Mini plant for preparation of gas

The utility model provides a micro device for gas preparation, which comprises a gas generator, an air washer, a dehumidifier and a gas extractor; wherein the gas generator, the air washer, the dehumidifier and the gas extractor are connected in turn. The utility model is characterized in that: the gas generator is composed of a U-tube and a solid support which comprises an object stage and a support frame, and the support frame is fixed under the object stage; the solid support is arranged in the U-tube. The utility model has the advantages of reducing the cost of the equipment, reducing the consumption of the reagent to 5% compared to the routine test, and then reducing the discharge of the three wastes and environment pollution, meeting the requirement of the energy saving society by recycling the solid household garbage in the micro device. The utility model has the same method as the routine test, and the experimental result meets the necessity with the routine text, being worth extending in the teaching of the inorganic experiments.