Activated alumina catalyst household water fluoride removal method
Date: 2019-10-23 08:41:24Activated alumina catalyst has the function of selectively adsorbing gases, water vapor and some liquid water. After the adsorption is saturated, the water can be activated by heating at 175-315 ° C. After activation, the activated alumina can continue to adsorb, and the activated alumina can be activated several times. In addition to being used as a desiccant, it can also adsorb oil vapor from oils such as oxygen, hydrogen, carbon dioxide, natural gas, etc. It can also act as a catalyst and catalyst carrier. Activated alumina belongs to the category of chemical alumina, mainly used for adsorption, Purifier, catalyst and catalyst support. Raw materials and production processes are different depending on the product.
Emiconductor catalyst can be used as a high-fluorine (fluorine removal capacity) for defluorination of drinking water, a defluorination agent, a deacidification agent for transformer oil, and used as a regenerative oxygen industry, textile industry, electronics industry, and alkylbenzene to produce alkane gas drying. Cycle, automatic instrument air drying and fertilizer drying, petrochemical and other industries desiccant, cleaning agent (dew point up to -40 degrees), in the air separation industry dew point stability up to minus 55 degrees adsorption. It is a kind of trace moisture dry high efficiency desiccant. Ideal for non-thermal regeneration units.
The oxide deoxidizing catalyst is used together with the household fluorine removal cylinder. The built-in wha-104 is modified to reduce the fluoride by 1.6 kg. The water is from above and below. The fluorine removal cylinder is easy to operate and convenient to use. It is an ideal for removing fluoride from drinking water. device. In addition to the fluorine device or the industrial fluorine removal device, the fluorine removal agent is removed. (1) Configuration of aluminum sulfate solution (3 liters of water and 0.3 kg of solid aluminum sulphate), in a solution of net alumina defluoridation agent, soak for 5-10 hours (soaked with appropriate mixing) and then rinse 3-5 times , 2 liters of water each time.
(2) Regeneration household of defluorination agent: soak the aluminum sulfate solution and the activation solution with the solution of the regenerated alumina defluoridation agent for 30 hours, discard the soaking (soaked to the appropriate mixture) and then rinse it 3-5 times, each time about 2 liters of water. Or use PH method to regenerate pH, control at 7.5, (3) activated alumina defluoridation agent can be used continuously for 6 to 8 years, when the surface appears brown, the fluorine removal effect is significantly reduced, due to impurities caused by pollution, it is best Treatment with 3% dilute hydrochloric acid every six months, method of operation and regeneration method. This product is used in the production of alkylbenzene defluorination agents and fluoride removal drinking water.
Deoxidizing catalyst raw water defluoridation method should reduce the PH value before raw water contact filtration. The lower value should be lowered by adding acidic solution such as sulfuric acid, hydrochloric acid or acetic acid or adding carbon dioxide gas through raw material water. The dosage should be based on Raw water alkalinity and pH are calculated or determined by experiment. The filter's filtration rate can be used in the following two ways: when the influent pH is greater than 7, the intermittent operation mode, the 2 ~ filter design speed, 4 ~ 6 hours continuous operation interval 4 ~ 6X. When the influent pH is less than 7, the continuous operation mode can be used, and the filtration speed is 6 m / h. The flow rate of raw water through the filter layer can be used in the bottom-up method.
When the pH is a sulfuric acid solution, a top-down approach should be used. When the pH is regulated by carbon dioxide, a bottom-up approach should be used. The water content of a single filtration defluorination cycle may be slightly higher than 1 mg / liter, and should be adjusted according to the mixing capacity to determine the final fluorine content, but should not exceed 1 after the mixing of water and fluorine content. The cyclic adsorption capacity of the milligram/L filter material is mainly selected according to the raw water fluorine content, pH value, filtration speed, filtration thickness, fluorine content and material properties. When the sulfuric acid solution is used to adjust the pH to 6 ~ 6.5, generally 4 ~ / kg (F) 5g (Al2O3).