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Method for flotation treatment of oily wastewater without medicament

A treatment method and wastewater technology, applied in flotation water/sewage treatment, separation method, grease/oily substance/floating matter removal device, etc., can solve problems such as inability to incinerate and reuse, secondary pollution of the environment, and land occupation

Inactive Publication Date: 2005-01-19
王克春 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Oily wastewater contains a certain amount of free oil and emulsified oil. The existing treatment method is to add chemicals (demulsifiers, flocculants) to make the oil stains form flocs and separate them from the water body. Occupation will occur during the treatment process. The oily waste residue with water of 1% of the wastewater volume is mainly composed of water, oil and drug-containing flocs. This oily waste residue cannot be incinerated and reused because it contains chemicals. It is mainly disposed of by stacking or burying, occupying land and affecting vegetation. , causing secondary pollution to the environment

Method used

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Embodiment Construction

[0004] Use a pump to pressurize the oily wastewater to 0.4Mpa. Before entering the mixing device, inject compressed gas (air, nitrogen, or petroleum gas). The air pressure is greater than the water pressure, and the gas volume is about 1% of the water volume. After the gas-liquid is fully mixed , to form a homogeneous solution in a state of saturated dissolved gas through a time-delayed pressure-holding tank. Then the flotation machine depressurizes and releases the slag and water to separate. The oil residue in the water body is wrapped by fine air bubbles and floats to the liquid surface. It is scraped off by the slag scraping device and collected in the slag collection tank. The treated water enters the subsequent treatment process. , The slag is transported to the recovery system or processed as fuel.

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Abstract

The invention discloses a method for flotation treatment of oily wastewater without medicament which comprises, pressurizing the oily wastewater to be treated, injecting compressed gas simultaneously, mixing gas-liquid sufficiently through a mixing machine, proceeding time-delay pressure maintaining, and entering floatation machine for pressure reduction release segregation.

Description

(1) Technical field [0001] The invention relates to a method for treating oily waste water by flotation without adding medicine in environmental protection engineering. (2) Background technology [0002] Oily wastewater contains a certain amount of free oil and emulsified oil. The existing treatment method is to add chemicals (demulsifiers, flocculants) to make the oil stains form flocs and separate them from the water body. Occupation will occur during the treatment process. The oily waste residue with water of 1% of the wastewater volume is mainly composed of water, oil and drug-containing flocs. This oily waste residue cannot be incinerated and reused because it contains chemicals. It is mainly disposed of by stacking or burying, occupying land and affecting vegetation. , causing secondary pollution to the environment. (3) Contents of the invention [0003] The object of the present invention is to provide a method for treating oily wastewater that can greatly reduce t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/24C02F1/40
Inventor 王克春王跃进袁赞根
Owner 王克春
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