JP2003148717A - Method for removing substance stuck inside dry distillation gas conduit, method and device for heat treatment of substance to be treated - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate solid substances adhered to the inner wall of a pipe by periodically cleaning a dry distillation gas conduit. SOLUTION: A dry distillation gas produced in the first and second rotary kilns 21 and 22 by a heat treatment is fed to a dry distillation gas burner reactor 14 through a dry distillation gas conduit 13. In the dry distillation gas conduit 13, a cleaning apparatus storage pipe 36 comprising a cleaning unit therein, and a ring-shaped pipe 38 which is connected with the cleaning apparatus storage pipe 36 are included. The cleaning apparatus storage pipe 36 includes a pipe conveyor in which blades 42 are equipped to a towline body 41 at regular intervals. The towline body 41 is installed to go round in the pipe 38 and driven by a drive source 43. The blades 42 are located not to exist at a position where the dry distillation gas conduit 13 is located during a normal operation so as not to disturb a flow of the dry distillation gas by the blades 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various kinds of materials (for example, waste, etc.) containing flammable components such as organic components.
A dry distillation gas conduit that removes and cleans deposits on the pipe wall inside the dry distillation gas conduit that is used as a means to guide the dry distillation gas that has been generated to the next step (combustion processing, etc.) when heat-treating various dried products, carbides, etc. The present invention relates to a method for removing deposits, a heat treatment method for an object to be treated, and a heat treatment apparatus.

[0002]

2. Description of the Related Art When heat-treating various objects to be treated containing flammable components (for example, wastes, various dried objects, carbides, etc.), the objects to be treated are put into a thermal decomposition treatment container and It is known that dry distillation (steaming) generates a dry distillation gas by heating from the outside and also obtains a carbide.

[0003] The material to be processed differs among various kinds of waste (general waste, industrial waste, etc.), sludge, incinerated ash, fly ash, contaminated soil, construction waste, various shredder dust, metal scrap, organic substances, etc. There are various flammable component contents.

Cooling of the dry-distilled gas passing through the dry-distilled gas conduit causes serious combustible components such as tar to solidify on the inner wall of the conduit, causing clogging in the worst case and burning of the adhered tar. It is known to lead to an accident, and as a method for regularly cleaning the conduit, Japanese Patent Laid-Open No. 2001-2001
No. 90934 is known.

Alternatively, Japanese Patent Laid-Open No. 2001-192667 and the like are known as a technique for heating the conduit from the outside and keeping it warm to prevent blockage.

[0006]

(A) The above-mentioned Japanese Patent Laid-Open No. 200
Although it is possible to effectively remove deposits by using the means for cleaning the inner wall of the pipe by using the means according to 1-90934,
The work frequency is high and complicated. (B) On the other hand, the means according to Japanese Patent Laid-Open No. 2001-192667 prevents adhesion by providing a heat insulating means on the outside, but with this means, it is difficult to ensure the prevention of deposits over time. .

Moreover, the easily adhering portion is the portion where the gas flow changes, such as the portion where the flow direction of the dry distillation gas conduit changes, the portion where the projection exists, and the temperature is lowered by simply providing a heat insulating material. It is difficult to prevent the adhesion and the solidification of the deposits only by the preventing means.

The present invention has been made in view of the above circumstances, and the dry distillation gas conduit can be regularly cleaned with a simple means to remove and remove solid matter adhering to the inner wall of the tube at the same time. An object of the present invention is to provide a method for removing deposits from a dry distillation gas conduit for burning an object, a method for heat-treating an object to be treated, and a heat-treatment apparatus.

[0009]

[Means for Solving the Problems] A dry distillation gas (including a combustible component) generated by thermally decomposing an object to be processed containing a combustible component is treated in the next step (for example, the generated dry distillation gas is burned). A carbonization gas conduit is used to lead to the carbonization gas combustion furnace). The temperature of this carbonization gas conduit is, for example,
If the temperature is around 250 ° C or less (there is a difference depending on the combustible components in the gas), the unburned components (tar, oil) in the dry distillation gas will adhere to the inner wall of the conduit and solidify to reduce the inner diameter of the conduit, or at worst. In the case of, the pipe will be blocked, resulting in the stop of operation and an accident.

Therefore, it is necessary to periodically clean the dry distillation gas conduit to clean and remove the solid matter adhering to the inner wall of the conduit. The removed solid matter is discharged into a dry distillation gas combustion furnace and subjected to high temperature combustion treatment.

In the cleaning device, a dry distillation gas conduit and a cleaning tool accommodating pipe are connected to form an annular conduit, and a flexible index body is provided in the annular conduit and cleaning is provided at a constant interval on the index body. It is composed of tools (blades). The cleaning tool (blade) is placed in the annular pipe line at regular intervals with the length being about half the length of the index body without being arranged in the entire annular pipe line. During operation, only the flexible member consisting of an index body is present in the dry distillation gas conduit so as not to obstruct the flow of dry distillation gas, and at the time of cleaning, the blade part circulates in the pipeline for a certain time and the inner wall of the pipeline Make sure to scrape off and remove deposits such as tar that adhere to the.

In order to achieve the above object, the present invention uses a dry distillation gas generated by heating an object to be processed containing an organic component by a heat treatment means through a dry distillation gas conduit to produce a combustible gas for the next step. A method of performing heat treatment for burning and removing the combustible component contained in the dry distillation gas by introducing the dry distillation gas to a means for burning and removing the dry component gas, and forming an annular pipe line by connecting the dry distillation gas conduit and the cleaning tool housing pipe. An endless index body is provided in the annular pipe, a cleaning tool is provided at a constant interval on the index body to form a pipe conveyor, and the cleaning tool is circulated so that the solids attached to the pipe wall of the carbonization gas conduit are circulated. It removes things.

Further, the dry distillation gas generated by heating the object containing the organic component by the heat treatment means is introduced through the dry distillation gas conduit to the combustible component combustion removal means of the next step, and the dry distillation gas is removed. In a heat treatment method for burning and removing a combustible component contained, a dry distillation gas conduit and a cleaning tool housing pipe are connected to form an annular pipe line, and an endless index body is provided in the annular pipe line. The index body is provided with a cleaning tool at regular intervals to form a pipe conveyor, and the cleaning tool is circulated to remove solid matter adhering to the tube wall of the carbonization gas conduit, and the solid matter is burned to remove combustible components. It is burned and removed by means.

Further, the dry distillation gas generated by heating the object containing the organic component in the thermal decomposition treatment apparatus is introduced into the combustible component combustion apparatus of the next step through the dry distillation gas conduit, and the dry distillation gas is discharged. A heat treatment device for burning and removing combustible components contained therein, wherein a dry distillation gas pipe and a cleaning tool storage pipe are connected to form an annular pipe line, and the annular pipe line is combustible with a thermal decomposition treatment device. A pipe conveyer is arranged between the component combustion device and a cleaning tool for removing deposits on the tube wall in the cleaning tool storage pipe, and the cleaning tool is driven to adhere to the tube wall of the carbonization gas conduit. It removes and cleans solids.

The pipe conveyor is constructed by arranging an endless flexible index body therein and providing the flexible index body with at least one cleaning tool for removing deposits on the inner wall of the conduit. It is desirable to install several to ten or more cleaning tools at 50 cm intervals.

During the heat treatment operation, only the flexible index body is arranged in the dry distillation gas conduit, and in the normal operation, the cleaning tool (blade) is not arranged in the dry distillation gas conduit. , The blade should be positioned so that it does not affect the flow of dry distillation gas. Only during cleaning does the blade move in the carbonization gas conduit through which the carbonization gas flows.

The pipe conveyor is arranged so as to be inserted through the combustible component combustion device. With such a configuration, the solid matter removed by cleaning is discharged into the combustion device and burned and removed. In this case, in order to directly discharge, a dry distillation gas conduit is inserted into the combustion device, an openable and closable lid is arranged, and it is opened during cleaning and closed during normal operation.

Generated by compulsorily supplying the dry distillation gas into the combustor by compulsorily supplying the dry distillation gas into the combustible component combustor by providing a forced ventilation means adjacent to the pipe conveyor. Ensure a smooth flow of dry distillation gas.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of the present invention. In FIG. 1, a heat treatment furnace into which an object to be treated containing an organic component is charged, and this heat treatment furnace 11 is a hot air gas generation furnace (hot air stove) as a heating means. ) 12 and a heat treatment means (or a thermal decomposition treatment device). The hot air gas from the hot air furnace 12 is supplied to the heat treatment furnace 11, and the object to be treated in the heat treatment furnace 11 is heated by the hot air gas.

The dry distillation gas generated by heating an object to be processed in the heat treatment furnace 11 is a dry distillation gas combustion furnace 1 which constitutes a means for burning and removing combustible components via a dry distillation gas conduit 13.
Introduced in 4. As will be described later in detail, carbonization gas conduit 13
Is connected to a cleaning tool storage pipe 36 having a cleaning device inside to form an annular conduit 38. Dry distillation gas combustion furnace 14
Is equipped with a gas burner 14a.

After the combustible components contained in the dry distillation gas are burned and removed in the dry distillation gas combustion furnace 14, the combustion gas is converted into a heat exchanger 15,
It is discharged from the chimney 17 through the bag filter 16.

The residue (carbide) is discharged from the heat treatment furnace 11 and the hot air gas after use is discharged, and a part of the hot air gas is circulated and used.

FIG. 2 is a schematic front view showing the first embodiment of the present invention. The same parts as those in FIG. The heat treatment means (or thermal decomposition treatment apparatus) in FIG. 1 is composed of first and second rotary kilns 21 and 22 in FIG.

The first and second rotary kilns 21 and 22 have rotary cylinders 23 and 24, and gas ducts are formed on the outer circumferences of the rotary cylinders 23 and 24 to introduce hot air gas therein, thereby rotating the rotary cylinders 23 and 24. Heating jackets 25, 26 as external heating means for heating the rotating cylinders, support rollers 27, 28 for rotatably supporting the rotating cylinders 23, 24 on both sides, and a rotation driving means for rotating the rotating cylinders 23, 24. 29, 30
Composed of and.

The rotary drive means 29, 30 are not shown explicitly, but the drive motor, drive gear and rotary cylinders 23, 2
The drive motor is controlled by a motor controller (not shown).

A supply side duct 31 is provided on the workpiece supply side of the rotary cylinder 23, and a discharge side duct 32 is provided on the process article discharge side of the rotary cylinder 24. Further, the upper and lower first and second rotary kilns 21 and 22 are connected by a processed material transport duct 33, and the processed material processed by the first rotary kiln 21 moves through the transport duct 33 as indicated by an arrow in the figure. Second
It is conveyed into the rotary kiln 22.

Introducing ports 34 and 35 for introducing the dry distillation gas into the dry distillation gas conduit 13 are provided above and below the transport duct 33.
The dry distillation gas conduit 13 is connected to a cleaning tool housing pipe 36 having a cleaning device inside to form an annular pipe line 38, and is also connected to a dry distillation gas combustion furnace 14 that constitutes combustible component combustion removing means. It When the gas is introduced into the dry distillation gas combustion furnace 14 from the dry distillation gas conduit 13, it is introduced into the dry distillation gas combustion furnace 14 together with the circulation gas supplied from the circulation gas supply passage 37, as will be described later in detail.

The hot air oven 12 is provided with a burner 12a, and hot air gas generated here is supplied from the heating jacket 26 to the heating jacket 25 to heat the first and second rotary kilns 21 and 22. , Discharged or recycled.

FIG. 3 is a schematic configuration diagram of the essential parts of the first embodiment of the present invention. The same parts as those in FIGS. 1 and 2 are designated by the same reference numerals. FIG. 3 shows an embodiment during normal operation. As shown in FIG. 3, the dry distillation gas conduit 13 and the cleaning tool housing pipe 36 are connected to form an annular conduit 38. A part of the lower part of 38 is introduced into the hot air stove 12 and also into the dry distillation gas combustion furnace 14.

The hot air stove 12 and the dry distillation gas combustion furnace 14 are connected by a heat insulating connector 39, and the heat insulating connector 3
An annular conduit 38 is housed in the housing 9. The dry distillation gas conduit 13 and the processed product transport duct 33 are connected by connecting pipes 40, 40.

The cleaning tool storage tube 36 is provided with cleaning tools (blades) 42 attached to the index body 41 at regular intervals, and is constructed in a so-called pipe conveyor system. It is configured to be driven in a pipe conveyor. The index body 41 is configured to go around the inside of the annular conduit 38, but the blade 42 is positioned at the position of the carbonization gas conduit 13 during normal operation (during the object heat treatment operation). It is arranged so as not to exist, and is configured so that the blade 42 does not prevent the flow of the dry distillation gas.

The circulating gas supply passage 37 is an annular pipe line 3.
It is attached to the lower part of 8 and communicates. One end of the circulating gas supply path 37 is configured into an ejector nozzle 44 and introduced into the dry distillation gas combustion furnace 14, and a dry distillation gas blowing blower 45 is provided at the other end thereof. Are mixed, supplied from the ejector nozzle 44 to the dry distillation gas combustion furnace 14, and burned by the burner 14a. The heated gas after combustion is discharged from the heat exchanger 15 through the bag filter 16 and the chimney 17.

Below the annular pipe 38 located in the dry distillation gas combustion furnace 14, an annular pipe 3 is provided by a blade 42.
An opening / closing lid 46 that is opened / closed by an external operation is provided for burning the solid matter (adhered matter) when the inside of 8 is cleaned in the dry distillation gas combustion furnace 14.

FIG. 4 is a schematic configuration diagram when the solid matter attached to the inner wall of the annular pipe 38 is cleaned in the first embodiment, and FIG. 4 shows that the blade 42 is driven by the drive source 43 to carry out dry distillation. This is when the inner wall of the gas conduit 13 is being cleaned. FIG. 5 is a perspective view showing a state in which the solid matter 51 is attached to the inner wall of the carbonization gas conduit 13, and the solid matter 51 is removed by the blade 42 to form an annular conduit 38.
Is deposited at the bottom of the. Removed deposits (such as tar)
The open / close lid 46 is opened to discharge the carbon dioxide into the dry distillation gas combustion furnace 14 for combustion. It should be noted that after cleaning the inside of the annular conduit 38, the blade 42 is moved to the cleaning tool storage pipe 36.

FIG. 6 is a schematic diagram showing a second embodiment of the present invention. This second embodiment is for normal operation, and is a part of the lower portion of the carbonization gas conduit 13 forming an annular pipe line 38. Is passed through the inside of the dry distillation gas combustion furnace 14. The operation and the like are the same as those of the first embodiment, and the blade 42 is located on the cleaning tool storage pipe 36 side during normal operation so that it does not obstruct the dry distillation gas flow. That is, only the index body 41 is positioned in the dry distillation gas conduit 13.

[0036]

As described above, according to the present invention,
The following effects can be obtained. (A) Since a part of the annular pipe (pipe conveyor system) is used as a dry distillation gas conduit and cleaning is performed by a cleaning tool (blade) that moves inside, a component such as tar in the dry distillation gas is a dry distillation gas conduit. Even if it adheres to the inner wall, the adhered matter can be effectively removed. (B) Therefore, instability factors such as functional deterioration of the carbonization gas pipe, blockage, operation stop of the device, and induction of an accident can be eliminated, and stable operation of the device and maintenance of the facility can be secured. (C) By using the technology of the pipe conveyor to selectively use the portion with the blade and the portion without the blade, the blade is normally retracted (during the heating treatment operation of the object to be treated) from the dry distillation gas passage. Therefore, it does not adversely affect the flow of dry distillation gas. On the other hand, at the time of cleaning, by introducing and moving the blade into the dry distillation gas passage, it is possible to scrape off the adhered material on the pipe wall and effectively clean it with a simple structure.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of the invention.

FIG. 2 is a schematic configuration diagram showing a first embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of the first mode during normal operation.

FIG. 4 is a schematic configuration diagram when cleaning the pipeline according to the first embodiment.

FIG. 5 is a perspective view showing a state of removing deposits in the dry distillation gas conduit section.

FIG. 6 is a schematic configuration diagram showing a second embodiment of the present invention.

[Explanation of symbols]

11 ... Heat treatment furnace 12 ... Hot air gas generation furnace 13 ... Carbonization gas conduit 14 ... Dry distillation gas combustion furnace 15 ... Heat exchanger 16 ... Bug filter 17 ... Chimney 21, 22 ... First and second rotation kiln 23, 24 ... Rotating cylinder 25, 26 ... Heating jacket 33 ... Treated material transport duct 36 ... Cleaning tool storage 37 ... Circulating gas supply path 38 ... Circular pipeline 39 ... Thermal insulation connection 41 ... Index body 42 ... Blade (cleaning tool) 43 ... Drive source 51 ... Adhered matter

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C10B 53/00 C10B 53/00 Z F23G 5/027 Z F23G 5/027 B09B 3/00 ZAB

Claims (7)

[Claims] 1. A dry distillation gas generated by heating an object to be processed containing an organic component by a heat treatment means is led to a combustible component combustion removal means of the next step through a dry distillation gas conduit,
A method of heat treatment for burning and removing combustible components contained in dry distillation gas, wherein a dry distillation gas conduit and a cleaning tool housing pipe are connected to form an annular conduit, and the end is in the annular conduit. Characterized in that the index body is provided with a cleaning tool at regular intervals to form a pipe conveyor, and the cleaning tool is circulated to remove solid matter attached to the tube wall of the carbonization gas conduit. A method for removing deposits from a dry distillation gas pipe. 2. A dry distillation gas generated by heating an object to be processed containing an organic component by a heat treatment means is led to a combustible component combustion removal means of the next step through a dry distillation gas conduit,
In the heat treatment method for burning and removing the combustible component contained in the dry distillation gas, an annular conduit is formed by connecting the dry distillation gas conduit and the cleaning tool housing pipe, and an endless index body is provided in the annular conduit. The index body is provided with a cleaning tool at regular intervals to form a pipe conveyor, and the cleaning tool is circulated to remove solid matter adhering to the tube wall of the carbonization gas conduit and to burn the solid matter. A method for heat-treating an object to be treated, characterized in that the component is burned and removed by means for burning and removing the sexual component. 3. A dry distillation gas generated by heating an object containing an organic component in a thermal decomposition treatment apparatus is introduced into a combustible component combustion apparatus in the next step through a dry distillation gas conduit, and the dry distillation gas is A heat treatment apparatus for burning and removing combustible components contained, wherein the dry distillation gas conduit and the cleaning tool housing pipe are connected to form an annular pipe, and the annular pipe is combustible with a thermal decomposition treatment device. A pipe conveyer, which is arranged between the volatile component combustion device and a cleaning tool for removing deposits on the pipe wall in the cleaning tool storage pipe, and drives the cleaning tool to adhere to the pipe wall of the carbonization gas conduit. A heat treatment apparatus for an object to be treated, which removes and cleans the solid matter. 4. The pipe conveyor is characterized in that an endless flexible index body is disposed in the pipe conveyor, and the flexible index body is provided with at least one cleaning tool for removing deposits on inner wall of conduit. The heat treatment apparatus for the object to be treated according to claim 3. 5. The heat treatment apparatus for the object to be treated according to claim 4, wherein only the flexible index body is arranged in the dry distillation gas conduit during the heat treatment operation. 6. The heat treatment apparatus for an object to be treated according to claim 4, wherein the pipe conveyor is arranged so as to be inserted through the combustible component combustion apparatus. 7. The heat treatment of the object to be treated according to claim 4, wherein a forced ventilation means is provided adjacent to the pipe conveyor to force the dry distillation gas into the combustible component combustion device. apparatus.