KR800001065B1 - Apparatus for use in absorbing a gas in a liquid - Google Patents

Abstract

A falling- film absorber, having a liq. - cooled tube bandle, has an adiabatic section above the top end of the bundle with an absorption liq. feed near the top and horizontal, vertically stacked plates over which the feed liq. trickles so that the gas rises through a tortuous path. The apparatus can be used to absorb heat- developing gases, esp. NH3, from a gas mixt. by water.

Description

Apparatus suitable for absorbing heat-dissipating gaseous substances using liquid media

1 is a block diagram of a conventional apparatus.

2 is a block diagram of an apparatus of the present invention.

The present invention relates to a device suitable for absorbing gaseous substances which release heat using a liquid medium, in particular a device suitable for absorbing ammonia in a gas mixture as water.

A device for absorbing a liquid medium of a gaseous substance that releases heat can be used according to conventional methods and will be described with reference to conventional methods.

It is known from Italian patent specifications 891,098 907,085 and 953,035 that absorbing ammonia with water can be carried out with a vertically installed film-exchanger.

The main form of this known device used a single surface to simultaneously perform two operations: material transfer and heat-exchange (absorb heat of NH ₃ in water).

The use of such a device is particularly useful in all cases where the transfer of material occurs in the removal of heat, especially in the operation of absorbing NH ₃ into water.

However, such a device has the disadvantage of causing an increase in cost and weight since it must have a considerable length in order to achieve the most complete absorption of the gas.

It has been found that the length of the film-absorber can be significantly reduced by the absorption heat being transferred to the gas so that the gas absorbs the final residual amount of ammonia in one or more of the insulation plates causing the thermal control action.

The apparatus of the present invention comprises an inner chamber surrounding a vertical tube, two tube plates for holding the tubes, one or more tubes for injecting absorbing liquid at the tube top point, and a film in the tube. Apparatus for dispersing (conventional) in form, connected to one or more gas intake tubes, internal chambers, tube plates and internal spaces contained between tubes for absorbing gas at or near the interior of the chamber One or more inlet and outlet tubes from the lining envelope for liquid coolant, one or more outlet tubes for the resulting solution, one or more tubes for the discharge of unabsorbed gas, and a pipe for spraying the absorbing liquid One or more plates in the inner surface of the inner chamber of a pipe and one or more inlets on a constant plate for absorbing liquid.

The apparatus of the present invention can be more readily understood with reference to the attached FIGS. 1 and 2.

In FIG. 1, 1 is an inner chamber, 2 is a tube bundle, 3 and 4 are tube plates, 5 is ammonia-containing sesame seeds, 6 is water or another absorbent liquid, and 7 is ammonia obtained. Hydrogenation solution, 8 is ammonia free gas and 9 and 10 are inlet and outlet for cooling liquid, respectively.

The numbers 1-10 have the same meaning as described above, and 11 is water (or other absorbent liquid) absorbing ammonia in the plates 12, 13, 14, 15 and tubes and water injected through 6 is It can be mixed thoroughly with the injected water.

The results of the two tests conducted with the apparatus of FIG. 2 as indicated in Example 2 in which 1 and the insulating plate act on the implementation of the insulating plate member are listed in the table below.

This result is not given as a limitation of the present invention.

Example 1

In the above-mentioned method, the addition of the insulation board results in the following advantages: the amount of NH ₃ absorbed is increased. The residual NH ₃ content is reduced by almost half. A more concentrated solution can be obtained.

In order to do the same in conventional film-absorbers without the insulation board arrangement, the exchange surface must be increased significantly.

Additional attention should be paid to the temperature increase of the gases emerging from the insulation plates when compared to what occurs only in the film-device. In practice, the temperature increases from 30 ° C to 50 ° C, and the increase in temperature can recover all relevant heat and make improvements in all realizations of the absorber.

Claims (1)

As detailed in the text. Inner chambers surrounding the vertical tube, two tube plates for fixing the tubes, one or more tubes for injecting the absorbing liquid at the point of the tube, and a conventional method for dispersing liquid in the form of a Philip in the tube. One or more tubes for the intake of absorbing liquid at or near the base of the chamber, one or more pipes for the inlet and outlet of the intake chamber from the lining for liquids obtained from absorption. One or more plates arranged on the inner surface of the inner chamber on the conduit to spray the plates through the one or more inlets on the upper tube so as to dissipate sorbents, in particular liquids using water to release heat Apparatus suitable for the absorption of substances, in particular ammonia.

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