EP1128151A1 - Reinigungsanlage zur Entfernung von Russ - Google Patents

Reinigungsanlage zur Entfernung von Russ Download PDF

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Publication number
EP1128151A1
EP1128151A1 EP00200630A EP00200630A EP1128151A1 EP 1128151 A1 EP1128151 A1 EP 1128151A1 EP 00200630 A EP00200630 A EP 00200630A EP 00200630 A EP00200630 A EP 00200630A EP 1128151 A1 EP1128151 A1 EP 1128151A1
Authority
EP
European Patent Office
Prior art keywords
flow
flow passage
air
processing system
inlet
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.)
Withdrawn
Application number
EP00200630A
Other languages
English (en)
French (fr)
Inventor
Knud Sundgaard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OKR Cleaning
Original Assignee
OKR Cleaning
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 OKR Cleaning filed Critical OKR Cleaning
Priority to EP00200630A priority Critical patent/EP1128151A1/de
Priority to DK01200244T priority patent/DK1134537T3/da
Priority to AT01200244T priority patent/ATE279708T1/de
Priority to DE60106313T priority patent/DE60106313T2/de
Priority to EP01200244A priority patent/EP1134537B1/de
Priority to ES01200244T priority patent/ES2230230T3/es
Priority to US09/775,023 priority patent/US6588049B2/en
Publication of EP1128151A1 publication Critical patent/EP1128151A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

Definitions

  • the present invention relates to a device for use in a device for use in a cleaning installation for removing soot or similar inside deposits in a flow channel in a processing system such as a boiler, heat exchanger, flue gas filter or the like, by intermittently blasting a fluid or gaseous medium into the flow channel of the processing system, said device comprising a flow passage between associated valve means and the processing system.
  • a processing system such as a boiler, heat exchanger, flue gas filter or the like
  • the invention also relates to a cleaning installation of such kind.
  • the cleaning equipment is often subjected to heat and corrosive impact from the gasses inside the boiler installation. This results in limited durability of the cleaning equipment due to the aggressive environment of the flue gasses. For this reason, the cleaning equipment is often mounted on the outside of the gas chamber of the boiler.
  • the cleaning equipment typically comprises a pressure vessel from which pressurised air is fed to a number of diaphragm valves.
  • the valves are controlled by control means.
  • the control means activate the valves in a pre-programmed sequence and the pipes in the boiler governed by the associated valve are blasted with the pressurised air.
  • the air is blasted for 0,1-1 second at an interval of approx. 2-10 minutes.
  • This cleaning cycle i.e. the duration and the frequency, can be adjusted according to requirements as can the type of fuel, the amount of fouling and the boiler output.
  • the pressure vessel is usually operated at about 7-8 bars. However, this can also be adjusted in accordance with the actual requirements of the boiler installation.
  • the components are particularly subjected to corrosion due to the hot, aggressive flue gasses during off-cycles, i.e. when no air is blasted through the valve assembly, into the associated tube passage and into the boiler.
  • flue gas will escape from the main gas stream in the boiler and fill the passage space. This causes mechanical wear of the exposed components of the cleaning equipment which, in turn, reduces the cleaning efficiency and causes a drop in the efficiency of the boiler installation.
  • the object of the invention is to provide a device which reduces the corrosion of the exposed components of the cleaning equipment in a soot cleaning installation.
  • the object is achieved by a device and a cleaning installation of the initially mentioned kind wherein the flow passage is provided with an inlet allowing for a continuous flow of protective gas around the flow passage into the flow channel of the processing system.
  • the present invention corrosion is reduced since a cushion of air is generated at the end of the flow passage during the off-cycles of the cleaning operation as air is constantly drawn or forced through the inlet.
  • the valve means are protected from corrosion and tests have shown a significant improvement in durability of the exposed components facing the inside of the boiler or the like.
  • components such as the valve housing can be produced in an inexpensive material such as cast iron without compromising the durability of the valve means.
  • the flow passage comprises an annular space between an inner tubular and an outer tubular member, where the outer tubular member features the air inlet providing a continuous air flow around the flow passage into the processing system.
  • the outer tubular member features the air inlet providing a continuous air flow around the flow passage into the processing system.
  • the air is simply drawn in around the flow passage and into the inner end region of the flow passage utilising the Ventura effect due to the speed of the gas flow in the boiler, heat exchanger or the like.
  • the air inlet is provided with an injector for the supply of air into the flow passage. This means that air can be forced into the air inlet for the creation of a protective air cushion at the inner end section even if the sub-pressure created by the flow rate of the gasses or the like is insufficient for the creation of an air cushion.
  • the device is provided with a plurality of air inlets.
  • the amount of air can be enhanced and the shape of the air cushion can be adjusted according to the radial position of the air inlet around the flow passage.
  • the air inlet is provided with replaceable flow restriction means.
  • the replaceable flow restriction means may consist of a cover plate provided with one or more apertures through which the air is allowed to flow into the annular spacing.
  • the continuous inlet air flow can be restricted so that the amount of incoming air is not influencing the gasses inside the boiler.
  • Figure 1 shows a cleaning installation for pressurised air blast cleaning for removal of sediments inside a heat exchanger, boiler or a similar and preferably tubular installation.
  • the installation comprises a number of valve means 1 connected to a vessel 2 of pressurised air.
  • the vessel 2 is in communication with the individual valve means 1 through a main line 3 and associated supply lines 4.
  • the valve means are controlled by a control system (not shown) controlling the operating cycle of the individual valve means 1 and the cleaning cycle as a whole.
  • valve means 1 are shown in detail in figures 2 and 3.
  • the valve means 1 comprises a solenoid valve 10 provided control means 11 for control of the valve 10.
  • the valve 10 is supplied with pressurised air from the supply lines 3, 4. Once the valve 10 is opened, pressurised air is blasted into a flow passage 5 and into a flow channel 9 of a processing system, such as a boiler or the reverse chamber of a heat exchanger.
  • the flow passage 5 comprises a double wall tubular structure comprising an inner tubular member 7 and an outer tubular member 6 arranged concentrically.
  • the outer member 6 is provided with an air inlet 8 through which air can be drawn or forced (not shown) into the annular space between the two tubular members 6, 7. From this annular space the air is drawn into the end section of the flow passage 15 where a cushion of air is formed preventing the flue gasses in the flow channel 9 from entering the flow passage and coming into contact with the components of the valve 10.
  • Air or a similar protective gas can be sucked towards the flow channel 9 due to the flow of gas in the flow channel 9.
  • air can be supplied by connecting an air or a gas supply to the air inlet 8.
  • valve means 1 are shown in a fixed installation.
  • valve 10 is connected to the flow channel 9 by a flexible tubular piece 12 secured by tightening means 13 at the ends.

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)
  • Cleaning In General (AREA)
EP00200630A 2000-02-23 2000-02-23 Reinigungsanlage zur Entfernung von Russ Withdrawn EP1128151A1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP00200630A EP1128151A1 (de) 2000-02-23 2000-02-23 Reinigungsanlage zur Entfernung von Russ
DK01200244T DK1134537T3 (da) 2000-02-23 2001-01-24 Renseanlæg til fjernelse af sod
AT01200244T ATE279708T1 (de) 2000-02-23 2001-01-24 Reinigungsanlage zur entfernung von russ
DE60106313T DE60106313T2 (de) 2000-02-23 2001-01-24 Reinigungsanlage zur Entfernung von Russ
EP01200244A EP1134537B1 (de) 2000-02-23 2001-01-24 Reinigungsanlage zur Entfernung von Russ
ES01200244T ES2230230T3 (es) 2000-02-23 2001-01-24 Instalacion de limpieza para eliminar el ollin.
US09/775,023 US6588049B2 (en) 2000-02-23 2001-02-01 Cleaning installation and device for removing soot or similar deposits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00200630A EP1128151A1 (de) 2000-02-23 2000-02-23 Reinigungsanlage zur Entfernung von Russ

Publications (1)

Publication Number Publication Date
EP1128151A1 true EP1128151A1 (de) 2001-08-29

Family

ID=8171074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00200630A Withdrawn EP1128151A1 (de) 2000-02-23 2000-02-23 Reinigungsanlage zur Entfernung von Russ

Country Status (1)

Country Link
EP (1) EP1128151A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106403280A (zh) * 2016-06-25 2017-02-15 五洲丰农业科技有限公司 利用烟气余热的肥料生产工艺热风供给***

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3409995C1 (de) * 1984-03-19 1985-03-14 Norsk Hydro Magnesiumgesellschaft mbH, 4300 Essen Steigrohr, insbesondere für eine Niederdruck-Gießvorrichtung
US4874037A (en) * 1984-07-18 1989-10-17 Korf Engineering Gmbh Apparatus for cooling a hot product gas
US5517950A (en) * 1993-05-26 1996-05-21 Kendrick; William E. System for slag removal and the like
US5724829A (en) * 1996-02-08 1998-03-10 Schubach; Frank Chiller heating assembly
EP0865023A1 (de) 1997-03-13 1998-09-16 Kockum Sonics Aktiebolag Schallgenerator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3409995C1 (de) * 1984-03-19 1985-03-14 Norsk Hydro Magnesiumgesellschaft mbH, 4300 Essen Steigrohr, insbesondere für eine Niederdruck-Gießvorrichtung
US4874037A (en) * 1984-07-18 1989-10-17 Korf Engineering Gmbh Apparatus for cooling a hot product gas
US5517950A (en) * 1993-05-26 1996-05-21 Kendrick; William E. System for slag removal and the like
US5724829A (en) * 1996-02-08 1998-03-10 Schubach; Frank Chiller heating assembly
EP0865023A1 (de) 1997-03-13 1998-09-16 Kockum Sonics Aktiebolag Schallgenerator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106403280A (zh) * 2016-06-25 2017-02-15 五洲丰农业科技有限公司 利用烟气余热的肥料生产工艺热风供给***
CN106403280B (zh) * 2016-06-25 2021-09-28 五洲丰农业科技有限公司 利用烟气余热的肥料生产工艺热风供给***

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