CN1048414C - Mixed box tower plate - Google Patents
Mixed box tower plate Download PDFInfo
- Publication number
- CN1048414C CN1048414C CN97107059A CN97107059A CN1048414C CN 1048414 C CN1048414 C CN 1048414C CN 97107059 A CN97107059 A CN 97107059A CN 97107059 A CN97107059 A CN 97107059A CN 1048414 C CN1048414 C CN 1048414C
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- Prior art keywords
- column plate
- plate
- tower
- bunch
- casing
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- Expired - Fee Related
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- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims description 8
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims description 2
- 238000013461 design Methods 0.000 description 15
- 230000004907 flux Effects 0.000 description 15
- 239000007791 liquid phase Substances 0.000 description 9
- 238000012546 transfer Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000008258 liquid foam Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010019133 Hangover Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- DALDUXIBIKGWTK-UHFFFAOYSA-N benzene;toluene Chemical compound C1=CC=CC=C1.CC1=CC=CC=C1 DALDUXIBIKGWTK-UHFFFAOYSA-N 0.000 description 1
- FFQYMTMKMLRXLJ-UHFFFAOYSA-N cyclohexanol;phenol Chemical compound OC1CCCCC1.OC1=CC=CC=C1 FFQYMTMKMLRXLJ-UHFFFAOYSA-N 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The present invention relates to a mixed box tower plate of a separating tower. The tower plate is provided with an overflow weir and a down spout, a plurality of sieve holes are arranged on the tower plate and are arranged according to groups, 2 to 10 sieve meshes are arranged into a hole group, a box-shaped mixing box without a bottom is covered on each hole group, the box body is fixed on the tower plate by using two to four thin supporting feet, the top of the mixing box body is sealed, a steam outlet is arranged on one side of the box body, the direction of the steam outlet is consistent with the direction of liquid flow on the tower plate, and two guide plates are respectively arranged on the upper part and the lower part of the steam outlet. The efficiency of the tower plate is approached to 1, and distance among plates is reduced by using the mixed box tower plate of the present invention.
Description
The present invention relates to the plate separation tower that chemical separating is used.
Plate column has good anti-clogging, decay resistance and under high pressure still can keep than characteristics such as high separating efficiencies, and these general just novel packed towers are lacked.Therefore in chemical separating industries such as chemical fertilizer, petrochemical industry, fine chemistry industry, environmental protection, plate column is still a kind of widely used mass transfer and separation equipment.But the percent opening of plate column column plate is limited, and it is big that the pressure drop ratio novel packed tower is wanted, and treating capacity also is affected.Therefore the high efficiency packing of researching and developing big flux, low pressure drop and high efficiency column plate and Development of New Generation is the same to have important theory and realistic meaning.In fact, the research of this respect is rich in the world, domestic achievement.For example, the Superfrac column plate of U.S. Glitsch company exploitation; The synergy of American UOP company and increase-volume multiple-downcomer (MD) column plate; And the New Vertical Sieve Tray of exploitations such as domestic Northwestern Polytechnical University, Hebei University of Technology and Tsing-Hua University; 95 type column plates of the suspended downcomer column plate of wash rice river polytechnical university and Nanjing University etc. all are good examples.
Plate column has polytype, as bubble column, sieve-plate tower, valve tower, tongue type plate column, percolation grid orifice-plate type tower and eddy flow plate column or the like.The column plate of plate column can be divided into downspout and no downspout (turbogrid tray) two big classes.Have the downspout column plate that single downspout and multiple-downcomer type are arranged again, the application belongs to a kind of novel downspout type plate column that has.
The structure that tradition has a downspout column plate as shown in Figure 1, the column plate that becomes level with tower tube axis is installed in column type tower tube at a certain distance, the both sides of column plate are respectively downspout and liquid flooding weir, install elements such as bubble-cap, float valve on the column plate, or be split into sieve aperture according to certain rules and promptly be called bubble column, valve tower and sieve-plate tower etc.Yet, all plate columns up to now, regardless of its template, all more or less have contradiction aspect following two in design and industrial operation: (1) flux strengthens the contradiction that descends with plate efficiency.Flux improves, and plate efficiency descends, and means and has to sacrifice product quality, otherwise should improve capacity of returns to keep due effect, has so just strengthened energy consumption or operating cost.This common fault is perplexing design and producers always.(2) contradiction of flux increasing and distance between plates.Flux strengthens, and column plate Shanghai Automobile Factory speed improves, and must drive liquid phase and rise together, causes the liquid foam entrainment amount significantly to increase.Liquid foam entrainment, promptly axial backmixing of liquid phase.In order to reduce the liquid foam entrainment amount, keep original mass transfer of column plate and separating effect, have to strengthen distance between plates, cause body of the tower to increase, construction investment strengthens.To stainless steel, and diameter is big, the more tower of plate number, and the increase that strengthens the investment that distance between plates caused is often in 1,000,000 U.S. dollars, and this is that manufacturer is difficult to accept.In addition, how to make that liquid flow and steam flow direction are in comparatively ideal state on the column plate; How to avoid vapour, backmixing of liquid phase as far as possible; How reducing plate pressure drop and improve vapour on the column plate, the effective mass transfer area of liquid etc. to greatest extent, all is the place that is worth paying special attention in the plate column design, also is the emphasis problem that the present invention will solve.
The inventor once proposed at above-mentioned present situation and had developed 95 type column plates (number of patent application ZL97106964.6), and structure as shown in Figure 2.It adopts the hanging downcomer of selenodont downflow weir and pipe Caudad tower wall opening.The design of employing selenodont downflow weir can reduce the non-mass-transfer zone area I (Fig. 1) in traditional column plate, and it is controlled at about 5%; And the non-mass-transfer zone area II (Fig. 1) in traditional column plate has been eliminated in hanging downcomer design fully, accounts for about 95% of the column plate gross area thereby vapour, the liquid mass-transfer zone area of whole column plate are brought up to, so be called 95 type column plates.The comparable traditional column plate of the flux of 95 type column plates improves 10-25%, and mass-transfer efficiency also given full play to, and generally improves 5-10% than traditional column plate.Yet 95 type column plates do not consider how to strengthen the problem that increases substantially plate efficiency under the flux situation as yet comprehensively.
The column plate that the purpose of this invention is to provide a kind of knockout tower, the element on this column plate make column plate under the situation of big flux, and higher plate efficiency is arranged, and under the situation of big flux, overcome the liquid foam entrainment phenomenon, thereby can reduce the distance between column plate.
Technical scheme of the present invention is as follows;
A kind of plate separation tower column plate, column plate has downflow weir and downspout, have a plurality of sieve apertures on the column plate, screen-aperture is 3-20mm, and sieve aperture is by bunch arrangement, 2-10 sieve aperture is arranged in one group of hole bunch regularly, preferably 4-8 sieve aperture is arranged in one group of hole bunch, is covered with the blending bin of a no under casing shape above every hole group bunch, and casing is fixed on the column plate with 2-4 tiny feet, the height of feet makes casing can touch the liquid level of overflowing liquid on the column plate, the height H of feet
pCan be 0.2h
w≤ H
p≤ 1.5h
w(h
wBe height of weir plate), highly be 0.8h preferably
w≤ H
p≤ 1.1h
wMix the casing top seal, side at casing has venthole, the direction of venthole is consistent with liquid flow path direction A on the column plate, there is a deflector that outwards stretches the top of venthole, there is a deflector that inwardly stretches the below of venthole, upper and lower deflector respectively becomes 10-80 ° angle with the casing side, and preferred angle is 20-60 ° of blending bin venthole net sectional area S
B(referring to that two beelines between the deflector multiply by A/F) is sieve aperture gross area S in the hole bunch
H1-5 doubly, preferred S
B=2-4S
HThe shape that sieve aperture is arranged in the hole bunch can be square, regular pentagon, regular hexagon, and corresponding mixing casing is tetragonal body, positive pentagonal prism body, hexagonal prism or cylinder.Can there be a sieve aperture at the center of every kind of shape.Average pitch of holes t ' and aperture d in one group of hole bunch
oRatio be t '/d
o=1.5-5, preferred t '/d
oBe 2-4.The arrangement mode in hole bunch and hole bunch can be to be staggered, and also can be to be arranged in parallel, to be staggered to good.Between hole bunch and bunch edge, hole apart from t
cCan adopt two kinds of method designs, a kind of is equidistant design, i.e. t
cEqual or be slightly larger than largest hole spacing t ' in one group of hole bunch
Max, but less than 100mm, this kind design relatively is applicable to and is staggered; Another kind is non-equidistance design, promptly along the spacing t of liquid flow path direction
CxGreater than spacing t perpendicular to the liquid flow path direction
Cy, t
Cx-t
Cy=1-30mm is advisable, preferably t
Cx-t
Cy=5-20mm is suitable for being arranged in parallel.
The downflow weir of plate column column plate of the present invention can be the crescent downflow weir, and decompression tube is the hanging downcomer of pipe Caudad tower wall opening.For diameter is traditional column plate of D, and wide as if downflow weir is W
d, long l
w, high h
w, then for the column plate of the present invention of identical tower diameter, the design of downflow weir can be inherited the regulation of 95 type column plates, promptly generally is taken as 0.5W
d≤ W
d'≤0.8W
dWith 0.2 π D≤l
w'≤0.4 π D, h
w'=h
WoW
d', l
w' size final determined to follow selenodont downcomer region area occupied and generally is not more than 5% of tower cross-sectional area and is advisable.The selection of downspout hangover place A/F b should make the certain clear liquid layer height of maintenance in the downspout, and computing formula is:
In the formula: L
sBe liquid phase volume flow, m
3/ s; C
dIt is discharge coefficient; G is an acceleration of gravity, 9.81m/s
2h
oBe resistance pressure drop, the m fluid column.
Adopt separating tower column plate of the present invention, when steam flow passes hole bunch and rises, because steam flow has certain speed and kinetic energy, just the liquid that drives around the hole bunch leaves column plate together, form vapour-liquid mixed flow thigh, this stream through fully stirring, mixing, realizes that vapour-liquid contacts fully in the blending bin space strand in blending bin, mass transfer and heat transfer.Because the incline direction of blending bin deflector can make partially liq import the column plate liquid level again under the effect of steam flow, to incorporate among the liquid stream main body, vapour phase is then automatically and liquid phase separation and rise to the lastblock column plate.The mixed box tower plate structure is compared with traditional column plate, mainly contain the advantage of the following aspects: (1) is in each blending bin, the vapour-liquid two-phase is before realizing separation, because full contact, they approach thermodynamics VLE state basically, this kind result means that the vapour-liquid mass effect increases substantially, and promptly plate efficiency will approach 1.(2) effect by blending bin, the vapour-liquid mass district is expanded in three dimensions fully and utilizes, and by standard steam flow direction, not only increased the flow process of vapour phase after leaving liquid level, prolonged the time of contact of time of staying of vapour phase and vapour, liquid phase, and the liquid foam carried secretly to separate it of the kinetic energy that can make full use of vapour phase, reduced axial backmixing of liquid phase widely, distance between plates is had significantly than traditional design to be reduced, thereby will save construction investment greatly, the range of decrease can reach 20-40%.(3) steam flow of oblique ejection at a certain angle has certain motive force to liquid level, is equivalent to guide functions, and liquid level drop is reduced, thereby has reduced the radially back-mixing of pressure drop and liquid phase effectively.(4) because the feet of blending bin is tiny, and the blending bin bottom is almost equal with liquid level, makes that the liquid phase on the plate face flows unimpeded; (5) because the venthole area of blending bin accounts for 2-4 times of its coverage hole bunch area, so the pressure drop that blending bin itself causes is very little.Under the situation of big flux, the mixed box tower plate design feature can make column plate show more outstandingly in the performance of aspects such as efficient, low pressure drop, big flux, low investment, and its industrial significance is fairly obvious.
Description of drawings:
Fig. 1 is traditional sieve plate Tata plate schematic diagram;
Fig. 2 is 95 type separating tower column plate schematic diagrames;
Fig. 3 is the mixed box tower plate schematic diagram;
Fig. 4 is a mixed box tower plate hole bunch arrangement schematic diagram;
Fig. 5 is the blending bin structural representation of mixed box tower plate;
Embodiment one: the alcohol-water separation system.Former tower diameter D=600mm adopts traditional aperture sieve plate, and single overflow type, tray spacing are H
T=450mm, the long l in the weir of chord downcomer
w=440mm, width W
d=103mm, downspout and overflow area area occupied are 22.04% of full tower cross-sectional area.After adopting Fig. 3, Fig. 4, tower plate structure of the present invention shown in Figure 5, be the single overflow type still, distance between plates is constant, and downflow weir is long to be 450mm, and width is 31mm, and height is 35mm.The downspout afterbody adopts straight line to intersect the type connection, and its bottom is apart from plate height h
1=30mm.The column plate aperture changes d into
o=Φ 8mm, 5 hole clusters, t '=3d
o, the design that is staggered of the square unequal-interval of center drilling, t are adopted in hole bunch
Cx=3.5d
o, t
Cy=3d
oThe structural parameters of blending bin are: H
B=80mm, L
B=W
B=45mm, H
P=h
w=35mm, S
B=3S
H, θ
1=θ
2=40 °.Measure demonstration, the disposal ability of tower shown in the present (flux) improves 45.5% than former tower, and ethanol content reduces by 54.5% than former tower at the bottom of the tower.Average plate efficiency brings up to 92.3% by original about 60%.Keeping under identical separation requires, flux has raising by a relatively large margin, and reflux ratio can be reduced to original half.
Embodiment two: benzene-toluene rectifying.Tradition sieve plate single overflow type, D=800mm, operating pressure are 86kPa, distance between plates is 500mm, the wide W of the downflow weir of chord downcomer
d=125mm, the long l in weir
w=581mm, arch area I, the II area occupied is 20% with the ratio of tower cross-sectional area.After adopting column plate of the present invention, still be the long l in single overflow weir
w' be 581mm, wide W
d' be 125mm, high h
wBe 25mm, hole diameter of sieve (perforated) plate d
o=10mm, the design that equidistantly is staggered of the square of center drilling, t '=2.6d are adopted in hole bunch
o, t
Cx=t
Cy=3.5d
oDistance between plates is adjusted into 350mm, and the number of plates is identical.The structural parameters of blending bin are H
B=100mm, L
B=W
B=50mm, H
P=h
w'=25mm, S
B=3S
H, θ
1=30 ° of θ
2=45 °.Measure to show that output of column of the present invention improves 40.2% than former tower, the purity of overhead benzene brings up to 99.97% by original 99.1%, and reflux ratio descends 20%, and the column plate average efficiency improves 28.2%.
Embodiment three: cyclohexanol-phenol rectifying.Former tower diameter D=1200mm, traditional aperture sieve plate d
o=Φ 4mm, single overflow type, tray spacing are H
T=300mm, the long l in the weir of chord downcomer
w=794mm, width W
d=150mm, height h
w=60mm.Downspout and overflow area area occupied are 14.44% of full tower cross-sectional area.After adopting tower plate structure of the present invention, still be the single overflow type, distance between plates and downflow weir are long all constant, the downflow zones area be tower section long-pending 5%.The column plate aperture changes d into
o=Φ 10mm, 5 hole clusters, t '=2.6d
o, the design that is staggered of the square unequal-interval of center drilling is adopted in hole bunch, as shown in Figure 5, and t
Cx=3.5d
o, t
Cy=3d
oThe structural parameters of blending bin are: H
B=110mm, L
B=W
B=50mm, H
P=40mm, S
B=2.5S
H, θ
1=40 °, θ
2=30 °.Measure demonstration, the disposal ability of tower shown in the present (flux) improves 49.3% than former tower, and tower base ring hexanol content reduces by 44.3% than former tower.Average plate efficiency brings up to 83% by original about 55%.Keeping under identical separation requires, flux has raising by a relatively large margin, and reflux ratio can be reduced to original 74%.
Claims (5)
1. plate separation tower column plate, column plate has downflow weir (4) and downspout (5), it is characterized in that having on the column plate a plurality of sieve apertures, screen-aperture is 3-20mm, sieve aperture is by bunch arrangement, 2-10 sieve aperture lined up one group of hole bunch regularly, above every group of hole bunch, be covered with the blending bin (1) of a no under casing shape, casing is fixed on the column plate with 2-4 tiny feet (2), mix the casing top seal, side at casing has venthole, the direction of venthole is consistent with liquid flow path direction on the column plate, and there is a deflector (3) that outwards stretches the top of venthole, and there is a deflector (3 ') that inwardly stretches the below of venthole, deflector (3,3 ') respectively becomes 10-80 ° angle (θ with the casing side
1, θ
2).
2. separating tower column plate according to claim 1, what it is characterized in that sieve aperture is arranged in the hole bunch is shaped as square, regular pentagon, regular hexagon, corresponding blending bin casing is tetragonal body, positive pentagonal prism body, hexagonal prism or cylinder, one group of hole bunch is preferably rearranged by 4-8 sieve aperture, bunch arrange with interlace mode or parallel mode in hole bunch and hole, and preferred arrangement mode is an alternating expression.
3. separating tower column plate according to claim 1 is characterized in that the θ angle that deflector (3) and casing side form, preferably 20-60 °.
4. separating tower column plate according to claim 1 is characterized in that downflow weir (4) is the crescent downflow weir.
5. separating tower column plate according to claim 1 is characterized in that the hanging downcomer of downspout (5) for pipe Caudad tower wall opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107059A CN1048414C (en) | 1997-07-31 | 1997-07-31 | Mixed box tower plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107059A CN1048414C (en) | 1997-07-31 | 1997-07-31 | Mixed box tower plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1181282A CN1181282A (en) | 1998-05-13 |
| CN1048414C true CN1048414C (en) | 2000-01-19 |
Family
ID=5169248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97107059A Expired - Fee Related CN1048414C (en) | 1997-07-31 | 1997-07-31 | Mixed box tower plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1048414C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417198B (en) * | 2008-10-10 | 2010-12-29 | 南京大学 | Solid mass-transferring ash-washing column plate |
| CN103252106B (en) * | 2013-05-30 | 2015-12-09 | 南京德邦金属装备工程股份有限公司 | Polygon flanging tilting recessed seal pan |
| CN103301645B (en) * | 2013-07-02 | 2015-09-02 | 袁小明 | A kind of High-flux plate-type tower |
| CN108310921A (en) * | 2018-03-29 | 2018-07-24 | 杭州众盛新科技有限公司 | Oval ripple sieve-plate tower |
| CN115253354B (en) * | 2022-07-25 | 2023-08-18 | 山东凯斯达机械制造有限公司 | Screen plate column plate unit assembly, stripping tower device and grain and oil deep processing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85201594U (en) * | 1985-04-01 | 1986-07-30 | 沈继香 | Screen hood shaped column tray |
| CN87205358U (en) * | 1987-11-18 | 1988-08-03 | 南京塔器制造厂 | Stain-resisting pattern contacting turret board composed with mutiple elements |
-
1997
- 1997-07-31 CN CN97107059A patent/CN1048414C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85201594U (en) * | 1985-04-01 | 1986-07-30 | 沈继香 | Screen hood shaped column tray |
| CN87205358U (en) * | 1987-11-18 | 1988-08-03 | 南京塔器制造厂 | Stain-resisting pattern contacting turret board composed with mutiple elements |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1181282A (en) | 1998-05-13 |
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