Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
  • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
  • C10J3/02—Fixed-bed gasification of lump fuel
  • C10J3/20—Apparatus; Plants
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
  • C10J2200/00—Details of gasification apparatus
  • C10J2200/09—Mechanical details of gasifiers not otherwise provided for, e.g. sealing means

Definitions

• the invention relates to a gas generator comprising a substantially cylindrical gasifier vessel, a grate on which the solid fuel being combusted is fed, a gasifier throat forming in the gasifier vessel a portion with a cross section narrower than that of the other portion of the gasifier and combustion air injection nozzles adapted above the gasifier throat to the gasifier vessel.
• the throat portion of gasifier vessel has a constant cross-sectional area.
• this is not an optimal situation, this is because the gasifier throat should at the maximum capacity demand conditions preferredly be capable of passing a larger volumetric gas flow than in the minimum capacity operating situation.
• variable cross-sectional area is implemented by means of a vertically movable control element, particularly a throttle cone.
• a vertically movable control element particularly a throttle cone.
• the throttle cone When the throttle cone is in its upper position, the volumetric gas flow through the gasifier throat is reduced to a value corresponding the minimum capacity of gas generator operation.
• a larger volumetric gas flow is allowed to pass unrestrictedly to the reducing layer of coal thus facilitating the operation of the gas generator at its maximum capacity.
• the gas generator in accordance with the invention is particularly characterized in that at the gasifier throat, substantially concentric with the cylindrical gasifier vessel center axis, is adapted an upward tapering control element of the gasifier throat cross-sectional area.
• a preferred embodiment of the gas generator according to the invention is characterized in that the control element is an upward tapering throttle cone adapted movable in the vertical direction.
• Another preferred embodiment of the gas generator according to the invention is characterized in that the support shaft of the vertically movable throttle cone is adapted to pass through the gasifier grate.
• a still another preferred embodiment of the gas generator according to the invention is characterized in that the throttle cone support shaft is connected to the gasifier grate such that the rotation of the throttle cone support shaft also causes rotation of the gasifier grate.
• the gasifier of the gas generator according to the invention is made adjustable to cope with the actual gasifier output demand so as to maintain at all times an optimum volumetric gas flow rate and temperature in the gasifier throat, whereby proper conditions are created for the generation of a product gas at maximized quality.
• reference numeral 1 a gasifier vessel that basically has a straight cylindrical shape with the exception of the gasifier throat 6, wherein the cross-sectional area of the vessel is con- stricted distinctly smaller than elsewhere in the gasifier vessel.
• the gasifier throat 6 is situated above the gasifier grate 2.
• Reference numeral 3 designates a gasifying coal bed and reference numeral 4 designates combustion air injection nozzles that are distributed evenly about the periphery of the gasifier vessel.
• the gasifier combustion zone 7 operates above the combustion air injection nozzles 4.
• a controllable throttle cone 5 of the gasifier throat In the middle of the gasifier, at the gasifier throat 6 in a position concentric with the vertical center axis of the gasifier is adapted a controllable throttle cone 5 of the gasifier throat.
• the shape of the throttle cone is made upward tapering.
• the throttle cone is supported by a shaft 9 adapted to extend through the underlying gasifier grate 2.
• a hydraulic actuator mechanism that moves the throttle cone 5 in the vertical direction thus accomplishing the control of the open cross-sectional area in the gasifier throat.
• the volumetric flow rate of gas passing via the throat In the upper position ofthe throttle cone, the volumetric flow rate of gas passing via the throat is controlled to a minimum value corresponding to the smallest output of the gas generator.
• a preset lower position of the throttle cone a larger volumetric flow of gas is permitted unobstructedly to the reducing coal bed thus facilitating maximum output from the gas generator.
• the gasifier grate 2 can be made rotatable, whereby the rotating movement is advantageously accomplished through the rotation of the cone support shaft 9.
• Such rotating movement of the shaft can be implemented using any appropriate actuator construction well known to a person skilled in the art.
• the rotating movement can be imposed directly on the grate, whereby the grate in turn rotates the throttle cone.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Solid-Fuel Combustion (AREA)
• Treating Waste Gases (AREA)
• Industrial Gases (AREA)
• Feeding And Controlling Fuel (AREA)
• Hydrogen, Water And Hydrids (AREA)
• Glass Compositions (AREA)
• Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8564858

Family Applications (1)

Country Status (9)

Cited By (3)

Families Citing this family (1)

Citations (4)

• 2002
  • 2002-11-01 FI FI20021946A patent/FI113781B/fi active
• 2003
  • 2003-10-21 DE DE60322934T patent/DE60322934D1/de not_active Expired - Fee Related
  • 2003-10-21 ES ES03753629T patent/ES2314231T3/es not_active Expired - Lifetime
  • 2003-10-21 AT AT03753629T patent/ATE404653T1/de not_active IP Right Cessation
  • 2003-10-21 JP JP2004547678A patent/JP2006504820A/ja active Pending
  • 2003-10-21 AU AU2003271794A patent/AU2003271794A1/en not_active Abandoned
  • 2003-10-21 EP EP03753629A patent/EP1558708B1/en not_active Expired - Lifetime
  • 2003-10-21 WO PCT/FI2003/000780 patent/WO2004039925A1/en active IP Right Grant
  • 2003-10-21 PT PT03753629T patent/PT1558708E/pt unknown

Patent Citations (4)

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