Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
  • F23J15/00—Arrangements of devices for treating smoke or fumes
  • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
  • F23K5/00—Feeding or distributing other fuel to combustion apparatus
  • F23K5/02—Liquid fuel
  • F23K5/14—Details thereof
  • F23K5/22—Vaporising devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
  • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E20/00—Combustion technologies with mitigation potential
  • Y02E20/30—Technologies for a more efficient combustion or heat usage

Definitions

• the present invention refers to a device for purifying fumes.
• the invention preferably may be realized in connection with an eneregy plant where this expression has to be given a very wide interpretation since it may include so different things as electric power stations, stockyards for ready-to-use combustible gas, refuse disposal units and the like as well as combinations thereof.
• a combined plant comprising a stockyard for combustible gas and a combustion plant is intended.
• the primary object of the invention is to provide a plant which is forbearing to the environment, i.e. a plant which to the environment delivers a minimum of harmful substances.
• Another object has been to provide a plant which combines simplicity in construction and attendance with a favourable operating economy.
• the illustrated plant includes a refuse disposal furnace, generally denoted 1, from which the fumes escape through a fume channel 2.
• a heat ex ⁇ changer 3 to utilize part of the heat content of the fumes and to diminish the fume temperature.
• a separation unit, generally designated k which in the illustrated embodiment consists of an obliquely arranged substantially box-shaped unit with a relatively thin walled separation surface 5, preferably made from a material with good heat conducting properties.
• the separa- tion surface preferably has an even and plane, probably polished sur ⁇ face.
• the wall 6 of the separation unit which is remote from the separation surface 5 is in contradistinction to the separation surface 5 made insulating.
• the separation unit is further closed upwardly and down- wardly.
• the separation unit is provided to continually transport a cooled combustible gas and has for this purpose a feed conduit 7 leading to a container 8 for such cooled gas.
• the container in question consists in the example of a container barge, containing LNG gas originally cooled down to a temperature of -160° C. At such a temperature the LNG gas is in a liquid state and it is known to store and transport such gas in special cooling ships. In practice the temperature inside the separation unit will be 1 0 C.
• conduit 9 which leads to a blowing fan 10 and from this blower fan a conduit 11 leads to the refuse disposal furnace 1.
• a conduit 9 can extend and through said conduit part of the cooled gas flowing through the conduit 7 can be transported to a stock for di ⁇ stribution of liquid LNG-gas and from the conduit 9 there may in the same manner be branched a conduit by means of which part of the LNG gas now in a gaseous state is transported to a stock for distribution of ready-to-use combustible gas.
• valves, sensors and similar control means which as being known to its construction as well as to the function will - not be described more in detail.
• a deflection plate 12 which as appears from the drawing has for its purpose to impart to the fumes flowing through the fume channel a movement which forces them to follow the separation surface from the top to the bottom and then change direction and escape in the direction of the arrow through the slot which is provided between the upper part of the separation unit k and the deflection plate 12 respectively the upper wall of the fume channel 2.
• an electrostatic filter 1 or the like may be arranged for removal of such impurities which have not already been removed by the separation unit.
• the fume channel leads to a chimney 15.
• the fume channel continues near to the separation unit in a funnel-shaped ash bin 16, below which a container 17 for receiving the waste separated by the separating unit may be introduced.
• cooling medium preferably continuously flows through the separation unit.
• a crystal linic deposit of primarily heavy metals but also other stuffs harmful to the environment occurs which means that the fume which continues to flow towards the electrostatic filter 14 has lost a major part of its harmful constituents.
• the cooling medium flowing through the separation unit has changed its state of aggregate from liquid to gaseous state and it is obvious that this means that one has achieved the double effect of bringing the cooling medium to the state in which it is used and of carrying out an effective cleaning of the smoke.
• the separation unit Owing to the inclination of the separation unit and the surface struc ⁇ ture of the separation surface 5 the deposits on the latter will to the major part fall down into the waste container through the ash bin 16 but it is of course also possible to provide the separation unit with means to continuously or in pulses draw off such deposits which have not got loose automatically.
• a means may comprise a scraper but also of a current fed loop filament which may be operated in pulses and provided in the separation surface.
• a plant of the general design shown and described is useful in coal and oil power stations but also in for instance steel works, aluminum works and the like where the amount of harmful stuffs often is high. It is of importance that the cleaning obtained according to the invention has been obtained by means of a dry method.
• the ash obtained by this method may often be used as a component in asphalt bricks or the like in which the harmful stuffs will be encapsuled.
• the gas should be cooled down to at least -100°C and preferably when natural gas is concerned to -140°C.
• Injection of lime powder may preferably take place near to the ash bin.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Separating Particles In Gases By Inertia (AREA)
• Treating Waste Gases (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
• Sampling And Sample Adjustment (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20364649

Family Applications (1)

Country Status (4)

Cited By (3)

Citations (4)

• 1986
  • 1986-05-26 SE SE8602394A patent/SE452501B/sv not_active IP Right Cessation
• 1987
  • 1987-05-19 NO NO872080A patent/NO161019C/no unknown
  • 1987-05-25 WO PCT/SE1987/000258 patent/WO1987007357A1/en unknown
  • 1987-05-25 AU AU75195/87A patent/AU7519587A/en not_active Abandoned

Patent Citations (4)

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