CA2096262A1 - Steam coil with impurity diverter - Google Patents
Steam coil with impurity diverterInfo
- Publication number
- CA2096262A1 CA2096262A1 CA002096262A CA2096262A CA2096262A1 CA 2096262 A1 CA2096262 A1 CA 2096262A1 CA 002096262 A CA002096262 A CA 002096262A CA 2096262 A CA2096262 A CA 2096262A CA 2096262 A1 CA2096262 A1 CA 2096262A1
- Authority
- CA
- Canada
- Prior art keywords
- heat exchanger
- steam
- tube
- bottom end
- header
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
- F28F9/0273—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple holes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A pulp drier steam heat exchanger has an inlet header extending along a first side and a condensate header extending along a second side. Heat exchanger tubes extend between and communicate with the inlet header and the condensate header. A plurality of spaced-apart fins extend about the tubes. A diverter for impurities in the steam includes a conduit connected to the inlet header adjacent the bottom of the heatexchanger and extending outwardly therefrom. Preferably the inlet header has an outer tube and an inner tube within the outer tube. There may be a steam distributing tube between the inner tube and the outer tube. The diverter may include a vertical conduit extending downwardly from the bottom of the steam distributing tube and a horizontal conduit extending along the bottom of the heat exchanger.
A pulp drier steam heat exchanger has an inlet header extending along a first side and a condensate header extending along a second side. Heat exchanger tubes extend between and communicate with the inlet header and the condensate header. A plurality of spaced-apart fins extend about the tubes. A diverter for impurities in the steam includes a conduit connected to the inlet header adjacent the bottom of the heatexchanger and extending outwardly therefrom. Preferably the inlet header has an outer tube and an inner tube within the outer tube. There may be a steam distributing tube between the inner tube and the outer tube. The diverter may include a vertical conduit extending downwardly from the bottom of the steam distributing tube and a horizontal conduit extending along the bottom of the heat exchanger.
Description
:` 20962~2 STEAM COIL WITH IMPURITY DIVERTER
BACKGROUND OF THE INVENTION
5 Field of the Invention This invention relates to vertical steam coils used as heat exchangers in pulp driers and diverters for contaminants therein.
10Description of Related Art Steam heat exchangers are used for heating air in airborne pulp driers which aredesigned to convey the pulp by air. The air is heated by blowing it with fans over hot coils and is then directed onto the web of pulp as it passes continuously along a 15 convoluted path through the drier. Large numbers of steam coils are used to heat the air in each drier. Each coil consists of tubes, usually of copper, each tube having a large number of parallel fins, usually of aluminum. The tubes extend between an inlet header and a condensate header. Steam is received in the inlet header, passes through the tubes, and then leaves the coil through the condensate header.
During the chemical processing of pulp, black liquor is formed during the digestion of wood chips. Occasionally a vacuum may form in the steam lines during shutdowns, causing black liquor and possibly even wood chips and other impurities to enter the steam lines. This leads to the possibility of black liquor and other impurities being 25 forced into the steam coils when production resumes. These can cause accelerated corrosion of the tubes of the coils and possibly even internal blockages.
During normal operation of an airborne pulp drier, centrifugal separators are used to separate the steam from impurities such as black liquor. However, when the drier is 30 stairted up, the steam consumption is low and the velocity of steam through the separators is too low to satisfactorily separate non-volatile substances. Therefore coi~taminated steam may get into the coils. Black liquor can condense on the tubes and stays in liquid form. It does not boil away to any large extent. The black liquor ,~. . ~ , -, .
` 2096262
BACKGROUND OF THE INVENTION
5 Field of the Invention This invention relates to vertical steam coils used as heat exchangers in pulp driers and diverters for contaminants therein.
10Description of Related Art Steam heat exchangers are used for heating air in airborne pulp driers which aredesigned to convey the pulp by air. The air is heated by blowing it with fans over hot coils and is then directed onto the web of pulp as it passes continuously along a 15 convoluted path through the drier. Large numbers of steam coils are used to heat the air in each drier. Each coil consists of tubes, usually of copper, each tube having a large number of parallel fins, usually of aluminum. The tubes extend between an inlet header and a condensate header. Steam is received in the inlet header, passes through the tubes, and then leaves the coil through the condensate header.
During the chemical processing of pulp, black liquor is formed during the digestion of wood chips. Occasionally a vacuum may form in the steam lines during shutdowns, causing black liquor and possibly even wood chips and other impurities to enter the steam lines. This leads to the possibility of black liquor and other impurities being 25 forced into the steam coils when production resumes. These can cause accelerated corrosion of the tubes of the coils and possibly even internal blockages.
During normal operation of an airborne pulp drier, centrifugal separators are used to separate the steam from impurities such as black liquor. However, when the drier is 30 stairted up, the steam consumption is low and the velocity of steam through the separators is too low to satisfactorily separate non-volatile substances. Therefore coi~taminated steam may get into the coils. Black liquor can condense on the tubes and stays in liquid form. It does not boil away to any large extent. The black liquor ,~. . ~ , -, .
` 2096262
- 2 -remains in a semi-liquid plastic state because the chemicals in solution raise the boiling point beyond the temperature of the steam in the steam coils. Accelerated corrosion results and causes the tubes of the coils to burst.
S Airborne pulp driers have steam coils which are not equipped with steam traps. Traps , require constant pressure to work well and therefore do not perform satisfactorily in airborne dAers because of the wide range of pressures at which such dAers operate.
Steam flow is usually restActed by orifices at the outlets of each coil.
SUMMARY OF THE INVENTION
According to the invention there is provided a pulp dAer steam heat exchanger having a top, a bottom, a first side and a second side. An inlet header extends along the first side from the top to the bottom. A condensate header extends along the second side 15 from the top to the bottom. A plurality of spaced-apart heat exchanger tubes extend between, and communicate with, the inlet header and the condensate header. A plurality of spaced-apart fins extend about each of the tubes. A diverter for impuAties in the steam includes a conduit connected to the inlet header adjacent the bottom of the heat exchanger. The diverter extends outwardly therefrom.
The inlet header may include an outer tube with a top end and a bottom end, and an inner tube, the inner tube being within the outer tube with an annular space therebetween. The inner tube has a top end with means for connecting the inner tube to a source of steam and a bottom end spaced-apart above the bottom end of the outer 25 tube.
,~ , .
Preferably there is a steam distAbuting tube between, and spaced-apart Mdially from, the inner tube and the outer tube. The steam distAbuting tube has a bottom adjacent the bottom end of the outer tube and a top above the bottom end of the inner tube. The 30 steam distAbuting tube may be perforated.
In a preferred form of the invention the diverter includes a vertical conduit extending ( ,~,................................................. . .
:
,.....
x `
-"` 209~2~2
S Airborne pulp driers have steam coils which are not equipped with steam traps. Traps , require constant pressure to work well and therefore do not perform satisfactorily in airborne dAers because of the wide range of pressures at which such dAers operate.
Steam flow is usually restActed by orifices at the outlets of each coil.
SUMMARY OF THE INVENTION
According to the invention there is provided a pulp dAer steam heat exchanger having a top, a bottom, a first side and a second side. An inlet header extends along the first side from the top to the bottom. A condensate header extends along the second side 15 from the top to the bottom. A plurality of spaced-apart heat exchanger tubes extend between, and communicate with, the inlet header and the condensate header. A plurality of spaced-apart fins extend about each of the tubes. A diverter for impuAties in the steam includes a conduit connected to the inlet header adjacent the bottom of the heat exchanger. The diverter extends outwardly therefrom.
The inlet header may include an outer tube with a top end and a bottom end, and an inner tube, the inner tube being within the outer tube with an annular space therebetween. The inner tube has a top end with means for connecting the inner tube to a source of steam and a bottom end spaced-apart above the bottom end of the outer 25 tube.
,~ , .
Preferably there is a steam distAbuting tube between, and spaced-apart Mdially from, the inner tube and the outer tube. The steam distAbuting tube has a bottom adjacent the bottom end of the outer tube and a top above the bottom end of the inner tube. The 30 steam distAbuting tube may be perforated.
In a preferred form of the invention the diverter includes a vertical conduit extending ( ,~,................................................. . .
:
,.....
x `
-"` 209~2~2
- 3 -downwardly from the bottom of the steam distributing tube and a horizontal conduit extending along the bottom of the heat exchanger.
In a more preferred version of the invention, there is an orifice plate between the outlet 5 flange and the mating flange of the condensate piping which is designed to collect the condensate formed in the steam coils. The orifice plate maintains higher pressure in the heat exchangers than in the condensate system.
In one example of the invention the outlet header has a bottom end which is connected 10 to the bottom horizontal conduit of the diverter.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
Fig. 1 is a front elevation of a pulp drier steam heat exchanger according to anembodiment of the invention;
Fig. 2 is a top plan thereof;
Fig. 3 is an enlarged sectional view of the upper portion of the inlet header thereof taken along line 3-3 of Fig. 2;
Fig. 4 is an enlarged sectional view of the bottom portion of the inlet header and diverter 25 thereof;
Fig. 5 is an enlarged sectional view of the top end of the condensate header taken along line 5-5 of Fig. 2;
30 Fig. 6 is an enlarged sectional view of the bottom end of the outlet header and adjacent portion of the diverter;
~,~'' : .
~. ` ` `~;, Fig. 7 is an enlarged top, sectional view of the inlet header and three adjacent steam tubes thereof taken along line 7-7 of Fig. l; and Fig. 8 is a fragmentary elevation of the distributor tube thereof.
S
DESCRIPIION OF THE PREFERRED EMBODIMENTS
Referring to the drawings, these show a pulp drier steam heat exchanger 10 which is known commonly, and subsequently herein, as a steam coil. The coil 10 in this instance is of the vertical header type, having a top 12, a bottom 14, a first side 16 and a second side 18. There is an inlet header 20 which extends along the first side from the top to the bottom of the steam coil. A condensate header 22 extends along the opposite side 18 from the top to the bottom. A plurality of coils 10 are arranged one above the other along headers 20 and 22 in a typical installation. Both the inlet header and condensate 15 header are of copper in this embodiment although steel is a less costly alternative. A
plurality of heat exchanger tubes 24 extend between the inlet header and condensate header in each coil 10. The tubes 24 are arranged in horizontal rows which are spaced-apart between the top 12 and bottom 14 as seen best in Fig. 1. As seen best in Fig. 2 and Fig. 7, each row of tubes includes three spaced-apart tubes which are in parallel in 20 this embodiment. The exact numbers of tubes and the numbers of tubes per row varies , from steam coil to steam coil however.
A plurality of spaced-apart fins 26 extend between the inlet header and condensate header with the tubes fitting tightly through apertures 28 in the fins, shown in Fig. 3, 25 such that the fins extend about the tubes. The structure of the steam coil described above is conventional and therefore is not described in more detail.
Where steam coil 10 departs from the prior art is in the structure of inlet header 20 as ~, well as contaminant diverter 30 connected to the bottom thereto. Whereas a typical inlet 30 header comprises a single piece of copper tubing, inlet header 20 has an outer tube 32 and an inner tube 34 which is inside the outer tube. There is an annular space 36 between the inner tube and the outer tube as best seen in Fig. 3. An annular plug 38 .
is fitted into top end 40 of the outer tube and receives top end 42 of inner tube 34. An elbow 44 has a bottom 46 received inside the annular plug and is connected to a fitting 48 with a flange 50 for connecting the steam coil to a source of steam. Elbow 44 in this example is of the known type made of a tee fitting 49 and a plug 51 which extends 5 coaxially with fitting 48 to reduce corrosion caused by the force of the steam.
As seen best in Fig. 4, inner tube 34 has a bottom end 52 which is near bottom end 54 of outer tube 32, but is spaced-apart above it. The top of the inner tube is connected to the source of steam via the annular plug 38, elbow 44 and fitting 48 as seen in Fig.
10 3. The steam passes downwardly through the inner tube and is discharged at its bottom end 52 into annular space 36.
I
In this embodiment there is a steam distributing tube 56 between the inner tube and outer tube near the bottom ends thereof and radially spaced-apart from both. The steam15 distributing tube has a bottom end 58 which is adjacent the bottom end 54 of the outer tube. Both are connected to a second annular plug 60 which is located within the outer tube near the bottom end thereof. The steam distributing tube has a top end 62 which is above bottom end 52 of the inner tube.
20 In this embodiment the steam distributing tube 56 is perforated by a plurality of spaced-apart apertures 64 shown best in Fig. 4. These apertures are above bottom end 52 of the inner tube. There is an optional rin~ 65 having a plurality of apertures 67 between the inner tube and the steam distributing tube at the top end thereof. It may also be seen , that the heat exchanger tubes 24 are connected to apertures 66 in the outer tube via 25 fittings 68 shown best in Fig. 7.
As described above, there is a contaminant diverter 30 at the bottom of the steam coil.
',! Referring first to Fig. 4, the diverter includes an elbow 70 with a top end 72 connected inside plug 60. The elbow is generally similar to elbow 44 and has a tee fitting 71 with 30 vertical portion 73 and a downward extension 74 having a closed bottom end formed by a plug 76. The vertical portion and downward extension are coaxial with the inlet header and are located at the bottom end thereof. The elbow has an outlet 78 on the side thereof connected to a horizontal conduit 80.
s ,, . ! :,. . .
::, . ,"' '` ,, .
Referring to Fig. 1 and 6, the horizontal conduit 80 extends to bottom end 82 of the condensate header and is connected thereto by means of a fitting 84 having a relatively thick bottom end 86 in this example. Horizontal conduit 80 fits into aperture 88 on one side of the fitting while an extension 90 of the horizontal conduit fits into aperture 92 5 on the opposite side of the fitting. The fitting has a top aperture 94 for receiving bottom end 82 of the condensate header.
There is a flange 96 near end 98 of the conduit which allows the contaminant diverter to be connected to a condensate discharge line (not shown).
In this embodiment there is an orifice plate 100 on the contaminant diverter adjacent end 98 of conduit 90. There is an orifice 102 within the plate.
In operation, flange S0 shown in Fig. 3 is connected to a source of steam. The steam passes through fitting 48 and elbow 44 downwardly through inner tube 34 of the inlet header 20. The stealn discharges at the bottom of the tube as seen by arrows 103 in Fig. 4. Any contaminants in the steam are driven downwardly into elbow 70 of contaminant diverter 30. They flow through horizontal conduit 80 and eventually pass out end 98 of the tube shown in Fig. 6. The orifice plate 100 holds back the steam to 20 maintain higher steam pressure in the coil.
~, The steam from the bottom end 52 of tube 34 passes upwardly between the inner tube and steam distributing tube 56. The apertures 64 in the steam distributing tube and apertures 67 in ring 65 allow the steam to diffuse into annular space 36 between the 25 inner tube and the outer tube so it can pass through apertures 66 and more evenly into heat exchanger tubes 24.
Steam is condensed in the tubes 24 of the coil as heat is transferred to the air through the tubes and fins 26. The condensate flows down through condensate header 22 of30 Figure 1. The condensate and contaminants in horizontal conduit 80 combine with condensate flowing down through condensate header 22.
", ,,.,.,, ..,..*
2~9~62 ;~ - 7 It will be understood by someone skilled in the art that many of the details provided above are by way of example only and are not intended to limit the scope of the invention as set out in the following claims.
In a more preferred version of the invention, there is an orifice plate between the outlet 5 flange and the mating flange of the condensate piping which is designed to collect the condensate formed in the steam coils. The orifice plate maintains higher pressure in the heat exchangers than in the condensate system.
In one example of the invention the outlet header has a bottom end which is connected 10 to the bottom horizontal conduit of the diverter.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
Fig. 1 is a front elevation of a pulp drier steam heat exchanger according to anembodiment of the invention;
Fig. 2 is a top plan thereof;
Fig. 3 is an enlarged sectional view of the upper portion of the inlet header thereof taken along line 3-3 of Fig. 2;
Fig. 4 is an enlarged sectional view of the bottom portion of the inlet header and diverter 25 thereof;
Fig. 5 is an enlarged sectional view of the top end of the condensate header taken along line 5-5 of Fig. 2;
30 Fig. 6 is an enlarged sectional view of the bottom end of the outlet header and adjacent portion of the diverter;
~,~'' : .
~. ` ` `~;, Fig. 7 is an enlarged top, sectional view of the inlet header and three adjacent steam tubes thereof taken along line 7-7 of Fig. l; and Fig. 8 is a fragmentary elevation of the distributor tube thereof.
S
DESCRIPIION OF THE PREFERRED EMBODIMENTS
Referring to the drawings, these show a pulp drier steam heat exchanger 10 which is known commonly, and subsequently herein, as a steam coil. The coil 10 in this instance is of the vertical header type, having a top 12, a bottom 14, a first side 16 and a second side 18. There is an inlet header 20 which extends along the first side from the top to the bottom of the steam coil. A condensate header 22 extends along the opposite side 18 from the top to the bottom. A plurality of coils 10 are arranged one above the other along headers 20 and 22 in a typical installation. Both the inlet header and condensate 15 header are of copper in this embodiment although steel is a less costly alternative. A
plurality of heat exchanger tubes 24 extend between the inlet header and condensate header in each coil 10. The tubes 24 are arranged in horizontal rows which are spaced-apart between the top 12 and bottom 14 as seen best in Fig. 1. As seen best in Fig. 2 and Fig. 7, each row of tubes includes three spaced-apart tubes which are in parallel in 20 this embodiment. The exact numbers of tubes and the numbers of tubes per row varies , from steam coil to steam coil however.
A plurality of spaced-apart fins 26 extend between the inlet header and condensate header with the tubes fitting tightly through apertures 28 in the fins, shown in Fig. 3, 25 such that the fins extend about the tubes. The structure of the steam coil described above is conventional and therefore is not described in more detail.
Where steam coil 10 departs from the prior art is in the structure of inlet header 20 as ~, well as contaminant diverter 30 connected to the bottom thereto. Whereas a typical inlet 30 header comprises a single piece of copper tubing, inlet header 20 has an outer tube 32 and an inner tube 34 which is inside the outer tube. There is an annular space 36 between the inner tube and the outer tube as best seen in Fig. 3. An annular plug 38 .
is fitted into top end 40 of the outer tube and receives top end 42 of inner tube 34. An elbow 44 has a bottom 46 received inside the annular plug and is connected to a fitting 48 with a flange 50 for connecting the steam coil to a source of steam. Elbow 44 in this example is of the known type made of a tee fitting 49 and a plug 51 which extends 5 coaxially with fitting 48 to reduce corrosion caused by the force of the steam.
As seen best in Fig. 4, inner tube 34 has a bottom end 52 which is near bottom end 54 of outer tube 32, but is spaced-apart above it. The top of the inner tube is connected to the source of steam via the annular plug 38, elbow 44 and fitting 48 as seen in Fig.
10 3. The steam passes downwardly through the inner tube and is discharged at its bottom end 52 into annular space 36.
I
In this embodiment there is a steam distributing tube 56 between the inner tube and outer tube near the bottom ends thereof and radially spaced-apart from both. The steam15 distributing tube has a bottom end 58 which is adjacent the bottom end 54 of the outer tube. Both are connected to a second annular plug 60 which is located within the outer tube near the bottom end thereof. The steam distributing tube has a top end 62 which is above bottom end 52 of the inner tube.
20 In this embodiment the steam distributing tube 56 is perforated by a plurality of spaced-apart apertures 64 shown best in Fig. 4. These apertures are above bottom end 52 of the inner tube. There is an optional rin~ 65 having a plurality of apertures 67 between the inner tube and the steam distributing tube at the top end thereof. It may also be seen , that the heat exchanger tubes 24 are connected to apertures 66 in the outer tube via 25 fittings 68 shown best in Fig. 7.
As described above, there is a contaminant diverter 30 at the bottom of the steam coil.
',! Referring first to Fig. 4, the diverter includes an elbow 70 with a top end 72 connected inside plug 60. The elbow is generally similar to elbow 44 and has a tee fitting 71 with 30 vertical portion 73 and a downward extension 74 having a closed bottom end formed by a plug 76. The vertical portion and downward extension are coaxial with the inlet header and are located at the bottom end thereof. The elbow has an outlet 78 on the side thereof connected to a horizontal conduit 80.
s ,, . ! :,. . .
::, . ,"' '` ,, .
Referring to Fig. 1 and 6, the horizontal conduit 80 extends to bottom end 82 of the condensate header and is connected thereto by means of a fitting 84 having a relatively thick bottom end 86 in this example. Horizontal conduit 80 fits into aperture 88 on one side of the fitting while an extension 90 of the horizontal conduit fits into aperture 92 5 on the opposite side of the fitting. The fitting has a top aperture 94 for receiving bottom end 82 of the condensate header.
There is a flange 96 near end 98 of the conduit which allows the contaminant diverter to be connected to a condensate discharge line (not shown).
In this embodiment there is an orifice plate 100 on the contaminant diverter adjacent end 98 of conduit 90. There is an orifice 102 within the plate.
In operation, flange S0 shown in Fig. 3 is connected to a source of steam. The steam passes through fitting 48 and elbow 44 downwardly through inner tube 34 of the inlet header 20. The stealn discharges at the bottom of the tube as seen by arrows 103 in Fig. 4. Any contaminants in the steam are driven downwardly into elbow 70 of contaminant diverter 30. They flow through horizontal conduit 80 and eventually pass out end 98 of the tube shown in Fig. 6. The orifice plate 100 holds back the steam to 20 maintain higher steam pressure in the coil.
~, The steam from the bottom end 52 of tube 34 passes upwardly between the inner tube and steam distributing tube 56. The apertures 64 in the steam distributing tube and apertures 67 in ring 65 allow the steam to diffuse into annular space 36 between the 25 inner tube and the outer tube so it can pass through apertures 66 and more evenly into heat exchanger tubes 24.
Steam is condensed in the tubes 24 of the coil as heat is transferred to the air through the tubes and fins 26. The condensate flows down through condensate header 22 of30 Figure 1. The condensate and contaminants in horizontal conduit 80 combine with condensate flowing down through condensate header 22.
", ,,.,.,, ..,..*
2~9~62 ;~ - 7 It will be understood by someone skilled in the art that many of the details provided above are by way of example only and are not intended to limit the scope of the invention as set out in the following claims.
Claims (11)
1. A pulp drier steam heat exchanger having a top, a bottom, a first side and a second side and comprising:
an inlet header extending along the first side of the heat exchanger from the top to the bottom thereof;
a condensate header extending along the second side of the heat exchanger from the top to the bottom thereof;
a plurality of spaced-apart heat exchanger tubes extending between and communicating with the inlet header and the condensate header;
a plurality of spaced-apart fins extending about each of the tubes; and a diverter for impurities in the steam, including a conduit connected to the inlet header adjacent the bottom of the heat exchanger and extending outwardly therefrom to the condensate header.
an inlet header extending along the first side of the heat exchanger from the top to the bottom thereof;
a condensate header extending along the second side of the heat exchanger from the top to the bottom thereof;
a plurality of spaced-apart heat exchanger tubes extending between and communicating with the inlet header and the condensate header;
a plurality of spaced-apart fins extending about each of the tubes; and a diverter for impurities in the steam, including a conduit connected to the inlet header adjacent the bottom of the heat exchanger and extending outwardly therefrom to the condensate header.
2. A heat exchanger as claimed in claim 1, wherein the inlet header includes an outer tube with a top end and a bottom end and an inner tube, the inner tube being within the outer tube with an annular space being therebetween, the inner tube having a top end with means for connecting the inner tube to a source of steam and a bottom end which is spaced-apart above the bottom end of the outer tube.
3. A heat exchanger as claimed in claim 2, having a steam distributing tube between, and spaced-apart radially from, the inner tube and the outer tube, the steam distributing tube having a bottom end which is adjacent the bottom end of the outer tube and having a top end which is above the bottom end of the inner tube.
4. A heat exchanger as claimed in claim 3, wherein the steam distributing tube is perforated.
5. A heat exchanger as claimed in claim 4, wherein a perforated ring extends between the inner tube and the steam distributing tube adjacent the top of the steam distributing tube.
6. A heat exchanger as claimed in claim 3, wherein the inner tube, the outer tube and the steam distributing tube are concentric.
7. A heat exchanger as claimed in claim 4, wherein the diverter includes a vertical conduit extending downwardly from the bottom of the steam distributing tube and a horizontal conduit extending along the bottom of the heat exchanger.
8. A heat exchanger as claimed in claim 7, wherein the vertical conduit has a bottom extension which extends below the horizontal conduit and has a closed bottom end.
9. A heat exchanger as claimed in claim 7, wherein the horizontal conduit has an outlet at an end thereof opposite the vertical conduit with an orifice therein to maintain steam pressure in the heat exchanger.
10. A heat exchanger as claimed in claim 7, wherein the condensate header has a bottom end which connected to the horizontal conduit of the diverter.
11. A heat exchanger as claimed in claim 9, wherein the condensate header has a bottom end which is connected to the horizontal conduit between the outlet end and the vertical conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002096262A CA2096262A1 (en) | 1993-05-14 | 1993-05-14 | Steam coil with impurity diverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002096262A CA2096262A1 (en) | 1993-05-14 | 1993-05-14 | Steam coil with impurity diverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2096262A1 true CA2096262A1 (en) | 1994-11-15 |
Family
ID=4151647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002096262A Abandoned CA2096262A1 (en) | 1993-05-14 | 1993-05-14 | Steam coil with impurity diverter |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2096262A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5782293A (en) * | 1995-10-11 | 1998-07-21 | Sather; Stanley H. | Heat exchanger for a pulp dryer |
| US5960557A (en) * | 1997-02-11 | 1999-10-05 | Sather; Stanley H. | Piping system and method for pulp dryers |
| US6729386B1 (en) | 2001-01-22 | 2004-05-04 | Stanley H. Sather | Pulp drier coil with improved header |
| EP2784428A1 (en) * | 2013-03-25 | 2014-10-01 | LG Electronics Inc. | Heat exchanger |
| CN113294681A (en) * | 2021-05-13 | 2021-08-24 | 王梦茹 | Low leakage steam pipeline trap |
-
1993
- 1993-05-14 CA CA002096262A patent/CA2096262A1/en not_active Abandoned
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5782293A (en) * | 1995-10-11 | 1998-07-21 | Sather; Stanley H. | Heat exchanger for a pulp dryer |
| US5960557A (en) * | 1997-02-11 | 1999-10-05 | Sather; Stanley H. | Piping system and method for pulp dryers |
| US6729386B1 (en) | 2001-01-22 | 2004-05-04 | Stanley H. Sather | Pulp drier coil with improved header |
| EP2784428A1 (en) * | 2013-03-25 | 2014-10-01 | LG Electronics Inc. | Heat exchanger |
| CN104075496A (en) * | 2013-03-25 | 2014-10-01 | Lg电子株式会社 | Heat exchanger |
| EP2784428B1 (en) | 2013-03-25 | 2019-02-20 | LG Electronics Inc. | Heat exchanger |
| CN113294681A (en) * | 2021-05-13 | 2021-08-24 | 王梦茹 | Low leakage steam pipeline trap |
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| Date | Code | Title | Description |
|---|---|---|---|
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| FZDE | Dead |