Bypass ventilation process and equipment

Abstract

The invention belongs to the field of cement production process, and particularly relates to a bypass ventilation process and equipment. The bypass ventilation process comprises the following steps that step 1, high-temperature bypass flue gas with the temperature of 950-1250 DEG C extracted from a smoke chamber is subjected to dust collecting through a cyclone tube, the collected dust is returnedto a decomposing furnace or the smoke chamber, and enters a rotary kiln; step 2, after the high-temperature bypass flue gas after the treatment of the step 1 is mixed with cold air, the temperature of the high-temperature bypass flue gas is quenched and cooled down to 500 DEG C or below, and harmful components in the flue gas are agglomerated into solid particles; and step 3, the flue gas after quenching is subjected to dust collecting by a dust collector, and the dust which is not collected in the step 1 and the newly formed solid particles in the step 2 are collected, and the collected dustinside the dust collector is exhausted. The invention provides the bypass ventilation process and equipment which can effectively reduce the dust discharging amount of the bypass ventilation system and reduce the difficulty of disposal.

Description

technical field [0001] The invention belongs to the field of cement production technology, and in particular relates to a bypass ventilation process and equipment thereof. Background technique [0002] When the harmful elements in the cement raw materials are high or the waste is co-processed by the cement kiln, the alkali, chlorine and sulfur compounds brought in by the raw materials will form a cyclic enrichment in the firing system, rings and balls will appear in the kiln, and the smoke chamber at the kiln tail 1. The bottom cyclone is blocked by crust, and the firing system cannot continue to operate normally. Bypass venting technology is an effective measure to solve the problem of harmful substance circulation and enrichment. Through bypass ventilation, a part of the flue gas containing high concentrations of harmful components can be discharged from the system, so that the harmful substance circulation and enrichment can reach a balanced state. [0003] At present, t...

AI Technical Summary

Problems solved by technology

[0002] When the harmful elements in the cement raw materials are high or the waste is co-processed by the cement kiln, the alkali, chlorine and sulfur compounds brought in by the raw materials will form a cyclic enrichment in the firing system, rings and balls will appear in the kiln, and the smoke chamber at the kiln tail , The bottom cyclone is blocked by crust, and the firing system cannot continue to operate normally

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