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
  • C10J3/46—Gasification of granular or pulverulent flues in suspension
  • C10J3/48—Apparatus; Plants
  • C10J3/50—Fuel charging devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
  • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
  • F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D1/00—Burners for combustion of pulverulent fuel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
  • F23K2203/00—Feeding arrangements
  • F23K2203/006—Fuel distribution and transport systems for pulverulent fuel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
  • F23K2203/00—Feeding arrangements
  • F23K2203/20—Feeding/conveying devices
  • F23K2203/201—Feeding/conveying devices using pneumatic means

Definitions

• the invention is directed to a method for equalizing and controlling the pneumatically promoted with dense phase promotion solid fuels in a gasifier for the production of synthesis gas.
• the controlled supply of combustible dust in an entrained-flow gasifier is described, for example, in DE 10 2005 047 583 A. It is known to convert the fuel with the burners installed in the vertical gasifier wall and substantially horizontal, wherein the fuel of finely divided or dusty ( ⁇ 0.5 mm) fuel particles, e.g. Coal, Petrokoks, biological waste and other fuels is reacted with oxygen-containing gasification agents under elevated pressure at temperatures above the slag melting point.
• finely divided or dusty ( ⁇ 0.5 mm) fuel particles e.g. Coal, Petrokoks, biological waste and other fuels is reacted with oxygen-containing gasification agents under elevated pressure at temperatures above the slag melting point.
• a carbonaceous fuel is reacted with an oxygen-containing gas, wherein the oxygen-containing gas is supplied to the sub-stoichiometric ratio, so as to obtain a hydrogen and carbon monoxide-containing product gas.
• the fuel-oxygen ratio is set in a narrow range.
• the pressure gasification burner with coaxial channels are usually used, with a mixing of the fed media not in the burner, but only in the carburetor.
• An example of a burner used in a pressure gasification plant is shown in detail, for example, in EP 0 437 698 A1.
• the supply of the burner with fuel usually takes place from a slightly above the gasifier pressure storage tank by means of dense phase conveying.
• dense phase conveying a pneumatic conveying is referred to, wherein the carrier gas does not transport the fuel particles as individual particles, but in the form of dense fillings or plugs that fill the entire pipe cross-section.
• dense-phase conveyors have velocities of 4 to 6 m / s, the high solids loading of the gas stream leading to a nevertheless high transport volume.
• the dense phase conveying is very gentle on materials and, above all, is less susceptible to interference when it comes to adhesive or moist goods to be transported.
• the quality of the gasification is significantly influenced by the uniformity of the coal supply to the burner. While variations are detected and taken into account over longer time intervals (for example, by intended control interventions or by changing the feed coal, etc.), very short-term fluctuations in the conveying quality (conveying density and speed) can not be compensated.
• the dense phase conveying in the broadest sense is a fluidized gas / solids mixture
• the fluctuations in density and velocity typical of the fluidized bed are also to be observed here.
• These can only be influenced by indirect measures such as the design of the supply to the delivery line.
• the storage tank which supplies the burners via a feed line
• the burners are due to the vertical design of the carburetor at a much higher level.
• the installation of the reservoir "bottom” is inexpensive, especially if the required fuel spill into the feed tank based on gravity flow and therefore must be positioned above the reservoir.
• Object of the present invention is to provide a method described above in such a way that a significantly homogenized supply of coal to the burner is possible, whereby the short-term fluctuations minimized and thus the gasification quality is improved and the control of the amount of coal to the burner is made more effective.
• this object is achieved according to the invention in that the fine-grained to dust-like fuel from a positioned below the burner level storage tank initially promoted to a level above the burner level and is subsequently homogenized in a downward direction to the burner line. It has been found that a uniformity of the fuel / gas mixture transported in the dense stream is achieved by the inventive method, which is significantly better than, for example, the promotion by horizontally extending lines. Due to the homogenization in the downpipe in front of the burner, the fuel particles are accelerated by the gravitational attraction, whereby any gas bubbles in the mixture are filled with fuel during the fall.
• Embodiments emerge from the subclaims. It can be provided that the homogenization takes place in a downwardly directed line whose length corresponds to at least five times the diameter of the pipe.
• the fuel is homogenized in a down pipe guided from a manifold, wherein the downpipe is oriented at angles ⁇ 20 °, preferably in 0 ° to the vertical.
• the region in which the downpipe can be adjusted with respect to the vertical can also be chosen differently than claimed here, depending on which material is used, the homogenization in the downpipe being decisive.
• a further advantageous embodiment according to the invention is that the fuel flow gas is supplied to control the fuel flow, the mixing is made shortly before or in the burner.
• the example shows that a very fast adjustment of the fuel throughput is possible.
• the regulatory range is limited by the amount of gas required and the erosion-limited fuel velocity in the burner.
• the fuel flow rate can be changed by +/- 10% in a typical application.
• Fig. 1 is a schematic layer diagram and in
• Fig. 2 is an enlarged section in the region of a not burner shown in an indicated carburetor wall.
• Fig. 1 shows the dense stream promotion 2a and 2b from the storage tank 1 in the burner ' 4a, 4b of the carburetor 3.
• the outlet of the storage container is lower than the burner, so that the fuel should be conveyed horizontally and upwards.
• the fuel is first passed over the burner level and then homogenized after deflection in an example 3 m long downpipe. Shortly before the burner, the lines are deflected to feed the fuel horizontally into the burner and auxiliary gas IIa, IIb is fed into the line.
• An oxygen-containing gas 5a, 5b and a moderating gas 6a, 6b, with which the gasification parameters are influenced, are likewise fed into the burner.
• auxiliary gas IIa, IIb can alternatively be fed directly into the burner or into the fuel channel of the burner.
• Fig. 2 shows an alternative embodiment of the method.
• Density flow conveying 2 is directed in an arc in the vertical downpipe.
• an auxiliary gas 11 or a part of the moderation gas 6, for example CO 2 is fed into the gas introduction device 10 in order to reduce the delivery density and the fuel flow.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Feeding And Controlling Fuel (AREA)
• Hydrogen, Water And Hydrids (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (15)

Family Cites Families (20)

• 2008
  • 2008-12-17 DE DE102008063505A patent/DE102008063505A1/de not_active Withdrawn
• 2009
  • 2009-11-20 AU AU2009335360A patent/AU2009335360A1/en not_active Abandoned
  • 2009-11-20 UA UAA201108856A patent/UA103213C2/ru unknown
  • 2009-11-20 KR KR1020117013583A patent/KR20110094308A/ko not_active Application Discontinuation
  • 2009-11-20 US US12/998,918 patent/US20110277673A1/en not_active Abandoned
  • 2009-11-20 WO PCT/EP2009/008268 patent/WO2010075911A1/de active Application Filing
  • 2009-11-20 CA CA2747298A patent/CA2747298A1/en not_active Abandoned
  • 2009-11-20 RU RU2011129566/06A patent/RU2011129566A/ru not_active Application Discontinuation
  • 2009-11-20 AP AP2011005727A patent/AP2011005727A0/xx unknown
  • 2009-11-20 EP EP09760745A patent/EP2359060A1/de not_active Withdrawn
  • 2009-11-20 CN CN2009801504582A patent/CN102257322A/zh active Pending
  • 2009-11-20 BR BRPI0923040A patent/BRPI0923040A2/pt not_active IP Right Cessation
  • 2009-12-16 TW TW098143099A patent/TW201030138A/zh unknown
• 2011
  • 2011-06-02 CU CU20110125A patent/CU20110125A7/es unknown
  • 2011-07-13 ZA ZA2011/05161A patent/ZA201105161B/en unknown

Non-Patent Citations (1)

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