JPH1123155A - Jet burner type processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jet burner type processor which can prevent the occurrence of remaining of incompletely processed matter staying at the bottom without being cracked with only the heating gas substance, and can immediately cope with even the fluctuation of the property of handling matter, and can roughly equalize the quantity of processed matter contained in the mixed gas sent out of an exhaust part, and can recover the processed matter stably in desired property. SOLUTION: This processor is equipped with a wing-form body 21 which rotates along a vessel wall, at the bottom of a processing vessel 1 equipped with a jet burner 2, and this returns the incompletely processed matter to the flow of exhaust gas body 12 by crushing the incompletely processed matter having fallen to the vessel wall 1a with the wing-form body 21 and flying it with centrifugal force. Thus, this can prevent the occurrence of the incompletely processed matter 18 apt to remain within the vessel and roughly equalize the quantity of processed matter contained in the discharged mixed gas, and it is possible to recover the processed matter 11 stably in desired property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet burner type processing apparatus for spraying and drying a high-speed, high-temperature hot gas body ejected from a jet burner provided in a processing tank, and drying and pulverizing the same. The present invention relates to a jet burner-type processing apparatus that processes an incompletely processed material without accumulating at a bottom portion and stably discharges an object to be processed from a processing tank with desired properties.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional processing apparatus using a jet burner (see Japanese Patent Application Laid-Open No. 53-7866).

According to this prior art, a jet burner 2 is installed above a treatment tank 1 having a closed structure for drying and pulverizing a handled material 8, and the handled material 8 supplied into the tank by a pump P is applied to the inside of the jet burner 2. By directly spraying a hot gas body 7 that does not cause an oxidation reaction that burns and is ejected at high speed and high temperature, the evaporated component 10 contained in the handled material 8 is instantaneously vaporized and separated from the solid object 11 to be processed. Then, the inside of the processing tank 8 is scattered and scattered on the flow of the exhaust gas body 12 indicated by the arrow. In this way, the handled material 8 is processed by the hot gas body 7 to
0 is vaporized and the solid component is dried to form an object to be treated 11, which travels in the treatment tank 1, and repeatedly crushes the collision with the side wall of the treatment tank 1 and the mutual collision of the object to be treated 11. Reference numeral 7 denotes an exhaust gas body 12 which is deprived of energy by the evaporation of the evaporation component 10 and the reversal of the flow direction due to the collision with the bottom of the processing tank 1, and a mixed gas body in which the evaporation component 10, the treatment object 11, and the exhaust gas body 12 are mixed 13 is an outlet 14 of the processing tank 1
From the tank.

The mixed gas 13 discharged from the processing tank 1
Passes through a duct 15 connected to the discharge port 14 while maintaining the temperature at which the evaporating component 10 is kept in a vapor state. 12 and collected and collected.
After the evaporation component 10 is condensed and collected by the condenser, the exhaust gas body 12 is released to the atmosphere.

[0005]

In the above prior art,
The handled material 8 supplied to the processing tank 1 is processed into a hot gas body 7 ejected from the jet burner 2 to become an evaporating component 10 and a solid object 11 to be processed, and the exhaust gas body 12 indicated by an arrow in FIG.
It is considered that the water is discharged from the discharge port 14 along the flow of the air.

[0006] Hot gas body 7 ejected from jet burner 2
Is a supersonic flow with a temperature of about 2,000 K at the center and a flow velocity of about 1200 m / sec in the high-speed region between 7 and 8 times the burner outlet diameter. The amount of entrained gas is very small.

The flow of the hot gas body 7 is reduced by viscous friction due to a speed difference from the surrounding gas body which is almost stationary compared to the supersonic flow, so that the gas body existing around the hot gas body also becomes involved. While being deprived of energy by viscous friction and entrainment, the energy further decelerates to below the sonic speed, and in the region below this sonic speed, the entrainment of the surrounding gas is further increased, leading to the expansion of the flow of the gas. The region where the supersonic speed changes to the sonic speed is called a transition region portion, and the region where the flow below the sound speed spreads is called a diffusion region portion.

FIG. 5 shows the flow of the hot gas 7 and the exhaust gas 12 inside the tank when the jet burner 2 is installed in the processing tank 1. As can be seen from FIG. 5, the rising speed of the flow along the side wall of the processing tank 1 is large, and the rising speed decreases along with the flow of the hot gas body 7 ejected away from the side wall, so that the heat gas 7 A swirling agitated flow is formed in a portion along the flow. In FIG. 5, reference numerals 3 and 4 denote compressed air and fuel supplied to the jet burner 2, and CW denotes cooling water for cooling the jet burner 2.

In order to use the flow of the hot gas body 7 to vaporize the evaporating component 10 from the material 8 to be processed from the solid material 11 to obtain the material 11 as a dry powder, It has been considered that it is better to supply the handled material 8 directly to the center of the hot gas flow in the high-speed region or the transition region. However, the center of the flow of the hot gas 7 is high-speed even in the diffusion region. Since the velocity difference between the flow of the hot gas body 7 and the article 8 corresponding to the stationary state is too large, most of the article 8 is repelled by the energy of the flow and the hot gas body 7
, And is not sufficiently treated just by being stirred by the surrounding stirring flow and reaches the bottom (tank bottom) of the processing tank 1 as an incompletely processed product having a large specific weight containing a large amount of the evaporating component 10.
It accumulates at the bottom of the tank as indicated by 18 in FIG. Only a part of the handled material 8 that has successfully flowed in the flow of the hot gas body 7 becomes the evaporating component 10 and the object to be processed 11 and flows in the flow of the exhaust gas body 12 exceeding the terminal velocity along the tank wall, and the outlet 14 Is discharged from

The material 8 supplied to the apparatus is not always the same, and may vary depending on the season or the day, and furthermore, the properties of the material 8 supplied during operation of the apparatus, For example, the water content may change, and if the incompletely processed material 18 of the processed material 8 before the property change remains at the bottom of the tank, the processed material 8 before the property change is mixed with the to-be-processed material 11 to be collected. Each time the properties change, a great deal of effort is required to remove the incompletely processed materials 18 accumulated in the processing tank 1, and it is not possible to cope with fluctuations in the properties of the handled materials 8.

Therefore, an object of the present invention is to cope with a case where a supplied material having a fluctuating property is supplied without the collected material remaining at the bottom of the processing tank in an incomplete treatment state.
An object of the present invention is to provide a jet burner type processing apparatus capable of stably recovering an object to be processed having desired properties.

[0012]

A feature of the present invention that achieves the above object is that a vaporized component is vaporized by blowing a hot gas ejected from a jet burner onto a handled material supplied into a processing tank. The mixture is separated from the solid material to be treated, and the mixed gas containing the exhaust gas, evaporative components, and the material to be processed, which has changed from the hot gas, is discharged from the processing tank and separated into the exhaust gas, vaporized components, and the material by the separation means. In a jet burner type processing apparatus, a crushing means for mechanically crushing the incompletely processed material which is not separated into the evaporation component and the object to be processed is provided at the bottom of the processing tank. There is provided a return means for returning from the bottom to the inside of the processing tank.

Another feature of the present invention is that in the jet burner type processing apparatus, a wing-shaped body which rotates and moves along the bottom of the processing tank and serves as the crushing means and the return means is provided.

Another feature of the present invention is that in the jet burner type processing apparatus, the crushing means is a cutter provided in a pocket portion provided at the bottom of the processing tank, and the returning means is provided by the cutter. It is a conveyor for returning the crushed incompletely processed product from the pocket portion to the inside of the processing tank.

Another feature of the present invention is that, in the jet burner type processing apparatus, the flow of the hot gas ejected from the jet burner is directed above the crushing means in the bottom along the tank wall of the processing tank. Is provided with a rectifying cap for inverting rectification.

According to the present invention, the incompletely processed material accumulated at the bottom of the processing tank is mechanically crushed by the crushing means, and the crushed incompletely processed material is returned from the bottom of the processing tank by the returning means. In order to return to the inside, it is possible to cope with a case where a supplied material having a fluctuating property is supplied without the supplied material remaining at the bottom of the processing tank in an incomplete processing state, and the object to be processed having a desired property can be processed. It is possible to provide a jet burner type processing apparatus that can be stably recovered.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a jet burner type processing apparatus according to the present invention will be described below with reference to FIGS.
The jet burner-type processing apparatus of the present invention includes, as main components, a processing tank 1 which exposes a material to be processed by exposing a material to be processed to a hot gas body from a jet burner, and a separating means 16 for separating and recovering the material to be processed. I have.

A jet burner 2 attached to the processing tank 1 injects compressed air 3 and fuel (such as kerosene) 4 into a combustion chamber 5 having a cooling water passage between the inner wall and the outer wall for combustion. From the jet port 6, the burned hot gas body 7 which does not cause an oxidation reaction is jetted as a flame jet stream.

The material 8 to be handled is a material supply means 9.
Is supplied from the side of the processing tank 1 to a position directly exposed to the internal hot gas 7. Handling material supply means 9 of the present embodiment
Uses a screw conveyor in which the supply amount of the handled material 8 can be easily adjusted by the rotation speed of the screw. In the case of a screw conveyor, the handled material 8 must pass through the spiral shape while the passage length is long.
In addition to the fact that the pressure inside the processing tank 1 is higher than the outside, the outside air does not enter the inside of the processing tank 1 through the screw conveyor, and the inside of the processing tank 1 does not cause an oxidation reaction. Is maintained.

The material 8 supplied into the processing tank 1 is exposed to the high-temperature hot gas body 7 at a high temperature to evaporate the evaporation component 10 such as moisture or oil, and to dry and pulverize the solid component. It becomes thing 11. This is hereinafter referred to as crushing of the handled material 8. On the other hand, the hot gas body 7 consumes energy to evaporate the evaporating component 10, pulverize the object to be treated 11, hit the bottom of the processing tank 1, reverse the flow direction and agitate the flow in the tank, and consume exhaust gas. It becomes 12. A mixed gas body 13 in which the evaporated component 10, the treatment object 11, and the exhaust gas body 12 are mixed.
Enters the separation means 16 through the duct 15 connected from the discharge part 14 at the upper part of the processing tank 1, and the object 11 is separated and collected. In the present embodiment, a cyclone is used as the separating means 16. After the recovery of the treatment object 11, the evaporating component 10 and the exhaust gas body 12 are subjected to heat exchange in the condenser 17 to collect water or oil as the evaporating component 10,
The exhaust gas body 12 is released to the atmosphere.

However, even if the material 8 is actually supplied to the flow of the hot gas body 7, the material 8 has a specific weight and inertia, so that the flow of the hot gas body 7 having an extremely large speed difference is not sufficient. Incomplete treatment in which the water cannot be followed and is repelled and stirred only by the surrounding stirring flow, and the amount of the evaporated component 10 on the surface in contact with the hot gas body 7 is not small, but the solid component inside is still contained the evaporated component 10. In many cases, the material 18 reaches the bottom 1 a of the processing tank 1. The incompletely processed product 18 has a high specific weight and stays at the bottom 1a.

At the bottom 1a of the processing tank 1 according to the present invention, crushing means for mechanically crushing the incompletely processed material and return means for returning the crushed incompletely processed material from the bottom 1a to the inside of the processing tank 1 are provided. The wing-shaped body 21 is also provided. The wing-shaped body 21
The motor 19 rotates fixedly on a rotating shaft 20 that rotates. The lower edge of this wing-shaped body 21 is the bottom 1 a of the processing tank 1.
Is rotatable along the tank wall of the
Are supported by bearings 20a and 20b, and the rotation speed of the motor 19 is controlled by a control device (not shown) according to the properties of the object 8 to be handled. The same reference numerals as those shown in FIG. 1 and those shown in FIG. 4 and FIG.
Description is omitted.

When the imperfectly processed material 18 that has reached the bottom 1a hits the rotating airfoil 21, it is crushed by a mechanical shock and along the tank wall due to the centrifugal force of the rotating airfoil 21. It is flipped in the direction of arrow 22. When the imperfectly treated material 18 is crushed by the airfoil 21, the surface area increases, the contact surface with the exhaust gas body 12 increases, and the evaporation component 10
Is easily vaporized and easily separated from the solid material 11 to be processed. A rectifying cap 23 fixed to the rotating shaft 20 is provided on the upper part of the wing-shaped body 21 to easily reverse the flow of the hot gas body 7 and to prevent the imperfectly processed material 18 from directly hitting the wing-shaped body 21. I have.

The hot gas body 7 is a dry gas which is burned in the combustion chamber 5 of the jet burner 2 and which does not cause a high-temperature and high-speed oxidation reaction. It becomes 12. The temperature inside the processing tank 1 is 200 to 500 ° C. due to the ascending flow and the stirring flow,
The incompletely processed product 18 is crushed by the wing-shaped body 21 to increase the surface area and is easily crushed, and is discharged from the discharge portion 14 while maintaining a state of being mixed with the exhaust gas body 12 without burning. In this way, the incompletely processed material 18 that has reached the bottom 1a without being crushed by the hot gas body 7 alone is also mechanically crushed and crushed without staying at the bottom 1a of the processing tank 1, so that the discharge section Since the amount of the object to be processed 11 contained in the mixed gas body 13 discharged from 14 can be maintained in a substantially uniform state, and there is no operation for removing or remaining the incompletely processed object 18 in the processing tank 1, Even if a handled material 8 having a changed property is supplied, it can be dealt with immediately.

The processing tank 1 of this embodiment has a bottom 1a.
Is attached by the flange 24a and the flange 24b,
The assembly, maintenance and inspection of the wing-shaped body 21 are facilitated.

Next, a second embodiment will be described with reference to FIG. In FIG. 3, the handled material supply means 9 shown in FIG.
Is not shown. The same or corresponding components as those shown in FIG. 3 and those shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, the bottom 1b of the processing tank 1
A rotary cutter 25 as a crushing means for mechanically crushing the incompletely processed material which is not separated into the evaporation component and the material to be processed, and returning the crushed incompletely processed material from the bottom 1b to the inside through the outside of the processing tank. A horizontal conveyor 26 and a lifting conveyor 27 as means are provided.

That is, the bottom 1b of the processing tank 1 is attached to the main body side flange 24a of the processing tank 1 by a flange 24c, and a pocket 1 having a rectangular cross section is formed at the center bottom.
c, and a rotary cutter 25 driven by a motor (not shown) is provided therein. The rotary cutter 25 is formed by sharpening the tips of two meshing gears.

Further, after the incompletely processed material 18 having fallen is crushed by the rotary cutter 25 on the bottom 1b of the processing tank 1, the processing tank 1 passes through the outside of the processing tank 1 from the bottom of the pocket 1c.
A horizontal feed conveyor 26 and an ascending conveyor 27 for returning to the flow of the exhaust gas body 12, which is an ascending flow, are provided. The upper exit of the ascending conveyor 27 is provided at a position where the incompletely processed product 18 crushed into the flow of the exhaust gas body 12 which is reversed at the bottom of the processing tank 1 and becomes an ascending flow is easy to ride.

A rectifying cap 23 supported by a plate-like support 28 is provided above the pocket 1c to facilitate the reversal of the flow of the hot gas 7 and the imperfectly processed material 18 falls directly into the pocket 1c. The lower side of the rectifying cap 23 is pocket 1c so that it does not hit the rotary cutter 25
Is larger than the opening. That is, the rectifying cap 23
Is located above an opening from the bottom 1b of the processing tank 1 to the pocket 1c, and covers the opening when viewed from above. The flow of the hot gas body 7 ejected from the jet burner 2 is The flow is rectified in the direction along the tank wall of the tank 1. Further, since the mounting is performed by the flange 24c, assembly, maintenance and inspection are easy.

The present embodiment is suitable for the case where the handled material 8 includes a relatively hard solid material. That is, with the above-described structure, the hard incompletely processed product 18 that has reached the bottom 1b without being decomposed only by the flow of the hot gas body 7 stays in the bottom 1b of the processing tank 1 by mechanically crushing. Mixed gas body 13 which is processed without being discharged from the discharge unit 14
Can be maintained in a substantially uniform state, and the incompletely processed product 18 does not remain in the processing tank 1, so that it is possible to directly cope with the fluctuation of the handled material 8.

The rotary cutter 25 may be of a type other than the rotary type.

[0033]

According to the present invention, since the crushing means and the returning means are provided at the bottom of the processing tank, the incompletely processed material reaching the bottom without being crushed only by the flow of the hot gas in the processing tank. Does not stay at the bottom of the processing tank, can directly cope with fluctuations in the properties of the material to be handled, and can obtain a jet burner type processing apparatus capable of stably collecting the object to be processed with desired properties.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing an overall configuration of a jet burner type processing apparatus to which the present invention is applied.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 4 is a view showing a conventional jet burner type processing apparatus.

FIG. 5 is an explanatory diagram of a gas flow in a tank when a jet burner is provided in a processing tank.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Processing tank 1a, 1b ... Tank bottom part 2 ... Jet burner 3 ... Compressed air 4 ... Fuel 7 ... Hot gas body 8 ... Handling material 10 ... Evaporation component 11 ... Workpiece 12 ... Exhaust gas body 13 ... Mixed gas body 14 ... Discharge part 18 ... Imperfectly processed material 21 ... Wing-shaped body 23 ... Cap 25 ... Rotary cutter 26 ... Horizontal feed conveyor 27 ... Ascending conveyor

Claims (4)

[Claims] 1. A hot gas body ejected from a jet burner provided in a processing tank is sprayed on a material supplied to the processing tank to vaporize an evaporating component and separate from a solid object to be processed.
A mixed gas body in which the exhaust gas body changed from the hot gas body, the evaporation component, and the object to be processed are mixed is discharged from a discharge unit, and the mixed gas body is converted into the exhaust gas body, the evaporation component, and the object to be processed. In a jet burner type processing apparatus provided with separation means for separating, at the bottom of the processing tank, crushing means for mechanically crushing the incompletely processed material that is not separated into the evaporation component and the object to be processed; A jet burner-type processing apparatus provided with a return means for returning the incompletely processed product from the bottom to the inside of the processing tank. 2. The jet burner type processing apparatus according to claim 1, further comprising a wing-shaped body rotating and moving along the bottom of said processing tank and serving also as said crushing means and said return means. Jet burner type processing equipment. 3. A jet burner type processing apparatus according to claim 1, wherein said crushing means is a cutter provided in a pocket provided at the bottom of said processing tank, and said return means is crushed by said cutter. A jet burner-type processing apparatus, which is a conveyor that returns the incompletely processed product from the pocket portion to the inside of the processing tank. 4. A jet burner type processing apparatus according to claim 1, wherein a flow of the hot gas ejected from said jet burner is directed above said crushing means in said bottom in a direction along a tank wall of said processing tank. A jet burner-type processing apparatus comprising a rectifying cap for performing reverse rectification.