Carbon black decoking device and carbon black production system

Abstract

The utility model relates to the technical field of carbon black preparation, in particular to a carbon black decoking device and a carbon black production system.The carbon black decoking device comprises a discharging valve, a pulverizer, an auxiliary decoking tank, a replacement pipeline, an exhaust pipeline, a filter, a discharging valve, a discharging pipeline and a stock bin, and the discharging valve is arranged at the outlet end of the decoking tank of a cracking device; the crusher is arranged below the outlet end of the decoking tank; the auxiliary decoking tank is arranged below the crusher; the replacement pipeline is communicated with the auxiliary decoking tank, and the filter is communicated with the auxiliary decoking tank through an exhaust pipeline; the stock bin is communicated with a discharge hole of the auxiliary decoking tank through a discharge pipeline; and the discharge valve is arranged at the discharge hole of the auxiliary decoking tank. Therefore, by utilizing the device, the decoking and recycling operation of the carbon black can be realized, the manpower is reduced, the working efficiency is improved, the safety of workers is ensured, the quality of the carbon black is greatly improved, the carbon black can be recycled, and the yield of the carbon black is greatly improved.

Description

Carbon black decoking device and carbon black production system Technical Field

[0001] This application relates to the field of carbon black preparation technology, and in particular to a carbon black decoking device and a carbon black production system. Background Technology

[0002] Acetylene black is produced by high-temperature pyrolysis of acetylene gas. However, incomplete pyrolysis of acetylene will produce coke lumps on the side wall of the pyrolysis furnace, which will be mixed into the carbon black and reduce the quality of the carbon black. Therefore, a coke remover needs to be installed in the pipeline for transporting carbon black in acetylene pyrolysis to remove the coke lumps produced by incomplete pyrolysis. Currently, the coke lumps collected in the coke remover need to be manually opened on-site at regular intervals to discharge the carbon black coke lumps. However, manual operation of the coke remover has the following problems: (1) manual operation is inefficient; (2) the temperature of the carbon black coke lumps is too high, and the operator may be burned when discharging the coke lumps; (3) carbon black production is a closed production process, and air will enter during the coke removal process, which will directly affect the quality of carbon black production during this period; (4) during the carbon black production stage, manually opening the coke remover will also release the hydrogen gas produced by pyrolysis, which may cause an explosion; (5) after the carbon black coke lumps are discharged, they will be disposed of as waste, and the recycling rate of carbon black products mixed in the coke lumps is low. Summary of the Invention

[0003] The purpose of this application is to provide a carbon black decoking device and a carbon black production system, which to a certain extent solves the technical problems in the prior art where carbon black decoking is mostly done manually, which poses safety risks and affects the quality of carbon black. Furthermore, carbon black is disposed of as waste after discharge, resulting in a low recycling rate of carbon black products.

[0004] This application provides a carbon black decoking device for use in a pyrolysis unit. The carbon black decoking device includes: a discharge valve, a pulverizer, an auxiliary decoking tank, a displacement pipeline, an exhaust pipeline, a filter, an emission valve, a discharge pipeline, and a silo. The discharge valve is located at the outlet end of the decoking tank of the pyrolysis unit and is used to control the opening or closing of the outlet end of the decoking tank. The pulverizer is located below the outlet end of the decoking tank and is used to receive and pulverize the carbon black lumps discharged from the decoking tank. The auxiliary decoking tank is located below the pulverizer and is used to receive the pulverized carbon black discharged from the pulverizer.

[0005] The displacement pipeline is connected to the auxiliary coke removal tank, and the filter is connected to the auxiliary coke removal tank through the exhaust pipeline. The displacement pipeline is used to introduce inert gas into the auxiliary coke removal tank, and the inert gas can purge the combustible gas in the auxiliary coke removal tank into the discharge pipeline, and then enter the filter through the discharge pipeline. The filter is used to separate the carbon black from the combustible gas. The silo is connected to the outlet of the auxiliary coke removal tank through the discharge pipeline, and is used to store the qualified carbon black discharged from the auxiliary coke removal tank in the silo. The discharge valve is set at the outlet of the auxiliary coke removal tank and is used to control the opening or closing of the outlet of the auxiliary coke removal tank.

[0006] In the above technical solution, the carbon black decoking device further includes an induced draft fan, and the discharge pipeline passes through the induced draft fan. The induced draft fan is used to draw the qualified carbon black discharged from the auxiliary decoking tank into the silo.

[0007] In any of the above technical solutions, the carbon black decoking device further includes a displacement valve, and the displacement pipeline passes through the displacement valve, and the displacement valve is used to control the opening or closing of the displacement pipeline.

[0008] In any of the above technical solutions, the carbon black decoking device further includes a gas analyzer, and the detection end of the gas analyzer is connected to the exhaust pipe, and the gas analyzer is used to detect whether there is combustible gas in the auxiliary decoking tank.

[0009] In any of the above technical solutions, the black coking device further includes a coking exhaust valve, and the exhaust pipe passes through the coking exhaust valve, and the coking exhaust valve is used to control the opening or closing of the exhaust pipe.

[0010] In any of the above technical solutions, the filter is further provided with a purge port, and the purge port is provided with a valve for purging the interior of the filter.

[0011] In any of the above technical solutions, the hopper is further provided with an exhaust port.

[0012] In any of the above technical solutions, the carbon black decoking device further includes a filter bag, and the filter bag is connected to the exhaust port.

[0013] In any of the above technical solutions, the filter is further described as a bag filter.

[0014] This application also provides a carbon black production system, including a pyrolysis unit and the carbon black decoking device described in any of the above technical solutions. The pyrolysis unit includes a pyrolysis furnace, a heat exchanger, and a decoking tank, and the decoking tank is connected to the outlet of the pyrolysis furnace through the heat exchanger. The discharge valve is located at the outlet end of the decoking tank, and the pulverizer is located below the outlet end of the decoking tank. Therefore, it possesses all the beneficial technical effects of this carbon black decoking device, which will not be elaborated further here.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] This carbon black decoking device enables the decoking and recycling of carbon black, reducing manpower and improving work efficiency. Furthermore, since manual decoking is unnecessary, it avoids the dangers of worker burns, ensuring worker safety. No air enters during the entire decoking process, significantly improving the quality of the carbon black. Simultaneously, no hydrogen gas escapes during the decoking process, effectively preventing the risk of explosion, making it safer and more reliable. Moreover, the carbon black can be recycled and reused, avoiding unnecessary waste and greatly increasing carbon black production. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the carbon black decoking device provided in an embodiment of this application.

[0019] Figure label:

[0020] 1-Cracking furnace, 2-Heat exchanger, 3-Coke removal tank, 4-Discharge valve, 5-Pulverizer, 6-Auxiliary coke removal tank, 7-Replacement pipeline, 8-Exhaust pipeline, 9-Filter, 91-Purge port, 92-Valve, 93-Vent port, 10-Discharge valve, 11-Discharge pipeline, 12-Hopper, 121-Exhaust port, 13-Induced draft fan, 14-Replacement valve, 15-Gas analyzer, 16-Coke removal exhaust valve. Detailed Implementation

[0021] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0022] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0023] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] The carbon black decoking apparatus and carbon black production system according to some embodiments of this application are described below with reference to FIG1.

[0027] Example 1

[0028] Referring to Figure 1, an embodiment of this application provides a carbon black decoking device for a pyrolysis unit, comprising: a discharge valve 4, a crusher 5, an auxiliary decoking tank 6, a displacement pipeline 7, an exhaust pipeline 8, a filter 9, an exhaust valve 10, a discharge pipeline 11, and a hopper 12; wherein, the discharge valve 4 is located at the outlet end of the decoking tank 3 of the pyrolysis unit and is used to control the opening or closing of the outlet end of the decoking tank 3; the crusher 5 is located below the outlet end of the decoking tank 3 and is used to receive and crush the carbon black coke blocks discharged from the decoking tank 3; the auxiliary decoking tank 6 is located below the crusher 5 and is used to receive the crushed carbon black coke blocks discharged from the crusher 5;

[0029] The replacement pipeline 7 is connected to the auxiliary coke removal tank 6, and the filter 9 is connected to the auxiliary coke removal tank 6 through the exhaust pipeline 8. The replacement pipeline 7 is used to introduce inert gas into the auxiliary coke removal tank 6, and the inert gas can purge the combustible gas in the auxiliary coke removal tank 6 into the exhaust pipeline 8, and then enter the filter 9 through the exhaust pipeline 8. The filter 9 is used to separate the carbon black from the combustible gas. The hopper 12 is connected to the outlet of the auxiliary coke removal tank 6 through the discharge pipeline 11, and is used to store the qualified carbon black discharged from the auxiliary coke removal tank 6 in the hopper 12. The discharge valve 10 is set at the outlet of the auxiliary coke removal tank 6 and is used to control the opening or closing of the outlet of the auxiliary coke removal tank 6.

[0030] Based on the structure described above, the working process of the carbon black decoking device provided in this application is as follows: Carbon black is produced by cracking in the cracking furnace 1. The carbon black is led to the next process by the negative pressure of the high-efficiency heat exchanger 2. Large carbon black particles or coke lumps will fall into the decoking tank 3. After a period of time, the discharge valve 4 at the bottom of the decoking tank 3 is opened, and the crusher 5 is started. After crushing, qualified carbon black falls into the auxiliary decoking tank 6. Then, inert gas, such as nitrogen, is introduced into the auxiliary decoking tank 6 through the replacement pipeline 7 to purge the combustible gas in the tank into the filter 9 for separation of carbon black and combustible gas. The combustible gas is discharged from the vent 93 of the filter 9. After a period of time, when the combustible gas in the auxiliary decoking tank 6 has been completely discharged, the discharge valve 10 is opened to discharge the crushed qualified carbon black into the silo 12.

[0031] It is evident that this carbon black decoking device enables the decoking and recycling of carbon black, reducing manpower and improving work efficiency. Furthermore, since manual decoking is unnecessary, it avoids the dangers of worker burns, ensuring worker safety. Moreover, no air enters during the entire decoking process, significantly improving the quality of the carbon black. Simultaneously, no hydrogen gas escapes during the entire decoking process, effectively preventing the risk of explosion, making it safer and more reliable. Furthermore, the carbon black can be recycled and reused, avoiding unnecessary waste and greatly increasing carbon black production.

[0032] In this embodiment, preferably as shown in FIG1, the carbon black decoking device further includes an induced draft fan 13, and the discharge pipe 11 passes through the induced draft fan 13, and the induced draft fan 13 is used to draw qualified carbon black discharged from the auxiliary decoking tank 6 into the silo 12.

[0033] As can be seen from the structure described above, the induced draft fan 13 can provide power to draw qualified carbon black discharged from the auxiliary coke removal tank 6 into the silo 12, which has a high degree of automation.

[0034] It should be noted that the structure is not limited to the above-mentioned structure of equipping the discharge pipe 11 with the induced draft fan 13. When the hopper 12 is located below the auxiliary decoking tank 6, automatic discharge can be achieved by gravity.

[0035] In this embodiment, preferably as shown in FIG1, the carbon black decoking device further includes a displacement valve 14, and the displacement pipeline 7 passes through the displacement valve 14, and the displacement valve 14 is used to control the opening or closing of the displacement pipeline 7.

[0036] As can be seen from the structure described above, the replacement valve 14 can be used to control the opening or closing of the pipeline, thereby realizing the operation of supplying inert gas such as nitrogen to the auxiliary coke removal tank 6, or stopping the operation of supplying inert gas such as nitrogen to the auxiliary coke removal tank 6, which makes the controllability stronger.

[0037] Furthermore, preferably, the replacement valve 14 is a solenoid valve with opening and closing functions, which can be opened or closed automatically without manual operation.

[0038] It should be noted that the replacement valve 14 can be a common valve with opening and closing functions in the prior art, and the specific selection should be based on the actual washing needs.

[0039] In addition, it should be noted that: this replacement valve 14 may not be provided. Instead, the gas supply can be controlled by opening or closing the inert gas source connected to the replacement pipeline 7.

[0040] In this embodiment, preferably as shown in FIG1, the carbon black decoking device further includes a gas analyzer 15, and the detection end of the gas analyzer 15 is connected to the exhaust pipe 8, and the gas analyzer 15 is used to detect whether there is combustible gas in the auxiliary decoking tank 6.

[0041] As can be seen from the structure described above, the gas analyzer 15 can be used to analyze whether the combustible gas in the auxiliary coke removal tank 6 has been completely removed. When the combustible gas in the auxiliary coke removal tank 6 has been completely removed, that is, when the detection value of the gas analyzer 15 reaches the gas safety value, the discharge valve 10 can be opened to discharge the qualified carbon black in the auxiliary coke removal tank 6 into the silo 12.

[0042] It should be noted that the gas analyzer 15 may not be necessary. As long as sufficient time is allowed, the combustible gas in the auxiliary decoking tank 6 can be completely removed, in which case the gas analyzer 15 is not required.

[0043] In this embodiment, preferably as shown in FIG1, the black coking device further includes a coking exhaust valve 16, and the exhaust pipe 8 passes through the coking exhaust valve 16, and the coking exhaust valve 16 is used to control the opening or closing of the exhaust pipe 8.

[0044] As can be seen from the structure described above, the decoking exhaust valve 16 can control the opening of the exhaust pipe 8, thereby purging the combustible gas in the auxiliary decoking tank 6 into the exhaust pipe 8, and then transporting it to the filter 9 through the exhaust pipe 8. Moreover, the decoking exhaust valve 16 can control the closing of the exhaust pipe 8, that is, stop the above-mentioned purging operation.

[0045] Furthermore, preferably, the decoking and exhaust valve 16 is a solenoid valve with opening and closing functions, which can be opened or closed automatically without manual operation.

[0046] In this embodiment, preferably as shown in FIG1, the filter 9 has a purge port 91, and the purge port 91 is provided with a valve 92 for purging the interior of the filter 9.

[0047] As can be seen from the structure described above, after the filter 9 has been used for a period of time, the valve 92 can be opened to effectively purge the interior of the filter 9 with an inert gas such as nitrogen through the purge port 91, ensuring that the filter 9 can work normally.

[0048] Furthermore, preferably, the filter 9 can be a bag filter. Of course, it is not limited to this, and the type of filter 9 can be selected according to actual needs.

[0049] Furthermore, the filter 9 also has a vent 93, through which combustible gas can be discharged.

[0050] In this embodiment, preferably as shown in FIG1, the hopper 12 has an exhaust port 121.

[0051] Furthermore, preferably, the carbon black decoking device also includes a filter bag, and the filter bag is connected to the exhaust port 121.

[0052] As can be seen from the structure described above, the pulverized qualified carbon black is drawn into the silo 12, and the gas can be discharged into the filter bag through the exhaust port 121 of the silo 12, and discharged after being filtered by the filter bag, thus avoiding environmental pollution.

[0053] It should be noted that the aforementioned filter bag may not be required, and the gas may be directly discharged into the atmosphere, depending on the actual needs.

[0054] In this embodiment, preferably, as shown in FIG1, the discharge valve 4 and the discharge valve 10 can both be solenoid valves with opening and closing functions, which can be opened or closed automatically without manual operation.

[0055] The carbon black decoking device also includes a control device, which is connected to the aforementioned discharge valve 4, discharge valve 10, replacement valve 14, decoking exhaust valve 16, gas analyzer 15 and induced draft fan 13, etc., and can control the operation of the above components. It has stronger controllability and higher degree of automation. Moreover, control devices that can control the opening or closing of equipment are common and will not be described in detail here.

[0056] In this embodiment, preferably, as shown in FIG1, the pulverizer 5 is arranged directly below the decoking tank 3 of the pyrolysis device along the vertical direction, and the auxiliary decoking tank 6 is arranged directly below the pulverizer 5. Of course, it is not limited to this. The pulverizer 5 is arranged below the decoking tank 3 of the pyrolysis device, but not directly below it, and the auxiliary decoking tank 6 is arranged directly below the pulverizer 5, but not directly below it. The specific design depends on the actual needs.

[0057] In summary, the detailed working process of the carbon black decoking device provided in this application is as follows:

[0058] Carbon black is produced by cracking in cracking furnace 1. The carbon black is then guided to the next process under negative pressure by high-efficiency heat exchanger 2. Large carbon black particles or coke lumps fall into the decoking tank 3. After a period of time, the discharge valve 4 at the bottom of the decoking tank 3 is opened, and the pulverizer 5 is started. After pulverization, qualified carbon black falls into the auxiliary decoking tank 6. After a period of pulverization, the discharge valve 4 on the decoking tank 3 is closed, and the pulverizer 5 is stopped. Then, the replacement valve 14 and the decoking exhaust valve 16 are opened to guide the combustible gas in the tank to the filter 9 for separation of carbon black and combustible gas. The combustible gas exits from the filter 9. The gas is discharged through the vent 93. After the gas analyzer 15 analyzes the gas and the gas safety value is reached (that is, there is no combustible gas in the auxiliary decoking tank 6), the decoking exhaust valve 16 is closed, the discharge valve 10 is opened, and the induced draft fan 13 is started to draw the pulverized qualified carbon black into the silo 12. The gas is discharged through the filter bag using the exhaust port 121 of the silo 12. The qualified carbon black falls down. After the timed material extraction is completed, the induced draft fan 13 is stopped, and the discharge valve 10 and the replacement valve 14 are closed. This procedure is completed. The procedure will continue to be executed after the next timed procedure is completed.

[0059] It is evident that this carbon black decoking device enables the decoking and recycling of carbon black, reducing manpower and improving work efficiency. Furthermore, since manual decoking is unnecessary, it avoids the dangers of worker burns, ensuring worker safety. Moreover, no air enters during the entire decoking process, significantly improving the quality of the carbon black. Simultaneously, no hydrogen gas escapes during the entire decoking process, effectively preventing the risk of explosion, making it safer and more reliable. Furthermore, the carbon black can be recycled and reused, avoiding unnecessary waste and greatly increasing carbon black production.

[0060] Example 2

[0061] Referring to Figure 1, Embodiment 2 of this application also provides a carbon black production system, including the carbon black decoking device described in Embodiment 1 above. Therefore, it has all the beneficial technical effects of the carbon black decoking device, and the same technical features and beneficial effects will not be repeated.

[0062] In this embodiment, preferably as shown in FIG1, the carbon black production system further includes a pyrolysis device, which includes a pyrolysis furnace 1, a heat exchanger 2, and a coke removal tank 3. The coke removal tank 3 is connected to the discharge port of the pyrolysis furnace 1 through the heat exchanger 2. A discharge valve 4 is provided at the outlet end of the coke removal tank 3. A pulverizer 5 is provided below the outlet end of the coke removal tank 3.

[0063] As can be seen from the structure described above, the carbon black production system provided in this application can realize the operation of carbon black decoking and recycling, reducing manpower and improving work efficiency. Moreover, since manual decoking is not required, the dangers of worker burns are avoided, thus ensuring worker safety. Furthermore, no air enters during the entire decoking process, which greatly improves the quality of carbon black. At the same time, no hydrogen gas is released during the entire decoking process, which can effectively avoid the risk of explosion, making it safer and more reliable. In addition, the carbon black can be recycled and reused, thus avoiding unnecessary waste and greatly increasing the output of carbon black.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A carbon black decoking device, applied in a pyrolysis unit, characterized in that, The carbon black decoking device includes: a discharge valve, a pulverizer, an auxiliary decoking tank, a displacement pipeline, an exhaust pipeline, a filter, an emission valve, a discharge pipeline, and a silo; wherein, the discharge valve is located at the outlet end of the decoking tank of the pyrolysis device and is used to control the opening or closing of the outlet end of the decoking tank; the pulverizer is located below the outlet end of the decoking tank and is used to receive and pulverize the carbon black coke blocks discharged from the decoking tank; the auxiliary decoking tank is located below the pulverizer and is used to receive the pulverized carbon black discharged from the pulverizer; the displacement pipeline is connected to the auxiliary decoking tank, and the filter is connected to the exhaust pipeline. The pipeline is connected to the auxiliary coke removal tank. The displacement pipeline is used to introduce inert gas into the auxiliary coke removal tank, and the inert gas can purge the combustible gas in the auxiliary coke removal tank into the discharge pipeline, and then enter the filter through the discharge pipeline. The filter is used to separate the carbon black from the combustible gas. The silo is connected to the outlet of the auxiliary coke removal tank through the discharge pipeline, and is used to store the qualified carbon black discharged from the auxiliary coke removal tank in the silo. The discharge valve is set at the outlet of the auxiliary coke removal tank and is used to control the opening or closing of the outlet of the auxiliary coke removal tank.

2. The carbon black decoking device according to claim 1, characterized in that, The carbon black decoking device also includes an induced draft fan, and the discharge pipeline passes through the induced draft fan. The induced draft fan is used to draw qualified carbon black discharged from the auxiliary decoking tank into the silo.

3. The carbon black decoking device according to claim 1, characterized in that, The carbon black decoking device also includes a displacement valve, and the displacement pipeline passes through the displacement valve, and the displacement valve is used to control the opening or closing of the displacement pipeline.

4. The carbon black decoking device according to claim 1, characterized in that, The carbon black decoking device also includes a gas analyzer, and the detection end of the gas analyzer is connected to the exhaust pipe. The gas analyzer is used to detect whether there is combustible gas in the auxiliary decoking tank.

5. The carbon black decoking device according to claim 1, characterized in that, The black coking device also includes a coking exhaust valve, and the exhaust pipe passes through the coking exhaust valve, and the coking exhaust valve is used to control the opening or closing of the exhaust pipe.

6. The carbon black decoking device according to claim 1, characterized in that, The filter has a purge port, and the purge port is equipped with a valve for purging the interior of the filter.

7. The carbon black decoking device according to claim 1, characterized in that, The silo has an exhaust port.

8. The carbon black decoking device according to claim 7, characterized in that, The carbon black decoking device also includes a filter bag, and the filter bag is connected to the exhaust port.

9. The carbon black decoking apparatus according to any one of claims 1 to 8, characterized in that, The filter is a bag filter.

10. A carbon black production system, characterized in that, The device includes a pyrolysis unit and a carbon black decoking device as described in any one of claims 1 to 9; wherein the pyrolysis unit includes a pyrolysis furnace, a heat exchanger, and a decoking tank, and the decoking tank is connected to the outlet of the pyrolysis furnace through the heat exchanger; the discharge valve is disposed at the outlet end of the decoking tank; and the pulverizer is disposed below the outlet end of the decoking tank.

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