It adopts steam and carbon dioxide high-temperature activation, and adopts continuous mechanical operation in the whole process of production. The temperature measurement, display and alarm are performed in the key parts, and the automatic control production capacity is adjusted according to actual needs.
Technical features are:
The operation is convenient, the product yield is high, the quality is uniform and stable, and the production environment is good. Products are widely used in metallurgy, chemical, pharmaceutical, food, environmental protection and other fields. Acid, alkali, high temperature and high pressure, no chemical compounds and substitutes.
Technical indicators:
The products are inspected according to the national standard GB/T13803.1~13803.5-1999 of the People's Republic of China, and the quality reaches the standard of superior grade.
Selection of activated carbon in advanced treatment of building water supply
The activated carbons commonly used in the deep treatment of building water supply are shell carbon and coal charcoal. The raw materials for shell charcoal are apricot kernel, coconut shell, walnut shell, etc. The raw materials for coal charcoal are anthracite, bituminous coal and lignite. In recent years, coconut shell charcoal is considered to be the “best charcoal†due to its smallest pore radius, large specific surface area and high iodine value, and is widely used in the drinking water purification industry.
However, by analyzing the pore size distribution of the coconut shell char pores, we can know that the proportion of micropores in the pores of coconut shell charcoal is higher, while the proportion of macropores as diffusion channels and transition pores adsorbing macromolecular organic matter is lower. Therefore, its iodine value may be high and these adsorption capacities are not fully utilized in practical applications. Coconut shell charcoal has a limited source of raw materials and is almost the most expensive of all carbon types. In terms of performance and price ratio, coconut shell charcoal is not economical. The coal-based activated carbon has more transition pores and a larger average pore diameter, and can effectively adsorb and remove a large amount of organic matter in the water. When the raw water quality is not stable enough, and the composition of the organic matter in the water often changes, the adsorption efficiency can be better exerted. Coal charcoal has higher mechanical strength and lower price. Therefore, in the advanced treatment of building water supply, coal charcoal is a more economical carbon type. It should also be noted that coal charcoal is also used in the advanced treatment of building water supply, and anthracite should be selected as the raw material.
The second is to objectively look at the various technical indicators of activated carbon. For example, the iodine value is not the higher the better, the iodine value reflects the specific surface area of ​​the activated carbon, but since the water molecule diameter is only 0.532 nm, it can all enter the pores of the activated carbon, and the molecular diameter of the organic matter in the water is much larger than that of the water molecule. Can not fully enter all the pores of activated carbon. Therefore, although the iodine value reflects the adsorption capacity of activated carbon to a certain extent, when selecting activated carbon for deep treatment of building water supply, it is impossible to unilaterally pursue excessive iodine value. Since the iodine value is increased by one grade, the price of carbon will increase more. The adsorption effect is not necessarily improved or increased, which also reduces the performance price ratio. The evaluation indexes such as phenol adsorption value and methylene blue adsorption value can reflect the ability of activated carbon to remove organic matter in water relative to iodine value, but since phenol and methylene blue are still a single compound, organic molecules in water In comparison, their molecular diameters are still small, so they still cannot accurately indicate the ability of activated carbon to adsorb and remove organic matter in water.
Recently, some scholars are studying and exploring a new technical index to test the adsorption capacity of activated carbon by using a macromolecular substance instead of iodine or phenol. It is hoped that the ability of activated carbon to adsorb organic matter in water can be more accurately reflected than the commonly used indicators. . We should also pay attention to the decay curve of the adsorption performance of activated carbon. In the advanced treatment of building water supply, the adsorption performance of activated carbon is tested according to the pollution of raw water. When the attenuation is slow, that is, the attenuation curve is relatively gentle, the regeneration cycle of the activated carbon is long, which is economical and convenient to manage, and is gentle. The decay curve is even more important than the performance of new carbon.
Due to the wide variety of activated carbon products, the performance difference is large, and different types of activated carbon have different adsorption effects on different organic substances. When selecting activated carbon varieties, we should not only pay attention to the above technical indicators, but also pay attention to the analysis of microbial contamination components in raw water and master the changes with the seasons. The reliable method is to compare the adsorption performance of several carbon species with raw water, and select the carbon species with large adsorption capacity, stable and stable effluent quality, and long regeneration period, and take into account the economics on the basis of meeting the effluent quality.
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