SU775571A1 - Apparatus for heat treatment of solutions and suspensions - Google Patents

Description

The invention relates to a drying technique and may find wide application in the chemical, food and other industries.

An apparatus for heat treatment of solutions and suspensions in a fluidized bed of an inert nozzle, preferably a dryer, containing a gas distribution grid located above the last nozzle, tangential nozzles for introducing additional heat transfer fluid and a hollow insert tapering upwards and installed along the axis of chamber 1 is known.

The disadvantage of this apparatus is the relatively low degree of purification of the inert packing.

The purpose of the invention is to increase the efficiency of the separation process. Levid product from the nozzle.

This goal is achieved by the fact that the insert is made with open ends, and the nozzles are brought to its inner surface.

The insert is in the form of a truncated cone.

FIG. 1 shows an apparatus with a partial longitudinal section; on .fig. 2 is a section A-A in FIG. one.

The apparatus for heat treatment of the solutions and suspension in the Kipsian inert nozzle layer contains chamber 1. with gas distribution area 5 2 placed over the last nozzle 3, tangential nozzles 4 for additionally introducing heat carrier and hollow insert 5 narrowing upwards and installed along the axis of chamber 1, and insert 5 is made with open ends 6 and 7 in the form of a truncated cone, and the nozzles 4 are connected to its internal surface. The device works as follows.

When hot air is supplied from the fan through the gas distribution grid 2, a pseudo-liquefaction of the inert nozzle occurs. Filed

20 by the nozzle 3, the solution or suspension is intensively dried on the surface of the nozzle with the warmth of hot air, and the dried film is continuously chipped off.

25 nozzles of the nozzle due to friction and impact of particles between themselves and the walls of the chamber 1.

In order to intensify the purification of the inert pump through tangential

30. The nozzle 4 is supplied with air inside the insert 5. The insert is installed in the chamber 1 so that its larger end 6 is lowered into the fluidized bed. When tangential flow of air inside the hollow insert 5, there is an intensive rotation of the inert packing along the inside of the wall of the insert 5.

Thus, inert particles that fall into the zone of action of tangentially supplied air and are pressed intensively against the wall will be ejected through the larger end 6, intensively cleared from the dry product.

The dimensions of the inner insert 5 can be chosen so that with a relatively small expenditure of energy on the fan to provide intensive rotation of the inert nozzle inside the insert 5 and intensive cleaning of it.

The pulverized dry product (0.1 gO, 2 mm in size) pressed against the inner wall of the insert 5, having a small weight, a small speed of curvilinear motion due to braking in the boundary layer (against the wall) will be partially carried out into the cyclone through the end 7, as well as through the gap between the housing 1 and the end b. Thrown through the end 7 of an inert mass by centrifugal forces is thrown against the wall of the housing 1 and again returns to the fluid layer through the gap between the end b of the insert and the chamber 1.

Due to the effect of the air rotating in the insert 5, the uniformity of the fluidized bed, namely the destruction of the bladder and the improvement of the use of the drying potential of the air, etc., is greatly increased.

The efficiency of the apparatus proposed is that by placing a hollow, expanding upwardly hollow conical insert and tangential supply of heat carrier to it inside the drying chamber, the nozzle cleaning process is significantly intensified while reducing energy consumption for blasting. The uniformity of fluidization increases, emissions of an inert nozzle into the upper part of the drying chamber Kc1 can be completely eliminated.

Claims (2)

1. An apparatus for heat treatment of solutions and suspensions, in a boiling layer of an inert nozzle, mainly a dryer, containing a chamber with a gas distribution grid, placed above the last nozzle, tangential nozzles for introducing an additional heat carrier and a hollow insert tapering upwards and installed Along the axis of the chamber, characterized in that, in order to increase the efficiency of the process of separating the pulverized product from the nozzle, the insert is made with open ends, and the nozzles are led to its inner surface. 2. The device according to claim 1, is different from the fact that the insert is made in the form of a truncated cone. Sources of information taken into account in the examination 1. USSR author's certificate Q 445808. cl. f 26 B 17/10, 1974.