Experimental Study On Prolysis Regeneration Process And Low Pressure Arc Initiation Regeneration Of Saturated Biological Activated Carbon

With the increasingly serious micro-pollution of drinking water sources in China,more and more activated carbons are put into the advanced treatment of drinking water.Bio-activated carbon technology is a commonly used advanced treatment technology for water treatment in China.Bio-activated carbon will lose its adsorption capacity after a certain number of years of use and become saturated bio-activated carbon.Saturated activated carbon can be recycled through regeneration.Thermal regeneration is currently the most widely used technology in industry,but there are problems such as high regeneration cost,large carbon loss,thermal pollution and serious decline in mechanical strength of carbon.Other treatment methods of saturated activated carbon are more unfavorable to environment,energy and economic benefits.This paper explores a new type of regeneration technology,which is called low pressure arc regeneration technology and gradually applied to industrial application,aiming to solve the problems existing in the current saturated activated carbon treatment market in China.Biological activated carbon has high representative research significance.This paper focuses on the pyrolysis process and low-pressure arc initiation regeneration of saturated biological activated carbon,and carries out the following aspects of work:(1)Through the apparent density of macroscopic analysis,industrial analysis of the physical properties of saturated biological activated carbon,using electron microscopic scanning and microscopic analysis,energy spectrum analysis on the surface of activated carbon by simultaneous thermal analysis,infrared spectrometer,tube furnace,such as instrument,by comparing the new activated carbon adsorption and single organic phenol saturated carbon,the pyrolysis process of saturated biochar characteristics is studied,The pyrolysis of adsorbents,surface functional groups and biofilms was analyzed.The effects of heating rate and holding time on the regeneration of activated carbon were investigated.The optimal heat regeneration condition was heating rate 20K/min and holding time 15 min.The regeneration performance parameters such as strength,yield,recovery rate and PH were measured.(2)By using analytical thermodynamics,relatively accurate results were obtained from two operation modes of single scan rate method and multiple scan rate method,and the pyrolysis process of saturated biological activated carbon was further studied.Through comprehensive analysis of its pyrolysis process,theoretical guidance was provided for thermal regeneration and low-pressure arc initiation regeneration.(3)In the prophase research explore the miniaturization regeneration device,on the basis of building the new regeneration of miniaturization and demountable device,and through the experimental study on large modular equipment parameters,through the experimental debugging,optimization and experiments,the energy consumption,carbon yield,regeneration parameters to evaluate the performance of regeneration as a result,the device can be applied to industrialization.Finally,a comprehensive analysis of the pyrolysis process of saturated biological activated carbon was completed,a large low-pressure arc-starting regeneration device was successfully built,and the regeneration of saturated biological activated carbon was completed.The energy consumption of regeneration was 0.2275 kw·h/kg,the yield was 95.73%,and the regeneration and recovery rate was above 94%.The regeneration results were far better than thermal regeneration,which could be initially applied to industrialization.