5results about How to "Reduce saturation" patented technology

The utility model discloses a vortex dehumidification system, including shell and compressor, the centre of shell outside installs the compressor, and the output of compressor is fixed with the connecting pipe, the connecting pipe passes through the shell and is fixed with vortex pipe, the right upper corner of shell inside is installed with condenser, and the below of condenser is transversely provided with evaporator no. 2, the left side of condenser is fixed with first delivery pipe with the top of vortex pipe. This vortex dehumidification system is installed with condenser in the right upper corner of shell inside, and the compressor compressed refrigerant medium enters vortex pipe through connecting pipe, and enters condenser through the first delivery pipe of hot end, and enters evaporator no. 2 through the second delivery pipe of cold end, and the refrigerant medium in condenser condenses and enters evaporator no. 1 through right pipeline, and the refrigerant medium after evaporation in evaporator no. 2 inside is converged to the place of three -way pipe through left pipeline, and is backflowed to the compressor, and the problem of internal circulation single -purpose is solved.

The invention discloses a method for removing oxalic acid and salts thereof in wastewater by using hydrogen peroxide. The method comprises the following steps: pretreating wastewater containing oxalic acid and salts thereof, and adjusting the pH value to 3.5-4.0; adding hydrogen peroxide into the adjusted wastewater, and uniformly stirring to obtain mixed wastewater; and feeding the mixed wastewater into an activated carbon reaction column in a pulse water feeding manner, and removing oxalic acid and salts thereof in the water. According to the method, the removal efficiency of oxalic acid is effectively improved, and compared with the prior art, the method has the advantages that the process is simple, secondary pollution is avoided, and the wastewater treatment efficiency and environmental friendliness are greatly improved.

The invention relates to the technical field of motors, in particular to a high-magnetism-gathering anti-saturation less rare earth permanent magnet and electromagnetic salient pole hybrid excitation motor which comprises a front end cover, a machine shell, a rear end cover, a rotating shaft, a stator and a rotor. The rotor is composed of a rotor iron core, neodymium iron boron permanent magnet steel, ferrite permanent magnet steel and an excitation winding, an even number of salient poles are uniformly distributed on the rotor iron core, arc-shaped contours are processed on two sides of a pole body of each salient pole to form a gourd-like excitation winding groove, the excitation winding is wound in the gourd-like excitation winding groove, and the excitation winding is wound in the excitation winding groove. Magnetic steel grooves for placing ferrite permanent magnet steel are formed in the outer sides of the gourd-like excitation winding grooves; and magnetic steel grooves for placing neodymium iron boron permanent magnet steel and arc-shaped magnetic isolation grooves are formed in the salient pole shoes. According to the invention, the magnetism gathering performance of the salient pole rotor can be effectively improved, the air gap flux density waveform can be improved, the distortion rate can be reduced, and the design of the gourd-like excitation winding grooves can effectively reduce the magnetic circuit saturation of the rotor and improve the torque performance of the motor.

The application discloses a preparation method of an oil slurry selective hydrogenation catalyst, and comprises the following steps: (1) preparing a molybdenum-cobalt impregnation solution with a volume greater than the pore volume of a catalyst carrier; (2) adding the catalyst carrier into a rotary vacuum impregnation dryer, spraying the molybdenum-cobalt impregnation solution onto the catalyst carrier under the conditions of rotation and vacuum, and then performing vacuumizing, rotary drying, and calcination to obtain the oil slurry selective hydrogenation catalyst. The oil slurry selective hydrogenation catalyst prepared by the method has both desulfurization activity and low three-ring and four-ring aromatic hydrocarbon saturation performance, and is suitable for a selective hydrogenation desulfurization reaction of catalytic oil slurry.

The application provides a motor rotor, a self-starting synchronous reluctance motor, a compressor and a motor rotor. The motor rotor has a slit slot, a second filling slot and a first filling slot on a first rotor lamination. An outer magnetic barrier layer includes the first filling slot, and an inner magnetic barrier layer includes the slit slot and the second filling slot at both ends of the slit slot. Between the second filling slot and the slit slot in the same layer of the inner magnetic barrier layer, there is a separation rib. A side of the separation rib close to an outer circle of the rotor has a center point in an axial plane. The distance between two center points corresponding to two separation ribs in any two adjacent layers of magnetic barrier layers along a d-axis direction is L. The maximum distance between the filling slots in the two adjacent layers of magnetic barrier layers along a q-axis direction is W, and 0<=L<2W. According to the application, the saturation degree of the magnetic conduction channel between the filling slots can be reduced, the motor harmonics can be reduced, the torque ripple can be reduced, the harmonic loss can be reduced, the motor efficiency and the operation stability can be improved.