JPH073139Y2 - Structure for preventing sticking of burned materials to carbonization cans in carbonization equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbonization equipment for carbonizing and burning a flame-retardant substance such as plastic, especially so that a melt or a viscous substance generated during carbonization does not adhere to the inner wall of a carbonization can. The structure of the dry distillation can.

[0002]

2. Description of the Related Art Conventionally, a combustion furnace has been used in which various industrial wastes are put in a furnace and incinerated or heat is recovered like a boiler. Among such combustion furnaces, those that dry-distill a particularly flame-retardant substance and recover the heat of the dry-distilled gas generated at this time are widely used. For example, one of them is disclosed in Japanese Utility Model Publication No. 2-20591, and its outline is shown in FIG.

In the figure, a vertical type dry distillation can 1 for charging burned material and dry distillation of the burned material is arranged, and a heat recovery device 20 for recovering heat by the dry distillation gas obtained by this is installed in the dry distillation can 1.
Connected to. The heat recovery device 20 is provided with a water pipe 21 for use as a hot water boiler, for example, and is provided with a cyclone 22 for dust collection and a flue 23 downstream thereof.

The carbonization can 1 has a charging port 2 for the burned material at the upper end thereof.
Is provided, and the lower end has a cylindrical shape with a burner 3 that can be ignited from the outside. A preliminary fuel injection nozzle 25 or the like is provided in the duct 24 for flowing the dry distillation gas generated during the dry distillation to the heat recovery device 20 to improve the efficiency of heat recovery.

[0005]

[Problems to be Solved by the Invention] Since various kinds of miscellaneous flame-retardant substances are contained in industrial waste, when the temperature gradually rises during dry distillation to reach the melting point of the substance, it becomes in a molten state. Therefore, it is necessary to periodically take out such a melt, including the rest of other flame-retardant substances that could not be incinerated after dry distillation. This operation is performed using the cleaning port 26 provided at the lower end of the dry distillation can 1.

On the other hand, since the burned material is charged from the upper end side of the carbonization can 1, the melt generated during the carbonization process gradually adheres to the inner wall of the carbonization can 1 and gradually drops downward. At this time,
Since the inner wall of the carbonization can 1 is a solid lined with a steel plate or the like, once the melt adheres, it cannot easily be peeled off. Therefore, in the portion close to the burner 3, it is possible to promote the melting of the burned material and continue the dry distillation, but on the upper end side far from the burner 3, the melt gradually grows and gradually squeezes the inside of the dry distillation can 1. The phenomenon occurs. Therefore, combustion of the burned material continues on the lower end side of the carbonization can 1 and the inside becomes hollow, and the upper end side is clogged by the growth of the melt.

As described above, if the melt remains attached to the inner wall of the carbonization can 1 from the middle of the height direction to the upper end side, a great obstacle occurs in the carbonization of the burned material, and in the case of recovering heat. Thermal efficiency is also greatly reduced. Further, in order to remove the melted material attached to the inner wall of the carbonization can 1, it is necessary to work inside the dry distillation can 1, which imposes a heavy work load and lowers the operation rate.

The problem to be solved in the present invention is to prevent the melt from adhering to the inner wall of the carbonization can, and to always carry out an appropriate carbonization treatment of the burned material.

[0009]

SUMMARY OF THE INVENTION The present invention is provided with a carbonization can for combusting a material to be combusted by combustion, and an inlet for the material to be combusted is provided at the upper end of the carbonization can and a burner or the like is provided at the lower end. A dry distillation apparatus equipped with a combustion source, wherein an inner wall of the dry distillation can from the upper end side downward is arranged with a plurality of adhesion preventing plates in a longitudinal direction in the circumferential direction, and the adhesion preventing plates are It is characterized in that a taper having a lower end side inclined toward the inner wall side of the carbonization can is formed on the surface facing the center side inside the carbonization can.

[0010]

The function of the anti-adhesion plate vertically arranged along the inner wall of the carbonization can divides the inner wall of the carbonization can into the circumferential direction. For this reason, even if a large mass of burned material or viscous material is generated during carbonization, it contacts the inner wall of the carbonization can in the form of being divided by the adhesion prevention plate. Therefore, as compared with the case where a large lump directly contacts and adheres to the inner wall, the adhesive force of the molten material or the viscous material is weakened. Moreover, since the lower end of the surface of the anti-adhesion plate facing the center of the carbonization can has a taper with the lower end inclined outward, the inclination of the taper tends to drop the adhered substance downward.

As described above, at the stage where the molten material or the viscous material begins to adhere to the inner wall of the carbonization can, the lumps are divided by the adhesion preventing plate to weaken the adhesive force as described above, and the adhered material grows. If, at some stage, the thickness exceeds the taper of the anti-adhesion plate, the deposit will be cut off. Therefore, adhesion of a melted material, a viscous material, or the like generated during carbonization to the inner wall is prevented, and proper combustion and carbonization conditions are maintained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially cutaway front view of a carbonization can, which is incorporated in a part of a heat recovery system as shown in FIG.

In the figure, a dry distillation can 1 is provided with a charging port 2 at the upper end thereof and a movable lid 2a for sealing the charging port 2 with a water sealing structure. Further, a burner 3 that can be ignited from the outside is provided at the lower end of the carbonization can 1, and a cleaning port 4 with a door 4a for internal cleaning is provided at an appropriate position. Reference numeral 5a is an evaporation pipe for supplying the generated gas to another heat recovery system and the like, and 5b is a safety valve for maintaining the combustion pressure during carbonization at a constant value. Further, a water cooling jacket 1b for cooling is provided as a double pipe structure in almost the lower half of the inner wall 1a of the dry distillation can 1.

The inner wall 1a of the carbonization can 1 is provided with an adhesion prevention plate 6 for preventing the melted or viscous material generated during the carbonization from adhering to the inner wall 1a. As shown in the plan view of the inside of the dry distillation can 1 of FIG. 2, a plurality of the adhesion preventing plates 6 are arranged at a constant circumferential pitch and are fixed so as to extend from the top to the bottom along the inner wall 1a. Note that, in FIG. 1, only one anti-adhesion plate 6 is drawn for easy understanding.

FIG. 3 shows the details of the anti-adhesion plate 6. The surface of the dry distillation can 1 which faces the inner wall 1a is formed in a straight line which is parallel to the vertical direction of the inner wall 1a. On the other hand, the surface of the carbonization can 1 that faces the center is provided with a taper 6a that becomes thinner on the lower end side. The upper end of the adhesion prevention plate 6 is fixed to a bracket 1c protruding from the inner wall 1a toward the center of the carbonization can 1 by bolts and nuts 1d as shown in FIG. Further, the lower end of the adhesion preventing plate 6 is inserted into and restrained by the stay 1e protruding from the inner wall 1a as shown in FIG.

As shown in FIG. 2, the anti-adhesion plate 6 is arranged so that its taper 6a projects toward the center side, and, as shown in FIG. 1, between the inner wall 1a of the carbonization can 1 and the water cooling jacket 1b. It is installed so that a gap 7 having an appropriate size can be formed.

In the above construction, the burned material is charged from the charging port 2 at the upper end of the carbonization can 1, and then the lid 2a is closed and the burner 3 is ignited to dry-burn the burned material. Then, the high temperature carbonization gas generated at this time is used to recover heat, for example, as described in the conventional example.

The heating by the burner 3 causes the burned material to melt or become viscous depending on the type of the burned material, and these melted or viscous materials tend to adhere to the inner wall 1a of the carbonization can 1. On the other hand, since the plurality of anti-adhesion plates 6 run in the longitudinal direction over the entire inner wall 1a in the circumferential direction, the adhering anti-adhesion plates 6 that are adjacent to each other separate the melted material, the viscous material, etc. Will be in contact with. For this reason, even if a large lump of melted or viscous material is formed on the upper end side inside the carbonization can 1, it is finely divided when they touch the inner wall 1a, so that the inner wall 1a is larger than that in the case of a large lump. It also weakens the adhesion to.

Further, the taper 6a of the surface of the adhesion preventing plate 6 facing the center is inclined so as to be directed outward as it goes downward. Therefore, the melted material or the viscous material that has adhered to the inner walls 1a on both sides of the adhesion preventing plate 6 is pushed downward by the inclination of the taper 6a. Therefore, the attached matter is divided by the attachment prevention plate 6 and at the same time, receives an acting force of dropping the attached matter to suppress the attachment to the inner wall 1a. In other words, the virtual line drawn by connecting the respective tapers 6a of the plurality of the adhesion preventing plates 6 arranged has a shape close to a conical shape with a widened bottom. Therefore, the more the adhesion preventing plates 6 are provided, the more easily the melted material or the viscous material is dropped downward, and the adhesion to the inner wall 1a is prevented.

Further, since there is a gap 7 between the adhesion preventing plate 6 and the inner wall 1a and the water cooling jacket 1b, for example, when the adhesion preventing plate 6 is provided by directly protruding from the inner wall 1a like a rib, a corner portion is formed. As compared with the case where the melted substance or the viscous substance is easily formed and the adhered substance slides down from the gap 7, the adhered substance does not remain.

By providing the plurality of adhesion preventing plates 6 in the vertical direction in this manner, it is possible to prevent the adhesion of substances to the inner wall 1a. Therefore, inside the dry distillation can 1, when the combustion gradually spreads from the burned material charged at the lower end to the burned material on the upper side, the space on the upper side is narrowed by the melt or the viscous material. Never. Therefore, the carbonization is properly performed, and efficient combustion and heat recovery are maintained.
Further, by collecting the melt and other deposits at the bottom of the carbonization can 1, it becomes possible to sufficiently perform the combustion process by the burner 3.

Further, since the deposits left on the inner wall 1a of the dry distillation can 1 are eliminated, the inside of the dry distillation can 1 can be easily cleaned and the operating rate can be improved.

[0023]

EFFECTS OF THE INVENTION In the present invention, the adhesion preventing plate can suppress the adhesion of melted substances, viscous substances and the like generated during carbonization to the inner wall of the carbonization can. Therefore, the deposits do not grow on the upper end side of the carbonization can, the proper carbonization and combustion are always maintained, and a high heat recovery rate can be obtained when used for heat recovery or the like. In addition, since the dry distillation can itself does not have deposits inside it, cleaning is easier and the operating rate is improved compared to the conventional case.

[Brief description of drawings]

FIG. 1 is a cutaway front view of a main part of a carbonization can equipped with a structure for preventing adherence of a burned material according to the present invention.

FIG. 2 is a plan view of a dry distillation can for showing an arrangement of an adhesion prevention plate.

FIG. 3 is a front view of an adhesion prevention plate.

4A and 4B are diagrams showing a mounting structure of an upper end portion of an adhesion prevention plate, wherein FIG. 4A is a front view and FIG. 4B is a plan view.

5A and 5B are diagrams showing a mounting structure of a lower end portion of an adhesion prevention plate, in which FIG. 5A is a front view and FIG. 5B is a bottom view.

FIG. 6 is a schematic view showing a conventional example of a heat recovery system including a dry distillation can.

[Explanation of symbols]

 1 dry distillation can 1a inner wall 1b water cooling jacket 2 charging port 3 burner 6 anti-adhesion plate 6a taper

Claims (1)

[Scope of utility model registration request] 1. A dry distillation apparatus comprising a carbonization can for gasifying a burned material by dry distillation by combustion, and a charging port for the burned material being provided at an upper end side of the dry distillation can and a combustion source such as a burner at a lower end side thereof. There, the inner wall of the carbonization can from the upper end side downward, a plurality of anti-adhesion plate of a posture that runs in the vertical direction are arranged in the circumferential direction, the anti-adhesion plate is located in the center of the inside of the carbonization can. On the facing side,
A structure for preventing sticking of a burned material to a carbonization can in a carbonization equipment, wherein a taper is formed whose lower end is inclined toward the inner wall of the carbonization can.