I. Introduction to Fully Automatic Power Plant Boiler Water Treatment Equipment

　　The fully automatic power plant boiler water treatment equipment is a relatively advanced device, which is a pure physical process preparation technology.

　　When the raw water containing hardness ions passes through the resin layer in the exchanger, the calcium and magnesium ions in the water are exchanged with the sodium ions adsorbed by the resin. The resin adsorbs the calcium and magnesium ions while the sodium ions enter the water. Thus, the water flowing out of the exchanger is softened water with the hardness removed.

　　Since the hardness of water is mainly formed by calcium and magnesium, cation exchange resins are generally used (Water softener), to remove from the waterCa2+,Mg2+The main components that form scale are displaced and carried out within the resinCa2+,Mg2+The increase, resin removalCa2+,Mg2+Its efficiency gradually decreases. When the resin has absorbed a certain amount of calcium and magnesium ions, it undergoes regeneration. The regeneration process involves flushing the resin layer with brine from the salt tank to displace the hardness ions on the resin and discharge them out of the tank with the regeneration waste liquid. Thus, the resin regains its softening exchange function.

　　That is, after water passes through the sodium ion exchanger, in the waterCa+,Mg+Be replacedNa+.

　　The general operation process of a control valve is as follows: operation, backwashing, salt suction, slow washing, salt tank water replenishment, and forward washing.

　　Ii.The working process of fully automatic power plant boiler water treatment

　　The process consists of five steps: working (sometimes called water production, the same below), backwashing, salt absorption (regeneration), slow rinsing (replacement), and fast rinsing. All the processes of different water softening equipment are very similar. However, due to the differences in actual processes or control requirements, there may be some additional procedures. Any water softening equipment based on sodium ion exchange is developed on the basis of these five processes (among which fully automatic water softening equipment will add a brine recharging process).

　　Schematic diagram of the working process of the fully automatic power plant boiler water treatment equipment

　　Backwashing: After the equipment has been in operation for a period of time, a lot of impurities brought by the raw water will be intercepted on the upper part of the resin. Only after removing these impurities can the ion exchange resin be exposed and the regeneration effect be guaranteed. The backwashing process involves water being drawn in from the bottom of the resin and flowing out from the top, which can wash away the dirt trapped at the top. This process usually requires5-15About a minute.

　　Salt absorption (regeneration) : This is the process of injecting brine into the resin tank. Traditional equipment uses a salt pump to inject brine, while fully automatic equipment uses a dedicated built-in injector to draw in brine (as long as there is a certain pressure in the incoming water). In the actual working process, the regeneration effect of salt water flowing slowly through the resin is better than that of simply soaking the resin in salt water. Therefore, water softening equipment all adopt the method of salt water flowing slowly through the resin for regeneration. This process generally requires30It takes about minutes, but the actual time is affected by the amount of salt used.

　　Slow rinsing (replacement) : After the salt water flows through the resin, the process of slowly rinsing all the salt in the resin with the original water at the same flow rate is called slow rinsing. Since a large number of calcium and magnesium ions on the functional groups are still exchanged with sodium ions during this rinsing process, based on practical experience, this process is the main process of regeneration, so many people call this process replacement. This process usually takes the same amount of time as salt absorption, that is30About a minute.

　　Quick rinse: To thoroughly wash away the remaining salt, the resin should be rinsed with raw water at a flow rate close to the actual working condition. The effluent from this process should be qualified soft water. Under normal circumstances, the rapid flushing process of the fully automatic power plant boiler water treatment equipment in Lanzhou is as follows5-15Minutes.