CN217438095U - Realize schizolysis system of schizolysis high polymer - Google Patents

Abstract

The utility model relates to a realize schizolysis system of schizolysis high polymer, including pretreatment unit and schizolysis unit, pretreatment unit includes compression feed arrangement, first extrusion device, second extrusion device, and compression feed arrangement's discharge gate is linked together with first extrusion device's feed inlet, and first extrusion device's discharge gate is connected with second extrusion device's feed inlet, and the schizolysis unit includes the diaphragm type schizolysis reaction chamber three or more than three, and the discharge gate of second extrusion device is linked together with the diaphragm type schizolysis reaction chamber three or more than three in the schizolysis unit. The first extrusion device and the second extrusion device are both provided with a first heating element. Adopt the utility model discloses a realize schizolysis system of schizolysis high polymer, the pyrolysis time is short, and the reaction is complete, is difficult for the carbon deposition, can innocent treatment chlorine-containing polymer, and the range of application is wide.

Description

Realize schizolysis system of schizolysis high polymer

Technical Field

The utility model relates to a waste treatment technical field specifically indicates a pyrolysis system of realization schizolysis high polymer.

Background

At present, cracking reactors for cracking high polymers at home and abroad mainly comprise a shell and tube type cracking reactor, a fluidized bed cracking reactor, a groove type rotary cracking reactor and a centrifugal scraper film-forming thermal cracking device. These cracking reactors suffer from the following disadvantages:

by adopting the vertical tube type cracking reactor, the carbon formation of the tube type cracking reactor is easily caused in the cracking process of petroleum or high polymer, the cracking is incomplete, and even the cracking reaction is difficult to carry out.

The fluidized bed cracking reactor is used for cracking waste plastics, the effect is poor, high-viscosity oily or wax-like substances are generated in the process of the plastics, the fluidity of a heating carrier is poor, the cracking effect is influenced, and new heating carriers are required to be supplemented continuously.

The waste plastics are cracked by using a groove type rotary cracking reactor in China, so that the reaction period is long, the reaction is incomplete, the equipment is carbonized, the end product is a viscous coking object which is difficult to treat, the secondary pollution is serious, and the occupied area of the equipment is large.

The prior ideal waste plastic cracking equipment is a centrifugal scraper film-forming thermal cracking device, has the advantages of high reaction speed, difficult carbonization, 100 percent effective conversion and no secondary pollution, overcomes the defects of the prior cracking reactors, but has small treatment capacity of only 50-60 kg/h.

The cracking reactors are not suitable for cracking polyvinyl chloride (PVC), and hydrogen chloride (HCl) gas is generated in the thermal cracking process to corrode equipment and pollute the environment.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming of above-mentioned prior art, providing a pyrolysis system of realization schizolysis high polymer that pyrolysis time is short, the reaction is complete, be difficult for the knot carbon, no secondary pollution, can be a large amount of innocent treatment chlorine polymer, equipment area is little.

In order to achieve the above object, the cracking system for cracking high polymer of the present invention comprises:

the cracking system for realizing cracking of the high polymer is mainly characterized by comprising a pretreatment unit and a cracking unit, wherein the pretreatment unit comprises a compression type feeding device, a first extrusion device and a second extrusion device, a discharge hole of the compression type feeding device is communicated with a feed hole of the first extrusion device, a discharge hole of the first extrusion device is connected with a feed hole of the second extrusion device, the cracking unit comprises three or more film type cracking reaction cavities, and a discharge hole of the second extrusion device is communicated with three or more film type cracking reaction cavities in the cracking unit. The first extrusion device and the second extrusion device are both provided with a first heating element.

Preferably, the discharge port of the first extrusion device is connected with the feed port of the second extrusion device through a connecting device, the connecting device is provided with a cylindrical upper part and a conical lower part, the top end of the cylindrical upper part is provided with an exhaust port, the cylindrical upper part is provided with a first connecting port, the first connecting port is slidably and hermetically connected with the discharge port of the first extrusion device, the bottom end of the conical lower part is provided with a second connecting port, the second connecting port is communicated with the feed port of the second extrusion device, and the first extrusion device and/or the second extrusion device is/are provided with an exhaust port for exhausting waste gas generated by heating. The conical lower part of the connecting device is provided with a third heating element for heating the flowing pasty high polymer.

Preferably, the first extrusion device comprises a first speed reducer, a first coupler, a first bearing box and a first screw cylinder, the first speed reducer, the first coupler, the first bearing box, a feed inlet of the first extrusion device, the first screw cylinder and a discharge outlet of the first extrusion device are sequentially connected, the second extrusion device comprises a second speed reducer, a second coupler, a second bearing box and a second screw cylinder, the second speed reducer, the second coupler, the second bearing box, a feed inlet of the second extrusion device, the second screw cylinder and a discharge outlet of the second extrusion device are sequentially connected, a first screw rod and a second screw rod which are connected with the first bearing box and the second bearing box are respectively arranged in the first screw cylinder and the second screw cylinder, and exhaust holes are respectively arranged in the first screw cylinder and the second screw cylinder.

Preferably, the compression type feeding device comprises a cylindrical upper barrel and a cylindrical lower barrel, the diameter of the cylindrical upper barrel is larger than that of the cylindrical lower barrel, the compression type feeding device is provided with a stirring structure, the stirring structure comprises a stirring shaft and combined blades, and the combined blades comprise rectangular blades corresponding to the cylindrical upper barrel and spiral blades corresponding to the cylindrical lower barrel.

Preferably, the discharge port of the second extrusion device is communicated with three or more than three membrane type cracking reaction cavities in the cracking unit through a flow dividing head. The flow dividing head comprises a connecting bent pipe and a shell, one end of the connecting bent pipe is communicated with a discharge hole of the second extrusion device, the other end of the connecting bent pipe is connected with an inlet end part of the shell of the flow dividing head, a porous circular plate is arranged at an inlet end part of the shell, a conical core and a partition plate arranged around the conical core are arranged in the shell, the partition plate divides the inner space of the shell into compartments corresponding to the number of the membrane type cracking reaction cavities, and a discharge hole corresponding to the number of the membrane type cracking reaction cavities is arranged at an outlet end part of the shell; the housing is provided with a second heating element.

Preferably, the cracking unit further comprises an oil gas collecting device, the number of the oil gas collecting device corresponds to the number of the membrane type cracking reaction chambers, the oil gas collecting device further comprises a first oil gas conveying branch pipe connected with the membrane type cracking reaction chambers, a catalytic adsorption tower connected with an air outlet of the first oil gas conveying branch pipe, a second oil gas conveying branch pipe connected with the catalytic adsorption tower, a first condenser connected with an outlet of the second oil gas conveying branch pipe, a third oil gas conveying branch pipe connected with the first condenser, and a receiving tank connected with an outlet of the third oil gas conveying branch pipe, the air outlet of the membrane type cracking reaction chambers is communicated with the bottom of the catalytic adsorption air inlet through the first oil gas conveying branch pipe, the air outlet of the catalytic adsorption tower is communicated with an air inlet at the top of the first condenser through the second oil gas conveying branch pipe, and a gas-liquid outlet at the top of the first condenser is communicated with a gas-liquid inlet at the side surface of the receiving tank through a third gas-oil conveying branch pipe, a gas outlet at the top of the receiving tank is communicated with the combustion main pipe, and a condensate outlet at the bottom of the first condenser is communicated with the condensate main pipe.

Preferably, the dewaxing furnace comprises a dewaxing furnace barrel, a fourth speed reducer and a scraper, wherein the scraper is stirred and comprises a main shaft, a scraper frame, a scraper, a bottom shaft and a high-temperature sliding bearing, the scraper frame is fixed on the main shaft, the scraper is suspended on the scraper frame, and the bottom scraper is arranged at the bottom of the scraper frame.

Preferably, the catalytic adsorption tower comprises an upper end cover, a first middle section, a second middle section, a lower end cover, an upper grid and a lower grid, wherein the upper end cover, the first middle section, the second middle section and the lower end cover are sequentially connected into a tower body from top to bottom, and the upper grid and the lower grid are sequentially fixed in the tower body from top to bottom.

Preferably, the membrane type cracking reaction chamber comprises a reaction chamber cylinder, a third speed reducer and a stirring device with scales, wherein the stirring device with scales comprises a stirring shaft, a distribution plate, a lantern frame and movable scales, the lantern frame is fixed on the stirring shaft, the movable scales are fixed on the lantern frame, and the movable scales can freely rotate; the reaction cavity barrel is provided with a fourth heating element to form a first temperature zone reaction cavity barrel, a second temperature zone reaction cavity barrel and a third temperature zone reaction cavity barrel from top to bottom respectively.

Preferably, the cracking unit further comprises a dewaxing furnace, a fifth oil gas conveying branch pipe connected with the dewaxing furnace, a catalytic flash tower connected with an outlet of the fifth oil gas conveying branch pipe, a sixth oil gas conveying branch pipe connected with the catalytic flash tower, a second condenser connected with an outlet of the sixth oil gas conveying branch pipe, a gas-liquid separation tank connected with a lower outlet of the second condenser, a seventh liquid conveying branch pipe connected with a discharge port at the bottom of the gas-liquid separation tank, an eighth gas conveying branch pipe connected with a side gas outlet of the gas-liquid separation tank, and a telescopic pipe, wherein a feed port of the dewaxing furnace is communicated with a discharge port of the membrane type cracking reaction chamber through the telescopic pipe, a gas outlet of the dewaxing furnace is communicated with an inlet of the catalytic flash tower through the fifth oil gas conveying branch pipe, the gas outlet of the catalytic flash tower is communicated with the inlet of the second condenser through the sixth oil gas conveying branch pipe, the outlet at the bottom of the second condenser is directly communicated with the gas inlet at the upper part of the gas-liquid separation tank, and the gas outlet at the side surface of the gas-liquid separation tank is communicated with the exhaust main pipe through the eighth gas conveying branch pipe; the dewaxing furnace is provided with a fourth inductive heating element, and the catalytic flash tower is provided with a sixth heating element.

Preferably, the bin outlet of dewaxing stove bottom be connected with carbon black cooler's feed inlet, carbon black cooler discharge gate be connected with the carbon black collecting box, the upper portion of carbon black collecting box be provided with the nitrogen gas import, the carbon black cooler include fourth speed reducer, third shaft coupling, third bearing box, third barrel to be connected gradually, fix at the base through the support, be equipped with the screw rod that links to each other with the third shaft coupling in the third barrel, third barrel outer wall is provided with coolant tank.

Preferably, the catalytic flash tower comprises an upper shell end, a first middle shell section, a second middle shell section, a lower shell end, a first grid, a second grid, a first umbrella cover and a second umbrella cover, wherein the upper shell end, the first middle shell end, the second middle shell end and the lower shell end are sequentially connected from top to bottom to form a tower body, a sixth heating element is arranged at the lower end of the catalytic flash tower, and the first grid, the second grid, the first umbrella cover and the second umbrella cover are sequentially fixed in the tower body from top to bottom.

Preferably, the compression-type feeding device, the first extrusion device, the second extrusion device are mounted on a platform higher than the membrane cracking reaction chamber, and the receiving tank, the first condenser, the catalytic adsorption tower, the membrane cracking reaction chamber, the second condenser, the catalytic flash tower, the gas-liquid separation tank, the dewaxing furnace, and the carbon black cooler are sequentially assembled on the same skid block support from top to bottom.

The utility model discloses a realize schizolysis system of schizolysis high polymer, strong adaptability can not only handle waste plastics (PE, PP, PS), can also handle polymers such as waste engine oil, residual oil, but also can handle chloric polyvinyl chloride, and it is big to have a throughput, and reaction rate is fast, and effective conversion rate is close 100%, and equipment section of thick bamboo wall does not become carbon, and no secondary pollution adapts to advantages such as continuous production throughout the year. The scale can reach 8-30 tons/day, and the defects of long reaction period, low oiling rate, solid waste and wastewater discharge, serious carbon deposition and secondary pollution caused by difficult cleaning of the existing domestic and foreign waste plastic treatment equipment are overcome. Adopt the utility model discloses a realize schizolysis system of schizolysis high polymer, the schizolysis time is short, and the reaction is complete, is difficult for the carbon, and no secondary pollution can innocent treatment chlorine-containing polymer, and area is little, and the range of application is wide.

Drawings

Fig. 1 is a structural sectional view of a first embodiment of the pyrolysis system for cracking high polymer according to the present invention.

Fig. 2 is a top view of a first embodiment of the cracking system for cracking high polymer according to the present invention.

Figure 3 is the utility model discloses a realize the structural section view of the compression feeder hopper in the schizolysis system of schizolysis high polymer.

Fig. 4 is a sectional view of the first extruding device in the cracking system for cracking high polymer according to the present invention.

Fig. 5 is a sectional view of the second extruding device in the cracking system for cracking high polymer according to the present invention.

Fig. 6 is a sectional view of the scraper assembly in the cracking system for cracking high polymer according to the present invention.

Fig. 7 is a partially enlarged sectional view of C-C of fig. 6.

Fig. 8 is a sectional view of the first flow-dividing head of the cracking system for cracking high polymer according to the present invention.

Fig. 9 is a partially enlarged sectional view of E-E of fig. 8.

Fig. 10 is a sectional view showing the structure of the stirring assembly in the pyrolysis system for cracking high polymer according to the present invention.

Fig. 11 is an enlarged partial cross-sectional view taken along line D-D of fig. 10.

FIG. 12 is a sectional view showing the structure of a carbon black cooler in a cracking system for cracking high polymer according to the present invention.

Fig. 13 is a sectional view showing the structure of the connecting device in the cracking system for cracking high polymer according to the present invention.

Fig. 14 is a top view of a second embodiment of the cracking system for cracking high polymer according to the present invention.

Fig. 15 is a cross-sectional view of a second flow-dividing head of the cracking system for cracking high polymer according to the present invention.

Fig. 16 is a cross-sectional view of a receiving tank in a cracking system for implementing cracking of high polymer according to the present invention.

FIG. 17 is a sectional view of a carbon black collecting box of the cracking system for cracking high polymer according to the present invention.

Fig. 18 is a cross-sectional view of a catalytic absorption flash tower in a cracking system for cracking high polymer according to the present invention.

Fig. 19 is a sectional view of a catalytic tower in a cracking system for cracking high polymer according to the present invention.

Reference numerals:

1. 2, 10 first condenser

3 receiving tank

4. 11, 12 catalytic adsorption tower

5a, 5b, 5c stirring

6 second condenser

7 gas-liquid separation tank

8 catalytic flash tower

9 sixth heating element

13 first shunt head

14a, 14b, 14c membrane type cracking reaction cavity

15 compression type feeding device

16 first extrusion device

17 connecting device

18 second extrusion device

19 oil storage tank

20 dewaxing furnace

21 combination valve

22 carbon black cooler

23. 24, 25 pneumatic combination valve

26 carbon powder collecting box

27 scraper stirring

28 oil storage tank

29 gas compressor

30 liquefied gas storage tank

a first speed reducer

b first coupling

c first bearing housing

d feed inlet of first extrusion device

e first screw

f exhaust port of first extrusion device

g first screw barrel

h. r first heating element

Discharge port of i first extrusion device

j first fixing frame

k first base

l second speed reducer

m second coupling

n second bearing box

o feed inlet of second extrusion device

p second screw

q second screw tube

s second extrusion device's discharge gate

t second fixing frame

x second base

Lambda, eta, alpha fourth heating element

d1 connecting elbow

d2 porous circular plate

d3 cover plate

d4 baffle

d5 second heating element

d6 conical core

d7 casing

d8 discharge opening of first dividing head

Feed inlet of h1 carbon black cooler

Discharge port of h2 carbon black cooling machine

b1 film type cracking reaction cavity cylinder

b2 dewaxing furnace cylinder

t3 third heating element

t4 fourth heating element

t5 fifth heating element

A support

B fourth shaft coupling

C bearing box

D stirring shaft

E cylindrical upper barrel

F rectangular blade

H fifth speed reducer

J-shaped cylindrical lower barrel

K helical blade

S spindle

T distribution plate

U lantern frame

V movable scale

W bottom shaft

X discharging bottom scraper

Y high-temperature sliding bearing

B1 cylindrical upper vent

B2 connecting device's barrel

B3 first connecting port

B4 second connection port

C1 Upper end of Shell

C2 first grid

C3 first middle shell section

C4 second middle shell section

C5 second grid

C6 first umbrella shape cover

C7 second umbrella shape cover

Lower end of shell of C8 catalytic flash tower

F1 upper end cover

F2 upper grid

F3 first middle section

F4 second middle section

F5 lower grid

F6 lower end cover

H1 fourth speed reducer

H2 third coupling device

H3 third bearing box

H4 third screw tube

H5 support

H6 cooling water tank

H7 base

H9 screw

J1 third speed reducer

L1 Main shaft

L2 doctor blade holder

L3 scraper

L4 discharge bottom scraper

L5 bottom shaft

L6 high-temperature sliding bearing

N1 Top vent for receiver tank

N2, N3 and N4 oil gas inlets

N5, N6 receiving tank outlet

S4 baffle

S5 conical core

S7 casing

T1 box cover

Feed inlet of T2 carbon black collecting box

T3 Box body

T4 trolley

T5 Nitrogen inlet

Z1 discharge branch pipe

Z2 first oil and gas delivery branch pipe

Z3 second branch oil and gas conveying pipe

Z4 third oil gas delivery branch pipe

Z5 fourth oil and gas delivery branch pipe

Z6 fifth oil and gas delivery branch pipe

Z7 liquid seal pipe

Z8 exhaust branch pipe

Z9 bottom telescopic pipe

Z10 gas main

Detailed Description

In order to more clearly describe the technical content of the present invention, the following further description is given with reference to specific embodiments.

As shown in fig. 1, fig. 2 and fig. 13, for the present invention, a specific embodiment of a cracking system for cracking high polymer is provided, which includes a cracking unit for cracking reaction and a pretreatment unit for treating high polymer before cracking reaction, the pretreatment unit includes a compression type feeding device 15, a first extrusion device 16, a second extrusion device 18 and a first splitter 13, a discharge port of the compression type feeding device 15 is communicated with a feed port of the first extrusion device 16, a discharge port of the first extrusion device 16 is communicated with a middle feed port of the connection device 17, a bottom discharge port of the connection device 17 is communicated with a feed port of the second extrusion device 18, a discharge port of the second extrusion device 18 is communicated with a feed port of the first splitter 13, an outlet of the first splitter 13 is communicated with the cracking unit, the first extrusion device 16 and the second extrusion device 18 are both provided with first heating elements h and r, and the first extrusion device 16 is provided with an exhaust port f for exhausting waste gas generated by heating. Wherein the first heating elements h, r may be three groups of heating elements, such as induction heating coils.

In a preferred embodiment, the discharge outlet i of the first extruding device 16 is connected with the feed inlet o of the second extruding device 18 through a connecting device 17, as shown in fig. 13, a cylinder B2 of the connecting device 17 is provided with a cylindrical upper part and a conical lower part, the top end of the cylindrical upper part is provided with an exhaust port B1, the cylindrical upper part is provided with a first connecting port B3, the first connecting port B3 is slidably and hermetically connected with the discharge outlet i of the first extruding device 16, the bottom end of the conical lower part is provided with a second connecting port B4, and the second connecting port B4 is communicated with the feed inlet o of the second extruding device 18.

Wherein the outer wall of the connecting device 17 is wound with a third heating element such as an induction coil, and the first connecting port B3 has a stuffing box connected to the discharge port i of the first extruding device 16. The top end of the cylindrical upper part of the connecting device 17 is provided with an exhaust port B1 connected with the air inlet of the hydrogen chloride processing device, and a third heating element t3 arranged on the outer wall of the connecting device 17 ensures that the connecting device maintains the dechlorination temperature of the polyvinyl chloride of 260 ℃, and hydrogen chloride is continuously extracted from an exhaust port B1. The waste high polymer in a molten state from which hydrogen chloride is removed in the connecting device 17 enters the second extruding device 18 from the second connecting port B4 at the bottom of the connecting device 17.

In a preferred embodiment, as shown in fig. 4, the first extrusion device 16 includes a first speed reducer a, a first coupling b, a first bearing box c, a feeding port d of the first extrusion device 16, a first screw tube g, and a discharging port i of the first extrusion device 16, which are connected in sequence, and a first screw e connected with the first bearing box c is disposed in the first screw tube g. As shown in fig. 5, the second extrusion device 18 includes a second speed reducer l, a second coupling m, a second bearing box n, a feed inlet o of the second extrusion device 18, a second screw tube q, and a discharge outlet s of the second extrusion device 18, which are connected in sequence, and a second screw p connected with the second bearing box n is disposed in the second screw tube q.

In a preferred embodiment, as shown in fig. 4, the first screw barrel g of the first extrusion device 16 is provided with a vent hole f in the middle, and the vent hole f is internally provided with a vent element.

As shown in fig. 4 and 5, the first extruding device 16 is further provided with a first fixing frame j and a first base k, and the second extruding device 18 is further provided with a second fixing frame t and a second base x.

The first screw cylinder g of the first extrusion device 16 can slide freely in the first connecting port B3 of the connecting device and is airtight, the thrust generated by the first extrusion device 16 due to thermal expansion is eliminated, the heating element h outside the first screw cylinder g is used for heating the waste plastic fragments in the first extrusion device 16, when the first screw rod e of the first extrusion device 16 rotates, the waste plastic fragments move forwards, are heated, melted and heated in the moving process, and the water vapor and air generated in the heating process are discharged from the exhaust element in the exhaust hole in the middle of the first screw cylinder g and enter the absorption unit for treatment. When chlorine-containing plastic chips in the molten and heated waste plastics are heated to a dechlorination temperature of 180-260 ℃, the molten polyvinyl chloride is subjected to chloride ion removal to generate hydrogen chloride, and the hydrogen chloride is discharged into a hydrogen chloride absorption treatment system through the connecting device 17. When the second screw p rotates, the molten waste plastic continues to move forward while being heated by the first heating element r outside the second barrel q to a feeding temperature of 360 ℃.

In a preferred embodiment, as shown in fig. 3, the compression-type feeding device 15 comprises a cylindrical upper cylinder E and a cylindrical lower cylinder J, the diameter of the cylindrical upper cylinder E is larger than that of the cylindrical lower cylinder J, the compression-type feeding device is provided with a stirring structure, the stirring structure comprises a stirring shaft D and combined blades, and the combined blades comprise a rectangular blade F corresponding to the cylindrical upper cylinder and a spiral blade K corresponding to the cylindrical lower cylinder.

As shown in fig. 3, in the compression-type feeding device 15, a fifth speed reducer H, a fourth coupling B, a bearing box C, and a bracket a are connected to a stirring shaft D in this order. When the stirring shaft D rotates, under the action of the rectangular blades F, the materials move towards the center of the compression type feeding device 15, and the materials moved to the center are pressed into the feeding hole D of the first extruding device 16 by the rotating spiral blades K.

In a preferred embodiment, as shown in fig. 1 and 14, the cracking unit comprises three or more than three membrane cracking reaction chambers, and the discharge port s of the second extrusion device 18 is communicated with three membrane cracking reaction chambers 14a, 14b, 14c or more than three membrane cracking reaction chambers in the cracking unit through a first flow dividing head 13. As shown in fig. 1 and 2, in the present embodiment, the case where the cracking unit includes three membrane type cracking reaction chambers 14a, 14b, 14c is shown, and as shown in fig. 14, for the second embodiment of the present invention, the case where the cracking unit includes four membrane type cracking reaction chambers is shown.

In a preferred embodiment, as shown in fig. 8, the first flow-dividing head 13 comprises a connecting elbow d1 and a housing d7, one end of the connecting elbow d1 is communicated with the discharge hole of the second extrusion device 18, the other end of the connecting elbow d1 is connected with the inlet end of the housing d7 of the first flow-dividing head, the inlet end of the housing d7 is provided with a porous circular plate d2, the interior of the housing is provided with a conical core d6 and a partition d4 arranged around the conical core d6, the partition d4 is used for dividing the interior space of the housing d7 into compartments corresponding to the number of the membrane cracking reaction chambers, and the outlet end of the housing d7 is provided with a discharge hole d8 corresponding to the number of the membrane cracking reaction chambers; the housing is provided with a second heating element d 5.

As shown in fig. 9 and 15, the partition plates divide the inner space of the shell into three and four compartments, corresponding to three and four membrane type cracking reaction chambers, respectively. Other numbers of membrane cracking reaction chambers and compartments, discharge ports may be provided depending on the actual throughput and other needs. As shown in fig. 15, the case S7 is provided with a conical core S6 inside and partitions S4 around the conical core, the partitions S4 dividing the space inside the case S7 into four compartments.

As shown in fig. 8, the first flow dividing head 13 is further provided with a cover plate d3, the discharge ports d8 are respectively connected with a discharge branch pipe Z1, the other end of the discharge branch pipe Z1 is respectively connected with the feed ports of the film type cracking reaction chambers 14a, 14b, 14c, the first flow dividing head 13 changes the material from spiral motion to linear motion by a porous circular plate d2, and the material is divided by a partition plate d4 and a conical core d6 and then is respectively pressed into the feed ports of the corresponding film type cracking reaction chambers 14a, 14b, 14c by three discharge ports d8 and three discharge branch pipes Z1.

In a preferred embodiment, as shown in fig. 1, the membrane cracking reaction chambers 14a, 14b, 14c include a barrel b1 of the membrane cracking reaction chamber, and the barrel b1 of the membrane cracking reaction chamber is heated by a fourth heating element t2 arranged on the barrel wall into three regions with different temperatures, namely, low temperature, medium temperature and high temperature, which are distributed from top to bottom. For example, three groups of high-frequency induction heating coils lambda, eta and alpha are respectively wound outside the barrel b1 of the membrane type cracking reaction cavity, the barrel is divided into a high temperature zone, a middle temperature zone and a low temperature zone from top to bottom, the upper temperature zone is 350-380 ℃, the middle temperature zone is 400-450 ℃, and the lower temperature zone is 450-500 ℃, so that different waste plastics are cracked in different temperature zones, and the phenomenon that the cracking temperature is too high or too low to generate carbon black at the bottom is avoided.

As shown in fig. 1, fig. 2, fig. 6, and fig. 7, the membrane type cracking reaction chambers 14a, 14b, and 14c are provided with stirrers 5a, 5b, and 5c driven by a third speed reducer J1, as shown in fig. 6, the stirrers 5a, 5b, and 5c are composed of a main shaft S, a distribution plate T, a lantern frame U, a movable scale V, a discharge bottom scraper X, a bottom shaft W, and a high temperature sliding bearing Y, the distribution plate T, the lantern frame U, the discharge bottom scraper X, the bottom shaft W, and the high temperature sliding bearing Y are fixedly connected to the main shaft S from top to bottom, as shown in fig. 6, the movable scale V is connected to the lantern frame U in a suspension manner, the bottom of the membrane type cracking reaction chambers 14a, 14b, and 14c are provided with pneumatic combination valves 23, 24, and 25, a bottom extension tube Z9, the membrane type cracking reaction chambers 14a, 14b, and 14c, and the top is provided with a third speed reducer J1 driving the stirrers 5a, 5b, and 5c, the bottom material outlet is provided with pneumatic combination valves 23, 24 and 25 which are connected with a bottom extension tube Z9, and the other end of the bottom extension tube Z9 is connected with a feed inlet at the top of the dewaxing furnace 20.

The hot melted pasty waste plastics discharged from the discharge port d8 of the first splitter head 13 are pressed into the rotary distribution tray T in the membrane cracking reaction chambers 14a, 14b, 14c through the discharge branch pipe Z1, and are thrown to the high-temperature cylinder walls of the membrane cracking reaction chambers 14a, 14b, 14c under the action of centrifugal force, under the combined action of gravity and the rotary movable scale V, the hot melted pasty waste plastics on the cylinder walls are scraped into a membrane shape and move downwards, during the downward movement process, the hot melted pasty waste plastics instantaneously undergo a thermal cracking reaction on the cylinder walls with different temperatures, the discharge bottom scraper X can scrape high-boiling substances at the bottom to the cylinder walls to be reheated, and the generated oil gas steam is discharged from the membrane cracking reaction chambers 14a, 14b, 14c, enters the catalytic adsorption towers 4, 11, 12 to be further cracked and remove organic chlorine.

In a preferred embodiment, as shown in fig. 1 and 19, the cracking unit comprises a catalytic adsorption tower 4, 11, 12, which is composed of an upper end cover F1, a first middle section F3, a second middle section F4, a lower end cover F6, an upper grid F2 and a lower grid F5. The upper end cover F1, the first middle section F3, the second middle section F4 and the lower end cover F6 are sequentially connected from top to bottom to form a tower body, the upper grid F2 and the lower grid F5 are sequentially fixed in the tower body from top to bottom, the upper grid of the catalytic adsorption tower is provided with an adsorbent, the lower grid is provided with a catalyst, and the cracking reaction and the organic chlorine removal are completed in the same tower.

In a preferred embodiment, as shown in fig. 1, the cracking unit comprises a dewaxing furnace 20, three inlets of the dewaxing furnace 20 are respectively communicated with outlets of pneumatic combination valves 23, 24 and 25 corresponding to the bottoms of the three membrane type cracking reaction chambers 14a, 14b and 14c through three bottom extension tubes Z9, and the dewaxing furnace 20 is provided with a fifth heating element such as an induction heating coil.

As shown in fig. 1, 10 and 11, the dewaxing furnace 20 comprises a cylinder b2, a scraper stirrer 27, a high-temperature sliding bearing L6 and a combination valve 21, as shown in fig. 10 and 11, the scraper stirrer 27 comprises a main shaft L1, a scraper holder L2, a scraper L3, a bottom scraper L4, a bottom shaft L5 and a high-temperature sliding bearing L6, the main shaft L1 is fixedly connected with the scraper holder L2, the bottom scraper L4 and the bottom shaft L5 from top to bottom, the scraper L3 is suspended on the scraper holder L2, and the bottom scraper is mounted at the bottom of the scraper holder L2.

Carbon black powder from the material outlet at the bottom of the membrane type cracking reaction chambers 14a, 14b and 14c falls into the dewaxing furnace 20 from the feed inlet at the top of the dewaxing furnace 20 by gravity through the combination valve 21 and the bottom bellows Z9, under the rotation action of a scraper stirring device 27, high boiling point substances in carbon black powder are steamed out by heating to obtain dry and loose carbon black products, high boiling point steam steamed out by a dewaxing furnace 20 enters a catalytic flash tower 8 for catalytic cracking, generated oil gas enters a second condenser 6 from an oil gas inlet at the upper part of the second condenser through a fifth oil gas conveying branch pipe Z6, condensed oil gas is discharged from the bottom of the second condenser 6 and enters a gas-liquid separation tank 7, uncondensed fuel gas is discharged from the top of the gas-liquid separation tank 7, the condensate flows into the oil storage tank 19 from the bottom of the gas-liquid separation tank 7 through the seventh gas conveying branch pipe and the gas main pipe Z10.

In a preferred embodiment, as shown in fig. 18, the catalytic flash tower 8 comprises an upper shell, a first middle shell section, a second middle shell section, a lower shell end, a first grid, a second grid, a first umbrella-shaped hood C6, and a second umbrella-shaped hood C7, wherein the upper shell, the first middle shell section, the second middle shell section, and the lower shell end are sequentially connected from top to bottom to form a tower, and the lower shell end is provided with a sixth heating element 9. The first grid, the second grid, the first umbrella-shaped cover and the second umbrella-shaped cover are sequentially fixed in the tower body from top to bottom.

Reflux in the catalytic flash tower 8 sequentially falls onto a first umbrella-shaped cover C6 and a second umbrella-shaped cover C7, the reflux falling onto a second umbrella-shaped cover C7 is scattered on a high-temperature shell wall at the lower end C8 of a shell of the catalytic flash tower 8 under the action of gravity to be instantaneously evaporated, and evaporated oil gas rises to enter a catalyst layer to be cracked again.

In a preferred embodiment, as shown in fig. 1 and 12, the discharge port at the bottom of the dewaxing furnace 20 is connected to the feed port h1 of the carbon black cooler 22, the discharge port h2 of the carbon black cooler 22 is connected to the carbon powder collecting box 26, and the upper part of the carbon powder collecting box 26 is provided with a nitrogen inlet T5 for filling nitrogen into the box T3 to prevent the carbon black from self-igniting at high temperature.

As shown in fig. 12 and 17, the carbon black cooler 22 is composed of a fourth speed reducer H1, a third coupling H2, a third bearing box H3, a feed inlet H1, a third screw H4, a support H5, a cooling water tank H6, a base H7, a screw H9, and a discharge outlet H2, wherein a water inlet is arranged at the lower part of the cooling water tank, and a water outlet is arranged at the upper part of the cooling water tank. The carbon black collecting box 26 consists of a box cover T1, a feeding port T2, a box body T3 and a trolley T4.

In a preferred embodiment, as shown in fig. 1 and 16, the cracking unit comprises three oil and gas collecting devices corresponding to the number of the three membrane cracking reaction chambers 14a, 14b and 14c, wherein the oil and gas collecting devices comprise three first oil and gas conveying branch pipes Z2 connected with the membrane cracking reaction chambers, three catalytic adsorption towers 4, 11 and 12 connected with gas outlets of the three first oil and gas conveying branch pipes Z2, three second oil and gas conveying branch pipes Z3 connected with oil and gas outlets at the top of the catalytic adsorption towers, first condensers 1, 2 and 10 connected with outlets of the three second oil and gas conveying branch pipes Z3, three third oil and gas conveying branch pipes Z4 connected with the bottoms of the three first condensers 1, 2 and 10, a receiving tank 3 connected with the three third oil and gas conveying branch pipes Z4, And the fuel gas main pipe Z10 is connected with the top of the receiving tank 3.

The receiving tank 3 is provided with oil gas inlets N2, N3, N4 and outlets N5 and N6, three oil gas inlets of the receiving tank 3 are respectively communicated with oil gas outlets at the bottoms of the three first condensers 1, 2 and 10 through three third oil gas conveying branch pipes Z4, oil gas inlets at the tops of the three first condensers are communicated with the oil gas outlets at the tops of the three catalytic adsorption towers 4, 11 and 12 through three second oil gas conveying branch pipes Z3, and oil gas inlets at the bottoms of the three catalytic adsorption towers 4, 11 and 12 are communicated with three oil gas outlets of the membrane type cracking reaction cavity through three first oil gas conveying branch pipes Z2. The top exhaust port N1 of the receiving tank 3 is connected with a gas main Z10.

In a preferred embodiment, the compression-type feeding device 15, the first extruding device 16, the second extruding device 18 are installed on a platform higher than the membrane cracking reaction chambers 14a, 14b, 14c, the receiving tank 3, the first condensers 1, 2, 10, the catalytic adsorption towers 4, 11, 12, the membrane cracking reaction chambers 14a, 14b, 14c, the second condenser 6, the catalytic flash tower 8, the gas-liquid separation tank 7, the dewaxing furnace 20, and the carbon black cooler 22 are sequentially assembled on the same skid support from top to bottom.

The utility model provides an application of the schizolysis system of realization schizolysis high polymer of use specifically includes:

1) preheating equipment: firstly, respectively starting the inductive heaters of all the membrane type cracking reaction chambers, respectively heating the cylinder walls of all the membrane type cracking reaction chambers simultaneously, and gradually increasing the temperature on the cylinder walls from top to bottom, wherein the initial temperature of the upper part is 360-400 ℃, and the temperature is increased to 450-500 ℃ along with the temperature of the cylinder walls. When the internal temperature of each film type cracking reaction cavity reaches 160-200 ℃, immediately starting the inductive heaters of the first extrusion device 16 and the second extrusion device 18 at the same time, respectively heating the first screw cylinder g of the first extrusion device 16 and the second screw cylinder q of the second extrusion device 18, so that the temperature of the first screw cylinder g of the first extrusion device 16 gradually rises from the feed port d of the first extrusion device to the discharge port i of the first extrusion device 16, gradually rises from 150-160 ℃ to 250-260 ℃, and the temperature of the second screw cylinder q of the second extrusion device 18 gradually rises from the feed port o of the second extrusion device to the discharge port s of the second extrusion device 18;

2) then, a fifth speed reducer H of the compression type feeding device 15 is started to drive a stirring shaft D and a rectangular blade F and a helical blade K which are fixed on the stirring shaft D; respectively starting a third speed reducer J1 at the top of each membrane type cracking reaction cavity 14a, 14b and 14c to drive stirring 5a, 5b and 5c, so that the movable scales V rotate in each membrane type cracking reaction cavity at the rotating speed of 5-40 r/min; then, the first reducer a of the first extrusion device 16 and the second reducer l of the second extrusion device 18 are started again to rotate the screw in the screw cylinder.

3) Waste plastics are charged into a compression type charging device 15, the waste plastics in the compression type charging device 15 are pressed into a charging port D of a first extrusion device 16 under the action of rotation of a stirring shaft D and a rectangular blade F and a helical blade K which are fixed on the stirring shaft D, the waste plastics move forward in a first screw barrel g at a certain speed under the action of rotational friction force and are continuously heated while moving forward, water vapor generated in the heating process and air brought in the charging process are discharged from an exhaust port provided in the first extrusion device 16 to be treated by an absorption device, when the molten waste plastics are discharged from a discharging port i of the first extrusion device 16 and enter a first connecting port B3 of a connecting device 17, paste of the waste plastics in a hot-melting state is heated to 250-260 ℃ and is continuously heated by a third heating element t3 in the connecting device 17, at this time, hydrogen chloride of chlorine-containing PVC mixed in the waste plastics is decomposed, the generated hydrogen chloride is discharged from an exhaust hole at the top of the connecting device 17 and pumped to a hydrogen chloride absorption treatment device, the melt without hydrogen chloride is discharged from an outlet at the lower part of the connecting device 17, enters the second extrusion device 18 from a feed inlet o of the second extrusion device 18, under the rotation action of the second screw p, the paste in a hot melting state moves forwards in a second screw cylinder g of the second extrusion device 18 and is continuously heated, the temperature is heated to 350-365 ℃ from 250-260 ℃, under the rotation pushing action of the second screw p of the second extrusion device 18, the hot paste of the waste plastics is pressed to a first flow dividing head 13, the molten paste of the waste plastics is changed into linear motion from rotary motion due to the damping action of a porous plate, is divided into three parts through a partition plate and a conical core, and is respectively pressed into three film type cracking reaction chambers 14a, 14b, a circular plate and a circular plate through three discharge branch pipes Z1, 14c, the pressed waste plastic hot melt paste enters the film type cracking reaction cavities 14a, 14b and 14c heated by the fourth heating elements lambda, eta and alpha from the feeding ports at the tops of the film type cracking reaction cavities 14a, 14b and 14c, falls on the rotating distribution plate T, is thrown to the cylinder b1 of the film type cracking reaction cavity under the action of centrifugal force, rotates downwards along the cylinder b1 under the action of gravity and the rotation of the movable scale V, simultaneously, the movable scale V rotates tightly with the cylinder b1 under the action of centrifugal force, scrapes the flowing waste plastic hot melt paste into a film shape, gradually moves downwards, passes through a low temperature region, a medium temperature region and a high temperature region in sequence, different plastics are subjected to instant thermal cracking reaction in different temperature regions, and generated oil gas is discharged from the upper exhaust ports of the three film type cracking reaction cavities 14a, 14b and 14c, the high boiling point long chain products after thermal cracking generate short chain low boiling point oil gas under the catalysis of catalyst by entering into catalyst packing layers of corresponding catalytic adsorption towers 4, 11 and 12 through three first oil gas conveying branch pipes Z2, the low boiling point oil gas rises from the catalyst layers to the adsorption packing layers to remove organic chlorine and then is discharged from the tops of the three catalytic adsorption towers 4, 11 and 12, enters into the first condensers 1, 2 and 10 from oil gas inlets at the tops of the corresponding three first condensers 1, 2 and 10 through three second oil gas conveying branch pipes Z3, is condensed to obtain high-quality fuel oil and fuel gas, enters into the same receiving tank 3 from three oil gas inlets N2, N3 and N4 of the receiving tank through a third oil gas conveying branch pipe Z4, flows out from the bottom of a discharge hole N6 of the receiving tank 3, and flows into an oil storage tank 28 through a fourth oil gas conveying branch pipe Z5, the fuel gas is discharged from a top gas outlet N1 of the receiving tank, is compressed into liquefied gas by a fuel gas compressor 29 through a fuel gas header Z10, and enters a liquefied gas storage tank 30 for waste plastic drying and other uses. The generated carbon black moves downwards to the bottom along the inner wall of the dewaxing furnace 20 under the action of a rotary scraper L3, the carbon black reaching the bottom also contains a small amount of wax oil, the carbon black is discharged from material outlets at the bottoms of three film cracking reaction chambers 14a, 14b and 14c by a rotary discharging bottom scraper L4 and enters the same dewaxing furnace 20 at the lower part through three pneumatic combination valves 23, 24 and 25 and three bottom extension tubes Z9 respectively, under the rotation action of the scraper L3, the carbon black powder containing oil continuously moves from the center of the bottom of the tank to the cylinder wall and upwards turns along the cylinder wall, the circulation is repeated, the temperature of the cylinder wall of the dewaxing furnace 20 is 450-, high-quality base oil obtained after condensation by the second condenser 6 directly enters the gas-liquid separation tank 7, the liquid base oil is discharged from the bottom of the gas-liquid separation tank 7, enters the oil storage tank 19 through a liquid seal pipe Z7, tail gas is discharged from the upper part of the gas-liquid separation tank and is communicated with a fuel gas main pipe through a tail gas branch pipe Z8, return liquid in the catalytic flash tower 8 successively falls into a first umbrella-shaped cover C6 and a second umbrella-shaped cover C7 of the catalytic flash tower 8, and then is scattered onto the cylinder wall of the lower end C8 of the shell of the catalytic flash tower under the action of gravity for flash evaporation and rises to a catalytic layer of the catalytic flash tower 8. The method comprises the steps of ensuring to remove high-boiling residues containing wax oil carbon black to obtain dry loose carbon black powder, discharging the dry carbon black powder from a discharge port at the bottom of a dewaxing furnace 20, feeding the dry carbon black powder into a carbon black cooling machine 22 through a combination valve 21, cooling the scorching carbon black powder in water in a cooling water tank H6 in the forward moving process under the combined action of a screw H9 of the carbon black cooling machine 22 and the inner wall of a third screw H4, feeding the cooled carbon black powder into a carbon black collecting box 26 from a feeding port T2 of the carbon black collecting box 26, wherein the carbon black collecting box 26 consists of a box body T3, a box cover T1, a feeding port T2, a nitrogen inlet T5 and a trolley T4, and the carbon black collecting box 26 is replaced by nitrogen in advance and is cooled by water on the outer wall of the third screw H4 of the carbon black cooling machine 22 so as to prevent the carbon black from spontaneous combustion and avoid affecting the quality of the carbon black.

Different waste plastics are through compression feeder hopper (compression feed arrangement), exhaust formula extruder (first extrusion device), exhaust can (connecting device) exhaust back, the melting material distributes each diaphragm type pyrolysis reaction intracavity via bull pressure material aircraft nose (reposition of redundant personnel), the material is got rid of to intracavity section of thick bamboo wall under the effect of centrifugal force on, with the contact of high temperature section of thick bamboo wall, take place the schizolysis in the twinkling of an eye, the pyrolysis steam is through the further catalysis of corresponding catalytic adsorption tower and detach organic chlorine, obtain high-quality fuel and gas after condenser condensation again, carbon black powder discharges after dewaxing stove is handled. The device has large treatment capacity and is suitable for cracking polymers such as waste plastics, residual oil and the like.

The utility model discloses a realize schizolysis system of schizolysis high polymer, strong adaptability can not only handle waste plastics (PE, PP, PS), can also handle polymers such as waste engine oil, residual oil, but also can handle chloric polyvinyl chloride, and it is big to have a throughput, and reaction rate is fast, and effective conversion rate is close 100%, and equipment section of thick bamboo wall does not become carbon, does not have secondary pollution, and area is little, adapts to advantages such as continuous production throughout the year. The scale can reach 8-30 tons/day, and the defects of long reaction period, low oiling rate, solid waste and wastewater discharge, serious carbon deposition and secondary pollution caused by difficult cleaning of the existing domestic and foreign waste plastic treatment equipment are overcome.

In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims (13)

1. The utility model provides a realize pyrolysis system of schizolysis high polymer, its characterized in that, the schizolysis system include pretreatment unit and schizolysis unit, pretreatment unit include compression feed arrangement, first extrusion device, second extrusion device, the discharge gate of compression feed arrangement with the feed inlet of first extrusion device be linked together, the discharge gate of first extrusion device with the feed inlet of second extrusion device be connected through connecting, the schizolysis unit include three or more than three membrane type schizolysis reaction chamber, the discharge gate of second extrusion device with three or more than three membrane type schizolysis reaction chamber in the schizolysis unit be linked together, first extrusion device and second extrusion device all be provided with first heating element.

2. The cracking system for cracking high polymer according to claim 1, the discharge hole of the first extrusion device is connected with the feed hole of the second extrusion device through a connecting device, the connecting device is provided with a cylindrical upper part and a conical lower part, the top end of the cylindrical upper part is provided with an exhaust port, the upper part of the cylinder is provided with a first connecting port which is connected with the discharge hole of the first extruding device in a sliding and sealing way, the bottom end of the conical lower part is provided with a second connecting port which is communicated with the feed inlet of the second extrusion device, the first extrusion device and/or the second extrusion device is/are provided with an exhaust port for exhausting waste gas generated by heating, the conical lower part is provided with a third heating element for heating the flowing pasty high polymer.

3. The cracking system for cracking high polymer according to claim 1, the first extrusion device comprises a first speed reducer, a first coupler, a first bearing box and a first screw cylinder, the first speed reducer, the first coupler, the first bearing box, the feed inlet of the first extrusion device, the first screw cylinder and the discharge outlet of the first extrusion device are connected in sequence, the second extrusion device comprises a second speed reducer, a second coupling, a second bearing box and a second screw cylinder, the second speed reducer, the second coupling, the second bearing box, the feed inlet of the second extrusion device, the second screw cylinder and the discharge outlet of the second extrusion device are connected in sequence, the first screw cylinder and the second screw cylinder are respectively internally provided with a first screw rod and a second screw rod which are connected with the first bearing box and the second bearing box, and exhaust holes are formed in the first screw cylinder and the second screw cylinder.

4. The pyrolysis system for cracking high polymer according to claim 1, wherein the compressed feeding means comprises a cylindrical upper cylinder and a cylindrical lower cylinder, the diameter of the cylindrical upper cylinder is larger than that of the cylindrical lower cylinder, the compressed feeding means is provided with a stirring structure, the stirring structure comprises a stirring shaft and combined blades, and the combined blades comprise a rectangular blade corresponding to the cylindrical upper cylinder and a spiral blade corresponding to the cylindrical lower cylinder.

5. The cracking system for cracking high polymer according to claim 1, the discharge hole of the second extrusion device is communicated with three or more than three film type cracking reaction cavities in the cracking unit through a flow dividing head, the flow dividing head comprises a connecting bent pipe and a shell, one end of the connecting bent pipe is communicated with a discharge hole of the second extrusion device, the other end of the connecting bent pipe is connected with the inlet end part of the shell of the flow dividing head, the inlet end part of the shell is provided with a porous circular plate, a conical core and a partition board arranged around the conical core are arranged in the shell, the partition board divides the inner space of the shell into compartments corresponding to the number of the membrane type cracking reaction cavities, the outlet end part of the shell is provided with discharge ports corresponding to the number of the membrane type cracking reaction chambers; the housing is provided with a second heating element.

6. The polymer pyrolysis system of claim 1, wherein the pyrolysis unit further comprises an oil gas collecting device, the number of the oil gas collecting device corresponds to the number of the membrane type pyrolysis reaction chambers, the oil gas collecting device further comprises a first oil gas conveying branch pipe connected with the membrane type pyrolysis reaction chambers, a catalytic adsorption tower connected with an air outlet of the first oil gas conveying branch pipe, a second oil gas conveying branch pipe connected with the catalytic adsorption tower, a first condenser connected with an outlet of the second oil gas conveying branch pipe, a third oil gas conveying branch pipe connected with the first condenser, and a receiving tank connected with an outlet of the third oil gas conveying branch pipe, the air outlet of the membrane type pyrolysis reaction chamber is communicated with an air inlet at the bottom of the catalytic adsorption tower through the first oil gas conveying branch pipe, the gas outlet of the catalytic adsorption tower is communicated with the gas inlet at the top of the first condenser through a second oil-gas conveying branch pipe, the gas-liquid outlet at the top of the first condenser is communicated with the gas-liquid inlet at the side surface of the receiving tank through a third oil-gas conveying branch pipe, the gas outlet at the top of the receiving tank is communicated with the combustion main pipe, and the condensate outlet at the bottom of the first condenser is communicated with the condensate main pipe.

7. The system of claim 6, wherein the adsorption column comprises an upper end cap, a first middle section, a second middle section, a lower end cap, an upper grid, and a lower grid, the upper end cap, the first middle section, the second middle section, and the lower end cap are sequentially connected from top to bottom to form a tower, and the upper grid and the lower grid are sequentially fixed in the tower from top to bottom.

8. The system of claim 1, wherein the membrane cracking reaction chamber comprises a reaction chamber cylinder, a third speed reducer, and a stirring device with scale, the stirring device with scale comprises a stirring shaft, a distribution plate, a lantern holder and movable scale, the lantern holder is fixed on the stirring shaft, the movable scale is fixed on the lantern holder, and the movable scale can rotate freely; the reaction cavity barrel is provided with a fourth heating element to form a first temperature zone reaction cavity barrel, a second temperature zone reaction cavity barrel and a third temperature zone reaction cavity barrel from top to bottom respectively.

9. The cracking system for cracking high polymer according to claim 6, wherein the cracking unit further comprises a dewaxing furnace, a fifth oil-gas delivery branch pipe connected to the dewaxing furnace, a catalytic flash tower connected to the outlet of the fifth oil-gas delivery branch pipe, a sixth oil-gas delivery branch pipe connected to the catalytic flash tower, a second condenser connected to the outlet of the sixth oil-gas delivery branch pipe, a gas-liquid separation tank connected to the lower outlet of the second condenser, a seventh liquid delivery branch pipe connected to the bottom outlet of the gas-liquid separation tank, an eighth gas delivery branch pipe connected to the side outlet of the gas-liquid separation tank, and a telescopic pipe, the inlet of the dewaxing furnace is connected to the outlet of the membrane type cracking reaction chamber through the telescopic pipe, the outlet of the dewaxing furnace is connected to the inlet of the catalytic flash tower through the fifth oil-gas delivery branch pipe, the gas outlet of the catalytic flash tower is communicated with the inlet of the second condenser through the sixth oil gas conveying branch pipe, the outlet at the bottom of the second condenser is directly communicated with the gas inlet at the upper part of the gas-liquid separation tank, and the gas outlet at the side surface of the gas-liquid separation tank is communicated with the exhaust main pipe through the eighth gas conveying branch pipe; the dewaxing furnace is provided with a fourth inductive heating element, and the catalytic flash tower is provided with a sixth heating element.

10. The pyrolysis system for cracking high polymer according to claim 9, wherein the dewaxing furnace comprises a dewaxing furnace cylinder, a fourth speed reducer, and a scraper agitator, the scraper agitator comprises a main shaft, a scraper holder, a scraper, a bottom shaft, and a high-temperature sliding bearing, the scraper holder is fixed on the main shaft, the scraper is suspended on the scraper holder, and the bottom scraper is mounted at the bottom of the scraper holder.

11. The system of claim 9, wherein the discharge port of the bottom of the dewaxing furnace is connected to the feed inlet of a carbon black cooler, the discharge port of the carbon black cooler is connected to a carbon black collecting box, a nitrogen inlet is provided at the upper part of the carbon black collecting box, the carbon black cooler comprises a fourth speed reducer, a third coupler, a third bearing box and a third screw barrel, which are sequentially connected and fixed to the base through a bracket, a screw rod connected to the third coupler is provided in the third screw barrel, and a cooling water tank is provided on the outer wall of the third screw barrel.

12. The pyrolysis system for cracking high polymer as claimed in claim 9, wherein the catalytic flash tower comprises an upper shell, a first middle shell, a second middle shell, a lower shell, a first grid, a second grid, a first umbrella cover, and a second umbrella cover, the upper shell, the first middle shell, the second middle shell, and the lower shell are sequentially connected from top to bottom to form a tower body, the lower end of the catalytic flash tower is provided with a sixth heating element, and the first grid, the second grid, the first umbrella cover, and the second umbrella cover are sequentially fixed in the tower body from top to bottom.

13. The system of claim 11, wherein the compression-type feeding device, the first extruding device, the second extruding device, and the receiving tank, the first condenser, the catalytic adsorption tower, the membrane type cracking reaction chamber, the second condenser, the catalytic flash tower, the gas-liquid separation tank, the dewaxing furnace, and the carbon black cooler are sequentially assembled on a same skid holder from top to bottom.

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