KR20060039246A - Recycling system of waste paint and waste paint drum using thermal decomposition - Google Patents

Abstract

The present invention relates to a recycling system for a waste paint and a waste paint container by a pyrolysis method and a recycling method thereof, wherein the system according to the present invention is a shuttle kiln pyrolysis chamber for pyrolyzing waste paint by heat supplied from an auxiliary burner (14). 10; A heat exchanger 20 connected to an outlet of the pyrolysis chamber 10 to lower the temperature of the decomposition gas discharged from the pyrolysis chamber 10 by air cooling; A condenser 30 connected to the heat exchanger 20 to condense the decomposition gas introduced from the heat exchanger 20 by cooling water; It is characterized in that the storage tank 40 is connected to the condenser 30 is collected and the regeneration oil obtained by condensing in the condenser is collected.

In addition, the heat exchanger 20 is provided with a first circulation portion 21 for circulating the heated air used when lowering the temperature of the cracked gas into the pyrolysis chamber 10, and remains without condensation in the condenser 30 A second circulation portion 31 for circulating cracked gas into the pyrolysis chamber 10 is installed.

In addition, the recycling system and waste recycling method of the waste paint and the waste paint canister by the pyrolysis method according to the present invention by treating the waste paint and the waste paint can be thermally decomposed to produce the regeneration oil generated from the incineration residues in the existing method Secondary pollution can be prevented, and the treatment facility can be miniaturized, thereby reducing the initial facility investment cost.

In addition, by using the waste heat generated in the heat exchanger to assist the heating of the pyrolysis chamber can reduce the amount of fuel used to expect energy saving effect, and also because it is pyrolyzed at low temperature it is possible to obtain a high quality scrap.

Waste Paint, Waste Paint Can, Pyrolysis, Incinerator, Shuttle Kiln

Description

Recycling system of waste paint and waste paint container by pyrolysis method and its recycling method {RECYCLING SYSTEM OF WASTE PAINT AND WASTE PAINT DRUM USING THERMAL DECOMPOSITION}             

1 is a configuration diagram schematically showing a recycling system of waste paint and waste paint buckets by the pyrolysis method according to the present invention,

2 is a schematic block diagram showing a shuttle kiln pyrolysis chamber according to the present invention,

3 is a schematic diagram illustrating a heat exchanger according to the present invention;

4 is a schematic configuration diagram of a condenser according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: pyrolysis chamber 11: inlet

                 12: cart drive device 13: bogie

                 14: auxiliary burner 15: blower

                 20: heat exchanger 21: first circulation part

                 30: condenser 30a, 30b, 30c: first, second, third condenser

                 31: second circulation portion 32: cooling fan

                 40: storage tank

The present invention relates to a recycling system of waste paint and a waste paint container by pyrolysis and a recycling method thereof, and more particularly to providing a pyrolysis chamber of a shuttle kiln-type simple structure and a heat exchanger and a condenser connected to the pyrolysis chamber. , Pyrolyze the waste paint into the prepared pyrolysis chamber, reduce the temperature of the cracked gas generated by using a heat exchanger, and then pass the first, second and third condensers to fully condensate the cracked gas. The present invention relates to a waste paint and a waste paint recycling apparatus and a method thereof by a pyrolysis method capable of effectively treating air pollutants while circulating the residual cracked gas back to the pyrolysis chamber.

In recent years, environmental pollution due to various wastes generated during industrialization is getting more serious, and various waste treatment technologies and pollution prevention technologies and policies have been proposed to cope with these problems as they become more real.

Currently, in Korea, waste is treated by landfilling, incineration, and recycling, but in the case of landfill, secondary environmental pollution, which leads to landfill or leachate contamination of land and groundwater, is becoming a problem.

In case of incineration, most of the incinerators are incinerated in the form of trash.In this case, post-treatment facilities are necessary because of air pollutants caused by exhaust gases (HCl, HCN, NOx, dioxin, etc.) after combustion. About 30% of residues are generated by incomplete combustion, and the residues are buried again in the landfill, but the residues contain pollutants generated by incineration, which causes secondary pollution due to these incineration residues.

In particular, even in the case of designated waste, the problem is more serious because it is incinerated at high temperature with the garbage instead of being treated separately. The same is true for waste paints and waste paint containers that are designated wastes. According to the Waste Law of the Ministry of Environment, waste paint and waste paint cans are incinerated at high temperature, but not separately.

As such, at each high temperature incinerator in Korea, the designated waste is incinerated together with other wastes, so no matter how high temperature incineration occurs, residues from incomplete combustion may occur. The problem of secondary pollution from designated waste is even more serious because no one can predict the damage of secondary pollution.

In addition, in the case of conventional incinerators, the capacity to be treated must be somewhat large, and since the initial equipment cost of the incinerator for the throughput is high, the treatment facility capable of incineration compared to the amount of waste generated in each industry at present. Is very lacking.

The present invention is to overcome the above-mentioned conventional problems, an object of the present invention is to provide a shuttle kiln pyrolysis chamber of a simple structure capable of pyrolyzing the waste paint and the waste paint buried in the waste paint container, in the pyrolysis chamber Recycling system of waste paint and waste paint container by pyrolysis method to reduce the temperature of the generated cracked gas by using heat exchanger and pass through a plurality of condensers to obtain regenerated oil to completely condense cracked gas and recycling To provide a method.

In addition, another object of the present invention is to circulate the residual decomposition gas not condensed in the condenser back to the pyrolysis chamber to prevent air pollution and at the same time eliminate the need for the installation of an air pollution prevention facility to reduce the initial installation cost The present invention provides a recycling system for waste paint and waste paint cans by pyrolysis.

In addition, another object of the present invention is to circulate the waste heat generated from the heat exchanger to the pyrolysis chamber to warm the combustion air injected into the pyrolysis chamber to reduce the amount of auxiliary fuel used LPG waste paint and waste paint To provide a recycling system for keg.

 In order to achieve the object of the present invention, the waste paint and waste paint recycling system by the pyrolysis method according to the present invention comprises: a shuttle kiln pyrolysis chamber for pyrolyzing waste paint by heat supplied from an auxiliary burner; A heat exchanger connected to an outlet of the pyrolysis chamber to lower the temperature of the decomposition gas discharged from the pyrolysis chamber by air cooling; A condenser connected to the heat exchanger and condensing cracked gas introduced from the heat exchanger with cooling water; It is connected to the condenser is characterized in that consisting of a storage tank for collecting the regeneration oil obtained by condensation in the condenser.                         

In addition, the heat exchanger is provided with a first circulation portion for circulating the heated air used to lower the temperature of the cracked gas into the pyrolysis chamber, and a second circulation portion for circulating the cracked gas remaining without condensation in the condenser into the pyrolysis chamber. It features.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically showing a recycling system of waste paint and a waste paint container by the pyrolysis method according to the present invention, Figure 2 is a schematic block diagram showing a shuttle kiln pyrolysis chamber according to the present invention, Figure 3 Is a schematic block diagram showing a heat exchanger according to the present invention, Figure 4 is a schematic block diagram of a condenser according to the present invention.

As shown in the drawings, the waste paint and waste paint recycling system according to the present invention includes a pyrolysis chamber 10 in which waste paint is pyrolyzed; A heat exchanger (20) for lowering the temperature of the cracked gas generated in the pyrolysis chamber (10); Condenser 30 for condensing the decomposition gas is lowered temperature; Regeneration oil produced by the condensation of the cracked gas consists of a storage tank 40 is collected.

The pyrolysis chamber 10 is a shuttle kiln type (shuttle-kiln type) is provided with an inlet 11 on one side, the cart drive through the inlet 11 so that the input and discharge of the waste paint and waste paint cans A trolley 13 equipped with the apparatus 12 is provided, and on the other side, a discharge port through which the decomposition gas is discharged is formed.

On both sides, a plurality of auxiliary burners 14, which are heating means used for pyrolyzing the waste paint, and a blower port 15 for suctioning combustion air are installed, and the auxiliary burners 14 are pollutants caused by auxiliary fuel. LPG can be used as fuel to minimize emissions. Moreover, the firebrick is mounted in the inside.

The heat exchanger 20 is connected to the outlet of the pyrolysis chamber 10 to lower the temperature of the decomposition gas discharged from the pyrolysis chamber 10 by air cooling.

In addition, the heat exchanger 20 includes a first circulation part 21 in which a blower is installed to circulate the heated air used to lower the temperature of the cracked gas into the pyrolysis chamber 10.

The condenser 30 is connected to the heat exchanger 20 to condense the decomposition gas introduced from the heat exchanger 20 by the cooling water.

The condenser 30 is composed of a first condenser 30a directly connected to the heat exchanger 20 and second and third condensers 30b and 30c connected in series to the first condenser 30a. The first, second and third condensers 30a, 30b and 30c are each provided with a device for supplying cooling water for condensation. This cooling water cools the temperature raised by the cooling fan 32.

In addition, a second circulation part 31 for circulating the cracked gas remaining without condensation in the third condenser 30c into the pyrolysis chamber is provided.

The second circulation part 31 may be formed of any material and shape as long as the residual decomposition gas can flow by connecting the third condenser 30c and the pyrolysis chamber 10. It would also be desirable to have a blower provided for smooth flow.

The first, second, and third condensers 30a, 30b, and 30c are provided with storage tanks 40 connected to collect the condensed recycled oil.

Next, the operation of the waste paint and the waste paint recycling system by the pyrolysis method according to the embodiment of the present invention configured as described above will be described.

First, the waste paint and the waste paint can be collected and pressed into a certain weight and size with a press to reduce the volume to a minimum.

When the waste paint and the waste paint container are prepared as described above, they are loaded into the trolley 13 and driven into the pyrolysis chamber 10 by driving the trolley driving device 12.

Then, the auxiliary burner 14 provided in the pyrolysis chamber 10 is heated, and combustion air is sucked in through the tuyeres 15 to thermally decompose the spent paint. (The pyrolysis step)

In this case, pyrolysis is a method for recovering useful components by decomposing the raw materials by heating the raw materials without contact with oxygen or in the absence of oxygen. Adjust it if possible. The reason for this is to make it possible to produce and recycle high-quality scrap metal by using less heat (850 ℃ or less) by pyrolysis at low temperature, so that the oxidation of waste paint can be reduced by heat.

Decomposed gas is generated when the waste paint is pyrolyzed, and the decomposed gas flows to the heat exchanger 20 through an outlet formed in the pyrolysis chamber 10.

The cracked gas flowing into the heat exchanger 20 is cooled to about 350 ° C. by air in the heat exchanger 20.

In this case, the air heated by the heat exchanger 20 is introduced into the pyrolysis chamber 10 through the first circulation part 21 so as to reduce the amount of auxiliary fuel for heating the temperature inside the pyrolysis chamber 10.

In the cooling step, the decomposition gas whose temperature is lowered is moved to the condenser 30, and the decomposition gas passes through the first, second and third condensers 30a, 30b, and 30c to pass as many recycled oils as possible through the multi-step condensation process. Will be created.

The regenerated oil condensed in the regeneration step is collected in the storage tank 40, and the residual condensed gas which is not condensed is circulated to the pyrolysis chamber 10 through the second circulation part 31. (collection / recirculation step)

As described above, the recycling system of the waste paint and the waste paint canister by the pyrolysis method according to the present invention and the recycling method thereof are treated with the waste paint and the waste paint can be pyrolyzed to produce recycled oil from the incineration residues in the conventional method. It is possible to prevent secondary pollution generated and at the same time reduce the initial facility investment cost by miniaturizing the treatment facility.

In addition, by using the waste heat generated in the heat exchanger to assist the heating of the pyrolysis chamber, it is possible to expect the energy saving effect by reducing the amount of fuel used, and also to obtain high quality scrap because it is pyrolyzed at low temperature. have.

Claims (4)

An inlet 11 is provided on one side, and a trolley 13 equipped with a trolley driving device 12 is provided on the other side to allow the inlet and outlet of the waste paint and the waste paint canister through the inlet 11. Is formed with an outlet for discharging the decomposition gas, and on both sides, an auxiliary burner 14, which is a heating means for pyrolysis of the waste paint, and a blower 15 for intake of combustion air are installed, and a firebrick is loaded therein. A shuttle kiln pyrolysis chamber (10) for thermally decomposing waste paint by heat supplied from the auxiliary burner (14); A heat exchanger 20 connected to an outlet of the pyrolysis chamber 10 to lower the temperature of the decomposition gas discharged from the pyrolysis chamber 10 by air cooling; A condenser 30 connected to the heat exchanger 20 to condense the decomposition gas introduced from the heat exchanger 20 by cooling water; Recycling system of the waste paint and the waste paint canister by the pyrolysis method, characterized in that the storage tank 40 is connected to the condenser (30) is installed to collect the regeneration oil obtained by condensation in the condenser (30). The method of claim 1, The heat exchanger 20 recycles the waste paint and the waste paint container by the pyrolysis method, characterized in that the first circulation portion 21 for circulating the heated air used to lower the temperature of the cracked gas to the pyrolysis chamber is installed. system. The method of claim 1, The condenser 30 is connected to the first, second, third condenser (30a, 30b, 30c) for condensing the cracked gas by the cooling water in series, respectively, the first, second, third condenser (30a, 30b, 30c) Are respectively installed to collect the recycled oil condensed into the storage tank 40, the second circulation portion for circulating the cracked gas remaining without condensation in the third condenser (30c) to the pyrolysis chamber (10) A recycling system for waste paint and waste paint cans by pyrolysis, characterized in that (31) is provided. A pyrolysis preparation step of compressing the collected waste paint and the waste paint container to minimize the volume; A step of inputting the waste paint and the waste paint container prepared in the pyrolysis preparation step into the pyrolysis chamber 10 by driving the cart 13; A pyrolysis step of pyrolyzing the waste paint introduced by heating the auxiliary burner 14 provided in the pyrolysis chamber 10; A cooling step of lowering the temperature by discharging the decomposition gas generated in the pyrolysis step to the heat exchanger 20; A regeneration step of condensing the decomposition gas having a lower temperature in the cooling step in the condenser 30 to generate regeneration oil; The waste paint by the pyrolysis method comprising the collection / circulation step of collecting the regeneration oil condensed in the regeneration step to the storage tank 40, and circulates the non-condensed residual cracked gas into the pyrolysis chamber 10 and How to Recycle Waste Paint Cans.

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