HBCR (high brine concentration and recovery) membrane treatment process

Abstract

The invention discloses an HBCR (high brine concentration and recovery) membrane treatment process, comprising: adjusting pH of pretreated high-concentration brine to 6-9, concentrating with an HBCR membrane, fully recovering or directly discharging produced fresh water having TDS (total dissolved solids) of <500 mg / L, and recycling produced draw solution; subjecting the HBCR membrane to independent use or combinatory use with a forward osmosis membrane, and washing the HBCR membrane for reuse. The TDS of the high-concentration wastewater may be increased up to 200000 mg / L, with TDS of the produced water being less than 500 mg / L. When the HBCR membrane is applied to the treatment of industrial high-concentration brine and high-polluted water, high recovery rate is exhibited; high-concentration brine can be treated with no need for massive complex pretreatment; simple washing can help remove the scale and restore the performance of the membrane, so that cost is reduced and operation expenditures are saved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to industrial water, domestic waste water and municipal waste water discharge treatment process, in particular to a HBCR high-salt concentrated membrane treatment process. Background technique [0002] At present, as the market demand for waste water reduction and zero discharge continues to increase, the demand for high-salinity waste water treatment is imminent. At present, when the high-salt wastewater is concentrated, especially when it is required to be concentrated to 14% to 20%, it is difficult to meet the requirements by using conventional membrane treatment processes, and the excessive energy consumption of the evaporation method results in high costs and excessive waste of resources; such as reverse osmosis concentrated brine, due to The salt content is particularly high, and most enterprises will choose to discharge the concentrated reverse osmosis water directly, c...

AI Technical Summary

Problems solved by technology

1. The water recovery rate is low when dealing with high-concentration brine; 2. High-pressure treatment operations require frequent chemical cleaning, which consumes a large amount of chemical cleaning agents and causes secondary pollution. TDS can be concentrated to 200,000mg / L in high-concentration brine, reducing thermal evaporation and crystallization water, saving costs and operating expenses

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