Technical method of applying filter material of ceramics granules to treating wastewater from iron and steel industry

Abstract

This invention discloses a method for utilizing granular ceramic filter materials in treating wastewater of iron and steel industry. The method comprises: filling granular ceramic filter materials into the filtration tank of treatment apparatus of wastewater of iron and steel industry, performing a first time sedimentation and a second time advection sedimentation on wastewater of iron and steel industry, sending into the filtration tank from the top, intercepting and adsorbing by the granular ceramic filter material, separating water and pollutants, and discharging clear water. The granular ceramic filter materials comprise haydite filter material, porcelain sand filter material, and ceramic ball filter material. The method utilizes granular ceramic filter materials to replace oval, quartz sand and anthracite filter materials, and thus has such advantages as simple process, low production cost, high treatment efficiency, good working environment, good filtration and purification effect, clear filtered water, long filter material usage cycle, low yearly filter material cost (saved by 40-50%), high filtration and sewage interception ability (raised by more than 30%), and zero wastewater discharge.

Description

technical field [0001] The invention relates to a process method for wastewater treatment, in particular to a process method for the application of ceramic particle filter materials in the treatment of wastewater in the iron and steel industry. Background technique [0002] Filtration and purification of wastewater treatment in the iron and steel industry is a very important link. Whether it is the cleaning and filtration of blast furnace gas wastewater, the wastewater purification of converter flue gas, or the treatment of iron-containing wastewater in steel rolling and continuous casting, the wastewater treatment, filtration and purification effect is good. Deterioration directly affects the economic and social benefits such as iron and steel smelting quality, smelting production cost, production efficiency and environmental pollution. So far, in the iron and steel industry wastewater treatment, it has been a traditional process to filter and purify wastewater by using peb...

AI Technical Summary

Problems solved by technology

So far, in the iron and steel industry wastewater treatment, it has been a traditional process to filter and purify wastewater by using pebbles, quartz sand and anthracite as filter media, and to use pebbles, quartz sand and anthracite as filter media for iron and steel industry wastewater treatment. , although the one-time filling cost of the filter medium is relatively small, and the production cost is relatively low, but the service life of the filter material is generally only 1-2 years, and the service life is short, which reduces the efficiency of wastewater treatment in the iron and steel industry. At the same time, pebbles, quartz Sand and anthracite are used as filter media for wastewater treatment. Due to the high temperature resistance, corrosion resistance and rapid cooling and rapid heat resistance of the cobblestone, quartz sand and anthracite filter media, chemical process treatment is required before filtration to separate out acid Alkaline impurities, the filter medium is easy to form lumps during filtration, blocking the filter channel, not only the processing process is complicated, but also the quality of the filtered water is turbid, the filtration and purification effect is low, the discharge of the filtered water is small, and the cut-off The pollution capacity is poor, the filtration and purification efficiency is low, the backwashing is difficult, the time is long, and the maintenance cost is high

At present, the problems existing in the traditional process of wastewater treatment in the iron and steel industry have been longed to be solved, but they have not been solved, thus affecting the rapid, healthy and coordinated development of the iron and steel industry.

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