Saving NT $30 billion annually – emulsifier for oily wastewater
年省300億-含油廢水乳化劑
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          Waste converted to energy is a global trend, and the industry is devoting more efforts to this direction. In addition to reducing the cost of waste disposal, it can bring down the cost of raw materials or fuels. For the earth, it can also mitigate the harm of environmental pollution and ease the problem of the fossil fuel energy crisis. NCKU environmental engineering chair professor Wen-chih Lee’s team mixed 84-89% heavy oil, 10-14% oily industrial wastewater and 1% emulsifier proportionally and then fed them into the homogeneous emulsifying equipment with super-high revolutions. The continuous emulsifying equipment was used to develop heavy oil emulsifying technology to meet the feasibility of future industry application

          In terms of energy efficiency testing, compared with 100% heavy oil used in seven chemical factories, it increased by 12.8-28.2%, with an average of approximately 18%. In addition, emulsified heavy fuel oil has made a significant contribution to pollutant emission reduction. Carbon dioxide emissions decreased by 14-28%, sulfur oxides by 15%, nitrogen oxides by 17%, granular pollutants by 36%, carbon monoxide by 84%, polycyclic aromatic hydrocarbons by 37%, and carcinogenic equivalents by 47% after conversion. According to the data, emulsified heavy fuel oil can not only improve energy efficiency and make combustion more complete, but also contribute significantly to pollutant reduction. Taiwan's industry spends NT$300 billion a year on heavy oil. If all industries switch to emulsified heavy fuel oil developed by NCKU, there will be 10% profit after deducting equipment costs, emulsifiers and other costs, which will save at least NT$30 billion a year. Upon calculation by a chemical plant, it decided, when building its third boiler, to adopt the emulsified heavy fuel oil invented by the NCKU team, which required about NT$500,000 for related equipment. In the past, heavy oil used to cost NT$5 million per month, and the use of emulsified heavy fuel oil could save NT$500,000 per month and NT$6 million per year reflecting a 10% energy saving basis. In addition, emulsified heavy fuel oil solves the problems of oily industrial wastewater treatment and discharge. After preliminary separation of oil from water from oily industrial wastewater, the remaining oily water can be directly used to produce emulsified heavy fuel oil without discharging industrial wastewater, saving a treatment fee of NT$6,000 to NT$10,000 per metric ton. Moreover, based on the carbon tax (or carbon trading price) of NT$400-800 per metric ton of carbon dioxide emissions, approximately NT$16.7-33.4 billion is required payment for burning heavy oil in Taiwan in one year, and NT$2.3-4.7 billion for a minimum reduction of 14% if emulsified heavy oil is used. The emulsified heavy fuel oil from oily wastewater has been put into production. It achieves the reliable, sustainable and modern energy described in SDG7, and also solves the most important price issue of alternative fuels if used in large quantities. From the final calculation, affordable energy is just around the corner!

          廢棄物轉能源為目前全球之趨勢,於工業界更是致力研究之方向,除降低處理廢棄物處理之費用外,亦可降低原料或燃料等成本;對地球而言更是降低環境污染等帶來之危害,亦舒緩化石能源危機之問題。成功大學環工系講座教授李文智研發團隊以84-89%重油、10-14%含油工業廢水、1%乳化劑比例均勻攪拌混合後送入具超高轉數之均質乳化設備,並利用連續式乳化設備進行重油乳化技術之研發,以符合將來實廠應用之可行性。

          於能源效率測試方面,經7間實際化學工廠與過去使用百分之百重油相比,平均提升了12.8-28.2%,平均約18%。除此之外,於污染物排放減量方面,乳化重油亦有重大貢獻。二氧化碳排放減少約14-28%,硫氧化物減少約15%,氮氧化物減少約17%,粒狀污染物減少約36%,一氧化碳減少約84%,多環芳香烴減少約37%,經換算後減少致癌當量約47%。從數據來看,乳化重油不但能提升能源使用效率使燃燒進行更完全外,於污染物減量亦有重大貢獻。全台灣工業界一年花三千億元買重油,若全改用成大研發的乳化重油,扣除設備費用、乳化劑等成本,還有十%的利潤,一年至少省三百億元。經一實際化學工廠計算,於建造其第三座鍋爐時,決定採用成大團隊所發明之乳化重油做為燃料,所需相關設備約五十萬元,但業者過去每月重油耗費五百萬元,以節能十%計算,採用乳化重油後每月可省五十萬元,一年節省六百萬元。此外乳化重油也解決了含油工業廢水處理、排放等問題。工廠的含油工業廢水,經初步油水分離,剩餘含油的水可直接用於製造乳化重油,工業廢水不必排放,省下每噸六千至一萬元的處理費。另外,以每排放1公噸二氧化碳之碳稅(或碳交易價格)以新台幣400-800元計算,台灣地區燃燒重油一年約需繳交167-334億,如從上述之數據,如以最低14%減量計算,即可有約23-47億之規模。含油廢水乳化重油已付諸於實廠,不但符合SDG7所述之可靠的、永續的以及現代的能源,如能大量利用,更可以解決替代燃料截至目前為止最重要之價格問題,從最後之計算來看,負擔的起的能源,指日可待!