CN206320728U - Attemperation water system of boiler superheater - Google Patents
Attemperation water system of boiler superheater Download PDFInfo
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- CN206320728U CN206320728U CN201621355643.9U CN201621355643U CN206320728U CN 206320728 U CN206320728 U CN 206320728U CN 201621355643 U CN201621355643 U CN 201621355643U CN 206320728 U CN206320728 U CN 206320728U
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- water
- desuperheating water
- superheater
- economizer
- desuperheating
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Abstract
The utility model is related to a kind of Attemperation water system of boiler superheater, including high-pressure heater, economizer and superheater, connecting pipe is communicated between high-pressure heater and the water inlet of economizer, desuperheating water main pipeline is communicated between the delivery port and superheater of economizer, desuperheating water subsidiary conduit is communicated between desuperheating water main pipeline and connecting pipe.For the desuperheating water that economizer delivery port is drawn, due to from high-pressure heater being directly entered superheater by the desuperheating water of desuperheating water subsidiary conduit, therefore bigger from the desuperheat differential water pressures for crossing the extraction of desuperheating water subsidiary conduit, the temperature difference is also bigger, makes to better control over steam temperature.When boiler burning inferior coal, at grid-connected initial stage and during cutting cylinder, increase the desuperheating water for entering superheater from desuperheating water subsidiary conduit, greatly improve desuperheating water of superheater pressure difference, desuperheating water input amount during increasing igniting and being grid-connected, avoid superheater over temperature, it is ensured that the operation safety of superheater and unit.
Description
Technical field
The utility model is related to boiler superheater falling temperature technique field, more particularly to a kind of boiler superheater desuperheat water system
System.
Background technology
Boiler superheater desuperheating water is used for being lowered into the vapor (steam) temperature of high temperature superheater, protects high temperature superheater, simultaneously
The vapor (steam) temperature for entering steam turbine is adjusted, maintains main steam temperature certain, it is ensured that unit safety.Current boiler factory's design
Desuperheating water of superheater system in order to improve generatine set heat efficiency and extension attemperator service life, by desuperheating water of superheater leading point
Quoted from economizer exit pipeline, but there is problems with the program：For the W type flame boilers of lambskin, work as boiler
Desuperheating water of superheater is drawn from economizer exit, desuperheating water pitch standard-sized sheet smaller in initial start stage desuperheating water and superheater pressure difference
When attemperation water flow it is still relatively low.When burning coal volatile matter is relatively low, due to poor, combustion lag of catching fire, superheater easily surpasses
Temperature；Especially at grid-connected initial stage and cut burning during cylinder and need to strengthen, and now steam flow is low, before and after desuperheating water of superheater
Pressure difference is small, attemperation water flow is too small, superheater wall temperature easily overtemperature, it is impossible to ensure Safety of Superheater.
Utility model content
The purpose of this utility model is to provide a kind of Attemperation water system of boiler superheater, it is possible to increase desuperheating water of superheater
Pressure difference and flow, it is to avoid superheater over temperature, it is ensured that the safety of superheater.
To realize the purpose of this utility model, adopt the technical scheme that：
A kind of Attemperation water system of boiler superheater, including high-pressure heater, economizer and superheater, high-pressure heater and province
Connecting pipe is communicated between the water inlet of coal device, desuperheating water main pipeline is communicated between the delivery port and superheater of economizer,
Desuperheating water subsidiary conduit is communicated between desuperheating water main pipeline and connecting pipe.
For the desuperheating water that economizer delivery port is drawn, because the desuperheating water by desuperheating water subsidiary conduit is from height
Pressure heater is directly entered superheater, therefore bigger from the desuperheat differential water pressures for crossing the extraction of desuperheating water subsidiary conduit, and the temperature difference is also bigger,
Make to better control over steam temperature.When boiler burning inferior coal, at grid-connected initial stage and during cutting cylinder, increase is from desuperheating water auxiliary tube
Road enters the desuperheating water of superheater, greatly improves desuperheating water of superheater pressure difference, and the desuperheating water during increase is lighted a fire and be grid-connected is thrown
Enter amount, it is to avoid superheater over temperature, it is ensured that the operation safety of superheater and unit.
Technical scheme is further illustrated below：
It is further that desuperheating water main pipeline is provided with check-valves and the first connection position connected with desuperheating water subsidiary conduit
Put, check-valves is located between the first link position and the delivery port of economizer.Prevented by check-valves from desuperheating water subsidiary conduit
Aqueous reflux out enters economizer, it is ensured that the operation safety of unit.
It is further that desuperheating water main pipeline is provided with the first control valve, the first control valve is located at check-valves and saves coal
Between the delivery port of device.After boiler burning inferior coal and load are raised, then the first control valve is opened, superheater is from economizer
Delivery port introduce desuperheating water.
It is further that the first control valve is electric gate valve.Make the control of the first control valve more intelligent.
It is further that desuperheating water subsidiary conduit is provided with the second control valve.When boiler burning inferior coal, grid-connected
Initial stage and during cutting cylinder, the second control valve is opened, makes the water come out from high-pressure heater defeated by desuperheating water subsidiary conduit
Deliver to superheater；When unit closes the second control valve under other running statuses, then.
It is further that the second control valve is electric gate valve.Make the control of the second control valve more intelligent.
It is further that connecting pipe is provided with water-supplying operation platform and the second connection position connected with desuperheating water subsidiary conduit
Put, the second link position is located between water-supplying operation platform and high-pressure heater.Make the desuperheating water introduced from desuperheating water subsidiary conduit
Pressure difference is bigger.
Further that flow nozzle is additionally provided with connecting pipe, flow nozzle be located at water-supplying operation platform and
Between the water inlet of economizer.
Compared with prior art, the utility model has the advantages that：
The utility model is for the desuperheating water that economizer delivery port is drawn, due to by desuperheating water subsidiary conduit
Desuperheating water is directly entered superheater from high-pressure heater, therefore bigger from the desuperheat differential water pressures for crossing the extraction of desuperheating water subsidiary conduit,
The temperature difference is also bigger, makes to better control over steam temperature.When boiler burning inferior coal, at grid-connected initial stage and during cutting cylinder, increase from
Desuperheating water subsidiary conduit enters the desuperheating water of superheater, greatly improves desuperheating water of superheater pressure difference, simultaneously increase igniting and network process
In desuperheating water input amount, it is to avoid superheater over temperature, it is ensured that superheater and unit operation safety.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment Attemperation water system of boiler superheater.
Description of reference numerals：
10. high-pressure heater, 20. economizers, 210. water inlets, 220. delivery ports, 30. superheaters, 310. one-level desuperheats
Device, 320. 2 grades of attemperators, 40. connecting pipes, 410. water-supplying operation platforms, 411. first feedwater pipings, 412. second feed pipes
Road, 413. the 3rd control valves, 414. pneumatic control valves, 415. the 4th control valves, 416. the 5th control valves, 420. flows
Measure nozzle, 430. second link positions, 50. desuperheating water main pipelines, 510. check-valves, 520. first link positions, 530. the
One control valve, 60. desuperheating water subsidiary conduits, 610. second control valves.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of Attemperation water system of boiler superheater, including high-pressure heater 10, economizer 20 and superheater
30, connecting pipe 40, the delivery port 220 of economizer 20 are communicated between high-pressure heater 10 and the water inlet 210 of economizer 20
Desuperheating water main pipeline 50 is communicated between superheater 30, desuperheating water is communicated between desuperheating water main pipeline 50 and connecting pipe 40
Subsidiary conduit 60.
For the desuperheating water that the delivery port 220 of economizer 20 is drawn, due to subtracting by desuperheating water subsidiary conduit 60
Warm water is directly entered superheater 30 from high-pressure heater 10, therefore from the desuperheat differential water pressures that desuperheating water subsidiary conduit 60 is drawn excessively more
Greatly, the temperature difference is also bigger, makes to better control over steam temperature.When boiler burning inferior coal, at grid-connected initial stage and during cutting cylinder, increase
Enter the desuperheating water of superheater 30 from desuperheating water subsidiary conduit 60, greatly improve the desuperheat differential water pressures of superheater 30, increase igniting and
Desuperheating water input amount during grid-connected, it is to avoid the overtemperature of superheater 30, it is ensured that the operation safety of superheater 30 and unit.
In the present embodiment, superheater 30 includes one-level attemperator 310 and two grades of attemperators 320, with the overcritical W of 600MW
Exemplified by type boiler, under 180MW load conditions, the outlet of high-pressure heater 10 power pressure is about 11.5MPa, the water outlet of economizer 20
220 pressure of mouth are about 9.7MPa, and one-level attemperator 310 and two grades of desuperheat water inlet power pressures of attemperator 320 are in 9.2-
Between 9.3MPa, the desuperheating water of 20 delivery port of economizer 220 and one-level attemperator 310 and two grades of desuperheat water inlet works of attemperator 320
Matter pressure difference is in 0.4-0.5MPa or so, and desuperheating water subsidiary conduit 60 and one-level attemperator 310 and two grades of desuperheating waters of attemperator 320
Entrance working medium pressure difference, in 2.2-2.3MPa or so, is that the desuperheating water of 20 delivery port of economizer 220 subtracts with one-level attemperator 310 and two grades
More than 5 times of the warm desuperheat water inlet working medium pressure difference of device 320, this is beneficial to ensure have enough desuperheat current during 30 overtemperature of superheater
Amount；And high-pressure heater 10 exports Temperature of Working between 210-220 DEG C, the operating temperature of 20 delivery port of economizer 220 is in 280-
Between 290 DEG C, the desuperheating water that desuperheating water subsidiary conduit 60 is drawn subtracts on an equal basis than low 70 DEG C or so of the desuperheating water that economizer 20 is drawn
Warm water amount, it will help preferably control steam temperature.When boiler burning inferior coal, startup stage is (especially with inferior smokeless
Coal), the overtemperatute of superheater 30 is more protruded, in addition, (being more than 10%) when moisture is higher, during debugging or after operation
Pulverized coal preparation system is run in the case of abnormal (such as chute blockage), and the overtemperature situation possible duration is long, utilizes the high pressure for aiding in desuperheating water
Poor and low water temperature, it will help ensure heating surface safety in start process, be applicable while being also beneficial to boiler as-fired coal matter
Property.
As shown in figure 1, desuperheating water main pipeline 50 is provided with check-valves 510 and connected with desuperheating water subsidiary conduit 60 first
Link position 520, check-valves 510 is located between the first link position 520 and the delivery port 220 of economizer 20, passes through check-valves
510 prevent from entering economizer 20 from the aqueous reflux that desuperheating water subsidiary conduit 60 comes out, it is ensured that the operation safety of unit.
As shown in figure 1, desuperheating water main pipeline 50 is provided with the first control valve 530, the first control valve 530 is located at check-valves
Between 510 and the delivery port 220 of economizer 20, desuperheating water subsidiary conduit 60 is provided with the second control valve 610.When boiler is used
During colm, at grid-connected initial stage and during cutting cylinder, close the first control valve 530, open the second control valve 610, make from
The water that high-pressure heater 10 comes out is delivered to superheater 30 by desuperheating water subsidiary conduit 60；When boiler load (being more than 35%) rises
Gao Hou, then open the first control valve 530, closes the second control valve 610, delivery port 220 of the superheater 30 from economizer 20
The desuperheating water of introducing.
In the present embodiment, the first control valve 530 and the second control valve 610 are electric gate valve, make the first control
The control of the control valve 610 of valve 530 and second is more intelligent.First control valve 530 and the second control valve 610 can be with roots
Other kinds of control valve is set to according to being actually needed.
As shown in figure 1, connecting pipe 40 is aided in provided with water-supplying operation platform 410, flow nozzle 420 and with desuperheating water
The second link position 430 that pipeline 60 is connected, flow nozzle 420 is located at the water inlet of water-supplying operation platform 410 and economizer 20
Between mouth 210, the second link position 430 is located between water-supplying operation platform 410 and high-pressure heater 10, makes from desuperheating water auxiliary tube
The desuperheat differential water pressures that road 60 is introduced are bigger.Second link position 430 can also be arranged on connecting pipe 40 according to actual needs
Other positions.
In the present embodiment, water-supplying operation platform 410 includes being arranged in parallel in the first feedwater piping 411 on connecting pipe 40
With the second feedwater piping 412, the first feedwater piping 411 is controlled provided with the 3rd control valve 413, pneumatic control valve the 414, the 4th
Valve 415, the second feedwater piping is provided with the 5th control valve 416, controls to enter economizer 20 by water-supplying operation platform 410
Medium.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and it describes more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (8)
1. a kind of Attemperation water system of boiler superheater, it is characterised in that described including high-pressure heater, economizer and superheater
Connecting pipe, the delivery port of the economizer and the overheat are communicated between the water inlet of high-pressure heater and the economizer
Desuperheating water main pipeline is communicated between device, desuperheating water auxiliary tube is communicated between the desuperheating water main pipeline and the connecting pipe
Road.
2. Attemperation water system of boiler superheater according to claim 1, it is characterised in that the desuperheating water main pipeline is provided with
Check-valves and the first link position connected with the desuperheating water subsidiary conduit, the check-valves are located at first connection position
Put between the delivery port of the economizer.
3. Attemperation water system of boiler superheater according to claim 2, it is characterised in that the desuperheating water main pipeline is provided with
First control valve, first control valve is located between the check-valves and the delivery port of the economizer.
4. Attemperation water system of boiler superheater according to claim 3, it is characterised in that first control valve is electricity
Dynamic gate valve.
5. Attemperation water system of boiler superheater according to claim 1, it is characterised in that on the desuperheating water subsidiary conduit
Provided with the second control valve.
6. Attemperation water system of boiler superheater according to claim 5, it is characterised in that second control valve is electricity
Dynamic gate valve.
7. the Attemperation water system of boiler superheater according to any one of claim 1 to 6, it is characterised in that the connecting tube
Road is provided with water-supplying operation platform and the second link position connected with the desuperheating water subsidiary conduit, the second connection position set
Between the water-supplying operation platform and the high-pressure heater.
8. Attemperation water system of boiler superheater according to claim 7, it is characterised in that be additionally provided with the connecting pipe
Flow nozzle, the flow nozzle is located between the water-supplying operation platform and the water inlet of the economizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621355643.9U CN206320728U (en) | 2016-12-09 | 2016-12-09 | Attemperation water system of boiler superheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621355643.9U CN206320728U (en) | 2016-12-09 | 2016-12-09 | Attemperation water system of boiler superheater |
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| Publication Number | Publication Date |
|---|---|
| CN206320728U true CN206320728U (en) | 2017-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621355643.9U Active CN206320728U (en) | 2016-12-09 | 2016-12-09 | Attemperation water system of boiler superheater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620947A (en) * | 2017-08-28 | 2018-01-23 | 浙江海洋大学 | A kind of desuperheating water of superheater water system |
| CN109945159A (en) * | 2019-02-27 | 2019-06-28 | 哈尔滨锅炉厂有限责任公司 | A kind of super critical boiler or ultra-supercritical boiler Attemperation water system and its application method |
| CN112303613A (en) * | 2020-10-30 | 2021-02-02 | 西安热工研究院有限公司 | Two-stage superheater desuperheating water system capable of independently fetching water |
| CN112377891A (en) * | 2020-11-10 | 2021-02-19 | 西安热工研究院有限公司 | Energy-conserving power plant boiler over heater temperature reduction water system of degree of depth |
-
2016
- 2016-12-09 CN CN201621355643.9U patent/CN206320728U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620947A (en) * | 2017-08-28 | 2018-01-23 | 浙江海洋大学 | A kind of desuperheating water of superheater water system |
| CN107620947B (en) * | 2017-08-28 | 2019-05-21 | 浙江海洋大学 | A kind of desuperheating water of superheater water system |
| CN109945159A (en) * | 2019-02-27 | 2019-06-28 | 哈尔滨锅炉厂有限责任公司 | A kind of super critical boiler or ultra-supercritical boiler Attemperation water system and its application method |
| CN112303613A (en) * | 2020-10-30 | 2021-02-02 | 西安热工研究院有限公司 | Two-stage superheater desuperheating water system capable of independently fetching water |
| CN112377891A (en) * | 2020-11-10 | 2021-02-19 | 西安热工研究院有限公司 | Energy-conserving power plant boiler over heater temperature reduction water system of degree of depth |
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