KR20170115833A - By-product using Apparatus of Waste Plastic Pyrolysis Reactor - Google Patents

Abstract

The present invention proposes an apparatus for utilizing by-products of a waste plastic pyrolysis reactor to utilize waste gas generated as a by-product of pyrolysis of waste plastic.
In order to achieve the above object, the present invention provides a method for recovering fuel oil from a gaseous fuel tank, comprising the steps of injecting waste plastics to obtain fuel oil through pyrolysis and collecting fuel oil in a gauge tank through a condenser, Or more, and a cyclone is connected to the outlet side of the reaction tank, and an outlet of the cyclone is connected to a fuel supply pipe for supplying fuel to the heat source of the reactor.
Accordingly, the present invention can produce chloride, which is widely used as a coagulant for water treatment, by utilizing a waste gas containing hydrogen chloride, which is inevitably generated in the thermal decomposition process for recycling waste plastics, Reuse as a heat source for pyrolysis of waste plastics makes it possible to obtain by-product of chloride and to reduce the production cost of recycled fuel oil.

Description

Technical Field [0001] The present invention relates to a waste plastic pyrolysis reactor,

The present invention relates to a device utilizing waste by-products generated from waste plastics pyrolysis reactors such as PS, PP, PC, and the like. In particular, the present invention relates to an apparatus for pyrolysis and pyrolysis in a waste plastic pyrolysis melting furnace, And a device for utilizing the by-product of the waste plastic pyrolysis reactor for recycling the waste gas containing the waste gas.

Recently, the amount of garbage and industrial waste in the city is increasing rapidly, and landfill or incineration is becoming a social problem.

Particularly, urgent measures against the increase of dust particles generated from pulverization of waste automobiles and household electrical appliances are required. Such dust particles are mostly a mixture of waste plastics made of vinyl chloride or the like which is used as a covering material of wiring, These waste plastics mixtures are now mostly being disposed of by landfill and polluting the environment.

On the other hand, plastic waste materials contained in industrial wastes are being studied for use as fuels (solid, oil, gas phase fuel) from the viewpoint of recycling. Typical methods for pyrolysis of such plastic waste materials include plastic waste materials For example, Japanese Patent Application Laid-Open No. 48-00067 (entitled "Method and Apparatus for Carrying Treatment of Waste Streams such as Waste Synthetic Resins"), Japanese Patent Laid- Japanese Patent Application Laid-Open No. 50-04168 (entitled "Method for Obtaining Fuel Oil from Flammable Material in Solid Waste"), Japanese Patent Application Laid Open Gazette 50-85573 (method of treating rubber and plastic waste).

On the other hand, such a conventional plastic waste material often contains a chlorine compound such as vinyl chloride, and the chlorine component is volatilized into hydrogen chloride during pyrolysis of the chlorine-containing plastics containing vinyl chloride and the like, It has a problem that it is corroded or mixed with the recovered fuel.

Also, the incineration method in the atmosphere has a problem of generating harmful chlorine compounds such as dioxins.

In view of such a problem, a method of separating a chlorine component as hydrogen chloride by carrying out high temperature steam at a low temperature prior to the incineration process for the treatment of the chlorinated plastic material is disclosed in Japanese Patent Application Laid-Open No. 48-60466 A method of treating wastes) has been proposed.

Another method is to add iron or iron oxide to vinyl chloride resin and heat treatment to convert chlorine to iron ( _III ) iron (FeCl ₃ ) by reacting with chlorine to vaporize the iron chloride. Japanese Patent Application Laid-Open No. 50-32264 (titled invention: a method for producing a thermoplastic resin foam) has been proposed.

However, the former method still has a problem of corrosion by hydrogen chloride, and the latter method is designed to convert the ferric chloride (III), which is easy to sublimate chlorine, but because the pyrolysis takes place at low temperature, (III) gas. Therefore, there is a problem that it is difficult to utilize the process because the process is complicated.

1. Japanese Patent Application Laid-Open No. 48-0067 (entitled & 2. Japanese Patent Laid-Open Publication No. 49-90773 (title of the invention: plastic mixed solid waste incineration facility) 3. Japanese Patent Laid-Open Publication No. 50-04168 (entitled " Method for Obtaining Fuel Oil from Flammable Substances in Solid Waste) 4. Japanese Patent Laid-Open Publication No. 50-85573 (title of the invention: rubber and plastic waste treatment method) 5. Japanese Patent Laid-Open No. 48-60466 (entitled " Process for treating chlorine-containing synthetic resin waste) 6. Jpn. Pat. Appln. KOKAI Publication No. 48-60466 (Title of the Invention: Method of Treating Chlorine Synthetic Waste)

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems by providing a method of producing iron chloride by using a waste gas discharged into the atmosphere to obtain fuel oil by cooling gas discharged from a reactor heated by a heat source, Which is a waste plastic decomposition reactor.

In order to attain the above object, the present invention provides a gas turbine comprising an opening and closing part on one side of a reactor for introducing waste plastic, a gas outlet on the other side of the reactor, a heat source such as a burner disposed below the reactor, Wherein the waste gas discharged from the reactor is introduced into the upper part of the reaction tank through the at least one condenser through a catalytic device to collect fuel oil in the gauge tank, A reservoir for connecting a cyclone to the outlet side of the reaction tank and connecting the outlet of the cyclone to a fuel supply pipe for supplying fuel to the heat source of the reactor and for recovering water injected into the reservoir from below the cyclone and the reaction tank, And a circulation pump for feeding water to the capillary .

Thus, the present invention can produce chloride, which is widely used as a coagulant for water treatment, by utilizing waste gas containing hydrogen chloride, which is inevitably generated in the pyrolysis process for the recycling of waste plastics, There is a useful effect that reuse as a heat source for pyrolysis of waste plastics makes it possible to obtain a by-product of iron chloride and to reduce the production cost of recycled fuel oil.

In addition, the present invention can prevent the discharge of chloride to an allowable level or less by limiting the use of excessive dilution water by measuring the concentration of hydrogen chloride in the waste gas flowing into the reaction tank, spraying an appropriate amount of water, There is a beneficial effect that the management cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a general block diagram of an apparatus for utilizing byproducts of a waste plastic pyrolysis reactor according to the present invention; FIG.
Fig. 2 is an explanatory view of a device for using a by-product of a waste plastic pyrolysis reactor according to the present invention; Fig.
3 is an enlarged view of a portion A in Fig.
4 is a cross-sectional perspective view showing a part of a reaction tank according to the present invention.
5 is a cross-sectional plan view showing a reactor structure according to the present invention.
FIG. 6 is an exploded perspective view showing an iron tray removed from a side of a reactor according to the present invention. FIG.
7 is a perspective view showing a structure of an iron tray.
FIG. 8 is a schematic view showing an electrical configuration for controlling the water injection amount in the reaction tank according to the present invention. FIG.

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

First, in the detailed description of the present invention, downward means a direction close to the ground, that is, the ground side, and the upper side means the downward opposite direction and the atmospheric side. 1, respectively.

As can be seen from the foregoing, the present invention is characterized in that an opening / closing part 104 driven by a hydraulic cylinder (not shown) is provided at one side of the reactor 100, a gas outlet is provided at the other side of the reactor 100, (Not shown) for rotating the reactor 100 for uniformly distributing the heat by arranging a heat source 103 such as a burner in the lower part and heating and rotating the reactor 100, And the waste plastics charged in the furnace are pyrolyzed and discharged in a gaseous state.

Meanwhile, the discharged gas is converted into a liquid fuel through the catalytic converter 200, and is then cooled through at least one condenser 300 such as a horizontal condenser, a vertical condenser, a ramped condenser, So that the fuel oil is collected, and then the discharged waste gas is utilized to enable the production of the iron chloride and the supply of the auxiliary fuel of the reactor 100.

That is, in the present invention, the collecting pipe 606 is connected to the condenser 300 and one or more reaction vessels 600 vertically installed on the ground, and a plurality of water distribution pipes 501 3 to 7, an iron tray 609 is inserted into a storage space 608 partitioned by a frame 607 provided inside the reaction tank 600, as shown in FIGS. 3 to 7, It is done.

The water in the reservoir 800 is pumped by the circulation pump 801 and is supplied to the water distribution pipe 501. The water in the reservoir 800 is pumped by the circulation pump 801, .

The outlet of the reactor 600 in the present invention is connected to the lower portion of the cyclone 700. The lower end of the cyclone 700 is connected to the reservoir 800. The upper portion of the cyclone 700 is connected to the outlet of the reactor 100 And is connected to the fuel supply pipe 102 provided in the heat source 103.

The waste plastics are pyrolyzed in the reactor 100 heated by the heat source 103 and discharged to the gas phase via the gas discharge port 101. [ do.

Then, the gas discharged into the gas phase is changed into the liquid fuel flow through the catalyst device 200, condensed while passing through the at least one condenser 300, and the liquid fuel oil is stored in the gauge tank 400 at the lower side. The chlorine compound generated by pyrolysis of PVC in the entire pyrolysis and condensation process is combined with hydrogen in the air and volatilized to become hydrogen chloride. The waste gas is passed through a collecting pipe 660 connected to each process to the reaction tank 600 ≪ / RTI >

The waste gas containing hydrogen chloride that has flowed into the upper part of the reaction vessel 600 through the collection pipe 660 passes through the water dispersion pipe 501 and is discharged from the water storage pipe 501 through the reservoir 800 pumped by the circulation pump 801, The hydrogen chloride introduced into the reaction tank 600 is diluted with water and permeated into the iron tray 609.

As shown in FIG. 3, which is an enlarged view of part A of FIG. 2, the iron tray 609 is made up of a net 601 at the top and the bottom, and has a receiving space 602, The diluted hydrogen chloride is passed through the iron tray 609 by inserting iron into the space 602 and closing the upper cover 605 and then fitting it into the accommodating space 608 of the reactor 600. In this process, Are combined to form iron chloride.

The structure of the reaction tank 600 according to the present invention is shown in FIG. 3 to FIG. In addition, the present invention provides a grip portion 603 to easily attach or detach the iron tray 609 to or from the storage space 608.

In the present invention, as shown in FIG. 2, two iron powder trays 609 can be installed in a single row, and a plurality of iron powder trays 609 can be arranged in a "g" shape above and below the housing space 608 in which the iron powder trays 609 are inserted The support frame 607 is installed so as to prevent deformation of the iron tray 609 even when the weight of the iron tray 609 is increased due to permeation of water into the iron tray 609 under a strong water pressure.

In the present invention, three arrangements of the water distribution pipe 501 and the iron tray 609 are arranged. In this process, the water passing through the iron tray 609 is piped to the storage tank 800. Therefore, the circulation pump 801 continuously supplies the water pressure to the water distribution pipe 501 and injects the water. The water is collected in the storage tank 800 through the iron tray 609 by diluting hydrogen chloride in the waste gas, The process of circulation is repeated.

In this way, hydrogen chloride in the waste gas is mostly removed by the action of the iron powder. The hydrogen chloride is collected via the cyclone 700 and the water is collected in the reservoir 800, So that the fuel cost of the heat source 103 can be reduced by supplying the auxiliary fuel to the heat source 103 and the waste gas is recycled, thereby solving all the problems caused by the discharge of the waste gas.

In this way, iron chloride is produced by passing water diluted with water in the iron tray 609 for a sufficient period of time, and the iron tray 609 is taken out by pulling the grasping portion 603 when the process is stopped, 605) is opened to remove the iron chloride, and the iron powder is re-introduced to repeat the above-described process.

In addition, according to the present invention, the amount of water injected from the water distributing pipe 501 is varied according to the concentration of the chlorine gas flowing into the upper end of the reaction tank 600, so that when the concentration of the chlorine gas is low, And when the concentration of the chlorine gas is high, the water injection amount of the water dispersion pipe 501 is increased so that the chlorine-containing concentration in the gas finally discharged into the cyclone 700 is lowered to an allowable value or less.

The A / D converter 901 generates a digital output by the output of the hydrogen chloride sensor 900. The A / D converter 901 converts the output of the A / D converter 901, A microcontrol unit 902 for calculating the difference between the output of the microcomputer 902 and the reference value, a drive circuit 903 for varying the number of revolutions of the variable motor 904 by the output of the microcontrol unit 902, A variable compressor 905 operated by a compressor 904 can be installed.

According to this embodiment, the hydrogen chloride sensor 900 detects the hydrogen chloride concentration in the gas flowing above the reaction tank 600, and applies the analog output voltage corresponding thereto to the A / D converter 901. Accordingly, the A / D converter 901 converts the input signal into a digital signal, compares the digital signal value, which is a reference value pre-inputted in the memory of the microcomputer unit 902, with the reference value, and calculates a signal corresponding to the difference .

The microcontrol unit 902 outputs an output for determining the number of revolutions of the variable motor 904 to the driving circuit 903 in accordance with the calculated output value and the driving circuit 903 is connected to the microcontroller 902 And controls the number of rotations of the variable motor 904 in accordance with the output value.

Accordingly, as the number of revolutions of the variable compressor 905 is varied in accordance with the concentration value sensed by the hydrogen chloride sensor 900, the variable motor 904 controls the compression force of the variable compressor 905 by increasing or decreasing the number of revolutions, The amount of water injected into the water dispersion pipe 501 is adjusted by sucking the water in the reservoir 800.

Accordingly, the present invention can supply water in an amount corresponding to the concentration of hydrogen chloride introduced into the reaction tank 600, thereby suppressing the concentration of chloride in the gas discharged via the cyclone 700, It is possible to suppress the unnecessary increase in the amount of the circulating water and to suppress the amount of waste water generated.

While the present invention has been described in connection with what is presently considered to be preferred embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

100: reactor 101: gas outlet 102: fuel supply pipe 103:
104: opening and closing part 200: catalytic device 300: condenser 400: gauge tank
500: first reaction tank 501: water dispersion tank 550: second reaction tank 600: reaction tank
601: net 602: accommodation space 603: grip part 604:
605: upper cover 606: collection tube 607: frame 608: storage space
609: iron tray 700: cyclone 800: storage tank 801: circulation pump
900: hydrogen chloride sensor 901: A / D converter 902: microcontroller unit
903: drive circuit 904: variable motor 905: variable compressor

Claims (3)

A gas outlet is provided on the other side of the reactor for introducing the waste plastic, a heat source is disposed on the other side of the reactor, a gas discharged from the reactor is supplied to the gauge tank via one or more condensers, Allow fuel oil to be collected,
The reactor is provided with a water distribution pipe and an iron tray installed inside the reactor, a cyclone is connected to the outlet of the reactor, and the outlet of the cyclone is connected to the heat source And a circulation pump connected to the fuel supply pipe for supplying fuel to the water distribution pipe, wherein the water storage tank is provided with a reservoir for recovering water sprayed from the lower part of the reaction tank and the cyclone to the reservoir, Apparatus for utilizing by - products of reactors. The method according to claim 1,
The iron tray is provided with an upper cover having a detached net, a net provided below, an accommodation space and a grasping portion,
Wherein at least one of the iron trays is inserted into a receiving space partitioned by a frame at one side of the reaction tank. The method according to claim 1,
A microcontrol unit for calculating a difference between an output of the A / D converter and a reference value; and a microcontroller for calculating a difference between an output of the A / D converter and a reference value, A drive circuit for varying the number of revolutions of the variable motor at the output of the unit, and a variable compressor operated by the variable motor.

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