CN1142001C - Tower plate for gas-liquid mass transfer - Google Patents
Tower plate for gas-liquid mass transfer Download PDFInfo
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- CN1142001C CN1142001C CNB001052756A CN00105275A CN1142001C CN 1142001 C CN1142001 C CN 1142001C CN B001052756 A CNB001052756 A CN B001052756A CN 00105275 A CN00105275 A CN 00105275A CN 1142001 C CN1142001 C CN 1142001C
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- plate
- mass transfer
- column plate
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- column
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- 238000012546 transfer Methods 0.000 title claims abstract description 57
- 239000007788 liquid Substances 0.000 title claims abstract description 26
- 230000000694 effects Effects 0.000 claims description 8
- 238000007667 floating Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 7
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 241000282326 Felis catus Species 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 230000001131 transforming effect Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 210000002105 tongue Anatomy 0.000 description 2
- 241000237509 Patinopecten sp. Species 0.000 description 1
- 241000736911 Turritella communis Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000011234 economic evaluation Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000020637 scallop Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The present invention discloses a tower plate for gas-liquid mass transfer in the oil refining and petrochemical industry production. After one layer of additional mass transfer component is set on a conventional tower plate of the present invention, a double-layer tower plate is formed; the upper space of the tower plate is sufficiently utilized, large phase contact area and long stay time are provided for gas-liquid two phases. Simultaneously, the back mixing of the liquid on the tower plate is reduced, and the efficiency of the tower plate is obviously increased. In order to obtain favorable effects, a diversion component is set in an inlet area of liquid, and a drainage hole is set on the lower part of an outlet weir to improve the flowing and distribution state of gas and liquid and prompt the contact of the two phases. Compared with the single-plate efficiency of the conventional tower plate, the single-plate efficiency of the tower plate of the present invention can be increased for 20 to 40%.
Description
Technical field
The present invention relates to refine oil and a kind of column plate that be used for gas-liquid mass transfer of petrochemical industry in producing, be used for towers such as fractionating column, absorption tower.
Background technology
Plate column is a kind of gas-liquid mass transfer (contact) equipment of extensive use during petrochemical industry is produced.Form according to mass transfer elements on the column plate can be divided into bubble column, sieve-plate tower, valve tower and inclined holes tower etc.Hydrodynamics state and mass-transfer performance when the structure of column plate has determined their operations to a certain extent.The performance of estimating column plate has the following aspects: the production capacity of (1) column plate; (2) mass-transfer efficiency of column plate; (3) operating flexibility; (4) pressure drop of column plate; (5) complex structure degree and cost etc.In application, often select suitable version for use according to the performance of process characteristic and column plate.
Energy-saving and cost-reducing, the elimination " bottleneck " of the demand for development that petrochemical industry is produced is had higher requirement to the plate column internals, has done a large amount of work round improving disposal ability and aspects such as mass-transfer efficiency, expansion operating flexibility.At present domestic except that continuing traditional column plates such as employing F1 type Round float valve, sieve plate, also had some novel column plates to obtain applying quite widely in nearly ten years, as rectangular valve, ship shape float valve, guide float-valve, JF float valve etc.
A lot of about the patent of novel column plate both at home and abroad.What U.S. Pat 5762834 was invented is a kind of trapezoidal float valve, on the column plate of each valve correspondence, have a circular port as gas channel, the area in hole is wanted and can be covered by the valve plate of float valve fully, position in two end correspondences of trapezoidal valve plate has a finedraw, and two valve legs are installed in the finedraw.US 5788894 is disclosed to be a kind of high load capacity column plate, and its discrete component is similar to the VIGRID column plate, and difference is that spread pattern becomes in-line arrangement and is the mixing of T shape, and has added the part pod apertures; The mass transfer component of US 5360583 inventions is similar to the VIGRID tower plate structure, adopts the form that staggers fully on arranging; US 5120474 is disclosed to be a kind of circular float valve, and the valve plate face is smooth, two valve leg symmetries on the valve, and the diameter of valve is less than the F1 float valve of routine.What Chinese patent ZL 96229716.X (Granted publication CN 2258088Y) invented is the structure of rectangle guide float-valve and trapezoidal guide float-valve mixing.What ZL 93244365.6 (Granted publication CN 2186593Y) disclosed is a kind of perforation type column plate with adjustable downspout.ZL 97249621.1 (Granted publication CN 2310609Y) discloses a kind of band wing float valve, and the main body of valve is the ship shape structure, with the difference of ship valve be that the both sides of valve have zigzag seam, also have pod apertures on the valve leg.
Above-mentioned various column plates be applied in some deficiency that has overcome traditional column plate to a certain extent, obtained remarkable economic efficiency.But existing problem is, these column plates are abundant inadequately in space utilization, and the mass-transfer efficiency of many column plates is all below 60%.
Summary of the invention
The object of the present invention is to provide a kind of column plate, can make full use of space in the tower,, improve plate efficiency, thereby solve the existing not high problem of all kinds of column plate mass-transfer efficiency for gas-liquid two-phase provides bigger contact area.
For achieving the above object, the technical solution used in the present invention is: a kind of column plate that is used for gas-liquid mass transfer, on column plate, be provided with exit weir, downspout, and it is characterized in that: the top of column plate is provided with additional mass transfer parts.
Adopt column plate of the present invention, have following beneficial effect: the present invention has increased the additional mass transfer parts of one deck on column plate, utilized the space of column plate top fully, has increased the contact area of gas, liquid two-phase, has prolonged two-phase time of contact.The existence of additional mass transfer parts also helps the back-mixing (liquid is along the back-mixing on the column plate flow direction with along the axial back-mixing of tower) that reduces liquid, increases the alternate mass transfer force of gas-liquid.Therefore, the present invention can significantly improve the mass-transfer efficiency of column plate.
For further improving the mass-transfer efficiency of column plate of the present invention, can diversion component be set in column plate liquid-inlet district, below exit weir, offer conduction hole, to improve flowing and distribution of gas-liquid, promote two alternate contacts.
Comprehensively take the measure of above several aspects, can make the more existing all kinds of conventional column plates of mass-transfer efficiency of every layer of column plate of the present invention improve 20～40%, and by improving the disposal ability that mass-transfer efficiency enlarges column plate to a certain extent.In addition, additional mass transfer parts can not produce excessive resistance to flowing of gas-liquid two-phase, thus pressure fall can not increase too many.
For sieve plate, inclined hole and float valve class column plate, the spatial altitude that its mass transfer component occupies on column plate is less; The additional mass transfer parts of one deck are set above it, can become the contact mode of the contact mode of individual layer column plate, become lamina efficient and be doubling plate efficient, so just improved the mass transfer effect of column plate into double-deck column plate.The improvement of mass-transfer efficiency also will bring wholesome effect to other performance of column plate.After for example the column plate mass-transfer efficiency improves, can be issued to same separating effect in lower reflux ratio to rectifying column; This had both helped saving energy and reduce the cost, and helped improving the disposal ability of tower again.For the absorption tower, then can reach same assimilation effect with lower ratio of solvent; This will reduce the power consumption of carrying absorbent, simultaneously the absorption tower can be operated under bigger treating capacity.
The present invention is further detailed explanation below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is that column plate of the present invention is along the axial cutaway view of tower.
Fig. 2 is the C-C view of Fig. 1.
Fig. 3 is that the B of Fig. 1 is to view (amplification).
Fig. 4～Figure 13 is the A-A cutaway view of Fig. 1, shows the section configuration of the additional mass transfer parts of various structures.Wherein:
Figure 4 shows that the additional mass transfer parts of planar shaped, its both sides are fixed on the column plate of bottom.
Fig. 5 is for having increased the additional mass transfer parts of dividing plate on structure shown in Figure 4; Dividing plate can perforate, also can not perforate.
Figure 6 shows that zigzag additional mass transfer parts.
Figure 7 shows that corrugated additional mass transfer parts.
Figure 8 shows that the additional mass transfer parts of the rectangle that is divided into a plurality of unit.
Figure 9 shows that the corrugated additional mass transfer parts that are divided into a plurality of unit.
Figure 10 shows that the additional mass transfer parts of the semicircle that is divided into a plurality of unit.
Figure 11 shows that the additional mass transfer parts of the inverted v-shaped that is divided into a plurality of unit.
Figure 12 shows that the additional mass transfer parts of the half elliptic that is divided into a plurality of unit.
Figure 13 shows that the trapezoidal additional mass transfer parts that are divided into a plurality of unit.
The specific embodiment
As shown in Figure 1 and Figure 2, column plate 1 is installed on the tray supporting 6, and tray supporting 6 is fixed in tower shell 4.Column plate 1 is provided with exit weir 7 and downspout 5, and exit weir 7 is installed on the tube sheet of downspout 5.Column plate 1 can be existing sieve plate, float valve, inclined hole class column plate commonly used.Additional mass transfer parts 3 are fixed in the top of column plate 1.
Additional mass transfer parts 3 shown in the figure can be selected sieve plate for use, and have the multiple section configuration perforated panel of (as Fig. 4～shown in Figure 13), web plate or silk screen establishment plate etc.Wherein, the perforate on the different shape perforated panel can be circular hole, square hole, diamond hole, slotted eye etc.In addition, several structures that are divided into a plurality of unit for shown in Fig. 8～Figure 13 can also make up, and form the additional mass transfer parts of multiple-unit combination shape.For example, trapezoidal combination among the rectangle among Fig. 8 and Figure 13, the combination of inverted v-shaped among the semicircle among Figure 10 and Figure 11, half elliptic combination among the corrugated and Figure 12 among Fig. 9, or the like.In a word, can in Fig. 8～Figure 13, be divided in the structure of a plurality of unit and carry out two kinds even multiple combination.
Being provided with of additional mass transfer parts 3 needs to satisfy following the requirement: (1) according to the height of size design parts on column plate of liquid load, guarantee parts at least under high load capacity by the submergence of liquid institute, to play effect of mass transmitting; (2) percent opening or porosity are higher than the column plate 1 of its underpart, the load-bearing capacity of reduction column plate in order to avoid parts are excessive to the resistance of air-flow; (3) additional mass transfer parts 3 can not produce excessive resistance to liquid; Such as being corrugated additional mass transfer parts 3 to section, ripple should suitably open wide on the direction of liquid flow, and promptly the ripple spacing can not be too little; (4) the parts design should take into full account the impact that the biphase gas and liquid flow movable property is given birth to, and guarantees that it has enough intensity.
Additional mass transfer parts of the present invention, its material can be selected metal, pottery or plastics etc.
For preventing the gas bias current, the liquid-inlet district on column plate 1 is provided with diversion component 2.Diversion component 2 is set reduces back-mixing, improve fluid distribution, promote that two contact, help to improve the mass-transfer efficiency of column plate.Fig. 1, diversion component 2 shown in Figure 2 are the solid tongues of two rows.Diversion component 2 can also be floating tongue, pod apertures or the float valve with guide effect etc.
Among Fig. 1, have conduction hole 8 below exit weir 7, conduction hole 8 is a gang saw scallop, as shown in Figure 3.Below exit weir 7, offer conduction hole and can reduce the delay of nearly column plate layer liquid, thereby make the liquid on the column plate that the more uniform time of staying be arranged, help improving mass-transfer efficiency.As required, conduction hole 8 can also adopt other shape, as semicircle, half elliptic etc.
Be that example describes in detail the present invention with the single current column plate in conjunction with the accompanying drawings below.Double fluid and the multipaths column plate can the rest may be inferred.
Illustrate an actual operating position of the present invention below.
Certain oil plant 10 * 10
4Ton/year gas fractionation unit propylene fractionating column A, the original production scheme is: cat head is produced 95% crude propylene, produces 85% propane at the bottom of the tower.Full tower totally 120 layers of single current F1 valve plate, 2000 millimeters of tower diameter φ, 450 millimeters of distances between plates, percent opening is 11.4%, the downspout area be tower section long-pending 10.4%.The back is because of the products scheme adjustment, and cat head requires to produce fine propylene (purity 〉=99.5%).For satisfying production requirement, need transform tower, improve the mass-transfer efficiency of full tower.Have two sets of plan to realize this goal:
(1) increases the number of plates.Be that original 120 layers of single current column plate reservation is motionless, other builds a same tower diameter, and tower height is 34 meters tower B, and 60 layers of F1 type single current valve plate are set in this tower, 450 millimeters of distances between plates, and percent opening and downspout face integration rate are respectively 11.4% and 10.4%.A, B two tower serial operations.Estimate that investment for trnasforming urban land is 1,000,000 yuan.
(2) original tower and column plate keep motionless, on every layer of column plate 40 millimeters locate that additional one deck percent opening is 25%, the aperture is 3 millimeters sieve tray.Investment for trnasforming urban land is 150,000 yuan.
For reducing investment outlay, reduce the workload of floor space and transformation, scheme (2) is adopted in final decision.The scheme implementation process has only been used 20 days.Carried out after the operation producing and demarcated, product quality is up to standard fully.Under reflux ratio is 14 situation (reflux ratio need 14.5 before transforming), cat head fine propylene content reaches 99.65%, and propane reaches 91.2% at the bottom of the tower.Propene yield increases substantially (yield amplification surpasses 3.8%), remarkable in economical benefits.
By this example as can be seen, the use of additional mass transfer parts has made full use of the space on the column plate, has greatly improved the efficient (veneer efficient is average 80.5% before transforming, and improved veneer efficient reaches 120.7%) of column plate, has reduced investment for trnasforming urban land significantly.Do not have in operating cost under the situation of obvious increase, make product qualitatively a grade, and increased the rate of recovery of propylene.The economic evaluation of transforming is shown that annual productivity effect can increase by 4,570,000 yuan.As seen, the double-deck column plate that adds the mass transfer parts is set good market prospects are arranged.
Claims (4)
1, a kind of column plate that is used for gas-liquid mass transfer, on column plate (1), be provided with exit weir (7), downspout (5), the top of column plate (1) is provided with additional mass transfer parts (3), it is characterized in that: described column plate (1) is sieve plate, valve plate or slant-hole tray, described additional mass transfer parts (3) are sieve plate, perforated panel, web plate or silk screen establishment plate, the height of additional mass transfer parts (3) should make additional mass transfer parts (3) at least under high load capacity by the liquid institute submergence on the column plate (1), the percent opening of additional mass transfer parts (3) or the column plate (1) that porosity is higher than its underpart.
2, column plate according to claim 1 is characterized in that: the liquid-inlet district of column plate (1) is provided with diversion component (2).
3, column plate according to claim 2 is characterized in that: diversion component (2) is pod apertures, solid tongue, floating tongue or the float valve with guide effect.
4, according to claim 1 or 2 or 3 described column plates, it is characterized in that: the below of exit weir (7) is provided with conduction hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001052756A CN1142001C (en) | 2000-04-04 | 2000-04-04 | Tower plate for gas-liquid mass transfer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001052756A CN1142001C (en) | 2000-04-04 | 2000-04-04 | Tower plate for gas-liquid mass transfer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1298751A CN1298751A (en) | 2001-06-13 |
| CN1142001C true CN1142001C (en) | 2004-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001052756A Expired - Fee Related CN1142001C (en) | 2000-04-04 | 2000-04-04 | Tower plate for gas-liquid mass transfer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1142001C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101480537B (en) * | 2008-01-11 | 2013-05-15 | 山东科技大学 | Novel turbogrid type composite column plate |
| CN105457418B (en) * | 2015-12-28 | 2018-05-25 | 青岛科技大学 | Combined type washs rectifying column |
| CN105413222A (en) * | 2015-12-29 | 2016-03-23 | 天津市创举科技有限公司 | Dual layer equal effect tower plate |
| CN109200614B (en) * | 2018-10-23 | 2020-10-23 | 常州大学 | Design method of tower plate structure for eliminating gas phase bias flow |
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2000
- 2000-04-04 CN CNB001052756A patent/CN1142001C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1298751A (en) | 2001-06-13 |
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Address after: 100029 Beijing City, Chaoyang District Hui Street No. 6 Patentee after: China Petrochemical Group Corp. Patentee after: Luoyang Petrochemical Engineering Corporation /SINOPEC Address before: 100029 Beijing City, Chaoyang District Hui Street No. 6 Patentee before: China Petrochemical Group Corp. Patentee before: Luoyang Petrochemical Engineering Co., China Petrochemical Group |
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| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: SINOPEC LUOYANG PETROCHEMICAL ENGINEERING CORPORATION Effective date: 20130326 Owner name: SINOPEC LUOYANG PETROCHEMICAL ENGINEERING CORPORAT Free format text: FORMER OWNER: SINOPEC GROUP Effective date: 20130326 |
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Free format text: CORRECT: ADDRESS; FROM: 100029 CHAOYANG, BEIJING TO: 471003 LUOYANG, HENAN PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130326 Address after: 471003 Zhongzhou West Road, Henan, China, No. 27, No. Patentee after: Luoyang Petrochemical Engineering Corporation /SINOPEC Address before: 100029 Beijing City, Chaoyang District Hui Street No. 6 Patentee before: China Petrochemical Group Corp. Patentee before: Luoyang Petrochemical Engineering Corporation /SINOPEC |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040317 Termination date: 20160404 |
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| CF01 | Termination of patent right due to non-payment of annual fee |