Method for automatically controlling and adjusting sodium hydrosulfite synthesis system pressure and backflow quantity

A technology of automatic adjustment and system pressure, applied in the direction of thiosulfate/dithionite/polythionite, etc., can solve the problem of poor pressure stability of hydrosulfite synthesis reaction, poor hydrosulfite synthesis reaction stability, and hydrosulfite quality. Instability and other problems, to achieve the effect of solving uncertainty and instability, low production cost and stable product quality

Active Publication Date: 2013-11-06
烟台市金河保险粉厂有限公司
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Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a method for automatically controlling and adjusting the pressure and return flow of the hydrosulfite synthesis system, which can solve the problems of poor pressure stability, uneven return flow, and poor stability of the hydrosulfite synthesis reaction. Defects such as unstable quality of sodium bicarbonate and high production cost

Method used

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Embodiment

[0019] A method for the automatic control system to adjust the pressure and return flow of the hydrosulfite synthesis system, which is realized according to the following steps:

[0020] (1) Neutralize and adjust the value: under normal temperature and normal pressure, add 1200L of AE liquid material into the synthesis reaction kettle, start stirring, open the jacket steam of the synthesis reaction kettle and slowly heat up to 75°C~80°C, set the synthesis reaction kettle The internal pressure is 0.15Mpa, the pressure in the reaction kettle is automatically adjusted through the automatic adjustment valve of the synthesis tail gas discharge, and the tail gas return flow rate is set to 3L / s at the same time, and the tail gas return flow in the synthesis reaction kettle is automatically adjusted through the tail gas return flow automatic adjustment valve , add the AME liquid material into the synthesis reaction kettle until the pH value of the material in the synthesis reaction ket...

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Abstract

The invention relates to a method for automatically controlling and adjusting sodium hydrosulfite synthesis system pressure and backflow quantity, which adopts an automatic control system to adjust the sodium hydrosulfite synthesis system pressure and the backflow quantity, has scientific process steps and process parameters and effectively resolves the problems of uncertainty and instability of pressure and backflow quantity in the manual control and adjustment of the sodium hydrosulfite synthesis system. The method enables sodium hydrosulfite combining reaction to be good in stability, even in backflow quantity, stable in sodium hydrosulfite quality and low in production cost.

Description

technical field [0001] The invention relates to a hydrosulfite synthesis technology, in particular to a method for automatically controlling the pressure and return flow of a hydrosulfite synthesis system. Background technique [0002] Sodium dithionite (sodium hydrosulfite) has a wide range of uses. In the printing and dyeing industry, it can be used as a reducing agent for vat dyes, it can be used for reduction cleaning for disperse dyes, it can be used for stripping of reactive dyes, bleaching of silk and wool, and in pulp and papermaking. In the industry, it is used as a bleaching agent for mechanical pulp, thermomechanical pulp and deinked pulp. It is also used in medicine, mineral processing, synthesis of thiourea and its sulfides, etc. The molecular formula of sodium dithionite is: Na 2 S 2 o 4 , under the condition of methanol as a solvent, react with sodium formate, sodium pyrosulfite and sulfur dioxide, and then press filter, wash, dry, cool, blend, discharge an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/66
Inventor 张宝健王国清张心遵邹广柱
Owner 烟台市金河保险粉厂有限公司
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