A modified ceramic composite coalescence material for oily wastewater deoiling

Abstract

The invention discloses an oily wastewater deoiling and modification ceramic composite coalescence material. The oily wastewater deoiling and modification ceramic composite coalescence material is composed of, by weight, 20 parts to 70 parts of activated aluminum oxide materials r-Al2O3, 20 parts to 70 parts of kaolin, 5 parts of feldspar, 10 parts to 20 parts of pseudo-boehmite, 5 parts to 30 parts of wood charcoal, and 0.1 part to 40 parts of oxidized polypropylene or polythene organic polymer materials. Prescription making, ball-milling and smashing, kneading, vacuum pugging, extrusion forming, drying and sintering are conducted to enable an aluminum oxide cellular material to be obtained, the sintering temperature is controlled between 480 DEG C and 1500 DEGC, a green body is sintered for 10 hours to 24 hours, and then the green body is covered with the oxidized organic polymer materials; the aluminum oxide cellular material is covered with the oxidized polypropylene or the oxidized polythene at the temperature ranging from 100 degrees to 680 degrees, and then the composite modification ceramic coalescence material formed by the oxidized organic polymer materials covered with the aluminum oxide cellular material is obtained. The oily wastewater deoiling and modification ceramic composite coalescence material has the advantages of being high in adsorbability, long in service life, capable of being resistant to acid and alkali, and good in deoiling effect.

Description

technical field [0001] The invention relates to a deoiling treatment process for oily waste water in coal coke chemical industry, petroleum refining industry, smelting industry, thermal power plant and ship mooring industry. The invention aims to provide a material for a high-efficiency deoiling filter element with high deoiling efficiency and long service life, which can remove micron-sized oil droplets in oily wastewater. Specifically, it refers to a modified ceramic composite coalescence material for deoiling oily wastewater. Background technique [0002] According to the principle, the existing wastewater deoiling technology is divided into gravity deoiling, air flotation deoiling, adsorption deoiling chemical reaction deoiling, and ultrafiltration filtration deoiling. Among them, adsorption deoiling is a commonly used technology in the prior art, which can Achieve the effect of oil removal rate greater than 90%. [0003] The adsorption materials used in the prior art f...

AI Technical Summary

Problems solved by technology

The filter and oil removal equipment assembled with this kind of material has the following disadvantages: first, it requires a large space and a large basic investment; second, the oil removal efficiency is not high. recycling

The deoiling material made of organic polymer materials has a good removal effect on light oil (gasoline, diesel) and free oil in oily wastewater, but for emulsified oil in oil-in-water and water-soaked water in oily wastewater, Especially for emulsified oil droplets with oil droplet particles smaller than 25 microns, there is no obvious removal effect

Moreover, the coalescing and deoiling materials made of plastic or organic polymer materials are not resistant to acid and alkali, especially when used in alkaline waste water, they are easy to age and lose the deoiling function. In the existing technology, organic polymer coalescing and deoiling materials are used in coal The service life of the chemical industry is generally only about 1 year

[0006] The actual situation of industrialization now is that there is a large amount of oily wastewater in coal coke chemical industry, petroleum refining industry, and thermal power plants, and these oily wastewater also contain a large amount of ammonia nitrogen or sulfide, heavy metals, asphalt and other colloids. The wastewater is either strongly alkaline or strongly acidic, which makes the organic coalescing material easy to age

Generally, the initial temperature of industrial wastewater is relatively high, and the use temperature of polypropylene materials is required to be less than 100°C, which means that organic polymer materials are either not resistant to high temperatures and the scope of use is limited, or they are easy to age and uneconomical for users. The scope of use is limited.