Synchronous calcium-magnesium-silicon removal pretreatment device of coal chemical industry wastewater and application method

Abstract

The invention discloses a synchronous calcium-magnesium-silicon removal pretreatment device of coal chemical industry wastewater and an application method. The device comprises a wastewater collection pool, a first-level reaction tank and an integrated clarifier, wherein the wastewater collection pool receives the coal chemical industry wastewater and is communicated with the first-level reaction tank through a pipeline; and after being treated in the first-level reaction tank, the coal chemical industry wastewater is input into a second-level reaction chamber in the integrated clarifier through a pump and a liquid medicine mixer for mixing reaction and settling separation. The synchronous calcium-magnesium-silicon removal pretreatment combined device of coal chemical industry wastewater is simple and stable in structure; and given the needs of vigorous development of the national coal chemical industry, the device disclosed by the invention has a broad market prospect, and good economic and social benefits are to be brought for sure.

Description

technical field [0001] The invention relates to industrial waste water treatment technology, and mainly relates to a pretreatment device and an application method for synchronously removing calcium, magnesium and silicon from coal gasification waste water, a special industrial waste water containing high silicon and high hardness pollutants. Background technique [0002] Coal gasification wastewater pretreatment is a necessary condition to ensure biochemical treatment and advanced treatment. In the pretreatment unit, pollutants such as oil, suspended solids, phenols, ammonia, hardness, and silicon are usually treated by gravity sedimentation, oil separation, air flotation, solvent extraction, steam stripping, filtration, lime, ionization, etc. Exchange method, magnesium agent, calcium agent and other treatment methods. However, there is no synchronous, efficient and mature method for coal gasification wastewater with high silicon and high hardness. Coal gasification wastew...

AI Technical Summary

Problems solved by technology

However, there is no synchronous, efficient and mature method for coal gasification wastewater with high silicon and high hardness.

Coal gasification wastewater with high silicon and high hardness will cause scaling and blockage of process equipment and pipelines, especially in advanced treatment, it will scale the reverse osmosis membrane in a short period of time, and it is difficult to clean the silicon scale after it is formed. The performance of the membrane is reduced or even fails, which seriously affects the recycling of coal gasification wastewater.

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