A device for purifying gases in a crystallization process of boron anhydride

Abstract

The application relates to the technical field of gas treatment, and particularly discloses a gas purification treatment device for a boron anhydride crystallization process, which comprises a gas cooling device for receiving high-temperature gas generated in the boron anhydride crystallization process; a cyclone dust removal device connected to a gas output end of the gas cooling device; a dynamic adsorption device arranged on the gas output end at the top end of the cyclone dust removal device; an electrostatic dust removal device fixed on the gas output end at the upper end of the cyclone dust removal device; and a chemical spraying neutralization tower fixedly arranged at the top end of the electrostatic dust removal device; wherein the dynamic adsorption device is provided with dynamic adsorbents capable of entering the gas output end of the cyclone dust removal device, and the position of the dynamic adsorbents is non-fixedly arranged. The application aims to solve the technical problems of simple traditional treatment mode, high-temperature influence on subsequent treatment effect, difficulty in comprehensive and efficient purification by single-stage equipment, large factory site, easy performance decline of adsorbents, difficult gas discharge up to standards and environmental pollution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas treatment, in particular to a gas purification treatment device for boron trioxide crystallization process. BACKGROUND

[0002] In the production process of boron trioxide, a large amount of gas is generated in the boron trioxide crystallization link. If the gas is directly discharged into the atmospheric environment, it will pollute the ecological environment. The traditional gas treatment method for boron trioxide crystallization process is relatively simple. The high-temperature and high-humidity gas generated will not only affect the effect of cyclone separation, but also may cause electrostatic adsorption and chemical spraying process due to the excessively high temperature of the gas, resulting in incomplete gas purification. On the other hand, the gas usually contains a large amount of impurities, dust, moisture and harmful chemical substances. Ordinary single-stage treatment equipment is difficult to remove these pollutants comprehensively and efficiently. For example, some simple filter devices cannot effectively separate small dust particles. Some single adsorption equipment cannot deal with acidic or alkaline harmful components in the gas. At the same time, the previous gas purification device is of a dispersed layout, which occupies a large area of the factory and is not conducive to intensive production. In the traditional dynamic adsorption equipment, the position of the adsorbent is fixed. As the use time increases, the performance of the adsorbent decreases significantly, which cannot guarantee the continuous and efficient drying and adsorption treatment of the gas. The above shortcomings result in that the gas generated in the boron trioxide crystallization process is difficult to meet the emission standard, which seriously pollutes the atmospheric environment. SUMMARY

[0003] The present application provides a gas purification treatment device for boron trioxide crystallization process, which mainly aims to solve the technical problems that the gas generated in the boron trioxide crystallization process is high-temperature and high-humidity and contains a large amount of impurities, dust and harmful chemical substances. Due to the simple traditional treatment method, the high temperature affects the subsequent treatment effect, the single-stage equipment is difficult to purify comprehensively and efficiently, the factory occupies a large area, the performance of the adsorbent is prone to decrease, which results in that the gas is difficult to meet the emission standard and pollutes the environment.

[0004] To achieve the above-mentioned purpose, the present application provides a gas purification treatment device for boron trioxide crystallization process, which comprises: a gas cooling device for receiving high-temperature gas generated in the boron trioxide 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 top of the cyclone dust removal device; and a chemical spraying neutralization tower fixedly arranged at the top of the electrostatic dust removal device, for spraying a chemical neutralizing agent into the passing gas. The cyclone dust removal device, the electrostatic dust removal device and the chemical spraying neutralization tower are arranged in layers from bottom to top. The dynamic adsorption device is provided with a dynamic adsorbent capable of entering the gas output end of the cyclone dust removal device. The position of the dynamic adsorbent is not fixedly arranged.

[0005] In an embodiment, the gas cooling device is provided with a liquid cooling circulation medium pipeline, two ends of the pipeline are connected to one end of the first and second circulation heat exchange pipes, and the other ends of the first and second circulation heat exchange pipes are connected to the dynamic adsorption device to provide heat to the dynamic adsorption device to realize drying treatment of the dynamic adsorbent.

[0006] In an embodiment, the cyclone dust removal device comprises a dust removal shell, the lower half of the dust removal shell is gradually tapered, and the inner diameter gradually decreases from top to bottom to form a spiral airflow; a dynamic back suction cylinder is rotatably arranged in the inner cavity of the dust removal shell, the middle part of the dynamic back suction cylinder is hollow to output gas upward; a fixed frame is fixedly supported at the bottom end of the dynamic back suction cylinder, and the dynamic back suction cylinder can rotate in the fixed frame; a linkage component is transmissionally connected to one end of the outer wall of the dynamic back suction cylinder and transmissionally connected to the other end of the dynamic adsorption device to realize synchronous movement of the dynamic back suction cylinder and the dynamic adsorbent; and an umbrella-shaped flow uniformizing plate is fixedly arranged in the inner cavity of the upper half of the cyclone dust removal device, and the umbrella-shaped flow uniformizing plate is opposite to the top opening position of the dynamic back suction cylinder.

[0007] In an embodiment, the linkage component comprises a variable speed gearbox fixedly arranged in the inner cavity of the upper half of the dust removal shell; a transmission assembly is transmissionally connected to one end of the power output end of the variable speed gearbox, and the other end of the transmission assembly is transmissionally connected to the dynamic adsorption device; and a driving transmission member is located in the inner cavity of the upper half of the dust removal shell and fixedly sleeved on the outer wall of the dynamic back suction cylinder, and the driving transmission member is connected to the power input end of the variable speed gearbox.

[0008] In an embodiment, the dynamic adsorption device comprises a columnar shell arranged on one side of the electrostatic dust removal device, and further comprises a fan fixedly arranged at the top end of the inner cavity of the columnar shell, a heat exchange cavity arranged at the upper part and the middle part of the columnar shell, the cross-sectional area of the lower half of the cavity being smaller than that of the upper half, a spiral heat exchange fin arranged in the lower half of the cavity of the heat exchange cavity to prolong the airflow path, a diffusion cavity arranged in the bottom inner cavity of the columnar shell, an arc-shaped flow uniformizing plate fixedly installed at the middle part of the diffusion cavity, the arc-shaped flow uniformizing plate being provided with a plurality of through holes, the diameters of the through holes gradually decreasing from inside to outside, the arc-shaped flow uniformizing plate being located directly above the dynamic adsorbent, and a moisture absorption interception box being detachably arranged below the dynamic adsorbent and corresponding to the position of the arc-shaped flow uniformizing plate.

[0009] In an embodiment, the dynamic adsorbent is fixed on the outer wall of the external rotating rod, the dynamic adsorbent comprises an activated carbon layer and a desiccant layer, the desiccant layer is below the activated carbon layer, a shaped dustproof mesh sleeve is arranged on the outer wall of the desiccant layer and the activated carbon layer, and a maintenance door which can be opened and closed is arranged on the surface of the cylindrical shell.

[0010] In an embodiment, the electrostatic dust removal device comprises a plurality of dust collection electrodes which are longitudinally spaced and arranged in the inner cavity of the electrostatic dust removal device, and a plurality of corona electrodes which are regular polygons and are fixedly sleeved on the outer side of the dust collection electrodes.

[0011] In an embodiment, the chemical spray neutralization tower comprises a spray tower and a spray frame inside the spray tower, and further comprises: an umbrella-shaped intercepting plate which is fixedly arranged at the bottom end of the inner cavity of the spray tower; a gas supply frame which is fixedly connected to the top end of the umbrella-shaped intercepting plate and is connected to the gas flow output end of the electrostatic dust removal device; a plurality of gas supply nozzles which are arranged above the umbrella-shaped intercepting plate at equal intervals and are all connected to the gas supply frame, and each gas supply nozzle has a downward gas spraying angle; a liquid discharge pipe which is connected to the spray tower body and is located above the umbrella-shaped intercepting plate; and an exhaust pipe which is connected to the spray tower body at the upper part of the spray frame and is used for outputting the treated gas.

[0012] In an embodiment, the dynamic back suction cylinder is provided with: an outer cylinder which is rotatably arranged in the middle part of the inner cavity of the dust removal shell; and a plurality of force receiving fan blades which are all arranged on the outer wall of the outer cylinder and correspond to the gas inlet position of the outer cylinder.

[0013] In an embodiment, the dynamic back suction cylinder is further provided with: an inner lifting cylinder which is movably arranged on the inner side of the outer cylinder and is attached to the inner wall of the outer cylinder, and a threaded block is further arranged on the outer wall of the inner lifting cylinder; an adjusting screw which is movably arranged on the outer cylinder and penetrates through the threaded block; a plurality of gears which are fixedly installed on the rotating shaft of each force receiving fan blade, and the gears are located in the inner cavity of the outer cylinder; and a plurality of racks which are fixedly installed on the outer wall of the inner lifting cylinder, the racks correspond to the gears one by one and are in meshing connection.

[0014] The application provides a boron anhydride crystallization process gas purification treatment device, in terms of temperature control, the gas cooling equipment adopts heat exchange means to reduce the high-temperature gas temperature to a suitable range, effectively avoiding the adverse effects of high temperature on subsequent cyclone separation, electrostatic adsorption and chemical spraying links, improving the purification efficiency of each stage, and reducing the incomplete purification caused by temperature problems; in terms of dust and impurity removal, the cyclone dust removal equipment uses centrifugal force to realize preliminary dust removal, can efficiently separate solid particles with large mass, and greatly reduces the subsequent treatment burden; the electrostatic dust removal equipment successfully removes fine dust particles based on the principle of electrostatic adsorption, makes up for the deficiency that mechanical methods cannot capture small particles, and significantly improves the removal capacity of dust with different particle sizes compared with traditional single-stage dust removal equipment; in terms of gas drying and adsorption of small molecular impurities, the dynamic adsorbent in the dynamic adsorption equipment dries the gas and adsorbs water vapor and small molecular impurities by virtue of the porous structure and chemical activity, keeps the performance in a good state, helps to maintain the cleanliness of the electrode of the electrostatic dust removal equipment, avoids the influence of dust on the purification effect caused by the closure of the electrode; in terms of acid-base neutralization purification, the chemical spraying neutralization tower converts the residual acidic or alkaline harmful components in the gas into harmless substances by chemical reaction, realizes deep purification of the gas, guarantees that the gas meets the discharge standard, reduces the pollution to the atmospheric environment, provides clean gas conditions for subsequent related process links, optimizes the treatment process of the boron anhydride production tail gas, and protects the ecological environment; in addition, the multiple equipment is arranged in a top-down stacked manner, greatly reduces the occupied area of the factory, realizes intensive production, and effectively saves land resources. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structure schematic view of the boron anhydride crystallization process gas purification treatment device provided by the embodiment of the application is shown from a first angle;

[0016] Figure 2 A structure schematic view of the boron anhydride crystallization process gas purification treatment device provided by the embodiment of the application is shown from a second angle;

[0017] Figure 3 A structure schematic view of the electrostatic dust removal equipment provided by the embodiment of the application is shown;

[0018] Figure 4 A structure schematic view of the chemical spraying neutralization tower provided by the embodiment of the application is shown;

[0019] Figure 5 A structure schematic view of the dynamic adsorption equipment provided by the embodiment of the application is shown;

[0020] Figure 6 A three-dimensional cross-sectional structure schematic view of the cyclone dust removal equipment provided by the embodiment of the application is shown;

[0021] Figure 7 A structure schematic view of theFigure 6 A local enlarged structure schematic view in A of FIG. 1;

[0022] Figure 8 A structure schematic view of the umbrella-shaped current uniforming plate is shown;

[0023] Figure 9 A structure schematic view of the adjusting screw is shown;

[0024] Figure 10 A structure schematic view of the screw block is shown;

[0025] Figure 11 A structure schematic view of Figure 10 A local enlarged structure schematic view in B of FIG. 1.

[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 circulating heat exchange pipe, 12, second circulating heat exchange pipe, 21, dust removal shell, 22, dynamic back suction cylinder, 23, fixed frame, 24, variable speed gear box, 25, transmission assembly, 26, driving transmission part, 27, umbrella-shaped current uniforming plate, 31, fan, 32, heat exchange cavity, 33, spiral heat exchange sheet, 34, diffusion cavity, 35, arc-shaped current uniforming plate, 36, dynamic adsorbent, 361, activated carbon, 362, drying agent, 37, moisture absorption interception box, 38, external rotating rod, 41, dust collection electrode, 42, corona electrode, 51, spray frame, 52, umbrella-shaped interception plate, 53, gas feeding frame, 54, gas feeding nozzle, 55, liquid discharge pipe, 56, gas discharge pipe, 221, outer cylinder, 222, force fan blade, 223, adjusting screw, 224, inner lifting cylinder, 225, screw block, 226, gear, 227, rack. DETAILED DESCRIPTION

[0027] In order to better understand the technical solutions provided by the embodiments of the present specification, the technical solutions of the embodiments of the present specification will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present specification and the embodiments are detailed descriptions of the technical solutions of the embodiments of the present specification, and not limitations of the technical solutions of the present specification. In the case of no conflict, the technical features in the embodiments of the present specification and the embodiments can be combined with each other.

[0028] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0029] In this technology, boric acid is used as a raw material, and boric anhydride is prepared by heating and decomposing it. Boric acid undergoes a decomposition reaction when heated to a certain temperature. The heating process requires a relatively high temperature, typically around 300-400℃, which results in a high temperature in the generated gas. Simultaneously, the large amount of water vapor produced during decomposition gives the gas high humidity. In industrial production, to ensure complete decomposition of boric acid, pyrolysis reactions are often carried out at higher temperatures, resulting in gases that not only contain a large amount of water vapor but also have a high temperature.

[0030] Please see Figures 1 to 11 As shown in the embodiment of this application, a gas purification and treatment device for the boron anhydride crystallization process is provided, which can effectively treat undesirable components emitted into the atmospheric environment and protect the atmospheric environment. This device specifically includes: a gas cooling device 10, a cyclone dust collector 20, a dynamic adsorption device 30, an electrostatic dust collector 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 boron anhydride crystallization process; the cyclone dust collector 20 is connected to the gas output end of the gas cooling device 10; the dynamic adsorption device 30 is installed on the gas output end at the top of the cyclone dust collector 20 and is used to dry and adsorb the gas passing through it; the electrostatic dust collector 40 is fixed on the gas output end at the top of the cyclone dust collector 20; and the chemical spray neutralization tower 50 is fixedly installed on the top of the electrostatic dust collector 40 and is used to spray a chemical neutralizing agent into the passing gas.

[0032] The cyclone dust collector 20, the electrostatic dust collector 40, and the chemical spray neutralization tower 50 are arranged in layers from bottom to top, which occupies a small area of ​​the plant. The dynamic adsorption device 30 is equipped with a dynamic adsorbent 36 that can enter the gas output end of the cyclone dust collector 20. The position of the dynamic adsorbent 36 changes constantly to ensure that the performance of the dynamic adsorbent 36 is in a good state.

[0033] The gas purification treatment device for the crystallization process of boron trioxide has a multi-stage treatment process. First, the gas cooling device 10 receives the high-temperature gas generated in the crystallization process of boron trioxide. 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 gas from being not completely purified due to the high temperature of the chemical spray inside, which will cause electrostatic adsorption. Through the cooling means of heat exchange, the temperature of the gas is reduced to a range suitable for subsequent treatment. Then, the cyclone dust removal device 20 is connected to the gas output end of the gas cooling device 10 by the principle of centrifugal force. When the gas rotates at high speed, the solid particles with large mass are thrown to the wall under the action of centrifugal force and fall into the ash bucket along the wall, realizing preliminary dust removal. The dynamic adsorbent 36 in the dynamic adsorption device 30 is always rotating and always has part in the working area, which can fully contact with the gas. By virtue of the porous structure and chemical activity of the adsorbent, the passing gas is dried and the water vapor and part of the small molecular impurities are adsorbed, ensuring further purification of the gas and helping the gas entering the electrostatic dust removal device 40 to be in a reasonable dryness degree, avoiding the situation that dust closes the electrode. Subsequently, the electrostatic dust removal device 40 is fixed on the gas output end of the dynamic adsorption device 30. Based on the principle of electrostatic adsorption, the fine dust particles in the gas are charged and move directionally under the action of the electric field and are adsorbed on the electrode, removing those extremely fine and difficult to capture by mechanical means. The chemical spray neutralization tower 50 is fixedly arranged at the top of the electrostatic dust removal device 40 and sprays chemical neutralizing agent into the passing gas, which converts the residual acidic or alkaline harmful components in the gas into harmless substances by chemical reaction, such as generating salt and water from acidic gas. Through this series of progressive purification treatment, impurities, dust, moisture and harmful chemical substances in the gas of the boron trioxide crystallization process can be effectively removed, ensuring that the gas meets the emission standard, reducing the pollution to the environment, and at the same time providing clean gas conditions for the subsequent related process links, improving the gas treatment effect of the entire boron trioxide production process.

[0034] As shown in Figure 1 and Figure 2 in some examples, further, the gas cooling device 10 is provided with a liquid cooling circulating medium pipeline. The two ends of the liquid cooling circulating medium pipeline are connected to one end of the first circulating heat exchange pipe 11 and the second circulating heat exchange pipe 12 respectively, and the other end of the first circulating heat exchange pipe 11 and the second circulating heat exchange pipe 12 is connected to the dynamic adsorption device 30, which is used to provide heat to the dynamic adsorption device 30 to realize the drying treatment of the dynamic adsorbent 36.

[0035] In the present example, when the high-temperature gas flows into the gas cooling device 10, the liquid cooling circulating medium flows in the pipeline, and rapidly absorbs the heat of the gas by the principle of heat conduction, thereby achieving the preliminary cooling of the gas. At the same time, the two ends of the liquid circulating medium pipeline are connected to the first circulating heat exchange pipe 11 and the second circulating heat exchange pipe 12, respectively, and the other ends of the first circulating heat exchange pipe 11 and the second circulating heat exchange pipe 12 are connected to the dynamic adsorption device 30. When the dynamic adsorbent 36 tends to be humid after adsorbing a large amount of water vapor and impurities, which may affect the adsorption efficiency, the circulating heat exchange pipe carries the heat medium into the dynamic adsorption device 30, and the circulating power is the water pump arranged in the gas cooling device. The medium flows into the dynamic adsorption device 30, reduces the temperature after heat release, and then flows back to the gas cooling device to reduce the temperature of the gas entering the device. Based on heat transfer, the temperature of the dynamic adsorbent 36 is increased, the water vapor is evaporated and separated from the surface of the adsorbent under the action of heat, and the drying treatment of the dynamic adsorbent 36 is successfully realized. This not only maintains the high adsorption performance of the dynamic adsorbent 36, ensures its continuous and efficient removal of water vapor and small molecular impurities in the gas, but also ingeniously utilizes the heat collected during the gas cooling process, forms an internal heat recycling energy-saving system, further optimizes the entire gas purification treatment process, and improves the stability, efficiency and economy of the device operation.

[0036] As shown in Figures 6 to 11 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 uniformizing plate 27. The lower half of the dust removal shell 21 is gradually changed in diameter, and the inner cavity diameter gradually decreases from top to bottom, for forming a spiral airflow. The dynamic back-suction cylinder 22 is 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, for outputting 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 is rotatable in the fixed frame 23. One end of the linkage component is transmissionally connected to the outer wall of the dynamic back-suction cylinder 22, and the other end is transmissionally connected to the dynamic adsorption device 30, for realizing the synchronous movement of the dynamic back-suction cylinder 22 and the dynamic adsorbent 36. The umbrella-shaped flow uniformizing 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 uniformizing plate 27 is opposite to the top opening position of the dynamic back-suction cylinder 22.

[0037] In the present example, the specific structure of the cyclone dust removal device 20 is further provided, wherein the lower half of the dust removal shell 21 adopts a diameter gradient structure, the inner cavity diameter gradually decreases from top to bottom, according to the principle of centrifugal force and airflow movement, when the dust-containing gas enters, the contraction of space promotes the rotation of gas to accelerate, forming a stable and strong spiral airflow, allowing dust particles to efficiently gather to the shell wall under the action of centrifugal force; the dynamic back suction cylinder 22 is rotatably arranged in the inner cavity of the dust removal shell 21, the hollow design in the middle is used to output the preliminarily purified gas upwards, ensuring that the cleaned airflow correctly enters the next processing link; the fixed frame 23 provides stable support for the dynamic back suction cylinder 22, ensuring that it can rotate flexibly at the bottom end; one end of the linkage component is in transmission connection with the outer wall of the dynamic back suction cylinder 22, and the other end is in butt joint with the dynamic adsorption device 30, by virtue of the linkage mechanism setting, the synchronous movement of the dynamic back suction cylinder 22 and the dynamic adsorbent 36 is realized, so that the flow rhythm of the gas in the cyclone dust removal and subsequent adsorption process is matched, for example, when the gas enters too fast, it can drive the dynamic back suction cylinder 22 to rotate efficiently, at this time the performance of the dynamic adsorbent 36 also needs to be improved, through the setting of the linkage component, 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 uniformizing plate 27 is fixed in the inner cavity of the upper half of the cyclone dust removal device 20, opposite to the top opening position of the dynamic back suction cylinder 22, through the umbrella-shaped flow uniformizing plate 27, the entering airflow can be effectively dispersed, the flow rate and flow volume are uniformly distributed, avoiding local airflow impact to cause incomplete purification or turbulence to affect the subsequent process, and the dust removal efficiency of the cyclone dust removal device 20 is comprehensively improved.

[0038] As Figures 6 to 8 further described in some examples, the linkage component further includes: a variable speed gearbox 24, a transmission assembly 25 and a driving transmission member 26, the variable speed gearbox 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 in transmission connection with the power output end of the variable speed gearbox 24, the other end of the transmission assembly 25 is in transmission connection with the dynamic adsorption device 30; the driving transmission member 26 is located in the inner cavity of the upper half of the dust removal shell 21 and is fixedly sleeved on the outer wall of the dynamic back suction cylinder 22, the driving transmission member 26 is connected with the power input end of the variable speed gearbox 24.

[0039] In the present example, the transmission structure of the linkage component is further clarified, wherein the variable gear box 24 serves as the core control unit and is fixedly arranged in the inner cavity of the upper half of the dust removal shell 21, for synchronously transmitting the rotational kinetic energy of the dynamic return suction cylinder 22 to the external rotating rod 38 in the dynamic adsorption device 30, and driving the dynamic adsorbent 36 to rotate by driving the rotation of the external rotating rod 38, so as to keep the real-time variation of the dynamic adsorbent 36 area entering the dust removal shell 21. The driving part 26 is located in the same inner cavity space, for example, a gear is firmly sleeved on the outer wall of the dynamic return suction cylinder 22, which is directly connected with the power input end of the variable gear box 24, so that when the dynamic return suction cylinder 22 rotates under the action of air flow or other external force, the power can be transmitted to the variable gear box 24 in time. The transmission assembly 25 is tightly connected with the power output end of the variable gear box 24 at one end and precisely docks with the dynamic adsorption device 30 at the other end, and the low-speed rotating power with strong torque after reasonable speed regulation by the variable gear box 24 is transmitted to the dynamic adsorption device 30 through the reliable mechanical transmission relationship, so as to ensure that the dynamic return suction cylinder 22 and the dynamic adsorbent 36 realize stable and synchronous motion. Not only can it ensure the smooth transition of the gas in the two key links of cyclone dust removal and dynamic adsorption, optimize the continuity 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 realize the high-quality purification treatment effect of the gas generated in the boron oxide crystallization process.

[0040] As shown in Figure 5 and Figure 6 In some examples, the dynamic adsorption device 30 further includes a cylindrical shell arranged on one side of the electrostatic dust removal device 40, and further includes: a fan 31, a heat exchange cavity 32, a spiral heat exchange sheet 33, a diffusion cavity 34, an arc-shaped flow uniformizing plate 35, and a moisture absorption and interception box 37. The fan 31 is fixedly arranged at the top end of the inner cavity of the cylindrical shell; the heat exchange cavity 32 is arranged at the upper part and the middle part of the cylindrical shell, and the cross-sectional area of the lower half of the heat exchange cavity 32 is smaller than that of the upper half; the spiral heat exchange sheet 33 is arranged in the lower half of the heat exchange cavity 32, for prolonging the airflow path; the diffusion cavity 34 is arranged in the bottom inner cavity of the cylindrical shell; the arc-shaped flow uniformizing plate 35 is fixedly arranged at the middle part of the diffusion cavity 34, and a plurality of through holes are formed in the arc-shaped flow uniformizing plate 35, the diameters of the through holes gradually decrease from the center to the periphery, and the arc-shaped flow uniformizing plate 35 is located directly above the dynamic adsorbent 36; and the moisture absorption and interception box 37 is detachably arranged below the dynamic adsorbent 36 and corresponds to the position of the arc-shaped flow uniformizing plate 35.

[0041] In the present example, the dynamic adsorption link of the boron anhydride crystallization process gas purification treatment device is provided, and the components of the dynamic adsorption equipment 30 complement each other. Specifically, the cylindrical shell serves as the external infrastructure, which is arranged at the side of the electrostatic precipitation equipment 40. The fan 31 is fixedly arranged at the top of the inner cavity of the cylindrical shell, and after being started, it strongly blows air into the cylindrical shell, promotes the accelerated flow of the gas, and ensures that there is enough gas flow rate and flow to supply when the subsequent dynamic adsorbent 36 performance (such as the degree of dryness) is restored. The heat exchange cavity 32 is distributed in the upper and middle parts of the cylindrical shell, and the cross-sectional area of the lower half of the cavity is smaller than that of the upper half. In this way, in cooperation with the spiral heat exchange sheet 33 therein, when the gas flows through, the airflow exchanges heat with the medium in the internal passage of the spiral heat exchange sheet 33, the temperature of the medium is lowered, and the temperature of the airflow is raised. The medium with lowered temperature is again transported back to the gas cooling equipment 10, so that through the spiral heat exchange sheet 33, on the one hand, the heat exchange is realized by utilizing the temperature difference to adjust the gas temperature for adsorption, and on the other hand, the spiral heat exchange sheet 33 prolongs the airflow path, so that the gas fully contacts the wall of the heat exchange cavity 32, and the heat exchange efficiency is improved. The diffusion cavity 34 is arranged in the bottom inner cavity of the cylindrical shell, which plays a role in buffering and uniformly distributing the airflow, and avoids uneven adsorption caused by airflow impact. The arc-shaped flow distribution plate 35 is fixedly arranged in the middle part of the diffusion cavity 34, the through hole in the middle part is larger than that in the edge part, the through hole gradually becomes smaller from the inside to the outside, which can adjust the distribution of the passing airflow, so that the gas flowing above is uniformly dispersed to the surface of the dynamic adsorbent 36, and the consistency of the treatment effect of the airflow on the dynamic adsorbent 36 in different positions is ensured. The moisture absorption and interception box 37 is detachably arranged below the dynamic adsorbent 36, which corresponds to the position of the arc-shaped flow distribution plate 35. It can not only intercept the liquid water or impurities (such as a small amount of impurities that cannot be captured from the cyclone dust removal equipment 20) falling during the adsorption process to prevent secondary pollution, but also facilitate regular cleaning and maintenance, so as to ensure the continuous high-performance operation of the dynamic adsorption equipment 30 and comprehensively improve the gas drying and adsorption impurity removal capability.

[0042] As shown in Figure 5 and Figure 6 , in some examples, further, the dynamic adsorbent 36 is fixed on the external rotating rod 38 and can rotate with the external rotating rod 38, including the activated carbon 361 layer and the desiccant 362 layer, the desiccant 362 layer is below the activated carbon 361 layer, and the desiccant 362 layer and the activated carbon 361 layer are provided with a shaped dustproof net cover on the outer wall. The surface of the cylindrical shell is also provided with an openable and closable maintenance door.

[0043] In the present example, the activated carbon 361 layer is located above, with its porous structure and large surface area, it has a strong adsorption capacity for organic impurities, odor molecules and other impurities in the gas, which can effectively purify the gas composition and improve the purity of the gas. The desiccant 362 layer is below the activated carbon 361 layer, which is focused on capturing water vapor in the gas to ensure that the dryness of the gas meets the requirements of the subsequent electrostatic precipitation process. The two complement each other to achieve dual removal of gas impurities and moisture. The shaped dustproof net sleeve provided on the outer wall of the desiccant 362 layer and the activated carbon 361 layer can prevent external dust and impurities from mixing during the adsorption process, avoid interfering with the performance of the adsorbent, and ensure that the adsorbent maintains its structure during dynamic operation without falling apart. The openable maintenance door provided on the surface of the cylindrical shell provides convenient and secure long-term stable operation of the entire dynamic adsorption equipment 30. The operator can conveniently open the maintenance door to regularly check the usage status of the adsorbent, replace the aged or failed adsorbent, and clean the impurities that may accumulate inside the equipment, greatly reducing the difficulty of equipment operation and maintenance, extending the service life of the equipment, and continuously providing efficient service for the purification of boron trioxide crystallization gas.

[0044] As shown in Figure 3 In some examples, further, the electrostatic precipitation equipment 40 includes: a plurality of dust collection electrodes 41 and a plurality of corona electrodes 42, the plurality of dust collection electrodes 41 are longitudinally spaced apart in the inner cavity of the electrostatic precipitation equipment 40; and the plurality of corona electrodes 42 are regular polygons, each of the plurality of corona electrodes 42 is fixedly sleeved outside one of the plurality of dust collection electrodes 41.

[0045] In the present example, the plurality of dust collection electrodes 41 of the electrostatic precipitation equipment 40 are longitudinally spaced apart in the inner cavity, leaving reasonable space for gas flow, so that the dust-containing gas can flow smoothly; when the gas flows through, the dust collection electrode 41 plays a capture role, attracting charged dust particles in the gas to adhere to the surface by virtue of its own charge, achieving the preliminary dust removal effect; the corona electrode 42 is a regular polygon, and each of the plurality of corona electrodes 42 is fixedly sleeved outside one of the plurality of dust collection electrodes 41; on the one hand, the regular polygon corona electrode 42 can more uniformly release corona to the surrounding space, forming a stable and high-strength electric field to drive the tiny dust particles in the gas to be quickly charged; on the other hand, the structure of the corona electrode 42 sleeved outside the dust collection electrode 41 allows the corona electrode 42 to closely cooperate with the dust collection electrode 41, strengthening the range and strength of the electric field, so that the dust particles move and adsorb more accurately and efficiently toward the dust collection electrode 41 under the driving of the electric field force, improving the removal ability of the electrostatic precipitation equipment 40 for fine dust particles.

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

[0047] The chemical spray neutralization tower 50 further includes: an umbrella-shaped intercepting plate 52, a gas supply shelf 53, a plurality of gas supply nozzles 54, a liquid discharge 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 gas supply shelf 53 is fixedly connected to the top end of the umbrella-shaped intercepting plate 52 and is in communication with the gas flow output end of the electrostatic precipitation equipment 40; for example, the gas supply shelf 53 has an inner cavity, the inner cavity of the gas supply shelf 53 is in communication with the gas flow output end of the electrostatic precipitation equipment 40, the plurality of gas supply nozzles 54 are arranged at equal intervals above the umbrella-shaped intercepting plate 52 and are in communication with the gas supply shelf 53, and the gas supply angle of each gas supply nozzle 54 is downward; the liquid discharge pipe 55 is connected to the spray tower body and is located above the umbrella-shaped intercepting plate 52; and the exhaust pipe 56 is connected to the upper part of the spray shelf 51 and the spray tower body, and is used to output the treated gas.

[0048] In the chemical spray neutralization process of the boron oxide crystallization process gas in the present example, the chemical spray neutralization tower 50 is the final procedure for gas purification. The spray tower is the main container. The spray shelf 51 is located at the top of the spray tower and is responsible for uniformly spraying the chemical neutralizing agent. The umbrella-shaped intercepting plate 52 is fixedly arranged at the bottom end of the inner cavity of the spray tower, which plays a role in water flow interception and diversion, separates the electrostatic precipitation equipment 40 from the chemical spray neutralization tower 50, prevents moisture from entering the electrostatic precipitation equipment 40, and changes the direction of the gas flow when the gas flow from the electrostatic precipitation equipment 40 flows into the chemical spray neutralization tower 50 at high speed. The umbrella-shaped intercepting plate 52 cooperates with the gas supply shelf 53. The gas supply shelf 53 is fixedly connected to the top end of the umbrella-shaped intercepting plate 52, and the internal passage of the gas supply shelf 53 is in communication with the gas flow output end of the electrostatic precipitation equipment 40, which ensures the smooth introduction of the gas. The plurality of gas supply nozzles 54 are arranged at equal intervals above the umbrella-shaped intercepting plate 52 and are in communication with the gas supply shelf 53, and the gas supply angle is downward, so that the entering gas is in full contact with the neutralizing agent sprayed from above, greatly increasing the gas-liquid contact area and contact time, and improving the neutralization reaction efficiency. On the other hand, by arranging the gas supply nozzles 54 downward, the spray liquid from above is prevented from entering the gas supply nozzles 54, effectively preventing the spray liquid from leaking, the liquid discharge pipe 55 is connected to the spray tower body and is located between the umbrella-shaped intercepting plate 52 and the gas supply shelf 53, which can timely discharge the waste liquid generated by the reaction, preventing the accumulation of liquid from affecting the subsequent operation. The exhaust pipe 56 is connected to the upper part of the spray shelf 51 and the spray tower body, and is used to output the clean gas after full neutralization treatment. After the gas produced in the boron oxide crystallization process is treated in multiple stages and multiple links, it is discharged in accordance with the standard.

[0049] As Figure 6 ,Figure 8 , Figure 9 and Figure 10 As shown, in some examples, the dynamic back suction cylinder 22 is further provided with an outer cylinder 221 and multiple force-bearing fan blades 222. The outer cylinder 221 is rotatably disposed in the middle of the inner cavity of the dust removal housing 21. The multiple force-bearing fan blades 222 are disposed 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 mounted in the middle of the inner cavity of the dust collector housing 21, which is different from the fixed setting 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. Multiple force-bearing fan blades 222 are evenly arranged on the outer wall of the outer cylinder 221 and precisely correspond to the air inlet position of the outer cylinder 221. When the dust-laden gas rushes into the dust collector housing 21 at high speed, the gas first impacts the force-bearing 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 inclined or arc-shaped setting of the fan blades, the gas entering the dust collector housing 21 can be guided to quickly change direction, quickly realize the spiral airflow, thereby enhancing the separation effect of centrifugal force on dust particles and allowing dust to gather more efficiently on the outer wall.

[0051] like Figures 9 to 11 As shown, in some examples, the dynamic suction cylinder 22 is further provided with: an adjusting screw 223, an inner lifting cylinder 224, multiple gears 226, and multiple racks 227. The inner lifting cylinder 224 is movable and positioned inside the outer cylinder 221, and fits against the inner wall of the outer cylinder 221. A threaded block 225 is also provided on the outer wall of the inner lifting cylinder 224. The adjusting screw 223 is movably mounted 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. Multiple gears 226 are fixedly installed one-to-one on the rotating shaft of each force-bearing fan blade 222. The gears 226 are located in the inner cavity of the outer cylinder 221. Multiple racks 227 are fixedly installed on the outer wall of the inner lifting cylinder 224. The racks 227 correspond one-to-one with the gears 226 and are meshed together.

[0052] In the present example, the inner lifting cylinder 224 is movably attached to the inner wall of the outer cylinder 221, and the outer wall threaded block 225 cooperates with the movable through adjusting screw 223. The operator can accurately control the lifting position of the inner lifting cylinder 224 by rotating the adjusting screw 223. When the water vapor content in the gas flow is low or high, even if the flow value is the same, the water vapor will affect the subsequent dynamic adsorption link differently, in order to ensure the best purification effect, it is necessary to adapt to the specific dynamic adsorbent 36 switching speed, which requires to increase the rotating speed of the dynamic back adsorption cylinder 22. At this time, the gear 226 fixed on the rotating shaft of the stress fan blade 222 is located in the inner cavity of the outer cylinder 221, and is meshed and connected with the rack 227 fixed on the outer wall of the inner lifting cylinder 224. The rotating shaft of the stress fan blade 222 cooperates with the mounting hole opened on the outer cylinder 221 to ensure that the up and down position of the stress fan blade 222 does not change. With the lifting of the inner lifting cylinder 224, the rack 227 drives the gear 226 to rotate, and then changes the angle of the stress fan blade 222. According to the principle of fluid mechanics, the adjustment of the angle of the stress fan blade 222 will change the impact force conversion efficiency of the gas on the fan blade, so as to flexibly control the rotating speed of the outer cylinder 221, realize the self-adaptive rotation of the dynamic back adsorption cylinder 22 according to different gas working conditions, and ensure that the dynamic adsorbent 36 provides the right gas conveying rhythm, greatly improves the response ability of the whole device to complex gas working conditions, and ensures the stable and efficient operation of the boron suboxide crystallization gas purification process.

[0053] The above is only an embodiment of the present application and is not used to limit the present application. The present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A device for purifying a process gas in a crystallization of boron trioxide, characterized in that The application relates to a gas cooling device (10) for receiving high-temperature gas generated in a boron trioxide 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) arranged on a gas output end at a top end of the cyclone dust removal device (20) and used for drying and adsorbing treatment of the gas passing through the inside, an electrostatic dust removal device (40) fixed on a gas output end at an upper end of the cyclone dust removal device (20), a chemical spray neutralization tower (50) fixedly arranged at a top end of the electrostatic dust removal device (40) and used for spraying a chemical neutralizing agent into the passing gas, wherein the cyclone dust removal device (20), the electrostatic dust removal device (40) and the chemical spray neutralization tower (50) are arranged in a stack from bottom to top, the dynamic adsorption device (30) is provided with a dynamic adsorbent (36) capable of entering the gas output end of the cyclone dust removal device (20), and the position of the dynamic adsorbent (36) is non-fixedly arranged. The gas cooling device (10) is internally provided with a liquid cooling circulating medium pipeline, two ends of the liquid cooling circulating medium pipeline are respectively connected to one end of a first circulating heat exchange pipe (11) and a second circulating heat exchange pipe (12), and the other end of the first circulating heat exchange pipe (11) and the second circulating heat exchange pipe (12) is connected to the dynamic adsorption device (30) and used for providing heat to the dynamic adsorption device (30) to realize drying treatment of the dynamic adsorbent (36). The cyclone dust removal device (20) comprises a dust removal shell (21), a lower half of the dust removal shell (21) is gradually changed in diameter, and the diameter of an inner cavity of the dust removal shell (21) gradually decreases from top to bottom, so as to form a spiral airflow, a dynamic back suction cylinder (22) is rotatably arranged in the inner cavity of the dust removal shell (21), a middle part of the dynamic back suction cylinder (22) is hollow, and the dynamic back suction cylinder (22) is used for outputting gas upwards, a fixed support (23) is fixedly supported at a bottom end of the dynamic back suction cylinder (22), the dynamic back suction cylinder (22) can rotate in the fixed support (23), a linkage component is transmissionally connected to an outer wall of the dynamic back suction cylinder (22) at one end and transmissionally connected to the dynamic adsorption device (30) at the other end, so as to realize synchronous movement of the dynamic back suction cylinder (22) and the dynamic adsorbent (36), and an umbrella-shaped flow uniformizing plate (27) is fixedly arranged in an inner cavity of an upper half of the cyclone dust removal device (20) and faces the top opening position of the dynamic back suction cylinder (22). The linkage component comprises a variable speed gearbox (24) fixedly arranged in an inner cavity of an upper half of the dust removal shell (21), a transmission assembly (25) transmissionally connected to a power output end of the variable speed gearbox (24) at one end and transmissionally connected to the dynamic adsorption device (30) at the other end, and a driving transmission member (26) located in the inner cavity of the upper half of the dust removal shell (21) and fixedly sleeved on the outer wall of the dynamic back suction cylinder (22), and the driving transmission member (26) is connected to a power input end of the variable speed gearbox (24). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The boron anhydride crystallization process gas purification treatment apparatus according to claim 1, characterized by: ​ ​ ​ ​ 3. The apparatus for purifying process gas of boron oxide crystallization process according to claim 1, wherein: The dynamic adsorption equipment (30) comprises a columnar shell arranged on one side of the electrostatic dust collector (40), and further comprises: a fan (31) fixedly arranged at the top of the inner cavity of the columnar shell; a heat exchange cavity (32) arranged at the upper and middle portions of the columnar shell, wherein the cross-sectional area of the lower half of the heat exchange cavity (32) is smaller than that of the upper half; a spiral heat exchange sheet (33) arranged in the lower half of the heat exchange cavity (32) and used for prolonging the airflow passing path; a diffusion cavity (34) arranged in the bottom inner cavity of the columnar shell; an arc-shaped flow uniformizing plate (35) fixedly arranged at the middle portion of the diffusion cavity (34), wherein a plurality of through holes are arranged in the arc-shaped flow uniformizing plate (35), the diameters of the through holes gradually decrease from inside to outside, and the arc-shaped flow uniformizing plate (35) is located directly above the dynamic adsorbent (36); a moisture absorption and interception box (37) arranged below the dynamic adsorbent (36) and corresponding to the position of the arc-shaped flow uniformizing plate (35).

4. The boron oxide crystallization process gas purification treatment device according to claim 3, characterized in that: the dynamic adsorbent (36) is fixed to the outer wall of an external rotating rod (38), the dynamic adsorbent (36) comprises an activated carbon (361) layer and a desiccant (362) layer, the desiccant (362) layer is located below the activated carbon (361) layer, a dustproof net sleeve is arranged on the outer wall of the desiccant (362) layer and the activated carbon (361) layer, and a maintenance door that can be opened and closed is further arranged on the surface of the columnar shell.

5. The apparatus for purifying process gas of boron anhydride crystallization process according to claim 3, wherein: The electrostatic dust collector (40) comprises: a plurality of dust collection electrodes (41) longitudinally and spacedly arranged in the inner cavity of the electrostatic dust collector (40); a corona electrode (42) in the shape of a regular polygon, each of the corona electrodes (42) is fixedly sleeved on the outer side of the dust collection electrode (41).

6. The boron anhydride crystallization process gas purification treatment apparatus according to claim 5, characterized by: The chemical spray neutralization tower (50) comprises a spray tower and a spray frame (51) in the spray tower, and further comprises: an umbrella-shaped intercepting plate (52) fixedly arranged at the bottom of the inner cavity of the spray tower; a gas supply frame (53) fixedly connected to the top of the umbrella-shaped intercepting plate (52) and connected to the gas outlet end of the electrostatic dust collector (40); a plurality of gas supply nozzles (54) arranged above the umbrella-shaped intercepting plate (52) at equal intervals and connected to the gas supply frame (53), and each of the gas supply nozzles (54) has a downward spray angle; a liquid discharge pipe (55) connected to the spray tower body and located above the umbrella-shaped intercepting plate (52); an exhaust pipe (56) connected to the spray tower body at the upper portion of the spray frame (51) and used for outputting the treated gas.

7. The boron anhydride crystallization process gas purification treatment apparatus according to claim 5, characterized by: The dynamic back suction cylinder (22) is provided with: an outer cylinder (221) rotatably arranged in the middle portion of the inner cavity of the dust removal shell (21); a plurality of stress fan blades (222) arranged on the outer wall of the outer cylinder (221) and corresponding to the gas inlet position of the outer cylinder (221).

8. The boron anhydride crystallization process gas purification treatment apparatus according to claim 7, characterized by: The dynamic back suction cylinder (22) is further provided with: An inner lifting cylinder (224) is arranged on the inner side of the outer cylinder (221) and is in contact with the inner wall of the outer cylinder (221), and a threaded block (225) is arranged on the outer wall of the inner lifting cylinder (224); An adjusting screw rod (223) is movably arranged on the outer cylinder (221) and penetrates the threaded block (225); A plurality of gears (226) are fixedly installed on the rotating shaft of each force fan blade (222), and the gears (226) are located in the inner cavity of the outer cylinder (221); A plurality of racks (227) are fixedly installed on the outer wall of the inner lifting cylinder (224), and the racks (227) correspond to the gears (226) one by one and are in meshing connection.

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