53results about How to "Control contact time" patented technology

A particular arrangement of an FCC unit creates an immediate and sustained gravity separation of catalyst and hydrocarbon vapors in short contact time cracking operation. A transverse feed contactor ejects the mixture of catalyst and hydrocarbon vapors transversely into a central portion of a separation vessel for vertical disengagement of catalyst from vapors. The vapors travel upwardly in the vessel into an inertial separator that quickly segregates entrained catalyst from the hydrocarbon vapors and collects separated catalyst at a higher elevation for stripping of adsorbed hydrocarbons from the catalyst.

The invention discloses an acute spinal cord injury animal model modeling impactor, which is characterized by comprising a bracket, a lever, a guide rail, a probe and a relay device for driving the lever. A support point of the lever is arranged on the bracket; one end of the lever is provided with a sucking disc, the other end is connected with the upper end of the probe; the relay device and the guide rail are both fixed on the bracket along a vertical direction; the relay device is arranged above the sucking disc; the probe is arranged in the guide rail along the vertical direction; a return spring is arranged between the upper end of the guide rail and the upper end of the probe; the relay device comprises a multiple-turn coil and an iron core; the iron core is inserted in the multiple-turn coil; and the terminal of the multiple-turn coil is connected with a controllable current output interface of an external circuit. The impact degree and time of the impactor can be controlled, the impact position is more correct, and the repeatability of the impact operation is strong.

The invention discloses a down-flow catalytic cracking/ cracking reactor for processing heavy raw oil, comprising a gas-solid parallel flow descending super short contact catalytic reactor, a steam stripping device, a cascade turbulent fluidized bed form first section regenerator and a lift tube form second section regenerator, wherein the second section regenerator is connected to the main unit of the reactor through a pre-lift tube.

The invention relates to a preparation method of a metallic oxide coated battery cathode material. The preparation method comprises the steps as follows: a cathode material substrate is coated with a coating liquid in an air-stream mill in an impinging stream manner, and a coated material precursor is obtained; the obtained coated material precursor is sintered and the metallic oxide coated battery cathode material is obtained. According to the preparation method, the battery cathode material is coated with a metallic oxide in the impinging stream manner by the aid of air-stream mill equipment, the coating rate and coating uniformity of the metallic oxide are increased, meanwhile, the coating process is controlled by adjusting parameters of the air-stream mill, and the preparation method is simple and can be applied to industrial production.

The invention discloses a worktable type electronic impact hammer. The worktable type electronic impact hammer is characterized by comprising a worktable, a controller, a trigger and a direct-current power supply, wherein the controller and the trigger are respectively connected with the direct-current power supply; the controller is respectively connected with the trigger and an actuator; the actuator comprises a traction type electromagnet; an iron core extending part of the electromagnet is connected with a force sensor; an impact head with a protecting function is arranged at the front end of the force sensor; and the electromagnet is arranged on a platform of the worktable. The repeatability and the adjustability of impact force are guaranteed, the time for contact between the hammer and a mechanical structure to be measured is controlled reliably so as to obtain ideal force pulse, and the worktable type electronic impact hammer is particularly applied to modal analysis, automatic impact testing and finite element analysis (FEA) modal verification of the mechanical structure.

The invention relates to a disk-type assembled bagged catalytic distillation filler, which structurally comprises an assembly A and an assembly B, wherein the assembly A is a rectangular catalyst bag formed through seaming and is filled with catalyst particles; the assembly B is a regular filler sheet; and the regular filler sheet of the assembly B and the catalyst bag of the assembly A are tightly stacked in parallel and are curled into a disk-type spiral structure and then fixed by using a banding sheet to form the catalytic distillation filler. The catalyst bag is adjustable in seaming size, the loading density of the catalyst is adjustable, the content of the catalyst is adjusted and the utilization rate of the catalyst is improved. The assembly A and the assembly B are alternately arranged, so that flowing of a liquid is improved by the regular filler sheet, uniform distribution of gas and liquid phases is ensured, a reactant and a product are continuously separated to the tower top and the tower bottom, the mass transfer process is promoted and the reaction rate is improved. The catalytic distillation filler is of the disk-type spiral structure and the catalyst bag and the regular filler sheet are arranged at an interval, so that uniform distribution of gas and liquid phases is improved, and meanwhile, the pressure drop can be reduced.

The invention discloses a method for controlling droplet impact form, contact time and droplet controllable splitting. The method comprises the steps of 1 designing a template; 2 manufacturing the template; 3 treating the template surface; 4 carrying out liquid drop impact; and 5 observing and analyzing the impact form and dynamics. Impact dynamics with variable forms is obtained by changing the shape, size, number and position of obstacles on the template, the impact position of liquid drops and other factors. and the boundary between spreading and retreat are broken, so that spreading and retreating coexist in the process of droplet impact. The contact time is shortened, the impact form of a single droplet is variable and controllable, and the splitting of the droplet is controllable during impact by controlling the impact dynamics of different forms. The method is simple to operate, low in cost and good in effect, and can be applied to the fields of self-cleaning, printing, open microfluid, food and drug split charging and conveying and the like.

The invention discloses a formaldehyde fumigation method and a formaldehyde fumigation device. According to the invention, the contact time of formaldehyde and potassium permanganate can be well controlled, so that formaldehyde can fully react, and no formaldehyde liquid being left is ensured, and the effect of fumigation for a sealed room is achieved; formaldehyde and potassium permanganate reacts after an operator leaves the room to be disinfected, so that open fire is avoided during the whole fumigation process, and the safety of the operator is ensured.

The invention belongs to the technical field of refiningof medicinal oil, and discloses a method for accurately controlling the proportion of specific fatty acid in oil by adopting a microcirculationtechnology. The method comprises the following steps: A, uniformly mixing lipase, inorganic base, a filter aid and an adsorbent in a physical mode to form a mixed filler, wherein the lipase is Sn-1,3-specific lipase; and B, enabling edible oil to flow through the mixed filler to obtain refined oil. The method solves the problems that the content of palmitic acid cannot be accurately controlled andthe requirement for preparing a high-quality fat emulsion preparation cannot be met in a traditional edible oil production process.

The invention relates to the technical field of oil field drilling fluid and well cementation, and discloses a preparation method of spherical metal mineral powder. The preparation method comprises the following steps: (1) mixing the metal mineral powder with compressed gas in a venturi mixer to obtain a mixture, and the compressed gas is compressed gas with combustion supporting property; and (2)conveying the mixture into a combustor, spraying the mixture from a nozzle of the combustor, enabling the mixture to be in contact with fuel for combustion, and condensing to obtain the spherical metal mineral powder. According to the method, bonding and aggregation among metal ore particles can be prevented in the melting process, the particle size of the metal ore powder is remarkably reduced,the spheroidization rate and the spheroidization degree of the metal ore powder are improved, and the prepared spherical metal ore powder can be used as a weighting agent to be applied to the fields of cement paste, spacer fluid, drilling fluid and the like.

The invention relates to a liquid-phase hydrogenation reactor and a hydrogenation process, the liquid-phase hydrogenation reactor comprises an inner cylinder and a reactor shell, the inner cylinder is conical, the top and the bottom of the inner cylinder are open, the edge of the bottom of the inner cylinder is hermetically connected with the inner wall of the reactor, and a plurality of small holes are formed in the wall of the inner cylinder; a ceramic membrane tube bundle is vertically arranged in the axial direction of the reactor and is communicated with external hydrogen; the inner cylinder is filled with a hydrogenation catalyst I, the annular cavity is filled with a hydrogenation catalyst II, and the activity of the hydrogenation catalyst I is higher than that of the hydrogenation catalyst II; the reactor raw material inlet communicates with the top of the inner cylinder; the materials flow in the inner cylinder from top to bottom; the materials flow in the annular cavity from top to bottom. According to the method, the contact time of the material and the catalyst in the whole hydrogenation reaction process can be effectively controlled, so that the temperature rise of a catalyst bed layer is more uniform, the problems of severe heat release and reaction conversion rate inhibition in the reaction process are solved, and higher hydrogenation reaction rate and conversion rate in the whole liquid-phase hydrogenation reaction process are achieved.

The invention relates to a regenerative circulating filtration system. The regenerative circulating filtration system at least comprises two or more material washing devices and an activated carbon regeneration unit which are communicated in sequence; inlet water flows through the material washing devices in sequence to be subjected to circulating filtration treatment, activated carbon flows through the material washing devices in sequence and enters the activated carbon regeneration unit to be regenerated, and the activated carbon regeneration unit at least comprises an aeration part in a shell; the aeration part is configured to conduct first-stage regeneration treatment on the activated carbon in the following modes that the aeration part forms multiple gaps for receiving the activatedcarbon according to a filter material stacking mode, and the activated carbon moves in the gaps to be regenerated.

The invention discloses a heavy oil hydrogenation reactor and a hydrogenation method. The reactor comprises a reactor outer cylinder, an inner cylinder I and an inner cylinder II, the inner cylinder I and the inner cylinder II are arranged in the axial direction of the reactor, the cross sectional area of the inner cylinder I is gradually reduced from top to bottom, and the cross sectional area of the inner cylinder II is gradually increased from top to bottom; an annular space is formed among the inner cylinder I, the inner cylinder II and the reactor outer cylinder body; wherein the inner cylinder I is filled with a hydrogenation catalyst I, the annular space is filled with a hydrogenation catalyst II, and the activity of the hydrogenation catalyst I is higher than that of the hydrogenation catalyst II. The viscosity of the material is reduced through the viscosity reduction assembly arranged in the inner cylinder II, and then the material sequentially passes through the inner cylinder I and the annular space to generate hydrogenation reaction, so that the mass transfer process driving force and reaction rate of heavy oil liquid phase hydrogenation reaction are improved, the contact time of the reaction material and different active catalysts is controlled, and catalyst surface coking is slowed down; the deep cracking reaction of the light oil is reduced, and the liquid yield and the heavy impurity removal conversion rate in the heavy oil liquid phase hydrogenation reaction process are improved.

The invention discloses a hydrogenation reactor and a hydrogenation method thereof. The hydrogenation reactor comprises an inner cylinder and a reactor shell, the inner cylinder is conical, and an annular space is formed between the inner cylinder and the reactor shell; the edge of the bottom of the inner cylinder is connected with the inner wall of the reactor in a sealed manner; the inner cylinder is filled with a hydrogenation catalyst I, the annular space is filled with a hydrogenation catalyst II, and the activity of the hydrogenation catalyst I is higher than that of the hydrogenation catalyst II; a hydrogen supplementing assembly is horizontally arranged in the reactor; a reactor raw material inlet is communicated with the bottom of the inner cylinder; a reactor product outlet is communicated with the lower part of the annular space; the material flows in the inner cylinder from bottom to top; and the material flows in the annular space from top to bottom. The method can effectively control the contact time of the material and different active catalysts in different temperature sections in the hydrogenation reaction, realizes the purposes of rapid reaction in low and medium temperature sections and inhibition of side reaction in high temperature sections, and improves the hydrogenation reaction rate and reaction depth.

The invention belongs to the technical field of medicinal oil refining, and discloses a method for accurately controlling the content of stearic acid in soybean oil by using a mixed filler. The methodcomprises the following steps: A. physically and uniformly mixing lipase, inorganic base, a filter aid and an adsorbent to form a mixed filler, the lipase being Sn-1, 3-site specific lipase; B, enabling soybean oil to flow through the mixed filler to obtain refined soybean oil. The method solves the problems that the stearic acid content cannot be accurately controlled and the requirement for preparing a high-quality fat emulsion preparation cannot be met in the traditional soybean oil production process.

The invention belongs to the field of fuel cells and hydrogen production, provides a hydrogen production device, system and method for controlling the hydrogen production rate of a fuel cell, and solves the problems that the utilization rate of water in the system is reduced, the starting rate is slow, and the hydrogen production rate cannot be accurately controlled. According to the technical scheme, a water storage tank and a hydrogen production tank are connected in the mode that a pump or a pipe is filled with a wick, liquid water or steam slowly enters a system through an active matter filling tank hole, the good contact rate with active matter is kept in the process, and hydrogen is released; the surface of the water recovery tank is hollowed out to control the outflow rate of water and indirectly control the contact time with active substances; each space in the hydrogen production device can be filled with one or more water absorbing materials in advance, so that the stability of the reaction process rate is improved.

The invention provides a method for transferring polymer particles among gas-phase polymerization reactors, which is used for two or more gas-phase polymerization reactors connected in series, wherein the two or more gas-phase polymerization reactors connected in series continuously polymerize a polymer monomer or a mixture thereof, and each reactor contains a particle-quenching micro-fluidized bed for the polymer monomer. The transferring method shortens the cycle, simplifies the process and can effectively improve the transfer efficiency and the purification efficiency.

The invention discloses a green synthesis device of 4-chloroacetoacetate. The synthesis device comprises a sealed thermal insulation shell; an electro-conductive barrel is arranged in the thermal insulation shell; the upper end and lower end of the electro-conductive barrel are hermetically and fixedly connected with the upper side and lower side of the inner cavity of the thermal insulation shellrespectively; an electrostatic generator is arranged outside the thermal insulation shell, the output end of the electrostatic generator is connected with the side face of the electro-conductive barrel through a cable, the cable penetrates through the thermal insulation shell, an electrostatic sprayer is arranged in the upper portion of the inner cavity of the electro-conductive barrel, and a pre-cooler is installed outside the electro-conductive barrel. The green synthesis device atomizes a diketene solution through static electricity, the contact area between liquid drops of the diketene solution and chlorine is increased, the time of reactions between the liquid drops of the diketene solution and chlorine is determined by the downward moving distance of the liquid drops of the diketenesolution, the time of reactions between the diketene solution and chlorine is convenient to control, byproducts are reduced, and raw material loss is avoided.

The invention provides a cooking utensil and a control method and device thereof. The control method comprises the following steps that it is recognized that the water temperature in the cooking utensil is within a preset cooking temperature interval; and according to the preset cooking temperature interval, the preset contact time of food materials in the cooking utensil and water is controlled, so that the cooking utensil can control the contact time of the food materials and the water, and the sugar content in the rice is further reduced.