24 results about "Fluidized bed" patented technology

A one-step process for preparing both cyanuramide and the ammonium hydrogen carbonate/sodium carbonate and ammonium chloride features that the synthetic amonia is directly delivered to the cyanuramide preparing step, where it is preheated to 350-400 deg.C and used as gas carrier of fluidized bed, and the gas from liquid urea washing tower is divdied into two channels, one returning back to crystallizer and used as cold gas and another being directly used to prepare ammonium hydrogen carbonate/sodium carbonate and ammonium chloiride. Its advantages are low cost and high catalytic efficiency.

The invention discloses a continuous preparation technology of high-purity low-viscosity dimethicone. The continuous preparation technology comprises the following steps that 1, a mixture of methylcyclosiloxane and an end-capping reagent is orderly subjected to liquid nitrogen freezing dehydration and deep dehydration until the water content of the mixture is less than 300ppb; 2, the treated mixture is subjected to adsorption filtration, nanofiltration membrane filtration and pre-heating, then is fed into a fluidized bed with a catalyst and undergoes a catalytic reaction; and 3, reaction products are subjected to adsorption filtration, nanofiltration membrane filtration and a low-boiling-point substance removal process so that a low-boiling-point substance is removed and the high-purity low-viscosity dimethicone is obtained. The high-purity low-viscosity dimethicone obtained by the continuous preparation technology has the advantages of low ion content, low hydroxyl content and low solid content. The continuous preparation technology has a raw material utilization rate of 100%, realizes zero discharge, is an environmentally friendly green technology and is suitable for low-viscosity dimethicone production.

The invention relates to a system for urban sludge flue gas drying middle-temperature pyrolysis carboization. The system comprises a hot air device and a feed storage metering device, a low-temperature flue gas drying device, a bag-type dust remover, a middle-temperature pyrolysis carboization device, a flue gas waste heat recovery device and a tail gas purification and deodorization device which are connected in sequence, and the hot air device supplies hot air to the low-temperature flue gas drying device and the middle-temperature pyrolysis carboization device. According to the system for urban sludge flue gas drying middle-temperature pyrolysis carboization, by means of optimal combination of the system and energy gradient utilization, the energy consumption of the system is reduced, and the thermal efficiency is effectively improved; by means of middle-temperature pyrolysis, the problem that coking and blocking are caused by local overheating of the sludge is solved, and the reliability of the system is improved. The system adopts a low-temperature flue gas drying technology and serves as front section sludge drying core equipment, the atomizing drying efficiency is high, and the time is short; a principle of combining the drying section with a spouted bed and a fluidized bed can effectively control the particle size of dried discharging materials to be 2-4 mm, and the subsequent carbonization efficiency is effectively improved.

The electronic element and device powder covering machine based on one heating mechanism with wind direction and wind speed control includes one frame, one fluidized bed, one heating mechanism and one powder soaking mechanism. The heating mechanism includes one heating furnace, one heat flow homogenizing mechanism on the heating furnace, and one heating and insulating box. The heating furnace is provided with heating elements and a hot blast circulating passage; the heating and insulating box includes a wind hood, a centrifugal fan, an inner container and a casing. The present invention is used to heat electronic element and device with hot blast in the temperature uniformity within 1 deg.c.

A liquid feed material such as a heavy hydrocarbon feed in liquid form is contacted with a fluidized bed of heated solid particles which have a bulk horizontal velocity which is generally perpendicular to the flow of a fluidizing medium. The liquid feed material reacts on the solid particles to produce a vapor phase product, which vapor phase product is collected in a vapor collection apparatus.

The invention relates to a venlafaxine hydrochloride sustained-release capsule and a preparation method thereof, wherein the sustained-release capsule is composed of a sustained-release pillet and a capsule shell; the substrate of the sustained-release pillet is an inert pillet core; and a fluidized bed respectively comprises a medicine layer, an isolation layer and a sustained-release layer. Compared with the traditional rolling extrusion method, the preparation method disclosed by the invention is simple; and simultaneously, because of optimal selection of a coating layer, long-term release of medicines can be realized.

The invention discloses a powdery active coke fluidized bed desulfurization, ammonia injection and denitration combined system and method. The method includes the steps: 1) enabling dedusted flue gasto flow into a fluidized bed desulfurization tower and contact with sulfur-containing active coke and catalyzed powdery active coke, and removing sulfur dioxide in the flue gas by adsorption; 2) enabling the desulfurized flue gas after gas-solid separation to enter a fluidized bed denitration tower, adding ammonia and the powdery active coke, enabling powdery active coke to catalyze the ammonia toreduce nitric oxide in the flue gas into nitrogen, and removing the nitric oxide; (3) separating the flue gas after denitration by the aid of a second gas-solid separator and a bag-type dust collector, conveying the separated flue gas into a chimney, recycling the sulfur-containing coke separated by a first gas-solid separator into the fluidized bed desulfurization tower to be circularly used, and recycling circulating coke separated by a second gas-solid separator into the fluidized bed desulfurization tower to be circularly used, and adding the catalyzed powdery active coke separated by thebag-type dust collector into the fluidized bed desulfurization tower to perform desulfurization.

The invention relates to the technical field of environmental protection, specifically to a special preparation device for a boiler flue gas desulfurization tower repairing agent. The special preparation device for the boiler flue gas desulfurization tower repairing agent is characterized by comprising a closed type circulation low-oxygen boiler tail gas mixing tower system, an A component preparation system, a B component preparation system, a double spiral agitator and a supporting frame assembly. The closed type circulation low-oxygen boiler tail gas mixing tower system comprises a closed type circulation low-oxygen boiler tail gas mixing tower, a multicyclone, a Roots blower assembly, a circulating fluidized bed boiler fly ash spiral conveyor, a connecting air pipe assembly and a circulation low-oxygen boiler tail gas supplement port. The closed type circulation low-oxygen boiler tail gas mixing tower system adopts tail gas from a boiler flue gas dust remover as a medium for conveying circulating fluidized bed boiler fly ash, and has the characteristics of low oxygen, dryness and cleanness, the activity of SiO2 particles of the circulating fluidized bed boiler fly ash can be maintained, and the boiler tail gas is used as the gas medium to complete the technological processes of conveying, mixing and separating, so that waste is turned into wealth substantially, and high-value utilization of the boiler tail gas is realized.

The invention relates to a method for treating an organic waste gas by using a plasma fluidized bed. The method comprises the following steps: introducing the organic waste gas to be treated into a plasma device comprising the plasma fluidized bed and a high-voltage power supply; starting the high-voltage power supply; forming an athermal arc plasma from a cutter-shaped stainless steel electrode under the action of high voltage so as to convert air in the organic waste gas into an active gas with a great amount of active substances; degrading and mineralizing toxic substances in the organic waste gas; driving granular activated carbon inside a stainless steel net through undegraded toxic substances and degradation products to fluidize so as to form the plasma fluidized bed; enabling the granular activated carbon to adsorb toxic substances which are not degraded by the plasma, and degradation products so as to form a toxic substance accumulation area; on the other hand, enabling the active gases to activate the surface of the granular activated carbon and at the same time degrade and mineralize the toxic substances accumulated on the surface of the activated carbon, thereby completing modification and regeneration of the activated carbon. Due to double actions of plasma and the activated carbon, the purpose of purifying organic gases is achieved.

A method for processing fluidized-bed withered tea leaves comprises the following steps of (1) feeding picked fresh leaves into a fluidized bed and turning and blowing the leaves for 4-6 hours with hot air with the temperature of 30 DEG C; (2) performing enzyme deactivation and aroma fixation, namely directly feeding the leaves into an oven with the temperature of 230-250 DEG C, blowing the hot air for turning the leaves for 4-10 minutes, and discharging the leaves. According to the method, the processed tea leaves are wiry in shape, high in amount of tea leaf hairs, yellow and green in color and luster, apricot yellow and bright in soup color, fresh and mellow in taste and lasting and high in aroma, have unique color, aroma, taste and shape, and are improved in added value.

The invention discloses a measuring method of a mobile multi-point measuring device for multiphase flow parameters of a gas-solid fluidized bed. The measuring method comprises the following steps: determining the measuring range of a probe in horizontal and vertical directions and moving distance during probe measurement; turning a vertical operating panel, so as to shift a probe hole to a lowest position within the measuring range, turning a horizontal operating panel, so as to shift the probe hole to a position on the axis of the fluidized bed, recording displacement reading value, corresponding to the position, on a measuring device, and taking the point as an initial datum point for probe measurement; then, loosening left and right clamping pieces, turning the vertical operating panel, lifting the probe by delta y mm, and turning the horizontal operating panel leftward or rightward by delta x mm, so as to ensure that the coordinate of the probe is (x0+delta x, y0+delta y) and is positioned at a second measuring point; repeating the steps, so as to accomplish the measurement of target parameters of all measuring points within the measuring range. The method has the advantages that the measurement cost is low, the method is accurate in measurement, and a single probe is adopted to perform multi-point measuring of multiphase flow parameters in the gas-solid fluidized bed.

The invention relates to a method for arranging a circulating pump in a fluidized bed hydrogenation device and belongs to the technical field of petrochemical engineering and coal chemical industry. The method for arranging the circulating pump in the fluidized bed hydrogenation device disclosed by the invention comprises the following steps: (1) removing solid residues from inferior heavy oil and dehydrating; (2) mixing the inferior heavy oil treated in the step (1) with hydrogen, and feeding the mixed gas into a fluidized bed hydrogenation reactor; (3) feeding the reaction product obtained in the step (2) into a high-pressure hot separator for flashing so as to obtain high fraction hot gas and high fraction hot oil; and (4) delivering the high fraction hot gas and one part of the high fraction hot oil obtained in the step (3) to a downstream treatment facility, pressurizing the other part of the high fraction hot oil by a circulating pump, and feeding to the bottom of the first fluidized bed reactor. According to the method disclosed by the invention, the investment of the device is reduced, the interior part design of the reactor is simplified, the mounting height of the reactor is reduced, and the engineering problem that gas etching of the circulating pump is easily caused is solved.

A process to react an oxygen containing regenerated catalyst stream prior to use in a fluidized bed reactor comprising providing a regenerated catalyst stream which comprises at least 0.001 wt % oxygen; reacting the regenerated catalyst stream with a fuel source thereby forming oxides and reducing the amount of oxygen in the regenerated catalyst stream to produce a usable regenerated catalyst stream; and injecting the usable regenerated catalyst stream into a hydrocarbon fluidized bed reactor is provided.

The invention discloses a finned tube fluidized bed heater. The finned tube fluidized bed heater comprises a shell, a vertical tube bundle and a gas distributor. The vertical tube bundle is composed of a plurality of finned tubes. Each finned tube comprises a light tube and fins, wherein the fins are longitudinally welded to the surface of the light tube. The fins include different structures, andspecifically, a fin bending structure, a fin trepanning structure, a fin notching structure and a fin structure in the combined form of the three kinds of fins are included. According to the finned tube fluidized bed heater, heat transfer is enhanced, and the heat transfer efficiency is improved.

The invention provides integrated backflow-free A2O equipment based on a fluidized bed. The equipment comprises an anaerobic zone, an anoxic zone, aerobic zones and a sedimentation tank, and is characterized in that the anaerobic zone, the anoxic zone and the sedimentation tank are sequentially arranged and communicated through an overflow port, the aerobic zones are arranged on the two sides of the anoxic zone and communicated with the anoxic zone and the sedimentation tank, the anoxic zone and the aerobic zones are separated through flow guide plates, the flow guide plate is provided with at least two circulation ports from top to bottom, an aeration disc is arranged at the bottom of the aerobic zone, stirring devices are arranged in the anaerobic zone and the anoxic zone, the bottom of the sedimentation tank is provided with a sludge reflux inlet and a sludge discharge port, the sludge reflux inlet is communicated with the anaerobic zone, and the top end of the side wall of one side, far away from the anoxic zone, of the sedimentation tank is provided with a water outlet. According to the invention, efficient and low-energy-consumption wastewater treatment is realized.

The invention relates to a steam explosion method for improving the tobacco stalk quality by using carbon dioxide as an exogenous gas, belonging to the field of steam explosion tobacco processing. The method comprises the following steps of: moistening the tobacco stalks and controlling the water content within 30 to 40%; loading the moistened and softened tobacco stalks into an explosion chamber, sealing an upper cover and introducing CO2 exogenous gas for 20 seconds at the introduction pressure of 0.4 to 0.6 MPa; introducing saturated steam for 60 seconds and closing a steam valve at pressure of 0.6 to 1.0 MPa, so as to explode the tobacco stalks; placing the exploded product into a fluidized bed for dehydrogenation and drying until the water content is within 30 to 40%; and shredding and dilating the dehydrogenated and dried tobacco stalks for cigarette formulation. The processed sample has good aroma delivery performance, remarkably reduces the pungency and the strength, good flammability and entirely enhanced sensorial quality; in addition, compared with the original basis, the formulation stalk shred ratio is improved by 2 to 3%.

Apparatus for separating solids from flue gas in a circulating fluidized bed (CFB) boiler comprises plural vertical, impact type particle separators made of a plurality of hung elements which are supported from at least one cooled support tube. The plurality of hung elements cooperate with one another at adjacent ends thereof to form a collecting channel which opens toward a flow of flue gas along the length of the support tube. Each hung element includes two mutually inverted U-shaped parts; the first U-shaped part opens towards the oncoming flow of flue gas, the second U-shaped part embraces the support tube, and the first U-shaped part is shifted relative to the second U-shaped part by some fraction of a height of the hung element. The hung elements may be made of metal or ceramic.

The invention discloses a method and a device for producing granular polysilicon by utilizing the fluidized-bed process. Hydrogen chloride is fed into a fluidized-bed reactor from an expanding section of the top of a fluidized bed and is reacted with fine silicon powder generated in the process of producing granular silicon to generate chloro-silicane gas so that risks of harm to a system due to the fact that the fine silicon powder enters a pipeline at the rear end of the fluidized bed are eliminated, fine silicon powder entrainment is eliminated simultaneously, gas inlet flow of the fluidized bed is improved so as to improve unit capacity of the rector, and production cost is lowered. Besides, the hydrogen chloride fed into the fluidized-bed reactor from the top is reacted with the fine silicon powder to generate chloro-silicane so that circulation of a certain amount of chloride in the reactor is achieved.