-
PRODUCTS AND SERVICES
-
Tomorrow Environmental Protection
Comprehensive one-stop solution for companies in need
Application Cases
Contact Us
Address: North Industrial Park, Xianggong Street Office, Zhangqiu District, Jinan City, Shandong Province
Chemical softening
Chemical softening
The process of removing or reducing the calcium or magnesium salts in evaporated raw water is called hard water softening. Softening methods are mainly pharmaceutical softening method and ion exchange method.
Pharmaceutical softening method
① lime softening method will be lime and water into lime milk into the water can eliminate the temporary hardness of water, the reaction is
Ca(HCO3)2+Ca(OH)2→2CaCO3↓+2H2O
Mg(HCO3)2+2Ca(OH)2→Mg(OH)2↓+2CaCO3↓+2H2O
At the same time lime milk can make magnesium, iron plasma from the water precipitation out, prompting the cohesion of colloidal particles, but this method can not make the water completely softened, it is only suitable for high carbonate hardness and does not require a high degree of softening, but also as other methods of pretreatment stage.
② lime soda ash softening method that the mixture of lime milk and soda ash as a water softener. Soda ash can eliminate the permanent hardness of water, such as
CaCl2+Na2CO3→CaCO3↓+2NaCl
MgSO4+Na2CO3→MgCO3↓+Na2SO4
③ integrated softening method with lime milk and soda ash as the basic softening agent, with a small amount of trisodium phosphate as an auxiliary softening agent. Trisodium phosphate can cause temporary hardness and permanent hardness of salts to generate insoluble salts to make it precipitate.
Ion exchange method
The ion exchange method can be considered as a special kind of adsorption process. The sodium type cation exchanger can adsorb a variety of cations from the solution, while putting its own sodium ions into the solution, thus achieving the purpose of softening. There are many types of exchangers. Inorganic ion exchange agent exchange capacity is small, the industrial application of more sulfonated coal also tends to be eliminated, the current common use of organic polymers, also called ion exchange resin. Ion exchange resins are composed of organic polymers and cations or anions that can be exchanged, and are divided into cation exchange resins and anion exchange resins (see "ion exchange resins"). Cation exchange resins are divided into sodium (R-Na), hydrogen (R-H), ammonium (R-NH4), etc. depending on the exchange group they carry. The ion exchange is a reversible process, when the hard water flows through the sodium type exchange resin, Ca, Mg ions are exchanged according to the following formula:
2R-Na+Ca2+=CaR2+2Na
As the reaction proceeds, the exchange rate becomes slower and slower, and then the exchange stops. At this point, the exchange agent must be flushed with salt water, so that the reaction proceeds to the left and the exchange agent is regenerated. The actual application of the operation process: ① exchange water to be processed through the ion exchanger layer, exchange, until the exchanger failure; ② backwashing so that the water flow in the reverse direction through the failed ion exchanger, to remove the suspended matter and broken exchanger gathered during the exchange, and loosen the exchanger layer; ③ add regenerant to make the regeneration reaction, and the exchange down Ca, Mg plasma brought out, to restore the ability of the exchanger; ④ positive washing so that the water through the exchange of Ca, Mg plasma out, to restore the ability of the exchanger; ④ Positive washing Make the water flow through the exchanger layer and remove all the regenerant.
Chemical softening
Online Message
Other Applications
A national high-tech enterprise integrating scientific research, production and sales
Address：North of Niuyi Village, Xianggongzhuang Subdistrict,Zhangqiu District, Jinan City, Shandong Province, P. R. China
FOLLOW US
Shandong Mingtian Machinery
Tomorrow Environmental protection
Jitterbug
