Zero discharge treatment process of saline sewage produced by refining
A treatment process and zero-emission technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as reducing fresh steam consumption, and meet long-term operation and failure The effect of low efficiency and high energy efficiency
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[0019] In order to make the present invention more comprehensible, a preferred embodiment is described below in detail with the accompanying drawings.
[0020] The zero-discharge treatment process for refining and chemical salty wastewater provided by the present invention includes the following 3 steps:
[0021] Step 1: Combine figure 1 , The salty sewage from the flue gas desulfurization PTU (waste liquid treatment unit) part, the salt contained in it is sodium sulfite or ammonium sulfate, and the mass concentration is 7.5%-20%. It is filtered through a fiber filter to remove most of the solid particles. , And then pass through the secondary fine filter of the fine filter, the filtration accuracy is 1-15 microns, and the solid particles in the water after filtration are less than 2mg / L.
[0022] Step 2: Combine figure 2 , The salty sewage after the fine filtration passes through the plate heat exchanger 1 to exchange heat with the recovered condensed water, enters the degassing ta...
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