Corrosion-resistant acid absorption tower
By introducing a mixing chamber of mixed exhaust gas and air into the acid absorption tower and using an oxidant to repair the passivation film, the problem of the passivation film being easily damaged is solved, and the long life of the equipment and safe production are achieved.
Patent Information
- Application Number
- CN202422701672.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-11-06
AI Technical Summary
During the use of existing acid absorption towers, the passivation film is easily destroyed by chemical materials, resulting in corrosion damage, affecting the equipment life and safe production.
A mixing chamber is introduced into the acid absorption tower, and the mixed exhaust gas and air enter the tower body. The oxygen in the air is used to repair the passivation film in the presence of an oxidant to enhance the corrosion resistance.
It significantly improves the corrosion resistance of the acid absorption tower, extends the service life of the equipment, and ensures the safe production of chemical plants.
Smart Images
Figure CN223464647U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to absorption tower equipment technical field especially relates to a kind of corrosion-resistant acid absorption tower. BACKGROUND
[0002] Acid absorption tower, also known as acid gas purification tower, acid mist absorption tower, waste gas purification tower and glass steel acid mist purification tower, is a kind of efficient waste gas treatment equipment. Acid absorption tower can treat various harmful gases, including hydrogen chloride gas, hydrogen fluoride gas, sulfuric acid mist, nitric acid mist, chromic acid mist, cyanogen hydrogen acid gas, hydrogen sulfide, ammonia, alkali steam and other water-soluble gases.
[0003] The inside of acid absorption tower is stainless steel material, and needs to be pickled and passivated before being put into use. The purpose of pickling and passivation treatment of stainless steel pipeline is to remove the welding oxide layer and form a metal protective film on the inner wall surface, so as to ensure the internal cleanliness of the pipeline, resist corrosion and prolong the service life. The corrosion resistance of stainless steel is mainly due to the coverage of a thin (about 1-15nm) dense passivation film on the surface. The passivation film can isolate the corrosion medium and is the basic barrier for stainless steel protection. However, stainless steel passivation has dynamic characteristics and cannot completely prevent corrosion. Instead, it forms a barrier layer to greatly reduce the anodic reaction rate. Usually, in the presence of reducing agents (such as chloride ions), the passivation film will be damaged.
[0004] Therefore, although acid absorption tower has been pickled and passivated before being put into use, and a passivation film has been formed, the chemical materials contacted during use can damage the passivation film of the equipment, leading to corrosion and damage of the equipment and affecting safe production. UTILITY MODEL CONTENTS
[0005] To solve the above technical problems, the utility model provides a kind of corrosion-resistant acid absorption tower, and the passivation film in its inside can be continuously repaired, has better corrosion resistance, long service life of equipment, and guarantees the safe production of chemical plant.
[0006] The utility model realizes the following technical scheme:
[0007] The corrosion-resistant acid absorption tower, comprising an absorption tower body, a gas inlet is arranged at the lower part of the absorption tower body, a gas outlet is arranged at the top of the absorption tower body, an absorption liquid inlet is further arranged at the top of the absorption tower body, and an absorption liquid outlet is arranged at the bottom of the absorption tower body.
[0008] Preferably, the inside of the absorption tower body is made of stainless steel material, and the inside of the absorption tower body is provided with staggered baffles.
[0009] Preferably, the air inlet is connected to a mixing chamber via a pipe, and the mixing chamber is provided with an exhaust gas inlet and an air inlet. When the exhaust gas to be treated is flammable and explosive gas, air and flammable and explosive gas need to be mixed in the mixing chamber to reduce the concentration of the flammable and explosive gas to below the lower explosion limit.
[0010] Preferably, the absorption liquid inlet and the absorption liquid outlet are connected outside the absorption tower body through a circulation pipeline.
[0011] Preferably, the circulation pipeline is provided with a circulation pump, a tower bottom discharge port and an absorption liquid feed port in sequence from the absorption liquid outlet to the absorption liquid inlet.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] The utility model sets a mixing chamber at the air inlet, and the mixing chamber is provided with a waste gas inlet and an air inlet. By introducing air into the acid absorption tower, an oxidant is provided for the acid absorption tower. In the presence of the oxidant, the passivation film in the acid absorption tower can be protected and repaired, thereby significantly improving the corrosion resistance of the acid absorption tower, extending the service life of the equipment, and ensuring the safe production of the chemical plant. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the structure of a corrosion-resistant acid absorption tower;
[0015] Among them: 1. Absorption tower body; 2. Air inlet; 3. Air outlet; 4. Absorption liquid inlet; 5. Absorption liquid outlet; 6. Mixing chamber; 7. Waste gas inlet; 8. Air inlet; 9. Circulation pipeline; 10. Circulation pump; 11. Tower bottom outlet; 12. Absorption liquid inlet. DETAILED DESCRIPTION
[0016] The preferred solution of the present invention will be further described below with reference to the accompanying drawings.
[0017] Example 1
[0018] like Figure 1 As shown, the corrosion-resistant acid absorption tower described in the utility model includes an absorption tower body 1, an air inlet 2 is provided at the lower part of the absorption tower body 1, an air outlet 3 is provided at the top of the absorption tower body 1, an absorption liquid inlet 4 is also provided at the top of the absorption tower body 1, and an absorption liquid outlet 5 is provided at the bottom of the absorption tower body 1.
[0019] The interior of the absorption tower body 1 is made of stainless steel, and is provided with staggered baffles.
[0020] The air inlet 2 is connected to the mixing chamber 6 through a pipeline. The mixing chamber 6 is provided with an exhaust gas inlet 7 and an air inlet 8.
[0021] The absorption liquid inlet 4 and the absorption liquid outlet 5 are connected by a circulating pipeline 9 outside the absorption tower body 1.
[0022] The circulating pipeline 9 is sequentially provided with a circulating pump 10, a tower kettle discharge port 11 and an absorption liquid feeding port 12 from the absorption liquid outlet 5 to the absorption liquid inlet 4.
[0023] The working process of the utility model is as follows:
[0024] The waste gas to be treated enters the mixing bin 6 through the waste gas inlet 7, and the air enters the mixing bin 6 through the air inlet 8, and the waste gas to be treated and the air are mixed in the mixing bin 6, and then enter the bottom of the absorption tower body 1 through the gas inlet 2, at this time, the absorption liquid enters the circulating pipeline 9 through the absorption liquid feeding port 12, is pumped to the absorption liquid inlet 4 at the top of the absorption tower body 1 by the circulating pump 10, enters the absorption tower body 1, and reacts with the waste gas to be treated in the tower, in the reaction process, the oxygen in the air protects and repairs the passivation film in the absorption tower body 1, and resists the corrosion of chemical substances. The gas reaching the top of the tower is discharged through the gas outlet 3, and the absorption liquid reaching the bottom of the tower is pumped to the circulating pipeline 9 by the circulating pump 10 to participate in the circulation, and the waste liquid is finally discharged through the tower kettle discharge port 11.
[0025] When the waste gas to be treated is flammable and explosive gas, the air and the flammable and explosive gas need to be mixed in the mixing bin 6, so that the concentration of the flammable and explosive gas is lower than the lower limit of explosion.
Claims
1. A corrosion-resistant acid absorption tower, characterized in that: The application relates to an absorption tower, which comprises an absorption tower body (1), a gas inlet (2) arranged at the lower part of the absorption tower body (1), a gas outlet (3) arranged at the top of the absorption tower body (1), an absorption liquid inlet (4) arranged at the top of the absorption tower body (1), an absorption liquid outlet (5) arranged at the bottom of the absorption tower body (1), and a mixing bin (6) connected with the gas inlet (2) through a pipeline.
2. The corrosion resistant sour absorber column of claim 1, wherein: The absorption tower body (1) is made of stainless steel.
3. The corrosion resistant sour absorber column of claim 1, wherein: The absorption tower body (1) is internally provided with staggered baffles.
4. The corrosion resistant sour absorber column of claim 1, wherein: The mixing bin (6) is provided with a waste gas inlet (7) and an air inlet (8).
5. The corrosion resistant sour absorber column of claim 1, wherein: The absorption liquid inlet (4) and the absorption liquid outlet (5) are connected through a circulating pipeline (9) outside the absorption tower body (1).
6. The corrosion resistant sour absorber column of claim 5, wherein: A circulating pump (10), a tower kettle discharge port (11) and an absorption liquid feeding port (12) are sequentially arranged on the circulating pipeline (9) from the absorption liquid outlet (5) to the absorption liquid inlet (4).