CA1104890A - Pipe element for heating surface groups - Google Patents
Pipe element for heating surface groupsInfo
- Publication number
- CA1104890A CA1104890A CA302,075A CA302075A CA1104890A CA 1104890 A CA1104890 A CA 1104890A CA 302075 A CA302075 A CA 302075A CA 1104890 A CA1104890 A CA 1104890A
- Authority
- CA
- Canada
- Prior art keywords
- principal
- pipes
- plane
- collector
- distributor
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/14—Supply mains, e.g. rising mains, down-comers, in connection with water tubes
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G7/00—Cleaning by vibration or pressure waves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The invention relates to tube panels having vertical pipes which are adapted to be cleaned by vibrations. The panels consist of vertical pipes mounted between a lower distributor and an upper collector. Elastic input and output pipes connect the vertical pipes to the distributors and collectors, respect-ively, and these pipes are bent out of plane of the vertical pipes. In this manner, the vertical pipes can he vibrated, the vertical pipes of the panels can extend to the entire height of gas flue, and neither the construction nor the arrange-ment of the other structural elements of the heat exchanger, wherein the vertical pipes are built in, are either complicated or hindered by them.
The invention relates to tube panels having vertical pipes which are adapted to be cleaned by vibrations. The panels consist of vertical pipes mounted between a lower distributor and an upper collector. Elastic input and output pipes connect the vertical pipes to the distributors and collectors, respect-ively, and these pipes are bent out of plane of the vertical pipes. In this manner, the vertical pipes can he vibrated, the vertical pipes of the panels can extend to the entire height of gas flue, and neither the construction nor the arrange-ment of the other structural elements of the heat exchanger, wherein the vertical pipes are built in, are either complicated or hindered by them.
Description
The present invention relates to a tube panel for heating surface groups. More specifically, the invention relates to such a tube panel which is particularly suitable for being used in the gas flue of a heat-exchanger flown through by highly dust-laden gases. The tube panel comprises~ in ess-ence, vertical tubes installed between a slightly sloping or horizontal distrubutor and a collector pipe. The distributor or collector pipes are connected to a principal distributor pipe or principal collector pipe, respectively, by way of elastic connection pipes~ i.e., pipes which are springy and resilient.
In case of heat-exchangers serving for the utilizat-ion of gases containing solids, cleaning of the heat-exchanging surfaces is re~uired during the operation. Beating or shuttle devices, by means of which the pipe elements of a tube panel are brought into vibration in order to make the sticky deposits fall down 7 are frequently used for this purpose. Such apparatus are efficient only when freedom of movement is provided for the pipe elements.
For this reason, the known tube panels have pipe elements consisting of pipes, winded to and fro, which are sus-pended at their upper9 reversing arc so that their lower ends may vibrate freely. Exam~les for these types are given in documents: US-PS 2 183 496, DT-OS 2 036 061, BE-PS 588 672, DT-GM 7 035 269. Tube panels of these types could be used either as an overheater, or the medium taking up the heat must be forced through them. In case of natural or gravitational circulation of the medium taking up the heat, no pipe elements that contain sections with a downward flow can be used.
In order that heat-exchangers with natural circulation could also be used with the utilization of highly dust-laden ::`
,, ' ' ' :
gases, these pipe elements were made of field pipes whose upper ends were rigidly fixed in collector chambers, while -their lower end remained movable so that -the field pipes may be brought into vibration (DT-GM 1 656 591).
However, in heat-exchangers with natural circulation it is tube panels with possibly straight pipes, connected with a lower distributor and an upper collector, that are preferably used since these have various advantages, e.g., in the cir~
culation of the working medium and in production. For example, a tube panel of this kind is shown in DT-PS 1 231 257. If such tube panels were to be used in a heat-exchanger whose heating gases contain solids which would be deposited onto the pipes in the element, one would be forced to apply other methods --more expensive than the vibrating -- for cleaning since these pipe elements are much too rigid to be brought into an efficient vibration without damaging them.
In case of a tube panel of the type mentioned in the introductory part (DT-GM 73 42 927), the elastic connection (springy and resilient) pipes are positioned in the plane of the tube panels. This position is disadvantageous since, to ensure a sufficient elasticity, these connection pipes should have a certain minimum length. If the need in space to fulfill this requirement is sufficiently high, the additional space remains unused since this space should be blocked against the gas flow to force the gases through the pipe elements. A further dis-advantage of positioning the elastic connection pipes in the ! plane of the tube panels results from the fact that the conn-ection pipes are attached close to the one end of the tube panel distribut:or or collector and this makes it difficult to install cooling pipes into the walls of the gas flue.
The scope and aim of -the present invention is to
In case of heat-exchangers serving for the utilizat-ion of gases containing solids, cleaning of the heat-exchanging surfaces is re~uired during the operation. Beating or shuttle devices, by means of which the pipe elements of a tube panel are brought into vibration in order to make the sticky deposits fall down 7 are frequently used for this purpose. Such apparatus are efficient only when freedom of movement is provided for the pipe elements.
For this reason, the known tube panels have pipe elements consisting of pipes, winded to and fro, which are sus-pended at their upper9 reversing arc so that their lower ends may vibrate freely. Exam~les for these types are given in documents: US-PS 2 183 496, DT-OS 2 036 061, BE-PS 588 672, DT-GM 7 035 269. Tube panels of these types could be used either as an overheater, or the medium taking up the heat must be forced through them. In case of natural or gravitational circulation of the medium taking up the heat, no pipe elements that contain sections with a downward flow can be used.
In order that heat-exchangers with natural circulation could also be used with the utilization of highly dust-laden ::`
,, ' ' ' :
gases, these pipe elements were made of field pipes whose upper ends were rigidly fixed in collector chambers, while -their lower end remained movable so that -the field pipes may be brought into vibration (DT-GM 1 656 591).
However, in heat-exchangers with natural circulation it is tube panels with possibly straight pipes, connected with a lower distributor and an upper collector, that are preferably used since these have various advantages, e.g., in the cir~
culation of the working medium and in production. For example, a tube panel of this kind is shown in DT-PS 1 231 257. If such tube panels were to be used in a heat-exchanger whose heating gases contain solids which would be deposited onto the pipes in the element, one would be forced to apply other methods --more expensive than the vibrating -- for cleaning since these pipe elements are much too rigid to be brought into an efficient vibration without damaging them.
In case of a tube panel of the type mentioned in the introductory part (DT-GM 73 42 927), the elastic connection (springy and resilient) pipes are positioned in the plane of the tube panels. This position is disadvantageous since, to ensure a sufficient elasticity, these connection pipes should have a certain minimum length. If the need in space to fulfill this requirement is sufficiently high, the additional space remains unused since this space should be blocked against the gas flow to force the gases through the pipe elements. A further dis-advantage of positioning the elastic connection pipes in the ! plane of the tube panels results from the fact that the conn-ection pipes are attached close to the one end of the tube panel distribut:or or collector and this makes it difficult to install cooling pipes into the walls of the gas flue.
The scope and aim of -the present invention is to
- 2 -' .
create a tube panel which consists of essentially ver-tical pipes installed between a slightly sloping or horizontal dis-tributor and a col.lector, the d:istributor or collector pipes being connected to a principal distributor or principal collect-or by means of elastic connection (springy and resilient) pipes, which element is adapted to be vibrated by means of beating or vibration device to make the deposits on the vertical pipes fall down; which element fully utilizes the space required for the tube panel in the gas flue; and which element does not complicate or hinder either the construction or the arrangement of other structural parts.
With respect to the tube panels of this type, the ojbectives are obtained by bending the connection pipes out of the plane of the tube panels and by connecting them -- out-side this plane --.to a principal distributor or a principal collector, respectively.
In accordanc~ with one emhodiment, a tube panel for heating surface groups, comprising: vertical tubes of said panel mounted between a slightly sloping or horizontal dis-~ 20 tributor pipe and a collector pipe and which is installed inthe gas flue flown-through by gases with particularly high dust content in a heat exchanger, said distributor or connection pipes being connected to a principal distr.ibutor and a prin-~- cipal collector, respectively, by means of elastic connection pipes, characterized in that said connection pipes are ben~ ~
out of the pla:ne of the vertical tubes and are connected to ~ -a principal distributor or principal collector respectively, at a position outside this plane.
` In this manner the stated objectives are obtained, and a specialist may also see further essential characteristics and advantages from the following description of the exemplified
create a tube panel which consists of essentially ver-tical pipes installed between a slightly sloping or horizontal dis-tributor and a col.lector, the d:istributor or collector pipes being connected to a principal distributor or principal collect-or by means of elastic connection (springy and resilient) pipes, which element is adapted to be vibrated by means of beating or vibration device to make the deposits on the vertical pipes fall down; which element fully utilizes the space required for the tube panel in the gas flue; and which element does not complicate or hinder either the construction or the arrangement of other structural parts.
With respect to the tube panels of this type, the ojbectives are obtained by bending the connection pipes out of the plane of the tube panels and by connecting them -- out-side this plane --.to a principal distributor or a principal collector, respectively.
In accordanc~ with one emhodiment, a tube panel for heating surface groups, comprising: vertical tubes of said panel mounted between a slightly sloping or horizontal dis-~ 20 tributor pipe and a collector pipe and which is installed inthe gas flue flown-through by gases with particularly high dust content in a heat exchanger, said distributor or connection pipes being connected to a principal distr.ibutor and a prin-~- cipal collector, respectively, by means of elastic connection pipes, characterized in that said connection pipes are ben~ ~
out of the pla:ne of the vertical tubes and are connected to ~ -a principal distributor or principal collector respectively, at a position outside this plane.
` In this manner the stated objectives are obtained, and a specialist may also see further essential characteristics and advantages from the following description of the exemplified
- 3 -.. . .
.
embodiments of the subject of the invention:
Figure 1 is a longitudinal vertical section through a heat-exchanger (specifically, a steam generator with natural circulation installed to a garbage incinerator), Figure 2 is a cross-section along lines II-II of figure 1, i.e., through the gas flue wherein tube panels in the in-vention are installed, Figure 3 is the schematic drawing of a known tube panel (DT-GM 7~ 4~ 927), Figure 4 is a vertical, longitudinal partial section through the gas flue of the heat-exchanger in Figure 1 with tube panel accord;ng to the invention installed in this gas flue;
Figure 5 is a vertical section along lines V-V through `~ the gas flue in Figure 4, Figure 6 is a section along lines VI-VI in Figure 4, Figure 7 and 8 illustrate ~- similar to Figure 6 --modifications of the subject of the invention.
In figure 1, the steam-generator has a radiation space 1 which the heating gases, generated in the process of burning the garbage, enter in the direction of arrow A. The generator could be equipped with supporting (oil, gas3 combustion means located in space 2 and it further has a gas flue 3 which communicates with the radiation space 1. Gases are flown through the flue in the direction of arrow B~ Overheater sur-faces 4 are installed in the gas flue 3. Tne overheater sur-;~ faces 4 consist of pipes winding to and fro, which pipes are arranged in a way that they can be vibrated in a known manner in ., order to make the deposits on the overheater pipesl which result ; 30 as known from heating-gases of high gas content, fall down.
Steam-generating heating surfaces 5 are installed in the part ,: , , , ~ .
of gas flue 3 at-tached to overheater ~. These surfaces con-sist of tube panel 6, as seen in figure 7.~
As seen in figures ~ and 5, each of these tube panel 6 is formed of vertical pipes 7, of pipes 8 or 9 serving as distirbutors or collectors for these pipes, and of connection pipes 10 or 11 for the principal distributor 12 or principal collector 13, respectively.
Returning to figure 1, principal distributor 12 ls connected to longitudinal distributor 12' which is supplied with water -- via outlet pipe 14 -- from steam condensation drum 15 supplied with a steam/water mixture or steam only, via long-~ itudinal collector 13' or via over supply or overflow pipes.
; Furthermore, the longitudinal distributors are also connected with return pipes 16 supplying the water pre-separated in the upper collector directly, thereby by-passing steam separator drum 15.
In the case of the tube panel, according to the state of art (see Figure 3), the elastic (i.e., springy and resilient) connection pipes (input pipe lOa and output pipe lla) are located in the plane of vertical pipes 7a and of their distri-butors 8a and their collectors 9a. A comparison of Figure 3 ; with Figure 4 and 5 shows that in the case of an equal distance between longitudinal distributors 12' or 12a and longitudinal collectors 13' and 13a, a much smaller heating surface can be placed in a predetermined space designed according to Figure 3 as compared to those in Figures 4 and 5 (design according to the invention). Contrarily, in case of design according to ,, .
the invention, free spaces below distributors 8a and above collectors 9a of the prior art are eliminated, i.e~, the height of the gas flue could be smaller.
As shown in Figure 4, this is obtained by bending the :~ .
~` - 5 --'.
elastic pipes 10, leading to distrihutor 8 of the pipe element, as well as the elastic pipes 11 leading from the collectors 9 of this element, out of the plane of the vertical pipes of the tube panel 7 and of the collectors and distributors 8 and 9 associated with them and by connecting them with the principal distributor 12 and principal collector 13 at a position outside this plane.
Since elastic connec-tions 10 and 11 can be attached to distributor 8 and collector 9 at any position, the pipes 17 in the side walls of the gas flue could be connected vertically to longitudinal distributor 12' or collector 13' which is not possible in case of design according to Figure 3.
As shown in Figure 5, a beating device 18, which is : illustrated only schematically and which may be of any known design, vibrates distributors 8 in order to vibrate pipe elements.
~ From the side of the working medium, principal dis-:` tributor 12 and principal collector 13 are connected to long-itudinal distributors 12' and longitudinal collectors 13' (see Figures 4 - 6). Since from the side of working medium, there are several tube panels connected to the same principal dis-tributor or principal collector, elastic connections 10 or 11 should be of different lengths. As Figures 7 and 8 show, this condition can be avoided by attaching the lower elastic con-nections 1 and of course also the non-visible upper connections ~ 11 directly to longitudinal distributors 12' and longitudinal ; collectors 13'. In the exemplifying embodiment in Figure 7, all tube panels are completely the same whi]e in exemplifying embodiment in Figure 8, the two types of tube panels have conn-ections 10 or 11 bent to the links and to the right side. Both of these exemp:lifying embodiments (figures 7 and 8) give technological advantages.
~ ':
.. . . .
.
embodiments of the subject of the invention:
Figure 1 is a longitudinal vertical section through a heat-exchanger (specifically, a steam generator with natural circulation installed to a garbage incinerator), Figure 2 is a cross-section along lines II-II of figure 1, i.e., through the gas flue wherein tube panels in the in-vention are installed, Figure 3 is the schematic drawing of a known tube panel (DT-GM 7~ 4~ 927), Figure 4 is a vertical, longitudinal partial section through the gas flue of the heat-exchanger in Figure 1 with tube panel accord;ng to the invention installed in this gas flue;
Figure 5 is a vertical section along lines V-V through `~ the gas flue in Figure 4, Figure 6 is a section along lines VI-VI in Figure 4, Figure 7 and 8 illustrate ~- similar to Figure 6 --modifications of the subject of the invention.
In figure 1, the steam-generator has a radiation space 1 which the heating gases, generated in the process of burning the garbage, enter in the direction of arrow A. The generator could be equipped with supporting (oil, gas3 combustion means located in space 2 and it further has a gas flue 3 which communicates with the radiation space 1. Gases are flown through the flue in the direction of arrow B~ Overheater sur-faces 4 are installed in the gas flue 3. Tne overheater sur-;~ faces 4 consist of pipes winding to and fro, which pipes are arranged in a way that they can be vibrated in a known manner in ., order to make the deposits on the overheater pipesl which result ; 30 as known from heating-gases of high gas content, fall down.
Steam-generating heating surfaces 5 are installed in the part ,: , , , ~ .
of gas flue 3 at-tached to overheater ~. These surfaces con-sist of tube panel 6, as seen in figure 7.~
As seen in figures ~ and 5, each of these tube panel 6 is formed of vertical pipes 7, of pipes 8 or 9 serving as distirbutors or collectors for these pipes, and of connection pipes 10 or 11 for the principal distributor 12 or principal collector 13, respectively.
Returning to figure 1, principal distributor 12 ls connected to longitudinal distributor 12' which is supplied with water -- via outlet pipe 14 -- from steam condensation drum 15 supplied with a steam/water mixture or steam only, via long-~ itudinal collector 13' or via over supply or overflow pipes.
; Furthermore, the longitudinal distributors are also connected with return pipes 16 supplying the water pre-separated in the upper collector directly, thereby by-passing steam separator drum 15.
In the case of the tube panel, according to the state of art (see Figure 3), the elastic (i.e., springy and resilient) connection pipes (input pipe lOa and output pipe lla) are located in the plane of vertical pipes 7a and of their distri-butors 8a and their collectors 9a. A comparison of Figure 3 ; with Figure 4 and 5 shows that in the case of an equal distance between longitudinal distributors 12' or 12a and longitudinal collectors 13' and 13a, a much smaller heating surface can be placed in a predetermined space designed according to Figure 3 as compared to those in Figures 4 and 5 (design according to the invention). Contrarily, in case of design according to ,, .
the invention, free spaces below distributors 8a and above collectors 9a of the prior art are eliminated, i.e~, the height of the gas flue could be smaller.
As shown in Figure 4, this is obtained by bending the :~ .
~` - 5 --'.
elastic pipes 10, leading to distrihutor 8 of the pipe element, as well as the elastic pipes 11 leading from the collectors 9 of this element, out of the plane of the vertical pipes of the tube panel 7 and of the collectors and distributors 8 and 9 associated with them and by connecting them with the principal distributor 12 and principal collector 13 at a position outside this plane.
Since elastic connec-tions 10 and 11 can be attached to distributor 8 and collector 9 at any position, the pipes 17 in the side walls of the gas flue could be connected vertically to longitudinal distributor 12' or collector 13' which is not possible in case of design according to Figure 3.
As shown in Figure 5, a beating device 18, which is : illustrated only schematically and which may be of any known design, vibrates distributors 8 in order to vibrate pipe elements.
~ From the side of the working medium, principal dis-:` tributor 12 and principal collector 13 are connected to long-itudinal distributors 12' and longitudinal collectors 13' (see Figures 4 - 6). Since from the side of working medium, there are several tube panels connected to the same principal dis-tributor or principal collector, elastic connections 10 or 11 should be of different lengths. As Figures 7 and 8 show, this condition can be avoided by attaching the lower elastic con-nections 1 and of course also the non-visible upper connections ~ 11 directly to longitudinal distributors 12' and longitudinal ; collectors 13'. In the exemplifying embodiment in Figure 7, all tube panels are completely the same whi]e in exemplifying embodiment in Figure 8, the two types of tube panels have conn-ections 10 or 11 bent to the links and to the right side. Both of these exemp:lifying embodiments (figures 7 and 8) give technological advantages.
~ ':
.. . . .
Claims (4)
1. A standing tube panel for heating surface groups, comprising: vertical tubes of said panel mounted between a slightly sloping or horizontal lower distributor pipe and an upper collector pipe and which is installed in the gas flue flown-through by gases with particularly high dust content in a heat exchanger, said distributor and collector pipes being connected to a principal distributor and a principal collector, respectively, by means of elastic connection pipes, the principal distributor and principal collector, respectively, being arranged at bottom and top levels, res-pectively, of the standing tube panel characterized in that said connection pipes are bent out of the plane of the vertical tubes and are connected to the principal distributor and principal collector, respectively, at a position outside this plane.
2. A tube panel as defined in claim 1 and further characterized in that the elastic connection pipes are in-stalled at right angles to the plane of the vertical tubes and that they are attached to said principal distributor or principal collector which are positioned parallel to the plane of the vertical tubes.
3. A tube panel as defined in claim 1 and further characterized in that the elastic connection pipes are posi-tioned at an oblique angle to the plane of the vertical tubes and are connected to said principal distributor or principal collector, respectively, at right angles to the plane of the tube panel.
4, A tube panel as defined in any one of the claims 1, 2 or 3 further characterized in that elastic connection pipes are connected to the distributors and collectors of the vertical tubes and that the section of the elastic connection which is positioned in the plane of the vertical pipes is several times shorter than the section of the connection, bent out of the plane of the vertical tubes, which leads to the principal distributors or collectors, respectively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19777713989 DE7713989U (en) | 1977-04-28 | Pipe element that can be cleaned by vibration | |
| DEG7713989.0 | 1977-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1104890A true CA1104890A (en) | 1981-07-14 |
Family
ID=6678431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA302,075A Expired CA1104890A (en) | 1977-04-28 | 1978-04-26 | Pipe element for heating surface groups |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1104890A (en) |
| CH (1) | CH628729A5 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3226483A1 (en) * | 1982-07-15 | 1984-01-19 | Erk Eckrohrkessel Gmbh, 1000 Berlin | Support of vibratable heating-surface elements |
| DE4121815C2 (en) * | 1991-07-02 | 1993-11-11 | Schmidt Sche Heissdampf | Heat exchanger |
| US5553571A (en) * | 1994-12-07 | 1996-09-10 | Foster Wheeler Energy Corporation | Rappable steam generator tube bank |
-
1978
- 1978-04-26 CA CA302,075A patent/CA1104890A/en not_active Expired
- 1978-04-27 CH CH459378A patent/CH628729A5/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CH628729A5 (en) | 1982-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |