Pressure relief device for sulfur-dissolving filter

Abstract

The invention discloses a pressure relief device for a sulfur-dissolving filter. The device comprises a crude sulfur tank and a filter, wherein the filter is provided with an inlet and an outlet, theinlet of the filter is connected to the crude sulfur tank through a sulfur inflow passage, the sulfur inflow passage is provided with a crude sulfur pump for providing power for sulfur to enter the filter, the outlet of the filter is connected with a settling tank through a sulfur outflow pipeline, an air pipeline is further arranged, one end of the air pipeline is connected with an air compressor, the other end is connected with the filter, a position connected with the filter is provided with an overflow branch, and the overflow branch is provided with an overflow valve; the air pipeline issuccessively provided with a compressed air main valve, a compressed air release valve and a compressed air valve from the air compressor to the overflow branch, a reflux pipeline is further arrangedat the outlet of the filter in a connected mode, and the other end of the reflux pipeline is communicated with a reflux port arranged in the crude sulfur tank. The pressure relief device is conduciveto the long-term operation of the crude sulfur pump and the separation of liquid sulfur and slag, the sulfur loss is reduced, and the filter is conducive to being cleaned.

Description

technical field [0001] The invention relates to the field of sulfuric acid production, in particular to a pressure relief device for a sulfur-dissolving filter. Background technique [0002] Sulfur sulfuric acid uses solid raw material sulfur, and impurities in industrial sulfur must be removed before it can be used for sulfuric acid production. In this process, solid sulfur is first melted into liquid sulfur, and then filtered, settled and refined before it can be qualified for incineration. [0003] Filtration of liquid sulfur is the most important part of sulfur refining. First, pre-coat the leaf filter with diatomaceous earth, and then filter with a certain flow and pressure after passing the filter. After the filter residue is full, it must be cleaned and removed. Before slag removal, the filter must be depressurized. During the initial depressurization, the inlet of the filter and the return valve should always be kept open for depressurization. The flow back to the c...

AI Technical Summary

Problems solved by technology

Before slag removal, the filter must be depressurized. During the initial depressurization, the inlet of the filter and the return valve should always be kept open for depressurization. Returning to the crude sulfur tank through the pump outlet often leads to blockage of the pump outlet; in this way of natural pressure relief, the proportion of liquid sulfur in the final sulfur slag is still relatively high, and the annual loss of sulfur is nearly 200 tons

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