Acid distributing device used in sulfur acid-making absorption tower

Abstract

The utility model discloses an acid distribution device used in a sulfur acid-making absorption tower. The utility model relates to the technical field of chemical equipment. The acid distribution device comprises an acid distribution header pipe and a plurality of acid distribution tanks, the acid distribution header pipe is arranged above the acid distribution tanks, and acid is injected into the acid distribution tanks through acid distribution branch pipes; a plurality of liquid discharging pipe assemblies are arranged on the two sides of the acid distribution tank and transfer acid in the acid distribution tank to a filler layer of the absorption tower; a balance pipe for communicating the two adjacent acid distribution tanks is arranged at the bottoms of the two adjacent acid distribution tanks; every two adjacent balance pipes are positioned on two sides of the center line of the cross section of the absorption tower and are equal in distance from the center line. Due to the arrangement of the balance pipe, the acid distribution uniformity among the acid distribution branch pipes can be obviously improved. Therefore, the problem of non-uniform acid distribution caused by non-uniform gas flow of the traditional acid distributor is solved, and the concentration of sulfuric acid in each area in the absorption tower is more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to an acid distribution device used in an absorption tower for sulfuric acid production. Background Art

[0002] In the sulfuric acid production process, the design and use of the acid distributor directly affects the efficiency and quality of sulfuric acid production. The existing stainless steel trough-tube acid distributor has the advantages of advanced technology, multiple and uniform acid distribution points, large operating flexibility, low packing height requirements, small tower resistance, and is made of 316L stainless steel, with reliable quality and long service life. However, in actual applications, due to the unevenness of gas flow in the absorption tower, the acid distribution amount of each acid distribution trough tube of the acid distributor may be different, with some troughs having more acid and some having less acid, which affects the acid distribution effect. Utility Model Content

[0003] The purpose of the utility model is to provide an acid separation device for use in an absorption tower for sulfuric acid production, in view of the above-mentioned deficiencies in the prior art.

[0004] The utility model discloses an acid distribution device for use in a sulfuric acid absorption tower, comprising an acid distribution main pipe and a plurality of acid distribution tanks, wherein the acid distribution main pipe is arranged above the acid distribution tanks and injects acid into the acid distribution tanks through acid distribution branch pipes; a plurality of downpipe assemblies are arranged on both sides of the acid distribution tanks, and the downpipe assemblies transfer the acid in the acid distribution tanks to a packing layer of an absorption tower; a balance pipe is arranged at the bottom of two adjacent acid distribution tanks to connect them; and the two adjacent balance pipes are located on both sides of a center line of a cross section of the absorption tower and are equidistant from the center line.

[0005] Furthermore, two adjacent balance pipes are located on both sides of the center line of the absorption tower and are equidistant from the center line.

[0006] Furthermore, a throttling plate is provided in the acid distribution tank, and the bottom end of each of the acid distribution branch pipes is located below the throttling plate.

[0007] Furthermore, the acid branch pipe is One end of the acid distribution branch pipe is fixed on the acid distribution main pipe and is connected thereto, and the other end is located in the acid distribution tank.

[0008] Furthermore, the downpipe assembly includes a plurality of vertical tubes and a plurality of inclined tubes, wherein the plurality of vertical tubes are arranged in the acid distribution tank at intervals along the length extension direction of the acid distribution tank, the bottom ends of the vertical tubes are fixed at the bottom of the acid distribution tank, and the vertical tubes are each provided with a liquid inlet, one end of the inclined tube is connected to the vertical tube, and the other end of the inclined tube is inclined downward and extends into the packing layer.

[0009] Furthermore, the top of the vertical tube is open.

[0010] Furthermore, the height of the vertical pipe is greater than the maximum liquid level of the acid distribution tank.

[0011] Furthermore, the balance pipe is a stainless steel pipe.

[0012] Furthermore, the acid separation tank is provided with a plurality of support columns at intervals along its length extension direction, the support columns are horizontally arranged at the notch of the acid separation tank, one end of the support column is fixed to one side wall of the acid separation tank, and the other end is fixed to the other side wall thereof.

[0013] The utility model adds balancing pipes at both ends between the acid-distributing tanks, so that sulfuric acid flows mutually between the acid-distributing tanks. The bottoms of two adjacent acid-distributing tanks are provided with balancing pipes for connecting them. The inlet and outlet of the balancing pipes are always located below the acid solution. A closed circulation loop is formed between the balancing pipes, the acid-distributing main pipe and each of the acid-distributing branch pipes. When the acid-distributing amount of a certain acid-distributing tank pipe is too large, the excess sulfuric acid will flow into other acid-distributing tank pipes through the balancing pipe, thereby realizing automatic balancing of the acid-distributing amounts between the acid-distributing tank pipes, achieving uniform distribution of sulfuric acid in each of the acid-distributing tanks, and improving the absorption efficiency of sulfur trioxide.

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

[0015] 1. Significant improvement in acid distribution uniformity: Through the design of the balance pipe, the utility model can significantly improve the acid distribution uniformity between the acid distribution branches. This solves the problem of uneven acid distribution caused by uneven gas flow in traditional acid distributors, ensuring that the sulfuric acid concentration in each area of ​​the absorption tower is more uniform.

[0016] 2. Enhanced operational stability: The design of the balance pipe enables the acid distribution device of the utility model to quickly adjust the acid distribution amount of each acid distribution pipe when facing the addition or subtraction of sulfuric acid load, so as to maintain the stable operation of the entire system.

[0017] 3. Extended equipment service life: Due to the improvement of acid distribution uniformity, the acid mist can reduce the corrosion problem of subsequent equipment, thus significantly extending the service life of the equipment.

[0018] 4. Reduced environmental pollution: The acid separation device of the utility model reduces the generation of waste gas by improving the efficiency and quality of sulfuric acid production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an acid separation device used in an absorption tower for sulfuric acid production according to the utility model;

[0020] Figure 2 It is a cross-sectional schematic diagram of the acid distribution device of the utility model;

[0021] Figure 3It is a structural schematic diagram of the acid separation tank of the utility model.

[0022] 1. Acid distribution main pipe; 2. Acid distribution tank; 3. Acid distribution branch pipe; 4. Balance pipe; 5. Downpipe assembly; 51. Vertical pipe; 52. Inclined pipe; 6. Packing layer; 7. Throttle plate; 8. Support column. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] Example 1

[0025] like Figure 1 and 2 As shown, the utility model is an acid distribution device for sulfuric acid absorption tower, comprising an acid distribution main pipe 1 and a plurality of acid distribution tanks 2, the acid distribution main pipe 1 is arranged above the acid distribution tank 2, and the acid is injected into each acid distribution tank 2 through the acid distribution branch pipe 3; a plurality of downpipe assemblies 5 are arranged on both sides of the acid distribution tank 2, and the downpipe assemblies 5 transfer the acid in the acid distribution tank 2 to the packing layer 6 of the absorption tower. The bottoms of two adjacent acid distribution tanks 2 are provided with a balance pipe 4 connecting them; the two adjacent balance pipes 4 are located on both sides of the center line of the cross section of the absorption tower, and the distance from the center line is equal.

[0026] The utility model adds a balance pipe 4 at both ends between the acid distribution tanks 2 and the acid distribution tanks 2, so that sulfuric acid flows mutually between the acid distribution tanks 2 and the acid distribution tanks 2. The bottoms of two adjacent acid distribution tanks 2 are provided with a balance pipe 4 for connecting them. The inlet and outlet of the balance pipe 4 are always located below the acid solution. A closed circulation loop is formed between the balance pipe 4, the acid distribution main pipe 1 and each acid distribution branch pipe 3. When the acid distribution amount of a certain acid distribution tank 2 is too large, the excess sulfuric acid will flow into other acid distribution tanks 2 through the balance pipe 4, thereby realizing automatic balance of the acid distribution amount between the acid distribution tanks 2, achieving uniform distribution of sulfuric acid in each acid distribution tank 2, and improving the absorption efficiency of sulfur trioxide.

[0027] Example 2

[0028] like Figure 1 As shown, a throttle plate 7 may be provided in the acid distribution tank 2, and the bottom end of each acid distribution branch pipe 3 is located below the throttle plate 7 to control the flow and prevent excessive flow in the acid distribution branch pipe 3.

[0029] The acid branch pipe 3 can be One end of the acid distribution branch pipe 3 is fixed on the acid distribution main pipe 1 and connected thereto, and the other end is located in the acid distribution tank 2. The acid distribution branch pipe 3 distributes the acid in the acid distribution main pipe 1 into each acid distribution tank 2 under the action of gravity.

[0030] Example 3

[0031] like Figure 1 As shown, there are many forms of the downpipe assembly 5. In this embodiment, the downpipe assembly 5 may include a plurality of vertical pipes 51 and a plurality of inclined pipes 52. The plurality of vertical pipes 51 are arranged in the acid distribution tank 2 at intervals along the length extension direction of the acid distribution tank 2. The bottom ends of the vertical pipes 51 are fixed at the bottom of the acid distribution tank 2. The vertical pipes 51 are each provided with a liquid inlet. One end of the inclined pipe 52 is connected to the vertical pipe 51, and the other end of the inclined pipe 52 is inclined downward and extends into the packing layer 6. The acid liquid in the acid distribution tank 2 enters the vertical pipe 51 through the liquid inlet, and the inclined pipe 52 evenly distributes the acid liquid in the vertical pipe 51 into the packing layer 6.

[0032] The top of the vertical pipe 51 is open, and the height of the vertical pipe 51 is greater than the maximum liquid level of the acid distribution tank 2 to prevent gas sealing.

[0033] The material of the balance pipe 4 should match the overall material of the acid distributor, that is, it should be made of 316L stainless steel to ensure its corrosion resistance and service life.

[0034] like Figure 3 As shown, the acid separation tank 2 is provided with a plurality of support columns 8 at intervals along its length extension direction. The support columns 8 are horizontally arranged at the notch of the acid separation tank 2. One end of the support column 8 is fixed to one side wall of the acid separation tank 2, and the other end is fixed to the other side wall thereof, so as to provide stability to the acid separation tank 2.

[0035] like Figure 1 and 2 As shown, the number of acid distribution tanks 2 can be five.

[0036] For matters not mentioned above, the prior art applies.

[0037] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the utility model. Those skilled in the art of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but they will not deviate from the direction of the utility model or exceed the scope defined by the attached claims. Those skilled in the art should understand that any modification, equivalent replacement, improvement, etc. made to the above implementation methods based on the technical essence of the utility model should be included in the protection scope of the utility model.

Claims

1. An acid separation device used in an absorption tower for sulfuric acid production, characterized in that: The invention comprises an acid distribution main pipe (1) and a plurality of acid distribution tanks (2), wherein the acid distribution main pipe (1) is arranged above the acid distribution tanks (2) and injects acid into each acid distribution tank (2) through an acid distribution branch pipe (3); a plurality of downpipe assemblies (5) are arranged on both sides of the acid distribution tanks (2), and the downpipe assemblies (5) transfer the acid in the acid distribution tanks (2) to a packing layer (6) of an absorption tower; a balance pipe (4) is arranged at the bottom of two adjacent acid distribution tanks (2) to connect the two adjacent balance pipes (4); the two adjacent balance pipes (4) are located on both sides of the center line of the cross section of the absorption tower and are equidistant from the center line.

2. The acid separation device for use in an absorption tower for sulfuric acid production according to claim 1, characterized in that: A throttling plate (7) is provided in the acid distribution tank (2), and the bottom end of each of the acid distribution branch pipes (3) is located below the throttling plate (7).

3. The acid separation device for use in an absorption tower for sulfuric acid production according to claim 1, characterized in that: The acid branch pipe (3) is One end of the acid distribution branch pipe (3) is fixedly mounted on the acid distribution main pipe (1) and is connected thereto, and the other end is located in the acid distribution tank (2).

4. The acid separation device for use in an absorption tower for sulfuric acid production according to claim 1, characterized in that: The downpipe assembly (5) comprises a plurality of vertical pipes (51) and a plurality of inclined pipes (52). The plurality of vertical pipes (51) are arranged in the acid separation tank (2) at intervals along the length extension direction of the acid separation tank (2). The bottom ends of the vertical pipes (51) are fixedly arranged at the bottom of the acid separation tank (2). The vertical pipes (51) are each provided with a liquid inlet. One end of the inclined pipe (52) is connected to the vertical pipe (51), and the other end of the inclined pipe (52) extends downwardly and obliquely into the packing layer (6).

5. The acid separation device for use in an absorption tower for sulfuric acid production according to claim 4, characterized in that: The top of the vertical tube (51) is open.

6. The acid separation device for use in an absorption tower for sulfuric acid production according to claim 5, characterized in that: The height of the vertical pipe (51) is greater than the maximum liquid level of the acid separation tank (2).

7. The acid separation device for use in an absorption tower for sulfuric acid production according to claim 1, characterized in that: The balance pipe (4) is a stainless steel pipe.

8. The acid separation device for use in an absorption tower for sulfuric acid production according to any one of claims 1 to 7, characterized in that: The acid separation tank (2) is provided with a plurality of support columns (8) at intervals along the length extension direction thereof; the support columns (8) are horizontally arranged at the notch of the acid separation tank (2); one end of the support column (8) is fixed to one side wall of the acid separation tank (2), and the other end is fixed to the other side wall thereof.

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