Tail gas collecting device of continuous acidolysis reactor

Abstract

The utility model belongs to the technical field of titanium dioxide chemical equipment, and relates to a tail gas collecting device of a continuous acidolysis reactor, which comprises a reactor, a reactor smoke collecting hood and a primary dissolving tank, a smoke return pipeline is connected with a blanking pipeline, the blanking pipeline is communicated with the primary dissolving tank through an air return fan, and the top surface of the primary dissolving tank is connected with a smoke collecting pipeline through a filter base. A negative pressure fan is arranged on the smoke collecting pipeline, a base cleaning assembly is installed on the filtering base, and a plurality of particle adsorption pieces are arranged on the smoke return pipeline in a drawable mode. Through double filtration of the primary dissolving tank and the filter base and the particle adsorption sheet in the smoke return pipeline, the number of solid-phase particles entering the smoke collecting pipeline is reduced, the filter base is cleaned in real time through the base cleaning assembly, the service life is prolonged, and the cost is reduced. An air return fan and a negative pressure fan are matched to ensure that the whole system is kept in a negative pressure state, material guiding is facilitated, secondary oxidation of tail gas is avoided, and the burden of a tail gas treatment system is relieved.

Description

Technical Field

[0001] This utility model relates to the field of titanium dioxide chemical equipment technology, and in particular to a continuous acid hydrolysis reactor tail gas collection device. Background Technology

[0002] The tail gas treatment device for the continuous acid hydrolysis reactor is an important component of the continuous acid hydrolysis reactor. Its main function is to effectively collect the waste gas generated during the continuous acid hydrolysis process and introduce it into the tail gas treatment system to ensure that it meets the emission standards after unified treatment.

[0003] Traditional exhaust gas collection methods primarily involve opening an exhaust port at the top of the fume hood. Exhaust gas and accompanying flue gas enter the flue gas collection duct through this port and are ultimately discharged from the top of the duct. Figure 1 As shown, however, while collecting flue gas, some dust and reaction products generated by the reaction will inevitably enter the flue gas collection pipe. Over time, solid particles in the exhaust gas will gradually deposit on the inner wall of the exhaust gas collection pipe. This will not only cause the effective diameter of the flue to gradually decrease, but in severe cases, it will also cause complete blockage of the pipe, thereby affecting the normal operation and overall efficiency of the exhaust gas treatment system. Utility Model Content

[0004] To address the problem of pipe blockage caused by solid particulate matter deposition, this invention provides a continuous acid hydrolysis reactor tail gas collection device.

[0005] The technical solution of this utility model is achieved through the following scheme: a continuous acid hydrolysis reactor tail gas collection device, including a reactor, a reactor fume hood, and a primary dissolution tank. The reactor is covered with a reactor fume hood, and the reactor fume hood is provided with oppositely arranged return fume pipes. The reactor is provided with oppositely arranged discharge pipes, and the return fume pipes are connected to the discharge pipes. The discharge pipes are connected to the primary dissolution tank through a return air fan. The top surface of the primary dissolution tank is connected to a flue gas collection pipe through a filter base. A negative pressure fan is provided on the flue gas collection pipe. A base cleaning assembly is installed on the filter base. Several particle adsorption sheets are retractable on the return fume pipe.

[0006] Through the above technical solutions, the dual filtration of the primary dissolution tank and the filter base, as well as the particle adsorption plates in the flue gas return pipe, greatly reduces the amount of solid particles entering the flue gas collection pipe, lowering the risk of deposition and blockage. The filter base is cleaned in real time by the base cleaning component, which improves its service life. In conjunction with the return air fan and negative pressure fan, the entire system is kept in a negative pressure state, which facilitates material introduction and prevents secondary oxidation of the exhaust gas, thus reducing the burden on the exhaust gas treatment system.

[0007] Preferably, the base cleaning assembly includes a drive motor, a transmission component, a cleaning brush, and a support plate. The drive motor is connected to the cleaning brush through the transmission component, the transmission component passes through the support plate, the support plate is detachably mounted on the filter base, and the cleaning brush is located inside the filter base.

[0008] Preferably, the drive motor is detachably mounted on the support base, the support base is fixedly mounted on the top surface of the primary dissolution tank, and the cleaning brush bristles abut against the bottom surface of the filter base.

[0009] Preferably, the flue gas collection pipe has a snap-fit ​​interface that matches the support plate.

[0010] Through the above technical solutions, the support plate can be detachably installed on the filter base, which not only facilitates installation and maintenance, but also allows for the replacement of the cleaning brush or deep cleaning when necessary. The bristles of the cleaning brush abut against the bottom surface of the filter base to ensure that the particles attached to the filter base can be thoroughly removed, keeping the flue gas flowing smoothly and preventing blockage and wear caused by particle accumulation, thereby extending the service life of the equipment. The snap-fit ​​interface design allows for quick disassembly and reinstallation of the support plate and the base cleaning components on it when needed, improving the convenience and efficiency of maintenance work.

[0011] Preferably, the filter base is detachably installed on the top surface of the primary dissolution tank, and the filter base is in the shape of an annular protrusion.

[0012] Preferably, a filter support is installed on the protruding end of the filter base, and a filter is installed inside the filter support.

[0013] With the above technical solutions, the filter base can be easily removed from the primary dissolution tank when needed for cleaning, filter replacement, or maintenance. This not only improves the convenience of maintenance but also reduces maintenance costs. The annular protrusion effectively increases the contact area between the filter base and the top surface of the primary dissolution tank, thereby improving installation stability. At the same time, the annular protrusion can also provide sufficient support space for the filter support and the filter, ensuring that the filter can be stably installed on the support and effectively filter particulate matter in the exhaust gas.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. This utility model greatly reduces the amount of solid particles entering the flue gas collection pipe through dual filtration of a primary dissolution tank and a filter base, as well as particle adsorption plates in the flue gas return pipe, thereby reducing the risk of deposition and blockage. The filter base is cleaned in real time by the base cleaning component, which improves its service life. In conjunction with the return air fan and negative pressure fan, the entire system is kept in a negative pressure state, which facilitates material introduction and prevents secondary oxidation of the exhaust gas, thus reducing the burden on the exhaust gas treatment system.

[0016] 2. The support plate is detachably mounted on the filter base, which not only facilitates installation and maintenance but also allows for replacement of the cleaning brush or deep cleaning when necessary. The bristles of the cleaning brush abut against the bottom surface of the filter base, ensuring thorough removal of particles adhering to the filter base, maintaining unobstructed flue gas flow, preventing blockage and wear caused by particle accumulation, thereby extending the service life of the equipment. The snap-fit ​​interface design allows for quick disassembly and reinstallation of the support plate and its base cleaning components when needed, improving the convenience and efficiency of maintenance work.

[0017] 3. When needed, the filter base can be easily removed from the primary dissolution tank for cleaning, filter replacement, or maintenance. This not only improves the convenience of maintenance but also reduces maintenance costs. The annular protrusion effectively increases the contact area between the filter base and the top surface of the primary dissolution tank, thereby improving installation stability. At the same time, the annular protrusion also provides sufficient support space for the filter support and the filter, ensuring that the filter can be stably installed on the support and effectively filter particulate matter in the exhaust gas. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the prior art structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 3 This is a three-dimensional connection structure diagram of the primary dissolving tank of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the flue gas collection pipe after disassembly.

[0022] Figure 5 This is a schematic diagram of the assembly structure of the base cleaning component and the filter base of this utility model;

[0023] Figure 6 This is a three-dimensional assembly structure diagram of the smoke return pipe of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Reactor; 2. Reactor fume hood; 3. Return fume duct; 4. Particle adsorption sheet; 5. Feeding duct; 6. Primary dissolution tank; 7. Filter base; 71. Filter screen support; 72. Filter screen; 8. Flue gas collection duct; 9. Base cleaning assembly; 91. Support base; 92. Drive motor; 93. Transmission component; 94. Cleaning brush; 95. Support plate; 10. Return air fan; 11. Negative pressure fan. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification. The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] A continuous acidolysis reactor tail gas collection device, such as Figures 1-6 As shown, the system includes a reactor 1, a reactor fume hood 2, and a primary dissolution tank 6. The reactor 1 is covered by the reactor fume hood 2, which has a correspondingly arranged return fume pipe 3. The reactor 1 also has a correspondingly arranged feed pipe 5. The return fume pipe 3 is connected to the feed pipe 5, and the feed pipe 5 is connected to the primary dissolution tank 6 via a return air fan 10. The top surface of the primary dissolution tank 6 is connected to a flue gas collection pipe 8 via a filter base 7. A negative pressure fan 11 is installed on the flue gas collection pipe 8. A base cleaning assembly 9 is installed on the filter base 7. Several particle adsorption plates 4 are retractable on the return fume pipe 3. A liquid inlet pipe is installed on the primary dissolution tank 6. The return air fan 10 and the negative pressure fan 11 ensure that the entire system is in a negative pressure state, which facilitates material introduction and improves the overall operating efficiency of the system. Preferably, there are four particle adsorption plates 4 on a single return fume pipe 3. The four particle adsorption plates 4 are arrayed on the return fume pipe 3 to adsorb particles as much as possible. Two return fume pipes 3 ensure that the titanium dioxide material enters the reaction process. The system exhausts flue gas and impedes particulate matter to prevent excessive accumulation of flue gas in reactor 1. The feed inlet of reactor 1 is connected to feed pipe 5. When the feed inlet of reactor 1 is opened after the reaction is complete, a small portion of the generated flue gas and titanium dioxide reaction particles enter feed pipe 5 and then enter the primary dissolution tank 6. Most of the generated flue gas enters the primary dissolution tank 6 through return flue gas pipe 3. The particle adsorption sheet 4 can be replaced and cleaned when the machine is stopped. A small portion of the flue gas particles settle in the dissolving liquid in the primary dissolution tank 6, increasing its service life. The filter base 7 completely isolates the flue gas particles, reducing the possibility of flue gas particles clogging the flue gas collection pipe. The flue gas collection pipe 8 is located on the top surface of the primary dissolution tank 6. The primary dissolution tank 6 is not filled to a full state to prevent the flue gas collection pipe 8 from sucking in the titanium dioxide dissolution reaction liquid. The base cleaning component 9 cleans the filter base 7 in real time to prevent the filter base 7 from clogging. There are two return flue gas pipes 3, two feed pipes 5, and two primary dissolution tanks 6. Finally, the flue gas is collected and discharged into the flue gas collection pipe.

[0028] The base cleaning assembly 9 includes a drive motor 92, a transmission component 93, a cleaning brush 94, and a support plate 95. The drive motor 92 is connected to the cleaning brush 94 through the transmission component 93, which passes through the support plate 95. The support plate 95 is detachably mounted on the filter base 7. The cleaning brush 94 is located inside the filter base 7. The transmission component 93 is a bevel gear meshing transmission. The output end of the drive motor 92 is connected to a small bevel gear, which drives a large bevel gear to rotate, thereby driving the cleaning brush 94 to rotate and clean inside the filter base 7. The drive motor 92 is detachably mounted on a support base 91, which is fixedly mounted on the top surface of the primary dissolving tank 6. The bristles of the cleaning brush 94 abut against the bottom surface of the filter base 7, with the bristles abutting against the filter screen 72 inside the filter base 7. The support plate 95 is passed through by the output end of the drive motor 92, supporting the output end of the drive motor 92. A fixing rod extends from the support plate 95. The large bevel gear and its transmission rod are securely positioned at the center of the filter base 7 to ensure smooth transmission and prevent transmission problems or damage caused by the shaking of the transmission component 93. Bearings are installed at the mounting positions of the fixed rod and the transmission rod to ensure that the transmission rod can effectively rotate to drive the cleaning brush 94. The flue gas collection pipe 8 has a snap-fit ​​interface that matches the support plate 95. The flue gas collection pipe 8 is flange-connected to the filter base 7, and its support plate 95 is also flange-connected to the filter base 7. After installation, the flue gas collection pipe 8 and the support plate 95 form a complete pipe. Rubber is provided at the assembly gap between the support plate 95 and the flue gas collection pipe 8 to ensure a seal. At the same time, the flange connection between the support plate 95 and the filter base 7 and the detachable installation of the drive motor 92 make the entire cleaning assembly more convenient for maintenance or replacement, which can significantly extend the service life of the filter base 7 and the filter screen 72 and reduce the replacement cost caused by blockage or damage.

[0029] The filter base 7 is detachably installed on the top surface of the primary dissolution tank 6. The filter base 7 is in the shape of an annular protrusion. A filter screen bracket 71 is installed at the protruding end of the filter base 7. A filter screen 72 is installed inside the filter screen bracket 71. The filter base 7 is snapped into the primary dissolution tank 6. The primary dissolution tank 6 has bolt holes corresponding to the filter base 7. After the flange of the flue gas collection pipe 8 is aligned, the three are fixed. The support plate 95 is connected to the flange of the filter base 7 separately. The filter screen bracket 71 makes the filter screen 72 more stable and less prone to deformation.

[0030] Working principle: When the return air fan 10 is started, the flue gas generated when the reactor 1 is reacting is blocked by the reactor fume hood 2 and is drawn into the primary dissolution tank 6 through the two return smoke pipes 3 on the reactor fume hood 2 and the feed pipe 5. During the process of drawing in the flue gas, the solid particles attached to the flue gas are adsorbed by the particle adsorption plates 4 in the return smoke pipe 3.

[0031] After the reaction in reactor 1 is completed, it is ready to be fed. The feed port is opened, and a small portion of the generated flue gas is directly fed into the primary dissolution tank 6 along with the reactants through the feed pipe 5. After the reactants dissolve in the primary dissolution tank 6, the fixed particles in the flue gas have also settled in the primary dissolution tank 6. At this time, the negative pressure fan 11 on the flue gas collection pipe 8 is started to draw in the flue gas and guide it to be discharged. The solid particles are completely isolated by the filter base 7, which solves the problem of solid phase deposition in the flue gas collection pipe 8 and achieves the goal of safe emission of tail gas in compliance with standards.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A continuous acidolysis reactor tail gas collection device, characterized in that: The reactor includes a reactor (1), a reactor fume hood (2), and a primary dissolution tank (6). The reactor (1) is covered with a reactor fume hood (2). The reactor fume hood (2) is provided with a return smoke pipe (3) arranged opposite to it. The reactor (1) is provided with a feed pipe (5) arranged opposite to it. The return smoke pipe (3) is connected to the feed pipe (5). The feed pipe (5) is connected to the primary dissolution tank (6) through a return air fan (10). The top surface of the primary dissolution tank (6) is connected to a flue gas collection pipe (8) through a filter base (7). The flue gas collection pipe (8) is provided with a negative pressure fan (11). The filter base (7) is equipped with a base cleaning assembly (9). Several particle adsorption sheets (4) can be pulled out on the return smoke pipe (3).

2. The continuous acidolysis reactor tail gas collection device according to claim 1, characterized in that: The base cleaning assembly (9) includes a drive motor (92), a transmission component (93), a cleaning brush (94), and a support plate (95). The drive motor (92) is connected to the cleaning brush (94) through the transmission component (93). The transmission component (93) passes through the support plate (95). The support plate (95) is detachably mounted on the filter base (7). The cleaning brush (94) is located inside the filter base (7).

3. The continuous acidolysis reactor tail gas collection device according to claim 2, characterized in that: The drive motor (92) is detachably mounted on the support base (91), the support base (91) is fixedly mounted on the top surface of the primary dissolution tank (6), and the bristles of the cleaning brush (94) abut against the bottom surface of the filter base (7).

4. The continuous acidolysis reactor tail gas collection device according to claim 2, characterized in that: The flue gas collection pipe (8) has a snap-fit ​​interface that is compatible with the support plate (95).

5. The continuous acidolysis reactor tail gas collection device according to claim 1, characterized in that: The filter base (7) is detachably installed on the top surface of the primary dissolution tank (6), and the filter base (7) is in the shape of annular protrusion.

6. The continuous acidolysis reactor tail gas collection device according to claim 5, characterized in that: The filter base (7) has a filter support (71) installed on its protruding end, and a filter (72) is installed inside the filter support (71).

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