Anti-blocking efficient circulating gas distributing device

Abstract

The utility model provides a kind of anti-blocking efficient circulating gas distribution device, involve chemical production equipment technical field, solve the technical deficiencies of the structure design of circulating gas distribution device of existing equipment, easy to block, bias flow when using, maintenance, inconvenient to handle, the technical scheme that is adopted includes: pedestal and gas distribution part, pedestal bottom is equipped with air inlet cavity, main body is equipped with first air inlet hole;Gas distribution part is detachably connected in the top of pedestal correspondingly, its main body is equipped with second air inlet hole, the upper end aperture of each second air inlet hole is all covered with gas distribution head, each gas distribution head is all equipped with gas distribution port, and the wall surface of gas distribution head is formed anti-blocking weir plate around gas distribution port.The air inlet, gas distribution head and gas distribution port of the utility model are evenly distributed, and the gas distribution effect is good, the anti-blocking weir plate prevents particulate matter from entering the gas distribution port, effectively prevents blocking and self-aggregation, and the gas distribution part can be replaced at any time when the gas distribution is abnormal, ensuring the continuous production, improving the efficiency of equipment maintenance and fault handling.

Description

Technical Field

[0001] This invention relates to the technical field of chemical production equipment for polypropylene (INEOS, UNIPOL, JPP, SPG, ST) and polyethylene, and more specifically to a clog-resistant and efficient circulating gas distribution device for gas distribution. Background Technology

[0002] In polyolefin (INEOS, UNIPOL, JPP, SPG, ST) or other reaction processes, reactors generally require a circulating gas distribution device to adjust components and reduce stirring power. However, conventional circulating gas distribution devices are prone to clogging and flow deviation, especially during emergency shutdowns of the circulating gas compressor or reaction unit. Solid particles can easily enter the inlet channel through the distribution port, leading to powder agglomeration and blockage. Circulating gas distribution devices are typically located at the bottom of the polymer powder fluidized bed within the reactor. Frequent blockages not only result in economic losses from start-up, shutdown, and maintenance, but also necessitate emptying the reactor each time, posing a safety risk during "reactor cleaning." This also causes significant material loss and waste, severely impacting production and causing substantial economic losses for the manufacturing company.

[0003] Therefore, existing gas distribution devices need to be improved to solve the above problems. Summary of the Invention

[0004] In summary, the purpose of this invention is to solve the problems of conventional circulating gas distribution devices in polyolefin or other reaction processes, which are prone to clogging and flow deviation. Especially when the circulating gas compressor stops suddenly or the reaction unit stops abruptly, powder particles on the fluidized bed can easily enter the inlet channel through the gas distribution port, causing self-aggregation and clogging. Furthermore, maintenance and handling are inconvenient, posing safety risks to the "boiler cleaning" process, and also causing significant material loss and waste. The invention provides a simple, easy-to-disassemble, convenient, and time-saving circulating gas distribution device that effectively prevents the self-aggregation and clogging of powder particles.

[0005] To address the shortcomings of the proposed technology, the following technical solution is adopted: a high-efficiency anti-clogging circulating gas distribution device, comprising a base and a distribution section. The base has an air inlet chamber at its bottom for circulating gas to enter, and its main body has several first air inlets vertically and evenly distributed around its axis, with their lower ends connected to the air inlet chamber. The distribution section is detachably connected to the top of the base, and its main body has several second air inlets that are sealed and connected to the first air inlets one by one. Each second air inlet has an air distribution head sealed and connected to the distribution section over its upper opening. Each air distribution head has at least three air distribution ports that spray air toward the upper surface of the distribution section. The wall surface around the air distribution ports of the air distribution head forms an anti-clogging weir plate to prevent particulate matter from being drawn back and causing blockage of the air distribution ports.

[0006] Furthermore, the air distribution head has a hollow horizontal T-shaped cavity structure, with the upper parts of the three ends of the T-shape extending outward to form extensions, and the air distribution port is opened at the bottom of the upper surface of the air distribution section corresponding to the extension.

[0007] Furthermore, the air distribution head is uniformly distributed in a scattering manner with the short side of its T-shaped cavity facing outward.

[0008] Furthermore, each of the aforementioned extensions has at least one air vent on its bottom.

[0009] Furthermore, the upper edge of the air distribution section is provided with an upward-expanding funnel-shaped guide edge.

[0010] Furthermore, at least one air distribution sealing ring is fitted onto the outer peripheral sidewall of the air distribution section.

[0011] Furthermore, a limiting structure is provided between the base and the air distribution section to facilitate precise positioning and docking of the first air inlet and the second air inlet.

[0012] Furthermore, the limiting structure includes positioning posts and positioning grooves. The positioning posts are vertically distributed on the upper surface of the base with the axis of the base as the center, and at least one positioning post sealing ring is sleeved on its outer wall. The positioning groove is an inner groove structure, which is evenly distributed on the bottom surface of the air distribution part and can be correspondingly and sealed to the positioning posts.

[0013] Furthermore, the positioning post is coaxial with the first air inlet, and the first air inlet passes through the positioning post upwards; the positioning groove is axial with the second air inlet cylinder, and the second air inlet passes through the positioning groove downwards.

[0014] Furthermore, the base and the air distribution section are detachably threadedly fixed together by a locking member.

[0015] The beneficial effects of this invention are as follows:

[0016] The gas distribution device of this invention consists of a base that can be easily assembled and a gas distribution part. In actual assembly and use, the gas distribution part is installed on the top of the base. The whole assembly is installed on the bottom of the reactor with the gas distribution part facing upwards through the base. It is suitable for use in both new and old production systems. It is easy to disassemble and use, and there is no need to empty the reactor, thus avoiding the waste of raw materials.

[0017] Meanwhile, if an abnormal air distribution problem occurs during continuous production, the faulty air distribution section can be removed from the base at any time and replaced with a spare air distribution section. This prevents production from being delayed due to cleaning the air distribution section, and also facilitates the troubleshooting and unblocking of the disassembled air distribution section, improving the efficiency of equipment maintenance and troubleshooting, and ensuring continuous and stable production.

[0018] Moreover, the air inlets on the base and air distribution section of the air distribution device of the present invention are evenly distributed, which ensures the stability and uniformity of the circulating air volume in each channel and effectively prevents abnormalities such as flow deviation during the air distribution process.

[0019] In addition, the air distribution port on the air distribution head of the present invention is designed to spray air towards the upper end face of the air distribution part. This design can form an anti-clogging weir plate on the wall surface of the air distribution head located around the air distribution port, preventing material backflow caused by the pressure drop in the air intake channel when the circulating air is interrupted. This effectively solves the problem of self-aggregation and blockage caused by the back suction of solid particles or powder, and reduces the failure rate of the air distribution device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the upper part of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the lower part of the overall structure of the present invention;

[0022] Figure 3 This is an exploded view of the overall structure of the present invention;

[0023] Figure 4 This is an exploded view of the air distribution head of the present invention;

[0024] Figure 5 Cross-sectional view of the overall structure of the present invention Figure 1 ;

[0025] Figure 6 Cross-sectional view of the overall structure of the present invention Figure 2 .

[0026] In the diagram: 1. Base, 11. First air inlet, 12. Positioning post, 121. Positioning post sealing ring, 13. First connecting hole, 131. Countersunk hole, 14. First sealing ring, 15. Second sealing ring, 2. Air distribution section, 21. Second air inlet, 22. Guide edge, 23. Air distribution section sealing ring, 24. Positioning groove, 25. Second connecting hole, 26. Third sealing ring, 3. Connecting part, 31. Assembly hole, 4. Air inlet chamber, 5. Air distribution head, 51. Air distribution port, 52. Anti-clogging weir plate, 53. Extension part, 6. Bolt, 7. Nut. Detailed Implementation

[0027] The structure of the present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0028] Reference Figures 1 to 2 As shown, the present invention provides a clog-resistant and efficient circulating gas distribution device, comprising a base 1 detachably mounted at a position below a polymer powder fluidized bed at the bottom of a reactor, and a gas distribution part 2 detachably mounted on the top of the base 1.

[0029] Specifically, the main body of the base 1 is cylindrical, and a connecting part 3 coaxial with it is integrally connected to the bottom of the main body. Several assembly holes 31 are provided on it. The base 1 is detachably assembled with the installation position at the bottom of the reactor through the connecting part 3 and the assembly holes 31.

[0030] Preferably, the connecting part 3 is a connecting flange, the outer diameter of which is larger than the outer diameter of the base 1, and the inner diameter of the connecting flange is smaller than the outer diameter of the base 1.

[0031] Specifically, an air intake chamber 4 for circulating air is formed between the inner ring of the connecting flange and the bottom surface of the base 1. Four first air intake holes 11 are vertically evenly distributed on the cylindrical main body of the base 1, with their lower ends connected to the air intake chamber 4.

[0032] Of course, in some other embodiments, the connecting part 3 may also be other structures, and the air intake cavity 4 may be formed by recessing inward along the bottom of the main body of the base 1.

[0033] Specifically, refer to Figures 3 to 4As shown, the main body of the air distribution section 2 has a flat cylindrical structure, and its diameter matches the diameter of the upper end face of the base 1. Four second air inlets 21 are opened through the main body of the air distribution section 2, which are sealed and connected to the four first air inlets 11 on the base 1. Each second air inlet 21 has an air distribution head 5 sealed and connected to the air distribution section 2. Each air distribution head 5 has at least three air distribution ports 51 that spray air towards the upper end face of the air distribution section 2. The wall surface of the air distribution head 5 around the air distribution ports 51 forms an anti-clogging weir plate 52 to prevent particulate matter from being sucked back and causing blockage of the air distribution ports 51.

[0034] By adopting the above technical solution, the present invention has the following beneficial effects.

[0035] The gas distribution device of the present invention consists of a base 1 and a gas distribution part 2 that can be easily assembled. In actual assembly and use, the gas distribution part 2 is installed on the top of the base 1. The whole assembly of the two is assembled on the bottom of the reactor with the gas distribution part 2 facing upward through the base 1. It is suitable for use in both new and old production systems. It is easy to disassemble and use, and there is no need to empty the reactor, thus avoiding the waste of raw materials.

[0036] Meanwhile, if an abnormal air distribution problem occurs during continuous production, the faulty air distribution part 2 can be removed from the base 1 at any time and replaced with a spare new air distribution part 2. This prevents production from being delayed due to cleaning the air distribution part 2, and also facilitates the troubleshooting and unblocking of the disassembled air distribution part 2, improving the efficiency of equipment maintenance and troubleshooting, and ensuring continuous and stable production.

[0037] Moreover, the air inlets on the base 1 and air distribution section 2 of the air distribution device of the present invention are evenly distributed, which ensures the stability and uniformity of the circulating air volume in each channel and effectively prevents abnormalities such as flow deviation during the air distribution process.

[0038] In addition, the air outlet 51 on the air distribution head 5 of the present invention is designed to spray air towards the upper end face of the air distribution part 2. This design can form an anti-clogging weir plate 52 on the wall surface of the air distribution head 5 around the air outlet 51, preventing material backflow caused by the pressure drop in the air inlet channel when the circulating air is interrupted. This effectively solves the problem of self-aggregation and blockage caused by the back suction of solid particles or powder, and reduces the failure rate of the air distribution device.

[0039] It should be noted that the shape and size of the base 1 and the air distribution part 2 in this embodiment are only a preferred embodiment of the present invention and are not a limitation on the base 1 and the air distribution part 2. In other embodiments, the shape and size of the air distribution part 2 and the base 1 can be designed according to the actual needs of the equipment.

[0040] As a further improvement to the technical solution adopted by the present invention to solve the technical problem it proposes, the present invention also includes the following technical features.

[0041] Furthermore, refer to Figure 1 , Figures 3 to 5 As shown, each air distribution head 5 connected to the upper end of the air distribution part 2 of the present invention has a hollow horizontal T-shaped cavity structure. The upper part of the three ends of the air distribution head 5 of the T-shape extends outward to form a horizontally protruding extension part 53. The air distribution port 51 is opened at the bottom of the upper surface of the air distribution part 2 corresponding to the extension part 53.

[0042] The T-shaped structure design of the air distribution head 5 of the present invention can evenly guide the circulating air entering through the upper opening of the second air inlet 21 to the three end positions of the air distribution head 5, so that the circulating air concentrated at the upper opening of the second air inlet 21 is evenly distributed radially outward, making the air distribution more uniform, avoiding mutual interference of the circulating air ejected from different air distribution ports 51, ensuring the jet flow rate and jet direction of the air distribution head 5, and improving the stability, continuity and reliability of the air distribution of the present invention.

[0043] Meanwhile, when the air distribution device of the present invention is installed, it is assembled with the air distribution part 2 facing upward. The air distribution port 51 is designed to spray air into the upper end face of the air distribution part 2. This allows the end of the air distribution head 5 to form an anti-clogging weir plate 52 on the wall around the air distribution port 51. The anti-clogging weir plate 52 formed by the upper end face and side wall of the extension part 53 can cover the air distribution port 51, thus preventing the powder particles on the upper polymer powder fluidized bed from entering the air distribution port 51 downward. The anti-clogging weir plate 52 formed by the side wall at the connection between the extension part 53 and the main body of the air distribution head 5 is located inside the air distribution port 51, so that a certain height difference is formed between the air distribution port 51 and the upper end face of the air distribution part 2. Even if the circulating air is interrupted or the pressure inside the air inlet is reduced during use, the powder particles will be blocked by the anti-clogging weir plate 52 at the connection between the extension part 53 and the main body of the air distribution head 5, thus preventing the powder particles from entering the air inlet upward.

[0044] The structural design of the air distribution head 5 of the present invention optimizes the injection direction and layout of the air distribution port 51, so that the wall surface of the air distribution head 5 around the air distribution port 51 forms an anti-clogging weir plate 52 that can prevent the back suction of powder particles. This effectively solves the problems of self-aggregation and blockage caused by the back suction of solid particles in the air distribution device during use, improves the reliability of the air distribution device of the present invention, extends the service life, and reduces the frequency of disassembly, maintenance and air passage clearing.

[0045] Furthermore, referring to the figure, the four air distribution heads 5 connected to the top of the air distribution part 2 of the present invention are evenly distributed in a scattering manner with the short side of their T-shaped cavities facing outward.

[0046] The distribution method of the gas distribution head 5 of the present invention can evenly distribute the circulating gas introduced by the four air inlets to the upper end face of the gas distribution part 2 through a total of 12 gas distribution ports 51, thereby facilitating uniform diffusion at the bottom of the circulating gas phase reactor, which is beneficial to the fluidization of polymer powder in the reactor, further promoting the polymerization reaction and improving the yield.

[0047] Furthermore, referring to the figure, each air distribution head 5 of the present invention has an extension 53 with at least one air distribution port 51 provided on its bottom.

[0048] In this embodiment, the air distribution port 51 adopts a rectangular opening structure design, and there is only one port occupying the entire bottom of the extension 53. This design ensures that the opening area of ​​the air distribution port 51 is large enough to maximize the air distribution efficiency of the circulating air and ensure the air distribution effect. In other embodiments, the number of air distribution ports 51 can be increased to two or more, arranged or arranged in other ways on the bottom surface of the extension 53. The opening shape of the air distribution port 51 can also be improved according to actual usage requirements, and can be a circular hole, a strip, or other shapes such as an outwardly flared funnel.

[0049] It should be noted that the more air distribution ports 51 there are, the smaller their opening area, making them less prone to clogging by solid particles such as powder. Simultaneously, the circulating air distribution becomes more uniform. Furthermore, as the number of air distribution ports 51 increases, the internal pressure of the air inlets is relatively higher, resulting in greater momentum of the circulating air jet and better fluidization of the powder. However, conversely, as the number of air distribution ports 51 increases, the total amount of air distributed per unit time is less than that of a single large-opening air distribution port 51. Therefore, adjustments need to be made according to actual usage requirements.

[0050] Furthermore, refer to Figure 5 As shown, the upper edge of the air distribution part 2 of the present invention is provided with an outwardly flared guide edge 22.

[0051] The air distribution port 51 on the air distribution head 5 of the present invention is set downward. The circulating air sprayed out is directly sprayed onto the upper end surface of the air distribution part 2, and is then blocked by the upper end surface of the air distribution part 2 and evenly distributed upward in the opposite direction. At this time, the structural design of the guide edge 22 plays a guiding role in expanding the circulating air, making the area of ​​the circulating air diffusion outward larger and the distribution more uniform, thus improving the air distribution effect of the present invention.

[0052] Furthermore, refer to Figures 5 to 6 As shown, at least one gas distribution sealing ring 23 is fitted on the outer peripheral sidewall of the gas distribution part 2 of the present invention. In actual assembly, the gas distribution part 2 achieves a seal with the installation position at the bottom of the reactor through the gas distribution sealing ring 23, thereby reducing the installation gap of the gas distribution device of the present invention, ensuring reliable sealing, and effectively preventing fine powder from entering the equipment gap.

[0053] Furthermore, refer to Figure 3 and Figure 5 As shown, the base 1 and the air distribution part 2 of the air distribution device of the present invention are provided with a limiting structure to facilitate the precise positioning and docking of the first air inlet 11 and the second air inlet 21.

[0054] Since the base 1 and the air distribution part 2 of the air distribution device of the present invention are detachable structures, when the two are assembled, it is necessary to ensure that the first air inlet 11 and the second air inlet 21 are accurately sealed and connected in order to realize the air distribution of circulating air. Therefore, it is necessary to provide a limiting structure to improve the speed of accurate connection of the air inlet, thereby improving the efficiency when replacing the air distribution part 2.

[0055] Preferably, the limiting structure includes positioning posts 12 and positioning grooves 24. The positioning posts 12 are vertically distributed on the upper surface of the base 1 with the axis of the base 1 as the center, and at least one positioning post sealing ring 121 is sleeved on its outer wall. The positioning grooves 24 are internal groove structures, evenly distributed on the bottom surface of the air distribution part 2, and can be correspondingly and sealingly sleeved on the positioning posts 12.

[0056] Furthermore, refer to Figure 3 and Figure 5 As shown, the positioning post 12 of the limiting structure of the present invention is coaxial with the first air inlet 11 on the base 1, and the first air inlet 11 passes through the positioning post 12 upward. At the same time, the positioning groove 24 of the limiting structure of the present invention is aligned with the cylinder axis of the second air inlet 21 on the air distribution part 2, and the second air inlet 21 passes through the positioning groove 24 downward.

[0057] In actual use, regardless of the position at which the positioning slot 24 and the positioning column 12 are connected, the first air inlet 11 and the second air inlet 21 can be accurately connected, realizing quick alignment between the air distribution section 2 and the base 1, improving the efficiency of replacing the air distribution section 2, avoiding long-term equipment shutdown, and reducing the impact on production caused by replacing the air distribution section 2.

[0058] Furthermore, the base 1 and the air distribution part 2 of the air distribution device of the present invention are detachably threadedly fixedly connected by a locking member.

[0059] Specifically, refer to Figure 3 and Figure 6 As shown, four first connecting holes 13 are vertically and evenly distributed on the main body of the base 1 with their axis as the center. Each first connecting hole 13 has a recessed countersunk hole 131 at the lower end of the air inlet chamber 4 end face of the base 1. A first sealing ring 14 is provided at the upper opening of each countersunk hole 131. A second sealing ring 15 is provided at the upper opening of each first connecting hole 13 at the upper end face of the base 1.

[0060] Specifically, the main body of the air distribution section 2 has four second connecting holes 25 that correspond one-to-one with the first connecting hole 13. Each second connecting hole 25 is provided with a third sealing ring 26 at the upper opening of the upper surface of the air distribution section 2.

[0061] The locking component of this invention includes a bolt 6 and a mating nut 7. When assembling the base 1 and the air distribution part 2, precise alignment and connection between the two are first achieved through the positioning pin 12 and the positioning groove 24. After alignment, the first connecting hole 13 and the second connecting hole 25 are naturally aligned. Then, the bolt 6 passes through the first connecting hole 13 and the second connecting hole 25 sequentially from bottom to top, and is locked by the nut 7, thereby locking and fixing the air distribution part 2 and the base 1. After locking, the gaps between the base 1, the air distribution part 2 and the locking component are sealed by the first sealing ring 14, the second sealing ring 15 and the third sealing ring 26, preventing circulating air from leaking out through the connecting holes and also preventing fine powder and other particles from entering the equipment gaps.

[0062] The present invention uses a locking component to thread-fix the base 1 and the air distribution part 2, which has a simple structure, is easy to disassemble and assemble, and significantly improves the efficiency of replacing the air distribution part 2.

[0063] The above embodiments are merely for illustrating one specific implementation of the present invention and are not intended to limit the scope of the invention. Those skilled in the art can deduce and summarize other adjustments or modifications to the base 1, air distribution section 2, air inlet chamber 4, air inlet hole, air distribution head 5, air distribution port 51, anti-clogging weir plate 52, guide edge 22, air distribution section sealing ring 23, limiting structure, locking component, etc., based on the present invention, which will not be listed here. Any modifications, substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A clog-resistant and highly efficient circulating gas distribution device, characterized in that, The device includes a base and an air distribution section. The base has an air intake chamber at its bottom for circulating air to enter. Several first air intake holes, vertically distributed around its axis and connected to the air intake chamber at their lower ends, are formed through the base. The air distribution section is detachably connected to the top of the base. Several second air intake holes, each sealingly connected to one of the first air intake holes, are formed through the base. Each second air intake hole has an air distribution head sealed to the air distribution section at its upper opening. Each air distribution head has at least three air outlets that spray air towards the upper surface of the air distribution section. The wall surrounding the air outlets of the air distribution head forms an anti-clogging weir plate to prevent particulate matter from being drawn back and causing blockage. The air distribution head has a hollow, horizontal T-shaped cavity structure. The upper parts of the three ends of the T-shape extend outwards to form extensions. The air outlets are located at the bottom of the extensions corresponding to the upper surface of the air distribution section. The upper edge of the air distribution section is provided with an upward-expanding funnel-shaped guide edge.

2. The anti-clogging and high-efficiency circulating gas distribution device according to claim 1, characterized in that, The air distribution head is uniformly distributed in a scattering pattern with the short side of its T-shaped cavity facing outwards.

3. The anti-clogging and high-efficiency circulating gas distribution device according to claim 1, characterized in that, Each of the aforementioned extensions has at least one air vent on its bottom.

4. The anti-clogging and high-efficiency circulating gas distribution device according to claim 1, characterized in that, At least one air distribution sealing ring is fitted on the outer peripheral sidewall of the air distribution section.

5. The anti-clogging and high-efficiency circulating gas distribution device according to claim 1, characterized in that, The base and the air distribution section are provided with a limiting structure to facilitate the precise positioning and docking of the first air inlet and the second air inlet.

6. The anti-clogging and high-efficiency circulating gas distribution device according to claim 5, characterized in that, The limiting structure includes positioning posts and positioning grooves. The positioning posts are vertically distributed on the upper surface of the base with the axis of the base as the center, and at least one positioning post sealing ring is sleeved on its outer wall. The positioning groove is an inner groove structure, which is evenly distributed on the bottom surface of the air distribution part and can be correspondingly and sealed to the positioning posts.

7. The anti-clogging and high-efficiency circulating gas distribution device according to claim 6, characterized in that, The positioning post is coaxial with the first air inlet, and the first air inlet passes through the positioning post upward; the positioning groove is coaxial with the second air inlet, and the second air inlet passes through the positioning groove downward.

8. The anti-clogging and high-efficiency circulating gas distribution device according to claim 1, characterized in that, The base and the air distribution section are detachably and threadedly fixed together by a locking member.

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