| Industrial circulating cooling water has been in high temperature operation for a long time,and the water quality is very complex in the open environment,which has a serious impact on the heat exchange equipment and pipes of the system,such as scaling,corrosion and biological slime accumulation caused by microbial growth and propagation.Based on the above reasons,many scholars pay attention to the treatment of industrial circulating cooling water.This article adopts the method of compounding natural and synthetic agents to provide a solution to the scaling and iron oxide deposition of circulating cooling water,and uses PP cotton filters to remove impurities in the cooling water to explore the better conditions for using PP cotton filters.Part of the scale inhibition performance test uses scale inhibition rate as an indicator,using natural agents chitosan and synthetic agents PESA,PASP,HPMA separate experiments to explore the scale inhibition performance of different concentrations,while exploring the best combination of agents under different combinations and different ratios.By changing the temperature,fungicide concentration,and Fe2+concentration,the effects of different factors on the scale inhibition performance of the compound agent were explored.XRD was used to characterize and analyze the scale samples in water before and after adding the best compounding agent,which proved that the compounding agent changed the growth direction and structure of the scale-like crystals to a certain extent.The dispersion performance part explores the use of light transmittance as an indicator to explore the natural agent chitosan and the above three artificial synthetic agents in separate experiments to explore the dispersion efficiency of different concentrations,as well as the best combination of different combinations and different ratios.By changing the temperature,fungicide concentration,and Ca2+concentration,the effects of different factors on the scale inhibition performance of the compound agent were explored.Through a comprehensive comparison with the scale inhibition performance test,it is determined that chitosan and PESA can achieve the best scale inhibition and dispersion effect when the total concentration of50mg/L and the compounding ratio is 4:1.Among them,the scale inhibition rate.It can reach92.61%,and the light transmittance drops to 41.30%.The PP cotton filtration part mainly investigates the filtration effect of PP cotton at different inlet temperature,inlet water flow rate,and inlet water concentration.Through orthogonal test design,the influence degree of each influencing factor on PP cotton filtration effect is analyzed to obtain the best Operating conditions:When the inlet water temperature is25℃,filtering speed is 0.03m/s,and the inlet water concentration is 80mg/L,the removal rate of suspended matter can reach 79.95%.Investigate the effect of cooling water reuse times on the scale inhibition and dispersion properties of the agent,and explore the better cooling water reuse times.The test results will provide a technical basis for the establishment of a circulating cooling water treatment system in the actual project.Compounding agents and PP cotton filtration can effectively solve the problem of circulating cooling water treatment and have broad application prospects. |
