Even pressure diffusing device for coal gas of pressure vessel and use method of even pressure diffusing device

Abstract

A even pressure diffusing device for coal gas of a pressure vessel and a use method of the even pressure diffusing device belong to the technical field of iron making in metallurgical engineering. The even pressure diffusing device comprises an even pressure device, a diffusing device and a safety device, wherein the even pressure device consists of an even pressure gas source, a balance valve, a bag-type dust collector, a cyclone dust collector, the pressure vessel and the like which are connected in series; the diffusing device consists of a diffusing valve, a cyclone dust collector, a bag-type dust collector, a pore plate, a coal gas discharge pipeline and the like which are connected in series; the safety device consists of a safety valve, a coal gas discharge pipeline and the like which are connected in series; during pressure equalizing, the diffusing device is stopped, and the even pressure device is started to realize even pressure; and during diffusing, the pressure sharing device is started, and the safety device is started to achieve the safety function when the pressure in the pressure vessel is instantaneously 0.3-0.32 Mpa higher than the upper limit of the set safety pressure. The even pressure diffusing device has the advantages that pollution and emission are both low, the environment is improved, and the equipment service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of metallurgical engineering, and in particular relates to a pressure equalizing and releasing device for gas in a pressure vessel and a use method thereof. Background technique [0002] The process characteristics of pressure equalization and release of weighing tanks on the top of blast furnace are: medium working pressure: 0-0.3MPa. Cycle alternately between high pressure and normal pressure state, repeating itself. Change states up to 15 times per hour. The instantaneous processing air volume is large, reaching 10-15Nm 3 / s, the duration is short 15-20s, and the dust content of raw coal gas discharged into the atmosphere is about 20-30g / Nm 3 . [0003] The tundish tank of the ash unloading process in the blast furnace crude gas system also has a gas pressure equalization release process similar to the furnace top weighing tank, which also needs to release the high-pressure gas in the pressure vessel ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a device for pressure equalization and release of pressure vessel gas and its use method, which solves the problems of high pollution in pressure vessel gas equalization and release in traditional ironmaking technology, and the bag dust collector of the fine dust removal device is easily damaged and easily blocked.

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