SU832279A1 - Plant for continuous drying of sponge material - Google Patents

Description

one

The invention relates to a drying technique in the manufacture of spongy products made of latex and rubber, porous polymer products or other similar materials.

A device for drying sponge articles is known, comprising a conveyor with a working branch, a layer, a product to be dried, and pressure rollers installed in pairs above and below this branch .1.

A disadvantage of the known installation is a low heat exchange rate.

The purpose of the invention is the intensification of heat and mass transfer.

This goal is achieved by the fact that the installation additionally contains gas-distributing collectors with aprons located above the working branch behind each of the rolls of the pair. As the conveyor moves, one of the aprons of each collector is placed in contact with the roller and is rigid and the other in contact with the dried material and made flexible.

FIG. 1 shows a diagram of an installation and for a continuous sponge product; in fig. 2 is a diagram of a collector with an apron;

in fig. 3 is a flow chart of heated air and vapor-air mixtures.

The installation includes a chamber 1 with a vent nozzle .2 for removal of water vapor and exhaust air, a conveyor 3 with a working branch 4 carrying the products to be dried 5, installed lower 6 and upper 7 pressure rolls with pressure mechanisms 8, gas supply pipe 9, gas-distributing collectors 10 with aprons-I and 12.

The installation works as follows.

Sponge articles 5 to be dried are placed on working branch 4 of conveyor 3, conveyor products are fed into chamber 1 and then the gap between upper presser roller 7, branch 4 and lower presser roller 6 of the first pair enters, the spongy product is deformed, pores are compressed, and cold air is squeezed out of them (Fig. 3).

Claims (2)

Then, on exit from the gap of the 1st pair of rolls, the product restores its original volume, the pores expand, at this moment heated air is blown into the product from the gas distributing collector 10 installed behind the roller 7 between the aprons II and 12. The aprons are two longitudinal walls attached to the collector, thanks to them, the hot air coming out of the gas-distributing collector is directed onto the surface of the spongy product, while the apron 12 adjacent to the roll is rigid, and the apron 11 adjacent to the surface of the lips The product 5 is made flexible, since the thickness of the sponge product is not constant. This apron can be made of sheet metal and mounted on a collector pivotally or from a dense fabric or sheet rubber. Due to the fact that the heated air is supplied at that moment and directly to the place of the product, where volume recovery takes place, it penetrates inside the pores throughout the entire thickness of the product. As a result, the product is heated at the same time throughout the entire thickness; the heated air inside the pores is in contact with moisture and evaporates it. On the next pair of rolls, while pressing the product, the vapor-air mixture is squeezed out of it, and behind the rolls, the process of introducing a new portion of heated air into the pores of the product is repeated. and so on each subsequent pair of rolls until the product is completely dried. Water vapor and exhaust air from the heat chamber 1 is removed through the nozzle 2 into the exhaust ventilation system. Claim 1. Installation for continuous supply of spongy products, containing a conveyor with a working branch carrying dried products, and pressure rollers installed in pairs above and below this branch, in order to intensify heat and mass transfer, the installation additionally contains gas distributors with aprons located above the working branch behind each of the rolls of the pair in the course of the conveyor movement. 2. Installation according to claim 1, characterized in that one of the aprons of each collector is placed in contact with the roller and is rigid, and the other is in contact with the material to be dried and made flexible. Sources of information taken into account in the examination 1. US Patent No. 3796149, cl. 100-118, published. 1974.