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Process method for improving crystallization granularity of carbonization reaction material in carbonization tower in sodium carbonate production

A technology of carbonization reaction and process method, applied in carbonate preparations and other directions, can solve problems such as affecting crystal particle size and particle size distribution

Active Publication Date: 2021-05-11
山东海天生物化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to improve the NaHCO in the material after the carbonization reaction in the carbonization tower in the traditional process 3 The particle size of the crystallization, the heat of the reaction of ammonia brine and carbon dioxide in the upper part of the carbonization tower increases the reaction temperature to increase the NaHCO 3 supersaturation, and then gradually reduce the temperature by setting a cooling water tank inside the carbonization tower (the inside of the cooling water tank is provided with a cooling water pipe) to make it produce crystal nuclei and make the crystallization grow gradually, but the size of the supersaturation and the temperature gradient Changes directly affect the nucleation process and nucleation growth process, and ultimately affect the particle size and particle size distribution of crystals in the product

Method used

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  • Process method for improving crystallization granularity of carbonization reaction material in carbonization tower in sodium carbonate production
  • Process method for improving crystallization granularity of carbonization reaction material in carbonization tower in sodium carbonate production
  • Process method for improving crystallization granularity of carbonization reaction material in carbonization tower in sodium carbonate production

Examples

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Effect test

Embodiment 1

[0017] A process for increasing the crystallization size of the carbonization reaction material in the carbonization tower in the production of soda ash. The carbonization reaction material in the carbonization tower enters the separator through the material conveying pipeline, and the material liquid located in the upper part of the separator after separation enters through the return pipe. The interior of the carbonization tower participates in the carbonization reaction.

[0018] The distance between the center of the reflux port connected with the reflux pipe on the carbonization tower and the bottom of the carbonization tower is 944.5 cm.

[0019] Wherein the distance between the center of the outlet of the carbonization tower connected with the material delivery pipeline and the bottom of the carbonization tower is 30cm.

[0020] Among them, there is a material delivery pump on the material delivery pipeline, the head of the material delivery pump is 42m, and the flow ra...

Embodiment 2

[0022] A process for increasing the crystallization size in the carbonization tower in the production of soda ash. The carbonized material in the carbonization tower enters the separator through the material conveying pipeline, and the material liquid at the upper part of the separator enters the interior of the carbonization tower through the return pipe after separation. Participate in carbonization reactions.

[0023] Wherein the distance between the center of the reflux port connected with the reflux pipe on the carbonization tower and the bottom of the carbonization tower is 1100.5 cm.

[0024] Wherein the distance between the center of the discharge port connected with the material conveying pipeline on the carbonization tower and the bottom of the carbonization tower is 28cm.

[0025] Wherein the material conveying pipeline is provided with a material conveying pump, the head of the material conveying pump is 45m, and the flow rate is 22m 3 / h, the outlet pressure is a...

Embodiment 3

[0027] A process for increasing the crystallization size in the carbonization tower in the production of soda ash. The carbonized material in the carbonization tower enters the separator through the material conveying pipeline, and the material liquid at the upper part of the separator enters the interior of the carbonization tower through the return pipe after separation. Participate in carbonization reactions.

[0028] Wherein the distance between the center of the reflux port connected with the reflux pipe on the carbonization tower and the bottom of the carbonization tower is 1234.5 cm.

[0029] Wherein the distance between the center of the outlet of the carbonization tower connected with the material delivery pipeline and the bottom of the carbonization tower is 30cm.

[0030] The head of the material transfer pump is 48m, and the flow rate is 18m 3 / h, the outlet pressure is about 0.6MPa.

[0031] Wherein the separator in the embodiment 1-3 comprises a body, and the b...

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Abstract

The invention relates to the technical field of sodium carbonate production, in particular to a process method for improving the crystallization granularity of a carbonization reaction material in a carbonization tower in sodium carbonate production. According to the process, the material subjected to carbonization reaction in the carbonization tower is fed into a separator through a material conveying pipeline; and after separation, feed liquid positioned at the upper part of the separator enters the carbonization tower through a return pipe to participate in carbonization reaction. According to the process method, the crystal granularity of NaHCO3 in the carbonization tower is improved, and the crystal granularity distribution is uniform.

Description

technical field [0001] The invention relates to the technical field of soda ash production, in particular to a process for increasing the crystallization size of carbonization reaction materials in a carbonization tower during soda ash production. Background technique [0002] In the production of soda ash, the carbonization of ammonia brine is the most complex process involving many process conditions and physical and chemical changes. Its operating status and process indicators directly affect the product output, quality and material consumption, and play a decisive role in the economic benefits of the enterprise. Production requires that in the carbonization process of the soda tower, NaHCO with coarse particles should be produced as much as possible under the condition of improving the conversion rate of NaCl. 3 Crystallization, the present carbonization process of CO 2 The gas enters from the bottom of the tower and the middle of the tower in two stages, and the pre-c...

Claims

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Application Information

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IPC IPC(8): C01D7/12C01D7/18
CPCC01D7/12C01D7/18Y02P20/141
Inventor 张家利王国银
Owner 山东海天生物化工有限公司
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