Gasification device with slag removal

Abstract

A device for the gasification of liquid or fine-grain solid fuel materials in an entrained bed reactor, at temperatures above the ash melting point and at a pressure of 0.3 to 8 MPa, including a gasification reactor and a water bath being arranged in a pressure vessel. The water bath being installed below the gasification reactor and the a / m gasification reactor being designed in such a manner that the synthesis gas produced is withdrawn in the upper section of the reactor, the liquid slag precipitating on the walls of the reactor chamber and then having a free downflow, without any solidification of the surface of the said slag. The lower side of the reaction chamber has an outlet opening with a drop-off edge so that the downstream of liquid slag can freely fall from the drop-off edge. A slag removal duct is arranged below the opening and reaches down into the water bath, the upper wall section of the slag removal duct is penetrated by a cooling agent and the internal side of the duct is completely lined with a temperature-resistant insulating compound. The lower section of the slag removal duct which reaches down into the water bath is wetted by a water film on the internal side, the upper and lower sections being connected with each other in such a manner that the water film of the upper wall section does not come into contact with the wall section penetrated by a cooling agent nor with the insulating compound.

Description

technical field [0001] The invention relates to a process for the gasification of particulate to ash-like fuels or liquid fuels to produce synthesis gas, that is to say comprising CO and H as main components 2 gas, wherein the residue is discharged from the gasification reactor in the molten liquid state and is solidified by cooling with water. Background technique [0002] In the treatment of finely divided fuels (such as dusty fuels composed of coal, petroleum coke, biowaste or biofuels) or liquid wastes (such as oils, tars, refining residues and other liquid residues) In the case of gasification, the residue appears in liquid form at temperatures above the ash melting point of the fuel used. The residue in the molten liquid state collects at the lower end of the gasification reactor and is discharged through the discharge opening. Here, as a rule, the molten residue falls into a water bath, where it is quenched and forms granules. Among them, a glassy material is forme...

AI Technical Summary

Problems solved by technology

On these surfaces, baked-on (verbackene) solid deposits form empirically in the above-mentioned cases, which eventually lead to operational disturbances

Furthermore, in the case of injecting water into the residue discharge standpipe, there is an increased risk of cooling the residue discharge opening due to the formation of moisture

Furthermore, the injection of water and the unlined membrane wall of the residue discharge standpipe results in an additional cooling effect on the residue discharge opening, which in the above-described embodiment is only achieved through the contact between the cooler surface and the water injection device. can be reduced by a sufficient distance between

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