OSLO crystallizing device

Abstract

The invention discloses an OSLO crystallizing device and belongs to the field of chemical equipment. The OSLO crystallizing device comprises a crystallizer of which the upper end is provided with a feeding inlet, wherein two sets of cooling systems are at least connected outside the crystallizer; each cooling system comprises a circulating pipe arranged outside the crystallizer; a circulating liquid box, a main circulating pump and an outer cooler are sequentially connected to the circulating pipe along the circulating flowing direction of a material liquid; a clapboard which upwards extends from the bottom surface of the circulating liquid box, separates the lower part of the circulating liquid box and communicates the upper part of the circulating liquid box is arranged in the circulating liquid box; the upper end of the clapboard is higher than level of the material liquid in the crystallizer; the circulating pipe between the circulating liquid box and the outer cooler and the crystallizer are connected through a pouring pump pipeline; and the cooling systems are connected with an evacuating device through a vacuum pipe. According to the OSLO crystallizing device, a main circulating pump can be more conveniently repaired, and a circulating system is switched without a valve, so that high cost caused by using a stop valve with a large caliber is avoided; and meanwhile, the evacuating device is arranged, so that air in the pipe is prevented from entering the crystallizer liquid-collecting pipe to generate floating crystals.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a crystallization device. Background technique [0002] All OSLO crystallization devices are equipped with more than two sets of external coolers for regular switching and cleaning. At present, the circulating pipeline system adopts two kinds of switching devices with valves for horizontal circulating pumps and switching devices for vertical circulating pumps without valves. Horizontal circulating pump with valve switching device means that the circulating pump adopts a horizontal pump, which can be placed on the ground under the crystallizer and the external cooler, and the switching valve is set on the circulating pipeline. When the external cooler needs to be cleaned, the axial flow pump should be stopped first. , close the cut-off valve to isolate the external cooler from the crystallizer, and start cleaning the external cooler after venting. After the cleaning is complete...

AI Technical Summary

Problems solved by technology

[0004]The disadvantage of the horizontal circulating pump with valve switching device is that a large-diameter cut-off valve needs to be installed, which is expensive and inconvenient to operate when starting and stopping the external cooler; in addition, the cut-off valve It is easy to leak and the seal is not tight, resulting in material stringing during cleaning

[0005]Although the vertical circulation pump plus valveless switching device cancels the switching valve, the following problems still exist: because the vertical circulation pump is installed on the top of the crystallizer, its own vibration and The load on the crystallizer is increased, and the cost of civil construction is high; the upper part of the vertical pump needs to be removed for maintenance, and the pump is located on the top of the crystallizer. Long, especially for corrosive materials, the material of the pump body is required to be high, which increases the cost of the equipment; the drive shaft of the vertical pump itself is very long, and the shaft seal is mostly sealed with packing, which has leakage problems when the pump starts and stops

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