JPH07168Y2 - Solid / gas separation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a solid / gas separation device used under low temperature conditions, and more specifically, a filter is provided in a passage for a low temperature gas containing frozen particles. The present invention relates to a solid / gas separation device which is arranged so that only frozen particles are collected by a filter.

[Prior Art] This type of solid / gas separation apparatus 1 is used as a frozen grain recovery means in a frozen grain manufacturing system as shown in FIG. 4, and is made of cloth, felt, non-woven fabric, wire mesh, etc. A filter 2 and a frozen grain recovery container 3 are provided.

That is, in this frozen particle manufacturing system, as shown in FIG. 4, the sprayed particles of the raw material 5 to be frozen are frozen in the manufacturing container 4 by heat exchange with the low temperature gas 6 such as liquefied nitrogen gas. The frozen particles 5a are discharged to the solid / gas separation device 1 by the injection gun 7 together with the low temperature gas 6. In the solid / gas separation device 1, the low-temperature gas 6 (including the drive gas 6a such as nitrogen gas for the injection gun) passes through the filter 2 and is exhausted, but the frozen particles 5a are collected by the filter 2. , Are collected in the collection container 3.

By the way, in such a case, the frozen particles 5a are likely to adhere and accumulate on the collecting surface, which is the inner surface of the filter 2, and there is a risk that the gas passage resistance increases with the passage of time.

Therefore, it is preferable that the separating device 1 be provided with means for eliminating the clogging of the filter 2.

As the clogging elimination means, for example, a means by mechanical vibration that gives a shock to the filter to vibrate it, or a means that uses air energy to blow off or peel off the deposits on the filter by a jet of air is adopted.

Such means is generally adopted in a solid / gas separation device that handles powder, but if the supply of low-temperature gas containing frozen particles to the separation device 1 is not temporarily stopped, the clogging elimination work is performed. However, there is a problem in the production and recovery efficiency of frozen particles.

In addition, since the impact is repeatedly applied to the same part of the filter by means of mechanical vibration, it is carried out under low temperature conditions (generally under the temperature of -60 ° C to -100 ° C). Is easily damaged. In addition, it is difficult to surely remove the frozen material attached to the filter by means of using air energy.

[Problems to be solved by the device]

An object of the present invention is to provide a solid / gas separation device which can efficiently and reliably avoid clogging of a filter due to frozen particles without causing such a problem.

[Means for Solving the Problems]

The solid / gas separation device of the present invention that solves this problem is
On the non-collecting surface side of the filter, a plurality of scrubbing bodies that can give a local concave distortion to the filter are provided, and a moving device structure that reciprocates each scrubbing body along the non-collecting surface of the filter is provided. It is provided.

[Action]

A local concave strain is blown off the filter, and as the body moves, it is sequentially formed in the moving direction. The filter is
Since the frozen material attached to and deposited on the collection surface stretches to the non-collection surface side, the filter is extremely distorted to the collection surface side at the portion where the scraping body passes, and adheres to the collection surface of the filter. , The deposit is peeled and removed.

〔Example〕

Hereinafter, the structure of the present invention will be described more specifically based on the embodiment shown in FIGS. This embodiment relates to an example in which the present invention is applied to a solid / gas separation device used as a means for collecting frozen particles in the frozen particle manufacturing system shown in FIG.

The solid / gas separation device 1 of this embodiment has a cylindrical filter 2 whose upper end constricted portion is connected to an injection gun 7, a recovery container 3 whose upper end portion is internally fitted and connected to a lower end portion of the filter 2, and a filter 2. 3 upper and lower annular support rods 11 ...
A plurality of roller-shaped scraping bodies 12, which are rotatably supported at equal intervals, and a moving mechanism 13 which vertically reciprocates the scraping body groups 12 are provided.

The support rods 11 ... Are integrally connected by a feeling of connection 11a.

Each of the scrapers 12 is attached to the outer surface of the filter 2 which is a non-collection surface 2a.
It is attached to the filter 2 in a state that it slightly digs in, and as shown in FIG. 3, it imparts a local concave strain to the filter 2. First
Stage 12 and body 3 ... and second stage body 12
.. are discrepant in the circumferential direction of the filter 2, as shown in FIG. 1 and FIG. Although the wiping-off body 12 has a shape that locally distorts the filter 2,
In the case of a roller shape, it is preferable that the diameter is about 25 mm. Further, the number thereof is also arbitrarily set according to the diameter of the filter 2 and the like, but it is sufficient to set about 3 to 4 for each stage. Although the scrubbing body 12 is rotatable on the support rod 11, it is preferably supported so as not to move in the axial direction.

As shown in FIGS. 1 and 2, the moving mechanism 13 includes a stepping motor 14, an operating shaft 15 that is linked to the motor 14 and is driven up and down, a second stage support rod 11 and an operating shaft 15. And a connecting body (16) for connecting with. Therefore, this moving mechanism 13
According to the method, each of the wipers 12 is reciprocated along the outer surface 2a of the filter 2. Of course, the moving mechanism 13 may be manually operated.

In the solid / gas separation device 1 configured as described above,
Each blow-off body 12 gives the filter 2 a local concave distortion,
Since the distorted portion is moved, even if the frozen particles 5a adhere to and accumulate on the collecting surface 2b, which is the inner surface of the filter 2, the adhered and accumulated matter is blown off from the filter 2 to the collection container 3 (see FIG. 3). ). Since such an action is continuously performed, the frozen particles are effectively recovered, and continuous operation becomes possible.

Further, only a local strain is applied to the filter 2, and since the strained portion moves, the filter is not damaged even under low temperature conditions. In particular, if the scraping body 12 is formed into a rotatable roller shape, the contact resistance to the filter 2 can be reduced as much as possible.
This is effective in preventing damage to the filter 2.

[Effect of device]

According to the present invention, it is possible to effectively avoid clogging of a filter under low temperature conditions without stopping the operation of the system and damaging the filter.

[Brief description of drawings]

FIG. 1 is a side view of a partially cutaway showing an embodiment of a solid / gas separation device according to the present invention, FIG. 2 is a cross-sectional plan view taken along the line II-II of FIG. 1, and FIG. FIG. 4 is a cross-sectional view showing the action (the cross-section is along the line III-III in FIG. 2), and FIG. 4 is a schematic cross-sectional view showing an example of a system equipped with a solid / gas separation device. 1 ... Solid / gas separation device, 2 ... Filter, 2a ... Non-collecting surface, 2b
... collection surface, 5a ... frozen particles, 6 ... low temperature gas, 12 ... scrubbing body, 13 ... moving mechanism.

Claims (1)

[Scope of utility model registration request] 1. A solid / gas separation device in which a filter is arranged in a passage of a low-temperature gas containing frozen particles so that only the frozen particles are collected by the filter, on the non-collecting surface side of the filter. In addition to providing a plurality of blow-off bodies capable of imparting a local concave strain to the filter, a moving mechanism for reciprocating each blow-off body along the non-collecting surface of the filter is provided. Air separation device.