CN105485667A - Pulverized coal reheating boiler - Google Patents
Pulverized coal reheating boiler Download PDFInfo
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- CN105485667A CN105485667A CN201510339273.3A CN201510339273A CN105485667A CN 105485667 A CN105485667 A CN 105485667A CN 201510339273 A CN201510339273 A CN 201510339273A CN 105485667 A CN105485667 A CN 105485667A
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- reheating
- pulverized
- fired boiler
- coal fired
- air
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Abstract
The invention relates to the technical field of high-temperature and ultra-high-pressure boilers, and specifically discloses a pulverized coal reheating boiler which reduces the emissions of nitrogen oxides while meeting high-temperature and ultra-high-pressure requirements, thus achieving environmental protection standards. The pulverized coal reheating boiler comprises a hearth, wherein a combustor is arranged on the hearth; and the hearth is sequentially communicated with an uptake flue, a horizontal flue and an exit flue. The pulverized coal reheating boiler is characterized in that the combustor comprises ignition layers, secondary air inlets, primary air inlets, COFA air nozzles and SOFA air nozzles which are sequentially arranged from bottom up; a movable blade is arranged in each COFA air nozzle; and an air outlet direction of each SOFA air nozzle forms a certain angle with the tangent line of a tangent circle of a main combustor.
Description
Technical field
The present invention relates to superhigh-pressure high-temp boiler technology field, be specially a kind of reheating pulverized-coal fired boiler.
Background technology
Boiler is the equipment often used in industrial production, reheating pulverized-coal fired boiler is a kind of is core with coal dust firing, by the complete boiler technology system of the technological maheup such as coal dust acceptance, deposit, conveying, burning and igniting, boiler heat exchange, gas cleaning, automatic control, along with to equipment requirement to improve constantly maximization boiler applications more and more extensive, for the boiler of picture 220t/h superhigh-pressure high-temp, for the layout of burner, and for emission request with very high, existing equipment does not generally all reach environmental requirement.
Summary of the invention
In order to solve the problem, the invention provides a kind of reheating pulverized-coal fired boiler, reduce the discharge of oxynitrides while it meets the requirement of superhigh-pressure high-temp, reaching environmental protection standard.
Its technical scheme is such: a kind of reheating pulverized-coal fired boiler, it comprises burner hearth, described burner hearth is provided with burner, described burner hearth is communicated with uptake flue, horizontal flue and exhaust pass successively, it is characterized in that, described burner comprise arrange successively from bottom to up ignition layer, secondary air inlet, First air import, COFA wind snout, SOFA wind snout, be provided with moving vane in described COFA wind snout, the tangent line of the described air-out direction of SOFA wind snout and the circle of contact of main burner is angled.
It is further characterized in that, described ignition layer is provided with oven gas lighting-up tuyere;
Described moving vane pendulum angle≤15 °;
The described air-out direction of SOFA wind snout and the circle of contact of main burner tangent line become the angle of 12 °;
Heating surface is provided with in described uptake flue, high temperature superheater and high temperature reheater is provided with in described horizontal flue, described exhaust pass comprises two passages, is provided with in low-temperature reheater, passage described in another and is provided with low temperature superheater in a described passage;
Described low-temperature reheater and described low temperature superheater lower end are respectively arranged with gas baffle;
The reheated steam inlet pipeline of described low-temperature reheater is provided with emergency spray attemperator and corresponding shower nozzle;
The outlet conduit of described low-temperature reheater is separately installed with micro-direct-contact desuperheater and corresponding shower nozzle with on the inlet pipeline of described high temperature reheater.
After adopting structure of the present invention, adopt the combination of COFA wind snout and SOFA wind snout, ensure that entering boiler body after the ash of gasification furnace mixes with coal dust carries out Thorough combustion, reduces the discharge of oxynitrides, reaches environmental protection standard while meeting the requirement of superhigh-pressure high-temp.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is SOFA wind snout horizontal cross-section schematic diagram.
Detailed description of the invention
See Fig. 1, shown in Fig. 2, a kind of reheating pulverized-coal fired boiler, it comprises burner hearth 1, burner hearth is provided with burner, burner hearth 1 is communicated with uptake flue 2 successively, horizontal flue 3 and exhaust pass 4, burner comprises the ignition layer 5 arranged successively from bottom to up, secondary air inlet 6, First air import 7, COFA wind snout 8, SOFA wind snout 9, moving vane is provided with in COFA wind snout 8, can up and down and swing, moving vane pendulum angle≤15 °, the air-out direction of SOFA wind snout 9 and the circle of contact of main burner tangent line become into the angle of 12 °, namely the θ in Fig. 2, boiler body burner is entered after the ash of gasification furnace mixes with coal dust, the mass ratio using gasification ashes can reach 41.2%.
The air capacity taken due to oven gas is larger, so igniting air port have employed the form be separated with lower overfiren air port, ignition layer is provided with separately oven gas lighting-up tuyere, because oven gas Air Quantity Required when lighting a fire is larger, account for 18% of total blast volume ratio, if oven gas lighting-up tuyere and lower overfiren air port are shared, Secondary Air is then descended to account for the ratio of total blast volume too large, make all the other overfire air ports by calm available, when being unfavorable for normally running one, the proportioning of Secondary Air, now oven gas igniting is arranged separately a spout, when lighting a fire, this spout standard-sized sheet can be ensured the needs of oven gas igniting air distribution, when normally running, this igniting spout is stopped transport, only logical cooling air cools, one of main burner can be guaranteed, the proportioning of Secondary Air, all be in optimum state when ensureing igniting and normal operation simultaneously.
Be provided with heating surface 11 in uptake flue 2, be provided with high temperature superheater 12 and high temperature reheater 13 in horizontal flue 3, exhaust pass 4 comprises two passages, is provided with in low-temperature reheater 15, another passage and is provided with low temperature superheater 16 in a passage; Low-temperature reheater 15 and low temperature superheater 16 lower end are respectively arranged with gas baffle 17, and pattern is a point partitioned compartment type, and gas baffle 17 is arranged in cigarette temperature about 370 DEG C of regions, and the action of gas baffle 17 is connected by connecting rod and executing agency and operates; The reheated steam inlet pipeline 18 of low-temperature reheater 15 is provided with emergency spray attemperator and corresponding shower nozzle, as accident emergency spray use, to protect reheater; Reheated steam temperature adjustment is adjusted to master with gas baffle 17, and watering temperature adjustment is auxiliary adjustment means.
The outlet conduit of low-temperature reheater 15 is separately installed with micro-direct-contact desuperheater 14 and corresponding shower nozzle with on the inlet pipeline of high temperature reheater 13, controls the vapor (steam) temperature deviation entering high temperature reheater 13 both sides.
Claims (8)
1. a reheating pulverized-coal fired boiler, it comprises burner hearth, described burner hearth is provided with burner, described burner hearth is communicated with uptake flue, horizontal flue and exhaust pass successively, it is characterized in that, described burner comprise arrange successively from bottom to up ignition layer, secondary air inlet, First air import, COFA wind snout, SOFA wind snout, be provided with moving vane in described COFA wind snout, the tangent line of the described air-out direction of SOFA wind snout and the circle of contact of main burner is angled.
2. a kind of reheating pulverized-coal fired boiler according to claim 1, it is characterized in that, described ignition layer is provided with oven gas lighting-up tuyere.
3. a kind of reheating pulverized-coal fired boiler according to claim 1, is characterized in that, described moving vane pendulum angle≤15 °.
4. a kind of reheating pulverized-coal fired boiler according to claim 1, is characterized in that, the described air-out direction of SOFA wind snout and the circle of contact of main burner tangent line become the angle of 12 °.
5. a kind of reheating pulverized-coal fired boiler according to claim 1, it is characterized in that, heating surface is provided with in described uptake flue, high temperature superheater and high temperature reheater is provided with in described horizontal flue, described exhaust pass comprises two passages, is provided with in low-temperature reheater, passage described in another and is provided with low temperature superheater in a described passage.
6. a kind of reheating pulverized-coal fired boiler according to claim 5, is characterized in that, described low-temperature reheater and described low temperature superheater lower end are respectively arranged with gas baffle.
7. a kind of reheating pulverized-coal fired boiler according to claim 5, is characterized in that, the reheated steam inlet pipeline of described low-temperature reheater is provided with emergency spray attemperator and corresponding shower nozzle.
8. a kind of reheating pulverized-coal fired boiler according to claim 5, is characterized in that, the outlet conduit of described low-temperature reheater is separately installed with micro-direct-contact desuperheater and corresponding shower nozzle with on the inlet pipeline of described high temperature reheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339273.3A CN105485667B (en) | 2015-06-18 | 2015-06-18 | A kind of reheating pulverized-coal fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339273.3A CN105485667B (en) | 2015-06-18 | 2015-06-18 | A kind of reheating pulverized-coal fired boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105485667A true CN105485667A (en) | 2016-04-13 |
| CN105485667B CN105485667B (en) | 2019-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510339273.3A Active CN105485667B (en) | 2015-06-18 | 2015-06-18 | A kind of reheating pulverized-coal fired boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953231A (en) * | 2016-06-24 | 2016-09-21 | 无锡华光锅炉股份有限公司 | High-parameter waste incineration boiler with reheating function |
| CN107314367A (en) * | 2017-07-25 | 2017-11-03 | 无锡华光锅炉股份有限公司 | Pulverized-coal fired boiler arrangement structure |
| CN113048463A (en) * | 2021-05-13 | 2021-06-29 | 西安热工研究院有限公司 | System for main reheat steam temperature deviation is adjusted to four corners tangential boiler |
Citations (6)
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| US4715301A (en) * | 1986-03-24 | 1987-12-29 | Combustion Engineering, Inc. | Low excess air tangential firing system |
| CN102012019A (en) * | 2010-12-20 | 2011-04-13 | 武汉华是能源环境工程有限公司 | Multiple coal type low-nitrogen direct flow pulverized coal combustion device and control method of nozzle thereof |
| CN201954529U (en) * | 2011-03-24 | 2011-08-31 | 河北联合大学 | DC (direct current) combustor layout structure of cut oval pulverized coal fired boiler |
| CN104033888A (en) * | 2014-06-11 | 2014-09-10 | 广东电网公司电力科学研究院 | Four-corner tangential boiler and hearth thereof |
| CN104075309A (en) * | 2014-06-30 | 2014-10-01 | 章礼道 | Eastern-Junggar-coal fired double-reheat steam power plant boiler |
| CN204739576U (en) * | 2015-06-18 | 2015-11-04 | 无锡华光锅炉股份有限公司 | Reheat pulverized coal boiler |
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2015
- 2015-06-18 CN CN201510339273.3A patent/CN105485667B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4715301A (en) * | 1986-03-24 | 1987-12-29 | Combustion Engineering, Inc. | Low excess air tangential firing system |
| CN102012019A (en) * | 2010-12-20 | 2011-04-13 | 武汉华是能源环境工程有限公司 | Multiple coal type low-nitrogen direct flow pulverized coal combustion device and control method of nozzle thereof |
| CN201954529U (en) * | 2011-03-24 | 2011-08-31 | 河北联合大学 | DC (direct current) combustor layout structure of cut oval pulverized coal fired boiler |
| CN104033888A (en) * | 2014-06-11 | 2014-09-10 | 广东电网公司电力科学研究院 | Four-corner tangential boiler and hearth thereof |
| CN104075309A (en) * | 2014-06-30 | 2014-10-01 | 章礼道 | Eastern-Junggar-coal fired double-reheat steam power plant boiler |
| CN204739576U (en) * | 2015-06-18 | 2015-11-04 | 无锡华光锅炉股份有限公司 | Reheat pulverized coal boiler |
Non-Patent Citations (1)
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| 潘凤萍，等: "《火力发电机组自启停控制技术及应用》", 31 December 2011, 科学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953231A (en) * | 2016-06-24 | 2016-09-21 | 无锡华光锅炉股份有限公司 | High-parameter waste incineration boiler with reheating function |
| CN107314367A (en) * | 2017-07-25 | 2017-11-03 | 无锡华光锅炉股份有限公司 | Pulverized-coal fired boiler arrangement structure |
| CN113048463A (en) * | 2021-05-13 | 2021-06-29 | 西安热工研究院有限公司 | System for main reheat steam temperature deviation is adjusted to four corners tangential boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105485667B (en) | 2019-01-01 |
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Address after: 214028 No. 3 Chengnan Road, new Wu District, Jiangsu, Wuxi Patentee after: Wuxi Huaguang Environmental Protection Energy Group Co., Ltd Address before: 214028 No. 3 Chengnan Road, New District, Jiangsu, Wuxi Patentee before: WUXI HUAGUANG BOILER Co.,Ltd. |
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