Large-capacity plastic garbage pyrolysis equipment

Abstract

The utility model discloses large-capacity plastic garbage pyrolysis equipment, and relates to the technical field of garbage recovery and treatment equipment. The plastic garbage pyrolysis equipment comprises a feeding bin, a pyrolysis pipe, a gas-solid separation bin, a slag bin, a condenser, an oil-water separator and a steam generator, the pyrolysis pipe is provided with a garbage input end, a steam input end and a pyrolysis material output end. According to the plastic garbage pyrolysis equipment disclosed by the utility model, garbage is directly blown through high-temperature steam, so that the heat transfer efficiency is greatly improved, the pyrolysis speed is greatly accelerated, high-speed large-capacity garbage treatment can be realized, and the problems of low treatment capacity and low heat efficiency of the existing garbage pyrolysis equipment are solved; and the pyrolysis pipe is adopted for pyrolysis, and the inner wall of the pyrolysis pipe is difficult to form wall adhesion and coking under strong blowing of steam and oil gas, so that the problem that the existing garbage pyrolysis equipment is easy to adhere to the wall is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage recycling equipment technical field, especially, relate to a large capacity's plastic garbage pyrolysis equipment. BACKGROUND

[0002] At present, for the plastic garbage of good classification and single category, the existing plastic garbage recycling equipment can be used to realize better recycling and reuse, but for the plastic garbage of low value and complex variety, such as plastic packaging waste (including plastic bags, plastic film, plastic meal box and tableware etc.), plastic toys and plastic ornaments, there is no better low-cost and large-capacity treatment equipment. There are some experimental pyrolysis equipment on the market, which can decompose plastic garbage by heating to high temperature, so as to realize the treatment of plastic garbage, but these experimental pyrolysis equipment generally has the following problems: (1) the treatment capacity is low, generally only a few hundred kilograms or a few tons of plastic garbage can be treated per day, it is difficult to realize large-capacity garbage treatment; (2) these equipment are prone to wall sticking problem during operation, which makes it difficult to run continuously for a long time, and frequent shutdown is needed for cleaning, which not only reduces the treatment efficiency, but also increases the operation cost; (3) the existing pyrolysis equipment mainly uses pyrolysis furnace to pyrolyze plastic garbage, which often needs to consume a large amount of energy to maintain high temperature environment, not only high energy consumption, but also low heat efficiency of pyrolysis furnace, resulting in high treatment cost. SUMMARY

[0003] In view of the above problems of the prior art, the purpose of the utility model is to provide a large-capacity plastic garbage pyrolysis equipment, which has the advantages of high heat transfer efficiency, greatly accelerates the pyrolysis speed of garbage, can realize high-speed and large-capacity garbage treatment, and the utility model uses pyrolysis tube for pyrolysis, which is difficult to form wall sticking and coking on the inner wall of the pyrolysis tube under the strong blowing of steam and oil gas, solving the problems of low treatment capacity, low heat efficiency and easy wall sticking of the existing garbage pyrolysis equipment.

[0004] In order to solve the above technical problems, the utility model provides a large-capacity plastic garbage pyrolysis equipment, which comprises a feeding bin, a pyrolysis tube, a gas-solid separation bin, a residue bin, a condenser, an oil-water separator and a steam generator.

[0005] The pyrolysis tube is provided with a garbage input end, a steam input end and a pyrolysis material output end.

[0006] The top of the feeding bin is provided with a feeding port for the plastic waste to be treated to enter, the discharging end of the feeding bin is communicated with the waste input end, the steam output end of the steam generator is communicated with the steam input end, and steam output from the steam output end of the steam generator is used to transport and heat the plastic waste to be treated, so that the plastic waste to be treated is pyrolyzed in the interior of the pyrolysis tube.

[0007] The pyrolysis material output end is communicated with the material input end of the gas-solid separation bin, the oil gas output end of the gas-solid separation bin is communicated with the input end of the condenser, the residue output end of the gas-solid separation bin is communicated with the residue bin, the liquid output end of the condenser is communicated with the input port of the oil-water separator, the pyrolysis gas output end of the condenser is communicated with the pyrolysis gas recovery end of the steam generator, the water output port of the oil-water separator is communicated with the waste water recovery end of the steam generator, and the pyrolysis oil output port of the oil-water separator is communicated with an external oil tank.

[0008] Preferably, the pyrolysis tube comprises a gentle section and an ascending section, and the gentle section and the ascending section are communicated in a smooth transition manner.

[0009] The ascending section has an ascending trend along the advancing direction of the plastic waste to be treated.

[0010] The waste input end and the steam input end are respectively arranged on the side of the gentle section away from the ascending section, and the pyrolysis material output end is arranged on the side of the ascending section away from the gentle section.

[0011] Preferably, the steam input end and the gentle section are connected in the same straight line, and the mounting position of the waste input end is closer to the ascending section than the mounting position of the steam input end.

[0012] Preferably, the cross-sectional area of the lower part of the waste input end gradually increases along the feeding direction of the plastic waste to be treated.

[0013] Preferably, the pyrolysis tube is externally provided with a heat insulation layer.

[0014] Preferably, the plastic waste pyrolysis equipment further comprises a residue discharging screw, the residue output end of the gas-solid separation bin is communicated with the input end of the residue discharging screw, and the output end of the residue discharging screw is communicated with the residue bin.

[0015] Preferably, the residue discharging screw is externally provided with a cooling jacket, and the cooling jacket contains a cooling medium in the interior.

[0016] Preferably, the plastic waste pyrolysis equipment further comprises a chlorine removal purifier, the pyrolysis gas output end of the condenser is communicated with the input end of the chlorine removal purifier, and the output end of the chlorine removal purifier is communicated with the pyrolysis gas recovery end of the steam generator.

[0017] Preferably, the garbage input end is provided with a feeding regulator.

[0018] Preferably, the plastic garbage pyrolysis equipment further comprises a sealed feeder installed at a feeding port of the feeding bin.

[0019] The present application has the following advantages: the large-capacity plastic garbage pyrolysis equipment directly blows the garbage with steam at a temperature of 400-900℃, greatly improving the heat transfer efficiency and thus greatly accelerating the pyrolysis speed, thereby realizing high-speed and large-capacity garbage treatment. The equipment of the present application fully decomposes the residual organic matter in the waste water generated by pyrolysis through a steam generator, greatly reducing the residual organic matter in the waste water. Thanks to the high-efficiency heat conduction of air blowing, the raw garbage with high humidity does not need to be pre-treated by drying, greatly saving the drying energy consumption and treatment cost. The plastic garbage pyrolysis equipment of the present application solves the biggest problem in the plastic pyrolysis industry: coking and wall sticking. In the pyrolysis treatment, the pyrolysis tube of the present application is difficult to form wall sticking and coking under the strong blowing and brushing of superheated steam and oil gas. In addition, the plastic garbage pyrolysis equipment of the present application has a simple structure, a greatly prolonged maintenance period and increased equipment uptime. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the large-capacity plastic garbage pyrolysis equipment in an embodiment of the present application;

[0021] Figure 2 is Figure 1 is an enlarged view of S in the plastic garbage pyrolysis equipment shown in Fig. 1;

[0022] Figure 3 is Figure 1 is a structural schematic view of the slag discharge screw in the plastic garbage pyrolysis equipment shown in Fig. 1;

[0023] Fig. 1 is a structural schematic view of a large-capacity plastic garbage pyrolysis equipment according to the present application; DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described in further detail below in combination with the drawings. The utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive.

[0025] In the description of the utility model, it is understood that the terms "upper", "lower", "left", "right", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0026] In the description of the utility model, it is understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "communication" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] As shown in Figures 1 to 3 A large-capacity plastic garbage pyrolysis equipment, comprising a feed bin 1, a pyrolysis tube 2, a gas-solid separation bin 3, a residue bin 5, a condenser 6, an oil-water separator 7 and a steam generator 8;

[0028] The pyrolysis tube 2 is provided with a garbage input end 21, a steam input end 22 and a pyrolysis material output end 23;

[0029] The top of the feed bin 1 is provided with a feed inlet for the plastic garbage 10 to be treated to enter, the discharge end of the feed bin 1 and the garbage input end 21 are in communication, the steam output end of the steam generator 8 and the steam input end 22 are in communication, and the steam output from the steam output end of the steam generator 8 is used for conveying and heating the plastic garbage to be treated, so that the plastic garbage to be treated is pyrolyzed in the interior of the pyrolysis tube 2;

[0030] The pyrolysis material output end 23 is communicated with the material input end of the gas-solid separation bin 3, the oil gas output end of the gas-solid separation bin 3 is communicated with the input end of the condenser 6, the residue output end of the gas-solid separation bin 3 is communicated with the residue bin 5, the liquid output end of the condenser 6 is communicated with the input port of the oil-water separator 7, the pyrolysis gas output end of the condenser 6 is communicated with the pyrolysis gas recovery end of the steam generator 8, the water output port of the oil-water separator 7 is communicated with the waste water recovery end 83 of the steam generator 8, and the pyrolysis oil output port of the oil-water separator 7 is communicated with an external oil tank.

[0031] The technical solution creatively utilizes the thermal decomposition characteristics of plastic waste, creates conditions for thermal decomposition of plastic waste, and invents a plastic waste pyrolysis device which can be continuously operated for a long time, has large processing capacity, low energy consumption, high efficiency and low cost.

[0032] Specifically, as shown in the drawings, the large-capacity plastic waste pyrolysis device of the technical solution comprises a feeding bin 1, a pyrolysis tube 2, a gas-solid separation bin 3, a residue bin 5, a condenser 6, an oil-water separator 7 and a steam generator 8. Figure 1 The process of pyrolysis treatment of the plastic waste pyrolysis device adopting the technical solution on the plastic waste to be treated comprises the following steps:

[0033] (1) The plastic waste to be treated enters the feeding bin 1 from the feeding port of the feeding bin 1.

[0034] (2) The plastic waste to be treated in the feeding bin 1 enters the pyrolysis tube 2 quantitatively under the control of the external control center. The pyrolysis tube 2 has two input ends, which are a garbage input end 21 and a steam input end 22. The garbage input end 21 is used to input garbage, and the steam input end 22 is used to input steam to push and heat the plastic waste to be treated.

[0035] (3) The plastic waste to be treated coming from the garbage input end 21 moves forward rapidly under the pushing of the high-pressure superheated steam. The steam transfers heat to the plastic waste to be treated while conveying the plastic waste to be treated, and makes the plastic waste to be treated rapidly pyrolyze to generate high-temperature oil gas and pyrolysis residue. The high-temperature oil gas generated by the pyrolysis of the plastic waste to be treated in the pyrolysis tube 2 further pushes the pyrolysis residue to move forward at high speed and enter the gas-solid separation bin 3. The temperature of the steam is 400-900 DEG C.

[0036] (4) The high-temperature oil gas and pyrolysis residue coming out of the pyrolysis tube 2 enter the gas-solid separation bin 3 from the material input end of the gas-solid separation bin 3. The high-temperature oil gas goes out from the oil gas output end of the gas-solid separation bin 3 and enters the condenser 6 for condensation. The pyrolysis residue goes out from the residue output end of the gas-solid separation bin 3 and is discharged to the residue bin 5.

[0037] (5) The high-temperature oil gas after slagging (dust removal) by the gas-solid separation bin 3 enters the condenser 6 through the pipeline, the liquid material condensed by the condenser 6 enters the oil-water separator 7, and the gaseous material enters the steam generator 8.

[0038] (6) The pyrolysis oil separated in the oil-water separator 7 is transported to the external fuel oil tank through the pyrolysis oil output port of the oil-water separator 7 for sale; the water separated in the oil-water separator 7 enters the steam generator 8 through the water output port of the oil-water separator 7 to generate high-temperature superheated steam, and if there is excess water, it can be discharged externally.

[0039] It is worth mentioning that the large-capacity plastic waste pyrolysis equipment of the technical solution directly blows the waste by using steam with a temperature of 400-900℃, the heat transfer efficiency is greatly improved, and the pyrolysis speed is greatly accelerated, thereby realizing high-speed and large-capacity waste treatment. At the same time, the equipment of the technical solution fully decomposes the residual organic matter in the waste water generated by pyrolysis through the steam generator 8, greatly reducing the residual organic matter in the waste water. Due to the high-efficiency heat conduction of the air blowing, the raw material waste with high humidity does not need to be pre-treated by drying, greatly saving the drying energy consumption and treatment cost. The plastic waste pyrolysis equipment of the technical solution solves the biggest problem of the plastic pyrolysis industry: coking and wall sticking. In the pyrolysis treatment, the inside of the pyrolysis tube 2 of the technical solution is difficult to form wall sticking and coking under the strong brushing of the superheated steam and oil gas. In addition, the plastic waste pyrolysis equipment of the technical solution has a simple structure, the maintenance cycle is greatly prolonged, and the equipment utilization rate is increased.

[0040] As a preferred, the technical solution further includes a step of pre-treating the plastic waste to be treated before pyrolysis treatment, and the pre-treatment method includes crushing the plastic waste to be treated to a size of less than 5 cm.

[0041] Preferably, the inner wall of the pyrolysis tube 2 of the technical solution is smooth, so that the waste can be pushed forward at high speed in the pyrolysis tube 2.

[0042] Preferably, the connection between the pyrolysis material output end 23 and the gas-solid separation bin 3 of the technical solution forms a tangent with the bin wall of the gas-solid separation bin 3. After the pyrolysis product (i.e. the mixture of high-temperature oil gas and pyrolysis residue) enters the gas-solid separation bin 3, it will form a vortex flow in the gas-solid separation bin 3. The solid residue will fall to the slag material output end of the gas-solid separation bin 3 under the action of centrifugal force, and then be discharged to the slag bin 5.

[0043] Specifically, the condenser 6, the oil-water separator 7 and the steam generator 8 of the technical solution are all well-known commercially available products.

[0044] Preferably, the steam output end of the steam generator 8 is connected with the steam input end 22 of the pyrolysis tube 2 through a connecting pipe, and a steam regulating valve 81 is arranged on the connecting pipe to regulate the flow of steam into the pyrolysis tube 2.

[0045] Further, the pyrolysis tube 2 comprises a flat section 24 and an ascending section 25, which are connected in a smooth transition;

[0046] The ascending section 25 has an ascending trend along the advancing direction of the plastic waste to be treated;

[0047] The waste input end 21 and the steam input end 22 are arranged on the side of the flat section 24 away from the ascending section 25, and the pyrolysis material output end 23 is arranged on the side of the ascending section 25 away from the flat section 24.

[0048] The pyrolysis tube 2 of the present application comprises a flat section 24 and an ascending section 25. The flat section 24 is a relatively flat pipe, and the ascending section 25 is a pipe having an ascending trend along the advancing direction of the material. The flat section 24 and the feeding bin 1 are connected in a smooth transition. The arrangement of the flat section 24 enables the plastic waste to be treated in the feeding bin 1 to smoothly enter the flat section 24, avoiding the blockage of the plastic waste to be treated when feeding. The ascending section 25 has an ascending trend from the side close to the feeding bin 1 to the side close to the gas-solid separation bin 3, enabling the steam and the plastic waste to be treated to be in more sufficient contact, transferring heat to the plastic, and then rapidly pyrolyzing the plastic waste. The pyrolysis tube 2 of the present application can effectively improve the heat transfer efficiency, greatly accelerate the pyrolysis speed, and enable the plastic waste to be fully pyrolyzed, preventing the plastic waste to be treated from entering the gas-solid separation bin 3 without being pyrolyzed.

[0049] Further, the steam input end 22 and the flat section 24 are connected in the same straight line, i.e. there is no angle at the connection between the steam input end 22 and the flat section 24, and the installation position of the waste input end 21 is closer to the ascending section 25 than the installation position of the steam input end 22. This enables the high-temperature steam from the steam input end 22 to push the plastic waste to be treated from the waste input end 21 to move forward rapidly, and heat the plastic waste to be treated to cause pyrolysis.

[0050] Further, the cross-sectional area of the lower part of the waste input end 21 gradually increases along the feeding direction of the plastic waste to be treated, which can prevent the blockage of the plastic waste to be treated when feeding.

[0051] Preferably, an included angle is arranged between the waste input end 21 and the flat section 24, which can prevent the backflow of the material. The angle of the included angle can be set according to specific conditions, as long as the effect of preventing the backflow of the plastic waste to be treated and enabling the plastic waste to be treated to smoothly enter the pyrolysis tube 2 is achieved.

[0052] Further, the pyrolysis tube 2 is externally provided with a heat insulation layer (not shown in the figure).

[0053] The pyrolysis tube 2 is externally provided with a heat insulation layer, which can significantly reduce the heat exchange between the pyrolysis tube and the external environment during operation, thereby reducing the heat loss and improving the thermal efficiency of the pyrolysis tube. Moreover, the heat insulation layer reduces the temperature of the outer surface of the pipeline and improves the safety.

[0054] Further, the plastic waste pyrolysis equipment further comprises a slag discharge screw 4, the slag output end of the gas-solid separation bin 3 is in communication with the input end of the slag discharge screw 4, and the output end of the slag discharge screw 4 is in communication with the slag bin 5.

[0055] In the technical solution, the residues generated by pyrolysis fall from the slag output end of the gas-solid separation bin 3 to the slag discharge screw 4, and are discharged to the slag bin 5 through the slag discharge screw 4.

[0056] Further, the slag discharge screw 4 is externally provided with a cooling jacket 41, and the cooling jacket 41 contains a cooling medium in the inside, which can cool the high-temperature carbon residues before discharging them into the slag bin 5.

[0057] Preferably, the cooling medium is cooling water, and the cooling jacket 41 is provided with an inlet and an outlet. By flowing the cooling water into the cooling jacket 41, the high-temperature carbon residues after pyrolysis in the pyrolysis tube 2 can be cooled before being discharged into the slag bin 5.

[0058] Further, the plastic waste pyrolysis equipment further comprises a chlorine removal purifier 9, the pyrolysis gas output end of the condenser 6 is in communication with the input end of the chlorine removal purifier 9, and the output end of the chlorine removal purifier 9 is in communication with the pyrolysis gas recovery end of the steam generator 8.

[0059] It is worth noting that the macromolecular organic matter in the plastic waste is decomposed into a small-molecule oil gas mixture, i.e., pyrolysis oil gas, after high-temperature thermal decomposition. In addition, the plastic waste contains a certain amount of water, which is gasified into water vapor after high-temperature treatment. Moreover, the plastic waste is heated and transported by superheated steam in the technical solution. Therefore, the pyrolysis oil gas contains water vapor in addition to the small-molecule oil gas mixture. After the pyrolysis oil gas is condensed by the condenser 6, the molecules with C5 or above in the small-molecule oil gas mixture are condensed into pyrolysis oil, and the non-condensable gas with C5 or below is pyrolysis gas. Both the pyrolysis oil and the pyrolysis gas are mixtures, and the water vapor in the pyrolysis oil gas is condensed into water by the condenser 6. The pyrolysis oil and water enter the oil-water separator 7, so that the pyrolysis oil and water are separated. The pyrolysis gas enters the steam generator 8 after passing through the chlorine removal purifier 9.

[0060] Further, since the waste to be treated may contain PVC, and chlorinated substances such as HCL may be generated in the pyrolysis gas after pyrolysis, the pyrolysis equipment of the technical solution is provided with a dechlorination purifier 9 to remove the chlorinated substances in the pyrolysis gas, which can effectively purify the pyrolysis gas. The pyrolysis gas after dechlorination is delivered to the steam generator 8, and the pyrolysis gas is used as fuel gas in the steam generator 8 to heat water to generate superheated steam. If the pyrolysis gas is not purified and is directly introduced into the steam generator for combustion, dioxin, a very toxic organic compound, may be generated. Therefore, before the pyrolysis gas is burned, it is washed by the alkaline liquid in the dechlorination purifier 9, and after the hydrogen chloride is completely removed, it is burned to avoid the generation of dioxin.

[0061] The technical solution can remove chlorine in the pyrolysis gas and effectively purify the pyrolysis gas by providing the dechlorination purifier 9.

[0062] It should be noted that the dechlorination purifier 9 of the technical solution is known and can be purchased from the market.

[0063] Further, the waste input end 21 is provided with a feed regulator 26.

[0064] Specifically, the waste plastic to be treated from the feed bin 1 enters the pyrolysis tube 2 through the feed regulator 26, which can adjust the amount of waste plastic to be treated entering the pyrolysis tube 2, so as to avoid too much or too little of the waste plastic to be treated entering, thereby making the pyrolysis effect of the waste plastic to be treated better.

[0065] Preferably, the feed regulator 26 is signal connected with an external control center, and under the control of the control center, the amount of waste plastic to be treated entering the pyrolysis tube 2 can be automatically adjusted.

[0066] It should be noted that the feed regulator 26 of the technical solution is known and can be purchased from the market.

[0067] Further, the plastic waste pyrolysis equipment further comprises a sealed feeder 11, and the sealed feeder 11 is installed at the feed inlet of the feed bin 1.

[0068] It is worth noting that the technical solution is provided with a sealed feeder 11 at the feed inlet of the feed bin 1, which can send the waste plastic to be treated into the feed bin 1 while maintaining a sealed state, and can avoid the oil gas generated by pyrolysis in the pyrolysis tube 2 from being discharged through the feed inlet of the feed bin 1.

[0069] It should be noted that the sealed feeder 11 of the technical solution is known and can be purchased from the market.

[0070] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these embodiments will all fall within the protection scope of the present application.

Claims

1. A large-capacity plastic waste pyrolysis apparatus, characterized by, The device comprises a feeding bin, a pyrolysis tube, a gas-solid separation bin, a residue bin, a condenser, an oil-water separator and a steam generator. The pyrolysis tube is provided with a garbage input end, a steam input end and a pyrolysis material output end. The top of the feeding bin is provided with a feeding port for the plastic garbage to be treated to enter, and the discharge end of the feeding bin is communicated with the garbage input end. The steam output end of the steam generator is communicated with the steam input end, and the steam output from the steam output end of the steam generator is used to transport and heat the plastic garbage to be treated, so that the plastic garbage to be treated is pyrolyzed in the interior of the pyrolysis tube.

2. The large-capacity plastic waste pyrolysis apparatus according to claim 1, characterized by, The pyrolysis material output end is communicated with the garbage input end of the gas-solid separation bin, the oil gas output end of the gas-solid separation bin is communicated with the input end of the condenser, the residue output end of the gas-solid separation bin is communicated with the residue bin, the liquid output end of the condenser is communicated with the input port of the oil-water separator, the pyrolysis gas output end of the condenser is communicated with the pyrolysis gas recovery end of the steam generator, the water output port of the oil-water separator is communicated with the waste water recovery end of the steam generator, and the pyrolysis oil output port of the oil-water separator is communicated with an oil tank outside. The pyrolysis tube comprises a gentle section and an ascending section, and the gentle section and the ascending section are communicated in a smooth transition manner. The ascending section has an ascending trend along the advancing direction of the plastic garbage to be treated.

3. The large-capacity plastic waste pyrolysis apparatus according to claim 2, characterized by, The garbage input end and the steam input end are respectively arranged on the side of the gentle section away from the ascending section, and the pyrolysis material output end is arranged on the side of the ascending section away from the gentle section.

4. The large-capacity plastic waste pyrolysis apparatus according to claim 2, characterized by, The steam input end and the gentle section are connected in the same straight line, and the mounting position of the garbage input end is closer to the ascending section than the mounting position of the steam input end.

5. The large-capacity plastic waste pyrolysis apparatus according to claim 1, characterized by, The cross-sectional area of the lower part of the garbage input end gradually increases along the feeding direction of the plastic garbage to be treated.

6. The large-capacity plastic waste pyrolysis apparatus according to claim 1, characterized by, The pyrolysis tube is externally provided with a heat insulation layer.

7. The large-capacity plastic waste pyrolysis apparatus according to claim 6, characterized by, The plastic garbage pyrolysis device further comprises a residue discharging screw, the residue output end of the gas-solid separation bin is communicated with the input end of the residue discharging screw, and the output end of the residue discharging screw is communicated with the residue bin.

8. The large-capacity plastic waste pyrolysis apparatus according to claim 1, characterized by, The residue discharging screw is externally provided with a cooling jacket, and the cooling jacket contains a cooling medium.

9. The large-capacity plastic waste pyrolysis apparatus according to claim 1, characterized by, The plastic garbage pyrolysis device further comprises a chlorine removal purifier, the pyrolysis gas output end of the condenser is communicated with the input end of the chlorine removal purifier, and the output end of the chlorine removal purifier is communicated with the pyrolysis gas recovery end of the steam generator.

10. The large-capacity plastic waste pyrolysis apparatus according to claim 1, characterized by, The garbage input end is provided with a feeding regulator. The plastic garbage pyrolysis device further comprises a sealed feeder, and the sealed feeder is installed at the feeding port of the feeding bin.

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