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2546 results about "Screw conveyor" patented technology

A screw conveyor or auger conveyor is a mechanism that uses a rotating helical screw blade, called a "flighting", usually within a tube, to move liquid or granular materials. They are used in many bulk handling industries. Screw conveyors in modern industry are often used horizontally or at a slight incline as an efficient way to move semi-solid materials, including food waste, wood chips, aggregates, cereal grains, animal feed, boiler ash, meat and bone meal, municipal solid waste, and many others. The first type of screw conveyor was the Archimedes' screw, used since ancient times to pump irrigation water.

Food product surface sterilization apparatus and method

InactiveUS20040052702A1Increase temperatureReduce food product temperature changeFood preservationIndirect heat exchangersUnsafe conditionUltraviolet
An apparatus is disclosed for the micro-organism surface sterilization of foods using, a "germicidal" such as light waves (e.g., ultraviolet), and in some cases in combination with (or replaced by) one or more of sound waves and ozone. The surface sterilizer apparatus may include a plurality of germicidal (e.g., ultraviolet) emitters for surface sterilization of foods that are, e.g., rotated in a drum or rotated via a screw auger. Assemblies of emitters for the germicidal may be constructed to be watertight (i.e., withstand a high pressure, heated water spray), and movable relative to the drum or screw conveyor for easy cleaning and maintenance. The apparatus may also include a controller (e.g., programmable logic controller) for controlling the sterilization process so that the apparatus does not endanger personnel nearby, and so that the food is properly sterilized. The controller may vary the amount of germicidal used, the rate that food traverses the apparatus, the inclination of the apparatus, and terminate sterilization processing when an unsafe condition is detected. The apparatus may be used in-line with other food processing equipment for the real-time sterilization of food. The controller may also communicate with food processing components upstream of the apparatus for controlling the flow of food to the surface sterilizer

Process and system for continuously extracting oil from solid or liquid oil bearing material

A process for continuously extracting oil from a solid or liquid oil-bearing material comprises (a) removing air from the extraction system, (b) introducing an inert gas into the extraction system at a pressure sufficient to maintain a normally gaseous solvent in liquid state, (c) introducing an oil-bearing material into a silo, (d) passing the oil-bearing material from the to a jet pump mixing device, (e) introducing a liquified normally gaseous solvent into the jet pump mixing device, (f) mixing the oil-bearing material and the solvent in the jet pump mixing device for a time sufficient to permit complete wetting of oil-bearing material by the solvent to form a mixture, (g) heating the mixture to near supercritical conditions; (h) passing the mixture through an extractor having a screw conveyor adapted to rotate at a first rpm range and a centrifugal drum adapted to rotate at a second rpm range, (i) treating the mixture within the extractor in such a manner that supercritical temperature and pressure are attained, wherein treating the mixture includes a combination of increasing the rpms of the centrifugal drum, increasing the temperature inside the extractor and increasing the inert gas pressure inside the extractor, (j) extracting oil from the mixture by pressure diffusion provided by the combination of increased rpms, increased temperatures and increased inert gas pressures at supercritical conditions, (j) removing liquids extracted from the mixture through a liquids exit port, and (k) removing solids extracted from the mixture through a solids exit port.

Novel process for comprehensively treating oily sludge of oil field

The invention provides a novel process for comprehensively treating oily sludge of an oil field, which comprises processes for separating oil, water and sludge from the oily sludge. The process is characterized in that the processes for separating oil, water and sludge comprise a first process of fluidizing and pre-treating sludge, a second process of hardening and tempering the sludge, and a third process of mechanically separating the oily sludge; water separated through the processes can be used as process water to a circulating water recycling process; the separated cleaned oil enters an oil chamber of an oil-water separation device; and solid particles, namely the centrifuged sludge, are discharged through a screw conveyer. The process has the recovery ratio reaching 95 percent for recovering effluent oil to the utmost extent; and the treated sludge has water content less than 60 percent and oil content less than 2 percent, and can be used for underlaying a road of a well site or carrying out subsequent depth treatment. The process cyclically utilizes wastewater, prevents secondary pollution of sewage and slurry, and has large treatment capacity, wide treatment range, advanced technical proposal, high automatic degree, low operation cost, simple operation and clean production.

Color drought-resistance water-retention sustained-release compound fertilizer and method for producing same

The invention discloses a color drought-resistance water-retention sustained-release compound fertilizer and a method for producing the same, wherein the method comprises the followings steps of: measuring, crushing and uniformly mixing fertilizer raw materials, granulating by adopting an ammonia-acid method rotary drum granulating process, performing one-stage drying, semi-cooling and screening of grains, and sending the mixture to a coating machine; adopting a continuous melting rotary drum film-coating method coating process to perform compressed air atomization and uniform coating of color coating oil sprayed by a special nozzle; and adding a water-retaining agent and an anti-adhesive agent by a screw conveyor, and performing full stirring, cooling and packaging to obtain the finishedproducts. The color drought-resistance water-retention sustained-release compound fertilizer has the effects of drought resistance, water retention, nutrient preservation, soil condition improvement and environmental protection, and the appearance of the fertilizer has color marks; and when the fertilizer is applied to crops, the fertilizer has the advantages of increasing yield and incoming, along with simple production method, convenient operation, low cost and high benefits.

Drying-free dry-mixed mortar complete equipment

The invention relates to drying-free dry-mixed mortar complete equipment, comprising a charging belt conveyor (1), a crusher sand making machine (2), a discharging bucket elevator (3), a circulating vibration screen (4), a screening bucket elevator (9), a vibrating screen classifier (11), a classified sand warehouse (12), a return bucket elevator (5), a stone powder dust collector (6), a stone powder temporary storage bin (12), a stone powder delivery tank (8), a stone powder additive bin (14), a cement bin (15), a sand dispensing and metering device (16), an additive dispensing and metering device (17), a cement dispensing and metering device (18), a metering material spiral conveyer (19), a metering material bucket elevator (20), a metering material intermediate transition bin (21), an additive storage silo (22), an accurate dispensing and metering device (23), a mixer (24), a finished product material transition bin (25), a bulk head (27), a wrapping finished product bin (28), a sack filler (29), a package belt conveyer (30), a finished product material storage spiral conveyer (31), a finished product material storage bucket elevator (32), a dissociation-proof transport unloading device (33) and a finished product material bulk storage silo (34). The invention can omit drying and realizes drying-free effect.

Resource utilization method of sludge based on thermal hydrolysis-pyrolysis carbonization

The invention discloses a resource utilization method of sludge based on thermal hydrolysis-pyrolysis carbonization. The method includes the steps of: (1) transporting dehydrated sludge to a sludge preheater; (2) sending the preheated sludge into a sludge thermal hydrolysis reaction kettle; (3) subjecting the thermal hydrolysis product to solid-liquid separation to obtain thermal hydrolysis filtrate and a solid product; (4) carrying out natural heap drying, crushing, activation and granulation on the solid product successively, then conveying the product to a rotary controllable pyrolysis carbonization furnace by a spiral conveyer, and conducting high-temperature rapid pyrolysis to obtain biochar, tar and high-temperature waste gas, introducing the high-temperature waste gas into the sludge preheater, and subjecting the biochar to resource comprehensive utilization; and (5) subjecting the thermal hydrolysis filtrate to anaerobic fermentation, and using the generated biogas as the fuelof the pyrolysis carbonization furnace. The method provided by the invention overcomes the problems of high energy consumption of the sludge carbonization process and nonstandard resource utilizationmethod of sludge biochar in sewage treatment plants at present, and realizes reduction, stabilization, harmless and resource comprehensive utilization of sludge in sewage treatment plants.

Sludge drying and incinerating system on basis of incineration of waste grate furnace and treatment method thereof

The invention relates to a sludge drying and incinerating system on the basis of incineration of a waste grate furnace and a treatment method thereof. In the system, after entering a factory, sludge with the moisture content of 80 percent is unloaded into a front material storage bin; the sludge is quantitatively fed into a conditioning tank by a sludge screw conveyer at the bottom of the front material storage bin under a uniform speed; when the sludge enters the conditioning tank, dilution water and the sludge are added into the conditioning tank according to a weight ratio of the dilution water to the sludge of 1:1; when the sludge reaches a high limit liquid level, the sludge is stopped being added; the mixture is stirred uniformly to complete conditioning the sludge; the conditioned sludge with the moisture content of 90 percent is fed into a two-diaphragm vacuum air compressor through a sludge screw pump to be subjected to pressure filtration dehydration and steam heating drying, wherein a dehydrated and dried sludge cake has the moisture content of below 30 percent; after waste heat gas generated in the drying process of the sludge is vacuumized and condensed, wastewater is generated, enters a sewage treatment system to be treated and is discharged after reaching the standard; the waste gas is collected and enters a waste pond of a waste grate furnace incineration system; after the dried sludge is crushed by a crusher, the dried sludge and municipal domestic waste are fed into the grate incineration furnace to be incinerated according to a certain ratio; and the waste gas, fly ash, slags and the like which are generated in the incinerating process can be treated by the existing treatment system of a waste incineration power plant.

Environmentally-friendly paper making and pulping technique and system with high yield

The application of the invention provides an environmentally-friendly paper making and pulping technique with high yield, which comprises a raw material preprocessing stage, a physical fibrillation impregnating processing stage, an impregnating, steaming and bleaching three-section integrated pulping stage and a thickening and dewatering processing stage. An environmentally-friendly paper making and pulping system with high yield realizing the pulping technique comprises a stock cutter, a hammering and fibrillation screening dust remover, a washing dust remover, dewatering conveying equipment, a spiral steaming conveyor, a crashing, extruding and impregnating machine, a stirring and impregnating cabin, a pump pipe and a discharge pipe of a high-enriched steaming, bleaching and pulping all-in-one machine, wherein the pump pipe is connected to the high-enriched steaming bleaching pulping all-in-one machine; the discharge pipe of the high-enriched steaming, bleaching and pulping all-in-one machine is connected to a pulp cabin; the pump pipe of the pulp cabin is connected with a thickening and dewatering machine; the thickening and dewatering machine is output to the high-enriched pulping machine; the output of the high-enriched pulping machine is connected with a screening purifier and a thickening and squeezing machine in sequence. In the invention, the problems of high pollution, high energy consumption, serious shortage of paper making raw material and the like in present pulping and paper making industry can be solved fundamentally; rich plant fiber in the nature can be used, and the technical purposes of efficient bleaching, high yield, no black liquor and low energy consumption can be realized.
Owner:李刚荣 +1

High-precision powder quantitative feeding machine

The invention discloses a high-precision powder quantitative feeding machine, in order to solve the problems of instability in weighing and poor metering precision caused by a larger error of a metering screw because powder materials usually run through a feeding screw due to overlarge bin pressure when a double-screw meter is adopted to weigh in the prior art. The high-precision powder quantitative feeding machine disclosed by the invention comprises a feeding pipe, a feeding mechanism, a weighing mechanism and a discharging mechanism, wherein the feeding pipe, the feeding mechanism, the weighing mechanism and the discharging mechanism are connected in sequence; a feeding valve used for controlling the feeding speed is arranged on the feeding pipe; the feeding mechanism is a rotary disc feeding machine and is used for further relieving pressure, so as to be convenient for materials to stably flow into; a scraping device is arranged in the weighing mechanism to prevent the materials from remaining on the inner wall of a weighing bin; the discharging mechanism is a double-screw conveyer which is arranged in the weighing bin, the materials are output by the double-screw conveyer, so as to realize thick and thin flow control; in addition, a gate valve is arranged in an output port of the double-screw conveyer. The high-precision powder quantitative feeding machine disclosed by the invention has the advantages of simple structure and high precision, and the thick and thin flow control can be realized.

Deep recycling process and system for oily sludge

The invention discloses a deep recycling process for oily sludge. The process comprises the following steps: feeding oily sludge and a tempering agent into a tempering tank and uniformly stirring by using a heating device arranged in the tempering tank to realize oil-water-sludge three phase separation; separating an oil-water mixed solution into oil contents and water contents; feeding oily sludge into a vacuum dehydration machine; feeding the dehydrated oil sludge into a dry distillation furnace and performing dried distillation; purifying the dry distilled gas and feeding the purified dry distilled gas into a dry distilled furnace combustion chamber to be used as fuels; carbonizing the surplus sludge into biological carbon; cooling the biological carbon by a cooling device, wherein the cooled biological carbon can be used as a soil conditioner; performing the treatment on the dry distillation furnace flue gas to produce steam through an afterheat boiler to ensure that the steam is used for heating the tempering tank; and performing desulfuration and dust removal on the flue gas recycled by the afterheat to ensure that the flue gas meets the discharge standard. The invention also discloses a corresponding system which consists of the tempering tank, a mixed solution centrifugal separator, a vacuum dehydrator, a condenser, a spiral conveyor, a dry distilled furnace, a cooler and a dry distilled gas purification device. According to the deep recycling process and the deep recycling system, the pollution treatment is realized, and precious resources are recycled, so that the recycling for resources is realized.

Circulating airflow drying device for pilot plant test

InactiveCN102494524AImplement the function of mixingImprove fitnessDrying gas arrangementsDrying solid materialsCycloneEngineering
The invention discloses a circulating airflow drying device for a pilot plant test. The drying device is characterized by comprising a material drying system which comprises an air blower, a circulating airflow drying pipeline, a spiral feeder, a primary cyclone separator, a secondary cyclone separator, a draught fan, a product screw conveyor and the like, wherein an x-shaped drying material distributor controlled by an opening or closing valve plate is arranged at an intersection of the circulating airflow drying pipeline and the cyclone separators; blanking openings of the primary and secondary cyclone separators are provided with an air lock valve respectively, and the air lock valves are connected with the product screw conveyor; and twelve ultrasonic atomizers for regulating the humidity of the airflow drying pipeline are arranged in an induced air box. The whole device has a complete system, and functions of controlling the flow of airflow, controlling the heating of the airflow, accurately controlling the feeding of wet materials, premixing and feeding dry and wet materials, recovering dry powder, measuring the humidity of a product, controlling a mixing ratio of dry and wet powder, automatically regulating and controlling moisture and the like can be realized.
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