SU467761A1 - Apparatus for producing activated carbon in a fluidized bed - Google Patents

Description

one

 The invention relates to devices for the heat treatment of carbon-containing materials and can be used to produce active carbons.

A known apparatus for producing active carbons in a fluidized bed, consisting of a vertical casing, horizontal gas distribution grids, located at several levels, transfer pipes, pipes for supplying fuel, air and steam and removing active iron and vapor-gas products.

The purpose of the invention is to obtain high-quality coal and to increase the reliability of maintaining optimum hydraulic and thermal conditions.

For IT, under the top grille there is a positioning nozzle, and between this grille and the top level of the nozzle, the housing is provided with a air inlet.

The drawing shows the proposed apparatus ..

It consists of vertical. housing 1 with pipes 2-1О for the supply of raw materials, fuel, air, steam and

gases and removal of active carbon and steam-gas products, respectively.

Inside the housing are chambers 11-16 of combustion, activation, high-temperature carbonization, low-temperature carbonization, after-burning, substance, or preheating of the raw material, respectively.

A nozzle 17 is located in the lower part of the afterburning chamber for uniform and flameless combustion of combustible gases.

All chambers are separated by horizontal gas distribution grids i & connected by flow pipes 19 and made with dimensions decreasing in height,

In the afterburning chamber located under the grate of the drying chamber, a 2 O heat exchanger is installed to produce water vapor. - The device works as follows.

The feed through pipe 2 is fed to the drying or preheating chamber 16, where it is fluidized with hot gases coming from the chamber 15 to

osgani and thus subjected to the first stage of heat treatment at 1OO1500S.

The dried and heated material is fed through the overflow pipe 19 into the chamber 14 of low-temperature carbonization and is processed at 400-500 ° C. The pre-carbonized material is fed through the overflow pipe 19 into the high-temperature carbonization chamber 13, where it is finally carbonized at 75 ° -85 ° C. From the high-temperature carbonization chamber, the non-volatile material enters the activation chamber 12 through the transfer pipe 19 into the activation chamber 12, where it is subjected to activation by the vapor-gas mixture in the fluidized bed at 85 O-950 ° C. The finished activated carbon is withdrawn from the apparatus through nozzle 6. The vapor-gas mixture formed in the combustion chamber 11 is passed successively upwards through the chambers 12-14, and thereby the solid material found there is treated in a fluidization mode. From the carbonization chambers, and activation, a partial extraction of gases for recirculation and afterburning in chamber 11 is carried out,

When afterburning of the rest of the gases

In the chamber 15, the generated heat is used partly for drying or preheating the SFU in the chamber 16, and partly for producing steam in the heat exchanger 20 installed in this chamber. The resulting water vapor is supplied to the chamber 11 simultaneously with the combustible gases of active carbon and carbonation.

Subject invention

An apparatus for producing active carbons in a fluidized bed, consisting of a vertical body, horizontal gas distribution grids located at several levels, transfer pipes, pipes for supplying raw materials, fuel, air and steam and diverting active carbon and steam-gas products, characterized by that, in order to improve the quality of coal and the reliability of maintaining the optimum hydro-volcanic and thermal conditions, a nozzle is placed under the upper grate, and the casing is fitted with a nozzle between this grate and the upper level of the nozzle for supplying air.