JPWO2016147344A1 - Plastic continuous oil making equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic-type continuous oiling apparatus capable of oiling plastics with high yield and having high economic efficiency. SOLUTION: In a continuous oil liquefaction apparatus for plastic, a vaporizer 4 for heating and vaporizing a plastic liquid body 45 includes a tubular member 40 having a riverboat-like outer shape, and an upper portion of the outer shape of the tubular member 40 is rectangular. And the lower portion is formed in a curved shape, and the curved portion 40a is formed so that the plastic liquid body 45 is accommodated in the curved portion 40a formed in the curved shape of the tubular member 40, and the upper edge of the curved portion 40a is formed. The distance between the portion and the bottom of the bending portion 40a is set to 350 mm or less. [Selection] Figure 6

Description

  The present invention relates to a plastic continuous oil making apparatus, and more particularly to a plastic continuous oil making apparatus capable of continuously oiling a plastic oil component and regenerating it as a fuel. is there.

  Plastic products made from naphtha obtained in the process of refining crude oil are produced in large quantities, and as a result, the plastic that is used and discarded (referred to as “waste plastic” in this specification) is enormous. The amount has been reached.

  For this reason, efforts to recycle waste plastics and recycle waste plastics for effective use are being actively carried out. Waste plastic recycling methods include material recycling, chemical recycling, and thermal recycling. Thermal recycling, which uses waste plastic as a source of thermal energy, is a useful waste plastic recycling method. As a method for using the fuel, various techniques have been proposed for practical use.

  In a general method for pulverizing waste plastics, the waste plastics are cut or left as they are, and are thermally decomposed to a temperature equal to or higher than the melting point to vaporize, and the vaporized gas is cooled to produce oil.

  Moreover, there are two types of waste plastic oiling devices, batch type and continuous type, and the continuous type is preferred from the viewpoint of efficiency.

  In International Publication WO2013 / 058366 A1 (Patent Document 1), an extruder that makes a discarded plastic piece into a gel state by frictional heat, and a gel-like plastic supplied from the extruder are separated from the surroundings by a planar heating element. A cylindrical first buffer tank that is heated to 390 ° C. to 405 ° C., and a cylindrical shape that heats the molten plastic supplied from the first buffer tank to 400 ° C. to 415 ° C. from the surroundings by a planar heating element covering the peripheral wall The second buffer tank, the cylindrical evaporating pot that heats and gasifies the liquid plastic supplied from the second buffer tank, and the plastic gas supplied from the evaporating pot is liquefied to produce hydrocarbon oil Disclosed is a continuous plasticizer for waste plastics that has a condenser that can be used to vaporize liquid plastic in an evaporation kettle. So that the area is maximized, the liquid surface of the liquid plastic in the evaporation container is to be located diametrically central position of the cylindrical body, it is described that it is preferable to control the motor of the extruder.

International Publication WO2013 / 058366 A1

  As described above, in the oil making apparatus disclosed in Patent Document 1, in order to maximize the evaporation area of the evaporation pot, the liquid level of the liquid plastic in the evaporation pot is the center position of the diameter of the cylinder. Since the motor of the extruder is controlled so as to be located in the liquid plastic, the depth of the liquid plastic in the evaporation kettle is deep. In the specification, these are collectively referred to as “cold water block”), and bumping is likely to occur, and there is a problem that the yield of oil cannot be improved. In particular, when a large evaporating kettle is used to process a large amount of waste plastic, there is a problem that a cold water mass is generated and the probability of bumping is increased.

  Accordingly, an object of the present invention is to provide a plastic continuous oil making apparatus that can plasticize a plastic in a high yield and is highly economical.

Such an object of the present invention is to heat and melt a plastic, to heat and melt the melted plastic melt, to heat and vaporize the liquefied plastic liquid, and to vaporize the vaporized plastic gas A plastic continuous oiling device configured to cool components and separate them into an oil component and a gas component, and a vaporizer for heating and vaporizing the plastic liquid has a riverboat-like outer shape. A tubular member, wherein an upper part of the outer shape of the tubular member is rectangular, a lower part of the outer shape is formed in a curved shape, and the plastic liquid material is accommodated in a curved part formed in the curved shape of the tubular member. The plastic continuous oiling apparatus is characterized in that the curved portion is formed, and the distance between the upper edge of the curved portion and the bottom of the curved portion is set to 350 mm or less. It is made.

  According to the present invention, the vaporizer includes a tubular member having a river boat-like outer shape, the upper portion of the outer shape of the tubular member is rectangular, the lower portion is formed in a curved shape, and is formed in a curved shape that accommodates a plastic liquid material. Since the distance between the upper edge of the bent portion and the bottom of the bent portion is set to 350 mm or less, when heated, the distance between the plastic liquid is low due to the low thermal conductivity, which is a general property of plastic. A region having a temperature that is specifically lower than the surroundings and temperature unevenness (generally referred to herein as “cold water mass”) are generated in the body, effectively preventing bumping. And because the tubular member has a riverboat-like profile and the liquid level of the plastic liquid is sufficiently wide, it is possible to increase the evaporation rate, and therefore the vaporizer can achieve the desired To the plastic Vaporizing click liquid material, to cool the gas component of vaporized plastic, it is possible to produce a high-quality oil.

  In a preferred embodiment of the present invention, the vaporizer is configured such that the height position of the liquid surface of the plastic liquid material substantially matches the height position of the upper edge of the curved portion of the tubular member. Yes.

  According to a preferred embodiment of the present invention, the vaporizer is configured such that the height position of the liquid surface of the plastic liquid material substantially matches the height position of the upper edge of the curved portion of the tubular member. Thus, the liquid level of the plastic liquid can be further increased, and therefore the evaporation rate can be further improved.

  In a preferred embodiment of the present invention, the curved portion of the tubular member is formed such that a distance between an upper edge of the curved portion of the tubular member and a bottom portion of the curved portion is 200 mm to 350 mm.

  In a further preferred aspect of the present invention, the curved portion of the tubular member is formed such that a distance between an upper edge of the curved portion of the tubular member and a bottom portion of the curved portion is 250 mm to 300 mm. .

  When the depth of the plastic liquid material accommodated in the curved portion is less than 200 mm, the portion in contact with the curved portion becomes small, and as a result, the flow of the plastic liquid material inside the vaporizer during heating becomes small. In this preferred embodiment of the present invention, the curved portion of the tubular member may cause the plastic liquid material to be heated without flowing, and the plastic liquid material may be burnt. Since the curved portion of the tubular member is formed so that the distance between the upper edge of the tube and the bottom of the curved portion is 200 mm to 350 mm, the plastic liquid material is formed to have a depth of 200 mm to 350 mm in the curved portion. It can be accommodated and can effectively prevent the plastic liquid from burning.

  In a further preferred embodiment of the present invention, the outer shape of the curved portion of the tubular member is formed by a smooth curve.

  In a further preferred embodiment of the present invention, the cross section of the curved portion of the tubular member has a shape obtained by cutting out a virtual circle by a horizontal plane, and the upper edge of the curved portion is perpendicular to the center of the virtual circle. On the other hand, a plane extending at an angle of θ / 2, a plane extending at an angle of −θ / 2 (θ is 70 degrees to 90 degrees), and an imaginary circle are defined. .

  According to a further preferred embodiment of the present invention, the upper edge of the curved portion is located below the maximum diameter portion of the imaginary circle, so that the depth of the plastic liquid material is 350 mm or less in the curved portion. When heated, a cold water mass is generated in the plastic liquid body, and it is possible to effectively prevent bumping, so that the vaporizer can remove the plastic as desired. It is possible to vaporize the liquid and cool the vaporized gas component of the plastic to produce high quality oil.

  ADVANTAGE OF THE INVENTION According to this invention, a plastic can be liquefied with a high yield, and it becomes possible to provide the plastic continuous oil-ized apparatus with high economical efficiency.

FIG. 1 is a schematic perspective view showing an entire plastic continuous oil making apparatus according to a preferred embodiment of the present invention. FIG. 2 is a schematic diagram of a meter, an extruder and a multilayer heating unit. FIG. 3 is an enlarged vertical sectional view of a main part of the extruder. FIG. 4 is a schematic longitudinal sectional view of the multilayer heating unit. FIG. 5 is a schematic cross-sectional view taken along line AA in FIG. FIG. 6 is a schematic perspective view of the vaporizer. FIG. 7 is a schematic view of a vaporizer, a cooler, and an oil component storage tank. FIG. 8 is a schematic longitudinal sectional view of a multilayer heating unit used in a plastic oiling apparatus according to another preferred embodiment of the present invention. FIG. 9 is a schematic cross-sectional view taken along line BB in FIG. FIG. 10 is a schematic perspective view of a vaporizer used in a plastic oiling apparatus according to another embodiment of the present invention.

  FIG. 1 is a schematic perspective view showing the entire plastic continuous oil making apparatus according to a preferred embodiment of the present invention, and shows a state in which the cover of the apparatus is removed.

  As shown in FIG. 1, the plastic continuous oil making apparatus according to a preferred embodiment of the present invention measures a cut-out plastic and heats a measuring instrument 1 that receives the plastic and a plastic supplied from the measuring instrument 1. Then, the melted and conveyed extruder 2, the supply of molten plastic from the extruder 2, the molten plastic is heated and liquefied, and the liquefied by the multilayer heating unit 3 A vaporizer 4 that heats and vaporizes the plastic liquid material; a cooler 5 that cools the gas vaporized by the vaporizer 4 and separates the oily components and hydrocarbon gases that have not been oiled; An oil component storage tank 6 is provided for filtering and storing oily components generated by cooling the gas by the cooler 5.

  Here, hydrocarbon gases that have not been liquefied by the cooler 5 are sent to a catalytic reactor (not shown), rendered harmless, and released to the atmosphere.

  FIG. 2 is a schematic view of the meter 1, the extruder 2, and the multilayer heating unit 3.

  As shown in FIG. 2, the measuring instrument 1 receives the cut plastic while weighing it and is temporarily stored in the hopper 10, disposed below the opening of the hopper 10, and temporarily stored in the hopper 10. A belt feeder 12 is provided for receiving the plastic, transporting it while measuring the weight of the plastic, and dropping it onto the extruder 2 from the opening 11.

  FIG. 3 is an enlarged vertical cross-sectional view of a main part of the extruder 2.

  As shown in FIG. 2 and FIG. 3, the extruder 2 includes a cylinder 20 and a rotatable helical rod 22 having a spiral protrusion 21 formed on the surface of the cylinder 20. The upstream end is connected to the electric motor 24 via a bearing, a coupling and a bevel gear (not shown).

  The plastic conveyed through the measuring instrument 1 by the belt feeder 12 is supplied to the extruder 2 through the opening 11 of the measuring instrument 1 formed above the most upstream part of the helical rod 22.

  The helical rod 22 has a spiral projection 21 formed on the outer surface of a solid rod-like member, and the interval between the adjacent spiral projections 21 of the helical rod 22 and the inner wall of the cylinder 20 is as follows. For example, it is set to about 5 mm.

  The rotational force of the electric motor 24 is transmitted to the helical rod 22 through the bevel gear, the coupling and the bearing, and the helical rod 22 rotates, and the plastic supplied into the extruder 2 is connected to the multilayer heating unit 3. It is conveyed toward the downstream end portion of the extruded extruder 2.

  A heater 26 covered with a heat insulating material 25 is wound around an outer peripheral portion of the extruder 2 excluding the upstream portion of the cylinder 20, and the plastic supplied to the extruder 2 is fed by the helical rod 22 to the extruder 2. While being conveyed inside, it is heated by the heater 26, melted in a jelly shape, and conveyed to the multilayer heating unit 3.

  4 is a schematic longitudinal sectional view of the multilayer heating unit 3, and FIG. 5 is a schematic transverse sectional view taken along the line AA of FIG.

  As shown in FIGS. 4 and 5, the multilayer heating unit 3 includes two heating tubes 30 and 31 that are arranged concentrically and have a cylindrical shape. Of the two heating tubes 30 and 31, the inner heating tube 30 located inside is formed by a cylindrical body 30a having a radius R1 and a cylindrical body 30b having a radius R2 (here, R1 <R2). A space through which the plastic melt flows is formed between the cylindrical body 30a and the cylindrical body 30b. On the other hand, of the two heating tubes 30 and 31, the outer heating tube 31 positioned outside is formed by a cylindrical body 31a having a radius R3 and a cylindrical body 31b having a radius R4 (here, R1 <R2 <R3 <R4), a space through which the plastic melt flows is formed between the cylindrical body 31a and the cylindrical body 31b.

  The inner heating pipe 30 communicates with the inlet passage 28 connected to the downstream end of the extruder 2 at its upper end, and the outer heating pipe 31 communicates with the lower end of the inner heating pipe 30.

  As shown in FIGS. 4 and 5, a cylindrical first heater 32 is arranged inside the cylindrical body 30 a constituting the inner heating tube 30, and the cylindrical body 30 b and the outer heating tube 31 are configured. A cylindrical second heater 33 is disposed in the space between the cylindrical bodies 31a, and the molten plastic flowing in the inner heating pipe 30 is composed of the first heater 32, the second heater 33, and the like. It is comprised so that it may heat from both sides.

  The multilayer heating unit 3 further includes a cylindrical third heater 34 outside the cylindrical body 31b constituting the outer heating tube 31, and the molten plastic flowing in the outer heating tube 31 is also the second. The heater 33 and the third heater 34 are heated from both sides, and the second heater 33 is configured to heat both the molten plastic flowing in the inner heating pipe 30 and the molten plastic flowing in the outer heating pipe 31. Has been.

  As the first heater 32, the second heater 33, and the third heater 34, for example, a ceramic heater is preferably used.

The heating temperature of the heater 26 provided in the extruder 2 is set so that the molten plastic is supplied at a predetermined inlet temperature T _inlet from the extruder 2 to the inlet passage 28 connected to the inlet portion of the multilayer heating unit 3. Has been.

Here, the inlet temperature T _inlet of the molten plastic at the inlet of the multilayer heating unit 3 is
(T0−45) ℃ ≦ T _inlet ≦ (T0−15) ℃
Preferably, the molten plastic is heated by the heater 26 of the extruder 2. Here, T0 is the vaporization start temperature of the plastic.

Specifically, when the plastic is polyethylene, 350 ° C. ≦ T _inlet ≦ 380 ° C. is preferable, and T _inlet is most preferably 375 ° C. to 380 ° C.
On the other hand, when the plastic is polypropylene, 340 ° C. ≦ T _inlet ≦ 370 ° C. is preferable, and T _inlet is most preferably 365 ° C. to 370 ° C.

On the other hand, when the plastic is polystyrene, 320 ° C. ≦ T _inlet ≦ 360 ° C. is preferable, and T _inlet is most preferably 345 ° C. to 355 ° C.

If the inlet temperature of the molten plastic is less than (T0-45) ° C., the viscosity of the molten plastic is too high, and it becomes difficult to uniformly supply the molten plastic into the inner heating tube 30 of the multilayer heating unit 3. The multilayer heating unit 3 makes it extremely difficult to uniformly heat the molten plastic, and in the portion where the temperature of the molten plastic is low, the carbon chain of the molten plastic is difficult to break. It is extremely difficult to gasify and produce a uniform and good quality oil. On the other hand, when the inlet temperature T _inlet of the molten plastic exceeds (T0−15) ° C., the inlet portion of the multilayer heating unit 3 In this case, the molten plastic is gasified and the multilayer heating unit 3 makes it difficult to uniformly heat the molten plastic. HAZARD unfavorable phased plastic from flowing back into the extruder 2.

Therefore, as described above, by controlling the temperature T _inlet at the _inlet to the multilayer heating unit 3, the first heater 32, the second heater 33, and the third heater 34 of the multilayer heating unit 3 cause the molten plastic to flow. It becomes possible to supply the vaporizer 4 with sufficient and uniform heating.

  As shown in FIG. 4, the outer heating pipe 31 of the multilayer heating unit 3 communicates with the outlet passage 36 to the vaporizer 4 at the upper part.

  In the multilayer heating unit 3 configured as described above, the molten plastic supplied from the extruder 2 first flows downward in the cylindrical inner heating tube 30, and the first heater 32 and the second heater 32 are then flown downward. Heated from both sides by the heater 33.

  Next, the molten plastic is supplied from the lower end portion of the inner heating tube 30 to the outer heating tube 31, flows upward in the cylindrical outer heating tube 31, and is caused by the second heater 33 and the third heater 34. Heated from both sides.

  The molten plastic heated in the cylindrical inner heating pipe 30 and the cylindrical outer heating pipe 31 of the multilayer heating unit 3 is liquefied and vaporized from an outlet passage 36 attached to the upper part of the cylindrical outer heating pipe 31. 4 is supplied.

The heating temperature of the first heater 32, the second heater 33, and the third heater 34 provided in the multilayer heating unit 3 is the outlet temperature T when the molten plastic is sent from the outer heating pipe 31 to the outlet passage 36. _outlet
(T0−40) ℃ ≦ T _outlet ≦ (T0−10) ℃
Preferably, T0 is the plastic vaporization start temperature and T _inlet <T _outlet .

Specifically, when the plastic is polyethylene, 360 ° C. ≦ T _outlet ≦ 400 ° C. is preferable, and T _outlet is most preferably 393 ° C. to 397 ° C.

On the other hand, when the plastic is polypropylene, 350 ° C ≦ T _outlet ≦ 390 ° C. is preferable, and T _outlet is most preferably 380 ° C. to 387 ° C. In contrast, when the plastic is polystyrene, 340 ° C. ≦ T _outlet ≦ 380 ° C., and T _outlet is most preferably 355 ° C. to 365 ° C.

When the outlet temperature T _outlet of the molten plastic is less than (T0−40) ° C., the molten plastic does not store sufficient heat energy, so the time required for gasification in the vaporizer 4 becomes longer, or entrainment occurs. The product oil is mixed as an impurity, or the molten plastic is heated at a high temperature in the vaporizer 4 at a high temperature, which may cause scorching. On the other hand, the molten plastic outlet temperature T _outlet When the temperature exceeds (T0−10) ° C., the molten plastic is gasified before being supplied to the vaporizer 4, and the liquefied plastic can be supplied to the vaporizer 4 by a predetermined amount. There is a possibility of disappearing, which is not preferable.

As described above, the inner heating pipe 30 and the outer heating pipe 31 are melted by controlling the outlet temperature T _outlet of the molten plastic so that (T0−40) ° C. ≦ T _outlet ≦ (T0−10) ° C. As the plastic flows, the molten plastic can be uniformly and sufficiently heated to store sufficient heat energy in the molten plastic, and the molten plastic can be liquefied and vaporized with little resistance. It becomes possible to supply to the container 4.

  FIG. 6 is a schematic perspective view of the vaporizer 4.

  As shown in FIG. 6, the vaporizer 4 is formed by a tubular member 40 having a riverboat-like outer shape, the tubular member 40 has a plate-like ceiling portion 41, and is formed on the outer peripheral surface of the curved portion 40 a of the tubular member 40. Is provided with a heater 42, and the outer surface of the heater 42 is covered with a heat insulating material 43.

  The liquefied plastic is supplied to the vaporizer 4 from the outlet passage 36 of the multilayer heating unit 3.

  As shown in FIG. 6, the plastic liquid body 45 supplied into the vaporizer 4 from the outlet passage 36 of the multilayer heating unit 3 accumulates in the internal space defined by the curved portion 40 a of the riverboat-like tubular member 40. It is configured as follows.

  In order to improve the evaporation rate of the plastic liquid body 45, it is preferable that the area of the liquid surface of the plastic liquid body 45 is larger.

  Here, the tubular member 40 has a shape in which a cross-sectional shape of the curved portion 40a is cut out from a virtual circle having a radius R by a horizontal plane, and the upper end portion of the curved portion 40a is θ to the vertical direction from the center of the virtual circle. Is defined by the intersection of a plane extending at an angle of / 2, a plane extending at an angle of -θ / 2, and an imaginary circle, θ is set to 70 to 90 degrees, and the curved portion 40a It is preferable that the distance between the upper edge of the curved portion 40a and the bottom of the curved portion 40a is set to 350 mm or less.

  When the depth of the low-viscosity plastic liquid 45 supplied from the multilayer heating unit 3 is deep, cold water masses are generated in the plastic liquid 45 due to the low thermal conductivity, which is a general property of plastics. Therefore, it is preferable to reduce the depth of the plastic liquid body 45 and widen the liquid surface of the plastic liquid body 45, and θ is in the range of 70 degrees to 90 degrees from such a viewpoint. Set in.

  In the present invention, the depth of the plastic liquid body 45 in the tubular member 40 is preferably 200 mm to 350 mm.

  When the depth of the plastic liquid body 45 in the tubular member 40 exceeds 350 mm, a cold water mass may be generated in the plastic liquid body 45 and bumping may occur. On the other hand, the plastic in the tubular member 40 When the depth of the liquid material 45 is less than 200 mm, the portion in contact with the curved portion 40a becomes small. As a result, the flow of the plastic liquid material 45 inside the vaporizer during heating becomes small, and natural convection occurs. This is not preferable because the uniform heating is delayed due to heat, the plastic liquid 45 is heated without flowing, and the plastic liquid 45 may be burnt.

In the present invention, more preferably, the depth of the plastic liquid body 45 in the tubular member 40 is 250 mm to 300 mm.
On the other hand, the distance between the liquid surface of the plastic liquid body 45 and the ceiling of the tubular member 40 is preferably 100 mm to 200 mm. When the distance between the liquid level of the plastic liquid 42 and the ceiling of the tubular member 40 is 100 mm to 200 mm, the gas space can absorb the energy of bumping.

  FIG. 7 is a schematic view of the vaporizer 4, the cooler 5, and the oil component storage tank 6.

  As shown in FIG. 7, a reflux pipe 46 extending upward is attached to the ceiling portion 41 of the tubular member 40 constituting the vaporizer 4, and a reflux pipe 48 is connected via a connection portion 47. Yes. The downstream end of the reflux pipe 48 is connected to the cooler 5.

  As shown in FIG. 7, the cooler 5 includes a refrigerant pipe 50 through which the refrigerant circulates, and the refrigerant is supplied from the refrigerant supply port 51 into the refrigerant pipe 50 and discharged from the refrigerant discharge port 52. It is configured. In FIG. 7, what is indicated by reference numeral 53 is a gas recovery pipe for recovering hydrocarbon gas that has not been liquefied in the cooler 5 and sending it to a catalytic reactor (not shown), which will be described later. A gas recovery pipe 65 is connected, and a check valve 58 is provided in the gas recovery pipe 53 upstream of the connecting portion of the gas recovery pipe 65.

  The gas supplied from the vaporizer 4 to the cooler 5 flows along the refrigerant pipe 50 and is cooled, and the oil component in the gas is condensed and liquefied.

  As a result, the oil component in the gas supplied to the cooler 5 and the low molecular weight volatile organic compound gas that has not been oiled are connected to each other by the connection pipe 54 and the connection pipe 54 and It is sent toward the oil component storage tank 6 through the connecting pipe 56.

As shown in FIG. 7, the oil component storage tank 6 is divided into two compartments, and a portion extending above the lower compartment 6 b is separated from the upper compartment 6 a by a filter 60.
The connecting pipe 56 opens to the lower compartment 6b, and the liquefied component liquefied by the cooler 5 is first sent to the lower compartment 6b of the oil component storage tank 6 and has a specific gravity of 0.7 to 0.9. Impurities 68 having a specific gravity greater than that of the oily component are precipitated at the bottom of the lower compartment 6b.

  The oleaginized component from which impurities have been removed by precipitation and the low molecular weight volatile organic compound gas are further sent to a portion extending above the lower compartment 6b, and are not precipitated by the filter 60 but floated along with the oil. The fine impurities are filtered, and only the oily component and the low molecular weight volatile organic compound gas pass through the filter 60.

  As a result, the oil component is stored in the upper compartment 6 a of the oil component storage tank 6. The filtered impurities 68 are deposited at the bottom of the lower compartment 6b.

  On the other hand, the low molecular weight volatile organic compound gas that has passed through the filter 60 and sent into the upper compartment 6a is sent to the gas recovery pipe 65 connected to the ceiling of the upper compartment 6a.

  The gas recovery pipe 65 is connected to the gas recovery pipe 53, and tries to enter the gas recovery pipe 53 downstream of the connecting portion of the gas recovery pipe 65 through the gas recovery pipe 53 in an emergency. A flame arrester 59 is provided to stop the flame and prevent the occurrence of fire inside.

  The gas that has passed through the flame arrester 59 is sent to the catalytic reactor through the gas recovery pipe 53, detoxified, and released to the atmosphere.

  As described above, since the oily component from which impurities 68 having a larger specific gravity than the oily component are removed by precipitation is filtered by the filter 60, the load on the filter 60 can be reduced. become. In the present embodiment, a filter exchange port 61 for exchanging the filter 60 is provided.

The amount of oily component stored in the upper compartment 6a is monitored by an electronic liquid level gauge 62. When the amount of oily component stored in the upper compartment 6a reaches a predetermined amount, the discharge pump 63 is activated to The chemical component is taken out from the oil component storage tank 6.
In FIG. 7, what is indicated by reference numeral 66 is a cleaning port for removing impurities 68 precipitated in the lower compartment 6b and cleaning the inside of the lower compartment 6b, and also indicated by reference numeral 67. It is the oil quality confirmation side glass.

  The oil collected from plastic is usually lemon-colored (yellow) or mountain-brown with good transparency, so the oil is visually observed through the oil quality confirmation side glass 67, or the oil becomes cloudy or lemon-colored. However, when it is judged that the fluid is poor in transparency and has a pudding-like viscosity, the operation of the plastic oiling device is stopped due to temperature setting, excessive supply of raw materials, contamination with foreign matter, heater failure, etc. It is recognized that there is a failure that should have occurred. Therefore, the operator can visually check the recovered oil through the oil quality confirmation side glass 67 to stop the operation of the oil making device and repair the failure when the plastic oil making device fails. It becomes possible.

  The plastic continuous oil making apparatus according to the present embodiment configured as described above continuously oils plastic as follows.

  First, the cut plastic is put into the hopper 10 of the measuring instrument 1 by the operator.

  The plastic cut and put into the hopper 10 is temporarily stored and then delivered to the belt feeder 12, and the belt feeder 12 measures the weight of the plastic placed thereon. The belt feeder 12 is controlled by a computer so that the supply rate of the plastic is equal to the supply amount per unit time set by the operator based on the measured weight of the plastic.

  The belt feeder 12 drops the plastic thus transferred onto the extruder 2 through the opening 11.

  The extruder 2 includes a helical rod 22 having a spiral protrusion 21 formed on the surface thereof, and a cylinder 20 that accommodates the helical rod 22. The helical rod 22 receives a rotational force of an electric motor 24 from a bevel gear, The helical rod 22 is transmitted through a coupling and a bearing, and is configured to be rotationally driven. Therefore, the plastic supplied into the extruder 2 is conveyed through the extruder 2 by the helical rod 22 that is driven to rotate.

  A heater 26 covered with a heat insulating material 25 is wound around the outer peripheral portion of the extruder 2 except for the upstream portion of the cylinder 20, and the plastic is transported through the extruder 2 by the helical rod 22, and the heater is heated. It is configured to be heated by 26, melted in a jelly shape, and conveyed toward the multilayer heating unit 3.

  In the extruder 2, the molten plastic melted in a jelly shape is supplied from the upper part into the cylindrical inner heating tube 30 of the multilayer heating unit 3 through the inlet passage 28.

The molten plastic supplied to the upper part of the cylindrical inner heating pipe 30 of the multilayer heating unit 3 has an inlet temperature T _inlet of the molten plastic at the inlet of the multilayer heating unit 3.
(T0−45) ℃ ≦ T _inlet ≦ (T0−15) ℃
It is preferable to be heated by the heater 26 of the extruder 2. Here, T0 is the vaporization start temperature of the plastic.

  Fully heated plastic looses the carbon chain bond, and the radicals generated by breaking the loose part attack the part where the other carbon chain bond is loosened. As a result, it becomes a gas having 6 to 30 carbon atoms and gasifies.

However, when the inlet temperature T _inlet of the molten plastic is less than (T0−45) ° C., the viscosity of the molten plastic is too high, and the molten plastic can be uniformly supplied to the inner heating pipe 30 of the multilayer heating unit 3. It becomes difficult, and it becomes very difficult to uniformly heat the molten plastic by the multilayer heating unit 3, and as a result, it is gasified as a long molecule having 30 to 100 carbon atoms, and a high quality oil cannot be produced.

  On the other hand, when the inlet temperature of the molten plastic exceeds (T0−15) ° C., the molten plastic is gasified at the inlet portion of the multilayer heating unit 3, and the molten plastic is uniformly heated by the multilayer heating unit 3. Not only is this difficult, but the gasified plastic may flow back into the extruder 2, which is not preferable.

  The molten plastic is transferred from the upper part downward in the inner heating pipe 30, sent from the lower part of the inner heating pipe 30 into the outer heating pipe 31, and transferred from the lower part upward.

  A cylindrical first heater 32 is disposed inside the inner heating tube 30, and a cylindrical second heater 33 is disposed between the inner heating tube 30 and the outer heating tube 31. The molten plastic flowing from the upper side to the lower side in the inner heating tube 30 is heated from both sides by the first heater 32 and the second heater 33.

  Furthermore, since the cylindrical third heater 34 is disposed outside the outer heating pipe 31 of the multilayer heating unit 3, the molten plastic flowing in the outer heating pipe 31 from the lower side to the upper side is also the first. Heated from both sides by the second heater 33 and the third heater 34.

  In this way, the molten plastic flowing in the cylindrical inner heating tube 30 from the upper side to the lower side is heated from both sides by the cylindrical first heater 32 and the second heater 33, and the cylindrical outer side is heated. When flowing in the heating tube 31 from below to above, the molten plastic is heated from both sides by the cylindrical second heater 33 and the third heater 34. Therefore, the viscosity of the molten plastic, the viscosity of the molten plastic, so that the molten plastic flowing through the central portion of the cylindrical inner heating tube 30 and the molten plastic flowing through the central portion of the cylindrical outer heating tube 31 are heated to a predetermined temperature. The radial width of the multilayer heating unit 3 of the cylindrical inner heating pipe 30 and the cylindrical outer heating pipe 31 is set based on operating conditions such as the supply speed. The widths of the cylindrical inner heating tube 30 and the cylindrical outer heating tube 31 are set to 12 mm, for example.

  Thus, the radial width of the multilayer heating unit 3 of the cylindrical inner heating tube 30 and the cylindrical outer heating tube 31 is set, and when the molten plastic flows in the inner heating tube 30, the first Since the heater 32 and the second heater 33 are configured to be heated from both sides by the second heater 33 and the third heater 34 when flowing in the outer heating pipe 31, Heat can be efficiently transferred from the heater 32, the second heater 33, and the third heater 34 to the molten plastic.

  Accordingly, the molten plastic can be liquefied, and the plastic liquid 45 can be supplied from the outlet passage 36 to the vaporizer 4 with almost no resistance, and the plastic supplied to the vaporizer 4 can be supplied. Sufficient thermal energy can be accumulated in the liquid body 45.

  Furthermore, since it is not necessary to set the temperature of the first heater 32, the second heater 33, and the third heater 34 to an excessively high temperature, a part of the molten plastic flowing in the multilayer heating unit 3 is excessively heated. Thus, there is no fear of carbonization, and the power consumption can be greatly reduced as compared with the conventional case.

The heating temperature of the first heater 32, the second heater 33, and the third heater 34 provided in the multilayer heating unit 3 is the outlet temperature T when the molten plastic is sent from the outer heating pipe 31 to the outlet passage 36. _outlet
(T0−40) ℃ ≦ T _outlet ≦ (T0−10) ℃
It is preferable to be controlled so that Here, T0 is the vaporization start temperature of the plastic, and T _inlet <T _outlet .

When the outlet temperature T _outlet of the molten plastic is less than (T0−40) ° C., the molten plastic does not store sufficient heat energy, so the time required for gasification in the vaporizer 4 becomes longer, or entrainment occurs. The product oil may be mixed as an impurity, or may be heated in the vaporizer 4 at a high temperature, which may cause scorching. On the other hand, the outlet temperature T _outlet of the molten plastic is (T0 -10) When the temperature is higher than ° C, the molten plastic is gasified before being supplied to the vaporizer 4, and the liquefied plastic may not be supplied to the vaporizer 4 by a predetermined amount. .

When the molten plastic flows through the inner heating pipe 30 and the outer heating pipe 31 by controlling the outlet temperature T _outlet of the molten plastic so that (T0−40) ° C. ≦ T _outlet ≦ (T0−10) ° C., The molten plastic can be uniformly and sufficiently heated to store sufficient heat energy in the molten plastic, and the molten plastic is liquefied and supplied to the vaporizer 4 with almost no resistance. Is possible.

  As shown in FIG. 6, the plastic liquid 45 supplied into the vaporizer 4 from the outlet passage 36 of the multilayer heating unit 3 is an internal space defined by the curved portion 40 a of the tubular member 40 having a riverboat-like outer shape. Housed inside. A heater 42 is provided on the outer peripheral surface of the curved portion 40 a of the tubular member 40, and the outer surface of the heater 42 is covered with a heat insulating material 43.

  The plastic liquid body 45 sent from the multilayer heating unit 3 into the vaporizer 4 has a curved portion 40a so that the liquid level is the same as the upper edge of the curved portion 40a of the riverboat-like tubular member 40. Housed inside.

  The curved portion 40a of the tubular member 40 has a cross-sectional shape in which a virtual circle is cut out by a horizontal plane, and the upper end of the curved portion 40a has an angle of θ / 2 with respect to the vertical direction from the center of the virtual circle. The plane is defined by the intersecting line of the plane extending and the plane extending at an angle of −θ / 2 and the virtual circle, and θ is set to 70 degrees to 90 degrees.

  The plastic liquid body 45 is accommodated in the tubular member 40 so that the height position of the liquid surface thereof is substantially the same as the height position of the upper edge portion of the curved portion 40a.

  In the present embodiment, the distance between the upper edge of the bending portion 40a and the bottom of the bending portion 40a, that is, the depth of the plastic liquid body 45 accommodated in the bending portion 40a is preferably 200 mm to 350 mm.

  When the depth of the plastic liquid body 45 in the curved portion 40a of the tubular member 40 exceeds 350 mm, a cold water mass may be generated in the plastic liquid body 45 and bumping may occur. When the depth of the plastic liquid body 45 in the curved portion 40a of 40 is less than 200 mm, the portion in contact with the curved portion 40a becomes small. As a result, the plastic liquid body 45 inside the vaporizer 4 during heating is small. This is not preferable because the flow of the liquid becomes small, the promotion of uniform heating by natural convection is delayed, the plastic liquid 45 is heated without flowing, and the plastic liquid 45 may be burnt.

More preferably, the distance between the upper edge portion of the bending portion 40a and the bottom portion of the bending portion 40a, that is, the depth of the plastic liquid body 45 accommodated in the bending portion 40a is 250 mm to 300 mm.
On the other hand, the distance between the liquid surface of the plastic liquid body 45 and the ceiling of the tubular member 40 is preferably 100 mm to 200 mm. When the distance between the liquid level of the plastic liquid 42 and the ceiling of the tubular member 40 is 100 mm to 200 mm, the gas space can absorb the energy of bumping.

  The plastic liquid 45 heated by the heater 42 is gasified, and the inside of the reflux pipe 48 connected to the reflux pipe 46 via the connection pipe 47 and the reflux pipe 46 attached to the ceiling 41 of the vaporizer 4. And is supplied to the cooler 5.

  Here, since the reflux pipes 46 and 48 extend upward, when the heavy component is mixed in the gas component generated by the vaporizer 4, the heavy component returns to the vaporizer 4. The reflux pipes 46 and 48 also function as cooling pipes.

  The gas supplied to the cooler 5 flows along the refrigerant pipe 50 through which the refrigerant circulates and is cooled, so that the oil component in the gas is condensed and liquefied.

  As a result, the liquefied component obtained by liquefying the oil component in the gas supplied to the cooler 5 is sent to the oil component storage tank 6 through the connecting pipe 54 and the connecting pipe 56.

  On the other hand, the hydrocarbon gas that has not been liquefied in the cooler 5 is sent to the gas recovery pipe 53, passes through the check valve 58 and the flame arrester 59, is sent to a catalytic reactor (not shown), and is rendered harmless. Released into the atmosphere.

  The connecting pipe 56 opens to the lower compartment 6b of the oil component storage tank 6, and the oiled component that has been liquefied by the cooler 5 is first sent to the lower compartment 6b of the oil component storage tank 6 and has a specific gravity of 0. Impurities 68 having a specific gravity greater than that of the oiled components of .7 to 0.9 are deposited at the bottom of the lower compartment 6b.

  The oily component from which impurities are removed by precipitation is further sent to a portion extending above the lower compartment 6b, and the filter 60 filters fine impurities floating along with the oil without being precipitated. Only the oil component passes through the filter 60 and is stored in the upper compartment 6 a of the oil component storage tank 6. The filtered impurities 68 are deposited at the bottom of the lower compartment 6b.

  On the other hand, the hydrocarbon gas spontaneously volatilized from the light oil component in the oily component is sent to the gas recovery pipe 65 connected to the ceiling portion of the upper compartment 6a.

  The hydrocarbon gas sent to the gas recovery pipe 65 is sent into the gas recovery pipe 53, passes through the flame arrester 59, passes through the gas recovery pipe 53, is sent to the catalytic reactor, is rendered harmless, and is released into the atmosphere. Released.

  Thus, since the oil-ized component from which the impurity 68 whose specific gravity is larger than oil-ized component by precipitation is removed is filtered by the filter 60, the burden of the filter 60 can be reduced. Become.

  Thus, good quality oil having 6 to 30 carbon atoms can be stored in the upper compartment 6a, and the storage amount of the oil component in the upper compartment 6a has reached a predetermined amount by the electronic level gauge 62. If it is recognized, the discharge pump 63 is operated, and the oil component is taken out from the oil component storage tank 6.

  In this embodiment, the vaporizer 4 is formed by a tubular member 40 having a riverboat-like outer shape, and the plastic liquid material 45 supplied into the vaporizer 4 from the outlet passage 36 of the multilayer heating unit 3 is a riverboat-like tubular shape. The curved portion 40a of the tubular member 40 is configured such that a virtual circle having a radius R is cut out by a horizontal plane in the inner space defined by the curved portion 40a of the member 40. And the upper end of the curved portion 40a extends from the center of the virtual circle at an angle of θ / 2 with respect to the vertical direction, a plane extending at an angle of −θ / 2, and the virtual circle The plastic liquid body 45 is formed on the tubular member 40 such that θ is set to 70 degrees to 90 degrees and the depth of the plastic liquid body 45 is 200 mm to 350 mm. Since the plastic liquid body 45 is stored in the bent portion 40a, the depth of the plastic liquid body 45 is shallow. Therefore, when heated by the heater 42, a cold water mass is generated in the plastic liquid body 45, and bumping occurs effectively. In addition, since the liquid level of the plastic liquid body 45 accommodated in the curved portion 40a is sufficiently wide, the evaporation rate can be improved.

  Further, according to the present embodiment, the plastic melted in the extruder 2 passes from the inlet passage 28 connected to the downstream end of the extruder 2 to the upper part of the cylindrical inner heating pipe 30 of the multilayer heating unit 3. Is heated from both sides by a cylindrical first heater 32 disposed inside the inner heating tube 30 and a cylindrical second heater 33 disposed outside the inner heating tube 30. The inner heating pipe 30 is sent downward, and the lower part of the inner heating pipe 30 is sent into the outer heating pipe 31, and the cylindrical second heater 33 arranged inside the outer heating pipe 31 and the outer heating. An outlet passage attached to the upper part of the outer heating pipe 31, which is sent upward from the outer heating pipe 31 while being heated from both sides by a cylindrical third heater 34 disposed outside the pipe 31. 36 to vaporizer 4 Since it is configured to be supplied, heat can be efficiently transferred from the first heater 32, the second heater 33, and the third heater 34 to the molten plastic, and the molten plastic can be liquefied. It is possible to accumulate sufficient thermal energy in the plastic liquid body 45 so that the vaporizer 4 can selectively vaporize a good quality hydrocarbon gas having 6 to 30 carbon atoms and a low molecular weight. Since it is liquefied, the plastic liquid 45 can be supplied from the outlet passage 36 to the vaporizer 4 with almost no resistance.

  In addition, according to the present embodiment, when the molten plastic flows in the inner heating pipe 30, the first plastic 32 and the second heater 33 cause the second plastic 33 to flow in the outer heating pipe 31. Since the heater 33 and the third heater 34 are configured to be heated from both sides, the heat is efficiently converted from the first heater 32, the second heater 33, and the third heater 34 into molten plastic. Molten plastic flowing in the multilayer heating unit 3 because it is possible to transfer heat and therefore it is not necessary to set the temperature of the first heater 32, the second heater 33 and the third heater 34 to an excessively high temperature. Is excessively heated and there is no fear of carbonization, and the power consumption can be greatly reduced as compared with the conventional case.

  FIG. 8 is a schematic longitudinal sectional view of a multilayer heating unit 3 used in a plastic oiling apparatus according to another preferred embodiment of the present invention, and FIG. 9 is a schematic cross-sectional view taken along line BB in FIG. FIG.

  As shown in FIG. 8 and FIG. 9, three heating tubes 80, 81, 82 that are concentrically arranged and have a cylindrical shape are provided. Of the three heating tubes 80, 81, 82, the innermost heating tube 80 is formed by a cylindrical body 80a having a radius R5 and a cylindrical body 80b having a radius R6 (where R5 <R6 A space through which the plastic melt flows is formed between the cylindrical body 80a and the cylindrical body 80b.

  On the other hand, among the three heating tubes 80, 81, 82, the central heating tube 81 located at the center is formed by a cylindrical body 81a having a radius R7 and a cylindrical body 81b having a radius R8 (where R5 < R6 <R7 <R8), and a space through which the plastic melt flows is formed between the cylindrical body 81a and the cylindrical body 81b.

  Further, of the three heating tubes 80, 81, 82, the outermost outer heating tube 82 is formed by a cylindrical body 82a having a radius R9 and a cylindrical body 82b having a radius R10 (here, R5 <R6 <R7 <R8 <R9 <R10), and a space through which the plastic melt flows is formed between the cylindrical body 82a and the cylindrical body 82b.

    The inner heating pipe 80 communicates at its upper end with the inlet passage 28 connected to the downstream end of the extruder 2, communicates with the central heating pipe 81 at its lower end, and the central heating pipe 81 at its upper end. It communicates with the outer heating tube 82.

  As shown in FIG. 8, the outer heating pipe 82 communicates with the outlet passage 36 to the vaporizer 4 at the lower end thereof.

  As shown in FIGS. 8 and 9, a cylindrical first heater 82 is disposed inside a cylindrical body 80 a that constitutes the inner heating pipe 80, and a cylindrical body 80 b that constitutes the inner heating pipe 80. A cylindrical second heater 83 is disposed in the space between the cylindrical heating body 81a and the cylindrical body 81a, and the molten plastic flowing in the inner heating pipe 80 is cylindrical. One heater 82 and a cylindrical second heater 83 are configured to be heated from both sides.

  In the multilayer heating unit 3, a cylindrical third heater 84 is further provided in the gap between the cylindrical body 81 b constituting the central heating pipe 81 and the cylindrical body 82 a constituting the outer heating pipe 82. The molten plastic flowing in the central heating pipe 81 is configured to be heated from both sides by a cylindrical second heater 83 and a cylindrical cylindrical third heater 84. .

  Furthermore, in the multilayer heating unit 3, a cylindrical fourth heater 85 is disposed outside the cylindrical body 82b constituting the outer heating pipe 82, and the molten plastic flowing in the outer heating pipe 82 is cylindrical. The third heater 84 and the fourth cylindrical heater 85 are configured to be heated from both sides.

  In this way, the molten plastic flowing in the inner heating pipe 80 from the upper side to the lower side is heated from both sides by the first heater 83 and the second heater 84, and in the central heating pipe 82 from the lower side to the upper side. When flowing toward the lower side, the second heater 84 and the third heater 85 are heated from both sides, and when flowing inside the outer heating pipe 82 downward from the upper side, the third heater 85 and the third heater 85 are Since the four heaters 86 are heated from both sides, heat is efficiently transferred from the first heater 83, the second heater 84, the third heater 85, and the fourth heater 86 to the molten plastic, Molten plastic can be liquefied, sufficient thermal energy is accumulated in the plastic liquid 45, and the vaporizer 4 has 6 to 30 carbon atoms. It is possible to selectively vaporize a low-molecular-weight, high-quality hydrocarbon gas, and since the molten plastic is liquefied, the plastic liquid body 45 can be sent from the outlet passage 36 to the vaporizer 4 with almost no resistance. It becomes possible to supply to.

Also in this embodiment, the molten plastic supplied to the upper part of the cylindrical inner heating tube 80 of the multilayer heating unit 3 has an inlet temperature T _inlet of the molten plastic at the inlet of the multilayer heating unit 3.
(T0−45) ℃ <T _inlet <(T0−15) ℃
Preferably, the molten plastic is heated by the heater 26 of the extruder 2. Here, T0 is the vaporization start temperature of the plastic.

The heating temperature of the first heater 83, the second heater 84, the third heater 85, and the fourth heater 86 provided in the multilayer heating unit 3 is such that the molten plastic flows from the outer heating pipe 82 to the outlet passage 36. The outlet temperature T _outlet when it is sent is
(T0-40) ° C <T _outlet <(T0-10) ° C
It is preferable to be controlled so that Here, T _inlet <T _outlet .

  According to this embodiment, the multilayer heating unit 3 includes the cylindrical inner heating tube 80, the cylindrical central heating tube 81, and the cylindrical outer heating tube 82, and the cylindrical inner heating tube 80. The molten plastic flowing from above to below is heated from both sides by the first heater 83 and the second heater 84, and the molten plastic flowing from below to above in the central heating pipe 82 is The molten plastic that is heated from both sides by the heater 84 and the third heater 85 and flows from the upper side to the lower side in the outer heating pipe 82 is moved to both sides by the third heater 85 and the fourth heater 86. It is comprised so that it may be heated from. Accordingly, the molten plastic is uniformly heated and liquefied by the multilayer heating unit 3 and liquefied, and sufficient heat energy is stored, so that it can be gasified as desired by the vaporizer 4 and has 6 to 30 carbon atoms. It is possible to produce high quality oil with low molecular weight from plastic.

  FIG. 10 is a schematic perspective view of a vaporizer 4 used in a plastic oiling apparatus according to another embodiment of the present invention.

  As shown in FIG. 10, the tubular member 40 of the vaporizer 4 according to the present embodiment is a polygon 90 in which the cross-sectional shape of the curved portion 40 a approximates a circle (referred to as “approximate circle 90” in this specification). ) Is cut out by a horizontal plane.

  Also in this embodiment, the plastic liquid body 45 is stored in the curved portion 40a of the tubular member 40 so that the liquid level is located at the same height as the upper edge of the curved portion 40a of the riverboat-like tubular member 40. Therefore, the depth of the plastic liquid body 45 is shallow. Therefore, when the plastic liquid body 45 is heated by the heater 42, a cold water mass is generated in the plastic liquid body 45 and can effectively prevent bumping. In addition, since the liquid level of the plastic liquid body 45 stored in the curved portion 40a is sufficiently wide, the evaporation rate can be improved. Therefore, the plastic liquid accumulated in the internal space defined by the curved portion 40a of the river-boat-like tubular member 40 is gasified as desired to produce high-quality oil having a low molecular weight of 6 to 30 carbon atoms from the plastic. Is possible.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

  For example, in the embodiment shown in FIGS. 1 to 7, the vaporizer 4 is formed in a river boat shape by the tubular member 40, and the curved portion 40 a of the tubular member 40 has a virtual cross section having a radius R. A circle is cut out by a horizontal plane, and the upper end of the curved portion 40a forms an angle of -θ / 2 with a plane extending at an angle of θ / 2 with respect to the vertical direction from the center of the virtual circle. The plastic liquid body 45 is tubular and is defined by the intersecting line of the extending plane and the virtual circle, θ is set to 70 degrees to 90 degrees, and the plastic liquid body 45 has a depth of 200 mm to 350 mm. The curved portion 40a of the tubular member 40 of the vaporizer 4 is accommodated in the curved portion 40a of the member 40, and in the embodiment shown in FIG. Approximate circle However, it is not always necessary that the outer shape of the curved portion 40a of the tubular member 40 has a shape obtained by cutting out an imaginary circle or an arc of an approximate circle. The outer shape of the portion 40a is not particularly limited as long as it is a shape obtained by cutting an elliptical arc, but is a curved shape.

  1 to 7, the multilayer heating unit 3 includes a cylindrical inner heating pipe 30 and a cylindrical outer heating pipe 31, and the implementation shown in FIGS. In the aspect, the multilayer heating unit 30 includes the cylindrical inner heating pipe 80, the cylindrical central heating pipe 81, and the cylindrical outer heating pipe 82, but the cylindrical heating provided in the multilayer heating unit 30. The number of tubes is not particularly limited as long as it is 2 or more.

  In addition, in the embodiment shown in FIGS. 1 to 7, the multilayer heating unit 3 comprises a cylindrical inner heating tube 30 and a cylindrical outer heating tube 31, which is the implementation shown in FIGS. In the aspect, the multilayer heating unit 30 includes a cylindrical inner heating pipe 80, a cylindrical central heating pipe 81, and a cylindrical outer heating pipe 82, but the heating pipes 30, 31, 80, 81, 82 are provided. Is not necessarily formed in a cylindrical shape, as long as the cross section has a cylindrical shape such as an ellipse or a polygon. However, in order to allow the molten plastic to flow uniformly in the multilayer heating unit 3, a cylindrical heating tube formed by a smooth curve is preferable, and in order to allow the molten plastic to be heated uniformly, A cylindrical shape is preferred.

DESCRIPTION OF SYMBOLS 1 Meter 2 Extruder 3 Multi-layer heating unit 4 Vaporizer 5 Cooler 6 Oil component storage tank 6a Upper compartment 6b Lower compartment 10 Hopper 11 Metering opening 12 Belt feeder 20 Cylinder 21 Helical projection 22 Helical rod 24 Electricity Motor 25 Heat insulating material 26 Heater 28 Inlet passage 30 Inner heating tube 31 Outer heating tube 32 First heater 33 Second heater 34 Third heater 36 Outlet passage 40 River boat-like tubular member 41 Ceiling part 42 Heater 43 Insulating material 45 Plastic liquid 46 Reflux pipe 47 Connection section 48 Reflux pipe 50 Refrigerant pipe 51 Refrigerant supply port 52 Refrigerant discharge port 53 Bypass pipe 54 Connection pipe 55 Connection section 56 Connection pipe 57 Bypass pipe 58 Check valve 59 Flame arrester 60 Filter 61 Filter replacement port 62 Electronic liquid level gauge 63 Discharge pump 65 Gas recovery pipe 66 Cleaning port 67 Oil quality confirmation side glass 68 Impurity 80 Inner heating pipe 81 Central heating pipe 82 Outer heating pipe 83 First heater 84 Second heater 85 Third heater 86 Fourth heater 90 Approximate circle

Claims (6)

The plastic is heated and melted, the melted plastic melt is heated and liquefied, the liquefied plastic liquid is heated and vaporized, and the gas component of the vaporized plastic is cooled and oil A plastic continuous oiling device configured to separate into a component and a gas component,
A vaporizer that heats and vaporizes the plastic liquid body includes a tubular member having a riverboat-like outer shape, wherein the upper portion of the outer shape of the tubular member has a rectangular shape, and the lower portion of the outer shape is formed in a curved shape. The bending portion is formed so that the plastic liquid material is accommodated in the bending portion formed in a curved shape of the member, and the distance between the upper edge portion of the bending portion and the bottom portion of the bending portion is set to 350 mm or less. A plastic continuous oiling device characterized by being made.   The vaporizer is configured such that the height position of the liquid surface of the plastic liquid material substantially matches the height position of the upper edge of the curved portion of the tubular member. The continuous oil liquefaction equipment for plastics described   The curved portion of the tubular member is formed so that a distance between an upper edge of the curved portion of the tubular member and a bottom portion of the curved portion is 200 mm to 350 mm. Continuous plasticization equipment for plastics as described in 1.   The curved portion of the tubular member is formed so that a distance between an upper edge of the curved portion of the tubular member and a bottom portion of the curved portion is 250 mm to 300 mm. Plastic continuous oiling equipment.   5. The plastic continuous oil making apparatus according to claim 1, wherein an outer shape of the curved portion of the tubular member is formed by a smooth curve. A cross section of the curved portion of the tubular member has a shape obtained by cutting out a virtual circle by a horizontal plane, and an upper edge portion of the curved portion forms an angle of θ / 2 with respect to a vertical direction from the center of the virtual circle. 6. A plane extending in a straight line, a plane extending at an angle of −θ / 2 (θ is 70 degrees to 90 degrees), and an imaginary circle. The plastic continuous oil-ized apparatus of any one of these.

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