CN204165045U - Warm flue gas recirculation coal powder burner in one - Google Patents
Warm flue gas recirculation coal powder burner in one Download PDFInfo
- Publication number
- CN204165045U CN204165045U CN201420483262.3U CN201420483262U CN204165045U CN 204165045 U CN204165045 U CN 204165045U CN 201420483262 U CN201420483262 U CN 201420483262U CN 204165045 U CN204165045 U CN 204165045U
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- flue gas
- air
- gas recirculation
- burner
- pipe
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Abstract
The purpose of this utility model is to provide warm flue gas recirculation coal powder burner in one, comprise burner, described burner, comprises outer second air pipe, First air central tube, axial rotational flow blade is provided with in described outer second air pipe, also comprise air-introduced machine, flue gas recirculation pipe, air-introduced machine one end is connected with boiler back end ductwork, and the other end is connected with flue gas recirculation pipe, described burner also comprises inner second air pipe, and described inner second air pipe air inlet is connected with flue gas recirculation pipe.Solve the current coal burner length duration of ignition for Industrial Boiler, fuel consumption is large, flame holding is poor, and coal adaptability is poor, NO
xthe problem that discharge capacity is large.
Description
Technical field
The utility model belongs to industrial coal powder boiler field of combustion technology, particularly relates to warm flue gas recirculation high stability coal powder burner in one.
Background technology
Up to now, China's coal-burned industrial boiler recoverable amount about 500,000, account for about 85% of Industrial Boiler total amount, be mainly used in the field such as industrial production and building and heating, user's neighborhood covering is wide general, and year consumes nearly 700,000,000 tons of coal.But the coal-burned industrial boiler ubiquity inefficiency of China, the problem such as seriously polluted, China's coal-burning boiler average operating efficiency is only 60%-65%, 15-20 percentage point lower than Foreign Advanced Lerel, the SO that annual coal-burned industrial boiler produces
2about 1,000 ten thousand tons, NO
xabout 2,000,000 tons, about 1,000,000 tons, dust, discharge capacity is only second to coal fired power generation.From existing achievement in research, SO
2and the comparatively maturation that Dust Control Technology has developed, but NO
xcontrol technology be still the difficult point in coal-burned industrial boiler Environmental capacity field, improvement combustion technology and burner performance are the effective ways of dealing with problems, so various burner arises at the historic moment, and China existing coal burner ubiquity duration of ignition for Industrial Boiler is long, fuel consumption is large, flame holding is poor, coal adaptability is poor, and can not control NO effectively
xdischarge capacity, be difficult to reach NO
xemission request, be difficult to meet day by day harsh environmental protection standard.
Summary of the invention
The purpose of this utility model is to provide warm flue gas recirculation coal powder burner in one, and solve the current coal burner length duration of ignition for Industrial Boiler, fuel consumption is large, flame holding is poor, and coal adaptability is poor, NO
xthe problem that discharge capacity is large.
For achieving the above object, the technical solution of the utility model is: warm flue gas recirculation coal powder burner in one, comprises burner, described burner, comprise outer second air pipe, First air central tube, is provided with axial rotational flow blade in described outer second air pipe, also comprises air-introduced machine, flue gas recirculation pipe, air-introduced machine one end is connected with boiler back end ductwork, the other end is connected with flue gas recirculation pipe, and described burner also comprises inner second air pipe, and described inner second air pipe air inlet is connected with flue gas recirculation pipe.
Further, the wind speed in described First air central tube is 15-20m/s; Described inner second air pipe axial velocity is 20-25m/s; Described outer second air pipe axial velocity is 25-40m/s; The swirl vane of described burner is circumferentially arranged, eddy flow angle is 35-55 °; Burner outlet side is provided with enlarging.
Described inner second air pipe air inflow and outer second air pipe air inflow are than being 3:7 ~ 1:4.
The utility model structure is simple, First air central tube pulverized coal conveying, and inner second air pipe is by the middle temperature flue gas of connected flue gas recirculation pipe conveying 400 ~ 700 DEG C, and air carried by outer second air pipe.
Compared with prior art, the utility model has the following advantages:
(1) the of short duration igniting of micro-oil/nothing oil can be realized: utilize the middle warm flue gas in flue gas recirculation pipe to be inner second air, after mixing with First air coal dust, mixing wind powder stream temperature can be made to reach more than 300 DEG C, decrease wind powder stream and be heated to heat needed for ignition temperature, the of short duration igniting of micro-oil/nothing oil can be realized, strengthening coal powder ignition;
(2) NO is reduced
xdischarge capacity: utilize the middle temperature cycling hot flue gas of 400 ~ 700 DEG C to substitute air as Secondary Air, adopt staged air distribution air supply mode simultaneously, the oxygen concentration of the indoor local of adjustable control combustion, ensures the reducing atmosphere in pulverized coal flame central high temperature region, reduces NO
xgrowing amount, general flue gas recirculation rate is the 20%-30% of total combustion-supporting air quantity;
(3) improve the flame holding of coal dust: on the one hand, the introducing of the middle temperature cycling hot flue gas of 400 ~ 700 DEG C and with the mixing of primary wind and powder, mixed airflow temperature increase substantially the flame holding increasing the coal dust firing initial stage; On the other hand, turbulent burner installs enlarging additional, can form the reverse reflux of furnace high-temperature flue gas, high temperature recirculation zone as stable thermal source, breeze airflow can be made timely smooth combustion of fighting;
(4) coal adaptability is improved: during the present invention adopts, the circulate mode that combines with air stage feeding technology of warm flue gas enhances the ignition and steady combustion of coal dust, allows the coal dust using more extensive coal.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
As shown in Figure 1, in one, warm flue gas recirculation coal powder burner, comprises burner, described burner, comprise outer second air pipe 5, First air central tube 3, in outer second air pipe 5, be provided with axial rotational flow blade 6, also comprise air-introduced machine 1, flue gas recirculation pipe 2, air-introduced machine 1 one end is connected with boiler back end ductwork, and the other end is connected with flue gas recirculation pipe 2, and burner also comprises inner second air pipe 4, inner second air pipe 4 air inlet is connected with flue gas recirculation 2 pipe, and burner outlet side is provided with enlarging.
During use, First air central tube pulverized coal conveying, inner second air pipe is by the middle temperature flue gas of connected flue gas recirculation pipe conveying 400 ~ 700 DEG C, and air carried by outer second air pipe.Wind speed in First air central tube is 15-20m/s; Inner second air pipe axial velocity is 20-25m/s; Outer second air pipe axial velocity is 25-40m/s; The swirl vane of burner is circumferentially arranged, eddy flow angle is 35-55 °.Inner second air pipe air inflow and outer second air pipe air inflow are than being 3:7 ~ 1:4, and flue gas recirculation amount is the 20%-30% of total combustion-supporting air quantity.
Claims (8)
1. warm flue gas recirculation coal powder burner in a kind, comprise burner, described burner, comprise outer second air pipe, First air central tube, is characterized in that: also comprise air-introduced machine, flue gas recirculation pipe, air-introduced machine one end is connected with boiler back end ductwork, the other end is connected with flue gas recirculation pipe, and described burner also comprises inner second air pipe, and described inner second air pipe air inlet is connected with flue gas recirculation pipe.
2. middle temperature flue gas recirculation coal powder burner according to claim 1, is characterized in that: be provided with axial rotational flow blade in described outer second air pipe.
3. middle temperature flue gas recirculation coal powder burner according to claim 1, is characterized in that: the wind speed in described First air central tube is 15-20m/s.
4. middle temperature flue gas recirculation coal powder burner according to claim 1, is characterized in that: described inner second air pipe axial velocity is 20-25m/s.
5. middle temperature flue gas recirculation coal powder burner according to claim 1, is characterized in that: described outer second air pipe axial velocity is 25-40m/s.
6. middle temperature flue gas recirculation coal powder burner according to claim 1, it is characterized in that: the swirl vane of described burner is circumferentially arranged, eddy flow angle is 35-55 °.
7. middle temperature flue gas recirculation coal powder burner according to claim 1, is characterized in that: burner outlet side is provided with enlarging.
8. middle temperature flue gas recirculation coal powder burner according to claim 1, is characterized in that: described inner second air pipe air inflow and outer second air pipe air inflow are than being 3:7 ~ 1:4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420483262.3U CN204165045U (en) | 2014-08-26 | 2014-08-26 | Warm flue gas recirculation coal powder burner in one |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420483262.3U CN204165045U (en) | 2014-08-26 | 2014-08-26 | Warm flue gas recirculation coal powder burner in one |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204165045U true CN204165045U (en) | 2015-02-18 |
Family
ID=52538729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420483262.3U Expired - Fee Related CN204165045U (en) | 2014-08-26 | 2014-08-26 | Warm flue gas recirculation coal powder burner in one |
Country Status (1)
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|---|---|
| CN (1) | CN204165045U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465780A (en) * | 2015-12-23 | 2016-04-06 | 杭州燃油锅炉有限公司 | Ultralow NOx pulverized coal burner |
| CN106765216A (en) * | 2017-02-27 | 2017-05-31 | 洛阳明远石化技术有限公司 | Burner and tail gas burning facility |
| CN106925109A (en) * | 2017-05-17 | 2017-07-07 | 山西大学 | Using the device and method of sulfur trioxide in swirl injection device removing coal-fired flue-gas |
| CN107091475A (en) * | 2017-06-19 | 2017-08-25 | 唐山金沙燃烧热能股份有限公司 | Ultralow nitrogen neat gas burner |
| CN107559821A (en) * | 2017-09-21 | 2018-01-09 | 哈尔滨工业大学 | The multiple-pass industrial coal powder boiler of flue gas recirculation and vortex burner overhead |
| CN107606606A (en) * | 2017-09-21 | 2018-01-19 | 哈尔滨工业大学 | Powder " Ω " shape industrial coal powder boiler is given at a kind of center using flue gas recirculation |
| CN109578993A (en) * | 2018-12-06 | 2019-04-05 | 西安交通大学 | A kind of Horizontal coal stoves and its flue gas recirculation system and operating method |
| CN109631024A (en) * | 2018-12-18 | 2019-04-16 | 哈尔滨工业大学 | A kind of swirling pulverized coal combustion device that the radial air using flue gas recirculation is classified |
| CN109654484A (en) * | 2018-12-18 | 2019-04-19 | 哈尔滨工业大学 | Spray reducing agent denitration in the stove burner in industrial coal powder boiler burner primary zone |
-
2014
- 2014-08-26 CN CN201420483262.3U patent/CN204165045U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465780A (en) * | 2015-12-23 | 2016-04-06 | 杭州燃油锅炉有限公司 | Ultralow NOx pulverized coal burner |
| CN106765216A (en) * | 2017-02-27 | 2017-05-31 | 洛阳明远石化技术有限公司 | Burner and tail gas burning facility |
| CN106925109A (en) * | 2017-05-17 | 2017-07-07 | 山西大学 | Using the device and method of sulfur trioxide in swirl injection device removing coal-fired flue-gas |
| CN107091475A (en) * | 2017-06-19 | 2017-08-25 | 唐山金沙燃烧热能股份有限公司 | Ultralow nitrogen neat gas burner |
| CN107559821A (en) * | 2017-09-21 | 2018-01-09 | 哈尔滨工业大学 | The multiple-pass industrial coal powder boiler of flue gas recirculation and vortex burner overhead |
| CN107606606A (en) * | 2017-09-21 | 2018-01-19 | 哈尔滨工业大学 | Powder " Ω " shape industrial coal powder boiler is given at a kind of center using flue gas recirculation |
| CN107559821B (en) * | 2017-09-21 | 2019-11-15 | 哈尔滨工业大学 | The multiple-pass industrial coal powder boiler of flue gas recirculation and vortex burner overhead |
| CN107606606B (en) * | 2017-09-21 | 2019-12-31 | 哈尔滨工业大学 | Central powder feeding omega-shaped industrial pulverized coal boiler adopting flue gas recirculation |
| CN109578993A (en) * | 2018-12-06 | 2019-04-05 | 西安交通大学 | A kind of Horizontal coal stoves and its flue gas recirculation system and operating method |
| CN109631024A (en) * | 2018-12-18 | 2019-04-16 | 哈尔滨工业大学 | A kind of swirling pulverized coal combustion device that the radial air using flue gas recirculation is classified |
| CN109654484A (en) * | 2018-12-18 | 2019-04-19 | 哈尔滨工业大学 | Spray reducing agent denitration in the stove burner in industrial coal powder boiler burner primary zone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20150826 |
|
| EXPY | Termination of patent right or utility model |