Process Optimization Design And Application Of Dust Treatment Process In Molecular Sieve Production Workshop Based On Cloud-dedusting Technology

With the accelerating process of industrialization,the industrial dust pollution is getting more and more serious,as industrial dust contains a great number of chemical and biological toxic substances,which pose a great threat to human health,especially for on-site workers.As far as the current situation is concerned,most of existing dedusting equipment have challenge to remove efficiently the fine dust pollution generated in the factory’s production plant,and the problem of air purification in the production plant of the factory is worth further study and attention.Cloud-dedusting technology has been successfully applied to the treatment of factory exhaust gas and production dust with features such as high efficiency,stability and easy to operate.The new dust removal technology combines particle coagulation and growth with cyclone dust removal technology to build a humidity supersaturation environment before a conventional cyclone dust collector,so that fine particulate matter is condensed and grown over there.And it is collected under the cyclone dust collector in the high-gravity environment to further improve the dust removal efficiency of the tradition cyclone dust collector.In this paper,the Cloud-dedusting technology has applied to dust discharge in the production plant of Lanzhou Petrochemical Molecular Sieve Feeding Plant.Through the optimization of the system process and on-site pilot test,to investigate the effects of atomization pressure,fan frequency,system pressure drop,and the addition of demisters on the dust removal efficiency of the Cloud-dedusting Technology.Make it achieve the optimal effect to control the escape dust pollution in the production workshop.The research of the project is divided into three parts:Firstly,this paper studied physical property analysis for dust removal objects(Pseudo-Boehmite and Molecular Sieve).Measurements on such properties,including the particle size,wettability,and the repose angle of the dust,provide the prerequisites of latter the Cloud-dedusting System design and application.Secondly,Based on a comprehensive analysis of the specific production conditions and actual pollution conditions of the molecular sieve feeding plant and the existing dust removal methods,the entire dust removal system is optimized for design and reconstruction,and the Cloud-dedusting System is used to replace the existing dust removal equipment to collect the dust of the feeding workshop.Finally,based on on-site pilot test,this paper also studied the effects of atomizing water pressure,atomizing air pressure,fan frequency,and the addition of demister on the outlet concentration of the Cloud-dedusting system.Form the results,we can achieve the best performance on dust removal under the condition with 0.12 MPa of the atomization pressure of the cloud dust removal system,0.5 MPa of the atomization pressure,42 Hz of the fan frequency,and about 2.63 KPa of the pressure drop of the cloud dust removal system.In general,The sideline pilot test results show that through optimization of the design and application of the Cloud-dedusting system,the production dust pollution of the Lanzhou Petrochemical molecular sieve plant has been effectively solved.The dust concentration of the effluent can reach the latest "Petrochemical Industry Pollutant Emission Standard(GB 31571-2015)".This high efficiency and low energy dust removal method provides a new solution for the treatment of dust pollution in industrial production plants.