CN105299633A - Bed material heating system for circulating fluidized bed boiler - Google Patents
Bed material heating system for circulating fluidized bed boiler Download PDFInfo
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- CN105299633A CN105299633A CN201510774573.4A CN201510774573A CN105299633A CN 105299633 A CN105299633 A CN 105299633A CN 201510774573 A CN201510774573 A CN 201510774573A CN 105299633 A CN105299633 A CN 105299633A
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- boiler
- heating system
- circulating fluidized
- material heating
- air channel
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a bed material heating system for a circulating fluidized bed boiler. The bed material heating system solves the problem that the air supplying amount of the circulating fluidized bed boiler is hard to control during boiler cold starting. The bed material heating system comprises an air channel (1), a water cooling air chamber (3) and a hearth (7). An air distributing plate (6) is arranged between the water cooling air chamber (3) and the hearth (7). An ignition access (9) is arranged between the air channel (1) and the water cooling air chamber (3). A plasma igniter (2) is arranged on the ignition access (9), and a powder discharging opening (8) is formed in the air channel (1). An air way communicating pipe (4) is arranged in the position, between the air channel (1) and the water cooling air chamber (3), at the front end of the ignition access (9). An adjustable valve (5) is arranged on the air way communicating pipe (4). The system is easy and convenient to operate and is suitable for being used for the circulating fluidized bed boiler in the initial stage of boiler cold starting.
Description
Technical field
The present invention relates to a kind of bed material heating system, particularly a kind of circulating fluidized bed boiler bed material heating system.
Background technology
At present, in Properties of CFB is run, when boiler cold-state starts, adopt plasma ignition under bed technology, in ignition process, primary air flow is difficult to control.If primary air flow is too small, does not reach CFBB minimum critical flowing saturation protection value, cause boiler operatiopn potential safety hazard easily to occur, and primary air flow is too small, also easily causes accumulated powder in water cooled wind chamber, to safe operation of the boiler and unfavorable; If primary air flow is excessive, exceed minimum critical flowing saturation when fluidized-bed combustion boiler starts, easily cause again plasma ignition unstable, easily extinguish, extend the start-up time of boiler, add payment for initiation and use.
Summary of the invention
The invention provides a kind of circulating fluidized bed boiler bed material heating system, solve Properties of CFB unmanageable technical problem of primary air flow when boiler cold-state starts.
The present invention solves above technical problem by the following technical programs:
A kind of circulating fluidized bed boiler bed material heating system, comprise air channel, water cooled wind chamber and burner hearth, air distribution plate is provided with between water cooled wind chamber and burner hearth, igniting path is provided with between air channel and water cooled wind chamber, igniting path is provided with plasma igniter, air channel is provided with powder outlet, between the air channel, front end and water cooled wind chamber of igniting path, is provided with wind path communicating pipe, wind path communicating pipe is provided with adjustable gate.
When boiler ignition start, the aperture of adjustable gate is 30%-40%.
The present invention is when guaranteeing that the minimum critical flowing saturation of boiler is constant, and the adjustable air quantity by plasma igniter, guarantees that plasma catches fire stable, and Dynamic System is simple, convenient, is applicable to Properties of CFB and uses in boiler cold-state initial start stage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail:
A kind of circulating fluidized bed boiler bed material heating system, comprise air channel 1, water cooled wind chamber 3 and burner hearth 7, air distribution plate 6 is provided with between water cooled wind chamber 3 and burner hearth 7, path 9 of lighting a fire is provided with between air channel 1 and water cooled wind chamber 3, igniting path 9 is provided with plasma igniter 2, air channel 1 is provided with powder outlet 8, between the air channel, front end 1 and water cooled wind chamber 3 of igniting path 9, is provided with wind path communicating pipe 4, wind path communicating pipe 4 is provided with adjustable gate 5.
When boiler ignition start, the aperture of adjustable gate 4 is 30%-40%.
CFBB is generally adopt plasma ignition under bed technology, and in order to can startup safely and fast, the invention provides a kind of circulating fluidized bed boiler bed material heating system, this Dynamic System be simple, convenient, is applicable to initial start stage and uses.Wind path communicating pipe 4 is provided with between the air channel, front end 1 and water cooled wind chamber 3 of igniting path 9, wind path communicating pipe 4 is equipped with adjustable gate 5, the size of quantity-adjustable, part First air is separated in advance and enters water cooled wind chamber 3, mix with the flue gas after coal powder ignition, after mixing point is positioned at plasma igniter ignition point, so both ensure that and caught fire, met again the minimum critical flowing saturation of boiler.
Claims (2)
1. a circulating fluidized bed boiler bed material heating system, comprise air channel (1), water cooled wind chamber (3) and burner hearth (7), air distribution plate (6) is provided with between water cooled wind chamber (3) and burner hearth (7), path (9) of lighting a fire is provided with between air channel (1) and water cooled wind chamber (3), igniting path (9) is provided with plasma igniter (2), air channel (1) is provided with powder outlet (8), it is characterized in that, wind path communicating pipe (4) is provided with between the air channel, front end (1) and water cooled wind chamber (3) of igniting path (9), wind path communicating pipe (4) is provided with adjustable gate (5).
2. a kind of circulating fluidized bed boiler bed material heating system according to claim 1, is characterized in that, when boiler ignition start, the aperture of adjustable gate (4) is 30%-40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510774573.4A CN105299633A (en) | 2015-11-14 | 2015-11-14 | Bed material heating system for circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510774573.4A CN105299633A (en) | 2015-11-14 | 2015-11-14 | Bed material heating system for circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105299633A true CN105299633A (en) | 2016-02-03 |
Family
ID=55197212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510774573.4A Pending CN105299633A (en) | 2015-11-14 | 2015-11-14 | Bed material heating system for circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105299633A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1952478A (en) * | 2006-11-12 | 2007-04-25 | 东北电力大学 | High-temperature air lighting system under bed for fluidized bed and circulating fluidized bed boiler |
| CN201954535U (en) * | 2011-03-24 | 2011-08-31 | 烟台龙源电力技术股份有限公司 | Ignition air flue below circulating fluidized bed |
| CN204513368U (en) * | 2014-12-24 | 2015-07-29 | 日照金禾博源生化有限公司 | A kind of CFB Boiler road |
| CN105042577A (en) * | 2015-07-14 | 2015-11-11 | 河南科技大学 | Circulating fluidized bed boiler |
| CN205191553U (en) * | 2015-11-14 | 2016-04-27 | 国网山西省电力公司电力科学研究院 | Circulating fluidized bed boiler bed material heating system |
-
2015
- 2015-11-14 CN CN201510774573.4A patent/CN105299633A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1952478A (en) * | 2006-11-12 | 2007-04-25 | 东北电力大学 | High-temperature air lighting system under bed for fluidized bed and circulating fluidized bed boiler |
| CN201954535U (en) * | 2011-03-24 | 2011-08-31 | 烟台龙源电力技术股份有限公司 | Ignition air flue below circulating fluidized bed |
| CN204513368U (en) * | 2014-12-24 | 2015-07-29 | 日照金禾博源生化有限公司 | A kind of CFB Boiler road |
| CN105042577A (en) * | 2015-07-14 | 2015-11-11 | 河南科技大学 | Circulating fluidized bed boiler |
| CN205191553U (en) * | 2015-11-14 | 2016-04-27 | 国网山西省电力公司电力科学研究院 | Circulating fluidized bed boiler bed material heating system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160203 |