CA1163576A - Apparatus for removing finely divided solids from gas - Google Patents
Apparatus for removing finely divided solids from gasInfo
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- CA1163576A CA1163576A CA000396842A CA396842A CA1163576A CA 1163576 A CA1163576 A CA 1163576A CA 000396842 A CA000396842 A CA 000396842A CA 396842 A CA396842 A CA 396842A CA 1163576 A CA1163576 A CA 1163576A
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- vessel
- gas
- solids
- louver
- gas inlet
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Abstract
ABSTRACT
A high temperature filter for separating finely divided solids from gas comprising an outer, refractory lined, and inner generally cylindrical vessels having an uncleaned gas inlet pipe, a clean air discharge pipe, and two gravel feed pipes, all extending into the inner vessel and a common solids outlet in the lower end of the outer vessel.
Three elongated spaced apart louver assemblies are disposed within the inner vessel to provide therebetween spaces for this gravel. A gas inlet chamber is defined on one side of the inner vessel and is closed at its bottom end by a sealing closure plate, which extends from the air inlet side of the bottom end of the inner vessel to a track of a lower end of an outer louver assembly. Sealing and connecting of the gravel feed pipes and the gas discharge pipe, respectively, to the inner vessel and between both vessels, respectively, provide for thermally induced differential movement. The louver assemblies are supported by a track assembly connected to the inner walls of the inner vessel thereby permitting slidable movement of the louver assemblies frame. When coarse and fine gravel fill the spaces between the louver assembly, finely divided solids are removed from feed gas entering the unclear gas inlet pipe as this gas horizontally traverses through the coarse and then the fine gravel held between the spaces of the louver assemblies and is withdrawn from an open ended gas outlet chamber on the other side of the inner vessel.
A high temperature filter for separating finely divided solids from gas comprising an outer, refractory lined, and inner generally cylindrical vessels having an uncleaned gas inlet pipe, a clean air discharge pipe, and two gravel feed pipes, all extending into the inner vessel and a common solids outlet in the lower end of the outer vessel.
Three elongated spaced apart louver assemblies are disposed within the inner vessel to provide therebetween spaces for this gravel. A gas inlet chamber is defined on one side of the inner vessel and is closed at its bottom end by a sealing closure plate, which extends from the air inlet side of the bottom end of the inner vessel to a track of a lower end of an outer louver assembly. Sealing and connecting of the gravel feed pipes and the gas discharge pipe, respectively, to the inner vessel and between both vessels, respectively, provide for thermally induced differential movement. The louver assemblies are supported by a track assembly connected to the inner walls of the inner vessel thereby permitting slidable movement of the louver assemblies frame. When coarse and fine gravel fill the spaces between the louver assembly, finely divided solids are removed from feed gas entering the unclear gas inlet pipe as this gas horizontally traverses through the coarse and then the fine gravel held between the spaces of the louver assemblies and is withdrawn from an open ended gas outlet chamber on the other side of the inner vessel.
Description
~ ~ 6~5~6 Docket No. This invention relates to an apparatus for removing 2079-~F
finely divided solids from gas and, more specifically, to a high temperature filter for separating solids from high tem-perature gases through a mass o:E solid particulate material.
Such apparatus is described by U.S Patent No.4,017,278, granted ~April 12, 1977, wherein finely divided solids are re-moved from a feed gas by passing the gas through an elongated annular mass of moving solid particulate contact material held between two generally concentric cylindrical walls. The outer wall is louvered and their openings permit passage of most of the particles of contact material. The inner wall is perforated to permit passage of gas through the wall. The finely divided solids are trapped in the mass of contact material which is moved downwardly through and out of the annular space between the two concentric cylinder walls. The contact material is then ~reated to separate entrained finely divided solids and returned to the upper end of the annular space. A granular-bed filter constrlcted in accordance with the general design shown in such patent experienced structural failure during testing at the tem-perature environment, approximateIy 1500F, required for its operation.
A primary object of the invention is to provide an apparatus for separating finely divided solids from gas which is capable of functioning in a high temperature and pressure environment without experiencing structural failure.
Another object of the invention is to provide an improved apparatus for separating finely divided solids from high temperature gas.
An additional object of the invention is to provide an apparatus for separating finely divided solids from gas ~ 1 ~;3576 having louvered assemblies which are relatively easily replaced or repaired.
~ till another object of this invention is to provide an appara~us for separating finely divided solids from gas whose components are capable of withstanding thermally induced stresses resulting from high temperature operation.
A further object of this invention is to provide an apparatus for separating finely divided solids from gas which permits thermally induced differential movement between its components resulting from high temperature operation without deleteriously affecting its structural integrity.
A still further object of this invention is to pro-vide an apparatus for separating finely divided solids from gas utilizing particulate solid contact material, gravel, which permits such gravel to be quickly and easily changed and/or cleaned.
The foregoing and related objects are obtained in accordance with the invention which in its broader aspects pro-vides a high temperat~re apparatus for separating finely divided solids from gas comprising a first, generally cylindrical vessel having walls which are lined with high temperature refractory and having an upper section and a lower section and having; ga inlet and outlet openings disposed in its upper section, a plurality of solids inlet openings disposed in its upper section, and a solids outlet opening disposed in its lower section. Dis-posed within the first vesseI is a second, generally cylindrical vessel of lesser diameter than the first and having gas inlet arid outlet openings and a plurality of solids inlet openings all disposed irl its top section. Gas inlet means and gas outlet means are provided for guiding incoming gas and outgoing gas, ~ ~ 83576 respectively, connected through the gas inlet and outlet open~
ings of said first vessel to said second vessel, respectively, at its gas inlet and outlet openings, respectively. A solids inlet means, for guiding incoming particulate solids contact material, is connected through the inlet openings of the first vessel to the second vessel at its solids inlet openings. A
plurality of elongated, spaced apart, louver means are dis-posed within the second vessel to provide a plurality of elon-gated spaces for particulate solid contact material and whereby an elongated gas inlet chamber is defined between a wall of the second vessel and an outer one of the louver means. A closure member is disposed in the second vessel at its bottom end in sealing engagement therewith and this outer louver means thereby defining a bottom end of the gas inlet chamber.
In a narrower aspect of this invention, the louver means are generally rectangularly shaped and include a frame which has connected thereto a multiplicity of elongated double louvered members.
In an additional narrower aspect of t.his invention, the solids inlet and outlet means are connected to the solids ; inlet and outlet, respectively, of tne second vessel by a seal-ing means which permits thermally induced differential movement therebetween, and the gas outlet means includes a connecting means for permitting thermally induced movement therein.
Other objects and advantages will become apparent from the following description taken in conjunctlon with the accompanying drawing in which:
Fig. 1 is an eIevational cross section view of the apparatus according to the invention;
Fig. 2 is a top view of the apparatus shown in Fig. 1 ~i 31 635~6 with a portion of the interior shown cut-away for illustrative purposes;
Fig. 3 is a fragmentary cross section of a portion of the apparatus shown in Fig. 1, taken along the line 3-3;
Fig. 4 is a fragmentary cross section of a portion of the apparatus shown in Fig. 1, taken along the line 4-4;
Fig. 5 is ~n enlarged, cross section view of the third louvered assembly of the apparatus shown in Fig. l;
Fig. 6 is an enlarged, cross section view of the coarse solids inlet assembly of the apparatus shown in Fig. 1, taken along the line 6-6;
Fig. 7 is an enlarged, cross section view of the connecting means of the inner air gas discharge feed pipe of the apparatus shown in Fig. l; and Fig. 8 is an enlarged, cross section view of the thermal sealing assembly o~ coarse solids inlet assembly of the apparatus shown in Fig. 1.
Referring now to Figs. 1-4 of the drawings, a high temperature apparatus or filter for separating finely divided solids from gas, generally designated 10, comprises an outer vessel assembly 12, and inner vessel assembly 14 disposed there-in, filter assembly 16 disposed within and attached to said inner vessel assembly 14, and an unclean air or gas inlet assem-bly 18 and a gas discharge or outlet assembly 20, each connected to and through the top portions of both outer and inner vessel assemblies 12 and 14, respectively, and a solids inlet assembly 22 connected to said filter assembly 16 through said outer and inner vessel assemblies 12 and 14, respectively.
The outer vessel assembly 12 comprises a first or outer generally cylindrical, steel vessel 24 of approximately ~3.~6 sixteen and a half feet in length having its inner walls lined with a conventional high temperature refractory material or wall 26. The outer steel vessel is comprised of a ~langed cylindrical middle section 28, a flanged upper section or dome 30 and a flanged lower section or dome 32, all of which are conventionally bolted together at their flanged ends. The upper dome 30 has an unclean air or gas inlet opening 34 and an adjacent clean air discharge or gas outlet opening 36 dis-posed therein, which vertically extends through its section of inner refractory wall 26. Additionally, this upper dome 30 has disposed therein, to the side and between said air inlet and outlet 34 and 36, a plurality of solids inlet openings consist-ing of a coarse gravel inlet opening 38 and a fine gravel inlet opening 40, both of which extend angularly outwardly and toward said gas inlet opening 34 and gas outlet opening 36, respectively, through its section of inner refractory wall 26. A single gravel or solids outlet 42 is disposed in the center of the lower dome 32 which vertically extends through its section of inner refrac-tory wall 26.
The inner vessel assembly 14 comprises a second or inner, generally cylindrical, steel vessel 44 comprising a flanged cylindrical section 46 and a flanged top section or dome 48, all of which are conventionally bolted together at their flanged ends. The top dome 48 has an unclean air or gas inlet opening 50 and an adjacent clean air discharge cr gas outlet opening 52, disposed therein. Additionally, this top dome 48 has disposed therein, between said air inlet and out-let 50 and 52, respectively, a plurality of solids inlet open-ings consisting of a coarse gravel inlet opening 54 and a fine gravel inlet opening 56.
1 ~ 635~6 The filter assembly lS includes a plurality, three, elongated, vertically oriented, spaced apart, rectangularly shaped louver assemblies 58, 60 and 62, referred to as first, second and third louver assemblies, respectively, disposed within said inner vessel's section 46, to provide a plurality of elongated spaces, two in number, 64 and 66, for particula~e solid contact material, and a supporting assembly or means 68, connected to the inner walls of said inner vessel 44 for sup-porting said louver assemblies 58, 60 and 62, and for closing off a portion of a bottom end 70 of said inner vessel 44.
The vertical unclean gas inlet assembly or gas inlet means 18, for directing or guiding uncleaned gas therethrough is vertically oriented and is fixedly connected to the upper and top sections, 30 and 48, respectively, of the outer and inner vessels 12 and 14, respectively, through their respective gas inlet openings 34 and 50, respectively. Similarly, the vertically oriented clean gas discharge assembly or gas outlet means, 20, for guiding or directing outgoing air therethrough, is fixedly connected to the upper and top sections, 30 and 48, respectively, of the outer and inner vessels 12 and 14, respec-tively, through thei.r respective gas outlet openings 36 and 52, res~ectively.
The solids inle-t assembly or means 22 guide or direct incoming particulate solids contact material fed therethrough;
it includes a coarse and ~ine solids inlet assembly or means, 72 and 74, respectiveIy, for feeding coarse and fine incoming particulate solids contact material to the spaces 64 and 66, respectively, provided therefor, between louver assemblies 58 and 60, and 60 and 62, respectively. These coarse and fine inlet assemblies 72 and 741 respectively, extend generally ~ :~ 6357~
vertically through the upper and top sections, 30 and 48, respectively, of the outer and inner vessels 12 and 14, respec-tively, through their respective coarse and fine solids inlet openings 38 and 54, and 40 and 56, respectively, and their lower ends are in open communication with their respective spaces 64 and 66 which are provided for the coarse and fine gravel, respectively.
Each of the louvered assemblies, 58, 60 and 62, basically comprise a rectangularly shaped frame 76 and a multi~
plicity of horizontally oriented, elongated longitudinally ex-tending double louvered units 78 connected at their outer ends to vertically extending, side frame,members of frame 76. The louvered assemblies 58, 60 and 62 are supported within the inner vessel 44 by louver support assembly 68 which comprises and upper support assembly 80, a lower support assembly 82, and two side support assemblies 84 (only one of which is shown), all of which include, on their inner surface, U-shaped track means or tracks 86, 88, and 90, respectively, within which the frames 76 of the louvered assemblies 56~ 58 and 60 are supported and are slidably movable therein. Upper support assembly 80 includes three spaced apart, generally Y-shaped in cross section, units, 92, 94 and 96, each of which extend across the full width of the top dome 48 of the inner vessel 44, and are suitably attached as by welding at their upper ends, to the inner top wall of the top dome; their lower ends include the horizontally oriented tracks 86 also suitably attached as by welding. The lower support assembly 82 comprises a closure member 98 and a lower support unit 100. The lower support unit 100 functions as both an inner solids outlet and to support the louver assem-blies 58, 60 and 62 as they include horizontally extending ~ 3 ~3576 tracks 88 at their upper ends, which tracks 88 are suitably attached, as by welding, at their ends to the inner walls of the cylindrical section 46 of the inner vessel 44. Extending from tracks 38 of lower support unit 100 and disposed at its lower end within the upper end of solids outlet 42 is a tapered inner solids outlet assembly 102 having separate coarse and fine solids discharge passages 104 and 106, respectively. Dis-posed downstream of the solids 42 is a conventional valve (not shown) to permit draining of the solids from the inner vessel 44. Closure member 98 is disposed at the bottom end 70 of the inner vessel 44 and is in sealing engagement with it and the track 88 of an outer one of said louver assemblies, louver assembly 58, thereby defining a bottom end of an elongated gas inlet chamber 108 which chamber 10~ is defined between an inner wall of said inner vessel 44 and said outer louver assembly 5~.
On the other side of the inner vessel 44, and to t'ne right of louver assembly 62, is defined an open ended gas outlet chamber 109, Referring now specifically to Fig. 5 wherein the third or las louver assembly 62 is illustrated in detail, said louver assembly comprises a rectangularly shaped frame 76 (in plan view), a multiplicity of stacked~ elongated, horizontally oriented, longitudinally extending double louvered units 78 connected at their outer ends to the sides of frame 76, vertical dam elements 110 connected to each double louvered unit 78, and screen 112 ~ connected to the outer face of frame 76. The rectangularly : shaped frame 76 comprise horizontally oriented upper frame mem-ber 114 and lower frame member 116, and vertically oriented side frame members 118~ all of wl~ich frame members are generally U-shaped in cross section~ The double louvered units 78 each \
~ ~ ~35~6 comprise an inverted V-shaped louver member 120 in cross sec-tion which longitudinally extends horizontally within the frame 76 and is suitably attached, as by welding, at its ends, to and within side frame members 118 and a plurality of spaced apart conforming, generally inverted V-shaped gusset members or baffles 112 which are suitably connected, as by welding, to adjacent louvered members 120. A vertically oriented, narrow, rectangularly shaped dam 110 longitudinally extends the full length of each of the louvered members 120 from their upper apexes to which it is suitably attached, as by welding. These dams 110 and screen 112 are only utilized on the last louver assembly 62 and function, respectively, to drop out any heavy entrained particles and to screen out any large particles en-trained due, for example, to an upset in gas flow.
Referring now specifically to Fig. 6 wherein the coarse solids inlet assembly or means 72 is illustrated in de-tail, the fine solids inlet assembly or means 74 being of the same construction, comprises a flanged outer coarse gravel feel pipe 124 suitably connected, as by welding, at its lower 2Q end to the upper dome 30 of outer vessel assembly 12, an inner : gravel feed~pipe 126 suitably connected at its upper end, as by welding, to the upper end of the outer feed pipe 124 and connected at its lower end to the coarse gravel inlet 54 of the top dome 48 of the inner vessel through solids sealing assembly or sealing means 128 for permitting thermally induced movement between said top dome 48 and the inner feed pipe 126. This thermal sealing assembly 128 comprises a cylindrically shaped flanged inner vessel inlet pipe 130 which is suitably connected at its lower end, as by welding, to the top dome 48 at its inlet 44, a free floating "jiggle" plate 132 whose bottom face of its ~t ~ ~35~
lower end seats against the upper shoulder or flanged end 134 of said inlet pipe 130, and a cylindrically shaped flanged cap 136 which is suitably connected at its lower end as by welding, to the upper end of the inlet pipe's 130 outer wall and spaced sufficiently apart from shoulder 134 to define an annular space 138 for the lower end of jiggle plate 132 to fit partially within and to permit thermally induced lateral move-ment within the rest of t'ne space 138.
~eferring now specifically to Fig. 1, the unclean air gas inlet assembly 18, the construction of which is substan-tially identical to the gas discharge inlet assembly 20, com-prises a flanged outer gas inle-t feed pipe 140 suitably con-nected at its lower end, as by welding, to the upper dome 30 near its inlet 34, an inner air inlet feed pipe 142 s-uitably connected at its lower end, as by welding, to the top dome 48 at its gas inlet opening 50 and connected at its upper end through a conical support member 144 which is suitably con-nected, as by welding, at its lower end to the outside wall of said inner feed pipe 142 and connected at its upper end to the inside wall of said outer feed pipe 140. Inner gas inlet feed pipe 142 comprises an upper pipe 146 and a lower pipe 148 having connecting means 150, flanged upper and lower end of : upper and lower pipe 146 and 148 J respectively, bolted together on one side only. A connecting means 152 of inner air dis charge feed pipe 142 dif~ers from that of the inner gas inlet feed pipe in that it comprises a planar flanged lower end clamped within a U-shaped flanged upper end for permitting lateral movement therebetween eliminating thermally induced stress on said air discharge feed pipe 142. Appropriate mate-rials for all structural components, capable of functioning in a high temperature and pressure environment, are utilized, such ~ 1 ~357~
as stalnless steel alloys and preferably RA330.
In operation, when coarse and fine gravel fill their respective spaces 64 and 66, unclean gas,from a suitable source such as a pressurized fluidized-bed combustor (not shown) of the type described in U.S. Patent No. 4,164,846, granted August 21, 1979, having a temperature o about 1650F, directed into gas inlet assembly 18, travels vertically downward therein and enters gas inlet chamber 108 and then horizontally exits there-from through the vertically oriented filter column comprising the three louver assemblies 58, 60 and 62 and the coarse and fine gravel therebetween. As this gas traverses this column, any solid material contained in the gas stream will be lodged in the filter mediumJ the course and fine gravel; the cleaned gas enters the open-ended gas outlet chamber lQ9 and is then vertically and upwardly discharged through the air outlet assem-bly 20. Periodically, the filter medium, including captured particulate material will be drained from their spaces 64 and 66 within the inner vessel assembly 14 through the common solids outlet 42 and the particulate matter will then be conventionally separated external to apparatus 10; this cleaned filter media is then returned to the apparatus through the solids inlet assem-bly 22.
Although but one embodiment has been illustrated and described in detail, it is to be expressly understood that the invention is not limited thereto. Various changes can be made in the arrangement of parts without departing from the spirit and scope of the invention as the same will be now understood by those skilled in the art.
finely divided solids from gas and, more specifically, to a high temperature filter for separating solids from high tem-perature gases through a mass o:E solid particulate material.
Such apparatus is described by U.S Patent No.4,017,278, granted ~April 12, 1977, wherein finely divided solids are re-moved from a feed gas by passing the gas through an elongated annular mass of moving solid particulate contact material held between two generally concentric cylindrical walls. The outer wall is louvered and their openings permit passage of most of the particles of contact material. The inner wall is perforated to permit passage of gas through the wall. The finely divided solids are trapped in the mass of contact material which is moved downwardly through and out of the annular space between the two concentric cylinder walls. The contact material is then ~reated to separate entrained finely divided solids and returned to the upper end of the annular space. A granular-bed filter constrlcted in accordance with the general design shown in such patent experienced structural failure during testing at the tem-perature environment, approximateIy 1500F, required for its operation.
A primary object of the invention is to provide an apparatus for separating finely divided solids from gas which is capable of functioning in a high temperature and pressure environment without experiencing structural failure.
Another object of the invention is to provide an improved apparatus for separating finely divided solids from high temperature gas.
An additional object of the invention is to provide an apparatus for separating finely divided solids from gas ~ 1 ~;3576 having louvered assemblies which are relatively easily replaced or repaired.
~ till another object of this invention is to provide an appara~us for separating finely divided solids from gas whose components are capable of withstanding thermally induced stresses resulting from high temperature operation.
A further object of this invention is to provide an apparatus for separating finely divided solids from gas which permits thermally induced differential movement between its components resulting from high temperature operation without deleteriously affecting its structural integrity.
A still further object of this invention is to pro-vide an apparatus for separating finely divided solids from gas utilizing particulate solid contact material, gravel, which permits such gravel to be quickly and easily changed and/or cleaned.
The foregoing and related objects are obtained in accordance with the invention which in its broader aspects pro-vides a high temperat~re apparatus for separating finely divided solids from gas comprising a first, generally cylindrical vessel having walls which are lined with high temperature refractory and having an upper section and a lower section and having; ga inlet and outlet openings disposed in its upper section, a plurality of solids inlet openings disposed in its upper section, and a solids outlet opening disposed in its lower section. Dis-posed within the first vesseI is a second, generally cylindrical vessel of lesser diameter than the first and having gas inlet arid outlet openings and a plurality of solids inlet openings all disposed irl its top section. Gas inlet means and gas outlet means are provided for guiding incoming gas and outgoing gas, ~ ~ 83576 respectively, connected through the gas inlet and outlet open~
ings of said first vessel to said second vessel, respectively, at its gas inlet and outlet openings, respectively. A solids inlet means, for guiding incoming particulate solids contact material, is connected through the inlet openings of the first vessel to the second vessel at its solids inlet openings. A
plurality of elongated, spaced apart, louver means are dis-posed within the second vessel to provide a plurality of elon-gated spaces for particulate solid contact material and whereby an elongated gas inlet chamber is defined between a wall of the second vessel and an outer one of the louver means. A closure member is disposed in the second vessel at its bottom end in sealing engagement therewith and this outer louver means thereby defining a bottom end of the gas inlet chamber.
In a narrower aspect of this invention, the louver means are generally rectangularly shaped and include a frame which has connected thereto a multiplicity of elongated double louvered members.
In an additional narrower aspect of t.his invention, the solids inlet and outlet means are connected to the solids ; inlet and outlet, respectively, of tne second vessel by a seal-ing means which permits thermally induced differential movement therebetween, and the gas outlet means includes a connecting means for permitting thermally induced movement therein.
Other objects and advantages will become apparent from the following description taken in conjunctlon with the accompanying drawing in which:
Fig. 1 is an eIevational cross section view of the apparatus according to the invention;
Fig. 2 is a top view of the apparatus shown in Fig. 1 ~i 31 635~6 with a portion of the interior shown cut-away for illustrative purposes;
Fig. 3 is a fragmentary cross section of a portion of the apparatus shown in Fig. 1, taken along the line 3-3;
Fig. 4 is a fragmentary cross section of a portion of the apparatus shown in Fig. 1, taken along the line 4-4;
Fig. 5 is ~n enlarged, cross section view of the third louvered assembly of the apparatus shown in Fig. l;
Fig. 6 is an enlarged, cross section view of the coarse solids inlet assembly of the apparatus shown in Fig. 1, taken along the line 6-6;
Fig. 7 is an enlarged, cross section view of the connecting means of the inner air gas discharge feed pipe of the apparatus shown in Fig. l; and Fig. 8 is an enlarged, cross section view of the thermal sealing assembly o~ coarse solids inlet assembly of the apparatus shown in Fig. 1.
Referring now to Figs. 1-4 of the drawings, a high temperature apparatus or filter for separating finely divided solids from gas, generally designated 10, comprises an outer vessel assembly 12, and inner vessel assembly 14 disposed there-in, filter assembly 16 disposed within and attached to said inner vessel assembly 14, and an unclean air or gas inlet assem-bly 18 and a gas discharge or outlet assembly 20, each connected to and through the top portions of both outer and inner vessel assemblies 12 and 14, respectively, and a solids inlet assembly 22 connected to said filter assembly 16 through said outer and inner vessel assemblies 12 and 14, respectively.
The outer vessel assembly 12 comprises a first or outer generally cylindrical, steel vessel 24 of approximately ~3.~6 sixteen and a half feet in length having its inner walls lined with a conventional high temperature refractory material or wall 26. The outer steel vessel is comprised of a ~langed cylindrical middle section 28, a flanged upper section or dome 30 and a flanged lower section or dome 32, all of which are conventionally bolted together at their flanged ends. The upper dome 30 has an unclean air or gas inlet opening 34 and an adjacent clean air discharge or gas outlet opening 36 dis-posed therein, which vertically extends through its section of inner refractory wall 26. Additionally, this upper dome 30 has disposed therein, to the side and between said air inlet and outlet 34 and 36, a plurality of solids inlet openings consist-ing of a coarse gravel inlet opening 38 and a fine gravel inlet opening 40, both of which extend angularly outwardly and toward said gas inlet opening 34 and gas outlet opening 36, respectively, through its section of inner refractory wall 26. A single gravel or solids outlet 42 is disposed in the center of the lower dome 32 which vertically extends through its section of inner refrac-tory wall 26.
The inner vessel assembly 14 comprises a second or inner, generally cylindrical, steel vessel 44 comprising a flanged cylindrical section 46 and a flanged top section or dome 48, all of which are conventionally bolted together at their flanged ends. The top dome 48 has an unclean air or gas inlet opening 50 and an adjacent clean air discharge cr gas outlet opening 52, disposed therein. Additionally, this top dome 48 has disposed therein, between said air inlet and out-let 50 and 52, respectively, a plurality of solids inlet open-ings consisting of a coarse gravel inlet opening 54 and a fine gravel inlet opening 56.
1 ~ 635~6 The filter assembly lS includes a plurality, three, elongated, vertically oriented, spaced apart, rectangularly shaped louver assemblies 58, 60 and 62, referred to as first, second and third louver assemblies, respectively, disposed within said inner vessel's section 46, to provide a plurality of elongated spaces, two in number, 64 and 66, for particula~e solid contact material, and a supporting assembly or means 68, connected to the inner walls of said inner vessel 44 for sup-porting said louver assemblies 58, 60 and 62, and for closing off a portion of a bottom end 70 of said inner vessel 44.
The vertical unclean gas inlet assembly or gas inlet means 18, for directing or guiding uncleaned gas therethrough is vertically oriented and is fixedly connected to the upper and top sections, 30 and 48, respectively, of the outer and inner vessels 12 and 14, respectively, through their respective gas inlet openings 34 and 50, respectively. Similarly, the vertically oriented clean gas discharge assembly or gas outlet means, 20, for guiding or directing outgoing air therethrough, is fixedly connected to the upper and top sections, 30 and 48, respectively, of the outer and inner vessels 12 and 14, respec-tively, through thei.r respective gas outlet openings 36 and 52, res~ectively.
The solids inle-t assembly or means 22 guide or direct incoming particulate solids contact material fed therethrough;
it includes a coarse and ~ine solids inlet assembly or means, 72 and 74, respectiveIy, for feeding coarse and fine incoming particulate solids contact material to the spaces 64 and 66, respectively, provided therefor, between louver assemblies 58 and 60, and 60 and 62, respectively. These coarse and fine inlet assemblies 72 and 741 respectively, extend generally ~ :~ 6357~
vertically through the upper and top sections, 30 and 48, respectively, of the outer and inner vessels 12 and 14, respec-tively, through their respective coarse and fine solids inlet openings 38 and 54, and 40 and 56, respectively, and their lower ends are in open communication with their respective spaces 64 and 66 which are provided for the coarse and fine gravel, respectively.
Each of the louvered assemblies, 58, 60 and 62, basically comprise a rectangularly shaped frame 76 and a multi~
plicity of horizontally oriented, elongated longitudinally ex-tending double louvered units 78 connected at their outer ends to vertically extending, side frame,members of frame 76. The louvered assemblies 58, 60 and 62 are supported within the inner vessel 44 by louver support assembly 68 which comprises and upper support assembly 80, a lower support assembly 82, and two side support assemblies 84 (only one of which is shown), all of which include, on their inner surface, U-shaped track means or tracks 86, 88, and 90, respectively, within which the frames 76 of the louvered assemblies 56~ 58 and 60 are supported and are slidably movable therein. Upper support assembly 80 includes three spaced apart, generally Y-shaped in cross section, units, 92, 94 and 96, each of which extend across the full width of the top dome 48 of the inner vessel 44, and are suitably attached as by welding at their upper ends, to the inner top wall of the top dome; their lower ends include the horizontally oriented tracks 86 also suitably attached as by welding. The lower support assembly 82 comprises a closure member 98 and a lower support unit 100. The lower support unit 100 functions as both an inner solids outlet and to support the louver assem-blies 58, 60 and 62 as they include horizontally extending ~ 3 ~3576 tracks 88 at their upper ends, which tracks 88 are suitably attached, as by welding, at their ends to the inner walls of the cylindrical section 46 of the inner vessel 44. Extending from tracks 38 of lower support unit 100 and disposed at its lower end within the upper end of solids outlet 42 is a tapered inner solids outlet assembly 102 having separate coarse and fine solids discharge passages 104 and 106, respectively. Dis-posed downstream of the solids 42 is a conventional valve (not shown) to permit draining of the solids from the inner vessel 44. Closure member 98 is disposed at the bottom end 70 of the inner vessel 44 and is in sealing engagement with it and the track 88 of an outer one of said louver assemblies, louver assembly 58, thereby defining a bottom end of an elongated gas inlet chamber 108 which chamber 10~ is defined between an inner wall of said inner vessel 44 and said outer louver assembly 5~.
On the other side of the inner vessel 44, and to t'ne right of louver assembly 62, is defined an open ended gas outlet chamber 109, Referring now specifically to Fig. 5 wherein the third or las louver assembly 62 is illustrated in detail, said louver assembly comprises a rectangularly shaped frame 76 (in plan view), a multiplicity of stacked~ elongated, horizontally oriented, longitudinally extending double louvered units 78 connected at their outer ends to the sides of frame 76, vertical dam elements 110 connected to each double louvered unit 78, and screen 112 ~ connected to the outer face of frame 76. The rectangularly : shaped frame 76 comprise horizontally oriented upper frame mem-ber 114 and lower frame member 116, and vertically oriented side frame members 118~ all of wl~ich frame members are generally U-shaped in cross section~ The double louvered units 78 each \
~ ~ ~35~6 comprise an inverted V-shaped louver member 120 in cross sec-tion which longitudinally extends horizontally within the frame 76 and is suitably attached, as by welding, at its ends, to and within side frame members 118 and a plurality of spaced apart conforming, generally inverted V-shaped gusset members or baffles 112 which are suitably connected, as by welding, to adjacent louvered members 120. A vertically oriented, narrow, rectangularly shaped dam 110 longitudinally extends the full length of each of the louvered members 120 from their upper apexes to which it is suitably attached, as by welding. These dams 110 and screen 112 are only utilized on the last louver assembly 62 and function, respectively, to drop out any heavy entrained particles and to screen out any large particles en-trained due, for example, to an upset in gas flow.
Referring now specifically to Fig. 6 wherein the coarse solids inlet assembly or means 72 is illustrated in de-tail, the fine solids inlet assembly or means 74 being of the same construction, comprises a flanged outer coarse gravel feel pipe 124 suitably connected, as by welding, at its lower 2Q end to the upper dome 30 of outer vessel assembly 12, an inner : gravel feed~pipe 126 suitably connected at its upper end, as by welding, to the upper end of the outer feed pipe 124 and connected at its lower end to the coarse gravel inlet 54 of the top dome 48 of the inner vessel through solids sealing assembly or sealing means 128 for permitting thermally induced movement between said top dome 48 and the inner feed pipe 126. This thermal sealing assembly 128 comprises a cylindrically shaped flanged inner vessel inlet pipe 130 which is suitably connected at its lower end, as by welding, to the top dome 48 at its inlet 44, a free floating "jiggle" plate 132 whose bottom face of its ~t ~ ~35~
lower end seats against the upper shoulder or flanged end 134 of said inlet pipe 130, and a cylindrically shaped flanged cap 136 which is suitably connected at its lower end as by welding, to the upper end of the inlet pipe's 130 outer wall and spaced sufficiently apart from shoulder 134 to define an annular space 138 for the lower end of jiggle plate 132 to fit partially within and to permit thermally induced lateral move-ment within the rest of t'ne space 138.
~eferring now specifically to Fig. 1, the unclean air gas inlet assembly 18, the construction of which is substan-tially identical to the gas discharge inlet assembly 20, com-prises a flanged outer gas inle-t feed pipe 140 suitably con-nected at its lower end, as by welding, to the upper dome 30 near its inlet 34, an inner air inlet feed pipe 142 s-uitably connected at its lower end, as by welding, to the top dome 48 at its gas inlet opening 50 and connected at its upper end through a conical support member 144 which is suitably con-nected, as by welding, at its lower end to the outside wall of said inner feed pipe 142 and connected at its upper end to the inside wall of said outer feed pipe 140. Inner gas inlet feed pipe 142 comprises an upper pipe 146 and a lower pipe 148 having connecting means 150, flanged upper and lower end of : upper and lower pipe 146 and 148 J respectively, bolted together on one side only. A connecting means 152 of inner air dis charge feed pipe 142 dif~ers from that of the inner gas inlet feed pipe in that it comprises a planar flanged lower end clamped within a U-shaped flanged upper end for permitting lateral movement therebetween eliminating thermally induced stress on said air discharge feed pipe 142. Appropriate mate-rials for all structural components, capable of functioning in a high temperature and pressure environment, are utilized, such ~ 1 ~357~
as stalnless steel alloys and preferably RA330.
In operation, when coarse and fine gravel fill their respective spaces 64 and 66, unclean gas,from a suitable source such as a pressurized fluidized-bed combustor (not shown) of the type described in U.S. Patent No. 4,164,846, granted August 21, 1979, having a temperature o about 1650F, directed into gas inlet assembly 18, travels vertically downward therein and enters gas inlet chamber 108 and then horizontally exits there-from through the vertically oriented filter column comprising the three louver assemblies 58, 60 and 62 and the coarse and fine gravel therebetween. As this gas traverses this column, any solid material contained in the gas stream will be lodged in the filter mediumJ the course and fine gravel; the cleaned gas enters the open-ended gas outlet chamber lQ9 and is then vertically and upwardly discharged through the air outlet assem-bly 20. Periodically, the filter medium, including captured particulate material will be drained from their spaces 64 and 66 within the inner vessel assembly 14 through the common solids outlet 42 and the particulate matter will then be conventionally separated external to apparatus 10; this cleaned filter media is then returned to the apparatus through the solids inlet assem-bly 22.
Although but one embodiment has been illustrated and described in detail, it is to be expressly understood that the invention is not limited thereto. Various changes can be made in the arrangement of parts without departing from the spirit and scope of the invention as the same will be now understood by those skilled in the art.
Claims (10)
1. High temperature apparatus for separating finely divided solids from gas comprising:
a first generally cylindrical vessel having walls which are lined with high temperature refractory and having an upper section and a lower section and having a gas inlet opening and a gas outlet opening disposed in its upper section and having a plurality of solids inlet openings disposed in its upper section and a solids outlet opening disposed in its lower section, a second generally cylindrical vessel having a top section and having a gas inlet opening, a gas outlet open-ing and a plurality of solids inlet openings dis-posed in its top section and having a diameter less than that of the first vessel and disposed within the first vessel, gas inlet means, for guiding incoming gas, connected through said gas inlet opening of said first vessel to said second vessel at its gas inlet opening, gas outlet means, for guiding outgoing gas, connected through said gas outlet opening of said first vessel to said second vessel at its gas outlet opening, solids inlet means, for guiding incoming particulate solids contact material, connected through said inlet open-ings of said first vessel to said second vessel at its solids inlet openings, a plurality of elongated, spaced apart, louver means dis-posed within said second vessel to provide a plural-ity of elongated spaces for particulate solid contact material and whereby an elongated gas inlet chamber is defined between a wall of said second vessel and an outer one of said louver means, and a closure member disposed in said second vessel at its bottom end and in sealing engagement with the bottom end of said second vessel and said outer one of said louver means thereby defining a bottom end of said gas inlet chamber, and an outlet chamber is defined be-tween a wall of said second vessel and another outer louver means.
a first generally cylindrical vessel having walls which are lined with high temperature refractory and having an upper section and a lower section and having a gas inlet opening and a gas outlet opening disposed in its upper section and having a plurality of solids inlet openings disposed in its upper section and a solids outlet opening disposed in its lower section, a second generally cylindrical vessel having a top section and having a gas inlet opening, a gas outlet open-ing and a plurality of solids inlet openings dis-posed in its top section and having a diameter less than that of the first vessel and disposed within the first vessel, gas inlet means, for guiding incoming gas, connected through said gas inlet opening of said first vessel to said second vessel at its gas inlet opening, gas outlet means, for guiding outgoing gas, connected through said gas outlet opening of said first vessel to said second vessel at its gas outlet opening, solids inlet means, for guiding incoming particulate solids contact material, connected through said inlet open-ings of said first vessel to said second vessel at its solids inlet openings, a plurality of elongated, spaced apart, louver means dis-posed within said second vessel to provide a plural-ity of elongated spaces for particulate solid contact material and whereby an elongated gas inlet chamber is defined between a wall of said second vessel and an outer one of said louver means, and a closure member disposed in said second vessel at its bottom end and in sealing engagement with the bottom end of said second vessel and said outer one of said louver means thereby defining a bottom end of said gas inlet chamber, and an outlet chamber is defined be-tween a wall of said second vessel and another outer louver means.
2. The apparatus of claim 1 wherein a mass of particu-late solid contact material fills the spaces between said plurality of louver means.
3. The apparatus of claim 2 wherein a mass of coarse particulate solid contact material fills the space between two of said plurality of louver means proximal said gas inlet chamber.
4. The apparatus of claim 2 wherein a mass of fine particulate solid contact material fills the space between two of said plurality of louver means distal said gas inlet chamber.
5. The apparatus of claim 1 wherein each of said louver means are generally rectangularly shaped and includes a frame and a multiplicity of elongated double louvered members con-nected to said frame.
6. The apparatus of claim 1 wherein said solids inlet and outlet means are connected to said solids inlet and out-let openings, respectively, of said second vessel by a seal-ing means for permitting thermally induced differential move-ment therebetween.
7. The apparatus of claim 1 wherein said gas inlet and outlet means are fixedly connected to said gas inlet and out-let openings, respectively, of said first vessel.
8. The apparatus of claim 1, further comprising support-ing means, connected to said inner wall of said second vessel, for supporting said louver means, comprising track means within which said frame is slidably movable.
9. The apparatus of claim 1 wherein the said louver means most distal from said gas inlet chamber includes a screen extending across its outer face.
10. The apparatus of claim 1 wherein said gas outlet means includes a connecting means for permitting thermally induced differential movement therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000396842A CA1163576A (en) | 1982-02-23 | 1982-02-23 | Apparatus for removing finely divided solids from gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000396842A CA1163576A (en) | 1982-02-23 | 1982-02-23 | Apparatus for removing finely divided solids from gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1163576A true CA1163576A (en) | 1984-03-13 |
Family
ID=4122142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000396842A Expired CA1163576A (en) | 1982-02-23 | 1982-02-23 | Apparatus for removing finely divided solids from gas |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1163576A (en) |
-
1982
- 1982-02-23 CA CA000396842A patent/CA1163576A/en not_active Expired
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