Abstract: The vacuum filter is the equipment for solid-liquid separation of sulfur slurry in natural gas desulfurization system. After separation, sulfur paste and filtrate are obtained. The following defects have occurred in the process of on-site use: 1) during the production of sulfur paste, the water content ratio of the sulfur paste is high, which may cause pollution; 2) abnormal equipment vibration occurs during the operation of the vacuum filter. Aiming at the above problems, the optimization is carried out from such aspects as vacuum filter operating parameters, equipment performance and abnormal vibration of the equipment. The specific optimization involves: 1) controlling the feeding speed, driving wheel speed and other operating parameters during sulfur paste production; 2) controlling the structural parameters of the equipment, including limiting the flow of filtrate branch pipe elbow and reducing the diameter from 65mm to 25mm and replacing the filter cloth of pore diameter 30 μm with that of 12 μm; 3) adjusting the valve opening according to the on-site working conditions, and conducting regular maintenance to eliminate the abnormal vibration of the vacuum filter. Through taking the above control optimization measures, the rate of water content of sulfur paste produced by vacuum filter is reduced from more than 35% to less than 25%, and the equipment vibration value is reduced from more than 10 mm/s to less than 7.1mm/s. The problems of high water content ratio and large vibration of sulfur paste are solved.

Key words: vacuum filter, sulfur paste, water content ratio, vibration, environmental protection