CN215004095U - Steam leakage simulation test system for main steam pipeline of power plant - Google Patents
Steam leakage simulation test system for main steam pipeline of power plant Download PDFInfo
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- CN215004095U CN215004095U CN202121118661.6U CN202121118661U CN215004095U CN 215004095 U CN215004095 U CN 215004095U CN 202121118661 U CN202121118661 U CN 202121118661U CN 215004095 U CN215004095 U CN 215004095U
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Abstract
The utility model discloses a steam leakage simulation test system for a main steam pipeline of a power plant, which comprises an open loop, wherein the open loop comprises a deionized water tank, a plunger pump, a spiral pipe steam generator, a venturi flowmeter, a pressure vessel and a condenser which are connected by a plurality of pipelines; compared with the prior art, the mode that a spiral tube steam generator of a direct-current power supply is connected with a pressure container in series is used as a steam source, so that the device has the advantages of high temperature rise rate, stable pressure, stable steam flow and greatly increased adjustability, and the test efficiency is greatly improved; can require accurate adjustment power load according to the steam parameter, reduce rack running cost by a wide margin, realize the utility model discloses a purpose.
Description
Technical Field
The utility model relates to a thermal technology water conservancy experimental apparatus and test method, in particular to power plant main steam pipeline steam leakage analogue test system.
Background
The LBB (Leak Before Break) technology is an advanced design technology for ensuring the operation safety and reliability of a reactor, and the basic idea is that when a pipeline leaks, the leakage amount can be monitored by a special leakage monitoring system when the leakage amount reaches a certain degree.
The LBB technology is more and more widely applied, but no engineering practical application of LBB adopted by a main steam pipeline exists in China at present.
Therefore, a steam leakage simulation test system for a main steam pipeline of a power plant is particularly needed to solve the existing problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power plant main steam pipeline steam leakage analogue test system, not enough to prior art, possess the steam that produces the operating mode requirement, leak the environment background that the detection device performance provided simulation steam leakage for test steam.
The utility model provides a technical problem can adopt following technical scheme to realize:
a steam leakage simulation test system for a main steam pipeline of a power plant comprises an open loop, wherein the open loop comprises a deionized water tank, a plunger pump, a spiral pipe steam generator, a Venturi flowmeter, a pressure container and a condenser which are connected by adopting a plurality of pipelines;
the outlet of the deionized water tank is connected with the inlet of the plunger pump, the deionized water tank and the outlet of the plunger pump are connected with each other to form a first bypass, the deionized water tank and the outlet of the spiral tube steam generator are connected with each other to form a second bypass, the outlet of the pressure container is divided into a main path and a branch path, and the main path of the outlet of the pressure container is sequentially connected with a condenser and the deionized water tank; a branch of an outlet of the pressure container is sequentially connected with the valve group and the main steam pipeline through a Venturi flowmeter; the spiral tube steam generator adopts a direct current power supply to heat deionized water flowing through the spiral tube steam generator.
In an embodiment of the present invention, an electric control valve TF1 is disposed on a first bypass pipeline between the deionized water tank and the plunger pump, and an electric control valve TF2 is disposed on a second bypass pipeline between the deionized water tank and the plunger pump; an electric valve TF3 is arranged on a main path on the outlet side of the spiral tube steam generator; an electric valve TF4 is arranged between the outlet of the pressure container and the condenser; an electric valve TF5 is arranged at the rear end of the Venturi flowmeter on the branch of the outlet of the pressure container; the back end of the electric valve TF5 is provided with a valve group TF6, a valve group TF7, a valve group TF8, a valve group TF9 and a valve group TF10 which are connected in parallel.
In an embodiment of the present invention, the valve set TF6, the valve set TF7, the valve set TF8, the valve set TF9, the valve set TF10 and the connected pipelines respectively correspond to the simulated leakage points at different positions of the main steam pipeline.
In one embodiment of the present invention, the spiral tube steam generator uses a 304 stainless steel tube of DN20 wound with 20 layers at a radius of 500 mm.
In an embodiment of the present invention, the inlet and the outlet of the spiral tube steam generator are connected to the positive electrode and the negative electrode of the dc power supply, respectively.
In one embodiment of the present invention, the spiral tube steam generator is heated by applying direct current, and the heating power reaches 300 KW.
In an embodiment of the utility model, be provided with the temperature measurement point between the deionized water case with the plunger pump, be provided with the temperature measurement point on the pressure vessel, the temperature measurement point adopts armor K type thermocouple.
In an embodiment of the present invention, a pressure measuring point is provided between the plunger pump and the spiral tube steam generator, a pressure measuring point is provided on the pressure container, and the pressure measuring point adopts a pressure transmitter of the cross river EJA 530E.
In an embodiment of the present invention, a flow measuring point is disposed between the plunger pump and the spiral tube steam generator, a flow measuring point is disposed between the spiral tube steam generator and the pressure vessel, a flow measuring point is disposed between the pressure vessel and the valve set, and a venturi flow meter is employed as the flow measuring point.
In an embodiment of the present invention, the deionized water tank and the plunger pump are connected by a stainless steel 304 pipe.
Compared with the prior art, the steam leakage simulation test system for the main steam pipeline of the power plant adopts the mode that the spiral pipe steam generator of the direct-current power supply is connected with the pressure container in series as a steam source, has the advantages of large heating rate, stable pressure, stable steam flow and greatly increased adjustability, and greatly improves the test efficiency; can require accurate adjustment power load according to the steam parameter, reduce rack running cost by a wide margin, realize the utility model discloses a purpose.
The features of the present invention will be apparent from the accompanying drawings and from the detailed description of the preferred embodiments which follows.
Drawings
Fig. 1 is the structure schematic diagram of the steam leakage simulation test system of the main steam pipeline of the power plant of the utility model.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Examples
As shown in fig. 1, the steam leakage simulation test system for the main steam pipeline of the power plant of the present invention comprises an open loop, wherein the open loop comprises a deionized water tank 1, a plunger pump 2, a spiral pipe steam generator 4, a venturi flow meter, a pressure vessel 6 and a condenser 7 which are connected by a plurality of pipelines;
an outlet of the deionized water tank 1 is connected with an inlet of the plunger pump 2, outlets of the deionized water tank 1 and the plunger pump 2 are connected with each other to form a first bypass, an outlet of the deionized water tank 1 and an outlet of the spiral tube steam generator 4 are connected with each other to form a second bypass, an outlet of the pressure container 6 is divided into a main path and a branch path, and the main path of the outlet of the pressure container 6 is sequentially connected with the condenser 7 and the deionized water tank 1; the branch of the outlet of the pressure container 6 is connected with the valve group and the main steam pipeline 9 in sequence through a Venturi flowmeter; the spiral tube steam generator 4 uses a dc power supply to heat the deionized water flowing through it.
An electric control valve TF1 is arranged on a first bypass pipeline between the deionized water tank 1 and the plunger pump 2, and an electric control valve TF2 is arranged on a second bypass pipeline between the deionized water tank 1 and the plunger pump 2; an electric valve TF3 is arranged on a main path on the outlet side of the spiral tube steam generator 4; an electric valve TF4 is arranged between the outlet of the pressure container 6 and the condenser 7; an electric valve TF5 is arranged at the rear end of the Venturi flowmeter 8 on the branch of the outlet of the pressure container 6; the back end of the electric valve TF5 is provided with a valve group TF6, a valve group TF7, a valve group TF8, a valve group TF9 and a valve group TF10 which are connected in parallel.
The valve group TF6, the valve group TF7, the valve group TF8, the valve group TF9, the valve group TF10 and the pipelines connected with the valve group TF9 respectively correspond to simulated leakage points of different positions of the main steam pipeline 9.
The spiral tube steam generator 4 adopts a 304 stainless steel tube of DN20 and winds 20 layers with the radius of 500 mm; the inlet and the outlet of the spiral tube steam generator 4 are respectively connected with the anode and the cathode of a direct current power supply; the spiral-tube steam generator 4 is heated by means of direct current, and the heating power reaches 300 KW.
A temperature measuring point T1 is arranged between the deionized water tank 1 and the plunger pump 2, a temperature measuring point T2 is arranged on the pressure container 6, and the temperature measuring points T1 and T2 adopt armored K-type thermocouples.
A pressure measuring point P1 is arranged between the plunger pump 2 and the spiral tube steam generator 4, a pressure measuring point P2 is arranged on the pressure container 6, and a pressure transmitter of the river EJA530E is adopted as a pressure measuring point P1 and a pressure measuring point P2.
A flow measuring point is arranged between the plunger pump 2 and the spiral tube steam generator 4, and the flow measuring point adopts a Venturi flowmeter 3; a flow measuring point is arranged between the spiral tube steam generator 4 and the pressure container 6, and the flow measuring point adopts a Venturi flowmeter 5; and a flow measuring point is arranged between the pressure container 6 and the valve group, and the flow measuring point adopts a Venturi flowmeter 8.
The deionized water tank 1 and the plunger pump 2 are connected by a stainless steel 304 pipeline.
The utility model discloses a test method of power plant main steam pipeline steam leakage analogue test system, including following step:
before the experiment begins, the electric control valve TF2 on the second bypass is opened, and other valves are closed;
if the test is carried out, the plunger pump 2 is started, the opening degree of the electric regulating valve TF2 is slowly regulated, the whole open circuit is boosted to 2MPa, the direct-current power supply is started, the heating power of the spiral tube steam generator 4 is regulated through the power regulator, and the temperature measured by a temperature measuring point T2 at the outlet of the spiral tube steam generator 4 and the pressure measured by a pressure measuring point P1 at the plunger outlet are monitored; the pressure of the opening regulating loop of the electric regulating valve TF2 is continuously regulated to 8.66MPa, so that the pressure meets the working condition requirement; gradually increasing power to a heater of the spiral tube steam generator 4, gradually closing an electric control valve TF2 on a second bypass and simultaneously gradually opening an electric control valve TF3 after the temperature of a temperature measuring point T2 at the outlet of the spiral tube steam generator reaches 300.6 ℃ and the system pressure of a pressure measuring point P1 is monitored until the outlet of the spiral tube steam generator reaches a superheated steam state, and allowing superheated steam to enter a pressure container 6 through the electric control valve TF 3; monitoring a temperature measuring point T3 and a pressure measuring point P2, gradually opening an electric valve TF4 when the pressure in the pressure container reaches 1MPa, and keeping the temperature and the pressure in the pressure container stable by adjusting the opening degree of an electric valve TF4 after the temperature and the pressure in the pressure container rise to 300.6 ℃ and 8.66 MPa; then one of a valve group TF6, a valve group TF7, a valve group TF8, a valve group TF9 and a valve group TF10 is opened according to the working condition requirement, then the electric valve TF5 is slowly opened, the Venturi flowmeter 8 between the pressure container 6 and the valve group is monitored, the opening degree of the electric valve TF5 is continuously adjusted, the flow rate reaches 20kg/h required by the working condition, the steam injection working condition is realized, and the performance of the steam leakage detection device is tested.
The pressure range of the open loop is 0.1-20MPa, and the spiral tube steam generator heats the open loop to ensure that the maximum operating temperature of the open loop can reach 350 ℃.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (10)
1. A steam leakage simulation test system for a main steam pipeline of a power plant is characterized by comprising an open loop, wherein the open loop comprises a deionized water tank, a plunger pump, a spiral pipe steam generator, a Venturi flow meter, a pressure vessel and a condenser which are connected by adopting a plurality of pipelines;
the outlet of the deionized water tank is connected with the inlet of the plunger pump, the deionized water tank and the outlet of the plunger pump are connected with each other to form a first bypass, the deionized water tank and the outlet of the spiral tube steam generator are connected with each other to form a second bypass, the outlet of the pressure container is divided into a main path and a branch path, and the main path of the outlet of the pressure container is sequentially connected with a condenser and the deionized water tank; a branch of an outlet of the pressure container is sequentially connected with the valve group and the main steam pipeline through a Venturi flowmeter; the spiral tube steam generator adopts a direct current power supply to heat deionized water flowing through the spiral tube steam generator.
2. The power plant main steam pipeline steam leakage simulation test system of claim 1, wherein an electric control valve TF1 is arranged on a first bypass pipeline between the deionized water tank and the plunger pump, and an electric control valve TF2 is arranged on a second bypass pipeline between the deionized water tank and the plunger pump; an electric valve TF3 is arranged on a main path on the outlet side of the spiral tube steam generator; an electric valve TF4 is arranged between the outlet of the pressure container and the condenser; an electric valve TF5 is arranged at the rear end of the Venturi flowmeter on the branch of the outlet of the pressure container; the back end of the electric valve TF5 is provided with a valve group TF6, a valve group TF7, a valve group TF8, a valve group TF9 and a valve group TF10 which are connected in parallel.
3. The power plant main steam pipeline steam leakage simulation test system of claim 1, wherein the valve group TF6, the valve group TF7, the valve group TF8, the valve group TF9, the valve group TF10 and the pipelines connected with the valve group TF10 respectively correspond to simulated leakage points at different positions of the main steam pipeline.
4. The power plant main steam line steam leak simulation test system of claim 1, wherein the spiral tube steam generator employs DN20 304 stainless steel tubing wound in 20 layers with a radius of 500 mm.
5. The power plant main steam pipeline steam leak simulation test system of claim 1, wherein an inlet and an outlet of the spiral pipe steam generator are connected to a positive pole and a negative pole of a direct current power supply, respectively.
6. The power plant main steam line steam leak simulation test system of claim 1, wherein the spiral tube steam generator is heated by applying direct current with a heating power of up to 300 KW.
7. The power plant main steam pipeline steam leakage simulation test system of claim 1, wherein a temperature measuring point is arranged between the deionized water tank and the plunger pump, a temperature measuring point is arranged on the pressure vessel, and the temperature measuring point is an armored K-type thermocouple.
8. The power plant main steam pipeline steam leakage simulation test system of claim 1, wherein a pressure measuring point is arranged between the plunger pump and the spiral pipe steam generator, a pressure measuring point is arranged on the pressure vessel, and the pressure measuring point adopts a pressure transmitter of the cross river EJA 530E.
9. The power plant main steam pipeline steam leakage simulation test system according to claim 1, wherein a flow measurement point is arranged between the plunger pump and the spiral pipe steam generator, a flow measurement point is arranged between the spiral pipe steam generator and the pressure vessel, a flow measurement point is arranged between the pressure vessel and the valve set, and a venturi flowmeter is adopted as the flow measurement point.
10. The power plant main steam pipeline steam leakage simulation test system of claim 1, wherein the deionized water tank and the plunger pump are connected by a stainless steel 304 pipeline.
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| CN202121118661.6U CN215004095U (en) | 2021-05-24 | 2021-05-24 | Steam leakage simulation test system for main steam pipeline of power plant |
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| CN202121118661.6U CN215004095U (en) | 2021-05-24 | 2021-05-24 | Steam leakage simulation test system for main steam pipeline of power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389104A (en) * | 2021-05-24 | 2022-11-25 | 上海核能装备测试验证中心有限公司 | Steam leakage simulation test system and test method for main steam pipeline of power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389104A (en) * | 2021-05-24 | 2022-11-25 | 上海核能装备测试验证中心有限公司 | Steam leakage simulation test system and test method for main steam pipeline of power plant |
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