Abstract
The article The article examines the possibility of extracting sod fuel peat to replace imported coal. A possible raw material base is considered for producing molded solid peat-based fuel in permafrost conditions. The production of molded peat products in the form of sod peat is proposed as an option. The experimental work on drying sod peat shows that peat can be extracted and dried to standard moisture content in the conditions of northern Yakutia. A flowsheet of producing sod peat from lake peat by hydraulicking is presented. According to the flowsheet the peat mass is loosened, liquefied by lake water, sucked in by a dredger pump and pumped through a pulp pipeline to the shore, where it is dewatered in geotubes to the molding water content. After dewatering, the geotubes are cut and the peat mass is loaded into a peat spreader mixing the peat, forming it into cylindrical pieces, and spreading it on a drying field. When molded, the peat structure is modified chemically to obtain strong and durable products. Having reached sufficient strength, peat sods are piled in a stack supplied with a trench for artificial ventilation at its base. The peat is dried to a final moisture content of 24–30%.
Highlights
Verkhoyansky and other uluses of northern-eastern Yakutia can live only under the conditions of the so-called “northern delivery” when energy resources, foodstuff and goods are brought in by water transport in summer and road transport in winter
It was considered advisable to extract peat from the bottom of the lake, where the thickness of the peat layer can reach up to 5 m. This peat does not freeze under the water layer in frosts of 50... 60 degrees, characteristic of this region, so peat extraction does not depend on the degree of thawing of the deposit
Experimental work carried out in the Nenets National District and Kamchatka has shown that peat extraction is possible even under these conditions if the climate issues are taken into account and adapted to
Summary
Verkhoyansky and other uluses (settlements) of northern-eastern Yakutia can live only under the conditions of the so-called “northern delivery” when energy resources, foodstuff and goods are brought in by water transport in summer and road transport in winter. The energy sector of the area is completely dependent on delivered coal and diesel fuel. The area has no coal, gas, or oil, but plentiful peat deposits. The Government of the Sakha (Yakutia) Republic has proposed to use peat fuel for Verkhoyansky boiler houses. Peat fuel, according to preliminary calculations, should be about half the price of the delivered coal. The Government has set the task to assess the peat deposits in the Verkhoyansky district for the possibility of extracting and using peat in boiler houses for heat supply [1,2,3]
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