32results about How to "Adjustable dwell time" patented technology

The invention relates to a process for calcining ammonium metavanadate for preparing powdered vanadium pentoxide. The process comprises the following steps of: (1) feeding ammonium metavanadate containing water of less than or equal to 1 percent by weight into an electric heating rotary furnace provided with an anti-agglomeration facility by using a feeder; (2) heating to rise the temperature to 510-560 DEG C, holding the temperature for 60-180 minutes, then cooling to 300-350 DEG C and discharging; (3) sending the material which has a temperature of 300-350 DEG C and is obtained in the step (2) into a cooling drum, and continuing to cool to 40-50 DEG C to obtain finished powder vanadium pentoxide; and (4) collecting a small quantity of vanadium pentoxide contained in tail gas of the rotary furnace by using a cyclone dust collector, carrying out primary water washing and secondary water washing on the tail gas to ensure that the ammonia content in the tail gas is reduced to reach an exhaust standard and then exhausting. The invention has the advantages of simple and reliable process, safe deamination, energy saving and environmental protection and is convenient to operate.

The invention discloses a double-helix pyrolysis reactor based on pyrolytic carbon internal circulation enhanced heat transfer, and belongs to the technical field of renewable energy utilization, wherein the double-helix pyrolysis reactor adopts a horizontal cylindrical outer helix drum as a main body, a pyrolysis gas outlet is formed in the upper end of the left part of the outer helix drum, a feeding hole is formed in the upper end of the right part of the outer helix drum, a pyrolytic carbon collecting box is arranged at the lower end of the right part of the outer helix drum, and an electric heating device is arranged on the outer side of the outer helix drum, and three support frames arranged at the lower part of the outer helix drum are used for supporting the outer helix drum; two coaxial rotating screw rods with opposite blade spiral directions, namely an outer screw rod and an inner screw rod, are arranged in the outer helix drum, a pyrolytic carbon exchange port is formed inthe left side of an inner helix drum, a carbon circulating port is formed in the lower end of the right side of the inner helix drum, and the pyrolytic carbon collecting box is arranged at the lower end of the right side of the outer helix drum; materials are conveyed through the spiral structure, the heat transfer performance of the device is improved, the biomass treatment capacity per unit volume is increased, and a solution is provided for the heat source problem of a movable pyrolysis device.

The invention discloses a waste tire cracking device and method based on combination of dividing wall heat exchange and microwave heating. The main body of the cracking device is a horizontal cylindrical shell (12); a spiral conveying device (3) is arranged on the left side of the shell; the right half section of the spiral conveying device is positioned in the shell; a feeding opening (2) is arranged in the upper part of the left side of the spiral conveying device; the spiral conveying device is driven by a first speed regulating motor (1.1); a pyrolytic carbon black collecting box (11) is arranged at the lower end of the right side of the shell, an electric heating device (6) is installed on the front section outside the shell, a microwave heating device (9) of a microwave heating section is installed on the rear section outside the shell, four supporting frames (4) are arranged on the lower portion of the shell to support the whole device, and spiral blades (13) are arranged in theshell and penetrate through the shell from left to right. The spiral structure is used for conveying materials, so that the material adaptability of the reactor is improved; and the waste tire particles are slightly carbonized in the continuous temperature rising process of front-section electric heating, so that the wave absorbing property of the waste tire particles is greatly improved.

The invention relates to full-boiling vibration propelled coal moisture control and grading integrated equipment, which comprises a primary air inlet section, a secondary air inlet section, and a vibration distribution plate, wherein the primary air inlet section is positioned below the vibration distribution plate, and a sedimentation separation area is positioned in an area above the vibration distribution plate; the vibration distribution plate has an obliquely arranged fluidized bed structure; the top airflow outlet of a grader is connected with a fine particle separation device; the outlet of the fine particle separation device is connected with the inlet of a fine particle recycling device; the upper part of the fine particle recycling device is communicated with a smoke exhaust fanthrough a connecting pipeline; and the smoke exhaust fan is connected with a chimney. Coke oven flue gas is taken as a heat medium; and according to a characteristic that raw material coal has high heat and mass transfer efficiency in a full-boiling fluidized state and low heat and mass transfer efficiency in a fixed bed and half-boiling fluidized state, a coal material can be subjected to moisture control uniformly and efficiently, and can be efficiently graded.

The invention discloses fluidized bed drying equipment. The equipment integrally designs a material drying system, a separation system and a collection system based on the fluidizing drying technologyand the centrifugal principle, and materials have the advantages that heating is uniform, the time in a drying roller can be adjusted, the drying speed is high, products obtained after material drying are separated thoroughly, multiple dried articles can be collected at the same time, and the automation degree is high. A box body is composed of an inner heat conduction layer, a middle heating layer and an outer heat preservation layer, the heat energy utilization rate is high, a temperature controller and a timer are arranged, and therefore automatic control is achieved; temperature distribution in a fluidized bed is uniform, and the heat transfer effect is good; and the temperature and the air speed can be automatically controlled at the same time, the phenomenon of non-uniform partial heating of the materials is avoided, and the fluidized bed drying equipment is especially suitable for drying thermosensitive materials. The reliability of a screw feeding mechanism is high; a dust removal device can reduce the amount of dust in waste gas and is beneficial to environment protection; and the equipment structure is simple, and the fluidized bed drying equipment is suitable for beingused and popularized in drying and separating of crop and chemical products.

The invention belongs to the technical field of chemistry industry, and relates to a device used for removing organic impurities in by-product sodium chloride in chlorine chemical process. The devicecomprises a high temperature oxidation reactor, a dissolving kettle A, a dissolving kettle B, a liquid phase deep oxidation tower, a liquid solid filter, a solid slag tank, and a fine filter which areconnected successively. In application process, firstly, the multilayer fluidized bed type high temperature oxidation reactor is adopted for high temperature oxidation of most organic impurities in by-product sodium chloride, then in the liquid phase deep oxidation tower, residual trace amount organic impurities are subjected to deep oxidation, and a nanofiltration membrane separator is adopted to remove high molecular organic matter impurities further, so that requirements of ionic membrane caustic soda industrial devices on organic impurities in sodium chloride are satisfied. The device islarge in operation flexibility, and high in organic impurity processing efficiency.

The invention provides a multi-cell A<2>O system of sludge anoxic and strengthened fermentation hydrolysis. The system comprises a sludge anoxic cell, a strengthened fermentation hydrolysis cell, an anoxic cell, an aerobic cell and a secondary sedimentation tank, wherein a water inlet pipe is connected with the sludge anoxic cell; the aerobic cell is connected with the anoxic cell through an internal reflux pipeline; and 2 or 3 strengthened fermentation hydrolysis cells, 2 or 3 anoxic cells and 2-4 aerobic cells are provided. By adopting the system provided by the invention, the sludge of the sludge anoxic cell is denitrified through endogenous respiration, and the internal carbon source in sludge is fully used so that more carbon sources are applied to a nitrogen and phosphorus removal biological reaction of the mainstream AAO technology; the nitrate content of the sludge anoxic cell can be reduced to 0, the redox potential in the strengthened fermentation hydrolysis cell is very low, and the effect of anaerobic phosphorus release is improved; and meanwhile, hydrolysis fermentation is performed through a high-concentration sludge layer in the strengthened fermentation hydrolysis cell, macromolecular or refractory organic substances in the inflow water are converted into low-molecular-weight fatty acid, and a high-quality carbon source is provided for the anaerobic phosphorus release and anoxic denitrification reactions.

The invention relates to a full-boiling vibration propelled coal humidifying and grading process. In the process, flue gas of a coke oven is taken as a heat source, a coal humidifying and grading machine is taken as coal fluidizing and humidifying equipment, and integration of coal humidifying and coal grading is realized according to principle of a vibrated fluidized bed under the action of secondary air, wherein the coal humidifying and grading machine comprises a primary air inlet section, a secondary air inlet section and a vibration distribution plate; the primary air inlet section is arranged at the lower part of the vibration distribution plate, and region at the upper part of the vibration distribution plate is a deposition separation region; and the vibration distribution plate is a vibrated fluidized bed structure which is arranged in an inclined manner, the secondary air inlet section is arranged at the upper part of the vibration distribution plate, and an airflow outlet is arranged at the top part of a grading machine. In the process, waste flue gas of the coke oven is taken as a heat medium, and the characteristics that raw material coal has high heat and mass transfer efficiency under the condition of a full-boiling fluidized bed and has low heat and mass transfer efficiency under the condition of a fixed bed and a semi-boiling fluidized bed are utilized, thus uniform and high-efficiency humidifying of coal can be realized and high-efficiency grading of the coal can also be realized.

The invention relates to device (1) for applying a liquid or pasty medium (2) to a moving fibrous web (3), in particular a paper, bank note paper, cardboard, or packaging paper web, on both sides, comprising a first application roller (5.1) and a second application roller (5.2), which extend at least over the width of the moving fibrous web (3) and which form a roller gap (N) having a roller inlet area (6), through which roller gap the moving fibrous web (3) can be fed, and comprising a feed device (7) for feeding the liquid or pasty medium (2) into the roller inlet area (6) of the two application rollers (5.1, 5.2), wherein during the operation of the device (1), a liquid sump (8) is formed in the roller inlet area (6) of the two application rollers (5.1, 5.2), through which liquid sump the moving fibrous web runs, and by means of which feed device the level (9) of the liquid sump (8); can be adjusted. The device (1) according to the invention is characterized in that at least one immersion bath device (10) that also accommodates the liquid or pasty medium (2) is arranged upstream from the liquid sump (8) and the roller gap (N) as viewed in the web movement direction (L) of the moving fibrous web (3).

The invention discloses a three-dimensional dynamic column plate which comprises a column plate and a three-dimensional dynamic mass transfer unit mounted on the column plate, wherein each three-dimensional dynamic mass transfer unit comprises a fixed end plate, a movable end plate, an injection plate and a separation plate; the bottom of the fixed end plate is mounted on the column plate, an injection channel is defined by the edge of the fixed end plate, the edge of the movable end plate, the side edge of the injection plate and the upper end of the separation plate, the injection plate is arranged on the side edge of the fixed end plate, and a movable groove is formed in the fixed end plate; a fixed part matched with the movable groove is formed at the lower part of the movable end plate and is used for moving up and down in the movable groove, the top of the movable end plate is connected with the separation plate, a gap is reserved between the separation plate and the upper part of the injection plate, and a lower gap is reserved between the lower part of the injection plate and the column plate. Compared with a traditional column plate, the operation flexibility of the column plate is improved to 30-200%; wherein the movable end plate moves up and down relative to the fixed end plate, so that the distance between the separation plate and the spraying plate is adjusted, the gas-liquid separation effect is improved, and the suitable operation range is wider.

The invention provides a crystal form transformation energy-saving device, which comprises a main box body, a blanking pipe, a pressure equalizing pipe, a return pipe and a wind distribution mechanism. The crystal form transformation energy-saving device has the effects of simple structure and convenient making, is convenient to control an appropriate retention time of materials in the main box body, ensures the completion of material crystal form transformation, and enables the product to reach the quality requirements of high-quality metallurgical grade alumina. The invention also provides an alumina roasting system, which includes a main roasting furnace, a cyclone separation device and the crystal form transformation energy-saving device. Through combination of the crystal form transformation energy-saving device and an existing alumina roasting system, the alumina roasting system provided by the invention has the characteristics of lowering the temperature of the main roasting furnace, reducing the unit consumption of fuels or increasing the productivity of the roasting furnace, reducing the initial nitrogen oxide concentration of the roasting furnace and the like, and throughthe design of a secondary air supply apparatus, the initial nitrogen oxide emission of the roasting furnace is greatly reduced. The invention also discloses a production method of alumina, the methodhas the advantages of simplified technological process, high efficiency, energy saving and emission reduction, and is easy for industrial production.

The utility model relates to a low-temperature roasting furnace for producing amorphous aluminum oxide from crystalline aluminum chloride. The low-temperature roasting furnace comprises a hot-blast stove (1), an air chamber (2), an air distribution plate (3), a hearth reaction area (4), a hearth flaring section (5), a cyclone separator (6), a cooling air port (7), a feed port (8), a hearth discharge port (9) and a cyclone separator blanking leg (10). According to the invention, the temperature of the hearth reaction area is controlled at the low-temperature decomposition temperature point of the crystalline aluminum chloride, and the crystalline aluminum chloride can have enough residence time in the hearth reaction area, so that the crystalline aluminum chloride can be converted into amorphous aluminum oxide to the greatest extent.

A device for continuously separating hexachloroethane in tetrachloroethylene solid waste. The device comprises a base, a speed regulating motor, a driving motor and a strip groove; the outer side wallof the strip groove is covered with a heating jacket, and the opening of the strip groove is sealed by a sealing cover body; a speed regulating shaft is rotatably disposed in the strip groove; a first spiral blade extending along the axial direction is arranged on the speed regulating shaft, and the first spiral blade is in clearance fit with the groove wall of the strip groove; a feeding vertical pipe is fixed at one end of the sealing cover body, and a tapered feeding hopper is connected to the upper end opening of the feeding vertical pipe; a driving shaft is rotatably arranged in the feeding vertical pipe; the driving shaft is provided with a second spiral blade extending along the axial direction; the second spiral blade is in clearance fit with the inner wall of the feeding verticalpipe; the other end of the sealing cover body is provided with an exhaust port for connecting with a material steam trap; the bottom of the strip groove is provided with a discharge pipe; and the discharge pipe is located below the other end of the first spiral blade.