Energy-saving processing tehnologies and instalations for farms in the Republic of Moldova
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PHILIPP, B.. Energy-saving processing tehnologies and instalations for farms in the Republic of Moldova. In: Materials Science and Condensed Matter Physics, Ed. 6, 11-14 septembrie 2012, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2012, Editia 6, p. 266. ISBN 978-9975-66-290-1.
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Materials Science and Condensed Matter Physics
Editia 6, 2012
Conferința "Materials Science and Condensed Matter Physics"
6, Chișinău, Moldova, 11-14 septembrie 2012

Energy-saving processing tehnologies and instalations for farms in the Republic of Moldova


Pag. 266-266

Philipp B.
 
Institute of Applied Physics
 
 
Disponibil în IBN: 25 martie 2020


Rezumat

In the new socio-economic conditions, the decisive contribution in improving the efficiency of production of agricultural products with high added value belongs to reduced energy consumption in industrial cycles. In the countries with well-developed processing industry, energy costs for processing of vegetable products, including drying, make up 25-40% of the cost of final products. In Moldova, the main procedure of drying fruits and vegetables is a convective method with hot air, as well as infrared radiation (IR), solar energy and microwave radiation. The energy sources are fuel oil, natural gas or electricity, and, in rare cases, the biomass energy. In the last decade many countries use superheated steam for the processing of food crops and livestock. In this case the energy source is the same fossil fuels.To reduce the cost of the final product there are two ways the implementation of energy-saving technologies and equipment and the use of alternative energy sources, among latter the most important for us is the biomass in the form of crop residues - the cost of 1Gkal energy derived from biomass is 3-10 times less than from coal combustion, natural gas, oil or diesel fuel. We offer energy-saving technological procedures and installations for processing vegetable raw materials, which are based on the use of superheated steam as the working agent and biomass as fuel. Superheated steam, as gas, has some distinctive properties – it is chemically inert up to 10000C, not inflammable, explosion-proof; its density is 2-3 times lower that of air; It is easily produced, re-used as mass and energy; its the thermal capacity is more than 2 times higher than that of the air, easilemits energy by radiation. These properties underlie the offered technologies and installations for dehydration (drying) of vegetable materials and for processing of aromatic raw materials. Dehydration procedures and equipment. The offered technology provides the combined influence on vegetable raw materials IR radiation (4-8mkm) and superheated steam at low pressure (0,5-0,7bar, 150-1750С). The drying complex includes a boiler on diathermic oils (temperature 300-3500С) to produce thermal energy and superheated steam at biomass burning; dryers of periodic or continuous action; the equipment for preliminary dehydration of raw materials on the account of heat regeneration of deleted moisture in the form of saturated steam; the devises for washing and raw materials preparation. The superheated steam is pumped in dryers from top to bottom. The IR radiation is obtained in ceramic radiators through which high-temperature oils are pumped. The moisture from raw materials evaporates due to heating by the IR-radiation and superheated steam. The dryers of periodic action (productivity 120 and 300 kg) and continuous action (productivity 500 and 1000 kg) of the deleted moisture per hour for a wide range of products are offered to farms. Energy-saving superheated steam procedures for processing aromatic raw materials. For farms of Moldova, installations capable to process raw materials from 10, 20 and 200 (periodic action) and 50 hectares (continuous action) of lavender plantations are offered. At the same time, a wide range of aromatic plants may be processed too.