Entrained bed gasifier with a cold screen and internal water jacket
View Patent ↗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.
1. A reactor for the gasification of solid and liquid fuels in the entrained bed, comprising:
a cooling screen;
a gasification chamber circumscribed by said cooling screen;
a pressure mantle; and
a quenching chamber positioned downstream of said gasification chamber configured to receive and quench raw gas produced in the gasification chamber,
wherein the reactor operates at temperatures between 1,200 and 1,900° C. and pressures between ambient pressure and 10 MPa,
wherein the solid fuels include particulate crushed coal with different coalification degrees, petrol coke or other solid coal-containing materials and liquid fuels, oil or oil-solid or water-solid suspensions,
wherein an oxidation means includes free oxygen,
wherein an annular gap between the pressure mantle and the cooling screen is used as an internal water jacket filled with a liquid, and
wherein the internal water jacket is connected with the raw gas line exiting the quenching chamber by way of a steam drum, thus performing a pressure corn sensation between the internal water jacket and the gasification chamber.
2. The reactor as claimed in claim 1 , wherein a first pressure may be established in the internal water jacket, which is higher than a second pressure in the gasification chamber.
3. The reactor as claimed in claim 1 , wherein the first pressure may be established in the internal water jacket, which is identical to or greater than the second pressure in the gasification chamber.
4. The reactor as claimed in claim 1 , wherein, water may be injected into the raw gas line exiting the quenching chamber using a nozzle.
5. The reactor as claimed in claim 1 , wherein the liquid that the internal water jacket is filled with is water or heat transfer oil.