A vacuum belt filter washing method

Abstract

The invention discloses a vacuum belt filter rinsing method, which belongs to the field of wet desulfurization production, and is characterized in that it comprises the following steps: a. Install a spray device on the vacuum belt filter, and install two rows of wide-angle fans of the spray device The spray nozzles are staggered above the filter cake; b. Adjust the nozzle angle of the wide-angle fan-shaped spray nozzle to 60-120°, set the pressure drop to 0.2-0.4Mpa, and the spray volume of a single wide-angle fan-shaped spray nozzle is 0.02-0.08m 3 / h, the ratio of the amount of flushing water to the amount of sulfur is 3:5; c, open the primary sprayer of the spraying device, and carry out primary spray cleaning to the filter cake; then open the secondary sprayer, and perform secondary spray cleaning on the filter cake Level spray cleaning; finally turn on the three-level sprinkler to perform three-level spray cleaning on the filter cake. The invention can ensure the vacuum degree of the filter cloth, reduce the water content of the sulfur paste, and achieve a balance between the washing effect and the water consumption, so as to realize good energy saving and environmental protection effects.

Description

technical field [0001] The invention relates to the technical field of wet desulfurization production, in particular to a vacuum belt filter washing method. Background technique [0002] The vacuum belt filter is a high-efficiency equipment that uses filter cloth as the filter medium and makes full use of the gravity of the material and vacuum suction to achieve solid-liquid separation. advanced features. Moreover, the operation is simple and the degree of automation is high, so it is widely used in metallurgy, mining, papermaking, food, pharmaceutical and other industrial fields. [0003] The vacuum belt filter uses an integral annular rubber belt as a vacuum chamber. The endless rubber belt is driven by the motor to run continuously, and the filter cloth is laid on the belt to run synchronously with it, and the belt is in contact with the annular friction belt on the vacuum slide table to form a water seal. The slurry is evenly distributed on the filter cloth by the dis...

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Problems solved by technology

[0009] The vacuum belt filter rinsing device disclosed in this patent document, although the impurities in the leaching solution are not easy to accumulate in the rinsing hopper, which makes the rinsing hopper easy to clean, but there are also large droplets of washing liquid and a small distribution angle, which makes the leaching The problem of small washing coverage area requires multiple washings to clean the filter cake, and the length of the filter cloth is long; the eluent is easy to break through the sulfur paste filter cake, resulting in a decrease in the vacuum degree of the filter cloth, and the high water content of the sulfur paste. It does not meet the requirements of filtering sulfur in complexed iron wet desulfurization process

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