Deep treatment method and system for solid-containing oil-containing low-concentration heavy metal wastewater

A low-concentration heavy metal, advanced treatment technology, applied in water/sewage multi-stage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc.

Inactive Publication Date: 2019-09-27
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0029] Aiming at the problem that the treatment of heavy metal pollutants in the existing production wastewater is difficult to meet the national, industrial and local heavy metal discharge standards, the present invention provid...

Method used

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  • Deep treatment method and system for solid-containing oil-containing low-concentration heavy metal wastewater
  • Deep treatment method and system for solid-containing oil-containing low-concentration heavy metal wastewater
  • Deep treatment method and system for solid-containing oil-containing low-concentration heavy metal wastewater

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Experimental program
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Effect test

Embodiment 1

[0068] 1. Material properties

[0069](1) Low-concentration heavy metal wastewater containing solids and oil: The cold coke wastewater discharged from an oil refinery has a solid particle content of 600 mg / L, an insoluble oil content of 179 mg / L, and heavy metal ions of chromium, tin, nickel, and copper of 0.92 mg / L, 1.6mg / L, 1.2mg / L, and 1.0mg / L, all exceeded the standard. The waste water treatment capacity of the side line experiment is 1m 3 / h, temperature 65°C.

[0070] (2) Separation and adsorption medium: The fluidized bed separator group uses modified carbon ball particles with a particle size of 0.5mm-1.0mm as the separation medium; the heavy metal ion adsorption tower uses self-made EMAH-1 adsorbent with a particle size of 0.3-1.2 mm.

[0071] 2. Process flow

[0072] In view of the characteristics of high solid content and oil content in wastewater, select as attached image 3 Process flow shown. The wastewater first passes through the fluidized bed separator to...

Embodiment 2

[0077] 1. Material properties

[0078] (1) Heavy metal wastewater with low concentration of solids: The content of suspended solids in the desulfurization effluent wastewater of a catalytic cracking unit in a chemical plant is 117mg / L, and the oil content is less than 5mg / L, including nickel (0.5mg / L), copper ( 0.79 mg / L), selenium (0.31mg / L) and three heavy metal ion concentrations exceeded the discharge limit value stipulated in the "Integrated Wastewater Discharge Standard" DB 31 / 199-2018. The waste water treatment capacity of the side line experiment is 1m 3 / h, the temperature is about 50°C.

[0079] (2) Separation medium and heavy metal ion adsorbent: the fluidized bed separator adopts modified quartz sand particles with a particle size of 0.5 mm to 1.0 mm; the heavy metal ion adsorption tower uses self-made R17E adsorbent with a particle size of 0.3 mm to 1.2 mm.

[0080] 2. Process flow

[0081] In view of the characteristics of low oil content and high solid conten...

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Abstract

The invention relates to the field of wastewater treatment in environment protection, in particular to a treatment method and system for solid-containing oil-containing low-concentration heavy metal wastewater. The method comprises the steps that firstly, a separator with a deep filtering boiling bed is used for removing soil particles in the wastewater; then, a fiber coalescence filter is used for controlling and removing soil in the wastewater and oil wrapped by a micro emulsion state; finally, a heavy metal ion adsorption tower is used for deeply removing an ion-state heavy metal pollutant in the wastewater, so that water discharging reaches the related emission standard. The whole treatment system only discharges the wastewater which reaches the standard, and no other waste liquid is discharged. According to the method, the heavy metal pollutant in the solid-containing oil-containing wastewater of the industries such as oil refining, power plants and electroplating can be deeply removed, and the water quality of the discharged wastewater reaches the related emission standard.

Description

technical field [0001] The invention belongs to the field of waste water treatment in environmental protection, and relates to a treatment system for waste water containing solids, oil, and low-concentration granular and ionic heavy metals, and is suitable for heavy metals, especially Class I heavy metals, in waste water from petroleum refining, power plants and other industries. Deep removal of objects. Specifically, a system for graded removal of low-concentration heavy metal pollutants in waste water containing solids and oil is provided. Background technique [0002] Heavy metal ions are one of the main pollutants in the water environment. The heavy metals referred to in environmental pollution mainly refer to Class I pollutants such as mercury, cadmium, lead, chromium, and metalloid arsenic with significant biological toxicity, and also include toxic heavy metals such as copper, zinc, cobalt, nickel, tin, and vanadium. thing. These heavy metals cannot be decomposed i...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F101/20C02F101/32C02F101/22
CPCC02F1/001C02F1/28C02F2101/20C02F2101/22C02F2101/32
Inventor 黄渊胡军吕文杰林海涛赵开庆汪华林刘洪来
Owner EAST CHINA UNIV OF SCI & TECH
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