Instrument source taking point blockage online cleaning method and device

Abstract

The invention provides an instrument source taking point blockage online cleaning method and device. The instrument source taking point blockage online cleaning method comprises the steps: connectingone end of a working fluid pipe with a working fluid filter blow-down pipe, and connecting the other end of the working fluid pipe to an instrument source point of to-be-cleaned equipment; opening a valve of the blow-down pipe, and replacing air in the working fluid pipe by using the working fluid; after replacement is completed, closing the valve of the blow-down pipe when the pressure in the working fluid is consistent with the pressure of the working fluid filter; opening a valve at the instrument source taking point to enable the working fluid to flow into the instrument source taking point for cleaning; by utilizing the characteristics of high temperature and effective dissolution of hydroanthraquinone of the working fluid, the working fluid is injected into a pressure measuring pointof a hydrogenation tower, and the pressure is naturally released after dredging, so that the problem that the pressure cannot be accurately measured due to the precipitation of hydroanthraquinone issolved, meanwhile, the production cost is reduced without stopping dredging, and the benefit is increased to a greater extent.

Description

technical field [0001] The disclosure relates to an online cleaning method and device for blockage of a meter source point. Background technique [0002] The preparation of hydrogen peroxide by the anthraquinone method is currently used as a widely used preparation method, with 2-ethylanthraquinone as the carrier, and heavy aromatic hydrocarbons and trioctyl phosphate as the solvent to prepare a mixed liquid working solution. The working fluid is hydrogenated with hydrogen in a fixed bed at a certain temperature and pressure under the catalysis of a palladium catalyst. After the hydrogenation is completed, the liquid is oxidized with oxygen in the air. The oxidized liquid obtained is extracted and purified with pure water. Hydrogen peroxide, the working solution is recycled after alkaline washing. [0003] The hydrogenation tower runs for a certain period. Since the liquid at the pressure measuring point does not flow, anthraquinone is easy to precipitate, resulting in inac...

AI Technical Summary

Problems solved by technology

[0003] The hydrogenation tower runs for a certain period. Since the liquid at the pressure measuring point does not flow, anthraquinone is easy to precipitate, resulting in inaccurate pressure measurement, and the pressure of the hydrogenation tower is the most important safety indicator for the hydrogen peroxide process.

Since the pressure point of the hydrogenation tower is a single-phase low-inlet and high-outlet stop valve, the existing technology uses steam to heat the valve to melt the hydroanthraquinone, but the effect is not good. When the anthraquinone precipitation is serious, the pressure point can only be dredged when the device is overhauled.

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