Device and method for separating carbon black impurities using waste heat

Abstract

The present invention belongs to the technical field of energy recovery and utilization, and discloses a device and method for separating carbon black impurities by utilizing waste heat, the device comprising a waste heat boiler, a tank body, a heat recovery tower, a filter device and a waste heat exchanger connected in sequence, the tank body being provided with an air inlet and an air outlet, and further comprising a crushing assembly arranged in the tank body, the crushing assembly comprising a crushing chamber, the crushing chamber being arranged in the tank body, a first sieve plate, the first sieve plate being rotatably arranged at the bottom of the crushing chamber; a crushing head, one end of the driving shaft of the crushing head being fixedly connected to the first sieve plate; a motor, the output end of the motor being fixedly connected to the driving shaft; the crushing assembly further comprising a sealing plate, the sealing plate being used to seal the air outlet; the driving assembly further comprising a driving assembly, the driving assembly being used to drive the sealing plate to move to intermittently seal the air outlet, the crushing assembly further comprising a knocking plate, the knocking plate being connected to the sealing plate by a support rod; the present invention solves the problem that the existing carbon black waste heat recovery device cannot expose ferromagnetic impurities wrapped in large particles of carbon black.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy recovery and utilization, and specifically relates to a device and method for separating carbon black impurities by utilizing waste heat. Background Art

[0002] Referring to the background technology of a carbon black tail gas waste heat recovery process with the existing publication (announcement) number CN116294658A, carbon black is an amorphous carbon, a light, loose and extremely fine black powder with a very large specific surface area ranging from 10-3000m2 / g. It is a product obtained by incomplete combustion or thermal decomposition of organic matter (natural gas, heavy oil, fuel oil, etc.) under conditions of insufficient air.

[0003] Referring to the background art document CN110976088A, many carbon black manufacturers currently require various methods to remove ferromagnetic impurities such as iron filings from their carbon black products. Ferromagnetic impurities are a key indicator in carbon black testing, and their presence directly impacts the quality and yield of the finished carbon black product.

[0004] Referring to the document with the existing publication (announcement) number CN116060300A, a device for separating carbon black impurities is disclosed, which includes a tank body, a chamber, an air inlet, an air outlet, a drive motor and a main shaft; further comprising: an upward rotating member arranged at the bottom end of the main shaft; a rotating separation member arranged at the middle position of the main shaft; and a carbon black screening and crushing member arranged at the air outlet to achieve secondary separation. The device can achieve the purpose of separating impurities by allowing the main flue gas flow to form a vortex in the tank body through the rotating separation member. Carbon black impurities such as iron filings, wall hangings, and lumpy carbon black are large in volume and heavy in mass. Under the action of high-speed rotation, the large and heavy carbon black impurities and lumpy carbon black cannot be carried away by the fan airflow due to the strong centrifugal force, and can only hit the tank wall and fall along the inner wall. The powdered carbon black has a small centrifugal force and can be carried away by the fan airflow into the air outlet. The purpose of separation is achieved by the rotating separation member.

[0005] The above-mentioned device uses the principle of air separation to cause carbon black impurities and large carbon black particles to fall to the bottom of the tank. However, at room temperature and without the influence of an external magnetic field, these impurities are difficult to separate using conventional physical separation methods such as screening or air separation. During the carbon black production process, the flue gas from the waste heat boiler contains a large amount of heat, which would waste energy if directly discharged. By utilizing this waste heat, the carbon black can be further processed, thereby improving energy efficiency. Summary of the Invention

[0006] The purpose of this solution is to provide a device for separating carbon black impurities using waste heat, so as to solve the problem that the existing carbon black waste heat recovery device cannot expose large particles of carbon black wrapped in ferromagnetic impurities.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a device for separating carbon black impurities by utilizing waste heat, comprising a tank body, a crushing assembly being provided in the tank body, an air inlet and an air outlet being provided in the tank body, the air inlet being connected to a blower through a pipe, and the air outlet being connected to an exhaust fan through a pipe, characterized in that it also comprises a waste heat boiler, a heat recovery tower, a filter device and a waste heat exchanger, the air outlet end of the waste heat boiler being connected to the blower through a pipe, the air outlet end of the exhaust fan being connected to the heat recovery tower through a pipe, and the heat recovery tower, the filter device and the waste heat exchanger being connected in sequence.

[0008] The principle behind this solution is that the waste heat boiler, heat recovery tower, filtration device, and waste heat exchanger all operate on existing technologies and are not detailed here. The waste heat generated by the waste heat boiler drives the carbon black contained in the tank, where it is then transported to the crushing chamber for crushing. The high temperature of the waste heat is then utilized to better separate the ferromagnetic impurities from the carbon black.

[0009] This solution utilizes waste heat to feed carbon black, making the carbon black particles more fragile and easier to break into powder during the crushing process. Furthermore, the waste heat increases the thermal expansion between the carbon black particles and the ferromagnetic impurities, making them easier to separate.

[0010] Furthermore, the crushing assembly includes:

[0011] A crushing chamber, wherein the crushing chamber is provided in the tank body and has an opening at the top;

[0012] a first sieve plate rotatably disposed at the bottom of the crushing chamber;

[0013] A crushing head, wherein one end of the driving shaft of the crushing head is fixedly connected to the first screen plate;

[0014] A motor, wherein the output end of the motor is fixedly connected to the drive shaft.

[0015] The principle and effect of this scheme are as follows: (1) The working principle of the tank body in this scheme is to use a blower to pass the flue gas containing carbon black products from the air inlet into the crushing chamber, and then the flue gas in the crushing chamber is used to extract the carbon black out of the tank body through the exhaust fan. When the motor starts to drive the crushing head to rotate, the large particles of carbon black sent into the crushing chamber are crushed into powder, and the ferromagnetic impurities originally wrapped inside are exposed. Then the powdered carbon black and ferromagnetic impurities are separated by the screening effect of the first sieve plate and the air flow formed by the blower introduced by the air inlet and the exhaust fan connected to the air outlet. Then, due to the light weight of the carbon black powder, it can be carried away by the air flow generated by the exhaust fan and discharged from the air outlet, while the ferromagnetic impurities are not easily carried away by the air flow due to their heavy weight, and thus fall to the bottom of the tank body. (2) During the carbon black production process, some large particles of carbon black are produced due to fluctuations in process conditions or equipment wear. These large particles of carbon black can be crushed into carbon black powder for reuse. However, these large particles of carbon black are easily wrapped or mixed with ferromagnetic impurities during the production process. This solution can crush large particles of carbon black by setting a crushing component in the tank body, thereby exposing the ferromagnetic impurities wrapped in them, and separating the impurities from the carbon black. (3) By crushing large particles of carbon black into carbon black powder, the large particles of carbon black can be recycled for secondary use, avoiding the secondary collection of large particles of carbon black and then crushing and screening steps. (4) The crushed carbon black and ferromagnetic impurities are separated by exhaust fans and blowers. The light carbon black powder can be carried away by the airflow generated by the exhaust fan, while the heavy ferromagnetic impurities fall to the bottom of the tank body due to gravity, thereby improving the purity of the carbon black powder.

[0016] Furthermore, the crushing assembly also includes a sealing plate, which is used to seal the air outlet; it also includes a driving assembly, which is used to drive the sealing plate to move to intermittently seal the air outlet; the sieve hole of the first sieve plate is a wedge-shaped hole, and a wedge block is provided in the sieve hole, and the wedge block is connected to a spring.

[0017] The principle and effect of this solution are as follows: (1) Although the above solution can crush large particles of carbon black into carbon black powder, it will also crush the ferromagnetic impurities mixed therein into smaller particles. Since the volume and mass of small particles of ferromagnetic impurities are relatively small, they are greatly affected by the airflow generated by the exhaust fan, and are therefore easily driven by the airflow and discharged from the air outlet along with the carbon black powder. Therefore, it is necessary to prevent small particles of impurities from being discharged from the air outlet. (2) This solution drives the sealing plate to move to the air inlet end of the air outlet through the drive component, thereby blocking the air outlet. Since the air inlet continuously blows smoke into the crushing chamber, the pressure in the crushing chamber increases, and then squeezes the wedge to compress the spring, resulting in a larger gap between the wedge and the sieve hole, and the ferromagnetic impurities and carbon black powder are discharged outside the mixing chamber through the gap. Since the air outlet is in a blocked state, there is no air extraction in the tank, only downward blowing, which makes the small particles of ferromagnetic impurities settle to the bottom of the tank faster. The drive assembly then drives the sealing plate to reset, moving it away from the air outlet. The carbon black powder is then drawn out of the tank through the air outlet, while the magnetic impurities remain at the bottom of the tank. (3) The need to seal the air outlet increases the pressure inside the crushing chamber, which in turn causes small particles of impurities to be discharged out of the crushing chamber through the sieve holes. Therefore, when the sealing plate does not block the air outlet, small particles of ferromagnetic impurities remain in the crushing chamber and will not be discharged through the air outlet along with the carbon black powder when the air outlet is not sealed.

[0018] Furthermore, the driving assembly is a cylinder, and the piston rod of the cylinder is fixedly connected to the sealing plate.

[0019] The principle and effect of this solution are as follows: This is existing technology and will not be described in detail here.

[0020] Furthermore, the driving assembly includes a second sieve plate and a support plate, the second sieve plate is rotatably connected to the first sieve plate, the second sieve plate is provided with a first hinge point, one end of the support plate is rotatably connected to the first hinge point, the support plate is provided with a second hinge point, the second hinge point is hinged with a rocker, the inner wall of the tank body is slidingly provided with a guide plate, the guide plate is provided with a guide groove, and the free end of the rocker is slidably provided in the guide groove; the first sieve plate is provided with a third hinge point, and the driving assembly also includes a limit plate, the limit plate is provided with a limit groove, the third hinge point is slidably provided in the limit groove by a bolt, one end of the limit plate is fixedly connected to the support plate, the free end of the limit plate is provided with a support rod, and the free end of the support rod is connected to the sealing plate.

[0021] The principle and effect of this solution are as follows: (1) by setting the second sieve plate, the support plate, the limit plate, the rocker and the guide plate as well as the first hinge point, the second hinge point and the third hinge point, when the first sieve plate rotates under the drive of the motor, the support plate and the limit plate both make circular motion with the first hinge point as the center, and the rocker is arranged at one end (free end) of the guide groove to make horizontal reciprocating motion. At the same time, the support plate, the limit plate and the rocker also have a quick return characteristic when moving, that is, the support plate and the limit plate have a faster speed for a short section on their movement trajectory. The speed of the free end of the rocker moving toward the first sieve plate is greater than the speed of the free end moving away from the first sieve plate. (2) Since a sealing plate is provided at the free end of the limit plate through the support rod, there is a relatively fast speed area in the movement trajectory of the sealing plate. When the sealing plate rotates in this area, the sealing plate quickly blocks the air outlet and then moves away from the air outlet. Moreover, since the air inlet continuously blows the flue gas into the crushing chamber, the pressure in the crushing chamber increases rapidly, so that the ferromagnetic particles in the crushing chamber are discharged out of the crushing chamber.

[0022] Furthermore, the crushing assembly also includes a knocking plate, which is arranged on the free end of the rocker.

[0023] The principle and effect of this solution are as follows: (1) Since small particles of ferromagnetic impurities need to be discharged from the sieve holes, the ferromagnetic impurities can be prevented from clogging the sieve holes by vibrating the first sieve plate through the knocking plate. (2) Since the free end of the rocker has a quick return characteristic, the knocking plate moves faster when moving toward the first sieve plate, making the knocking plate have a greater knocking force, thereby knocking the first sieve plate to generate greater vibration, allowing small particles of impurities to pass through the sieve holes.

[0024] Furthermore, a scraper is provided at the free end of the support plate, and the scraper is arranged in cooperation with the inner wall of the tank body and the outer wall of the crushing chamber; and the support plate is a telescopic plate.

[0025] The principle and effect of this scheme are as follows: (1) Due to the van der Waals force between carbon black, carbon black will accumulate on the inner wall of the tank and the outer wall of the crushing chamber. At the same time, due to the static electricity in the carbon black, carbon black will adhere to the inner wall of the tank and the outer wall of the crushing chamber. If the carbon black accumulates too much, it will cause the equipment to operate unstably. At the same time, it is also necessary to recover the carbon black powder to avoid waste. Therefore, it is necessary to clean the carbon black on the inner wall of the tank and the outer wall of the crushing chamber. (2) This scheme is to set a scraper at the free end of the support plate. When the scraper contacts the inner wall of the tank, it scrapes off the carbon black adhering to the inner wall of the tank. When the scraper rotates to contact the outer wall of the crushing chamber, it scrapes off the carbon black adhering to the outer wall of the crushing chamber. (3) In the process of scraping carbon black, the scraper is also prone to adhere to carbon black, thereby reducing the scraper's subsequent scraping effect. Since the scraper is set at the free end of the support plate, it also has a quick return characteristic during movement, so that when the scraper rotates in the quick return area, it uses a large centrifugal force to throw off the carbon black adhering to the scraper. (4) After the scraper scrapes off the carbon black, part of the carbon black is only loosened from the inner wall of the tank and the outer wall of the crushing chamber, and does not fall off. The knocking plate will knock the first sieve plate and the inner wall of the tank during the reciprocating motion, thereby shaking off the carbon black that has not fallen off the crushing chamber and the inner wall of the tank connected to the first sieve plate. (5) Since the rotation center of the support plate is the first hinge point, and the first hinge point is not the rotation center of the first sieve plate, and the second sieve plate has never rotated, the first hinge point has not rotated, resulting in the scraper only being able to clean the carbon black at the same position on the inner wall of the tank and the outer wall of the crushing chamber, but not at other positions. In this solution, since the support plate is a telescopic plate, the scraper uses the large centrifugal force generated by the quick return characteristic to extend the scraper to the maximum stroke, thereby scraping and cleaning the positions that were originally unable to be cleaned.

[0026] Furthermore, an annular sliding groove is provided on the inner wall of the tank body, and one end of the guide plate is fixed in the sliding groove.

[0027] The principle and effect of this solution are: this is an existing technology, and the slide is fixed on the inner wall of the tank to provide installation space for the guide.

[0028] A method for separating carbon black impurities using waste heat, comprising applying a device for separating carbon black impurities using waste heat, comprising the following steps:

[0029] Step S10: supply air, start the blower, exhaust fan and motor, send the carbon black tail gas from the waste heat boiler into the tank, and inject the flue gas into the crushing chamber;

[0030] Step S20: Crushing. If the carbon black entering the crushing chamber is carbon black powder, it is directly discharged out of the crushing chamber through the sieve holes and is sucked away by the exhaust fan. Large particles of carbon black are crushed into carbon black powder by the crushing head in the crushing chamber, and the ferromagnetic impurities wrapped in the large particles of carbon black are exposed.

[0031] Step S30: Screening, ferromagnetic impurities fall to the bottom of the tank and are discharged through the discharge hole at the bottom.

[0032] Furthermore, the method further comprises the following steps:

[0033] Step S40: Cleaning: The first sieve plate rotates circumferentially under the drive of the drive shaft, so that the scraper cleans the attached carbon black along the inner wall of the tank and the outer wall of the crushing chamber, and cleans the carbon black adhered to the scraper when it rotates to the quick return area. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a device for separating carbon black impurities using waste heat according to the present invention;

[0035] Figure 2 It is a structural schematic diagram of the crushing assembly of the present invention;

[0036] Figure 3 is a cross-sectional view of the first sieve tray of the present invention;

[0037] Figure 4 This is a schematic structural diagram of the crushing assembly and the driving assembly of the present invention;

[0038] Figure 5 The structure of the drive assembly of the present invention is schematically shown. Figure 1 ;

[0039] Figure 6 The structure of the drive assembly of the present invention is schematically shown. Figure 2 ;

[0040] Figure 7 It is a structural schematic diagram of the sealing plate and the air outlet according to the present invention.

[0041] The figure marks in the drawings of the specification include: tank body 1, air inlet 11, air outlet 12, chute 13, discharge hole 14, crushing assembly 2, crushing chamber 21, first sieve plate 22, sieve hole 221, third hinge point 222, crushing head 23, drive shaft 24, sealing plate 25, wedge block 26, spring 261, support rod 27, knocking plate 28, drive assembly 3, second sieve plate 31, first hinge point 311, support plate 32, second hinge point 321, rocker 33, guide plate 34, guide groove 341, scraper 35, limit plate 36, limit groove 361. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the concept and technical effects of the present invention in conjunction with the embodiments to fully understand the purpose, features and effects of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention:

[0043] See also Figure 1 and Figure 2 A device for separating carbon black impurities using waste heat includes a waste heat boiler, a tank body 1, a heat recovery tower, a filter device and a waste heat exchanger connected in sequence. The tank body 1 is provided with an air inlet 11 and an air outlet 12. The air inlet 11 is connected to a blower through a pipe, and the air outlet 12 is connected to an exhaust fan through a pipe.

[0044] A crushing assembly 2 is provided in the tank body 1, and the crushing assembly 2 includes a crushing chamber 21 and a first sieve plate 22. The crushing chamber 21 is provided in the tank body 1, and the crushing chamber 21 is a crushing chamber 21 with an opening at the top. The first sieve plate 22 is rotatably provided at the bottom of the crushing chamber 21, and a crushing head 23 is provided on the first sieve plate 22. The drive shaft 24 of the crushing head 23 is fixedly connected to the first sieve plate 22, and the drive shaft 24 is connected to a motor (not shown in the figure).

[0045] Specific working principle: The working principles of the waste heat boiler, heat recovery tower, filter device and waste heat exchanger are all existing technologies and will not be elaborated here. The working principle of the tank body 1 is to pass the flue gas containing carbon black products from the air inlet 11 into the crushing chamber 21 through the blower, and the flue gas in the crushing chamber 21 is used to extract the carbon black to the outside of the tank body 1 through the exhaust fan. When the motor starts to drive the crushing head 23 to rotate, the large particles of carbon black sent into the crushing chamber 21 are crushed so that the large particles of carbon black are crushed into powder, and the ferromagnetic impurities originally wrapped inside are exposed. Then the powdered carbon black and ferromagnetic impurities pass through the screening action of the first sieve plate 22, and the airflow formed by the blower introduced by the air inlet 11 and the exhaust fan connected to the air outlet 12, thereby separating the carbon black powder and ferromagnetic impurities. Furthermore, since the carbon black powder is light in weight, it can be carried away by the airflow generated by the exhaust fan and discharged from the air outlet 12, while the ferromagnetic impurities are heavier and not easily carried away by the airflow, and thus fall to the bottom of the tank body 1 and are discharged through the discharge hole 14 at the bottom.

[0046] See also Figure 2-Figure 7The crushing assembly 2 also includes a sealing plate 25 for sealing the air outlet 12. It also includes a drive assembly 3 for driving the sealing plate 25 to intermittently seal the air outlet 12. The first sieve plate 22 has wedge-shaped sieve holes 221, each of which is provided with a wedge 26 connected to a spring 261. The drive assembly 3 can be implemented using any conventional technology, such as a cylinder or a reciprocating rack.

[0047] Specific working principle: The driving assembly 3 drives the sealing plate 25 to move to the air inlet end of the air outlet 12, thereby blocking the air outlet 12 (see Figure 7 ). Since the air inlet 11 is constantly blowing smoke into the crushing chamber 21, the pressure in the crushing chamber 21 increases, which in turn squeezes the wedge 26 to compress the spring 261, resulting in a larger gap between the wedge 26 and the sieve hole 221, and the ferromagnetic impurities and carbon black powder are discharged out of the mixing chamber through the gap. Since the air outlet 12 is in a blocked state, there is no air extraction in the tank body 1, and only downward blowing, which causes small particles of ferromagnetic impurities to settle to the bottom of the tank body 1 faster. Then the drive assembly 3 drives the sealing plate 25 to reset, moving it away from the air outlet 12, and the carbon black powder is sucked out of the tank body 1 through the air outlet 12, while the magnetic impurities remain at the bottom of the tank body 1. At the same time, the need to seal the air outlet 12 increases the pressure in the crushing chamber 21, which in turn causes small particles of impurities to be discharged out of the crushing chamber through the sieve hole 221. Therefore, when the sealing plate 25 does not block the air outlet 12, small particles of ferromagnetic impurities remain in the crushing chamber 21 and will not be discharged through the air outlet 12 together with the carbon black powder when the air outlet 12 is not sealed.

[0048] See also Figure 2-Figure 7The drive assembly 3 includes a second sieve tray 31 and a support plate 32. The second sieve tray 31 has the same structure as the first sieve tray 22, and is also provided with sieve holes 221 and wedges 26. The second sieve tray 31 is coaxially connected to the first sieve tray 22 for rotation. The second sieve tray 31 is fixed to the tank body 1 by a fixed support frame and other structures, so that the second sieve tray 31 is always fixed and does not rotate with the rotation of the first sieve tray 22. The second sieve tray 31 is provided with a first hinge point 311, and the first hinge point 311 is offset from the center of the second sieve tray 31. One end of the support plate 32 is rotatably connected to the first hinge point 311. A second hinge point 321 is provided in the middle position of the support plate 32. The second hinge point 321 is hinged to a rocker 33. The inner wall of the tank body 1 is provided with an annular slide groove 13. One end of the guide plate 34 is fixed in the slide groove 13. The guide plate 34 is provided with a guide groove 341. The free end of the rocker 33 is slidably provided in the guide groove 341. The first sieve tray 22 is provided with a third hinge point 222, and the third hinge point 222 is offset from the center of the first sieve tray 22, and the centers of the first hinge point 311 and the third hinge point 222 are collinear. The driving assembly 3 also includes a limit plate 36, which has a limit slot 361. The third hinge point 222 is slidably arranged in the limit slot 361 by a bolt. One end of the limit plate 36 is fixedly connected to the support plate 32. The free end of the limit plate 36 is provided with a support rod 27. The free end of the support rod 27 is rotatably connected to the sealing plate 25.

[0049] The specific operating principle is as follows: Through the arrangement of the second sieve tray 31, support plate 32, limit plate 36, rocker 33, and guide plate 34, as well as the first hinge point 311, second hinge point 321, and third hinge point 222, when the first sieve tray 22 rotates under the drive of the motor, the support plate 32 and limit plate 36 both perform circular motion about the first hinge point 311, while the rocker 33, located at one end (the free end) of the guide slot 341, performs horizontal reciprocating motion. Furthermore, the support plate 32, limit plate 36, and rocker 33 exhibit a snap-back characteristic during movement. Specifically, the support plate 32 and limit plate 36 experience a relatively fast speed for a short period along their trajectory. The free end of the rocker 33 moves toward the first sieve tray 22 at a faster speed than it moves away from it. Through the above arrangement, the sealing plate 25 has a relatively fast speed area in its movement trajectory. When the sealing plate 25 rotates in this area, the sealing plate 25 quickly blocks the air outlet 12 and then moves away from the air outlet 12. Since the air inlet 11 continuously blows smoke into the crushing chamber 21, the pressure in the crushing chamber 21 increases rapidly, so that small particles of ferromagnetic impurities in the crushing chamber 21 are discharged out of the crushing chamber 21.

[0050] The crushing assembly 2 further includes a knocking plate 28, which is provided on the free end of the rocker 33. The free end of the support plate 32 is provided with a scraper 35 with a telescopic function, which is provided in cooperation with the inner wall of the tank body 1 and the outer wall of the crushing chamber 21.

[0051] Specific working principle: Because the free end of the rocker 33 has a quick return characteristic, the knocking plate 28 moves faster when moving toward the first sieve plate 22, which makes the knocking plate 28 have a greater knocking force, thereby knocking the first sieve plate 22 to generate greater vibration, allowing small particles of impurities to pass through the sieve holes 221. A scraper 35 is set at the free end of the support plate 32. When the scraper 35 contacts the inner wall of the tank body 1, it scrapes off the carbon black adhering to the inner wall of the tank body 1. When the scraper 35 rotates to contact the outer wall of the crushing chamber 21, it scrapes off the carbon black adhering to the outer wall of the crushing chamber 21. At the same time, because the scraper 35 is set at the free end of the support plate 32, it also has a quick return characteristic during movement. When the scraper 35 rotates in the quick return area, the larger centrifugal force is used to shake off the carbon black adhering to the scraper 35. Furthermore, since the support plate 32 is a telescopic support plate 32, the scraper 35 utilizes the large centrifugal force generated by the quick return characteristic to extend the scraper 35 to its maximum stroke, thereby scraping and cleaning the positions that were originally unable to be cleaned.

[0052] To better implement the above device, the present invention also provides a method for separating carbon black impurities using waste heat, including applying a device for separating carbon black impurities using waste heat, comprising the following steps:

[0053] Step S10: supply air, start the blower, exhaust fan and motor, send the carbon black tail gas from the waste heat boiler into the tank body 1, and inject the flue gas into the crushing chamber 21;

[0054] Step S20: Crushing. If the carbon black entering the crushing chamber 21 is carbon black powder, it is directly discharged out of the crushing chamber 21 through the sieve 221 and is extracted by the exhaust fan. Large carbon black particles are crushed into carbon black powder by the crushing head 23 in the crushing chamber 21, and the ferromagnetic impurities wrapped in the large carbon black particles are exposed.

[0055] Step S30: Screening, the ferromagnetic impurities fall to the bottom of the tank body 1 and are discharged through the discharge hole 14 at the bottom.

[0056] Furthermore, the method further comprises the following steps:

[0057] Step S40: Cleaning. The first sieve plate 22 rotates circumferentially under the drive of the drive shaft 231, so that the scraper 35 cleans the attached carbon black along the inner wall of the tank body 1 and the outer wall of the crushing chamber 21, and cleans the carbon black adhered to the scraper 35 when rotating to the quick return area.

[0058] The above is only an embodiment of the present invention, and the common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A device for separating carbon black impurities by utilizing waste heat, comprising a tank body (1), wherein a crushing assembly (2) is provided in the tank body (1), wherein the tank body (1) is provided with an air inlet (11) and an air outlet (12), wherein the air inlet (11) is connected to a blower via a pipe, and the air outlet (12) is connected to an exhaust fan via a pipe, and wherein: It also includes a waste heat boiler, a heat recovery tower, a filter device and a waste heat exchanger. The outlet end of the waste heat boiler is connected to the blower through a pipeline, and the outlet end of the exhaust fan is connected to the heat recovery tower through a pipeline. The heat recovery tower, the filter device and the waste heat exchanger are connected in sequence. The crushing component (2) includes: A crushing chamber (21), the crushing chamber (21) is provided in the tank body (1), and the crushing chamber (21) is a crushing chamber (21) having an opening at the top; the crushing chamber (21) is in communication with the air inlet (11); a first sieve plate (22), the first sieve plate (22) being rotatably disposed at the bottom of the crushing chamber (21); A crushing head (23), wherein one end of a drive shaft (24) of the crushing head (23) is fixedly connected to the first sieve plate (22); A motor, wherein the output end of the motor is fixedly connected to the drive shaft (24); The crushing assembly (2) further comprises a sealing plate (25), the sealing plate (25) being used to seal the air outlet (12); and a driving assembly (3), the driving assembly (3) being used to drive the sealing plate (25) to move so as to intermittently seal the air outlet (12); the sieve hole (221) of the first sieve plate (22) is a wedge-shaped hole, a wedge block (26) being provided in the sieve hole (221), and the wedge block (26) being connected to a spring (261).

2. The device for separating carbon black impurities by utilizing waste heat according to claim 1, characterized in that: The driving assembly (3) is a cylinder, and the piston rod of the cylinder is fixedly connected to the sealing plate (25).

3. The device for separating carbon black impurities by utilizing waste heat according to claim 1, characterized in that: The driving assembly (3) includes a second sieve plate (31) and a support plate (32). The second sieve plate (31) is rotatably connected to the first sieve plate (22). The second sieve plate (31) is provided with a first hinge point (311). One end of the support plate (32) is rotatably connected to the first hinge point (311). The support plate (32) is provided with a second hinge point (321). The second hinge point (321) is hinged to a rocker (33). A guide plate (34) is fixedly provided on the inner wall of the tank body (1). The guide plate (34) is provided with a guide groove (341). The free end of the rocker (33) is slidably arranged in the guide groove (341); the first sieve plate (22) is provided with a third hinge point (222); the drive assembly (3) further comprises a limit plate (36); the limit plate (36) is provided with a limit groove (361); the third hinge point (222) is slidably arranged in the limit groove (361) via a bolt; one end of the limit plate (36) is fixedly connected to the support plate (32); the free end of the limit plate (36) is provided with a support rod (27); the free end of the support rod (27) is connected to the sealing plate (25).

4. The device for separating carbon black impurities by utilizing waste heat according to claim 3, characterized in that: The crushing assembly (2) further comprises a knocking plate (28), wherein the knocking plate (28) is arranged on the free end of the rocker (33).

5. The device for separating carbon black impurities by utilizing waste heat according to claim 3, characterized in that: A scraper (35) is provided at the free end of the support plate (32), and the scraper (35) is arranged in cooperation with the inner wall of the tank body (1) and the outer wall of the crushing chamber (21); the support plate (32) is a telescopic plate.

6. The device for separating carbon black impurities by utilizing waste heat according to claim 3, characterized in that: An annular sliding groove (13) is provided on the inner wall of the tank body (1), and one end of the guide plate (34) is fixed in the sliding groove (13).

7. A method for separating carbon black impurities by utilizing waste heat, comprising applying the device for separating carbon black impurities by utilizing waste heat according to any one of claims 1 to 6, characterized in that: The steps include: Step S10: supplying air, starting the blower, exhaust fan and motor, supplying the carbon black tail gas from the waste heat boiler into the tank body (1), and injecting the flue gas into the crushing chamber (21); Step S20: Crushing. If the carbon black entering the crushing chamber (21) is carbon black powder, it is directly discharged out of the crushing chamber (21) through the sieve hole (221) and is sucked away by the exhaust fan; large particles of carbon black are crushed into carbon black powder by the crushing head (23) in the crushing chamber (21), and the ferromagnetic impurities wrapped in the large particles of carbon black are exposed; Step S30: Screening, the ferromagnetic impurities fall to the bottom of the tank (1) and are discharged through the discharge hole (14) at the bottom.

8. The method for separating carbon black impurities by utilizing waste heat according to claim 7, characterized in that: The following steps are also included: Step S40: Cleaning: The first sieve plate (22) rotates circumferentially under the drive of the drive shaft (24), so that the scraper (35) cleans the attached carbon black along the inner wall of the tank body (1) and the outer wall of the crushing chamber (21), and cleans the carbon black adhered to the scraper (35) when rotating to the quick return area.

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