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A kind of advanced treatment method of oily graphite wastewater

A technology for advanced treatment and waste water, applied in the field of water treatment, can solve problems such as environmental pollution and waste of resources, achieve good adsorption effect, reduce treatment cost and good treatment effect

Active Publication Date: 2020-11-20
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If it is not utilized and left to pile up, it will not only cause serious pollution to the environment, but also cause a great waste of resources.

Method used

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  • A kind of advanced treatment method of oily graphite wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of processing method of oily graphite waste water is as follows:

[0022] Inject the oil-containing graphite wastewater with a total suspended matter of 498 mg / L (400-500 mg / L) and an oil content of 172 mg / L (100-300 mg / L) into the air flotation tank 1, aerate for 1 hour, and scrape the oil through the oil scraping device 2 Impurities such as oil and suspended solids floating on the water surface are scraped off into the oil collection tank, and the effluent is sent to the bottom inlet of the adsorption tower 4 through the lift pump 3, and flows out from the top of the adsorption tower from bottom to top. The adsorption time is 0.5h, and the adsorbent is 75g. The modified steel slag to be filled is a mixture of steel slag and coke powder at a ratio of 1:1, roasted in a muffle furnace at 300°C for 1 hour, and passed through a 40-mesh sieve. The outlet water passes through the flow pump 5 to 5m 3 The flow rate of / h enters the EDI membrane stack reactor 6, and the...

Embodiment 2

[0024] A kind of processing method of oily graphite waste water is as follows:

[0025] Inject oily graphite waste water with a total suspended solids of 498mg / L (400-500mg / L) and an oil content of 172mg / L (100-300mg / L) into the air flotation tank 1, aerate for 2 hours, and scrape the oil through the oil scraping device 2 Impurities such as oil and suspended solids floating on the water surface are scraped off into the oil collection tank, and the effluent is sent to the bottom inlet of the adsorption tower 4 through the lift pump 3, and flows out from the top of the adsorption tower from bottom to top. The adsorption time is 1h, and the adsorbent is 85g. The modified steel slag is a mixture of steel slag and coke powder at a ratio of 4:1, roasted in a muffle furnace at 400°C for 1 hour, and then passed through a 30-mesh sieve. The outlet water passes through the flow pump 5 to 4m 3 The flow rate of / h enters the EDI membrane stack reactor 6, and the EDI membrane stack is fil...

Embodiment 3

[0027] A kind of processing method of oily graphite waste water is as follows:

[0028] Inject the oil-containing graphite wastewater with a total suspended matter of 498mg / L (400-500mg / L) and an oil content of 172mg / L (100-300mg / L) into the air flotation tank 1, aerate for 1.5h, and pass through the oil scraping device 2 Scrape off impurities such as oil and suspended solids floating on the water surface into the oil collection tank, and the effluent is sent to the bottom inlet of the adsorption tower 4 through the lift pump 3, and flows out from the top of the adsorption tower from bottom to top. The adsorption time is 0.8h, and the adsorbent is 80g , the filled modified steel slag is a mixture of steel slag and coke powder at a ratio of 2:1, roasted in a muffle furnace at 450°C for 1 hour, and then passed through a 50-mesh sieve. The outlet water passes through the flow pump 5 to 5m 3 The flow rate of / h enters the EDI membrane stack reactor 6, and the EDI membrane stack i...

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PUM

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Abstract

The invention discloses an air flotation+ steel slag adsorption+ membrane separation combination process for treating oil-containing graphite wastewater. The content of oil and the content of suspended solids in the treated wastewater are both lower than 1 mg / L, and meet the discharging requirements of the suspended solids and the oil in GB13456-2014 Iron and Steel Industry Water Pollutant Discharging Standard. Moreover, steel slag is taken as an adsorbent, so that double purposes of treating waste by waste and saving treatment cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to an advanced treatment method for oily graphite wastewater. Background technique [0002] The rolling system of iron and steel enterprises is an important source of oily wastewater. Non-polar organic matter - oil and polar inorganic matter - water are two substances with different properties. Therefore, the state of oil in water can be divided into three types: oil slick, emulsion and sludge. The oil slick covers the water surface, which isolates the reoxygenation of the surface of the water body, degrades the biodegradable organic matter in the water body, loses the self-purification ability of the water body, and the reduction of dissolved oxygen in the water body destroys the ecological balance in the water, while the oxygen consumption of oil The effect will increase the organic load of the water body and accelerate the deterioration of the water body. The existence ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F103/16
CPCC02F1/24C02F1/281C02F1/42C02F9/00C02F2001/425C02F2103/16
Inventor 刘芳胡绍伟陈鹏王飞王永杨大正
Owner ANGANG STEEL CO LTD