CN112524596A - Auxiliary heating system of steam extraction regenerative system of steam turbine and control method - Google Patents
Auxiliary heating system of steam extraction regenerative system of steam turbine and control method Download PDFInfo
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- CN112524596A CN112524596A CN202011297009.5A CN202011297009A CN112524596A CN 112524596 A CN112524596 A CN 112524596A CN 202011297009 A CN202011297009 A CN 202011297009A CN 112524596 A CN112524596 A CN 112524596A
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- steam supply
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- 238000000605 extraction Methods 0.000 title claims abstract description 84
- 238000010438 heat treatment Methods 0.000 title claims abstract description 58
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 4
- 238000012802 pre-warming Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000002209 hydrophobic effect Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
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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
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
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- 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
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/22—Drums; Headers; Accessories therefor
- F22B37/228—Headers for distributing feedwater into steam generator vessels; Accessories therefor
Abstract
The invention discloses an auxiliary heating system and a control method of a steam turbine steam extraction regenerative system, wherein the system comprises an auxiliary steam source, an auxiliary steam header and an auxiliary steam supply pipeline, the auxiliary steam source is connected with the auxiliary steam header, the first end of the auxiliary steam supply pipeline is connected with the auxiliary steam header, and the second end of the auxiliary steam supply pipeline is used for being connected to a high-pressure heater of the steam turbine steam extraction regenerative system. The invention adds an auxiliary heating system, an auxiliary steam source can be led from an auxiliary steam header of the unit to be supplied to the high-pressure heater, and water supply is heated in advance before the boiler is ignited in the starting stage of the unit so as to clean the boiler in a thermal state in advance, so that the starting speed of the unit is accelerated, the economic benefit of the unit is improved, and meanwhile, the boiler in the starting stage is more favorable for ignition and stable combustion of the boiler due to higher water supply temperature, and the safety of the unit is improved.
Description
Technical Field
The invention relates to the technical field of generator set equipment, in particular to an auxiliary heating system of a steam extraction regenerative system of a steam turbine and a control method.
Background
The energy-saving optimization work of the large thermal power generating unit is a common subject faced by modern power enterprises, and the start-stop energy-saving optimization of the unit is an important link of the energy-saving optimization work of the thermal power generating unit. The existing unit adopts a mode of heating by an adjacent machine to clean the boiler in a thermal state, but in the prior art, only under the condition that the other unit is operated, the heating system of the adjacent machine can be put into use, namely the system can not be used when the two units are all stopped to start one of the two units.
Disclosure of Invention
The invention discloses an auxiliary heating system of a steam extraction regenerative system of a steam turbine and a control method, aiming at solving the problem.
In order to solve the problems, the invention adopts the following technical scheme:
the utility model provides a steam turbine extracts steam and backheats auxiliary heating system of system, includes auxiliary steam source, supplementary steam header and supplementary steam supply pipeline, auxiliary steam source with supplementary steam header is connected, supplementary steam supply pipeline's first end with supplementary steam header is connected, supplementary steam supply pipeline's second end is used for being connected to steam turbine extracts steam and backheats system's high pressure heater.
And the auxiliary steam supply pipeline is provided with a steam supply stop valve, a steam supply regulating valve and a steam supply check valve.
The auxiliary steam source comprises one or more of starting boiler steam, four-section steam extraction, reheating steam and adjacent machine heating steam.
And the auxiliary steam supply pipeline is provided with a drainage device.
The second end of the auxiliary steam supply pipeline is connected with the high-pressure heater through a steam turbine steam extraction pipeline, the second end of the auxiliary steam supply pipeline is connected to the steam turbine steam extraction pipeline, and the steam turbine steam extraction pipeline is connected with the high-pressure heater.
Set up extraction check valve and extraction stop valve on the steam turbine extraction pipeline, supplementary steam supply pipeline's second end with the junction of steam turbine extraction pipeline is located extraction check valve with extraction stop valve with between the high pressure feed water heater.
The invention also provides a control method of the auxiliary heating system of the steam extraction regenerative system of the steam turbine, which comprises the following steps:
closing a steam extraction stop valve on a steam extraction pipeline of the steam turbine, opening a steam supply stop valve on an auxiliary steam supply pipeline, adjusting a steam supply adjusting valve on the auxiliary steam supply pipeline to a first preset opening degree, and pre-warming a high-pressure heater;
adjusting a steam supply adjusting valve on the auxiliary steam supply pipeline to a second preset opening degree, raising the temperature of outlet water of the high-pressure heater, and carrying out thermal cleaning on the boiler;
and adjusting a steam supply adjusting valve on the auxiliary steam supply pipeline to a third preset opening degree, reducing the outlet water temperature of the high-pressure heater, opening a steam extraction stop valve on the steam extraction pipeline of the steam turbine, and closing the steam supply stop valve on the auxiliary steam supply pipeline.
The rising change rate of the outlet water temperature of the high-pressure heater is less than 3 ℃/min.
The change rate of the reduction of the outlet water temperature of the high-pressure heater is less than 2 ℃/min.
The first preset opening degree is 5%.
The technical scheme adopted by the invention can achieve the following beneficial effects:
the auxiliary heating system and the control method of the steam extraction regenerative system of the steam turbine are adopted, the auxiliary heating system is added, an auxiliary steam source can be led from an auxiliary steam header of the unit and supplied to the high-pressure heater, water is heated in advance before the boiler is ignited in the starting stage of the unit so as to clean the thermal state of the boiler in advance, the starting speed of the unit is accelerated, the economic benefit of the unit is improved, and meanwhile, the higher water supply temperature is more beneficial to ignition and stable combustion of the boiler in the starting stage, and the safety of the unit is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a steam extraction regenerative system of a steam turbine according to the present invention;
fig. 2 is a schematic diagram of an auxiliary heating system of the steam turbine extraction regenerative system of the present invention.
Description of reference numerals:
10 auxiliary steam source
20 auxiliary steam header
30 auxiliary steam supply pipeline
31 steam supply stop valve
32 steam supply regulating valve
33 steam supply check valve
34 first end
35 second end
36 hydrophobic device
50 high-pressure heater
60 steam extraction pipeline of steam turbine
70 boiler
80 steam turbine
90 steam condenser
100 low pressure heater
110 oxygen remover
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1-2, the present invention provides an auxiliary heating system of a steam turbine extraction regenerative system, which includes an auxiliary steam source 10, an auxiliary steam header 20, and an auxiliary steam supply pipeline 30, wherein the auxiliary steam source 10 is connected to the auxiliary steam header 20, a first end 34 of the auxiliary steam supply pipeline 30 is connected to the auxiliary steam header 20, and a second end 35 of the auxiliary steam supply pipeline 30 is used for connecting to a high-pressure heater 50 of the steam turbine extraction regenerative system.
The auxiliary steam header 20 can be the auxiliary steam header 20 of the unit, the auxiliary steam header 20 and the public auxiliary steam supply pipeline 30 supply water to the high-pressure heater 50 to heat the water in advance before the boiler is ignited in the starting stage of the unit, so that the boiler is cleaned in a thermal state in advance, the starting speed of the unit is accelerated, the economic benefit of the unit is improved, meanwhile, the higher water supply temperature is more beneficial to ignition and stable combustion of the boiler in the starting stage, and the safety of the unit is improved. In the starting stage of the unit, the feed water with higher temperature passes through the boiler 70, so that the temperature of the hearth can be ensured to be at a higher level, and the ignition and stable combustion of the boiler 70 are facilitated. After the boiler 70 is ignited, the higher water supply temperature is beneficial to the early investment of the denitration system, and the environmental protection index of the unit at the starting stage is improved.
The auxiliary steam header 20 of the unit is stable in steam source parameters and not influenced by adjacent units, and meanwhile, the influence on the parameters such as load, axial displacement, expansion difference, vibration, water supply temperature and the like of the normally operated adjacent units due to heating of the adjacent units can be avoided, and the possible adverse influence on the safety and economic operability of the adjacent units can be avoided.
The auxiliary steam header 20 of the unit is closer to the high-pressure heater 50, the system structure is simpler due to the arrangement, and the pipeline is shortened much compared with the heating system of an adjacent machine.
The auxiliary steam source 10 of the present invention includes one or more of start-up boiler steam, four-stage extraction steam, reheat steam, and adjacent machine heating steam, and preferably, a plurality of the start-up boiler steam, the four-stage extraction steam, the reheat steam, and the adjacent machine heating steam are selected as the auxiliary steam source 10, so that the auxiliary steam source 10 is more reliable, thereby ensuring the reliability of the auxiliary heating system.
The auxiliary steam supply pipeline 30 is provided with a steam supply stop valve 31, a steam supply regulating valve 32 and a steam supply check valve 33. Preferably, a steam supply stop valve 31, a steam supply regulating valve 32 and a steam supply check valve 33 are arranged in order from the auxiliary steam header 20 to the high pressure heater 50 on the auxiliary steam supply pipe 30.
The steam supply shutoff valve 31 may control opening and closing of the auxiliary steam supply duct 30. The steam supply regulating valve 32 may control the steam supply flow of the auxiliary steam supply pipe 30. The steam supply check valve 33 can control the flow direction of the steam in the auxiliary steam supply pipeline 30 to avoid backflow, and the steam in the steam extraction pipeline 60 of the steam turbine can enter the auxiliary steam supply pipeline 30. The steam supply stop valve 31, the steam supply regulating valve 32 and the steam supply check valve 33 are preferably electrically operated valves, which facilitate control of the auxiliary heating system.
Set up hydrophobic means 36 on supplementary steam supply pipe way 30, hydrophobic means 36 can carry out hydrophobic at auxiliary heating system outage in-process, avoids the comdenstion water to get into high pressure feed water heater 50's steam inlet or steam turbine extraction pipeline 60, and hydrophobic means 36 is arranged in deriving the inside ponding that produces when cooling down in the supplementary steam supply pipe way 30, and in a preferred scheme, hydrophobic means 36 includes: the piston comprises a piston head and a piston rod sleeved with a compression spring, and the top end face of the piston head is provided with a lug extending upwards; the outer sleeve is formed by connecting two sections of holes with different diameters in series, and a step is formed at the joint of the two sections of holes; the piston is positioned in a hole with a larger diameter in the outer sleeve, and at least one drainage groove for guiding flow is arranged on the inner wall of the top of the outer sleeve, which corresponds to the piston head; the bottom end of the compression spring is abutted against the step, the piston rod is lifted away from the step by the elastic force of the compression spring, water flows out from the bottom of the outer sleeve, and the compression piston moves downwards when the internal pressure of the steam turbine is increased and seals the outer sleeve at the step by the piston rod. Preferably, the bottom of the piston rod is further connected with a guide rod, the guide rod is arranged in a hole with a smaller diameter in the outer sleeve in a penetrating mode, and a transverse through water drainage hole is formed in the inner wall of the hole with the smaller diameter in the outer sleeve. The top end of the piston head is provided with four lugs which are arranged into a ring shape, each lug is in a fan shape, and a gap between every two adjacent lugs is opposite to the drainage groove.
According to the invention, the second end 35 of the auxiliary steam supply pipeline 30 is connected with the high-pressure heater 50 through the steam turbine extraction pipeline 60, the second end 35 of the auxiliary steam supply pipeline 30 is connected to the steam turbine extraction pipeline 60, and the steam turbine extraction pipeline 60 is connected with the high-pressure heater 50, so that a new steam inlet is prevented from being added to the high-pressure heater 50.
The steam turbine extraction pipe 60 is provided with an extraction check valve and an extraction stop valve, and the joint of the second end 35 of the auxiliary steam supply pipe 30 and the steam turbine extraction pipe 60 is located between the extraction check valve and the extraction stop valve and the high-pressure heater 50. The junction of the second end 35 of the auxiliary steam supply line 30 and the steam turbine extraction line 60 is located downstream of the extraction check valve and the extraction check valve, and the auxiliary heating system can be started after the extraction check valve is closed, so that the influence of the auxiliary heating system on the steam turbine extraction line 60 is avoided.
The auxiliary steam supply check valve 33 can prevent steam in the steam turbine extraction pipeline 60 from entering the auxiliary heating system to affect the auxiliary heating system, and the steam extraction check valve can prevent steam in the auxiliary heating system from entering the steam turbine extraction pipeline 60 to affect the steam turbine.
The invention also provides a control method of the auxiliary heating system of the steam extraction regenerative system of the steam turbine, which comprises the following steps: the extraction stop valve on the steam turbine extraction conduit 60 is closed, the steam supply stop valve 31 on the auxiliary steam supply conduit 30 is opened, and the steam supply regulating valve 32 on the auxiliary steam supply conduit 30 is regulated to a first preset opening degree, which may be, for example, 5%. Pre-warming the high pressure heater 50; adjusting a steam supply adjusting valve 32 on the auxiliary steam supply pipeline 30 to a second preset opening degree, wherein the second preset opening degree can be 80% -100%, for example, the outlet water temperature of the high-pressure heater 50 rises, the rising change rate of the outlet water temperature of the high-pressure heater 50 is less than 3 ℃/min, and performing thermal cleaning on the boiler 70; and adjusting the steam supply adjusting valve 32 on the auxiliary steam supply pipeline 30 to a third preset opening degree, wherein the third preset opening degree can be 5% -25%, for example, the outlet water temperature of the high-pressure heater 50 is reduced, the reduction change rate of the outlet water temperature of the high-pressure heater 50 is less than 2 ℃/min, opening the steam extraction stop valve on the steam turbine steam extraction pipeline 60, and closing the steam supply stop valve 31 on the auxiliary steam supply pipeline 30.
In the invention, an auxiliary heating system is added to the high-pressure heater 50, and a heating steam source provided by the auxiliary heating system can be led from the auxiliary steam header 20 of the unit to be supplied to the high-pressure heater 50, so that the boiler 70 is heated in advance before ignition in the starting stage of the unit to achieve the purpose of cleaning the boiler 70 in a hot state in advance. The heating steam comes out from the auxiliary steam header 20 through the auxiliary steam supply pipeline 30 and sequentially passes through the steam supply stop valve 31, the steam supply adjusting valve 32 and the steam supply check valve 33, enters the high-pressure heater 50 through the steam turbine steam extraction pipeline 60, the auxiliary steam supply pipeline 30 is provided with the corresponding water drainage device 36, and water drainage is performed in the operation stop process of the auxiliary heating system. The valve opening is adjusted by an electric steam supply adjusting valve 32, the steam inlet amount is adjusted, and the water supply temperature is controlled.
The auxiliary heating system is put into operation, firstly, in a cold state flushing stage, the steam extraction stop valve of the steam extraction pipeline 60 of the steam turbine is checked and confirmed to be closed, the pipeline of the auxiliary heating system can be warmed firstly, and after the warming is finished, the opening degree of the steam supply regulating valve 32 of the auxiliary heating system is opened to 5 percent, so that the high-pressure heater 50 is pre-warmed. After the pre-warming of the high-pressure heater 50 is finished, adjusting a steam supply regulating valve 32 of the auxiliary heating system to control the steam inlet amount of the high-pressure heater 50, slowly raising the temperature until the change rate of the temperature of the water supplied by the high-pressure heater 50 is not more than 3 ℃/min, and continuing to keep the auxiliary heating system running and keeping the higher temperature of the water supplied after the thermal cleaning of the boiler 70 is finished.
And stopping the auxiliary heating system, increasing the load and correspondingly increasing the pressure after the unit is connected to the grid, gradually withdrawing the auxiliary heating system according to the steam extraction pipeline parameters, controlling the high heating and cooling speed to be not more than 2 ℃/min, slowly opening a steam extraction stop valve of a steam extraction pipeline 60 of the steam turbine, switching the steam source of the high-pressure heater 50, and stopping the auxiliary heating system after the steam source is switched.
Auxiliary heating systems may be provided in the high pressure heaters 50, 50 and 50 of the present invention, and the auxiliary heating systems of the high pressure heaters 50 may share the auxiliary steam header 20 of the unit, or the auxiliary heating systems of the high pressure heaters 50 may be provided with the auxiliary steam header 20, respectively.
By adopting the control method of the auxiliary heating system of the steam extraction regenerative system of the steam turbine, the auxiliary heating system is added, the auxiliary steam source 10 can be led from the auxiliary steam header 20 of the unit and supplied to the high-pressure heater 50, and the feed water is heated before the boiler 70 is ignited in the starting stage of the unit so as to clean the boiler 70 in a thermal state in advance and accelerate the starting speed of the unit, thereby improving the economic benefit of the unit, and simultaneously, the higher feed water temperature is more beneficial to the ignition and stable combustion of the boiler 70 in the starting stage, and the safety of the unit is improved.
In the invention, a steam extraction pipeline 60 of a steam turbine is respectively connected with the steam turbine 80, a high-pressure heater 50 and a low-pressure heater 100, the high-pressure heater 50 and the low-pressure heater 100 can be surface heaters, the inside of the heater pipe is provided with condensed water or feed water with lower temperature, the outside of the heater pipe is provided with high-temperature steam of a certain stage of the steam turbine, the steam meets water condensed by condensation and enters a deaerator 110 and a condenser 90, the deaerator 110 is a mixed heater, the inside of the deaerator 110 is not provided with a heat exchange pipeline, the steam is directly mixed with the condensed water and the drain water and then enters a feed water pump, through the heat exchange process, the heat energy of the steam partially doing work in the steam turbine is transferred to the condensed water or the feed water, a working medium is subjected to pressure boosting of the feed water pump and heating of a boiler 70 and then enters the steam turbine again to do, the circulating heat efficiency of the unit is improved, and the economic benefit is increased.
In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a steam turbine extracts steam and backheats auxiliary heating system of system which characterized in that, includes auxiliary steam source (10), auxiliary steam header (20) and supplementary steam supply pipeline (30), auxiliary steam source (10) with auxiliary steam header (20) are connected, supplementary first end (34) that supply steam pipeline (30) with auxiliary steam header (20) are connected, supplementary second end (35) that supply steam pipeline (30) are used for being connected to steam turbine extracts steam and backheats high pressure heater (50) of system.
2. The auxiliary heating system of the steam turbine extraction recuperation system according to claim 1, characterized in that the auxiliary steam supply duct (30) is provided with a steam supply stop valve (31), a steam supply regulating valve (32) and a steam supply check valve (33).
3. The auxiliary heating system of the steam turbine extraction recuperator system of claim 1, wherein said auxiliary steam source (10) comprises one or more of start-up boiler steam, four-stage extraction steam, reheat steam, and adjacent machine heat steam.
4. The auxiliary heating system for steam turbine extraction recuperator system in accordance with claim 1, wherein said auxiliary steam supply conduit (30) is provided with a water trap (36).
5. The auxiliary heating system of the steam turbine extraction recuperator system of claim 1, wherein the second end (35) of the auxiliary steam supply duct (30) is connected to the high-pressure heater (50) through a steam turbine extraction duct (60), the second end (35) of the auxiliary steam supply duct (30) is connected to the steam turbine extraction duct (60), and the steam turbine extraction duct (60) is connected to the high-pressure heater (50).
6. The auxiliary heating system of the steam turbine extraction regenerative system according to claim 5, wherein an extraction check valve (62) and an extraction check valve (61) are disposed on the steam turbine extraction duct (60), and the connection between the second end (35) of the auxiliary steam supply duct (30) and the steam turbine extraction duct (60) is located between the extraction check valve (62), the extraction check valve (61) and the high-pressure heater (50).
7. A method of controlling an auxiliary heating system for a turbine extraction recuperator system as claimed in any one of claims 1-6, including:
closing an extraction stop valve (61) on a steam extraction pipeline (60) of the steam turbine, opening a steam supply stop valve (31) on an auxiliary steam supply pipeline (30), adjusting a steam supply adjusting valve (32) on the auxiliary steam supply pipeline (30) to a first preset opening degree, and pre-warming a high-pressure heater (50);
adjusting a steam supply adjusting valve (32) on the auxiliary steam supply pipeline (30) to a second preset opening degree, increasing the temperature of outlet water of the high-pressure heater (50), and carrying out thermal cleaning on the boiler (70);
and adjusting a steam supply adjusting valve (32) on the auxiliary steam supply pipeline (30) to a third preset opening degree, reducing the outlet water temperature of the high-pressure heater (50), opening a steam extraction stop valve (61) on a steam turbine steam extraction pipeline (60), and closing a steam supply stop valve (31) on the auxiliary steam supply pipeline (30).
8. The method for controlling the auxiliary heating system of the steam turbine extraction regenerative system according to claim 7, characterized in that the change rate of the temperature rise of the outlet water of the high-pressure heater (50) is less than 3 ℃/min.
9. The control method of the auxiliary heating system of the steam turbine extraction regenerative system according to claim 7, characterized in that the change rate of the reduction of the leaving water temperature of the high-pressure heater (50) is less than 2 ℃/min.
10. The method for controlling an auxiliary heating system of a turbine extraction recuperator system as claimed in claim 7, wherein said first predetermined opening degree is 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011297009.5A CN112524596A (en) | 2020-11-18 | 2020-11-18 | Auxiliary heating system of steam extraction regenerative system of steam turbine and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011297009.5A CN112524596A (en) | 2020-11-18 | 2020-11-18 | Auxiliary heating system of steam extraction regenerative system of steam turbine and control method |
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| CN112524596A true CN112524596A (en) | 2021-03-19 |
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| CN202011297009.5A Pending CN112524596A (en) | 2020-11-18 | 2020-11-18 | Auxiliary heating system of steam extraction regenerative system of steam turbine and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484413A (en) * | 2022-01-14 | 2022-05-13 | 西安热工研究院有限公司 | System and method for heating water |
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| CN106016230A (en) * | 2016-06-28 | 2016-10-12 | 西安热工研究院有限公司 | Once-through boiler starting system and method |
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| CN109539223A (en) * | 2018-11-27 | 2019-03-29 | 国投北部湾发电有限公司 | A kind of 320MW fired power generating unit is started without the cold start method of boiler |
| CN111322607A (en) * | 2020-03-16 | 2020-06-23 | 陕西宝鸡第二发电有限责任公司 | Control system and control method for early starting of high-pressure heater |
-
2020
- 2020-11-18 CN CN202011297009.5A patent/CN112524596A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016230A (en) * | 2016-06-28 | 2016-10-12 | 西安热工研究院有限公司 | Once-through boiler starting system and method |
| CN106246245A (en) * | 2016-08-29 | 2016-12-21 | 华能国际电力开发公司铜川照金电厂 | A kind of method shortening unit starting time and energy conservation starting |
| CN109539223A (en) * | 2018-11-27 | 2019-03-29 | 国投北部湾发电有限公司 | A kind of 320MW fired power generating unit is started without the cold start method of boiler |
| CN111322607A (en) * | 2020-03-16 | 2020-06-23 | 陕西宝鸡第二发电有限责任公司 | Control system and control method for early starting of high-pressure heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114484413A (en) * | 2022-01-14 | 2022-05-13 | 西安热工研究院有限公司 | System and method for heating water |
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