The effect of temperature on the crystalline structure and morphology of calcium carbonate fouling was investigated by X-ray diffraction analysis and SEM observation.The experimental results indicated that temperature not only affected the crystalline type of fouling

but also affected the lattice parameter and particle size of the precipitated phase.Calcite was the main precipitated phase at a lower temperature

and the amount of aragonite would increase with increasing temperature.The disturbance induced by low temperature boiling could reduce the size of aggregating fouling particle.