Boiler Chemical Cleaning Procedures - LinkedIn
Jul 24, 2017 · A typical chemical cleaning procedure involves the use of strong cleaners such as inhibited hydrochloric acid. The mineral acid dissolves inorganic scales and corrosion by-products. The acid cleaner is then drained, the boiler flushed with water, and
Oct 23, 2017 · After preliminary cleaning the boiler should be filled and the unit heated sufficient to have the metal temperature around 65ºC. The boiler is then drained and the hot dilute inhibited acid (not
May 02, 2000 · Demineralizers are regenerated with sulfuric or hydrochloric acid for cation beds, and sodium hydroxide for anion beds. Reverse osmosis is yet another method for reducing dissolved solids from water supplies. It too reduces both positively and negatively charged ions but in a different way.
As with a sodium zeolite unit, an excess of regenerant (sulfuric or hydrochloric acid) is required up to three times the theoretical dose. To complete the demineralization process, water from the cation unit is passed through a strong base anion exchange resin in the hydroxide form.
Boiler Chemical Cleaning: Doing It Correctly
There are two basic methods of acid or chelant cleaning: the circulation method and the static (sometimes called fill-and-soak) method. In the circulation method, the cleaning solution is intermittently circulated through the unit until the chemical content and the iron and copper content of the cleaning solution reach a constant value, indicating the end of the reaction between the solvent and deposits.
Adding an economizer to an existing high pressure boiler installation would increase the capacity of the plant. Boilers that exceed 100 boiler horsepower, operating at pressures exceeding 75 psig or above and those that are significantly loaded all year long are excellent candidates for economizer retrofit.
BOILER WATER TREATMENT HANDBOOK Chemical Publishing - Aca