3574 results about "Rotational flow" patented technology

The present invention belongs to an industrialization aquiculture field, particularly relates to a closed cycle water industrialized fish cultivating system. The system separates solid and liquid in a storage sedimentation basin and a backwater channel sedimentation and rotational flow pool sedimentation, the tiny particulate matter is separated and purified by a sandrock filtering bed of a one level biological filter based on the water particulate matter separation, the water purified by the one level biological filter is feed into a two stage biological filter, the biological film of biologic filling material in the one level and the two stage biological filters is degraded with ammonia nitrogen and azote nitrous acid, the total purifying rate of the water particulate matter reaches more than 99%, the culturing water is added with oxygen mechanically or by liquid oxygen, finally the water is disinfected and sterilized through a ultraviolet ray sterilizer, and the clean ecological water is feed into a fish pool, thus the waste water of the fish pool may be purified and used in repeat. The fish-cultivating system implements completely closed cycle water industrialized fish cultivation, the fish is out of a disease or less, and the fish survival is more than 80%.

The invention relates to a method of recycling valuable metals from arsenic-containing soot. The method comprises the following steps: (1) mixing acidic wastewater with white soot, controlling the pH value to 2.5-3.0, performing acid leaching at a temperature of 70-80 DEG C, and filtering to obtain leachate and lead slag; (2) replacing indium for the leachate by using zinc powder, and filtering to obtain indium slag; (3) performing rotational-flow electrodeposition arsenic removal and zinc removal on filtrate in sequence to obtain arsenic slag and zinc slag. The method disclosed by the invention can be used for purifying the acidic wastewater to reach a condition for recycling the acidic wastewater to a smelting acid manufacturing and purifying section, so that the treated acidic wastewater can be directly returned to the acid manufacturing and purifying section, and therefore, the gypsum slag is completely removed to truly achieve the purpose of zero emission. Meanwhile, the method disclosed by the invention can also be used for achieving the treatment of white soot and recycling the valuable metals, so that environmental protection and resource comprehensive utilization are achieved.

A prechamber spark plug may have a prechamber having a pre-determined aspect ratio and hole pattern to achieve particular combustion performance characteristics. The aspect ratio and hole pattern may induce a rotational flow of fuel-air in-filling streams inside the prechamber volume. The rotational flow of the fuel-air mixture may include both radial flow and axial flow characteristics based on the aspect ratio and hole pattern. Axial flow characteristics can include a first axial direction proximate the periphery of the rotational flow and a counter second axial direction approaching the center of the rotational flow. The radial and axial flow characteristics may further include radial air-fuel ratio stratification and/or axial air-fuel ratio stratification. The rotational flow, the radial flow and the axial flow may be adjusted by alteration of the aspect ratio and hole pattern to achieve particular combustion performance characteristics in relation to a wide variety of spark gap geometries.

The invention discloses a tangential premix and pre-evaporation combustion chamber. The combustion chamber has a single-ring cavity structure; and through a design by adopting a concept of staged combustion, combustion gas is totally supplied by a pre-combustion stage and a main combustion stage, wherein the pre-combustion stage adopts a steady-rotational flow diffusion flame combustion organization mode; and the main combustion stage adopts a premix and pre-evaporation combustion organization mode. The combustion chamber mainly comprises a flow-dividing diffuser, an outer casing of the combustion chamber, an inner casing of the combustion chamber, a fuel nozzle, the pre-combustion stage, the main combustion stage, a flame tube outer wall and a flame tube inner wall, wherein the pre-combustion stage stabilizes the flame by a low-speed return area generated by rotational flow air entering the combustion chamber from a pre-combustion stage swirler assembly; and the fuel needed by the main combustion stage is ejected from a nozzle of the main combustion stage, is atomized to form oil-gas mixed gas under the airflow action of a prefilming air ring of the nozzle of the main combustion stage, flows into a premix and pre-evaporation section to be evaporated, is further doped with the air to form a uniform oil-gas mixed air jet at an opening of the premix and pre-evaporation section to enter the flame tube, and is combusted under the ignition of a pre-combustion stage flame. The tangential premix and pre-evaporation combustion chamber has the advantages of simple structure and capacities of guaranteeing the normal working state of an aircraft engine and effectively reducing pollution discharge simultaneously.

The invention relates to a low-pollution combustion chamber with a premixed and pre-evaporated precombustion part, which adopts a monocylic cavity structure and comprises a pressure diffuser, an outer receiver of a combustion chamber, an outer wall of a flame tube, an inner wall of the flame tube and a combustion chamber head, wherein all air for combustion enters the flame tube from the combustion chamber head, a grade combustion scheme is adopted and comprises a precombustion grade and a main combustion grade ; the main combustion grade adopts a premixed combustion mode, and the precombustion grade adopts a mode of combining diffusion combustion with stable rotational flow and rotational-flow premixed combustion; and the precombustion grade adopts the mode of combining the diffusion combustion and the premixed combustion, and pollutant discharge under a small working condition is reduced without influencing stable combustion. In the invention, the precombustion grade structure is simple, and the pollutant discharge is reduced under a small working condition without influencing the combustion stability so as to ensure that the pollution discharge of the whole landing and take-off (LTO) of an aircraft engine combustion chamber is further reduced.

The invention discloses a layered part premixing low-pollution combustor of main combustion level premixing and pre-evaporation. The layered part premixing low-pollution combustor has a pre-heating function. Fuel oil is divided into a main combustion level and an on-duty level. Diffusive combustion is adopted by the on-duty level, lean oil premixed combustion is adopted by the main combustion level, and the premixed combustion of a layered part is achieved through coupling of the diffusive combustion and the lean oil premixed combustion. The on-duty level is composed of a centrifugal atomizing nozzle and first level rotational flow air. The fuel oil of the main combustion level is supplied through multi-point direct-injection type nozzles, and oil and air mixing is enhanced through preheating of second level rotational flow air by combination of transverse jet air and on-duty level flame. The on-duty level is used in part-load conditions such as starting and slow operation, a stable combustion range can be broadened, combustion efficiency can be improved, and emission of CO and UHC is lowered; the on-duty level and the main combustion level work at the same time in the heavy load working condition, the on-duty level provides stable ignition sources for the main combustion level, a main combustion area is in a lean oil state, the temperature is far lower than the adiabatic flame temperature, and emission of NOx of high-load conditions can be reduced remarkably.

The invention relates to an integrated diffusion oriented combustion chamber which adopts a full ring combustion chamber structure. The integrated diffusion oriented combustion chamber mainly comprises a crankcase, a combustion liner and an oriented diffuser. The oriented diffuser realizes pneumatic and structural coupling, controls the tangential flow direction and carries out diffusion and speedreduction, and a local return low-speed zone is formed, thereby being good for flame linkage and tangential stable combustion; grading combustion is adopted, and a pre-combustion grade can be selected to work alone and work together with a main pre-combustion grade according to work conditions; the pre-combustion grade utilizes the trapped vortex combustion technology for stable work, goes into amain combustion zone to inflame a main combustion grade through a contraction outlet, and provides a stable ignition source for the main combustion grade; fuel of the main combustion grade is injected to a main combustion grade airflow in the oriented diffuser, atomization evaporation mixing with short distance is realized, and combustible mixture gas with uniform mixing is provided for the maincombustion zone. The invention allows tangential rotational flow of a gas compressor to directly go into the combustion chamber so as to realize tangential highly efficient and stable combustion; in addition, the discharge of pollutants is low, pre-rotation is provided for a turbine, the structure can be simplified, the weight is lightened, and the densification of a gas turbine is realized.

A pump includes: a pump chamber for which a capacity is changeable; an inlet channel which allows a working fluid to flow into the pump chamber; an inlet side fluid resistance element disposed between the pump chamber and the inlet channel; an outlet channel which allows the working fluid to flow out of the pump chamber; and a pipeline element formed inside the outlet channel, wherein a rotational flow generation structure, which generates a rotational flow of the working fluid, is provided in the pump chamber, and wherein the outlet channel is located adjacent to the rotational center of the rotational flow.

The invention relates to a method and a device for purifying coal tar through coupling rotational flow, wherein the method for purifying the coal tar through coupling rotational flow comprises the following steps: (a) mixing coal tar feed with a trapping agent sufficiently so as to extract out saline matters dispersed in the coal tar; (b) performing liquid-liquid rotational flow separation on thecoal tar in which the dispersed saline matters are extracted out for separating out the saline matters so as to obtain desalinated coal tar; (c) keeping stand and depositing the desalinated coal tar so as to remove the moisture therein and obtain dehydrated coal tar; (d) performing solid-liquid rotational flow separation on the dehydrated coal tar so as to remove solid particles therein and obtain the coal tar without the solid particles; and (e) performing micro rotational flow separation on the coal tar without the solid particles so as to remove the micro moisture therein. The invention also provides a device for purifying the coal tar through the coupling rotational flow.

A method of capturing a Circulating Tumor Cell (CTC) from a sample includes introducing a sample into a microfluidic device having a cell capture surface and a flow modification surface under conditions that allow a CTC to bind to a cell rolling-inducing agent and a capturing agent disposed on the cell capture surface. The flow modification surface induces a rotational flow within the sample as it flows through the microfluidic device.

The invention discloses a supporting flow guide plate and a separation filtering membrane column device. The supporting flow guide plate is a disc with a central circular hole; a plurality of rings of flow blocking salient points are arranged on the disc; a radial rotational flow slit is also formed on the disc; one of two sides of the rotational flow slit of the disc upwarps to be extended into an upwarping part, and the other side is bent downwards to be extended into a lower bending part; and the upwarping part is parallel to the lower bending part. The separation filtering membrane column device comprises the supporting flow guide plate and a membrane; an inner pull rod for fixing the supporting flow guide plate and the membrane and upper and lower stacking plates are also installed in a bearing outer shell; a mounting hole is formed at the center of the membrane; a radial gap aligned with the rotational flow slit is also formed on the membrane; and an outer pull rod for supporting, tensioning and pressing upper and lower end cover flanges is installed outside the bearing outer shell. Compared with a traditional membrane component, the separation filtering membrane column device has the beneficial effects that the pressure loss is reduced by above 70 percent, and the product efficiency is improved. The separation filtering membrane column device is a special device with the advantages of antipollution and low energy consumption and is particularly suitable for an economical treatment process of a high-concentration fluid.

A detonation engine which creates thrust by generating a detonation wave, wherein the overall engine structure is simplified, and continuous output can be obtained, comprises: a rotational flow generation device which generates rotational flow about an axis in a mixed gas of air and fuel or of oxygen and fuel; a detonation chamber arranged downstream from the rotational flow generation device, formed in a ring-shape radially extended and continuous in the circumferential direction, which continuously combusts in the circumferential direction the mixed gas in which the rotational flow is generated to generate detonation waves, and draws it in from the radial inside and exhausts it to the radial outside; and a nozzle which is connected to the detonation chamber, and jets the high temperature and pressure combustion gas generated by the detonation waves flowing from the detonation chamber, to the rear while expanding it, and converts it into thrust.

The invention discloses a method and device for detecting fume denitration catalyst activity, belonging to the technical field of air pollution control of environmental engineering. In the method, a numerical control flowmeter is adopted to precisely adjust the main components of stimulated fume which enters a square-shaped stainless-steel reactor provided with the catalyst to be detected after passing through an efficient rotational flow mixer; an opened square three-segment furnace in a cavity structure is adopted to heat at constant temperature; an embedded temperature measuring device is adopted to measure the changes of the fume temperature in real time; and a reductant gas state NH3 is introduced, and the concentration changes of nitric oxide (NO) of the fume before and after the reductant gas state NH3 passes through the reactor are detected by a fume analyzer to obtain the activity of the catalyst. The device provided by the invention has a simple system, and is accurate in parameter adjustment, reliable in operation and high in experimental efficiency; and by the device, the activities of the catalyst can be dynamically stimulated and detected under different operation conditions, and the gap of the detecting technique of the domestic fume denitration catalyst is filled in.

The invention relates to a pipeline cleaning method and an adopted remote control rotary cleaning type pipeline cleaning robot. According to the method, a pipeline is sealed inside in a sectioned mode; high-pressure water/cleaning liquid is rotatably jetted to the inner walls of the sealed pipeline sections at first, then rotational flow is formed in the sealed pipeline sections through stirring of blades, and dirt adhering to the inner walls of the pipeline is forcefully removed through jetting, soaking and the rotational flow; and no damage is caused to the inner wall of the pipeline in the cleaning process. The method and the robot have the characteristics of being good in pipeline cleaning effect, high in practicability, low in device manufacturing cost and convenient to operate; by adopting the unique rotary cleaning mode, the dirt adhering to the inner walls of the pipeline can be completely cleaned, the agent utilization rate is high, and dosage is small; through the unique sectioned cleaning mode, pollution to other pipeline zones in the cleaning process can be avoided.

The invention discloses a preparation method of rice products with a low content of heavy metal. The method comprises the following steps of performing pulp mixing, performing enzymolysis, performing complexing, performing washing separation and performing drying treatment on rice flour or rice protein flour, so that the rice flour or the rice protein flour with a low content of metal is finally prepared. According to the method disclosed by the invention, an enzyme method and a chemical method are used, so that the heavy metal in the rice flour or the rice protein flour is dissociated out in a complexing manner; then solid-liquid separation is performed by a physical method of the stepwise gradient separation of rotational flow, so that the purpose of reducing the content of the heavy metal in the rice flour or the rice protein flour is realized, and a deeply processed product, namely the rice flour or the rice protein flour, with high quality and high added value is prepared. The method is simple to operate and low in cost.

The invention discloses a novel oxygen enrichment tiny-oil ignition and ultralow load stable-combustion combustor. The novel oxygen enrichment tiny-oil ignition and ultralow load stable-combustion combustor comprises an oxygen enrichment guide pipe, a primary air pipe, a cylindrical oil-coal mixed combustion chamber, a secondary air pipe, a secondary air box and a pre-combustion chamber, wherein the central axes of the primary air pipe, the cylindrical oil-coal mixed combustion chamber, the secondary air pipe, the secondary air box and the pre-combustion chamber coincide. A secondary air inlet inclining in the circumferential direction is formed in the pipe wall of the secondary air box; the primary air pipe penetrates through the secondary air box in the axial direction, the oil-coal mixed combustion chamber is coaxially arranged in the primary air pipe, and a high-energy tiny-oil ignition oil gun and the oxygen enrichment guide pipe are arranged in the oil-coal mixed combustion chamber; the secondary air pipe with a rotational flow impeller is coaxially arranged outside the primary air pipe in a sleeved mode and an outlet end is provided with a bluff body; the pre-combustion chamber is arranged in the secondary air box, the inlet end of the pre-combustion chamber is provided with a graded air duct, and a plurality of disturbance air nozzles are installed in an outlet of the combustor. The ignition fuel saving ratio reaches over 90% and the novel oxygen enrichment tiny-oil ignition and ultralow load stable-combustion combustor has the function of low load stable combustion and the function of ultralow load stable combustion; the technologies of oxygen enrichment, coal dust concentration, graded air feeding and the like are adopted, so that the novel oxygen enrichment tiny-oil ignition and ultralow load stable-combustion combustor has the advantages of being high in coal dust burn-off rate, low in NOx discharge and the like.

A mixer for a vehicle exhaust system includes an upstream baffle with at least one inlet opening configured to receive engine exhaust gas, a downstream baffle with at least one outlet opening configured to conduct engine exhaust gases to a downstream exhaust component, and an outer peripheral wall surrounding the upstream and downstream baffles and defining a mixer central axis. An intermediate plate is positioned between the upstream and downstream baffles to block direct flow from the inlet opening to the outlet opening. The intermediate plate initiates a rotational flow path that directs exhaust gases exiting the inlet opening through a rotation of more than 360 degrees about the mixer central axis before exiting the outlet opening.

The invention discloses a gyrating drilled shaft provided with an aeration ridge. The invention is characterized in that the gyrating drilled shaft is provided with an aeration ridge on the wall surface at the middle lower part of the drilled shaft section, the aeration ridge is formed by gradually shrinking the drilled shaft connected with the upper flat section of a flood discharging tunnel from the middle part to the middle lower part and then suddenly expanding the wall surface, and at least two aeration holes are distributed on the annular aeration ridge formed by the sudden expansion, each of the aeration holes is spliced with a vent pipe communicating with the atmosphere. The vent pipes can be selectively buried on the outer side of the gyrating drilled shaft. The gyrating drilled shaft disclosed by the invention enables near-wall water layers at the lower reaches of the aeration ridge to become into aerated water flows, thereby increasing the flow cavitation number, playing the effects of air entrainment and cavitation prevention, preventing the overflowing section at the middle lower part of the drilled shaft from being damaged by cavitation erosion, and ensuring the safe flood discharging operation of the gyrating drilled shaft.

The invention relates to a cyclone power coal burner used in the boiler of power station, wherein it comprises: oil gun, or central cylinder, 2-3 step power coal separator, the main nozzles of wedge groove and horn open; 2-3 air nozzles with cyclone generator and horn open, nozzles and gas inlet of central cylinder; at the surface of inner chamber of main nozzle, the inner and outer surfaces of separator, and at the surface of support plate, there are abrasion-resistant layer. The invention has better dense-thin separation effect, while the ratio between dense and thin is 3-7:1; the cyclone strength at 2-3 step nozzle is high with simple adjustment; the resistance of main nozzle is 1/3 of background technique to reduce 55-65% of energy consumption, with low nitrogen oxide discharge and stable burning.

The invention relates to a centrifugal pump and discloses a spiral flow constant-pressure pump in particular. The spiral flow constant-pressure pump comprises a pump shell and an impeller; wherein, an inner wall of the pump shell is arc-shaped; the impeller comprises a back cover plate and a plurality of front blades, wherein the back cover plate is provided with a hub part, and the front blades are positioned in the front of the back cover plate and formed as a whole with the back cover plate; each front blade bends towards the counter-clockwise direction and inclines towards the clockwise direction in the position close to the circular edge of the back cover plate so as to form a bent and inclined part with a certain included angle with the front surface of the back cover plate. The spiral flow constant-pressure pump of the invention enables liquid in a pump chamber to generate longitudinal flow towards the direction of a pump front cover, and has rotational flow at the same time, thus forming a spiral flow in the pump, so that liquid flow enter the space between the front blades for a plurality of times and the pressure of the space is lifted; compared with the prior spiral flow constant-pressure pump, the pressure of the pump outlet is higher and more stable.

The invention discloses a low-pollution combustion chamber with a main combustion stage adopting single-layer pre-film radial two-grade reverse rotational flow. The low-pollution combustion chamber adopts a single annular cavity structure, and comprises a diffuser, a combustion outdoor box, a combustion indoor box, a flame cylinder outer wall, a flame cylinder inner wall and a combustion chamber head part; the combustion chamber adopts a classification combustion scheme; the combustion head part is divided into a pre-combustion stage and the main combustion stage; the pre-combustion stage adopts a mode of combining rotational flow-stable diffusion combustion with rotational flow premixing combustion; the combustion mode reduces the pollutant discharge under small working conditions when not influencing stable combustion; and the main combustion stage adopts a premixing pre-evaporation combustion mode to be in favor of uniform combustion. The combustion chamber adopts a center classification structure; the pre-combustion stage is simple in structure; the main combustion grade adopts a two-grade reverse cyclone distributed in the radial direction; and two parts of reverse rotational flows shear an oil film, so that the atomization effect is greatly improved, the atomization of fuel of the main combustion stage and the mixing with air are enhanced, the premixing pre-evaporation of the fuel is reinforced, and the pollution discharge of whole landing and taking-off circulation of an aero-engine combustion chamber is further reduced.