SU1713632A1 - Mixer for loose materials - Google Patents

Abstract

The invention relates to a mixing technique and can be used to mix fine and powdered materials in various sectors of the national economy. The purpose of the invention is to reduce energy consumption. The mixer consists of a hermetic tank, inside of which is placed a transport tube with overflow valves installed above the loading level. The oscillator installed in the upper part operates synchronously with the overflow valves, resulting in the directional circulation and mixing of the bulk material with the upward movement inside the transport tube and the downward movement outside it. 1 il.sls

Description

The invention relates to a mixing technique and can be used to mix fine and powdered materials in various sectors of the national economy.

A mixer is known, which consists of a tank in which fluidization of the stirred components is carried out when the gas is supplied under a layer of bulk materials.

However, his work is accompanied by dust extraction, which requires the installation of aspiration systems.

Vibrating mixers are also known, in which the impact on the bulk material is carried out using vibrating bodies, additional baffles or inclined trays, as well as with

using vibration drivers input directly into the working chamber of the container.

The disadvantage of these mixers lies in the presence of vibrations of the body or its elements, which increases the energy intensity of the mixer and the abrasive wear of its parts.

An apparatus for treating bulk materials is also known, which contains a container with transport and downhole pipes interconnected at the top and bottom, with transport pipes at the lower ends having gas overflow openings. Due to the circulation of the solid phase, which occurs when gas enters through the overflow holes in the transport tubes, a high mixing quality can be achieved.

However, this device also requires cleaning the gas from the carried away particles and, therefore, has a high energy intensity.

The purpose of the invention is to reduce energy consumption due to the provision of circulating oscillatory motion of a gas-powder mixture through a fixed transport pipe with overflow openings and valves above the loading level,

The essence of the invention is that in the bulk materials mixer, consisting of a fixed sealed container with a transport pipe with overflow holes rigidly installed inside it, the transport pipe is equipped with valves located above the loading level and an oscillator installed in its upper part.

The difference from the known mixer is that the transport pipe is equipped with valves located above the loading level and an oscillator installed in its upper part,

The drawing shows a diagram of the mixer.

The mixer has a tank 1 and a removable cover 2 with a hatch for loading and unloading the material. In the tank 1 there is a transport pipe 3 with overflow holes 4 and valves 5 located inside the tank above the loading level. The transport pipe 3 is rigidly connected to the lid 2, Top the transport pipe has a pulsator 6 (diaphragm, bellows, piston), rigidly connected via a rod 7 to an oscillator (not shown). Valves 5 are also connected to the oscillator. The mixer body 1 is mounted on a fixed support with the help of paws 8.

The mixer works as follows

After loading the bulk material, the tank 1 is sealed. The oscillator communicates with the oscillator to the pulsator 6 through the rod 7 and the valves 5 are activated.

Synchronous operation of the oscillation generator and valves at the same frequency is accompanied by a decrease in the gas pressure and closed by the valves 5 of the overflow openings 4 of the transport tube by filling it with bulk material through the bottom

the open end, and when the pressure of the gas and the open transfer holes are increased, the bulk material flows through them from the transport pipe to the interturbine space. As a result, directional circulation and mixing of the bulk material with upward movement inside the transport pipe 3 and downward movement outside it occurs.

For example, in a mixer with a volume of 0.05 m (diameter of 0.25 m, height of 0.5 m) with a transport pipe with a diameter of 0.07 m, which is rigidly installed inside it, 0.05 m away from its bottom a distance of 0.1 m from its lid and loading level, four flow-through openings with a diameter of 0.02 m, with valves in the form of petals of elastic material placed on the outside of the pipe with the possibility of moving their lower ends, hermetically closed at the top with an elastic rubber membrane connected to eccentric shaft of an electric motor, complete mixing with cement A soot with a layer height of 0.4 m is performed with a pulsation frequency of 5 Hz, an amplitude of membrane oscillation of 8 mm and an input power of 0.1 kW for 5 minutes.

To achieve the same quality of mixing in a vibrating mixer with the same frequency and amplitude of vibrations, an input power of 0.5 kW and a special shaker are required.

Thus, the proposed technical solution allows reducing the energy intensity of the mixer by more than 4eiv with significant simplification of auxiliary equipment,

Formula a and 30 brethes — a mixer of bulk materials consisting of a fixed sealed container with a transport pipe with overflow openings rigidly installed inside it, characterized in that, with the whole reduction of energy intensity, the transport tube is equipped with valves that are located at the overflow openings above loading level , an oscillator and a pulsator connected to it installed in its upper part.

Claims (1)

40 Formula of the invention — A mixer of bulk materials, consisting of a fixed hermetic container with a transport pipe rigidly installed inside it with transfer ports45 mi, characterized in that, with the whole 'reduction in energy consumption, the transport pipe is equipped with valves located at the transfer openings above the load level, an oscillation generator and connected to 50 pulsator installed in its upper part.