CN1624380A - Separation device of storehouse type powdered coal boiler powder making system powder sending air laeking - Google Patents
Separation device of storehouse type powdered coal boiler powder making system powder sending air laeking Download PDFInfo
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- CN1624380A CN1624380A CN 200410009997 CN200410009997A CN1624380A CN 1624380 A CN1624380 A CN 1624380A CN 200410009997 CN200410009997 CN 200410009997 CN 200410009997 A CN200410009997 A CN 200410009997A CN 1624380 A CN1624380 A CN 1624380A
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- pulverized
- coal
- laeking
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Abstract
A storage pulverized-fuel boiler powder making system, which uses disequilibrium of the beta distribution of the breeze to divide the dead steam into two parts, which are thick and thin. They are caught into the furnace cavity through the wind ejector nozzle once and twice. It is simple, which doesn't need the collector.
Description
Technical field
The present invention relates to a kind of separator of store in a warehouse pulverized coal preparation system hot blast or warm wind powder sending air laeking, belong to storage type pulverized coal fired boiler pulverized coal preparation system and field of combustion technology.
Background technology
Storage type pulverized coal fired boiler is used more in China coal-burning power plant at present, the structure of this boiler milling system as shown in Figure 1, in this system, contain 10%～20% the coal dust of having an appointment in the weary gas that comes out by pulverized-coal collector 3, so this part weary gas is generally sent in the boiler furnace 8 by tertiary air spout 7 as tertiary air, but when utilizing colm to make fuel, problems such as unburned carbon in flue dust height and NOx discharge capacity height often appear in this boiler, the existing environmental protection policy of this and China is not inconsistent, and therefore is necessary this pulverized coal preparation system is transformed.
Have at present the people to propose modification scheme to this system in the prior art, for example provided two kinds of modification schemes in the article " utilizing the thin powder recombustion of tertiary air to reduce the Several Key Problems analysis of NOx " that Xu Zhang etc. is delivered on " thermal power generation " 2003 the 9th phases: the structure of scheme one as shown in Figure 2.This scheme is between pulverized-coal collector 3 outlets and Powder discharging fan 4 a superfine powder gatherer 9 to be installed, the fine powder of separating is by sending into the burner hearth 8 through reburning fuel spout 10 from the flue gas that boiler tail extracts by fume pipe 12, and the air-flow after separating is then sent in the burner hearth 8 by after-flame wind snout 11 by Powder discharging fan 4.The structure of scheme two as shown in Figure 3, it is that Powder discharging fan 4 to burner hearth 8 middle airducts are transformed, promptly utilize a threeway that airduct is divided into two parts up and down, the pipe of being in the wind is gone up a superfine powder gatherer 9 is installed, the fine powder of separating is sent in the burner hearth 8 by reburning fuel spout 10 as reburning fuel, and the air-flow after separating is sent in the burner hearth 8 by after-flame wind snout 11 as after-flame wind.But the deficiency of these two schemes is: the weary gas that separator on the one hand comes out for pulverized-coal collector is difficult to effectively separate again; Secondly transform on each root airduct in scheme two, the structure relative complex has increased investment cost; Increase the air current flow resistance simultaneously, also just increased operating cost.
Summary of the invention
At the deficiencies in the prior art and defective, the objective of the invention is to propose a kind of new storage pulverized coal preparation system hot blast or the separator of warm wind powder sending air laeking, to overcome the separation difficulty that exists in the such scheme, expense than problems such as height, this device discharging that can effectively reduce the boiler fly ash carbon content and reduce NOx simultaneously.
Technical scheme of the present invention is as follows:
A kind of separator of storage type pulverized coal fired boiler pulverized coal preparation system powder sending air laeking, comprise pulverized-coal collector, the Powder discharging fan that links to each other with the pulverized-coal collector gas vent, a wind that is arranged on the Pulverized Coal Bin of pulverized-coal collector bottom and links to each other with this Pulverized Coal Bin is gone into pipe, it is characterized in that: the outlet of described Powder discharging fan is divided into dense powder outlet and the outlet of rare powder, and described dense powder outlet links to each other with an airduct of boiler by dense tube cell; Described rare powder outlet by rare tube cell and boiler secondary air channel link to each other.
The present invention compared with prior art, have the following advantages and the high-lighting effect: structure of the present invention is very simple, do not need to be provided with the superfine powder gatherer, the inhomogeneities of directly utilizing power plant's Powder discharging fan outlet dust concentration to distribute, exit flow is divided into deep or light two parts, the air-flow of these two parts is respectively as the wind and the secondary wind of boiler, thereby solved the tertiary air that is provided with that occurs in the combustion of storage type pulverized coal fired boiler process, caused problems such as unburned carbon in flue dust height, NOx discharge capacity height and improvement expenses and operating cost height.
Description of drawings
Fig. 1, Fig. 2, Fig. 3 are respectively the structural representation of storage type pulverized coal fired boiler powder sending air laeking system in the prior art.
Fig. 4 is the structural representation of storage type pulverized coal fired boiler pulverized coal preparation system powder sending air laeking separator provided by the invention.
Among the figure: 1. an airduct, 2. Pulverized Coal Bin, 3. pulverized-coal collector, 4. blower fan, 5. a wind snout, 6. overfire air port, 7. tertiary air spout, 8. boiler furnace, 9. superfine powder gatherer, 10. reburning fuel spout, 11. the after-flame wind snout, 12. fume pipes, 13. dense tube cells, 14. rare tube cells.
The specific embodiment
Below in conjunction with drawings and Examples concrete structure of the present invention, principle and the course of work are described further.
Fig. 4 is the structural representation of storage type pulverized coal fired boiler pulverized coal preparation system powder sending air laeking separator provided by the invention.Comprise pulverized-coal collector 3, the Powder discharging fan 4 that links to each other with the pulverized-coal collector gas vent, an airduct 1 that is arranged on the Pulverized Coal Bin 2 of pulverized-coal collector bottom and links to each other with this Pulverized Coal Bin.Coal dust contained in the weary gas that is come out by pulverized-coal collector 3 is in the Powder discharging fan 4 impeller processes of rotation at a high speed of flowing through, because action of centrifugal force, the air-flow CONCENTRATION DISTRIBUTION that contains coal dust in the exit of blower fan is no longer even, separation has taken place, utilize this inhomogeneities, the exit gas of blower fan is divided into deep or light two parts, the outlet that is about to Powder discharging fan is divided into dense powder outlet and the outlet of rare powder, dense powder outlet links to each other with an airduct 1 of boiler by dense tube cell 13, sends into boiler furnace 8 through a wind snout 5; Rare powder outlet links to each other with the secondary air channel of boiler by rare tube cell 14, sends into boiler furnace 8 with boiler secondary air through overfire air port 6.
Claims (1)
1. the separator of pulverized-coal fired boiler storage pulverized coal preparation system powder sending air laeking, comprise pulverized-coal collector (3), the Powder discharging fan (4) that links to each other with the pulverized-coal collector gas vent, be arranged on the Pulverized Coal Bin (2) of pulverized-coal collector bottom and an airduct (1) that links to each other with this Pulverized Coal Bin, it is characterized in that: the outlet of described Powder discharging fan (4) is divided into dense powder outlet and the outlet of rare powder, and described dense powder outlet links to each other with an airduct (1) of boiler by dense tube cell; Described rare powder outlet links to each other with the secondary air channel of boiler by rare tube cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100099973A CN1299047C (en) | 2004-12-10 | 2004-12-10 | Separation device of storehouse type powdered coal boiler powder making system powder sending air laeking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100099973A CN1299047C (en) | 2004-12-10 | 2004-12-10 | Separation device of storehouse type powdered coal boiler powder making system powder sending air laeking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1624380A true CN1624380A (en) | 2005-06-08 |
| CN1299047C CN1299047C (en) | 2007-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100099973A Expired - Fee Related CN1299047C (en) | 2004-12-10 | 2004-12-10 | Separation device of storehouse type powdered coal boiler powder making system powder sending air laeking |
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| CN (1) | CN1299047C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782237A (en) * | 2010-03-09 | 2010-07-21 | 西安热工研究院有限公司 | Medium-speed coal-mill direct-firing pulverizing combustion system for burning high-moisture lignite |
| CN103697465A (en) * | 2012-09-27 | 2014-04-02 | 烟台龙源电力技术股份有限公司 | Boiler capable of achieving reignition of exhaust gas coal powder and reducing NOx by using high-temperature flue gas |
| CN104390227A (en) * | 2014-11-19 | 2015-03-04 | 中节环（北京）环境科技股份有限公司 | Device with pulverized coal separator between coal mill and burner |
| CN104406188A (en) * | 2014-11-19 | 2015-03-11 | 中节环（北京）环境科技股份有限公司 | Device for respectively conveying pulverized coal particles in different sizes |
| CN104848243A (en) * | 2015-05-04 | 2015-08-19 | 浙江大学 | Semi-exhaust-gas powder delivery method adopting middle storage type pulverizing system and boiler |
| CN105465772A (en) * | 2015-04-28 | 2016-04-06 | 无锡华光锅炉股份有限公司 | Tertiary-air staged combustion device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100570215C (en) * | 2007-09-10 | 2009-12-16 | 中电投远达环保工程有限公司 | Storehouse type coal-burning boiler few-oil ignition combustion system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3902462A (en) * | 1974-05-28 | 1975-09-02 | Foster Wheeler Energy Corp | System and method for generating heat utilizing fluidized beds of different particle size |
| JPS6021282B2 (en) * | 1978-07-06 | 1985-05-27 | 三菱重工業株式会社 | Powder fuel combustion method |
| JPH0560304A (en) * | 1991-08-28 | 1993-03-09 | Mitsubishi Heavy Ind Ltd | Petroleum/coke burning boiler |
| CN2539908Y (en) * | 2002-03-29 | 2003-03-12 | 浙江大学 | Three air-blowing concentrated reburning NOx-reducing discharge device |
-
2004
- 2004-12-10 CN CNB2004100099973A patent/CN1299047C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782237A (en) * | 2010-03-09 | 2010-07-21 | 西安热工研究院有限公司 | Medium-speed coal-mill direct-firing pulverizing combustion system for burning high-moisture lignite |
| CN103697465A (en) * | 2012-09-27 | 2014-04-02 | 烟台龙源电力技术股份有限公司 | Boiler capable of achieving reignition of exhaust gas coal powder and reducing NOx by using high-temperature flue gas |
| CN104390227A (en) * | 2014-11-19 | 2015-03-04 | 中节环（北京）环境科技股份有限公司 | Device with pulverized coal separator between coal mill and burner |
| CN104406188A (en) * | 2014-11-19 | 2015-03-11 | 中节环（北京）环境科技股份有限公司 | Device for respectively conveying pulverized coal particles in different sizes |
| CN105465772A (en) * | 2015-04-28 | 2016-04-06 | 无锡华光锅炉股份有限公司 | Tertiary-air staged combustion device |
| CN104848243A (en) * | 2015-05-04 | 2015-08-19 | 浙江大学 | Semi-exhaust-gas powder delivery method adopting middle storage type pulverizing system and boiler |
| CN104848243B (en) * | 2015-05-04 | 2018-06-01 | 浙江大学 | A kind of half transporting pulverized coal with exhaust gas method and boiler using intermediate storage-type pulverized coal preparation system |
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| Publication number | Publication date |
|---|---|
| CN1299047C (en) | 2007-02-07 |
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Granted publication date: 20070207 Termination date: 20161210 |