US1919416A - Evacuation of condensate - Google Patents
Evacuation of condensate Download PDFInfo
- Publication number
- US1919416A US1919416A US565032A US56503231A US1919416A US 1919416 A US1919416 A US 1919416A US 565032 A US565032 A US 565032A US 56503231 A US56503231 A US 56503231A US 1919416 A US1919416 A US 1919416A
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- Prior art keywords
- pipe
- cylinder
- water
- steam
- wall
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- 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.)
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/10—Removing condensate from the interior of the cylinders
Definitions
- Fig. 2 is a section on the line 22 1 on an enlarged scale
- Fig. 3 is a bottom plan view of the end of the eduction pipe as seen from line 33 of Fig. 1;
- Fig. i is a fragmentary enlarged view of the end of the pipe as seen in Fig. 1.
- a drier roll 5 adapted to turn on the bearings 7 and having extending into one of these bearings a pipe ,9 for admitting steam to the interior of the roll.
- An eduction pipe 11 extends through the bearing and may extend curvilinearly in a substantially radial plane to present its end in close opposition to the exterior wall of the cylinder near the bot tom.
- the usual means may be provided for adjusting the spacing of the end of the pipe from the interior wall of the roll and for varying the angular position of the pipe.
- Figs. 2, 3 and 4 I have there shown the wall of the pipe 11 cut away laterally at one side to provide a recess at 13 of small height and facing, as indicated by the arrow in Fig. 4, in a direction opposite to that in which the cylinder rotates and opposed on the further side of the pipe by the interior face 15 of the Wall of the pipe.
- the port defined by this recess is preferably of reduced area as compared with the cross section of the pipe 11 for reasons which will appear.
- I may say that I have had good results with a pipe of about 1 interior diameter'in which the recess was A high and about 1 Wide.
- the open end of the pipe is presented in close opposition to the interior wall of the cylinder and it may conveniently be adjusted into actual contact with the wall so that when the roll is revolved the end of the pipe will gradually grind itself into a fit, leaving open the lateral port at 13.
- I may also provide a cross current longitudinally of the c linder to provide a turbulence adjacent t e pipe and at the mouth of port 13.
- I have shown the interior surface of the cylinder as provided with a thread 21" which serves to feed the water lengthwise thereof and toward that end at which the eduction pipe is placed.
- a thread 21" which serves to feed the water lengthwise thereof and toward that end at which the eduction pipe is placed.
- a thread 21" which serves to feed the water lengthwise thereof and toward that end at which the eduction pipe is placed.
- a thread which need be very slight, may be conveniently cut by the use of a suitable tool during the boring of the cylinder.
- I have found a pitch of perhaps 8" as effective in a paper drying cylinder of a diameter of 5' and an interior length of about 19.
- Water-feeding means of this type will also assist the normal levelling process of the water and resist'the tendency of the 7 water to accumulate at one end of the cylinder to relatively great depth.
- means for evacuating condensate therefrom comprising a relatively stationary eduction pipe having an end closely opposed to the cylinder wall adjacent the bottom thereof and a lateral steam .port of reduced area relative to the section of said pipe located adjacent said end.
- means for evacuating condensate therefrom comprising a relatively stationary eduction pipe having an end closely opposed to the cylinder wall adjacent the bottom thereof and cut away at one side to provide a shallow recess.
- means for evacuating condensate therefrom comprising a relatively stationary eduction pipe having an end closely opposed to the cylinder wall adjacent the bottom thereof and cut away at one side to provide a shallow recess and having flanges defining a passage converging toward said recess.
- means for evacuating condensate therefrom comprising a relatively stationary eduction pipe having its end close: 1y opposed to the cylinder wall adjacent the bottom thereof and having a water inlet and a tapered steam passage providing a throat of restricted capacity through which steam may pass from the interior of the cylinder ice the pipe into contact with water at said in- 5.
- means for evacuating condensate therefrom comprising a relatively stationary eduction pipe having its endspresented in a substantially radial plane in close opposition to the cylinder wall adjacent the bottom thereof and having its wall formed with a shallow recess facing in a direction opposing the motion of the cylinder.
- means for evacuating condensate therefrom comprising a relatively stationary eduction pipe extending into close opposition to the wall of the cylinder adjacent the bottom thereof, the end of the pipe presenting an exposed substantially radial interior wall opposed to the direction of motion of the cylinder and having a reduced port providing for discharge of steam at greatly increased velocity into contact with water surging against said wall, the interior surface of the cylinder being provided with means to feed water longitudinally of the cylinder toward and across the end of the pipe.
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- Drying Of Solid Materials (AREA)
Description
% Hervey a. Crown E. n1 3 N9 E1 M A05 C2 C m. GNe ms H 6 n C- F V E July 25, 1933.
Patented July 25, 1933 UNITED STATES PATENT OFFICE HERVEY G. CRAM, 0F BUOKSPORT, MAINE, ASSIGNOR TO MAINE SEABOARD PAPER COMPANY, OF BUCKSPORT, MAINE, A CORPORATION OF 'MAINE EVAGUATION OF CON DEN SATE Application filed September 25, 1931.
' a construction which will efiect substantially complete evacuation of the water of condensation.
My invention will be well understood from the following description, wherein for convenience I will describe the device specifically as applied to a paper-drying roll, taken in connection with the accompanying drawing, wherein Fig. l is a longitudinal section of the roll with part broken away;
Fig. 2 is a section on the line 22 1 on an enlarged scale;
Fig. 3 is a bottom plan view of the end of the eduction pipe as seen from line 33 of Fig. 1; and
Fig. i is a fragmentary enlarged view of the end of the pipe as seen in Fig. 1.
Referring to the drawing, I have shown in Fig. 1 a drier roll 5 adapted to turn on the bearings 7 and having extending into one of these bearings a pipe ,9 for admitting steam to the interior of the roll. An eduction pipe 11 extends through the bearing and may extend curvilinearly in a substantially radial plane to present its end in close opposition to the exterior wall of the cylinder near the bot tom. The usual means, not herein shown, may be provided for adjusting the spacing of the end of the pipe from the interior wall of the roll and for varying the angular position of the pipe. By the latter reference I refer to the fact that while the pipe extends to the bottom of the cylinder, its end need not be presented in the sixoclock position, but may be displaced to compensate for the displacement due to its inertia when the cylinder is rotated of the water accumulated therein. These eduction pipes in paper mill practice are commonly referred to as siphons, although in present-day practice a substantial differential steam pressure is maintained such that the discharge through the pipe is substantially continuous. In other words, theoretically the steam pressure is such that water is discharged up the pipe at all times unless of Fig.
Serial N 0. 565,032.
and until the level falls below the open end of the pipe.
Hithereto, however, in paper mill practice a body, of Water has remained in the roll equivalent to, say, three inches in depth, although, of course, theend of thepipe has been adjusted closer than three inches to the surface of the roll. Conditions in the interior of the roll are not susceptible to inspection during operation, and while various theories may be advanced I content myself with stating the conditions as theyhave obtained in practice.
The body of water which thus remains in the roll presents a resistance to the turning of the same, the effect of which is particularly felt as the paper making machinery is operated at increased speeds, and the consumption of power necessary to operate the drying roll system has been excessive. By the construction which I am about to describe substantially complete evacuation in the water is effected and the power demand re duced.
Referring now to Figs. 2, 3 and 4, I have there shown the wall of the pipe 11 cut away laterally at one side to provide a recess at 13 of small height and facing, as indicated by the arrow in Fig. 4, in a direction opposite to that in which the cylinder rotates and opposed on the further side of the pipe by the interior face 15 of the Wall of the pipe. The port defined by this recess ispreferably of reduced area as compared with the cross section of the pipe 11 for reasons which will appear. By way of example and without limitation thereto, I may say that I have had good results with a pipe of about 1 interior diameter'in which the recess was A high and about 1 Wide. Preferably means are provided for defining a tapered passage to the port 13 referred to and I have herein shown an overhanging bevelled flange 17 at the top of the recess and flaring flanges 19 at either side thereof. The open end of the pipe is presented in close opposition to the interior wall of the cylinder and it may conveniently be adjusted into actual contact with the wall so that when the roll is revolved the end of the pipe will gradually grind itself into a fit, leaving open the lateral port at 13.
The particular construction illustrated and just described as an illustrative embodiment of the invention in practice will effect a substantially complete evacuation of the water. If port 13 is submerged, the steam pressure is effective to force water out as in the devices of the prior art. My construction presents an advantage, however, in "that the end of the pipe may be adjusted into contact with the bottom of the cylinder without shutting off the discharge and a close adjustment thus provided certainly and without difliculty. Then the port 13 is in part uncovered, evacuation of the water apparently continues and, without limiting myself thereto, I advance the following explanation of the action. In the rotation of the cylinder in the direction of the arrow in Fig. 2 water carried along due to the rotation of the cylinder enters at 13 and will surge against the wall 15 presented substantially directly transversely to the course of its motion and will rebound therefrom, creating a turbulence at the end of the pipe. At the same time steam will escape through the port at 13, which may be more or less closed at the bottom part by the water,
and in passing through this restricted aperture its velocity is greatly increased. The wateriis therefore picked up and carried up the pipe by impulse assisted by the flow of steam inthe same direction. There may also be some condensation of steam as it passes into contact with the water without loss of velocity, and the steam thus condensed carries with it further water by injector ac tion.
I may also provide a cross current longitudinally of the c linder to provide a turbulence adjacent t e pipe and at the mouth of port 13. Herein I have shown the interior surface of the cylinder as provided with a thread 21" which serves to feed the water lengthwise thereof and toward that end at which the eduction pipe is placed. As drier cylinders are bored in'the course of manufacture, such a thread, which need be very slight, may be conveniently cut by the use of a suitable tool during the boring of the cylinder. I have found a pitch of perhaps 8" as effective in a paper drying cylinder of a diameter of 5' and an interior length of about 19. Water-feeding means of this type will also assist the normal levelling process of the water and resist'the tendency of the 7 water to accumulate at one end of the cylinder to relatively great depth.
I am aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive; reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.
I claim:
1. In combination with a rotating steamheated cylinder, means for evacuating condensate therefrom comprising a relatively stationary eduction pipe having an end closely opposed to the cylinder wall adjacent the bottom thereof and a lateral steam .port of reduced area relative to the section of said pipe located adjacent said end.
2. In combination with a rotating steamheated cylinder, means for evacuating condensate therefrom comprising a relatively stationary eduction pipe having an end closely opposed to the cylinder wall adjacent the bottom thereof and cut away at one side to provide a shallow recess.
3. In combination with a rotating steam heated cylinder, means for evacuating condensate therefrom comprising a relatively stationary eduction pipe having an end closely opposed to the cylinder wall adjacent the bottom thereof and cut away at one side to provide a shallow recess and having flanges defining a passage converging toward said recess.
4. In combination with a rotating steamheated cylinder, means for evacuating condensate therefrom comprising a relatively stationary eduction pipe having its end close: 1y opposed to the cylinder wall adjacent the bottom thereof and having a water inlet and a tapered steam passage providing a throat of restricted capacity through which steam may pass from the interior of the cylinder ice the pipe into contact with water at said in- 5. In combination with a rotating steamheated cylinder, means for evacuating condensate therefrom comprising a relatively stationary eduction pipe having its endspresented in a substantially radial plane in close opposition to the cylinder wall adjacent the bottom thereof and having its wall formed with a shallow recess facing in a direction opposing the motion of the cylinder.
6. In combination with a rotating steamheated cylinder, means for evacuating condensate therefrom comprising a relatively stationary eduction pipe extending into close opposition to the wall of the cylinder adjacent the bottom thereof, the end of the pipe presenting an exposed substantially radial interior wall opposed to the direction of motion of the cylinder and having a reduced port providing for discharge of steam at greatly increased velocity into contact with water surging against said wall, the interior surface of the cylinder being provided with means to feed water longitudinally of the cylinder toward and across the end of the pipe.
HERVEY G. CRAM.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US565032A US1919416A (en) | 1931-09-25 | 1931-09-25 | Evacuation of condensate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US565032A US1919416A (en) | 1931-09-25 | 1931-09-25 | Evacuation of condensate |
Publications (1)
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US1919416A true US1919416A (en) | 1933-07-25 |
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US565032A Expired - Lifetime US1919416A (en) | 1931-09-25 | 1931-09-25 | Evacuation of condensate |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE743336C (en) * | 1941-11-20 | 1943-12-23 | Robert Schwanda | Stationary creator for dewatering rotating steam-heated drying cylinders |
US2420824A (en) * | 1944-04-01 | 1947-05-20 | Beloit Iron Works | Fluid removal device for drying drums |
US2521371A (en) * | 1946-05-08 | 1950-09-05 | Beloit Iron Works | Dipper for grooved drier drums |
US3009261A (en) * | 1958-08-28 | 1961-11-21 | Johnson Corp | Syphon pipe shoe |
DE1604939B1 (en) * | 1963-11-06 | 1970-08-20 | Johnson Corp | High-speed drum dryer charged with steam |
US4959893A (en) * | 1989-10-06 | 1990-10-02 | Frank Catallo | Apparatus for a preshrinking arrangement to heat the fabric at a controlled temperature |
US5335427A (en) * | 1990-06-19 | 1994-08-09 | Partio Martti E O | Device for removing liquid from inside a rotating cylinder or roll |
CN107761433A (en) * | 2017-10-24 | 2018-03-06 | 广东银泽金属科技有限公司 | One kind energy-conservation paper grade (stock) drier device |
-
1931
- 1931-09-25 US US565032A patent/US1919416A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE743336C (en) * | 1941-11-20 | 1943-12-23 | Robert Schwanda | Stationary creator for dewatering rotating steam-heated drying cylinders |
US2420824A (en) * | 1944-04-01 | 1947-05-20 | Beloit Iron Works | Fluid removal device for drying drums |
US2521371A (en) * | 1946-05-08 | 1950-09-05 | Beloit Iron Works | Dipper for grooved drier drums |
US3009261A (en) * | 1958-08-28 | 1961-11-21 | Johnson Corp | Syphon pipe shoe |
DE1604939B1 (en) * | 1963-11-06 | 1970-08-20 | Johnson Corp | High-speed drum dryer charged with steam |
US4959893A (en) * | 1989-10-06 | 1990-10-02 | Frank Catallo | Apparatus for a preshrinking arrangement to heat the fabric at a controlled temperature |
US5335427A (en) * | 1990-06-19 | 1994-08-09 | Partio Martti E O | Device for removing liquid from inside a rotating cylinder or roll |
CN107761433A (en) * | 2017-10-24 | 2018-03-06 | 广东银泽金属科技有限公司 | One kind energy-conservation paper grade (stock) drier device |
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