CN206695102U - A kind of back pressure thermal power plant unit is without activated vapor system - Google Patents
A kind of back pressure thermal power plant unit is without activated vapor system Download PDFInfo
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- CN206695102U CN206695102U CN201720294421.9U CN201720294421U CN206695102U CN 206695102 U CN206695102 U CN 206695102U CN 201720294421 U CN201720294421 U CN 201720294421U CN 206695102 U CN206695102 U CN 206695102U
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- instrument
- boiler
- pipeline
- purging
- power plant
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Abstract
The utility model discloses a kind of utility model to provide a kind of back pressure thermal power plant unit without activated vapor system, including boiler fuel feed pump, boiler oil return pipe, medium purging pipeline, instrument are with purging pipeline, instrument with gas non-return valve, steam blowing interface, compressed air interface and instrument air compressor.This increases instrument purging pipeline without activated vapor system on the medium purging pipeline of boiler, when oil gun exits, compressed air replacement boiler auxiliary steam is produced with air compressor to purge oil pipe, realize the startup scheme of no activated vapor boiler, effectively reduce system cost using instrument.
Description
Technical field
A kind of boiler start-up system is the utility model is related to, especially a kind of back pressure thermal power plant unit that is used for is without activated vapor system
System.
Background technology
At present, domestic newly-built fired power generating unit is in order to ensure boiler, steam turbine equipment safety and the requirement for reaching technological effect,
In unit regulation operation primary starting（Cold conditions and hot）In the presence of extensive steam use demand, steamed as ignition of the boiler oil gun purges
Vapour, boiler heating surface boiler sootblowing steam, boiler acid pickling heating steam, steam turbine oxygen-eliminating device heating steam etc..At present typically by setting
Put the needs that starting trouble ensures startup vapour.But starting trouble initial investment is larger, and operation expense is higher.
Though starting trouble is small but special messenger need to be arranged to carry out the startup, stoppage in transit and tours of inspection of the boiler, greatly increase pair
The demand of Field Force, improves human cost.After unit operation, to ensure that starting trouble is well standby, subsequently
High operating cost and a large amount of maintenance maintenances are also needed to, in the long run, it is also necessary to including scrapping removal cost with future
Deng.
The content of the invention
Purpose of utility model：There is provided it is a kind of for back pressure thermal power plant unit without activated vapor system, so as to overcome startup pot
The problem of stove initial investment is larger, and operation expense is higher.
Technical scheme：The utility model provides a kind of back pressure thermal power plant unit without activated vapor system, including boiler fuel feeding
Pipe, boiler oil return pipe, medium purging pipeline, instrument are connect with purging pipeline, instrument with gas non-return valve, steam blowing interface, compressed air
Mouth and instrument air compressor；
Compressed air interface is connected to the air inlet of instrument air compressor by pipeline；The outlet of instrument air compressor
Mouth is connected to medium with purging pipeline by instrument and purges pipeline；Instrument is arranged on instrument purging pipeline with gas non-return valve；Steam blows
Sweep interface to be connected at the air inlet of medium purging pipeline, and manually-operated gate is provided with steam blowing interface；Medium scavenging conduit
The gas outlet connection boiler oil return pipe in road；Boiler oil return pipe is connected to boiler fuel feed pump by check-valves；On boiler fuel feed pump
It is serially connected with a check-valves；Boiler fuel feed pump is used to be connected with boiler.
Using the increase instrument purging pipeline on the medium of boiler purging pipeline（Boiler compressed air is divided to two kinds, instrument use and
Station-service, take instrument with the purpose of air to be instrument and improve its quality with techniques such as the filtered, condensations of gas, impurity content is less, prevents from purging
During Oil gun head block）, when oil gun exits, produce compressed air with air compressor using instrument and substitute boiler auxiliary steam
Oil pipe is purged, the startup scheme of no activated vapor boiler is realized, effectively reduces system cost；Blown using in steam
Sweep interface and manually-operated gate is set, can be replaced in compressed air and oil pipe is carried out to purge closed dielectric purging pipeline, prevent gas leakage
Influence purging effect；It can prevent boiler auxiliary steam door from opening by mistake steam is poured into instrument gas system using instrument gas non-return valve,
Instrument steam contamination is caused, avoids instrument from being damaged with air compressor；Using two check-valves can fuel feeding and purging when it is mutual
Isolation, prevents from interfering.
As further limits scheme of the present utility model, it is manual with purging pipeline a pipeline to be up to additionally provided with less in instrument
Valve.The break-make controllability of instrument purging pipeline can effectively be strengthened using pipeline manually-operated gate, it is ensured that safe handling.
As further limits scheme of the present utility model, the pipe between compressed air interface and instrument air compressor
At least provided with an air inlet manually-operated gate on road.Instrument air compressor conveniently can be opened and cut off using air inlet manually-operated gate
Intake channel, prevent pollute air enter, there is preferable barrier propterty.
As further limits scheme of the present utility model, fuel feeding manually-operated gate and fuel feeding are additionally provided with boiler fuel feed pump
Angle valve.Break-make controllability to boiler fuel feed pump can be strengthened using fuel feeding manually-operated gate and fuel feeding angle valve.
As further limits scheme of the present utility model, purging manually-operated gate and purging are additionally provided with boiler oil return pipe
Angle valve.Using purging manually-operated gate and purge break-make controllability when angle valve can strengthen purging in boiler oil return pipe.
Compared with prior art, its advantage is the utility model：Increase using on the medium of boiler purging pipeline
Instrument purging pipeline（Boiler compressed air is divided to two kinds, and instrument is used and station-service, and it with the purpose of air is that instrument gas is filtered, condensation to take instrument
Its quality is improved etc. technique, impurity content is less, prevents that Oil gun head blocks in purge）, when oil gun exits, used using instrument
Air compressor produces compressed air replacement boiler auxiliary steam and oil pipe is purged, and realizes opening for no activated vapor boiler
Dynamic scheme, effectively reduces system cost；Using steam blowing interface set manually-operated gate, can compressed air for pair
Oil pipe carries out purging closed dielectric purging pipeline, prevents gas leakage effect purging effect；Pot can be prevented using instrument gas non-return valve
Stove auxiliary steam door, which opens by mistake, makes steam pour into instrument gas system, causes instrument steam contamination, avoids instrument from being damaged with air compressor；
Using two check-valves can fuel feeding and purging when it is mutually isolated, prevent from interfering.
Brief description of the drawings
Fig. 1 is system structure diagram of the present utility model.
In figure：1st, boiler, 2, boiler fuel feed pump, 3, boiler oil return pipe, 4, fuel feeding main pipe, 5, oil return main pipe, 6, medium blows
Sweep pipeline, 7, instrument purging pipeline, 8, oil pump, 9, oil tank, 10, instrument gas non-return valve, 11, steam blowing interface, 12, compression it is empty
Gas interface, 13, instrument air compressor, 14, check-valves, 15, fuel feeding angle valve, 16, enter oil flowmeter, 17, oil return safety cut-off
Valve, 18, return flow meter, 19, regulating valve, 20, oil-feed safety cut-off valve, 21, purging angle valve.
Embodiment
Technical solutions of the utility model are described in detail below in conjunction with the accompanying drawings, but the scope of protection of the utility model
It is not limited to the embodiment.
Embodiment 1：
As shown in figure 1, back pressure thermal power plant unit disclosed in the utility model is without activated vapor system, including boiler fuel feed pump 2,
Boiler oil return pipe 3, medium purging pipeline 6, instrument purging pipeline 7, instrument gas non-return valve 10, steam blowing interface 11, compression are empty
Gas interface 12 and instrument air compressor 13；
Wherein, compressed air interface 12 is connected to the air inlet of instrument air compressor 13 by pipeline；Instrument air pressure
The gas outlet of contracting machine 13 purges pipeline 7 by instrument and is connected to medium purging pipeline 6；Instrument gas non-return valve 10 is arranged on instrument with blowing
Sweep on pipeline 7；Steam blowing interface 11 is connected at the air inlet of medium purging pipeline 6, and is set at steam blowing interface 11
There is manually-operated gate；The gas outlet connection boiler oil return pipe 3 of medium purging pipeline 6；Boiler oil return pipe 3 is connected to by check-valves 14
On boiler fuel feed pump 2, and a check-valves 14 also is provided with boiler fuel feed pump 2；Boiler fuel feed pump 2 is used to be connected with boiler 1；
In instrument a pipeline manually-operated gate is at least additionally provided with purging pipeline 7；In compressed air interface 12 and instrument air compressor
At least provided with an air inlet manually-operated gate on pipeline between 13；Fuel feeding manually-operated gate and confession are additionally provided with boiler fuel feed pump 2
Oily angle valve 15；Purging manually-operated gate and purging angle valve 21 are additionally provided with boiler oil return pipe 3.
Back pressure thermal power plant unit disclosed in the utility model is without activated vapor system when installing and using, it is necessary to be arranged on existing
Steam generator system on, steam generator system include boiler 1, boiler fuel feed pump 2, boiler oil return pipe 3, fuel feeding main pipe 4, oil return main pipe 5, oil
Pump 8, oil tank 9, regulating valve 19, oil-feed safety cut-off valve 20, enter oil flowmeter 16, oil return safety cut-off valve 17 and return flow
Meter 18；Regulating valve 19, oil-feed safety cut-off valve 20, enter oil flowmeter 16 and oil pump 8 is sequentially connected in series in fuel feeding main pipe 4；For
One end connection boiler fuel feed pump 2 of oily main pipe 4, the other end is connected at the oil-out of oil tank 9；Oil return safety cut-off valve 17 and
Return flow meter 18 is serially connected in oil return main pipe 5；One end of oil return main pipe 5 is connected on boiler fuel feed pump 2, and the other end is connected to
At the oil return opening of oil tank 9；In regulating valve 19, enter at oil flowmeter 16, oil return safety cut-off valve 17 and return flow meter 18 all
It has been installed in parallel manually-operated gate.
Boiler 1 during oil gun deactivation, need to be purged, purpose is prevented during start-up course with auxiliary steam to oil gun oil-piping
Only pipeline trapped fuel causes spontaneous combustion and nozzles the accident such as to be carbonized, but in view of the startup stage of boiler 1 without auxiliary steam, in order to prevent oil pipe
The generation of road trapped fuel firing accident, increase instrument purging pipeline 7 on the medium purging pipeline 6 of boiler 1（Boiler compressed air point
Two kinds, instrument is used and station-service, takes instrument with the purpose of air to be instrument and improves its quality with techniques such as the filtered, condensations of gas, impurity content compared with
It is few, prevent that Oil gun head blocks in purge）, when oil gun exits, compressed air substitutes boiler auxiliary steam and oil pipe is carried out
Purging.
As shown in figure 1, starting oil pump 8 before ignition of the boiler, the igniting MPa of oil pressure 3.5 is established, clicks on the program control boiler of oil gun
Start to light a fire, the related oily angle valve interlocking of boiler fuel feed pump 2 at each angle of boiler is opened, and is started to light a fire, is needed after pulverized coal preparation system startup
Big oil gun is withdrawn from, oil-piping need to be purged, and instrument replaces medium purging pipeline 6 with purging pipeline 7, and ignition of the boiler oil gun pipe is blown
Sweep, scene actually sees that purging effect is better.
Instrument is 0.7MPa with the pressure of purging pipeline 7, and the pressure of medium purging pipeline 6 is 1.3 MPa, because of auxiliary steam pressure
Power is high, and manually-operated gate is provided with steam off purging interface 11 during boiler startup, is specifically designed in instrument at pipeline 7 with purging
Instrument gas non-return valve 10, prevent boiler auxiliary steam door opens by mistake from steam is poured into instrument gas system, cause instrument steam contamination, make
Damaged into boiler relevant device.After boiler normal operation, the related manual valve of instrument purging pipeline 7 can be closed, opens and steams
Manually-operated gate is provided with vapour purging interface 11, recovers boiler auxiliary steam system, the purging effect of high-temperature steam for fuel oil
Fruit can be more preferable, but steam is between spinning period, and working medium has wasting phenomenon.
The utility model oil gun purging technology, there is provided a kind of innovative technical concept, by setting up compressed air purging
Pipeline, apply boiler fuel oil system Purge methods more flexible, safer, ensure that the safe and stable operation of fuel system.Just
Often compressed air system can be maintained to run always during operation, reduce the dosage of auxiliary steam, it is energy-saving to reach unit
Purpose.
As described above, although the utility model has been represented and described with reference to specific preferred embodiment, but it must not
It is construed to the limitation to the utility model itself.In the spirit and scope of the present utility model for not departing from appended claims and defining
Under the premise of, can various changes can be made in the form and details to it.
Claims (5)
1. a kind of back pressure thermal power plant unit is without activated vapor system, it is characterised in that：Including boiler fuel feed pump（2）, boiler oil return pipe
（3）, medium purging pipeline（6）, instrument with purging pipeline（7）, instrument gas non-return valve（10）, steam blowing interface（11）, compression it is empty
Gas interface（12）And instrument air compressor（13）；
Compressed air interface（12）Instrument air compressor is connected to by pipeline（13）Air inlet；Instrument air compressor
（13）Gas outlet pass through instrument with purging pipeline（7）It is connected to medium purging pipeline（6）；Instrument gas non-return valve（10）Installed in instrument
With purging pipeline（7）On；Steam blowing interface（11）It is connected to medium purging pipeline（6）Air inlet at, and in steam blowing
Interface（11）Place is provided with manually-operated gate；Medium purges pipeline（6）Gas outlet connection boiler oil return pipe（3）；Boiler oil return pipe（3）
Pass through check-valves（14）It is connected to boiler fuel feed pump（2）；In boiler fuel feed pump（2）On be serially connected with a check-valves（14）；Boiler
Fuel feed pump（2）For with boiler（1）It is connected.
2. back pressure thermal power plant unit according to claim 1 is without activated vapor system, it is characterised in that：In instrument purging pipeline
（7）On be at least additionally provided with a pipeline manually-operated gate.
3. back pressure thermal power plant unit according to claim 1 is without activated vapor system, it is characterised in that：In compressed air interface
（12）With instrument air compressor（13）Between pipeline at least provided with an air inlet manually-operated gate.
4. back pressure thermal power plant unit according to claim 1 is without activated vapor system, it is characterised in that：In boiler fuel feed pump
（2）On be additionally provided with fuel feeding manually-operated gate and fuel feeding angle valve（15）.
5. back pressure thermal power plant unit according to claim 1 is without activated vapor system, it is characterised in that：In boiler oil return pipe
（3）On be additionally provided with purging manually-operated gate and purging angle valve（21）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720294421.9U CN206695102U (en) | 2017-03-24 | 2017-03-24 | A kind of back pressure thermal power plant unit is without activated vapor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720294421.9U CN206695102U (en) | 2017-03-24 | 2017-03-24 | A kind of back pressure thermal power plant unit is without activated vapor system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206695102U true CN206695102U (en) | 2017-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720294421.9U Expired - Fee Related CN206695102U (en) | 2017-03-24 | 2017-03-24 | A kind of back pressure thermal power plant unit is without activated vapor system |
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| CN (1) | CN206695102U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123836A (en) * | 2019-12-30 | 2021-07-16 | 上海电气电站设备有限公司 | Back pressure steam turbine starting method |
-
2017
- 2017-03-24 CN CN201720294421.9U patent/CN206695102U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123836A (en) * | 2019-12-30 | 2021-07-16 | 上海电气电站设备有限公司 | Back pressure steam turbine starting method |
| CN113123836B (en) * | 2019-12-30 | 2022-07-19 | 上海电气电站设备有限公司 | Back pressure steam turbine starting method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171201 Termination date: 20190324 |