摘要:
A horizontal chemical reactor comprises at least one catalytic bed (5a-5d) arranged horizontally in the reactor and comprising a lower gas-permeable wall (6) for gas outlet, and a holding element (2) of the at least one catalytic bed.
摘要:
Method and apparatus for carrying out highly exothermic catalyzed reactions, like so-called oxidative reactions, in pseudo-isothermal conditions, for example the reaction for producing nitric acid and the reaction for producing formaldehyde.
摘要:
An apparatus (1) for carbamate decomposition and ammonia and carbon dioxide stripping from urea solutions, wherein a stripper (2) including a substantially cylindrical shell (3), which can be fitted onto a structure (6) for supporting the shell (3) in two distinct vertical positions rotated by 180 ° with respect to a horizontal symmetry axis (x-x) of the stripper. By virtue of the symmetrical design of stripper (2), the operation and the associated connections of the upper and lower portions are effectively interchangeable, thereby providing a substantial increase in the service life of the stripper when the stripper is rotated so as to bring a corrosion damaged upper part down, at the bottom of the apparatus, and bring the opposed, not yet damaged corresponding area up.
摘要:
A reforming apparatus of the type including an indirect heat exchange zone for the reforming reaction of a gaseous flow comprising methane and steam into CO, CO2 and H2, is provided with a plurality of floating-head tubes containing a reforming catalyst, a chamber for collection of the reaction products positioned downstream of the reaction products from the apparatus.
摘要:
A granulation process wherein a liquid is sprayed into a prilling tower (1) by means of a rotating prilling bucket (15) having a perforated side wall (15a), and the liquid jets exiting said perforated side wall are subjected to a vibrating action according to the axial direction (A-A) of the prilling tower (1), while the remaining liquid mass inside the bucket is kept substantially free from said vibrating action. A suitable apparatus is also disclosed, wherein the peripheral side wall (15a) of the prilling bucket (15) is connected to vibration imparting means and has a flexible connection with the frame (15b, 15c) of the bucket.
摘要:
A vibrating prilling bucket for granulation of a fluid substance, comprising a hub (11), an upper plate (12), a lower plate (13) and a perforated side wall (14), and further comprising a bottom casing (40) to prevent liquid loss. In a preferred embodiment, the casing is pressurized and hosts the vibration engine (30) of the bucket, providing also the air feed to said engine.
摘要:
A granulation process wherein a liquid is sprayed into a prilling tower (1) by means of a rotating prilling bucket (15) having a perforated side wall (15a), and the liquid jets exiting said perforated side wall are subjected to a vibrating action according to the axial direction (A-A) of the prilling tower (1), while the remaining liquid mass inside the bucket is kept substantially free from said vibrating action. A suitable apparatus is also disclosed, wherein the peripheral side wall (15a) of the prilling bucket (15) is connected to vibration imparting means and has a flexible connection with the frame (15b, 15c) of the bucket.
摘要:
A vibrating and rotating prilling bucket (15) for granulation of a fluid substance (U), said bucket (15) comprising a perforated side wall (15a) and vibrating devices (51, 52) arranged to deliver a force with constant direction (A-A). In a preferred embodiment, the vibrating unit comprise two counter-rotating vibrators delivering rotating forces which balance each other perpendicularly to said constant direction (A-A).
摘要:
A plate-shaped heat exchanger (20, 120) for a heat exchange unit (40) of a chemical reactor (60), that advantageously presents a thermal insulation obtained in an unusually simple and reliable manner, has a substantially flattened box-like structure (22), with a substantially parallelepiped, rectangular configuration, defining an internal chamber (24), and comprises an inlet connection (28) and an outlet connection (29) of a heat exchange operating fluid into and from said chamber (24), and a distributor pipe (10, 110) of said operating fluid inside said chamber (24), extended in said structure (22) at a long side (22a) of it, said distributor pipe (10, 110) comprising a first tube (30, 130) and a second tube (32, 132), positioned one inside the other, between said tubes, respectively external tube (30) and internal tube (32, 132), an interspace (30a) being defined in fluid communication, on one side, with said chamber (24) through a plurality of openings (26) provided in the external tube (30, 130) of said distributor pipe (10, 110), and, on the other side, with the internal tube (32, 132) of the same distributor pipe (10, 110), said internal tube (32, 132) being hydraulically connected to said inlet connection (28) for the heat exchange operating fluid.