第一變換爐直徑3200變換爐的結(jié)構(gòu)設(shè)計(jì)畢業(yè)設(shè)計(jì)論文-文庫(kù)吧資料
2025-07-02 19:27本頁(yè)面
【正文】 generator. Preferably the at least one reforming chamber, the at least one low temperature shift reaction chamber and the at least one steam generator are arranged in a mon vessel. Preferably the steam generator and at least one low temperature shift reaction chamber form a bined unit. Preferably the steam generator prises a water containing tank and the at least one low temperature shift reaction chamber extends through the tank. Alternatively the steam generator may prise at least one water containing tube which extends through the at least one low temperature shift reaction chamber. Preferably the vessel is generally cylindrical, the reforming chamber and steam generator are concentrically arranged about the axis of the vessel, the steam generator prises a water containing tank, the at least one low temperature shift reaction chamber extends axially through the water containing tank. Preferably the reforming chamber is generally cylindrical, the steam generator is annular and is arranged around and spaced from the reforming chamber. Preferably the means to supply hydrocarbon containing material to the reforming chamber prises a pipe extending through the space between the reforming chamber and the steam generator. Preferably the means to supply steam to the reforming chamber prises a pipe extending through the space between the reforming chamber and the steam generator. Preferably the means to supply steam and the means to supply hydrocarbon containing material share a mon pipe. Preferably the means to supply oxygen containing gas to the reforming chamber prises a pipe extending through the space between the reforming chamber and the steam generator. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical crosssectional view through a bined reformer and shift reactor according to the present invention. FIG. 2 is a horizontal crosssectional view through the bined reformer and shift reactor shown in FIG. 1. FIG. 3 is a vertical crosssectional view through an additional bined reformer and shift reactor according to the present invention. FIG. 4 is a horizontal crosssection view through the bined reformer and shift reactor shown in FIG. 3. FIG. 5 is vertical crosssectional view through a bined reformer and shift reactor showing a water containing tube extending through a low temperature shift reaction chamber. FIGS. 6 and 7 are, respectively, enlarged sectional views of the upper and lower portions of the reactor of FIG. 3. DETAILED DESCRIPTION OF THE INVENTION A bined reformer and shift reactor 310, shown in FIG. 1 and 2, prises a reformer 312, a plurality of low temperature shift reactors 314 and a steam generator 316 all arranged within a mon vessel 318. The vessel 318 is generally cylindrical, and has an axis 320. The vessel 318 is insulated. The reformer 312 prises a generally cylindrical reforming chamber 322 which contains a packed catalyst bed 324. The cylindrical reforming chamber 322 is arranged substantially concentric with, and within, the vessel 318. The catalyst 324 is suitable for high temperature catalytic partial oxidation reforming and catalytic steam reforming, . autothermal reforming, of a hydrocarbon fuel to produce hydrogen and carbon dioxide. The catalyst 324 is preferably nickel with amounts of a noble metal, for example platinum. Alternatively the catalyst may be simply a noble metal, . platinum, or simply nickel. The low temperature shift reactors 314 and steam generator 316 form a bined unit and have a generally annular crosssection. The low temperature shift reactors 314 and steam generator 316 are arranged in an annular space between the reforming chamber 322 and the vessel 318. The steam generator 316 prises an annular tank which is defined by an upper wall 326, a lower wall 328, by the vessel 318, which form a radially outer wall and by a cylindrical wall 330 which forms a radially inner wall. The steam generator 316 tank contains, in operation, a water space 332 and a steam space 334. Each low temperature shift reactor 314 prises a tube 336 which is filled with a suitable low temperature shift reaction catalyst 338, for example copper/zinc low temperature shift catalyst. The low temperature shift reactors 314 pass axially, with respect to the vessel 318, through the steam generator 316. The reforming chamber 322 is spaced from the cylindrical wall 330 to form an annular gap therebetween. The lower end 340 of the cylindrical wall 330 is closed and a layer of insulation 342 is arranged at the lower end of the cylindrical wall 330. The upper end 344 of the cylindrical wall 330 is open. The lower end 346 of the reforming chamber 322 is spaced from the closed lower end of the cylindrical wall 330, and is closed. The upper end 348 of the reforming chamber 322 is open and has a perforated plate to retain the catalyst while allowing free passage of gases. The vertical sides of the reforming chamber 322 are provided with insulation 387. A cylindrical shroud 350 is arranged coaxially between the reforming chamber 322 and the cylindrical wall 330. The upper end 52 of the shroud 350 is closed and a layer of insulation 354 is arranged at the upper
外語(yǔ)相關(guān)推薦
鄂ICP備17016276號(hào)-1