JPS62195082A - Apparatus for recovering oil from waste resin - Google Patents

Abstract

PURPOSE:A waste resin is thermally decomposed in a dry distillation furnace in a state shielded from air, the generated dry distillation gas is cooled and condensed, impurities are removed from the condensed liquid to obtain a fuel oil and the noncondensed gas is washed and again used as a fuel. CONSTITUTION:Roughly crushed waste resin is charged to a dry distillation furnace 5 and heated with a burner in the furnace to effect dry distillation to generate dry distillation gas. The temperature in the furnace is raised to increase the generation of the dry distillation gas until the temperature in the furnace reaches a specific level. The furnace is continuously operated in that state to keep the generation of the dry distillation gas at a definite level. In the transient period before the generation of the dry distillation gas reaches a definite level, the gas is passed through a distillation apparatus 37 placed at a high level and composed mainly of pipes which pass necessary dry distillation gas and block other unnecessary components. The dry distillation gas passed exclusively through the dry distillation apparatus 37 is cooled with a cooler 9 and the condensed liquid is collected in a tank 7. Noncondensed gas is washed and reused as a fuel.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for recovering oil from resin-based waste, and more specifically, a device for recovering oil from resin-based waste.
A device that recovers oil from resin-based waste by cooling and coagulating the generated dry distilled gas, removing impurities from the liquefied product and refining it to produce fuel oil, and cleaning the gas that does not coagulate to use it again as fuel. It is.

[Prior art]

Currently, the amount of synthetic resins used is a real amount, but the amount of resin waste generated in factories, cities, and ordinary households is also real. has been done.

However, underground reserves are also subject to restrictions due to regional conditions, and incineration is not always an advantageous disposal method because it produces harmful gases, black smoke, and can cause significant damage to combustion equipment due to high temperatures and generated gas. I couldn't say it. on the other hand,
It is known that resin-based waste is pyrolyzed at 150 to 250°C to produce fuel oil and fuel gas, but this method of pyrolysis treatment of resin-based waste is difficult from the point of view of resource reuse. is also highly preferred. Conventional methods for thermally decomposing resin waste include incinerators using a fire bed and fluidized furnaces using a fluidized bed.

[Problem that the invention seeks to solve]

However, in the former case, the fire bed is severely damaged due to the high calorific value generated during the combustion of resin-based waste, and it is generally difficult to operate continuously for a long time. It is difficult to control the temperature over the length of the furnace, and there is also the complexity of having to pay great attention to controlling the amount of air supplied into the furnace to prevent overheating.

An object of the present invention is to eliminate the above-mentioned drawbacks of conventional resin waste combustion treatment and to provide an apparatus that can continuously produce fuel oil from resin waste at a high yield. There is a particular thing.

[Means for solving problems]

In order to achieve the above object, the present invention provides the following device.

That is, the present invention provides a dry distillation furnace having a built-in burner for heating resin waste and a visual recognition device for visually checking the residue inside the furnace, and a dry distillation furnace for supplying resin waste to the dry distillation furnace. A crusher that crushes resin waste, a cyclone that collects the crushed resin waste, a hopper that stores the resin waste supplied from the cyclone, and a continuous supply of the resin waste in the hopper to the dry distillation furnace. A hydraulic cylinder, a distillation device installed at a high place to pass only the dry distillation gas generated by thermal decomposition during the initial heating stage of the dry distillation furnace, and a dry distillation device led directly from the dry distillation furnace or through the distillation device. A cooler that cools the gas, a tank that collects the flocculated liquid that has condensed by cooling and the gas that has not condensed, a dust separator that removes impurities from the flocculated liquid in the tank, refines it, and supplies it as oil to an underground oil tank, and the tank. The distillation apparatus is characterized in that it is equipped with a scrubber that cleans the unagglomerated gas in the distillation tank with an alkali, and a washer that washes the gas that has been washed with the alkali with water, and the distillation apparatus is mainly composed of a pipe and has a cock valve and a manifold. , a device for recovering oil from resin-based waste.

[Effect]

First, crushed resin waste is placed in a dry distillation furnace and heated by a burner inside the furnace, so heat exchange is performed efficiently and dry distillation begins in a short time, and dry distillation gas begins to be generated.

Furthermore, as the temperature inside the furnace increases, the amount of dry distillation gas generated also increases, and when the temperature inside the furnace reaches a predetermined level, the device is operated continuously, and the amount of dry distillation gas generated remains constant. It starts to sag.

At this extreme stage until the temperature inside the furnace reaches a predetermined level, the resin waste inside the furnace is not sufficiently heated, so it becomes a viscous liquid that is not fully decomposed by heat. In most cases, this and a small amount of dry distillation gas coexist in the furnace, and as the temperature inside the furnace increases, the thermal decomposition proceeds and the amount of dry distillation gas gradually increases.

Therefore, at the beginning of this dry distillation, that is, during the transient period until a certain amount of dry distilled gas is reached, a distillation device is provided in order to pass only the necessary dry distilled gas and not pass any other unnecessary gas.

Since the distillation equipment is mainly made of pipes and is installed at a high place, only the dry distillation gas can pass through it. Therefore, at this point, all the dry distillation gas coming out of the dry distillation furnace has to go through the distillation equipment. , keep the cock of the pipe that directly connects the dry distillation furnace and the cooler closed.

The dry distilled gas that has passed through the distillation device in this manner is cooled in a cooler, coagulated, and collected in a tank.

In addition, after the temperature inside the dry distillation furnace reaches a certain level, the pipe that connects the dry distillation furnace and the cooler is opened to open the cock and the dry distillation gas is directly led to the cooler, and the dry distillation gas is directly led to the cooler via the Fujitome device. A large amount of 5 dry distillate gas is cooled, condensed and collected in a tank.

The flocculated and liquefied gas and the gas that could not be flocculated are collected in the tank.

Among these, the flocculated liquid is purified by removing impurities in a dust separator to become fuel oil, which is stored in an underground oil tank.

In addition, the uncoagulated gas collected in the tank together with the coagulating liquid is led from the top of the tank to the scrubber, where it is neutralized with caustic soda and becomes clean gas.Furthermore, after being washed with water in a washer, it is placed inside the furnace. The gas is sent to the burner and reused as fuel gas.

On the other hand, the crusher crushes the resin waste into small pieces in order to continuously supply the resin waste to the operating dry distillation furnace, and after the crushed resin waste is collected by a cyclone, it is stored in a hopper.

The resin waste in the hopper is continuously fed into the furnace by a hydraulic cylinder while blocking air into the furnace.

The inside of the furnace is heated to a high temperature and the pressure is always higher than the outside, so even when resin waste is fed into the furnace, air is prevented from flowing in from the outside and dry distillation is carried out rationally.

The internal visual inspection device that visually checks the residue inside the dry distillation furnace uses colored lights to illuminate red light with long wavelengths to make it transparent, and then uses a television camera to visually check the amount of residue through the flame inside the furnace. This makes it possible to determine an appropriate time to stop continuous operation of the furnace and to discharge the residue in the furnace.

(Example) Regarding an example of the present invention, how the configuration of the present invention is actually embodied will be described below with reference to the drawings, along with its operation.

FIG. 1 is an explanatory diagram of the configuration of an embodiment of the present invention, in which 1 is a crusher that crushes resin waste into 10 to 15 pieces, 2 is a cyclone 3 that collects the crushed resin waste. 4 is a hopper that stores the resin waste supplied from the cyclone 2 in an enclosure and allows it to come out little by little from the opening at the bottom. 4 is a dry distillation system for the resin waste from the hopper while blocking air. This is a hydraulic cylinder that continuously supplies water into the furnace.

5 is a dry distillation furnace, and as shown in the cross-sectional view in FIG.

Further, there is an upper lid 18 on the upper part of the peripheral wall 15, and a lower lid 19 on the lower part, both of which are kept warm by a heat insulating material 20.

The upper M18 is connected to the cylinder arm 2 by the upper cylinder 21.
It is opened and closed via 3. When the dry distillation furnace is not heated, resin-based waste is initially charged by opening the upper lid 18, so there is no need to crush it into pieces, and coarse crushing of about 500 m1 is sufficient.

When the lower lid 19 is opened and closed by the lower cylinder 22, the residue inside the furnace is discharged to the outside of the furnace.

A burner tube 24 is provided horizontally in the center of the furnace, and one end thereof is exposed from the peripheral wall 15 to the outside.

The other end of the burner tube 24 is connected to a box member 25 as shown in FIG.
．． Lower box member 26. Tube 29. Front box member 27. Pipe 30 upper box member 28. Continuing with the tubes 31, 32, 33, the terminal end 33a of the tube 33 passes through the peripheral wall 15 of the furnace and leads to an external flue (not shown).

Here, the box member connects the tubes and serves as a stand for supporting the tubes, and the tubes serve as a heat exchanger.

The tubes 29 and 30, which play the main roles in this heat exchanger, have a folded shape and are arranged two in parallel to ensure sufficient heat exchange.

The tubes 29 and 30 may have a non-circular cross section such as a square or ellipse to increase the cylindrical surface area and further increase the efficiency of heat exchange, and the most common round tube is easy to process and durable. It can also be a cheap one. These heating parts are made of refractory materials such as vanadium steel.

Reference numeral 34 at the top of the dry distillation furnace in FIG. 2 is a television camera, which in combination with color lights 35 constitutes a visual recognition device 36 for viewing the inside of the furnace from the outside.

Since the present invention is capable of continuous operation for a long period of time, it is necessary to visually check the amount of residue in the furnace during operation and determine an appropriate time to stop operation in order to discharge the residue from the bottom of the furnace. This is because the amount of residue varies depending on the type of resin system input and is not fixed. □This color light 35 uses red light with a long wavelength to increase transparency so that the amount of residue can be visually recognized through the flame, and assists the television camera 34 from the side. 1 is a distillation device, which is installed at a high place to allow only the dry distillation gas generated by thermal decomposition to pass through during the initial heating stage of the dry distillation furnace, and includes cock valves 40 and 41 for opening and closing, respectively. Manifole for distribution connection 42.'4
3 and tubes 44 and 45.

The manifold 43 is connected to the dry distillation furnace 5 by a pipe 46, and the pipe 46 is equipped with a cock valve 47.

When the dry distillation gas starts to come out, the temperature inside the furnace has not yet risen sufficiently, and the dry distillation gas coexists with a viscous liquid state that has not been thermally decomposed sufficiently, so the cock valve 47 is closed and the viscous liquid remains. 46 through the manifold 43 and into the cooler.

At this time, the cock valves 40 and 41 of the distillation device 37 are open, and only the dry distilled gas is guided through the distillation device 37 to the cooler.

The reason why the two pipes 38 and 39 are provided here is to consider the quantity and quality of the dry distilled gas generated.At the beginning of generating dry distilled gas, it is not possible to open only the cock valve 40 at the top. Once the temperature inside the dry distillation furnace has increased by 1, the cock valve 41 is opened to accommodate the increase in the amount of gas being emitted.After reaching a predetermined temperature, the cock valve 47 is opened to allow the gas to pass through the distillation equipment. The direct rule that does not occur is opened, and a large amount of dry distilled gas is sent to the cooler. In addition, in the embodiment, the distillation apparatus pipe 3
8.39 is shown as two, but the number may be increased or decreased as necessary.

Reference numeral 6 in FIG. 1 denotes a cooler, which is a water cooling device that cools the dry distilled gas that has been dry distilled in the dry distillation furnace 5 by introducing it through the distillation apparatus or directly.

The dry distilled gas coagulates as it cools, becomes a coagulated liquid, and enters tank 7.
are collected in.

In the tank 7, gases that have not completely condensed and remain as dry distilled gas are also collected in the upper part.

The flocculated liquid collected in the tank 7 is led from the bottom of the tank to the dust separator 10, where it is purified to remove impurities and becomes fuel oil, which is led to the underground oil tank 11, where it is stored and shipped. will have to wait.

On the other hand, the uncoagulated gas collected in the upper part of the tank 7 is led to a scrubber 8, where it is washed with alkali and neutralized. In the scrubber 8, cleaning is performed with a shower of 10% caustic soda solution.
□-- The gas that has been washed with alkali here is further led to the purifier 9, where it is washed with water.

゛During the above alkaline cleaning, □ Caustic sonida adhering
By washing with water, the Q portion also becomes a cleaner, non-polluting gas, which is supplied to the burner 12 of the dry distillation furnace and can be self-sufficient as a fuel in place of heavy oil. 'In addition, when the gas is small, it is discharged into the outside air from the chimney (not shown), but as mentioned above, it is thoroughly cleaned and there is no risk of pollution.

Since the present invention is configured in this way, in order to operate this device, first, the lower lid 19 of the dry distillation furnace 5 is opened by hydraulic pressure using the lower cylinder 22, and after the residue inside the furnace is discharged, The lower lid 18 is hydraulically opened by the upper cylinder 21, and the crushed resin waste is initially introduced into the furnace from there.

The burner 12 is supplied with heavy oil from the heavy oil tank 13 through the intervention of compressed air from the compressor 14, and begins to heat the inside of the furnace.

Dry distillation begins approximately 30 minutes after heating, so the gas is guided to the burner 12 to provide self-sufficient fuel in place of heavy oil.

The temperature inside the furnace reaches 150°C in about 1 hour, and from this point on, the resin waste to be supplied is not coarsely crushed, but is crushed by the crusher 1.
The particles are finely divided into 10 to 15 fins, and are automatically fed into the furnace through the route of crusher 1 - cyclone 2 - hopper 3 - hydraulic cylinder 4 - dry distillation furnace 5, and this apparatus is operated continuously.

The inside of the furnace is heated to a high temperature and always has a slight pressure, making it difficult for air to enter from the outside, so there is no risk of the furnace exploding.
Both the waste and the burner are inside the furnace, which provides extremely high thermal efficiency.

Even during continuous operation, the residue inside the furnace can be checked by the internal visual inspection device 36.
This allows for safe and efficient operation of the equipment, since the amount of residue can be visually confirmed and the appropriate time to discharge it from the furnace can be determined when the amount of residue has increased.

The gas that has been dry distilled in the dry distillation furnace 5 is kept open until the inside of the furnace reaches a predetermined temperature by opening the higher cock valve 40 of the distillation device 37 and gradually increasing the amount of gas. Since the next cock valve 41 is opened after waiting for this, it is possible to respond to an increase in the amount of gas while maintaining the quality of the gas.

After the temperature inside the furnace reaches a predetermined level, the cock valve 47 that directly connects the furnace to the cooler 6 is opened, and a large amount of dry distilled gas is guided to the cooler 6.

The gas cooled by the cooler 6 is led to a tank 7 where it is collected as a coagulated liquid, and from there, it is led to a dust separator 10 to remove impurities, and is converted into fuel oil and stored in an underground oil tank 11. and wait for shipment.

On the other hand, in the tank 7, gas that could not be coagulated even after cooling is collected in the upper part, and this gas is washed with alkali in a scrubber 8 and further washed with water in a washer 9, and then used for operation of the device. It is led to the burner 12 as fuel. Note that if this gas is small, it will be exhausted from a chimney (not shown).

〔Effect of the invention〕

In the present invention, a burner is provided in the dry distillation furnace to directly heat the resin-based waste in the furnace, so that heat exchange is performed extremely efficiently.

In addition, while the equipment is operating, waste can be automatically and rapidly fed into the crusher, cyclone, hopper, and hydraulic cylinder, so dry distillation is performed continuously, and the efficiency of furnace usage is reduced both in terms of time and heat utilization. It is also excellent in terms of

Furthermore, since there is always a slight pressure inside the furnace due to high-temperature heating, there is no risk of the furnace exploding because air does not flow in when waste is continuously fed.

In addition, a viewing device that combines a television camera and color light is installed at the top of the furnace, so the amount of residue inside the furnace can be visually checked during operation, and the appropriate time to discharge the residue can be determined.
It is possible to increase production of fuel oil through safe and efficient continuous operation.

In addition, since the distillation equipment is installed at a high place between the dry distillation furnace and the cooling unit, only high-quality dry distillation gas can be led to the cooler even before the temperature inside the furnace reaches a predetermined temperature during the initial stage of dry distillation. Quality improves.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of one embodiment of the present invention, and FIG.
Figure 3 is an explanatory cross-sectional diagram of the dry distillation furnace, and Figure 3 is an explanatory diagram of the main parts inside the furnace.
FIG. 4 is an explanatory diagram of the distillation apparatus shown in FIG. 1. 1... Crusher, 2... Cyclone, 3... Hopper, 4... Hydraulic cylinder, 5... Dry distillation furnace, 6. ...Cooler, 7..Tank, 8..Scrubber, 9..Cleaning device. 10...Dust separator, 11...Oil tank, 34...TV camera, 35...Color light, 36...Visibility device, 37... Distillation equipment. Applicant: Hakusan Kogyo Co., Ltd. Representative Patent Attorney Junya Suzuki Figure 3 114 ji! 1

Claims (1)

[Claims] A dry distillation furnace that has a built-in burner for heating resin-based waste and a visual recognition device for visually checking the residue inside the furnace;
A crusher that crushes resin waste to supply it to the dry distillation furnace, a cyclone that collects the crushed resin waste, a hopper that stores the resin waste supplied from the cyclone, and a hopper that stores the resin waste supplied from the cyclone. A hydraulic cylinder that continuously supplies the resin-based waste in the dry distillation furnace to the dry distillation furnace, a distillation device installed at a high place to pass only the dry distillation gas generated by thermal decomposition during the initial heating stage of the dry distillation furnace, and a distillation device that directly supplies the resin waste from the dry distillation furnace , or a cooler for cooling the dry distilled gas led through the distillation equipment, a tank for collecting the flocculated liquid that has coagulated by cooling and the gas that has not coagulated, and a condensed liquid in the tank that is purified by removing impurities and then stored underground as oil. The distillation device is equipped with a dust separator that supplies the oil tank, a scrubber that cleans the unagglomerated gas in the tank with alkali, and a washer that washes the alkali-cleaned gas with water. A device for recovering oil from resin-based waste, characterized by having a valve and a manifold.