RU1798607C - Device for drying powder products - Google Patents

Abstract

Usage: food and chemical industry. SUMMARY OF THE INVENTION: The installation includes a thermally insulated housing. IR heaters, a drying platform for the material to be dried, a heat-conducting screen, reflectors, thermocouples and an electronic drying control system. The case and screen are cylindrical and are mounted horizontally. The screen is rameggzen in the housing coaxially and with a gap. The reflectors are in the form of a paraboloid of revolution. Heaters are mounted in reflectors. The platform is located inside the screen, and the heaters are in the gap between the case and the screen. Thermocouples are mounted on the platform in the material to be dried. The platform is rotatably mounted in a horizontal plane. The heaters are rotatable vertically around the platform. Thermocouples are connected to an electronic drying control system. 2 ill. 6 k

Description

The invention relates to equipment for drying dispersed materials and may find application in the food, chemical, construction and other industries and agriculture.

The purpose of the present invention is to provide. the uniformity of the drying of the material with simultaneous automatic control of the temperature regime, the intensification of the drying process, the elimination of the removal of the dried material.

Fig. 1 is a diagram of an apparatus for drying dispersed materials; figure 2 shows a diagram of a drive with a brush device.

The installation comprises a thermally insulated casing 1, in which IR heaters 2 with reflectors 3 and a heat-conducting screen 4 are located, covering a platform 5 with a bucket 6 filled with a dried material, thermocouples 7 uniformly placed through the brush device 8 and terminal a with an electronic automatic control system 9, to which IR heaters 2 are also connected (via terminals b), and a drive electric motor 10 (terminal RD).

Installation works as follows.

When infrared heaters 2 are turned on, parabolic reflectors 3 focus the radiation on the box 6. Screen 4 is made of heat-resistant and heat-conducting material and does not prevent the passage of rays. The heating of the dried material is controlled by thermocouples 7} the signals from which are transmitted through a brush device 8 to an electronic automatic control system (ESAU) 9, which forms an algorithm for reversing the rotation of IR heaters 2 together with reflectors 3 and a platform with a box 6. Depending on temperature changes of separate volumetric areas or flat layers of the dried material, determined using ESAU by differentiating the readings of individual thermocouples, ESAU sets the required mode (linear and angular velocity st, angle, frequency reverse) movement, frequency and duration of activation of the IR-heaters, and also controls the operation of the motor 10. Thus controlled and stabilized temperature, provided an intense, uniform and drying process is prevented overheating of the material.

The presence of reflectors ensures uniform heating of the material at each point of its volume, and also reduces the turbulence of air flows caused by

rotation of IR heaters 2, which together with the screen 4 eliminates the removal of the dried material 7 from the box 6. This condition is absolutely necessary, for example, when determining the moisture content of products

method. Most importantly, uniform heating of the dried material in its volume provides the same conditions, drying time, preservation of quality indicators ... .

The developed apparatus for drying dispersed materials provides optimal conditions for drying various materials and, in particular, finely dispersed ones, for which npw drying in existing drying chambers is characterized by increased material removal. The drying regime is optimized by providing a heating temperature at which drying is carried out simultaneously and achieved

the maximum speed of the process while maintaining the qualitative properties of the material.

The installation can find the widest application in laboratory and industrial conditions for

express analysis of moisture content of various products by weight method.

Claims (1)

SUMMARY OF THE INVENTION An apparatus for drying dispersed materials, including a thermally insulated case, IR heaters, a platform for the material to be dried, moved in the case, characterized in that, in order to increase the uniformity of drying and process intensification, the installation is equipped with a heat-conducting screen, reflectors, thermocouples and an electronic drying control system, the case and the screen have cylindrical shape, mounted horizontally, with the screen placed in the housing coaxially and with a gap, the reflectors are in the form of a paraboloid of rotation, the heaters are mounted in the reflectors, the platform is placed inside the screen, and the heaters are in the gap between the body and screen, thermocouples are mounted on the platform in the material to be dried, the platform is mounted with the possibility of reverse rotation in the horizontal plane, and the heaters with the possibility of 5 rotations in a vertical plane around the platform, while thermocouples are connected to an electronic drying control system. / g / ermo a / eam / gd / g0A- / ESAU (dB / baud a / , 2