SU700158A1 - Apparatus for contacting gas or vapor with liquid - Google Patents

Description

I

The invention relates to the chemical industry and can be used in mass-exchange apparatus, for example, absorbers, distillers, distillation columns, as well as for cleaning dusty gases.

Injecting (impact-spray) contact devices are known, in which gas (steam) is directed through scaled slots.

The disadvantages of these devices are that they have a short phase contact time and low fluid retention.

A contact device for the interaction of gas (vapor) with a liquid is known, which contains a base with directional slots for the passage of gas (vapor) and a baffle plate of a curved shape located along the entire length of the overflow device, which eliminates the splash from the surface of the plate, however such a plate does not provide swirling threads.

A known flat plate, containing, and a horizontal base with directional slots for the passage of gas (steam), moreover

the slots of adjacent rows are directed in opposite directions perpendicular to the fluid flow. Vertical partitions attached parallel to the movement of the liquid flow are attached to the lateral cross-bases of the base. Such a contact plate design allows an increase in the residence time of the liquid on the plate compared to other plates.

However, this design is known - the design of the contact device has a number of drawbacks: at high gas (steam) speeds in the free section of the device (more than 1.5 m / s) at the moment of the gas (vapor) of the liquid mixture striking the vertical partitions, a large amount of spray which causes significant liquid entrainment to the upstream contact device; Due to the high gas (vapor) velocities, the contact time between the phases is insignificant.

These drawbacks lead to a noticeable decrease in the effectiveness of the contact device.

Claims (2)

The aim of the invention is to intensify the process by providing an organized rotating flow and expanding the range of operating gas (steam) speeds. This goal is achieved by the fact that, in the proposed contact device, the base is made semicircular cylindrical, the side wall, towards which the slots are directed, is made along an arc of a circle with a radius equal to the base radius, and the other side wall is made along a curvilinear surface, for example, cycloid. This intensifies the process by creating an organized rotating flow, expands the range of operating speeds, increases the residence time of the liquid and gas (steam) on the contact device and reduces the entrainment of liquid from the contact device due to centrifugal separation of the liquid and gas (steam). FIG. 1 shows a contact device for the interaction of a gas (vapor) with a liquid; a plan; in fig. 2 - the same in axonometry. The contact device can be assembled from several contact devices located along the fluid flow. The contact device contains a base 1, made of a semicircular cylindrical with directional slots 2 for the passage of gas, and partitions 3 and 4 are attached to the side edges of the front, and the base and drain pockets 5 and 6. The base 1 is equally perforated perpendicularly fluid flow by unidirectional slits. The side partition 3 is made along an arc of a circle with a radius equal to the radius of the base, and the partition 4 is made along a curvilinear surface, for example, a cycloid one. The contact device works a little better. Gas (steam) enters the contact device through the slots 2. At a sufficiently high velocity of gas (vapor), the liquid, which is transferred to the contact device from the receiving pocket 5, will be picked up by it, fragmented and in the form of jets will begin to move along the surface of the partition 3 along a helical line, creating a vortex flow. During the movement of fluid through the septum 3, it is braked on the steak, which leads to a sharp increase in the relative velocity of the phases. (liquid holes, reaching the edge of the septum 3 under the action of centrifugal force, are thrown against the wall of the partition 4, crossing the gas during its movement (vapor: flow and intensively interact n. h. Liquid, hitting the burnout wall. 4, flows down over it onto the base, and then the process repeats, increasing the time the liquid stays on the contact device. In this way, the gas (ion) is reciprocated with the liquid on the perforated part of the contact device. gas-liquid layer, in the ascending spacer Ke Zin cross current, in the space between the edge of the baffle wall 3 and the partition 4, creating developed phase contact surfaces. The gas (steam; and a small amount of splashes captured by it (main fluid separation under the action of centrifugal force) rushes up the wall of the partition 4 . When the upper part of the partition is reached, the 4 pairs are separated from the spray and go to the overlying contact device, and the liquid passing the contact device flows into the drain pocket 6. The invention The contact device for interfacing A gas (vapor) with a liquid containing a base with perpendicularly directed .40 liquid flow cuts, to the side edge of which partitions are attached that are vapor-lined but not fluidized, characterized by the fact that with intensified object; .1 process by providing an organized rotating flow and spreading the range of gas (steam) gas flow rates, the base is made semicircular cylindrical, the side partition, towards which the slots are directed, is made along an arc of a circle with a radius m ravny.m radius of a base, and the other side of the partition BE polyene curved surface, such as a cycloid.