PROCESS AND SYSTEM FOR THE REMOVAL OF SCALE BUILD-UP

摘要

A method to remove scale build-up in a vessel having at least one screen is described and involves placing a cover inside the vessel such that it is located beneath at least one screen to separate the screen from the rest of the vessel. The cover in the vessel forms an upper portion and a lower porti on in the vessel. Preferably, the cover is in close proximity to the screen whi ch is located in the upper portion of the vessel. The method then further includes introducing a chemical formulation into the upper portion of the vessel in a sufficient amount to remove at least a portion of the scale buil d- up on the screen. A system to remove scale build-up is also described and includes a vessel having at least one screen. The system further includes a cover located inside the vessel and beneath at least one screen to separate the screen from the rest of the vessel and to form an upper portion and a lower portion in the vessel. Normally the cover is in close proximity to the screen. The system further includes a chemical formulation present in the upper portion of the screen to remove scale build-up. The system of the present invention provide an economical and chemical means to remove scale build-up in vessels that are especially large, such as those used in the pap er and pulp manufacturing industry. The present invention further reduces the time needed to remove scale build-up in vessels have one or more screens.