WO2014067246A1

WO2014067246A1 - Continuous waste-rubber cracking process and equipment therefor

Info

Publication number: WO2014067246A1
Application number: PCT/CN2013/071639
Authority: WO
Inventors: 牛斌; 牛晓璐; 韩国乾; 王新明; 于爱丽
Original assignee: Niu Bin
Priority date: 2012-10-31
Filing date: 2013-02-18
Publication date: 2014-05-08
Also published as: CN103045283A; CN103045283B

Abstract

Provided are a process for continuous cracking of waste rubber and equipment for realizing this process. Firstly, a waste-rubber block is subjected to primary cracking, and then the resulting solid product is directly subjected to secondary cracking, wherein cracking gases generated by the primary cracking and the secondary cracking are vented together. By using the two-stage continuous cracking process and equipment, not only is the yield of oil increased, but the quality of the carbon black is also improved significantly.

Description

Waste rubber continuous cracking process and equipment thereof

Technical field

The invention relates to a continuous cracking process of waste rubber and an apparatus for realizing the same.

Background technique

It is well known that after the cracking of waste rubber, further processing can produce gasoline, diesel, carbon black and other products, which not only handles a large amount of industrial waste such as waste rubber produced by modern society, but also reduces environmental pollution, and solves the increasingly serious energy. The crisis has provided new avenues. At present, although various processes and equipment related to the cracking of waste rubber have been reported, most of them have a high cracking temperature in order to ensure the cracking of the waste rubber, so that the final cracking produces more combustible gas, and the oil is more Less, resulting in low oil yield, although people have made a lot of efforts to improve the oil yield, but the effect is not satisfactory, because it is extremely difficult to increase the oil yield of 1% in the process of waste rubber cracking. In addition, high temperature cracking is also likely to cause coking inside the equipment, shortening the service life and increasing the production energy consumption; if the cracking temperature is lowered, the cracking is not thorough, and the obtained carbon black has more impurities attached, so that the quality of the carbon black is lowered.

Summary of the invention

In view of the above problems, the present invention proposes a continuous cracking process and equipment for waste rubber, which adopts two-stage continuous cracking, which not only improves the oil yield but also significantly improves the quality of carbon black.

The waste rubber continuous cracking process of the present invention comprises the following process: the waste rubber block is first subjected to primary cracking, and the solid product obtained after the primary cracking is directly entered into the secondary cracking process for secondary cracking, and the primary cracking is produced by cracking. The gas is discharged together with the cracked gas produced by the secondary cracking.

In the specific production, the waste rubber is first pretreated by washing, crushing, etc. to form a waste rubber block, which is then sent to the primary cracking process. The scrap rubber block moves under the action of the spiral belt and completes the first stage in the movement. The cracking produces oil and gas as well as solid products. The oil and gas are condensed to form fuel oil and combustible gas. The solid products mainly include carbon black and un-cracked substances and some iron wires.

In the prior art, oil and solid products are still produced after the cracking of the waste rubber, but since the temperature of the cracking is high, the substance that should be turned into oil directly turns into gas, so that the oil produced after the primary cracking is condensed. The proportion of available fuel oil is reduced, and the proportion of combustible gas is increased, resulting in a decrease in the oil yield of the entire cracking process. In the present invention, in order to ensure that this part of the material is not directly cracked into gas and waste, in the case of continuous heating of the external heat source, the temperature of the primary cracking is lowered, and the fraction is lower due to the lower primary cracking temperature. After the substance is cracked, it turns into oil instead of gas. After the first stage cracking, the oil produced by the first stage is condensed, most of which is discharged in the form of fuel oil, and a small amount is discharged in the form of cracked gas, and the oil yield of the whole cracking process is increased. The first-stage cracking temperature adopted by the invention is 380-410 ° C. In addition, since the first-stage cracking temperature is low, the internal coking of the equipment is avoided, the service life of the equipment is prolonged, and the production energy consumption is reduced.

Since the primary cracking temperature is low, the solid product obtained after the primary cracking completion includes both carbon black and uncleared solid matter, and the surface of the carbon black is also attached with heavy fuel oil, and the quality is poor, so the present invention will pass The solid product after primary cracking directly enters the secondary cracking. At the higher cracking temperature, the undecomposed material in the primary cracking process is further cracked into oil and gas, which is discharged together with the oil and gas produced by the primary cracking, and is obtained after condensation. Fuel and combustible, secondary cracking temperature is 450-500 °C.

In combination with the above two-stage cracking process, compared with the prior art first-stage pyrolysis, the proportion of fuel oil in the final cracked product increases, the proportion of combustible gas decreases, and the oil yield increases.

In the present invention, the heat source for heating the primary cracking and the secondary cracking generally adopts the recovered hot air, and the temperature is generally about 550-580 °C. The waste rubber block under room temperature can be heated up to 380-410 ° C faster under the heating of the hot air, and the heating efficiency is high. Since the temperature of the primary cracking is 380-410 ° C, the temperature of the solid product produced after the primary cracking is also about 380-410 ° C, when the solid product having this temperature enters the secondary cracking process, at 550-580 Under the action of the external heat source of °C, the temperature of the surface of the solid product can be easily raised to 450-500 ° C, further cracking is completed, the cracking gas is discharged, and energy is saved. In this process, heavy fuel oil on the surface of the carbon black is also cracked, and the quality of the carbon black is also improved.

Further, in the secondary cracking process of the solid product, water vapor is introduced into the opposite direction of the movement of the solid product, and the water vapor starts at a temperature of about 120 ° C. When it enters the secondary cracking process in the opposite direction and is mixed with the solid product, Not only can the carbon black after the secondary cracking be cooled and discharged, but also react with the sulfur on the surface of the carbon black and remove it. In addition, the heavy fuel on the surface of the carbon black can be carried along the moving direction of the water vapor. The cracker is discharged to a certain extent, which not only makes the final oil yield increase, but also ensures that the sulfur content and the oil content in the carbon black discharged after the secondary cracking are lower, and the final result of the invention is obtained. Carbon black oil content is less than 0.5 % (wt%), far superior to 2-3% (wt%) in the prior art; sulfur content also decreased from greater than 1% (wt%) in the prior art to 0.2-0.3% (wt% ).

In summary, the continuous cracking process of the waste rubber according to the present invention adopts two-stage continuous cracking, which can reduce the combustible gas generated by the cracking while increasing the cracking of the waste rubber, thereby increasing the oil yield and avoiding the oil cracking rate. The internal coking of the equipment prolongs the service life of the equipment and reduces the energy consumption of the production; and the carbon black and the oil content of the carbon black finally produced are low and the quality is high.

In view of the above process requirements, the present invention also designs corresponding production equipment, including a cracking chamber and a heating mechanism disposed outside the cracking chamber, the cracking chamber is divided into a primary cracking chamber and a secondary cracking chamber, and the first cracking chamber is discharged. A sealing head is connected to one end of the material, a secondary cracking chamber is arranged at the lower part of the sealing head, and a feeding port of the secondary cracking silo is correspondingly disposed under the solid product discharging port of the primary cracking silo.

As described in the process, the pre-treated waste rubber block first enters the primary cracking chamber, and the primary cracking is completed by the external heating mechanism. The solid product produced by the primary cracking falls through the solid product outlet of the primary cracking silo. Go to the feed port of the secondary cracking silo and enter the secondary cracking chamber for secondary cracking. The oil and gas produced during the primary cracking process and the oil and gas produced during the secondary cracking process are discharged from the oil and gas outlet on the head. The carbon black produced after the secondary cracking is discharged from the carbon black outlet at the rear of the secondary cracking chamber. The carbon black outlet is provided with a material seal, which can avoid the discharge of carbon black and discharge the oil and gas generated during the secondary cracking process, thereby ensuring that the oil and gas generated in the secondary cracking process can be returned to the first-stage cracking chamber and the oil produced by the same stage cracking together. The discharge of oil and gas also ensures that the cracking chamber is completely isolated from the outside world, avoiding the danger of external gas entering the equipment. In addition, the present invention provides a feed screw throughout the primary cracking chamber or at the end of the primary cracking chamber to prevent solid products from building up prior to entering the secondary cracking chamber.

The external heating structure adopts a hot air chamber, and the recovered hot air can be used to maximize the utilization of resources. Since the temperature in the primary cracking process and the secondary cracking process are different, the hot air chamber is divided into a hot air chamber I and a hot air chamber II; a hot air chamber I is disposed outside the first-stage cracking chamber, and a second-stage cracking chamber is provided. The hot air chamber II, the hot air chamber I and the hot air chamber II are connected by a pipeline, and the hot air chamber II and the flue gas outlet on the head are connected through the flue, so that the temperature of the two-stage cracking chamber can be respectively realized by adjusting the intake air volume. control.

The end of the secondary cracking chamber protrudes from the hot air chamber II, and the water vapor inlet is arranged at the end to ensure that the water vapor is discharged in the opposite direction to the solid product. The two can be reversely mixed to finally remove the sulfur and oil in the carbon black particles. The purpose of quality. The water vapor mixed with the carbon black carries the oily material through the secondary cracking silo feed inlet and the primary cracking silo solid product discharge port, returns to the primary cracking silo and is discharged through the oil and gas outlet, and the solid product is not sufficiently cracked. The secondary cracking is carried out, and the oil and gas is returned to the primary cracking chamber and discharged through the oil and gas outlet. In addition, the water vapor inlet is located outside the hot air chamber II, thereby cooling the carbon black to be discharged from the secondary cracking chamber.

Further, a pair of horizontal baffles disposed symmetrically on both sides of the secondary cracking chamber along the moving direction of the material, and the end of the horizontal baffle along the moving direction of the material is spaced from the end of the heating mechanism outside. Because the solid material after the primary cracking enters the secondary cracking chamber and always runs in the lower part of the secondary cracking chamber, after the baffles are used, the hot smoke first enters from the lower part of the baffle, along the direction of the baffle The secondary cracking chamber is heated, and finally discharged from the end of the baffle plate and the end of the hot air chamber II to the upper portion of the secondary cracking chamber through the flue, thereby uniformly and fully heating the solid material in the secondary cracking chamber. . Since one side of the baffle is connected to the outer wall of the secondary cracking chamber and the other side is connected to the inner wall of the hot air chamber II, when the hot air heats the material in the lower part of the secondary cracking chamber, it can only be from the end of the baffle. The distance between the end of the hot air chamber II and the end of the secondary cracking chamber is discharged through the exhaust port to function as a baffle. In addition, since the baffle is directly connected to the secondary cracking chamber, it can also absorb the heat storage effect, thereby maximizing the utilization of energy.

Further, the inventor may, according to actual needs, set a plurality of baffles in the lower part of the secondary cracking chamber and the baffles on both sides to be the same as the baffles on both sides of the second-stage cracking chamber, so that the hot air is on the material at the bottom of the cracking chamber. The heating is more even and uniform. In order to ensure that the hot air fills the entire hot air chamber II to achieve sufficient uniform heating of the material, it is preferable to set the cross-sectional area at the inlet of the hot air chamber II to the same cross-sectional area at the spacing.

In addition, a scraper is disposed above the feed port of the secondary cracking chamber, and the scraper is coupled to a shaft disposed on the head and extending through the head. The scraper includes a rotating arm attached to an outer side wall of the flue and an arm perpendicular to the rotating arm. In the prior art, when the cracked flue gas runs to the inner wall of the primary cracking chamber adjacent to the sealing head, Since the temperature difference between the inside and the outside is too large, coking is easily generated here, and in the present invention, when the waste rubber is cracked, since the hot air heated by the secondary cracking passes through the flue, the outer side wall of the flue has a certain temperature. Therefore, the inner wall of the cracking chamber is not easy to produce coking, and even if coking occurs, it is easily removed by the rotating arm. Since the waste tire has some extremely soft iron wire in the solid product produced by the primary cracking process, the wire can be transported during the process. Intertwined with each other to enter the secondary cracking process, so the arms can break up the entangled soft iron wire. After the secondary cracking process, the carbon black and its iron wire discharged from the carbon black outlet can be subjected to magnetic separation and the like. Complete separation.

In summary, the present invention adopts a two-stage continuous cracking process and is supplemented by corresponding equipment, and on the basis of ensuring full cracking of the waste rubber, the cracking reaction temperature is lowered, the oil yield and the quality of the carbon black are remarkably improved, and the product is prolonged. The service life of the equipment reduces the energy consumption of the production and has made significant progress.

DRAWINGS

Figure 1 is a schematic structural view of the present invention;

Figure 2 is a view taken along line A-A of Figure 1;

Figure 3 is a B-B arrow view of Figure 1;

Figure 4 is a view taken along line M of Figure 1;

In the figure, 1, primary cracking warehouse, 2, flue gas outlet, 3, oil and gas export, 4, scraper, 5, secondary cracking warehouse, 6, carbon black outlet, 7, water vapor inlet, 8, baffle, 9, secondary cracking silo inlet, 10, hot air chamber I, 11, hot air chamber II, 12, pipeline, 13, flue, 14, head, 15, first-stage cracking silo solid product outlet.

detailed description

Process Example 1

A continuous cracking process of waste rubber, comprising the following process: the pretreated soft rubber block is firstly subjected to primary cracking at 380 ° C, and the oil and gas produced after the primary cracking is discharged from the oil and gas outlet; the solid product obtained by the primary cracking is directly Entering the secondary cracking process for secondary cracking, the temperature of the secondary cracking is 450 °C, the carbon black after the secondary cracking is discharged from the carbon black outlet, and the oil produced by the secondary cracking is returned to the primary cracking chamber again, and the same level The oil and gas produced during the cracking process are discharged together.

Process Example 2

The invention discloses a continuous cracking process of waste rubber, comprising the following process: the pretreated soft rubber block is firstly subjected to primary cracking at 410 ° C, and the oil and gas generated after the primary cracking is discharged from the oil and gas outlet; the solid product obtained by the primary cracking is directly Entering the secondary cracking process for secondary cracking, and in the secondary cracking process of the solid product, water vapor is introduced in the opposite direction of the movement of the solid material, the temperature of the secondary cracking is 500 ° C, and the carbon black after the secondary cracking is from the carbon The black outlet is discharged, the oil produced by the secondary cracking, the gas generated by the reaction between the steam and the sulfur in the carbon black, and the oil on the surface of the carbon black are returned to the primary cracking chamber, and the oil and gas generated in the same stage cracking process are discharged together. .

Process Example 3

The invention discloses a continuous cracking process of waste rubber, which comprises the following process: the pretreated pretreated waste rubber block is firstly subjected to primary cracking at 400 ° C, and the oil and gas generated after the primary cracking is discharged from the oil and gas outlet; the solid product obtained by the primary cracking is directly Entering the secondary cracking process for secondary cracking, and in the secondary cracking process of the solid product, water vapor is introduced in the opposite direction of the movement of the solid material. The temperature of the secondary cracking is 480 ° C, and the carbon black after secondary cracking is carbon. The black outlet is discharged, the gas generated by the secondary cracking, the gas generated by the reaction between the steam and the sulfur in the carbon black, and the oil on the surface of the carbon black are returned to the primary cracking chamber, together with the cracking gas generated in the same stage cracking process. discharge.

Process Example 4

The invention discloses a continuous cracking process of waste rubber, which comprises the following steps: firstly, the waste rubber is pretreated by washing, crushing, etc. to form a waste rubber block, and then sent to a primary cracking process for primary cracking at 390 °C. In this process, the waste rubber block moves under the action of the spiral belt, and completes the primary cracking during the movement to generate oil and gas and solid products. The oil and gas generated after the primary cracking is discharged from the oil and gas outlet, and after the steps such as condensation, Fuel and flammable gas.

The solid product obtained by the primary cracking directly enters the secondary cracking process for secondary cracking. The solid product mainly includes carbon black and uncleared material and part of the iron wire. When entering the secondary cracking process, the iron wire in the solid product is broken up. With other materials, it falls into the secondary cracking chamber for secondary cracking. The temperature of the secondary cracking is 460 °C. In addition, in the secondary cracking process of the solid product, water vapor is introduced in the opposite direction of the movement of the solid material. During the stage cracking process, the undecomposed material in the primary cracking process is further cracked into oil and gas, and the water vapor reacts with the sulfur in the carbon black to generate gas, and the oil on the surface of the carbon black is removed by water vapor carrying, and the carbon black is cooled. . The gas generated by the secondary cracking and the gas generated by the reaction between the steam and the sulfur in the carbon black and the water vapor carrying the oil on the surface of the carbon black are returned to the primary cracking chamber, and the oil and gas generated in the same stage of the cracking process are discharged together. After the steps of condensation and the like, fuel oil and combustible gas are obtained, and the carbon black and the iron wire after the second-stage cracking are cooled and discharged, and are completely separated by magnetic separation and the like to obtain high-quality carbon black.

Equipment Example 1

The utility model relates to a waste rubber continuous cracking device, which comprises a cracking chamber and a heating mechanism disposed outside the cracking chamber, wherein the cracking chamber is divided into a first-stage cracking chamber and a second-stage cracking chamber, and one end of the first-stage cracking chamber is connected with a head. The second part of the head is provided with a secondary cracking silo, and the inlet of the secondary cracking silo is correspondingly arranged under the discharge port of the solid product of the primary cracking silo. Other parts of this embodiment employ the prior art.

Equipment Example 2

The utility model relates to a waste rubber continuous cracking device, which comprises a cracking chamber and a heating mechanism disposed outside the cracking chamber, wherein the cracking chamber is divided into a first-stage cracking chamber and a second-stage cracking chamber, and one end of the first-stage cracking chamber is connected with a head. The second part of the head is provided with a secondary cracking silo, and the inlet of the secondary cracking silo is correspondingly arranged under the discharge port of the solid product of the primary cracking silo. There is also a flue gas outlet and an oil and gas outlet on the head; a carbon black outlet is arranged at the rear of the secondary cracking silo.

Equipment Example 3

The utility model relates to a waste rubber continuous cracking device, which comprises a cracking chamber and a heating mechanism disposed outside the cracking chamber, wherein the cracking chamber is divided into a first-stage cracking chamber and a second-stage cracking chamber, and one end of the first-stage cracking chamber is connected with a head. The second part of the head is provided with a secondary cracking silo, and the inlet of the secondary cracking silo is correspondingly arranged under the discharge port of the solid product of the primary cracking silo. There is also a flue gas outlet and an oil and gas outlet on the head; a carbon black outlet is arranged at the rear of the secondary cracking silo, and a material seal is provided at the carbon black outlet. The external heating mechanism adopts a hot air chamber. The hot air chamber is divided into a hot air chamber I and a hot air chamber II; a hot air chamber I is disposed outside the first stage cracking chamber, and a hot air chamber II is disposed outside the second cracking chamber, and the hot air chamber I and the hot air chamber II are connected by a pipeline, and The hot air chamber II is connected to the flue gas outlet on the head through the flue.

Equipment Example 4

The utility model relates to a waste rubber continuous cracking device, which comprises a cracking chamber and a heating mechanism disposed outside the cracking chamber, wherein the cracking chamber is divided into a first-stage cracking chamber and a second-stage cracking chamber, and one end of the first-stage cracking chamber is connected with a head. The second part of the head is provided with a secondary cracking silo, and the inlet of the secondary cracking silo is correspondingly arranged under the discharge port of the solid product of the primary cracking silo. There is also a flue gas outlet and an oil and gas outlet on the head; a carbon black outlet is arranged at the rear of the secondary cracking silo. The external heating mechanism adopts a hot air chamber. The hot air chamber is divided into a hot air chamber I and a hot air chamber II; a hot air chamber I is disposed outside the first stage cracking chamber, and a hot air chamber II is disposed outside the second cracking chamber, and the hot air chamber I and the hot air chamber II are connected by a pipeline, and The hot air chamber II is connected to the flue gas outlet on the head through the flue. The end of the secondary cracking chamber protrudes from the hot air chamber II, and the water vapor inlet is provided at the end, and the water vapor inlet is located outside the hot air chamber II.

Equipment Example 5

The utility model relates to a waste rubber continuous cracking device, which comprises a cracking chamber and a heating mechanism disposed outside the cracking chamber, wherein the cracking chamber is divided into a first-stage cracking chamber and a second-stage cracking chamber, and one end of the first-stage cracking chamber is connected with a head. The second part of the head is provided with a secondary cracking silo, and the inlet of the secondary cracking silo is correspondingly arranged under the discharge port of the solid product of the primary cracking silo. There is also a flue gas outlet and an oil and gas outlet on the head; a carbon black outlet is arranged at the rear of the secondary cracking silo. The external heating mechanism adopts a hot air chamber. The hot air chamber is divided into a hot air chamber I and a hot air chamber II; a hot air chamber I is disposed outside the first stage cracking chamber, and a hot air chamber II is disposed outside the second cracking chamber, and the hot air chamber I and the hot air chamber II are connected by a pipeline, and The hot air chamber II is connected to the flue gas outlet on the head through the flue. The end of the secondary cracking chamber protrudes from the hot air chamber II, and the water vapor inlet is provided at the end, and the water vapor inlet is located outside the hot air chamber II. A pair of horizontal baffles arranged symmetrically on both sides of the secondary cracking chamber along the moving direction of the material, and the horizontal baffles are spaced apart from the end of the hot air chamber II at the end of the moving direction of the material. The side of the baffle is connected to the outer wall of the secondary cracking chamber, and the other side is connected to the inner wall of the hot air chamber II. The cross-sectional area at the inlet of the hot air chamber II is the same as the cross-sectional area at the spacing.

Equipment Example 6

A waste rubber continuous cracking device comprises a cracking chamber and a heating mechanism disposed outside the cracking chamber, wherein the cracking chamber is divided into a first-stage cracking chamber and a second-stage cracking chamber, and the first-stage cracking chamber is provided with a feeding spiral at the end of the first-stage cracking chamber. A sealing head is connected at one end, a flue gas outlet and an oil and gas outlet are also arranged on the sealing head; a secondary cracking silo is arranged at the lower part of the sealing head, a carbon black outlet is arranged at the rear part of the secondary cracking silo, and the feeding port of the secondary cracking silo corresponds It is set under the discharge port of the solid product of the primary cracking silo.

The external heating mechanism adopts a hot air chamber, which is divided into a hot air chamber I and a hot air chamber II; a hot air chamber I is arranged outside the first stage cracking chamber, and a hot air chamber II is arranged outside the second cracking chamber, and the hot air chamber I and the hot air chamber II pass The pipeline is connected, and the hot air chamber II is connected to the flue gas outlet on the head through the flue.

The end of the secondary cracking chamber protrudes from the hot air chamber II, and the water vapor inlet is provided at the end, and the water vapor inlet is located outside the hot air chamber II. A pair of horizontal baffles arranged symmetrically on both sides of the secondary cracking chamber along the moving direction of the material, and the horizontal baffles are spaced apart from the end of the hot air chamber II at the end of the moving direction of the material. The side of the baffle is connected to the outer wall of the secondary cracking chamber, and the other side is connected to the inner wall of the hot air chamber II. In the second-stage cracking chamber and the lower part of the baffles on both sides, three baffles are provided which are identical to the baffles on both sides of the second-stage cracking chamber and are spaced from the end of the hot air chamber II, and the cross-sectional area of the inlet of the hot air chamber II is The cross-sectional area at the spacing is the same size.

Equipment Example 7

A waste rubber continuous cracking device comprises a cracking chamber and a heating mechanism disposed outside the cracking chamber, wherein the cracking chamber is divided into a first cracking chamber 1 and a second cracking chamber 5, and the first cracking chamber 1 is provided with a feeding spiral A discharge head 14 is connected to one end of the discharge, and a flue gas outlet 2 and an oil and gas outlet 3 are further disposed on the seal head 14; a secondary cracking chamber 5 is disposed at a lower portion of the head 14; and a carbon black outlet is disposed at a rear portion of the second cracking chamber 5 6, and the secondary cracking chamber feed port 9 is correspondingly disposed under the primary cracking silo solid product discharge port 15.

The external heating mechanism adopts a hot air chamber, and is divided into a hot air chamber I10 and a hot air chamber II11; a hot air chamber I10 is disposed outside the first stage cracking chamber 1, and a hot air chamber II11, a hot air chamber I10 and a hot air chamber are disposed outside the second cracking chamber 5. The II 11 is connected by a line 12, and the hot air chamber II11 and the flue gas outlet 2 on the head 14 are connected by a flue 13.

The end of the secondary cracking chamber 2 extends out of the hot air chamber II11, and the water vapor inlet 7 is provided at the end, and the water vapor inlet 7 is located outside the hot air chamber II11. A pair of horizontal baffles 8 disposed symmetrically along the direction of movement of the material on both sides of the secondary cracking chamber 5, and the ends of the horizontal baffles 8 along the direction of movement of the material and the outer end of the hot air chamber II11 are spaced apart. The side of the baffle 8 is connected to the outer wall of the secondary cracking chamber 5, and the other side is connected to the inner wall of the hot air chamber II11.

A scraper 4 is disposed above the feed port 9 of the secondary cracking chamber, and the scraper 4 includes a rotating arm attached to the outer side wall of the flue 13 and an arm perpendicular to the rotating arm.

Claims

1. A continuous cracking process for waste rubber, characterized in that it comprises the following process: the waste rubber block is first subjected to primary cracking, and the solid product obtained after the primary cracking is directly introduced into the secondary cracking process for secondary cracking, The cracked gas produced by the stage cracking is discharged together with the cracked gas produced by the secondary cracking.

2. The continuous cracking process of waste rubber according to claim 1, characterized in that water vapor is introduced into the opposite direction of the movement of the solid product during the secondary cracking of the solid product.

3. The continuous cracking process of waste rubber according to claim 1 or 2, characterized in that the temperature of the primary cracking is 380-410 °C.

The waste rubber continuous cracking process according to claim 1 or 2, characterized in that the temperature of the secondary cracking is 450-500 °C.

5. A waste rubber continuous cracking apparatus comprising a cracking chamber and a heating mechanism disposed outside the cracking chamber, wherein the cracking chamber is divided into a primary cracking chamber (1) and a secondary cracking chamber (5). The first-stage cracking silo (1) is connected with a head (14) at one end of the discharge, a secondary cracking chamber (5) is arranged at the lower part of the head (14), and the feed port (9) of the secondary cracking chamber is correspondingly set at the first stage. The cleavage silo solid product discharge port (15).

6. A waste rubber continuous cracking apparatus according to claim 5, characterized in that: the head (14) is further provided with a flue gas outlet (2) and an oil and gas outlet (3); and a secondary cracking chamber (5) A carbon black outlet (6) is provided at the rear.

7. A waste rubber continuous cracking apparatus according to claim 5, wherein said external heating mechanism employs a hot air chamber.

8. A waste rubber continuous cracking apparatus according to claim 7, wherein said hot air chamber is divided into a hot air chamber I (10) and a hot air chamber II (11); and a primary cracking chamber (1) The hot air chamber I (10) is arranged, and the hot air chamber II (11) is arranged outside the second cracking chamber (5), and the hot air chamber I (10) and the hot air chamber II (11) are connected through the pipeline (12), and the hot air chamber The flue gas outlet (2) on II (11) and the head (14) is connected by a flue (13).

A waste rubber continuous cracking apparatus according to claim 8, characterized in that: the second cracking chamber (5) is provided with a hot air chamber II (11) at the end, and a water vapor inlet (7) is provided at the end, The water vapor inlet (7) is located outside the hot air chamber II (11).

10. A waste rubber continuous cracking apparatus according to claim 8, characterized in that: a pair of horizontal baffles (8) symmetrically arranged on both sides of the secondary cracking chamber (5) along the direction of movement of the material, and horizontal The end of the baffle (8) along the direction of movement of the material is spaced from the end of the outer portion of the hot air chamber II (11).

11. A waste rubber continuous cracking apparatus according to claim 10, wherein one side of said baffle (8) is connected to the outer wall of the secondary cracking chamber (5), and the other side is connected to the hot air chamber II. (11) The inner wall is connected.

12. A waste rubber continuous cracking apparatus according to claim 5, characterized in that a scraper (4) is arranged above the feed port (9) of the secondary cracking chamber.

13. A waste rubber continuous cracking apparatus according to claim 12, wherein said scraper (4) comprises a rotating arm attached to an outer side wall of the flue (13) and an arm perpendicular to the rotating arm .