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Industrial treatment method for oil containing heavy metal wastewater

A treatment method and wastewater treatment technology, applied in water/sewage treatment, neutralized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve problems such as hindering the removal of heavy metals and reducing the treatment effect of heavy metal ions, so as to avoid energy Effects of consumption, waste reduction, and floor space reduction

Inactive Publication Date: 2018-12-18
SHANGHAI HEYUAN ENVIRONMENTAL PROTECTION GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] But now heavy metal ions often exist in oily wastewater, because the presence of oil in the water seriously hinders the removal of heavy metals, reducing the treatment effect of heavy metal ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] As a preferred embodiment of the present invention, the No. 1 sump, the No. 2 sump, and the inspection pool are arranged sequentially from high to bottom, and a filter channel is connected between the No. 1 sump and the No. 2 sump, and the No. 2 sump There are many pipes connected to the test pool, and a large water pump is installed between the No. 1 sump and the test pool to transport the waste water in the test pool to the No. 1 sump.

[0032] In this embodiment, the No. 1 sump, the No. 2 sump, and the inspection pool are arranged sequentially from the height to the bottom. The vertical space setting can reduce the floor area of ​​the wastewater treatment equipment. The water outlet of the No. 1 sump and the water inlet of the No. 2 sump need to be opened. Under the action of gravity, the wastewater flows from the No. 1 sump through the filter channel and flows into the No. 2 sump, avoiding the use of water pumps for transportation The energy consumption generated is...

Embodiment 2

[0034] As a preferred embodiment of the present invention, the alkaline substance in step 2 and step 4 is trisodium phosphate with a concentration of 20-30 mg / L, and the demulsifier in said step 2 is a mixture of propylene glycol and propylene oxide, And the mass ratio of propylene glycol and propylene oxide is 2:1, and the coagulant is basic aluminum chloride with a concentration of 50-80mg / L.

[0035] In the present embodiment, the selection of alkaline substances through repeated tests is the best trisodium phosphate of 20-30mg / L, and the demulsifier is a mixture of propylene glycol and propylene oxide, and the mass ratio of propylene glycol and propylene oxide is 2: 1 is the best, and the choice of coagulant is basic aluminum chloride with a concentration of 50-80mg / L. The cost is low and the effect is not bad, which is conducive to saving treatment costs.

Embodiment 3

[0037] As a preferred embodiment of the present invention, the filter channel has an S-shaped structure, and fiber filter nets are uniformly arranged inside the filter channel.

[0038] The filter channel in this embodiment has an S-shaped structure, so that when the waste water flows through the filter channel, the distance is longer and the filtering effect is better. At the same time, the filter channel is evenly equipped with a fiber filter to prevent the precipitated grease from flowing into the No. 2 sump again. In this process, it affects the subsequent treatment of heavy metal ions.

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Abstract

The invention discloses an industrial treatment method for oil containing heavy metal wastewater. The industrial treatment method comprises the steps: firstly, removing grease in wastewater; then utilizing a chemical method to remove heavy metal ions in the wastewater; then utilizing a checking pool to check whether the treated wastewater can meet a standard; then discharging the treated wastewater. According to the industrial treatment method disclosed by the invention, small oil drops in the wastewater are agglomerated to increase the diameters of particles or damage particle stability; thus, the grease in the wastewater is removed, the optimal reagent concentration and the reagent use amount are chosen through multiple experiments, resource waste is reduced, and a fluidized bed and a sodium carbonate reagent are utilized to remove the heavy metal ions in the industrial wastewater after the grease is removed; compared with a traditional technology, a treating process is simpler; meanwhile, sludge dewatering equipment is also saved; furthermore, a first water collecting tank, a second water collecting tank and a checking tank are arranged in a perpendicular space, and the floor space of treating equipment is reduced; meanwhile, water flow can sequentially flow into the next technology by relying on the gravity action, and energy consumption caused by needing mechanical equipment transportation is avoided.

Description

technical field [0001] The invention relates to the technical field of oily heavy metal wastewater treatment, in particular to an industrial treatment method for oily heavy metal wastewater. Background technique [0002] Heavy metal pollution refers to environmental pollution and ecological damage caused by heavy metals and their compounds, and the degree of harm depends on the concentration and chemical form of heavy metals in the environment, food and organisms. Heavy metal pollution is mainly manifested in water pollution, and partly in the atmosphere and solid waste. Heavy metal pollution is different from the pollution of other organic compounds. Many organic compounds can be purified through the physical, chemical or biological effects of nature itself, so that the hazards can be reduced or eliminated; while heavy metals are enriched and difficult to degrade in the environment. [0003] From the perspective of environmental pollution, the most representative heavy met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20C02F101/32
CPCC02F1/001C02F1/40C02F1/44C02F1/5236C02F1/66C02F9/00C02F2101/20C02F2101/32
Inventor 李诗恬
Owner SHANGHAI HEYUAN ENVIRONMENTAL PROTECTION GRP
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