CN207975662U - A kind of boiler reheated steam soot blowing vapour source draws vapour device - Google Patents
A kind of boiler reheated steam soot blowing vapour source draws vapour device Download PDFInfo
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- CN207975662U CN207975662U CN201820204881.2U CN201820204881U CN207975662U CN 207975662 U CN207975662 U CN 207975662U CN 201820204881 U CN201820204881 U CN 201820204881U CN 207975662 U CN207975662 U CN 207975662U
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- soot blowing
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- reheated steam
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Abstract
The utility model discloses a kind of boiler reheated steam soot blowing vapour sources to draw vapour device, and leading-in end is arranged on the wall again pipeline between outlet header and middle reentrancy header；Reheated steam is drawn as soot blowing vapour source as a result of being exported again from wall, and well below the pressure difference for using main steam to generate, the operating condition of valve significantly improves, and the possibility of leakage is greatly reduced；Moreover, the possibility that each heating surface of boiler is purged and damaged for a long time by steam also greatly reduces, the operational reliability of equipment will greatly improve, in addition, using the reheated steam after steam turbine high-pressure cylinder did work(, the coal consumption of generating set is also reduced, has taken into account energy saving and safe operation double requirements.
Description
Technical field
The utility model is related to coal dust station boiler steam soot-blower fields more particularly to a kind of boiler reheating to steam
Vapour soot blowing vapour source draws vapour device.
Background technology
Coal dust station boiler steam soot blowing is to remove the one conventional operation measure of burner hearth and Boiler Heating Surfaces, is to ensure that unit
Safe and stable and economical operation necessary means, steam soot blowing is the steam that boiler is used for soot blowing, due to steam soot blowing effect
Good, coal adaptability is strong, is used widely in coal dust station boiler.
During steam soot blowing, boiler sootblowing steam impacts on fouling and slagging prior to high speed injection steam stream and generates impact force
It is set to fall off, thus the flow velocity of boiler sootblowing steam is higher, density is bigger, soot blowing effect is better；High pressure possessed by boiler sootblowing steam
Potential energy difference in (i.e. the pressure of originating point) and burner hearth between weak negative pressure forms the high-speed jet driving force of boiler sootblowing steam；When blowing
Grey steam enters after burner hearth, and pressure drastically declines, and self inflation can occur for steam and temperature reduces, when temperature is reduced to saturation
When below temperature, steam will condense into water droplet, and volume reduces rapidly 600 times, causes speed to slow down and loses soot blowing effect, is
Prevent steam liquefied from losing soot blowing effect, boiler sootblowing steam often also needs to the degree of superheat for having certain；In addition, what boiler generated
As long as steam is for generating electricity, and the steam after soot blowing can be discharged with flue gas, just lose generating function, reduce generating set
Economy；These various conditions all limit taking for boiler sootblowing steam vapour source point.
In the prior art, the soot blowing vapour source of certain southern Utilities Electric Co., Ltd.'s soot blower system be taken from Late reworking into
Mouth header steam, the boiler sootblowing steam pressure 17.9MPa under B-MCR operating modes, boiler sootblowing steam temperature is 460 DEG C, through main vapour soot blowing tune
After section door adjusts blowing pressure, blowing pressure 1.5MPa, boiler sootblowing steam temperature is 350 DEG C.
But since main vapour boiler sootblowing steam temperature and pressure are all excessively high, soot blowing pressure difference is 16.4MPa, the steam of high-quality
1.5MPa is dropped to from 17.9MPa decompressions, superheated steam quality is relatively high, and a large amount of high-quality steams are wasted, and reduces high-quality
Steam utilization reduces the economy of unit.And main steam pressure is up to 17Mpa, causes valve pressure high, the front and back pressure of valve
It is poor big, cause each valve of soot blower system to be susceptible to cavitation, wash away defect, valve wear is very fast, be easy to cause leakage, causes to blow
Grey pipeline is with pressure always, increases the possibility of gun barrel itself leakage and the leakage of boiler heating surface blow loss, there are larger peaces
Full hidden danger.
From the point of view of current soot blower system operating condition, soot blower system valve sealing face blow loss defect is more, maintenance workload
It is larger, generating set safety, economic performance are seriously affected, therefore, it is necessary to which the vapour that draws to boiler soot-blowing vapour source changes
Into.
Utility model content
In order to solve the above technical problems, a kind of boiler reheated steam soot blowing vapour source of the utility model offer draws vapour device, it can
Take into account energy saving and safe operation double requirements.
The technical solution of the utility model is as follows：A kind of boiler reheated steam soot blowing vapour source draws vapour device, and leading-in end is set
It sets on the wall again pipeline between outlet header and middle reentrancy header.
The boiler reheated steam soot blowing vapour source draws vapour device, wherein：It include the two-way outlet with wall outlet header again
Pipeline is connected and leads to the steam inducing tube road of Steam Soot-Blower System after three-way pipeline converges.
The boiler reheated steam soot blowing vapour source draws vapour device, wherein：The steam inducing tube road and wall outlet header again
The position that two-way outlet pipeline is connected is respectively positioned on before respective micro direct-contact desuperheater.
The boiler reheated steam soot blowing vapour source draws vapour device, wherein：In the two-way outlet pipe with wall outlet header again
U-shaped expansion compensation curved pipe is respectively arranged on the steam inducing tube road that road is connected.
The boiler reheated steam soot blowing vapour source draws vapour device, wherein：The steam inducing tube road, three-way pipeline and U-shaped swollen
Swollen compensation curved pipe is all made of the pipeline that material is 12Cr1MoV, latus rectum is 89 × 7mm of φ.
The boiler reheated steam soot blowing vapour source draws vapour device, wherein：The exit in the steam inducing tube road is in series with two
A manual isolating door.
The boiler reheated steam soot blowing vapour source draws vapour device, wherein：Two manual isolating doors are all made of model
The hand stop valve of J61Y-320_PN32_DN80.
A kind of boiler reheated steam soot blowing vapour source provided by the utility model draws vapour device, goes out again as a result of from wall
Mouth draws reheated steam as soot blowing vapour source, and well below the pressure difference for using main steam to generate, the operating condition of valve is shown
Writing improves, and the possibility of leakage is greatly reduced；Moreover, the possibility that each heating surface of boiler is purged and damaged for a long time by steam is also big
Big to reduce, the operational reliability of equipment will greatly improve, in addition, using the reheated steam after steam turbine high-pressure cylinder did work(,
The coal consumption for also reducing generating set has taken into account energy saving and safe operation double requirements.
Description of the drawings
Fig. 1 is the structure principle chart that the utility model boiler reheated steam soot blowing vapour source draws vapour device embodiment；
Figure label：Wall reentrancy header 101, wall type reheater 102, wall outlet header 103, middle reentrancy header again
104, steam inducing tube road 105, manual isolating door (106 and 107), micro direct-contact desuperheater 108, emergency spray attemperator 109.
Specific implementation mode
Below with reference to attached drawing, specific embodiment of the present utility model and embodiment are described in detail, it is described
Specific embodiment only to explain the utility model, be not intended to limit specific embodiment of the present utility model.
The utility model boiler reheated steam soot blowing vapour source draws soot blowing of the vapour device by former design using superheated steam air source
Mode uses the soot-blowing mode of all lower reheated steam air source of pressure and temperature instead, energy-saving to achieve the purpose that.
Through analysis, it is available that reheated steam shares air source at three, be respectively it is high export (i.e. reheated steam) again, wall reenters
Mouth and wall export again, and according to boiler producer to the parameter request of boiler sootblowing steam：Soot blower inlet temperature is at 300 DEG C or so, pressure
In 1~1.5Mpa or so, the degree of superheat requires to be more than 150 DEG C power.
If directly selecting the high reheated steam exported again, direct-contact desuperheater must be increased, because of the high reheating exported again
The temperature of steam is up to 540 DEG C, has exceeded the allowable temperature of carbon steel piping, therefore must reduce steam temperature while decompression
Degree, thus will cause system complex, performance driving economy poor.
If select wall reentrancy reheated steam, can and the degree of superheat relatively low because of vapor (steam) temperature it is smaller, it is possible to occur
Steam generates the defect washed away, worn to heating surface.
And the reheated steam that wall exports again, the steam pressure under B-MCR operating modes only have 3.72MPa, vapor (steam) temperature 382
DEG C, the degree of superheat of steam also meets the requirement more than 150 DEG C；And the range of steam pressure amplitude of variation is smaller, draws at runtime
The pressure for entering boiler sootblowing steam also can be more stable.
Therefore, by demonstration, the utility model boiler reheated steam soot blowing vapour source is drawn vapour device and is exported again again using wall
Hot steam.
Due to the use of reheated steam, B-MCR operating mode steam pressures only have 3.72MPa, before and after pressure reducing valve pressure difference less than
2.2MPa, well below the pressure difference for using main steam to generate, the operating condition of valve significantly improves, and the possibility of leakage is big
To reduce, valve reliability is improved, the possibility that each heating surface of boiler is purged and damaged for a long time by steam reduces, and the service life obtains
Extend, the operational reliability of equipment will greatly improve, and using the reheated steam after steam turbine high-pressure cylinder did work(, also drop
The low coal consumption of generating set, is of great significance to the safety and economic operation of generating set.
As shown in Figure 1, Fig. 1 is the structural principle that the utility model boiler reheated steam soot blowing vapour source draws vapour device embodiment
Figure, the reheated steam that high pressure cylinder steam discharge comes divide two-way to be inputted from wall reentrancy header 101 after emergency spray attemperator 109
Wall type reheater 102, and outlet header 103 divides two-way to export again from wall, and through in the entrance of respective micro direct-contact desuperheater 108
Reentrancy header 104；Reheated steam inputs medium temperature reheater by middle reentrancy header 104, and therefrom outlet header exports again, warp
High reentrancy header inputs high temperature reheater, and is exported from high outlet header again, continues to do work for Steam Turbine Through IP Admission.
The utility model boiler reheated steam soot blowing vapour source draw vapour device leading-in end setting wall again outlet header 103 with
On pipeline between middle reentrancy header 104, it is preferred that it includes going out with the two-way of wall outlet header 103 again that this, which draws vapour device,
Mouth pipeline is connected and leads to the steam inducing tube road 105 of Steam Soot-Blower System after three-way pipeline converges, and is drawn from two-way pipeline,
The thermal deviation of steam can be reduced.
Meanwhile to avoid the water entrained by steam drawn serious, it is preferred that the steam inducing tube road 105 and wall outlet header again
The position that 103 two-way outlet pipeline is connected is respectively positioned on before respective micro direct-contact desuperheater 108 that (i.e. reheated steam first flows
The position crossed).
It is preferred that being set respectively on the steam inducing tube road 105 being connected with the two-way outlet pipeline of wall outlet header 103 again
It is equipped with rational U-shaped expansion compensation curved pipe (not shown), for preventing steam inducing tube road 105 from causing thermal stretching because of temperature raising
The stress of generation and destroyed.
It is preferred that before the exit in the steam inducing tube road 105 enters Steam Soot-Blower System, there are two manually for series connection
Isolating door (106 and 107) can be reliably isolated for ensuring the equipment such as soot blower system soot blower when needing repair and maintenance
Vapour source improves safety assurance for repair and maintenance work.
The utility model boiler reheated steam soot blowing vapour source draws vapour device and uses low-quality steam soot blowing, reduces high-quality
The waste of steam, improves boiler economics, has achieved the purpose that energy-saving；It is reasonable in design, easy for installation, erector
Work amount and plant maintenance amount are few；It can put into for a long time, improve the reliability of boiler soot-blowing vapour source, ensure that boiler system equipment
Safe and reliable operation.
In the utility model boiler reheated steam soot blowing vapour source draws the specific implementation mode of vapour device, according to soot blower system
The flow of each position soot blower, boiler sootblowing steam consumption about 8000 ~ 1000kg/h, the reheated steam exported again using wall, which is used as, blows
When grey vapour source, steam pressure highest only has 3.72MPa, selects the pipeline of 89 × 7mm of φ, and select the valve of DN80, i.e.,
The requirement of boiler soot-blowing vapour can be met.
Specifically, the steam inducing tube road 105, three-way pipeline and U-shaped expansion compensation curved pipe are all made of material is
12Cr1MoV, the pipeline that latus rectum is 89 × 7mm of φ；Two manual isolating doors (106 and 107) are all made of model J61Y-320_
The hand stop valve of PN32_DN80.
The soot blowing of No. 1 of certain southern Utilities Electric Co.'s one phase boiler and No. 2 generating sets in the current superheated steam air source of use
Under mode, according to the flow of soot blower system each position soot blower, when accounting obtains current every unit soot blower and puts into operation total daily
It is long to take about 7 hours, consume about 50 ~ 70 tons of main steam；When in view of every 1% main steam flow extraction system, generating set is influenced
Economy about 1%, thus conversion, due to steam soot blowing, will cause every unit generation coal consumption to rise about under whole day operating mode
0.55~0.8g/(kW•h)。
And after the reheated steam for using low-temp low-pressure instead is as soot blowing vapour source, steam soot blowing can be made to generating set economy
It is down to 0.4 ~ 0.6g/ (kW h) under the influence of property, coal consumption for power generation about 0.15 ~ 0.2g/ (kW h) can be reduced after transformation；According to every
Run 5500h, 1,500,000,000 kW h of generated energy generating set year, annual every generating set can save 225 tons of standard coals；If according to mark
The 800 yuan/ton of calculating of coal unit price, every generating set can save 180,000 yuan of RMB, have good energy-saving effect every year, it is contemplated that
After the completion of two generating set transformations, annual total revenue is at 18 × 2=360,000 yuan or so.
In addition, said program, after implementation, the equipment deficiency rate of a phase boiler steam blowing ash system is greatly reduced, and avoids
Because boiler sootblowing steam hypertonia damages the hidden danger of boiler heating surface pipe；Meanwhile the steam consumption of boiler main steam is decreased,
Significant role is played at energy-saving aspect, the safety and economic operation and condenser to generating set are energy-saving all with important
Meaning.
It should be understood that the above is only the preferred embodiment of the utility model only, it is not sufficient to limit this reality
With novel technical solution, for those of ordinary skills, within the spirit and principles of the present invention, Ke Yigen
Increased and decreased according to above description, replaced, converted or is improved, and all these increases and decreases, replacement, transformation or improved technical side
Case should all belong to the protection domain of the appended claims for the utility model.
Claims (7)
1. a kind of boiler reheated steam soot blowing vapour source draws vapour device, which is characterized in that the leading-in end for drawing vapour device is arranged in wall
Again on the pipeline between outlet header and middle reentrancy header.
2. boiler reheated steam soot blowing vapour source according to claim 1 draws vapour device, it is characterised in that：Including going out again with wall
The two-way outlet pipeline of mouth header is connected and leads to the steam inducing tube road of Steam Soot-Blower System after three-way pipeline converges.
3. boiler reheated steam soot blowing vapour source according to claim 2 draws vapour device, it is characterised in that：The steam inducing tube road
The position being connected with the two-way outlet pipeline of wall outlet header again is respectively positioned on before respective micro direct-contact desuperheater.
4. boiler reheated steam soot blowing vapour source according to claim 2 draws vapour device, it is characterised in that：It is being exported again with wall
U-shaped expansion compensation curved pipe is respectively arranged on the steam inducing tube road that the two-way outlet pipeline of header is connected.
5. boiler reheated steam soot blowing vapour source according to claim 4 draws vapour device, it is characterised in that：The steam inducing tube
Road, three-way pipeline and U-shaped expansion compensation curved pipe are all made of the pipeline that material is 12Cr1MoV, latus rectum is 89 × 7mm of φ.
6. boiler reheated steam soot blowing vapour source according to claim 2 draws vapour device, it is characterised in that：The steam inducing tube road
Exit series connection there are two manual isolating door.
7. boiler reheated steam soot blowing vapour source according to claim 6 draws vapour device, it is characterised in that：Two isolation manually
Door is all made of the hand stop valve of model J61Y-320_PN32_DN80.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820204881.2U CN207975662U (en) | 2018-02-06 | 2018-02-06 | A kind of boiler reheated steam soot blowing vapour source draws vapour device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820204881.2U CN207975662U (en) | 2018-02-06 | 2018-02-06 | A kind of boiler reheated steam soot blowing vapour source draws vapour device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645581A (en) * | 2019-10-31 | 2020-01-03 | 大唐郓城发电有限公司 | Boiler soot blowing optimization control system and control method thereof |
| CN112815346A (en) * | 2021-02-02 | 2021-05-18 | 山东上奥电力科技有限公司 | Steam source energy-saving optimal control and fault online monitoring system and method for steam soot blower |
| CN113218093A (en) * | 2019-05-24 | 2021-08-06 | 浙江中控太阳能技术有限公司 | Double-high-temperature molten salt storage tank system of solar thermal power station and application thereof |
-
2018
- 2018-02-06 CN CN201820204881.2U patent/CN207975662U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218093A (en) * | 2019-05-24 | 2021-08-06 | 浙江中控太阳能技术有限公司 | Double-high-temperature molten salt storage tank system of solar thermal power station and application thereof |
| CN113218093B (en) * | 2019-05-24 | 2023-03-31 | 浙江可胜技术股份有限公司 | Double-high-temperature molten salt storage tank system of solar thermal power station and application thereof |
| CN110645581A (en) * | 2019-10-31 | 2020-01-03 | 大唐郓城发电有限公司 | Boiler soot blowing optimization control system and control method thereof |
| CN112815346A (en) * | 2021-02-02 | 2021-05-18 | 山东上奥电力科技有限公司 | Steam source energy-saving optimal control and fault online monitoring system and method for steam soot blower |
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