Process for preparing high-performance complex crystal composite filter material for deep sewage purification

Abstract

The invention discloses a process for preparing a high-performance complex crystal composite filter material for deep sewage purification. The process comprises the following steps: uniformly mixing a ceramic filter material and calcium bicarbonate according to a weight ratio of 9 to 1, grinding the mixture in a flour mill, thereby obtaining ceramic composite powder with the particle size being 0.075-0.125mm; and weighing a proper amount of ceramic composite powder for later use according to a weight ratio of the blast furnace slagging amount to the ceramic composite powder being 3 to 1 before blast furnace slagging. The process has obvious energy conservation and consumption reduction capabilities and excellent effluent filtering effects and also has the advantages of high filtering precision, gas, water and electricity conservation, sand leakage avoidance during drainage, long backwash period, low filtering resistance, low effluent turbidity, high operating safety degree and convenience in maintenance and management, the surplus value of the blast furnace slag can be efficiently utilized, the conventional slag treatment process can be replaced in iron and steel enterprises, the additional value of the blast furnace slag is greatly increased, and considerable economic benefits are brought to the enterprises.

Description

technical field [0001] The invention relates to a preparation process of a filter material, in particular to a preparation process of a high-performance complex crystal composite filter material for deep purification of sewage. Background technique [0002] At present, sand medium filter material is one of the most widely used water treatment filter materials in the field of water treatment. However, due to its smooth surface and no micropores, the main mechanism of filtration is mechanical blocking, which is blocked by the gaps between sand particles and intercepts large particles. Sludge impurity particles have very limited ability to retain dirt, and many problems have been exposed during use, such as: low filtration accuracy of effluent, high filtration resistance, easy to block nozzles, and almost no effect on colloidal particles, resulting in sand media filter media The backwashing cycle is short, the backwashing water consumption is large, and the power consumption is...

AI Technical Summary

Problems solved by technology

[0002] At present, sand medium filter material is one of the most widely used water treatment filter materials in the field of water treatment. However, due to its smooth surface and no micropores, the main mechanism of filtration is mechanical blocking, which is blocked by the gaps between sand particles and intercepts large particles. Sludge impurity particles have very limited ability to retain dirt, and many problems have been exposed during use, such as: low filtration accuracy of effluent, high filtration resistance, easy to block nozzles, and almost no effect on colloidal particles, resulting in sand media filter media The backwashing cycle is short, the backwashing water consumption is large, and the power consumption is high, which is not conducive to energy saving and emission reduction of enterprises. In addition, the sand media filter material is easy to run out, easy to harden, and the filtered water volume will be greatly reduced after backwashing, etc. problems, so its service life is short, and the filler needs to be replenished frequently

Compared with the sand medium filter material, the ceramic filter material has the advantages of hardness, more pores, and high activity, but its price is very expensive, and it is difficult to be used in production practice.

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