CN115451646A - Drainage drying system of cooling system or equipment - Google Patents

Abstract

A cooling system or equipment drainage drying system disclosed in the present invention is used for the cooling system or equipment of the target station, which includes a medium self-discharging system, a normal temperature nitrogen purging system, and a high temperature nitrogen purging system respectively connected to the cooling system and vacuum drying system. The present invention solves the problem that the cooling system in the prior art will encounter the problem of draining and drying during operation, maintenance and other emergency maintenance by installing a drain valve and a storage tank under the cooling system, so as to ensure the avoidance of radioactive gases Diffusion to the workplace prevents workers from internal radiation and workplace pollution, and also ensures the concentration of the coolant and the purity of the nitrogen gas at start-up.

Description

A drainage and drying system for a cooling system or equipment

technical field

The invention relates to the technical field of target station cooling for spallation neutron sources, in particular to a cooling system or equipment drainage drying system for a target station water cooling system.

Background technique

In the water cooling system of the target station of the spallation neutron source, the working environment or the cooling medium used usually have certain radioactivity, and the cooling system needs to be pumped during operation, inspection and other emergency maintenance. Vacuum, the purpose is to avoid the spread of radioactive medium or gas to the workplace, causing the staff to be exposed to internal radiation and workplace pollution, and to ensure the concentration of the coolant and the purity of the nitrogen gas at start-up, so the cooling system must be reduced as much as possible before each maintenance The residual amount of cooling medium inside. However, the cooling medium in the current cooling system is disposable, and it will be disposed of directly after emission reduction, which will pollute the environment and reduce the recycling rate of the cooling medium; and, simply use the cooling medium in the cooling system To discharge the cooling medium by its own gravity, there must still be cooling medium on the wall of the cooling system; for the cooling medium remaining on the wall, usually use inert gas at normal temperature to purge the cooling medium still remaining on the wall in the cooling system However, due to the different diameters of the pipes in the cooling system or equipment, there are differences. The use of inert gas at room temperature has no obvious effect on purging and drainage of small pipe diameters, resulting in the cooling medium with stronger adhesion remaining on the wall of the cooling pipe. In the prior art, although high-temperature inert gas is used to purge the cooling pipe wall, there is still a cooling medium with stronger adhesion, which can solve the above technical problems. However, in actual operation, it is found that there are still residual The cooling medium has a high boiling point and is difficult to vaporize. Therefore, it is a severe test for whether the radioactive cooling medium in the cooling system, equipment, and pipelines is completely emptied. It is related to the physical and mental health of the staff and the purity of the newly added cooling medium.

Contents of the invention

Aiming at one or more problems in the prior art, the present invention proposes a cooling system or a drain drying system for equipment, aiming to solve the technical problems raised in the above-mentioned background technology.

In one aspect of the present invention, a drainage and drying system of a cooling system or equipment is proposed to act on the cooling system or equipment of a target station.

In another aspect of the present invention, a cooling system or a drainage drying system for equipment proposed includes: a medium self-discharging system connected to the cooling system, a normal temperature nitrogen purging system, a high temperature nitrogen purging system and a vacuum drying system .

Further, the cooling system has cooling system pipes through which the cooling medium circulates, and the self-discharging system of the medium includes a drain valve installed on the cooling system pipes and a storage tank arranged at the end of the cooling system pipes.

Further, the storage tank is installed below the cooling system pipeline.

Further, the normal temperature nitrogen purging system includes a nitrogen supply device, a front-end heater and a buffer tank for stabilizing the air pressure, and the buffer tank and the nitrogen supply device are connected through a nitrogen transmission pipeline, and the nitrogen transmission pipeline is installed There is a front-end heater, and the buffer tank is communicated with the cooling system through pipelines.

Further, the nitrogen supply device includes at least one nitrogen cylinder group, a liquid nitrogen pump, a pressure reducing valve and a protective layer.

Further, the high-temperature nitrogen purging system includes a back-end heater, and the back-end heater is installed on the pipeline between the buffer tank and the cooling system.

Further, the storage tank is communicated with a condenser.

Further, an exhaust dew point meter is installed at the inlet of the drain pipe of the storage tank.

Further, the vacuum drying system includes a vacuum pump and a gas capture cold trap device, the gas capture cold trap device is connected to the cooling system and the vacuum pump by a vacuum hose, and the gas capture cold trap device is connected to the cooling system A condensing inlet dew point meter is arranged between them.

Further, the gas capture cold trap device includes a condensation shell and a liquid nitrogen tank assembly, the liquid nitrogen tank assembly is installed in the condensation shell, and a condensation inlet and a condensation outlet are arranged on the upper part of the condensation shell.

Further, the condensation inlet is connected to the cooling system through a vacuum hose, and the condensation outlet pipe is connected to the vacuum pump through a vacuum hose.

Further, the bottom of the condensing shell is provided with a drain port.

Further, the condensate inlet dew point meter is installed at the condensate inlet of the gas capture cold trap equipment.

Further, the condensation outlet of the gas capture cold trap equipment is provided with a condensate dew point meter.

A cooling system or a drainage drying system for equipment provided by the present invention has the following beneficial effects:

1. The self-discharging system of the medium of the present invention, by installing a drain valve and a storage tank under the cooling system, solves the problem of draining and drying of the cooling system in the prior art during operation, maintenance and other emergency situations. In order to ensure that the radioactive gas will not spread to the workplace, avoid the staff from being exposed to internal radiation and workplace pollution, and also ensure the concentration of the cooling medium and the purity of the nitrogen gas at start-up;

2. The room temperature nitrogen purging system of the present invention is provided with a nitrogen supply device, a front-end heater and a buffer tank at the front end of the cooling system, thereby solving the problem that the existing cooling system simply uses the gravity of the cooling medium itself to discharge, so that the cooling There must still be cooling medium on the wall of the system, so that the remaining cooling medium on the wall of the cooling system is blown off by nitrogen at room temperature, and is drained to the storage tank by the drain pipe, so as to further reduce the discharge of cooling medium in the cooling system the purpose of content;

3. The high-temperature nitrogen purging system of the present invention is equipped with a rear-end heater on the basis of the normal-temperature nitrogen purging system, so that the normal-temperature nitrogen is heated to 40-50°C, and the remaining on the cooling pipe wall is realized. The cooling medium is vaporized, and the hot nitrogen gas carries the gaseous cooling medium and is discharged into the storage tank for recovery, which solves the problem that due to the different diameters and differences in the pipes in the cooling system or equipment, the use of nitrogen at room temperature has no obvious effect on purging and drainage of small pipe diameters , leading to the problem that there is still a cooling medium with stronger adhesion on the wall of the cooling pipe;

4. In the vacuum drying system of the present invention, a gas capture cold trap device and a vacuum pump are arranged at the end of the cooling system pipeline, and the heat nitrogen and gaseous cooling medium still remaining on the cooling system pipeline wall are vacuumized and depressurized. And the cooling medium with a high boiling point that is difficult to vaporize is extracted, which solves the problem that there is still a cooling medium with a high boiling point that is difficult to vaporize on the wall of the cooling system pipeline, and also solves the problem that there are other gaseous media in the cooling system pipeline;

5. The gas capture cold trap equipment of the present invention has the function of condensing the cooling medium and reclaiming it. The condensing inlet dew point meter provided can be used to determine the cooling system, equipment, cooling medium retention in the pipeline and the flow rate of the introduced hot nitrogen. The set condensate outlet dew point instrument has the function of being able to capture the gaseous cooling medium in a timely and efficient manner, which is used to ensure that there is no gaseous cooling medium at the condensing outlet, so that only nitrogen is extracted from the condensing outlet.

Description of drawings

In order to better understand the present invention, embodiments of the present invention will be described according to the following drawings:

Fig. 1 is the flow chart of the drainage drying system of cooling system or equipment in the embodiment of the present invention;

Fig. 2 is the flowchart of the self-discharging system of the medium in the embodiment of the present invention;

Fig. 3 is the flowchart of the normal temperature nitrogen purge system in the embodiment of the present invention;

Fig. 4 is the flowchart of the high temperature nitrogen purge system in the embodiment of the present invention;

Fig. 5 is the flowchart of the vacuum drying system in the embodiment of the present invention;

Fig. 6 is a schematic diagram of the front view of the gas capture cold trap equipment in the vacuum drying system,

Fig. 7 is the perspective structure schematic diagram of place A-A in Fig. 6;

Fig. 8 is a schematic diagram of the three-dimensional structure of the liquid nitrogen tank assembly in the gas capture cold trap equipment;

Wherein, each reference sign in the figure:

1-Check valve, 2-Drain valve, 3-Exhaust dew point meter, 4-Condensation inlet dew point meter, 5-Condensation outlet dew point meter;

10-Gas capture cold trap equipment;

11-condensation shell, 111-condensation inlet, 112-condensation outlet, 113-drainage port;

12-liquid nitrogen tank assembly, 121-flange, 122-hollow cavity, 123-liquid nitrogen inlet, 124-nitrogen outlet, 125-installation cover.

detailed description

Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described here are only for illustration, not for limiting the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the present invention. In other instances, well-known circuits, materials or methods have not been described in detail in order to avoid obscuring the present invention.

Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present invention. In at least one embodiment. Thus, appearances of the phrases "in one embodiment," "in an embodiment," "an example," or "example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, particular features, structures or characteristics may be combined in any suitable combination and/or subcombination in one or more embodiments or examples. Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale. It will be understood that when an element is referred to as being "coupled" or "connected" to another element, it can be directly coupled or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly coupled to" or "directly connected to" another element, there are no intervening elements present. The same reference numerals designate the same elements. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In view of the problems in the prior art, in one aspect of the present invention, a cooling system or equipment drainage and drying system is proposed, which is used for the cooling system or equipment of the target station and the pipelines connected thereto.

In another aspect of the present invention, as shown in Figure 1, a cooling system or a drainage drying system for equipment proposed includes: a self-discharging system for media, a normal temperature nitrogen purging system, a high temperature nitrogen purging system and a vacuum drying system, The medium self-discharging system, the normal temperature nitrogen purging system, the high temperature nitrogen purging system and the vacuum drying system are respectively connected with the cooling system.

As shown in Figure 2, the medium autonomous discharge system in this embodiment is mainly for the purpose of autonomously discharging the cooling medium that can flow in the cooling system. Since the cooling medium used in the cooling system in the target station has certain radioactivity, each maintenance Before, the residual amount of cooling medium in the cooling system must be reduced as much as possible. Firstly, the cooling medium in the cooling system must be drained. The self-discharging system of the medium in the present invention is mainly that the cooling system utilizes gravity drainage, including a drain valve installed on the cooling system pipeline, and a storage tank arranged at the end of the cooling system pipeline. A drain pipe is installed on the storage tank, and is connected to the end of the cooling system pipe through the drain pipe, and the storage tank is set under the cooling system pipe, and the drain valve is set between the cooling system and the storage tank. When the cooling system shuts down At this time, open the drain valve on the cooling system pipe, and the flowable cooling medium remaining in the cooling system will be discharged from the drain pipe to the storage tank by gravity drainage until the liquid level of the storage tank no longer rises. At this time, it is defined as flowable. The cooling medium has been discharged autonomously, but there is still residual cooling medium attached to the wall of the cooling system.

In addition, the storage tank is detachably installed and has better replaceability. One or more storage tanks are connected through pipelines; when the storage tank is full, it can be disassembled and replaced at any time.

Of course, the medium self-discharging system in the process of this embodiment is not limited to use in the cooling system, and can also be used for equipment and pipelines that communicate with the cooling system;

And, in the self-discharging system of the medium in the process of this embodiment, a surge box can also be installed between the drain valve and the storage tank to compensate for the water volume change caused by temperature changes or surges in the cooling system, equipment, and pipelines.

As shown in Figure 3, in the normal temperature nitrogen purge system of this embodiment, after the self-discharge system of the medium completes the self-discharging of the flowable cooling medium by gravity, it is mainly to solve the problem of liquid still remaining on the cooling system, equipment, and pipeline walls. Cooling medium problem. The working principle of the normal temperature nitrogen purge system in the present invention is to use normal temperature nitrogen to purge the cooling medium remaining on the cooling system, equipment, and pipeline walls. The purge system includes a nitrogen supply device, a front-end heater and a buffer tank for stabilizing the air pressure. The buffer tank and the nitrogen supply device are connected through a nitrogen transmission pipeline. On the transmission pipeline, the buffer tank is connected to the front end of the cooling system through the pipeline, and a check valve is arranged on the pipeline between the buffer tank and the front end of the cooling system. The nitrogen supply device includes at least one nitrogen cylinder group, a liquid nitrogen pump, Pressure relief valve and protective cover. First, the liquid nitrogen in the nitrogen cylinder is output through a liquid nitrogen pump or other self-pressurizing device. After the liquid nitrogen is decompressed by the pressure reducing valve, it is transported to the front-end heater by the nitrogen transmission pipeline for heating, so that the liquid nitrogen is vaporized to Nitrogen (10-15Mpa), and then the nitrogen enters the buffer tank through the nitrogen transmission pipeline, and the buffer tank depressurizes the passing nitrogen to the normal working range (0.05-0.4Mpa), and then blows to the cooling chamber in sections depending on the pressure difference according to the set flow rate. In the system, equipment, and pipelines, the residual liquid cooling medium on the wall is blown off by normal temperature nitrogen or vaporized and blown dry, and the liquid cooling medium that is blown off is finally drained to the storage tank by the drain pipe until the storage tank Until the liquid level no longer rises, at this time, it is defined as the liquid cooling medium remaining on the wall has been purged by the room temperature nitrogen purge system, but the cooling system, equipment, and pipeline walls still have stronger adhesion. cooling medium.

As shown in Figure 4, in the high-temperature nitrogen purging system of this embodiment, after the normal-temperature nitrogen purging system completes the normal-temperature nitrogen purging and dropping the cooling medium on the residual wall, it is mainly to solve the cooling system, equipment, and pipeline walls. The problem of a more adhering cooling medium still remains. Due to the different diameters of the pipes in the cooling system and equipment, there are differences. The effect of normal temperature nitrogen on the purging and drainage of small pipe diameters is not obvious, resulting in the cooling medium with stronger adhesion remaining on the wall of the cooling pipe. The high-temperature nitrogen purging system in the present invention mainly adopts the method of hot nitrogen purging the cooling medium with stronger adhesion. The high-temperature nitrogen purging system also includes a rear-end heater, which is installed between the buffer tank and the The pipes between the front ends of the cooling system (including the equipment and pipes connected to the cooling system, of course) are arranged at the front end of the check valve. At the same time, the storage tank is connected to a condenser. When the storage tank is often blown with warm nitrogen When the liquid level does not rise after sweeping and draining, it is defined as the liquid cooling medium remaining on the wall has been purged by the normal temperature nitrogen purge system. At this time, under the premise of maintaining the normal temperature nitrogen output, the high temperature nitrogen purge system starts. More specifically: start the back-end heater, and heat the nitrogen blown out of the buffer tank in sections according to the set flow rate to 40-50°C, so that the hot nitrogen is blown into the cooling system, equipment, and pipelines depending on the pressure difference, so that the remaining nitrogen in the cooling system The cooling medium on the pipe wall accelerates vaporization, and the hot nitrogen carries the gaseous cooling medium, which is discharged from the surge tank through the drain pipe of the cooling system to the storage tank. An exhaust dew point meter is installed at the inlet of the drain pipe of the storage tank. When measuring When the dew point temperature of the exhaust gas is less than -20°C, it can be defined as the cooling medium that still remains on the cooling system, equipment, and pipe walls with stronger adhesion has been purged by the hot nitrogen gas purging system. In addition, the gaseous cooling The medium is discharged from the storage tank to the condenser for condensation recovery, and finally discharged to the high-efficiency filter system. At this time, there are still hot nitrogen, gaseous cooling medium, and cooling materials with a high boiling point that are difficult to vaporize on the cooling system, equipment and pipeline walls. medium.

The back-end heater in the process of this embodiment is an electric heater, mainly including a heating tube, a high-temperature flange and a wiring cavity, and its basic parameters: (1) Design pressure: 1Mpa; (2) Working pressure: 0.05-0.4Mpa ; (3) Working voltage: three-phase 380V; (4) Power: 100KW; (5) Heat load on the surface of electric heating tube: 3W/cm2; (6) Design temperature ≤ 200°C; (7) Explosion-proof grade: ExdⅡBT4; (8) )Wiring cavity and flange material: SS304, heating pipe shell material SS304.

As shown in Figure 5, in the vacuum drying system of this embodiment, after the high-temperature nitrogen purge system completes the hot nitrogen purge of the cooling medium, it intervenes mainly to solve the problem of hot nitrogen remaining on the pipe wall of the cooling system and equipment, Gaseous cooling media and cooling media with high boiling points that are difficult to vaporize. The vacuum drying system in the present invention uses vacuum pumping and depressurization to extract hot nitrogen, gaseous cooling medium, and cooling medium with a high boiling point that is difficult to vaporize that still remain on the pipe wall of the cooling system and equipment, including vacuum pumps and gas capture. Cold trap equipment, gas capture cold trap equipment is detachably installed at the end of the cooling system pipe, and the gas capture cold trap equipment is connected with the cooling system and vacuum pump with vacuum hoses, and the gas capture cold trap equipment There is a condensing inlet dew point meter between the cooling system and water. According to the three-phase diagram data of water, when the vacuum degree of the cooling system is lower than 600Pa, the cooling medium retained in the cooling system will absorb heat and become solid, so the cooling system should be maintained , equipment, pipeline vacuum degree is higher than 600Pa, it is necessary to introduce hot nitrogen gas to ensure that the vacuum degree of the cooling system is higher than 600Pa (those skilled in the art can easily understand that after the high temperature nitrogen purge system is stopped, the cooling system, equipment and pipeline wall There is residual hot nitrogen on the surface, or start the high-temperature nitrogen purge system to introduce hot nitrogen to make the vacuum of the cooling system higher than 600Pa). The pressure decreases. At this time, at room temperature, the cooling medium with a high boiling point that is difficult to vaporize has reached a boiling state. After being pumped and purged by a vacuum pump, the hot nitrogen carries the remaining cooling medium in the dead corner to the gas capture cold trap equipment for recovery. The nitrogen is pumped out by the vacuum pump, and the gaseous cooling medium is solidified into a solid cooling medium in the gas capture cold trap equipment. When the gas capture cold trap equipment is fully recovered, it can be disassembled and replaced at any time, which has good replaceability. Alternatively, one or more gas capture cold traps are connected through pipelines, which can improve the recovery efficiency. In addition, when the dew point temperature measured by the condensing inlet dew point meter is less than -20°C, the cooling system, equipment, and pipelines can be determined. The retention of the cooling medium and the flow rate of the introduced hot nitrogen, so as to define that the hot nitrogen remaining on the cooling system, equipment, and pipeline walls, the gaseous cooling medium, and the cooling medium with a high boiling point that is difficult to vaporize have all been pumped out. At this time, The staff can overhaul and maintain the cooling system or replace it with a new cooling medium.

In the vacuum drying system in the process of this embodiment, a drain valve is also installed between the gas capture cold trap equipment, the cooling system, and the pipeline of the equipment, and is arranged at the front end of the condensing intake dew point instrument. Of course, in the process of this embodiment When the vacuum drying system in the machine is involved, the drain valve is open.

As shown in Figures 6 to 8, the gas capture cold trap equipment in the process of this embodiment has the function of condensing and recovering the cooling medium, including the condensation shell and the liquid nitrogen tank assembly, and the liquid nitrogen tank assembly is detachable. In the condensing shell, the upper part of the condensing shell is provided with a condensing inlet and a condensing outlet, which are used to connect the gas capture cold trap equipment with the cooling system and the vacuum pump. The connection method is that the condensing inlet is connected with the cooling system through a vacuum hose. The outlet pipe is connected to the vacuum pump through a vacuum hose. At the same time, the bottom of the condensing shell is provided with a drain port for installing the drain pipe to communicate with the collection tank. Therefore, it is only necessary to heat the gas capture cold trap equipment to condense in the gas The solid cooling medium in the capture cold trap equipment melts into a liquid cooling medium, which is discharged from the drain port at the bottom of the condensing shell through the drain pipe to the collection tank for recovery. The operation is simple and convenient. Further, the condensing inlet dew point meter is set At the condensation inlet of the gas capture cold trap equipment, it is mainly used to determine the retention of the cooling medium in the cooling system, equipment, and pipelines. Of course, it is also necessary to determine the flow rate of the introduced hot nitrogen. In addition, at the condensation outlet of the gas capture cold trap equipment Equipped with a condensate dew point meter, which has the function of capturing gaseous cooling medium in a timely and efficient manner. It is used to ensure that there is no gaseous cooling medium at the condensate outlet, so that only nitrogen is extracted from the condensate outlet. If the condensate dew point meter captures the gaseous cooling medium at the condensate outlet The existence of the liquid nitrogen tank assembly indicates that the liquid nitrogen content in the liquid nitrogen tank assembly is insufficient and needs to be disassembled for replacement. Of course, multiple liquid nitrogen tank assemblies can be installed in the condensation shell at the same time, which can improve the solidification efficiency of the gaseous cooling medium. The liquid nitrogen tank assembly has better replaceability, and it includes a hollow flange and a plurality of hollow cavities installed on the flanges, the hollow cavities are used for filling liquid nitrogen, and the hollow cavities on the hollow cavities The cooling sheet is made of 1.5*10*420 316L stainless steel sheet. The hollow cavity is welded on the side of the flange by argon arc welding (the welding grade is ER308L), and there are liquid nitrogen inlet and nitrogen outlet. The other side of the body is integrally formed with an installation cover plate, which is used for sealing and installing on the top of the condensing shell.

The liquid nitrogen tank assembly undergoes a pressure test: the shell side test pressure is 0.125Mpa, the tube side test pressure is 0.25Mpa, and the test temperature is 5-25°C. The test procedure and acceptance criteria are implemented in accordance with the requirements of GB150.4-2011, and the test is completed. Finally, dry the inside with clean compressed air.

The airtightness test of the liquid nitrogen tank components: the airtightness test of the shell side is 0.1Mpa, the airtightness test of the tube side is 0.2Mpa, and the meson is clean nitrogen. The test procedure and acceptance standard are in accordance with the requirements of GB150.4-2011. After the body components are made, clean dirt, degrease, and pickle and passivate the surface (including welds).

In the process of this embodiment, it is not limited to the nitrogen and liquid nitrogen used, and other inert element gases and their liquid physical states, such as helium, neon, argon, krypton, xenon, etc., can also be used to effectively expand gas Sources can be used to meet the needs of different environments.

The beneficial effects of the present invention are:

1. The self-discharging system of the medium of the present invention, by installing a drain valve and a storage tank under the cooling system, solves the problem of draining and drying of the cooling system in the prior art during operation, maintenance and other emergency situations. In order to ensure that the radioactive gas will not spread to the workplace, avoid the staff from being exposed to internal radiation and workplace pollution, and also ensure the concentration of the cooling medium and the purity of the nitrogen gas at start-up;

2. The room temperature nitrogen purging system of the present invention is provided with a nitrogen supply device, a front-end heater and a buffer tank at the front end of the cooling system, thereby solving the problem that the existing cooling system simply uses the gravity of the cooling medium itself to discharge, so that the cooling There must still be cooling medium on the wall of the system, so that the remaining cooling medium on the wall of the cooling system is blown off by nitrogen at room temperature, and is drained to the storage tank by the drain pipe, so as to further reduce the discharge of cooling medium in the cooling system the purpose of content;

3. The high-temperature nitrogen purging system of the present invention is equipped with a rear-end heater on the basis of the normal-temperature nitrogen purging system, so that the normal-temperature nitrogen is heated to 40-50°C, and the remaining on the cooling pipe wall is realized. The cooling medium is vaporized, and the hot nitrogen gas carries the gaseous cooling medium and is discharged into the storage tank for recovery, which solves the problem that due to the different diameters and differences in the pipes in the cooling system or equipment, the use of nitrogen at room temperature has no obvious effect on purging and drainage of small pipe diameters , leading to the problem that there is still a cooling medium with stronger adhesion on the wall of the cooling pipe;

4. In the vacuum drying system of the present invention, a gas capture cold trap device and a vacuum pump are arranged at the end of the cooling system pipeline, and the heat nitrogen and gaseous cooling medium still remaining on the cooling system pipeline wall are vacuumized and depressurized. And the cooling medium with a high boiling point that is difficult to vaporize is extracted, which solves the problem that there is still a cooling medium with a high boiling point that is difficult to vaporize on the wall of the cooling system pipeline, and also solves the problem that there are other gaseous media in the cooling system pipeline;

5. The gas capture cold trap equipment of the present invention has the function of condensing the cooling medium and reclaiming it. The condensing inlet dew point meter provided can be used to determine the cooling system, equipment, cooling medium retention in the pipeline and the flow rate of the introduced hot nitrogen. The set condensate outlet dew point instrument has the function of being able to capture the gaseous cooling medium in a timely and efficient manner, which is used to ensure that there is no gaseous cooling medium at the condensing outlet, so that only nitrogen is extracted from the condensing outlet.

The above-mentioned embodiments are only specific embodiments of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these obvious replacement forms all belong to the protection scope of the present invention.

Claims (10)

1. A drainage drying system for a cooling system or equipment, characterized in that: the drainage drying system of the cooling system or equipment acts on the cooling system or equipment of the target station; the drainage drying system of the cooling system or equipment includes The media self-discharging system, normal temperature nitrogen purging system, high temperature nitrogen purging system and vacuum drying system are respectively connected to the cooling system. 2. A cooling system or a drain drying system for equipment according to claim 1, characterized in that: the cooling system has a cooling system pipeline through which the cooling medium circulates, and the self-discharging system of the medium includes a cooling system installed in the cooling system pipeline The drain valve on the cooling system and the storage tank at the end of the cooling system pipe. 3. A drainage drying system for a cooling system or equipment according to claim 2, characterized in that: the storage tank is installed below the cooling system pipeline. 4. A cooling system or a drainage drying system for equipment according to claim 2, characterized in that: the normal temperature nitrogen purging system includes a nitrogen supply device, a front-end heater and a buffer tank for stabilizing the air pressure, the The buffer tank is communicated with the nitrogen supply device through a nitrogen transmission pipeline, and a front-end heater is installed on the nitrogen transmission pipeline, and the buffer tank is communicated with the cooling system through a pipeline. 5 . A cooling system or equipment drainage drying system according to claim 4 , wherein the nitrogen supply device includes at least one nitrogen cylinder set, a liquid nitrogen pump, a pressure reducing valve and a protective layer. 6 . 6. A cooling system or equipment drainage drying system according to claim 1, characterized in that: the high-temperature nitrogen purging system includes a back-end heater, and the back-end heater is installed between the buffer tank and the cooling system between the pipes. 7. A cooling system or a drainage drying system for equipment according to claim 2 or 3, characterized in that: an exhaust dew point meter is installed at the inlet of the drain pipe of the storage tank. 8. A cooling system or equipment drainage drying system according to claim 1, characterized in that: the vacuum drying system includes a vacuum pump and a gas capture cold trap device, and the gas capture cold trap device is connected with the cooling system and The vacuum pumps are all connected by vacuum hoses, and a condensate inlet dew point meter is arranged between the gas capture cold trap equipment and the cooling system. 9. A cooling system or equipment drainage drying system according to claim 8, characterized in that: the gas capture cold trap equipment includes a condensation shell and a liquid nitrogen tank assembly, and the liquid nitrogen tank assembly is installed in In the condensing shell, a condensing inlet and a condensing outlet are arranged on the upper part of the condensing shell. 10. A cooling system or equipment drainage drying system according to claim 9, characterized in that: the condensation inlet is connected to the cooling system through a vacuum hose, and the condensation outlet pipe is connected to the vacuum pump through a vacuum hose connection; the bottom of the condensing shell is provided with a drain port.

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