1211 fire extinguishing agent recovery device

Abstract

The utility model discloses a 1211 fire extinguishing agent recovery device which comprises a separation unit, a collection unit, a heat exchange unit and a compression unit, the separation unit comprises a separation tank, a safety valve and a pressure release valve, an inlet end of the separation tank is used for being communicated with an outlet end of a fire extinguishing bottle, an inlet end of the safety valve is communicated with the separation tank, and an outlet end of the pressure release valve is communicated with the collection unit. The pressure release valve is arranged in the separation tank so that the pressure in the separation tank is not lower than the liquefaction pressure of a fire extinguishing agent, and the inlet end of the pressure release valve communicates with the separation tank and is used for discharging nitrogen; the collecting unit comprises a collecting tank; and the heat exchange unit exchanges heat with the fire extinguishing agent in the separation tank, so that the fire extinguishing agent is cooled and liquefied. The 1211 fire extinguishing agent recovery device has the beneficial effects that in the recovery process of the 1211 fire extinguishing agent, impurities such as nitrogen, water, soluble solids and insoluble particles in the fire extinguishing agent can be removed, and the 1211 fire extinguishing agent is purified and then recovered.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing agent recovery technology, and in particular to a 1211 fire extinguishing agent recovery device. Background Technology

[0002] 1211 is the code name for difluorochlorobromomethane, with the molecular formula CF₂ClBr. It is a halon fire extinguishing agent produced and used in China, and is filled into fire extinguishing cylinders in liquid form. Under normal pressure, the boiling point of 1211 fire extinguishing agent is -4℃, meaning it exists in liquid form when the temperature is below -4℃. At room temperature, its liquefaction pressure is 0.9 MPa–1 MPa, meaning it exists in liquid form when the pressure is above 0.9 MPa–1 MPa. 1211 fire extinguishing agent has advantages such as high extinguishing efficiency, low toxicity, low corrosiveness, long shelf life without deterioration, leaving no residue after extinguishing, not contaminating the protected object, and good insulation properties. When maintaining aviation fire extinguishing cylinders, the 1211 fire extinguishing agent must be vented first. Due to the unique physicochemical properties of 1211 fire extinguishing agent, directly releasing it into the air will pollute the environment and damage the ozone layer. Furthermore, the market price of 1211 fire extinguishing agent is approximately 200 yuan / kg, and each batch of this type of fire extinguisher bottle contains approximately 50kg. Excluding labor, water, electricity, and gas costs, the material cost for refilling each batch of fire extinguisher bottles filled with 1211 fire extinguishing agent is approximately 10,000 yuan. Directly releasing 1211 fire extinguishing agent into the air will result in economic waste and increased product maintenance costs. Therefore, it is necessary to recycle and reuse 1211 fire extinguishing agent.

[0003] Existing 1211 fire extinguishing agent recovery devices (such as the method for recovering halon fire extinguishing agent from aviation fire extinguishing bottles disclosed in application number 201310254839.3) cannot purify the 1211 fire extinguishing agent during the recovery process. This is because the 1211 fire extinguishing agent is filled into aviation fire extinguishing bottles via pipeline connections, and the presence of soluble or insoluble solid particles in the pipelines can contaminate the 1211 fire extinguishing agent. After filling the fire extinguishing bottle with the specified weight of 1211 fire extinguishing agent, nitrogen gas is required to reach the preset pressure requirement. Under high pressure inside the fire extinguishing bottle, some nitrogen gas dissolves in the 1211 fire extinguishing agent, affecting its purity. Based on the above analysis of the 1211 fire extinguishing agent filling process in aviation fire extinguishing bottles, the 1211 fire extinguishing agent inside the fire extinguishing bottle may contain impurities such as soluble solids, insoluble solids, and nitrogen gas. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a 1211 fire extinguishing agent recovery device to solve the technical problem that the existing 1211 fire extinguishing agent recovery device cannot purify the 1211 fire extinguishing agent during the recovery process.

[0005] To achieve the above technical objectives, the present invention provides a 1211 fire extinguishing agent recovery device, comprising:

[0006] The separation unit includes a separation tank, a safety valve, and a pressure relief valve. The inlet end of the separation tank is connected to the outlet end of the fire extinguishing bottle. The inlet end of the safety valve is connected to the separation tank to ensure that the pressure inside the separation tank is not lower than the liquefaction pressure of the fire extinguishing agent. The inlet end of the pressure relief valve is connected to the separation tank to discharge nitrogen gas.

[0007] A collection unit, which includes a collection tank;

[0008] A heat exchange unit that exchanges heat with the extinguishing agent in the separation tank to cool and liquefy the extinguishing agent;

[0009] The compression unit has its inlet connected to the separation tank and its outlet connected to the collection tank, and is used to compress the gaseous extinguishing agent that passes through.

[0010] Furthermore, the separation unit also includes an inlet pipe and an inlet valve. The outlet end of the inlet pipe is connected to the bottom of the separation tank, the outlet end of the inlet valve is connected to the inlet end of the inlet pipe, and the inlet end of the inlet valve is used to connect to the outlet end of the fire extinguishing bottle.

[0011] Furthermore, the separation unit also includes a four-way pipe, an exhaust valve, and a first check valve. The inlet end of the four-way pipe is connected to the inner top of the separation tank, the inlet end of the safety valve is connected to the first outlet end of the four-way pipe, the inlet end of the exhaust valve is connected to the second outlet end of the four-way pipe, the inlet end of the first check valve is connected to the third outlet end of the four-way pipe, the inlet end of the pressure relief valve is connected to the outlet end of the first check valve, and the inlet end of the compression unit is connected to the outlet end of the exhaust valve.

[0012] Furthermore, the collection unit also includes an air inlet pipe and an air inlet valve. The outlet end of the air inlet pipe is connected to the inner top of the collection tank, the outlet end of the air inlet valve is connected to the inlet end of the air inlet pipe, and the outlet end of the compression unit is connected to the inlet end of the air inlet valve.

[0013] Furthermore, the collection unit also includes a discharge pipe and a discharge valve. The inlet end of the discharge pipe is connected to the inner bottom of the collection tank, and the inlet end of the discharge valve is connected to the outlet end of the discharge pipe.

[0014] Furthermore, the heat exchange unit includes a first heat exchange coil, which is disposed inside the separation tank, and the coolant in the first heat exchange coil is used to exchange heat with the fire extinguishing agent in the separation tank.

[0015] Furthermore, the heat exchange unit also includes a second heat exchange coil and a heat exchanger. The second heat exchange coil is disposed in the collection tank. The coolant in the second heat exchange coil is used to exchange heat with the extinguishing agent in the collection tank to absorb the heat of the extinguishing agent. The heat exchanger is connected to both the first heat exchange coil and the second heat exchange coil so that the coolant circulates within the first heat exchange coil and the second heat exchange coil.

[0016] Furthermore, the heat exchanger includes a first circuit, a second circuit, a drive pump, and a chiller. The outlet end of the first circuit is connected to the inlet end of the first heat exchange coil, the inlet end of the first circuit is connected to the outlet end of the second heat exchange coil, the inlet end of the second circuit is connected to the outlet end of the first heat exchange coil, the inlet end of the drive pump is connected to the outlet end of the second circuit, and the outlet end of the drive pump is connected to the inlet end of the second heat exchange coil, so that the coolant circulates within the first and second heat exchange coils. The chiller is used to cool the coolant.

[0017] Furthermore, the compression unit includes a second check valve and a compressor. The inlet end of the second check valve is connected to the outlet end of the exhaust valve, the inlet end of the compressor is connected to the outlet end of the second check valve, and the outlet end of the compressor is connected to the inlet end of the intake valve.

[0018] Furthermore, the 1211 fire extinguishing agent recovery device also includes a control unit, which is used to monitor the temperature of the liquid fire extinguishing agent in the separation tank and the collection tank, monitor the pressure in the separation tank and the collection tank, and adjust the temperature of the coolant.

[0019] Compared with the prior art, the beneficial effects of this utility model include: During use, the inlet end of the separator is connected to the outlet end of the fire extinguisher bottle. The liquid high-pressure extinguishing agent mixture in the fire extinguisher bottle enters the separator. A safety valve releases some pressure, ensuring the pressure inside the separator is not lower than the liquefaction pressure of the extinguishing agent. Then, heat exchange occurs between the extinguishing agent and the separator through a heat exchange unit, keeping the extinguishing agent's temperature below its boiling point. The pressure relief valve is then opened to remove nitrogen dissolved in the extinguishing agent. Finally, heat exchange occurs between the extinguishing agent and the separator through the heat exchange unit. Heat exchange is performed to bring the temperature of the extinguishing agent to between its boiling point and 0°C, causing it to begin evaporating. At this point, only the extinguishing agent is in a gaseous state, which removes impurities such as water, soluble solids, and insoluble particles. The gaseous extinguishing agent then enters the compression unit and is compressed, causing it to liquefy in the collection tank. Using this 1211 extinguishing agent recovery device, impurities such as nitrogen, water, soluble solids, and insoluble particles are removed during the recovery process. The 1211 extinguishing agent is purified before being recovered. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a 1211 fire extinguishing agent recovery device provided by this utility model;

[0021] In the diagram: 1 - Fire extinguisher bottle, 100 - Separation unit, 110 - Separation tank, 120 - Safety valve, 130 - Pressure relief valve, 140 - Liquid inlet valve, 150 - Four-way pipe, 160 - Exhaust valve, 170 - First check valve, 180 - First drain valve, 190 - First stirring assembly, 200 - Collection unit, 210 - Collection tank, 220 - Air inlet pipe, 230 - Air inlet valve, 240 - Discharge pipe, 250 - Discharge valve, 260 - Second drain valve, 270 - Second stirring assembly, 300 - Heat exchange unit, 310 - First heat exchange coil, 320 - Second heat exchange coil, 330 - Heat exchanger, 400 - Compression unit, 410 - Second check valve, 420 - Compressor, 500 - Control unit, 510 - First temperature sensor, 520 - Second temperature sensor, 530 - First pressure sensor, 540 - Second pressure sensor, 550 - Controller. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] This utility model provides a 1211 fire extinguishing agent recovery device, the structure of which is as follows: Figure 1As shown, the system includes a separation unit 100, a collection unit 200, a heat exchange unit 300, and a compression unit 400. The separation unit 100 includes a separation tank 110, a safety valve 120, and a pressure relief valve 130. The inlet of the separation tank 110 is connected to the outlet of the fire extinguishing bottle 1. The inlet of the safety valve 120 is connected to the separation tank 110 to ensure that the pressure inside the separation tank 110 is not lower than the liquefaction pressure of the extinguishing agent. The inlet of the pressure relief valve 130 is connected to the separation tank 110 to discharge nitrogen gas. The collection unit 200 includes a collection tank 210. The heat exchange unit 300 exchanges heat with the extinguishing agent inside the separation tank 110 to cool and liquefy the extinguishing agent. The inlet of the compression unit 400 is connected to the separation tank 110, and its outlet is connected to the collection tank 210 to compress the passing gaseous extinguishing agent.

[0024] In use, the inlet of the separator 110 is connected to the outlet of the fire extinguishing bottle 1. The liquid high-pressure extinguishing agent mixture in the fire extinguishing bottle 1 enters the separator 110. The safety valve 120 releases some pressure, ensuring the pressure in the separator 110 is not lower than the liquefaction pressure of the extinguishing agent. This guarantees the extinguishing agent remains liquid at room temperature. Nitrogen dissolved in the extinguishing agent is released due to the pressure reduction, initially removing nitrogen from the extinguishing agent. Then, heat exchange is performed between the extinguishing agent and the heat exchange unit 300, cooling the extinguishing agent to below its boiling point. The pressure relief valve 130 is then opened to further remove dissolved nitrogen, emptying the separator 110. After the nitrogen in the extinguishing agent is removed, the pressure relief valve 130 is closed. Then, the extinguishing agent in the separation tank 110 undergoes heat exchange through the heat exchange unit 300, raising the temperature of the extinguishing agent in the separation tank 110 to between the boiling point and 0°C. The extinguishing agent begins to evaporate. At this time, only the extinguishing agent is in a gaseous state, which can remove impurities such as water, soluble solids, and insoluble particles. The gaseous extinguishing agent enters the compression unit 400 and is compressed by the compression unit 400, causing the gaseous extinguishing agent to liquefy in the collection tank 210. Using this 1211 extinguishing agent recovery device, impurities such as nitrogen, water, soluble solids, and insoluble particles can be removed from the extinguishing agent during the recovery process. The 1211 extinguishing agent is purified before being recovered.

[0025] As a preferred embodiment, please refer to Figure 1The separation unit 100 further includes an inlet pipe and an inlet valve 140. The outlet end of the inlet pipe is connected to the inner bottom of the separation tank 110, and the outlet end of the inlet valve 140 is connected to the inlet end of the inlet pipe. The inlet end of the inlet valve 140 is used to connect to the outlet end of the fire extinguishing bottle 1. After connecting the inlet end of the inlet valve 140 to the outlet end of the fire extinguishing bottle 1, the inlet valve 140 is opened, and the liquid high-pressure extinguishing agent mixture in the fire extinguishing bottle 1 enters the separation tank 110 along the inlet pipe. Then the inlet valve 140 is closed.

[0026] As a preferred embodiment, please refer to Figure 1 The separation unit 100 further includes a four-way pipe 150, an exhaust valve 160, and a first check valve 170. The inlet end of the four-way pipe 150 is connected to the inner top of the separation tank 110. The inlet end of the safety valve 120 is connected to the first outlet end of the four-way pipe 150. The inlet end of the exhaust valve 160 is connected to the second outlet end of the four-way pipe 150. The inlet end of the first check valve 170 is connected to the third outlet end of the four-way pipe 150. The inlet end of the pressure relief valve 130 is connected to the first check valve 170. The outlet end of the 0 is connected, and the inlet end of the compression unit 400 is connected to the outlet end of the exhaust valve 160. Gas conversion and flow are carried out through the four-way pipe 150. The opening pressure of the safety valve 120 is set to 1.2MPa, so that the separation tank 110 always maintains a residual pressure of not less than 1.2MPa, thereby ensuring that the extinguishing agent remains liquid at room temperature. Most of the nitrogen gas used for pressurization and filling into the fire extinguishing bottle 1 is separated. The first check valve 170 can prevent external air from entering the separation tank 110.

[0027] As a preferred embodiment, please refer to Figure 1 The collection unit 200 further includes an air inlet pipe 220 and an air inlet valve 230. The outlet end of the air inlet pipe 220 is connected to the inner top of the collection tank 210, and the outlet end of the air inlet valve 230 is connected to the inlet end of the air inlet pipe 220. The outlet end of the compression unit 400 is connected to the inlet end of the air inlet valve 230. When the extinguishing agent begins to evaporate, the exhaust valve 160 and the air inlet valve 230 are opened, and the gaseous extinguishing agent enters the compression unit 400 and is compressed by the compression unit 400, so that the gaseous extinguishing agent is liquefied in the collection tank 210.

[0028] As a preferred embodiment, please refer to Figure 1The collection unit 200 also includes a discharge pipe 240 and a discharge valve 250. The inlet end of the discharge pipe 240 is connected to the bottom of the collection tank 210, and the inlet end of the discharge valve 250 is connected to the outlet end of the discharge pipe 240. When it is necessary to discharge the liquid extinguishing agent in the collection tank 210, the outlet end of the discharge valve 250 is connected to the inlet end of the repaired fire extinguishing bottle 1, the outlet end of the discharge valve 250 is connected to the recovery tank, and the discharge valve 250 is opened to recover and store the extinguishing agent (in a refined state).

[0029] As a preferred embodiment, please refer to Figure 1 The heat exchange unit 300 includes a first heat exchange coil 310, which is disposed inside the separation tank 110. The coolant in the first heat exchange coil 310 is used to exchange heat with the fire extinguishing agent in the separation tank 110. By exchanging heat with the fire extinguishing agent in the separation tank 110 through the coolant in the first heat exchange coil 310, the fire extinguishing agent can be cooled down first, so that the temperature of the fire extinguishing agent is below the boiling point, and then heated up, so that the temperature of the fire extinguishing agent is between the boiling point and 0°. When the temperature of the fire extinguishing agent is below the boiling point, the fire extinguishing agent in the separation tank 110 exists in liquid form. After opening the pressure relief valve 130 to vent the nitrogen in the separation tank 110, the pressure relief valve 130 is closed.

[0030] As a preferred embodiment, please refer to Figure 1 The heat exchange unit 300 further includes a second heat exchange coil 320 and a heat exchanger 330. The second heat exchange coil 320 is disposed inside the collection tank 210. The coolant in the second heat exchange coil 320 is used to exchange heat with the extinguishing agent in the collection tank 210 to absorb the heat of the extinguishing agent. The heat exchanger 330 is connected to both the first heat exchange coil 310 and the second heat exchange coil 320, so that the coolant circulates within the first heat exchange coil 310 and the second heat exchange coil 320, thereby ensuring that the first heat exchange coil 310 and the second heat exchange coil 320 are in cyclical communication. In the separation tank 110, the coolant, which cools down due to the heat absorbed by the evaporation of the extinguishing agent, is circulated to the collection tank 210. On the one hand, the low temperature condition can better assist the liquefaction of the gaseous extinguishing agent. On the other hand, the heat released by liquefaction will be carried by the coolant to the separation tank 110 to assist the evaporation of the extinguishing agent, forming a closed loop of heat circulation. In addition, by controlling the cooling temperature between the boiling point and 0°C, the temperature of the coolant is controlled only when it enters the separation tank 110, so as to ensure that only the extinguishing agent is evaporated, thus controlling the stable and effective operation of the entire system and achieving an energy-saving effect.

[0031] As a preferred embodiment, please refer to Figure 1The heat exchanger 330 includes a first circuit, a second circuit, a drive pump, and a chiller. The outlet end of the first circuit is connected to the inlet end of the first heat exchange coil 310, and the inlet end of the first circuit is connected to the outlet end of the second heat exchange coil 320. The inlet end of the second circuit is connected to the outlet end of the first heat exchange coil 310, the inlet end of the drive pump is connected to the outlet end of the second circuit, and the outlet end of the drive pump is connected to the inlet end of the second heat exchange coil 320, so that the coolant circulates within the first heat exchange coil 310 and the second heat exchange coil 320. The chiller is used to cool the coolant, thereby making the first heat exchange coil 310 and the second heat exchange coil 320 circulate and connected, and the coolant can circulate within the first heat exchange coil 310 and the second heat exchange coil 320.

[0032] As a preferred embodiment, please refer to Figure 1 The compression unit 400 includes a second check valve 410 and a compressor 420. The inlet end of the second check valve 410 is connected to the outlet end of the exhaust valve 160. The inlet end of the compressor 420 is connected to the outlet end of the second check valve 410. The outlet end of the compressor 420 is connected to the inlet end of the intake valve 230. The second check valve 410 can prevent the backflow of gaseous fire extinguishing agent compressed by the compressor 420.

[0033] As a preferred embodiment, please refer to Figure 1 The 1211 fire extinguishing agent recovery device further includes a control unit 500, which is used to monitor the temperature of the liquid fire extinguishing agent in the separation tank 110 and the collection tank 210, monitor the pressure in the separation tank 110 and the collection tank 210, and adjust the temperature of the coolant, thereby enabling intelligent regulation of the system temperature.

[0034] As a preferred embodiment, please refer to Figure 1The control unit 500 includes a first temperature sensor 510, a second temperature sensor 520, a first pressure sensor 530, a second pressure sensor 540, and a controller 550. The first temperature sensor 510 is located at the bottom inside the separation tank 110 to monitor the temperature of the liquid extinguishing agent inside the separation tank 110. The second temperature sensor 520 is located at the bottom inside the collection tank 210 to monitor the temperature of the liquid extinguishing agent inside the collection tank 210. The first pressure sensor 530 is located at the top inside the separation tank 110 to monitor the pressure inside the separation tank 110. The second pressure sensor 540 is located at the top inside the collection tank 210 to monitor the pressure inside the collection tank 210. The controller 550 is electrically connected to the drive pump to control the start and stop of the drive pump. The controller 550 is also electrically connected to the refrigeration unit to control the start and stop of the refrigeration unit, thereby improving the accuracy of temperature control.

[0035] In a preferred embodiment, the controller 550 is a combination of a temperature controller and a computer.

[0036] As a preferred embodiment, please refer to Figure 1 The controller 550 is also electrically connected to the compressor 420 and is used to control the start and stop of the compressor 420, thereby realizing intelligent control of the start and stop of the compressor 420.

[0037] As a preferred embodiment, please refer to Figure 1 The separation unit 100 also includes a first drain valve 180, the inlet end of which is connected to the bottom of the separation tank 110 to discharge impurities in the separation tank 110. Opening the first drain valve 180 can discharge the impurities in the separation tank 110.

[0038] As a preferred embodiment, please refer to Figure 1 The separation unit 100 further includes a first stirring assembly 190, which includes a first stirring paddle and a first rotation drive. The first stirring paddle is disposed at the bottom of the separation tank 110, and the first rotation drive is disposed outside the separation tank 110. The output end of the first rotation drive is connected to the central axis of the first stirring paddle and is used to drive the first stirring paddle to rotate so that the first stirring paddle stirs the liquid fire extinguishing agent, thereby circulating the liquid fire extinguishing agent and making the fire extinguishing agent cool down evenly.

[0039] As a preferred embodiment, please refer to Figure 1The separation unit 100 also includes an ultrasonic vibrator, which is located at the bottom of the separation tank 110 to cause the nitrogen in the separation tank 110 to vibrate, thereby assisting in the discharge of nitrogen dissolved in the extinguishing agent.

[0040] As a preferred embodiment, please refer to Figure 1 The collection unit 200 further includes a second drain valve 260, the inlet end of which is connected to the bottom of the collection tank 210 to discharge impurities in the collection tank 210. Opening the second drain valve 260 can discharge the impurities in the collection tank 210.

[0041] As a preferred embodiment, please refer to Figure 1 The collection unit 200 further includes a second stirring assembly 270, which includes a second stirring paddle and a second rotation drive. The second stirring paddle is disposed at the inner bottom of the collection tank 210, and the second rotation drive is disposed outside the collection tank 210. The output end of the second rotation drive is connected to the central shaft of the second stirring paddle and is used to drive the second stirring paddle to rotate so that the second stirring paddle stirs the liquid extinguishing agent, thereby circulating the liquid extinguishing agent and making the temperature of the extinguishing agent uniform.

[0042] In a preferred embodiment, the controller 550 is also electrically connected to both the first rotation drive and the second rotation drive, and is used to control the start and stop of the first rotation drive and the second rotation drive.

[0043] To better understand this utility model, the following is combined with... Figure 1 The working principle of the technical solution of this utility model will be described in detail below:

[0044] In use, after connecting the inlet end of the liquid inlet valve 140 to the outlet end of the fire extinguishing bottle 1, close the exhaust valve 160 and the pressure relief valve 130, set the opening pressure of the safety valve 120 to 1.2 MPa, open the liquid inlet valve 140, and the liquid high-pressure extinguishing agent mixture in the fire extinguishing bottle 1 enters the separation tank 110 along the liquid inlet pipe. Then close the liquid inlet valve 140, and release some pressure through the safety valve 120. The safety valve 120 can maintain a residual pressure of not less than 1.2 MPa in the separation tank 110, thereby ensuring that the extinguishing agent is in a liquid state at room temperature, and the nitrogen dissolved in the extinguishing agent is... The pressure is released upon pressure reduction, initially removing nitrogen from the extinguishing agent. Then, the controller 550 sets the temperature of the extinguishing agent below its boiling point. Heat exchange occurs between the coolant in the first heat exchange coil 310 and the extinguishing agent in the separation tank 110, allowing for initial cooling of the extinguishing agent to below its boiling point. The pressure relief valve 130 is then opened to further remove dissolved nitrogen from the extinguishing agent. After venting the nitrogen from the separation tank 110, the pressure relief valve 130 is closed. The exhaust valve 160 is then opened, and the controller 550 sets the temperature of the extinguishing agent between its boiling point and 0°C. The first heat exchange... The coolant in coil 310 exchanges heat with the extinguishing agent in the separator 110, raising the temperature of the extinguishing agent in the separator 110 to between its boiling point and 0°C. The extinguishing agent begins to evaporate; at this point, only the extinguishing agent is in a gaseous state, which removes impurities such as water, soluble solids, and insoluble particles. The gaseous extinguishing agent enters the compressor 420 and is compressed, causing it to liquefy in the collection tank 210. The first heat exchange coil 310 and the second heat exchange coil 320 are connected via the first and second circuits of the heat exchanger 330, allowing the coolant to circulate within the first heat exchange coil. A circulation is formed within the heat exchange coil 310 and the second heat exchange coil 320. In the separation tank 110, the coolant, which cools down due to the heat absorption of the extinguishing agent during evaporation, circulates to the collection tank 210. On the one hand, the low temperature condition can better assist the liquefaction of the gaseous extinguishing agent; on the other hand, the heat released by liquefaction will be carried by the coolant to the separation tank 110 to assist the evaporation of the extinguishing agent, forming a closed loop of heat circulation. By using this 1211 extinguishing agent recovery device, impurities such as nitrogen, water, soluble solids, and insoluble particles in the extinguishing agent can be removed during the recovery process. The 1211 extinguishing agent is purified before being recovered.

[0045] The 1211 fire extinguishing agent recovery device provided by this utility model has the following beneficial effects:

[0046] (1) The safety valve 120 can keep the residual pressure of the separation tank 110 at not less than 1.2 MPa, so as to ensure that the extinguishing agent is in liquid state at room temperature. The nitrogen dissolved in the extinguishing agent is released due to the pressure reduction, and the nitrogen in the extinguishing agent is initially removed. The extinguishing agent can be cooled first by the heat exchange liquid in the first heat exchange coil 310 and the extinguishing agent in the separation tank 110 through heat exchange, so that the temperature of the extinguishing agent is below the boiling point, and the nitrogen dissolved in the extinguishing agent is further removed. The extinguishing agent can be heated by the heat exchange liquid in the first heat exchange coil 310 and the extinguishing agent in the separation tank 110 through heat exchange, so that the temperature of the extinguishing agent is between the boiling point and 0°. The extinguishing agent begins to evaporate. At this time, only the extinguishing agent is in gaseous state, which can remove impurities such as water, soluble solids, and insoluble particles.

[0047] (2) The first heat exchange coil 310 and the second heat exchange coil 320 are connected through the first circuit and the second circuit of the heat exchanger 330 so that the coolant forms a circulation in the first heat exchange coil 310 and the second heat exchange coil 320. In the separation tank 110, the coolant that is cooled down due to the heat absorption of the extinguishing agent evaporation is circulated to the collection tank 210. On the one hand, the low temperature condition can better assist the liquefaction of the gaseous extinguishing agent. On the other hand, the heat released by liquefaction will be circulated by the coolant to the separation tank 110 to assist the evaporation of the extinguishing agent, forming a closed loop of heat circulation, which also achieves an energy-saving effect.

[0048] (3) By using this 1211 fire extinguishing agent recovery device, during the recovery process of 1211 fire extinguishing agent, impurities such as nitrogen, water, soluble solids, and insoluble particles in the fire extinguishing agent can be removed, and the 1211 fire extinguishing agent can be purified before being recovered.

[0049] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A 1211 fire extinguishing agent recovery device, characterized in that, include: The separation unit includes a separation tank, a safety valve, and a pressure relief valve. The inlet end of the separation tank is connected to the outlet end of the fire extinguishing bottle. The inlet end of the safety valve is connected to the separation tank to ensure that the pressure inside the separation tank is not lower than the liquefaction pressure of the fire extinguishing agent. The inlet end of the pressure relief valve is connected to the separation tank to discharge nitrogen gas. A collection unit, which includes a collection tank; A heat exchange unit that exchanges heat with the extinguishing agent in the separation tank to cool and liquefy the extinguishing agent; The compression unit has its inlet connected to the separation tank and its outlet connected to the collection tank, and is used to compress the gaseous extinguishing agent that passes through.

2. The 1211 fire extinguishing agent recovery device according to claim 1, characterized in that, The separation unit also includes an inlet pipe and an inlet valve. The outlet end of the inlet pipe is connected to the bottom of the separation tank, the outlet end of the inlet valve is connected to the inlet end of the inlet pipe, and the inlet end of the inlet valve is used to connect to the outlet end of the fire extinguishing bottle.

3. The 1211 fire extinguishing agent recovery device according to claim 1, characterized in that, The separation unit also includes a four-way pipe, an exhaust valve, and a first check valve. The inlet end of the four-way pipe is connected to the inner top of the separation tank. The inlet end of the safety valve is connected to the first outlet end of the four-way pipe. The inlet end of the exhaust valve is connected to the second outlet end of the four-way pipe. The inlet end of the first check valve is connected to the third outlet end of the four-way pipe. The inlet end of the pressure relief valve is connected to the outlet end of the first check valve. The inlet end of the compression unit is connected to the outlet end of the exhaust valve.

4. The 1211 fire extinguishing agent recovery device according to claim 3, characterized in that, The collection unit also includes an air inlet pipe and an air inlet valve. The outlet end of the air inlet pipe is connected to the inner top of the collection tank, the outlet end of the air inlet valve is connected to the inlet end of the air inlet pipe, and the outlet end of the compression unit is connected to the inlet end of the air inlet valve.

5. The 1211 fire extinguishing agent recovery device according to claim 1, characterized in that, The collection unit also includes a discharge pipe and a discharge valve. The inlet end of the discharge pipe is connected to the bottom of the collection tank, and the inlet end of the discharge valve is connected to the outlet end of the discharge pipe.

6. The 1211 fire extinguishing agent recovery device according to claim 1, characterized in that, The heat exchange unit includes a first heat exchange coil, which is disposed inside the separation tank. The coolant in the first heat exchange coil is used to exchange heat with the fire extinguishing agent in the separation tank.

7. The 1211 fire extinguishing agent recovery device according to claim 6, characterized in that, The heat exchange unit further includes a second heat exchange coil and a heat exchanger. The second heat exchange coil is disposed in the collection tank. The coolant in the second heat exchange coil is used to exchange heat with the extinguishing agent in the collection tank to absorb the heat of the extinguishing agent. The heat exchanger is connected to both the first heat exchange coil and the second heat exchange coil so that the coolant circulates within the first heat exchange coil and the second heat exchange coil.

8. The 1211 fire extinguishing agent recovery device according to claim 7, characterized in that, The heat exchanger has a first circuit, a second circuit, a drive pump, and a chiller. The outlet end of the first circuit is connected to the inlet end of the first heat exchange coil, the inlet end of the first circuit is connected to the outlet end of the second heat exchange coil, the inlet end of the second circuit is connected to the outlet end of the first heat exchange coil, the inlet end of the drive pump is connected to the outlet end of the second circuit, and the outlet end of the drive pump is connected to the inlet end of the second heat exchange coil, so that the coolant circulates in the first heat exchange coil and the second heat exchange coil. The chiller is used to cool the coolant.

9. The 1211 fire extinguishing agent recovery device according to claim 4, characterized in that, The compression unit includes a second check valve and a compressor. The inlet end of the second check valve is connected to the outlet end of the exhaust valve, the inlet end of the compressor is connected to the outlet end of the second check valve, and the outlet end of the compressor is connected to the inlet end of the intake valve.

10. The 1211 fire extinguishing agent recovery device according to claim 1, characterized in that, It also includes a control unit, which is used to monitor the temperature of the liquid extinguishing agent in the separation tank and the collection tank, the control unit is also used to monitor the pressure in the separation tank and the collection tank, and the control unit is also used to adjust the temperature of the coolant.

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