31results about How to "Reduce temperature and pressure" patented technology

The present invention is directed to a process for hydroprocessing of a liquid hydrocarbon feedstock, comprising: (a) mixing liquid, partially vaporized and/or vaporized hydrocarbon feedstock with molecular hydrogen; (b) feeding said mixture into a compression reactor; (c) compressing said mixture to a pressure, a temperature and for a residence time sufficient to: i) thermally crack at least a portion of hydrocarbon molecules in said hydrocarbon feedstock, and ii) react hydrogen in the presence of a hydrogenation catalyst with unstable portions of the cracked molecules, forming a hydroprocessed product; and (d) expanding said mixture to reduce the pressure and temperature thereby reducing subsequent undesirable reactions.

A pneumatic system 131 for use with gas turbine engines 10 and aircraft 100. The pneumatic system 131 comprises a first engine core compressor bleed offtake in the form of an engine handling bleed offtake 140, and a second engine core compressor bleed offtake in the form of first and second cabin bleed offtake 132, 134, the handling bleed being configured to supply higher pressure air than the cabin offtakes 132, 134. The system 131 comprises a turbocompressor 144 comprising an air compressor 148 driven by a turbine 146. The handling bleed offtake 140 is in fluid communication with the turbocompressor air turbine 146 to thereby drive the air turbine 146, and the cabin bleed offtakes 132, 134 are in fluid communication with the turbocompressor air compressor 148 such that air from the offtakes 132, 134 is compressed by the turbocompressor air compressor 148.

A pressure relief device for a gear box which is disposed in the gear box and comprises a body, a blocking member and a spring. The body is defined with a penetrating hole. The spring pushes the blocking member and makes it seal the penetrating hole. When the pressure rises since the temperature therein is risen, and when the gas pressure in the gear box is larger than the force of the spring, the gas can push the blocking member and compress the spring, and then discharge from the penetrating hole of the body, thus reducing the pressure and the temperature of the gear box.

The present invention is such that, with H1 being the height from a slurry outlet to a control liquid level, H2 being the height from the control liquid level to the top of a flash vessel, and being the diameter of the flash vessel, 0.35D≦H1≦0.45D, and 0.75D≦H2≦0.85D, and at least one liquid level sensor detects a slurry liquid surface at a control liquid level; when the liquid level sensor detects a slurry liquid surface which has risen, a slurry discharge valve installed on a slurry discharge pipe derived from the flash vessel is opened; and when the liquid level sensor detects a slurry liquid surface which has fallen, the slurry discharge valve is closed, whereby opening and closing of the valve is appropriately controlled thereby to reduce troubles with a steam discharge pipe, the slurry discharge pipe, and the slurry discharge valve.

The invention discloses a waste gas post-processing system of a twin-turbo supercharged engine, which belongs to the technical field of engines and is aiming at solving the problem that the three-way catalytic conversion efficiency is low in the prior art. The waste gas post-processing system of a twin-turbo supercharged engine comprises a first gas exhaust manifold and a second gas exhaust manifold, wherein a gas inlet of the first gas exhaust manifold is connected to a waste gas outlet of a first turbo supercharger; a gas inlet of the second gas exhaust manifold is connected to a waste gas outlet of a second turbo supercharger; the gas outlet of the first gas exhaust manifold and the gas outlet of the second gas exhaust manifold are connected to a three-way catalyst; a meeting chamber is arranged among the gas outlet of the first gas exhaust manifold and the gas outlet of the second gas exhaust manifold and the three-way catalyst; the gas outlets of the first gas exhaust manifold and the second gas exhaust manifold are connected to the meeting chamber after being converged; and the meeting chamber is connected to the catalyst. The waste gas post-processing system of a twin-turbo supercharged engine disclosed by the invention is used for processing the waste gas produced by an engine.

The invention provides a preparation method of p-chlorophenylglycine, which comprises the following steps: adding a mixed solution of a chloroform solution, a catalyst and p-chlorobenzaldehyde into asodium hydroxide solution, mixing, and dropwisely adding liquid ammonia while stirring for 2-6 hours; after finishing dropwise adding the liquid ammonia, adding an ammonium bicarbonate solution, and reacting for 5-10 hours at room temperature; after the reaction is finished, distilling and concentrating a reaction solution, decolorizing and filtering by using activated carbon, adjusting the pH value of a filtrate to 6.0 by using an inorganic acid, cooling and filtering to obtain a crude product and mother liquor, washing the crude product by using water, ethanol and diethyl ether, and drying to obtain a finished product p-chlorophenylglycine; wherein the catalyst is trioctyl methyl ammonium chloride; wherein the molar ratio of the p-chlorobenzaldehyde to the trioctyl methyl ammonium chloride to the chloroform to the sodium hydroxide to the ammonium bicarbonate is 1.0 : (0.02-0.38) : (1.5-2.5) : (6.0-10.0) : (0.03-0.07). The synthesis process is simple, raw materials are easy to obtain,the reaction is milder, and toxicity and pollution of cyanide are avoided.

A water-cooling exhaust pipe for a natural gas engine not for a vehicle is used for a natural gas engine. A supercharger installation face is provided with an exhaust hole and water outlet holes. The exhaust hole communicates with a gas chamber in a water-cooling exhaust pipe, the gas chamber communicates with gas inlet holes of the water-cooling exhaust pipe, and the gas inlet holes communicate with an engine cylinder cover exhaust hole. The water outlet holes communicate with a water jacket in the water-cooling exhaust pipe, the water jacket communicates with a water inlet hole of the water-cooling exhaust pipe, and the water inlet hole communicates with an engine cylinder cover water outlet hole. According to the water-cooling exhaust pipe, by means of circular cooling of cooling water, the temperature of an exhaust manifold body can be reduced to 200 DEG C or lower from 650 DEG C, the temperature of the exhaust manifold body and the temperature and the pressure of exhausted waste gas are obviously reduced, and the service life of the engine is prolonged.

The invention discloses a full-rotational-flow supersonic separation device. The full-rotational-flow supersonic separation device comprises a shell and a central rotational flow component. The shellcomprises a direct-current flow stabilizing section, a Laval spray pipe reducing section, a Laval spray pipe expanding section and the like. The central rotational flow component comprises a front central rotational flow component and a rear central rotational flow component. The front central rotational flow component is positioned in the direct-current flow stabilizing section and the Laval spray pipe reducing section, and the rear central rotational flow component is positioned in the Laval spray pipe expanding section. When gas enters the direct-current flow stabilizing section and the Laval spray pipe reducing section, gas flow expands in a rotational flow state and reaches supersonic speed after reaching the Laval spray pipe expanding section, the temperature and the pressure are further reduced, the gas begins to condense, and the process of condensing during rotational flow can effectively reduce the influence of re-evaporation of liquid drops. Besides, the rotational flow component is also arranged in the Laval spray pipe expanding section, the rotational flow capacity of the rotational flow component is high and durable, and the separation effect and the separation efficiency of the device are guaranteed.

A self-adaptive regulation and control supercritical hydrothermal combustion type multi-element thermal fluid generation system comprises a reactor, a material pretreatment module, an oxidizing agent supply module, a cooling module, a temperature and pressure regulating module and the like, and the reactor, the material pretreatment module, the oxidizing agent supply module and the supercritical hydrothermal combustion reaction module are used for generating multi-element thermal fluid; the pressure and the temperature of the multi-element thermal fluid are adjusted through the temperature and pressure adjusting module, the wall face of the reactor is protected through the cooling module, the multi-element thermal fluid meeting the exploitation requirement is safely and stably produced, and a feasible scheme is provided for efficient exploitation of thickened oil.

The invention provides a catalyst composition, which comprises a VIII group metal compound catalyst shown as formula I and an auxiliary agent, wherein the auxiliary agent is sodium dodecyl benzene sulfonate. The catalyst system provided by the invention can realize effective hydrogenation of latex, can significantly reduce the use amount of the catalyst, improve the catalytic efficiency and reducethe industrial cost by adding a small amount of the auxiliary agent, has no participation of an organic solvent in the reaction process, and is beneficial to green chemical industry. The reaction rate of the reaction system is increased, the usage amount of the catalyst is low, the cost can be reduced, the reaction conditions are mild, the reaction efficiency is high, and rapid industrializationis facilitated.

The invention provides a catalyst composition, which comprises a VIII group metal compound catalyst represented by a formula I and an auxiliary agent, and the auxiliary agent is lauryl sodium sulfate.The catalyst system provided by the invention can realize effective hydrogenation of latex, the use amount of the catalyst is obviously reduced by adding a small amount of the auxiliary agent, the catalytic efficiency is improved, and the industrial cost is reduced. No organic solvent participates in the reaction process, and green chemical industry is facilitated. The reaction rate of the reaction system is increased, the usage amount of the catalyst is low, the cost can be reduced, the reaction conditions are mild, the reaction efficiency is high, and rapid industrialization is facilitated.

The invention relates to a catalyst for preparing alicyclic amine from aromatic amine as well as a preparation method and application of the catalyst. The catalyst comprises a carrier, and an active component and an auxiliary agent which are loaded on the carrier, wherein the active component is ruthenium, the auxiliary agent is an alkali metal modifier, and the carrier is aluminum oxide. According to the invention, the catalyst uses alumina as the catalyst carrier, ruthenium as the active component and the alkali metal modifier as the auxiliary agent, and the synergistic effect among alumina,ruthenium and the alkali metal modifier significantly improves the reaction activity of the catalyst; and when the catalyst is used for catalyzing aromatic amine to prepare alicyclic amine, catalyticreaction conditions are mild, and high temperature and high pressure are not needed, so the cost of the process of preparing alicyclic amine from aromatic amine is obviously reduced.

The invention discloses an extraction separation device used for catalytic cracking clarified oil and an extraction separation method thereof, and relates to the field of devices for pretreatment of catalytic cracking oil slurry. The technical purpose is to solve the technical problem that an existing supercritical fluid extraction device is high in extraction pressure and low in extraction rate in catalytic cracking oil slurry pretreatment. The device comprises a tank body, an ultrasonicator, an ultrasonic transducer, a pressure gauge, a temperature meter, a thermal insulation jacket, an agitator blade and a microwave generator, wherein the ultrasonicator is arranged at the outer side at the top end of the tank body, the ultrasonic transducer is arranged on the inner side of the top end of the tank body, the microwave generator is arranged on the side wall of the tank body, the bottom of the tank body is provided with a solvent inlet and an inlet of an object to be extracted, and the side wall at the upper portion of the tank body is provided with a mixture outlet. The method comprises the first step of conducting feeding, the second step of conducting mixed heating, and the third step of raising the pressure to conduct extraction. Under an ultrasound and microwave effect, the extraction separation device lowers the supercritical fluid extraction temperature and pressure, shortens the operation time, and improves the extraction efficiency. The extraction separation device is used in pretreatment of the catalytic cracking oil slurry.

The invention provides mass concrete and a preparation method thereof, and the mass concrete is characterized by comprising the following components in parts by weight: 170 KG/M < 3 > of water, 308 KG/m < 3 > of cement, 70 KG/M < 3 > of mineral powder, 56 KG/M < 3 > of fly ash, 10.3 KG/M < 3 > of an admixture, 694 KG/M < 3 > of sand and 1076 KG/M < 3 > of stone. The performance of the mass concrete produced according to the invention can meet the requirements of strength grade, impermeability, volume stability and the like, and the hydration temperature rise of a cementing material is also controlled, so that the purposes of reducing temperature and pressure and preventing temperature cracks are achieved.

The invention belongs to the technical field of coal chemical industry and relates to a coal gasification black water treatment system and a treatment process. The treatment comprises a deoxygenated water heater, a vortex separator, a hydraulic deoxygenated water pump, a hydraulic turbine pump, a separation tank, a normal-pressure gas cooler and a vacuum gas cooler, wherein the deoxygenated waterheater is connected with the vortex separator; the top end of the vortex separator is connected with the separation tank through the hydraulic turbine pump; and the bottom end of the vortex separatoris connected with the separation tank and the separator; heat and kinetic energy in the black water are recycled separately, the heat is recycled into a carbon washing tower, and the kinetic energy serves as a part of power source of the hydraulic deoxygenated water pump; the low-temperature black water with heat recovered is further separated after being subjected to coarse separation; and the separated saturated steam can be recycled as process gas. According to the invention, heat, kinetic energy and steam in the black water can be recycled, so that the cold consumption and kinetic consumption of the black water of the system can be reduced, the operation and maintenance workload is low, the process flow is short, the equipment is less, and the investment is small.

The invention relates to an optical glass element with a light absorption layer and a preparation method of the optical glass element, wherein the preparation method comprises the steps: pretreating optical glass to form a nano-scale or micron-scale gas diffusion channel on the surface of the optical glass; carrying out reduction treatment on the pretreated optical glass in a reducing atmosphere;and carrying out post-treatment on the optical glass subjected to reduction treatment to obtain the optical glass element with the light absorption layer. The optical glass element comprises an optical glass substrate and the light absorption layer, the light absorption layer is located on the periphery of the optical glass substrate, and the interface reflectivity between the light absorption layer and the optical glass substrate is smaller than 1%. The light absorption layer is a self-substrate light absorption layer, and the light absorption rate of the light absorption layer is greater than 99%. According to the preparation method, the problem that the light absorption layer is difficult to prepare in the optical glass with a compact structure is solved, and the problem that the lightabsorption layer falls off after being heated or subjected to external acting force does not exist.

A mechanism for gear transmission force transformation applied to internal combustion engines is composed of intermittent gears and is characterized in that the mechanism has a tooth profile modification function; damage collision, interference or tight occlusion does not take place during alternate meshing of the intermittent gears; two reverse torques of the driving intermittent gears could be transformed into a machine axis single-way torque; and fuel gas push force can be transformed into machine axis torsion and can be increased by about five multiples. The mechanism is applicable to piston-swing internal combustion engines and piston-rotary internal combustion engines.

The invention relates to the technical field of reducers, in particular to a reducer depressurization system which comprises an engine body, wherein a ventilation hood is arranged at the tail of the engine body; an antidust device is arranged on the ventilation hood; a dust cover, a signal converter, a fan base and a power supply port are arranged on top wall of inner side of the engine body; a temperature sensor is arranged in the dust cover and is fixed on top wall of inner side of the engine body through a fixing device; a bracket is connected onto the fan base through a bolt; one end of the bracket is fixed on the fan base; a rotary shaft is arranged at the other end of the bracket; fan blades are arranged on the rotary shaft; the temperature sensor, the signal converter, the rotary shaft and the power supply port are connected through internal lines; and the power supply port provides power supply. According to the reducer depressurization system, a reducer provided with the ventilation hood is designed, and the fan is additionally arranged, so that the purpose of rapidly reducing internal temperature and pressure in the reducer is realized, and the oil leakage phenomenon is reduced.

A pasteurization system is configured for incorporating a food treatment system which includes a mix hopper, a freezing cylinder, and a cooling condenser. The pasteurization system includes a pasteurizing pipeline and a cooling module. The pasteurizing pipeline includes a forwarding passage guiding a heat exchanging medium from the compressor to the mix hopper and the freezing cylinder, and a returning passage guiding the heat exchanging medium from the mix hopper and the freezing cylinder back to the compressor through the cooling condenser. The cooling module is operatively coupled at the returning passage for not only reducing the temperature and pressure of the heat exchanging medium at the returning passage but also releasing an excessive energy of the heat exchanging medium before returning back to the compressor.