37results about How to "Reduce stirring power" patented technology

The invention discloses a stirred tank reactor and aims at improving a stirring turbine in the stirred tank reactor by using a four-layer combination stirring turbine. The stirring turbine comprises a first layer turbine, a second layer turbine, a third layer turbine and a fourth layer turbine which are arranged from the middle to the bottom of a stirring shaft sequentially. The first layer turbine is an upward axial flow turbine, the second layer turbine is a disk type turbine, the third layer turbine is an upward axial flow turbine, and the fourth layer turbine is a radial flow turbine. Radial circulation close to a liquid level, radial circulation close to a middle area of a stirred tank and radial circulation in a bottom area of the stirred tank are formed, so that circulation quantity inside the stirred tank is big and mixing time is short. Poor mixing area does not exist, and solid containing rate and gas containing rate are evenly distributed. A mass transfer condition of air and liquid is good, and single transfer efficiency is high. Entrainment quantity of sizing is greatly reduced, fouling of a heat exchanger is reduced, and service life is long. Operation cost is lowered, and production cost is saved.

The invention relates to an oxidating reactor for producing polybasic carboxylic acids. A flow gudie cylinder is arranged in a cylindrical stand pressure container, and two layers of mixing devices are axially arranged. The pressure container is internally provided with a baffle and liquid and air inlet nozzles, wherein, the flow guide cylinder has an upper layer and a lower layer. The surface of the upper layer cylinder is provided with holes with certain shape, and the lower end surface has a tapered expansion. The invention adopts the optimized and combined dual-layer flow guide cylinder mixing devices. Under the co-action of a mixing impeller and the flow guide cylinder, the materials of the oxidation reaction disperse rapidly to distribute the methyl aromatic hydrocarbon entering the container evenly in the solvent, and quickly react with the oxygen, and then the heat is rapidly transmitted out through even mixing and dispersing, so as to make the internal temperature of the container even, satisfy the technical requirements of oxidation and reduce the possibility of aggravated side reaction caused by partial high temperature.

The invention discloses an olefin polymerization reactor. The reactor comprises a polymerization kettle body, a stirring device, a feeding port and an overflowing port, wherein the polymerization kettle body is composed of a reaction segment, an enlargement segment, and a connection segment located between the reaction segment and the enlargement segment; the stirring device is arranged at the center inside the polymerization kettle body, is used for stirring raw materials in the kettle, and is composed of a transmission device, a stirring shaft and a stirring turbine which are sequentially connected; the feeding port is arranged on the side wall of the reaction segment of the polymerization kettle body and is used for adding solvent, catalyst and the like; and the overflowing port is used for discharging the slurry and controlling the liquid level in the kettle. By using the reactor, the entrainment can be effectively reduced.

The invention discloses a swept-back high-efficiency hot-plate diversion rectification multiphase reaction kettle. The reaction kettle comprises a cylindrical kettle body which is arranged vertically. A discharge port, a liquid feeding port, and a gas feeding port are sequentially arranged from top to bottom on the side wall of the kettle body. A central shaft connected with an outside motor is arranged vertically in the kettle body. The reaction kettle is characterized in that three layers of vertically arranged swept-back half-pipe turbo agitators are arranged on the central shaft. 6-10 high-efficiency heat-exchange diversion rectification devices are horizontally uniformly distributed between the outer end of the swept-back half-pipe turbo agitators and the inner wall of the kettle body. 4-6 sheets of side wall diversion full baffles are uniformly distributed on the inner wall of the kettle body. A liquid jet distributor connected with the liquid feeding port and a gas jet distributor connected with the gas feeding port are arranged on the bottom of the kettle body. An overflow zone is arranged in the kettle body. Reaction products pass through the overflow zone and is collected from the discharge port. The swept-back high-efficiency hot-plate diversion rectification multiphase reaction kettle has the advantages of good multiphase system mixing effect, large heat-exchange area, and precise temperature control.

A crystallizer with a rectifying hood comprises a barrel and a conical bottom, the rectifying hood shaped in a cone is arranged inside the lower portion of the conical bottom, a flow guiding cylinder is arranged inside the barrel, and a stirring device is arranged inside the flow guiding cylinder. The crystallizer with the rectifying hood is stable in flow pattern, free of stirring dead angle during mother liquid crystallization, beneficial to growing of crystals and higher in stirring efficiency; the cone-shaped rectifying hood not serving as a pressure bearing component can be reconstructed on an existing crystallizer; the crystallizer with the rectifying hood is simple in structure, convenient to manufacture and low in manufacturing cost.

The invention relates to a stirring tank which is applied to all kinds of stirring tanks and stirring devices in the alumina industry, in particularly to a stirring tank with baffle plates capable of reducing accumulating materials at the tank bottom. The stirring tank with the baffle plates capable of reducing the accumulating materials at the tank bottom comprises a tank body and the baffle plates, and is characterized in that included angles between straight panel at the middle upper portion of the baffle plates and the axial line of the tank body are between 0-90 degrees. The lower portions of the baffle plates are circular-arc-shaped and extend towards the bottom of the tank. The extending direction of the circular arcs is consistent with the rotating direction of material solution, and is concave downwards. The baffle plates are evenly distributed inside the tank body along the circumference. The stirring tank with the baffle plates capable of reducing the accumulating materials at the tank bottom can effectively strengthen solution flow speed and impact force on the bottom corners of the tank, and obviously reduce stirring power of the stirring tank and the phenomena of sedimentary accumulating materials and scabbing at the tank bottom.

The invention discloses a two-stage sludge hydrothermal reaction device. The device comprises: a plurality of slurrying reactors which are serially connected from front to back, a hydrothermal residence reactor and a plurality of flash evaporation reactors which are serially connected from front to back, and the hydrothermal residence reactor is arranged between the backmost slurrying reactor andthe headmost flash evaporation reactor, wherein at least one hydrothermal temperature reactor is also mounted between the hydrothermal residence reactor and the backmost slurrying reactor, every hydrothermal heating reactor is provided with a gas inlet tube, a gas outlet tube, a steam tube, a feed tube and a discharging tube which are connected with the corresponding hydrothermal heating reactor,a plurality of the hydrothermal heating reactors alternately run, and arrangement according to a preset timing sequence makes the discharging of the final-stage slurrying reactor and the feeding of the hydrothermal residence reactor continuously performed. The two-stage sludge hydrothermal reaction device disclosed in the invention simplifies the heating function of the hydrothermal reactor, and realizes good stirring performance, energy saving and high sludge treatment efficiency of the hydrothermal reactor.

The invention relates to an efficient and vertical fermentation tank and belongs to the technical field of fermentation devices. The fermentation tank comprises a vertical tank body, a motor, a speed reducer driven by the motor and a stirring shaft, wherein the lower end of the stirring shaft penetrates into the tank body, multiple stirring blades are arranged at the lower end of the stirring shaft at intervals, multiple helical channels sequentially are formed in the inner wall of the tank body from top to bottom, each helical channel is formed by splicing multiple helical blades fixed to the inner wall of the tank body along the central axis of the tank body in a surrounding mode and is provided with a through channel for containing the corresponding stirring blades, one stirring blade is located at the lower end of the corresponding helical channel and is same as the corresponding helical channel in helix angle, a zooming plate inclining towards the stirring shaft is arranged at the upper end of the helical channel, and the surfaces of the helical blades and the zooming plates are coated with continuous polytetrafluoroethylene coatings. The fermentation tank has the advantages that the structure is simple, and the oxygen dissolution rate can be remarkably improved without increase of stirrer diameter and rotation speed.