SU47677A1 - Method for inorganic dehydration - Google Patents

Description

The disadvantages of the existing methods of smelting and dehydrating inorganic compounds, especially caustic soda (caustic soda and potassium), are well known. Continuously operating installations are complex and require imported equipment, but the methods of smelting in boilers adopted in the USSR have negative aspects: the periodicity of the process, its duration, the need for large production rooms, rapid boiler wear, low fuel utilization, and caustic contamination during the smelting process with iron, the difficulty of service and t; P.

To eliminate these drawbacks, the following method of continuous caustic smelting is proposed, based on spraying of one stripped liquor with hydrogen pressure followed by a hedge of the latter.

The method consists in the following. Hydrogen from the gasholder is supplied by the compressor to the injector, captures the caustic solution heated preheated on the vacuum apparatus, mixed with the air introduced into the stream (preferably enriched with oxygen) and introduced into the chamber through the appropriate nozzle, after which this mixture of gases with finely sprayed caustic .

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passes through a continuously operating igniter (ensuring the combustion of all hydrogen and preventing accumulation of detonating gas), which is located in the chamber, where it is burnt, and the dehydrated and sprayed caustic is collected in the lower part of the chamber, from which it is continuously removed.

The presence of a highly developed surface of the sprayed caustic, the direct contact of the liquid with the flame and the high temperature of the latter create exceptional conditions for heat transfer, which allows, with appropriate adjustment of the flow of hydrogen and caustic, to achieve a continuous, very intensive dehydration process.

For this case (caustic smelting) as a combustible gas, it is advisable to use only hydrogen, as a gas that does not produce carbon dioxide as a result of combustion, which reacts with caustic. For cases of dehydration of other compounds that do not react with carbon dioxide, the use of any combustible gas (generator, methane, gases of pyrogenic cracking of oil, etc.) is possible.

In addition, a particular advantage of this method is the possibility of obtaining a high quality caustic.

(not containing iron impurities), as well as the fact that hydrogen is utilized in its use, which is an unused waste in the process of electrolytic production of caustic soda. Estimates of the thermal balance of the process show that using waste hydrogen can dehydrate more than 50 / d

all of the caustic produced by electrolysis, and since a significant part of caustic in our conditions is sent to consumers in the form of liquors, then with the successful instrumentation of this method it will allow

do without the method of smelting in boilers used in our factories, which

has great national economic significance.

The subject invention.

Claims (2)

1. A method for the dehydration of inorganic compounds by spraying concentrated solutions thereof, characterized in that these solutions or molten masses are sprayed into a jet of combustible gas or by post-injection or some other mechanical method followed by combustion of the combustible gas. 2. Acceptance of the method of claim 1, characterized by the use of hydrogen as a combustible gas in the dehydration of caustic alkalis.