CN209764641U - Low pressure jar of thermal power plant exhaust dryness fraction measuring device - Google Patents
Low pressure jar of thermal power plant exhaust dryness fraction measuring device Download PDFInfo
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- CN209764641U CN209764641U CN201920396376.7U CN201920396376U CN209764641U CN 209764641 U CN209764641 U CN 209764641U CN 201920396376 U CN201920396376 U CN 201920396376U CN 209764641 U CN209764641 U CN 209764641U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000004364 calculation method Methods 0.000 claims description 19
- 238000005485 electric heating Methods 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model discloses a low pressure cylinder exhaust steam dryness measuring device of thermal power plant, including the condenser, the output of condenser is provided with steam conduit, low pressure cylinder is all installed to the both sides at condenser top, the top install the stop valve, steam conduit keeps away from the one end of condenser and is provided with electric heater unit, electric heater unit keeps away from steam conduit's one end and is connected with the pneumatic accent door, electric heater unit has the electric power switch board through wire electric connection. The utility model discloses an mutually supporting of electric heater unit, pressure transmitter and thermal resistance has realized real-time supervision, makes the steam that comes out from electric heater unit be in dry saturation or overheated state to avoid the theory to deduce the inaccuracy of calculating low cylinder exhaust steam dryness fraction, and calculate the enthalpy value of exhaust steam through enthalpy value, steam flow and electric heater unit's of water and steam nature on-line computation model drop electric heater unit export steam, and then calculate the steam dryness fraction.
Description
Technical Field
The utility model relates to a thermal power plant equipment technical field specifically is a thermal power plant low pressure cylinder steam extraction dryness fraction measuring device.
Background
The measurement of the exhaust steam dryness of the low-pressure cylinder is a great problem in the field of thermal power plants, and in the calculation of economic indexes of the thermal power plants, the determination of the exhaust steam dryness of the low-pressure cylinder plays a great role, because the exhaust steam enthalpy value of the low-pressure cylinder can be obtained only through the exhaust steam dryness of the low-pressure cylinder, and the calculation of the cylinder efficiency of the low-pressure cylinder, the calculation of the low-pressure cylinder work and the like all need the exhaust steam enthalpy value of the low-pressure cylinder.
The exhaust steam of the low-pressure cylinder is wet steam in a saturated state, because the enthalpy values of the wet steam and the dry steam in the saturated state are different, the enthalpy value cannot be obtained only by two parameters of pressure and temperature, and only approximate numerical values can be obtained through the positive sequence calculation and the negative sequence calculation programmed by a computer program, so that the enthalpy value cannot be accurately reflected, some measurement equipment cannot be converged, the existing measurement equipment in the industry is not mature, and the measurement equipment cannot meet the precision requirement due to the complexity of the wet saturated steam.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the device for measuring the dryness of the exhausted steam of the low-pressure cylinder of the thermal power plant aims to solve the problems that the positive sequence calculation and the negative sequence calculation programmed by a computer program can only obtain approximate numerical values, cannot be accurately reflected, some cannot even converge, measuring equipment in the industry is not mature at present, and the measuring equipment cannot meet the precision requirement due to the complexity of wet saturated steam.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a low pressure cylinder exhaust steam dryness measuring device of thermal power plant, includes the condenser, the output of condenser is provided with steam conduit, the low pressure cylinder is all installed to the both sides at condenser top, the top install the stop valve, steam conduit keeps away from the one end of condenser and is provided with electric heater unit, the one end that steam conduit was kept away from to electric heater unit is connected with the pneumatic control gate, electric heater unit has the electric power switch board through wire electric connection, the one end that electric heater unit was kept away from to the pneumatic control gate is installed the pressure regulating pump, the one end that the pneumatic control gate was kept away from to the pressure regulating pump is provided with the flowmeter.
Preferably, a pipeline is arranged at one end of the steam-operated damper close to the electric heating device, and the steam-operated damper is communicated with the electric heating device through the pipeline.
Preferably, the top of the pipeline and the steam pipeline are sequentially provided with a thermal resistor and a pressure transmitter from left to right.
Preferably, the output ends of the thermal resistor and the pressure transmitter are electrically connected with a water and water vapor property online calculation model.
Preferably, the water and steam property online calculation model is used for calculating the steam enthalpy value.
Preferably, the end of the flow meter remote from the pressure regulating pump is in gas flow communication with the outside.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an electric heater unit, mutually supporting of pressure transmitter and thermal resistance, real-time supervision has been realized, make the steam that comes out from electric heater unit be in dry saturation or overheated state, thereby the inaccuracy of theoretical derivation calculation low pressure cylinder exhaust dryness fraction has been avoided, and through the enthalpy value of water and steam nature on-line computation model drop electric heater unit export steam, the enthalpy value of exhaust steam is calculated out with electric heater unit's power to steam flow, and then calculate the steam dryness fraction, thereby make the calculation part more accurate, and make the required precision that satisfies that this kind of measuring equipment can be better.
Drawings
Fig. 1 is a schematic diagram of an embodiment of the present invention.
In the figure: 1. a condenser; 2. an electric heating device; 3. a thermal resistor; 4. a pressure transmitter; 5. a pneumatic throttle; 6. a pressure regulating pump; 7. a flow meter; 8. an electric power control cabinet; 9. a water and water vapor property online calculation model; 10. a low pressure cylinder; 11. a stop valve; 12. a steam pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The condenser (model is N-49500-1), thermal resistor, pressure transmitter (model is EJA110A), pressure regulating pump (model is DKER6-DCT-06), flowmeter (model is YYD) and low pressure cylinder (model is C135) mentioned in the utility model can all be obtained in market or private order.
Please refer to fig. 1, a steam dryness measuring device for low pressure cylinder of thermal power plant, including a condenser 1, an output end of the condenser 1 is provided with a steam pipe 12, both sides of a top of the condenser 1 are provided with low pressure cylinders 10, a stop valve 11 is installed at the top of the condenser, one end of the steam pipe 12 away from the condenser 1 is provided with an electric heating device 2, one end of the electric heating device 2 away from the steam pipe 12 is connected with a pneumatic throttle 5, the electric heating device 2 is electrically connected with an electric power control cabinet 8 through a wire, one end of the pneumatic throttle 5 away from the electric heating device 2 is provided with a pressure regulating pump 6, one end of the pressure regulating pump 6 away from the pneumatic throttle 5 is provided with a flow meter 7.
The utility model discloses a stop valve 11 (manual or electric valve) can accomplish to install additional being connected and isolated of pipeline and steam conduit 12 at any time, through electric heating device 2's adjustment function, accomplishes the cooperation of electric power and steam in the pipeline, makes the steam after deriving electric heating device 2 reach dry saturation state or overheated state, and through pneumatic governor 5 and pressure regulating pump 6, has realized that the steam pressure of installing the pipeline additional equals with the pressure of exhaust steam pipe way.
Please refer to fig. 1, a pipeline is disposed at an end of the pneumatic damper 5 close to the electric heating device 2, and the pneumatic damper 5 is connected to the electric heating device 2 through the pipeline.
This kind of thermal power plant's low pressure cylinder steam extraction dryness fraction measuring device makes pneumatic control valve 5 and electric heater unit 2 intercommunication through the pipeline, and better messenger's steam passes through electric heater unit 2 to the steam that makes to derive from electric heater unit 2 is in dry saturation state or overheated state.
Referring to fig. 1, a thermal resistor 3 and a pressure transmitter 4 are installed on the top of the pipe and the steam pipe 12 in sequence from left to right.
This kind of thermal power plant's low cylinder steam extraction dryness fraction measuring device is through and through mutually supporting of electric heating device 2, pressure transmitter 4, thermal resistance 3, has realized real-time supervision, and makes the steam of deriving from electric heating device 2 be in futilely saturation state or overheated state to the result that makes and reachs is more accurate, thereby has improved the rate of utilization.
Please refer to fig. 1, the output ends of the thermal resistor 3 and the pressure transmitter 4 are electrically connected with an online calculation model 9 for water and steam properties.
This kind of thermal power plant's low pressure jar exhaust steam dryness measuring device deduces the enthalpy value of exhaust steam through the enthalpy value, the steam flow of electric heater unit 2 derivation steam and electric heater unit 2's power to electric heater unit 2 through water and steam property on-line computation model 9, and then calculates the steam dryness to make the calculated part more accurate, and make the required precision of satisfying that this kind of measuring equipment can be better.
Referring to fig. 1, the on-line calculation model 9 of the water and steam properties is used to calculate the enthalpy of the steam, and the end of the flow meter 7 remote from the pressure regulating pump 6 is connected to the outside air flow.
The device for measuring the dryness of the discharged steam of the low-pressure cylinder of the thermal power plant calculates the enthalpy of the discharged steam by the enthalpy value, the steam flow and the power of the electric heating device 2 derived from the online calculation model 9 of the properties of water and steam, and further calculates the dryness of the steam, thereby enabling the calculation part to be more accurate.
The working principle is as follows: when the device is used, the device is preheated, the device is fully heated, the pressure and the temperature of a steam pipeline 12 are the same as the steam pressure, the temperature and the humidity of a steam exhaust pipeline of a low-pressure cylinder 10 by adjusting the opening degree of a steam adjusting valve 5 and a pressure adjusting pump 6, after the state is stable, the electric heating device 2 is continuously adjusted, the pressure value and the temperature value of an outlet of the electric heating device 2 are continuously monitored, real-time acquired data are substituted into a water and steam property online calculation model 9, the steam property is further judged, when the steam is monitored to be superheated steam or dry saturated steam, the electric heating device 2 is stopped being adjusted, the device is kept running under the electric power, the steam enthalpy value is calculated according to the pressure and the temperature under the state, the steam flow and the electric power under the state are recorded, the enthalpy value of the steam exhaust pipeline of the low-pressure cylinder 10 are calculated according to the parameters, and the steam exhaust pressure of the low-pressure cylinder, The temperature calculates the dryness of the steam.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a low pressure cylinder exhaust steam dryness measuring device of thermal power plant, includes condenser (1), its characterized in that: the output of condenser (1) is provided with steam conduit (12), low pressure cylinder (10) are all installed to the both sides at condenser (1) top, the top install stop valve (11), the one end that condenser (1) was kept away from in steam conduit (12) is provided with electric heater unit (2), the one end that steam conduit (12) were kept away from in electric heater unit (2) is connected with pneumatic governor (5), electric heater unit (2) have electric power switch board (8) through wire electric connection, pneumatic governor (5) are kept away from the one end of electric heater unit (2) and are installed pressure regulating pump (6), the one end that pneumatic governor (5) were kept away from in pressure regulating pump (6) is provided with flowmeter (7).
2. The device for measuring the dryness of the exhaust steam of the low-pressure cylinder of the thermal power plant as claimed in claim 1, wherein: and one end of the pneumatic adjusting valve (5) close to the electric heating device (2) is provided with a pipeline, and the pneumatic adjusting valve (5) is communicated with the electric heating device (2) through the pipeline.
3. The device for measuring the dryness of the exhaust steam of the low-pressure cylinder of the thermal power plant as claimed in claim 2, wherein: the top of the pipeline and the steam pipeline (12) are sequentially provided with a thermal resistor (3) and a pressure transmitter (4) from left to right.
4. The device for measuring the dryness of the exhaust steam of the low-pressure cylinder of the thermal power plant as claimed in claim 3, wherein: the output ends of the thermal resistor (3) and the pressure transmitter (4) are electrically connected with a water and water vapor property online calculation model (9).
5. The device for measuring the dryness of the exhaust steam of the low-pressure cylinder of the thermal power plant as claimed in claim 4, wherein: the water and steam property online calculation model (9) is used for calculating the enthalpy value of the steam.
6. The device for measuring the dryness of the exhaust steam of the low-pressure cylinder of the thermal power plant as claimed in claim 1, wherein: and one end of the flow meter (7) far away from the pressure regulating pump (6) is communicated with outside air flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920396376.7U CN209764641U (en) | 2019-03-21 | 2019-03-21 | Low pressure jar of thermal power plant exhaust dryness fraction measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920396376.7U CN209764641U (en) | 2019-03-21 | 2019-03-21 | Low pressure jar of thermal power plant exhaust dryness fraction measuring device |
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| CN209764641U true CN209764641U (en) | 2019-12-10 |
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| CN201920396376.7U Active CN209764641U (en) | 2019-03-21 | 2019-03-21 | Low pressure jar of thermal power plant exhaust dryness fraction measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113597215A (en) * | 2021-07-29 | 2021-11-02 | 苏州浪潮智能科技有限公司 | System, method and device for adjusting flow of parallel branch of two-phase cold plate liquid cooling system |
-
2019
- 2019-03-21 CN CN201920396376.7U patent/CN209764641U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113597215A (en) * | 2021-07-29 | 2021-11-02 | 苏州浪潮智能科技有限公司 | System, method and device for adjusting flow of parallel branch of two-phase cold plate liquid cooling system |
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Effective date of registration: 20231115 Address after: 026000 Shenhua Building, Xilin Street, Xilinhot City, Inner Mongolia Autonomous Region Patentee after: Shenhua Energy Co.,Ltd. Shengli Energy Branch Address before: 026000 No.401, unit 2, building 13, Shengli Jiayuan community, Xilin street, Xilinhot City, Xilin Gol League, Inner Mongolia Autonomous Region Patentee before: Zhang Weibin |