摘要:
A reactor for heterogeneous synthesis of chemical compounds, in particular methanol, comprises: - a substantially cylindrical shell (12) closed at the opposite ends by respective bottoms (14, 16); - at least one first, adiabatic, catalytic bed (25, 26, 27) having a substantially annular section, coaxially supported inside the shell (12) in an upper portion (20) of the shell, the at least one catalytic bed (25, 26, 27) having an inlet side (25a, 26a, 27a) for the reagent gases or for a reaction mixture, and an outlet side (25b, 26b, 27b) for the reaction mixture, - a second, pseudo-isothermal, catalytic bed (31) having a substantially annular section, supported inside the shell (12) in a lower portion (21) of the shell, coaxially positioned with respect to the at least one first catalytic bed and at a pre-determined distance therefrom, said second catalytic bed having an inlet side for a reaction mixture coming from the at least one first catalytic bed (25, 26, 27) and an outlet side for gaseous reaction products; - a plurality of heat exchangers (45) supported and distributed in a respective annular portion of the second catalytic bed (31), the heat exchangers (45) being flown by a heat exchanger operating fluid.
摘要:
A reactor, which includes a reactor body and two reactor ends sealing the ends of the reactor body, a plurality of reactor tubes extending inside the reactor body at least partially between the reactor ends, and at least one heat pipe disposed inside at least one of the reactor tubes.
摘要:
The invention relates to a tube reactor for carrying out heterogeneous catalysed gas phase reactions comprising a thermal tube (2), which contains a catalyst material (3) and around which a fluid heat transfer medium (5) flows on the outer face (25) during operation, the catalyst material (3) consisting of particles (4). The tube reactor also comprises a temperature-sensitive optical waveguide (9) which is surrounded by a capillary tube (8), extends into the catalyst material (3) of the thermal tube (2), has measuring points (35) having a predetermined spacing (a M ) between adjacent measurement points (35) in the axial direction of the thermal tube (2), and can be connected to a source for optical signals and to an evaluation unit (31) for optical signals reflected by the optical waveguide (9). At least in an axial thermal tube portion (34) of predetermined length containing at least a part of the catalyst material (3), the optical waveguide (9) has measuring points (35) having a spacing (a M ) between adjacent measuring points (35) in the axial direction of the thermal tube (2) which is 0.8 to 5 times the shortest edge length (l K ) of all imaginary cuboids which, having a minimum volume in the cases in which nominal external dimensions are associated with the particles (4) of the catalyst material (3), in each case delimit a particle (4) on the assumption that the particle (4) has the nominal external dimension thereof, and in all other cases in each case delimit said particles (4) which belong to a proportion by mass of a minimum of 70 % of the catalyst material (3) to which all the particles (4) having imaginary cuboids belong, wherein each edge length is longer than the shortest edge length (l K ).
摘要:
Method for revamping a multi-bed ammonia converter, wherein said converter comprises a plurality of adiabatic catalytic beds including a first catalytic bed and one or more further catalytic bed(s), said catalytic beds being arranged in series so that the effluent of a bed is further reacted in the subsequent bed; at least a first inter-bed heat exchanger arranged between said first catalytic bed and a second catalytic bed to cool the effluent of said first bed before admission into said second bed, and optionally further inter-bed heat exchanger(s) arranged between consecutive beds; said method involves the conversion of said first catalytic bed into an isothermal catalytic bed.
摘要:
Provided is a heat exchanger type reaction tube having high uniformity and small heat loss. The heat exchanger type reaction tube includes: a first tube part (2) that forms a first flow channel (4) into which a feed gas flows and in which the feed gas moves down; a second tube part (3) that forms a second flow channel (5) which is connected to the first flow channel (4) and in which the feed gas moves up and that has a granular catalyst carrying support medium charged therein; and a heating device that heats the first tube part (2) and the second tube part (3). Then, the first flow channel (4) and the second flow channel (5) are adjacent to each other while being separated from each other by a partition wall, and the second flow channel (5) is provided with a distributor (8) which holds the catalyst carrying support medium and through which the feed gas passes.