Foam catching device for high-purity sulfuric acid production
By designing a mist-collecting device consisting of a tower body, a gas-liquid exchange section, and a multi-layer titanium wire mist-collecting mesh in a high-purity sulfuric acid production unit, the problem of low mist-collecting efficiency was solved, achieving efficient collection of acid mist, reducing production costs, and extending equipment life.
Patent Information
- Application Number
- CN202520405731.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-07
AI Technical Summary
In the current high-purity sulfuric acid production process, the demister has low demister efficiency, resulting in a large amount of acid foam remaining at the blower outlet, which increases production costs, reduces measurement accuracy, and affects the normal operation of subsequent processes.
Design a foam trap for high-purity sulfuric acid production, including a tower body, a gas-liquid exchange section, a foam trapping section, and a sealing section. The gas-liquid exchange section guides the fluid to the foam trapping section, and a multi-layer titanium wire foam trapping mesh is used to collect acid foam, thereby improving foam trapping efficiency.
It significantly improves foam capture efficiency, reduces acid foam residue, lowers production costs, ensures measurement accuracy, and extends equipment life.
Smart Images
Figure CN223930762U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of high-purity sulfuric acid production equipment, specifically relating to a foam trap for high-purity sulfuric acid production. Background Technology
[0002] In existing technologies, during the production of high-purity sulfuric acid, a demister is a device used to separate liquid droplets or acid mist entrained in gas. Common demisters include wire mesh demisters, baffle plate demisters, spherical demisters, and centrifugal demisters. They can be used to separate liquid droplets entrained in gas in the tower to ensure mass transfer efficiency, reduce the loss of valuable materials, and improve the operation of the compressor downstream of the tower. Wire mesh demisters are generally installed at the top of the tower, but they can also be installed between the trays. This not only ensures the mass transfer efficiency of the trays but also reduces the tray spacing. They can also be used for gas separation in air filters and as buffers for various instruments in the instrumentation industry, as well as electronic shields to prevent electromagnetic interference. They are now widely used in industrial production in the chemical, petroleum, sulfuric acid, pharmaceutical, light industry, metallurgy, machinery, and environmental protection fields.
[0003] In existing technologies, during the production of high-purity sulfuric acid, a demister is often installed on the dry absorption tower to capture excess acid foam carried out of the tower after the gas phase (sulfur trioxide, sulfur dioxide) and liquid phase (93% sulfuric acid, 98% sulfuric acid) absorb moisture and sulfur trioxide through counter-current contact. In subsequent stages, the impeller of the conveying fan and the expansion and contraction tubes of the heat exchanger will be corroded and damaged by the acid foam in the gas phase, leading to system shutdown for maintenance and increased equipment costs. The existing demisters have low demister efficiency, and a large amount of acid foam still remains at the fan outlet in the subsequent stages of high-purity sulfuric acid production. This seriously reduces the accuracy of measuring the acid mist moisture at the fan outlet, reduces the effectiveness of the tail gas absorption tower in absorbing sulfuric acid mist, increases alkali consumption, and raises operating costs. Therefore, improvements are urgently needed. Utility Model Content
[0004] This application addresses the technical problem in the existing technology that, in the actual production process of high-purity sulfuric acid, a demister needs to be installed on the dry absorption tower to capture excess acid foam carried out of the tower after the gas phase (sulfur trioxide, sulfur dioxide) and liquid phase (93% sulfuric acid, 98% sulfuric acid) absorb moisture and sulfur trioxide through countercurrent contact. The existing demisters have low demister efficiency, and a large amount of acid foam remains at the blower outlet in subsequent stages, which significantly increases the production cost of high-purity sulfuric acid. This application proposes a demister device for the production of high-purity sulfuric acid.
[0005] This application adopts the following scheme: a mist eliminator for high-purity sulfuric acid production, comprising a tower body and a plurality of mist eliminators disposed on the tower body. Each mist eliminator includes a gas-liquid exchange section disposed on the tower body, a mist eliminator disposed on the gas-liquid exchange section, and a sealing section disposed on the mist eliminator. The gas-liquid exchange section is used to guide the fluid in the tower body to the mist eliminator, and the mist eliminator is used to collect acid mist entrained in the fluid.
[0006] In some possible embodiments, multiple mist traps are provided at intervals along the height of the tower.
[0007] In some possible embodiments, multiple mist traps are provided at intervals around the central axis of the tower body.
[0008] In some possible embodiments, the mist-catching section includes a housing disposed on the gas-liquid exchange section, a mist-catching chamber disposed on the housing, a mist-catching net assembly disposed on one end of the mist-catching chamber near the gas-liquid exchange section, a sealing section disposed on the mist-catching chamber, and the mist-catching net assembly being used to collect acid mist entrained in the fluid.
[0009] In some possible embodiments, the mist trap group includes a first mist trap and a second mist trap disposed from the inside to the outside of the mist trap chamber. The mesh size of the first mist trap is defined as A, and the mesh size of the second mist trap is defined as B. The relationship between A and B is: 1.2≤A / B≤2.
[0010] In some possible embodiments, the first and second foam traps are made of the same material, and the material of the first / second foam trap is selected from any one of pure nickel wire, pure titanium wire, brass wire, phosphor bronze wire, and iron wire.
[0011] In some possible embodiments, the first / second foam trap is made of pure titanium wire.
[0012] In some possible embodiments, the mist-catching unit further includes a fixing groove disposed in the mist-catching chamber, wherein the two ends of the first mist-catching net / the second mist-catching net can be matched and extended into the fixing groove to be fixed in the mist-catching chamber.
[0013] In some possible embodiments, the sealing portion includes a sealing cap that covers the mist collection chamber and a sealing gasket disposed between the sealing cap and the mist collection chamber.
[0014] In some possible embodiments, the sealing cover is provided with a handle for a user to hold.
[0015] Compared with the prior art, this application has the following beneficial effects:
[0016] This application provides a defoaming device for high-purity sulfuric acid production, which includes a tower body and multiple defoaming components disposed on the tower body. The defoaming components include a gas-liquid exchange section disposed on the tower body and a sealing section disposed on the defoaming section of the gas-liquid exchange section. The gas-liquid exchange section guides the fluid in the tower body to the defoaming section. The acid foam in the fluid will diffuse and sink on the defoaming section and then accumulate on the defoaming section, which significantly improves the defoaming efficiency of the defoaming section and avoids the situation where a large amount of acid foam remains at the blower outlet in the subsequent process, thereby reducing the production cost of high-purity sulfuric acid. It has the advantages of simple structure, significant defoaming effect, simple operation, and easy promotion and implementation. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of a foam trap for the production of high-purity sulfuric acid according to this application;
[0018] Figure 2 This is a front view of a foam trap for the production of high-purity sulfuric acid according to this application;
[0019] Figure 3 This is a top view of a foam trap for the production of high-purity sulfuric acid according to this application;
[0020] Figure 4 This application Figure 3 Sectional view at point AA;
[0021] Figure 5 This application Figure 4 A magnified view of a section at point A in the middle;
[0022] Figure 6 This is a schematic diagram of the exploded structure of a foam trap for the production of high-purity sulfuric acid according to this application. Detailed Implementation
[0023] Combination Figure 1-6 The content shown further illustrates the technical solution provided in this application: a foam trap for high-purity sulfuric acid production, comprising a tower body 1 and a plurality of foam trap components 2 disposed on the tower body 1. Each foam trap component 2 includes a gas-liquid exchange section 3 disposed on the tower body 1, a foam trap section 4 disposed on the gas-liquid exchange section 3, and a sealing section 5 disposed on the foam trap section 4. The gas-liquid exchange section 3 is used to guide the fluid in the tower body 1 to the foam trap section 4, and the foam trap section 4 is used to collect acid foam entrained in the fluid.
[0024] This application provides a defoaming device for high-purity sulfuric acid production, which includes a tower body and multiple defoaming components disposed on the tower body. The defoaming components include a gas-liquid exchange section disposed on the tower body and a sealing section disposed on the defoaming section of the gas-liquid exchange section. The gas-liquid exchange section guides the fluid in the tower body to the defoaming section. The acid foam in the fluid will diffuse and sink on the defoaming section and then accumulate on the defoaming section, which significantly improves the defoaming efficiency of the defoaming section and avoids the situation where a large amount of acid foam remains at the blower outlet in the subsequent process, thereby reducing the production cost of high-purity sulfuric acid. It has the advantages of simple structure, significant defoaming effect, simple operation, and easy promotion and implementation.
[0025] In this embodiment, multiple mist trapping components 2 are spaced apart along the height direction of the tower body 1.
[0026] In actual implementation, 2-5 mist traps are installed at intervals along the height of the tower.
[0027] For example, the mist traps are spaced 2, 3, or 4 units apart along the height of the tower.
[0028] In this embodiment, multiple mist trapping components 2 are spaced apart around the central axis of the tower body 1.
[0029] In actual implementation, 2-4 mist traps are arranged around the central axis of the tower body.
[0030] For example, the mist traps are spaced 2, 3, or 4 times around the central axis of the tower.
[0031] In this embodiment, the mist collection unit 4 includes a housing 40 disposed on the gas-liquid exchange unit 3, a mist collection chamber 41 disposed on the housing 40, a mist collection net assembly 42 disposed on one end of the mist collection chamber 41 near the gas-liquid exchange unit 3, and a sealing part 5 disposed on the mist collection chamber 41. The mist collection net assembly 42 is used to collect acid mist entrained in the fluid.
[0032] In actual implementation, the mist eliminator also includes a guide plate located at one end of the gas-liquid exchange section near the tower body. The guide plate and the gas-liquid exchange section are at an angle, and the guide plate is used to guide the acid liquid in the tower body to the mist eliminator.
[0033] In this embodiment, the mist trapping net group 42 includes a first mist trapping net 420 and a second mist trapping net 421 arranged from the inside to the outside in the mist trapping chamber 41. The mesh size of the first mist trapping net 420 is defined as A, and the mesh size of the second mist trapping net 421 is defined as B. A and B satisfy the following relationship: 1.2≤A / B≤2.
[0034] In this embodiment, the first foam trap 420 and the second foam trap 421 are made of the same material. The material of the first foam trap 420 / the second foam trap 421 is any one of pure nickel wire, pure titanium wire, brass wire, phosphor bronze wire, and iron wire.
[0035] In this embodiment, the first foam trap 420 and the second foam trap 421 are made of pure titanium wire.
[0036] In actual implementation, the use of pure titanium wire for the first foam trap 420 and the second foam trap 421 has the following advantages:
[0037] Firstly, titanium has excellent corrosion resistance and performs exceptionally well in highly corrosive media such as sulfuric acid. During the sulfuric acid production process, the gas may contain corrosive components such as sulfur dioxide and sulfur trioxide. Pure titanium wire can resist the erosion of these corrosive substances, extend the service life of the mist eliminator, and reduce the frequency of equipment maintenance and replacement.
[0038] Secondly, titanium has a high melting point, allowing it to maintain stable performance at high temperatures. In the sulfuric acid production process, high-temperature gas handling may be involved; pure titanium wire can withstand high-temperature environments, ensuring the normal operation of the mist eliminator under these conditions.
[0039] Third, titanium wire has high strength and hardness, enabling it to withstand the impact and pressure of passing gas without easily deforming or being damaged. This helps maintain the structural stability and filtration effect of the mist eliminator, ensuring its effective collection of mist droplets during long-term use.
[0040] Fourth, titanium is relatively chemically stable and does not readily react with other chemicals. This allows pure titanium wire to maintain its performance stability in sulfuric acid production environments, preventing the mist eliminator's performance from being affected by reactions with chemical components in the gas.
[0041] Fifth, titanium has a relatively low density, making mist eliminators made of pure titanium wire lighter and easier to install and maintain. At the same time, lightweight mist eliminators also reduce the load on the equipment's support structure, lowering the overall weight and cost of the equipment.
[0042] In this embodiment, the mist-catching part 4 also includes a fixing groove 6 disposed in the mist-catching chamber 41. The two ends of the first mist-catching net 420 / the second mist-catching net 421 can be matched and extended into the fixing groove 6 to be fixed in the mist-catching chamber 41.
[0043] In actual implementation, the fixing groove is provided with threaded holes along its height direction, and the first / second scum trap is provided with through holes at corresponding positions. The first / second scum trap can be fixed in the fixing groove by simultaneously matching threaded fasteners through the threaded holes and through holes.
[0044] In this embodiment, the sealing part 5 includes a sealing cover 50 that covers the mist collection chamber 41, and a sealing gasket disposed between the sealing cover 50 and the mist collection chamber 41.
[0045] In actual implementation, silicone is selected as the material for the sealing gasket.
[0046] In this embodiment, the sealing cover 50 is provided with a handheld part 7, which is used for the user to hold.
[0047] This application provides a defoaming device for high-purity sulfuric acid production, which includes a tower body and multiple defoaming components disposed on the tower body. The defoaming components include a gas-liquid exchange section disposed on the tower body and a sealing section disposed on the defoaming section of the gas-liquid exchange section. The gas-liquid exchange section guides the fluid in the tower body to the defoaming section. The acid foam in the fluid will diffuse and sink on the defoaming section and then accumulate on the defoaming section, which significantly improves the defoaming efficiency of the defoaming section and avoids the situation where a large amount of acid foam remains at the blower outlet in the subsequent process, thereby reducing the production cost of high-purity sulfuric acid. It has the advantages of simple structure, significant defoaming effect, simple operation, and easy promotion and implementation.
[0048] The above are merely embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A foam eliminator for high-purity sulfuric acid production, characterized in that, The system includes a tower body (1) and a plurality of mist-catching assemblies (2) disposed on the tower body (1). Each mist-catching assembly (2) includes a gas-liquid exchange section (3) disposed on the tower body (1), a mist-catching section (4) disposed on the gas-liquid exchange section (3), and a sealing section (5) disposed on the mist-catching section (4). The gas-liquid exchange section (3) is used to guide the fluid in the tower body (1) to the mist-catching section (4), and the mist-catching section (4) is used to collect acid mist entrained in the fluid.
2. The foam eliminator for high-purity sulfuric acid production according to claim 1, characterized in that, The mist trapping assembly (2) is provided in multiple units at intervals along the height direction of the tower body (1).
3. The foam eliminator for high-purity sulfuric acid production according to claim 1, characterized in that, The mist trap (2) is provided in multiple units at intervals around the central axis of the tower body (1).
4. The foam eliminator for high-purity sulfuric acid production according to claim 1, characterized in that, The mist-catching unit (4) includes a housing (40) disposed on the gas-liquid exchange unit (3), a mist-catching chamber (41) disposed on the housing (40), a mist-catching net assembly (42) disposed on one end of the mist-catching chamber (41) near the gas-liquid exchange unit (3), and a sealing part (5) disposed on the mist-catching chamber (41). The mist-catching net assembly (42) is used to collect acid mist entrained in the fluid.
5. The foam eliminator for high-purity sulfuric acid production according to claim 4, characterized in that, The mist trap group (42) includes a first mist trap (420) and a second mist trap (421) arranged from the inside to the outside in the mist trap chamber (41). The mesh size of the first mist trap (420) is defined as A, and the mesh size of the second mist trap (421) is defined as B. A and B satisfy the following relationship: 1.2≤A / B≤2.
6. The foam eliminator for high-purity sulfuric acid production according to claim 5, characterized in that, The first foam trap (420) and the second foam trap (421) are made of the same material. The first foam trap (420) and the second foam trap (421) are made of any one of pure nickel wire, pure titanium wire, brass wire, phosphor bronze wire, or iron wire.
7. A foam eliminator for high-purity sulfuric acid production according to claim 6, characterized in that, The first foam trap (420) and the second foam trap (421) are made of pure titanium wire.
8. A foam eliminator for high-purity sulfuric acid production according to claim 5, characterized in that, The mist-catching part (4) also includes a fixing groove (6) provided in the mist-catching chamber (41), and the two ends of the first mist-catching net (420) / the second mist-catching net (421) can be matched and extended into the fixing groove (6) to be fixed in the mist-catching chamber (41).
9. A foam eliminator for high-purity sulfuric acid production according to claim 4, characterized in that, The sealing part (5) includes a sealing cover (50) that covers the mist chamber (41) and a sealing gasket disposed between the sealing cover (50) and the mist chamber (41).
10. A foam eliminator for high-purity sulfuric acid production according to claim 9, characterized in that, The sealing cover (50) is provided with a hand-held part (7) for the user to hold.