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Concentrated aqueous ammonia stripper

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    The invention particularly relates to a method for preparing a high-concentration ammonium carbonate solution from a low-concentration ammonia-containing aqueous solution. The method comprises the following steps: 1 regulating a pH value of the ammonia-containing aqueous solution which serves as a raw material to be The process conditions are controlled, so that the absorption rate of ammonium and CO2 in the ammonium carbonate production process can be improved, and moreover, the process is simple, the investment cost is low, a rectification or steam stripping process is not required, the energy consumption is low, and the requirement of CO2 content in the CO2 gas which serves as the raw material gas is relatively low. A process for preparing the ammoniacal ammonium carbonate aqueous solution, comprising the steps of: a adjusting an aqueous solution of ammonia as a raw material to the PH value The process for preparing the ammoniacal ammonium carbonate aqueous solution, characterized in that said according to claim 1, as a raw material gas and CO2 gas in step I obtained alternately into ammonia when absorbing liquid, into the pH of the absorption liquid is lowered to the CO2 gas from 9.
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    Off-Gas Treatment of Ammonia Using a Diffused Air Stripper: A Kinetic Study

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    Conference Proceedings | pawsandwhiskerspetspa.com

    Utilizing exhaust heat of the ammonia absorption refrigeration apparatus Technical Field. The present invention relates to an ammonia absorption refrigeration apparatus, and particularly relates to a exhaust heat of the ammonia absorption refrigeration apparatus. Background technique. Ammonia absorption refrigeration is a kind of heat-powered refrigeration mode, appears in the vapor compression refrigeration mode has been widely used before. Ammonia absorption refrigeration heat feature is directly driven, auxiliary power consuming only a small amount of cooling can be realized. Further, ammonia absorption refrigeration temperature range of refrigeration, air-conditioning can not only run condition, and can be applied in a variety of industrial refrigeration below zero Celsius in the cooling temperature.
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    Background: The presence of excess ammonia nitrogen in aqueous environments has caused various problems such as eutrophication, oxygen depletion and aquatic toxicity. Hence, it is necessary to have special consideration in the discharge of ammonia to environment. Objectives: The aim of this study was to study kinetic of ammonia degasification at a short-time 6 hours with relatively constant pH and temperature. Materials and Methods: Ammonia degassing was carried out using a diffused air stripper. The operating parameters such as ammonia, nitrate, nitrite, electrical conductivity EC , the oxidation-reduction potential ORP , and pH were analyzed according to standard methods.
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