Post-treatment system and method for cooling and dedusting carbon black

Abstract

The invention relates to a post-treatment system and method for cooling and dedusting carbon black. The after-treatment system for cooling and dedusting the carbon black comprises an air separator, a fan and an elevator, and an air inlet of the fan is connected with an air outlet of the air separator; the elevator is arranged in the vertical direction, a feeding port is formed in the bottom of the elevator, the elevator is connected with a carbon black outlet of the air separator and used for receiving the carbon black output by the air separator, lifting equipment is arranged in the elevator and used for lifting the carbon black, a discharging port is formed in the side, opposite to the feeding port, of the top of the elevator and used for outputting carbon black products, and a third air supplementing port is formed in the top of the elevator. A tail gas outlet is formed in the position, close to the bottom, of the elevator and located on the same side as the feeding port, the tail gas outlet is connected with an air inlet of the fan, and air flow from top to bottom is formed by forming a third air supplementing port in the top of the elevator and forming the tail gas outlet in the bottom of the elevator. According to the post-treatment system for cooling and dedusting the carbon black, efficient cooling and dedusting of the carbon black can be realized, and the productivity is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon black production processes, and more particularly, to a post-treatment system and method for carbon black cooling and dust removal. Background Art

[0002] Carbon black is a functional material with a very wide range of applications and plays an irreplaceable important role in many fields of the national economy. With the maturity of petroleum refining technology, petroleum-based composite raw materials, as by-products of petroleum processing, have a large output and a wide range of sources, providing a rich raw material source for carbon black production. Petroleum-based carbon black raw materials are rich in sources, and the production line can be directly built in the petroleum refining area, reducing the transportation cost of raw materials. The products are close to the sea, facilitating import and export trade, and forming a more complete petroleum industry chain. At the same time, petroleum-based carbon black can also redevelop and reuse petroleum-based composite raw materials, making chemical enterprises move further towards environmentally friendly enterprises.

[0003] In the production process of petroleum-based carbon black, since petroleum-based composite raw materials are rich in sources, in order to reduce the stockpile of raw materials, it is necessary to adjust the carbon black production parameters to the maximum to improve production capacity. However, in the prior art, as Figure 2 shown, in the production of coal tar-based carbon black, the temperature of the carbon black after drying out of the dryer reaches 250°C, and after mechanical dust removal, screening and transportation by the air classifier 2 and then reaching the elevator 4, it is still 150°C. The nylon bags for accommodating carbon black products can withstand temperatures of about 80 - 90°C. When the material exceeds this temperature and enters the nylon bag, it will affect the service life of the nylon packaging bag. In order to cool the material to a suitable temperature, it is necessary to cool it precisely in the product storage tank 5, such as staying overnight for cooling, and then packaging after cooling. However, when the carbon black stays in the product storage tank 5 for a long time, such long-term stillness will cause phenomena such as carbon black caking, seriously affecting the production efficiency of carbon black. In addition, the dust contained in the carbon black particles will also affect the purity of the carbon black. Figure 2 is a schematic diagram of the prior art carbon black post-treatment system. Moreover, due to the fluctuations in the carbon black post-treatment system, the temperature after drying is too high, and the air classifier alone cannot meet the cooling requirements. If the opening degree of the air classifier fan is too large, the finished carbon black particles will be carried into the reprocessing bag filter, resulting in a reduction in the yield.

[0004] Therefore, there is an urgent need to develop a method for efficiently cooling and removing dust from carbon black during carbon black production. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to achieve efficient carbon black cooling and dust removal after carbon black production.

[0006] To solve the above technical problems, according to one aspect of the present invention, a post-treatment system for carbon black cooling and dust removal is provided, which includes: an air classifier, the air classifier has a carbon black inlet, a carbon black outlet, a first air supply port, and an air outlet. Among them, the air classifier receives the carbon black dried by the dryer through the carbon black inlet, and replenishes air through the first air supply port for mechanical dust removal and screening of the carbon black. Then, the screened carbon black is output through the carbon black outlet provided at the bottom of the air classifier under the action of gravity. The air that receives heat after heat exchange with the carbon black is output through the air outlet provided at the top of the air classifier; a fan, the fan has an air inlet, and the air inlet of the fan is connected to the air outlet for providing power to facilitate the output of air in the air classifier; an elevator, the elevator is arranged vertically, with a feeding port at the bottom, connected to the carbon black outlet of the air classifier for receiving the carbon black output by the air classifier. A lifting device is arranged inside the elevator for lifting the carbon black. An outlet is provided at the top of the elevator on the side opposite to the feeding port for outputting the carbon black product. Among them, a third air supply port is provided at the top of the elevator, and a tail gas outlet is provided near the bottom of the elevator on the same side as the feeding port. The tail gas outlet is connected to the air inlet of the fan.

[0007] According to an embodiment of the present invention, the post-treatment system for carbon black cooling and dust removal may further include: a second air supply port, the second air supply port is connected to the air inlet of the fan, and the air outlet of the air classifier, the tail gas outlet of the elevator, and the second air supply port are connected in parallel to the air inlet of the fan.

[0008] According to an embodiment of the present invention, the post-treatment system for carbon black cooling and dust removal may further include: a first valve, a first valve is provided on the first air supply port for controlling the air inlet speed of the air classifier.

[0009] According to an embodiment of the present invention, the post-treatment system for carbon black cooling and dust removal may further include: a second valve, a second valve is provided on the second air supply port.

[0010] According to an embodiment of the present invention, the post-treatment system for carbon black cooling and dust removal may further include: a third valve, a third valve is provided between the air outlet of the air classifier and the air inlet of the fan.

[0011] According to an embodiment of the present invention, the post-treatment system for carbon black cooling and dust removal may further include: a fourth valve, a fourth valve is provided between the tail gas outlet of the elevator and the air inlet of the fan. Among them, the air flow is adjusted through the second valve, the third valve, and the fourth valve to realize the air circulation in the air classifier, the fan, and the elevator, which not only plays a role in material classification in the air classifier and avoids the material from being brought into the fan, but also can achieve the effects of cooling and dust removal in the elevator.

[0012] According to an embodiment of the present invention, the post-treatment system for carbon black cooling and dust removal may further include: a fifth valve, a fifth valve is provided on the third air supply port for controlling the air inlet speed of the elevator.

[0013] According to an embodiment of the present invention, the post-treatment system for carbon black cooling and dust removal may further include: a reprocessing bag filter, which is connected to the carbon black inlet of the air classifier through a dryer and is used for inputting carbon black materials; wherein, the reprocessing bag filter is provided with a flue gas inlet and an exhaust port, and the flue gas inlet is connected to a blower to realize heat exchange between the input carbon black materials and the flue gas to be discharged.

[0014] According to an embodiment of the present invention, the post-treatment system for carbon black cooling and dust removal may further include: a product storage tank, which is arranged at the discharge port of the elevator and is used for receiving and storing the carbon black materials output by the elevator.

[0015] According to another aspect of the present invention, there is provided a post-treatment method for carbon black cooling and dust removal, which is implemented based on the above post-treatment system for carbon black cooling and dust removal. The post-treatment method for carbon black cooling and dust removal includes: cooling down, realizing material cooling by the air flowing from the third air supply port of the elevator to the tail gas outlet. There is heat transfer inside the elevator, including: the carbon black materials directly transferring heat to the cold air and the hopper, the hopper transferring heat to the cold air, and the elevator transferring heat to the natural environment; the flue gas after heat exchange enters the blower through the tail gas outlet of the elevator; dust removal and classification, since the materials in the elevator have different particle sizes, densities and weights, by the air flowing from the third air supply port of the elevator to the tail gas outlet, some dust particles in the elevator will move along with the gas and be carried out of the elevator by the air flow, playing a role in dust removal.

[0016] Compared with the prior art, the technical solutions provided by the embodiments of the present invention can at least achieve the following beneficial effects:

[0017] According to the post-treatment system and method for carbon black cooling and dust removal of the present invention, by setting a third air supply port at the top of the elevator and a tail gas outlet at the bottom, an air flow from top to bottom is formed. Due to the different specific gravities of different particles, some dust particles in the elevator will move along with the gas and be carried out of the elevator by the air flow, playing a role in dust removal. Therefore, during transportation, some dust with a smaller specific gravity can be separated from the carbon black particles by using the air flow, increasing the purity of the carbon black and realizing dust removal and classification.

[0018] According to the post-treatment system and method for carbon black cooling and dust removal of the present invention, it can realize the cooling of carbon black materials in the elevator. There is heat transfer inside the elevator: the carbon black materials directly transfer heat to the cold air and the hopper; the hopper transfers heat to the cold air; the elevator transfers heat to the natural environment. The flue gas after heat exchange enters the blower through the tail gas outlet of the elevator.

[0019] For the post-treatment system and method for carbon black cooling and dust removal according to the present invention, a second air supply opening is added to the main pipeline of the air inlet fan, and this air supply opening can increase the control flow rate. At the same time, the flow rate is adjusted by the valve opening. When the air volume provided by the third air supply opening is insufficient and the cooling effect cannot meet the production requirements, the second valve can be adjusted to select an appropriate flow rate. And with the rich raw materials of petroleum-based carbon black, the carbon black production capacity can be maximized. At this time, the pipeline transportation bears more pressure. When the pipeline may be blocked due to the accumulation of attachments or material blockage, the flow rate can be increased by adjusting the second valve to reduce the pipeline transportation pressure; the air flow rate is adjusted through the second valve, the third valve, and the fourth valve to realize the air circulation and balance in the air classifier, the air inlet fan, and the elevator.

[0020] For the post-treatment system for carbon black cooling and dust removal according to the present invention, the elevator is connected in parallel to the system, and the air volume of the air classifier can be adjusted to ensure that the air classifier operates under appropriate working conditions, realizing air cooling and temperature reduction, and separating powder particles.

[0021] For the post-treatment system for carbon black cooling and dust removal according to the present invention, the carbon black material in the elevator before entering the finished product tank can be secondarily separated. Among them, mechanical transportation will cause particle breakage. At the same time, since the height of the elevator is generally more than 15 meters, the longer the cooling length, the better the heat dissipation effect.

[0022] For the post-treatment system for carbon black cooling and dust removal according to the present invention, a supplementary air inlet is added to the inlet of the air classifier fan, which is in parallel with the supplementary air inlets of the air classifier and the elevator, and can complement each other well to effectively adjust the powder particles.

[0023] For the post-treatment system and method for carbon black cooling and dust removal according to the present invention, it has a significant effect especially in solving the problems of rich raw materials, maximized production capacity, and too high temperature of high-quality petroleum-based carbon black particles after the dryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0025] Figure 1 It is a schematic diagram of a carbon black production device after implementing the post-treatment system for carbon black cooling and dust removal according to the embodiments of the present invention;

[0026] Figure 2 It is a schematic diagram of a carbon black post-treatment system of the prior art. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0028] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The terms "first", "second", and similar terms used in the specification and claims of this patent application of the present invention do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "a" or "one" do not denote a quantity limitation, but indicate the existence of at least one.

[0029] Figure 1 It is a schematic diagram of a carbon black production device after a post-treatment system for carbon black cooling and dust removal according to an embodiment of the present invention is implemented.

[0030] As Figure 1 shown, the post-treatment system for carbon black cooling and dust removal includes: an air classifier 2, a blower 3, and an elevator 4.

[0031] The air classifier 2 has a carbon black inlet, a carbon black outlet, a first air supply port, and an air outlet. Among them, the air classifier 2 receives the carbon black dried by the dryer through the carbon black inlet, supplements air through the first air supply port for mechanical dust removal and screening of the carbon black. Then, the screened carbon black is output through the carbon black outlet provided at the bottom of the air classifier 2 under the action of gravity, and the air that receives heat after heat exchange with the carbon black is output through the air outlet provided at the top of the air classifier 2.

[0032] The blower 3 has an air inlet, and the air inlet of the blower 3 is connected to the air outlet to provide power to facilitate the output of air in the air classifier 2.

[0033] The elevator 4 is arranged in the vertical direction, with a feeding port provided at the bottom and is connected to the carbon black outlet of the air classifier 2 for receiving the carbon black output by the air classifier 2. A lifting device is arranged inside the elevator 4 for lifting the carbon black. An outlet is provided at the top of the elevator 4 on the side opposite to the feeding port for outputting the carbon black product.

[0034] Among them, a third air supply port is provided at the top of the elevator 4, and an exhaust gas outlet is provided near the bottom of the elevator 4 on the same side as the feeding port. The exhaust gas outlet is connected to the air inlet of the blower 3.

[0035] According to the post-treatment system for carbon black cooling and dust removal of the present invention, by setting a third air supply port at the top of the elevator 4 and a tail gas outlet at the bottom, an air flow from top to bottom is formed. Due to the different specific gravities of different particles, some dust particles in the elevator 4 will move along with the gas movement and be carried out of the elevator 4 by the air flow, playing a role in dust removal. Therefore, during transportation, some dust with a smaller specific gravity can be separated from the carbon black particles by the air flow, increasing the purity of the carbon black and achieving dust removal and classification. At the same time, it can realize the cooling of the carbon black material in the elevator 4. There is heat transfer inside the elevator 4: the carbon black material directly transfers heat to the cold air and the hopper; the hopper transfers heat to the cold air; the elevator 4 transfers heat to the natural environment. The flue gas after heat exchange enters the fan 3 through the tail gas outlet of the elevator 4.

[0036] According to the post-treatment system for carbon black cooling and dust removal of the present invention, the elevator is connected in parallel to the system, which can adjust the air volume of the air separator to ensure that the air separator operates under appropriate working conditions, realizing air cooling and temperature reduction, and separating powder particles.

[0037] According to the post-treatment system for carbon black cooling and dust removal of the present invention, it can perform secondary separation on the carbon black material in the elevator before entering the finished product tank. Among them, mechanical transportation will cause particle breakage. At the same time, since the height of the elevator is generally more than 15 meters, the longer the cooling length, the better the heat dissipation effect.

[0038] According to one or some embodiments of the present invention, the post-treatment system for carbon black cooling and dust removal further includes: a second air supply port. The second air supply port is connected to the air inlet of the fan 3, and the air outlet of the air separator 2, the tail gas outlet of the elevator 4, and the second air supply port are connected in parallel to the air inlet of the fan 3.

[0039] According to one or some embodiments of the present invention, the post-treatment system for carbon black cooling and dust removal further includes: a first valve. A first valve is provided on the first air supply port for controlling the air inlet speed of the air separator 2.

[0040] According to one or some embodiments of the present invention, the post-treatment system for carbon black cooling and dust removal further includes: a second valve. A second valve is provided on the second air supply port.

[0041] According to one or some embodiments of the present invention, the post-treatment system for carbon black cooling and dust removal further includes: a third valve. A third valve is provided between the air outlet of the air separator 2 and the air inlet of the fan 3.

[0042] According to one or some embodiments of the present invention, the post-treatment system for carbon black cooling and dust removal further includes: a fourth valve. A fourth valve is provided between the tail gas outlet of the elevator 4 and the air inlet of the fan 3. Among them, the air flow is adjusted through the second valve, the third valve, and the fourth valve to realize the air circulation in the air classifier 2, the fan 3, and the elevator 4, which not only plays the role of material classification in the air classifier 2 and avoids the material from being carried into the fan 3, but also can play the role of cooling and dust removal in the elevator 4.

[0043] During production, the air flow rate entering the air classifier is controlled by adjusting the opening degree of the second valve. The larger the flow rate, the greater the flow velocity, and the stronger the cooling effect; the smaller the flow rate, the smaller the flow velocity, and the weaker the cooling effect. However, if the flow velocity is too large, the material is more likely to be carried into the fan; if the flow velocity is too small, the cooling effect is weaker. Therefore, it is necessary to find a balance point by adjusting the second valve, the third valve, and the fourth valve so that the circulation can play both the classification role and the cooling effect.

[0044] According to the post-treatment system for carbon black cooling and dust removal of the present invention, a supplementary air inlet is added to the inlet of the air separation fan, which forms a parallel connection with the supplementary air inlets of the air classifier and the elevator, can complement each other well, and effectively adjust the powder particles.

[0045] According to the post-treatment system and method for carbon black cooling and dust removal of the present invention, a second supplementary air inlet is added to the main pipeline where the fan 3 is connected. This supplementary air inlet can increase the control of the flow rate. At the same time, the flow rate is adjusted by the opening degree of the valve. When the air volume provided by the third supplementary air inlet is insufficient and the cooling effect cannot meet the production requirements, the second valve can be adjusted to select an appropriate flow rate. And with the rich raw materials of petroleum-based carbon black, the carbon black production capacity can be maximized. At this time, the pipeline transportation bears more pressure. When the pipeline is blocked due to the accumulation of attachments or materials, the flow rate can be increased by adjusting the second valve to reduce the transportation pressure of the pipeline; the air flow is adjusted through the second valve, the third valve, and the fourth valve to realize the air circulation and balance in the air classifier 2, the fan 3, and the elevator 4.

[0046] According to one or some embodiments of the present invention, the post-treatment system for carbon black cooling and dust removal further includes: a fifth valve. A fifth valve is provided on the third supplementary air inlet for controlling the air inlet speed of the elevator 4.

[0047] According to one or some embodiments of the present invention, the post-treatment system for carbon black cooling and dust removal further includes: a reprocessing bag filter 1. The carbon black inlet of the air classifier is connected through a dryer for inputting carbon black materials; among them, the reprocessing bag filter 1 is provided with a flue gas inlet and an exhaust port, and the flue gas inlet is connected to the fan 3 to realize the heat exchange between the input carbon black materials and the flue gas to be discharged.

[0048] According to one or some embodiments of the present invention, the post-treatment system for carbon black cooling and dust removal further includes: a product storage tank 5. The product storage tank 5 is arranged at the discharge port of the elevator 4 and is used to receive and store the carbon black material output by the elevator 4.

[0049] According to another aspect of the present invention, there is provided a post-treatment method for carbon black cooling and dust removal, which is implemented based on the above-mentioned post-treatment system for carbon black cooling and dust removal. The post-treatment method for carbon black cooling and dust removal includes: cooling and dust removal classification.

[0050] Cooling: Through the third air supply port of the elevator 4, the air flows towards the tail gas outlet, realizing the cooling of the material. There is heat transfer inside the elevator 4, including: the carbon black material directly transferring heat to the cold air, the hopper transferring heat to the cold air, and the elevator 4 transferring heat to the natural environment; the flue gas after heat exchange enters the fan 3 through the tail gas outlet of the elevator 4.

[0051] Dust removal classification: Since the materials in the elevator 4 have different particle sizes, densities, and weights, through the air flow from the third air supply port of the elevator 4 towards the tail gas outlet, some dust particles in the elevator 4 will move along with the gas and be carried out of the elevator 4 by the air flow, playing the role of dust removal.

[0052] The present invention is easy to implement based on the prior art. As Figure 2 shown, at the top of the elevator, the dust suction port is changed to the third air supply port, and the fifth valve is installed to introduce cold air; at the bottom of the elevator, a tail gas outlet is added, the tail gas outlet is connected to the fan 3, and the fourth valve is installed; a second air supply port is added and the second valve is installed to connect to the fan 3. This structure is connected in parallel to the main air conveying system, and the structure is clear and simple. It can be used not only in the production of petroleum-based carbon black with rich raw materials, but also in the post-treatment process of carbon black production from other raw material systems such as coal tar.

[0053] According to the post-treatment system and method for carbon black cooling and dust removal of the present invention, it has remarkable effects especially in solving the problems of rich raw materials, maximizing production capacity, and the excessively high temperature of high-quality petroleum-based carbon black particles after the dryer.

[0054] The above description is only an exemplary embodiment of the present invention and is not used to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A post-processing system for cooling and dust removal of carbon black, wherein: include: A wind selector, the wind selector having a carbon black inlet, a carbon black outlet, a first air supply port and an air outlet, wherein the wind selector receives the carbon black dried by the dryer through the carbon black inlet, and supplies air through the first air supply port to mechanically remove dust and screen the carbon black, and then the screened carbon black is output through the carbon black outlet arranged at the bottom of the wind selector under the action of gravity, and the air receiving heat after heat exchange with the carbon black is output through the air outlet arranged at the top of the wind selector; A fan, the fan having an air inlet, the air inlet of the fan being connected to the air outlet, for providing power to facilitate the output of air in the air selector; The elevator is arranged in a vertical direction, and a feed port is arranged at the bottom, which is connected to the carbon black outlet of the air selector and is used to receive the carbon black output by the air selector. A lifting device is arranged inside the elevator to lift the carbon black. A discharge port is arranged at the top of the elevator and on the side opposite to the feed port to output the carbon black product. Wherein, a third air supply port is arranged at the top of the elevator, and an exhaust gas outlet is arranged near the bottom of the elevator and on the same side as the feed port. Wherein, the exhaust gas outlet is connected to the air inlet of the fan.

2. The post-processing system for cooling and dust removal of carbon black according to claim 1, wherein: Also includes: The second air supply port is connected to the air inlet of the fan, and the air outlet of the air selector, the exhaust outlet of the elevator, and the second air supply port are connected in parallel to the air inlet of the fan.

3. The post-processing system for cooling and dust removal of carbon black according to claim 2, wherein: Also includes: A first valve is provided on the first air supply port, and is used to control the air entering speed of the air selector.

4. The post-processing system for cooling and dust removal of carbon black according to claim 3, wherein: Also includes: A second valve is provided on the second air supply port.

5. The post-processing system for cooling and dust removal of carbon black according to claim 4, wherein: Also includes: A third valve is provided between the air outlet of the air selector and the air inlet of the fan.

6. The post-processing system for cooling and dust removal of carbon black according to claim 5, wherein: Also includes: A fourth valve is arranged between the exhaust gas outlet of the elevator and the air inlet of the fan, wherein the air flow is adjusted by the second valve, the third valve and the fourth valve to realize air circulation in the air selector, the fan and the elevator, which not only plays the role of classifying materials in the air selector and preventing materials from being brought into the fan, but also has the effect of cooling and dust removal in the elevator.

7. The post-processing system for cooling and dust removal of carbon black according to claim 6, wherein: Also includes: A fifth valve is provided on the third air supply port, and is used to control the air intake speed of the lifting machine.

8. The post-processing system for cooling and dust removal of carbon black according to claim 1, wherein: Also includes: The reprocessing bag filter is connected to the carbon black inlet of the air separator through a dryer and is used to input carbon black materials; wherein the reprocessing bag filter is provided with a smoke inlet and a discharge port, and the smoke inlet is connected to the fan to realize heat exchange between the input carbon black material and the smoke to be discharged.

9. The post-processing system for cooling and dust removal of carbon black according to claim 1, wherein: Also includes: A product storage tank is arranged at the discharge port of the elevator and is used to receive and store the carbon black material output by the elevator.

10. A post-processing method for cooling and dust removal of carbon black, the method being implemented based on the post-processing system for cooling and dust removal of carbon black according to any one of claims 1 to 9, the post-processing method for cooling and dust removal of carbon black comprising: Cooling and cooling, the air flows from the third air supply port of the elevator to the exhaust outlet to achieve material cooling. The heat transfer inside the elevator includes: the carbon black material directly transfers heat to the cold air and the hopper, the hopper transfers heat to the cold air, and the elevator transfers heat to the natural environment; the flue gas after heat exchange enters the fan through the exhaust outlet of the elevator; Dust removal and classification: the materials in the elevator have different particle sizes, densities and weights. The air flows from the third air supply port of the elevator to the exhaust gas outlet. Some dust particles in the elevator will move with the gas and be carried out of the elevator by the airflow, thus achieving the purpose of dust removal.

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