CN206582837U - It is a kind of to prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking - Google Patents
It is a kind of to prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking Download PDFInfo
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- CN206582837U CN206582837U CN201720138519.5U CN201720138519U CN206582837U CN 206582837 U CN206582837 U CN 206582837U CN 201720138519 U CN201720138519 U CN 201720138519U CN 206582837 U CN206582837 U CN 206582837U
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- airduct
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- external bed
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Abstract
It is a kind of to prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking, including electric control valve, upper manual modulation valve, lower manual modulation valve, standpipe lubrication airduct and side wall lubrication airduct；The electric control valve, upper manual modulation valve, lower manual governor valve control lubricates the flow and pressure head of wind；Described standpipe lubrication airduct is installed around standpipe, and branch pipe is equally spaced；Branch pipe on described side wall lubrication airduct is arranged in external bed housing side wall and partition wall, and above structure collectively forms lubrication wind apparatus, can intermittently or serially run；The utility model effectively controls the circulating ash returning charge amount of standpipe and external bed, the problem of solving CFB boiler external bed high-temperature coking, so that it is guaranteed that the safe and reliable operation of external bed.
Description
Technical field
The utility model is related to recirculating fluidized bed (CFB) boiler technical field of power generation, and more particularly to one kind prevents CFB boiler
The lubrication wind apparatus of external bed high-temperature coking.
Background technology
With the fast development of CFB boiler the Enlargement Tendency, in order to make up the problem of heating surface is not enough, external bed turns into big
The essential equipment of type CFB boiler.Generally it is disposed with 4~6 external heat exchangers outside CFB boiler stove, abbreviation external bed, outside
Put bed to be typically made up of 5 air compartments, respectively distributor chamber, high temperature recycling room, equal flow chamber, Heat Room and low temperature feed back room.Distribution
Room, high temperature recycling room, equal flow chamber be high-temperature area, temperature between 800~1000 DEG C, Heat Room be disposed with high temperature reheater or
Person's low temperature superheater, low temperature feed back room temperature is between 400~600 DEG C.Traditional external bed is only arranged in each air compartment bottom
Air distribution plate and blast cap, it is other again without air intake.When boiler runs into ash coal kind, circulating ash quantity increase causes high temperature recycling room
Grey mobility is deteriorated, so as to trigger coking.Li Kezhang etc. exists《The analysis of 300MW CFBB dipleg cokings》Point out material
Coking is almost blocked leg (standpipe) causes blowing out；What illumination etc. exists《300MW CFBB outer circulation feed back abnormal causes
Analysis》In it has also been found that hardened thing is the reason for causing CFBB outer circulation feed back abnormal in external bed.Currently, it is large-scale
External bed for circulating fluidized bed boiler is only provided with outside air distribution plate in bottom, and facility is being lubricated without other circulating ash, external bed and vertical
There is circulating ash flowing inequality, occur coking problem in pipe.
The content of the invention
In order to overcome the defect of above-mentioned prior art, the purpose of this utility model is that providing one kind prevents outside CFB boiler
The lubrication wind apparatus of a high-temperature coking is put, to solve the not smooth even coking problem of external bed blanking in the prior art.
In order to achieve the above object, the utility model is adopted the following technical scheme that：
It is a kind of to prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking, including the electricity being arranged in lubrication wind main pipe
Dynamic regulating valve 1, be arranged on the upper manual modulation valve 2 that on lubrication wind main pipe branch road is connected and is in parallel with electric control valve 1 and under
Manual modulation valve 5, the multi-turn standpipe lubrication airduct 4 being arranged on the branch road of lubrication wind main pipe one is connected with upper manual modulation valve 2, with
Lower manual modulation valve 5 connects the side wall lubrication airduct 6 being arranged on lubrication another branch road of wind main pipe；The multi-turn standpipe lubricates wind
Pipe 4 arranges there is multiple branch pipes, side wall profit on multi-turn standpipe lubrication airduct 4 and side wall the lubrication airduct 6 around external bed standpipe
The branch pipe of sliding airduct 6 is arranged in the side wall of external bed housing 11 and partition wall 8, and branch pipe shower nozzle is stretched into distributor chamber 7.
It is described lubrication wind apparatus can intermittently operated and continuous operation, pass through electric control valve 1 and upper manual modulation valve 2
Control the flow and pressure head of lubrication wind respectively with lower manual modulation valve 5.
Branch pipe on standpipe lubrication airduct 4 and side wall lubrication airduct 6 selects ZGCr25Ni20 heat-resisting steels, have 30~
60 ° are angled downward.
The standpipe lubrication airduct 4 is enclosed at least about standpipe arrangement two, is often equally spaced 4~8 branch pipes on circle.
Of length no more than 20mm that the shower nozzle of the side wall lubrication branch pipe of airduct 6 is stretched into distributor chamber 7.
It is described lubrication wind apparatus slagging prevention method be：By the control lubrication wind flow of electric control valve 1, then by upper
The pressure head of manual modulation valve 2 and lower manual modulation valve 5 control lubrication wind so that the pressure difference of external bed is just and temperature is no more than
900℃；About 900 DEG C of high temperature ash is fed from the ash inlet 3 of separator standpipe, and lubrication wind lubricates airduct 4 and side wall profit from standpipe
Sliding airduct 6 is sprayed into, and airflow layer is formed on the surface of external bed housing 11, and high temperature ash is lubricated prevents the grey coking of high temperature, is entered
Enter the ash of the high temperature in external bed distributor chamber 7 to climb over partition wall 8 in bubbling state in external bed and transfer heat to heat exchanger 10,
Temperature is reduced to 400~600 DEG C, is discharged from ash hole 9.
The beneficial effects of the utility model：
1) the utility model prevents the lubrication wind apparatus of CFB boiler external bed high-temperature coking, can be according to boiler circulating ash
Amount is how many intermittently or serially to be put into.
2) the utility model prevents the lubrication wind apparatus of CFB boiler external bed high-temperature coking, and wind regime uses hp fluid air,
Simple system, reliable and stable, cost of investment is low.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Wherein：Adjusted manually under 1- electric control valves, the upper manual modulation valves of 2-, 3- ash inlets, 4- standpipes lubrication airduct, 5-
Valve, 6- side walls lubrication airduct, 7- external bed distributor chambers, 8- partition walls, 9- ash holes, 10- heat exchangers, 11- external bed housings, 12-
Blast cap.
Embodiment
The utility model is described in detail below in conjunction with the accompanying drawings：
As shown in figure 1, the utility model includes electric control valve 1, upper manual modulation valve 2, ash inlet 3, standpipe lubrication wind
Pipe 4, lower manual modulation valve 5, side wall lubrication airduct 6, external bed distributor chamber 7, partition wall 8, ash hole 9, heat exchanger 10, external bed shell
Body 11, blast cap 12.Being arranged in external bed housing 11 has partition wall 8, heat exchanger 10, blast cap 12.Wind is lubricated through electric control valve 1
It is passed through, each leads into standpipe lubrication airduct 4 by upper manual modulation valve 2 and lower manual modulation valve 5 and side wall lubricates airduct 6, lead to
Cross the flow and pressure head of electric control valve 1, upper manual modulation valve 2 and lower manual modulation valve 5 control lubrication wind so that external bed
Pressure difference is just to be no more than 900 DEG C with temperature.Standpipe of the present embodiment standpipe lubrication airduct 4 around the lower section of ash inlet 3 is disposed with two
Circle, often encloses and is arranged symmetrically six branch pipes for tilting down 45 °.The branch pipe that side wall lubrication airduct 6 is connected is arranged in housing 11
On side wall and partition wall 8, branch tube head is inserted into distributor chamber 7, and insertion depth is no more than 20mm, branch pipe material selection
ZGCr25Ni20 heat-resisting steels.About 900 DEG C of high temperature ash is fed from the ash inlet 3 of separator standpipe, and lubrication wind lubricates from standpipe
Airduct 4 and side wall lubrication airduct 6 are sprayed into, and form airflow layer on the surface of external bed housing 11, and high temperature ash is lubricated prevented
High temperature ash coking, climbs over partition wall 8 in bubbling state in external bed into the high temperature ash in external bed distributor chamber 7 and passes heat
Heat exchanger 10 is passed, temperature is reduced to 400~600 DEG C, is discharged from ash hole 9.
Claims (4)
1. a kind of prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking, it is characterised in that：It is female including being arranged on lubrication wind
Electric control valve (1) on pipe, is arranged on be connected and be in parallel with electric control valve (1) on lubrication wind main pipe branch road upper manual
Regulating valve (2) and lower manual modulation valve (5), be connected with upper manual modulation valve (2) be arranged on it is many on the branch road of lubrication wind main pipe one
Standpipe lubrication airduct (4) is enclosed, the side wall lubrication wind being arranged on lubrication another branch road of wind main pipe is connected with lower manual modulation valve (5)
Manage (6)；The multi-turn standpipe lubrication airduct (4) arranges that the multi-turn standpipe lubricates airduct (4) and side wall around external bed standpipe
There are many Heavenly Stems and Earthly Branches pipes on lubrication airduct (6), the branch pipe of side wall lubrication airduct (6) is arranged in the side wall and partition wall of external bed housing (11)
(8) in, branch pipe shower nozzle is stretched into distributor chamber (7).
2. it is according to claim 1 it is a kind of prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking, its feature exists
In：Standpipe lubrication airduct (4) and side wall lubricate branch pipe on airduct (6) from ZGCr25Ni20 heat-resisting steels, have 30~
60 ° are angled downward.
3. it is according to claim 1 it is a kind of prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking, its feature exists
In：The standpipe lubrication airduct (4) is enclosed at least about standpipe arrangement two, is often equally spaced 4~8 branch pipes on circle.
4. it is according to claim 1 it is a kind of prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking, its feature exists
In：Of length no more than 20mm that the shower nozzle of described side wall lubrication airduct (6) branch pipe is stretched into distributor chamber (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720138519.5U CN206582837U (en) | 2017-02-16 | 2017-02-16 | It is a kind of to prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720138519.5U CN206582837U (en) | 2017-02-16 | 2017-02-16 | It is a kind of to prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking |
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| Publication Number | Publication Date |
|---|---|
| CN206582837U true CN206582837U (en) | 2017-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720138519.5U Active CN206582837U (en) | 2017-02-16 | 2017-02-16 | It is a kind of to prevent the lubrication wind apparatus of CFB boiler external bed high-temperature coking |
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| Country | Link |
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| CN (1) | CN206582837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678785A (en) * | 2017-02-16 | 2017-05-17 | 中国华能集团清洁能源技术研究院有限公司 | Lubricating air device for preventing coking of external bed of CFB boiler at high temperature |
-
2017
- 2017-02-16 CN CN201720138519.5U patent/CN206582837U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678785A (en) * | 2017-02-16 | 2017-05-17 | 中国华能集团清洁能源技术研究院有限公司 | Lubricating air device for preventing coking of external bed of CFB boiler at high temperature |
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