Active carbon activating treatment for zeolite and its preparation application and regeneration

Abstract

A process for activating and regenerating zeolite includes such steps as choosing the grayish-green clinoptilolite particles, calcining in the oxygen filled non-metal furnace, air-floating in the low-concentration acid solution, high-temp steaming by alkali solution, washing, immersing in the solution aluminium salt and alum, cyclic boiling for regenerating, high-temp steam washing, immersing in the solution of stabilizer for raising pH value, fast drying and sealing in plastic bags.

Description

Technical field [0001] The invention relates to the field of water quality transformation of drinking water. Background technique [0002] Zeolite was first discovered by Swedish mining experts as early as 1756. Since the discovery of large-scale sedimentary zeolite deposits in the 1950s, zeolite has been turned into a very promising mineral in industry and agriculture with in-depth research on its use. Raw materials, China only began to discover zeolite mines in 1972, and only passed the national bureau-level scientific and technological appraisal in 1986 and was limited to feed and cement additives. Until 1992, we worked with Professor Li Guirong from the Department of Environmental Sanitation of Lanzhou Railway University to develop zeolite activation treatment for water content. Fluorine, iron, manganese and other metals are used by the Huashan Environmental Protection Equipment Factory of the First Engineering Bureau of the Ministry of Railways to remove fluoride in some sta...

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Problems solved by technology

From August to December 2000 in Beijing, I taught the zeolite activation technology (the technology was not perfect at that time and needed further improvement) to Sun Haoming and others in Beijing. It should be said that Sun Haoming obtained it. The patented technology taught by us was still available until the end of 2000. It is the best way to remove fluoride, which overcomes the shortcomings of the other five kinds of fluoride removal, but we have not applied for a patent for a long time because this method of zeolite modification is not perfect enough, and there are certain shortcomings, such as calcination anoxic calcination, Zeolite ironization, etc. must be soaked in acid solution for cleaning. Some ferromagnetization cannot be completely removed. The common equipment for boiling alkali solution is a large iron pot, and it is difficult to leave the ferromagnetization. The regeneration of aluminum salt alum adopts the soaking method. It can’t be thorough, so the defluoridation effect is still not very high. The maximum defluoridation per kilogram of modified zeolite is about 500 mg. At the same time, the range of 1%-10% acid-base soaking solution is too large, and the concentration of 1% can’t work at all. 10% concentration and more than 8% will cause serious corrosion to the equipment, and the corrosion will have a direct impact on the soaked zeolite, so it is impractical

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