JP2006343002A - Dry distillation gasification furnace, light metal melting furnace and light metal melting equipment - Google Patents

Abstract

The present invention provides a highly efficient light metal melting facility that uses a recovered aluminum wheel and waste tires effectively as resources when melting light metals and uses waste tires as a heat source without using fossil fuel as much as possible.
An aluminum alloy melting facility 1 is provided with a carbonization gasification furnace 3 and an aluminum alloy melting furnace 2 for carbonizing a tire and generating a carbonization gas, throwing a waste tire into the carbonization gasification furnace, and providing sufficient air Baking without generating air, blowing air in the middle of the dry distillation gas flue 12 for sending the dry distillation gas to the aluminum alloy melting furnace, mixing the dry distillation gas and air in the combustion preparatory chamber 22, the melting furnace body Burn in 21 of them. The flame half-burning zone was placed in the combustion preparatory chamber, and the combustion zone was placed in the melting furnace body.
[Selection] Figure 1

Description

  The present invention collects the aluminum wheel and the tire together, takes out the dry distillation gas from the waste tire in the dry distillation gasification furnace, burns the dry distillation gas in a light metal melting furnace, and dissolves the recovered aluminum wheel, The present invention relates to a light metal melting facility for newly producing aluminum alloy products such as aluminum wheels.

Conventionally, light alloy melting furnaces such as aluminum melting furnaces use LPG or heavy oil as fuel, and use fossil fuels as little as possible from the viewpoint of reducing fuel consumption associated with soaring fossil fuels and preventing depletion of fossil fuels. A light metal melting facility was desired.
In addition, aluminum wheels were used as a new aluminum alloy material, but waste tires are often incinerated, and the heat generated when burning is used as a heat source for boilers, etc. It was never used as a heat source for the furnace.
For this reason, when aluminum wheels and tires are collected as waste products, conventionally, the collected aluminum wheels must be transported to an aluminum alloy casting factory, and the waste tires must be transported to an incinerator or boiler to process waste. The labor and cost of separately transporting the collected aluminum wheels and waste tires were excessive.
Further, there has been an invention in which combustible gas generated when a waste tire is burned is burned by a smoke-extinguishing burner and high-temperature combustion gas is sent to a metal melting furnace such as aluminum as a heat source (see, for example, Patent Document 1) However, since the invention concerned does not burn the combustible gas in the refractory passage and burns it in the metal melting furnace, most of the combustion energy, which is mostly radiant heat, is not used as a heat source for the metal melting furnace. was there.
Japanese Patent No. 3333462

The tire combustion test results are briefly described below. When a rubber tire or a rubber tire chip (hereinafter simply referred to as a “tire”) is placed in a dry distillation gasification furnace and baked without sufficient air, dry distillation gas is suddenly generated at a temperature of 180 to 220 degrees Celsius and the maximum value is reached. After reaching the value, the amount of carbonized gas is gradually reduced.
Depending on the size of the tire, the time from the sudden generation of the dry distillation gas to the decrease in the generation amount is 2 to 5 minutes in the case of a tire chip of (50-100) mm × 100 mm × (5-10) mm. For this reason, a method of putting tires into a dry distillation gas furnace batchwise every 3 to 6 minutes, including the time from the start of the introduction of tires until the start of generation of dry distillation gases, is effective.
Moreover, it was found from the results of the test using the prototype combustion experimental device that the amount of generated dry distillation gas changes by changing the amount of air sent to the dry distillation gasification furnace, and the temperature of the light metal melting furnace can be controlled. Furthermore, it was found that the response speed is fast in a few minutes, and the temperature of the light metal melting furnace can be controlled within a range of 50 degrees Celsius with respect to the set temperature.

The present invention has been made in order to meet the above-mentioned demands and eliminate the drawbacks of the prior art. The object of the present invention is to reduce fossil fuel as much as possible from the viewpoint of reducing fuel consumption and preventing the depletion of fossil fuel. The object is to provide a light metal melting facility that is not used.
Another object of the present invention is to produce a carbonized gas from waste tires as a raw material, and to make a light metal melting facility for melting aluminum wheels recovered in a light metal melting furnace using this as a fuel. It is to effectively use waste materials as resources while reducing the labor and cost of transporting the waste separately.
Another object of the invention is to burn the combustible gas generated when burning the waste tire with a smoke-extinguishing burner and to send the high-temperature combustion gas to a metal melting furnace such as aluminum as a heat source. Eliminate the problem that most of the combustion energy that is used is not used as a heat source for metal melting furnaces, burn dry distillation gas in light metal melting furnaces, and use the generated radiant heat to dissolve light metals such as aluminum alloys and magnesium alloys It is in.

  The present invention introduces a tire into a dry distillation gas furnace, burns it without giving enough air to generate dry distillation gas, and dissolves the light metal in the middle of the dry distillation gas flue to send the dry distillation gas to the light metal melting furnace or in the combustion prechamber. The most important thing is to make a light metal melting facility that blows air toward the melting furnace body of the furnace, mixes dry distillation gas and air in the pre-combustion chamber to a semi-combustion state, and burns in a light metal melting furnace in earnest. Features.

According to the present invention, dry distillation gas is produced using waste tires as raw materials, and dry distillation gas is used as fuel. Therefore, it is possible to provide a light metal melting facility that uses as little fossil fuel as possible.
In addition, according to the present invention, when the aluminum wheel and the tire are collected, the labor and cost of separately conveying the collected aluminum wheel and the waste tire can be reduced, and furthermore, all the waste material can be effectively used as resources.
Further, according to the present invention, since the carbonization gas is combusted in a light metal melting furnace, the generated radiant heat can be effectively used for dissolving light metals such as aluminum.

The invention of claim 1 includes a dry distillation gasification furnace for carbonizing a tire to generate dry distillation gas, and a light alloy melting furnace for melting a light alloy material such as an aluminum alloy, and the dry distillation gasification furnace and the The light alloy melting furnace is connected with a dry distillation gas flue, an air nozzle is provided toward the melting furnace main body of the light alloy melting furnace, the air blown out from the air nozzle is mixed with the dry distillation gas, and the light alloy melting furnace The light alloy melting equipment is configured to burn dry distillation gas in the melting furnace body.
The dry distillation gasification furnace, light alloy melting furnace, and dry distillation gas flue are all heat resistant to withstand high temperature gases. In the dry distillation gasification furnace, there are methods such as igniting and burning soot to ignite the tires first, but a configuration in which an ignition burner is attached is preferable.
The air nozzle is installed in the middle of the dry distillation gas flue or in the combustion preparatory chamber, and is attached so as to blow air directly toward the combustion preparatory chamber or the melting furnace body. It is set as the structure which mixes dry distillation gas and the blown-in air in a combustion preliminary chamber or a melting furnace main body, and burns in a melting furnace main body.
Moreover, it is set as the structure which provides an air blowing pipe in the wall of the lower part of a dry distillation gasification furnace, and blows off air from several places to a dry distillation gas furnace. And in order to generate dry distillation gas efficiently, the amount of air supplied to a dry distillation gasification furnace is restrict | squeezed, and it adjusts so that the combustion temperature of a tire may be 180-220 degree | times. This is because if a large amount of air is blown in, the combustion temperature of the tire rises and the generation of dry distillation gas decreases.
It is preferable to maintain the furnace temperature at 800 to 850 degrees Celsius by burning dry distillation gas in a light alloy melting furnace. This is because such a temperature is suitable for efficiently dissolving a light metal typified by an aluminum alloy.
According to a second aspect of the present invention, in the light alloy melting facility according to the first aspect, air is blown from a lower portion of the dry distillation gasification furnace, a temperature sensor is provided in the light alloy melting furnace, and the temperature in the light alloy melting furnace is set. When the temperature exceeds a predetermined temperature A of about 850 degrees Celsius, the amount of air blown from the bottom of the dry distillation gasification furnace is reduced, and the temperature in the light alloy melting furnace is a predetermined temperature B of about 800 degrees Celsius. The light alloy melting equipment is configured to increase the amount of air blown from the lower part of the dry distillation gasification furnace when it becomes less than the above.
If the amount of air blown from the bottom of the dry distillation gasification furnace is slightly reduced, the amount of dry distillation gas is reduced a little, the combustion energy of dry distillation gas in the light metal melting furnace is reduced, and the effect of lowering the temperature in the light metal melting furnace is obtained. Because.
Also, if the amount of air blown from the bottom of the dry distillation gasifier is slightly increased, the amount of dry distillation gas is increased slightly, the combustion energy of the dry distillation gas in the light metal melting furnace is increased, and the temperature in the light metal melting furnace is increased. It is because the effect to make is obtained.
In addition, by burning dry distillation gas in a light alloy melting furnace, maintaining the furnace temperature at 800 to 850 degrees Celsius is suitable for efficiently dissolving light metals typified by aluminum alloys. is there.

The invention of claim 3 is the light alloy melting facility according to claim 1 or 2, wherein the light alloy melting is configured such that the tire is fed into the dry distillation gasification furnace in a batch mode at predetermined time intervals. Equipment.
Since the time from the start of tire introduction to the rapid generation of dry distillation gas and the subsequent reduction of the generation amount is 3 to 6 minutes, the predetermined time is 3 to 6 minutes according to the tire size and the structure of the dry distillation furnace. It is preferable to set an arbitrary time between.
The invention of claim 4 is a light alloy melting facility according to claim 1 or claim 2, wherein the introduction of a tire into a dry distillation gasification furnace is a batch system, and an oxygen concentration sensor is provided in the dry distillation gas path, The light alloy melting equipment is configured such that when the oxygen concentration of the dry distillation gas flowing in the dry distillation gas passage exceeds a predetermined concentration, a batch amount of tire is charged into the dry distillation gasification furnace.
The time when the amount of generated carbon dioxide increases and then decreases is judged by the oxygen concentration of the carbonized gas flowing in the carbonized gas path, and the oxygen concentration of the carbonized gas exceeds the predetermined concentration (any value of 5 to 8%). In this case, a tire for newly carbonizing is introduced.
The invention of claim 5 comprises a gasification section that generates dry distillation gas, a hopper section where charcoal and ash of a tire fall, a rooster that separates the gasification section and the hopper section and that can be opened and closed. The dry distillation gasification furnace includes a dry distillation gasification furnace configured to blow air from a lower part of the gasification part and a hopper part corresponding to a lower part of the dry distillation gasification furnace.
The dry distillation gasification furnace has a sealed heat-resistant structure, but the gasification section is provided with an opening at the top that matches the sealed tire charging device and an opening that matches the dry distillation gas flue, and at the bottom of the hopper is a sealed type. Provide a hopper opening to match the residue discharge device. Moreover, it is set as the structure which arrange | positions several air blowing pipes in the lower part of a gasification part, and the outer periphery of a hopper part, and blows air in the dry distillation gasification furnace from the several blower outlet of each air blowing pipe.
As for the configuration of the rooster, the rooster is composed of a plurality of blocks and opened and closed by swinging each block, or the rooster is composed of two lattice plates and opened and closed by sliding the lattice plate Etc. are preferable.
It is preferable that the rooster is provided with gaps and holes uniformly so that charcoal carbonized by the tire does not fall. This is because the air blown into the hopper part passes through the rooster and flows as evenly as possible to the gasification part.

A sixth aspect of the present invention is the dry distillation gasification furnace according to the fifth aspect, wherein the input chamber A and the input chamber B are provided in two stages, and the gate A is connected to the input chamber A in the input chamber. A dry distillation gasification furnace having a charging device in which gates B are respectively attached to B and the gates A and B are alternately opened and closed at a predetermined timing.
When the tires are charged from the charging chamber A to the charging chamber B, and the tires are charged from the charging chamber B to the gasification unit, when the tires are charged from the charging chamber B to the gasification unit, the gate A of the charging chamber A Is closed, and when the tire is charged from the charging chamber A to the charging chamber B, the gate B of the charging chamber B is closed so that the tire is charged while maintaining the hermeticity of the dry distillation gasification furnace. It is a thing.
After the tire is put into the dry distillation gasification furnace, the time from the rapid generation of dry distillation gas to the decrease in the generation amount is 3 to 6 minutes. For this reason, the method of setting a predetermined | prescribed timing in any time for 3 to 6 minutes and throwing a tire into a gasification part every 3 to 6 minutes is preferable.
Moreover, the time when the generation amount of the dry distillation gas increases once and then decreases is determined by the oxygen concentration of the dry distillation gas flowing in the dry distillation gas passage, and the oxygen concentration of the dry distillation gas is a predetermined concentration (an arbitrary value of 5 to 8%). A configuration in which the tire is thrown at a predetermined timing when it exceeds the upper limit is also preferable.
According to a seventh aspect of the present invention, a residue discharging apparatus is provided in the dry distillation gasification furnace according to any one of the fifth or sixth aspect, and the residue discharging apparatus includes a slide block, a drive unit for reciprocating the slide block, a drop The discharge block A of the slide block and the drop path A coincide with each other at the return end position of the slide block, and the discharge chamber B and the hopper opening coincide with each other. At the forward end position of the block, the discharge chamber B and the drop path B are matched, and the discharge chamber A and the hopper opening are matched, and a conveyor is provided below the drop path A and the drop path B. It is set as the dry distillation gasification furnace which is a residue discharge apparatus which has this.
At the rear end position of the slide block, the discharge chamber A is aligned with the drop path A, the tire charcoal and ash mixture in the discharge chamber A is dropped onto the conveyor, and at the same time, the discharge chamber B is aligned with the hopper opening. Accept a mixture of tire charcoal and ash underneath.
Further, the slide block is moved to the forward end position, the discharge chamber B is matched with the drop path B, and the mixture of the charcoal and ash of the tire contained in the discharge chamber B is dropped onto the conveyor, and at the same time, the discharge chamber A is matched with the hopper opening. Accept the tire charcoal and ash mixture under the hopper.
As described above, the slide block is moved to the reciprocating end, and the mixture of the charcoal and ash of the tire is discharged while maintaining the hermeticity of the dry distillation gasification furnace. The drive unit that moves the slide block preferably has a configuration in which the rotational power of the motor is transmitted to a chain or a wire and pulled, or a configuration in which a cylinder such as an air cylinder, a hydraulic cylinder, or an electric cylinder is used.

The invention of claim 8 is a light alloy melting furnace having a melting furnace main body for melting a light alloy and a tap holder for discharging molten metal, and a light metal melting furnace having a combustion prechamber and an auxiliary burner.
Combustion of dry distillation gas generates a flame, but the flame consists of a semi-combustion zone where the combustion reaction hardly occurs and a combustion zone where the combustion reaction occurs actively, and most of the combustion energy of the flame is in the combustion zone. appear. Therefore, a combustion preliminary chamber for forming a semi-combustion zone is provided in order to form a combustion zone of a flame generating most of the combustion energy in the melting furnace body.
The auxiliary burner is assumed to be fueled with heavy oil or LPG, and is arranged so as to cross at an angle of about 30 degrees with respect to the flame of the dry distillation gas. The auxiliary burner ignites the dry distillation gas and burns it until the dry distillation flame becomes stable. Further, after the combustion of the dry distillation gas is started, the auxiliary burner is burned when the temperature in the light alloy melting furnace is lower than a predetermined temperature B (800 degrees Celsius). This is because maintaining the temperature in the light alloy melting furnace at 800 to 850 degrees Celsius is suitable for efficiently dissolving light metals typified by aluminum alloys.
A ninth aspect of the present invention is the light alloy melting furnace according to the eighth aspect, wherein the charging chamber A and the charging chamber B are provided in two stages, and the gate A is connected to the charging chamber A in the charging chamber. A light alloy melting furnace having a charging device in which gates B are respectively attached to B and the gates A and B are alternately opened and closed.
When a material such as an aluminum wheel is input from the input chamber A to the input chamber B, and further, the material is input from the input chamber B to the light metal melting furnace. Close the gate A of the A, and close the gate B of the charging chamber B when charging the material from the charging chamber A to the charging chamber B, and supply the material while maintaining the tightness of the light metal melting furnace. It is the structure which does.

A first embodiment of the present invention will be described below with reference to FIG. The invention of Example 1 is an aluminum alloy melting facility 1 comprising a dry distillation gasification furnace 3, an aluminum alloy melting furnace 2, and a dry distillation gas flue 12 connecting the dry distillation gasification furnace 3 and the aluminum alloy melting furnace 2. is there.
The dry distillation gasification furnace 3 has a sealed heat-resistant structure, and includes a room constituted by a gasification part 31 and a hopper part 34 and a rooster 9 that separates the gasification part 31 and the hopper part 34. The lower part of the gasification part 31 has an ignition burner 33, and a plurality of air blowing pipes 35 are provided in the lower part of the gasification part 31 and the wall of the hopper part 34. Air was blown into the dry distillation gasification furnace 3.
An opening is provided in the ceiling of the gasification unit 31, and a charging device 4 having a charging chamber A43 having a gate A45 and a charging chamber B44 having a gate B46 is provided in two stages, and a gate A45 and a gate are set at predetermined intervals by a timer. B46 was opened and closed. Further, a chute 42 is attached to the upper part of the charging chamber A43, and tire chips are thrown into the chute 42 by the bucket conveyor 41.
The rooster 9 is composed of a plurality of blocks 91 arranged with gaps, and each block 91 has a configuration in which two members having a substantially right-angled triangle in cross-section are opposed to each other with their hypotenuses facing each other, and a gap is provided. As shown by the alternate long and short dash line in FIG. 1, the members having a substantially right-angled triangle in the sectional view were opened and closed by swinging up and down.
The gap provided in the rooster should be such that the carbonized charcoal does not fall, and is preferably provided uniformly. This is because the air blown into the hopper part passes through the rooster and flows as evenly as possible to the gasification part.
Below the hopper 34, there are a slide block 71 having a discharge chamber A71a and a discharge chamber B71b, a pneumatic cylinder 74 for reciprocating the block 71, a drop path A73a, a drop path B73b, a drop path A73a, and a drop path B73b. A residual discharge device 7 including a screw conveyor 72 attached at a position to join is provided.
Then, the discharge chamber A71a and the drop path A73a are matched at the return end position of the slide block 71, and the discharge port B71b and the hopper opening 34a are matched. Further, at the forward end position of the slide block 71, the discharge port B71b and the drop path B73b are matched, and the discharge port A71a and the hopper opening 34a are matched.

An opening was provided in the upper part of the gasification section 31 of the reflux gasification furnace 3, and the dry distillation gas flue 12 was attached. The reflux gas flue 12 was a cylinder with a sealed heat-resistant structure, and the air nozzle 11 was attached to the melting furnace main body 21 in the vicinity of the aluminum alloy melting furnace 2 and coupled to the duct piping 62 of the blower 6.
The blower 6 is a device that blows the air blown by the blower 61 to the air blowing pipes 35 and the air nozzles 11 through the duct pipes 62. A damper was attached.
The dry distillation gas flue 12, the air nozzle 11, the combustion preparatory chamber 22 and the auxiliary burner 26 of the aluminum alloy melting furnace 2 are all arranged horizontally, and the auxiliary burner 26 uses LPG as fuel and has an angle of 30 degrees with respect to the preparatory combustion chamber 22. Attach to cross.
The combustion prechamber 22 has a cylindrical shape that expands in accordance with the expansion of the semi-combustion zone of the dry distillation gas, so that the semi-combustion zone of the flame of the dry distillation gas fits in the combustion prechamber 22.
The aluminum alloy melting furnace 2 has a sealed heat-resistant structure, and includes a melting furnace body 21, the above-described combustion preliminary chamber 22, a tap holder 25 for discharging molten metal, and an exhaust gas outlet 24.
The melting furnace main body 21 is provided with a temperature sensor (not shown), the melting furnace main body 21 is provided with an opening in the ceiling, and a charging chamber A51 having a gate A53 and a charging chamber B52 having a gate B54 are provided in two stages. 5 was attached.
Further, the exhaust gas port 24 is configured to be connected to an exhaust gas treatment device (not shown) through a duct pipe (not shown).

The invention of Embodiment 1 is configured as described above, and the operation thereof will be described below. In Example 1, tire chips obtained by cutting waste tires into a size of (50 to 100) mm × 100 mm × (5 to 10) mm were loaded on the bucket conveyor 41.
The tire chip raised by the bucket conveyor 41 passes through the chute 42 and enters the input chamber A43. The gate A45 is opened and closed every 3 minutes, and the tire chip falls from the input chamber A43 to the input chamber B44 every three minutes.
Furthermore, the tire chip in the charging chamber B44 falls into the gasification section 31 by opening and closing the gate B46 every 3 minutes. The gate A45 and the gate B46 are not opened at the same time, and one of the gates A45 and B46 is always kept closed, so that the sealing degree of the gasifier 31 is maintained.
In the first embodiment, since the ignition burner 33 is attached, the ignition burner is burned at the beginning of the work to ignite the tire chip. However, when the tire chip is burned, the tire chip fires even if the ignition burner is extinguished. Burn into newly introduced tires. In the gasification unit 31, the tire chip is not sufficiently supplied with air and is in an incineration state of 180 to 220 degrees Celsius and generates dry distillation gas.
In this embodiment, the generation amount of dry distillation gas decreases after 3 minutes from the introduction of the tire chip. However, since a new tire chip is input every 3 minutes, the dry distillation gas can always be generated continuously.
When the tire chip burns, it is carbonized to charcoal, and further becomes ash, but the charcoal and ash are always kept in a layered state on the rooster 9, and a little by opening and closing each block 91 of the rooster 9. Charcoal and ash are dropped onto the hopper part 34 one by one.
A layer of charcoal and ash is also formed in the hopper portion 34, and when the discharge chamber A71a or the discharge chamber B71b of the slide block 71 matches the hopper opening 34a, the volume of the discharge chamber A71a or the discharge chamber B71b is equal to the volume of the hopper portion 34. Charcoal and ash fall. At this time, the discharge chamber A 71a and the discharge chamber B 71b that coincide with the hopper opening 34a are both sealed, and the sealed state of the hopper portion 34 is maintained.
The charcoal and ash in the discharge chamber A71a fall on the dropping path A73a at the return end position of the slide block 71, the charcoal and ash in the discharge chamber B71b fall on the dropping path B73b at the forward end position of the slide block 71, and the screw conveyor 72. It is dropped and collected.

The dry distillation gas generated in the gasification unit 31 of the dry distillation gasification furnace 3 passes through the dry distillation gas flue 12, flows into the combustion preliminary chamber 22, and remains in a semi-combustion state while being mixed with the air flow blown out from the air nozzle 11. It ejects into the melting furnace main body 21 through the chamber 22.
In this embodiment, the auxiliary burner 26 is attached, and the dry distillation gas is ignited by the fire of the auxiliary burner 26 at the beginning of the work. Further, combustion is performed until the combustion of the dry distillation gas is stabilized and the temperature in the melting furnace body 21 reaches 800 degrees Celsius or higher. When the temperature in the melting furnace body 21 becomes less than 800 degrees Celsius, the auxiliary burner is burned again.
The flame of the dry distillation gas is a semi-combustion zone in which the combustion reaction hardly occurs in the combustion preparatory chamber 22, and becomes a combustion zone in which the combustion reaction occurs actively in the melting furnace body 21, and most of the combustion energy of the flame of the dry distillation gas is obtained. Is generated in the melting furnace body 21.
Since the high radiant heat generated by the combustion zone of the dry distillation gas flame is directly absorbed by the aluminum alloy material, the heat energy generated by the dry distillation gas flame is absorbed by the aluminum alloy material only by heat conduction. The amount of heat energy absorbed by the alloy material has increased dramatically.
When the amount of dry distillation gas increases, the temperature in the melting furnace body 21 rises, but when it exceeds 850 degrees Celsius, the damper of the duct that sends air to the air blowing pipe 35 is throttled, and the dry distillation gas is discharged from the air blowing pipe 35. The amount of air blown into the conversion furnace 3 is slightly reduced. Then, the generation amount of dry distillation gas decreases and the temperature in the melting furnace main body 21 falls.
When the temperature in the melting furnace main body 21 falls to less than 800 degrees Celsius, the damper of the duct that sends air to the air blowing pipe 35 is opened, and the dry distillation gasification furnace 3 is opened from the air blowing pipe 35. Increase the amount of air blown up a little. Then, the generation amount of dry distillation gas increases and the temperature in the melting furnace main body 21 rises.
The dry distillation gas is combusted and then flows through the exhaust gas port 24 and a duct pipe (not shown) to an exhaust gas processing device (not shown) for processing.
In the first embodiment, the collected aluminum wheel is put into the charging chamber A51 as a material. The gate A53 opens and closes at an appropriate interval, and the aluminum wheel drops from the input chamber A51 to the input chamber B52 by opening and closing the gate A53.
Further, the aluminum wheel collected in the charging chamber B52 falls to the melting furnace body 21 by opening and closing the gate B54. Since the gate A53 and the gate B54 are not opened at the same time, and one of them is always kept closed, the sealing degree of the melting furnace body 21 is maintained.
The molten aluminum alloy melt flows from the tap holder 25 to the outside of the aluminum alloy melting furnace 2 and is cast into a mold or the like as much as possible as a new aluminum alloy.

Whereas the invention of the first embodiment is configured to open and close the gate A45 and the gate B46 at predetermined time intervals using a timer, the invention of the second embodiment measures the oxygen concentration of the dry distillation gas flowing in the dry distillation gas path. A difference is that a sensor is attached and the timing of opening the gate B46 is controlled by the oxygen concentration.
The invention of the second embodiment differs from the invention of the first embodiment in that the rooster is configured as shown in FIG. Therefore, in the following description, avoiding redundant description, the operation when a sensor for measuring the oxygen concentration of the dry distillation gas flowing in the dry distillation gas path and the configuration and operation of the rooster 8 shown in FIG. 2 are described.
In the invention of Example 2, the time when the generation amount of the dry distillation gas is once increased after the tire chip is put into the gasification unit 31 is judged by the oxygen concentration of the dry distillation gas flowing in the dry distillation gas path, and the dry distillation gas The tire is inserted at a predetermined timing when the oxygen concentration exceeds 5%, which is a predetermined concentration.
Further, the rooster 8 according to the second embodiment is provided with a lattice-shaped lattice plate A81 having a space portion 81a and a lattice-shaped lattice plate B82 having a space portion 82a, and the lattice plate 81 is formed by a pneumatic cylinder (not shown). It was set as the structure made to slide.
When the space portion 81a and the space portion 82a are alternately placed, the closed state (FIG. 2A) is set, and when the space portion 81a and the space portion 82a are matched, the open state is set (FIG. 2B). The rooster 8 is opened and closed by sliding the lattice plate 81.
Gaps and holes are uniformly provided in the portions other than the space portions 81a and 82a of the lattice plates 81 and 82 so that the carbonized charcoal does not fall. Even in the closed state (FIG. 2 (a)), the air blown into the hopper portion passes through the rooster and flows to the gasification portion as evenly as possible.

  The present invention is used in industries that manufacture and sell light alloy melting furnaces, dry distillation gasification furnaces, light alloy melting equipment, and is used in industries that manufacture cast products of light alloys such as aluminum alloys and magnesium alloys, It is also used in industries that process industrial waste such as waste tires and waste aluminum wheels.

It is a block diagram of an aluminum alloy melting facility. It is sectional drawing showing the structure of a rooster.

Explanation of symbols

1: Aluminum alloy melting equipment 2: Aluminum alloy melting furnace 3: Dry distillation gasification furnace 4: Charger 5: Charger 6: Blower 7: Residue discharger 8: Rostor 9: Rostor 11: Air nozzle 12: Dry distillation gas smoke Road 21: Melting furnace body 22: Preliminary combustion chamber 25: Tap holder 26: Auxiliary burner 31: Gasification section 33: Ignition burner 34: Hopper section 34a: Hopper opening 35: Air outlet pipe 43: Input chamber A
44: Input chamber B 45: Gate A 46: Gate B
51: Input chamber A 52: Input chamber B 53: Gate A
54: Gate B 71: Slide block 71a: Discharge chamber A
71b: Discharge chamber B 72: Screw conveyor 73a: Fall path A
73b: Falling path B 74: Pneumatic cylinder 81: Grid plate A
81a: Space part 82: Lattice plate B 82a: Space part 91: Block

Claims (9)

  A dry distillation gasification furnace for dry distillation of a rubber tire or a rubber tire chip (hereinafter simply referred to as “tire”) and a light alloy melting furnace for dissolving a light alloy material are provided, and the dry distillation gasification furnace and The light alloy melting furnace is connected with a dry distillation gas flue, an air nozzle is provided toward the melting furnace main body of the light alloy melting furnace, the air blown out from the air nozzle is mixed with the dry distillation gas, and the light alloy melting furnace A light alloy melting facility characterized by combusting dry distillation gas in the melting furnace main body.   The light alloy melting facility according to claim 1, wherein air is blown from a lower part of the dry distillation gasification furnace, a temperature sensor is provided in the light alloy melting furnace, and the temperature in the light alloy melting furnace exceeds a predetermined temperature A. The amount of air blown from the lower part of the dry distillation gasification furnace is reduced, and the amount of air blown from the lower part of the dry distillation gasification furnace when the temperature in the light alloy melting furnace becomes lower than a predetermined temperature B. Light alloy melting equipment, which is configured to increase.   3. The light alloy melting equipment according to claim 1, wherein the tire is fed into a dry distillation gasification furnace in a batch system at predetermined time intervals.   The light alloy melting facility according to claim 1 or 2, wherein a tire is batch-fed into a dry distillation gasification furnace, an oxygen concentration sensor is provided in the dry distillation gas path, and the dry distillation flowing in the dry distillation gas path A light alloy melting facility characterized in that a tire is put into a dry distillation gasification furnace when the oxygen concentration of the gas exceeds a predetermined concentration.   In a dry distillation gasification furnace having a gasification section that generates dry distillation gas, a hopper section where charcoal and ash of a tire fall, and a rooster that separates the gasification section and the hopper section and can be opened and closed, A dry distillation gasification furnace characterized in that air is blown from a lower part of the gasification part and a hopper part corresponding to a lower part of the dry distillation gasification furnace.   6. A gasification furnace according to claim 5, wherein the charging chamber A and the charging chamber B are provided in two stages, and a gate A is attached to the charging chamber A and a gate B is attached to the charging chamber B, respectively. A dry distillation gasification furnace comprising a charging device configured to alternately open and close the gate A and the gate B at a predetermined timing.   A residue discharge device is provided in the dry distillation gasification furnace according to claim 5, wherein the residue discharge device includes a slide block, a drive unit that reciprocates the slide block, a drop path A, a drop path B, and the like. The discharge chamber A of the slide block and the drop path A match at the return end position of the slide block, and the discharge chamber B and the hopper opening match, and the slide block at the forward end position of the slide block The residue discharge device has a discharge chamber B and the drop path B that match, and the discharge chamber A and the hopper opening match, and has a conveyor below the drop path A and the drop path B. A dry distillation gasifier characterized by that.   A light metal melting furnace having a melting furnace main body for melting a light alloy and a tap holder for discharging a molten metal, comprising a combustion preliminary chamber and an auxiliary burner. 9. The light alloy melting furnace according to claim 8, wherein the charging chamber A and the charging chamber B are provided in two stages, and the gate A is attached to the charging chamber A and the gate B is attached to the charging chamber B, respectively. A light alloy melting furnace comprising a charging device configured to alternately open and close the gate A and the gate B.

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