OSLO cooling crystallizer capable of preventing crystal scale

Abstract

The invention discloses an OSLO cooling crystallizer capable of preventing crystal scale. The OSLO cooling crystallizer comprises a crystallizer and a cooling device; the cooling device is arranged outside the crystallizer and is communicated with the crystallizer through a pipeline, the crystallizer comprises a raw material feeding pipe, a crystallization chamber and an arc-shaped baffle with anupward opening, the raw material feeding pipe enters the crystallization chamber through the top of the crystallization chamber, and an outlet of the raw material feeding pipe extends into the crystallization chamber; an opening of the arc-shaped baffle plate is arranged upwards and is positioned below an axis extension line of the raw material feeding pipe; the cooling device comprises a circulating pipeline, a circulating pump and a cooler, the crystallization chamber is communicated with the cooler through the circulating pipeline, and the circulating pump is arranged on the circulating pipeline; a nano fluorocarbon coating layer is arranged on the inner wall of the tube pass of the cooler. According to the OSLO cooling crystallizer capable of preventing crystal scale, the problems of scaling of crystals on the inner wall of the tube pass of a cooler and even blockage of a pipeline in the cooling process are solved, the operation efficiency of the device is improved, and the failurerate is reduced.

Description

technical field [0001] The invention relates to the technical field of crystallization equipment, in particular to an Oslo cooling crystallizer for preventing crystal fouling. Background technique [0002] Oslo crystallizer, also known as Krystal crystallizer, is a mother liquor circulation continuous crystallizer. The operating feed liquid is added to the circulation pipe, mixed with the circulating mother liquor in the pipe, and pumped to the heating chamber. The heated solution evaporates in the evaporation chamber and reaches supersaturation, and enters the crystal fluidized bed below the evaporation chamber through the central tube. In the crystal fluidized bed, the supersaturated solute in the solution is deposited on the surface of the suspended particles, causing the crystal to grow. [0003] The crystal fluidized bed performs hydraulic classification on the particles, the large particles are on the bottom, and the small particles are on the top, and the crystalline...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides an anti-scaling Oslo cooling crystallizer, which overcomes the deficiencies of the prior art, solves the problems of fine product particles, wide particle size distribution, and poor product quality in the production process, and ensures crystallization The crystal particle size at the outlet of the crystallizer is large and uniform, and it can effectively prevent the precipitated crystals from depositing on the heat transfer surface of the external circulation cooling device, eliminate the hidden danger of crystal scaling, and ensure the long-term operation of the Oslo cooling crystallizer

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