An exhaust gas circulation type partitioned regeneration catalyst device

Abstract

The present invention discloses an exhaust gas circulation type partitioned catalyst regeneration equipment, which relates to the field of catalyst regeneration technology, including a catalyst regeneration bed, an exhaust gas circulation oxygenation mechanism and an exhaust gas emission mechanism; the catalyst regeneration bed includes a shell, and the shell is divided into an upper and lower layer structure by a silicon carbide or quartz partition, wherein the upper layer and the lower layer are a regeneration channel and a heating channel respectively; the catalyst regeneration bed also includes a first metal conveyor belt and a second metal conveyor belt fixedly assembled in the regeneration channel, and the two ends of the first metal conveyor belt and the second metal conveyor belt extend to the outside of the regeneration channel respectively. The present invention can continuously regenerate the catalyst, and during the catalyst regeneration process, the catalyst can enter a number of independent chambers in sequence, so as to individually control the exhaust and oxygen supply in different temperature zones, so that the regeneration temperature and oxygen of the catalyst meet the technical requirements.

Description

Technical Field

[0001] The invention relates to the technical field of catalyst regeneration, in particular to an exhaust gas circulation type partitioned catalyst regeneration device. Background Art

[0002] After being used in a hydrogenation unit for one or several cycles, the catalyst is temporarily deactivated due to the formation of coke and carbon deposits on the catalyst surface caused by hydrocarbon cracking and unstable compound condensation, which causes its active centers to be covered and micropores to be blocked and closed. However, the activity of the catalyst can be partially or fully restored by burning.

[0003] The existing hydrogenation catalyst sulfur-burning and carbon-burning regeneration process is prone to overheating in local temperature zones when treating high-sulfur and high-carbon catalysts. The high-temperature zone has a large amount of waste gas, while the low-temperature zone has a small amount of waste gas. When the exhaust gas volume is increased, the high-temperature zone has a small amount of waste gas, making it difficult to cool down. In order to control the high-temperature zone from overheating, the load can only be reduced, which seriously limits production. Summary of the invention

[0004] The object of the present invention is to provide an exhaust gas circulation type partitioned catalyst regeneration device to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] The present invention provides an exhaust gas circulation type partitioned catalyst regeneration device, characterized in that it includes a catalyst regeneration bed, an exhaust gas circulation oxygenation mechanism and an exhaust gas emission mechanism;

[0007] The catalyst regeneration bed comprises a shell, and the shell is divided into an upper and lower layer structure by a silicon carbide or quartz partition, wherein the upper layer and the lower layer are a regeneration channel and a heating channel respectively;

[0008] The catalyst regeneration bed further comprises a first metal conveyor belt and a second metal conveyor belt fixedly mounted in the regeneration channel, wherein the first metal conveyor belt and the second metal conveyor belt are arranged in upper and lower layers, and both ends of the first metal conveyor belt and the second metal conveyor belt extend to the outside of the regeneration channel respectively;

[0009] The catalyst regeneration bed also includes a partition evenly arranged inside the regeneration channel along the length direction thereof, the partition equally divides the regeneration channel into a plurality of independent chambers, and the partition is also reserved with an upper through groove and a lower through groove for the first metal conveyor belt and the second metal conveyor belt to pass through; the exhaust gas discharge mechanism includes a device for extracting the exhaust gas inside the independent chamber from the top thereof;

[0010] The exhaust gas circulation oxygenation component includes a high-temperature circulation fan and an exhaust component. The input pipe of the high-temperature circulation fan extends into an independent chamber, and the output pipe of the high-temperature circulation fan is connected to the exhaust component. The exhaust component includes a first exhaust part fixedly installed directly below the first metal conveyor belt and a second exhaust part fixedly installed directly below the second metal conveyor belt. The output pipe of the high-temperature circulation fan is connected to the exhaust component, and each exhaust component of the exhaust gas circulation oxygenation mechanism is connected to an oxidizing air inlet pipe.

[0011] Furthermore, the shell length is 42-50m, the number of partitions is 7, and the partitions are made of 304H stainless steel plates. Among them, the 7 partitions divide the regeneration channel into 8 independent chambers, the 4 independent chambers in the middle of the regeneration channel are high temperature zones, and the 2 independent chambers at both ends of the regeneration channel are low temperature zones.

[0012] Furthermore, the exhaust gas discharge mechanism includes four exhaust fans, wherein every two adjacent independent chambers are connected to the input end of an exhaust fan through a pipeline.

[0013] Further, the first exhaust section and the second exhaust section have the same structure, both comprising a first main pipe, a branch pipe, an inner pipe and a second main pipe, the first main pipe and the second main pipe are both arranged along the length direction of the regeneration channel, and the first main pipe and the second main pipe are respectively located on both sides of an independent chamber, wherein the first main pipe is evenly and vertically provided with the branch pipe along its length direction, the branch pipe is connected with the first main pipe, and the branch pipe is arranged horizontally, and the upper half of the branch pipe is evenly and vertically provided with the first exhaust pipe along its length direction; the second main pipe is evenly and vertically provided with an inner pipe corresponding to the branch pipe along its length direction, one end of the inner pipe is connected with the second main pipe, and the other end of the inner pipe extends into the corresponding branch pipe, the inner pipe is coaxially arranged with the corresponding branch pipe, an annular gap is provided between the inner wall of the branch pipe and the outer wall of the inner pipe, a second exhaust pipe coaxial with the first exhaust pipe is arranged on the inner pipe corresponding to the first exhaust pipe, and the second exhaust pipe is located inside the first exhaust pipe;

[0014] The first main pipe is connected to the oxidation air inlet pipe through a connecting pipeline, and the second main pipe is connected to the high-temperature circulation fan through a connecting pipeline.

[0015] Furthermore, the diameter of the top end of the second exhaust pipe decreases continuously from bottom to top to form a nozzle section.

[0016] Furthermore, a rotating ring is rotatably installed at the top end of the first exhaust pipe, and a wind shield column is coaxially arranged at the center of the rotating ring. The diameter of the bottom end of the wind shield column decreases continuously from top to bottom to form a pointed end, a spiral plate is connected between the outer wall of the wind shield column and the inner wall of the rotating ring, and the outer wall of the wind shield column of adjacent spiral plates and the inner wall of the rotating ring form a spiral channel, and fan blades are evenly arranged on the outside of the rotating ring.

[0017] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0018] 1. The present invention can continuously regenerate the catalyst.

[0019] 2. The present invention divides the regeneration channel into several independent chambers, each of which can independently control waste discharge, so that the temperature of each independent chamber can be adjusted according to the settings so that the regeneration temperature meets the technical requirements.

[0020] 3. The present invention can extract the high-temperature exhaust gas at the top of each independent chamber and introduce it into the exhaust assembly through the high-temperature circulation fan, and enter the bottom of the first metal conveyor belt and the second metal conveyor belt in layers from the first exhaust part and the second exhaust part of the exhaust assembly. Since the exhaust gas is circulated back into the regeneration channel, the temperature of the first metal conveyor belt and the second metal conveyor belt can be balanced and consistent, thereby improving the regeneration efficiency of the catalyst.

[0021] 4. The present invention can adaptively adjust the oxygen content of the oxidation air inlet pipe according to the power change of the high-temperature circulation fan in the high-temperature zone and the low-temperature zone (change in the exhaust gas circulation rate), so as to avoid excessive temperature in the medium and high temperature zones in the regeneration channel.

[0022] 5. During the air circulation in the independent chamber of the present invention, the high-temperature exhaust gas will hit the tip of the wind shield column after being discharged from the second exhaust pipe and enter the spiral channel. In the spiral channel, the high-temperature exhaust gas will mix with oxygen and cause the rotating ring to rotate. This process is conducive to the mixing of oxygen and high-temperature exhaust gas. During the rotation of the rotating ring, the fan blades on the outside of the rotating ring can make the air in the independent chamber flow upward from bottom to top, so that the temperature of the upper and lower air layers remains uniform.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0027] Figure 3 is a schematic diagram of the structure of the exhaust assembly of the present invention from a first viewing angle;

[0028] Figure 4 is a schematic diagram of the structure of the exhaust assembly of the present invention from a second viewing angle;

[0029] Figure 5 yes Figure 4 Schematic diagram of the local structure at A;

[0030] Figure 6 It is a schematic diagram of the structure of the first exhaust pipe and the second exhaust pipe of Example 2 of the present invention.

[0031] In the figure:

[0032] 11-shell; 12-regeneration channel; 13-heating channel; 14-first metal conveyor belt; 15-second metal conveyor belt; 16-partition; 21-high temperature circulation fan; 22-exhaust assembly; 221-first exhaust section; 222-second exhaust section; 31-oxidation air inlet pipe; 32-first main pipe; 33-branch pipe; 331-first exhaust pipe; 34-inner pipe; 341-second exhaust pipe; 35-second main pipe; 41-pipeline; 51-nozzle section; 52-rotating ring; 53-wind shield column; 54-tip; 55-spiral plate; 57-fan blades. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0034] Example 1, please refer to Figure 1-Figure 5 The present invention provides an exhaust gas circulation type partitioned catalyst regeneration device, including a catalyst regeneration bed, an exhaust gas circulation oxygenation mechanism and an exhaust gas emission mechanism; the present invention mainly recovers the deactivated catalyst whose active centers are covered due to surface coking and carbon deposition by burning, wherein the catalyst regeneration bed is used to place the deactivated catalyst, the exhaust gas circulation oxygenation mechanism is used to circulate air in the catalyst regeneration bed and provide oxygen during the air circulation process, so that the carbon and sulfur accumulated on the catalyst surface react with oxygen in the air under high temperature environment to become carbon dioxide and sulfur dioxide, and the exhaust gas emission mechanism is used to discharge the generated carbon dioxide and sulfur dioxide out of the catalyst regeneration bed.

[0035] Specifically, the catalyst regeneration bed includes a shell 11, and the shell 11 is divided into an upper and lower layer structure by a silicon carbide or quartz partition, wherein the upper layer and the lower layer are a regeneration channel 12 and a heating channel 13, respectively. The regeneration channel 12 is used to place the deactivated catalyst, and a plurality of natural gas burners (not shown) are installed in the heating channel 13. When in use, the plurality of natural gas burners provide heat to heat the deactivated catalyst in the regeneration channel 12 by thermal radiation.

[0036] The catalyst regeneration bed also includes a first metal conveyor belt 14 and a second metal conveyor belt 15 fixedly mounted in the regeneration channel 12, wherein the first metal conveyor belt 14 and the second metal conveyor belt 15 are arranged in upper and lower layers, and both ends of the first metal conveyor belt 14 and the second metal conveyor belt 15 extend to the outside of the regeneration channel 12 respectively. When in use, the catalyst is spread on the first metal conveyor belt 14 and the second metal conveyor belt 15 at one end of the regeneration channel 12 manually or by a feeding device, and then the first metal conveyor belt 14 and the second metal conveyor belt 15 gradually deliver the catalyst into the regeneration channel 12 for regeneration treatment. When the catalyst is discharged from one end of the regeneration channel 12, the regeneration treatment of the catalyst is completed, and the entire regeneration process of the catalyst can be carried out continuously, thereby improving the regeneration efficiency of the catalyst.

[0037] Since the carbon and sulfur accumulated on the catalyst react with oxygen in a highly exothermic process, the strong heat release will cause the internal partition of the regeneration channel 12 to be too high. In order to discharge the exhaust gas in time and avoid overheating of the local temperature zone of the regeneration channel 12, the catalyst regeneration temperature meets the technical requirements. The catalyst regeneration bed also includes a partition 16 evenly arranged inside the regeneration channel 12 along the length direction of the regeneration channel 12. The partition 16 divides the regeneration channel 12 into a number of independent chambers, and the partition 16 also has an upper groove and a lower groove reserved for the first metal conveyor belt 14 and the second metal conveyor belt 15 to pass through. The exhaust gas discharge mechanism includes a device for extracting the internal exhaust gas from the top of the independent chamber. When in use, the regeneration channel 12 is divided into a number of independent chambers, and each independent chamber can control the exhaust separately, so that the temperature of each independent chamber can be adjusted according to the setting, so that the regeneration temperature meets the technical requirements. Among them, in order to adjust the temperature of each independent chamber, a temperature sensor used in conventional technology can be installed in each independent chamber, and the temperature of each independent chamber can be monitored by the temperature sensor. When the temperature of an independent chamber is too high, the exhaust rate of the exhaust gas emission mechanism can be increased to reduce the temperature in the independent chamber.

[0038] Taking into account that the second metal conveyor belt 15 is close to the heating channel 13, the degree of radiant heat it receives will be higher than that of the first metal conveyor belt 14, which will cause uneven heating of the first metal conveyor belt 14 and the second metal conveyor belt 15, affecting the regeneration of the catalyst. For this reason, each independent chamber is connected to an exhaust gas circulation oxygenation mechanism, and the exhaust gas circulation oxygenation component includes a high-temperature circulation fan 21 and an exhaust component 22. The input pipe of the high-temperature circulation fan 21 extends into the independent chamber, and the output pipe of the high-temperature circulation fan 21 is connected to the exhaust component 22. The exhaust component 22 includes a first exhaust part 221 fixedly mounted directly below the first metal conveyor belt 14 and a second exhaust part 222 fixedly mounted directly below the second metal conveyor belt 15. The output pipe of the high-temperature circulation fan 21 is connected to the exhaust component 22, and the exhaust component 22 of each of the exhaust gas circulation oxygenation mechanisms is connected to an oxidizing air inlet pipe 31. When in use, the high-temperature circulation fan 21 can extract the high-temperature exhaust gas at the top of each independent chamber and introduce it into the exhaust component 22, and then enter the bottom of the first metal conveyor belt 14 and the second metal conveyor belt 15 in layers through the first exhaust part 221 and the second exhaust part 222 of the exhaust component 22. Since the exhaust gas circulates back into the regeneration channel 12, the temperature of the first metal conveyor belt 14 and the second metal conveyor belt 15 can be balanced and consistent, thereby improving the regeneration efficiency of the catalyst.

[0039] In addition, since the exhaust assembly 22 of each exhaust gas circulation oxygenation mechanism is connected to an oxidizing air intake pipe 31, oxygen can be entrained into each independent chamber during the exhaust gas circulation process, so that the catalyst and oxygen can be fully contacted to achieve the conditions for catalyst regeneration.

[0040] In a specific embodiment of the present invention, the length of the shell 11 is 42-50m, the number of the partitions 16 is 7, and the partitions 16 are made of 304H stainless steel plates, wherein the 7 partitions 16 divide the regeneration channel 12 into 8 independent chambers, the 4 independent chambers in the middle of the regeneration channel 12 are high temperature zones, and the 2 independent chambers at both ends of the regeneration channel 12 are low temperature zones. When the sulfur carbon on the catalyst to be regenerated is high, the low temperature zone and the high temperature zone respectively adopt the principle of low temperature desulfurization and the principle of high temperature desulfurization, and adjust the appropriate oxygen content.

[0041] In a specific embodiment of the present invention, the exhaust gas discharge mechanism includes four exhaust fans, wherein every two adjacent independent chambers are connected to the input end of an exhaust fan (not shown) through a pipeline 41.

[0042] As mentioned above, "the carbon and sulfur accumulated on the catalyst are in a strong exothermic process when reacting with oxygen", and this strong exotherm will cause the temperature of the high temperature zone in the regeneration channel 12 to be too high. For this reason, in a specific embodiment of the present invention, the first exhaust part 221 and the second exhaust part 222 have the same structure, both including a first main pipe 32, a branch pipe 33, an inner pipe 34 and a second main pipe 35. The first main pipe 32 and the second main pipe 35 are both arranged along the length direction of the regeneration channel 12, and the first main pipe 32 and the second main pipe 35 are respectively located on both sides of an independent chamber, wherein the first main pipe 32 is evenly and vertically arranged with the branch pipe 33 along its length direction, the branch pipe 33 is connected to the first main pipe 32, and the branch pipe 33 is connected to the first main pipe 32. The pipe 33 is horizontally arranged, and the upper half of the branch pipe 33 is uniformly provided with a first exhaust pipe 331 along its length direction; the second main pipe 35 is uniformly and vertically provided with an inner pipe 34 corresponding to the branch pipe 33 along its length direction, one end of the inner pipe 34 is connected to the second main pipe 35, and the other end of the inner pipe 34 extends into the corresponding branch pipe 33, the inner pipe 34 is coaxially arranged with the corresponding branch pipe 33, and an annular gap is provided between the inner wall of the branch pipe 33 and the outer wall of the inner pipe 34, and a second exhaust pipe 341 coaxial with the first exhaust pipe 331 is arranged on the inner pipe 34 corresponding to the first exhaust pipe 331, and the second exhaust pipe 341 is in the first exhaust pipe 331, and the specific reference is made to Figure 5 As shown;

[0043] The first main pipe 32 is connected to the oxidation air inlet pipe 31 through a connecting pipeline, and the second main pipe 35 is connected to the high-temperature circulation fan 21 through a connecting pipeline.

[0044] Based on the above design, the present invention can adaptively adjust the oxygen content of the oxidation air inlet pipe 31 according to the power change (change in the exhaust gas circulation rate) of the high-temperature circulation fan 21 in the high-temperature zone and the low-temperature zone, so as to avoid excessive temperature in the medium and high-temperature zones in the regeneration channel 12.

[0045] Specifically, during the regeneration process of the deactivated catalyst, the high-temperature exhaust gas at the top of the independent chamber is extracted by the high-temperature circulation fan 21 and injected into the second main pipes 35 of the first exhaust section 221 and the second exhaust section 222 respectively. After entering the second main pipe 35, the high-temperature exhaust gas will flow along the inner pipe 34 and be ejected from the second exhaust pipe 341 at high speed. At this time, the high-temperature exhaust gas ejected from the second exhaust pipe 341 at high speed will form a certain negative pressure area in the first exhaust pipe 331 (Bernoulli principle). The negative pressure area will generate suction, thereby causing the oxygen in the oxidation wind inlet pipe 31 to pass through the first main pipe 32 and the branch pipe 33 and be discharged from the first exhaust pipe 331. The oxygen from the first exhaust pipe 331 is entrained by the circulating high-temperature exhaust gas and contacts with the deactivated catalyst.

[0046] In the above process, as the power of the high-temperature circulation fan 21 increases, the flow rate of the high-temperature exhaust gas ejected from the second exhaust pipe 341 becomes faster, and accordingly, the negative pressure formed in the first exhaust pipe 331 becomes greater, and the oxygen content distributed by the oxidation air inlet pipe 31 into the first main pipe 32 becomes greater.

[0047] Based on the above, it can be known that in the actual catalyst regeneration process, the oxygen in the oxidizing air inlet pipe 31 can be reasonably allocated by increasing the power of the high-temperature circulation fan 21 in the low-temperature zone (i.e., increasing the air circulation speed in the low-temperature zone) and reducing the power of the high-temperature circulation fan 21 in the high-temperature zone (i.e., reducing the air circulation speed in the high-temperature zone), so as to reduce the oxygen content in the high-temperature zone, thereby reducing the sulfur-carbon reaction rate on the catalyst and avoiding excessively high temperatures in the high-temperature zone; increase the oxygen content in the low-temperature zone, thereby increasing the sulfur-carbon reaction rate of the catalyst and increasing the catalyst regeneration rate.

[0048] In the above process, the overall design of increasing the power of the high-temperature circulation fan 21 in the low-temperature zone and reducing the power of the high-temperature circulation fan 21 in the high-temperature zone can balance the temperature of the upper and lower layers in the high-temperature zone and the low-temperature zone under the premise of reducing energy consumption. Because the internal temperature of the high-temperature zone is relatively high, the temperature difference between the upper and lower layers does not change much (as the temperature increases, its density will decrease accordingly, and the air density in the high-temperature zone is relatively low, which means that the distance between air molecules is relatively large, and this distance is conducive to the rapid transfer of heat. Therefore, the temperature difference between the upper and lower layers in the high-temperature zone does not change much), the internal air circulation speed can be adaptively reduced to save the energy loss of the high-temperature circulation fan 21; and in the low-temperature zone, due to the low temperature and the large temperature difference between the upper and lower layers, the internal air circulation speed can be adaptively increased to ensure the temperature balance between the upper and lower layers.

[0049] Embodiment 2, as Figure 6 As shown, based on Example 1, the diameter of the top of the second exhaust pipe 341 decreases from bottom to top to form a nozzle section 51. Based on the above design, the flow rate of the air discharged from the second exhaust pipe 341 can be increased, so that sufficient negative pressure is formed in the first exhaust pipe 331.

[0050] In a specific embodiment of the present invention, a rotating ring 52 is rotatably mounted on the top of the first exhaust pipe 331, a wind shield column 53 is coaxially arranged at the center of the rotating ring 52, the bottom end diameter of the wind shield column 53 decreases from top to bottom to form a tip 54, a spiral plate 55 is connected between the outer wall of the wind shield column 53 and the inner wall of the rotating ring 52, and the outer wall of the wind shield column 53 of the adjacent spiral plate 55 and the inner wall of the rotating ring 52 form a spiral channel, and the outer side of the rotating ring 52 is evenly provided with fan blades 57. Based on the above design, during the air circulation in the independent chamber, the high-temperature exhaust gas will hit the tip 54 of the wind shield column 53 after being discharged from the second exhaust pipe 341 and enter the spiral channel, and the high-temperature exhaust gas will mix with oxygen in the spiral channel and cause the rotating ring 52 to rotate, which is conducive to the mixing of oxygen and high-temperature exhaust gas, and during the rotation of the rotating ring 52, the fan blades 57 on the outer side of the rotating ring 52 can make the air in the independent chamber flow upward from bottom to top, further keeping the air temperature of the upper and lower layers balanced.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An exhaust gas circulation type partitioned catalyst regeneration device, characterized in that: It includes a catalyst regeneration bed, an exhaust gas circulation oxygenation mechanism and an exhaust gas emission mechanism; The catalyst regeneration bed comprises a shell, and the shell is divided into an upper and lower layer structure by a silicon carbide or quartz partition, wherein the upper layer and the lower layer are a regeneration channel and a heating channel respectively; The catalyst regeneration bed further comprises a first metal conveyor belt and a second metal conveyor belt fixedly mounted in the regeneration channel, wherein the first metal conveyor belt and the second metal conveyor belt are arranged in upper and lower layers, and both ends of the first metal conveyor belt and the second metal conveyor belt extend to the outside of the regeneration channel respectively; The catalyst regeneration bed also includes a partition evenly arranged inside the regeneration channel along the length direction thereof, the partition equally divides the regeneration channel into a plurality of independent chambers, and the partition is also reserved with an upper through groove and a lower through groove for the first metal conveyor belt and the second metal conveyor belt to pass through; the exhaust gas discharge mechanism includes a device for extracting the exhaust gas inside the independent chamber from the top thereof; The exhaust gas circulation oxygenation mechanism includes a high-temperature circulation fan and an exhaust assembly, the input pipe of the high-temperature circulation fan extends into an independent chamber, the output pipe of the high-temperature circulation fan is connected to the exhaust assembly, the exhaust assembly includes a first exhaust portion fixedly mounted directly below the first metal conveyor belt and a second exhaust portion fixedly mounted directly below the second metal conveyor belt, the output pipe of the high-temperature circulation fan is connected to the exhaust assembly, and each exhaust assembly of the exhaust gas circulation oxygenation mechanism is connected to an oxidation air inlet pipe; The first exhaust section and the second exhaust section have the same structure, both comprising a first main pipe, a branch pipe, an inner pipe and a second main pipe, the first main pipe and the second main pipe are both arranged along the length direction of the regeneration channel, and the first main pipe and the second main pipe are respectively located on both sides of an independent chamber, wherein the first main pipe is evenly and vertically provided with the branch pipe along its length direction, the branch pipe is connected with the first main pipe, and the branch pipe is arranged horizontally, and the upper half of the branch pipe is evenly and vertically provided with the first exhaust pipe along its length direction; the second main pipe is evenly and vertically provided with an inner pipe corresponding to the branch pipe along its length direction, one end of the inner pipe is connected with the second main pipe, and the other end of the inner pipe extends into the corresponding branch pipe, the inner pipe is coaxially arranged with the corresponding branch pipe, an annular gap is provided between the inner wall of the branch pipe and the outer wall of the inner pipe, a second exhaust pipe coaxial with the first exhaust pipe is arranged on the inner pipe corresponding to the first exhaust pipe, and the second exhaust pipe is located inside the first exhaust pipe; The first main pipe is connected to the oxidation air inlet pipe through a connecting pipeline, and the second main pipe is connected to the high-temperature circulation fan through a connecting pipeline; The diameter of the top end of the second exhaust pipe decreases continuously from bottom to top to form a nozzle section.

2. The exhaust gas circulation type partitioned catalyst regeneration equipment according to claim 1 is characterized in that: The shell length is 42-50m, the number of partitions is 7, and the partitions are made of 304H stainless steel plates. Among them, the 7 partitions divide the regeneration channel into 8 independent chambers, the 4 independent chambers in the middle of the regeneration channel are high-temperature zones, and the 2 independent chambers at both ends of the regeneration channel are low-temperature zones.

3. The exhaust gas circulation type partitioned catalyst regeneration equipment according to claim 2 is characterized in that: The exhaust gas discharge mechanism comprises four exhaust fans, wherein every two adjacent independent chambers are connected to the input end of one exhaust fan through a pipeline.

4. The exhaust gas circulation type partitioned catalyst regeneration equipment according to claim 1 is characterized in that: A rotating ring is rotatably installed at the top of the first exhaust pipe, and a wind shield column is coaxially arranged at the center of the rotating ring. The diameter of the bottom end of the wind shield column decreases continuously from top to bottom to form a pointed end. A spiral plate is connected between the outer wall of the wind shield column and the inner wall of the rotating ring, and the outer walls of the wind shield columns of adjacent spiral plates and the inner wall of the rotating ring form a spiral channel, and fan blades are evenly arranged on the outside of the rotating ring.

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