CN213172203U

CN213172203U - Waste organic high polymer material low-temperature industrial continuous catalytic cracking equipment

Info

Publication number: CN213172203U
Application number: CN202020291783.4U
Authority: CN
Inventors: 汪传生; 田晓龙; 边慧光; 郝国强
Original assignee: Qingdao University of Science and Technology
Current assignee: Qingdao University of Science and Technology
Priority date: 2019-12-23
Filing date: 2020-03-11
Publication date: 2021-05-11
Anticipated expiration: 2030-03-11

Abstract

The utility model discloses a low-temperature industrial continuous catalytic cracking device for waste organic polymer materials, which comprises a dehydration drying device, a cracking device, a heat-conducting medium recovery device and a cracking carbon recovery device which are connected in sequence; a pyrolysis gas condensing device, a pyrolysis gas recycling and burning device, a flue gas circulating system and a flue gas processing device; the dehydration drying device comprises a dehydration drying device a and a dehydration drying device b; the device mainly comprises three stages of crackers, wherein each stage of cracker comprises a large spiral conveying mechanism, a heat supply mechanism, a heat preservation mechanism, a machine barrel, a sealing mechanism, a transmission mechanism and the like; the free conveying and cracking process of the waste organic high polymer materials in cracking can be realized, and the conveying of the materials among all stages of cracking reactors is forcibly realized through a conveyor; the utility model has the advantages of reasonable design, can improve production efficiency, isolated dust pollution realizes automated production.

Description

Waste organic high polymer material low-temperature industrial continuous catalytic cracking equipment

Technical Field

The utility model belongs to the technical field of solid waste cyclic utilization, especially waste rubber, waste plastics and other macromolecular compound's discarded object, concretely relates to old and useless organic macromolecular material low temperature industry serialization catalytic cracking method and equipment.

Background

At present, the waste organic polymer materials refer to organic polymer materials such as waste plastics, waste rubber, oil sludge, coal tar and the like, and a large amount of waste organic polymer materials are generated every year along with the rapid development of economy in China. Taking rubber and plastics as examples, it is counted that the consumption of rubber and plastics in 2017 is about 1300 and 7700 tens of thousands tons respectively, and a large amount of waste rubber and waste plastics are generated. In 2017, China waste tires reach 3 hundred million (1200 ten thousand tons) and waste plastics reach 2500 ten thousand (tons). The yield of oil sludge, coal tar and other organic solid wastes is increased year by year, a large amount of waste organic polymer materials cause serious social burden, the national emphasis is placed, and the compendium of the national medium-long term scientific and technical development planning has set comprehensive pollution control and waste recycling as the priority subjects of key fields.

At present, several existing treatment methods for waste organic polymer materials in China mainly comprise the following steps: the first is the recycling of waste organic polymer materials, such as waste plastics, which are crushed into plastic particles, such as beverage bottles; secondly, the waste water is directly incinerated or buried, and the treatment mode is simple but causes serious pollution to the environment; and thirdly, the fuel oil is generated by recycling, which has low requirements on the quality of the plastic and can create better social benefit and economic benefit.

At present, the existing cracking method of waste organic high-molecular materials has the problems of poor quality of cracked oil products, low degree of continuity and the like. CN201720171105.2 discloses a multi-effect mixing and stirring device for polyurethane resin with a heat-conducting medium introduced inside, which relates to the technical field of polyurethane resin processing equipment and comprises an internal stirring mechanism and an external circulating system, wherein the internal stirring mechanism comprises a stirring device and a heat-conducting medium circulating device, the stirring device comprises a hollow stirring shaft, stirring blades are arranged on the part of the stirring shaft positioned inside a reactor, and a heat-conducting medium conveying device is hermetically arranged on the outer side of the liquid inlet hole of the stirring shaft; the external circulation system comprises a material circulation pump, a feed inlet of the material circulation pump is connected with a material circulation outlet at the bottom of the reactor, and a discharge outlet of the material circulation pump is communicated with a material circulation inlet at the top of the reactor through a material conveying pipeline. The utility model provides a current polyurethane resin agitating unit little with material area of contact, stirring speed is slow, and stirring uniformity is poor, and reaction material temperature diffuses slowly, stirs the inefficiency and reation kettle itself and presss from both sides the poor scheduling problem of cover cooling effect. A waste plastic cracking apparatus CN209602459U relates to three stages of waste plastic cracking, but the three stages of cracking are mainly defined as preheating and harmful gas discharging stage, main cracking generation stage and complete cracking stage according to the form of cracking material, but do not consider the internal relation between cracking raw material, cracking temperature and cracking product.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a method and an apparatus for low-temperature industrial continuous catalytic cracking of waste organic polymer materials, which solve the above problems.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions: a low-temperature industrial continuous catalytic cracking method for waste organic high polymer materials is characterized in that a petroleum fluidized catalytic cracking discharging agent or alkaline oxide with low industrial value is used for catalytically cracking the waste organic high polymer materials to prepare high-value chemical raw materials such as benzene, dimethylbenzene, citric acid and the like;

furthermore, the waste organic high polymer material is a multi-component mixed organic material, and chemical raw materials generated by catalytic cracking of the components are different in types and different in value;

furthermore, the decomposition temperature difference of all components of the waste organic polymer material is large, wherein the PVC decomposition temperature is 250 ℃, the reaction is fastest at 295 ℃, the decomposition temperature of ABS, PP and PE is 350 ℃, the decomposition speed is fastest at 450 ℃, and the decomposition temperature of the high-density plastic material is 480 ℃, and the decomposition reaction is fastest at 550 ℃. Setting multi-stage different cracking temperatures according to different fastest decomposition temperatures of the organic matters in each component;

preferably, the waste organic high polymer material low-temperature industrial continuous catalytic cracking equipment comprises a dehydration drying device, a cracking device, a heat-conducting medium recovery device and a cracking carbon recovery device which are sequentially connected; a pyrolysis gas condensing device, a pyrolysis gas recycling and burning device, a flue gas circulating system and a flue gas processing device;

the dehydration drying device comprises a dehydration drying device a and a dehydration drying device b;

preferably, the cracking device comprises a first-stage cracking reactor, a second-stage cracking reactor and a third-stage cracking reactor which are connected in sequence; a feed inlet is arranged in the first-stage cracking reactor, and a discharge outlet is arranged in the third-stage cracking reactor; the reactor of each stage is internally provided with two special-shaped spiral conveying structures to realize the transportation of materials from the inlet to the outlet of the reactor, the three reactors of the cracking device are connected through high-temperature flue gas circulation pipelines of the cracking reactors of each stage, the three reactors of the cracking device are connected with heat-sending fans of the cracking reactors of each stage, the forced conveying of the materials from the first-stage cracking reactor to the second-stage cracking reactor is realized between the first-stage cracking reactor and the second-stage cracking reactor through a spiral forced feeding conveyor, and the forced conveying of the materials from the second-stage cracking reactor to the third-stage cracking reactor is also realized between the second-stage cracking reactor and the third-stage cracking reactor through the spiral forced feeding conveyor; the upper parts of all three reactors of the cracking device are provided with cracking gas outlets, and then connected with a cracking gas condensing device, so that the gases of the three cracking reactors can be independently recovered; because the cracking temperature of the first-stage reactor is lower, an electric heating mode is adopted, and the energy consumption is saved; a set of independent heat supply and flue gas circulating systems are arranged among the reactors of each stage, and the reactors are mutually independent; the flue gas of the cracking device is discharged after being treated by the flue gas treatment device.

Preferably, the heat transfer medium recovery unit includes the ash separator, the mixture of pyrolysis ash and solid-state heat transfer medium is discharged from last one-level cracker, that is, third-level pyrolysis reactor together, enter into the ash separator, the lifting screw rotates and then drives the mixture to move left in the ash separator under the drive of lifting motor, the lower half part of the barrel of the ash separator is designed into a porous structure, and the diameter of the hole is less than the diameter of the solid-state heat transfer medium, therefore, the mixture is being stirred and moved left by the separating screw in-process, the ash falls to the funnel through the aperture that sets up on the barrel of the ash separator, and then is discharged through the ash outlet.

Preferably, the solid heat-conducting medium is gradually cleaned up under the drive of the screw and is conveyed to the solid heat-conducting medium outlet of the ash separator;

the inlet end of the lifter is connected with the solid heat-conducting medium outlet end of the ash separator through a flange, the inlet end of the solid heat-conducting medium entering the lifter is driven by the lifting screw to climb upwards through rotation, the lifting screw is driven by the lifting motor, the solid heat-conducting medium is lifted to the inlet of the primary cracking reactor through the lifter, enters the primary cracking reactor together with waste plastics, waste rubber and the like to be recycled, and the rotating speed of the adjusting screw can adjust the supply speed of the solid heat-conducting medium.

Preferably, the lower part of the mixed material inlet is connected with an ash separator barrel, a funnel is arranged below the ash separator barrel, an ash outlet is arranged below the funnel, a separation screw is arranged in the ash separator barrel, the separation screw is arranged on the left side of the ash separator barrel and driven by a separator motor arranged on the left side, the lower left side of the ash separator barrel is connected with a connecting flange, the connecting flange is fixedly connected with a lifter barrel, a solid heat-conducting medium outlet is arranged at the bottom of the upper side of the lifter barrel, and a lifting screw is arranged in the lifter barrel and driven by a lifting motor on the upper part.

Preferably, each part of the cracking device comprises a double-screw self-cleaning pyrolyzer, a fully-meshed self-cleaning double-screw pyrolyzing device supported at two ends is adopted, and the device comprises double-screw stirring devices with opposite rotation directions, different rotation directions, smaller lead and complete meshing, namely a right-handed screw and a left-handed screw, a pyrolyzer cylinder body, a positioning flange, a bracket, a motor and a transmission device;

the connection relationship of the transmission device is as follows: the shaft coupling is connected with the gear shaft and the screw rod; the gear shaft is connected with the gear, the bearing block and the coupler rightwards, the coupler and the right-handed screw and the left-handed screw which are meshed with each other are sealed by the sealing device, the bracket upwards supports the pyrolyzer barrel, the right-handed screw and the left-handed screw are arranged in the pyrolyzer barrel, the charging port is connected with the sealing device below, the gas outlet is connected with the left side and the middle area of the sealing device, and the discharge port is connected to the pyrolyzer barrel and is communicated with the space formed by the right-handed screw, the left-handed screw and the pyrolyze;

the electromagnetic heating device is arranged outside the sealing device; the transmission belt is connected with the gear shaft and the motor;

the gas outlet can lead out the gas generated by pyrolysis in a shunting way for recycling;

a temperature sensor is arranged in the pyrolyzer barrel, so that the pyrolysis temperature can be monitored in real time and accurately controlled;

an electromagnetic heating device is covered outside the pyrolyzer barrel;

the waste rubber or waste plastic enters the double-screw pyrolyzer from the feed inlet, when the double-screw pyrolyzer works, the double screws rotate in different directions synchronously, materials are pushed forward for pyrolysis at a certain speed through the screws, and oil gas generated by pyrolysis is connected with a pyrolysis gas condensing device through a gas outlet above the reactor; the double screws are meshed with each other through threads, and the materials and the residues are alternately cleaned between the right-handed screw and the left-handed screw of the two screws.

Preferably, the dehydration drying device a is a primary single-screw dehydration extruder, and the dehydration drying device b is a secondary drying feeding extruder; the high-efficiency dehydration is realized through the special-shaped screw in the primary single-screw dehydration extruder, the drying and continuous feeding functions are realized through the secondary drying feeding extruder (also a subsequent plasticizing extruder), and the two extruders are connected with each other;

the first-stage single-screw dehydration extrusion special-shaped screw adopts an equal-depth variable pitch design, a rectangular screw groove and a compression ratio of more than 5;

the screw special for the secondary drying feeding extruder of the dehydration drying part realizes forced feeding, avoids air from entering a cracking furnace, and can realize sealing in the cracking feeding continuous process;

the discharge port of the first-stage single-screw dehydration extruder is vertically connected with the extrusion feed port of the second-stage drying feed extruder, or a material storage mechanism is arranged in the middle of the first-stage single-screw dehydration extruder;

preferably, the dehydration drying device comprises a dehydration extruder, a plasticizing extruder, a blower, a storage bin and a conveying pipe, wherein the dehydration extruder, the storage bin, the conveying pipe and the plasticizing extruder are sequentially connected;

the dehydration extruder comprises a motor, a belt pulley, a reduction gearbox, a rack, a machine barrel, a dehydration screw, a machine head and a material conveying machine head;

the machine barrel is arranged on the rack, a dehydration screw is arranged in the machine barrel, the front end of the machine barrel is fixedly provided with a machine head, the front end of the machine head is fixedly connected with a material conveying machine head, and the front end of the material conveying machine head is fixedly connected with a storage bin; one side of the storage bin is connected with the blower, and the other side of the storage bin is connected with the conveying pipe; the end part of the material conveying pipe is provided with an exhaust net and is communicated with a charging opening of the plasticizing extruder;

a machine barrel drain hole is formed in the lower portion of the machine barrel, a machine head drain hole is formed in the lower end of the machine head, a material conveying machine head drain hole is formed in the lower end of the material conveying machine head, and a storage bin drain hole is formed in the lower end of the storage bin;

the machine barrel drain hole, the machine head drain hole, the material conveying machine head drain hole and the storage bin drain hole are respectively communicated with a drain channel;

a pin structure is arranged in the gap of the dehydration screw;

the outer side of the machine barrel is provided with an electromagnetic coil, and the machine barrel is provided with a coil protective cover and is heated in an electromagnetic induction mode.

Preferably, the cracking reactor is filled with a heat-conducting medium, the heat-conducting medium moves along with the materials until the materials are discharged from an outlet of the third-stage cracking reactor, and the materials are conveyed into the first-stage cracking reactor again through a heat-conducting medium recovery device; the shape of the heat-conducting medium is preferably in a regular three-face shape, and the heat-conducting medium is moved together with the material through the mutual movement of the heat-conducting medium and the material, so that the mixing and dispersing effects of the material are enhanced, the uniform heating of the material is realized, and the formation of coking in the cracking process is avoided;

preferably, the discharging part stops air from entering the cracking furnace through the accumulation of the cracking carbon in the conveying process, so that the sealing in the cracking continuous process is realized;

the shape of the heat-conducting medium is a regular trihedron;

the heat-conducting medium is automatically reintroduced into the primary cracking reactor from the tertiary cracking reactor in the cracking process of the waste plastics and the waste tires, so that the internal circulation process of the heat-conducting medium is realized;

inorganic impurities mixed with the pyrolysis gas enter a pyrolysis gas condensing device under the action of high-pressure airflow of the pyrolysis reactor, and the pyrolysis gas firstly passes through a heavy oil separator in the condensation and collection process to settle most of the inorganic impurities; then connecting with two oil product collecting tanks connected in series to settle most waxy oil products; and the unsettled pyrolysis gas enters a heat exchanger of the pyrolysis tube and finally enters an oil product collecting tank, and the uncondensed pyrolysis gas is collected from the oil product collecting tank for later use.

Preferably, the cracking gas condensing device comprises a heavy oil separator, a heavy oil storage tank, a heat exchanger, an oil final storage tank and a cracking gas conveying pipe;

the cracking gas conveying pipes of all stages of cracking reactors are respectively connected with respective heavy oil separators, the heat exchangers are respectively connected with the respective heavy oil separators, and the heat exchangers of the cracking pipes are respectively connected with respective oil product collecting tanks;

the uncondensed pyrolysis gas is combusted by a subsequent special combustor to supply heat for the cracking device.

Preferably, the waste organic high polymer material low-temperature industrial continuous catalytic cracking equipment utilizes alkali spraying to treat acid gases such as sulfur dioxide, hydrogen sulfide and the like in cracking tail gas; macromolecular organic matters in the cracked tail gas are treated by a photo-oxygen catalysis method;

the pyrolysis carbon recovery device comprises a multi-stage pyrolysis carbon recovery conveyor, namely a multi-stage discharging conveyor, wherein each group of conveyors mainly comprises a motor, a conveying screw rod, a machine barrel, a cooling part and a sealing part, and finally the final stage of discharging conveyor conveys the pyrolysis carbon into a pyrolysis carbon collection bin;

the multi-stage pyrolysis carbon recovery conveyor comprises a first-stage discharging conveyor and a second-stage discharging conveyor; the secondary discharging conveyor is communicated with the pyrolysis carbon collection bin;

the pyrolysis gas recycling combustion device comprises a combustor, a pyrolysis gas conveying pipeline, a safety valve, a pressure control device and the like;

the flue gas treatment device comprises a spray tower, a fan and a photo-oxidation catalysis tail gas treatment device.

The technical scheme of the utility model following advantage and beneficial effect have at least:

1. the utility model discloses a cracking device for preparing chemical raw materials by low-temperature industrial continuous catalytic cracking of waste organic polymer materials, which mainly comprises three stages of crackers, wherein each stage of cracker comprises a large screw conveying mechanism, a heat supply mechanism, a heat preservation mechanism, a machine barrel, a sealing mechanism, a transmission mechanism and the like; the method can realize the free conveying and cracking process of the waste organic high polymer materials in cracking, and forcibly realize the conveying of the materials among all stages of cracking reactors through a conveyer.

2. The utility model discloses a waste organic polymer material low temperature industry serialization catalytic cracking prepares industrial chemicals method and equipment utilizes organic waste polymer material catalytic cracking to prepare high value industrial chemicals to realize the serialization of schizolysis process, have good economic benefits and huge social.

3. The utility model discloses a waste organic polymer material low temperature industry serialization catalytic cracking preparation industrial chemicals method and equipment can realize that waste organic polymer material different component cracking in-process result is collected respectively, realizes the advantage of cracking in-process result high quality stability, has reduced the undulant influence of product quality.

4. The double-screw self-cleaning pyrolyzer adopts the spiral blade structure with opposite rotation directions, different rotation directions, smaller lead and complete meshing, and the clearance between the screw and the barrel wall is smaller, thereby enhancing the shearing action on materials, realizing self-cleaning in the pyrolysis process and avoiding blockage caused by coking; the material has been guaranteed to less helical pitch to impel forward slowly, increases dwell time, makes the pyrolysis more abundant, and great helix angle makes the material receive radial force to increase, and then more abundant with section of thick bamboo wall contact, has increased heat transfer efficiency.

5. The double-screw self-cleaning pyrolyzer adopts the support at two ends and the positioning of the flange plate, reduces the radial displacement, ensures the transmission to be more stable and reliable, and avoids the direct abrasion between the thread blade and the cylinder wall; thereby avoiding the coking phenomenon and leading the residue generated by pyrolysis to be smoothly discharged through the self-cleaning function of the equipment.

6. The utility model discloses an under the stirring of screw rod in the ash content separator, solid-state heat-conducting medium looks friction, adnexed ash content separation on it to through the aperture discharge of barrel, realize ash content and solid-state heat-conducting medium's separation, clean up's solid-state heat-conducting medium gets into the one-level cracker and realizes automatic cycle utilization under the effect of lifting mechanism. The utility model has the advantages of reasonable design, can improve production efficiency, isolated dust pollution realizes automated production.

Drawings

FIG. 1 is the overall process flow diagram of the present invention;

FIG. 2 is an overall three-dimensional view of the present invention;

FIG. 3 is a general view of a cracking reactor of the present invention;

FIG. 4 is a view of the single stage reactor of the present invention, i.e. (view of twin screw self-cleaning pyrolyzer); (a) is a three-dimensional stereo picture, (b) is a front view, and (c) is a top view;

FIG. 5 is a schematic view of the dehydration drying device of the present invention;

FIG. 6 is a schematic view of a dehydration drying apparatus according to another embodiment of the present invention; (a) is a perspective view; (b) is a top view;

FIG. 7 is a partial cross-sectional view of the dehydration drying apparatus of FIG. 6;

FIG. 8 is a schematic view of the barrel configuration of FIG. 6;

FIG. 9 is a schematic view of the handpiece of FIG. 6;

FIG. 10 is a schematic view of the screw structure of FIG. 6;

FIG. 11 is a schematic view of the cracked carbon recovery apparatus of the present invention;

fig. 12 is a schematic view of the heat transfer medium recovery apparatus of the present invention; (a) is a perspective view; (b) is a partial sectional view;

fig. 13 is a schematic view of the cracked gas condensing apparatus of the present invention;

wherein, the part names corresponding to the reference numbers are as follows: 1, a dehydration drying device; 2 a cracking device; 3 a cracked carbon recovery device; 4 cracking gas condensing device; 5, a flue gas circulating system; 6, a flue gas treatment device; 7, recycling pyrolysis gas into a combustion device, 8, and recycling a heat-conducting medium;

wherein 1-1 grade single screw dewatering extruder; 1-2 secondary drying feeding extruders;

2-1 first-stage cracking reactor; 2-2 second-stage cracking reactor; 2-3 three-stage cracking reactors;

3-1, a first-level discharging conveyor; 3-2 second-level discharging conveyors; (there may be more stages) 3-3 cracked carbon collection bins;

4-1 heavy oil separator; 4-2 heat exchanger; 4-3 oil product collection tank;

2-11 high-temperature flue gas circulation pipelines of all stages of cracking reactors;

2-12 heat-supply fans of all stages of cracking reactors;

2-13 forced feeding conveyer between the first-stage cracking reactor and the second-stage cracking reactor;

a forced feed conveyor between the second-stage cracking reactor and the third-stage cracking reactor from 2 to 14;

2-15 tail gas discharge ports of all stages of cracking reactors;

2-16 feed inlets of all stages of cracking reactors;

21-a motor; 22-a transmission belt; 23-a gear; 24-a bearing seat; 25-a coupler; 26-a sealing device; 27-air outlet; 28-an electromagnetic heating device; 29-a feed inlet; 210-a scaffold; 211-a discharge hole; 212-right-handed screw; 213-left-handed screw; 214-a pyrolyzer barrel;

100-barrel; 101-an electromagnetic coil; 102-coil shield; 103-barrel drain holes; 200-a machine head; 201-nose drain hole; 300-a storage bin; 301-a storage bin drain hole; 302-a blower; 303-an exhaust network; 304-a feed delivery pipe; 401-material conveying machine head; 402-a delivery head drain hole; 404-a drainage channel; 502-a motor; 503-a pulley; 504-reduction gearbox; 600-dewatering extruder; 601-a dewatering screw; 602-a frame; 603-pin structure; 700-plasticizing extruder.

3-1, a first-level discharging conveyor; 3-2 two-stage discharging conveyors (more stages can be provided); 3-3 a collection bin for cracked carbon.

The device comprises an 8-1 mixed material inlet, an 8-2 ash separator cylinder, an 8-3 funnel, an 8-4 ash outlet, an 8-5 connecting flange, an 8-6 separator motor, an 8-7 separating screw, an 8-8 lifter cylinder, an 8-9 lifting screw, an 8-10 lifting motor and an 8-11 solid heat-conducting medium outlet.

4-1 heavy oil separator 4-2 heat exchanger 4-3 oil product collecting tank (between 4-1 and 4-2 there are several oil-gas separators not shown in the figure);

and a pyrolysis gas conveying pipe 4-4.

Detailed Description

The present invention will be described with reference to the accompanying drawings and specific embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them.

Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of some embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "back" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the product of the present invention is usually placed when used. Such terms are merely for convenience in describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be taken as limiting the invention.

It is further noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1-13, a low-temperature industrial continuous catalytic cracking method for waste organic polymer materials comprises the following steps:

(1) the method comprises the following steps of (1) early-stage treatment of waste organic high polymer materials: screening other inorganic impurities such as stones, scrap iron and the like from the waste organic polymer material through the technological processes of winnowing, crushing and the like;

(2) dehydrating and drying the waste organic high polymer material: the waste organic high polymer materials subjected to primary screening are subjected to dehydration and drying treatment, so that the influence of moisture in the materials on the quality of the cracking products is reduced; the step is mainly to carry out high-efficiency dehydration and drying by two special extruders under different process parameters.

Wherein, the process comprises a low-temperature high-efficiency dehydration process and a drying feeding process;

the low-temperature high-efficiency dehydration process flow comprises the following steps: the process is mainly carried out in a primary single-screw dehydration extruder 1-1, the dehydration temperature of the waste material is set to be 60 ℃ in the dehydration process, and the moisture in the waste material is not gasified; waste organic high polymer materials are continuously conveyed into a hopper bin of a primary single-screw dehydration extruder 1-1 through a conveying belt, the primary single-screw dehydration extruder 1-1 continuously eats the waste high polymer materials into the primary single-screw dehydration extruder 1-1 at a certain rotating speed (2-7 rpn), the extruder screw is of an equal-depth variable pitch type, the front and rear compression ratio reaches 5, a special-shaped screw groove structure (rectangular screw groove) is adopted, a special structure for a vacuumizing screw is designed at the tail end of the screw, water in the materials can be efficiently extruded by utilizing the large compression ratio, and micro water in the waste materials can be further removed through a vacuumizing device.

A drying and feeding process: the process is mainly carried out in a secondary drying feeding extruder 1-2, the waste organic high polymer materials dehydrated by the primary single-screw dehydration extruder 1-1 continuously enter the secondary drying feeding extruder 1-2 for drying, the heat source of the drying process is high-temperature flue gas from a heating cracker, the drying temperature is set at 200 ℃, and the dried waste high polymer materials are continuously conveyed into a cracking furnace in the secondary drying feeding extruder 1-2.

(3) The waste high polymer material staged catalytic cracking process comprises the following steps: the waste high polymer material is a complex organic material system with multiple components mixed, the difference of cracking products of each group is large, the values of the products are different, the cracking process technology is divided into a multi-section catalytic cracking process according to the difference of the decomposition temperature of each component, wherein the PVC decomposition temperature is 250 ℃, and the reaction speed is the fastest at 295 ℃; the decomposition temperature of ABS, PP and PE is 350 ℃, the decomposition speed is fastest at 450 ℃, and the decomposition temperature of the high-density crosslinked organic solid waste is 480 ℃, and the decomposition reaction is fastest at 550 ℃.

Setting the temperature of a cracking reactor to be 300 ℃, 450 ℃ and 550 ℃ respectively according to the decomposition temperature of the components, feeding the dried and dehydrated waste organic high polymer materials into a 300 ℃ primary cracking reactor 2-1, wherein the reactor is 6 m long and consists of two spiral ribs with the inner diameter of 5 m, and moving the tail end of a continuous reactor for the waste high polymer materials under the pushing action of the spiral ribs;

the residual organic high-molecular material melt is fed into a second-stage cracking reactor 2-2 through a forced feeding conveyor 2-13 between a first-stage cracking reactor 2-1 and the second-stage cracking reactor 2-2, the cracking temperature of the reactor is set to 450 ℃, most organic materials such as ABS, PP, PE and the like in the melt are cracked, the total length of the second-stage cracking reactor 2-2 is 8 meters, and the second-stage cracking reactor is composed of two spiral edges with the inner diameter of 3 meters, the tail end of a waste high-molecular material continuous reactor is moved under the pushing action of the spiral edges, because the waste high-molecular material contains more components such as ABS, PP and PE and accounts for about 65 percent of the total material, the length of the reactor is longer, the waste organic high-molecular material becomes the melt at the moment, the flow is easy, the volume is reduced, the inner diameter of the spiral edges is shortened, the length and the inner diameter of the second-stage cracking reactor 2-2 are mainly equal to the proportion of the components of the (ii) related; the materials cracked by the second-stage cracking reactor 2-2 are basically refractory high-density crosslinked organic solid wastes, the cracking temperature is higher, the materials enter the third-stage cracking reactor 2-3 through a forced feeding conveyor 2-14 between the second-stage cracking reactor 2-2 and the third-stage cracking reactor 2-3, the cracking temperature is set to 550 ℃, the length of the reactor is 5 meters, the reactor consists of two spiral edges with the inner diameter of 3 meters, the tail end of a waste high polymer material continuous reactor moves under the pushing action of the spiral edges, and the partial reactor mainly fully cracks the high-density crosslinked organic materials; the upper part of each cracking reactor is provided with a cracker collecting port.

(4) Cracked gas generated by three stages of cracking reactors (2-1,2-2,2-3) is condensed and collected, in order to collect cracked products of all components, an independent cracked gas condensing device 4 is arranged behind each reactor, and the cracked gas condensing devices 4 are arranged according to a settling tower, a first-stage heavy oil collecting tank, a second-stage heavy oil collecting tank, a heat exchanger 4-2, an oil product collecting tank 4-3 and the like; wherein the inner diameter of the settling tower is 0.8 meter, the length is 1.5 meters, the total volume of the first-stage heavy oil collecting tank and the second-stage heavy oil collecting tank (namely the heavy oil separator 4-1) is 15 cubic meters, the total heat exchange area of the heat exchanger 4-2 is 30 cubic meters, the total volume of the oil product collecting tank 4-3 is 10 cubic meters, and the volume of each part is closely related to the processing capacity of the continuous connector.

(5) In the cracking process of the waste organic high polymer material, because the waste high polymer material has poor heat conductivity and is subjected to reverse coking, heat-conducting media with different specifications are added in the cracking process, the heat-conducting media are added in a dehydration drying extruder in the idle running and heat preservation operation process of cracking equipment, and move along with the material in the cracking process of the waste organic high polymer material, so that the organic material is uniformly heated through the heat-conducting media, and the movement of the heat-conducting media drives the movement of a melt material to prevent the melt from being coked due to the fact that the melt is still on the wall and the spiral of a reactor; after passing through the three-stage cracking reactor 2-3, the heat-conducting medium is recycled by a separate recycling device and enters the first-stage cracking reactor 2-1, so that the heat-conducting medium is not discharged along with cracked carbon;

(6) cracked carbon generated after passing through the three-stage cracking reactors (2-1,2-2,2-3) is continuously discharged through a cracked carbon recovery device 3, and the part is mainly provided with three-stage cooling conveyors, wherein the temperature of cooling water is set to be room temperature in the conveying process, the three-stage cooling conveyors are respectively 2 meters long, so that the cracked carbon is cooled and then is reduced in temperature, and then is conveyed to a cracked carbon recovery bin 3-3.

(7) The high temperature environment of the cracking process is mainly that the temperature in a combustion chamber is heated by a burner, and then the cracking furnace is heated by high-temperature flue gas, so that two burners are arranged in the cracked three-stage cracking reactor 2-3, wherein the first-stage cracking reactor 2-1 supplies heat in an electric heating mode, meanwhile, cracked gas generated by cracking is supplied to the three-stage cracking reactor 2-3, and gas generated by cracking is condensed into oil, and enters an independent burner for combustion after drying, desulfurization and pressure stabilizing treatment, so as to supply heat for the three-stage cracking reactor 2-3.

(8) After passing through the cracking reactor, most of heat of the high-temperature gas heated by the burner is not utilized, and a large amount of energy is wasted by directly passing through a tail gas device, so that the high-temperature flue gas is divided into three parts for recycling, and the high-temperature flue gas is used for dehydrating and heating waste organic high polymer materials; secondly, the drying and heating of the waste high polymer materials are carried out; and thirdly, the fuel is recycled into the combustion chamber.

(9) The flue gas is recycled and must be treated and then discharged, and the tail gas treatment device mainly comprises a series of environment-friendly equipment such as a spray tower, a fan, a light oxygen catalytic cracking device and the like, so that the discharge of the tail gas meets the national standard requirements.

As shown in fig. 1-13, a low-temperature industrial continuous catalytic cracking device for waste organic polymer materials comprises a dehydration drying device 1, a cracking device 2(2-1,2-2,2-3), a heat-conducting medium recovery device 8, and a cracked carbon recovery device 3(3-1,3-2,3-3) which are connected in sequence; a pyrolysis gas condensing device 4(4-1,4-2,4-3), a pyrolysis gas recycling and burning device 7, a flue gas circulating system 5 and a flue gas processing device 6;

the dehydration drying device comprises a dehydration drying device a 1-1 and a dehydration drying device b 1-2;

the cracking device 2 comprises a first-stage cracking reactor 2-1, a second-stage cracking reactor 2-2 and a third-stage cracking reactor 2-3 which are connected in sequence; the three reactors of the cracking device 2 are connected through high-temperature flue gas circulation pipelines 2-11 of all levels of cracking reactors, the three reactors of the cracking device 2 are connected with heat-supply fans 2-12 of all levels of cracking reactors, the first-level cracking reactor 2-1 and the second-level cracking reactor 2-2 are provided with forced feeding conveyors 2-13, the forced feeding conveyors 2-14 from the second-level cracking reactor to the third-level cracking reactor are provided with tail gas discharge ports 2-15 and feed ports 2-16;

as a preferred embodiment of the present invention, the cracking device 2 comprises a first-stage cracking reactor 2-1, a second-stage cracking reactor 2-2, and a third-stage cracking reactor 2-3 connected in sequence; a feed inlet is arranged in the first-stage cracking reactor 2-1, and a discharge outlet is arranged in the third-stage cracking reactor 2-3; two different-shaped spiral conveying structures are arranged in each stage of reactor to realize the transportation of materials from the inlet to the outlet of the reactor, the three reactors of the cracking device 2 are connected by high-temperature flue gas circulating pipelines 2-11 of all stages of cracking reactors, the three reactors of the cracking device 2 are connected with the heat-supply fans 2-12 of all stages of cracking reactors, the forced conveying of materials from the first-stage cracking reactor 2-1 to the second-stage cracking reactor 2-2 is realized between the first-stage cracking reactor 2-1 and the second-stage cracking reactor 2-2 through a spiral forced feeding conveyor 2-13, and the forced conveying of materials from the second-stage cracking reactor 2-2 to the third-stage cracking reactor 2-3 is also realized between the second-stage cracking reactor 2-2 and the third-stage cracking reactor 2-3 through a spiral forced feeding conveyor; the upper parts of all three reactors of the cracking device 2 are provided with cracking gas outlets, and then connected with a cracking gas condensing device 4, so that the gases of the three cracking reactors can be independently recovered; a set of independent heat supply and flue gas circulating system 5 is arranged between each stage of reactor, and each reactor is independent; the flue gas of the cracking device 2 is treated by the flue gas treatment device 6 and then discharged.

As a preferred embodiment of the present invention, the heat transfer medium recovery unit 8 includes an ash separator, the mixture of cracked ash and solid heat transfer medium is discharged from the last cracker, i.e. the third cracking reactor 2-3, and enters into the ash separator, the lifting screw 8-9 in the ash separator is driven by the lifting motor 8-10 to rotate so as to drive the mixture to move to the left, the lower half part of the barrel 8-2 of the ash separator is designed to be porous structure, and the diameter of the hole is smaller than that of the solid heat transfer medium, therefore, in the process that the mixture is stirred by the separation screw 7 and moves to the left, the ash falls into the funnel 8-3 through the small hole arranged on the barrel 8-2 of the ash separator, and is discharged through the ash outlet 8-4;

as a preferred embodiment of the present invention, the solid heat-conducting medium is gradually cleaned under the driving of the screw and is conveyed to the solid heat-conducting medium outlet 11 of the ash separator;

as a preferred embodiment of the utility model, the entrance point of the riser is connected by the flange with solid-state heat-conducting medium export 8-11 end of ash separator, solid-state heat-conducting medium gets into the entrance point of riser and is driven by lifting screw 8-9 is rotatory to climb upwards, lifting screw 8-9 is driven by lifting motor 8-10, solid-state heat-conducting medium is promoted to the entrance of one-level cracker by the riser, gets into one-level pyrolysis reactor 2-1 with waste plastics and carries out cyclic utilization, adjusting screw rotational speed can adjust the supply rate of solid-state heat-conducting medium.

As a preferred embodiment of the utility model, the lower part of the mixed material inlet 8-1 is connected with the cylinder 8-2 of the ash separator, the lower part of the cylinder 8-2 of the ash separator is provided with the hopper 8-3, the lower part of the hopper 8-3 is provided with the ash outlet 8-4, the cylinder 8-2 of the ash separator is internally provided with the separation screw 8-7, the separation screw 8-7 is arranged at the left side of the cylinder 8-2 of the ash separator, the separation screw 8-7 is driven by the separator motor 8-6 arranged at the left side, the lower left side of the cylinder 8-2 of the ash separator is connected with the connecting flange 8-5, the connecting flange 8-5 is fixedly connected with the cylinder 8-8 of the lifter, the bottom of the upper side of the cylinder 8-8 of the lifter is provided with the outlet 8-11 of, a lifting screw 8-9 is arranged in a cylinder 8-8 of the lifter and is driven by a lifting motor 8-10 at the upper part;

as a preferred embodiment of the present invention, each part of the cracking apparatus 2 comprises a twin-screw self-cleaning pyrolyzer, and in order to adopt a fully-meshed self-cleaning twin-screw pyrolysis apparatus supported at two ends, the apparatus comprises a twin-screw stirring apparatus with opposite rotation directions, different rotation directions, smaller lead and complete meshing, i.e. a right-handed screw 212 and a left-handed screw 213, a pyrolyzer barrel 214, a positioning flange, a bracket 210, a motor 21 and a transmission device;

the connection relationship of the transmission device is as follows: the coupling 25 connects the gear shaft and the screw; the gear shaft is connected with the gear 23, the bearing seat 24 and the coupling 25 rightwards, the coupling 25 and the right-handed screw 212 and the left-handed screw 213 which are meshed with each other are sealed by the sealing device 26, the support 210 upwards supports the pyrolyzer barrel 214, the right-handed screw 212 and the left-handed screw 213 are arranged in the pyrolyzer barrel 214, the feeding port 29 is connected with the sealing device 26 below, the air outlet 27 is connected with the left side and the middle area of the sealing device 26, the discharging port 211 is connected with the pyrolyzer barrel 214 and is communicated with the space formed by the right-handed screw 212, the left-handed screw 213 and the pyrolyzer barrel;

the electromagnetic heating device 28 is outside the sealing device 26; the transmission belt 22 is connected with the gear shaft and the motor 21;

further, the gas outlet 27 can shunt out the gas generated by pyrolysis for recycling;

as a preferred embodiment of the present invention, a temperature sensor is disposed in the pyrolyzer barrel 214, which can monitor the pyrolysis temperature in real time for precise control;

the double-screw self-cleaning pyrolyzer adopts a spiral blade structure with opposite rotation directions, different rotation directions, smaller lead and complete meshing, the clearance between the screw and the barrel wall is smaller, the shearing action on materials is enhanced, self-cleaning in the pyrolysis process can be realized, and the blockage caused by coking is avoided;

the smaller lead ensures that the material is slowly pushed forwards, the retention time is prolonged, the pyrolysis is more sufficient, and the larger helical angle enables the material to be subjected to the increased radial force, so that the material is more sufficiently contacted with the cylinder wall, and the heat transfer efficiency is increased;

as a preferred embodiment of the utility model, the double-screw self-cleaning pyrolyzer adopts two-end support and flange disc positioning, so as to reduce radial displacement, ensure more stable and reliable transmission and avoid direct abrasion between the thread blade and the cylinder wall; thereby avoiding the coking phenomenon and leading the residue generated by pyrolysis to be smoothly discharged through the self-cleaning function of the equipment.

The heating mode adopts electromagnetic heating, and the pyrolyzer barrel 214 is externally provided with the electromagnetic heating device 28, so that the heating and temperature rising speed is high.

A double-screw self-cleaning pyrolyzer is characterized in that waste rubber or waste plastic enters the double-screw pyrolyzer from a feed inlet 29, when the double-screw pyrolyzer works, double screws rotate in different directions synchronously, materials are pushed forward to be pyrolyzed at a certain speed through the screws, and oil gas generated by pyrolysis is connected with a condensing pipe of a pyrolysis gas condensing device 4 through an exhaust port 27.

Meanwhile, due to the thread engagement of the double screws, the materials and the residues are alternately cleaned between the right-handed screw 212 and the left-handed screw 213 of the two screws, so that the materials and the residues are scraped away from each other in the pyrolysis process, and the residues are prevented from being attached to the right-handed screw 212 and the left-handed screw 213;

meanwhile, the top end of the screw edge is in small clearance fit with the inner wall of the pyrolyzer, so that the residue adhesion phenomenon of the inner wall of the pyrolyzer is effectively prevented by strong shearing force, and coking is prevented. The residue is discharged from the discharge port 211 by the pushing of the twin screw threads.

The heating mode is electromagnetic heating, the heating speed is high, the reaction conditions required by pyrolysis can be ensured, and the method is energy-saving and environment-friendly. Electromagnetic heating operates stably, and the thermal efficiency is high to also ensure the stability of pyrolysis, avoid producing because of the waste material that the reaction temperature is undulant leads to, lighten the burden for the automatically cleaning pyrolysis of twin-screw. Through the sensor, the reaction temperature is accurately controlled, and the pyrolysis of high polymer materials such as different types of plastics or rubber is realized.

As a preferred embodiment of the present invention, in order to continuously crack and develop a high-efficiency dehydration drying process for waste organic polymer materials, the dehydration drying device a 1-1 is a primary single-screw dehydration extruder 1-1, and the dehydration drying device b 1-2 is a secondary drying feed extruder 1-2; efficient dehydration is realized through the special-shaped screw in the primary single-screw dehydration extruder 1-1, and the drying and continuous feeding functions are realized through the secondary drying feeding extruder 1-2, which are connected with each other.

Furthermore, the primary single-screw dehydration extrusion special-shaped screw adopts an equal-depth variable pitch design, a rectangular screw groove and a compression ratio of more than 5.

Furthermore, in order to realize continuous cracking, a dynamic sealing method for the cracking process is developed, wherein forced feeding is realized through a special screw rod of a secondary drying feeding extruder of a dehydration drying part, air is prevented from being used for a cracking furnace, and sealing in the cracking feeding continuous process can be realized;

as a preferred embodiment of the utility model, the discharge port of the first-stage single-screw dehydration extruder 1-1 is vertically connected with the extrusion feed port of the second-stage drying feed extruder 1-2, or a material storage mechanism is arranged in the middle;

as shown in the drawings, as a preferred embodiment of the present invention, the dehydration drying device includes a dehydration extruder 600, a plasticizing extruder 700, an air blower 302, a storage bin 300, and a material conveying pipe 304, and the dehydration extruder 600, the storage bin 300, the material conveying pipe 304, and the plasticizing extruder 700 are connected in sequence;

the dewatering extruder 600 comprises a motor 502, a belt pulley 503, a reduction gearbox 504, a rack 602, a machine barrel 100, a dewatering screw 601, a machine head 200 and a material conveying machine head 401;

the machine barrel 100 is arranged on a rack 602, a dehydration screw 601 is arranged in the machine barrel 100, the front end of the machine barrel 100 is fixedly provided with a machine head 200, the front end of the machine head 200 is fixedly connected with a material conveying machine head 401, and the front end of the material conveying machine head 401 is fixedly connected with a storage bin 300; one side of the storage bin 300 is connected with an air blower 302, and the other side is connected with a material conveying pipe 304; the end part of the material conveying pipe 304 is provided with an exhaust net 303 and is communicated with a charging opening of the plasticizing extruder 700;

the lower part of the cylinder 100 is provided with a cylinder drain hole 103, the lower end of the machine head 200 is provided with a machine head drain hole 201, the lower end of the material conveying machine head 401 is provided with a material conveying machine head drain hole 402, and the lower end of the storage bin 300 is provided with a storage bin drain hole 301.

The barrel drain hole 103, the head drain hole 201, the material delivery head drain hole 402 and the storage bin drain hole 301 are respectively communicated with a drain channel 404;

a pin structure 603 is arranged in the gap of the dewatering screw 601;

an electromagnetic coil 101 is arranged outside the cylinder 100, and a coil protective cover 102 is arranged, so that the cylinder 100 is heated by electromagnetic induction.

In the working process, waste plastics are added into the cylinder 100 and enter the storage bin 300 through the cylinder 100, the machine head 200 and the material conveying machine head 401; in the process, water gradually seeps out under the extrusion action of the dehydration screw 601 and is discharged into a drainage channel 404 through a barrel drain hole 103, a machine head drain hole 201, a material conveying machine head drain hole 402 and a storage bin drain hole 301, and a certain amount of water vapor is contained in the waste plastics; blowing gas into the storage bin 300 by the blower 302, pushing the waste plastics to enter the plasticizing extruder 700 through the conveying pipe 304, and discharging the blown gas carrying water vapor through the exhaust net 303 in the process so as to further reduce the water content; the waste plastics entering the plasticizing extruder 700 are heated and plasticized in the plasticizing extruder 700 to prepare for the subsequent cracking process.

Further, a plasticizing extruder 700 is connected with the feed inlets 2-16 of the first-stage cracking reactor;

as a preferred embodiment of the utility model, the ejection of compact part stops the air admission pyrolysis furnace through the piling up of schizolysis carbon in transportation process to realize the sealed of schizolysis serialization in-process.

As a preferred embodiment of the utility model, old and useless organic macromolecular material thermal conductivity is relatively poor, and easy coking extremely in the cracking process leads to the unable serialization of cracking process, to this difficult problem, research and development old and useless organic macromolecular material reinforces the new method of heat transfer, and through adding the heat-conducting medium that the enthalpy value is higher, the size is unequal, and the heat-conducting medium shape is the regular trihedron, strengthens old and useless macromolecular material's heat transfer process through the motion of heat-conducting medium in the cracking furnace, makes it be heated evenly, prevents that the coking from generating.

As a preferred embodiment of the utility model, the heat-conducting medium is automatically reintroduced into the first-level cracking reactor 2-1 from the third-level cracking reactor 2-3 in the cracking process of the waste plastics, so that the internal circulation process of the heat-conducting medium is realized, and the heat loss of the heat-conducting medium is avoided.

As a preferred embodiment of the utility model, the components of the cracked product of the waste organic high molecular material are complex, inorganic impurities are mixed into the oil product under the action of high-temperature and high-pressure airflow, and the cracked gas is firstly passed through a heavy oil separator 4-1 in the condensation and collection process to settle most of the inorganic impurities; and two oil product collecting tanks connected in series enable most waxy oil products to be settled; the undeposited cracked gas enters a heat exchanger 4-2 of a cracking tube and finally enters an oil product collecting tank 4-3, and the uncondensed cracked gas is collected for later use.

In the cracked gas condensing device 4 developed by the utility model, cracked gas conveying pipes 4-4 of all levels of cracking reactors are respectively connected with respective heavy oil separators 4-1, heat exchangers 4-2 are respectively connected with respective heavy oil separators 4-1, and heat exchangers 4-2 of cracking pipes are respectively connected with respective oil product collecting tanks 4-3;

as a preferred embodiment of the present invention, the uncondensed cracked gas is combusted by a subsequent dedicated burner to supply heat to the cracking unit 2.

As an optimal embodiment of the utility model, research and development old and useless organic macromolecular material low temperature industry serialization catalytic cracking preparation industrial chemicals pyrolysis gas condensing equipment 4, the device includes heavy oil separator 4-1, heavy oil storage jar, heat exchanger 4-2, the final storage jar of oil, pyrolysis gas conveyer pipe 4-4.

As a preferred embodiment of the utility model, acid gases such as sulfur dioxide, hydrogen sulfide and the like in the cracking tail gas are treated by alkali spraying; macromolecular organic matters in the cracked tail gas are treated by a photo-oxygen catalysis method;

as a preferred embodiment of the present invention, the pyrolysis carbon recovery device 3 comprises a multi-stage pyrolysis carbon recovery conveyor, i.e. a multi-stage discharging conveyor, wherein each group of conveyors mainly comprises a motor, a conveying screw, a machine barrel, a cooling part and a sealing part, and finally the last stage discharging conveyor conveys the pyrolysis carbon to the pyrolysis carbon collection bin 3-3.

Further, the multi-stage pyrolysis carbon recovery conveyor comprises a first-stage discharging conveyor 3-1 and a second-stage discharging conveyor 3-2; the secondary discharging conveyor 3-2 is communicated with the cracking carbon collecting bin 3-3;

as a preferred embodiment of the present invention, the pyrolysis gas recycling combustion apparatus 7 includes a burner, a pyrolysis gas conveying pipeline, a safety valve, a pressure control device, and the like;

as a preferred embodiment of the present invention, the flue gas treatment device comprises a spray tower, a fan, and a photo-oxidation catalytic tail gas treatment device;

the above embodiments are only used for illustration and not for limiting the technical solution of the present invention. Any modification or partial replacement without departing from the spirit of the present invention should be covered by the scope of the claims of the present invention.

Claims

1. A waste organic high molecular material low-temperature industrial continuous catalytic cracking device is characterized in that: comprises a dehydration drying device, a cracking device, a heat-conducting medium recovery device and a cracking carbon recovery device which are connected in sequence; a pyrolysis gas condensing device, a pyrolysis gas recycling and burning device, a flue gas circulating system and a flue gas processing device;

the cracking device comprises a first-stage cracking reactor, a second-stage cracking reactor and a third-stage cracking reactor which are connected in sequence; the three reactors of the cracking device are connected through high-temperature flue gas circulation pipelines of all stages of cracking reactors, the three reactors of the cracking device are connected with heat-supply fans of all stages of cracking reactors, the first-stage cracking reactor and the second-stage cracking reactor are provided with forced feeding conveyors, the forced feeding conveyors are arranged between the second-stage cracking reactor and the third-stage cracking reactor, and the three reactors of the cracking device are provided with tail gas discharge ports and feed ports.

2. The low-temperature industrial continuous catalytic cracking equipment for waste organic polymer materials according to claim 1, which is characterized in that: the cracking device comprises a first-stage cracking reactor, a second-stage cracking reactor and a third-stage cracking reactor which are connected in sequence; a feed inlet is arranged in the first-stage cracking reactor, and a discharge outlet is arranged in the third-stage cracking reactor;

the reactor of each stage is internally provided with two special-shaped spiral conveying structures to realize the conveying of materials from the inlet to the outlet of the reactor, the three reactors of the cracking device are connected through high-temperature flue gas circulation pipelines of the cracking reactors of each stage, the three reactors of the cracking device are connected with heat-sending fans of the cracking reactors of each stage, the forced conveying of the materials from the first-stage cracking reactor to the second-stage cracking reactor is realized between the first-stage cracking reactor and the second-stage cracking reactor through a spiral forced feeding conveyor, and the forced conveying of the materials from the second-stage cracking reactor to the third-stage cracking reactor is also realized between the second-stage cracking reactor and the third-stage cracking reactor through the spiral forced feeding conveyor;

the upper parts of all three reactors of the cracking device are provided with cracking gas outlets, and then connected with a cracking gas condensing device, so that the gases of the three cracking reactors can be independently recovered; a set of independent heat supply and flue gas circulating systems are arranged among the reactors of each stage, and the reactors are mutually independent; the flue gas of the cracking device is discharged after being treated by the flue gas treatment device;

the heat-conducting medium recovery device comprises an ash separator, the lower half part of a machine barrel of the ash separator is designed into a porous structure, and the diameter of a hole is smaller than that of a solid heat-conducting medium.

3. The low-temperature industrial continuous catalytic cracking equipment for waste organic polymer materials according to claim 1, which is characterized in that: the inlet end of the lifter is connected with the solid heat-conducting medium outlet end of the ash separator through a flange, the inlet end of the solid heat-conducting medium entering the lifter is driven by the lifting screw to climb upwards through rotation, the lifting screw is driven by the lifting motor, the solid heat-conducting medium is lifted to the inlet of the primary cracking reactor through the lifter, enters the primary cracking reactor together with waste plastics and waste rubber for cyclic utilization, and the rotating speed of the adjusting screw can adjust the supply speed of the solid heat-conducting medium.

4. The low-temperature industrial continuous catalytic cracking equipment for waste organic polymer materials according to claim 2, which is characterized in that: the lower part of the mixed material inlet is connected with an ash separator barrel, a funnel is arranged below the ash separator barrel, an ash outlet is arranged below the funnel, a separation screw is arranged in the ash separator barrel, the separation screw is arranged on the left side of the ash separator barrel and driven by a separator motor arranged on the left side, the left lower side of the ash separator barrel is connected with a connecting flange, the connecting flange is fixedly connected with a lifter barrel, a solid heat-conducting medium outlet is arranged at the bottom of the upper side of the lifter barrel, and a lifting screw is arranged in the lifter barrel and driven by a lifting motor on the upper portion.

5. The low-temperature industrial continuous catalytic cracking equipment for waste organic polymer materials according to claim 1, which is characterized in that: the dehydration drying device a is a primary single-screw dehydration extruder, and the dehydration drying device b is a secondary drying feeding extruder; the high-efficiency dehydration is realized through the special-shaped screw in the primary single-screw dehydration extruder, the drying and continuous feeding functions are realized through the secondary drying feeding extruder, and the two extruders are connected with each other;

the screw special for the secondary drying feeding extruder of the dehydration drying part realizes forced feeding, prevents air from entering a cracking furnace, and can realize sealing in the cracking feeding continuous process;

the discharge port of the first-stage single-screw dehydration extruder is vertically connected with the extrusion feed port of the second-stage drying feed extruder.

6. The low-temperature industrial continuous catalytic cracking equipment for waste organic polymer materials according to claim 1, which is characterized in that: the dehydration drying device comprises a dehydration extruder, a plasticizing extruder, a blower, a storage bin and a conveying pipe, wherein the dehydration extruder, the storage bin, the conveying pipe and the plasticizing extruder are sequentially connected;

a pin structure is arranged in the gap of the dehydration screw;

and an electromagnetic coil is arranged on the outer side of the machine barrel, a coil protective cover is arranged, and the machine barrel is heated in an electromagnetic induction mode.

7. The low-temperature industrial continuous catalytic cracking equipment for waste organic polymer materials according to claim 1, which is characterized in that:

the shape of the heat-conducting medium is a regular trihedron;

the heat-conducting medium is automatically reintroduced into the first-stage cracking reactor from the third-stage cracking reactor in the cracking process of the waste plastics and the waste tires, so that the internal circulation process of the heat-conducting medium is realized.

8. The low-temperature industrial continuous catalytic cracking equipment for waste organic polymer materials according to claim 1, which is characterized in that: the device comprises a heavy oil separator, a heavy oil storage tank, a heat exchanger, an oil final storage tank and a pyrolysis gas conveying pipe;

cracking gas conveying pipes of all stages of cracking reactors are respectively connected with respective heavy oil separators, heat exchangers are respectively connected with respective heavy oil separators, and the heat exchangers of cracking pipes are respectively connected with respective oil product collecting tanks.

9. The low-temperature industrial continuous catalytic cracking equipment for waste organic polymer materials according to any one of claims 1 to 8, characterized in that: the pyrolysis carbon recovery device comprises a multi-stage pyrolysis carbon recovery conveyor, namely a multi-stage discharging conveyor, wherein each group of conveyors comprises a motor, a conveying screw rod, a machine barrel, a cooling part and a sealing part, and finally the final stage of discharging conveyor conveys pyrolysis carbon into a pyrolysis carbon collection bin;

the pyrolysis gas recycling combustion device comprises a combustor, a pyrolysis gas conveying pipeline, a safety valve and a pressure control device;