Industrial Experiment Research On Capture Device Based On Inorganic Membrane Separation Technology

In recent years,there are serious environmental pollution problems with the development of C hina’s industrialization process,especially atmospheric dust pollution which has affected people’s normal life and physical health.Statistics show that industrial emissions are the main so urce of atmospheric dust and it should focus on governance.Therefore,it is important to apply inorganic membrane to environmental protection fields such as gas solid separation in high temperature for the reason that inorganic membrane with the characteristics of high temperature resistance,high pressure resistance,good chemical stability,high mechanical strength,high separation precision,high separation efficiency,antimicrobial resistance and easy regeneration cleaning etc.In this paper,a collection of industrial field emission of soot particles is completed based on inorganic membrane separation technology,so that it can achieve the national standard of smoke and dust emission,and optimize the membrane pollution control system to achieve sustained capture efficient and stable operation.This paper carry out the following research work:1.Optimization design and installation of inorganic membrane capture device for industrial experiment.The capture device adopts triangle distribution evenly distribute on the circular metal pipe plate with Si C tube coated Al₂O₃ film as separation membrane element and totally are 96 inorganic ceramic membrane tubes divided to two groups;The installation and disassembly of capture device is convenient and reliable by the especial design of square structure of main body and membrane module design with a detachable mechanical sealing connection mode;A ejector and an sonic sootblower are introduced to the membrane fouling control system which is a good control of the membrane fouling;Related accessories for automatic control system of induced draft fan,compressed air system are selected,and a capture device is built in a carton factory in Zunyi city.They are captured using a flue gas treatment of its 4t/h coal-fired boiler.2.Measurement and analysis of industrial test parameters of inorganic membrane capture device.Firstly,the basic parameters such as flow rate,temperature and particle size distribution of the flue gas in the boiler used in the industr ial test field are determined.Then,no-load test is conducted,flux and pressure parameters of the device are tested in the condition of air.Finally,measuring the flux,pressure drop,flue gas import and export concentration and the capture efficiency in the condition of burning anthracite coal and biomass fuels separately and compare it to water film dust remover.Experimental results show that the flux of capture device decrease from8200 m³·h^-1to 4100 m³·h^-1,the pressure increase from 3000 Pa to 5100 Pa,dust emission concentration is below 5 mg/m³,the capture efficiency is more than 95%when dealing with the flue gas produced by the burning of anthracite;While dealing with the flue gas produced by combustion of biomass fuel,the flux of capture device decrease from 7600 m³·h^-1to 4000 m³·h^-1,the pressure increase from 3200 Pa to 5500Pa,dust emission concentration is below 6 mg/m³,the capture efficiency is more than97%.3.The optimization of membrane fouling control method of inorganic membrane capture device.First of all,the optimum parameters of two control methods of pulse blowback cleaning and acoustic wave vibration cleaning are optimized,which are mainly determined by pressure and time.Then,find out the best combination of the two methods through the comparison and a nalysis of the cleaning effect,namely is acoustic vibration cleaning 1.0 s under pressure 0.6 MPa,then pulse back blowing 0.7s under pressure 1.2 MPa.Finally,optimizing the optimal combination state of the regeneration cycle time interval and the optimal cycle process of controlling membrane fouling is obtained.That is cycle regeneration between two counter blow valves every 10 min.Thus,high flux,low resistance,high efficiency and stable operation of capture device are achieved.This subject build an inorganic membrane capture device,determination and analysis of the industrial parameters of the capture device,optimize the membrane pollution control method,and get the optimal operating parameters based on the industrial test of inorganic membrane capture device.It has laid the foundation for the application of the inorganic membrane capture device,and accumulate valuable experience.