SU743686A1 - Contact element for mass exchange plate - Google Patents

Description

one

The invention relates to devices for contacting gas (vapor) with a liquid and can be used in heat and mass transfer, absorption and distillation apparatus, in particular in the processes of desorption of bromine from bromine-containing solutions requiring high densities of reflux, absorption of bromine, iodine, chlorine from gas phases.

Known contact element containing the annular valve and the overflow device in the form of a pipe with a phase separator in the upper part and a breaker element in the bottom, coaxial hole in the base. The bore is blocked by valves. The overflow pipe is rigidly fixed with respect to the orifice and serves as a guide for the vertical movement of the valve.

The capacity of a known contact element for a liquid is 0.5-0.6 at a gas velocity in the annular combination of the web of the tray 3-4 m / s. Under heavy loads of gas and liquid, the element is choked.

A contact element for a mass transfer plate is known, comprising a torus-shaped valve, stoppers, an overflow device made with an expanded perforated upper part; overflow

the device is installed in the hole of the plate and its lower part is located under the plate, the contact element has swirlers.

5 However, the known plate has a small bandwidth for liquid and gas.

The aim of the invention is to increase the throughput of the contact element for liquid and gas.

For this, it is provided with a cone, which is open above the valve and connected to a smaller base with an overflow device, made in a larger base.

15 with a diameter greater than the diameter of the valve, which has slots for ejection of fluid at the point of connection with the overflow device, the stops are located in the middle part of the cone, and the swirlers

20 in the lower part of the cone and attached to the plate.

It is advisable to provide the upper part of the overflow device with a fencing element located at a distance, made in the form of a disk with a diameter equal to the outer diameter of the upper part of the overflow device, to be equipped with a fender element located under the lower part of the overflow device.

30 FIG. 1 depicts a contact element, general view; in fig. 2 is a section A-A in FIG. one.

The contact element is installed in the hole of the plate 1 and contains an overflow device 2, through which the annular valve 3 freely moves. A baffle element 4 is installed in the lower part of the overflow device, and a baffle element made in the form of a circular disk 6 is installed above the upper part of the perforated device 5. with a diameter equal to the outer diameter of the upper part.

A fixed cone 7 with a diameter greater than the diameter of the movable valve is installed above the valve. The cone 7 is tightly connected to the transfer device 2 and, at the junction, has slots 8 for ejection of fluid. In the middle part, the cone has valve lift stops 9, and in the lower part, elastic swirls 10. Swirls are tangential to the valve circumference and rigidly attached to the web of the plate, fixing the position of the contact device with respect to the plate 1 and the hole in it.

The contact element works as follows.

The gas (nar), the passage through the opening in the blade of the plate 1, raises the ring valve 3 to a height proportional to its flow. The maximum height of the valve cage is fixed by the limiters 9 of the stationary cone 7. Due to the scavenger formed during the gas outlet (bore) from under the valve 3, through the slots 8 in the upper part of the cone, the liquid located above the cone ejects into the space between the valve and the cone .

The vapor-enriched vapor (gas) phase at the exit from the annular gap formed by the clanan and plate 1 acquires a rotational movement due to the installed plate swirlers 10, barbathes into the liquid layer on the plate, which is in contact with it.

The gas – gas mixture from the bubbling layer through the perforated upper part of the overflow device, where the separation of the phases, enters the overflow device 2. The gas (Nova) phase through the annular gap formed by the circumference of the upper part 5 and the flat disc 6 of the baffle element enters the gas ( steam space. The senirovanny fluid is transferred to the breaker element 4 through the transverse device; At the same time, the baffle element 6 in the form of an annular disk, mounted above the upper part 5, prevents the direct flow of liquid drained from the above plate into the overflow device, mines its contact with gas (steam) on the plate, thus increasing the mass transfer efficiency.

Claims (3)

1. A contact element for a mass transfer plate containing a valve, limiters, an overflow device, made with an expanded perforated upper part, installed in the hole of the plate, the lower part of which is located under the plate, understateers, characterized in that, in order to increase the throughput of gas and fluid, it is provided with a cone located above the valve and connected by a smaller base with an overflow device, made in a larger base with a diameter large diameter valves, having slots for ejection of fluid at the point of connection with the overflow device, limiters are located in the middle part of the cone, and swirlers in the lower part cone and attached to the plate. 2. The contact element according to claim 1, characterized in that the upper part of the overflow device is provided with a fender element located at a distance, made in the form of a disk with a diameter equal to the outer diameter of the upper part of the overflow device. 3. The contact element according to claim 1 and 2, characterized in that it is provided with a baffle element located under the lower part of the overflow device.