How to maintain plate heat exchangers for central heating systems

  The central heating heat exchanger is mainly to ensure water quality and add scale and corrosion inhibitors, to properly and safely clean heat How to maintain plate heat exchangers for central heating systemsexchange equipment, and to strengthen daily water treatment management, which can certainly alleviate the scaling and corrosion problems of heating heat exchanger plates.This can extend the service life of the heat exchange equipment and achieve good social and economic benefits.

(1) There are two main ways to prevent scale formation and corrosion. One is to use demineralized water as supplemental water to reduce calcium, magnesium, and chloride ions in the water, but this requires higher operating costs and requires strict monitoring of the system's circulating water hardness, pH, alkalinity, chloride, and suspended matter. The common method is to directly use tap water as supplemental water, and add scale inhibitors and corrosion inhibitors in the system to prevent the formation of calcium and magnesium scales and under-scale corrosion.

(2) Exclude or reduce impurities such as solid suspended solids in circulating water

In the dynamic circulating water, suspended solids include mud, sand, residue, powder particles, biological slime, equipment corrosion products iron oxide, copper oxide. Add filters on the makeup water and return water lines and clean them frequently to remove some large particles of suspended impurities.

(3) Adjust the appropriate flow rate.

Ensure that the flow velocity distribution in the heat exchanger is uniform to avoid large speed gradients and ensure uniform temperature distribution. Under the premise of ensuring a reasonable pressure drop and not causing corrosion, increasing the flow rate helps reduce dirt and prevent corrosion under scale.