SU392966A1 - BOILER LAYER APPARATUS - Google Patents

Description

one

The invention relates to apparatus for carrying out chemical processes and can be applied for the regeneration of coke-like catalysts.

A fluidized bed apparatus is known, comprising a housing within which gas distribution grids with overflow pipes and devices for supplying a fluidizing agent and material are placed.

The purpose of the invention is to control the level of the fluidized bed.

For this, the overflow pipe in the upper part is made in the form of a cone with slits and placed in a glass equipped with an aerating device.

In the drawing, the proposed apparatus is schematically depicted.

The apparatus consists of a housing 1, inside of which gas distribution grids 2 are placed with overflow pipes 3 and 4 and a device 5 for feeding a coked catalyst, above which a reflector 6 is installed, attenuating the flow of a stream of aerated catalyst. The overflow pipes 5 and 4 in the upper part are made in the form of a cone with slits, while the overflow pipe 3 is placed into the glass 7, inside which the aerating device 8 is installed. Above the glass 7, the reflector 9 is installed on the pipe 3. The supply of primary air blowing

directly below the lower grille 2. The secondary air blowing is carried out through the mother liquor 10, which can be located either under the upper grille or under the lower grille.

In order to trap the dust carried away by the gas stream from the fluidized bed, cyclone dust collectors are provided in the upper part of the regenerator // with the trapped catalyst dust returned to the fluid bed. At the upper lattice, it is necessary to maintain a sufficiently high temperature, since 50-85% of coke is in this first zone. Accordingly, the volume of the first zone should be large enough. In the second grid (second zone), the rest of the coke is burned, but not burned in the first zone. Since the catalyst entering the second zone is already heated to the maximum allowable temperature, all the heat released in the second zone must be removed through the cooling coils, therefore the introduction of the latter into the fluidized bed of the second zone is necessary.

Subject invention

The fluidized bed apparatus, comprising a housing inside of which gas distribution grids with overflow pipes are placed

And devices for feeding a fluidizing agent and material, characterized in that, in order to regulate the level of the fluidized bed,

The top of the white tube is made in the form of a cone with slits and placed in a glass equipped with an aerating device.