The utility model relates to a negative pressure steam condensing heat exchanger from the exhaust system, including heat exchanger with steam entrance and steam condensate outlet, which is characterized by reduced diameter pipe and the exhaust pipe, the diameter shrinking pipe connection in the steam condensate outlet, wherein one end of the exhaust pipe is connected and communicated with the at the top of the heat exchanger to heat exchanger in the gas and the phase space, the exhaust pipe and the other end of the pipe is communicated with the necking. The utility model in negative pressure steam condensing heat exchanger from the exhaust system, the heat exchanger in the steam condensate condensate outlet pipe arranged on a pipe necking and a section of the heat exchanger and the exhaust steam side top space pipe communicated, steam condensate in the necking occurs at the pipe pressure head and dynamic conversion the static head, resulting in reduced negative pressure, is connected with the automatic extraction of change above the non condensable gas through the exhaust pipe heat exchanger, non condensable gas by steam condensate system with high-speed downflow. The self exhaust system of the negative pressure steam condensing exchanger saves the vacuum pump, saves the investment of the equipment, reduces the energy consumption and saves the operation cost. At the same time, the exhaust pipe in the self exhaust system of the negative pressure steam condensate exchanger is located outside the heat exchanger, and the cutting valve can be installed in the exhaust pipe, which is convenient for operation and maintenance.
【技术实现步骤摘要】
一种负压蒸汽冷凝换热器自排气系统
本技术涉及换热设备
,具体涉及一种负压蒸汽冷凝换热器自排气系统。
技术介绍
蒸汽是化工装置中最常用的热源之一,在换热器中通过饱和蒸汽冷凝与冷物料换热是最典型的传热方式之一,但是蒸汽侧的不凝气积聚会严重影响换热器效率。根据工艺条件及冷物料物性参数的不同,作为热源的蒸汽参数(压力、温度)也不同,常见的有压力为40bar或10bar的中低压蒸汽。在这类正压条件下,在换热器蒸汽侧顶部设置一个排气阀即可定期的向大气排放不凝气。但在一些特定的工艺中,蒸汽作为乏汽需要被冷凝,如蒸汽透平表冷器(同时作为塔底再沸器)、格兰冷凝器等,蒸汽一般在负压或微正压条件下参与换热。对于这类负压或微正压的蒸汽系统,无法使用排气阀从换热器往大气排不凝气。现有技术中是在换热器外部设置一个小型真空泵用于抽取蒸汽系统内的不凝气。购置真空泵不但增加投资,真空泵还会给设备布置和配管带来复杂性。同时真空泵需要消耗一定量的动力蒸汽,蒸汽的排放还会带来大气及噪音污染。授权公告号为CN100354591C(申请号为200310120895.4)的中国专利技术专利《一种笙喉式自 ...
【技术保护点】
一种负压蒸汽冷凝换热器自排气系统,包括具有蒸汽入口(11)和蒸汽凝液出口(12)的换热器(1),其特征在于:还包括缩径管件(2)和排气管(3),所述缩径管件(2)连接在蒸汽凝液出口(12)上,所述排气管(3)的一端连接在换热器(1)的顶部以与所述换热器(1)内的气相空间相连通,所述排气管(3)的另一端与所述缩径管件(2)相连通。
【技术特征摘要】
1.一种负压蒸汽冷凝换热器自排气系统,包括具有蒸汽入口(11)和蒸汽凝液出口(12)的换热器(1),其特征在于:还包括缩径管件(2)和排气管(3),所述缩径管件(2)连接在蒸汽凝液出口(12)上,所述排气管(3)的一端连接在换热器(1)的顶部以与所述换热器(1)内的气相空间相连通,所述排气管(3)的另一端与所述缩径管件(2)相连通。2.根据权利要求1所述的负压蒸汽冷凝换热器自排气系统,其特征在于:所述排气管(3)上设置有能够导通和关闭所述排气管(3)的切断阀(4)。3.根据权利要求1所述...
【专利技术属性】
技术研发人员:张启云,高海见,朱炳焕,许晨,屠宇侠,王珍,李亢,关晓,韩栋,
申请(专利权)人:中石化宁波工程有限公司,中石化宁波技术研究院有限公司,中石化炼化工程集团股份有限公司,
类型:新型
国别省市:浙江,33
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