Sealing technology of gas inlet pipe of WSA condenser

Abstract

The invention relates to a sealing technology of a gas inlet pipe of a WSA condenser. The sealing technology of the gas inlet pipe of the WSA condenser comprises the following technological steps: directly stretching a hard tube into a technological inlet of the WSA condenser at first so that gas containing high-concentration SO3 is directly delivered into the WSA condenser via the hard tube; welding a fixed flange on the outside of the flange, connecting a canvas flexible connector to the outside of the hard tube in a sleeving manner, and meanwhile connecting two sides of the canvas flexible connector to the outer side of a hard tube flange and the outer side of an adapter flange of a technological gas inlet of the WSA condenser respectively; primarily sealing the outer side of a tube opening of the hard tube which extends into the WSA condenser by using graphite packing which resists high temperature and acid liquor corrosion; introducing hot air at the temperature of 280-320 DEG C in a gap between the canvas flexible connector and the hard tube and continuously blowing to ensure that corrosive gas does not exist in the gap; and finally, adding a flexible connector insulating layer and a thermometer on the outside of the canvas flexible connector. The shortcomings in the original design are overcome thoroughly, the hard tube which enters the WSA condenser is protected effectively, and therefore, the purpose of stably running the WSA condenser and an acid making system for a long time is achieved.

Description

technical field [0001] The invention belongs to the technical field of WSA condensers, and relates to a sealing process for gas inlet pipes of condensers. Background technique [0002] The WSA condenser inlet pipe designed in the Topsoe (Denmark) acid system is made of high temperature and acid corrosion resistant canvas, which is used to absorb (release) the stress caused by the change of cold and heat of the pipe and equipment. Because the insulation boundary between the canvas and the previous hard pipe flange is too obvious, the junction of the canvas / hard pipe is prone to corrosion, causing the hard pipe to leak under the corrosion of high-temperature sulfuric acid, and the high-concentration SO 3 The gas leaks from the pipeline, causing health hazards to people and corroding surrounding equipment. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a sealing process for the gas inl...

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Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a sealing process for the gas inlet pipe of the WSA condenser, which can solve the problem of corrosion leakage caused by the obvious thermal insulation limit of the inlet pipe of the WSA condenser, and make the hard pipe entering the WSA condenser Get effective protection to achieve the purpose of long-term stable operation of WSA condenser and acid system

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