JPH0140946B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for classifying and collecting mist.

In recent years, in order to measure mist, it has become necessary to classify and collect it. For example, the mist discharged from the outlet of a scrubber widely used in dust collectors and desulfurization equipment needs to be classified and collected in order to evaluate the performance of the scrubber.

On the other hand, as a device for classifying and collecting dust, for example, a device called a cascade impactor has been known. This device ejects gas containing dust from a nozzle, collides the dust with a collection plate placed opposite the nozzle, collects the dust on the collection plate, and connects the nozzle and collection plate to the nozzle. By gradually decreasing the diameter of the filter and the interval between the collecting plates and providing multiple stages, it is possible to classify and collect the dust on each collecting plate. However, when such a dust collection device collects mist or dust containing mist, the liquid accumulated on the collection plate due to the collection of mist is removed from the collection plate by the jet stream from the nozzle. If the dust contains mist due to outflow or scattering, the above-mentioned dust collection device cannot be used.

The present invention makes it possible to classify and collect mist or dust containing mist by improving the collecting plate in such a dust collecting device. Then, an inlet for introducing gas containing the mist to be classified and collected is provided in the cannula at one end, a suction cover with a suction port is connected to the cannula at the other end, and a nozzle is installed in each cannula. At the same time, a mist collector is placed opposite to the nozzle nozzle, and the inner diameter of the nozzle and the distance between the nozzle and the mist collector are gradually adjusted from the cannula at one end to the cannula at the other end. The above-mentioned mist collector is attached to a collecting plate with a rising wall around the disk facing the nozzle and a mist flow hole bored inside the rising wall, and to the back of the collecting plate. It is characterized by comprising a mist reservoir.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The mist classification and collection device shown in Fig. 1 is constructed by connecting a large number of mantle tubes 1, 2, 3, ..., 5, 6 so that they can be brought into contact and separated, and contains the mist to be classified and collected. A first sleeve 1 is provided at the upper end with an inlet 10 for introducing gas and a pressure tap 11 for mounting a pressure sensor, and second, third, ... having the same structure are attached to this sleeve 1. 2, 3, . A suction cover 8 provided with 13 is attached.

As a mutual connection means for each of the above-mentioned mantle tubes, connection tubes, and suction cover, the fitting portions of both are airtightly joined by an O-ring 14, and a threaded rod rotatably attached to the support portion 15 of one of the mantle tubes, etc. 16 is shown in which a wing nut 18 that engages with the other jaw 17 is screwed, but any other coupling means may be employed.

Each of the above-mentioned mantles has a nozzle 2 inside it.
1, 22, . . . , 26 are fixed, and a mist collector 31, 32, . , 22a, ..., 26a, but these nozzles
The inner diameters of a,..., 26a gradually become smaller from the first cannula 1 provided with the mist inlet 10 to the lowermost cannula 6 leading into the suction cover 8.
The distance between the mist collectors 1a, 22a, ..., 26a and the mist collectors 31, 32, ..., 36 facing them is also formed so as to gradually become smaller from the first cannula 1 to the lowest cannula 6. There is.

As shown in detail in FIGS. 2 and 3, each of the above-mentioned mist collectors consists of a collection plate 40 that is placed opposite to the spout of the nozzle and a mist reservoir 50 that is installed behind the collection plate 40. It is composed of The collection plate 40 is provided with a rising wall 42 around a circular plate 41 made of stainless steel or the like.
A suitable number of mist flow holes 43 are bored inside the disk, and a plurality of legs 44 that are held between the upper and lower mantle tubes are protruded in the radial direction around the circumference, and the mist flow holes are formed on the lower surface of the disk 41. Mist reservoir mounting wall 45 surrounding hole 43
It is installed vertically. On the other hand, the mist reservoir 5 is fixed to the mist reservoir mounting wall 45 with screws or the like.
0 has a container-shaped container 51 made of stainless steel or the like, and air vent holes 52 are provided at appropriate places around the container.
It has a hole in it. This air vent hole 52 is
This is to discharge the gas that has flowed in together with the liquid from the mist flow hole 43 of the collection plate 40 to the outside, and to prevent the liquid accumulated in the container 51 from flowing out from the air vent hole 52. ,
For example, it may be installed behind the mist reservoir mounting wall 45.
Care must be taken to provide the air vent hole 52 in a position that is difficult for the liquid in the container 51 to access.

The mist flow hole 43 in the collection plate is the fourth
As shown in the figure, it may be elongated along the inside of the rising wall 42 around the disk 41.

In the mist classification and collection device having the above configuration, when suction is performed from the suction port in the suction cover 8 with the introduction port 10 of the cannula 1 open to the gas containing the mist to be classified and collected, the cannula 1
The gas is ejected from the nozzle 21 toward the mist collector 31, and the mist particles with a large inertial force, that is, the mist particles with a large particle size collide on the collection plate 40 and are collected. The mist flows into the next-stage cannula 32 through the surroundings of the mist 40, and collection of the mist is repeated in the same manner. In this case, because the inner diameter of the nozzle's spout is gradually reduced and the distance between the spout and the collection plate is gradually reduced, mist with a smaller diameter is collected as it goes to the later stage. In other words, the mist is classified and collected in the multistage cannula.

The mist particles that collide with the disk 41 grow together with the following mist particles, but the droplets formed thereby are exposed to the jet airflow from the nozzle and are pushed around the collection plate 40. You will be swept away.
However, since a rising wall 42 is provided around the disk 41 and a mist flow hole 43 is bored inside thereof, the droplets are swept away by the airflow ejected from the nozzle and flow from the mist flow hole 43 into the mist reservoir. There is no possibility that it will flow into the interior of the 50 and be scattered elsewhere.

The droplets that have flowed into the mist reservoir 50 are taken out and weighed after a required period of time, thereby allowing the mist to be classified and measured.

As is clear from the detailed explanation above, according to the present invention, a dust collection device that cannot be used for collecting mist is used, and the collection plate is replaced with a mist collector with a simple structure. By simply doing this, you can easily and accurately classify and collect mist.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the configuration of a mist classification and collection device according to the present invention, FIGS. 2 and 3 are a plan view and a sectional view of the mist collector, and FIG. 4 is a mist collector and other parts. It is a top view showing an example of. 1-6... Mantle, 8... Suction cover, 10... Inlet, 13... Suction port, 21-26... Nozzle, 21a
~26a... spout, 31-36... mist collector,
40... Collection plate, 41... Disc, 42... Rising wall, 4
3...Mist flow hole, 50...Mist reservoir.

Claims (1)

[Claims] 1. A suction cover that connects a number of mantle tubes so that they can be moved in and out, has an inlet at one end of the mantle for introducing gas containing the mist to be classified and collected, and has a suction port at the other end. A nozzle is fixed in each cannula, and a mist collector is arranged opposite to the nozzle of the nozzle, and the inner diameter of the nozzle and the distance between the nozzle and the mist collector are set to the above one end. The size of the mist collector is gradually reduced from the cannula at the other end to the cannula at the other end. A mist classification and collection device comprising a plate and a mist reservoir attached behind the collection plate.