Anti-suck type main air distribution pipe

Abstract

The utility model discloses a kind of anti-suckback type main wind distribution pipe, including body mechanism and buffer mechanism, the body mechanism includes pedestal, distribution pipe fixedly installed in pedestal middle part, main wind pipe fixedly sleeved in distribution pipe top end, side branch pipe fixedly sleeved in distribution pipe side, air distribution pipe evenly sleeved in the both sides of side branch pipe, air distribution nozzle one fixedly sleeved in the both sides of air distribution pipe, the buffer mechanism includes buffer pipe slidingly sleeved in the inside of air distribution pipe.In the utility model, by being set as inclined upward to air distribution pipe, and slidingly connecting buffer pipe in it, while connecting counterweight wheel for counterweight at buffer pipe bottom, so when the pressure in air distribution pipe is greater than threshold value, buffer pipe is pushed out to air distribution pipe outside, until air distribution nozzle two on buffer pipe again with air distribution nozzle one corresponding on, i.e. can reduce the pressure in air distribution pipe, realize balance, avoid that catalyst abrasion is caused by excessive pressure, improve the practicability of device.

Description

Technical Field

[0001] This utility model relates to the field of catalyst regeneration technology, specifically to an anti-backflow main air distribution pipe. Background Technology

[0002] In catalytic cracking (FCC) and fluidized bed methanol-to-olefins (MTO) processes, the coke generated after the reaction adheres to the catalyst, reducing its activity. To ensure catalyst activity, air (main air) needs to be introduced into the regenerator to burn off the coke. The regenerator's coke-burning capacity is closely related to the design of the main air distributor. The main air distributor must meet requirements such as uniform main air distribution, low pressure drop, and minimal catalyst wear to prevent uneven main air distribution, dilute phase tail combustion, and increased catalyst fine powder content, which would affect the unit's processing capacity and product yield. Existing industrial air distributors mainly come in two forms: main air distribution plates and main air distribution pipes. However, in large-scale installations where the regenerator diameter can reach tens of meters, the use of main air distribution plates is limited, and main air distribution pipes are often used to achieve uniform main air distribution. Currently used main air distribution pipes are mostly dendritic, consisting of a main pipe, branch pipes, and air distribution nozzles. The air distribution nozzles typically have a small orifice diameter for throttling and pressure storage, creating a certain pressure drop through the orifice, while the larger orifice diameter is used to reduce the outlet gas linear velocity and prevent catalyst wear. However, existing air distribution nozzles are of a fixed number. Therefore, when the main gas pipe pressure increases, the fixed number of nozzles leads to an increase in orifice pressure, ultimately causing catalyst wear, which presents a problem. To address this, an anti-backflow main air distribution pipe is proposed. Utility Model Content

[0003] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, the technical solution adopted by this utility model is as follows:

[0005] A backflow prevention main air distribution pipe includes a main body and a buffer mechanism. The main body includes a base, a distribution pipe fixedly installed in the middle of the base, a main air pipe fixedly sleeved at the top of the distribution pipe, a side branch pipe fixedly sleeved on the side of the distribution pipe, a distribution pipe evenly sleeved on both sides of the side branch pipe, and a first distribution nozzle fixedly sleeved on both sides of the distribution pipe. The buffer mechanism includes a buffer pipe slidably sleeved inside the distribution pipe, a second distribution nozzle fixedly sleeved on both sides of the buffer pipe, a slide rod fixedly connected to the bottom of the buffer pipe, a counterweight wheel rotatably connected to the bottom of the slide rod, and a limit buckle fixedly installed on the inner wall of the distribution pipe and slidably connected to the slide rod.

[0006] Preferably, a one-way valve is installed on the inner wall of the main air duct, and the one-way valve is guided from top to bottom.

[0007] Preferably, the first air distribution nozzle and the second air distribution nozzle have the same structure, and the distance between adjacent first air distribution nozzles is equal to the distance between adjacent second air distribution nozzles.

[0008] Preferably, the slide rods are arranged in pairs, with each pair of slide rods corresponding to one buffer tube.

[0009] Preferably, the length of the air distribution duct is shorter as it gets closer to the distribution pipe, and the number of side branch pipes is four.

[0010] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0011] In this invention, by setting the air distribution pipe to be inclined upward and slidingly connecting a buffer pipe therein, and connecting a counterweight wheel to the bottom of the buffer pipe for counterweight, when the pressure inside the air distribution pipe is greater than a threshold, the buffer pipe is pushed out of the air distribution pipe until the second air distribution nozzle on the buffer pipe aligns with the first air distribution nozzle again, thereby reducing the pressure inside the air distribution pipe, achieving balance, avoiding excessive pressure that could cause catalyst wear, and improving the practicality of the device. Attached Figure Description

[0012] Figure 1 This is a top view schematic diagram of one embodiment of the present utility model;

[0013] Figure 2 This is a cross-sectional schematic diagram of one embodiment of the present invention.

[0014] Figure label:

[0015] 110. Base; 120. Distribution duct; 130. Main air duct; 131. One-way valve; 140. Side branch duct; 150. Air distribution duct; 160. Air distribution nozzle one;

[0016] 210. Buffer tube; 220. Air distribution nozzle 2; 230. Slide rod; 240. Counterweight wheel; 250. Limit buckle. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0018] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing an anti-backflow main air distribution pipe.

[0019] Example:

[0020] Combination Figure 1-2As shown, this utility model provides an anti-backflow main air distribution pipe, including a main body and a buffer mechanism. The main body includes a base 110, a distribution pipe 120 fixedly installed in the middle of the base 110, a main air pipe 130 fixedly sleeved at the top of the distribution pipe 120, a side branch pipe 140 fixedly sleeved on the side of the distribution pipe 120, a distribution pipe 150 evenly sleeved on both sides of the side branch pipe 140, and a distribution nozzle 160 fixedly sleeved on both sides of the distribution pipe 150. A one-way valve 131 is installed on the inner wall of the main air pipe 130. The one-way valve 131 guides from top to bottom. The length of the distribution pipe 150 is shorter as it gets closer to the distribution pipe 120, and the side branch pipe... There are four 140s. The buffer mechanism includes a buffer tube 210 that is slidably sleeved inside the air distribution tube 150, two air distribution nozzles 220 that are fixedly sleeved on both sides of the buffer tube 210, a slide rod 230 that is fixedly connected to the bottom end of the buffer tube 210, a counterweight wheel 240 that is rotatably connected to the bottom end of the slide rod 230, and a limit buckle 250 that is fixedly installed on the inner wall of the air distribution tube 150 and slidably connected to the slide rod 230. The first air distribution nozzle 160 and the second air distribution nozzle 220 have the same structure, and the distance between adjacent first air distribution nozzles 160 is equal to the distance between adjacent second air distribution nozzles 220. The two slide rods 230 are grouped together, and one group of slide rods 230 corresponds to one buffer tube 210.

[0021] Specifically, the buffer tube 210 is set to be inclined upwards, so that its internal structure will be affected by gravity. Therefore, when the internal pressure of the air distribution tube 150 decreases, the buffer tube 210 will be affected by the gravity of the counterweight wheel 240, causing it to slide down into the air distribution tube 150. When the pressure increases, it will push the buffer tube 210 out of the air distribution tube 150, realizing adaptive adjustment and improving the practicality of the device.

[0022] The working principle and usage process of this utility model are as follows: First, install the device and connect the main air duct 130 to the air duct to start air distribution. The air is evenly blown to the required position through the air distribution nozzle 160. When the air force injected into the main air duct 130 increases, the pressure increases. At this time, the air distribution nozzle 160 cannot release the current pressure, so it will push the buffer tube 210 upward, so that the air distribution nozzle 220 on the buffer tube 210 is exposed to the outside of the air distribution duct 150, increasing the exhaust port and thus reducing the pressure. Finally, when the pressure is restored, the buffer tube 210 returns to its original position under the gravity of the counterweight wheel 240.

[0023] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A backflow prevention type main air distribution pipe, characterized in that, include: Main structure and buffer structure; The main structure includes a base (110), a distribution pipe (120) fixedly installed in the middle of the base (110), a main air pipe (130) fixedly sleeved at the top of the distribution pipe (120), a side branch pipe (140) fixedly sleeved on the side of the distribution pipe (120), a distribution air pipe (150) evenly sleeved on both sides of the side branch pipe (140), and a distribution air nozzle (160) fixedly sleeved on both sides of the distribution air pipe (150). The buffer mechanism includes a buffer tube (210) that is slidably sleeved inside the air distribution tube (150), two air distribution nozzles (220) that are fixedly sleeved on both sides of the buffer tube (210), a slide rod (230) that is fixedly connected to the bottom end of the buffer tube (210), a counterweight wheel (240) that is rotatably connected to the bottom end of the slide rod (230), and a limit buckle (250) that is fixedly installed on the inner wall of the air distribution tube (150) and slidably connected to the slide rod (230).

2. The anti-suckback main air distribution tube according to claim 1, characterized in that A one-way valve (131) is installed on the inner wall of the main air duct (130), and the one-way valve (131) is guided from top to bottom.

3. The anti-suckback main air distribution tube according to claim 1, characterized in that, The first air distribution nozzle (160) and the second air distribution nozzle (220) have the same structure, and the distance between adjacent first air distribution nozzles (160) is equal to the distance between adjacent second air distribution nozzles (220).

4. The anti-suckback main air distribution tube according to claim 1, characterized in that, The slide rods (230) are in pairs, and each pair of slide rods (230) corresponds to one buffer tube (210).

5. The anti-suckback main air distribution tube according to claim 1, characterized in that, The length of the air distribution duct (150) is shorter as it gets closer to the distribution duct (120), and the number of side branch ducts (140) is four.

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