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Wastewater treatment method and wastewater treatment system

A wastewater treatment system and technology for wastewater treatment, applied in multi-stage water treatment, water/sewage treatment, heating water/sewage treatment, etc., can solve the problems of inability to completely deal with heavy metal pollution, pollution still exists, etc., to reduce secondary pollution , Not easy to block the pipeline, the effect of high economic value

Pending Publication Date: 2020-04-10
无锡绿都环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The applicant aims at the above-mentioned disadvantages that the treatment method used in the existing production cannot completely deal with the heavy metal pollution, and the pollution still exists, and provides a wastewater treatment method and a wastewater treatment system. All substances are removed, and then high-purity and reusable heavy metal substances are extracted through evaporation and drying steps, which reduces production costs and the possibility of pollution, while avoiding evaporator tube blockage, low energy consumption, and mass production.

Method used

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  • Wastewater treatment method and wastewater treatment system
  • Wastewater treatment method and wastewater treatment system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057]1. When the treated wastewater is chromium-containing wastewater, the solid content in the filtrate after the RO membrane step is about 5%, and enters the first concentrated liquid relay tank 10, and 150 kg of the first concentrated liquid relay tank 10 The concentrated liquid enters the tank body 40 of the evaporator. At this time, the inside of the tank body 40 is not evacuated. The hot oil enters the heating jacket 41 from the heating medium inlet 37 and leaves from the heating medium outlet 35. The hot oil circulates to heat the tank body 40. When the thermometer at the thermometer port 30 detects that the temperature in the tank 40 is 60 degrees, stop heating, and the tank 40 starts to vacuumize, and the vacuum degree is -0.094 MPa until the water starts to boil, and about 65 kg of water evaporates after 2-3 minutes .

[0058] 2. Then add 50 kg of concentrated liquid from the first concentrated liquid relay tank 10. During the process of adding liquid, part of the v...

Embodiment 2

[0065] 1. When the waste water treated is nickel-containing waste water, the solid content in the filtrate after the RO membrane step is about 5%, and enters the first concentrated liquid relay tank 10, 150 kg of the first concentrated liquid relay tank 10 The concentrated liquid enters the tank body 40 of the evaporator. At this time, the inside of the tank body 40 is not evacuated. The hot oil enters the heating jacket 41 from the heating medium inlet 37 and leaves from the heating medium outlet 35. The hot oil circulates to heat the tank body 40. When the thermometer at the thermometer port 30 detects that the temperature in the tank 40 is 55 degrees, stop heating, and the tank 40 starts vacuuming, and the vacuum degree is -0.094 MPa until the water starts to boil, and about 70 kg of water evaporates after 6-7 minutes .

[0066] 2. Then add 50 kg of concentrated liquid from the first concentrated liquid relay tank 10, the heating jacket 41 heats the liquid to 58 degrees, th...

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Abstract

The invention discloses a wastewater treatment method and a wastewater treatment system. Chemical substances are not added by adopting a traditional chemical method to precipitate and separate out heavy metal substances under the condition that the heavy metal substances are dissolved in water and a physical treatment method is adopted in the whole process. The method comprises the following steps: completely removing water-insoluble substances in water; extracting the heavy metal substances through the steps of evaporation and drying, and the solid waste finally obtained through a drying powder system is a compound which is high in purity and contains chromium salt, nickel salt or other metal salt, and the substances can be directly recycled without landfill or discarding treatment and thus extra environmental pollution is not generated. The physical treatment mode is adopted without chemical treatment, the chemical treatment step is omitted, a large number of chemical reagents can besaved and the production cost is remarkably reduced; secondary pollution of the chemical reagents in the production process is reduced and the method is more environmentally friendly; and the heavy metals can be directly recycled so that the economic value is very high.

Description

technical field [0001] The invention relates to the field of wastewater treatment in the surface treatment industry, in particular to a wastewater treatment method and a wastewater treatment system. Background technique [0002] The surface treatment process refers to the process of decorating, protecting and obtaining certain new surface characteristics on metal or non-metal surfaces by chemical or electrochemical methods. The components of the discharged wastewater are complex, and the main pollutants are various heavy metals, acids and bases, surfactants, additives and organic pollutants. Among them, harmful heavy metals are the main pollutants, and some are Cu 2+ , Zn 2+ 、Cr 3+ 、Ni 2+ Exist in the form of cations, some in the form of CrO 4 2- 、Cr 2 o 7 2- 、Cu(CN) 4 3- , Cu(P 2 o 7 ) 2 6- It exists in the form of anions or complex ions. Heavy metals cannot be broken down, only transformed into their physical and chemical forms. If not handled properly, hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/20
CPCC02F9/00C02F1/001C02F1/444C02F1/441C02F1/04C02F1/046C02F2101/20C02F2301/08
Inventor 丁晓荣
Owner 无锡绿都环保科技有限公司
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