Sulfur dioxide cooling gas washing device

Abstract

The utility model relates to a gas suction tower technical field, concretely is a kind of sulfur dioxide cooling gas washing device, its solution existing sulfur dioxide gas washing device only through spraying mode, lead to gas and liquid contact time is short, contact area is limited, further cause reaction is not sufficient, purification effect is not good technical problem, including tower body, the bottom of tower body is provided with inlet pipe, top is provided with exhaust pipe, the top inside tower body is equipped with the shower nozzle, water inlet pipe is installed on the tower body, water inlet pipe is communicated with the shower nozzle, the bottom of tower body is equipped with drain pipe, its characterized in that: the bottom of tower body is rotatably installed with mounting bracket by connecting shaft, mounting bracket is installed with the air-permeable member of having porous structure, the gas outlet end of inlet pipe is towards air-permeable member and gas can pass through air-permeable member, solution for washing gas can be attached on air-permeable member, gas entering by inlet pipe reacts with liquid on air-permeable member when passing through air-permeable member, and air-permeable member is driven to rotate by the rotation of mounting bracket.

Description

Technical Field

[0001] This utility model relates to the field of gas scrubbing tower technology, specifically a sulfur dioxide cooling and scrubbing device. Background Technology

[0002] In industrial production, gases containing sulfur dioxide need to be purified to reduce pollutant emissions. A common treatment method is to use a gas scrubbing device. By introducing the gas into the gas scrubbing tower, the liquid sprayed from the top spray system (such as sodium hydroxide solution) reacts chemically with the sulfur dioxide in the gas, thereby achieving desulfurization, cooling and dust removal.

[0003] Existing gas scrubbing devices typically rely on a spray structure at the top of the tower to spray liquid into the tower. For example, in the fiberglass sulfur dioxide scrubbing tower disclosed in CN207680297U, section

[0004] of the specification states that gas enters from the bottom of the tower and flows upward, reacting with the falling sprayed liquid. However, this method, which relies solely on spraying and natural convection of the gas, suffers from problems such as rapid gas flow within the tower, short contact time with the liquid, and limited contact area. This can easily lead to incomplete reactions, with some sulfur dioxide failing to be effectively absorbed, resulting in substandard emissions of purified gas and affecting the scrubbing effect and environmental compliance rate. Furthermore, the simple spraying method may further reduce the gas-liquid reaction efficiency due to uneven liquid distribution, making it difficult to meet the requirements of high-efficiency purification. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a sulfur dioxide cooling and scrubbing device, which solves the technical problem that existing sulfur dioxide scrubbing devices only use spraying, resulting in short gas-liquid contact time and limited contact area, leading to insufficient reaction and poor purification effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sulfur dioxide cooling and scrubbing device, comprising a tower body, an inlet pipe at the bottom of the tower body, an exhaust pipe at the top, a nozzle installed at the top inside the tower body, a water inlet pipe installed on the tower body, the water inlet pipe communicating with the nozzle, and a drain pipe at the bottom of the tower body. The device is characterized in that: a mounting frame is rotatably mounted at the bottom of the tower body via a connecting shaft; a permeable component with a porous structure is mounted on the mounting frame; the outlet end of the inlet pipe faces the permeable component, allowing gas to pass through it; a scrubbing solution can adhere to the permeable component; when gas enters through the inlet pipe and passes through the permeable component, it reacts with the liquid on the permeable component; and the rotation of the mounting frame drives the permeable component to rotate, causing different positions of the permeable component to sequentially contact and react with the gas discharged from the outlet end of the inlet pipe in a rotating manner.

[0006] Compared with the prior art, this utility model provides a sulfur dioxide cooling and scrubbing device, which has the following beneficial effects:

[0007] This sulfur dioxide cooling and scrubbing device, by setting a rotatable mounting frame and a porous venting component at the bottom of the tower body, and with the outlet end of the inlet pipe facing the venting component, allows the gas to directly contact the scrubbing liquid attached to the venting component when it passes through the porous venting component. The porous structure of the venting component increases the contact area, thereby achieving a preliminary and sufficient reaction of sulfur dioxide.

[0008] The mounting bracket drives the venting component to rotate, allowing different positions of the venting component to sequentially contact the gas discharged from the outlet end of the inlet pipe. This avoids the gas repeatedly reacting with only a fixed position on the venting component. Because the venting component rotates, the gas continuously contacts the liquid at different positions on the venting component. This ensures that the sulfur dioxide gas continuously and fully reacts with the liquid (high-concentration sodium hydroxide solution), thereby improving the absorption efficiency and purification effect of sulfur dioxide and enhancing the overall processing capacity of the gas scrubbing device. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0010] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0011] Figure 3 This is a three-dimensional structural diagram of the mounting bracket and nozzle installation of this utility model, wherein the venting component is installed in the mounting groove;

[0012] Figure 4 This is a three-dimensional structural diagram of the mounting bracket and nozzle installation of this utility model, wherein the venting component extends upward out of the mounting groove;

[0013] Figure 5 This is a three-dimensional structural diagram of the mounting bracket of this utility model, with the ventilated component installed in the mounting groove;

[0014] Figure 6 This is a three-dimensional structural diagram of the mounting bracket of this utility model; the ventilated component is not installed in the mounting groove.

[0015] Figure 7 This is a three-dimensional structural diagram of the installation of the external guide tube and the inner and outer guide tubes of this utility model;

[0016] Figure 8 This is a cross-sectional structural diagram showing the installation of the external guide tube and the inner and outer guide tubes of this utility model.

[0017] In the diagram: 1. Tower body; 2. Air inlet pipe; 3. Exhaust pipe; 4. Water inlet pipe; 5. Nozzle; 6. Drain pipe; 7. Mounting bracket; 8. Ventilation component; 9. Connecting shaft; 10. Mounting groove; 11. Base; 12. Drive motor; 13. Valve; 14. Nozzle; 15. Air guide vane; 16. Internal guide tube; 17. Connecting rod; 18. External guide tube; 19. Drain outlet; 20. Water inlet; 21. Water outlet. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1, please refer to Figure 1-2 A sulfur dioxide cooling and scrubbing device includes a tower body 1, which provides a closed reaction space for the purification of the gas. At the bottom of the tower body 1, an inlet pipe 2 is provided for introducing sulfur dioxide-containing gas, and the gas to be treated enters the interior of the tower body 1 through the inlet pipe 2; an exhaust pipe 3 is provided at the top of the tower body 1, and the purified gas is discharged from the tower body 1 through the exhaust pipe 3.

[0020] To achieve gas scrubbing, a water inlet pipe 4 is installed on the tower body 1 to deliver a scrubbing solution (usually sodium hydroxide solution, but other gases that can neutralize sulfur dioxide gas can also be used) into the tower body 1. At the same time, a nozzle 5 is installed at the top inside the tower body 1, and the nozzle 5 is connected to the water inlet pipe 4, so that the scrubbing solution delivered by the water inlet pipe 4 can be sprayed into the tower body 1 through the nozzle 5 to react with the gas inside the tower body 1.

[0021] In addition, a drain pipe 6 is provided at the bottom of the tower body 1 to discharge the waste liquid after reaction inside the tower body 1. A valve 13 is installed on the drain pipe 6, which can be operated to open and close the drain pipe 6. At the same time, valves 13 can also be installed on the air inlet pipe 2, the exhaust pipe 3, and the water inlet pipe 4 according to actual needs. The valve 13 on the air inlet pipe 2 can be used to regulate the flow rate and on / off state of the sulfur dioxide-containing gas entering the tower body 1. The valve 13 on the exhaust pipe 3 can control the discharge of the purified gas and the discharge rate. The valve 13 on the water inlet pipe 4 can regulate the flow rate and on / off state of the washing gas solution entering the tower body 1.

[0022] like Figure 2-6As shown, to ensure sufficient reaction between the gas and the scrubbing solution, a mounting bracket 7 is rotatably mounted at the bottom of the tower body 1 via a connecting shaft 9. The mounting bracket 7 allows gas to pass through. Specifically, the mounting bracket 7 is fixedly connected to the connecting shaft 9, and the connecting shaft 9 is rotatably connected to the tower body 1. A porous permeable element 8 is mounted on the mounting bracket 7. The outlet end of the inlet pipe 2 faces the permeable element 8, allowing the sulfur dioxide-containing gas entering from the inlet pipe 2 to pass through the permeable element 8; while the scrubbing solution sprayed from the nozzle 5 adheres to the permeable element 8 after falling. Figure 4 The arrow in the image indicates the direction in which the vent element 8 detaches upward from the mounting groove 10.

[0023] When the gas entering through the inlet pipe 2 passes through the venting element 8, it reacts with the liquid adhering to the venting element 8. Furthermore, since the mounting frame 7 is rotatably connected to the bottom of the tower body 1 via the connecting shaft 9, the rotation of the mounting frame 7 causes the venting element 8 to rotate as well. This allows different positions on the venting element 8 to sequentially contact and react with the gas discharged from the outlet of the inlet pipe 2, thereby improving the sufficiency of the gas-liquid reaction. To further explain, if the venting element 8 does not rotate, sulfur dioxide gas will continuously contact a certain position on the venting element 8, causing the concentration of the washing solution (such as sodium hydroxide solution) adhering to that position to gradually decrease, making it difficult to fully react with the sulfur dioxide in subsequent gases. However, when the venting element 8 rotates with the mounting frame 7, the gas can sequentially contact the unreacted solution on the venting element 8, thus ensuring the reaction effect.

[0024] The breathable component 8 can be made of various materials with porous structures, such as filter screens, felt, and filter paper. At the same time, it can also be formed by combining multiple layers, such as a multi-layered structure with an outer layer of filter screen, an inner layer of felt, and an innermost layer of filter paper, or a composite structure with filter screens on both sides and filler in the middle. By selecting appropriate materials or structures, it can be ensured that the breathable component 8 can both allow gas to pass through and effectively adhere to the washing solution.

[0025] To elaborate further, when the venting component 8 uses a filter screen, since its mesh size is usually large, when the washing solution adheres to the filter screen, the surface tension of the liquid can form a liquid surface at each mesh opening of the filter screen; when the gas is blown onto the filter screen, the liquid on the filter screen will break, forming several small solution particles during the breaking process, thereby increasing the contact area with the gas and allowing the gas to react fully with it.

[0026] When gas passes through breathable components 8 such as felt or filter paper, due to their small internal pore size, the gas can fully contact and react with the liquid adhering to the felt or filter paper during the passage process, further enhancing the reaction effect.

[0027] The air inlet pipe 2 is preferably provided with multiple air outlets, but it can also be provided with only one air outlet, which is set towards the venting element 8. The air outlet can take different forms: such as directly opening an opening in the air inlet pipe 2, installing a nozzle 14 at the air outlet, or connecting a spray pipe to the air inlet pipe 2. Regardless of whether it is an opening, a nozzle, or a spray pipe, its end must be aligned with the venting element 8. When a filter screen is used as the venting element 8, when gas is sprayed out from these air outlets and blown towards the filter screen, the liquid at the mesh of the filter screen will break apart under the action of the gas to form fine solution particles, thus fully reacting with the gas; when the gas passes through the felt or filter paper, due to its small internal pore size, it can fully contact and react with the liquid on the felt or filter paper.

[0028] The tower body 1 has a base 11 at the bottom, and a drive motor 12 is installed inside the base 11. The output shaft of the drive motor 12 is coaxially connected to the connecting shaft 9. The drive motor 12 can directly drive the connecting shaft 9 to rotate, thereby driving the mounting frame 7 and the ventilation component 8 to rotate synchronously.

[0029] Since the connecting shaft 9 passes through the bottom of the tower body 1, in order to prevent the liquid inside the tower body 1 from leaking from the connection position between the connecting shaft 9 and the tower body 1, a sealing device is used at this connection position for sealing. For example, a mechanical seal (such as a mechanical seal structure composed of a dynamic ring and a stationary ring) or a sealing ring (such as a combination structure of an O-ring rubber sealing ring and a retaining ring) can be selected to ensure the sealing performance of the tower body 1.

[0030] like Figure 5-6 As shown, several air guide vanes 15 are evenly distributed along the circumference of the mounting frame 7, and each air guide vane 15 is installed at an angle in the same direction. When gas is discharged from the outlet end of the air inlet pipe 2, the airflow flows through the air guide vanes 15, and the angled air guide vanes 15 are subjected to the force of the airflow, thereby driving the mounting frame 7 and the ventilator 8 installed on it to rotate together. This method of directly driving the air guide vanes 15 to rotate the mounting frame 7 and the ventilator 8 through airflow does not require external power or motors or other driving devices, which can reduce energy consumption and improve economy while ensuring the dynamic response effect of the ventilator 8.

[0031] The driving method of the mounting bracket 7 can be flexibly selected according to actual usage needs: when the mounting bracket 7 needs to rotate slowly, there is no need to turn on the drive motor 12. The gas discharged from the air outlet of the air inlet pipe 2 acts on the air guide vane 15, which can drive the mounting bracket 7 and the ventilator 8 to rotate slowly; when the mounting bracket 7 needs to rotate at high speed, the drive motor 12 can be turned on, and the motor will drive the mounting bracket 7 and the ventilator 8 to rotate at high speed, thereby adapting to the requirements of gas and liquid reaction efficiency in different scenarios.

[0032] The mounting bracket 7 has a mounting slot 10 for installing the ventilator 8, and the top of the mounting slot 10 is open. When installing the ventilator 8, the ventilator 8 can be placed into the mounting slot 10 through the opening at the top of the mounting slot 10 to complete the installation; when it is necessary to remove the ventilator 8 for replacement or cleaning, the ventilator 8 can also be taken out upward from the opening at the top of the mounting slot 10. The operation is simple and convenient for the maintenance of the ventilator 8.

[0033] The mounting bracket 7 has a mounting groove 10 for mounting the ventilator 8, and the top of the mounting groove 10 is open.

[0034] like Figure 7-8 As shown, an inner guide tube 16 and an outer guide tube 18 are provided inside the tower body 1 and above the mounting frame 7. The outer guide tube 18 surrounds the outer guide tube 16, and a drain port 19 is formed in the gap between the bottom of the outer guide tube 18 and the inner guide tube 16. The drain port 19 is vertically aligned with the opening at the top of the mounting groove 10. When the outer guide tube 18 and the inner guide tube 16 are used together, the amount of solution collected from the nozzle 5 can be increased: the two together can collect the solution sprayed from the nozzle 5, allowing more liquid to be retained. When the solution falls, most of the liquid will accumulate in the space between the outer wall of the outer guide tube 18 and the inner wall of the tower body 1, and between the outer wall of the outer guide tube 18 and the inner wall of the inner guide tube 16. Then the liquid is discharged from the drain port 19 and flows into the mounting groove 10 through the opening at the top of the mounting groove 10, and further seeps into the venting element 8, so that sufficient liquid adheres to the venting element 8, thereby fully reacting with the gas.

[0035] The installation and connection method of the external guide tube 18 is such that its outer wall is fixedly connected to the inner wall of the tower body 1, thereby achieving a stable installation of the external guide tube 18 inside the tower body 1; the outer wall of the internal guide tube 16 is fixedly connected to the interior of the tower body 1 through the connecting rod 17, thereby ensuring the stable setting of the internal guide tube 16 inside the tower body 1. The top of the external guide tube 18 is flared, and the bottom is constricted.

[0036] The inner guide tube 16 is hollow in the middle, with an inlet 20 at the top and an outlet 21 at the bottom. The top of the inner guide tube 16 is constricted (the diameter gradually decreases from bottom to top), and its outer wall can guide the liquid flowing down from the nozzle 5.

[0037] Specifically, some of the liquid sprayed from nozzle 5 can directly enter the central cavity through the inlet 20 at the top of the internal guide tube 16 and flow downwards through the outlet 21 at the bottom, thus preserving the original spraying reaction effect in the central area. Simultaneously, because the top of the internal guide tube 16 is constricted, it can guide a large amount of liquid to flow into the space between its outer wall and the external guide tube 18, increasing the liquid accumulation in this area. When the gas flows upwards to a position higher than the internal guide tube 16, the liquid sprayed from nozzle 5 at the top of the tower body 1 can further scrub the gas, achieving multi-level purification treatment.

[0038] In summary, in use, the sulfur dioxide cooling and scrubbing device introduces sulfur dioxide-containing gas into the tower body 1 through the inlet pipe 2 and sprays it out towards the venting element 8. When the gas passes through the porous venting element 8, it undergoes a preliminary reaction with the scrubbing solution (such as sodium hydroxide solution) attached to the venting element 8. The mounting frame 7 drives the venting element 8 to rotate, so that the gas can fully contact the solution at different positions of the venting element 8.

[0039] The solution sprayed from nozzle 5 is collected by the external guide tube 18 and the internal guide tube 16, flows into the installation tank 10 and wets the venting component 8. Excess solution is discharged through the drain pipe 6. When the gas flows upward to the top of the internal guide tube 16, it is washed again by the solution sprayed from the top, and finally the purified gas is discharged from the exhaust pipe 3.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sulfur dioxide cooling and scrubbing device, comprising a tower body (1), wherein an air inlet pipe (2) is provided at the bottom of the tower body (1), an exhaust pipe (3) is provided at the top, a nozzle (5) is installed at the top inside the tower body (1), a water inlet pipe (4) is installed on the tower body (1), the water inlet pipe (4) is connected to the nozzle (5), and a drain pipe (6) is provided at the bottom of the tower body (1), characterized in that: The bottom of the tower body (1) is rotatably mounted with a mounting frame (7) via a connecting shaft (9). A permeable element (8) with a porous structure is mounted on the mounting frame (7). The outlet end of the inlet pipe (2) faces the permeable element (8) and the gas can pass through the permeable element (8). The solution used for gas washing can adhere to the permeable element (8). When the gas entering through the inlet pipe (2) passes through the permeable element (8), it reacts with the liquid on the permeable element (8). The rotation of the mounting frame (7) drives the permeable element (8) to rotate, so that different positions of the permeable element (8) come into contact with the gas discharged from the outlet end of the inlet pipe (2) in a rotating manner.

2. The sulfur dioxide cooling and scrubbing device according to claim 1, characterized in that: The air inlet pipe (2) is provided with multiple air outlets, and a nozzle (14) is installed on the air outlet of the air inlet pipe (2), with the nozzle (14) facing the air vent (8).

3. The sulfur dioxide cooling and scrubbing device according to claim 2, characterized in that: The mounting frame (7) is provided with a number of air guide blades (15) along its circumference. Each air guide blade (15) is installed at an inclination in the same direction. When the gas discharged from the outlet end of the air inlet pipe (2) flows through the air guide blades (15), the air guide blades (15) are driven by the airflow force to rotate the mounting frame (7) and the air vent (8).

4. The sulfur dioxide cooling and scrubbing device according to claim 3, characterized in that: The tower body (1) has a base (11) at its bottom and a drive motor (12) installed at its bottom. The drive motor (12) is installed inside the base (11). The output shaft of the drive motor (12) is coaxially connected to the connecting shaft (9). The connecting shaft (9) is fixedly connected to the mounting bracket (7).

5. A sulfur dioxide cooling and scrubbing device according to any one of claims 1-3, characterized in that: The mounting bracket (7) has a mounting groove (10) for mounting the ventilator (8), and the top of the mounting groove (10) is open.

6. The sulfur dioxide cooling and scrubbing device according to claim 5, characterized in that: An inner guide tube (16) and an outer guide tube (18) are provided inside the tower body (1) and above the mounting frame (7). The outer guide tube (18) surrounds the outside of the inner guide tube (16). The gap between the bottom of the outer guide tube (18) and the inner guide tube (16) forms a drain outlet (19). The drain outlet (19) is aligned vertically with the opening at the top of the mounting groove (10).

7. The sulfur dioxide cooling and scrubbing device according to claim 6, characterized in that: The outer wall of the external guide tube (18) is fixedly connected to the inner wall of the tower body (1), and the outer wall of the internal guide tube (16) is fixedly connected to the interior of the tower body (1) through a connecting rod (17).

8. The sulfur dioxide cooling and scrubbing device according to claim 7, characterized in that: The inner guide tube (16) is hollow in the middle, with an inlet (20) at the top and an outlet (21) at the bottom. The top of the inner guide tube (16) is constricted. The diameter of the top of the inner guide tube (16) gradually decreases from bottom to top. The outer wall of the inner guide tube (16) is used to guide the liquid flowing down from the nozzle (5).

9. A sulfur dioxide cooling and scrubbing device according to claim 8, characterized in that: The top of the external guide tube (18) is flared and the bottom is constricted.

10. A sulfur dioxide cooling and scrubbing device according to claim 1 or 9, characterized in that: A valve (13) is installed on the drain pipe (6).

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