SU446283A1 - Contact device - Google Patents

Description

one

The invention relates to devices for contacting the gas and liquid phases and can be used in apparatus for carrying out distillation and absorption processes in the chemical and petrochemical industry, as well as in chemical reactors for carrying out reactions in heterogeneous systems (gas-liquid, liquid-liquid).

Known contact device containing the base, provided with steam nozzles, and located above them with an annular gap contact tubes.

A disadvantage of the known contact device is that the vapor (gas) passes through the steam pipe in a continuous flow, which leads to its uneven distribution in the contact tube.

The aim of the invention is to intensify the process by uniformly distributing the gas (vapor) flow in the contact tubes. This is achieved by the fact that each steam nozzle is made in the form of a hollow hemisphere, in the upper part of which there are radially arranged slits.

The steam nozzle can be made in the form of a cone with a smooth transition at the base; the upper part of the steam pipe can have parallel slots and between the contact tubes can be

fluid nozzles are disposed with peaks in the lower portions. Contact tubes are installed above the steam pipe with an annular gap, preferably 0.1-0.2 wide, of the height of the steam pipe.

FIG. 1 shows the proposed contact device; in fig. 2 - contact device in the case of countercurrent motion of contactable phases.

The contact device contains the base 1 with steam nozzles made in the form of a hollow hemisphere 2, in the upper part of which there are slots 3. The contact tubes 4 mounted on the brackets 5 are installed above the nozzles with a gap.

The contact device can operate both in direct and countercurrent motion of the contacting phases.

When the gas-liquid is flowing, the gas-liquid mixture enters under the steam pipe and through the slots in it enters the cavity of the contact tube. Due to the movement of the gas-liquid flow in the cavity of the contact tube, an increase (suction) of the mixture occurs through the annular gap formed by the steam pipe and the lower cut of the contact tube. In the contact tube is mixing and contacting phases. After exiting the gas-liquid

of the mixture from the tube, it moves down to the annular gap between the steam pipe and the contact tube. Then the mix (nodsos) of the main flow again occurs. The cycle is repeated several times (intensive multiple circulation). After repeated circulation, the mixture enters the next step of contacting the nodes of the steam pipe.

When the countercurrent fluid is fed from above through the liquid pipes, and gas (steam) enters the steam pipe and through the cracks in it enters the cavity of the contact tube. Due to the movement of the gas flow in the cavity of the contact tube, the fluid is entrained (injected) through the annular gap between the steam pipe and the lower cut of the tube. In the contact tube is mixing and contacting the gas (vapor) with the liquid. After the gas-liquid mixture leaves the tube, a partial separation takes place; the gas (vapor) rushes to the vychaljajushchego contact device. The liquid with residues of the gas phase moves down to the annular gap between the steam pipe and the lower section of the contact tube. Then the entrainment (suction) of the mixture by the gas (vapor) flow occurs again. The cycle is repeated several times (multiple intensive circulation). After repeated circulation, the liquid through the liquid pipe enters the underlying contact device.

Subject invention

A contact device comprising a base provided with steam nozzles and contact tubes arranged above them with an annular gap, characterized in that, in order to intensify the process, each steam nozzle is made in the form of a hollow hemisphere fitted in the upper part with radial slots.