METHOD OF PIPELINE CHEMICAL DESCALING Russian patent published in 2009 - IPC F28G9/00 B08B3/08 

FIELD: heating, chemistry.

SUBSTANCE: method implies treating inner pipeline surfaces with chemical agents solution and its multiple circulation in the system. Mother solution of citric acid production composed of H₃Citr-78.9%, Na⁺+K⁺-0.38 gram equivalent per liter, Ca²⁺-0.036 gram equivalent per liter, Fe³⁺-0.0155 gram equivalent per liter, C^1-- 0.508 gram equivalent per liter, SO₄ ^2--0.011 gram equivalent per liter is used as the chemical agent; prior to the treatment the solution is diluted up citrate ions concentration of 4-8%, the process is carried out under the temperature of 80-90°C.

EFFECT: reducing descaling costs along with providing for the necessary efficiency.

3 cl, 1 ex, 1 tbl