JPS58110623A - Method and device for removal of synthetic resin from scrap of composite body of metal-synthetic resin - Google Patents

Abstract

PURPOSE:To remove synthetic resins economically with simple operations from composite bodies of metals and combustible thermoplastic resins by controlling the supply rate of air so as to continue melting, dropping and burning of the resins by the combustion heat of the resins in the scraps of said composite bodies. CONSTITUTION:For example, broad scraps 1a are erected and packed in scraps of composite Al-PE plates, and narrow scraps 1b are stacked and packed among the same. On ending of the packing, air is blown through an air supply pipe 7 into a combustion chamber 4, and the flames of a gas burner 6 are blown into the chamber 4 through an ignition port 5 to heat the inside of the chamber. Then, part of the PE of the composite plate scraps packed in the lowermost part of a holding chamber 1 melts, drops onto the bottom of the chamber 4 and begins to burn. When the molten PE in the bottom of the chamber 4 increases gradually, the burner 6 is extinguished, and the port 5 is covered. After the chamber 4 is ignited in such a way, the supply rate of air into the chamber 4 is controlled by monitoring the combustion temp. and the PE temp. in the bottom by means of thermocouples 8, 9, whereby the combustion temp. is maintained in an adequate range.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention describes a method for removing synthetic ** from a metal-synthetic resin covering layer and an apparatus therefor K11tb. As a method of removing resin and recovering metal, there is a method of burning and removing synthetic resin in a metal #1 IIIll furnace, but various problems remain.
Especially 11! T. Plywood scraps usually contain a large amount of polyethylene,
In order to recover the aluminum by directly putting it into the #l tile furnace like general scrap and melting the aluminum, the polyethylene in the furnace was heated in mm, as shown below. This causes problems. ■ A large amount of black smoke @) is emitted, worsening the security situation ◎This j[
The reason for this is that natural ventilation alone does not provide sufficient oxygen due to the rapid thermal decomposition of polyethylene at high temperatures, so the polyethylene is used in layers with incomplete 1K hooks.

■ The temperature inside the furnace becomes extremely high, causing the hot water to overheat and, in severe cases, damaging the bricks on the inside wall of the furnace.◎The cause of this is that polyethylene is a high-calorie material, and as it burns, it releases a large amount of combustion heat. 〇■ The yield of aluminum recovery is low. This is because the aluminum in the charged composite layer is significantly oxidized due to the abnormally high temperature inside the furnace.

In order to solve this problem, the synthetic resin is removed from the metal-synthetic resin composite layer, such as the aluminum-polyethylene composite layer, using a sophisticated method, and the remaining metal fittings are melted and recovered. However, the purpose of the present invention is to provide a method and an apparatus for the removal of the synthetic resin from the material by a simple operation and economically. The holding chamber of the combustion removal device has a holding chamber for holding, a combustion chamber provided at the bottom of the holding chamber, and a perforated plate separating the holding chamber and the combustion chamber. Fill the combustion chamber with the waste of a composite consisting of m A metal-synthetic resin covering layer characterized by adjusting the amount of air supplied into the combustion chamber so that the molten scissor resin falls into the combustion chamber and the resin continues to burn at 1 mm 1 K. Method for removing synthetic resin from
A holding chamber for holding &m objects, below the holding chamber flAK
It has a combustion chamber provided, a perforated plate that partitions the holding chamber and the IIIA Yakitomi, an air supply pipe for supplying air to the axillary combustion chamber circle, and an exhaust pipe provided at the top of the holding chamber. , a method for burning and removing synthetic resin from metal-synthetic ballast composite debris, which is characterized by being configured to be able to seal parts other than the exhaust pipe! The following is a summary of the implementation of this issue! This will be explained in detail with reference to Figure 81 showing the figure and JWA 〇 Figure 1 is a vertical joint view schematically showing an example of the combustion removal device of the present invention.
In Figure 1, which is a longitudinal cross-sectional view (Figure 1! (1) is a holding chamber for holding the object to be processed, and (4) is holding chamber 1! +1) is a combustion chamber provided at the bottom, (2) is a perforated plate that partitions the holding chamber (1) and combustion chamber (4), (the force is air for supplying air into the combustion chamber (4) Supply pipe, QQI is holding chamber (1)
In the combustion removal device shown in FIG. 1, which is an exhaust pipe provided at the upper part of the exhaust pipe Ql, all parts other than the exhaust pipe Ql are configured to be airtight.

Further, it is preferable that this device is kept warm with a heat insulating material such as slag cool to improve thermal efficiency.

Next, the method of removing synthetic resin from a metal-synthetic resin composite layer according to the present invention will be explained by exemplifying the case where polyethylene is burned and removed from an aluminum-polyethylene composite plate layer by burning and removing tX as shown in the figure. .

In the present invention, the aluminum-polyethylene composite plate layer to be subjected to the gate burn removal treatment is filled in the holding chamber (1).The material to be treated can be taken in and out of the holding chamber fl), for example, through a part of the side wall of the holding chamber. The door can be opened and closed, or the ceiling can be opened and closed! If the filling height of the argonium-polyethylene composite plate layer in the zero holding chamber is too high, the processing time will be significantly longer, and in extreme cases, polyethylene removal may be incomplete. From, 1a0
It is preferable to set it to about 0ax or less.

In addition, the lower composite plate layer is one of the upper composite plate layers.
In order to prevent the spinning from being crushed by F, it is preferable to divide the inside of the holding chamber in the vertical direction into three stages with Rosdol perforated plates (-a). In addition, for filling, wide width waste (for example, width!1
In order to improve the separation of polyethylene (0-700- or more), it is preferable to stack the composite board with the longitudinal direction horizontally, such as K (/"L) m. In order to support the holding chamber and at the same time reduce the mutual pressure from the sides, the horizontal direction inside the holding chamber is also divided into several sections using perforated plates (cob) such as T'C Rossdol, and the height of each level in the vertical direction is increased. If you ask me, if a holding chamber with a height of 6θ0- is partitioned by JRK, it will be 1
00m 8 degrees) KTo, cut appropriately and fill. For comparatively small narrow width waste (for example, width: 0-100 square meters or less), check and fill it as shown in the (/kl) section. Furthermore, in order to efficiently drop the melted polyethylene into the combustion chamber (4), each stage below the top stage partitioned by a perforated plate should be provided with an empty space ff # (3J at an appropriate location M). Preferable 0
In the present invention, it is possible to remove polyethylene without providing vertical and horizontal partitions and voids as described above, but in that case, the processing time may become longer depending on the object to be processed. .

After filling the aluminum-polyethylene composite plate layer, the combustion chamber is first ignited to begin removing the polyethylene fuel. Ignition of the combustion chamber is done through the air supply pipe (7
) This is done by heating the inside of the combustion chamber (4) while blowing air from the combustion chamber (4).This heating may be done by any ignitable means, but l! /As shown in the figure, it is convenient to use a gas burner. In other words, remove the lid of the ignition port (5))
, the flame of the gas burner (6) is blown into the combustion chamber through the ignition port (5) and the inside is heated.0-If the inside of the combustion chamber is heated for a while with K in this way, the i! (A part of the polyethylene in the polyethylene composite plate layer filled at the bottom of υ melts and falls to the bottom of the combustion chamber, starting combustion.) If heating continues, a portion of the polyethylene from the holding chamber will melt. As the polyethylene bath continues to heat up, the bath melt polyethylene (hereinafter referred to as bottom polyethylene) accumulates at the base of the combustion9, its amount increases by gK, and the fire intensity due to polyethylene combustion reaches 'A'. 0 When the combustion of the bottom polyethylene is sufficiently stable, extinguish the gas burner (6) and close the ignition port (
Cover 57.

After igniting the fuel 111 [K in this way, the thermocouple (8)
, (9) K] Perform combustion removal of the tin layer of polyethylene while monitoring the combustion temperature and the temperature of the bottom polyethylene o1
The firing temperature is preferably kept in the range 8 to 0°C, more preferably 4170 to 0°C. If the combustion temperature is low, the processing time tends to be long, and if it is extremely low, suitable combustion is maintained. This becomes difficult. On the other hand, if the combustion temperature is too high, the amount of carbon generated will increase, and the generated carbon will stick to the recovered aluminum and the inside of the equipment, contaminating the work environment when removing the recovered aluminum, or causing the recovery Even after using aluminum, it is not preferable because the process becomes complicated.

Therefore, the practically appropriate combustion temperature range in which there is almost no carbon adhesion and the processing time is within a few hours is 6. Adjust the amount of air supplied from the air supply pipe (7) into the combustion chamber.In other words, if the amount of air supplied into the combustion chamber is increased, the combustion temperature will rise, and if it is decreased, it will be lowered◇ The amount of air supplied to maintain the proper combustion temperature range for the holding chamber may actually be very small, on the order of j-10- of the theoretical amount of air required to burn mK* of all the polyethylene in the bed filled in the holding chamber. Note that what is supplied from the air supply pipe is not limited to natural air itself;
Any material diluted with a diluent gas such as 1 is maintained within the range of 〇θ~*SO℃. This is not preferable because the speed of decomposition increases significantly, black smoke <S> is generated, and a large amount of carbon adheres to the recovered aluminum. When the heat retention structure (e.g., insulation material, etc.) at the bottom of the combustion chamber (4) is appropriately designed and the combustion temperature trap is maintained within an appropriate range, the temperature of the bottom polyethylene will also be appropriate. It is preferable to adjust K so that K can be maintained within a certain range.

In such a case, it is not necessary to adjust the temperature of the bottom polyethylene to 41, just by adjusting the combustion temperature, but it is necessary! ! Depending on the situation, it is also possible to incorporate a separate heating or cooling mechanism in the combustion ml to adjust the temperature of the bottom polyethylene independently of the combustion temperature.

It should be noted that the appropriate range of combustion temperature and bottom temperature will of course vary depending on the type of synthetic resin and metal that make up the composite. If the structure is such that the air is blown downward, the temperature of the bottom polyethylene will rise, and when the amount of bottom polyethylene becomes significantly small, the bottom of the combustion chamber will be overheated and there is a risk of accelerating the wear and tear of the bottom member. In the case of sub-air supply pipes as shown, KFi, Fig. 2 (-), (1
)) Close the head (2) of the tip and make a hole Q on the side.
4 is preferably provided so that air can be blown out laterally.

When the bottom polyethylene is continued to be burned in 4fim in this way, the polyethylene in the aluminium-polyethylene composite plate layer in the holding chamber is thermally decomposed and melted and falls into the combustion chamber, where thermal decomposition and combustion proceed. ,
Removal of polyethylene from the composite board layer is performed. Since the melted and falling nine polyethylene joins the bottom polyethylene,
The bottom polyethylene serving as fuel is constantly replenished as long as there is polyethylene remaining in the holding chamber. However, the aluminum in the holding chamber! - Burning off of polyethylene is completed when the polyethylene in the polyethylene cover layer is exhausted and then the J& part polyethylene is burned out.

After completion, continue supplying air to the combustion chamber for a while to completely burn out the small amount of polyethylene remaining in the holding chamber, and then stop the supply of air and leave it to cool. Take out 41!9 of the remaining friend Al 1nium and collect it.

During the combustion removal process of the present invention, decomposition products of polyethylene are generated and are emitted from the exhaust gas i+no, but if these are directly released into the atmosphere, Jj111! ! It is preferable to dispose of it appropriately as it may seriously harm the environment. There are seven methods for achieving this, including a method in which the emitted decomposition products are completely combusted and released. In other words, the amount of decomposition products emitted is small at the ignition timing of the combustion chamber, and is insufficient for self-combustion. However, when the combustion inside the combustion chamber becomes full-scale and becomes stable, the concentration becomes sufficient for self-combustion. Therefore, prior to the ignition of the combustion chamber, the upper part of the exhaust stack 01 was covered with flame by the exhaust gas ignition burner Q1, and the low concentration decomposition products emitted during ignition were auxiliary burned, and combustion in the combustion chamber began in earnest. Afterwards, the burner αη for igniting the exhaust gas is turned off, and the decomposition products are completely combusted by self-combustion. At this time, it is advantageous to supply J-hybrid air through the air supply pipe 03 provided in the exhaust pipe a to promote combustion.

However, since this decomposition product has sufficient combustion heat comparable to Wataru oil or natural gas, it is not possible to completely burn it in the exhaust stack aQ as described above. It is made up of valuable materials such as combustible and flammable gas components.
It is also possible to collect and reuse these valuables using appropriate methods.

As described above, if polyethylene is burned and removed according to the present invention, only by burning polyethylene, Al 1 =
The rim is recovered without S* and with almost no oxidation ◎Also, the recovered 9Al 1=rim has almost no adhesion of carbon or tar, and has the same gloss as before treatment. Because it is of very good quality, it can be pressed all over the place like ordinary scrap, then melted and reused.

Moreover, according to the combustion removal method of the present invention, the processing operation is extremely simple (ToJ), requires almost no manpower except for charging the material to be processed, taking out the recovered material, and igniting, and reduces the amount of fuel and air used. are extremely rare. Furthermore, since the combustion removal device of the present invention has a simple structure and a low processing temperature, it does not require difficult work or expensive materials to manufacture, and the auxiliary equipment such as a blower can be small-capacity and inexpensive. According to the present invention, it is possible to economically remove polyethylene (from two polyethylene composite plate layers) with simple operations, and from such composites, which have conventionally had low utility value as aluminum scrap. The plate layer can be effectively reused as a raw material for aluminum melting, and the cost of the product can be reduced. The above has specifically explained the case of processing an aluminum-polyethylene composite plate layer according to the present invention. The present invention can be applied not only to aluminum-polyethylene composite plate layers but also to general metal-combustible synthetic resin composite layers by simply changing the processing conditions.

In addition, the processing operation is not limited to the batch method as described above, but by appropriately configuring the equipment, a continuous method is also adopted in which the composite layer is introduced and the metal is recovered during the combustion removal process. It is possible to do so.

The present invention will be explained in more detail with reference to Examples below.
The present invention is not limited to the following examples as long as they do not exceed the gist of the invention.

Example 1 Polyethylene was removed from a full denium-polyethylene composite board layer in accordance with the present invention using a device as shown in Figure 1, which was manufactured using a drum of Ko001. The treatment conditions and results are shown in Table 1. Note that the approximate lN of the device is 9 in Table 1 below. O was of extremely high quality.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view schematically showing an example of the combustion removal device of the present invention, and FIG. 1 is a diagram showing an example of the tip of the air supply pipe of the device shown in FIG. Fi its vertical sectional view,
Figure 1 (cut is the bottom view of O) In the figure, l: holding chamber laH wide scrap lb: narrow layer perforated plate 3: gap s 4': combustion chamber S: ignition port 7: supply pipe f , q: thermocouple io: #l- cylinder broom permit armpit person
Mitsubishiba Metal Industries Co., Ltd. Agent Patent Attorney Nagaon - 1 other person 1 Illustration procedure amendment Showa 1iIJl! ! F-T/7th Japan Patent Office Commissioner Shima 1) Haruki Tono / Incident Indication 1939 Patent Application No. 273 Octopus θ Title of Invention Method for removing synthetic resin from a metal-synthetic resin composite layer and its purpose Apparatus 3 Two applicants making the amendment: Mitsubishi Light Metal Industries, Ltd. and the agent Mitsubishi Chemical Industries, Ltd., 2-chome Yuban, Marunouchi, Chiyoda-ku, Tokyo 100 (and 7 others) ”, “Patent Request, Filing (number of inventions listed in the box)” column, “Inventor” column, “Patent Applicant” column, “
"Representative" column, "Inventory of attached documents" column and "Agents other than the above" column (patent application)”. (2) Add "λ Number of inventions stated in claims 2" in the "Number of inventions stated in claims" field next to "Name of invention" field in the application. . (3) "An agent other than the above" in the "Inventor" column of the application form
Increment the column number by / up to the column. that's all

Claims (1)

[Scope of Claims] TI) A combustion removal device having a holding chamber for holding an object to be treated, nine combustion chambers provided at the lower part of the holding chamber, and a perforated plate partitioning the holding chamber and the combustion chamber. The holding base is filled with scraps of a composite consisting of metal and a flammable thermoplastic synthetic resin, and the wrinkled resin is held in a molten and combustible state in the combustion chamber, thereby retaining the sparkling resin due to the heat of combustion. Melting of the skeleton resin in the wrinkled composite waste in the room, falling of the melted scissor fat into the combustion chamber, and combustion chamberk) Combustion m so that the burning of the wrinkled resin continues. A method for removing synthetic resin from metal-synthetic fat composite metal body waste, the method comprising adjusting the amount of air supplied to the circle. (2. Claim No. 11 [K] The method for removing a synthetic resin as described in K, characterized in that the polyethylene composite is an Al1=rimu polyethylene composite. (3) Claim No. 2 In the synthetic resin removal method described in section 1, the combustion temperature of #resin in the combustion chamber is 0!
−! 00" .～SOO℃◎ (5) A holding chamber for holding the object to be processed, a combustion chamber provided at the lower part of the armpit holding chamber, and a combustion chamber between the holding chamber and the combustion w11ii.
It has a perforated plate to separate it, a 9-air supply pipe to supply air to the inside of the axillary combustion chamber, and an exhaust pipe installed at the top of the storage chamber, and the parts other than the mosquito exhaust pipe can be sealed and closed. 1. A device for burning and removing synthetic resin from a metal-synthetic resin composite layer, characterized in that it is made of a metal-synthetic resin composite layer.