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

Abstract

The invention discloses a process method for the application of ceramic particle filter material in the iron and steel industry wastewater treatment. In the filter tank of the iron and steel industry wastewater treatment device, the ceramic particle filter material is filled, and the ceramic particle filter material includes ceramsite filter material, porcelain sand The filter material and the ceramic ball filter material are filled in the filter tank in layers from top to bottom. The wastewater from the iron and steel industry enters from the upper end of the filter tank after the first sedimentation and the second advection sedimentation. Through the interception and adsorption of the ceramic particle filter material, the water Separation from suspended pollutants to discharge clear water. Using ceramic particle filter material instead of cobblestone, quartz sand and anthracite filter material in the past not only simplifies the process flow, reduces the cost of production, improves the processing efficiency, and improves the working environment; but also has a good filtration and purification effect, and the filtered water quality is clear without turbidity. Although the one-time filling cost is high, the service life of the filter material is increased by at least 6 times, the annual cost of the filter material is 40-50% lower than the annual cost of the traditional filter material, and the wastewater treatment and filtration interception capacity is increased by more than 30%. Zero discharge of waste water can be realized.

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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