JP2001033164A - Jet burner drying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a crushed and dried raw material to be discharged smoothly. SOLUTION: The apparatus comprises a treatment tank 20 including a hemispherical bottom 20a and a conical side wall 20b decreasing a diameter of the wall toward an outlet 21 of an upper end and is provided with an electric heater 22 outside. A jet burner 2 is provided toward a central part of the bottom 20a from an upper side. A raw material feeding pipe 23 provided with a conical cap 24 and a raw material feeding opening 25 directed outward radially is provided on the bottom 20a and faced to the jet burner 2. The outlet 21 is connected with a separator via a discharging duct 10. When a jet stream is generated by the jet burner 2, combustion gases 12 travel toward the outlet 21 along the cap 24, a screw conveyor of the raw material feeding pipe 23, and an inside of a treatment tank 20. As a result, sludge 8 is crushed and dried by the jet stream and sent to the separator through the outlet 21. The sludge 8 sticking to a wall surface of the treatment tank 20 is dried by the heated wall surface of the treatment tank 20 to separate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drying a raw material as an object to be treated, such as sewage sludge or oil mud containing water or oil. The present invention relates to a jet burner type drying apparatus for drying by a high-speed jet jet, and in particular, can prevent a raw material from staying in a processing tank for a long time.
The present invention relates to a jet burner type drying device.

[0002]

2. Description of the Related Art As one method for drying a muddy raw material containing water, oil, etc., a jet burner is used to generate a raw material supplied into a processing tank as an oxygen-free closed space. A high-temperature and high-speed jet gas flow, which is a flow of combustion gas, crushes the raw material by the jet jet and heats the raw material by the heat held by the combustion gas to contain the raw material contained in the raw material. It has been proposed to evaporate the water or oil that is present so that drying takes place.

As a drying apparatus based on such a concept, as shown in FIG.
A jet burner 2 is installed vertically downward so as to cause a jet jet to flow toward the bottom at the top center position, and a discharge port 3 is provided at the top. A single-screw screw conveyor 4 containing a screw 6 is provided so as to penetrate vertically upward, and a raw material supply port 7 at an upper end of a casing 5 of the screw conveyor 4 is located near a tip of the jet burner 2. With such a configuration, for example, as a raw material,
The sludge 8 discharged from the sewage treatment plant can be extruded and supplied in a direction substantially opposite to a jet jet blowing direction by the jet burner 2. The processing tank 1 located on the outer peripheral side of the upper part of the screw conveyor 4
The bottom wall surface of the screw conveyor 4 is provided with a curved surface portion 9 that rises gently toward the distal end side of the screw conveyor 4 so as to be smoothly continuous with the outer peripheral surface of the distal end portion of the casing 5 of the screw conveyor 4. 3 has a discharge duct 1
0, a separation device 11 for separating gas and solid such as cyclone is connected, and the sludge 8 supplied to a position near the tip of the jet burner 2 by the screw conveyor 4 is generated by the jet burner 2 for combustion. By jetting the jet jet of the gas 12, the sludge 8 is crushed by the jet jet, and the crushed material of the sludge 8 is caused to flow downward toward the bottom along the curved surface portion 9 of the processing tank 1 and then to the side wall. The crushed sludge 8 blown into the processing tank 1 is heated by the heat of the combustion gas 12 so that the crushed material is blown up to the upper part of the processing tank 1 by being placed on a jet jet which is turned upside down. Is dried to a moisture content of, for example, 10%, and the resulting dried sludge 8a is put on the flow of the combustion gas 12 and discharged from the discharge port 3. The drying sludge 8a is recovered by separating from the combustion gas 12 in the separation device 11 through the jet 10 and the semi-dried sludge 8 blown off by the jet stream is treated. When it adheres to the wall surface such as the bottom of the tank 1 and stays in the treatment tank 1 for a long time, the obtained dried sludge 8a
When the sludge 8 that has adhered to the treatment tank 1 for a long time is discharged, the temperature of the dry sludge 8a excessively increases. A jacket 13 is provided on the outer surface of the wall, and a wall of the processing tank 1 is cooled by flowing a low-temperature fluid 14 such as air or water through the jacket 13.
To prevent sludge 8 from adhering to the wall, or
As shown in FIG. 6, an oscillating device 15 is provided outside the processing tank 1 and the wall of the processing tank 1 is vibrated by the oscillating device 15 so that the sludge 8 adheres to the wall of the processing tank 1. A method for preventing such a problem has been proposed.
-300342).

In FIG. 5, reference numeral 16 denotes a fuel supply pipe for supplying fuel such as kerosene to the jet burner 2, and 17 denotes an air supply pipe for supplying compressed air to the jet burner 2. In FIG. 6, reference numeral 18 denotes a bellows disposed at a connection portion between the wall of the processing tank 1 subjected to vibration and the screw conveyor 4 fixed in position.

[0005]

However, in the case of the conventional system in which the wall surface of the processing tank 1 shown in FIG. 5 is cooled by a low-temperature fluid 14, the sludge 8 must be removed by evaporation. Since the water is cooled and condensed on the wall surface of the processing tank 1, the water content of the sludge 8 attached to the wall surface of the processing tank 1 at the wall contact portion does not decrease. Since the higher the content of water or oil, the higher the adhesion, the adhesion of the sludge 8 to the wall of the processing tank 1 is liable to occur, and the attached sludge 8 cannot be removed promptly. There is a problem that the residence time in the processing tank is long.
In the case of the conventional method in which the wall surface of the processing tank 1 is vibrated as shown in FIG. 1, there is a problem that the sludge 8 adheres to the uneven portion of the bellows 18 and heat resistance and metal There is a problem that damage may occur from the problem of fatigue.

In any of the above-mentioned conventional systems, the material supply port 7 of the screw conveyor 4 has a shape obtained by cutting the casing 5 at right angles to the axial direction, and as shown in FIG. 2, the jet jet of the combustion gas 12 collides with the raw material supply port 7,
In this case, as shown by a two-dot chain line in FIG. 7, a vortex 19 is generated at the bottom of the processing tank 1 in a direction opposite to the direction in which the combustion gas 12 is discharged. There is a problem that the sludge 8 or the dried sludge 8a is stored at the bottom and is not quickly discharged.

Accordingly, an object of the present invention is to provide a jet burner type drying apparatus capable of preventing the raw material from adhering or staying in the processing tank for a long time.

[0008]

According to the present invention, in order to solve the above-mentioned problems, a raw material as a target processing object is supplied to a processing tank provided with a jet burner, and a hot gas discharged from the jet burner is supplied to the processing tank. In a jet burner type drying apparatus for collecting a dried material of the raw material exposed to the raw material, a heating device configured to heat a wall surface of the processing tank is provided outside the processing tank. The apparatus is configured to pass an electric heater or a high-temperature fluid.

In a state where the wall surface of the processing tank is heated by the heating device, the jet supplied by the high-temperature and high-pressure combustion gas generated by the jet burner acts on the raw material supplied near the tip of the jet burner. The raw material is crushed by the jet jet, and the crushed material generated at this time is blown up to the upper part of the processing tank by the flow of the combustion gas which collides with the bottom and is turned upward, and is dried by the heat of the combustion gas. Become like At this time, even if the semi-dried material of the raw material adheres to the processing tank wall,
Because the wall surface of the processing tank is heated, the adhered surface of the adhered raw material is dried to reduce the adherence of the raw material, and the raw material adhered to the wall surface of the processing tank is separated from the wall surface. As a result, the raw material is dried in the same manner as other raw materials that do not adhere to the wall surface.

A jet burner for supplying a raw material to be processed to a processing tank provided with a jet burner and exposing the raw material to a hot gas ejected from the jet burner to collect a dried product of the processed raw material. In the type drying device, the flow of the crushed material of the raw material conveyed by the flow of the combustion gas is hindered for a required time at a required circumferential position on the circumference of the required diameter around the raw material supply pipe on the bottom surface of the processing tank. When the weirs are protruded, the staying time of the crushed material of the raw material by the jet jet in the processing tank can be extended by the predetermined time, and the time of exposure to the heat of the combustion gas can be extended. Therefore, a desired dried product in a dry state can be obtained.

Instead of protruding the weir on the bottom surface of the processing tank, the weir is slidably penetrated vertically in the bottom of the processing tank, and each of the weirs is supported by an actuator so as to be capable of driving up and down. When the weir is moved up and down by the actuator to adjust the number of the weirs projecting into the processing tank and the amount of the protrusions, the dried matter in a constant dry state can be obtained from raw materials having different properties. .

The bottom portion of the processing tank has a smoothly continuous curved surface shape, and the side wall portion reduced in diameter toward the upper end discharge port is formed as follows.
With the configuration in which the bottom portion is connected to have a smooth surface, the combustion exhaust gas can be smoothly guided to the discharge port over substantially the entire surface of the processing tank.

[0013] Further, a conical cap protruding toward the tip of the jet burner is attached to the tip of the material supply pipe, and a cut of a required size is formed at a required circumferential position of the tip of the material supply pipe. With the configuration in which the material supply port is formed by the notch, the jet jet of the combustion gas by the jet burner is guided along the outer peripheral surface of the material supply pipe without substantially reducing the flow velocity, and thereafter, the curved surface portion of the processing tank,
Since it can be guided smoothly to the discharge port along the bottom and side walls, it is possible to prevent the occurrence of eddies that have conventionally occurred in the processing tank, and to smoothly dry the raw material from inside the processing tank. To prevent the dried product from staying in the processing tank for a long time.
Further, since the opening surface of the material supply port is opened in parallel with the flow direction of the jet jet, the opening area of the material supply port can be increased without substantially reducing the flow rate of the jet jet. Further, it is possible to prevent the occurrence of clogging due to foreign substances mixed in the raw material.

Further, when the cap is formed in a conical shape with a rounded tip, local overheating and deterioration due to the heat of the combustion gas at the tip of the cap can be suppressed.

[0015]

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

FIGS. 1 (a), 1 (b) and 1 (c) show an embodiment of the present invention, in which a hemispherical bottom portion 20a is gradually moved toward a discharge port 21 provided at an upper end portion. The conical side wall portion 20b whose diameter is reduced is integrally attached to the bottom portion 2b.
The so-called processing tank 20 having a so-called neck-like shape, in which the inner surface of the side wall 20a and the inner surface of the side wall portion 20b have a smoothly continuous curved surface.
And the processing tank 20 is disposed so that the axial center direction is slightly inclined to one side, and the jet burner 2 is directed downward in the vertical direction.
To the required position of the side wall 20b of the processing tank 20, and the tip of the jet burner 2 is
0a, and a raw material supply pipe 23 for supplying sludge 8 as a raw material is installed vertically upward through the lower end of the bottom 20a of the processing tank 20. Thus, the sludge 8 can be supplied from the direction opposite to the jet jet blowing direction by the jet burner 2, and a separation device such as a cyclone (not shown) is connected to the discharge port 21 via the discharge duct 10.

The raw material supply pipe 23 is connected to a raw material supply device such as a uniaxial screw pump (not shown), and the sludge 8 is supplied to the raw material supply tube 23 by the raw material supply device.

The bottom of the processing tank 20 at the periphery of the penetrating portion of the raw material supply pipe 23 at the bottom 20a is shown in FIG.
A curved surface portion 20c that rises gently upward is provided in the same manner as the curved surface portion 9 shown in (1), so that the outer peripheral surface of the raw material supply pipe 23 and the inner surface of the bottom portion 20a smoothly continue, and a curved portion is formed in the processing tank 20. It is prevented from being formed.

Further, an electric heater 22 as a heating device is mounted on almost the entire outer surface extending from the bottom portion 20a of the processing tank 20 to the upper portion of the side wall portion 20b.
Thereby, the wall surface of the processing tank 20 can be heated to a required temperature. At this time, for example, when the sludge 8 generated in the sewage treatment plant is used as a raw material for performing the drying treatment, the temperature of the wall surface of the treatment tank 20 is set to at least 300 ° C. or more.

Further, the raw material supply pipe 23 is shown in FIG.
As shown in (c), a notch 26 having a required width in the circumferential direction and the axial direction is provided at a required circumferential position at the distal end of the raw material supply pipe 23.
Further, a conical cap 24 is attached to the distal end side of the raw material supply pipe 23, and a raw material supply port 25 formed by being surrounded by the cap 24 and the notch 26 is provided in the axial direction. The sludge 8 can be supplied at right angles. The size of the notch 26 is, for example, in the case where the diameter of the raw material supply pipe 23 is 43 mm in consideration of the support strength of the cap 24 and the prevention of clogging of foreign matter that may be mixed into the sludge 8. In
It is desirable to arrange the notches 26 at three circumferential positions with a circumferential width of 35 mm and a vertical width of 40 mm.

The cap 24 is made of a heat-resistant alloy,
For example, it is made of a nickel alloy, and its tip angle is as acute as possible. For example, if the flow rate of the jet jet by the jet burner 2 is about Mach 2, 4
The angle is set to 6 ° or less so that the jet jet is smoothly guided from the conical surface of the cap 24 to the outer peripheral surface of the raw material supply pipe 23 without separating from the surface. Further, on the lower surface of the cap 24, there is provided a conical protrusion 27 protruding to the inside of the raw material supply pipe 23 by a required length, and the protrusion 27 allows the sludge 8 to be conveyed in the raw material supply pipe 23. The sludge 8 can be smoothly guided to each raw material supply port 25 by deflecting the conveying direction to the outer peripheral direction.

The same components as those shown in FIG. 5 are denoted by the same reference numerals.

When a jet jet of the combustion gas 12 is generated by the jet burner 2 in a state where the wall surface of the processing tank 20 is heated to a predetermined temperature by the electric heater 22, the jet jet firstly comes to the upper end of the raw material supply pipe 23. And is guided smoothly as an axial flow along the outer peripheral surface of the raw material supply pipe 23 along the conical surface of the cap 24, and then is formed into a hemispherical shape from below along the curved surface portion 20c. After being gently turned in the direction along the inner surface of the bottom portion 20a, it is guided upward along the inner surface of the side wall portion 20b smoothly connected to the inner surface of the bottom portion 20a, and further smoothly connected to the side wall portion 20b. Discharge duct 10
Will be sent smoothly. In this state,
The sludge 8 extruded and supplied from the raw material supply port 25 is crushed by a jet jet flowing along the raw material supply pipe 23,
The crushed sludge 8 generated by the crushing is supplied to the raw material supply pipe 2.
3 is blown up to the upper part of the processing tank 20 by a jet jet flowing along the curved surface part 20c, the bottom part 20a, and the inner surface of the side wall part 20b of the processing tank 20. The crushed sludge 8 blown up into the processing tank 20 is dried to a required moisture content by the heat of the combustion gas 12.

In the above description, when the sludge 8 in a semi-dry state adheres to the wall surface of the processing tank 20, the electric heater 22 heats the wall surface of the processing tank 20 and keeps it at a high temperature. The contact portion with the wall surface of the processing tank 20 is heated, and the water in the contact portion is evaporated, whereby the sludge 8 is reduced in adhesiveness and peels off from the inner wall surface of the processing tank 20, so that the jet Thus, the sludge 8 is dried in the same manner as the other sludge 8 blown up to the upper part of the processing tank 20.

Dry sludge 8a generated by drying sludge 8
Is led to the outlet 21 along the flow of the combustion gas 12 toward the outlet 21 along the inner surface of the side wall portion 20b, and is sent out to the separation device through the discharge duct 10, so that the separation device has It is separated from the combustion gas 12 and collected.

As described above, the jet jet of the combustion gas 12 by the jet burner 2 is guided along the outer peripheral surface of the raw material supply pipe 23 without reducing the flow velocity, and thereafter, the curved surface portion 20c, the bottom portion 20a, and the side wall portion of the processing tank 20 are formed. Since it is possible to smoothly guide the inner wall surface of the processing tank 20 along the entire surface of the inner wall of the processing tank 20 toward the discharge port 21 along the surface 20b, it is possible to prevent the generation of the vortex 19 as conventionally generated in the processing tank 20. And the flow of the crushed material of the sludge 8 in the treatment tank 20 can be directed to the discharge port 21. If the sludge 8 adheres to the wall surface of the treatment tank 20, The contacting portion of the sludge 8 with the wall surface of the treatment tank 20 was heated and dried to reduce its adhesion, whereby the attached sludge 8 could be peeled off. Therefore, it is possible to prevent the sludge 8 from staying in the treatment tank 20 for a long time, to stabilize the water content of the obtained dried sludge 8a, and to prevent excessive temperature rise of the dried sludge 8a. can do.

Next, FIGS. 2A and 2B show another embodiment of the present invention, in which the jet has the same structure as that shown in FIGS. 1A, 1B, and 1C. In the burner-type drying apparatus, the cap attached to the upper end of the raw material supply pipe 23 is replaced with a cap 24 having a conical tip with a rounded shape.
a, and as still another embodiment, the processing tank 2
0, a jacket 30 is provided so as to cover almost the entire surface from the bottom to the top of the processing tank 20, so that the processing tank 20 has a double wall structure and A configuration in which a fluid supply pipe 28 for supplying the high-temperature fluid 31 is connected to an upper part of the pipe 30, and a fluid discharge pipe 29 for discharging the high-temperature fluid 31 is connected to a lower end of the jacket 30, The high temperature fluid 31 guided through the fluid supply pipe 28 is passed through the jacket 30 so that the heat of the high temperature fluid 31 can heat the wall surface of the processing tank 20 to a required temperature.

The high-temperature fluid 31 fed into the jacket 30 flows all around the fluid supply pipe 28 connected to the jacket 30 so that the connection direction is tangential to the upper part of the jacket 30. It descends while being discharged from the fluid discharge pipe 29. Further, as the high-temperature fluid 31, for example, exhaust gas or steam generated by a heat recovery boiler may be used.

In addition, the same components as those shown in FIGS. 1A, 1B, and 1C are denoted by the same reference numerals.

According to this embodiment, the same effects as those of the above embodiment can be obtained. Further, as the high-temperature fluid 31 passed through the jacket 30, the exhaust gas or the steam generated by the heat recovery boiler can be used. By using such a method, waste heat can be used, so that the cost required for heating the wall surface of the processing tank 20 can be reduced.

Since the cap 24a has a conical shape with a rounded tip and does not have a sharp end which is easily degraded by the high-temperature combustion gas 12, the amount of raw material to be treated is large and the burner output must be particularly large. In the drying apparatus which must be used, the tip of the cap 24a can be prevented from being locally overheated and deteriorated by the heat of the combustion gas 12.

FIGS. 3 (a) and 3 (b) show still another embodiment of the present invention, and FIGS. 1 (a) (b) (c).
On the inner bottom surface of the processing tank 20 having the same configuration as that shown in FIG. 1, a required thickness is provided in a radial direction centering on the raw material supply pipe 23, for example, at a required circumferential interval on a triple concentric circle. And a large number of cylindrical weirs 32 having a required height
Is configured so that the movement of the crushed material of the sludge 8 crushed by the jet stream and conveyed by the flow of the combustion gas 12 is hindered by the weir 32.

The thickness and height of the weir 32 and the location of each weir 32 are determined by the properties of the sludge 8 so that the crushed material of the sludge 8 can be kept in the treatment tank 20 for a desired time. Is set in advance in accordance with. Others are the same as those shown in FIGS. 1 (a), 1 (b) and 1 (c), and the same components are denoted by the same reference numerals.

According to the present embodiment, the crushed material of the sludge 8 crushed by the jet jet flows from the outer peripheral surface of the raw material supply pipe 23 to the curved surface portion 20c, the bottom portion 20a, and the side wall portion 2 of the processing tank.
0b, the movement of the combustion gas 12 is inhibited by the weir 32 for a predetermined time, so that the sludge 8 stays in the treatment tank 12 for the crushed material for the predetermined time. As a result, the time during which the crushed material of the sludge 8 is exposed to the heat of the combustion gas 12 is extended, and the crushed material of the sludge 8 is dried to a target moisture content in a state where the movement of the sludge 8 is inhibited by the weir 32. Therefore, the dried sludge 8a having a predetermined water content can be obtained.

In this embodiment, an electric heater 22 as shown in FIGS. 1A, 1B and 2C or a high-temperature fluid as shown in FIGS. 2A and 2B is provided outside the processing tank 20. A configuration in which a jacket 30 or the like through which the air flows is provided.

FIGS. 4 (a) and 4 (b) show still another embodiment of the present invention, in which a jet burner type drying apparatus having the same configuration as that shown in FIGS. 3 (a) and 3 (b) is shown. In the apparatus, each weir is a long weir 33 extending in the up-down direction, and each weir 33 is arranged so as to penetrate the bottom 20a of the processing tank 20 so as to be slidable up and down. The lower ends of the weirs 33 for each circumference arranged so as to be lined up with each other are connected by a ring member 36, and furthermore, the lower and upper ends of the respective weirs 33 are extended and contracted in conjunction with required lower circumferential portions of each ring member 36. By disposing a plurality of hydraulic cylinders 34 as actuators, and connecting the distal end of a piston rod 35 of each hydraulic cylinder 34 to the lower surface of each ring member 36, each hydraulic cylinder 34 Member 36 As independently lifting drivingly supporting configuration, by arbitrarily setting the elevation of each ring member 36, weir 33 which projects into the treatment tank 20
Can be adjusted in number and height. Further, in the present embodiment, an electric heater 2 as shown in FIGS.
2, or a structure provided with a jacket 30 or the like through which a high-temperature fluid flows as shown in FIGS.

According to the present embodiment, the number of the weirs 33 projecting from the inner bottom surface of the processing tank 20 according to the properties such as the viscosity or the water content of the sludge 8 supplied into the processing tank 20 by the raw material supply pipe 23. The height of the sludge 8 can be adjusted to adjust the time during which the sludge 8 is exposed to the heat of the combustion gas 12 in the treatment tank 20. Therefore, similar sludges 8 having different properties such as viscosity or water content can be obtained. Dry sludge 8a having a water content can be obtained, whereby dry sludge 8a having a constant water content can be obtained even if the properties of sludge 8 to be supplied change on the way.

The present invention is not limited to the above embodiment. In the embodiment shown in FIGS. 1A, 1B and 1C, the electric heater 22 is provided outside the processing tank 20. Although shown as being installed almost entirely, the bottom 20
a, etc., where the adhesion is likely to occur, while the side wall 20b
2 (a) that the power consumption may be reduced by arranging a small amount in a portion where adhesion is unlikely to occur, such as an upper portion of the device.
The jacket 30 in the embodiment shown in FIG.
The high temperature fluid 31 is allowed to flow over the entire surface of the processing tank 2
In order to be able to heat the wall surface of the jacket 30 to a required temperature, the inside of the jacket 30 may be partitioned by a partition plate to form a flow path for guiding the high-temperature fluid 31. 31 may be formed by winding a pipe for passing the outside of the processing tank 20;
The weirs 32, 33 in the embodiment shown in FIGS. 3 (a) (b) and 4 (a) (b) have a columnar shape and are arranged on the circumference so as to be arranged three times in the radial direction. However, if the movement of the sludge 8 can be inhibited for a desired time, the shape may be a flat plate shape, and the number of arrangements in the radial direction may be freely determined. In each of the above embodiments, As the raw material to be subjected to the drying treatment, the one using sludge 8 generated in a sewage treatment plant was shown, but factory sludge and food residues, or
It may be applied to drying of various raw materials including crude oil sludge and oily mud of paint, other water and oil. In addition, the electric heater 22, the jacket 30, and the weirs 32 and 33 are applied to processing tanks of other shapes. It goes without saying that various changes may be made without departing from the spirit of the present invention.

[0039]

As described above, according to the jet burner type drying apparatus of the present invention, the raw material which is the object to be processed is supplied to the processing tank provided with the jet burner, and the hot gas discharged from the jet burner is discharged. In a jet burner type drying apparatus for collecting a dried product of the raw material that has been exposed to the raw material, a heating device configured to heat the wall surface of the processing tank is provided outside the processing tank,
Since the heating device is configured to pass an electric heater or a high-temperature fluid, the adherence of the raw material adhering to the processing tank wall surface can be reduced by heating and drying the adhering portion. It is possible to prevent the material from sticking to the processing tank and staying in the processing tank for a long time, thereby exhibiting an excellent effect that the dried state of the obtained raw material can be stabilized. In a jet burner-type drying apparatus for supplying a raw material to a processing tank equipped with a jet burner and exposing the raw material to a hot gas ejected from the jet burner to collect a dried product of the processed raw material, The flow of the crushed material conveyed by the flow of combustion gas at the required intervals in the circumferential direction on the circumference of the required diameter centered on the raw material supply pipe at the required time By providing a weir to project damage, the time required for the crushed material of the raw material pulverized by the jet jet to be exposed to the heat of the combustion gas can be sufficiently secured, and the desired dry state can be obtained. A dried product can be obtained, and further, instead of protruding the weir on the bottom surface inside the processing tank, the weir is slidably penetrated vertically through the bottom of the processing tank, and each weir is raised and lowered by an actuator. Driving is supported, and the weir is moved up and down by the actuator to adjust the number of the weirs projecting into the treatment tank and the amount of the weirs. Demonstrates the excellent effect of being able to obtain a dried product in a state,
The bottom of the processing tank has a smoothly continuous curved surface shape.
If the side wall part reduced in diameter toward the upper end discharge port is connected to the bottom part so as to have a smooth surface, the combustion exhaust gas can be smoothly guided to the discharge port over substantially the entire surface of the processing tank. Also, a conical cap projecting toward the tip of the jet burner is attached to the tip of the material supply pipe, and a notch of a required size is provided at a required circumferential position of the tip of the material supply pipe. With the configuration in which the raw material supply port is formed, the jet jet of the combustion gas by the jet burner is guided along the outer peripheral surface of the raw material supply pipe without substantially reducing the flow velocity, and thereafter, the curved surface portion, the bottom portion, the side wall portion of the processing tank Along the flow path to the discharge port, preventing the occurrence of eddy currents in the processing tank, which has conventionally occurred in the processing tank. Can be prevented, and furthermore, by making the cap a conical shape with a rounded tip, it is possible to suppress local overheating and deterioration due to the heat of the combustion gas of the cap. Exhibits excellent effects such as

[Brief description of the drawings]

FIG. 1 shows an embodiment of a jet burner type drying apparatus of the present invention, in which (a) is a schematic side view of cutting, (b) is an enlarged view of a portion A of (a), and (c) is ( It is a BB arrow line view of b).

FIG. 2 shows another embodiment of the present invention.
Is a schematic side view partially cut away, and (b) is an enlarged view of a portion C of (a).

FIG. 3 shows still another embodiment of the present invention.
(A) is a schematic cross-sectional side view, and (B) is a view taken along the line DD of (A).

FIG. 4 shows still another embodiment of the present invention.
(A) is a schematic cross-sectional side view, and (B) is a view taken along the line EE of (A).

FIG. 5 is a cut-away side view schematically showing an example of a conventional burner type drying apparatus.

FIG. 6 is a cut-away side view schematically showing another example of a conventional burner-type drying device.

FIG. 7 is an enlarged cut-away side view schematically showing the bottom of a conventional burner type drying apparatus.

[Explanation of symbols]

 2 Jet burner 8 Sludge (raw material) 8a Dry sludge (dry matter) 12 Combustion gas 20 Processing tank 20a Bottom part 20b Side wall part 20c Curved surface part 21 Discharge part 22 Electric heater (heating device) 23 Raw material supply pipe 24, 24a Cap 25 Raw material supply Mouth 26 Notch 30 Jacket 31 High temperature fluid 32 Weir 33 Weir 34 Fluid pressure cylinder (actuator)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tomozumi Kosugi 2-1-1, Toyosu, Koto-ku, Tokyo Ishikawajima-Harima Heavy Industries Co., Ltd. Tokyo 1st Factory (72) Inventor Kazuo Masuda 2-chome, Toyosu, Koto-ku, Tokyo No. 1-1 Ishikawajima Harima Heavy Industries Co., Ltd., Tokyo Daiichi Plant (72) Inventor Jun Sato Kamei Co., Ltd. Tokyo Branch, 7th Floor, Otemachi Building 1-6-1 Otemachi, Chiyoda-ku, Tokyo (72) Inventor Harizawa Rii 7-floor, Otemachi Building, 1-6-1 Otemachi, Chiyoda-ku, Tokyo F-term in the Tokyo branch of Kamei Corporation (reference) 3L113 AA07 AB05 AB10 AC04 AC08 AC15 AC45 AC46 AC48 AC49 AC54 AC59 AC60 AC63 AC72 AC73 AC79 AC90 BA37 CA02 DA05 DA06 DA07 DA11 DA20 DA21 4D059 AA03 AA10 BD01 BD11 BD24 BK11 CA10 CB06 CB17

Claims (7)

[Claims] 1. A jet burner for supplying a raw material as a target processing object to a processing tank provided with a jet burner, and exposing the raw material to a hot gas ejected from the jet burner to collect a dried product of the processed raw material. A jet burner-type drying device, comprising: a heating device configured to heat a wall surface of the processing tank outside the processing tank. 2. The jet burner type drying apparatus according to claim 1, wherein the heating device is configured to pass an electric heater or a high-temperature fluid. 3. A jet burner for supplying a raw material as a target processing object to a processing tank provided with a jet burner, and exposing the raw material to a hot gas ejected from the jet burner to collect a dried product of the processed raw material. In the type drying device, the flow of the crushed material of the raw material conveyed by the flow of the combustion gas is hindered for a required time at a required circumferential position on the circumference of the required diameter around the raw material supply pipe on the bottom surface of the processing tank. Burner type drying device characterized by having a configuration in which a weir is provided protruding therefrom. 4. Instead of protruding a weir on the bottom surface inside the processing tank, the weir is slidably penetrated vertically in the bottom of the processing tank, and each weir is supported by an actuator so as to be able to be driven up and down. 4. The jet burner type drying apparatus according to claim 3, wherein the weir is moved up and down by the actuator to adjust the number of the weirs projecting into the treatment tank and the amount of the weirs. 5. The processing tank according to claim 1, wherein the bottom portion of the processing tank has a smoothly continuous curved surface shape, and a side wall portion reduced in diameter toward a discharge port at an upper end is connected to the bottom portion so as to have a smooth surface. 5. The jet burner type drying device according to 3 or 4. 6. A conical cap projecting toward the tip of the jet burner is attached to the tip of the raw material supply pipe, and a cut of a required size is formed at a required circumferential position of the tip of the raw material supply pipe. 6. The jet burner type drying apparatus according to claim 1, wherein the material supply port is formed by notching. 7. The jet burner type drying apparatus according to claim 6, wherein the cap has a conical shape with a rounded tip.