A separation and purification method of ammonium sulfate and sodium sulfate mixed solution in the regeneration process of flue gas desulfurizer
A regeneration process and mixed solution technology, applied in chemical instruments and methods, ammonium sulfate, ion exchange regeneration, etc., can solve problems such as large consumption of raw materials, difficult process control, uneconomical, etc., and achieve high comprehensive utilization of resources. , Great practicability and extensiveness, no effect of waste residue and waste liquid discharge
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Embodiment 1
[0039] 1) The gel-type cation exchange resin Seplite LSI-010 is filled in the exchange column by wet method. First, the resin is washed with deionized water at a flow rate of 6BV / h until the pH of the effluent is 7-9, and then the volume is 4BV. The ammonium bicarbonate solution with a molar concentration of 1mol / L rinses the resin at a flow rate of 1.5BV / h, and finally washes the resin with deionized water at a flow rate of 6BV / h until the pH value of the effluent is 7-9 to obtain NH 4 + Type cation exchange resin.
[0040] 2) Put NH 4 + The cation exchange resin is wet-packed in the cation exchange column. At room temperature, the double salt solution of the regeneration by-product with a pH of 5 is passed through the resin bed at a flow rate of 3 BV / h. + NH combined with resin 4 + Exchange reaction occurs, collect the ammonium sulfate effluent at the bottom of the column, and use Na in the ammonium sulfate effluent + When the concentration reaches 5mg / L as the end point, the col...
Embodiment 2
[0041] Example 2: Scale-up experiment
[0042] 1) The macroporous cation exchange resin Amberlite FPC22Na is filled in the exchange column by wet method. First, the resin is washed with deionized water at a flow rate of 8BV / h until the pH of the effluent is 7-9, and then 5BV with a molar concentration of The 1.5mol / L ammonium bicarbonate solution rinses the resin at a flow rate of 1.5BV / h, and then deionized water washes the resin at a flow rate of 8BV / h until the pH of the effluent is 7-9 to obtain NH 4 + Type cation exchange resin.
[0043] 2) Fill the two exchange columns with 120 mL of wet resin (i.e. NH 4 + Type cation exchange resin), and then connect the two exchange columns in series, and pass the double salt solution with a pH of 6 through the resin bed at a flow rate of 2BV / h. When the effluent of the second exchange column contains Na + When the concentration reaches 5mg / L, stop the operation, regenerate the resin in the two columns, and start the second batch of purifica...
Embodiment 3
[0045] 1) The macroporous cation exchange resin Amberlite FPC 22Na is filled in the exchange column by wet method. First, the resin is washed with deionized water at a flow rate of 6BV / h until the pH of the effluent is 7-9, and then the volume is 3BV, The ammonium sulfate solution with a molar concentration of 2mol / L rinses the resin at a flow rate of 2BV / h, and then deionized water washes the resin at a flow rate of 6BV / h until the pH of the effluent is 7-9 to obtain NH 4 + Type cation exchange resin.
[0046] 2) Put NH 4 + The cation exchange resin is wet-packed in the cation exchange column. At room temperature, the double salt solution of the regeneration by-product with a pH of 7 is passed through the resin bed at a flow rate of 8 BV / h. + NH combined with resin 4 + Exchange reaction occurs, collect the ammonium sulfate effluent at the bottom of the column to obtain the Na in the effluent + The concentration reached 5mg / L as the end point. The ion exchange capacity Q of Amberli...
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