CN203259196U - Testing device for flow of boiler feed water - Google Patents
Testing device for flow of boiler feed water Download PDFInfo
- Publication number
- CN203259196U CN203259196U CN 201320207041 CN201320207041U CN203259196U CN 203259196 U CN203259196 U CN 203259196U CN 201320207041 CN201320207041 CN 201320207041 CN 201320207041 U CN201320207041 U CN 201320207041U CN 203259196 U CN203259196 U CN 203259196U
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- flow
- feed water
- boiler
- transducer
- boiler feed
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 title abstract description 6
- 238000009434 installation Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000004891 communication Methods 0.000 abstract description 3
- 238000013480 data collection Methods 0.000 abstract 3
- 238000012937 correction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
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Abstract
The utility model discloses a testing device for flow of boiler feed water. The testing device for the flow of the boiler feed water is used for monitoring the flow of the boiler feed water in the process of normal operation of a power plant. The testing device for the flow of the boiler feed water comprises a pressure difference transducer, a pressure transducer, a temperature transducer, a data collection unit and a calculation and display unit, wherein the pressure difference transducer, the pressure transducer and the temperature transducer are installed on a feed water straight pipeline between a high-pressure heater and an inlet of a boiler, the output end of the pressure difference transducer, the output end of the pressure transducer and the output end of the temperature transducer are connected with corresponding input ends of the data collection unit respectively, and the data collection unit and the calculation and display unit are in both-way connection through communication lines. The testing device for the flow of the boiler feed water is simple in structure, easy to construct and measure, and capable of providing accurate data for measurement of the flow of the boiler feed water in the process of normal operation of the power plant.
Description
Technical field
The utility model relates to a kind of boiler feedwater flow proving installation, is used for the normal operating boiler feedwater flow of monitoring power plant.
Background technology
Along with the increasing of national energy-saving and reduction of discharging pressure, the economy of Turbo-generator Set operation has obtained increasing attention.Power Plant is in service, and boiler feedwater flow is directly relevant with the economy of unit operation, is the important monitoring parameter of unit operation.Usually, boiler feed temperature is higher, adopts simple method of calculating flux can produce larger measuring error in the Power Plant DCS control system.
The utility model content
Technical problem to be solved in the utility model provide a kind of simple in structure, measure accurately, with the boiler feedwater flow proving installation of temperature funtion correction.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of boiler feedwater flow proving installation comprises differential pressure pickup, pressure transducer, temperature sensor, data acquisition unit and calculating and display unit; Described differential pressure pickup, pressure transducer and temperature sensor are installed on the straight pipeline that feeds water between high-pressure heater and the boiler inlet; The output terminal of described differential pressure pickup, pressure transducer and the temperature sensor respectively input end corresponding with data acquisition unit is connected; Be connected by connection is two-way between described data acquisition unit and calculating and the display unit.
Each 1 of described pressure transducer and temperature sensor are installed on the straight pipeline that feeds water between high-pressure heater and the boiler inlet.
The differential pressure pick-up of described test traffic has 1, is installed on the straight pipeline that feeds water between high-pressure heater and the boiler inlet, requires the feedwater straight pipeline Upstream section length (feedwater straight pipeline length between high-pressure heater side and the differential pressure pickup) of differential pressure pick-up
L u 
30 times of feedwater straight pipeline diameters, downstream feedwater straight pipeline length (the feedwater straight pipeline length between boiler inlet side and the differential pressure pickup)
L d 
10 times of feedwater straight pipeline diameters.
The model of described data acquisition unit is OM-DAQPRO-5300.
The beneficial effect that adopts technique scheme to produce is:
The utility model mainly is by being installed in differential pressure pick-up, pressure transducer and the temperature sensor measurement data on the feedwater straight pipeline between high-pressure heater and the boiler inlet, process and storage through data acquisition unit, finally in calculating and display unit, realize data calculating, process and show.The utility model has solved the Real-Time Monitoring problem of power plant's operating unit boiler feedwater flow, not only one-piece construction is fairly simple, and it is convenient to measure, can provide foundation for the economical operation of instructing Power Plant, solved the larger problem of the general deviation of boiler feedwater flow displayed value in the present Power Plant DCS System, for the running status of monitoring Power Plant provides accurate data.
Description of drawings
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is the layout synoptic diagram of the utility model sensor.
In Fig. 1-2,1 is differential pressure pickup; 2 is pressure transducer; 3 is temperature sensor; 4 is data acquisition unit; 5 for calculating and display unit; 6 is boiler; 7 is high-pressure heater;
L uBe the feedwater straight pipeline Upstream section length of differential pressure pick-up,
L dBe the flow development length in differential pressure pick-up downstream, unit is m.
Embodiment
By the embodiment shown in Fig. 1-2 as can be known, present embodiment comprises differential pressure pick-up 1, pressure transducer 2, temperature sensor 3, data acquisition unit 4 and calculating and display unit 5; Described differential pressure pick-up 1, pressure transducer 2 and temperature sensor 3 are installed between boiler 6 and the high-pressure heater 7 on the boiler feed water straight pipeline; Each output terminal of described differential pressure pick-up 1, pressure transducer 2 and temperature sensor 3 the respectively input end corresponding with data acquisition unit 4 is connected; The output terminal of described data acquisition unit 4 is connected with the input end of calculating and display unit 5; The calculating of described boiler feedwater flow and display unit 5 are notebook computer or host computer and display, and described notebook computer or host computer are mounted with the software for calculation of boiler feedwater flow; The model of described data acquisition unit 4 is OM-DAQPRO-5300.
Described differential pressure pick-up 1, pressure transducer 2 and temperature sensor 3 all can provide the output signal of 4～20mA, and described data acquisition unit 4 can receive three's output signal.
During mounting temperature sensor 3, need to the temperature survey sleeve pipe be installed at the boiler feed water straight pipeline, described temperature sensor 3 directly inserts in the temperature survey sleeve pipe to be measured.
When the differential pressure pickup 1 on the boiler feed water pipeline is installed, need to corresponding flow measurement orifice plate or nozzle be installed at the feedwater straight pipeline, differential pressure pickup 1 directly is connected with supporting measuring diaphragm or nozzle by jointing.
The connecting line of present embodiment all the sensors output terminal all is fixed on the described data acquisition unit 4 corresponding input terminals by the mode of bolted, be connected by usb communication line is two-way between described data acquisition unit 4 and calculating and the display unit 5, communications protocol adopts USB 1.1.
To sum up, present embodiment obtains measurement data by differential pressure pickup 1, pressure transducer 2 and temperature sensor 3, then the data-signal of measuring is passed to data acquisition unit 4, carries out flow rate calculation and demonstration by calculating and display unit 5 at last.
The calculation expression of flow is:
In the formula:
Be orifice plate or nozzle efflux coefficient (this coefficient is provided by orifice plate or the nozzle calculation specification of supply of material producer);
Be the expansion coefficient of fluid, value is 1;
Be the orifice plate under the running status or nozzle throat diameter (these data are provided by orifice plate or the nozzle calculation specification of supply of material producer), unit is m;
Be orifice plate or nozzle measurement differential pressure, unit is Pa;
Be the density of actual measurement medium, unit is kg/m3;
Be the orifice plate under the actual motion state or the nozzle throat diameter ratio (these data are provided by orifice plate or the nozzle calculation specification of supply of material producer) with pipe diameter.
According under the observed temperature to the correction factor of Media density, can obtain to survey the density of medium, its expression formula is:
In the formula:
Be the density of boiler feed water 250 ℃ time the, units/kg/m
3 
For under the observed temperature to the correction factor of Media density, can carry out interpolation calculation by table 1 parameter and obtain.
Under table 1 different temperatures to the correction factor of Media density
Computing method of the present utility model are simple, measure accurately, and by the power plant boiler feedwater flow is carried out Real-Time Monitoring, can provide foundation for the economical operation of instructing power plant's heat supply unit, satisfied the needs of Power Plant economy operation.
Claims (3)
1. a boiler feedwater flow proving installation is characterized in that: comprise differential pressure pickup (1), pressure transducer (2), temperature sensor (3), data acquisition unit (4) and calculating and display unit (5); Described differential pressure pickup (1), pressure transducer (2) and temperature sensor (3) are installed on the straight pipeline that feeds water between high-pressure heater and the boiler inlet; Described differential pressure pickup (1), pressure transducer (2) are connected 3 with temperature sensor) output terminal respectively the input end corresponding with data acquisition unit (4) connect; Be connected by connection is two-way between described data acquisition unit (4) and calculating and the display unit.
2. a kind of boiler feedwater flow proving installation according to claim 1 is characterized in that: the feedwater straight pipeline Upstream section length of described differential pressure pickup (1) 〉=30 times of feedwater straight pipeline diameters, its tract length 〉=10 times feedwater straight pipeline diameter.
3. a kind of boiler feedwater flow proving installation according to claim 1 and 2, it is characterized in that: the model of described data acquisition unit (4) is OM-DAQPRO-5300.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320207041 CN203259196U (en) | 2013-04-23 | 2013-04-23 | Testing device for flow of boiler feed water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320207041 CN203259196U (en) | 2013-04-23 | 2013-04-23 | Testing device for flow of boiler feed water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203259196U true CN203259196U (en) | 2013-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320207041 Expired - Fee Related CN203259196U (en) | 2013-04-23 | 2013-04-23 | Testing device for flow of boiler feed water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203259196U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091957A (en) * | 2015-05-27 | 2015-11-25 | 东南大学 | A thermal power generating unit feedwater flow measuring method |
-
2013
- 2013-04-23 CN CN 201320207041 patent/CN203259196U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091957A (en) * | 2015-05-27 | 2015-11-25 | 东南大学 | A thermal power generating unit feedwater flow measuring method |
| CN105091957B (en) * | 2015-05-27 | 2018-04-03 | 东南大学 | A kind of fired power generating unit feedwater flow assay method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20160423 |