PL150412B1 - Apparatus for producing a pulsatory fluidized bed with whirls - Google Patents

Description

REPUBLIC PATENT DESCRIPTION 150 412 POLAND Additional patent to patent no --- Reported: 87 04 24 / P. 265382 / Priority Int. Cl. ⁵ BOIJ 8/38 ▼ OFFICE PATENT Application announced: 88 11 1 o RP The patent description was published: 90 07 31

Inventor of the invention: Zbigniew Gawrzyński

The holder of the patent: Akademia Ekonomiczna im. Oskar Lange, Wrocław / Poland /

DEVICE FOR THE CREATION OF A FLUIDING FLUID LAYER WITH SWIVELING IN THE WORKING CHAMBER

The subject of the invention is a device for the production of a pulsating fluidized layer with swirling bed in the working chamber. This device is used to carry out the process of heat and mass exchange in the gas-fragmented solid phase system. A device for the production of a pulsating fluidized layer is known, for example from the Polish patent specification No. 103 840, which includes in the upper part of the body an inlet and outlet stub pipe, as well as a gas outlet stub, and in the lower part of the body it has at least two thrust chambers formed by by a sieve plate, side walls and at least one baffle, the chambers' spaces communicating with the respective gas divider channels. The upper body part is separated from the lower body part by a horizontal or slightly inclined screen plate. The gas distributor is an integral part of the device and consists of a stationary element provided with gas outlet channels and ports with at least one gas inlet tap, and a rotating element with at least one through-hole or a set of movable valves. In this device, the gas with a constant volumetric flow rate, supplied by a fan to the gas distributor, is cyclically directed to successive pressure chambers closed at the top with a sieve plate. Above the sieve plate, the gas comes into contact with the fragmented solid phase, causing the particles to oscillate and move them in a circular motion in the vicinity of individual pressure chambers.

The disadvantage of the device for producing the pulsating fluidized bed according to the PRL patent description No. 103 840 is the low intensity of mixing the particulate solid phase in the zones between the individual pressure chambers. For example, when the apparatus is used as a dryer, this causes an uneven drying speed of the solid phase particles, thus reducing the intensity of the process and deteriorating the quality of the dried material. The device according to the invention is shaped like a cylindrical column with a material inlet port and a gas outlet port at the top

150 412 of the column and a gas inlet port in the lower part of the column, as well as a container with a material outlet port, the upper and lower parts of the column being separated by a sieve plate, is equipped with a rotary gas distributor located directly under the sieve plate. The gas distributor has the shape of a horizontal disk with at least one through-hole.

The rotation of the gas distributor causes the gas stream to cyclically move to the successive sections of the sieve plate on which the granular material rests. The pulsating gas stream in contact with the granular material creates a pulsofluid system with oscillating particle motion. The rotation of the horizontally arranged gas disc distributor with an appropriately shaped through-hole causes the occurrence of circumferential forces causing the bed to swirl. The occurrence of the swirling motion in the pulsating bed increases the degree of mixing and thus increases the intensity of the process and improves the quality of the product.

The device according to the invention is shown schematically in the embodiment in the drawing, in which Fig. 1 shows a section of a drought or a cooler for fragmented material, while Fig. 2 shows an example of a gas distributor. The device according to the invention is a cylindrical column 1, equipped in the upper part with a particulate material outlet 4 and a gas outlet port 2, and in the lower part a gas inlet port 8 and a material outlet port 10. Between the upper and lower part there is a sieve plate 6, which in the middle The part has an opening passing into the discharge channel 11, connecting the working chamber 5 with the hopper 9, cooperating with the discharge valve 3. In the pressure chamber 12 there is a disc gas distributor 7 with at least one through-opening 13, located directly under the sieve plate 6. The disc gas distributor is a rotary unit with a speed regulated amount of up to 1000 rpm.

The shredded material is fed to the working chamber 5 through the inlet stub pipe 4, with the discharge valve closed. through the sieve plate, the pulsating gas stream comes into contact with the fragmented solid phase, creating a pulsofluid system with oscillating particle motion and concentric swirling of the bed, and then exits through the outlet port 2 outside the apparatus. After the heat or mass exchange process between the gas and the solid phase is completed, the particulate material is removed from the working chamber 5, with the bleed valve 3 open, through the bleed channel 11 to the hopper 9, and then through the outlet 10 out of the apparatus.

Claims (1)

Patent claim A device for producing a pulsating fluidized layer with swirling the bed in the working chamber, equipped in the upper part of the cylindrical column with a material inlet port and gas outlet port, and in the lower part of the column, a gas inlet port and a container with a material outlet port, the upper and lower parts of the column are separated a sieve shelf, characterized in that directly below the sieve shelf / 6 / there is a rotary gas distributor / 7 / in the shape of a horizontal disc with at least one through-hole / 13 /. 150 412 .1. 150 412 Printing House of the Polish Patent Office. Circulation 100 copies Price 1500 PLN