浙江嘉兴市造纸业蒸汽系统节能改造方案

日期： 2023-02-22 作者：

浙江嘉兴某造纸业生产低克重高强度的牛皮纸和高强度瓦楞纸，年产可达5万吨，蒸汽来源于热电厂，热力管道输送压力1MPa（绝压）、180℃的饱和蒸汽进入分汽缸。烘缸排水口冷凝水温度较高为150℃，由于高温冷凝水含有大量热焓值没有被利用造成能源和资源的浪费。苏州晟德亿节能环保科技有限公司相关专家团队对现场进行了调研，提出了蒸汽节能的相关建议，形成本项目改造方案。
浙江嘉兴某造纸业设备基本参数
a.分汽缸提供压力为0.95MPa（绝压）、温度为177℃饱和蒸汽；
b.烘缸使用最大压力为0.5MPa（绝压）、温度为152℃饱和蒸汽；施胶前28个烘缸，施胶后14个烘缸，烘缸总数量为 42个。
纸品产量为250t/d,纸品的卷取干度为92%（及含水率为8%），吨纸品耗量为1.8t蒸汽；
计算烘缸冷凝水生成量：1.8×250×0.92/24=17.25t/h
浙江嘉兴某造纸业设备能耗分析
烘缸排水口冷凝水温度较高为150℃，热焓值很高未能充分利用。
浙江嘉兴某造纸业节能改造思路
应用本公司专利技术改造部分管网，烘缸做冷凝水密闭回收闪蒸系统，集中回收冷凝水进行闪蒸，引用热网中的蒸汽热源在引射器中混合提温升压，把低品位的闪蒸汽有效提升为高品位蒸汽并入管网供末端施胶后烘缸使用。

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