KR20060083474A - Recycling system of the dry process for waste mulching vinyl - Google Patents

Abstract

The present invention relates to an pulverized pyrolysis melting apparatus for recycling waste plastics for agriculture, and more specifically, to remove surface cleaning non-flammable foreign matters of up to 20% except for foreign matters that are naturally separated during crushing. The waste vinyl is then formed into a primary heating treatment unit of a combustion heating type and a secondary heating treatment unit of an electrothermal heating type to obtain a gel melt that is a raw material of a recycled product. It is about.

Agricultural waste vinyl, which can be found anywhere in rural fields, is a factor that degrades agricultural productivity by devastating soil and is not smoothly collected.

In general, when looking at the recycling method of waste vinyl, almost 50% of the collected waste agricultural vinyl, especially mulching, is collected by mixing it with foreign substances such as soil.In order to recycle it, a wet process of cleaning and removing the foreign substance is adopted. In this case, there is a problem in that the process is complicated and the processing cost is increased due to the water and related equipment used.

Therefore, in the present invention, it is possible to expect the direct and indirect ripple effect by improving the strength of the recycled product and increasing the recycled ratio by making the melt in a gel state by using a dry process without technically removing the cleaning process. To solve environmental pollution problem.

Pyrolysis melter, primary heat treatment unit, secondary heat treatment unit, drive unit, gas collector, inlet unit, cylinder, twin skew, cyclone, blower

Description

Recycling system of the dry process for waste mulching vinyl

1 is a flow chart showing a waste vinyl recycling process to which the pyrolysis melting apparatus of the present invention is applied.

2 is a process diagram of the pyrolysis melting apparatus of the present invention

Figure 3 is a state diagram showing the front arrangement of the pyrolysis melting apparatus of the present invention

Figure 4 is a state diagram showing a planar arrangement of the pyrolysis melting apparatus of the present invention

Figure 5 is a state diagram showing the front arrangement of the conventional pyrolysis melting apparatus

*** Explanation of symbols for main parts of drawing ***

1: pyrolysis melting apparatus 2: primary heat treatment unit

3: secondary heat treatment unit 4: exhaust unit

5,15: drive part 6,16: input part

7, 17: gas collector 8, 18: melting part

9,19: heating section 10,20: drive motor

11: reducer 12,22: cylinder

13,23: double screw 14: combustion chamber

The present invention relates to an pulverized pyrolysis melting apparatus for recycling waste plastics for agriculture, and more specifically, to remove surface cleaning non-flammable foreign matters of up to 20% except for foreign matters that are naturally separated during crushing. The waste vinyl is then formed into a primary heating treatment unit of a combustion heating type and a secondary heating treatment unit of an electrothermal heating type to obtain a gel melt that is a raw material of a recycled product. It is about.

Wherever you look in rural fields, the waste vinyl can be easily found. The waste vinyl degrades the soil, which greatly reduces agricultural productivity and is not smoothly collected.

This is because technically collected waste vinyl is not easily recycled, so almost 50% of collected agricultural waste vinyl, especially mulching, is foreign matter such as soil, and the process currently used to recycle it is water to remove it. It's a wet process.

However, the soil on the waste vinyl is not easily separated even if it is washed, so it goes through the third stage of cleaning as shown in <Figure 1> (cited by the Korea Environmental Resources Corporation). The associated devices add complexity to the process and increase processing costs.

                           <Figure 1>

In addition, as shown in <Figure 2> (represented by Korea Environmental Resources Corporation), which shows the amount of waste vinyl produced and collected, the amount of waste collected is increasing. At this time, the collection amount was 64.673 tons, but about 30% of the actual collection amount is foreign matter such as soil, and the collection amount is estimated to be 45,000 tons.

In 2001, which was directly affected by the abolition of waste vinyl collection compensation in 1999, 288,000 tons of agricultural waste plastics were collected from all over the country, of which only 121,000 tons (51%) were collected and properly treated, while the remaining 49% (117,000 tons) were collected. Illegal incineration, landfill or neglect.

That is, about half of the waste vinyl for agriculture is discarded in the field. Waste vinyl embedded in the soil inhibits the circulation of moisture and air and propagation of useful microorganisms, which further degrades the soil and reduces agricultural productivity.

In addition, the shortage of treatment facilities compared to the amount of waste vinyl generated has been pointed out as an urgent problem to be solved. The amount of stock of agricultural waste vinyl collected so far has reached 328,000 tons. The amount of waste vinyl present in the waste disposal system is only 25% of the target collection target of 128,000 tons of waste vinyl in 2002.

As shown in <Figure 3> (cited by Korea Environmental Resources Corporation), the total generation is expected to continue to increase in 2004, and only 151,000 tons, or 59% of 261,000 tons, will be collected.

In particular, the recycling of collected waste vinyl is currently operating at a loss of 10,000 tonnes of waste vinyl, with the cost of recycling reaching 200,000 won.However, the capacity of four treatment plants nationwide including Cheongju, Andong, Damyang, and Sihwa Is only 21,000 tons per year, and 20,000 ~ 30,000 tons of waste vinyl is accumulated in the yard of reclaiming works every year. (Quotation-Korea Environmental Resources Corporation)

<Picture 2> <Picture 3>

In addition, subsidies were collected for waste vinyl collection three to four years ago in light of the fact that the waste plastic waste problem discarded after farming in rural areas of Korea is becoming a serious social problem. Although it was collected, these days, subsidies have been eliminated, and collection is not done in a timely manner.

In addition, during summer storms and heavy snowfall in winter, large quantities of waste vinyl for the plastic house are discharged at once, and approximately 40,000 tons of waste vinyl are buried in the ground, even if estimated roughly.

The waste vinyl buried in the ground and left in the soil is hardly decomposed and it blocks the flow of water and air and blocks the flow of microorganisms in the soil, which further depletes the soil. Hydrogen chloride gas and the like are known to cause air pollution.

As described above, the present invention adopts a dry process to solve the problems of the conventional wet process of recycling waste vinyl, thereby eliminating the washing process of waste vinyl and attaching a surface of up to 20% except for foreign matters that are naturally separated from the crushing process. Waste vinyl is formed into a primary heat treatment part of a combustion heating type and a secondary heat treatment part of an electrothermal heating type by pyrolysis melting and recycling it while allowing non-combustible foreign substances as it is. It is intended to be used as a kind of aggregate or binder by mixing completely into the molten raw material in a state.

Looking at the configuration of the present invention with the accompanying drawings to solve the technical problem as described above are as follows.

1 is a flowchart illustrating a waste vinyl recycling process to which the pyrolysis melting apparatus 1 of the present invention is applied, FIG. 2 is a process diagram of the pyrolysis melting apparatus 1 of the present invention, and FIG. 3 is a pyrolysis melting apparatus of the present invention ( Fig. 4 is a state diagram showing the frontal arrangement of 1), Fig. 4 is a state diagram showing the planar arrangement of the pyrolysis melting apparatus 1 of the present invention, and Fig. 5 is a state diagram showing the frontal arrangement of the conventional pyrolysis melting apparatus.

As shown in FIG. 1, the pyrolysis melting apparatus 1 of the present invention selects a dry process rather than a conventional wet process, collects waste vinyl containing foreign substances such as soil by a crane, and shreds them in a crusher to naturally separate the foreign substances. After the removal, the waste vinyl was introduced using a feeder such as a conveyor, and thermally decomposed to a temperature of 200 to 300 ° C. in a primary heating treatment unit of a combustion heating type and simultaneously melted in a gel state, and the primary heating treatment unit 2 The gel melted in the gel state is discharged to the secondary heat treatment part 3 of the electrothermal heating type, and the organic materials mixed with the waste vinyl having the uneven property or the waste plastic and the foreign substances are homogeneous (homegeneous). ) To the gel state, which is the raw material of the phase.

Then, the raw material of the gel (gel) is supplied to a molding machine to produce injection-molded recycled products (such as water supply meter protection container, blind braille block).

Above all, the present invention is registered in the Republic of Korea Registered Utility Model Publication No. 22031 (Registration date February 16, 2001), No. 22033 (Registration date February 16, 2001) and No.185193 (Registration date) Based on the technology of March 29, 2000), after the long-term research and experiment, the progressive improvement, as shown in Figure 5, the drive unit 300 and the drive unit having a drive motor 310 and a reducer 320 as shown in FIG. The melted portion 200 of the cylinder 210 having the twin screw 220 for heating and melting the waste vinyl introduced by the 300 and the exhaust portion 400 for discharging the exhaust gas generated from the melted portion 200. In the pyrolysis melting apparatus 100 for treating and recycling the waste vinyl, waste synthetic resin and foreign matters buried therein together;

Pyrolysis melting apparatus (1) comprising a primary and secondary heat treatment unit (2) (3) consisting of a combustion heating type of the combustion chamber (14) and a heat transfer heating type of the electric heater (24), which are insulated with fireproof insulation. In addition, the exhaust gas discharged to the gas collectors 7 and 17 of the primary and secondary heat treatment units 2 and 3 is sent to the combustion chamber 14 of the primary heat treatment unit 2 and sensible heat. Using an exhaust unit 4 which is dried by using the exhaust gas and exhausts moisture after exhausting moisture while cooling and condensing the exhaust gas containing moisture,

The primary heat treatment unit (2) has a drive unit (5) consisting of a drive motor (10) and a reducer (11), an inlet (6) for receiving waste vinyl, and an inlet (6) for collecting exhaust gas. The gas collector 7 and the waste vinyl are melted by the twin screws 13 embedded in the cylinder 12 to heat the melted portion 8 and the cylinder 12 and include a portion of the cylinder 12 therein. It consists of a heating unit (9) consisting of a combustion chamber (14), by using a burner (14a) as a heat source to initially increase the temperature of the combustion chamber 14 and using the sensible heat of the pyrolyzed gas in a steady state as an auxiliary heat source Reuse and drying and pyrolyzing the waste vinyl,

The secondary heat treatment unit 3 receives the melt of the gel state of the primary heat treatment unit with the driving unit 15 of the driving motor 20 and moves to one side of the cylinder 12 of the primary heat treatment unit 2. A gas collector 17 for collecting the exhaust gas and the double screw 23 in which the melt in the gel state is embedded in the cylinder 22 having the formed input part 16 and the input part 16 therein. It consists of a heating unit (19) consisting of a molten portion 18 to be melted again to the furnace and a heat transfer heater (24) containing a portion of the cylinder (22) therein, the heat source of 300 kW as a heat source Using a heater 24 to homogeneously treat the gel molded by the primary heat treatment unit 2,

The exhaust part 4 sends the exhaust gas containing moisture to the cyclone 27 through the exhaust pipe 26 connected to the combustion chamber 14 to discharge the moisture while cooling and condensing it, and then exhausts the primary and secondary heating. The exhaust gas is sent back to the combustion chamber 14 of the primary heat treatment unit by the exhaust pipe 25 connected to the gas collectors 7 and 17 formed in the processing units 2 and 3 to assist in heat-melting the waste vinyl. It is characterized in that the blower 28 is installed and configured to be used as.

Looking at the embodiment of the primary and secondary heat treatment unit (2) (3) of the present invention pyrolysis melting apparatus 1 configured as described above are as follows.

<Example 1>

The length of the cylinder 12 of the primary heat treatment unit 2 is 3000 mm, the outer diameter is 480 mm, and the twin screws 13 and the twin screws 13 which are heat treated after processing SACM steel (Al-Cr-Mo alloy steel) are processed. The driving motor 10 to be driven is 75kW / 100Hp, the rotation speed is 20rpm, and the capacity of the burner 14a is 15.5 l / hr for diesel oil at elevated temperature and 8 l / hr in the normal state.

<Example 2>

A pair of heat treated and heat treated SACM steel (Al-Cr-Mo alloy steel) using a 300 kW electric heat heater 24 as the heat source of the secondary heat treatment part 3 and a cylinder 22 having a length of 2000 mm and an outer diameter of 480 mm. The drive motor 20 which drives the screw 23 and the said double screw 23 is 45 kW / 60 Hp, and is set as the rotation speed 30 rpm.

Looking at the operation of the present invention configured as described above are as follows.

The pyrolysis melting apparatus 1 of the present invention uses a method of injecting waste vinyl without a separate drying process to discharge gas generated through drying and pyrolysis in the primary heat treatment unit 2 to the exhaust pipe 25. The amount of power consumed is greatly reduced along with the overall load, and the gas generated from the secondary heat treatment unit 3 is also sent back to the combustion chamber 14 through the exhaust pipe 25 so that it can be dried using sensible heat, thereby using heat quantity. Improved.

In addition, the present invention collects waste vinyl containing foreign matter such as soil by a crane and shredded in a crusher to remove the foreign matter to be naturally separated, and then put into the apparatus of the present invention to thermally decompose waste vinyl at a temperature of 200 ~ 300 ℃ and At the same time, it melts in a gel state, and since most of the waste vinyl and other organic substances in the pyrolysis process are converted into carbides and low molecules, the molten mixture becomes black and pyrolyzes at a higher temperature of 400 ~ 500 ℃. If a large amount of tar and oil is produced, most of the above 700 ℃ gas is gasified and can not be made into a molten raw material of the gel (gel) state.

That is, organic materials mixed with waste vinyl, waste plastic, and foreign substances, which are thermally decomposed by the primary heat treatment unit 2 of the present invention, are homogeneous (homegeneous) by the secondary heat treatment unit 3. It converts into gel state, which is a raw material of, and at the same time plays a role of supplying homogeneous black pigment using free carbon component.

In addition, the present invention takes the form of a double screw (13) 23 and a cylinder (12) (22) made of a hard alloy, and while heating the periphery of the cylinder (12) (22) while thermally decomposing waste vinyl It melts the waste vinyl and finely grinds the inorganic foreign matters such as soil and stone to distribute uniformly in the melt.

In other words, it does not clean the waste vinyl and recycles it in a state that can be used as a raw material. In this process, flammable gas, a byproduct of pyrolysis, is generated. By recovering and supplying it to the pyrolysis apparatus, that is, the combustion chamber 14, it can be used as a pyrolysis heat source.

In other words, by using pyrolysis and melting waste vinyl using waste heat (sensible heat remaining in the gas), the use of power such as fuel or electric power can be reduced.

As described above, according to the present invention, the gas collected using the gas collectors 7 and 17 formed together with the input parts 6 and 16 of the primary and secondary heat treatment parts 2 and 3 is blower 28. Gas is discharged to the exhaust pipe 25 connected to the exhaust pipe 25 and the sensible heat remaining in the gas is returned to the combustion chamber 14 of the primary heat treatment unit 2 for recycling. ) To reduce the amount of air pollutants (dioxin, CO, NOx, etc.) generated during the pyrolysis process by discharging and exhausting moisture while cooling and condensing the exhaust gas containing moisture through the cyclone (27) connected to the will be.

The present invention allows 20% of foreign substances, such as soil, attached to the surface to be cleaned without washing the waste vinyl while grinding them, thereby reinforcing the strength of the recycled product, and producing a gel which is an injection molding material. It can be commercialized into a variety of products (such as water supply meter protection bottle, blind braille block, etc.), and it can be used for air pollutants (dioxin, CO, NOx, etc.) that can be generated during pyrolysis, melting, and production process. It has the effect of ensuring safety for the end product is harmless to the human body.

Claims (1)

It consists of a driving part having a drive motor and a speed reducer, a heating melting part of a cylinder with a double screw for heating and melting the waste vinyl introduced by the driving part, and an exhaust part for discharging the exhaust gas generated in the melting part. A pyrolysis melting apparatus for treating and recycling a synthetic resin and foreign matters buried therein; The primary and secondary heat treatment units composed of a combustion heating type of a combustion chamber insulated with fireproof insulation and an electrothermal heating type of an electric heater are constituted by one pyrolysis melting apparatus, and the gas of the primary and secondary heating treatment units is The exhaust gas discharged to the collector is sent to the combustion chamber of the primary heat treatment unit and dried using sensible heat, and the exhaust gas is exhausted after exhausting moisture while cooling and condensing the exhaust gas containing water, The primary heat treatment unit is melted by a driving unit consisting of a drive motor and a reducer, an input unit receiving waste vinyl, a gas collector having the input unit and collecting exhaust gas, and a double screw embedded in the cylinder. It consists of a heating section consisting of a combustion chamber that heats the cylinder and the cylinder and includes a portion of the cylinder therein, using a burner as a heat source to initially increase the temperature of the combustion chamber and as an auxiliary heat source by using the sensible heat of pyrolyzed gas in a steady state. Reuse and drying and pyrolyzing the waste vinyl, The secondary heat treatment unit receives the melt of the gel state of the primary heat treatment and the drive unit of the drive motor, the inlet formed on one side of the cylinder of the primary heat treatment unit and the inlet has an exhaust gas therein. Heat source consisting of a gas collector to collect and the melted part of the gel (melt) melts again with a double screw built into the cylinder and a heat transfer part that heats the cylinder and includes a portion of the cylinder therein. By using a 300 kW electrothermal heater to homogeneously melt the gel (gel) formed by the primary heat treatment, The exhaust unit sends the exhaust gas containing moisture to the cyclone through the exhaust pipe connected to the combustion chamber to exhaust the moisture while cooling and condensing it, and then exhausts the exhaust gas through the exhaust pipe connected to the gas collectors formed in the primary and secondary heat treatment units. A fine-pulverization pyrolysis melting apparatus for recycling the waste vinyl, characterized in that the blower is sent to the combustion chamber of the primary heat treatment unit to install the waste vinyl to be used as an auxiliary heat source in heating melting.

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