CN111237018A - Industrial steam residual pressure cascade utilization system applied to coal-fired steam supply unit in shutdown non-shutdown mode - Google Patents
Industrial steam residual pressure cascade utilization system applied to coal-fired steam supply unit in shutdown non-shutdown mode Download PDFInfo
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- CN111237018A CN111237018A CN202010244412.5A CN202010244412A CN111237018A CN 111237018 A CN111237018 A CN 111237018A CN 202010244412 A CN202010244412 A CN 202010244412A CN 111237018 A CN111237018 A CN 111237018A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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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
- F22D1/325—Schematic arrangements or control devices therefor
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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
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
- F22G5/123—Water injection apparatus
- F22G5/126—Water injection apparatus in combination with steam-pressure reducing valves
Abstract
The invention belongs to the energy-saving technical field in the field of heat supply reliability of a coal-fired industrial steam supply unit, and particularly relates to an industrial steam excess pressure cascade utilization system applied to a coal-fired steam supply unit in a shutdown non-shutdown mode, wherein a bypass combined heat supply system and a direct temperature and pressure reducing direct supply system are added on the basis of an original system; if heat supply steam backpressure turbo generator set trouble, changeable to direct desuperheating decompression direct supply system, the steam of boiler reheater export directly desuperheating decompression gets into the master pipe of whole factory industry steam supply, and the desuperheating water is got from the oxygen-eliminating device and is gone out water, and fail safe nature is high, and the guarantee system heat supply is stable.
Description
Technical Field
The invention relates to a cascade utilization system of an industrial steam residual pressure cascade utilization system applied to a coal-fired steam supply unit in a shutdown and non-stop mode, and belongs to the technical field of energy conservation in the field of heat supply reliability of the coal-fired industrial steam supply unit.
Background
With the continuous and deep promotion of the atmospheric pollution prevention and control work, the dispersed coal-fired boiler rooms with high pollution and high energy consumption are gradually shut down, the gas-using enterprises enter a newly-built industrial park near the coal-fired unit, and the coal-fired enterprises are clean and centralized in industrial gas supply, so that the total consumption control of regional coal-fired and fuel oil is facilitated. According to design specifications of large and medium-sized thermal power plants (GB 50660-2011), a cogeneration unit has two functions of power generation and heat supply in design, and has high heat supply reliability during external heat supply. For the heat supply type steam turbine, one machine is preferably provided with one furnace, when one steam boiler with the largest capacity is stopped, if the external steam supply capacity of the other boilers cannot meet the requirements of 100 percent of production steam consumption, 60 to 75 percent of winter heating, ventilation and domestic heat required by continuous production of thermal users, other standby heat sources are configured by a heat supply network. Different from the heating of residents in northern areas in winter, if the amount reduction, pressure reduction and even supply stop of industrial steam supply occur, the adverse effects of production reduction and production stop of steam-using enterprises and the like, which cause the production damage of the enterprises and the like, are caused, and from this viewpoint, the realization of the high safety and reliability of stable and continuous external steam supply of the large coal-fired generator set is particularly important.
For a heat supply power plant provided with a plurality of coal-fired power generating sets, a boiler heats water through raw coal combustion to generate high-temperature and high-pressure steam, the steam enters a steam turbine to generate electricity and supply heat industrially, if equipment such as the steam turbine or a generator breaks down and needs to be stopped for maintenance, the industrial steam supply system of the set is stopped, and the production reduction and production stop loss of steam-using enterprises are serious. In order to improve the reliability of the industrial steam supply system, the system has the emergency industrial steam supply capacity under extreme conditions, and the shutdown emergency industrial heat supply reconstruction of different furnaces of the bypass combined heat supply system can be implemented. In order to improve the through-flow capacity of the bypass combined heating system, the steam pressure entering and exiting the boiler reheater is generally controlled to be higher, and the steam is supplied to the outside after temperature and pressure reduction. In order to avoid the waste of steam excess pressure caused by the traditional mode that the heat supply steam of the bypass combined industrial heat supply system directly enters the steam supply main pipe through temperature reduction and pressure reduction, a steam turbine generator unit is needed to recycle the part of industrial steam excess pressure, and the power utilization system of the plant is waited.
Disclosure of Invention
The invention provides an industrial steam residual pressure gradient utilization system applied to a coal-fired steam supply unit in a non-stop mode, which can solve the problems pointed out in the background art.
The utility model provides an industrial steam excess pressure cascade utilization system for coal-fired steam supply unit does not shut down under the stove mode, includes boiler, high-pressure cylinder, intermediate pressure cylinder, low pressure cylinder, generator, main steam valve, the joint admission valve of intermediate pressure, high row check valve, a plurality of valve group, connecting line, moisturizing pump, condenser, condensate pump, oxygen-eliminating device electric feed water pump, high pressure heater boiler main steam goes out steam pipe department and increases high-pressure bypass pipe, high-pressure bypass pipe goes out the steam end and inserts in the reheater of boiler, be equipped with high-pressure bypass shut-off valve and high-pressure bypass temperature and pressure reduction valve group on the high-pressure bypass pipe, high-pressure bypass temperature and pressure reduction valve group provides the desuperheating water through first desuperheating water pipe, be equipped with valve group on the first desuperheating water pipe, the reheater steam pipe department of reheater increases first steam supply pipe, be equipped with valve group and industrial steam turbine generator unit on the first steam supply pipe, and the steam exhaust end of the industrial steam back pressure steam turbine generator unit is connected with an industrial steam supply main pipe.
Preferably, the first steam supply pipe is connected to the second steam supply pipe through a tee joint, a valve set is arranged on the second steam supply pipe, the valve set provides desuperheating water through a second desuperheating water pipe, the steam exhaust end of the second steam supply pipe is directly connected with an industrial steam supply main pipe, and the second desuperheating water pipe is provided with the valve set.
Preferably, the second temperature reduction water pipe is connected with an outlet of the deaerator, and the temperature reduction water is taken from water discharged from the deaerator.
Preferably, the first temperature-reducing water pipe is connected with an outlet of the high-pressure heater, and the temperature-reducing water is provided by the high-pressure heater.
The invention provides an industrial steam excess pressure cascade utilization system applied to a coal-fired steam supply unit in a shutdown and non-shutdown mode, when a steam turbine or a generator needs to be overhauled in a fault state, the steam turbine and the generator are shut down, main steam of a boiler enters a reheater side of the boiler after being subjected to temperature and pressure reduction through a high-pressure bypass temperature and pressure reduction valve group, then enters a heat supply steam backpressure generator unit to drive power generation after entering a reheater of the boiler to absorb heat, and a plant power system is connected, so that the heat economy of an emergency heat supply system is improved; if heat supply steam backpressure turbo generator set trouble, changeable to direct desuperheating decompression direct supply system, the steam of boiler reheater export directly desuperheating decompression gets into the master pipe of whole factory industry steam supply, and the desuperheating water is got from the oxygen-eliminating device and is gone out water, also can get from the oxygen-eliminating device that has just been worked on, and fail safe nature is high.
Drawings
Figure 1 is a schematic view of the system of the present invention,
description of reference numerals:
reference numbers in the figures: 1-a boiler; 2-high pressure cylinder; 3-a medium pressure cylinder; 4-low pressure cylinder; 5-a generator; 6-main steam valve; 7-medium pressure combined steam inlet valve; 8-high pressure bypass shutoff valve; 9-high pressure bypass temperature and pressure reducing valve group; 10-high-discharge check valve; 11-20-valve group; 21-a water replenishing pump; 22-a condenser; 23-a condensate pump 24-a deaerator; 25-an electric feed pump; 26-a high pressure heater; 27-industrial steam back pressure steam turbine generator unit; 28-main steam outlet pipe; 29-high pressure bypass line; 30-a first temperature-reducing water pipe; 31-reheater steam outlet pipe; 32-a first steam supply pipe; 33-a second steam supply pipe; 34-a second temperature reduction water pipe.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
Example 1:
as shown in fig. 1, an industrial steam excess pressure cascade utilization system applied to a coal-fired steam supply unit in a shutdown non-shutdown mode includes a boiler 1, a high-pressure cylinder 2, a medium-pressure cylinder 3, a low-pressure cylinder 4, a generator 5, a main steam valve 6, a medium-pressure combined steam inlet valve 7, a high-discharge check valve 10, a plurality of valve groups 12, 13, 14, 19, 20, a connecting pipeline, a water replenishing pump 21, a condenser 22, a condensate pump 23, a deaerator 24 electric water feeding pump 25, and a high-pressure heater 26, and the above structures are the existing structures, and a bypass combined heat supply system is added on the basis of the existing structures, and specifically includes: a high-pressure bypass pipe 29 is additionally arranged at a main steam outlet pipe 28 of the boiler 1, the high-pressure bypass pipe 29 is communicated with the main steam outlet pipe 28 in a tee joint mode and the like, the steam outlet end of the high-pressure bypass pipe 29 is connected into a reheater of the boiler 1 in a tee joint mode and the like, a high-pressure bypass shutoff valve 8 and a high-pressure bypass temperature and pressure reducing valve group 9 are arranged on the high-pressure bypass pipe 29, the high-pressure bypass temperature and pressure reducing valve group 9 provides temperature reducing water through a first temperature reducing water pipe 30, a valve group 11 is arranged on the first temperature reducing water pipe 30, the first temperature reducing water pipe 30 is connected with a high-pressure heater 26, and the temperature reducing water is provided through the high-pressure; reheater goes out steam pipe 31 department and increases first steam supply pipe 32, be equipped with valve group 15 and industrial steam back pressure turbo generator unit 27 on the first steam supply pipe 32, industrial steam back pressure turbo generator unit 27's steam exhaust end and the female union coupling of industry confession vapour to steam back pressure turbo generator unit 27 and industry confession are equipped with valve group 17 between the female pipe of vapour.
Example 2:
on the basis of the embodiment 1, a direct temperature and pressure reducing direct supply system is added, and specifically comprises the following steps: first steam supply pipe 32 passes through the tee bend form and inserts second steam supply pipe 33, and the access point that second steam supply pipe 33 is located the front side of valve group 15, the second supplies to be equipped with valve group 16 on the steam supply pipe 33, valve group 16 provides the desuperheating water through second desuperheating water pipe 34, second desuperheating water pipe 34 is connected with oxygen-eliminating device 24, and the desuperheating water is taken from oxygen-eliminating device 24 and is gone out water, also accessible machine play water, second steam supply pipe 33 steam exhaust end is direct to supply female union coupling of steam with the industry, be equipped with valve group 18 on the second desuperheating water pipe 34.
If heat supply steam backpressure turbo generator set 27 trouble in this system, changeable to direct supply system of reducing temperature and pressure, valve group 15/17 closes this moment, and valve group 16 opens, and the steam of boiler reheater 1 export supplies the main pipe of steam of the direct reduction in temperature and pressure entering whole factory industry of steam supply through second steam supply pipe 33, and valve group 18 opens, and the temperature reducing water is got from the oxygen-eliminating device and is gone out water, also can get from the machine oxygen-eliminating device that has just.
The working principle of the invention is as follows: in order to improve the reliability of the heating system, the coal-fired unit has the emergency industrial heating capacity under the condition of extreme conditions, such as the shutdown condition of a certain or all faults of a steam turbine or a generator, and can implement the shutdown emergency industrial heating transformation of different furnaces of the bypass combined heating system. At the moment, the bypass combined heat supply mode is put into operation, the main steam valve 6, the medium-pressure combined steam inlet valve 7, the high-exhaust check valve 10 and the four-section steam extraction to deaerator steam inlet pipeline valve 14 are all closed, the generator 6 stops operating, the steam turbine consisting of the high-pressure cylinder 2, the medium-pressure cylinder 3 and the low-pressure cylinder 4 stops operating or is in a rotating standby state, and the generator set vacuumizing system normally operates to prevent air from leaking. The boiler 1 keeps running above the minimum stable combustion load, the new steam at the outlet enters a high-pressure bypass pipe 29 through a high-pressure bypass shutoff valve 8 and a temperature and pressure reducing valve group 9 for reducing temperature and pressure, at the moment, a valve group 11 is opened, and the temperature reducing water is provided by a water supply system at the outlet of a high-pressure heater 26 or a main pipe for supplying water by a machine; the cold reheat steam is supplied to a deaerator 24 and a high-pressure heater 26 in part, and the rest of the cold reheat steam enters a reheater of the boiler 1 to absorb heat again so as to protect the wall temperature of the reheater of the boiler to be within a safe range; the valve set 15/17 is opened, outlet steam enters the heat supply steam back pressure steam turbine generator unit 27 through the first steam supply pipe 32 to do power generation, the unit service power system is waited, the heat supply steam back pressure steam turbine generator unit 27 exhaust steam enters the whole plant industrial steam supply main pipe, demineralized water enters the condenser 22 after being pressurized by the water replenishing pump 21 to maintain the steam-water balance of the unit, the demineralized water enters the deaerator 24, the electric water supply pump 25 and the high-pressure heater 26 after being pressurized by the condensate pump 23, in order to avoid potential safety hazards caused by cold water entering the boiler and oxygen in the water, the deaerator 24 and the high-pressure heater 26 heating steam source takes self-cooling re-steam and also can be taken from a machine-contacting auxiliary steam header, the high-pressure heater 26 drains water and flows back to the deaerator 24, and the valve.
If heat supply steam backpressure turbo generator set 27 trouble in this system, changeable to direct supply system of reducing temperature and pressure, valve group 15/17 closes this moment, and valve group 16 opens, and the steam of boiler reheater 1 export supplies the main pipe of steam of the direct reduction in temperature and pressure entering whole factory industry of steam supply through second steam supply pipe 33, and valve group 18 opens, and the temperature reducing water is got from the oxygen-eliminating device and is gone out water, also can get from the machine oxygen-eliminating device that has just.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (4)
1. The utility model provides a be applied to coal-fired steam supply unit and shut down industry steam residual pressure cascade under the mode of not blowing out, including boiler (1), high-pressure cylinder (2), intermediate pressure cylinder (3), low pressure cylinder (4), generator (5), steam main valve (6), the steam admission valve (7) are united to the intermediate pressure, check valve (10) are arranged to the height, a plurality of valve group (12, 13, 14, 19, 20), connecting line, moisturizing pump (21), condenser (22), condensate pump (23), oxygen-eliminating device (24) electric feed pump (25), high pressure feed water heater (26), its characterized in that: boiler (1) main steam goes out steam pipe (28) department and increases high pressure bypass pipe (29), high pressure bypass pipe (29) play steam end and inserts in the reheater of boiler (1), be equipped with high pressure bypass shutoff valve (8) and high pressure bypass temperature and pressure reduction valve group (9) on high pressure bypass pipe (29), high pressure bypass temperature and pressure reduction valve group (9) provide the temperature reduction water through first temperature reduction water pipe (30), be equipped with valve group (11) on first temperature reduction water pipe (30), the reheater of reheater goes out steam pipe (31) department and increases first steam supply pipe (32), be equipped with valve group (15) and industry steam turbine backpressure generating set (27) on first steam supply pipe (32), the steam extraction end and the female union coupling of industry steam supply of industry steam turbine generating set (27).
2. The system of claim 1, wherein the cascade utilization system comprises: first steam supply pipe (32) insert second steam supply pipe (33) through the tee bend form, be equipped with valve group (16) on second steam supply pipe (33), valve group (16) provide the desuperheating water through second desuperheating water pipe (34), second steam supply pipe (33) steam exhaust end is direct to be connected with industry steam supply mother's pipe, be equipped with valve group (18) on second desuperheating water pipe (34).
3. The system for utilizing the excess pressure of the industrial steam in the shutdown and non-stop mode of the coal-fired steam supply unit according to claim 2, characterized in that: the second temperature-reducing water pipe (34) is connected with an outlet of the deaerator (24), and the temperature-reducing water is taken from the water outlet of the deaerator (24).
4. The industrial steam residual pressure cascade utilization system applied to the shutdown and non-shutdown mode of the coal-fired steam supply unit as claimed in claims 1-3, characterized in that: the first temperature-reducing water pipe (30) is connected with the outlet of the high-pressure heater (26) and provides temperature-reducing water through the high-pressure heater (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010244412.5A CN111237018A (en) | 2020-03-31 | 2020-03-31 | Industrial steam residual pressure cascade utilization system applied to coal-fired steam supply unit in shutdown non-shutdown mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010244412.5A CN111237018A (en) | 2020-03-31 | 2020-03-31 | Industrial steam residual pressure cascade utilization system applied to coal-fired steam supply unit in shutdown non-shutdown mode |
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| CN111237018A true CN111237018A (en) | 2020-06-05 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112691A (en) * | 2020-10-16 | 2020-12-22 | 河北冀研能源科学技术研究院有限公司 | Asynchronous power generation system for cascade utilization of industrial steam of thermal power plant and adjusting method |
| CN112145246A (en) * | 2020-08-24 | 2020-12-29 | 中国神华能源股份有限公司国华电力分公司 | Unit external industry steam supply capacity increasing system and method and electronic equipment |
| CN112682828A (en) * | 2021-01-11 | 2021-04-20 | 北京京诚科林环保科技有限公司 | Coal gas power generation double-heat-source heat supply system and method |
| CN113431653A (en) * | 2021-07-23 | 2021-09-24 | 山东丰源生物质发电股份公司 | Industrial steam equipment with first-stage steam extraction and external supply for steam turbine |
| CN113587175A (en) * | 2021-06-08 | 2021-11-02 | 华能国际电力江苏能源开发有限公司南通电厂 | Heat supply system and heat supply method under unit deep peak regulation state |
| CN114198172A (en) * | 2021-11-12 | 2022-03-18 | 西安西热节能技术有限公司 | Additional high-pressure backpressure unit small-flow heat supply system and method |
| CN114459011A (en) * | 2021-12-31 | 2022-05-10 | 东方电气集团东方锅炉股份有限公司 | Steam-water system with safe heating surface for circulating fluidized bed boiler after power failure and operation method |
| CN114508397A (en) * | 2022-02-14 | 2022-05-17 | 西安西热节能技术有限公司 | System and method for utilizing high-parameter industrial extraction steam waste heat |
| CN114545815A (en) * | 2022-01-24 | 2022-05-27 | 北京大华启天工业技术有限公司 | Coal conveying system program control method and device, electronic equipment and storage medium |
| CN114922708A (en) * | 2022-05-13 | 2022-08-19 | 华电电力科学研究院有限公司 | Operation stopping method based on supercritical reheating type double-extraction heat supply backpressure unit system |
| CN114941552A (en) * | 2022-05-13 | 2022-08-26 | 华电电力科学研究院有限公司 | Shutdown non-shutdown heat supply rapid switching control method based on large supercritical reheating type double-extraction back pressure unit |
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- 2020-03-31 CN CN202010244412.5A patent/CN111237018A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145246B (en) * | 2020-08-24 | 2022-09-30 | 中国神华能源股份有限公司国华电力分公司 | Unit external industry steam supply capacity increasing system and method and electronic equipment |
| CN112145246A (en) * | 2020-08-24 | 2020-12-29 | 中国神华能源股份有限公司国华电力分公司 | Unit external industry steam supply capacity increasing system and method and electronic equipment |
| CN112112691A (en) * | 2020-10-16 | 2020-12-22 | 河北冀研能源科学技术研究院有限公司 | Asynchronous power generation system for cascade utilization of industrial steam of thermal power plant and adjusting method |
| CN112682828A (en) * | 2021-01-11 | 2021-04-20 | 北京京诚科林环保科技有限公司 | Coal gas power generation double-heat-source heat supply system and method |
| CN113587175B (en) * | 2021-06-08 | 2023-09-29 | 华能国际电力江苏能源开发有限公司南通电厂 | Heat supply system and heat supply method in deep peak regulation state of unit |
| CN113587175A (en) * | 2021-06-08 | 2021-11-02 | 华能国际电力江苏能源开发有限公司南通电厂 | Heat supply system and heat supply method under unit deep peak regulation state |
| CN113431653B (en) * | 2021-07-23 | 2022-11-04 | 山东丰源生物质发电股份公司 | Industrial steam equipment with first-stage steam extraction and external supply for steam turbine |
| CN113431653A (en) * | 2021-07-23 | 2021-09-24 | 山东丰源生物质发电股份公司 | Industrial steam equipment with first-stage steam extraction and external supply for steam turbine |
| CN114198172A (en) * | 2021-11-12 | 2022-03-18 | 西安西热节能技术有限公司 | Additional high-pressure backpressure unit small-flow heat supply system and method |
| CN114459011A (en) * | 2021-12-31 | 2022-05-10 | 东方电气集团东方锅炉股份有限公司 | Steam-water system with safe heating surface for circulating fluidized bed boiler after power failure and operation method |
| CN114545815A (en) * | 2022-01-24 | 2022-05-27 | 北京大华启天工业技术有限公司 | Coal conveying system program control method and device, electronic equipment and storage medium |
| CN114545815B (en) * | 2022-01-24 | 2023-11-14 | 北京大华启天工业技术有限公司 | Coal conveying system program control method and device, electronic equipment and storage medium |
| CN114508397A (en) * | 2022-02-14 | 2022-05-17 | 西安西热节能技术有限公司 | System and method for utilizing high-parameter industrial extraction steam waste heat |
| CN114508397B (en) * | 2022-02-14 | 2023-08-15 | 西安西热节能技术有限公司 | System and method for utilizing waste heat of high-parameter industrial extraction steam |
| CN114922708A (en) * | 2022-05-13 | 2022-08-19 | 华电电力科学研究院有限公司 | Operation stopping method based on supercritical reheating type double-extraction heat supply backpressure unit system |
| CN114941552A (en) * | 2022-05-13 | 2022-08-26 | 华电电力科学研究院有限公司 | Shutdown non-shutdown heat supply rapid switching control method based on large supercritical reheating type double-extraction back pressure unit |
| CN114922708B (en) * | 2022-05-13 | 2023-08-22 | 华电电力科学研究院有限公司 | Operation stopping method based on supercritical reheating type double-pumping heat supply back pressure unit system |
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