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Cooling screen with variable pipe diameter for high gasifier power

A technology of cooling hood and gasification furnace, which is applied in the direction of gasification process, manufacture of combustible gas, and mechanical details of gasification device, etc. It can solve the limitation of application range and performance of cooling hood, heat of cooling hood, short service time of cooling hood, etc. question

Inactive Publication Date: 2019-04-16
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both aspects (i.e., greater stress and more thermal wear) lead to a potentially shorter lifespan of the cooling shroud
Therefore, due to the counter-effect of the changing tube wall thickness, the range of application and performance of the cooling jacket is limited by the strength of the cooling jacket and the amount of heat that can be dissipated

Method used

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  • Cooling screen with variable pipe diameter for high gasifier power
  • Cooling screen with variable pipe diameter for high gasifier power
  • Cooling screen with variable pipe diameter for high gasifier power

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Experimental program
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Embodiment Construction

[0017] According to the invention, thin-walled tubes 5 are applied in the area of ​​the highest temperature load, namely the cylindrical part of the cooling jacket, and in order to ensure mechanical strength in the conical area of ​​the cooling jacket (in the upper and lower parts), in particular for To absorb the bending moments generated by natural loads and pressure differences that arise, use thick-walled pipes3.

[0018] Furthermore, the tubes are selected such that the tube outer diameter remains constant over the entire cooling jacket height 8 and the tube wall thickness only varies over the tube inner diameter. Here, the transition from the smaller tube inner diameter to the larger tube inner diameter is smoothed by the gradually increasing diameter increase 4, so that a "wake region" is avoided in which the discontinuous flow due to characteristics and cannot ensure adequate cooling. Keeping the outer diameter of the cooling jacket tubes consistent enables uniform co...

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Abstract

For an entrained-flow gasifier for gasification of fuels in dust or liquid form using a gasifier agent containing free oxygen, at pressures between atmospheric pressure and 8 MPa and gasification temperatures between 1200 and 1900 DEG C, there is proposed a liquid-cooled cooling screen of which the cooling pipes in the central cylindrical section have thinner walls than the cooling pipes in the lower and upper conical sections. The invention provides a cooling screen design having sufficient strength under high pressure difference over the cooling screen wall, a pipe wall thickness which ensures reliable operation of the cooling screen and high heat throughput, and pressure equalization between the cooling screen gap and the reaction chamber under all operating circumstances.

Description

technical field [0001] The present invention relates to an entrained bed gasifier for the gasification of solid and liquid fuels at temperatures between 1200°C and 1900°C and at pressures between ambient pressure and 10 MPa (100 bar), where the solid fuel may be Coal, petroleum coke or other carbonaceous solid materials of different grades and ground into fine powder, and the liquid fuel can be oil-solid suspension or water-solid suspension, the entrained bed gasifier uses an oxidant containing free oxygen , wherein the cooling jacket 8 arranged in the pressure shell 15 delimits the reaction chamber 9 . Background technique [0002] In the entrained bed gasifier, the reaction chamber 9 with a high thermal load is formed by a cooling tube structure. Such a structure (the so-called cooling jacket 8 ) as a whole is pressure-stable only to a limited extent, the tubes themselves being designed to be pressure-resistant. The cooling jacket 8 is located in the pressure vessel 15 ....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/76C10J3/48C10J3/84
CPCC10J3/485C10J3/76C10J3/84C10J2200/09C10J2300/0959
Inventor F·哈内曼T·尤斯特N·费舍A·赫克洛茨H·托特
Owner SIEMENS AG