SU467751A1 - Crystallizer - Google Patents

Description

(54) CRYSTALIZER

one

The invention relates to chemical technology, namely, crystallizers for the production of solid products as a result of a chemical reaction, for example, silicic acid.

A mold is known that contains a housing, a bottom, nozzles for supplying reagents, withdrawing products, and a mixing device of a bubble type with a guide cylinder.

However, such a structure does not ensure efficient and uniform mixing throughout the entire working volume of the crystallization torus, therefore it cannot be used to obtain silicic acid,

In addition to Toroj, a device for washing the obtained solid phase is not provided in the known crystallizer, which leads to a decrease in the quality of the product obtained.

The purpose of the invention is to provide an intensification of the crystallization process and to obtain a high-quality product.

This is achieved by the fact that at the bottom there is a central nozzle with a feed tube, and in the lower part of the body is fixed

I installed a ring barbather and vacuum device,

FIG. 1 shows a crystallizer, vertical section} in FIG. 2 is a section along A-A in FIG.: 1; FIG. 3 shows a vacuum suction head, longitudinal section.

I Inside the mold 1 there is a j annular bubbler 2, which is supported by a nasphalic bottom 3. At the bottom of the jBoro ring of the bubbler 2, there are holes 4 around the perimeter, and on its upper part there are pipes 5 and 6 for supplying gas: and gas fluids passing through the lateral nozzles 7 and 8 of the mold.

A siphon tube is used to remove the mother liquor and flush liquid; 9, and for removing the mother liquor and the washing liquid from the solid phase, a vacuum device consisting of a head 10 and a pipe 11 passing through the side nozzle 12.

The suction head of the liquid from the solid phase consists of a chamber 13 and a slot filter 14, Outside to the bottom. 3, a central nozzle 15 is fixed, having a side nozzle 16 into which a gas supply tube 17 is fixed. ; The annular and central nozzle, siphoning pipes, and vacuum suction are made of an acid resistant material. To supply 5KID reagents on the lid 18 of the mold, there are nozzles 19 and 20. From the crystallizer, gas is removed through nozzle 21. The described mold operates as follows. In the mold 1 through the pipe 19, the required amount of hydrochloric acid is supplied. The central pipe 15 through the side pipe 16 and the pipe 17 receives compressed air through the pipe. water 5 is also supplied with compressed air to the annular sparger 2. After that in the pipe. 20, the calculated amount of zippy sodium glass is supplied, and a solid phase of silicic acid is formed in the crystallizer as a result of those chemical reactions. After a predetermined time, the supply of compressed air through the bubblers is stopped and clarification of the mother liquor occurs. With the help of the siphon tube 9, the clarified mother liquor is removed from the crystallizer; The slurry is mixed with compressed air as described above. The solid phase is settled; the washing liquid is removed from the crystallizer in a manner similar to the removal of the mother liquor. According to the eye of washing of silicic acid from chloride ions, part of the wash. hkk- the bone remains in the mold. The suspension is agitated with compressed air and released into the centrifuge through a nozzle 15 into which compressed air is continuously supplied to prevent clogging with silicic acid. The subject of the invention A crystallizer for producing solid 1Products as a result of a chemical reaction, for example, silicic acid, comprising a housing, a bottom, nozzles for supplying reagents and withdrawing products, and a mixing device of a bubbling type, with the aim of intensifying the process of crystallization and obtaining a high-quality product, the central branch pipe with a tube for supporting gas is fixed to the bottom, and an annular bubbler and a vacuum device are installed in the lower part of the body.

Phg / city /

eight

FIG. 2