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山東東明石化集團(tuán)有限公司污水處理技術(shù)改造方案的研究(已修改)

2024-11-19 17:35 本頁面
 

【正文】 山東大學(xué) 碩士學(xué)位論文 山東東明石化集團(tuán)有限公司污水處理技術(shù)改造方案的研究 姓名:鄭建偉 申請學(xué)位級別:碩士 專業(yè):環(huán)境工程 指導(dǎo)教師:劉汝濤 。郝忠臣 20202027 山東大學(xué)碩士學(xué)位論文 摘要 隨著國民經(jīng)濟(jì)的不斷發(fā)展,工業(yè)、農(nóng)業(yè)及生活用水對水資源的需求越來越大, 保護(hù)有限水資源,節(jié)約用水刻不容緩;隨著科學(xué)技術(shù)的發(fā)展,石化污水處理技術(shù)在 不斷發(fā)展、創(chuàng)新。 2020 年國家環(huán)保政策緊縮,山東省地方標(biāo)準(zhǔn) (DB37/ 599— 2020) 更是以國標(biāo)一級 A 為基礎(chǔ)提出了更高的要求。在以上述背景下,地屬 “ 南水北調(diào) ” 工程東線沿線排污單位之一的山東東明石化集團(tuán)改造其現(xiàn)有污水處理工藝,提高污 水處理效果,加大中水回用的比例有著義不容辭的責(zé)任和義務(wù)。近年來,東明石化 集團(tuán)加大環(huán)保投入力度,取得了良好的經(jīng)濟(jì)效益和環(huán)境效益。 本文以東明石化集團(tuán)有限公司污水處理廠的污水處理技術(shù)改造工程為研究對 象,參考了國內(nèi)外近年來大量石化廢水處理工程的實(shí)例和新技術(shù)的應(yīng)用,本著充分 利 用現(xiàn)有污水處理設(shè)施,綜合考慮,因地制宜的原則,分析了技改前山東東明石化 污水處理廠排水 CODcr、氨氮不達(dá)標(biāo)的原因,并對工序中浮選段、生化段存在問題 及原因進(jìn)行了深入具體的分析,其中著重提出了對生化段工藝進(jìn)行了優(yōu)化和改造措 施,為石化行業(yè)的污水處理技術(shù)的研究提供了一定的素材和經(jīng)驗(yàn)。本次技術(shù)改造是 一次成功的改造工程,通過本次改造工程,使東明石化集團(tuán)的外排水穩(wěn)定達(dá)到了《山 東省南水北調(diào)沿線水污染綜合排放標(biāo)準(zhǔn)》。通過本次污水處理技術(shù)改造東明石化集團(tuán) 的污水處理能力大大提高,以外排水的關(guān)鍵污染物為例:技改前, CODcr 的指標(biāo)均 在 120 mg/ L 以上,氨氮在 40 mg/ L 以上;技改實(shí)施后,外排水的 CODcr 指標(biāo)逐步 降到 40 mg/ L 以下,氨氮的指標(biāo)逐步降到 1 mg/ L 以下。另外,通過對2020 年 2 月 19 日 ’3 月 25 日外排水 COD、氨氮與允許排放標(biāo)準(zhǔn)比較,技改后外排水中的 COD 和氨氮指標(biāo)均小于《山東省南水北調(diào)沿線水污染綜合排放標(biāo)準(zhǔn)》的規(guī)定值。由此可 見,本次技改工程效果是良好的,工藝的選擇是正確的。通過本次技術(shù)改造,效果 還是相當(dāng)明顯的,為實(shí)現(xiàn)污水資源化,提高企業(yè)的經(jīng)濟(jì)效益和社會(huì)效益打下了良好 的基礎(chǔ)。 本次技術(shù)改造歷時(shí) 1 年有余,增建了酸性水汽提裝置,徹底廢除了原有的處理 工藝,采用了大量石化污水處理的新技術(shù)、新工藝,如:將原 A/ 02 工藝改為雙 H 0 工藝,增建上向流曝氣生物濾池,進(jìn)一步去除二級生化出水 COD、氨氮,保障外排 山東大學(xué)碩士學(xué)位論文 水達(dá)標(biāo);將缺氧池改為兩級水解酸化池;改平流式布水為升流式;對曝氣池活性污 泥合理生物增效,提高菌群適應(yīng)能力和抗沖擊負(fù)荷能力;在推流曝氣池投加某公司 生物制劑,投加前將二級老化污泥排掉 1/ 3,投加過程中,控制推流曝氣池 DO 到合 適濃度;控制微生物 C: N: P 營養(yǎng)比。增加了污水的深度處理工藝段:生物活性炭 處理法。通過這些舉措,從根本上解決了原污水處理廠處理來水能力不足,處理深 度不夠的問題。 本次改造是符合時(shí)代發(fā)展潮流,符合黨中央提出建立和諧社會(huì)發(fā)展的要求,符 合企業(yè)發(fā)展需要,具有一定拓展意義的技術(shù)改造。本次技術(shù)改造為東明石化集團(tuán)有 限公司帶來一定的經(jīng)濟(jì)效益,僅酸性水氣提裝置一項(xiàng)就實(shí)現(xiàn)了:每小時(shí)生產(chǎn) 59. 6 噸 凈化水、 0. 38 噸酸性氣及 1. 79 噸工業(yè)氨水, 年回收硫磺 2 萬噸;另外,通過本次 改造,實(shí)現(xiàn)了部分企業(yè)污水資源化,每小時(shí)處理污水 200 噸,這些污水大約30%用 于綠化和沖洗用水,其余達(dá)標(biāo)排放。同時(shí),本次技術(shù)改造也為東明石化帶來了巨大 的環(huán)境效益,如: 2020 年 1 至 6 月份,集團(tuán)公司外排廢水 116. 8 萬噸,與去年同期 相比略有減少; COD 排放量 4l84 噸,比去年同期減排 162 噸,污水治理工作取得 顯著成效。 目前,東明石化準(zhǔn)備上馬膜法污水處理工程,準(zhǔn)備對處理過的污水進(jìn)一步處理 后用于生產(chǎn)循環(huán)水。因此,可見通過本次技術(shù)改造,為企業(yè)的實(shí)現(xiàn)零排放打下了良 好的基礎(chǔ)。本人認(rèn)為該公司的這次污水技術(shù)改造對石化污水處理行業(yè)在新技術(shù)、新 工藝應(yīng)用方面有著一定的實(shí)踐意義。 關(guān)鍵詞:石化污水,污水處理,中水回用,曝氣生物濾池 4 山東大學(xué)碩士學(xué)位論文 Abstract With the development of the national economy,the demand of water in industry, agriculture and daily life is increasing. It brooks no delay tO protect our limited water resources and save water. Witll the development of science and technology,the wastewater treatment technology is also developed and innovated. The national environment policy was deflation in 2020 and a higher requirement was put forward in local standard of Shandong province(DB37/ 599— 2020)based on the strictest requirements of the national standard. Shandong Dongming Petrochemical Group— one of the pollutant discharging units along the East— Route of SouthtoNorth Water Transfer Project, has the unshirkable responsibility and obligation in transforming the existing wastewater treatment technology,improving the wastewater— treatment efficiency and enhancing resusing proportion of reclaimed water under the background above. The group has achieved good economic and environmental benefits by increasing the investment in environmental protection. The reconstruction project of wastewater treatment technology of Shandong Dongming Petrochem Group is studied in this paper. Numerous examples of petrochemical wastewater treatment and the application of new technology at home and abroad were referenced. The reason that the CODcr and ammonia nitrogen is not meet the standard before the transformation of technology is analyzed based on the principle of sufficient utilization of the existing facilities, prehensive consideration and adaptation to local conditions. The, problems and its reasons existing in the flotation section and the biochemical section is analyzed deeply. Particularly,some optimizing and transforming measures of technology of biochemical section are carried out. So the thesis provides some source materials and experience for technological’development of wastewater disposal in the petrochemical industry. The reconstruction project is a successful project and it improved the wastewater disposal ability of Shandong Dongming Petrochem Group and made its discharged water meet the standard of Comprehensive Discharge Standard along Shandong South— toNorth Water Tran. sfer 山東大學(xué)碩士學(xué)位論文 Project. Take the main pollutants in discharge water as example。 before the technical transformation, the indexes of CODcr and ammoniac nitrogen are respectively over 1 20mg/ L and 40mg/ L; but after the transformation, they are respectively under 40mg/ L and t mg/ L. Moreover,the result of the detection of COD and ammoniac nitrogen in discharge water during Feb. 1 9 to Mar. 25, 2020 also shows that the indexes of COD and ammoniac nitrogen in discharge water after transformation are under the specified value of Comprehensive Discharge Standard along Shandong SouthtoNorth Water Transfer Project. Therefore the transformation is a successful one with good effect and right processes. The transformation also lays a good foundation for the the recycling of wastewater and the increase of the group’S economical and social benefits. The innovation lasted for more than one year with the old disposal processes pletely abolished and sour water stripping units constructed. A lot of new technology and new processes in petrochemical wastewater treatment were also introduced. They are; 1)replacing the original A/ 02 process with double HO process; 2)newly constructed up— flow biological aerated filter; 3)removing COD and ammoniac nitrogen in secondary biochemical effluent in order tO standardize the discharge water; 4)changing the anoxic pond— into tWO— state hydrolysis— acidification pool; changing the horizontal— flow water dis
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