7 results about "Metal dusting" patented technology

The utility model relates to the technical field of drying, in particular to a metal powder drying device which comprises a drying charging barrel and a device cover set, the device cover set covers the upper end of the drying charging barrel in a sealing mode, an air inlet pipe is fixedly installed on the lower left side of the drying charging barrel and externally connected with an air heating device, and a pressure relief valve set is fixedly installed on the upper right side of the drying charging barrel. A motor is fixedly installed at the upper end of the device cover set. When the metal powder drying device is used, warm airflow supplies heat to metal powder through the annular cavity and the inclined channel by the aid of the heating device connected into the air inlet pipe, steam in the metal powder is ensured to be evaporated, and the pressure relief valve group is opened for pressure relief to finish drying.

The specification describes a gas heated reformer apparatus comprising: one or more tubes containing a steam reforming catalyst; and a shell surrounding said tube(s) and together with the tube(s) defining a shell side; wherein the shell comprises an inlet and outlet for a heat exchange medium; wherein the shell side is provided with a water gas shift catalyst located at one or more areas of the shell side where during use the heat exchange medium in contact with the shell side has a temperature of 500-750° C. Also described is a plant for producing hydrogen, ammonia or methanol comprising the gas heated reformer. A water gas shift catalyst can be retrofitted to an existing gas heater reformer.

A nickel-based alloy is coated with a silicate based nickel aluminide slurry diffusion coating.

At least a part of a burner for a catalytic reactor is coated with a silicate based nickel aluminide slurry diffusion coating.

The present invention relates to nickel-based alloys. More specifically, this disclosure relates to medium-to-high entropy nickel-based alloys having the following composition in weight percent (wt%): Cr 20.0-26.0; Fe <8.5; Mn <4.0; Si 0.5-2.0; Al 1.0-4.0; Ti 0.50-4.0; C <0.05; N <0.05; Ta <2.0; Nb <4.0; Co 3.0-6.0; Cu 2.1-6.0; Mo <2.0; W <1.0; optionally, B <0.005; optionally, P <0.005; optionally, S <0.005; optionally, Ca, Mg and Ce, totaling less than 0.5; Ni the remainder and incidental impurities. Nickel-based alloys meet the following requirements: a) Cu-(0.1*Fe+2.1)≧0.0 [wherein the formula, the values ​​of the alloying elements are expressed in weight percent], and b) ΔSm i x / (-R)≧1.36, TIFF2026516869000008.tif6170[where c i [where R is the mole fraction and R is the gas constant]. The nickel-based alloys according to this disclosure are primarily intended for solution-annealed objects adapted to be exposed to atmospheres in which metal dusting readily occurs.

A nickel-based alloy is coated with a silicate based nickel aluminide slurry diffusion coating.

The invention relates to a synthesis gas cooler (10) for cooling a synthesis gas for the industrial production of ammonia, comprising: a container (12), wherein the container (12) has an inlet (14) for supplying hot synthesis gas (16) and an outlet (18) for discharging cooled synthesis gas (22); a heat exchanger (24) provided in the container (12), for cooling the hot synthesis gas (16); a bypass line (34) for guiding a portion of the hot synthesis gas (16) past the heat exchanger (24); and a separating wall (32) provided in the container (12), for delimiting a mixing chamber (20). In order in particular to prevent damage caused by metal dusting, a protective volume is provided in the synthesis gas cooler (10), and the bypass line (34) runs through the protective volume (42) in such as way as to fluidically communicate with the mixing chamber (20).