CN203052647U - Boiler capable of adjusting smoke temperature of hearth outlet - Google Patents
Boiler capable of adjusting smoke temperature of hearth outlet Download PDFInfo
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- CN203052647U CN203052647U CN 201220326335 CN201220326335U CN203052647U CN 203052647 U CN203052647 U CN 203052647U CN 201220326335 CN201220326335 CN 201220326335 CN 201220326335 U CN201220326335 U CN 201220326335U CN 203052647 U CN203052647 U CN 203052647U
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Abstract
The utility model relates to a boiler capable of adjusting a smoke temperature of a hearth outlet. The boiler comprises a hearth, the hearth outlet communicated with an upper end opening of the hearth, and a front screen over-heater, a rear screen over-heater and a high-temperature over-heater which are mounted in the hearth outlet; combustor groups are mounted at four corners of the middle part of the hearth, namely below the lower edge of furnace arches in the hearth; a far type over fire air nozzle is mounted above the combustor groups or can be not mounted; a temperature-adjusting air nozzle is mounted above the far type over fire air nozzle; the rear side of the temperature-adjusting air nozzle is connected with a hot air connection flue and a cold air connection flue; the hot air connection flue is provided with a hot air adjusting damper; the cold air connection flue is provided with a cold air adjusting damper; a three-way pipeline is formed by the temperature-adjusting air nozzle, the hot air connection flue and the cold air connection flue; the hot air connection flue is externally connected with a secondary air pre-cooler; and the cold air connection flue is externally connected with a forced draught blower. According to the boiler disclosed by the utility model, the temperature of sprayed air can be flexibly adjusted, air is sprayed in a region with basically complete combustion of pulverized coal, and dust area is not enlarged.
Description
Technical field
The utility model relates to a kind of boiler that can regulate furnace outlet gas temperature.
Background technology
Because the thermoelectricity development is rapid, electric coal supply form anxiety can't guarantee that electricity generation boiler uses the coal that designs or approach design in recent years.The accurate eastern generation output of coal in Xinjiang is big, and how tame power plant is forced to use the coal that this area produces, Na, Cl constituent content height in the accurate eastern coal, Na in its ash component owing to fuel is in short supply
2O content can reach 4%, Cl element compound content can reach 3%, the melting point compound that Na, Cl element form in the coal ash is low, because this characteristics coal ash is met cold back deposition on the superheater tube along with hot flue gas takes to, produce and stain and coking, and then block high temperature superheater, the block airflow passage makes boiler be forced to blowing out.High temperature superheater coking meeting has clear improvement when flue gas temperature of hearth outlet is lower than 950 ℃ after deliberation.Because boiler type selecting determines that a lot of parameters and structure can't change, can't play tangible improvement to the high temperature superheater coking though can alleviate water-cooling wall zone coking by burner reconstruction.Need find a kind of remodeling method reply boiler of feasible easy row to change the coking problem of bringing after the coal.
Burner hearth leaks out and can reduce furnace outlet gas temperature, but the imperfect combustion position of coal dust in stove, position of leaking out is bigger to the economical influence of boiler.Send into burner hearth in the zone of coal dust after-flame and leak out and to play the effect that reduces furnace outlet gas temperature, do not influence the after-flame of coal dust simultaneously.Burner hearth leaks out and often is considered to a kind of Eco-power negative factor of boiler that influences, but in this patent in order to reduce the furnace outlet temperature, prevent that boiler superheater from staiing, the artificial cold wind that adds above sets of burners reduces the furnace outlet temperature, prevents the high temperature superheater coking.
Summary of the invention
The purpose of this utility model is to propose a kind of easy realization, can effectively prevent from using stain easily at the high temperature superheater place behind Na, the Cl constituent content height ash fusibility coal, the boiler that can regulate furnace outlet gas temperature of coking.
The purpose of this utility model is achieved in that the boiler that can regulate furnace outlet gas temperature, it comprises burner hearth, the furnace outlet that is communicated with the burner hearth upper port, be installed in the preceding screen superheater in the furnace outlet, back screen superheater and high temperature superheater, in burner hearth below the furnace arch, furnace nose lower edge, be that the burner hearth middle part is equipped with sets of burners for four jiaos, above sets of burners, install away from type after-flame wind snout, also the after-flame wind snout can be installed, away from type after-flame wind snout top the temperature adjustment wind snout is installed, connect hot blast connection air channel behind the temperature adjustment wind snout and be connected the air channel with cold wind, the hot blast connection is equipped with the hot blast damper on the air channel, the cold wind connection is equipped with the cold wind damper on the air channel, the temperature adjustment wind snout, hot blast connects the air channel and is connected air channel formation triplate line with cold wind, hot blast connects air channel external secondary wind air preheater, and cold wind connects the external pressure fan in air channel.
The utility model can be transformed on the basis of original boiler plant, and remodeling method is simple, does not destroy the structure of original boiler plant simultaneously, does not influence boiler heating surface.The air that sprays into is introduced by hot blast and cold wind two parts, can regulate temperature flexibly, has stronger adaptability and controllability.And spray into the position in the coal dust zone of burning substantially completely, avoid directly blowing to coal dust, the influence burning can not increase the dust area simultaneously.
Description of drawings
Concrete structure of the present utility model is provided by following drawings and Examples:
Fig. 1 is the boiler structure schematic diagram that can regulate furnace outlet gas temperature.
Legend: 1, burner hearth, 2, sets of burners, 3, the after-flame wind snout, 4, temperature adjustment wind snout, 5, the furnace arch, furnace nose lower edge, 6, furnace outlet, 7, high temperature superheater, 8, pressure fan outlet, 9, cold wind connects the air channel, 10, hot blast connects the air channel, 11, cold wind damper, 12, hot blast damper, 13, preceding screen superheater, 14, back screen superheater.
The specific embodiment
The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
Embodiment: as shown in Figure 1, can regulate furnace outlet gas temperature boiler it comprise burner hearth 1, with the furnace outlet 6 that burner hearth 1 upper port is communicated with, be installed in preceding screen superheater 13, back screen superheater 14 and high temperature superheater 7 in the furnace outlet 6.Below the furnace arch, furnace nose lower edge 5, namely burner hearth 1 middle part is equipped with sets of burners 2 for four jiaos in burner hearth 1, installs away from type after-flame wind snout 3 above sets of burners 2, also after-flame wind snout 3 can be installed.Burner hearth above away from type after-flame wind snout 3 more than two meters is equipped with temperature adjustment wind snout 4 for 1 four jiaos.Temperature adjustment wind snout 4 highly is lower than furnace arch, furnace nose lower edge 5, and furnace arch, furnace nose lower edge 5 is known technology, at this its particular location that do not elaborate.Connect hot blast connection air channel 10 behind the temperature adjustment wind snout 4 and be connected air channel 9 with cold wind, the hot blast connection is equipped with hot blast damper 12 on the air channel 10, and the cold wind connection is equipped with cold wind damper 11 on the air channel 9.Temperature adjustment wind snout 4, hot blast connect air channel 10 and are connected air channel 9 formation triplate lines with cold wind.Hot blast connects air channel 10 external secondary wind air preheaters, and it is through heated hot air heated that hot blast connects in the air channel 10, and cold wind connects air channel 9 external pressure fans, and it is the air that heats through not that cold wind connects in the air channel 9.
Can regulate the wind-warm syndrome that temperature adjustment wind snout 4 sprays by adjusting hot blast damper 12, cold wind damper 11.The wind of temperature adjustment wind snout 4 ejections plays the effect that reduces furnace outlet 6 flue-gas temperatures.Because temperature adjustment wind snout 4 can spray into the lower wind of temperature, so temperature adjustment wind sprays in the flue-gas temperature of back in reducing burner hearth 1, and the air that is unlikely to spray into volume causes the increase of flue gas volume amount, too much increase blower fan power consumption.By spraying into temperature adjustment cold wind, furnace outlet 6 flue-gas temperatures reduce, and temperature can alleviate or avoid coking on the high temperature superheater 7 after reducing.
Introduce if the temperature adjustment wind snout only connects air channel 10 from hot blast, also can play the effect that reduces furnace outlet 6 flue-gas temperatures, but the required air that sprays into is more, flue gas volume is increased too much, the blower fan power consumption increases more.Introduce if the temperature adjustment wind snout only connects air channel 9 from cold wind, can well play the effect that reduces furnace outlet 6 flue-gas temperatures, but because wind-warm syndrome is lower, bigger to the efficiency of combustion influence in boiler later stage.But these two kinds of structures still belong to two kinds of embodiments of the application.
Embodiment 2: as shown in Figure 1, and another technological means of the present invention: temperature adjustment wind snout 4 is arranged in position before the furnace outlet 6, namely between back screen superheater 14 and the high temperature superheater 7.Installing stator in the wind snout of temperature adjustment simultaneously 4, stator can make the air-flow rotation, and reinforcement mixes with flue gas.Stator adopts typical turbulent burner form or oil burner form.All the other are all with embodiment 1.
Embodiment 3: as shown in Figure 1, and another technological means of the present invention: temperature adjustment wind snout 4 is arranged in burner hearth 1 near the four sides furnace wall of furnace arch, furnace nose lower edge or wherein on the relative furnace wall in two sides.All the other are all with embodiment 1.
Claims (4)
1. the boiler that can regulate furnace outlet gas temperature, it comprises burner hearth, the furnace outlet that is communicated with the burner hearth upper port, be installed in the preceding screen superheater in the furnace outlet, back screen superheater and high temperature superheater, it is characterized in that: in burner hearth below the furnace arch, furnace nose lower edge, be that the burner hearth middle part is equipped with sets of burners for four jiaos, above sets of burners, install away from type after-flame wind snout, also the after-flame wind snout can be installed, away from type after-flame wind snout top the temperature adjustment wind snout is installed, connect hot blast connection air channel behind the temperature adjustment wind snout and be connected the air channel with cold wind, the hot blast connection is equipped with the hot blast damper on the air channel, and the cold wind connection is equipped with the cold wind damper, the temperature adjustment wind snout on the air channel, hot blast connects the air channel and is connected air channel formation triplate line with cold wind, hot blast connects air channel external secondary wind air preheater, and cold wind connects the external pressure fan in air channel.
2. the boiler that can regulate furnace outlet gas temperature as claimed in claim 1 is characterized in that: the burner hearth above away from type after-flame wind snout more than two meters is equipped with the temperature adjustment wind snout for four jiaos, and the temperature adjustment wind snout is lower than the furnace arch, furnace nose lower edge in the burner hearth.
3. the boiler that can regulate furnace outlet gas temperature as claimed in claim 1 is characterized in that: the temperature adjustment wind snout can also be arranged in burner hearth near the four sides furnace wall of furnace arch, furnace nose lower edge or wherein on the relative furnace wall in two sides.
4. the boiler that can regulate furnace outlet gas temperature as claimed in claim 1, it is characterized in that: the temperature adjustment wind snout can also be arranged in the position before the furnace outlet, namely between back screen superheater and the high temperature superheater, installing stator in the wind snout of temperature adjustment simultaneously, stator adopts typical turbulent burner form or oil burner form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220326335 CN203052647U (en) | 2012-07-06 | 2012-07-06 | Boiler capable of adjusting smoke temperature of hearth outlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220326335 CN203052647U (en) | 2012-07-06 | 2012-07-06 | Boiler capable of adjusting smoke temperature of hearth outlet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203052647U true CN203052647U (en) | 2013-07-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220326335 Expired - Fee Related CN203052647U (en) | 2012-07-06 | 2012-07-06 | Boiler capable of adjusting smoke temperature of hearth outlet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203052647U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788348A (en) * | 2012-07-06 | 2012-11-21 | 新疆电力建设调试所 | Boiler capable of adjusting flue gas temperature of furnace outlet |
| CN103486563A (en) * | 2013-09-10 | 2014-01-01 | 章礼道 | Supercritical once-through boiler capable of firing eastern Junggar coal |
-
2012
- 2012-07-06 CN CN 201220326335 patent/CN203052647U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788348A (en) * | 2012-07-06 | 2012-11-21 | 新疆电力建设调试所 | Boiler capable of adjusting flue gas temperature of furnace outlet |
| CN103486563A (en) * | 2013-09-10 | 2014-01-01 | 章礼道 | Supercritical once-through boiler capable of firing eastern Junggar coal |
| CN103486563B (en) * | 2013-09-10 | 2015-04-08 | 章礼道 | Supercritical once-through boiler capable of firing eastern Junggar coal |
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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: 20130710 Termination date: 20140706 |
|
| EXPY | Termination of patent right or utility model |