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Heavy-metal-containing wastewater treatment and recovery method and device

A technology for heavy metals and waste water, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as high energy consumption, difficulty in long-term stable operation, and difficult treatment of low-concentration waste water

Inactive Publication Date: 2015-04-01
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

[0011] The technical problem to be solved by the present invention is: to overcome the existing problems of high energy consumption, difficult treatment of low-concentration wastewater, low treatment efficiency, and difficulty in long-term stable operation in the existing process, and to provide a method with good adaptability to operating conditions and simple process. Small footprint, heavy metal wastewater treatment process that can meet discharge standards stably for a long time

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  • Heavy-metal-containing wastewater treatment and recovery method and device

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Embodiment 1

[0055] Embodiment 1: Adsorption separation of wastewater containing heavy metals

[0056] 1. Material properties

[0057] (1) Wastewater containing heavy metals: The material is industrial wastewater containing heavy metals such as cadmium, nickel, zinc, and mercury produced in industrial production. It is 2t / h, and the temperature is 60-80°C, with an average of about 70°C.

[0058] (2) Adsorption particles (macroporous weakly basic anion resin, water content is 50-60%, mass total exchange capacity> 4.8mmol / g, wet apparent density is 0.65-0.75g / ml, wet true density is 1.02-1.08 g / ml): Add 300-400g of adsorption particles per cubic meter of heavy metal-containing wastewater.

[0059] 2. Process flow

[0060] Such as figure 1 shown.

[0061] When working, the adsorption particles and heavy metal-containing wastewater are fed into the mixing device through their respective feed pipes. After being stirred evenly in the mixing device, the mixed solution is pumped into the hy...

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Abstract

The invention relates to a heavy-metal-containing wastewater treatment and recovery method and device, and provides a heavy-metal-containing wastewater treatment and recovery method. The method comprises the following steps: (a) respectively sending adsorption granules and a heavy-metal-containing wastewater raw material into a mixing device, and mixing, wherein the mixing and adsorption are performed at the same time; (b) carrying out hydraulic cyclone on the heavy-metal-containing wastewater which is uniformly mixed with the adsorption granules to enhance the adsorption action of the adsorption granules, and pre-separating the adsorption granules and heavy-metal-containing wastewater; and (c) returning the pre-separated adsorption granules into the mixing device so as to be mixed with the heavy-metal-containing wastewater raw material, filtering the pre-separated heavy-metal-containing wastewater to further separate the adsorption granules in the heavy-metal-containing wastewater, returning the adsorption granules subjected to further separation into the mixing device so as to be mixed with the heavy-metal-containing wastewater raw material, meanwhile, discharging the filtered heavy-metal-containing wastewater, and sending to the subsequent technique for recovery. The invention also provides a heavy-metal-containing wastewater treatment and recovery device.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and relates to the treatment of sewage containing heavy metals. Specifically, the invention relates to a treatment and reuse method and device for waste water containing heavy metals. Background technique [0002] Heavy metal wastewater refers to wastewater containing heavy metals discharged from industrial production processes such as mining and metallurgy, machinery manufacturing, chemical industry, electronics, and instrumentation. Heavy metal (such as cadmium, nickel, mercury, zinc, etc.) wastewater is one of the most serious environmental pollution and one of the most harmful industrial wastewater to humans, and its water quality and quantity are related to the production process. [0003] Heavy metal pollution mainly has the following characteristics: [0004] (1) Although the concentration of heavy metals in natural water bodies is low, their toxicity persists for a long time. Ce...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F101/20
Inventor 白志山姚本飞赵双良宣晋杨晓勇
Owner EAST CHINA UNIV OF SCI & TECH
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