A kind of tetramethylammonium hydroxide production wastewater treatment equipment and process

Abstract

The present application relates to wastewater treatment technical field, specifically to a kind of wastewater treatment equipment and process for tetramethylammonium hydroxide production, including the treatment pool with gas main in pool, the top of gas main is equipped with aerator;Aerator includes base pipe, the top of base pipe is equipped with the rectifier plate that is hollow inside and is communicated with base pipe, both board surfaces of rectifier plate are equipped with rectifier hole communicated with the cavity inside rectifier plate;The top of base pipe is also covered with the aeration membrane cover that simultaneously covers rectifier plate entirely, aeration membrane cover and base pipe form aeration chamber communicated with rectifier hole on rectifier plate, the surface of aeration membrane cover is equipped with aeration hole communicated with aeration chamber;Rectifier plate is supported up from inside aeration membrane cover aeration membrane cover, and aeration membrane cover is divided into upper aeration zone and lower aeration zone, when gas is sprayed through aeration hole at lower aeration zone, it will float up, and it will drive aeration membrane cover vibration to carry out the blockage cleaning of aeration hole, and it will move to the upper aeration zone above to carry out aeration compensation.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater treatment equipment and process for the production of tetramethylammonium hydroxide. Background Technology

[0002] Tetramethylammonium hydroxide, as a strong organic base, is widely used in semiconductor manufacturing, microelectronics processing, and organosilicon chemical synthesis. Its production process generates toxic and highly alkaline industrial wastewater. To avoid environmental pollution, this wastewater must be strictly treated to meet standards before it can be discharged.

[0003] The mainstream treatment process for tetramethylammonium hydroxide wastewater is a combination of "oxidation and detoxification + aerobic biochemical treatment": the oxidation and detoxification stage mainly uses advanced oxidation reactions to destroy the toxicity and stable structure of pollutants, transforming them into small molecules that are easily utilized by microorganisms; the aerobic biochemical treatment stage mainly relies on the metabolic action of aerobic microorganisms to decompose residual pollutants into harmless substances.

[0004] Sufficient dissolved oxygen is essential for the normal metabolic activities of aerobic microorganisms, and the supply of dissolved oxygen directly determines the efficiency of aerobic biochemical reactions and the degradation effect of pollutants. To continuously and stably provide sufficient dissolved oxygen to the reaction system, aerators are an indispensable core device in the aerobic biochemical treatment process. Their core principle is to introduce air (or oxygen) into the wastewater in the form of bubbles. Through sufficient contact between the bubbles and the wastewater, oxygen dissolves in the water, meeting the metabolic needs of aerobic microorganisms.

[0005] In related technologies, such as Chinese patent CN104326580B, a microporous aerator for sewage treatment is disclosed. It includes a support base, a flow distribution plate fixed on the support base and forming a closed chamber with the support base, and an aerator diaphragm attached to the outer wall of the flow distribution plate. The aerator diaphragm is provided with a number of aeration holes, and the flow distribution plate is provided with a number of airflow channels. The airflow channels are connected to the closed chamber and the aeration holes, thereby realizing aeration.

[0006] However, existing aerators are prone to clogging of their aeration holes during use, which affects the uniformity of aeration. At the same time, microbubbles are prone to morphological changes during their ascent (necking due to water pressure), which reduces oxygen transfer efficiency and makes it impossible to provide sufficient dissolved oxygen for aerobic microorganisms, thus affecting the treatment effect on tetramethylammonium hydroxide production wastewater. Summary of the Invention

[0007] Therefore, it is necessary to provide a wastewater treatment equipment and process for tetramethylammonium hydroxide production, addressing the problem of poor treatment effect in the current wastewater treatment process for tetramethylammonium hydroxide production.

[0008] The above objectives are achieved through the following technical solutions: A wastewater treatment device for the production of tetramethylammonium hydroxide includes a treatment tank, an air supply main pipe for supplying air within the treatment tank, and an aerator for aeration at the top of the air supply main pipe. The aerator includes a base pipe with its bottom end connected to the air supply main pipe, and a rectifier plate with a hollow interior and an opening at the top of the base pipe. Several rectifier holes communicating with the internal cavity of the rectifier plate are provided on both surfaces of the rectifier plate. The top of the base pipe is also covered by an aeration membrane cover that completely covers the rectifier plate. An aeration chamber communicating with the rectifier holes on the rectifier plate is formed between the aeration membrane cover and the base pipe. Several aeration holes communicating with the aeration chamber are provided on the surface of the aeration membrane cover. The air supply main pipe supplies air to the treatment tank sequentially through the base pipe, the internal cavity of the rectifier plate, the rectifier holes, the aeration chamber, and the aeration holes. The rectifier plate supports the aeration membrane cover from inside, dividing the aeration membrane cover into an upper aeration zone and a lower aeration zone.

[0009] Furthermore, a rotating tube is rotatably inserted at the top of the base tube, and several spiral blades are arranged circumferentially on the inner circumferential wall of the rotating tube; the rectifier plate is circular in shape; the rotating tube is connected to the rectifier plate through a transmission assembly to transmit its own rotation to the rectifier plate, and the rotation of the rectifier plate causes the aeration membrane cover to deform.

[0010] Furthermore, a mounting hole is provided on the lower plate of the rectifier plate, and the rectifier plate is rotatably sleeved on the outer side of the top end of the base tube through the mounting hole; the transmission assembly includes an external gear ring provided on the outer peripheral wall of the rotating tube, at least one gear meshing with the external gear ring and provided on the top of the base tube, and an internal gear ring meshing with the gear and provided on the wall of the mounting hole.

[0011] Furthermore, the mounting holes and rectifier plate are eccentrically positioned.

[0012] Furthermore, several rolling elements are movably embedded in the side wall of the rectifier plate along the circumferential direction, and the rolling elements and the inner surface of the aeration membrane cover are in rolling friction contact.

[0013] Furthermore, the rolling element is a ball bearing.

[0014] Furthermore, the opening of the aeration membrane cover can be detachably connected via fasteners and a base tube.

[0015] Furthermore, the fastener is a clamp, which detachably clamps the opening of the aeration membrane hood to the top outer wall of the base pipe from the outside of the hood opening.

[0016] Furthermore, the base pipe and the main gas supply pipe can be detachably connected.

[0017] This invention also provides a wastewater treatment process for the production of tetramethylammonium hydroxide, employing a wastewater treatment device for the production of tetramethylammonium hydroxide. The wastewater treatment process for the production of tetramethylammonium hydroxide includes the following steps: Wastewater treatment procedure: The tetramethylammonium hydroxide production wastewater, after oxidation and detoxification treatment, is introduced into the treatment pond; Microbial supply step: Add aerobic microorganisms to the treatment tank; Oxygen supply steps: Air / oxygen is supplied to the aerator through the main air supply pipe. The air / oxygen entering the aerator passes through the base pipe, the internal cavity of the rectifier plate, the rectifier hole, the aeration chamber, and the aeration hole in sequence to be aerated in the treatment tank.

[0018] The beneficial effects of this invention are: This invention relates to a wastewater treatment device and process for tetramethylammonium hydroxide production. By installing an aeration membrane hood that completely covers a rectifier plate, and with the rectifier plate supporting the aeration membrane hood from within, the aeration membrane hood is divided into an upper and lower aeration zone. During treatment, when gas is ejected through the aeration holes in the lower aeration zone, it rises and impacts the aeration membrane hood as it passes its lower surface. This impact causes the aeration membrane hood to vibrate, clearing impurities from the aeration holes in the upper aeration zone and ensuring uniform aeration. Furthermore, when the gas moves above the upper aeration zone, it constricts under water pressure, compensating for the aeration range of the upper aeration zone. This ensures efficient oxygen transfer while providing sufficient dissolved oxygen for aerobic microorganisms, thereby guaranteeing the effective treatment of tetramethylammonium hydroxide production wastewater.

[0019] Furthermore, by setting up a rotating tube and a transmission assembly, and taking advantage of the circular shape of the rectifier plate, the rotation of the rotating tube is transmitted to the rectifier plate through the transmission assembly during the processing. The rotation of the rectifier plate causes the aeration membrane cover to deform, thereby breaking down the dirt attached to the surface of the aeration membrane cover and reducing its clogging of the aeration holes.

[0020] Furthermore, by setting the rectifier plate to rotate eccentrically, the aeration range of the upper aeration zone is increased, the dead flow zone at the bottom of the treatment tank is reduced, and the treatment efficiency of tetramethylammonium hydroxide production wastewater is improved. At the same time, the deformation strength of the aeration membrane cover is further enhanced, thereby further breaking down the dirt attached to the surface of the aeration membrane cover and reducing its clogging of the aeration holes. In addition, the aeration membrane cover sections of the upper and lower aeration zones can be switched, which is conducive to improving the cleaning effect of the clogged aeration holes in the original upper aeration zone and ensuring the uniformity of aeration. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a wastewater treatment device for the production of tetramethylammonium hydroxide provided in an embodiment of the present invention; Figure 2 This is a top view schematic diagram of the wastewater treatment equipment for the production of tetramethylammonium hydroxide provided in an embodiment of the present invention; Figure 3A front view schematic diagram of the aerator in the wastewater treatment equipment for tetramethylammonium hydroxide production provided in an embodiment of the present invention; Figure 4 An exploded view of the aerator components of the wastewater treatment equipment for tetramethylammonium hydroxide production provided in an embodiment of the present invention. Figure 5 A three-dimensional structural diagram of the rectifier plate, internal gear ring, and ball bearing assembly of the wastewater treatment equipment for tetramethylammonium hydroxide production provided in an embodiment of the present invention. Figure 6 A top view of the aerator in the wastewater treatment equipment for tetramethylammonium hydroxide production provided in an embodiment of the present invention; Figure 7 for Figure 6 Sectional view along the AA direction; Figure 8 for Figure 7 A magnified schematic diagram of the structure at point Z in the middle; Figure 9 This is a cross-sectional structural schematic diagram of the aerator in the wastewater treatment equipment for the production of tetramethylammonium hydroxide provided in an embodiment of the present invention.

[0022] in: 1. Treatment pool; 2. Main air supply pipe; 201. Aeration branch pipe; 2011. Support pipe; 202. Connecting branch pipe; 3. Aerator; 301. Base pipe; 3011. First annular platform; 3012. Mounting groove; 302. Rectifier plate; 3021. Rectifier hole; 3022. Mounting hole; 3023. Annular protrusion; 3024. Second annular platform; 303. Aeration membrane cover; 3031. Upper aeration zone; 3032. Lower aeration zone; 304. Clamp; 305. Aeration chamber; 306. Rotating pipe; 3061. Third annular platform; 3062. Spiral blade; 307. Transmission assembly; 3071. External gear ring; 3072. Gear; 3073. Internal gear ring; 308. Ball bearing. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0024] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] In the process of treating tetramethylammonium hydroxide wastewater using existing aerators, some organic impurities and inorganic salts remain after the wastewater undergoes oxidation and detoxification. Simultaneously, microorganisms produce metabolic products during the aerobic biochemical process. These substances easily deposit on the surface of the aeration micropores of the aerator membrane, forming physical scaling. Furthermore, microorganisms in the wastewater system can attach to and multiply on the surface of the aeration micropores, forming biofilms, which in turn leads to clogging of the aeration micropores. This clogging disrupts the uniformity of aeration, resulting in insufficient dissolved oxygen supply in some areas of the wastewater system. This hinders the metabolism of aerobic microorganisms, leading to incomplete pollutant degradation and affecting the wastewater treatment effect.

[0027] Meanwhile, as the microbubbles generated by the aerator rise in the wastewater system, they are subjected to hydrostatic pressure, especially in deeper wastewater systems where water pressure increases with depth. This pressure causes radial compression (commonly known as "necking") of the rising microbubbles. This compression not only reduces the rising divergence area of ​​the microbubbles, decreasing the contact range between the bubbles and the wastewater, but also causes the compressed microbubbles to collide and aggregate, forming larger bubbles. These larger bubbles have a much smaller specific surface area than the microbubbles, resulting in a significant decrease in contact efficiency with the tetramethylammonium hydroxide wastewater. This leads to a reduced rate of oxygen dissolution from the bubbles into the wastewater, affecting the aerator's oxygenation efficiency and ultimately hindering the provision of sufficient dissolved oxygen for aerobic microorganisms. Consequently, the treatment effect on the tetramethylammonium hydroxide production wastewater is compromised.

[0028] Based on this, embodiments of the present invention provide a wastewater treatment device for the production of tetramethylammonium hydroxide, which is particularly suitable for purifying wastewater from the production of tetramethylammonium hydroxide. Of course, it is also suitable for purifying other wastewater that requires aerobic treatment.

[0029] Specifically, refer to Figures 1 to 9 As shown, the wastewater treatment equipment for tetramethylammonium hydroxide production includes a treatment tank 1. The treatment tank 1 can be a square shell structure, placed on a supporting surface such as the ground during installation, with an open top to facilitate the addition of tetramethylammonium hydroxide production wastewater and aerobic microorganisms before treatment, and the removal of the purified wastewater after treatment. The treatment tank 1 is equipped with a main air supply pipe 2 for supplying air. The main air supply pipe 2 includes interconnected aeration branch pipes 201 and connecting branch pipes 202. The aeration branch pipes 201 are arranged in a preset trajectory, such as an S-shape, around the bottom of the treatment tank 1, with one end sealed away from the connecting branch pipe 202 to prevent gas from directly entering the treatment tank 1 through the end of the aeration branch pipe 201. The connecting branch pipe 202 extends upwards and passes through the open top of the treatment tank 1 to connect with the outside environment and facilitate the reception of air / oxygen. An aerator 3 for aeration is located at the top of the main air supply pipe 2, specifically at the top of the aeration branch pipes 201.

[0030] The aerator 3 includes a base pipe 301 connected to the bottom end of the main air supply pipe 2, which is vertically arranged. To facilitate connection with the base pipe 301, a support pipe 2011 is provided at the top of the aeration branch pipe 201. The support pipe 2011 is connected to the aeration branch pipe 201 and is vertically arranged. During installation, the base pipe 301 can be threaded into the support pipe 2011 at its bottom end, allowing for detachable connection with the main air supply pipe 2, facilitating subsequent replacement and maintenance. The top of the base pipe 301 has a hollow internal rectifier plate 302 connected to the opening at the top of the base pipe 301. The rectifier plate 302 is horizontally arranged, and both surfaces of the rectifier plate 302 have several rectifier holes 3021 communicating with the internal cavity of the rectifier plate 302. The shape of the rectifier holes 3021 can be customized. The aeration membrane hood 303 is circular and its axis is perpendicular to the surface of the rectifier plate 302. The top of the base tube 301 is covered by an aeration membrane hood 303 that also completely covers the rectifier plate 302. The aeration membrane hood 303 is shaped like a balloon. The opening of the aeration membrane hood 303 can be detachably connected to the base tube 301 by fasteners such as clamps 304. Specifically, the clamps 304 detachably clamp the opening of the aeration membrane hood 303 to the outer wall of the top of the base tube 301 from the outside of the opening. An aeration chamber 305 is formed between the aeration membrane hood 303 and the base tube 301, which completely covers the rectifier plate 302 and communicates with the rectifier hole 3021 on the rectifier plate 302. Several aeration holes that penetrate from the inside and outside are provided on the surface of the aeration membrane hood 303 at various positions.

[0031] It should also be noted that, in order to prevent the rectifier plate 302 from tearing the aeration film cover 303, the edges of the rectifier plate 302 must be rounded.

[0032] In the process of treating the wastewater from the production of tetramethylammonium hydroxide, the wastewater from the production of tetramethylammonium hydroxide after oxidation and detoxification is first introduced into treatment tank 1. Then, aerobic microorganisms are added to treatment tank 1. Then, air / oxygen is supplied to the inside of treatment tank 1 through the main air supply pipe 2, in sequence through the base pipe 301, the internal cavity of the rectifier plate 302, the rectifier hole 3021, the aeration chamber 305, and the aeration hole.

[0033] The rectifier plate 302 supports the aeration membrane cover 303 from inside, forming an independent upper aeration zone 3031 and a lower aeration zone 3032. The upper aeration zone 3031 is located above the rectifier plate 302, and the lower aeration zone 3032 is located below the rectifier plate 302. The aeration chamber 305 is formed by the inner space of the upper aeration zone 3031, the peripheral gap of the rectifier plate 302, and the inner space of the lower aeration zone 3032, completely covering the upper and lower sides of the rectifier plate 302. Furthermore, in the initial state, no air / oxygen enters the air supply main pipe 2, and the aeration membrane cover 303, located above the rectifier plate 302, is in contact with the rectifier plate 302. The surface state: When air / oxygen enters the main air supply pipe 2, the aeration membrane cover 303 is supported by air / oxygen. Compared with the initial state, the aeration membrane cover 303 above the rectifier plate 302 changes from a state of being in contact with the upper surface of the rectifier plate 302 to a state of not contacting the upper surface of the rectifier plate 302. Since the surface of the aeration membrane cover 303 at each position is provided with several aeration holes that penetrate from the inside and outside, after the aeration membrane cover 303 is supported by air / oxygen, air / oxygen can be discharged from the aeration membrane cover 303 on the upper and lower sides of the rectifier plate 302, thereby dividing the aeration membrane cover 303 into an independent upper aeration zone 3031 and a lower aeration zone 3032. During aeration, the gas ejected from the aeration holes in the lower aeration zone 3032 rises upwards along the water surface. The rising airflow impacts the lower surface of the aeration membrane hood 303, causing it to vibrate regularly. This vibration, through its mechanical force, peels away and removes blockages from the aeration holes in the upper aeration zone 3031, effectively preventing clogging and ensuring uniformity of the aeration process. Simultaneously, as the airflow from the lower aeration zone 3032 rises along the lower surface of the aeration membrane hood 303 to above the upper aeration zone 3031, it undergoes radial compression under the hydrostatic pressure of the water. This compressed airflow effectively compensates for the aeration range of the upper aeration zone 3031, mitigating the reduced diffusion area of ​​the bubbles due to water pressure. This maintains the oxygen transfer efficiency of the aeration system, ensuring a continuous supply of sufficient dissolved oxygen to the aerobic microorganisms in treatment tank 1, and guaranteeing the reaction efficiency and overall treatment effect of the aerobic biochemical treatment of the tetramethylammonium hydroxide production wastewater.

[0034] It should be noted that by setting the connection between the aeration membrane cover 303 and the rectifier plate 302 to be non-fixed, the aeration membrane cover 303 can be stretched almost uniformly around its circumference, which can effectively reduce the probability of tearing and help extend its working life.

[0035] To ensure uniform aeration, multiple aerators 3 can be installed and arranged at intervals along the extension path of the aeration branch pipe 201. Sufficient distance must be maintained between adjacent aerators 3 to avoid interference between their aeration ranges and affect the aeration effect. When there are multiple aerators 3, multiple support pipes 2011 are correspondingly installed and arranged at intervals along the extension path of the aeration branch pipe 201.

[0036] To improve the sealing between the base tube 301 and the support tube 2011 and prevent air leakage, a sealing element, such as a sealing ring, can be provided between the base tube 301 and the support tube 2011; alternatively, threadlocker can be applied to the threaded joint between the base tube 301 and the support tube 2011.

[0037] To facilitate the connection between the rectifier plate 302 and the base tube 301, a first annular platform 3011 is provided on the outer peripheral wall of the base tube 301 near its top end. The first annular platform 3011 and the base tube 301 are coaxially arranged. A mounting hole 3022 is provided on the lower plate surface of the rectifier plate 302. The mounting hole 3022 communicates with the internal cavity of the rectifier plate 302. An annular protrusion 3023 is provided on the top inner peripheral wall of the mounting hole 3022. The annular protrusion 3023 and the mounting hole 3022 are connected. The rectifier plate 302 is coaxially arranged with a second annular platform 3024 on the lower plate surface. The second annular platform 3024 and the mounting hole 3022 are coaxially arranged, and the inner diameter of the second annular platform 3024 is larger than the inner diameter of the annular protrusion 3023, so that the mounting hole 3022 forms a two-stage concentric circular hole structure with the upper part smaller and the lower part larger. When the rectifier plate 302 is installed, the annular protrusion 3023 is pressed against the top of the first annular platform 3011, and the second annular platform 3024 is sleeved on the outside of the first annular platform 3011.

[0038] In one embodiment, to improve the cleaning effect on clogged aeration holes, a rotating tube 306 is rotatably inserted at the top of the base tube 301. The rotating tube 306 is vertically arranged, and a third annular platform 3061 is provided on the outer peripheral wall of its top end. The third annular platform 3061 and the rotating tube 306 are coaxially arranged. During installation, the third annular platform 3061 is pressed against the top end of the base tube 301. Several spiral blades 3062 are arranged circumferentially on the inner peripheral wall of the rotating tube 306. When gas passes through the spiral blades 3062, the spiral action surface of the spiral blades 3062 drives the rotating tube 306 to rotate. The rectifier plate 302 is circular in shape to avoid scratching the aeration membrane cover 303 during rotation. The rotating tube 306 is connected to the rectifier plate 302 through a transmission assembly 307 to transmit its own rotation to the rectifier plate 302.

[0039] During the process of gas entering the base pipe 301, when the gas flows through the spiral blades 3062 on the inner peripheral wall of the rotating pipe 306, the force of the airflow acts on the spiral surface of the spiral blades 3062. With the help of the transmission characteristics of the spiral structure, the rotating pipe 306 is driven to rotate around the axis of the base pipe 301. The rotational motion of the rotating pipe 306 is synchronously transmitted to the rectifier plate 302 through the transmission component 307, driving the rectifier plate 302 to rotate accordingly. During the rotation, the rectifier plate 302 forms a continuous pushing and pulling effect on the aeration membrane cover 303, causing the aeration membrane cover 303 to produce regular deformation and shaking. Through this mechanical action, the physical scale and biological dirt attached to the surface of the aeration membrane cover 303 can be effectively peeled off and destroyed, reducing the deposition and blockage of dirt around the aeration holes from the root, further improving the cleaning effect of the aeration hole blockage, and ensuring the smooth output of the aeration airflow.

[0040] In one embodiment, the transmission assembly 307 is configured to include an external gear ring 3071 disposed on the outer peripheral wall of the rotating tube 306, at least one gear 3072 meshing with the external gear ring 3071 and disposed on the top of the base tube 301, and an internal gear ring 3073 meshing with the gear 3072 and disposed on the wall of the mounting hole 3022. The external gear ring 3071 is specifically sleeved on the outside of the second ring platform 3024. To facilitate the installation of the gear 3072, a mounting groove 3012 is provided on the top of the first ring platform 3011. When the gear 3072 is installed, its shaft rotates and is inserted into the mounting groove 3012. The internal gear ring 3073 is specifically inserted into the inside of the first annular protrusion 3023.

[0041] During the rotation of the rotating tube 306, the external gear ring 3071 rotates synchronously. The external gear ring 3071 drives the internal gear ring 3073 to rotate through the meshing with the gear 3072. The internal gear ring 3073 drives the rectifier plate 302 to rotate synchronously, so as to realize the transmission of the rotation of the rotating tube 306 to the rectifier plate 302.

[0042] It should be noted that the external gear ring 3071, gear 3072, and internal gear ring 3073 together constitute the sun gear transmission structure. This structure relies on the transmission ratio characteristics of gear meshing to smoothly convert the high-speed rotational motion of the rotating tube 306 driven by airflow into the low-speed rotation of the rectifier plate 302. This avoids problems such as violent shaking of the aeration membrane cover 303 and turbulent aeration airflow caused by the rectifier plate 302 rotating too fast, ensuring the stability and smoothness of the aeration process. At the same time, it keeps the deformation and shaking of the aeration membrane cover 303 within a controllable range, achieving both the effect of dirt cleaning and maintaining the uniform output of aeration airflow, thus ensuring the stability of dissolved oxygen supply.

[0043] In a further embodiment, the transmission assembly 307 comprises multiple gears 3072, which are evenly arranged circumferentially along the base tube 301. The number of mounting slots 3012 matches the number of gears 3072, and they are also arranged circumferentially along the base tube 301, ensuring that each gear 3072 can be stably mounted in an independent mounting slot 3012. The circumferentially distributed arrangement of multiple gears 3072 allows the torque transmitted by the rotating tube 306 to be evenly applied to the outer gear ring 3071 and the inner gear ring 3073 through multiple meshing points. This avoids stress concentration problems when a single gear 3072 is in operation, resulting in more balanced power transmission. This effectively improves the stability and smoothness of power transmission between the rotating tube 306 and the rectifier plate 302, ensures the uniformity of the rectifier plate 302's rotation, and also reduces the wear rate of individual gears 3072, extending the overall service life of the transmission assembly 307.

[0044] In other embodiments, when the rotating tube 306 rotates at low speed, the transmission assembly 307 can also be configured to include a slot and a protrusion, wherein the slot is provided on the outer peripheral wall of the third ring platform 3061, and the protrusion is provided on the inner peripheral wall of the ring protrusion 3023, and is matched and inserted into the slot during installation, so that the rotation of the rotating tube 306 can be directly transmitted to the rectifier plate 302 through the insertion and engagement between the protrusion and the slot.

[0045] Alternatively, the slot may be located on the inner peripheral wall of the annular protrusion 3023, and the protrusion may be located on the outer peripheral wall of the third annular platform 3061. This allows the rotation of the rotating tube 306 to be directly transmitted to the rectifier plate 302 through the insertion and engagement between the protrusion and the slot.

[0046] In one embodiment, to further expand the effective aeration range of the aerator 3, the mounting hole 3022 of the rectifier plate 302 is eccentrically positioned with respect to the body of the rectifier plate 302. When the rectifier plate 302 is driven by the transmission component 307 to rotate around the base tube 301, the eccentric arrangement of the mounting hole 3022 and the body of the rectifier plate 302 creates an eccentric rotation motion, which drives the upper aeration zone 3031 of the aeration membrane cover 303 to perform an eccentric circular motion. This causes the outflow direction of the aeration holes in the upper aeration zone 3031 to change regularly with the rotation, breaking the limitation of the conventional coaxial rotation aeration range, significantly expanding the aeration coverage area of ​​the upper aeration zone 3031, and allowing the aeration airflow to reach the original dead flow area at the bottom of the treatment tank 1, reducing the dead flow area of ​​the wastewater in the tank, improving the contact reaction efficiency between wastewater and oxygen and aerobic microorganisms, and thus improving the overall treatment efficiency of the tetramethylammonium hydroxide production wastewater.

[0047] Meanwhile, the eccentric rotation of the rectifier plate 302 makes the pushing and pulling forces on the aeration membrane cover 303 more regular than those of coaxial rotation. The force difference of the membrane in different areas is further amplified, thereby significantly enhancing the overall deformation strength and vibration amplitude of the aeration membrane cover 303. Through stronger mechanical deformation, it can more efficiently peel off and destroy the physical scale and biological dirt attached to the surface of the aeration membrane cover 303, further reducing the deposition and blockage of dirt at the aeration holes from the source, ensuring smooth flow of the aeration holes and maintaining a stable aeration effect.

[0048] In addition, refer to Figure 7 and Figure 9 During the eccentric rotation of the rectifier plate 302, the aeration membrane hoods 303 of the upper aeration zone 3031 and the lower aeration zone 3032 can be switched. Specifically, during the eccentric rotation of the rectifier plate 302, affected by the periodic change in the eccentric position of the rectifier plate 302, different circumferential areas of the aeration membrane hood 303 will periodically switch positions between above and below the rectifier plate 302. That is, the area originally above the rectifier plate 302 and belonging to the upper aeration zone 3031 will, with the eccentric rotation of the rectifier plate 302, become below the rectifier plate 302 and belong to the lower aeration zone 3032; while the area originally in the lower aeration zone 3031 will, with the eccentric rotation of the rectifier plate 302, become below the rectifier plate 302 and belong to the lower aeration zone 3032; while the area originally in the lower aeration zone 3031 and belonging to the lower aeration zone 3032 will, with the eccentric rotation of the rectifier plate 302, become below the rectifier plate 302 and belong to the lower aeration zone 3032. In area 32, the aeration zone will be simultaneously switched to the upper aeration zone 3031. When the aeration membrane hood 303 of the original upper aeration zone 3031 switches to the lower aeration zone 3032, the gas ejected from the aeration holes of the original aeration membrane hood 303 of the original upper aeration zone 3031 rises upwards along the water surface. This rising airflow impacts the aeration membrane hood 303 of the original upper aeration zone 3031, causing it to vibrate regularly. The mechanical force of this vibration peels away and removes the clogging impurities adhering to the aeration holes of the original aeration membrane hood 303 of the original upper aeration zone 3031, effectively preventing aeration hole clogging. Meanwhile, when the aeration membrane hood 303 of the original lower aeration zone 3032 switches to the upper aeration zone 3031, its aeration holes have already been cleared in the aforementioned process, ensuring the uniformity of the aeration process.

[0049] In one embodiment, to reduce contact wear between the rectifier plate 302 and the aeration membrane cover 303 during rotation and extend the service life of the aeration membrane cover 303, a plurality of rolling elements are movably embedded in the side wall of the rectifier plate 302 along the circumferential direction, so that the rolling elements maintain rolling friction contact with the inner surface of the aeration membrane cover 303, replacing the direct sliding friction between the two with rolling friction, thereby reducing frictional resistance and contact wear from the contact form, and at the same time avoiding scratch damage to the aeration membrane cover 303 when the rectifier plate 302 rotates, thus ensuring the structural integrity of the aeration membrane cover 303.

[0050] In a further embodiment, the rolling element is set as a ball bearing 308, thereby utilizing the spherical contact characteristics of the ball bearing 308 to form a point contact rolling fit between the rectifier plate 302 and the inner surface of the aeration film cover 303, further reducing contact stress and friction loss, while making the rotation of the rectifier plate 302 smoother and not affecting the stability of its rotational transmission.

[0051] In one embodiment, the aeration membrane cover 303 is made of a flexible material that is alkali-resistant and aging-resistant, specifically ethylene propylene diene monomer (EPDM), silicone rubber, or polyurethane. The wall thickness of the aeration membrane cover 303 is 0.5mm-2mm; the aeration holes have a microporous structure with a pore size of 0.1mm-0.5mm, and the porosity of the aeration membrane cover 303 is 15%-30%. The specific parameters of the aeration membrane cover 303 can be adaptively adjusted according to the water depth, aeration volume, and wastewater quality of the treatment tank 1.

[0052] In other embodiments, the rolling element can also be configured as a vertically arranged cylindrical structure, so that the peripheral sidewall of the cylinder forms a line contact rolling fit with the inner surface of the aeration membrane cover 303. The uniformity of contact support is increased through linear rolling contact, which can also realize the conversion of sliding friction to rolling friction, effectively reducing the wear caused by the rotation of the rectifier plate 302 on the aeration membrane cover 303, and adapting to the underwater working conditions and transmission requirements of the aerator 3.

[0053] In other embodiments, to achieve a detachable connection between the base tube 301 and the support tube 2011, the base tube 301 and the support tube 2011 can be configured to have the same size. Both the base tube 301 and the support tube 2011 have annular slots on their respective end faces that are close to each other, and a sealing ring is inserted into one of the annular slots. A nut is movably fitted onto the base tube 301 / support tube 2011, and external threads are provided on the outer wall of the support tube 2011 / base tube 301. When the base tube 301 and the support tube 2011 are joined together, and the sealing ring is simultaneously inserted into both annular slots, the base tube 301 and the support tube 2011 are detachably connected together through the threaded engagement between the nut and the external threads.

[0054] In other embodiments, to enable a detachable connection between the base pipe 301 and the support pipe 2011, the base pipe 301 and the support pipe 2011 can be connected via a flange.

[0055] In other embodiments, the fastener may also be a cable tie.

[0056] Another embodiment of the present invention provides a wastewater treatment process for the production of tetramethylammonium hydroxide, which employs a wastewater treatment device for the production of tetramethylammonium hydroxide. The wastewater treatment process for the production of tetramethylammonium hydroxide includes the following steps: Wastewater treatment procedure: The tetramethylammonium hydroxide production wastewater, after oxidation and detoxification treatment, is introduced into treatment pond 1; Microbial supply step: Add aerobic microorganisms to treatment tank 1; Oxygen supply steps: Air / oxygen is supplied to aerator 3 through main air supply pipe 2. The air / oxygen entering aerator 3 passes through base pipe 301, the internal cavity of rectifier plate 302, rectifier hole 3021, aeration chamber 305, and aeration hole in sequence to be aerated in treatment tank 1.

[0057] Specifically, the aeration membrane cover 303 completely covers the rectifier plate 302, and the rectifier plate 302 supports the aeration membrane cover 303 from inside the aeration membrane cover 303, dividing the aeration membrane cover 303 into an upper aeration zone 3031 and a lower aeration zone 3032. During the treatment process, when the gas is ejected through the aeration holes in the lower aeration zone 3032, it floats up and impacts the aeration membrane cover 303 when it passes the lower surface of the aeration membrane cover 303. This impact causes the aeration membrane cover 303 to vibrate, thus cleaning the impurities clogging the aeration holes in the upper aeration zone 3031 and ensuring the uniformity of aeration. When it moves above the upper aeration zone 3031, it constricts under water pressure, compensating for the aeration range of the upper aeration zone 3031. This ensures oxygen transfer efficiency while providing sufficient dissolved oxygen for aerobic microorganisms, thereby ensuring the treatment effect on tetramethylammonium hydroxide production wastewater.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A wastewater treatment device for the production of tetramethylammonium hydroxide, characterized in that, The treatment tank (1) includes an air supply main pipe (2) for supplying air, and an aerator (3) for aeration is provided at the top of the air supply main pipe (2). The aerator (3) includes a base pipe (301) with its bottom end connected to the air supply main pipe (2). The top of the base pipe (301) is provided with a rectifier plate (302) that is hollow inside and connected to the opening at the top of the base pipe (301). Both sides of the rectifier plate (302) are provided with several rectifier holes (3021) that are connected to the cavity inside the rectifier plate (302). The top of the base pipe (301) is also covered with an aeration membrane cover (303) that covers the entire rectifier plate (302). 03) An aeration chamber (305) is formed between the base pipe (301) and the rectifier hole (3021) on the rectifier plate (302). The surface of the aeration membrane cover (303) is provided with several aeration holes that are connected to the aeration chamber (305). The main air supply pipe (2) supplies air to the treatment tank (1) in sequence through the base pipe (301), the cavity inside the rectifier plate (302), the rectifier hole (3021), the aeration chamber (305), and the aeration holes. The rectifier plate (302) supports the aeration membrane cover (303) from the inside of the aeration membrane cover (303) and divides the aeration membrane cover (303) into an upper aeration zone (3031) and a lower aeration zone (3032).

2. The wastewater treatment equipment for tetramethylammonium hydroxide production according to claim 1, characterized in that, A rotating tube (306) is rotatably inserted at the top of the base tube (301). Several spiral blades (3062) are arranged circumferentially on the inner circumferential wall of the rotating tube (306). The rectifier plate (302) is circular in shape. The rotating tube (306) is connected to the rectifier plate (302) through the transmission assembly (307) to transmit its own rotation to the rectifier plate (302), and the rotation of the rectifier plate (302) causes the aeration membrane cover (303) to deform.

3. The wastewater treatment equipment for tetramethylammonium hydroxide production according to claim 2, characterized in that, The lower plate of the rectifier plate (302) is provided with a mounting hole (3022), and the rectifier plate (302) is rotatably sleeved on the outer side of the top end of the base tube (301) through the mounting hole (3022); the transmission assembly (307) includes an external gear ring (3071) provided on the outer peripheral wall of the rotating tube (306), at least one gear (3072) meshing with the external gear ring (3071) and provided on the top of the base tube (301), and an internal gear ring (3073) meshing with the gear (3072) and provided on the hole wall of the mounting hole (3022).

4. The wastewater treatment equipment for the production of tetramethylammonium hydroxide according to claim 3, characterized in that, The mounting holes (3022) and the rectifier plate (302) are eccentrically positioned.

5. The wastewater treatment equipment for the production of tetramethylammonium hydroxide according to claim 2, characterized in that, Several rolling elements are movably embedded in the side wall of the rectifier plate (302) along the circumferential direction, and the rolling elements and the inner surface of the aeration film cover (303) are in rolling friction contact.

6. The wastewater treatment equipment for tetramethylammonium hydroxide production according to claim 5, characterized in that, The rolling element is a ball (308).

7. The wastewater treatment equipment for the production of tetramethylammonium hydroxide according to claim 1, characterized in that, The opening of the aeration membrane cover (303) can be detachably connected to the base tube (301) via fasteners.

8. The wastewater treatment equipment for the production of tetramethylammonium hydroxide according to claim 7, characterized in that, The fastener is a clamp (304), which detachably clamps the opening of the aeration membrane cover (303) to the top outer wall of the base pipe (301) from the outside of the opening of the aeration membrane cover (303).

9. The wastewater treatment equipment for the production of tetramethylammonium hydroxide according to claim 1, characterized in that, The base pipe (301) and the main gas supply pipe (2) can be detachably connected.

10. A wastewater treatment process for the production of tetramethylammonium hydroxide, characterized in that, The wastewater treatment equipment for the production of tetramethylammonium hydroxide as described in claim 1, wherein the wastewater treatment process for the production of tetramethylammonium hydroxide includes the following steps: Wastewater treatment procedure: The tetramethylammonium hydroxide production wastewater after oxidation and detoxification treatment is introduced into the treatment pond (1); Microbial supply steps: Add aerobic microorganisms to the treatment tank (1); Oxygen supply steps: Air / oxygen is supplied to aerator (3) through the main air supply pipe (2). The air / oxygen entering the aerator (3) is aerated in the treatment tank (1) in sequence through the base pipe (301), the internal cavity of the rectifier plate (302), the rectifier hole (3021), the aeration chamber (305), and the aeration hole.

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