WO2004110658A1 - Method for cleaning a product gas pipe which contains inpurities and an apparatus which uses the method - Google Patents

Method for cleaning a product gas pipe which contains inpurities and an apparatus which uses the method Download PDF

Info

Publication number
WO2004110658A1
WO2004110658A1 PCT/FI2004/000357 FI2004000357W WO2004110658A1 WO 2004110658 A1 WO2004110658 A1 WO 2004110658A1 FI 2004000357 W FI2004000357 W FI 2004000357W WO 2004110658 A1 WO2004110658 A1 WO 2004110658A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
impurities
cleaning
product gas
chains
Prior art date
Application number
PCT/FI2004/000357
Other languages
French (fr)
Inventor
Timo Saares
Original Assignee
Timo Saares
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 Timo Saares filed Critical Timo Saares
Priority to EP04742100A priority Critical patent/EP1660247B1/en
Priority to DE602004018655T priority patent/DE602004018655D1/en
Publication of WO2004110658A1 publication Critical patent/WO2004110658A1/en

Links

Classifications

    • 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
    • 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
    • B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
    • B08B9/0436—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets

Definitions

  • the present invention relates to a method for cleaning a pipe carrying a product gas containing impurities, said pipe being substantially rectangular in cross-section.
  • the invention also relates to an apparatus implementing the method.
  • the invention thus relates to piping for a product gas containing different impurities.
  • Impurities are produced e.g. in connection with energy production in gasification power plants.
  • thermal power plants based on gasification it is common that the pipes used to conduct gases containing impurities get clogged with time. Therefore, the pipes have to be cleaned from time to time, which involves an interruption of actual energy production. This causes additional costs. Moreover, the cleaning is a cumbersome operation.
  • the object of the present invention is to create a method for use in this type of gas pipe system that is free of the above-described drawbacks.
  • the method of the invention is characterized in that solid and/or liquid impurities are detached from the walls of the pipe and returned into the apparatus, such as a gas generator, producing the product gas.
  • a further object of the invention is to create an apparatus for implementing the method.
  • the apparatus is primarily characterized in that a mechanical system for cleaning the pipe walls has been built inside the pipe, and the impurities detached during the cleaning are returned by the same system into the device, such as a gas generator, producing the product gas.
  • a preferred embodiment of the apparatus of the invention is characterized in that the apparatus comprises a pair of chain sprockets mounted beside the side walls of the pipe at each end of the pipe, at least one of said pairs of chain sprockets being arranged to be operated by a motor, said chain sprockets carrying endless chains running at either side wall of the pipe, to which chains are attached cleaning elements moving with the chains and oriented in the widthwise direction of the pipe, said elements having a width substantially equal to the width of the pipe.
  • a second preferred embodiment of the apparatus of the invention is characterized in that the cleaning elements are chain scrapers mounted between the chains at a distance from each other, which chain scrapers clean the pipe wall as the chains are moving and which carry the detached impurities back into the device producing the gas.
  • a further preferred embodiment of the apparatus of the invention is characterized in that some of the chain scrapers have been arranged to clean the upper and lower surfaces of the pipe and some to clean the lateral surfaces of the pipe.
  • Fig. 1 presents a sectional side view of a gas pipe provided with an apparatus according to the invention.
  • Fig. 2 presents a sectional top view of a gas pipe provided with an apparatus according to the invention.
  • Fig. 3 presents a cross-section of a gas pipe provided with an apparatus according to the invention.
  • reference number 1 indicates the gasification space of a device producing energy gases.
  • the product gas is conducted into a pipe 2, the first end of which is provided with a pair of idler sprockets 4 and the second end with a pair of driving sprockets 3.
  • the second end of the gas pipe is connected to a device 6 that utilizes the product gas.
  • the pipe is substantially rectangular in cross-section.
  • the chains are moved by means of the driving sprocket pair 3.
  • the driving sprocket pair 3 is driven by a drive machine 7, such as an electric motor. For power transmission from the drive machine, a drive shaft 11 is used.
  • Chain scrapers 8 mounted on the chains 5 are cleaning elements, especially chain scrapers 8, 10, in a transverse position relative to the longitudinal direction of the pipe 2. As the chain scrapers are moving, they detach impurities accumulated on the pipe walls and carry them back into the gasification space 1. Scrapers 8 are so mounted that they clean the upper and lower surfaces of the pipe, while scrapers 10 are so mounted that they clean the lateral surfaces of the pipe. While the scrapers detach impurities from the inner walls of the pipe as they are moving, they also carry the impurities back into the gasification space.

Abstract

A method for cleaning a pipe (2) carrying a product gas containing impurities, said pipe being substantially rectangular in cross-section. The invention is so implemented that solid and/or liquid impurities are detached from the walls of the pipe (2) and returned into the device (1), such as a gas generator, producing the product gas. The invention also relates to an apparatus implementing the method.

Description

METHOD FOR CLEANING A PRODUCT GAS PIPE WHICH CONTAINS IMPURITIES AND AN APPARATUS WHICH USES THE METHOD
The present invention relates to a method for cleaning a pipe carrying a product gas containing impurities, said pipe being substantially rectangular in cross-section. The invention also relates to an apparatus implementing the method.
The invention thus relates to piping for a product gas containing different impurities. Impurities are produced e.g. in connection with energy production in gasification power plants. In thermal power plants based on gasification it is common that the pipes used to conduct gases containing impurities get clogged with time. Therefore, the pipes have to be cleaned from time to time, which involves an interruption of actual energy production. This causes additional costs. Moreover, the cleaning is a cumbersome operation.
The object of the present invention is to create a method for use in this type of gas pipe system that is free of the above-described drawbacks. The method of the invention is characterized in that solid and/or liquid impurities are detached from the walls of the pipe and returned into the apparatus, such as a gas generator, producing the product gas.
In the method of the invention, it is possible to remove impurities continuously or according to need.
A further object of the invention is to create an apparatus for implementing the method. The apparatus is primarily characterized in that a mechanical system for cleaning the pipe walls has been built inside the pipe, and the impurities detached during the cleaning are returned by the same system into the device, such as a gas generator, producing the product gas.
A preferred embodiment of the apparatus of the invention is characterized in that the apparatus comprises a pair of chain sprockets mounted beside the side walls of the pipe at each end of the pipe, at least one of said pairs of chain sprockets being arranged to be operated by a motor, said chain sprockets carrying endless chains running at either side wall of the pipe, to which chains are attached cleaning elements moving with the chains and oriented in the widthwise direction of the pipe, said elements having a width substantially equal to the width of the pipe.
A second preferred embodiment of the apparatus of the invention is characterized in that the cleaning elements are chain scrapers mounted between the chains at a distance from each other, which chain scrapers clean the pipe wall as the chains are moving and which carry the detached impurities back into the device producing the gas.
A further preferred embodiment of the apparatus of the invention is characterized in that some of the chain scrapers have been arranged to clean the upper and lower surfaces of the pipe and some to clean the lateral surfaces of the pipe.
Using the method of the invention and the apparatus implementing it, effective cleaning of the gas pipe is achieved without a necessity to interrupt the production process. At the same time, the energy content of the impurities can be effectively utilized.
In the following, the invention will be described in detail with reference to a preferred example embodiment of the invention and the attached drawings, wherein
Fig. 1 presents a sectional side view of a gas pipe provided with an apparatus according to the invention.
Fig. 2 presents a sectional top view of a gas pipe provided with an apparatus according to the invention.
Fig. 3 presents a cross-section of a gas pipe provided with an apparatus according to the invention.
In figures 1 and 2, reference number 1 indicates the gasification space of a device producing energy gases. The product gas is conducted into a pipe 2, the first end of which is provided with a pair of idler sprockets 4 and the second end with a pair of driving sprockets 3. The second end of the gas pipe is connected to a device 6 that utilizes the product gas. The pipe is substantially rectangular in cross-section.
Mounted on the sprockets, i.e. on the idler sprocket pair 4 and the driving sprocket pair 3, are two chains 5, one at each side of the pipe 2, inside the pipe. Attached to the side walls of the pipe 2 are guide bars 9 for guiding the chains 5. The chains are moved by means of the driving sprocket pair 3. The driving sprocket pair 3 is driven by a drive machine 7, such as an electric motor. For power transmission from the drive machine, a drive shaft 11 is used.
Mounted on the chains 5 are cleaning elements, especially chain scrapers 8, 10, in a transverse position relative to the longitudinal direction of the pipe 2. As the chain scrapers are moving, they detach impurities accumulated on the pipe walls and carry them back into the gasification space 1. Scrapers 8 are so mounted that they clean the upper and lower surfaces of the pipe, while scrapers 10 are so mounted that they clean the lateral surfaces of the pipe. While the scrapers detach impurities from the inner walls of the pipe as they are moving, they also carry the impurities back into the gasification space.
It is possible to connect the cleaning system to other automatic equipment of the plant, whereby the drive machine can be operated continuously or periodically as needed.
It is obvious to the person skilled in the art that the invention is not limited to the embodiment example described above, but that it may be varied within the scope of the claims presented below.

Claims

1. A method for cleaning a pipe (2) carrying a product gas containing impurities, said pipe being substantially rectangular in cross- section, characterized in that solid and/or liquid impurities are detached from the walls of the pipe (2) and returned into the device (1), such as a gas generator, producing the product gas.
2. A method according to claim 1, characterized in that impurities are removed according to need.
3. A method according to claim 1 , characterized in that impurities are removed continuously.
4. An apparatus for cleaning a product gas pipe containing impurities, said pipe (2) being substantially rectangular in cross-section, characterized in that a mechanical system for cleaning the pipe walls has been built inside the pipe, and the impurities detached during cleaning are returned by the same system into the device (1), such as a gas generator, producing the product gas.
5. An apparatus according to claim 4, characterized in that the apparatus comprises a pair of chain sprockets (3, 4) mounted beside the side walls of the pipe at each end of the pipe, at least one of said pairs of chain sprockets being arranged to be driven by a drive machine (7), such as an electric motor, said chain sprockets carrying endless chains (5) running at either side wall of the pipe, to which chains are attached cleaning elements (8, 10) moving with the chains, said elements being oriented in the widthwise direction of the pipe and having a width substantially equal to the width of the pipe.
6. An apparatus according to claim 5, characterized in that the cleaning elements are chain scrapers (8, 10) mounted on the chains (5) at a distance from each other, which chain scrapers clean the wall of the pipe (2) as the chains are moving and which carry the detached impurities back into the device (1) producing the gas.
7. An apparatus according to claim 5 or 6, characterized in that some (8) of the chain scrapers have been arranged to clean the upper and lower surfaces of the pipe and some (10) to clean the lateral surfaces of the pipe.
PCT/FI2004/000357 2003-06-16 2004-06-10 Method for cleaning a product gas pipe which contains inpurities and an apparatus which uses the method WO2004110658A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04742100A EP1660247B1 (en) 2003-06-16 2004-06-10 Method for cleaning a product gas pipe which contains inpurities and an apparatus which uses the method
DE602004018655T DE602004018655D1 (en) 2003-06-16 2004-06-10 METHOD FOR CLEANING A PRODUCT GAS TUBE CONTAINING ANY CONTAMINATION AND DEVICE FOR USING THE SAID METHOD

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20030900A FI118522B (en) 2003-06-16 2003-06-16 Method for purifying the product pipeline containing the impurities and equipment applying the method
FI20030900 2003-06-16

Publications (1)

Publication Number Publication Date
WO2004110658A1 true WO2004110658A1 (en) 2004-12-23

Family

ID=8566261

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2004/000357 WO2004110658A1 (en) 2003-06-16 2004-06-10 Method for cleaning a product gas pipe which contains inpurities and an apparatus which uses the method

Country Status (5)

Country Link
EP (1) EP1660247B1 (en)
AT (1) ATE418397T1 (en)
DE (1) DE602004018655D1 (en)
FI (1) FI118522B (en)
WO (1) WO2004110658A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004278A (en) * 1959-12-02 1961-10-17 Stanley Bledsoe Corp Pipe cleaning apparatus
US3155319A (en) * 1961-06-16 1964-11-03 Hammelmann Paul Large size pipe cleaning, sewer system cleaning and fire fighting vehicle
US3562836A (en) * 1968-12-30 1971-02-16 Raymond M Bremner Reaming tool
US3604042A (en) * 1969-10-23 1971-09-14 Raymond M Bremner Pipe-cleaning tool
US3800358A (en) * 1972-05-08 1974-04-02 J Ryan Duct cleaning apparatus
US4792363A (en) * 1988-02-01 1988-12-20 Franklin Jr Smead P Vent cleaning system
US5244505A (en) * 1990-07-13 1993-09-14 Pipe Rehab International, Inc. Method for cleaning pipe
FI940790A (en) * 1991-08-19 1994-03-18 Sven Eriksson Device for internal cleaning and / or treatment of long closed channels
US20020102136A1 (en) * 2001-01-31 2002-08-01 Cal Holland Robotic apparatus and method for treatment of conduits

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE628502C (en) * 1934-09-18 1936-04-06 Wilhelm Von Der Linde Jr Device for cleaning furnace pipes
DE1094912B (en) * 1955-06-15 1960-12-15 William Herbert Smith Device for cleaning the flue gas side of the flue pipes of standing boilers

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004278A (en) * 1959-12-02 1961-10-17 Stanley Bledsoe Corp Pipe cleaning apparatus
US3155319A (en) * 1961-06-16 1964-11-03 Hammelmann Paul Large size pipe cleaning, sewer system cleaning and fire fighting vehicle
US3562836A (en) * 1968-12-30 1971-02-16 Raymond M Bremner Reaming tool
US3604042A (en) * 1969-10-23 1971-09-14 Raymond M Bremner Pipe-cleaning tool
US3800358A (en) * 1972-05-08 1974-04-02 J Ryan Duct cleaning apparatus
US4792363A (en) * 1988-02-01 1988-12-20 Franklin Jr Smead P Vent cleaning system
US5244505A (en) * 1990-07-13 1993-09-14 Pipe Rehab International, Inc. Method for cleaning pipe
FI940790A (en) * 1991-08-19 1994-03-18 Sven Eriksson Device for internal cleaning and / or treatment of long closed channels
US20020102136A1 (en) * 2001-01-31 2002-08-01 Cal Holland Robotic apparatus and method for treatment of conduits

Also Published As

Publication number Publication date
EP1660247B1 (en) 2008-12-24
EP1660247A1 (en) 2006-05-31
ATE418397T1 (en) 2009-01-15
DE602004018655D1 (en) 2009-02-05
FI20030900A0 (en) 2003-06-16
FI20030900A (en) 2004-12-17
FI118522B (en) 2007-12-14

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