A kind of regeneration method of flue gas desulfurizer
A desulfurization agent and flue gas technology, applied in the field of industrial wastewater utilization, can solve the problems of expanding the universality of sodium bicarbonate desulfurization, high control system precision requirements, difficult crystallization and sweating rates, etc., to make up for high desulfurization costs and overcome precision Demanding and easy-to-use effects
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Embodiment 1
[0029] 1) Weak base gel acrylic resin LX-67 (manufacturer: Xi'an Lanxiao Technology New Material Co., Ltd.) is filled in the exchange column by wet method, and the resin is first washed with deionized water at a flow rate of 6BV / h Until the pH value of the effluent is 7-9, then rinse the resin with a volume of 4BV of ammonium bicarbonate solution with a molar concentration of 1mol / L at a flow rate of 1.5BV / h, and finally wash the resin with deionized water at a flow rate of 6BV / h Until the pH value of the effluent is 7-9, HCO is obtained 3 - type anion exchange resin.
[0030] 2) HCO 3 - Type anion exchange resin is filled in an anion exchange column by wet method. 4 2- Resin-bound HCO 3 - An exchange reaction occurs, and the sodium bicarbonate effluent at the bottom of the column is collected, and the SO in the effluent 4 2- Appear as the end point, stop collecting, and measure the volume of the effluent to be 6.5BV.
Embodiment 2
[0031] Embodiment 2: scale-up experiment
[0032] 1) Fill the weak base gel acrylic resin LX-67 in the exchange column by wet method, first wash the resin with deionized water at a flow rate of 8BV / h until the pH of the effluent is 7-9, and then use 5BV molar The ammonium bicarbonate solution with a concentration of 1.2mol / L rinses the resin at a flow rate of 1.5BV / h, and then washes the resin with deionized water at a flow rate of 8BV / h until the pH of the effluent is 7-9 to obtain HCO 3 - type anion exchange resin.
[0033] 2) Fill each of the two exchange columns with wet resin (i.e. HCO 3 - type anion exchange resin), and then two exchange columns are connected in series, and the sodium bicarbonate desulfurization product double salt solution is passed through the resin bed at a flow rate of 2BV / h. When the SO in the second exchange column effluent liquid 4 2- When it occurs, stop the operation, regenerate the resin in the two columns, and start the second batch of pu...
Embodiment 3
[0035] 1) Fill the weak base gel acrylic resin LX-67 in the exchange column by wet method, first wash the resin with deionized water at a flow rate of 6BV / h until the pH of the effluent is 7-9, and then use a volume of 3BV , The ammonium bicarbonate solution with a molar concentration of 2mol / L rinses the resin with a flow rate of 2BV / h, and then washes the resin with deionized water at a flow rate of 6BV / h until the pH of the effluent is 7-9 to obtain HCO 3 - type anion exchange resin.
[0036] 2) HCO 3 - Type anion exchange resin is filled in an anion exchange column by wet method. At room temperature, the double salt solution of sodium bicarbonate desulfurization product with a pH value of 7 passes through the resin bed at a flow rate of 8BV / h, and the SO 4 2- Resin-bound HCO 3 - The exchange reaction occurs, and the effluent at the bottom of the column is collected, so that the SO in the effluent 4 2- Occurrence is the end point, and the volume of the effluent is d...
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