Packed tower for separating acid mist at gas phase outlet of sulfuric acid absorption tower

Abstract

The utility model discloses a packed tower for separating acid mist at a gas phase outlet of a sulfuric acid absorption tower, and relates to the technical field of packed towers. Comprising a base, a packed tower arranged at the top end of the base, and a rotary filtering assembly arranged on the inner wall of a filtering barrel and used for separating and purifying acid mist. The situation that the purification liquid is locally excessive or insufficient is avoided, it is ensured that gas and liquid make full contact in the whole filler layer, meanwhile, the stirring rods synchronously rotate along with the spraying device to stir filler, full contact of the acid gas, the filler and the purification liquid is further promoted, the purification liquid better flows in gaps of the filler, and the purification effect is improved. The contact between the acidic gas and the purification liquid is more frequent, so that acidic substances in the acid mist are more effectively removed, the discharged gas is ensured to be purer, and the environmental protection requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of packed tower technology, specifically a packed tower for separating acid mist from the gas phase outlet of a sulfuric acid absorption tower. Background Technology

[0002] Packed towers, also known as packed columns, are a type of mass transfer equipment commonly used in chemical production. They mainly consist of a cylindrical tower body and packing material (solid materials of various shapes used to increase the surface area between two fluid phases and enhance mass transfer). Used for absorption, distillation, extraction, etc., packed towers use the packing material as the basic component for gas-liquid contact and mass transfer. The liquid flows downwards in a film-like manner on the packing surface, while the gas flows upwards in a continuous phase, interacting with the liquid in a progressive manner, thus facilitating mass and heat transfer between the gas and liquid phases. The component concentrations and temperatures of both phases change continuously along the height of the tower.

[0003] However, in the case of separating acid mist at the gas phase outlet of the sulfuric acid absorption tower, the nozzles of the existing equipment cannot rotate to spray, resulting in uneven distribution of the absorbent liquid. This makes it impossible to form a uniform liquid film on the packing surface, thereby reducing the effective contact area between the gas and liquid phases and lowering the absorption efficiency of the acid mist. Furthermore, if the packing layer cannot be stirred during the absorption of sulfuric acid, the liquid flow within the packing layer will become slow, which can easily lead to excessively thick local liquid films, liquid accumulation, or solid particles and crystals. This hinders the mass transfer process between the acid mist and the absorbent liquid, causing the packing layer to become clogged and affecting the mass transfer performance of the entire packed tower. Utility Model Content

[0004] The purpose of this invention is to provide a packed tower for separating acid mist from the gas phase outlet of a sulfuric acid absorption tower, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a packed tower for separating acid mist from the gas phase outlet of a sulfuric acid absorption tower, comprising a base and a packed tower disposed at the top of the base.

[0006] Rotate the filter assembly, which is located on the inner wall of the filter barrel, to separate and purify acid mist;

[0007] The rotating filter assembly includes a protective box, which is located at the top of the packed tower. A motor is installed at the top of the protective box, and the motor output end passes through the top of the inner wall of the protective box and is fixedly connected to a rotating shaft. The bottom end of the rotating shaft is rotatably connected to the top of the packed tower. A first gear is fixedly connected to the outer wall of the rotating shaft, meshing with a second gear. A water delivery rod is fixedly connected to the center hole of the second gear. A water inlet pipe is connected to the top of the inner wall of the water delivery rod. The bottom end of the water delivery rod passes through the top of the inner wall of the packed tower and is fixedly connected to a spray plate. A stirring rod is fixedly connected to the center point of the bottom end of the spray plate. A fixing plate is rotatably connected to the bottom end of the stirring rod.

[0008] As a specific embodiment of the technical solution of this application, the outer wall of the fixing plate is fixedly connected to the inner wall of the packed tower, and a water leakage hole is provided at the top of the fixing plate.

[0009] As a specific embodiment of the technical solution of this application, the space between the top of the fixed plate and the top of the inner wall of the packed tower is set as a packing chamber, and the space between the bottom of the fixed plate and the bottom of the inner wall of the packed tower is set as a liquid storage chamber.

[0010] As a specific embodiment of the technical solution of this application, the bottom of the inner wall of the liquid storage tank is opened at an oblique angle, and an air inlet is provided on the inner wall of the liquid storage tank. An air inlet pipe is fixedly connected to the inner wall of the air inlet.

[0011] As a specific embodiment of the technical solution of this application, a water outlet is provided on the inner wall of the liquid storage tank, and a water outlet is fixedly connected to the inner wall of the water outlet.

[0012] As a specific embodiment of the technical solution of this application, a gas filter is provided at the top of the inner wall of the packed tower, and an outlet pipe is provided at the top of the packed tower.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This is a packed tower for separating acid mist from the gas phase outlet of a sulfuric acid absorption tower. Through the synergistic effect of rotating the spraying purification liquid and stirring the packing, the purification liquid is evenly sprayed onto the packing, avoiding localized over- or under-dispensing of the purification liquid. This ensures full contact between the gas and liquid throughout the entire packing layer, allowing the purification liquid to better remove acidic components from the gas. Simultaneously, the stirring rod rotates synchronously with the spraying device, stirring the packing and further promoting full contact between the acidic gas, packing, and purification liquid. This allows the purification liquid to flow better within the packing gaps, increasing the frequency of contact between the acidic gas and the purification liquid, thus more effectively removing acidic substances from the acid mist and ensuring purer exhaust gas that meets environmental protection requirements. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the rotating filter assembly of this utility model;

[0017] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of the rotating filter assembly A;

[0018] Figure 4 This is a cross-sectional schematic diagram of the rotating filter assembly of this utility model.

[0019] In the diagram: 1. Base; 2. Packed tower; 3. Rotating filter assembly; 301. Air inlet; 302. Air outlet; 303. Water outlet; 304. Water inlet pipe; 305. Motor; 306. Water delivery rod; 307. Rotating shaft; 308. First gear; 309. Second gear; 310. Gas filter; 311. Spraying disc; 312. Fixing plate; 313. Liquid storage tank; 314. Packed tank. Detailed Implementation

[0020] 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.

[0021] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0024] like Figures 1-4 As shown, it includes a base 1 and a packed tower 2 set at the top of the base 1. A rotating filter assembly 3 is set on the inner wall of the packed tower 2 to reduce packing blockage and make the gas-liquid flow smoother for separating and purifying acid mist.

[0025] like Figures 1-4As shown, in order to reduce packing blockage and facilitate smoother gas-liquid flow for acid mist separation and purification, a rotating filter assembly 3 is installed on the inner wall of the base 1. Specifically, the rotating filter assembly 3 includes a protective box, which is located at the top of the packed tower 2. A motor 305 is installed at the top of the protective box. The output end of the motor 305 passes through the top of the inner wall of the protective box and is fixedly connected to a rotating shaft 307. The bottom end of the rotating shaft 307 is rotatably connected to the top of the packed tower 2. A first gear 308 is fixedly connected to the outer wall of the rotating shaft 307, meshing with a second gear 309. A water delivery rod 306 is fixedly connected to the center hole of the second gear 309. A water inlet pipe 304 is connected to the top of the inner wall of the water delivery rod 306. The bottom end of the water delivery rod 306 passes through the top of the inner wall of the packed tower 2 and is fixedly connected to... A spray plate 311 is provided, with a stirring rod fixedly connected to the center point of its bottom end. A fixing plate 312 is rotatably connected to the bottom end of the stirring rod. The outer wall of the fixing plate 312 is fixedly connected to the inner wall of the packed tower 2. A water leakage hole is provided at the top of the fixing plate 312. The space between the top of the fixing plate 312 and the top of the inner wall of the packed tower 2 is designated as a packing chamber 314. The space between the bottom end of the fixing plate 312 and the bottom end of the inner wall of the packed tower 2 is designated as a liquid storage chamber 313. The bottom of the inner wall of the liquid storage chamber 313 is angled at 35 degrees. An air inlet is provided on the inner wall of the liquid storage chamber 313, with an air inlet pipe 301 fixedly connected to its inner wall. A water outlet is provided on the inner wall of the liquid storage chamber 313, with a water outlet pipe 303 fixedly connected to its inner wall. A gas filter 310 is provided at the top of the inner wall of the packed tower 2. The top of the packed tower 2 is equipped with an outlet pipe 302. It should also be noted that in this embodiment, the motor 305 serves as the power source for the rotating filter assembly 3. The output end of the motor 305 penetrates the top of the inner wall of the protective box and is fixedly connected to a rotating shaft 307. The bottom end of the rotating shaft 307 is rotatably connected to the top of the packed tower 2. Acidic gas enters the packed tower 2 through the inlet pipe 301 and floats upward into the packing chamber 314, making full contact with the packing. Simultaneously, the purified liquid is transported to the water delivery rod 306 through the water inlet pipe 304. The motor 305 drives the rotating shaft 307 to rotate, causing the first gear 308 on the outer wall of the rotating shaft 307 to rotate and mesh with the second gear 309, thereby driving the second gear 309 and the water delivery rod 306 inside it. The rotating agitator ensures that the spray plate 311 at the bottom of the water conveying rod 306 evenly sprays the purification liquid onto the packing material through the spray head. This guarantees a sufficient amount of purification liquid on the packing surface at all times, preventing localized over- or under-purification and ensuring full contact between gas and liquid throughout the packing layer. This allows the purification liquid to better remove acidic components from the gas. Simultaneously, the stirring rod rotates synchronously with the water conveying rod 306, agitating the packing material and further promoting full contact between the acidic gas, packing material, and purification liquid. This allows the purification liquid to flow better within the packing gaps, increasing the frequency of contact between acidic gas and purification liquid. This makes it easier for acid mist particles to be captured by the absorbent liquid, improving the separation efficiency of the acid mist and thus more effectively removing acidic substances from the mist.The purified gas then enters the gas filter 310 for secondary filtration to ensure that the discharged gas is even purer and meets environmental protection requirements. It is then discharged from the outlet pipe 302. The purified liquid flows into the storage tank 313 through the drainage holes on the fixed plate 312. The bottom of the storage tank 313 is designed with a 35-degree slope to facilitate the collection of the purified liquid along the slope and its smooth flow into the outlet pipe 303 for discharge, preventing the purified liquid from accumulating at the bottom of the storage tank 313.

[0026] When it is necessary to filter acidic gases inside the packing chamber 314, the purification liquid is first transported to the water delivery rod 306 through the inlet pipe 304. At the same time, the motor 305 drives the rotating shaft 307 to rotate, causing the first gear 308 on the outer wall of the rotating shaft 307 to rotate and mesh with the second gear 309. This drives the second gear 309 and the water delivery rod 306 inside to rotate together, so that the spray disc 311 at the bottom of the water delivery rod 306 sprays the purification liquid evenly onto the packing through the spray head, ensuring that there is always a sufficient amount of purification liquid on the surface of the packing, while stirring. The rod rotates synchronously with the water conveying rod 306 to stir the packing material, further promoting full contact between the acidic gas, packing material, and purification liquid. The purified gas then enters the gas filter 310 for secondary filtration to ensure compliance with environmental protection requirements before being discharged from the gas outlet pipe 302. The purified liquid flows into the storage tank 313 through the drain hole on the fixed plate 312. The bottom of the storage tank 313 is designed with a 35-degree slope to facilitate the collection of the purified liquid along the slope and its smooth flow into the water outlet pipe 303 for discharge, preventing the purified liquid from accumulating at the bottom of the storage tank 313.

[0027] In summary, this utility model includes a base 1 and a packed tower 2 disposed at the top of the base 1. A rotating filter assembly 3 is disposed on the inner wall of the packed tower 2 to reduce packing blockage and facilitate smoother gas-liquid flow for the separation and purification of acid mist. Through the synergistic effect of rotating the spraying purification liquid and stirring the packing, this utility model ensures that the purification liquid is evenly sprayed onto the packing, guaranteeing a sufficient amount of purification liquid on the packing surface at all times. This avoids localized over- or under-purification of the purification liquid, ensuring full contact between gas and liquid throughout the entire packing layer. This allows the purification liquid to better remove acidic components from the gas. Simultaneously, the stirring rod rotates synchronously with the water delivery rod 306, further stirring the packing and promoting full contact between the acidic gas, packing, and purification liquid. This allows the purification liquid to flow better within the packing gaps, increasing the frequency of contact between the acidic gas and the purification liquid. This makes it easier for acid mist particles to be captured by the absorbent liquid, improving the separation efficiency of the acid mist and more effectively removing acidic substances from it. This ensures that the discharged gas is purer and meets environmental protection requirements.

[0028] 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 embodiments and their equivalents.

Claims

1. A packing tower for separating acid mist at a gas phase outlet of a sulfuric acid absorption tower, comprising a base and a packing tower arranged at a top end of the base, characterized in that: a rotating filter assembly is arranged on an inner wall of the filter barrel and used for separating and purifying the acid mist; the rotating filter assembly comprises a protection box arranged at the top end of the packing tower, a motor is installed at a top end of the protection box, an output end of the motor penetrates through a top end of an inner wall of the protection box and is fixedly connected with a rotating shaft, a bottom end of the rotating shaft is rotationally connected with the top end of the packing tower, a first gear is fixedly connected with an outer wall of the rotating shaft and is meshingly connected with a second gear, a water delivery rod is fixedly connected with a central hole of the second gear, an inlet pipe is connected with a top end of an inner wall of the water delivery rod, a bottom end of the water delivery rod penetrates through a top end of an inner wall of the packing tower and is fixedly connected with a spraying disc, a stirring rod is fixedly connected with a bottom end center point of the spraying disc, and a fixed plate is rotationally connected with a bottom end of the stirring rod.

2. A packed column for separating acid mist from a gas phase outlet of a sulfuric acid absorption column according to claim 1, characterized in that: an outer wall of the fixed plate is fixedly connected with an inner wall of the packing tower, and a water leakage hole is arranged at a top end of the fixed plate.

3. A packed column for separating acid mist from a gas phase outlet of a sulfuric acid absorption column according to claim 2, characterized in that: a space between the top end of the fixed plate and a top end of the inner wall of the packing tower is set as a packing compartment, and a space between a bottom end of the fixed plate and a bottom end of the inner wall of the packing tower is set as a liquid storage compartment.

4. A packed column for separating acid mist from a gas phase outlet of a sulfuric acid absorption column according to claim 3, characterized in that: a bottom end of an inner wall of the liquid storage compartment is arranged at an inclined angle of 35 degrees, an air inlet hole is arranged on the inner wall of the liquid storage compartment, and an air inlet pipe is fixedly connected with an inner wall of the air inlet hole.

5. A packed column for separating acid mist from a gas phase outlet of a sulfuric acid absorption column according to claim 4, characterized in that: a water outlet hole is arranged on the inner wall of the liquid storage compartment, and a water outlet pipe is fixedly connected with an inner wall of the water outlet hole.

6. A packed column for separating acid mist from a gas phase outlet of a sulfuric acid absorption column according to claim 1, characterized in that: a gas filter is arranged at the top end of the packing tower, and an air outlet pipe is arranged at a top end of the packing tower.

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