RU2005971C1 - Chamber for drying dispersive materials - Google Patents

Abstract

FIELD: food industry. SUBSTANCE: chamber has cylindrical case provided with open top section and coupled with a system for supply of drying agent, cylindrical shell mounted to define a space from the agent, tangential branch pipes for supplying material to be treated and introduced into inner space of the shell, vanes for controlling supply of drying agent arranged at the top part of the shell and mounted for rotation about an axis perpendicular to longitudinal axis of the case. The tangential branch pipes and ring gap, which is formed by top part of the case and shell, are provided with gates. EFFECT: enhanced efficiency. 3 dwg

Description

 The invention relates to equipment for drying dispersed materials, for example grains, and can be used in various industries, in particular in food.

 A known installation for processing grain, which contains a device for drying pre-moistened grain and a centrifugal peel. In addition, it is equipped with a cyclone connected to the atmosphere and connected to the drying device by a heater and a pipe connected to it, connected to the outlet of the scrubber, while the boot opening of the scrubber is connected directly to the outlet of the device for drying.

 A disadvantage of the known installation is the inability to intensify the drying process by changing the swirl of the hot air stream (fuel combustion products), which determines significantly the dimensions and weight of the installation, and its metal consumption increases.

 A known chamber for drying dispersion materials, comprising a cylindrical body with tangential nozzles for introducing a drying agent and a processed material, blades for regulating the supply of a drying agent, an unloading nozzle.

 The disadvantages of this drying chamber are as follows.

 The plates (blades) are located in the lower part of the gas distribution channel and do not allow you to adjust the degree of swirling flow, therefore, do not allow to intensify the heat transfer process.

 The material thrown to the wall forms a thick annular rotating layer, which is pierced by jets of gas exiting through the tangential nozzles, has significant hydraulic resistance, overcoming which the energy of the gas flow is expended, the pressure loss of the drying gas increases, and the useful power of the blower unit is lost. The gas flow rate is 50-80 m / s.

 The aim of the invention is to increase the intensity and productivity of the drying process.

 The goal is achieved in that the chamber for drying dispersed materials, containing a cylindrical body with tangential nozzles for introducing the drying agent and the processed material, blades for regulating the supply of the drying agent, the discharge nozzle, is equipped with a cylindrical shell concentrically mounted in the housing with a gap relative to the latter, the housing in the upper part is made open, connected to the supply system of the drying agent, while the holes for introducing the drying agent, tangential e tubes introduced into the internal cavity of the sleeve, the blades are arranged at the top of the sleeve and is rotatable about an axis perpendicular to the longitudinal axis of the housing, and tangential nozzles and annular gap formed by the upper part of the housing and the shell are provided with dampers.

 This design allows you to increase the intensity and productivity of the drying process.

 The installation of a shell with holes and tangential nozzles for introducing a drying agent provides a stream of secondary air, intensifying the drying process. Secondary air flow is regulated by dampers, which allows you to adjust the drying time. Repeated blades allow you to change the degree of swirling flow and to intensify the heat transfer process, i.e., change the drying time of the material.

 In FIG. 1 shows the proposed camera, General view; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 - rotary blades.

 The chamber contains a cylindrical body 1, a cylindrical shell 2 is mounted concentrically with a gap relative to the body 1. The blades 3 for regulating the supply of the drying agent are located in the upper part of the shell 2 and are made rotatable around an axis perpendicular to the longitudinal axis of the housing.

 To supply the processed material, the casing is equipped with tangential nozzles 4 introduced into the inner cavity of the shell 2. The drying agent is fed from above into the gap between the casing 1 and the shell 2, as well as inside the shell along its axis. In the wall of the shell 2, holes 5, 6 are made for entering into its drying agent. The tangential nozzles 4 and the annular gap between the housing 1 and the shell 2 are provided with shutters 7, 8. The shutters 7, 8 as well as the blades 3 are made rotary to regulate the material and the drying agent, respectively.

 The processed material, for example grain, is fed into the chamber through nozzles 4, which give the flow a swirling character. When passing hot air (combustion products of fuel) between the rotary blades 3, the flow of air (gas) becomes swirling. Dispersed material (grain) is picked up by this swirling flow, both flows come in interaction, intense heat exchange occurs.

 The swirling of air (gas) and dispersed material may have the same or opposite direction. Secondary hot (cold) air passes through the annular space between the housing 1 and the shell 2, which penetrates into the chamber through openings 5 and 6. The flow of secondary air (gas) is regulated by rotary dampers 8, which allows you to adjust the drying time. The consumption of dispersed material is regulated by rotary dampers 7. The speed of exit of the drying agent from the interscapular channels is 100-150 m / s (in the prototype 50-80 m / s), which provides a high peripheral component of speed and a large degree of swirling of the flow, mixing of the processed material is better , the drying process is intensified, and hence productivity.

 In addition, the drying process and its time are regulated, the “hydraulic” resistance of the dispersed stream and the entire chamber is less, therefore, the cost of electric and heat energy is less. (56) Copyright certificate of the USSR N 1102622, cl. B 02 B 3/00, 1982.

 Planovsky A. N. et al. Drying of dispersed materials in the chemical industry. M.: Chemistry, 1979, p. 196-204, fig. VI-26.

Claims (1)

 A CHAMBER FOR DRYING DISPERSED MATERIALS, containing a cylindrical body with tangential nozzles for introducing the processed material, blades for regulating the supply of drying agent, an unloading nozzle, characterized in that it is equipped with a cylindrical shell concentrically mounted in the housing with a gap relative to the latter, the housing in the upper part is made open, connected to the supply system of the drying agent, while the holes for the input of the drying agent are made in the shell, the tangential nozzles are introduced the inner cavity of the sleeve, the blades are arranged at the top of the sleeve and is rotatable about an axis perpendicular to the longitudinal axis of the housing, and tangential nozzles and annular gap formed by the upper part of the housing and the shell are provided with dampers.

Images