Pyrolysis crude carbon black production equipment

Abstract

The utility model provides pyrolytic crude carbon black production equipment, which belongs to the field of waste rubber and plastic pyrolysis and comprises a pyrolytic reaction kettle with a feed inlet and a slag outlet; the heat compensation deslagging spiral device is connected with the pyrolytic reaction kettle through a slag outlet; the heating device is used for providing heat required by pyrolysis for the pyrolysis reaction kettle and providing heat required by carbon black drying treatment for the heat compensation deslagging spiral device, and comprises a hot blast stove; the mixed combustion chamber is connected with one side of the hot-blast stove; the high-temperature flue gas pipeline is connected with the other side of the hot blast stove and provided with a high-temperature flue gas outlet; the pyrolytic reaction kettle is sleeved with the heating box body, and the heating box body is connected with a high-temperature flue gas pipeline through a high-temperature flue gas outlet; and part of the heat compensation deslagging spiral device moves into the high-temperature flue gas pipeline. The utility model solves the technical problem that the toluene light transmittance does not reach the standard due to the fact that the carbon black obtained by the conventional cracking process is not completely cracked, part of tar still exists on the surface of the carbon black and the polycyclic aromatic hydrocarbon content is high, and has the characteristic of obviously improving the toluene light transmittance of the carbon black.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of waste rubber and plastic pyrolysis, especially relates to a pyrolysis coarse carbon black production equipment. BACKGROUND

[0002] Waste tire thermal cracking refers to a kind of irreversible thermochemical reaction that organic matter in waste tire is cracked, volatile products are escaped and solid coke is formed by using high temperature in oxygen-free or oxygen-deficient atmosphere.In the process of incomplete thermal degradation, gas, liquid and solid products can be formed, and waste tires can be completely cracked into pyrolysis oil, pyrolysis carbon black and pyrolysis non-condensable gas and other useful products by using the method.Among them, the carbon black accounts for 30%-35% in the products after waste tire thermal cracking, and is the second largest product of tire cracking.

[0003] As an important material in the industry, carbon black is known for its black color and high color saturation of carbon atoms. With strong light absorption and optical properties, it plays a key role in the dye, paint and rubber industries. When discussing the characteristics of carbon black, toluene transmittance is a key indicator, which measures the penetration ability of carbon black to toluene solution. However, the carbon black produced by conventional cracking process is not completely cracked, and there is still some tar on the surface of carbon black, and the polycyclic aromatic hydrocarbon is high, resulting in substandard toluene transmittance. SUMMARY

[0004] The details of one or more embodiments of the utility model are presented in the following drawings and description, so that other features, purposes and advantages of the application are more concise and easy to understand.

[0005] The utility model provides a pyrolysis coarse carbon black production equipment, solve the carbon black that the conventional cracking process comes out not completely cracked, and there is still some tar on the surface of carbon black, and the polycyclic aromatic hydrocarbon is high, resulting in substandard toluene transmittance technical problem, it has the characteristics that can significantly improve the toluene transmittance of carbon black.

[0006] A pyrolysis coarse carbon black production equipment, comprising: a pyrolysis reactor with a feed inlet and a slag outlet; a heat supplementing and slag discharging screw device connected with the pyrolysis reactor through the slag outlet; a heating device comprising: a hot blast furnace; a mixed combustion chamber connected with one side of the hot blast furnace; a high-temperature flue gas pipeline connected with the other side of the hot blast furnace and having a high-temperature flue gas outlet; a heating box body sleeved on the outside of the pyrolysis reactor and connected with the high-temperature flue gas pipeline through the high-temperature flue gas outlet; part of the heat supplementing and slag discharging screw device penetrates into the high-temperature flue gas pipeline.

[0007] In some embodiments, the pyrolysis reactor comprises a first pyrolysis reactor and a second pyrolysis reactor connected in series; the first pyrolysis reactor is arranged close to the feed inlet of the pyrolysis reactor, and the second pyrolysis reactor is arranged close to the slag outlet of the pyrolysis reactor; the heating box comprises a first heating box arranged outside the first pyrolysis reactor and a second heating box arranged outside the second pyrolysis reactor; the high-temperature flue gas outlet comprises a first high-temperature flue gas outlet connecting the first heating box and the high-temperature flue gas pipeline, and a second high-temperature flue gas outlet connecting the second heating box and the high-temperature flue gas pipeline.

[0008] In some embodiments, the first high-temperature flue gas outlet is arranged close to the hot blast stove.

[0009] In some embodiments, the first pyrolysis reactor and the second pyrolysis reactor are connected by flanges.

[0010] In some embodiments, the heat-supplementing and slag-discharging screw device comprises a cylinder, a rotating shaft arranged inside the cylinder, a spiral blade arranged outside the rotating shaft, and a transmission member for driving the rotating shaft to rotate; the transmission member is arranged at one end of the cylinder; the other end of the cylinder penetrates into the high-temperature flue gas pipeline.

[0011] In some embodiments, the cylinder comprises a first cylinder and a second cylinder connected in series; the first cylinder and the second cylinder are connected by flanges; the first cylinder is arranged away from the transmission member, and the first cylinder is arranged in the high-temperature flue gas pipeline.

[0012] In some embodiments, the pyrolysis coarse carbon black production device further comprises a water-cooled screw slag-discharging device.

[0013] The first cylinder is arranged away from the transmission member, and the first cylinder is arranged in the high-temperature flue gas pipeline.

[0014] In some embodiments, the heating device further comprises a heating burner arranged on the side plate of the hot blast stove, and a heat exchanger connected to the heating burner.

[0015] In some embodiments, the pyrolysis coarse carbon black production device further comprises a screw feeding device connected to the feed inlet of the pyrolysis reactor, a buffer bin connected to the feed inlet of the screw feeding device, and a feed bin connected to the buffer bin.

[0016] In some embodiments, the pyrolysis crude carbon black production equipment further comprises a solid-gas separation bin connected with the discharge end of the pyrolysis reactor, and a self-blocking gas discharge screw device connected with the solid-gas separation bin, and the heat-supplementing discharge screw device is connected with the discharge port of the pyrolysis reactor through the self-blocking gas discharge screw device.

[0017] Compared with the prior art, the pyrolysis crude carbon black production equipment has the beneficial effects that:

[0018] The pyrolysis crude carbon black production equipment provided by the present application has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are included to provide a further understanding of the present application and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0020] Figure 1 The pyrolysis crude carbon black production equipment provided by the present application has the advantages that:

[0021] In the above drawings: 1, pyrolysis reactor; 2, heat-supplementing discharge screw device; 301, hot blast furnace; 302, high-temperature flue gas pipeline; 303, heating box body; 304, heating burner; 305, heat exchanger; 4, water-cooled screw discharge device; 5, screw feeding device; 6, buffer bin; 7, feeding bin; 8, solid-gas separation bin. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is described and explained in the following with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0023] The pyrolysis crude carbon black production equipment provided by the present application has the advantages that: Figure 1 The pyrolysis crude carbon black production equipment provided by the present application has the advantages that: Figure 1As shown, the pyrolysis crude carbon black production equipment includes: a pyrolysis reactor 1 having a feed inlet and a slag outlet; a heat-supplementing and slag-discharging screw device 2 connected with the pyrolysis reactor 1 through the slag outlet; a heating device for providing heat required for pyrolysis of the pyrolysis reactor 1 and heat required for carbon black drying treatment of the heat-supplementing and slag-discharging screw device 2, including: a hot blast furnace 301; a mixed combustion chamber connected with one side of the hot blast furnace 301; a high-temperature flue gas pipeline 302 connected with the other side of the hot blast furnace 301 and having a high-temperature flue gas outlet; a heating box 303 sleeved on the pyrolysis reactor 1 and connected with the high-temperature flue gas pipeline 302 through the high-temperature flue gas outlet; and part of the heat-supplementing and slag-discharging screw device 2 intruding into the high-temperature flue gas pipeline 302.

[0024] It should be noted that the main reason for the low toluene transmittance of the pyrolysis carbon black is the influence of the tar-like substances and hydrogen and oxygen groups remaining on the surface of the carbon black, which hinders the transmission of toluene molecules, thereby reducing the toluene transmittance. The toluene transmittance is an important indicator of the quality of carbon black, and a high toluene transmittance means a low content of polycyclic aromatic hydrocarbons in the carbon black, which helps the size and shape of the carbon black particles to affect its filtering effect on toluene. Moderate particle size helps to filter impurities in the toluene solution and improve the light transmission efficiency of toluene. Regularly shaped carbon black particles are better than irregularly shaped ones, as they can more effectively form a filter layer to promote the penetration of toluene. In addition, in the application of rubber products, polycyclic aromatic hydrocarbons are considered to be harmful substances, and many rubber products have restrictions on their content when exported. Therefore, improving the toluene transmittance can make the carbon black more in line with export standards and increase its market competitiveness. At the same time, the toluene transmittance also affects the physical and chemical properties of the carbon black, and the size and shape of the carbon black particles have a significant impact on its toluene transmittance. Moderate particle size and regular shape help to improve the toluene transmittance, thereby improving the filtering performance and application effect of the carbon black. In addition, the functional groups and surface covering agents on the surface of the carbon black also affect its toluene transmittance, thereby affecting its hydrophilicity and covering property. The above pyrolysis crude carbon black production equipment is provided with a heating device, and part of the screw slag-discharging device intrudes into the high-temperature flue gas pipeline 302. The heat in the high-temperature flue gas pipeline 302 is used to dry the carbon black in the screw slag-discharging device, increasing the cracking and deep carbonization process, making the toluene transmittance of the crude carbon black ≥80%, significantly improving the toluene transmittance of the carbon black, and broadening the application of the carbon black.

[0025] In some embodiments, the pyrolysis reactor 1 comprises a first pyrolysis reactor 1 and a second pyrolysis reactor 1 connected in series; the first pyrolysis reactor 1 is arranged close to the feed inlet of the pyrolysis reactor 1, and the second pyrolysis reactor 1 is arranged close to the slag outlet of the pyrolysis reactor 1; the heating box 303 comprises a first heating box 303 sleeved on the first pyrolysis reactor 1 and a second heating box 303 sleeved on the second pyrolysis reactor 1; the high-temperature flue gas outlet comprises a first high-temperature flue gas outlet connecting the first heating box 303 and the high-temperature flue gas pipeline 302, and a second high-temperature flue gas outlet connecting the second heating box 303 and the high-temperature flue gas pipeline 302. Further, the first high-temperature flue gas outlet is arranged close to the hot blast stove 301; the first pyrolysis reactor 1 and the second pyrolysis reactor 1 are connected by flanges. In this way, the heating temperature of the corresponding pyrolysis reactor 1 can be controlled by adjusting the hot air flow of the two heating boxes 303 according to actual needs.

[0026] The pyrolysis reactor 1 is arranged in a clockwise external rotation type horizontally, and the pyrolysis reactor 1 feed connector and the feed screw device are arranged as a dynamic and static sealing device. The material input by the feed screw device enters the left side of the pyrolysis reactor 1, and the pyrolysis reactor 1 is provided with an internal spiral blade. Under the action of the internal spiral blade, the coarse carbon black after pyrolysis is discharged into the solid-gas separation bin 8. The pyrolysis reactor 1 is divided into two sections, i.e. a front section and a rear section, due to different functional areas. The front section of the pyrolysis reactor 1 is wrapped in the front heating box 303 for heating, and the rear section of the pyrolysis reactor 1 is wrapped in the rear heating box 303 for heating. The flue gas outlet of the front heating box 303, the flue gas outlet of the rear heating box 303, and the flue gas outlet outer discharge pipeline are connected to transport the discharged flue gas to the peripheral environmental protection system for treatment.

[0027] Further, the heat-supplementing and slag-discharging screw device 2 comprises a cylinder, a rotating shaft sleeved in the cylinder, a spiral blade sleeved on the rotating shaft, and a transmission member for driving the rotating shaft to rotate; the transmission member is arranged at one end of the cylinder; the other end of the cylinder penetrates into the high-temperature flue gas pipeline 302. The cylinder comprises a first cylinder and a second cylinder connected in communication, and the first cylinder and the second cylinder are connected by flanges. The first cylinder is arranged away from the transmission member and is arranged in the high-temperature flue gas pipeline 302.

[0028] In order to cool and output the treated carbon black, the pyrolysis coarse carbon black production equipment further comprises a water-cooled screw slag-discharging device 4; a discharge port is formed in the side of the first cylinder away from the transmission member, and a discharge pipe is connected to the discharge port and penetrates through the high-temperature flue gas pipeline 302 to be connected to the feed inlet of the water-cooled screw slag-discharging device 4.

[0029] The discharge outlet of the self-blocking slagging screw device is connected with the discharging pipe, the coarse carbon black discharged from the discharge outlet of the discharging pipe is connected with the feeding inlet of the heat-supplementing slagging screw device 2, and the feeding inlet of the heat-supplementing slagging screw device 2 is vertically arranged on the upper portion of the right side cylinder. The screw cylinder of the heat-supplementing slagging screw device 2 is connected with the right side end of the high-temperature flue gas pipeline 302 by means of flanges, the screw cylinder of the heat-supplementing slagging screw device 2 extends into the high-temperature flue gas pipeline 302 to heat and dry the coarse carbon black inside, and the toluene light transmittance of the coarse carbon black can reach more than 80% through the deep carbonization process. The carbon black is treated by drying and drying in the utility model, the physical and chemical indexes such as modulus of 300%, scorching, pH value and toluene light transmittance can be changed, the toluene light transmittance is significantly improved, and the toluene light transmittance of the pyrolysis carbon black has an important influence on the application and performance. The screw cylinder of the heat-supplementing slagging screw device 2 is provided with a rotating shaft, and the rotating shaft is provided with spiral blades. The right side of the heat-supplementing slagging screw device 2 is provided with a driving member, the rotating shaft and the spiral blades are driven to rotate counterclockwise, and the entering coarse carbon black is moved to the left side. The discharge outlet of the heat-supplementing slagging screw device 2 is arranged on the left side lower portion of the screw cylinder and is connected with the feeding inlet of the water-cooling slagging screw device discharge valve. The coarse carbon black after heat-supplementing drying enters the feeding inlet of the water-cooling slagging screw device, the feeding inlet is vertically arranged on the left side upper portion of the cylinder body of the water-cooling slagging screw device, a circulating cooling water jacket is arranged outside the cylinder body, and a driving device is arranged on the right side end of the water-cooling slagging screw device. The cylinder body of the water-cooling slagging screw device is provided with a screw shaft, the screw shaft is provided with spiral blades, and the coarse carbon black is pushed to move to the right side discharge port. The coarse carbon black discharged from the discharge port of the water-cooling slagging screw device enters the coarse carbon black buffer collection tank for storage, the discharge outlet of the coarse carbon black buffer collection tank is arranged on the lower portion of the tank body, a control valve is arranged on the lower portion of the discharge outlet, and the discharged coarse carbon black is conveyed to the next process for deep processing.

[0030] Further, the heating device further comprises a heating burner 304 arranged on the side plate of the hot blast furnace 301 and a heat exchanger 305 connected with the heating burner 304. The device uses the hot blast furnace 301 to provide heat for the pyrolysis reactor 1, the left side of the hot blast furnace 301 is provided with the heat exchanger 305, the main function of the heat exchanger 305 is to introduce the flue gas discharged, heat the cold air fed into the heat exchanger 305, and make the flue gas pass through the shell side and the hot air pass through the pipe side, so as to provide high-temperature air for the heating burner 304, thereby achieving the purpose of energy saving. The left side panel of the hot blast furnace 301 is provided with the heating burner 304, the left side of the hot blast furnace 301 is a mixed combustion chamber, the heating fuel and the superheated air are combusted here, the high-temperature flue gas formed is conveyed to the front outlet of the high-temperature flue gas pipeline 302 and the rear outlet of the high-temperature flue gas pipeline 302 respectively through the high-temperature flue gas pipeline 302, and then is conveyed to the front heating box 303 and the rear heating box 303 respectively through the front outlet of the high-temperature flue gas pipeline 302 and the rear outlet of the high-temperature flue gas pipeline 302 respectively, thereby providing heat for the pyrolysis reactor 1.

[0031] In some embodiments, the pyrolysis crude carbon black production device further comprises a screw feeding device 5 connected to the feeding port of the pyrolysis reactor 1, a buffer bin 6 connected to the feeding port of the screw feeding device 5, and a feeding bin 7 connected to the buffer bin 6.

[0032] The pre-processed rubber sheet after crushing first enters the rubber sheet feeding bin 7, and a level meter is arranged on the upper left side of the rubber sheet feeding bin 7 to interlock with the external rubber sheet conveying device and control the upper material level in the rubber sheet feeding bin 7. In order to preliminarily seal the bin by gravity, a rubber sheet buffer bin 6 is further arranged below the discharging port of the rubber sheet feeding bin 7, and a lower level meter is arranged on the lower left side of the rubber sheet feeding bin 7 to interlock with the feeding screw and control the lower material level in the rubber sheet feeding bin 7. A feeding port sealing gate valve is arranged below the discharging port of the rubber sheet feeding bin 7 to prevent the high-temperature oil vapor in the pyrolysis reactor 1 from leaking out in an abnormal situation. A feeding screw is arranged below the discharging port of the sealing gate valve, and the discharging port of the sealing gate valve is connected to the feeding port of the feeding screw device. A driving device is arranged on the left side of the feeding screw device, the feeding port of the feeding screw device is arranged in the middle of the cylinder, a screw shaft is arranged in the cylinder of the feeding screw device, and screw blades are arranged on the screw shaft. The screw blades push the entering material to the right side and move to the left side front end feeding port before entering the pyrolysis reactor 1.

[0033] In some embodiments, the pyrolysis crude carbon black production device further comprises a solid-gas separation bin 8 connected to the discharging end of the pyrolysis reactor 1, and a self-blocking gas discharge screw device connected to the solid-gas separation bin 8. The heat-replenishing discharge screw device 2 is connected to the discharge port of the pyrolysis reactor 1 through the self-blocking gas discharge screw device. The solid-gas separation bin 8 is dynamically and statically matched with the rear cylinder of the pyrolysis reactor 1, a vertical explosion vent is arranged on the upper part of the top of the solid-gas separation bin 8 to perform emergency discharge in an abnormal situation. A high-temperature oil vapor outlet is arranged on the upper right side of the solid-gas separation bin 8 to transport the separated high-temperature oil vapor to the next condensing system for recovery. An upper level meter and a lower level meter are arranged on the lower left side of the solid-gas separation bin 8 to interlock with the lower self-blocking gas discharge screw device, and the two together control the material level in the solid-gas separation bin 8. The discharging port of the solid-gas separation bin 8 is arranged on the lower part of the bin body, and the discharging connector is connected to the feeding port of the gas-blocking screw discharge device.

[0034] The working process of the above-mentioned pyrolysis crude carbon black production device is as follows:

[0035] The crushed rubber sheet enters the pyrolysis reactor 1 to perform thermal cracking, and the carbon black obtained by thermal cracking is output through the screw discharge device. At the same time, the carbon black is dried by being heated in the high-temperature flue gas pipeline 302 during the conveying process of the screw discharge device.

[0036] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered as within the scope of the present disclosure.

[0037] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it shall not be understood as a limitation on the scope of the present application patent. It should be pointed out that, for ordinary skilled in the art, under the premise of not departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. A pyrolysis crude carbon black production equipment, characterized in that, include: The pyrolysis reactor has a feed inlet and a slag outlet; A heat-replenishing slag discharge spiral device is connected to the pyrolysis reactor through the slag discharge port; Heating device, including: Hot air furnace; A mixing combustion chamber is connected to one side of the hot blast stove; A high-temperature flue gas duct is connected to the other side of the hot air furnace and has a high-temperature flue gas outlet. A heating chamber is fitted outside the pyrolysis reactor and connected to the high-temperature flue gas pipeline through the high-temperature flue gas outlet; Part of the heating and slag discharge spiral device has entered the high-temperature flue gas pipeline.

2. The pyrolysis crude carbon black production equipment according to claim 1, characterized in that, The pyrolysis reactor includes a first pyrolysis reactor and a second pyrolysis reactor connected together; the first pyrolysis reactor is located near the feed inlet of the pyrolysis reactor, and the second pyrolysis reactor is located near the slag outlet of the pyrolysis reactor. The heating chamber includes a first heating chamber fitted outside the first pyrolysis reactor and a second heating chamber fitted outside the second pyrolysis reactor; The high-temperature flue gas outlet includes a first high-temperature flue gas outlet connecting the first heating box and the high-temperature flue gas pipe, and a second high-temperature flue gas outlet connecting the second heating box and the high-temperature flue gas pipe.

3. The pyrolysis crude carbon black production equipment according to claim 2, characterized in that, The first high-temperature flue gas outlet is located near the hot air furnace.

4. The pyrolysis crude carbon black production equipment according to claim 2, characterized in that, The first pyrolysis reactor and the second pyrolysis reactor are connected by a flange.

5. The pyrolysis crude carbon black production equipment according to claim 1, characterized in that, The reheating and slag discharge spiral device includes a cylinder, a rotating shaft sleeved inside the cylinder, and spiral blades sleeved outside the rotating shaft for driving the rotating shaft to rotate; the transmission component is located at one end of the cylinder; the other end of the cylinder extends into the high-temperature flue gas duct.

6. The pyrolysis crude carbon black production equipment according to claim 5, characterized in that, The cylinder includes a first cylinder and a second cylinder that are connected to each other. The first cylinder and the second cylinder are connected by a flange. The first cylinder is located away from the transmission component and is located inside the high-temperature flue gas duct.

7. The pyrolysis crude carbon black production equipment according to claim 6, characterized in that, The pyrolysis crude carbon black production equipment also includes a water-cooled spiral slag discharge device. The first cylinder has a discharge port on its side away from the transmission component. A discharge pipe is connected to the discharge port, and the discharge pipe passes through the high-temperature flue gas pipe and is connected to the inlet of the water-cooled spiral slag discharge device.

8. The pyrolysis crude carbon black production equipment according to claim 1, characterized in that, The heating device also includes a heating burner disposed on the side plate of the hot air furnace, and a heat exchanger connected to the heating burner.

9. The pyrolysis crude carbon black production equipment according to claim 1, characterized in that, The pyrolysis crude carbon black production equipment also includes a screw feeder connected to the feed inlet of the pyrolysis reactor, a buffer silo connected to the feed inlet of the screw feeder, and a feed silo connected to the buffer silo.

10. The pyrolysis crude carbon black production equipment according to claim 1, characterized in that, The pyrolysis crude carbon black production equipment also includes a solid-gas separation chamber connected to the discharge end of the pyrolysis reactor, and a self-blocking gas discharge slag screw device connected to the solid-gas separation chamber. The reheating slag discharge screw device is connected to the slag outlet of the pyrolysis reactor through the self-blocking gas discharge slag screw device.

Images