CA1207224A - Means for removing gaseous components and/or solid impurities present in a gaseous fluid flow - Google Patents
Means for removing gaseous components and/or solid impurities present in a gaseous fluid flowInfo
- Publication number
- CA1207224A CA1207224A CA000409783A CA409783A CA1207224A CA 1207224 A CA1207224 A CA 1207224A CA 000409783 A CA000409783 A CA 000409783A CA 409783 A CA409783 A CA 409783A CA 1207224 A CA1207224 A CA 1207224A
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- fluid flow
- inlet
- flow
- connector
- gaseous
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Abstract
ABSTRACT OF THE DISCLOSURE
The invention provides an apparatus for removing gaseous components and/or solid impurities present in a gaseous fluid flow which comprises a frame structure, a fluid flow inlet connector, disposed within the frame struc-ture, a scrubber means, an exit connector for carrying off the purified fluid flow, and a connector for introducing scrubbing liquid into the means and contacting it with the fluid flow. The scrubbing liquid exit flow has been dis-posed to pass through the fluid flow inlet connector in opposite direction with reference to the fluid flow. The end region adjacent to the scrubber means of the fluid flow inlet connector has a diminishing cross sectional diameter to the purpose of accelerating the flowing fluid flow before the fluid flow enters the scrubber means. The inlet connec-tor is provided with holes which have been adapted to receive into the inlet connector the return flow of the scrubbing liquid. The holes have been disposed in that region of the inlet connector where the flow of the fluid flow is not accelerated, whereby the scrubbing liquid return flow within the inlet connector is prevented from being entrained with the fluid flow and produces pre-purification of the fluid flow.
The invention provides an apparatus for removing gaseous components and/or solid impurities present in a gaseous fluid flow which comprises a frame structure, a fluid flow inlet connector, disposed within the frame struc-ture, a scrubber means, an exit connector for carrying off the purified fluid flow, and a connector for introducing scrubbing liquid into the means and contacting it with the fluid flow. The scrubbing liquid exit flow has been dis-posed to pass through the fluid flow inlet connector in opposite direction with reference to the fluid flow. The end region adjacent to the scrubber means of the fluid flow inlet connector has a diminishing cross sectional diameter to the purpose of accelerating the flowing fluid flow before the fluid flow enters the scrubber means. The inlet connec-tor is provided with holes which have been adapted to receive into the inlet connector the return flow of the scrubbing liquid. The holes have been disposed in that region of the inlet connector where the flow of the fluid flow is not accelerated, whereby the scrubbing liquid return flow within the inlet connector is prevented from being entrained with the fluid flow and produces pre-purification of the fluid flow.
Description
~2~7~2~
'I'he present invention relates to an apparatus for the removal of gaseous components and/or solid impurities present in a gaseous fluid flow, said means comprising a frame structure, an inle-t connector for the fluid flow, accommodated wi-thin the frame structure a scrubber means, an exit connector for carrying off the purified fluid flow, and a connector for conductlng a scrubbing liquid into the means and for contacting this liquid with the fluid flow, and in said means the exit flow of the scrubbing liquid having been disposed to pass through the fluid flow inlet connector in a direction opposi-te to -the fluid flow.
Gaseous fluid flows frequently con-tain impurities both in -the form of gaseous components and of solid par-ticles, which have to be removed prior to blowing out or re-using the fluid flow. In practice that situation is also frequently encountered in which -the gas flow contains solid components in such abundance that their separation is indicated before the flow en-ters -the scrubber. It is common in usual circums-tances to use -towards purification of the gaseous fluid flow a wet scrubber, in which the gaseous fluid flow is conducted into the frame portion of a separa-tor, in other words, into a fluid tank or reaction portion, where it is tried to bring the scrubbing liquid and the gaseous fluid flow into -the most complete contact possible with each other. At this scrubbing phase a-t leas-t part of -the coarser fraction of the solid ma-tter separates and remains in the separating tank. However, endeavours are mostly to achieve that -the greater par-t of the solid matter is separated in dry state already, before the scrubber, either in a settling chamber or in a cyclone separator. By this design the advantage is gained that the quantity of impurities carried into the scrubbing liquid is minimized, whence the amount of sludge that has to be carried off will also remain minimal. After the scrubber part usually a blower is provided because then the wear suffered by the
'I'he present invention relates to an apparatus for the removal of gaseous components and/or solid impurities present in a gaseous fluid flow, said means comprising a frame structure, an inle-t connector for the fluid flow, accommodated wi-thin the frame structure a scrubber means, an exit connector for carrying off the purified fluid flow, and a connector for conductlng a scrubbing liquid into the means and for contacting this liquid with the fluid flow, and in said means the exit flow of the scrubbing liquid having been disposed to pass through the fluid flow inlet connector in a direction opposi-te to -the fluid flow.
Gaseous fluid flows frequently con-tain impurities both in -the form of gaseous components and of solid par-ticles, which have to be removed prior to blowing out or re-using the fluid flow. In practice that situation is also frequently encountered in which -the gas flow contains solid components in such abundance that their separation is indicated before the flow en-ters -the scrubber. It is common in usual circums-tances to use -towards purification of the gaseous fluid flow a wet scrubber, in which the gaseous fluid flow is conducted into the frame portion of a separa-tor, in other words, into a fluid tank or reaction portion, where it is tried to bring the scrubbing liquid and the gaseous fluid flow into -the most complete contact possible with each other. At this scrubbing phase a-t leas-t part of -the coarser fraction of the solid ma-tter separates and remains in the separating tank. However, endeavours are mostly to achieve that -the greater par-t of the solid matter is separated in dry state already, before the scrubber, either in a settling chamber or in a cyclone separator. By this design the advantage is gained that the quantity of impurities carried into the scrubbing liquid is minimized, whence the amount of sludge that has to be carried off will also remain minimal. After the scrubber part usually a blower is provided because then the wear suffered by the
2;~
hlower will be less. After the blower follows furthermore a droplet separator; depending on the application thi.s may consist of a - la -'I
~Z~i~2~L
grille, a set of gratings, droplet separators resembling a cyclone separator, various rotating and round towers, etc.
In scrubber designs oE prior art, the blower is usually similar to a conventional centrifugal blower. A blower design of the so-called disintegrator -type is also known in the art, in which -the fluid flow is directed with its impuri-ties, as is also the scrubbing liquid. A design of this kind requires high power inpu-t from the drive, and -the wear of the blower is also high.
In scrubbers of -the ven-turi type, the gaseous fluid flow is accelerated with its impurities in the venturi sec-tion -to gain a high velocity, and a-t the same -time -the scrubb-ing liquid is inducted into -the accelerated Eluid flow. Af-ter the venturi section, whereat -the ve:Locity of -the gaseous Eluid Elow is reduced, there is a droplet separa-tor, where, in the Eirst place, the impurities serve as crys-tallisation nuclei for the drops.
One has also towards purifica-tion of a gaseous fluid flow employed the so-called S-wave scrubber, where the gaseous fluidflow, after flowing together wi-th the scrubbing liquid through an S-wave shaped slit ends up in free space and thence further in a blower. where is no actual separate drople-t separator: separation of droplets takes place in the free space after the S-wave before the blower. In this design, too, the risk is present -that supercondensing moisture may be en-trained with -the gaseous fluid flow and therefore droplets are flung out and into the surroundings.
The present invention provides an improvement of scrubber designs known in the art, in particular a scrubber design by which a high scrubbing efficiency is attained without scrubbers requiring a high energy input. The other objec-ts of the invention, and the advantages gainable with its aid, will , - 2 -7~2~
become apparent Erom the disclosure of the inven-tion.
According to -the present invention the end region adjacent to the scrubber means of the fluid flow inlet connec-tor has a diminishing cross sectional diameter for the purposeof accelerating the fluid flow passing through said inlet connector before i-t enters said scrubber means, and said inle-t connector has been provided with holes adapted to receive the return flow of thescrubbing liquid into said inlet connector, said holes having been disposed in tha-t region of said inlet connector where the fluid flow is not being accelerated, whereby the return flow of the scrubbing liquid within the in-let connector is prevented from being entrained with -the fluid Elow and ef:Eects pre-purification of -the fluid flow.
According to the present invention -therefore there i.s provldedanrapparatus for removlng gaseous components and/or solid impurities from a gaseous fluid flow, comprising: a frame struc-ture; scrubber means disposed within said frame structure;
discharge means -through which the purified gaseous fluid flow is discharged from said frame structure; means for introducing scrubbing liquid into said appara-tus and directing -the scrubb-ing liquid into contact with said gaseous fluid flow; fluid flow inle-t means communicating wi-th said frame structure through which said gaseous fluid flow is in-troduced in-to said frame struc-ture towards said scrubber means, said fluid flow inlet means having a region through which the gaseous fluid flow rate is not accelerated and another region through which -the flow rate is not accelerated and another region -through which the flow rate of -the gaseous fluid flow passing through said inletmeans is increased prior to said scrubber means;
opening means situtated in said inlet means through which a return flow of the scrubbing liquid passes -to enter into said inlet means and pass there-through in opposition to the direc-tion of the gaseous fluid flow, said opening means disposedin said region of said inlet means where the flow rate of the f I -- 3 gaseous fluid flow is not accelerated and shaped and disposed -to direct the scrubbing liquid return flow in said inlet means in a direction opposite to the direction of gaseous fluid flow and so that the scrubbing liquid return flow is not entrained in -the gaseous fluid flow.
In one embodimen-t of the present invention the fluid flow inlet means has a flow discharge orifice direc-ted -towards said scrubber means and wherein a discharge end por-tion of said scrubbing liquid inle-t means is disposed within said fluid flow inlet means in -the direction of said scrubbing means to direct the scrubbing liquid towards said discharge oriEice of said fluid flow inlet means.
Suitably said scrubbing means comprises blower means for further accelerating the already accelerated fluid flow discharge from said fluid flow inlet means and for directing a part of the purified fluid flow in the form of a recircula-ting flow -through said opening means provided in said fluid 2U flow inlet means and into -the lat-tex, said blower means being positioned and arranged so as -to separate drople-ts ou-t of said fluid flow. Preferably said blower means comprises means for flinging droplets towards said opening means in a manner so that the scrubbing liquid passing through said opening means into said fluid flow inlet means is set into rotary motion within said fluid flow inlet means, whereby an efficient pre-purifying of the fluid flow is obtained in said fluid flow inlet means progressing in the direction opposite -to -the direc-tion of the flow of the gaseous fluid flow -therein.
Desirably said end region of said fluid flow inlet means has a substantially frusto-conical configura-tion taper-ing in the direction towards said scrubber means. More pre-ferably the apparatus comprises means for directing the gaseous fluid flow through said inlet means in a substantially rota-tional rnanner about a vertical axis of said inlet means, and - 3a -I''' .
7Z2~
in which said opening means directs said return flow of the scrubbing liquid in-to said inlet means in a rotational direc-tion substantially the same as -the rotational direction of said gaseous fluid flow.
sy means of -the invention numerous significan-t ad-vantages are gained. By the means of the inven-tion a solution is achieved wherein only the gas which has already been nearly purified is carried to -the final scrubbing together with a minimal scrubbing liquid quantity, with the consequence that the solid matter loading of -the gas is minimal. It is -then possible to manage in the driving of the blower means employed as scrubber means with low mo-tor outputs, without any major amounts of energy, and at -the same -time the mos-t efficient venturi action possible is still attained; in other words, one achieves high scrubbing efficiency and high veloci--ties oE the gaseous fluid Elow, up to 60-100 m/s for ins-tance.
In the subsequent droplet separation -the veloci-ty of the gaseous Eluid flow is reduced enough to make the liquid drople-ts separate and to enable them to run along -the walls of the frame s-tructure and down to the bottom, and further through aper-tures in the inlet connector into the inlet connector for pre-purification of the gaseous fluid flow. In the design of the invention in fact an energy consumption figure as low as 1 HP
per 1000 m3/hr of gaseous fluid flow to be washed is achieved.
The external disposable subatmospheric pressure will be abou-t 2000 Pa, -that is, the efficiency of -the blower means is about 74%.
The present invention will be described in detail wi-th reference to a preferred embodiment of the invention, depicted in ?s~ - 3b -7~
the accompanying drawing, in which:-The single Figure is a schematic elevational view of an advantageous embodiment of the apparatus of the inven-tion.
In the Figure, the apparatus of the invention which in general is indicated by the reference numeral 10 comprises a frame s-tructure 11,12, a fluid flow inlet con-nec-tor 13, a scrubber means 15 disposed within the frame structure 11,12, an exit connector 14 for carrying off the purified fluid flow, and a connector 20 for introducing scrubbing liquid in-to the apparatus 10 and for contac-ting it wi-th the fluid flow. In this embodiment, the gaseous fluid flow has been disposed to flow through a pre-treatmen-t section 19 i.nto the inlet connec-tor 13, whereby when flowing into the means 10 -the gaseous fluid flow is already pre-puriEied. The pretreatment sec-tion 19 may consist e.g. of a cyclone separa-tor or a scrubbing tube or another equivalent construction known in itself in the art Erom which the gaseous fluid flow together with its non-abrasive impuri-ties is conducted in a rotary motion about a vertical axis into the inlet connector 13.
In this embodiment a blower means is used as scrubber rneans 15, this blower means having been arranged to be driven by a mo-tor 16. The impeller of the blower means 15 may be closed or open. In the present embodiment, the impeller has been provided with baffles 17 for directing the gaseous fluid flow along the vane of the blower means 15.
The motor 16 rotating the impeller has in this embodiment been carried on the wall 11 of the frame s-tructure by media-tion of rods 18. Between the rods 18 and the wall 11 ample free space is left, so that the gaseous fluid flow can pass upwardly towards the exit connector 14.
72~
In accordance with the fundamental concept of the invention, the end region 21 adjacent to the scrubber means 15 of the fluid fl.ow inlet connector 13 has a diminishing cross sec-tional diameter to the purpose of accelerating the incoming fluid flow before the fluid flow en-ters -the scrub-ber means 15. According to another important char-I- 4a -~2~7;~
acteristic feature, the inlet connector 13 has been provided with holes 22 adapted to receive the return flow of the scrubblng liquid and to admit it into the inlet connector 13. It should be partic-ularly noted that the holes 22 have been disposed to lie in that area of the inlet connector 13 where no acceleration is applied to the fluid flow.
In this embodiment, the scrubbing liquid inlet connector 20 has been disposed to pass through the wall of the fluid ilow inlet connector 13 and to be directed withln the inlet connector 13 towards its flow orifice pointing to the scrubber means 15.
a,~,c~6r,a,~6~r The mode of operation of the~4~n~ 10 of the invention is as follows. The gaseous fluid flow pre-purified in the pretreatment section 19 passes through the inlet connector 13 in a flow potion rotating about a vertical axis and it is accelerated in the conical section 21 from an initial velocity at point A about 7-12 m/s to 20-25 m/s at the point B. At this point, the scrubbing liquid is introduced through the connector 20 into the gaseous fluid flow, whereafter the blower means 15 accelerates the gaseous fluid flow and the scrubbing liquid from velocity 20-25 m/s at B to 60-100 m/s at C. By this design an extremely high scrubbing efficiency is achieved without need to employ a blower means 15 that would re-quire high motor power. In the droplet separation following after the acceleration, the velocity of the gaseous fluid flow drops so much in the cowl section 11 that the droplets will separate and are enabled ts run down along the wall 11 to the bottom 12 and further through the apertures 22 into the inlet connector 13.
The holes 22 in the inlet connector 13 have been shaped so that they are adapted to direct the scrubbing fluid return flow to rotate within the inlet connector 13 in a rotary motion with the same sense of rotatlon as the gaseous fluld flow progressing ln opposite direction, whereby the scrubbing fluid return flow as it flows downward in the inlet connector 13 passes perpendiculflrly to the upwardly flowing gaseous fluid flow and thus effects the Yost efficient possible prescrubbing of the gaseous fluid flow within the inlet connector 13. The downwardly flowing scrubbing IL-Iuid 7~2~
flows in this embodiment into a preseparatror, whlch possibly also incorporates a liquid collectlon tank.
f DO v~r In the~dQs~ according to the invention, the blower means lS has been advantageously carried out so that the blower means 15 as it accelerates the fluid flow directs part of the purlfied fluid flow as a recycling flow back through the holes 22 in the inlet connec-tor 13 into the inlet connector 13, whereby such a rotating fluid flow drives the liquid droplets flung out by the blower means 15 ahead of itself towards the holes 22 and causes the scrubbing liquid to be put in 2 rotary motion within the inlet connector 13.
In the embodiment depcited ln the figure of the drawing, the end portion 21 adjacent to the scrubber means 15 of the inlet connector 13 is conically tapering.
The means of the invention ls not critical as regards the design selected for the scrubber means 15. Rotary power to the impeller may naturally be provided with an externally placed motor or by belt transmission, or using a hydraulic motor. The motor 16 may also be completely isolated from the gaseous fluid flow by covering it with appropriate protective shields. It is then for instance possible to cool the motor by an external air current. The exit connector 14 may equally be of another kind, and it may if required be provided e.g. with an additional droplet separator in order to ensure the best possible droplet separation. Moreover, the conical portion 21 of the inlet connector 13 may be replaced merely with a constricted aperture, through which the gaseous fluid flow is admitted to flow to the impeller of the blower means 15.
l7
hlower will be less. After the blower follows furthermore a droplet separator; depending on the application thi.s may consist of a - la -'I
~Z~i~2~L
grille, a set of gratings, droplet separators resembling a cyclone separator, various rotating and round towers, etc.
In scrubber designs oE prior art, the blower is usually similar to a conventional centrifugal blower. A blower design of the so-called disintegrator -type is also known in the art, in which -the fluid flow is directed with its impuri-ties, as is also the scrubbing liquid. A design of this kind requires high power inpu-t from the drive, and -the wear of the blower is also high.
In scrubbers of -the ven-turi type, the gaseous fluid flow is accelerated with its impurities in the venturi sec-tion -to gain a high velocity, and a-t the same -time -the scrubb-ing liquid is inducted into -the accelerated Eluid flow. Af-ter the venturi section, whereat -the ve:Locity of -the gaseous Eluid Elow is reduced, there is a droplet separa-tor, where, in the Eirst place, the impurities serve as crys-tallisation nuclei for the drops.
One has also towards purifica-tion of a gaseous fluid flow employed the so-called S-wave scrubber, where the gaseous fluidflow, after flowing together wi-th the scrubbing liquid through an S-wave shaped slit ends up in free space and thence further in a blower. where is no actual separate drople-t separator: separation of droplets takes place in the free space after the S-wave before the blower. In this design, too, the risk is present -that supercondensing moisture may be en-trained with -the gaseous fluid flow and therefore droplets are flung out and into the surroundings.
The present invention provides an improvement of scrubber designs known in the art, in particular a scrubber design by which a high scrubbing efficiency is attained without scrubbers requiring a high energy input. The other objec-ts of the invention, and the advantages gainable with its aid, will , - 2 -7~2~
become apparent Erom the disclosure of the inven-tion.
According to -the present invention the end region adjacent to the scrubber means of the fluid flow inlet connec-tor has a diminishing cross sectional diameter for the purposeof accelerating the fluid flow passing through said inlet connector before i-t enters said scrubber means, and said inle-t connector has been provided with holes adapted to receive the return flow of thescrubbing liquid into said inlet connector, said holes having been disposed in tha-t region of said inlet connector where the fluid flow is not being accelerated, whereby the return flow of the scrubbing liquid within the in-let connector is prevented from being entrained with -the fluid Elow and ef:Eects pre-purification of -the fluid flow.
According to the present invention -therefore there i.s provldedanrapparatus for removlng gaseous components and/or solid impurities from a gaseous fluid flow, comprising: a frame struc-ture; scrubber means disposed within said frame structure;
discharge means -through which the purified gaseous fluid flow is discharged from said frame structure; means for introducing scrubbing liquid into said appara-tus and directing -the scrubb-ing liquid into contact with said gaseous fluid flow; fluid flow inle-t means communicating wi-th said frame structure through which said gaseous fluid flow is in-troduced in-to said frame struc-ture towards said scrubber means, said fluid flow inlet means having a region through which the gaseous fluid flow rate is not accelerated and another region through which -the flow rate is not accelerated and another region -through which the flow rate of -the gaseous fluid flow passing through said inletmeans is increased prior to said scrubber means;
opening means situtated in said inlet means through which a return flow of the scrubbing liquid passes -to enter into said inlet means and pass there-through in opposition to the direc-tion of the gaseous fluid flow, said opening means disposedin said region of said inlet means where the flow rate of the f I -- 3 gaseous fluid flow is not accelerated and shaped and disposed -to direct the scrubbing liquid return flow in said inlet means in a direction opposite to the direction of gaseous fluid flow and so that the scrubbing liquid return flow is not entrained in -the gaseous fluid flow.
In one embodimen-t of the present invention the fluid flow inlet means has a flow discharge orifice direc-ted -towards said scrubber means and wherein a discharge end por-tion of said scrubbing liquid inle-t means is disposed within said fluid flow inlet means in -the direction of said scrubbing means to direct the scrubbing liquid towards said discharge oriEice of said fluid flow inlet means.
Suitably said scrubbing means comprises blower means for further accelerating the already accelerated fluid flow discharge from said fluid flow inlet means and for directing a part of the purified fluid flow in the form of a recircula-ting flow -through said opening means provided in said fluid 2U flow inlet means and into -the lat-tex, said blower means being positioned and arranged so as -to separate drople-ts ou-t of said fluid flow. Preferably said blower means comprises means for flinging droplets towards said opening means in a manner so that the scrubbing liquid passing through said opening means into said fluid flow inlet means is set into rotary motion within said fluid flow inlet means, whereby an efficient pre-purifying of the fluid flow is obtained in said fluid flow inlet means progressing in the direction opposite -to -the direc-tion of the flow of the gaseous fluid flow -therein.
Desirably said end region of said fluid flow inlet means has a substantially frusto-conical configura-tion taper-ing in the direction towards said scrubber means. More pre-ferably the apparatus comprises means for directing the gaseous fluid flow through said inlet means in a substantially rota-tional rnanner about a vertical axis of said inlet means, and - 3a -I''' .
7Z2~
in which said opening means directs said return flow of the scrubbing liquid in-to said inlet means in a rotational direc-tion substantially the same as -the rotational direction of said gaseous fluid flow.
sy means of -the invention numerous significan-t ad-vantages are gained. By the means of the inven-tion a solution is achieved wherein only the gas which has already been nearly purified is carried to -the final scrubbing together with a minimal scrubbing liquid quantity, with the consequence that the solid matter loading of -the gas is minimal. It is -then possible to manage in the driving of the blower means employed as scrubber means with low mo-tor outputs, without any major amounts of energy, and at -the same -time the mos-t efficient venturi action possible is still attained; in other words, one achieves high scrubbing efficiency and high veloci--ties oE the gaseous fluid Elow, up to 60-100 m/s for ins-tance.
In the subsequent droplet separation -the veloci-ty of the gaseous Eluid flow is reduced enough to make the liquid drople-ts separate and to enable them to run along -the walls of the frame s-tructure and down to the bottom, and further through aper-tures in the inlet connector into the inlet connector for pre-purification of the gaseous fluid flow. In the design of the invention in fact an energy consumption figure as low as 1 HP
per 1000 m3/hr of gaseous fluid flow to be washed is achieved.
The external disposable subatmospheric pressure will be abou-t 2000 Pa, -that is, the efficiency of -the blower means is about 74%.
The present invention will be described in detail wi-th reference to a preferred embodiment of the invention, depicted in ?s~ - 3b -7~
the accompanying drawing, in which:-The single Figure is a schematic elevational view of an advantageous embodiment of the apparatus of the inven-tion.
In the Figure, the apparatus of the invention which in general is indicated by the reference numeral 10 comprises a frame s-tructure 11,12, a fluid flow inlet con-nec-tor 13, a scrubber means 15 disposed within the frame structure 11,12, an exit connector 14 for carrying off the purified fluid flow, and a connector 20 for introducing scrubbing liquid in-to the apparatus 10 and for contac-ting it wi-th the fluid flow. In this embodiment, the gaseous fluid flow has been disposed to flow through a pre-treatmen-t section 19 i.nto the inlet connec-tor 13, whereby when flowing into the means 10 -the gaseous fluid flow is already pre-puriEied. The pretreatment sec-tion 19 may consist e.g. of a cyclone separa-tor or a scrubbing tube or another equivalent construction known in itself in the art Erom which the gaseous fluid flow together with its non-abrasive impuri-ties is conducted in a rotary motion about a vertical axis into the inlet connector 13.
In this embodiment a blower means is used as scrubber rneans 15, this blower means having been arranged to be driven by a mo-tor 16. The impeller of the blower means 15 may be closed or open. In the present embodiment, the impeller has been provided with baffles 17 for directing the gaseous fluid flow along the vane of the blower means 15.
The motor 16 rotating the impeller has in this embodiment been carried on the wall 11 of the frame s-tructure by media-tion of rods 18. Between the rods 18 and the wall 11 ample free space is left, so that the gaseous fluid flow can pass upwardly towards the exit connector 14.
72~
In accordance with the fundamental concept of the invention, the end region 21 adjacent to the scrubber means 15 of the fluid fl.ow inlet connector 13 has a diminishing cross sec-tional diameter to the purpose of accelerating the incoming fluid flow before the fluid flow en-ters -the scrub-ber means 15. According to another important char-I- 4a -~2~7;~
acteristic feature, the inlet connector 13 has been provided with holes 22 adapted to receive the return flow of the scrubblng liquid and to admit it into the inlet connector 13. It should be partic-ularly noted that the holes 22 have been disposed to lie in that area of the inlet connector 13 where no acceleration is applied to the fluid flow.
In this embodiment, the scrubbing liquid inlet connector 20 has been disposed to pass through the wall of the fluid ilow inlet connector 13 and to be directed withln the inlet connector 13 towards its flow orifice pointing to the scrubber means 15.
a,~,c~6r,a,~6~r The mode of operation of the~4~n~ 10 of the invention is as follows. The gaseous fluid flow pre-purified in the pretreatment section 19 passes through the inlet connector 13 in a flow potion rotating about a vertical axis and it is accelerated in the conical section 21 from an initial velocity at point A about 7-12 m/s to 20-25 m/s at the point B. At this point, the scrubbing liquid is introduced through the connector 20 into the gaseous fluid flow, whereafter the blower means 15 accelerates the gaseous fluid flow and the scrubbing liquid from velocity 20-25 m/s at B to 60-100 m/s at C. By this design an extremely high scrubbing efficiency is achieved without need to employ a blower means 15 that would re-quire high motor power. In the droplet separation following after the acceleration, the velocity of the gaseous fluid flow drops so much in the cowl section 11 that the droplets will separate and are enabled ts run down along the wall 11 to the bottom 12 and further through the apertures 22 into the inlet connector 13.
The holes 22 in the inlet connector 13 have been shaped so that they are adapted to direct the scrubbing fluid return flow to rotate within the inlet connector 13 in a rotary motion with the same sense of rotatlon as the gaseous fluld flow progressing ln opposite direction, whereby the scrubbing fluid return flow as it flows downward in the inlet connector 13 passes perpendiculflrly to the upwardly flowing gaseous fluid flow and thus effects the Yost efficient possible prescrubbing of the gaseous fluid flow within the inlet connector 13. The downwardly flowing scrubbing IL-Iuid 7~2~
flows in this embodiment into a preseparatror, whlch possibly also incorporates a liquid collectlon tank.
f DO v~r In the~dQs~ according to the invention, the blower means lS has been advantageously carried out so that the blower means 15 as it accelerates the fluid flow directs part of the purlfied fluid flow as a recycling flow back through the holes 22 in the inlet connec-tor 13 into the inlet connector 13, whereby such a rotating fluid flow drives the liquid droplets flung out by the blower means 15 ahead of itself towards the holes 22 and causes the scrubbing liquid to be put in 2 rotary motion within the inlet connector 13.
In the embodiment depcited ln the figure of the drawing, the end portion 21 adjacent to the scrubber means 15 of the inlet connector 13 is conically tapering.
The means of the invention ls not critical as regards the design selected for the scrubber means 15. Rotary power to the impeller may naturally be provided with an externally placed motor or by belt transmission, or using a hydraulic motor. The motor 16 may also be completely isolated from the gaseous fluid flow by covering it with appropriate protective shields. It is then for instance possible to cool the motor by an external air current. The exit connector 14 may equally be of another kind, and it may if required be provided e.g. with an additional droplet separator in order to ensure the best possible droplet separation. Moreover, the conical portion 21 of the inlet connector 13 may be replaced merely with a constricted aperture, through which the gaseous fluid flow is admitted to flow to the impeller of the blower means 15.
l7
Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Apparatus fox removing gaseous components and/or solid impurities from a gaseous fluid flow, comprising: a frame structure; scrubber means disposed within said frame structure; discharge means through which the purified gaseous fluid flow is discharged from said frame structure; means for introducing scrubbing liquid into said apparatus and directing the scrubbing liquid into contact with said gaseous fluid flow; fluid flow inlet means communicating with said frame structure through which said gaseous fluid flow is introduced into said frame structure towards said scrubber means, said fluid flow inlet means having a region through which the gas-eous fluid flow rate is not accelerated and another region through which the flow rate is not accelerated and another region through which the flow rate of the gaseous fluid flow passing through said inlet means is increased prior to said scrubber means; opening means situated in said inlet means through which a return flow of the scrubbing liquid passes to enter into said inlet means and pass therethrough in opposi-tion to the direction of the gaseous fluid flow, said opening means disposed in said region of said inlet means where the flow rate of the gaseous fluid flow is not accelerated and shaped and disposed to direct the scrubbing liquid return flow in said inlet means in a direction opposite to the direction of gaseous fluid flow and so that the scrubbing liquid return flow is not entrained in the gaseous fluid flow.
2. The apparatus of claim 1, wherein said fluid flow inlet means has a flow discharge orifice directed towards said scrubber means and wherein a discharge end portion of said scrubbing liquid inlet means is disposed within said fluid flow inlet means in the direction of said scrubbing means to direct the scrubbing liquid towards said discharge orifice of said fluid flow inlet means.
3. The apparatus of claim 1, wherein said scrubbing means comprises blower means for further accelerating the al-rady accelerated fluid flow discharge from said fluid flow inlet means and for directing a part of the purified fluid flow in the form of a recirculating flow through said opening means provided in said fluid flow inlet means and into the latter, said blower means being positioned and arranged so as to separate droplets out of said fluid flow.
4. The apparatus of claim 3, wherein said blower means comprises means for flinging droplets towards said open-ing means in a manner so that the scrubbing liquid passing through said opening means into said fluid flow inlet means is set into rotary motion within said fluid flow inlet means, whereby an efficient pre-purifying of the fluid flow is obtained in said fluid flow inlet means progressing in the direction opposite to the direction of the flow of the gaseous fluid flow therein.
5. The apparatus of claim 1, wherein said end region of said fluid flow inlet means has a substantially frusto-conical configuration tapering in the direction towards said scrubber means.
6. The apparatus of claim 1, additionally comprising:
means for directing the gaseous fluid flow through said inlet means in a substantially rotational manner about a vertical axis of said inlet means, and in which said opening means directs said return flow of the scrubbing liquid into said inlet means in a rotational direction substantially the same as the rotational direction of said gaseous fluid flow.
means for directing the gaseous fluid flow through said inlet means in a substantially rotational manner about a vertical axis of said inlet means, and in which said opening means directs said return flow of the scrubbing liquid into said inlet means in a rotational direction substantially the same as the rotational direction of said gaseous fluid flow.
7. An apparatus for removing gaseous components and/or solid impurities present in a gaseous fluid flow, comprising a frame structure, a fluid flow inlet connector, scrubber means disposed within the frame structure, an exit connector for the purified fluid flow, and a scrubb-ing liquid inlet connector, wherein the scrubbing liquid exit return flow, is disposed to pass through the fluid flow inlet connector in an opposite direction with reference to the gaseous fluid flow, the end region adjacent to the scrubber means of the fluid flow inlet connector having a cross-sectional diameter diminishing towards said scrubber means, and said inlet fluid connector having holes to receive and admit into said fluid flow inlet connector the return flow of the scrubbing liquid, said holes being disposed in that region of said fluid flow inlet connector where the flow of the fluid flow is not being accelerated.
8. An apparatus according to claim 7, in which the scrubbing liquid inlet connector is disposed to pass through the wall of the fluid flow connector and to be directed within the fluid flow inlet connector towards the latter's flow orifice pointing to the scrubber means.
9. An apparatus according to claim 7, in which the scrubbing means is a fluid flow accelerating blower means which directs part of the purified fluid flow as a recir-culating flow back, through the said holes into said inlet connector.
10. An apparatus according to claim 7, 8 or 9, in which the fluid flow inlet connector is conically tapering at its end region adjacent to the scrubber means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000409783A CA1207224A (en) | 1982-08-19 | 1982-08-19 | Means for removing gaseous components and/or solid impurities present in a gaseous fluid flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000409783A CA1207224A (en) | 1982-08-19 | 1982-08-19 | Means for removing gaseous components and/or solid impurities present in a gaseous fluid flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1207224A true CA1207224A (en) | 1986-07-08 |
Family
ID=4123443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000409783A Expired CA1207224A (en) | 1982-08-19 | 1982-08-19 | Means for removing gaseous components and/or solid impurities present in a gaseous fluid flow |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1207224A (en) |
-
1982
- 1982-08-19 CA CA000409783A patent/CA1207224A/en not_active Expired
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