Reactor gas phase pipeline dredging device

Abstract

The utility model relates to a reaction kettle gas-phase pipeline dredging device, which belongs to the technical field of reaction kettle gas-phase pipeline dredging and comprises a fixing ring, a first annular groove is arranged on the inner circumferential wall of the fixing ring, chamfers are arranged on two sides of the first annular groove along the axis direction of the fixing ring, a plurality of cleaning strips are arranged in the first annular groove, and the cleaning strips are arranged on the inner circumferential wall of the fixing ring. The multiple cleaning strips are circumferentially distributed with the axis of the fixing ring as the center, a gap is formed between every two adjacent cleaning strips, the cleaning strips are in an arc shape, and a driving part is arranged on the outer side of the fixing ring and used for driving the cleaning strips to move in the axis direction of the fixing ring; the driving part comprises a magnetic ring and a plurality of guide rods, the magnetic ring is coaxially and movably arranged on the peripheral wall of the fixing ring in a sleeving mode, the guide rods are movably sleeved with sliding blocks, and the sliding blocks are connected with the magnetic ring. And dredging of the gas-phase pipeline is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of reaction kettle gas phase pipeline dredging devices, belong to reaction kettle gas phase pipeline dredging technical field. BACKGROUND

[0002] Polyester production process generally refers to the process of forming polyester plastics by polymerizing monomers through chemical reaction. The most common polyester is polyethylene terephthalate (PET), and the production process of polyester includes the preparation of raw materials, esterification reaction, polycondensation reaction, cooling and granulation, and post-processing steps. By controlling the reaction conditions (such as temperature, time and vacuum, etc.), polyester products with different properties can be obtained to meet the needs of various applications

[0003] In the polyester production process, the reaction kettle is a commonly used device for polycondensation reaction. The polycondensation reaction produces a large amount of tail gas, and the main component of the tail gas is ethylene glycol mixed steam. A large amount of polyethylene terephthalate with low degree of polymerization is entrained in the tail gas. After being carried out by the gas flow, part of the low polymers are cooled and precipitated in the scraper condenser, and part of them enter the steam jet pump along the pre-polycondensation vacuum gas phase line. The material carried by the gas flow adheres to the wall of the gas phase line, causing the inner diameter of the gas phase line of the reaction kettle to decrease. The pre-polycondensation mixed steam outlet pipe is blocked first, the vacuum degree becomes poor, the device operation time is shortened, and in severe cases, the device is forced to shut down, which poses a great threat to the stable production of polyester.

[0004] Therefore, there is a need for a reaction kettle gas phase pipeline dredging device to dredge the reaction kettle gas phase pipeline. SUMMARY

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a reaction kettle gas phase pipeline dredging device for dredging the reaction kettle gas phase pipeline.

[0006] The utility model solves the above problems by adopting the following technical scheme: a reaction kettle gas phase pipeline dredging device, comprising a fixed ring, a first annular groove is arranged on the inner peripheral wall of the fixed ring, a chamfer is arranged on both sides of the fixed ring in the axial direction of the fixed ring, a plurality of cleaning strips are arranged in the first annular groove, the plurality of cleaning strips are distributed in the circumferential direction with the axis of the fixed ring as the center, a gap is arranged between adjacent two cleaning strips, the cleaning strip is arc-shaped, a driving member is arranged on the outside of the fixed ring, and the driving member is used to drive the cleaning strip to move in the axial direction of the fixed ring.

[0007] The driving member comprises a magnetic ring and a plurality of guide rods, the magnetic ring is coaxially movably sleeved on the outer peripheral wall of the fixed ring, a sliding block is movably sleeved on the guide rod, the sliding block is connected with the magnetic ring, and an adsorption block is arranged in the cleaning strip.

[0008] Preferably, the number of cleaning strips is two.

[0009] Preferably, the material used to make the adsorption block is iron.

[0010] Preferably, the magnetic ring is provided with a second annular groove, which is coaxially arranged with the fixed ring. Multiple balls are embedded in the second annular groove, and the multiple balls correspond one-to-one with multiple sliders and are fixedly connected.

[0011] Preferably, a scraper is provided between two adjacent cleaning strips, and the scraper is located in the first annular groove.

[0012] Preferably, multiple guide rods are circumferentially distributed with the magnetic ring as the center.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This utility model discloses a device for unblocking the gas phase pipeline of a reactor. By moving the end-to-end cleaning strips inside the gas phase pipeline, the material inside the gas phase pipeline is scraped off, thereby unblocking the gas phase pipeline. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation structure of a gas phase pipeline unblocking device for a reaction vessel according to the present invention;

[0016] Figure 2 for Figure 1 Enlarged view of part A;

[0017] Figure 3 This is a schematic diagram of the connection structure between the fixing ring and the cleaning strip.

[0018] The components include: 1. Fixing ring; 2. Cleaning strip; 3. Magnetic ring; 4. Guide rod; 5. Slider; 6. Adsorption block; 7. Ball bearing; 8. Scraper; and 9. Pipe section. Detailed Implementation

[0019] like Figures 1-3 As shown, a reactor gas phase pipeline unblocking device in this embodiment includes a fixed ring 1. A first annular groove is provided on the inner peripheral wall of the fixed ring 1. The first annular groove is coaxially arranged with the fixed ring 1. Chamfers are provided on both sides of the first annular groove along the axial direction of the fixed ring 1. A plurality of cleaning strips 2 are provided in the first annular groove. The plurality of cleaning strips 2 are distributed circumferentially with the axis of the fixed ring 1 as the center. A gap is provided between two adjacent cleaning strips 2. The cleaning strips 2 are arc-shaped. The specific number of cleaning strips 2 is two. A driving member is provided on the outer side of the fixed ring 1. The driving member is used to drive the cleaning strips 2 to move along the axial direction of the fixed ring 1.

[0020] During installation, the gas phase pipeline is divided into two pipe sections 9, which are coaxially fixed at both ends of the fixed ring 1, wherein the inner diameter of the pipeline is equal to the inner diameter of the fixed ring 1, and the outer diameter of the pipeline is equal to the outer diameter of the fixed ring 1;

[0021] During operation, the cleaning ring is moved along the axis of the fixed ring 1 by the driving member, and when the cleaning strip 2 moves out of the first annular groove, the outer peripheral wall of the cleaning ring is attached to the inner peripheral wall of the fixed ring 1. Through calculation, the ends of the adjacent two cleaning strips 2 abut against each other, and the cleaning strips 2 are connected end to end to form a ring structure, and the outer diameter of the ring structure is equal to the inner diameter of the pipe section 9. When the ring structure moves into the pipeline with the continuous movement of the cleaning strip 2, the ring structure can scrape off the material adhering to the pipeline, thereby achieving the dredging of the gas phase pipeline;

[0022] After dredging, the cleaning strip 2 is moved into the first annular groove by the driving member, and a gap is formed between the adjacent two cleaning strips 2;

[0023] The driving member includes a magnetic ring 3 and a plurality of guide rods 4. The magnetic ring 3 is coaxially movably sleeved on the outer peripheral wall of the fixed ring 1, and the plurality of guide rods 4 are evenly distributed in the circumferential direction of the magnetic ring 3. A sliding block 5 is movably sleeved on the guide rod 4, and the sliding block 5 is connected with the magnetic ring 3. An adsorption block 6 is arranged in the cleaning strip 2, and the adsorption block 6 is made of iron;

[0024] During installation, the two ends of the guide rod 4 are connected with the outer walls of the two pipe sections 9, and the guide rod 4 is located outside the pipeline;

[0025] When the cleaning strip 2 needs to be moved, the sliding block 5 moves along the axis of the fixed ring 1 on the guide rod 4, and the movement of the sliding block 5 drives the synchronous movement of the magnetic ring 3. Due to the adsorption force between the magnetic ring 3 and the adsorption block 6, the adsorption block 6 moves synchronously, i.e. the cleaning strip 2 moves synchronously. Here, the sliding block 5 can be manually moved or electrically moved, and through the cooperation between the sliding block 5 and the guide rod 4, the effect of guiding is achieved. When the cleaning strip 2 moves into the first annular groove, a gap is formed between the adjacent two cleaning strips 2 by the attractive force between the magnetic ring 3 and the adsorption block 6;

[0026] The magnetic ring 3 is provided with a second annular groove, the second annular groove is coaxially arranged with the fixed ring 1, a plurality of balls 7 are embedded in the second annular groove, the plurality of balls 7 are one-to-one corresponding and fixedly connected with the plurality of sliding blocks 5, a scraping strip 8 is arranged between the adjacent two cleaning strips 2, the scraping strip 8 is located in the first annular groove, when the gas phase pipeline is dredged and the cleaning strip 2 is moved into the first annular groove, at this time, a gap is generated between the adjacent two cleaning strips 2, then, the magnetic ring 3 is rotated, the adsorption block 6 drives the cleaning strip 2 to rotate synchronously through the adsorption force between the adsorption block 6 and the magnetic ring 3, at this time, the material on the inner circumferential wall of the cleaning strip 2 is scraped off through the scraping strip 8, the cleaning of the cleaning strip 2 itself is realized, here, the magnetic ring 3 can be manually rotated or electrically rotated.

[0027] In addition to the above-mentioned embodiments, the utility model also includes other implementation manners, and the technical scheme formed by using equivalent transformation or equivalent replacement should fall into the protection scope of the utility model claim.

Claims

1. A reactor gas phase line purging device, characterized by: The fixed ring (1) is provided with a first annular groove on the inner peripheral wall, the two sides of the first annular groove along the axis direction of the fixed ring (1) are provided with chamfers, a plurality of cleaning strips (2) are arranged in the first annular groove, the plurality of cleaning strips (2) are distributed in a circumferential direction with the axis of the fixed ring (1) as the center, a gap is arranged between adjacent two cleaning strips (2), the cleaning strip (2) is arc-shaped, a driving member is arranged on the outer side of the fixed ring (1), and the driving member is used for driving the cleaning strip (2) to move along the axis direction of the fixed ring (1); The driving member comprises a magnetic ring (3) and a plurality of guide rods (4), the magnetic ring (3) is coaxially movably sleeved on the outer peripheral wall of the fixed ring (1), the guide rod (4) is movably sleeved with a sliding block (5), the sliding block (5) is connected with the magnetic ring (3), and the cleaning strip (2) is provided with an adsorption block (6).

2. A reactor gas line purging device according to claim 1, wherein: The specific number of the cleaning strip (2) is two.

3. The apparatus of claim 1, wherein: The material of the adsorption block (6) is iron.

4. The apparatus of claim 1, wherein: The magnetic ring (3) is provided with a second annular groove, the second annular groove is coaxially arranged with the fixed ring (1), a plurality of balls (7) are embedded in the second annular groove, and the plurality of balls (7) are one-to-one corresponding and fixedly connected with the plurality of sliding blocks (5).

5. The apparatus of claim 1, wherein: A scraping strip (8) is arranged between adjacent two cleaning strips (2), and the scraping strip (8) is located in the first annular groove.

6. A reactor gas line purging apparatus as claimed in claim 1, wherein: The plurality of guide rods (4) are distributed in a circumferential direction with the circumferential direction of the magnetic ring (3) as the center.

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