A device and process for continuous pyrolysis of waste plastic and waste tire to produce oil

Abstract

This invention discloses a continuous pyrolysis refining apparatus and process for waste plastics and waste tires, applied in the field of waste plastics and waste tires pyrolysis refining technology. It includes a stirred depolymerization and dissolution kettle, a gasifier, a catalytic fractionation tower, a first cooler, a residue oil cracking kettle, a second cooler, piping components, and several sets of bases. An oil pump is installed between the catalytic fractionation tower and the first cooler. An oil pump and an oil tank are installed between the stirred depolymerization and dissolution kettle and the gasifier. The oil tank has a slag outlet and an oil outlet. The stirred depolymerization and dissolution kettle has an oil outlet, a feed inlet, and an oil inlet on its shaft. A stirrer is installed on the top of the stirred depolymerization and dissolution kettle. A residue oil pump is installed outside the stirred depolymerization and dissolution kettle. The piping components include an oil pipe, a return gas pipe, and an oil guide pipe. Valves one and two are installed on the shaft of the oil pipe, located on opposite sides of oil pump two. Oil pump one is installed outside the first cooler. This invention features the ability to achieve complete decomposition of waste plastics and waste tires.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis refining technology for waste plastics and waste tires, specifically to a continuous pyrolysis refining apparatus and process for waste plastics and waste tires. Background Technology

[0002] Waste plastics and waste tires usually refer to waste plastics and waste tires. As common solid wastes, they are numerous and difficult to degrade. If waste plastics and waste tires are disposed of by landfill or incineration, they can easily cause serious environmental damage. Therefore, waste plastics and waste tires are often recycled through pyrolysis refining processes, which not only protects the environment but also realizes the recycling of resources.

[0003] In existing pyrolysis refining technologies, most of them use rotary furnaces to complete the entire pyrolysis process in one go. However, this method relies on external heating and then transfers the heat to the material inside the reactor. This indirect heating means that the material can only absorb heat inside the reactor shell. The material that does not directly contact the shell has low heat energy acquisition efficiency. Therefore, the pyrolysis efficiency of this method is low.

[0004] Furthermore, existing technologies can utilize plasma to complete the pyrolysis of raw materials in one step, but this method consumes a lot of electricity and produces more gas than oil through pyrolysis. The non-condensable combustible gases generated by the pyrolysis of waste plastics and waste tires cannot be used directly, resulting in high production costs.

[0005] Therefore, how to achieve the recycling of waste plastics and waste tires has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a continuous pyrolysis and oil refining device for waste plastics and waste tires to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a continuous pyrolysis refining device for waste plastics and waste tires, comprising a stirred depolymerization and dissolution kettle, a gasifier, a catalytic fractionation tower, a first cooler, a residue oil cracking kettle, a second cooler, pipeline components and several sets of bases, characterized in that: an oil and gas pipe is provided between the gasifier and the catalytic fractionation tower, a connecting pipe is provided between the catalytic fractionation tower and the first cooler, an oil pump is provided between the catalytic fractionation tower and the first cooler, an oil pump is provided between the stirred depolymerization and dissolution kettle and the gasifier, and an oil tank is provided between the stirred depolymerization and dissolution kettle and the gasifier, wherein the oil tank is provided with a slag outlet and an oil outlet; The stirring depolymerization and dissolution vessel has an oil outlet, a feed inlet, and an oil inlet on its shaft. A stirrer is installed on the top of the stirring depolymerization and dissolution vessel, and the stirring structure of the stirrer is inserted into the interior of the stirring depolymerization and dissolution vessel. The external part of the stirred depolymerization and dissolution vessel is equipped with a sludge oil pump. The oil outlet is connected to the oil tank pipeline, the oil discharge port is connected to the oil pump three pipeline, and the oil pump three is connected to the gasifier pipeline. The pipeline assembly includes an oil pipe, a return gas pipe, and an oil guide pipe. The output end of the second oil pump is connected to the oil pipe. A valve first and a valve second are installed on the shaft of the oil pipe. The first valve and the second valve are located on both sides of the second oil pump. The first oil pump is installed outside the first cooler.

[0008] According to the above technical solution, the gasifier, catalytic fractionation tower, cooler one, and residue oil cracking kettle are all installed on the upper end of the base. The stirred depolymerization and dissolution kettle and the cooler two are both located outside the base. Multiple sets of output pipes are provided on the shaft of the catalytic fractionation tower. The oil pump two is fixedly installed on the upper end of the base and is connected to the output pipe located at the lowest end of the shaft of the catalytic fractionation tower. The oil pump three and the oil tank are both fixedly installed on the upper end of the base. The feed end of the residue oil pump is connected to the inside of the stirred depolymerization and dissolution kettle.

[0009] According to the above technical solution, a combustion chamber is installed on the shaft of the gasifier, a burner is installed inside the combustion chamber, and the slag outlet is connected to the oil guide pipe.

[0010] According to the above technical solution, the first oil pump is fixedly installed on the upper end of the base, and the first cooler is connected to the first oil pump via a pipeline.

[0011] According to the above technical solution, the residue cracking reactor is provided with a slag discharge port, and an evaporation gas pipe is provided between the residue cracking reactor and the cooler.

[0012] According to the above technical solution, an agitator shaft is installed inside the oil tank, and a motor is installed on the top of the oil tank. The output end of the motor passes through the oil tank and is fixedly connected to the agitator shaft. A filter plate one, a filter plate two, a filter plate three, and a scraper are installed on the shaft body of the agitator shaft. Sealing strips are installed on the edges of the filter plate one, the filter plate two, the filter plate three, and the scraper.

[0013] According to the above technical solution, filter plate one and filter plate two are perpendicular to each other, filter plate two and filter plate three are perpendicular to each other, filter plate one and scraper are perpendicular to each other, and filter plate three and scraper are perpendicular to each other.

[0014] According to the above technical solution, the filter plate one and the scraper form a filter space one, the filter plate one and the filter plate two form a filter space two, the filter plate two and the filter plate three form a filter space three, and the filter plate three and the scraper form a filter space four. Each set of sealing strips is in contact with the inside of the oil tank.

[0015] According to the above technical solution, the filter plate one is provided with a plurality of filter holes one, the filter plate two is provided with a plurality of filter holes two, and the filter plate three is provided with a filter hole three. The diameters of the filter holes one and the filter holes three are the same and smaller than the diameter of the filter holes two.

[0016] A process for a continuous pyrolysis and oil refining device for waste plastics and waste tires includes the following steps: Step 1: The high-temperature oil is heated using the gasifier, and then transported back into the stirring depolymerization and dissolution vessel using the pipeline assembly; Step 2: After the oil is heated to the required production temperature, the operator continuously adds waste plastic and waste tires into the stirring, depolymerization, and dissolving kettle through the feed inlet; Step 3: After the waste plastic and waste tires have been dissolved, the oil flows into the oil tank, where impurities are screened out. Step 4: The oil is pumped into the gasifier, catalytic fractionation tower and cooler 1 for deep catalytic cracking and distillation under heating.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention, by setting up a stirred depolymerization and dissolution kettle, a gasification furnace and a catalytic fractionation tower, firstly uses high-temperature liquid oil to depolymerize and dissolve waste plastics and waste tires, then uses an oil tank to screen out impurities, and then further heats and deeply catalytically cracks and distills, thereby realizing the decomposition and recycling of waste plastics and waste tires; by setting up a residue oil cracking kettle, the heavy components remaining from the oil cracking are cracked again into oil and ash residue, thereby realizing the complete decomposition of waste plastics and waste tires, effectively improving the recycling rate of waste plastics and waste tires, and realizing resource recycling. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the present invention. Figure 1 Schematic diagram of area A; Figure 3 This is a schematic diagram of the internal structure of the oil tank of the present invention; Figure 4 This is a schematic diagram of the filter plate structure of the present invention; Figure 5 This is a top view of the stirring shaft of the present invention; Figure 6 This is a schematic diagram of the working state of the present invention; Figure 7 This is a schematic diagram of scenario twob of the present invention; Figure 8 This is a schematic diagram of scenario twoc of the present invention; In the diagram: 1. Stirred depolymerization and dissolution vessel; 101. Oil outlet; 2. Gasification furnace; 3. Oil and gas pipe; 4. Catalytic fractionation tower; 5. Connecting pipe; 6. Cooler 1; 7. Residue oil cracking vessel; 8. Cooler 2; 9. Oil pump 2; 10. Oil pipe; 11. Oil pump 3; 12. Oil tank; 121. Slag outlet; 122. Oil outlet; 13. Feed inlet; 14. Stirrer; 15. Oil inlet; 16. Return gas pipe; 17. Evaporation gas pipe; 18. Slag outlet ; 19. Oil guide pipe; 20. Oil pump 1; 21. Valve 1; 22. Valve 2; 23. Combustion chamber; 24. Sludge pump; 25. Stirring shaft; 26. Motor; 27. Filter plate 1; 28. Filter plate 2; 29. ​​Filter plate 3; 30. Scraper; 31. Filter space 1; 32. Filter space 2; 33. Filter space 3; 34. Filter space 4; 35. Filter hole 1; 36. Filter hole 2; 37. Filter hole 3; 38. Base. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-2 The present invention provides a technical solution: a continuous pyrolysis refining device and process for waste plastic and waste tires, including a stirred depolymerization and dissolution kettle 1, a gasification furnace 2, a catalytic fractionation tower 4, a first cooler 6, a residue oil cracking kettle 7, a second cooler 8, pipeline components and several sets of bases 38. The gasification furnace 2, the catalytic fractionation tower 4, the first cooler 6 and the residue oil cracking kettle 7 are all installed on the upper end of the bases 38, and the stirred depolymerization and dissolution kettle 1 and the second cooler 8 are both located outside the bases 38.

[0021] An oil and gas pipe 3 is provided between the gasifier 2 and the catalytic fractionation tower 4. The oil and gas pipe 3 connects the gasifier 2 and the catalytic fractionation tower 4. A connecting pipe 5 is provided between the catalytic fractionation tower 4 and the cooler 6. The gasifier 2 is a tubular gasifier. The working principles of the gasifier 2, the catalytic fractionation tower 4, the cooler 6, the residue cracking kettle 7, and the cooler 8 are all existing technologies.

[0022] Multiple sets of output pipes are installed on the shaft of the catalytic fractionation column 4, and the connecting pipe 5 connects the catalytic fractionation column 4 to the cooler 6.

[0023] An oil pump 2 9 is installed between the catalytic distillation tower 4 and the cooler 6. The oil pump 2 9 is fixedly installed on the upper end of the base 38 and is connected to the output pipe located at the lowest end of the shaft of the catalytic distillation tower 4.

[0024] An oil pump 11 and an oil tank 12 are provided between the stirring depolymerization and dissolution vessel 1 and the gasifier 2. Both the oil pump 11 and the oil tank 12 are fixedly installed on the upper end of the base 38. The oil tank 12 has a slag outlet 121 and an oil outlet 122.

[0025] The stirring depolymerization dissolution vessel 1 has an oil outlet 101, a feed inlet 13 and an oil inlet 15 on its shaft. A stirrer 14 is installed on the top of the stirring depolymerization dissolution vessel 1. The stirring structure of the stirrer 14 is inserted into the interior of the stirring depolymerization dissolution vessel 1. The stirrer 14 is a prior art.

[0026] The stirred depolymerization and dissolution vessel 1 is equipped with a sludge oil pump 24 on its exterior, and the feed end of the sludge oil pump 24 is connected to the interior of the stirred depolymerization and dissolution vessel 1.

[0027] Oil outlet 101 is connected to oil tank 12 via pipeline, and a solenoid valve (not shown in the figure) is installed on the pipeline to control the opening and closing of the stirring depolymerization dissolution vessel 1 and oil tank 12. Oil outlet 122 is connected to oil pump 3 11 via pipeline, and a flow sensor and solenoid valve 2 (both not shown in the figure) are installed on the pipeline. Oil pump 3 11 is connected to gasifier 2 via pipeline. Combustion chamber 23 is installed on the shaft of gasifier 2, and a burner (not shown in the figure) is installed inside combustion chamber 23. The burner is used to heat the inside of gasifier 2.

[0028] The piping assembly includes an oil pipe 10, a return gas pipe 16, and an oil guide pipe 19. The oil pipe 10 connects the residue cracking reactor 7 to the stirred depolymerization and dissolution reactor 1. The output end of the second oil pump 9 is connected to the oil pipe 10. Valves 21 and 22 are installed on the shaft of the oil pipe 10. Valves 21 and 22 are located on both sides of the second oil pump 9. The return gas pipe 16 connects the catalytic fractionation tower 4 to the stirred depolymerization and dissolution reactor 1. The oil guide pipe 19 connects the residue cracking reactor 7 to the output end of the residue pump 24. The slag outlet 121 is connected to the oil guide pipe 19. A solenoid valve 3 (not shown in the figure) is installed on the pipe.

[0029] An oil pump 20 is installed on the outside of the cooler 6. The oil pump 20 is fixedly installed on the upper end of the base 38. The cooler 6 is connected to the oil pump 20 by pipeline. The output end of the oil pump 20 is connected to the production equipment in the subsequent process.

[0030] The residue cracking reactor 7 is provided with a slag discharge port 18, which is connected to the pipeline of the recovery device in the subsequent process. An evaporation pipe 17 is provided between the residue cracking reactor 7 and the cooler 8. The evaporation pipe 17 connects the residue cracking reactor 7 and the cooler 8. The output end of the cooler 8 is connected to the production equipment of the subsequent process.

[0031] Please refer to Figures 3-5 An agitator shaft 25 is installed inside the oil tank 12. A motor 26 is installed on the top of the oil tank 12. The output end of the motor 26 passes through the oil tank 12 and is fixedly connected to the agitator shaft 25. A filter plate 27, a filter plate 28, a filter plate 29 and a scraper 30 are installed on the shaft of the agitator shaft 25. Sealing strips (not shown in the figure) are installed on the edges of the filter plate 27, the filter plate 28, the filter plate 29 and the scraper 30.

[0032] Filter plate 1 (27) and filter plate 2 (28) are perpendicular to each other; filter plate 2 (28) and filter plate 3 (29) are perpendicular to each other; filter plate 1 (27) and scraper 30 are perpendicular to each other; and filter plate 3 (29) and scraper 30 are perpendicular to each other.

[0033] The filter space 31 is formed between filter plate 27 and scraper 30, the filter space 32 is formed between filter plate 27 and filter plate 28, the filter space 33 is formed between filter plate 28 and filter plate 29, and the filter space 34 is formed between filter plate 29 and scraper 30. Each set of sealing strips fits into the interior of oil tank 12 to achieve sealing between scraper 30, the edges of each set of filter plates and the inner wall of oil tank 12.

[0034] The filter plate 27 has several filter holes 35, the filter plate 28 has several filter holes 36, and the filter plate 29 has filter holes 37. The diameters of the filter holes 35 and 37 are the same and smaller than the diameter of the filter holes 36.

[0035] A continuous pyrolysis and oil refining device for waste plastics and waste tires includes the following usage method: High-temperature liquid oil is used to depolymerize and dissolve waste plastics and tires. Further heating and deep catalytic cracking and distillation are then carried out. After the waste plastics and tires come into contact with the hot oil, they are dispersed and coated. The high-temperature oil immediately transfers heat to the waste plastics and tires, accelerating the depolymerization and dissolution of the waste plastics and tires, and effectively improving production efficiency.

[0036] Step 1: The high-temperature oil is heated using the gasifier 2, and then transported back into the stirring depolymerization and dissolution vessel 1 using the pipeline assembly. This not only heats the oil but also tests the stirring depolymerization and dissolution vessel 1 and the gasifier 2, thus avoiding any impact on the formal production operation.

[0037] Specifically, the prepared oil is added into the stirred depolymerization and dissolution vessel 1 through the oil inlet 15. The motor 26 is started, and the motor 26 drives the stirring shaft 25 to rotate, thereby driving each set of filter plates to rotate, so that the filter space 31 is connected to the oil outlet 101 (e.g., Figure 6As shown), filter space 2 32 is connected to oil outlet 122, and filter space 33 is connected to slag outlet 121. At this time, the oil flows from the stirred depolymerization dissolution vessel 1 into filter space 1 31. Solenoid valve 1 is opened, and the oil flows further into filter space 1 31. The oil flows through filter hole 1 35 into filter space 2 32. Solenoid valve 2 is opened, and oil pump 3 11 is started. Oil pump 3 11 pumps the oil in filter space 2 32 into the interior of gasifier 2. The burner is started to heat the interior of gasifier 2. The oil and gas that have undergone high-temperature gasification distillation in gasifier 2 enter catalytic fractionation tower 4. Oil pump 2 9 is started and valve 2 22 is opened. The hot oil with a higher bottom temperature enters oil pipe 10 and is transported to stirred depolymerization dissolution vessel 1 through oil pipe 10. The high-temperature oil and gas return to stirred depolymerization dissolution vessel 1 through return gas pipe 16, thereby raising the temperature of the oil and simultaneously raising the temperature of the residual oil in stirred depolymerization dissolution vessel 1.

[0038] Step one can be repeated multiple times to ensure that the oil temperature reaches the required level for production.

[0039] Step 2: Once the oil is heated to the required production temperature, the solenoid valve is closed, and the operator continuously adds waste plastic and waste tires into the stirring, depolymerization, and dissolution vessel 1 through the feed inlet 13. The waste plastic and waste tires are depolymerized and dissolved under the action of the high-temperature oil.

[0040] Start the agitator 14. The agitator 14 stirs the oil and waste plastic and waste tires, promoting the dissolution of waste plastic and waste tires. The oil remaining in the gasifier 2 continues to return to the stirring depolymerization and dissolution vessel 1 through the oil pipe 10 and the return gas pipe 16, so that the oil inside the stirring depolymerization and dissolution vessel 1 is kept at a high temperature.

[0041] Step 3: After the waste plastic and waste tires have been dissolved, the oil flows into oil tank 12, where impurities are screened out.

[0042] After the waste plastic and waste tires have reached the standard time required for dissolution in the stirring depolymerization and dissolution kettle 1, the solenoid valve 1 is opened, and the oil containing the dissolved waste plastic and waste tires flows into the oil tank 12. The undissolved impurities in the waste plastic and waste tires are deposited at the bottom of the stirring depolymerization and dissolution kettle 1, and some impurities flow into the oil tank 12 with the oil. The oil tank 12 screens out the impurities, and the impurities enter the residue oil cracking kettle 7 through the oil guide pipe 19 and are recovered through the residue oil cracking kettle 7.

[0043] Specifically, during the process of oil entering the gasifier 2, the flow rate of the new oil inside the pipeline is checked by a flow sensor, and the degree of dissolution of waste plastic and waste tire inside the stirring depolymerization dissolution vessel 1 is judged by the change in the flow rate of the oil.

[0044] The flow sensor's detection results include the following: Scenario 1: The flow sensor detects that the flow rate of new oil inside the pipeline is greater than the minimum flow rate standard. This is an ideal state, indicating that the waste plastic and waste tires are fully dissolved in the stirring depolymerization and dissolution kettle 1. The specific flow rate standard is determined by production needs.

[0045] Scenario 2: The flow sensor detects that the flow rate of new oil in the pipeline is lower than the minimum flow rate standard, and records the time T taken for the oil flow rate to change from qualified to unqualified. This includes the following situations: Scenario 2a: Long-term accumulation of insoluble impurities in waste plastic and waste tires leads to a decrease in flow rate.

[0046] Scenario 2b: The hot oil in the stirring depolymerization dissolution vessel 1 cannot fully dissolve the waste plastic and waste tires, resulting in undissolved waste plastic and waste tire particles clogging the filter holes 35 of the filter plate 27.

[0047] Specifically, the phenomena in cases 2a and 2b are the same. Therefore, the motor 26 is started, causing each set of filter plates and scrapers 30 to rotate, thereby connecting filter space 2 32 with oil outlet 101 and filter space 33 with oil drain outlet 122 (e.g., Figure 7 As shown, the oil enters the second filtration space 32 through the oil outlet 101, flows through the second filter plate 28 into the third filtration space 33, and finally flows out through the oil outlet 122.

[0048] During this process, the new oil is filtered using filter hole 36. Since the pore size of filter hole 36 is larger than that of filter hole 35, in the initial stage, when impurities or waste plastic and waste tire particles have not caused blockage, the flow sensor detects the flow recovery standard value. When the detection time is greater than T, the reason for the flow reduction is determined by combining the flow rate of the new oil inside the pipeline.

[0049] If the flow sensor detects that the flow rate is still at the standard value after the detection time is greater than T, it means that the filter hole 36 is not blocked and the impurities pass directly through the filter hole 36. The reason for the reduced flow rate is determined to be case 2a. At this time, the raw materials of waste plastic and waste tire need to be pre-treated in the previous processing stage to screen out large-sized insoluble impurities in order to avoid affecting the pyrolysis refining efficiency of waste plastic and waste tire.

[0050] Furthermore, if the flow sensor detects a flow rate lower than the standard value but higher than the flow rate detected in the first test after the detection time is greater than T, it indicates that filter hole 2 36 is blocked, but the blockage is better than that of filter hole 1 35. Since the initial size of waste plastic and waste tires is random, under the same dissolution conditions, the smaller waste plastic and waste tires will be smaller after dissolution and thus pass through filter hole 2 36. The remaining waste plastic and waste tires will not be able to pass through filter hole 2 36 after dissolution. Therefore, the reason for the reduced flow rate is determined to be case 2b. At this time, the gasifier 2 should be used to increase the temperature of the oil to promote further dissolution of waste plastic and waste tires, change the type of oil, or divide the waste plastic and waste tires into smaller sizes in the previous processing stage to increase the degree of dissolution of waste plastic and waste tires.

[0051] Based on case 2a, there is case 2c: if the structural size of the impurity is larger than filter hole 2 36, it will cause filter hole 2 36 to become blocked. Specifically, the flow sensor detects the same flow rate as the first detection, and the impurity should be screened in the previous processing stage.

[0052] For scenarios 2a and 2c, since filter plate 27 intercepts insoluble impurities, the accumulation of insoluble impurities inevitably leads to blockage of filter pore 35. In this case, motor 26 is started, driving scraper 30 and each set of filter plates to rotate, connecting filter space 33 to oil outlet 101, and filter space 34 to oil drain 122 (e.g., ...). Figure 8 As shown), the oil flows through the filter plate 29, and the impurities inside the filter space 31 rotate with the filter space 31. When the filter space 31 is connected to the slag outlet 121, the solenoid valve 3 is opened, allowing the impurities to flow into the oil guide pipe 19.

[0053] It should be noted that when motor 26 is working, solenoid valve 2 is closed to prevent impurities from being carried into gasifier 2 by the oil.

[0054] Scenario 3: The flow sensor detects fluctuations in the flow rate of new oil inside the pipeline. The flow rate of new oil alternates between increasing and decreasing, but is always less than the standard flow rate.

[0055] Regarding the test results for scenario three, the flow rate of the new fuel alternately increases and decreases, but is always less than the standard flow rate. This indicates that filter hole 35 is in an alternating state of blockage and unblocking. When there is too much waste plastic and waste tires, the fuel cannot dissolve a large amount of waste plastic and waste tires at the same time, causing some undissolved waste plastic and waste tires to enter the filter space 31, resulting in blockage of filter hole 35. However, as the dissolution continues, the blockage of waste plastic and waste tires dissolves, unblocking filter hole 35, thus causing flow fluctuations. At this time, the fuel delivery volume should be increased to ensure that the fuel can meet the dissolution requirements of waste plastic and waste tires.

[0056] Furthermore, after the waste plastic and waste tires are dissolved, the sludge oil pump 24 is started to extract the oil containing deposited impurities from the inside of the stirring depolymerization and dissolution vessel 1, and transport it to the sludge oil cracking vessel 7 through the oil guide pipe 19 for recycling.

[0057] Step 4: The oil is pumped into the gasifier 2, catalytic fractionation tower 4 and cooler 6 for heated deep catalytic cracking and distillation.

[0058] Oil pump 311 pumps the filtered oil into gasifier 2. The new oil and gas after high-temperature gasification and distillation enters catalytic fractionation tower 4. Catalytic fractionation tower 4 performs fractionation on the new oil and gas. The oil and gas fractionated from catalytic fractionation tower 4 enters cooler 6 to cool and obtain high-quality oil, which is finally pumped to subsequent processes by oil pump 20.

[0059] Furthermore, open valve 1 (21), close valve 2 (22), and start oil pump 2 (9). Oil pump 2 (9) pumps the heavy oil and impurities remaining from the fractionation of the catalytic fractionation tower 4 into the residue cracking reactor 7 for recovery. The recovery principle is the same as that in step 3, achieving complete decomposition of waste plastics and waste tires.

[0060] The gasifier 2, return gas pipe 16, and oil pipe 10 are used to circulate and heat the oil, so that the high-temperature liquid oil depolymerizes and dissolves the waste plastic and waste tires. The waste plastic and waste tires are in direct contact with the high-temperature oil and are quickly and thoroughly dispersed and coated, immediately transferring heat to the waste plastic and waste tires, accelerating the depolymerization and dissolution of the materials, and effectively improving production efficiency. Further heating and deep catalytic cracking and distillation are carried out, and the heavy oil and impurities are completely decomposed in the residue oil cracking kettle 7, realizing the complete decomposition of waste plastic and waste tires, effectively improving the recycling rate of waste plastic and waste tires, and reducing environmental pollution.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0062] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous pyrolysis refining device for waste plastics and waste tires, comprising a stirred depolymerization and dissolution kettle (1), a gasifier (2), a catalytic fractionation tower (4), a first cooler (6), a residue oil cracking kettle (7), a second cooler (8), pipeline components, and several sets of bases (38), characterized in that: An oil and gas pipe (3) is provided between the gasifier (2) and the catalytic fractionation tower (4), a connecting pipe (5) is provided between the catalytic fractionation tower (4) and the first cooler (6), an oil pump (9) is provided between the catalytic fractionation tower (4) and the first cooler (6), an oil pump (11) and an oil tank (12) are provided between the stirred depolymerization and dissolution vessel (1) and the gasifier (2), and the oil tank (12) is provided with a slag outlet (121) and an oil outlet (122). The stirring depolymerization dissolution vessel (1) has an oil outlet (101), a feed inlet (13) and an oil inlet (15) on its shaft. A stirrer (14) is installed on the top of the stirring depolymerization dissolution vessel (1), and the stirring structure of the stirrer (14) is inserted into the interior of the stirring depolymerization dissolution vessel (1). The external of the stirring depolymerization and dissolution vessel (1) is equipped with a sludge oil pump (24), the oil outlet (101) is connected to the oil tank (12) by pipeline, the oil discharge port (122) is connected to the oil pump three (11) by pipeline, and the oil pump three (11) is connected to the gasifier (2) by pipeline. The pipeline assembly includes an oil pipe (10), a return air pipe (16), and an oil guide pipe (19). The output end of the second oil pump (9) is connected to the oil pipe (10). A valve (21) and a valve (22) are installed on the shaft of the oil pipe (10). The first valve (21) and the second valve (22) are located on both sides of the second oil pump (9). An oil pump (20) is installed outside the first cooler (6).

2. The continuous pyrolysis and oil refining device for waste plastics and waste tires according to claim 1, characterized in that: The gasifier (2), catalytic fractionation tower (4), cooler one (6), and residue oil cracking vessel (7) are all installed on the upper end of the base (38). The stirred depolymerization dissolution vessel (1) and the cooler two (8) are both located outside the base (38). The shaft of the catalytic fractionation tower (4) is provided with multiple sets of output pipes. The oil pump two (9) is fixedly installed on the upper end of the base (38). The oil pump two (9) is connected to the output pipe located at the lowest end of the shaft of the catalytic fractionation tower (4). The oil pump three (11) and the oil tank (12) are both fixedly installed on the upper end of the base (38). The feed end of the residue oil pump (24) is connected to the inside of the stirred depolymerization dissolution vessel (1).

3. The continuous pyrolysis and oil refining device for waste plastics and waste tires according to claim 2, characterized in that: The gasifier (2) has a combustion chamber (23) installed on its shaft. The combustion chamber (23) is equipped with a burner. The slag outlet (121) is connected to the oil guide pipe (19).

4. The continuous pyrolysis and oil refining device for waste plastics and waste tires according to claim 3, characterized in that: The oil pump (20) is fixedly installed on the upper end of the base (38), and the cooler (6) is connected to the oil pump (20) via pipeline.

5. The continuous pyrolysis and oil refining device for waste plastics and waste tires according to claim 4, characterized in that: The residue cracking reactor (7) is provided with a slag discharge port (18), and an evaporation pipe (17) is provided between the residue cracking reactor (7) and the cooler (8).

6. The continuous pyrolysis and oil refining apparatus for waste plastics and waste tires according to claim 5, characterized in that: The oil tank (12) is equipped with a stirring shaft (25), and a motor (26) is installed on the top of the oil tank (12). The output end of the motor (26) passes through the oil tank (12) and is fixedly connected to the stirring shaft (25). The stirring shaft (25) is equipped with a filter plate (27), a filter plate (28), a filter plate (29) and a scraper (30). Sealing strips are installed on the edges of the filter plate (27), filter plate (28), filter plate (29) and scraper (30).

7. The continuous pyrolysis and oil refining apparatus for waste plastics and waste tires according to claim 6, characterized in that: The filter plate one (27) and the filter plate two (28) are perpendicular to each other, the filter plate two (28) and the filter plate three (29) are perpendicular to each other, the filter plate one (27) and the scraper (30) are perpendicular to each other, and the filter plate three (29) and the scraper (30) are perpendicular to each other.

8. The continuous pyrolysis and oil refining device for waste plastics and waste tires according to claim 7, characterized in that: The filter plate (27) and the scraper (30) form a filter space (31), the filter plate (27) and the filter plate (28) form a filter space (32), the filter plate (28) and the filter plate (39) form a filter space (33), and the filter plate (39) and the scraper (30) form a filter space (34). Each set of sealing strips fits into the interior of the oil tank (12).

9. A continuous pyrolysis and oil refining device for waste plastics and waste tires according to claim 8, characterized in that: The filter plate 1 (27) has a plurality of filter holes 1 (35), the filter plate 2 (28) has a plurality of filter holes 2 (36), and the filter plate 3 (29) has a filter hole 3 (37). The diameters of the filter holes 1 (35) and the filter holes 3 (37) are the same and smaller than the diameter of the filter holes 2 (36).

10. A process for a continuous pyrolysis refining apparatus for waste plastics and waste tires, using the continuous pyrolysis refining apparatus for waste plastics and waste tires as described in claim 9, characterized in that: Includes the following steps: Step 1: Heat the high-temperature oil using the gasifier (2), and then transport the high-temperature oil back into the stirring depolymerization and dissolution vessel (1) using the pipeline assembly; Step 2: After the oil is heated to the required production temperature, the operator continuously adds waste plastic and waste tires into the stirring depolymerization and dissolution vessel (1) through the feed inlet (13); Step 3: After the waste plastic and waste tires are dissolved, the oil flows into the oil tank (12), and the oil tank (12) screens out impurities; Step 4: The oil is pumped into the gasifier (2), catalytic fractionation tower (4) and cooler (6) for deep catalytic cracking and distillation under heating.

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