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Technology and device for reducing water content in sodium bicarbonate by using filter aid

A filter aid, alkaline water technology, applied in separation methods, chemical instruments and methods, alkali metal carbonates to change crystal water content, etc. Effect

Inactive Publication Date: 2006-10-11
TIANJIN BOHUA YONGLI CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Disadvantages of this production process: 1. Waste of manpower, special personnel are required to prepare filter aid dilution every day
2. Waste of material resources, because the concentration of filter aid is low, a pump needs to run continuously
3. Adding in the washing water, due to the influence of washing water temperature, washing water volume, mixing degree, contact time and other factors, the effect of precipitation is worse than that of the new process

Method used

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  • Technology and device for reducing water content in sodium bicarbonate by using filter aid
  • Technology and device for reducing water content in sodium bicarbonate by using filter aid
  • Technology and device for reducing water content in sodium bicarbonate by using filter aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The stock solution of filter aid is directly added into the alkali discharge tank after being measured by a flow meter, and the dosage of filter aid is 150ppm per ton of soda ash.

[0027] The filter aid used in this test is provided by Tianjin Ruiding Industry and Trade Development Co., Ltd. Its main components are low molecular weight esters, which are colorless or light yellow transparent liquid with a density of 1.000~1.100g / cm 3 , the pH value is 6-8.

[0028] Moisture reduction

[0029] Note: This table lists representative data.

Embodiment 2

[0031] The filter aid stock solution is pumped into the filter aid tank, and water is added to the filter aid tank at the same time to prepare a filter aid dilution solution with a weight percentage of 90%. After being measured by a flow meter, it is sprayed into the alkali outlet tank , The weight of filter aid is 150ppm per ton of soda ash.

[0032] The filter aid selected is the same as in Example 1.

[0033] Moisture reduction

[0034] Note: This table lists representative data.

Embodiment 3

[0036] The filter aid stock solution is pumped into the filter aid tank, and at the same time, water is added to the filter aid tank to prepare a filter aid dilution solution with a weight percentage of 80%. After being measured by a flow meter, it is sprayed into the alkali outlet tank , The dosage of filter aid is 150ppm per ton of soda ash.

[0037] The filter aid selected is the same as in Example 1.

[0038] Moisture reduction

[0039] Note: This table lists representative data.

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Abstract

The present invention disclosed the process and device of the application of filtrate to reduce the water. It includes the following steps: adding the filter solution with a weight of 70-100 % to the alkali groove, the addition of the filter agent's added amountThe amount of consumption filter per ton of soda soda is 150-300 ppm.The method of the present invention saves human resources and material resources, eliminating the posting of diluted liquids in the formulation of filtrate, and does not need to run constant operation.What's more important is that under the same operating conditions of pure alkali consumption filter agent, it is better to reduce heavy alkaline water than traditional techniques.

Description

technical field [0001] The invention relates to a method for reducing the water content of the heavy alkali, in particular to a method for reducing the water content of the heavy alkali by using a filter aid, and simultaneously the invention also relates to a device for reducing the water content of the heavy alkali. Background technique [0002] With the increasingly intensified market competition, expanding scale and reducing costs have become the inevitable trend of soda ash production. As we all know, heavy alkali filtration is one of the important processes in the production process of soda ash, which is related to the output and quality of soda ash and whether the calciner can operate normally, and it is also related to a series of issues such as raw material consumption, power consumption, mother liquor balance, etc. In order to further reduce the water content of heavy alkali on the original basis, save steam; reduce the salt content of heav...

Claims

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Application Information

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IPC IPC(8): C01D7/35B01D37/02
Inventor 邹泽民李治水韩春兰张世有胡东岭
Owner TIANJIN BOHUA YONGLI CHEM IND
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