Novel absorption tower for producing high-purity sulfuric acid

Abstract

The utility model provides a novel absorption tower for producing high-purity sulfuric acid, which comprises a base, a tower body arranged on the base, a gas inlet pipe arranged at one end, close to the base, of the tower body, and a cover body arranged at one end, far away from the base, of the tower body, the tower body comprises an outer tower body arranged on the base and an inner tower body arranged on the inner wall of the outer tower body, the outer tower body is made of 304 stainless steel, the inner tower body is made of titanium alloy, the inner tower body is welded to the inner wall of the outer tower body, the materials of the outer tower body and the inner tower body are arranged, the connecting mode of the outer tower body and the inner tower body is designed, and in the sulfuric acid production process, after acid fluid makes direct contact with the inner tower body, the acid fluid is separated from the inner tower body. The coating falling-off risk can be completely avoided, frequent manual maintenance is not needed, the service life of the absorption tower is remarkably prolonged, and the device has the advantages of being simple in structure, convenient to operate and convenient to popularize and implement.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of acid production equipment, and particularly relates to a novel absorption tower for high-purity sulfuric acid production. BACKGROUND

[0002] In the prior art, in the production process of high-purity sulfuric acid, the absorption tower is a key equipment, which is mainly used for absorbing sulfur trioxide SO3 gas. The absorption of sulfur trioxide SO3 gas is an important step for producing sulfuric acid. Through the absorption of sulfur trioxide SO3 gas, high-purity sulfur trioxide raw gas can be prepared from 40% nicotinic acid by evaporation, and then high-purity BV-IV or AR grade sulfuric acid can be prepared by using ultra-pure water or desalted water or ultra-pure sulfuric acid for absorption, so that large-scale industrial production of high-purity sulfuric acid can be realized.

[0003] In the prior art, the conventional absorption tower generally adopts a conventional steel structure material, and the resistance to high-purity sulfuric acid with strong corrosion is insufficient, so that the metal equipment is severely corroded, the service life of the equipment is shortened, the production efficiency is low, safety accidents can be caused, and great economic losses and environmental pollution can be caused. The existing absorption tower corrosion prevention method is usually to coat a corrosion-resistant coating on the inner wall of the absorption tower. Although these coatings can temporarily delay the corrosion speed, the service life is still low. With the increase of the service life, the corrosion-resistant coating is easy to fall off from the inner wall of the absorption tower, and manual maintenance is required, so the labor cost is high. Therefore, it is urgent to improve the absorption tower used in the production process of high-purity sulfuric acid. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the technical problems in the prior art that the conventional absorption tower has poor corrosion resistance, the service life of the equipment is short, the corrosion-resistant coating on the inner wall of the absorption tower has the risk of peeling off from the inner wall of the tower body, is easy to pollute the sulfuric acid, increases the rate of defective products, manual maintenance is required frequently, and the labor cost is high, the application provides a novel absorption tower for high-purity sulfuric acid production.

[0005] The application adopts the following scheme, a novel absorption tower for high-purity sulfuric acid production, which comprises a base, a tower body provided on the base, an air inlet pipe provided on one end of the tower body close to the base, and a cover body provided on the other end of the tower body away from the base, the tower body comprises an outer tower body provided on the base, and an inner tower body provided on the inner wall of the outer tower body, the material of the outer tower body is 304 stainless steel, the material of the inner tower body is titanium alloy, and the inner tower body is welded on the inner wall of the outer tower body.

[0006] In some possible embodiments, in the novel absorption tower for high-purity sulfuric acid production,

[0007] The thickness of the outer tower body is defined as M;

[0008] The thickness of the inner tower body is defined as N;

[0009] The M and the N satisfy the following relationship: 2.4≤M / N≤4.8.

[0010] In some possible embodiments, the M is 40mm, and the N is 13mm.

[0011] In some possible embodiments, the air inlet pipe comprises an outer pipe body arranged on the tower body and in communication with the inner side of the tower body, and an inner pipe body arranged on the inner wall of the outer pipe body and in communication with the inner side of the tower body, the material of the outer pipe body is 304 stainless steel, the material of the inner pipe body is polytetrafluoroethylene, and the outer wall of the inner pipe body is attached to the inner wall of the outer pipe body.

[0012] In some possible embodiments, a flow guide assembly arranged between the air inlet pipe and the tower body is further included, and the flow guide assembly is used to guide the fluid to the inside of the tower body.

[0013] In some possible embodiments, the flow guide assembly comprises a flow guide plate arranged on the air inlet pipe close to one end of the tower body, and the flow guide plate is arranged obliquely on the air inlet pipe.

[0014] In some possible embodiments, the angle between the flow guide plate and the air inlet pipe is defined as C in the novel high-purity sulfuric acid production absorption tower.

[0015] The C satisfies the following relationship: 45°≤C≤60°.

[0016] In some possible embodiments, the cover body comprises a cover plate arranged on the tower body, and a hand-held part arranged on the cover body.

[0017] In some possible embodiments, the base comprises a base arranged on a reference surface, and an isolation pad arranged between the base and the tower body, the material of the base is selected from carbon steel, and the material of the isolation pad is selected from polytetrafluoroethylene.

[0018] In some possible embodiments, the height of the base is defined as H1 in the novel high-purity sulfuric acid production absorption tower.

[0019] The height of the isolation pad is defined as H2.

[0020] The height of the isolation pad is defined as H2.

[0021] The H1 and the H2 satisfy the following relationship: 1.5≤H2 / H1≤2.5.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] This application provides a novel absorption tower for high-purity sulfuric acid production, comprising a base, a tower body mounted on the base, an inlet pipe mounted on the tower body near one end of the base, and a cover mounted on the tower body away from the base. The tower body includes an outer tower body mounted on the base and an inner tower body mounted on the inner wall of the outer tower body. The outer tower body is made of 304 stainless steel, and the inner tower body is made of titanium alloy. The inner tower body is welded to the inner wall of the outer tower body. By setting the materials of the outer and inner tower bodies and designing the connection method between them, the risk of coating peeling can be completely avoided when the acidic fluid comes into direct contact with the inner tower body during sulfuric acid production. This eliminates the need for frequent manual maintenance, significantly improves the service life of the absorption tower, and has the advantages of simple structure, convenient operation, and easy promotion and implementation. Attached Figure Description

[0024] Figure 1 This is a front view of an absorption tower for the production of a novel high-purity sulfuric acid according to this application.

[0025] Figure 2 This is a top view of a novel absorption tower for the production of high-purity sulfuric acid according to this application.

[0026] Figure 3 This application Figure 2 Sectional view at point AA.

[0027] Figure 4 This application Figure 2 Sectional view at point BB. Detailed Implementation

[0028] Combination Figures 1-4 The contents shown further illustrate the technical solution provided in this application: a novel absorption tower for the production of high-purity sulfuric acid, comprising a base 1, a tower body 2 disposed on the base 1, an air inlet pipe 3 disposed on one end of the tower body 2 near the base 1, and a cover 4 disposed on one end of the tower body 2 away from the base 1. The tower body 2 includes an outer tower body 20 disposed on the base 1 and an inner tower body 21 disposed on the inner wall of the outer tower body 20. The outer tower body 20 is made of 304 stainless steel, and the inner tower body 21 is made of titanium alloy. The inner tower body 21 is welded to the inner wall of the outer tower body 20.

[0029] The application provides a novel high-purity sulfuric acid production absorption tower, which comprises a base, a tower body arranged on the base, an air inlet pipe arranged on one end of the tower body close to the base, and a cover arranged on the other end of the tower body away from the base, wherein the tower body comprises an outer tower body arranged on the base and an inner tower body arranged on the inner wall of the outer tower body, the material of the outer tower body is selected from 304 stainless steel, the material of the inner tower body is selected from titanium alloy, and the inner tower body is welded on the inner wall of the outer tower body, by setting the materials of the outer tower body and the inner tower body and designing the connection mode of the outer tower body and the inner tower body, the risk of coating falling off can be completely avoided after the acidic fluid directly contacts the inner tower body during the sulfuric acid production process, manual frequent maintenance is not needed, the service life of the absorption tower is significantly prolonged, and the absorption tower has the advantages of simple structure, convenient operation and easy popularization and implementation.

[0030] In the implementation process of this embodiment, the novel high-purity sulfuric acid production absorption tower comprises a base, a tower body arranged on the base, an air inlet pipe arranged on one end of the tower body close to the base, and a cover arranged on the other end of the tower body away from the base, wherein the tower body comprises an outer tower body arranged on the base and an inner tower body arranged on the inner wall of the outer tower body, the material of the outer tower body is selected from 304 stainless steel, the material of the inner tower body is selected from titanium alloy, and the inner tower body is welded on the inner wall of the outer tower body, by setting the materials of the outer tower body and the inner tower body and designing the connection mode of the outer tower body and the inner tower body, the risk of coating falling off can be completely avoided after the acidic fluid directly contacts the inner tower body during the sulfuric acid production process, manual frequent maintenance is not needed, the service life of the absorption tower is significantly prolonged, and the absorption tower has the advantages of simple structure, convenient operation and easy popularization and implementation.

[0031] The thickness of the outer tower body 20 is defined as M;

[0032] The thickness of the inner tower body 21 is defined as N;

[0033] The M and the N satisfy the following relationship: 2.4≤M / N≤4.8.

[0034] In the implementation process of this embodiment, the value of the M is 40 mm, and the value of the N is 13 mm.

[0035] In the implementation process of this embodiment, the air inlet pipe 3 comprises an outer pipe body 30 arranged on the tower body 2 and in communication with the inner side of the tower body 2, and an inner pipe body 31 arranged on the inner wall of the outer pipe body 30 and in communication with the inner side of the tower body 2, the material of the outer pipe body 30 is selected from 304 stainless steel, the material of the inner pipe body 31 is selected from polytetrafluoroethylene, and the outer wall of the inner pipe body 31 is attached to the inner wall of the outer pipe body 30.

[0036] In the implementation process of this embodiment, a flow guide assembly 5 is further arranged between the air inlet pipe 3 and the tower body 2, and the flow guide assembly 5 is used for guiding the fluid to the inside of the tower body 2.

[0037] In the implementation process of this embodiment, the flow guide assembly 5 comprises a flow guide plate 50 arranged on one end of the air inlet pipe 3 close to the tower body 2, and the flow guide plate 50 is arranged on the air inlet pipe 3 in an inclined manner.

[0038] In the actual implementation process, the material of the flow guide plate is ceramic, the flow guide plate comprises an inclined part and a connecting part arranged on one end of the inclined part, and the flow guide plate is detachably arranged in the tower body through the connecting part.

[0039] In the implementation process of this embodiment, the angle between the flow guide plate 50 and the air inlet pipe 3 is defined as C.

[0040] The C satisfies the following relationship: 45° ≤ C ≤ 60°.

[0041] In actual implementation, C = 60°.

[0042] In actual implementation, the angle C between the deflector 50 and the air inlet pipe 3 is defined to improve the absorption efficiency of the absorption tower. This deflector structure can make the fluid more efficiently guided and accelerated before entering the air inlet pipe, thereby increasing the airflow speed and flow, and thus improving the efficiency and performance of the entire system.

[0043] The working principle and process are as follows: first, the fluid enters the deflector 50 from the air inlet pipe, and the speed of the airflow gradually increases under the guidance of the deflector slope direction. Then, the airflow enters the tower body at a certain angle C, and is further accelerated and washed in the tower body to increase the contact area between the fluid and the absorption liquid in the tower body, thereby improving the absorption efficiency.

[0044] In the implementation of this embodiment, the cover body 4 includes a cover plate 40 arranged on the tower body 2, and a hand-held part 41 arranged on the cover body 4.

[0045] In actual implementation, the hand-held part is also provided with anti-skid lines.

[0046] In the implementation of this embodiment, the base 1 includes a base 10 arranged on the reference surface, and an isolation pad 11 arranged between the base 10 and the tower body 2. The material of the base 10 is selected from carbon steel, and the material of the isolation pad 11 is selected from polytetrafluoroethylene.

[0047] In the implementation of this embodiment, the height of the base 10 is defined as H1.

[0048] The height of the isolation pad 11 is defined as H2.

[0049] The H1 and the H2 satisfy the following relationship: 1.5 ≤ H2 / H1 ≤ 2.5.

[0050] In actual implementation, H2 / H1 = 2.

[0051] The application provides a novel high-purity sulfuric acid production absorption tower, which comprises a base, a tower body arranged on the base, an air inlet pipe arranged on one end of the tower body close to the base, and a cover arranged on the other end of the tower body away from the base, wherein the tower body comprises an outer tower body arranged on the base and an inner tower body arranged on the inner wall of the outer tower body, the material of the outer tower body is selected from 304 stainless steel, the material of the inner tower body is selected from titanium alloy, and the inner tower body is welded on the inner wall of the outer tower body, by setting the materials of the outer tower body and the inner tower body and designing the connection mode of the outer tower body and the inner tower body, the risk of coating falling off can be completely avoided after the acidic fluid directly contacts the inner tower body in the sulfuric acid production process, manual frequent maintenance is not needed, the service life of the absorption tower is significantly prolonged, and the absorption tower has the advantages of simple structure, convenient operation and easy popularization and implementation.

[0052] The above is only an embodiment of the application and is not used to limit the application, and any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A novel absorption tower for the production of high-purity sulfuric acid, characterized in that, The system includes a base (1), a tower body (2) on the base (1), an air inlet pipe (3) on one end of the tower body (2) near the base (1), and a cover (4) on one end of the tower body (2) away from the base (1). The tower body (2) includes an outer tower body (20) on the base (1) and an inner tower body (21) on the inner wall of the outer tower body (20). The outer tower body (20) is made of 304 stainless steel, and the inner tower body (21) is made of titanium alloy. The inner tower body (21) is welded to the inner wall of the outer tower body (20).

2. The novel absorption tower for high-purity sulfuric acid production according to claim 1, characterized in that, The thickness of the outer tower body (20) is defined as M; The thickness of the inner tower body (21) is defined as N; The relationship between M and N is as follows: 2.4 ≤ M / N ≤ 4.

8.

3. The novel absorption tower for high-purity sulfuric acid production according to claim 2, characterized in that, The value of M is 40mm, and the value of N is 13mm.

4. The novel absorption tower for high-purity sulfuric acid production according to claim 1, characterized in that, The air inlet pipe (3) includes an outer pipe (30) disposed on the tower body (2) and communicating with the inner side of the tower body (2), and an inner pipe (31) disposed on the inner wall of the outer pipe (30) and communicating with the inner side of the tower body (2). The outer pipe (30) is made of 304 stainless steel, and the inner pipe (31) is made of polytetrafluoroethylene. The outer wall of the inner pipe (31) is attached to the inner wall of the outer pipe (30).

5. The novel absorption tower for high-purity sulfuric acid production according to claim 1, characterized in that, It also includes a flow guide assembly (5) disposed between the air inlet pipe (3) and the tower body (2), the flow guide assembly (5) being used to guide fluid into the interior of the tower body (2).

6. The novel absorption tower for high-purity sulfuric acid production according to claim 5, characterized in that, The flow guiding assembly (5) includes a flow guiding plate (50) disposed on one end of the air inlet pipe (3) near the tower body (2), and the flow guiding plate (50) is inclined on the air inlet pipe (3).

7. The novel absorption tower for high-purity sulfuric acid production according to claim 6, characterized in that, The angle between the guide vane (50) and the intake pipe (3) is defined as C; The C satisfies the following relationship: 45°≤C≤60°.

8. The novel absorption tower for high-purity sulfuric acid production according to claim 1, characterized in that, The cover (4) includes a cover plate (40) provided on the tower body (2) and a hand-held part (41) provided on the cover (4).

9. The novel absorption tower for high-purity sulfuric acid production according to claim 1, characterized in that, The base (1) includes a base (10) disposed on a reference surface and an isolation pad (11) disposed between the base (10) and the tower body (2). The base (10) is made of carbon steel and the isolation pad (11) is made of polytetrafluoroethylene.

10. A novel absorption tower for high-purity sulfuric acid production according to claim 9, characterized in that, The height of the base (10) is defined as H1; The height of the isolation pad (11) is defined as H2; H1 and H2 satisfy the following relationship: 1.5≤H2 / H1≤2.5.

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