本文選題：煉油廢水　切入點：工藝設計　出處：《山東大學》2015年碩士論文　論文類型：學位論文

【摘要】：煉油廢水是石油煉制過程中排放的含油廢水,具有排放量大,污染物成分復雜、濃度高,含大量有毒和難生物降解污染物等特點,直接排放會對環(huán)境造成極大危害。傳統(tǒng)煉油廢水處理工藝為“隔油-氣浮-生化”的老三套工藝,技術成熟、可靠,但對廢水處理效果有限,難以達到日益提高的排放標準。同時,單一的處理工藝很難達到國家和地方排放標準,多級組合處理工藝能根據(jù)各處理單元特點,發(fā)揮各處理單元優(yōu)勢而避免其局限性,達到較好的處理效果,正得到越來越多的工程實際應用。本廢水處理設計以東營某煉油廠廢水處理為實例,根據(jù)對項目水質(zhì)特征的分析,結(jié)合當?shù)刈匀粭l件、排放標準等因素,進行了工藝比選、設計參數(shù)和運行參數(shù)分析論證,確定了一套“隔油+渦凹氣浮+溶氣氣浮+MBBR+臭氧氧化+曝氣生物濾池+過濾+消毒”的組合工藝,并對工程進行了具體的構(gòu)筑物設計和設備選型。根據(jù)設計方案預期處理效果,該煉油廢水經(jīng)組合工藝處理后,pH為6-9,CODcr≤50 mg/L, BOD5≤10 mg/L, SS≤20 mg/L, NH4+-N5 mg/L,石油類≤3 mg/L,揮發(fā)酚≤0.2 mg/L,硫化物≤1.0 mg/L,總氰化物≤0.5 mg/L,色度小于30倍,出水水質(zhì)達到《山東省海河流域水污染物綜合排放標準》(DB37/675-2007)一級標準及2011年修改頁排放標準。根據(jù)設計方案,組合工藝對CODc,的預期去除率為97.5%,對SS的預期去除率為97.1%,對NH4+-N的預期去除率為92.8%,對石油類的預期去除率將達到99.4%。該組合工藝對煉油廢水預期處理效果較好,當水質(zhì)在一定的濃度范圍內(nèi)波動時,組合工藝具有較好的耐沖擊負荷能力,可穩(wěn)定運行,在煉油廢水處理中具有廣闊的工程應用前景。
[Abstract]:Refinery wastewater is a kind of oily wastewater discharged in the process of petroleum refining. It has the characteristics of large discharge, complex pollutant composition, high concentration, large amount of toxic and difficult biodegradable pollutants, etc. Direct discharge will cause great harm to the environment. The traditional refinery wastewater treatment process is the old three sets of "oil separation, air floatation and biochemistry" process. The technology is mature and reliable, but the effect on wastewater treatment is limited. At the same time, it is very difficult for a single treatment process to meet the national and local emission standards, and the multistage combined treatment process can take advantage of each treatment unit and avoid its limitations according to the characteristics of each treatment unit. The wastewater treatment design takes the wastewater treatment of a refinery in Dongying as an example, according to the analysis of the water quality characteristics of the project, combined with local natural conditions, discharge standards and other factors, Process comparison and selection, analysis and demonstration of design parameters and operation parameters are carried out, and a set of combined process "filtering and disinfection of MBBR ozone oxidation aerated biofilter" is determined. And the specific structure design and equipment selection are carried out. According to the design plan, the expected treatment effect, After being treated by the combined process, the pH of the wastewater is 6-9 BOD5 鈮，

本文編號：1599971