WO2017103345A1 - Method of cleaning heat transfer surfaces of a powerhouse - Google Patents
Method of cleaning heat transfer surfaces of a powerhouse Download PDFInfo
- Publication number
- WO2017103345A1 WO2017103345A1 PCT/FI2016/050897 FI2016050897W WO2017103345A1 WO 2017103345 A1 WO2017103345 A1 WO 2017103345A1 FI 2016050897 W FI2016050897 W FI 2016050897W WO 2017103345 A1 WO2017103345 A1 WO 2017103345A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slag
- particles
- cleaned
- blasting
- metal
- Prior art date
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
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
- F23J3/023—Cleaning furnace tubes; Cleaning flues or chimneys cleaning the fireside of watertubes in boilers
-
- 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
-
- 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
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
- F28G1/166—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from external surfaces of heat exchange conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
Definitions
- the heat-transfer surface of the combustion boiler is cleaned by blasting onto it, in water-free conditions, metal slag particles having a particle size of approximately 0.3-3.0 mm, and by using a blasting pressure of 8-12 bar.
- the surface to be cleaned comprises sulphur or silicate-bearing compounds which are generated when burning wood or fossil fuels or mixtures thereof, and possibly ash, coke or slag which comprise organic compounds (such as tar-like compounds).
- deposits and similar dirt layers which are generated during the combustion process are removed from the metal surfaces without substantially damaging these.
- the operation is carried out in essentially "water-free
- the particle size of the slag is within a pre-selected range.
- the particle size of the metal slag used (that is, the "grain size”) is approximately 0.3-3 mm. This means that the maximum dimension of at least 80 %, especially at least 90 %, usually at least 95 % of the particles is within the range in question.
- the average particle size of the nickel slag is within the range of 0.3-2.5 mm, for example 0.5-2.2 mm. Typically, this means that the maximum dimension of least 90 % of the particles, most suitably at least approximately 95 % (by weight) is within the said range.
- the particle size typically means the screened particle size (that is, grain-size).
- the blast nozzle used can be either small or large.
- the nozzle diameter may be, for example, 0.5-25 mm, usually approximately 1-15 mm, typically approximately 12 mm. These nozzle sizes are particularly suitable for the application described above, in which the metal slag particles have a narrow distribution of particle size.
- the blasting is carried out by using a blasting pressure of 8-12 bar. More preferably, the pressure used is 9-11 bar. At this pressure, an efficient cleaning of the dirt layers is achieved and, at the same time, damage to the surface is avoided.
- the consumption of air varies with the nozzle size, but is generally approximately 50-2500 1/min, most suitably approximately 70-1500 1/min, for example approximately 150-1000 1/min.
- the blasting can be carried out by using a nozzle which is straight, curved or bent at 45 degrees.
- the shape of the nozzle is selected according to the object to be cleaned.
- the surface does not corrode as easily as after treatment in which sand is used.
- the surface is not prone to become dirty.
- nickel slag forms a chromium oxide compound on the metal surface, which compound protects the metal from corrosion, and which, on the other hand, also slows down the adhesion of new dirt to the metal surface.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cleaning In General (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16874973.7A EP3390908B1 (en) | 2015-12-18 | 2016-12-19 | Method of cleaning heat transfer surfaces of a powerhouse |
PL16874973T PL3390908T3 (en) | 2015-12-18 | 2016-12-19 | Method of cleaning heat transfer surfaces of a powerhouse |
BR112018012229-7A BR112018012229B1 (en) | 2015-12-18 | 2016-12-19 | METHOD OF CLEANING HEAT TRANSFER SURFACES OF A POWER HOUSE |
DK16874973.7T DK3390908T3 (en) | 2015-12-18 | 2016-12-19 | PROCEDURE FOR CLEANING HEAT TRANSFER SURFACES IN A POWER HOUSE |
ES16874973T ES2898784T3 (en) | 2015-12-18 | 2016-12-19 | Cleaning method of heat transfer surfaces of a power plant |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20155970A FI128181B (en) | 2015-12-18 | 2015-12-18 | Method for cleaning heat transfer surfaces in a combustion boiler |
FI20155970 | 2015-12-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017103345A1 true WO2017103345A1 (en) | 2017-06-22 |
Family
ID=59055950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2016/050897 WO2017103345A1 (en) | 2015-12-18 | 2016-12-19 | Method of cleaning heat transfer surfaces of a powerhouse |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP3390908B1 (en) |
BR (1) | BR112018012229B1 (en) |
DK (1) | DK3390908T3 (en) |
ES (1) | ES2898784T3 (en) |
FI (1) | FI128181B (en) |
PL (1) | PL3390908T3 (en) |
PT (1) | PT3390908T (en) |
WO (1) | WO2017103345A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019058031A1 (en) | 2017-09-22 | 2019-03-28 | Clean Steel International Oy | Method and apparatus for cleaning internal surfaces of boilers and a boiler comprising such apparatus |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4348340A (en) * | 1980-05-20 | 1982-09-07 | Francis Gagneraud | Production of spheroidal granules from molten inorganic materials |
US4666083A (en) * | 1985-11-21 | 1987-05-19 | Fluidyne Corporation | Process and apparatus for generating particulate containing fluid jets |
DE19723389A1 (en) * | 1997-06-04 | 1998-12-10 | Anton Dipl Ing Thes | Boiler cleaning process |
EP2113339A1 (en) * | 2008-04-30 | 2009-11-04 | Omya Development AG | Alkaline earth carbonate containing mineral for surface cleaning |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2132220C (en) * | 1992-10-08 | 1995-05-16 | Julius Stephen Csabai | Specular hematite as an impact material |
-
2015
- 2015-12-18 FI FI20155970A patent/FI128181B/en active IP Right Review Request
-
2016
- 2016-12-19 WO PCT/FI2016/050897 patent/WO2017103345A1/en active Application Filing
- 2016-12-19 ES ES16874973T patent/ES2898784T3/en active Active
- 2016-12-19 PT PT168749737T patent/PT3390908T/en unknown
- 2016-12-19 PL PL16874973T patent/PL3390908T3/en unknown
- 2016-12-19 BR BR112018012229-7A patent/BR112018012229B1/en active IP Right Grant
- 2016-12-19 DK DK16874973.7T patent/DK3390908T3/en active
- 2016-12-19 EP EP16874973.7A patent/EP3390908B1/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4348340A (en) * | 1980-05-20 | 1982-09-07 | Francis Gagneraud | Production of spheroidal granules from molten inorganic materials |
US4666083A (en) * | 1985-11-21 | 1987-05-19 | Fluidyne Corporation | Process and apparatus for generating particulate containing fluid jets |
DE19723389A1 (en) * | 1997-06-04 | 1998-12-10 | Anton Dipl Ing Thes | Boiler cleaning process |
EP2113339A1 (en) * | 2008-04-30 | 2009-11-04 | Omya Development AG | Alkaline earth carbonate containing mineral for surface cleaning |
Non-Patent Citations (1)
Title |
---|
See also references of EP3390908A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019058031A1 (en) | 2017-09-22 | 2019-03-28 | Clean Steel International Oy | Method and apparatus for cleaning internal surfaces of boilers and a boiler comprising such apparatus |
Also Published As
Publication number | Publication date |
---|---|
FI128181B (en) | 2019-11-29 |
BR112018012229B1 (en) | 2022-08-16 |
EP3390908A1 (en) | 2018-10-24 |
ES2898784T3 (en) | 2022-03-08 |
EP3390908B1 (en) | 2021-08-18 |
FI20155970A (en) | 2017-06-19 |
PL3390908T3 (en) | 2022-01-31 |
PT3390908T (en) | 2021-11-19 |
DK3390908T3 (en) | 2021-11-22 |
BR112018012229A2 (en) | 2018-11-27 |
EP3390908A4 (en) | 2019-06-26 |
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