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LNG接收站最大/最小外输量的确定方法——以浙江LNG接收站为例
引用本文:贾士栋,吕俊,邓青.LNG接收站最大/最小外输量的确定方法——以浙江LNG接收站为例[J].天然气工业,2013,33(6):86-90.
作者姓名:贾士栋  吕俊  邓青
作者单位:中海浙江宁波液化天然气有限公司
摘    要:〗LNG接收站的最大/最小外输量是其最重要的生产运行参数,最大外输量的确定应保证白天满足天然气管网最高峰时的用气需求,而最小外输量的确定则仅保证满足LNG接收站最低运行条件即可。为此,分析了罐内低压泵、再冷凝器、高压泵及气化器这4类设备的运行能力对确定LNG接收站最大/最小外输量的影响,明确了LNG接收站最小外输量的确定分允许火炬燃烧及不允许火炬燃烧2种计算工况:①在允许火炬燃烧并保证全厂各有1台主工艺设备运转的前提下,决定LNG接收站最小外输量的关键设备为高压泵的最小流量;②在不允许火炬燃烧并保证全厂各有1台主工艺设备运转的前提下,决定LNG接收站最小外输量的关键设备为冷凝BOG需要的LNG量。据此,得出浙江LNG接收站最大外输量为950 000 m3/h;在允许火炬燃烧的情况下,其最小外输量为75 331 m3/h;在不允许火炬燃烧的情况下,其最小外输量为302 601 m3/h。

关 键 词:浙江LNG接收站  最大外输量  最小外输量  罐内低压泵  再冷凝器  高压泵  气化器  变频

A method of calculating the maximum and minimum sendout rates of an LNG terminal in Zhejiang, China
Jia Shidong,Lü Jun,Deng Qing.A method of calculating the maximum and minimum sendout rates of an LNG terminal in Zhejiang, China[J].Natural Gas Industry,2013,33(6):86-90.
Authors:Jia Shidong  Lü Jun  Deng Qing
Affiliation:(CNOOC Zhejiang Ningbo LNG Co., Ltd., Ningbo, Zhejiang 315000, China
Abstract:The maximum and minimum sendout rates are the most important operation parameters for an LNG terminal: the former will help a natural gas pipeline network to satisfy the gas demand in the peaking times during the day, while the latter just guarantees the terminal's normal operation. In view of this, this paper first analyzed the impact of the operating capacity of low pressure pump, re condenser, high pressure pump, and vaporizer in LNG tanks on the determination of the maximum and minimum sendout rates of the terminal. In the calculation of the minimum sendout rate of an LNG terminal, there are two working conditions of allowing and not allowing the flare burn. Under the condition of allowing the flare burn and ensuring the running of a major facility, the key to determining the minimum sendout rate is the minimum flow rate of the high pressure pump; under the condition of not allowing the flare burn and ensuring the running of a major facility, the key to determining the minimum sendout rate is the LNG quantity required for condensing the BOG. Taking an LNG terminal in Zhejiang for example, the maximum sendout rate was calculated to be 950,000 m3/h, the minimum sendout rate was 75,331 m3/h and 302,601 m3/h respectively under the condition of allowing and not allowing the flare burn.
Keywords:LNG terminal  Zhejiang  maximum sendout rate  minimum sendout rate  low pressure pump  re-condenser  high pressure pump  vaporizer  frequency conversion
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