CN220205422U - Nitrogen recovery system for concentration tower - Google Patents
Nitrogen recovery system for concentration tower Download PDFInfo
- Publication number
- CN220205422U CN220205422U CN202321676141.6U CN202321676141U CN220205422U CN 220205422 U CN220205422 U CN 220205422U CN 202321676141 U CN202321676141 U CN 202321676141U CN 220205422 U CN220205422 U CN 220205422U
- Authority
- CN
- China
- Prior art keywords
- pipe
- air inlet
- nitrogen
- electric heater
- concentration tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 68
- 238000011084 recovery Methods 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 31
- 230000001105 regulatory effect Effects 0.000 claims description 23
- PDEXVOWZLSWEJB-UHFFFAOYSA-N krypton xenon Chemical compound [Kr].[Xe] PDEXVOWZLSWEJB-UHFFFAOYSA-N 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 4
- 230000006641 stabilisation Effects 0.000 abstract description 4
- 238000011105 stabilization Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 229910052743 krypton Inorganic materials 0.000 description 2
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model discloses a nitrogen recovery system for a concentration tower, which comprises a concentration tower body, a first electric heater, a second electric heater and a buffer tank, wherein an evaporator is arranged at the top of the concentration tower body, a condenser is arranged at the top of the concentration tower body, a first exhaust pipe is connected between an air outlet of the evaporator and an air inlet of the second electric heater, and a second exhaust pipe is connected between an air outlet of the condenser and the first exhaust pipe. When purifying krypton-xenon gas, the low-temperature nitrogen exhausted by the evaporator and the condenser is collected in the first exhaust pipe and enters the second electric heater, the second electric heater can heat the low-temperature nitrogen to normal temperature, the normal-temperature nitrogen is exhausted into the buffer tank through the gas pipe, and is exhausted into the low-pressure nitrogen pipe network after pressure stabilization, and the low-temperature nitrogen originally exhausted can be recycled through the recycling system, so that the nitrogen consumption in production is reduced, the production cost is saved for industrial production, and the method has considerable economic benefit.
Description
Technical Field
The utility model relates to the technical field of rare gas refining, in particular to a nitrogen recovery system for a concentration tower.
Background
The low temperature air separation technology is to utilize the difference of boiling points of all components in the gas, and to carry out rectification for a plurality of times through a fractionating tower until a plurality of substances are separated, and the rare gas separation technology is also utilized, and the krypton-xenon concentration tower is to extract the raw material of krypton-xenon from oxygen.
At present, the domestic technology for concentrating krypton and xenon by liquid oxygen is relatively backward, the production cost is high, the extraction rate is low, and the process is complex. The utility model with publication number of CN216863648U discloses a liquid oxygen concentration krypton-xenon device, wherein a gas-liquid separator is arranged at the top of a rectifying tower, oxygen vapor discharged from the top of the rectifying tower is partially liquefied, and gas phase obtained by separation is further condensed and liquefied by a top condenser, so that krypton and xenon components in the oxygen vapor are recovered, and the product yield is improved; the condensed liquid oxygen at the top of the tower is used for exchanging heat with the raw material liquid, the supercooling of the liquid oxygen product reduces the loss, the light components in the raw material liquid are evaporated, the reboiling load of the rectifying tower is reduced, and the energy is saved and the consumption is reduced. The device is in the in-process of purifying krypton xenon gas, the liquid nitrogen provides the cold volume and gasifies to discharge from the condenser, finally get into the liquid nitrogen balance tank, but the liquid nitrogen of discharging from the liquid nitrogen balance tank middle part is throttled and is got into the subcooler and provide the cold volume after being gasified by oneself, gets into the back cooler and further provides the cold volume, and self is reheated and divide into two strands after, and one strand gets into the atmosphere, and one strand gets into the nitrogen booster compressor, gets into the buffer tank after being compressed, so the low temperature nitrogen after the play tower has partially to be emptied after the decompression, does not retrieve it again, has caused the waste of nitrogen, and then can increase industrial production's cost. Accordingly, the present utility model proposes a nitrogen recovery system for a concentration column to solve the above-mentioned problems.
Disclosure of Invention
In view of the shortcomings of the prior art, the utility model aims to provide a nitrogen recovery system for a concentration tower, which has the advantage of recycling low-temperature nitrogen after exiting the tower, and can solve the problems of the prior krypton-xenon gas refining device.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a nitrogen gas recovery system for concentration tower, includes concentration tower body, first electric heater, second electric heater and buffer tank, the top of concentration tower body is provided with the evaporimeter, the top of concentration tower body is provided with the condenser, be connected with first blast pipe between the gas outlet of evaporimeter and the air inlet of second electric heater, be connected with the second blast pipe between the gas outlet of condenser and the first blast pipe, be provided with the blow-down pipe on the first blast pipe, be connected with the gas-supply pipe between the gas outlet of second electric heater and the air inlet of buffer tank, the gas outlet of buffer tank is connected with the recovery pipe.
As a preferable scheme, an air inlet of the first electric heater is connected with an air inlet pipe, an air inlet regulating valve is arranged on the air inlet pipe, and an air outlet pipe is connected between an air outlet of the first electric heater and an air inlet of the evaporator.
As a preferable scheme, the first exhaust pipe is provided with an air inlet regulating valve, and an air outlet of the air inlet regulating valve is closer to an air outlet of the first exhaust pipe than an air inlet of the blow-down pipe.
Preferably, the second exhaust pipe is provided with an exhaust regulating valve, and the air outlet of the second exhaust pipe is closer to the air inlet of the first exhaust pipe than the air inlet of the blow-down pipe.
Preferably, the blow-down pipe is provided with a pressure monitor and a blow-down regulating valve, and an air inlet of the pressure monitor is closer to an air inlet of the blow-down pipe than an air inlet of the blow-down regulating valve.
Preferably, the recovery pipe is provided with a recovery valve.
Compared with the prior art, the utility model has the following beneficial effects:
when purifying krypton-xenon gas, the low-temperature nitrogen exhausted by the evaporator and the condenser is collected in the first exhaust pipe and enters the second electric heater, the second electric heater can heat the low-temperature nitrogen to normal temperature, the normal-temperature nitrogen is exhausted into the buffer tank through the gas pipe, and is exhausted into the low-pressure nitrogen pipe network after pressure stabilization, and the low-temperature nitrogen originally exhausted can be recycled through the recycling system, so that the nitrogen consumption in production is reduced, the production cost is saved for industrial production, and the method has considerable economic benefit.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a schematic plan view of the present utility model;
fig. 3 is a perspective back view of the body of the concentrator column of the present utility model.
In the drawings, the list of components represented by the various numbers is as follows:
1. a concentrating tower body; 2. a first electric heater; 3. a second electric heater; 4. a buffer tank; 5. an evaporator; 6. a condenser; 7. a first exhaust pipe; 71. an air inlet regulating valve; 8. a second exhaust pipe; 81. an exhaust gas regulating valve; 9. blow-down pipe; 91. a pressure monitor; 92. an air release regulating valve; 10. a gas pipe; 11. a recovery pipe; 111. a recovery valve; 12. an air inlet pipe; 121. an intake air regulating valve; 13. and an air outlet pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-3, the present utility model provides a nitrogen recovery system for a concentration column, and the present utility model is described in further detail below with reference to the accompanying drawings.
Examples:
a nitrogen recovery system for concentration tower, including concentration tower body 1, first electric heater 2, second electric heater 3 and buffer tank 4, the intussuseption of concentration tower body 1 is filled with krypton xenon concentrate, the top of concentration tower body 1 is provided with evaporimeter 5, the top of concentration tower body 1 is provided with condenser 6, be connected with first blast pipe 7 between the gas outlet of evaporimeter 5 and the air inlet of second electric heater 3, be connected with second blast pipe 8 between the gas outlet of condenser 6 and the first blast pipe 7, be provided with blow-down pipe 9 on the first blast pipe 7, be connected with gas-supply pipe 10 between the gas outlet of second electric heater 3 and the air inlet of buffer tank 4, the gas outlet of buffer tank 4 is connected with recovery pipe 11.
Specifically, as shown in fig. 1 and 3, the air inlet of the first electric heater 2 is connected with an air inlet pipe 12, an air inlet regulating valve 121 is arranged on the air inlet pipe 12, an air outlet pipe 13 is connected between the air outlet of the first electric heater 2 and the air inlet of the evaporator 5, the air inlet of the air inlet pipe 12 is connected with a nitrogen pipe network, when krypton-xenon gas is purified, the air inlet regulating valve 121 can be opened, nitrogen in the nitrogen pipe network is discharged into the first electric heater 2 through the air inlet pipe 12, the first electric heater 2 can heat the nitrogen, high-temperature nitrogen enters the evaporator 5 through the air outlet pipe 13, the high-temperature nitrogen can be used as a heat source to exchange heat with the krypton-xenon concentrated solution at the bottom of the inner cavity of the concentration tower body 1, so that the liquid oxygen in the concentrated solution has a low boiling point, the concentrated solution is firstly evaporated and floats to the top of the inner cavity of the concentration tower body 1, then the oxygen pipe is arranged at the top of the back of the concentration tower body 1, the oxygen separated from the krypton-xenon concentrated solution is discharged out of the concentration tower body 1 through the oxygen pipe, the high-temperature nitrogen is changed into low-temperature nitrogen after heat exchange is performed by the first air pipe 7, the low-temperature nitrogen liquid nitrogen is discharged from the evaporator 5, and then the low-temperature nitrogen can be introduced into the condenser 6, and the low-temperature nitrogen and the high-temperature nitrogen gas is exchanged with the high-temperature nitrogen gas to be converted into the liquid nitrogen gas by the high-temperature liquid nitrogen 48 through the inner cavity Wen Kexian, so that the liquid nitrogen is changed into the inner cavity along the inner cavity of the concentration tower.
Compared with the conventional normal-temperature nitrogen heating, the heat exchange temperature difference is increased, the nitrogen consumption is saved, the electricity cost for multiple consumption is much lower than the nitrogen cost, and meanwhile, the heat load of the evaporator 5 can be adjusted by adjusting the opening of the air inlet adjusting valve 121 or the heating temperature of the first electric heater 2, so that the evaporator reaches the optimal state required by production.
Specifically, as shown in fig. 1 and 2, an exhaust adjusting valve 81 is disposed on the second exhaust pipe 8, the low-temperature nitrogen is changed into low-temperature nitrogen after the heat exchange of the liquid nitrogen, then the exhaust adjusting valve 81 is opened, the low-temperature nitrogen is discharged into the first exhaust pipe 7 through the second exhaust pipe 8, an air inlet adjusting valve 71 is disposed on the first exhaust pipe 7, the low-temperature nitrogen discharged from the evaporator 5 and the condenser 6 is collected in the first exhaust pipe 7, and at this time, the air inlet adjusting valve 71 is opened to enable the low-temperature nitrogen to enter the second electric heater 3.
Further, as shown in fig. 1 and 2, the blow-down pipe 9 is provided with a pressure monitor 91 and a blow-down regulating valve 92, the air inlet of the pressure monitor 91 is closer to the air inlet of the blow-down pipe 9 than the air inlet of the blow-down regulating valve 92, the air outlet of the second exhaust pipe 8 is closer to the air inlet of the first exhaust pipe 7 than the air inlet of the blow-down pipe 9, the air outlet of the air inlet regulating valve 71 is closer to the air outlet of the first exhaust pipe 7 than the air inlet of the blow-down pipe 9, the pressure monitor 91 can detect the air pressure of the nitrogen gas converged in the first exhaust pipe 7, and meanwhile, the pressure of a pipeline can be regulated by controlling the blow-down regulating valve 92, so that the pipeline pressure reaches the optimal state required by production.
Still further, as shown in fig. 1 and 2, the recovery pipe 11 is provided with a recovery valve 111, the second electric heater 3 can heat the low-temperature nitrogen to normal temperature, the normal-temperature nitrogen is discharged into the buffer tank 4 from the gas pipe 10, the recovery valve 111 is opened after pressure stabilization, the low-temperature nitrogen can be sent into the low-pressure nitrogen pipe network, and meanwhile, the temperature of the nitrogen discharged from the gas pipe 10 can be adjusted by the opening of the gas inlet adjusting valve 71 or the heating temperature of the second electric heater 3.
When the krypton-xenon gas purifying device is specifically used, as shown in fig. 1, 2 and 3, when krypton-xenon gas is purified, low-temperature nitrogen discharged through the evaporator 5 and the condenser 6 is collected in the first exhaust pipe 7 and enters the second electric heater 3, the second electric heater 3 can heat the low-temperature nitrogen to normal temperature, the normal-temperature nitrogen is discharged into the buffer tank 4 through the gas pipe 10, and is discharged into a low-pressure nitrogen pipe network after pressure stabilization, and the originally discharged low-temperature nitrogen can be recycled through the recycling system, so that the nitrogen consumption in production is reduced, the production cost is saved for industrial production, and the device has considerable economic benefit.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, the description with reference to the terms "one aspect," "some aspects," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the present utility model. In this specification, the schematic representations of the above terms are not necessarily for the same scheme or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.
Claims (6)
1. A nitrogen recovery system for concentration tower, includes concentration tower body (1), first electric heater (2), second electric heater (3) and buffer tank (4), its characterized in that: the top of concentration tower body (1) is provided with evaporimeter (5), the top of concentration tower body (1) is provided with condenser (6), be connected with first blast pipe (7) between the gas outlet of evaporimeter (5) and the air inlet of second electric heater (3), be connected with second blast pipe (8) between the gas outlet of condenser (6) and first blast pipe (7), be provided with blow-down pipe (9) on first blast pipe (7), be connected with gas-supply pipe (10) between the gas outlet of second electric heater (3) and the air inlet of buffer tank (4), the gas outlet of buffer tank (4) is connected with recovery pipe (11).
2. A nitrogen recovery system for a concentrating column according to claim 1, wherein: an air inlet of the first electric heater (2) is connected with an air inlet pipe (12), an air inlet regulating valve (121) is arranged on the air inlet pipe (12), and an air outlet pipe (13) is connected between an air outlet of the first electric heater (2) and an air inlet of the evaporator (5).
3. A nitrogen recovery system for a concentrating column according to claim 1, wherein: the first exhaust pipe (7) is provided with an air inlet regulating valve (71), and an air outlet of the air inlet regulating valve (71) is closer to an air outlet of the first exhaust pipe (7) than an air inlet of the blow-down pipe (9).
4. A nitrogen recovery system for a concentrating column according to claim 1, wherein: the second exhaust pipe (8) is provided with an exhaust regulating valve (81), and the air outlet of the second exhaust pipe (8) is closer to the air inlet of the first exhaust pipe (7) than the air inlet of the blow-down pipe (9).
5. A nitrogen recovery system for a concentrating column according to claim 1, wherein: the pressure monitor (91) and the air release regulating valve (92) are arranged on the air release pipe (9), and the air inlet of the pressure monitor (91) is closer to the air inlet of the air release pipe (9) than the air inlet of the air release regulating valve (92).
6. A nitrogen recovery system for a concentrating column according to claim 1, wherein: the recovery pipe (11) is provided with a recovery valve (111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321676141.6U CN220205422U (en) | 2023-06-29 | 2023-06-29 | Nitrogen recovery system for concentration tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321676141.6U CN220205422U (en) | 2023-06-29 | 2023-06-29 | Nitrogen recovery system for concentration tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220205422U true CN220205422U (en) | 2023-12-19 |
Family
ID=89149187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321676141.6U Active CN220205422U (en) | 2023-06-29 | 2023-06-29 | Nitrogen recovery system for concentration tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220205422U (en) |
-
2023
- 2023-06-29 CN CN202321676141.6U patent/CN220205422U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101538040B (en) | Method for coproducing or singly producing food grade carbon dioxide and industrial grade carbon dioxide by utilizing industrial waste gas | |
| CN201281522Y (en) | Oxygen self-supercharging air separating device | |
| JPH08175806A (en) | Method and plant for manufacturing gaseous oxygen under pressure | |
| CN104406364B (en) | The argon of a kind of double tower coupling reclaims purifier apparatus and argon reclaims purification process | |
| CN110207457B (en) | Air separation equipment capable of preparing liquid nitrogen and application method thereof | |
| CN103123203A (en) | Method of preparing pure nitrogen by using exhaust gas with nitrogen to carry out once-more cryogenic distillation | |
| CN107345737A (en) | The double condensation stream backed expansion nitrogen making machines of double tower and its method for preparing nitrogen | |
| CN108106327B (en) | Low-purity oxygen-enriched preparation device and method | |
| CN110455038A (en) | A kind of system of helium extraction unit, helium extraction element and coproduction helium | |
| CN207716722U (en) | A kind of oxygen-enriched device for making of new belts liquid nitrogen pump low-purity | |
| CN101509722A (en) | Distillation method and apparatus | |
| CN215412752U (en) | Double-tower low-temperature rectification high-purity nitrogen preparation device | |
| CN110803689A (en) | Argon recovery method and device for removing carbon monoxide and integrating high-purity nitrogen by rectification method | |
| CN220205422U (en) | Nitrogen recovery system for concentration tower | |
| CN112556314A (en) | Low-energy-consumption device for preparing pure nitrogen by using single tower and manufacturing method thereof | |
| CN1038514A (en) | Produce the air separating technological of hyperbaric oxygen and elevated pressure nitrogen | |
| CN101915495A (en) | Full liquid-air separation unit using liquefied natural gas cold energy and method thereof | |
| CN216790655U (en) | Low-energy-consumption device for preparing pure nitrogen in single tower | |
| CN212842470U (en) | Single-tower cryogenic rectification argon recovery system with circulation function | |
| CN201876055U (en) | Full-liquid air separation device using cold energy of liquefied natural gas | |
| CN114440553A (en) | Low-energy-consumption double-tower pure nitrogen preparation device adopting nitrogen expansion refrigeration and application method | |
| CN114791204A (en) | Nitrogen circulating low-temperature rectification crude argon purification and liquefaction device and use method thereof | |
| CN107473223A (en) | A kind of CO cryogenic separation system and method using nitrogen cycle | |
| CN207716721U (en) | A kind of kiln double condensation oxygen-enriched device for making of low-purity of double tower | |
| CN202109724U (en) | Air pressurization backflow expansion inner compression air separation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |