농촌폐비닐과 하수슬러지를 혼합한 재생에너지 생산 시스템 및 난방열 공급시스템 개발 Development of Greenhouse Heating System & Renewable Energy Production System Using Waste Vinyl and Sewage Sludge원문보기
보고서 정보
주관연구기관
(주)리젠코리아
보고서유형
최종보고서
발행국가
대한민국
언어
한국어
발행년월
2008-06
주관부처
농림축산식품부 Ministry of Agriculture, Food and Rural Affairs(MAFRA)
Ⅳ. Summary and Conclusions 1. Investigation of characteristics of waste vinyl and sewage sludge To analyze the components and heating values of materials, waste vinyl and sewage sludge were sampled from 7 waste vinyl collection plants and 5 sewage treatment plants. The results are summarized a
Ⅳ. Summary and Conclusions 1. Investigation of characteristics of waste vinyl and sewage sludge To analyze the components and heating values of materials, waste vinyl and sewage sludge were sampled from 7 waste vinyl collection plants and 5 sewage treatment plants. The results are summarized as followings: 1) About 323,000 tons’ waste vinyl from agricultural production was generated during 2005 showing increase every year. About 2,560,000 tons’ sewage sludge was generated during 2005, most of which was discharged into the ocean. 2) Low heating values (LHV) of waste vinyl were from 7,329 to 9,584 kcal/kg showing the mean of 8,291 kcal/kg. Low heating values of sewage sludge from three plants were below zero which means that those sludge need heat to burn out. However, if they are dried to MC of 10%, they could be used as fuel sources. Low heating values of sewage sludge, when dried to MC of 10%, were from 1,723% to 3,246% with the mean of 1,998 kcal/kg. 3) Moisture content of waste vinyl varied from 0.02% to 2.80% representing small difference possibly due to weather condition of sampling date. Combustible content varied from 58.3% to 92.5% showing much difference. Moisture content of sewage sludge varied from 70.1% to 84.3% according to regions. Sewage sludge needs dewatering and drying process to reduce moisture content to about 10% for RDF formation. 4) Heavy metal component of the RDF should not exceed the permit limit to prevent air and soil pollution after burning. From the quality standard of RDF of our country, contents of Hg, Cd, Pb and As are specified not to exceed limit values such as Hg; 1.20 mg/kg, Cd; 9.0 mg/kg, Pb; 200.0 mg/kg, and As; 13.0 mg/kg. Heavy metal components, Pb, Cu, As, Hg, Cd, Cr6+,CN and Oil, of waste vinyl were less than the limit showing the usability of waste vinyl for raw materials of RDF. Heavy metal components of sewage sludge were less than permit limit showing the usability of sewage for RDF materials. 2. Development of pre-treatment system for producing RDF Essential prerequisite to utilizes object and produces solid fuel is reduction of percentage of moisture content. Existing technology for this is selecting most physical compression method (belt press hydroextractor etc.) or physical original decision separation method (Deccan other back). But, I hard to debase percentage of moisture content of object less than 80% by this technology and it is real condition that bottleneck problem is happening even if there is in application of a dry technology since dehydration because there is no big change in years of object. In this subject, could completed development of a high effectiveness dehydration technology that do to reduce percentage of moisture content less than 60% because cell membrane of object takes advantage of tearing principle by function by flowing of electron (e-) because is infiltrated juice to object, and secure dehydration efficiency and electricity safety by taking advantage of technique of three-phase alternating current specially. 3. Development of RDF forming machine In this study, I molded raw material (sludge, other combustible refuse) that pretreatment finishes by solid fuel that have heating need caloric value mixing fixed at the rate of as is uniform. 4. Development of boiler for plastic film house In this study, wished to develop a technology that caloric value promises efficiency of caloric value control or fuel correction of deformities adding high polymer organic sex deadly wastes (waste vinyl) to object that dry and dehydrate, and presented a mixing young technology in 'Solid fuel burning exclusive use circulation boiler' to be included in "Use technology of solid fuel (GR sludge bunker coal)" development extent. 5. Analysis of the boiler performance This study was performed to analyze performance of boiler by heating the plastic film house for rose cultivation. Inlet and outlet temperatures of boiler and water flow were measured to get boiler efficiency. Eight thermocouple temperature sensors was installed to find out temperature variation with time and spaces in the plastic film house. Exhaust gas was analyzed using the gas analyzer(GreenLine MK2). The results are as followings: 1) Proximate analysis of waste plastic film, sewage sludge and RDF was accomplished. Heating value of RDF was 9,782 kcal/kg with 0.43% of the moisture content, 10.73% of ash and 88.84% of combustible content representing good condition as a solid fuel. 2) Boiler efficiency was acquired by input and output heat energy. The temperature of exit water from boiler was varied in the range of 40∼50℃. Efficiency of boiler was 3.6% because the boiler was not operated normally. The air line of the combustion chamber was closed by melting of the fuel and did not supply the air into the fuel. 3) CO, CO2, SO2 and NOx gas of exhaust line was measured using the gas analyzer. Exhaust gas concentration was below permit limit for the RDF combustion in the boiler. 4) Temperature variation according to horizontal position and vertical height was within 1℃ and the temperature was decreased with time because the boiler did not operate properly and the outer air temperature was decreased. 5) Bottom ash of the boiler contained the 0.09% of moisture content, 0.84% of ash and 99.07% of combustible content because the RDF was not burned enough in the combustion chamber.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.