Recyclable natural gas hydrate mining device

The utility model belongs to the technical field of ocean oil and gas reservoir exploitation, and relates to a recyclable natural gas hydrate exploitation device. The special workboat comprises a special workboat body with an excavator storage bin, a seawater heating device, a recyclable hose, a water vapor absorption device, a special workboat gas storage tank, an excavator power recovery systemand an excavator. Gas-liquid separation is carried out on natural gas hydrate on the seabed, then natural gas is collected on the collecting ship, and decomposed natural gas is directly supplied to the excavating device and the special workboat, so that pollution-free utilization of resources is achieved. The mining device designed by the utility model is convenient to recover and operate for multiple times, reduces the limitation that the conventional natural gas hydrate mining device can only mine in a certain place, and is efficient in circulation. 本实用新型属于海洋油气藏开采技术领域，涉及的是一种可循环的天然气水合物开采装置。本实用新型包括有挖掘器储存仓的特种作业船、海水加温装置