Refined sulfuric acid absorption tower capable of uniformly distributing acid based on low-temperature decomposition

Abstract

The utility model relates to the technical field of sulfuric acid preparation, and discloses a refined sulfuric acid absorption tower capable of uniformly distributing acid based on low-temperature decomposition, which comprises a treatment tower assembly, the treatment tower assembly comprises a tower body, the left side of the inner cavity of the tower body is communicated with a gas inlet pipe, the bottom of the tower body is communicated with a liquid discharge pipe, a filler body is arranged in the tower body, and the filler body is arranged in the tower body. The right side of the inner cavity of the tower body is communicated with a circulating pipe, and the top of the tower body is communicated with an exhaust pipe. According to the acid spraying tower, acid can be uniformly distributed, the collecting hopper can rotate after acid spraying, drainage treatment is carried out by matching with the drainage strip and the flow dividing groove, primary liquid separation can be carried out, transmitted acid liquid can be drained and discharged through the multiple spraying holes, the distribution uniformity of the acid liquid in the tower body is ensured, secondary liquid separation can be carried out, and the acid spraying efficiency is improved. Falling acid liquor can be further guided and conveyed, the distribution uniformity of the acid liquor in the tower body is improved, and the wall flow phenomenon is well coped with.

Description

Technical Field

[0001] This utility model relates to the field of sulfuric acid preparation technology, specifically to a purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation. Background Technology

[0002] The sulfuric acid absorption tower is the core equipment in sulfuric acid production. It is mainly used to absorb sulfur trioxide and generate sulfuric acid. It is usually divided into two sections: a high-temperature section in the lower layer and a low-temperature section in the upper layer. The high-temperature section (about 160-220℃) is used for the initial absorption of SO3 and recovery of reaction heat, while the low-temperature section (about 75-90℃) uses 98%-98.5% concentrated sulfuric acid to achieve efficient absorption of residual SO3 and control acid mist.

[0003] Existing sulfuric acid absorption towers generally use a distributor to spray the acid solution, which then contacts the rising gas in the packing to complete the absorption process. However, the following problems still exist:

[0004] 1. After the acid is sprayed out, under the action of gravity, wall flow is likely to occur inside the tower, and the acid moves closer to the inside of the tower, affecting the uniformity of the reaction with the gas phase.

[0005] 2. The acid drop position cannot be dynamically adjusted. A multi-hole distributor is used, but the drop position is fixed, resulting in generally uneven acid distribution. Utility Model Content

[0006] Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a refined sulfuric acid absorption tower based on low-temperature decomposition for uniform acid separation. The main purpose is to solve the problem that the acid drop position in existing sulfuric acid absorption towers is fixed and cannot be dynamically adjusted, thus affecting the uniformity of acid separation.

[0008] Technical solution

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation includes a treatment tower assembly. The treatment tower assembly includes a tower body. An air inlet pipe is connected to the left side of the tower body cavity, a liquid outlet pipe is connected to the bottom of the tower body, a packing body is installed inside the tower body, a circulation pipe is connected to the right side of the tower body cavity, an exhaust pipe is connected to the top of the tower body, a liquid inlet pipe is connected to the front side of the tower body, and a distribution assembly is provided at the top of the tower body, including a spray hood located inside the tower body. A liquid delivery pipe is connected to the center of the top of the spray hood, spray holes are opened at the bottom of the spray hood, a pressure-retaining member is installed through the center of the spray hood, a collection hopper is provided at the bottom of the spray hood, and a guide strip is fixed at the bottom of the collection hopper.

[0011] Furthermore, the end of the infusion tube furthest from the spray hood is fixed to the circulation tube and is connected to the circulation tube.

[0012] Furthermore, the outer ring of the collection hopper is movably connected to the tower body via a sealed bearing, and the inner diameter of the collection hopper is larger than the outer diameter of the bottom of the spray hood.

[0013] Furthermore, the pressure member includes a movable rod movably connected to the center of the bottom of the spray hood, and a turbine is fixed to the top of the movable rod.

[0014] Furthermore, a sliding sleeve is slidably connected to the movable rod, a protrusion is fixed on one side of the sliding sleeve, a vertical rod is fixed on the sliding sleeve, and a pressure plate is fixed at the bottom of the vertical rod.

[0015] Furthermore, a first semi-arc plate is fixed at the bottom of the spray hood, and a second semi-arc plate is provided on the front side of the first semi-arc plate.

[0016] Furthermore, both the first and second semi-arc plates are provided with arc grooves, and there are two arc grooves in total, with a spiral groove between the two arc grooves.

[0017] Furthermore, a connecting frame is fixed on the movable rod, and one end of the connecting frame is fixed inside the collection hopper.

[0018] Furthermore, a diversion groove is provided at the top of the diversion strip, and a through groove is provided at the end of the diversion strip away from the collection hopper.

[0019] Beneficial effects

[0020] Compared with the prior art, this utility model provides a purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation, which has the following beneficial effects:

[0021] 1. This utility model achieves uniform acid distribution by setting up a distribution component. After acid spraying, the collection hopper can rotate, and the flow guide strip and flow divider can be used for flow treatment. This solves the problem in the prior art that the acid drop position of the sulfuric acid absorption tower is fixed and cannot be dynamically adjusted, which affects the uniformity of acid distribution.

[0022] 2. This utility model achieves the function of preliminary liquid separation by setting up a spray hood and spray holes, which can guide the acid liquid being transferred out through multiple spray holes, ensuring the uniform distribution of acid liquid in the tower body.

[0023] 3. This utility model achieves the function of rotation drive by setting up an infusion tube, a turbine and a movable rod, which can make the movable rod rotate when the acid falls.

[0024] 4. This utility model achieves the function of secondary liquid separation by setting up the flow guide strip, the flow divider and the through channel, which can further guide and transport the falling acid liquid, improve the uniformity of acid liquid distribution in the tower body, and effectively deal with the wall flow phenomenon.

[0025] 5. This utility model achieves the function of repeated displacement through the first semi-arc plate, spiral groove, sliding sleeve, second semi-arc plate, connecting frame and protrusion. With the cooperation of protrusion, spiral groove and connecting frame, the sliding sleeve will also produce up and down displacement when it rotates. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the front three-dimensional structure of a purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation proposed in this utility model.

[0027] Figure 2 This is a half-sectional view of a purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation proposed in this utility model.

[0028] Figure 3 This is a partial cross-sectional view of the structure of a refined sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation, as proposed in this utility model.

[0029] Figure 4 This is a cross-sectional view of the distribution components of a purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation, as proposed in this utility model.

[0030] Figure 5 This is a bottom view of the collection hopper structure of a purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation proposed in this utility model.

[0031] Figure 6 This invention presents a diagram showing the movable rod, the first semi-arc plate, and the second semi-arc plate of a refined sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation.

[0032] Figure 7 This is a front view showing the separation of the first semi-arc plate, the sliding sleeve, and the second semi-arc plate in a refined sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation, as proposed in this utility model.

[0033] Figure 8 The first semi-arc plate, the sliding sleeve, and the second semi-arc plate of the purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation proposed in this utility model are shown in the following view after separation.

[0034] Figure 9 This is a schematic diagram of the sliding sleeve structure of a purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation, as proposed in this utility model.

[0035] In the diagram: 100, processing tower assembly; 101, tower body; 102, air inlet pipe; 103, liquid outlet pipe; 104, packing material; 105, circulation pipe; 106, exhaust pipe; 107, liquid inlet pipe; 200, distribution assembly; 201, spray hood; 202, liquid delivery pipe; 203, turbine; 204, nozzle; 205, collection hopper; 206, guide strip; 207, pressure component; 208, diversion channel; 209, through channel; 210, movable rod; 211, first semi-arc plate; 212, spiral groove; 213, sliding sleeve; 214, vertical rod; 215, pressure plate; 216, second semi-arc plate; 217, connecting frame; 218, protrusion; 219, arc groove. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0037] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely for distinguishing the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this utility model, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] Reference Figures 1-9A purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation includes a processing tower assembly 100. The processing tower assembly 100 includes a tower body 101. An air inlet pipe 102 is connected to the left side of the inner cavity of the tower body 101. A drain pipe 103 is connected to the bottom of the tower body 101. A packing body 104 is installed inside the tower body 101. A circulation pipe 105 is connected to the right side of the inner cavity of the tower body 101. An exhaust pipe 106 is connected to the top of the tower body 101. A liquid inlet pipe 107 is connected to the front side of the inner cavity of the tower body 101. A distribution assembly 200 is provided at the top of the tower body 101, including a spray hood 201 located inside the tower body 101. A liquid delivery pipe 202 is connected to the center of the top of the spray hood 201. A spray hole 204 is opened at the bottom of the spray hood 201. A pressure member 207 is installed through the center of the spray hood 201. A collection hopper 205 is provided at the bottom of the spray hood 201. A guide strip 206 is fixed at the bottom of the collection hopper 205.

[0040] Furthermore, there are two packing bodies 104, both of which are installed inside the tower body 101. In practical applications, a gas redistributor is installed between the upper and lower packing bodies 104 to improve the uniformity of gas rise and facilitate reaction uniformity.

[0041] Specifically, the end of the infusion tube 202 away from the spray hood 201 is fixed to the circulation tube 105 and is connected to the circulation tube 105.

[0042] It should be noted that the infusion tube 202 is L-shaped, which can guide the acid solution flowing into the circulation tube 105 into the spray hood 201.

[0043] Furthermore, the spray hood 201 is shaped like a hollow frustum, which can effectively guide the acid solution entering from the center to the sides, improving the uniformity of acid solution distribution within the tower body 101.

[0044] Specifically, the outer ring of the collection hopper 205 is movably connected to the tower body 101 through a sealed bearing, and the inner diameter of the collection hopper 205 is larger than the outer diameter of the bottom of the spray hood 201.

[0045] It should be noted that the top of the collection hopper 205 is inclined, which can effectively guide the acid liquid on the wall of the tower body 101 to be concentrated into the collection hopper 205.

[0046] Furthermore, the inner diameter of the collection hopper 205 is larger than that of the spray hood 201, which can effectively guide the falling acid liquid.

[0047] Specifically, the pressure member 207 includes a movable rod 210 movably connected to the center of the bottom of the spray hood 201, and a turbine 203 is fixed to the top of the movable rod 210.

[0048] It should be noted that the outer ring of the movable rod 210 is movably connected to the spray hood 201 through a sealed bearing, which not only meets the rotation requirement of the movable rod 210, but also prevents acid from seeping through the connection between the movable rod 210 and the spray hood 201.

[0049] Specifically, a sliding sleeve 213 is slidably connected to the movable rod 210, a protrusion 218 is fixed on one side of the sliding sleeve 213, a vertical rod 214 is fixed on the sliding sleeve 213, and a pressure plate 215 is fixed at the bottom of the vertical rod 214.

[0050] It should be noted that the end of the protrusion 218 away from the sliding sleeve 213 has an arc-shaped design, as shown in the attached diagram in the instruction manual. Figure 7 As shown.

[0051] Furthermore, the connecting frame 217 has a groove that engages with the vertical rod 214 to provide space for the vertical rod 214 to slide up and down.

[0052] The drainage strip 206 includes a spring steel sheet and a polytetrafluoroethylene coating on the spring steel sheet. This design not only ensures that the drainage strip 206 has good elasticity, but also prevents sulfuric acid from corroding the drainage strip 206.

[0053] The bottom of the pressure plate 215 contacts the top of the drainage strip 206. When the pressure plate 215 moves down, it can press against the drainage strip 206 to produce elastic deformation.

[0054] Specifically, a first semi-arc plate 211 is fixed at the bottom of the spray hood 201, and a second semi-arc plate 216 is provided on the front side of the first semi-arc plate 211.

[0055] It should be noted that the top of the second semi-arc plate 216 is fixed to the bottom of the spray hood 201, and the first semi-arc plate 211 and the second semi-arc plate 216 are symmetrically arranged on the front and rear sides of the sliding sleeve 213.

[0056] Specifically, both the first semi-arc plate 211 and the second semi-arc plate 216 are provided with arc grooves 219, and there are two arc grooves 219. A spiral groove 212 is provided between the two arc grooves 219.

[0057] It should be noted that two adjacent arc grooves 219 are in a connected state, and both the spiral groove 212 and the arc groove 219 are engaged with the protrusion 218.

[0058] Specifically, a connecting frame 217 is fixed on the movable rod 210, and one end of the connecting frame 217 is fixed inside the collection hopper 205.

[0059] It should be noted that, further, the movable rod 210 includes two cylindrical rods and a single rectangular rod, the rectangular rod being fixed between the upper and lower cylindrical rods, as shown in the attached diagram of the instruction manual. Figure 9As shown, the upper cylindrical rod is movably mounted on the spray hood 201, and the lower cylindrical rod is fixed on the connecting frame 217.

[0060] Furthermore, the sliding sleeve 213 has a rectangular groove inside, which cooperates with the rectangular rod. This design allows the sliding sleeve 213 to rotate synchronously when the movable rod 210 rotates, and the sliding sleeve 213 can also move up and down.

[0061] Specifically, a diversion groove 208 is provided at the top of the diversion strip 206, and a through groove 209 is provided at the end of the diversion strip 206 away from the collection hopper 205.

[0062] It should be noted that there are several diversion channels 208, which are evenly distributed on the diversion strips 206. They can guide the acid on the diversion strips 206 to the side and improve the uniformity of acid distribution.

[0063] Furthermore, the through groove 209 is a spiral groove, as shown in the attached diagram of the instruction manual. Figure 5 As shown, this design allows the drainage positions at one end of multiple drainage strips 206 to be different, thereby effectively increasing the uniform falling range of acid solution when the collection hopper 205 and the drainage strips 206 rotate.

[0064] The working principle of this utility model:

[0065] S1. Sulfur trioxide gas enters through the inlet pipe 102, and the raw sulfuric acid liquid first enters through the liquid inlet pipe 107. The gas and liquid phases are collected and reacted in the packing body 104. After absorption and purification, the gas is discharged through the exhaust pipe 106, and the liquid phase is discharged through the liquid outlet pipe 103. The external pump is used to circulate the liquid, which is placed through the circulation pipe 105 to complete the circulation spray.

[0066] S2. After the acid solution is placed into the circulation pipe 105, it is guided into the spray hood 201 by the infusion pipe 202. The acid solution is sprayed through the spray hole 204 to complete the initial homogenization.

[0067] S3. The flowing acid will cause the turbine 203 to rotate, which will drive the movable rod 210 to rotate synchronously and link the sliding sleeve 213 to rotate. With the cooperation of the protrusion 218, the arc groove 219 and the spiral groove 212, when the movable rod 210 rotates in one direction, the sliding sleeve 213 will repeatedly move up and down to link the vertical rod 214 and the pressure plate 215 to move.

[0068] S4. When the pressure plate 215 moves down, it presses against the second semi-arc plate 216 and produces elastic deformation, and the tilt angle of the second semi-arc plate 216 changes. When the pressure plate 215 moves up, the second semi-arc plate 216 naturally returns to its original position, and its tilt angle also changes.

[0069] S5. When the movable rod 210 rotates, the collecting hopper 205 and multiple guide strips 206 rotate simultaneously under the connection of the connecting frame 217. With the continuous change of the tilt angle of the guide strips 206, the falling acid liquid can be guided evenly in a secondary manner, which can effectively improve the uniformity of acid separation and better meet the actual use requirements.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation, comprising a processing tower assembly (100), characterized in that, The processing tower assembly (100) includes a tower body (101), an air inlet pipe (102) connected to the left side of the inner cavity of the tower body (101), a drain pipe (103) connected to the bottom of the tower body (101), a packing body (104) installed inside the tower body (101), a circulation pipe (105) connected to the right side of the inner cavity of the tower body (101), an exhaust pipe (106) connected to the top of the tower body (101), and an inlet pipe (107) connected to the front side of the inner cavity of the tower body (101). (101) The top of the interior is provided with a distribution component (200), including a spray hood (201) located inside the tower body (101). A liquid delivery pipe (202) is connected to the center of the top of the spray hood (201). A spray hole (204) is opened at the bottom of the spray hood (201). A pressure member (207) is installed through the center of the spray hood (201). A collection hopper (205) is provided at the bottom of the spray hood (201). A diversion strip (206) is fixed at the bottom of the collection hopper (205).

2. The purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation according to claim 1, characterized in that, The end of the infusion tube (202) away from the spray hood (201) is fixed to the circulation tube (105) and is connected to the circulation tube (105).

3. The purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation according to claim 1, characterized in that, The outer ring of the collection hopper (205) is movably connected to the tower body (101) through a sealed bearing, and the inner diameter of the collection hopper (205) is larger than the outer diameter of the bottom of the spray hood (201).

4. The purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation according to claim 1, characterized in that, The pressing member (207) includes a movable rod (210) movably connected to the center of the bottom of the spray hood (201), and a turbine (203) is fixed to the top of the movable rod (210).

5. A purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation according to claim 4, characterized in that, A sliding sleeve (213) is slidably connected to the movable rod (210). A protrusion (218) is fixed on one side of the sliding sleeve (213). A vertical rod (214) is fixed on the sliding sleeve (213). A pressure plate (215) is fixed at the bottom of the vertical rod (214).

6. A purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation according to claim 5, characterized in that, The bottom of the spray hood (201) is fixed with a first semi-arc plate (211), and a second semi-arc plate (216) is provided on the front side of the first semi-arc plate (211).

7. A purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation according to claim 6, characterized in that, The first semi-arc plate (211) and the second semi-arc plate (216) are both provided with arc grooves (219), and there are two arc grooves (219). A spiral groove (212) is provided between the two arc grooves (219).

8. A purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation according to claim 4, characterized in that, A connecting frame (217) is fixed on the movable rod (210), and one end of the connecting frame (217) is fixed inside the collection hopper (205).

9. A purified sulfuric acid absorption tower based on low-temperature decomposition and uniform acid separation according to claim 1, characterized in that, The top of the diversion strip (206) is provided with a diversion groove (208), and the end of the diversion strip (206) away from the collection hopper (205) is provided with a through groove (209).

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