能量平衡計(jì)算書

揚(yáng)子石化年產(chǎn)55萬噸對(duì)二甲苯項(xiàng)目能量平衡計(jì)算書附錄〔浙江大學(xué)怦然心動(dòng)團(tuán)隊(duì)李盛巧、喻虹羽、王挺、王嘯、藍(lán)佳龍目錄TOC\o"1-5"\h\z\o"CurrentDocument"能量平衡計(jì)算書 -1 -1.1總述 -1 -\o"CurrentDocument"1.2熱量衡算的原理和準(zhǔn)則 -1 -\o"CurrentDocument"1.3熱量衡算任務(wù) -2 -1.4熱量衡算 -2 -1.4.1三苯分離工段熱量衡算 -2 -1.4.2甲苯歧化及烷基轉(zhuǎn)移工段熱量衡算-4-1.4.3甲苯甲醇烷基化工段熱量衡算.???-8-\o"CurrentDocument"1.4.4異構(gòu)化工段熱量衡算 -12-1.5總結(jié) -16-能量平衡計(jì)算書1?1總述擬建一套年產(chǎn)值55萬噸的對(duì)二甲苯裝置，在全工藝段中伴隨著物料從一個(gè)體系或單元進(jìn)入另一個(gè)體系或單元，在發(fā)生質(zhì)量傳遞的同時(shí)也伴隨著能量的消耗、釋放和轉(zhuǎn)化。其中的能量變換數(shù)量關(guān)系可以從能量衡算求得，對(duì)于新設(shè)計(jì)的車間，可以由此確定設(shè)備的熱負(fù)荷。再根據(jù)設(shè)備的熱負(fù)荷大小、所處理物料的性質(zhì)及工藝要求選擇恰當(dāng)?shù)脑O(shè)備?？傊?，通過下述能量衡算，可以為后續(xù)設(shè)計(jì)工作中提高熱量的利用率，降低能耗提供主要依據(jù)。1.2熱量衡算的原理和準(zhǔn)則工程依據(jù)化工設(shè)計(jì)中關(guān)于熱量衡算的基本思想和要求，遵循基本規(guī)范與實(shí)際工藝相結(jié)合的原則，進(jìn)行熱量衡算書的編制。其中一個(gè)主要依據(jù)是能量平衡方程:&/&,其中，^Qin 表示輸入設(shè)備熱量的總和；表示輸出設(shè)備熱量的總和;&表示輸出設(shè)備熱量的總和;out'Ql——表示損失熱量的總和。對(duì)于連續(xù)系統(tǒng)：Q+W=￡Hout-￡Hin其中Q 設(shè)備的熱負(fù)荷。W——輸入系統(tǒng)的機(jī)械能。EHout——離開設(shè)備的各物料焓之和。EHin——進(jìn)入設(shè)備的各物料焓之和。在進(jìn)行全廠熱量衡算時(shí)，是以單元設(shè)備為基本單位，考慮由機(jī)械能轉(zhuǎn)換、化學(xué)反應(yīng)釋放和單純的物理變化帶來的熱量變化。最終對(duì)全工藝段進(jìn)行系統(tǒng)級(jí)的熱量平衡計(jì)算，進(jìn)而用于指導(dǎo)節(jié)能降耗設(shè)計(jì)工作。1.3熱量衡算任務(wù)在進(jìn)行對(duì)二甲苯裝置的熱量衡算中，主要通過定量計(jì)算完成下述基本任務(wù):/確定工藝單元中物料輸送機(jī)械（如泵）所需要的功率，以便于進(jìn)行設(shè)備的設(shè)計(jì)和選型；/確定精餾等單元操作中所需要的熱量或冷量以及傳遞速率，計(jì)算換熱設(shè)備的尺寸，確定加熱劑和冷卻劑的消耗量，為后續(xù)設(shè)計(jì)中比如供汽、供冷、供水等專業(yè)提供設(shè)備條件；/確定為保持一定反應(yīng)溫度所需移除或者加入的熱傳遞速率，指導(dǎo)反應(yīng)器的設(shè)計(jì)和選型；/提高熱量內(nèi)部集成度，充分利用余熱，提高能量利用率，降低能耗；/最終計(jì)算出總需求能量和能量的費(fèi)用，并由此確定工藝過程在經(jīng)濟(jì)上的可行性。1.4熱量衡算1.4.1三苯分離工段熱量衡算1.4.1.1二甲苯塔表2.1熱負(fù)荷表-冷凝器再沸器QHeatduty/Gcal/hr-28.011593527.6057722-0.4058213表2.2流股焓變計(jì)算表inout物流編號(hào)104C8C9TemperatureC166.8247146.3796188.978Pressurebar1.81.21.8VaporFrac000TotalFlowkmol/hr638.6267512.8306125.796TotalFlowkg/hr69566.3754447.1215119.24TotalFlowcum/hr94.9234972.3835721.01181EnthalpyGcal/hr0.04376390.1035486-0.4656058EHin(Gcal/hr)0.0437639413EHout(Gcal/hr)-0.362057135表2.3熱量平衡計(jì)算一覽表QHinHoutError-0.40582130.043763943-0.362057135-5.51228E-071.4.1.2第一三苯分離分隔壁塔表2.4熱負(fù)荷表-冷凝器再沸器QHeatduty/Gcal/hr-22.763009324.23954111.4765318表2.5流股焓變計(jì)算表inout物流編號(hào)103PRO-BENC7104TemperatureC12086.23632124.6322166.8247Pressurebar1.51.21.4162791.8VaporFrac0000TotalFlowkmol/hr1418.447257.3201522.5638.6267TotalFlowkg/h2148139.4169566.37TotalFlowcum/hr178.281924.8866462.8722594.92349EnthalpyGcal/hr5.7146383.5363543.611170.0437639EHin(Gcal/hr)5.71463767EHout(Gcal/hr)7.19128852表2.6熱量平衡計(jì)算一覽表QHinHoutError1.47653185.714637677.191288528.06281E-051.4.2甲苯歧化及烷基轉(zhuǎn)移工段熱量衡算表2.7熱負(fù)荷表_冷凝器再沸器QHeatduty/Gcal/hr-2.34258892.692108450.34951955表2.8流股焓變計(jì)算表inout物流編號(hào)213GAS-1PRO-BEN2REBTXTemperatureC100-4-4146.0659Pressurebar21.21.21.8VaporFrac0.1437583100TotalFlowkmol/hr291.402635.6631418.14916237.5903TotalFlowkg/hr26958.791514.1251314.74924129.92TotalFlowcum/hr665.0603649.90841.54671432.16755EnthalpyGcal/hr-0.4874231-0.819930.07699050.6050359EHin(Gcal/hr)-0.487423142EHout(Gcal/hr)-0.137903591表2.9熱量平衡計(jì)算一覽表QHinHoutError0.34951955-0.48742314-0.1379035912.86107E-091.4.2.2甲苯歧化及烷基轉(zhuǎn)移反應(yīng)器表2.10熱負(fù)荷表-QHeatduty/Gcal/hr0表2.11流股焓變計(jì)算表inoutin物流編號(hào)205206TemperatureC379.0565379.1717Pressurebar3030VaporFrac11TotalFlowkmol/hr2269.1992269.199TotalFlowkg/hr36033.9136033.91TotalFlowcum/hr4155.9324157.381EnthalpyGcal/hr8.4004438.400443EHin(Gcal/hr)8.400443EHout(Gcal/hr)8.400443表2.12熱量平衡計(jì)算一覽表QHinHoutError08.4004438.40044301.4.2.3氣液分離器表2.13熱負(fù)荷表—QHeatduty/Gcal/hr0.0217006361表2.14流股焓變計(jì)算表inout物流編號(hào)208209211TemperatureC252525Pressurebar302525VaporFrac0.868687710TotalFlowkmol/hr2269.2591977.856291.4026TotalFlowkg/hr36034.529075.72426958.79TotalFlowcum/hr1690.1791989.28832.46717EnthalpyGcal/hr-4.408758-2.820834-1.566223EHin(Gcal/hr)-4.408758EHout(Gcal/hr)-4.38706表2.15熱量平衡計(jì)算一覽表QHinHoutError0.0217006361-4.408758-4.387061.29501E-141.4.2.4E201歧化原料預(yù)熱器表2.16熱負(fù)荷表-QHeatduty/Gcal/hr9.24766834表2.17流股焓變計(jì)算表inout物流編號(hào)204207204-1208-1TemperatureC95.7786379.0565342.5878120Pressurebar30303030VaporFrac0.892601110.9120873TotalFlowkmol/hr2269.1992269.1992269.1992269.199TotalFlowkg/hr36033.9136033.9136033.9136033.91TotalFlowcum/hr2136.6444155.8563923.6612315.304EnthalpyGcal/hr-2.0150328.0986067.232636-1.149062EHin(Gcal/hr)6.08357375EHout(Gcal/hr)6.08357375表2.18熱量平衡計(jì)算一覽表QHinHoutError9.247668346.083573756.0835737501.4.2.5多級(jí)壓縮機(jī)表2.19熱負(fù)荷表

表2.20流股焓變計(jì)算表inout物流編號(hào)H2203TemperatureC25144.4174Pressurebar1.0132530VaporFrac11TotalFlowkmol/hr37.9115537.91155TotalFlowkg/hr76.4251476.42514TotalFlowcum/hr928.068744.4553EnthalpyGcal/hr1.03378E-050.0318618EHin(Gcal/hr)1.03377546e-05EHout(Gcal/hr)0.0318617974表2.21熱量平衡計(jì)算一覽表QWHinHoutError-0.09430598330.1261574421.03378E-050.03186188.41314E-08Heatduty/Gcal/hr-0.09430598330.12615744282029234Heatduty/Gcal/hr-0.09430598330.126157442820292341.4.2.6單級(jí)壓縮機(jī)表2.22熱負(fù)荷表-WHeatduty/Gcal/hr0.30854577472055028表2.23流股焓變計(jì)算表inout物流編號(hào)209210TemperatureC2545.30285Pressurebar2530VaporFrac11TotalFlowkmol/hr1977.8561977.856TotalFlowkg/hr9075.7249075.724TotalFlowcum/hr1989.2881775.455EnthalpyGcal/hr-2.820834-2.512288EHin(Gcal/hr)-2.820834EHout(Gcal/hr)-2.512288表2.24熱量平衡計(jì)算一覽表WHinHoutError0.30854577472-2.820834-2.5122887.30133E-071.4.3甲苯甲醇烷基化工段熱量衡算表2.25熱負(fù)荷表-冷凝器再沸器QHeatduty/Gcal/hr-2.717782943.196695420.478912表2.26流股焓變計(jì)算表inout物流編號(hào)319320WATER-1GAS-3TemperatureC8049116.970549Pressurebar1.81.21.81.2VaporFrac0001TotalFlowkmol/hr721.133780.90311620.928219.30234TotalFlowkg/hr14305.42541.53611186.2577.665TotalFlowcum/hr16.4393.33639612.42794426.4341EnthalpyGcal/hr-46.56182-4.491261-41.34812-0.243531EHin(Gcal/hr)-46.5618217EHout(Gcal/hr)-46.08290931.4.3.2第二甲醇塔1.4.3.2第二甲醇塔QHinHoutError0.478912-46.5618217-46.08290938.35227E-07表2.27熱量平衡計(jì)算一覽表醇表2.28熱負(fù)荷表-冷凝器再沸器QHeatduty/Gcal/hr-2.427942935.268610892.840668表2.29流股焓變計(jì)算表inout物流編號(hào)309310GAS-4311TemperatureC1002020136.6848Pressurebar1.81.21.21.8VaporFrac0.0187133010TotalFlowkmol/hr2098.101126.393131.321091940.387TotalFlowkg/hr1932427829.71929.6273184483TotalFlowcum/hr904.00299.106194630.4664245.1991EnthalpyGcal/hr6.276166-2.6805370.242411.55496EHin(Gcal/hr)6.27616588EHout(Gcal/hr)9.11682126表2.30熱量平衡計(jì)算一覽表QHinHoutError2.8406686.276165889.116821264.44262E-061.4.3.3第二三苯分離分隔壁塔表2.31熱負(fù)荷表-冷凝器再沸器QHeatduty/Gcal/hr-39.729646439.0024227-0.72722表2.32流股焓變計(jì)算表

inout物流編號(hào)311PRO-BEN3313314TemperatureC136.684886.752124.2059161.2972Pressurebar1.81.21.3851061.8VaporFrac0000TotalFlowkmol/hr1940.3877.7404681548.654383.9924TotalFlowkg/hr184483607.249814310840767.47TotalFlowcum/hr245.19910.7525778186.802155.8242EnthalpyGcal/hr11.554960.104938410.425690.2971022EHin(Gcal/hr)11.5549577EHout(Gcal/hr)10.8277329表2.33熱量平衡計(jì)算一覽表QHinHoutError-0.7272211.5549610.82773-1.5126E-061.4.3.4甲苯甲醇反應(yīng)器表2.34熱負(fù)荷表-QHeatduty/Gcal/hr-6.97333673表2.35流股焓變計(jì)算表inout物流編號(hào)304305TemperatureC384.2304384.2304Pressurebar55VaporFrac11TotalFlowkmol/hr2791.8062918.625TotalFlowkg/hr210396210396TotalFlowcum/hr29859.1231238.85EnthalpyGcal/hr18.3487411.3754EHin(Gcal/hr)18.3487413

EHout(Gcal/hr)11.3754046表2.36熱量平衡計(jì)算一覽表QHinHoutError-6.8490417.7817710.93273-4.68929E-071.4.3.5氣液分離器表2.37熱負(fù)荷表-QHeatduty/Gcal/hr-1.18290293表2.38流股焓變計(jì)算表inout物流編號(hào)306GAS-2307TemperatureC503535Pressurebar51.81.8VaporFrac0.0041461310TotalFlowkmol/hr2918.62599.390372819.235TotalFlowkg/hr2103962848.145207547TotalFlowcum/hr310.32611397.985237.5367EnthalpyGcal/hr-43.11510.5796227-44.87763EHin(Gcal/hr)-43.1151024EHout(Gcal/hr)-44.2980053表2.39熱量平衡計(jì)算一覽表QHinHoutError-1.1829-43.1151-44.298-2.53613E-081.4.3.6烷基化反應(yīng)進(jìn)口預(yù)熱器表2.40熱負(fù)荷表-QHeatduty/Gcal/hr45.8585026

表2.41流股焓變計(jì)算表inout物流編號(hào)303305303-1306-1TemperatureC96.39687384.2304351.8646120Pressurebar5555VaporFrac0110.0947037TotalFlowkmol/hr2791.812918.632791.812918.63TotalFlowkg/hr210397210397210397210397TotalFlowcum/hr262.444231238.928252.511989.713EnthalpyGcal/hr-31.1472411.3753514.71127-34.48315EHin(Gcal/hr)-19.7718838EHout(Gcal/hr)-19.7718838表2.42熱量平衡計(jì)算一覽表QHinHoutError45.8585026-19.7718838-19.771883801.4.4異構(gòu)化工段熱量衡算表2.43熱負(fù)荷表-冷凝器再沸器QHeatduty/Gcal/hr000表2.44流股焓變計(jì)算表inout物流編號(hào)405RE-BOT1RE-TOP1430423TemperatureC144.8725167.457144.7039144.7502167.4561Pressurebar1.61.81.21.21.8VaporFrac01010TotalFlowkmol/hr546.47248499.9048028.928353.5418721.755

TotalFlowkg/hr58018.63902461852405886869926015TotalFlowcum/hr76.561511638561134.9722321851243.533EnthalpyGcal/hr0.236699784.043075.51255978.209811.58253EHin(Gcal/hr)89.7923258EHout(Gcal/hr)89.7923258表2.45熱量平衡計(jì)算一覽表QHinHoutError089.792325889.792325801.4.4.2第二汽提塔表2.46熱負(fù)荷表_冷凝器再沸器QHeatduty/Gcal/hr-1.267571151.632504770.364934表2.47流股焓變計(jì)算表inout物流編號(hào)416PRO-BEN4GAS-5401TemperatureC1401010162.568Pressurebar81.21.21.8VaporFrac0.00231185010TotalFlowkmol/hr332.85976.3774958.550242317.932TotalFlowkg/hr34480.56506.2024220.511633753.85TotalFlowcum/hr49.045180.5755242166.537545.8586EnthalpyGcal/hr0.005945330.0610403-0.14173730.451576EHin(Gcal/hr)0.00594533144EHout(Gcal/hr)0.370878953表2.48熱量平衡計(jì)算一覽表QHinHoutError0.364934 0.005945 0.370879 1.03701E-061.4.4.3異構(gòu)化反應(yīng)器表2.49熱負(fù)荷表-QHeatduty/Gcal/hr0表2.50流股焓變計(jì)算表inout物流編號(hào)410412TemperatureC373.5394376.7692Pressurebar8.358.35VaporFrac11TotalFlowkmol/hr2652.1332652.133TotalFlowkg/hr53281.1453281.14TotalFlowcum/hr17130.9317215.63EnthalpyGcal/hr-2.026962-2.026962EHin(Gcal/hr)-2.026962EHout(Gcal/hr)-2.026962表2.51熱量平衡計(jì)算一覽表QHinHoutError0-2.026962-2.02696201.4.4.4氣液分離器表2.52熱負(fù)荷表-QHeatduty/Gcal/hr-0.658248784inout物流編號(hào)413414415TemperatureC2555Pressurebar8.3588VaporFrac0.876040210TotalFlowkmol/hr2652.1332319.273332.8597TotalFlowkg/hr53281.1418800.5834480.56TotalFlowcum/hr6949.3256710.92239.33669EnthalpyGcal/hr-17.8091-16.38111-2.086235EHin(Gcal/hr)-17.8090972EHout(Gcal/hr)-18.467346表2.54熱量平衡計(jì)算一覽表QHinHoutError-0.65825-17.8091-18.4673-2.43069E-081.4.4.5單機(jī)壓縮機(jī)表2.55熱負(fù)荷表Heatduty/Gcal/hr 0.019659表2.56流股焓變計(jì)算表inout物流編號(hào)H2-2407TemperatureC96.39687384.2304Pressurebar55VaporFrac01TotalFlowkmol/hr2791.812918.63TotalFlowkg/hr210397210397TotalFlowcum/hr262.444231238.9EnthalpyGcal/hr2.24883E-060.0196613EHin(Gcal/hr)2.24883E-06EHout(Gcal/hr)0.0196613表2.57熱量平衡計(jì)算一覽表WHinHoutError0.0196592.25E-060.0196611.63095E-061.4.4.6異構(gòu)化反應(yīng)進(jìn)口預(yù)熱器表2.58熱負(fù)荷表-QHeatduty/Gcal/hr12.2212617表2.59流股焓變計(jì)算表inout物流編號(hào)409412409-1413TemperatureC67.3434376.7692330102.7449Pressurebar8.358.358.358.35VaporFrac0.8858858110.9159968TotalFlowkmol/hr2652.1332652.1332652.1332652.133TotalFlowkg/hr53281.1453281.1453281.1453281.14TotalFlowcum/hr8023.57517215.6315972.859136.057EnthalpyGcal/hr-16.04628-2.026963-3.825014-14.24822EHin(Gcal/hr)-18.0732379EHout(Gcal/hr)-18.0732379表2.60熱量平衡計(jì)算一覽表QHinHoutError12.2212617-18.0732379-18.073237901.5總結(jié)通過本次熱量衡算，我們計(jì)算所有塔設(shè)備、反應(yīng)器、氣液分離器的能量流動(dòng)，并以典型換熱器和壓縮機(jī)為例，指導(dǎo)所有換熱器和流體輸送機(jī)械的能量衡算，最

終將收集到的數(shù)據(jù)進(jìn)行整理，以便于設(shè)備選型以及熱量集成。以下為流體輸送機(jī)械和換熱器的設(shè)備選型結(jié)果，其他詳見附錄四。表2.61泵選型一覽表泵編號(hào)流量/（L/s）總揚(yáng)程/m泵型號(hào)電機(jī)功率/KWP10136.5761695.7493147XA80/16（2臺(tái)并聯(lián)）2.4510158P2015.83668622399.6333750GDL18-15（3臺(tái)串聯(lián)）31.3338512P2024.26731612380.677708IS65-40-315（3臺(tái)串聯(lián)）30P3017.1956338451.270614IX180-65-160B（2臺(tái)串聯(lián)）5.19407277P30213.197376847.7279619IX180-65-160（2臺(tái)串聯(lián)）7.57151981P3040.9267727450.8679173IX132-25-160A（2臺(tái)串聯(lián)）1.19115348P3052.5294324645.0665376IX150-32-160B（2臺(tái)串聯(lián)）2.36222229P30651.889583948.1163956IS50-32-160B（單泵）24.8271025P40112.748020897.0787452IX180-65-160（3臺(tái)串聯(lián)）14.6833856P40221.26755445.38229602IS100-80-125（2臺(tái)并聯(lián)）1.2596129表2.62壓縮機(jī)選型一覽表編號(hào)品牌型號(hào)功率kw流量m3/min串并聯(lián)方式1CP201德鴻DH-30AG223.69臺(tái)并聯(lián)2CP401開山LG-1.2/84.51.23臺(tái)并聯(lián)3CP402ABBVW-45/845284臺(tái)并聯(lián)4CP403開山LGS-78/13G560906臺(tái)并聯(lián)5MC201蚌埠VF-6/306663臺(tái)并聯(lián)表2.63換熱器選型一覽表序號(hào)編號(hào)用途型號(hào)換熱管數(shù)目數(shù)目材料1E101第一甲醇回收塔塔釜再沸器（二甲苯塔頂冷凝器）BFM1100-0.6-237-3/19-1I13691Q345R

2E102二甲苯塔頂冷凝器BEM1300-0.6-269