Wet granulation device for thermal cracking carbon black

Abstract

The utility model provides a thermal cracking carbon black wet granulation device, which belongs to the technical field of thermal cracking carbon black granulation and at least comprises a granulator, and the granulator further comprises a first barrel, a second barrel, a plurality of stirring teeth and a plurality of scraping plates. The first barrel body is vertically arranged; the second barrel is sleeved with the first barrel and is coaxial with the first barrel, a containing space is defined between the first barrel and the second barrel, and the containing space comprises a granulation area, a polishing area and a guide area from top to bottom; the stirring teeth are spirally distributed on the outer surface of the second barrel and fixedly connected with the second barrel, the density of the stirring teeth in the granulation area is smaller than that of the stirring teeth in the polishing area, and the density of the stirring teeth in the polishing area is smaller than that of the stirring teeth in the guide area. The carbon black wet granulation device solves the technical problem that the existing thermal cracking carbon black wet granulation device is non-uniform in granulation, and has the characteristics that carbon black particles obtained by granulation are uniform in granularity, and the prepared particles are high in firmness.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal cracking carbon black granulation, in particular to a thermal cracking carbon black wet granulation device. Background Art

[0002] The pyrolysis of waste tires can form gaseous, liquid, and solid products during the incomplete thermal degradation process. This method can completely pyrolyze waste tires into useful products such as pyrolysis oil, pyrolysis carbon black, and pyrolysis non-condensable gases. Pyrolysis carbon black requires further processing before it can be recycled. Wet carbon black granulation is a commonly used method for treating pyrolysis carbon black. Its principle is as follows: the ground pyrolysis carbon black powder is stirred with an appropriate amount of water in a granulator to granulate it. The wet carbon black particles are then sent to a rotary dryer for drying to remove moisture and become qualified products. The advantages of wet granulation include high particle strength, ease of transportation, and resolution of pollution problems. In addition, the carbon black particles after wet granulation have good dispersibility in rubber and low fine powder content, which makes wet carbon black granulation highly practical and advantageous in industrial applications.

[0003] Chinese patent CN110479185A discloses a novel water gun distribution scheme for a wet granulator. This granulator water gun distribution scheme effectively solves the problems of low qualified finished product rate and high particle breakage rate of wet granulator. Based on the existing granulator, the water gun distribution scheme solves the problems of short material granulation time, uneven and insufficient mixing of the sprayed water mist and the material, low finished product rate and high rework rate by adjusting the water gun distribution position and controlling the water spray volume.

[0004] However, the above-mentioned wet granulator has the problem that the rotation speed at various positions in the granulator barrel is inconsistent. The material rotates slowly at the top due to gravity, and rotates faster at the bottom, resulting in uneven particle size of the formed particles and the powder easily accumulates on the inner wall of the barrel. Utility Model Content

[0005] The details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.

[0006] The utility model provides a pyrolysis carbon black wet granulation device, which solves the technical problem of uneven granulation in existing pyrolysis carbon black wet granulation devices and has the characteristics of uniform carbon black particle size and high fastness of the prepared particles.

[0007] The utility model discloses a thermal cracking carbon black wet granulation device, including a granulator, the granulator further includes a first cylinder, a second cylinder, a plurality of stirring teeth, and a plurality of scraper plates; the first cylinder is vertically arranged, the feed port is arranged on the top side of the first cylinder, and the discharge port is arranged on the bottom side of the first cylinder; the second cylinder is sleeved in the first cylinder and coaxially arranged with the first cylinder, and a accommodating space is defined between the first cylinder and the second cylinder, and the accommodating space includes a granulation area, a polishing area, and a guide area from top to bottom; the stirring teeth are spirally distributed on the outer surface of the second cylinder and are fixedly connected to the second cylinder, the density of the stirring teeth in the granulation area is less than the density of the stirring teeth in the polishing area, and the density of the stirring teeth in the polishing area is less than the density of the stirring teeth in the guide area; the plurality of scraper plates are arranged outside the second cylinder along the same circumferential direction of the second cylinder, and the scraper plates are located in the guide area near the discharge port.

[0008] In some embodiments, the granulator further includes a spiral blade located in the granulation zone, and the spiral blade is spirally arranged outside the second cylinder along the distribution direction of the stirring teeth.

[0009] In some embodiments, the granulator further includes a transmission member for driving the second cylinder to rotate.

[0010] In some embodiments, the granulator further comprises a jacket sleeved on the outside of the first cylinder, a steam inlet for steam entry is provided at the lower portion of the jacket, and a steam outlet for steam discharge is provided at the upper portion of the jacket.

[0011] In some embodiments, a water supply component is further included, and the water supply component further includes a granulation water storage tank and a modifier stirring tank; the outlet of the modifier stirring tank is connected to the inlet of the granulation water storage tank, and an agitator is provided in the modifier stirring tank.

[0012] In some embodiments, the water supply assembly further includes a plurality of nozzles, which are connected to the outlet of the granulation water storage tank via a pipe; the nozzles pass through the side of the first cylinder in a direction perpendicular to the central axis of the first cylinder and are sealed with the first cylinder; the water outlet of the nozzle is located in the accommodating space, and the water outlet direction of the nozzle is parallel to but does not overlap with the stirring teeth.

[0013] In some embodiments, the nozzle passes through the upper end side surface of the first cylinder in a direction perpendicular to the central axis of the first cylinder, and the pipeline is connected to a high-pressure jet pump and a flow control valve.

[0014] In some embodiments, the granulator further includes reinforcing ribs that are spirally sleeved on the outside of the second cylinder along the distribution direction of the stirring teeth and are used to fix the stirring teeth.

[0015] In some embodiments, each of the stirring teeth is fixedly connected to the second cylinder through a corresponding stirring tooth mounting seat; each of the stirring tooth mounting seats is provided with a corresponding thread, and a fixing nut is provided on the thread, and the other end of the fixing nut is fixedly connected to the stirring tooth.

[0016] In some embodiments, a buffer silo connected to the feed port of the first cylinder is further included, and an upper material level meter and a lower material level meter are provided on the buffer silo.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model provides a thermal cracking carbon black wet granulation device. The granulator is vertically arranged and the distribution of the stirring teeth from top to bottom is limited. The carbon black particles can be agglomerated into uniform and regular granular materials. The gaps between the particles are reduced by tightly combining the carbon black particles, thereby improving the density and uniformity of the product, improving the quality of the carbon black product, and increasing the utilization rate of the carbon black. At the same time, due to the effect of gravity during the carbon black granulation process, the particles made are more firm. By arranging a scraper plate before the discharge port of the first cylinder, the accumulation of carbon black particles at the bottom of the accommodating space is effectively avoided, which is conducive to better extraction of the carbon black particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic structural diagram of a thermal cracking carbon black wet granulation device provided in an embodiment of the present utility model;

[0021] Figure 2 A schematic diagram of the partial structure of a granulator provided in an embodiment of the present utility model;

[0022] Figure 3 Another partial structural diagram of the granulator provided by an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the distribution of scraper plates of a granulator provided in an embodiment of the present utility model;

[0024] In the above figures: 101, first cylinder; 102, second cylinder; 103, stirring teeth; 104, scraper; 105, spiral blade; 106, jacket; 107, reinforcing rib; 201, granulation water storage tank; 202, modifier mixing tank; 203, nozzle; 204, high-pressure jet pump; 3, buffer silo. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] The embodiment of the utility model provides a thermal cracking carbon black wet granulation device, Figure 1 Schematic diagram of the structure of the thermal cracking carbon black wet granulation device according to the embodiment of the present invention. Figure 1 As shown, the device at least includes a granulator, which further includes a first cylinder 101, a second cylinder 102, a plurality of stirring teeth 103, and a plurality of scrapers 104; the first cylinder 101 is vertically arranged, the feed port is arranged on the top side of the first cylinder 101, and the discharge port is arranged on the bottom side of the first cylinder 101; the second cylinder 102 is sleeved in the first cylinder 101 and is coaxially arranged with the first cylinder 101, and a accommodating space is defined between the first cylinder 101 and the second cylinder 102, and the accommodating space includes a granulating area, a polishing area, and a guide area from top to bottom; as shown Figure 2 、 3 As shown, the stirring teeth 103 are spirally distributed on the outer surface of the second cylinder 102 and are fixedly connected to the second cylinder 102. The density of the stirring teeth 103 in the granulation area is less than the density of the stirring teeth 103 in the polishing area, and the density of the stirring teeth 103 in the polishing area is less than the density of the stirring teeth 103 in the guide area; Figure 4 As shown, a plurality of scraper plates 104 are provided outside the second cylinder 102 along the same circumferential direction of the second cylinder 102 , and the scraper plates 104 are located on one side of the guide area close to the discharge port.

[0027] The granulator of the thermal cracking carbon black wet granulation device is arranged vertically, and the distribution of the stirring teeth 103 from top to bottom is limited. It can agglomerate the carbon black particles into a uniform and regular granular material. By tightly combining the carbon black particles and reducing the gaps between the particles, the density and uniformity of the product are improved, the quality of the carbon black product is improved, and the utilization rate of the carbon black is increased. At the same time, due to the effect of gravity during the carbon black granulation process, the particles produced are more durable. By arranging a scraper plate 104 before the discharge port of the first cylinder 101, the accumulation of carbon black particles at the bottom of the storage space is effectively avoided, which is conducive to better extraction of the carbon black particles. It should be noted that the vertical carbon black granulator relies on the high-speed rotor to force the material to produce strong shear and convection mixing, and at the same time, the mixed particles are transported into the strong mixing zone by the rotation of the barrel, which greatly improves the mixing ability of the material and meets the requirements of various industries for material uniformity.

[0028] To prevent the powdered carbon black from clogging at the inlet of the first cylinder 101 of the vertical granulator, the granulator further includes a spiral blade 105 located in the granulation zone. The spiral blade 105 is spirally arranged outside the second cylinder 102 along the distribution direction of the stirring teeth 103. The provision of the spiral blade 105 allows the rotation of the material-guiding spiral blade 105 to effectively transport the carbon black into the interior of the vertical granulator, ensuring the continuity and stability of the granulation process. Furthermore, the granulator further includes a transmission member that drives the second cylinder 102 to rotate.

[0029] To heat the incoming granulation powder containing moisture, the granulator further includes a jacket 106 disposed over the first barrel 101. A steam inlet is provided at the lower portion of the jacket 106 for steam entry, and a steam outlet is provided at the upper portion of the jacket 106 for steam exit. Specifically, a steam heating pipe inlet is provided at the lower portion of the left barrel of the vertical granulator. Steam entering the outer jacket 106 of the vertical granulator heats the incoming granulation powder containing moisture. A steam heating outlet pipe is provided at the upper portion of the right barrel of the vertical granulator.

[0030] In some embodiments, a water supply component is also included, and the water supply component further includes a granulation water storage tank 201 and a modifier stirring tank 202; the outlet of the modifier stirring tank 202 is connected to the inlet of the granulation water storage tank 201, and an agitator is provided in the modifier stirring tank 202. The purpose of adding a modifier to the wet thermal cracking carbon black granulation water is mainly to improve the firmness of the carbon black particles and improve their performance in specific applications. A granulation water addition modifier stirring tank 202 is vertically arranged on the upper left side of the granulation water storage tank 201. In order to achieve a better dispersion effect of the modifier added to the granulation water, a driving device is also installed on the upper part of the granulation water additive stirring tank, and the lower part is connected to the granulation water additive agitator. The feed port of the granulation water addition modifier stirring tank is arranged vertically on the upper right side of the tank body. The outlet of the granulation water storage tank 201 is arranged at the lower part of the right head, and a control valve is provided on it to connect with the granulation water high-pressure jet pump 204.

[0031] In some embodiments, the water supply assembly further comprises a plurality of nozzles 203, which are connected to the outlet of the granulation water storage tank 201 via a pipe; the nozzles 203 pass through the side of the first cylinder 101 in a direction perpendicular to the central axis of the first cylinder 101 and are sealed with the first cylinder 101; the water outlet of the nozzle 203 is located in the accommodating space, and the water outlet direction of the nozzle 203 is parallel to but not overlapped with the stirring teeth 103. Furthermore, the nozzles 203 pass through the upper side of the first cylinder 101 in a direction perpendicular to the central axis of the first cylinder 101, and the pipeline is connected to a high-pressure jet pump 204 and a flow control valve. Specifically, four groups of granulation water spray pipes are provided on the upper part of the left cylinder of the vertical granulator, and the granulation water spray pipes are provided with granulation water flexible joint nozzles, and the four groups of granulation water flexible joint nozzles are externally connected to a granulation water flow control valve for controlling the input flow of the granulation water high-pressure jet pump 204. The outlet of the granulation water high-pressure jet pump 204 is provided with a granulation water outlet pipe pressure gauge, and above it is provided with a granulation water outlet pipe electromagnetic flowmeter for controlling the flow rate of the granulation water output, which is connected to the four groups of granulation water spray pipes through the granulation water delivery pipeline.

[0032] In order to improve the overall or local strength and provide a diversion function, the granulator further includes a reinforcing rib 107 which is spirally sleeved on the outside of the second cylinder 102 along the distribution direction of the stirring teeth 103 and is used to fix the stirring teeth 103 .

[0033] In some embodiments, each stirring tooth 103 is fixedly connected to the second cylinder 102 through a corresponding stirring tooth 103 mounting seat; each stirring tooth 103 mounting seat is correspondingly provided with a thread, and a fixing nut is provided on the thread, and the other end of the fixing nut is fixedly connected to the stirring tooth 103. Regarding the stirring tooth 103, specifically, a vertical granulator stirring tooth 103 assembly is provided in the inner cylinder of the vertical granulator, and the mechanical stirring force of high-speed rotation and the air power generated thereby are used to make the fine powder material pass through the stirring teeth 103 with different numbers of turns and quantities in the machine, thereby continuously achieving mixing, granulation, spheroidization, densification and other processes, thereby achieving the purpose of granulation. The stirring tooth 103 cylinder is provided with stirring tooth 103 mounting seats with different numbers and turns along the cylinder curve, and the stirring tooth 103 mounting seats are provided with threads, and the stirring tooth 103 mounting fixing nut is screwed on the upper edge of the thread, and the other end of the fixing nut is fixed to the stirring tooth 103.

[0034] The tank further includes a buffer silo 3 connected to the feed port of the first cylinder 101. The buffer silo 3 is equipped with an upper level gauge and a lower level gauge. After the crude carbon black is ground to meet the requirements, it is transported to the granulation powder buffer silo 3 for storage and waiting. The feed port of the granulation powder buffer silo 3 is vertically arranged in the middle of the tank body. An upper level gauge is installed on the right side of the silo wall of the granulation powder buffer silo 3, which is interlocked with the external feeding device to control the upper material level in the granulation powder buffer silo 3. A lower level gauge is installed on the lower left cone of the granulation powder buffer silo 3, which is interlocked with the sealing discharge valve of the discharge port to control the discharge level in the granulation powder buffer silo 3.

[0035] Regarding the above-mentioned thermal cracking carbon black wet granulation device, the vertical granulator feed port pipe is located on the upper right side of the vertical granulator's inner cylinder. Its material inlet is connected to the feed port of the discharge port sealed discharge valve, and the material outlet is connected to the material inlet of the vertical granulator. The upper end cover of the vertical granulator is provided with an upper bearing mounting bracket, and the upper bearing seat is fixed to the upper bearing mounting bracket. The upper end cover is also provided with a stuffing box filled with sealing packing, and the external part is compressed by the upper shaft seal cover of the vertical granulator to prevent the leakage of the incoming powder. The agitator gear 103 cylinder body is located in the inner cylinder of the vertical granulator. The agitator gear 103 cylinder drive shaft head is located at the upper part of the agitator gear 103 cylinder body. The drive shaft head passes through the sealing stuffing box, the upper shaft seal cover, and the upper bearing seat. The wet-process vertical carbon black granulator's agitator 103 has a scraper plate 104 at the discharge end. This is to effectively collect and process the granulated material during the granulation process. The lower portion of the granulator's barrel is equipped with a connecting end plate and a dust-proof stuffing box. This dust-proof stuffing box is filled with flexible packing and secured with a lower gland to prevent leakage. The shaft head at the feed end of the agitator 103 barrel passes through the stuffing box and then through the lower bearing seat, securing the agitator 103 assembly. A driven pulley is mounted on the feed end of the agitator 103 barrel, which mates with a driving pulley on the drive motor. The vertical granulator is driven by a V-belt. The granulator's material outlet is located at the lower left end of the barrel and connects to the discharge port. The discharged wet carbon black granules are then dried in the dryer, the next process step. A sampling port is located on the right side of the lower cylinder of the vertical granulator. This port is used to monitor and control the material status during the granulation process, ensuring product quality and process control accuracy. To ensure stable operation of the vertical granulator, a fixed bracket is installed on the right side of the cylinder. The fixed bracket is connected to the overall frame of the vertical granulator. The main purpose of the overall frame is to improve the stability of the equipment operation.

[0036] The principle of wet carbon black granulation is that ground pyrolytic carbon black powder is mixed with an appropriate amount of water in a vertical granulator to form granules. The wet carbon black granules are then dried in a rotary dryer to remove moisture and produce qualified products. This process consists of four main stages: degassing, wet granulation, and compaction. In the agitator 103 granulator, powdered carbon black is mixed with water in the granulation water, and the mechanical force of the agitator 103 forms the carbon black granules. This process is minimally affected by the carbon black's structural properties, resulting in highly durable granules. Properties can also be improved by adding modifying additives to the granulation water or by modifying the carbon black during the drying process. Advantages of wet granulation include high granule strength, ease of transportation, and reduced pollution. Furthermore, the wet-granulated carbon black granules have good dispersibility in rubber and low fines content, making wet carbon black granulation highly practical and advantageous in industrial applications.

[0037] Compared with the traditional horizontal granulator, the advantages of the vertical carbon black granulator are mainly reflected in its efficient granulation capacity, improved product quality, controllable particle size, reduced energy consumption, automatic control and powerful mixing ability. Specifically:

[0038] 1. Efficient granulation capacity: The vertical carbon black granulator adopts a special granulation process, which can agglomerate carbon black particles into uniform and regular granular materials, thereby improving the utilization rate of carbon black;

[0039] 2. Improve product quality: By tightly combining carbon black particles and reducing the gaps between particles, the density and uniformity of the product are increased, the quality of carbon black products is improved, and better performance and application characteristics are provided;

[0040] 3. Controllable particle size: By adjusting the process parameters of the granulator and the granulating disc device, the particle size of carbon black particles can be precisely controlled to meet the needs of different application fields;

[0041] 4. Reduce energy consumption: With the advancement of technology, carbon black pelletizers continue to optimize energy efficiency, achieving simultaneous completion of mixing and pelletizing, reducing energy consumption;

[0042] 5. Automatic control: By equipping the above-mentioned devices with an automatic control system, the production process can be made intelligent and automated, which improves production efficiency and reduces manual operation errors.

[0043] 6. Powerful mixing ability: The vertical carbon black granulator relies on the high-speed rotor to force the material to produce strong shear and convection mixing. At the same time, the rotating barrel conveys the mixed particles into the strong mixing zone, which greatly improves the mixing ability of the material and meets the requirements of various industries for material uniformity.

[0044] In summary, the vertical carbon black pelletizer meets the industry's demand for high-quality carbon black products through its efficient, high-quality production capacity and powerful mixing ability, while also improving production efficiency and intelligence.

[0045] The working process of the above-mentioned thermal cracking carbon black wet granulation device is as follows:

[0046] The powdered carbon black enters the containing space enclosed between the first cylinder 101 and the second cylinder 102 through the feed port on one side of the top of the first cylinder 101. Under the stirring of the stirring teeth 103 and the action of gravity, it passes from top to bottom through the granulation area for granulation, the polishing area for compaction and polishing, and the guide area to be guided out of the containing space. The carbon black particles that are easily accumulated at the bottom are stirred and discharged under the action of the scraper plate 104.

[0047] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A thermal cracking carbon black wet granulation device, characterized in that: Comprising a granulator, the granulator further comprising: A first cylinder, wherein the first cylinder is arranged vertically, the feed port is arranged on one side of the top end of the first cylinder, and the discharge port is arranged on one side of the bottom end of the first cylinder; a second cylinder, the second cylinder being sleeved in the first cylinder and coaxially arranged with the first cylinder, defining an accommodation space between the first cylinder and the second cylinder, the accommodation space including a granulation area, a polishing area, and a guide area from top to bottom; a plurality of stirring teeth, the stirring teeth being spirally distributed on the outer surface of the second cylinder and fixedly connected to the second cylinder, the density of the stirring teeth in the granulation zone being smaller than the density of the stirring teeth in the polishing zone, and the density of the stirring teeth in the polishing zone being smaller than the density of the stirring teeth in the guide zone; A plurality of scraper plates are arranged outside the second cylinder along the same circumferential direction of the second cylinder, and the scraper plates are located on a side of the guide area close to the discharge port.

2. The thermal cracking carbon black wet granulation device according to claim 1, characterized in that: The granulator further comprises a spiral blade located in the granulation zone, and the spiral blade is spirally arranged outside the second cylinder along the distribution direction of the stirring teeth.

3. The thermal cracking carbon black wet granulation device according to claim 1, characterized in that: The granulator further comprises a transmission member for driving the second cylinder to rotate.

4. The thermal cracking carbon black wet granulation device according to claim 1, characterized in that: The granulator further comprises a jacket sleeved on the outside of the first cylinder, a steam inlet for steam entry is provided at the lower portion of the jacket, and a steam outlet for steam discharge is provided at the upper portion of the jacket.

5. The thermal cracking carbon black wet granulation device according to claim 1, characterized in that: It also includes a water supply component, which further includes a granulation water storage tank and a modifier stirring tank; the outlet of the modifier stirring tank is connected to the inlet of the granulation water storage tank, and an agitator is provided in the modifier stirring tank.

6. The thermal cracking carbon black wet granulation device according to claim 5, characterized in that: The water supply assembly also includes a plurality of nozzles, which are connected to the outlet of the granulation water storage tank via a pipe; the nozzles pass through the side of the first cylinder in a direction perpendicular to the central axis of the first cylinder and are sealed with the first cylinder; the water outlet of the nozzle is located in the accommodating space, and the water outlet direction of the nozzle is parallel to but not overlapping with the stirring teeth.

7. The thermal cracking carbon black wet granulation device according to claim 6, characterized in that: The nozzle passes through the upper end side surface of the first cylinder along a direction perpendicular to the central axis of the first cylinder, and the pipeline is connected to a high-pressure jet pump and a flow control valve.

8. The thermal cracking carbon black wet granulation device according to claim 1, characterized in that: The granulator further includes a reinforcing rib which is spirally sleeved on the outside of the second cylinder along the distribution direction of the stirring teeth and is used to fix the stirring teeth.

9. The thermal cracking carbon black wet granulation device according to claim 1, characterized in that: Each of the stirring teeth is fixedly connected to the second cylinder through a corresponding stirring tooth mounting seat; each of the stirring tooth mounting seats is correspondingly provided with a thread, and a fixing nut is provided on the thread, and the other end of the fixing nut is fixedly connected to the stirring tooth.

10. The thermal cracking carbon black wet granulation device according to claim 1, characterized in that: It also includes a buffer silo connected to the feed port of the first cylinder, and the buffer silo is provided with an upper material level meter and a lower material level meter.

Images