CN105650658B - A kind of low-level (stack-gas) economizer on-bne repair device and method - Google Patents
A kind of low-level (stack-gas) economizer on-bne repair device and method Download PDFInfo
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- CN105650658B CN105650658B CN201610154140.3A CN201610154140A CN105650658B CN 105650658 B CN105650658 B CN 105650658B CN 201610154140 A CN201610154140 A CN 201610154140A CN 105650658 B CN105650658 B CN 105650658B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2213/00—Chimneys or flues
- F23J2213/60—Service arrangements
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Abstract
The present invention proposes a kind of low-level (stack-gas) economizer on-bne repair device, including：Low-level (stack-gas) economizer, including low-level (stack-gas) economizer ontology, be set to the inlet flue duct of low-level (stack-gas) economizer ontology one end and be set to the exhaust pass of the low-level (stack-gas) economizer ontology other end；No leakage flue shut-off valve includes the first No leakage flue shut-off valve being connect with inlet flue duct and the second No leakage flue shut-off valve being connect with exhaust pass；Gas vent, including the first row stomata being set on inlet flue duct and the second row stomata being set on exhaust pass；Manhole door, including the first manhole door being set on inlet flue duct and the second manhole door being set on exhaust pass.Advantageous effect of the present invention：It does not shut down in unit when enabling low-level (stack-gas) economizer that leakage or other failures occur and is overhauled in time; increase low-level (stack-gas) economizer run time, reduce unit coal consumption, reduces pollutant discharge amount; unit safety is improved simultaneously, solves the contradiction of low-level (stack-gas) economizer maintenance and unit safety operation.
Description
Technical field
The present invention relates to energy saving for power plants and field of environment protection, a kind of low-level (stack-gas) economizer on-bne repair device and side are particularly related to
Method.
Background technology
Low-level (stack-gas) economizer (also referred to as smoke gas afterheat heat exchanger) is mounted in the heat transmission equipment of boiler back end ductwork, is to drop
Low fired power generating unit exhaust gas temperature improves the efficiency of dust collection of electric precipitation, improves generatine set heat efficiency, reduces unit generation coal consumption and rise
One of thermal power plant's ancillary equipment.More and more thermal power plants are mounted with low-level (stack-gas) economizer.
Due to corrosion, wear and equipment deficiency etc., low-level (stack-gas) economizer can usually be let out after operation a period of time
Leakage, great threat is brought to the safe operation of fired power generating unit.In general, after low-level (stack-gas) economizer leaks, by water side system into
Row isolation, low-level (stack-gas) economizer are stopped transport, unit normal operation, until unit carries out large repairs or when light maintenance compressor emergency shutdown, then are carried out low
The upkeep operation of warm economizer.In this way, breaking down from low-level (stack-gas) economizer to compressor emergency shutdown this period, the smoke evacuation of fired power generating unit
Temperature can be higher than exhaust gas temperature when low-level (stack-gas) economizer operation, and unit coal consumption can increase, especially for cooperation low temperature electric precipitation
If improving the low-level (stack-gas) economizer of efficiency of dust collection because failure is stopped transport, dust collection efficiency can be caused to decline, unit flue gas emission can not
Meet current discharge standard.
After low-level (stack-gas) economizer breaks down, how to carry out overhauling and resuming operation as early as possible in time, have become thermal motor
Group urgent problem.
Invention content
The present invention proposes a kind of low-level (stack-gas) economizer on-bne repair device and method, solves above-mentioned in the prior art ask
Topic.
The technical proposal of the invention is realized in this way：
A kind of low-level (stack-gas) economizer on-bne repair device, including：
Low-level (stack-gas) economizer, including low-level (stack-gas) economizer ontology, the inlet flue duct for being set to low-level (stack-gas) economizer ontology one end
With the exhaust pass for being set to the low-level (stack-gas) economizer ontology other end；
No leakage flue shut-off valve, include the first No leakage flue shut-off valve being connect with the inlet flue duct and with it is described
Second No leakage flue shut-off valve of exhaust pass connection；
Gas vent, including the first row stomata that is set on the inlet flue duct and be set on the exhaust pass the
Two gas vents；
Manhole door, including the first manhole door for being set on the inlet flue duct and be set on the exhaust pass the
Two manhole doors.
Further, low-level (stack-gas) economizer on-bne repair device of the present invention,
The inlet flue duct includes：
Inlet flue duct reducer is connect with low-level (stack-gas) economizer ontology one end, the first row stomata and described first
Manhole door is set on the inlet flue duct reducer；
Inlet flue duct ontology is connect with the inlet flue duct reducer, and the first No leakage flue shut-off valve is set to
On the inlet flue duct ontology；
The exhaust pass includes：
Exhaust pass reducer is connect with the low-level (stack-gas) economizer ontology other end, the second row stomata and described
Two manhole doors are set on the exhaust pass reducer；
Exhaust pass ontology is connect with the exhaust pass reducer, and the second No leakage flue shut-off valve is set to
On the exhaust pass ontology.
Preferably, the diameter of the inlet flue duct reducer is more than the diameter of the inlet flue duct ontology, the outlet cigarette
The diameter of road reducer is more than the diameter of the exhaust pass ontology.
Further, low-level (stack-gas) economizer on-bne repair device of the present invention further includes：
Bypass flue, one end are connect with the inlet flue duct, and the other end is connect with the exhaust pass, and are connected across described
On the outside of first No leakage flue shut-off valve and the second No leakage flue shut-off valve.
Further, low-level (stack-gas) economizer on-bne repair device of the present invention further includes：
Elastic sealing device is set to the inlet flue duct and the first No leakage flue shut-off valve and the outlet cigarette
Between road and the second No leakage flue shut-off valve.
A kind of repair method based on above-mentioned low-level (stack-gas) economizer on-bne repair device, includes the following steps：
The inlet flue duct is set in low-level (stack-gas) economizer ontology one end, is set in the low-level (stack-gas) economizer ontology other end
Set the exhaust pass；
The first No leakage flue shut-off valve is set on the inlet flue duct, on the exhaust pass described in setting
Second No leakage flue shut-off valve；
The first row stomata is set on the inlet flue duct, the second exhaust is set on the exhaust pass
Hole；
First manhole door is set on the inlet flue duct, second manhole is set on the exhaust pass
Door；
When the low-level (stack-gas) economizer ontology normal operation, the first No leakage flue shut-off valve and described second are opened
No leakage flue shut-off valve；
When the low-level (stack-gas) economizer ontology breaks down, the first No leakage flue shut-off valve and described second are closed
No leakage flue shut-off valve, so that the low-level (stack-gas) economizer ontology is isolated with the inlet flue duct and the exhaust pass, to institute
It states low-level (stack-gas) economizer ontology and carries out on-bne repair.
Further, described when the low-level (stack-gas) economizer ontology breaks down, it closes the first No leakage flue and cuts
Only valve and the second No leakage flue shut-off valve, so that the low-level (stack-gas) economizer ontology and the inlet flue duct and the outlet
Flue is isolated, and is specifically included to the step of low-level (stack-gas) economizer ontology progress on-bne repair：
When the low-level (stack-gas) economizer ontology breaks down, the first No leakage flue shut-off valve and described second are closed
No leakage flue shut-off valve, the inlet flue duct and the exhaust pass is isolated；
The first row stomata and first manhole door being set on the inlet flue duct are opened, and is set to institute
The second row stomata on exhaust pass and second manhole door are stated, so that the segregate low-level (stack-gas) economizer ontology is fast
Quickly cooling is but；
After the low-level (stack-gas) economizer ontology cools down, service personnel enters first manhole door and/or second people
Hole door overhauls the low-level (stack-gas) economizer ontology；
After to the low-level (stack-gas) economizer ontology on-bne repair, the first row stomata and first manhole are closed
Door and the second row stomata and second manhole door, open the first No leakage flue shut-off valve and described second
No leakage flue shut-off valve.
Beneficial effects of the present invention are：
Low-level (stack-gas) economizer on-bne repair device and method of the present invention makes low-level (stack-gas) economizer that leakage or other events occur
Upkeep operation can be carried out in time in the case that unit is non-stop-machine when barrier, restore low-level (stack-gas) economizer operation as early as possible, increase low temperature and save
The run time of coal device, reduce unit coal consumption, reduce the pollutant discharge amount of thermal power plant, it is ensured that fired power generating unit coal consumption for power generation,
The index of the various aspects such as dust emission keeps normal, while improving unit safety, has well solved low-level (stack-gas) economizer maintenance
Contradiction between unit safety operation.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of low-level (stack-gas) economizer on-bne repair device of the present invention.
In figure：
1, low-level (stack-gas) economizer ontology；2, inlet flue duct；21, inlet flue duct reducer；22, inlet flue duct ontology；3, it exports
Flue；31, exhaust pass reducer；32, exhaust pass ontology；4, the first No leakage flue shut-off valve；5, the second No leakage cigarette
Road shut-off valve；6, first row stomata；7, second row stomata；8, the first manhole door；9, the second manhole door.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of low-level (stack-gas) economizer on-bne repair device of the present invention, including：
Low-level (stack-gas) economizer, including low-level (stack-gas) economizer ontology 1,2 and of inlet flue duct for being set to 1 one end of low-level (stack-gas) economizer ontology
It is set to the exhaust pass 3 of 1 other end of low-level (stack-gas) economizer ontology；
No leakage flue shut-off valve, include the first No leakage flue shut-off valve 4 being connect with inlet flue duct 2 and with outlet cigarette
The second No leakage flue shut-off valve 5 that road 3 connects；
Gas vent, including the first row stomata 6 being set on inlet flue duct 2 and the second row being set on exhaust pass 3
Stomata 7；
Manhole door, including what is be set on inlet flue duct 2 first manhole door 8 and the second people for being set on exhaust pass 3
Hole door 9.
Low-level (stack-gas) economizer on-bne repair device of the present invention,
The inlet flue duct 2 may include：
Inlet flue duct reducer 21 is connect with 1 one end of low-level (stack-gas) economizer ontology, and first row stomata 6 and the first manhole door 8 are set
It is placed on inlet flue duct reducer 21；
Inlet flue duct ontology 22 is connect with inlet flue duct reducer 21, and the first No leakage flue shut-off valve 4 is set to import
On flue ontology 22；
The exhaust pass 3 may include：
Exhaust pass reducer 31 is connect with 1 other end of low-level (stack-gas) economizer ontology, second row stomata 7 and the second manhole door 9
It is set on exhaust pass reducer 31；
Exhaust pass ontology 32 is connect with exhaust pass reducer 31, and the second No leakage flue shut-off valve 5 is set to outlet
On flue ontology 32.
Wherein it is preferred to which the diameter of the inlet flue duct reducer 21 is more than the diameter of inlet flue duct ontology 22, cigarette is exported
The diameter of road reducer 31 is more than the diameter of exhaust pass ontology 32.
Low-level (stack-gas) economizer on-bne repair device of the present invention can also include：
Bypass flue, one end are connect with inlet flue duct 2, and the other end is connect with exhaust pass 3, and are connected across the first No leakage
5 outside of flue shut-off valve 4 and the second No leakage flue shut-off valve.
For the unit for the more low-level (stack-gas) economizer on-bne repair devices of the present invention that are arranged in parallel, boiler smoke can lead to
It crosses other flues and enters upstream device；For only arranging the machine of a low-level (stack-gas) economizer on-bne repair device of the present invention
Group, boiler smoke can enter upstream device by the bypass flue of setting.In addition, making arrangement separate unit by the way that bypass flue is arranged
The unit of low-level (stack-gas) economizer on-bne repair device of the present invention still can continue to run with after being isolated.
Low-level (stack-gas) economizer on-bne repair device of the present invention can also include：
Elastic sealing device is set to inlet flue duct 2 and the first No leakage flue shut-off valve 4 and exhaust pass 3 and second
Between No leakage flue shut-off valve 5.
Low-level (stack-gas) economizer on-bne repair device of the present invention, inlet flue duct 2 and the first No leakage flue shut-off valve 4 and
Elastic sealing device, bullet when No leakage flue shut-off valve is closed are equipped between exhaust pass 3 and the second No leakage flue shut-off valve 5
Property sealing device and No leakage flue shut-off valve be in close contact, smoke spillage can be made to be less than 1%, meet on-bne repair requirement, bullet
Property sealing device is specifically as follows elastic slide block.
A kind of repair method based on above-mentioned low-level (stack-gas) economizer on-bne repair device, includes the following steps：
Inlet flue duct 2 is set in 1 one end of low-level (stack-gas) economizer ontology, outlet cigarette is set in 1 other end of low-level (stack-gas) economizer ontology
Road 3；
First No leakage flue shut-off valve 4 is set on inlet flue duct 2, the second No leakage cigarette is set on exhaust pass 3
Road shut-off valve 5；
First row stomata 6 is set on inlet flue duct 2, second row stomata 7 is set on exhaust pass 3；
First manhole door 8 is set on inlet flue duct 2, the second manhole door 9 is set on exhaust pass 3；
When low-level (stack-gas) economizer 1 normal operation of ontology, the first No leakage flue shut-off valve 4 and the second No leakage flue are opened
Shut-off valve 5；
When low-level (stack-gas) economizer ontology 1 breaks down, the first No leakage flue shut-off valve 4 and the second No leakage flue are closed
Shut-off valve 5 carries out low-level (stack-gas) economizer ontology 1 so that low-level (stack-gas) economizer ontology 1 is isolated with inlet flue duct 2 and exhaust pass 3
Line overhauls.
Wherein, it when low-level (stack-gas) economizer ontology 1 breaks down, closes the first No leakage flue shut-off valve 4 and the second nothing is let out
Flue shut-off valve 5 is leaked, so that low-level (stack-gas) economizer ontology 1 is isolated with inlet flue duct 2 and exhaust pass 3, to low-level (stack-gas) economizer ontology 1
The step of carrying out on-bne repair can specifically include：
When low-level (stack-gas) economizer ontology 1 breaks down, the first No leakage flue shut-off valve 4 and the second No leakage flue are closed
Shut-off valve 5, inlet flue duct 2 and exhaust pass 3 is isolated；
The first row stomata 6 and the first manhole door 8 being set on inlet flue duct 2 are opened, and is set on exhaust pass 3
Second row stomata 7 and the second manhole door 9 so that segregate low-level (stack-gas) economizer ontology 1 is cooling rapidly；
After low-level (stack-gas) economizer ontology 1 cools down, service personnel enters the first manhole door 8 and/or the second manhole door 9 to low temperature
Economizer ontology 1 is overhauled；
After 1 on-bne repair of low-level (stack-gas) economizer ontology, first row stomata 6 and the first manhole door 8 and second are closed
Gas vent 7 and the second manhole door 9 open the first No leakage flue shut-off valve 4 and the second No leakage flue shut-off valve 5.
Low-level (stack-gas) economizer on-bne repair device and method of the present invention makes low-level (stack-gas) economizer that leakage or other events occur
Upkeep operation can be carried out in time in the case that unit is non-stop-machine when barrier, restore low-level (stack-gas) economizer operation as early as possible, increase low temperature and save
The run time of coal device, reduce unit coal consumption, reduce the pollutant discharge amount of thermal power plant, it is ensured that fired power generating unit coal consumption for power generation,
The index of the various aspects such as dust emission keeps normal, while improving unit safety, has well solved low-level (stack-gas) economizer maintenance
Contradiction between unit safety operation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (3)
1. a kind of low-level (stack-gas) economizer on-bne repair device, which is characterized in that including：
Low-level (stack-gas) economizer, including low-level (stack-gas) economizer ontology (1), the import cigarette for being set to described low-level (stack-gas) economizer ontology (1) one end
Road (2) and the exhaust pass (3) for being set to low-level (stack-gas) economizer ontology (1) other end；
No leakage flue shut-off valve, include the first No leakage flue shut-off valve (4) being connect with the inlet flue duct (2) and with institute
State the second No leakage flue shut-off valve (5) of exhaust pass (3) connection；
Gas vent, including the first row stomata (6) that is set on the inlet flue duct (2) and it is set to the exhaust pass (3)
On second row stomata (7)；
Manhole door, including the first manhole door (8) for being set on the inlet flue duct (2) and it is set to the exhaust pass (3)
On the second manhole door (9)；
Bypass flue, one end are connect with the inlet flue duct (2), and the other end is connect with the exhaust pass (3), and is connected across institute
It states on the outside of the first No leakage flue shut-off valve (4) and the second No leakage flue shut-off valve (5)；
Elastic sealing device is set to the inlet flue duct (2) and the first No leakage flue shut-off valve (4) and the outlet
Between flue (3) and the second No leakage flue shut-off valve (5)；
Wherein,
The inlet flue duct (2) includes：
Inlet flue duct reducer (21) is connect, the first row stomata (6) and institute with described low-level (stack-gas) economizer ontology (1) one end
The first manhole door (8) is stated to be set on the inlet flue duct reducer (21)；
Inlet flue duct ontology (22) is connect with the inlet flue duct reducer (21), the first No leakage flue shut-off valve (4)
It is set on the inlet flue duct ontology (22)；
The exhaust pass (3) includes：
Exhaust pass reducer (31) is connect with low-level (stack-gas) economizer ontology (1) other end, the second row stomata (7) and
Second manhole door (9) is set on the exhaust pass reducer (31)；
Exhaust pass ontology (32) is connect with the exhaust pass reducer (31), the second No leakage flue shut-off valve (5)
It is set on the exhaust pass ontology (32)；
The diameter of the inlet flue duct reducer (21) is more than the diameter of the inlet flue duct ontology (22), and the exhaust pass becomes
The diameter of diameter section (31) is more than the diameter of the exhaust pass ontology (32).
2. a kind of repair method based on low-level (stack-gas) economizer on-bne repair device described in claim 1, which is characterized in that including
Following steps：
In described low-level (stack-gas) economizer ontology (1) one end, the inlet flue duct (2) is set, it is another in the low-level (stack-gas) economizer ontology (1)
The exhaust pass (3) is arranged in one end；
The first No leakage flue shut-off valve (4) is set on the inlet flue duct (2), is set on the exhaust pass (3)
Set the second No leakage flue shut-off valve (5)；
The first row stomata (6) is set on the inlet flue duct (2), is arranged described second on the exhaust pass (3)
Gas vent (7)；
First manhole door (8) is set on the inlet flue duct (2), is arranged described second on the exhaust pass (3)
Manhole door (9)；
When low-level (stack-gas) economizer ontology (1) normal operation, the first No leakage flue shut-off valve (4) and described the are opened
Two No leakage flue shut-off valves (5)；
When the low-level (stack-gas) economizer ontology (1) is broken down, the first No leakage flue shut-off valve (4) and described the are closed
Two No leakage flue shut-off valves (5), so that the low-level (stack-gas) economizer ontology (1) and the inlet flue duct (2) and the outlet cigarette
Road (3) is isolated, and on-bne repair is carried out to the low-level (stack-gas) economizer ontology (1).
3. the repair method of low-level (stack-gas) economizer on-bne repair device according to claim 2, which is characterized in that described to work as institute
When stating low-level (stack-gas) economizer ontology (1) failure, the first No leakage flue shut-off valve (4) and second No leakage are closed
Flue shut-off valve (5) so that the low-level (stack-gas) economizer ontology (1) and the inlet flue duct (2) and the exhaust pass (3) every
From, to the low-level (stack-gas) economizer ontology (1) carry out on-bne repair the step of specifically include：
When the low-level (stack-gas) economizer ontology (1) is broken down, the first No leakage flue shut-off valve (4) and described the are closed
Two No leakage flue shut-off valves (5), the inlet flue duct (2) and the exhaust pass (3) is isolated；
Opening is set to the first row stomata (6) and first manhole door (8) on the inlet flue duct (2), Yi Jishe
The second row stomata (7) and second manhole door (9) being placed on the exhaust pass (3), so that segregate described
Low-level (stack-gas) economizer ontology (1) is cooling rapidly；
After the low-level (stack-gas) economizer ontology (1) is cooling, service personnel enters first manhole door (8) and/or described second
Manhole door (9) overhauls the low-level (stack-gas) economizer ontology (1)；
After to low-level (stack-gas) economizer ontology (1) on-bne repair, the first row stomata (6) and first manhole are closed
Door (8) and the second row stomata (7) and second manhole door (9), open the first No leakage flue shut-off valve
(4) and the second No leakage flue shut-off valve (5).
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| KR100868997B1 (en) * | 2007-07-26 | 2008-11-17 | 정진희 | That the economizer attached the efficient boiler |
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| CN1321850A (en) * | 2000-04-29 | 2001-11-14 | 蒋艺 | High energy-saving residual-heat exchanger |
| CN2851881Y (en) * | 2005-12-19 | 2006-12-27 | 大庆石油管理局 | Inspection hole for boiler |
| CN205535888U (en) * | 2016-03-17 | 2016-08-31 | 北京赫宸环境工程股份有限公司 | Low -level (stack -gas) economizer overhauls device on line |
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Denomination of invention: An on-line maintenance device and method for low temperature economizer Effective date of registration: 20220928 Granted publication date: 20181002 Pledgee: Bank of China Limited Jingdezhen Branch|Jingdezhen branch of Postal Savings Bank of China Ltd. Pledgor: Jiangxi hechen Technology Co.,Ltd. Registration number: Y2022990000659 |