44results about How to "Reduce coking" patented technology

The invention relates to the technical field of activated carbon processing, and discloses catalyst activated carbon activation processing equipment and a using method thereof.The catalyst activated carbon activation processing equipment comprises a main body, a plurality of heating rods are fixedly connected to the interior of the main body, an inner cylinder is fixedly connected to the interior of the main body, a catalyst storage box is fixedly connected to the top of the inner cylinder, and a feeding port is formed in the top of the inner cylinder; and a discharging pipe is arranged at the bottom of the inner cylinder. The hollow gear shaft drives mixed materials to turn over and stir during rotation, and the situation of local accumulation among the materials is broken through in combination with vertical shaking of the two ends of the arc-shaped elastic plate, so that the materials are more fully mixed in the inner cylinder, and the material mixing uniformity is greatly improved; and the mixed material and the activation medium are in better contact, so that the mixing uniformity is improved.

The invention discloses a high-valued comprehensive utilization method of a waste battery diaphragm. The method comprises the following steps: S1, mixing and filtering the waste battery diaphragm and titanium white waste acid to obtain filtrate and a pretreated battery diaphragm in which part of an aluminum oxide coating is removed; wherein the pretreated battery diaphragm is subjected to catalytic pyrolysis, and aromatic hydrocarbon and solid carbon are obtained; s2, the filtrate is subjected to oxidation, polymerization and curing in sequence, and polyaluminum ferric sulfate is obtained.By means of the method, the waste battery diaphragm can be efficiently recycled, and titanium dioxide waste acid is fully purified and utilized. The method can realize selective preparation of aromatic hydrocarbon by catalytic pyrolysis of the waste battery diaphragm, can also comprehensively utilize the main component ferrous sulfate of the titanium dioxide waste acid to obtain polyaluminum ferric sulfate, can also obtain the coating material aluminum oxide of the waste battery diaphragm, and is a feasible and efficient method for realizing high-value utilization of the waste battery diaphragm and the titanium dioxide waste acid.

The invention discloses a catalyst for preparing phenol and guaiacol through lignin depolymerization as well as a preparation method and application of the catalyst. The catalyst comprises a carrier and active components loaded on the carrier, the carrier is activated carbon, and the active components are molybdenum, cobalt and ruthenium. The catalyst is applied to catalytic depolymerization of lignin to prepare phenol and guaiacol, 100% lignin conversion rate can be achieved in an absolute ethyl alcohol solvent in a nitrogen atmosphere under the condition that no extra hydrogen source is needed, the phenol yield is larger than 10%, the guaiacol yield is larger than 25%, the depolymerization capacity and selectivity of the catalyst to lignin can be improved, and the catalyst can be applied to preparation of phenol and guaiacol. Good industrial application prospects are realized.

The present invention relates to a method for preparing low-carbon olefin raw materials by selective desulfurization and denitrogenation of diesel, wherein the diesel raw material oil is contacted with a selectively regulated hydrofining catalyst for hydrofining reaction, and the obtained refined oil is subjected to solvent extraction to obtain extracted oil rich in aromatics and raffinate oil rich in alkanes; wherein the raffinate oil is used as a high-quality raw material for steam cracking to produce ethylene, and the extracted oil can be directly used as a raw material for hydrocracking or catalytic cracking to produce high-octane gasoline or BTX light components. The present invention optimizes the raw materials and process structure of the existing device, not only fully utilizes various raw material resources, but also effectively solves the problem of diesel outlet and ethylene material shortage.

The invention discloses a protective agent for lung injury caused by intestinal ischemia reperfusion, and relates to the technical field of lung injury protective agents. The method comprises the following steps: step a: a synthesis step: S1, a purification process of tripterine: stirring an obtained concentrated solution with silica gel, fully mixing the silica gel and the concentrated solution, and drying into dispersed particles to obtain a granular raw material for later use; verification is carried out by establishing a cell model and a biological model, lung cell coking can be effectively relieved, the lung can be protected against oxidative stress injury, when the biological model is modeled, an intestinal ischemia reperfusion injury model is established for a mouse by utilizing an active modeling operation, clinical lung injury conditions are simulated, and the model is used for simulating the lung injury condition. The tripterine derivative is given through oral administration or intravenous injection, and it is verified that the tripterine derivative has the effects of inhibiting lung cell coking, preventing cells from releasing histidine and various inflammatory mediators and avoiding further aggravation of inflammatory response and cell damage.

The invention provides a method for co-processing and recycling three wastes of an incineration power plant, and belongs to the technical field of treatment and recycling of the three wastes. According to the method, heavy metals and soluble chlorine salts in the fly ash are eluted by utilizing the leachate, the fly ash is subjected to low-temperature pyrohydrolysis by adopting an anaerobic environment provided by the flue gas, dioxin in the fly ash and the flue gas is degraded, and residual heavy metals and soluble chlorine salts in the fly ash are deeply eluted by utilizing the leachate again; fly ash is subjected to wet mineralization through CO2 in flue gas, heavy metal in eluent is precipitated and separated through the CO2 in the flue gas, and KCl and NaCl in concentrated eluent are recycled through membrane filtration and membrane evaporation technologies. The three-waste landfill leachate generated in the production process of the waste incineration power plant, the household waste incineration fly ash and the flue gas are subjected to collaborative harmless treatment and resource utilization, and the problems of high-salinity wastewater and solid waste resource utilization and flue gas deep decarburization are creatively solved.

The invention relates to a quench cooler electric decoking device and an electric decoking process, and belongs to the field of petrochemical engineering, the quench cooler electric decoking device comprises a current conversion controller, an input electrode, an output electrode, an input detection electrode, an output detection electrode, a detector and a pulse power supply. The input electrode and the input detection electrode are connected to the inlet end of a furnace tube of the quench cooler, the output electrode and the output detection electrode are connected to the outlet end of the furnace tube of the quench cooler, and the detector is connected with the input detection electrode and the output detection electrode. The current conversion controller loads set voltage and current to the two ends of the quench cooler furnace tube through the input electrode and the output electrode, and an electromagnetic field is formed in the quench cooler furnace tube; the flow direction of the reaction material in the furnace tube of the quench cooler is the same as the flow direction of the current; and the input detection electrode and the output detection electrode are used for detecting voltages at two ends of the furnace tube of the quench cooler in real time. The method improves the decoking effect, is suitable for decoking and oxygen-containing flue gas purification at high temperature, and prolongs the operation cycle of the quench cooler.

The invention discloses a vacuum flash tower based on vacuum deep distillation and a crude oil processing system and method, and belongs to the technical field of petroleum refining. According to the method, vacuum residue at the bottom of a vacuum tower is subjected to secondary flash evaporation by additionally arranging a vacuum flash evaporation tower, and light components (mainly wax oil) in the vacuum residue are further recovered. The vacuum flash tower adopts a combined design of an upper packed tower section and a lower plate tower section, the packed tower section is used for absorbing light components, and the plate tower section is used for prolonging the residence time of residual oil. And part of vacuum third-line wax oil extracted from the side line of the vacuum tower enters the top of the flash tower as an absorbent, absorbs flash light components and then is refined back to the vacuum tower, so that the product quality is ensured. The vacuum flash tower and the vacuum tower share a vacuum system, and the tower pressure is maintained at 4 kPa. According to the method, the vacuum residue extraction rate is remarkably increased, vacuum equipment does not need to be additionally arranged, the problem that light-component metal and residual carbon exceed the standard in a traditional process is solved, and economic benefits are remarkable. The method is suitable for heavy crude oil processing and has the advantages of low equipment investment, simple operation and the like.

The invention discloses a chlorine-containing pyrolysis oil radial moving bed reaction adsorption dechlorination hydro-conversion method, and belongs to the technical field of chlorine-containing oil product hydrotreatment and refining. According to the method, chlorine-containing pyrolytic oil is sequentially subjected to fixed bed selective hydrogenation, radial moving bed reaction adsorption dechlorination and fixed bed deep hydrofining reactor treatment; the radial moving bed is filled with a core-shell structure reaction and adsorption integrated catalyst, the core is a hydrodechlorination active component, the shell mainly adopts zinc oxide to adsorb HCl and is fixed in situ, and meanwhile, online addition and discharge of the catalyst are realized through the radial moving bed. According to the invention, poisoning of chlorine to the catalyst is effectively inhibited, the corrosion risk of equipment is reduced, shutdown of the device is avoided, the dechlorination efficiency is improved, the continuous operation period is prolonged, efficient, stable and economical hydro-conversion of the chlorine-containing pyrolytic oil is realized, and the obtained product can be used as clean fuel oil or a chemical raw material.

An epoxy resin composition containing an epoxy resin (A) and an epoxy resin curing agent (B), the epoxy resin (A) containing an epoxy resin (A1) having a glycidyl group derived from resorcinol and an epoxy resin (A2), which is an epoxy resin having a glycidyl group derived from bisphenol F, or the like, and the epoxy resin curing agent (B) containing resorcinol (B1) or the like, the content of the epoxy resin curing agent (B) is 7-60 mass%.

The present invention discloses an alkylation method, which comprises contacting an alkylable substance, an alkylating agent and an alkylation catalyst under alkylation reaction conditions to carry out an alkylation reaction, wherein the alkylation catalyst contains a solid acid and a transition metal and the transition metal exists in an oxidized state. The method can reduce the processing steps of the alkylation catalyst, reduce the production cost of the catalyst and increase the single cycle life of the alkylation catalyst.

The utility model discloses boiling equipment for processing pyretic moxibustion health-care paste, which comprises a boiling mechanism, a stirring mechanism is mounted at the top of the boiling mechanism, and a reciprocating driving mechanism is arranged on one side of the boiling mechanism; the boiling mechanism comprises a saucepan, a rotating rod is installed on the surface of the saucepan, and a support is rotationally connected to the rotating rod; the reciprocating driving mechanism comprises a fixing frame, the fixing frame is installed on the surface of the support, a second gear motor is fixedly installed on one side of the fixing frame, an output shaft of the second gear motor is sleeved with an eccentric connecting piece, and the front end of the eccentric connecting piece is rotationally connected with a rotating rod. The boiling equipment has the advantage of being good in extraction effect, and the problems that in the using process of existing boiling equipment for processing the pyretic moxibustion health-care cream, shaking is not convenient while medicinal materials are stirred, the separation speed of effective components of the medicinal materials is reduced, the extraction time of the medicinal materials is prolonged, and the phenomenon that the medicinal materials are coked due to local overheating easily occurs are solved.

The present invention relates to the technical field of liquid desulfurization slag remover, and specifically discloses a high-efficiency liquid desulfurization slag remover, wherein the raw materials include by mass: 5-15 parts of limestone powder, 0.1-1 parts of catalyst, 20-25 parts of oleic acid, 1-3 parts of sodium hydroxide, 0.1-1 parts of yttrium chloride, 0.0403-0.1550 parts of sodium fluoride, 0.0131-0.3830 parts of sodium dichromate, 1-3 parts of ethylenediamine, 2-5 parts of methyl acrylate, 5-15 parts of sodium tripolyphosphate, and 20-35 parts of sodium chlorite. The present invention also discloses a preparation method of the above-mentioned high-efficiency liquid desulfurization slag remover. The present invention has no odor, no irritating smell, and no polluting components to the body and the environment; it is not easy to block the nozzle, and it can not only effectively remove the slag body in the softened dust in the smoke, prevent coking, effectively reduce energy consumption and cost, and significantly improve the efficiency of the entire desulfurization system.

The invention discloses a catalyst for preparing cyclohexane through hydrodepolymerization of lignin as well as a preparation method and application of the catalyst. The catalyst comprises a carrier and active components loaded on the carrier, the carrier is kaolin, and the active components are nickel and ruthenium. The catalyst can be applied to preparation of cyclohexane through catalytic hydrogenation depolymerization of lignin, 100% conversion of lignin can be achieved in an absolute ethyl alcohol solvent only in the initial hydrogen atmosphere, the yield of cyclohexane monomers is larger than 20%, conversion from lignin to hydrocarbon fuel in one step is completed, and the catalyst is suitable for industrial production. The preparation and reaction processes of the catalyst have the characteristics of high efficiency, greenness, economy and reproducibility, and the industrial application prospect is wide.

The embodiment of the utility model relates to an assembly type boiler air pre-heater anti-blocking device, and belongs to the technical field of boiler environmental protection. The assembled boiler air pre-heater anti-blocking device comprises a reheat steam main pipe, the reheat steam main pipe is sequentially connected with a primary air bellow and a primary air main pipe, and first reheaters are arranged in the primary air bellow and the primary air main pipe; the primary air mother pipe is connected with an air feeder, a second reheater is arranged in an outlet air box of the air feeder, the air feeder is further connected with a body drain flash tank of the steam turbine, and the body drain flash tank is connected with a condenser. According to the anti-blocking device provided by the embodiment of the invention, the air pre-heater is prevented from being blocked by ammonium hydrogen sulfate, the differential pressure of the air pre-heater is controlled, the input rate of a soot blower is reduced, steam is saved, and the service life of the air pre-heater is prolonged.

According to the solid-containing oil product separation and purification process and the separation and purification process system provided by the invention, the solid-containing oil product is treated by adopting the scheme of the invention, so that materials can be effectively separated, and the solid content in the separated clear liquid is reduced. The process comprises the following steps: (1) mixing and dissolving a solid-containing oil product and a composite solvent in a dissolving unit to obtain a dissolved material, the composite solvent comprising wash oil and light oil with a distillation range of 200-300 DEG C; (2) feeding the dissolved material into a centrifugal device of a separation unit, and centrifuging to obtain a centrifugal clear liquid and a centrifugal dry phase; the centrifugal clear liquid is fed into a filtering device of the separation unit to be filtered, and filtered clear liquid and concentrated liquid are obtained; and (3) carrying out flash evaporation treatment on the filtered clear liquid and the concentrated liquid in a flash evaporation unit respectively as flash evaporation feed liquid.

The invention discloses a waste wind power lubricating oil hydrogenation catalyst, a preparation method and its application in waste wind power lubricating oil regeneration base oil, belonging to the technical field of waste wind power lubricating oil regeneration. The catalyst is a shell-type Pd@γ‑Al 2 O 3 Catalyst. The use of the catalyst in the regeneration of base oil from waste wind power lubricating oil comprises: subjecting the waste wind power lubricating oil to a vacuum distillation and a low-temperature short-range critical molecular distillation in sequence to obtain a crude base oil; adding the crude base oil and the catalyst to a reactor for kettle-type hydrogenation and quality improvement to obtain a regenerated base oil. The present invention adopts a low-temperature short-range critical molecular distillation combined with kettle-type hydrogenation refining and quality improvement, which is simple to prepare and not easy to be poisoned. It can effectively reduce the coking and scaling problems of waste wind power lubricating oil on the inner wall of the evaporator, and can greatly extend the working time of the device. Shell-type Pd@γ‑Al 2 O 3 The catalyst can greatly reduce the amount of Pd used, improve the Pd dispersion and atomic utilization, and enhance the hydrogenation effect.

This invention relates to a biomass gasification system and method with dust removal function, including a gasifier, a burner, a raw material supply module, and a dust collection device. The raw material supply module is used to transport pulverized green waste or other biomass raw materials to the gasifier for gasification to generate biomass fuel gas. The inlet of the dust collection device is located near the outlet of the raw material supply module, and is used to extract dust entrained during the process of the raw material falling into the gasifier. The dust includes sawdust, glue fragments, and other lightweight combustible particles. The outlet of the dust collection device is connected to the oxygen supply path of the burner, and is used to introduce the dust into the burner to mix and burn with the biomass fuel gas. This invention, by constructing a closed-loop path of "dust extraction-reburning," can significantly reduce coking in the gasifier, improve gasification efficiency and burner temperature rise rate, achieve efficient recovery and utilization of dust energy, and enhance the overall operational stability and thermal output efficiency of the system.

The present disclosure relates to a method and system for hydrogenating heavy crude oil in a liquid non-hydrogenated slurry bed, the method comprising: mixing crude oil, catalyst and hydrogen supply agent and entering into a slurry bed reactor for hydrogen transfer reaction to obtain hydrogen transfer reaction products; the hydrogen transfer reaction products are subjected to a first separation to obtain gas phase light components, mixed light oil, heavy oil products and unconverted oil containing catalyst; a portion of the unconverted oil is returned to the slurry bed reactor for further reaction; the mixed light oil is subjected to a second separation to obtain product light oil and a hydrogen supply agent to be produced. The method disclosed in the present disclosure can reduce coking and reduce the pressure of the reaction system, thereby improving the safety, reliability and long-term operation of the device.

The application discloses a product separation method of phenylenediamine prepared by a phenol hydroxylation method, which comprises the following steps: (1) sending the phenol hydroxylation reaction liquid into a vacuum dehydration tower for dehydration; (2) sending the mixture in the tower kettle of the vacuum dehydration tower into a thin film scraped blade evaporator for coke removal; (3) sending the gas phase mixture collected from the top of the thin film scraped blade evaporator into a phenol removal tower, and separating phenol; (4) sending the mixture in the tower kettle of the phenol removal tower into an o-phenylenediamine rectification tower for product refining, and separating o-phenylenediamine; (5) washing, filtering and removing coke from the p-phenylenediamine crude product solution in the tower kettle of the o-phenylenediamine rectification tower; and (6) decolorizing and crystallizing the p-phenylenediamine solution after the coke removal, and obtaining p-phenylenediamine. By means of the above-mentioned synergistic effect, the phenol hydroxylation reaction liquid is efficiently and high-quality separated.

The invention discloses a reactor for treating low-value waste plastics. The reactor comprises an outer cylinder, an inner cylinder and a remote control module, an inner cylinder with sieve pores is sleeved in the outer cylinder; the two ends of the outer cylinder and the two ends of the inner cylinder are connected through end covers and bolts at the two ends of the outer cylinder. A feeding hole, a slag outlet and an exhaust hole are respectively formed in the outer cylinder; the inner wall of the outer cylinder is connected with a clamping groove in the outer wall of the inner cylinder through a partition plate on the outer cylinder to form a pyrolysis section; a feeding rod with a cleaning part is arranged on the inner wall of the inner cylinder in the radial direction; the two ends of the feeding rod are connected with flanges at the two ends of the outer cylinder through bearing seats; a bearing seat at one end of the feeding rod is connected with a driving unit; the driving unit is wirelessly connected with the remote control module; according to the reactor, continuous and stable plastic pyrolysis treatment can be realized, low-value plastic is converted into available petrochemical energy, and energy conservation, consumption reduction, environmental protection and income creation are realized.

The invention relates to the technical field of DCS systems, and provides an air and smoke integrated control system and method based on different DCS systems, the air and smoke integrated control system comprises an induced draft fan and a booster fan, the system realizes data communication between a desulfurization DCS and a host DCS system through a communication technology, logic operation is performed in the host DCS system, and related equipment is controlled. By means of the technical scheme, the problems that in the prior art, a boiler is insufficient in combustion, cokes and is large in power consumption are solved.

The utility model discloses a distillation and purification device for triethyl orthoformate. Comprising a bottom plate, a bearing block fixedly connected to the upper end of the bottom plate, a distillation still fixedly connected to the upper end of the bearing block, a groove body formed in the peripheral wall of the distillation still in a penetrating mode, a sliding door hinged to the inner wall of the groove body, a feeding assembly arranged on the peripheral wall of the distillation still, a steam output assembly arranged at the upper end of the distillation still and a discharging assembly arranged at the lower end of the distillation still. The first bearing ring is fixedly connected to the middle part of the inner wall of the distillation kettle; the movable ring is placed at the upper end of the first bearing ring; the fixed cylinder is arranged on the inner wall of the movable ring in a sliding manner; the separation cylinder is fixedly connected to the lower end of the movable ring; the guide cylinder is fixedly connected to the upper end of the fixed cylinder; the air guide assembly is arranged at the upper part of the inner wall of the distillation kettle. The utility model has the advantages that the internal airflow can be actively guided and adjusted, the mass and heat transfer efficiency is high, and the cleaning and maintenance are convenient.

This invention discloses a method for preparing high-quality tire oil through catalytic pyrolysis of waste tires. The method uses a eutectic solvent formed by choline chloride and ferric chloride hexahydrate as a low-temperature phase change medium, which functions as a heat carrier, swelling agent, catalyst, and sulfur capture agent. Waste tire rubber powder is mixed with this medium, and a low-temperature swelling and pyrolysis desulfurization reaction is carried out under an inert atmosphere. The Lewis acidity of iron ions in the medium preferentially breaks the C-S and S-S bonds in the rubber crosslinking bonds. The sulfur-containing active species generated by the breakage are captured in situ as inorganic sulfides and retained in the liquid phase. The escaped oil vapor is condensed to directly obtain ultra-low sulfur, light-colored, transparent, high-quality tire oil. The used medium can be oxidized and regenerated by introducing air under heating conditions, and the sulfur is recovered in the form of elemental sulfur, allowing the medium to be recycled. This invention achieves synergistic unity of low-temperature pyrolysis and deep desulfurization at the source, with a simple process flow that is economical and environmentally friendly.

The invention relates to a method and system for producing ethylene and propylene from heavy oil, and the method comprises the following steps: introducing heavy hydrocarbon oil into a supercritical extraction separation unit for supercritical extraction separation to respectively obtain light deasphalted oil, heavy deasphalted oil and deoiled asphalt; carrying out hydrotreating on the deoiled asphalt to obtain hydrogenated deoiled asphalt; introducing the heavy deasphalted oil and the hydrogenated deoiled asphalt into a first reactor to be in contact with a first catalytic conversion catalyst for a first catalytic conversion reaction; introducing the light deasphalted oil into a second reactor to contact with a second catalytic conversion catalyst for a second catalytic conversion reaction; wherein the first catalytic conversion catalyst and the second catalytic conversion catalyst contain MPZ hierarchical pore molecular sieves. According to the method disclosed by the invention, polycyclic aromatic hydrocarbon which is not easy to react can be saturated, the cracking property of the deoiled asphalt is improved, the generation of coke is reduced, and the yields of ethylene and propylene are improved.

The invention relates to a combustion system for a washing powder preparation process and a control method of the combustion system, and relates to the technical field of combustors, the combustion system comprises a fuel combustion structure, a feeding structure and a deslagging structure, and the feeding structure and the deslagging structure are arranged at the two ends of the fuel combustion structure respectively; the combustion system further comprises a gas combustion structure, a water cooling structure, a steam generation structure, a gas mixing structure, a monitoring mechanism and a regulation and control mechanism, the fuel combustion structure communicates with the gas combustion structure, the gas combustion structure communicates with the steam generation structure and the gas mixing structure, and the monitoring mechanism is used for monitoring the temperature and pressure of the combustion system. The regulation and control mechanism is used for regulating the air inlet amount, the hot air flux and the air outlet amount, and the water cooling structure is arranged in the fuel combustion structure and externally connected with a water storage tank. The device has the advantages that under the negative pressure environment, biomass powder is combusted more sufficiently, environment-friendly emission is achieved, and large-batch hot air, hot water and steam can be provided for washing powder manufacturers at the same time at low cost.

The invention relates to the technical field of settlers, and particularly discloses a rapid oil-gas separation assembly for reducing coking of a settler in a catalytic reactor, the interior of the settler body is sequentially provided with a first partition plate, a second partition plate and a third partition plate from top to bottom, the interior of the device body is sequentially divided into a first gas collecting chamber, a second gas collecting chamber, a containing cavity and a material collecting chamber from top to bottom through a first partition plate, a second partition plate and a third partition plate; a cleaning mechanism is mounted in the material collecting chamber; the device further comprises a first air inducing assembly and a second air inducing assembly. On one hand, the coarse cyclone separator is matched with the single-cyclone separator, so that oil and gas can be subjected to multi-stage separation; on the other hand, the oil gas in the material collecting chamber can flow into the coarse cyclone separator through the air inducing pipeline and the air pipe to be separated again, so that accumulation of the oil gas in the material collecting chamber is reduced, and the situation of coking in the material collecting chamber is reduced.

A method for producing mesophase bitumen, the method comprising: providing a raw material having a T5 ≥ 400°F (204°C) and a T95 ≤ 1,400°F (760°C); heating the raw material at a temperature of at least 450°C to produce a heat-treated product comprising mesophase bitumen, wherein the heating is carried out under reaction conditions sufficient to have an equivalent reaction time of greater than or equal to 1,000 seconds; and recovering the mesophase bitumen.

The invention discloses a catalyst for dehydrogenation of light hydrocarbons and a supporting process thereof, comprising the following steps: reacting an aluminum organic metal skeleton with polyethyleneimine at high temperature in a nitrogen atmosphere to generate foamed aluminum; generating an iron-nickel bimetallic organic skeleton in situ on the surface of the foamed aluminum to obtain loaded foamed aluminum; impregnating the loaded foamed aluminum with a stannous chloride ethanol solution, oxidizing the loaded foamed aluminum in air at high temperature after the reaction, and reducing it in hydrogen to obtain a catalyst for dehydrogenation of light hydrocarbons; and carrying out a light hydrocarbon dehydrogenation process in a fixed bed reactor using the catalyst for dehydrogenation of light hydrocarbons. The process of the invention improves the selectivity of isobutylene by introducing tin metal into a nickel-based catalyst through improving the catalyst, vitrifying the metal organic skeleton through high temperature, dispersing and fixing nickel metal and tin metal on the surface of a foamed alumina carrier, and has a large catalytic area, firm metal bonding, a long catalyst life, and is not easy to lose.

The utility model discloses a plasticizing unit of a screw extruder, and particularly relates to the field of screw extruders, which comprises a shell, one end of the shell is connected with a driving box, the top of the shell is provided with a feed hopper and a liquid supplementing pipe, the middle wall body of the shell is fixedly connected with a heat conducting plate, and the outer surface of the shell is fixedly connected with a heat insulating plate. The outer surface of the heat conduction plate is sleeved with a plurality of electric heating ring plates and heat conduction rings, and temperature sensors are arranged at the tops of the heat conduction rings. According to the utility model, the electric heating box is used for controlling the electric heating tube and the electric heating ring plate to heat simultaneously, so that raw materials between the screw rod and the shell can be heated simultaneously from inside to outside, the raw materials are heated uniformly, the heating rate of the raw materials is improved, and the plasticizing efficiency of the raw materials is improved; the screw is heated by the electric heating tube, and raw materials are indirectly heated, so that coking caused by high temperature due to direct contact with the raw materials can be reduced, and the working efficiency and the output quality are improved.