Hydrocarbon recovery device and cleaning system

A hydrocarbon recovery device configured to remove a hydrocarbon from a treatment target gas which contains the hydrocarbon and to recover the hydrocarbon, the device comprising:

• a) a treatment chamber having an adsorbent arrangement space in which an adsorbent capable of adsorbing a hydrocarbon is to be arranged;
• b) a treatment-target-gas introduction valve which is a valve provided in a treatment-target-gas introduction tube connected to the treatment chamber;
• c) a treated-gas discharge valve which is a valve provided in a treated-gas discharge tube connected to the treatment chamber;
• d) a vacuum pump having an intake port connected to the treatment chamber by a vacuum suction tube;
• e) a hydrocarbon liquefier connected to an outlet port of the vacuum pump;
• f) a vacuum suction valve which is a valve provided in the vacuum suction tube;
• g) an atmospheric relief valve for allowing the treatment chamber to be open to ambient gas;
• and
• h) a valve controller configured to perform a gas-treating operation in which the treatment-target-gas introduction valve and the treated-gas discharge valve are opened while the vacuum suction valve and the atmospheric relief valve are closed, as well as an adsorbent-regenerating operation in which a suction sub-operation for closing the atmospheric relief valve and opening the vacuum suction valve, and an atmospheric relief sub-operation for opening the atmospheric relief valve and closing the vacuum suction valve, are alternately performed a plurality of times, with the treatment-target-gas introduction valve and the treated-gas discharge valve closed.