All-fiber Impurity Collector Based On Laser-induced Microbubble

The method of adhering suspended particles in a liquid by using microbubbles mixed in a liquid as a carrier is called an air floatation method,which is to produce microbubbles in a liquid to form a mixture of liquid,gas and impurities.Under the action of interfacial tension,the impurities are caused to adhere to the microbubbles.Due to its high efficiency,low introduction of impurities and low secondary pollution,it is widely used in the domestic and industrial wastewater treatment industries.However,there are few studies on the treatment of impurities in micro-liquid environments by air-floating method.The main reason is that it is difficult to produce microbubbles as a carrier adhesion contaminant in a micro-liquid environment.As an emerging means of manipulating particles,the aperture is convenient and flexible to use,and can realize high-precision operation on the order of micrometers.It can be used as the generation and operation of microbubbles in a micro-liquid environment.At present,the research on the generation of microbubbles based on fiber optics requires complex pretreatment of the fiber probe end face,such as metal coating or carbon material doping,which limits the application of these methods in real life.In this paper,an all-fiber impurity collector based on laser-induced microbubbles is proposed and constructed for the treatment of micro-liquid wastewater environment.The fiber-optic probe does not have any special pretreatment,and the proposed impurity collector generates microbubbles in the sewage droplets to complete the collection and extraction of sewage impurities.The optimal incident laser power of the impurity collector is 11mW.At this time,the impurity collection effect is the best,and the maximum diameter that the microbubble can reach is 140?m.The device has simple manufacturing process,convenient and flexible operation,environmental protection and high efficiency,and expands the potential application of the fiber optic diaphragm technology in the field of sewage treatment.This article is described in detail as follows:First,the development of air flotation and the type of process are introduced.At the same time,the common methods of producing microbubbles are introduced,and the application of microbubbles in different fields is described.Then the development and application of the diaphragm are introduced in detail,and the method and application of generating microbubbles based on fiber optic diaphragm technology are demonstrated.Second,the working principle is explained,the physical process is analyzed,and the functional design is completed.The basic principle of heat transfer,the basic principle of air floatation and the basic principles of fluid dynamics are introduced in detail,which provides a theoretical basis for the experiment.The physical process was simulated and simulated by ComsolL Multiphysics software to verify the feasibility of the experimental scheme.Third,according to the experimental requirements,select the experimental equipment with appropriate parameters,configure the experimental solutions of different concentrations,determine the selection criteria of the laser source,and select the laser of the appropriate wavelength.The construction of the experimental system was completed,including the preparation of the fiber probe,the parameter modulation of the optical path coupling,and the optimization of the device.Fourth,the impurity collector based on single-mode fiber optic diaphragm was introduced and the sewage treatment experiment was carried out.Then,the impurity collector based on the hollow double-suspended core fiber was discussed in detail,and the microbubble generation experiment was carried out to verify the factors affecting the growth of microbubbles and the effect of impurity collection.Finally,the microbubbles were successfully formed in the oil solution to complete the sewage treatment.