CN102908797A - Combined column plate with coupling of composite flow-through column plate and fiber bundle fillers - Google Patents

Combined column plate with coupling of composite flow-through column plate and fiber bundle fillers Download PDF

Info

Publication number
CN102908797A
CN102908797A CN2012104048049A CN201210404804A CN102908797A CN 102908797 A CN102908797 A CN 102908797A CN 2012104048049 A CN2012104048049 A CN 2012104048049A CN 201210404804 A CN201210404804 A CN 201210404804A CN 102908797 A CN102908797 A CN 102908797A
Authority
CN
China
Prior art keywords
dual
column plate
flow tray
vertical edge
flow
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.)
Granted
Application number
CN2012104048049A
Other languages
Chinese (zh)
Other versions
CN102908797B (en
Inventor
乔英云
田原宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Petroleum East China
Original Assignee
China University of Petroleum East China
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China University of Petroleum East China filed Critical China University of Petroleum East China
Priority to CN201210404804.9A priority Critical patent/CN102908797B/en
Publication of CN102908797A publication Critical patent/CN102908797A/en
Application granted granted Critical
Publication of CN102908797B publication Critical patent/CN102908797B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The invention provides a combined column plate with coupling of a composite flow-through column plate and fiber bundle fillers. According to the combined column plate, flow-through sieve plates, which have the same aperture ratio and arranged in a staggering way, are fixed at the upper part of the flow-through column plate with high aperture ratio; the whole combined column plate is arranged as individual blocks based on the H-shaped vertical side; the H-shaped vertical side serves as a supporting beam of the composite flow-through column plate; a vertical separating plate is added in an upper groove; the whole column plate is divided into a plurality of mixing tanks by the H-shaped vertical side and separating plates; the fiber bundle fillers which are 300 to 2500mm in height are positioned in a lower groove. With the adoption of the combined column plate, the space in the column is fully utilized, the vapor-liquid mass transfer condition of the flow-through column plate is improved, the pressure release of the column plate is reduced, the entrainment is reduced, the processing capacity of the flow-through column plate is improved, the operation flexibly and the separating efficiency are improved, a super-large supporting ring for the column plate is removed, the extreme demand on levelness in installation and the amplifying effect are also removed, the problem due to the large supporting structure of the column plate is solved as well as the problem due to the column plate, and large-scale columns are easy to obtain.

Description

The combined type column plate of compound dual-flow tray and the coupling of fibre bundle filler
Technical field
The present invention relates to the separation equipment field, the combined type column plate of espespecially a kind of compound dual-flow tray and the coupling of fibre bundle filler.
Background technology
At industrial departments such as petrochemical industry, petroleum refining, chemical industry, light industry, environmental protection, medicine and atomic energy, column plate and filler are widely used in the unit processes in chemical synthesis such as distillation, absorption, extraction, absorption, washing, cooling.Filler has the advantages such as separative efficiency height, pressure drop is little, disposal ability is large, but cost is larger, and operating flexibility is little, supporting tower internals is required high; Large, the anti-obstruction of operating flexibility of tray, cost is low, separative efficiency is relatively large, but pressure drop will be larger, and disposal ability is lower.Column plate is by having or not downspout can be divided into overflow-type column plate and throngh flowing type tray, and by contrast, existing throngh flowing type tray is simple in structure, and space availability ratio is high in the tower, and cost is low, and disposal ability is large, but vapour-liquid is short time of contact, and mass-transfer efficiency is low, and operating flexibility is little.Desirable tower internals should have low pressure drop, high efficiency, large operating flexibility, anti-obstruction, low cost, large disposal ability and the high characteristic of Ta Nei space availability ratio simultaneously.With column plate and filler compound be one of the effective way of tower internals of realizing ideal.The fibre bundle filler is the high surface linked network formula flexible filler that a kind of recently liquid phase of exploitation is continuous phase, and the liquid flooding high cycle speed reaches more than the 8m/s, and mass-transfer efficiency is high, and pressure drop only is the 1/2-1/3 of common structured packing.
Compound overflow-type column plate compounded mix and the throngh flowing type tray compounded mix of mainly containing of column plate and filler because throngh flowing type tray is simple in structure, to be easy to filler compound, is ideal column plate filler complex form.But existing dual-flow tray compounded mix, because the liquid flooding of structured packing is restricted the elasticity of composite plate and load-bearing capacity.The patent CN101480537 that declares such as the inventor has mentioned a kind of novel turbogrid type composite column plate adopts increases identical percent opening on the dual-flow tray sieve plate, the high structured packing of one deck 0-250mm is set below dual-flow tray, take full advantage of space in the tower, increase air-flow time of contact, air-flow mixing intensity and interface renewal rate have been strengthened, improve plate efficiency, simultaneously because the existence of sieve plate makes the percent opening can be up to 60%, greatly improve disposal ability and the operating flexibility of column plate, reduced plate pressure drop and entrainment; Throngh flowing type tray serves as the liquid distribution trough of structured packing effectively, liquid is laterally mixed reach the desired perfect condition of filler; Conversely, the gas distributor of column plate has been served as again in structured packing, further improves the vapour-liquid mass situation, has rationally effectively utilized the advantage of column plate and filler.But because the liquid flooding gas speed of structured packing is lower, maximum void tower kinetic energy factor is less than 3(m/s) .(kg/m3) 1/2, become turbogrid type composite column plate and further carry high-throughout bottleneck.
Summary of the invention
Purpose of the present invention is exactly the combined type column plate that a kind of compound dual-flow tray and the coupling of fibre bundle filler are provided for the deficiency that overcomes the existence of turbogrid type composite column plate technology.
Technical scheme of the present invention:
The objective of the invention is the dual-flow tray by fixing identical percent opening, wrong row on high opening rate dual-flow tray top; Carry out sectional type with H shape vertical edge and install, H shape vertical edge is as column plate self brace summer, and upper groove installs vertical partition plate additional, and H shape vertical edge and dividing plate are divided into groove under a plurality of mixing pits with whole column plate and arrange that the high fibre bundle filler of 300~2500mm realizes.It can take full advantage of space in the tower, improve the vapour-liquid mass situation of dual-flow tray, reduce plate pressure drop, reduce entrainment, improve disposal ability, operating flexibility and the separative efficiency of dual-flow tray, the harshness of eliminating column plate large bracing ring and installation level requires and enlarge-effect; Solve a column plate large supporting construction difficult problem and column plate strength problem, be easy to realize that tower maximizes.
The combined type column plate of a kind of compound dual-flow tray of the present invention and the coupling of fibre bundle filler comprises dual-flow tray, dual-flow tray, a plurality of H shape vertical edge, a plurality of dividing plate and fibre bundle filler; The percent opening of sieve aperture is 20~60% on the described dual-flow tray, and the distance of 3~8mm is provided with the described dual-flow tray of identical percent opening and hole shape by a plurality of fixed legs at an upper portion thereof; Described sieve aperture is φ 15 ~ φ 30mm circular hole or perforated area suitable diamond hole, square hole and polygon hole; The wrong row of sieve aperture on the described dual-flow tray and the sieve aperture of described dual-flow tray or half wrong row; Described compound dual-flow tray carries out sectional type with H shape vertical edge to be installed, and H shape vertical edge is as column plate self brace summer; Described H shape vertical edge and dual-flow tray surround each on groove install the described dividing plate of a plurality of vertical placements additional, described H shape vertical edge and dividing plate are divided into a plurality of mixing pits with compound dual-flow tray; Each time groove that described H shape vertical edge and dual-flow tray surround hangs the high fibre bundle filler of one deck 300~2500mm by the lower vertical edge of H shape vertical edge; During installation, fix with bolt with the upper vertical edge of H shape vertical edge between the two boards of described compound dual-flow tray, fix by connector between compound dual-flow tray and the bracing ring.
According to above-mentioned design, described fibre bundle filler is formed at fixed mount with rhombus or square pattern woollen yarn knitting by 15000-30000 root filament, and the filament diameter is 0.001-0.01mm.
The combined type column plate of the compound dual-flow tray that the present invention proposes and the coupling of fibre bundle filler, owing to adopt on the high opening rate dual-flow tray and put sieve plate, carrying out sectional type with H shape vertical edge installs, upper groove installs vertical partition plate and lower groove suspended fiber bundles filler additional, take full advantage of space in the tower, increase at double air-flow time of contact, air-flow mixing intensity and contact interface renewal rate have been strengthened, liquid flooding gas speed and plate efficiency have been improved, reduced plate pressure drop, reduce entrainment, beat the flux that has improved dual-flow tray, disposal ability, operating flexibility and separative efficiency, the harshness of eliminating column plate large bracing ring and installation level requires and enlarge-effect; Compound dual-flow tray serves as the liquid distribution trough of fibre bundle filler effectively, liquid is laterally mixed reach the desired perfect condition of filler; Conversely, the fibre bundle filler has served as again the gas distributor of column plate, further improves the vapour-liquid mass situation, has realized the coupling of dual-flow tray and fibre bundle filler, solves a column plate large supporting construction difficult problem and column plate strength problem.
Description of drawings
Fig. 1 is the structural representation of facing of combined column plate of the present invention;
Fig. 2 is the plan structure schematic diagram of combined column plate of the present invention;
Fig. 3 is the fixed rack structure figure of fibre bundle filler square pattern;
Fig. 4 is the fixed rack structure figure of fibre bundle filler diamond pattern.
Description of reference numerals
1. 32 times grooves of groove on dual-flow tray 2. dual-flow tray 3.H shape vertical edges 4. dividing plates 5. fixed legs 6. bolts 7. connectors 8. fibre bundle fillers 9. filaments 10. fixed mounts 31.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further details.
Embodiment 1, and as shown in Figure 1 and Figure 2, the present invention is assembled into column plate by the compound dual-flow tray of several strips.Compound dual-flow tray is by dual-flow tray 1, and dual-flow tray 2, H shape vertical edge 3 and dividing plate 4 form, and dual-flow tray 1 is the thick flat board of 2~10mm, has the diameter of percent opening 20~60% or circular hole or the diamond hole of equivalent diameter 20mm on it; Be fixed with the dual-flow tray 2 of identical percent opening and hole shape in the high distance of dual-flow tray 1 top 3~8mm by a plurality of fixed legs 5, fixed leg 5 and dual-flow tray 1 are connected with dual-flow tray and are can be welding and also can be bolt and be connected.Dual-flow tray 2 thicknesss of slab are 2~10mm; The wrong row of sieve aperture on dual-flow tray 2 and the dual-flow tray 1 or diamond hole or the wrong row of part.H shape vertical edge 3 vertically is fixed on dual-flow tray 1 and dual-flow tray 2 two ends, H shape vertical edge about in the of 3 two ends all above dual-flow tray 1 and dual-flow tray 2, compound dual-flow tray is welded into the structure that cross section is H shape by H shape vertical edge 3 and middle dual-flow tray 1 and dual-flow tray 2, H shape vertical edge 3 surrounds groove 31 on top and dual-flow tray 2, surrounds lower groove 32 in bottom and dual-flow tray 1.Compound dual-flow tray can carry out sectional type to be installed, and H shape vertical edge 3 is as piecemeal column plate self brace summer.Vertical partition plate 4 is installed in welding additional in the upper groove 31 of compound dual-flow tray H shape, and H shape vertical edge 3 and dividing plate 4 are divided into a plurality of mixing pits with whole column plate; Pass through the high fibre bundle filler 8 of lower vertical edge suspension one deck 2500mm of H shape at the lower groove 32 of compound dual-flow tray H shape, the space height is 100mm between compound dual-flow tray and the fibre bundle filler 8, and every bundle fiber filler beam 8 is formed at fixed mount 10 with the diamond pattern woollen yarn knitting by 20000 filaments 9.As shown in Figure 3, fixed mount 10 is the grid beam of diamond-mesh, be welded by the metal tube of both sides and intermediate mesh iron wire or iron plate, the metal tube of both sides and H shape vertical edge 3(outermost are the bottoms that is connected in connector 7) following welding or be spirally connected by screw, intermediate mesh iron wire or iron plate intersection are node, and each grid node is provided with for the support of anchoring fiber filler beam 8 or hole.Fixed mount 10 is fixed in the downside of H shape vertical edge 3, and filament 9 diameters are 0.001-0.01mm; Use bolt 6 fixing by the upper vertical edge of H shape vertical edge 3 between the two boards of compound dual-flow tray during installation.
As mentioned above, middle compound dual-flow tray piecemeal is that cross section is the structure (these dual-flow tray 1 two ends are fixed by the bracing ring of whole circle on connector 7 and the outer wall) of H shape, and the compound dual-flow tray piecemeal that the both sides outermost is connected with outer wall, H shape vertical edge 3 is no longer established in the outside, only finish fixing by inboard H shape vertical edge 3 and fixed leg 5, the structure that the compound dual-flow tray cross section in the outside is T shape, dual-flow tray 1 is wherein fixed by the bracing ring of whole circle on connector 7 and the outer wall, connector 7 is fastener in the standard tower of existing column plate, just in this case, it is smaller that the outer rim of the dual-flow tray 2 on top is compared dual-flow tray 1, so that assembly and connection spare 7.Certainly also can be made as by dual-flow tray 2 and connect bracing ring and connector 7.
Embodiment 2, can be with reference to Fig. 1, Fig. 2, the compound dual-flow tray of the present invention is comprised of dual-flow tray 1, dual-flow tray 2, H shape vertical edge 3 and dividing plate 4, and dual-flow tray 1 is the thick flat board of 2~10mm, have percent opening on it and be wide 6~20mm of 20~60%, the bar hole of long 30~200mm; At the dual-flow tray 2 of 3~8mm high distance in dual-flow tray 1 top by a plurality of fixed legs 5 fixing identical percent openings and hole shape, fixed leg 5 and dual-flow tray 1 are connected with dual-flow tray and are can be welding and also can be bolt and be connected.Dual-flow tray 2 thicknesss of slab are 2~10mm; The wrong row of bar hole on dual-flow tray 2 and the dual-flow tray 1 or the wrong row of part.H shape vertical edge 3 vertically is fixed on dual-flow tray 1 and dual-flow tray 2 two ends, H shape vertical edge about in the of 3 two ends all above dual-flow tray 1 and dual-flow tray 2, compound dual-flow tray is welded into the structure that cross section is H shape by H shape vertical edge 3 and middle dual-flow tray 1 and dual-flow tray 2, H shape vertical edge 3 surrounds groove 31 on top and dual-flow tray 2, surrounds lower groove 32 in bottom and dual-flow tray 1.Compound dual-flow tray can carry out sectional type to be installed, and H shape vertical edge 3 is as compound dual-flow tray self brace summer, and vertical partition plate 4 is installed in welding additional in the upper groove 31 of compound dual-flow tray H shape, and H shape vertical edge 3 and dividing plate 4 are divided into a plurality of mixing pits with whole column plate; Pass through the high fibre bundle filler 8 of lower vertical edge suspension one deck 500mm of H shape vertical edge 3 at the lower groove 32 of compound dual-flow tray H shape, the space height is 50mm between compound dual-flow tray and the fibre bundle filler 8, and every filler beam is formed at fixed mount 10 with the square pattern woollen yarn knitting by 25000 filaments 9.As shown in Figure 4, fixed mount 10 is the grid beam of square mesh, be welded by the metal tube of both sides and intermediate mesh iron wire or iron plate, the metal tube of both sides and H shape vertical edge 3(outermost are the bottoms that is connected in connector 7) following welding or be spirally connected by screw, intermediate mesh iron wire or iron plate intersection are node, and each grid node is provided with for the support of anchoring fiber filler beam 8 or hole.Fixed mount 10 is fixed in the downside of H shape vertical edge 3, and filament 9 diameters are 0.001-0.01mm; Use bolt 6 fixing by the upper vertical edge of H shape vertical edge 3 between the two boards of compound dual-flow tray during installation, fixing by connector 7 between compound dual-flow tray and the bracing ring.
Combined type column plate cold mould measuring through the laboratory of compound dual-flow tray proposed by the invention and fibre bundle coupling, void tower kinetic energy factor 0.3-6(m/s) .(kg/m3) 1/2In the scope, the column plate point efficiency surpasses 98%, is higher than common dual-flow tray more than 43%, and pressure drop is less than 300Pa, and is suitable with the filler pressure drop of the height equivalent to one theoretical plate (HETP); Maximum void tower kinetic energy factor is up to 7(m/s) .(kg/m3) 1/2More than, operating flexibility is 6, disposal ability improves more than 4 times.
As known by the technical knowledge, the present invention can realize by other the embodiment that does not break away from its Spirit Essence or essential feature.Therefore, above-mentioned disclosed embodiment with regard to each side, all just illustrates, and is not only.All within the scope of the present invention or the change within being equal to scope of the present invention all be included in the invention.

Claims (2)

1. the combined type column plate of a compound dual-flow tray and fibre bundle filler coupling is characterized in that, comprises dual-flow tray, dual-flow tray, a plurality of H shape vertical edge, a plurality of dividing plate and fibre bundle filler; The percent opening of sieve aperture is 20~60% on the described dual-flow tray, and the distance of 3~8mm is provided with the described dual-flow tray of identical percent opening and hole shape by a plurality of fixed legs at an upper portion thereof; Described sieve aperture is φ 15 ~ φ 30mm circular hole or perforated area suitable diamond hole, square hole and polygon hole; The wrong row of sieve aperture on the described dual-flow tray and the sieve aperture of described dual-flow tray or half wrong row; Described compound dual-flow tray carries out sectional type with H shape vertical edge to be installed, and H shape vertical edge is as column plate self brace summer; Described H shape vertical edge and dual-flow tray surround each on groove install the described dividing plate of a plurality of vertical placements additional, described H shape vertical edge and dividing plate are divided into a plurality of mixing pits with compound dual-flow tray; Each time groove that described H shape vertical edge and dual-flow tray surround hangs the high fibre bundle filler of one deck 300~2500mm by the lower vertical edge of H shape vertical edge; During installation, fix with bolt with the upper vertical edge of H shape vertical edge between the two boards of described compound dual-flow tray, fix by connector between compound dual-flow tray and the bracing ring.
Compound dual-flow tray according to claim 1 and fibre bundle filler the coupling the combined type column plate, it is characterized in that, described fibre bundle filler is formed at fixed mount with rhombus or square pattern woollen yarn knitting by 15000-30000 root filament, and the filament diameter is 0.001-0.01mm.
CN201210404804.9A 2012-10-22 2012-10-22 Combined column plate with coupling of composite flow-through column plate and fiber bundle fillers Active CN102908797B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210404804.9A CN102908797B (en) 2012-10-22 2012-10-22 Combined column plate with coupling of composite flow-through column plate and fiber bundle fillers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210404804.9A CN102908797B (en) 2012-10-22 2012-10-22 Combined column plate with coupling of composite flow-through column plate and fiber bundle fillers

Publications (2)

Publication Number Publication Date
CN102908797A true CN102908797A (en) 2013-02-06
CN102908797B CN102908797B (en) 2014-01-15

Family

ID=47607515

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210404804.9A Active CN102908797B (en) 2012-10-22 2012-10-22 Combined column plate with coupling of composite flow-through column plate and fiber bundle fillers

Country Status (1)

Country Link
CN (1) CN102908797B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106730970A (en) * 2017-03-22 2017-05-31 中国石油大学(华东) A kind of dual-flow tray takes the decompression tower internals of thermal coupling with spray
CN111530114A (en) * 2020-06-16 2020-08-14 上海化工研究院有限公司 Rectification system, semi-continuous rectification method and application thereof
CN111659149A (en) * 2020-06-16 2020-09-15 上海化工研究院有限公司 Rectifying tower, rectifying system and application thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1383218A (en) * 1971-06-05 1975-02-05 Kansai Kagaku Kikai Seisaku Kk Method and apparatus for contacting and or dispersing fluids and other materials
JPS53118274A (en) * 1977-03-25 1978-10-16 Kansai Kagaku Kikai Seisaku Kk Layer type gassliquid contact tray
CN2657758Y (en) * 2003-10-20 2004-11-24 北京欣博通创新能源技术开发有限公司 High-efficient contact fiber type filler tower
KR20070016339A (en) * 2005-08-03 2007-02-08 (주)에이엠티퍼시픽 The flag misfortune contacting device for the dosage augmentation of Ul flow right Tray
CN101480537A (en) * 2008-01-11 2009-07-15 山东科技大学 Novel turbogrid type composite column plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1383218A (en) * 1971-06-05 1975-02-05 Kansai Kagaku Kikai Seisaku Kk Method and apparatus for contacting and or dispersing fluids and other materials
JPS53118274A (en) * 1977-03-25 1978-10-16 Kansai Kagaku Kikai Seisaku Kk Layer type gassliquid contact tray
CN2657758Y (en) * 2003-10-20 2004-11-24 北京欣博通创新能源技术开发有限公司 High-efficient contact fiber type filler tower
KR20070016339A (en) * 2005-08-03 2007-02-08 (주)에이엠티퍼시픽 The flag misfortune contacting device for the dosage augmentation of Ul flow right Tray
CN101480537A (en) * 2008-01-11 2009-07-15 山东科技大学 Novel turbogrid type composite column plate

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106730970A (en) * 2017-03-22 2017-05-31 中国石油大学(华东) A kind of dual-flow tray takes the decompression tower internals of thermal coupling with spray
CN106730970B (en) * 2017-03-22 2023-11-21 中国石油大学(华东) Vacuum tower internal part of heat-taking coupling through-flow column plate and spraying
CN111530114A (en) * 2020-06-16 2020-08-14 上海化工研究院有限公司 Rectification system, semi-continuous rectification method and application thereof
CN111659149A (en) * 2020-06-16 2020-09-15 上海化工研究院有限公司 Rectifying tower, rectifying system and application thereof
CN111659149B (en) * 2020-06-16 2021-10-08 上海化工研究院有限公司 Rectifying tower, rectifying system and application thereof

Also Published As

Publication number Publication date
CN102908797B (en) 2014-01-15

Similar Documents

Publication Publication Date Title
CN101480537B (en) Novel turbogrid type composite column plate
CN101806161B (en) Space net rack supporting device in large-scale tower
CN102908797B (en) Combined column plate with coupling of composite flow-through column plate and fiber bundle fillers
CN104492115A (en) Zigzag tower plate
CN100460050C (en) Fluidised bed gas and solid contacting device
CN202555257U (en) Radial or axial-radial fixed bed reactor with support type slotted hole plate distributor
CN104524802A (en) Multistage baffle cap column plate
CN101279225B (en) Filter device in gas-liquid co-current flow fixed bed reactor
CN204685110U (en) A kind of novel plug filler of loading catalyst
CN102580624A (en) Radial or axial radial fixed bed reactor with support type slot plate distributor
EP2554228A1 (en) Cross-flow and baffled-flow composite gasoline fractionator of ethylene production equipment
CN101279226B (en) Filter device in gas-liquid co-current flow fixed bed reactor
CN102847416B (en) Groove-disc type liquid redistributor with circularly arranged downcomers
CN204320263U (en) A kind of liquid-gas oxidation reactor
CN101745244B (en) Tower plate bearing structure of large-scale cross-flow plate type tower
CN1131087C (en) Catalytic rectifying tower
CN201171919Y (en) Novel percolation type composite column plate
CN111013178B (en) Stepped liquid circulation bubble tower and method for dispersing gas
CN102974116B (en) Overflow support device for large-scale plate tower
CN1065446C (en) Parallel jet compounding tower
CN101844965B (en) Heat exchange device for methanol synthesis reactor
CN100490963C (en) Fluidised bed gas-solid contacting device
CN101711962A (en) Catalytic conversion stripper
CN102935293B (en) Ultra-large high-efficiency high-operation-flexibility high-throughput anti-blocking composite flow-through tray
CN104492113A (en) Arc-shaped cover hood tower plate

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant