RU131138U1 - PSEUMATIC LAYER DRYER FOR DISPERSED MATERIALS - Google Patents

Abstract

A fluidized bed dryer for dispersed materials, which is a rectangular case divided by vertical partitions into a number of chambers, the last cooling chamber has blades with an adjustable angle, characterized in that more chambers work for heating, one works for cooling, and in chambers The drying process is carried out by air heated in heaters with different heating parameters in each of them, air enters through the supply pipes simultaneously under the gas distribution dividing gratings and into slotted channels equipped with windows through which air escapes and guiding chippers radially mated to the chamber wall, the slotted channels being staggered so that the chippers are located opposite the slotted channel windows.

Description

The utility model relates to the technology of drying dispersed materials and can be used in various sectors of the food industry, in particular, in sugar for drying pulp, as well as in the microbiological, chemical, pharmaceutical industries.

Drum dryers are known that are most widely used in sugar factories. They differ in size, shape, number of nozzles, actuator and seals, and some other design features. [Sapronov A.R. Technology of sugar production. M .: "Kolos", 1999. - S. 122-123]

The disadvantages of such dryers include: the use of flue gases as a coolant, drying of the material at a temperature of 800 ... 900 ° C, the combustion of small particles of pulp during the drying process.

This leads to the fact that beet pulp becomes unsuitable for obtaining pectin and dietary fiber from it.

The closest in technical essence and the achieved effect is a fluidized bed dryer for drying heat-sensitive dispersible materials [Patent RU 2286520. Decl. 05/05/2005. Publ. 10/27/06. Bull. No. 30. Authors: Shishatsky Yu.I., Zamaev SM], which is a rectangular apparatus, divided by vertical partitions into a number of chambers so that in one of them there is a process of heating with hot air passing through the heaters, and in others - the process of cooling drained air passing through dehumidifiers. Air enters through the supply ducts under the gas distribution grilles. Blades are installed in the last cooling chamber, the angle of which is adjustable.

The disadvantages are the low quality of the dried product, since at the junction of the chamber wall with the vertical partitions stagnant zones of the material are formed and therefore there is a high probability of their clumping and drying out; the complexity of the technical implementation of the prototype and the duration of the drying process; high energy consumption with oscillating heat supply (when heating the coolant after a cooling period).

The technical task of the utility model is to simplify the technical implementation of the invention, reduce energy costs for drying, intensify the drying process, improve the quality of the finished product.

The technical problem of the utility model is achieved by the fact that in a fluidized bed dryer for dispersed materials, which is a rectangular casing, divided by vertical partitions into a number of chambers, blades with an adjustable angle are installed in the cooling chamber, new is that more chambers work for heating , one works for cooling, and in the heating chambers, the drying process is carried out by air heated in air heaters, with different heating parameters in each of them, air enters through odyaschim nozzles simultaneously and under the gas-distributing grating in slotted channels equipped with guide baffles, conjugated with the radial wall of the chamber and exits through slotted channels windows staggered so that the deflectors located opposite the windows slotted channels.

The technical result of the utility model is to improve the quality of the finished product, intensify the drying process, reduce energy costs for drying and simplify the technical implementation of the utility model.

1 shows a fluid bed dryer for particulate materials.

The fluidized bed dryer for dispersed materials is a rectangular case divided by vertical partitions 1 into a number of chambers 2 so that in all chambers there is a process of drying with hot air passing through heaters 3, and in the last chamber 4 there is a process of cooling with cold air. The number of heating chambers and drying parameters depend on the initial moisture content of the material and the parameters of the drying agent. A coolant with parameter values from minimum to maximum or vice versa, depending on the thermal lability of a particular material, enters each chamber. Thus, a stepwise drying mode is organized. In the cooling chamber mounted blades 5 with an adjustable angle. Air enters through the nozzles 6 under the gas distribution grilles 7 and simultaneously into the slotted channels 8 equipped with chippers 11 through the nozzles 9. The slotted channels serve as heating surfaces that intensify the drying process, since they are sources of radiation-conductive heat transfer - heat transfer due to the joint transfer of heat by radiation and thermal conductivity. The dried material passes sequentially through the drying chambers 2, and then through the cooling chamber 4, the slotted channels are staggered so that the chippers are located opposite the windows of the slotted channels.

The dryer operates as follows.

Hot air is supplied through the nozzles 6 to the drying chambers 2 under the gas distribution grills 7 and through the nozzles 9 to the slotted channels 8 equipped with chippers 11. The source material is continuously fed through the loading nozzle into the first drying chamber 2 in the direction of the material movement, is liquefied by the upward air flow and moves on the gas distribution grid 7 sequentially through all the drying chambers. The directional movement of the material and the elimination of the formation of stagnant zones in all drying chambers is facilitated by the coolant leaving the slotted channels 8 with chippers 11 through the windows 10. In the cooling chamber 4, the material is cooled by cold air, while the speed of movement of the material is controlled by changing the angle of inclination of the blades 5.

The proposed fluidized bed dryer for dispersed materials allows:

- improve the quality of the finished product,

- intensify the drying process,

- reduce energy costs for drying,

- simplify the technical implementation of the utility model.

Claims (1)

A fluidized bed dryer for dispersed materials, which is a rectangular case, divided by vertical partitions into a number of chambers, the last cooling chamber has blades with an adjustable angle, characterized in that more chambers work for heating, one works for cooling, and in chambers the heating process is carried out by air heated in heaters with different heating parameters in each of them, air enters through the supply pipes simultaneously under gas distribution dividing gratings and into slotted channels equipped with windows through which air escapes and guiding chippers radially mated to the chamber wall, the slotted channels being staggered so that the chippers are located opposite the slotted channel windows.

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