SU1702130A1 - Spray dryer - Google Patents

Abstract

The invention relates to a drying technique and can be used in the chemical and related fields of industry. The purpose of the invention is to intensify the drying process. The spray dryer contains a gas supply device, made of at least three concentrically arranged and height-adjustable sections with guide elements inside, forming a cone with a opening angle of 90-120 ° C at the apex. and independent adjustment of this angle in each section. 1 з.п f-ly, 3 silt

Description

This invention relates to a drying technique and can be used in the chemical and related industries.

The purpose of the invention is to intensify the drying process,

Figure 1 presents the dryer, a General view; figure 2 - gas distribution device, a longitudinal section; on fig.Z - the same, top view.

The dryer contains a cylindrical chamber 1 with a conical bottom, a centrifugal saw 2 mounted along the axis of the chamber, and a gas supply device 3 located below it, consisting of three concentrically arranged and height adjustable sections 4-6 with guide elements inside that form a cone with apex open angle 90-120 ° and independent adjustment of this angle in each section.

In the central section 4, the guide elements are made in the form of spiral vortexes 7, and in perforated sections 5 and 6, in the form of blades 8 and 9, respectively. The dryer also has a nozzle 10 and outlet 11 of the coolant and the output of the dry product 12.

The dryer works as follows. The initial wet material is dispersed in the drying chamber 1 by a centrifugal atomizer 2 and is subjected to convective drying in a gaseous heat carrier stream, which is supplied through a gas supply device 3 by three independent streams, ensuring active mixing and all-supporting drops (particles) of the dried material coolant and thereby highly efficient spray drying process. During the drying process, particles of material are formed from the droplets, which move in the volume of the drying chamber in a downward spiral. Increasing the angle of opening of the guiding elements of the gas supply device 3 in the specified range provides a shortening

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extension of the mixing zone with the coolant.

The dried particles are deposited on the conical bottom of the dryer and discharged through pipe 12, and the exhaust gaseous coolant is discharged through pipe

eleven.

Formula 1: Spray dryer containing a cylindrical chamber with a conical bottom, an atomizer mounted along its axis and a gas supply device located underneath it, inlet and outlet connections

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heat carrier and dry product outlet, characterized in that, in order to intensify the drying process, the gas supply device consists of at least three concentrically arranged and height-adjustable sections with guide elements inside, forming a cone at the top with an opening angle of 90-120 ° and independent adjustment of this angle in each section.

2. A dryer as per 1, characterized in that the central section is provided with a spiral swirler.

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product entry

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Claims (2)

Claim 1. A spray dryer containing a cylindrical chamber with a conical bottom, a nozzle mounted along its axis and a gas supply device placed under it, pipes for supplying and discharging a heat carrier and for outputting a dry product, characterized in that, in order to intensify the drying process, the gas supply device consists of at least a mere of three concentrically arranged and height-adjustable sections from the direction. elements inside, forming at the apex a cone with an opening angle of 90 -120 ° and an independent adjustment of this angle 0 in each section. 2. The dryer according to claim 1, characterized in that the central section is equipped with a spiral swirl. entrance Figure 1 Figz Compiled by V. Burov Editor M. Petrova Tehred M. Morgenthal Corrector T. Paly Order 4532 Circulation Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035. Moscow. Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant Patent, Uzhgorod, Gagarin St. 101