (en) * | 1990-05-14 | 1990-12-25 | Shell Oil Company | Removal of SOx and NOx gases from flue gas by dry absorption using an absorbent |
| US6270631B1 (en) * | 1997-12-15 | 2001-08-07 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Natural Resources | Method for conditioning fluidised bed combustor ashes |
| CN1520380A (en) * | 2001-03-13 | 2004-08-11 | Ĭ��ר������˾ | Method for producing multinary metal oxide powders in pulsed reactor |
| CN1391979A (en) * | 2002-06-17 | 2003-01-22 | 北京科技大学 | Flue gas desulfuring method and its device for density current fluidised bed |
| CN1401411A (en) * | 2002-09-17 | 2003-03-12 | 山东大学 | Compound desulfurizing process of circulating fluidized bed boiler |
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| CN1803260A (en) | 2006-07-19 |
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Owner name: QINGHUA UNIVERSITY; TONGFANG ENVIRONMENT CO. Free format text: FORMER OWNER: QINGHUA UNIVERSITY; TONGFANG ENVIRONMENT CO.; TONGFANG CO., LTD. Effective date: 20080516 |
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Owner name: QINGHUA UNIVERSITY; TONGFANG ENVIRONMENT CO.; TONG Free format text: FORMER NAME OR ADDRESS: QINGHUA UNIVERSITY; TSINGHUA TONGFANG ENVIRONMENT CO., LTD.; TONGFANG CO., LTD. |
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Address after: A, Tsinghua Tongfang science and Technology Square, Beijing 2907, postcode: 100083 Co-patentee after: TONGFANG ENVIRONMENT Co.,Ltd. Patentee after: TSINGHUA University Co-patentee after: Tongfang Co.,Ltd. Address before: A, Tsinghua Tongfang science and Technology Square, Beijing 2907, postcode: 100083 Co-patentee before: Tsinghua Tongfang Environment Co.,Ltd. Patentee before: Tsinghua University Co-patentee before: Tongfang Co.,Ltd. |
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Effective date of registration: 20080516 Address after: A, Tsinghua Tongfang science and Technology Square, Beijing 2907, postcode: 100083 Co-patentee after: TONGFANG ENVIRONMENT Co.,Ltd. Patentee after: TSINGHUA University Address before: A, Tsinghua Tongfang science and Technology Square, Beijing 2907, postcode: 100083 Co-patentee before: TONGFANG ENVIRONMENT Co.,Ltd. Patentee before: Tsinghua University Co-patentee before: Tongfang Co.,Ltd. |