DE1267195B - Device for wet cleaning of gases - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

Number:
File number:
Registration date:
Display day:

BOId

German class: 12 e- 2/01

1 267195
P 12 67 195.3-45
June 19, 1962
May 2, 1968

The invention relates to a device for Naßremigen gases, consisting of a Partially filled with liquid chamber, into which a vertical gas supply pipe up to close to the liquid surface sufficient to make dust-containing gases essentially perpendicular to the surface of the liquid to be able to direct and then cause in this chamber, essentially perpendicular to the liquid surface to flow upwards again and thereby entrain liquid droplets, which the Pick up dust as the gas flows off the surface of the liquid, whereupon the liquid droplets are separated from the gas stream and fed back to the liquid.

There are devices for the present purpose known in which the contaminated gas by a central inlet pipe against the liquid surface and then upwards again from this flowing an annular passage formed by the gas inlet pipe and a jacket, which concentrically surrounds the pipe. A deflector or baffle plate is provided above the shell, which changes the direction of flow of the gas flow for the purpose of separating the liquid droplets causes the return outside of the jacket into the liquid container. Here can Although the effect of the known devices up to a certain amount by changing the Fluid level are influenced, whereby the amount of liquid entrained and thus the Degree of excretion is changed. However, this control option is relatively limited.

It is also known per se to use Venturi tubes to clean the gas before it enters to wet in these Venturi tubes and to attach a separator after the Venturi tubes.

The invention has set itself the task of designing a device of the present type in such a way that that it is possible to regulate its mode of action to a greater extent and more satisfactorily. Included it was assumed with the smallest possible dimensions for the overall structure of the device accommodate a larger amount of individual separators, so that with a significantly reduced change of the liquid level the efficiency of the for a certain type or concentration of dust desired degree can be adjusted.

In order to achieve the object set, the device mentioned at the beginning is designed according to the invention in such a way that that a cylindrical jacket that is immersed in the liquid and is open at the top and bottom with a larger diameter than the gas supply device for wet cleaning of gases

_s applicant:

AB Bahco, Stockholm
Representative:

Dr.-Ing. H. Fincke, Dipl.-Ing. H. Bohr
and Dipl.-Ing. S. Staeger, patent attorneys,
8000 Munich 5, Müllerstr. 31

Named as inventor:

Karl Axel Göran Gustavsson,

Enköping (Sweden)

Claimed priority:

Sweden June 21, 1961 (6484)

processing pipe is arranged concentrically to it so that its upper edge is essentially the same Height is like the lower edge of the gas supply pipe and that is concentric to the gas supply pipe Outside the ring-shaped jacket, Venturi tubes with an unobstructed, circular flow cross-section are provided with baffles at the upper end so that their lower inlet in height of the outlet of the gas supply pipe and that the upper outlet of the Venturi tubes through a into the Liquid-immersed partition separated from the space between the gas inlet and the venturi tubes is.

Although it is a separator already known in which a gas supply pipe with a substantially Surrounding the jacket ending at the same height and concentrically outside the annular space pipe socket to discharge the gas can be provided through a wall of the space between gas inlet and pipe socket are separated. However, this is a dry separator of the deflection type, which is connected in series with a wet separator of the simplest type, so that one externally comparable construction practically no suggestions for a wet separator according to the invention Art could have given. In the known separator, a low speed is sought of the gas when it hits the surface of the liquid, so that despite its deflection from

809 574/361

the same without the entrainment of drops of liquid
derived through the intended outlet opening
can be.

In contrast, in the invention, the gas flow
can be used by the supply pipe, which ends near the liquid surface, the
To atomize liquid into small liquid droplets, which are transported on with the gas
can.

arranged pipe parts 11, which for receiving Venturi tubes 12 with an obstacle-free, circular Cross-section, which are suspended on the pipe parts 11 by means of flanges 13. Above each 5 Venturi tube 12, an associated baffle 14 is arranged, which in the radial direction over the the tube 12 in question protrudes and has a downwardly directed circumferential web 15. Preferably If, according to the invention, the gas supply baffle 14 is designed as a removable unit, each pipe 12 with the associated umIf. to tube should correspond to at least two Venturi tubes, for this purpose each tube 12 is on the relevant then several baffles 14 would have to be attached by means of webs 16 and each with the known device one hundred such as treatment zones for the baffle plate 14 on a vertical plate 17 on-gas-liquid mixture serving Venturi tubes, which in turn is attached to a cover, are provided, but this is actually not the 15 which on an associated opening 18 in the upper case is. In addition, in the case of the invention, an immersion part 4 can be placed. That way you can wall «, d. H. one immersed in the liquid, each of the said units through the respective one Partition wall, which can be removed from the cleaner from the known front opening 18, direction does not show. This wall makes it possible, The tubes 12 are arranged in such a way that that the liquid is returned to the container, ao its lower edge substantially at the same level without disturbing the flow into the venturi tubes. with the lower edge of the gas supply pipe 6 be-so far a device that is also known.

tion facilities with venturi tubes are used, the lower part of the cleaner is made with a liquid also a person skilled in the art 19, z. B. water filled into which the partition 8 do not give the thought of immersing such inserts 25 and the jacket 10. If now impurities to use the pipe socket of the nigt dusty gas through the inlet 5 and the previously mentioned known device tube 6 is introduced, this liquid is in the to replace such venturi devices. Space inside the partition wall 8 through the gas man would have to be displaced without knowledge of the inven- tion, so that the liquid within the According to the intended goal - on the thought 30 partition wall 8 a lower level 20 opposite ken come, the direction of flow in this pipe a higher level 21 of the liquid in the ringren reverse to omit the inlet pipe and shaped space between the partition wall 8 and the To arrange partitions, taking into account- housing 1 occupies. The amount of liquid in the The fact is that the second known pre-cleaner should be selected so that the status 20 direction of the inlet of the Venturi tube well below 35 is just below the lower edge of the tubes 6 and of the water level in the tank. It would also be located at 12. Displaced within the inner jacket 10 it is necessary to get the idea that the inflowing gas is the liquid in such a way that it becomes the inlets of the venturis sets a surface 22 at the same level.

how the mouth of the inlet pipe should be. The If the contaminated gas on the surface of the

Conversion of the known dry separator to 40 liquid, then part of the dust an embodiment of a wet separator according to received and separated from the liquid.

The gas also entrains liquid droplets, then flows through the free space between the Liquid surface and the lower edge of the 45 Venturi tubes 12 and through these tubes 12 upwards, where it also pulls liquid with it in the form of droplets. During the upward movement through the tubes 12 the liquid droplets pick up dust and are then carried by the gas

In the example shown, a cylindrical housing 50 is used for the sudden change in the direction of flow 1 with a tapering base 2, which is separated by the deflection plates 14 and their seen, at which a bottom outlet 3 is located, circumferential webs 15 is effected. The purified gas as well as with an upper part 4, which escapes by a gas through the outlet 7, while the liquid inlet 5, which is concentrated with a droplet concentrating to the housing 1 together with the dust from the see inlet or supply pipe 6 for the liquid to be cleaned in the space between the partition wall 8 and lowing gas is in communication, and a gas outlet 7 of the housing 1 are added. The dust is formed. settles on the bottom of the cleaner, from where it came from

Inside the housing 1 are a concentric one through which the outlet 3 can be removed. Partition in the form of a jacket 8 as well as an upper To increase the speed of the gas is

conical partition 9 is provided, which with the 60 the gas supply pipe 6 at its lower end Partition wall 8 and connected to the gas inlet pipe 6, preferably tapered. Likewise is through that is. Within the jacket 8 there is concentrically a venturi tube 12, first an increase and then inner jacket 10, which is open at the top and bottom, is achieved with a decrease in the gas velocity, a larger diameter than the gas supply line. The operation of the device can thereby

tube 6 is provided, the upper edge of which can be regulated in a way that the liquid level 20 essentially at the same height as the lower edge with respect to the Venturi tubes 12 by means of suitable, of the gas supply pipe 6 is located. The conical means not shown changed. It was found, Partition wall 9 has a number of circles around it, so that even a small change in the liquid

the invention is therefore also necessary for a person skilled in the art
in the present field so many steps of thought that the solution of the invention is not without
inventive inspiration is to be enabled.

The invention is based on a
schematic drawing for an embodiment
explains what the separator of this example is in
shows axial longitudinal section.

Stand with respect to the lower edge of said tubes 12 a significant influence on the Amount of liquid that the gas has with it during its upward flow from the liquid tears, and thus on the degree of dust separation itself.

Claims (1)

Claim: Device for wet cleaning of gases, consisting of a partially filled with liquid Chamber into which a vertical gas supply pipe comes close to the surface of the liquid sufficient, characterized in that a cylindrical, immersed in the liquid, upwardly and downwardly open jacket (10) with a larger diameter than the gas supply pipe (6) is arranged concentrically with it in such a way that its upper edge is substantially is at the same height as the lower edge of the gas supply pipe and that is concentric to the Gas supply pipe (6) outside the annular jacket Venturi pipes (12) with unobstructed, circular flow cross-section with baffles (14) at the upper end are that their lower inlet is at the level of the outlet of the gas supply pipe and that the upper outlet of the venturi tubes (12) through a partition that is immersed in the liquid (8, 9) is separated from the space between the gas inlet and the venturi tubes. Considered publications:
German Patent No. 228 296;
French patent specification No. 1259 844. 1 sheet of drawings 809 574/361 4.68 ® Bundesdruckerei Berlin