SU750229A1 - Plant for drying polydispersed materials - Google Patents

Description

(54) INSTALLATION FOR DRYING OF POLYDISPERSE MATERIALS

one

This invention relates to a technique for drying dispersed materials, such as manganese dioxide, pigments, dyes, organic chemicals, and can be used in the chemical, construction, electrical, food and other industries.

Installations for drying polydisperse materials, predominantly manganese dioxide, pigments, dyes and organic chemicals, are known. They contain a vertical casing with a charging device in the upper part and a bypass channel and a pneumatic disintegrant device made in the form of a jet mill 1.

A disadvantage of the known installations is the impossibility of combining the drying process with the organized grinding of the material to obtain certain predetermined particle sizes.

The purpose of the invention is the ability to adjust the parameters of heat transfer.

This goal is achieved by the fact that the body is made in the form of two truncated cones mated with large bases, and along their axis a conical insert is installed with the possibility of vertical movement, which regulates the living section of the body, and the larger section of the insert in the lower extreme position is located in the plane of conjugation of the cones enclosures. In addition, 5 between the loading device and the housing, a gate-feeder is installed.

The drawing schematically shows the described installation.

The installation contains a vertical body 1, made in the form of two truncated cones 2 and 3, joined with large bases, in the upper part of the body 1 a loading device 4, a gate feeder 5 are installed and a bypass channel 6 is located, and a jet mill 7 is connected to the lower part A tapering insert 8 is installed along the axis of the housing 1 with the possibility of vertical movement, which controls the living section of the housing 1, with a larger section of the insert 8 in

20, the lower extreme position is located in the interface of the cones 2 and 3 of the housing 1. The insert 8 is provided with a drive 9. The jet mill 7 is connected to the housing 1 by a central tube 10 with a nozzle 11 and

bypass pipes 12 and provided with accelerating channels 13 and ejectors 14.

Case 1 pneumotube 15 is connected to the cyclone 16, and pneumotube 15 is equipped with a pipe 17 with a valve 18.

The installation works as follows.

Wet material from the loading device 4 through the gate-feeder 5 enters the pneumatic tube 15, where the separation into conditioned and substandard fractions. The conditioned fractions are transported by the flow of coolant through a pneumatic tube 15, drying in this case, and entering the cyclone 16. Non-conventional fractions B countercurrently with the coolant get into the housing 1, where, thanks to the insert 8, they are directed through the bypass pipes 12 to the jet mill 7, where they are ground. All the crushed material, containing conditioned No. substandard fractions, flows through the central tube 10 into the housing 1, where its final drying takes place. By changing the position of the insert 8, it is possible to regulate the velocity of the heat transfer medium and thereby effect a controlled aerodynamic fractional separation of the material into conditioned and substandard fractions. The conditioned fractions through the bypass channel 6 enter the pneumatic tube 15 and further into the cyclone 16, and the non-conditioned fractions are again fed for grinding to the mill 7.

Thus, the proposed device allows to combine the process of drying and adjusting the fine grinding of the material, which reduces energy consumption due to heat loss and reduced transportation costs.

Claims (2)

1. Installation for drying polydisperse materials, mainly manganese dioxide, pigments, dyes and organic chemicals, containing vertical a housing with a loading device in the upper part and a bypass channel, and a pneumatic grinding device connected to the lower part of the housing, made in the form of a jet mill, characterized in that In order to regulate the parameters of heat and mass transfer, the casing is made in the form of two truncated cones, conjugated with large bases, and along their axis is mounted with the possibility of vertical movement a cone-shaped insert that adjusts the living the cross section of the housing, with the larger cross section of the insert in the lower extreme position located in the plane of the conjugation of the cones of the housing. 2. The installation according to claim 1, wherein a gate-feeder is installed between the loading device and the case. Sources of information taken into account in the examination 1. USSR author's certificate № 405002, cl. F 26 B 17/10, 1971.