Method and apparatus for processing fluid-bed of oily wastewater

A treatment method and fluidized bed technology are applied to the separation of oily pollutants and water bodies, and the regeneration of oil-absorbing resins under the fluidized bed process. , In the field of high oil-absorbing resin, it can solve the problems of increased fluidized bed resistance, slow processing speed, and increased pressure drop, and achieve the effects of increasing contact time, avoiding resin extrusion, and avoiding increased resistance

Inactive Publication Date: 2008-07-16
SUZHOU TIMELYBLUE ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method disclosed in this patent has the following disadvantages: First, because the oil-water mixture passes through the fluidized bed from top to bottom, the volume expansion of the oil-absorbing material particles after absorbing oil causes the bed resistance of the fluidized bed to increase, and the oily wastewater When flowing through the bed, the pressure drop increases and the processing speed is slow; secondly, the oil-absorbing material in this invention needs ethanol or alcohol-based substances to be activated
Chinese patent CN1231991 provides a method of reusing the oil-absorbing resin through distillation to recycle the oil-absorbing resin. This method is mainly used for loose oil-absorbing resin, and it is not applicable to the oil-absorbing resin filled in oil-absorbing equipment.
However, this method needs to fully soak the desorbent and oil-absorbing resin for 2 to 3 hours.

Method used

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  • Method and apparatus for processing fluid-bed of oily wastewater
  • Method and apparatus for processing fluid-bed of oily wastewater

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Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: Referring to the accompanying drawing 1, a fluidized bed equipment for treating oily wastewater includes a fluidized bed body 1, an upper head 2 and a lower head respectively connected to the upper and lower ends of the bed body Head 3, the lower head 3 is connected with the lower end of the fluidized bed body through an unloadable flange 4, the upper head 2 is provided with an extractant inlet 5, and the lower head 3 is provided with a waste water inlet 6, the The waste water inlet 6 can be used as the extractant outlet, and a clear water outlet 7 is provided on the upper end wall of the fluidized bed. An oil-absorbing resin bed is provided above the bed 8 with an oil-absorbing resin screen 9 , and an internal stirring device 10 is provided in the bed 8 .

[0025] Embodiments 2 to 5 further describe the oil absorption process involved in the present invention.

Embodiment 2

[0026] Embodiment two: referring to accompanying drawing 1, shown in accompanying drawing 2, use the fluidized bed equipment shown in accompanying drawing 1, with oily waste water (containing 10% (volume content) dimethylbenzene) from the oily waste water of the lower end of fluidized bed Inlet 6 passes through the fluidized bed loaded with high oil-absorbing resin material, the flow rate of oily waste water is 20 liters / hour, the stirring device 10 is not working, the clear water can enter other processes or be directly discharged, and the xylene content in the clear water is 3%.

Embodiment 3

[0027] Embodiment three: use the fluidized bed equipment shown in accompanying drawing 1, with oily waste water (containing 10% (volume content) xylene) from the oily waste water inlet 6 of the lower end of fluidized bed through the flow that is loaded with super oil-absorbing resin material The fluidized bed, the flow rate of oily waste water is 20 liters / hour, the stirring device 10 works, the clear water can enter other processes or be directly discharged, and the xylene content in the clear water is less than 1%.

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Abstract

The invention discloses a process for treating oily wastewater by using a fluidized bed and a device thereof, which comprises the steps: the oily wastewater enters from a lower end of the fluidized bed to pass through the fluidized bed which carries a high oil-absorption resin bed layer from downward to upward and the high oil-absorption resin absorbs oily constituent; in the post-treatment process of the oil-absorption resin, extractants enter from an upper end of the fluidized bed to pass through the oil-absorption material bed layer from upward to downward; the oily pollutant absorbed by the oil-absorption material is extracted to be discharged from an outlet of the lower end of the fluidized bed; the fluidized bed device is a conical structure which is big at the upper part and small at the lower part and is provided with a stirring device; an inlet of the oily wastewater is arranged on the lower head of the fluidized bed. The invention prevents from occurrence that resistance of the bed layer is increased which is caused by expansion of the resin after oil absorption and pressure drop is increased when the oily wastewater flows through the bed layer. The invention has high oil-absorption efficiency and the oil-absorption resin can be repeatedly used.

Description

technical field [0001] The present invention relates to a method for treating oily wastewater, in particular to a method for absorbing oily pollutants contained in wastewater by using a highly efficient and recyclable high oil-absorbing resin, and using a fluidized bed process to separate the oily pollutants from water; The invention also relates to the regeneration of the oil-absorbing resin under the fluidized bed process. Background technique [0002] With the development of my country's chemical industry, the environmental pollution caused by oily sewage, waste liquid and industrial accidents such as the leakage of oil tankers is becoming more and more serious. In organic wastewater, benzene, toluene and halogenated hydrocarbons cause great harm to the environment, while These substances are difficult to degrade, and often exist in the form of fine droplets or liquid films in water bodies, which are difficult to deal with by conventional physical and biological methods. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40
Inventor 路建美夏雪伟
Owner SUZHOU TIMELYBLUE ENVIRONMENTAL TECH
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