【正文】 河南城建學(xué)院畢業(yè)設(shè)計(jì) 草漿造紙中段廢水綜合處理初步設(shè)計(jì) I 草漿造紙中段廢水綜合處理初步設(shè)計(jì) 摘 要 制漿造紙中段廢水主要包括 :蒸煮污冷凝水、紙漿洗篩凈化廢水、漂白廢水、堿回收廢水及部分泄漏黑液；中段廢水具有排放量大 ,污染負(fù)荷高 ,成分復(fù)雜 ,毒性大等特點(diǎn)； 草 漿造紙中段廢水中主要污染物為植物纖維 ,污染物濃度高 ,而 N、 P 含量偏低 ,可生化性很差 ,BOD5/COD 值一般約為 ～ , 易產(chǎn)生泡沫 , 處理難度大；因此 ,草制漿造紙中段廢水的處理已普遍受到政府和企業(yè)部門的高度重視。 本設(shè)計(jì)是 10萬(wàn)噸 /d 草漿造紙中段廢水綜合處理初步設(shè)計(jì)。 進(jìn)水水質(zhì)為 pH=4～9,COD≤ 3000mg/L,BOD5≤ 300～ 50 mg/L 0,ρ (SS)≤ 850mg/L, AOX≤ 20, 色度 ≤1000times。 2021 年 5 月 1 日實(shí)行新標(biāo)準(zhǔn) 造紙工業(yè)水污染物排放標(biāo)準(zhǔn)（ GB3544－2021）規(guī)定 pH=6～ 9， COD≤ 80mg/L， BOD5≤ 20mg/L， ρ (SS)≤ 30mg/L, AOX≤ 12，色度 ≤ 50times。這就使造紙廢水“達(dá)標(biāo)排放”迫在眉睫。 采用物化 預(yù)處理 +生化處理 +物化深度處理 的方法處理 該 中段廢水 可使出水達(dá)標(biāo)。 通過(guò)分析原水水質(zhì)水量，比較各處理工藝特點(diǎn)，本設(shè)計(jì)選用水解酸化 +carrousel 氧化溝 +混凝沉淀三級(jí)處理工藝處理草漿造紙中段廢水，可是出水排放達(dá)標(biāo)。 關(guān)鍵詞： 草漿造紙，中段廢水， carrousel 氧化溝，綜合處理 河南城建學(xué)院畢業(yè)設(shè)計(jì) Abstract II Abstract Pulp papermaking wastewater: steaming pollution condensate pulp wash sieve purification of wastewater, bleaching effluent, recovery waste water, and some leakage of black liquor。 middle of wastewater emissions, the pollution load, plex position, toxicity 。 major pollutants in the straw and paper in the middle of the wastewater plant fiber, high concentrations of pollutants, while the Nlow P content, biodegradability is poor, the ratio of BOD5/COD value is generally about to , easy to produce foam processing difficult。 straw pulp papermaking wastewater treatment has been generally well received by the government and corporate departments attach great importance. The design is the preliminary design of the integrated treatment of 100000 t / d straw of Paper Mill Wastewater. Water quality for pH = 4~9, the COD≤ 3000mg/L, BOD5 ≤ 300 ~ 500, ρ (SS) ≤ 850 mg / L, AOX ≤ 20, the chroma ≤ 1000times. May 1, 2021 to implement the new standard for the paper industry standards for water pollutants (in GB35442021) provides pH = 6~9 of COD≤80mg/L and BOD5≤ 20mg/L, ρ(SS)≤30mg/L,of AOX≤12, the chromaticity≤50times. This makes papermaking wastewater discharge standards imminent. Materialized pretreatment biochemical treatment materialized depth of processing approach to the middle of the wastewater, the effluent pliance. Through the analysis of the water quality capacity of raw water, pare the various deal with process characteristics, This design selects hydrolysis the the acidification carrousel oxidation ditch coagulation and sedimentation tertiary treatment craft to TREATMENT OF STRAW PULP midcourse wastewater, but the pliance of the effluent emissions. Key words: straw pulp papermaking, midcourse wastewater, carrousel oxidation ditch, the integrated treatment 河南城建學(xué)院畢業(yè)設(shè)計(jì) 目 錄 III 目 錄 摘 要 ................................................................................................................................. I Abstract............................................................................................................................. II 論 ..............................................................................................................................1 設(shè)計(jì)題目 .................................................................................................................1 設(shè)計(jì)目的和要求 .....................................................................................................2 設(shè)計(jì)目的 .........................................................................................................2 設(shè)計(jì)要求 .........................................................................................................2 設(shè)計(jì)任務(wù) .................................................................................................................2 設(shè)計(jì)規(guī)模 ..........................................................................................................2 設(shè)計(jì)進(jìn)出水水質(zhì)及排放標(biāo)準(zhǔn) ..........................................................................2 ....................................................................................3 草漿造紙工藝流程 .................................................................................................3 中段廢水來(lái)源 .........................................................................................................3 中段廢水的特性 .....................................................................................................4 ............................................................................................5 工藝方案分析 .........................................................................................................5 造紙中段廢水處理常用的方法及對(duì)比 .................................................................5 污水處理流程方案的確定 .....................................................................................6 ................................................................................................7 格柵 .........................................................................................................................7 設(shè)計(jì)參數(shù)及尺寸 ..............................................................................................8 集水池 .....................................................................................................................9 泵房形式及工藝布置 ....................................................................................10 泵房設(shè)計(jì)計(jì)算 ................................................................................................10 纖維回收間 ........................................................................................................... 11 一沉池 ...................................................................................................................12 設(shè)計(jì)原則設(shè)計(jì)參數(shù) ........................................................................................12 設(shè)計(jì)計(jì)算 ........................................................................................................13 水解酸化池 ................................................................................................