The invention provides an LPG transport ship cold energy recovery system which comprises a carbon capture unit, a first surge tank, a first-stage heat exchange unit, a second-stage heat exchange unit, a third-stage heat exchange unit, a supercharger unit, a reheating device, a carbon dioxide liquid storage tank and an LPG cargo hold which communicate with one another through a waste gas exhaust port formed in a main engine or a generator set. The cold energy of the LPG combustion process of the VLGC cargo hold and the cold energy of boil-off gas in the cargo hold are used for cooling the carbon dioxide gas captured by the carbon capture unit, meanwhile, the LPG subjected to heat exchange is converted into the state capable of meeting the requirements of downstream equipment, and the step-by-step utilization and the multi-stage circulating liquefaction process of the LPG cold energy are achieved. The comprehensive utilization of cold/hot energy is realized, the heat exchange efficiency is improved by fully utilizing the existing device on the ship, the investment cost is greatly reduced compared with the investment cost of re-investment of a set of low-temperature cooling device, and the subsequent treatment process cost and the later operation cost are reduced to a certain extent.

    本申请提供一种LPG运输船冷能回收系统,通过设置于主机或发电机组的废气排出口连通的碳捕集单元、第一稳压罐、一级热交换单元、二级热交换单元、三级热交换单元、增压器单元、再热装置、二氧化碳储液罐、以及LPG货舱,利用VLGC货舱LPG燃烧过程的冷能及货舱内蒸发气的冷能将碳捕集单元捕获的二氧化碳气体进行冷却降温,同时经过换热后的LPG转变为可满足下游设备要求的状态,实现LPG冷能的逐级利用与多级循环液化过程;不仅实现了冷/热能源的综合利用,还充分利用船舶上的现有装置提高换热效率,相较于重新投资一套低温冷却装置的投资费用大大减少,在一定程度上降低了后续处理工艺费用和后期操作费用。


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    Title :

    Cold energy recovery system for LPG (Liquefied Petroleum Gas) transport ship


    Additional title:

    一种LPG运输船冷能回收系统


    Contributors:
    CHEN YIZHUO (author) / ZHOU XINYUAN (author) / ZHANG DAOZHI (author) / ZHOU QINGHUA (author) / JIANG XIONGJIAN (author) / LIU LONGXIN (author)

    Publication date :

    2024-07-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES / B63J Hilfsanlagen auf Schiffen , AUXILIARIES ON VESSELS



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