CN105953208A - Boiler starting and separating bypass steam utilization device and method - Google Patents
Boiler starting and separating bypass steam utilization device and method Download PDFInfo
- Publication number
- CN105953208A CN105953208A CN201610471633.XA CN201610471633A CN105953208A CN 105953208 A CN105953208 A CN 105953208A CN 201610471633 A CN201610471633 A CN 201610471633A CN 105953208 A CN105953208 A CN 105953208A
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- Prior art keywords
- steam
- low
- boiler
- pipeline
- oxygen
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
-
- 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
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
Abstract
The invention discloses a boiler starting and separating bypass steam utilization device and method. The boiler starting and separating bypass steam utilization device is characterized in that steam separators (13) are provided with two lines, a first regulating valve (23), an auxiliary steam pipeline (8) and a deaerator (7) are sequentially arranged behind the steam separators (13) according to one line, and a second bypass steam heating high-pressure pipeline (26), a second regulating valve (28), a second high-pressure low-load drain pipeline (27) and the deaerator (7) are arranged behind the steam separators (13) according to the other line; the shortcomings that because the extremely-hot starting condition hardly occurs, the equipment capacity is excessively large if bypass valves are selected according to the extremely-hot working condition, the equipment investment and the pipeline investment are extremely high and equipment leaves unused and is wasted in the prior art are overcome. The boiler starting and separating bypass steam utilization device and method have the advantages that water is heated to 180 DEG C through steam produced by a boiler, the fuel consumption for starting the boiler can be reduced, steam of adjacent units is prevented from being consumed, and the generating capacity of the adjacent units is improved.
Description
Technical field
The present invention relates to thermal power plant concurrent boiler start-up separation system, be more specifically a kind of boiler startup
Separate reject steam and utilize device and method.
Background technology
In the unit starting stage, there is boiler duty and steam turbine throttle flow be unmatched asks in existing supercritical unit
Topic, is respectively provided with high pressure bypass valve and low voltage bypass valve on main steam line and high-temperature reheat pipe road, makes overheated steaming
Steam unnecessary in vapour system and reheating steam system respectively enters the reheater of boiler after bypass valve pressure and temperature reducing and coagulates
Vapour device.
The Starting mode of unit is divided into cold start (shutdown was more than 72 hours), warm starting according to the length of downtime
(shutting down 10-72 hour), hot starting, hot start (shutting down less than 10 hours), very hot startup (shutting down less than 1 hour), steam turbine enters vapour
Pressure during red switch and to enter vapour be certain, but owing to boiler is under different Starting mode, the heat of accumulation differs, and reaches phase
Under same pressure, steam production also differs, and therefore during four kinds of Starting mode of coupling, the selection differential of shunt location is the biggest.
As a example by a certain typical 350MW supercritical unit, when configuration starts bypass, in order to meet different Starting mode machine
The needs of stove coupling, according to machine stove combined launch curve, the hp and lp bypass valve capacity calculated is as follows:
As can be seen from the above table, under very hot startup operating mode, required bypass valve flow is relatively big, as by cold conditions, temperature state,
Hot starting, hot start considers, high pressure turbine by valve capacity presses 40%BMCR flow, and 70%BMCR flow pressed by low voltage bypass valve.As
Needing to meet very hot startup, high pressure turbine by valve capacity needs to increase to 45%BMCR capacity, and low voltage bypass valve needs to increase to
82%BMCR flow.
After unit regulation terminates to enter comercial operation, very hot startup operating mode seldom occurs, as by very hot state work
Condition selectes bypass valve, and place capacity can be made excessive, causes equipment and pipeline investment high, causes idle waste for equipment.Therefore,
It is necessary system is improved.
Summary of the invention
The first object of the present invention is to overcome the weak point of above-mentioned background technology, and proposes a kind of boiler startup and separate
Reject steam utilizes device.
One boiler startup separation reject steam of the present invention utilizes device, and it includes turbine low pressure cylinder, condenser, condensation
Water pump, low-pressure heater, oxygen-eliminating device, steam feed pump, high-pressure heater, economizer, steam-water separator, ceiling, Bao Qiang, low temperature
Superheater, pendant superheater, high temperature superheater, steam turbine high-pressure cylinder, low-temperature reheater, high temperature reheater, intermediate pressure cylinder 2 are gone here and there successively
Connection, it is characterised in that: on described steam-water separator, rear is disposed with two lines, and a road is to divide described soda pop
The first regulation valve, auxiliary steam pipeline and oxygen-eliminating device it is provided with from device rear；Another road is rear at described steam-water separator
Side be provided with reject steam heat No. 2 high add pipeline, the second regulation valve, No. 2 high add underload hydrophobic pipeline and oxygen-eliminating device.
In technique scheme: when the steam production of boiler and steam turbine throttle flow are not mated, it is included in high temperature mistake
Hot device rear be provided with high pressure bypass valve, low-temperature reheat pipe road, high temperature reheater, low-temperature reheater, low voltage bypass valve and
Condenser.
In technique scheme: one end of two steam-water separators is provided with water storage tank；One end of oxygen-eliminating device is arranged
There is auxiliary steam pipeline.
The second object of the present invention is to overcome the weak point of above-mentioned background technology, and proposes a kind of boiler startup and separate
Reject steam Application way.
One boiler startup separation reject steam Application way of the present invention, it is characterised in that: it includes following flow process:
1., at the unit starting initial stage, from the steam of turbine low pressure cylinder discharge after condenser condenses, then through condensing water
Flowing through low-pressure heater after pump boosting and arrive oxygen-eliminating device again, the feedwater in oxygen-eliminating device flows through high pressure after steam feed pump pressurizes and adds
Hot device arrives the economizer of boiler again, feeds water and enter steam-water separator carry out steam-water separation through economizer, water-cooling wall in boiler,
2., the steam separated in steam-water separator enters ceiling, Bao Qiang, low temperature through steam-water separator steam pipework
Superheater and pendant superheater, enter turbine high-pressure through main steam line after finally becoming superheated steam in high temperature superheater
Cylinder；
3., the steam discharge of described steam turbine high-pressure cylinder is after low-temperature reheat pipe road, high temperature reheater, low-temperature reheater
Enter back into the intermediate pressure cylinder of steam turbine.
In technique scheme: at the unit starting initial stage, when the steam production of boiler and steam turbine throttle flow are not mated,
The excess steam that high temperature superheater produces enters low-temperature reheat pipe road through high pressure bypass valve, and steam flows to high temperature reheater
The unnecessary reheated steam produced enters back in condenser through low-temperature reheater, low voltage bypass valve.
In technique scheme: the water that steam-water separator is separated enters water storage tank；Oxygen-eliminating device add vapours come
From auxiliary steam pipeline.
In technique scheme: draw two road steam, wherein a road steam at described steam-water separator steam pipework
Heat oxygen-eliminating device pipeline via reject steam, after the first regulation valve decompression, enter air vent pipework road, reheat to enter into and remove
In oxygen device；Another road steam enters into reject steam after the second regulation valve decompression and heats No. 2 and high add pipeline, high is added by No. 2
Underload hydrophobic pipeline enters oxygen-eliminating device.
The present invention includes following technological merit: 1, under very hot startup, draws the saturated of 18.5t/h from starting separator
Steam goes to heat the condensation water in oxygen-eliminating device, and the saturated vapor of about 30t/h goes to heat the feedwater of No. 2 Gao Jianei, can will feed water
Temperature utilizes boiler self to steam and is heated to 180 DEG C, reduces the boiler startup time.
2, the superheated steam of boiler export reduces, and the high pressure turbine by valve capacity selected by this is reduced to 35%BMCR by 45%
Capacity, low voltage bypass valve capacity is reduced to 60%BMCR capacity by 82%BMCR capacity, reduces the capacity of bypass valve, reduces
Equipment initial outlay；Although increasing a few road regulation valve pipeline, but pipeline running temperature being the highest, pipeline and valve use low-alloy steel
Material, the pipeline of increase and valve are far below the bypass valve equipment investment reduced.
3, utilize boiler self to steam feedwater and be heated to 180 DEG C, compare the auxiliary vapour of employing or steam heating will be to as the occasion requires
Water is heated to 180 DEG C, it is possible to reduce the fuel oil consumption of starting trouble, does not consume steam as the occasion requires, adds the generating of adjacent unit
Amount.
4, this system is especially for double reheat power generation sets, relatively low due to duty ratio at the unit starting initial stage, double reheat temperature
Degree temperature rise ratio is relatively slow, after using this system, owing to main steam, hot arc, a secondary hot arc quantity of steam reduce, and corresponding secondary
Hot arc caloric receptivity can increase, and can accelerate double reheat power generation sets secondary hot arc temperature rise speed, be substantially reduced the startup time of unit.
Accompanying drawing explanation
Fig. 1 is the connected modes such as existing boiler steam-water separator, bypass valve, steam turbine, oxygen-eliminating device.
Fig. 2 is the connected mode of the steam-water separator after improving, bypass valve, steam turbine, oxygen-eliminating device etc..
In figure: low pressure (LP) cylinder 1, intermediate pressure cylinder 2, high pressure cylinder 3, condenser 4, condensate pump 5, low-pressure heater 6, oxygen-eliminating device 7, auxiliary
Help steam-heating pipe road 8, steam feed pump 9, high-pressure heater 10, economizer 11, water-cooling wall 12, steam-water separator 13, water storage
Case 14, steam-water separator steam pipework 15, roof enclosure wall low temperature superheater 16, pendant superheater 17, high temperature superheater 18, high temperature
Reheater 19, low-temperature reheater 20, high pressure bypass valve 21, low voltage bypass valve 22, first regulate valve 23, reject steam heating deoxygenation
Device pipeline 24, low-temperature reheat pipe road 25, reject steam heat No. 2 high-pressure heater pipelines 26,2, and high to add underload hydrophobic
Pipeline 27, first regulates valve 28.
Detailed description of the invention
Describe in detail below in conjunction with the accompanying drawings the present invention performance, but they are not intended that limitation of the invention,
The most for example, be will become clearer from easy to understand by explanation advantages of the present invention simultaneously.
With reference to shown in Fig. 1-2: one boiler startup separation reject steam of the present invention utilizes device, and it includes that steam turbine is low
Cylinder pressure 1, condenser 4, condensate pump 5, low-pressure heater 6, oxygen-eliminating device 7, steam feed pump 9, high-pressure heater 10, economizer
11, steam-water separator 13, ceiling, Bao Qiang, low temperature superheater 16, pendant superheater 17, high temperature superheater 18, steam turbine high-pressure cylinder
3, high temperature reheater 20, low-temperature reheater 19, intermediate pressure cylinder 2 are sequentially connected in series, it is characterised in that: on described steam-water separator 13
Being provided with two lines, a road is that described steam-water separator 13 rear is provided with the first regulation valve 23, auxiliary steam pipeline 8
With oxygen-eliminating device 7；Another road be described steam-water separator 13 be provided with in the wings reject steam heat No. 2 high add pipeline 26,
Rear is provided with regulation, and valve 23,2 is high adds underload hydrophobic pipeline 27 and oxygen-eliminating device 7.
When the steam production of boiler and steam turbine throttle flow are not mated, high temperature superheater 18 be provided with high pressure bypass valve 21,
In low-temperature reheat pipe road 25, high temperature reheater 20, low-temperature reheater 19, low voltage bypass valve 22, condenser 4；Steam-water separation
The water that device 13 is separated enters water storage tank 14；Oxygen-eliminating device 7 add vapours from auxiliary steam pipeline 8.
Present invention additionally comprises a kind of boiler startup separation reject steam Application way, it is characterised in that: it includes as dirty
Journey:
1., at the unit starting initial stage, from the steam of turbine low pressure cylinder 1 discharge after condenser 4 condenses, then through condensing
Flowing through low-pressure heater 6 after water pump 5 boosting and arrive oxygen-eliminating device 7 again, the feedwater in oxygen-eliminating device 7 flows through after steam feed pump 9 pressurizes
High-pressure heater 10 arrives the economizer 11 of boiler again, feeds water and enter steam-water separation through economizer 11, water-cooling wall 12 in boiler
Device 13 carries out steam-water separation,
2., the steam separated in steam-water separator 13 through steam-water separator steam pipework 15 enter ceiling, Bao Qiang,
Low temperature superheater 16 and pendant superheater 17, enter through main steam line after finally becoming superheated steam in high temperature superheater 18
Steam turbine high-pressure cylinder 3；
The steam discharge of 3., described steam turbine high-pressure cylinder 3 is through low-temperature reheat pipe road 25, low-temperature reheater 20, high temperature again
The intermediate pressure cylinder 2 of steam turbine is entered back into after hot device 19.
At the unit starting initial stage, when the steam production of boiler and steam turbine throttle flow are not mated, high temperature superheater 18 produces
Excess steam enter low-temperature reheat pipe road 25 through high pressure bypass valve 21, steam flow to high temperature reheater 20 produce
Unnecessary reheated steam enters back in condenser 4 through low-temperature reheater 19, low voltage bypass valve 22.
The water that steam-water separator 13 is separated enters water storage tank 14；Oxygen-eliminating device 7 add vapours from air vent pipework
Road 8.
Drawing two road steam at described steam-water separator steam pipework 13, wherein a road steam heats via reject steam
Oxygen-eliminating device pipeline 24, enters air vent pipework road 8 after the first regulation valve 23 decompression, reheats and enter in oxygen-eliminating device 7；Another
Road steam enters into reject steam after the second regulation valve 28 decompression and heats No. 2 and high add pipeline 26, is dredged by No. 2 high underloads that add
Water lines 27 enters oxygen-eliminating device 7.
Above-mentioned unspecified part is prior art.
Claims (7)
1. boiler startup separation reject steam utilizes a device, and it includes turbine low pressure cylinder (1), condenser (4), condenses water
Pump (5), low-pressure heater (6), oxygen-eliminating device (7), steam feed pump (9), high-pressure heater (10), economizer (11), soda pop are divided
From device (13), ceiling, Bao Qiang, low temperature superheater (16), pendant superheater (17), high temperature superheater (18), steam turbine high-pressure cylinder
(3), low-temperature reheater (20), high temperature reheater (19), intermediate pressure cylinder (2) are sequentially connected in series, it is characterised in that: divide described soda pop
Being provided with two lines on device (13), a road is to be disposed with the first regulation valve at described steam-water separator (13) rear
(23), auxiliary steam pipeline (8) and oxygen-eliminating device (7)；Another road is to be provided with side in the wings at described steam-water separator (13)
Road steam heat No. two high add pipeline (26), the second regulation valve (28), No. two high add underload hydrophobic pipeline (27) and oxygen-eliminating device
(7)。
A kind of boiler startup separation reject steam the most according to claim 1 utilizes device, it is characterised in that: when boiler
When steam production and steam turbine throttle flow are not mated, it be included in high temperature superheater (18) rear be provided with high pressure bypass valve (21),
Low-temperature reheat pipe road (25), high temperature reheater (20), low-temperature reheater (19), low voltage bypass valve (22) and condenser (4).
A kind of boiler startup separation reject steam the most according to claim 1 and 2 utilizes device, it is characterised in that: two
One end of individual steam-water separator (13) is provided with water storage tank (14)；One end of oxygen-eliminating device (7) is provided with auxiliary steam pipeline (8).
4. a boiler startup separation reject steam Application way, it is characterised in that: it includes following flow process:
1., at the unit starting initial stage, the steam discharged from turbine low pressure cylinder (1) is after condenser (4) condenses, then through condensing
Flowing through low-pressure heater (6) after water pump (5) boosting and arrive oxygen-eliminating device (7) again, the feedwater in oxygen-eliminating device (7) is through steam feed pump (9)
Flow through high-pressure heater (10) after pressurization and arrive the economizer (11) of boiler again, feed water in boiler through economizer (11), water-cooled
Wall (12) enters steam-water separator (13) and carries out steam-water separation,
2., the steam separated in steam-water separator (13) through steam-water separator steam pipework (15) enter ceiling, Bao Qiang,
Low temperature superheater (16) and pendant superheater (17), finally high temperature superheater (18) is inner become superheated steam after through main steam pipe
Road enters steam turbine high-pressure cylinder (3)；
The steam discharge of 3., described steam turbine high-pressure cylinder (3) is through low-temperature reheat pipe road (25), low-temperature reheater (20), high temperature
The intermediate pressure cylinder (2) of steam turbine is entered back into after reheater (19).
A kind of boiler startup separation reject steam Application way the most according to claim 4, it is characterised in that:
At the unit starting initial stage, when the steam production of boiler and steam turbine throttle flow are not mated, high temperature superheater (18) produces
Excess steam enters low-temperature reheat pipe road (25) through high pressure bypass valve (21), and steam flows to low-temperature reheater (20) and produces
Unnecessary reheated steam enter back in condenser (4) through high temperature reheater (19), low voltage bypass valve (22).
A kind of boiler startup separation reject steam the most according to claim 4 utilizes system, it is characterised in that: steam-water separation
The water that device (13) is separated enters water storage tank (14)；Oxygen-eliminating device (7) add vapours from auxiliary steam pipeline (8).
A kind of boiler startup separation reject steam Application way the most according to claim 4, it is characterised in that: described
Steam-water separator steam pipework (13) draws two road steam, and wherein a road steam heats oxygen-eliminating device pipeline via reject steam
(24), after the first regulation valve (23) decompression, enter air vent pipework road (8), reheat and enter in oxygen-eliminating device (7)；Another road
Steam enters into reject steam after the second regulation valve (28) decompression and heats No. 2 and high add pipeline (26), high adds underload by No. 2
Hydrophobic pipeline (27) enters oxygen-eliminating device (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610471633.XA CN105953208B (en) | 2016-06-23 | 2016-06-23 | A kind of boiler startup separation reject steam utilizes device and method |
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|---|---|---|---|
| CN201610471633.XA CN105953208B (en) | 2016-06-23 | 2016-06-23 | A kind of boiler startup separation reject steam utilizes device and method |
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| CN105953208A true CN105953208A (en) | 2016-09-21 |
| CN105953208B CN105953208B (en) | 2019-01-01 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166355A (en) * | 2017-07-07 | 2017-09-15 | 宁波健益检测科技有限公司 | A kind of moist steam self-heating water scavenging system |
| CN108087863A (en) * | 2018-02-08 | 2018-05-29 | 西安西热节能技术有限公司 | A kind of neighbour's machine condensation water interacted system |
| CN110553247A (en) * | 2019-10-09 | 2019-12-10 | 宁波正源电力有限公司 | Power station energy storage and heat supply peak-valley adjusting system and method |
| CN112303611A (en) * | 2020-10-30 | 2021-02-02 | 西安热工研究院有限公司 | Direct current furnace high energy water recovery system |
| CN114198738A (en) * | 2021-12-14 | 2022-03-18 | 华能山东石岛湾核电有限公司 | High-temperature gas cooled reactor feed water heating system |
| CN114321874A (en) * | 2022-01-05 | 2022-04-12 | 国家能源集团国源电力有限公司 | Boiler starting system |
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| FR2118693A5 (en) * | 1970-12-17 | 1972-07-28 | Westinghouse Electric Corp | |
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| CN202188480U (en) * | 2010-11-22 | 2012-04-11 | 章礼道 | Direct-current furnace startup system with media voltage expansion separator |
| CN103953915A (en) * | 2014-05-19 | 2014-07-30 | 章礼道 | Method for recycling startup drained water working medium and heat of secondary reheating boiler through high-pressure heaters |
| CN205782812U (en) * | 2016-06-23 | 2016-12-07 | 中国电力工程顾问集团中南电力设计院有限公司 | A kind of boiler startup separation reject steam utilizes device |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2118693A5 (en) * | 1970-12-17 | 1972-07-28 | Westinghouse Electric Corp | |
| CN202188480U (en) * | 2010-11-22 | 2012-04-11 | 章礼道 | Direct-current furnace startup system with media voltage expansion separator |
| CN202188482U (en) * | 2011-06-02 | 2012-04-11 | 章礼道 | Pumpless direct-current furnace startup system capable of fully recycling working media and heat |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166355A (en) * | 2017-07-07 | 2017-09-15 | 宁波健益检测科技有限公司 | A kind of moist steam self-heating water scavenging system |
| CN108087863A (en) * | 2018-02-08 | 2018-05-29 | 西安西热节能技术有限公司 | A kind of neighbour's machine condensation water interacted system |
| CN110553247A (en) * | 2019-10-09 | 2019-12-10 | 宁波正源电力有限公司 | Power station energy storage and heat supply peak-valley adjusting system and method |
| CN112303611A (en) * | 2020-10-30 | 2021-02-02 | 西安热工研究院有限公司 | Direct current furnace high energy water recovery system |
| CN114198738A (en) * | 2021-12-14 | 2022-03-18 | 华能山东石岛湾核电有限公司 | High-temperature gas cooled reactor feed water heating system |
| CN114198738B (en) * | 2021-12-14 | 2024-02-02 | 华能山东石岛湾核电有限公司 | Water supply heating system of high-temperature gas cooled reactor |
| CN114321874A (en) * | 2022-01-05 | 2022-04-12 | 国家能源集团国源电力有限公司 | Boiler starting system |
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