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    • 4. 发明专利
    • HYDROGEN GENERATOR
    • JPH10203801A
    • 1998-08-04
    • JP927097
    • 1997-01-22
    • OSAKA GAS ENG KK
    • ONISHI OSAMUTAKEMOTO TETSUYA
    • B01D53/02B01D53/04B01J23/46C01B3/38C01B3/56
    • PROBLEM TO BE SOLVED: To enable the downsizing of a desulphurization mechanism and the reduction of installation cost by placing a layer of an absorbing agent for removing an S-component contained in a raw material gas, at the upstream side of a layer of a reforming catalyst in a reformer tube. SOLUTION: A layer 21 of an absorbing agent (e.g. a layer of pellet-formed ZnO), which removes an S-component (e.g. mercaptan, etc.), an odorant, contained in a hydrocarbon gas (e.g. CH4 ) of a raw material gas, is placed at the upstream side of a layer 22 of a reforming catalyst (e.g. ruthenium catalyst layer) in a reformer tube 20. It is preferable that a preheating section 16 for preheating the raw material gas with exhaust heat from a burner 28, which heats the reformer tube 20, is placed, and the apparatus is constructed so that the layer 21 of absorbing agent is kept at the activating temperature with the heat which is given to the layer 21 of absorbing agent when the preheated raw material gas passes the layer 21 of absorbing agent and with the heat transmission from a casing 14. It is not necessary to separately place a heating mechanism for the layer 21 of absorbing agent.
    • 5. 发明专利
    • HEAT EXCHANGER
    • JPH10206042A
    • 1998-08-07
    • JP1100597
    • 1997-01-24
    • OSAKA GAS ENG KK
    • ONISHI OSAMUTAKEMOTO TETSUYA
    • F28D7/10C01B3/38
    • PROBLEM TO BE SOLVED: To enable keeping of the temperature of an object fluid discharged from a heat exchanger constant regardless of the flow rate of the object fluid by providing a heat transfer area altering means to allow altering of a contact area between a heat exchanger tube and a heat medium. SOLUTION: An object fluid passing through a heat exchanger tube 80b undergoes a heat exchange with water in a heat medium container 80a. Drain ports 80d, 80d' and 80d" and the heat exchanger tube 80b makes up a heat transfer area altering means in cooperation to allow altering of a contact area of the heat exchanger tube 80b with water. In other words, when the target production quantity of hydrogen is the maximum thereof and the flow rate of a mixture of H, and Co leaving a reformer 100 is high, it is necessary to set the heat exchange capacity of a heat exchanger 80 to the maximum. Hence, the drain port 80d of the maximum level alone is opened while the drain ports 80d' and 80d" of the medium and minimum levels respectively are closed. Thus, an overflow occurs only at the drain port 80d to maximize the amount of water within the heat medium container 80a thereby allowing the setting of the heat transfer area of the heat transfer tube 80b with the water to the maximum value.