Gas purification treatment device in boric anhydride crystallization process

Abstract

The invention relates to the technical field of gas treatment, and particularly discloses a boric anhydride crystallization process gas purification treatment device, which comprises a gas cooling device for receiving high-temperature gas generated in a boric anhydride crystallization process; the cyclone dust removal equipment is connected to the gas output end of the gas cooling equipment; the dynamic adsorption equipment is arranged at a gas output end at the top end of the cyclone dust removal equipment; the electrostatic dust removal equipment is fixed on a gas output end at the upper end of the cyclone dust removal equipment; the chemical spraying neutralization tower is fixedly arranged at the top end of the electrostatic dust collection equipment; wherein a dynamic adsorbent capable of entering the gas output end of the cyclone dust removal equipment is arranged in the dynamic adsorption equipment, and the position of the dynamic adsorbent is not fixed. The invention aims to solve the technical problems that the traditional treatment mode is simple, the follow-up treatment effect is influenced by high temperature, single-stage equipment is difficult to comprehensively and efficiently purify, the plant area is large in occupied area, the performance of an adsorbent is easy to reduce, gas is difficult to reach the standard and is discharged, and the environment is polluted.

Description

Technical Field

[0001] The present invention relates to the technical field of gas treatment, and specifically provides a gas purification and treatment device for the boron anhydride crystallization process. Background Art

[0002] During the production process of boron anhydride, a large amount of gas is generated in the boron anhydride crystallization link. If the gas is directly discharged into the atmospheric environment, it will cause pollution to the environmental ecology; the traditional gas treatment method in the boron anhydride crystallization process is relatively simple. The generated high-temperature and high-humidity gas will not only affect the effect of cyclone separation, but may also cause electrostatic adsorption and incomplete gas purification due to the too high gas temperature during the chemical spraying process; on the other hand, the gas usually contains a large amount of impurities, dust, moisture and harmful chemical substances, and ordinary single-stage treatment equipment is difficult to comprehensively and efficiently remove these pollutants; for example, some existing simple filtering devices cannot effectively separate tiny dust particles; some single adsorption devices are powerless for acidic or alkaline harmful components in the gas; at the same time, the previous gas purification devices are mostly in a decentralized layout, occupying a large area in the factory area, which is not conducive to intensive production; and in the traditional dynamic adsorption equipment, the position of the adsorbent is fixed. As the use time increases, the performance of the adsorbent drops significantly, and it is impossible to ensure continuous and efficient drying and adsorption treatment of the gas; the above deficiencies lead to the difficulty of the gas generated in the boron anhydride crystallization process to meet the emission standards, causing serious pollution to the atmospheric environment. Summary of the Invention

[0003] An embodiment of the present application provides a gas purification and treatment device for the boron anhydride crystallization process, mainly aiming to solve the technical problems that the high-temperature, high-humidity gas containing a large amount of impurities, dust and harmful chemical substances generated in the boron anhydride crystallization process is difficult to meet the emission standards and pollute the environment due to the simple traditional treatment method, the high temperature affects the subsequent treatment effect, the single-stage equipment is difficult to comprehensively and efficiently purify, the factory area occupies a large area, and the performance of the adsorbent is easy to decline.

[0004] To achieve the above object, an embodiment of the present application provides a gas purification and treatment device for the boron anhydride crystallization process, including: a gas cooling device for receiving the high-temperature gas generated in the boron anhydride crystallization process; a cyclone dust removal device connected to the gas output end of the gas cooling device; a dynamic adsorption device arranged on the gas output end at the top of the cyclone dust removal device for drying and adsorbing the gas passing through the inside; an electrostatic dust removal device fixed on the gas output end at the upper end of the cyclone dust removal device; a chemical spraying and neutralization tower fixed on the top of the electrostatic dust removal device for spraying a chemical neutralizing agent into the passing gas; wherein the cyclone dust removal device, the electrostatic dust removal device and the chemical spraying and neutralization tower are arranged in a stacked manner from bottom to top, and a dynamic adsorbent capable of entering the gas output end of the cyclone dust removal device is provided in the dynamic adsorption device, and the position of the dynamic adsorbent is not fixedly arranged.

[0005] In a feasible implementation manner, the gas cooling device is internally provided with a liquid cooling circulation medium pipeline. The two ends of the liquid cooling circulation medium pipeline are respectively connected to one ends of a first circulation heat exchange pipe and a second circulation heat exchange pipe. The other ends of the first circulation heat exchange pipe and the second circulation heat exchange pipe are connected to the dynamic adsorption device, and are used to provide heat to the dynamic adsorption device to realize the drying treatment of the dynamic adsorbent.

[0006] In a feasible implementation manner, the cyclone dust removal device includes: a dust removal outer shell, the lower half of the dust removal outer shell has a gradually changing diameter, and the inner cavity diameter gradually decreases from top to bottom, and is used to form a spiral air flow; a dynamic back suction cylinder, rotatably arranged in the inner cavity of the dust removal outer shell, the middle part of the dynamic back suction cylinder is hollow and is used to output gas upward; a fixing frame, fixedly supporting the bottom end of the dynamic back suction cylinder, and the dynamic back suction cylinder can rotate within the fixing frame; a linkage component, one end of which is drivingly connected to the outer wall of the dynamic back suction cylinder, and the other end is drivingly connected to the dynamic adsorption device, and is used to realize the synchronous movement of the dynamic back suction cylinder and the dynamic adsorbent; an umbrella-shaped flow equalizing plate, fixedly arranged in the inner cavity of the upper half of the cyclone dust removal device, and the umbrella-shaped flow equalizing plate is opposite to the top opening position of the dynamic back suction cylinder.

[0007] In a feasible implementation manner, the linkage component includes: a speed change gear box, fixedly arranged in the inner cavity of the upper half of the dust removal outer shell; a transmission component, one end of which is drivingly connected to the power output end of the speed change gear box, and the other end of the transmission component is drivingly connected to the dynamic adsorption device; a driving transmission part, located in the inner cavity of the upper half of the dust removal outer shell and fixedly sleeved on the outer wall of the dynamic back suction cylinder, and the driving transmission part is connected to the power input end of the speed change gear box.

[0008] In a feasible implementation manner, the dynamic adsorption device includes a columnar outer shell arranged on one side of the electrostatic dust removal device, and further includes: a fan, fixedly arranged at the top end of the inner cavity of the columnar outer shell; a heat exchange cavity, arranged in the upper part and the middle part of the columnar outer shell, and the cross-sectional area of the lower half part of the heat exchange cavity is smaller than that of the upper half part; spiral heat exchange fins, arranged in the lower half part of the heat exchange cavity and used to extend the air flow path; a diffusion cavity, arranged in the bottom inner cavity of the columnar outer shell; an arc-shaped flow equalizing plate, fixedly installed at the middle position of the diffusion cavity, and a plurality of through holes are opened in the arc-shaped flow equalizing plate, and the diameters of the plurality of through holes gradually decrease from inside to outside, and the arc-shaped flow equalizing plate is located directly above the dynamic adsorbent; a moisture absorption interception box, removably arranged below the dynamic adsorbent and corresponding to the position of the arc-shaped flow equalizing plate.

[0009] In a feasible implementation manner, the dynamic adsorbent is fixed on the outer wall of an external rotating rod. The dynamic adsorbent includes an activated carbon layer and a desiccant layer. The desiccant layer is located below the activated carbon layer. A shaped dust-proof mesh sleeve is provided on the outer walls of the desiccant layer and the activated carbon layer. A maintenance door that can be opened and closed is also provided on the surface of the columnar housing.

[0010] In a feasible implementation manner, the electrostatic precipitator includes: a plurality of dust collecting electrodes longitudinally arranged at intervals in the inner cavity of the electrostatic precipitator; a corona electrode, which is a regular polygon, and each corona electrode is fixedly sleeved on the outside of the dust collecting electrode.

[0011] In a feasible implementation manner, the chemical spray neutralization tower includes a spray tower and a spray rack inside the spray tower, and further includes: an umbrella-shaped intercepting plate fixedly arranged at the bottom end of the inner cavity of the spray tower; an air supply rack fixedly connected to the top of the umbrella-shaped intercepting plate and connected to the air flow output end of the electrostatic precipitator; a plurality of air supply nozzles arranged at equal intervals above the umbrella-shaped intercepting plate and all communicated with the air supply rack, and the jet angle of each air supply nozzle is downward; a drain pipe connected to the body of the spray tower and located above the umbrella-shaped intercepting plate; an exhaust pipe connected to the body of the spray tower above the spray rack for outputting the treated gas.

[0012] In a feasible implementation manner, the following are provided on the dynamic back suction cylinder: an outer cylinder rotatably arranged in the middle of the inner cavity of the dust removal housing; a plurality of stress fan blades all arranged on the outer wall of the outer cylinder and corresponding to the air inlet position of the outer cylinder.

[0013] In a feasible implementation manner, the following are further provided on the dynamic back suction cylinder: an inner lifting cylinder capable of lifting and moving arranged inside the outer cylinder and fitting on the inner wall of the outer cylinder. A threaded block is also provided on the outer wall of the inner lifting cylinder; an adjusting screw rod movably arranged on the outer cylinder and passing through the threaded block; a plurality of gears fixedly installed on the rotating shaft of each stress fan blade, and the gears are located in the inner cavity of the outer cylinder; a plurality of racks fixedly installed on the outer wall of the inner lifting cylinder, and the racks correspond to the gears one by one and are meshed and connected.

[0014] The present application provides a gas purification and treatment device for the boric anhydride crystallization process. In terms of temperature control, the gas cooling equipment adopts heat exchange means to reduce the temperature of the high-temperature gas to an appropriate range, effectively avoiding the adverse effects of high temperature on subsequent cyclone separation, electrostatic adsorption and chemical spraying, improving the purification efficiency of each stage, and reducing the incomplete purification caused by temperature problems; in terms of dust removal and impurity removal, the cyclone dust removal equipment uses centrifugal force to achieve preliminary dust removal, and can efficiently separate solid particles with larger mass, greatly reducing the burden of subsequent processing; the electrostatic dust removal equipment is based on the principle of electrostatic adsorption, successfully removes fine dust particles, and makes up for the deficiency that mechanical methods are difficult to capture tiny particles. Compared with traditional single-stage dust removal equipment, it significantly improves the removal capacity of dust of different particle sizes; in gas drying and adsorption of small particles, the cyclone dust removal equipment can effectively remove small particles, greatly reducing the burden of subsequent processing; in terms of dust removal and impurity removal, the cyclone dust removal equipment can effectively remove small particles, effectively ... In terms of impurities, the dynamic adsorbent inside the dynamic adsorption equipment relies on its porous structure and chemical activity to dry the gas and adsorb water vapor and small molecular impurities, keeping its performance in a good state, helping to maintain the cleanliness of the electrodes of the electrostatic precipitator and avoid dust blocking the electrodes and affecting the purification effect; in the acid-base neutralization purification level, the chemical spray neutralization tower uses chemical reactions to convert the residual acidic or alkaline harmful components in the gas into harmless substances, achieving deep purification of the gas, ensuring that the gas meets emission standards, reducing pollution to the atmospheric environment, providing clean gas conditions for subsequent related process links, optimizing the entire boric anhydride production exhaust gas treatment process, and protecting the ecological environment; in addition, the stacked arrangement of multiple equipment from bottom to top greatly reduces the area occupied by the plant, realizes intensive production, and effectively saves land resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a gas purification treatment device for a boric anhydride crystallization process provided in an embodiment of the present application from a first angle is shown;

[0016] Figure 2 A schematic structural diagram of a second angle of a gas purification treatment device for a boric anhydride crystallization process provided in an embodiment of the present application is shown;

[0017] Figure 3 A schematic diagram of the structure of an electrostatic precipitator provided in an embodiment of the present application is shown;

[0018] Figure 4 The structural schematic diagram of the chemical spray neutralization tower provided in the embodiment of the present application is shown;

[0019] Figure 5 A schematic diagram of the structure of a dynamic adsorption device provided in an embodiment of the present application is shown;

[0020] Figure 6 A schematic diagram of a three-dimensional cross-sectional structure of a cyclone dust removal device provided in an embodiment of the present application is shown;

[0021] Figure 7 ShowsFigure 6 Partial enlarged structural schematic diagram at position A in

[0022] Figure 8 Structural schematic diagram of the umbrella-shaped flow equalizing plate provided by the embodiment of the present application is shown;

[0023] Figure 9 Structural schematic diagram of the adjusting screw provided by the embodiment of the present application is shown;

[0024] Figure 10 Structural schematic diagram of the threaded block provided by the embodiment of the present application is shown;

[0025] Figure 11 Shown is Figure 10 Partial enlarged structural schematic diagram at position B in

[0026] In the figure: 10, gas cooling equipment; 20, cyclone dust removal equipment; 30, dynamic adsorption equipment; 40, electrostatic dust removal equipment; 50, chemical spray neutralization tower; 11, first circulation heat exchange tube; 12, second circulation heat exchange tube; 21, dust removal housing; 22, dynamic back suction cylinder; 23, fixing frame; 24, variable speed gear box; 25, transmission assembly; 26, active transmission part; 27, umbrella-shaped flow equalizing plate; 31, fan; 32, heat exchange cavity; 33, spiral heat exchange fin; 34, diffusion cavity; 35, arc-shaped flow equalizing plate; 36, dynamic adsorbent, 361, activated carbon, 362, desiccant; 37, moisture absorption interception box; 38, external rotating rod; 41, dust collecting electrode; 42, corona electrode; 51, spray rack; 52, umbrella-shaped intercepting plate; 53, air supply rack; 54, air supply nozzle; 55, drain pipe; 56, exhaust pipe; 221, outer cylinder; 222, stress fan blade; 223, adjusting screw; 224, inner lifting cylinder; 225, threaded block; 226, gear; 227, rack. Detailed implementation manners

[0027] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below through the drawings and specific embodiments. It should be understood that the specific features in the embodiments of this specification and the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. Without conflict, the technical features in the embodiments of this specification and the embodiments can be combined with each other.

[0028] In this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. The term "more than two" includes two or more than two cases.

[0029] In the present technology, boric anhydride is prepared by heating boric acid to decompose it. Boric acid will undergo a decomposition reaction when heated to a certain temperature. The heating process requires a relatively high temperature, usually around 300 - 400 °C, which makes the generated gas have a relatively high temperature. At the same time, a large amount of water vapor generated by the decomposition makes the gas have a high humidity. In industrial production, in order to ensure that boric acid can be fully decomposed, the pyrolysis reaction is often carried out at a relatively high temperature, which results in the generated gas containing not only a large amount of water vapor but also a relatively high temperature.

[0030] Please refer to Figures 1 to 11 As shown, the embodiment of the present application provides a gas purification treatment device for the boric anhydride crystallization process, which can effectively control the harmful components discharged into the atmospheric environment and protect the atmospheric environment. This device specifically includes: a gas cooling device 10, a cyclone dust removal device 20, a dynamic adsorption device 30, an electrostatic dust removal device 40, and a chemical spray neutralization tower 50;

[0031] Specifically, the gas cooling device 10 is used to receive the high-temperature gas generated during the boric anhydride crystallization process; the cyclone dust removal device 20 is connected to the gas output end of the gas cooling device 10; the dynamic adsorption device 30 is arranged at the gas output end on the top of the cyclone dust removal device 20 and is used to dry and adsorb the gas passing through it; the electrostatic dust removal device 40 is fixed at the gas output end on the upper part of the cyclone dust removal device 20; the chemical spray neutralization tower 50 is fixedly arranged on the top of the electrostatic dust removal device 40 and is used to spray a chemical neutralizing agent into the passing gas;

[0032] Among them, the cyclone dust removal device 20, the electrostatic dust removal device 40, and the chemical spray neutralization tower 50 are stacked from bottom to top respectively, with a small floor area in the factory area. A dynamic adsorbent 36 that can enter the gas output end inside the cyclone dust removal device 20 is provided in the dynamic adsorption device 30, and the position of the dynamic adsorbent 36 changes at all times to ensure that the performance of the dynamic adsorbent 36 is in a better state.

[0033] The gas purification treatment device for the boric anhydride crystallization process has a multi-stage treatment process. First, the gas cooling device 10 receives the high-temperature gas generated by the boric anhydride crystallization process. The principle is that if the high-temperature gas directly enters the subsequent treatment link, it will not only affect the effect of the subsequent cyclone separation, but also prevent the incomplete gas purification caused by electrostatic adsorption and excessive gas temperature in the chemical spray. The gas temperature is reduced to a range suitable for subsequent treatment by means of heat exchange cooling. Next, the cyclone dust removal device 20 uses the principle of centrifugal force and is connected to the gas output end of the gas cooling device 10. When the gas enters at a high speed, the solid particles with larger mass are thrown to the wall of the device under the action of centrifugal force, and fall into the ash hopper along the wall to achieve preliminary dust removal. The dynamic adsorption device 30 is placed on the gas output end at the top of the cyclone dust removal device 20. The internal dynamic adsorbent 36 is always rotating, and a part of it is always in the working area, which can fully contact with the gas. With the porous structure and chemical activity of the adsorbent, the passing gas is dried, and the water vapor and some small molecular impurities therein are adsorbed, ensuring that the gas is further purified, which helps the gas entering the electrostatic dust removal device 40 to be at a reasonable dryness level, and avoids the situation where dust blocks the electrode. Subsequently, the electrostatic dust removal device 40 is fixed on the gas output end at the top of the dynamic adsorption device 30. Based on the principle of electrostatic adsorption, the tiny dust particles in the gas are charged, and they move in a directional manner under the action of the electric field and adsorb on the electrode, removing those extremely fine particles that are difficult to capture mechanically. The chemical spray neutralization tower 50 is fixed on the top of the electrostatic dust removal device 40, spraying chemical neutralizers into the passing gas, and using chemical reactions to convert the residual acidic or alkaline harmful components in the gas into harmless substances, such as neutralizing acidic gases to generate salts and water. Through this series of progressive purification treatments, impurities, dust, moisture and harmful chemicals in the gas during the boric anhydride crystallization process can be effectively removed, ensuring that the gas meets emission standards and reduces pollution to the environment. At the same time, it also provides clean gas conditions for subsequent related process links and improves the gas treatment effect of the entire boric anhydride production process.

[0034] like Figure 1 and Figure 2 As shown, in some examples, further, the gas cooling device 10 has a built-in liquid cooling circulating medium pipeline, and both ends of the liquid cooling circulating medium pipeline are respectively connected to one end of the first circulating heat exchange tube 11 and the second circulating heat exchange tube 12, and the other end of the first circulating heat exchange tube 11 and the second circulating heat exchange tube 12 is connected to the dynamic adsorption device 30, which is used to provide heat to the dynamic adsorption device 30 to achieve drying treatment of the dynamic adsorbent 36.

[0035] In this example, when high-temperature gas flows into the gas cooling device 10, the liquid cooling circulating medium flows in the pipeline, and through the principle of heat conduction, it quickly absorbs the heat of the gas to achieve preliminary cooling of the gas. At the same time, the two ends of the liquid circulating medium pipeline are respectively connected to the first circulating heat exchange tube 11 and the second circulating heat exchange tube 12, and the other ends of the first circulating heat exchange tube 11 and the second circulating heat exchange tube 12 are connected to the dynamic adsorption device 30. When the dynamic adsorbent 36 tends to be moist after adsorbing a large amount of water vapor and impurities, which may affect the adsorption efficiency, the medium carrying heat in the circulating heat exchange tube flows into the dynamic adsorption device 30. The power of the cycle is the water pump set in the gas cooling device. The medium flows into the dynamic adsorption device 30, releases heat, lowers the temperature, and then flows back to the gas cooling device to reduce the temperature of the gas entering the device again. Based on heat transfer, the temperature of the dynamic adsorbent 36 is increased, and the water vapor evaporates and leaves the adsorbent surface due to heat, and the dynamic adsorbent 36 is successfully dried. This not only maintains the high adsorption performance of the dynamic adsorbent 36, ensuring that it can continuously and efficiently remove water vapor and small molecular impurities in the gas, but also cleverly utilizes the heat collected during the gas cooling process to form an energy-saving system with internal heat recycling, further optimizing the entire gas purification process and improving the stability, efficiency and economy of the device operation.

[0036] like Figures 6 to 11 As shown, in some examples, further, the cyclone dust removal device 20 includes: a dust removal shell 21, a dynamic back-suction cylinder 22, a fixed frame 23, a linkage component and an umbrella-shaped flow equalizing plate 27; the diameter of the lower half of the dust removal shell 21 is gradual, and the inner cavity diameter gradually decreases from top to bottom, so as to form a spiral airflow; the dynamic back-suction cylinder 22 can be rotatably arranged in the inner cavity of the dust removal shell 21, and the middle part of the dynamic back-suction cylinder 22 is hollow, so as to output gas upward; the fixed frame 23 is rotatably supported at the bottom end of the dynamic back-suction cylinder 22, and the dynamic back-suction cylinder 22 can rotate in the fixed frame 23; one end of the linkage component is transmission-connected to the outer wall of the dynamic back-suction cylinder 22, and the other end is transmission-connected to the dynamic adsorption device 30, so as to realize the synchronous movement of the dynamic back-suction cylinder 22 and the dynamic adsorbent 36; the umbrella-shaped flow equalizing plate 27 is fixedly arranged in the inner cavity of the upper half of the cyclone dust removal device 20, and the umbrella-shaped flow equalizing plate 27 is directly opposite to the top opening position of the dynamic back-suction cylinder 22.

[0037] In this example, the specific structure of the cyclone dust removal device 20 is further provided, in which the lower half of the dust removal shell 21 adopts a gradual diameter structure, and the inner cavity diameter gradually decreases from top to bottom. According to the principle of centrifugal force and airflow movement, when dust-laden gas enters, the contraction of the space causes the gas to rotate faster, forming a stable and strong spiral airflow, allowing dust particles to efficiently gather to the wall of the shell under the action of centrifugal force; the dynamic re-suction cylinder 22 is rotatably arranged in the inner cavity of the dust removal shell 21, and the hollow design in the middle is used to output the preliminarily purified gas upward to ensure that the clean airflow correctly enters the next processing link; the fixed frame 23 provides a stable support for the dynamic re-suction cylinder 22 to ensure that it can rotate flexibly at the bottom; one end of the linkage component is transmission-connected to the outer wall of the dynamic re-suction cylinder 22, and the other end is connected to the dynamic adsorption device 30. The mechanism is set up to realize the synchronous movement of the dynamic re-suction cylinder 22 and the dynamic adsorbent 36, so that the flow rhythm of the gas in the cyclone dust removal and subsequent adsorption treatment process is consistent. For example, when the gas enters at a too fast speed, the dynamic re-suction cylinder 22 can be driven to rotate efficiently. At this time, the performance of the dynamic adsorbent 36 will also need to be improved. By setting the linkage components, the flow rate is positively correlated with the performance of the dynamic adsorbent 36, thereby optimizing the overall purification efficiency; and the umbrella-shaped flow equalizing plate 27 is fixed to the upper half of the inner cavity of the cyclone dust removal equipment 20, facing the top opening of the dynamic re-suction cylinder 22. The umbrella-shaped flow equalizing plate 27 can effectively break up the incoming airflow, evenly distribute the flow rate and flow rate, avoid local airflow impact causing incomplete purification or turbulence affecting subsequent processes, and comprehensively improve the dust removal efficiency of the cyclone dust removal equipment 20.

[0038] like Figures 6 to 8 As described, in some examples, further, the linkage components include: a speed gear box 24, a transmission assembly 25 and an active transmission member 26, the speed gear box 24 is fixedly arranged in the inner cavity of the upper half of the dust removal shell 21; one end of the transmission assembly 25 is transmission-connected to the power output end of the speed gear box 24, and the other end of the transmission assembly 25 is transmission-connected to the dynamic adsorption device 30; the active transmission member 26 is located in the inner cavity of the upper half of the dust removal shell 21, and is fixedly mounted on the outer wall of the dynamic back-suction cylinder 22, and the active transmission member 26 is connected to the power input end of the speed gear box 24.

[0039] In this example, the transmission structure of the linkage components is further clarified. The variable speed gearbox 24, as the core control unit, is fixedly arranged in the inner cavity of the upper half of the dust removal housing 21, and is used to synchronously transfer the rotational kinetic energy of the dynamic suction cylinder 22 to the external rotating rod 38 in the dynamic adsorption device 30. By driving the rotation of the external rotating rod 38, the dynamic adsorbent 36 is synchronously driven to rotate, so as to keep the area of the dynamic adsorbent 36 entering the dust removal housing 21 changing in real time. The active transmission part 26 is located in the same inner cavity space. For example, a gear is used, and the gear is firmly sleeved on the outer wall of the dynamic suction cylinder 22 and is directly connected to the power input end of the variable speed gearbox 24. In this way, when the dynamic suction cylinder 22 rotates under the action of air flow or other external forces, the power can be immediately transmitted to the variable speed gearbox 24. One end of the transmission assembly 25 is closely connected to the power output end of the variable speed gearbox 24, and the other end is accurately docked with the dynamic adsorption device 30. By virtue of its reliable mechanical transmission relationship, the strong torque low-speed rotational power after reasonable speed regulation by the variable speed gearbox 24 is transmitted to the dynamic adsorption device 30, so as to ensure the stable and synchronous movement of the dynamic suction cylinder 22 and the dynamic adsorbent 36. It not only ensures the smooth transition of gas in the two key links of cyclone dust removal and dynamic adsorption, optimizes the coherence of the purification process, but also can flexibly adjust the rotation speed of the dynamic adsorbent 36 according to the actual situation, so as to achieve a high-quality purification effect of the gas generated in the boric anhydride crystallization process.

[0040] As Figure 5 and Figure 6 shown, in some examples, furthermore, the dynamic adsorption device 30 includes a columnar housing arranged on one side of the electrostatic dust removal device 40, and further includes: a fan 31, a heat exchange chamber 32, spiral heat exchange fins 33, a diffusion chamber 34, an arc-shaped flow equalizing plate 35 and a moisture absorption and interception box 37. The fan 31 is fixedly arranged at the top of the inner cavity of the columnar housing; the heat exchange chamber 32 is arranged in the upper and middle parts of the columnar housing, and the cross-sectional area of the lower half cavity of the heat exchange chamber 32 is smaller than that of the upper half cavity; the spiral heat exchange fins 33 are arranged in the lower half cavity of the heat exchange chamber 32 and are used to extend the air flow path; the diffusion chamber 34 is arranged in the bottom inner cavity of the columnar housing; the arc-shaped flow equalizing plate 35 is fixedly installed in the middle of the diffusion chamber 34, and a plurality of through holes are opened in the arc-shaped flow equalizing plate 35, and the aperture of the plurality of through holes gradually decreases from the center to the periphery. The arc-shaped flow equalizing plate 35 is located directly above the dynamic adsorbent 36; the moisture absorption and interception box 37 can be detachably arranged below the dynamic adsorbent 36 and corresponds to the position of the arc-shaped flow equalizing plate 35.

[0041] In this example, a dynamic adsorption link of a gas purification treatment device for the boric anhydride crystallization process is provided, and each component of the dynamic adsorption device 30 complements each other. Specifically, the columnar outer shell serves as the external infrastructure and is arranged on the side of the electrostatic dust removal device 40. The fan 31 is fixedly installed at the top of the inner cavity of the columnar outer shell. After being started, it strongly blows air into the columnar outer shell, promoting the accelerated flow of the gas and ensuring sufficient gas flow rate and flow supply when the performance of the dynamic adsorbent 36 (such as the degree of dryness) is restored subsequently. The heat exchange chamber 32 is distributed in the upper and middle parts of the columnar outer shell. The cross-sectional area of the lower half cavity is smaller than that of the upper half. In this way, in cooperation with the spiral heat exchange fins 33 inside, when the gas flows through, heat exchange occurs between the air flow and the medium in the internal channels of the spiral heat exchange fins 33. The temperature of the medium decreases, and the temperature of the air flow increases. The medium with reduced temperature is transported back to the gas cooling device 10 again. Therefore, on the one hand, heat exchange is achieved using the temperature difference through the spiral heat exchange fins 33, and the gas temperature is adjusted to facilitate adsorption. On the other hand, the spiral heat exchange fins 33 extend the air flow path, enabling the gas to fully contact the wall of the heat exchange chamber 32 and improving the heat exchange efficiency. The diffusion chamber 34 is placed in the inner cavity at the bottom of the columnar outer shell, which plays a role in buffering and evenly distributing the air flow, avoiding uneven adsorption caused by the impact of the air flow. The arc-shaped flow equalizing plate 35 is fixedly installed in the middle of the diffusion chamber 34. The design that the through hole in the middle is larger than the through holes at the edges and the aperture of the through hole gradually becomes smaller from the inside to the outside can adjust the distribution of the air flow passing through, making the gas flowing above evenly disperse onto the surface of the dynamic adsorbent 36, ensuring the consistency of the dynamic adsorption treatment effect on different positions of the air flow. The moisture absorption and interception box 37 is detachably installed below the dynamic adsorbent 36 and corresponds to the position of the arc-shaped flow equalizing plate 35. It can not only receive the liquid water or impurities (such as a small amount of impurities that cannot be captured in the cyclone dust removal device 20) that fall during the adsorption process, preventing secondary pollution, but also facilitate regular cleaning and maintenance, ensuring the continuous high-performance operation of the dynamic adsorption device 30 and comprehensively improving the ability of the gas to be dried and adsorb impurities.

[0042] As Figure 5 and Figure 6 shown, in some examples, further, the dynamic adsorbent 36 is fixed on the external rotating rod 38 and can rotate following the external rotating rod 38, including an activated carbon 361 layer and a desiccant 362 layer. The desiccant 362 layer is located below the activated carbon 361 layer. A shaped dust-proof net sleeve is provided on the outer walls of the desiccant 362 layer and the activated carbon 361 layer. A maintenance door that can be opened and closed is also provided on the surface of the columnar outer shell.

[0043] In this example, the activated carbon layer 361 is located above. With its porous structure and large surface area, it has a strong adsorption capacity for organic impurities, odor molecules, etc. in the gas, can effectively purify the gas components, and improve the purity of the gas. The desiccant layer 362 is located below the activated carbon layer 361 and focuses on capturing the water vapor in the gas to ensure that the dryness of the gas meets the requirements of the subsequent electrostatic dust removal process. The two complement each other to achieve the dual removal of gas impurities and moisture. The shaped dust-proof net sleeve arranged on the outer walls of the desiccant layer 362 and the activated carbon layer 361 can not only prevent external dust impurities from mixing in during the adsorption process, avoiding interference with the performance of the adsorbent, but also ensure that the adsorbent maintains its complete structure during dynamic operation and does not scatter. The openable maintenance door equipped on the surface of the columnar shell provides a convenient guarantee for the long-term stable operation of the entire dynamic adsorption device 30. The operator can conveniently open the maintenance door to regularly check the usage status of the adsorbent, replace the aged or ineffective adsorbent, and clean the impurities that may accumulate inside the device, greatly reducing the equipment operation and maintenance difficulty, extending the service life of the equipment, and continuously providing efficient services for the purification of boric anhydride crystallization gas.

[0044] As Figure 3 shown, in some examples, further, the electrostatic dust removal device 40 includes: a plurality of dust collecting electrodes 41 and corona electrodes 42. The plurality of dust collecting electrodes 41 are longitudinally spaced in the inner cavity of the electrostatic dust removal device 40; the corona electrode 42 is a regular polygon, and each corona electrode 42 is fixedly sleeved outside a dust collecting electrode 41.

[0045] In this example, the plurality of dust collecting electrodes 41 of the electrostatic dust removal device 40 are longitudinally equidistantly arranged in the inner cavity, reserving a reasonable space for gas flow, so that the dusty gas can flow smoothly through; when the gas flows through, the dust collecting electrode 41 plays a capturing role, attracting the charged dust particles in the gas with the charge carried by itself and making them adhere to the surface to achieve the preliminary dust removal effect; the corona electrode 42 is a regular polygon, and each corona electrode 42 is fixedly sleeved outside the dust collecting electrode 41; on the one hand, the regular polygon corona electrode 42 can release corona more evenly into the surrounding space to form a stable and high-intensity electric field, prompting the tiny dust particles in the gas to be quickly charged; on the other hand, the structure that the corona electrode 42 is sleeved outside the dust collecting electrode 41 enables the corona electrode 42 and the dust collecting electrode 41 to cooperate closely, strengthening the action range and intensity of the electric field, making the dust particles move and adsorb more accurately and efficiently towards the dust collecting electrode 41 under the drive of the electric field force, and improving the removal ability of the electrostatic dust removal device 40 for fine dust particles.

[0046] As Figure 4As shown, in some examples, further, the chemical spray neutralization tower 50 includes a spray tower and a spray rack 51 inside the spray tower, and the spray solution used can be an alkaline neutralizer, such as sodium hydroxide (NaOH) solution, calcium hydroxide (Ca(OH)2) solution, etc.;

[0047] The chemical spray neutralization tower 50 also includes: an umbrella-shaped intercepting plate 52, an air supply frame 53, a plurality of air supply nozzles 54, a drain pipe 55 and an exhaust pipe 56. The umbrella-shaped intercepting plate 52 is fixedly arranged at the bottom end of the inner cavity of the spray tower; the air supply frame 53 is fixedly connected to the top end of the umbrella-shaped intercepting plate 52, and is connected to the air flow output end of the electrostatic dust removal device 40; for example, the air supply frame 53 has an inner cavity, and the inner cavity of the air supply frame 53 is connected to the air flow output end of the electrostatic dust removal device 40. A plurality of air supply nozzles 54 are arranged at equal intervals above the umbrella-shaped intercepting plate 52, and are all connected to the air supply frame 53, and the jet angle of each air supply nozzle 54 is downward; the drain pipe 55 is connected to the tower body of the spray tower and is located above the umbrella-shaped intercepting plate 52; the exhaust pipe 56 is connected to the tower body of the spray tower at the upper part of the spray frame 51 for outputting the treated gas.

[0048] In the chemical spray neutralization link of the boric anhydride crystallization process gas in this example, the chemical spray neutralization tower 50 serves as the final gas purification procedure. The spray tower serves as the main container. The spray rack 51 is located at the top thereof, responsible for uniformly spraying the chemical neutralizer. The umbrella-shaped intercepting plate 52 is fixedly arranged at the bottom of the inner cavity of the spray tower, which plays the role of diversion and water flow interception, separates the electrostatic dust removal equipment 40 from the chemical spray neutralization tower 50, and prevents moisture from entering the electrostatic dust removal equipment 40. When the airflow from the electrostatic dust removal equipment 40 flows into the chemical spray neutralization tower 50 at a high speed from the electrostatic dust removal equipment 40, the umbrella-shaped intercepting plate 52 cooperates with the air supply rack 53 to change the direction of the airflow. The air supply rack 53 is fixedly connected to the top of the umbrella-shaped intercepting plate 52, and the internal channel of the air supply rack 53 is connected to the airflow output end of the electrostatic dust removal equipment 40 to ensure smooth gas introduction. A plurality of air supply nozzles 54 are evenly spaced and distributed above the umbrella-shaped intercepting plate 52 and connected to the air supply rack 53. The jetting angle is downward, so that the incoming gas is fully in contact with the neutralizer sprayed from above, which greatly increases the gas-liquid contact area and contact time, and improves the neutralization reaction efficiency. On the other hand, by setting the air supply nozzle 54 downward, the spray liquid from above is prevented from entering the air supply nozzle 54, and leakage of the spray liquid is effectively prevented. The drain pipe 55 is connected to the tower body of the spray tower and is located between the umbrella-shaped intercepting plate 52 and the air supply rack 53, so that the waste liquid generated by the reaction can be discharged in time to prevent the accumulation of liquid from affecting subsequent operations. The exhaust pipe 56 is connected to the tower body of the spray tower on the upper part of the spray rack 51, and is used to output the clean gas after being fully neutralized. At this point, after layers of purification, the gas generated in the boric anhydride crystallization process can be processed in multiple stages and links, and then the emission meets the standards.

[0049] like Figure 6 ,Figure 8 , Figure 9 and Figure 10 As shown in Figure 8 , Figure 9 , and Figure 10 , in some examples, further, the dynamic suction cylinder 22 is provided with an outer cylinder 221 and a plurality of force-receiving fan blades 222. The outer cylinder 221 is rotatably arranged in the middle of the inner cavity of the dust removal housing 21. The plurality of force-receiving fan blades 222 are all arranged on the outer wall of the outer cylinder 221 and correspond to the air inlet position of the outer cylinder 221.

[0050] In this example, it can be understood that the outer cylinder 221 is rotatably arranged in the middle of the inner cavity of the dust removal housing 21, which is different from the fixed setting method in the prior art. The purpose is to rotate according to the airflow to synchronously drive the dynamic adsorbent to achieve the position switching function. The plurality of force-receiving fan blades 222 are evenly arranged on the outer wall of the outer cylinder 221 and accurately correspond to the air inlet position of the outer cylinder 221. When the dust-containing gas rushes into the dust removal housing 21 at high speed, the gas first impacts the force-receiving fan blades 222. According to the principle of fluid mechanics, the impact force of the airflow is converted into the rotational torque of the fan blades, driving the outer cylinder 221 to rotate accordingly. At the same time, due to the setting of the inclination or arc direction of the fan blades, the gas entering the dust removal housing 21 can be quickly redirected to quickly achieve a spiral airflow, thereby strengthening the separation effect of the centrifugal force on the dust particles and making the dust gather more efficiently towards the wall of the housing.

[0051] As Figures 9 to 11 shown, in some examples, further, the dynamic suction cylinder 22 is also provided with an adjusting screw 223, an inner lifting cylinder 224, a plurality of gears 226, and a plurality of racks 227. The inner lifting cylinder 224 is arranged to be able to move up and down inside the outer cylinder 221 and fits on the inner wall of the outer cylinder 221. A threaded block 225 is also arranged on the outer wall of the inner lifting cylinder 224. The adjusting screw 223 is arranged to be able to move on the outer cylinder 221. The adjusting screw 223 can rotate but its axial displacement remains unchanged. The adjusting screw 223 passes through the threaded block 225. The plurality of gears 226 are fixedly installed on the rotating shafts of each of the force-receiving fan blades 222 one by one. The gears 226 are located in the inner cavity of the outer cylinder 221. The plurality of racks 227 are fixedly installed on the outer wall of the inner lifting cylinder 224. The racks 227 correspond to the gears 226 one by one and are meshed and connected.

[0052] In this example, the inner lifting cylinder 224 is fitted to the inner wall of the outer cylinder 221 in a liftable manner. The thread block 225 on its outer wall cooperates with the adjusting screw rod 223 that penetrates through it. The operator can precisely control the lifting position of the inner lifting cylinder 224 by rotating the adjusting screw rod 223. When there are special situations such as a relatively low or high water vapor content in the gas flow, even if the flow rate values are the same, due to the different impacts of water vapor on the subsequent dynamic adsorption process, to ensure the best purification effect, it is necessary to adapt a specific switching speed of the dynamic adsorbent 36. This requires increasing the rotation speed of the dynamic back-suction cylinder 22. At this time, the gear 226 fixed on the rotating shaft of the force-bearing fan blade 222 is located in the inner cavity of the outer cylinder 221 and is engaged with the rack 227 fixed on the outer wall of the inner lifting cylinder 224 and corresponding one by one. Among them, the rotating shaft of the force-bearing fan blade 222 cooperates with the installation hole opened on the outer cylinder 221 to ensure that the vertical position of the force-bearing fan blade 222 remains unchanged. As the inner lifting cylinder 224 moves up and down, the rack 227 drives the gear 226 to rotate, thereby changing the angle of the force-bearing fan blade 222. According to the principle of fluid mechanics, the adjustment of the angle of the force-bearing fan blade 222 will change the conversion efficiency of the impact force of the gas on the fan blade, so as to flexibly control the rotation speed of the outer cylinder 221, realize the adaptive rotation of the dynamic back-suction cylinder 22 according to different gas conditions, ensure that the subsequent dynamic adsorbent 36 is provided with just the right gas delivery rhythm, greatly improve the response ability of the entire device to complex gas conditions, and ensure the stable and efficient operation of the boric anhydride crystallization gas purification process.

[0053] The above are only examples of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A gas purification device for a boric anhydride crystallization process, characterized in that: include: A gas cooling device (10) is used to receive high-temperature gas generated during the boric anhydride crystallization process; A cyclone dust removal device (20) connected to a gas output end of the gas cooling device (10); A dynamic adsorption device (30) is arranged on the gas output end at the top of the cyclone dust removal device (20) and is used to dry and adsorb the gas passing through the inside; An electrostatic dust removal device (40) is fixed to a gas output end at the upper end of the cyclone dust removal device (20); A chemical spray neutralization tower (50) is fixedly mounted on the top of the electrostatic precipitator (40) and is used to spray a chemical neutralizer into the passing gas; The cyclone dust removal device (20), the electrostatic dust removal device (40) and the chemical spray neutralization tower (50) are respectively stacked from bottom to top, and the dynamic adsorption device (30) is provided with a dynamic adsorbent (36) capable of entering into the gas output end of the cyclone dust removal device (20), and the position of the dynamic adsorbent (36) is not fixed.

2. The gas purification treatment device for boric anhydride crystallization process according to claim 1, characterized in that: The gas cooling device (10) has a built-in liquid cooling circulating medium pipeline, and the two ends of the liquid cooling circulating medium pipeline are respectively connected to one end of a first circulating heat exchange tube (11) and a second circulating heat exchange tube (12), and the other ends of the first circulating heat exchange tube (11) and the second circulating heat exchange tube (12) are connected to the dynamic adsorption device (30) for providing heat to the dynamic adsorption device (30) to achieve drying of the dynamic adsorbent (36).

3. The gas purification treatment device for boric anhydride crystallization process according to claim 1, characterized in that: The cyclone dust removal device (20) comprises: A dust removal housing (21), wherein the diameter of the lower half of the dust removal housing (21) is gradually changed, and the inner cavity diameter gradually decreases from top to bottom, so as to form a spiral airflow; A dynamic re-suction cylinder (22) is rotatably disposed in the inner cavity of the dust removal housing (21), wherein the middle portion of the dynamic re-suction cylinder (22) is hollow and is used to output gas upwards; A fixed frame (23) fixedly supported on the bottom end of the dynamic re-suction cylinder (22), wherein the dynamic re-suction cylinder (22) is capable of rotating within the fixed frame (23); A linkage component, one end of which is drivingly connected to the outer wall of the dynamic re-absorption cylinder (22), and the other end of which is drivingly connected to the dynamic adsorption device (30), for realizing synchronous movement of the dynamic re-absorption cylinder (22) and the dynamic adsorbent (36); An umbrella-shaped flow equalizing plate (27) is fixedly arranged in the inner cavity of the upper half of the cyclone dust removal device (20), and the umbrella-shaped flow equalizing plate (27) is directly opposite to the top opening position of the dynamic re-suction cylinder (22).

4. The gas purification treatment device for boric anhydride crystallization process according to claim 3, characterized in that: The linkage components include: A speed change gear box (24) is fixedly arranged in the inner cavity of the upper half of the dust removal housing (21); A transmission assembly (25), one end of which is transmission-connected to the power output end of the speed change gear box (24), and the other end of which is transmission-connected to the dynamic adsorption device (30); The active transmission member (26) is located in the inner cavity of the upper half of the dust removal housing (21) and is fixedly sleeved on the outer wall of the dynamic suction cylinder (22). The active transmission member (26) is connected to the power input end of the speed change gear box (24).

5. The gas purification treatment device for boric anhydride crystallization process according to claim 3, characterized in that: The dynamic adsorption device (30) comprises a columnar housing arranged on one side of the electrostatic dust removal device (40), and further comprises: A fan (31) is fixedly mounted on the top of the inner cavity of the cylindrical housing; A heat exchange cavity (32) is arranged at the upper part and the middle part of the columnar shell, and the cross-sectional area of ​​the lower half of the heat exchange cavity (32) is smaller than the cross-sectional area of ​​the upper half of the cavity; A spiral heat exchange fin (33) is arranged in the lower half of the heat exchange cavity (32) and is used to extend the airflow path; A diffusion chamber (34) is arranged in the bottom inner chamber of the cylindrical housing; An arc-shaped flow averaging plate (35) is fixedly mounted in the middle of the diffusion chamber (34), a plurality of through holes are provided in the arc-shaped flow averaging plate (35), and the apertures of the plurality of through holes gradually decrease from the inside to the outside. The arc-shaped flow averaging plate (35) is located directly above the dynamic adsorbent (36); The moisture absorption interception box (37) is detachably arranged below the dynamic adsorbent (36) and corresponds to the position of the arc-shaped flow balancing plate (35).

6. The gas purification treatment device for boric anhydride crystallization process according to claim 5, characterized in that: The dynamic adsorbent (36) is fixed on the outer wall of the external rotating rod (38), and the dynamic adsorbent (36) comprises an activated carbon (361) layer and a desiccant (362) layer, wherein the desiccant (362) layer is located below the activated carbon (361) layer, and the outer walls of the desiccant (362) layer and the activated carbon (361) layer are provided with a shaped dustproof mesh sleeve, and the surface of the columnar shell is also provided with an openable and closable maintenance door.

7. The gas purification treatment device for boric anhydride crystallization process according to claim 5, characterized in that: The electrostatic dust removal device (40) comprises: A plurality of dust collecting electrodes (41), wherein the plurality of dust collecting electrodes (41) are longitudinally spaced apart and arranged in the inner cavity of the electrostatic dust removal device (40); The corona stage (42) is a regular polygon, and each of the corona stages (42) is fixedly sleeved on the outer side of the dust collecting electrode (41).

8. The gas purification treatment device for boric anhydride crystallization process according to claim 7, characterized in that: The chemical spray neutralization tower (50) comprises a spray tower and a spray rack (51) inside the spray tower, and also comprises: An umbrella-shaped intercepting plate (52) is fixedly arranged at the bottom end of the inner cavity of the spray tower; An air delivery frame (53) is fixedly connected to the top of the umbrella-shaped intercepting plate (52) and is connected to the airflow output end of the electrostatic dust removal device (40); A plurality of air supply nozzles (54) are arranged at equal intervals above the umbrella-shaped intercepting plate (52) and are all connected to the air supply frame (53), and the jetting angle of each of the air supply nozzles (54) is downward; A liquid discharge pipe (55) connected to the spray tower body and located above the umbrella-shaped intercepting plate (52); An exhaust pipe (56) is connected to the spray tower body at the upper part of the spray rack (51) and is used to output the treated gas.

9. The gas purification treatment device for boric anhydride crystallization process according to claim 7, characterized in that: The dynamic re-suction cylinder (22) is provided with: An outer cylinder (221) is rotatably disposed in the middle of the inner cavity of the dust removal housing (21); A plurality of force-bearing blades (222) are all arranged on the outer wall of the outer cylinder (221) and correspond to the positions of the air inlets of the outer cylinder (221).

10. The gas purification device for boric anhydride crystallization process according to claim 9, characterized in that: The dynamic re-suction cylinder (22) is also provided with: An inner lifting cylinder (224) is arranged on the inner side of the outer cylinder (221) and is capable of lifting and lowering movement, and is attached to the inner wall of the outer cylinder (221). A threaded block (225) is also arranged on the outer wall of the inner lifting cylinder (224); An adjusting screw (223) is movably disposed on the outer cylinder (221) and penetrates the threaded block (225); A plurality of gears (226) are fixedly mounted on the rotating shaft of each of the force-bearing blades (222), and the gears (226) are located in the inner cavity of the outer cylinder (221); A plurality of racks (227) are fixedly mounted on the outer wall of the inner lifting cylinder (224); the racks (227) correspond to the gears (226) one by one and are meshedly connected.

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