The supply water of gas heated hot blast stove is very different from that of condensing hot blast stove. The supply water of gas heated hot blast stove can be as high as 100%, which is much higher than that of condensing hot blast stove. The recharge water treatment of gas hot blast stove should be carried out according to the steps of pretreatment, softening and desalination. Next, the hot blast stove manufacturers to introduce the gas hot blast stove supply water treatment effective measures. 1。预处理
The purpose of pretreatment is to remove suspended solids, gel content and organic matter in water. Adding aluminium sulfate to raw water can make the impurities coagulate into larger particles, borrow weight and sink, and then filter out. When groundwater or urban water is recharge water, raw water pretreatment can be filtered. Under the impact of impulse hydraulic mechanical stirring clarifier, siphon filter equipment and valveless filter, single-flow or double-flow mechanical filter together remove organic substances in water.
Calcium and magnesium salts form hard scales when natural or artificial ion exchangers are used in gas hot blast stoves. In order to prevent Ca-Mg hard scale from forming on the tube wall of hot blast stove. Calcium magnesium bicarbonate water with high alkalinity can also be treated by sodium hydrogen ion exchange method and pretreatment method. The treated water can also soften the water.
With the continuous improvement of hot blast stove parameters and the appearance of direct current hot blast stove, the desalination method must be adopted in the feed water salinity of hot blast stove. Chemical seawater desalination is a widely used technology. The most commonly used methods are cation exchange resin and anion exchange resin, and anion and Yang resin. In ion exchange, saline water is desalted by changing the salinity of resin, cation and anion. This is a relatively simple chemical desalting method.
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