CN220926279U - Helium purification system - Google Patents
Helium purification system Download PDFInfo
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- CN220926279U CN220926279U CN202322689630.1U CN202322689630U CN220926279U CN 220926279 U CN220926279 U CN 220926279U CN 202322689630 U CN202322689630 U CN 202322689630U CN 220926279 U CN220926279 U CN 220926279U
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- Prior art keywords
- helium
- dehydrogenation
- primary
- purification system
- tower
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- 239000001307 helium Substances 0.000 title claims abstract description 97
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 97
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 238000000746 purification Methods 0.000 title claims abstract description 37
- 238000006356 dehydrogenation reaction Methods 0.000 claims abstract description 77
- 238000001179 sorption measurement Methods 0.000 claims abstract description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 239000010865 sewage Substances 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 25
- 238000001816 cooling Methods 0.000 claims description 13
- 230000008929 regeneration Effects 0.000 claims description 10
- 238000011069 regeneration method Methods 0.000 claims description 10
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 4
- 229910052754 neon Inorganic materials 0.000 abstract description 4
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 150000002371 helium Chemical class 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Separation Of Gases By Adsorption (AREA)
Abstract
The utility model discloses a helium purification system, which comprises a primary dehydrogenation device, a secondary dehydrogenation device and a sewage disposal system which are connected with each other through pipelines; the dehydrogenation device of the multistage dehydrogenation reactor is adopted, the temperature and the stage number of the dehydrogenation reaction are controlled by controlling the amount of oxygen, so that the possibility of explosion is further prevented, the safety is higher, meanwhile, the dehydrogenation reactor is provided with a heating device, the preheating temperature required before the reaction can be accurately controlled, the reaction efficiency is improved, the low-temperature adsorption denitrification and the neon removal are carried out in a liquid nitrogen storage tank, the size of an adsorption tower can be effectively reduced, and the effect of completely removing impurity components is achieved.
Description
Technical Field
The utility model belongs to the field of helium purification, and particularly relates to a helium purification system.
Background
Helium is an extremely light, colorless, odorless, nontoxic, and nonflammable monoatomic inert gas. Helium has the lowest boiling point of all known gases, and it liquefies at-268.934 ℃ (4.18K), approaching absolute zero-273.15 ℃, the one that is the most difficult gas found by humans.
At present, helium purification processes at home and abroad are various, and main methods include a low-temperature condensation method, a membrane separation method, an adsorption method, an absorption method, a diffusion method and the like. The more economical and practical helium purification process is more difficult, and a lower separation temperature is needed to obtain helium with the purity of 99.999 percent, but the energy consumption of the unit refrigerating capacity is increased sharply along with the continuous reduction of the refrigerating temperature; meanwhile, the content of hydrogen in the raw gas of the part of domestic gas fields is relatively high, so that equipment hydrogen loss, hydrogen explosion, reactor overtemperature, catalyst sintering and the like are easily caused by hydrogen enrichment, and potential safety hazards exist.
Chinese patent publication No. CN104176717B discloses a helium recovery purifying apparatus comprising: a filter; a chemical adsorption device; a component analysis device; adding a gas tank; a heater; a catalytic system; a cooler; a first purification system; a coarse helium cooler; a rectifying tower; a second purification system; and a helium storage tank, which can be used for recycling the industrial waste gas containing helium, so that the purity of the helium is improved, and pure helium, high-purity helium and ultra-pure helium products can be obtained through deep purification.
The technical scheme has the following defects:
in order to meet the purity of helium, the refrigeration temperature is required to be continuously reduced, the energy consumption of unit refrigeration capacity is high, and hydrogen enrichment is easy to occur, so that certain potential safety hazards exist.
Disclosure of utility model
In view of the above drawbacks, the present utility model provides a helium purification system comprising a primary dehydrogenation device, a secondary dehydrogenation device and a blowdown system that are connected to each other by pipes;
The primary dehydrogenation device comprises a primary dehydrogenation reactor, a primary dehydrogenation tower heat exchanger, a primary dehydrogenation tower cooler and a primary dehydrogenation tower separator which are connected in sequence;
The secondary dehydrogenation device comprises a secondary dehydrogenation reactor, a secondary dehydrogenation tower cooler, a helium buffer tank, a diaphragm compressor, a helium dehydration tower, a helium regenerated gas heater, a helium purification heat exchanger and a helium purification device which are connected in sequence.
Further, the first-stage dehydrogenation reactor and the second-stage dehydrogenation reactor are respectively provided with a heating device for preheating, and are respectively provided with a controller and a temperature sensor for controlling the temperature of the heating device.
Through the technical scheme, the preheating temperature required before the reaction can be accurately controlled, and the reaction efficiency is improved.
Further, the primary dehydrogenation tower cooler and the secondary dehydrogenation tower cooler are both communicated with cooling water for cooling.
Through the technical scheme, the cooling device is used for being input into the two coolers to perform cooling operation.
Further, the helium purification device comprises a cryogenic helium purification skid and two PSA adsorption towers.
Through the technical scheme, the low-temperature helium purification sled can carry out gas-liquid separation, and the PSA adsorption tower is used for removing a small amount of impurities such as nitrogen, neon and the like in helium.
Further, a plurality of groups of helium cooling and separating devices are arranged in the secondary dehydrogenation device, and each group of helium cooling and separating device comprises a helium regeneration gas cooler and a helium regeneration gas separator communicated with the helium regeneration gas cooler.
Through the technical scheme, the gas mixed after treatment is recycled.
Further, the primary dehydrogenation device and the secondary dehydrogenation device are both led into the sewage disposal system through pipelines.
Through the technical scheme, the moisture generated in the dehydrogenation process is discharged.
Further, the inside of the cryogenic helium purification skid is filled with liquid nitrogen.
Through the technical scheme, helium separation and PSA adsorption processes are in a low-temperature state, and adsorption capacity is improved.
Compared with the prior art, the utility model has the following beneficial effects:
1. The dehydrogenation device of the multistage dehydrogenation reactor is adopted, the temperature and the stage number of the dehydrogenation reaction are controlled by controlling the amount of oxygen, so that the possibility of explosion is further prevented, the safety is higher, and meanwhile, the dehydrogenation reactor is provided with the heating device, so that the preheating temperature required before the reaction can be accurately controlled, and the reaction efficiency is improved;
2. The size of the adsorption tower can be effectively reduced and the effect of completely removing impurity components can be achieved by adopting the low-temperature adsorption denitrification and neon removal in the liquid nitrogen storage tank.
Drawings
FIG. 1 is a schematic flow chart of the dehydrogenation process according to the present utility model.
In the figure: 1. a primary dehydrogenation tower heat exchanger; 2. a primary dehydrogenation reactor; 3. a primary dehydrogenation tower cooler; 4. a primary dehydrogenation column separator; 5. a secondary dehydrogenation reactor; 6. a secondary dehydrogenation column cooler; 7. a helium buffer tank; 8. a diaphragm compressor; 9. helium dehydrating tower; 10. a helium regeneration gas heater; 11. a helium purification heat exchanger; 12. helium purification device; 13. a helium regenerated gas air cooler; 14. helium regeneration gas separator.
Detailed Description
In order to facilitate an understanding of the utility model, the device of the utility model will be described more fully below with reference to the accompanying drawings. Examples of the apparatus are given in the accompanying drawings. The apparatus may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples
As shown in fig. 1, the present embodiment provides a helium purification system, comprising a primary dehydrogenation device, a secondary dehydrogenation device and a sewage system which are connected with each other through a pipeline, wherein the primary dehydrogenation device comprises a primary dehydrogenation reactor 2, a primary dehydrogenation tower heat exchanger 1, a primary dehydrogenation tower cooler 3 and a primary dehydrogenation tower separator 4 which are connected in sequence; the secondary dehydrogenation device comprises a secondary dehydrogenation reactor 5, a secondary dehydrogenation tower cooler 6, a helium buffer tank 7, a diaphragm compressor 8, a helium dehydration tower 9, a helium regenerated gas heater 10, a helium purification heat exchanger 11 and a helium purification device 12 which are connected in sequence;
The inside of second grade dehydrogenation unit is equipped with multiunit helium cooling separator, and every helium cooling separator of group all includes helium regeneration gas air cooler 13 and rather than the helium regeneration gas separator 14 that is linked together, and diaphragm compressor 8 and helium dehydration tower 9 department all are linked together and are had helium cooling separator, and first order dehydrogenation unit and second grade dehydrogenation unit all import sewage disposal system through the pipeline, sewage disposal system respectively with two helium cooling separator intercommunication of group, it is to be noted that, first order dehydrogenation tower separator 4 import sewage disposal system through the pipeline, handle the liquid after the gas-liquid separation.
The crude helium purification procedure is as follows:
The crude helium with the helium concentration of about 60 percent enters a first-stage dehydrogenation reactor 2 after being preheated by a first-stage dehydrogenation tower heat exchanger 1, and reacts with oxygen (air) to generate water (the oxygen is respectively supplied to the first-stage dehydrogenation reactor 2 and a second-stage dehydrogenation reactor 5 through pipelines) under the action of a catalyst, so as to achieve the purpose of dehydrogenation, the dehydrogenated helium enters a first-stage dehydrogenation tower separator 4 for gas-liquid separation after being cooled by the first-stage dehydrogenation tower heat exchanger 1 and a first-stage dehydrogenation tower cooler 3 in sequence (liquid is gathered into a sewage disposal system through pipelines), the crude helium after water separation enters the second-stage dehydrogenation reactor 5 for complete dehydrogenation, the dehydrogenated helium enters a helium buffer tank 7 after being cooled by a second-stage dehydrogenation tower cooler 6, after water diversion and buffering, the helium enters a diaphragm compressor 8 to be pressurized (meanwhile, a sewage disposal system collects liquid to be pressurized), the pressurized helium enters a helium dehydrating tower 9 and moisture in the helium is removed to about 1ppm (the moisture is treated by a helium cooling separation device, the gas flows back into a helium buffer tank 7 through a pipeline, the liquid is discharged into the sewage disposal system to be recycled), the separated helium is firstly cooled by a helium regenerated gas heater 10 and then enters a helium purification device 12 consisting of a low-temperature helium purification sled and two PSA adsorption towers (PSA is a gas adsorption separation technology, the adsorption and desorption processes of the gas are realized by changing the pressure), and the helium purification sled is filled with liquid nitrogen, so that the two PSA adsorption towers are in a low-temperature state, and the adsorption capacity is improved. Helium enters a low-temperature helium purification skid and then is subjected to gas-liquid separation, and the separated helium enters two sets of PSA adsorption towers to remove a small amount of nitrogen, neon and other impurities in the helium, so that 99.999% of high-purity helium is obtained.
It should be noted that the structure of the present utility model may be implemented in many different forms, and is not limited to the embodiments, and any equivalent transformation made by those skilled in the art using the present specification and the accompanying drawings, or direct or indirect application in other related technical fields, such as loading and unloading of other articles, are included in the protection scope of the present utility model.
Claims (7)
1. A helium purification system, characterized by: comprises a primary dehydrogenation device, a secondary dehydrogenation device and a sewage disposal system which are connected with each other through pipelines;
The primary dehydrogenation device comprises a primary dehydrogenation reactor, a primary dehydrogenation tower heat exchanger, a primary dehydrogenation tower cooler and a primary dehydrogenation tower separator which are connected in sequence;
The secondary dehydrogenation device comprises a secondary dehydrogenation reactor, a secondary dehydrogenation tower cooler, a helium buffer tank, a diaphragm compressor, a helium dehydration tower, a helium regenerated gas heater, a helium purification heat exchanger and a helium purification device which are connected in sequence.
2. A helium purification system as set forth in claim 1 wherein: the primary dehydrogenation reactor and the secondary dehydrogenation reactor are respectively provided with a heating device for preheating, and are arranged on a controller and a temperature sensor for controlling the temperature of the heating device.
3. A helium purification system as set forth in claim 1 wherein: the primary dehydrogenation tower cooler and the secondary dehydrogenation tower cooler are both communicated with cooling water for cooling.
4. A helium purification system as set forth in claim 1 wherein: the helium purifying device comprises a low-temperature helium purifying pry and two PSA adsorption towers.
5. A helium purification system as set forth in claim 1 wherein: and a plurality of groups of helium cooling and separating devices are arranged in the secondary dehydrogenation device, and each group of helium cooling and separating device comprises a helium regeneration gas cooler and a helium regeneration gas separator communicated with the helium regeneration gas cooler.
6. A helium purification system as set forth in claim 1 wherein: the primary dehydrogenation device and the secondary dehydrogenation device are both led into the sewage disposal system through pipelines.
7. A helium purification system as set forth in claim 4 wherein: the inside of the cryogenic helium purification skid is filled with liquid nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322689630.1U CN220926279U (en) | 2023-10-08 | 2023-10-08 | Helium purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322689630.1U CN220926279U (en) | 2023-10-08 | 2023-10-08 | Helium purification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220926279U true CN220926279U (en) | 2024-05-10 |
Family
ID=90938719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322689630.1U Active CN220926279U (en) | 2023-10-08 | 2023-10-08 | Helium purification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220926279U (en) |
-
2023
- 2023-10-08 CN CN202322689630.1U patent/CN220926279U/en active Active
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| GR01 | Patent grant |