JP4593542B2 - Method for producing resin-based modifier and apparatus for producing resin-based modifier - Google Patents

Description

  The present invention melts and thermally decomposes a part of synthetic resin waste material by combustion to improve the properties of resins, rubber, etc., and resin-based reforming to produce wax-like substances used for inks, paints, pigments, etc. The present invention relates to an agent manufacturing method and a resin modifier manufacturing apparatus.

Conventionally, as a resin-based modifier manufacturing equipment that produces wax-like substances by melting and thermally decomposing synthetic resin waste consisting of multiple types of synthetic resins or resins containing carbon black and inorganic additives Various things have been proposed. (For example, Patent Documents 1 to 3)
Thereby, synthetic resin waste such as polyethylene resin can be processed as a raw material, and a wax-like substance can be produced for property modification of resin / rubber, etc., and for ink / paint or pigment.

  As shown in FIG. 5, the disclosed resin modifier manufacturing apparatus includes a bottomed cylindrical receiving tank T for storing a wax-like substance melt, and has a tank upper end opening 1b. And it is supported and provided by the support leg 1a.

  A cylindrical combustion basket 2 for heating and melting the raw material A such as synthetic resin waste material is integrally mounted and fixed in the tank upper end opening 1b of the reservoir tank T. A large number of air introduction holes 2 b are formed in the side wall of the combustion basket 2 in the thickness direction of the side wall so as to communicate the inside and the outside of the combustion basket 2.

  A closed box-shaped catalyst tank (deplasticization promoting basket) 4 is attached to the lower end opening 2a of the combustion basket 2 so as to close the lower end opening 2a from below. The catalyst tank 4 has a net-like part 4a whose entire wall is porous, and a metal catalyst for promoting deplasticization of the melt B, for example, a linear shape made of platinum or copper, in the catalyst tank 4. The catalyst 4b is filled so that the melt B can pass through.

  A cylindrical air balancer 5 for adjusting the amount of air supplied to the combustion basket 2 is installed at a predetermined interval from the outer periphery of the combustion basket 2 so as to cover the outer periphery of the combustion basket 2. An air introduction opening 5 a is provided in the lower part of the air balancer 5.

  In order to efficiently send the flammable hot gas G generated in the reservoir tank T into the combustion basket 2 between the reservoir tank T and the combustion basket 2, a communication pipe 9. Are installed along the vertical direction with respect to the outer wall of the reservoir tank T. Each communication pipe 9 is provided with a pump 10 for sending the gas from the reservoir tank T to the combustion basket 2 in order to promote the delivery of the hot gas G.

  A pipe-like heater 6 is installed at the inner bottom of the reservoir tank T as a heating means for raising the melting temperature of the wax-like substance C by electric heating. In addition, a temperature sensor 7 such as a bimetal or a thermocouple for detecting the melting temperature of the wax-like substance C is installed inside the reservoir tank T as temperature detection means.

  The heater 6 is provided with control means 8 such as a microcomputer for controlling on / off or proportional control of the heater 6 so as to keep the melt of the wax-like substance C at a predetermined temperature.

  In the lower part of the combustion basket 2, the rooster 3, which is a raw material tray for placing the raw material A and melting and pyrolyzing it, closes the lower end opening 2 a of the combustion basket 2 from above. These are attached to the peripheral wall in the combustion basket 2.

  In order to produce a wax-like substance in the production apparatus described above, first, as the raw material A, a combustible, for example, crosslinked polyethylene alone, or a mixture of a crosslinked polyethylene and a polyolefin such as non-crosslinked or low-crosslinked polyethylene is used. The raw material A is conveyed by the belt conveyor 11 and charged from the raw material charging hopper 12 onto the rooster 3 of the combustion basket 2 by a predetermined amount.

  Next, when the crosslinked polyethylene contained in the raw material A is ignited, the synthetic resin for producing the wax-like substance is thermally decomposed and melted, and the melt B is dropped from the rooster hole portion 3a and passes between the catalysts in the catalyst tank 4. Then, it falls into the reservoir tank T.

  At this time, the catalyst tank 4 and the receiving tank T gradually become deficient due to the disappearance of oxygen due to the burning of the crosslinked polyethylene, and the wax-like substance C thermally decomposed in the deficient state accumulates in the receiving tank T.

  As described above, the wax-like substance C that is melted and in a high heat state is partially vaporized in an oxygen deficient state to generate a combustible hot gas G. The hot gas G is sent into the combustion basket 2 through a communication pipe 9 provided between the reservoir tank T and the combustion basket 2.

  The communication pipe 9 is for efficiently sending the flammable hot gas G generated in the reservoir tank T into the combustion basket 2, and a plurality of them are connected to the outer wall of the reservoir tank T. A pump 10 that is installed along the vertical direction and feeds the gas from the reservoir tank T to the combustion basket 2 is provided in each communication pipe 9 in order to promote the delivery of the hot gas G. The hot gas G is mixed with the air introduced from the air introduction hole 2a of the combustion basket 2 in the combustion place of the raw material A sent into the combustion basket 2 and burned, and the melting of the raw material A is continued. . By configuring the apparatus in this way, it is necessary to supply thermal energy at the time of start-up, but thereafter, thermal energy is supplied independently.

JP 60-190494 A JP-A-10-128747 JP 2003-206373 A

  However, the above-described resin-based modifier manufacturing apparatus combusts a part of the synthetic resin waste, melts and pyrolyzes the remainder of the synthetic resin waste by the burned heat, and melts it from below the combustion furnace. The wax-like melt was dropped and stored in a receiving tank disposed below the wax-like melt. For this reason, the resin-based modifier stored in the reservoir tank is in a state in which impurities such as soot generated in the combustion basket and carbon black contained in the synthetic resin waste are taken into the interior. There was a problem that the purity of the product was lowered and the quality was lowered.

The present invention has been made in view of the above points. When a wax-like melt that melts and drops is dropped onto running water, it instantly solidifies into a thin film, and at this time, it is separated from impurities such as soot and carbon black. Since it exists as an individual, the inventors have obtained the knowledge that impurities can be reduced in the solidified resin-based modifier and have arrived at the present invention. The gist of the invention is that of a synthetic resin waste material in a combustion furnace. The combustion part is burned, the remainder of the synthetic resin waste is melted and pyrolyzed by the burned heat, the melted wax-like melt is dropped from the lower side of the combustion furnace, and the trapping part arranged below the In the resin-based modifier manufacturing apparatus that captures the resin-based modifier and collects the resin-based modifier, the capturing unit receives the molten resin-based modifier on flowing water, solidifies, and solidifies. collecting child a resin-based modifier in the running water of downstream An apparatus for manufacturing a resin modifier according to claim.

By dripping molten resin-based modifier into running water , it is solidified instantaneously, so impurities such as soot and carbon black generated by combustion are not taken into the modifier, and the modifier and impurities are not Since they exist as separate individuals, they can be easily separated. As a result, the obtained resin modifier has the effect of having a high purity.

The present invention can employ the following embodiments.
The resin-based modifier is recovered by filtering the water.
The water is flowing water supplied from a water tap.
The water is circulated.
The circulated water is purified by a filter.
By adopting any of these, the resin modifier can be easily recovered from running water .
In addition, an inert gas layer is formed between the combustion furnace and the capturing part. Thereby, it is possible to prevent the molten resin generated in the combustion furnace from burning (or secondary combustion) in the combustion furnace, and to increase the recovery rate of the resin modifier.

Hereinafter, the present invention will be described based on illustrated embodiments. In FIG. 1, 20 is a combustion part, 30 is a capture part.

The combustion unit 20 supplies oxygen or an oxygen-containing gas to the lower side of the combustion cylinder 21, a combustion cylinder 21 whose central axis is installed in the vertical direction, a rooster 22 disposed below the combustion cylinder 21 at a predetermined interval, and And an oxygen supply nozzle 23 to be used. A cylindrical outer wall 25 is disposed on the outer surface of the combustion cylinder 21 at a predetermined distance, and the outer surface of the combustion cylinder 21 is isolated from the external atmosphere. The combustion section 20 and the outer wall 25 constitute a combustion furnace.
An exhaust device (not shown) is provided on the upper portion of the outer wall 25, and exhaust gas generated when the raw material A is burned by oxygen or an oxygen-containing gas supplied by the oxygen supply nozzle 23 is processed.

  If necessary, a cover 24 is covered above the combustion cylinder 21 so that the rod-shaped raw material A disposed inside the combustion cylinder 21 does not burn inside the combustion cylinder 21. Further, the oxygen supply nozzle 23 may be of the same structure as the ejection nozzle shown in FIG.

  A rod-shaped raw material A is arranged in the combustion cylinder 21, one end of the raw material A is exposed from the lower part of the combustion cylinder 21, arranged on the rooster 22, and supplied from an oxygen supply nozzle 23 or oxygen-containing gas With the help of the above, a part of the raw material A is combusted, and a part of the raw material A is melted and pyrolyzed by the combustion heat, and a melted melt B is generated and dropped from below the combustion part 20.

The catcher 30 is installed at a position below the rooster 31, an eaves 31 that is inclined below the rooster 22, a water supply port 33 that supplies water 32 to the eaves 31 at a position above the inclination of the eaves 31, and an inclination below the eaves 31. A basin 34 that filters the flowing water 32 flowing through the basin 31, a water tank 35 that is installed at a position below the basin 34 and that receives water leaking from the basin 34, and water in the water tank 35 is supplied to the water supply port 33 through the pipe 36. It comprises a pump 37 that supplies running water 32.

Moreover, by adopting the trapping unit 30 as described above, the melt B generated in the combustion unit 20 is immediately cooled by dropping into the running water 32 on the basket 31 to become a solid resin modifier, It is transported and captured by the eaves 34 by the flow of running water 32. Therefore, the resin-based modifier captured by the basket 34 can be easily collected by the basket 34, and further cooled immediately by running water to become a thin film resin modifier. For this reason, it is not possible to generate a large lump by laminating one after another at the drop point. Thereby, impurities such as soot are hardly mixed in the solid resin modifier, and an excellent resin modifier that can easily remove impurities by washing with water or the like can be obtained.
At this time, a filter 38 is inserted in any of the paths between the water supply ports 33 from below the dredging 34, for example, in the middle of the pipe 36, and the dredging etc. are removed from the circulating flowing water 32 to be cleaned. It is desirable to prevent recontamination of the product B ′ trapped in

The resin-based modifier manufacturing apparatus manufactures a resin-based modifier under the following conditions, for example.
Inner diameter of combustion cylinder 21: 75 mmφ, raw material A: cross section 45 × 45 mm, length 20 cm, inert gas supply amount: nitrogen 2 liters / minute, width 45 mm, air gas supply amount: 2.5 liters / minute, combustion cylinder The distance between the lower end of 21 and the rooster 22: 50 mm
As a result, the burning polyethylene wax dropped from the combustion furnace was immediately extinguished in the inert gas layer V, and the yield when the resulting resin-based modifier was pressure filtered at 200 ° C. was 95%. there were.

For comparison, when the resin modifier is manufactured by replacing the trap 30 with the reservoir tank T shown in FIG. 5 above, the yield when filtered under pressure at 200 ° C. is 75%. It was.
Thus, this invention has the outstanding effect which can reduce the impurity contamination degree contained in the resin-type modifier.

FIG. 3 shows another embodiment of the present invention. Compared with the embodiment shown in FIG. 1, the trap 31 is disposed so as to be inclined below the rooster 22, and the tilt of the rod 31 is shown. The point which is comprised with the water tap 39 which supplies the running water 32 to the coffin 31 in the upper position differs. Thereby, the running water of fresh water is constantly supplied from the water tap 39, and the pump 37, the filter 38, and the like can be reduced. Other configurations are the same as those shown in FIG. 1, and their functions are also the same.

FIG. 4 shows still another embodiment of the present invention, which is different from the embodiment shown in FIG. 1 in that a gas supply unit 40 is disposed between the combustion unit 20 and the capturing unit 30. The other parts are the same as those shown in FIG. 1, and their functions are also the same.
The gas supply unit is supplied with an inert gas from an inert gas supply device (not shown), and ejects the gas between the combustion unit 20 and the capturing unit 30, and a part of the atmosphere layer therebetween is brought into an inert gas state. To do.

The combustion unit 20 and the capturing unit 30 are arranged apart from each other in the vertical direction, and when an air layer K containing oxygen exists between them, the resin system generated by melting and pyrolysis in the combustion unit 20 The modifier may fall while continuing to burn from the combustion unit 20 to the capturing unit 30 or while performing secondary combustion. However, if the inert gas layer V is formed below the rooster 22 due to the presence of the gas supply unit 40, the resin-based modifier falling while burning from the combustion unit 20 can be extinguished.

As the ejection nozzle used in the gas supply unit 40, for example, one having the same structure as the ejection nozzle shown in FIG. 2 can be used.
In addition, in the embodiment of FIG. 4, the inert gas released from the gas supply unit 40 is located directly below the combustion unit 20 in a direction crossing the central axis of the combustion unit 20, preferably with respect to the central axis. It flows in a strip shape (laminar flow state) in the orthogonal direction, that is, in the horizontal direction. At this time, when the range immediately below the combustion unit 20 is wide and one gas supply unit 40 cannot make the entire range immediately below the combustion unit 20 into the inert gas layer V, two gas supply units 40 are provided. As described above, the inert gas may be allowed to flow in the horizontal direction. Further, the gas supply units 40 may be arranged in multiple stages. In addition, each of the plurality of gas supply units 40 can be set to have different ejection directions.

  Thus, in the case of the present embodiment, since the inert gas layer V is formed at a position immediately below the combustion part 20, the resin-based reforming that drops while burning from the combustion part 20 by this inert gas layer V. The quality agent can be immediately extinguished, the resin-based modifier disappeared by combustion can be reduced, and the production yield of the resin-based modifier can be increased.

For comparison, the resin recovery rate of the resin modifier in FIG. 1 in the above was 68%, but in the present example, it was 73%. However, the resin recovery rate (%) is (weight of recovered modifier) ÷ {(weight of waste material input)-(weight of internal semiconductive layer)-(weight of external semiconductive layer)} x 100 Represents what is defined.
Thus, the Example of this invention has the outstanding effect which can prevent the secondary combustion of the resin-type modifier produced | generated and can raise a recovery rate.

  In the above-described embodiment, the case where the gas supply unit 40 uses an ejection nozzle as shown in FIG. 2 is described. However, the gas supply unit 40 in the present invention is simply 1 to 1 having one ejection hole. A plurality of ejection nozzles may be used.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 2 is a perspective view of some parts used in FIG. 1. The principal part cross-section explanatory drawing which shows the other Example of this invention. The principal part cross-section explanatory drawing which shows the further another Example of this invention. The principal part cross-sectional explanatory drawing of the resin-type modifier manufacturing apparatus which shows an example of the past.

Explanation of symbols

20 Combustion part 21 Combustion cylinder 22 Rostor 23 Oxygen supply nozzle 24 Lid 25 Outer wall 30 capture part 31 樋 32 Flowing water 33 Water supply port 34 籠 35 Water tank 36 Pipe 37 Pump 38 Filter 39 Water tap 40 Gas supply part A Raw material B Melt B ' Product C Waxy substance G Hot gas K Air layer T Reservoir tank V Inert gas layer

Claims (5)

A part of the synthetic resin waste material is burned in the combustion furnace, and the remaining heat of the synthetic resin waste is melted and pyrolyzed by the burned heat, and the resin-based modifier melted from below the combustion furnace in a molten state. In the resin-based modifier manufacturing apparatus that captures the resin-based modifier by a trapping unit that is dropped and disposed under the trapping part, and collects the resin-based modifier, the trapping unit is in a molten state of the resin-based modifier. An apparatus for producing a resinous modifier characterized by receiving and solidifying a quality agent on running water and collecting the solidified resinous modifying agent downstream of the running water .   The apparatus for producing a resinous modifier according to claim 1, wherein the recovery of the resinous modifier is performed by filtering the water. The apparatus for producing a resin modifier according to claim 1 or 2 , wherein the water circulates. The apparatus for producing a resin modifier according to claim 3 , wherein the circulated water is purified by a filter. The apparatus for producing a resin-based modifier according to any one of claims 1 to 4 , wherein an inert gas layer is formed between the combustion furnace and the capturing unit.

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