CA1259002A - Soot blower - Google Patents
Soot blowerInfo
- Publication number
- CA1259002A CA1259002A CA000466765A CA466765A CA1259002A CA 1259002 A CA1259002 A CA 1259002A CA 000466765 A CA000466765 A CA 000466765A CA 466765 A CA466765 A CA 466765A CA 1259002 A CA1259002 A CA 1259002A
- Authority
- CA
- Canada
- Prior art keywords
- soot blower
- medium
- lance
- compressor
- valve
- 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
- 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
- F28G3/00—Rotary appliances
- F28G3/16—Rotary appliances using jets of fluid for removing debris
Abstract
A B S T R A C T
A soot blower incorporating a lance provided with jets and which passes into a heat exchanger through an opening in its wall, the opening being sealed off by a wall casing. The lance and the wall casing are acted upon by purging and sealing air, which is provided by a compressor arranged on each soot blower.
A soot blower incorporating a lance provided with jets and which passes into a heat exchanger through an opening in its wall, the opening being sealed off by a wall casing. The lance and the wall casing are acted upon by purging and sealing air, which is provided by a compressor arranged on each soot blower.
Description
~zs~o~;~
i SOOT BLOWER
The present invention relates to a soot blower for cleaning the surfaces of a heat exchanger.
In such soot blowers, when not actuated, the corrosive hot gases carrying soot from the combustion of solid, liquid or gaseous fuels come into contact with the soot blower lance and through the blower jet openings in the lance can enter the lance tube, where they cause damage by corrosion or fouling.
To reduce this problem an inert gaseous purging medium, for example, air, is introduced beyond the soot blower valve when the blower is in -operative, with the pressure of the pur~ing medium being greater than that of the combustion gases in the heat exchanger. A stream of the inert purging medium thus passes through the lanc~ into the heat exchanger, and prevents the entry of the agressive gases at the jets. A sealing medium, for example, air, is also blown into the wall casing surrounding the entry point of the lance into the heat exchanger to provide a seal against escape of combustion gas to the environment.
In heat exchangers, particularly those for power station boilers, which are provided with several soot blowers, both the purging air and the sealing air are drawn from a central blower system and distributed to the individual soot blowers. This requires an expensive ducting system. The relatively low pressure level of the central blower frequently makes it necessary to use large-diameter ducts to reduce frictional losses. A special control element is needed ahead of each soot blower to achieve even distribution of the required amounts of air, a difficulty which is compounded by the different frictional losses resulting from the unequal duct lengths to the individual soot blowers. Finally, the connections at the soot blower valve andfor at tha wall casing must be flexible to allow for movement of the soot blower and the efects of expansion.
A further disadvantage of such central air systems, is that very often the purging and sealing air is drawn from a blower which is normally shut down when the heat exchanger is switched off so that the purging and sealing is then no longer present. This means that the stove effect which persists within the hot heat exchanger drives the undesirable combustion gases .
.
oz into the soot blower lance or from the wall opening of the heat exchanger into the environment.
It is a further requirement to many manufacturers and operators of heat exchangers that the quantity of air introduced at each soot blower should be as low as possible and should not exceed a quite low maximum value even in the event of those pressure variations which typically frequently occur on the combustion gas side.
It is an object of the present invention to simplify the known system for supplying a soot blower with pur~ing and sealing media.
Here described in preferred embodiment is apparatus with which it is possible to dispense with the central blower and the expensive air-distribution system, and where the purging and sealing media are generated by a dedicated compressor on each separate soot blower. The compressor and the distribution system are configured so that each soot blower continuously receives the required quantity oE purging and sealing air. 'rhe required coarse adjustments can be undertaken by the manufacturer.
More particularly, in accordance with one aspe~t of the invention there is provided, a soot blower for cleaning heating surfaces of a heat exchanger comprising, a lance, said lance being provided at its front end with jets and at its rear end being connected through a soot blower valve to a feed line for a blowing medium, said lance passing through a wall of the heat exchanger and being sealed by a waLl casing where the lance passes into the heat exchanger, a connector for a purging medium for said lance between the soot blower valve and the jets of said lance, a connector for a sealing medium on said wall casing, an individual system for generatinB and distributing purging medium and sealing medium for said soot blower connected to said respective connectors, and a checX valve between the soot blower valve and said purging medium connector for preventing flow of blowing medium into said generating and distributing system.
~ .
~ ~ . .
1259~
In accordance with a second aspect of the invention there is provided, a soot blower for cleaning heating surfaces of a heat exchanger, comprising, a lance, which passes through the wall of the heat exchanger and is sealed at this point by a wall casing, the lance being provided at its front end with jets and at its rear end being connected through a soot blower valve to a feed line for a blowing medium, and an individual system for generating and distributing at least one medium selected from the group consisting of, a purging medium for said lance, and a sealing medium for said wall casing.
In drawings which illustrate embodiments of the invention;
Figure 1 is a side view of a novel soot blower assembly;
Fieure 2 is a detailed view of portion Y of Figure l;
Figure 3 is a detailed view of portion Z of ~igure 1.
In the drawines, a long tube helical soot blower is shown and with w~ich the invention is described by way of example only. The inventive subject matter also finds use in other types of soot blower.
The soot blower illustrated comprises a lance 1, having jets 2 at its front end. The lance 1 is connected to a drive carriage 4 driven by motor 3, which together with the lance 1, can be moved on a fixed carrier rail 5. The motor 3 also rotates the lance 1 axially so that the jets 2 move along a helical path. The end points of the path for the lance 1 are determined by fixed limiter switches.
The lance 1 can be moved into a heat exchanger through an entry port, the walls of such heat exchanger being defined by a wall tube 6. The entry port is surrounded by a wall casin~ 7 so as to seal it off from the outside atmosphere. When in the withdrawn position, the lance 1 is located with its jets 2 within the wall casing 7.
The sliding lance 1 surrounds a fixed inner tube 8, the rear end of - 2a -'n~ ~
~S900~
which has a connector for a blowing medium, for e~ample, steam. The quantity of blowing medium is controlled by a soot blower valve 9 arranged on the soot blower.
The inner tube 8 also has a connector 10 for a purging medium, for example, air. The purge air connector 10 is arranged above the valve seat of the soot blower valve 9, i.e., in the direction of flow of the blowing mediu~
beyond the soot blower valve 9. The lance 1 is supplied with purging air through the purge air connector 10 and the inner tube 8, and when the apparatus is not in soot blowing mode this purgin~ air e~its through the jets
i SOOT BLOWER
The present invention relates to a soot blower for cleaning the surfaces of a heat exchanger.
In such soot blowers, when not actuated, the corrosive hot gases carrying soot from the combustion of solid, liquid or gaseous fuels come into contact with the soot blower lance and through the blower jet openings in the lance can enter the lance tube, where they cause damage by corrosion or fouling.
To reduce this problem an inert gaseous purging medium, for example, air, is introduced beyond the soot blower valve when the blower is in -operative, with the pressure of the pur~ing medium being greater than that of the combustion gases in the heat exchanger. A stream of the inert purging medium thus passes through the lanc~ into the heat exchanger, and prevents the entry of the agressive gases at the jets. A sealing medium, for example, air, is also blown into the wall casing surrounding the entry point of the lance into the heat exchanger to provide a seal against escape of combustion gas to the environment.
In heat exchangers, particularly those for power station boilers, which are provided with several soot blowers, both the purging air and the sealing air are drawn from a central blower system and distributed to the individual soot blowers. This requires an expensive ducting system. The relatively low pressure level of the central blower frequently makes it necessary to use large-diameter ducts to reduce frictional losses. A special control element is needed ahead of each soot blower to achieve even distribution of the required amounts of air, a difficulty which is compounded by the different frictional losses resulting from the unequal duct lengths to the individual soot blowers. Finally, the connections at the soot blower valve andfor at tha wall casing must be flexible to allow for movement of the soot blower and the efects of expansion.
A further disadvantage of such central air systems, is that very often the purging and sealing air is drawn from a blower which is normally shut down when the heat exchanger is switched off so that the purging and sealing is then no longer present. This means that the stove effect which persists within the hot heat exchanger drives the undesirable combustion gases .
.
oz into the soot blower lance or from the wall opening of the heat exchanger into the environment.
It is a further requirement to many manufacturers and operators of heat exchangers that the quantity of air introduced at each soot blower should be as low as possible and should not exceed a quite low maximum value even in the event of those pressure variations which typically frequently occur on the combustion gas side.
It is an object of the present invention to simplify the known system for supplying a soot blower with pur~ing and sealing media.
Here described in preferred embodiment is apparatus with which it is possible to dispense with the central blower and the expensive air-distribution system, and where the purging and sealing media are generated by a dedicated compressor on each separate soot blower. The compressor and the distribution system are configured so that each soot blower continuously receives the required quantity oE purging and sealing air. 'rhe required coarse adjustments can be undertaken by the manufacturer.
More particularly, in accordance with one aspe~t of the invention there is provided, a soot blower for cleaning heating surfaces of a heat exchanger comprising, a lance, said lance being provided at its front end with jets and at its rear end being connected through a soot blower valve to a feed line for a blowing medium, said lance passing through a wall of the heat exchanger and being sealed by a waLl casing where the lance passes into the heat exchanger, a connector for a purging medium for said lance between the soot blower valve and the jets of said lance, a connector for a sealing medium on said wall casing, an individual system for generatinB and distributing purging medium and sealing medium for said soot blower connected to said respective connectors, and a checX valve between the soot blower valve and said purging medium connector for preventing flow of blowing medium into said generating and distributing system.
~ .
~ ~ . .
1259~
In accordance with a second aspect of the invention there is provided, a soot blower for cleaning heating surfaces of a heat exchanger, comprising, a lance, which passes through the wall of the heat exchanger and is sealed at this point by a wall casing, the lance being provided at its front end with jets and at its rear end being connected through a soot blower valve to a feed line for a blowing medium, and an individual system for generating and distributing at least one medium selected from the group consisting of, a purging medium for said lance, and a sealing medium for said wall casing.
In drawings which illustrate embodiments of the invention;
Figure 1 is a side view of a novel soot blower assembly;
Fieure 2 is a detailed view of portion Y of Figure l;
Figure 3 is a detailed view of portion Z of ~igure 1.
In the drawines, a long tube helical soot blower is shown and with w~ich the invention is described by way of example only. The inventive subject matter also finds use in other types of soot blower.
The soot blower illustrated comprises a lance 1, having jets 2 at its front end. The lance 1 is connected to a drive carriage 4 driven by motor 3, which together with the lance 1, can be moved on a fixed carrier rail 5. The motor 3 also rotates the lance 1 axially so that the jets 2 move along a helical path. The end points of the path for the lance 1 are determined by fixed limiter switches.
The lance 1 can be moved into a heat exchanger through an entry port, the walls of such heat exchanger being defined by a wall tube 6. The entry port is surrounded by a wall casin~ 7 so as to seal it off from the outside atmosphere. When in the withdrawn position, the lance 1 is located with its jets 2 within the wall casing 7.
The sliding lance 1 surrounds a fixed inner tube 8, the rear end of - 2a -'n~ ~
~S900~
which has a connector for a blowing medium, for e~ample, steam. The quantity of blowing medium is controlled by a soot blower valve 9 arranged on the soot blower.
The inner tube 8 also has a connector 10 for a purging medium, for example, air. The purge air connector 10 is arranged above the valve seat of the soot blower valve 9, i.e., in the direction of flow of the blowing mediu~
beyond the soot blower valve 9. The lance 1 is supplied with purging air through the purge air connector 10 and the inner tube 8, and when the apparatus is not in soot blowing mode this purgin~ air e~its through the jets
2. ~ check valve 12 (Fig. 2) is arranged in one of the purge air lines 11 leading to the purge air connector 10, and is so adjusted that the blowing medium cannot pass into the purge air line 11 when the soot blower valve 9 is open.
The wall casing 7 is provided with a connector 13 for a sealing medium, for example, air. The sealing air connector 13 is connected through a fle~ible line 14 with a sealing air line 15 arranged on the soot blower. The pressure of the purging air and of the sealing air is greater than pressure of the gas within the heat exchanger.
~ The purging air and the sealing air are both generated by a dedicated system for the soot blower which comprises, a compressor 16, united with the soot blower as a unit. Electrical connector cable for the drive for the compressor 16 and for the motor 3 of the soot blower drive system runs from a central connector box.
As can be seen in Figures 1 and 2, the compressor 16 is arranged adjacent the soot blower valve 9. An air line 17 is connected to the output of the compressor 16 and passes to a T coupling 18. The sealing air line lS
branches off from the T 18 to the sealing air connector 13 on the wall casing 7 and the purge air line 11 is taken from T 18 to the purge air connector 10.
~ safety valve 19 ~Fi~. 2) is incorporated in the air line 17, the release pressure of which corresponds to the rated pressure of the compressor 16. The desi~n of the compressor 16 is preferably such that its delivery volume is substantially independent of the back pressure on the combustion gas.
Compressors which operate on the positive displacement principle may be used, such as piston or rotary piston compressors. The use of a by-pass compressor is however particularly advanta~eous. This is capable of operation unaffected ..''. ' :
~'~590V~
by back pressure in the pressure range of 0.99 - 1.02 bar, which is that of interest in soot blower applications. The costs of such by-pass blowers are considerably less than those of the previously named compressor types. By using such a compressor configuration, it is possible to ensure that the delivery volumes rise at worst only slightly if the back pressure on the combustion gas is lower than the design point of the compressor 16. This is a considersble advantage over the radial blowers used for known central air systems, such blowers having operating points which are closely dependent on the back pressure existing at the particular time.
A further advantage of the named compressors over conventional radial blowers is that they can operate against relatively high back pressure, so that larger frictional resistances within the soot blower can be overcome.
This allows the use o~ the air introduced into the soot blower to be used both as purging air and as sealing air, in a soot blower of the long tube helical type illustrated, and in which the jets 2 at the ends of the lance 1 are within the wall casing 7 when not in operation. The air which flows from the jets 2 on the one hand, prevents combustion gases entering the soot blower, and on the other, seals the heat exchanger wall. It is thus possible to dispense with the sealing air connector 13 on the wall casing 7. This solution is particularly advantageous, because the fle~ible line 14 necessitated by the movement of the heat exchanger wall can be eliminated.
However, this version can only be used if the back pressure on the combustion gas is low, so that one can accept the fact that no sealin~ air is delivered whilst the soot blower is in the blowing mode. During blowing, the check valve 12 is closed and the compressor 16 is shut down or vents through the safety valve 19. However, for higher back pressures, as is illustrated, separated purge air connectors 10 and sealing air connectors 13 are provided.
In the emoodiment shown in Figure 3, the compressor 16 is arranged directly on the wall casing 7. Thus, the sealin~ air connector 13 is connected rigidly to the wall casing 7. The air blown into the wall casing 7 can serve simultaneously as purging air and sealing air and ensure that the combustion gases cannot escape directly to the environment or enter the soot blower.
If separate supplies of purging air and sealing air are to be provided, then, as is shown in Figure 3, the T-coupling 18 in the air line 17 ~2~90~3~
is provided with Q branch to the purge air line 15. A separate purging air and sealing air supply is also necessary in those types of soot blower in which the jets 2 remain in the heat exchanger when the soot blower is not in operation, i.e., when the soot blower valve 9 is closed. In those types of multi-jet soot blower which remain constantly in the gas flow, a supply of purging air and sealing air can be selected as in each of the versions shown in Figures 2 and 3.
The control for the compressor 16 can be such that the compressor runs continuously, even during soot blower operation with the soot blower vslve l9 open and the check valve 12 closed. Any overpressure is relieved by the safety valve 19. In soot blowers acted upon only by purging air, the control is such, however, that the compressor 16 is shutdown in the soot blower drive mode. Thus the switching for the compressor 16 is effected in accordance with operation of the travel limit switches for the soot blower.
6893-l . ~ .
The wall casing 7 is provided with a connector 13 for a sealing medium, for example, air. The sealing air connector 13 is connected through a fle~ible line 14 with a sealing air line 15 arranged on the soot blower. The pressure of the purging air and of the sealing air is greater than pressure of the gas within the heat exchanger.
~ The purging air and the sealing air are both generated by a dedicated system for the soot blower which comprises, a compressor 16, united with the soot blower as a unit. Electrical connector cable for the drive for the compressor 16 and for the motor 3 of the soot blower drive system runs from a central connector box.
As can be seen in Figures 1 and 2, the compressor 16 is arranged adjacent the soot blower valve 9. An air line 17 is connected to the output of the compressor 16 and passes to a T coupling 18. The sealing air line lS
branches off from the T 18 to the sealing air connector 13 on the wall casing 7 and the purge air line 11 is taken from T 18 to the purge air connector 10.
~ safety valve 19 ~Fi~. 2) is incorporated in the air line 17, the release pressure of which corresponds to the rated pressure of the compressor 16. The desi~n of the compressor 16 is preferably such that its delivery volume is substantially independent of the back pressure on the combustion gas.
Compressors which operate on the positive displacement principle may be used, such as piston or rotary piston compressors. The use of a by-pass compressor is however particularly advanta~eous. This is capable of operation unaffected ..''. ' :
~'~590V~
by back pressure in the pressure range of 0.99 - 1.02 bar, which is that of interest in soot blower applications. The costs of such by-pass blowers are considerably less than those of the previously named compressor types. By using such a compressor configuration, it is possible to ensure that the delivery volumes rise at worst only slightly if the back pressure on the combustion gas is lower than the design point of the compressor 16. This is a considersble advantage over the radial blowers used for known central air systems, such blowers having operating points which are closely dependent on the back pressure existing at the particular time.
A further advantage of the named compressors over conventional radial blowers is that they can operate against relatively high back pressure, so that larger frictional resistances within the soot blower can be overcome.
This allows the use o~ the air introduced into the soot blower to be used both as purging air and as sealing air, in a soot blower of the long tube helical type illustrated, and in which the jets 2 at the ends of the lance 1 are within the wall casing 7 when not in operation. The air which flows from the jets 2 on the one hand, prevents combustion gases entering the soot blower, and on the other, seals the heat exchanger wall. It is thus possible to dispense with the sealing air connector 13 on the wall casing 7. This solution is particularly advantageous, because the fle~ible line 14 necessitated by the movement of the heat exchanger wall can be eliminated.
However, this version can only be used if the back pressure on the combustion gas is low, so that one can accept the fact that no sealin~ air is delivered whilst the soot blower is in the blowing mode. During blowing, the check valve 12 is closed and the compressor 16 is shut down or vents through the safety valve 19. However, for higher back pressures, as is illustrated, separated purge air connectors 10 and sealing air connectors 13 are provided.
In the emoodiment shown in Figure 3, the compressor 16 is arranged directly on the wall casing 7. Thus, the sealin~ air connector 13 is connected rigidly to the wall casing 7. The air blown into the wall casing 7 can serve simultaneously as purging air and sealing air and ensure that the combustion gases cannot escape directly to the environment or enter the soot blower.
If separate supplies of purging air and sealing air are to be provided, then, as is shown in Figure 3, the T-coupling 18 in the air line 17 ~2~90~3~
is provided with Q branch to the purge air line 15. A separate purging air and sealing air supply is also necessary in those types of soot blower in which the jets 2 remain in the heat exchanger when the soot blower is not in operation, i.e., when the soot blower valve 9 is closed. In those types of multi-jet soot blower which remain constantly in the gas flow, a supply of purging air and sealing air can be selected as in each of the versions shown in Figures 2 and 3.
The control for the compressor 16 can be such that the compressor runs continuously, even during soot blower operation with the soot blower vslve l9 open and the check valve 12 closed. Any overpressure is relieved by the safety valve 19. In soot blowers acted upon only by purging air, the control is such, however, that the compressor 16 is shutdown in the soot blower drive mode. Thus the switching for the compressor 16 is effected in accordance with operation of the travel limit switches for the soot blower.
6893-l . ~ .
Claims (13)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A soot blower for cleaning heating surfaces of a heat exchanger comprising, a lance, said lance being provided at its front end with jets and at its rear end being connected through a soot blower valve to a feed line for a blowing medium, said lance passing through a wall of the heat exchanger and being sealed by a wall casing where the lance passes into the heat exchanger, a connector for a purging medium for said lance between the soot blower valve and the jets of said lance, a connector for a sealing medium on said wall casing, a individual system for generating and distributing purging medium and sealing medium for said soot blower connected to said respective connectors, and a check valve between the soot blower valve and said purging medium connector for preventing flow of blowing medium into said generating and distributing system.
2. A soot blower as defined in claim 1, wherein the system comprises a compressor.
3. A soot blower as defined in claim 2, wherein the compressor is in the form of a by-pass compressor.
4. A soot blower as defined in claim 1, characterized in that between the compressor and the connectors for the purging medium and the sealing medium respectively there is a safety valve adjusted to release at the rated pressure of the compressor.
5. A soot blower as defined in claim 1, wherein the compressor is built onto the soot blower and forms a self-contained unit with it.
6. A soot blower as defined in claim 5, wherein the compressor is arranged adjacent the soot blower valve.
7. A soot blower as defined in claim 6, wherein introduction of the purging medium occurs exclusively beyond the soot blower valve.
8. A soot blower as defined in claim 5, wherein the compressor is arranged adjacent the wall casing.
9. A soot blower as defined in claim 8, wherein introduction of the sealing and the purging medium respectively occurs exclusively at the wall casing.
10. A soot blower as defined in claim 1, wherein electrical connector cable for operation of the soot blower and the compressor runs to a central terminal box.
11. A soot blower as defined in claim 1, wherein the compressor is switched off during drive mode of the soot blower and is controlled by switching of soot blower movement limit switches.
12. A soot blower for cleaning heating surfaces of a heat exchanger, comprising, a lance, which passes through the wall of the heat exchanger and is sealed at this point by a wall casing, the lance being provided at its front end with jets and at its rear end being connected through a soot blower valve to a feed line for a blowing medium, and an individual system for generating and distributing at least one medium selected from the group consisting of, a purging medium for said lance, and a sealing medium for said wall casing.
13. A soot blower for cleaning heating surfaces of a heat exchanger comprising: a lance having at its front end jets, said lance having a rear end connected through a soot blower valve to a feed line for a blowing medium, said lance passing through a wall of the heat exchanger and being sealed by a wall casing where the lance passes into the heat exchanger; a first connector for a purging medium for said lance between the soot blower valve and the jets of said lance; a second connector for a sealing medium on said wall casing; a system for generating and distributing purging medium and sealing medium for said soot blower connected to said respective connectors; and check valve means between the soot blower and said purging medium connector for preventing flow of blowing medium into said generating and distributing system, each soot blower having a separate blower for generating and distributing purging medium and sealing medium, said system comprising a compressor; a safety valve between said compressor and the connectors for the purging medium and the sealing medium respectively, said safety valve being adjusted to release at the rated pressure of the compressor; said compressor being mounted onto the soot blower and forming a self-contained unit therewith; said compressor being arranged adjacent the soot blower valve; purging medium occurring exclusively beyond said soot blower valve; said compressor being arranged adjacent the wall casing; said sealing and purging medium being introduced at the wall casing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3343992.3 | 1983-12-06 | ||
| DE19833343992 DE3343992A1 (en) | 1983-12-06 | 1983-12-06 | SUSSBLAESER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1259002A true CA1259002A (en) | 1989-09-05 |
Family
ID=6216125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000466765A Expired CA1259002A (en) | 1983-12-06 | 1984-10-31 | Soot blower |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0148997B1 (en) |
| JP (1) | JPH0686927B2 (en) |
| AT (1) | ATE23630T1 (en) |
| CA (1) | CA1259002A (en) |
| DE (2) | DE3343992A1 (en) |
| IN (1) | IN163540B (en) |
| WO (1) | WO1985002673A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2774107B2 (en) * | 1988-08-09 | 1998-07-09 | バブコツク日立株式会社 | Operating method of short-pull type soot blower |
| DE3910616A1 (en) * | 1989-04-01 | 1990-10-04 | Bergemann Gmbh | SUSSBLAESER |
| CN1131991C (en) * | 1995-05-30 | 2003-12-24 | 克莱德-贝格曼有限公司 | Water jet blast with shortened water lance |
| US5925193A (en) * | 1995-05-30 | 1999-07-20 | Clyde Bergemann Gmbh | Method for cleaning pre-determinable surfaces of a heatable internal chamber and associated water lance blower |
| AU5902496A (en) * | 1995-05-30 | 1996-12-18 | Clyde Bergemann Gmbh | System for driving a water jet blower with a housing for a confining and rinsing medium |
| US6035811A (en) * | 1995-05-30 | 2000-03-14 | Clyde Bergemann Gmbh | Water lance blower positioning system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE543593C (en) * | 1928-10-25 | 1932-02-08 | Henry Thomas Weis | Soot blower |
| GB362450A (en) * | 1930-09-04 | 1931-12-04 | Allan Murray Wilson | Improvements in or relating to the cooling of apparatus for cleaning boiler tubes |
| GB382109A (en) * | 1931-12-03 | 1932-10-20 | Whittemore Hulbert Whittemore | Improvements in boiler cleaners |
| FR1132985A (en) * | 1954-06-25 | 1957-03-19 | Babcock & Wilcox France | Improvements to heat exchanger devices |
| DE1176785B (en) * | 1957-04-20 | 1964-08-27 | Babcock & Wilcox Dampfkessel | Sootblower Sealing |
| US3385605A (en) * | 1966-04-04 | 1968-05-28 | Diamond Power Speciality | Wall box seal assembly |
| JPS4948751A (en) * | 1972-09-11 | 1974-05-11 | ||
| JPS5655155A (en) * | 1979-10-11 | 1981-05-15 | Ikeda Touka Kogyo Kk | Chewing gum |
| JPS5658155A (en) * | 1979-10-15 | 1981-05-21 | Toshiba Corp | Control circuit of tape recorder |
| JPS57189662A (en) * | 1981-05-18 | 1982-11-22 | San Ei Chem Ind Ltd | Improvement of sweeteness of thaumatin |
-
1983
- 1983-12-06 DE DE19833343992 patent/DE3343992A1/en active Granted
-
1984
- 1984-09-01 DE DE8484110433T patent/DE3461338D1/en not_active Expired
- 1984-09-01 AT AT84110433T patent/ATE23630T1/en not_active IP Right Cessation
- 1984-09-01 EP EP84110433A patent/EP0148997B1/en not_active Expired
- 1984-10-31 CA CA000466765A patent/CA1259002A/en not_active Expired
- 1984-12-05 WO PCT/EP1984/000390 patent/WO1985002673A1/en unknown
- 1984-12-05 JP JP60500241A patent/JPH0686927B2/en not_active Expired - Fee Related
-
1985
- 1985-02-21 IN IN148/MAS/85A patent/IN163540B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IN163540B (en) | 1988-10-08 |
| WO1985002673A1 (en) | 1985-06-20 |
| ATE23630T1 (en) | 1986-11-15 |
| DE3343992C2 (en) | 1988-09-29 |
| EP0148997A1 (en) | 1985-07-24 |
| JPS61500628A (en) | 1986-04-03 |
| DE3343992A1 (en) | 1985-06-20 |
| JPH0686927B2 (en) | 1994-11-02 |
| DE3461338D1 (en) | 1987-01-02 |
| EP0148997B1 (en) | 1986-11-12 |
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