Gas velocity adjustable solid-liquid reactive gas generator and method thereof

Abstract

The invention relates to a gas velocity adjustable solid-liquid reactive gas generator and a method thereof. According to the method, a reaction liquid is added drop by drop into a reactor through a liquid pipettor from above a solid reactant; the reaction liquid flows downward and fully contacts with and completely reacts with the solid reactant so as to generate a gas; the gas generated from the reaction is discharged above the solid reactant; and a reaction effluent flows through a sieve plate and enters an effluent chamber. By adjusting a liquid adding regulating valve, dropping speed of the reaction liquid is controlled so as to adjust generation speed of the gas. Air pressure between a reaction chamber and the effluent chamber is adjusted through a pressure-equalizing pipe. By stopping dropping the reaction liquid, the reaction is terminated. According to the invention, continuous generation of a gas can be realized, and waste of a liquid reagent is little. After the reaction stops, the device is not under pressure, and there is no danger of acid liquor leakage or overflow. Control of reaction progress is safer and more convenient and reliable.

Description

technical field [0001] The invention belongs to the technical field of solid-liquid reaction-type experimental equipment for producing gas, and specifically relates to a solid-liquid reaction gas generating device capable of adjusting gas velocity for producing hydrogen, oxygen, carbon dioxide, hydrogen sulfide and other gases in a laboratory and method. Background technique [0002] At present, most of the basic devices for producing gas commonly used in university and middle school chemical experiments are Kip generators, and most Kip generators are composed of three parts: a spherical funnel, a gourd-shaped base and an air duct. In the initial use, put the instrument horizontally, add the solid reactant from the mouth of the base where the airway tube is inserted, then put the instrument upright, plug the stopper for the airway tube, and add the liquid reactant from the mouth of the spherical funnel. When in use, unscrew the piston of the air guide tube, the liquid react...

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Problems solved by technology

[0005] 2. The consumption of reagents is large. During the experiment, even if only tens of milliliters of gas is needed, 400-500mL of reaction solution is needed to carry out the experiment when using a 250mL KIP generator.

[0006] 3. The gas velocity is unstable. As the reaction progresses, the reaction liquid gradually becomes exhausted and the gas production gradually decreases, so it is not suitable for experiments that require a large amount of gas.

[0007] 4. The waste liquid is troublesome to deal with. The reaction in the Keppel generator not only has a large amount of waste liquid but also makes the reaction liquid difficult to react completely, so the processing is troublesome

[0008] 5. The gas pressure is too small. The gas pressure generated by the Kipp generator is determined by the liquid level difference between the spherical funnel and the gourd-shaped base. In experiments that require multiple gas washing, it is often unusable due to the low gas pressure.

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