CN203223896U - Subcritical lean coal-burning coal powder boiler - Google Patents
Subcritical lean coal-burning coal powder boiler Download PDFInfo
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- CN203223896U CN203223896U CN 201320176969 CN201320176969U CN203223896U CN 203223896 U CN203223896 U CN 203223896U CN 201320176969 CN201320176969 CN 201320176969 CN 201320176969 U CN201320176969 U CN 201320176969U CN 203223896 U CN203223896 U CN 203223896U
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Abstract
The utility model provides a subcritical lean coal-burning coal powder boiler through which the lean coal with the coal type being Vdaf=14% is fully burnt, the energy source is fully utilized, and energy source is saved. The subcritical lean coal-burning coal powder boiler comprises a hearth, overheaters, a coal economizer and an air preheater; and a burner is arranged in the hearth. The subcritical lean coal-burning coal powder boiler is characterized in that the overheaters comprise a high-temperature overheater arranged above the hearth, and a low-temperature overheater; a shaft flue is communicated above the hearth; two sides of the shaft flue are separated; the low-temperature overheater and the coal economizer are arrayed on two sides of the shaft flue; an overheat steam inlet pipeline is arranged below the low-temperature overheater and is provided with an accident water spraying temperature reducing device; flue gas temperature adjusting baffles are arranged in positions, below the low-temperature overheater and the coal economizer, of the shaft flue respectively; and the high-temperature overheater and the low-temperature overheater are connected with a trace water spraying temperature reducing device respectively.
Description
Technical field
The utility model relates to the technical field of pulverized-coal fired boiler structure, is specially a kind of subcritical combustion meager coal pulverized-coal fired boiler.
Background technology
China is coal production and consumption big country; for reducing coal-fired pollution to environment; improve rate of energy, realize the sustainable development of energy industry, the development large coal powder boiler can substitute the miniature boiler of original numerous poor efficiency, high energy consumption, high pollution; form the scope of the enterprise benefit easily; both improved the business economic benefit, energy efficient can reduce the discharging of pollutant again; favourable to the protection environment, so the market prospects of large coal powder boiler are very wide.Coal is the meager coal of Vdaf=14%, and difficulty is caught fire, difficulty burns, medium coking because this coal has, the characteristic that sulphur content content is high, and existing pulverized-coal fired boiler makes this coal fully not burn, and wastes energy.
Summary of the invention
At the problems referred to above, the utility model provides a kind of subcritical combustion meager coal pulverized-coal fired boiler, and it makes that coal is that the meager coal of Vdaf=14% is fully burned, and makes the energy be fully used, energy savings in boiler.
A kind of subcritical combustion meager coal pulverized-coal fired boiler, its technical scheme is such: it comprises burner hearth, superheater, economizer, air preheater, be provided with burner in the described burner hearth, it is characterized in that: described superheater comprises high temperature superheater, low temperature superheater, the top of described burner hearth is provided with high temperature superheater, the top of described burner hearth is communicated with vertical well gas flue, separate mutually the both sides of described vertical well gas flue, the both sides of described vertical well gas flue are placed with low temperature superheater respectively, economizer, the below of described low temperature superheater is provided with the superheated steam inlet pipeline, on the described superheated steam inlet pipeline emergency spray attemperator is installed, described vertical well gas flue is positioned at described low temperature superheater, the below of economizer is respectively arranged with flue gas temperature adjustment baffle plate, described high temperature superheater, low temperature superheater connects micro-direct-contact desuperheater separately respectively, the passage of the below of two described flue gas temperature adjustment baffle plates for being communicated with, the described province of described channel connection air preheater, the outlet of described air preheater is communicated with bellows, described burner hearth is big corner cut burner hearth, four corner cut positions of described burner hearth are provided with corresponding described burner separately, described bellows are communicated with described burner, described burner is provided with wind snout one time, overfire air port, be equipped with wall with refractory lining, refracto on the water-cooling wall around the described burner, leave the gap between adjacent described wall with refractory lining, refracto, the spray angle of spout of described burner of diagonal position that is positioned at described burner hearth is identical, the outside the place ahead that is positioned at described burner hearth is provided with coal pulverizer, and the discharge of described coal pulverizer is communicated to a wind snout of four described burners respectively by pipeline.
It is further characterized in that: each described burner be furnished with 16 spouts, wherein 6 be that wind snout, 10 are overfire air port, comprise 3 of after-flame wind snouts, 3 of alopecia areata spouts, 4 of intermediate air wind snouts in 10 overfire air ports, described after-flame wind snout comprises 2 top after-flame wind snouts, 1 upper end after-flame wind snout, arranges on described 16 spout vertical direction;
Per 2 wind snouts become one group with respect to centralized arrangement, and every burner has three groups of wind snout groups, leaves spacing between every group of primary air nozzle group;
Be provided with the intermediate air wind snout between every group of wind snout group, the centre of a same group of wind snout separates by the alopecia areata spout of correspondence;
Arrange one deck tiny-oil ignition device in the wind snout of each burner;
The high-order layout of 2 top after-flame wind snouts of each burner, leave spacing with upper end after-flame wind snout, described upper end after-flame wind snout is positioned on the intermediate air wind snout of a wind snout group of the corresponding the superiors, and the flue gas direction that rises on the wind that described top after-flame wind snout, upper end after-flame wind snout spray and the bottom is tangent;
Described coal pulverizer is specially the double-inlet and double-outlet steel ball mill;
Described coal pulverizer is specially three;
The outlet of described air preheater is communicated with described bellows by flange.
After adopting structure of the present utility model, owing to adopt big corner cut burner hearth, for creating good tonifying Qi condition in burner outlet jet both sides, reduce the pressure reduction of jet both sides, be conducive to the tissue of Furnace Aerodynamic Field, flame is difficult for deflection, and the burner hearth degree of filling is good, avoid occurring phenomenons such as local reduction atmosphere, localized hyperthermia and the cold wall of air-flow flush water, can guarantee can not cause the slagging scorification of water wall high temperature corrosion and heating surface; Catch fire and flameholding for making, water-cooling wall has been laid an amount of wall with refractory lining, refracto around burner region, can guarantee the stable ignition of coal dust, can avoid the coking of high-temperature region again, leaves certain clearance between wall with refractory lining, refracto, prevents from climbing slag; And because the top of described burner hearth is provided with high temperature superheater, the top of described burner hearth is communicated with vertical well gas flue, the both sides of described vertical well gas flue are placed with low temperature superheater respectively, economizer, described vertical well gas flue is positioned at described low temperature superheater, the below of economizer is respectively arranged with flue gas temperature adjustment baffle plate, described high temperature superheater, low temperature superheater connects micro-direct-contact desuperheater separately respectively, the below of two described flue gas temperature adjustment baffle plates is passage, the described province of described channel connection air preheater, the outlet of described air preheater is communicated with the air inlet of described burner hearth, and its heat that makes burner hearth inside produce can be by high temperature superheater, low temperature superheater, economizer, air preheater takes full advantage of; To sum up, it makes that coal is that the meager coal of Vdaf=14% is fully burned, and makes the energy be fully used, energy savings in boiler.
Description of drawings
Fig. 1 is front view structural representation of the present utility model;
Fig. 2 is the arrangement schematic diagram of coal pulverizer of the present utility model, burner;
Fig. 3 is each spout arrangement schematic diagram of burner of the present utility model;
Fig. 4 for A place among Fig. 3 local structure for amplifying schematic diagram.
The specific embodiment
See Fig. 1, Fig. 2, Fig. 3, Fig. 4, it comprises burner hearth 1, superheater, economizer 2, air preheater 3, be provided with burner 4 in the burner hearth 1, superheater comprises high temperature superheater 5, low temperature superheater 6, the top of burner hearth 1 is provided with high temperature superheater 5, the top of burner hearth 1 is communicated with vertical well gas flue 7, separate mutually the both sides of vertical well gas flue 7, the both sides of vertical well gas flue 7 are placed with low temperature superheater 6 respectively, economizer 2, the below of low temperature superheater 6 is provided with superheated steam inlet pipeline 8, emergency spray attemperator 9 is installed, as accident emergency spray usefulness, with the protection superheater on the superheated steam inlet pipeline 8; The below that vertical well gas flue 7 is positioned at low temperature superheater 6, economizer 2 is respectively arranged with flue gas temperature adjustment baffle plate 10, high temperature superheater 5, low temperature superheater 6 connect micro-direct-contact desuperheater 11 separately respectively, trace direct-contact desuperheater 11 is arranged on the pipeline between low temperature superheater 6 outlet and high temperature superheater 5 imports, the vapor (steam) temperature deviation that control enters the high temperature superheater both sides; The superheated steam temperature adjustment is adjusted to the master with gas proportioning damper 10, and watering temperature adjustment is the auxiliary adjustment means, and flue gas temperature adjustment baffle plate 10 is arranged in the about 400 ℃ of zones of cigarette temperature, and the action of flue gas temperature adjustment baffle plate 10 links by connecting rod and executing agency and operates; The passage 12 of the below of two flue gas temperature adjustment baffle plates 10 for being communicated with, passage 12 is communicated with economizes air preheater 3, the outlet of air preheater 3 is communicated with bellows 21 by flange 22, burner hearth 1 is big corner cut burner hearth, four corner cut positions of burner hearth are provided with corresponding burner 4 separately, bellows 21 are communicated with each burner 4, burner 4 is provided with wind snout 13 one time, overfire air port, be equipped with wall with refractory lining, refracto 14 on the water-cooling wall around the burner 4,14 of adjacent wall with refractory lining, refracto leave the gap, the spray angle of spout of burner 4 of diagonal position that is positioned at burner hearth 1 is identical, the outside the place ahead that is positioned at burner hearth 1 is provided with coal pulverizer 15, and the discharge of coal pulverizer 15 is communicated to a wind snout 13 of four burners 4 respectively by pipeline.
Each burner 4 be furnished with 16 spouts, wherein 6 be that wind snout 13,10 are overfire air port, comprise 3 of after-flame wind snouts, 3 of alopecia areata spouts, 4 of intermediate air wind snouts in 10 overfire air ports, the after-flame wind snout comprises on 17,16 spout vertical direction of 20,1 upper end after-flame wind snout of 2 top after-flame wind snouts to be arranged; Per 2 wind snouts 13 become one group with respect to centralized arrangement, and every burner has three groups of wind snout groups, leaves spacing between every group of primary air nozzle group, make whole group primary air nozzle not only concentrate but also certain separation is arranged, and can take into account the discharging of burning, slagging scorification and NOx; Be provided with intermediate air wind snout 16 between every group of wind snout group, the top that the top of a wind snout group that goes up most is provided with intermediate air wind snout 16, a wind snout group under is provided with intermediate air wind snout 16; The centre of a same group of wind snout separates by the alopecia areata spout 18 of correspondence; Arrange one deck tiny-oil ignition device 19 in the wind snout 13 of each burner 4; After tiny-oil ignition was finished, the nozzle double as coal nozzle of this tiny-oil ignition device was used; 2 top after-flame wind snouts, 20 high-order layouts of each burner, leave spacing with upper end after-flame wind snout 17, the excess air coefficient in control main burner zone, its value is about 0.94 air quantity and enters, basically form anoxycausis in the main burner zone, upper end after-flame wind snout 17 is positioned on the intermediate air wind snout 16 of a wind snout group of the corresponding the superiors, top after-flame wind snout 20, the flue gas direction that rises on the wind that upper end after-flame wind snout 17 sprays and the bottom is tangent, the furnace outlet tangent is equated substantially with the momentum flow rate square of the air-flow of the traditional method of indicating the pronunciation of a Chinese character, reach the purpose of eliminating the furnace outlet gas temperature deviation.
Coal pulverizer 15 is specially three double-inlet and double-outlet steel ball mills; The wind powder mixture that is come out by every coal pulverizer two ends causes the two-layer coal nozzle of two-layer four jiaos of coal burners 4 through 2 * 4 pulverized coal channels.3 coal pulverizers divide 6 layers of one-tenth level trend to cause four jiaos in burner hearth in totally 3 * 8 spaces of pulverized coal channel between coal pulverizer 15 tops and coal feeder floor.For the better operation that adapts to various operating modes, four layers of interlaced arrangement on the airduct, the coal nozzle layer (from bottom to top) of pulverized coal channel correspondence is A1, A2, B1, C1, C2, B2.Coal is the meager coal of Vdaf=14%, and the pulverized coal preparation system of employing is the cold primary air fan unit pulverized-coal system of double-inlet and double-outlet steel ball mill malleation, has saved investment, and one time wind-warm syndrome only is 115 ℃.
Claims (9)
1. subcritical combustion meager coal pulverized-coal fired boiler, it comprises burner hearth, superheater, economizer, air preheater, be provided with burner in the described burner hearth, it is characterized in that: described superheater comprises high temperature superheater, low temperature superheater, the top of described burner hearth is provided with high temperature superheater, the top of described burner hearth is communicated with vertical well gas flue, separate mutually the both sides of described vertical well gas flue, the both sides of described vertical well gas flue are placed with low temperature superheater respectively, economizer, the below of described low temperature superheater is provided with the superheated steam inlet pipeline, on the described superheated steam inlet pipeline emergency spray attemperator is installed, described vertical well gas flue is positioned at described low temperature superheater, the below of economizer is respectively arranged with flue gas temperature adjustment baffle plate, described high temperature superheater, low temperature superheater connects micro-direct-contact desuperheater separately respectively, the passage of the below of two described flue gas temperature adjustment baffle plates for being communicated with, the described province of described channel connection air preheater, the outlet of described air preheater is communicated with bellows, described burner hearth is big corner cut burner hearth, four corner cut positions of described burner hearth are provided with corresponding described burner separately, described bellows are communicated with described burner, described burner is provided with wind snout one time, overfire air port, be equipped with wall with refractory lining, refracto on the water-cooling wall around the described burner, leave the gap between adjacent described wall with refractory lining, refracto, the spray angle of spout of described burner of diagonal position that is positioned at described burner hearth is identical, the outside the place ahead that is positioned at described burner hearth is provided with coal pulverizer, and the discharge of described coal pulverizer is communicated to a wind snout of four described burners respectively by pipeline.
2. a kind of subcritical combustion meager coal pulverized-coal fired boiler according to claim 1, it is characterized in that: each described burner be furnished with 16 spouts, wherein 6 be that wind snout, 10 are overfire air port, comprise 3 of after-flame wind snouts, 3 of alopecia areata spouts, 4 of intermediate air wind snouts in 10 overfire air ports, described after-flame wind snout comprises 2 top after-flame wind snouts, 1 upper end after-flame wind snout, arranges on described 16 spout vertical direction.
3. a kind of subcritical combustion meager coal pulverized-coal fired boiler according to claim 2, it is characterized in that: per 2 wind snouts become one group with respect to centralized arrangement, and every burner has three groups of wind snout groups, leaves spacing between every group of primary air nozzle group.
4. a kind of subcritical combustion meager coal pulverized-coal fired boiler according to claim 3, it is characterized in that: be provided with the intermediate air wind snout between every group of wind snout group, the centre of a same group of wind snout separates by the alopecia areata spout of correspondence.
5. according to claim 3 or 4 described a kind of subcritical combustion meager coal pulverized-coal fired boilers, it is characterized in that: arrange one deck tiny-oil ignition device in the wind snout of each burner.
6. a kind of subcritical combustion meager coal pulverized-coal fired boiler according to claim 5, it is characterized in that: the high-order layout of 2 top after-flame wind snouts of each burner, leave spacing with upper end after-flame wind snout, described upper end after-flame wind snout is positioned on the intermediate air wind snout of a wind snout group of the corresponding the superiors, and the flue gas direction that rises on the wind that described top after-flame wind snout, upper end after-flame wind snout spray and the bottom is tangent.
7. a kind of subcritical combustion meager coal pulverized-coal fired boiler according to claim 1 is characterized in that: described coal pulverizer is specially the double-inlet and double-outlet steel ball mill.
8. according to claim 1 or 7 described a kind of subcritical combustion meager coal pulverized-coal fired boilers, it is characterized in that: described coal pulverizer is specially three.
9. a kind of subcritical combustion meager coal pulverized-coal fired boiler according to claim 1, it is characterized in that: the outlet of described air preheater is communicated with described bellows by flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320176969 CN203223896U (en) | 2013-04-10 | 2013-04-10 | Subcritical lean coal-burning coal powder boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320176969 CN203223896U (en) | 2013-04-10 | 2013-04-10 | Subcritical lean coal-burning coal powder boiler |
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| CN203223896U true CN203223896U (en) | 2013-10-02 |
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| CN 201320176969 Withdrawn - After Issue CN203223896U (en) | 2013-04-10 | 2013-04-10 | Subcritical lean coal-burning coal powder boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206699A (en) * | 2013-04-10 | 2013-07-17 | 无锡华光锅炉股份有限公司 | Pulverized coal boiler capable of subcritically combusting lean coal |
| CN104534438A (en) * | 2014-04-02 | 2015-04-22 | 银龙 | Energy-saving boiler |
| CN108050508A (en) * | 2017-11-07 | 2018-05-18 | 华中科技大学 | A kind of biomass pyrolytic standby firing system for being integrated in vertical well gas flue after pulverized-coal fired boiler |
-
2013
- 2013-04-10 CN CN 201320176969 patent/CN203223896U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206699A (en) * | 2013-04-10 | 2013-07-17 | 无锡华光锅炉股份有限公司 | Pulverized coal boiler capable of subcritically combusting lean coal |
| CN103206699B (en) * | 2013-04-10 | 2015-04-01 | 无锡华光锅炉股份有限公司 | Pulverized coal boiler capable of subcritically combusting lean coal |
| CN104534438A (en) * | 2014-04-02 | 2015-04-22 | 银龙 | Energy-saving boiler |
| CN108050508A (en) * | 2017-11-07 | 2018-05-18 | 华中科技大学 | A kind of biomass pyrolytic standby firing system for being integrated in vertical well gas flue after pulverized-coal fired boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131002 Effective date of abandoning: 20150401 |
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| RGAV | Abandon patent right to avoid regrant |