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Method and device for the entrained-flow gasification of solid fuels under pressure

A solid fuel and entrained bed technology, applied in fixed bed gasification, mechanical details of gasification devices, granular/powder fuel gasification, etc., can solve problems such as technical infeasibility

Inactive Publication Date: 2013-07-10
NORTH KADMI-FREIBERG UNIV OF TECH
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  • Abstract
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Problems solved by technology

At least for the reasons stated, the process concept proposed by DE 26 40 180 B is not technically feasible

Method used

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  • Method and device for the entrained-flow gasification of solid fuels under pressure

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Embodiment Construction

[0039] figure 1A gasification reactor 1 with an internal circulating entrained flow bed is shown in a highly simplified diagram. The gasification chamber 3 of the gasification reactor 1 for entrained bed gasification is surrounded by a cylindrical pressure vessel 4 consisting of an outer pressure jacket 5 , a water chamber 6 and an inner jacket 7 . The inner casing 7 is added stud material and plated with refractory material as a ceramic protective cover. The feed gas outlet 8 is located at the upper end of the entrained bed gasifier 1 and the bottom product outlet 9 is located at the lower end, wherein only the upper profile of the rotary grate 10 is shown in the figure. An entrained bed 11 of internal circulation is formed above the surface 12 of a moving bed 13 . On the plane 14 of about 1 meter height above the surface 12 of the moving bed 13, two dense phase flow introduction feed nozzles 15 for powdery dry lignite 2 and 6 for inputting the first gas are arranged to be ...

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Abstract

The invention relates to a gasification reactor (1) and associated method for the entrained-flow gasification of solid fuels under pressure. The reactor essentially consists of a pressure vessel (4) that can be cooled and an inner jacket (7) that is equipped with a heat shield. At least one crude gas outflow (8) is located at the upper end of the cylindrical pressure vessel and at least one bottoms withdrawal outlet (30) is located at the lower end, the pressure vessel having at least enough space for a moving bed (13), an entrained flow (11) that circulates internally above the surface of the moving bed and a buffer zone (3) situated above said entrained bed. Feed connections for the solid fuels (15) and gasification agent nozzles for the supply of first gasification agents (16) are situated at a height of between approximately 1 and 3 meters above the surface of the moving bed, said gasification agent nozzles being designed to inject the first gasification agents into the entrained flow in such a way that a hot central upward flow and a "cold" downward wall flow are formed. At least one feed device for second gasification agents (28) is located at the bottoms withdrawal outlet.

Description

technical field [0001] The invention relates to a method and device for gasifying solid fuel in an air-flow bed under pressure. Background technique [0002] In the known entrained entrained gasification process, powdered carbon-containing (C-containing) fuel is converted into gasification product feed gas and residue by means of a gasification agent mainly composed of oxygen at a temperature above the ash flow point. In order to melt the ash, very high temperatures are required in the gasification chamber. Depending on the ash pour point, this temperature is approximately 1400 to 1600°C. At this high temperature, feed gas and residue must be conducted at the outlet from the entrained bed gasifier. Compared to a gasification process such as a fluidized bed gasification, which operates at a temperature of approximately 400 to 600 K lower feed gas outlet temperature, the specific oxygen demand for pulverized fuel is approximately 20% to 20% higher. 30%. The use of fuels ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/76C10J3/48C10J3/42C10J1/213
CPCC10J3/78C10J3/485C10J2200/09C10J3/42C10J2300/0916C10J2300/093C10J2300/0956C10J3/466C10J2300/0973Y02P20/129
Inventor 贝恩特·迈尔彼得·塞弗特斯特芬·科拉匝可希尔科·奥格里塞克哈迪·劳赫富斯马蒂亚斯·里格尔迈克尔·特洛姆佩尔特斯特凡·古尔
Owner NORTH KADMI-FREIBERG UNIV OF TECH
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