Sulfur dioxide converter capable of uniformly discharging gas

Abstract

The utility model discloses a sulfur dioxide converter capable of uniformly discharging gas. Relates to the technical field of chemical metallurgy. A partition plate is arranged in the shell, the shell is divided into an upper gas chamber and a lower gas chamber by the partition plate, and a catalyst layer for gas reaction is arranged in the upper gas chamber; the upper air chamber is communicated with the lower air chamber through a central cylinder, and an air outlet pipe communicated to the outside is arranged on the side surface of the lower air chamber; through the arrangement of the central cylinder and the gas distribution ports in the central cylinder, flue gas after reaction in the catalyst layer enters the central cylinder from the upper gas chamber, uniformly enters the lower gas chamber from the gas distribution ports uniformly distributed in the side wall of the central cylinder, and then flows out of the converter through the gas outlet pipe; and non-uniform gas distribution caused by the fact that a large amount of smoke directly flows out of one end close to the gas outlet pipe in a traditional structure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical metallurgy, in particular to a sulfur dioxide converter with uniform gas outlet. Background Art

[0002] The sulfur dioxide converter is one of the important equipment for industrial sulfuric acid production. Its function is to react the sulfur dioxide component and oxygen component in the intake air to generate sulfur trioxide through the catalytic action of the catalyst layer. With the development of the sulfuric acid industry, sulfuric acid equipment has gradually tended to be large-scale, especially some large-capacity sulfur dioxide converter equipment in the copper smelting industry has a diameter of more than 15 meters. Therefore, it is particularly important to take effective measures to ensure that the gas is evenly distributed in the catalyst layer in order to improve the catalyst utilization rate, ensure the conversion efficiency, and prevent the catalyst layer from overheating locally.

[0003] At present, there are many solutions for the top air intake and side air intake structures located in the converter air intake chamber. No air distribution measures are taken in the air outlet chamber, and only a conventional air outlet is opened on the side wall. However, according to actual production feedback on site, the temperature difference measured by the thermometer at the bottom of the catalyst layer is often large, and the gas distribution uniformity is poor. After analysis, it is believed that this situation occurs because the air outlet is set on one side of the converter air outlet chamber, resulting in low resistance near the outlet, and the flue gas at the bottom of the catalyst is more likely to flow out from the side near the air outlet, resulting in uneven gas distribution, reduced conversion efficiency, and local loss of temperature. Utility Model Content

[0004] In order to evenly distribute sulfur dioxide and improve conversion efficiency, the present application provides a sulfur dioxide converter with uniform gas output.

[0005] The present application provides a sulfur dioxide converter with uniform gas outlet, which adopts the following technical solution:

[0006] A sulfur dioxide converter with uniform gas outlet comprises a shell, the top of which is provided with an air inlet pipe and an air distribution plate; the shell is divided into an upper air chamber and a lower air chamber by a partition, and a catalyst layer for gas reaction is provided in the upper air chamber; the upper air chamber and the lower air chamber are connected through a central tube, and a gas outlet pipe connected to the outside is provided on the side of the lower air chamber.

[0007] Optionally, the central tube is a cylindrical structure with an open upper end; a plurality of air distribution ports are provided on a side wall of the central tube, and the plurality of air distribution ports are evenly spaced along a circumferential direction of the central tube.

[0008] Optionally, the air outlet pipe is a square-to-round structure, the cross-section of the connection between the air outlet pipe and the shell is square, and the cross-section of one end of the air outlet pipe away from the shell is round.

[0009] Optionally, the cross-sectional area of ​​the central tube is 1 to 1.3 times the maximum cross-sectional area of ​​the outlet pipe.

[0010] Optionally, the total area of ​​the plurality of air distribution ports is 1 to 1.3 times the maximum cross-sectional area of ​​the air outlet pipe.

[0011] Optionally, the partition is an annular plate, and the inner diameter of the central opening is equal to the outer diameter of the central tube.

[0012] Optionally, the partition is in an arched shape protruding toward the upper air chamber.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] The present application arranges the central tube and the air distribution ports on the central tube so that the flue gas after the reaction in the catalyst layer enters the central tube in the upper air chamber, enters the lower air chamber evenly from the air distribution ports evenly distributed on the side wall of the central tube, and then flows out of the converter through the air outlet pipe, thereby avoiding the uneven gas distribution caused by a large amount of flue gas directly flowing out from one end close to the air outlet pipe in the traditional structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a cross-sectional view of the overall structure of a sulfur dioxide converter with uniform gas outlet according to the present application;

[0016] Figure 2 yes Figure 1 The overall structure diagram of the central tube.

[0017] Description of reference numerals:

[0018] 1. Shell; 11. Air inlet pipe; 12. Air outlet pipe; 13. Air distribution plate; 2. Upper air chamber; 3. Catalyst layer; 4. Partition; 5. Lower air chamber; 6. Center tube; 61. Air distribution port. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-2 This application is described in further detail.

[0020] The embodiment of the present application discloses a sulfur dioxide converter with uniform gas outlet; it includes a shell 1 of the converter, an air inlet pipe 11 is provided on the top of the shell 1, and an air distribution plate 13 is provided on the shell 1 below the air inlet pipe 11; a partition 4 is provided in the shell 1, and the internal space of the shell 1 is divided into two parts by the partition 4, wherein the space on the upper side is an upper air chamber 2, and the space on the lower side is a lower air chamber 5; a catalyst layer 3 is provided in the upper air chamber 2, and the gas reacts in the catalyst layer 3; the partition 4 is an annular plate, and a central tube 6 is provided at the center thereof, and the central tube 6 is a hollow tube, and a plurality of air distribution ports 61 are evenly spaced apart on the outer wall thereof along the circumferential direction, and the upper air chamber 2 is connected to the lower air chamber 5 through the central tube 6; at the same time, an air outlet pipe 12 is connected on the side wall of the lower air chamber 5.

[0021] When the converter is in operation, the reacted gas enters the upper air chamber 2 from the air inlet pipe 11, then reacts in the catalyst layer 3, and when it sinks to the partition 4, it evenly enters the lower air chamber 5 from the air distribution port 61 of the central tube 6, and then is discharged from the air outlet pipe 12; this avoids the uneven gas distribution caused by a large amount of flue gas directly flowing out from the side close to the air outlet pipe 12 in the traditional structure, thereby improving the conversion efficiency.

[0022] In order to further improve the uniformity of air outlet; the air outlet pipe 12 is a square-to-circular structure, the cross-section of the connection between the air outlet pipe 12 and the shell 1 is square, and the end of the air outlet pipe 12 is circular; the cross-sectional area of ​​the central tube 6 is 1.1 times the maximum cross-sectional area of ​​the air outlet pipe 12 (i.e. the area of ​​the end circle); the total area of ​​all air distribution ports 61 on the central tube 6 is 1.1 times the maximum cross-sectional area of ​​the air outlet pipe 12 (i.e. the area of ​​the end circle); thereby effectively improving the uniformity of air outlet; the partition 4 is also set as an annular plate, whose inner diameter matches the outer diameter of the central tube 6, and the central tube 6 is just inserted in the middle of the partition 4, and the partition 4 is an upwardly protruding arched plate.

[0023] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sulfur dioxide converter for homogenizing outgoing gas, characterized in that: The invention comprises a shell (1), wherein an air inlet pipe (11) is provided at the top of the shell (1), and an air distribution plate (13) is provided below the air inlet pipe (11); a partition plate (4) is provided in the shell (1), and the shell (1) is divided into an upper air chamber (2) and a lower air chamber (5) by the partition plate (4); a catalyst layer (3) for gas reaction is provided in the upper air chamber (2); the upper air chamber (2) and the lower air chamber (5) are connected through a central tube (6), and an air outlet pipe (12) connected to the outside is provided on the side of the lower air chamber (5).

2. A sulfur dioxide converter with uniform gas outlet according to claim 1, characterized in that: The central tube (6) is a cylindrical structure with an open upper end; a plurality of air distribution openings (61) are provided on the side wall of the central tube (6), and the plurality of air distribution openings (61) are evenly spaced along the circumferential direction of the central tube (6).

3. A sulfur dioxide converter with uniform gas outlet according to claim 2, characterized in that: The air outlet pipe (12) is a square-to-round structure; the cross section of the connection between the air outlet pipe (12) and the shell (1) is square; and the cross section of the end of the air outlet pipe (12) away from the shell (1) is round.

4. A sulfur dioxide converter with uniform gas outlet according to claim 3, characterized in that: The cross-sectional area of ​​the central tube (6) is 1 to 1.3 times the maximum cross-sectional area of ​​the air outlet pipe (12).

5. A sulfur dioxide converter with uniform gas outlet according to claim 2, characterized in that: The total area of ​​the plurality of air distribution ports (61) is 1 to 1.3 times the maximum cross-sectional area of ​​the air outlet pipe (12).

6. A sulfur dioxide converter with uniform gas outlet according to claim 1, characterized in that: The partition plate (4) is an annular plate, and the inner diameter of the central opening is equal to the outer diameter of the central tube (6).

7. A sulfur dioxide converter with uniform gas outlet according to claim 6, characterized in that: The partition plate (4) is an arched plate protruding toward the upper air chamber (2).

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