1102results about How to "Improve operational stability" patented technology

The invention discloses an attapulgite clay porous porous ceramsite, a preparation method of the ceramsite, and a purpose of the ceramsite. The ceramsite is prepared from raw materials of attapulgite clay and biomass, and a binder of industrial soluble glass. The ceramsite is prepared through calcining and oxidizing. The attapulgite clay porous ceramsite prepared by the present invention has advantages of high porosity, large specific surface area, high strength, strong water resistance, high water absorption, high catalytic activity, and the like. The porous ceramsite prepared by the presentinvention can be applied as a carrier for a catalyst, and a filling material for an aerated biological filter.

The present invention discloses separating method for converting methanol to prepare DMTO gas, and has improved process after four section compression in the front ethane eliminating process. The present invention has one increased hydrogenating oxygen conversion step between the five section compression and the reflux accumulator of ethane eliminating tower to eliminate acetylene and oxygen produced in the regeneration. Of the condensed and cooled material through the reflux accumulator of ethane eliminating tower, the liquid phase serves as the reflux liquid of the ethane eliminating tower, the gas phase is fed to the deep cooling methane eliminating system and the material after condensing and cooling enters the high pressure methane eliminating tower directly. The DMTO gas separating process can obtain ethylene recovering rate as high as 99.5 %.

The invention relates to a pavement structure and a testing device for bridge deck pavement bonding interface shearing-resistance characteristic, which are based on mechanics principle and indoor test, effectively simulate road surface and simulate stress conditions, can realize continuous change with 0-80 degrees of shearing angle, meet needs of different working conditions and are suitable for the design and research of the pavement structure, the indoor test and engineering test. The testing device comprises an upper part and a lower part, each part comprises a bearing board, a rolling shaft, an arc base, a semi-circular clamp, an internal collet and a clamp fixing device. The whole device also comprises an angle dial scale and an angle pointer and other attached parts which are used for indicating the size of the angle. A square testing piece is arranged in the internal collet, the semi-circular clamp and the base can rotate relatively, after the shearing angle is set, the clamp and the base are fixed by the clamp fixing device. The horizontal surface of the other side of the base is contacted with the bearing board in a rolling way by the rolling shaft, so as to lead the device loading to generate vertical displacement and to move horizontally at the same time.

The invention relates to a modified electrode for a bio-functional multilayer film and a preparation method thereof, which belongs to the technical field of an electrochemical biosensor and preparation thereof. The modified electrode for the bio-functional multilayer film is formed by assembling the bio-functional multilayer film on the surface of a base electrode, the composition of the bio-functional multilayer film can be described as (inorganic nano-plate/ biological active substance/ high polymer/ biological active substance)n, and the base electrode is a platinum electrode or a glass-carbon electrode. The modified electrode for the bio-functional multilayer film combines the biocompatibility of the high polymer and the rigid structure of the inorganic nano-plate, and has the advantages of sensitive signal response, high-efficiency catalytic ability, good operation stability and storage stability.

The invention relates to a mechanical arm for an injection molding machine, comprising a connecting plate, a rotary motor arranged at the end of the connecting plate, a half-finished product grabbing plate arranged on one surface of the connecting plate, and a finished product grabbing plate arranged on the other surface of the connecting plate, wherein the finished product grabbing plate is connected with the rotary motor through a finished product mechanical arm, the half-finished product grabbing plate is fixed on the other surface of the connecting plate through a mounting plate, a first air cylinder connected with the half-finished product grabbing plate is arranged on the mounting plate, a second air cylinder is arranged on the finished product mechanical arm, and the finished product mechanical arm is connected with the finished product grabbing plate through the second air cylinder. According to the invention, by arranging the half-finished product grabbing plate and the finished product grabbing plate, the encapsulation and injection molding processes of products are completely operated by the mechanical arm substituted for manpower, thereby improving the production efficiency and operational stability, and preventing the products from being damaged, so that the invention has the advantages of high positioning accuracy, simplicity of operation, simple structure, safety and reliability.

The invention discloses a piezoelectric and electromagnetic induction dual energy feedback type magneto-rheological vibration damper which comprises a vibration damper body and a vibration damper controller. The vibration damper body comprises a cylinder barrel, a pressure supporting floating piston, a middle isolation floating piston, a piston rod, piezoelectric generation modules, a spring pressing plate, a force transfer spring, a spring clamping seat, a lower permanent magnet, a magnetic coil, an upper permanent magnet, a magnetism isolating plate, a piston, an excitation coil winding, an electromagnetic induction coil fixing rod and an electromagnetic induction coil. A control box is arranged on the outer wall of the cylinder barrel, the vibration damper controller is arranged inside the control box, and a rectifier, a storage battery charging circuit, a first controllable constant current source circuit and a second controllable constant current source circuit are further arranged inside the control box. The invention further discloses a control method of the piezoelectric and electromagnetic induction dual energy feedback type magneto-rheological vibration damper. The piezoelectric and electromagnetic induction dual energy feedback type magneto-rheological vibration damper has the piezoelectric and electromagnetic induction dual energy feedback function, can achieve not only a damping change function but also a rigidity change purpose, and has good vibration damping performance.

The invention provides a method for separating dimethyl carbonate and methanol through pressure-swing distillation of heat pump, and an apparatus thereof. In the dimethyl carbonate and methanol through pressure-swing distillation of the heat pump, an atmospheric azeotropic steam material obtained from the top of an atmospheric rectification tower is supercharged and heated by a heat pump compressor, and is introduced to a reboiler at the bottom of the atmospheric rectification tower as a heat source, so a liquid in the atmospheric rectification tower is heated, and the self-condensation of the atmospheric azeotropic steam material is completed. Compared with traditional atmospheric azeotropic steam material condensation through using cooling water and kettle liquid heating realized through an extra external heat source, the method in the invention properly improves the temperature and the pressure of an atmospheric azeotropic steam through the heat pump compressor to make the atmospheric azeotropic steam realize the kettle liquid heating and the reasonable and effective energy cycle as a heat source; and the cost generated by the pump heat compressor is far lower than the cost of traditional cooling water and the external heat source, so a good economic benefit is generated.

The invention discloses a method for hydrotreating heavy hydrocarbon. A hydrotreatment process comprises a pre-hydrogenation reaction zone, an up-flow hydrogenation reaction zone and a fixed bed-trickle bed reaction zone. The method comprise the following steps that: catalytic cracking slurry oil and/or catalytic cracking heavy cycle oil pass/passes through the pre-hydrogenation reaction zone; the pre-hydrogenation reaction zone adopts a fixed bed-trickle bed operation mode; both the reaction effluent of the pre-hydrogenation reaction zone and a residual oil raw material are jointly introduced into the up-flow hydrogenation reaction zone and the fixed bed-trickle bed reaction zone in turn; and the final reaction effluent is separated. The method of directly taking the catalytic cracking residual oil, the catalytic cracking heavy cycle oil and the like as fluxing oil of the residual oil raw material is changed, and the catalytic cracking residual oil and the catalytic cracking heavy cycle oil are pretreated to retard the coking of a catalyst and effectively prevent the generation of a bed layer hot point, so that stable operation of an up-flow reactor is guaranteed, the service life of the catalyst is prolonged, simultaneously the product quality is improved.

The invention discloses a method for preparing 1,3-diglyceride from a surface active magnetic nanoparticle immobilized lipase, which comprises the following steps of: (1) preparing a superparamagnetic ferriferrous oxide (Fe3O4) nanoparticle by coprecipitation performed on a mixture of divalent ferric salt and trivalent ferric salt; performing modification by a silane coupling agent; and activating the surface of the modified nanoparticle by glutaraldehyde to obtain a surface active magnetic nanoparticle; (2) adding a lipase solution, stirring, washing and drying to obtain the immobilized lipase; and (3) catalyzing glycerol to perform an esterification reaction with a fatty acid by adopting the immobilized lipase to obtain the 1,3-diglyceride. By utilizing the immobilized lipase disclosed by the invention, the activity, the operation stability and the regioselectivity are obviously improved in the synthetic reaction of the 1,3-diglyceride; the recycling operation of the lipase is greatly simplified; and moreover, the 1,3-diglyceride is high in purity and does not contain harmful solvents.

The method for producing cyclohexanone by using coked benzene is implemented according to the following steps: A. hydrogenation of the coked benzene to prepare cyclohexene; B. extraction and rectification; C. hydratization of the cyclohexene to prepare cyclohexanol; D. separation and extraction of the cyclohexanol; E. dehydrogenation of the cyclohexanol to prepare the cyclohexanone; and F. refining of alcohol and ketone. The method has the advantages that 1. as the coked benzene, the product of the coal chemical industry, is used as the raw material, the method has resource advantage and cost advantage and saves 15-20 percent of resource and cost when compared with a cyclohexane method; 2. the method has high comprehensive yield rate and low hydrogen consumption, almost 99 percent of the coked benzene is converted into usable products, namely the cyclohexanone and the cyclohexane, the ratio between the cyclohexanone and the cyclohexane is 1:0.25, and the hydrogen consumption is reduced by two thirds; 3. the method is environment friendly; a small amount of waste gas and waste liquid is generated, and the investment in waste disposal is small, therefore the method is a clean production technology; and 4. the method is safer; the hydrogenation reaction and the hydratization reaction are both carried out in liquid, conditions are mild, and the method is safer when compared with a traditional oxidation technology, prevents the corrosion and the byproduct blockage and has high operation stability.

The invention relates to the technical field of hydrodynamic experimental researches, in particular to a vertical multi-plate wave maker. The vertical multi-plate wave maker comprises a water tank, a hydraulic station, a computer control system, a support, an actuator and a wave-making plate, wherein the hydraulic station is arranged on the water tank; the computer control system is used for generating nolinear wave control signals; the actuator is connected with the support; the wave-making plate is hinged with the actuator; the computer control system is electrically connected with the hydraulic station; the hydraulic station is connected with an actuator; the actuator is used for driving the wave-making plate to perform reciprocating motion; and the wave-making plate is formed by hinging a plurality of independent wave-making plates. According to the vertical multi-plate wave maker, vertical speed distribution can be accurately input, waves which are more complex and more variable than those produced by a vertical single-plate wave maker can be produced, and the wave-making accuracy is improved; an embedded system, a programmable logic controller or an industrial personal computer can be selected as a computer control unit, and the quantity and the size of required split plates are selected according to different application requirements of control accuracy, response speed, stability and the like; and on the premise that high accuracy and high response speed are guaranteed, the flexibility and the stability of system operation are enhanced, and the repairing and maintenance costs are reduced.

The invention discloses a handheld electronic device which comprises a first machine body, a second machine body, a sliding block and a positioning part. The first machine body is provided with a bearing surface. The second machine body is stacked on the bearing surface of the first machine body. A bottom surface of the second machine body faces the bearing surface of the first machine body and is provided with a chute. The sliding block is fixedly arranged on the bearing surface of the first machine body and is arranged in the chute in a sliding mode. The positioning part is arranged on the sliding block and is pressed against the inner wall of the chute. The inner wall of the chute is provided with a plurality of positioning concave holes. The positioning concave holes are respectively positioned at a plurality of positions of a moving path of the positioning part so as to mutually interfere with the positioning parts at the positions.

The invention discloses a fundamental wave and harmonic wave detecting method based on three-coefficient Nuttall windowed interpolation FFT. The method comprises the following steps of: obtaining a sampling data of a detected signal by an analog-to-digital converter; carrying out a three-coefficient Nuttall windowed FFT calculation on the sampling data; searching for a largest spectral line and an adjacent second largest spectral line of an amplitude spectral line for the fundamental wave and each harmonic in an FFT spectral line, according to the amplitude ratio of adjacent spectral peaks and an explicit formulation, directly calculating interpolation coefficients of the fundamental wave and each harmonic; and finally, obtaining the frequency, the amplitude and the phase of the fundamental wave and each harmonic by the interpolation calculation. The invention provides the three-coefficient Nuttall windowed interpolation FFT fundamental wave and harmonic detecting method for directly calculating the interpolation coefficients based on the explicit formulation. The invention has advantages of providing the windowed interpolation FFT fundamental wave and harmonic wave detecting method thereof with small calculated amount and high analysis precision.

An organic light-emitting diode (OLED) device which produces substantially white light includes a substrate; an anode disposed over the substrate; and a hole-injecting layer disposed over the anode. The device also includes a hole transport layer disposed over the hole-injecting layer; a light-emitting layer doped with a blue light-emitting compound, disposed directly on the hole transport layer; and an electron transport layer disposed over the blue light-emitting layer. The device further includes a cathode disposed over the electron transport layer and the hole transport layer, electron transport layer, or the electron transport layer and the hole transport layer being selectively doped in a region which corresponds to an entire layer or a partial portion of a layer in contact with the blue light-emitting layer, the selective doping being with a compound which emits light in the yellow region of the spectrum.

The invention discloses Pichia pastoris engineering bacteria of surface display candida antarctica lipase B (CALB) and a method for catalyzing and synthesizing short-chain aromatic ester. The method comprises the following steps of: fermenting a bacterial strain shake flask of the Pichia pastoris engineering bacteria of the surface display CALB to gain thalli; freezing and drying in vacuum for above 24h to prepare a whole-cell enzyme preparation; carrying out esterification reaction to obtain a short-chain aromatic ester product by adopting short-chain acid and short-chain alcohol as raw materials, the whole-cell enzyme preparation as a catalyst and liquid which can dissolve the short-chain acid and the short-chain alcohol as a solvent, wherein the temperature of the esterification reaction is 20-60 DEG C, the consistency of the whole-cell enzyme preparation of a reactant in a reaction system is 10-40g/L, and the reaction time is 1-6h. Compared with the prior report, the method greatly shortens the reaction time, has a productive rate as high as 98 percent and high continuous operating stability, can recycle the whole-cell catalyst which is centrifugally recovered after the reaction and greatly reduce production cost.

The invention relates to magnetic graphene oxide composite material immobilized horse radish peroxidase as well as a preparation method and application thereof, belonging to the technical field of inorganic materials and analysis. The preparation method comprises the steps of firstly preparing a magnetic polymer microsphere containing 6-arm polyethylene glycol amide (6-arm-PEG-NH2) from magnetic graphene oxide GO-Fe3O4 and 6-arm-PEG-NH2, immobilizing horse radish peroxidase, and degrading pollutant phenol by virtue of immobilized horse radish peroxidase. The synthetic process of the material is reasonable in design, and the carrier material is coupled with zymoid catalytic activity of graphene oxide and high density amino functional groups on the surface of a multi-arm polymer 6-arm-PEG-NH2, so that the activity and reutilization capacity of immobilized horse radish peroxidase are effectively improved; furthermore, the degradation velocity of prepared immobilized horse radish peroxidase is obviously higher than the degradation velocities of free enzyme and a carrier material.

The invention discloses a preparation method of starch super-absorbent resin, which includes: using starch pretreated by mechanical grinding as substrate, using acrylic acid as monomer and ammonium persulfate as initiator, using N, N'-methylene-bis-acrylamide as crosslinking agent, using sorbitan monooleate (Span-80), polyoxyethylene sorbitan monooleate (Tween-80), polyethyleneglycol and PDMS (polydimethylsiloxane) as composite dispersant, using cyclohexane as an oil phase, and preparing starch graft super-absorbent resin by reversed phase suspension polymerization. A reversed phase suspension polymerization system used for the method is stable, bonding-free and caking-free, the starch super-absorbent resin is even granular bead products requiring no demulsification, and post-treatment operations such as washing, drying and the like after filtering can be performed directly. Monomer conversion rate reaches more than 99%, water absorbency of the starch super-absorbent resin reaches 800gXg<-1>, salt absorbency (0.9% NaCl by weight) reaches 75gXg<-1>, and the starch super-absorbent resin is capable of being saturated in water absorption in 4-10 minutes.