CS196070B1 - A process for separating a semi-solid phase from a gas-liquid reaction mixture and a vibrating diffuser reactor for carrying out the process - Google Patents

Abstract

The invention relates to a method for separating a semi-solid phase from a gas-liquid reaction mixture and a reactor with a vibrating diffuser for carrying out this method.

Description

The invention relates to a process for separating a semi-solid phase from a gas-liquid reaction mixture and a vibration diffuser reactor for carrying out the process.

Many chemical and physical operations involving both gas and liquid phases can be significantly intensified by dispersing the liquid phase in the form of tiny drops into a continuous gas phase. These operations include eg heating, resp. gas cooling (during prilling, spray drying), dissolution, resp. gas desorption, or finally chemical reactions between the liquid and gas phase components (combustion of liquids, neutralization of acids with ammonia).

In most technologically interesting cases, after the desired operation, the gaseous heterogeneous mixture formed has to be separated again into a homogeneous gaseous and condensed phase, or at least to prevent a gradual fouling of the reaction space by the condensed phase precipitated on the reactor walls. The technical solution to this problem is particularly difficult in cases where the condensed phase is a highly viscous liquid or has a plastic, semi-solid character, such as in the case of heavy tars or colloidal, respectively. gel-like microcrystalline precipitates.

The above-mentioned shortcomings of the prior art overcome the proposed method of separating the semi-solid phase from the gas-liquid reaction mixture according to the invention, which consists in that the gas-liquid mixture bypasses the vertical vibrating baffle and after coalescence of the condensed phase.

The proposed process is preferably carried out in a reactor with a vibration diffuser consisting of an outer jacket with a gaseous phase outlet and a lid with a reaction gas-liquid mixture inlet, wherein the inlet space is separated from the outlet space by a cylindrical partition connected to the vibrator.

The advantage of this method, which utilizes the vibration liquefaction of the condensed pseudoplastic material, is that it replaces the prior art method of removing the condensed phase with movable scrapers, respectively. agitator, which is a technically more demanding process and therefore less economically advantageous.

A reactor with a vibratory diffuser for separating the semi-solid phase from the gas-liquid reaction mixture is shown in the drawing, which shows the outer jacket 2 of the gaseous phase, the lid 3 with the inlet 4, the cylindrical partition 5 connected to the vibrator 6 and the reactor bottom.

Example

A heavily contaminated mixture of phosphoric and nitric acid with a high content of calcium and magnesium salts was dispersed with ammonia gas and the product of this operation was fed to the reactor via a feed tube during the fog period. The condensed phase was discharged from the bottom of the reactor and the gas phase was discharged. The drain was partially separated from the reaction chamber by an internal cylindrical partition attached to the vibrator. The cylindrical partition was 200 mm in diameter and 350 mm high. The throughput through this sized reactor was about 50 kg / h of condensed phase and 5 kg / h of water vapor / unreacted ammonia mixture.

When the bulkhead was left free of vibration, within about half an hour its entire cross-section clogged with the cake of the semi-solid neutralization reaction product. When the baffle was continuously vibrated at a frequency of about 50 Hz and an amplitude of about 0.5 mm, a hard sediment of 3 to 8 mm thickness was formed within about two hours due to an additional reaction of the condensed phase adhering to the wall,

Claims (2)

SUBJECT V Method for separating a semi-solid phase from a gas-liquid reaction mixture, characterized in that the new liquid mixture is fed to a vertical vibrating baffle and after coalescence of the condensed phase, this phase is continuously discharged from the reaction space by its own weight. 2. Reactor with vibration diffuser to vapor phase unreacted ammonia. In a suitable manner, the periodically intermittent vibrations of the baffle did not produce deposits with a thickness exceeding 1 mm during the two to three-hour experiments. The use of the invention can be expected in particular in the manufacture of compound fertilizers, but also in various cherico-technological operations with other liquid-gas dispersions in which the dispersed liquid phase is highly resistant and has pseudoplastic properties. YNALEZU defective method according to item 1, consisting of an outer jacket with a gaseous phase outlet, a lid with a reaction gas-liquid mixture inlet, characterized in that the inlet space (4) is separated from the outlet space (2) by a cylindrical partition (5) connected to a vibrator 6 /.