JPS6021499A - Device for melting and treating granular body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses microwaves to melt and solidify powder.
Powder melting process]! l! More specifically, the present invention relates to a powder melting apparatus that can safely melt powder such as contaminating ash.

In the method of melting powder using microwaves, heating is performed by dielectric loss caused by the molecular motion of the substance itself that makes up the powder, so the processed powder can be uniformly melted from the inside. Since it is possible to efficiently heat melt + M, it is theoretically much more popular than conventional electric heating or width heating methods.For this reason, various [
Recently, it has been applied to the treatment of industrial waste and historical materials, and the waste generated from various industrial facilities and A5 nuclear facilities is heated and melted using a microphone [1]. ,
A method of turning silicon dioxide contained in waste into a lath and solidifying it is attracting attention.

Various types of melting processing equipment have been considered for this purpose. BACKGROUND OF THE INVENTION Solid body melt processing apparatuses are known.

The schematic structure of the powder melting section of this type of powder melting processing apparatus can be shown in FIG. That is, the powder melting section 1 includes a cylindrical container 5 consisting of metal cylinders 3 and 4h) with high conductivity that are joined or separated at the flange meeting section 2.
A microwave waveguide 7 that guides the microwave emitted from the oscillator 6 into the cylindrical container 5, a matching mechanism 33 that performs matching during resonance, and a powder introduction pipe 10 that introduces the powder 9 are installed on the top of the oscillator 6. When microwaves are introduced, a microwave cavity resonator is formed which resonates in a mode in which the inside of the cylindrical container 5 generates the strongest electric field.

In this powder melting processing apparatus, after introducing a predetermined amount of powder 9 into the cylindrical container 5, the powder 9 is irradiated with microwaves at tttl 1173, and the powder 9 is heated. Molten R
11 shi, then / 1 sentence in the cold state d3 < and the ingredients contained in the powder 9, such as silicon dioxide (if the powder 9 is ff6 Tomono from a nuclear facility), J-de 1 powder 9 becomes crow or rocks and solidifies. This solidified powder S)
will be separated from the metal cylinder 3 together with the cylinder 4 and disposed of.

This apparatus is considered to be the most excellent as a practical waste treatment apparatus in that it is capable of processing a large number of powdered materials at once. However, 1 fan power plant, 11 nuclear
31 Processing 'Jl field, using one radial delta isotope/
71! Radioactive powder such as radioactive incineration ash is incinerated in a facility, etc., and radioactive powder such as radioactive incineration ash is melted in a melting processing device where −, l= is used. If you try to deal with it, the following big problems will arise.

First, a (, 1, Ota) shaped body 9 is introduced into a cylindrical container 5 using a conventional powder melting processing apparatus i9t. : After that, the cylindrical container 5 is put into a pressurized state by the secondary gas emitted during microwave irradiation. 2) The microphone may fly out from the connection between the I-wave power cabin 7 and the powder introduction pipe 10. 1) (It may spill or blow out, contaminating the surrounding area. Such powder 9 may be exposed to the outside. If the W)-shaped body 9 is a waste from a nuclear power/II stage, it is extremely dangerous and poses a major safety problem.

Also, /J5L! In the case of JJ powder (incineration ash), the particle size is small and it easily floats or flies away. Therefore,
It is quite difficult to transport such dangerous powdered materials from incineration to melting without scattering the ash into the surrounding area.

The present invention has been made in view of these points, and has the following advantages:
Month-1 target is J3 powder flying out of the melting processing equipment during heat irradiation to the powder microphone! Our goal is to provide a powder melting processing device that eliminates blow-outs and improves safety.

To achieve this object, the present invention provides a powder melting processing apparatus equipped with a powder melting section consisting of a cylindrical container constituting a microwave cavity resonator. A cylindrical-conical container whose 11i13+-shaped bottom communicates with the powder melting section is provided, and a powder introduction pipe is tangentially connected to the peripheral wall of the cylindrical body of the 1-yen 811-shaped container, A powder collecting section is formed by installing an exhaust pipe at the top of the cylindrical body of the cylindrical-conical container, one end of which is connected to an exhaust device, and The collection section is brought into a negative pressure state, and the powder is introduced from the powder storage section into the +iQ powder collection section as a swirling airflow, and is allowed to settle and settle on the peripheral wall of the container of the powder collection section. Said wa) shape 1 wood melt 81 (part dropped 1;
J, the sea urchin is composed of R sign (there is).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Figures 2 and 3 (Δ-Δ10j plane view in Figure 2) are explanatory diagrams of an embodiment of the present invention.Same as Figure 1, 1 has a powder melting part C, and a cylinder 3 ．． /l at the flange joint part 2; (possibly combined!, two cylindrical containers 5), a microwave waveguide 7 introducing the microwave from the 5C shaker 6, and a mapping 1914ie 9. It is composed of ζ.

Reference numeral 11 denotes a powder collecting section, which collects powder dissolved rA1 through the ↑'τ path 17'I! Circle 1 connected to part 1; 1-yen hook-shaped container 1
5, and one end is tangentially connected to the peripheral wall of the cylindrical 1111 part 12 of the cylindrical-conical container 15, and the other end is opened to the powder storage section 18 (1<-). , 1cJ of the cylindrical body 12 of the container 15 in the shape of a circle f1M circle ♀1 on the end side
'AQ if!' through C1. 1, and an exhaust box 23 whose other end is connected to an exhaust device 22 such as a turbo fan or blade fan. Powder collection part 1
The exhaust side of No. 1, that is, the exhaust port of the exhaust system @ 22, is connected to the pipe 20.
It is connected to the collector 24 via the collector 24, and the collector 24 completely collects a small amount of powder accompanying the exhaust gas, and the pipe 25
The powder is returned to the powder storage section 18 via the.

Next, the operation of the powder melting processing apparatus having the above configuration will be explained.

In this processing apparatus, the exhaust device 2 of the powder collecting section 11
2 is started, the inside of the system consisting of the exhaust pipe 23, the cylindrical-conical container 15, the powder introduction pipe 19, etc. becomes in a negative pressure state,
Powder 9 in powder storage section 18 via powder introduction pipe 19
is sucked into a cylindrical-conical container 1°. Since one end of the powder introduction pipe 19 is tangentially connected to the circumferential wall of the circular body 12, the powder 9 sucked and introduced into the cylindrical body 12 becomes cylindrical due to the swirling airflow. It flows through the body part 12, receives the action of centrifugal force, descends (settles) along the circumferential wall of the cylindrical body part 12, and flows through the funnel-shaped bottom part 13 and the pipe line 14 to the cylindrical container of the powder melting part 1. Fall to 5.

With a predetermined amount of powder 9 deposited in the cylindrical container 5 of the powder melting section 1, the microphone 11 waves are introduced from the microwave waveguide 7 while the exhaust system sound 22 is still operating, and the matching machine tub 8 is heated. At the same time, due to the resonance V, a strong electric field is generated inside the cylindrical container 5. This electric field causes the powder 9 inside the cylindrical container 5 to
is heated and melted.

At this point, dusting occurs due to disturbances such as generation of by-product gas, and even if some of the powder 9 returns to the powder collecting section 11, it will be captured by the swirling airflow and will be affected by the centrifugal force. As a result, it sinks again along the peripheral wall of the cylindrical-conical container 15 and falls into the cylindrical container 5. When the powder 9 in the cylindrical container 5 is irradiated with microwaves for a predetermined time and then left to cool, the powder 9 (molten material) in the cylindrical container 5 becomes glass-like or rock-like. It solidifies. The solidified powder 9 is
The cylinder 3 is evacuated or stored together with the cylinder 4.

Although the airflow exhausted through the exhaust pipe 23 of the powder collecting section 11 does not contain the powder 9 for the most part,
Even if it is contained, it is collected by the powder 24, returned to the powder storage section 18, and subjected to the above-mentioned processing IfJi! again.

FIG. 4 is an explanatory diagram of another embodiment of the present invention, in which the same parts as in FIG. 2 are denoted by the same reference numerals, and the explanation thereof will be omitted. The feature of this embodiment is that a valve 26 is provided in the pipe line 14 that communicates the powder collecting section 11 and the powder melting section 1.Valve 2
6 is opened while the powder 9 in the cylindrical container 5 is being irradiated with microwaves. Therefore, even if dusting occurs on the powder 9 due to by-product gas during microwave irradiation, the powder does not return to the powder collection section 11.

Figures 5 and 6 (13-B sectional view in Figure 5) are d1 diagrams of other embodiments in the history of Mok Feng Ming, and the same reference numerals are used for the lf:il part as in Figure 2, The explanation of A is omitted.

The feature of this embodiment is that the cylindrical-conical container 15 constituting the powder collecting section 11 and the circular container 5 forming the powder melting section 1 are integrated, and a pipe is connected to each container. Road (2nd
This is because the pipe line 14) in the figure is omitted. According to such a configuration, since the powder melting section 1 and the powder collecting section 11 are integrated, it is possible to realize an efficient powder melting processing apparatus.

In each of the above embodiments, the υl air chamber 22 (these are omitted in FIGS. 4 and 5),
Although a turbo fan, a blade fan, etc. are used, the present invention is not limited to these. Fans (ventilators) such as multi-blade fans and propeller fans, and blowers such as turbo fans [1-WER and Roots-Blow 1-WER] are used. (Blower), 1 tank of water, 1 tank of water, 3. In addition, the present invention requires that the dust collector 24 be provided at the discharge end of the exhaust pipe 23, but not in the exhaust pipe 23.
The exhaust light may be in the furnace where the waste is burned or burned. Furthermore, although the present invention does not limit the cylindrical-conical container 1b 44'ii constituting the powder collecting section 11, it is generally made of metal. or,
In order to discharge the powder 9 after the melting process, a fJl outlet valve may be provided at the bottom of the cylindrical container 5.

As explained above in detail, the powder melting processing apparatus of the present invention (with a cylindrical body and a funnel-shaped bottom, the funnel-shaped bottom communicates with the powder melting section) The powder is drawn into the cylindrical body part as a swirling airflow by setting the trapping part under negative pressure, and is collected by sedimentation along the peripheral wall of the cylindrical body part, and is caused to fall into the powder melting part. Therefore, it is not only possible to transfer the powder from the storage part without scattering it to the outside, but also by-product gas is generated during the microwave irradiation of the powder, and the powder is removed by dusting. Even if some of the powder returns to the powder collecting section, it is captured by the swirling airflow and returns to the powder melting section, and is not scattered outside.

Therefore, it is considered to be extremely safe without contaminating the surrounding area.

[Brief explanation of drawings]

Fig. 1 is a conceptual explanatory diagram of a known powder melting processing device;
The figures show an embodiment of the present invention.
A sectional view, FIG. 4 is a diagram showing an embodiment of the present invention, and FIG.
The figure shows an embodiment of the song in the history of the present invention, and FIG. 6 is a view of B-r,'=VIi plane C' of FIG. 1... Powder melting part 2... Flange part 3.4...
・Circle v: I 5... Cylindrical container 6... Shooting device 7...
・Microphone 1-1 Wave 9 Wave Rental 8...Matching machine 4 Toma
9...￥5) (Book 11...Powder 111) Eastern part
12...Cylindrical body 13...Funnel-shaped bottom 14...
・Pipe line 15...Cylindrical It type container 18...Powder storage section 19...Powder introduction pipe 22
... Exhaust device 23 ... Exhaust pipe 24 ... State @Kitoku 9' [Applicant 31 [Toatsu Chemical Co., Ltd. agent Patent attorney 1] [Osamu Shimafuji

Claims (1)

[Scope of Claim] A powder melting processing apparatus equipped with a powder melting section consisting of a cylindrical container constituting a microwave cavity resonator, the funnel-shaped body comprising a cylindrical body and a funnel-shaped bottom. A cylindrical-conical container whose bottom communicates with the powder melting section is connected to the circumferential wall of the cylindrical body of the cylindrical-conical container in a tangential direction, and E.1 [Providing an exhaust pipe with one end connected to the exhaust neck at the top of the cylindrical body of the container (JJ, forming a powder collection section and The collecting part is brought into a state of 1 pressure, and the powder is introduced from the dressing part into the powder collecting part as a circulating air stream, and it settles along the peripheral wall of the container of the powder collecting part. Powder body temperature A characterized by being configured such that the powder body is allowed to fall into the powder melting section.
lt processing! ! Device.