JPS60205170A - Continuous treater for drying, etc. - 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 relates to a continuous processing device for drying, etc. suitable for drying water-containing materials containing harmful substances such as radioactive waste.

Concentration, dehydration, drying, incineration, melting, solidification, etc. of hydrated materials are used to reduce the volume of hydrated materials containing harmful substances, such as concentrated waste liquids containing radioactive waste, sludge, and sludge, and to make them into stable solidified bodies. Science and technology research 1. iF1 launches have been actively conducted in recent years, and some have already been put into practical use.

By the way, when dehydrating and drying a water-containing material containing harmful substances as described above, it is desirable to prevent non-volatile harmful substances from scattering as dust and mixing into the exhaust gas as much as possible. However, in continuous processing equipment such as thin film dryers and rotary kilns that are commonly used for dehydrating and drying hydrated materials, the hydrated material is stirred within the equipment, so scattering of drying dust is unavoidable. It is not possible to prevent the mixture from entering the exhaust gas. Therefore, it was necessary to attach a separation and collection device for this dust to the exhaust gas treatment device. In addition, there are vacuum freeze dryers and external heating stirring tanks as batch-type processing equipment, but the former requires a large surface area and there is a risk that the dried material may be scattered during transfer or transfer. can be,
In the latter case, dust scattering due to stirring becomes a problem, as in the above-mentioned continuous processing system.

Therefore, as an alternative to the conventional general processing apparatus described above, a coaxial microwave drying apparatus as shown in FIG. 9 has been devised. This drying device consists of a cylindrical body 1 made of gold #i and a rotating shaft 3 equipped with screw blades 2 made of dielectric material, and the drying device guides microwaves into the cylindrical body 1 from a microwave inlet 4 to an inlet. The water-containing material introduced from 5 is subjected to induction heat treatment and discharged from an outlet 6 as a dry material.

However, in the above-mentioned processing apparatus, since the microwave is confined inside the cylinder 1, water-containing substances may be transferred!
Depending on the position in the zero path, it is difficult to optimally control the strength of the micro1 lnt force or the thermal temperature.
There was a problem of poor heating efficiency.

The present invention was made in view of the current situation in the Joki era, and is a drying method that enables efficient heat treatment of objects to be treated using microwaves, and also allows easy control of heating temperature. The purpose of the present invention is to provide a continuous processing device such as the following.

In order to achieve the above object, the present invention μ is provided with a rotary shaft rotated by a shaft drive device on the cylindrical body, the axis of which is aligned with the axis of the cylindrical body; In addition to providing a screw castle, a plurality of microwave heating means are attached to the cylindrical body, and the screw blade is provided with a microwave transmitting portion formed of a dielectric material, and the cylindrical body is provided with a microwave transmitting portion formed of a dielectric material, and the cylindrical body is provided with a plurality of microwave heating means.
It is composed of microwave reflection and 41 which are divided into microwave heating @ 41 corresponding to the microwave heating means of Enoki which corresponds to the microwave heating means of B. Efficient heating is achieved by microwaves guided from a plurality of micro-IJLI heating means to heating waves of tM in the cylindrical body.

Hereinafter, one embodiment of the present invention will be described based on Figure 1.

In FIG. 1, the reference numeral 10 is a cylindrical body made of hard cedar whose upper opening is closed by an upper lid 11 and a cone portion 12 is formed at the lower part. This cylindrical body 10 is formed of metal, and is provided with an input port 13 at its top *1t through which a material to be treated, such as a water-containing substance containing a harmful substance, is introduced into the cylindrical body 10, and A gas discharge port 15 is provided at the upper part of the side wall 14, and the lower part of the cone 412 serves as a discharge port 16 for the material to be treated, and a discharge valve 17 is attached to this discharge port 16. The input port 13 is connected to the other end of a screw feeder 19 which is provided with a hopper 18 for receiving the material to be processed, and the gas discharge port 15 is connected to a condenser 20 . Further, the input port 13, the discharge port 16, and the gas discharge port 15 are all formed in a size that is cut off against microwaves from a microwave heating means to be described later.

Further, a predetermined position (q
and one end of a metal microwave guide 'f21&+21b is connected to a predetermined position in the lower part by communicating the pipe line with a through hole formed in the side wall 14,
A temperature controller 22a is provided at the other end of each microwave waveguide g21a+21b.

22E is attached to the microwave oscillation device 23a.

23b are provided respectively. In addition, partition plates 24a and 24b formed of a dielectric material such as ceramic, glass, or Teflon are used to close the through holes in the four walls 14 to which the microwave guide tubes 21a and 21b are connected. are provided respectively.

And the above microwave oscillator +f23a, 23? l,
-r microwave 2FP wave tubes 21 lL+ 21 b etc. respectively guide microwaves into the cylindrical body 1.0 to form a heating pA region of the microphone CFF branch.Microwave heating means 2
5a.

25b.

On the other hand, in the middle Q;/c of the cylindrical body 10, a rotating shaft 26 made of gold is arranged with its axis aligned with the axis of the cylindrical body 10. The upper end of this rotating shaft 26 is
through the page and support the bottom edge or the top of the cone part 12 @@'27
It extends up to the bearing 28a.

28t, is rotatably supported by the upper lid 11 and the support member 27, and a drive motor such as a drive motor is mounted on the upper end of the upper lid 11 and the support member 27.
A device 29 is connected. Further, a screw g30 for transferring the object to be processed is provided along the length direction of the rotating shaft 26. This screw, 1
ii! 30 is a shaft portion 31a+31 made of sfL material such as ceramic whose upper and lower portions are layered on the rotating shaft 26.
b, the inner edge is fixed to the outer circumferential surface of this shaft portion 31 a r 31 b, the outer edge is located close to the inner circumferential surface of the ml wall 14 of the cylindrical body 10, and the outer #4 is located below the inner edge side. Wing portion 3 made of a dielectric material such as ceramic and tilted so that
2a.

32b, and its intermediate portion has an inner edge directly fixed to the upper m1 rotating shaft 26, and the wing portion 32a.

32 b same shape tfx, L,, the maple 832 a
, 32 bK Continuously formed wing portion 33 made of gold M4
The upper part and the lower part are microwave transmitting parts 34.
The intermediate portion serves as a microwave reflecting portion 35. The microwave reflecting section 35 is located between the connecting portions of the microwave waveguides 21a and 21b to the cylindrical body 10, that is, between the microwave introduction portions, and the microwave reflecting portion 35 allows the cylindrical The interior of the body 10 is divided into an upper microwave heating area and a lower microwave heating area.

Therefore, in the above-mentioned continuous processing apparatus, when drying a material to be processed such as a water-containing material containing fresh substances, first, the collecting device 129 is activated, the rotating shaft 26 is rotated, and the screw shaft is rotated. Rotate 30. Then, each microwave oscillation m + t23 a t 23 b 2! i: The microwaves are activated to oscillate, and the valley microwaves are transmitted from the microwave waveguides 21a+21b through the partitions w and 24a+24b made of dielectric material to the cylindrical body l.
Lead into O. Then, microwave heating regions are formed at the top and bottom inside the cylindrical body 10.
The JJ mouth heat temperature in the mouth heat '1i JIL range is optimally controlled by each temperature controller 22&+221+. In this state of deafness, the screw feeder 19 is operated to transfer the processed material stored in the hopper 18 to the input port 13.
The pulp is continuously fed into the cylindrical body 10, and the discharged pulp 17 is made into an open cap at a predetermined timing. Then, the object to be processed falls onto the helical surface of the upper surface of the screw @30,
Due to its inclination and gravity, it regenerates while contacting the inner circumferential surface of the cylinder 10 and is gradually transferred downward, but while passing through each of the microwave heating ffL regions formed inside the cylinder 10, , the microwaves are sequentially absorbed and the material is gradually and efficiently dried and heated. In other words, the material to be treated contains a large amount of water when it falls from the input port 13 onto the screw blade 30, but is transferred downward by the screw blade 30 and is first heated in the microwave heating area above. Drying/IO Heat by Absorbing Waves 11 Next, it is sent to the microwave heating area below where it absorbs the microwaves and is further dried and heated. Then, the dried material has a predetermined moisture content and is discharged from the discharge port 16. The water vapor generated by drying and heating the object to be treated is still led to the condenser 20 from the gas outlet 15 together with the cracked gas and cooled.
#Rice is separated.

Here, in most cases directly in the continuous processing apparatus, the material to be processed that has fallen onto the screw blade 30 is transferred downward without being stirred relatively, so that the dried material to be processed becomes dust. There aren't many things.

Further, the cylindrical body 10 includes two microwave heating means 25a.
1 25b is attached, and two microwave heating regions Aj are formed in the cylindrical body 10 corresponding to these two microwave heating means 251L+25b, and
These microwave heating areas do not.

The heating temperature in each case is controlled by a temperature controller 22.
Since it is controlled by a + 22 b, even if the physical properties of the object to be processed change during the dry heating IM stage, it is possible to easily dry and heat the object at the optimum heating temperature for the physical property.
Heating efficiency increases. Furthermore, since the screw blade 30 has a vertical shape, the free table UkJ'+* of four objects thereon is much larger than in the case of a horizontal screw blade.

Furthermore, in the continuous processing apparatus described above, by changing the rotational speed of the screw blades 30, the residence time of the object to be processed within the cylindrical body 10 can be adjusted freely. Furthermore, each wing portion 32a of the screw wing 30.

Since the outer edges of the screws 32b and 33 are inclined so that they are lower than the inner edges, the objects to be processed, which would otherwise fall at a large pitch with a non-inclined horizontal screw, can be dropped at a small pitch. This allows the device to be made smaller. It is also easy to maintain the airtightness of the device.

By the way, in the above embodiment, two microwave heating means 25a+25b are attached to the cylindrical body 1°.
Two microwave heating areas A and h were formed within 0, but
It is advantageous to attach more microwave heating means to the cylindrical body 1o, since the heating temperature can be controlled in smaller increments.

Furthermore, as shown in FIG.
In a microwave oven 37 having chambers 36 a r 36 b, a material such as ceramic, glass, Teflon, etc.
! A vertical cylindrical body 50 formed of a 111C body is arranged,
Each oven chamber 36 a of this microwave open 37
A microwave oscillator j123 a r 23 b may be attached to the +36b via the microwave guide 'f21 & +21b. In this case, each oven chamber 36a, 36b of the microwave open 37, the microwave oscillators 23a, 23b, etc. are connected to the microwave heating means 25a.
+25b and each microwave oscillation device 23 a r
The microwaves oscillated by the oven chambers 36a, 36bK4 are transmitted through the surrounding wall 51 from substantially the entire surface of the side wall 51 of the cylindrical body 50, and enter the inside of the cylindrical body 50.

Therefore, the object to be processed, which is transported on the upper surface of the screw blade 30, can receive microwaves from its entire circumference.

In the wJz diagram, the reference numeral 38 is an inert gas supply port, and each oven chamber 36 &.

The boundary portion 39 of 36b is made of thermal metal. Further, the screw blade 30 is integrated with a rotating shaft 52 made of a sleep-inducing material such as ceramic whose shaft portion is connected to the metallic rotating shaft 26 by flange connection within the cylindrical body 50, and furthermore, the screw blade 30 is integrated with a rotating shaft 52 made of a sleep-inducing material such as ceramic. Part 35 is Wsr! For example, it is formed by attaching a gold striped member 35& to the lower surface of the wing portion formed by the body. Note that the microwave reflecting section 35
The 0-rotation shaft 52 is preferably made of Kinpo, but may be made of #7st material as long as its axial length is large enough to cut off microwaves.

In addition, in the above, the screw blade 30 is a single one with a special pitch, but the physical properties of the processed material vary depending on the material that loses and sucks, and even in the process of drying and heating, the water content changes as the value decreases. Therefore, in order to accommodate this, the shape, pitch, etc. of the screw blades 30 may be changed appropriately.

FIG. 3 shows the pitch P on the lower side of the screw blade 30 and the pitch P on the upper side! This is a much smaller version.

This is because on the lower side of the screw blade 30, the water content is high and the flow is strong, but on the lower side of the screw blade 30, the water content decreases and the flow rate becomes faster, which may generate dust. This is to prevent this from happening. In addition, when the screw 830 is an inclined type as in this example, the radial direction inclination θ of the screw blade 30 is
The angle is preferably 5° to 40° with respect to the horizontal. For the same purpose, as shown in FIG.
The lower part 30b may be of an inclined type, and the lower part 30b may be of a horizontal type. In FIG. 5, a plurality of screw blades 30 are attached to a rotating shaft 26 with a spacer 40 interposed therebetween. In this case, depending on the physical properties of the material to be treated and changes in its properties during the drying and heating process, the pitch, length, etc. of The material is transferred downwards on each screw thread 30 without being stirred relatively, but at the discontinuous portion where the spacer 40 is interposed, the material falls and is agitated to the extent that no dust is lost, which improves drying efficiency. increases.

FIG. 6 shows a number of pieces 41 on the outer edge of the screw blade 30.
I'm sure it's set up. This valley piece 41 has a number of long holes 41a extending in the radial direction of the screw blade 30, and a plurality of bolts 42& screwed through the outer edge of the screw blade 30 are inserted into the long hole. 41&, and by screwing the napht 42b thereto, it is locked to the screw blade 30, and the screw blade 300 can be freely moved in the radial direction. Therefore, the piece 41 contacts the inner circumferential surface of the cylindrical body 10 (50) and rotates by its own force 1K. Therefore, the objects to be processed are the screw blade 30 and the cylindrical body 10. (50), and a short bath of the object to be treated at the cylindrical body 10° (50) is prevented. Also, this piece 41
By attaching the screw blade 30, the outer diameter of the entire screw blade 30 is automatically adjusted to the cylindrical body 10. (50), it is not necessary to precisely process the outer periphery of the screw blade 30, making its manufacture extremely easy.

In addition, the heath 41 is connected by the bolt 42& and nut 42a.
The gap between the inner peripheral surface of the cylindrical body 10 (50) and the screw blade 30 may be adjusted by fixing the screw blade 30 at an appropriate position.

Furthermore, as shown in FIG. 7, the cylindrical body 10 can be arranged horizontally to configure the apparatus.

In this figure, what is indicated by the reference numeral 43 is a duct provided over a plurality of gas discharge ports 15, and this duct 4
3 is provided with a gas exhaust pipe 44. In addition, in this embodiment, in order to short-circuit the cylindrical body 10 and the rotating shaft 26 in terms of microwaves, a choke member 45 formed of a dielectric material such as ceramic is provided at the center portion of the cylinder 1 and at the outer edge of the screw blade 30.
．． 46 are provided respectively.

Furthermore, by forming the above-mentioned cylinder with heat-resistant #4$I, it can be used as a combustion device for carbonization, incineration, catalyst regeneration, etc. Also, it can be used as a combustion device for carbonization, incineration, catalyst regeneration, etc. It can also be used as a moving bed catalytic reaction device by allowing a fluid to be reacted to flow through the body 10, (50). In this case, thermal theory suggests that it is necessary to select an appropriate dielectric material depending on the processing temperature.

As explained above, 14! drying etc. of the present invention! In the subsequent processing equipment, the material to be processed, such as a water-containing material containing harmful substances, is heated by microwaves while being moved by screw blades, so that the material to be processed is less likely to scatter as dust. Further, a plurality of microwave heating means are attached to the cylindrical body, and a plurality of microwave heating regions are formed in the length direction of the cylindrical body corresponding to the plurality of microwave heating means. 1. The physical properties of the processed material change during the transportation process. By controlling the heating temperature in each microwave heating area using food packs, it is possible to always thermally treat the workpiece with optimal efficiency.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view showing one embodiment of the present invention, Fig. 2 is a schematic sectional view showing another practical example, Figs. 3 to 6 show other configurations of the screw blade, and Fig. 3 Figure 4 is a schematic cross-sectional view when the lower pitch is smaller than the upper pitch, Figure 4 is a cross-sectional diagram when an inclined maple and a horizontal maple are combined, and Figure 5 is a combination of multiple screws via spacers. FIG. 6(a) is a schematic cross-sectional view of the four joints, FIG. 6(a) is a schematic cross-sectional view of a severe case in which a piece is provided on the outer edge of the screw blade, and FIG. 6(b) is a plan view of the same. Figures 7 and 8 show an embodiment in which the cylindrical body is arranged horizontally, and Figure 7 is a schematic cross-sectional view.
FIG. 8 is a schematic cross-sectional view taken along the line ■-■ in FIG. 7. moreover,
FIG. 9 is a schematic cross-sectional view of a conventional H position. 10...Cylindrical body, 23(L...Microwave oscillation device free, 23b...Microwave oscillation device, 25&...Microwave heating means, 25b・
...Microwave heating means, 26...Rotating shaft, 29...Cooperating device, 30...Screw blade, 34...Microwave Transparent part, 35・
...Microwave reflecting section, 37...Microwave oven, 50...Cylindrical body. Applicant: Niigata Iron Works Co., Ltd. Agent Δ Masuji, t5 reinstatement J prisoner 1. \;,・1 Figure 3 Figure 4 Figure 5 Figure 6 (a) (b)

Claims (1)

[Claims] A rotating shaft rotated by #A recommendation 1t is arranged in a cylindrical body equipped with an inlet and an outlet for the material to be processed, with its axis aligned with the axis of the cylindrical body, and A screw blade for transporting the object to be processed is provided along the length direction of the rotating shaft, and a plurality of microwave heating means for guiding multi-channel waves into the cylindrical body are installed in the cylindrical body. The screw blades are arranged side by side in the direction along the axis, and the screw blades include a microwave transmitting part formed of an inducer, and a plurality of microwave heating regions corresponding to the above-mentioned number of microwave heating means in the cylindrical body. This part, which is composed of a microwave reflecting section that is divided into sections, has a continuous feeling of drying, etc. Device.