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86 512-81666096117，calculation of maximum gasification capacity (bog) under storage tank operating conditions - doer equipment
classification：forum publishtime：2019-11-16 13:51:16
calculation of maximum gasification capacity (bog) under storage tank operating conditions
the maximum gasification capacity of the storage tank under operating conditions shall consider the bog generated by ① static evaporation of the storage tank, ② flash vaporization generated by 450 m3 / h of the loading system, and ③ liquid flash vaporization of the lng liquefaction unit. the bog generated when three situations occur at the same time shall be considered in the calculation.
calculation process:
① bog produced by static evaporation of storage tank:
w static = v ×η×ρ/ 24=20747 × 0.08% × 480/24=332kg/h=415nm ³/ h；
where: v = π ×（ 25/2）2 × 21.2=10406m ³， the amount of liquid contained at the design liquid level of the storage tank;
② bog generated during filling of loading system:
the amount of bog generated by the loading system at 200m3 / h and the amount of bog generated by filling is about 1.5% according to the aspen software simulation and the empirical data of the liquefaction plant;
w input = 200 * 480 * 1.5% = 1440kg / h = 1800nm ³/ h；
③ flash vaporization caused by lng inlet:
for 1 million m3 / d (gaseous) lng plant, according to aspen software simulation and empirical data, the liquid inlet flash capacity is about 1.5% of the total liquid inlet;
gasification capacity is w input = 1000000 / 24 × 1.5%=625kg/h=781nm ³/ h；
therefore, under operating conditions, the maximum gasification capacity of the storage tank is:
w = w static w output w input = 415 1800 781 = 2996nm ³/ h。
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