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Processing process for evaporating and concentrating sodium sulfate aqueous solution to crystallize

A sodium sulfate aqueous solution, sodium sulfate solution technology, applied in alkali metal sulfite/sulfate dehydration, sustainable manufacturing/processing, chemical industry, etc., can solve problems affecting the smooth operation of steam compressors, pipe plugging, low flow rate, etc. problems, to achieve the effects of stable protection, lower production costs, and recovery of latent heat

Inactive Publication Date: 2018-04-03
广州叶林环保科技有限公司
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Problems solved by technology

[0002] The existing processing technology of sodium sulfate crystallization adopts natural circulation, and the flow rate of the material in the heat exchange tube is low. At this flow rate, tube plugging is easy to occur. At the same time, during the evaporation process, the solution is easily entrained by gas and liquid, which affects the vapor compression. smooth operation of the machine

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  • Processing process for evaporating and concentrating sodium sulfate aqueous solution to crystallize

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] see figure 1 , the present invention provides a kind of technical scheme: a kind of processing technology of evaporation concentration sodium sulfate aqueous solution crystallization, the concrete steps of this processing technology are as follows:

[0021] S1: The pH of the sodium sulfate solution to be treated is adjusted to 5-6 in the neutralization tank. The sodium sulfate solution comes out of the neutralization tank and is preheated by the condens...

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Abstract

The invention discloses a processing process for evaporating and concentrating sodium sulfate aqueous solution to crystallize in the technical field of chemical equipment. The processing process has the following specific steps that: (S1) the sodium sulfate aqueous solution to be treated is evaporated and concentrated; (S2) materials are sent into a forced circulation evaporator, and are then sentinto a centrifugal machine for separation, and qualified mother liquid returns the forced-circulation evaporator again for secondary evaporation; (S3) secondary steam enters a compressor unit after passing through a gas-liquid separator; (S4) the secondary steam then enters an MVR (Mechanical Vapor Recompression) compressor; (S5) when the temperature of secondary-steam condensation water is reduced to be about 40 DEG C, the secondary-steam condensation water is discharged out of the system; (S6) heat-exchange evaporation is carried out and the whole system reaches heat balance. The processingprocess disclosed by the invention has the beneficial effects that steam to be abandoned originally is fully utilized, so that latent heat is recovered, the heat efficiency is improved, and the production cost is reduced; the phenomenon of pipe blocking is not easy to occur and full reuse of the secondary-steam condensation water can be achieved.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a processing technology for crystallization of evaporatively concentrated sodium sulfate aqueous solution. Background technique [0002] The existing processing technology of sodium sulfate crystallization adopts natural circulation, and the flow rate of the material in the heat exchange tube is low. At this flow rate, tube plugging is easy to occur. At the same time, during the evaporation process, the solution is easily entrained by gas and liquid, which affects the vapor compression. smooth operation of the machine. For this reason, we have proposed a kind of processing technology of evaporative concentrated sodium sulfate aqueous solution crystallization and put into use, to solve the above-mentioned problems. Contents of the invention [0003] The object of the present invention is to provide a kind of processing technique of evaporative concentration sodium su...

Claims

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Application Information

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IPC IPC(8): C01D5/18
CPCC01D5/18Y02P20/10
Inventor 何昭纯
Owner 广州叶林环保科技有限公司
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