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Gasification of a carbonaceous material

A technology of gasifier and pressurized gasification, which is applied in the direction of granular/powdered fuel gasification, gasification process, fixed bed gasification, etc., and can solve the problem of low energy efficiency

Inactive Publication Date: 2012-07-04
SASOL TEKHNOLODZHI PROPRIEHJTEHRI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In short, in many integrated coal-to-liquids facilities, the water vapor and oxygen pressures are mismatched, where the water vapor pressure is significantly higher than the oxygen pressure, resulting in an energy inefficient operation
It is not desirable to reduce or reduce this energy efficiency

Method used

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  • Gasification of a carbonaceous material
  • Gasification of a carbonaceous material
  • Gasification of a carbonaceous material

Examples

Experimental program
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Embodiment

[0072] Table 1 reflects as figure 1 The conventional gasifier in this field (basic case) is shown as figure 2 The difference in operation is shown between two simulated cases (case A and case B) of a gasifier operating in accordance with an embodiment of the present invention.

[0073] Case A reflects the method of operating the gasifier by applying a pressure increase to the oxygen supplied to the steam injector by the steam injector. Case B reflects that by maintaining the gasification vessel of the gasifier at its design operating pressure or operating the gasification vessel at this pressure while reducing the supply pressure of oxygen to the gasifier compared to before the gasifier modification The method of operating the gasifier with the supply pressure of the steam injector.

[0074] Table 1

[0075]

[0076] Estimate the oxygen pressure increase by describing and predicting FBDB TM A proprietary simulation model of the operation of the gasifier and associate...

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Abstract

A method of operating a pressurized gasifier (100) includes feeding a carbonaceous material (21) into a pressurized gasification vessel (14) of the gasifier (100) where the gasification vessel is at a pressure P1. Steam (22) as a temperature moderating and gasification agent is fed through a steam ejector (102) into the gasification vessel (14), the steam entering the ejector (102) at a pressure P2 and acting as a motive fluid for the steam ejector (102). Oxygen (24) is also fed into the gasification vessel through the steam ejector (102), the oxygen entering the steam ejector (102) at a pressure P3, where P2 > P1 => P3. The carbonaceous material is gasified in the presence of steam and oxygen at the pressure P1 to produce ash and synthesis gas which includes at least CO and H 2, with ash (23) and synthesis gas (25) being removed from the gasification vessel.

Description

technical field [0001] The present invention relates to the gasification of carbonaceous materials. In particular, the present invention relates to a method of operating a pressurized gasifier, an improved method of a pressurized gasifier using water vapor and oxygen, a method of operating a gasifier improved according to the invention, and a pressurized gasifier. Background technique [0002] A variety of pressurized gasifiers are known in the art, and it is recognized that for pressurized gasifiers, higher operating gasification pressures generally increase the capacity of the gasifier. Pressurized gasifiers typically use a gasification agent that includes a mixture of oxygen and high-pressure steam (often from a steam collector and generated within the jacket of the gasifier itself). Typically, high pressure water vapor is available at a water vapor pressure higher than the oxygen pressure, so the gasification agent pressure limit is the oxygen pressure available at the ...

Claims

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Application Information

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IPC IPC(8): C10J3/16C10J3/20C10J3/56C10J3/54C10J3/72
CPCC10J2300/093C10J3/20C10J2200/152C10J3/72C10J3/78C10J2200/156C10J3/02C10J3/16C10J3/06C10J3/723C10J2300/0976C10J2300/0959
Inventor 维尔纳・西格弗里德・厄恩斯特
Owner SASOL TEKHNOLODZHI PROPRIEHJTEHRI LTD
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