DE2538213A1 - RADIAL FLOW WASHER - Google Patents

Description

METALLGSSELLSCHAFT Frankfurt / Main, August 26, 1975

Aktiengesellschaft - ¥ gn / HSz-

Prοv.Nr. 7662 LT

Radial flow washer

The invention relates to a radial flow cutter in one Housing arranged inlet for gas containing impurities and at least one with a spray device for washing liquid Equipped adjustable passage gap for crack treatment of the gas to be cleaned.

Radial flow scrubbers for wet cleaning of gases are, for example, from German patent specification 2 224 519 and the corresponding U.S. Patent 3,834,127 is known. They intensify the wetting of the contaminant particles in the gas Liquid droplets, e.g. water, in which the gas sprayed with liquid is forced through an annular gap. This as Washing processes known from the Venturi principle have found widespread use.

The invention has for its object to provide an improved scrubber which can be used in particular for dust-containing gas in an economical manner _o Solved is this object in a scrubber of the type mentioned in that the housing between the gas inlet and the first spraying at least one Has guide element, which diverts the gas into a flow with a rotational component and underneath a dust bag that can be emptied to the outside is arranged. This scrubber is therefore preceded by a dust separator that works according to the cyclone's operating principle, which initially enables dry dust removal from the gas to be cleaned. The dry dedusting is followed by wet washing by a known radial flow or venturi washer.

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2 b 3 8 2 ί 3

The dry dedusting and wet treatment part becomes more advantageous the device according to the invention in a common Housing arranged, whereby the device can be manufactured at a low cost.

The improved device for cleaning dusty gases can be used in various fields; it is e.g. for the top gas dedusting of high pressure furnaces is very interesting and can make the use of the previously usual dust bag superfluous do.

A further development of the scrubber is that the deflection device from a central inflow cone and guide vanes arranged between the housing wall and the inflow cone consists. The inner wall of the dust pocket can be designed as the outer wall of the entry part for wet treatment in the washer. However, in order to avoid excessive cooling in the dust bag, there can also be a distance between the two walls, the inhibits heat transfer.

With the help of the drawing, an embodiment of the washer is shown explained. It shows:

Fig. 1 is a longitudinal section through the washer,

Fig. 2 shows a section along the line II-II in Fig. 1 and

Fig. 3 is a section along the line III-III in Fig. 1 _O

The scrubber shown in Fig. 1 has a substantially cylindrical Housing 1 with an inlet 2 for the dust-containing gas to be cleaned and a clean gas outlet 3. That to be cleaned Gas flows through the scrubber roughly along the flow arrows shown in dashed lines.

The gas flow is a displacement body below the inlet 2 put in the form of the inflow cone 4 in the way. This causes the gas to flow through a ring of guide vanes 5 out, the view of which shows against the flow direction FIG. The one with its surface at an acute angle to the Vertical forming guide vanes (see. Fig. 1) direct the

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Gas flow around in such a way that it is a component of rotation receives. The gas leaving the guide vanes 5 flows therefore in a helical flow path downwards. The heavier dust particles are thereby increased Centrifugal forces moved outwards and passed into the annular dust pocket 6. The dust pocket is formed by the housing wall and a conical guide plate 6a. Which is in the Dust bag 6 collecting dry dust is continuously or discontinuously through the two dust lines 7 and deducted. The dust bag 6 has two partition walls 6b and 6c, especially to improve the mechanical strength (Fig. 3) on.

The gas, which has been freed from dust to a considerable extent, flows through the inlet 9, which is frustoconical towards the bottom Has extension 9a, in the subsequent wet treatment part of the washer. With the wet scrubbing of the gas this becomes mostly also chilled. There is a distance between the baffle 6a and the extension 9a which makes the heat transfer more difficult. Sine cooling down to the formation of condensate in the dust pocket 6 is avoided. The wet treatment part of the cleaning device is disclosed in German Patent 2,224,519 and the corresponding US Pat. No. 3,834,127 are described in detail, so that not all details are explained here need to become.

The wet treatment part of the apparatus of Fig. 1 is a two-stage radial flow washer, but a single-stage or multi-stage design is also possible. The first washing stage consists from the spray device 10 for washing liquid, the intermediate floor 11 with a central opening 12, the height-adjustable collar 13 and the baffle 14. The height adjustment of the Adjusting ring 13 is done by oil externally controllable lifting device 15 »which increases the width of the annular gap between the Opening 12 and the adjusting ring 13 is regulated. The width of this annular gap determines the pressure loss of the gas during passage

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through the central opening and the annular gap and influences the cleaning effect of the scrubber stage. The baffle 14 is held by struts 16 which are attached to the housing 1.

The second wet cleaning stage is designed in the same way as the first stage described above. It consists of the Spray device 20, the intermediate floor 21, as a truncated cone formed central opening 22, the adjusting ring 23 and the baffle 24. The adjusting ring 23 is byclx a Rod 25 in a manner not shown from the outside in the Height adjusted. The distance from the lower edge of the central Opening 22 to the upper edge of the adjusting ring 23 defines the passage gap for the gas to be cleaned, which when Flow through this area suffers a pressure loss.

The gas to be cleaned flows through the central opening 22 and the annular gap between this opening and the adjusting ring 23 with a radial, outwardly directed component over the baffle 24 along the inside of the housing 1 downward. The baffle 24, which is fastened to the housing 1 via individual baffles 26, has approximately the shape of a spherical shell. The mouth 27 of the pipe for the clean gas outlet 3 lies within of the deflection plate 24, so that the gas 4 is again forced to deflect. This improves the separation of the Scrubbing liquid from scrubbed gas; the washing liquid collects at the bottom 28 of the washer and can be discharged through the line 29.

As the wet cleaning in the washer is preceded by a dry dedusting is, the washing liquid discharged through line 29 contains considerably less dust than a scrubber known construction. The cleaning and reuse of the washing liquid is thereby made considerably easier and thereby the gas scrubbing is considerably cheaper.

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Claims (4)

Claims 1) Radialstromv / Äscher with an inlet arranged in a housing for "impurities-containing gas and at least one adjustable passage gap equipped with a spray device for washing liquid for wet treatment of the gas to be cleaned, characterized in that the housing between the gas inlet and the first spray device has at least one guide element which deflects the gas into a flow with a rotational component / and underneath a dust bag that can be emptied to the outside is arranged. 2) Washer according to claim 1, characterized in that the deflection device consists of a central inflow cone and guide vanes arranged between the housing wall and the inflow cone. 3) Washer according to claim 1 or 2, characterized in that there is a distance between the inner wall of the dust pocket and the enlargement of the inlet part for the wet treatment which opens conically in the direction of the gas flow. 4) Washer according to claim 1 or one of the following, characterized »that the dry dedusting and the wet treatment part are arranged in a common, substantially cylindrical scrubber housing. 709810/0488 Blank page