Device and method for separating carbon black impurities by utilizing waste heat

Abstract

The invention belongs to the technical field of energy recycling, and discloses a device and method for separating carbon black impurities through waste heat, the device comprises a waste heat boiler, a tank body, a heat recovery tower, a filtering device and a waste heat exchanger which are sequentially connected, the tank body is provided with an air inlet and an air outlet, and the device further comprises a crushing assembly arranged in the tank body; the crushing assembly comprises a crushing chamber and a first sieve tray, the crushing chamber is arranged in the tank body, and the first sieve tray is rotationally arranged at the bottom of the crushing chamber; one end of a driving shaft of the crushing head is fixedly connected with the first sieve tray; the output end of the motor is fixedly connected with the driving shaft; the crushing assembly further comprises a sealing plate used for sealing the air outlet. The driving assembly is used for driving the sealing plate to move so as to intermittently seal the air outlet, the crushing assembly further comprises a knocking plate, and the knocking plate is connected with the sealing plate through a supporting rod; the carbon black waste heat recovery device solves the problem that an existing carbon black waste heat recovery device cannot expose large-particle carbon black wrapped ferromagnetic impurities.

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 insufficient air conditions.

[0003] Referring to the background technology of the existing publication (announcement) number CN110976088A, currently in carbon black enterprises, many carbon black products need to use various methods to remove ferromagnetic impurities such as iron filings in carbon black. Ferromagnetic impurities are an important indicator of carbon black detection, and the amount of ferromagnetic impurities directly affects the quality and qualified product rate of carbon black products.

[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 driving motor and a main shaft; it also includes: an upward rotating component arranged at the bottom end of the main shaft; a rotating separation component arranged at the middle position of the main shaft; and a carbon black screening and crushing component 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 component. Carbon black impurities such as iron filings, wall hangings, and block 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 block carbon black cannot be taken away by the fan airflow due to the large centrifugal force, and can only fall along the inner wall after hitting the tank wall. The powdered carbon black has a small centrifugal force and can be taken away by the fan airflow into the air outlet. The purpose of separation is achieved through the rotating separation component.

[0005] The above device uses the principle of wind selection to make carbon black impurities and large carbon black particles fall to the bottom of the tank, but at room temperature and without the effect of an external magnetic field, these impurities are difficult to separate by conventional physical separation methods such as screening or wind selection. In the process of carbon black production, the flue gas of the waste heat boiler contains a large amount of heat, which will also cause energy waste if it is directly discharged. By utilizing the waste heat, carbon black can be further processed, thereby improving energy utilization. Summary of the invention

[0006] The purpose of this scheme 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 the ferromagnetic impurities wrapped in large particles of carbon black.

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

[0008] The principle of this scheme is that 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 described in detail here. The waste heat tail gas generated by the waste heat boiler drives the carbon black in the tank, so that the carbon black is sent to the crushing chamber for crushing, and the high temperature of the waste heat is used to better achieve the crushing and separation of ferromagnetic impurities and carbon black.

[0009] The effect of this solution is that by using waste heat to feed carbon black, the high temperature of the waste heat can be used to make the carbon black particles more fragile, so that they are easier to be crushed into powder during the crushing process. At the same time, the waste heat can increase the thermal expansion between the carbon black particles and the ferromagnetic impurities, making the two easier to separate.

[0010] Further, the crushing assembly comprises: A crushing chamber, wherein the crushing chamber is arranged in the tank body and has an opening at the top; A first sieve plate, the first sieve plate is rotatably disposed at the bottom of the crushing chamber; A crushing head, wherein one end of the driving shaft of the crushing head is fixedly connected to the first screen plate; A motor, wherein the output end of the motor is fixedly connected to the driving shaft.

[0011] The principle and effect of this scheme are as follows: (1) The working principle of the tank in this scheme is to pass the flue gas containing carbon black products from the air inlet into the crushing chamber through the blower, and then the carbon black is sucked out of the tank through the flue gas in the crushing chamber 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 airflow formed by the blower introduced by the air inlet and the exhaust fan connected to the air outlet. 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, while the ferromagnetic impurities are heavy and not easily carried away by the airflow, so they fall to the bottom of the tank. (2) During the production of carbon black, some large particles of carbon black are produced due to fluctuations in process conditions or equipment wear, and 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 it, and separating the impurities from the carbon black. (3) By crushing large particles of carbon black into carbon black powder, 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 sorted 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 due to gravity, thereby improving the purity of the carbon black powder.

[0012] 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, a wedge block is provided in the sieve hole, and the wedge block is connected to a spring.

[0013] The principle and effect of this scheme are as follows: (1) Although the above scheme can crush large carbon black particles into carbon black powder, it will also crush the ferromagnetic impurities mixed therein into smaller particles. Since the volume and mass of small ferromagnetic impurities are relatively small, they are greatly affected by the airflow generated by the exhaust fan, and are easily driven by the airflow to be discharged from the air outlet along with the carbon black powder. Therefore, it is necessary to avoid the discharge of small impurities from the air outlet. (2) This scheme drives the sealing plate to move to the air inlet end of the air outlet through the driving component, thereby blocking the air outlet. Since the air inlet keeps blowing smoke into the crushing chamber, the pressure in the crushing chamber increases, and then the wedge is squeezed 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 to the outside of the mixing chamber through the gap. Since the air outlet is in a blocked state, there is no air extraction in the tank body, only downward blowing, which makes the small ferromagnetic impurities settle to the bottom of the tank body faster. Then the driving assembly drives the sealing plate to reset and move it away from the air outlet. The carbon black powder is then pumped out of the tank through the air outlet, while the magnetic impurities remain at the bottom of the tank. (3) Since the air outlet needs to be sealed, the pressure in the crushing chamber increases, 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 are still 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.

[0014] Furthermore, the driving assembly is a cylinder, and the piston rod of the cylinder is fixedly connected to the sealing plate.

[0015] The principle and effect of this solution are as follows: This is prior art and will not be described in detail here.

[0016] Further, 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, a second hinge point is provided on the support plate, the second hinge point is hinged with a rocker, a guide plate is slidably provided on the inner wall of the tank body, 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, 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 bolts, 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.

[0017] The principle and effect of this scheme are as follows: (1) through the setting of 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 short section with a faster speed on their movement trajectory. The speed at which the free end of the rocker moves toward the first sieve plate is greater than the speed at which the free end moves 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. In addition, since the air inlet continues to blow smoke 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.

[0018] Furthermore, the crushing assembly also includes a knocking plate, which is arranged on the free end of the rocker.

[0019] The principle and effect of this scheme 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 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.

[0020] 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.

[0021] The principle and effect of this scheme are as follows: (1) Due to the van der Waals force between carbon black, carbon black will gather 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, the 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 run 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 arranges 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 adhered 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 adhered to the outer wall of the crushing chamber. (3) In the process of scraping off carbon black, the scraper is also prone to adhere to carbon black, thereby reducing the scraping effect of the scraper in the subsequent process. Since the scraper is arranged at the free end of the support plate, it also has a quick return characteristic during the movement process, so that when the scraper rotates in the quick return area, the carbon black adhered to the scraper is thrown off by a large centrifugal force. (4) After the scraper scrapes off the carbon black, part of the carbon black is only loosened from the inner wall of the tank body and the outer wall of the crushing chamber, but does not fall off. The knocking plate will knock on the first sieve plate and the inner wall of the tank body during reciprocating motion, thereby shaking off the carbon black that has not fallen off the crushing chamber connected to the first sieve plate and the inner wall of the tank body. (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 can only clean the carbon black at the same position on the inner wall of the tank body and the outer wall of the crushing chamber, but cannot clean 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.

[0022] Furthermore, an annular slide groove is provided on the inner wall of the tank body, and one end of the guide plate is fixed in the slide groove.

[0023] The principle and effect of this solution are: this is the existing technology, and the slide groove is fixed on the inner wall of the tank for guiding to provide installation space.

[0024] A method for separating carbon black impurities by utilizing waste heat, comprising applying a device for separating carbon black impurities by utilizing waste heat, comprising the following steps: 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; Step S20: crushing. If the carbon black entering the crushing chamber is carbon black powder, it is directly discharged to the outside of the crushing chamber through the sieve hole and 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; Step S30: Screening, the ferromagnetic impurities fall to the bottom of the tank and are discharged through the discharge hole at the bottom.

[0025] Further, the method further comprises the following steps: 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 body and the outer wall of the crushing chamber, and cleans the carbon black adhered to the scraper when rotating to the quick return area. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a device for separating carbon black impurities using waste heat according to the present invention; Figure 2 It is a schematic diagram of the structure of the crushing assembly of the present invention; Figure 3 is a cross-sectional view of the first sieve tray of the present invention; Figure 4 It is a schematic diagram of the structure of the crushing assembly and the driving assembly of the present invention; Figure 5 The structure of the drive assembly of the present invention is schematically shown in FIG. Figure 1 ; Figure 6 The structure of the drive assembly of the present invention is schematically shown in FIG. Figure 2 ; Figure 7 It is a schematic structural diagram of the sealing plate and the air outlet according to the present invention.

[0027] 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

[0028] The following will clearly and completely describe the concept and technical effects of the present invention in combination with the embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments 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: See also Figure 1 and Figure 2A device for separating carbon black impurities by utilizing waste heat comprises a waste heat boiler, a tank body 1, a heat recovery tower, a filtering 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 pipeline, and the air outlet 12 is connected to an exhaust fan through a pipeline.

[0029] A crushing assembly 2 is arranged 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 arranged in the tank body 1, and the crushing chamber 21 is a crushing chamber 21 with an opening on the top. The first sieve plate 22 is rotatably arranged at the bottom of the crushing chamber 21, and a crushing head 23 is provided on the first sieve plate 22. The driving shaft 24 of the crushing head 23 is fixedly connected to the first sieve plate 22, and the driving shaft 24 is connected to a motor (not shown in the figure).

[0030] 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 carbon black is extracted to the outside of the tank body 1 through the flue gas in the crushing chamber 21 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 are separated by 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 heavy and not easily carried away by the airflow, so they fall to the bottom of the tank body 1 and are discharged through the discharge hole 14 at the bottom.

[0031] See also Figure 2-Figure 7 The crushing assembly 2 further includes a sealing plate 25, which is used to seal the air outlet 12. The crushing assembly 2 further includes a driving assembly 3, which is used to drive the sealing plate 25 to move to intermittently seal the air outlet 12; the sieve hole 221 of the first sieve plate 22 is a wedge-shaped hole, and a wedge block 26 is arranged in the sieve hole 221, and the wedge block 26 is connected to a spring 261. The driving assembly 3 can adopt any existing technology, such as a cylinder or a reciprocating rack, etc.

[0032] 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, and then the wedge 26 is squeezed 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 to the outside 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, only downward air blowing, so that small particles of ferromagnetic impurities settle to the bottom of the tank body 1 faster. Then the driving component 3 drives the sealing plate 25 to reset, so that it is 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 pressure in the crushing chamber 21 increases due to the need to seal the air outlet 12, which causes small particles of impurities to be discharged to the outside of the crushing chamber through the sieve hole 221. Therefore, when the sealing plate 25 does not block the gas outlet 12, the small particles of ferromagnetic impurities are still in the crushing chamber 21 and will not be discharged through the gas outlet 12 together with the carbon black powder when the gas outlet 12 is not sealed.

[0033] See also Figure 2-Figure 7 The driving assembly 3 includes a second sieve plate 31 and a support plate 32. The structure of the second sieve plate 31 is the same as that of the first sieve plate 22, and is also provided with sieve holes 221 and wedges 26. The second sieve plate 31 is coaxially connected to the first sieve plate 22 for rotation. The second sieve plate 31 is fixed in the tank body 1 by a fixed support frame and other structures, so that the second sieve plate 31 is always in a fixed state and will not rotate with the rotation of the first sieve plate 22. The second sieve plate 31 is provided with a first hinge point 311, and the first hinge point 311 is offset from the center of the second sieve plate 31. One end of the support plate 32 is rotatably connected to the first hinge point 311. A second hinge point 321 is provided at the middle position of the support plate 32. The second hinge point 321 is hinged with 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 arranged in the guide groove 341. The first sieve plate 22 is provided with a third hinge point 222, and the third hinge point 222 is offset from the center of the first sieve plate 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 groove 361. The third hinge point 222 is slidably arranged in the limit groove 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.

[0034] Specific working principle: through the second sieve plate 31, the support plate 32, the limit plate 36, the rocker 33 and the guide plate 34 and the first hinge point 311, the second hinge point 321 and the third hinge point 222, when the first sieve plate 22 is driven by the motor to rotate, the support plate 32 and the limit plate 36 both make circular motion with the first hinge point 311 as the center, and the rocker 33 is arranged at one end (free end) of the guide groove 341 to make horizontal reciprocating motion. At the same time, the support plate 32, the limit plate 36 and the rocker 33 also have a quick return characteristic when moving, that is, the support plate 32 and the limit plate 36 have a short section of faster speed on their movement trajectory. The speed at which the free end of the rocker 33 moves toward the first sieve plate 22 is greater than the speed at which the end moves away from the first sieve plate 22. Through the above arrangement, the sealing plate 25 has a faster speed area in its movement trajectory, and 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 continues to blow smoke into the crushing chamber 21, the pressure in the crushing chamber 21 increases rapidly, so that the ferromagnetic particles in the crushing chamber 21 are discharged out of the crushing chamber 21.

[0035] The crushing assembly 2 further includes a knocking plate 28, which is disposed on the free end of the rocker 33. A scraper 35 with a telescopic function is disposed at the free end of the support plate 32, and the scraper 35 cooperates with the inner wall of the tank body 1 and the outer wall of the crushing chamber 21.

[0036] Specific working principle: Since the free end of the rocker 33 has a quick return characteristic, the knocking plate 28 moves faster toward the first sieve plate 22, so that the knocking plate 28 has a greater knocking force, thereby knocking the first sieve plate 22 to produce a greater vibration, so that small particles of impurities pass through the sieve hole 221. The free end of the support plate 32 is provided with a scraper 35. When the scraper 35 contacts the inner wall of the tank body 1, the carbon black adhering to the inner wall of the tank body 1 is scraped off, and when the scraper 35 rotates to contact the outer wall of the crushing chamber 21, the carbon black adhering to the outer wall of the crushing chamber 21 is scraped off. At the same time, since the scraper 35 is provided at the free end of the support plate 32, it also has a quick return characteristic during the movement process, so that when the scraper 35 rotates in the quick return area, the carbon black adhering to the scraper 35 is thrown off by a larger centrifugal force. 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 the maximum stroke, thereby scraping and cleaning the position that could not be cleaned originally.

[0037] In order to better realize 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, including the following steps: 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 to the outside of the crushing chamber 21 through the sieve hole 221 and 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 body 1 and are discharged through the discharge hole 14 at the bottom.

[0038] Further, the method further comprises the following steps: 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.

[0039] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope 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 arranged 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 pipeline, and the air outlet (12) is connected to an exhaust fan via a pipeline, wherein: It also includes a waste heat boiler, a heat recovery tower, a filter device and a waste heat exchanger. The air outlet of the waste heat boiler is connected to the blower through a pipeline, and the air outlet 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.

2. The device for separating carbon black impurities by utilizing waste heat according to claim 1, characterized in that: The crushing assembly (2) comprises: A crushing chamber (21), the crushing chamber (21) being arranged in the tank body (1), and the crushing chamber (21) being a crushing chamber (21) having an opening at the top; 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 driving 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).

3. The device for separating carbon black impurities by utilizing waste heat according to claim 2, characterized in that: The crushing assembly (2) further comprises a sealing plate (25), wherein the sealing plate (25) is used to seal the air outlet (12); and a driving assembly (3), wherein the driving assembly (3) is 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, wherein a wedge block (26) is provided in the sieve hole (221), and the wedge block (26) is connected to a spring (261).

4. The device for separating carbon black impurities by utilizing waste heat according to claim 3, 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).

5. The device for separating carbon black impurities by utilizing waste heat according to claim 3, characterized in that: The driving assembly (3) comprises 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); a second hinge point (321) is provided on the support plate (32); a rocker (33) is hingedly connected to the second hinge point (321); 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 disposed 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 disposed in the limit groove (361) via a bolt; one end of the limit plate (36) is fixedly connected to the support plate (32); a support rod (27) is provided at the free end of the limit plate (36); and the free end of the support rod (27) is connected to the sealing plate (25).

6. The device for separating carbon black impurities by utilizing waste heat according to claim 5, 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).

7. The device for separating carbon black impurities by utilizing waste heat according to claim 6, 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.

8. The device for separating carbon black impurities by utilizing waste heat according to claim 4, 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 fixedly disposed in the sliding groove (13).

9. A method for separating carbon black impurities by utilizing waste heat, comprising applying a device for separating carbon black impurities by utilizing waste heat as claimed in any one of claims 1 to 8, 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 to the outside 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 body (1) and are discharged through the discharge hole (14) at the bottom.

10. A method for separating carbon black impurities by utilizing waste heat according to claim 9, 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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