CAJ | 학술논문

印染企业采用热泵系统回收碱液能有效降低环境污染，节省能耗。本文针对碱回收热泵系统中水蒸汽压缩机温升小而造成效数不够的问题，提出采用螺杆水蒸汽压缩机替代罗茨式、离心式压缩机构成机械压缩式（MVR）系统。建立了系统各部件的数学模型，首先对系统工况的可行性进行核算，随后在合适的工况条件下计算了不同效数的MVR系统和蒸汽动力压缩式（TVR）系统的热力性能，并比较了各系统回收碱液的经济性。结果表明，在压缩机入口为一个大气压的条件下将质量分数4%的废碱液浓缩到30%不宜采用TVR系统；同时MVR系统的理论COP均高于20，且理论COP及换热器面积随处理效数增加而增加。采用螺杆水蒸汽压缩机构成的三效系统的经济性较其他系统要高，与罗茨机构成的双效系统相比，企业一年即可收回增加的固定成本。在综合考虑压缩机耗功以及设备成本的情况下，印染企业采用螺杆压缩机进行三效处理即可达到较好的节能效果。
인염기업채용열빙계통회수감액능유효강저배경오염，절성능모。본문침대감회수열빙계통중수증기압축궤온승소이조성효수불구적문제，제출채용라간수증기압축궤체대라자식、리심식압축궤구성궤계압축식（MVR）계통。건립료계통각부건적수학모형，수선대계통공황적가행성진행핵산，수후재합괄적공황조건하계산료불동효수적MVR계통화증기동력압축식（TVR）계통적열력성능，병비교료각계통회수감액적경제성。결과표명，재압축궤입구위일개대기압적조건하장질량분수4%적폐감액농축도30%불의채용TVR계통；동시MVR계통적이론COP균고우20，차이론COP급환열기면적수처리효수증가이증가。채용라간수증기압축궤구성적삼효계통적경제성교기타계통요고，여라자궤구성적쌍효계통상비，기업일년즉가수회증가적고정성본。재종합고필압축궤모공이급설비성본적정황하，인염기업채용라간압축궤진행삼효처리즉가체도교호적절능효과。
Lye recovery using heat pump is beneficial in pollution control and energy saving in the industry of printing and dyeing. This paper investigated mechanical vapor recompression (MVR) system with twin-screw vapor compressor instead of Roots or centrifugal compressor to solve the problem of insufficient number of effects caused by small temperature rise in the lye recovery heat pump system. The mathematical model of every component of the system was built,the feasibility of the system’s operation conditions were evaluated,and the thermal performances of different effects of MVR systems and thermal vapor recompression (TVR) systems were simulated and calculated under the suitable operation conditions,and the economic effects of the two systems were compared. The results showed that the TVR system was not favorable when the waste lye was concentrated from 4%to 30% at 1 atm. In addition,the theoretical COP of each MVR system was over 20, and the theoretical COP and the heat exchange area increased with the increase of number of effects. The economical efficiency of the heat pump system with twin-screw vapor compressor was better than other systems in the waste lye recovery process. Applying three-effect system with twin-screw vapor compressor to lye recovery can achieve better energy saving.