Evaluation method for evaluating waste rubber and waste plastic pyrolysis equipment system and its lifespan

Abstract

The present invention provides an evaluation method for evaluating a waste rubber and waste plastic cracking equipment system and its lifespan, and relates to the field of solid waste recycling. The present invention includes the following steps: according to the different materials of the kettle body and the internal structure of the cracking equipment, spherical media of different sizes and corresponding materials are prepared and circular holes of different sizes are opened; a relevant judgment standard for evaluating the corrosion degree of the cracking reactor through the change in the size of the circular holes of the spherical medium is established, and the corrosion status of the cracking reactor is reflected in real time through the two parameters of the change in the diameter of the circular hole and the corrosion depth. The present invention can accurately predict the service life of the waste rubber and waste plastic cracking reactor and ensure that the cracking reaction is carried out safely and effectively.

Description

Technical Field

[0001] The invention relates to waste rubber and waste plastic cracking equipment, in particular to a method for evaluating a waste rubber and waste plastic cracking equipment system and its life span, and belongs to the technical field of solid waste recycling. Background Art

[0002] The rubber and plastic products industry is one of the important traditional basic industries of the national economy. Its wide use in military, aerospace, and civilian applications has irreplaceable strategic significance. However, with the rapid development of the rubber and plastic industry, problems have also emerged. A large amount of waste rubber and waste plastic cannot be naturally degraded, forming serious "black pollution" and "white pollution". How to effectively solve the harm caused by the mountains of black and white garbage to the environment and alleviate and improve the environmental pollution pressure of the global village has become a common problem facing the world and urgently needs to be broken through.

[0003] my country is a major rubber industry country, with an annual domestic output value of over one trillion yuan, of which tires account for about 70%. China's tire production accounts for about 40% of the world's total, and has been ranked first in the world for many consecutive years. At the same time, a large number of waste tires are also produced. According to statistics, my country's waste tire production exceeded 14 million tons (more than 350 million tires) in 2019, and increased at an annual rate of 8% to 10%. It is estimated that by 2025, the amount of waste tires will exceed 20 million tons, which has caused serious waste of energy resources and environmental pollution. This is even more true for plastic products. According to statistics, my country's plastic product output reached 81.842 million tons in 2021, making it the world's largest "plastic kingdom"; at the same time, a large amount of waste plastics is also produced, with an annual output of nearly 50 million tons of waste plastics, and it has increased sharply at an alarming rate, causing serious "white pollution". The environmental problems caused by waste rubber and waste plastics have become the focus of global attention. It has long attracted the country's high attention. The "National Medium- and Long-Term Science and Technology Development Plan" has listed comprehensive pollution control and waste recycling as priority themes in key areas, and included the resource utilization of waste tires in the national strategic emerging industry development plan. It is a "key project for the recycling of important resources" and is written into the "Circular Economy Promotion Law."

[0004] Cracking has become one of the most effective methods for treating waste rubber and waste plastics. However, since waste rubber contains a large amount of sulfur and waste plastics also contain a large amount of chlorine, these two harmful elements are very likely to produce hydrochloric acid and sulfuric acid during the cracking process, which seriously corrodes the equipment and greatly reduces the service life of the cracking reactor. In addition, there is currently no method in the industry to conduct real-time detection of the corrosion of cracking reaction equipment. The cracking reactor will only be shut down for maintenance after it is corroded and leaks. However, since the cracking of waste rubber and waste plastics produces flammable and explosive gases, it is very easy to explode after corrosion and leakage, resulting in serious safety accidents. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] The purpose of the present invention is to provide an evaluation method for evaluating a waste rubber and waste plastic pyrolysis equipment system and its life in order to solve the above-mentioned problems. By adding a special spherical medium into the waste rubber and waste plastic pyrolysis reactor and evaluating the corrosion of the spherical medium, the service life of the pyrolysis reactor can be judged, thereby being able to monitor the corrosion of the pyrolysis reactor in real time and eliminate safety hazards caused by corrosion and leakage of the pyrolysis reactor.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented by the following technical scheme: A method for evaluating the life of waste rubber and waste plastic cracking equipment comprises the following steps:

[0009] Step 1: According to the different materials of the kettle body and internal structure of the cracking equipment, spherical media of different sizes and corresponding materials are prepared and circular holes of different sizes are opened. The spherical media moves in the cracking reaction equipment together with the cracking raw materials. The circular hole size and corrosion depth on the spherical media are regularly detected. The service life of the waste rubber and waste plastic cracking equipment is evaluated by the change of circular hole size and corrosion depth;

[0010] The size of the spherical medium is mainly determined by the thickness of the kettle body and internal structural materials of the cracking equipment. The thicker the thickness, the smaller the ball radius of the spherical medium and the larger the size of the circular hole opened on it; conversely, the thinner the thickness, the larger the ball radius of the spherical medium and the smaller the size of the circular hole opened on it; the rules to be followed are:

[0011]

[0012] k1=(0.05~0.1)θ,θ≥1.5m, k1 takes the lower limit, θ≤1m, k1 takes the upper limit,

[0013] r 孔 =k2R 球 +0.5(h 厚 +R 球 ), where k2 is mainly related to the carbon content of the circulating medium material,

[0014] k2=1.1~1.2, the carbon content of the circulating medium material is ≤0.42~0.50%;

[0015] k2=1.4~1.5, carbon content of circulating medium material>0.42~0.50%

[0016] Step 2: Establish relevant judgment criteria for evaluating the degree of corrosion of the cracking reactor through the change in the size of the circular hole of the spherical medium. The corrosion status of the cracking reactor is reflected in real time through the two parameters of the circular hole diameter change and the corrosion depth. Establish a database for evaluating the degree of corrosion of the cracking reactor based on test data related to the circular hole diameter change and the corrosion depth. Real-time detection of the circular hole diameter change and the corrosion depth will be given, and an alarm will be given when a significant difference is found.

[0017] Preferably, the circular holes on the spherical medium are cross holes opened on the spherical circulating medium; the cross holes have different sizes, and the hole size of each circulating medium is based on the small hole size, and the large hole size of the circulating medium is r 大孔 =1.8r 孔

[0018] See attached Figure 6 , 111 is a small hole on the circulating medium (reference hole r 孔 ), 222 is the macropore on the circulating medium (r 大孔 =1.8r 孔 ).

[0019] Preferably, the number of media of each structural material of the spherical media is between 10 and 15, the ball radius is between 5 and 30 mm, and the hole size, ball radius and number of media follow the following rules:

[0020] m=K3r 孔 +(K1-K2)R 球 , where K3 is related to the reactor speed n,

[0021] When n>1.8r / min, K3=1.25~1.35;

[0022] When n≤1.8r / min, K3=1.05~1.15;

[0023] The spherical circulating medium moves with the cracking raw material in the cracking reaction equipment. The cracking raw material is completely cracked under high temperature conditions. The circulating small balls and the solid phase cracking products are separated by the circulating medium and cracking solid phase product separation system.

[0024] The circulating ball is used in the circulating medium corrosion condition detection device and system to align the circulating ball, capture the hole size, and evaluate the corrosion condition;

[0025] The service life of waste rubber and waste plastic cracking equipment is evaluated by the change in circular hole size and corrosion depth. The visual technology is used to capture the circular hole size and corrosion depth on the spherical medium during the transportation process. The expanded diameter range and corrosion depth of the circular hole on the medium are measured by computer technology and compared with the original data.

[0026] Preferably, the relevant judgment criteria for evaluating the corrosion degree of the cracking reactor by the spherical medium are mainly to comprehensively judge the corrosion condition of the reactor by controlling the percentage of the enlarged size of the circular hole and the percentage of the corrosion depth;

[0027] The multi-parameter comprehensive judgment of the percentage of circular hole expansion and the percentage of corrosion depth mainly refers to three methods: evaluating the service life of cracking equipment by the percentage of circular hole expansion, evaluating the service life of cracking equipment by the percentage of corrosion depth, and evaluating the service life of cracking equipment by combining the two parameters of the percentage of circular hole expansion and the percentage of corrosion depth. The respective evaluation criteria are as follows:

[0028] (1) Evaluate the service life of cracking equipment by the percentage of circular hole size expansion;

[0029] The macropore size of the circulating medium is r 大孔 =1.8r 孔 , first determine Δr(r 孔 ) and 0.75Δr(r 大孔 ) Whichever value is larger, in the subsequent calculation, the Δr of which hole of the circulating medium is used as the basis;

[0030] If Δr(r 孔 )<0.75Δr(r 大孔 ),but

[0031] Stop for maintenance and replace key components;

[0032] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 2 months;

[0033] Normal equipment maintenance

[0034] Similarly:

[0035] If Δh(h 孔 )≥0.95Δh(h 大孔 ),but h 孔 Total length of the small hole

[0036] Stop for maintenance and replace key components;

[0037] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 2 months;

[0038] Normal equipment maintenance

[0039] If Δh(h 孔 )<0.95Δh(h大孔 ),but h 大孔 Total length of large hole

[0040] Stop for maintenance and replace key components;

[0041] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 2 months;

[0042] Normal equipment maintenance

[0043] (2) Evaluate the service life of cracking equipment by corrosion depth percentage;

[0044] First determine the corrosion depth Δh of the small and large holes of the circulating medium (mainly determine Δh(h 孔 ) and 0.95Δh(h 大孔 ) Whichever value is larger, in the subsequent calculation, the corrosion depth Δh of which hole of the circulating medium is taken as the benchmark;

[0045] If Δh(h 孔 )≥0.95Δh(h 大孔 ),but h 孔 Total length of the small hole

[0046] Stop for maintenance and replace key components;

[0047] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 2 months;

[0048] If the equipment is normally maintained, Δh(h 孔 )≤0.95Δh(h 大孔 ),but h 大孔 Total length of large hole

[0049] Stop for maintenance and replace key components;

[0050] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 2 months;

[0051] Normal equipment maintenance

[0052] (3) Evaluation of the service life of cracking equipment by two parameters: the percentage of circular hole enlargement and the percentage of corrosion depth

[0053] With Δr(r 大孔 ) and Δh(h 孔) is the basis for judgment,

[0054] Stop for maintenance and replace key components;

[0055] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 1 month;

[0056] The equipment is maintained normally.

[0057] Preferably, among the three methods for evaluating the service life of cracking equipment, if only one reaches the relevant value during the actual evaluation process, a corresponding alarm indication is given.

[0058] Preferably, the corrosion status of the cracking reactor is reflected in real time by the two parameters of the circular hole diameter change and the corrosion depth. The circular hole size and the corrosion depth on the spherical medium are captured by visual technology, and the expanded diameter range and the corrosion depth of the circular hole on the medium are measured by computer technology, and compared with the original data.

[0059] The system for evaluating the service life of waste rubber and waste plastic cracking equipment includes motor transmission parts, elastic couplings, sealing end covers, observation windows, cover plates, racks, transmission shafts, bearings, flat keys, built-in mechanisms for circulating ball separation, circulating ball separation shell structures, detection ring fittings, detection racks, circulating ball alignment cylinders, visual detectors, bottom visual detectors, bottom visual detection fixing plates, and retaining rings. The system realizes continuous separation and online detection of circulating media under the action of the whole, evaluates the service life of the cracking reactor according to the corrosion condition of the circulating medium, and can grasp the corrosion condition of the cracking reactor in real time.

[0060] Preferably, the main structure of the built-in mechanism for separating the circulating small balls is to divide it into the first area, the second area, and the third area by the prism plates, and the size of each area is set in turn according to the size of the circulating small balls, and the circumference of the first area, the second area, and the third area is mirrored to 360 degrees to form the main structure of the built-in mechanism for separating the circulating small balls;

[0061] The circulating ball separation shell structure has a 1# circulating ball channel, a 2# circulating ball channel, and a 3# circulating ball channel at the bottom. The size of each channel is set according to the size of the circulating ball, which is 105% to 115% of the diameter of the circulating ball. The distance between the channel and the bottom increases by 30% to 50% of the diameter of the previous circulating ball.

[0062] The circulating ball separation shell structure, in order to achieve the smooth flow of the circulating balls from the center to the bottom of each area, its bottom surface is designed as a special-shaped curved surface structure. The specific surface equation is as follows:

[0063]

[0064] Among them, R 2 The bottom radius of the built-in mechanism for separating the circulating balls.

[0065] a, b, and c are mainly related to the size of the circulating spheres.

[0066] Preferably, the method of using is: align the circulating balls to the appropriate positions in turn, mainly by using the circulating ball alignment cylinder to drive the swing rod to extend into the appropriate position in the detection ring pipe fitting, generally 5 to 10 mm away from the outer diameter of the pipe. When the circulating balls hit the swing rod in turn, due to the cross holes on the circulating balls, the swing rod will hang on one of the holes in the circulating balls, so that one of the circulating balls is facing downwards and the other is on the swing rod. At this time, the visual detector and the bottom visual detector capture the relevant data of the circulating balls, and perform calculations and evaluations.

[0067] Preferably, the circulating medium lifting component is connected to the circulating medium and cracking solid phase product separation system through a flange, and the circulating medium lifting component is connected to the cover plate through a flange; the cover plate is connected to the circulating ball separation shell structure through bolts; the sealing end cover is connected to the cover plate through bolts; the motor transmission component is connected to the transmission shaft through an elastic coupling, a bearing is installed on the transmission shaft, and the transmission shaft is connected to the circulating ball separation built-in mechanism through a flat key; the detection ring pipe fitting is respectively connected to the circulating ball diverter plate and the conveying pipeline through a flange, the circulating ball diverter plate and the circulating ball separation shell structure are welded together, the detection frame is welded to the detection ring pipe fitting, and the detection frame is equipped with a circulating ball straightening cylinder, a swing rod and a visual detector;

[0068] The clamping ring is fixed on the conveying pipeline, and the clamping ring is connected to the bottom visual detection fixing plate by bolts, and the bottom visual detector is installed on the bottom visual detection fixing plate;

[0069] Four detection channels are opened in the detection ring pipe at 90 degrees, followed by four groups of circulating ball alignment cylinders and visual detectors.

[0070] The present invention provides an evaluation method for evaluating a waste rubber and waste plastic cracking equipment system and its lifespan, which has the following beneficial effects:

[0071] The invention can accurately predict the service life of a waste rubber and waste plastic cracking reactor, and ensure that the cracking reaction is carried out safely and effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 This is a schematic diagram of the main structure of organic solid waste cracking of the present invention;

[0073] Figure 2 This is a schematic diagram of the circulating medium corrosion detection system of the present invention;

[0074] Figure 3 This is a schematic diagram of the structure of the circulating medium separation component of the present invention;

[0075] Figure 4 A diagram showing the division of the working area of ​​the circulating medium separation component of the present invention;

[0076] Figure 5 This is a structural diagram of the circulating medium position adjustment of the present invention;

[0077] Figure 6 is a schematic diagram of the spherical medium of the present invention;

[0078] Figure 7 is a schematic diagram of a circular hole on a spherical medium of the present invention;

[0079] Figure 8 It is a reference and comparison schematic diagram of circular hole corrosion on the spherical medium of the present invention.

[0080] In the figure: 1. Circulating medium lifting component; 2. Motor transmission component; 3. Elastic coupling; 4. Sealing end cover; 5. Observation window; 6. Cover plate; 7. Frame; A. End connection end of cracking reactor; B. Bottom connection end of cracking reactor; 8. Transmission shaft; 9. Bearing; 10. Flat key; 11. Circulating ball separation built-in mechanism; 12. Circulating ball separation shell structure; 13. Detection ring pipe; 14. Detection frame; 15. Circulating ball alignment cylinder; 16. Visual detector; 17. Bottom visual Detector; 18. Bottom visual inspection fixing plate; 19. Retaining ring; 20. Swing rod; 21. Circulating ball diverter plate; I. Continuous feeding system; II. Cracking reactor main system; III. Circulating medium corrosion detection device and system; IV. Circulating medium and cracking solid phase product separation system; V. Cracking solid phase product transportation system; VI. Cracking oil grade automatic collection system; VII. Cracking non-condensable combustible gas recycling system; VIII. Modular distributed intelligent exhaust gas comprehensive treatment system; IX. Combustion heating system. DETAILED DESCRIPTION

[0081] The embodiment of the present invention provides a method for evaluating the life of waste rubber and waste plastic pyrolysis equipment.

[0082] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , including the following steps:

[0083] Step 1: According to the different materials of the kettle body and internal structure of the cracking equipment, spherical media of different sizes and corresponding materials are prepared and circular holes of different sizes are opened. The spherical media moves in the cracking reaction equipment together with the cracking raw materials. The circular hole size and corrosion depth on the spherical media are regularly detected. The service life of the waste rubber and waste plastic cracking equipment is evaluated by the change of circular hole size and corrosion depth;

[0084] The size of the spherical medium is mainly determined by the thickness of the kettle body and internal structural materials of the cracking equipment. The thicker the thickness, the smaller the ball radius of the spherical medium and the larger the size of the circular hole opened on it; conversely, the thinner the thickness, the larger the ball radius of the spherical medium and the smaller the size of the circular hole opened on it; the rule it follows is (where h 厚 R is the thickness of the cracking equipment kettle; 球 is the radius of the spherical medium):

[0085] Where k1 is related to the reactor diameter θ,

[0086] k1=(0.05~0.1)θ,θ≥1.5m, k1 takes the lower limit, θ≤1m, k1 takes the upper limit,

[0087] r 孔 =k2R 球 +0.5(h 厚 +R 球 ), where k2 is mainly related to the carbon content of the circulating medium material,

[0088] k2=1.1~1.2, the carbon content of the circulating medium material is ≤0.42~0.50%;

[0089] k2=1.4~1.5, carbon content of circulating medium material>0.42~0.50%

[0090] Step 2: Establish relevant judgment criteria for evaluating the degree of corrosion of the cracking reactor through the change in the size of the circular hole of the spherical medium. The corrosion status of the cracking reactor is reflected in real time through the two parameters of the circular hole diameter change and the corrosion depth. Establish a database for evaluating the degree of corrosion of the cracking reactor based on test data related to the circular hole diameter change and the corrosion depth. Real-time detection of the circular hole diameter change and the corrosion depth will be given, and an alarm will be given when a significant difference is found.

[0091] The circular holes on the spherical medium are cross holes opened on the spherical circulating medium; the cross holes have different sizes, and the hole size of each circulating medium is based on the small hole size, and the large hole size of the circulating medium is r 大孔 =1.8r 孔

[0092] Refer to the attached Figure 6 , 111 is a small hole on the circulating medium (reference hole r 孔), 222 is the macropore on the circulating medium (r 大孔 =1.8r 孔 ).

[0093] The number of media of each structural material of the spherical medium is between 10 and 15, the ball radius is between 5 and 30 mm, and the hole size, ball radius and number of media follow the following rules:

[0094] m=K3r 孔 +(K1-K2)R 球 , where K3 is related to the reactor speed n,

[0095] When n>1.8r / min, K3=1.25~1.35;

[0096] When n≤1.8r / min, K3=1.05~1.15;

[0097] The spherical circulating medium moves with the cracking raw material in the cracking reaction equipment. The cracking raw material is completely cracked under high temperature conditions. The circulating small ball and the solid phase cracking product are separated by the IV circulating medium and cracking solid phase product separation system.

[0098] The circulating ball is used in the III circulating medium corrosion condition detection device and system to carry out the process of circulating ball alignment, hole size capture, and corrosion condition evaluation;

[0099] The service life of waste rubber and waste plastic cracking equipment is evaluated by the change in circular hole size and corrosion depth. The visual technology is used to capture the circular hole size and corrosion depth on the spherical medium during the transportation process. The expanded diameter range and corrosion depth of the circular hole on the medium are measured by computer technology and compared with the original data.

[0100] The relevant judgment criteria for evaluating the corrosion degree of cracking reactors using spherical media are mainly to comprehensively judge the corrosion of reactors by controlling the percentage of circular hole enlargement and the percentage of corrosion depth to make a multi-parameter comprehensive judgment;

[0101] The multi-parameter comprehensive judgment of the percentage of circular hole expansion and the percentage of corrosion depth mainly refers to three methods: evaluating the service life of cracking equipment by the percentage of circular hole expansion, evaluating the service life of cracking equipment by the percentage of corrosion depth, and evaluating the service life of cracking equipment by combining the two parameters of the percentage of circular hole expansion and the percentage of corrosion depth. The respective evaluation criteria are as follows:

[0102] (1) Evaluate the service life of cracking equipment by the percentage of circular hole enlargement (the circular holes on the spherical medium are cross holes opened on the spherical circulating medium; the cross holes have different sizes, and the hole size of each circulating medium is based on the small hole size, and the large hole size of the circulating medium is r 大孔 =1.8r孔 ; Δr is the enlarged size of the circular hole on the spherical circulating medium; Δr(r 孔 ) is the enlarged size of the small holes on the spherical circulation medium; Δr(r 大孔 ) is the enlarged size of the large pores on the spherical circulating medium; Δh is the corrosion depth of the circular pores in the spherical circulating medium; Δh(h 孔 ) is the pore corrosion depth of the spherical circulating medium; Δh(h 大孔 ) is the macropore corrosion depth of spherical circulating medium);

[0103] The macropore size of the circulating medium is r 大孔 =1.8r 孔 , first determine Δr(r 孔 ) and 0.75Δr(r 大孔 ) Whichever value is larger, in the subsequent calculation, the Δr of which hole of the circulating medium is used as the basis;

[0104] If Δr(r 孔 )<0.75Δr(r 大孔 ),but

[0105] Stop for maintenance and replace key components;

[0106] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 2 months;

[0107] Normal equipment maintenance

[0108] Similarly:

[0109] If Δh(h 孔 )≥0.95Δh(h 大孔 ),but h 孔 Total length of the small hole

[0110] Stop for maintenance and replace key components;

[0111] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 2 months;

[0112] Normal equipment maintenance

[0113] If Δh(h 孔 )<0.95Δh(h 大孔 ),but h 大孔 Total length of large hole

[0114] Stop for maintenance and replace key components;

[0115] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 2 months;

[0116] Normal equipment maintenance

[0117] (2) Evaluate the service life of cracking equipment by corrosion depth percentage;

[0118] First determine the corrosion depth Δh of the small and large holes of the circulating medium (mainly determine Δh(h 孔 ) and 0.95Δh(h 大孔 ) Whichever value is larger, in the subsequent calculation, the corrosion depth Δh of which hole of the circulating medium is taken as the benchmark;

[0119] If Δh(h 孔 )≥0.95Δh(h 大孔 ),but h 孔 Total length of the small hole

[0120] Stop for maintenance and replace key components;

[0121] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 2 months;

[0122] If the equipment is normally maintained, Δh(h 孔 )≤0.95Δh(h 大孔 ),but Total length of large hole

[0123] Stop for maintenance and replace key components;

[0124] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 2 months;

[0125] Normal equipment maintenance

[0126] (3) Evaluation of the service life of cracking equipment by two parameters: the percentage of circular hole enlargement and the percentage of corrosion depth

[0127] With Δr(r 大孔 ) and Δh(h 孔 ) is the basis for judgment,

[0128] Stop for maintenance and replace key components;

[0129] Alarm, equipment is ready for maintenance, the maximum usage period shall not exceed 1 month;

[0130] The equipment is maintained normally.

[0131] There are three methods for evaluating the service life of cracking equipment. In the actual evaluation process, if only one of them reaches the relevant value, a corresponding alarm indication will be given.

[0132] The corrosion status of the cracking reactor is reflected in real time through the two parameters of the circular hole diameter change and the corrosion depth. The circular hole size and corrosion depth on the spherical medium are captured by visual technology, and the expanded diameter range and corrosion depth of the circular hole on the medium are measured by computer technology, and compared with the original data.

[0133] Please refer again Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The system for evaluating the service life of waste rubber and waste plastic cracking equipment includes 2 motor transmission parts, 3 elastic couplings, 4 sealing end covers, 5 observation windows, 6 cover plates, 7 frames, 8 transmission shafts, 9 bearings, 10 flat keys, 11 circulating ball separation built-in mechanisms, 12 circulating ball separation shell structures, 13 detection ring pipes, 14 detection frames, 15 circulating ball straightening cylinders, 16 visual detectors, 17 bottom visual detectors, 18 bottom visual detection fixing plates, and 19 retaining rings. The system realizes continuous separation and online detection of circulating media under the action of the whole, evaluates the service life of the cracking reactor according to the corrosion conditions of the circulating media, and can grasp the corrosion conditions of the cracking reactor in real time.

[0134] 11 circulation ball separation built-in mechanism, its main structure is divided into the first area, the second area, and the third area by the prism plate, the size of each area is set in turn according to the size of the circulation ball, and the circumference of the first area, the second area, and the third area is mirrored to 360 degrees to form the main structure of the 11 circulation ball separation built-in mechanism;

[0135] 12 circulation ball separation shell structure, with 1# circulation ball channel, 2# circulation ball channel and 3# circulation ball channel at the bottom, the size of each channel is set according to the size of the circulation ball, which is 105% to 115% of the diameter of the circulation ball, and the position of the channel from the bottom increases by 30% to 50% of the diameter of the previous level of circulation ball;

[0136] 12 Circulation ball separation shell structure, in order to achieve the circulation of the ball from the center to the bottom of each area smoothly, its bottom surface is designed as a special-shaped surface structure, the specific surface equation is as follows:

[0137]

[0138] Among them, R 2 The bottom radius of the built-in mechanism for separating the circulating balls.

[0139] a, b, and c are mainly related to the size of the circulating spheres.

[0140] The method of using it is: put the circulating balls into the appropriate positions in turn, mainly through the 15 circulating ball alignment cylinder to drive the 20 swing rod to extend into the appropriate position in the 13 detection ring pipe fitting, generally 5 to 10 mm away from the outer diameter of the pipeline. When the circulating balls hit the 20 swing rods in turn, due to the cross holes on the circulating balls, the 20 swing rods will hang on one of the holes in the circulating balls, so that one of the circulating balls is facing downwards and the other is on the 20 swing rods. At this time, the 16 visual detector and the 17 bottom visual detector capture the relevant data of the circulating balls, and perform calculations and evaluations.

[0141] 1. The circulating medium lifting component is connected to the Ⅳ circulating medium and cracking solid phase product separation system through a flange, and the 1. The circulating medium lifting component is connected to the 6. The 6. The cover plate is connected to the 12. The circulating ball separation shell structure is connected through bolts; the 4. The sealing end cover is connected to the 6. The cover plate is connected to the 6. The cover plate is connected to the 8. The motor transmission component is connected to the 8. The transmission shaft is installed with a 9. The bearing is installed on the 8. The transmission shaft is connected to the 11. The circulating ball separation built-in mechanism is connected through a 10. The 13. The detection ring pipe is respectively connected to the 21. The circulating ball splitter and the conveying pipeline are connected through flanges, and the 21. The circulating ball splitter is welded to the 12. The detection rack is welded to the 13. The detection rack is equipped with a 15. The circulating ball alignment cylinder, 20. The swing rod and 16. The visual detector;

[0142] The clamp ring 19 is fixed on the conveying pipeline, and the clamp ring 19 is connected to the bottom visual detection fixing plate 18 by bolts, and the bottom visual detector 17 is installed on the bottom visual detection fixing plate 18;

[0143] Four detection channels are opened in the 13 detection ring pipe at a 90-degree distribution, followed by four groups of 15 circulating ball alignment cylinders and 16 visual detectors.

[0144] Based on the above method and equipment system, the waste tire rotary kiln pyrolysis reactor of the present invention evaluates the reaction life of the pyrolysis reactor through circulating medium (implemented on the basis of my invention patent: automatic separation method and equipment for industrial continuous pyrolysis of whole waste tires CN202110357805.1)).

[0145] The specific treatment process of waste tire rotary kiln pyrolysis is as follows:

[0146] Waste tires and circulating pellets (a certain amount and size) continuously enter (II pyrolysis reactor main system) through (Ⅰ continuous feeding system). (Ⅱ pyrolysis reactor main system) maintains a temperature between 450℃ and 500℃ under the action of (IX combustion and heating system). The waste tires entering (Ⅱ pyrolysis reactor main system) continuously decompose at this temperature. The generated gas components are condensed and collected by (VI pyrolysis oil grade automatic collection system) under the action of the fan. The non-condensable combustible gas that cannot be condensed is treated by (VII pyrolysis non-condensable combustible gas recycling system) and then provided as fuel to (IX combustion and heating system) to provide heating for the system. After the waste tire enters the pyrolysis reactor, it moves forward under the action of the spiral structure in the pyrolysis reactor until it moves to the (Ⅳ circulating medium and pyrolysis solid phase product separation system). At this time, the waste tire has been completely decomposed, leaving only the circulating medium and the pyrolysis solid phase product, which are separated under the action of the (Ⅳ circulating medium and pyrolysis solid phase product separation system). The pyrolysis solid phase product is collected into the pyrolysis solid phase collection bin through the (Ⅴ pyrolysis solid phase product transportation system); the circulating medium is detected by the (Ⅲ circulating medium corrosion detection device and system) to evaluate the condition of the pyrolysis reactor in real time and detect its corrosion condition. The exhaust gas generated by the (Ⅸ combustion heating system) is treated by the (Ⅷ modular distributed intelligent exhaust gas comprehensive treatment system) and then discharged.

[0147] The specific detection and evaluation process of the circulating ball in the III circulating medium corrosion detection device and system is as follows:

[0148] The circulating balls are lifted to the circulating ball separation part by the 1 circulating medium lifting part, in which the 11 circulating ball separation built-in mechanism realizes the rotation of the 11 circulating ball separation built-in mechanism through the 8 transmission shaft under the action of the 2 motor transmission part, so that the circulating balls enter the 1# area, the 2# area, and the 3# area respectively according to their sizes. Under the rotation of the 11 circulating ball separation built-in mechanism, the circulating balls sequentially pass through the 13 detection ring pipe from the channel of the 12 circulating ball separation shell structure according to their sizes.

[0149] During the falling process of the circulating ball 13, the circulating ball is driven by the 15 circulating ball straightening cylinder to drive the 20 swing rod to extend into the appropriate position in the 13 detecting ring pipe fitting, which is generally 5 to 10 mm away from the outer diameter of the pipe. When the circulating ball hits the 20 swing rods in turn, due to the cross holes on the circulating ball, the 20 swing rods will hang on one of the holes in the circulating ball, so that one of the circulating balls is facing downward and the other is on the 20 swing rods. At this time, the 16 visual detector and the 17 bottom visual detector capture the relevant data of the circulating ball, and perform calculations and evaluations. Finally, the circulating ball is connected to the bottom of the cracking reactor through B and placed in the cracking reactor.

[0150] (2) Example of evaluating the reaction life of the double-helix pyrolysis reactor of waste plastics by circulating medium (implemented on the basis of my invention patent: A method and equipment for low-temperature industrial continuous catalytic pyrolysis of waste organic polymer materials CN2019113410929))

[0151] Under the conditions of this cracking equipment, the specific detection and evaluation process of the circulating ball in the III circulating medium corrosion detection device and system is exactly the same as that of Implementation Example 1.

[0152] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for evaluating the life of waste rubber and waste plastic cracking equipment, characterized in that: The steps include: Step 1: According to the different materials of the kettle body and internal structure of the cracking equipment, spherical media of different sizes and corresponding materials are prepared and circular holes of different sizes are opened. The spherical media moves in the cracking reaction equipment together with the cracking raw materials. The circular hole size and corrosion depth on the spherical media are regularly detected. The service life of the waste rubber and waste plastic cracking equipment is evaluated by the change of circular hole size and corrosion depth; The size of the spherical medium is mainly determined by the thickness of the kettle body and internal structural materials of the cracking equipment. The thicker the thickness, the smaller the ball radius of the spherical medium and the larger the size of the circular hole opened on it; conversely, the thinner the thickness, the larger the ball radius of the spherical medium and the smaller the size of the circular hole opened on it; the rules to be followed are: Where k1 is related to the reactor diameter θ, k1=(0.05~0.1)θ,θ≥1.5m, k1 takes the lower limit, θ≤1m, k1 takes the upper limit, r 孔 =k2R 球 +0.5(h 厚 +R 球 ), where k2 is mainly related to the carbon content of the circulating medium material, k2=1.1~1.2, the carbon content of the circulating medium material is ≤0.50%; k2=1.4~1.5, carbon content of circulating medium material>0.50% Step 2: Establish relevant judgment criteria for evaluating the degree of corrosion of the cracking reactor through the change in the size of the circular hole of the spherical medium. The corrosion status of the cracking reactor is reflected in real time through the two parameters of the circular hole diameter change and the corrosion depth. Establish a database for evaluating the degree of corrosion of the cracking reactor based on test data related to the circular hole diameter change and the corrosion depth. Real-time detection of the circular hole diameter change and the corrosion depth will be given, and an alarm will be given when a significant difference is found.

2. The method for evaluating the life of waste rubber and waste plastic cracking equipment according to claim 1, characterized in that: The circular holes on the spherical medium are cross holes opened on the spherical circulating medium; the cross holes have different sizes, and the hole size of each circulating medium is based on the small hole size, and the large hole size of the circulating medium is r 大孔 =1.8r 孔 .

3. The method for evaluating the life of waste rubber and waste plastic cracking equipment according to claim 1, characterized in that: The number of media of each structural material of the spherical medium is between 10 and 15, the ball radius is between 5 and 30 mm, and the hole size, ball radius and number of media follow the following rules: m=K3r 孔 +(K1-K2)R 球 , where K3 is related to the reactor speed n, When n>1.8r / min, K3=1.25~1.35; When n≤1.8r / min, K3=1.05~1.15; The spherical circulating medium moves with the cracking raw material in the cracking reaction equipment. The cracking raw material is completely cracked under high temperature conditions. The circulating medium and cracking solid phase product separation system are used to separate the circulating small balls from the solid phase cracking products. The circulating ball is used in the circulating medium corrosion condition detection device and system to align the circulating ball, capture the hole size, and evaluate the corrosion condition; The service life of waste rubber and waste plastic cracking equipment is evaluated by the change in circular hole size and corrosion depth. The visual technology is used to capture the circular hole size and corrosion depth on the spherical medium during the transportation process. The expanded diameter range and corrosion depth of the circular hole on the medium are measured by computer technology and compared with the original data.

4. The method for evaluating the life of waste rubber and waste plastic cracking equipment according to claim 1, characterized in that: The relevant judgment criteria for evaluating the corrosion degree of cracking reactors using spherical media are mainly to comprehensively judge the corrosion of reactors by controlling the percentage of circular hole enlargement and the percentage of corrosion depth to make a multi-parameter comprehensive judgment; The multi-parameter comprehensive judgment of the percentage of circular hole expansion and the percentage of corrosion depth mainly refers to three methods: evaluating the service life of cracking equipment by the percentage of circular hole expansion, evaluating the service life of cracking equipment by the percentage of corrosion depth, and evaluating the service life of cracking equipment by combining the two parameters of the percentage of circular hole expansion and the percentage of corrosion depth. The respective evaluation criteria are as follows: (1) Evaluate the service life of cracking equipment by the percentage of circular hole size expansion; First determine Δr(r 孔 ) and 0.75Δr(r 大孔 ) Whichever value is larger, in the subsequent calculation, the Δr of which hole of the circulating medium is used as the basis; If Δr(r 孔 )≥0.75Δr(r 大孔 ),but Stop for maintenance and replace key components; If the error is within the range of (55% to 45%), an alarm will be issued and the equipment will be ready for maintenance. The maximum service life shall not exceed 2 months. It is within the range of (45% to 25%), and the equipment is maintained normally; If Δr(r 孔 )<0.75Δr(r 大孔 ),but Stop for maintenance and replace key components; If the equipment is within the range of (45% to 35%), an alarm will be issued and the equipment will be ready for maintenance. The maximum service life shall not exceed 2 months. It is within the range of (35% to 15%), and the equipment is maintained normally; (2) Evaluate the service life of cracking equipment by corrosion depth percentage; First determine the corrosion depth Δh of small and large holes in the circulating medium; If Δh(h 孔 )≥0.95Δh(h 大孔 ),but h 孔 Total length of the small hole Stop for maintenance and replace key components; If it is within the range of (45% to 25%), an alarm will be issued and the equipment will be ready for maintenance. The maximum service life shall not exceed 2 months. It is within the range of (15% to 5%), and the equipment is under normal maintenance; If Δh(h 孔 )<0.95Δh(h 大孔 ),but h 大孔 Total length of large hole Stop for maintenance and replace key components; If the error is within the range of (35% to 15%), an alarm will be issued and the equipment will be ready for maintenance. The maximum service life shall not exceed 2 months. It is within the range of (10% to 5%), and the equipment is under normal maintenance; (3) The service life of cracking equipment is evaluated by two parameters: the percentage of circular hole enlargement and the percentage of corrosion depth. 大孔 ) and Δh(h 孔 ) is the basis for judgment, Stop for maintenance and replace key components; If it is within the range of (15% to 10%), an alarm will be issued and the equipment will be ready for maintenance. The maximum service life shall not exceed 1 month. It falls within the range of (8% to 5%) and the equipment is maintained normally.

5. The method for evaluating the life of waste rubber and waste plastic cracking equipment according to claim 1, characterized in that: There are three methods for evaluating the service life of cracking equipment. In the actual evaluation process, if only one of them reaches the relevant value, a corresponding alarm indication will be given.

6. The method for evaluating the life of waste rubber and waste plastic cracking equipment according to claim 1, characterized in that: The corrosion status of the cracking reactor is reflected in real time through the two parameters of the circular hole diameter change and the corrosion depth. The circular hole size and corrosion depth on the spherical medium are captured by visual technology, and the expanded diameter range and corrosion depth of the circular hole on the medium are measured by computer technology, and compared with the original data.

7. A system for evaluating the service life of waste rubber and waste plastics cracking equipment, applicable to the method for evaluating the service life of waste rubber and waste plastics cracking equipment as described in claims 1-6, characterized in that: It includes motor transmission parts, elastic coupling, sealing end cover, observation window, cover plate, frame, transmission shaft, bearing, flat key, circulating ball separation built-in mechanism, circulating ball separation shell structure, detection ring pipe fittings, detection frame, circulating ball alignment cylinder, visual detector, bottom visual detector, bottom visual detection fixing plate and retaining ring. Under the action of the whole, continuous separation and online detection of circulating medium can be realized, the service life of the cracking reactor can be evaluated according to the corrosion condition of the circulating medium, and the corrosion condition of the cracking reactor can be grasped in real time.

8. The system for evaluating the service life of waste rubber and waste plastic pyrolysis equipment according to claim 7, characterized in that: The main structure of the built-in mechanism for separating the circulating small balls is to divide it into the first area, the second area, and the third area by the prism plates. The size of each area is set in sequence according to the size of the circulating small balls, and the circumference of the first area, the second area, and the third area is mirrored to 360 degrees to form the main structure of the built-in mechanism for separating the circulating small balls; The circulating ball separation shell structure has a 1# circulating ball channel, a 2# circulating ball channel, and a 3# circulating ball channel at the bottom. The size of each channel is set according to the size of the circulating ball, which is 105% to 115% of the diameter of the circulating ball. The distance between the channel and the bottom increases by 30% to 50% of the diameter of the previous circulating ball. The circulating ball separation shell structure, in order to achieve the smooth flow of the circulating balls from the center to the bottom of each area, its bottom surface is designed as a special-shaped curved surface structure. The specific surface equation is as follows: Among them, R is the bottom radius of the built-in mechanism for separating the circulating balls, and a, b, and c are mainly related to the size of the circulating balls.

9. The system for evaluating the service life of waste rubber and waste plastic pyrolysis equipment according to claim 7, characterized in that: The method of use is: put the circulating balls into the appropriate positions in turn, mainly through the circulating ball alignment cylinder to drive the swing rod to extend into the appropriate position in the detection ring pipe fitting, generally 5 to 10 mm away from the outer diameter of the pipeline. When the circulating balls hit the swing rod in turn, due to the cross holes on the circulating balls, the swing rod will hang on one of the holes in the circulating balls, so that one of the circulating balls is facing downwards and the other is on the swing rod. At this time, the visual detector and the bottom visual detector capture the relevant data of the circulating ball, and perform calculations and evaluations.

10. The system for evaluating the service life of waste rubber and waste plastic pyrolysis equipment according to claim 7, characterized in that: The circulating medium lifting component is connected to the ring medium and the cracking solid phase product separation system through a flange, and the circulating medium lifting component is connected to the cover plate through a flange; the cover plate is connected to the circulating ball separation shell structure through bolts; the sealing end cover is connected to the cover plate through bolts; the motor transmission component is connected to the transmission shaft through an elastic coupling, a bearing is installed on the transmission shaft, and the transmission shaft is connected to the circulating ball separation built-in mechanism through a flat key; the detection ring pipe fitting is respectively connected to the circulating ball diverter plate and the conveying pipeline through a flange, the circulating ball diverter plate and the circulating ball separation shell structure are welded together, and the detection frame is welded to the detection ring pipe fitting, and the detection frame is equipped with a circulating ball straightening cylinder, a swing rod and a visual detector; The clamping ring is fixed on the conveying pipeline, and the clamping ring is connected to the bottom visual detection fixing plate by bolts, and the bottom visual detector is installed on the bottom visual detection fixing plate; Four detection channels are opened in the detection ring pipe at 90 degrees, followed by four groups of circulating ball alignment cylinders and visual detectors.

Images