Outdoor low-temperature liquid storage tank

Abstract

The utility model discloses an outdoor low-temperature liquid storage tank which comprises an outer tank, an inner tank, a heat preservation layer located between the outer tank and the inner tank and a controller, the outer tank and the inner tank are connected through a plurality of connecting ribs, and the outer tank is supported through a plurality of supporting frames arranged on the outer wall in a surrounding mode; a liquid inlet pipe and a liquid outlet pipe which are communicated with the inner tank are respectively arranged at the bottom of the outer tank; a recovery pipe communicated with the top of the inner tank is arranged at the top end of the outer tank, and the other end of the recovery pipe is communicated with the boil-off gas treatment assembly; a pressure balance valve is arranged at the inlet of the recovery pipe, and the controlled end of the pressure balance valve is connected with the output end of the controller; the evaporation gas treatment assembly is arranged, evaporated gas is effectively treated and recycled, waste of liquid resources is avoided, meanwhile, the situation that the evaporated gas destroys the environment is avoided, the situation in the storage tank is monitored in real time through multiple sensors, and the storage tank is convenient to use. And warning and maintenance processing can be carried out in time.

Description

Technical Field

[0001] The utility model relates to a low-temperature liquid storage tank, in particular to an outdoor low-temperature liquid storage tank. Background Art

[0002] A cryogenic liquid storage tank is a special equipment, generally used to store liquids such as liquid nitrogen, liquid oxygen, and liquid carbon dioxide. During the storage process, the evaporation and gasification of the liquid will cause temperature fluctuations and liquid loss inside the tank. Traditional cryogenic liquid storage tanks have deficiencies in insulation and temperature control, resulting in a high evaporation rate of the liquid, affecting storage effects and safety.

[0003] When existing cryogenic liquid storage tanks are used outdoors, the liquid stored inside evaporates due to the influence of the external environment, causing the pressure inside the tank to change. Therefore, the cryogenic liquid storage tank needs to be depressurized in time. However, if the pressure relief valve is opened directly to release the pressure, a large amount of gas will be wasted after internal evaporation, and it will be impossible to recover it. Moreover, for some harmful gases, if they are released directly, it will also cause certain pollution to the environment. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an outdoor low-temperature liquid storage tank, which can collect and process the evaporated gas in the tank body so as to reuse it later and avoid waste.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows.

[0006] An outdoor low-temperature liquid storage tank comprises an outer tank, an inner tank, an insulation layer located between the outer tank and the inner tank, and a controller, wherein the outer tank and the inner tank are connected by a plurality of connecting ribs, and the outer tank is supported by a plurality of supporting frames arranged around the outer wall; a liquid inlet pipe and a liquid outlet pipe connected to the inner tank are respectively arranged at the bottom of the outer tank; a recovery pipe connected to the top of the inner tank is arranged at the top of the outer tank, and the other end of the recovery pipe is connected to an evaporation gas processing component; a pressure balancing valve is arranged at the inlet of the recovery pipe, and the controlled end of the pressure balancing valve is connected to the output end of the controller; a temperature sensor and a pressure sensor are respectively installed at the top of the inner tank, and a liquid level sensor is also installed inside the inner tank, and the output ends of the temperature sensor, the pressure sensor and the liquid level sensor are respectively connected to the input end of the controller.

[0007] In the above-mentioned outdoor cryogenic liquid storage tank, the thermal insulation layer comprises a vacuum layer, an aerogel thermal insulation layer, and a reflective layer which are arranged in sequence.

[0008] The above-mentioned outdoor low-temperature liquid storage tank, the evaporated gas processing component includes a drying box and a condenser connected to the recovery pipe, the drying box is installed on the top of the condenser through a mounting bracket and is connected to the condenser through a pipeline, and the condenser is connected to the liquid inlet pipe through a reflux pipe; the drying box is equipped with a desiccant for absorbing the mixed moisture in the evaporated gas; the condenser includes an air compressor and a refrigerator.

[0009] In the above-mentioned outdoor low-temperature liquid storage tank, a first solenoid valve is installed on the liquid inlet pipe, and a second solenoid valve is installed on the liquid outlet pipe. The controlled ends of the first solenoid valve and the second solenoid valve are respectively connected to the output end of the controller.

[0010] In the above-mentioned outdoor low-temperature liquid storage tank, a sealing seat is installed at the connection between the recovery pipe and the outer tank surface to ensure the overall sealing of the tank body.

[0011] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0012] The utility model provides an outdoor low-temperature liquid storage tank. By arranging an evaporation gas processing component, the evaporated gas is effectively processed and recycled, thereby avoiding waste of liquid resources and at the same time avoiding damage to the environment caused by the evaporated gas. The temperature sensor, pressure sensor and liquid level sensor are respectively arranged to monitor the situation inside the storage tank in real time, and the intelligent controller is used to control timely warnings and maintenance processing, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the specific structure of the utility model.

[0014] Wherein: 1. outer tank, 2. inner tank, 3. vacuum layer, 4. aerogel insulation layer, 5. reflection layer, 6. support frame, 7. recovery pipe, 8. drying box, 9. condenser, 10. mounting bracket, 11. reflux pipe, 12. liquid inlet pipe, 13. liquid outlet pipe, 14. first solenoid valve, 15. second solenoid valve, 16. sealing seat, 17. temperature sensor, 18. pressure sensor, 19. protective shell, 20. liquid level sensor. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] An outdoor cryogenic liquid storage tank, such as Figure 1 As shown, it includes an outer tank 1, an inner tank 2, an insulation layer located between the outer tank 1 and the inner tank 2, and a controller. The outer tank 1 and the inner tank 2 are connected by a plurality of connecting ribs, and the outer tank 1 is supported by a plurality of support frames 6 arranged around the outer wall.

[0017] The bottom of the outer tank 1 is respectively provided with a liquid inlet pipe 12 and a liquid outlet pipe 13 connected to the inner tank 2, and the top of the outer tank 1 is provided with a recovery pipe 7 connected to the inner tank 2, and the other end of the recovery pipe 7 is connected to the evaporation gas treatment assembly.

[0018] A sealing seat 16 is installed at the connection between the recovery pipe 7 and the outer tank surface to ensure the overall sealing of the tank body.

[0019] A pressure balance valve is provided at the inlet of the recovery pipe 7 to release the evaporated gas, and a controlled end of the pressure balance valve is connected to an output end of the controller.

[0020] The surface of the outer tank 1 is coated with a protective coating, which can prevent the external environment from damaging the surface of the outer tank and prevent the influence of changes in the external environment on the temperature of the inner tank.

[0021] A temperature sensor 17 and a pressure sensor 18 are installed at the top of the inner tank 2, respectively, which can detect the temperature and pressure inside the inner tank 2, so as to avoid the explosion of the tank due to excessive pressure and affect the thermal insulation performance of the tank.

[0022] The temperature sensor 17 and the pressure sensor 18 are respectively provided with protective shells 19 on their exteriors for protection.

[0023] A liquid level sensor 20 is also installed inside the inner tank 2 to monitor the liquid level in the tank so that it can be replenished in time.

[0024] The output ends of the temperature sensor 17 , the pressure sensor 18 and the liquid level sensor 20 are respectively connected to the input ends of the controller.

[0025] The thermal insulation layer includes a vacuum layer 3, an aerogel thermal insulation layer 4, and a reflective layer 5 which are arranged in sequence, wherein the vacuum layer 3 can effectively isolate external heat by utilizing the principle of extremely low heat conduction under vacuum state, the interior of the aerogel thermal insulation layer 4 is filled with aerogel material with extremely low thermal conductivity and excellent thermal insulation performance, and can perform good thermal insulation, and the reflective layer 5 can reflect most of the thermal radiation and reduce heat loss.

[0026] The evaporated gas processing assembly includes a drying box 8 and a condenser 9. The drying box 8 is installed on the top of the condenser 9 through a mounting bracket 10 and is connected to the condenser 9 through a pipeline.

[0027] The top of the drying box 8 is connected to the recovery pipe 7. The drying box 8 is filled with a desiccant to absorb the moisture mixed in the evaporated gas.

[0028] The condenser 9 includes an air compressor and a refrigerator, which can liquefy the gas so as to facilitate its re-entry into the storage tank for utilization. The controlled end of the condenser 9 is connected to the output end of the controller.

[0029] The condenser 9 is connected to the liquid inlet pipe through the reflux pipe 11, and can send the liquefied gas into the storage tank for reuse.

[0030] A first solenoid valve 14 is installed on the liquid inlet pipe 12, and a second solenoid valve 15 is installed on the liquid outlet pipe 13. The controlled ends of the first solenoid valve 14 and the second solenoid valve 15 are respectively connected to the output end of the controller.

[0031] When the pressure sensor 18 detects that the pressure is too high, the controller controls the pressure balance valve to open, so that the evaporated gas enters the drying box 8 along the recovery pipe for drying. At the same time, the condenser 9 is controlled to open, so that the evaporated gas after dehydration enters the condenser 9 and condenses into liquid.

[0032] When liquid needs to be taken, the second solenoid valve 15 on the liquid outlet pipe 13 is controlled to open, and liquid is poured and taken through the liquid outlet pipe 13 .

[0033] When the liquid level sensor 20 detects that the liquid level is too low, the controller controls the first solenoid valve 14 on the liquid inlet pipe 12 to open, so as to replenish liquid into the inner tank 2 .

[0034] When the temperature sensor 17 detects that the temperature inside the tank is abnormal, the controller sends an alarm signal to prompt maintenance.

[0035] The utility model provides an outdoor low-temperature liquid storage tank. By arranging an evaporation gas processing component, the evaporated gas is effectively processed and recycled, thereby avoiding waste of liquid resources and at the same time avoiding damage to the environment caused by the evaporated gas. The temperature sensor, pressure sensor and liquid level sensor are respectively arranged to monitor the situation inside the storage tank in real time, and the intelligent controller is used to control timely warnings and maintenance processing, thereby improving work efficiency.

Claims

1. An outdoor low-temperature liquid storage tank, comprising an outer tank (1), an inner tank (2), an insulation layer located between the outer tank (1) and the inner tank (2), and a controller, wherein the outer tank (1) and the inner tank (2) are connected by a plurality of connecting ribs, and the outer tank (1) is supported by a plurality of supporting frames (6) arranged around the outer wall; characterized in that: The bottom of the outer tank (1) is respectively provided with a liquid inlet pipe (12) and a liquid outlet pipe (13) which are connected to the inner tank (2); the top of the outer tank (1) is provided with a recovery pipe (7) which is connected to the top of the inner tank (2); the other end of the recovery pipe (7) is connected to the evaporated gas treatment component; a pressure balance valve is provided at the inlet of the recovery pipe (7); the controlled end of the pressure balance valve is connected to the output end of the controller; the top of the inner tank (2) is respectively provided with a temperature sensor (17) and a pressure sensor (18); the inner tank (2) is also provided with a liquid level sensor (20); the output ends of the temperature sensor (17), the pressure sensor (18) and the liquid level sensor (20) are respectively connected to the input end of the controller.

2. An outdoor cryogenic liquid storage tank according to claim 1, characterized in that: The thermal insulation layer comprises a vacuum layer (3), an aerogel thermal insulation layer (4), and a reflective layer (5) which are arranged in sequence.

3. An outdoor cryogenic liquid storage tank according to claim 1, characterized in that: The evaporated gas processing assembly comprises a drying box (8) and a condenser (9) which are connected to a recovery pipe (7); the drying box (8) is mounted on the top of the condenser (9) via a mounting bracket (10) and is connected to the condenser (9) via a pipeline; the condenser (9) is connected to a liquid inlet pipe (12) via a return pipe (11); a desiccant for absorbing mixed moisture in the evaporated gas is installed inside the drying box (8); and the condenser (9) comprises an air compressor and a refrigerator.

4. An outdoor cryogenic liquid storage tank according to claim 1, characterized in that: A first solenoid valve (14) is installed on the liquid inlet pipe (12), and a second solenoid valve (15) is installed on the liquid outlet pipe (13). The controlled ends of the first solenoid valve (14) and the second solenoid valve (15) are respectively connected to the output end of the controller.

5. An outdoor cryogenic liquid storage tank according to claim 1, characterized in that: A sealing seat (16) is installed at the connection between the recovery pipe (7) and the surface of the outer tank to ensure the overall sealing of the tank body.

Images