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Method and device for preparing ammonium sulfate and sodium bicarbonate from sodium sulfate and ammonium bicarbonate

A technology of ammonium bicarbonate and sodium bicarbonate, which is applied in the field of chemical technology, can solve the problems of large consumption of chemicals, large equipment footprint, and high production cost, and achieve high utilization rate, small equipment footprint, and reduced energy consumption Effect

Active Publication Date: 2021-05-28
浙江志澄环境资源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method consumes a lot of medicaments, the equipment occupies a large area, and the production cost is high.

Method used

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  • Method and device for preparing ammonium sulfate and sodium bicarbonate from sodium sulfate and ammonium bicarbonate
  • Method and device for preparing ammonium sulfate and sodium bicarbonate from sodium sulfate and ammonium bicarbonate

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Embodiment Construction

[0032] In order to make the above objects, features and advantages of the present invention more comprehensible, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, the terms "A", "B", "C", "D", "one", "two", "three", and "four" are only used to distinguish similar objects, not Represents a specific ordering for objects, and "A", "B", "C", "D", "One", "Two", "Three", "Four" are understandably interchangeable where permitted A specific sequence or sequence is required to enable the embodiments of the invention described herein to be practiced in sequences other than those illustrated or described herein.

[0034] The invention provides a kind of method that prepares ammonium sulfate and sodium bicarbonate with sodium sulfate and ammonium bicarbonate, comprises the steps:

[0035] S1. The sodium sulfate stock solution and the ammonium bicarbonate stoc...

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Abstract

The invention relates to a method and a device for preparing ammonium sulfate and sodium bicarbonate from sodium sulfate and ammonium bicarbonate. The method comprises the following steps of pretreating a sodium sulfate stock solution and an ammonium bicarbonate stock solution, so that sodium sulfate and ammonium bicarbonate pass through an electrodialysis unit arranged in an electric field, recombining sodium ions and sulfate ions in the sodium sulfate stock solution and ammonium ions and bicarbonate ions in the ammonium bicarbonate stock solution to form an ammonium sulfate solution and a sodium bicarbonate solution, and leading out the ammonium sulfate solution and the sodium bicarbonate solution to an evaporative crystallization unit to obtain ammonium sulfate crystals and sodium bicarbonate crystals. By arranging the electrodialysis module, ions of the sodium sulfate stock solution and the ammonium bicarbonate stock solution are re-paired to form the concentrated solution, and the concentrated solution is evaporated and crystallized to prepare the high-purity sodium bicarbonate crystal and ammonium sulfate crystal, so that the whole technological process is free of additional chemicals, the chemical adding cost is saved, the technological process is short, the required equipment is small in occupied area, and the utilization rate of the raw material medicament is higher.

Description

technical field [0001] The invention relates to the field of chemical technology, in particular to a method and a device for preparing ammonium sulfate and sodium bicarbonate from sodium sulfate and ammonium bicarbonate. Background technique [0002] Soda ash, scientific name sodium carbonate (Na 2 CO 3 ), the form is usually white powder, it is not easy to decompose under high temperature conditions, it is easily soluble in water, and its aqueous solution is alkaline. Soda ash is an important basic chemical raw material and one of the two alkalis in the "three acids and two alkalis". It has the reputation of "the mother of chemical industry". It occupies a very important position in the national economy. The soda ash industry is a resource-dependent low-threshold industry. As an important basic industrial raw material, no matter whether it is soda ash or glass, there is no competitive substitute under the current technical conditions. Ammonium sulfate ((NH 4 ) 2 SO 4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/244C01D7/02
CPCC01C1/244C01D7/02
Inventor 王大新施小林温春兴杨鹏
Owner 浙江志澄环境资源科技有限公司
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