頁籤選單縮合
題名 | Energy Cost Reduction via Improving Fuel Distribution in an Integrated Steel Works |
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作者 | 黃大松; 歐正章; | 書刊名 | 能源季刊 |
卷期 | 33:3 2003.07[民92.07] |
頁次 | 頁129-144 |
分類號 | 454.89 |
關鍵詞 | 煉焦爐氣移撥; 燃料重分配; 天然氣混氮氣燃氣系統; COG shifting; Fuel distribution; NG/N[feaf]fuel gas system; |
語文 | 英文(English) |
中文摘要 | 中鋼公司煉焦爐氣(CGO)與低硫燃硫料油(LSO)有著密切替代關係,當COG不足時,係以LSO補注之。以往鍋爐留用較多COG以供彈性調度,造成加熱爐需要補注大量LSO。經分析90年4月份鍋爐COG耗用資料後,發現約有10000Nm3.hr COG可自鍋爐移給加熱盧。經1年多來實際調度後,BFG/LDG燃氣排放率由0.38%幾乎降至零、加熱爐燃耗率降低5.1%、每噸鋼胚平均LSO耗用量約降低6公升,顯示此燃料調度已產生正面之效果。 中鋼公司鍋爐燃用自產燃氣、外購燃油及燃煤來發電,是否投入外購燃料端視外購電價何及購電超常量而定,此可藉建立燃控模式來作為操控依循。COG移撥至加熱爐後,LSO燃控更形重要。本文從燃油發電熱效率、電價、購電契學量、超約預估值、鍋爐產汽量、COG及LSO用量等資料蒐集著手,根據超約狀況及燃油發電成本,指引鍋爐正確進/退油時機,進一步控管外購能源成本。 此外,並已規劃NG/N2混合燃氣當COG之輔助燃料,未來完工後,可將NG/N2混合燃氣即時注入COG短暫缺口,隡低爐子進/退油之頻率與時間,使能源調度與管理系統更臻完全與穩定。 |
英文摘要 | In China Steel corporation (CSC), LSO (Low Sulfur Oil) is a substitute fuel of CGO (Coke Oven Gas), one of the self-produced gases. When COG is in stortage, LSO will be injected to the reheating furnaces or power plant boilers instead. For safety, it is recommended that more COG should be reserved in the boilers previously. Under this condition, the furnaces consume relatively more LSO. Though the analysis of data collected in April of 2001, it was found that about 10,000 Nm3/H COG could be shifted from boilers to furnaces. Aft4er COG shifting it indicated that self-produced BFG/LDG gas flare percentage was reduced of 0.38% to nearly 0%, the fuel consumption of No.1 HSM (Hot Strip Mill) reheating furnaces was decreased by 5.1%, and the LSO comsumption rate per ton crude steel was lowered by 6liters. Therefore, the energy cost of the company was reduced. The boilers burn gases (self-produced) and LSO/COAL (purchased) to generate electricity in CSC. After COG shifting, LSO and COAL became more important fuels for the boilers. Based on the analysis of self-generated electricity cost, purchased electricity price, demand set, predict-over, boiler steam production, and COG/LSO consumption rate, the management guidelines were established. An analysis program was written the and the principle of energy management was subsequently set up. The energy management system could decide the proper time when LSO should be burned according to self-generated electricity cost, purchased electricity price, and predict-over during various semi-peak/off-peak load time of electricity. The management of LSO in peak load time and COAL in off-peak load time of electricity will be the next research topic in order to further improve the performance of the analysis program. In the near future, the NG/N2 mixing gas will be injected into the COG piping system to act as supplementary fuel especially when COG is in unexpected and abrupt shortage. Overall, the energy distribution system in CSC was progressing into more positive and stable function. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。