NGH cargo warehouse 10, a heat exchanger 22, the NGH cargo warehouse circulating 10 and the circulation to circulate between the heat exchanger 22 to supply heat to the water circulating with a box provided with a for the pump 21, the gas discharged to the upper portion of the NGH cargo warehouse 10 pipe 11 and the circulating water arithmetic device installed 13, and also the NGH cargo storage (10) opening in the interior (16a) from the NGH cargo storage (10) in the circulating an NGH cargo warehouse (10) of the bottom than under the placement of drainage pipes (17) through to the circulating water piping (18) Indian cycling can drop tube ( 16) to the installation configuration. Thereby, NGH (natural gas hydrates), the efficiency by stabilizing the NGH pellets with a simple configuration in a transport ship (1) of NGH cargo storage (10) it is possible to re-solidifying gas well.
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