EJECTOR PUMP DREDGER ZNS 630-90
Authors: assoc. prof. Bondarenko A.A.
Underwater mining and hydrotransportation of sand and gravel soils. The limiting size of pumped particles is limited by inner diameter of air feeder.
THE ESSENCE OF TECHNOLOGY
The main element of system of extraction and hydrotransportation ejector pump dredger ZNS 630-90 is the suction head SGZ 630-90, diagram of which shown in figure 1.
Suction head consist of pressure tube 1, pressure cavity 2, air feeder 3, system of ejection 4 and wash off 5 injection head, mixing chamber 6, bottleneck 7, and dredging pipe 8.
SGZ 630-90 works as follows: water in pressure pipe 1 fed under pressure into the pressure chamber 2. From the pressure chamber, water expires on through the spray burner 4 into the mixing chamber 6 and through the wash out injection heads 5 expire in array of soil blurring and pervade him. Under the influence of high-pressure water jets, flowing through the ejection heads 4 into the mixing chamber 6 into the air feeder 3 formed a region of rarefaction, under the influence of which prepared in a face soil moves in the mixing chamber 6, where the streams are mixed. Through the bottleneck 7 pulp transported to the dredging pipe 8, after which - to place of storage or recycling.
Ejector pump dredger ZNS 630-90 has passed experimental-industrial tests, which determined its operating characteristics:
The obtained results allowed to recommend ejector pump dredger ZNS 630-90 for production. Made two machines ZNS 630-90 in climatic versions "Europe" and "Africa". Currently ejector pump dredger ZNS 630-90 successfully exploited during development of river gravel in Ukraine and diamond deposits in the Republic of Liberia (Fig. 2).
Fig. 2. Ejector pump dredger ZNS 630-90
ADVANTAGES AND DISADVANTAGES
In the experimental-industrial tests ejector pump dredger ZNS 630-90 revealed such advantages and disadvantages:
“National Mining University “Dnepropetrovsk, Ukraine.