煤制甲醇煤氣洗滌污水全循環(huán)利用改造

第37卷,第期安徽化工Vol, 37. No. 1ANHUI CHEMICAL INDUSTRFeb, 2011煤制甲醇煤氣洗滌污水全循環(huán)利用改造鄭小軍,陳雪云(浙江巨化集團晉巨化工有限公司生產(chǎn)科,浙江衢州324004)摘要針對原洗滌水循環(huán)裝置存在的懸浮物難以沉降等問(wèn)題利用“微渦流”技術(shù)進(jìn)行改造增加關(guān)鍵設備“凈化器”一臺。投用后懸浮顆粒沉降效果較好,水質(zhì)達標,實(shí)現了洗滌水的全循環(huán),產(chǎn)生了良好的經(jīng)濟效益和環(huán)保效益。關(guān)鍵詞:懸浮物;微渦流;凈化器;循環(huán)利用;節能減排doi:03969n.1008-553X2011.01019中圖分類(lèi)號:TQ545文獻標識碼:A文章編號:1008-553X(2011)01-0068-02浙江晉巨化工有限公司是一家煤化工企業(yè),年產(chǎn)甲循環(huán)要求醇12萬(wàn)噸,其利用無(wú)煙煤為原料制取水煤氣再利用煤添加了絮凝劑的循環(huán)水從凈化器底部進(jìn)入混合區,氣合成甲醇。水煤氣中含有一定量的粉塵焦油等一系混合區采用水平放置的木格柵分為若干小混合區,廢水列的物理雜質(zhì),經(jīng)測定,煤氣中固態(tài)雜質(zhì)的含量達到流經(jīng)格柵之間的孔隙時(shí)形成無(wú)數細小渦流微渦旋流0625Kg/h這些雜質(zhì)在進(jìn)入水煤氣脫硫塔以及電除塵器動(dòng)能有效地促進(jìn)水中微粒的擴散與碰撞。一方面混凝之前必須采用一定的物理方法加以去除傳統上主要采劑水解形成膠體在微渦流作用下快速擴散并與水中膠用新鮮水洗滌的方法煤氣和洗滌水在洗滌塔中逆流接體充分碰撞使水中膠體快速脫穩;另一方面,水中脫穩觸,以達到降溫、除塵的目的。膠體在微渦流作用下具有更多的碰撞機會(huì )因而具有更洗滌塔原使用一次新鮮水,由此帶來(lái)了二個(gè)問(wèn)題:高的凝聚效率。絮凝劑不斷吸附廢水中的雜質(zhì)和懸?、偎肯母?。每小時(shí)需消耗150m3的新鮮水;②排放物逐漸形成大顆粒物質(zhì)進(jìn)入緩沖區緩沖區的主要目水中含有較高濃度的 COD. NH-N、氰根以及SS等污的是降低流速,并使絮體進(jìn)一步增大;出緩沖區后進(jìn)入染物,其中COD濃度為100-200mg/L,氨氮為澄清區澄清區的上部設置有斜管沉淀區,利用傾斜的20-100mg,氰根為10-30mgL,s為50-10ng,成平行管分割成一系列淺層沉淀層,利用層流原理使絮體為公司的一個(gè)重要污染點(diǎn)源,增加了公司的環(huán)保壓力。和雜質(zhì)沉降下來(lái)澄清區的底部為錐形,廢水中的絮體針對以上問(wèn)題,公司于2006年實(shí)施了洗滌水循環(huán)利用和雜質(zhì)等沉降至澄清區的底部經(jīng)排泥管排出,上清液改造項目,但由于采用技術(shù)過(guò)于簡(jiǎn)單,水質(zhì)凈化達不到經(jīng)位于澄清區上端的出水管流出,經(jīng)涼水塔降溫后循環(huán)目標(水中懸浮物超標),關(guān)鍵原因在于水中的懸浮物顆使用。系統T藝流程見(jiàn)圖1。粒粒徑太小,且大部分屬于膠體顆粒,粒徑在103流程描述:將洗滌塔洗滌后的廢水引入沉降池內進(jìn)10mm之間,其自然沉降速度只有0.154×10ms,在行重力沉降,通過(guò)泵加壓后一部分直送涼水塔;另一部水中不易沉降叫,即使添加了絮凝劑,也無(wú)法在短時(shí)間內分與加藥裝置出口聯(lián)通一并送往凈化器(新增),經(jīng)凈化沉降下來(lái)因而造成循環(huán)水系統工況惡化,水質(zhì)極差,無(wú)器過(guò)濾后的清水流入沉降池然后用泵送入循環(huán)水冷卻法實(shí)現裝置的穩定長(cháng)周期運行,達不到全循環(huán)的目的,塔降溫冷卻后,再用泵加壓送洗滌塔進(jìn)行循環(huán)使用。故試運行一個(gè)月即停下該裝置。凈化器中的沉淀物排入污泥晾水池(新建)待污水隨著(zhù)節能減排要求的逐步提高,為減少污水排放,池中水質(zhì)變清后由污水泵(新建)打入沉降池污泥由公司決定重啟本項目。在項目啟動(dòng)前期針對現有裝置污泥池收集后,作為廢渣集中處理的缺陷,經(jīng)過(guò)技術(shù)調研,決定在現有流程的沉降池后增實(shí)際運行效果:2010年8月2日該項目建成試加一臺處理能力為50mh的凈化器,利用“微渦流”的行,以?xún)艋鞒隹趹腋∥锖孔鳛樵u定指標,指標定原理提高懸浮物的沉淀過(guò)濾效果最終使洗滌水達到全為≤100mgm3,至今已運行40天。從運行情況看,循環(huán)收稿日期:201009-27作者簡(jiǎn)介:鄭小車(chē)(1974-),男,199年畢業(yè)于杭州化工學(xué)校助理T程師目前從事化工污水治理工作,13454003,mhl0571@63c鄭小軍,等:煤制甲醇煤氣洗滌污水全循環(huán)利用改造凈化器涼水塔降池加藥裝置洗滌塔圖1系統工藝流程圖水水質(zhì)較之前有極大改善懸浮物含量有所波動(dòng),經(jīng)調萬(wàn)噸減排COD130噸、氨氮75噸,產(chǎn)生了良好的經(jīng)濟整加藥量后基本穩定在80mg/m3以下,達到了預期目效益與社會(huì )效益。標,實(shí)現了全循環(huán)的目的。經(jīng)測算,每年可節約水量120Innovation upon the Recycling of Methanol Coal Gas Cleaning the SewageZHENG Xiao-jun, CHEN Xue-yun(Zhejiang Jinju Chemical Co, Ltd, Juhua Group, Quzhou 324004, China)Abstract: Regarding the problem that suspended matters in the existing water-washing device are difficult to fall, it canbe resolved by adding a key equipment of purifier and using techonological innovation of "micro eddy currenttorenovate the existing one. After the innovation, the effect of aerosol particles sedimentation is good and water qualityaches its standard. This innovation not only realizes the full circulation of washing water, but also yields godand environmental benefitsKey words: suspended matter; micro eddy current; purifier; recycling; energy saving and emission reduction會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )朵會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )公公公會(huì )公會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )公公會(huì )公會(huì )公會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )眾會(huì )朵會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )會(huì )(上接第47頁(yè))Synthesis of the Matrine acety salicylateFU Li, LIU Jing, HE Li-qin, WANG Xiao-shan, HONG Mei,, BI Yu2(1. Anhui College of Traditional Chinese Medicine; Anhui Key Laboratory of Modernized ChineseMaterical Medical, Hefei 230031, China; 2. Dep of Drug, PLA 532 Hospital, Huangshan 245000, China)Abstract: Objective: To synthesize matrine acetylsalicylate and optimize the technical process. Methods: Matrineacetylsalicylate was synthesized from matrine and acetylsalicylic acid. Results: The yield of smatrine acetylsalicylate wasover 89%. Chemical structure of the product was confirmed by IR. Conclusions This synthetic technique is simple andfeasiableKey words: Matrine; acetylsalicylic acid; structure modification