An online plugging method for an acid plant

Abstract

The invention relates to an on-line plugging method for an acid plant, comprising: initially confirming the process gas leakage point on the surface of the acid plant equipment; removing the equipment insulation layer around the leak point, and accurately confirming the leak point; The acid plant inputs hydrogen sulfide, so that the acid plant consumes the existing hydrogen sulfide inside the device; a prefabricated metal shell is welded at the precisely confirmed leak point position, and the metal shell is a metal shell with an opening A rectangular parallelepiped metal shell is placed in the center of one side of the metal shell at the precisely confirmed leak point position during welding, and the opening of the metal shell faces upward; the pre-made grouting mud is filled into the metal shell; use the operating temperature of the acid plant to bake the grouting mud for a set time to harden the grouting mud; re-repair the equipment insulation layer near the accurately confirmed leak point; re- Input hydrogen sulfide to the acid plant to restore the normal operation of the acid plant.

Description

technical field [0001] The invention relates to the technical field of acid-making equipment maintenance, in particular to an on-line plugging method for an acid-making device. Background technique [0002] At present, in the field of chemical acid production, the WSA acid production process has been widely used. The main principle of the WSA acid production process is to use the method of peroxy combustion to incinerate hydrogen sulfide at a temperature above 1000 ℃ in an incinerator, convert it into sulfur dioxide, and then go through the process of cooling, denitrification, conversion, absorption, etc., to produce It is 98% concentrated sulfuric acid. The WSA acid production process has very strict temperature control requirements for each process. In order to ensure that the temperature of each process point meets the requirements, 90% of the outside of the entire acid production unit needs to be insulated. [0003] During the research, the inventor found that during t...

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Problems solved by technology

[0004] In view of this, in view of the above-mentioned problems, the present invention provides an online plugging method for an acid plant, which can repair leaks without stopping the operation of the whole set of acid plant, improves the maintenance efficiency of equipment, and shortens the time used. And avoid the problem that hydrogen sulfide gas cannot be processed

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