US 11,578,280 B2Granted

Method for the treatment of granulated liquid slag in a horizontal furnace

OwnerPrakashkumar Narasimhamurthyinventor

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Abstract

Improvements to the gasifier furnace design and process method to facilitate continuous production of mainly H2, CO and granulated solid from molten liquid or the liquid slag in the presence of carbonaceous material. It is a method of quenching molten liquid and cooling post quenched hot granulated solid which is done within a long horizontal reaction chamber space of the furnace in the presence of C and H2O. A moving layer of continuously gas cooled granulated solid protects the moving floor underneath by substantially reducing the possibility of heat transfer from the horizontal reaction chamber to such moving floor and its parts and preventing direct contact between the post quenched hot solid granulates and such moving floor. Such moving floor having plurality of gas passages and is disposed above a plenum that receives gas from outside source and uniformly distributes the gas to pass through all the gas passages.

Claims1

Dependent claims

A method of recovering thermal energy from a molten slag in a horizontal furnace with a moveable floor comprising:

spreading a cold slag across length and breadth of the moveable floor to form a first layer on the moveable floor;
spreading a carbonaceous material on top of the first layer to form a second layer;
introducing the molten slag into the furnace and dividing the molten slag into smaller streams;
spraying a quenchant to perform combined actions of fragmenting the smaller streams of the molten slag into a granulated solid slag and quenching the granulated solid slag to generate a horizontal draft gas;
spreading the granulated solid slag over the second layer to form a third layer;
and
injecting a reactant gas from below the movable floor to create a upward draft reactant gas by the reactant gas reacting with the first, second and third layer;
wherein the horizontal draft gas and the upward draft gas combine to increase residence time of the gases in the horizontal furnace for higher recovery of thermal energy from the molten slag.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/651,415Filed 8 Oct 2018
Priority: GB 17164447 Oct 2017
Published: US 2020/0291313 A117 Sep 2020
Granted: 14 Feb 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification24 codes

C10J 3/002
Production of combustible gases containing carbon monoxide from solid carbonaceous fuels: horizontal gasifiers, e.g. belt-type gasifiers
C01B 3/061
By reaction of inorganic compounds containing electro-positively bound hydrogen with inorganic reducing agents: by reaction of water with metal oxides
C10J 3/57
Production of combustible gases containing carbon monoxide from solid carbonaceous fuels: gasification using molten salts or metals
C10K 3/026
By catalytic treatment: increasing the carbon monoxide content, e.g. reverse water-gas shift [RWGS]