摘要:
A grid 500 for distributing and mixing fluids in a duct 222 includes a plurality of lances 510 arranged in a first plane and configured to be positioned transverse to a direction of a first fluid flowing outside of the lances and within a predetermined flow area. Each of the plurality of lances 510 has at least one first inlet 511 and a plurality of outlet nozzles 555. One or more of the outlet nozzles is directed generally in the flow direction F of the first fluid outside of the lances, and is configured to discharge a second fluid therefrom.
摘要:
The invention relates to a device for mixing one fluid flow with another fluid flow, comprising a pipe (32) through which the fluid flow is guided. At least two distributors (31) for guiding the fluid flow are arranged inside the pipe. Said arrangement of the distributors is possible due to borings (33) in the casing of the pipe and said distributors have a free flow cross-section which is constant or continuously reduces in the main flow direction of the fluid, and said distributors have one or more rows of holes for guiding the second fluid into the fluid.
摘要:
An injector mixer arrangement (10) for supplying a reducing agent in gaseous form into a flue gas flowing in a gas duct (14) communicating with a catalyst (18a) in a selective catalytic reduction (SCR) reactor (12) arranged downstream of said injector mixer arrangement (10). The injector mixer arrangement (10) comprises an injector grid (22) equipped with a plurality of nozzles (30) arranged horizontally within the gas duct (14). The nozzles (30) are adapted to supply said reducing agent to the gas duct (14). The injector mixer arrangement (10) further comprises first stage mixer plates (24) and second stage mixer plates (26) arranged in the gas duct (14) downstream of said nozzles (30) and upstream of SCR reactor 12.
摘要:
A device (10) for dispensing individual components of a two-component adhesive includes first (12) and second (14) manifold members, each having a distribution chamber (12C, 14C) therein. A set of conveying tubes is supported within the dispensing device and collectively present a predetermined total cross-sectional flow area to the first distribution chamber. An array of openings (14G) and an array of passages (14P) extend through the second member (14). The openings receive the discharge ends of the conveying tubes. The passages are disposed in fluid communication with the second distribution chamber (14C). The passages collectively present a predetermined total cross-sectional flow area to the second distribution chamber member. The openings and the passages are laterally spaced with respect to each other such that the discharge ends of the tubes are interspersed among the passages.
摘要:
An air pollution control device according to the first embodiment of the present invention is an air pollution control device for reducing the amounts of NOx and Hg contained in flue gas 12 from a boiler 11. The air pollution control device includes: NH 4 Cl solution supply means 16 for spraying an NH 4 Cl solution 14 by a spray nozzle 15 into a flue gas duct 13 at the downstream of the boiler 11; a mixer 17 provided on the downstream side of a region where NH 4 Cl is gasified, for promoting mixing, with the flue gas 12, HCl and NH 3 which are generated when NH 4 Cl is gasified; a reduction-denitration device 18 including a denitration catalyst for reducing NOx in the flue gas 12 with NH 3 and for oxidizing Hg under the coexistence with HCl; and a wet desulfurization device 22 for reducing the amount of Hg oxidized in the reduction-denitration device 18 using a limestone-gypsum slurry 21.
摘要:
A reactor (1) is proposed for reacting a fluid educt stream (2) with a fluid oxidant stream (3) in the presence of a solid catalyst (4) in two or more stages on two or more catalyst packed beds (5), which are disposed horizontally, parallel to the longitudinal axis of a circular cylindrical reactor shell (6) in the inner chamber thereof, having hoods (7) removably attached to the ends of the reactor shell (6), said fluid educt stream (2) flowing through the reactor (1) from top to bottom, characterized in that - the two or more catalyst packed beds (5) are each formed by a plurality of modules, each comprising - a cuboid frame (8), which extends over the entire height of the catalyst packed bed and in which - one or more bottom screens (9) and a top screen (10) are inserted, - the solid catalyst (4) being poured in between the one or the more bottom screens (9) and the top screen (10), - that all modules of a catalyst packed bed (5) are assembled in a cuboid external frame (11), which is disposed horizontally in the reactor (1) and which extends substantially over the entire length and the entire width of the reactor (1), with the exception of the hoods, and - that a mixing device (12) is provided for the fluid oxidant stream (3) in the flow direction upstream of each catalyst packed bed (5).
摘要:
A system for mixing ortho-xylene with an oxygen-containing gas such as air comprises an evaporator vessel fed with the gas and having a lance projecting into the gas. The lance is provided with a metal spray nozzle for injecting droplets of hot liquid ortho-xylene into the gas stream, concurrently with the direction of flow of the gas. The metal at the surface of the spray nozzle, that in use is in contact with the liquid ortho-xylene, has a high surface hardness to resist erosion, particularly by cavitation. The system is useful in the production of phthalic anhydride by the oxidation of ortho-xylene with air, whereby the risk for deflagrations is reduced. A soft metal seal is the preferred gasket between the spray nozzle and the lance.