Clean Printing Technology That Reduces Ammonia Nitrogen Emissions

The hygroscopicity and solubility of urea and urea substitute(three glycerol,glycerol,polyethylene glycol 600 and polyethylene glycol 200)in reactive dye printing were studied.The experimental results showed that the solubilization size was polyethylene glycol 200>polyethylene glycol 600>glycerol>urea>three glycol.When the auxiliary concentration was the same,the moisture absorption of urea substitutes was better than that of urea.At the same time,the effects of urea substitutes on the fabric surface color yield were studied.The experimental results showed that urea substitution couldn't reach the effect of urea in reactive dye printing and could not replace urea directly.The fabric surface color yields under different fixation conditions of conventional dry steaming,wet steaming with urea,wet steaming without urea,high temperature wet steaming without urea and non urea wet steaming for prolonging steam time were researched.The test results showed that when the steam temperature was 130?,the fabric color yield of high temperature wet steaming without urea had reached fabric color yield of conventional dry steaming.Combined with the actual process flow of current printing,the fabric surface color yield and line infiltration phenomenon under foam low water(alkali soaking)two phase method at 102? and 130? were studied.The test results showed that when the steam temperature was 130?,the fabric surface color yield could not only reach fabric color yield of conventional dry steaming,but the infiltration of the printed fabric would not occur.