A thousand-meter-level hydrogen and oxygen saturation diving external circulation environmental control system

Abstract

The present invention relates to a kilometer-level hydrogen-oxygen saturated diving external circulation environmental control system, which includes a high-pressure chamber. The high-pressure chamber and a circulation tank form a circulation system through an air outlet pipeline and an air inlet pipeline. Inside the circulation tank, a filter, a CO2 adsorber, an activated carbon adsorber, a condenser, a heat exchanger, and an explosion-proof blower are sequentially arranged along the gas flow direction. A water collecting tank is arranged inside the circulation tank, and the water collecting tank is connected to a water-vapor separation tank through a water and gas pipeline. A cleaning pipeline is arranged on the air outlet pipeline, and a nitrogen cylinder is installed at the end of the cleaning pipeline. A series-connected hydrogen analyzer, oxygen analyzer, and nitrogen analyzer are connected to the circulation tank through a detection air inlet pipeline. All connection parts adopt sealed connections.

Description

Technical Field

[0001] The invention relates to a kilometer-level hydrogen-oxygen saturation diving external circulation environmental control system, belonging to the technical field of hyperbaric chamber environmental control. Background Art

[0002] The environmental control requirements for the saturation diving living chamber are very high. CO2, humidity and temperature will have an impact on the diver's body. A safe and reliable environmental control system is essential for the saturation diving living chamber.

[0003] The kilometer-level diving chamber contains hydrogen and oxygen or a mixture of hydrogen, helium and oxygen, in which the oxygen concentration does not exceed 2% to ensure that the hydrogen will not burn. Hydrogen is used in the kilometer-level diving chamber because the density of hydrogen is only half of that of helium, so it has better fluidity and lower breathing resistance, making it more suitable for kilometer-level saturation diving. However, hydrogen is prone to explosion, so it is key to reasonably control the concentration of hydrogen. Technicians in this field have been studying how to ensure the control system of the kilometer-level diving chamber environment control. The main purpose is to provide a safe and effective environment control system for the living chamber of the kilometer-level hydrogen and oxygen saturation diving to remove CO2, remove odors, dehumidify, and control temperature. Summary of the invention

[0004] The present invention provides a kilometer-level hydrogen and oxygen saturation diving external circulation environmental control system to remove CO2 and odor in a hyperbaric chamber.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a kilometer-level hydrogen and oxygen saturation diving external circulation environmental control system, including a high-pressure chamber, which is special in that the high-pressure chamber forms a circulation system with a circulation tank through an outlet pipeline and an inlet pipeline; a filter, a CO2 adsorber, an activated carbon adsorber, a condenser, a heat exchanger and an explosion-proof blower are arranged in sequence in the circulation tank along the gas flow direction; a water collecting tank is arranged in the circulation tank for collecting water droplets generated by the condenser, and a water-gas pipeline connected to a water-gas separation tank is arranged at the bottom of the water collecting tank; a bypass cleaning pipeline is arranged on the outlet pipeline, a nitrogen bottle is installed at the end of the cleaning pipeline, and a pressure reducing valve Q, a ball valve Q and a flow meter are also arranged on the cleaning pipeline; a hydrogen gas is connected in series with the gas outlet pipeline. The analyzer, oxygen analyzer and nitrogen analyzer are connected to the circulation tank through the detection air inlet pipeline, and are connected to the water and gas pipeline through the detection air outlet pipeline. The detection air inlet pipeline is also provided with a circulation tank analysis valve, the water and gas pipeline is provided with a drain valve, and the detection outlet pipeline is provided with a ball valve; all connections are sealed; the explosion-proof blower rotates to suck the hydrogen and oxygen mixture in the high-pressure cabin, and the mixture passes through the filter, CO2 adsorber and activated carbon adsorber to remove CO2 and odor in the mixture, and the gas phase water vapor is converted into liquid phase water droplets through the condenser, which fall into the sump to reduce the humidity in the high-pressure mixed gas, and then passes through the heat exchanger to heat the dry mixed gas, and finally transported to the high-pressure cabin through the explosion-proof blower.

[0006] The explosion-proof blower rotates to suck the hydrogen and oxygen mixture in the living cabin. The mixture passes through the filter, CO2 adsorber and activated carbon filter to remove CO2 and various odors in the mixture. Then it passes through the condenser (which converts gaseous water vapor into liquid water droplets, which fall into the sump to reduce the humidity in the high-pressure mixed gas), and then passes through the heat exchanger (which heats the dry mixed gas). Finally, it is transported to the living cabin through the blower. This cycle is repeated to remove CO2, remove odors, dehumidify and regulate the temperature in the living cabin.

[0007] On the basis of the above technical solution, in order to achieve the convenience of use and the stability of the equipment, the present invention can also make the following improvements to the above technical solution:

[0008] Furthermore, a one-way valve C, a high-pressure valve C and an inlet temperature sensor C are installed on the gas outlet pipeline, and the inlet temperature sensor C is installed at the front end of the circulation tank inlet.

[0009] Furthermore, the circulation tank is provided with a pressure gauge and a safety valve, and the safety valve is connected to the gas recovery device through a pipeline.

[0010] Furthermore, a bypass pipeline is provided on the air intake pipeline to connect to the gas recovery device, and a tank washing valve P and a one-way valve P are provided on the bypass pipeline.

[0011] Furthermore, the water vapor separation tank is provided with a pipeline connected to the gas recovery device, a pipeline connected to the detection air intake pipeline, and a water drain valve.

[0012] Furthermore, the air intake pipeline is provided with a high-pressure ball valve J, an outlet temperature sensor J, a one-way valve J and a flame arrester; the outlet temperature sensor J is installed at the outlet end of the circulation tank.

[0013] The circulation tank is arranged outside the high pressure chamber.

[0014] The advantages of the present invention are:

[0015] The system uses an extra-cabin circulation system and is equipped with a flame arrester in the pipeline, which minimizes potential safety hazards, reduces cabin noise, and improves the comfort level in the high-pressure cabin.

[0016] The external circulation environmental control system is sealed in a separate circulation tank, isolating the external connection to ensure the safety inside and outside the cabin;

[0017] The nitrogen tank washing operation is equipped with a gas analyzer to minimize the potential safety hazards of tank opening and ensure the air quality in the high-pressure chamber;

[0018] The high-power explosion-proof blower can drive the circulation of high-pressure and strong mixed gas more efficiently, improving the quality of the mixed gas in the cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This application provides a structural schematic diagram of a kilometer-level hydrogen and oxygen saturation diving external circulation environmental control system.

[0020] The reference numerals are as follows: 1. Check valve C; 2. High pressure valve C; 3. Circulation tank; 4. Pressure gauge; 5. Safety valve; 6. Filter; 7. CO2 adsorber; 8. Activated carbon adsorber; 9. Condenser; 10. Heat exchanger; 11. Explosion-proof blower; 12. High pressure ball valve J; 13. Flame arrester; 14. Check valve; 15. Gas recovery valve; 16. Inlet temperature sensor C; 17. Outlet temperature sensor J; 18. Sump; 19. Drain valve; 20. Water vapor separation tank; 21. Drain valve; 22. Check valve P; 23. Nitrogen cylinder; 24. Pressure reducing valve; 25. Ball valve Q; 26. Tank washing valve P; 27. Circulation tank analysis valve; 28. Hydrogen analyzer; 29. ​​Ball valve; 30. Pressure sensor; 31. Flow meter; 32. Drain tank analysis valve; 33. Oxygen analyzer; 34. Check valve J; 35. Air discharge valve; 36. Nitrogen analyzer; 101. Gas recovery device. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] Combined with Figure 1 A kilometer-level hydrogen-oxygen saturation diving external circulation environmental control system includes a hyperbaric chamber 100, which forms a circulation system with a circulation tank 3 through an air outlet pipeline and an air inlet pipeline.

[0023] The outlet pipe is equipped with a one-way valve C1, a high-pressure valve C2 and an inlet temperature sensor C16. The inlet temperature sensor C16 is installed at the front end of the inlet of the circulation tank 3.

[0024] The air intake pipeline is provided with a high-pressure ball valve J12, a one-way valve J34, an outlet temperature sensor J17 and a flame arrester 13. A bypass pipeline is provided on the air intake pipeline to connect with the gas recovery device 101. The bypass pipeline is provided with a tank washing valve P26 and a one-way valve P22. The outlet temperature sensor J17 is close to the outlet end of the circulation tank 3.

[0025] A filter 6, a CO2 adsorber 7, an activated carbon adsorber 8, a condenser 9, a heat exchanger 10 and an explosion-proof blower 11 are sequentially arranged in the circulation tank 3 along the gas flow direction; a water collecting tank 18 for collecting water droplets generated by the condenser 9 is arranged in the circulation tank 3, and a water-gas pipeline connected to the water-gas separation tank 20 is arranged at the bottom of the water collecting tank 18; a pressure gauge 4 and a safety valve 5 are arranged on the circulation tank 3, and the safety valve 5 is connected to the gas recovery device 101 through a pipeline;

[0026] A cleaning pipeline is provided on the gas outlet pipeline, a nitrogen bottle 23 is installed at the end of the cleaning pipeline, and a pressure reducing valve Q 24, a ball valve Q 25 and a flow meter 31 are also provided on the cleaning pipeline;

[0027] The hydrogen analyzer 28, oxygen analyzer 33 and nitrogen analyzer 36 connected in series are connected to the circulation tank 3 through the detection air inlet pipeline, and are connected to the water and gas pipeline through the detection air outlet pipeline. The detection air inlet pipeline is also provided with a circulation tank analysis valve 27, the water and gas pipeline is provided with a drain valve 19, and the detection air outlet pipeline is provided with a ball valve 29; all connections are sealed;

[0028] The explosion-proof blower 11 rotates to suck the hydrogen-oxygen mixed gas in the high-pressure chamber. The mixed gas passes through the filter 6, the CO2 adsorber 7 and the activated carbon adsorber 8 to remove CO2 and odor in the mixed gas. The gas phase water vapor is converted into liquid phase water droplets through the condenser 9 and falls into the water collection tank 18 to reduce the humidity in the high-pressure mixed gas. The dry mixed gas is then heated through the heat exchanger 10 and finally transported to the high-pressure chamber through the explosion-proof blower 11.

[0029] The water vapor separation tank 20 is provided with a pipeline connected to the gas recovery device 101 , a pipeline connected to the detection air intake pipeline, and a water drain valve 21 .

[0030] The above system works as follows:

[0031] Gas circulation device: The explosion-proof blower 11 rotates, driving the gas in the living cabin to pass through the one-way valve C1 and the high-pressure valve C2 in sequence, and enter the circulation tank 3. The gas passes through the filter 6, CO2 adsorber 7, activated carbon adsorber 8, condenser 9, and heat exchanger 10 in sequence, and then is blown out of the circulation tank 3 by the explosion-proof blower 11, and returns to the living cabin through the high-pressure ball valve J12, the one-way valve J34, and the flame arrester 13. The reciprocating cycle realizes the functions of removing CO2, removing odor, dehumidifying, and controlling the temperature of the gas in the living cabin. The inlet temperature sensor C16 and the outlet temperature sensor J17 are installed at the front and rear ends of the circulation tank to indicate the temperature; the pressure gauge 4, the safety valve 5 and the pressure sensor 30 are installed on the circulation tank to indicate the pressure in the tank and protect safety. The discharge port of the safety valve 5 cannot be directly discharged to the atmosphere, and needs to pass through the one-way valve 14 and the gas recovery valve 15 to enter the gas recovery device 101. The hot and cold water inlets and outlets are connected to the hot and cold water pipes outside. The temperature in the living cabin is regulated and controlled through a separate system, which will not be elaborated here.

[0032] Condensate discharge: The gas in the tank passes through the condenser 9, and the gaseous water vapor condenses into liquid water droplets, which fall into the water collecting tank 18. The drain valve 19 is opened regularly, and the condensed water enters the water vapor separation tank 20. The condensed water discharge pipeline needs to have a certain slope, and the position of the water vapor separation tank 20 is the lowest point. Only after the tank washing is completed can the water valve at the bottom of the water vapor separation tank 20 be opened for drainage.

[0033] Tank cleaning and filter replacement: The filters here include filter 6, CO2 adsorber 7, and activated carbon adsorber 8. In order to improve the air quality in the living cabin, CO2 adsorber 7 and activated carbon adsorber 8 need to be replaced regularly. Due to the high concentration of hydrogen in the tank, the tank needs to be cleaned before replacing the filter. Only after the tank cleaning is completed and the hydrogen concentration analysis is performed to ensure safety, can the filter be replaced.

[0034] The tank washing operation process is: first open the standby external circulation environmental control system, then close the high-pressure ball valve J12 of this system and then close the high-pressure valve C2, disconnect the environmental control system and the living cabin, open the tank washing valve P26, and the high-pressure gas in the tank flows to the gas recovery device 101 through the one-way valve P22, observe the pressure change in the tank, and when the pressure no longer decreases, open the gas cylinder valve of the high-pressure nitrogen cylinder 23, adjust the pressure reducing valve 24, and adjust the pressure to 0.1MPa higher than the pressure in the tank. It can be adjusted appropriately according to actual conditions, open the ball valve Q25, and according to the indication of the flow meter 31, ensure that at least twice the tank volume of nitrogen flows into the circulation tank 3, then close the ball valve Q25, open the circulation tank analysis valve 27, detect the hydrogen content in the tank to be less than 2%, then close the tank washing valve P26, open the drain valve 19, and clean the water vapor separation tank 20. After cleaning, open the drain tank analysis valve 32 to detect the hydrogen concentration in the water tank. After passing the test, open the drain valve 21 to waterproof.

[0035] After replacing the filter, the circulation tank 3 is cleaned for the second time. The oxygen concentration in the tank is detected by the oxygen analyzer 33 and is not more than 2%. At this time, the gas from the cleaning can be directly discharged through the air discharge valve 35.

[0036] The external circulation environmental control system is reconnected to the living cabin: close the valve for tank washing operation, open the high-pressure valve C2 first, and use the mixed gas in the living cabin to wash and fill the circulation tank 3 for the third time. At this time, the gas discharged from the tank washing operation needs to enter the gas recovery device 101. After the nitrogen concentration after tank washing is detected to be lower than 0.1%, close the valve for tank washing operation, use the mixed gas in the living cabin to slowly pressurize the circulation tank 3 until the pressure in the tank is consistent with the pressure in the living cabin, and then open the high-pressure ball valve J12. After the connection is completed, turn on the power to turn on the blower and the environmental control system can be used.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A kilometer-level hydrogen-oxygen saturation diving external circulation environmental control system, comprising a hyperbaric chamber (100), characterized in that: The high-pressure chamber (100) forms a circulation system with a circulation tank (3) through an air outlet pipeline and an air inlet pipeline; a filter (6), a CO2 adsorber (7), an activated carbon adsorber (8), a condenser (9), a heat exchanger (10) and an explosion-proof blower (11) are sequentially arranged in the circulation tank (3) along the gas flow direction; a water collecting tank (18) for collecting water droplets generated by the condenser (9) is arranged in the circulation tank (3), and a water-gas pipeline connected to a water-gas separation tank (20) is arranged at the bottom of the water collecting tank (18); a bypass cleaning pipeline is arranged on the air outlet pipeline, a nitrogen bottle (23) is installed at the end of the cleaning pipeline, and a pressure reducing valve Q (24) and a ball valve are also arranged on the cleaning pipeline. Q (25) and flow meter (31); the hydrogen analyzer (28), oxygen analyzer (33) and nitrogen analyzer (36) connected in series are connected to the circulation tank (3) through the detection air inlet pipeline, and are connected to the water gas pipeline through the detection air outlet pipeline; all connections are sealed; the explosion-proof blower (11) rotates to suck the hydrogen and oxygen mixed gas in the high-pressure chamber, and the mixed gas passes through the filter (6), CO2 adsorber (7) and activated carbon adsorber (8), and the gas phase water vapor is converted into liquid phase water droplets through the condenser (9), and falls into the water collection tank (18), and then passes through the heat exchanger (10) to heat the dry mixed gas, and finally transported to the high-pressure chamber through the explosion-proof blower (11); A bypass pipeline is provided on the air intake pipeline to communicate with the gas recovery device, and a tank washing valve P (26) and a one-way valve P (22) are provided on the bypass pipeline; The water vapor separation tank (20) is provided with a pipeline connected to the gas recovery device (101), a pipeline connected to the detection air intake pipeline, and a water drain valve (21).

2. The kilometer-level hydrogen and oxygen saturation diving external circulation environmental control system according to claim 1 is characterized in that: The gas outlet pipeline is installed with a one-way valve C (1), a high-pressure valve C (2) and an inlet temperature sensor C (16), and the inlet temperature sensor C (16) is installed at the front end of the inlet of the circulation tank (3).

3. The kilometer-level hydrogen and oxygen saturation diving external circulation environmental control system according to claim 1 or 2 is characterized in that: The circulation tank (3) is provided with a pressure gauge (4) and a safety valve (5), and the safety valve (5) is connected to the gas recovery device through a pipeline.

4. The kilometer-level hydrogen and oxygen saturation diving external circulation environmental control system according to claim 1 is characterized in that: The air intake pipeline is provided with a high-pressure ball valve J (12), an outlet temperature sensor J (17), a one-way valve J (34) and a flame arrester (13); the outlet temperature sensor J (17) is installed at the outlet end of the circulation tank (3).

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