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What are the methods of zero discharge treatment for power plant waste water? Mar 02, 2018


1.The method of zero emission treatment of desulphurization wastewater in a power plant is characterized by the following steps:

Step 1: pretreat wastewater and add pretreatment agents;

Step 2: solid-liquid separation of desulfurization wastewater;

Step 3: further remove the divalent and trivalent fouling ions in desulfurization wastewater;

Step 4: use the nanofiltration principle to concentrate the desulfurization wastewater;

Step 5: the process of reverse osmosis process was carried out by sodium filtration;

Step 6: heat evaporation concentration of high concentration sodium chloride solution;

Step 7: concentrated brine concentrate crystallization dehydration and drying.

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2. According to claim 1 a kind of low power plant desulfurization wastewater zero discharge processing method, its characteristics is described in step 1 pretreatment reagents of sodium hydroxide, removal of the desulfurization wastewater divalent and trivalent fouling ion.

3. According to claim 2 a kind of low power plant desulfurization wastewater zero discharge processing method, its characteristics is described in step 1 pretreatment agent for sodium carbonate, remove the calcium ion in the desulfurization wastewater.

4. According to claim 1 to 3 any a kind of low power plant desulfurization wastewater zero discharge process, its characteristics is described in step 1 also includes adding sodium hypochlorite, used in the inhibition of the desulfurization wastewater microorganism growth.

5. According to claim 1, the treatment method for low consumption of desulphurization wastewater of power plant is characterized by the precision filtration of pretreatment water after step 1.

6. According to claim 1 a kind of low power plant desulfurization wastewater zero discharge process, its characteristics is described in step 2 of the desulfurization wastewater using tubular ultrafiltration membrane for solid-liquid separation.

7. According to claim 1 a kind of low power plant desulfurization wastewater zero discharge process, its characteristics is described in step 3 to remove the divalent and trivalent in the desulfurization wastewater by sodium ion exchanger fouling ions.

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