CN105771873B - A kind of structured packing of efficient mass transfer - Google Patents
A kind of structured packing of efficient mass transfer Download PDFInfo
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- CN105771873B CN105771873B CN201610192044.8A CN201610192044A CN105771873B CN 105771873 B CN105771873 B CN 105771873B CN 201610192044 A CN201610192044 A CN 201610192044A CN 105771873 B CN105771873 B CN 105771873B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/32—Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
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- Physical Or Chemical Processes And Apparatus (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The present invention relates to a kind of structured packings of efficient mass transfer, are alternately arranged and are formed by different structured packing blade unit group A, B of height；Unit group A upper/lower terminals protrude part and are wrapped up with woven wire all than unit group B protrusion height h；Unit group A, B uses identical structured packing piece.Unit group A, B uses identical structured packing piece for the structure of perforated plate corrugated calendering Lamb wave line, screen waviness, window diversion or acanthopore ripple.Structured packing in the present invention not only makes gas-liquid two-phase carry out falling liquid film contact mass transfer on filler surface, but also forms bubble type mass transfer mode in packing box intersection, thus greatly strengthens gas-liquid mass transfer efficiency.Structured packing realizes two kinds of gas-liquid mass transfer modes in plate column and packed tower in the present invention, the undesirable condition that packed tower mass-transfer efficiency reduces under the conditions of operation with high pressure is effectively improved, is of great significance for many industrialized productions of rectifying, absorptions etc. on a large scale.
Description
Technical field
The present invention relates to a kind of novel structured packings having compared with high mass transfer efficiency, it is contacted with filler surface falling liquid film
Mass transfer and column plate are bubbled the common feature of gas-liquid mass transfer, considerably increase gas-liquid mass transfer efficiency.
Background technology
Structured packing plays very important effect as the critical piece of the gas-liquid contact in packed tower.In recent years,
Development with petrochemical industry and energy-efficient needs, exploitation and the application of structured packing are grown rapidly, and are distilled and inhaled
The breakthrough variation of the chemical fields such as receipts also promotes the research and development of high-throughput structured packing to gain great popularity.But in high-pressure rectification field
It closes, since condition of high voltage is bigger on operation object system and the dynamic influence of gas-liquid distributed flow, causes gas liquid interfacial area to decline, mass transfer pushes away
Power reduces, and finally reduces the mass-transfer efficiency of structured packing.Thus high-pressure rectification is detached, such as propane-propylene separation,
Plate column is generally used in industry.Since the relative volatility of propane and propylene is smaller, using the method for industrial conventional distil-lation,
The tower height of design reaches 90 meters, and for the number of plates at 200 pieces or more, reflux ratio is more than 10, and the technological processes such as will also pressurize, freeze, this
It causes operating cost and cost of equipment greatly increases.In recent years, with the increase to low-carbon hydrocarbons separation requirement, for
The demand of high-tension apparatus is also increasing, and the highly desirable structured packing of people plays its advantage in high-pressure rectification field, thus
Developing a kind of structured packing of the efficient mass transfer under high pressure operating mode seems particularly significant.
In recent years, people do not go out thoroughly for improving the research layer of the mass-transfer efficiency of structured packing.CN 202823396 U
It is middle proposition by the specially treated of structured packing surface, so that it is covered with continuous ripplet, increase in this way filler specific surface area and
Roughness, to improve the mass-transfer efficiency of filler.Become through processing using Foamed Nickel web material matter in 101549278 A of CN
Ductility corrugated plating, the structured packing being made in this way have larger specific surface area, to have higher gas-liquid mass transfer
Efficiency.It is proposed a kind of S types ripple packing in 203620643 U of CN, this filler unit is by up and down the two of structured packing ontology
Rule setting straight trip ripple respectively is held, passes through oblique ripple unicom, this S type ripples by rule setting between ripple of keeping straight on
Filler increases mass transfer specific surface area, optimizes gas-liquid flow path, thus shows good mass-transfer performance.CN101380562 A
It is middle to propose that wave crest and trough in corrugated filler tablet open up water conservancy diversion window, to make to become along the liquid film that trough flows downward
Change, effectively promote the update and turbulence of filler surface liquid film, improves gas-liquid mass transfer rate.
Most of patented inventions make its specific surface area or roughness become larger just for packing sheet surface texture is changed,
However under high-pressure rectification operating mode, very big change occurs for gas-liquid object system physical property, and filler surface area may be caused fully sharp
With, thus this method can't be fully solved the production application of filler under the conditions of high-pressure rectification.
Invention content
The present invention proposes that a kind of novel structured packing having compared with high mass transfer efficiency, the filler have column plate bubble type gas
The common feature of liquid mass transfer and filler surface falling liquid film contact mass transfer, largely increases gas-liquid mass transfer efficiency.
The invention is realized in this way：
A kind of structured packing of efficient mass transfer is alternately arranged by different structured packing blade unit group A, B of height and is formed；It is single
Tuple A upper/lower terminals protrude part and are wrapped up with woven wire all than unit group B protrusion height h；Unit group A, B uses phase
Same structured packing piece.
Unit group A, B use identical structured packing piece for it is perforated plate corrugated, calendering Lamb wave line, screen waviness, open
The structure of window water conservancy diversion or acanthopore ripple.
Described is that structured packing piece quantity is preferably 2 in unit group A, B.
The height h of the unit group A upper and lower ends protrusion part is preferably 10~30mm.
The woven wire of the parcel form tuple A preferably uses 10~20 mesh.
Application of the filler of the present invention in tower, processes structured packing when tower diameter is smaller according to specific equipment internal diameter
At the rectangular or circular discs of calibrated altitude；When tower diameter is larger, filler piecemeal is installed, and redistribution is installed between packing layer
Device redistributes liquid phase.
When placing multiple packing boxs inside packed tower, rotation angle is 90 ° between neighbouring two disks filler.
It is an advantage of the invention that：Since woven wire encloses the upper and lower ends of unit of structured packing group A, work as liquid phase fluid
When into entire packing box upper end, due to the effect of surface tension of liquid, one layer of liquid film can be formed on a wire mesh, is blocked
Inflow of the gas phase in the lower ends unit group A, so that gas phase can only be flowed into from the lower ends unit group B, and gas phase actual internal area reduces
Approximately half of, this makes gas phase flow velocity in packing box intersection abruptly increase, causes interface portion that local liquid flooding occurs, so that
Liquid phase forms certain liquid level in packing box intersection.When gas phase enters upper disk filler from lower wall filler, a kind of drum is just formd
The state of bubble, the interface between such packing box are equivalent to one layer of column plate.Structured packing in the present invention not only makes gas-liquid two
Falling liquid film contact mass transfer mutually is carried out on filler surface, and bubble type mass transfer mode is formed in packing box intersection, thus is increased greatly
Strong gas-liquid mass transfer efficiency.Structured packing realizes two kinds of gas-liquid mass transfer modes in plate column and packed tower in the present invention, effectively
Ground improves the undesirable condition of packed tower mass-transfer efficiency reduction under the conditions of operation with high pressure, for many large-scale rectifying, absorbs
Etc. industrialized productions be of great significance.
Description of the drawings
Fig. 1 is the stereoscopic schematic diagram of invention filler.
Fig. 2 is the vertical view of invention filler.
Fig. 3 is the front view of invention filler.
Fig. 4 is gas phase flow schematic diagram inside invention filler.
Fig. 5 is adjacent packing box intersection part liquid flooding area.
Specific implementation mode
Present invention will be described in further detail below with reference to the accompanying drawings：
As illustrated in fig. 1 and 2, a kind of structured packing with higher gas-liquid mass transfer efficiency, by the regular of two kinds of different heights
Filler blade unit group A, B is alternately arranged composition.Unit group A protrudes h, the part metal of protrusion than unit group B upper/lower terminals
Silk screen wraps up.Structured packing piece can be perforated plate corrugated filler piece, window diversion packing sheet, protruded corrugated sheet packing piece, thorn
The regular packing sheets such as hole corrugated filler tablet, wire mesh packing piece.The quantity of packing sheet is all 2 in unit group A, B.
Unit group A upper and lower ends are h with the height of woven wire wrapping portion, and wherein h can be 10mm~30mm.
Small tower diameter is produced, it is high to set structured packing disk according to tower diameter；For larger tower diameter, piecemeal installation may be used
With the method for dismounting.
As shown in figure 3, when placing multiple packing boxs in tower, neighbouring packing box is placed angle and is rotated by 90 °, if filling out
The bed of material is higher, to carry out liquid redistribution every one section of height packing layer installation redistributor.
The general structured packing of filler pressure drop ratio of the present invention is big, but gas-liquid mass transfer efficiency is greatly enhanced, particularly with
The operating conditions such as high-pressure rectification, absorption are more practical.
As shown in Figures 4 and 5 since liquid has surface tension, can be formed on silk screen surface after liquid flows through woven wire
Liquid film hinders gas phase to be flowed into from the lower ends filler unit group A.Make that gas phase flow channel is significantly at structured packing disk interface in this way
Reduce, local gas velocity increases, and leads to the generation of local liquid flooding.When gas phase flows through local liquid flooding region, worn in a manner of bubbling
The region is crossed, to enhance mass transfer effect between gas-liquid.Gas phase continues after flowing through local liquid flooding region and structured packing surface stream
Dynamic liquid film carries out contact mass transfer.Structured packing of the present invention realizes two kinds of gas-liquid mass transfer modes of plate column and packed tower, significantly
Enhance mass-transfer efficiency.
Embodiment 1：
It uses tower diameter for DN400, is highly the cold model unit of 5m respectively to structured packing of the present invention and general window diversion
Structured packing carries out hydrodynamic performance test.Tower top carries out initial distribution equipped with liquid distribution trough to liquid phase.Inner-tower filling material layer
6 disk structured packings, packing layer total height 1320mm are housed in total.Unit group A height is 220mm, unit group B in structured packing disk
Height is 200mm.The height h of wherein unit group A upper/lower terminals protrusion part is 10mm, and the woven wire of 20 mesh is used in combination to wrap up.
Packing sheet uses 500X window diversion packing sheets.Experimentation uses sprinkle density ranging from 0~90m3/m2H, gas phase F factor models
It encloses for 0~3.0Pa0.5.The result shows that comparing common structured packing, packing pressure drop of the present invention is higher than general window diversion filler
Go out about 15~40%, liquid holdup is higher by 20%~50%.Due to the generation of local Concerning Flooding Phenomenon between neighbouring packing box, lead
The raising of gas phase flow resistance is caused, so that pressure drop and liquid holdup increase.
Embodiment:2：
Rectifying separation is carried out to propane-propylene under high pressure using the packed tower of pilot-scale, the test present invention is regular
Filler mass-transfer performance.The a diameter of DN600 of packed tower, inner-tower filling material layer are 10 disk structured packings, two sections are divided into, in packing layer
Between liquid re-distributor is partly installed.Structured packing piece of the present invention uses 250X profiled orifice plate corrugated filler tablets.In structured packing disk,
Unit group A height is 250mm, and the height of unit group B is 220mm.Unit group A upper and lower side projecting portion heights h is 15mm, is used in combination
12 mesh woven wires wrap up.Liquid phase sprinkle density range uses 10~80m3/m2H, empty tower gas velocity ranging from 0.1~2.5m/s.It is logical
Cross the theoretical cam curve that the height of transfer unit and unit height packing layer of filler of the present invention is calculated in experimental data.Fact card
Bright, every meter of height structured packing of the present invention is equivalent to 5~6 grades of number of theoretical plates and is compared with Conventional plate-type tower, substantially reduces rectifying
Tower height degree saves fixed investment expense.
Embodiment 3：
It repacks stainless steel tower segment among the chill tower of DN400 into transparent organic glass tower section, is equipped with and implementation in tower
Identical structured filling material layer is observed in example 1.In experimentation, find rapid in neighbouring packing box juncture area liquid phase
Stream is more violent, and has the liquid of certain liquid level to accumulate in silk screen layer, and gas is distributed to the region in the form of bubble.The observation is real
Test the presence for further showing that local liquid flooding area.
Claims (2)
1. a kind of structured packing of efficient mass transfer is alternately arranged by different structured packing blade unit group A, B of height and is formed；It is special
Sign is：Unit group A upper/lower terminals protrude part and are wrapped up with woven wire all than unit group B protrusion height h；Unit group A,
B uses identical structured packing piece；Unit group A, B uses identical structured packing piece for perforated plate corrugated, calendering Lamb wave line, silk screen
The structure of ripple, window diversion or acanthopore ripple；The woven wire of parcel form tuple A uses 10~20 mesh；Unit group A or more two
The height h of end protrusion part is 10~30mm.
2. filler as described in claim 1, it is characterized in that structured packing piece quantity is 2 in unit group A, B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610192044.8A CN105771873B (en) | 2016-03-30 | 2016-03-30 | A kind of structured packing of efficient mass transfer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610192044.8A CN105771873B (en) | 2016-03-30 | 2016-03-30 | A kind of structured packing of efficient mass transfer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105771873A CN105771873A (en) | 2016-07-20 |
| CN105771873B true CN105771873B (en) | 2018-10-23 |
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| CN201610192044.8A Active CN105771873B (en) | 2016-03-30 | 2016-03-30 | A kind of structured packing of efficient mass transfer |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6427648B1 (en) * | 2017-09-28 | 2018-11-21 | ニチアス株式会社 | Air-liquid contactor |
| MX2021003483A (en) * | 2018-09-25 | 2022-03-11 | Brentwood Ind Inc | Cross corrugated media and related method. |
| CN110038395A (en) * | 2019-04-10 | 2019-07-23 | 互邦达科技（北京）有限公司 | A kind of regular wire packing, manufacturing process and high-gravity rotating bed |
| FR3095129B1 (en) * | 2019-04-16 | 2021-03-12 | Air Liquide | Corrugated-crossed metal foam filling |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091646C (en) * | 1994-10-04 | 2002-10-02 | 普莱克斯技术有限公司 | Structured packing with improved capacity for rectification systems |
| US5921109A (en) * | 1998-10-21 | 1999-07-13 | Praxair Technology, Inc. | Method for operating a cryogenic rectification column |
| CN1935354A (en) * | 2006-09-19 | 2007-03-28 | 杭州杭氧股份有限公司 | Plate corrugated regular packed tower |
| CN103721666B (en) * | 2013-12-13 | 2016-01-13 | 天津大学 | A kind of catalytic rectification packing had compared with low pressure drop |
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| CN105771873A (en) | 2016-07-20 |
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Address after: 210046 Wen Lan Road, Qixia District, Nanjing, Jiangsu Province, No. 6 Co-patentee after: Tianjin University Patentee after: China Construction Installation Group Co., Ltd. Address before: 210000 New Village of Yaohua Menyao'an, Qixia District, Nanjing City, Jiangsu Province Co-patentee before: Tianjin University Patentee before: China Construction Industrial Equipment Installation Co., Ltd. |
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