Waste gas treatment device

Abstract

The utility model belongs to the technical field of waste gas treatment, and particularly relates to a waste gas treatment device which comprises a base, a spraying barrel, a liquid storage tank, a water pump, a spraying pipe, a nozzle, an extension barrel, a transparent observation glass plate and a water mist removing structure. Waste gas enters the spraying barrel through the gas inlet and is absorbed and neutralized by water mist, hydrogen chloride is dissolved in water, and sulfur trioxide reacts with water to generate sulfuric acid; a transparent observation glass plate is arranged in an extending cylinder on the front side of the spraying cylinder, so that an operator can observe the internal treatment condition, and in order to prevent water mist from being attached to the glass plate and affecting observation, the device removes water mist in real time in the waste gas treatment process through a water collecting disc, a rotating shaft, a sleeve, a scraping strip and other parts, and it is ensured that the surface of the transparent observation glass plate is kept clean.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, and specifically relates to a waste gas treatment device. Background Technology

[0002] Waste gas treatment technology is widely used in chemical, metallurgical, pharmaceutical, and fine chemical industries to effectively remove harmful gaseous components generated during industrial production and meet environmental protection requirements. Especially in organic synthesis and inorganic chemical production, condensation reactions often produce highly reactive gases such as hydrogen chloride (HCl) and sulfur trioxide (SO3). Direct emission of these harmful gases not only pollutes the environment but also adversely affects the health and safety of operators. Therefore, developing waste gas treatment devices capable of effectively treating these harmful gases has become a key focus of the industry.

[0003] Existing waste gas treatment devices typically employ spray scrubbing, where waste gas is transported to the spray tank by an exhaust fan. Water mist is then sprayed onto the gas to absorb and neutralize hydrogen chloride and sulfur trioxide. Hydrogen chloride is water-soluble and removed, while sulfur trioxide reacts with water to form sulfuric acid, thus purifying the main harmful components in the waste gas. This technology is relatively mature in its basic principles. By continuously supplying water to the spray tank and using nozzles to create water mist, it effectively improves gas-liquid contact efficiency and enhances the waste gas treatment effect.

[0004] However, in practical applications, when the exhaust gas comes into full contact with the water mist inside the spray cylinder, a large amount of water mist will diffuse inside the cylinder and adhere to the inner wall of the observation window (such as a transparent observation glass plate). This will affect the external operator's observation of the internal processing process and equipment condition, reducing the clarity and accuracy of the observation. At the same time, traditional devices often require shutdown maintenance or additional auxiliary equipment to clean the water mist adhering to the inner wall of the observation window, resulting in discontinuous processing, increased maintenance costs, and operational inconvenience.

[0005] Therefore, the technical problem in the existing technology is that there is a lack of an exhaust gas treatment device that can instantly clean the water mist adhering to the inner wall of the transparent observation window during equipment operation, so as to ensure that operators can intuitively and clearly observe the internal processing status at any time while the equipment is running normally. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide a waste gas treatment device that can remove water mist from the inner wall of the observation window under normal operating conditions.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A waste gas treatment device includes a base and a spraying mechanism. A spraying cylinder is vertically arranged on the upper surface of the base. The spraying cylinder is hollow inside. An exhaust port is opened at the top of the spraying cylinder, and an air inlet is opened at the lower side of one side of the spraying cylinder. A packing mesh is evenly laid inside the base, and multiple packing meshes are stacked one above the other. The spraying mechanism includes a liquid storage tank fixed on one side of the base. The liquid storage tank is placed on the side of the spraying cylinder away from the air inlet.

[0009] The front surface of the spray cylinder is uniformly provided with extension cylinders, which are connected to the interior of the spray cylinder. A transparent observation glass plate is fixed inside the extension cylinder. A water collection tray is provided at the top of the extension cylinder. The water collection tray is placed inside the spray cylinder and its top is open. A support frame is provided inside the extension cylinder. A rotating shaft is rotatably passed through the center of the support frame. The axis of the rotating shaft coincides with the center of the extension cylinder.

[0010] Furthermore, an impeller is provided at one end of the rotating shaft near the center of the spray cylinder, and a water leakage hole is provided on the lower surface of the water collection plate, with the water leakage hole eccentrically positioned above the impeller.

[0011] Furthermore, the rotating shaft has symmetrically formed raised strips on its surface, and a sleeve is slidably installed at the end of the rotating shaft away from the impeller. The inner wall of the sleeve has a groove corresponding to the raised strips, and a scraper is transversely arranged at the end of the sleeve away from the impeller. The scraper is in contact with the inner wall of the transparent observation glass plate.

[0012] Furthermore, a spring is sleeved on the surface of the rotating shaft, with one end of the spring in contact with the surface of the support frame and the other end of the spring in contact with the surface of the sleeve.

[0013] Furthermore, the liquid storage tank is connected to the lower part of the spray cylinder, and a liquid level gauge is installed on one side of the liquid storage tank for monitoring the liquid level inside the liquid storage tank.

[0014] Furthermore, a water pump is provided on one side of the liquid storage tank. The input end of the water pump is located inside the liquid storage tank, and a spray pipe is provided at the output end of the water pump. Spray nozzles are evenly arranged on the surface of the spray pipe. When multiple spray nozzles are placed inside the spray cylinder, the spray nozzles are positioned above the packing mesh.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By creating a water mist inside the spray cylinder to absorb and neutralize waste gas containing hydrogen chloride and sulfur trioxide, the hydrogen chloride dissolves in water and the sulfur trioxide is converted into sulfuric acid, thereby effectively reducing the content of harmful gases in the waste gas and improving treatment efficiency. Compared with traditional technologies that rely solely on water mist treatment, this technology fully utilizes the synergistic effect of the fine water mist generated by the water pump, spray pipes, and nozzles, along with the stacked packing mesh, to increase the gas-liquid contact area, further enhancing the purification effect and ensuring the continuous and stable operation of the waste gas treatment process.

[0017] By incorporating an extension tube and a transparent observation glass plate, the internal processing status of the equipment can be directly observed during operation. However, traditional exhaust gas treatment devices often generate a large amount of water mist that adheres to the inner wall of the observation window during operation, reducing the clarity of the observation process and requiring shutdown for cleaning. In contrast, this technical solution utilizes the coordinated operation of a water collection tray, a rotating shaft, a sleeve, and scrapers. During the water mist spraying process, a certain amount of water is eccentrically guided into the impeller through a drainage hole, guiding the impeller and rotating shaft to rotate. The rotation of the shaft drives the sleeve and scrapers to continuously scrape away water mist from the inner wall of the transparent observation glass plate, making it difficult for water mist to adhere to the observation surface for a long time. This ensures clear observation during normal operation of the equipment without the need for additional shutdown maintenance or auxiliary equipment.

[0018] By incorporating a spring on the outside of the rotating shaft, a stable elastic contact is ensured when the scraper blade contacts the transparent observation glass, resulting in more consistent and reliable scraping efficiency and effect. Furthermore, the introduction of a liquid storage tank and level gauge ensures a suitable water supply in real time, maintaining the water mist inside the spray cylinder at an ideal level. This not only helps to continuously absorb and neutralize waste gas components but also provides a stable power source for the impeller. This continuous and automated water mist removal solution for the observation surface not only improves upon the inconvenience of observation and maintenance downtime issues inherent in traditional technologies but also provides a clear visual environment in real time during operation, enhancing the convenience and safety of equipment operation and monitoring. Attached Figure Description

[0019] Figure 1 This is a frontal perspective view of the present invention.

[0020] Figure 2 This is a schematic diagram of the installation structure of the spray structure of this utility model;

[0021] Figure 3 For the present utility model Figure 2 A schematic diagram of the cross-sectional structure;

[0022] Figure 4 For the present utility model Figure 2 A top view of the transverse cross-section of the structure;

[0023] Figure 5This is a schematic diagram of the internal structure of the extension tube of this utility model;

[0024] Figure 6 This is a schematic diagram of the scraper installation structure of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Base; 2. Spray tube; 21. Exhaust port; 22. Air inlet; 23. Extension tube; 231. Support frame; 232. Water collection tray; 233. Drain hole; 24. Transparent observation glass plate; 3. Packing mesh; 4. Spraying mechanism; 41. Liquid storage tank; 42. Liquid level gauge; 43. Water pump; 44. Spray pipe; 45. Spray head; 6. Rotating shaft; 61. Raised strip; 62. Impeller; 7. Sleeve; 71. Scraper; 8. Spring. Detailed Implementation

[0027] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0028] refer to Figures 1-5 As shown, a waste gas treatment device includes a base 1 and a spraying mechanism 4. A spraying cylinder 2 is vertically arranged on the upper surface of the base 1. The spraying cylinder 2 is hollow inside. An exhaust port 21 is opened at the top of the spraying cylinder 2. An air inlet 22 is opened at the lower side of one side of the spraying cylinder 2. A packing mesh 3 is evenly laid inside the base 1. Multiple packing meshes 3 are stacked one on top of the other. The spraying mechanism 4 includes a liquid storage tank 41 fixed on one side above the base 1. The liquid storage tank 41 is placed on the side of the spraying cylinder 2 away from the air inlet 22.

[0029] The waste gas treatment device transports the waste gas containing hydrogen chloride and sulfur trioxide generated by the condensation reaction to the inside of the spray cylinder 2 via an exhaust fan and introduces it through the air inlet 22. Pure water in the storage tank 41 is sprayed into the inside of the spray cylinder 2 through the water pump 43, spray pipe 44 and nozzle 45 to form water mist, thereby dissolving hydrogen chloride in water and reacting sulfur trioxide with water to generate sulfuric acid. The packing mesh 3 is stacked to increase the gas-liquid contact area to improve the treatment efficiency. The base 1 serves as a support structure to ensure the stable operation of the entire device.

[0030] refer to Figure 4 and Figure 5As shown, extension tubes 23 are evenly arranged on the front surface of the spray tube 2. The extension tubes 23 are connected to the interior of the spray tube 2. A transparent observation glass plate 24 is fixed inside the extension tube 23. A water collection plate 232 is provided on the top of the extension tube 23. The water collection plate 232 is placed inside the spray tube 2 and its top is open. A support frame 231 is provided inside the extension tube 23. A rotating shaft 6 is rotatably passed through the center of the support frame 231. The axis of the rotating shaft 6 coincides with the center of the extension tube 23.

[0031] The extension tube 23 on the front surface of the spray tube 2 provides the operator with visualization of the internal working conditions through the internally fixed transparent observation glass plate 24. The support frame 231 is centrally rotated and installed through the shaft 6 to enable the shaft 6 to rotate smoothly. The water collection tray 232 is located inside the spray tube 2 and can collect the flowing water during the water mist spraying process, thereby providing an energy source for the rotation of the impeller 62. The cooperation between the extension tube 23 and the support frame 231 ensures the reliability of the observation area structure, thereby enabling continuous and clear observation of the internal state during normal exhaust gas treatment.

[0032] refer to Figure 5 and Figure 6 As shown, an impeller 62 is provided at one end of the rotating shaft 6 near the center of the spray cylinder 2, and a water leakage hole 233 is provided on the lower surface of the water collection plate 232. The water leakage hole 233 is eccentrically positioned above the impeller 62.

[0033] The impeller 62 installed at one end of the rotating shaft 6 is rotated by the impact of water flow introduced from the eccentric position of the water leakage hole 233 on the lower surface of the water collection plate 232. This flow direction and eccentric distribution ensure that the water continuously applies power to the surface of the impeller 62 during the exhaust gas treatment. The rotating shaft 6 rotates accordingly to drive the subsequent structure to remove water mist from the surface of the transparent observation glass plate 24, thereby maintaining a good visual environment while hydrogen chloride and sulfur trioxide are fully absorbed and converted into sulfuric acid during the exhaust gas treatment process.

[0034] refer to Figure 6 As shown, the rotating shaft 6 has symmetrically provided protrusions 61 on its surface. A sleeve 7 is slidably installed on the end of the rotating shaft 6 away from the impeller 62. The inner wall of the sleeve 7 has a groove corresponding to the protrusions 61. A scraper 71 is provided laterally on the end of the sleeve 7 away from the impeller 62. The scraper 71 is in contact with the inner wall of the transparent observation glass plate 24.

[0035] The protrusions 61 on the surface of the rotating shaft 6 correspond to the grooves on the inner wall of the sleeve 7 to achieve a stable transmission connection, so that the rotating shaft 6 rotates and drives the sleeve 7 to rotate synchronously. The scraper 71, which is set laterally at the end of the sleeve 7, is in close contact with the inner wall of the transparent observation glass plate 24 and continuously scrapes off the attached water mist during the rotation. This structure avoids the problem of water mist interfering with the observation in traditional devices during exhaust gas purification and achieves uninterrupted clear observation during equipment operation.

[0036] refer to Figure 6As shown, a spring 8 is sleeved on the surface of the rotating shaft 6. One end of the spring 8 is in contact with the surface of the support frame 231, and the other end of the spring 8 is in contact with the surface of the sleeve 7.

[0037] The spring 8, which is sleeved on the surface of the rotating shaft 6, presses against the surface of the support frame 231 at one end and against the surface of the sleeve 7 at the other end, so that it always provides elastic thrust to the sleeve 7 in the direction of the transparent observation glass plate 24 during the rotation of the rotating shaft 6. The scraper 71 can thus maintain a tight fit against the inner wall of the transparent observation glass plate 24 to achieve efficient water mist removal. This structure can still maintain reliable performance in acidic media environment.

[0038] refer to Figure 1 and Figure 2 As shown, the liquid storage tank 41 is connected to the lower part of the spray cylinder 2. A liquid level gauge 42 is installed on one side of the liquid storage tank 41. The liquid level gauge 42 is used to monitor the liquid level inside the liquid storage tank 41.

[0039] The liquid level in the storage tank 41 is monitored by the liquid level gauge 42 to ensure that there is enough water in the storage tank 41 so that the water pump 43 can continuously deliver enough water into the spray cylinder 2 to maintain the long-term stable reaction conditions for hydrogen chloride dissolution and sulfur trioxide conversion to sulfuric acid in the waste gas treatment.

[0040] refer to Figures 1-3 As shown, a water pump 43 is provided on one side of the liquid storage tank 41. The input end of the water pump 43 is located inside the liquid storage tank 41, and a spray pipe 44 is provided at the output end of the water pump 43. Spray nozzles 45 are evenly arranged on the surface of the spray pipe 44. When multiple spray nozzles 45 are all located inside the spray cylinder 2, the spray nozzles 45 are positioned above the packing mesh 3.

[0041] The water in the storage tank 41 is drawn by the water pump 43 and then forms a fine water mist above the packing mesh 3 through the spray pipe 44 and the nozzle 45. This mist directly contacts the waste gas containing hydrogen chloride and sulfur trioxide flowing through the spray cylinder 2, causing the hydrogen chloride to dissolve rapidly and the sulfur trioxide to generate sulfuric acid, thus improving the waste gas purification efficiency. Under the synergistic effect of the above structures, the waste gas treatment device achieves full gas-liquid mixing, continuous cleaning observation, and long-term stable operation.

[0042] The working principle of this utility model is as follows: The waste gas containing hydrogen chloride gas and sulfur trioxide generated by the condensation reaction is transported to the air inlet 22 by the exhaust fan. At this time, the waste gas enters the spray cylinder 2 and is discharged upward through the exhaust port 21. The liquid storage tank 41 is filled with pure water. Then, the pure water in the liquid storage tank 41 is drawn out by the water pump 43 and transported to the spray cylinder 2 through the spray pipe 44. It is sprayed downward through the nozzle 45. At this time, the hydrogen chloride gas in the waste gas dissolves in the water, and the sulfur trioxide also reacts with the water to produce sulfuric acid, so as to achieve effective treatment of the waste gas. During this process, the inside of the spray cylinder 2 is filled with water mist containing waste gas. This water mist will adhere to the inside of the transparent observation glass plate 24, affecting the observation.

[0043] Water is sprayed downwards through nozzle 45, and some of the water is collected by water collection tray 232 and flows downwards through water leakage hole 233, which impacts one side of the impeller 62 blades, causing the rotating shaft 6 to rotate, which in turn drives the sleeve 7 to rotate. Due to the thrust of spring 8, one side of the scraper 71 is tightly attached to the inner wall of the transparent observation glass plate 24, thereby scraping away the water mist adhering to the inner wall of the transparent observation glass plate 24 to ensure the external observation effect.

[0044] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A waste gas treatment device, comprising a base (1) and a spraying mechanism (4), characterized in that: A spray cylinder (2) is vertically arranged on the upper surface of the base (1). The spray cylinder (2) is hollow inside. An exhaust port (21) is opened at the top of the spray cylinder (2). An air inlet (22) is opened at the bottom of one side of the spray cylinder (2). A packing mesh (3) is evenly laid inside the base (1). Multiple packing meshes (3) are stacked one on top of the other. The spraying mechanism (4) includes a liquid storage tank (41) fixed on one side above the base (1). The liquid storage tank (41) is placed on the side of the spray cylinder (2) away from the air inlet (22). The front surface of the spray cylinder (2) is uniformly provided with extension cylinders (23), the extension cylinders (23) are connected to the interior of the spray cylinder (2), a transparent observation glass plate (24) is fixed inside the extension cylinder (23), a water collection plate (232) is provided at the top of the extension cylinder (23), the water collection plate (232) is placed inside the spray cylinder (2) and the top is open, a support frame (231) is provided inside the extension cylinder (23), a rotating shaft (6) is rotatably passed through the center of the support frame (231), and the axis of the rotating shaft (6) coincides with the center of the extension cylinder (23).

2. The waste gas treatment device according to claim 1, characterized in that: An impeller (62) is provided at one end of the rotating shaft (6) near the center of the spray cylinder (2), and a water leakage hole (233) is provided on the lower surface of the water collection plate (232), with the water leakage hole (233) eccentrically positioned above the impeller (62).

3. The waste gas treatment device according to claim 2, characterized in that: The rotating shaft (6) has symmetrically arranged protrusions (61) on its surface. A sleeve (7) is slidably installed on the end of the rotating shaft (6) away from the impeller (62). The inner wall of the sleeve (7) has a groove corresponding to the protrusions (61). A scraper (71) is arranged laterally on the end of the sleeve (7) away from the impeller (62). The scraper (71) is in contact with the inner wall of the transparent observation glass plate (24).

4. The waste gas treatment device according to claim 3, characterized in that: A spring (8) is sleeved on the surface of the rotating shaft (6). One end of the spring (8) is in contact with the surface of the support frame (231), and the other end of the spring (8) is in contact with the surface of the sleeve (7).

5. The waste gas treatment device according to claim 1, characterized in that: The liquid storage tank (41) is connected to the lower part of the spray cylinder (2). A liquid level gauge (42) is provided on one side of the liquid storage tank (41) for monitoring the liquid level inside the liquid storage tank (41).

6. The waste gas treatment device according to claim 5, characterized in that: A water pump (43) is provided on one side of the liquid storage tank (41). The input end of the water pump (43) is placed inside the liquid storage tank (41), and a spray pipe (44) is provided at the output end of the water pump (43). Spray nozzles (45) are evenly arranged on the surface of the spray pipe (44). When multiple spray nozzles (45) are placed inside the spray cylinder (2), the spray nozzles (45) are placed above the packing mesh (3).

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