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CN-122010279-A - Limited domain flow type ultrasonic reinforced ozone oxidation microbubble reactor and application

CN122010279ACN 122010279 ACN122010279 ACN 122010279ACN-122010279-A

Abstract

The invention belongs to the technical field of microreactor and advanced oxidation water treatment, and discloses a finite field flow type ultrasonic enhanced ozone oxidation microbubble reactor and application thereof, comprising an ultrasonic assembly, a conveying assembly and an ozone assembly, the conveying assembly is arranged on the ultrasonic assembly, the ozone assembly is arranged in the conveying assembly, and the reaction liquid containing pollutants flows in the conveying assembly and contacts with ozone microbubbles so as to realize the degradation of the pollutants. The invention solves the problems of the prior ultrasonic-ozone coupling system that the bubble behavior is uncontrollable, the acoustic-gas coupling efficiency is low, the ozone mass transfer and utilization efficiency is bottleneck, and the system is complex, and the economical efficiency and applicability are poor due to the dependence on external conditions.

Inventors

  • WU ZHILIN
  • YANG SIHAN
  • HUANG XUEQING
  • FANG ZEHONG
  • Jiang Baixin
  • DONG ZHENGYA

Assignees

  • 化学与精细化工广东省实验室

Dates

Publication Date
20260512
Application Date
20260410

Claims (9)

  1. 1. A confined flow ultrasonic enhanced ozone oxidation microbubble reactor, comprising: An ultrasonic assembly; The conveying assembly comprises a reaction tube (2) and a connecting tube (3), wherein the outer wall of the reaction tube (2) is tightly coupled with the ultrasonic assembly, the ultrasonic assembly transmits sound waves to a liquid phase in the reaction tube (2), one end of the reaction tube (2) is used as a reaction liquid outlet, the other end of the reaction tube (2) is used as an opposite interface, the connecting tube (3) comprises a main tube (31) and a branch tube (32), the branch tube (32) is arranged on the side surface of the main tube (31), one end of the branch tube (32) is used as a reaction liquid inlet, one end of the main tube (31) is connected with an opposite interface of the reaction tube (2), and the other end of the main tube (31) is closed; Ozone subassembly, including gas-supply pipe (4) and micropore aeration head (5), in micropore aeration head (5) worn to locate reaction tube (2), gas-supply pipe (4) set up in the person in charge (31) of connecting pipe (3), the one end and the micropore aeration head (5) of gas-supply pipe (4) are connected, the other end of gas-supply pipe (4) wears out from being responsible for (31) confined one end, wherein, there is infusion clearance (7) between the outer wall of gas-supply pipe (4) and the inner wall of being responsible for (31), there is limit domain clearance (6) between micropore aeration head (5) and reaction tube (2) inner wall, the infusion clearance passes through the interface and the limit domain clearance intercommunication of reaction tube, form the runner that supplies the reaction liquid to circulate in succession.
  2. 2. The confined flow ultrasonic enhanced ozone oxidation microbubble reactor as set forth in claim 1, characterized by a confined gap (6) of 1.25 mm or less.
  3. 3. The finite flow type ultrasonic-enhanced ozone oxidation microbubble reactor as set forth in claim 1, characterized in that the pore diameter of the microporous aeration head (5) is 1-300 μm.
  4. 4. The finite field flow type ultrasonic intensified ozone oxidation microbubble reactor according to claim 3, wherein the ultrasonic frequency of the ultrasonic transducer (1) is 15 kHz-1 MHz.
  5. 5. The finite field flow type ultrasonic reinforced ozone oxidation microbubble reactor as set forth in any one of claims 1-4, characterized in that the reaction tube (2) is a circular straight tube, the shape of the microporous aeration head (5) is a cylindrical structure, the reaction tube (2) and the microporous aeration head (5) are coaxially arranged, and an annular finite field gap (6) is formed between the inner wall of the reaction tube (2) and the outer wall of the microporous aeration head (5).
  6. 6. The finite field flow type ultrasonic enhanced ozone oxidation microbubble reactor as set forth in claim 5, wherein the inner diameter of the reaction tube (2) is 0.3-25 mm.
  7. 7. The finite field flow type ultrasonic reinforced ozone oxidation microbubble reactor as set forth in claim 1, characterized in that the circumferential side surface of the microporous aeration head (5) and the end surface of the microporous aeration head (5) far from the gas pipe (4) are respectively and uniformly provided with a plurality of micron-sized air holes.
  8. 8. The use of a confined flow ultrasonic enhanced ozone oxidation microbubble reactor according to any one of claims 1-7 in continuous flow treatment of wastewater for degrading organic pollutants.
  9. 9. The use of claim 8, wherein the method for degrading organic pollutants by using the finite field flow type ultrasonic reinforced ozone oxidation microbubble reactor comprises the following steps: S1, inputting reaction liquid to be treated containing organic pollutants into a reactor from a reaction liquid inlet of a branch pipe in a continuous flow mode, and entering a runner of a limiting gap through a transfusion gap; s2, ozone gas is input into a microporous aeration head through a gas pipe, and is continuously injected into the reaction liquid in the limiting gap in a micron-sized bubble mode through a gas hole of the microporous aeration head; S3, starting an ultrasonic assembly, applying ultrasonic waves into the reaction tube, and continuously degrading and mineralizing organic pollutants in the reaction liquid by regulating and controlling the ozone adding amount, the flow rate of the reaction liquid, ultrasonic power and hydraulic retention time.

Description

Limited domain flow type ultrasonic reinforced ozone oxidation microbubble reactor and application Technical Field The invention belongs to the technical field of microreactors and advanced oxidation water treatment, and particularly relates to a finite field flow type ultrasonic reinforced ozone oxidation microbubble reactor and application thereof. Background Ozone degrading pollutants mainly depend on their strong oxidizing power. Ozone molecules can decompose pollutants through two ways, namely, direct oxidative decomposition of the pollutants, ozone attacks unsaturated bonds or specific functional groups in organic molecules, and indirect oxidation of the pollutants, wherein ozone is decomposed into hydroxyl free radicals (OH) with stronger oxidability in water to react with most of the organic matters. The combined technology of ozone and ultrasound shows remarkable advantages in the aspect of treating refractory organic pollutants through the synergistic effect of acoustic cavitation effect and advanced oxidation. The ozone and ultrasonic combined technology generates a local high-temperature and high-pressure environment through cavitation effect, can directly pyrolyze organic matters and crack water molecules to generate hydroxyl free radicals, and can greatly promote the rate and efficiency of ozone decomposition to generate strong-oxidability free radicals. In addition, the crushing and dispersing effects of ultrasonic waves on ozone bubbles solve the core bottlenecks of low mass transfer efficiency and limited solubility of the traditional ozone technology. At present, the traditional ultrasonic-ozone coupling system is mostly carried out in an open or semi-open reactor, ozone bubbles are easy to freely grow and aggregate in a liquid phase, millimeter-sized large bubbles are formed in a multi-shape mode, the problems of short contact time with a water body, low ozone dissolution efficiency and difficult resonance matching of the bubble size and ultrasonic frequency exist, and the strengthening effect of cavitation effect and the utilization efficiency of ozone are severely limited. Among the prior art, patent CN116986708a, which is closest to the present invention, discloses a solar industrial wastewater treatment system of ultrasonic coupling ozone micro-nano bubbles, which comprises an industrial wastewater treatment chamber, an ozone micro-nano bubble generation module, an ultrasonic vibration generation module and a solar energy supply module, wherein the ultrasonic cavitation is utilized to promote pollutant dispersion, and the dissolution and mass transfer efficiency of ozone is improved through the micro-nano bubbles, so as to enhance the oxidative degradation performance. However, the technical scheme has the following core defects that 1. The reaction chamber is of a macroscopic open structure, physical constraint on bubble behaviors is lacking, ozone bubbles are easy to grow freely and aggregate in the reaction chamber and float upwards and escape quickly, the size of the bubbles cannot be stably controlled at a micron level matched with ultrasonic field resonance, the residence time of the bubbles in an ultrasonic action area is extremely short, and the acoustic-gas coupling efficiency is extremely low. 2. The system has complicated structure, relies on a catalyst, a solar power supply unit and a complex monitoring control module, has high equipment manufacturing cost and operation and maintenance difficulty, can not realize continuous efficient coupling of microbubbles and a sound field in a limited space, and is difficult to adapt to continuous flow and compact water treatment scenes. In addition, patent CN114477376A discloses a water treatment device based on an ozone nano micro-bubble 'core injection' overlapping type double hollow fiber membrane technology and an operation method thereof, the system adopts a double-layer hollow fiber membrane structure, nano micro-bubbles are generated when ozone passes through an inner membrane and are in contact reaction with wastewater flowing through a cavity between the membranes, and membrane materials contain transition metals such as Fe, cr or Ni and the like, so that the purpose of catalyzing ozone decomposition, strengthening mass transfer and controlling membrane pollution by utilizing the 'limiting field effect' of membrane holes is achieved. However, the technology has obvious limitations that firstly, the 'limit' mainly refers to the nanoscale space inside a membrane hole, the purpose is to catalyze rather than actively restrict the macroscopic dynamic behavior of bubbles, bubbles still tend to coalesce and escape in a cavity between membranes, continuous regulation and control on the bubble size, movement and collapse process are lacked, secondly, the system completely depends on ozone oxidation and metal catalysis, an ultrasonic cavitation field is not introduced, bubbles cannot be further broken, hydroxyl free radicals are genera