CN204213947U - Prevent high-temperature flue gas draw-out device coking arrangement - Google Patents
Prevent high-temperature flue gas draw-out device coking arrangement Download PDFInfo
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- CN204213947U CN204213947U CN201420620625.3U CN201420620625U CN204213947U CN 204213947 U CN204213947 U CN 204213947U CN 201420620625 U CN201420620625 U CN 201420620625U CN 204213947 U CN204213947 U CN 204213947U
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- superheater
- out device
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- flue gas
- temperature flue
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Abstract
One prevents high-temperature flue gas draw-out device coking arrangement.The existing mode by improving fume extracting device self structure, cannot thoroughly solve high-temperature flue gas coking problem.The utility model composition comprises: burner hearth (6) outside of tower boiler is water-cooling wall (10), described water-cooling wall has one group of water-cooling wall middle transition header (9), there is in described tower boiler burner hearth economizer (8), described economizer bottom has two-stage superheater (7), final reheater (2) is equipped with in described two-stage superheater bottom, described final reheater bottom has finishing superheater (3), there is under described finishing superheater primary superheater (5), between described primary superheater and described finishing superheater, or stove cigarette draw-out device (4) is housed between described finishing superheater and described final reheater, tower boiler adopts tangential combustion.The utility model is applied to and prevents the coking of high-temperature flue gas draw-out device.
Description
technical field:
the utility model relates to one and prevents high-temperature flue gas draw-out device coking arrangement, and being applicable to take brown coal as the thermal power generation unit of main fuel, adopts the tower boiler scheme of fanned powder-grinding system.
background technology:
in field of thermal power, for the Brown Coal of water content more than 35%, generally need to adopt fanned powder-grinding system, the requirement of pulverized coal preparation system drying capacity can be met.Ash fusion point temperature due to Brown Coal is general lower, and in the design of the tower boiler using brown coal of routine, stove cigarette draw-out device is all arranged in boiler upper furnace, the below of primary superheater, the flue-gas temperature in this region is generally higher than 1050 DEG C, this temperature is close to the grey softening temperature of Brown Coal, when boiler load fluctuation or appearance burning deviation, near causing stove cigarette draw-out device, flue-gas temperature raises further, thus causes stove cigarette draw-out device to occur coking phenomenon.Adopt after fanned powder-grinding system, generally to need from the main drying medium of extracting high-temperature flue gas in boiler furnace as fanned powder-grinding system.At international and domestic power field, on the tower boiler of the employing fanned powder-grinding system put into commercial operation, high-temperature flue gas draw-out device is all arranged in boiler upper furnace, the below of primary superheater.The flue-gas temperature of this position is higher, when using the Brown Coal of low ash smelting point, easily in stove cigarette draw-out device, occurring coking phenomenon, affecting safe operation of the boiler.This problem cannot be thoroughly solved by means of only the mode improving fume extracting device self structure.Need fundamentally to find a kind of method stopping fume extracting device coking.
summary of the invention:
the purpose of this utility model is to provide one and prevents high-temperature flue gas draw-out device coking arrangement.
above-mentioned object is realized by following technical scheme:
one prevents high-temperature flue gas draw-out device coking arrangement, its composition comprises: be water-cooling wall outside the burner hearth of tower boiler, described water-cooling wall has one group of water-cooling wall middle transition header, in described tower boiler burner hearth, there is economizer, described economizer bottom has two-stage superheater, final reheater is equipped with in described two-stage superheater bottom, described final reheater bottom has finishing superheater, under described finishing superheater, there is primary superheater, described primary superheater and between described finishing superheater, or stove cigarette draw-out device is housed between described finishing superheater and described final reheater, tower boiler adopts tangential combustion.
described prevents high-temperature flue gas draw-out device coking arrangement, described stove cigarette draw-out device is arranged between the one-level curtain wall of primary superheater and the secondary curtain wall of finishing superheater, or is arranged between the heating surface of finishing superheater and the heating surface of final reheater.
described prevents high-temperature flue gas draw-out device coking arrangement, and described stove cigarette draw-out device is arranged on the heating surface outlet top of boiler primary superheater heating surface outlet top or finishing superheater.
described prevents high-temperature flue gas draw-out device coking arrangement, and described stove cigarette draw-out device, along boiler water wall circumference, arranges 6 ~ 8 stove cigarette draw-out devices altogether.
the beneficial effects of the utility model:
1. boiler high temperature stove cigarette draw-out device is arranged on heating surface outlet (top) of primary superheater or heating surface outlet (top) region of finishing superheater by the utility model.Boiler smoke temperature will reduce gradually, thus effectively can solve coking problem.
accompanying drawing illustrates:
accompanying drawing 1 is the structural representation that the utility model stove cigarette draw-out device is arranged between the heating surface of primary superheater and the heating surface of finishing superheater.
accompanying drawing 2 is structural representations that the utility model stove cigarette draw-out device is arranged between the heating surface of finishing superheater and final reheater heating surface.
detailed description of the invention:
embodiment 1:
one prevents high-temperature flue gas draw-out device coking arrangement, its composition comprises: tower boiler burner hearth 6, stove cigarette draw-out device 4, be water-cooling wall 10 outside described tower boiler burner hearth, described water-cooling wall has one group of water-cooling wall middle transition header 9, in described tower boiler burner hearth, there is economizer 8, described economizer bottom has two-stage superheater 7, described two-stage superheater bottom has final reheater 2, described final reheater bottom has finishing superheater 3, there is under described finishing superheater primary superheater 5, described primary superheater and between described finishing superheater, or stove cigarette draw-out device 4 is housed between described finishing superheater and described final reheater, tower boiler adopts tangential combustion.
embodiment 2:
high-temperature flue gas draw-out device coking arrangement is prevented according to embodiment 1, described stove cigarette draw-out device is arranged between the heating surface of primary superheater and the heating surface of finishing superheater, or is arranged between the heating surface of finishing superheater and the heating surface of final reheater.
embodiment 3:
tower boiler described in embodiment 2 prevents high-temperature flue gas draw-out device coking structure, and described stove cigarette draw-out device is arranged on boiler primary superheater heating surface outlet top or two-stage superheater heating surface outlet top.
embodiment 4:
embodiment 1 or the tower boiler described in 2 or 3 prevent high-temperature flue gas draw-out device coking structure, and described stove cigarette draw-out device, along boiler water wall circumference, arranges 6 ~ 8 stove cigarette draw-out devices altogether.
described tower boiler prevents high-temperature flue gas draw-out device method for arranging, from boiler furnace outlet region extraction high-temperature flue gas, as the main drying medium of fanned powder-grinding system, after high-temperature flue gas is mixed with the medium of lower temperature by stove cigarette draw-out device, enter high-temperature furnace smoke pipeline, and finally enter blower mill, described stove cigarette draw-out device along boiler water wall circumferentially, arrange 6 ~ 8 stove cigarette draw-out devices altogether, the flue-gas temperature of installing stove cigarette draw-out device position is guaranteed lower than grey softening temperature more than 100 DEG C.Stove cigarette draw-out device is fundamentally avoided to occur coking phenomenon thus.
for the tower boiler adopting fanned powder-grinding system, high-temperature boiler flue gas is after flowing through boiler heating surface at different levels, flue-gas temperature will lower gradually, after boiler smoke temperature is lower than the grey deformation temperature of ature of coal, coking phenomenon is there will not be when smoke contacts low-temperature components, described high-temperature flue gas draw-out device position is arranged on primary superheater heating surface exit, or two-stage superheater heating surface exit.
Claims (4)
1.
one prevents high-temperature flue gas draw-out device coking arrangement, its composition comprises: be water-cooling wall outside the burner hearth of tower boiler, described water-cooling wall has one group of water-cooling wall middle transition header, in described tower boiler burner hearth, there is economizer, it is characterized in that: described economizer bottom has two-stage superheater, final reheater is equipped with in described two-stage superheater bottom, described final reheater bottom has finishing superheater, under described finishing superheater, there is primary superheater, described primary superheater and between described finishing superheater, or stove cigarette draw-out device is housed between described finishing superheater and described final reheater, tower boiler adopts tangential combustion.
2.
according to claim 1ly prevent high-temperature flue gas draw-out device coking arrangement, it is characterized in that: described stove cigarette draw-out device is arranged between the one-level curtain wall of primary superheater and the secondary curtain wall of finishing superheater, or is arranged between the heating surface of finishing superheater and the heating surface of final reheater.
3.
according to claim 2ly prevent high-temperature flue gas draw-out device coking arrangement, it is characterized in that: described stove cigarette draw-out device is arranged on the heating surface outlet top of boiler primary superheater heating surface outlet top or finishing superheater.
4.
according to claim 1 or 2 or 3, prevent high-temperature flue gas draw-out device coking arrangement, it is characterized in that: described stove cigarette draw-out device, along boiler water wall circumference, arranges 6 ~ 8 stove cigarette draw-out devices altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420620625.3U CN204213947U (en) | 2014-10-25 | 2014-10-25 | Prevent high-temperature flue gas draw-out device coking arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420620625.3U CN204213947U (en) | 2014-10-25 | 2014-10-25 | Prevent high-temperature flue gas draw-out device coking arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204213947U true CN204213947U (en) | 2015-03-18 |
Family
ID=52982613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420620625.3U Withdrawn - After Issue CN204213947U (en) | 2014-10-25 | 2014-10-25 | Prevent high-temperature flue gas draw-out device coking arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204213947U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266204A (en) * | 2014-10-25 | 2015-01-07 | 哈尔滨锅炉厂有限责任公司 | High temperature flue gas extraction device coking preventing arrangement structure and arrangement method |
| CN106322424A (en) * | 2016-04-08 | 2017-01-11 | 上海理工大学 | Volute air inlet furnace smoke mixing chamber and brown coal boiler including chamber |
-
2014
- 2014-10-25 CN CN201420620625.3U patent/CN204213947U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266204A (en) * | 2014-10-25 | 2015-01-07 | 哈尔滨锅炉厂有限责任公司 | High temperature flue gas extraction device coking preventing arrangement structure and arrangement method |
| CN104266204B (en) * | 2014-10-25 | 2017-05-03 | 哈尔滨锅炉厂有限责任公司 | High temperature flue gas extraction device coking preventing arrangement structure and arrangement method |
| CN106322424A (en) * | 2016-04-08 | 2017-01-11 | 上海理工大学 | Volute air inlet furnace smoke mixing chamber and brown coal boiler including chamber |
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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 | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150318 Effective date of abandoning: 20170503 |