CN117028970A - Flow adjustment method and system for superheater - Google Patents
Flow adjustment method and system for superheater Download PDFInfo
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- CN117028970A CN117028970A CN202311049039.8A CN202311049039A CN117028970A CN 117028970 A CN117028970 A CN 117028970A CN 202311049039 A CN202311049039 A CN 202311049039A CN 117028970 A CN117028970 A CN 117028970A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 128
- 230000001105 regulatory effect Effects 0.000 claims abstract description 35
- 230000033228 biological regulation Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 12
- 230000001276 controlling effect Effects 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 26
- 230000007423 decrease Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/02—Applications of combustion-control devices, e.g. tangential-firing burners, tilting burners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/20—Controlling superheat temperature by combined controlling procedures
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a flow adjusting method and a flow adjusting system of a superheater, which belong to the field of flow adjustment of the superheater, wherein the flow adjusting system consists of a detection module, a steam drum and a regulating and controlling module, the detection module consists of a pressure detector and a flow detector, the regulating and controlling module consists of a heating burner and a flow regulator, the detection module detects the pressure and the flow in the steam drum, and the regulating and controlling module regulates the pressure and the flow in the steam drum. According to the invention, the detection module is used for detecting the internal air pressure and the water pressure of the steam drum and the pipe network communicated with the steam drum, and the regulation module is used for regulating the internal air pressure and the water pressure of the pipe network, so that the effect of indirectly regulating and controlling the flow of the superheater is achieved, when the power requirement of the steam turbine is increased, the internal air pressure of the superheated steam drum and the reheat steam drum is reduced by the air supply pump, and after the internal air pressure of the superheated steam drum and the reheat steam drum is reduced to the lower limit value, the boosting regulation is started, namely the saturated water is supplemented by the water supply pump, and meanwhile, the regulation burner is started to heat the saturated water and the steam in the pipe network of the superheater, so that the power requirement of the steam turbine is met.
Description
Technical Field
The invention relates to the technical field of flow adjustment of superheaters, in particular to a flow adjustment method and system of a superheater.
Background
Superheaters are devices that convert saturated or wet steam into superheated or dry steam, and the main advantage of using superheaters is the reduction of fuel and water consumption, but at the cost of increased maintenance.
The hoisting that sets up in the power plant boiler is had: water-cooled wall upper portion subassembly and bank hoist and mount, water-cooled wall middle part subassembly and bank hoist and mount, furnace upper portion superheater subassembly and bank hoist and mount, furnace export horizontal segment superheater or reheat subassembly and bank hoist and mount, afterbody package wall superheater subassembly and bank hoist and mount and afterbody low temperature reheater, low temperature superheater, economizer hoist and mount, and hoist and mount heating surface are heated in proper order, and the superheater system divide into in the boiler: the upper superheater of the hearth, the horizontal section superheater of the hearth outlet, the tail wall-wrapping superheater and the tail low-temperature superheater; the top of the superheater is provided with a steam drum which is conveyed to the steam turbine and can convey superheated steam.
In the process of entering steam and flowing out of steam, the steam enters and only depends on the evaporation of saturated water in a water cooling wall, and the steam flows out of the steam drum by means of the superheater after being heated and flows through a system, and the steam is conveyed by means of the steam pressure, so that the method for adjusting the conveying flow of the steam is lacking, and when the pressure of the steam in the superheater is overlarge, a pipeline is damaged, explosion is caused, and when the pressure of the steam in the superheater is overlarge, the power provided for a steam turbine is insufficient.
Therefore, we propose a flow adjustment method and system for superheater.
Disclosure of Invention
The invention aims to solve the problems that the pressure of steam in a superheater is unstable due to the lack of a regulating method of the flow of the superheater in the prior art, and a pipeline is damaged due to overlarge pressure and the pressure is too low to provide insufficient power for a steam turbine.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the flow regulation method and system for the superheater comprise a detection module, a steam drum and a regulation and control module, wherein the detection module comprises a pressure detector and a flow detector, the regulation and control module comprises a temperature-rising burner and a flow regulator, the detection module detects the pressure and the flow in the steam drum, and the regulation and control module regulates and controls the pressure and the flow in the steam drum.
Preferably, the steam drum comprises a water supply steam drum, an overheat steam drum, a reheat steam drum and an economizer steam drum, wherein the bottom of the water supply steam drum is communicated with a water cooling wall, the top of the water supply steam drum is communicated with a superheater pipe network, the top of the superheater pipe network is communicated with the overheat steam drum, the bottom of the reheat steam drum is provided with a reheat pipe network, the bottom of the economizer steam drum is communicated with an economizer pipe network, and the reheat steam drum is communicated with the water supply steam drum.
Preferably, the pressure detector is composed of an air pressure detector and a water pressure detector, the air pressure detector is arranged in the water supply steam drum, the overheat steam drum and the reheat steam drum, and the water pressure detector is arranged in the water cooling wall.
Preferably, the flow detector is a thermal flowmeter that detects steam flow at the top of the feedwater drum and the superheat drum.
Preferably, the temperature-rising burner consists of an inherent burner and a regulating burner, wherein the inherent burner is arranged inside the water-cooled wall, and when the pressure in the water supply steam drum is reduced, the regulating burner is started to heat the water-cooled wall.
Preferably, the flow regulator consists of a water feeding pump and a gas feeding pump, wherein the bottom of the economizer pipe network is provided with an economizer water feeding pot, the water feeding pump is arranged in a pipeline for communicating the economizer water feeding pot with a water feeding drum, and the gas feeding pump is arranged at the tops of the overheat drum and the reheat drum.
The flow regulating method of the superheater comprises the following specific regulating steps:
step S1: the natural burner is started to heat the water-cooled wall, the superheater pipe network, the reheat pipe network and the economizer pipe network during normal operation;
step S2: the method comprises the steps of directionally detecting, detecting air pressures in a water supply steam drum, an overheat steam drum and a reheat steam drum, and detecting water pressure in a water cooling wall;
step S3: the method comprises the steps of regulating and controlling flow, starting a regulating and controlling combustor and a water supply pump when the air pressure in the steam drum is reduced and the water pressure in the water cooling wall is reduced, further heating the steam drum, supplying saturated water in the water cooling wall, starting the water supply pump when the air pressure in the steam drum is increased and the water pressure in the water cooling wall is increased, and reducing the air pressure in the steam drum and the water pressure in the water cooling wall;
step S4: and (3) regulating circulation, after the air pressure in the steam drum and the water pressure in the water cooling wall are both increased to the lower limit value, closing the regulating burner and the water feeding pump, and after the air pressure in the steam drum and the water pressure in the water cooling wall are reduced to the upper limit value, closing the water feeding pump.
Preferably, in step S1, the steam flows to the steam turbine, and the water-cooled wall, the superheater pipe network, the reheat pipe network and the economizer pipe network are all disposed inside the utility boiler.
Preferably, in step S3, the reduction of the air pressure in the steam drum and the reduction of the water pressure in the water wall occur in the internal steam consumption, and the saturated water is not supplemented in time, so that the steam amount is reduced, the temperature is increased, and the increase of the air pressure in the steam drum and the increase of the water pressure in the water wall occur in the high-power operation of the steam turbine.
Compared with the prior art, the invention has the beneficial effects that:
1. the lack of regulation method of the flow of the superheater leads to unstable steam pressure in the superheater, the problem that the pipeline is damaged due to overlarge pressure and the pressure is too small to provide power for the steam turbine is solved, the internal condition of the pipe network of the superheater is known in real time by detecting the internal air pressure and the water pressure of the steam drum and the pipe network communicated with the steam drum through the detection module, and the internal air pressure and the water pressure of the superheater are regulated through the regulation module, so that the effect of indirectly regulating the flow of the superheater is achieved.
2. When the power requirement of the steam turbine is increased, the internal air pressures of the overheat steam drum and the reheat steam drum are reduced through the air supply pump, and after the internal air pressures of the overheat steam drum and the reheat steam drum are reduced to the lower limit value, the boosting regulation is started, namely saturated water is supplemented through the water supply pump, and meanwhile, the saturated water and steam in the pipe network of the superheater are heated through the regulating and controlling burner, so that the power requirement of the steam turbine is met.
Drawings
FIG. 1 is a block diagram of a superheater flow control system of a superheater flow control method and system according to the present invention;
fig. 2 is a flow chart illustrating specific steps of a flow adjustment method and a flow adjustment method for a superheater and a system according to the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
Examples
Referring to fig. 1-2, a flow adjustment method and system for a superheater is composed of a detection module, a steam drum and a regulation module, wherein the detection module is composed of a pressure detector and a flow detector, the regulation module is composed of a temperature-rising burner and a flow regulator, the detection module detects the pressure and the flow in the steam drum, and the regulation module regulates the pressure and the flow in the steam drum.
Based on the above, the steam drum comprises a water supply steam drum, an overheat steam drum, a reheat steam drum and an economizer steam drum, wherein the bottom of the water supply steam drum is communicated with a water cooling wall, the top of the water supply steam drum is communicated with a superheater pipe network, the top of the superheater pipe network is communicated with the overheat steam drum, the bottom of the reheat steam drum is provided with a reheat pipe network, the bottom of the economizer steam drum is communicated with an economizer pipe network, and the reheat steam drum is communicated with the water supply steam drum.
Based on the above, the pressure detector comprises an air pressure detector and a water pressure detector, wherein the air pressure detector is arranged in the water supply steam drum, the overheat steam drum and the reheat steam drum, and the water pressure detector is arranged in the water cooling wall.
Based on the above, the flow detector is a thermal flowmeter that detects the steam flow at the top of the feedwater drum and the superheated drum.
Based on the above, the temperature-rising burner consists of an inherent burner and a regulating burner, wherein the inherent burner is arranged inside the water-cooled wall, and when the pressure in the water supply steam drum is reduced, the regulating burner is started to heat the water-cooled wall.
Based on the above, the flow regulator comprises a water feeding pump and a water feeding pump, the bottom of the economizer pipe network is provided with an economizer water feeding pot, the water feeding pump is arranged in a pipeline for communicating the economizer water feeding pot with the water feeding steam drum, and the water feeding pump is arranged at the tops of the overheat steam drum and the reheat steam drum.
Based on the above, the air pressure detector, the water pressure detector and the thermal flowmeter are all existing devices, and will not be described in detail below.
The flow regulating method of the superheater comprises the following specific regulating steps:
step S1: the natural burner is started to heat the water-cooled wall, the superheater pipe network, the reheat pipe network and the economizer pipe network during normal operation;
step S2: the method comprises the steps of directionally detecting, detecting air pressures in a water supply steam drum, an overheat steam drum and a reheat steam drum, and detecting water pressure in a water cooling wall;
step S3: the method comprises the steps of regulating and controlling flow, starting a regulating and controlling combustor and a water supply pump when the air pressure in the steam drum is reduced and the water pressure in the water cooling wall is reduced, further heating the steam drum, supplying saturated water in the water cooling wall, starting the water supply pump when the air pressure in the steam drum is increased and the water pressure in the water cooling wall is increased, and reducing the air pressure in the steam drum and the water pressure in the water cooling wall;
step S4: and (3) regulating circulation, after the air pressure in the steam drum and the water pressure in the water cooling wall are both increased to the lower limit value, closing the regulating burner and the water feeding pump, and after the air pressure in the steam drum and the water pressure in the water cooling wall are reduced to the upper limit value, closing the water feeding pump.
Based on the above, in step S1, the steam flows to the steam turbine, and the water wall, the superheater pipe network, the reheat pipe network and the economizer pipe network are all disposed inside the utility boiler.
Based on the above, in step S3, the decrease of the air pressure in the steam drum and the decrease of the water pressure in the water wall occur in the internal steam consumption, and the saturated water is not supplemented in time, so that the steam amount decreases, the temperature increases, and the increase of the air pressure in the steam drum and the water pressure in the water wall occur in the high power operation of the steam turbine.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. The flow adjustment system of the superheater is characterized by comprising a detection module, a steam drum and a regulation and control module, wherein the detection module comprises a pressure detector and a flow detector, the regulation and control module comprises a temperature-rising burner and a flow regulator, the detection module detects the pressure and the flow in the steam drum, and the regulation and control module regulates and controls the pressure and the flow in the steam drum.
2. The superheater flow control system of claim 1, wherein the steam drum comprises a feedwater steam drum, a superheated steam drum, a reheat steam drum and an economizer steam drum, wherein the water cooled wall is communicated with the bottom of the feedwater steam drum, the superheater tube network is communicated with the top of the feedwater steam drum, the superheater tube network is communicated with the superheated steam drum, the reheat steam drum is provided with a reheat tube network at the bottom, the economizer steam drum is communicated with the economizer tube network, and the reheat steam drum is communicated with the feedwater steam drum.
3. The superheater flow adjustment system according to claim 2, wherein the pressure detector is composed of an air pressure detector and a water pressure detector, the air pressure detector is disposed inside a feedwater drum, a superheated drum and a reheat drum, and the water pressure detector is disposed inside a water wall.
4. A superheater flow regulation system as claimed in claim 2, wherein the flow detector is a thermal flow meter that detects steam flow from the feedwater drum and the top of the superheating drum.
5. The flow regulating system of a superheater as claimed in claim 2, wherein the temperature-increasing burner comprises an intrinsic burner and a regulating burner, the intrinsic burner is disposed inside the water-cooled wall, and the regulating burner is started to increase the temperature of the water-cooled wall when the pressure in the feedwater drum is reduced.
6. The flow regulating system of a superheater as claimed in claim 2, wherein the flow regulator comprises a water feed pump and a gas feed pump, the economizer water feed pan is arranged at the bottom of the economizer pipe network, the water feed pump is arranged in a pipeline for communicating the economizer water feed pan with a water feed drum, and the gas feed pump is arranged at the tops of the superheated drum and the reheat drum.
7. A method for regulating the flow of a superheater, comprising all the devices in claims 1-6, characterized in that the method comprises the following specific regulating steps:
step S1: the natural burner is started to heat the water-cooled wall, the superheater pipe network, the reheat pipe network and the economizer pipe network during normal operation;
step S2: the method comprises the steps of directionally detecting, detecting air pressures in a water supply steam drum, an overheat steam drum and a reheat steam drum, and detecting water pressure in a water cooling wall;
step S3: the method comprises the steps of regulating and controlling flow, starting a regulating and controlling combustor and a water supply pump when the air pressure in the steam drum is reduced and the water pressure in the water cooling wall is reduced, further heating the steam drum, supplying saturated water in the water cooling wall, starting the water supply pump when the air pressure in the steam drum is increased and the water pressure in the water cooling wall is increased, and reducing the air pressure in the steam drum and the water pressure in the water cooling wall;
step S4: and (3) regulating circulation, after the air pressure in the steam drum and the water pressure in the water cooling wall are both increased to the lower limit value, closing the regulating burner and the water feeding pump, and after the air pressure in the steam drum and the water pressure in the water cooling wall are reduced to the upper limit value, closing the water feeding pump.
8. The method according to claim 7, wherein in the step S1, the steam flows to the steam turbine, and the water wall, the superheater pipe network, the reheat pipe network and the economizer pipe network are all disposed inside the utility boiler.
9. The method according to claim 8, wherein in step S3, the decrease in the pressure of the air in the drum and the decrease in the pressure of the water in the water wall occur
The saturated water is not supplemented in time due to the internal steam consumption, so that the steam quantity is reduced, the temperature is increased,
the pressure rise in the steam drum and the water pressure rise in the water-cooled wall occur during high-power operation of the steam turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311049039.8A CN117028970A (en) | 2023-08-18 | 2023-08-18 | Flow adjustment method and system for superheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311049039.8A CN117028970A (en) | 2023-08-18 | 2023-08-18 | Flow adjustment method and system for superheater |
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| Publication Number | Publication Date |
|---|---|
| CN117028970A true CN117028970A (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311049039.8A Pending CN117028970A (en) | 2023-08-18 | 2023-08-18 | Flow adjustment method and system for superheater |
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| Country | Link |
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| CN (1) | CN117028970A (en) |
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2023
- 2023-08-18 CN CN202311049039.8A patent/CN117028970A/en active Pending
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