JP7401919B2 - Low temperature pyrolysis equipment - Google Patents

Description

The present invention relates to a low-temperature pyrolysis device, and more particularly to a low-temperature pyrolysis device that performs low-temperature pyrolysis treatment on waste organic matter without generating dioxins, and carbonizes and turns it into ceramics.

An incinerator (incinerator) is a common device for processing waste organic matter such as food waste and waste plastics. However, it is known that when waste organic matter is incinerated at a temperature of about 400°C to 700°C, highly toxic dioxins are generated. In order to suppress the generation of dioxins, high-temperature combustion treatment at, for example, 800° C. or higher is effective, but there are problems in that the cost of equipment is enormous and it is difficult to install it easily.

In response to such problems, Patent Document 1 discloses a low-temperature thermal decomposition method that does not generate dioxins. The low-temperature pyrolysis apparatus disclosed in Patent Document 1 will be explained using FIGS. 16 and 17. FIG. 16 is a side view schematically showing the low-temperature pyrolysis apparatus disclosed in Patent Document 1, and FIG. 17 is a front view thereof.

The low-temperature pyrolysis method using the low-temperature pyrolysis apparatus 50 shown in FIGS. 16 and 17 includes a firing process in which a spark is introduced into the processing furnace 60 into which waste organic matter has been introduced, and an air flow in the magnetization direction of the fluid magnet generator 61. The process includes a magnetization process in which the air is magnetized by passing through it, a supply process in which the magnetized air is supplied into the processing furnace 60, and a discharge process in which exhaust gas generated by the heat treatment is released to the outside.

Specifically, first, with the control valve of the box body part 64 closed, the opening/closing mechanism 66 of the lid part 65 is operated to open the lid part 65. Then, the waste organic matter is introduced into the processing furnace 60 through the opened input port 67, and the opening/closing mechanism 66 is operated again to close the lid.
Next, the process moves to pasteurization. Here, an opening 70 provided in the container 68 is opened, and ignited smoldering material (not shown) is charged into the processing furnace 60 as a spark.

Then, the waste organic matter is ignited based on the spark, and when the fire has spread to some extent in the area AR, the opening 70 is closed and the process moves to the magnetization process and the supply process.
At this time, the waste organic matter is in a smoked state, and an upward airflow is generated inside the processing furnace 60 from the bottom 71. Here, a control valve (not shown) of the box part 64 is opened to a predetermined amount to introduce air into the box part 64 via an introduction pipe (not shown).

The air introduced into the box body part 64 flows into each pipe part (not shown) of the fluid magnet generator 61. Then, when the air passes through a magnet section (not shown), the air is magnetized (and negatively ionized) by lines of magnetic force generated from the pair of magnets (magnetization step). The magnetized air is continuously drawn into the processing furnace 60 via the plurality of fluid supply pipe sections 63 (supply step).

At this time, inside the processing furnace 60, the air sent out from the fluid supply pipe section 63 forms a clockwise vortex centered on the region AR when viewed from vertically above. This promotes heat treatment of the waste organic matter, progresses carbonization and ceramicization in the smoked state, and ends the treatment.

Patent No. 4486671

By the way, in the low-temperature pyrolysis apparatus 50 shown in Patent Document 1, waste organic matter is charged into the processing furnace 60, ignited, and heat-treated at a predetermined temperature. In this case, air tends to penetrate between the waste organic materials, increasing the processing temperature.
On the other hand, when waste organic matter has a large bulk density, it is difficult for air to penetrate between the waste organic matter, and the processing temperature becomes low.

As a result, depending on the waste organic matter, an appropriate treatment temperature cannot be obtained, and the waste organic matter cannot be carbonized or ceramicized, or dioxins are generated.
Another problem was that the entire waste organic matter could not be uniformly heat-treated, and a portion of it could not be carbonized or ceramicized.

The present inventors conducted intensive research on a method of controlling the heat treatment temperature to an appropriate temperature in order to heat-treat waste organic matter and efficiently carbonize and ceramicize all the waste organic matter. Then, by installing a weight to hold down the raw material and an arm to support it, the waste organic matter is held down at a predetermined pressure or released, and furthermore, by controlling the amount of oxygen sent into the processing furnace, all It was discovered that waste organic matter could be carbonized and made into ceramics, and the present invention was completed.

The present invention provides a low-temperature pyrolysis device that performs low-temperature pyrolysis treatment that does not generate dioxins even when waste organic materials have different bulk densities, and can uniformly heat-treat all waste organic materials to carbonize and turn them into ceramics. The purpose is to

The low-temperature pyrolysis apparatus according to the present invention, which has been made to solve the above problems, includes a processing furnace for processing waste organic matter, and a rotary shaft that is attached to a rotating shaft through a support arm in the processing furnace to hold down the waste organic matter. A weight, a weight drive cylinder connected to the rotating shaft, a control unit that controls driving of the weight drive cylinder, and a temperature sensor that detects the temperature inside the processing furnace, and the control unit includes the When the temperature detected by the temperature sensor is lower than a preset temperature range, the weight is raised by the weight driving cylinder to reduce or release the pressure, and the temperature detected by the temperature sensor is lower than the preset temperature range. If the temperature is higher than the range, the weight is lowered by the weight drive cylinder to increase the pressure, and the operation of the weight drive cylinder is controlled according to the temperature detected by the temperature sensor to reduce the compression force of the waste organic matter by the weight. It is characterized by being variable.

The processing furnace includes an oxygen supply nozzle that is provided in the processing furnace and controls the supply of oxygen into the processing furnace using a regulating valve, and the control section controls the regulating valve according to the temperature detected by the temperature sensor. It is desirable to control and vary the amount of oxygen supplied into the processing furnace by the oxygen supply nozzle.
Further, when the temperature detected by the temperature sensor is lower than a preset temperature range, the control unit further opens the adjustment valve to increase the amount of oxygen supplied into the processing furnace by the oxygen supply nozzle, When the temperature detected by the temperature sensor is higher than a preset temperature range, it is desirable to further close the regulating valve to reduce or stop the supply of oxygen into the processing furnace by the oxygen supply nozzle.

Further, it is preferable that a pair of double doors be provided at the inlet of the waste organic matter into the processing furnace, and that the pair of doors can be opened and closed independently.
Further, a screw conveyor is provided at the bottom of the processing furnace for transporting the processed waste organic matter out of the furnace, and the screw conveyor runs from one end in the processing furnace to the other end where the discharge port is provided. The processing furnace has an elongated rotating shaft and screw blades formed continuously around the rotating shaft, and the pitch of the screw blades is set closer to one end of the processing furnace than the other end where the discharge port is provided. It is desirable that the end side is formed large.
Further, an air pump that supplies oxygen to the oxygen supply nozzle, a Karman vortex generating sphere that generates a Karman vortex in the oxygen supplied from the air pump, and an annular magnet that allows the Karman vortex to pass through and magnetizes the oxygen. Preferably, magnetized oxygen is supplied into the processing furnace from the oxygen supply nozzle.

According to such a configuration, the control unit constantly detects the temperature inside the processing furnace and controls the supply of oxygen and the pressing down of waste organic matter by weights so that the temperature inside the processing furnace becomes the appropriate processing temperature. All waste organic matter can be subjected to low-temperature pyrolysis treatment that does not generate dioxins, and can be uniformly heat-treated to carbonize and turn it into ceramics.
In addition, by providing a pair of double-folding doors at the inlet for introducing waste organic matter into the processing furnace, each of which can be opened and closed independently, it is possible to change the storage state of waste organic matter in the furnace. This allows for uniform heat treatment and easy discharge of heat-treated products.
In addition, the pitch of the screw blades in the screw conveyor is formed so that it increases toward the discharge direction, so waste organic matter (after heat treatment) does not get clogged between the screw blades and is transferred to the furnace for heat treatment. It can be efficiently discharged without leaving any residue behind.

According to the present invention, a low-temperature pyrolysis device is capable of performing low-temperature pyrolysis treatment that does not generate dioxins even when waste organic materials have different bulk densities, and is capable of uniformly heat-treating all waste organic materials to carbonize and turn them into ceramics. can be provided.

FIG. 1 is a plan view of a low-temperature pyrolysis apparatus according to the present invention. FIG. 2 is a side view of the low temperature pyrolysis apparatus according to the present invention. FIG. 3 is a front view of the low temperature pyrolysis apparatus according to the present invention. FIG. 4 is a sectional view of the low-temperature pyrolysis apparatus according to the present invention viewed from the front. FIG. 5 is a cross-sectional view of the low-temperature pyrolysis apparatus according to the present invention in a state different from that shown in FIG. 4 when viewed from the front. FIG. 6 is a sectional view of the low-temperature pyrolysis apparatus according to the present invention in a state different from that shown in FIGS. 4 and 5 when viewed from the front. FIG. 7 is a sectional view taken along the line AA in FIG. 3. FIG. 8 is a cross-sectional view of FIG. 2. FIG. 9 is a sectional view taken along the line BB in FIG. FIG. 10 is a cross-sectional view and a block diagram showing the configuration of a magnetized oxygen nozzle included in a low-temperature pyrolysis apparatus according to the present invention. FIG. 11 is an operation flow diagram of the low temperature pyrolysis apparatus according to the present invention. FIG. 12 is a sectional view showing the state transition of the low temperature pyrolysis apparatus according to the present invention. FIG. 13 is a sectional view showing another state transition of the low temperature pyrolysis apparatus according to the present invention. FIG. 14 is a sectional view showing another state transition of the low temperature pyrolysis apparatus according to the present invention. FIG. 15 is a sectional view showing another state transition of the low temperature pyrolysis apparatus according to the present invention. FIG. 16 is a side view schematically showing a conventional low-temperature pyrolysis apparatus. FIG. 17 is a front view schematically showing a conventional low-temperature pyrolysis apparatus.

Hereinafter, the low temperature pyrolysis apparatus according to the present invention will be explained.
The low-temperature pyrolysis device according to the present invention dry-decomposes waste organic matter such as general waste and industrial waste in the presence of a minimum amount of oxygen (air), and turns it into ash in a steam-burning state without emitting flames. It is.
1 is a plan view of the low temperature pyrolysis apparatus according to the present invention, FIG. 2 is a side view of the low temperature pyrolysis apparatus of FIG. 1, and FIG. 3 is a front view of the low temperature pyrolysis apparatus of FIG. 1. be.

This low-temperature pyrolysis apparatus 100 includes two openable and closable input ports 2 on the upper surface side of a container 1 (container case). Inside the container 1, a processing furnace 11 having a bottom surface with a V-shaped cross section is provided as shown in FIG. As shown in FIG. 3, the inside of the processing furnace 11 is divided into two by a separation wall 5 provided at the center, and the two input ports 2 are connected to each space of the divided processing furnace 11 (processing furnace 11A). , 11B) are provided for inputting waste organic matter.
Furthermore, a gas purifier 3 is attached to the back side of the container 1 to purify the air containing harmful substances such as dioxins generated after the heat treatment. This gas purifier 3 takes in the treated air from the treatment furnace 11 and discharges it into the atmosphere after the purification process, and can adopt a well-known configuration.

In addition, as shown in FIG. 9 (cross-sectional view taken along line B-B in FIG. 3), a large number of magnetized oxygen nozzles 12 (oxygen supply nozzles) are provided in a predetermined direction so as to protrude from the V-shaped bottom surface 22. It is being Specifically, as shown in FIG. 2, these magnetized oxygen nozzles 12 are configured in three stages from the bottom to the top of the V-shaped bottom surface 22, with the first stage at the bottom and the second stage above it. The tips of the eye nozzles 12A and 12B are directed downward along the slope. The third and uppermost nozzle 12C is arranged horizontally, and its tip is directed toward the center of the processing furnace 11.

Further, as shown in FIG. 2, the third stage magnetized oxygen nozzles 12C, which are arranged in pairs on both side slopes of the V-shape, are arranged along the lateral direction of the processing furnace 11 in a plan view, as shown in FIG. There is. Further, as shown in FIG. 9, the first and second magnetized oxygen nozzles 12A and 12B are inclined at a predetermined angle from the short side direction of the processing furnace 11 in a plan view of the processing furnace 11, and are arranged on both sides of the V-shape. The jetting directions of the nozzles arranged on the slope face each other in plan view. Thereby, the oxygen supplied into the processing furnace 11 can be circulated in a spiral shape.

As shown in FIG. 10, the magnetized oxygen nozzle 12 is connected to an air pump 31 for feeding oxygen into the nozzle, a solenoid valve 32 for adjusting the flow rate, and a flow meter 33 for detecting the flow rate.
Each magnetized oxygen nozzle 12 is provided with a plurality of (two in the figure) oxygen magnetization devices 34 along the direction in which oxygen flows. The oxygen magnetization device 34 includes a plurality of (six in the figure) alternately provided Karman vortex generating spheres 36 for generating Karman vortices and annular magnets 35 for magnetizing oxygen. In this magnetized oxygen device 34, when oxygen that has passed through the flow meter 33 is supplied, a Karman vortex is generated by the Karman vortex generating sphere 36, and when it passes through the annular magnet 35, the oxygen is magnetized. The configuration is as follows.

Furthermore, an air compressor (not shown) is provided outside the container 1 to supply compressed air to the door opening/closing cylinder 7 shown in FIG. 3 and the like. The door opening/closing cylinder 7 is used to open/close a part of the door provided at the input port. Specifically, as shown in FIG. 3, the inlet 2 is covered with a double-layered lid. That is, it is composed of an outer door 4 and inner doors 6a and 6b which are arranged directly below the outer door and are opened and closed by the drive of a door opening/closing cylinder 7. The outer door 4 is configured to be opened and closed manually.

The inner doors 6a and 6b temporarily receive the input waste organic matter, and when opened by the drive of the door opening/closing cylinder 7, the waste organic matter falls into the processing furnace 11. That is, as shown in FIG. 3, the inner doors 6a and 6b are double-opening type doors, and from the horizontal closed state, they are rotated downward by the drive of the door opening/closing cylinder 7 to the open state, and the waste organic matter falls out. It is supposed to be done.

The door opening/closing cylinder 7 has its lower end installed on the outer surface of the container 1, and the tip of its cylinder rod fixed to the end of a rotating shaft 8 extending along the long sides of the inner doors 6a, 6b. It is pivotally attached to the link plate 9. Thereby, the inner doors 6a, 6b are opened and closed by rotating the link plate 9 and the rotating shaft 8 together as the cylinder rod expands and contracts.

In the case of such a double-lid structure, first, with the inner doors 6a and 6b closed, the outer door 4 is opened manually, and the waste organic matter is introduced and dropped onto the closed inner doors 6a and 6b. Then, by manually closing the outer door 4 and driving the door opening/closing cylinder 7 to open the inner doors 6a and 6b, the waste organic matter is allowed to fall into the processing furnace 11 by its own weight. In this way, by not dropping the waste organic matter directly into the processing furnace 11, but once catching it with the lower inner doors 6a and 6b, when introducing the waste organic matter, the flow of outside air into the processing furnace 11 is suppressed, and the processing Steam in the furnace 11 can be prevented from escaping.

Further, as shown in FIG. 3, a door opening/closing cylinder 7 is provided for each of the inner doors 6a, 6b forming a pair of double-folding doors. Therefore, the opening and closing operations of each of the pair of inner doors 6a and 6b can be independently controlled.
Specifically, from the state where the waste organic matter is placed on the inner door 6, for example, if only the inner door 6a is opened on the processing furnace 11A side as shown in FIG. The waste organic matter W is unevenly stored in the waste organic matter W.

Next, the pair of inner doors 6 are closed, and when the waste organic material is placed on the inner door 6, only the inner door 6b is opened on the processing furnace 11A side as shown in FIG. New waste organic matter W is stored unevenly on the other side.
Next, the pair of inner doors 6 are closed, and when the inner doors 6a and 6b are opened on the processing furnace 11A side as shown in FIG. waste organic matter W is stored therein.
As a result, in the processing furnace 11A, the waste organic matter W is accommodated at approximately the same height, and the magnetized oxygen supplied from the magnetized oxygen nozzle 12 uniformly reaches the waste organic matter W, making it easy to perform uniform heat treatment. . Moreover, it becomes easy to discharge the heat-treated material.

As shown in FIGS. 4 to 6, if the pair of inner doors 6a and 6b are always opened from the state where waste organic matter is placed on the inner door 6 on the processing furnace 11B side, the processing furnace 11B A mountain of waste organic matter W will be stored in the center of the area. In this case, the magnetized oxygen supplied from the magnetized oxygen nozzle 12 does not uniformly reach the waste organic matter W, making it difficult to perform uniform heat treatment. Moreover, it becomes difficult to discharge the heat-treated products.

In addition, in the processing furnaces 11A and 11B, as shown in FIG. 7 (cross-sectional view taken along the line A-A in FIG. 3) and FIG. 8 (cross-sectional view shown in FIG. 2), there is a A pair of front and rear weights 18 (and support arms 19) are respectively provided for applying pressure. Each weight 18 is made of, for example, an 80 kg iron round bar at the tip, and is attached to the rotating shaft 20 via a plurality of support arms 19 . A rotating shaft 20 provided in the processing furnace 11 is supported by bearings provided on both side walls of the container 1 . A pair of weight drive cylinders 17 are provided on the outside of the housing 1 where one end of the rotation shaft 20 is arranged, and the tips of the cylinder rods are connected to a link plate fixed to the rotation shaft 20 of the weight 18 and the support arm 19. It is pivoted to 21. The weight drive cylinder 17 is driven by compressed air supplied from an air compressor (not shown) provided on the outer wall of the container 1.

The weight 18 is moved up and down by switching the input and output of air to the weight drive cylinder 17. Specifically, after being pulled upward by the action of the weight drive cylinder 17, it is rotated in the holding direction by switching the air supply of the weight drive cylinder 17. Then, together with the support arm 19, the waste organic matter deposited on the V-shaped bottom surface 22 is pressed against the material to be treated using air pressure, and the rate of thermal decomposition is kept constant while changing the pressure.
Note that since the processing furnace 11A and the processing furnace 11B are each provided with a weight drive cylinder 17, each weight 18 and rotating arm 19 can be rotated independently.

Furthermore, a screw conveyor 13 is provided at the bottom of the V-shaped bottom surface 22 of the processing furnace 11 as a discharge means. This screw conveyor 13 consists of a screw conveyor 14 on the processing furnace 11A side and a screw conveyor 15 on the processing furnace 11B side. As shown in FIG. 3, the screw conveyors 14 and 15 are long strips that extend from one end (the center of the processing furnace 11) in the processing furnaces 11A and 11B toward the other end where a discharge port (ash removal port 16) is provided. It consists of rotating shafts 14a, 15a, and screw blades 14b, 15b continuously formed around the rotating shafts 14a, 15a. The rotating shafts 14a and 15a are arranged on the same axis and are rotatably provided around the shaft by a motor (not shown). Moreover, the directions of the screw blades 14b and 15b are formed in opposite directions, so that the direction of discharge by the screw conveyor 14 and the direction of conveyance by the screw conveyor 15 are opposite to each other outward. Therefore, ash removal ports 16 are provided on both sides (discharge ports) of the container 1, respectively.

In addition, for example, as shown in FIG. 3, in each screw conveyor 14, 15, the pitch of the screw blades 14b, 15b is set at the discharge port from the one end side (center side in the processing furnace 11) of the processing furnaces 11A, 11B. The other end side where the screw is provided is formed larger (that is, the pitch of the screw is formed so as to gradually increase from the center side in the processing furnace 11 toward the discharge direction side).
Thereby, the heat-treated material can be efficiently discharged without clogging the screw near the exit (on the side of the ash outlet 16).

Furthermore, the low-temperature pyrolysis apparatus 100 according to the present invention includes a control section 30 (computer) as shown in FIG. 1, and the processing temperature in the processing furnace 11 is automatically controlled by the control section 30. In order to perform this control, an upper temperature sensor 10a and a lower temperature sensor 10b are provided in the processing furnace 11, as shown in FIG.
The data on the temperature inside the furnace detected by the temperature sensors 10a and 10b is used in the control section 30 to determine whether the temperature is within a predetermined range.According to the result, the control section 30 controls the magnetized oxygen nozzle 12. It controls the operation of the electromagnetic valve 32 for supplying oxygen and the weight drive cylinder 17 for raising or lowering the weight 18 and support arm 19 (the operation of the air compressor for supplying compressed air to the cylinder).

That is, the temperature sensors 10a and 10b are used to maintain the temperature inside the furnace at a constant temperature, control to prevent flames from emitting, and control to maintain a smoldering state like charcoal. .
For example, if the temperature in the upper part of the furnace detected by the temperature sensor 10a rises above a predetermined value, the air supply from the magnetized oxygen nozzle 12C arranged on the upper side is stopped (from the magnetized oxygen nozzle 12 on the upper side). The air supply is stopped in stages) and the temperature inside the furnace is controlled.
Alternatively, if the temperature at the top rises above a predetermined value, the weight 18 can be used to collect waste organic matter a preset number of times (for example, 3 times for waste plastic, 6 times for wood-based waste, 0 times for paper-based waste, etc.) ) You can also press it down by hitting it from above. By doing so, there will be no gap for air to enter the waste organic matter, and the temperature can be lowered.

As shown in FIG. 2, highly accurate process control is achieved by providing an oxygen concentration meter 40a in the processing furnace 11 and an oxygen concentration meter 40b in the pipeline from the treatment furnace 11 to the gas purifier 3. I can do things.
For example, data on the oxygen concentration in the furnace detected by the oxygen concentration meters 40a and 40b is used in the control section 30 to determine whether the temperature is within a predetermined temperature range, and according to the result, the control section 30 controls the magnetization. It controls the operation of the solenoid valve 32 that supplies oxygen to the oxygen nozzle 12 and the weight drive cylinder 17 that raises or lowers the weight 18 and support arm 19 (the operation of the air solenoid valve that supplies compressed air to the cylinder). Also good.
Specifically, when the oxygen concentration increases, the air supply from the magnetized oxygen nozzle 12 is stopped, the waste organic matter is hit from above with the weight 18, and the gaps (spaces) generated during pyrolysis are hit. It is best to keep it close to waste organic matter. On the other hand, if the oxygen concentration drops, it is preferable to supply air from the magnetized oxygen nozzle 12, raise the weight 18, and release the pressure on the waste organic matter in the weight 18.
Furthermore, temperature sensors 10a and 10b and oxygen concentration meters 40a and 40b are used to maintain the temperature inside the furnace at a constant level and control to prevent flames from emitting. It is more preferable to perform control to maintain the state.

For example, heat treatment on the processing furnace 11A side will be explained using the operation flow of FIG. 11 and FIGS. 12 to 15.
First, charcoal is raised outside the furnace as a ignition source, and then introduced into the furnace through an inlet (not shown) (step S1 in FIG. 11).
Next, the waste organic matter W is charged from the input port 2 onto the ignition source in the processing furnace 11A (step S2 in FIG. 11). Specifically, the outer door 4 is opened manually and the waste organic matter W is thrown onto the closed inner doors 6a and 6b. Next, for example, only the inner door 6a is opened and the waste organic matter W is introduced into the processing furnace 11A. As a result, waste organic matter is stored unevenly on one side of the processing furnace 11A.

Continuously, the inner door 6a is closed, the waste organic matter W is put on the inner doors 6a and 6b, and only the inner door 6b is opened, and the waste organic matter W is put into the processing furnace 11A. As a result, waste organic matter is stored unevenly on the other side of the processing furnace 11A.
Continuously, the inner door 6b is closed, the waste organic matter W is put onto the inner doors 6a and 6b, and the inner doors 6a and 6b are opened and the waste organic matter W is put into the processing furnace 11A. As a result, the waste organic matter is stored in the center of the processing furnace 11A, and the height of the waste organic matter W within the processing furnace 11A is approximately uniform.

Then, the waste organic matter W is flamelessly combusted based on the ignition source, and when the fire has spread to a certain extent, the control unit 30 opens the solenoid valve to introduce magnetized oxygen into the furnace from the magnetized oxygen nozzle 12 and treat it. (Step S3 in FIG. 11).

Further, the control unit 30 drives the weight drive cylinder 17 to pull the weight 18 upward as shown in FIG. Rotate it downward. That is, the weight 18 rotates downward according to the air pressure set by the control unit 30, and pressurizes the waste organic matter W deposited on the V-shaped bottom surface 22 as shown in FIG. 13 (step S4 in FIG. 11). .
As a result, the waste organic matter comes into close contact with each other, and heat conduction between the waste organic matter becomes good, so that the low-temperature pyrolysis treatment process progresses.

Here, in the low-temperature pyrolysis process, if the furnace temperature detected by the temperature sensors 10a and 10b is higher than a predetermined temperature range (step S5 in FIG. 11), the control unit 30 controls the magnetized oxygen nozzle 12 The electromagnetic valve is controlled in the direction of closing to reduce (or stop) the supply amount of magnetizing oxygen, and the air supply to the weight drive cylinder 17 is switched by the electromagnetic valve to lower the weight 18. That is, as shown in FIG. 14, the pressure on the waste organic matter W is increased according to the weight of the weight 18 and the air pressure set by the control unit 30 (step S6 in FIG. 11). The compressive force of the waste organic matter W increases, the waste organic matter becomes more closely attached to each other, and the bulk density increases, so that the smoldering temperature decreases and falls within a predetermined temperature range.

On the other hand, if the temperature detected by the temperature sensors 10a, 10b is lower than the predetermined temperature range (step S5 in FIG. 11), the control unit 30 opens the solenoid valve of the magnetized oxygen nozzle 12 further (or fully opens it). ), the supply amount of magnetizing oxygen is increased, and the air supply to the weight drive cylinder 17 is switched by a solenoid valve to raise the weight 18. That is, as shown in FIG. 15, the weight 18 is pulled up to reduce or release the pressure on the waste organic matter W (step S7 in FIG. 11). As a result, the bulk density of the waste organic matter W becomes smaller, more magnetized oxygen enters the gaps between the waste organic matter, and the smoldering temperature rises to within a predetermined temperature range.

In this way, in the heat treatment process, the control unit 30 automatically controls the furnace temperature to be within a predetermined range, and completes the low-temperature pyrolysis treatment after a preset time has elapsed (steps in FIG. 11). S8).

In this embodiment, the control unit 30 constantly detects the temperature inside the processing furnace 11 and controls the supply of magnetized oxygen and the weight 18 so that the temperature inside the processing furnace 11 becomes the appropriate processing temperature. By variably controlling the pressing down of waste organic matter, all waste organic matter can be subjected to low-temperature pyrolysis treatment that does not generate dioxins, uniformly heat-treated, and efficiently carbonized and turned into ceramics.
In addition, a pair of double-opening inner doors 6a and 6b are provided at the input port 2 through which waste organic matter is introduced into the processing furnace 11, and each can be opened and closed independently. The state can be changed and uniform heat treatment and discharge can be facilitated.
In addition, since the pitch of the screw blades 14b and 15b in the screw conveyors 14 and 15 is formed so as to gradually increase toward the discharge direction (toward the ash removal port 16 side), the waste organic matter after heat treatment ( The heat-treated product can be efficiently discharged without clogging between the screw blades near the outlet (on the side of the ash outlet 16) and without leaving any heat-treated product in the furnace.

In the above embodiment, magnetized oxygen is supplied into the processing furnace 11 by the magnetized oxygen nozzle 12, but the present invention is not limited to this embodiment. Instead, the present invention can also be applied to a configuration in which unmagnetized oxygen is supplied into the processing furnace 11 from an oxygen supply nozzle to perform low-temperature pyrolysis treatment.

1 Container 2 Inlet 3 Gas purifier 4 Outer door 5 Partition wall 6a Inner door (door)
6b Inner door (door)
7 Door opening/closing cylinder 8 Rotating shaft 9 Link plate 10a Temperature sensor 10b Temperature sensor 11 Processing furnace 11A Processing furnace 11B Processing furnace 12 Magnetized oxygen nozzle (oxygen supply nozzle)
13 Screw conveyor (discharge means)
14 Screw conveyor 14a Rotating shaft 14b Screw blade 15 Screw conveyor 15a Rotating shaft 15b Screw blade 16 Ash outlet 17 Weight drive cylinder 18 Weight 19 Support arm 20 Rotating shaft 21 Link plate 22 V-shaped bottom 30 Control part 40a Oxygen concentration meter 100 Low temperature pyrolysis equipment W Waste organic matter

Claims (6)

A treatment furnace for treating waste organic matter, a weight attached to a rotating shaft via a support arm in the treatment furnace to press down the waste organic matter, a weight driving cylinder connected to the rotating shaft, and a weight driving cylinder connected to the rotating shaft. comprising a control unit that controls driving, and a temperature sensor that detects the temperature inside the processing furnace,
The control unit includes:
When the temperature detected by the temperature sensor is lower than a preset temperature range, the weight is raised by the weight drive cylinder to reduce or release the pressure;
When the temperature detected by the temperature sensor is higher than a preset temperature range, the weight is lowered by the weight drive cylinder to increase the pressure;
A low-temperature pyrolysis device characterized in that the operation of the weight drive cylinder is controlled according to the temperature detected by the temperature sensor, and the compression force of the waste organic matter by the weight is varied.. an oxygen supply nozzle that is provided in the processing furnace and controls oxygen supply into the processing furnace by a regulating valve;
The control unit controls the regulating valve according to the temperature detected by the temperature sensor, and varies the amount of oxygen supplied into the processing furnace by the oxygen supply nozzle. Low temperature pyrolysis equipment. The control unit includes:
If the temperature detected by the temperature sensor is lower than a preset temperature range, the regulating valve is further opened to increase the amount of oxygen supplied into the processing furnace by the oxygen supply nozzle,
If the temperature detected by the temperature sensor is higher than a preset temperature range, the regulating valve is further closed to reduce or stop the supply of oxygen into the processing furnace by the oxygen supply nozzle. The low temperature pyrolysis apparatus according to claim 2 . A pair of double doors are provided at the inlet of the waste organic material to the treatment furnace,
The low-temperature pyrolysis apparatus according to any one of claims 1 to 3 , wherein the pair of doors are configured to be able to be opened and closed independently. A screw conveyor is provided at the bottom of the processing furnace for transporting the processed waste organic matter to the outside of the furnace,
The screw conveyor has an elongated rotating shaft extending from one end in the processing furnace toward the other end provided with the discharge port, and a screw blade continuously formed around the rotating shaft,
The low-temperature processing apparatus according to any one of claims 1 to 4 , wherein the pitch of the screw blades is larger on the other end side where the discharge port is provided than on the one end side of the processing furnace. Pyrolysis equipment. An air pump that supplies oxygen to the oxygen supply nozzle, a Karman vortex generating sphere that generates a Karman vortex in the oxygen supplied from the air pump, and an annular magnet that allows the Karman vortex to pass through and magnetizes the oxygen,
The low-temperature pyrolysis apparatus according to any one of claims 3 to 5, characterized in that magnetized oxygen is supplied into the processing furnace from the oxygen supply nozzle.

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