Method and device for producing synthesis by partial oxidation of slurries made from fuels containing ash with partial quenching and waste heat recovery

Inactive Publication Date: 2007-03-08
SIEMENS AG
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  • Application Information

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Benefits of technology

[0012] It is therefore an object of the invention to provide a gasification method that takes int

Problems solved by technology

This degree of purity is still inadequate for carrying out sub

Method used

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  • Method and device for producing synthesis by partial oxidation of slurries made from fuels containing ash with partial quenching and waste heat recovery
  • Method and device for producing synthesis by partial oxidation of slurries made from fuels containing ash with partial quenching and waste heat recovery
  • Method and device for producing synthesis by partial oxidation of slurries made from fuels containing ash with partial quenching and waste heat recovery

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Example

[0022] 320 tons / hour of bituminous coal with a composition of C71.5 wt. % H4.2 wt. %O9.1 wt. %N0.7 wt. %S1.5 wt. %Cl0.03 wt. %, 

an ash content of 11.5 wt. %, and a moisture content of 7.8 wt. %, is to be gasified at a pressure of 40 bar. The calorific value of the coal is 25,600 kJ / kg. The gasification takes place at 1,450° C. 245,000 m3 (standard) / h of oxygen is needed for the gasification. The coal is first fed to a state-of-the-art grinder in which it is pulverized to a grain size range between 0 and 200 μm, and is then mixed in a special system 1 according to FIG. 1 with water with added surfactants to make a stable coal dust in water suspension, the so-called slurry. The solids concentration in this slurry is 63 wt. %, and the amount of slurry is 485 tons / hour. The slurry is brought to the desired gasification pressure of 100 bar by means of a pump suitable for pumping solid-liquid suspensions, and is fed to the burner of the gasification reactor 2 of FIG. 1 through the suppl...

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Abstract

A method and a device for the gasification of solid fuels such as bituminous coal and coke such as bituminous coal, lignite, and biomass, as well as petroleum coke, that are finely ground and mixed with water or oil to make fuel-liquid suspensions, so-called slurries, and their gasification together with an oxidizing medium containing free oxygen by partial oxidation at pressures between atmospheric pressure and 100 bar, and at temperatures between 1200 and 1900° C., in an entrained flow reactor. The method includes the steps of slurry preparation and infeed to the reactor, gasification in an entrained flow reactor with cooled reaction chamber contour, partial quenching, waste heat recovery, and wet or dry dust separation, with the crude gas being pretreated so that it can be fed to other technological steps such as crude gas conversion or desulfurization.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This invention relates to a gasification method and a device for implementing the method. The method consists of the process steps of slurry preparation, fuel infeed, gasification reaction, partial quenching, gas scrubbing, and partial condensation. Gas scrubbing and partial condensation can be replaced by mechanical dust separation, to produce gases containing CO and H2 by partial oxidation of powdered fuels containing ash with a gasification medium containing free oxygen, at high temperatures and elevated pressure. [0003] To achieve long operating times, the pressurized jacket of the gasification reactor has to be protected reliably against the action of crude gas and against the high gasification temperatures of 1200-1900° C. This is done by confining the reaction or gasification chamber with a cooled tubular shield that is hung in the pressurized jacket. The annular gap between tubular shield and pressurized jac...

Claims

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Application Information

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IPC IPC(8): C10J3/00
CPCC10J3/526C10J3/84C10J3/845C10J3/86C10K1/101C10J2300/0903C10J2300/0973C10J2300/0983C10K1/04C10J2200/09Y02P20/129
Inventor SCHINGNITZ, MANFREDMEHLHOSE, FRIEDEMANNBERGT, TORSTEN
Owner SIEMENS AG
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