SU1345035A1 - Drier for loose materials - Google Patents

Abstract

This invention relates to a technique for drying polydisperse materials in air tubes. The purpose of the invention is to improve the quality of drying by equal-to-one heat treatment. For this, the pneumatic tubes (ПТ) 1 and 2, connected by an adapter (П) 5, are located V-figuratively, the blade spreader 3 ПТ 2 of a larger diameter is connected to П 5 from the ПТ 1 side of a smaller diameter, and the latter is connected to П 5 tangentially. This causes large trajectories of the movement of large fractions, a longer duration of their stay in the drying volume and high relative phase velocities, thus achieving the minimum difference in the moisture content of large and small particles. .2 il. W

Description

The invention relates to a technique for drying polydisperse materials in .pipe tubes and can be used in various industries,

The aim of the invention is to improve the quality of drying by uniform heat treatment.

FIG. 1 shows schematically the proposed dryer; FIG. 2 is a section A-A in FIG. 1;

The dryer contains two V-shaped pneumatic tubes of smaller and larger 2 diameters, paddle spreader 3, bunker 4, adapter 5 to which pneumatic tube 1 of smaller diameter is connected tangentially, valve 6, pipe 7 of the final drying. Figures 8 and 9 denote, respectively, the flows of the drying agent and gas suspension.

The dryer works as follows.

Wet peat from the hopper 4 is fed by a screw feeder to the end of the blade spreader 3 and, with the help of the latter, is thrown at a speed of 15-35 m / s to a larger diameter pneumatic tube 2, into which a stream of drying agent 8 flows from the furnace. At the same time, the smallest fractions of peat are carried by a stream of drying agent through adapter 5 into pipe 7 of the final material DOSING. Larger peat particles reach the part of the pneumatic tube 2 and are entrained in the fresh flow of the drying agent in the pneumatic tube 1 and then fed to the pipe 7 of the final final drying in a swirling flow. The tangential injection of coarse fractions into the tube 7 causes large trajectories of movement and, consequently, a longer residence time of coarse particles in the drying volume and high relative phase velocities, thus achieving a minimum difference in the moisture content of coarse and fine particles. The gas suspension flow 9 from the pipe 7 enters the dust separation system. The distribution of the drying agent between the pneumatic tubes 1 and 2 is carried out by a valve 6,

Formula of invention

Dryer for bulk materials, containing two pneumatic tubes of different diameters connected in parallel with the lower part to the source of heat carrier, connected in the upper part of the reel, with a loading device, and with the aim of increasing the - dryness; pneumotubes are located V-ibrasno., and the discharge device is connected to an adapter on the side of pneumotubs of a smaller diameter, which is connected tangentially to the adapter.

Compiled by A, Zheleznov Editor N, Shvydka Tehred A. Kravchuk Proofreader M, Pojo

Order 4907/39 Circulation 635 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-355 Raushsk nab ,, d, 4/5

: Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

2o claims A dryer for bulk materials, containing two pneumatic tubes of different diameters connected in parallel with the lower part to a heat source 25, connected to the upper part by an adapter, the largest of which is equipped with a loading device, and an unloading device, distinguishing 30 with the fact that, in order to improve the quality of drying, the pneumatic pipe located V-shaped, and the unloading device is connected to the adapter on the side of the smaller pneumatic pipe, which is connected tangentially to the adapter. l Compiled by A, Zheleznov