Zero-liquid discharge (ZLD) wastewater treatment apparatus and method
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United States of America Patent
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Oct 17, 2023
Grant Date -
Oct 28, 2021
app pub date -
Apr 28, 2021
filing date -
Apr 28, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A zero-liquid discharge (ZLD) wastewater treatment apparatus is provided. The ZLD wastewater treatment apparatus includes a concentrator configured to concentrate wastewater to produce a primary concentrate, an evaporation crystallizer configured to concentrate and crystallize the primary concentrate to produce a secondary concentrate, a cooling crystallizer configured to cool the secondary concentrate to generate crystals from the secondary concentrate, a dehydrator configured to separate the product produced by the cooling crystallizer into a solid component and a liquid component, and a cooling system configured to cool the secondary concentrate introduced into the cooling crystallizer, wherein the liquid component produced by the dehydrator heat exchanges with a cooling medium in the cooling system and returns to the evaporation crystallizer.
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