WO2022067883A1

WO2022067883A1 - Conveying and cooling method for high-temperature solid product obtained after waste plastic cracking

Info

Publication number: WO2022067883A1
Application number: PCT/CN2020/120685
Authority: WO
Inventors: 张德伟; 王孔烁; 李利; 汪传生; 卫健; 汪国春; 平伟; 李文昱; 牛广智; 田晓龙; 郭磊; 尹凤福; 边慧光; 李绍明; 梁辉; 陈宏波
Original assignee: 无锡金球机械有限公司; 青岛科技大学
Priority date: 2020-09-29
Filing date: 2020-10-13
Publication date: 2022-04-07
Also published as: CN112209033A

Abstract

A conveying and cooling method for a high-temperature solid product obtained after waste plastic cracking. The conveying and cooling method comprises the following steps: 1) primary cooling: enabling the high-temperature solid product obtained after waste plastic cracking to enter a first spiral conveying apparatus (100) for cooling; 2) secondary cooling: enabling the solid product to enter a second spiral conveying apparatus (200) from the first spiral conveying apparatus (100) by means of a shifting device (500) for cooling; 3) tertiary cooling: enabling the solid product to enter a third spiral conveying apparatus (300) for cooling; and 4) storing and discharging: enabling the solid product to enter a storage tank (400), opening an electric valve (41), and discharging residues. High-temperature cracking residues are cooled in a staged mode by means of multi-stage spiral conveying; low-temperature discharging and conveying of the high-temperature residues are achieved; the residues are compressed and stacked in a spiral conveying process; self-sealing of the apparatus is achieved by means of natural gravity stacking of the residues; cracking gas is prevented from escaping; external gas is prevented from entering; and the sealing method is simple, effective and environmentally friendly.

Description

Conveying and cooling method of high temperature solid product after waste plastic cracking

technical field

The invention relates to the technical field of plastic cracking, in particular to a method for conveying and cooling a high-temperature solid product after the cracking of waste plastics.

Background technique

With the rapid development of the plastics industry and the continuous upgrading of people's demand for plastic products, the plastics industry has formed a complete industrial chain in just a few decades. my country's plastics industry has broad market prospects and great development potential. A large number of waste plastics have also caused serious environmental pollution problems. The recycling, regeneration and utilization of waste plastics has become a research hotspot at home and abroad and has gradually formed an emerging industry.

Therefore, the recycling of waste plastics has important practical significance. It is imperative to explore efficient, economical and environmentally friendly plastic waste recycling and processing technologies. How to solve the problem of recycling plastic waste resources without causing secondary pollution to the ecological environment has become an international problem that the world needs to overcome urgently. In the recycling and reuse of waste plastics, the thermal cracking process is widely used as a common method of recycling waste plastics. Because of its low energy consumption, no need for pressure and high production efficiency, the thermal cracking process of waste plastics is widely used, so waste plastics are continuously Pyrolysis design is particularly important.

The products of waste plastic cracking include cracked gas, cracked oil and residue. Due to the high temperature during thermal cracking, the product also has a high temperature. Therefore, in order to realize the low temperature discharge of the residue, it is particularly important to design a cooling discharge method.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the present invention provides a method for conveying and cooling high-temperature solid products after waste plastics cracking, so as to realize the purpose of low-temperature discharge of waste plastics cracking residues. The technical scheme adopted in the present invention is:

A method for conveying and cooling a high-temperature solid product after pyrolysis of waste plastics, wherein: comprising the following steps:

(1) Primary cooling: after the waste plastic is cracked, the high-temperature solid product enters the first screw conveying device, and cooling water is introduced into the first screw conveying device to cool the solid product;

(2) Secondary cooling: After the waste plastics treated in step (1) are cracked, the high-temperature solid product enters the feeding device from the first screw conveying device, and the feeding impeller of the feeding device rotates under the drive of the explosion-proof motor, continuously The solid product is dialed into the barrel feeding section of the second screw conveying device, and cooling water is introduced into the second screw conveying device to cool the solid product;

(3) three-stage cooling: the high-temperature solid product enters the third screw conveying device after the waste plastics treated in step (2) is cracked, and cooling water is introduced into the third screw conveying device to cool the solid product;

(4) Storage discharge: after the waste plastics treated in step (3) are cracked, the high-temperature solid product enters the storage tank, and when the high-temperature solid product in the storage tank reaches 80%-90% of the volume of the storage tank, Open the electric valve to discharge the residue.

Preferably, in the method for conveying and cooling the high-temperature solid product after pyrolysis of waste plastics, wherein: the temperature of the solid product in the step (1) is lowered from 500±10°C to 400±10°C; the step (2) the solid product The temperature is lowered from 400±10°C to 200±10°C; the temperature of the solid product in the step (3) is lowered from 200±10°C to 50±10°C.

Preferably, in the method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics, wherein: the first screw conveying device includes a first screw conveying mechanism and a first explosion-proof motor arranged at the left end of the first screw conveying mechanism, so A frame is arranged at the lower end of the first screw conveying equipment.

Preferably, in the method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics, wherein: the first screw conveying mechanism comprises a barrel sealing transmission section and a barrel working section sequentially connected from left to right, and the machine The barrel seal transmission section is close to one end of the first explosion-proof motor, and a screw drive shaft sleeve is arranged in the barrel seal transmission section, and the screw drive shaft sleeve is connected with the power output shaft of the first explosion-proof motor through a double-diaphragm coupling, A first screw shaft is arranged inside the working section of the barrel, the first screw shaft and the first screw drive shaft sleeve are connected by a rectangular spline, and the space between the first screw shaft and the first screw drive shaft sleeve is set in the connection The first graphite packing; the upper ends of the barrel sealing transmission section and the barrel working section are provided with cooling water inlets, and the lower ends of the barrel sealing transmission section and the barrel working section are both provided with cooling water outlets.

Preferably, in the method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics, wherein: the feeding device comprises a feeding device casing, and a feeding impeller is arranged in the casing of the feeding device, and the feeding A fourth explosion-proof motor is arranged on the outside of the device casing.

Preferably, in the method for conveying and cooling the high-temperature solid product after pyrolysis of waste plastics, wherein: the second screw conveying device includes a second screw conveying mechanism and a second explosion-proof motor arranged at the right end of the second screw conveying mechanism, so A frame is arranged at the lower end of the second screw conveying equipment.

Preferably, in the method for conveying and cooling the high-temperature solid product after pyrolysis of waste plastics, wherein: the second screw conveying mechanism comprises a barrel feeding section, a barrel cooling section and a barrel outlet sequentially connected from left to right In the material section, a left bearing seat is arranged at the left end of the barrel feeding section, a left packing seat is arranged in the left bearing seat, a second screw shaft is arranged in the barrel cooling section, and the left end of the second screw shaft and the left A second graphite packing is arranged between the packing seats, a right bearing seat is arranged at the right end of the barrel discharge section, and a right packing seat and a second screw drive shaft sleeve are arranged in the right bearing seat. A third graphite packing is arranged between the second screw shaft and the right end of the second screw shaft, the right end of the second screw shaft is connected to the second screw drive shaft sleeve, and the second screw drive shaft sleeve is connected to the second explosion-proof motor through a double-diaphragm coupling ; The cooling water inlets are arranged at the upper end of the barrel cooling section and the left bearing seat, and the cooling water outlets are both arranged at the lower end of the barrel cooling section and the left bearing seat.

Preferably, in the method for conveying and cooling the high-temperature solid product after pyrolysis of waste plastics, wherein: the third screw conveying device includes a third screw conveying mechanism and a third explosion-proof motor arranged at the right end of the third screw conveying mechanism, so A frame is arranged at the lower end of the third screw conveying equipment.

Preferably, in the method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics, wherein: the third screw conveying mechanism comprises a barrel feeding section, a barrel cooling section and a barrel discharging section, and the barrel A left bearing seat is arranged at the left end of the feeding section, a left packing seat is arranged in the left bearing seat, a screw shaft is arranged in the cooling section of the barrel, the left end of the screw shaft is connected to the left packing seat, and the left end of the screw shaft and the left A fourth graphite packing is arranged in the space between the packing seats; a right bearing seat is arranged at the right end of the discharge section of the barrel, a third screw drive shaft sleeve is arranged in the right bearing seat, and the left end of the third screw drive shaft sleeve is arranged Connect the third screw shaft, the right end of the third screw shaft and the gap between the third screw drive shaft sleeve are provided with a fifth graphite packing, and the third screw drive shaft sleeve is connected to the third explosion-proof motor through a double-diaphragm coupling The upper end of the barrel cooling section is provided with a cooling water inlet, and the lower end of the barrel cooling section is provided with a cooling water outlet.

Preferably, in the method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics, wherein: the storage tank includes a storage tank body and a bracket at the lower end of the storage tank body, and the middle of the bottom end of the storage tank body is provided with The discharge port is provided with an electric valve.

Advantages of the invention: Compared with the prior art, the high-temperature cracking residue is cooled by stages through multi-stage screw conveying, which can realize the low-temperature discharge of the high-temperature residue. It is self-sealing to prevent the pyrolysis gas from escaping; the conveying and cooling method of the high-temperature solid product after the pyrolysis of waste plastics is simple and effective, which can realize the continuous production of waste plastics pyrolysis, improve production efficiency, be environmentally friendly, and reduce production costs; The conveying and cooling equipment for the high-temperature solid product has a simple structure, can realize the continuous production of waste plastic cracking, improve the production efficiency, is environmentally friendly, and reduces the production cost.

Description of drawings

FIG. 1 is a process flow block diagram of Embodiment 1 of the present invention.

FIG. 2 is a front view of the structure of the conveying and cooling equipment for the high-temperature solid product after the pyrolysis of waste plastics in Example 2 of the present invention.

3 is a top view of the structure of the conveying and cooling equipment for the high-temperature solid product after the pyrolysis of waste plastics in Example 2 of the present invention.

FIG. 4 is a schematic cross-sectional view of the structure of the first screw conveying device in Embodiment 2 of the present invention.

FIG. 5 is a schematic cross-sectional view of the structure of the second screw conveying device in Embodiment 2 of the present invention.

FIG. 6 is a schematic cross-sectional view of the structure of the third screw conveying device in Embodiment 2 of the present invention.

FIG. 7 is a schematic cross-sectional view of the distributing device according to Embodiment 2 of the present invention.

8 is a front view of a storage tank in Embodiment 2 of the present invention.

Detailed ways

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

Example 1

As shown in Figure 1, the present embodiment provides a method for conveying and cooling a high-temperature solid product after pyrolysis of waste plastics, wherein the method comprises the following steps:

(1) Primary cooling: after the waste plastic is cracked, the high-temperature solid product enters the first screw conveying device 100, and cooling water is introduced into the first screw conveying device 100, so that the temperature of the solid product is reduced from 500±10°C to 400±10°C;

(2) Secondary cooling: After the waste plastics treated in step (1) are cracked, the high-temperature solid product enters the feeding device 500 from the first screw conveying device 10, and the feeding impeller 38 rotates under the drive of the explosion-proof motor 37, and continuously The solid product is transferred into the barrel feeding section 19 of the second screw conveying device 200, and cooling water is introduced into the second screw conveying device 200, so that the temperature of the solid product is reduced from 400 ± 10 ° C to 200 ± 10 ° C;

(3) Three-stage cooling: after the waste plastics treated in step (2) are cracked, the high-temperature solid product enters the third screw conveying device 300, and cooling water is introduced into the third screw conveying device 300, so that the temperature of the solid product is reduced from 200±10 ℃ dropped to 50±10℃;

(4) Storage discharge: after the waste plastics processed in step (3) are cracked, the high-temperature solid product enters the storage tank 400, and when the high-temperature solid product in the storage tank 400 reaches 80%-90% of the volume of the storage tank 400 %, open the electric valve to discharge the residue.

Example 2

As shown in FIGS. 2 to 8 , this embodiment provides a conveying and cooling device for high-temperature solid products after pyrolysis of waste plastics, including a first screw conveying device 100 , a second screw conveying device 200 , and a third screw conveying device 300 connected in sequence. and the storage tank 400 , the output port of the first screw conveying device 100 is connected to the input port of the feeding device 500 , and the output port of the feeding device 500 is connected to the input port of the second screw conveying device 200 .

Wherein: the first screw conveying device 100 includes a first screw conveying mechanism and a first explosion-proof motor 3 arranged at the left end of the first screw conveying mechanism, and a frame 10 is arranged at the lower end of the first screw conveying device.

Wherein: the first screw conveying mechanism includes a barrel sealing transmission section 9 and a barrel working section 8 sequentially connected from left to right, the barrel sealing transmission section 9 is close to one end of the first explosion-proof motor 3, and the barrel A screw drive shaft sleeve 5 is arranged in the sealed transmission section 9, and the screw drive shaft sleeve 5 is connected with the power output shaft of the first explosion-proof motor 3 through a double-diaphragm coupling 4. A screw shaft 7, the first screw shaft 7 and the first screw drive shaft sleeve 5 are connected by rectangular splines, and a first graphite disk is arranged in the space where the first screw shaft 7 and the first screw drive shaft sleeve 5 are connected root 6.

Wherein: the upper ends of the barrel sealing transmission section 9 and the barrel working section 8 are provided with cooling water inlets, and the lower ends of the barrel sealing transmission section 9 and the barrel working section 8 are both provided with cooling water outlets.

Wherein: the second screw conveying device 200 includes a second screw conveying mechanism and a second explosion-proof motor 11 arranged at the right end of the second screw conveying mechanism, and a frame 23 is arranged at the lower end of the second screw conveying device.

Wherein: the second screw conveying mechanism includes a barrel feeding section 19, a barrel cooling section 18 and a barrel discharging section 16 connected in sequence from left to right, and a left bearing seat is arranged at the left end of the barrel feeding section 19 22. A left packing seat 21 is arranged in the left bearing seat 22, a second screw shaft 17 is arranged in the barrel cooling section 18, and a second screw shaft 17 is arranged between the left end of the second screw shaft 17 and the left packing seat 21. The graphite packing 20, the right end of the barrel discharge section 16 is provided with a right bearing seat 22, the right bearing seat 22 is provided with a right packing seat and a second screw drive shaft sleeve 13, the right packing seat and the second A third graphite packing 16 is arranged between the right ends of the screw shaft 17 , the right end of the second screw shaft 17 is connected to the second screw drive shaft sleeve 13 , and the second screw drive shaft sleeve 13 is connected to the second screw drive shaft sleeve 13 through the double-diaphragm coupling 12 . Two explosion-proof motors 11 .

Wherein: the barrel cooling section 18 and the upper end of the left bearing seat 22 are provided with cooling water inlets, and the barrel cooling section 18 and the lower end of the left bearing seat 22 are provided with cooling water outlets.

Wherein: the third screw conveying device 300 includes a third screw conveying mechanism and a third explosion-proof motor 24 arranged at the right end of the third screw conveying mechanism, and a frame 36 is arranged at the lower end of the third screw conveying device.

Wherein: the third screw conveying mechanism includes a barrel feeding section 32, a barrel cooling section 30 and a barrel discharging section 29, a left bearing seat 35 is provided at the left end of the barrel feeding section 32, and the left bearing seat A left packing seat 33 is arranged in 35, a screw shaft 31 is arranged in the barrel cooling section 30, the left end of the screw shaft 31 is connected to the left packing seat 33, and the left end of the screw shaft 31 and the left packing seat 33 are connected. A fourth graphite packing 34 is arranged in the gap; a right bearing seat 25 is arranged at the right end of the barrel discharge section 29, a third screw drive bushing 27 is arranged in the right bearing seat 25, and the left end of the third screw drive bushing 27 is arranged Connecting the third screw shaft 31, a fifth graphite packing 28 is arranged in the gap between the right end of the third screw shaft 31 and the third screw drive shaft sleeve 27, and the third screw drive shaft sleeve 27 passes through the double-diaphragm coupling 26 is connected to the third explosion-proof motor 24 .

Wherein: the upper end of the barrel cooling section 30 is provided with a cooling water inlet, and the lower end of the barrel cooling section 30 is provided with a cooling water outlet.

Wherein: the storage tank 400 includes a storage tank body 40 and a bracket 42 at the lower end of the storage tank body 40 , a discharge port is arranged in the middle of the bottom end of the storage tank body 40 , and an electric valve 41 is arranged on the discharge port.

Wherein: the feeding device 500 includes a feeding device casing 39 , a feeding impeller 38 is arranged in the feeding device casing 39 , and a fourth explosion-proof motor 37 is arranged outside the feeding device casing 39 .

The first screw conveying device 100 is horizontal to the ground, the second screw conveying device 200 is arranged at a certain angle to the ground, and the third screw conveying device 300 is arranged at a certain angle to the ground; the first screw conveying device 100 and the second screw conveying device are horizontally parallel Arrangement, the third screw conveying device 300 and the second screw conveying device 200 are arranged at a certain angle, the storage tank 400 is arranged horizontally and parallel to the first screw conveying device 100 and the second screw conveying device 200; the first screw conveying device 100 and the dial The feeding device 400 is connected by bolts; the feeding device 400 and the second screw conveying device 200 are connected by bolts; the second screw conveying device 200 and the third screw conveying device 300 are provided with a bellows compensator 1, which adopts Bolted connection; a bellows compensator 2 is arranged between the third screw conveying device 300 and the material storage tank 400, and is connected by bolts.

The explosion-proof motor 3 and the double-diaphragm coupling 4 are connected by a flat key, the double-diaphragm coupling 4 and the first screw drive bushing 5 are connected by a flat key, and the first screw drive bushing 5 is connected with the first screw shaft 7 is connected by a rectangular spline; the first graphite packing 6 is installed on the right end of the barrel sealing transmission section 9, the barrel sealing transmission section 9 and the barrel working section 8 are connected by bolts, and the barrel working section 8 adopts a jacket structure. , with a spiral cooling water channel.

The explosion-proof motor 11 and the double-diaphragm coupling 12 are connected by a flat key, and the double-diaphragm coupling 12 and the second screw drive shaft sleeve 13 are connected by a flat key; The screw shafts 17 are connected by rectangular splines; the second graphite packing 15 is installed on the left side of the right bearing seat 14; the barrel discharge section 16 and the barrel cooling section 18 are connected by bolts; the barrel cooling section 18 adopts a jacket The barrel cooling section 18 and the barrel feeding section 19 are connected by bolts; the barrel feeding section 19 is connected with the left packing seat 21 by bolts; the left packing seat 21 is connected with the left The bearing seat 22 is connected by bolts, and a cooling water channel is arranged in the left packing seat 22 ; the third graphite packing 20 is installed on the right side of the left packing seat 21 .

The explosion-proof motor 24 and the double-diaphragm coupling 26 are connected by a flat key, and the double-diaphragm coupling 26 and the third screw drive shaft sleeve 27 are connected by a flat key; The screw shafts 31 are connected by rectangular splines; the fourth graphite packing 28 is installed on the left side of the right bearing seat 25; the barrel discharge section 29 and the barrel cooling section 30 are connected by bolts; the barrel cooling section 30 adopts a jacket The barrel cooling section 30 is connected with the barrel feeding section 32 by bolts, the barrel feeding section 32 is connected with the left packing base 33 by bolts, and the left packing base 33 is connected with the left packing base 33 by bolts. The bearing seat 35 is connected by bolts, and the graphite packing 34 is installed on the right side of the left packing seat 33 .

Bolts are used between the explosion-proof motor 37 and the casing 39 of the feeding device, the extension shaft of the feeding impeller 38 is directly inserted into the hole of the explosion-proof motor 37, and the feeding impeller 38 and the explosion-proof motor 37 are connected by a flat key.

The storage tank 40 can be regarded as a cylinder and a cone. The electric valve 41 is installed at the discharge port of the storage tank 40. The electric valve 41 and the storage tank 40 are connected by bolts. The bottom of the storage tank body 40 is evenly distributed.

The working process of the conveying and cooling equipment for high-temperature solid products after waste plastics cracking: the first explosion-proof motor 3 drives the first screw drive sleeve 5 to rotate through the double-diaphragm coupling 4, and the first screw drive sleeve 5 drives through the rectangular spline. The first screw shaft 7 rotates, and the residue at 500°C falls into the barrel working section 8 from above the left inlet. At this time, the first graphite packing 6 is heated and expanded to prevent gas from escaping; the residue is pushed by the first screw shaft 7 It moves forward continuously from left to right, and at the same time, due to the existence of the spiral cooling water channel in the working section 8 of the barrel, the residue will be continuously cooled and cooled down, because the first screw shaft 7 has a certain compression ratio, so the residue will be It is continuously compressed until it reaches the rightmost end of the working section 8 of the barrel. At this time, the temperature of the residue drops to 400°C. At the same time, the residue will accumulate a lot here. The purpose of letting the residue accumulate is to use the accumulation to realize the device. Self-sealing, with the progress of the accumulation, the accumulation height continues to rise, the residue will enter the feeding device 500 from the right outlet of the working section 8 of the barrel, and the feeding impeller 38 will rotate under the driving of the explosion-proof motor 37, and the residue will be continuously removed. Dial into the feeding section 19 of the barrel, the explosion-proof motor 11 drives the second screw drive sleeve 13 to rotate through the double-diaphragm coupling 12, and the second screw drive sleeve 13 drives the second screw shaft 17 to rotate through the rectangular spline. After entering the barrel feeding section 19, the third graphite packing 15 and the second graphite packing 20 are thermally expanded, and the residue is continuously transported upwards from the bottom at a certain angle under the push of the conveying screw main body 17, and is sequentially cooled by the barrel Section 18 and barrel discharge section 16, under the cooling action of the barrel cooling section 18, when the residue reaches the barrel discharge section 16, the temperature drops from 400°C to 200°C; then the residue enters from the barrel discharge section 16. In the barrel feeding section 32, the explosion-proof motor 24 drives the third screw drive sleeve 27 to rotate through the double-diaphragm coupling 26, and the third screw drive sleeve 27 drives the third screw shaft 31 to rotate through the rectangular spline, and the residue enters the machine. After the barrel is fed into the material section 32, the fifth graphite packing 28 and the fourth graphite packing 34 are thermally expanded, and the residue is continuously transported upwards from the bottom at a certain angle under the push of the third screw shaft 31, and is cooled in the barrel cooling section 30. Under the cooling effect, when the residue reaches the barrel discharge section 29, the temperature drops from 200 ° C to 50 ° C, and then the residue enters the storage tank 400 through the barrel discharge section 29. When discharging is required, open the electric valve 41 to remove the residue. discharge.

Compared with the prior art, in the present invention, the high-temperature cracking residue is cooled by stages through multi-stage screw conveying, so that the low-temperature discharge of the high-temperature residue can be realized; the residue is compressed and accumulated in the screw conveying, and the self-sealing of the equipment is realized by the accumulation of the residue itself, The cracking gas is prevented from escaping; the method is simple and effective, and can realize the continuous production of waste plastic cracking, improve the production efficiency, be environmentally friendly, and reduce the production cost.

Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims

A method for conveying and cooling a high-temperature solid product after pyrolysis of waste plastics is characterized in that: comprising the following steps:

(1) primary cooling: after the waste plastic is cracked, the high-temperature solid product enters the first screw conveying device (100), and cooling water is introduced into the first screw conveying device (100) to cool the solid product;

(2) Secondary cooling: After the waste plastics treated in step (1) are pyrolyzed, the high-temperature solid product enters the feeding device (500) from the first screw conveying device (100), and the feeding impeller (500) of the feeding device (500). 38) Under the driving of the explosion-proof motor (37), the solid product is continuously dialed into the barrel feeding section (19) of the second screw conveying device (200), and the second screw conveying device (200) is cooled water to cool the solid product;

(3) Three-stage cooling: after the waste plastics treated in step (2) are cracked, the high-temperature solid product enters the third screw conveying device (300), and cooling water is introduced into the third screw conveying device (300) to cool the solid product ;

(4) Storage discharge: after the waste plastics processed in step (3) are cracked, the high-temperature solid product enters the storage tank (400), and when the high-temperature solid product in the storage tank (400) reaches the volume of the storage tank (400) When the volume is 80%-90%, open the electric valve to discharge the residue.
The method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics according to claim 1, characterized in that: the temperature of the solid product in the step (1) is lowered from 500±10°C to 400±10°C; the step (2) The temperature of the solid product is lowered from 400±10°C to 200±10°C; the temperature of the solid product in the step (3) is lowered from 200±10°C to 50±10°C.
The method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics according to claim 1, wherein the first screw conveying device (100) comprises a first screw conveying mechanism and a second screw conveying mechanism disposed at the left end of the first screw conveying mechanism. An explosion-proof motor (3), and a frame (10) is arranged at the lower end of the first screw conveying device (100).
The method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics according to claim 3, characterized in that: the first screw conveying mechanism comprises a barrel sealing transmission section (9) connected in sequence from left to right and a barrel working section Section (8), the barrel sealing transmission section (9) is close to one end of the first explosion-proof motor (3), the barrel sealing transmission section (9) is provided with a screw drive shaft sleeve (5), the screw drive shaft The sleeve (5) is connected with the power output shaft of the first explosion-proof motor (3) through a double-diaphragm coupling (4), and a first screw shaft (7) is arranged inside the barrel working section (8). The first screw shaft (7) and the first screw drive shaft sleeve (5) are connected by rectangular splines, and a first graphite is arranged in the gap between the first screw shaft (7) and the first screw drive shaft sleeve (5) Packing (6); the upper ends of the barrel sealing transmission section (9) and the barrel working section (8) are provided with cooling water inlets, and the barrel sealing transmission section (9) and the lower ends of the barrel working section (8) are provided with cooling water inlets All cooling water outlets are provided.
The method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics according to claim 1, characterized in that: the feeding device (500) comprises a feeding device casing (39), and the feeding device casing (39) ) is provided with a feeding impeller (38), and a fourth explosion-proof motor (37) is provided outside the casing (39) of the feeding device.
The method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics according to claim 1, characterized in that: the second screw conveying device (200) comprises a second screw conveying mechanism and a first screw conveying mechanism disposed at the right end of the second screw conveying mechanism Two explosion-proof motors (11), and a frame (23) is arranged at the lower end of the second screw conveying device (200).
The method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics according to claim 6, characterized in that: the second screw conveying mechanism comprises a barrel feeding section (19), a barrel cooling section, which are sequentially connected from left to right. Section (18) and barrel discharge section (16), a left bearing seat (22) is arranged at the left end of the barrel feeding section (19), and a left packing seat (21) is arranged in the left bearing seat (22) , a second screw shaft (17) is arranged in the barrel cooling section (18), and a second graphite packing (20) is arranged between the left end of the second screw shaft (17) and the left packing seat (21), A right bearing seat (22) is arranged at the right end of the barrel discharge section (16), and a right packing seat and a second screw drive shaft sleeve (13) are arranged in the right bearing seat (22). A third graphite packing (16) is arranged between the second screw shaft (17) and the right end of the second screw shaft (17), and the right end of the second screw shaft (17) is connected to the second screw drive shaft sleeve (13), which is connected to the second screw drive shaft sleeve (13). (13) The second explosion-proof motor (11) is connected through the double-diaphragm coupling (12); the cooling water inlet is provided on the upper end of the barrel cooling section (18) and the left bearing seat (22), and the barrel is cooled Both the section (18) and the lower end of the left bearing seat (22) are provided with cooling water outlets.
The method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics according to claim 1, wherein the third screw conveying device (300) comprises a third screw conveying mechanism and a third screw conveying mechanism arranged at the right end of the third screw conveying mechanism. Three explosion-proof motors (24), and a frame (36) is arranged at the lower end of the third screw conveying device (300).
The method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics according to claim 8, wherein the third screw conveying mechanism sequentially comprises a barrel feeding section (32) and a barrel cooling section (32) from left to right. 30) and the barrel discharge section (29), the left end of the barrel feed section (32) is provided with a left bearing seat (35), and the left bearing seat (35) is provided with a left packing seat (33), so A screw shaft (31) is arranged in the barrel cooling section (30), the left end of the screw shaft (31) is connected to the left packing seat (33), and the left end of the screw shaft (31) and the left packing seat (33) are connected. A fourth graphite packing (34) is arranged in the gap between the cylinders; a right bearing seat (25) is arranged at the right end of the barrel discharge section (29), and a third screw drive bushing (27) is arranged in the right bearing seat (25). ), the left end of the third screw drive shaft sleeve (27) is connected to the third screw shaft (31), the right end of the third screw shaft (31) and the gap between the third screw drive shaft sleeve (27) are provided with fifth graphite Packing (28), the third screw drive shaft sleeve (27) is connected to the third explosion-proof motor (24) through a double-diaphragm coupling (26); the upper end of the barrel cooling section (30) is provided with cooling water The cooling water outlet is provided at the lower end of the barrel cooling section (30).
The method for conveying and cooling high-temperature solid products after pyrolysis of waste plastics according to claim 1, wherein the storage tank (400) comprises a storage tank body (40) and a support at the lower end of the storage tank body (40). (42), a discharge port is provided in the middle of the bottom end of the storage tank body (40), and an electric valve (41) is provided on the discharge port.