Air preheater for phthalic anhydride production

Abstract

The utility model belongs to the technical field of phthalic anhydride production equipment, and particularly relates to an air preheater for phthalic anhydride production, which comprises a preheater main body, a connecting piece is mounted at the end part of the preheater main body; the side wall of the connecting piece is fixedly connected with two groups of shells; a spring rod is fixedly connected to the inner wall of the shell, and the output end of the spring rod penetrates through the middle of the connecting piece. The inner wall of the connecting piece is slidably connected with a frame. A filter screen is fixedly connected to the middle of the frame; a first guide block is fixedly connected to the side wall of the frame, and the middle of the first guide block is gradually inclined downwards; according to the invention, through cooperation with an elastic spring rod, subsequent taking-out of the frame and replacement of the filter screen can be facilitated, the problem that trouble occurs in the subsequent taking-out process of the frame due to the fact that the edge of the frame is flush with the connecting piece is reduced, and under the action of the gravity of a balancing weight, the stability of the frame during working can be improved; and the problem that the filter screen shakes when the preheater main body works is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of phthalic anhydride production equipment, and specifically relates to an air preheater for phthalic anhydride production. Background Technique

[0002] The chemical name of phthalic anhydride is phthalic anhydride, which is an organic compound and an important organic chemical raw material, playing an important role in multiple industrial fields. For example, it can be used as a plasticizer for high molecular materials such as plastics and rubbers, or for synthesizing polymers such as polyamides and polyesters.

[0003] During the production process of phthalic anhydride, in order to improve the reaction efficiency, the heat exchange method between flue gas and air is usually adopted by means of an air preheater, transferring the waste heat in the flue gas to the air and heating the air to the required temperature, thereby reducing the energy consumption and production cost of the phthalic anhydride device.

[0004] Through long-term observation, although the existing filter screen can filter fine particles in the flue gas, when the filter screen is replaced after long-term use, since the edge of the filter screen is flush with the height of the air preheater, it makes the problem of troublesome filter screen replacement; therefore, an air preheater for phthalic anhydride production is proposed for the above problems. Summary of the Utility Model

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background technique, the utility model proposes an air preheater for phthalic anhydride production.

[0006] The technical solution adopted by the utility model to solve its technical problems is: an air preheater for phthalic anhydride production described in the utility model includes a preheater main body; a connecting piece is installed at the end of the preheater main body; two groups of shells are fixedly connected to the side wall of the connecting piece; a spring rod is fixedly connected to the inner wall of the shell, and the output end of the spring rod penetrates through the middle of the connecting piece; a frame is slidably connected to the inner wall of the connecting piece; a filter screen is fixedly connected to the middle of the frame; a first guide block is fixedly connected to the side wall of the frame, and the middle of the first guide block is gradually inclined downward; a support plate is fixedly connected to the top of the preheater main body; a sliding rod is slidably connected to the middle of the support plate; a counterweight block is fixedly connected to the bottom of the sliding rod, and the counterweight block is arranged on the top of the first guide block.

[0007] Preferably, a plurality of groups of tooth grooves are formed in the middle of the sliding rod; a support rod is fixedly connected to the top of the support plate; a tooth block is rotatably connected to the middle of the support rod, and the tooth block and the tooth grooves are meshed with each other; a tooth rod is slidably connected to the middle of the support plate, and the tooth block and the tooth rod are meshed with each other; a limiting member is fixedly connected to the top of the tooth rod.

[0008] Preferably, a second guide block is fixedly connected to the top of the limiting member; the middle part of the second guide block is inclined; an elastic member is fixedly connected to the middle part of the second guide block; and an impact ball is fixedly connected to the end of the elastic member.

[0009] Preferably, a support plate is fixedly connected to the output end of the spring rod; a storage groove matching the shape of the support plate is formed in the inner wall of the connecting member.

[0010] Preferably, a support frame is fixedly connected to the bottom of the counterweight; a rotating wheel is rotatably connected to the middle of the support frame.

[0011] Preferably, a gasket is fixedly connected to the middle of the support plate.

[0012] Preferably, a protective member is provided at the end of the impact ball.

[0013] Advantages of the present utility model:

[0014] 1. The present utility model provides an air preheater for phthalic anhydride production. By cooperating with the elastic spring rod, it is convenient to remove the frame and replace the filter screen subsequently, reducing the problem that the edge of the frame is flush with the connecting member, which causes trouble during the subsequent removal of the frame. Under the action of the gravity of the counterweight, the stability of the frame during operation can be improved, and the problem of the filter screen shaking during the operation of the preheater main body can be reduced.

[0015] 2. The present utility model provides an air preheater for phthalic anhydride production. By cooperating with the provided rack, when it is necessary to separate the entire counterweight from the first guide block, the problem that it is difficult for the staff to control the slide bar due to the high position of the slide bar can be reduced, and the problem that it is troublesome for the staff to pull the slide bar upward with one hand and take out the frame with the other hand during the removal of the frame can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0017] Figure 1 is the three-dimensional structure schematic diagram of the present utility model;

[0018] Figure 2 is the filter screen structure schematic diagram of the present utility model;

[0019] Figure 3 is Figure 2 the enlarged view of part A of

[0020] Figure 4 is the spring rod structure schematic diagram of the present utility model.

[0021] Legend Explanation:

[0022] 1. Preheater main body; 11. Connecting piece; 12. Housing; 13. Spring rod; 14. Frame; 15. Filter screen; 16. First guide block; 17. Support plate; 18. Slide bar; 19. Counterweight block; 2. Tooth groove; 21. Support rod; 22. Tooth block; 23. Tooth rod; 24. Limiting piece; 3. Second guide block; 31. Elastic piece; 32. Impact ball; 4. Support plate; 41. Receiving groove; 5. Support frame; 51. Runner; 6. Gasket; 7. Protective piece. Detailed Implementation Manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0024] The following gives specific embodiments.

[0025] Such as Figures 1-4As shown in the figure, an air preheater for phthalic anhydride production includes a preheater main body 1; a connecting piece 11 is installed at the end of the preheater main body 1; two groups of shells 12 are fixedly connected to the side wall of the connecting piece 11; a spring rod 13 is fixedly connected to the inner wall of the shell 12, and the output end of the spring rod 13 penetrates through the middle of the connecting piece 11; a frame 14 is slidably connected to the inner wall of the connecting piece 11; a filter screen 15 is fixedly connected to the middle of the frame 14; a first guide block 16 is fixedly connected to the side wall of the frame 14, and the middle of the first guide block 16 is gradually inclined downward; a support plate 17 is fixedly connected to the top of the preheater main body 1; a sliding rod 18 is slidably connected to the middle of the support plate 17; a counterweight 19 is fixedly connected to the bottom of the sliding rod 18, and the counterweight 19 is arranged on the top of the first guide block 16; during operation, the staff needs to install the tail end of the boiler together with the connecting piece 11, so that the hot flue gas discharged from the boiler will be filtered by the filter screen 15 after passing through the connecting piece 11. At the same time, the preheater main body 1 can collect and utilize the heat in the flue gas. By arranging the filter screen 15 as a whole to be slidable, when the filter screen 15 is in use, under the action of gravity, the counterweight 19 can squeeze the edge of the frame 14, and when the frame 14 slides, it will synchronously squeeze the output end positions of the two groups of spring rods 13, and cause the output end of the spring rod 13 to retract. When the whole frame 14 needs to be taken out, the staff can pull up the sliding rod 18, so that the sliding rod 18 drives the counterweight 19 to move. Until the counterweight 19 is separated from the first guide block 16, at this time, the frame 14 will lose the support force of the counterweight 19, and the output end of the spring rod 13 will rebound and push out the whole frame 14. Then, the filter screen 15 can be replaced. This step, combined with the elastic spring rod 13, can facilitate the subsequent removal of the frame 14 and the replacement of the filter screen 15, reducing the problem that the edge of the frame 14 is flush with the connecting piece 11, which makes it troublesome to take out the frame 14 subsequently. Under the action of the gravity of the counterweight 19, the stability of the frame 14 during operation can be improved, and the problem of the filter screen 15 shaking during the operation of the preheater main body 1 can be reduced.

[0026] As Figures 2-3As shown, multiple sets of tooth grooves 2 are formed in the middle of the sliding rod 18; a support rod 21 is fixedly connected to the top of the support plate 17; a tooth block 22 is rotatably connected to the middle of the support rod 21, and the tooth block 22 and the tooth groove 2 are meshed with each other; a tooth rod 23 is slidably connected to the middle of the support plate 17, and the tooth block 22 and the tooth rod 23 are meshed with each other; a limiting member 24 is fixedly connected to the top of the tooth rod 23; during operation, multiple sets of tooth grooves 2 are formed in the middle of the sliding rod 18. When the staff needs to separate the counterweight 19 from the first guide block 16, the edge of the tooth rod 23 can be pulled downward. Since the tooth rod 23, the tooth block 22, and the tooth groove 2 are meshed with each other, when the tooth rod 23 moves downward, the tooth block 22 will rotate in the middle of the support rod 21, and the entire sliding rod 18 will drive the counterweight 19 to move upward until the limiting member 24 is close to the top of the support plate 17. This step, combined with the arranged tooth rod 23, can reduce the problem that it is difficult for the staff to control the sliding rod 18 when the counterweight 19 needs to be separated from the first guide block 16 as a whole because the sliding rod 18 is at a relatively high height, and can reduce the trouble that occurs when the staff needs to pull the sliding rod 18 upward with one hand and take out the frame 14 with the other hand when taking out the frame 14.

[0027] As Figure 3 shown, a second guide block 3 is fixedly connected to the top of the limiting member 24; the middle of the second guide block 3 is inclined; an elastic member 31 is fixedly connected to the middle of the second guide block 3; an impact ball 32 is fixedly connected to the end of the elastic member 31; during operation, since the second guide block 3 is arranged on the top of the limiting member 24, when the limiting member 24 approaches and impacts the top of the support plate 17, due to inertia, the middle of the elastic member 31 will bend, and the impact ball 32 will impact the middle of the sliding rod 18. The vibration force generated by the impact can clean some impurities on the inner wall of the tooth groove 2. This step, combined with the impact force of the impact ball 32, can improve the cleanliness of the inner wall of the tooth groove 2, reduce the problem of large wear or jamming when the sliding rod 18 is exposed to the outside for a long time and meshes with the tooth block 22 after a large amount of impurities accumulate on its surface, and at the same time, the elastic member 31 can increase the impact frequency of the impact ball 32.

[0028] As Figure 1 and 4As shown, a support plate 4 is fixedly connected to the output end of the spring rod 13; a storage groove 41 matching the shape of the support plate 4 is provided on the inner wall of the connecting member 11; during operation, by providing the support plate 4 at the output end of the spring rod 13, when the frame 14 slides or is squeezed by the spring rod 13, the support plate 4 will first contact the side wall of the frame 14 for work. At the same time, when the installation of the frame 14 is completed, the support plate 4 will be stored on the inner wall of the storage groove 41. This step, combined with the provided support plate 4, can increase the contact area for pushing the entire frame 14 and reduce the problem of slippage. Moreover, the storage groove 41 can store the support plate 4 and improve the sealing performance at the port between the frame 14 and the connecting member 11.

[0029] As Figure 2 shown, a support frame 5 is fixedly connected to the bottom of the counterweight 19; a runner 51 is rotatably connected to the middle of the support frame 5; during operation, by providing the support frame 5 at the bottom of the counterweight 19, when the counterweight 19 falls, the runner 51 will slide in the middle of the first guide block 16. This step, combined with the provided runner 51, can reduce the wear on the middle of the first guide block 16 and at the same time reduce the movement resistance of the entire counterweight 19 during the falling process.

[0030] As Figure 4 shown, a gasket 6 is fixedly connected to the middle of the support plate 4; during operation, by providing the gasket 6 in the middle of the support plate 4, when the support plate 4 approaches the end of the frame 14, the gasket 6 will first contact it for work. This step, combined with the gasket 6 made of a soft material, can further protect the edge of the frame 14 and reduce the scratches generated during the operation of the frame 14.

[0031] As Figure 3 shown, a protective member 7 is provided at the end of the impact ball 32; during operation, by providing the protective member 7 in the middle of the impact ball 32, the impact ball 32 can protect the protective member 7. At the same time, when the protective member 7 needs to be replaced, it can be torn off. This step, combined with the provided protective member 7, can increase the overall service life of the impact ball 32 and at the same time facilitate its replacement work.

[0032] Working principle: By installing the boiler tail end together with the connecting piece 11, the hot flue gas discharged from the boiler will be filtered by the filter screen 15 after passing through the connecting piece 11. At the same time, the main body 1 of the preheater can collect and utilize the heat in the flue gas. Since the filter screen 15 is slidably arranged as a whole, when the filter screen 15 is in use, under the action of gravity, the counterweight 19 can squeeze the edge of the frame 14. When the frame 14 slides, it will synchronously squeeze the output ends of the two spring rods 13, causing the output ends of the spring rods 13 to retract in position. When it is necessary to take out the whole frame 14, the staff can pull up the sliding rod 18, so that the sliding rod 18 drives the counterweight 19 to move. Until the counterweight 19 is separated from the first guide block 16, at this time, the frame 14 will lose the supporting force of the counterweight 19, and the output ends of the spring rods 13 will rebound and push out the whole frame 14. Then, the filter screen 15 can be replaced. By providing a plurality of tooth grooves 2 in the middle of the sliding rod 18, when the staff needs to separate the counterweight 19 from the first guide block 16, they can pull down the edge of the tooth rod 23. Since the tooth rod 23, the tooth block 22 and the tooth grooves 2 are meshed, when the tooth rod 23 moves downward, the tooth block 22 will rotate in the middle of the support rod 21, and the whole sliding rod 18 will drive the counterweight 19 to move upward until the limiting member 24 is close to the top of the support plate 17. By providing a second guide block 3 on the top of the limiting member 24, when the limiting member 24 approaches and impacts the top of the support plate 17, under the action of inertia, the middle of the elastic member 31 will bend, and the impact ball 32 will impact the middle of the sliding rod 18. The vibration force generated by the impact can clean some impurities on the inner wall of the tooth groove 2. By providing a support plate 4 at the output end of the spring rod 13, when the frame 14 slides or is squeezed by the spring rod 13, the support plate 4 will first contact the side wall of the frame 14. At the same time, when the position of the frame 14 is installed, the support plate 4 will be received in the inner wall of the receiving groove 41. By providing a support frame 5 at the bottom of the counterweight 19, when the counterweight 19 falls, the runner 51 will slide in the middle of the first guide block 16. Together with the gasket 6 provided in the middle of the support plate 4, the gasket 6 will first contact it when the support plate 4 approaches the end of the frame 14. By providing a protective member 7 in the middle of the impact ball 32, the impact ball 32 can protect the protective member 7. At the same time, when it is necessary to replace the protective member 7, it can be torn off.

[0033] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. An air preheater for phthalic anhydride production, comprising a preheater main body (1); a connecting member (11) is installed at the end of the preheater main body (1); characterized in that: Two sets of shells (12) are fixedly connected to the side wall of the connecting piece (11); a spring rod (13) is fixedly connected to the inner wall of the shell (12), and the output end of the spring rod (13) penetrates through the middle of the connecting piece (11); a frame (14) is slidably connected to the inner wall of the connecting piece (11); a filter screen (15) is fixedly connected to the middle of the frame (14); a first guide block (16) is fixedly connected to the side wall of the frame (14), and the middle of the first guide block (16) is gradually inclined downward; a support plate (17) is fixedly connected to the top of the preheater body (1); a sliding rod (18) is slidably connected to the middle of the support plate (17); a counterweight block (19) is fixedly connected to the bottom of the sliding rod (18), and the counterweight block (19) is arranged on the top of the first guide block (16).

2. The air preheater for phthalic anhydride production according to claim 1, wherein: Multiple groups of tooth grooves (2) are formed in the middle of the sliding rod (18); a support rod (21) is fixedly connected to the top of the support plate (17); a tooth block (22) is rotatably connected to the middle of the support rod (21), and the tooth block (22) is meshed with the tooth grooves (2); a tooth rod (23) is slidably connected to the middle of the support plate (17), and the tooth block (22) is meshed with the tooth rod (23); a limiting member (24) is fixedly connected to the top of the tooth rod (23).

3. The air preheater for phthalic anhydride production according to claim 2, characterized in that: A second guide block (3) is fixedly connected to the top of the limiting member (24); the middle of the second guide block (3) is inclined; an elastic member (31) is fixedly connected to the middle of the second guide block (3); an impact ball (32) is fixedly connected to the end of the elastic member (31).

4. The air preheater for phthalic anhydride production according to claim 1, characterized in that: A support plate (4) is fixedly connected to the output end of the spring rod (13); a storage groove (41) matching the shape of the support plate (4) is formed in the inner wall of the connecting piece (11).

5. The air preheater for phthalic anhydride production according to claim 1, characterized in that: A support frame (5) is fixedly connected to the bottom of the counterweight block (19); a runner (51) is rotatably connected to the middle of the support frame (5).

6. The air preheater for phthalic anhydride production according to claim 4, wherein: A gasket (6) is fixedly connected to the middle of the support plate (4).

7. The air preheater for phthalic anhydride production according to claim 3, wherein: A protective member (7) is arranged at the end of the impact ball (32).

Images