CN218993824U - Oxygen recovery system - Google Patents
Oxygen recovery system Download PDFInfo
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- CN218993824U CN218993824U CN202320024112.5U CN202320024112U CN218993824U CN 218993824 U CN218993824 U CN 218993824U CN 202320024112 U CN202320024112 U CN 202320024112U CN 218993824 U CN218993824 U CN 218993824U
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- oxygen
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- heat exchanger
- recovery system
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 239000001301 oxygen Substances 0.000 title claims abstract description 93
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 93
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000007788 liquid Substances 0.000 claims abstract description 63
- 238000003860 storage Methods 0.000 claims abstract description 63
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 44
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910001882 dioxygen Inorganic materials 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 9
- 238000013016 damping Methods 0.000 claims description 6
- 239000002699 waste material Substances 0.000 abstract description 7
- 230000036284 oxygen consumption Effects 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000005868 electrolysis reaction Methods 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- SXGDIBYXFSKCRM-UHFFFAOYSA-L dilithium hydrogen carbonate hydroxide Chemical compound [OH-].[Li+].C([O-])(O)=O.[Li+] SXGDIBYXFSKCRM-UHFFFAOYSA-L 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002760 rocket fuel Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
- F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0012—Primary atmospheric gases, e.g. air
- F25J1/0017—Oxygen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0221—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using the cold stored in an external cryogenic component in an open refrigeration loop
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/42—Nitrogen
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model discloses an oxygen recovery system, and belongs to the field of resource recovery. The utility model provides an oxygen recovery system which aims at solving the problems that the existing oxygen cannot be effectively recovered and is wasted and large in waste. According to the utility model, the oxygen and the liquid nitrogen are conveyed into the heat exchanger, so that the oxygen reaches a liquefaction temperature point to partially liquefy the oxygen, the liquefied oxygen is further liquefied and enters the liquid storage tank for temporary storage, and finally enters the liquid oxygen storage tank to enter a subsequent oxygen utilization section, thereby realizing the recycling of the oxygen and effectively avoiding the waste of resources; simultaneously, the oxygen consumption cost is reduced; the whole system is simple in structure and does not need complex equipment and operation.
Description
Technical Field
The utility model belongs to the technical field of resource recovery, and particularly relates to an oxygen recovery system.
Background
Oxygen is widely recognized by people, and is mainly a basic element of survival, and the purified high-purity oxygen is widely applied and can be used for participating in a plurality of chemical reactions to produce various oxides. Oxygen is needed in all oxidation reaction and combustion processes, for example, sulfur, phosphorus and other impurities are removed in steelmaking, and the temperature of the oxygen and acetylene mixed gas is as high as 3500 ℃ in combustion, so that the oxygen and acetylene mixed gas is used for welding and cutting steel. Oxygen is required for glass manufacture, cement production, mineral calcination, and hydrocarbon processing. Liquid oxygen is also used as rocket fuel; can also be used for water quality treatment. At present, in the solar energy enterprises, in the single crystal silicon drawing production of main products, the solar energy enterprises use argon recovery equipment, hydrogen produced by water electrolysis hydrogen production equipment in the equipment is used by the argon recovery equipment, and high-purity oxygen produced by a water electrolysis device at the same time has the purity of 99.999 percent, and the purity can be up to 99.999 percent without using the high-purity oxygen as waste gas emptying treatment, so that the waste of resources is caused.
Corresponding improvements are made to the problems, such as China patent application No. CN202020855075.9, the publication date of which is 2021, 3 and 9, and the patent discloses an oxygen recovery system of an atmosphere furnace made of a positive electrode material, which comprises an atmosphere furnace main body, wherein the atmosphere furnace main body comprises an air inlet device and an air exhaust device; a water lithium eluting device, a filtering device, a recovered oxygen tank and an applied oxygen tank are also connected between the exhaust device and the air inlet device in sequence; the water-washing lithium eluting device comprises a water-washing tank and an overflow tank, wherein the water-washing tank and the overflow tank are connected with a sewage pump; the water-eluted lithium device and the filtering device are matched to remove dust and lithium hydroxide lithium carbonate with strong corrosiveness in kiln waste gas, and the recovered oxygen meets the requirements by matching the recovered oxygen tank and the applied oxygen tank. The disadvantage of this patent is that: the system has complex composition and high cost.
For another example, chinese patent application number CN202022193145.1, publication No. 2021, 6 and 22, discloses an oxygen recovery device in tail gas of a nitrogen making machine, which comprises a nitrogen making machine, wherein a vent valve and a muffler are arranged on a vent pipe of the nitrogen making machine, a first branch pipe and a second branch pipe are arranged on the vent pipe, a low-pressure tank is arranged on the first branch pipe, a high-pressure tank is arranged on the second branch pipe, a booster fan is arranged on an air outlet pipe of the low-pressure tank, and an outlet of the booster fan is connected with the high-pressure tank; the air outlet pipe of the high-pressure tank is provided with a pressure regulating control device, a pipeline behind the pressure regulating control device is connected with a combustion air pipeline, and the combustion air pipeline is provided with an air flow regulating valve; thereby improving the oxygen content of the combustion air, improving the combustion efficiency of the fuel gas, achieving the purposes of energy conservation and emission reduction. The disadvantage of this patent is that: although the annealing cost is effectively reduced, the parts are complicated, and the maintenance cost is high.
Disclosure of Invention
1. Problems to be solved
Aiming at the problems that the existing oxygen cannot be effectively recovered and is wasted, the utility model provides an oxygen recovery system. According to the utility model, the oxygen and the liquid nitrogen are conveyed into the heat exchanger, so that the oxygen reaches a liquefaction temperature point to partially liquefy the oxygen, the liquefied oxygen is further liquefied and enters the liquid storage tank for temporary storage, and finally enters the liquid oxygen storage tank to enter a subsequent oxygen utilization section, thereby realizing the recycling of the oxygen and effectively avoiding the waste of resources; simultaneously, the oxygen consumption cost is reduced; the whole system is simple in structure and does not need complex equipment and operation.
2. Technical proposal
In order to solve the problems, the utility model adopts the following technical scheme.
The utility model provides an oxygen recovery system, includes the cold box, and the cold box communicates with the device that produces oxygen, and the inside heat exchanger that is provided with of cold box, the oxygen export and the liquid storage tank intercommunication of heat exchanger bottom, the entry of heat exchanger communicates liquid nitrogen storage tank and original oxygen respectively, original oxygen is the device that produces oxygen and gets, and the liquid storage tank passes through pipeline and liquid oxygen storage tank intercommunication.
Still further, the liquid storage tank includes the casing, and the middle part of casing and the oxygen export intercommunication of heat exchanger bottom are provided with oxygen gas passage at the top of casing, and oxygen gas passage and heat exchanger intercommunication, the bottom of casing pass through pipeline and liquid oxygen storage tank intercommunication, and the liquid oxygen storage tank sets up outside the cold box.
Furthermore, a valve is arranged on the oxygen gas channel, and a pressure sensor for collecting pressure signals in the liquid storage tank is arranged on the oxygen gas channel.
Still further, the liquid nitrogen storage tank includes the jar body of storage liquid nitrogen, stretches out the pipe at jar body top from the jar internal portion, is connected with the conveyer pipe that carries liquid nitrogen to the heat exchanger on the pipe, is provided with liquid nitrogen concentration sensor on the conveyer pipe, and is provided with the motorised valve on the conveyer pipe.
Furthermore, a sealing ring is arranged at the joint of the pipe and the conveying pipe, and the sealing ring is also arranged along the circumferential direction of the pipe.
Furthermore, a damping spring is arranged at the bottom of the tank body, and universal wheels are arranged at the bottom of the damping spring.
Further, the heat exchanger is a plate heat exchanger.
Further, the heat preservation layer is filled in the cold box.
3. Advantageous effects
Compared with the prior art, the utility model has the beneficial effects that:
(1) According to the utility model, the oxygen and the liquid nitrogen are conveyed into the heat exchanger, so that the oxygen reaches a liquefaction temperature point to partially liquefy the oxygen, the liquefied oxygen is further liquefied and enters the liquid storage tank for temporary storage, and finally enters the liquid oxygen storage tank to enter a subsequent oxygen utilization section, thereby realizing the recycling of the oxygen and effectively avoiding the waste of resources; simultaneously, the oxygen consumption cost is reduced; the whole system has simple structure, does not need complex equipment and operation, and is easy to realize;
(2) According to the utility model, the liquid oxygen subjected to heat exchange by the heat exchanger enters the middle part of the shell of the liquid storage tank through the oxygen outlet of the heat exchanger, and meanwhile, the oxygen at the top of the shell is communicated with the heat exchanger, so that part of oxygen gas coming out from the outlet of the heat exchanger can be returned to the heat exchanger again to exchange heat with liquid nitrogen; liquid oxygen enters a liquid oxygen storage tank from the bottom of the shell through a pipeline for storage; different positions of the whole liquid storage tank are connected in different ways, so that smooth transfer of liquid oxygen is ensured; meanwhile, the pressure sensor arranged on the oxygen gas pipeline is convenient for monitoring the pressure in the liquid storage tank in real time, so that the safety is ensured;
(3) The liquid nitrogen storage tank is connected with the conveying pipe by adopting the pipe extending out of the top of the tank body from the inside of the tank body, so that the conveying of liquid nitrogen is realized, and the conveying pipe is provided with the liquid nitrogen concentration sensor for monitoring the liquid nitrogen concentration in the tank body in real time, so that the safety is improved; the arrangement of the electric valve can reduce the labor intensity of workers; the sealing rings at the joint and the sealing rings at the circumference of the pipe increase the overall tightness of the tank body and avoid the leakage of liquid nitrogen; the shock absorption spring at the bottom of the tank body effectively avoids the impact on the tank body in the carrying process, and the universal wheels are convenient for carrying the whole tank body, so that the labor intensity is reduced;
(4) The utility model adopts the plate heat exchanger to exchange the heat between the liquid nitrogen and the oxygen, the plate heat exchanger has high heat exchange efficiency and small heat loss, and the heat transfer coefficient of the plate heat exchanger is many times higher than that of the tube heat exchanger under the condition of the same pressure loss, thereby ensuring the heat exchange effect; meanwhile, the heat preservation layer in the cold box effectively reduces the loss of cold energy of equipment running at low temperature.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
In the figure: 1. a liquid nitrogen storage tank; 2. a cold box; 3. a heat exchanger; 4. a liquid storage tank; 5. a valve; 6. a pipe; 7. a liquid oxygen storage tank.
Detailed Description
The utility model is further described below in connection with specific embodiments and the accompanying drawings.
Example 1
As shown in FIG. 1, an oxygen recovery system comprises a cold box 2, wherein the cold box 2 is communicated with a device for generating oxygen, an insulation layer is filled in the cold box 2, and the insulation layer can be pearly-luster sand, so that the loss of cold quantity of equipment running in a low-temperature state is effectively reduced, the normal work of each part is ensured, and the maintenance cost is reduced. Specifically, the device for generating oxygen can be water electrolysis hydrogen production equipment, and the high-purity oxygen generated by the device is used as waste gas for treatment without use, so that resource waste is caused. Therefore, the oxygen generated by the water electrolysis hydrogen production equipment is communicated with the cold box 2 and enters the cold box 2. The inside heat exchanger 3 that is provided with of cold box 2, the oxygen export of heat exchanger 3 bottom and liquid storage tank 4 intercommunication, the entry of heat exchanger 3 communicates liquid nitrogen storage tank 1 and original oxygen respectively, original oxygen is the device that produces oxygen and gets. Specifically, the bottom of the heat exchanger 3 is provided with a liquid nitrogen inlet and an oxygen outlet, the liquid nitrogen inlet is communicated with the liquid nitrogen storage tank 1 through a pipeline 6, and the oxygen outlet is communicated with the liquid storage tank 4; the top of the heat exchanger 3 is provided with an original oxygen inlet and a nitrogen outlet, the original oxygen inlet is communicated with the water electrolysis hydrogen production equipment, and the nitrogen outlet is communicated with the storage equipment; and the inside nitrogen channel and the oxygen channel that are independent of each other that are equipped with of heat exchanger 3, and liquid nitrogen and original oxygen carry out the heat transfer through independent channel each other on one by one, and heat transfer effect is good and mutually noninterfere, and the composition can not take place to mix, guarantees purity. Preferably, the heat exchanger 3 in this embodiment adopts a plate heat exchanger, the plate heat exchanger has high heat exchange efficiency and small heat loss, and under the same pressure loss, the heat transfer coefficient of the plate heat exchanger is many times higher than that of the tube heat exchanger, so as to ensure the heat exchange effect. The liquid storage tank 4 is in communication with a liquid oxygen storage tank 7 via a conduit 6. The working principle of the system of the utility model is as follows: introducing high-purity oxygen generated by water electrolysis hydrogen production equipment into a cold box 2; after entering the cold box 2, the high-purity oxygen is subjected to heat exchange and temperature reduction through the heat exchanger 3 by utilizing the backflow liquid nitrogen supplied by the liquid nitrogen storage tank 1, so that the high-purity oxygen reaches a liquefaction temperature point (-158 ℃) to partially liquefy the high-purity oxygen gas; the liquefied high-purity oxygen is further liquefied and sent to a liquid storage tank 4; the liquefied high-purity oxygen is stored in the liquid storage tank 4, is sent out of the cold box 2 from the pipeline 6 at the bottom of the liquid storage tank 4, is sent into the liquid oxygen storage tank 7 for storage instead of or is sent through the liquid oxygen storage tank 7 to be sent into a subsequent working section. The whole system realizes the recycling of oxygen, reduces the exhaust emission and effectively avoids the waste of resources; simultaneously, the oxygen consumption cost is reduced; the whole system has simple structure, does not need complex equipment and operation, and is easy to realize.
Specifically, in this embodiment, the liquid storage tank 4 includes a housing, the middle part of the housing is communicated with an oxygen outlet at the bottom of the heat exchanger 3, an oxygen gas channel is arranged at the top of the housing, the oxygen gas channel is communicated with the heat exchanger 3, the bottom of the housing is communicated with the liquid oxygen storage tank 7 through a pipeline 6, and the liquid oxygen storage tank 7 is arranged outside the cold box 2. The liquid oxygen after heat exchange from the heat exchanger 3 enters the middle part of the shell, and in order to avoid that the liquid oxygen is doped with gaseous oxygen and enters the subsequent liquid oxygen storage tank 7 for storage, an oxygen gas channel is arranged at the top of the shell, so that the liquid oxygen doped with gaseous oxygen can enter the heat exchanger 3 from the channel to recover cold energy and reheat the cold energy into normal-temperature oxygen, and the normal-temperature oxygen is sent out of the cold box 2 for storage. And be provided with valve 5 on oxygen gas channel, control and adjust oxygen flow through valve 5 control, control liquid storage tank 4 pressure, and be provided with the pressure sensor that is used for gathering liquid storage tank 4 internal pressure signal on the oxygen gas channel, real-time supervision liquid storage tank 4 internal pressure signal further improves the security of whole process.
In the embodiment, the liquid nitrogen storage tank 1 comprises a tank body for storing liquid nitrogen, a pipe extending out of the top of the tank body from the inside of the tank body, a conveying pipe for conveying the liquid nitrogen to the heat exchanger 3 is connected to the pipe, a liquid nitrogen concentration sensor is arranged on the conveying pipe, an electric valve is arranged on the conveying pipe, and the conveying pipe is connected with the conveying pipe to realize the conveying of the liquid nitrogen, so that the liquid nitrogen storage tank is safe and easy to operate; the arrangement of the electric valve further reduces the labor intensity of workers; the arrangement of the liquid nitrogen concentration sensor further increases the safety of the liquid nitrogen conveying process. The sealing ring is arranged at the joint of the pipe and the conveying pipe, and the sealing ring is also arranged along the circumferential direction of the pipe, so that the sealing property of the whole liquid nitrogen storage tank 1 is improved, and the potential safety hazard that liquid nitrogen is easy to leak is effectively avoided. Furthermore, the damping springs are arranged at the bottoms of the tank bodies, and universal wheels are arranged at the bottoms of the damping springs, so that the tank bodies are easy to carry and are time-saving and labor-saving due to the arrangement of the universal wheels; the shock-absorbing spring is arranged to prevent the tank body from being impacted directly in the carrying process, so that the tank body is effectively protected, and the safety of the whole carrying process is improved.
The examples of the present utility model are merely for describing the preferred embodiments of the present utility model, and are not intended to limit the spirit and scope of the present utility model, and those skilled in the art should make various changes and modifications to the technical solution of the present utility model without departing from the spirit of the present utility model.
Claims (8)
1. An oxygen recovery system, characterized by: the device comprises a cold box (2), wherein the cold box (2) is communicated with a device for generating oxygen, a heat exchanger (3) is arranged in the cold box (2), an oxygen outlet at the bottom of the heat exchanger (3) is communicated with a liquid storage tank (4), an inlet of the heat exchanger (3) is respectively communicated with a liquid nitrogen storage tank (1) and original oxygen, the original oxygen is obtained by the device for generating oxygen, and the liquid storage tank (4) is communicated with a liquid oxygen storage tank (7) through a pipeline (6).
2. An oxygen recovery system according to claim 1, wherein: the liquid storage tank (4) comprises a shell, the middle part of the shell is communicated with an oxygen outlet at the bottom of the heat exchanger (3), an oxygen gas channel is arranged at the top of the shell and is communicated with the heat exchanger (3), the bottom of the shell is communicated with the liquid oxygen storage tank (7) through a pipeline (6), and the liquid oxygen storage tank (7) is arranged outside the cold box (2).
3. An oxygen recovery system according to claim 2, wherein: the oxygen gas channel is provided with a valve (5), and the oxygen gas channel is provided with a pressure sensor for collecting pressure signals in the liquid storage tank (4).
4. An oxygen recovery system according to claim 1, wherein: the liquid nitrogen storage tank (1) comprises a tank body for storing liquid nitrogen, a pipe extending out of the top of the tank body is connected with a conveying pipe for conveying the liquid nitrogen to the heat exchanger (3), a liquid nitrogen concentration sensor is arranged on the conveying pipe, and an electric valve is arranged on the conveying pipe.
5. An oxygen recovery system according to claim 4, wherein: the joint of the pipe and the conveying pipe is provided with a sealing ring, and the sealing ring is also arranged along the circumferential direction of the pipe.
6. An oxygen recovery system according to claim 4 or 5, wherein: the bottom of the tank body is provided with a damping spring, and the bottom of the damping spring is provided with a universal wheel.
7. An oxygen recovery system according to claim 1, wherein: the heat exchanger (3) is a plate heat exchanger.
8. An oxygen recovery system according to claim 1, wherein: the inside of the cold box (2) is filled with an insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320024112.5U CN218993824U (en) | 2023-01-05 | 2023-01-05 | Oxygen recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320024112.5U CN218993824U (en) | 2023-01-05 | 2023-01-05 | Oxygen recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218993824U true CN218993824U (en) | 2023-05-09 |
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ID=86224990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320024112.5U Active CN218993824U (en) | 2023-01-05 | 2023-01-05 | Oxygen recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218993824U (en) |
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2023
- 2023-01-05 CN CN202320024112.5U patent/CN218993824U/en active Active
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