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Method for extracting crystal from magma

A crystal slurry and crystal technology, which is applied in the direction of solution crystallization, feeding/discharging device of settling tank, settling tank, etc., can solve the problems of low bulk density, difficult to dry, high water content, etc. Excellent agglomeration performance and large processing capacity

Active Publication Date: 2014-12-03
COFCO BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for extracting crystals from crystal slurry, which can effectively solve the problems of crystal adhesion, low product bulk density, high water content, difficult drying and easy caking to obtain high-quality crystal products

Method used

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  • Method for extracting crystal from magma
  • Method for extracting crystal from magma
  • Method for extracting crystal from magma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This embodiment is used to illustrate the utilization of the present invention figure 2 The shown crystal slurry liquid elutriation device extracts the method for crystal from the citric acid crystal slurry.

[0056] The crystal slurry elutriation device comprises an elutriator tank e with an open top, a crystal slurry feed pipe a, an elutriation liquid feed pipe b and a sump f connected to the top of the elutriator tank e, so The bottom of the elutriator tank e is provided with a crystal outlet d, and one end a1 of the crystal slurry feed pipe a extends into the inside of the elutriator tank e from the top of the elutriator tank e, and the other end a2 The port of the elutriator tank body e is higher than the top port of the elutriator tank body e, and one end b1 of the elutriation liquid feed pipe b extends into the inside of the elutriator tank body e from the side wall of the elutriator tank body e, and the other end b2 The port of is located outside the elutriato...

Embodiment 2

[0060] This embodiment is used to illustrate the utilization of the present invention figure 2 The shown crystal slurry liquid elutriation device extracts the method for crystal from the citric acid crystal slurry.

[0061] Extract citric acid crystals from the citric acid crystal slurry according to the method of embodiment 1, the difference is that the length of the crystal slurry feed pipe a stretching into the elutriator tank e is 560mm, and the length of one end a1 of the crystal slurry liquid feed pipe a The minimum distance from the port to the elutriation solution feed pipe b is 1120mm; the elutriation solution used is deionized water; the flow rates of the citric acid crystal slurry and the elutriation solution are 11m 3 / h and 1m 3 / h.

[0062] The solid obtained by centrifugal separation (the water content is 0.82% by weight) is dried to obtain anhydrous citric acid crystal product. The content of anhydrous citric acid crystals in the obtained anhydrous citric a...

Embodiment 3

[0064] This embodiment is used to illustrate the utilization of the present invention figure 2 The shown crystal slurry liquid elutriation device extracts the method for crystal from the citric acid crystal slurry.

[0065] Extract citric acid crystals from the citric acid crystal slurry according to the method of Example 1, the difference is that the crystal slurry feed pipe a stretches into the elutriator tank e and is the port of one end a1 of the 1400mm crystal slurry feed pipe a in length The minimum distance to the elutriation solution feed pipe b is 560mm; the elutriation solution used is the feed liquid before concentrated crystallization in the citric acid extraction process, and the saturation is 100%; the flow rates of the citric acid crystal slurry and the elutriation solution are 7m 3 / h and 1m 3 / h.

[0066] The solid obtained by centrifugal separation (the water content is 0.86% by weight) is dried to obtain anhydrous citric acid crystal product. The content...

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Abstract

The invention discloses a method for extracting crystal from magma. The method is performed in a magma washing device, wherein the magma elutriation device comprises an elutriator tank, a magma feed pipe and an elutriation liquid feed pipe; the bottom of the elutriator tank is provided with a crystal discharge port; one end of the magma feed pipe extends from the top of the elutriator tank into the elutriator tank; one end of the elutriation liquid feed pipe extends from a side wall of the elutriator tank into the elutriator tank; and a port at the end of the elutriation liquid feed pipe is positioned between a port at the end of the magma feed pipe and the crystal discharge port. The method comprises the following steps of: feeding magma and elutriation liquid from the other end of the magma feed pipe of the elutriation device and the other end of the elutriation liquid feed pipe into the elutriator tank to contact respectively; and discharging the contacted crystals from the crystal discharge port. According to the method, continuous elutriation of the magma can be realized, the operation is easy and the treatment capacity is large.

Description

technical field [0001] The invention relates to a method for extracting crystals from crystal slurry. Background technique [0002] At present, in the industry, the crystal slurry obtained after crystallization is generally directly separated from the solid and liquid, but the crystal particles obtained in this way are widely distributed, and the large particle crystals will adhere to many small particle crystals, resulting in low bulk density, high moisture content, and easy Caking. [0003] Therefore, it is extremely important to develop a new method for extracting crystals from crystal slurry to solve the problems of crystal adhesion, low product bulk density, high water content, difficult drying and easy caking. Contents of the invention [0004] The object of the present invention is to provide a method for extracting crystals from crystal slurry, which can effectively solve the problems of crystal adhesion, low product bulk density, high water content, difficult dry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D9/02B01D21/24B01D21/02
Inventor 夏令和满云许贵珍周维英廖四祥
Owner COFCO BIOTECHNOLOGY CO LTD
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