CN1214842C - Impact leakage preventing device of suspending downspout column plate - Google Patents
Impact leakage preventing device of suspending downspout column plate Download PDFInfo
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- CN1214842C CN1214842C CN 02147430 CN02147430A CN1214842C CN 1214842 C CN1214842 C CN 1214842C CN 02147430 CN02147430 CN 02147430 CN 02147430 A CN02147430 A CN 02147430A CN 1214842 C CN1214842 C CN 1214842C
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- column plate
- liquid
- inclined hole
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Abstract
The present invention relates to an impact liquid leakage preventing device of a suspending downspout column plate, which is arranged in the liquid accepting bubble region of a suspending downspout column plate and is provided with a plurality of rows of inclined holes through which gas passes. The whole impact liquid leakage preventing device of a suspending downspout column plate is composed of two parts of inclined holes, wherein the inclined direction of the inclined holes of one part is opposite to that of the inclined holes of the other parts, and both the parts have the same number of inclined holes; or the whole impact leakage preventing device of a suspending downspout column plate is composed of a plurality of rows of inclined holes, wherein the inclined direction of the inclined holes of each row is opposite to that of the inclined holes of the adjacent row, the inclined holes are positioned in staggered arrangement, and every adjacent two rows have the same number of inclined holes. The device can guide the impact leakage direction on guide column plates, so the amount of impact liquid leakage to the next layer of downspout column plates is reduced by over 80%, the contact of gas and liquid on column plates is improved, and the efficiency of column plates is enhanced by 5%-10%.
Description
Technical field
The present invention relates to a kind ofly to be widely used in refining oil, the hanging downcomer column plate anti-dumping unit in the various fractionating columns of industry, absorption tower, the desorbers such as chemical industry, petrochemical industry and light industry.
Background technology
In industries such as oil refining, chemical industry, petrochemical industry and light industry, use a large amount of towers come separating mixture to obtain highly purified product or remove gas and water in harmful substance with the protection environment.Along with the develop rapidly of oil and chemical industry, the energy is in short supply day by day, and equipment more maximizes and constantly expands and can increase production, and improves the disposal ability and the efficient of tower, and cutting down the consumption of energy becomes the development of current tower main flow.The technological progress of tower internals can produce very big economic benefit and social benefit.
Various big flux column plates (as MD column plate, DJ column plate, Nye column plate etc.) with hanging downcomer have been complied with the demand for development of tower raising disposal ability.This class column plate is suspended on gas-phase space to downspout, the downspout bottom is provided with base plate, have on the base plate bottom outlet flow to from the last layer column plate for liquid under one deck column plate, also offer the bubbling element on the liquid-receiving plate face under the downspout bottom outlet, the bubbling area of column plate is bigger than immersion downspout column plate.Particularly when many downspouts are set on the column plate,, improve the column plate disposal ability because also perforate bubbling on the liquid-receiving plate face of column plate can increase the bubbling area.But liquid drenches from the downspout bottom outlet that hangs and lowers, and the liquid layer that is subjected to the liquid bubbling area is had a downward impulsive force, can cause the impact leakage.Can produce an additional pressure head owing to drench the momentum that falls downward liquid flow, liquid speed is in 0.5m/s, and the additional pressure head of generation is about the 13mm fluid column.According to the correlation that calculates the dry-plate pressure drop of leakage point, when clear liquid layer height was 50～100mm, the dry-plate pressure drop of leakage point was about 12～19mm.This shows that the additional pressure head of hydraulic shock and the dry-plate pressure drop of leakage point are the same orders of magnitude, can not be ignored.In addition, for the hanging downcomer column plate, because downspout and the downspout of n+1 layer column plate of the n-1 layer column plate of the number position and the orientation of arranging on the plate face is identical from top to bottom, drop to the liquid of n layer column plate if form the impact leakage from the downspout of n-1 layer column plate at n layer column plate, not only can not on n layer column plate, carry out mass transfer with the gas phase that rises, and directly enter in the downspout of n+1 layer column plate, can not on n+1 layer column plate, carry out mass transfer with the gas phase that rises.This shows that the full tower liquid partial short circuit that the impact leakage of hanging downcomer causes influences mass-transfer efficiency.
US5453222 proposes to be subjected to the liquid bubbling area that a series of strip breather chamber are installed, the side perforate of breather chamber and not perforate of top makes gas hole from the side spray into liquid layer and carries out contact mass transfer.The liquid that comes out from the downspout bottom outlet drenches the top that drops to breather chamber, makes the top of breather chamber bear the momentum that liquid impacts downwards, reduces and impacts leakage, makes gas-liquid can be in the excellent contact state, improves mass-transfer efficiency.But this device will be welded in breather chamber on the column plate on the one hand, the structure more complicated, price is more expensive, on the other hand, because gas is much bigger by the resistance of other bubbling element on the column plate by the resistance ratios gas of breather chamber, can produce gas-liquid skewness on the plate face, influence gas-liquid and carry out contact mass transfer.US5702647, US4550000 and US4956127 also are being subjected to liquid bubbling area place that the vent hood of a series of side-wall holes is set, the not perforate of top of vent hood, gas comes out from areole, can decompose like this from the momentum of the defluent liquid of downspout bottom outlet, make liquid be not easy to be subjected to the liquid bubbling area to carry out contact mass transfer with liquid from following one deck column plate to the gas that rises from directly leaked by the liquid bubbling area downwards.These structures are more complicated also, easily causes to be subjected to liquid bubbling area gas-liquid skewness.US5277848 will be subjected to liquid bubbling area regional opening and upwards lift certain altitude, make the easy tapping from here of gas to rising, be subjected to that the plate of eliminating the liquid momentum is installed on the liquid bubbling area in some cases.This structure can be eliminated certain impact leakage in the design point operation, but when load variations off-design point, because liquid layer is crossed the angry body short circuit of small property, fluctuation of service.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, easy to process, cheap hanging downcomer column plate anti-dumping unit, this device overcomes the shortcoming of prior art, induce the direction of impacting leakage, make in its downspout that is not shorted to down one deck column plate and go, strengthen gas-liquid and be subjected to the mixing of liquid bubbling area, mass transfer, thereby improve plate efficiency.
Sieve aperture not only has the little advantage of other bubbling element of pressure drop ratio as the bubbling element, and has the advantage that is difficult for stifled, easy to process, cost saving, need not to overhaul, think that vast factory accepts.Some hanging downcomer column plates such as MD column plate and DJ column plate all adopt sieve aperture etc. as the bubbling element, but under the downspout bottom outlet be subjected to the liquid bubbling area with sieve aperture etc. as the bubbling element, can cause the impact leakage of liquid short circuit.But be subjected to adorn the bubbling element again on the liquid bubbling area, otherwise whole column plate bubbling area is reduced, reducing the disposal ability of column plate.The present invention is repacked the sieve aperture on the liquid bubbling area 3 that is subjected to of hanging downcomer column plate into protecting against shock leakage function inclined hole 6, and other bubbling area except that being subjected to liquid bubbling area 3 is opened sieve aperture or bubbling elements such as float valve or standing valve, the plan structure of hanging downcomer column plate anti-dumping unit 4 as shown in Figure 1, hanging downcomer column plate anti-dumping unit 4, it is characterized in that hanging downcomer column plate anti-dumping unit 4 is made up of the many rows inclined hole that is subjected to punching press on the liquid bubbling area 3 that is arranged on column plate 1, many row's inclined holes are formed (shown in Fig. 2 (a)) by the inclined hole 6 that adjacent two row's inclination directions are staggered on the contrary and adjacent two row's quantity equate, or form (shown in Fig. 2 (b)) by left and right sides two parts inclined hole 6 that the opposite quantity of inclination direction equates, many row's inclined hole aperture area areas be downspout bottom outlet 5 on column plate projected area 60%～120%, 80%～120% of the percent opening that many row's inclined hole aperture area percent openings be other bubbling area except that many rows inclined hole aperture area, other bubbling area of the column plate 1 except the hanging downcomer column plate anti-dumping unit 4 of arranging inclined holes offer can offer sieve aperture or float valve or standing valve etc. as the bubbling element more.Hanging downcomer column plate anti-dumping unit 4, row's number of arranging inclined hole is 2～30 more.The inclined hole 6 of forming hanging downcomer column plate anti-dumping unit 4 is rectangle inclined holes, or semicircle inclined hole.The length of rectangle inclined hole is 10～40mm, and wide is 5～20mm, and the radius of semicircle inclined hole is 5～20mm.
The present invention compared with the prior art, its advantage is:
1. the present invention is simple in structure, and is easy to process, and low cost can be made on column plate in direct punching press, and mechanical strength can be improved.
2. the present invention is because at the hanging downcomer column plate anti-dumping unit that be provided with by the liquid bubbling area to be made up of many rows inclined hole of hanging downcomer column plate, the air-flow that rises from below is not vertically upward by hanging downcomer column plate anti-dumping unit, but oblique many rows inclined hole by hanging downcomer column plate anti-dumping unit, below hanging downcomer column plate anti-dumping unit, form a gas hood, induce leakage to change direction, it or not the square downcomer that enters lower floor's column plate vertically downward, but the oblique bubbling area that enters lower floor's column plate, the feasible impact leaking liquid amount that enters the square downcomer of lower floor's column plate reduces more than 80%, has avoided the pernicious short circuit of liquid.
3. gas tiltedly blows into liquid layer from many rows inclined hole of hanging downcomer column plate anti-dumping unit and has also strengthened vapour-liquid at the mixing that is subjected to the liquid bubbling area, mass transfer, improves plate efficiency 5%～10%.
Description of drawings
Fig. 1 is the plan structure schematic diagram of hanging downcomer column plate anti-dumping unit.
Fig. 2 (a) is the hanging downcomer column plate anti-dumping unit plan structure schematic diagram that adjacent two row's inclination directions are staggered on the contrary and the equal inclined hole of adjacent two row's quantity is formed, and Fig. 2 (b) is the hanging downcomer column plate anti-dumping unit plan structure schematic diagram that the equal left and right sides two parts inclined hole of the opposite quantity of inclination direction is formed.
Fig. 3 is subjected to the liquid bubbling area that the gas-liquid contact condition figure of the hanging downcomer column plate of sieve aperture is set.
Fig. 4 is subjected to the liquid bubbling area that the gas-liquid contact condition figure of the hanging downcomer column plate of hanging downcomer column plate anti-dumping unit is set.
Fig. 5 is the impact leaking liquid amount comparison diagram that is subjected to the liquid bubbling area that hanging downcomer column plate anti-dumping unit is set and the hanging downcomer column plate of sieve aperture is set.
Fig. 6 is the full column efficiency comparison diagram that is subjected to the liquid bubbling area that hanging downcomer column plate anti-dumping unit is set and the hanging downcomer column plate of sieve aperture is set.
1-column plate wherein, the 2-square downcomer, 3-is subjected to the liquid bubbling area, 4-hanging downcomer column plate anti-dumping unit, 5-downspout bottom outlet, 6-inclined hole, 7-sieve aperture, 8-air-flow, 9-leakage, 10-downspout bottom outlet liquid stream.
The specific embodiment
Embodiment: the present invention is further illustrated below in conjunction with accompanying drawing.
Hanging downcomer column plate anti-dumping unit 4, it is characterized in that hanging downcomer column plate anti-dumping unit 4 is made up of the many rows inclined hole that is subjected to punching press on the liquid bubbling area 3 that is arranged on column plate 1, many row's inclined holes are formed (shown in Fig. 2 (a)) by the inclined hole 6 that adjacent two row's inclination directions are staggered on the contrary and adjacent two row's quantity equate, or form (shown in Fig. 2 (b)) by left and right sides two parts inclined hole 6 that the opposite quantity of inclination direction equates, many row's inclined hole aperture area areas be downspout bottom outlet 5 on column plate 1 projected area 60%～120%, 80%～120% of the percent opening that many row's inclined hole aperture area percent openings be other bubbling area except that many rows inclined hole aperture area, other bubbling area of the column plate 1 except the hanging downcomer column plate anti-dumping unit 4 of arranging inclined holes offer offer sieve aperture or float valve or standing valve etc. as the bubbling element more.Row's number of many row's inclined holes is 2～30.The inclined hole 6 of forming hanging downcomer column plate anti-dumping unit 4 is rectangle inclined holes, or semicircle inclined hole.The length of rectangle inclined hole is 10～40mm, and wide is 5～20mm, and the radius of semicircle inclined hole is 5～20mm.Fig. 3 is subjected to liquid bubbling area 3 that the gas-liquid contact condition figure of the hanging downcomer column plate of sieve aperture 7 is set.As seen from Figure 3, liquid 10 from the downspout bottom outlet 5 of upper strata column plate 1 with certain speed drop to have a sieve aperture 7 be subjected to liquid bubbling area 3, to being subjected to the liquid layer on the liquid bubbling area 3 that one downward impact power is arranged, the partially liq that is subjected on the liquid bubbling area 3 can be drained to down in the square downcomer 2 of one deck column plate 1 by sieve aperture 7 to be gone, become the leakage 9 of the square downcomer 2 that enters down one deck column plate 1, the leakage 9 that enters down the square downcomer 2 of one deck column plate 1 can not be carried out contact mass transfer with the gas 8 on from descending, and has a strong impact on the mass-transfer efficiency of column plate.Fig. 4 is subjected to liquid bubbling area 3 that the gas-liquid contact condition figure of the hanging downcomer column plate of hanging downcomer column plate anti-dumping unit 4 is set.As seen from Figure 4: after being subjected to liquid bubbling area 3 to adorn hanging downcomer column plate anti-dumping unit 4 under the square downcomer 2 of hanging downcomer column plate 1, the gas 8 that rises from below is not the inclined hole 6 that passes through hanging downcomer column plate anti-dumping unit 4 vertically upward, but oblique inclined hole 6 by hanging downcomer column plate anti-dumping unit 4, below hanging downcomer column plate anti-dumping unit 4, form a gas hood, induce leakage 9 to change direction, it or not the square downcomer 2 that enters lower floor's column plate 1 vertically downward, but the oblique bubbling area that enters lower floor's column plate with from down and on gas 8 carry out contact mass transfer, significantly reduce the leaking liquid amount of the square downcomer 2 that enters lower floor's column plate 1, improved the column plate mass-transfer efficiency.Fig. 5 shows the hanging downcomer column plate short circuit that is subjected to liquid bubbling area 3 that hanging downcomer column plate anti-dumping unit 4 is set and sieve aperture 7 is set and enters down the leaking liquid amount comparison diagram of the square downcomer 2 of one deck column plate 1.Experiment is carried out in a diameter is the lucite tower of 500mm, serves as the experiment system with air-water, and having tested sprinkle density is 51m
3/ m
2Be subjected to liquid bubbling area 3 that hanging downcomer column plate anti-dumping unit 4 is set during h and enter down the leaking liquid amount of the square downcomer 2 of one deck column plate 1 with the hanging downcomer column plate short circuit that sieve aperture 7 is set.As seen from Figure 5, reduced more than 80% than the leaking liquid amount that is subjected to liquid bubbling area 3 and is provided with sieve aperture 7 and drain to the square downcomer 2 of time one deck column plate 1 being subjected to liquid bubbling area 3 that leaking liquid amount that hanging downcomer column plate anti-dumping unit 4 of the present invention drains to the following square downcomer 2 of one deck column plate 1 is set.Because being subjected to of hanging downcomer column plate is provided with hanging downcomer column plate anti-dumping unit 4 of the present invention on the liquid bubbling area 3, gas 8 on from descending tiltedly blows into the liquid layer that is subjected on the liquid bubbling area 3 from inclined hole 6, has also strengthened vapour-liquid and has been subjected to mixing, mass transfer on the liquid bubbling area 3.Therefore, being subjected to of hanging downcomer column plate is provided with hanging downcomer column plate anti-dumping unit 4 on the liquid bubbling area 3 after, reduce the leaking liquid amount of the square downcomer 2 that enters down one deck column plate 1 and strengthened being subjected to vapour-liquid contact mass transfer on the liquid bubbling area 3, can improve plate efficiency.Fig. 6 shows in a diameter is the stainless head tower of 300mm, with the alcohol-water is system, under the situation of total reflux operation, the full column efficiency comparison diagram that is subjected to that hanging downcomer column plate anti-dumping unit 4 is set on the liquid bubbling area 3 and the hanging downcomer column plate of sieve aperture 7 is set.As seen from Figure 6, the full column efficiency of hanging downcomer column plate that is subjected to be provided with on the liquid bubbling area 3 hanging downcomer column plate anti-dumping unit 4 has been owing to reduced the impact leaking liquid amount of the square downcomer 2 that enters down one deck column plate 1 and strengthened and be subjected to vapour-liquid contact mass transfer on the liquid bubbling area 3, and is higher by 5%～10% than being subjected to liquid bubbling area 3 that the full column efficiency of hanging downcomer column plate of sieve aperture 7 is set.
Claims (4)
1. a hanging downcomer column plate anti-dumping unit (4), it is characterized in that hanging downcomer column plate anti-dumping unit (4) is made up of the many rows inclined hole that is subjected to liquid bubbling area (3) to go up punching press that is arranged on column plate (1), many row's inclined holes are made up of the inclined hole (6) that adjacent two row's inclination directions are staggered on the contrary and adjacent two row's quantity equate, or form by left and right sides two parts inclined hole (6) that the opposite quantity of inclination direction equates, many row's inclined hole aperture area areas be downspout bottom outlet (5) on column plate projected area 60%～120%, arrange inclined hole aperture area percent opening more and be other bubbling area except that many rows inclined hole aperture area percent opening 80%～120%.
2. hanging downcomer column plate anti-dumping unit according to claim 1 (4) is characterized in that row's number of many row's inclined holes is 2～30.
3. hanging downcomer column plate anti-dumping unit according to claim 1 (4) is characterized in that above-mentioned inclined hole (6) is the rectangle inclined hole, or semicircle inclined hole.
4. hanging downcomer column plate anti-dumping unit according to claim 3 (4), the length that it is characterized in that the rectangle inclined hole is 10～40mm, and wide is 5～20mm, and the radius of semicircle inclined hole is 5～20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02147430 CN1214842C (en) | 2002-10-24 | 2002-10-24 | Impact leakage preventing device of suspending downspout column plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02147430 CN1214842C (en) | 2002-10-24 | 2002-10-24 | Impact leakage preventing device of suspending downspout column plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1491734A CN1491734A (en) | 2004-04-28 |
| CN1214842C true CN1214842C (en) | 2005-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02147430 Expired - Fee Related CN1214842C (en) | 2002-10-24 | 2002-10-24 | Impact leakage preventing device of suspending downspout column plate |
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| Country | Link |
|---|---|
| CN (1) | CN1214842C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103816692B (en) * | 2014-03-11 | 2016-01-20 | 济钢集团国际工程技术有限公司 | Inclined hole tower tray is used in a kind of distillation |
| CN111135598B (en) * | 2020-01-11 | 2021-06-15 | 无锡市华诚石化设备有限责任公司 | Liquid descending buffer device of multi-downcomer tower tray |
| CN111298473A (en) * | 2020-03-20 | 2020-06-19 | 浙江工业大学 | Anti-impact liquid leakage device for tower plate |
| CN113351151A (en) * | 2021-06-08 | 2021-09-07 | 武汉凯通石化机械有限公司 | Design method of suspension type eccentric downcomer floating valve tray |
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2002
- 2002-10-24 CN CN 02147430 patent/CN1214842C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1491734A (en) | 2004-04-28 |
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Granted publication date: 20050817 Termination date: 20161024 |
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| CF01 | Termination of patent right due to non-payment of annual fee |