WO2012160505A1 - Self-cleaning heat exchanger - Google Patents

Self-cleaning heat exchanger Download PDF

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Publication number
WO2012160505A1
WO2012160505A1 PCT/IB2012/052537 IB2012052537W WO2012160505A1 WO 2012160505 A1 WO2012160505 A1 WO 2012160505A1 IB 2012052537 W IB2012052537 W IB 2012052537W WO 2012160505 A1 WO2012160505 A1 WO 2012160505A1
Authority
WO
WIPO (PCT)
Prior art keywords
tubes
projectiles
heat exchanger
distributor
mouths
Prior art date
Application number
PCT/IB2012/052537
Other languages
French (fr)
Inventor
Michael Watson
Michael John Perry
Original Assignee
Tube Tech International Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tube Tech International Limited filed Critical Tube Tech International Limited
Publication of WO2012160505A1 publication Critical patent/WO2012160505A1/en

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
    • F28G15/00—Details
    • F28G15/08—Locating position of cleaning appliances within conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0322—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid in combination with a plug, e.g. inflatable mole, to isolate a part of the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0323—Arrangements specially designed for simultaneous and parallel cleaning of a plurality of conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/057—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes
    • 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
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies

Definitions

  • the present invention relates to a self-cleaning heat exchanger of the type having a bundle of tubes extending between two headers .
  • a self-cleaning heat exchanger is already known, for example from US 3,021,117.
  • projectiles in the form of "sponge balls" of an appropriate size and made of a suitable material are introduced into the header at one end of the heat exchanger. These projectiles gently scour the surface of the tubes during their single pass from one header to the other.
  • the process liquid in this case water, is passed through a filter which separates the projectiles and recycles them back to the first header.
  • the projectiles are merely introduced into the process liquid in the header and the flow of the process liquid is relied upon to bring the projectiles to the mouths of the tubes and to transport the projectiles through the tubes.
  • a disadvantage of this approach is that there is not a uniform flow of liquid across the tube bundle. Consequently, the projectiles may be concentrated in one region so that those tube are cleaned regularly whereas tubes in other regions will be cleaned less frequently. If too long an interval occurs between cleaning cycles of any tube, a deposit may build up in it and when a projectile is next received in that tube it may encounter too much resistance and become jammed within the tube.
  • the present invention provides a heat exchanger having two headers and a bundle of tubes having inner and outer walls and mouths at their opposite ends opening into the two headers, heat being exchanged in use between a process fluid flowing through the headers and the bundle of tubes and a second fluid contacting the outer walls of the tubes, a distributor mounted within one header to position
  • the distributor includes an arm movably mounted relative to the mouths of the tubes of the bundle that comprises a channel facing the mouths of the tubes, the arm being connected to a supply of projectiles whereby the channel is arranged to contain a full complement of projectiles thereby distributing the projectiles evenly over the mouths of the tubes.
  • the tube bundle is rectangular and the arm of the distributor is slidably mounted for
  • the tube bundle is circular and the arm of the distributor is rotatable about the centre of the tube bundle.
  • the distributor may comprise a plurality of arms, for example four, the projectiles in each arm being centred on different radii from the projectiles in the other arms.
  • the arms are arranged as spokes radiating from a common axis.
  • the projectiles may be supplied to the or each arm through a hub arranged at the axis of rotation of the distributor.
  • the hub may be common to all the arms and may serve to divert the projectiles to whichever arm is not filled with a full complement of projectiles.
  • a heat exchanger 10 comprises a bundle 12 of tubes 14 that extend between two headers, of which only one header 22 is shown in the drawing.
  • Each header defines an enclosed chamber communicating with all the tubes 14 of the bundle 12.
  • the process liquid is introduced into one header and flows through the tubes 14 to the header at the opposite end of the heat exchanger.
  • the process liquid is cooled or heated by exchange of heat through the walls of the tubes 14 with a second fluid in thermal contact with the outer walls of the tubes 14.
  • the second fluid may be air or it may be another liquid flowing through a shell that encases the tube bundle 12.
  • the liquid flowing through the tubes 14 tends to form a deposit on the inner walls of the tubes 14. If allowed to build up, the deposit reduces the efficiency of the heat exchanger because it reduces the diameter of the tubes thus increasing their flow resistance and it reduces the rate of heat transfer through the walls of the tubes. To avoid a build up of deposit, the illustrated
  • embodiment of the invention cleans the tubes periodically by sending a spherical projectile, such a sponge ball, down each tube to scour the inner wall of the tube and wipe away any matter that is beginning to adhere to the inner wall of the tube. If done frequently, say every hour, this wiping action ensures that a deposit is prevented from forming thus rendering the heat exchanger self-cleaning . Hitherto, it has been proposed to introduce the spherical projectile, such a sponge ball, down each tube to scour the inner wall of the tube and wipe away any matter that is beginning to adhere to the inner wall of the tube. If done frequently, say every hour, this wiping action ensures that a deposit is prevented from forming thus rendering the heat exchanger self-cleaning . Hitherto, it has been proposed to introduce the spherical projectile, such a sponge ball, down each tube to scour the inner wall of the tube and wipe away any matter that is beginning to adhere to the inner wall of the tube. If done frequently, say every hour, this wiping action ensures
  • the header 22 comprises a tube plate 24 that seals around the mouths of the tubes 14, a cylindrical sleeve sealed relative to the tube plate 24 and a cover plate 26 closing off the opposite end of the cylindrical sleeve to form a closed chamber.
  • the process fluid is introduced into the chamber through a branch pipe connected to the
  • cylindrical sleeve The cylindrical sleeve and its branch pipe have been omitted from the drawing in order to allow the projectile distributor 20 to be seen more clearly.
  • the projectile distributor 20 comprises a cross 30 having four arms 32 radiating as spokes from a central hub 34.
  • the hub 34 is mounted on the end of a hollow rotatable shaft 36 that it journalled in the cover plate 26.
  • a motor 38 is provided to rotate the shaft 36 and a feeding device 44 feeds projectiles down the shaft 36.
  • the feeding device 44 receives the projectiles from a hopper 42 by way of a supply pipe 40.
  • the projectiles are pushed down the hollow shaft 36 into the hub 34 from where there are diverted to fill channels extending along the lengths of the arms 32.
  • the channels are fully open on their side facing the tube plate 24 so that when a projectile is correctly aligned with one of the tubes 14, that projectile can move freely from the channel into the tube.
  • Each channel is also partially open on the side facing away from the tube plate 24 to allow the process liquid to pass through the channel into the tubes 14 while retaining the projectiles within the channels.
  • the channels normally hold a full complement of projectiles and their relative lengths are selected such that the projectiles in different arms 32 lie on different radii .
  • projectiles are fed via the shaft 36 and the hub to fill the channels in the arms 32 with
  • each bore will align with a projectile of one of the arms 32 during complete revolution of the cross 30 and this ensures that each tube is cleaned by a projectile at least once during each revolution of the hub 34.
  • the hub 34 rotates once every hour, this will also be the minimum frequency with which each tube 14 is cleaned, regardless of its position in the tube bundle 12. If the tubes are each cleaned with this frequency, there will not be sufficient time for a deposit to build up on the inner walls of the tubes 14.
  • the arms may translate on sliders instead of rotating about a fixed axis. Where the arms rotate, they may be connected to an annular channel at their radially outer ends and the projectiles may be loaded into that channel instead of being fed into the hub. In that case, the arms may have stops at their radially inner ends to ensure that the projectiles in the different arms lie at different distances from the rotational axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cleaning In General (AREA)

Abstract

A self-cleaning heat exchanger 10 has a bundle 12 of tubes 14 extending between two headers. A distributor 30 mounted within one header 22 positions projectiles over the mouths of the tubes 14 for the projectiles to be entrained by the process fluid to flow along the tubes so as to scour the inner walls of the tubes. The distributor 30 includes an arm 32 movably mounted relative to the mouths of the tubes 4 of the bundle 12 that defines a channel facing the mouths of the tubes 14. The arm 32 is connected to a supply 42 of projectiles that acts to maintain within the channel a full complement of projectiles.

Description

SELF-CLEANING HEAT EXCHANGER
Field of the Invention The present invention relates to a self-cleaning heat exchanger of the type having a bundle of tubes extending between two headers .
Background of the invention
A self-cleaning heat exchanger is already known, for example from US 3,021,117. To prevent a build-up of fur within the tubes, projectiles in the form of "sponge balls" of an appropriate size and made of a suitable material are introduced into the header at one end of the heat exchanger. These projectiles gently scour the surface of the tubes during their single pass from one header to the other. On leaving the second header, the process liquid, in this case water, is passed through a filter which separates the projectiles and recycles them back to the first header.
In the above proposal, the projectiles are merely introduced into the process liquid in the header and the flow of the process liquid is relied upon to bring the projectiles to the mouths of the tubes and to transport the projectiles through the tubes.
A disadvantage of this approach is that there is not a uniform flow of liquid across the tube bundle. Consequently, the projectiles may be concentrated in one region so that those tube are cleaned regularly whereas tubes in other regions will be cleaned less frequently. If too long an interval occurs between cleaning cycles of any tube, a deposit may build up in it and when a projectile is next received in that tube it may encounter too much resistance and become jammed within the tube. Summary of the invention
With a view to mitigating the foregoing disadvantage, the present invention provides a heat exchanger having two headers and a bundle of tubes having inner and outer walls and mouths at their opposite ends opening into the two headers, heat being exchanged in use between a process fluid flowing through the headers and the bundle of tubes and a second fluid contacting the outer walls of the tubes, a distributor mounted within one header to position
projectiles over the mouths of the tubes whereby the
projectiles are entrained by the process fluid to flow along the tubes so as to scour inner walls of the tubes, wherein the distributor includes an arm movably mounted relative to the mouths of the tubes of the bundle that comprises a channel facing the mouths of the tubes, the arm being connected to a supply of projectiles whereby the channel is arranged to contain a full complement of projectiles thereby distributing the projectiles evenly over the mouths of the tubes.
In some embodiments, the tube bundle is rectangular and the arm of the distributor is slidably mounted for
translation across a tube plate that forms a wall of the header and seals around the mouths of the tubes.
In alternative embodiments, the tube bundle is circular and the arm of the distributor is rotatable about the centre of the tube bundle.
The distributor may comprise a plurality of arms, for example four, the projectiles in each arm being centred on different radii from the projectiles in the other arms. In some embodiments, the arms are arranged as spokes radiating from a common axis. Conveniently, the projectiles may be supplied to the or each arm through a hub arranged at the axis of rotation of the distributor. The hub may be common to all the arms and may serve to divert the projectiles to whichever arm is not filled with a full complement of projectiles.
Brief description of the drawings
The invention will now be described further, by way of example, with reference to the accompanying drawing which is a schematic perspective view of one end of a self-cleaning heat exchanger of the invention.
Detailed description of an embodiment
Referring to the drawing, a heat exchanger 10 comprises a bundle 12 of tubes 14 that extend between two headers, of which only one header 22 is shown in the drawing. Each header defines an enclosed chamber communicating with all the tubes 14 of the bundle 12. The process liquid is introduced into one header and flows through the tubes 14 to the header at the opposite end of the heat exchanger. During its passage through the tubes 14, the process liquid is cooled or heated by exchange of heat through the walls of the tubes 14 with a second fluid in thermal contact with the outer walls of the tubes 14. The second fluid may be air or it may be another liquid flowing through a shell that encases the tube bundle 12.
In use, the liquid flowing through the tubes 14 tends to form a deposit on the inner walls of the tubes 14. If allowed to build up, the deposit reduces the efficiency of the heat exchanger because it reduces the diameter of the tubes thus increasing their flow resistance and it reduces the rate of heat transfer through the walls of the tubes. To avoid a build up of deposit, the illustrated
embodiment of the invention cleans the tubes periodically by sending a spherical projectile, such a sponge ball, down each tube to scour the inner wall of the tube and wipe away any matter that is beginning to adhere to the inner wall of the tube. If done frequently, say every hour, this wiping action ensures that a deposit is prevented from forming thus rendering the heat exchanger self-cleaning . Hitherto, it has been proposed to introduce the
projectiles into one header and to rely on the flow of the process fluid to entrain the projectiles. On reaching the other header, the projectiles are separated from the process liquid using a filter or sieve and recycled back to the first header. However, relying on the flow of the process fluid alone to transport to projectiles through all the tubes did not ensure that all the tubes would be cleaned at regular intervals. To overcome this disadvantage, a projectile distributor
20 is placed in the header 22 at one end of the tube bundle 12. The header 22 comprises a tube plate 24 that seals around the mouths of the tubes 14, a cylindrical sleeve sealed relative to the tube plate 24 and a cover plate 26 closing off the opposite end of the cylindrical sleeve to form a closed chamber. The process fluid is introduced into the chamber through a branch pipe connected to the
cylindrical sleeve. The cylindrical sleeve and its branch pipe have been omitted from the drawing in order to allow the projectile distributor 20 to be seen more clearly.
The projectile distributor 20 comprises a cross 30 having four arms 32 radiating as spokes from a central hub 34. The hub 34 is mounted on the end of a hollow rotatable shaft 36 that it journalled in the cover plate 26. A motor 38 is provided to rotate the shaft 36 and a feeding device 44 feeds projectiles down the shaft 36. The feeding device 44 receives the projectiles from a hopper 42 by way of a supply pipe 40. The projectiles are pushed down the hollow shaft 36 into the hub 34 from where there are diverted to fill channels extending along the lengths of the arms 32. The channels are fully open on their side facing the tube plate 24 so that when a projectile is correctly aligned with one of the tubes 14, that projectile can move freely from the channel into the tube. Each channel is also partially open on the side facing away from the tube plate 24 to allow the process liquid to pass through the channel into the tubes 14 while retaining the projectiles within the channels.
The channels normally hold a full complement of projectiles and their relative lengths are selected such that the projectiles in different arms 32 lie on different radii .
In operation, projectiles are fed via the shaft 36 and the hub to fill the channels in the arms 32 with
projectiles. The cross 34 is then rotated by the motor fairly slowly, each full revolution taking approximately one hour. When a projectile in one of the arms 32 is correctly aligned with one of the tubes 14, the flow of process liquid will entrain that projectile so that it passes with the process liquid down the length of the tube and scours and/or wipes the tube to remove any deposit adhering to the tube. The projectile on reaching the other header is separated from the process liquid and may be recycled back to the hopper 42.
As the projectiles in the four arms 32 all lie at different distances from the axis of the hub 34, each bore will align with a projectile of one of the arms 32 during complete revolution of the cross 30 and this ensures that each tube is cleaned by a projectile at least once during each revolution of the hub 34. As the hub 34 rotates once every hour, this will also be the minimum frequency with which each tube 14 is cleaned, regardless of its position in the tube bundle 12. If the tubes are each cleaned with this frequency, there will not be sufficient time for a deposit to build up on the inner walls of the tubes 14.
It will be appreciated that various changes may be made to the illustrated embodiment of the invention without departing from the scope of the invention as set out in the appended claims. Thus, depending on the tube bundle, the arms may translate on sliders instead of rotating about a fixed axis. Where the arms rotate, they may be connected to an annular channel at their radially outer ends and the projectiles may be loaded into that channel instead of being fed into the hub. In that case, the arms may have stops at their radially inner ends to ensure that the projectiles in the different arms lie at different distances from the rotational axis.

Claims

1. A heat exchanger having two headers and a bundle of tubes having inner and outer walls and mouths at their opposite ends opening into the two headers, heat being exchanged in use between a process fluid flowing through the headers and the bundle of tubes and a second fluid
contacting the outer walls of the tubes, a distributor mounted within one header to position projectiles over the mouths of the tubes whereby the projectiles are entrained by the process fluid to flow along the tubes so as to scour inner walls of the tubes, wherein the distributor includes an arm movably mounted relative to the mouths of the tubes of the bundle that comprises a channel facing the mouths of the tubes, the arm being connected to a supply of
projectiles whereby the channel is arranged to contain a full complement of projectiles thereby distributing the projectiles evenly over the mouths of the tubes.
2. A heat exchanger as claimed in Claim 1, wherein the tube bundle is rectangular and the arm of the
distributor is slidably mounted for translation across a tube plate that forms a wall of the header and seals around the mouths of the tubes.
3. A heat exchanger as claimed in Claim 1, wherein the tube bundle is circular and the arm of the distributor is rotatable about the centre of the tube bundle.
4. A heat exchanger as claimed in Claim 3, wherein the distributor comprises a plurality of arms, the
projectiles in each arm being centred on different radii from the projectiles in the other arms.
5. A heat exchanger as claimed in Claim 4, wherein the distributor has four arms.
6. A heat exchanger as claimed in Claim 4 or 5, wherein the arms are arranged as spokes radiating from a common axis.
7. A heat exchanger as claimed in any one of claims 3 to 6, wherein the projectiles are supplied to the or each arm through a hub arranged at the axis of rotation of the distributor .
8. A heat exchanger as claimed in Claim 7 when appended to claim 5 or 6, wherein the hub is common to all the arms and serves to divert the projectiles to whichever arm is not filled with a full complement of projectiles.
PCT/IB2012/052537 2011-05-24 2012-05-21 Self-cleaning heat exchanger WO2012160505A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1108726.9 2011-05-24
GB1108726.9A GB2491143B (en) 2011-05-24 2011-05-24 Self-cleaning heat exchanger

Publications (1)

Publication Number Publication Date
WO2012160505A1 true WO2012160505A1 (en) 2012-11-29

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ID=44279544

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/052537 WO2012160505A1 (en) 2011-05-24 2012-05-21 Self-cleaning heat exchanger

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Country Link
GB (1) GB2491143B (en)
WO (1) WO2012160505A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104930911A (en) * 2015-03-11 2015-09-23 天津市通洁高压泵制造有限公司 Image location type shell-and-tube heat exchanger washing device
CN105880227A (en) * 2016-05-10 2016-08-24 苏州汇天河清洗技术有限公司 Full-automatic hydraulic pipe cleaning machine
CN110274514A (en) * 2019-06-24 2019-09-24 迟倩倩 A kind of rubber ball cleaning distributor of heat exchanger

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105728403B (en) * 2016-05-10 2018-05-04 苏州汇天河清洗技术有限公司 Hydraulic tube cleaning machine drum structure
CN110073169B (en) * 2016-11-28 2022-02-18 坎杜能源公司 System and method for cleaning a heat exchanger

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021117A (en) 1957-07-23 1962-02-13 Taprogge Josef Self-cleaning heat-exchanger
DE2822642B1 (en) * 1978-05-24 1979-08-09 Taprogge Reinigungsanlagen Tube heat exchanger with a cleaning device
DE2818033B1 (en) * 1978-04-25 1979-08-09 Taprogge Reinigungsanlagen Tube heat exchanger with a cleaning device
CA1113447A (en) * 1979-12-10 1981-12-01 Rollin A. Schwinghamer Method and apparatus for cleaning tubes in heat exchangers
DE3309371A1 (en) * 1983-03-16 1984-09-20 GEA Luftkühlergesellschaft Happel GmbH & Co, 4630 Bochum Device for heat transfer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5582299A (en) * 1978-12-16 1980-06-20 Kikan Buhin Seizo Kk Steel ball cleaning apparatus for boiler and others
JPS60240997A (en) * 1984-05-15 1985-11-29 Chubu Electric Power Co Inc Automatic washing device
GB2467942A (en) * 2009-02-23 2010-08-25 Tube Tech Int Ltd Self cleaning heat exchanger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021117A (en) 1957-07-23 1962-02-13 Taprogge Josef Self-cleaning heat-exchanger
DE2818033B1 (en) * 1978-04-25 1979-08-09 Taprogge Reinigungsanlagen Tube heat exchanger with a cleaning device
DE2822642B1 (en) * 1978-05-24 1979-08-09 Taprogge Reinigungsanlagen Tube heat exchanger with a cleaning device
CA1113447A (en) * 1979-12-10 1981-12-01 Rollin A. Schwinghamer Method and apparatus for cleaning tubes in heat exchangers
DE3309371A1 (en) * 1983-03-16 1984-09-20 GEA Luftkühlergesellschaft Happel GmbH & Co, 4630 Bochum Device for heat transfer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104930911A (en) * 2015-03-11 2015-09-23 天津市通洁高压泵制造有限公司 Image location type shell-and-tube heat exchanger washing device
CN105880227A (en) * 2016-05-10 2016-08-24 苏州汇天河清洗技术有限公司 Full-automatic hydraulic pipe cleaning machine
CN110274514A (en) * 2019-06-24 2019-09-24 迟倩倩 A kind of rubber ball cleaning distributor of heat exchanger

Also Published As

Publication number Publication date
GB201108726D0 (en) 2011-07-06
GB2491143B (en) 2014-07-09
GB2491143A (en) 2012-11-28

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