煉油廢水深度處理工藝設計與運行調試
發(fā)布時間：2018-07-20 19:34
【摘要】：隨著社會的發(fā)展和人民生活水平的不斷提高,對水資源的需求量也在日益增加。水資源的嚴重短缺和水污染問題已成為我國經(jīng)濟建設和社會發(fā)展的制約因素。污水回用是緩解我國水資源緊缺的重要途徑之一。煉油加工企業(yè)是用水大戶,也是排污大戶,設備循環(huán)冷卻水占企業(yè)總用水量的90%以上,對于原油加工量為500萬噸／年的煉油企業(yè)來說,循環(huán)冷卻水系統(tǒng)補水量每天可達3600m3,因此將污水回用于循環(huán)冷卻水系統(tǒng)補水,節(jié)水潛力是巨大的。河北某煉油企業(yè),,目前生產(chǎn)過程中產(chǎn)生的廢水主要分為含鹽廢水和含油廢水,兩種廢水經(jīng)分質處理達到《污水綜合排放標準》GB8978-1996二級標準和《河北省氯化物排放標準》(DB13/831-2006)三級標準。為了降低水資源消耗,提高污水回用率,決定對經(jīng)二級處理的含油廢水經(jīng)深度處理后回用于循環(huán)冷卻水系統(tǒng)和廠區(qū)綠化。本文針對河北某煉油企業(yè)含油廢水二級出水水質特點,通過多方案技術經(jīng)濟比較,將“內(nèi)循環(huán)曝氣生物濾池+高密度澄清池+流砂過濾”組合新工藝成功應用于煉油廢水深度處理與回用工程實踐中。按照國家相關的設計規(guī)范及標準要求,完成了該工程的工藝設計和運行調試。工程實踐結果表明：含油廢水二級出水經(jīng)以上深度處理后COD、石油類、SS、NH3-N和總硬度去除率分別達到52%、87%、84%、91%和46%。工程投運后,運行狀態(tài)平穩(wěn),出水水質達到了《煉化企業(yè)節(jié)水減排考核指標與回用水質控制指標》QSH0104-2007的標準要求。該工程設計規(guī)模10800m3/d,工程總投資1508.69萬元,噸水處理成本為0.83元。該工程的成功實施,使企業(yè)污水回用率由原來的20%提高到了70%,同時大大減少了企業(yè)污水的排放量,合理保護了地下水資源和周邊環(huán)境。具有良好的社會效益、環(huán)境效益和經(jīng)濟效益。
[Abstract]:With the development of society and the improvement of people's living standard, the demand for water resources is increasing day by day. The serious shortage of water resources and water pollution have become the restrictive factors of economic construction and social development in China. Wastewater reuse is one of the important ways to alleviate the shortage of water resources in China. Oil refining and processing enterprises are big users of water and sewage. Equipment circulating cooling water accounts for more than 90% of the total water consumption of the enterprises. For oil refining enterprises with crude oil processing capacity of 5 million tons per year, The rehydration capacity of circulating cooling water system can reach 3600m3 per day, so the water saving potential of reusing wastewater in circulating cooling water system is great. The wastewater produced in the present production process in a refinery in Hebei Province is mainly divided into salt containing wastewater and oil containing wastewater. The two kinds of wastewater are treated by different quality to meet the second class standard of GB8978-1996 and the standard of chloride discharge of Hebei Province (DB13 / 831-2006). In order to reduce the consumption of water resources and increase the rate of wastewater reuse, it is decided to reuse the oil-bearing wastewater after advanced treatment in the circulating cooling water system and the plant area for greening. According to the characteristics of secondary effluent quality of oil-bearing wastewater from an oil refinery in Hebei Province, the technical and economic comparison of multiple schemes is carried out in this paper. The new combined process of "internal circulating biological aerated filter (BFAF) with high density clarifier flow sand filtration" has been successfully applied to the advanced treatment and reuse of refinery wastewater. The process design and commissioning of the project have been completed according to the relevant national design specifications and standards. The results of engineering practice show that after advanced treatment of COD, the removal rates of NH3-N and total hardness of the secondary effluent from oily wastewater are 5220.87% and 46.1% respectively. After the project was put into operation, the running condition was stable, and the effluent quality reached the standard requirement of "water saving and emission reduction assessment index and reuse water quality control index" QSH0104-2007. The design scale of the project is 10800 m3 / d, the total investment of the project is 15.0869 million yuan, and the cost of water treatment is 0.83 yuan per ton. With the successful implementation of the project, the reuse rate of enterprise sewage has been raised from 20% to 70%, and the discharge of sewage has been greatly reduced, and the groundwater resources and the surrounding environment have been reasonably protected. It has good social, environmental and economic benefits.
【學位授予單位】：河北科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X742
本文編號：2134545
[Abstract]:With the development of society and the improvement of people's living standard, the demand for water resources is increasing day by day. The serious shortage of water resources and water pollution have become the restrictive factors of economic construction and social development in China. Wastewater reuse is one of the important ways to alleviate the shortage of water resources in China. Oil refining and processing enterprises are big users of water and sewage. Equipment circulating cooling water accounts for more than 90% of the total water consumption of the enterprises. For oil refining enterprises with crude oil processing capacity of 5 million tons per year, The rehydration capacity of circulating cooling water system can reach 3600m3 per day, so the water saving potential of reusing wastewater in circulating cooling water system is great. The wastewater produced in the present production process in a refinery in Hebei Province is mainly divided into salt containing wastewater and oil containing wastewater. The two kinds of wastewater are treated by different quality to meet the second class standard of GB8978-1996 and the standard of chloride discharge of Hebei Province (DB13 / 831-2006). In order to reduce the consumption of water resources and increase the rate of wastewater reuse, it is decided to reuse the oil-bearing wastewater after advanced treatment in the circulating cooling water system and the plant area for greening. According to the characteristics of secondary effluent quality of oil-bearing wastewater from an oil refinery in Hebei Province, the technical and economic comparison of multiple schemes is carried out in this paper. The new combined process of "internal circulating biological aerated filter (BFAF) with high density clarifier flow sand filtration" has been successfully applied to the advanced treatment and reuse of refinery wastewater. The process design and commissioning of the project have been completed according to the relevant national design specifications and standards. The results of engineering practice show that after advanced treatment of COD, the removal rates of NH3-N and total hardness of the secondary effluent from oily wastewater are 5220.87% and 46.1% respectively. After the project was put into operation, the running condition was stable, and the effluent quality reached the standard requirement of "water saving and emission reduction assessment index and reuse water quality control index" QSH0104-2007. The design scale of the project is 10800 m3 / d, the total investment of the project is 15.0869 million yuan, and the cost of water treatment is 0.83 yuan per ton. With the successful implementation of the project, the reuse rate of enterprise sewage has been raised from 20% to 70%, and the discharge of sewage has been greatly reduced, and the groundwater resources and the surrounding environment have been reasonably protected. It has good social, environmental and economic benefits.
【學位授予單位】：河北科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X742
【共引文獻】
相關碩士學位論文 前2條
1 顧飛宇;生化制藥廢水處理工程技改及效果研究[D];武漢工程大學;2013年
2 陸艷俠;曝氣生物濾池前置反硝化工藝性能研究[D];安徽建筑大學;2014年
，本文編號：2134545
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