Phosphoric acid tail gas guiding device

Abstract

The utility model discloses a phosphoric acid tail gas guiding device, which belongs to the technical field of tail gas guiding and comprises an outer layer pipe, a middle layer is sleeved on the inner side wall of the outer layer pipe, an inner layer pipe is sleeved on the inner side wall of the middle layer, a flange is arranged at the center of one side wall of the outer layer pipe, and a spiral guide plate is arranged at the center inside the inner layer pipe. In addition, through the three-layer structure, all layers play different roles, the overall performance of the device is improved, the situation that local flow velocity is too high or airflow dead angles exist is avoided, the transmission efficiency and uniformity of phosphoric acid tail gas in the pipeline are improved, and the service life of the phosphoric acid tail gas pipeline is prolonged. The tail gas purification device can be used for providing better conditions for subsequent treatment links, meanwhile, different filtering parts can be flexibly mounted and dismounted, and the corresponding filtering parts can be replaced or adjusted in time according to the change of actual tail gas components, content and purification effect.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust gas guidance technology, specifically a phosphoric acid exhaust gas guidance device. Background Technology

[0002] In modern industrial production, phosphoric acid is widely produced and applied in many fields, such as fertilizer manufacturing, food additives, electronics, and metallurgy. However, the treatment of tail gas generated during phosphoric acid production has always been an important issue for industrial environmental protection and safe production. During the phosphoric acid production process, the tail gas mainly contains hydrogen fluoride, silicon tetrafluoride, sulfur dioxide, and other acidic gases and dust. These tail gases not only cause serious environmental pollution but also pose a threat to the corrosion of production equipment and the health of operators. Through a phosphoric acid tail gas guiding device, the tail gas generated during the phosphoric acid production process can be treated and guided efficiently and safely.

[0003] Existing phosphoric acid tail gas guiding devices have the following main shortcomings:

[0004] In the existing phosphoric acid tail gas guiding device, the flow state of the tail gas in the pipeline is prone to local excessive flow velocity, resulting in uneven overall flow velocity. Dead airflow corners may also be formed in some parts of the pipeline. Furthermore, the treatment effect of tail gas is not ideal, making it difficult for tail gas emissions to fully meet environmental protection standards. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a phosphoric acid tail gas guiding device, which solves the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a phosphoric acid tail gas guiding device, comprising: an outer tube, an intermediate layer sleeved on the inner wall of the outer tube, an inner tube sleeved on the inner wall of the intermediate layer, a flange at the center of one side wall of the outer tube, a spiral guide plate at the center of the inner tube, and a filter disassembly structure at one side of the center of the inner tube.

[0007] As a further embodiment of this utility model: the filter disassembly structure includes a filter frame, which is disposed at the center of the inner tube on one side. The inner wall of the inner tube is provided with four first sliding grooves arranged in a ring on one side. The outer wall of the filter frame is provided with four first sliding blocks arranged in a ring. The inner wall of the filter frame is provided with four second sliding grooves arranged in a ring. A second sliding block is slidably connected to the center of each of the four second sliding grooves.

[0008] As a further embodiment of this utility model: three slots are arranged horizontally on the inner sidewalls of the four second sliders. A filter screen is provided at the center of the slot on one side, activated carbon is provided at the center of the slot in the center, and absorbent cotton is provided at the center of the slot on the other side.

[0009] As a further embodiment of this utility model: the four first sliders are respectively slidably connected inside the four first grooves.

[0010] As a further embodiment of this utility model: the outer wall of the flange is provided with four threaded holes arranged in a ring, and the flange is made of rubber.

[0011] As a further embodiment of this utility model: the outer tube is made of polyurethane, the middle layer is made of woven fiber filaments, and the inner tube is made of polytetrafluoroethylene.

[0012] As a further embodiment of this utility model: four limiting bolts are arranged in a ring on one side wall of the flange, and one end of each of the four limiting bolts passes through one side wall of the flange and one side wall of the outer tube to the inside of the outer tube, and the ends are threaded into the inside of the outer tube.

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

[0014] 1. This utility model uses a three-layer structure of outer tube, middle layer and inner tube, each layer plays a different role, which improves the overall performance of the device. In addition, the spiral guide plate makes the phosphoric acid tail gas flow along a specific spiral path, avoiding excessive local flow velocity or dead air angles, improving the transmission efficiency and uniformity of phosphoric acid tail gas in the pipeline, and providing better conditions for subsequent treatment.

[0015] 2. This utility model allows for the flexible installation and disassembly of different filter components via a filter frame and its cooperating first slide groove, first slider, second slide groove, second slider, and slot. The corresponding filter components can be replaced or adjusted in a timely manner according to changes in the actual exhaust gas composition, content, and purification effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional cross-sectional view of the present invention;

[0018] Figure 3 This is a three-dimensional disassembly diagram of the filter disassembly structure of this utility model;

[0019] Figure 4 for Figure 2 Enlarged diagram of point A in the middle.

[0020] In the diagram: 1. Outer tube; 2. Flange; 3. Middle layer; 4. Inner tube; 5. Filter disassembly structure; 501. Filter frame; 502. First slide groove; 503. First slider; 504. Second slide groove; 505. Second slider; 506. Slot; 507. Filter screen; 508. Activated carbon; 509. Adsorbent cotton; 6. Spiral guide plate; 7. Limiting bolt. Detailed Implementation

[0021] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0022] like Figures 1-4 As shown, this utility model provides a technical solution:

[0023] A phosphoric acid tail gas guiding device, comprising:

[0024] The outer tube 1 has an inner layer 3 fitted on its inner wall, and an inner tube 4 fitted on its inner wall. A flange 2 is located at the center of one side wall of the outer tube 1. A spiral guide plate 6 is located at the center of the inner tube 4. A filter disassembly structure 5 is located on one side of the center of the inner tube 4. Four threaded holes are arranged in a ring on the outer wall of the flange 2. The flange 2 is made of rubber, the outer tube 1 is made of polyurethane, the inner layer 3 is made of woven fiber, and the inner tube 4 is made of polytetrafluoroethylene. Four limiting bolts 7 are arranged in a ring on one side wall of the flange 2. One end of each of the four limiting bolts 7 passes through one side wall of the flange 2 and one side wall of the outer tube 1 and leads to the inside of the outer tube 1. The ends of each bolt are threaded into the inside of the outer tube 1.

[0025] By connecting the phosphoric acid tail gas through flange 2 into the pipeline structure consisting of outer tube 1, intermediate tube 3, and inner tube 4, the phosphoric acid tail gas undergoes a spiral motion as it enters the inner tube 4 via a spiral guide plate 6. This promotes a more uniform and efficient flow of the phosphoric acid tail gas in the central area of ​​the pipeline, improving the tail gas transmission efficiency. The polyurethane material of the outer tube 1 has certain flexibility, wear resistance, and chemical corrosion resistance, protecting the intermediate tube 3 and inner tube 4 and withstanding certain pressure. The intermediate tube 3, woven from fiber filaments, provides a certain mechanical strength and stability to the entire structure. The polytetrafluoroethylene material of the inner tube 4 is stable and highly corrosion-resistant, preventing the phosphoric acid tail gas from corroding the inner tube 4 and ensuring the service life of the device. Flange 2 is made of rubber, providing good sealing and shock absorption, preventing tail gas leakage and reducing the impact of pipeline vibration on the device. The limit bolt 7 further reinforces the connection between flange 2 and outer tube 1, ensuring the structural integrity and sealing of the entire device.

[0026] The filter disassembly structure 5 includes a filter frame 501, which is located inside the inner tube 4 at one side of the center. Four first sliding grooves 502 are arranged in a ring on one side of the inner wall of the inner tube 4. Four first sliding blocks 503 are arranged in a ring on the outer wall of the filter frame 501. Four second sliding grooves 504 are arranged in a ring on the inner wall of the filter frame 501. A second sliding block 505 is slidably connected to the center of each of the four second sliding grooves 504. Three slots 506 are arranged laterally on the inner wall of the four second sliding blocks 505. A filter screen 507 is located at the center of one of the slots 506, and activated carbon is located at the center of the slot 506 at the center. 508, an adsorption cotton 509 is provided in the center of the slot 506 on the other side. The four first sliders 503 are slidably connected to the four first sliding grooves 502 respectively. When the phosphoric acid tail gas passes through the filter disassembly structure 5, the impurities and large dust particles in the phosphoric acid tail gas are first intercepted by the filter screen 507. The odor and harmful gas components in the tail gas are adsorbed by the activated carbon 508. Because the activated carbon 508 has a rich pore structure, it has a strong adsorption performance. At the same time, some water vapor, small particles, and harmful substances that have not been completely adsorbed in the phosphoric acid tail gas can be further adsorbed by the adsorption cotton 509. The tail gas is purified through multiple filtration and adsorption methods.

[0027] The working principle of this utility model is as follows:

[0028] Phosphoric acid tail gas is connected to the device through flange 2. By connecting flange 2 to the tail gas emission port of the phosphoric acid production system, the rubber flange 2 has good sealing performance, which not only ensures that the tail gas can enter the device smoothly, but also prevents tail gas leakage. After flange 2 is connected, the phosphoric acid tail gas enters the pipeline structure composed of outer tube 1, middle tube 3 and inner tube 4. The outer tube 1 is made of polyurethane, which has flexibility, wear resistance and chemical corrosion resistance, and can protect the internal structure and withstand a certain pressure. The middle tube 3 is made of woven fiber, which provides structural strength and stability to the device. The inner tube 4 is made of polytetrafluoroethylene, which has stable properties and strong corrosion resistance, and can prevent phosphoric acid tail gas from corroding the pipeline, ensuring stable transmission of phosphoric acid tail gas in the pipeline.

[0029] After the exhaust gas enters the inner tube 4, the phosphoric acid exhaust gas passes through the filter screen 507, which intercepts larger particles of dust and impurities, preventing these particles from continuing to flow with the phosphoric acid exhaust gas and potentially affecting subsequent processes, such as clogging pipes or interfering with the normal operation of other equipment. Activated carbon 508, with its large specific surface area and abundant pore structure, has a strong adsorption capacity, effectively adsorbing odors and various harmful gaseous components in the phosphoric acid exhaust gas, such as some volatile organic compounds and some acidic gases. Furthermore, the adsorption cotton 509 further adsorbs water vapor, small particles, and residual harmful substances not completely adsorbed by the activated carbon 508, achieving more thorough purification of the phosphoric acid exhaust gas. Simultaneously, the spiral guide plate 6 plays a crucial role, directing the phosphoric acid exhaust gas along a specific spiral path. This spiral motion allows the phosphoric acid exhaust gas to be more evenly distributed in the central area of ​​the inner tube 4, avoiding excessively high local flow rates or dead zones, improving the transmission efficiency and uniformity of the phosphoric acid exhaust gas in the pipeline, and providing better conditions for subsequent treatment processes.

[0030] Furthermore, the filter disassembly structure 5 is slidably connected to the first slide groove 502 via the first slider 503 and to the interior of the second slider 505 via the second slide groove 504, making the installation and disassembly of the filter screen 507, activated carbon 508, and adsorption cotton 509 more convenient. When the filter material needs to be replaced or cleaned, the corresponding parts can be easily removed and installed without complicated operations, which facilitates the normal operation of the device and maintains a good purification effect.

[0031] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A phosphoric acid tail gas guiding device, characterized by, Include: The outer tube (1), the inner wall of the outer tube (1) is sleeved with an intermediate layer (3), the inner wall of the intermediate layer (3) is sleeved with an inner tube (4), the flange (2) is arranged at the center of one side wall of the outer tube (1), the spiral guide plate (6) is arranged at the center of the inner tube (4), and the filter dismounting structure (5) is arranged at the center of the inner tube (4) on one side.

2. A phosphoric acid tail gas guiding device according to claim 1, characterized in that: The filter dismounting structure (5) comprises a filter frame (501), the filter frame (501) is arranged at the center of the inner tube (4) on one side, four first sliding grooves (502) are arranged in a ring shape at the center of the inner wall of the inner tube (4) on one side, four first sliding blocks (503) are arranged in a ring shape on the outer wall of the filter frame (501), and four second sliding grooves (504) are arranged in a ring shape on the inner wall of the filter frame (501), wherein the second sliding blocks (505) are slidably connected to the inner center of the four second sliding grooves (504).

3. A phosphoric acid tail gas guiding device according to claim 2, characterized in that: Three clamping grooves (506) are arranged in a transverse direction on the inner wall of the four second sliding blocks (505), a filter screen (507) is arranged at the inner center of the clamping groove (506) on one side, activated carbon (508) is arranged at the inner center of the clamping groove (506) in the center, and adsorbing cotton (509) is arranged at the inner center of the clamping groove (506) on the other side.

4. The phosphosilicate tail gas guiding device of claim 2, wherein: The four first sliding blocks (503) are respectively slidably connected in the four first sliding grooves (502).

5. The phosphosilicate tail gas guiding device of claim 1, wherein: The outer wall of the flange (2) is arranged in a ring shape with four threaded holes, and the material of the flange (2) is rubber.

6. The phosphosilicate tail gas guiding device of claim 1, wherein: The material of the outer tube (1) is polyurethane, the material of the intermediate layer (3) is woven by fiber filaments, and the material of the inner tube (4) is polytetrafluoroethylene.

7. The phosphosilicate tail gas guiding device of claim 1, wherein: The flange (2) is arranged in a ring shape on one side wall with four limiting bolts (7), one end of the four limiting bolts (7) is sequentially penetrated through the side wall of the flange (2) and the side wall of the outer tube (1) and reaches the inside of the outer tube (1), and the end is threadedly connected to the inside of the outer tube (1).

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