MIST ELIMINATOR

Abstract

A mist eliminator is described for separating liquid and/or solid particles out of a gas stream. The mist eliminator has various functional elements that are arranged in the gas stream direction in the gas stream path in three or more levels (5, 6, 7) of which the first level (5) comprises flow deflection elements (3) and the other levels (6, 7) each comprise liquid/solid particle collection and discharge elements (8, 9). The mist eliminator is characterized in that it has a particularly good separating efficiency with a low pressure loss and a small installation depth.

Claims

1. A mist eliminator for separating liquid and/or solid particles out of a gas stream and comprising a housing having an inlet for the gas stream carrying liquid/solid particles and an outlet for the gas stream stripped of the liquid and/or solid particles and for the liquid and/or solid particles, and a plurality of functional elements in a flow path of the gas stream carrying liquid/solid particles, the functional elements being offset in a flow direction in a furthest upstream level in the flow direction includes a plurality of juxtaposed and spaced pure flow deflection elements, at least one intermediate level having a plurality of juxtaposed and spaced first liquid/solid collection and discharge elements, and a furthest downstream level in the flow direction having a plurality of juxtaposed and spaced further liquid/solid particle collection and discharge elements, the functional elements of each of the different levels being spaced from one another and overlapping partly laterally with respective functional element of upstream or downstream levels, the functional elements of the upstream level as well as the first liquid/solid particle collection and discharge elements of the second intermediate level having downstream faces extending in an inclined or curved manner toward center lines of intermediate spaces between the functional elements of the next downstream level.

2. The mist eliminator according to claim 1, wherein the downstream faces of the flow deflection elements and the liquid/solid particle collection and discharge elements form a point on the center line of the intermediate spaces between the functional elements of the next level.

3. The mist eliminator according to claim 1, wherein the flow deflection elements have a rhombic cross-section.

4. The mist eliminator according to claim 1, wherein the liquid/solid particle collection and discharge elements are formed as box-like collection elements at least partly open at the upstream side.

5. The mist eliminator according to claim 1, wherein the liquid/solid particle collection and discharge elements of the second and possibly further level each have a deflection ridge on their downstream face.

6. The mist eliminator according to claim 5, wherein the deflection ridges are formed as small deflection points.

7. The mist eliminator according to claim 1, wherein a space serving for deflecting the gas stream released from liquid and/or solid particles laterally is provided in the housing downstream of the downstream level.

8. The mist eliminator according to claim 1, wherein the flow deflection elements have an opening angle of 60-120° on the upstream side.

9. The mist eliminator according to claim 1, wherein the downstream faces of the flow deflection elements are concavely curved.

Description

[0021] In the following the invention is described with reference to an example in connection with the drawing in detail. In the drawing

[0022] FIG. 1 shows two perspective views of a mist eliminator with a lateral inlet and horizontal through flow; and

[0023] FIG. 2 is a schematic plan view onto three levels of the functional elements of the mist eliminator.

[0024] The mist eliminator shown in FIG. 1 in two spatial views has a housing 1 whose dimensions are for instance 280 mm×140 mm×75 mm. The housing has an intake opening 2 on one side surface over which a plurality of juxtaposed and spaced flow deflection elements 3 extend vertically. A gas stream carrying liquid and/or solid particles enters the intake opening 2 in the mist eliminator and is separated from the liquid and/or the particles in the interior thereof. Then the particle-free gas stream and the liquid and/or the particles are discharged from the housing via suitable outlets (not shown here). For instance, such a mist eliminator can be downstream of a heat exchanger.

[0025] The plan view shown in FIG. 2 shows the inner construction of the mist eliminator. The arrow indicates the flow direction of the gas stream. The gas stream carrying liquid and/or solid particles enters the housing of the mist eliminator through the schematically shown openings 2 and passes at least three levels 5, 6, 7 of functional elements one after the other in the gas-flow direction.

[0026] The first level has a plurality of juxtaposed and spaced lozenge-section flow deflection elements 3 that have a pure flow deflection function and accelerate the entering gas stream. The flow deflection elements 3 that are of lozenge cross-section have two slightly concavely curved downstream faces 4 merging at a point directed along the center line of the intermediate spaces of the functional elements 8 on the second level 6. The functional elements of the second level 6 are formed as first liquid/solid particle collection and discharge elements 8. In detail, these functional elements have a box-like cross-section and a nearly completely open upstream side (flow side) for collecting the separated liquid droplets and/or particles. A ridge 10 having with an apex is formed on the downstream faces of these functional elements of the second level 6. These ridges fulfill a guiding function and guide the stream into the intermediate spaces between the functional elements of the next identical or last level 7. These functional elements are also designed as liquid/solid particle collection and discharge elements 9 and have a box-like cross-section with nearly completely open upstream sides (flow side).

[0027] The mist eliminator functions in the following manner:

[0028] The gas stream carrying liquid and/or solid particles enters the mist eliminator housing 1 through the intake opening 2. It impinges onto the rhombic-section flow deflection elements and is divided by them and fed past the open upstream sides (flow sides) into the adjacent liquid/solid particle collection and discharge elements 8 of the second level 6. Liquid droplets and/or solid particles are separated by these elements 8 and deflected downwardly in the elements 8, i.e. perpendicularly with respect to the plane of the drawing. Then the deflected gas stream is guided along the curved downstream face 4 of the flow deflection elements 3 into the intermediate space between the functional elements 8 of the second level 6 (that can be possibly be in more than one row) and impinges onto the open upstream sides (flow side) of the liquid/solid particle collection and discharge elements 9 of the third level 7. Here, a separation of further liquid droplets takes place that are then discharged downward in the elements 9. Then the deflected gas stream moves over the downstream faces of the elements 8 that form a ridge 10 provided with an apex into the intermediate spaces between the elements 9 and from there laterally toward the outlet of the gas stream stripped of the liquid.

[0029] The functional elements of the at least three levels 5, 6 and 7 are offset with respect to one another and overlap only slightly so that only a small blocking of the gas stream passing the elements occurs. This way there is only a small loss of pressure. The functional elements of the second and possibly further level 6 and last level 7 cause a separation of liquid droplets or solid particles in two successive levels so that, despite of the only slight blocking of the gas stream, a very good separation effect with a small loss of pressure is obtained. Furthermore, an especially small installation depth is taken up.