126results about How to "Fluid stability" patented technology

The present invention relates to cavity type solar energy receiver for tower type solar energy electricity generator, and belongs to the field of solar energy utilizing technology. The solar energy receiver includes concave heat absorbing cavity, inwards notched glass window for receiving sunlight, work fluid inlet pipe and work fluid outlet pipe connected to the heat absorbing cavity, ring cavity around the glass window and connected to the work fluid inlet pipe, and needle tubes arranged regularly onto the surface of the glass surface and connected to the ring cavity and the heat absorbing cavity. When the work fluid flows through the heat absorbing cavity, it is heated while cooling the glass window.

The invention provides a method for reducing difference of the two sides of paper. The paper is designed to be of a multilayer fiber layer structure; the pulp preparing and beating of each fiber layer are realized independently; a pulp material enters a paper machine with multiple independent flow channels, and is formed in forming areas through simultaneous stacking and paper manufacturing with pulp, wherein the content of fine fibers of which diameters are smaller than 1 micron in the pulp material I entering a flow channel closely adjacent to a forming net is higher than that of fine fibers of pulp material in other layers, and preferably, the content of the fine fibers in the pulp material I is 5-10% higher than that of the fine fibers of the pulp material in other layers. The invention further provides the paper which has low two-side difference, and is prepared by the method, in particular to a glass fiber paper with low two-side difference as well as a coalescent filter element comprising the glass fiber paper with low two-side difference. According to the glass fiber paper with low two-side difference, provided by the invention, the density of fibers in the paper thickness direction is uniform, so that the efficiency and a separation capability of the coalescent filter element can be remarkably improved.

The invention provides a polymer melt shear vibration extrusion molding device which comprises an extruding machine 13, an extrusion head 1 connected with the extruding machine through a flange plate, a mouth mould 12, a stock mould 14, a cooling water tank 15, a traction device 16 and a cutting device 17, and is characterized by further comprising a crank connecting rod shear vibration system 18 and a melt runner vibration chamber 2, wherein the crank connecting rod shear vibration system 18 is arranged above the extrusion head 1; the melt runner vibration chamber 2 is arranged inside the extrusion head 1; the crank connecting rod shear vibration system is composed of a crank connecting rod mechanism and a reciprocating vibration rod 3; the reciprocating vibration rod 3 is positioned in a through hole 9 formed in the extrusion head 1; the through hole 9 is communicated with the melt runner vibration chamber 2. The device provided by the invention not only can simultaneously promote polymer molecule chain orientation, shish-kebab structure generation and polymer crystalline grain refinement, and improve mechanical property of products, but also can reduce extrusion resistance and improve production efficiency.

The invention relates to a CO boiler having the dustproof function and the denitration function. The CO boiler having the dustproof function and the denitration function comprises a flue, a combustion chamber, steam drums, an evaporation section and an economizer section. The CO boiler further comprises an ammonia spraying and mixing mechanism and a dustproof denitration reactor. The ammonia spraying and mixing mechanism is arranged above the evaporation section or between the evaporation section and the denitration reactor. The dustproof denitration reactor is arranged between the evaporation section and the economizer section and comprises a mixed-smoke inlet section, a denitration section and a purified-smoke discharging section, wherein an ash removal section is arranged between the mixed-smoke inlet section and the denitration section, ash baffles are arranged in the ash removal section, an ash bin is arranged in the denitration section, the center line of the ash bin and the center line of the reactor coincide, and the lower end of the ash bin is connected with an ash discharging pipeline. According to the CO boiler having the dustproof function and the denitration function, the denitration reactor is arranged in the CO boiler, so that the utilization rate of smoke heat is increased; due to the fact that the ash removal section is arranged in the reactor, smoke dust of mixed smoke can be removed before the mixed smoke enters denitration units, catalyst hole channels are prevented from being blocked, and the denitration efficiency and the denitration effect are improved.

The invention relates to a 1/4 elliptic cone conical table eddy eliminating device and method for a closed intake pool. The device comprises a closed intake pool, and a water pump and a horn pipe mouth mounted in the closed intake pool, wherein a water guide cone is arranged on a baseplate of the intake pool right below the horn pipe mouth. The device is characterized in that the water guide cone is a 1/4 elliptic cone conical table; the distance from the 1/4 elliptic cone conical table to the back wall of the closed intake pool is equal to the diameter of the horn pipe mouth; the height of the 1/4 elliptic cone conical table is 2/5 of the diameter of the horn pipe mouth of the water pump; the cone bottom diameter of the 1/4 elliptic cone conical table is equal to the diameter of the horn pipe mouth of the water pump; the cone top diameter of the 1/4 elliptic cone conical table is 7/25 of the diameter of the horn pipe mouth of the water pump; and the elliptic cone section of the 1/4 elliptic cone conical table is 1/4 of an elliptic cone. The device is reasonable and simple in structure, easy in manufacturing and convenient to use, and enables the section flowing speed of water currents entering the water pump and the pipe to become uniform by rectifying currents and adjusting the pool bottom speed.

The invention discloses an open flow passage type rotating nozzle capable of being applied to ground covering, and belongs to the field of irrigation equipment. The nozzle comprises a ground covering mechanism and a spray irrigation mechanism, wherein the spray irrigation mechanism comprises a water inlet pipe, a rotating platform, a plurality of connecting columns and a spinning nozzle; the spinning nozzle comprises a plurality of arc pipelines and taper baffles; longitudinal arc openings are formed in the side walls of the arc pipelines, so that a cavity of each arc pipeline forms an open flow passage; the bottoms of the arc pipelines are connected with one another in a closed way, so as to form a taper bottom of the spinning nozzle; a longitudinal jet hole is formed in the taper bottom; the tops of the arc pipelines are divergent outward from the taper bottom along the radial direction; a taper baffle is connected with a position between the end parts of the side walls of each two adjacent arc pipelines. Each arc pipeline is warped for a preset angle in the same direction. The rotating platform is rotationally sleeved to the water inlet pipe; the plurality of connecting columns are fixed between the rotating platform and the taper baffles; the longitudinal jet hole is opposite to the upper pipe orifice of the water inlet pipe; the water inlet pipe is connected with an underground water inlet pipeline through the ground covering mechanism. The nozzle can increase the range under low pressure.

The invention discloses an aerated flip bucket arrangement structure suitable for a high water head flood discharge hole. An aerated flip bucket is arranged behind a flood discharge hole current control gate by 1-2 times of the hole diameter of the flood discharge hole; and the two sides of an opening of the aerated flip bucket are outwards expanded suddenly to increase the through-flow section of the flood discharge hole. A gate-bucket split type aeration technical scheme, provided by the invention, can thoroughly eliminate a clear water area behind the aerated flip bucket, so that an aerated cavity is not influenced by the openness of the gate any more; and no matter the opening mode of the gate, the flowing state of water current is clear and stable, so that the cavitation resistance of the arched gate is largely improved, and the operation flexibility of the gate is largely improved.

The invention discloses a CO boiler having the ash removal function. The CO boiler having the ash removal function comprises a first vertical flue, a horizontal flue and a second vertical flue, wherein ash baffles are arranged at the connection position between the first vertical flue and the horizontal flue, an ash storage bin is arranged at the position, flush with the lower edge of the lowest ash baffle, of the inner side of the first vertical flue, the ash baffles are of the structure that multiple layers of baffles are arranged in a staggered mode, each ash baffle is arranged in an inclined mode, and the outer end of each ash baffle is higher than the inner end of the ash baffle. According to the CO boiler having the ash removal function, the ash baffles arranged in the CO boiler can remove most of smoke dust contained in smoke and also play a role in rectifying the smoke, so that the smoke is rectified into the stable horizontal laminar flow state, the smoke evenly passes through steam drums, and the heat exchange efficiency of the boiler is high. The CO boiler having the ash removal function can solve the problem of equipment wear and abrasion caused by the smoke dust to the maximum extent, optimize the smoke processing technology, reduce energy consumption and reduce investment.

The invention relates to a device for increasing the transportation resistance of slurry in a filling pipeline in a small time line high pressure head mine filling system, and discloses a device for increasing the resistance and regulating the pressure in filling slurry pipeline transportation. The problem that the local pressure in filling slurry pipeline transportation is too large is solved in a mode of increasing the resistance loss of the slurry in the pipeline. The input end and the output end of the device for increasing the resistance and regulating the pressure are both connected to the pipeline for transporting the filling slurry, and the horizontal height of the input end of the device for increasing the resistance and regulating the pressure is larger than that of the output end of the device for increasing the resistance and regulating the pressure. The device is simple in technological process and convenient to install, and the flow state of mortar in the pipeline is stable.

The invention discloses a closed type open commutator which comprises a control box provided with a component for supplying power for commutation, a rotating disk which is positioned below the control box and is provided with a plurality of nozzles, a floating disk which is matched with the rotating disk and is provided with diversion holes corresponding to the nozzles, and a water feeding pipe positioned at the center of the open commutator, wherein a diversion cone is arranged above the water feeding pipe. The commutator disclosed by the invention has a steady commutation process and is high in symmetry and repetitiveness; the flowing state of fluid is stable and symmetric as much as possible at outlets of the nozzles; water sputtering and internal leakage of the commutator are avoided, and interference caused by the commutation process on the flow of a flow device system is also avoided.

The invention provides a stepped energy dissipation method and an energy dissipater through aerification in pre-positioned aerification tanks. The method comprises the steps as follows: the aerification in pre-positioned aerification tanks and stepped energy dissipation are sequentially performed on a water outflowing tongue repeatedly to enable the water outflowing tongue to be led into one aerification tank, then the water outflowing tongue forms aerification rotating and rolling in the aerification tank and full aerification is performed, and a stepped discharge chute is utilized to perform stepped energy dissipation on the water flow after full aerification. The energy dissipater comprises the aerification tanks which gradually descend in position and have the same quantity with graded stages, stepped discharge chutes are connected to the back of the aerification tanks, and pre-positioned steps are connected to the upstream ends of the aerification tanks, so that a complete one-stage energy dissipater is formed. Then in the next-stage energy dissipation, the structure is repeated. According to the invention, a higher energy dissipation rate can be kept and cavitation and cavitation erosion damage to the structure can be avoided under large discharge per unit width, and requirements of the engineering on energy dissipation and safety can be met.

The invention discloses a re-improved L-shaped pitot tube for measuring flow velocity of fluid. According to the re-improved L-shaped pitot tube, the semispherical, semielliptical spherical or cone frustum-shaped section of the measuring head, which is used for measuring the total pressure, of the conventional L-shaped pitot tube is changed to be a section of small straight pipe, and a section of conical tube with a small taper angle or both a conical tube and an elliptic conical tube is/are connected between the small straight pipe and the small straight pipe of the pitot tube for transition. According to the invention, since the area of the measuring head is greatly reduced, and vortexes formed in front of the measuring opening can be reduced, so that the total pressure is measured more accurately, and higher flow velocity can be measured; since the measuring head becomes smaller, the conical tube with the small taper angle is adopted for transition, and fluid outside the tube is more stable, static pressure is measured more accurately; since the external diameter of the pitot tube is extremely small, and interference to the state of fluid in a measured tube is reduced, smaller air ducts can be measured, and the measurement range is enlarged.

The invention discloses a hydrotreating method for heavy hydrocarbon raw materials. According to the invention, a fixed bed hydrogenation reactor is employed; at least two catalyst beds are arranged in the fixed bed hydrogenation reactor; a solvent is introduced at least from one gap formed by two adjacent catalyst beds and is mixed with reacting materials, and light components are extracted; the light components are introduced out from the reactor in an extraction and separation area between two adjacent catalyst beds, and heavy components enter into next catalyst bed for further reaction; extracted oil can directly enter into a gasoline/diesel hydrogenation device so as to obtain qualified gasoline/diesel and can also enter into an FCC main fractionating column for fractionation so as to obtain a crude product which enters into the gasoline/diesel hydrogenation device so as to obtain qualified gasoline/diesel. The method provided in the invention can effectively reduce pressure drop of beds in fixed bed hydrotreatment, prolong the service life of a catalyst, improve a total conversion rate of a fixed bed hydrogenation apparatus and enhance treating capacity of an apparatus under the condition of a same conversion rate, thereby creating greater benefits for an enterprise.

The invention belongs to the field of centrifugal pump devices, and particularly relates to a second-level cantilever type small flow centrifugal pump. The second-level cantilever type small flow centrifugal pump comprises a pump body, wherein the front end of the pump body is provided with a front pump cover, and the rear end of the pump body is connected with a motor through a bracket; the pump body is internally horizontally provided with a pump shaft, and a motor shaft is sleeved with the pump shaft; the pump shaft is axially provided with a first-level impeller and a second-level impeller, the pump cover is internally provided with a suction inlet which corresponds to the pump shaft, and the suction inlet is internally provided with an inducer; a guiding body is arranged between the first-level impeller and the second-level impeller, the inducer and the guiding body are both arranged on the pump shaft, and the periphery of the pump body is provided with a discharge opening. The second-level cantilever type small flow centrifugal pump provided by the invention has the advantages that the structure is simple, the manufacture is easy, a flow state is stable, and the pressure is constant without fluctuation; a condition that a working condition is stable is guaranteed, and the flow is exact; due to the universality and interchangeability design, the spare part storing and managing cost and the comprehensive operating cost of the pump are reduced, and the second-level cantilever type small flow centrifugal pump is a novel replacing product in the field of small flow centrifugal pumps based on unique durability, reliability and economy.

The invention discloses a fish clustering effect and fish swimming trajectory model testing system. The system comprises a water tank, a water inlet pipe, a gradient pipeline, three arc-shaped plates,a water supplementing area, a long straight partition plate, a fish collection channel, four fish blocking nets, a reservoir, a fountain submersible pump, grid lines, a drain pipe and the like. By means of the testing system, the movement loci of fish and cognition of the fish clustering effect and swimming trajectory under different current gradient changes can be observed clearly; by means of flow field measurement, fish movement pictures and record data, the response regularity of fish migration and clustering behaviors for hydraulic characteristic factors can be explored, and test data and theoretical basis are provided for mining the response relationship between the water velocity and the fish migration and cluster behaviors in further depth; meanwhile, the defects that in the priorart, research on the current gradient is deficient and the testing process is unstable are overcome. The system is simple in structure and convenient to operate; the water resource is recycled, and the migration area is reduced while the water resource is saved.

The invention discloses a flow channel outlet structure, particularly relates to the flow channel outlet structure of a flood discharge surface hole of a high arch dam, and belongs to the technical field of civil design construction. The flow channel outlet structure is capable of forming nappe which is fully stretched in a longitudinal direction and has a stable flow state in a transverse direction. The flow channel outlet structure comprises a flood discharge flow channel with a bottom plate formed by an arch dam and a side wall formed by a dam pier, wherein the side wall is linearly shrunk inwards in the longitudinal direction and the tail end of the bottom plate is positioned on the inner side at the tail end of the side wall.

The invention relates to a water-supplementing fishway inlet device with an ecological gate, and belongs to the field of ecological environments for water conservancy projects. The water-supplementing fishway inlet device with the ecological gate is composed of the ecological gate, two water-supplementing port retaining walls, an energy dissipation grating, three fishway inlet sidewalls, two control gates, two fishway inlets, a force dissipation pool, a force dissipation ridge, a gate water-supplementing port, a water outlet port, two fish-collecting retaining walls, a broken line retaining wall and the like. During running of the device disclosed by the invention, a discharged water flow of the ecological gate enters a downstream position through the force dissipation pool, the gate water-supplementing port and the energy dissipation grating, and is converged with a water flow at the water outlet port to form a fish-luring water flow for luring fishes to enter a fishway; and a downstream main flow of the ecological gate is away from a fish-luring channel under the action of the broken line retaining wall, so that conditions in the fish-luring channel meet the upstream sailing of the fishes. The device disclosed by the invention has the advantage of a large adaptation range of water level changes, and moreover, water consumption is reduced, and lots of water resources are saved; and water-supplementing, fish-luring and fish-passing facilities are integrated, thus the fish-passing efficiency is greatly improved.

A reciprocating pin-screw extruder with conic screw bolt whose spiral threads in the extruding out and mixing segments are periodically divided into 4 spiral plates alternatively staggered is composed of extruding system and drive system. The gap between every two spiral plate is used as the channel of pin. Its drive system has a drive box consisting of input shaft, gear set, inclined wheel, connecting rod and swinging axle. Its advantages are stable flow state of material, high effect and low energy consumption.

The invention discloses an intelligent energy-saving fan system based on a three-dimensional flow impeller, and relates to the technical field of intelligent fan systems. The intelligent energy-savingfan system comprises a fan frame; one side in the fan frame is fixedly connected with an air inlet cavity; the three-dimensional flow impeller is arranged on the side, far away from the fan frame, ofthe air inlet cavity; the end, far away from the air inlet cavity, of the three-dimensional flow impeller is fixedly connected with a first rotary shaft; the end, far away from the three-dimensionalflow impeller, of the first rotary shaft is fixedly connected with a second rotary shaft; the second rotary shaft penetrates through the fan frame and extends out; the right side of the outer wall ofthe fan frame is fixedly connected with a ventilation cavity; the inner wall of the ventilation cavity is fixedly connected with an air cavity reinforcement pipe; and the interior of the air cavity reinforcement pipe is fixedly connected with a power motor. By means of the intelligent energy-saving fan system based on the three-dimensional flow impeller, the problems that the efficiency of a fan is low, fan and system characteristics are not matched, the fan operates off a high efficiency area, the operating efficiency is low, and valve resistance loss is very high by utilizing a baffle and avalve for throttling are solved.

The invention discloses a high-temperature, high-pressure and high-flow-velocity H2S/CO2 moisture environment corrosion simulation loop system. The loop system comprises a high-temperature and high-pressure kettle and a loop pipeline; an inlet and an outlet of the loop pipeline are communicated with the high-temperature and high-pressure kettle to form a loop system; the loop pipeline comprises ahigh-flow-velocity test section and a low-flow-velocity test section, and the high-flow-velocity test section is close to the gas phase outlet end of the high-pressure and high-temperature kettle; andaxial flow fans, Laval tubes with heating coils, gas flowmeters, corrosion probes, thermocouples, thermoelectric refrigeration devices, corrosion monitoring sections and sample mounting sections arearranged in the high-flow-rate test section and the low-flow-rate test section. The simulation loop system can accurately simulate the real corrosion environment in the submarine natural gas pipeline,such as temperature, pressure, flow velocity, pipeline top condensation and the like, and has the functions of corrosion electrochemical monitoring and physical coupon mounting; and the method has important significance for researching the corrosion law and mechanism of the submarine pipeline material and evaluating the applicability of the anti-corrosion agent.

The invention discloses a detachable high-precision continuous sediment-taking bed load sediment discharge measuring device. The device mainly comprises a sediment collection inner cylinder and a sediment collection outer cylinder, wherein the sediment collection outer cylinder is positioned below the sediment collection inner cylinder; a circular turning plate is arranged inside the sediment collection inner cylinder; the sediment collection inner cylinder is divided into an upper sediment collection layer and a lower sediment taking layer; the circular turning plate is connected with a rotating shaft outside the sediment collection inner cylinder; the circular turning plate is turned by the rotating shaft; a water inlet and air outlet guide pipe is arranged on the cylindrical wall of the sediment collection inner cylinder, positioned below the circular turning plate and connected with the tail of a water tank through a connecting rubber hose; the lower part of the sediment taking layer of the sediment collection inner cylinder stretches into the sediment collection outer cylinder; the sediment collection outer cylinder is gradually closed so as to form an inverted cone frustum; a circular baffle is further arranged at the bottom of the inverted cone frustum. According to the device, the bed load sediment discharge of uniform/non-uniform sediments can be accurately measured.

The invention discloses a microbubble static modularized flotation device. The device comprises a plurality of tanks integrally communicated with each other; a plurality of flotation units are evenly and symmetrically in any one tank; a feeding pipe for feeding materials to the flotation units in the first tank at the side edge of the first tank, and correspondingly, a tailing opening for discharging tailings is formed at the side edge of the last tank; concentrate collecting grooves are further distributed between the floatation units and on the two sides in the direction of the feeding pipe in any tank; a swirl injection device is mounted at the bottom of any flotation unit, and a fairing for dispersing the flow direction of gas-bearing ore pulp is arranged on the upper part of the injection orifice of the swirl injection device in any flotation unit; a spraying device for promoting concentrate foam to move towards the concentrate collecting groove is arranged next to the concentrate collecting groove on the upper part of any flotation unit. A rectifying plate for stabilizing the flow state of the flow field is further mounted on the middle upper part of any tank. The microbubble static modularized flotation device is simple in structure, efficient and energy-saving, high in treatment capacity; as a result, the flotation efficiency is greatly improved.

An omnidirectional flow making pipeline system of an underwater vibrating platform relates to the technical field of simulating testing of vibrating platforms in areas such as civil engineering and water conservancy and a flow field. A streamline type structure is utilized and controlling by a shutter and glow guiding blades and the like realizes omnidirectional flow making of a testing pool. Secondly, an L-shaped converge area can flowing-out and returning of a water flow in a transverse direction, and can ensure flowing-out and returning of the water flow in a longitudinal direction. Thirdly, the flow guiding blades and the baffle plate can effectively realize testing area dividing and water flow direction control in the testing area. Under a precondition of flow making in different directions, high-efficiency pool utilization is realized. Finally, a bidirectional through-flow pump is utilized and is configured at the lower layer of a flow making pool. A whole flow length of outgoingwater and effective flow controlling can be ensured, and a requirement for omnidirectional flow making is satisfied. Through cooperation of the functions and the underwater vibrating platform (platform array), an earthquake-water power coupling testing of an ultra-large and ultra-long structure can be realized, and furthermore quick and high-efficiency loading of different water flow directions is ensured.