A recycling method for recycled papermaking wastewater with high hardness and high salinity
A papermaking wastewater, high salinity technology, applied in chemical instruments and methods, processing wastewater treatment, water/sewage treatment, etc., can solve problems such as increased operating costs, large chemicals and steam, consumption, etc.
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[0036] The following descriptions are only preferred embodiments of the present invention, and do not limit the scope of protection of the present invention.
[0037] A method for recycling high-hardness and high-salinity recycled paper papermaking wastewater, comprising the following steps:
[0038] 1) Impurity removal treatment step: perform impurity removal treatment on high-hardness and high-salinity wastewater to remove solid particle impurities in it, and choose sand filtration treatment method, multi-media filtration treatment method, flocculation treatment method or clarification treatment method for impurity removal treatment.
[0039] 2) In the pre-softening wastewater step, the high-hardness and high-salinity wastewater is transported to the rapid stirring tank through the wastewater delivery pipeline, and a set alternating electric field or alternating magnetic field is added to the wastewater delivery pipeline in the nanofiltration separation step to make the pre-s...
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