CAJ | 학술논문

面对日趋紧张的能源和环境问题,充分开发利用可再生能源及工业余热成为缓解能源危机的重要途径.本文针对化工领域精馏过程中排放的大量余热问题,设计低温发电系统接入原精馏设备中以替代原系统中的冷凝器,利用精馏塔中产品的蒸气热实施发电试验.文中还以此技术的全年运行分析,确定了乙醇-异丙醇化工精馏工艺排放余热的节能效益,表明在夏季最不利工况(冷凝温度为37.5℃)下运行时,理论发电效率约为8.7%,实际发电效率约为2.5%;在冬季最有利条件(冷凝温度为20.9℃)下运行时,理论发电效率约为11.3%,实际发电效率约为5.5%;年均理论发电效率约为10.2%,实际发电效率约为4.2%.
면대일추긴장적능원화배경문제,충분개발이용가재생능원급공업여열성위완해능원위궤적중요도경.본문침대화공영역정류과정중배방적대량여열문제,설계저온발전계통접입원정류설비중이체대원계통중적냉응기,이용정류탑중산품적증기열실시발전시험.문중환이차기술적전년운행분석,학정료을순-이병순화공정류공예배방여열적절능효익,표명재하계최불리공황(냉응온도위37.5℃)하운행시,이론발전효솔약위8.7%,실제발전효솔약위2.5%;재동계최유리조건(냉응온도위20.9℃)하운행시,이론발전효솔약위11.3%,실제발전효솔약위5.5%;년균이론발전효솔약위10.2%,실제발전효솔약위4.2%.
As the energy and environment problems are getting intense,it is important to make full use of renewable energy and industrial waste heat. This paper presented a project aiming at recycle and reuses the disposal waste heat in the chemical sector of distillation process. The low-temperature cogeneration technology was utilized to replace the cooling unit of the original system and recover the low-temperature stream waste heat generated in distillation column. The operational conditions at different temperatures were discussed and analyzed. The energy-saving benefit of the waste heat generated in the ethanol-isopropanol distillation process was also considered. The results showed that theoretical generation efficiency and actual generation efficiency were 8.7% and 2.5%,respectively under the most unfavorable conditions in summer (the condensing temperature is 37.5 ℃),and the values were 11.3% and 5.5%,respectively under the most favorable conditions in winter (the condensing temperature is 20.9 ℃). The annual average theoretical generation efficiency was 10.2%, the actual value was about 4.2%.