Tail gas treatment device and carbon black preparation system

Abstract

The invention relates to the technical field of gas treatment, in particular to a tail gas treatment device and a carbon black preparation system.The tail gas treatment device comprises a first treatment pipe and a second treatment pipe which are connected in parallel, the first treatment pipe is provided with a first area which can be selectively opened and closed, and a first gas-solid separation assembly is arranged in the first area; the first treatment pipe is provided with a first area which can be selectively opened and closed, the second treatment pipe is provided with a second area which can be selectively opened and closed, a second gas-solid separation assembly is arranged in the second area, and the first area and the second area are alternately opened and closed, so that the first treatment pipe and the second treatment pipe alternately convey tail gas; when the first area is closed, the first gas-solid separation assembly is replaced or cleaned, and when the second area is closed, the second gas-solid separation assembly is replaced or cleaned. The carbon black mixed in the tail gas is treated, so that the carbon black is separated from the tail gas.

Description

Technical Field

[0001] The invention relates to the technical field of gas treatment, in particular to a tail gas treatment device and a carbon black preparation system. Background Art

[0002] Carbon black is a widely used functional material. At present, the main method for producing carbon black is the furnace method (including the oil furnace method and the gas furnace method), which heats the raw materials in the reaction furnace to crack the raw materials into carbon black and hydrogen.

[0003] In recent years, plasma method has been adopted to heat the reactor. The plasma method uses hydrogen, CH gas (such as natural gas) or inert gas including helium, nitrogen, argon, etc. as carrier gas. The carrier gas is ionized into an electronic state by a plasma generator, and generates heat to heat the reactor to reach the temperature required for cracking of the raw gas (oil). The raw hydrocarbon (including gaseous hydrocarbon, liquid hydrocarbon or solid hydrocarbon) is introduced into the reactor, thereby cracking to generate carbon black and hydrogen (if the cracking is incomplete, it will contain some CH gas). After rapid cooling, the carbon black and hydrogen are separated and recovered, and the excess gas is directly discharged.

[0004] It is noted that a large amount of carrier gas is required when the plasma generator is used, and the main components of the tail gas are hydrogen and CH gas. Therefore, the tail gas can be recycled and reused as carrier gas to reduce the tail gas emission. However, after the carbon black is collected, there will still be a small amount of small particles of carbon black in the tail gas. When these carbon blacks enter the plasma generator, they will block the plasma generator's carrier gas channel, so the carbon black in the tail gas needs to be treated. Summary of the invention

[0005] The purpose of the present invention is to provide an exhaust gas treatment device and a carbon black preparation system to treat the carbon black mixed in the exhaust gas, clean the exhaust gas with liquid, and completely purify and separate the carbon black from the exhaust gas.

[0006] To achieve the above-mentioned purpose, in a first aspect, an exhaust gas treatment device is provided, including: a first treatment tube and a second treatment tube connected in parallel, the first treatment tube is provided with a first area that can be selectively opened and closed, a first gas-solid separation component is provided in the first area, the second treatment tube is provided with a second area that can be selectively opened and closed, a second gas-solid separation component is provided in the second area, the first area and the second area are opened and closed alternately, so that the first treatment tube and the second treatment tube alternately transport exhaust, and when the first area is closed, they are used to replace or clean the first gas-solid separation component, and when the second area is closed, they are used to replace or clean the second gas-solid separation component.

[0007] In some embodiments, a first oxygen content analyzer and a first gas replacement component are provided in the first region, the first gas replacement component has a first gas introduction pipe and a first gas outlet pipe, the first gas introduction pipe and the first gas outlet pipe can be selectively opened or closed, and the first gas replacement component is used to replace the gas in the first region after replacing and cleaning the first gas-solid separation component, so that the oxygen content in the first region is lower than a first threshold value;

[0008] A second oxygen content analyzer and a second gas replacement component are provided in the second area. The second gas replacement component has a second gas inlet pipe and a second gas outlet pipe. Both the second gas inlet pipe and the second gas outlet pipe can be selectively opened or closed. The second gas replacement component is used to replace the gas in the second area after replacing or cleaning the second gas-solid separation component so that the oxygen content in the second area is lower than a second threshold value.

[0009] In some embodiments, the exhaust gas treatment device also includes an exhaust manifold, the output end of the first treatment pipe and the output end of the second treatment pipe are both connected to the exhaust manifold, and the input end of the first gas introduction pipe and the input end of the second gas introduction pipe are both connected to the exhaust manifold.

[0010] In some embodiments, the exhaust gas treatment device further includes an exhaust gas reflux pipe, which is used to connect to the reaction furnace, and the output ends of the first gas outlet pipe and the second gas outlet pipe are connected to the exhaust gas reflux pipe.

[0011] In some embodiments, the first processing tube is provided with two first valves spaced apart along the exhaust gas delivery direction, and the first area is formed between the two first valves; and / or,

[0012] The second processing pipe is provided with two second valves spaced apart along the exhaust gas conveying direction, and the second area is formed between the two second valves.

[0013] In some embodiments, the first processing tube is provided with a first pressure sensor and a second pressure sensor spaced apart along the exhaust gas conveying direction of the first processing tube, and the first gas-solid separation component is located between the first pressure sensor and the second pressure sensor; and / or

[0014] The second processing tube is provided with a third pressure sensor and a fourth pressure sensor which are arranged at intervals along the exhaust gas conveying direction of the second processing tube, and the second gas-solid separation component is located between the third pressure sensor and the fourth pressure sensor.

[0015] In some embodiments, a first mounting port is provided in the first region, and the first gas-solid separation component is detachably provided in the first mounting port; two first connecting members movably provided along the axial direction of the first processing tube are provided on the first mounting port, and the two first connecting members can be locked or separated with each other; and / or

[0016] A second mounting port is provided in the second region, and the second gas-solid separation component is detachably provided in the second mounting port; two second connecting members movably provided along the axial direction of the second processing tube are provided on the second mounting port, and the two second connecting members can be locked or separated with each other.

[0017] In some embodiments, the exhaust gas treatment device also includes a container and an intake manifold for conveying exhaust gas, the container has a chamber, a liquid is arranged in the chamber, the output end of the intake manifold is connected to the liquid so that the exhaust gas enters the liquid, and the input ends of the first treatment tube and the second treatment tube are connected to the chamber.

[0018] In some embodiments, the container is provided with an overflow hole and a liquid inlet hole connected to the chamber, the overflow hole is located on the side wall of the container and is higher than the liquid level of the liquid, the overflow hole is connected to an overflow pipe, and the liquid inlet hole is configured to inject the liquid into the chamber when carbon black floats on the liquid surface so that the liquid level is equal to or higher than the overflow hole; and or

[0019] The water pressure at the output end of the intake manifold is lower than the air pressure of the tail gas, and the pressure at the output end of the overflow pipe is lower than the air pressure of the tail gas.

[0020] In a second aspect, a carbon black preparation system is provided, comprising: a reactor and a plasma generator arranged in the reactor, a carbon black collecting device is arranged at the product outlet of the reactor, the output end of the carbon black collecting device is connected to the above-mentioned exhaust gas treatment device, and the output end of the exhaust gas treatment device is connected to the carrier gas inlet of the plasma generator.

[0021] Compared with the prior art, the beneficial effects of the present invention are: the first processing tube and the second processing tube alternately transport the exhaust gas, which can continuously treat the exhaust gas and improve the treatment efficiency; and when the first processing tube or the second processing tube stops transporting the exhaust gas, the first gas-solid separation component or the second gas-solid separation component can be replaced or cleaned so as to continue to treat the exhaust gas subsequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a carbon black preparation system provided in an embodiment of the present invention.

[0023] Figure 2A schematic diagram of the gas-solid separation portion of the tail gas treatment device provided in an embodiment of the present invention.

[0024] Figure 3 A schematic diagram of a first processing tube and a second processing tube provided in an embodiment of the present invention.

[0025] Figure 4 A schematic diagram of a first gas-solid separation assembly provided in an embodiment of the present invention installed on a first processing tube.

[0026] In the figure: 1, reactor; 2, plasma generator; 3, cooling device; 4, carbon black collecting device; 41, tail gas reflux pipe; 42, gas delivery pipe; 5, hydrogen collecting device; 6, tail gas treatment device; 61, intake manifold; 62, container; 621, chamber; 623, liquid level; 624, liquid inlet hole; 625, liquid discharge hole; 626, overflow pipe; 627, overflow box; 628, liquid level sensor; 63, first treatment pipe; 631, first gas-solid separation component; 632, first valve; 633, first oxygen content quantity analyzer; 634, the first gas inlet pipe; 635, the first gas outlet pipe; 636, the first pressure sensor; 637, the second pressure sensor; 638, the first installation port; 639, the first connecting piece; 64, the second processing pipe; 641, the second gas-solid separation component; 642, the second valve; 643, the second oxygen content analyzer; 644, the second gas inlet pipe; 645, the second gas outlet pipe; 646, the third pressure sensor; 647, the fourth pressure sensor; 65, the exhaust main pipe; 7, the buffer tank. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It is also necessary to explain that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all.

[0028] Some directional words are defined in the present invention. Unless otherwise specified, the directional words used, such as "up", "down", "left", "right", "inside" and "outside", are used to facilitate understanding and therefore do not constitute a limitation on the scope of protection of the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Figure 1 Schematic diagram of a carbon black preparation system provided by an embodiment of the present invention is shown. Figure 1 The carbon black preparation system includes a reactor 1 having a reaction chamber, and a plasma generator 2 disposed in the reactor 1 for heating the reaction chamber. The reactor 1 is also provided with a raw material inlet connected to the reaction chamber for raw materials to enter the reaction chamber, and a product outlet connected to the reaction chamber for products to be discharged. A cooling component for cooling the plasma generator 2 is disposed on the periphery of the plasma generator 2, and the cooling medium used by the cooling component is preferably soft water.

[0032] It should be noted that the raw material can be raw gas or raw oil. If it is raw oil, it is best to atomize it before the reaction so that it can be cracked completely. Whether it is raw gas or raw oil, the main components are hydrocarbon substances composed of carbon and hydrogen elements. Hydrocarbon substances will crack at high temperatures to form carbon black and hydrogen. Taking methane as an example, the cracking reaction is as follows:

[0033]

[0034] Of course, in reality the cracking cannot be complete, so the cracking products include, in addition to carbon black and hydrogen, a small amount of uncracked hydrocarbons and a small amount of impurities (depending on the purity of the hydrocarbons).

[0035] When preparing carbon black, first, the plasma generator 2 is powered on so that the plasma generator 2 forms a plasma torch in the reaction chamber of the reactor 1, and the reaction chamber is heated to a temperature at which the raw materials can be cracked; then, the raw materials enter the reaction chamber from the raw material inlet of the reactor 1, and are cracked in a high temperature environment to form products; finally, the products are discharged from the product outlet of the reactor 1.

[0036] like Figure 1 As shown, since the product discharged from the product outlet is high-temperature flue gas mixed with carbon black, in order to collect the carbon black in the product, the high-temperature flue gas needs to be cooled first, so a cooling device 3 is connected to the product outlet, and the cooling device 3 is used to cool the product. Preferably, the temperature of the product after cooling by the cooling device 3 is 200-280°C. The cooling device 3 can be a cooling screw conveyor.

[0037] like Figure 1 As shown, the outlet of the cooling device 3 is connected to a blower, and a carbon black collecting device 4 is arranged in the air supply direction of the blower. The carbon black collecting device 4 is used to perform gas-solid separation on the product, thereby separating the carbon black in the product, and transporting the carbon black to the carbon black storage tank by mechanical transportation. The carbon black transporting device also has a gas outlet for discharging the gas after gas-solid separation. As an example, the carbon black collecting device 4 can be a cyclone separator or a bag dust collector.

[0038] As mentioned above, there are a small amount of uncracked hydrocarbons in the product. Therefore, after gas-solid separation, the gas can be sent back to the reactor 1 to crack the uncracked hydrocarbons. At the same time, the gas sent back to the reaction chamber can also balance the pressure of the entire carbon black preparation system.

[0039] Specifically, Figure 1 As shown, a tail gas reflux pipe 41 is connected to the gas outlet of the carbon black collection device 4, and the other end of the tail gas reflux pipe 41 is connected to the reaction chamber, so that the gas discharged from the gas outlet can flow back into the reaction chamber along the tail gas reflux pipe 41.

[0040] like Figure 1 As shown, although part of the gas flows back into the reaction chamber through the tail gas reflux pipe 41, most of the gas does not need to flow back, but goes to the hydrogen collecting device 5. Specifically, a gas delivery pipe 42 is also provided on the gas outlet of the carbon black collecting device 4, and the other end of the gas delivery pipe 42 is connected to the hydrogen collecting device 5. The hydrogen collecting device 5 is used to separate the hydrogen in the gas to obtain high-purity hydrogen.

[0041] However, as mentioned above, not all of the gas is hydrogen. Therefore, after the hydrogen is separated, some gas will remain. In addition, the carbon black collection device 4 cannot guarantee that all of the carbon black is collected. Carbon black with smaller particles will be discharged from the gas outlet of the carbon black collection device 4. In this embodiment, the gas after the carbon black is separated or the gas remaining after the hydrogen is separated is called tail gas.

[0042] The exhaust gas enters the exhaust gas treatment device 6, and after gas-solid separation, the small particles of carbon black remaining in the exhaust gas are removed to obtain regenerated exhaust gas containing only gas. The regenerated exhaust gas is pressurized and enters the buffer tank 7, where it is stored and transported to the carrier gas inlet of the plasma generator 2 in a timely manner.

[0043] The purpose of removing small particles of carbon black is to prevent the regeneration exhaust gas from causing damage to the plasma generator 2 and the pressurized parts (such as pumps and compressors) described later.

[0044] The purpose of pressurization is to make the pressure of the regenerated exhaust gas adapt to the gas pressure in the buffer tank 7, because the pressure of the regenerated exhaust gas is usually lower than the gas pressure in the buffer tank 7. For example, the pressure of the regenerated exhaust gas is 1000-1500Pa, and the gas pressure in the buffer tank 7 is 0.3-0.4MPa.

[0045] After the exhaust gas is separated into gas and solid by the exhaust gas treatment device 6, it can be used as a carrier gas for the plasma generator 2, thereby reducing the amount of original carrier gas (gas used to make the plasma generator 2 work except for the regenerated exhaust gas). Therefore, in this embodiment, when the carbon black preparation system is just started, the original carrier gas needs to be used. Once a sufficient amount of regenerated exhaust gas enters the buffer tank 7, the amount of the original carrier gas can be gradually reduced or even stopped.

[0046] The tail gas treatment device 6 includes two parts, one part is used for performing gas-solid separation on the tail gas to form regenerated tail gas, and the other part is used for pressurizing the regenerated tail gas.

[0047] Figure 2 Schematic diagram of the gas-solid separation part of the tail gas treatment device 6 is shown. Figure 2 The exhaust gas treatment device 6 includes an intake manifold 61 for conveying exhaust gas and a container 62 connected to the output end of the intake manifold 61. The container 62 has a chamber 621. The chamber 621 is filled with liquid, such as water, preferably soft water. The output end of the intake manifold 61 extends into the liquid, that is, the output end of the intake manifold 61 is located below the liquid level 623. In this embodiment, the intake manifold 61 extends into the liquid from top to bottom, but it can be understood that in other embodiments, the intake manifold 61 can extend into the liquid from the side wall or bottom wall of the container 62.

[0048] In order to ensure that the exhaust gas can smoothly enter the liquid, the liquid pressure at the output end of the intake manifold 61 should be lower than the pressure of the exhaust gas in the intake manifold 61. Specifically, Wherein, H1 is the distance between the output end of the intake manifold 61 and the liquid level 623 in the chamber 621, V1 is the exhaust gas pressure in the intake manifold 61, ρ is the density of the liquid, and g is the acceleration due to gravity.

[0049] After the exhaust gas enters the liquid, the solid particles (mainly small particles of carbon black) mixed in the exhaust gas will remain in the liquid, while the gas will rise from the liquid, achieving gas-solid separation through the liquid.

[0050] like Figure 2 As shown, the container 62 is also provided with a liquid inlet hole 624 and a liquid discharge hole 625. The liquid inlet hole 624 is used to add liquid into the chamber 621, and the liquid discharge hole 625 is used to discharge the liquid in the chamber 621. In addition, the container 62 is also provided with a liquid level sensor 628 for detecting the liquid level. The liquid pressure at the output end of the intake manifold 61 can be indirectly or directly represented by the liquid level sensor 628. As an example of the liquid level sensor 628, the liquid level sensor 628 can be a radar level gauge, a glass tube level gauge, etc.

[0051] When the carbon black is collected by the liquid, it will float on the surface of the liquid. In order to discharge the carbon black floating on the liquid surface 623, an overflow hole is also provided on the container 62. The height of the overflow hole is slightly higher than the liquid surface 623 under normal conditions. When a large amount of carbon black floats on the liquid surface 623 or after a preset time, the liquid inlet hole 624 adds a certain amount of liquid into the chamber 621 to make the liquid surface 623 rise, and the rising liquid surface 623 is slightly higher than the overflow hole, so that the top layer of liquid can flow into the overflow hole and enter the overflow box 627 arranged on one side of the container 62 along the overflow pipe 626 connected to the overflow hole, so that the carbon black floating on the liquid surface 623 is discharged into the overflow box 627, thereby realizing the transfer of carbon black. It can be understood that the above overflow process continues until the height of the liquid surface 623 drops to below the overflow hole again.

[0052] In order to ensure that the liquid level is normal (i.e. the liquid level 623 is lower than the overflow hole height), the tail gas located at the upper part of the chamber 621 will not flow into the overflow hole to cause tail gas leakage, the output end of the overflow pipe 626 needs to be immersed in the liquid in the overflow box 627, and the liquid pressure at the output end of the overflow pipe 626 is greater than the pressure of the tail gas in the chamber 621. Specifically, Wherein, H2 is the distance between the output end of the overflow pipe 626 and the liquid level in the overflow box 627, V2 is the tail gas pressure in the chamber 621, ρ is the density of the liquid, and g is the acceleration due to gravity.

[0053] like Figure 2As shown, in this embodiment, the container 62 has a top wall, so that the upper part of the chamber 621 is closed to prevent the exhaust gas from directly leaking out of the container 62. A first processing tube 63 and a second processing tube 64 are arranged above the container 62. The input end ( Figure 2 The lower middle end) and the output end of the second processing tube 64 ( Figure 2 The middle and lower ends) are connected to the chamber 621, so that the exhaust gas in the chamber 621 can enter the first processing tube 63 and the second processing tube 64. The output end ( Figure 2 The output end of the second processing tube 64 ( Figure 2 The upper and middle ends of the first processing tube 63 and the second processing tube 64 are connected to the exhaust main pipe 65. It can be seen that the input end of the first processing tube 63 and the input end of the second processing tube 64 are connected to each other, and the output end of the first processing tube 63 and the output end of the second processing tube 64 are also connected to each other. It can be considered that the first processing tube 63 and the second processing tube 64 are connected in parallel.

[0054] like Figure 3 As shown, two first valves 632 are disposed on the first processing pipe 63, and the two first valves 632 are spaced apart along the exhaust gas conveying direction of the first processing pipe 63. Figure 3 In the embodiment, the first treatment pipe 63 is provided with an upper and lower interval arrangement, so that when the two first valves 632 are closed at the same time, a closed first area can be formed on the first treatment pipe 63, at which time the first treatment pipe 63 is blocked, and the tail gas cannot enter the exhaust manifold 65 through the first treatment pipe 63; when the two first valves 632 are opened at the same time, the first area is opened, the first treatment pipe 63 is in a smooth state, and the tail gas can enter the exhaust manifold 65 through the first treatment pipe 63. A first gas-solid separation component 631 is arranged in the first area, and the first gas-solid separation component 631 is used to perform gas-solid separation on the tail gas, that is, to separate the small particles of carbon black in the tail gas from the tail gas. Specifically, when the two first valves 632 are opened at the same time, the tail gas can enter the first area, so that the small particles of carbon black in the tail gas are blocked by the first gas-solid separation component 631 and separated from the gas in the tail gas, and the gas can pass through the first gas-solid separation component 631 normally, so that the tail gas is purified.

[0055] Similar to the first processing tube 63, Figure 3 As shown, two second valves 642 are provided on the second processing pipe 64, and the two second valves 642 are spaced apart along the exhaust gas delivery direction of the second processing pipe 64. Figure 3In the embodiment, the upper and lower intervals are set, so that when the two second valves 642 are closed at the same time, a closed second area can be formed on the second treatment pipe 64, at which time the second treatment pipe 64 is blocked, and the exhaust gas cannot enter the exhaust manifold 65 through the second treatment pipe 64; when the two second valves 642 are opened at the same time, the second area is opened, the second treatment pipe 64 is in a smooth state, and the exhaust gas can enter the exhaust manifold 65 through the second treatment pipe 64. A second gas-solid separation component 641 is arranged in the second area, and the second gas-solid separation component 641 is used to perform gas-solid separation on the exhaust gas, that is, to separate the small particles of carbon black in the exhaust gas from the exhaust gas. Specifically, when the two second valves 642 are opened at the same time, the exhaust gas can enter the second area, so that the small particles of carbon black in the exhaust gas are blocked by the second gas-solid separation component 641 and separated from the gas in the exhaust gas, and the gas can pass through the second gas-solid separation component 641 normally, so that the exhaust gas is purified.

[0056] In this embodiment, the first processing tube 63 and the second processing tube 64 are used alternately. Specifically, when the first area of ​​the first processing tube 63 is opened, the second area of ​​the second processing tube 64 is closed, so that the exhaust gas can only enter the exhaust manifold 65 through the first processing tube 63; conversely, when the first area of ​​the first processing tube 63 is closed, the second area of ​​the second processing tube 64 is opened, so that the exhaust gas can only enter the exhaust manifold 65 through the second processing tube 64.

[0057] The purpose of using the first processing tube 63 and the second processing tube 64 alternately is to ensure that the tail gas can be continuously transported without interruption, and there is no need to stop the transportation of the tail gas due to replacement or cleaning of the gas-solid separation component.

[0058] As the tail gas continuously passes through the first gas-solid separation component 631, a large amount of carbon black will accumulate on the first gas-solid separation component 631, which in turn inhibits the carbon black in the tail gas from staying on the first gas-solid separation component 631, thereby reducing the effect of gas-solid separation. At this time, it is necessary to replace or clean the first gas-solid separation component 631. To this end, the two first valves 632 can be closed at the same time to seal the first area to prevent the tail gas from entering the first processing tube 63 again, and the two second valves 642 can be opened at the same time to open the second area and introduce the tail gas into the second processing tube 64. At this time, the first gas-solid separation component 631 on the first processing tube 63 can be replaced or cleaned.

[0059] Similar to the first gas-solid separation component 631, as the tail gas continuously passes through the second gas-solid separation component 641, a large amount of carbon black will accumulate on the second gas-solid separation component 641, which in turn inhibits the carbon black in the tail gas from staying on the second gas-solid separation component 641, thereby reducing the effect of gas-solid separation. At this time, it is necessary to replace or clean the first gas-solid separation component 631. To this end, the two second valves 642 can be closed at the same time to seal the second area to prevent the tail gas from entering the second processing tube 64 again, and the two first valves 632 can be opened at the same time to open the first area and introduce the tail gas into the first processing tube 63. At this time, the second gas-solid separation component 641 on the second processing tube 64 can be replaced or cleaned.

[0060] In order to characterize the gas-solid separation effect of the first gas-solid separation component 631, as shown in FIG. Figure 3 As shown, a first pressure sensor 636 and a second pressure sensor 637 are provided on the first processing tube 63. The first pressure sensor 636 is provided below the first gas-solid separation component 631, and the second pressure sensor 637 is provided above the first gas-solid separation component 631. It can be understood that when the gas-solid separation effect of the first gas-solid separation component 631 is good, the value displayed by the first pressure sensor 636 is not much different from the value displayed by the second pressure sensor 637; when the difference between the value displayed by the first pressure sensor 636 and the value displayed by the second pressure sensor 637 is greater than a preset value (determined according to the first gas-solid separation component 631 actually used), it can be considered that the gas-solid separation effect of the first gas-solid separation component 631 is not good, and the first gas-solid separation component 631 needs to be replaced or cleaned.

[0061] In order to characterize the gas-solid separation effect of the second gas-solid separation component 641, as shown in FIG. Figure 3 As shown, a third pressure sensor 646 and a fourth pressure sensor 647 are provided on the second processing tube 64, the third pressure sensor 646 is provided below the second gas-solid separation component 641, and the fourth pressure sensor 647 is provided above the second gas-solid separation component 641. It can be understood that when the gas-solid separation effect of the second gas-solid separation component 641 is good, the value displayed by the third pressure sensor 646 is not much different from the value displayed by the fourth pressure sensor 647; when the difference between the value displayed by the third pressure sensor 646 and the value displayed by the fourth pressure sensor 647 is greater than a preset value (determined according to the first gas-solid separation component 631 actually used), it can be considered that the gas-solid separation effect of the second gas-solid separation component 641 is not good, and the second gas-solid separation component 641 needs to be replaced or cleaned.

[0062] In this embodiment, the first gas-solid separation component 631 is detachably disposed on the first processing tube 63. Specifically, Figure 4As shown, the first processing tube 63 is provided with a first installation port 638 for installing the first gas-solid separation component 631, and first connecting pieces 639 are respectively provided above and below the first installation port 638, and the first connecting piece 639 can move along the axial direction of the first processing tube 63, for example, the first connecting piece 639 is a slip-on flange. When the first gas-solid separation component 631 needs to be replaced, the two first connecting pieces 639 can be separated up and down, so that the first gas-solid separation component 631 can be taken out from the first installation port 638, and the new first gas-solid separation component 631 is installed in the first installation port 638, and then the first connecting piece 639 is moved toward each other again, the first gas-solid separation component 631 is clamped, and then the two first connecting pieces 639 are locked, for example, by fasteners such as bolts. As an example of the first gas-solid separation component 631, a filter cloth can be used.

[0063] Similar to the first gas-solid separation component 631, the second gas-solid separation component 641 in this embodiment is detachably arranged on the second mounting port of the second processing tube 64, and a second connecting member similar to the first connecting member 639 can be arranged to clamp the second gas-solid separation component 641, which will not be described in detail here. As an example of the second gas-solid separation component 641, a filter cloth can be used.

[0064] like Figure 3 As shown, when replacing or cleaning the first gas-solid separation component 631, outside air, especially oxygen, will be introduced into the first area. When the tail gas (combustible mixture) is mixed with oxygen and the concentration of oxygen in the mixed gas reaches more than 3% (especially more than 5%), it may cause troubles for subsequent processing, such as encountering sparks (which can be generated by static electricity) and explosions. Therefore, after replacing and cleaning the first gas-solid separation component 631, it is necessary to replace the gas in the first area so that the oxygen content in the first area drops below the first threshold value (determined according to the composition of the tail gas).

[0065] To this end, a first gas displacement assembly may be provided on the first region, such as Figure 3As shown, the first gas replacement assembly includes a first gas inlet pipe 634 and a first gas outlet pipe 635, and the first gas inlet pipe 634 and the first gas outlet pipe 635 are both provided with corresponding valves, so that the first gas inlet pipe 634 and the first gas outlet pipe 635 can be selectively opened or closed, and the first gas replacement assembly is used to replace the gas in the first area after replacing and cleaning the first gas-solid separation assembly 631, so that the oxygen content in the first area is lower than the first threshold. Specifically, the input end of the first gas inlet pipe 634 is connected to the exhaust main pipe 65, so that the tail gas (not containing oxygen) treated by the first treatment pipe 63 or the second treatment pipe 64 can be introduced into the first area, and the gas in the first area can be discharged outside the first area through the first gas outlet pipe 635. When the oxygen content displayed on the oxygen content analyzer in the first area is lower than the first threshold, the first gas inlet pipe 634 and the first gas outlet pipe 635 can be closed to ensure that the oxygen content in the first area is lower than the first threshold. The purpose of mixing with tail gas is to dilute the volume ratio of oxygen in the tail gas to below 5%, especially below 3%.

[0066] like Figure 3 As shown, the output end of the first gas outlet pipe 635 is connected to the tail gas reflux pipe 41, so that the gas displaced from the first area flows back into the reactor 1, replenishing gas to the reactor 1 to balance the pressure of the carbon black preparation system while avoiding direct discharge of this part of the gas into the atmosphere.

[0067] like Figure 3 As shown, similar to the first gas replacement assembly of the first processing tube 63, a second gas replacement assembly is arranged on the second area of ​​the second processing tube 64, and the second gas replacement assembly includes a second gas inlet pipe 644 and a second gas outlet pipe 645. The second gas inlet pipe 644 and the second gas outlet pipe 645 are both provided with corresponding valves, so that the second gas inlet pipe 644 and the second gas outlet pipe 645 can be selectively opened or closed. The second gas replacement assembly is used to replace the gas in the second area after replacing and cleaning the second gas-solid separation assembly 641, so that the oxygen content in the second area is lower than the second threshold value (determined according to the composition of the exhaust gas). Specifically, the input end of the second gas introduction pipe 644 is connected to the exhaust main pipe 65, so that the tail gas (not containing oxygen) treated by the second processing pipe 64 or the second processing pipe 64 can be introduced into the second area, and the gas in the second area can be discharged outside the second area through the second gas outlet pipe 645. When the oxygen content displayed on the oxygen content analyzer in the second area is lower than the second threshold, the second gas introduction pipe 644 and the second gas outlet pipe 645 can be closed to ensure that the oxygen content in the second area is lower than the second threshold. The second threshold can be the same as or different from the first threshold.

[0068] like Figure 3 As shown, the output end of the second gas outlet pipe 645 is connected to the tail gas reflux pipe 41, so that the gas displaced from the second area flows back into the reactor 1, replenishing gas to the reactor 1 to balance the pressure of the carbon black preparation system while avoiding direct discharge of this part of the gas into the atmosphere.

[0069] The above is a description of the embodiments of the present invention. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in this article, but will comply with the widest range consistent with the principles and novelties disclosed herein.

Claims

1. An exhaust gas treatment device, characterized in that: include: A first processing tube (63) and a second processing tube (64) are connected in parallel, the first processing tube (63) is provided with a first area which can be selectively opened and closed, the first area is provided with a first gas-solid separation component (631), the second processing tube (64) is provided with a second area which can be selectively opened and closed, the second area is provided with a second gas-solid separation component (641), the first area and the second area are opened and closed alternately, so that the first processing tube (63) and the second processing tube (64) convey exhaust gas alternately, and when the first area is closed, they are used to replace or clean the first gas-solid separation component (631), and when the second area is closed, they are used to replace or clean the second gas-solid separation component (641).

2. The exhaust gas treatment device according to claim 1, characterized in that: A first oxygen content analyzer (633) and a first gas replacement component are provided in the first region. The first gas replacement component has a first gas introduction pipe (634) and a first gas outlet pipe (635). Both the first gas introduction pipe (634) and the first gas outlet pipe (635) can be selectively opened or closed. The first gas replacement component is used to replace the gas in the first region after replacing and cleaning the first gas-solid separation component (631), so that the oxygen content in the first region is lower than a first threshold value. A second oxygen content analyzer (643) and a second gas replacement component are provided in the second region. The second gas replacement component has a second gas inlet pipe (644) and a second gas outlet pipe (645). Both the second gas inlet pipe (644) and the second gas outlet pipe (645) can be selectively opened or closed. The second gas replacement component is used to replace the gas in the second region after replacing or cleaning the second gas-solid separation component (641) so that the oxygen content in the second region is lower than a second threshold value.

3. The exhaust gas treatment device according to claim 2, characterized in that: The exhaust gas treatment device (6) further comprises an exhaust main pipe (65), the output end of the first treatment pipe (63) and the output end of the second treatment pipe (64) are both connected to the exhaust main pipe (65), and the input end of the first gas introduction pipe (634) and the input end of the second gas introduction pipe (644) are both connected to the exhaust main pipe (65).

4. The exhaust gas treatment device according to claim 2, characterized in that: The tail gas treatment device (6) further comprises a tail gas reflux pipe (41), wherein the tail gas reflux pipe (41) is used to connect to the reaction furnace (1), and the output end of the first gas outlet pipe (635) and the output end of the second gas outlet pipe (645) are connected to the tail gas reflux pipe (41).

5. The exhaust gas treatment device according to claim 1, characterized in that: The first processing pipe (63) is provided with two first valves (632) spaced apart along the exhaust gas conveying direction of the first processing pipe (63), and the first area is formed between the two first valves (632); and / or, The second processing pipe (64) is provided with two second valves (642) spaced apart along the exhaust gas conveying direction of the second processing pipe (64), and the second area is formed between the two second valves (642).

6. The exhaust gas treatment device according to claim 1, characterized in that: The first processing tube (63) is provided with a first pressure sensor (636) and a second pressure sensor (637) arranged at intervals along the exhaust gas conveying direction, and the first gas-solid separation component (631) is located between the first pressure sensor (636) and the second pressure sensor (637); and / or The second processing tube (64) is provided with a third pressure sensor (646) and a fourth pressure sensor (647) which are arranged at intervals along the exhaust gas conveying direction, and the second gas-solid separation component (641) is located between the third pressure sensor (646) and the fourth pressure sensor (647).

7. The exhaust gas treatment device according to claim 1, characterized in that: A first mounting opening (638) is provided in the first region, and the first gas-solid separation component (631) is detachably arranged in the first mounting opening (638); the first mounting opening (638) is provided with two first connecting members (639) movably arranged along the axial direction of the first processing tube (63), and the two first connecting members (639) can be locked or separated with each other; and / or A second mounting port is provided in the second area, and the second gas-solid separation component (641) is detachably arranged in the second mounting port; two second connecting members movably arranged along the axial direction of the second processing tube (64) are provided on the second mounting port, and the two second connecting members can be locked or separated with each other.

8. The exhaust gas treatment device according to claim 1, characterized in that: The exhaust gas treatment device (6) further comprises a container (62) and an intake manifold (61) for conveying exhaust gas, wherein the container (62) has a chamber (621) in which a liquid is arranged, and an output end of the intake manifold (61) is connected to the liquid so that the exhaust gas enters the liquid, and input ends of the first treatment tube (63) and the second treatment tube (64) are connected to the chamber (621).

9. The exhaust gas treatment device according to claim 8, characterized in that: The container (62) is provided with an overflow hole and a liquid inlet hole (624) which are in communication with the chamber (621); the overflow hole is located on the side wall of the container (62) and is higher than the liquid level (623) of the liquid; the overflow hole is connected to an overflow pipe (626); the liquid inlet hole (624) is configured to inject the liquid into the chamber (621) when carbon black floats on the liquid level (623), so that the liquid level (623) is equal to or higher than the overflow hole; and or The water pressure at the output end of the intake manifold (61) is lower than the gas pressure of the exhaust gas, and the pressure at the output end of the overflow pipe (626) is lower than the gas pressure of the exhaust gas.

10. A carbon black preparation system, characterized in that: include: A reaction furnace (1) and a plasma generator (2) arranged in the reaction furnace (1), a carbon black collecting device (4) being arranged at the product outlet of the reaction furnace (1), an output end of the carbon black collecting device (4) being connected to an exhaust gas treatment device (6) according to any one of claims 1 to 9, and an output end of the exhaust gas treatment device (6) being connected to a carrier gas inlet of the plasma generator (2).

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