RU96417U1 - CONTINUOUS VACUUM DRYER - Google Patents

Abstract

 Continuous vacuum dryer containing a thermally insulated drying chamber with a heating device, a loading device connected to the hopper, an unloading device, a control panel with sensors for temperature, humidity, shaft dispenser position and hopper fullness, a vibration conveyor, characterized in that the drying chamber has openings and a pump to create a uniform vacuum, the loading and unloading devices are made in the form of a rotating metering shaft with a given volume cut, vibration The first conveyor is designed in the form of rectangular perforated trays, consisting of a bottom, sides and studs, designed to fix the trays in pairs at a variable symmetrical angle to the drying chamber frame mounted on an electromagnetic vibro drive.

Description

The invention relates to a device for drying bulk materials and may find application in agriculture and the food industry mainly for drying crops.

Known dryers for drying bulk materials, such as grain, RF patent No. 20133723 "Continuously operating vacuum belt dryer for bulk materials", cl. C1 MPK5 F26B 5/06, F26B 13/02, containing a circular cross-section housing with a vacuum and water vapor removal system and a belt conveyor mounted inside it with external and internal belts having a common driving drum and different swivel rollers.

However, the mechanisms are characterized by low reliability, due to wear of the conveyor belt, bearings, as well as the need for its frequent adjustment, in addition, they have increased complexity and metal consumption.

The closest in technical essence and the achieved result is a vibration dryer (RF patent No. 87506 "Vibration dryer", U1 F26B 17/30) containing a thermally insulated drying chamber with loading, unloading devices, exhaust air outlets, a control panel with temperature sensors and humidity device for heating, air supply and a vibrating conveyor, made in the form of rectangular perforated trays, consisting of a bottom, sides, diffusers for pumping heated air through Without the bottom and studs designed to secure the trays in pairs at a variable symmetrical angle to the frame of the drying chamber, equipped with an electromagnetic vibrator.

The disadvantage of this apparatus is the rather long drying time of the material, since the process takes place at atmospheric pressure. In this regard, problems arise with the adjustment of the vibration conveyor, the metal consumption of the installation increases, since it is necessary to use additional trays.

A utility model is proposed in which the vibration conveyor is in vacuum, while the drying chamber is assembled with devices for loading and unloading the product.

The end result is the reduction and improvement of the quality of the drying process of grain, and other bulk products.

The essence of the proposed device is illustrated by the scheme, where in Fig.1 is a view of the device from the side; figure 2 - diagram of a perforated tray; figure 3 - diagram of the mechanism of the dispenser.

A continuous vacuum dryer (Fig. 1) contains a thermally insulated drying chamber 11, a heating device 4, a loading device 5 connected to a hopper 6, a discharge device 14, openings 3 and a pump 2 for maintaining a uniform vacuum, a control panel 1 with temperature sensors and humidity 12, the position of the metering shaft 15 and the fullness of the hopper 7, the vibration conveyor located inside the chamber, which consists of a frame 9 mounted on an electromagnetic vibrodrive 13, rectangular perforator are mounted on the frame Bathrooms trays 10.

Rectangular perforated trays of the drying chamber (Fig. 2) consist of a perforated bottom 1, studs 2 and sides 3. Trays are mounted on studs in pairs with symmetric variable tilt angles (Fig. 1) on the frame and secured with a nut.

The loading and unloading devices contain a metering shaft 1 with a slot 2 of a predetermined volume (Fig. 3), the metering shaft is mounted in the housing hermetically on the bearings and rotates using drive 8 (Fig. 1). The shafts dispensers of the loading and unloading devices operate synchronously, which provide sensors located on the shafts.

A continuous vacuum dryer operates as follows. The wet product enters from the hopper into the loading device, in which the metering shaft captures a predetermined volume of the product and, rotating counterclockwise, feeds it to the upper perforated tray of the drying chamber, which is installed at an angle to the direction of product movement, where it is moved by vibrational vibrations, created by an electromagnetic vibro drive to the next perforated tray mounted at a symmetrical angle (with respect to the upper perforated tray). After passing the second tray, the movement process is repeated along the next pair of perforated trays. The number of trays should be calculated taking into account the drying time and the speed of the product, the whole process takes place under the vacuum created by the vacuum pump. The finished, dried, product is removed through the unloading device installed on the bottom of the drying chamber, using a metering shaft.

Heating elements can be mounted in the walls of the drying chamber for uniform heating of the product; solid, liquid, gaseous fuel or electric energy can be used as an energy source.

The control panel with sensors provides temperature and humidity control inside the drying chamber and controls the heating device, the sensors of the dispenser and the hopper synchronize the operation of the loading and unloading mechanisms.

Claims (1)

Continuous vacuum dryer containing a thermally insulated drying chamber with a heating device, a loading device connected to the hopper, an unloading device, a control panel with sensors for temperature, humidity, shaft dispenser position and hopper fullness, a vibration conveyor, characterized in that the drying chamber has openings and a pump to create a uniform vacuum, the loading and unloading devices are made in the form of a rotating metering shaft with a given volume cut, vibration The first conveyor is designed in the form of rectangular perforated trays, consisting of a bottom, sides and studs, designed to fix the trays in pairs at a variable symmetrical angle to the drying chamber frame mounted on an electromagnetic vibratory drive.