CN216559112U - System for high temperature gas cooled reactor helium flow is markd - Google Patents
System for high temperature gas cooled reactor helium flow is markd Download PDFInfo
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- CN216559112U CN216559112U CN202220101667.0U CN202220101667U CN216559112U CN 216559112 U CN216559112 U CN 216559112U CN 202220101667 U CN202220101667 U CN 202220101667U CN 216559112 U CN216559112 U CN 216559112U
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Abstract
The utility model discloses a high-temperature gas cooled reactor helium flow calibration system which comprises an evaporator, a primary circuit outlet measuring point of the evaporator, a helium circulator, a primary circuit reactor system, an evaporator primary circuit inlet measuring point and the like. The temperature and pressure measuring points used by the utility model can be checked off line; the measuring point of the water supply flow of the second loop can be accurately calibrated on line; in the checking process, a loop is not required to be additionally provided with a measuring point, so that the implementation is simple; the checking process can be carried out in a loop heating and dehumidifying stage without occupying an additional window.
Description
Technical Field
The utility model belongs to the technical field of electric power, and particularly relates to a system for calibrating helium flow of a high-temperature gas cooled reactor.
Background
The air quantity is an important parameter of the fan, and the accuracy of the air quantity is related to the pipeline characteristics besides the air quantity measuring device. Generally, after a fan, an air quantity measuring point and an air pipeline are installed, another measuring point is installed on the air pipeline, the on-line air quantity measuring device is calibrated by using a calibrated air quantity measuring instrument, and the on-line air quantity measuring device can accurately measure the air quantity to participate in the control of a unit.
A main helium fan of a high-temperature gas-cooled reactor nuclear power plant is core equipment of the high-temperature gas-cooled reactor nuclear power plant, helium flow is an important parameter for controlling the high-temperature gas-cooled reactor nuclear power plant, but the helium flow cannot be calibrated on line by installing a measuring point on a primary helium flow pipeline like the air quantity of a thermal power generating unit.
SUMMERY OF THE UTILITY MODEL
The utility model provides a system for calibrating the helium flow of a high-temperature gas-cooled reactor, aiming at the problem that the helium flow device of the high-temperature gas-cooled reactor cannot be calibrated on line.
In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:
a system for calibrating helium flow of a high-temperature gas cooled reactor comprises an evaporator, a primary loop outlet measuring point of the evaporator, a helium circulator, a primary loop reactor system and a primary loop inlet measuring point of the evaporator; wherein the content of the first and second substances,
the first outlet of the evaporator is connected with the inlet of a primary loop outlet measuring point of the evaporator, the outlet of the primary loop outlet measuring point of the evaporator is connected with the inlet of the helium circulator, the outlet of the helium circulator is connected with the inlet of a primary loop reactor system, and the outlet of the primary loop reactor system is connected with the first inlet of the evaporator.
The utility model has the further improvement that the device also comprises a measuring point of an outlet of a second loop of the evaporator, a steam system of the second loop and a measuring point of an inlet of the second loop of the evaporator; wherein the content of the first and second substances,
the second outlet of the evaporator is connected with the inlet of the outlet measuring point of the second loop of the evaporator, the outlet of the outlet measuring point of the second loop of the evaporator is connected with the inlet of the steam-water system of the second loop, the outlet of the steam-water system of the second loop is connected with the inlet of the inlet measuring point of the second loop of the evaporator, and the outlet of the inlet measuring point of the second loop of the evaporator is connected with the second inlet of the evaporator.
The utility model is further improved in that the evaporator is a shell-and-tube type direct-flow evaporator, the two-loop water vapor flows through the tubes of the evaporator, and the one-loop helium gas flows through the tubes of the evaporator.
The utility model is further improved in that the primary reactor system is a helium-cooled pebble-bed reactor system, the helium flows through the reactor core and absorbs the heat of the reactor core, the reactor core is cooled, and the helium is heated.
The utility model is further improved in that a measuring point at the outlet of the primary loop of the evaporator comprises a measuring point capable of measuring the temperature, the pressure and the flow of helium at the outlet of the primary loop of the evaporator.
The utility model is further improved in that a measuring point at the inlet of the primary loop of the evaporator comprises a measuring point capable of measuring the temperature and the pressure of helium at the inlet of the primary loop of the evaporator.
The utility model is further improved in that the measuring point of the inlet of the second loop of the evaporator comprises measuring points capable of measuring the temperature, the pressure and the flow of the feed water at the inlet of the second loop of the evaporator.
The utility model has the further improvement that the measuring point of the outlet of the second loop of the evaporator comprises a measuring point which can measure the temperature and the pressure of the working medium at the outlet of the second loop of the evaporator.
Compared with the prior art, the utility model has the following advantages:
compared with the system commonly used at present, the system for calibrating the helium flow of the high-temperature gas cooled reactor has the following obvious advantages:
1. the problem that the current helium flow cannot be checked is solved;
2. the temperature and pressure measuring points used by the utility model can be checked off line;
3. the measuring point of the water supply flow of the second loop can be accurately calibrated on line;
4. in the checking process, a loop is not required to be additionally provided with a measuring point, so that the implementation is simple;
5. the checking process can be carried out in a loop heating and dehumidifying stage without occupying an additional window.
Drawings
Fig. 1 is a block diagram of a system for calibrating helium flow of a high temperature gas cooled reactor according to the present invention.
Description of reference numerals:
1. a loop outlet measuring point of the evaporator;
2. a helium main blower;
3. a primary loop reactor system;
4. a loop inlet measuring point of the evaporator;
5. a measuring point of a loop inlet of the evaporator II;
6. measuring a point at the outlet of the second loop of the evaporator;
7. a two-circuit steam system;
8. an evaporator.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1, the system for calibrating the helium flow rate of the high-temperature gas-cooled reactor provided by the utility model comprises an evaporator 8, an evaporator primary loop outlet measuring point 1, a helium circulator 2, a primary loop reactor system 3, an evaporator primary loop inlet measuring point 4, an evaporator secondary loop outlet measuring point 6, a secondary loop steam-water system 7 and an evaporator secondary loop inlet measuring point 5.
A first outlet of the evaporator 8 is connected with an inlet of a primary loop outlet measuring point 1 of the evaporator, an outlet of the primary loop outlet measuring point 1 of the evaporator is connected with an inlet of the helium circulator 2, an outlet of the helium circulator 2 is connected with an inlet of a primary loop reactor system 3, and an outlet of the primary loop reactor system 3 is connected with a first inlet of the evaporator 8; a second outlet of the evaporator 8 is connected with an inlet of a second loop outlet measuring point 6 of the evaporator, an outlet of the second loop outlet measuring point 6 of the evaporator is connected with an inlet of a second loop steam-water system 7, an outlet of the second loop steam-water system 7 is connected with an inlet of a second loop inlet measuring point 5 of the evaporator, and an outlet of the second loop inlet measuring point 5 of the evaporator is connected with a second inlet of the evaporator 8.
The evaporator 8 is a tube-shell type direct-flow evaporator, two-loop water vapor flows through the inside of the tube of the evaporator 8, and one-loop helium flows through the outside of the tube of the evaporator 8.
The primary loop reactor system 3 is a helium-cooled pebble-bed reactor system, and the helium flows through the reactor core to absorb the heat of the reactor core, so that the reactor core is cooled and heated.
The measuring point 1 of the primary loop outlet of the evaporator comprises a measuring point capable of measuring the temperature, the pressure and the flow of helium at the primary loop outlet of the evaporator.
The measuring point 4 of the primary loop inlet of the evaporator comprises a measuring point capable of measuring the temperature and the pressure of helium at the primary loop inlet of the evaporator.
The second evaporator loop inlet measuring point 5 comprises measuring points capable of measuring the temperature, pressure and flow of the feed water at the second evaporator loop inlet.
And the second-loop outlet measuring point 6 of the evaporator comprises a measuring point capable of measuring the temperature and the pressure of the working medium at the second-loop outlet of the evaporator.
The utility model provides a system for calibrating the helium flow of a high-temperature gas cooled reactor, which comprises the following steps of:
1) calibrating pressure and temperature measuring points in a primary loop outlet measuring point 1 of the evaporator, a primary loop inlet measuring point 4 of the evaporator, a secondary loop outlet measuring point 6 of the evaporator and a secondary loop inlet measuring point 5 of the evaporator;
2) calibrating a feed water flow measuring point in a secondary loop inlet measuring point 5 of the evaporator, and setting the flow measuring point in a primary loop outlet measuring point 1 of the evaporator according to design;
3) filling helium into a primary loop, wherein the helium pressure is 25% of the rated pressure, starting the primary helium fan 2, establishing stable helium flow circulation of the primary loop, and adjusting the rotating speed of the primary helium fan 2 to enable the helium flow to reach 25% of the rated flow;
4) operating a secondary loop steam-water system 7, establishing a secondary loop stable water circulation, and adjusting the flow of the secondary loop water circulation to be 20% of the rated flow, the pressure to be 8MPa and the temperature to be 105 ℃;
5) recording the temperature, pressure and flow of the inlet and outlet of the first loop and the second loop after the temperature, pressure and flow of the inlet and outlet of the first loop and the second loop are stable, wherein the flow of helium in the first loop is recorded as gy, and the enthalpy difference H2 of the inlet and outlet of the second loop of the evaporator 8 is calculated;
6) inquiring the helium ratio enthalpy difference H1 at the primary circuit inlet and outlet according to the helium temperature and pressure at the primary circuit inlet and outlet of the evaporator 8, and then obtaining a measured value gc of the helium flow as H1/H1;
7) calculating a loop helium flow coefficient k11 ═ gc/gy;
8) for improving the accuracy, repeating 6), 7) and 8) every 30 minutes, measuring four times to respectively obtain four coefficients, namely k11, k12, k13 and k14, and calculating the average value of the four coefficients to be k 1;
9) adjusting the rotating speed of the main helium fan 2, enabling the helium flow to reach 50%, 75% and 100% of the rated flow, repeating the steps from 4) to 9), and calculating to obtain k2, k3 and k 4;
10) and calculating the average value k of k1, k2, k3 and k4, wherein the value is the calibration coefficient of the loop helium flow.
Examples
In the heating and dehumidifying process of the high-temperature gas cooled reactor demonstration project, the following data are collected:
the outlet temperature, pressure and flow of the second loop are respectively as follows: at 162.8 ℃, 6.51MPa and 24.69kg/s, and the specific enthalpy value is 690.38 kj/kg; the inlet temperature, pressure and flow rate of the two loops are respectively 166.1 ℃, 6.62MPa and 24.69kg/s specific enthalpy value 704.66.
Primary loop outlet temperature, pressure: 160.2 ℃, 5.55MPa of pressure and 2272.82kg/s of specific enthalpy value; the temperature and pressure of the inlet of a primary circuit are respectively 156.4 ℃, 5.62Mpa, and the flow of the primary circuit is 65.1 kg/s: the specific enthalpy value is 2269.36.
The calculated loop flow calibration factor was 0.97.
Although the utility model has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.
Claims (8)
1. A helium flow calibration system for a high-temperature gas cooled reactor is characterized by comprising an evaporator (8), an evaporator primary loop outlet measuring point (1), a helium main fan (2), a primary loop reactor system (3) and an evaporator primary loop inlet measuring point (4); wherein the content of the first and second substances,
the first outlet of the evaporator (8) is connected with the inlet of a primary loop outlet measuring point (1) of the evaporator, the outlet of the primary loop outlet measuring point (1) of the evaporator is connected with the inlet of the helium circulator (2), the outlet of the helium circulator (2) is connected with the inlet of a primary loop reactor system (3), and the outlet of the primary loop reactor system (3) is connected with the first inlet of the evaporator (8).
2. The system for calibrating the helium flow rate of the high temperature gas cooled reactor according to claim 1, further comprising an outlet measuring point (6) of the second loop of the evaporator, a steam-water system (7) of the second loop of the evaporator and an inlet measuring point (5) of the second loop of the evaporator; wherein the content of the first and second substances,
a second outlet of the evaporator (8) is connected with an inlet of a second loop outlet measuring point (6) of the evaporator, an outlet of the second loop outlet measuring point (6) of the evaporator is connected with an inlet of a second loop steam-water system (7), an outlet of the second loop steam-water system (7) is connected with an inlet of a second loop inlet measuring point (5) of the evaporator, and an outlet of the second loop inlet measuring point (5) of the evaporator is connected with a second inlet of the evaporator (8).
3. The system for calibrating the helium flow of the high-temperature gas-cooled reactor according to claim 2, wherein the evaporator (8) is a tube-shell type direct-current evaporator, the two-loop water vapor flows through the tubes of the evaporator (8), and the one-loop helium gas flows through the tubes of the evaporator (8).
4. The system for calibrating the helium flow of the high temperature gas cooled reactor as claimed in claim 2, wherein the primary reactor system (3) is a helium cooled pebble bed reactor system, the helium flows through the core to absorb the heat of the core, the core is cooled, and the helium is heated.
5. The system for calibrating the helium flow of the high-temperature gas-cooled reactor according to claim 2, wherein the point (1) at the outlet of the primary loop of the evaporator comprises a point capable of measuring the temperature, the pressure and the flow of helium at the outlet of the primary loop of the evaporator.
6. The system for calibrating the helium flow of the high-temperature gas-cooled reactor according to claim 2, wherein the point (4) at the inlet of the primary loop of the evaporator comprises a point capable of measuring the temperature and the pressure of helium at the inlet of the primary loop of the evaporator.
7. The system for calibrating the helium flow of the high temperature gas cooled reactor according to claim 2, wherein the point (5) for measuring the inlet of the second loop of the evaporator comprises a point capable of measuring the temperature, the pressure and the flow of feed water at the inlet of the second loop of the evaporator.
8. The system for calibrating the helium flow of the high temperature gas cooled reactor according to claim 2, wherein the outlet measuring point (6) of the second loop of the evaporator comprises a measuring point capable of measuring the temperature and the pressure of the working medium at the outlet of the second loop of the evaporator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220101667.0U CN216559112U (en) | 2022-01-14 | 2022-01-14 | System for high temperature gas cooled reactor helium flow is markd |
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| CN202220101667.0U CN216559112U (en) | 2022-01-14 | 2022-01-14 | System for high temperature gas cooled reactor helium flow is markd |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353883A (en) * | 2022-01-14 | 2022-04-15 | 西安热工研究院有限公司 | System and method for calibrating helium flow of high-temperature gas cooled reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353883A (en) * | 2022-01-14 | 2022-04-15 | 西安热工研究院有限公司 | System and method for calibrating helium flow of high-temperature gas cooled reactor |
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