CN1676209A - Foam ceramic annular filler - Google Patents
Foam ceramic annular filler Download PDFInfo
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- CN1676209A CN1676209A CN 200510032704 CN200510032704A CN1676209A CN 1676209 A CN1676209 A CN 1676209A CN 200510032704 CN200510032704 CN 200510032704 CN 200510032704 A CN200510032704 A CN 200510032704A CN 1676209 A CN1676209 A CN 1676209A
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Abstract
The present invention relates to a foamed ceramic annular filler. Said filler comprises annular body and cylindrical hollow cavity, and said filler is made up by adopting foamed ceramics with 3-D porous reticular structure as raw material, its specific surface area is large, void volume is high, and its mass transfer surface and surface replacement rate are good.
Description
Technical field
The present invention relates to a kind of chemical industry mass transfer apparatus filler, in the packed tower device in the equipment such as oil refining, oil, chemical industry, fine chemistry industry, environmental protection, the ceramic packing of gas-liquid and liquid-liquid mass transfer apparatus.
Background technology
Filler is the core part in the chemical industry gas-liquid mass transfer (contact) equipment, and its effect mainly is to provide sufficient contact-making surface for gas-liquid or liquid liquid two-phase, strengthens two alternate mass transfer or diabatic processes.The structure of filler and performance have decisive influence to the technical-economic index of packed tower, and it is a kind of various lots of product, has important social and economic benefit.
Random packing extensively practical in the packed tower can be divided into entity filler and dictyosome filler two big classes.The dictyosome filler is made by wire, structure opening, and specific area is big, and hydrodynamic performance and mass-transfer performance are good, are material owing to adopt metal, exist shortcomings such as making institute's consumption material cost height, corrosion-vulnerable, easy obstruction.
The entity filler mainly contains ring packing, saddle type filler etc.Its material can adopt metal, plastics and pottery.Corrosion-resistant, cheap, characteristics such as wetability is good, Heat stability is good that pottery has, but its poor processability can only be made simple shape, compare with the filler of other material, specific area and voidage are all smaller, and flow resistance is big, mass-transfer performance is relatively poor, and its application has been subjected to certain restriction.The existing ceramic packing comparatively approaching with the present invention is Raschig ring, Pall ring and ring intalox filler.Raschig ring is the entity filler, contact between the filler is the line contact substantially, form hydrops easily, become the mass transfer dead band, simultaneously, because cavity in the ring, the outer line contact of ring blocks gas, liquid glide path easily, forms channel, makes liquid distribution inhomogeneous, especially during the filler traverse, the inner surface of ring is not easy wetted.Researchers are improved on the basis of Raschig ring, partition ring, inside spin ring etc. have been developed, Pall ring (Pall Ring) filler of second generation product has appearred being called as in Germany in 1948, Pall ring is to open the two-layer flattened rectangular window of system at the sidewall of Raschig ring, upper and lower window is staggered to be arranged, and the rectangular sheet of going out is retained in the ring and crowds around in the ring center.The surfaces externally and internally of Pall ring filler has been linked up in the ring wall perforate, has increased the effective wetting area of filler, has promoted the dispersion and the cohesion of liquid phase, has improved mass-transfer efficiency, has begun to have in perforate on the wall, the ring new era of the ring packing of tongue piece.Many researchers think that the ratio of height to diameter of ring-like filler will produce certain influence to the performance of filler.Ratio of height to diameter reduces, and it is flat that ring body becomes, and the filler center of gravity descends, and horizontally-arranged probability in bed reduces, and the resistance maximum of horizontally-arranged filler.The becket intalox saddle that occurred in 1978, this filler combines ring type structure and saddle type structure dexterously, the existing annulus that is similar to the ring-like filler of perforate, ring wall perforate and in the tongue piece stretched, the flange of saddle type both sides contacts with the point that the tooth-shape structure of bottom, two ends has increased between filler jointly, voidage between filler is increased, liquid converges with spaced point and increases, helping liquid upgrades at the distribution and the promotion liquid surface of filling surface, make the flux of filler increase, pressure drop reduces.The ring intalox filler integrates fluting filler Pall ring, saddle type filler, low ratio of height to diameter filler cascade ring three's advantage, has excellent comprehensive performances, is considered to a breakthrough of random packing, becomes the representative of random packing third generation product.
Emerge various novel random packings such as various flat-ring packing, conjugate ring filler etc. on this basis, but various modified random packings still are the entity filler, exist face contact or line contact during accumulation between the filler, cause that porosity is little, the gas-liquid channel area is little, problem such as cause that pressure drop is big in the mass transfer separation process, flux is low and mass-and heat-transfer efficient is low, because structure is open inadequately, the poor performance of liquid redistribution, unfavorable to mass transfer, also there are shortcomings such as complex structure cost of manufacture height.
Summary of the invention
The objective of the invention is to overcome and exist face contact or line contact between the existing ceramic packing, deficiencies such as voidage is low, specific area is little, bulk density is big, resistance is big, mass-transfer efficiency is low, a kind of structure opening is provided, bulk density is little, voidage is big, specific area is big, the foam ceramic annular filler that mass-transfer efficiency is high.
Purpose of the present invention reaches by following measure: adopt a kind of foam ceramic annular filler, be made up of torus and column type cavity, torus is made of the foamed ceramics with three-dimensional net structure.That is to say that the foamed ceramics flat-ring packing is a torus that inside is the column type cavity.Representing the diameter of foamed ceramics flat-ring packing with D, also is toric external diameter; D is the diameter of column type cavity, also is toric internal diameter; H represents the height of filler, also is toric height.It is that the foamed ceramics of 2mm～5mm is a base material that foam ceramic annular filler adopts the aperture, is processed into diameter and is D, highly is the cylinder of H, and open the cavity that diameter is d at cylindrical middle part.
The optimum value of the each several part physical dimension relation of foamed ceramics flat-ring packing is:
Ratio of height to diameter:
Boss ratio:
It is base material that the torus of filler of the present invention adopts foamed ceramics, and it has unique tridimensional network, is similar to the design feature of Composite board screen filler, these apertures communicate with filling surface, make the filler voidage reach 91%～94%, specific area is big, and bulk density is little.
Filling-material structure of the present invention is the annular of cavity in the middle of being, such filler, structure opening, increase filler and get porosity, can improve simultaneously the surface area of mass transfer, aggravate the turbulence of continuous phase and make decentralized photo have more uniform liquid-drop diameter, effectively improve the mass-transfer efficiency of packed tower, improve the Surface Renewal of gas-liquid contact and liquid film, reduce flow resistance and improve mass-transfer performance.
Filling-material structure adopt ratio of height to diameter 0.3～0.6 than the low ratio of height to diameter shape, shorten the move distance that fluid passes each filler, reduced the resistance drop of filler, strengthened surface wettability, the nonfluid that suppresses two-phase effectively flows, and further improves the disposal ability and the mass-transfer efficiency of filler.
Foamed ceramics is the porous ceramics of picture foam in a kind of moulding, it is the third generation porous ceramics product that grows up after common porous ceramics, honeycomb porous ceramics, the employing flex foam is a base material, be processed into required form, size, perfusion or dipping ceramic size, at high temperature sintering forms.The porosity of foamed ceramics is up to 70%～90%, has the three-dimensional communication duct, its shape, hole dimension, permeability, surface area and chemical property all can be carried out appropriateness and adjust be changed, and goods similarly are " by tempering foamed plastics " or " be magnetized cavernous body ".Because of it has big, the special and complicated cavity of voidage, very high specific area and unique physical surface properties, liquid is closed gas medium the selection permeability is arranged, and have that energy absorption is closed damping characteristic and ceramic material itself is distinctive high temperature resistant, corrosion-resistant, characteristics such as high chemical stability and dimensionally stable have caused the great attention of material circle.
Advantage of the present invention: filler of the present invention has had both the advantage of wire mesh packing and ring packing.Have design features such as cost is low, structure opening, bulk density is little, voidage is big, help improving mass-transfer efficiency, the reduction flow resistance of filler.
Description of drawings
Fig. 1 is the vertical view of filler of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
Adopt the foam ceramic annular filler of Ф 25mm, the foamed ceramics aperture of torus (1) is 2mm, and internal cavities (2) diameter is 10mm, and packed height 7.5mm, ratio of height to diameter are 0.3, and boss ratio is 0.4.
As shown in Figure 1 and Figure 2, it is material that the torus of foam ceramic annular filler (1) adopts foamed ceramics, has unique tridimensional network, be similar to the design feature of Composite board screen filler, these apertures communicate with filling surface, and specific area is big, and bulk density is little.
In the middle of the filling-material structure is cylindrical cavity (2), and such filling-material structure is open, helps further increasing the voidage of filler, reduces flow resistance, helps the renewal of filling surface simultaneously, improves mass-transfer efficiency.
Filling-material structure adopt ratio of height to diameter be 0.3 than the low ratio of height to diameter shape, shorten the move distance that fluid passes each filler, reduced the resistance drop of filler, strengthened surface wettability, the nonfluid that suppresses two-phase effectively flows, and further improves the disposal ability and the mass-transfer efficiency of filler.
Table 1 has been enumerated the characteristic of Ф 25mm Pall ring, rectangular saddle ring and present embodiment.As can be seen, for the identical several fillers of nominal size, voidage of the present invention is up to 91%, and than the Pall ring and the rectangular saddle ring height of identical material, in several fillers, the specific area of product of the present invention is the highest, the bulk density minimum.
Under identical test condition, the hydrodynamic performance and the mass-transfer performance of filler of the present invention and Pall ring, rectangular saddle ring are tested.Table 2, table 3 have been enumerated Ф 25mm Pall ring, rectangular saddle ring and hydrodynamic performance of the present invention and mass-transfer performance.As seen the fluid resistance of product of the present invention (being packing pressure drop) is 48～68% of ceramic Pall ring, a rectangular saddle ring, is 71～88% of stainless steel Pall ring, rectangular saddle ring, and this shows that fluid passes through the energy consumption reduction of packing layer.The height of transfer unit that present embodiment gets filler reduces by 30～40% than ceramic Pall ring, rectangular saddle ring, (height of transfer unit reduces to reduce by 10～20% than stainless steel Pall ring, rectangular saddle ring filler, mass-transfer performance is good more), this means that reaching the required bed stuffing height of production requirement reduces.
The geometrical property contrast table of table 1 filler of the present invention and 4 kinds of existing fillers (Ф 25mm)
| The filler title | The filling number n | Bulk density γ | Specific area α | Voidage ε |
| Individual/m 3 | ?kg/m 3 | ??m 2/m 3 | ??％ | |
| Filler of the present invention | ??90280 | ?234 | ??2175 | ??91 |
| The pottery Pall ring | ??49000 | ?575 | ??200 | ??76 |
| The pottery rectangular saddle ring | ??84600 | ?548 | ??250 | ??76 |
| The stainless steel Pall ring | ??49500 | ?480 | ??213 | ??94 |
| The stainless steel rectangular saddle ring | ??101160 | ?409 | ??186 | ??96 |
The hydrodynamic performance contrast table of table 2 filler of the present invention and 4 kinds of existing fillers
(every meter packing pressure drop Δ P/Z, Pa/m) relatively
| Sprinkle density m 3/(m 2·h) | ??40 | ????60 | ????80 |
| Superficial linear velocity in a column, m/s | ??1.58 | ????1.24 | ????0.96 |
| Filler Δ P/Z of the present invention, Pa/m | ??1850 | ????1658 | ????1486 |
| Pottery Pall ring Δ P/Z, Pa/m | ??2933 | ????2792 | ????2234 |
| Pottery rectangular saddle ring Δ P/Z, Pa/m | ??2633 | ????2592 | ????2167 |
| Stainless steel Pall ring Δ P/Z, Pa/m | ??2208 | ????2342 | ????1765 |
| Stainless steel rectangular saddle ring Δ P/Z, Pa/m | ??2108 | ????2042 | ????1694 |
Comparatively speaking, the filler of present embodiment has had both the advantage of wire mesh packing and ring packing.Have design features such as cost is low, structure opening, bulk density is little, voidage is big, help improving mass-transfer efficiency, the reduction flow resistance of filler.Can be useful for mass transfer separation processes such as the lower rectifying of gas-liquid flow, absorption and washing.
The mass-transfer performance contrast table of table 3 filler of the present invention and 4 kinds of existing fillers
(comparison of height of transfer unit, H
OL, 25 ℃, m)
| Filling kind | Sprinkle density m 3/(m 2·hr) | |||
| ??20 | ??40 | ??60 | ??80 | |
| Filler of the present invention, H OL，25℃，m | ??0.404 | ??0.416 | ??0.428 | ??0.435 |
| The pottery Pall ring, H OL，25℃，m | ??0.653 | ??0.625 | ??0.654 | ??0.657 |
| The stainless steel Pall ring, H OL，25℃，m | ??0.474 | ??0.516 | ??0.548 | ??0.550 |
| The pottery rectangular saddle ring, H OL，25℃，m | ??0.607 | ??0.615 | ??0.622 | ??0.625 |
| The stainless steel rectangular saddle ring, H OL，25℃，m | ??0.451 | ??0.488 | ??0.513 | ??0.521 |
Adopt the foam ceramic annular filler of Ф 50mm, the foamed ceramics aperture of torus (1) is 5mm, and the diameter of internal cavities (2) is 30mm, and packed height 20mm, ratio of height to diameter are 0.4, and boss ratio is 0.6.
The voidage of ceramic foam packing of the present invention is up to 94%, than the Pall ring and the rectangular saddle ring height of identical material, specific area 2156m
2/ m
3, bulk density only is 204kg/m
3The fluid resistance of ceramic foam packing of the present invention (being packing pressure drop) is less than several fillers of other same size, be 54～67% of ceramic Pall ring, rectangular saddle ring, be 67～75% of stainless steel Pall ring, rectangular saddle ring, this shows that fluid passes through the energy consumption reduction of packing layer.The height of transfer unit of filler of the present invention is compared with Pall ring, rectangular saddle ring, reduce by 20～30% than ceramic Pall ring, rectangular saddle ring, reduce by 15～20% than stainless steel Pall ring, rectangular saddle ring filler, this means that reaching the required bed stuffing height of production requirement reduces, applicable to the higher mass transfer separation process of gas-liquid flows such as rectifying, absorption.
Embodiment 3
The foam ceramic annular filler of Ф 50mm, the foamed ceramics aperture of torus (1) is 4mm, and internal cavities (2) diameter is 40mm, and packed height 30mm, ratio of height to diameter are 0.6, and boss ratio is 0.8.
The voidage of ceramic foam packing of the present invention is 94%, than the Pall ring and the rectangular saddle ring height of identical material, specific area 2016m
2/ m
3, bulk density only is 195kg/m
3The fluid resistance of ceramic foam packing of the present invention (being packing pressure drop) is less than several fillers of other same size, be 52～68% of ceramic Pall ring, rectangular saddle ring, be 71～85% of stainless steel Pall ring, rectangular saddle ring, this shows that fluid passes through the energy consumption reduction of packing layer.The height of transfer unit of filler of the present invention is compared with Pall ring, rectangular saddle ring, height of transfer unit of the present invention reduces by 20～30% than ceramic Pall ring, rectangular saddle ring, reduce by 20～25% than stainless steel Pall ring, rectangular saddle ring filler, this means that reaching the required bed stuffing height of production requirement reduces, applicable to the liquid-liquid extraction separation process.
Embodiment 4.
The foam ceramic annular filler of Ф 38mm, the foamed ceramics aperture of torus (1) is 3mm, and the diameter of internal cavities (2) is 19mm, and packed height 19mm, ratio of height to diameter are 0.5, and boss ratio is 0.5.
The voidage of ceramic foam packing of the present invention reaches 92%, than the Pall ring and the rectangular saddle ring height of identical material, specific area 2274m
2/ m
3, bulk density is 219kg/m
3The fluid resistance of ceramic foam packing of the present invention (being packing pressure drop) is less than several fillers of other same size, be 54～70% of ceramic Pall ring, rectangular saddle ring, be 68～82% of stainless steel Pall ring, rectangular saddle ring, this shows that fluid passes through the energy consumption reduction of packing layer.The height of transfer unit of filler of the present invention is compared with Pall ring, rectangular saddle ring, height of transfer unit of the present invention reduces by 20～30% than ceramic Pall ring, rectangular saddle ring, reduce by 15～20% than stainless steel Pall ring, rectangular saddle ring filler, applicable to the liquid-liquid extraction separation process.
Embodiment 5
The foam ceramic annular filler of Ф 50mm, the foamed ceramics aperture of torus (1) is 4mm, and the diameter of internal cavities (2) is 30mm, and packed height 20mm, ratio of height to diameter are 0.4, and boss ratio is 0.6.The voidage of ceramic foam packing of the present invention is up to 93%, than the Pall ring and the rectangular saddle ring height of identical material, specific area 2215m
2/ m
3, bulk density is 218kg/m
3The packing pressure drop of ceramic foam packing of the present invention is 62～80% of ceramic Pall ring, rectangular saddle ring less than several fillers of other same size, is 74～85% of stainless steel Pall ring, rectangular saddle ring.The height of transfer unit of filler of the present invention is compared with Pall ring, rectangular saddle ring, height of transfer unit of the present invention reduces by 15～25% than ceramic Pall ring, rectangular saddle ring, reduce by 10～15% than stainless steel Pall ring, rectangular saddle ring, this means that reaching the required bed stuffing height of production requirement reduces, applicable to the liquid-liquid extraction separation process.
Claims (4)
1, a kind of foam ceramic annular filler is characterized in that: described foam ceramic annular filler comprises torus (1) and column type cavity (2), and described torus (1) is made of the foamed ceramics with three-dimensional net structure.
2, foam ceramic annular filler according to claim 1 is characterized in that the foamed ceramics aperture that described foamed ceramics torus (1) adopts is 2mm～5mm.
3, according to claim 1 or 2 described foam ceramic annular fillers, the ratio of height to diameter that it is characterized in that foam ceramic annular filler is 0.3～0.6.
4, foam ceramic annular filler according to claim 3, the boss ratio that it is characterized in that foam ceramic annular filler is 0.4～0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100327048A CN100460055C (en) | 2005-01-13 | 2005-01-13 | Foam ceramic annular filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100327048A CN100460055C (en) | 2005-01-13 | 2005-01-13 | Foam ceramic annular filler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1676209A true CN1676209A (en) | 2005-10-05 |
| CN100460055C CN100460055C (en) | 2009-02-11 |
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ID=35049046
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100327048A Expired - Fee Related CN100460055C (en) | 2005-01-13 | 2005-01-13 | Foam ceramic annular filler |
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| CN (1) | CN100460055C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102530959A (en) * | 2011-12-30 | 2012-07-04 | 湖北犇星化工有限责任公司 | Silicon tetrachloride purification method and apparatus thereof |
| CN101405238B (en) * | 2006-02-01 | 2013-02-13 | 圣戈班欧洲设计研究中心 | Impregnated ceramic foam made of recrystallized silicon carbide |
| CN107138124A (en) * | 2017-05-18 | 2017-09-08 | 天津大学 | Asymmetric bicyclic foam random packing with inclination angle |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062249C (en) * | 1994-10-14 | 2001-02-21 | 吴连华 | Microporous porcelain filler of silicon-carbide series |
| CN1320566A (en) * | 2001-03-17 | 2001-11-07 | 刘端华 | Foamed ceramic filler |
| CN1456386A (en) * | 2002-05-09 | 2003-11-19 | 赵增典 | Foamed ceramic filler in chemical tower |
| EP1382590A3 (en) * | 2002-07-19 | 2004-06-30 | Erbicol SA | Open cell foam ceramic material |
-
2005
- 2005-01-13 CN CNB2005100327048A patent/CN100460055C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101405238B (en) * | 2006-02-01 | 2013-02-13 | 圣戈班欧洲设计研究中心 | Impregnated ceramic foam made of recrystallized silicon carbide |
| CN102530959A (en) * | 2011-12-30 | 2012-07-04 | 湖北犇星化工有限责任公司 | Silicon tetrachloride purification method and apparatus thereof |
| CN102530959B (en) * | 2011-12-30 | 2013-11-06 | 湖北犇星化工有限责任公司 | Silicon tetrachloride purification method and apparatus thereof |
| CN107138124A (en) * | 2017-05-18 | 2017-09-08 | 天津大学 | Asymmetric bicyclic foam random packing with inclination angle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100460055C (en) | 2009-02-11 |
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Granted publication date: 20090211 Termination date: 20140113 |