Tail gas treatment device for roasting molecular sieve

Abstract

The tail gas treatment device comprises a supporting frame, a sedimentation assembly is fixedly connected to the lower portion of the right side of the supporting frame, a quenching assembly is fixedly connected to the upper portion of the right side of the supporting frame, and a liquid level mechanism is fixedly connected to the lower portion of the right side of the outer arc face of the quenching assembly. The left side of the supporting frame is fixedly connected with an absorption assembly. According to the tail gas treatment device for roasting the molecular sieve, the quenching assembly and the absorption assembly are arranged, so that the temperature of tail gas can be further reduced, the physical property of gas is optimized, and the collision and condensation effects between dust particles and micro-drops and between the dust particles can be remarkably enhanced through the low gas temperature; the dust particles are more easily collided with the sprayed clear liquid micro-drops to be condensed into dust-containing liquid drops with larger particle sizes, so that the dust-containing liquid drops are more effectively captured, and the tail gas purification effect is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology, and in particular to an exhaust gas treatment device for molecular sieve calcination. Background Technology

[0002] Shape-selective molecular sieves are white solid powders with a maximum particle diameter of 60 μm, a minimum particle diameter of 2 μm, and an average particle diameter of 5–8 μm. They improve the selectivity of catalysts and enhance the activity of catalysts with different molecules, playing a vital role in the deep processing of crude oil heavy fractions.

[0003] In the production of molecular sieves, calcination is a crucial step. This process effectively removes organic template agents introduced during molecular sieve synthesis, further refining the crystal structure and significantly enhancing its adsorption and catalytic performance. However, calcination generates high-temperature exhaust gases containing pollutants such as dust particles, acidic gases, and volatile organic compounds. If these exhaust gases are emitted directly without effective treatment, they will not only cause serious atmospheric pollution but also lead to resource waste, posing a potential threat to ecological balance and human health in the long run.

[0004] Currently, conventional technologies for treating molecular sieve roasting exhaust gases mainly include cyclone separation, baghouse dust collection, and spray washing. Cyclone separation primarily utilizes centrifugal force to achieve gas-solid separation, but its removal efficiency for fine particles is poor, making it difficult to meet increasingly stringent environmental protection requirements. While baghouse dust collection has high removal efficiency for fine dust, the bags are prone to clogging when treating high-temperature, high-humidity exhaust gases, resulting in high maintenance costs and fire hazards. This leads to unsatisfactory exhaust gas purification effects and also generates large amounts of difficult-to-treat wastewater, causing secondary pollution.

[0005] Furthermore, existing exhaust gas treatment devices often lack effective mechanisms for resource recovery and recycling. Wastewater generated during the treatment process is usually discharged directly, wasting water resources and increasing wastewater treatment costs. The residual heat in the exhaust gas is also not utilized effectively, resulting in energy waste.

[0006] Therefore, a tail gas treatment device for molecular sieve calcination is needed. Utility Model Content

[0007] The main objective of this invention is to provide a tail gas treatment device for molecular sieve calcination, which can effectively solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A tail gas treatment device for molecular sieve calcination includes a support frame, a settling component fixedly connected to the lower right side of the support frame, a quenching component fixedly connected to the upper right side of the support frame, a liquid level mechanism fixedly connected to the lower right side of the outer arc surface of the quenching component, and an absorption component fixedly connected to the left side of the support frame.

[0010] Preferably, the absorption assembly includes an absorption tower and a circulation pump. The absorption tower is fixedly connected to the left side inside the support frame. An inlet pipe is fixedly connected to the upper side of the outer arc surface of the absorption tower. Several nozzles are fixedly connected to the upper side of the inner arc surface of the absorption tower in a ring array. A bent pipe is fixedly connected to the right side of the middle part of the outer arc surface of the absorption tower. A circulation pump is fixedly connected to the right side of the lower part of the absorption tower.

[0011] Preferably, the input end of the circulating pump penetrates the outer arc surface of the absorption tower and is connected to its inner cavity, and the output end of the absorption tower is fixedly connected to a bent pipe.

[0012] Preferably, the quenching assembly includes a tank body, which is fixedly connected to the upper right side of the support frame. A quenching tower is fixedly connected to the upper end of the tank body. An L-shaped nozzle is fixedly connected to the left side of the middle of the inner arc surface of the tank body. One end of the bend, away from the circulating pump, is fixedly connected to the left end of the L-shaped nozzle. A gas guide pipe is fixedly connected to the side wall of the absorption tower. The end of the gas guide pipe away from the absorption tower passes through the outer arc surface of the tank body and communicates with its inner cavity.

[0013] Preferably, the liquid level mechanism includes a fixed block, which is fixedly connected to the upper right side of the inner arc surface of the tank. A bent pipe is fixedly connected to the right end of the fixed block. Several support blocks are fixedly connected at intervals to the upper left end of the fixed block. A sealing plate is rotatably connected to the inner surface of the several support blocks. A through hole is opened in the middle of the fixed block. An air bladder is fixedly connected to the left end of the sealing plate.

[0014] Preferably, the sedimentation assembly includes a sedimentation tank and a clear liquid pump. The sedimentation tank is fixedly connected to the lower right side of the support frame. A clear liquid tank is fixedly connected to the upper outer surface of the sedimentation tank. The clear liquid pump is fixedly connected to the front left side of the sedimentation tank. Several support rollers are fixedly connected in a ring shape to the upper part of the inner cavity of the sedimentation tank. A guide box is fixedly connected to one end of the several support rollers that are close to each other. A turbid liquid pump is fixedly connected to the lower front end of the sedimentation tank.

[0015] Preferably, the input end of the clear liquid pump is fixedly connected to the lower front part of the clear liquid tank, and the output end of the clear liquid pump is fixedly connected to a third bend. The end of the third bend away from the clear liquid pump is fixedly connected to the lower part of the inlet pipe and communicates with the inner cavity of the inlet pipe. The end of the second bend away from the fixed block passes through the upper end of the clear liquid tank and communicates with the inner cavity of the guide box.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. During use, the present invention can further reduce the exhaust gas temperature by setting up a rapid cooling component and an absorption component, optimize the physical properties of the gas, and make the lower gas temperature significantly enhance the collision and agglomeration effect between dust particles and droplets, making it easier for dust particles to collide with the sprayed clean liquid droplets and agglomerate into larger dust-laden droplets, thereby being more effectively captured and greatly improving the purification effect of exhaust gas.

[0018] 2. During use, the present invention can separate the sprayed liquid into clear liquid and turbid liquid through the set sedimentation component, so that the separated clear liquid can be reused in the spraying system, avoiding the need to frequently replenish fresh water resources for exhaust gas purification and significantly reducing water resource procurement costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the absorption component of this utility model;

[0021] Figure 3 This is a schematic cross-sectional view of the rapid cooling component of this utility model;

[0022] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a schematic cross-sectional view of the settling component of this utility model;

[0024] Figure 6 This is a schematic diagram of the overall structure of this utility model from another perspective.

[0025] In the diagram: 1. Support frame; 2. Settling assembly; 21. Settling tank; 22. Clear liquid tank; 23. Support roller; 24. Flow guide box; 25. Clear liquid pump; 26. Bend 3; 27. Turbid liquid pump; 3. Quenching assembly; 31. Quenching tower; 32. Tank body; 33. L-shaped nozzle; 4. Absorption assembly; 41. Absorption tower; 42. Inlet pipe; 43. Nozzle; 44. Circulation pump; 45. Air guide pipe; 46. Bend 1; 5. Liquid level mechanism; 51. Fixing block; 52. Bend 2; 53. Support block; 54. Sealing plate; 55. Airbag. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] Example 1, as Figures 1 to 6As shown, a tail gas treatment device for molecular sieve calcination includes a support frame 1. A settling component 2 is fixedly connected to the lower right side of the support frame 1, a quenching component 3 is fixedly connected to the upper right side of the support frame 1, a liquid level mechanism 5 is fixedly connected to the lower right side of the outer arc surface of the quenching component 3, and an absorption component 4 is fixedly connected to the left side of the support frame 1.

[0028] In the above process, firstly, an external water pipe is connected to the internal structure of the absorption component 4, allowing liquid to be introduced into the absorption component 4. This causes the internal structure of the absorption component 4 to spray dust-suppressing liquid. Then, by activating the internal structure of the absorption component 4, the sprayed liquid is drawn out and sent into the quenching component 3 for further spraying. Next, by connecting an external exhaust gas pipe to the upper end of the quenching component 3, the exhaust gas enters the quenching component 3 from the upper end. The gas and liquid phases flow and collide along the same axis, cooling the exhaust gas. Simultaneously, the gas rapidly comes into turbulent contact with the surface of the fresh liquid, and most particles are captured and enter the interior of the quenching component 3. At the same time, the initially purified exhaust gas enters the inner cavity of the absorption component 4 through its internal structure. The internal structure of the absorption component 4 then sprays the exhaust gas entering it, causing it to condense into larger dust-laden droplets, which are then captured. This further purifies the dust in the exhaust gas, allowing it to meet emission standards before being discharged from the top of the absorption component 4.

[0029] Then, as the amount of liquid sprayed inside the quenching component 3 gradually increases, the liquid gradually rises and touches the internal structure of the liquid level mechanism 5, causing the liquid accumulated inside the quenching component 3 to fall into the settling component 2 for settling. Then, when the liquid is separated into clear liquid and turbid liquid inside the settling component 2, the clear liquid is sent into the internal structure of the absorption component 4 for secondary spraying, thereby achieving the purpose of recycling.

[0030] Example 1: In order to achieve the purpose of dust reduction in exhaust gas, refer to... Figure 2 In this scheme, the absorption assembly 4 includes an absorption tower 41 and a circulation pump 44. The absorption tower 41 is fixedly connected to the left side inside the support frame 1. An inlet pipe 42 is fixedly connected to the upper side of the outer arc surface of the absorption tower 41. Several nozzles 43 are fixedly connected to the upper side of the inner arc surface of the absorption tower 41 in a ring array. A bend pipe 46 is fixedly connected to the right side of the middle part of the outer arc surface of the absorption tower 41. A circulation pump 44 is fixedly connected to the lower right side of the absorption tower 41.

[0031] Furthermore, the input end of the circulating pump 44 penetrates the outer arc surface of the absorption tower 41 and is connected to its inner cavity, and the output end of the absorption tower 41 is fixedly connected to a bend 46.

[0032] In the above process, the liquid inlet pipe 42 is connected to the external liquid inlet pipe, and then several nozzles 43 spray out the liquid, which gradually accumulates at the bottom of the absorption tower 41. Then, the circulation pump 44 is started to pump out the dust-suppressing liquid at the bottom of the absorption tower 41 and enters the internal structure of the quenching component 3 through the bend pipe 46 to spray out the gas for initial cooling and dust suppression.

[0033] The specific installation method, circuit connection method, and control method of the circulating pump 44 used above are all conventional designs, and will not be described in detail in this utility model.

[0034] Specifically, in order to cool and reduce dust in the incoming exhaust gas, refer to Figure 3 In this solution, the quenching component 3 includes a tank 32, which is fixedly connected to the upper right side of the support frame 1. A quenching tower 31 is fixedly connected to the upper end of the tank 32. An L-shaped nozzle 33 is fixedly connected to the left side of the middle of the inner arc surface of the tank 32. The end of the bend 46 away from the circulating pump 44 is fixedly connected to the left end of the L-shaped nozzle 33. The end of the gas guide pipe 45 away from the absorption tower 41 passes through the outer arc surface of the tank 32 and communicates with its inner cavity.

[0035] In the above process, the liquid output through the bend pipe 46 is sprayed out from the tank 32, and then the external exhaust gas pipe is connected to the upper end of the quench tower 31, so that the exhaust gas enters the inner cavity of the quench tower 31. At the same time, the liquid sprayed upward through the L-shaped nozzle 33 collides with the downward flowing exhaust gas, thereby achieving the purpose of cooling the exhaust gas and initially reducing dust. Then, the initially purified exhaust gas flows downward and enters the inner cavity of the absorption tower 41 through the gas guide pipe 45, where it is sprayed by several nozzles 43 to achieve the purpose of secondary dust capture and reduction of the exhaust gas.

[0036] Specifically, in order to allow the liquid gradually accumulating inside the tank 32 to enter the internal structure of the settling assembly 2 for separation, refer to Figure 4 In this scheme, the liquid level mechanism 5 includes a fixing block 51, which is fixedly connected to the upper right side of the inner arc surface of the tank 32. A bent pipe 52 is fixedly connected to the right end of the fixing block 51. Several support blocks 53 are fixedly connected at intervals to the upper left end of the fixing block 51. A sealing plate 54 is rotatably connected to the inner surface of the several support blocks 53. A through hole is opened in the middle of the fixing block 51. An air bladder 55 is fixedly connected to the left end of the sealing plate 54.

[0037] As described above, the liquid in the inner cavity of the tank 32 gradually increases and rises. When the liquid comes into contact with the lower end of the airbag 55, the airbag 55 remains floating on the rising liquid due to its hollow interior. The airbag 55 then moves upward, causing the sealing plate 54 to flip. This allows the liquid to enter the inner cavity of the second bend 52 through the through hole in the middle of the fixing block 51, and then flows into the internal structure of the settling assembly 2 through the second bend 52.

[0038] Specifically, in order to achieve the purpose of separating the sprayed liquid, refer to Figure 5 In this scheme, the sedimentation assembly 2 includes a sedimentation tank 21 and a clear liquid pump 25. The sedimentation tank 21 is fixedly connected to the lower right side of the support frame 1. A clear liquid tank 22 is fixedly connected to the upper outer surface of the sedimentation tank 21. The clear liquid pump 25 is fixedly connected to the front left side of the sedimentation tank 21. Several support rollers 23 are fixedly connected in a ring shape to the upper part of the inner cavity of the sedimentation tank 21. A guide box 24 is fixedly connected to one end of the several support rollers 23 that are close to each other. A turbid liquid pump 27 is fixedly connected to the lower front end of the sedimentation tank 21.

[0039] Furthermore, the input end of the clear liquid pump 25 is fixedly connected to the lower front part of the clear liquid tank 22, and the output end of the clear liquid pump 25 is fixedly connected to a bend 3 26. The end of the bend 3 26 away from the clear liquid pump 25 is fixedly connected to the lower part of the inlet pipe 42 and communicates with the inner cavity of the inlet pipe 42. The end of the bend 2 52 away from the fixing block 51 passes through the upper end of the clear liquid tank 22 and communicates with the inner cavity of the guide box 24.

[0040] In the above process, the liquid discharged through the second bend 52 enters the bottom of the settling tank 21 from the inner cavity of the guide box 24, causing the liquid to gradually rise in the inner cavity of the settling tank 21. During the rising process, the liquid impurities inside are deposited on the bottom wall of the settling tank 21 due to gravity, causing the upper liquid to gradually become clear liquid. Then, the clear liquid passes over the upper edge of the settling tank 21 and enters the inner cavity of the clear liquid tank 22. Then, the clear liquid is pumped out by starting the clear liquid pump 25 and sent into the inner cavity of the inlet pipe 42 through the third bend 26 for circulation spraying. Finally, the turbid liquid deposited at the bottom of the settling tank 21 is discharged outward by the turbid liquid pump 27.

[0041] It should be noted that the specific installation method, circuit connection method and control method of the clear liquid pump 25 and turbid liquid pump 27 used in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tail gas treatment device for molecular sieve calcination, comprising a support frame (1), characterized in that: A settling component (2) is fixedly connected to the lower right side of the support frame (1), a quenching component (3) is fixedly connected to the upper right side of the support frame (1), a liquid level mechanism (5) is fixedly connected to the lower right side of the outer arc surface of the quenching component (3), and an absorption component (4) is fixedly connected to the left side of the support frame (1).

2. The tail gas treatment device for molecular sieve calcination according to claim 1, characterized in that: The absorption assembly (4) includes an absorption tower (41) and a circulation pump (44). The absorption tower (41) is fixedly connected to the left side of the support frame (1). An inlet pipe (42) is fixedly connected to the upper side of the outer arc surface of the absorption tower (41). Several nozzles (43) are fixedly connected to the upper side of the inner arc surface of the absorption tower (41) in a ring array. A bend pipe (46) is fixedly connected to the right side of the middle part of the outer arc surface of the absorption tower (41). A circulation pump (44) is fixedly connected to the right side of the lower part of the absorption tower (41).

3. The tail gas treatment device for molecular sieve calcination according to claim 2, characterized in that: The input end of the circulating pump (44) passes through the outer arc surface of the absorption tower (41) and is connected to its inner cavity. The output end of the absorption tower (41) is fixedly connected to a bend pipe (46).

4. The tail gas treatment device for molecular sieve calcination according to claim 2, characterized in that: The quenching assembly (3) includes a tank (32), which is fixedly connected to the upper right side of the support frame (1). A quenching tower (31) is fixedly connected to the upper end of the tank (32). An L-shaped nozzle (33) is fixedly connected to the left side of the middle of the inner arc surface of the tank (32). The end of the bend (46) away from the circulating pump (44) is fixedly connected to the left end of the L-shaped nozzle (33). A gas guide pipe (45) is fixedly connected to the side wall of the absorption tower (41). The end of the gas guide pipe (45) away from the absorption tower (41) passes through the outer arc surface of the tank (32) and communicates with its inner cavity.

5. The tail gas treatment device for molecular sieve calcination according to claim 4, characterized in that: The liquid level mechanism (5) includes a fixed block (51), which is fixedly connected to the upper right side of the inner arc surface of the tank (32). A bent pipe (52) is fixedly connected to the right end of the fixed block (51). Several support blocks (53) are fixedly connected at intervals to the upper left end of the fixed block (51). A sealing plate (54) is rotatably connected to the inner surface of several support blocks (53). A through hole is opened in the middle of the fixed block (51). An air bladder (55) is fixedly connected to the left end of the sealing plate (54).

6. The tail gas treatment device for molecular sieve calcination according to claim 5, characterized in that: The settling assembly (2) includes a settling tank (21) and a clear liquid pump (25). The settling tank (21) is fixedly connected to the lower right side of the support frame (1). A clear liquid tank (22) is fixedly connected to the upper outer surface of the settling tank (21). The clear liquid pump (25) is fixedly connected to the front left side of the settling tank (21). Several support rollers (23) are fixedly connected in a ring shape to the upper part of the inner cavity of the settling tank (21). A guide box (24) is fixedly connected to one end of the several support rollers (23) that are close to each other. A turbid liquid pump (27) is fixedly connected to the lower front end of the settling tank (21).

7. The tail gas treatment device for molecular sieve calcination according to claim 6, characterized in that: The input end of the clear liquid pump (25) is fixedly connected to the front of the lower end of the clear liquid tank (22). The output end of the clear liquid pump (25) is fixedly connected to a bend three (26). The end of the bend three (26) away from the clear liquid pump (25) is fixedly connected to the lower part of the inlet pipe (42) and communicates with the inner cavity of the inlet pipe (42). The end of the bend two (52) away from the fixed block (51) passes through the upper end of the clear liquid tank (22) and communicates with the inner cavity of the guide box (24).

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