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

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 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.

The invention discloses a method for preparing citric acid by fermentation. The method comprises the following steps: under conditions that the citric acid can be produced, inoculating Aspergillus niger in a fermentation medium for fermentation, and adding an inhibitor in the fermentation medium when the content of the Aspergillus niger in the fermentation medium achieves 1-1.7wt%, wherein the appropriate addition of the inhibitor can increase the content of the Aspergillus niger, but the increment of the Aspergillus niger does not exceed 0.2wt% per hour. In the fermentation of the citric acid by the technical scheme, the excessively fast growth of fermentative strains is effective inhibited, and fermentative bacterium and nutrient substances are all developed to a trend beneficial to production of the citric acid, so that the fermentation level is enhanced. Meanwhile, the balls of the fermentative strains are small and compact, and the mycelium is short, so that on the premise of guaranteeing the required amount of dissolved oxygen for fermentation, the stirring power is lowered, and consequently, the method is easy to operate and the production cost is lowered.

The invention discloses a device for continuously producing biogas by means of solid-state fermentation, and belongs to the field of anaerobic treatment technologies for organic waste. The device comprises a fermentation tank and a biogas collecting tank. A feed inlet is formed in the upper portion of the fermentation tank, a discharge outlet is formed in the lower portion of the fermentation tank, and a stirring shaft is arranged in the middle of the fermentation tank along the axial direction of a tank body. A plurality of support plates are parallelly arranged on the stirring shaft, are perpendicular to the axial direction of the stirring shaft and are used for carrying fermentation materials, and an opening is formed in each support plate, so that the fermentation materials can be transferred on different layers of support plates. Scraper blades are arranged on the stirring shaft, are perpendicular to planes of the support plates and can rotate on the planes of the support plates along with the stirring shaft, and a first biogas outlet is formed in the top of the fermentation tank and is connected with the biogas collecting tank by a pipeline, so that the biogas can be collected. The device has the advantages that the fermentation materials can be continuously fermented by the device for a long time, stirring power can be effectively reduced, and accordingly the economical efficiency of the integral reaction device can be improved.

The invention discloses an industrial waste water processing system. The industrial waste water processing system comprises a waste water storage tank, a waste water pipeline, a control valve, a chemical pump, a MVR evaporation system, and a recycled water storage tank; the MVR evaporation system comprises an evaporator and a compressor; heat pump technology is adopted to transform heat energy of condensed water to soft water in a hot water tank as an auxiliary heat source of the evaporator; an evaporation zone is connected with a vacuum pump; a discharge port of the evaporator is connected with a negative pressure discharging mechanism so as to guarantee system continuous feeding and continuous discharging. The industrial waste water processing system is capable of reducing the size of the evaporator and the size of a heat exchanger; the evaporator is connected with a chemical pump forced circulation via external connection, so that stirring power is reduced greatly; and at the same time, sinking and crystallization of concentrated waste water are realized, and continuous waste material discharging is realized; latent heat of condensed water is fully used; maximum energy utilization is realized; waste water harmless treatment is realized, and at the same time treatment cost is reduced as far as possible; and the processing process is automatic, continuous, and controllable.

The invention discloses a siloxane pyrolysis integrated reaction system which comprises a cylindrical kettle body. A central spindle connected with an external motor is vertically arranged inside the kettle body. The system is characterized in that three layers of stirrers are vertically arranged on the central spindle; a circulatory diversion heat-exchange cylinder with upper and lower openings sleeves the periphery of the stirrers; the upper end of the circulatory diversion heat-exchange cylinder is provided with a feed diversion distributor; 4-6 side-wall diversion full-baffles are uniformly distributed on the inner wall of the kettle body; the upper end of the kettle body is connected with a rectifying tower; the three layers of stirrers are an upper turbine-type agitator, a middle turbine-type agitator and a lower turbine-type agitator; the circulatory diversion heat-exchange cylinder is a frustum-shaped structure with big top and small bottom; and the body of the circulatory diversion heat-exchange cylinder is an annular enclosed structure enclosed by two layers of heat exchange plates, outer surfaces of which are embossed. The system provided by the invention has the following advantages: three-step reactions of the pyrolysis process are effectively controlled; heat exchange effect is improved; flow field of a pyrolysis kettle is optimized; and the purpose of raising yield of the annular body, stabilizing production, prolonging reaction period and improving quality of the annular body is achieved.

The invention discloses a combined quenching tank provided with an inner tank with a bottom inserted propeller, and belongs to the technical field of metal material heat treatment. The combined quenching tank comprises an outer tank, a support, at least one inner tank and corresponding bottom plate, and at least one stirring mechanism, wherein the outer tank and the inner tank form a structure which can be separated or combined relatively, the inner tank, the bottom plate and the support are arranged in the outer tank from top to bottom, the stirring mechanism is arranged in a corresponding water inlet on the bottom plate, the liquid at the bottom of the outer tank is delivered into the inner tank under the drive of the stirring mechanism, and the liquid moves in the inner tank from bottom to top, overflows from an upper opening of the inner tank to a gap between the outer tank and the inner tank and flows down and back to the bottom of the outer tank. By adopting the combined quenching tank provided with the inner tank with the bottom inserted propeller, higher stirring capability, uniform and oriented flow field and good cooling capability can be obtained. Meanwhile, the combined quenching tank structure can be combined flexibly according to the size of the workpiece and can also facilitate the installation, repair and cleaning of the equipment.

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 fermentation equipment with a flow guiding device, and relates to the technical field of a fermentation tank. The fermentation equipment with the flow guiding device comprisesa tank, wherein multiple groups of stirring paddles are arranged on a stirring shaft of the tank; each group of stirring paddles comprises a plurality of twisted paddles which push liquid upwards; a flow guiding barrel is arranged at the middle of the tank; a gap is formed between the flow guiding barrel and the inner wall of the tank; openings are formed in the upper end and lower end of the flowguiding barrel; the stirring paddles are located inside the flow guiding barrel; a flow guiding shell with a downward opening is formed inside the tank, is located at the upper end of the flow guiding barrel, and is semicircular; the center of the flow guiding shell sinks toward the flow guiding barrel; a flow guiding body is arranged inside the tank, is located at the lower end of the flow guiding barrel and is a cone; the vertex of the cone faces toward the flow guiding barrel; and the axis of the cone and the axis of the flow guiding barrel are located on the same straight line. Accordingto the technical scheme, the circulation speed of fermentation liquid in the tank can be accelerated, so that the fermentation liquid in the tank is fully mixed with oxygen, the dissolving of the oxygen is increased, and the stirring diameter is reduced, thereby reducing stirring power and consumption and saving energy.

The invention relates to a vacuum drying apparatus of domestic garbage that is an apparatus for vacuum drying of domestic garbage by rotary barrel, and is also an apparatus for improving reducing of stirring power and thermoconductivity by a heater installed on a stirring vane. The apparatus has: an input and output opening (2) of domestic garbage installed at one side, the rotary barrel (1) rotatably supporting the center at the other side by a rotary joint (3) connected with a vacuum air pump (P); the stirring vane (5) installed at the internal wall of the rotary barrel and provided with the heater (4); and a vacuum absorption mechanism (7) having an absorption port (6) usually stressed by an upper coercive power pointing the upper part of the rotary barrel.

The sludge hot digesting apparatus for preparing biological solid includes one sealed reaction tank possessing one water bath jacket with electrically heating pipe and one sludge discharge port in the bottom; one reaction tank top cover with sludge inlet and gas collecting port; one stirring paddle; and one aerating head. There is defoaming filament fixed onto the electric wire connected between the stirring paddle and the stirring motor. There may be also one other reaction tank connected serially to the first one. Inside the apparatus, may be realized aerobic sludge digestion, anaerobic / aerobic sludge digestion, self-heating aerobic sludge digestion and two section high temperature aerobic / medium temperature anaerobic sludge digestion. The present invention has high reaction rate and efficiency.

A process for preparing the syndiotactic polystyrene from stylene features that the metallocene compound, triisobutyl aluminium and alkyl aluminium are used as catalyst, the inertial solvent is used as medium and reaction temp is 10-100 deg.C.