technical and economic study of drying and granulation of ... - Helcom
technical and economic study of drying and granulation of ... - Helcom
technical and economic study of drying and granulation of ... - Helcom
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No. Type <strong>of</strong> operation Model<br />
1<br />
Constant volume<br />
supply <strong>of</strong> manure<br />
Table 5. Specifications <strong>of</strong> receiving <strong>and</strong> feeding bin for raw manure<br />
Number<br />
<strong>of</strong> units<br />
Throughput, t/h<br />
Installed power,<br />
kW<br />
ПРТ-10 1 4 7<br />
From the feeding bin the manure is taken by УКВ 106 conveyor (pos. 2) to the <strong>drying</strong> cylinder with<br />
the heat exchanger manufactured by PromTechProject-SPb Ltd., where the moisture is removed. To process<br />
80 t <strong>of</strong> manure two <strong>drying</strong> cylinders are required (pos. 4) with the overall throughput <strong>of</strong> 4 t/h by the raw<br />
manure (2 t/h for every cylinder). Consequently, twenty hours operating mode should be set for this<br />
equipment.<br />
No. Type <strong>of</strong> operation Model<br />
2<br />
Manure loading<br />
from the feeding<br />
bin to the <strong>drying</strong><br />
cylinder<br />
Table 6. Specifications <strong>of</strong> raw manure conveyor<br />
Number <strong>of</strong><br />
units<br />
Productivity,<br />
t/h<br />
Installed power,<br />
kW<br />
УКВ-106 2 6 4.4<br />
Table 7. Specifications <strong>of</strong> the <strong>drying</strong> cylinder with the heat exchanger manufactured by<br />
PromTechProject-SPb Ltd.<br />
No. Type <strong>of</strong> operation Model<br />
4<br />
Manure <strong>drying</strong> to<br />
10 to12 % <strong>of</strong><br />
moisture content<br />
АСЗ-5-4 <strong>drying</strong><br />
cylinder<br />
Number <strong>of</strong><br />
units<br />
Throughput,<br />
t/h<br />
Installed power,<br />
kW<br />
2 4 100<br />
To dry the chicken manure the air heated to 200 °C is supplied to the cylinder. Diesel heat-generator<br />
(pos. 3) is used to heat the air as there is no gas supply on the poultry factory.<br />
No. Type <strong>of</strong> operation Model<br />
3<br />
Air heating <strong>and</strong><br />
hot air supply to<br />
the <strong>drying</strong><br />
cylinder<br />
Table 8. Specifications <strong>of</strong> the diesel heat-generator<br />
Number <strong>of</strong><br />
units<br />
Heat<br />
generating<br />
capacity,<br />
MW/h<br />
Diesel fuel consumption,<br />
L/h<br />
2 8 400<br />
The heat is generated by diesel fuel combustion.<br />
Another option is to use granulated manure as a fuel. In this case around 40 % <strong>of</strong> produced granulated<br />
manure is to be combusted. This technology has not been applied in large scale before, <strong>and</strong> additional <strong>study</strong><br />
is needed. The <strong>economic</strong> effect <strong>of</strong> this option may be rather high as shown in Item 4 below.<br />
The manure mass after <strong>drying</strong> m cn with 12 % moisture content that meets technological requirements to<br />
granulated manure is defined by the formula:
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