CAJ | 학술논문

针对某石化废水的水质特点，提出了采用板式蒸发强制循环机械蒸汽再压缩工艺回收废水资源。在考虑浓缩液沸点升高及强制循环对系统影响的条件下，建立了 MVR 系统工艺计算数学模型，分析了蒸发温度、废水温度及压缩比对 MVR 系统的影响。模型求解结果表明：该废水采用常压蒸发，可降低系统能耗，同时高温进料有利于降低系统的总比传热面积；随着压缩比的增加，压缩机比电耗增加，而系统总比传热面积减小，且其减少的速率减缓，压缩比是控制系统传热温差、压缩机比电耗和总比传热面积的主要因素，压缩比对MVR 系统的投资和运行成本的控制起关键性作用，在废水进料温度45℃、浓缩液循环10 m3/h 的情况下，废水常压蒸发的适宜操作压缩比为1.4~1.6。
침대모석화폐수적수질특점，제출료채용판식증발강제순배궤계증기재압축공예회수폐수자원。재고필농축액비점승고급강제순배대계통영향적조건하，건립료 MVR 계통공예계산수학모형，분석료증발온도、폐수온도급압축비대 MVR 계통적영향。모형구해결과표명：해폐수채용상압증발，가강저계통능모，동시고온진료유리우강저계통적총비전열면적；수착압축비적증가，압축궤비전모증가，이계통총비전열면적감소，차기감소적속솔감완，압축비시공제계통전열온차、압축궤비전모화총비전열면적적주요인소，압축비대MVR 계통적투자화운행성본적공제기관건성작용，재폐수진료온도45℃、농축액순배10 m3/h 적정황하，폐수상압증발적괄의조작압축비위1.4~1.6。
According to properties of petrochemical wastewater, the mechanical vapor recompression (MVR) process using plate evaporator with forced circulation was proposed to recycle wastewater resources. Considering the influence of the boiling point elevation and forced circulation, the complete mathematical model of MVR process was developed for process optimization and analysis, and the influence of evporation temperature, wastewater temperature and compression ratio on the MVR system performance was analyzed. The results show that, the method of atmospheric evaporation can be used to reduce the energy consumption; higher waste water temperature can result in a slight decrease in specific heat transfer area; and when compression ratio increases, specific power consuption increases, but specific heat transfer area decreases. So the compression ratio is the controlling factor that determines the heat transfer temperature difference, specific power consumption and specific heat transfer area of the MVR system, and the compression ratio plays a key role in controlling investment and operation cost of the MVR system. When waste water temperature is 45 ℃, concentrated liquid recirculated flow rate is 10 m3/h, the economical compression ratio is 1.4 to 1.6.