Analysis of the designs of sapropel extraction equipment showed that from the point of view of ensuring environmental requirements and the need to extract deposits of natural humidity, airlift installations should be considered the most promising. However, to improve the conditions for extracting deposits, it is advisable to improve such installations by equipping them with mechanical rippers. For this purpose, a design was developed and an experimental installation of a pneumomechanical device for extracting sapropel was manufactured. The purpose of the study is to establish the influence of the design parameters of a pneumomechanical device for extracting sapropel on its productivity. During the study, the influence of the following factors was established: the angle of inclination of the generating cone-shaped body, the diameter of the lifting pipeline, the length of the lifting pipeline, the air supply pressure. To obtain a model of the studied process in the form of regression equations, a mathematical method of experimental planning was applied. The experiments were carried out from a boat on Lake Burkiv, Volyn region. Based on the obtained productivity values, the values of the coefficients of the regression equation, their confidence intervals and significance were calculated, and the adequacy of the regression equation was checked. Analysis of the obtained response results showed that at an air injection pressure of 500 kPa and a diameter of the transporting pipeline of 0.055 m, the productivity of the pneumomechanical device is in the range from 0.8 to 1.4 kg/s over the entire studied range of lengths of the lifting pipeline. But with increasing length of the lifting pipeline, productivity decreases. Therefore, the length of the lifting pipeline should be chosen as minimal, which will ensure the extraction of deposits with optimal humidity. Comparison of the obtained productivity values with the results of the study of a tool for extracting sapropel without a mechanical loosener indicates that the presence of the latter provides an increase in productivity of up to 10%. The suitability of the pneumomechanical tool for extracting sapropel with a humidity lower than 92% has also been established.

sapropel, extraction, pneumomechanical device, productivity, pressure, pipeline diameter

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