摘要:
A mixing tank is disclosed for reducing ingestion across an interface. The tank may include a first zone including most of the volume of the tank; a second zone including the interface; a source of mixing energy configured to provide a first bulk energy dissipation rate in the first zone; a divider located between said first zone and said second zone inhibiting transfer of said mixing energy from said first zone to said second zone to preserve in said second zone a bulk power dissipation level less than a said first bulk power dissipation level; and a mass transport passageway between said first zone and said second zone for preserving a uniformity between the first and second zones. A method is disclosed for manufacturing a mixing tank and for retrofitting and existing mixing tank and for managing mixing to prevent air ingestion.
摘要:
This fine particle production method involves a dissolving step in which a stirrer having a rotating stirring blade is used to dissolve at least one type of fine particle raw material in a solvent to obtain a fine particle raw material solution, and a precipitation step in which the fine particle raw material solution and at least one type of precipitation solvent for precipitating the fine particle raw material from the fine particle raw material solution are introduced between at least two treatment surfaces which are arranged oppositely one another, can move closer to and farther apart from one another, and at least one of which can rotate relative to the other, and the fine particle raw material solution and the at least one type of precipitation solvent are mixed in a thin film fluid formed between the at least two treatment surfaces, and the fine particles are precipitated. The stirring energy is determined by the stirring time conditions of the stirrer, the circumferential velocity conditions of the stirring blade, and the temperature conditions of the fine particle raw material solution, and in the dissolving step, the stirring energy is varied by changing at least one of the aforementioned conditions, and by changing the stirring energy, the degree of crystallization and the crystal form of the fine particles obtained in the precipitation step are controlled.
摘要:
The invention describes a kneading machine (10) for foods, in particular food doughs, comprising: a substantially cylindrically-shaped tank (12), provided with a circular base or bottom (14) and with a side wall (16) having a predefined height; at least one tool (18) in the form of an arm housed inside the tank (12) and activated in rotation by a motor to complete at least one movement about an axis substantially parallel and close to the vertical axis of the tank (12); a protrusion (22) having the shape of a generic solid of revolution with vertical axis, coming out from the bottom (14) of the tank (12). The protrusion (22) is arranged eccentric with respect to the circular bottom (14), so that the eccentricity, defined as the distance (D) of the vertical axis of such a protrusion (22) with respect to the vertical axis of the tank (12), is variable between 5% and 20% of the total length of the radius of such a bottom (14). The eccentricity of the protrusion (22) allows the dough, when pushed by the tool (18), to move in a discontinuous manner, with alternated lowering and raising stages, during each single rotation cycle of the tool (18). In addition, the maximum height (H1) of the protrusion (22) with respect to the bottom (14) is variable between 10% and 50% of the total height (H2) of the tank (12), so that the dough, when pushed by the tool (18), is able to move in a discontinuous manner also in the region of space of the tank (12) arranged above the protrusion (22).
摘要:
A reactor vessel including: a mixing chamber having a vertical length, an upper inlet, and a lower outlet; and a vertically oriented paddle within the mixing chamber and having a cross-sectional shape of a hydrofoil, wherein the paddle moves with respect to the mixing chamber.
摘要:
Soak vessels for impregnating biomass with a liquid such as a dilute acid and methods for impregnating biomass are disclosed. In some embodiments, the soak vessel includes an impeller assembly with impellers that create a vortex to submerge the biomass, that agitate and separate contaminants from the biomass and that direct biomass and contaminants to separate vessel outlets.
摘要:
A steam stripping apparatus is provided that prevents adherence of crumbs to an inner wall of a crumbing tank, pipe blockages caused by reaggregated large particle size crumbs, clogging of a screen by small particle size crumbs, and slipping in an extruder, and which can operate over a long period of time. The crumbing tank includes a stir shaft and an impeller, and also has a baffle plate on an inner wall face. The impeller has a knife blade. The baffle plate has an approximately triangular cross-sectional shape having, on a cross section in a cylindrical lateral direction of the crumbing tank, a side face on each of an upstream side and a downstream side with respect to a flow direction of a fluid, and in which the upstream-side side face and the downstream-side side face meet to form an intersection point. An angle of the baffle plate that is formed by a line segment of the upstream-side side face on a cross section in a cylindrical lateral direction of the crumbing tank and a line segment that connects to the intersection point from the center of the stir shaft is between 30 and 75 degrees. An angle of the baffle plate formed by a line segment of the downstream-side side face on the cross section in a cylindrical lateral direction of the crumbing tank and the line segment that connects to the intersection point from the center of the stir shaft is between 30 and 75 degrees.
摘要:
An apparatus and method for mixing a liquid having particulate includes a vessel for containing the liquid and an axial impeller rotating about a substantially vertical axis. The impeller is adapted for submerging below the liquid surface by a distance approximately one-quarter to one-half of the height of the liquid. The impeller is oriented upwardly to produce (a) an inner, upward flow region located along the vertical axis of the vessel, (b) a transition flow region above the impeller in which liquid moves radially outwardly toward the vessel sidewall, and (c) an outer, downward flow region located along the sidewall. The impeller spins at a variable speed, such that the flow is capable of entraining solid particles having a settling velocity of up to approximately 1 foot per minute in the liquid, and the speed of the impeller is chosen to enable particles having a desired settling velocity to settle to the vessel bottom.