FIELD: food industry.
SUBSTANCE: invention is intended for use in food industry, agriculture at destruction of pests in grain, food products, dried fruit, tobacco, as well as in containers, vehicles and premises for processing and storage. Method of production of gas fumigant as a mixture of phosphine and carbon dioxide is carried out in two-chamber reactor using initial reagents, as which there is a mixture placed mainly in the first chamber, which contains metal phosphide, a substance producing carbon dioxide and a binder during chemical endothermic process, and in the second there is an aqueous acid. At that in the lower layers of the mixture with a metal phosphide, contained in the first chamber, a mixture containing a substance that contributes to loosening of the mixture with metal phosphide, which is used as hydroxy carboxylic acid or dicarboxylic acid, is inserted, as well as a hydrophobic compound, which interaction with a mixture formed in the process evolves carbon dioxide. The average rate of production of gas fumigant is regulated by opening the specified number of holes made on the side of the vertical message channel of the two chambers, and the ratio of the lateral hole diametre and the inside diametre of the vertical channel is in range of 0.2-0.4. To produce gas fumigant a device is used that includes a reactor which is at least one block of two interconnected through a vertical message channel chambers, the first of which is designed to contain the mixture containing metal phosphide, a substance forming carbon gas and binder at chemical endothermic process, and the second is for aqueous solution of acid and is made with a hole to drain the gas fumigant. The first chamber is coaxially located towards the second chamber and is rigidly fixed at its bottom with overlapping side wings on the cover of the first chamber and on the side of the inner surface of the body of the second chamber. The vertical message channel of the chambers passing through the holes in the covers of the first and second chambers has at least two thru holes located on its lateral surface. In the inner cavity of the vertical channel there is a stock made with the possibility of reciprocating movement. The lower part of the vertical channel is rigidly connected to the cover of the first chamber and the upper part is connected to the cover of the second chamber and is made with the possibility of regulating the volume of the first chamber. Versions of the device to generate fumigant gas provide a chambers connection through a threaded connection or making the chambers with a common bottom.
EFFECT: reduction of time of generating gas fumigant; providing control of the speed of generating fumigant gas, depending on the conditions and a fumigation facility; to simplify the device startup of generating gas fumigant.
14 cl, 5 ex, 11 dwg
