SU965466A1 - Band filter for treating polymers - Google Patents

Description

The invention relates to a filtering technique, in particular, to lentongng filters and is used in the chemical industry in the production of polymers.

A filter for treating polymers is known, containing Kopiyc with a drum mounted on it, covered with a metal net. Drum set. In the upper part of the housing there are holes for introducing a hot aqueous suspension of the polymer and suction of the vapor-gas mixture to; its lower part contains two assemblies {FOR hot water and suspension-; Limera in cold water. A nozzle is installed above the drum to irrigate the polymer with cold water to quench it. In addition, before the second collection above the drum, a knife is installed, tightly adjoining. to the drum mesh for cutting polymer edges into a second collection

The disadvantage of this filter for polymer processing is the inevitable mixing of cold and hot water, which leads to an increase in steam consumption to produce hot water and impairs the tempering of the polymer. In addition, the knife-to-the-grid knife does not always completely cut off the polymer chips, the varnish-like flow of hot water, which leads to the overheating of the chips.

Closest to the proposed technical essence and the achieved result when using is a belt filter for processing polymers, comprising a housing with drums located in it7

10 on which the infinite filter cloth is stretched With the formation of the upper and lower branches. For removal of the polymer from the surface of the canvas is a knife, tight

15 to the canvas. The initial hot polymer suspension is supplied through a pipe. In the lower part of the housing, on the input side of the slurry, there is a conical hopper for collecting and

20 removing the hot filtered water, ac from the opposite side of the hull, there is an unwind hopper. Nozzles for aakalki polymer with cold water are also located on the housing.

25 and the pipe for removal of the gas-vapor mixture 2.

This belt filter for polymer processing provides slightly better separation of hot and cold water, however, it eliminates the ingress30

product in hot water. All this reduces: the efficiency of polymer processing.

The aim of the invention is to increase the processing efficiency of polymers by eliminating product losses with hot water and preventing the mixing of hot and cold water.

This goal is achieved by the fact that in a belt filter containing a housing with drum located in it, on which infinitely stretched filter cloth with the formation of upper and lower branches, a knife for removing the polymer from the canvas, feed the pipe with an outlet hole for the original hot polymer slurry, conical hopper for receiving and removing hot water, nozzles for quenching polymer with cold water, a discharge hopper and a pipe for discharging the vapor-gas mixture, the upper branch of the filter sheet has a concave part BC, above which the outlet of the supply pipe is located, and the hopper for hot water is located directly above the concave section.

In addition, the filter sheet is made in the form of separate sections.

FIG. 1 shows a belt filter / p general view; in fig. 2 -: the same, top view. .

A belt filter for polymer processing consists of a housing 1 inside which a sectioned filter cloth 3 is tensioned on two rotating drums 2- On one side the case is equipped with a pipe 4 for introducing the initial suspension suspension and a nozzle 5 for evaporating water vapor and solvent f the other side by the Bottles 6 for the entry of cooling water. In the sily of the hot suspension feed, the filter sheet 3 has a concave portion. 7, under which is located a bunker 8 with a branch pipe 9 for draining hot water. The filter is also provided with a discharge bin 10 with a branch pipe 11 for outputting the product and / a drive 12 consisting of a gearbox 13. And an electric motor 14.

The belt filter for polymer processing works in the following way. ..

The initial hot polymer suspension through pipe 4 falls on the concave section 7 of the filter sheet. At the same time, the hot water is discharged into the bunker 8 and through the pipe 9 is removed from the housing 1, and the polymer crumb separated from the water is transferred by the web 3. to the quenching site by means of nozzles 6. After the polymer is quenched, the polymer crumb together with cold water is discharged into the discharge bin 10 and through the pipe

11 Output from the filter. The rotation of the drums 2 is driven

12 through the gearbox 13 from the electric motor 14.

The use of a belt filter for the treatment of polymers has advantages over the prototype, consisting in eliminating product losses with hot water and preventing the mixing of hot cold water, which leads to an increase in the efficiency of polymer processing.

The amount of polymer of the second grade in terms of chromaticity is reduced from 20% to 5 ... 10%.

Losses of solvent vapors are reduced from 10 to 15 kg per ton.

The expected annual economic effect from the implementation of the invention is about 80 thousand rubles.

formula of invention

Claims (2)

1. A belt filter for treating polymers, comprising a housing with drums arranged in it, on which an endless filter cloth is stretched to form upper and lower branches, a knife for polymer from a cloth, and a pipe o With an outlet for an initial hot polymer suspension, conical hopper for receiving and removing hot water, nozzles for quenching polymer with cold water, a discharge tank for discharging gas-vapor mixture, aphid ae, and so that, in order to increase the efficiency of polymer processing by eliminating product loss with hot water and preventing the mixing of hot and cold water, the upper branch of the filter sheet has a concave portion above the outlet of the supply pipe, and the hot water tank are located directly below the concave portion. 2. The filter according to claim 1, about tl. And h and y and the fact that the filter cloth is made in the form of separate sections. . . Sources of information taken into account in the examination, 1. Technological regulations II 629-79 production of perchlorovinyl resin dichloroethane method Sterlita Aksky Association Caustic. - 2. Khrulev, MV Polyvinyl chloride. Chemistry, 1964, p. 19.9. And -JFie .2