21results about How to "Avoid coking" patented technology

The invention provides a method for synthesizing 6-aminocapronitrile from caprolactam. The method comprises the following steps: a gasification device is sequentially provided with a uniform distribution part, an efficient dispersion part, a high-temperature gasification part and an in-situ separation part from top to bottom; liquid-phase caprolactam is injected from the top end of the gasification device, and ammonia gas is injected through the efficient dispersion part; in the efficient dispersion part, liquid-phase caprolactam is broken in a first circular tube nest under the shearing action of gravity and ammonia gas to form liquid drops, and after high-temperature gasification, a gas phase is output from the side part of the gasification device, then enters the reactor filled with the monolithic catalyst from the bottom of the reactor, reacts through the monolithic catalyst and is output from the top of the reactor. According to the invention, caprolactam can be efficiently gasified, coking is not easy to generate, the retention time of a gas-phase reactant in the reactor can be accurately controlled, the reaction efficiency is greatly improved, the discharge amount of wastes in the production process of hexamethylenediamine is reduced, the cost is reduced, the economic benefit is improved, and a guarantee is provided for green, environment-friendly and safe production.

The utility model relates to an oil-gas separator assembly which comprises a separator outer barrel, a flange barrel cover and an oil-gas filtering assembly arranged in the separator outer barrel, the oil-gas filtering assembly comprises an inner barrel with a barrel opening provided with a flange, and the inner barrel is connected with the separator outer barrel and the flange barrel cover through the flange; a plurality of oil separation core mounting seats for mounting oil separation cores are arranged on a bottom plate of the inner barrel, the oil separation cores are respectively mounted on the oil separation core mounting seats, and inlets of the oil separation cores face downwards and are communicated with the interior of the separator outer barrel; a connecting through hole is further formed in the edge of a bottom plate of the inner barrel, a sunken oil gathering pipe is connected to the connecting through hole, an oil suction pipe is further arranged on the flange barrel cover in a penetrating mode, the inner end of the oil suction pipe extends into the bottom of the oil gathering pipe, and the outer end of the oil suction pipe is sequentially connected with a first one-way valve and an oil return pipe so as to be connected with a vacuum pump main machine through the oil return pipe. The oil-gas separator assembly has the advantages of being convenient to maintain and clean, good in oil-gas separation effect, long in service life, low in maintenance cost and the like.

This invention relates to the field of circulating fluidized bed boiler technology, specifically to an anti-clogging structure for the return feed port of a circulating fluidized bed boiler. This structure employs a high-pressure fluidizing air duct embedded in the return feed channel of the circulating fluidized bed boiler, with the port of the embedded section directly opposite the return feed port area where the return feed channel connects to the furnace of the circulating fluidized bed boiler. A high-pressure fluidizing air source is connected to one end of the high-pressure fluidizing air duct, providing fluidizing air that is blown from the port of the embedded section towards the return feed port area, preventing ash and coking in the return feed port area. By embedding a high-pressure fluidizing air duct at the end of the return feed channel, this invention effectively prevents abrupt changes in material flow characteristics and thermal imbalance at the return feed port during load variations, thus preventing the formation of a coke layer on the inner wall and ultimately causing blockage, which is beneficial for ensuring the normal operation of the boiler.

The utility model relates to evaporation device technical field discloses an evaporation device, including evaporation bin, motor, first elbow pipe etc. Motor is located on evaporation bin upper surface, its rotor sleeve joint conducting ring and coaxial installation rotating rod, and rotating rod is linked with conducting ring. First elbow pipe is located in the bottom end of rotating rod, and the bottom end is connected with second elbow pipe through mounting rod, and the surface of mounting rod evenly is equipped with heating plate. Evaporation bin inner chamber bottom has support frame, and the bottom end of second elbow pipe is installed on support frame through bearing. When the device works, motor drives rotating rod to rotate, and conducting ring makes heating plate rotate and continuously electrifies and heats in rotation, forms dynamic heating. The rotation of heating plate makes liquid material form thin layer liquid film under the centrifugal action, increases the contact area of liquid and heating surface, accelerates heat conduction, and the shear force produced by rotation destroys the surface tension of liquid, promotes liquid update, avoids local overheating coking, and effectively improves the evaporation efficiency of sewage.

This invention discloses a method and system for producing mesophase carbon microspheres. The method involves hydrogenating purified catalytic slurry, followed by separation to obtain light fraction, middle fraction, and tail oil. The middle fraction is divided into two streams: the first stream undergoes cracking, with the cracking products recycled; the second stream undergoes a first heat treatment, and the heat-treated product is pulverized to obtain a solid first feed stream, a first solvent, and silicone oil, which are then subjected to a second heat treatment. The resulting reaction product is then centrifuged, washed, and dried to obtain mesophase carbon microspheres. The production system includes a purification unit, a hydrogenation reaction unit, a gas-liquid separation unit, a fractionation unit, a cracking reaction unit, a first heat treatment unit, and a second heat treatment unit. This invention proposes an optimized approach to preparing mesophase carbon microsphere raw materials, yielding high-quality mesophase pitch raw materials and mesophase carbon microsphere products.

The utility model relates to a chemical industry mechanical equipment field especially, relates to a kind of ester exchange equipment for vegetable oil-based emulsifier production, including tank body, the tank body top is equipped with feed inlet, tank body bottom is equipped with discharge gate, the temperature regulating system is arranged in the tank body;The tank body top is installed with stirring motor, the output shaft of stirring motor is connected with stirring shaft, the stirring shaft is provided with stirring vane, the stirring vane includes the helical stirring vane of top layer, the stirring vane of pulp of middle layer and the anchor stirring vane located in bottom layer;The temperature regulating system includes high temperature layer located at the tank body top, constant temperature layer located at the tank body middle and cooling layer located at the tank body bottom.The ester exchange equipment of the application can reduce the adhesion of material to the inner wall of equipment and stirring device during production, thereby improving the uniformity of material distribution, reaction conversion rate and the quality of final product.

The utility model relates to the technical field of petrochemical engineering, in particular to slurry bed residual oil hydrogenation fractionation equipment which comprises a slurry fractionating tower, a slurry feeding pipe and a hydrogen injection pipe are arranged on the side face of the slurry fractionating tower, the hydrogen injection pipe is located below the slurry feeding pipe, and a hydrogen distributor is arranged in the slurry fractionating tower. And the hydrogen distributor is connected with the hydrogen injection pipe. According to the utility model, hydrogen is uniformly sprayed out, is in uniform contact with materials and gradually rises, so that the temperature of the materials at the bottom of the slurry fractionating tower can be reduced, high-temperature dehydrogenation and polycondensation reaction can be relieved, meanwhile, the inner wall of the tower is purged, slurry coking in slurry reactor residual oil hydrogenation fractionating equipment can be inhibited, and stable and long-term operation of a slurry fractionating system is realized.

The invention relates to a method for catalytically degrading waste plastics in a slurry reactor by molybdenum sulfide. The synthesized catalyst reaches a 50nm level, has high dispersity and can convert polypropylene waste plastics into an oil product with a distillation range of 20-500 DEG C, the yield of the oil product reaches 90%, the conversion rate reaches 100%, and the selectivity on gasoline and diesel components can reach 95%.

This invention belongs to the field of waste incineration fly ash technology, and provides a waste incineration fly ash stabilizing and molding agent, its application, and a method for treating waste incineration fly ash. The agent comprises the following components in parts by weight: 5-8 parts cement, 5-10 parts stabilizing agent, 7-10 parts binder, and 15-18 parts coating agent. The waste incineration fly ash stabilizing and molding agent provided by this invention not only physically adsorbs and chemically binds with washed fly ash, achieving stable bonding without high addition amounts, resulting in molded bodies with excellent cold and hot pressing strength, solving the problems of easy pulverization and dust generation and secondary pollution caused by fly ash during remelting; it also complexes and solidifies with heavy metals in fly ash, achieving heavy metal mineralization; simultaneously, it ensures that the agent can co-combust with fly ash particles, without producing difficult-to-burn residues, avoiding coking and ash accumulation in the furnace, and poses no environmental risk or secondary pollution during use.

This invention discloses a method for reducing the grindability index of raw coke. After the carbonization feed is completed, the heating furnace heat load is maintained, and steam or heavy oil is introduced into the furnace tubes. The heated steam or heavy oil is then sent to the carbonization tower. Simultaneously, the carbonization tower is restored to a slightly positive pressure within 30-60 minutes, and the carbonization reaction temperature of the material is maintained to continue the carbonization reaction. Then, the raw coke exiting the carbonization tower is sent to a carbonization furnace or brick kiln for calcination. This invention, based on the raw coke production process and the principles affecting the grindability index of raw coke, produces raw coke with an adjustable grindability index suitable for manufacturers, reducing the time spent by manufacturers in raw material selection.

The present application relates to heat transfer printing machine technical field, especially to a kind of sealed heating roller and its manufacturing method, including roller, at least one circular is provided in roller, at most four vacuum inner cylinders of cross section are sector, vacuum inner cylinder is evenly distributed along the circumferential direction, at least four groups of heating pipes are installed in roller, heating pipe is installed at the gap between vacuum inner cylinder and vacuum inner cylinder.This application roller is sealed as a whole, uses heating pipe to heat the heat conducting oil in the interior, avoids contact with air, prevents carbon deposition, coking from happening;The design of four vacuum inner cylinders reduces the amount of heat conducting oil, saves cost, at the same time because the amount of heat conducting oil is less, it has the advantages of fast heating and low energy consumption, so that only four heating pipes can meet the heating demand, so that the number of electric heating pipe is less, cost is further reduced, and the probability of roller oil penetration is also reduced;The design of four vacuum inner cylinders can also reduce the sealed roller.

A kind of settler, comprising: settler tank, primary separator and cyclone separator, primary separator and cyclone separator are arranged in settler tank, primary separator includes bend pipe and the down pipe being communicated with bend pipe, the first end of bend pipe is connected with the exit of reactor side wall, the second end of bend pipe is connected with cyclone separator, bend pipe is bent upwards from the connection with reactor side wall.The oil gas and catalyst discharged from reactor enter the bend pipe of primary separator, most of catalyst is discharged through the down pipe of primary separator, and oil gas enters cyclone separator for further gas-solid separation.Oil gas directly into settler is greatly reduced, to avoid coking in settler, on the other hand, reduce the working load of cyclone separator, reduce the loss of catalyst.

The utility model discloses heating reaction equipment for amino paint production, and relates to the technical field of baking paint heating equipment, the heating reaction equipment comprises a heating mechanism and a stirring mechanism, the heating mechanism comprises a heater, a heat conduction oil heating tank, a spiral heat conduction pipe, a circulating pump, a reaction kettle body and an electric heating wire, according to the reaction kettle disclosed by the utility model, materials in the reaction kettle body are uniformly heated in a manner of combining the electric heating wire and heat-conducting oil cyclic heating and arranging the heat-insulating shell on the outer side wall of the reaction kettle body, so that the energy utilization rate is improved, and the problems of non-uniform heating and energy waste are effectively solved; the scraping plate and the extension plate scrape materials attached to the bottom and the side wall of the reaction kettle body while stirring the materials in the reaction kettle body, the situation that the materials are coked due to long-time local heating is avoided, the production quality of amino paint is improved, in addition, through the synergistic effect of the scraping plate, the extension plate and the multiple stirring blades, the raw materials in the reaction kettle body can be fully mixed, and the production efficiency is improved. The reaction efficiency is improved.

The invention provides a C10 recovery device capable of generating steam, and belongs to the technical field of petroleum refining, the C10 recovery device comprises a first feed preheater, a second feed preheater, a C10 cutting tower, a tower top steam generator and a tower top hot water heat exchanger, enabling the raw oil to enter a C10 cutting tower at a preset temperature for separation treatment to form a gaseous light component; the tower top steam generator is connected between the tower top of the C10 cutting tower and the tower top hot water heat exchanger and is used for carrying out secondary condensation treatment on the gaseous light components, low-pressure steam and liquid light components subjected to primary condensation are generated after the light components are subjected to condensation treatment through the tower top steam generator, and the low-pressure steam and the liquid light components are subjected to secondary condensation treatment through the tower top hot water heat exchanger. And condensing the liquid light component through a tower top hot water heat exchanger to generate hot water for heat tracing and a product of C10 and below, wherein the product of C10 and below is output as a reforming raw material in a hot discharge form. According to the invention, the recovery of C10 and below products can be realized.

This invention relates to a method for producing hydrogen from waste edible oils via catalytic cracking. The method involves precipitating and filtering the waste edible oils, then converting them into C1-C5 light hydrocarbons at 350℃-380℃ using a highly active, carbon-resistant, acid-resistant, and water-resistant large-pore hydrodeoxygenation catalyst and a highly efficient n-alkane cracking catalyst. The converted hydrocarbons are then passed through a fine desulfurization reactor and into a light hydrocarbon conversion furnace for cracking to produce hydrogen. Further conversion is performed in a medium-temperature shift converter to increase the yield. Finally, the hydrogen is purified using a PSA purification system to obtain high-purity hydrogen. This method features low reaction temperatures, minimal equipment requirements, and effectively avoids coking during the reaction process. The catalyst structure and synergistic effect of this invention result in high catalytic activity, improved catalytic efficiency, abundant C1-C5 light hydrocarbon components, and higher hydrogen purity.

The utility model provides an adjustable cyclone separator for a coal-fired fluidized bed boiler, which comprises a barrel and an exhaust pipe, a motor is fixedly mounted on the barrel, an output shaft of the motor extends into the barrel and is fixedly provided with a rotating shaft, and two first connecting rods and two second connecting rods are fixedly mounted on the rotating shaft. By starting the motor, the first cleaning brush and the second cleaning brush, fly ash attached to the inner wall can be brushed off in time, ash deposition and scaling are prevented, the interior of the barrel can be kept in a good airflow state, the efficient separation performance of the cyclone separator is maintained, and it is ensured that the dust exhaust concentration of the coal-fired fluidized bed boiler meets the environment-friendly requirement; axial thrust and rotating force can be generated on ash in the discharging pipe, the discharging speed of the ash is increased, the ash is prevented from caking or blocking in the pipe, and it is guaranteed that the ash can be smoothly discharged into a collecting box from the discharging pipe.

The utility model provides an anti-coking device for a settler, which belongs to the technical field of settler plates and comprises an overflow hopper arranged at the lower part of a coarse spinning dipleg and positioned at the inner bottom of the settler; an upper overflow opening is formed in the top end of the overflow hopper, a lower overflow opening is formed in the bottom end of the overflow hopper, and the lower portion of the rough spinning leg extends into the overflow hopper through the upper overflow opening; a superheated steam fluidization ring pipe is arranged at the inner bottom of the overflow hopper, and a nozzle is arranged on the superheated steam fluidization ring pipe; the superheated steam fluidization loop pipe is connected with a steam pipeline, one end of the steam pipeline is connected with the superheated steam fluidization loop pipe, and the other end of the steam pipeline penetrates through the overflow hopper and then is connected with a fluidization steam inlet formed in the upper portion of the settler. Through the measures of reasonable structural design, accurate flow control, wear resistance, condensation prevention and the like, oil gas entrainment can be effectively reduced, catalyst accumulation and coking are prevented, the separation efficiency is improved, the structural strength is high, maintenance is convenient and fast, and the operation cost is reduced.

The utility model belongs to the technical field of large oil-gas line anti-coking devices, and particularly relates to a large oil-gas line anti-coking device of a catalytic cracking reactor. The anti-coking device for the large oil-gas line of the catalytic cracking reactor comprises an inner extending pipe, the inner extending pipe penetrates through the pipe wall of the large oil-gas line, the inner extending pipe is connected with an annular pipe through a flange fastener, the annular pipe is provided with a self-cleaning fan-shaped nozzle, and the annular pipe is fixedly connected to the inner wall of the large oil-gas line through a pipe frame; and outside the large oil-gas line pipeline, the inner extending pipe is connected with a steam pipeline through a steam inlet flange. According to the anti-coking device for the large oil-gas line of the catalytic cracking reactor, the self-cleaning fan-shaped nozzles are arranged, fan-shaped steam is sprayed out to form a protective layer on the inner wall of the large oil-gas line, the flow speed is increased, oil-gas staying is reduced, pressure division and coking prevention are achieved, meanwhile, the device can be arranged in a combined relay mode, and the device is suitable for key coking parts such as elbows and the like. And an anti-backflow check valve and a monitoring pressure gauge are arranged externally, so that the structure is reliable, and the anti-coking effect is good.

The invention discloses an efficient water-cooling direct-discharging ash conveying system which comprises a first flue, a second flue, a third flue, a water-cooling ash hopper, a transition connector, a manual gate valve, an electric double-layer flap valve, an expansion joint and an ash falling pipe. Ash discharging hoppers of a second flue and a third flue of the efficient water-cooling direct-discharging ash conveying system are arranged in a water-cooling mode, namely, water-cooling ash hoppers are arranged, transition connectors are installed at connectors of the water-cooling ash hoppers so that the water-cooling ash hoppers can be in butt joint with manual gate valves conveniently, and the manual gate valves, electric double-layer flap valves, expansion joints and ash falling pipes are sequentially in butt joint through the transition connectors. And finally, the ash is directly conveyed to a flue rear arch burnout section or above a slag well through an ash falling pipe. The method has the advantages that coking of the ash hopper is eradicated fundamentally, the hidden danger of ash blockage of the boiler is eliminated, meanwhile, the problems of blockage of the ash conveying machine and unplanned shutdown of the boiler caused by overload of the ash amount are avoided fundamentally, and long-term safe and stable operation of the boiler is guaranteed.