CN210322093U - Real-time supplementary checking device of heat supply unit heat supply network head station heat supply volume - Google Patents
Real-time supplementary checking device of heat supply unit heat supply network head station heat supply volume Download PDFInfo
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- CN210322093U CN210322093U CN201921142047.6U CN201921142047U CN210322093U CN 210322093 U CN210322093 U CN 210322093U CN 201921142047 U CN201921142047 U CN 201921142047U CN 210322093 U CN210322093 U CN 210322093U
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Abstract
The utility model discloses a real-time auxiliary checking device for heat supply amount of a heat supply unit heat supply network head station, which comprises a data measuring terminal, a data acquisition device and a data processing and display device; wherein the data measurement terminal includes: the steam inlet pressure transmitter and the steam inlet temperature transmitter are arranged on a steam inlet pipeline of the heat supply network heater, and the drainage pressure transmitter, the drainage temperature transmitter and the drainage flow differential pressure transmitter are arranged on a drainage pipeline of the heat supply network heater; the output end of the data acquisition device is connected to the data processing and displaying equipment through a data line. The utility model discloses simple structure, data easily measure, are convenient for implement, on the basis that reduces the check-up work load, further improve data analysis accuracy, provide the reference basis for the dispute that probably exists between power plant and the heating power company because of the production of heat supply deviation.
Description
Technical Field
The utility model relates to a thermal power plant heat supply unit detects technical field, especially a device is checked to heat supply unit heat supply network head station heat supply capacity.
Background
At the head station of a heat network of a heat supply unit of a thermal power plant, the accuracy of heat supply quantity measurement is a main reference index for evaluating the performance of the heat supply unit, and the heat supply unit is also an important component of trade settlement of the power plant. The pipe diameter of a water supply and return pipeline in a heat supply network initial station is mostly DN700 or DN1200, an ultrasonic flowmeter is mostly adopted as a flow measuring device, the flow of the ultrasonic flowmeter reaches about 7000 t/h-1200 t/h, and the ultrasonic flowmeter belongs to large pipe diameter and large flow.
For the measurement of the above-mentioned flow, the following problems mainly exist in the measurement process with the current measurement technology: firstly, the requirement on the installation position of a measuring element is strict, the universality requirement of the measuring element is that the length of a straight pipe section where the measuring position is located is long, and the length requirement of the straight pipe section can not be met on the site of a heat supply network head station of a thermal power plant due to the design and space utilization; secondly, on-site calibration is inconvenient, especially for some heat measuring systems installed on a common hot water pipeline, due to the fact that the on-site situation is complex, the influence factors are more, the heat measuring system cannot be disassembled, and a heat supply system usually does not reserve a standby measuring point in the construction process and cannot enter the heat supply system for measurement, so that calibration and tracing are difficult; thirdly, the heat supply network head station and the heating power company of the thermal power plant are respectively provided with a set of heat supply quantity measuring device, and when the two have larger deviation, trade settlement disputes are easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides a simple structure, convenient operation's heat supply network head station heat supply load assists the check device in real time, on the basis that reduces the check-up work load, further improves the data analysis accuracy.
In order to solve the technical problem, the utility model adopts the following technical proposal.
A heat supply unit heat supply network head station heat supply load real-time auxiliary check device comprises a data measurement terminal, a data acquisition device and data processing and display equipment;
the data measuring terminal comprises an admission pressure transmitter and an admission temperature transmitter which are arranged on an admission pipeline of the heat supply network heater, and a drainage pressure transmitter, a drainage temperature transmitter and a drainage flow differential pressure transmitter which are arranged on a drainage pipeline of the heat supply network heater; the output ends of the steam inlet pressure transmitter, the steam inlet temperature transmitter, the drainage pressure transmitter, the drainage temperature transmitter and the drainage flow differential pressure transmitter are respectively connected with the corresponding input ends of the data acquisition device through data lines;
the output end of the data acquisition device is connected with the data processing and displaying equipment through a data line.
The heat supply unit heat supply network primary station heat supply load real-time auxiliary checking device is characterized in that the data acquisition device is a distributed data acquisition board.
The data processing and displaying device is a PC machine.
Due to the adoption of the technical scheme, the utility model has the following technical progress.
The utility model has the advantages of simple structure, data easily measure, be convenient for implement, through measuring the hydrophobic pipeline flow of heat supply network heater, and combine the admission pressure of heat supply network heater, admission temperature, hydrophobic pressure, hydrophobic temperature isoparametric, carry out thermal calculation after acquireing thermal performance data, because the pipe diameter of hydrophobic pipeline generally is DN325, compare with heat supply network supply return water pipeline, belong to little pipe diameter low discharge, easily accurate measurement and check-up, on the basis that reduces check-up work load, further improve data analysis accuracy, thereby realize the real-time supervision of heat supply unit heat supply network head station in service heat supply load, provide the foundation to the calculation of heat supply network head station real-time heating load, provide the reference for the dispute that probably exists between power plant and the heating power company because of the heating load deviation production.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The system comprises a heat supply network heater drainage pipeline 1, a data acquisition board 2, a PC 3, a drainage temperature transmitter 4, a drainage pressure transmitter 5, an admission pressure transmitter 6, an admission temperature transmitter 7 and a drainage flow differential pressure transmitter 8.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The structure of the real-time auxiliary checking device for the heat supply capacity of the heat supply unit heat supply network head station is shown in figure 1, and the device comprises a data measuring terminal, a data acquisition device and data processing and displaying equipment.
The data measurement terminal comprises an admission pressure transmitter 6 and an admission temperature transmitter 7 which are arranged on an admission pipeline of the heat supply network heater, and a drainage pressure transmitter 5, a drainage temperature transmitter 4 and a drainage flow differential pressure transmitter 8 which are arranged on a drainage pipeline 1 of the heat supply network heater; the output ends of the steam inlet pressure transmitter, the steam inlet temperature transmitter, the drainage pressure transmitter, the drainage temperature transmitter and the drainage flow differential pressure transmitter are respectively connected with the corresponding input ends of the data acquisition device through data lines; the output end of the data acquisition device is connected with the data processing and displaying equipment through a data line. The utility model discloses in, data acquisition device is 35951B data acquisition board 2 for selling on the market to adopt distributed setting with the data acquisition board, data processing and display device are PC 3 for selling on the market.
In this embodiment, the checking device is applied to the heat supply unit heat supply network head station, the heating steam extraction amount is kept constant under a certain stable heat supply working condition, the drainage flow differential pressure value Δ p acquired by the data acquisition device is fed back to the data processing and display device, and the drainage flow of the heat supply network heater can be calculated.
The drainage flow of the heat supply network heater is obtained by adopting the formula I:
in the formula: d1-heat supply network heater drainage flow, t/h;
β -diameter ratio, β ═ D/D;
epsilon-coefficient of dielectric expansion, mm/mm.cndot.;
d is the orifice diameter of the throttling element, m;
rho-fluid density, kg/m3；
C-the efflux coefficient, see GB/T2624 standard;
Δ p — differential pressure before and after the orifice, Pa.
The heat supply load of the heat supply network heater is obtained by adopting the calculation of the formula II:
in the formula: q1-heating load of the heating network heater, GJ/h;
D1-heat supply network heater drainage flow, t/h;
h1-heating network heater inlet steam enthalpy, kJ/kg; from the formula h1＝fs(p1,t1) Calculated to obtain the function fsThe method is found from the related calculation formula of the International Association for water and water vapor characteristics; p in the formula1The admission pressure value, t, collected for the admission pressure transmitter1The steam inlet temperature value is collected by the steam inlet temperature transmitter;
h2-the hydrophobic enthalpy of the heater of the heating network, kJ/kg; from the formula h2＝fs(p2,t2) Calculated to obtain the function fsThe method is found from the related calculation formula of the International Association for water and water vapor characteristics; p in the formula2Hydrophobic pressure value, t, collected for a hydrophobic pressure transmitter2A hydrophobic temperature value collected for the hydrophobic temperature transmitter;
η -Heat efficiency of heating network heater,%, generally 98.
The heat supply load of the heat supply network initial station is obtained by adopting the following three calculation methods:
Qg＝Dg×(hg-hl) Formula III
In the formula: qg-heat supply from the network heater in GJ/h;
Dg-first station water supply flow of the heat supply network, unit t/h;
hgthe enthalpy value of water supply of the first station of the heat supply network is kJ/kg;
hlthe enthalpy value of return water at the first station of the heat supply network is kJ/kg.
The heat supply deviation rate of the heat supply network head station and the heat supply company is obtained by adopting the formula four:
and checking the heat supply amount according to the deviation ratio obtained by the formula IV. Under the normal operation condition of the heat supply system, the heat supply quantity Q of the heat supply network head stationgHeat supply quantity Q of heat supply network heater1Equal, i.e. the deviation ratio is 0.
Claims (3)
1. The utility model provides a heat supply unit heat supply network head station heat supply load assists verifying attachment in real time which characterized in that: the system comprises a data measuring terminal, a data acquisition device and data processing and displaying equipment;
the data measurement terminal comprises an admission pressure transmitter (6) and an admission temperature transmitter (7) which are arranged on an admission pipeline of the heat supply network heater, and a drainage pressure transmitter (5), a drainage temperature transmitter (4) and a drainage flow differential pressure transmitter (8) which are arranged on a drainage pipeline (1) of the heat supply network heater; the output ends of the steam inlet pressure transmitter, the steam inlet temperature transmitter, the drainage pressure transmitter, the drainage temperature transmitter and the drainage flow differential pressure transmitter are respectively connected with the corresponding input ends of the data acquisition device through data lines;
the output end of the data acquisition device is connected with the data processing and displaying equipment through a data line.
2. The heat supply unit heat supply network head station heat supply amount real-time auxiliary checking device according to claim 1, characterized in that: the data acquisition device is a distributed data acquisition board (2).
3. The heat supply unit heat supply network head station heat supply amount real-time auxiliary checking device according to claim 1, characterized in that: the data processing and displaying equipment is a PC (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921142047.6U CN210322093U (en) | 2019-07-19 | 2019-07-19 | Real-time supplementary checking device of heat supply unit heat supply network head station heat supply volume |
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| CN201921142047.6U CN210322093U (en) | 2019-07-19 | 2019-07-19 | Real-time supplementary checking device of heat supply unit heat supply network head station heat supply volume |
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Cited By (1)
| 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 |
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2019
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Cited By (1)
| 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 |
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Address after: 050000 2nd floor, Yingpan commercial and residential building, 129 Nanxiao street, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee after: Hebei Jiantou energy science and Technology Research Institute Co.,Ltd. Address before: 050000 2nd floor, Yingpan commercial and residential building, 129 Nanxiao street, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee before: HEBEI JI-YAN ENERGY SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |