A wastewater treatment device

Abstract

This application provides a wastewater treatment device, belonging to the field of wastewater treatment technology. The wastewater treatment device includes a tank, a collection mechanism, and a treatment structure. A flotation zone and a separation zone are set within the tank. The treatment structure oxidizes the wastewater and is connected to the flotation zone, allowing solid-liquid separation after the oxidized wastewater enters the flotation zone. A separation mechanism is set in the separation zone, and a sludge discharge port is provided on the tank. After the wastewater flotated to the separation zone is separated by the separation mechanism, some of the mixed flocs settle and fall into the sludge discharge port for discharge. A deflocculation component and a collection component are sequentially connected to the sludge discharge port. After the mixed flocs in the sludge discharge port are deflocculated by the deflocculation component, the catalyst in the mixed flocs is captured and collected by the collection component. Therefore, during the wastewater treatment process, the catalyst in the treatment structure can be separated and recovered through the collection mechanism, thereby achieving catalyst reuse.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to a wastewater treatment device. Background Technology

[0002] Wastewater from industries such as printing and dyeing, papermaking, chemicals, and pharmaceuticals is characterized by large volume, high concentration, strong toxicity, and poor biodegradability. High-concentration industrial wastewater is usually treated using Fenton technology, adsorption technology, and air flotation technology.

[0003] In related technologies, wastewater treatment devices include micro-nano bubble generators, steam heaters, and high-temperature reactors containing various reagents and catalysts. Wastewater is drawn from a bubble-forming tank by the micro-nano bubble generator, generating wastewater filled with micro-nano bubbles, which is then pumped back into the bubble-forming tank to form a cycle. The wastewater in the bubble-forming tank is pumped into the steam heater, and after being heated, it is sprayed into the high-temperature reactor through micro-nano bubble nozzles for further treatment. The effluent from the high-temperature reactor enters a flocculation sedimentation tank, where pollutants are removed through flocculation and sedimentation.

[0004] However, the catalysts in the aforementioned wastewater treatment devices are difficult to separate and reuse. Summary of the Invention

[0005] This application provides a wastewater treatment device to solve the problem that catalysts in existing wastewater treatment devices are difficult to separate and reuse.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0007] This application provides a wastewater treatment device, including a tank and a collection mechanism and at least one treatment structure disposed on the tank, the treatment structure including a Fenton reaction mechanism and an air flotation mechanism;

[0008] Both the Fenton reaction mechanism and the air flotation mechanism are connected to the tank. The tank has an interconnected air flotation zone and a separation zone. The Fenton reaction mechanism is used to oxidize wastewater and transport the oxidized wastewater to the air flotation zone.

[0009] The air flotation mechanism is located within the air flotation zone. The air flotation mechanism is used to generate micro-nano bubbles, which are used to separate the solid and liquid components of the wastewater within the air flotation zone.

[0010] The separation zone is equipped with a separation mechanism, which is used to separate the mixed flocs in the wastewater entering the separation zone;

[0011] The box body is provided with at least one sludge discharge port that communicates with the separation zone, and the sludge discharge port is used to discharge the precipitated mixed flocs;

[0012] The collection mechanism includes a deflocculation component and a collection component connected in sequence, and the deflocculation component is connected to the sludge discharge port. The collection component is configured to capture and collect the catalyst in the mixed flocs after the deflocculation component deflocculates the mixed flocs.

[0013] In one possible implementation, the deflocculation assembly includes a deflocculator and a sludge collection tank, and the collection assembly includes a magnetic drum, a scraper, and a catalyst collection hopper;

[0014] The inlet of the deflocculator is connected to the sludge discharge port, the magnetic drum is rotatably mounted on the outlet of the deflocculator, and the sludge collection tank is located between the outlet and the magnetic drum. The sludge collection tank is used to collect sludge from the mixed flocs; the magnetic drum is used to capture the catalyst.

[0015] The catalyst collecting hopper has an opening, one end of the scraper is disposed on the opening, and the other end of the scraper contacts the magnetic drum, so that the catalyst falls into the interior of the catalyst collecting hopper through the scraper.

[0016] In one possible implementation, the interior of the tank is provided with a clear water zone, and the separation zone is located between the air flotation zone and the clear water zone;

[0017] A partition plate is provided between the clear water zone and the separation zone, and an overflow weir is provided on the side of the partition plate facing the separation zone. The overflow weir is used to collect part of the wastewater after separation by the separation mechanism.

[0018] A guide plate is provided between the separation zone and the air flotation zone. An inlet is provided on the side wall of the air flotation zone opposite to the guide plate. The inlet is used to connect the air flotation zone and the Fenton reaction mechanism.

[0019] The inlet and outlet of the air flotation mechanism are both connected to the clear water zone, and the outlet has at least one output section that extends into the air flotation zone. The micro-nano bubbles enter the air flotation zone from the outlet through the output section.

[0020] The separation mechanism is located above the separation zone, and a sludge hopper is provided at the bottom of the separation zone, with the sludge discharge port located on the sludge hopper.

[0021] In one possible implementation, the air flotation mechanism includes a gas-liquid mixing pump, an air pump, a flow monitoring device, and a flow control device;

[0022] Both the liquid inlet and the liquid outlet are located on the gas-liquid mixing pump, and the gas-liquid mixing pump is connected to the gas pump.

[0023] The flow monitoring device and the gas-liquid mixing pump are both electrically connected to the flow control device, and the flow monitoring device is installed on the liquid outlet. The flow monitoring device is used to monitor the amount of bubbles generated at the liquid outlet.

[0024] The flow control element is configured to increase the liquid inlet flow rate when the bubble generation rate is less than a preset bubble generation rate.

[0025] In one possible implementation, the application further includes a release mechanism, which includes a motion control component, a monitoring and adjustment component, and a micro / nano bubble releaser;

[0026] The monitoring and adjustment assembly includes a telescopic component, a rotating component, and an image collector, all of which are electrically connected to the motion control component.

[0027] The telescopic component, the rotating component, and the micro-nano bubble releaser are connected in sequence. The end of the telescopic component facing away from the rotating component is connected to the output section. The micro-nano bubbles are released by the micro-nano bubble releaser after passing through the output section, the telescopic component, and the rotating component.

[0028] The image collector is positioned above the air flotation zone to capture the rising velocity of the micro- and nano-bubbles.

[0029] The motion control component is configured to, when the rising speed is less than a preset rising speed, control the telescopic component to extend or retract relative to the output section or control the rotating component to rotate, so that the micro-nano bubbles rise at different positions in the air flotation zone.

[0030] In one possible implementation, the separation mechanism includes a slag scraper and a scum trough, the slag scraper being disposed above the separation zone and the scum trough being disposed below the slag scraper, and the scum trough being adjacent to the overflow weir.

[0031] In one possible implementation, the Fenton reaction mechanism includes a reactor body, multiple reagent dosing ports, and a regulating assembly;

[0032] The reactor body includes a first mixing pipe section, a second mixing pipe section, and a third mixing pipe section arranged at intervals, and the first mixing pipe section, the second mixing pipe section, and the third mixing pipe section are connected through a reaction pipe section;

[0033] Static mixing elements are provided on the first mixing pipe section, the second mixing pipe section and the third mixing pipe section, and the reagent dosing port is respectively located on the first mixing pipe section and the second mixing pipe section;

[0034] The regulating component includes an alkali inlet, a coagulant inlet, and a flocculant inlet, which are sequentially arranged on the third mixing pipe section.

[0035] In one possible implementation, the application further includes an ultraviolet component, which includes at least two first ultraviolet lamps, at least one second ultraviolet lamp, and at least one quartz protective tube.

[0036] The two first ultraviolet lamps are respectively disposed on opposite sidewalls of the air flotation zone;

[0037] The quartz protective tube is sleeved in the reaction tube section between the second mixing tube section and the third mixing tube section, and the second ultraviolet lamp is located inside the quartz protective tube.

[0038] In one possible implementation, the application further includes at least one micro-nano bubble dissolved air water inlet, which is disposed at one end of the second mixing tube section facing the third mixing tube section.

[0039] In one possible implementation, the application further includes a pressure monitoring component comprising a pressure gauge and a safety valve, the pressure gauge and the safety valve being spaced apart at one end of the first mixing section toward the reaction section.

[0040] This application provides a wastewater treatment device, comprising a tank, a collection mechanism, and at least one treatment structure. The treatment structure includes a Fenton reaction mechanism and an air flotation mechanism. The tank contains an interconnected air flotation zone and a separation zone. The Fenton reaction mechanism is located on the outer wall of the tank and communicates with the air flotation zone, allowing wastewater oxidized by the Fenton reaction mechanism to be transported to the air flotation zone. A portion of the air flotation mechanism is located within the air flotation zone, enabling the micro-nano bubbles generated by the air flotation mechanism to perform solid-liquid separation on the wastewater entering the air flotation zone. A separation mechanism is provided in the separation zone, and a sludge discharge port is provided on the tank communicating with the separation zone. After the mixed flocs in the wastewater are separated by the separation mechanism, some of the mixed flocs settle and fall into the sludge discharge port for discharge. A deflocculation component and a collection component are sequentially connected to the sludge discharge port, allowing the mixed flocs in the sludge discharge port to be deflocculated by the deflocculation component, and then the catalyst in the mixed flocs is captured and collected by the collection component. Therefore, in the wastewater treatment process, the catalyst added to the Fenton reaction mechanism can be separated and recovered through a collection mechanism, thereby realizing the reuse of the catalyst. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings included herein are incorporated in and constitute a part of this specification, illustrating embodiments consistent with this application, and together with the description are used to explain the principles of this application.

[0042] Figure 1 A schematic diagram of the wastewater treatment device provided in the embodiments of this application;

[0043] Figure 2 for Figure 1 A schematic diagram of the Fenton reaction mechanism.

[0044] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100 - Box;

[0047] 110 - Air flotation zone; 111 - Baffle plate; 112 - Inlet;

[0048] 120 - Separation zone; 121 - Separation mechanism; 1211 - Slag scraper; 1212 - Scum trough;

[0049] 130 - Clear water zone; 131 - Divider plate; 1311 - Overflow weir; 132 - Water quality monitor;

[0050] 140 - Sludge hopper; 141 - Sludge discharge port;

[0051] 200 - Collection agency;

[0052] 210-Deflocculation assembly; 211-Deflocculator; 212-Sludge collection tank;

[0053] 220 - Collection assembly; 221 - Magnetic drum; 222 - Scraper; 223 - Catalyst collection hopper;

[0054] 300 - Processing Structure;

[0055] 310 - Fenton reaction mechanism; 311 - Reactor body; 3111 - First mixing section; 3112 - Second mixing section; 3113 - Third mixing section; 3114 - Reaction section; 3115 - Static mixing element; 312 - Reagent inlet; 3121 - Acid inlet; 3122 - Catalyst inlet; 3123 - Ferrous sulfate inlet; 3124 - Hydrogen peroxide inlet; 3 13-Regulating component; 3131-Alkali solution inlet; 3132-Coagulant inlet; 3133-Flocculant inlet; 3134-Acidity meter; 314-Ultraviolet component; 3141-First ultraviolet lamp; 3142-Second ultraviolet lamp; 3143-Quartz protective tube; 315-Micro-nano bubble dissolved air water inlet; 316-Pressure monitoring component; 3161-Pressure gauge; 3162-Safety valve;

[0056] 320 - Air flotation mechanism; 321 - Gas-liquid mixing pump; 3211 - Liquid inlet; 3212 - Liquid outlet; 3213 - Output section; 322 - Air pump; 323 - Flow monitoring device;

[0057] 400 - Release mechanism;

[0058] 410 - Monitoring and adjustment assembly; 411 - Telescopic component; 412 - Rotating component; 413 - Image collector;

[0059] 420-Micro-nano bubble releaser;

[0060] 500-Wastewater pump. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application and how they solve the aforementioned technical problems will be clearly and completely described below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0063] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0064] Wastewater from industries such as printing and dyeing, papermaking, chemicals, and pharmaceuticals is characterized by large volume, high concentration, strong toxicity, and poor biodegradability. High-concentration industrial wastewater is usually treated using Fenton technology, adsorption technology, and air flotation technology.

[0065] In related technologies, wastewater treatment devices include a micro / nano bubble generator, a steam heater, and a high-temperature reactor containing various reagents and catalysts. The micro / nano bubble generator draws wastewater from a bubble-forming tank, generating wastewater filled with micro / nano bubbles, which is then pumped back into the bubble-forming tank to form a cycle. The wastewater from the bubble-forming tank is then pumped into the steam heater, where it is heated and then sprayed through micro / nano bubble nozzles into the high-temperature reactor for further treatment. The effluent from the high-temperature reactor enters a flocculation and sedimentation tank, where pollutants are removed through flocculation and sedimentation. However, the catalysts in these wastewater treatment devices are difficult to separate and reuse.

[0066] Therefore, this application provides a wastewater treatment device, including a tank, a collection mechanism, and at least one treatment structure. The treatment structure includes a Fenton reaction mechanism and a flotation mechanism. The tank contains a flotation zone and a separation zone that are interconnected. The Fenton reaction mechanism is located on the outer wall of the tank and communicates with the flotation zone, allowing the wastewater oxidized by the Fenton reaction mechanism to be transported to the flotation zone. A portion of the flotation mechanism is located within the flotation zone, allowing the micro-nano bubbles generated by the flotation mechanism to perform solid-liquid separation on the wastewater entering the flotation zone. A separation mechanism is provided in the separation zone, and a sludge discharge port is provided on the tank that communicates with the separation zone. After the wastewater from the flotation zone to the separation zone is separated by the separation mechanism, some of the mixed flocs settle and fall into the sludge discharge port for discharge. A deflocculation component and a collection component are sequentially connected to the sludge discharge port, allowing the mixed flocs in the sludge discharge port to be deflocculated by the deflocculation component, and then the catalyst in the mixed flocs is captured and collected by the collection component. Therefore, in the wastewater treatment process, the catalyst added to the Fenton reaction mechanism can be separated and recovered through a collection mechanism, thereby realizing the reuse of the catalyst.

[0067] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0068] like Figure 1As shown in the figure, this application provides a wastewater treatment device, including a tank 100, a collection mechanism 200 disposed on the tank 100, and at least one treatment structure 300, the treatment structure 300 including a Fenton reaction mechanism 310 and an air flotation mechanism 320.

[0069] Both the Fenton reaction mechanism 310 and the flotation mechanism 320 are connected to the tank 100. The tank 100 has an interconnected flotation zone 110 and a separation zone 120. The Fenton reaction mechanism 310 is used to oxidize wastewater and transport the oxidized wastewater to the flotation zone 110.

[0070] The air flotation mechanism 320 is located within the air flotation zone 110. The air flotation mechanism 320 is used to generate micro-nano bubbles, which are used to separate the solid and liquid components of the wastewater within the air flotation zone 110.

[0071] The separation zone 120 is equipped with a separation mechanism 121, which is used to separate the mixed flocs in the wastewater entering the separation zone 120.

[0072] The housing 100 is provided with at least one sludge discharge port 141 that communicates with the separation zone 120. The sludge discharge port 141 is used to discharge the precipitated mixed flocs.

[0073] The collection mechanism 200 includes a deflocculation component 210 and a collection component 220 connected in sequence. The deflocculation component 210 is connected to the sludge discharge port 141. The collection component 220 is configured to capture and collect the catalyst in the mixed flocs after the deflocculation component 210 deflocculates the mixed flocs.

[0074] In this application, specifically, the housing 100 has an interconnected flotation zone 110 and a separation zone 120. The Fenton reaction mechanism 310 is located on the outer wall of the housing 100 and is connected to the flotation zone 110 inside the housing 100. The flotation mechanism 320 is located at the bottom of the housing 100 and partially extends into the flotation zone 110 inside the housing 100. The separation mechanism 121 is located above the separation zone 120, and a sludge discharge port 141 is located below the separation zone 120. The collection mechanism 200 is entirely located on the outer wall of the housing 100. The collection mechanism 200 includes a connected deflocculation component 210 and a collection component 220, and the deflocculation component 210 is connected to the sludge discharge port 141.

[0075] The Fenton reaction mechanism 310 is connected to the wastewater pump 500 to inject wastewater to be treated into the Fenton reaction mechanism 310.

[0076] In practical applications, chemical agents and catalysts are added to the Fenton reaction mechanism 310 to mineralize the recalcitrant organic pollutants in the wastewater, resulting in the formation of mixed flocs containing sludge and catalysts in the wastewater. After the reaction is completed, the mixed flocs and the oxidized wastewater flow together into the flotation zone 110. The flotation mechanism 320 is used to generate micro-nano bubbles and introduce them into the flotation zone 110, so that the micro-nano bubbles collide and adhere with the mixed flocs to be removed, forming a flocculated bubble aggregate with a total density less than that of water. Under the action of buoyancy, the aggregate floats to the water surface, forming a scum layer, thereby achieving efficient solid-liquid separation of the wastewater. Furthermore, the scum layer flows to the separation zone 120, where the scum is separated from the wastewater by the separation mechanism 121.

[0077] It should be noted that the tank 100 is equipped with a slag outlet and a treated water outlet.

[0078] Understandably, the slag outlet is used to discharge the scum separated by the separation mechanism 121 to avoid affecting the quality of the effluent. After the scum is discharged, it is transported in a unified manner for centralized separation and collection of the catalyst. The treated water outlet is used for the wastewater separated by the separation mechanism 121 to flow out of the tank 100 for the next stage of purification treatment.

[0079] In practical applications, some of the mixed flocs do not collide with or adhere to the micro-nano bubbles, and fall into the sludge discharge port 141 below the separation zone 120 under their own gravity.

[0080] Furthermore, the deflocculation component 210 separates the sludge and catalyst from the mixed flocs in the sludge discharge port, i.e., deflocculation is performed; then the collection component 220 captures and collects the catalyst. In this way, during the wastewater treatment process, the catalyst added to the Fenton reaction unit 310 is separated and recovered through the collection mechanism 200, thereby realizing the reuse of the catalyst.

[0081] In some embodiments, the deflocculation assembly 210 includes a deflocculator 211 and a sludge collection tank 212, and the collection assembly 220 includes a magnetic drum 221, a scraper 222 and a catalyst collection hopper 223; the inlet of the deflocculator 211 is connected to the sludge discharge port 141, the magnetic drum 221 is rotatably disposed at the outlet of the deflocculator 211, and the sludge collection tank 212 is disposed between the outlet and the magnetic drum 221, the sludge collection tank 212 is used to collect sludge in the mixed flocs; the magnetic drum 221 is used to capture the catalyst.

[0082] The catalyst collection hopper 223 has an opening, one end of a scraper 222 is disposed on the opening, and the other end of the scraper 222 contacts the magnetic drum 221 so that the catalyst falls into the interior of the catalyst collection hopper 223 through the scraper 222.

[0083] In this embodiment of the application, the catalyst added to the Fenton reaction mechanism 310 is, for example, sludge-based magnetic biochar. Specifically, it uses biomass sludge from a wastewater treatment plant as the carbon source carrier, and Fenton iron sludge and pickling wastewater as the magnetic source and transition metal source. After grinding and pulverizing the dried mixture of biomass sludge from the wastewater treatment plant, Fenton iron sludge and pickling wastewater using a ball mill, micro-nano-scale sludge-based magnetic biochar is obtained by pyrolysis. In the Fenton reaction, it can simultaneously play the roles of catalyst, adsorbent and coagulation aid.

[0084] In this application, the sludge discharge port 141 is connected to the inlet of the deflocculator 211. The mixed flocs enter the deflocculator 211 through the sludge discharge port 141. After the mixed flocs are broken up by the high-speed shearing force of the deflocculator 211, the sludge in the mixed flocs is discharged through the sludge collection tank 212, while the catalyst in the flocs becomes free.

[0085] Furthermore, the magnetic drum 221 rotates relative to the deflocculator 211 under the drive of a motor or other driving components, and the magnetic drum 221 is equipped with magnetic rollers or other magnetic components inside, so that the surface of the magnetic drum 221 has magnetic force, and the catalyst is captured and adsorbed to the surface distribution under the magnetic action of the magnetic drum 221 surface.

[0086] Furthermore, a catalyst collection hopper 223 is provided at the post-processing end of the magnetic drum 221. The catalyst collection hopper 223 has an opening, and a scraper 222 is provided at the top of the opening. The scraper 222 is in contact with the adsorption surface of the magnetic drum 221, so that the catalyst adsorbed on the surface of the magnetic drum 221 falls into the catalyst collection hopper 223 under the scraping action of the scraper 222. Subsequently, the catalyst in the catalyst collection hopper 223 is centrally transferred and processed manually.

[0087] In this way, the mixed flocs are deflocculated by setting up the deflocculator 211, and the catalyst is efficiently recovered quickly and conveniently by adsorption of the magnetic catalyst and the magnetic drum 221.

[0088] In some embodiments, the interior of the housing 100 is provided with a clear water zone 130, and the separation zone 120 is located between the flotation zone 110 and the clear water zone 130; a partition plate 131 is provided between the clear water zone 130 and the separation zone 120, and an overflow weir 1311 is provided on the side of the partition plate 131 facing the separation zone 120, the overflow weir 1311 is used to receive part of the wastewater separated by the separation mechanism 121; a guide plate 111 is provided between the separation zone 120 and the flotation zone 110, and an inlet 112 is provided on the side wall of the flotation zone 110 opposite to the guide plate 111, the inlet 112 is used to connect the flotation zone 110 and the Fenton reaction mechanism 310.

[0089] The inlet 3211 and outlet 3212 of the air flotation mechanism 320 are both connected to the clear water zone 130, and the outlet 3212 has at least one output section 3213. The output section 3213 extends into the air flotation zone 110, and micro-nano bubbles enter the air flotation zone 110 from the outlet 3212 through the output section 3213.

[0090] The separation mechanism 121 is located above the separation zone 120, and the bottom of the separation zone 120 is provided with a sludge hopper 140, with the sludge discharge port 141 located on the sludge hopper 140.

[0091] In this application, the interior of the housing 100 is provided with a clear water zone 130, and the separation zone 120 is located between the air flotation zone 110 and the clear water zone 130. The clear water zone 130 is used to hold the amount of water required by the air flotation mechanism 320 to generate micro-nano bubbles.

[0092] A partition plate 131 is provided between the clear water zone 130 and the separation zone 120, which encloses the space below the two zones while allowing the space above them to communicate with each other. A guide plate 111 is provided between the separation zone 120 and the flotation zone 110. For example, the guide plate 111 is inclined from the flotation zone 110 to the separation zone 120. In addition, an inlet 112 is provided on the side wall of the flotation zone 110 opposite to the guide plate 111. The inlet 112 is connected to the outlet of the Fenton reaction mechanism 310.

[0093] In practical applications, the flotation mechanism 320 is installed on the outer wall of the housing 100, and the inlet 3211 and outlet 3212 of the flotation mechanism 320 are both connected to the clear water zone 130. The outlet 3212 has at least one output section 3213. For example, the output section 3213 is a guide pipe connected to the outlet 3212, and the guide pipe extends into the flotation zone 110. Specifically, the flotation mechanism 320 draws water from the clear water zone 130 through the inlet 3211 to generate micro-nano bubbles. The micro-nano bubbles flow into the flotation zone 110 through the guide pipe. After the wastewater and mixed flocs are oxidized by the Fenton reaction mechanism 310, they enter the flotation zone 110 through the inlet 112 and flow into the separation zone 120 in large quantities under the buoyancy of the micro-nano bubbles. The mixed flocs and wastewater are separated by the separation mechanism 121 in the separation zone 120.

[0094] Understandably, the treated water outlet is located on the separation zone 120 so that the separated wastewater can flow out of the tank 100 for the next stage of purification treatment.

[0095] Furthermore, an overflow weir 1311 is provided on the side of the separator 131 facing the separation zone 120. Part of the wastewater after separation from the mixed flocs flows out through the treated water outlet, and part flows into the clear water zone 130 through the overflow weir 1311 to supplement the water consumed by the air flotation mechanism 320 in the clear water zone 130. In this way, it is not necessary to set up a separate liquid inlet unit for the air flotation mechanism 320, so as to make the structure compact.

[0096] Furthermore, a sludge hopper 140 is provided at the bottom of the separation zone 120. For example, the sludge hopper 140 is a conical or pyramidal structure, and the sludge discharge port 141 is located on the sludge hopper 140. The precipitated mixed flocs sink into the bottom of the separation zone 120 and accumulate in the sludge hopper 140, and are discharged one by one through the sludge discharge port 141.

[0097] In some implementations, a multi-functional water quality monitor 132 is installed in the clear water zone 130 to monitor water quality indicators such as suspended solids, total phosphorus, and chemical oxygen demand in the treated wastewater in real time.

[0098] In this embodiment of the application, for example, the box 100 is provided with two air flotation zones 110 and two separation zones 120 inside, and the clear water zone 130 is located in the middle of the box 100. The two sides of the clear water zone 130 are the separation zone 120 and the air flotation zone 110 that are interconnected.

[0099] It is understandable that the Fenton reaction mechanism 310 and the flotation zone 110 are set up in a one-to-one correspondence, that is, there are two Fenton reaction mechanisms 310. In addition, the outlet 3212 of the flotation mechanism 320 is provided with an output section 3213 that extends into the two flotation zones 110 respectively. In this way, water is introduced into the tank 100 from the Fenton reaction mechanisms 310 on both sides, and the clear water zone 130 simultaneously provides micro-nano bubbles to the flotation zones 110 on both sides. In this way, the method of water inlet at both ends and water outlet in the middle effectively reduces the difficulty of laying out multiple Fenton reactors on the outer wall of the tank 100, and also reduces the footprint and construction cost of the wastewater treatment system.

[0100] It should be noted that the number of Fenton reaction mechanisms 310 is given only as an example, and can be adapted to actual usage needs. This application embodiment does not limit this.

[0101] In some embodiments, the air flotation mechanism 320 includes a gas-liquid mixing pump 321, an air pump 322, a flow monitoring device 323, and a flow control device; the inlet 3211 and the outlet 3212 are both provided on the gas-liquid mixing pump 321, and the gas-liquid mixing pump 321 is connected to the air pump 322.

[0102] Both the flow monitoring device 323 and the gas-liquid mixing pump 321 are electrically connected to the flow control device, and the flow monitoring device 323 is installed on the liquid outlet 3212. The flow monitoring device 323 is used to monitor the amount of bubbles generated at the liquid outlet 3212. The flow control device is configured to increase the liquid inlet flow rate at the liquid inlet 3211 when the amount of bubbles generated is less than the preset amount of bubbles generated.

[0103] In this application, the inlet 3211 and outlet 3212, which are connected to the clear water zone 130, are both installed on the gas-liquid mixing pump 321, and the gas-liquid mixing pump 321 is connected to the air pump 322. Specifically, the gas-liquid mixing pump 321 is used to draw liquid from the clear water zone 130, and the air pump 322 provides gas at a specific pressure to the gas-liquid mixing pump 321 so that the gas and the liquid in the gas-liquid mixing pump 321 are fully mixed and a large number of micro-nano bubbles are generated. The micro-nano bubbles then flow out from the outlet 3212 to the air flotation zone 110.

[0104] In actual use, a flow monitoring device 323 is also provided on the liquid outlet 3212. The flow monitoring device 323 is used to monitor the amount of bubbles generated at the liquid outlet 3212. The flow monitoring device 323, the gas-liquid mixing pump 321 and the flow control device are electrically connected. When the amount of bubbles generated monitored by the flow monitoring device 323 is less than the preset amount of bubbles generated, the control device controls the liquid inlet 3211 of the gas-liquid mixing pump 321 to increase the amount of micro-nano bubbles generated in the gas-liquid mixing pump 321.

[0105] Among them, the flow monitoring component 323 and the flow control component are both circuit control elements integrated into the entire wastewater treatment system. The control component can be an embedded controller or a single-chip microcomputer controller, etc.

[0106] It should be noted that the preset bubble generation amount is related to the number of mixed flocs entering the flotation zone 110, ensuring that the mixed flocs float to the separation zone 120 to the maximum extent under the flotation effect of micro-nano bubbles. The specific amount can be adaptively set according to actual needs, and this application embodiment does not limit it.

[0107] In some embodiments, the flotation mechanism 320 also includes an ozone generator, which replaces oxygen micro-nano bubbles with ozone micro-nano bubbles, thereby coupling the wastewater treatment process with Fenton reaction, Fenton-like reaction, micro-nano bubble oxidation reaction, ozone catalytic oxidation reaction, adsorption reaction and micro-nano flotation separation, so as to further improve the decomposition, adsorption and removal of pollutants in wastewater.

[0108] In some embodiments, this application further includes a release mechanism 400, which includes a motion control component, a monitoring and adjustment component 410, and a micro / nano bubble releaser 420; the monitoring and adjustment component 410 includes a telescopic component 411, a rotating component 412, and an image collector 413, all of which are electrically connected to the motion control component.

[0109] The telescopic component 411, the rotating component 412 and the micro-nano bubble releaser 420 are connected in sequence. The end of the telescopic component 411 that is away from the rotating component 412 is connected to the output section 3213. After passing through the output section 3213, the telescopic component 411 and the rotating component 412, the micro-nano bubbles are released by the micro-nano bubble releaser 420.

[0110] Image collector 413 is positioned above air flotation zone 110 to capture the rising velocity of micro- and nano-bubbles.

[0111] The motion control component is configured to control the telescopic component 411 to extend or retract relative to the output section 3213 or control the rotating component 412 to rotate when the rising speed is less than the preset rising speed, so that the micro-nano bubbles rise at different positions in the air flotation zone 110.

[0112] The motion control component can be an embedded controller or a microcontroller, and is connected to the control system of the entire wastewater treatment system; the image collector 413 is a high-definition camera device, which can be used to observe suspended micron-sized particles, colloids, and bubbles in a fluid environment, and can be used for online, continuous, and in-situ observation.

[0113] In a specific configuration, after the output section 3213 on the outlet 3212 of the air flotation mechanism 320 extends into the air flotation zone 110, a telescopic member 411, a rotating member 412, and a micro / nano bubble releaser 420 are sequentially connected to the output section 3213. For example, the telescopic member 411 is an electric telescopic joint, and the rotating member 412 is an electric rotary joint. The telescopic joint and the rotary joint are sequentially sleeved and connected to the micro / nano bubble releaser 420, and the telescopic member 411, the rotary joint, and the image collector 413 are all electrically connected to the motion control component.

[0114] In practical applications, the image collector 413 is positioned above the air flotation zone 110. After the micro-nano bubbles are released by the micro-nano bubble releaser 420 via the output section 3213, the telescopic component 411, and the rotating component 412, they float above the air flotation zone 110, where the image collector 413 captures the real-time rising speed of the micro-nano bubbles. When the rising speed is less than a preset rising speed, the motion control component controls the telescopic component 411 to extend or retract relative to the output section 3213, thereby positioning the micro-nano bubble releaser 420 at different positions within the air flotation zone 110. Alternatively, the rotating component 412 can be controlled to rotate, adjusting the angle of the micro-nano bubble releaser 420.

[0115] This facilitates the adjustment of the release of micro- and nano-bubbles at different positions in the flotation zone 110, improves the uniformity of the distribution of micro- and nano-bubbles, so that the micro- and nano-bubbles can keep the catalyst in a fully fluidized state and clean the surface of the catalyst, thereby improving its catalytic oxidation effect.

[0116] It should be noted that the preset rising speed of the micro-nano bubbles is related to the size of the mixed flocs entering the flotation zone 110, ensuring that the mixed flocs float to the separation zone 120 to the maximum extent under the flotation effect of the micro-nano bubbles. The specific speed can be adaptively set according to actual needs, and this application embodiment does not limit it.

[0117] In some embodiments, the separation mechanism 121 includes a slag scraper 1211 and a scum trough 1212. The slag scraper 1211 is disposed above the separation zone 120, and the scum trough 1212 is disposed below the slag scraper 1211, and the scum trough 1212 is adjacent to the overflow weir 1311.

[0118] In this application, the slag scraper 1211 includes a scraper and a transmission device. Specifically, the slag scraper 1211 is fixed above the separation zone 120 so that after the micro-nano bubbles and mixed flocs in the flotation zone 110 float to the surface, they are scraped off by the scraper and the mixed flocs are sent into the slag trough 1212 below the slag scraper 1211 by the transmission device.

[0119] It should be noted that the slag outlet on the tank 100 is connected to the scum trough 1212, so that the mixed flocs entering the scum trough 1212 can be discharged through the slag outlet, while the wastewater separated from the mixed flocs flows into the overflow weir 1311, and the rest flows out of the tank 100 through the treated water outlet. In this way, the wastewater and the mixed flocs can be effectively separated.

[0120] In some embodiments, the Fenton reaction mechanism 310 includes a reactor body 311, a plurality of reagent dosing ports 312, and a regulating component 313; the reactor body 311 includes a first mixing pipe section 3111, a second mixing pipe section 3112, and a third mixing pipe section 3113 arranged at intervals, and the first mixing pipe section 3111, the second mixing pipe section 3112, and the third mixing pipe section 3113 are connected to each other through a reaction pipe section 3114.

[0121] Static mixing elements 3115 are provided on the first mixing pipe section 3111, the second mixing pipe section 3112 and the third mixing pipe section 3113, and reagent dosing ports 312 are respectively provided on the first mixing pipe section 3111 and the second mixing pipe section 3112.

[0122] The regulating component 313 includes an alkali inlet 3131, a coagulant inlet 3132, and a flocculant inlet 3133, which are sequentially arranged on the third mixing pipe section 3113.

[0123] In this application, specifically, each mixing pipe section is connected to the reaction pipe section 3114 via flanges, and each mixing pipe section is equipped with a static mixing element 3115, so that the reactor body 311 can achieve a multi-stage Fenton reaction. Through the multi-stage Fenton reaction, the degradation efficiency of wastewater can be improved, the wastewater treatment can be more thorough, and the reaction rate can be accelerated and the treatment time can be shortened.

[0124] Furthermore, the first mixing section 3111 and the second mixing section 3112 are equipped with multiple reagent inlets 312. Specifically, the reagent inlets 312 include an acid inlet 3121, a catalyst inlet 3122, a ferrous sulfate inlet 3123, and a hydrogen peroxide inlet 3124. Each reagent inlet 312 is used to add the corresponding reagent for oxidizing the wastewater. It should be noted that the acid inlet 3121 should be placed first to ensure that the Fenton reaction mechanism 310 is acidic before other reagents are added.

[0125] Furthermore, the third mixing pipe section 3113 is sequentially equipped with an alkali inlet 3131, a coagulant inlet 3132, and a flocculant inlet 3133. The alkali inlet 3131 is used to add an alkaline agent during the Fenton reaction to neutralize the acidic conditions in the reaction system, thereby terminating the Fenton reaction. In addition, under neutral or alkaline conditions after neutralization, residual organic matter and oxidation products in the organic wastewater are more easily precipitated or further degraded, improving the wastewater treatment efficiency.

[0126] The coagulant inlet 3132 and the flocculant inlet 3133 are used to add coagulant and flocculant, respectively. The coagulant is used to coagulate suspended solids, colloids and dissolved substances in wastewater, causing them to aggregate into larger clusters, which facilitates subsequent separation and removal. The flocculant can promote the mutual aggregation between larger particles formed after coagulation, forming larger flocs and improving solid-liquid separation efficiency.

[0127] In some embodiments, a pH meter 3134 is provided at the rear end of the third mixing section 3113 to monitor the specific pH value of the wastewater before it enters the flotation zone 110 in real time.

[0128] In some embodiments, this application further includes an ultraviolet component 314, which includes at least two first ultraviolet lamps 3141, at least one second ultraviolet lamp 3142, and at least one quartz protective tube 3143; the two first ultraviolet lamps 3141 are respectively disposed on opposite sidewalls of the air flotation zone 110.

[0129] The quartz protection tube 3143 is installed in the reaction tube section 3114 between the second mixing tube section 3112 and the third mixing tube section 3113, and the second ultraviolet lamp 3142 is located inside the quartz protection tube 3143.

[0130] In this application, a quartz protection tube 3143 is provided on the reaction tube section 3114 between the second mixing tube section 3112 and the third mixing tube section 3113. For example, the quartz protection tube 3143 is a pressure-resistant quartz tube to protect the second ultraviolet lamp 3142.

[0131] Furthermore, such as Figure 1 and Figure 2 As shown, a first ultraviolet lamp 3141 is provided on the opposite side wall of the air flotation zone 110, and a second ultraviolet lamp 3142 is provided inside the quartz protective tube 3143. In this way, the ultraviolet lamp accelerates and enhances the generation of a large number of hydroxyl radicals by micro-nano bubbles, while stimulating the decomposition of residual hydrogen peroxide. This allows the hydroxyl radicals and the free radicals generated by hydrogen peroxide to work synergistically, improving the utilization efficiency of the reagent and efficiently oxidizing and degrading organic pollutants.

[0132] In some embodiments, this application further includes at least one micro-nano bubble dissolved water inlet 315, which is disposed at one end of the second mixing tube section 3112 toward the third mixing tube section 3113.

[0133] In this application, after the Fenton reaction mechanism 310 completes the multi-stage Fenton reaction on the incoming wastewater, before the alkaline adjustment of the effluent, a micro-nano bubble dissolved air water inlet 315 is set on the reaction pipe section 3114 to introduce micro-nano bubble dissolved air water during the coagulation stage. This allows the mixed flocs to be wrapped by a large number of micro bubbles, making the mixed flocs looser. At the same time, a large number of micro bubbles generated by the Fenton reaction directly enter the flotation zone 110, forming a semi-spontaneous flotation process, which improves the flotation separation effect and also reduces the amount of micro-nano bubbles introduced into the flotation zone 110, thus reducing the system energy consumption.

[0134] In some embodiments, this application further includes a pressure monitoring component 316, which includes a pressure gauge 3161 and a safety valve 3162, which are spaced apart at one end of the first mixing section 3111 toward the reaction section 3114.

[0135] In this application, as Figure 2 As shown, the first mixing pipe section 3111 is equipped with a pressure gauge 3161 and a safety valve 3162. The pressure gauge 3161 is used to monitor the system pressure in the Fenton reaction mechanism 310 in real time. When the system pressure is lower than the set safety pressure, a large number of tiny bubbles generated by the multi-stage Fenton reaction enter the air flotation zone 110. When the system pressure is higher than the set safety pressure, the pressure is released through the safety valve 3162.

[0136] It should be noted that, considering that a large number of tiny bubbles tend to rise in the Fenton reaction mechanism 310 and accumulate in large quantities at the end of the first mixing tube section 3111 facing the reaction tube section 3114, pressure gauge 3161 and safety valve 3162 are set at intervals on this section. The setting positions of pressure gauge 3161 and safety valve 3162 are only given as examples, and it is sufficient to ensure that the pressure value measured by pressure gauge 3161 tends to the maximum pressure value in the Fenton reaction mechanism 310.

[0137] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0138] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the scope of this application is limited only by the appended claims.

Claims

1. A wastewater treatment device, characterized in that, It includes a housing, a collection mechanism disposed on the housing, and at least one processing structure, the processing structure including a Fenton reaction mechanism and an air flotation mechanism; Both the Fenton reaction mechanism and the air flotation mechanism are connected to the tank. The tank has an interconnected air flotation zone and a separation zone. The Fenton reaction mechanism is used to oxidize wastewater and transport the oxidized wastewater to the air flotation zone. The air flotation mechanism is located within the air flotation zone. The air flotation mechanism is used to generate micro-nano bubbles, which are used to separate the solid and liquid components of the wastewater within the air flotation zone. The separation zone is equipped with a separation mechanism, which is used to separate the mixed flocs in the wastewater entering the separation zone; The box body is provided with at least one sludge discharge port that communicates with the separation zone, and the sludge discharge port is used to discharge the precipitated mixed flocs; The collection mechanism includes a deflocculation component and a collection component connected in sequence, and the deflocculation component is connected to the sludge discharge port. The collection component is configured to capture and collect the catalyst in the mixed floc after the deflocculation component deflocculates the mixed floc. The interior of the housing is provided with a clear water zone, and the separation zone is located between the air flotation zone and the clear water zone; the inlet and outlet of the air flotation mechanism are both connected to the clear water zone, and the outlet has at least one output section that extends into the air flotation zone, through which the micro-nano bubbles enter the air flotation zone; wherein, the inlet of the air flotation mechanism draws water from the clear water zone to generate micro-nano bubbles; The deflocculation assembly includes a deflocculator and a sludge collection tank, and the collection assembly includes a magnetic drum, a scraper and a catalyst collection hopper. The inlet of the deflocculator is connected to the sludge discharge port, the magnetic drum is rotatably mounted on the outlet of the deflocculator, and the sludge collection tank is located between the outlet and the magnetic drum. The sludge collection tank is used to collect sludge from the mixed flocs; the magnetic drum is used to capture the catalyst. The catalyst collecting hopper has an opening, one end of the scraper is disposed on the opening, and the other end of the scraper contacts the magnetic drum, so that the catalyst falls into the interior of the catalyst collecting hopper through the scraper; The device also includes a release mechanism, which includes a motion control component, a monitoring and adjustment component, and a micro / nano bubble releaser. The monitoring and adjustment assembly includes a telescopic component, a rotating component, and an image collector, all of which are electrically connected to the motion control component. The telescopic component, the rotating component, and the micro-nano bubble releaser are connected in sequence. The end of the telescopic component facing away from the rotating component is connected to the output section. The micro-nano bubbles are released by the micro-nano bubble releaser after passing through the output section, the telescopic component, and the rotating component. The image collector is positioned above the air flotation zone to capture the rising velocity of the micro- and nano-bubbles. The motion control component is configured to, when the rising speed is less than a preset rising speed, control the telescopic component to extend or retract relative to the output section or control the rotating component to rotate, so that the micro-nano bubbles rise at different positions in the air flotation zone.

2. The wastewater treatment device according to claim 1, characterized in that, A partition plate is provided between the clear water zone and the separation zone, and an overflow weir is provided on the side of the partition plate facing the separation zone. The overflow weir is used to collect part of the wastewater after separation by the separation mechanism. A guide plate is provided between the separation zone and the air flotation zone. An inlet is provided on the side wall of the air flotation zone opposite to the guide plate. The inlet is used to connect the air flotation zone and the Fenton reaction mechanism. The separation mechanism is located above the separation zone, and a sludge hopper is provided at the bottom of the separation zone, with the sludge discharge port located on the sludge hopper.

3. The wastewater treatment device according to claim 2, characterized in that, The air flotation mechanism includes a gas-liquid mixing pump, an air pump, a flow monitoring device, and a flow control device; Both the liquid inlet and the liquid outlet are located on the gas-liquid mixing pump, and the gas-liquid mixing pump is connected to the gas pump. The flow monitoring device and the gas-liquid mixing pump are both electrically connected to the flow control device, and the flow monitoring device is installed on the liquid outlet. The flow monitoring device is used to monitor the amount of bubbles generated at the liquid outlet. The flow control element is configured to increase the liquid inlet flow rate when the bubble generation rate is less than a preset bubble generation rate.

4. The wastewater treatment device according to claim 2, characterized in that, The separation mechanism includes a slag scraper and a scum trough. The slag scraper is located above the separation zone, and the scum trough is located below the slag scraper and is adjacent to the overflow weir.

5. The wastewater treatment apparatus according to any one of claims 1-4, characterized in that, The Fenton reaction mechanism includes a reactor body, multiple reagent dosing ports, and a regulating component; The reactor body includes a first mixing pipe section, a second mixing pipe section, and a third mixing pipe section arranged at intervals, and the first mixing pipe section, the second mixing pipe section, and the third mixing pipe section are connected through a reaction pipe section; Static mixing elements are provided on the first mixing pipe section, the second mixing pipe section and the third mixing pipe section, and the reagent dosing port is respectively located on the first mixing pipe section and the second mixing pipe section; The regulating component includes an alkali inlet, a coagulant inlet, and a flocculant inlet, which are sequentially arranged on the third mixing pipe section.

6. The wastewater treatment apparatus according to claim 5, characterized in that, It also includes an ultraviolet (UV) component, which comprises at least two first UV lamps, at least one second UV lamp, and at least one quartz protective tube; The two first ultraviolet lamps are respectively disposed on opposite sidewalls of the air flotation zone; The quartz protective tube is sleeved in the reaction tube section between the second mixing tube section and the third mixing tube section, and the second ultraviolet lamp is located inside the quartz protective tube.

7. The wastewater treatment apparatus according to claim 5, characterized in that, It also includes at least one micro-nano bubble dissolved water inlet, which is located at one end of the second mixing pipe section facing the third mixing pipe section.

8. The wastewater treatment apparatus according to claim 5, characterized in that, It also includes a pressure monitoring component, which includes a pressure gauge and a safety valve, the pressure gauge and the safety valve being spaced apart at one end of the first mixing section toward the reaction section.

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