Acid-resistant alloy dry absorption tower for sulfuric acid production

Abstract

The utility model relates to the field of sulfuric acid production equipment, and discloses an acid-resistant alloy dry absorption tower for sulfuric acid production, which comprises a tower body, an acid distributor arranged at the upper part in the tower body and connected with a spraying device, an air inlet and an acid outlet arranged on the side surface of the lower part of the tower body 1, and a wall flow prevention ring fixed on the inner side surface of the tower body, the wall flow prevention rings are uniformly distributed along the inner walls of the two sides of the tower body, and a supporting assembly is arranged in the tower body below the acid distributor. According to the acid-resistant alloy dry absorption tower provided by the utility model, due to the adoption of acid-resistant materials such as high-silicon stainless steel and the design of the anti-wall-flow check ring, corrosion is effectively prevented, the absorption efficiency of sulfur trioxide is improved, and meanwhile, the installation and maintenance processes are simplified.

Description

Technical Field

[0001] The utility model relates to the field of sulfuric acid production equipment, in particular to an acid-resistant alloy dry absorption tower for sulfuric acid production. Background Art

[0002] The drying and absorption tower in a sulfuric acid production plant is primarily used for air drying and SO₃ absorption, making it an essential chemical equipment in the sulfuric acid production process. Currently, drying and absorption towers used to produce concentrated sulfuric acid typically utilize a carbon steel shell lined with acid-resistant ceramic tiles to prevent corrosion of the tower body by the concentrated sulfuric acid. This brick lining structure places very strict requirements on the lining material and construction. In particular, the mortar joints between the acid-resistant bricks can easily leak concentrated sulfuric acid between the lining and the steel shell due to substandard construction quality, causing corrosion and damage to the tower body. With the continuous development of society and technology, the stability of chemical production systems is receiving increasing attention in the industry. Therefore, it is of great significance to develop a drying and absorption tower with a simple structure, stable operation, and easy manufacturing, installation, and maintenance. Utility Model Content

[0003] In view of the above-mentioned technical deficiencies, the technical problem to be solved by the present invention is to provide an acid-resistant alloy dry absorption tower for sulfuric acid production, aiming to solve the problems exposed by the above-mentioned brick-lined dry absorption tower, such as complex structure, long manufacturing cycle, aging and cracking of brick joints, which seriously affect production stability.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: The utility model provides an acid-resistant alloy dry absorption tower for sulfuric acid production, comprising: a tower body, an acid separator is provided in the upper part of the tower body, the acid separator is connected to a spray device, an air inlet and an acid outlet are provided on the lower side of the tower body, an anti-wall flow ring is fixed on the inner side of the tower body, the anti-wall flow ring is evenly distributed along the inner walls on both sides of the tower body, and a support assembly is provided in the tower body below the acid separator.

[0005] Furthermore, the wall-preventing flow ring is longitudinally arranged along the inner wall of the tower body.

[0006] Furthermore, the wall flow prevention ring includes a serrated inner ring.

[0007] Further, the support assembly includes a filler support grid and a filler support beam;

[0008] The filler support beam is welded to the inner wall of the tower body, and the filler support grid is located on the filler support beam.

[0009] Furthermore, a fiber demister is provided in the upper part of the tower body.

[0010] Furthermore, it also includes: an acid-resistant ceramic filler layer is provided between the acid distribution device and the support component.

[0011] Furthermore, one or more wall flow prevention rings may be provided at different heights of the acid-resistant ceramic filler layer.

[0012] Furthermore, an acid outlet filter is provided above the acid outlet.

[0013] Furthermore, the tower body, the acid separation device, the wall-proof flow ring, the support assembly, the fiber mist eliminator and the acid outlet filter are all made of acid-resistant alloy materials.

[0014] The beneficial effects of the present utility model are:

[0015] 1. The use of acid-resistant alloy to manufacture the part in contact with concentrated sulfuric acid avoids the corrosion problem caused by construction defects in the traditional carbon steel lined acid-resistant tile structure, simplifies the manufacturing and installation process, and significantly improves the stability and service life of the dry absorption tower.

[0016] 2. The introduction of anti-wall flow retaining rings reduces liquid flow on the inner wall of the tower, increases the gas-liquid contact area, and improves the sulfur trioxide absorption efficiency. At the same time, the design without lining makes inspection, cleaning and maintenance more convenient, reducing downtime and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the explosion structure of an acid-resistant alloy dry absorption tower for sulfuric acid production provided in an embodiment of the utility model.

[0019] Figure 2 Schematic diagram of the wall-proof flow circle.

[0020] Explanation of the accompanying symbols: 1. Tower body; 2. Acid distribution device; 3. Spraying device; 4. Air inlet; 5. Acid outlet; 6. Anti-wall flow ring; 7. Support assembly; 701. Packing support grid; 702. Packing support beam; 8. Fiber demister; 9. Acid-resistant ceramic packing layer; 10. Acid outlet filter. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example

[0023] like Figure 1 and Figure 2 As shown, this embodiment provides an acid-resistant alloy dry absorption tower for sulfuric acid production, comprising: a tower body 1, an acid separator 2 is provided on the upper part of the tower body 1, the acid separator is connected to a spray device 3, an air inlet 4 and an acid outlet 5 are provided on the lower side of the tower body 1, an anti-wall flow ring 6 is fixed on the inner side of the tower body 1, and the anti-wall flow ring 6 is evenly distributed along the inner walls on both sides of the tower body 1, and a support assembly 7 is provided in the tower body 1 below the acid separator.

[0024] Specifically, such as Figure 1 As shown, the support assembly 7 includes a packing support grid 701 and a packing support beam 702; the packing support beam 702 is welded to the inner wall of the tower body 1, and the packing support grid 701 is located on the packing support beam 702; a fiber demister 8 is also provided on the upper inner part of the tower body 1; an acid-resistant ceramic packing layer 9 is provided between the acid separation device 2 and the support assembly 7. The wall flow prevention ring can be set one or more at the height of the packing layer, the purpose is to reduce the generation of wall flow in the tower, increase the gas-liquid contact area in the tower, and improve the absorption efficiency of the dry absorption tower; an acid outlet filter 10 is provided above the acid outlet 5; preferably, the tower body 1, the acid separation device 2, the wall flow prevention ring 6, the support assembly 7, the fiber demister 8 and the acid outlet filter 10 are all made of acid-resistant alloy materials, which can achieve the effect of resisting concentrated sulfuric acid without the need for an inner lining structure; the wall flow prevention ring 6 is arranged longitudinally along the inner wall of the tower body 1, such as Figure 2 As shown, the wall-preventing flow ring 6 includes a serrated inner ring.

[0025] During operation, after sulfuric acid enters the dry absorption tower, it first passes through an acid distribution device 2, where it is evenly sprayed onto the packing layer to ensure that the sulfuric acid can fully cover the packing surface. The anti-wall flow retaining ring helps reduce the generation of wall flow in the tower and increase the gas-liquid contact area. As the gas rises through the acid-resistant ceramic packing layer 9, the sulfur trioxide therein reacts with the sulfuric acid to produce a higher concentration of sulfuric acid. At the same time, some water is evaporated and carried away, further increasing the concentration of sulfuric acid. After sufficient gas-liquid contact, the purified gas carrying a small amount of acid mist continues to move upward to the fiber demister 8, where the residual acid mist can be effectively removed, ensuring the quality of the subsequent exhaust gas. Finally, the formed high-concentration sulfuric acid flows out through the acid outlet at the bottom of the tower and is collected after the impurities are removed by the filter; the purified gas is discharged from the top of the tower, meeting the environmental emission standards.

[0026] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An acid-resistant alloy dry absorption tower for sulfuric acid production, characterized in that: include: The tower body is provided with an acid distributor at the upper part, the acid distributor is connected to the spray device, an air inlet and an acid outlet are provided on the lower side of the tower body, an anti-wall flow ring is fixed on the inner side of the tower body, and the anti-wall flow ring is evenly distributed along the inner walls on both sides of the tower body, and a support assembly is provided in the tower body below the acid distributor.

2. The acid-resistant alloy dry absorption tower for sulfuric acid production according to claim 1, characterized in that: The wall-preventing flow ring is arranged longitudinally along the inner wall of the tower body.

3. The acid-resistant alloy dry absorption tower for sulfuric acid production according to claim 1, characterized in that: The wall flow prevention ring includes a serrated inner ring.

4. The acid-resistant alloy dry absorption tower for sulfuric acid production according to claim 1, characterized in that: The support assembly includes a filler support grid and a filler support beam; The filler support beam is welded to the inner wall of the tower body, and the filler support grid is located on the filler support beam.

5. The acid-resistant alloy dry absorption tower for sulfuric acid production according to claim 1, characterized in that: A fiber demister is also provided in the upper part of the tower body.

6. The acid-resistant alloy dry absorption tower for sulfuric acid production according to claim 1, characterized in that: Also includes: An acid-resistant ceramic filler layer is provided between the acid distribution device and the supporting assembly.

7. The acid-resistant alloy dry absorption tower for sulfuric acid production according to any one of claims 1 or 6, characterized in that: One or more wall flow prevention rings can be provided at different heights of the acid-resistant ceramic filler layer.

8. The acid-resistant alloy dry absorption tower for sulfuric acid production according to claim 1, characterized in that: An acid outlet filter is provided above the acid outlet.

9. The acid-resistant alloy dry absorption tower for sulfuric acid production according to claim 1, characterized in that: The tower body, acid separation device, wall-proof flow ring, support components, fiber demister and acid outlet filter are all made of acid-resistant alloy materials.

Images