40results about How to "Extend continuous operation time" patented technology

The invention belongs to the technical field of organic synthesis and provides a polymerization inhibitor for acrylic acid monomer refining. The polymerization inhibitor comprises, by mass, 94-95% of hydroquinone, 4.0-5.0% of chlorpromazine and 1.0-2.0% of promethazine. Through use of two common chemical products in the original polymerization inhibitor, the modified polymerization inhibitor does not need change of original reaction conditions of the production device. The novel polymerization inhibitor can be prepared through simple and easy processes. The modified polymerization inhibitor can substantially prolong a rectifying tower continuous production period to 200 days in acrylic acid monomer production.

The invention discloses a freezing device comprising a heat insulating tank body, a feeding mechanism, a discharging mechanism, two conveying belts, a conveying belt stand, a top-blowing evaporator and a horizontal type centrifugal fan, wherein the feeding mechanism and a discharging mechanism are respectively arranged on a feed port and a discharge port of the heat insulating tank body, and the two conveying belts, the conveying belt stand, the top-blowing evaporator and the horizontal type centrifugal fan are arranged in the heat insulating tank body; a supporting rod is arranged below a cross beam of a support of the top-blowing evaporator, the supporting rod, the cross beam and the heat insulating tank body are fixedly connected to form a stressed member, and a frame-shaped fan stand is fixedly arranged on the supporting rod of the stressed member to form a stressed frame; an anti-icing bracket is arranged below the frozen conveying belt, a steam heating wind-shielding device is arranged below the conveying belt at the feeding port, the bottom of the feeding mechanism is provided with a conveying belt heating-up water tank, and a conveying belt tensioning shaft roll is arranged at the discharging mechanism. The invention has the advantages of stable structure, safe installation process of the evaporator and convenient use and also has the advantages of eliminating the phenomenon of icing under the conveying belts, prolonging the continuous running time of the freezing device and improving efficiency; and besides, because the low-temperature conveying belt is washed after immersed in the water tank and heated up, less water consumption and good cleaning effect are achieved.

The present invention provides a casting product which has an alumina barrier layer having further improved stability, and can exhibit superior oxidation resistance, carburization resistance, nitridation resistance, corrosion resistance and the like when used under high-temperature atmospheres. The casting product according to the present invention is one having an alumina barrier layer which is formed on the surface of a base and contains an aluminum oxide, wherein the aluminum oxide is represented by the formula: (Al(1-x)M(x))2O3 wherein M represents at least one element selected from Cr, Ni, Si and Fe and 0 < x < 0.5. The casting product according to the present invention is also one having an alumina barrier layer which is formed on the surface of a base and contains an aluminum oxide, wherein the aluminum oxide contains at least one element selected from Cr, Ni, Si and Fe which is dissolved in the form of a solid solution, and wherein the content ratio, in at.%, of at least one element selected from Cr, Ni, Si and Fe which is dissolved together with Al in the form of a solid solution satisfies the formula: Al / (Cr+Ni+Si+Fe) >= 2.0.

This apparatus for manufacturing ultrafine fiber comprises a nozzle (10), a laser irradiation unit (26), and a drawing chamber (21). The nozzle (10) comprises an inlet for supplying raw fibers (25), afirst spray outlet, communicating with the inlet, for delivering the raw fibers and spraying a first drawing gas stream (16) for drawing the raw fibers, and second spray outlets, disposed around thefirst spray outlet, for spraying a second drawing gas stream (17). The nozzle (10) is installed on the laser irradiation unit (26), and the raw fibers (25) delivered from the first spray nozzle are irradiated and melted by a laser. In the drawing chamber (21), the molten raw fibers (25) are drawn using the first drawing gas stream (16) and the second drawing gas stream (17) sprayed from the nozzle(10).

A filter, which belongs to a water purification and recovery device, includes a shell, and the shell is composed of a mud collection area, a flocculation area, a sedimentation area, a filtration area, and a clear water area in order from bottom to top. The mud collection area is a conical collection area. Mud hopper, a flange cap is placed on the top of the conical mud collecting hopper. The port of the conical mud collecting hopper on both sides of the flange cap has a mud water inlet connected to the flocculation area, and the opening on the top of the flange cap is connected to an air inlet pipe. The upper part of a central liquid inlet tank is connected to the water inlet pipe, the top is connected to the exhaust pipe, the bottom is fixed in the center of the flange cap, and there is a water outlet hole on the side wall where it connects with the flange cap. It is a multi-functional solid-liquid separation device that integrates, discharges, and cleans. It has good mud collection during operation, stable water outlet, high filter efficiency, long service life, long continuous operation time, small investment, good treatment effect, and low operating cost. It can operate continuously at low pressure, discharge the concentrated liquid regularly, and the operation and management are very convenient.

The present invention discloses an oil-injected screw compressor lubricant-adding equipment for adding lubricant to an oil-injected screw compressor, which can realize online lubricant adding. The equipment comprises a screw compressor and an oil-gas separator communicated by tubes, an oil storage cylinder is arranged in parallel on the tubes between the screw compressor and the oil-gas separator. The air inlet end of the oil storage cylinder is connected with the tubes between the screw compressor and the oil-gas separator and the outlet end of the oil storage cylinder is communicated with the oil-gas separator. Because the oil storage cylinder is arranged on the tubes between the screw compressor and the oil-gas separator, lubricating oil is added into the oil storage cylinder to complement lubricating oil to the screw compressor while the screw compressor is working. The equipment can ensure the quality of lubricating oil during recycling use, prolomg the service life of lubricating oil, reduce lubricating oil consumption by 40 to 60 percent and increase the continuous working time of the screw compressor. The equipment is especially suitable to be popularized on oil-injected screw compressors.

This invention discloses a bi-component compound fiber spinning component including an up and down shell, a sand pool, a ring sand cavity, a bearing plate, a series distribution plate, a composite plate and a fiber spraying plate characterizing that the sand pool and the ring sand cavity are coaxial filtering melts of the bi-component separately and serial pin holes are designed on the third distributing plate in the lower shell, pin tubes are mounted in the holes, bottoms of the tubes are set in composite holes matched to duplate which are greatly increase filtration areas of the two melts.

The invention discloses a process for strengthening nitrification treatment based on coupled type stripping and belongs to the technical field of sewage treatment. During the nitrification treatment process of sewage, under the condition of maintaining a certain content of dissolved oxygen in the system, the elastic filler is subjected to extrusion treatment with different degrees of deformation. The extrusion treatment includes the coupling of deep extrusion and shallow extrusion. , the deep extrusion is carried out when the system load drops, the outlet water quality is close to the target value or the system resistance exceeds the design inlet water distribution pressure, and the shallow extrusion is carried out when the system load is stable. The present invention combines deep extrusion and shallow extrusion, on the one hand, it can realize the release and redistribution of the biofilm filler, improve the mass transfer efficiency, and on the other hand, it can promote a more uniform distribution of dissolved oxygen inside and outside the biofilm filler. The synergistic effect of the two can strengthen the nitrification reaction, improve the efficiency of sewage treatment, and restore the quality of effluent water.

A cryocooler is described that can include a pressure wave generator, and a refrigeration device (for example, a coldhead), which can be used to liquefy a gas when the gas is exposed to a surface of the refrigeration device. The pressure wave generator can include one or more motors. Each motor can include a stator, and at least one electrical coil wound around a portion of the stator. The electrical coil can generate a reversing magnetic field when alternating electric current is passed through the electrical coil. The motor can further include a pressurized container that can be placed within the space enclosed by the stator, and a piston that can be placed inside the pressurized container. The stators can be placed external to the pressurized container. The piston is made by combining magnets that have opposite and transverse polarities, and are combined adjacently on a common reciprocating axis.

A method for preparing a bearing cage for a robot with a cooling and wear-resistant structure, which belongs to the field of mechanical basic parts and manufacturing technology, and includes a cage body 1, a cage body 2, and a set of hexagon socket head screws. The cage body A group of roller pockets are arranged on the first and the cage body two, the end surface of the cage body one close to the cage body two is provided with a first boss, and a group of spines are arranged on the outer wall of the first boss Claw, the end of the cage body two close to the cage body one is provided with a first groove, the inner wall of the first groove is provided with a set of wedge-shaped grooves, and the first boss is arranged on the first groove Inside, the set of pawls is engaged in a set of wedge-shaped grooves. The present invention adopts the design of the split structure, which is convenient for the replacement of the cage part. The ratchet and the wedge-shaped groove are placed to rotate radially, and the cage body 1 and the cage body 2 are formed by a set of hexagonal countersunk head screws to form a stable structure. The whole, prolonging the service life of the bearing.

The invention discloses a ground water hole pumping method aimed at the water damage of the roof separation layer of the working face. The invention is mainly designed for the situation that it is impossible to realize the upward drainage hole construction of huge thick mudstone underground and the ground penetration hole is too difficult. This method should first grasp the stratum conditions, determine the development position of the separation layer and the development height of the water-conducting fissure zone, and open a number of pumping boreholes from the central position of the working face corresponding to the ground, and rely on the ground drilling rig to construct vertically from top to bottom every 200-300m Drilling, the first-level drilling passes through the loose layer of the opening section, and drills to 10-20m below the bottom boundary of the bedrock layer; the second-level drilling drills the thick-walled flower tube to the bottom of the stratum where separation layers may develop 10-20m, and drills in the working face Advance to 100m away from the working face to carry out the pumping and drainage work of the pumping hole, absorb the water in the aquifer and the separation layer through the thick-walled flower tube, and set up the mine deep well submersible pump to drain it, so as to realize the pumping and drainage of the separation layer space With the interception, the problem of water accumulation on the top plate of the working face is solved.