METHOD FOR TWO-STAGE CLEANING OF SEWER WELLS AND LIQUID MANURE PITS Russian patent published in 2022 - IPC E03F5/08 

FIELD: sewerage systems.

SUBSTANCE: invention relates to the field of sewerage systems. The method consists in supplying clean air into the space of an open vertical well of a liquid manure pit at a pressure of up to 2.8 kg/cm² with the possibility of increasing its speed at the bottom of an open vertical well of a liquid manure pit and removing polluted air for 5-7 minutes by a thrust source, creating a vacuum in the well up to 0.4 kg/cm², with continuous determination of the type of gas and his concentration. Then the process is repeated. The supply of injected air is provided to the 100% zone of the vertical well of the liquid manure pit with at least a 3-layer flow, and all horizontal layers of at least 3-layer gradation horizontally form overlapping zones of this supply, increasing the percentage of the concentration of mixing this air with hazardous gases located in the well-liquid collector by 45%. Further, the possibility of circular cleaning of the inner walls of the well of the liquid manure pit is realized by means of fresh jets of injected air due to its uniform supply from the injection and exhaust pipeline along three-layer vectors by means of annular hollow tubes with holes connected to the inner space of the specified pipeline along tubular radii with holes on four sides by eight formed sectors bounded on the annular pipeline by the specified radii, connected to the inner surfaces of at least 3 annular pipes on every eighth part of the length of the circle formed by the annular pipe. The outer diameter of the sector pipes in all three sectors is 0.95 of the diameter of the well of the liquid manure pit, which ensures the proximity of the output of the vectors of the injected air from the outer holes of the annular sector pipes of at least 5 mm, which makes it possible to remove from the inner surfaces of the well of the liquid manure pit deposits and traces of residues of substances that previously filled the space of the liquid manure pit, pressure fresh air supply, collecting these residues in a cone-shaped container at the bottom of the well of the liquid manure pit.

EFFECT: intensive mixing of fresh air with harmful gases is provided in the entire space of the liquid manure pit, including stagnant zones in the lower part, where gases with increased density accumulate.

3 cl, 1 dwg