SU1648544A1 - Gas-liquid reactor - Google Patents

Abstract

The invention relates to mass transfer apparatus for carrying out reactions in a gas-liquid system and can be used in the chemical and microbiological industry. The purpose of the study is to reduce the consumption of gaseous reagent and reduce the concentration of gaseous reagent in the exhaust gases by repeated circulation of the gas phase. The gas-liquid reactor contains a vertically installed cylindrical housing with liquid and gaseous reactant zod pipes, a gas reagent distribution device located in the lower part of the reactor volume, a reacted product outlet nozzle and an exhaust gas outlet located on the reactor lid. In the middle part of the reactor below the nozzle of the output of the reacted product is guided to the body there is a conical surface facing the bottom of the reactor with an open base. The upper part of the volume bounded by the conical surface is connected by a pipe with a nozzle of a cyclone detector coaxially with respect to the pipe. A liquid reagent introduced through a nozzle is introduced into the cyclical zhelter. Pipe cut, joint with volume, limited conical surface. And the nozzle section of the cyclone ejector is located above the switchgear. The diameter of the base of the conical surface is larger than the diameter of the distribution device. 1 il. (Ls

Description

The invention relates to mass transfer apparatus for carrying out reactions in a gas-liquid system and can be used in the chemical, petrochemical and microbiological industries.

The aim of the invention is to reduce the flow rate of the gaseous reactant and decrease the concentration of the gaseous reactant in the exhaust gases by repeated circulation of the gas phase.

The drawing shows a gas-liquid reactor, the section.

The reactor consists of body 1, cover 2, pipes 3 and 4 for supplying liquid reagent.

nozzle 5 for supplying gaseous reagent, nozzle 6 for withdrawal of the reacted product, and pipe 7 for withdrawing flue gases. A distribution device 8 for supplying a gaseous reactant is located at the bottom of the reactor. Below the product outlet, the conical surface 9 is coaxial with the floor casing, the upper part of the enclosed conical surface is connected by a pipe 10 with a cyclone nozzle nozzle 11 12, into which the liquid reagent is introduced tangentially through the pipe 13. connected to the nozzle 3,

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liquid reagent feed through line 14 connected to nozzle 4.

Gas-liquid reactor operates as follows.

One of the liquid reactants is supplied to the reactor through the pipe 4 and pipe 14, the other reactant is supplied under pressure through the pipe 3 and pipe 13 tangentially into the cavity of the cyclone ejector 12. Through the pipe 5 and the distributor 8, the gaseous reagent barborates through the reaction mass filling the housing 1 reactor to the level of the nozzle 6 of the output of the reacted product. A part of the unreacted gaseous reactant collects under the conical surface 9. Inside the ejector, due to the tangential inlet, the flow of liquid reagent acquires rotational motion and, passing through the convergent nozzle, increases both the axial and tangential components of its velocity. At the level of the nozzle section 11 of the cyclone ejector there is a lower section of the pipe 10, which is located coaxially inside the ejector and through its lid extends into the upper part of the volume bounded by a conical surface 9. The rotating flow of the liquid reagent leaves the nozzle of the cyclone ejector and flow around the lower section of the pipe 10, creates a thinning inside it. The upper part of the pipe 10 is located at the top of the cavity formed by the conical surface 9 in which the unreacted gaseous reactant is collected. Due to the vacuum in the lower section of the pipe 10, the unreacted gaseous reactant is sucked out from under the conical surface and is thrown into the lower part of the reactor by a rotating flow of liquid reagent leaving the cyclone ejector nozzle. Because of this, the contact time of the gaseous reactant with the reaction mass inside the reactor increases and the portion of the gaseous reactant that reacts increases.

In addition, the intensification of mass transfer is also facilitated by the fact that the gaseous reactant from under the conical surface enters the reaction volume in the form of small bubbles, the grinding of which is caused by the large shear stresses that occur when the rotating liquid flow of the reagent leaves the nozzle 11 cyclone ejector 12. At the same time, an energetic flow in the form of a cone coming out of the ejector nozzle increases the energy of turbulent pulsations near the switchgear 8 of the gaseous reagent supply. The result is

the fragmentation of bubbles emerging from the dispenser 8 and the mass transfer in the bubbling zone is increasing.

Conical surface application 9

with a base diameter larger than the diameter of the distributor 8 of the gaseous reactant supply, contributes to trapping the conical surface of a large part of the unreacted gaseous reactant. Due to these advantages of the proposed technical solution, the gaseous reactant is used most fully and the amount of waste gases is reduced

pipe 7. This reduces the degree of harmful effects on the environment. Thus, in the proposed gas-liquid reactor, it is possible to develop the surface of mass exchange in a compact manner.

between the liquid and gas phase and by repeatedly recirculating the gas phase in the reactor bulk, increase the utilization rate of the gaseous reactant. The proposed reactor allows to reduce

the concentration of the gaseous reactant in the exhaust gases is up to 0.2 vol.% and to reduce the consumption of the gaseous reactant by 8%.

Claims (1)

Invention Formula Gas-liquid reactor containing vertically mounted cylindrical body With nozzles for introducing liquid and gaseous reagents, distribution device for supplying gaseous reagent, located in the lower part of the reactor, the outlet pipe of the reacted product and the exhaust gas outlet, located on the reactor lid, characterized in that reducing the consumption of gaseous reactant and reducing the concentrations of gaseous reactant in the exhaust gases by repeated circulation of the gas phase, the reactor is equipped with a coaxially installed outlet below the outlet pipe of the reacted product the body has a hollow conical surface facing open base to the bottom reactor installed under the conical  surface cyclone ejector with a nozzle connected by a tangential pipe to a liquid reagent inlet pipe. A pipe located coaxially inside the ejector, the upper end of which is connected to the volume of a hollow conical surface, and the lower ends of the pipe and nozzle are located above the distributor for supplying the gaseous reagent, larger diameter distribution device.