SU1719829A2 - Solar drier - Google Patents

Abstract

The invention relates to solar technology and can be used for drying materials and products in industry and agriculture and is an additional invention to auth.s. USSR No. 1590898, the purpose of the invention is to intensify the drying process by reducing the uneven distribution of the air flow over the product and speeding up the exhaust air from the dryer. In the solar dryer, an alternating width slot 11 is additionally made in the outlet nozzle, increasing from the nozzle center to its periphery, and the air exhaust duct 1 is additionally equipped with an annular condensate collector 8c with a condensate collection tank and a rotary wind drive with upper and lower rolling supports 5 made in the form of a coaxially mounted cylindrical shell 2, provided inside with blades 3 located along its perimeter, with a length smaller than the shell radius, and outside with blades, the shell being set to an air duct in the upper and lower bearings 5 of the roller; and the condensate collector 8 is located at its lower support. 5 il. ff yo

Description

FIG. one

The invention relates to solar technology, is intended for drying products and materials in agriculture and industry and is an improvement of the invention according to the author. No. 1590898.

A known solar dryer contains, in addition to conventional assemblies, a flow-through air path with a heat accumulator and wind turbine using a deflector and flat concentrators, kinematically connected with the heat receiving element for the product.

However, the known device is characterized by uneven removal of exhausted air at a nozzle outlet local to the dryer cross section, insufficient use of wind to increase the speed of exhaust air with significant deflector resistance when there is no wind, and the possibility of condensate back into the dryer from the exhaust duct.

The purpose of the invention is to increase the efficiency of the drying process by uniformly distributing the air flow over the product and more intensively removing it with less resistance, including in the absence of wind.

The goal is achieved by the fact that the outlet is provided with a gap of variable width, located in the plane of laying of the product, and the gap increases to the periphery from the exit. Holes, exhaust duct instead of the deflector is equipped with a rotary wind drive with blades inside, made in the form of a cylindrical shell coaxial with the duct, and an annular condensate collector at one of the rolling supports, there is also a tank for collecting condensate.

Exhaust air is removed evenly across the entire width of the dryer without stagnant zones. The natural ha in the absence of wind is improved by the presence of a rotary wind turbine blade with a radius smaller than the radius of the exhaust duct - the core of the exhaust flow does not intersect. Combined wind drive - fan with a hollow axial zone - optimizes the drying process. Symmetrical with a variable slit, symmetric with respect to the outlet of the hole, they ensure the removal of equal portions of the air flow at any distance from the axis due to the interconnection between the width of the slit and the structure and the outlet nozzles.

FIG. 1 shows a solar dryer, a general view; in fig. 2 - the node of the hollow rotor wind drive and the outlet; on

FIG. 3 and 4 - internal blades, external blades and their interposition, top view; in fig. 5- hollow rotary wind drive.

FIG. 1-4 are marked: 1 - exhaust

air duct; 2 - shell of the rotor wind drive; 3 — fan blades; 4 - wind blades; 5 - rolling bearings; 6 - condensate collector; 7 - pipeline; 8 condensate capacity; 9 - brackets; 10 - heataccum torus; 11 - slotted outlet; 12 - transparent coating; 13 - product; 14 — heat transfer plate; 15 - inlet; 16 - outlet; 17 - dryer body.

Through the transparent coating 12, the solar energy is perceived by the product 13, the heat-receiving plate 14 and the heat-vacuum accumulator 10, which gives off heat

airflow from the inlet 15. Due to the presence of a variable slot 11, the flow is aligned above the product surface and is removed through the inlet 16 and exhaust duct 1, the hollow shell 2 of the rotary wind drive, coaxially installed with the duct on the roll supports 5. In this case, the exhaust air condensate is collected by the condensate collector 6 into the tank 8.

.. The wind regime additionally intensifies the process of drying with internal laths .3 on the sidewall 2, which is rotated by the blades 4 from the wind, forcibly pumping additional volumes of less humid outdoor air.

Efficiency improvement is achieved by reducing the drying time due to greater uniformity, increasing the specific moisture content both in calm and

in the wind mode, as well as the exclusion of the return of condensate into the cavity of the dryer. The quality of the products with helium-air drying is enhanced by optimizing the process for different modes with

using a wind drive fan.

Claims (1)

The formula of the invention heliosushilka on avt.sv. No. 1590898, differing from the fact that, in order to intensify the drying process by reducing the uneven distribution of the air flow over the product and speeding up the exhaust air output from the dryer, in the outlet nozzle A variable width gap is increased, increasing from the nozzle center to its periphery. and the air exhaust duct is additionally equipped with an annular condensate collector with a tank for collecting condensate and a rotor wind drive with upper and lower rolling bearings, made in the form of a coaxially mounted cylindrical shell, provided inside located along its perimeter blades with a length smaller than the radius her supports. gulls, and outside - blades, and the shell is installed on the air duct in the upper and lower rolling bearings, and the condensate trap is located at the lower .phage 2 fig.Z 9 / fieL FIG. five gb