CN113096838A - Device for discharging liquid metal in pipeline and quickly cooling pipeline - Google Patents
Device for discharging liquid metal in pipeline and quickly cooling pipeline Download PDFInfo
- Publication number
- CN113096838A CN113096838A CN202110541042.6A CN202110541042A CN113096838A CN 113096838 A CN113096838 A CN 113096838A CN 202110541042 A CN202110541042 A CN 202110541042A CN 113096838 A CN113096838 A CN 113096838A
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- Prior art keywords
- pipeline
- liquid metal
- outlet
- inlet
- communicated
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
- G21C15/14—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices from headers; from joints in ducts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/022—Air heaters with forced circulation using electric energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
- F24H9/2071—Arrangement or mounting of control or safety devices for air heaters using electrical energy supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- High Energy & Nuclear Physics (AREA)
Abstract
The invention discloses a device for discharging liquid metal in a pipeline and quickly cooling the pipeline.A liquid metal pipeline outlet is sequentially connected with an outlet isolation valve, a liquid metal storage tank, an air cooler, a fine filter and a circulating fan and communicated with an inlet of an electric heater; the outlet of the electric heater is divided into two paths, wherein one path is communicated with the inlet of the liquid metal pipeline through an inlet isolation valve, and the other path is communicated with the inlet of the air cooler through a recirculation valve. The outlet of the nitrogen tank is communicated with the inlet of the outlet pipeline through the pressure regulating valve, the outlet of the liquid metal storage tank is communicated with the inlet of the outlet pipeline, the outlet of the outlet pipeline is communicated with the inlet of the air cooler, and the device can run out of the liquid metal in the pipeline and simultaneously realize the rapid cooling of the pipeline.
Description
Technical Field
The invention belongs to the technical field of liquid metal discharging in pipelines and pipeline cooling, and relates to a device for discharging liquid metal in pipelines and quickly cooling the pipelines.
Background
The fourth generation of novel reactors usually use active metal (sodium, potassium or lithium) as a coolant, main equipment of the first and second loops are all in a liquid metal working environment, a pipeline which usually uses the liquid metal as a working medium is designed to have a certain gradient, and an electric heating wire is wound on the outer wall of the pipeline and used for heating the metal in the pipeline to prevent the liquid metal from being solidified. When equipment on a pipeline is replaced or overhauled, the liquid metal is automatically drained into a liquid metal storage tank by gravity, and the draining speed of the gravity-flow liquid metal is low; more liquid metal residues exist in the pipeline, so that equipment maintenance is not facilitated, and the residual sodium cleaning workload is increased; air may leak into the pipeline after the liquid metal is discharged, so that the quality of the liquid metal is reduced; the pipeline depends on natural cooling, and the cooling time is long.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a device for discharging liquid metal in a pipeline and quickly cooling the pipeline, which can be used for discharging the liquid metal in the pipeline and quickly cooling the pipeline.
In order to achieve the aim, the device for discharging the liquid metal in the pipeline and quickly cooling the pipeline comprises an outlet pipeline, a liquid metal storage tank, an air cooler, a fine filter, a circulating fan, an electric heater, an inlet isolation valve, a recirculation valve, a pressure regulating valve and a nitrogen tank;
the outlet of the liquid metal pipeline is sequentially connected with an outlet isolation valve, a liquid metal storage tank, an air cooler, a fine filter and a circulating fan which are communicated with the inlet of the electric heater;
the outlet of the electric heater is divided into two paths, wherein one path is communicated with the inlet of the liquid metal pipeline through an inlet isolation valve, and the other path is communicated with the inlet of the air cooler through a recirculation valve.
The outlet of the nitrogen tank is communicated with the inlet of the outlet pipeline through a pressure regulating valve, the outlet of the liquid metal storage tank is communicated with the inlet of the outlet pipeline, and the outlet of the outlet pipeline is communicated with the inlet of the air cooler.
An outlet isolation valve is arranged between the liquid metal pipeline and the liquid metal storage tank.
A molecular sieve bed is arranged between the air cooler and the fine filter.
The outlet of the electric heater is divided into two paths after passing through the flow sensor.
And a temperature sensor is arranged at the outlet of the electric heater, wherein the temperature sensor is locked with the electric heater.
And a pressure sensor is arranged on the outlet pipeline and is locked and connected with the pressure regulating valve.
The molecular sieve bed adsorbs gaseous impurities in the gas stream.
The fine filter filters solid contaminant particles from the gas stream.
The invention has the following beneficial effects:
when the device for discharging the liquid metal in the pipeline and quickly cooling the pipeline is in specific operation and liquid metal in the pipeline needs to be discharged, the circulating fan is used for driving high-temperature nitrogen heated by the electric heater to push and carry the liquid metal to flow into the liquid metal storage tank for storage; when the temperature needs to be reduced, the circulating fan is utilized to drive high-temperature gas in the liquid metal pipeline to flow through the air cooler for closed-type circulating temperature reduction, so that the pipeline is quickly cooled, the temperature reduction time is shortened, and the equipment is convenient to overhaul; the nitrogen in the pipeline is also used as protective gas to prevent air from leaking in and ensure the quality of the liquid metal.
Furthermore, the temperature reduction speed of the recirculation valve is controlled, the temperature sensor and the electric heater control the temperature of the nitrogen, impurities in the nitrogen are removed through the molecular sieve bed and the fine filter, the nitrogen in the system is provided by the nitrogen tank, and the pressure of the nitrogen is controlled by the pressure regulating valve according to the pressure sensor.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a liquid metal pipeline, 2 is an outlet isolation valve, 3 is a liquid metal storage tank, 4 is a pressure sensor, 5 is an air cooler, 6 is a molecular sieve bed, 7 is a fine filter, 8 is a circulating fan, 9 is an electric heater, 10 is a temperature sensor, 11 is a flow sensor, 12 is an inlet isolation valve, 13 is a recirculation valve, 14 is a pressure regulating valve, and 15 is a nitrogen tank.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the device for discharging liquid metal in a pipeline and rapidly cooling the temperature of the pipeline according to the present invention includes a liquid metal pipeline 1, an outlet isolation valve 2, a liquid metal storage tank 3, a pressure sensor 4, an air cooler 5, a molecular sieve bed 6, a fine filter 7, a circulating fan 8, an electric heater 9, a temperature sensor 10, a flow sensor 11, an inlet isolation valve 12, a recirculation valve 13, a pressure regulating valve 14, and a nitrogen tank 15; an outlet of the liquid metal pipeline 1 is sequentially connected with an outlet isolation valve 2, a liquid metal storage tank 3, an outlet pipeline, an air cooler 5, a molecular sieve bed 6, a fine filter 7, a circulating fan 8 and an electric heater 9 and communicated with an inlet of a flow sensor 11; the outlet of the flow sensor 11 is divided into two paths, wherein one path is communicated with the inlet of the liquid metal pipeline 1 through an inlet isolation valve 12, and the other path is communicated with the inlet of the air cooler 5 through a recirculation valve 13.
The outlet of the nitrogen tank 15 is connected to the inlet of the outlet pipe via the pressure regulating valve 14, the outlet of the liquid metal storage tank 3 is connected to the inlet of the outlet pipe, and the outlet of the outlet pipe is connected to the inlet of the air cooler 5.
The molecular sieve bed 6 is used for adsorbing gas impurities in the gas flow, and the fine filter 7 is used for filtering solid impurity particles in the gas flow.
The outlet pipeline is provided with a pressure sensor 4, the pressure sensor 4 is locked with a pressure regulating valve 14, and the pressure of nitrogen in the system is ensured to be 0.1-0.2 MPa.
A temperature sensor 10 is arranged at the outlet of the electric heater 9, and the temperature sensor 10 is locked with the electric heater, so that the temperature of the circulating nitrogen at the outlet of the electric heater 9 is 40-200 ℃.
When the air cooler 5 is put into operation, the flow rate of the cooling nitrogen flowing through the liquid metal pipeline 1 can be controlled by adjusting the opening degree of the recirculation valve 13, so that the controllable temperature reduction of the liquid metal pipeline 1 is ensured.
The specific working process of the invention is as follows:
1) closing the outlet isolation valve 2 and the inlet isolation valve 12, without putting the air cooler 5 in;
2) opening the pressure regulating valve 14, and introducing nitrogen output by the nitrogen tank 15 into the air cooler 5;
3) the opening degree of the pressure regulating valve 14 is regulated according to a pressure signal detected by the pressure sensor 4, so that the nitrogen pressure at the outlet of the pressure regulating valve 14 is 0.1-0.2 MPa;
4) opening the recirculation valve 13 and starting the circulating fan 8;
5) controlling the electric heater 9 according to the temperature of the nitrogen detected by the temperature sensor 10, so that the temperature of the nitrogen detected by the temperature sensor 10 is 190-200 ℃;
6) opening an outlet isolation valve 2 and an inlet isolation valve 12, and adjusting the opening degree of a recirculation valve 13 to 20%;
7) after the liquid level of the liquid metal storage tank 3 does not rise any more, closing the recirculation valve 13, operating the circulating fan 8 for 20min to ensure that the liquid metal is completely discharged, and then closing the electric heater 9;
8) opening a recirculation valve 13, and putting an air cooler 5 into the system to ensure that the temperature difference between the temperature of the introduced cooling nitrogen and the liquid metal pipeline 1 is not more than 50 ℃;
the opening degree of the recirculation valve 13 is adjusted, the flow rate of the cooling nitrogen flowing through the liquid metal pipeline 1 is controlled, the cooling speed of the liquid metal pipeline 1 is controlled not to exceed 60 ℃/h, and finally the temperature of the liquid metal pipeline 1 is reduced to be close to the room temperature, so that the pipeline equipment is convenient to overhaul.
Claims (8)
1. A device for discharging liquid metal in a pipeline and quickly cooling the pipeline is characterized by comprising an outlet pipeline, a liquid metal pipeline (1), a liquid metal storage tank (3), an air cooler (5), a fine filter (7), a circulating fan (8), an electric heater (9), an inlet isolation valve (12), a recirculation valve (13), a pressure regulating valve (14) and a nitrogen tank (15);
an outlet of the liquid metal pipeline (1) is sequentially connected with an outlet isolation valve (2), a liquid metal storage tank (3), an air cooler (5), a fine filter (7) and a circulating fan (8) and communicated with an inlet of an electric heater (9);
the outlet of the electric heater (9) is divided into two paths, wherein one path is communicated with the inlet of the liquid metal pipeline (1) through an inlet isolation valve (12), and the other path is communicated with the inlet of the air cooler (5) through a recirculation valve (13);
the outlet of the nitrogen tank (15) is communicated with the inlet of the outlet pipeline through a pressure regulating valve (14), the outlet of the liquid metal storage tank (3) is communicated with the inlet of the outlet pipeline, and the outlet of the outlet pipeline is communicated with the inlet of the air cooler (5).
2. The device for discharging liquid metal from a pipeline and rapidly cooling the pipeline as claimed in claim 1, wherein an outlet isolation valve (2) is arranged between the liquid metal pipeline (1) and the liquid metal storage tank (3).
3. The liquid metal discharging and pipeline cooling device in claim 1, wherein a molecular sieve bed (6) is arranged between the air cooler (5) and the fine filter (7).
4. The device for discharging liquid metal in a pipeline and rapidly cooling the pipeline as claimed in claim 1, wherein an outlet of the electric heater (9) is divided into two paths after passing through the flow sensor (11).
5. The liquid metal discharging and pipeline rapid cooling device in claim 1, characterized in that a temperature sensor (10) is arranged at the outlet of the electric heater (9), wherein the temperature sensor (10) is locked with the electric heater (9).
6. The device for discharging liquid metal in a pipeline and rapidly cooling the pipeline as claimed in claim 1, wherein the outlet pipeline is provided with a pressure sensor (4), and the pressure sensor (4) is locked with the pressure regulating valve (14).
7. The apparatus for discharging liquid metal from a pipeline and rapidly cooling the pipeline as claimed in claim 3, wherein the molecular sieve bed (6) adsorbs gaseous impurities in the gas flow.
8. The liquid metal discharging and pipeline cooling device in claim 1, wherein the fine filter (7) filters solid foreign particles in the gas flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110541042.6A CN113096838A (en) | 2021-05-18 | 2021-05-18 | Device for discharging liquid metal in pipeline and quickly cooling pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110541042.6A CN113096838A (en) | 2021-05-18 | 2021-05-18 | Device for discharging liquid metal in pipeline and quickly cooling pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113096838A true CN113096838A (en) | 2021-07-09 |
Family
ID=76665816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110541042.6A Pending CN113096838A (en) | 2021-05-18 | 2021-05-18 | Device for discharging liquid metal in pipeline and quickly cooling pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113096838A (en) |
-
2021
- 2021-05-18 CN CN202110541042.6A patent/CN113096838A/en active Pending
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