Heat-sensitive pypocholoride cleaning and drying process based on rotary flash evaporation technology

Abstract

The invention discloses a heat-sensitive pypocholoride cleaning and drying process based on a rotary flash evaporation technology, which comprises the following steps: 1) mixing reaction slurry from a pypocholoride synthesis reaction system, a filter cake generated by separation and a pypocholoride dry material from the downstream, controlling the moisture to be 20-30%, and using mother liquor as a part of a pypocholoride synthesis raw material; (2) the mixed materials enter a rotary flash dryer to be dried, then dried products are collected through a cyclone separator, dust-containing and chlorine-containing dry tail gas is subjected to primary dust collection through a cyclone dust collector, then dust and chlorine-containing gas are removed through wet dust washing and smoke washing in sequence, the tail gas reaching the standard is discharged into the atmosphere, and the tail gas reaching the standard is discharged into the atmosphere; the scrubbing solution is used as a part of a hypochlorite synthesis raw material. According to the medium characteristics of the high-viscosity heat-sensitive pypocholoride, on the basis of keeping the high heat efficiency of rotary flash drying, the safety risks of decomposition and ignition of a heat-sensitive medium are eliminated, the washing liquid is recycled, and the safe cleaning and drying process is achieved.

Description

technical field [0001] The invention belongs to a material drying process, in particular to a cleaning and drying process for heat-sensitive hypochlorite based on a spin flash technology. Background technique [0002] When preparing hypochlorite in the prior art, a reaction slurry containing hypochlorite is obtained, which has a large water content and requires drying treatment to obtain a hypochlorite powder product. However, hypochlorite itself is a highly viscous heat-sensitive medium, and its drying has always been a bottleneck restricting chemical production, environmental protection and future capacity expansion. After the existing hypochlorite drying process is treated with a complete set of rotary flash evaporation equipment, the dust-containing chlorine-containing tail gas is discharged after the dry bag-type dust removal and the chlorine-containing tail gas treatment with an alkali-containing solution. However, due to the heat sensitivity of hypochlorite, dry Fab ...

AI Technical Summary

Problems solved by technology

However, hypochlorite itself is a highly viscous heat-sensitive medium, and its drying has always been a bottleneck restricting chemical production, environmental protection and future capacity expansion.

The existing hypochlorite drying process is treated with a complete set of rotary flash evaporation equipment, and the dusty and chlorine-containing tail gas is discharged after being treated with dry bag type dust removal and alkali-containing solution. However, due to the heat sensitivity of hypochlorite, drying There are safety accidents in bag dust removal, such as dust absorption and decomposition, and heat accumulation, which is easy to cause fire; therefore, how to realize the safe cleaning and drying of high-viscosity heat-sensitive media such as hypochlorite is a top priority.

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