Belarusian National Technical University, Minsk, Belarus:

I. E. Amelishko, Assistant, fes@bntu.by
V. V. Ivashechkin, Dean at the Power Facilities Construction Faculty, Professor, Doctor of Engineering Sciences

Groundwater is mainly used for water supply of cities, rural settlements and industries in the Republic of Belarus. About 90% of water wells operate at reduced specific production rates as a consequence of biological and chemical clogging. Due to the insufficient efficiency of existing regeneration methods, the average service life of water wells rarely exceeds 18–20 years, which is significantly shorter than the estimated life. In this regard, creation of the effective and simple regeneration methods is becoming an urgent scientific and practical problem of great importance. A reversible pulse-and-chemical regeneration assembly has been designed for water wells; it consists of a compressor, hoses and a submersible device in the form of a two-chamber pneumatic displacement pump. The advantage of this assembly is the absence of a circulation pump in its configuration and the possibility of efficient treatment of a limited filter interval. A technology for the regeneration of water wells using the reversible pulse-and-chemical regeneration assembly is proposed. The installation, hoisting and other related operations should be carried out using a truck crane with a telescopic lifting boom. The reagent can be universal acid cleansing agent Deskam TU RB 37430824.001-97. One of the advantages of water well regeneration using the proposed assembly is the reverse movement of the reagent in gravel filter. Two regeneration modes were tested on a laboratory scale: the reversible flow and one-way flow of the reagent. The analysis of the laboratory research data shows that the use of the reversible mode of the reagent movement significantly reduces the cleaning time required for the removal of colmatant from the gravel filter as compared with the one-way flow of the reagent.

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