CA1107717A - Rotary heat exchanger - Google Patents
Rotary heat exchangerInfo
- Publication number
- CA1107717A CA1107717A CA293,572A CA293572A CA1107717A CA 1107717 A CA1107717 A CA 1107717A CA 293572 A CA293572 A CA 293572A CA 1107717 A CA1107717 A CA 1107717A
- Authority
- CA
- Canada
- Prior art keywords
- container
- heat exchanger
- heat exchange
- pipes
- liquid
- 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
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A heat exchanger for the heating or cooling of a liquid, in par-ticular of a suspension having a high content of solid particles is provided.
The heat exchanger includes a container having an inlet for the liquid posi-tioned at one end or at one side of the container and an outlet for the liquid positioned one end of the container; at least one substantially horizontal heat exchange unit being rotatably mounted in the container and comprising two end chambers communicating through a plurality of pipes arranged in a generally annular configuration, the container hav-ing, below a horizontal plane through the rotational axis of the heat ex-change unit, a circular cylindrical shape to closely conform to the heat exchange unit; means for feeding a heat exchange fluid through the end cham-bers and the plurality of pipes; a central tube extending concentrically in relation to the rotational axis between the end chambers and being closed-off from them and from the container, the central tube having a dia-meter not less than 40% of the greatest distance between any two pipes of the heat exchange unit measured at right angles to the rotational axis; and the outlet from the container having a lower edge at a level lower than the uppermost portion of the central tube to maintain the uppermost portion above the free surface level of the liquid in the container. In this way a high relative velocity is obtained even between a viscous suspension and the heat exchanger wall, to provide high heat transfer. Moreover, it is easy to clean the heat transfer wall of deposits.
A heat exchanger for the heating or cooling of a liquid, in par-ticular of a suspension having a high content of solid particles is provided.
The heat exchanger includes a container having an inlet for the liquid posi-tioned at one end or at one side of the container and an outlet for the liquid positioned one end of the container; at least one substantially horizontal heat exchange unit being rotatably mounted in the container and comprising two end chambers communicating through a plurality of pipes arranged in a generally annular configuration, the container hav-ing, below a horizontal plane through the rotational axis of the heat ex-change unit, a circular cylindrical shape to closely conform to the heat exchange unit; means for feeding a heat exchange fluid through the end cham-bers and the plurality of pipes; a central tube extending concentrically in relation to the rotational axis between the end chambers and being closed-off from them and from the container, the central tube having a dia-meter not less than 40% of the greatest distance between any two pipes of the heat exchange unit measured at right angles to the rotational axis; and the outlet from the container having a lower edge at a level lower than the uppermost portion of the central tube to maintain the uppermost portion above the free surface level of the liquid in the container. In this way a high relative velocity is obtained even between a viscous suspension and the heat exchanger wall, to provide high heat transfer. Moreover, it is easy to clean the heat transfer wall of deposits.
Description
11~7~7~7 The present invention relates to a heat exchager wherein a liquid, in particular a suspension, is heated or cooled. More particularly, it re-lates to such heat exchanger wherein such suspension is caused to flow through a container in which has been placed a rotatably carried, largely hDrizontal heat exch~nger unit consisting of a pipe set.
Heat exchange between tWD fluids, one of the~ being heated or va-pourised and the other being cooled or condensed, usually takes place in sur-face heat exchangers in which both fluids are caused to flow past a heat transfer wall, which serves tWD purposes, namely the transfer of a heat flow as a consequence of te~perature differences between the fluids, and preven~-ing nixing of the fluids. In order to obtain efficient heat transfer between a fluid in a surface heat exchanger and its heat transfer wall, a relative velocity between wall and fluid is required. This is nornally acoomplished by allowing the fluid to flow through sufficiently narrow closed flow ducts which are confined by the heat transfer wall at least in part. If the fluid is a suspension with a relatively high content of solid particles, it will be viscous, and thus a high input pressure has to be produced by means of a pump in order to transport the suspension through the flow passages will be-oome blocked by the solid material found in suspension. Likewise there is a risk that this material m~y, within a short time, form a deposit or coating on the heat transfer wall, which is detrImental to heat flow.
It is well kncwn that a relative velocity of the suspension with respect to the heat transfer w~ll may also be produced with the aid of a drive to set the heat transfer wall in m~tion within a stationary or slowly flowing suspension. In such case, a pump is not absolutely necessary to transport the suspension through the heat transfer apparatus.
Swedish Patent No. 384 569 discloses a heat exchanger fe~turing a rotatLng hating loop. This loop rotates in a container substan-tially totally filled with the heat-receiving fluid. If this fluid is
Heat exchange between tWD fluids, one of the~ being heated or va-pourised and the other being cooled or condensed, usually takes place in sur-face heat exchangers in which both fluids are caused to flow past a heat transfer wall, which serves tWD purposes, namely the transfer of a heat flow as a consequence of te~perature differences between the fluids, and preven~-ing nixing of the fluids. In order to obtain efficient heat transfer between a fluid in a surface heat exchanger and its heat transfer wall, a relative velocity between wall and fluid is required. This is nornally acoomplished by allowing the fluid to flow through sufficiently narrow closed flow ducts which are confined by the heat transfer wall at least in part. If the fluid is a suspension with a relatively high content of solid particles, it will be viscous, and thus a high input pressure has to be produced by means of a pump in order to transport the suspension through the flow passages will be-oome blocked by the solid material found in suspension. Likewise there is a risk that this material m~y, within a short time, form a deposit or coating on the heat transfer wall, which is detrImental to heat flow.
It is well kncwn that a relative velocity of the suspension with respect to the heat transfer w~ll may also be produced with the aid of a drive to set the heat transfer wall in m~tion within a stationary or slowly flowing suspension. In such case, a pump is not absolutely necessary to transport the suspension through the heat transfer apparatus.
Swedish Patent No. 384 569 discloses a heat exchanger fe~turing a rotatLng hating loop. This loop rotates in a container substan-tially totally filled with the heat-receiving fluid. If this fluid is
- 2 - ~
11~77~
viscous, and if there are several layers of tubes in radial direction in the rotating tube set, the tube set will also tend to impart a rotation to the contents of the container. In tllis manner the relative velocity of the con-tents and the tube set with reference to each other, which is necessary for heat transfer, will be low.
An object then of one aspect of the present invention is to provide a heat exchanger which is fitted with a rotating tube set wherein the rotation of the contents of the container is substantially prevented, so that a high relative velocity is obtair.ed even between a viscous suspension and the heat transfer wall.
An object of another aspect of this inventlon is to provide such a heat exchanger in which the heat transfer wall is essy to clean of deposits.
The heat exchanger of a broad aspect of this invention is based on the principle of providing a central tube which is concentrically disposed in relation to the rotational axis of the heat exchanger unit between the end pieces amoung the heat exchanger tubes, the diameter of the central tube belng not less than 40% of the largest distance between any two heat exchanger tubes, measured at right angles to the rotational axis, and of assuring that at least the lower edge of the outflow from that container in which the heat exchanger unit has been placed is located at a level lower than the topmost part of the central tube, so that the latter can be kept above the free liquid level ln the container.
Thus by a broad aspect of this invention a heat exchanger is prov~ded for the heating or cooling of a liquid, in particular a suspension having a i~77~7 high content of solid particles, comprising: a container, having an inlet for the liquid positioned at one end of the container and an outlet for the liquid at the opposite end of the con~ainer, at least one substantially horizontal heat exchange unit being rotatably mounted in the container and comprising two end chambers communicating through a plur-ality of pipes arranged in a generally annular configuration, the container having, below a horizontal plane through the rotational axis of the heat exchange unit, a circular cylindrical shape to closely confor~ to the heat exchange unit; means for feeding a heat exchange fluid thorugh the end chambers and the plurallty of pipes; a central tube extending concentrically in relation to the rotational axis between the end chambers and being closed-off from them and from the container, the central tube having a diameter not less than 40% of the greatest distance between any two pipes of the heat exchange unit measured at right angles to the rotational axis; and the outlet from the container having a lower edge at a level lower than the uppermost portion above the free surface level of t~e liquid in the container.
By variants thereof, the inlet and the outlet are either at oppo-site ends of the apparatus, or at opposite sides of the apparatus.
sy a variant thereof, the inlet to and the outlet from the container are at opposite sides of the apparatus.
By another variant, the heat transfer fluid is conducted in ana out through one and the same double jacketed hollow shaft at one end of the container.
11~77~
viscous, and if there are several layers of tubes in radial direction in the rotating tube set, the tube set will also tend to impart a rotation to the contents of the container. In tllis manner the relative velocity of the con-tents and the tube set with reference to each other, which is necessary for heat transfer, will be low.
An object then of one aspect of the present invention is to provide a heat exchanger which is fitted with a rotating tube set wherein the rotation of the contents of the container is substantially prevented, so that a high relative velocity is obtair.ed even between a viscous suspension and the heat transfer wall.
An object of another aspect of this inventlon is to provide such a heat exchanger in which the heat transfer wall is essy to clean of deposits.
The heat exchanger of a broad aspect of this invention is based on the principle of providing a central tube which is concentrically disposed in relation to the rotational axis of the heat exchanger unit between the end pieces amoung the heat exchanger tubes, the diameter of the central tube belng not less than 40% of the largest distance between any two heat exchanger tubes, measured at right angles to the rotational axis, and of assuring that at least the lower edge of the outflow from that container in which the heat exchanger unit has been placed is located at a level lower than the topmost part of the central tube, so that the latter can be kept above the free liquid level ln the container.
Thus by a broad aspect of this invention a heat exchanger is prov~ded for the heating or cooling of a liquid, in particular a suspension having a i~77~7 high content of solid particles, comprising: a container, having an inlet for the liquid positioned at one end of the container and an outlet for the liquid at the opposite end of the con~ainer, at least one substantially horizontal heat exchange unit being rotatably mounted in the container and comprising two end chambers communicating through a plur-ality of pipes arranged in a generally annular configuration, the container having, below a horizontal plane through the rotational axis of the heat exchange unit, a circular cylindrical shape to closely confor~ to the heat exchange unit; means for feeding a heat exchange fluid thorugh the end chambers and the plurallty of pipes; a central tube extending concentrically in relation to the rotational axis between the end chambers and being closed-off from them and from the container, the central tube having a diameter not less than 40% of the greatest distance between any two pipes of the heat exchange unit measured at right angles to the rotational axis; and the outlet from the container having a lower edge at a level lower than the uppermost portion above the free surface level of t~e liquid in the container.
By variants thereof, the inlet and the outlet are either at oppo-site ends of the apparatus, or at opposite sides of the apparatus.
sy a variant thereof, the inlet to and the outlet from the container are at opposite sides of the apparatus.
By another variant, the heat transfer fluid is conducted in ana out through one and the same double jacketed hollow shaft at one end of the container.
- 3 a -~77~7 By a further variation, the rotating unit has supporting plates positioned at right angles to the rotatlonal axis and affixed thereto, the supporting plates being adapted to support the heat transfer pipes and at the same time guide the flow of the liquid or suspension present on the out-side of the pipes substantially at right angles to the pipes, the supporting bracing plates having an open portion adapted to allow flow in an axisl direction.
By still another variation, the heat exchanger has a supporting structure adapted to impart an inclination to the heat exchanger such that its rotational axis i9 inclined at such an angle against the horizontal plane that the fluid flowing through the container on the outside of the heat exchange unit is adapted to reach substantially e~ually high up on the ceDtral tube on the length thereof when the heat exchange unit is rotating.
In the accompanying drawings, - .
Fig. 1 illustrates the apparatus of one aspect of this invention in the form of a schematic vertical section carried through the rotational axis of the heat exchanger unit;
Figs. 2 and 3 show the same means, presented in a schematic verti-cal section at right angles to the rotational axis alohg the lines indited by II-II and III-III respectively in Fig. l;
Figs. 4 and 5 show the same section as Fig. 2, with the movement of the suspension in the apparatus indicated in them; and 377~7 Fig. 6 shows the apparatus of ~ig. 1, schematically viewed from akove.
In these figures, 1 is the container through which the suspension is caused to flow with inflow through the input 2 and wqthdrawal by the out-put 3. me container may be open at the top or provided with cover 4. The rotating heat exchanger unit is accomodated within the container, its shaft S on the drive side being carried in the bearing 6 and sealed against the container within the seal 7. On the opFosite side, the heat exchanger unit has a aou~le jacXeted hollow s~l~ft 8, which is carried on the outside of the container in the bearing 9 and which is sealed against the container within ~he seal 10. m e h~llcw .shaft terminates in a double stuffing kox 11, which is connected to the input 12 and output 13 of the heat exchange.
This fluid may be, for . . . - --instance, ccoling water, hot water or condensing steam.
me input 12 and output 13 c~icate by the hollow shaft 8 in open connection each with one of the mutually separated divisions 14 and 15 in an end piece 16. On the drive side of the ap~aratus an e ~ivalent end piece 17 is provided. mese end pieces are connected to an air-filled cen-tral tube 18 disposea concentrically around the rotational axis. On the outside of the central tube a plurality of pipe lines 19 are disposed be-tween the end pieces 16 ~nd 17,which constitute opem ccnnections bet~en the end pieces and the divisions 14, 15 and 20 separated in them by means of partitions, and w~ich arrangement cQmpels any liquid introduced int~ the end piece to flow through serics-connected pipe blmdles of pipe ]ines lg connec-te~ in parallel. In the particular apparatus i5 s}x~wn in Fig. 2, one has four such pipe bundles with 40 pipe lines each. Other numbers of pipe lines and of pipe bundles may also be used. ~ provide bracing of the pipe ]ines 19 which constitute the heat transfer wall, and also to guide the flow course within the apparatus, the apparatus includes hracing plat~s 21 affixed to the central tube 18. m ese plates 21 have cut-outs so as to cause ~ch plate ~77~7 to brace or sup~rt part of the pi~)es 19 and at the same time to leave open another part 22, through which th~ suspension may flow in an axial direction.
~y arranging the cut-outs 22 of different bracing plates to be contiguous with different pipes 19, all these pipes can be braced. In one alternate emkodiment, however, the cut-outs 22 may be omitted.
m e container 1 is cylindrical in its lower part with merely a narrow gap bet~een the outermost of pipes 19 and the container wall~ Upward-ly from the plane of the rotational axis the walls of the container are pre-ferably vertical, so that the rotating part may be lifted out of the contain-0 er if required.m e structure supporting the apparatus has not been depicted In Figs. 1-6. It is of a conventional kind and it is so constructed that the axis of the heat exchanger unit is horizontal or has an inclination so that the end of the apparatus where the input of the suspension is located l~as a higher elevation th~n the outflow end.
m e apparatus operates in a continuous steady state in one of tw~
alternative ways. According to one variant, the heat exchanger unit rotates within the container in a direction such that the pipe lines move upwardly on that side where the input 2 of the suspension is located. This is illus-trated by Fig. 4. Since the output 3 of the suspensicn is located at anelevation lower than the input 2, partly due to its placement in the con-tainer 1 and partly owing to the potential inclination of the apparatus with refexence to the horizontal plane, the suspension will only partially fill the container 1 and there will be a free suspension surface in the appara-tus. This free suspension level will, as a result of the rotation of the heat exch3nger unit adjust itself at a higher level 23 on the suspension in-put side fr~m ~he central tube 18 com~ared wi-th the level 24 on the opposite side. This difference in level pr~duces a flow of suspension at right angles to the pipes 19 and to their ~;rection of motion. The flow in axial direc-~77~7 tion ix adjust~l by ~nc ms o~ the (-llt-outs 22 in the bracing plates 21, and the susp~nsion is witl~rawn, for instance, by free overflow through the out-put 3 at the other ~nd of the appara-tus.
By appropriate choice of the clistances hetween pipes 19 and of the peripheral velocity of the heat exchanger unit, the pressure drop encountered as the suspension flows at right angles to the pipes 19 may be kalanced by the static differential pressure which arises from the differ-ence ~ level between surfaces 23 and 24, in such m~nner that the surface 23 will not rise past t~le highest point 25 of the central tube 18. m e sus-pension is thus substantially prevented frcm rotating along with the heattransfer pipes 19, and one achieves a relative velocity which is necessary for efficient heat transfer, bet~en the heat transfer pipes 19 and the suspension. In addition to this function, the central tube affords the re-quisite rigidity to the rotating part of the apparatus.
The second mode of use or variant is illustrated by Fig. 5.
According to this variant, the heat exchanger unit rotates in such direction within the container that the pipe lines 19 move downwardly on the side where the input 2 of the suspension is located. By effect of the rotation, the free surface of the suspension 23 on the susp~nsion output sicle from the central tube 18 will be at an elevation higher than the free surface 24 on the opposite side. In this case too, it is possibl~ ~y appropriate selec-tion of peripheral velocity of the ~eat exchanyer, to make the surface 23 adjust itself to remain below the highest p)int 25 of the central tube, so that the suspensi-on cannot rotate in the a~paratus with a velccity identical to that Gf the heat exchanger unit. In this a~plication, too, the ~racing plates ~1 substantially prevent free axial flGw of the suspensicn from in-put to output. In an apparat~is with this particular direction of rotation the outp~t r~ay be located Gn th~ same elevational level as the input.
It has b~en assum~d in the preceediny description of th~ operation of aspe~ts of this invention ~lat the inpllt 2 arK1 output 3 of the sus~nsion 1~77~7 ~rc flurn~s wi~l a fre~ Æ ~ace. Ii~w~ver, ~he input and output ~y equally be closæ pipelines, in which comlection modified places of connection and which E~ mit the maintaininy of a free liquid level in th~ oontainer are F,ossible without digression from within the scope of the invention.
The apF~lratus may also be used to warm and oool liquids oontaining no solid F~articles. m~ heat trarsfer pipes are easy to clean on the side which is in contact with the susp~nsion, even without any need to empty the aF~paratus, since all heat transfer pip~s can be brought into a position ir.
which they are above the suspension surface.
By still another variation, the heat exchanger has a supporting structure adapted to impart an inclination to the heat exchanger such that its rotational axis i9 inclined at such an angle against the horizontal plane that the fluid flowing through the container on the outside of the heat exchange unit is adapted to reach substantially e~ually high up on the ceDtral tube on the length thereof when the heat exchange unit is rotating.
In the accompanying drawings, - .
Fig. 1 illustrates the apparatus of one aspect of this invention in the form of a schematic vertical section carried through the rotational axis of the heat exchanger unit;
Figs. 2 and 3 show the same means, presented in a schematic verti-cal section at right angles to the rotational axis alohg the lines indited by II-II and III-III respectively in Fig. l;
Figs. 4 and 5 show the same section as Fig. 2, with the movement of the suspension in the apparatus indicated in them; and 377~7 Fig. 6 shows the apparatus of ~ig. 1, schematically viewed from akove.
In these figures, 1 is the container through which the suspension is caused to flow with inflow through the input 2 and wqthdrawal by the out-put 3. me container may be open at the top or provided with cover 4. The rotating heat exchanger unit is accomodated within the container, its shaft S on the drive side being carried in the bearing 6 and sealed against the container within the seal 7. On the opFosite side, the heat exchanger unit has a aou~le jacXeted hollow s~l~ft 8, which is carried on the outside of the container in the bearing 9 and which is sealed against the container within ~he seal 10. m e h~llcw .shaft terminates in a double stuffing kox 11, which is connected to the input 12 and output 13 of the heat exchange.
This fluid may be, for . . . - --instance, ccoling water, hot water or condensing steam.
me input 12 and output 13 c~icate by the hollow shaft 8 in open connection each with one of the mutually separated divisions 14 and 15 in an end piece 16. On the drive side of the ap~aratus an e ~ivalent end piece 17 is provided. mese end pieces are connected to an air-filled cen-tral tube 18 disposea concentrically around the rotational axis. On the outside of the central tube a plurality of pipe lines 19 are disposed be-tween the end pieces 16 ~nd 17,which constitute opem ccnnections bet~en the end pieces and the divisions 14, 15 and 20 separated in them by means of partitions, and w~ich arrangement cQmpels any liquid introduced int~ the end piece to flow through serics-connected pipe blmdles of pipe ]ines lg connec-te~ in parallel. In the particular apparatus i5 s}x~wn in Fig. 2, one has four such pipe bundles with 40 pipe lines each. Other numbers of pipe lines and of pipe bundles may also be used. ~ provide bracing of the pipe ]ines 19 which constitute the heat transfer wall, and also to guide the flow course within the apparatus, the apparatus includes hracing plat~s 21 affixed to the central tube 18. m ese plates 21 have cut-outs so as to cause ~ch plate ~77~7 to brace or sup~rt part of the pi~)es 19 and at the same time to leave open another part 22, through which th~ suspension may flow in an axial direction.
~y arranging the cut-outs 22 of different bracing plates to be contiguous with different pipes 19, all these pipes can be braced. In one alternate emkodiment, however, the cut-outs 22 may be omitted.
m e container 1 is cylindrical in its lower part with merely a narrow gap bet~een the outermost of pipes 19 and the container wall~ Upward-ly from the plane of the rotational axis the walls of the container are pre-ferably vertical, so that the rotating part may be lifted out of the contain-0 er if required.m e structure supporting the apparatus has not been depicted In Figs. 1-6. It is of a conventional kind and it is so constructed that the axis of the heat exchanger unit is horizontal or has an inclination so that the end of the apparatus where the input of the suspension is located l~as a higher elevation th~n the outflow end.
m e apparatus operates in a continuous steady state in one of tw~
alternative ways. According to one variant, the heat exchanger unit rotates within the container in a direction such that the pipe lines move upwardly on that side where the input 2 of the suspension is located. This is illus-trated by Fig. 4. Since the output 3 of the suspensicn is located at anelevation lower than the input 2, partly due to its placement in the con-tainer 1 and partly owing to the potential inclination of the apparatus with refexence to the horizontal plane, the suspension will only partially fill the container 1 and there will be a free suspension surface in the appara-tus. This free suspension level will, as a result of the rotation of the heat exch3nger unit adjust itself at a higher level 23 on the suspension in-put side fr~m ~he central tube 18 com~ared wi-th the level 24 on the opposite side. This difference in level pr~duces a flow of suspension at right angles to the pipes 19 and to their ~;rection of motion. The flow in axial direc-~77~7 tion ix adjust~l by ~nc ms o~ the (-llt-outs 22 in the bracing plates 21, and the susp~nsion is witl~rawn, for instance, by free overflow through the out-put 3 at the other ~nd of the appara-tus.
By appropriate choice of the clistances hetween pipes 19 and of the peripheral velocity of the heat exchanger unit, the pressure drop encountered as the suspension flows at right angles to the pipes 19 may be kalanced by the static differential pressure which arises from the differ-ence ~ level between surfaces 23 and 24, in such m~nner that the surface 23 will not rise past t~le highest point 25 of the central tube 18. m e sus-pension is thus substantially prevented frcm rotating along with the heattransfer pipes 19, and one achieves a relative velocity which is necessary for efficient heat transfer, bet~en the heat transfer pipes 19 and the suspension. In addition to this function, the central tube affords the re-quisite rigidity to the rotating part of the apparatus.
The second mode of use or variant is illustrated by Fig. 5.
According to this variant, the heat exchanger unit rotates in such direction within the container that the pipe lines 19 move downwardly on the side where the input 2 of the suspension is located. By effect of the rotation, the free surface of the suspension 23 on the susp~nsion output sicle from the central tube 18 will be at an elevation higher than the free surface 24 on the opposite side. In this case too, it is possibl~ ~y appropriate selec-tion of peripheral velocity of the ~eat exchanyer, to make the surface 23 adjust itself to remain below the highest p)int 25 of the central tube, so that the suspensi-on cannot rotate in the a~paratus with a velccity identical to that Gf the heat exchanger unit. In this a~plication, too, the ~racing plates ~1 substantially prevent free axial flGw of the suspensicn from in-put to output. In an apparat~is with this particular direction of rotation the outp~t r~ay be located Gn th~ same elevational level as the input.
It has b~en assum~d in the preceediny description of th~ operation of aspe~ts of this invention ~lat the inpllt 2 arK1 output 3 of the sus~nsion 1~77~7 ~rc flurn~s wi~l a fre~ Æ ~ace. Ii~w~ver, ~he input and output ~y equally be closæ pipelines, in which comlection modified places of connection and which E~ mit the maintaininy of a free liquid level in th~ oontainer are F,ossible without digression from within the scope of the invention.
The apF~lratus may also be used to warm and oool liquids oontaining no solid F~articles. m~ heat trarsfer pipes are easy to clean on the side which is in contact with the susp~nsion, even without any need to empty the aF~paratus, since all heat transfer pip~s can be brought into a position ir.
which they are above the suspension surface.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Heat exchanger for the heating or cooling of a liquid, in particular a suspension having a high content of solid particles, compris-ing: a container, having an inlet for said liquid positioned at one end of the container and an outlet for said liquid at the opposite end of said container; at least one substantially horizontal heat exchange unit being rotatably mounted in said container and comprising two end cham-bers communicating through a plurality of pipes arranged in a generally annular configuration, said container having, below a horizontal plane through the rotational axis of said heat exchange unit, a circular cylin-drical shape to closely conform to said heat exchange unit; means for feed-ing a heat exchange fluid through said end chambers and said plurality of pipes; a central tube extending concentrically in relation to said rotation-al axis between said end chambers and being closed-off from them and from said container, said central tube having a diameter not less than 40% of the greatest distance between any two pipes of said heat exchange unit measured at right angles to said rotational axis; and said outlet from said contain-er having a lower edge at a level lower than the uppermost portion of said central tube to maintain said uppermost portion above the free surface level of said liquid in said container.
2. Heat exchanger according to claim 1 wherein said inlet to and said outlet from said container are at opposite sides of the apparatus.
3. Heat exchanger according to claim 1 wherein the heat transfer fluid is conducted in and out through one and the same double jac-keted hollow shaft at one end of the container.
4. Heat exchanger according to claims 1, 2 or 3, wherein said heat exchanger has a supporting structure adapted to impart an inclination to the heat exchanger such that its rotational axis is inclined at such an angle against the horizontal plane that the fluid flowing through said container on the outside of said heat exchange unit is adapted to reach substantially equally high up on said central tube on the length thereof when said heat exchange unit is rotating.
5. Heat exchanger according to claims 1, 2 or 3, wherein said rotating unit has supporting plates positioned at right angles to the rota-tional axis and affixed thereto, said supporting plates being adapted to support said heat transfer pipes, and at the same time guide the flow of said liquid or suspension present on the outside of said pipes substantially at right angles to said pipes, said supporting bracing plates having an open portion adapted to allow flow in an axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA293,572A CA1107717A (en) | 1977-12-21 | 1977-12-21 | Rotary heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA293,572A CA1107717A (en) | 1977-12-21 | 1977-12-21 | Rotary heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1107717A true CA1107717A (en) | 1981-08-25 |
Family
ID=4110346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA293,572A Expired CA1107717A (en) | 1977-12-21 | 1977-12-21 | Rotary heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1107717A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057210A (en) * | 2019-05-13 | 2019-07-26 | 燕河能源技术(北京)股份有限公司 | A kind of sewage source heat exchanger |
-
1977
- 1977-12-21 CA CA293,572A patent/CA1107717A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057210A (en) * | 2019-05-13 | 2019-07-26 | 燕河能源技术(北京)股份有限公司 | A kind of sewage source heat exchanger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI77528C (en) | ANORDNING ATT GENOMFOERA PHYSICAL OCH / ELLER CHEMICAL PROCESSER, I SYNNERHET EN KONTINUERLIGT ARBETANDE VAERMEVAEXLARE. | |
| US4106560A (en) | Falling-film heat exchanger | |
| CN107436101A (en) | Improved suction hood diversion equipment and diversion method for modularization heat exchange columns | |
| NO314290B1 (en) | Horizontal trough and column for contact with gas and liquid | |
| US3219324A (en) | Apparatus for interphase contact between fluids | |
| JPH022611B2 (en) | ||
| US3776456A (en) | Direct fired water heater thermal compensating dip tube | |
| CA1107717A (en) | Rotary heat exchanger | |
| CA1203794A (en) | Method of operating a liquid-liquid heat exchanger | |
| US3650319A (en) | Heat exchange device | |
| US4184540A (en) | Rotary heat exchanger | |
| US4972804A (en) | Method and apparatus for organizing the flow of fluid in a vertical steam generator | |
| US5141047A (en) | Fluidized bed heat exchanger | |
| US3612174A (en) | Apparatus having connecting means between containers for preparing consumer water | |
| US2780078A (en) | Perforated belt evaporative cooler | |
| US2344554A (en) | Deaeration of liquids | |
| GB1600404A (en) | Rotary heat exchangers | |
| DE3467033D1 (en) | Static heat exchanger with high efficiency in particular suitable for the cooling of viscous fluids | |
| US1586816A (en) | Regenerative air or gas preheater | |
| US538556A (en) | theisen | |
| CN205127920U (en) | Novel thick liquid attitude bed reactor | |
| US1275231A (en) | Apparatus for absorbing heat. | |
| US160291A (en) | Improvement in beer-coolers | |
| US3185212A (en) | Fluid heat transfer system | |
| SU882539A1 (en) | Heat mass exchange apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |