CN204420991U - With the U-shaped coal-powder boiler of flue gas recirculation - Google Patents
With the U-shaped coal-powder boiler of flue gas recirculation Download PDFInfo
- Publication number
- CN204420991U CN204420991U CN201420829009.9U CN201420829009U CN204420991U CN 204420991 U CN204420991 U CN 204420991U CN 201420829009 U CN201420829009 U CN 201420829009U CN 204420991 U CN204420991 U CN 204420991U
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- CN
- China
- Prior art keywords
- flue gas
- gas recirculation
- burner hearth
- boiler
- powder boiler
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Abstract
The utility model discloses a kind of U-shaped coal-powder boiler with flue gas recirculation, relate to Industrial Boiler, solve the problem that existing boiler thermal output is low, smoke discharge amount is high.A kind of U-shaped coal-powder boiler with flue gas recirculation, comprise burner hearth, three backhaul expansion chambers, slag bath, wherein also comprise flue gas recirculation passage, the top of described burner hearth is communicated with three backhaul expansion chambers, slag bath is arranged on burner hearth bottom, and the end of three backhaul expansion chambers is communicated with burner hearth bottom by flue gas recirculation passage.The utility model can improve the thermal efficiency of boiler, reduces boiler soot emission amount, and coal adaptability is strong, has good economic and social benefit.
Description
Technical field
The utility model relates to Industrial Boiler, is specifically related to a kind of U-shaped coal-powder boiler with flue gas recirculation.
Background technology
China is the country of rich coal, oil-poor, weak breath, is accounting for about 85% with coal-burned industrial boiler in Industrial Boiler, year consumption about 700,000,000 tons, coal.China uses traditional coal-burned industrial boiler at present in a large number, and its type of furnace is complicated, various in style, but the shortcoming that ubiquity efficiency of combustion lower (60-65%), exhaust emission are serious.
Although the thermal efficiency of the partial fuel coal Industrial Boiler occurred in recent years increases, high and single to the requirement of fuel, there is the shortcoming that operating cost is high.
Summary of the invention
The utility model is the problem that existing boiler thermal output is low, smoke discharge amount is high in order to solve, and provides a kind of U-shaped coal-powder boiler with flue gas recirculation.
The utility model is achieved through the following technical solutions:
A kind of U-shaped coal-powder boiler with flue gas recirculation, comprise burner hearth, three backhaul expansion chambers, slag bath, wherein also comprise flue gas recirculation passage, the top of described burner hearth is communicated with three backhaul expansion chambers, slag bath is arranged on burner hearth bottom, and the end of three backhaul expansion chambers is communicated with burner hearth bottom by flue gas recirculation passage.
Further, the roof tube slope place of described lower furnace portion is provided with turbulent burner, turbulent burner sprays into breeze airflow and combustion air, the thermal-flame of downward helical flow is formed in stove, the flame region of high temperature is formed in lower furnace, ensure coal dust in the confined space while after-flame, guarantee lime-ash at the bottom of uphill furnace, finally enters slag bath with the state flow dissolved.
Described lower furnace portion both walls and front wall place are provided with anti-scorch air port, can prevent burner hearth coking and high temperature corrosion.
It is at the bottom of the uphill furnace of 10 ~ 20o that described burner hearth bottom is provided with horizontal sextant angle, and lime-ash at the bottom of uphill furnace, finally enters slag bath with the state flow dissolved.
At the bottom of the furnace wall of described burner hearth, uphill furnace, slag bath surface is equipped with refractory masses.
Be equipped with condensation tube bank in three described backhaul expansion chambers, bottom is provided with ash bucket; Condensation tube bank can not only reduce outside heat waste, can also avoid with slag in flue gas, ensures that slag flows through at the bottom of uphill furnace with molten state and enters slag bath.
Three described backhaul sedimentation partitions are furnished with low-level (stack-gas) economizer, high-temperature economizer, air preheater and denitrification apparatus; Flue gas passage in transit high-temperature economizer and low-level (stack-gas) economizer, be used for the heating of water by the heat in flue gas, avoid the waste of heat; The heat of flue gas is used for the preheating to combustion air by air preheater, arrives energy-conservation object; SCR denitration device, further to gas cleaning, strictly meets current environmental requirement.
Described flue gas recirculation passage is provided with air-introduced machine, and tail flue gas, under the effect of air-introduced machine, enters boiler by flue gas recirculation passage, realizes flue gas recirculation.
The utility model U-shaped industrial coal powder stove and accessory has relatively little volume, relatively high volume heat load, and compared to the U-shaped coal-powder boiler of routine, lower furnace adopts lower volume heat load to be no more than 220Kw/m3, and burner hearth overall volume thermic load is no more than 150Kw/m3; Leave boiler smoke recirculation line in lower furnace, can flue gas recirculation be realized, low nitrogen burning, meet low oxygen combustion condition; Burner is placed in lower furnace roof tube slope place, flame sweeps away extension, adopt turbulent burner, in lower furnace, the anti-scorch air port preventing burner hearth coking and high temperature corrosion is left at the suitable position of both walls and front wall place, the regional hypoxia thermal-flame with low nitrogen burning function can be obtained, make coal-fired accommodation wider, fuel availability raises, and boiler operating efficiency raises, the coal from anthracite to bituminous coal can be adapted to, except brown coal; With the flue structure of the expansion chamber of three backhauls, and leave between economizer and meet the SCR denitration device furnace inner space structure that cigarette temperature condition is 370 DEG C-420 DEG C; Adopt the heating surface arrangement condition that Natural Circulation and forced circulation combine, meet the security of hot water and steam boiler Hydrodynamic Process, partial structurtes take into full account the impact of the weight of each section of heating surface medium, flowing water and heat flow density deviation, obtain best heating surface cooling condition and requirement of explosion proof; Expansion chamber, vertically arranged air preheater and back-end ductwork coal economizer structure, fully meet the ash content smooth discharge that the caking property that upwards flows is higher, and U-shaped industrial coal powder boiler have SCR from soot cleaning system; The mode that evaporator section heating surface adopts chess formula heating surface to combine with common fin panel casing, to obtain best little space heating surface layout and efficient heat transfer function; Arranged in pairs or groups by the reasonable combination of the heating surface to radiant section and convection section, meet the quantification of the boiler combustion physical dimension of heat distribution condition according to the setting such as caking property, flammability, after-flame performance of ature of coal, possess and obtain good boiler operation situation and desirable overall performance when wider ature of coal.
In sum, the utility model can improve the thermal efficiency of boiler, reduces boiler soot emission amount, and coal adaptability is strong, has good economic and social benefit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
A kind of U-shaped coal-powder boiler with flue gas recirculation as shown in Figure 1, comprises burner hearth 1, three backhaul expansion chamber 8, slag bath 4, and the top of described burner hearth 1 is communicated with three backhaul expansion chambers 8, and slag bath 4 is fixed on bottom burner hearth 1; Wherein also comprise flue gas recirculation passage 15, the end of three described backhaul expansion chambers 8 is communicated with bottom burner hearth 1 by flue gas recirculation passage 15.
Wherein as shown in Figure 1, the roof tube slope place of burner hearth 1 bottom is provided with turbulent burner 2; Lower furnace portion both walls and front wall place are provided with anti-scorch air port 5; It is at the bottom of the uphill furnace of 10 ~ 20o 3 that burner hearth bottom is provided with horizontal sextant angle; At the bottom of the furnace wall of described burner hearth, uphill furnace 3, slag bath 4 surface is equipped with refractory masses 6; Be equipped with condensation tube bank 7 in three backhaul expansion chambers 8, bottom is provided with ash bucket 9; In three backhaul expansion chambers 8, interval is furnished with low-level (stack-gas) economizer 11, high-temperature economizer 10, air preheater 12 and denitrification apparatus 13; Flue gas recirculation passage 15 is provided with air-introduced machine 14, tail flue gas, under the effect of air-introduced machine, enters boiler by flue gas recirculation passage.
Claims (8)
1. with a U-shaped coal-powder boiler for flue gas recirculation, comprise burner hearth (1), three backhaul expansion chambers (8), slag bath (4), the top of described burner hearth (1) is communicated with three backhaul expansion chambers (8), and slag bath (4) is fixed on burner hearth (1) bottom; It is characterized in that, also comprise flue gas recirculation passage (15), the end of three described backhaul expansion chambers (8) is communicated with burner hearth (1) bottom by flue gas recirculation passage (15).
2. the U-shaped coal-powder boiler with flue gas recirculation according to claim 1, is characterized in that, the roof tube slope place of described burner hearth (1) bottom is provided with turbulent burner (2).
3. the U-shaped coal-powder boiler with flue gas recirculation according to claim 1 and 2, is characterized in that, described lower furnace portion both walls and front wall place are provided with anti-scorch air port (5).
4. the U-shaped coal-powder boiler with flue gas recirculation according to claim 1 and 2, is characterized in that, it is (3) at the bottom of the uphill furnace of 10 ~ 20o that described burner hearth bottom is provided with horizontal sextant angle.
5. the U-shaped coal-powder boiler with flue gas recirculation according to claim 1 and 2, is characterized in that, at the bottom of the furnace wall of described described burner hearth, uphill furnace, (3), slag bath (4) surface are equipped with refractory masses (6).
6. the U-shaped coal-powder boiler with flue gas recirculation according to claim 1 and 2, is characterized in that, be equipped with condensation tube bank (7) in three described backhaul expansion chambers (8), bottom is provided with ash bucket (9).
7. the U-shaped coal-powder boiler with flue gas recirculation according to claim 1 and 2, it is characterized in that, three described backhaul expansion chamber (8) interior intervals are furnished with low-level (stack-gas) economizer (11), high-temperature economizer (10), air preheater (12) and denitrification apparatus (13).
8. the U-shaped coal-powder boiler with flue gas recirculation according to claim 1 and 2, is characterized in that, described flue gas recirculation passage (15) is provided with air-introduced machine (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420829009.9U CN204420991U (en) | 2014-12-24 | 2014-12-24 | With the U-shaped coal-powder boiler of flue gas recirculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420829009.9U CN204420991U (en) | 2014-12-24 | 2014-12-24 | With the U-shaped coal-powder boiler of flue gas recirculation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204420991U true CN204420991U (en) | 2015-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420829009.9U Expired - Fee Related CN204420991U (en) | 2014-12-24 | 2014-12-24 | With the U-shaped coal-powder boiler of flue gas recirculation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204420991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650625A (en) * | 2016-02-01 | 2016-06-08 | 哈尔滨红光锅炉总厂有限责任公司 | Efficient pulverized coal-fired industrial boiler |
-
2014
- 2014-12-24 CN CN201420829009.9U patent/CN204420991U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650625A (en) * | 2016-02-01 | 2016-06-08 | 哈尔滨红光锅炉总厂有限责任公司 | Efficient pulverized coal-fired industrial boiler |
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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: 20150624 Termination date: 20151224 |
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| EXPY | Termination of patent right or utility model |