WO2008131600A1

WO2008131600A1 - A process and a device for continuous cracking waste plastics

Info

Publication number: WO2008131600A1
Application number: PCT/CN2007/001502
Authority: WO
Inventors: Bin Niu
Original assignee: Bin Niu
Priority date: 2007-04-28
Filing date: 2007-05-08
Publication date: 2008-11-06

Abstract

A process and a device for cracking waste plastics, particularly for continuous cracking waste plastics. The continuous cracking can be performed by heating the raw materials with solid heat carriers in the cracking device, wherein the solid heat carriers carrying heat are mixed and go forward with the raw materials. The device comprises a screw feeding unit set in housing, a feed inlet and a inlet of solid heat carriers both set in front of the housing, cracked gas outlet upside of housing, and a outlet of solid heat carriers and solid products at the end of the housing. The cracking of waste plastics can be achieved continuously and automatically by applying the process and device of the present invention. According to the present invention, there are several improvements in exhaust gas treating and reusing. As a result, the requirements of environmental protection can be meet and the cost can be decreased.

Description

Waste plastic continuous cracking process and equipment

The invention relates to a waste plastic cracking process and equipment, in particular to a continuous cracking process and equipment for waste plastics. Background technique

Plastics are bismuth molecular hydrocarbon polymers, which are themselves ruthenium molecular polymers composed of hydrocarbons in petroleum products. Because of their difficulty in naturally degrading in nature, they cause great pollution to the environment. Now, the macromolecular chain of the ruthenium molecular polymer constituting the plastic can be opened by the cleavage method to reduce it to a compound of a small molecular chain. Since the small molecule compound is generally a hydrocarbon component that conforms to the fuel component, it can be fractionated and refined. Get gasoline, diesel and gas, which solves the environmental pollution of waste plastics and has very economic and environmental benefits. It also provides a new way to solve the increasingly serious energy crisis.

However, the existing cracking method generally uses a waste plastic into a reaction vessel at a time, using coal or electricity as a heat source, heating it under the catalysis of the catalyst to crack it, and fractionating and condensing the cracked gas to obtain a crude fuel. The waste plastic can be processed in batches, and the continuous production required by the industry cannot be achieved. The processing speed is slow and the quality of the obtained oil is very low. Because of the direct heating method, the reactor is inflammable and explosive. At the same time, due to the direct heating of the reactor, the reactor will cause excessive loss, reducing the service life of the whole set of equipment and increasing the cost of production; since it is impossible to carry out continuous production, it is impossible to timely and effectively treat the waste residue generated in the production process, resulting in Environmental pollution. In the prior art, although a plurality of waste plastic oiling devices capable of continuous industrial production are provided, the purpose of continuous production can be solved to a certain extent, but the waste plastics are unevenly heated during the cracking process, and the plastic cracking is not completely affected. The final oil yield will also cause some plastics to be heated too quickly and directly burn to form coke residue, which will also affect the normal progress of the cracking reaction, and increase the cost of slag disposal and later treatment of large amounts of waste in the production process. .

Summary of the invention

In order to solve the above problems in the prior art, the present invention provides the following technical solution: It is continuously cracked by heating a raw material by a heat-carrying solid heat carrier stream which is mixed with a raw material and moved in the cracker.

Firstly, in the cracker, direct heating is carried out by using a solid heat carrier fluid carrying heat. During the same movement with the raw material, the raw material is mixed with the solid heat carrier and adhered to the surface, so that the raw material and the solid heat carrier The large area of the body directly contacts and is quickly heated, thereby solving the problem that the waste plastic is unevenly heated due to poor thermal conductivity of the plastic, and the cracking is not complete, and the reaction speed can be increased to achieve rapid cracking. The solid state heat carrier after the completion of the cracking also brings the generated solid matter out of the cracking equipment, and at the same time solves the problem that the solid residue in the cracker is agglomerated into coke residue, which is disadvantageous for industrial continuous production. During the movement of the solid heat carrier, it is also possible to refine the solid residue generated after the cracking to facilitate the later treatment.

In the above process, the solid plastic raw material can be directly sent to the cracking process, but in order to achieve better effect, the raw material is generally preheated to the molten state and then enters the cracking process, so that not only the gas remaining between the waste plastics is discharged, so that The tightness of the entire cracking system is better enhanced, while the molten flow resistance is much less than the solid feedstock, reducing the pressure throughout the propulsion system and reducing cracking time. In particular, since plastic is a poor conductor of heat, preheating it into a molten state can reduce the energy required for cracking, better ensure the continuity of the cracking process, and the molten material is more easily and uniformly attached. On the surface of the solid heat carrier and the thickness of the adhesion is very thin, the cracking reaction is completed in a very short time, which further shortens the time required for the entire reaction, and also provides favorable conditions for industrial continuous production.

The cracking process of the present invention can process a single raw material or a mixed raw material, but when processing a raw material containing PVC, since the HC1 generated after heating causes corrosion to the cracking equipment, it should be cracked by PVC. It is characterized by the removal of HC1 from PVC pyrolysis during the preheating phase. Removal of HC1 can be accomplished by collection or neutralization using alkaline materials or other prior art methods.

In order to realize continuous production by the method of the present invention, the raw material or the preheated molten raw material or the preliminarily removed HC1 treated molten raw material and the solid heat carrier are continuously fed into the cracking process, and the cracking process is continuously discharged. Generated The cracking gas, and after the cracking, continuously discharges the solid heat carrier and the solid product together. The solid heat carrier is separated from the solid state by the cracking process, and the solid residue is sent to the heating furnace and then heated to enter the cracking process. In order to minimize the heat loss after heating, the solid residue is generally generated before heating. Separation of the material, or separation of the solid residue while heating, thus ensuring that the solid heat carrier can carry the greatest heat back to the cracking process. In this process, in addition to the continuous entry of the raw materials and the continuous derivation of the product, the continuous use of the solid heat carrier is realized, thereby achieving the continuous progress of the entire cracking process.

Since the mixture of the solid heat carrier and the raw material or the molten material has a large resistance to movement, an external force should be applied to ensure the movement or flow thereof, which can be realized by a tilting rotating shell or the like, or can be realized by a screw propulsion mechanism. In addition to pushing the raw material and the solid heat carrier, this method can simultaneously stir the mixture to make the material more uniform and accelerate the cracking, thereby promoting the complete cracking of the raw material.

The cracking gas generated by the cracking may be further subjected to catalytic cracking through a fixed catalytic bed or other means, and then enters the fractionating tower for branching, and the oils of different components obtained by fractional distillation are condensed by the condensation tower and then adjusted by different processes to obtain various comparisons. High-quality light oil; for the non-condensable gas can be used as fuel in the heating furnace to heat the solid heat carrier, which can not only use the non-condensable flammable gas generated by the cracking, which saves the production cost, 'also avoids In order to further meet the environmental requirements, the environmental pollution caused by the direct discharge of these gases can be desulfurized and purified before the non-condensable gas is burned.

In the heating furnace, the solid heat carrier is heated, and the cracked residual combustibles adhering to the surface are rapidly burned, and the incombustible matter and the ash are discharged out of the combustion furnace with the flue gas generated after the combustion, in order to achieve the purpose of harmless discharge, The flue gas needs to be removed by the dust removal equipment, and the residual ash and incombustible materials can be reused as building materials because the particles are extremely small, and the flue gas passing through the dust removal equipment still contains a large amount of heat energy, so the raw materials can be utilized. Preheating is carried out. In the specific process, the raw materials may be preheated directly, or may be preheated by a heat medium after heat exchange with a heat transfer oil or other heat medium. This process further refines the process of the present invention to achieve standards for harmless emissions and to avoid environmental pollution.

The solid heat medium in the present invention can select different materials according to the melting point and specific heat capacity of the material, and it is required to ensure that it is solid when it is higher than the cracking temperature, and the specific shape is not limited. In the specific use, the sphere, especially the metal sphere, can be used. The spherical heat carrier can also maximize the contact area between the heat carrier and the raw material, thereby maximizing the progress of the cracking reaction, but if the diameter of the sphere is too large This will cause too much void between the ball and the ball to affect the seal of the cracker, so the diameter of the thermal ball is controlled at 5-25, which can maximize the contact area while ensuring the seal. The solids used in the solid heat carrier have a melting point higher than that required for plastic cracking.

In order to ensure the thoroughness of the cracking reaction and ensure the time required for the cracking, it is necessary to ensure the maximum contact area and moderate time between the molten waste plastic and the solid heat carrier, since the effect of the heat conductive ball is better than other solid heat carriers. Body, therefore control: 30-50 tons of heat-conducting ball per ton of raw material per hour, so that the reaction time can be shortened while ensuring the cracking effect; In order to ensure the smooth progress of the cracking reaction, the temperature control of the heat-conductive ball entering the cracker It can be between the upper and lower limits of the plastic cracking required.

At the inlet of the raw material, the gas contained in the raw material is discharged after being spirally extruded, and at the same time, the raw material itself is accumulated, and the discharge of the gas can be ensured to ensure the sealing at the time of feeding; at the inlet of the solid heat carrier, the solid heat carrier will It is piled up in a large amount and the gap between them is small, which ensures the discharge of the gas to complete the sealing. At the outlet of the solid heat carrier, the spiral propulsion is also adopted, so that it can be further based on the accumulation of the hot body itself. The heat carrier is pressed to ensure a seal with the outside world. Through the above sealing process, the entire cracking process is in a sealed environment to ensure the smooth progress of the cracking process and to ensure that there is no danger of explosion and explosion during the production process.

By adopting the waste plastic cracking process of the invention, the cracking of the waste plastic can be industrially continuous production, so that the processing speed and the quality of the oil obtained by the cracking are greatly improved, because the solid heat carrier is used as the loading. The hot body not only ensures the equilibrium of the cracking temperature during the reaction, but also greatly increases the heating area of the waste plastic, so that the cracking reaction can be carried out more stably and quickly, and at the same time, the heating efficiency of the solid heat carrier is higher than that of the direct heating. It is much higher, so the energy required for heating is much less than the direct heating method, saving energy. Since the heating fuel used in the present invention is non-condensable gas generated by self-cracking, recycling thereof is used to save the production cost and reduce the cost. Non-condensable direct discharge of environmental pollution, achieving the standard of industrial continuous and harmless production.

The cracking apparatus for realizing the invention comprises a casing, a spiral propulsion mechanism is arranged in the casing, a feeding port and a solid heat medium input port are arranged at the front part, a cracking gas outlet is arranged at the upper part, and a solid heat medium and a solid body are arranged at the rear part. Product exit. The device is capable of propelling a mixture of raw materials and solid heat carriers to complete the cracking during its movement.

Since the cracking gas is generated during the cracking process, vent holes should be provided on the blades of the screw propulsion mechanism to guide the cracking gas for discharge; and the air pressure between the spiral blades can be reduced to ensure the safety and stability of the working environment.

Since the raw material and the solid heat medium in the cracker are relatively heavy and viscous, the movement resistance is large, and the edge of the spiral propulsion mechanism can be set to be bent toward the material advancing direction, which is turned and strengthened. effect. Since the structure can achieve agitation of the raw material, help to achieve sufficient cracking, and prevent the solid heat carrier from being squeezed at the edge of the blade to ensure the normal operation of the equipment.

In order to achieve continuous cracking, it is necessary to ensure the sealing of all parts of the cracker. The sealing of the inlet and outlet of the raw materials can be achieved by the prior art. In order to achieve the best effect, the invention adopts the use of the raw material at the inlet of the raw material. The material is sealed and the dynamic heat sealing and the material stack sealing are adopted at the inlet of the solid heat medium, and the solid heat carrier conveying bucket with the inclined opening is arranged at the feeding port, in particular, the opening can be adopted. Increasing anti-bridge eccentric transport bucket, this structure enables the solid heat carrier to be stacked at the input port to achieve sealing.

In the present invention, the heating of the solid heat medium is completed by a furnace connected to the inlet of the solid heat carrier bucket, and the furnace includes a heating chamber with a spiral passage, and the bottom of the spiral heating chamber is connected to the residue through the screen. The inlet of the upper end of the spiral heating chamber is connected to the solid heat carrier and the solid product outlet on the cracker casing. Heating of the solid heat carrier can be achieved by direct firing. If the desired temperature is reached, the direct burn can be done in one pass or through multiple stages of heating. For example, there is a tilted heating channel with an oil vapor heater between the spiral heating chamber and the solid heat carrier bucket. Here, the solid heat carrier is directly burned to raise its temperature. In this configuration, there is an inclined heating passage with an oil/gas heater between the spiral heating chamber and the solid heat carrier bucket. Thus, two or more cavities are formed in the inclined heating passage so that hot air can be swirled therein to sufficiently heat the solid heat medium.

The sealing structure of the feeding port and the solid product discharging port of the device of the invention may be the prior art, or the following structure may be adopted: a conveying pipe is respectively connected to the feeding port and the solid product discharging port, The conveying pipe is provided with a spiral propulsion mechanism cavity; the conveying pipe connected to the feeding port is a cavity with an inlet and an outlet, and the spiral propulsion mechanism in the conveying pipe is a structure with a gradually smaller pitch. This structure ensures the sealing effect of the cracker, and the structure of the feed port conveying pipe can preheat the heat carrier while entering the cracker, so that the raw material can be molten when entering the cracker, so that The cracking is completed quickly, the equipment input of the cracker itself is reduced, the cost is reduced, and the utilization of waste heat in the flue gas generated during the operation of the heating furnace can be realized, so that the entire process and equipment of the present invention are more perfect.

The invention realizes continuous production and automation of plastic cracking by using reasonable and efficient process and equipment. Moreover, the process has been improved in many aspects such as exhaust gas treatment and utilization, enabling it to meet environmental protection requirements and achieve cost reduction.

DRAWINGS

1 is a process flow diagram of process examples 1 and 7;

Figure 2 is a structural view of a cracker device in the apparatus embodiment 18;

Figure 3 is a B-direction view of Figure 2;

Figure 4 is an A-A view of Figure 2;

Figure 5 is a cross-sectional view showing the structure of a heating device in the apparatus embodiment 18;

Figure 6 is a partial cross-sectional view showing a top view of the heating device in the apparatus embodiment 18;

Among them, 1, the outer casing, 2, the feed inlet, 3, the cracking gas outlet, 4, the spiral propulsion mechanism, 5, the vent hole, 6, the anti-sweeping spiral, 7, the solid heat carrier and the solid product outlet, 8, Solid heat input port, 9, oil/gas heater, 10, guiding screw, 11, rotating belt, 12, spiral heating chamber, 13, flue gas outlet, 14, solid heat carrier inlet, 15, screen 16, butterfly valve, 17, residue storage bucket, 18, refractory board, 19, inclined heating channel, 20, solid heat carrier conveyor, 21, solid heat carrier outlet, 22, inspection port.

detailed description Process Example 1:

The waste plastic is pretreated and placed in a preheating system for preheating to melt, and then absorbed by the alkaline absorption tower to produce HC1, and the molten waste plastic is introduced into the cracker at a rate of 1 ton per hour. Adding a conventional plastic cracking catalyst, the heat-conducting ball moves in the same direction as the waste plastic in the cracker and mixes to crack the waste plastic. The amount of heat per hour is 40 tons, the diameter of the heat-conducting ball is 10-20, and the temperature is 380-500 °C. The cracker provides power for the co-directional movement of the raw material and the solid heat carrier by the screw propulsion mechanism, and mixes the heat conductive ball and the molten waste plastic; the cracked gas is subjected to secondary cracking through the fixed catalytic bed, and the secondary cracking gas Through the fractionation tower, the obtained fraction is condensed and adjusted to obtain oils such as gasoline and diesel oil; the unconfirmed gas after condensation is purified and sealed, and then passed into a heat-conducting ball furnace for combustion while being separated from the solid state of the cracker by the screen separation and the heat-conducting ball. The product, the high-temperature flue gas after combustion is dedusted by a dust removing device, and the obtained dust is compressed and processed as a building material, and is passed through a dust removing device. The gas enters the heat exchanger and transfers the heat to the raw material preheating system through the heat transfer oil. Finally, the flue gas is vented through the multistage purification device; the heat conducting ball is heated to 380-500 ° C in the heating furnace and then sealed through the cracker. The delivery device is returned to the cracker. Sealing is carried out by spiral variable pitch extrusion at the inlet of the molten waste plastic. Sealing is carried out by self-stacking of the heat conducting ball at the entrance of the heat conducting ball, and the screw is pushed at the outlet of the heat conducting ball and sealed by the accumulation of the heat conducting balls at the port. Other equipment and technologies use existing technology.

Process Example 2:

The waste plastic is placed in a preheating system for preheating to be melted, and then absorbed by the alkaline absorption tower to produce HC1, and the molten waste plastic is introduced into the cracker at a rate of 1.5 tons per hour, ceramic balls. At a speed of 44 tons per hour, it is introduced into the cracker in the same direction as the waste plastic and mixed with it to crack the waste plastic. The temperature of the ceramic ball is 400_460 °C, and the co-rotation mechanism uses the screw propulsion mechanism as the raw material and the ceramic ball to move in the same direction. Providing power; the gas obtained by cracking passes through the branching tower, and the obtained fraction is condensed and adjusted to obtain oils such as gasoline and diesel; the condensed non-condensable gas is passed into a solid heat medium heating device for combustion, and is burned and passed through a multi-stage purification device. air. Other equipment and technologies use existing technology.

Process Example 3:

The waste plastic is introduced into the cracker at a rate of 0.5 tons per hour, and a catalyst is added at the same time. The solid heat medium is introduced into the cracker in the same direction as the waste plastic at a rate of 30 tons per hour and mixed with the waste plastic to cause waste plastic to occur. Pyrolysis, the temperature of the solid heat carrier is 420-44 (TC, the co-orientation of the raw material and the solid heat carrier is powered by the screw propulsion mechanism in the cracker; the cracked gas is subjected to secondary cracking through the fixed catalytic bed, and the secondary cracking gas Through the fractionation tower, the obtained fraction is condensed and adjusted to obtain gasoline, diesel oil and the like; the condensed non-condensable gas is purified and sealed, and then passed into a solid heat medium heating device for combustion, and the solid heat carrier is separated by a sieve before being heated. With the solid product discharged from the cracker together, the high-temperature flue gas after combustion is dedusted by the dust removing device, and the dust is collected for use, and the flue gas passing through the dust removing device enters the heat exchanger to transfer heat to the raw material preheating system through the heat transfer oil, and finally The flue gas is vented after passing through the multi-stage purification device, and the solid heat carrier is heated and sent back to the cracking through a conveying device that is sealed and connected to the cracker. Within Other prior art equipment and techniques employed.

Process Example 4:

The waste plastic is placed in a preheating system for preheating to melt, and then the HC1 is absorbed by the alkaline absorption tower, and the molten waste plastic is introduced into the cracker at a rate of 1 ton per hour while adding the catalyst. The solid heat carrier is fed into the cracker at the rate of 30 tons per hour and mixed with the waste plastic to crack the waste plastic. The temperature of the solid heat carrier is 350-44 CTC, and the screw is propelled into the cracker. The solid heat carrier provides power to the co-directional movement; the gas obtained by the cracking passes through the fractionation tower; the non-condensable gas obtained after the condensation of the fraction is passed into the solid heat medium heating device for combustion, and the flue gas obtained by the combustion enters the heat exchanger to transfer the heat to the raw material for preheating The device, after the flue gas is exhausted through the multi-stage purification device. Other equipment and technologies use existing technology.

Process Example 5:

The waste plastic is introduced into the cracker at a rate of 2 tons per hour. The heat transfer ball is introduced into the cracker at the speed of 60 tons per hour and is uniformly mixed with the waste plastic to cause the waste plastic to be cracked. The diameter of the heat conductive ball is 5- 15mm, temperature is 410-440, the coordinator provides power for the co-directional movement of the raw material and the solid heat carrier through the screw propulsion mechanism; the cracked gas is subjected to secondary cracking through the fixed catalytic bed, and the secondary cracking gas passes through the fractionation tower. The obtained fraction is condensed and adjusted to obtain oil such as gasoline and diesel oil; the condensed non-condensable gas is purified by sealing treatment and then passed into a heat-conducting ball heating furnace, and the heat-conducting ball is heated in the heating furnace to 415-445 ° C and then passed through the conveying device. Returned to the cracker, the high temperature flue gas after combustion is removed The dust is removed from the dust equipment, and the obtained dust is compressed as a building material. The flue gas from the dust removal device enters the heat exchanger and transfers the heat to the raw material preheating device through the heat transfer oil. Finally, the flue gas is evacuated through the multi-stage purification device. Other equipment and technologies use existing technology.

Process Example 6:

The waste plastic is placed in a preheating system for preheating to melt, and the molten waste plastic is introduced into the cracker at a rate of 0.5 tons per hour. The solid heat carrier is at a rate of 24 tons per hour and waste. The plastic is introduced into the cracker in the same direction and mixed with it to crack the waste plastic. The gas obtained by cracking is subjected to secondary cracking through a fixed catalytic bed, and the secondary cracking gas is passed through a fractionation tower, and the obtained fraction is condensed and adjusted to obtain oils such as gasoline and diesel. The condensed non-condensable gas is burned into the solid heat medium heating device, and the heated solid heat medium is sent back to the cracker through a conveying device sealed and connected with the cracker, and the burned high-temperature flue gas is dusted by the dust removing device. After emptying. Other equipment and technologies use existing technology.

Process Example 7:

The waste plastic is pretreated and placed in a preheating system for preheating to melt, and then absorbed by the alkaline absorption tower to produce HC1. The molten waste plastic is introduced into the cracker at a rate of 3 tons per hour. The catalyst is added, and the solid heat medium is introduced into the cracker in the same direction as the waste plastic at a rate of 80 tons per hour, and mixed with the waste plastic to crack the waste plastic. The temperature of the solid heat medium is 400-420 ° C, and the spiral is passed through the cracker. The propulsion mechanism provides power for the co-directional movement of the raw material and the solid heat carrier; the cracked gas is subjected to secondary cracking through a fixed catalytic bed, and the secondary cracked gas is passed through a fractionation tower, and the obtained fraction is condensed and adjusted to obtain oils such as gasoline and diesel; After condensation, the non-condensable gas is cleaned and sealed, and then passed into a solid heat medium heating device for combustion. The high-temperature flue gas after combustion is dedusted by a dust removing device, and the obtained dust is compressed and processed as a building material, and the flue gas of the dust removing device enters the heat exchange. The heat is transferred to the raw material preheating device through the heat transfer oil, and finally the flue gas is exhausted through the multistage purification device; the solid heat medium is heated before being heated Screen discharged together therewith separated solid biomass into a cracker product, the solid heating medium is heated and returned through a delivery means for sealing the cracker connected to the cracker. Sealing is carried out at the inlet of the molten waste plastic by variable pitch screw extrusion, sealing is carried out at the inlet of the solid heat carrier by the material itself, and the spiral is propelled at the outlet of the solid heat carrier and the material at the port is sealed. . Other equipment and technologies use existing technology.

Process Example 8:

The waste plastic is placed in a preheating system for preheating to melt, and the molten waste plastic is introduced into the cracker at a rate of 1.5 tons per hour while adding a catalyst, and the solid heat carrier is 60 tons per hour. The speed is communicated with the waste plastic in the same direction and mixed with the cracker to crack the waste plastic. The auger provides power to the co-directional movement of the raw material and the solid heat carrier through the screw propulsion mechanism and accelerates the uniform mixing; The fractionation tower is condensed and adjusted to obtain oils such as gasoline and diesel oil; the non-condensable gas after condensation is burned, and the high-temperature flue gas after combustion is dedusted by a dust removing device, and the obtained dust is compressed and processed as a building material, and the dust removing device is passed through the dust removing device. The flue gas is vented through a multi-stage purification unit. Other equipment and technologies use existing technology.

Process Example 9 _:

The waste plastic is pretreated, placed in a preheating system, preheated to a molten state, and then absorbed by the alkaline absorption tower to produce HC1, and the molten waste plastic is introduced into the cracker at a rate of 0.8 tons per hour. The solid heat carrier is fed into the cracker at the same speed of 40 tons per hour and mixed with the waste plastic to crack the waste plastic. The temperature of the solid heat carrier is 380-400 ° C, and the cracker is 10 degrees from the horizontal plane. The angle between the solid heat carrier and the raw material moves in the same direction under the action of gravity; the gas obtained by cracking is subjected to secondary cracking through a fixed catalytic bed, and the secondary cracked gas passes through the fractionation tower, and the non-condensed gas after condensation is directly introduced into the solid load. The hot body heating device is burned, in order to ensure the sealing of the combustion process, the non-condensable gas is sealed before entering the solid heat medium heating device, and the high-temperature flue gas after combustion is dusted by the dust removing device, and the obtained dust is compressed and processed as a building material. The flue gas of the dust removal device enters the heat exchanger to transfer heat to the raw material preheating system through the heat transfer oil, and finally the flue gas is evacuated through the multistage purification device; the solid heat carrier is heated At the same time, the solid product discharged from the cracker is separated through the screen, and the heated solid heat medium is sent back to the cracker through a conveying device sealed to the cracker. Other equipment and technologies use existing technology.

Process Example 10 _:

2吨的体积。 The waste plastics were placed in a preheating system to preheat the molten plastic, the molten plastic waste was 1. 2 tons per hour. The rate is fed into the cracker and the catalyst is added at the same time. The solid heat carrier is fed into the cracker in the same direction as the waste plastic at a rate of 60 tons per hour and mixed with it to crack the waste plastic. The cracker is made of a spiral propulsion mechanism. Powering and accelerating the co-directional movement of the solid heat carrier; the cracked gas is subjected to secondary cracking through a fixed catalytic bed, and the secondary cracking gas is passed through a fractionation column, and the obtained fraction is condensed and adjusted to obtain oils such as gasoline and diesel; After the non-condensing gas is emptied, the solid heat carrier is heated by a heat transfer oil. Other equipment and technologies use existing technology.

Process Example 11 - Putting waste plastic into a preheating system for preheating to melt, and then absorbing HC1 produced by an alkaline absorption tower, and the molten waste plastic is introduced into the cracker at a rate of 1 ton per hour. At the same time, the catalyst is added, and the solid heat carrier is introduced into the cracker at the same speed of 30 tons per hour and mixed with the waste plastic to crack the waste plastic. The temperature of the solid heat carrier is 380-440 Ό, and the cracker is at the horizontal plane. The angle of 15 degrees makes the solid heat carrier and the raw material move in the same direction under the action of gravity; the gas obtained by cracking is subjected to secondary cracking through a fixed catalytic bed, and the secondary cracking gas passes through the branching tower, and the obtained fraction is condensed and adjusted to obtain gasoline. Oil such as diesel oil; the non-condensable gas after condensation is cleaned and sealed, and then passed into the solid heat medium heating device for combustion. The burnt flue gas enters the heat exchanger to transfer heat to the raw material preheating system, and finally the flue gas passes through The stage purification device is evacuated; the heated solid heat carrier is returned to the cracker through a conveyor connected to the cracker. Other equipment and technologies use existing technology.

Process Example 12:

The waste plastic is placed in a preheating system for preheating to melt, and then absorbed by the alkaline absorption tower to produce HC1. The molten waste plastic is introduced into the cracker at a rate of 3 tons per hour. The solid heat carrier The waste plastic is pulverized at the rate of 85 tons per hour and mixed with the waste plastic in the same direction, and the waste plastic is lysed by the screw propulsion mechanism. The pyrolysis mechanism supplies power to the co-directional movement of the raw material and the solid heat medium; The catalytic tower is subjected to secondary cracking. The solid heat medium is heated as a heating fuel in a separate heating furnace. Other equipment and technologies use existing technology.

Process Example 13:

The waste plastic is placed in a preheating system for preheating to melt, and the molten waste plastic is introduced into the cracker at a rate of 1.2 tons per hour. The heat transfer ball is at the same speed as 40 tons per hour. The waste plastic is cracked by being introduced into the cracker and mixed with it. The heat transfer ball has a diameter of 15-25 mm and the temperature is 410-430 Ό. The cracked gas is subjected to secondary cracking through the catalytic tower, and the secondary cracked gas passes through the fractionation column, and the fraction is condensed. The non-condensable gas obtained after the purification is sealed and collected for use, and the heat conducting ball is heated to 425-430'C by hot air. Other equipment and technologies use existing technology.

Process Example 14:

The waste plastic is placed in a preheating furnace for preheating to be molten, and then the HC1 is absorbed by the alkaline absorption tower, and the molten waste plastic is introduced into the cracker at a rate of 1 ton per hour while adding the catalyst. The solid heat carrier is fed into the cracker at the same speed of 50 tons per hour and mixed with the waste plastic to crack the waste plastic. The temperature of the solid heat carrier is 380-390 ° C; the cracker is 10 degrees from the horizontal plane. The angle causes the solid heat carrier and the raw material to move under the action of gravity; the gas obtained by the cracking is subjected to secondary cracking through the fractionation tower, and the secondary cracking gas is passed through the fractionation tower, and the obtained fraction is adjusted to obtain oil such as gasoline and diesel; After the non-condensable gas is directly injected into the solid heat medium heating device for combustion, the high-temperature flue gas after combustion is dedusted by the dust removing device, and the obtained dust is compressed and processed as a building material, and the flue gas passing through the dust removing device is evacuated through the multi-stage purification device. The solid heat medium is heated while passing through the screen to separate the solid product discharged from the cracker together, and the heated solid heat medium passes through A delivery device that is sealingly coupled to the cracker is returned to the cracker. Other equipment and technologies use existing technology.

Process Example 15: '

The waste plastic is placed in a preheating system for preheating to melt, and then the HC1 is absorbed by the alkaline absorption tower, and the molten waste plastic is introduced into the cracker at a rate of 1 ton per hour. The solid heat carrier The waste plastic is cracked at the rate of 45 tons per hour and mixed with the waste plastic. The temperature of the solid heat carrier is 450-500 ° C. The screw is propelled into the raw material and solid state. The hot body provides power and accelerates the mixing movement; the gas obtained by the cracking passes through the fractionation tower, and the obtained fraction is condensed and adjusted to obtain oils such as gasoline and diesel oil; the non-condensed gas after condensation is purified and sealed, and then introduced into the solid heat carrier. The heating device burns, and the burnt flue gas is dedusted by the dust removing device, and the obtained dust is compressed and processed as a building material, and the flue gas passing through the dust removing device enters the heat exchanger to transfer the heat to the heat transfer oil to the heat exchanger. The raw material preheating device, and finally the flue gas is vented after passing through the multi-stage purification device. Other equipment and technologies use existing technology. Process Example 16:

The waste plastic is placed in a preheating system for preheating to melt, and then the HC1 is absorbed by the alkaline absorption tower, and the molten waste plastic is introduced into the cracker at a rate of 1 ton per hour while adding the catalyst. The thermal ball is passed into the cracker at the speed of 34 tons per hour and mixed with the waste plastic to cause the waste plastic to be cracked. The diameter of the heat conducting ball is 5-20mm. The screw is propelled into the same direction by the spiral propulsion mechanism. The motion provides power; the gas obtained by cracking is subjected to secondary cracking through a fixed catalytic bed, and the secondary cracking gas is passed through a fractionation tower, and the obtained fraction is condensed and adjusted to obtain oils such as gasoline and diesel; the non-condensed gas after condensation is directly introduced into the solid load. The hot body heating device burns, the high-temperature flue gas after combustion enters the heat exchanger to transfer the heat to the raw material preheating system, and finally the flue gas is exhausted through the multi-stage purification device; the heat conducting ball is heated in the heating furnace to the lower limit temperature of the plastic cracking It is returned to the cracker by means of a conveyor connected to the cracker. Other equipment and technologies use existing technology.

Process Example 17:

The above-mentioned examples of the inlet and outlet materials and the solid heat carrier seals used in the examples other than Examples 1 and 7 are both prior art, in order to achieve a more sealing effect for the examples other than 1 and 7, in the raw materials. The inlet is preheated and the spiral variable pitch extrusion is used to compact the raw material to achieve sealing. At the inlet of the solid heat carrier, the solid heat carrier is squeezed and sealed to each other, and the spiral is used at the outlet of the solid heat carrier. Advance causes the solid heat carriers to be pushed forward against each other and gathered at the ports to effect sealing.

The equipment structure used in the cracking process of the present invention is as follows - Apparatus Example 1 :

The embodiment comprises a cracker casing, and a screw propulsion mechanism is arranged in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and solid product at the other end. Export.

In use, the raw material continuously enters the outer casing from the feed port and continuously moves under the push of the screw propulsion mechanism. In the process, the solid heat carrier continuously entering from the input port of the solid heat carrier is mixed with the raw material, and the raw material is mixed with the raw material. Heat is applied to complete the cracking. The cracked gas generated after the cracking is continuously discharged from the cracker outlet, and the generated solid matter and the solid heat carrier are continuously discharged. Other parts of this embodiment employ the prior art.

This embodiment can also be used in a discontinuous cracking process.

Equipment Example 2 _:

The embodiment includes a cracker casing, and a spiral propulsion mechanism is disposed in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and a solid product outlet at the other end. There are vent holes in the blades of the propeller mechanism. Other parts of this embodiment employ the prior art.

In use, the raw material continuously enters the cracker from the feed port and is continuously driven by the screw propulsion mechanism. In the process, the solid heat medium continuously entering from the input port of the solid heat medium is mixed with the raw material, and The raw material is heated to complete the cracking. The cracked gas generated after the cracking is continuously discharged from the cracker outlet, and the generated solid matter and the solid heat carrier are continuously discharged. The venting holes in the blades of the auger mechanism are used to derive the cracking gas between the blades, thereby improving the safety of the operation of the equipment.

Equipment Example 3:

The embodiment comprises a cracker casing, and a screw propulsion mechanism is arranged in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and solid product at the other end. Export. The blades of the auger mechanism have edges that are bent toward the advancement direction of the material. Other parts of this embodiment employ the prior art.

Compared with the apparatus embodiment 1, the embodiment improves the blade of the propulsion mechanism to promote the movement and mixing of the raw material and the solid heat carrier, improve the cracking efficiency, and improve the cracking effect.

Equipment Example 4:

The embodiment comprises a cracker casing, and a screw propulsion mechanism is arranged in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and solid product at the other end. Export. The solid-state heat medium input port is provided with an anti-bracket eccentric conveying bucket with an enlarged opening. Other parts of this embodiment adopt existing Technology.

On the basis of Embodiment 1, this embodiment further improves the structure at the input port of the solid heat carrier, thereby achieving the sealing there with a reasonable structure.

Equipment Example 5:

The embodiment comprises a cracker casing, and a screw propulsion mechanism is arranged in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and solid product at the other end. Export. The inlet of the solid heat carrier bucket is terminated with a heating furnace, and the furnace comprises a heating chamber with a spiral passage, and the bottom of the spiral heating chamber is connected to the residue storage tank through a screen. The inlet at the upper end of the spiral heating chamber is connected to the solid heat carrier and the solid product outlet on the cracker housing. Other parts of this embodiment employ the prior art.

In this embodiment, a solid-state heat medium heating mechanism of a new structure is adopted, which can help to realize the continuous completion of the cracking process, and simultaneously remove the cracked product adhered thereto during the heating process of the solid heat medium. .

Equipment Example 6:

The embodiment includes a cracker casing, and a spiral propulsion mechanism is disposed in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and a solid product outlet at the other end. There are vent holes in the blades of the propeller mechanism. The blades of the auger mechanism have edges that are bent toward the advancement direction of the material. Other parts of this embodiment employ the prior art.

Equipment Example 7:

The embodiment comprises a cracker casing, and a screw propulsion mechanism is arranged in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and solid product at the other end. Export. The blades of the auger mechanism have edges that are bent toward the advancement direction of the material. The solid-state heat medium input port is provided with an anti-bridge eccentric conveying bucket with an enlarged opening. Other parts of this embodiment employ the prior art.

Equipment Example 8:

The embodiment comprises a cracker casing, and a screw propulsion mechanism is arranged in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and solid product at the other end. Export. A vent is provided in the blade of the auger mechanism. The inlet of the solid heat carrier bucket is terminated with a heating furnace, and the heating furnace comprises a heating chamber with a spiral passage, the bottom of the spiral heating chamber is connected to the residue storage tank through the screen, and the inlet of the upper end of the spiral heating chamber is connected to the cracker casing. Solid heat carrier and solid product outlet. Other parts of this embodiment employ the prior art.

Equipment Example 9:

The embodiment comprises a cracker casing, and a screw propulsion mechanism is arranged in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and solid product at the other end. Export. The blades of the screw propulsion mechanism are provided with vent holes. The solid-state heat medium input port is provided with an anti-branching eccentric conveying hopper having an enlarged opening. Other parts of this embodiment employ the prior art.

Equipment Example 10:

The embodiment includes a casing, and a spiral propulsion mechanism is disposed in the casing. The casing is provided with a feeding port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and a solid product outlet at the other end. . The blades of the screw advancement mechanism have edges that are bent toward the advancement direction of the material. The inlet of the solid heat carrier bucket is terminated with a heating furnace, and the heating furnace comprises a heating chamber with a spiral passage, the bottom of the spiral heating chamber is connected to the residue storage tank through the screen, and the inlet of the upper end of the spiral heating chamber is connected to the cracker casing. Solid heat carrier and solid product outlet. Other parts of this embodiment employ the prior art.

Equipment Example 11:

The embodiment comprises a cracker casing, and a screw propulsion mechanism is arranged in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and solid product at the other end. Export. The input port of the solid heat medium is provided with a solid-state heat carrier bucket with an enlarged opening, which adopts an eccentric structure, and the angle thereof can prevent the phenomenon of material bridging. The inlet of the solid heat carrier bucket is terminated with a heating furnace, and the heating furnace comprises a heating chamber with a spiral passage, the bottom of the spiral heating chamber is connected to the residue storage tank through the screen, and the inlet of the upper end of the spiral heating chamber is connected to the cracker casing. Solid heat carrier and solid product outlet. Other parts of this embodiment employ the prior art. Device Example 12:

The embodiment includes a cracker casing, and a spiral propulsion mechanism is disposed in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and a solid product outlet at the other end. There are vent holes in the blades of the propeller mechanism. The blades of the auger mechanism have edges that are bent toward the advancement direction of the material. The solid-state heat medium input port is provided with an anti-bracket eccentric conveying bucket with an enlarged opening. The other parts of this embodiment employ the prior art.

Equipment Example 13:

The embodiment includes a cracker casing, and a spiral propulsion mechanism is disposed in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and a solid product outlet at the other end. There are vent holes in the blades of the propeller mechanism. The edge of the blade of the auger mechanism has an edge that is bent toward the advancement direction of the material. The inlet of the solid heat carrier conveying bucket is connected to the heating furnace, and the heating furnace comprises a heating chamber with a spiral passage, the lower bottom of the spiral heating chamber is connected to the residue storage tank through the screen, and the inlet of the upper end of the spiral heating chamber is connected to the cracker casing. Solid heat carrier and solid product outlet. Other parts of this embodiment employ the prior art.

Equipment Example 14:

The embodiment includes a cracker casing, and a spiral propulsion mechanism is disposed in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and a solid product outlet at the other end. The blades of the screw advancement mechanism have edges that are bent toward the advancement direction of the material. The solid-state heating body input port is provided with an anti-bracket eccentric conveying hopper having an enlarged opening. The inlet of the solid heat carrier bucket is terminated with a heating furnace, the furnace comprises a heating chamber with a spiral passage, the lower bottom of the spiral heating chamber is connected to the residue storage tank through a screen, and the inlet of the upper end of the spiral heating chamber is connected to the cracker casing. Solid heat carrier and solid product outlet. Other parts of this embodiment employ the prior art.

Equipment Example 15:

The embodiment includes a cracker casing, and a spiral propulsion mechanism is disposed in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and a solid product outlet at the other end. There are vent holes in the blades of the propeller mechanism. The blades of the auger mechanism have edges that are bent toward the advancement direction of the material. A solid-state heat carrier bucket is disposed at the input port of the solid heat carrier, and the solid heat carrier bucket is an eccentric structure of the anti-frame bridge with an enlarged opening, wherein the portion adjacent to the input port of the solid heat carrier and the solid heat carrier The input port is axially uniform, and the angle between the other portion and the vertical direction is smaller than the angle between the aforementioned portions. The inlet of the solid heat carrier conveying bucket is connected to the heating furnace, and the heating furnace comprises a heating chamber with a spiral passage, the bottom of the spiral heating chamber is connected to the residue storage tank through the screen, and the inlet of the upper end of the spiral heating chamber is connected to the cracker casing. Solid heat carrier and solid product outlet. Other parts of this embodiment employ the prior art.

Equipment Example 16:

The embodiment includes a cracker casing, and a spiral propulsion mechanism is disposed in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and a solid product outlet at the other end. There are vent holes in the blades of the propeller mechanism. The edge of the blade of the auger mechanism is bent toward the advancement direction of the material. A solid-state heat carrier bucket is disposed at the input port of the solid heat carrier, and the solid heat carrier bucket is an eccentric structure of the anti-frame bridge with an enlarged opening, wherein the portion adjacent to the input port of the solid heat carrier and the solid heat carrier The input port is axially uniform, and the angle between the other portion and the vertical direction is smaller than the angle between the aforementioned portions. The inlet of the solid heat carrier conveying bucket is connected to the heating furnace, and the heating furnace comprises an oil/gas heating chamber with a spiral passage, the lower bottom of the spiral heating chamber is connected to the residue storage tank through the screen, and the inlet of the upper end of the spiral heating chamber is connected to the cracker. Solid heat carrier and solid product outlet on the outer casing. There is an inclined heating passage with an oil/gas heater between the spiral heating chamber and the solid heat carrier bucket. Other parts of this embodiment employ the prior art.

Equipment Example 17:

The embodiment includes a cracker casing, and a spiral propulsion mechanism is disposed in the casing. The casing is provided with a feed port and a solid heat medium input port at one end, a cracking gas outlet at the upper portion, and a solid heat carrier and a solid product outlet at the other end. The solid-state heat medium input port is provided with an anti-bracket eccentric conveying bucket with an enlarged opening. The inlet of the solid heat carrier conveying bucket is connected to the heating furnace, and the heating furnace comprises a heating chamber with a spiral passage, the bottom of the spiral heating chamber is connected to the residue storage tank through a screen, and the inlet of the upper end of the spiral heating chamber is connected to the cracker casing. Solid heat carrier and solid product outlet. There is an inclined heating passage with an oil/gas heater between the spiral heating chamber and the solid heat carrier bucket. Other parts of this embodiment employ the prior art. Apparatus Example 18:

The embodiment includes a cracker casing 1 in which a screw propulsion mechanism 4 is disposed. The outer casing 1 is provided with a feed port 2 and a solid heat medium input port 8 at one end, a cracking gas outlet 3 at the upper portion, and a solid heat carrier at the other end. Body and solid product outlets 7. A vent 5 is provided in the blade of the screw advance mechanism 4. The edge of the blade of the screw advance mechanism 4 has an edge bent toward the advancement direction of the material. The solid heat medium input port 8 is provided with a solid heat carrier bucket 20, and the solid heat carrier bucket 20 is an eccentric structure of the anti-bridge bridge with an enlarged opening, which is adjacent to the solid fuel input port 8 and the solid load. The hot body input port 8 is axially uniform. The inlet of the solid heat carrier bucket 20 terminates in a furnace. The heating furnace comprises an oil/gas heating chamber with a spiral passage, the lower bottom of the spiral heating chamber 12 is connected to the residue storage tank 17 through the screen 15, and the solid heat medium inlet 14 of the spiral heating chamber 12 is connected to the solid state on the cracker casing 1. Heat carrier and solid product outlet 7. Between the spiral heating chamber 12 and the solid heat carrier bucket 20, there is an inclined heating passage 19 equipped with an oil/gas heater 9. The upper surface of the inclined heating passage 19 is provided along the longitudinal direction thereof with a set of return plates which are sequentially changed by a distance and downwardly extending. After the cracking is completed, the solid heat carrier is separated from the cracking residue by the closed circuit system, and the solid heat medium is transported to the high temperature flue gas heating chamber, and the high temperature smoke sent from the cracking residue and the non-condensable gas burning furnace. The gas is heated in reverse movement and achieves remote heating of the solid heat carrier, which fully guarantees the safety of the system operation. Other parts of this embodiment employ the prior art.

Equipment Example 19:

This embodiment is an improvement of the feed port and the solid product discharge port in any of the above-described apparatus embodiments 1 to 18. The conveying structure of the feeding port and the discharging port is a screw rod installed in the conveying pipe, and a cavity is left between the end of the auger and the end of the feeding pipe. The screw pitch in the conveying pipe connected to the feed port is gradually smaller, and the conveying pipe itself is a two-layer structure with a heat medium flow chamber, and the flowing heat carrier can be pre-processed while the raw material is fed into the cracker. The heat allows the raw material to become molten when it enters the cracker.

Claims

1. A continuous cracking process for waste plastics, characterized in that: it is continuously cracked by heating a raw material by a solid heat carrier fluid carrying heat and mixed in the cracker and moving in the same direction.

2. The continuous cracking process of waste plastic according to claim 1, characterized in that: the material is preheated to the crucible and then enters the cracking process, is in contact with the surface of the solid heat carrier moving in the same direction, is heated and is cracked.

3. The continuous cracking process of waste plastic according to claim 2, wherein: the generated HC1 is removed during the preheating process of the raw material.

4. The continuous cracking process of waste plastic according to claim 1 or 2 or 3, characterized in that: the raw material or the preheated molten raw material or the molten raw material which is subjected to the removal of HC1 after preheating and the solid heat carrier The bodies are continuously fed into the cracking process, and the cracking gas generated by the cracking is continuously discharged and the solid heat carrier and the solid product are continuously discharged together after the cracking; the solid heat carrier is separated from the solidification product by the cracking process after being output through the conveying system, and is sent Into the furnace, after heating, enter the cracking process.

5. The continuous cracking process of waste plastic according to claim 4, wherein: the raw material and the solid heat carrier are driven by a screw propulsion mechanism during the cracking process.

6. The continuous cracking process of waste plastic according to claim 1 or 2 or 3 or 4, characterized in that: the cracked gas after cracking is subjected to fractional distillation and cooling treatment after being catalyzed by a fixed bed, and the gas which cannot be condensed after cooling is sent to the heating. The furnace heats the solid heat carrier.

7. The continuous plastics cracking process of waste plastic according to claim 6, wherein: the residual solid product adhered to the solid heat carrier is removed while being heated. '

8. The continuous cracking process of waste plastic according to claim 6 or 7, characterized in that: the flue gas generated by heating preheats the raw material.

9. A continuous plastics cracking process for waste plastics according to claim 1 or 4 or 5 or 6 or 7 wherein: the solid heat carrier is a thermally conductive ball.

10. The continuous cracking process of waste plastic according to claim 9, characterized in that: 30-50 tons of heat conductive balls are used per ton of raw materials per hour.

11. The continuous cracking process of waste plastic according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10, characterized in that: preheating and spiral variable pitch extrusion are used at the inlet of the raw material. To achieve the seal, the material is sealed at the inlet of the solid heat carrier, and the spiral is propelled at the outlet of the solid heat carrier and the material at the port is sealed.

12. A waste plastic cracking apparatus, comprising a cracker casing, characterized in that: a spiral propulsion mechanism is arranged in the outer casing, a feed inlet and a solid heat medium input port are arranged at the front part of the outer casing, and a cracking gas outlet is arranged at the upper part, and the rear part is arranged There are solid heat carriers and solid product outlets.

13. The waste plastics cracking apparatus according to claim 12, wherein: said blade of said screw propulsion mechanism has a vent hole.

14. A waste plastics cracking apparatus according to claim 12 or claim 13 wherein the edge of the helical propulsion mechanism blade is bent toward the advancement direction of the material.

A waste plastics cracking apparatus according to claim 12 or 13 or 14, wherein: the solid heat carrier inlet is provided with an eccentric transport hopper having an enlarged opening.

The waste plastics cracking apparatus according to claim 12 or 13 or 14 or 15, wherein: the inlet of the solid heat carrier bucket is terminated with a heating furnace, and the furnace comprises a heating chamber with a spiral passage, the spiral The bottom of the heating chamber is connected to the residue storage tank through a screen, and the inlet of the upper end of the spiral heating chamber is connected to the solid heat medium and the solid product outlet on the cracker casing.

17. A waste plastics cracking apparatus according to claim 16 wherein: between the swirling heating chamber and the solid heat carrier transport bucket, there is an inclined heating passage containing an oil/gas heater.

18. The waste plastics cracking apparatus according to claim 17, wherein: the upper surface of the inclined heating passage is provided along the longitudinal direction thereof with a set of return plates which are sequentially separated by a distance and downwardly extending.

19. The waste plastics cracking apparatus according to claim 12 or 13 or 14 or 15 or 16 or 17 or 18, characterized in that: a feed pipe is connected to the feed port and the solid product discharge port, respectively, and conveyed The tube is provided with a cavity of a screw propulsion mechanism; the conveying pipe connected to the feeding port is a cavity with an inlet and an outlet, and the screw propulsion mechanism in the conveying pipe is a structure with a gradually smaller pitch.