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    • 29. 发明专利
    • TREATMENT OF CARBON DIOXIDE
    • JPH0538429A
    • 1993-02-19
    • JP19794791
    • 1991-08-07
    • MITSUBISHI HEAVY IND LTD
    • MINEMOTO MASAKINEGORO MASAAKI
    • B01D53/14B01D53/34B01D53/62B01J19/00C01B32/50
    • PURPOSE:To fix carbon dioxide using snow while conserving energy by a method wherein conc. separated carbon dioxide is mixed with snow to form a clathrate hydrate wherein a carbon dioxide molecule is incorporated in a water crystal and this clathrate hydrate is thrown away to the bottom of the sea in a very deep region. CONSTITUTION:The CO2-containing exhaust gas discharged from a combustion furnace is guided to a pretreatment device to be lowered in its temp. and, after unburnt carbon is removed, only CO2 is conc. and separated. When this carbon dioxide is mixed with snow while held to about 10 deg.C or lower, a clathrate hydrate wherein a carbon dioxide molecule is incorporated in snow or water crystals formed by the melting of snow is formed by chemical reaction at low temp. under pressure and sent to a clathrate separation tank 7 by a pump 6 and subjected to solid-liquid separation to be stored in a clathrate storage tank 8. Thereafter, the clathrate is enclosed in a container 9 and thrown to the bottom of the sea by a disposal ship 10 or a pressure feed pump. By this constitution, carbon dioxide is treated by a reduced amount of energy using snow present in the natural world skillfully.
    • 30. 发明专利
    • METHOD OF CONTROLLING ABSORBING TOWER
    • JPH01159020A
    • 1989-06-22
    • JP31768287
    • 1987-12-16
    • MITSUBISHI HEAVY IND LTD
    • HATANO SHIGEKAZUMINEMOTO MASAKIWATANABE ICHIRO
    • B01D53/14
    • PURPOSE:To maintain constant concentration of absorbent liquid at the outlet of an absorbing tower, by obtaining an appropriate quantity of absorbent liquid at the inlet thereof by calculating and judging the data from a densitometer, hygrometer and flow meter at the inlet thereof and controlling the same by a liquid flow control device. CONSTITUTION:The concentration, humidity, temperature and flow rate of gas at the inlet of an absorbing tower are measured by the densitometer 10, a hygrometer 11 (including a thermometer) and a flow meter 3. The flow rate of absorbent liquid at the outlet thereof from which the concentration at the outlet thereof is preset and the quantity of the absorbent liquid carried off as saturated water into the gas being treated are computed by a microcomputer 12 from the data of the gas concentration and flow rate and from the gas humidity and temperature, respectively. After correction of the evaporation quantity of the absorbent liquid, an appropriate quantity of the absorbent liquid at the inlet thereof is controlled by a liquid flow quantity control device 13, thereby maintaining the absorbent liquid at the outlet thereof at a constant concentration.