CN202547737U - Online power plant feedwater flow calibration device based on heat balance - Google Patents
Online power plant feedwater flow calibration device based on heat balance Download PDFInfo
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- CN202547737U CN202547737U CN201220096408XU CN201220096408U CN202547737U CN 202547737 U CN202547737 U CN 202547737U CN 201220096408X U CN201220096408X U CN 201220096408XU CN 201220096408 U CN201220096408 U CN 201220096408U CN 202547737 U CN202547737 U CN 202547737U
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- power plant
- temperature sensor
- feedwater
- feedwater flow
- sensor
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000012795 verification Methods 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
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Abstract
The utility model relates to an online power plant feedwater flow calibration device based on heat balance. The online power plant feedwater flow calibration device comprises a pressure sensor and a temperature sensor which are distributed on a water inlet pipeline of a high-pressure feedwater heater which is arranged at the last stage of a power plant, a temperature sensor arranged on a water outlet pipeline of the feedwater heater, a pressure sensor and a temperature sensor which are arranged on a steam admission pipeline of the feedwater heater, a temperature sensor and a flow sensor which are arranged on a drain pipeline of the feedwater heater, a data acquisition unit and a calculation display device; and the sensors are connected with the calculation display device through the data acquisition unit. The calibration device is used for achieving the online feedwater flow calibration of the power plant running normally, ensures the accuracy of important measurement data on the feedwater flow of the power plant, can provide accurate data for calculation of economic indexes on the running of the power plant, and provides a basis for energy conservation and consumption reduction of the power plant.
Description
Technical field
The utility model relates to a kind of based on thermally equilibrated power plant feedwater flow on-line testing device.
Background technology
Feedwater flow is the important evidence that economy of power plant property index is calculated, but the feedwater flow measurement mechanism of power plant all is in the running status of HTHP, and its accuracy is difficult to guarantee behind the long-play.With the Subcritical Units is example, and the operational factor of measurement mechanism position is up to 18MPa, about 270 ℃ usually.The feedwater flow measurement mechanism is after operation after a while; Its internal state can't be checked; Gaging nozzle surface wash away and sediment also can't detect; This mainly is because flow nozzle and pipeline are welded condition, and feedwater piping is thickness structure (wall thickness can reach 25mm), and strip inspection is difficult.
Feedwater flow is the important evidence that economy of power plant property index is calculated, and its accuracy need be come verification through certain measure and method.Generally lack the verification means at present, guarantee its accuracy.Therefore develop a kind of novel a kind of based on thermally equilibrated power plant feedwater flow on-line testing device, necessary.
The utility model content
It is a kind of based on thermally equilibrated power plant feedwater flow on-line testing device that the purpose of the utility model just is to provide, and is the technological means of a kind of effectively and accurately verification power plant this important parameter of feedwater flow.
The utility model adopts as follows
Technical scheme:
The utility model is a kind of based on thermally equilibrated power plant feedwater flow on-line testing device, and it comprises the pressure transducer and the temperature sensor that are arranged on power plant's final stage high-pressure feed-water heater inlet channel, be arranged on temperature sensor on the feed-water heater outlet conduit, be arranged on pressure transducer and temperature sensor on the feed-water heater admission pipeline, be arranged on temperature sensor and flow sensor and data acquisition unit and calculation display device on the feed-water heater drain water piping; Described sensor is connected to the calculation display device through data acquisition unit.
The flow sensor that the utility model adopts is that primary element is a flow-through orifice; And employing high precision differential pressure transmitter measuring-signal; Measuring sensor and pipeline are welded structure; And be installed in the drain water piping bypass at the normal drain water piping operation valve upper reaches, can control its input or withdraw from through transfer valve.Each sensor of the utility model at first with through signal connecting line is connected with data acquisition unit, is connected through the usb data transmission line between data acquisition unit and the calculation display PC, and can arranges communications protocol.
The principle of the feedwater flow on-line testing of the utility model is following:
For the final stage high-pressure heater, its thermally equilibrated formula is following:
F
fw×(H(P
fw,T
2)-H(P
fw,T
1))=?F
d×(H(P
s,T
s)-H(P
s,T
d))
In the formula, F
FwBe feedwater flow, units/s; F
dBe hydrophobic flow, units/s; P
FwBe feed pressure, units MPa; T
1And T
2Be respectively feed-water inlet temperature and outlet temperature, unit ℃.P
sBe initial steam pressure, units MPa; T
sAnd T
dBe respectively throttle (steam) temperature and drain temperature, unit ℃.(P T) is the function of enthalpy to H.
By formula (1), can push away:
F
fw?=?F
d×(H(P
s,T
s)-H(P
s,T
d))?/?(H(P
fw,T
2)-H(P
fw,T
1))
The utility model
Good effectAs follows: adopt externally measured and calculation mode on the flow measurement principle of the utility model; Mainly be through the sensor on each Inlet and outlet water of final stage high-pressure heater and admission, the drain water piping; Pass through data acquisition unit after obtaining data, finally in calculation display PC unit, realize calculating and showing.
Use the utility model to solve the on-line testing problem of normal power plant in service feedwater flow; Guarantee the accuracy of power plant's this important measurement data of feedwater flow; Can accurate data be provided for the calculating of power plant's performance driving economy index, and be the energy-saving and cost-reducing foundation that provides of power plant.Solved this problem, can carry out continuous or periodic verification, guaranteed the accuracy of its measurement power plant's feedwater flow.
Description of drawings
Fig. 1 is the utility model embodiment theory diagram.
Embodiment
The utility model embodiment is a kind of based on thermally equilibrated power plant feedwater flow on-line testing device shown in accompanying drawing, and it comprises the pressure transducer and the temperature sensor that are arranged on power plant's final stage high-pressure feed-water heater inlet channel, be arranged on temperature sensor on the feed-water heater outlet conduit, be arranged on pressure transducer and temperature sensor on the feed-water heater admission pipeline, be arranged on temperature sensor and flow sensor and data acquisition unit and calculation display device on the feed-water heater drain water piping; Described sensor is connected to the calculation display device through data acquisition unit.
In useAt first the hydrophobic pipeline of on-the-spot final stage high-pressure heater is arranged and carried out suitable change.According to the piping arrangement situation at scene, on the drain water piping before getting into normal hydrophobic operation valve, increase a pipeline bypass and corresponding two transfer valves.The flow development length of pipeline bypass before transfer valve that increases is no less than 35 times of pipe diameter length.
Follow pressure transducer and the temperature sensor of mounting arrangements on power plant's final stage high-pressure feed-water heater inlet channel; Temperature sensor on the feed-water heater outlet conduit; Pressure transducer and temperature sensor on the feed-water heater admission pipeline, temperature sensor on the feed-water heater drain water piping and flow sensor.Pressure transducer links to each other with pressure tube through jointing, and temperature sensor then directly inserts in the temperature survey sleeve pipe.When the sensor connecting line is connected with data acquisition unit, can pickup wire be passed through bolted on the terminal of data acquisition unit.The connection that connects data acquisition unit unit and calculation display PC unit.
Turn-on data collector unit at calculation display device service data capture program, can be shown to the measurement data of water heater all the sensors in real time.
According to measurement data operation calculation procedure, demonstrate the result of calculation of feedwater flow.
This device should be noted after the pressure survey sensor installs, needing the isolation valve of opening pressure pressure tube in using.After this device is finished using, at first behind the isolation valve of closing presure pressure tube, can dismantle the pressure survey sensor during dismounting.
Claims (1)
1. one kind based on thermally equilibrated power plant feedwater flow on-line testing device, it is characterized in that it comprises the pressure transducer and the temperature sensor that are arranged on power plant's final stage high-pressure feed-water heater inlet channel, is arranged on temperature sensor on the feed-water heater outlet conduit, is arranged on pressure transducer and temperature sensor on the feed-water heater admission pipeline, is arranged on temperature sensor and flow sensor and data acquisition unit and calculation display device on the feed-water heater drain water piping; Described sensor is connected to the calculation display device through data acquisition unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220096408XU CN202547737U (en) | 2012-03-15 | 2012-03-15 | Online power plant feedwater flow calibration device based on heat balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220096408XU CN202547737U (en) | 2012-03-15 | 2012-03-15 | Online power plant feedwater flow calibration device based on heat balance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202547737U true CN202547737U (en) | 2012-11-21 |
Family
ID=47168355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220096408XU Expired - Fee Related CN202547737U (en) | 2012-03-15 | 2012-03-15 | Online power plant feedwater flow calibration device based on heat balance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202547737U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411611A (en) * | 2019-07-24 | 2019-11-05 | 河北冀研能源科学技术研究院有限公司 | A kind of high-precision Gateway Station in Heating Network heating load capacity checking device |
| CN110987498A (en) * | 2019-12-16 | 2020-04-10 | 广西电网有限责任公司电力科学研究院 | Horizontal high-pressure heater heat exchange efficiency online monitoring system and method |
-
2012
- 2012-03-15 CN CN201220096408XU patent/CN202547737U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411611A (en) * | 2019-07-24 | 2019-11-05 | 河北冀研能源科学技术研究院有限公司 | A kind of high-precision Gateway Station in Heating Network heating load capacity checking device |
| CN110987498A (en) * | 2019-12-16 | 2020-04-10 | 广西电网有限责任公司电力科学研究院 | Horizontal high-pressure heater heat exchange efficiency online monitoring system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HEBEI ELECTRIC POWER CORPORATION ELECTRIC POWER RE Free format text: FORMER OWNER: HEBEI ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20130321 Owner name: STATE ELECTRIC NET CROP. HEBEI ELECTRIC POWER CONS Effective date: 20130321 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 050000 SHIJIAZHUANG, HEBEI PROVINCE TO: 050021 SHIJIAZHUANG, HEBEI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130321 Address after: 050021 Shijiazhuang Province, Yuhua Province Sports street, South Street, No. 238, No. Patentee after: Electric Power Research Institute of Hebei Electric Power Corporation Patentee after: State Grid Corporation of China Patentee after: Hebei Electric Power Construction & Adjustment Research Institute Address before: 050000 Hebei city of Shijiazhuang Province Sports No. 238 South Street Patentee before: Hebei Electric Power Research Institute |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20160315 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |