Siemens Aktiengesellschaft

Heidrun Toth

Manfred Schingnitz

Volker Kirchhübel

Frank Hannemann

Norbert Fischer

Tino Just

Friedemann Mehlhose

Christian Reuther

Manfred Jänig

André Herklotz

Volker Kirchhuebel

An apparatus for a three-stage cooling and scrubbing system for the treatment of hot crude gases and liquid slag downstream of an entrained flow gasification. Crude gas and slag are firstly cooled and prescrubbed in a first stage by injection of water from ring and/or wall nozzles into a free quench space. Crude gas and slag are then fed together with excess water into a waterbath as a second stage before intensive spraying is once again carried out as a third cooling and scrubbing stage in an annular space.

Cooling and scrubbing of a crude gas from entrained flow gasification

Separation of dust in a quenching device arranged downstream of an entrained-flow gasification system is increased by a baffle with a double deflection system for deflecting the crude gas at approximately 180&#xb0; angle. An additional spraying element is provided. The arrangement can be single-sided or double-sided, or can include an additional weir.

Quenching system for cooling and cleaning dust-conducting crude gasification gas

In a reactor for the gasification of solid and liquid fuels in the entrained flow at temperatures between 1200 and 1900&#xb0; C. and pressures between ambient pressure and 10 MPa with an oxidizing agent containing free oxygen, the cooling screen is connected in a gas-tight manner to the pressure shell via a bellows compensator to accommodate linear deformation. Continuous sweeping by gas of the annular gap between pressure shell and cooling screen is unnecessary and backflow by producer gas is prevented.

Entrained-flow gasifier with cooling screen and bellows compensator

In a reactor for gasification of entrained solid and liquid fuels at temperatures between 1,200 and 1,900&#xb0; C. and at pressures between ambient pressure and 10 MPa using an oxidizing agent containing free oxygen, the cooling screen is connected to the pressure shell in a gastight manner via a sliding seal in order to allow length changes. Continuous gas purging of the annular gap between pressure shell and cooling screen is unnecessary and gasification gas is prevented from flowing behind.

Entrained-flow gasifier with cooling screen and sliding seal

An entrained bed gasifier for operation with particulate or liquid fuels is provided. A reaction chamber defined by a cold screen and a quenching chamber connected to the reaction chamber using a crude gas and slag outlet, wherein at least the cold screen is enclosed by a pressure-resistant pressure mantle. The annular gap between the cold screen and pressure jacket may be filled with a fluid, for example, water or heat transfer oil. A rough pressure equalization between the gasification chamber and the annual gap may be guaranteed using a connection between the annular gap and the quenching chamber or the crude gas line, hence the pressure in the gasification chamber normally remains slightly higher than in the inner water jacket.

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Freiberg, Germany

Heidrun Toth