KR20220134920A - A pyrolysis petrolizing system having by-pass line - Google Patents

Abstract

The present invention relates to a waste synthetic resin emulsification system equipped with a bypass line capable of moving pyrolysis oil generated in a condenser to a storage tank even in the air (cooling mode) for cooling after shutdown of pyrolysis oil. The waste synthetic resin emulsification system equipped with a bypass line of the present invention includes a pyrolysis furnace, a condenser, and a storage tank.

Description

Waste synthetic resin emulsification system with bypass line {A pyrolysis petrolizing system having by-pass line}

The present invention relates to a waste synthetic resin emulsification system for pyrolyzing waste synthetic resins such as waste plastics and waste vinyl to produce pyrolyzed oil. It relates to a waste synthetic resin emulsification system equipped with a bypass line capable of flowing the pyrolysis oil generated in the condenser to a storage tank even in the air (cooling mode) for cooling after stopping the operation of the pyrolysis oil.

There are two types of emulsifying devices: a batch type in which waste is heated and melted from the outside in a state in which it is put into a pyrolysis furnace, and a continuous type in which waste is continuously put into the pyrolysis furnace and heated from the outside.

The emulsification system of the prior art was equipped with a condenser for cooling and liquefying the oil vapor generated in the rotary pyrolysis furnace for heating and rotating the waste. The condenser is manufactured in an approximately cylindrical shape. The pyrolysis oil generated in the heat exchange process is stored in a separate storage tank.

Due to the shape of the condenser, it was difficult to restart the operation after removing all the residual pyrolysis oil inside and putting the waste again. In addition, since oil vapor generated from the pyrolysis furnace and the condenser is generated as pyrolysis oil or discharged as oil vapor, a negative pressure has to be formed inside. When the inlet provided in the pyrolysis furnace is opened in a state in which negative pressure is formed, an explosion may occur due to the rapid inflow of air. Alternatively, in a state in which the operation is stopped, there is a problem in that air, etc. flows back from the pipe side from which the oil vapor is discharged due to the internal negative pressure and may be introduced into the condenser and the pyrolysis furnace.

Registered Patent No. 10-2071339 (Registered as 2020122; Waste Energy Solution Co., Ltd.; Continuous pyrolysis emulsification device for stable discharge of gas and sludge)

The present invention aims to solve the above problems.

When the cooling of the pyrolysis furnace starts, the residual pyrolysis oil generated inside the condenser is to be efficiently stored to the storage tank. In addition, when cooling the pyrolysis furnace, it is not only to prevent rapid inflow of external air due to the generation of negative pressure in the pyrolysis furnace and the condenser, but also to prevent the risk of fire, etc. that may be caused by this.

The present invention is a thermal decomposition furnace 100 for generating oil vapor by heating the waste synthetic resin; a main discharge pipe 210 condensing the oil vapor by heat exchange and discharging the pyrolysis oil generated by the condensation of the oil vapor; and an auxiliary discharge pipe 220 mounted on the lower portion to separately discharge the residual pyrolysis oil inside; a condenser 200 provided with; and a storage tank 300 for storing the pyrolysis oil flowing to the main discharge pipe 210 and the auxiliary discharge pipe 220; It relates to a waste synthetic resin emulsification system equipped with a bypass line, characterized in that it comprises a.

The present invention is a vacuum water storage tank 400 in which cooling water is stored; And as the cooling water of the vacuum water storage tank 400 is sucked and rotated, the gas containing the oil vapor contained in the condenser 200 is sucked and discharged to the vacuum water storage tank 400 by a pump 500 ; may include

One side of the vacuum water storage tank 400 of the present invention may further include a chiller 410 for controlling the temperature of the cooling water inside the vacuum water storage tank 400 .

The present invention includes a main pipe (MP) communicating the condenser 200 and the pump 500 and including a main valve (MV) for determining whether the gas flows therein; And a bypass pipe communicating the reservoir 300 and the pump 500, and including a bypass valve (BV) for determining whether the gas inside the reservoir 300 flows to the pump 500 side ( BP); may further include.

In the present invention, when the pyrolysis furnace 100 is in the heating mode, the main valve is such that the oil vapor in the pyrolysis furnace passes through the condenser 200 and then flows into the vacuum water storage tank 400 by the pump 500 . (MV) is opened, the bypass valve (BV) is shut off, and when the pyrolysis furnace 100 is in the cooling mode, the remaining regenerated oil can be introduced into the storage tank 300 through the auxiliary discharge pipe 220 . The bypass valve BV may be opened and the main valve MV may be blocked.

The present invention may further include a sub-tank 600 provided between the condenser 200 and the pump 500 to temporarily store oil vapor flowing out of the condenser 200 to generate pyrolysis oil.

When the cooling of the pyrolysis furnace starts, the residual pyrolysis oil generated inside the condenser can be efficiently stored to the storage tank, and when cooling the pyrolysis furnace, external air due to the generation of negative pressure in the pyrolysis furnace and the condenser can be rapidly introduced can be prevented, and the risk of fire, etc. that may be caused by this can be prevented.

1 is a conceptual diagram of a waste synthetic resin emulsification system equipped with a bypass line according to the present invention.
2 is an internal conceptual view of the condenser in the present invention;
Figure 3 is a flow chart of various fluids in the waste synthetic resin emulsification system according to the present invention.
4 is a fluid flow chart for discharging water vapor generated during initial heating in the waste synthetic resin emulsification system according to the present invention;
Figure 5 is a fluid flow diagram in the case of heating mode in the waste synthetic resin emulsification system according to the present invention
Figure 6 is a fluid flow diagram in the case of cooling mode in the waste synthetic resin emulsification system according to the present invention

It will be described in detail with reference to the accompanying drawings.

The waste synthetic resin emulsification system equipped with a bypass line according to the present invention will be described in detail with reference to FIGS. 1 to 6 .

Each component will be described with reference to FIGS. 1 and 2, and the like.

Referring to Figure 1, the ball invention is a pyrolysis furnace 100, a condenser 200, a storage tank 300 in which pyrolysis oil is stored, a vacuum water storage tank 400, a pump 500, a sub-tank 600, a cooling tower 700 ) and so on.

With reference to FIG. 1, the flow of a fluid including oil vapor, thermal decomposition oil, etc. generated according to the emulsification of waste synthetic resin will be described. The waste synthetic resin is put into the drum 120 of the pyrolysis furnace 100 . The inside of the drum 120 is heated through the burner 110 in the lower part of the drum 120 . As the input waste synthetic resin melts, oil vapor is generated. The generated oil vapor flows toward the condenser 200 connected to the pyrolysis furnace 100 . In the condenser 200, the oil vapor is heat-exchanged. During heat exchange, some of the oil vapor is liquefied into pyrolysis oil. The pyrolysis oil flows into the storage tank 300 in communication with the condenser 200 and is stored. The oil vapor that is not liquefied inside the condenser 200 flows into the cooling tower 700 side. The oil vapor introduced into the cooling tower 700 is heat-exchanged again. The pyrolysis oil liquefied through heat exchange flows into the storage tank 300 and is stored. The oil vapor that has not been liquefied flows into the sub-tank 600 side. As shown, it flows into the bottom side of the sub-tank 600 . The oil vapors introduced into the sub-tank 600 may coagulate and liquefy to generate pyrolysis oil. The generated pyrolysis oil flows into the storage tank 300 and is stored. The residual oil vapor is sucked by the pump 500 and introduced into the vacuum water storage tank 400 . The oil vapor introduced into the vacuum water storage tank 400 may be supplied back to the burner 110 side and used as a main heat source of the pyrolysis furnace. The combusted gas is discharged to the outside after calling through a separately provided desulfurization and desalination device.

The flow of oil vapor generated in the waste synthetic resin emulsification process and cooling water for heat exchange, etc. will be described with reference to FIG. 1 .

A cooling water storage tank 800 is provided in the emulsification system according to the present invention. The cooling water of the cooling water storage tank 800 flows inside the condenser 200 . After flowing, it flows back into the cooling water storage tank 800 . Also, the cooling water flows inside the cooling tower 700 and then flows again.

On the other hand, the vacuum water storage tank 400 is stored in the vacuum water required for the operation of the pump (500). For the smooth operation of the pump 500, it is essential to maintain an appropriate temperature of the vacuum water. For this purpose, a chiller 410 is provided. In the chiller 410, a refrigerant (which may be R-22) flows. As shown, the refrigerant (R-22) flows in the vacuum water storage tank 400 along a separately provided pipe.

1 and 2, each component will be described.

Referring to FIG. 1 , the drum 120 and the condenser 200 of the pyrolysis furnace 100 are rotated by receiving the rotational force of the motor M around the same virtual rotation axis. The rotational force of the motor M may be transmitted to the drum 120 and the condenser 200 side by a sprocket, a belt, or a chain to be rotated. It is to be heated evenly so that the waste synthetic resin can be emulsified more quickly, and at the same time, it is rotated to facilitate heat exchange inside the condenser.

Referring to FIG. 1 , the pyrolysis furnace 100 includes a burner 110 and a drum 120 . The burner 110 heats the outer surface of the drum 120 to melt the waste synthetic resin inside the drum 120 . As outlined above, the residual oil vapor discharged from the vacuum water storage tank 400 is supplied to the burner 110 side and burned together. The residual oil vapor may contain gases such as ethane, butane, and propane, and thus may be used as the main fuel.

Referring to FIG. 1 , as the drum 120 is rotated, the waste synthetic resin therein may flow toward the condenser 200 in an undissolved state. In order to prevent this, a reverse screw 130 was provided inside the pipe connecting the drum 120 and the condenser 200 . The reverse screw 130 has a screw formed in a direction opposite to the rotation direction of the drum 120 . As a result, the problem that the waste synthetic resin that has not been melted properly flows into the inside of the condenser 200 can be solved.

1 and 2 , the condenser 200 may have a cylindrical drum shape. It is preferable that it has a cylindrical or prismatic shape. The condenser 200 includes a main discharge pipe 210 disposed on a virtual rotating shaft, an auxiliary discharge pipe 220 formed on the lower side of the circumferential surface, and a disk 230 provided therein.

1 and 2, a plurality of disks 230 having a shape corresponding to the cross-sectional shape of the condenser 200 are fixed. An empty space is formed inside the disk 230 to allow the coolant to flow, and a flow channel 231 is formed on one side so that the oil vapor generated inside the drum 120 can flow toward the main discharge pipe 210 . The flow channel 231 for each disk 230 may be disposed at a position corresponding to the flow channel 231 of the adjacent disk 230 , but is preferably disposed on the side in a direction symmetrical about the rotation axis. As shown, if the flow channel of one disk is disposed on the upper surface, the flow channel of the other adjacent disk is disposed on the lower surface side. The cooling water starts from the external cooling water storage tank 800 and reaches the disk 230 on the side closest to the pyrolysis furnace 100 along the cooling water inlet pipe 240 . The cooling water flowing through the disk 230 flows to the adjacent disk 230 along the flow pipe 232 connected to the adjacent disk 230 . After sequentially flowing for each disk 230 in this way, it is discharged to the cooling water storage tank 800 along the cooling water outlet pipe 250 .

As shown in FIG. 2 , pyrolysis oil is accumulated inside the condenser 200 . The accumulated pyrolysis oil flows out along the main discharge pipe 210 , but the residual pyrolysis oil that has not flowed out has no choice but to remain on the condenser 200 side. After removing this, it is necessary to operate the pyrolysis furnace 100 again.

For reliable removal, an auxiliary discharge pipe 220 was provided on the lower side of the condenser between the plurality of disks. The valve may be provided for each auxiliary discharge pipe 220 , or one valve may be provided on the discharge pipe side where a plurality of auxiliary discharge pipes 220 are collected.

As shown in FIG. 1 , the oil vapor passing through the condenser 200 may flow along the cooling tower 700 . The cooling tower 700 is provided with an oil vapor pipe 710 through which oil vapor flows, and a housing pipe 720 for enclosing the oil vapor pipe 710 for heat exchange. An inlet 721 and an outlet 722 through which the cooling water of the cooling water storage tank 800 is introduced are provided on the housing pipe 720 side. The pyrolysis oil condensed and generated while passing through the cooling tower 200 flows into the storage tank 300 .

As shown in FIG. 1 , the oil vapor that is not condensed while passing through the cooling tower 700 is introduced into the sub-tank 600 . The sub-tank 600 includes an inlet pipe 610 for inducing the oil vapor to the bottom of the tank, and a plurality of conical-shaped stagnant membranes 620 that are inclined downward along the outer circumferential surface of the inlet pipe. Similar to mist, pyrolysis oil is atomized inside the residual oil vapor and may float or flow in the gas. In order to stagnate the pyrolysis oil in the sub-tank 600, the inlet pipe 610 was pulled down close to the bottom surface. In addition, a plurality of cone-shaped stagnant membranes 620 were disposed along the outer circumferential surface of the inlet pipe 610 so that the residual oil vapor discharged from the inlet pipe 610 could slowly rise. Due to the increase in the residence time of the residual oil vapor, the atomized pyrolysis oil may agglomerate and liquefy. The liquefied pyrolysis oil is stored in the aforementioned storage tank 300 . If the pyrolysis oil atomized in the residual oil vapor is directly introduced into a pump to be described later, a problem may occur in the durability of the pump. In order to solve this problem, a sub-tank 600 was disposed. By efficiently removing the atomized pyrolysis oil, the durability of the pump 500 may be improved.

The pump 500 is disposed at the rear end of the sub-tank 600 for the smooth flow of this series of oil vapors. A series of flows flowing through the pyrolysis furnace 100 , the condenser 200 , the cooling tower 700 , and the sub-tank 600 by the pump 500 can be smoothed. The pump 500 is preferably a water ring vacuum pump. A vacuum water storage tank 400 was disposed next to the pump 500 for smooth operation of the water ring vacuum pump. As the internal vacuum water is sucked and rotated by the pump 500 , the oil vapor may be sucked together and then introduced into the vacuum water storage tank 400 . Since vacuum formation may be difficult when the vacuum water is at a predetermined temperature, that is, 30 degrees C or higher, cooling of the vacuum water is essential. The introduced residual oil vapor is supplied to the burner as described above and used as a heat source.

This series of flows is shown in FIG. 3 . The solid line is the pyrolysis oil flow line, the dotted line is the water vapor flow line, the broken line is the oil vapor flow line, the dashed-dotted line is the coolant flow line, and the double-dotted line is the refrigerant (R-22) flow line. A valve may be arranged for each line as needed.

4 is an initial heating mode, that is, a time point at which steam is generated while the drum 120 is heated by the burner 110 . During initial heating, water vapor with the first waste synthetic resin is evaporated and water vapor is discharged. To this end, the V1 valve is opened, is connected to the door side disposed on the front side of the pyrolysis furnace 100 , and surrounds the outer circumferential surface of the drum 120 , and water vapor is supplied to the part for supplying heat to the inside of the drum 120 . Substances that generate odors due to heat together with the supplied water vapor are deodorized while burning. To this end, a V2 valve at the front end of the auxiliary condenser 700 and a V3 valve at the front end of the storage tank 300 may be provided. That is, in order to collect and efficiently discharge only the initially generated water vapor, water vapor that may be introduced into the auxiliary condenser 700 and the storage tank 300 is blocked. It is very preferable to arrange a valve between the pyrolysis furnace 100 and the condenser 200 to block the inflow into the condenser 200 side. However, it should be considered that a problem may occur in the durability of the valve due to the high temperature of the pyrolysis furnace 100 .

FIG. 5 shows the flow of various fluids, that is, oil vapor, pyrolysis oil, cooling water and refrigerant, when oil vapor is actively generated while the drum 120 is heated by the heating mode, that is, the burner 110 . 6 shows the cooling mode, that is, when the operation of the burner 110 is stopped and the temperature of the pyrolysis furnace 100 such as the drum 120 and the condenser 200 is lowered. More specifically, when the temperature inside the pyrolysis furnace and the condenser is brought to room temperature, the waste synthetic resin remaining inside is hardened, and the flow of the internal fluid may not be smooth. Rather, it means a fluid flow for discharging the residual pyrolysis oil inside the condenser 200 in a temperature range until the waste synthetic resin is melted and has a certain degree of fluidity after the operation of the burner 110 is stopped.

Referring to FIG. 5 , the oil vapor of the pyrolysis furnace 100 is condensed while passing through the condenser 200 , some of the pyrolysis oil is transferred to the storage tank 300 , and the remaining oil vapor is a cooling tower 700 , a sub-tank 600 and vacuum water. It passes through the storage tank 400 and is re-introduced to the pyrolysis furnace side. Cooling water may flow inside the condenser, the cooling tower 700, and the vacuum water storage tank 400 if necessary. For this, the main valve MV provided on the main pipe MP is opened, and the bypass valve BV provided on the bypass pipe BP is blocked. It is preferable that the valve provided on the side of the auxiliary discharge pipe 220 is also blocked. In the present invention, the bypass line may be understood to include an auxiliary discharge pipe 220 provided under the condenser 200 and a bypass pipe BP connecting the vacuum water storage tank 400 from the storage tank 300. .

Referring to FIG. 6 , in a state where the operation of the burner 110 is stopped, it is a flow for discharging the residual pyrolysis oil inside the condenser 200 . First, the auxiliary discharge pipe 220 and the connection pipe 310 provided in the storage tank 300 are mutually joined. The valve on the auxiliary discharge pipe 220 is also opened. On the other hand, the main valve MV on the main pipe MP is blocked. Suction force is operated toward the bypass pipe BP by the operation of the pump 500 . Accordingly, the residual pyrolysis oil in the condenser 200 is introduced into the storage tank 300 side. It is possible to efficiently discharge the residual pyrolysis oil in the condenser 200 .

Through this, it is possible to solve problems such as fire or explosion in the pyrolysis furnace or the condenser due to the inflow of external air in the cooling mode.

100: pyrolysis furnace 200: condenser
300: storage tank 400: vacuum water storage tank
500: pump 600: sub tank
700: cooling tower 800: cooling water storage tank

Claims (6)

Thermal decomposition furnace 100 for heating the waste synthetic resin to generate oil vapor;
a main discharge pipe 210 condensing the oil vapor by heat exchange and discharging the pyrolysis oil generated by the condensation of the oil vapor; and an auxiliary discharge pipe 220 mounted on the lower portion to separately discharge the residual pyrolysis oil inside; a condenser 200 provided with; and
a storage tank 300 for storing the pyrolysis oil flowing to the main discharge pipe 210 and the auxiliary discharge pipe 220; Waste synthetic resin emulsification system equipped with a bypass line, characterized in that it comprises a.
The method of claim 1,
a vacuum water storage tank 400 in which cooling water is stored; and
a pump 500 for sucking in and rotating the cooling water of the vacuum water storage tank 400 , the gas containing oil vapor contained in the condenser 200 is sucked and discharged to the vacuum water storage tank 400 ; Waste synthetic resin emulsification system equipped with a bypass line, characterized in that it comprises a.
3. The method of claim 2,
Waste synthetic resin emulsification system provided with a bypass line, characterized in that one side of the vacuum water storage tank (400) further comprises a chiller (410) for controlling the temperature of the cooling water inside the vacuum water storage tank (400).
3. The method of claim 2,
a main pipe (MP) communicating the condenser 200 and the pump 500 and including a main valve MV for determining whether the gas flows therein; and
A bypass pipe (BP) that communicates the storage tank 300 and the pump 500 and includes a bypass valve (BV) for determining whether the gas inside the storage tank 300 flows to the pump 500 side. ); Waste synthetic resin emulsification system with a bypass line, characterized in that it further comprises.
5. The method of claim 4,
When the pyrolysis furnace 100 is in the heating mode, the main valve MV so that the oil vapor in the pyrolysis furnace flows into the vacuum water storage tank 400 by the pump 500 after passing through the condenser 200 . is opened, and the bypass valve (BV) is blocked,
When the pyrolysis furnace 100 is in the cooling mode, the bypass valve BV is opened so that the residual regenerated oil can be introduced into the storage tank 300 through the auxiliary discharge pipe 220, and the main valve MV is Waste synthetic resin emulsification system equipped with a bypass line, characterized in that it is blocked.
3. The method of claim 2,
Bypass, which is provided between the condenser 200 and the pump 500 and further includes a sub-tank 600 for temporarily storing oil vapor flowing out from the condenser 200 to generate pyrolysis oil Waste synthetic resin emulsification system equipped with a line.

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