Industrial soft water
At present, our understanding of household water treatment has a wrong concept of consumption and awareness: as long as the "drinking" part meets the standard and other aspects of water use are not relevant. In fact, in addition to drinking, household drinking water includes food, bathing, laundry, and flushing. In fact, one-third of all kinds of substances in the water are absorbed into the human body through the skin through bathing. Good water can improve water washing power, reduce the amount of washing powder, reduce water pollution, etc. Good water can also reduce the foul smell of flushing and improve the indoor environment. Therefore, in addition to the "drinking" part, people's bathing, washing, washing and other water should be clean, hygienic and non-polluting. Brown et al studied the absorption of volatile organic compounds in water by the skin, according to the adult drinking water 2 liters / day, the baby drinking water 1 liter / day, both bath time is 15 minutes / day, the skin absorption of common volatile organic compounds in drinking water and The proportion of oral intake was 63/37 and 40/60 for adults and babies, respectively. Andelaman reports on indoor respiratory intake caused by trichloroethylene in drinking water. The amount of drinking water is 2 liters per person per day, and the water consumption for bathing is 40-95 liters per person per day. The respiratory intake of trichloroethylene in the shower is several times the oral intake of drinking water.
Therefore, the harmful effects of harmful substances in water on human health are not simply caused by drinking. According to foreign reports, the proportion of harmful substances in the water is roughly absorbed by the human body: 1/3 is taken from the mouth; 1/3 is absorbed by the skin during washing and bathing; and 1/3 is absorbed by the water vapor through the respiratory tract during bathing.
There are many places where water is used in industry, and different treatment methods are used to meet the required standards according to the quality of water used. The industrially common method of demineralized water is the ion exchange method.
Ion exchange water treatment
Ion-exchanged water treatment refers to the use of an ion exchanger to cause the exchanger to neutralize the exchangeable ions in the aqueous solution to produce a reversible exchange of substances in accordance with the amount of the substance, resulting in improved water quality and no substantial (chemical) structure of the exchanger. Changing water treatment methods. In this water treatment mode, only cations participate in the exchange reaction, called cation exchange water treatment; only anions participate in the exchange reaction, called anion exchange water treatment; both cations and anions participate in the exchange reaction, called cation, anion exchange Water treatment. Since the water quality of raw water varies widely, and the requirements for the quality of the effluent water are various, there are many types of ion exchange and a combination of water treatment methods, which use these water treatment methods to soften, remove alkali and remove salt. When the ion involved in the exchange reaction in the ion exchanger is sodium ion Na+, this method is called sodium (Na) type ion exchange method, and the exchanger is called sodium (Na) type cation exchanger, and similarly, there is hydrogen (H). ) ion exchange method and hydrogen (H) type cation exchanger.
The sodium type ion exchange method is the most common water treatment method for industrial boiler feed water. When the raw water passes through the sodium ion exchanger, the cations such as Ca2+ and Mg2+ in the water are exchanged with Na+ in the exchanger, which reduces the hardness of the water and softens the water. Therefore, this method is also called sodium ion exchange softening.
Vegetable Peeler Fruit Kitchen Knife
Vegetable And Fruit Peeler,Vegetable Paring Knife,Peeler Carrot Peelers
Shangqiu Zhengtu Hardware Technology Co,.Ltd , https://www.zlztlighter.com