Titanium dioxide high-temperature bag filter air inlet method and system

Abstract

The invention relates to the technical field of titanium dioxide production, in particular to a titanium dioxide high-temperature bag filter gas inlet method and system, and the method comprises the following steps: S1, high-temperature dust-containing gas enters a filter main body at a girdling angle in titanium dioxide production; s2, the high-temperature dust-containing gas entering the filter main body is guided by a rotational flow plate, so that the high-temperature dust-containing gas generates high-speed rotational flow in the filter main body, and pre-separation of large-particle dust is realized; s3, the high-temperature dust-containing gas in high-speed rotational flow is dispersed and dredged through a flow equalizing device, so that the high-temperature dust-containing gas is uniformly distributed; s4, filtering the uniformly distributed high-temperature dust-containing gas through uniformly distributed filtering cloth bags; according to the invention, the arrangement mode of the pattern plate holes of the pattern plate is optimized, and the filtering area is increased, the filtering wind speed is reduced, the filtering efficiency is improved and the service life of a filter bag is prolonged on the premise of not changing the equipment volume.

Description

Technical Field

[0001] This invention relates to the field of titanium dioxide production technology, and more specifically, to a method and system for air intake in a high-temperature bag filter for titanium dioxide. Background Technology

[0002] The production of titanium dioxide generates a large amount of high-temperature, dust-laden gas, typically maintained at 120℃-250℃. The titanium dioxide dust in this gas is highly viscous and requires gas-solid separation using a bag filter to meet environmental emission requirements and achieve titanium dioxide material recovery. However, traditional bag filters generally suffer from low filtration efficiency, short filter bag life, and severe material accumulation on the inner walls of the filter housing when handling this type of high-temperature, viscous dust. These issues directly restrict the continuity of titanium dioxide production and reduce economic efficiency. Existing high-temperature bag filters mostly adopt a direct-inlet design, where dust-laden gas directly enters the filtration chamber, resulting in three major drawbacks: First, the tube sheet uses a conventional rectangular matrix arrangement, limiting the number of filter bags that can be installed and resulting in insufficient filtration area; second, the inlet air path lacks a cyclone separation structure, allowing large dust particles to directly impact the surface of the filter bags, accelerating their wear; and third, the internal chamber lacks a temperature distribution design, leading to localized high-temperature areas that can accelerate filter bag aging, while sticky dust can easily adhere to the chamber walls, forming stubborn deposits that further affect filtration efficiency and equipment operational stability. In view of the shortcomings of the prior art, the present invention proposes an air intake method and system for a high-temperature bag filter for titanium dioxide, aiming to solve the technical problems of insufficient filtration area, severe impact of large dust particles, uneven temperature distribution, and material accumulation on the wall in the prior art. Summary of the Invention

[0003] The purpose of this invention is to provide an air intake method and system for a high-temperature bag filter for titanium dioxide, so as to solve the problems of insufficient filtration area, severe impact of large dust particles, uneven temperature distribution, and material accumulation on the wall in the prior art.

[0004] To achieve the above objectives, the present invention provides a method for air intake in a high-temperature bag filter for titanium dioxide, the specific steps of which are as follows: S1: During titanium dioxide production, high-temperature dust-laden gas enters the filter body at a circumferential angle; S2: After entering the filter body, the high-temperature dust-laden gas is guided by the cyclone plate, so that the high-temperature dust-laden gas generates a high-speed cyclone in the filter body; S3: The high-speed swirling high-temperature dust-laden gas is dispersed and guided by the flow equalization device, so that the high-temperature dust-laden gas is evenly distributed. S4: The uniformly distributed high-temperature dust-laden gas is then filtered through uniformly distributed filter bags. S5: The filtered gas is discharged through the exhaust port.

[0005] A high-temperature bag filter air intake system for titanium dioxide, comprising a system for implementing the above-mentioned high-temperature bag filter air intake method for titanium dioxide, including, The filter body includes a bag chamber, a clean air chamber is fixedly installed at the top of the bag chamber, and an ash hopper is fixedly installed at the bottom of the bag chamber. The air intake pipe is fixedly installed at the bottom of the circumferential side wall of the bag filter chamber and is connected to the bag filter chamber. The exhaust port is located at the top of the circumferential side wall of the clean air chamber; The material discharge port is located at the bottom of the ash hopper; The baghouse dust collector includes a tube sheet that is horizontally fixed at the top of the baghouse chamber, and filter bags that are fixedly installed at the bottom of the tube sheet.

[0006] As a further improvement to this technical solution, both the bag chamber and the clean air chamber are cylindrical, and the top of the clean air chamber is sealed.

[0007] As a further improvement to this technical solution, the air intake pipe is connected to the bag chamber in a direction tangential to the outer wall of the bag chamber.

[0008] As a further improvement to this technical solution, a swirl outer plate is horizontally fixedly installed in the inner cavity of the bag filter chamber, and the swirl outer plate is located above the air inlet pipe. A swirl inner plate is horizontally fixedly installed at the connection between the bag filter chamber and the ash hopper. Multiple sets of flow equalization holes are opened on both the swirl outer plate and the swirl inner plate, and the multiple sets of flow equalization holes are arranged in a ring array.

[0009] As a further improvement to this technical solution, a spiral guide plate is fixedly installed in the inner cavity of the bag chamber, and the guide plate is located between the outer swirl plate and the inner swirl plate, with a spiral angle of 45°-65°.

[0010] As a further improvement to this technical solution, multiple sets of perforations are provided on the perforated plate, the filter bag is fixedly installed in the perforation, and the filter bag passes through the vortex outer plate through the flow equalization hole, and the filter bag is located above the vortex inner plate.

[0011] As a further improvement to this technical solution, an inlet door is installed on the outer circumference of the clean air chamber, and an ash hopper inlet is provided at the bottom of the conical surface of the ash hopper. Both the inlet door and the ash hopper inlet are equipped with sealing doors. As a further improvement to this technical solution, vibrators are symmetrically and fixedly installed on the left and right sides of the filter bag chamber, and multiple sets of vibrating rods are fixedly installed on the vibrating ends of the vibrators, with the vibrating rods extending into the filter bag and the multiple sets of vibrating rods being perpendicular to the central axis of the filter bag.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This application optimizes the arrangement of the holes in the tube sheet, increasing the filtration area, reducing the filtration velocity, improving filtration efficiency, and extending the service life of the filter bags without changing the size of the equipment.

[0013] 2. This application designs a swirl-type air intake structure to achieve pre-separation of large dust particles, reduce the impact of dust on the filter bag, and at the same time make the temperature inside the chamber uniformly distributed, avoiding damage to the filter bag caused by local high temperature.

[0014] 3. This application is equipped with a vibrator, and the vibrating rod on the vibrator is in contact with the filter bag, so that the attached sticky dust can be removed by vibration. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure assembly of the present invention; Figure 2 This is a schematic diagram of the internal structure of the bag compartment in this invention.

[0016] In the diagram: 1. Baghouse; 2. Clean air chamber; 3. Ash hopper; 4. Air inlet pipe; 5. Exhaust port; 6. Manhole; 7. Material discharge port; 8. Ash hopper inlet; 9. Tube plate; 901. Tube plate hole; 10. Filter bag; 11. Swirl outer plate; 12. Swirl inner plate; 13. Vibrator. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0018] Example 1: This example provides a method for air intake in a high-temperature bag filter for titanium dioxide, such as... Figure 1 and 2 As shown, this method can solve the problems of insufficient filtration area, severe impact from large dust particles, uneven temperature distribution, and material accumulation on the wall surface in existing technologies. The specific steps are as follows: S1: High-temperature dust-laden gas in titanium dioxide production enters the filter body 1 at a circumferential angle; S2: After entering the filter body 1, the high-temperature dust-laden gas is guided by the cyclone plate, which causes the high-temperature dust-laden gas to generate a high-speed cyclone in the filter body 1, thereby achieving the pre-separation of large dust particles. S3: The high-speed swirling high-temperature dust-laden gas is dispersed and guided by the flow equalization device, so that the high-temperature dust-laden gas is evenly distributed. S4: The uniformly distributed high-temperature dust-laden gas is then filtered through the uniformly distributed filter bags 10. S5: The filtered gas is discharged through the exhaust port.

[0019] Example 2: As Figure 1 and 2As shown, this embodiment is based on the above implementation, and the technical problem solved by this embodiment compared with the above embodiment 1 is: how to make the temperature inside the box uniformly distributed. The difference from the above embodiment is: a titanium dioxide high temperature bag filter air intake system, a system for realizing the titanium dioxide high temperature bag filter air intake method, includes a filter body, the filter body includes a bag chamber 1, a clean air chamber 2 is fixedly installed on the top of the bag chamber 1, and an ash hopper 3 is fixedly installed on the bottom of the bag chamber 1. Both the bag chamber 1 and the clean air chamber 2 are cylindrical, and the top of the clean air chamber 2 is sealed. An inlet door 6 is installed on the outer circumference of the clean air chamber 2. An ash hopper inlet 8 is provided at the bottom of the conical surface of the ash hopper 3. Both the inlet door 6 and the ash hopper inlet 8 are provided with sealing doors. Maintenance personnel enter the ash hopper 3 and the clean air chamber 2 through the ash hopper inlet 8 and the inlet door 6 to perform maintenance and repair. An air inlet pipe 4 is fixedly installed at the bottom of the circumferential side wall of the bag chamber 1 and is connected to the bag chamber 1. The air inlet pipe 4 is connected to the bag chamber 1 in a direction tangential to the outer wall of the bag chamber 1. A swirl outer plate 11 is horizontally fixedly installed in the inner cavity of the bag chamber 1 and is located above the air inlet pipe 4. A swirl inner plate 12 is horizontally fixedly installed at the connection between the bag chamber 1 and the ash hopper 3. Multiple sets of flow equalization holes are opened on both the swirl outer plate 11 and the swirl inner plate 12 and are arranged in a ring array. A spiral guide plate is fixedly installed in the inner cavity of the bag chamber 1 and is located between the swirl outer plate 11 and the swirl inner plate 12. The spiral angle of the guide plate is 45°-65°. Exhaust port 5 is located at the top of the circumferential side wall of the clean air chamber 2; Discharge port 7 is located at the bottom of ash hopper 3; The bag filter dust collector includes a tube sheet 9 horizontally fixedly installed at the top of the inner cavity of the bag chamber 1. A filter bag 10 is fixedly installed at the bottom of the tube sheet 9. The tube sheet 9 has multiple sets of tube sheet holes 901. The filter bag 10 is fixedly installed in the tube sheet holes 901, and the filter bag 10 passes through the vortex outer plate 11 through the flow equalization hole. The filter bag 10 is located above the vortex inner plate 12. Vibrators 13 are symmetrically fixedly installed on the left and right sides of the filter bag chamber 1, and multiple sets of vibrating rods are fixedly installed on the vibrating end of the vibrator 13. The vibrating rods extend into the filter bag 10, and the multiple sets of vibrating rods are perpendicular to the central axis of the filter bag 10. The vibrating rods are in contact with the top of the filter bag 10.

[0020] Based on the above features, the working principle of the present invention is as follows: in the production of titanium dioxide, high-temperature dust-laden gas is transported to the bag filter chamber 1 through the air inlet pipe 4. Since the air inlet pipe 4 is connected to the bag filter chamber 1 in a direction tangential to the outer wall of the bag filter chamber 1, the high-temperature dust-laden gas enters the filter body at a circumferential angle.

[0021] After the high-temperature dust-laden gas enters the bag filter chamber 1, it is guided by a spiral guide plate. The dust-laden gas forms a vortex after passing through the guide plate. Centrifugal force is used to throw large particles of titanium dioxide dust onto the wall of the chamber and fall into the ash hopper along the wall, thus achieving the pre-separation of large particles of dust.

[0022] The high-speed swirling high-temperature dust-laden gas is further dispersed through the flow equalization holes on the outer swirl plate 11, so that the high-temperature dust-laden gas is more evenly distributed in the bag filter chamber 1, and the temperature deviation in the bag filter chamber 1 is controlled within ±5℃.

[0023] The traditional rectangular matrix arrangement of the perforated plate holes 901 is changed to a concentric circle staggered arrangement. Without changing the overall volume of the perforated plate (and equipment), the number of filter bags installed is increased, thereby increasing the filtration area by 20%-30%, and thus controlling the filtration velocity at 0.6m / min-0.8m / min (the traditional solution is 1.2m / min-1.5m / min).

[0024] The inner wall of the bag chamber 1 is mirror-finished and is equipped with a vibrator 13, which is a low-frequency vibrator. Several vibrating rods (vibration frequency of 50Hz-80Hz) are added to the wall surface. The vibration causes the attached sticky dust to fall off and fall into the ash hopper for collection.

Claims

1. A method for air intake in a high-temperature bag filter for titanium dioxide, characterized in that: The specific steps are as follows: S1: During titanium dioxide production, high-temperature dust-laden gas enters the filter body at a circumferential angle; S2: After entering the filter body, the high-temperature dust-laden gas is guided by the cyclone plate, which causes the high-temperature dust-laden gas to generate a high-speed cyclone in the filter body, realizing the pre-separation of large dust particles. S3: The high-speed swirling high-temperature dust-laden gas is dispersed and guided by the flow equalization device, so that the high-temperature dust-laden gas is evenly distributed. S4: The uniformly distributed high-temperature dust-laden gas is then filtered through uniformly distributed filter bags. S5: The filtered gas is discharged through the exhaust port.

2. A high-temperature bag filter air intake system for titanium dioxide, used to implement the high-temperature bag filter air intake method for titanium dioxide as described in claim 1, characterized in that, include, The filter body includes a bag chamber, a clean air chamber is fixedly installed at the top of the bag chamber, and an ash hopper is fixedly installed at the bottom of the bag chamber. The air intake pipe is fixedly installed at the bottom of the circumferential side wall of the bag filter chamber and is connected to the bag filter chamber. The exhaust port is located at the top of the circumferential side wall of the clean air chamber; The material discharge port is located at the bottom of the ash hopper; The baghouse dust collector includes a tube sheet that is horizontally fixed at the top of the baghouse chamber, and filter bags that are fixedly installed at the bottom of the tube sheet.

3. The air inlet system for a high-temperature bag filter for titanium dioxide according to claim 2, characterized in that: Both the bag chamber and the clean air chamber are cylindrical, and the top of the clean air chamber is sealed.

4. The air inlet system for a high-temperature bag filter for titanium dioxide according to claim 3, characterized in that: The air intake pipe is connected to the baghouse in a direction tangential to the outer wall of the baghouse.

5. The air inlet system for a high-temperature bag filter for titanium dioxide according to claim 4, characterized in that: A swirl outer plate is horizontally fixedly installed inside the bag filter chamber, and the swirl outer plate is located above the air inlet pipe. A swirl inner plate is horizontally fixedly installed at the connection between the bag filter chamber and the ash hopper. Multiple sets of flow equalization holes are opened on both the swirl outer plate and the swirl inner plate, and the multiple sets of flow equalization holes are arranged in a ring array.

6. The air inlet system for a high-temperature bag filter for titanium dioxide according to claim 5, characterized in that: The inner cavity of the bag chamber is fixedly equipped with a spiral guide plate, which is located between the outer swirl plate and the inner swirl plate. The spiral angle of the guide plate is 45°-65°.

7. The air inlet system for a high-temperature bag filter for titanium dioxide according to claim 6, characterized in that: Multiple sets of perforations are provided on the perforated plate. The filter bag is fixedly installed in the perforation and passes through the vortex outer plate through the flow equalization hole. The filter bag is located above the vortex inner plate.

8. The high-temperature bag filter air inlet system for titanium dioxide according to claim 7, characterized in that: The outer circumferential wall of the clean air chamber is equipped with an inlet door, and the bottom of the conical surface of the ash hopper is provided with an ash hopper inlet. Both the inlet door and the ash hopper inlet are equipped with sealing doors.

9. The high-temperature bag filter air inlet system for titanium dioxide according to claim 8, characterized in that: Vibrators are symmetrically fixedly installed on the left and right sides of the filter bag chamber, and multiple sets of vibrating rods are fixedly installed on the vibrating end of the vibrator. The vibrating rods extend into the filter bag, and the multiple sets of vibrating rods are perpendicular to the central axis of the filter bag. The vibrating rods are in contact with the top of the filter bag.

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