| 摘要 |
PURPOSE:To permit decrease of the amt. of the steam to be directly added to gaseous hydrocarbon for reforming to a greater extent by using steam of a relatively low pressure within the same plant and evaporating the makeup water of low purity by the latent heat of condensation thereof. CONSTITUTION:The gaseous hydrocarbon (a) flowing out of a desulfurizer is first introduced into a packed column 1 and is brought into contact with circulating water in a liquid state, by which the water is evaporated and the gaseous hydrocarbon is humidified. The humidified gaseous hydrocarbon (b) is allowed to flow down in the tubes of a multi-tubular heat exchanger 2 and the circulating water is sprayed from above and is allowed to flow down the inside wall of the tubes so that both are brought into contact. Part (e) of the steam (d) generated from a methanol synthesis reactor 3 is introduced to the outside of the tubes and is condensed on the outside wall of the tubes. On the other hand, the steam (d) formed by the reactor 3 is subjected to removal of the condensed water and thereafter part thereof is introduced to the tube outside of the exchanger 2 so as to be utilized as a heat source; in addition, the other part (g) is allowed to flow down in the tubes of the exchanger 2 and is directly added to the humidified gaseous hydrocarbon (c) to makeup the deficiency of the moisture, by which the gaseous hydrocarbon (j) for reforming is obtd.
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