CN202947427U - Novel air-separation upper tower structure - Google Patents
Novel air-separation upper tower structure Download PDFInfo
- Publication number
- CN202947427U CN202947427U CN2012205074277U CN201220507427U CN202947427U CN 202947427 U CN202947427 U CN 202947427U CN 2012205074277 U CN2012205074277 U CN 2012205074277U CN 201220507427 U CN201220507427 U CN 201220507427U CN 202947427 U CN202947427 U CN 202947427U
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- China
- Prior art keywords
- plate
- cylindrical shell
- sieve
- novel air
- tower structure
- 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.)
- Expired - Fee Related
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Classifications
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- 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
- F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
- F25J3/04903—Plates or trays
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- 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
- F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
- F25J3/04909—Structured packings
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- 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
- F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
- F25J3/04915—Combinations of different material exchange elements, e.g. within different columns
- F25J3/04921—Combinations of different material exchange elements, e.g. within different columns within the same column
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model discloses a novel air-separation upper tower structure which includes an upper sieve plate structure and a lower feeding structure which are connected through a downcomer. The novel air-separation upper tower structure can reduce the bottom pressure of the upper tower so that the purpose of saving energy is achieved. A tower tray of an auxiliary tower is changed into a sieve plate used for replacing the common structured packing, and the performance is also reliable, and the cost is low. By utilizing the sieve plate, the novel air-separation upper tower structure can reduce the height of the auxiliary tower, and meanwhile can effectively reduce the height of a cold-keeping box.
Description
Technical field
The utility model belongs to the cryogenic air separation technical field, is specifically related to the upper tower structure in a kind of full low-pressure air separation method.
Background technology
Empty minute upper tower tray floor structural shape has two kinds of sieve plate and structured packings, the rectifying column of two kinds of structural shapes Comparatively speaking, performance is all the same reliable.Adopt regular packed tower to compare with adopting sieve-plate tower, the driving resistance of packed tower is less, operating flexibility larger (mainly being more conducive to lower limit of operation); But the regular packed tower cost is high, is applicable to move under the environment of low pressure.At the beginning of the nineties, structured packing begins to be applied to empty minute cryogenic rectification tower, replaces traditional sieve plate.At present in the extrapolated air separation unit of state, upper tower and argon column all adopt packed tower (seeing Fig. 1).Upper tower can reduce the pressure that air enters lower tower after adopting the structured packing of low pressure drop significantly, thereby reduces the energy consumption of the compression ratio saving 5%～10% of air.
The utility model content
The purpose of this utility model is that the auxiliary tower section of tower epimere on sky divides adopts sieve plate, all the other each sections adopt structured packing, satisfying the cost of tower on reducing in tower bottom pressure on reducing, is to reduce the pressure that air advances lower tower and reduce upper tower bottom pressure, reaches equally energy-conservation purpose.
Technical scheme: a kind of Novel air divides tower structure, comprise link together epimere cylindrical shell and hypomere cylindrical shell, the top of epimere cylindrical shell arranges end socket, a nitrogen outlet pipe and vexed plate are set on end socket at least, the epimere cylindrical shell arranges a liquid nitrogen inlet tube at least, the zone arranges a dirty nitrogen outlet pipe at least between upper and lower section cylindrical shell, and the hypomere cylinder body bottom arranges vexed plate; It is characterized in that: adopt in the epimere cylindrical shell two-layer above column plate to stack and combine sieve-plate structure in the interval at a certain distance, column plate is imperforate plate, sieve tray and the fixing assembly of overflow downcomer docking, an overflow downcomer is set on every layer of column plate at least, and the overflow downcomer of upper and lower layer column plate is crisscross arranged; Adopt filling-material structure in the hypomere cylindrical shell, two-layer or two-layer certain above specification structured packing at a certain angle interfolded on packing support, the superiors establish filler hold-down mechanism (filler pressing), the column plate bottom of described epimere cylindrical shell bottommost is provided with and connects the liquid bucket, connects the liquid bucket and is connected by the distributor of downspout with cylindrical shell top, bottom.
Epimere cylindrical shell and column plate material adopt aluminium alloy, the deep refrigerating project common used materials such as stainless steel or copper.
Sieve plate adopts circulation sieve plate or convection current sieve plate, and wherein the circulation sieve plate is the circulation sieve plate pattern of single overflow or double overflow or three overflows or the stream that overflows, and the convection current sieve-plate tower is the convection current sieve plate pattern of single overflow or double overflow or three overflows or the stream that overflows.
Described epimere barrel diameter is equal to or less than the hypomere barrel diameter, is connected with cylinder or cone mode.
The quantity of sieve plate is 6～15.
The height of described overflow downcomer is provided with liquid barrier higher than the height of imperforate plate between imperforate plate and sieve tray, the height of this liquid barrier is higher than the height of overflow downcomer.
The bottom of described sieve-plate structure arranges crossbeam, and crossbeam is fixed on the epimere cylindrical shell, is provided with on crossbeam for supporting the also distance rod of control tower distance between plates.
Described filling-material structure comprises distributor from top to bottom successively, filler pressing, and regular district and packing support wherein are respectively arranged with through hole on filler pressing and packing support.
Also be provided with at least one compression fittings, a temperature joint, an analyzing adapter at the epimere cylindrical shell.
Beneficial effect: 1. because in the molecular sieve flow process, the basic factor that determines lower tower operating pressure be dirty nitrogen in order to satisfy the regeneration of purification system, dirty nitrogen goes out the pressure that main heat exchanger must have about 10Kpa.The same with tower in traditional structured packing, still adopt structured packing below dirty nitrogen outlet, can reduce upper tower bottom pressure and reach energy-conservation purpose.
2. auxiliary tower tray floor makes sieve plate into, replaces structured packing commonly used, and performance is reliable equally, and has the low characteristics of cost.
3. adopt sieve plate can reduce auxiliary tower height degree simultaneously, can effectively reduce the cold insulated cabinet height simultaneously.
Description of drawings:
Fig. 1 is the structure diagram of tower epimere on sieve plate commonly used;
Fig. 2 is upper tower epimere structure diagram of the present utility model;
Fig. 3 is sieve tray and overflow downcomer syndeton side schematic view;
Fig. 4 is sieve tray and overflow downcomer syndeton schematic top plan view;
Fig. 5 be in Fig. 4 A to structural representation.
in figure, label 1 is down depression plate, 2 is support ear, 3 is packing support, 4 is cylindrical shell (epimere cylindrical shell and hypomere cylindrical shell), 5 is the packing area, 6 is filler pressing, 7 is distributor, 8 is backing plate, 9 for connecing liquid bucket and downspout, 10 is sieve plate, 11 is hanger, 12 is gauge pipe (being used for setting pressure joint or temperature joint or analyzing adapter), 13 is nitrogen outlet pipe, 14 is upper vexed plate, 15 is end socket, 16 is backing plate, 17 is liquid barrier, 18 is the liquid nitrogen inlet tube, 19 is crossbeam and spacing column, 20 is dirty nitrogen outlet pipe, 21 is imperforate plate, 22 is sieve tray, 23 is overflow downcomer, 24 is upper press ring, 25 is lower pressure ring, 26 are gear liquid platform, 27 is cone, 28 is backing plate, 29 is support ring, 30 is collector, 31 is distributor, 32 is fixed head, 33 is filler pressing, 34 is filler, 35 are the condiment support, 36 is support ear, 37 is downspout, 38 is support ear.
The specific embodiment
Embodiment 1: referring to Fig. 2, this Novel air divides tower structure to comprise to link together epimere cylindrical shell and hypomere cylindrical shell, and its material can select to adopt the deep refrigerating project common used materials such as aluminium alloy, stainless steel or copper, can be-200 ℃ of work.The top of epimere cylindrical shell arranges end socket 15, and nitrogen outlet pipe and vexed plate are set on end socket 15, and the epimere cylindrical shell arranges the liquid nitrogen inlet tube, the dirty nitrogen outlet pipe of region division between upper and lower section cylindrical shell, and the hypomere cylinder body bottom arranges vexed plate.
Wherein, adopt the multilayer column plate to stack the sieve-plate structure that combines in the interval at a certain distance in the epimere cylindrical shell, as shown in Fig. 3-Fig. 5, column plate is imperforate plate, sieve tray and the fixing assembly of overflow downcomer docking, the height of overflow downcomer is higher than the height of imperforate plate, be provided with liquid barrier between imperforate plate and sieve tray, the height of this liquid barrier is higher than the height of overflow downcomer.The overflow downcomer of upper and lower layer column plate is crisscross arranged, and sieve plate can adopt circulation sieve plate or convection current sieve plate, and the convection current sieve-plate tower in Fig. 2 is the single overflow pattern.Described epimere barrel diameter is equal to or less than the hypomere barrel diameter, is connected with cylinder or cone mode.
The column plate bottom of described epimere cylindrical shell bottommost is provided with and connects the liquid bucket, connects the liquid bucket and is connected by the distributor of downspout with cylindrical shell top, bottom.
The bottom of described sieve-plate structure arranges crossbeam, and crossbeam is fixed on the epimere cylindrical shell, is provided with on crossbeam for the distance rod that supports and control the sieve plate spacing.
Adopt filling-material structure in the hypomere cylindrical shell, this filling-material structure comprises distributor from top to bottom successively, filler pressing, and packing area and packing support wherein are respectively arranged with through hole on filler pressing and packing support.
Epimere cylindrical shell and inner sieve-plate structure thereof become auxiliary tower (referring to the tower body between the outlet of top of tower nitrogen outlet and dirty nitrogen), generally contain oxygen at customer requirements and just arrange less than the 10PPM low-pressure nitrogen.In this section rectifying work, the phegma that participates in rectifying is through the lower top of tower liquid nitrogen after cold, rising gas be oxygen content greater than the dirty nitrogen of 10PPM, obtain to contain oxygen less than the nitrogen of 10PPM at upper top of tower at last.The theoretical sieve plate number of upper tower is determined by the product nitrogen gas purity requirement, generally at 6～15.The diameter of this section tower body and product nitrogen gas output determine.
Described auxiliary tower has one or more nitrogen outlets, one or more liquid nitrogen imports, one or more dirty nitrogen outlets, one or multiple pressure power, temperature, analyzing adapter.
Claims (9)
1. a Novel air divides tower structure, comprise the epimere cylindrical shell and the hypomere cylindrical shell that link together, the top of epimere cylindrical shell arranges end socket, a nitrogen outlet pipe and vexed plate are set on end socket at least, the epimere cylindrical shell arranges a liquid nitrogen inlet tube at least, the zone arranges a dirty nitrogen outlet pipe at least between upper and lower section cylindrical shell, and the hypomere cylinder body bottom arranges vexed plate; It is characterized in that: adopt two-layer above column plate to stack the sieve-plate structure that combines in the interval at a certain distance in the epimere cylindrical shell, column plate is imperforate plate, sieve tray and the fixing assembly of overflow downcomer docking, an overflow downcomer is set on every layer of column plate at least, and the overflow downcomer of upper and lower layer column plate is crisscross arranged; Adopt filling-material structure in the hypomere cylindrical shell, two-layer above specification structured packing at a certain angle interfolded on packing support, the superiors establish the filler hold-down mechanism, the column plate bottom of described epimere cylindrical shell bottommost is provided with and connects the liquid bucket, connects the liquid bucket and is connected by the liquid distributor of downspout with cylindrical shell top, bottom.
2. Novel air according to claim 1 divides tower structure, it is characterized in that: epimere cylindrical shell and column plate material adopt aluminium alloy, the deep refrigerating project material of stainless steel or copper.
3. Novel air according to claim 1 divides tower structure, it is characterized in that: sieve plate adopts circulation sieve plate or convection current sieve plate, wherein the circulation sieve plate is the circulation sieve plate form of single overflow or double overflow or three overflows or the stream that overflows, and the convection current sieve plate is the convection current sieve plate form of single overflow or double overflow or three overflows or the stream that overflows.
4. Novel air according to claim 3 divides tower structure, it is characterized in that: described epimere barrel diameter is equal to or less than the hypomere barrel diameter, is connected with cylinder or cone mode.
5. according to claim 1-4 described Novel airs of any one divide tower structure, it is characterized in that: the quantity of column plate is 6～15.
6. Novel air according to claim 1 divides tower structure, it is characterized in that: the height of described overflow downcomer is provided with liquid barrier higher than the height of imperforate plate between imperforate plate and sieve tray, the height of this liquid barrier is higher than the height of overflow downcomer.
7. Novel air according to claim 1 divides tower structure, it is characterized in that: the bottom of described sieve-plate structure arranges crossbeam, and crossbeam is fixed on the epimere cylindrical shell, is provided with on crossbeam for supporting the also distance rod of control tower distance between plates.
8. Novel air according to claim 1 divides tower structure, it is characterized in that: described filling-material structure comprises distributor from top to bottom successively, filler pressing, and packing area and packing support wherein are respectively arranged with through hole on filler pressing and packing support.
9. Novel air according to claim 1 divides tower structure, it is characterized in that: also be provided with at least one compression fittings, a temperature joint, an analyzing adapter at the epimere cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205074277U CN202947427U (en) | 2012-09-29 | 2012-09-29 | Novel air-separation upper tower structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205074277U CN202947427U (en) | 2012-09-29 | 2012-09-29 | Novel air-separation upper tower structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202947427U true CN202947427U (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012205074277U Expired - Fee Related CN202947427U (en) | 2012-09-29 | 2012-09-29 | Novel air-separation upper tower structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873514A (en) * | 2018-08-30 | 2020-03-10 | 北大方正集团有限公司 | Crude argon extraction device |
| CN114322454A (en) * | 2021-12-24 | 2022-04-12 | 海澜智云科技有限公司 | Industrial Internet intelligent air separation device based on 5G network |
-
2012
- 2012-09-29 CN CN2012205074277U patent/CN202947427U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873514A (en) * | 2018-08-30 | 2020-03-10 | 北大方正集团有限公司 | Crude argon extraction device |
| CN114322454A (en) * | 2021-12-24 | 2022-04-12 | 海澜智云科技有限公司 | Industrial Internet intelligent air separation device based on 5G network |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20150929 |
|
| EXPY | Termination of patent right or utility model |