SU951034A1 - Spray-type dryer - Google Patents

Description

This invention relates to a spray drying technique for liquid and pasty products and can be used in the chemical, food and other industries.

A spray dryer is known, comprising a cylindrical body with a flat bottom, on which is located a fairing, a nozzle for introducing a material to be dried and nozzles for introducing a heat carrier and discharging it with a dried vapor product; In order to intensify the drying process, in the lower part of the dryer body there are pairwise and diametrically disposed connecting pipes, one of which in each pair is connected to a hot stream pulsing with a frequency of 120-150 Hz.

The disadvantage of this spray dryer is the possibility of the formation of deposits of material in the outlet pipe of the spent heat carrier and the dried material.

Closest to the invention to the technical essence and the achieved result is also a spray dryer comprising a cylindrical body with a conical bottom and a cap fairing located in the bottom zone with a branch pipe under it discharging the spent heat carrier 2j.

The disadvantage of this dryer is the possibility of the formation of deposits of material on the fairing and in the nozzle.

The purpose of the invention is to prevent the formation of deposits of material on the fairing and in the nozzle.

The goal is achieved by the fact that the nozzle of the spent heat carrier is equipped with a shock-blast wave generator, the output nozzle of which is directed oppositely to the flow of the spent heat carrier.

The cap fairing is mounted with the possibility of vertical movement,.

FIG. 1 shows a spray dryer, a general view; figure 2 - node 1 in figure 1; on fig.Z - section A-L in figure 2.

The spray dryer contains a cylindrical body 1 with a conical bottom 2, a cap fairing 3, an inlet nozzle 4 and a nozzle 5 for discharging heat carrier, an unloading nozzle 6

cyxdro material, nozzles 7 for spraying a wet material, generator 8 of shock-blast waves (SWC), device 9 for fastening the cap fairing 3.

Spray dryer works as follows.

The liquid material in the direction of arrow a is fed into the nozzles 7 and is sprayed. The material is dried by gas combustion products supplied along the arrow C to the internal volume of the dryer through pipe 4. The dried product through the annular gap between the conical bottom 2 and the cap fairing 3 and then through pipe 6 is discharged from the dryer. The exhaust coolant through the pipe 5 is removed from the dryer.

The generator 8 UEV included in the operation mode, the choice of which is avisit on the composition of the material entering the drying. The generator operates on a stoichiometric mixture of fuel and air Generated during the exhaust of the generator 8, the combustion products and the blast wave clean the coolant outlet pipe 5, the cap fairing 3, and the conical bottom 2 from the resulting deposits of material. The output nozzle of the generator 8, it is advisable to install at an angle of 3-40. Cap Fairing

3 has the ability to move vertically to a height of 1-5 cm. Moving more than 5 cm is irrational due to possible distortions and seizure.

Claims (2)

1. Spray dryer containing a cylindrical body with a conical bottom and a cap fairing with an exhaust coolant outlet located beneath it, which is equipped with a generator to prevent the formation of deposits of material on the fairing and in the branch pipe. -explosive waves, the exit nozzle of which is directed oppositely to the flow of the spent coolant. 2. Dryer according to claim 1, characterized in that the cap fairing is installed with the possibility vertical movement. Sources of information taken into account in the examination 1. The patent of England No. 1150406, cl. F 26 B 3/10, published. 1969. 2. Authors certificate of the USSR 507754, cl. F 26 B 3/12, 1973. Sofffta phage.2 (rig. 3