Heat exchange system for producing sulfuric acid

Abstract

The utility model provides a heat exchange system for producing sulfuric acid, which comprises a base, a liquid outlet assembly arranged on the base, a heat exchange assembly arranged above the liquid outlet assembly and communicated with the liquid outlet assembly, and a liquid inlet assembly arranged above the heat exchange assembly and communicated with the heat exchange assembly, the refrigerant is arranged in the heat exchange tube set, the heat exchange tube set is made of 316 stainless steel, and the shell is made of 304 stainless steel, so that the anti-corrosion performance of the heat exchange assembly can be effectively improved, and the heat exchange assembly is not prone to rusting and cracking and high in safety coefficient under the use scene of high-temperature and high-concentration sulfuric acid for a long time; the heat exchanger has the advantages of stable heat exchange efficiency, low maintenance cost, simple structure, low implementation cost, long service life and convenience in popularization and implementation.

Description

Technical Field

[0001] This application belongs to the field of acid production equipment technology, specifically relating to a heat exchange system for producing sulfuric acid. Background Technology

[0002] In existing technologies, sulfuric acid is an important industrial chemical raw material. The production process involves high temperature and high pressure, and harsh working environment. In the sulfuric acid production process, the heat exchange system is a very important component. It can effectively improve energy utilization efficiency and reduce production costs. In the sulfuric acid production process, the main function of the heat exchanger is to exchange the heat generated in the sulfuric acid production process with cold water, transfer the heat to the cold water, and then warm the cold water before it enters the reaction system, thereby reducing the waste of heat energy.

[0003] In the existing technology, on the one hand, the traditional sulfuric acid heat exchange system has low heat exchange efficiency, low contact area between acidic fluid and heat exchange system, low heat utilization rate, and a lot of heat energy waste. On the other hand, the existing sulfuric acid heat exchanger is usually made of carbon steel, which has poor corrosion resistance and is prone to rusting and cracking in high temperature and high concentration sulfuric acid environment, which seriously affects heat exchange efficiency, production safety and increases equipment maintenance costs. Therefore, it is urgent to make improvements. Utility Model Content

[0004] This application aims to address the technical problems of existing sulfuric acid heat exchange systems, such as low heat exchange efficiency, low contact area between acidic fluid and heat exchange system, inability to quickly cool high-temperature acidic fluid, high heat loss, poor corrosion resistance, rusting and cracking after long-term use, high maintenance costs, and low safety factor. The application proposes a heat exchange system for sulfuric acid production.

[0005] This application adopts the following scheme: a heat exchange system for producing sulfuric acid, including a base, a liquid outlet assembly disposed on the base, a heat exchange assembly disposed above and communicating with the liquid outlet assembly, and a liquid inlet assembly disposed above and communicating with the heat exchange assembly. The heat exchange assembly includes a shell disposed above the liquid inlet assembly and a heat exchange tube assembly disposed within the shell. The heat exchange tube assembly contains a refrigerant. The heat exchange tube assembly is made of 316 stainless steel, and the shell is made of 304 stainless steel. The liquid inlet assembly is used to supply fluid inflow, and the liquid outlet assembly is used to supply fluid outflow.

[0006] In some possible embodiments, the heat exchange assembly further includes a partition plate disposed on the housing and a plurality of mounting holes disposed on the partition plate, wherein the heat exchange tube assembly can be fitted into the mounting holes so that the heat exchange tube assembly can be detachably disposed on the partition plate.

[0007] In some possible embodiments, multiple partitions are spaced apart along the height direction of the housing, and the number of partitions is defined as N, where N satisfies the following relationship: 2≤N≤5.

[0008] In some possible embodiments, the partition is made of polytetrafluoroethylene.

[0009] In some possible embodiments, the heat exchange assembly further includes a first port on the upper end of the housing, a second port on the lower end of the housing, and a delivery pump located between the first port and the second port. Refrigerant can flow into the heat exchange tube assembly through the first port and then flow out through the second port.

[0010] In some possible embodiments, the heat exchange tube group includes multiple heat exchange single tubes, and the number of the heat exchange single tubes is defined as M, wherein M satisfies the following relationship: 50≤M≤150.

[0011] In some possible embodiments, the liquid inlet assembly includes a first cover disposed on the heat exchange assembly and a liquid inlet disposed on the first cover, wherein the first cover is made of 304 stainless steel and the liquid inlet is made of polytetrafluoroethylene.

[0012] In some possible embodiments, the liquid outlet assembly includes a second cover disposed on the base and a liquid outlet disposed on the second cover, wherein the second cover is made of 304 stainless steel and the liquid outlet is made of polytetrafluoroethylene.

[0013] In some possible embodiments, the base is made of silicon dioxide.

[0014] Compared with the prior art, this application has the following beneficial effects:

[0015] This application provides a heat exchange system for producing sulfuric acid, comprising a base, a liquid outlet assembly mounted on the base, a heat exchange assembly positioned above and connected to the liquid outlet assembly, and a liquid inlet assembly positioned above and connected to the heat exchange assembly. The heat exchange assembly includes a shell positioned above the liquid inlet assembly and a heat exchange tube assembly within the shell. By using a refrigerant within the heat exchange tube assembly, and selecting 316 stainless steel for the heat exchange tube assembly and 304 stainless steel for the shell, the corrosion resistance of the heat exchange assembly can be effectively improved. Under prolonged use in high-temperature, high-concentration sulfuric acid applications, the heat exchange assembly is less prone to rusting and cracking, exhibiting a high safety factor, stable heat exchange efficiency, and low maintenance costs. It also boasts advantages such as simple structure, low implementation cost, long service life, and ease of promotion and implementation. Attached Figure Description

[0016] Figure 1 This is a front view of a heat exchange system for producing sulfuric acid according to this application;

[0017] Figure 2 This application Figure 1 Sectional view at point AA;

[0018] Figure 3 This application Figure 2 A magnified view of a portion of point A in the middle. Detailed Implementation

[0019] Combination Figure 1-3 The content shown further illustrates the technical solution provided in this application. A heat exchange system for producing sulfuric acid includes a base 1, a liquid outlet component 2 disposed on the base 1, a heat exchange component 3 disposed above and connected to the liquid outlet component 2, and a liquid inlet component 4 disposed above and connected to the heat exchange component 3. The heat exchange component 3 includes a shell 30 disposed above the liquid inlet component 4, and a heat exchange tube assembly 31 disposed within the shell 30. The heat exchange tube assembly 31 contains a refrigerant. The heat exchange tube assembly 31 is made of 316 stainless steel, and the shell 30 is made of 304 stainless steel. The liquid inlet component 4 is used to supply fluid inflow, and the liquid outlet component 2 is used to supply fluid outflow.

[0020] This application provides a heat exchange system for producing sulfuric acid, comprising a base, a liquid outlet assembly mounted on the base, a heat exchange assembly positioned above and connected to the liquid outlet assembly, and a liquid inlet assembly positioned above and connected to the heat exchange assembly. The heat exchange assembly includes a shell positioned above the liquid inlet assembly and a heat exchange tube assembly within the shell. By using a refrigerant within the heat exchange tube assembly, and selecting 316 stainless steel for the heat exchange tube assembly and 304 stainless steel for the shell, the corrosion resistance of the heat exchange assembly can be effectively improved. Under prolonged use in high-temperature, high-concentration sulfuric acid applications, the heat exchange assembly is less prone to rusting and cracking, exhibiting a high safety factor, stable heat exchange efficiency, and low maintenance costs. It also boasts advantages such as simple structure, low implementation cost, long service life, and ease of promotion and implementation.

[0021] In this embodiment, the heat exchange assembly 3 further includes a partition plate 32 disposed on the housing 30, and a plurality of mounting holes disposed on the partition plate 32. The heat exchange tube assembly 31 can be matched and extended into the mounting holes so that the heat exchange tube assembly 31 can be detachably disposed on the partition plate 32.

[0022] In this embodiment, multiple partitions 32 are spaced apart along the height direction of the housing 30. The number of partitions 32 is defined as N, and N satisfies the following relationship: 2≤N≤5.

[0023] For example, N can take the values ​​2, 3, 4, or 5.

[0024] In actual implementation, N is set to 3.

[0025] In actual implementation, multiple baffles are set to facilitate the disassembly of the heat exchange tube assembly, which facilitates later maintenance and replacement and improves the mechanical stability of the heat exchange tube assembly. Specifically, multiple baffles are distributed at intervals according to the height of the shell, and each baffle is equipped with mounting holes. The heat exchange tube assembly can be matched and inserted into these mounting holes to achieve fixation with the baffle. The number of baffles can be flexibly selected according to actual needs. This design not only ensures heat exchange efficiency, but also makes the maintenance and replacement of heat exchange components more convenient and efficient.

[0026] In this embodiment, the partition 32 is made of polytetrafluoroethylene.

[0027] In this embodiment, the heat exchange assembly 3 further includes a first port 33 located on the upper end of the housing 30, a second port 34 located on the lower end of the housing 30, and a delivery pump located between the first port 33 and the second port 34. The refrigerant can flow into the heat exchange tube group 31 through the first port 33 and then flow out through the second port 34.

[0028] In this embodiment, the heat exchange tube group 31 includes multiple heat exchange single tubes 310. The number of heat exchange single tubes 310 is defined as M, and M satisfies the following relationship: 50≤M≤150.

[0029] For example, the value of M can be 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, etc.

[0030] In actual implementation, the value of M is 124.

[0031] In actual implementation, by setting the value of M to 124, the contact area between the acidic fluid and the heat exchange components can be effectively increased, the heat exchange efficiency can be improved, the heat utilization rate can be increased, the heat waste can be reduced, and the electricity cost can be lowered.

[0032] In this embodiment, the liquid inlet assembly 4 includes a first cover 40 disposed on the heat exchange assembly 3 and a liquid inlet 41 disposed on the first cover 40. The first cover 40 is made of 304 stainless steel, and the liquid inlet 41 is made of polytetrafluoroethylene.

[0033] In this embodiment, the liquid outlet component 2 includes a second cover 20 disposed on the base 1 and a liquid outlet 21 disposed on the second cover 20. The second cover 20 is made of 304 stainless steel, and the liquid outlet 21 is made of polytetrafluoroethylene.

[0034] In this embodiment, the base 1 is made of silicon dioxide.

[0035] In actual implementation, the flow direction of the acidic fluid is opposite to that of the refrigerant, which can effectively increase the contact area between the acidic fluid and the heat exchange components, effectively improve heat exchange efficiency, reduce heat loss, and save energy costs for enterprises.

[0036] This application provides a heat exchange system for producing sulfuric acid, comprising a base, a liquid outlet assembly mounted on the base, a heat exchange assembly positioned above and connected to the liquid outlet assembly, and a liquid inlet assembly positioned above and connected to the heat exchange assembly. The heat exchange assembly includes a shell positioned above the liquid inlet assembly and a heat exchange tube assembly within the shell. By using a refrigerant within the heat exchange tube assembly, and selecting 316 stainless steel for the heat exchange tube assembly and 304 stainless steel for the shell, the corrosion resistance of the heat exchange assembly can be effectively improved. Under prolonged use in high-temperature, high-concentration sulfuric acid applications, the heat exchange assembly is less prone to rusting and cracking, exhibiting a high safety factor, stable heat exchange efficiency, and low maintenance costs. It also boasts advantages such as simple structure, low implementation cost, long service life, and ease of promotion and implementation.

[0037] 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 heat exchange system for producing sulfuric acid, characterized in that, The device includes a base (1), a liquid outlet assembly (2) disposed on the base (1), a heat exchange assembly (3) disposed above and connected to the liquid outlet assembly (2), and a liquid inlet assembly (4) disposed above and connected to the heat exchange assembly (3). The heat exchange assembly (3) includes a housing (30) disposed above the liquid inlet assembly (4) and a heat exchange tube assembly (31) disposed inside the housing (30). The heat exchange tube assembly (31) contains a refrigerant. The heat exchange tube assembly (31) is made of 316 stainless steel, and the housing (30) is made of 304 stainless steel. The liquid inlet assembly (4) is used to supply fluid inflow, and the liquid outlet assembly (2) is used to supply fluid outflow.

2. The heat exchange system for producing sulfuric acid according to claim 1, characterized in that, The heat exchange assembly (3) further includes a partition (32) disposed on the housing (30) and a plurality of mounting holes disposed on the partition (32), wherein the heat exchange tube assembly (31) can be matched and extended into the mounting holes so that the heat exchange tube assembly (31) can be detachably disposed on the partition (32).

3. A heat exchange system for producing sulfuric acid according to claim 2, characterized in that, The partition (32) is provided in multiple spaced intervals along the height direction of the shell (30), and the number of the partition (32) is defined as N, where N satisfies the following relationship: 2≤N≤5.

4. A heat exchange system for producing sulfuric acid according to claim 2, characterized in that, The partition (32) is made of polytetrafluoroethylene.

5. A heat exchange system for producing sulfuric acid according to claim 2, characterized in that, The heat exchange assembly (3) further includes a first port (33) located on the upper end of the housing (30), a second port (34) located on the lower end of the housing (30), and a delivery pump located between the first port (33) and the second port (34). The refrigerant can flow into the heat exchange tube group (31) through the first port (33) and then flow out through the second port (34).

6. A heat exchange system for producing sulfuric acid according to claim 1, characterized in that, The heat exchange tube group (31) includes multiple heat exchange single tubes (310), and the number of heat exchange single tubes (310) is defined as M, wherein M satisfies the following relationship: 50≤M≤150.

7. A heat exchange system for producing sulfuric acid according to claim 1, characterized in that, The liquid inlet assembly (4) includes a first cover (40) disposed on the heat exchange assembly (3) and a liquid inlet (41) disposed on the first cover (40). The first cover (40) is made of 304 stainless steel, and the liquid inlet (41) is made of polytetrafluoroethylene.

8. A heat exchange system for producing sulfuric acid according to claim 1, characterized in that, The liquid outlet assembly (2) includes a second cover (20) disposed on the base (1) and a liquid outlet (21) disposed on the second cover (20). The second cover (20) is made of 304 stainless steel, and the liquid outlet (21) is made of polytetrafluoroethylene.

9. A heat exchange system for producing sulfuric acid according to claim 1, characterized in that, The base (1) is made of silicon dioxide.

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