Drying device for carbon black production

Abstract

The utility model discloses a drying device for carbon black production, which comprises a spiral auger conveyor, a preheating tank and a vibrated fluidized bed dryer which are communicated, the spiral auger conveyor is provided with spiral conveying blades, and air outlets of all sections of the vibrated fluidized bed dryer are communicated with a cyclone separator. A gas outlet of the cyclone separator is sequentially communicated with a bag-type dust collector and an induced draft fan; a solid outlet of the cyclone separator and a material outlet of the vibrated fluidized bed dryer are communicated with a product storage tank; a gas outlet of the bag-type dust collector is communicated with the preheating tank; a gas distribution plate is arranged at a gas inlet of the bag-type dust collector, and a plurality of gas inlet holes are uniformly formed in the gas distribution plate and are not arranged in parallel. According to the device, steam is in full contact with carbon black particles, the drying efficiency is greatly improved, waste heat in the drying process is recycled, and the drying cost of the carbon black is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of carbon black production, and particularly relates to a drying device for carbon black production. BACKGROUND

[0002] Carbon black is a black powder generated by the incomplete combustion or pyrolysis of hydrocarbons through a series of chemical reactions. It is widely used in industries such as tires, plastics, inks, and coatings, primarily as a reinforcing agent, pigment, and conductive agent. The production process of carbon black typically includes pyrolysis of raw materials, washing of gases, and drying in later stages. In the final product of carbon black, the moisture content must be controlled within a very low range to ensure its performance and storage stability. This requires the use of an efficient drying device for drying wet carbon black. The drying device needs to have good thermal efficiency and drying uniformity, capable of quickly removing moisture from carbon black without changing its physical and chemical properties. Traditional drying devices not only have poor drying efficiency, but also consume a lot of energy. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a drying device for carbon black production, which allows steam to fully contact with carbon black particles, greatly improves drying efficiency, and recycles waste heat in the drying process, reducing the drying cost of carbon black.

[0004] To solve the above technical problems, the technical scheme of the utility model is:

[0005] A drying device for carbon black production, comprising a communicating screw auger conveyor, a preheating tank, and a vibrating fluidized bed dryer. The screw auger conveyor is provided with screw conveying blades. The gas outlets of each section of the vibrating fluidized bed dryer are connected to a cyclone separator. The gas outlet of the cyclone separator is connected to a bag-type dust collector and an induced draft fan in sequence. The solid outlet of the cyclone separator and the material outlet of the vibrating fluidized bed dryer are both connected to a product storage tank. The gas outlet of the bag-type dust collector is connected to the preheating tank. A gas distribution plate is provided at the gas inlet of the bag-type dust collector. The gas distribution plate is uniformly provided with a plurality of gas inlets that are non-parallelly arranged.

[0006] Preferably, the inner wall of the screw auger conveyor is provided with first crushing teeth.

[0007] Preferably, the gas outlet and the gas inlet of the bag-type dust collector are respectively provided with a first pressure sensor and a second pressure sensor.

[0008] Preferably, the cloth bag of the cloth bag dust collector is communicated with a back blowing device, the back blowing device comprises a back blowing pipe and a gas storage tank communicated with the back blowing pipe; the back blowing pipe is provided with a gas blowing port facing the cloth bag, and the back blowing pipe is further provided with an electromagnetic pulse valve, which is connected with the first pressure sensor and the second pressure sensor.

[0009] Preferably, the preheating tank is provided with a spiral coil pipe, and the gas inlet of the spiral coil pipe is communicated with the gas outlet of the cloth bag dust collector.

[0010] Preferably, the preheating tank is provided with a stirring device, the stirring device comprises a stirring shaft arranged in the preheating tank and a stirring motor arranged at the top of the preheating tank and driving the stirring shaft to rotate, and a plurality of stirring blades are arranged on the stirring shaft.

[0011] Preferably, the plurality of stirring blades are arranged non-parallelly.

[0012] Preferably, the inner wall of the preheating tank is provided with second crushing teeth.

[0013] Thanks to the above technical scheme, the present application has at least the following advantages:

[0014] The utility model discloses a drying device for carbon black production, including the spiral auger conveyor of intercommunication, preheating tank, vibration fluidized bed dryer, and the spiral auger conveyor is equipped with spiral conveying blade, and the gas outlet of vibration fluidized bed dryer section all intercommunicates cyclone separator, and the gas outlet of cyclone separator communicates bag filter, induced draft fan in proper order;The solid outlet of cyclone separator and the material outlet of vibration fluidized bed dryer all intercommunicate product storage tank;The gas outlet of bag filter communicates preheating tank;The air distribution plate is equipped at the gas inlet of bag filter, and the air distribution plate is uniformly provided with a plurality of air inlets, and the plurality of air inlets are arranged non-parallelly. Based on the above setting, the carbon black material is conveyed through the spiral auger conveyor, and the spiral conveying blade is used for uniform stirring and conveying of the material, and the uniformity of the material in the subsequent treatment is ensured. Before the material enters the vibration fluidized bed dryer, the carbon black material is preheated through the preheating tank, the moisture content of the material is reduced, the drying process is prepared, and the drying efficiency is improved. The gas generated in the drying process of the vibration fluidized bed dryer is separated through the cyclone separator, not only the carbon black material entrained in the gas is recovered, but also the gas is further dusted through the bag filter and then preheated in the preheating tank, the waste heat is reused, and the energy consumption is reduced.

[0015] The first crushing tooth can preliminarily crush the particles in the process of material conveying, ensure that the material is more uniform, and thus improve the efficiency of subsequent processing. Moreover, through the crushing of the material, the accumulation and agglomeration of the material can be reduced, the problem of blockage that can occur in the conveying process can be reduced, and the smoothness of conveying is maintained. In addition, after the material is crushed, the contact area with the heat source can be increased, which helps to improve the heat transfer efficiency in the preheating or drying process.

[0016] The first pressure sensor and the second pressure sensor are respectively arranged at the gas outlet and the gas inlet of the bag-type dust collector. The bag of the bag-type dust collector is communicated with a back blowing device, and the back blowing device comprises a back blowing pipe and a gas storage tank communicated with the back blowing pipe. The back blowing pipe is provided with a gas blowing port facing the bag, and an electromagnetic pulse valve is further arranged on the back blowing pipe. The electromagnetic pulse valve is arranged in interlocking connection with the first pressure sensor and the second pressure sensor. The first pressure sensor monitors the pressure of the gas inlet, and the second pressure sensor monitors the pressure of the gas outlet, so as to monitor the pressure difference between the gas inlet and the gas outlet in real time. When the pressure difference of the bag is detected to be abnormal, the external control system automatically opens the electromagnetic pulse valve, so as to open the back blowing device and blow back the bag, remove the accumulated dust, improve the dust removal efficiency, and prolong the service life of the bag.

[0017] The preheating tank is provided with a spiral coil pipe, and the gas outlet of the bag-type dust collector is communicated with the gas inlet of the spiral coil pipe. The gas discharged by the bag-type dust collector enters the spiral coil pipe to preheat the carbon black material in the preheating tank, so that the energy consumption is reduced.

[0018] The preheating tank is provided with a second crushing tooth on the inner wall, which can further refine the material entering the preheating tank, so that the material can uniformly and rapidly absorb heat in the heating process, and the overall heat efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 is a structural schematic view of the embodiment 1 of the present application;

[0021] Figure 2 is Figure 1 an enlarged structural schematic view of A in the embodiment 1 of the present application;

[0022] Figure 3 isFigure 1 Enlarged structure schematic view at B;

[0023] In the figure, 1, spiral auger conveyor; 2, preheating tank; 3, vibration fluidized bed dryer; 4, spiral conveying blade; 5, cyclone separator; 6, bag dust collector; 7, induced draft fan; 8, air distribution plate; 9, air inlet hole; 10, first crushing tooth; 11, first pressure sensor; 12, second pressure sensor; 13, back flushing pipe; 14, gas storage tank; 15, air blowing port; 16, electromagnetic pulse valve; 17, spiral coil; 18, stirring shaft; 19, stirring motor; 20, stirring blade; 21, second crushing tooth; 22, product storage tank. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model

[0025] Embodiment 1

[0026] With reference to Figures 1-3 As shown in the figure, a drying device for carbon black production, including the communication spiral auger conveyor 1, preheating tank 2, vibration fluidized bed dryer 3, the spiral auger conveyor 1 is equipped with spiral conveying blade 4, the gas outlet of vibration fluidized bed dryer 3 each section is communicated cyclone separator 5, the gas outlet of cyclone separator 5 is sequentially communicated bag dust collector 6, induced draft fan 7;The solid outlet of cyclone separator 5 and the material outlet of vibration fluidized bed dryer 3 are all communicated product storage tank 22;The gas outlet of bag dust collector 6 is communicated with preheating tank 2;The air inlet of bag dust collector 6 is equipped with air distribution plate 8, the air distribution plate 8 is uniformly equipped with multiple air inlet holes 9, multiple air inlet holes 9 are not parallelly arranged.

[0027] In the technical scheme, the screw auger conveyor 1 effectively conveys the carbon black material into the preheating tank 2 through the screw conveying blades 4 in the screw auger conveyor 1, thereby ensuring the stability and continuity of the material in the conveying process. The preheating tank 2 preheats the carbon black material to increase the temperature of the carbon black material, which is beneficial to the subsequent drying process, and the preheated material is more easily dried to the ideal drying effect in the vibrating fluidized bed dryer 3. Moreover, the gas outlet of the bag-type dust collector 6 is communicated with the preheating tank 2, so that the gas subjected to the dust removal treatment is recycled for the preheating process, thereby saving energy and reducing environmental pollution. The gas outlets of the vibrating fluidized bed dryer 3 are all connected with the cyclone separator 5, so that the gas and the particles generated in the drying process can be effectively separated. The bag-type dust collector 6 further purifies the gas, thereby ensuring that the gas discharged into the atmosphere meets the environmental protection standard. In addition, the gas distribution plate 8 arranged in the bag-type dust collector 6 ensures that the gas is uniformly distributed, thereby improving the dust removal efficiency.

[0028] Further, in the embodiment, the first crushing teeth 10 are arranged on the inner wall of the screw auger conveyor 1. During the conveying of the carbon black material, the first crushing teeth 10 on the inner wall of the screw auger conveyor 1 shear and grind the material to some extent, so that the material particles are more uniform and fine, the wet material is prevented from being agglomerated, and the efficiency of the subsequent preheating and drying steps is improved.

[0029] Further, in the embodiment, the first pressure sensor 11 and the second pressure sensor 12 are arranged at the gas outlet and the gas inlet of the bag-type dust collector 6, respectively. The first pressure sensor 11 and the second pressure sensor 12 are used to monitor the pressures at the gas inlet and the gas outlet of the bag-type dust collector 6 in real time, so that when the bag of the bag-type dust collector 6 is blocked, the bag-type dust collector 6 can be processed in time.

[0030] Further, in the embodiment, the bag of the bag-type dust collector 6 is communicated with a back-blowing device, the back-blowing device comprises a back-blowing pipe 13 and a gas storage tank 14 communicated with the back-blowing pipe 13, the back-blowing pipe 13 is provided with a gas blowing port 15 facing the bag, and the back-blowing pipe 13 is further provided with an electromagnetic pulse valve 16, the electromagnetic pulse valve 16 is connected with the first pressure sensor 11 and the second pressure sensor 12. In the arrangement, the first pressure sensor 11 is used to monitor the pressure at the gas outlet of the bag-type dust collector 6, and the second pressure sensor 12 is used to monitor the pressure at the gas inlet of the bag-type dust collector 6. When the pressure difference between the first pressure sensor 11 and the second pressure sensor 12 is greater than a set value, an external control system (not shown in the figure) automatically opens the electromagnetic pulse valve 16, thereby opening the back-blowing device to blow gas into the bag, and the accumulated dust on the outer wall of the bag is cleaned.

[0031] Further, in the embodiment, the preheating tank 2 is provided with a spiral coil 17, and the gas inlet of the spiral coil 17 is communicated with the gas outlet of the bag-type dust collector 6. The spiral coil 17 is arranged to make the gas flow spirally in the preheating tank 2, thereby increasing the contact area and contact time of the gas and the material, and improving the heat transfer efficiency and the preheating efficiency.

[0032] Further, in the embodiment, the preheating tank 2 is provided with a stirring device, which comprises a stirring shaft 18 arranged in the preheating tank 2, a stirring motor 19 arranged at the top of the preheating tank 2 and driving the stirring shaft 18 to rotate, and a plurality of stirring blades 20 arranged on the stirring shaft 18 in a non-parallel manner. Under the combined action of the stirring shaft 18 and the stirring blades 20, the carbon black material in the preheating tank 2 is fully mixed and preheated, thereby avoiding the quality reduction of the material caused by local overheating. The stirring blades 20 arranged in a non-parallel manner can generate complex fluid dynamics effects, such as shear force and vortex, during rotation, which helps to accelerate the heat transfer speed in the material, thereby improving the preheating efficiency.

[0033] Further, in the embodiment, the inner wall of the preheating tank 2 is provided with second crushing teeth 21. During the preheating of the carbon black material, the second crushing teeth 21 crush and grind the material to a certain extent, so that the material particles are more fine and uniform, which helps to improve the subsequent drying and the product quality. Moreover, the fine particles have a larger specific surface area, which can absorb heat faster, thereby improving the preheating efficiency.

[0034] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drying device for carbon black production, characterized by: The device comprises a spiral auger conveyor, a preheating tank, and a vibrating fluidized bed dryer, the spiral auger conveyor is provided with spiral conveying blades, the gas outlets of each section of the vibrating fluidized bed dryer are connected with cyclone separators, the gas outlets of the cyclone separators are connected with a bag-type dust collector and an induced draft fan in sequence, the solid outlets of the cyclone separators and the material outlets of the vibrating fluidized bed dryer are connected with a product storage tank, the gas outlet of the bag-type dust collector is connected with the preheating tank, a gas distribution plate is arranged at the gas inlet of the bag-type dust collector, a plurality of gas inlets are uniformly arranged on the gas distribution plate, and the plurality of gas inlets are arranged in a non-parallel manner.

2. The drying device for carbon black production according to claim 1, characterized in that: First crushing teeth are arranged on the inner wall of the spiral auger conveyor.

3. The drying device for carbon black production according to claim 1, characterized in that: First and second pressure sensors are arranged at the gas outlet and the gas inlet of the bag-type dust collector respectively.

4. The drying device for carbon black production according to claim 3, characterized in that: A back-blowing device is connected with the bag of the bag-type dust collector, the back-blowing device comprises a back-blowing pipe and a gas storage tank connected with the back-blowing pipe, a gas blowing port is arranged on the back-blowing pipe and faces the bag, an electromagnetic pulse valve is further arranged on the back-blowing pipe, and the electromagnetic pulse valve is connected with the first and second pressure sensors in a interlocked manner.

5. The drying device for carbon black production according to claim 1, characterized in that: A spiral coil pipe is arranged in the preheating tank, and the gas inlet of the spiral coil pipe is connected with the gas outlet of the bag-type dust collector.

6. The drying device for carbon black production according to claim 1, characterized in that: A stirring device is arranged in the preheating tank, the stirring device comprises a stirring shaft arranged in the preheating tank and a stirring motor arranged at the top of the preheating tank and driving the stirring shaft to rotate, and a plurality of stirring blades are arranged on the stirring shaft.

7. The drying device for carbon black production according to claim 6, characterized in that: The plurality of stirring blades are arranged in a non-parallel manner.

8. The drying device for carbon black production according to claim 1, characterized in that: Second crushing teeth are arranged on the inner wall of the preheating tank.

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