RU2620119C1 - Water degasser for carbon dioxide removal - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: water degasser for carbon dioxide removal comprises a housing 1 rectangular or circular in plan, feeding 2 water line, diverting 3 degassed water line, air feed header 4, air-distributing pipes 5 with holes, perforated bottom 6 for uniform water withdrawal, subbottom space 8, drainage pipe line 9, series of horizontal partitions 7 with passages in a staggered order, mounted along the height of degasser.

EFFECT: invention enables to improve the degasification efficiency during barbotage of the driving water volume.

2 cl, 3 dwg

Description

The invention relates to devices for water degassing, used in technologies for the purification of natural water from carbon dioxide (free carbonic acid).

From the prior art, the prototype adopted a bubbler degasser in free volume (Kastalsky A.A. Designing devices for removing dissolved gases from water during water treatment [Text] / A.A. Kastalsky. - M .: Gosstroyizdat, 1957. - 186 p.) containing a case, rectangular or round in plan, in which the volume of water is purged with air during their joint movement, pipelines for supplying source water and air, pipelines for discharging treated water.

The disadvantages of this bubbler degasser with bubbler in the free volume include the low effects of gas removal at a fairly high cost of air compression.

An object of the invention is to develop a device that can increase the efficiency of gas removal during the bubbling of a moving volume of water and meets the set requirements for the effectiveness of degassing water.

The technical result is achieved by the fact that a water degasser for removing carbon dioxide, including a housing 1, a feed water supply pipe 2, a degassed water discharge pipe 3, an air supply manifold 4, air distribution pipes with holes 5, a hole bottom for uniform drainage of water 6, a pallet space 8, drainage pipe 9, further comprises rows of horizontal partitions 7 with passages in a checkerboard pattern.

The task underlying the present model of the degasser, with the achievement of the claimed technical result, is solved by the fact that the degasser is equipped with rows of horizontal partitions installed along the height of the degasser, overlapping the cross section of the apparatus with air and water passages organized in a checkerboard pattern. The installation of horizontal baffles in the water degasser provides a change in the trajectory of the gas-liquid flow, its structure, creation of rarefaction and intensive turbulization zones, leads to periodic enlargement and fragmentation of air bubbles, with an increase in the contact area of the water-air phases, intensifies the convective diffusion of gas, and molecular diffusion by reducing the thickness of the boundary layer at high countercurrent speeds of water from 20 to 120 m / h.

The present model of the degasser is explained and described further on the basis of the presented drawings, where:

- FIG. 1 shows a general view of a water degasser for removing carbon dioxide;

- FIG. 2 is a view along arrow 1 in FIG. one;

- FIG. 3 is an arrow view of FIG. one.

In graphic materials, the corresponding structural elements of the degasser are indicated by the following positions:

1 - housing;

2 - water supply pipe;

3 - discharge pipe degassed water;

4 - air supply manifold;

5 - air distribution pipes with holes;

6 - hole bottom for uniform drainage of water;

7 - rows of horizontal partitions with passages in a checkerboard pattern;

8 - pallet space;

9 - drainage pipeline.

The carbon dioxide water degasser comprises a housing 1, a water supply pipe 2, a degassed water discharge pipe 3, an air supply manifold 4, air distribution pipes with holes 5, a hole bottom for uniform water drainage 6, rows of horizontal partitions with staggered passages 7, a pallet space 8, drainage pipe 9.

Various modifications and improvements are allowed that do not go beyond the scope of the device defined by the attached formula. In the general case, a cloisonne degasser can consist of a rectangular 1 or round case, a hole 5 (slotted, cap, porous) air distribution device, nozzles for supplying source water 2 and air 4, removal of treated water 3, the required number of rows of horizontally arranged transverse partitions 7.

Degasser works as follows.

Degassed water is supplied through pipeline 2 to the upper part of the degasser, passes through passages created by horizontal partitions 7 located at the calculated distances (h) in a checkerboard pattern, as a result of which the water movement is tortuous. Water that has passed all levels of the partitions 7 passes through the hole bottom 6, enters the pallet space 8 and is discharged from the bottom of the degasser through the pipe 3. The water is distributed evenly over the area by partitions installed in height, the water is collected uniformly through the holey intermediate bottom 6, which for small sizes of the degasser may be absent. Air is supplied to the air supply manifold 4, then, distributed over the air distribution tubes 5, dispersed over the area of the degasser into the volume of water, then passing through all levels of the transverse partitions 7, it leaves through an open water mirror with the subsequent removal of the gas mixture from the building through exhaust ventilation.

The masses of water and air countercurrently moving at high speeds contribute to the formation of rarefaction zones, as a result, when the air flow is inhibited on the approach to the partitions, as well as in the rarefaction zones, air bubbles merge and enlarge, and then, after the septum, due to the action of the counterflow force the formation of zones of turbulence and intense fragmentation of bubbles, resulting in intensification of convective-diffusion processes.

Claims (2)

1. Water degasser to remove carbon dioxide, containing a rectangular or round in plan plan housing in which the volume of water is purged with air while they are moving together, a water supply pipe, a degassed water discharge pipe, an air supply manifold, air distribution pipes with holes, a hole bottom for uniform discharge water, drainage space, drainage pipeline, characterized in that it is equipped with rows of horizontal partitions with staggered passages installed in height gasifier. 2. A water degasser for removing carbon dioxide according to claim 1, characterized in that it operates in a mode of increased countercurrent speeds of water from 20 to 120 m / h.

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