CA1114310A - Degassing column - Google Patents
Degassing columnInfo
- Publication number
- CA1114310A CA1114310A CA370,134A CA370134A CA1114310A CA 1114310 A CA1114310 A CA 1114310A CA 370134 A CA370134 A CA 370134A CA 1114310 A CA1114310 A CA 1114310A
- Authority
- CA
- Canada
- Prior art keywords
- column
- plates
- lower portion
- capping
- conduit
- 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.)
- Expired
Links
Abstract
DEGASSING COLUMN
ABSTRACT OF THE DISCLOSURE:
A degassing column comprising a tubular shell pro-vided with a plurality of apertured plates; the plates are vertically spaced within said shell; a gap uniform in width over the periphery is left between each plate and said shell; each of said plates is penetrated by at least one eccentrically arranged conduit comprising a draining shaft in the upper portion thereof and a feed shaft in the lower portion below the penetrated plate;
the apertures in said plates have a diameter of less than 5 mm; and a surface portion of each plate underneath each conduit is impermeable, said impermeable surface portion being one to two times the cross-section of said conduit.
More specifically, a capping sleeve is slipped over each draining shaft. The capping sleeve comprises an upper portion whose cross-section is similar to that of the draining shaft, and a lower portion of larger cross-section, which lower portion overlaps and is securely connected to the upper portion.
ABSTRACT OF THE DISCLOSURE:
A degassing column comprising a tubular shell pro-vided with a plurality of apertured plates; the plates are vertically spaced within said shell; a gap uniform in width over the periphery is left between each plate and said shell; each of said plates is penetrated by at least one eccentrically arranged conduit comprising a draining shaft in the upper portion thereof and a feed shaft in the lower portion below the penetrated plate;
the apertures in said plates have a diameter of less than 5 mm; and a surface portion of each plate underneath each conduit is impermeable, said impermeable surface portion being one to two times the cross-section of said conduit.
More specifically, a capping sleeve is slipped over each draining shaft. The capping sleeve comprises an upper portion whose cross-section is similar to that of the draining shaft, and a lower portion of larger cross-section, which lower portion overlaps and is securely connected to the upper portion.
Description
3~
HOE '77/H 017K
This invention relates to a degassing column for re~
moving monomers present in a polymer dispersion compris- :
ing a tubular shell provlded with a plurality of apertllred plates, said plates being vertically spaced wlthin said shell, a small gap uni~orm in width over the periphery being left between each of said plates ~nd sald shell~
each of said pla-tes being penetrated by at le~t one eccentrically arranged condui-t comprising a draining shaft in the upper portion thereof and a feed sha~t in the lower portion below the penetrated plate, the aper-tures in said plates having a diameter of less th~n 5 mm, and a surface portion of each plate underneath each oon-duit being impermeable, said impermeable sur~ace portionbeing one to two times the cross-section of said conduit.
In view of the great variety o~ liquid materlals, including in partlcular polymer di~persions, which may ~:
have to be freed from gas or vapour; e. g. vapours of monomers, ln a d~gassing column, and in view of the de-sirabllity o~ an improved degasifying effect~ it would be highly des~rable to have a de~a~sing column wherein the distance between the upper end o~ each draining shaft and the respective plate, i. e. the weir height, could be varied.
It is therefore and object of the present inven-tion to provide a degassing column of the type described in which column the weir height of the plates can be modi~ied ln a simple and inexpensive manner according to the par-ticular polymer dispersion which is to be treated ~nd the degree of degasi~ication which is aimed at. .
3~
~, According -to the presen~t inventlon3 we pro~ide a de~assi.ng column compri~ing a tubular ~hell provided wit,h a pl.ural.i-ty of ~pertured pl.ates; said pla-te~ being vertically ~paced withln said shell; a small gap uniform in Wi~t}l o~er the pe.riphery being left b~tween each of said plates and said shell; each of ~ald pla-tes being pe~etrated by at least one eccèntrically arran~ed con-dult comprising a drainislg shaft in ~the upper pf~rtion thereof and a feed shaft in the lower por-tion below ~he penetrated plate; the apertllres ln said pl~tes having a diameter of less than 5 mm; and a surface portion of each plate undernea-th each conduit ~Lng impermeable, s~id im permeable surface portion being one to two times the cross-seotion of said conduit; ln which degass:Lng col.u~n a capp~
ing sleeve is slipped over each drainin~ sha~-t, -the capping sleeves each compri~ing an upper portion whose cro~s-section is similar to that of -the draining shaft, and a lower por-tlon of larger cross section~ which lowe~ portion overlaps and is securely connected to the upper p~r-tion.
.0 Pre~erred features of the present invention provide-a) for each of the capping sleeves to be ~ormed in its lower por-tion with a plurality of slits distributed around its periphery, in which slits there are engaged respectlve bolts secured in a radial orientation to the draining shaft;
b) for the slits each to compr.ise a lower portion wh~ch extends in the axial direction of the capping sleeve and an upper portio~ which extends tran~ver~ely with re~pect thereto;
' : ;
3.a~ :
c) for the capping sleeves each to have three of the ~a:i.d sllts;
d) for the said bolts to be screw-th.readed, arld e) for -the capping sleeves to he held in position by means of` nuts screw-threadedly engaged on the said bolts.
In a degassing column according to -the present ln--vent.lon) i-t ls possible to provide the plates with per~
~orations spaced apart at interval.s of 15 mm, for example, : 10 so that ~olid matter is not llable to deposit evell if the wid-th over which the rings are supporting the plates is up to 20 mm. Solid matter is al~o not liable to d0po~it on the column wall inasmuch as we do no-t contemplate that the lat-ter should be very effectively heat-insulated, so that a condensate~ e. g~ wate~ if steam is pr~sent within , the colum~l, can contimlally form on the inside of the ; column shell and can run down ~n the ~orm of a liquid film producing a washing e~fect.
The impermeable sur~ace on eac,h plate below the re-spective shaft has an area which is pre.~erably 1 to 2 -times the cross-sectional area of the shaf-t.
In a typical construction in accordance with -the i~lvention, the distance ~etween -the upper end of each conduit and the respective plate is 80 to 400 rn.m, and 25 the lower end of each conduit terml.nates 10 to 100 mm above the pla-te below it.
Cer-tain embodlmen*s of the present invention are shown dlagrammatîcally in the accompanylng~ drawings, in w~ich:
;~ ~ 4 _ ~: .
3~
Figure 1a is a sectional side elevation view of the degassing column;
Figure 2a is a sectional side elevational ~lew of a draining shaft ha~ing a ~ap rnountlng slipped over it;
Figure 3a is a side view of a drainillg sha~t having a cap mounting slipped over it; and Figure 4a is a plan view of the draining sha~t of Figure 3a.
As can be seen in Figure la, a series of perforated plates 2a which are vertically space apar-t is arranged in a column shell 1a, a gap 3a uniform in wid-th around the periphery being left between each plate 2a and the column shell 1a. The plates 2a are penetrated by a plu-rality of stay bolts 4a, the portion of each stay bolt 4a extending between two ad~acent pla-tes 2a being con-centrically surrounded by a slee~e 5a, which ~upports an upper plate 2a, and which suppor-ts itself wi-th ~t~
lower end on a lower plate 2a. ~n eccentrically arranged conduit serves to provide a feed sha~t 7a which ter~inates above each plate 2a; also each plate 2a is penetrated by an eccentrically arranged conduit which serves to pro-vide a draining shaft 6a. Positioned below each feed shaft 7a, on the respective plate 2a, is a covering sheet 8. Slipped over each draining sha~t 6a i~ a capp-ing sleeve 9a, which enables the we~ height, i, e. the distance between the upper end o~ the drainin~ sha~t 6a (extended by means o~ -the capping slee~e 9 ) and the plate 2a, to be readily varied, in accordance with the length of the capping slee~e 9a which i~ selected. The , . .
. .
3~
capping sleeve 9a comprises an upper portion lOa (Figures 2a and 3a) of which the cross~sec-tion is similar to tha-t of the dra:ining shaft 6a, and a lower portion l1a o~ larger cross-section, which overlaps the upper portion 10a and i.s securely connected -there-t,o. The lower por-tion 11a of the capping sleeve 9a is formed wi-th a plurality of slits 12a (Figure 3a) which are d.istributed around it~ periphery at uniform angular intervals. The slits 12a have a lower portion which extends in the axial direction of the capping sleeve 9a and an upper portion which ex-tends transversely with respectthereto, thus giving a bayone~ connection of the capping sleeve 9a to the shaft 6a, Dis-tributed uniformly around the periphery o~ the draining shaft 6a and fastende radially there-to is a plurality of threaded bolts 13a (Figure 4a). The capping sleeve 9a is a-ttached by so presenting it to the shaft 6a tha-t the bolts 13a enter the slits 12a provided in the capping sleeve 9a t and then turning it abou-t the axis of the shaft 6a until l-t cornes to a stop. The capping sleeve 9a is held in position by tightening on to it nuts 1L~a carried by the bolts 13a.
It is advan-tageous in -this embodiment o~ the in-vention to use capping sleeves which permi-t the weir height to be varied by 20 to 400 mm~
The presen-t degassing column is useful for a varie-ty of applica-tions, e. g. the re~oval of monomers from polymer dispersions,
HOE '77/H 017K
This invention relates to a degassing column for re~
moving monomers present in a polymer dispersion compris- :
ing a tubular shell provlded with a plurality of apertllred plates, said plates being vertically spaced wlthin said shell, a small gap uni~orm in width over the periphery being left between each of said plates ~nd sald shell~
each of said pla-tes being penetrated by at le~t one eccentrically arranged condui-t comprising a draining shaft in the upper portion thereof and a feed sha~t in the lower portion below the penetrated plate, the aper-tures in said plates having a diameter of less th~n 5 mm, and a surface portion of each plate underneath each oon-duit being impermeable, said impermeable sur~ace portionbeing one to two times the cross-section of said conduit.
In view of the great variety o~ liquid materlals, including in partlcular polymer di~persions, which may ~:
have to be freed from gas or vapour; e. g. vapours of monomers, ln a d~gassing column, and in view of the de-sirabllity o~ an improved degasifying effect~ it would be highly des~rable to have a de~a~sing column wherein the distance between the upper end o~ each draining shaft and the respective plate, i. e. the weir height, could be varied.
It is therefore and object of the present inven-tion to provide a degassing column of the type described in which column the weir height of the plates can be modi~ied ln a simple and inexpensive manner according to the par-ticular polymer dispersion which is to be treated ~nd the degree of degasi~ication which is aimed at. .
3~
~, According -to the presen~t inventlon3 we pro~ide a de~assi.ng column compri~ing a tubular ~hell provided wit,h a pl.ural.i-ty of ~pertured pl.ates; said pla-te~ being vertically ~paced withln said shell; a small gap uniform in Wi~t}l o~er the pe.riphery being left b~tween each of said plates and said shell; each of ~ald pla-tes being pe~etrated by at least one eccèntrically arran~ed con-dult comprising a drainislg shaft in ~the upper pf~rtion thereof and a feed shaft in the lower por-tion below ~he penetrated plate; the apertllres ln said pl~tes having a diameter of less than 5 mm; and a surface portion of each plate undernea-th each conduit ~Lng impermeable, s~id im permeable surface portion being one to two times the cross-seotion of said conduit; ln which degass:Lng col.u~n a capp~
ing sleeve is slipped over each drainin~ sha~-t, -the capping sleeves each compri~ing an upper portion whose cro~s-section is similar to that of -the draining shaft, and a lower por-tlon of larger cross section~ which lowe~ portion overlaps and is securely connected to the upper p~r-tion.
.0 Pre~erred features of the present invention provide-a) for each of the capping sleeves to be ~ormed in its lower por-tion with a plurality of slits distributed around its periphery, in which slits there are engaged respectlve bolts secured in a radial orientation to the draining shaft;
b) for the slits each to compr.ise a lower portion wh~ch extends in the axial direction of the capping sleeve and an upper portio~ which extends tran~ver~ely with re~pect thereto;
' : ;
3.a~ :
c) for the capping sleeves each to have three of the ~a:i.d sllts;
d) for the said bolts to be screw-th.readed, arld e) for -the capping sleeves to he held in position by means of` nuts screw-threadedly engaged on the said bolts.
In a degassing column according to -the present ln--vent.lon) i-t ls possible to provide the plates with per~
~orations spaced apart at interval.s of 15 mm, for example, : 10 so that ~olid matter is not llable to deposit evell if the wid-th over which the rings are supporting the plates is up to 20 mm. Solid matter is al~o not liable to d0po~it on the column wall inasmuch as we do no-t contemplate that the lat-ter should be very effectively heat-insulated, so that a condensate~ e. g~ wate~ if steam is pr~sent within , the colum~l, can contimlally form on the inside of the ; column shell and can run down ~n the ~orm of a liquid film producing a washing e~fect.
The impermeable sur~ace on eac,h plate below the re-spective shaft has an area which is pre.~erably 1 to 2 -times the cross-sectional area of the shaf-t.
In a typical construction in accordance with -the i~lvention, the distance ~etween -the upper end of each conduit and the respective plate is 80 to 400 rn.m, and 25 the lower end of each conduit terml.nates 10 to 100 mm above the pla-te below it.
Cer-tain embodlmen*s of the present invention are shown dlagrammatîcally in the accompanylng~ drawings, in w~ich:
;~ ~ 4 _ ~: .
3~
Figure 1a is a sectional side elevation view of the degassing column;
Figure 2a is a sectional side elevational ~lew of a draining shaft ha~ing a ~ap rnountlng slipped over it;
Figure 3a is a side view of a drainillg sha~t having a cap mounting slipped over it; and Figure 4a is a plan view of the draining sha~t of Figure 3a.
As can be seen in Figure la, a series of perforated plates 2a which are vertically space apar-t is arranged in a column shell 1a, a gap 3a uniform in wid-th around the periphery being left between each plate 2a and the column shell 1a. The plates 2a are penetrated by a plu-rality of stay bolts 4a, the portion of each stay bolt 4a extending between two ad~acent pla-tes 2a being con-centrically surrounded by a slee~e 5a, which ~upports an upper plate 2a, and which suppor-ts itself wi-th ~t~
lower end on a lower plate 2a. ~n eccentrically arranged conduit serves to provide a feed sha~t 7a which ter~inates above each plate 2a; also each plate 2a is penetrated by an eccentrically arranged conduit which serves to pro-vide a draining shaft 6a. Positioned below each feed shaft 7a, on the respective plate 2a, is a covering sheet 8. Slipped over each draining sha~t 6a i~ a capp-ing sleeve 9a, which enables the we~ height, i, e. the distance between the upper end o~ the drainin~ sha~t 6a (extended by means o~ -the capping slee~e 9 ) and the plate 2a, to be readily varied, in accordance with the length of the capping slee~e 9a which i~ selected. The , . .
. .
3~
capping sleeve 9a comprises an upper portion lOa (Figures 2a and 3a) of which the cross~sec-tion is similar to tha-t of the dra:ining shaft 6a, and a lower portion l1a o~ larger cross-section, which overlaps the upper portion 10a and i.s securely connected -there-t,o. The lower por-tion 11a of the capping sleeve 9a is formed wi-th a plurality of slits 12a (Figure 3a) which are d.istributed around it~ periphery at uniform angular intervals. The slits 12a have a lower portion which extends in the axial direction of the capping sleeve 9a and an upper portion which ex-tends transversely with respectthereto, thus giving a bayone~ connection of the capping sleeve 9a to the shaft 6a, Dis-tributed uniformly around the periphery o~ the draining shaft 6a and fastende radially there-to is a plurality of threaded bolts 13a (Figure 4a). The capping sleeve 9a is a-ttached by so presenting it to the shaft 6a tha-t the bolts 13a enter the slits 12a provided in the capping sleeve 9a t and then turning it abou-t the axis of the shaft 6a until l-t cornes to a stop. The capping sleeve 9a is held in position by tightening on to it nuts 1L~a carried by the bolts 13a.
It is advan-tageous in -this embodiment o~ the in-vention to use capping sleeves which permi-t the weir height to be varied by 20 to 400 mm~
The presen-t degassing column is useful for a varie-ty of applica-tions, e. g. the re~oval of monomers from polymer dispersions,
Claims (6)
1) A degassing column for removing monomers from poly mers present in dispersions comprising a tubular shell provided with a plurality of apertured plates, said plates being vertically spaced within said shell, a small gap uniform in width over the periphery being left between each plate and said shell; each of said plates being penetrated by at least one eccentrically arranged conduit comprising a draining shaft in the upper portion thereof and a feed shaft in the lower portion below the penetrated plate; the apertures in said plates having a diameter of less than 5 mm;
and a surface portion of each apertured plate under-neath each conduit being impermeable; said impermeable surface portion being one to two times the cross-sectional area of the conduit; in which degassing column a capping sleeve is slipped over each draining shaft and comprises an upper portion whose cross-section is similar to that of the draining shaft and a lower portion of larger cross-section, which lower portion overlaps and is securely connected to the upper portion.
and a surface portion of each apertured plate under-neath each conduit being impermeable; said impermeable surface portion being one to two times the cross-sectional area of the conduit; in which degassing column a capping sleeve is slipped over each draining shaft and comprises an upper portion whose cross-section is similar to that of the draining shaft and a lower portion of larger cross-section, which lower portion overlaps and is securely connected to the upper portion.
2) The column as claimed in claim 1, wherein each of the capping sleeves is formed in its lower portion with a plurality of slits distributed around its periphery, in which slits there are engaged re-spective bolts secured in a radial orientation to the draining shaft.
3) The column as claimed in claim 1, wherein the slits each comprise a lower portion which extends in the axial direction of the capping sleeve and an upper portion which extends transversely with respect thereto.
4) The column as claimed in claim 1, wherein the capping sleeves each have three of the said slits.
5) The column as claimed in claim 1, wherein the said bolts are screw-threaded.
6) The column as claimed in claim 1, wherein the capping sleeves are held in position by means of nuts screw-threadedly engaged on the said bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA370,134A CA1114310A (en) | 1977-04-28 | 1981-02-04 | Degassing column |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2718857.4 | 1977-04-28 | ||
| DE19772718857 DE2718857A1 (en) | 1977-04-28 | 1977-04-28 | Degassing column with equally spaced perforated plates - supported by peripheral ring and lugs and crossed by downcomers with adjustable overflow height |
| DE19772718858 DE2718858A1 (en) | 1977-04-28 | 1977-04-28 | Degassing column with equally spaced perforated plates - supported by peripheral ring and lugs and crossed by downcomers with adjustable overflow height |
| DEP2718858.5 | 1977-04-28 | ||
| CA301,550A CA1103592A (en) | 1977-04-28 | 1978-04-20 | Degassing column |
| CA370,134A CA1114310A (en) | 1977-04-28 | 1981-02-04 | Degassing column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1114310A true CA1114310A (en) | 1981-12-15 |
Family
ID=27426070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA370,134A Expired CA1114310A (en) | 1977-04-28 | 1981-02-04 | Degassing column |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1114310A (en) |
-
1981
- 1981-02-04 CA CA370,134A patent/CA1114310A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |