31 results about "Upflow velocity" patented technology

The invention relates to an integrated coking wastewater/excess sludge synchronous treatment method and an integrated coking wastewater/excess sludge synchronous treatment device. A double expanded granular sludge bed reactor is used in the process of treating coking wastewater, the micro oxygen state in the reactor is maintained through appropriate aeration, the moderate growth of filamentous fungi in the reactor is promoted, and moderate expansion of granular sludge is formed; a high liquid upflow velocity in the reactor is maintained in a mode of combining effluent external reflux with sludge internal reflux, and conditions are created for the moderate expansion of a granular sludge bed by combining a large amount of gas generated in the reactor; meanwhile, the dominant culture of efficient strains capable of synchronously and efficiently treating the coking wastewater and excess sludge in the double expanded granular sludge bed reactor is promoted, the coking wastewater and the excess sludge are synchronously and efficiently treated, and high biomass energy of a system is realized.

A hydrocarbon lift system and method for increasing petroleum production from an enclosed subterranean reservoir to the earth's surface comprises a column of buoyant balls in an outer pipe configured to entrain the buoyant balls into a first fluid in an annulus formed with an inner pipe drill string. A pressure differential in the inner pipe with respect to the reservoir via the entrained buoyant balls in a second fluid therein lifts the second fluid and the entrained balls via the inner pipe to increase petroleum production to the earth's surface. A controlled rise velocity of the buoyant balls and the second fluid is predetermined by a ratio of a mass density of the buoyant balls to a mass density of the second fluid being greater than a mass density of the buoyant balls to a mass density of the first fluid for an increase over time in oil production.

The invention discloses a method to advanced treat and recover the industrial sewage, which comprises: taking high-efficiency aerobic circulation biological expansion bed water treatment to the two-stage biochemical treated outlet water with aerobic biological reaction tower as main; leading the sewage into reactor through distribution-water device arranged on tower bottom; taking biochemical treatment with the distribution-gas device and microbe on surface of light biological particle carrier on aerobic bed unit; controlling the rising speed of flow in tower to achieve need expansion state; entering filter pond or pressure filter pond to remove the suspension, and outputting water come up to the advanced treatment request. This invention can satisfy different request for recovery water quality by selecting variable device combination.

The invention relates to the technical field of waste gas treatment equipment, especially to an industrial harmful waste gas treatment device based on a VOC biological method. The device comprises a treatment chamber and an activated sludge chamber, wherein a porous filler layer is arranged at the inner upper end of the treatment chamber; a liquid inlet pipe is arranged between and communicates with the treatment chamber and the activated sludge chamber; the bottom ends, located in the treatment chamber, of liquid inlet manifolds communicate with a plurality of evenly-distributed spray heads;a heat exchange chamber is arranged at the bottom end of the treatment chamber; and a quantity-controlling gas inlet mechanism is arranged in the treatment chamber. According to the invention, a heatexchange coil and the heat exchange chamber are arranged and matched with each other to cool high-temperature waste gas, so the rising speed of the waste gas in the treatment chamber is reduced, and the mass transfer time of waste gas and spraying liquid is prolonged; and quantitative gas inflow and quantitative gas outflow of large-flow waste gas are achieved by arranging the quantity-controllinggas inlet mechanism.

The invention discloses an environment-friendly waterborne NBR coating material waste-heat utilization and material recycling preparation device in the technical field of waterborne NBR. The device comprises a drying kettle, a degasifying kettle and a polymerizing kettle; a servo motor is mounted on the right side of the connecting position of the outer wall of the top of the degasifying kettle and a steel tube; an auxiliary gear is mounted at a power end of the top of the servo motor; a driven gear is fixedly arranged on the outer wall of the steel tube in a sleeving manner; the annular outerwall of the polymerizing kettle is wound with a coiled pipe; two groups of U-shaped pipes are perpendicular to each other; the inner cavity of the polymerizing kettle needs to be subjected to a heating reaction; flowing air in the cavities of the U-shaped pipes and the coiled pipe can adsorb heat, and the heat is transferred into the inner cavity of an air heating box; the air in the inner cavityof the air heating box is fed into the U-shaped pipes to heat the inner cavity of the polymerizing kettle through a first air pump and an air pipe; and when a spiral heat exchange pipe is heated, andmeanwhile, the temperature rising speed of inner cavity of the polymerizing kettle can be accelerated, so that the efficiency of a polymerization reaction is improved.

The invention provides a combined aeration treatment device for chemical sewage, which comprises a tank body, an aeration mechanism is arranged in the tank body, a bottom plate is connected to the inner wall of the tank body, a sleeve is rotatably connected to the inner wall of the top of the tank body, a stirring mechanism is connected to the outer wall of the sleeve, a threaded rod is rotatablyconnected into the sleeve through a first bearing, the bottom of the threaded rod is rotationally connected into the bottom plate, the outer wall of the top of the tank body is connected with a motor,the output end of the motor is connected with a rotating shaft, the outer wall of the rotating shaft is connected with a first gear and a second gear, and the second gear is a half gear. According tothe invention, large bubbles can be conveniently divided into small bubbles, the rising speed of the bubbles in the wastewater is slowed down, the mixing efficiency of the bubbles and the wastewaterin the same time is increased, and the small bubbles can more quickly dissolve oxygen into the water so as to improve the concentration of dissolved oxygen, so that the sewage treatment effect is improved, and the cost is lower.

The invention relates to a cutting-suction hydraulic-fill/filling damming method for ash storage yards in power industry. The method includes the steps of treating a dam foundation and a dam abutment; laying a seepage pipe system on the dam foundation; installing an underwater ash delivery pipe system, an ash dredger and an overwater ash delivery pipe system according to a dam design drawing; building a plurality of hydraulic fill pond ridges on the dam foundation; making and delivering mud; filling a hydraulic fill pond; separating ash and water; mechanically tamping; and performing multilayer hydraulic filling to the hydraulic fill pond till filling of a dam is complete. The multilayer segmental hydraulic fill pond ridges are built first, a small cutter-suction ash dredger is used with a slurry pump to mix grey water and fly ash in an ash storage yard into slurry which is delivered to the hydraulic fill pond of the dam, an ash dam forms after ash and water separate and solidify, the dam solidifies for three-dimensional drainage, ash-water separation and solidification are fast, water waste is low, dam building speed is high, construction period is short, safety is high, waste is utilized, and service life of the ash storage yard is prolonged. In addition, lift is avoided, pollution is avoided, construction is environment-friendly and the method is highly applicable.

According to the technical scheme, the micro-nano bubble ozone adding device is characterized by comprising an adding tank used for containing sewage needing to be subjected to catalytic oxidation treatment; the ozone generator is used for providing ozone; the mixing pump is used for mixing the sewage pumped out of the feeding tank with the ozone sent out by the ozone generator; the bubble generator is used for enabling ozone in the sewage and ozone mixture to form micro-nano bubbles and feeding the sewage and ozone mixture into the feeding tank; the blocking mechanism is arranged in the feeding tank and is used for blocking the micro-nano bubbles from floating upwards; by arranging the bubble generator and the blocking mechanism, the ozone can generate micro-nano bubbles, the rising speed of the micro-nano bubbles can be reduced, and the utilization rate of the ozone is increased.

The invention discloses an impeller lotus leaf drainage decompression casting system and a casting process thereof and relates to the technical field of impeller casting. According to the impeller lotus leaf drainage decompression casting system and the casting process thereof, a large amount of gas is prevented from rolling to form oxides in the metal liquid casting process by controlling the moisture, the compactness, the strength, dust, the mesh number, the air permeability, the burning loss and the hardness of molding sand; the high-temperature molten metal scouring resistance of the surface of a sand mold cavity is enhanced, the high-temperature and high-pressure airflow scouring resistance of the surface of the sand mold cavity is enhanced, and the crack resistance of the coating of the cavity is ensured; casting of a casting is completed within 16 s, the rising speed of metal liquid in the sand mold cavity is effectively controlled, and the too long scouring time of high-temperature and high-pressure metal liquid and airflow on the surface of the mold cavity is avoided; and casting defects of air holes, cold shut, cracks, slag inclusion, wrinkles and the like caused by excessive double-layer oxide film slag inclusion are inhibited by effectively controlling the flowing speed of the metal liquid entering the mold cavity and the internal flowing speed of the metal liquid in the mold cavity.

The invention discloses an ecological flame-retardant antistatic fabric resistant to water pressure and permeation and a production method of the fabric. According to the fabric, the formaldehyde content is smaller than or equal to 75 mg/kg, afterflame time is shorter than or equal to 2 seconds, smoldering time is shorter than or equal to 2 seconds, the damaged length is smaller than or equal to 10 cm, water pressure resistance is larger than or equal to 9 kpa when the ascending velocity of a water column is 10 cm/min, the liquid permeation amount is smaller than or equal to 5 ml in 24 hours for permeation resistance, and the specific surface resistance is smaller than or equal to 800 ohm. The process is simple, the requirement for a production machine table is not high, production is convenient, sewage is hardly discharged in the whole production process, no harmful gas is emitted, and the requirements for energy conservation and emission reduction are met.

The invention provides an ultrahigh dissolved oxygen water treatment method and system for a sludge thickening tank, wherein ultrahigh dissolved oxygen water is fully and uniformly mixed with wet sludge in a sludge inlet pipeline by utilizing a pipeline mixer, so that nanoscale dissolved oxygen is injected into the bottom of the sludge thickening tank together with the sludge through the sludge inlet pipeline; under the condition that no visible bubbles disturb the bottom sludge, the respiratory action of microorganisms in the sludge thickening tank is promoted to digest the sludge, the anaerobic phosphorus release of phosphorus-accumulating bacteria in the sludge thickening tank is inhibited, and the odor is eliminated. The characteristics that the particle size of oxygen bubbles in the ultrahigh dissolved oxygen water is extremely small and the rising speed is extremely low are utilized, and the oxygen mass transfer efficiency of the sludge can reach 85-96%, so that the sludge fully participates in biochemical reaction of microorganisms and bacterial colonies in the tank. Compared with a traditional aerobic digestion mode, the operation energy consumption is reduced by 40% or above, and meanwhile, the treatment time is only 1/20 of that of the traditional mode. According to the invention, the discharge amount of dry sludge can be effectively reduced, and the MLVSS of discharged sludge is obviously reduced.

The invention discloses a tailing dry type recovery method of a valley type tailing pond based on underground water drainage. The method specifically comprises the following steps that recovering thewhole tailing pond is completed through investigation and geological survey of the tailing pond, division of a recovery area and determination of parameters, laying of a transportation road, adoptinga reverse excavation mode and setting of a drainage open ditch. According to the method, the drainage open ditch is excavated for drainage, the ditch is excavated by a wetland excavator, a drainage platform is ahead of a recovery platform by two layers, the drainage safety and the timeliness can be guaranteed, the engineering quantity can be directly used as the extraction quantity, the drainage and the recovery work are closely connected, the investment facility equipment is simple, the road in the tailing pond is directly paved with tailings, the time is saved, the convenience is realized, and the entry and the secondary dumping of different materials are avoided; and therefore, the recovery speed of the tailing pond is accelerated, the mining period is shortened, and the problem that the effective working time of traditional dry type recovery is short is solved. The lifting speed of the bearing capacity of the tailing pond foundation is accelerated, so that the tailing recovery workof the tailing pond is completed quickly and efficiently on a large scale.

The invention discloses a hydraulic energy equation flow velocity measurement experiment device and method. The device comprises a flow regulating valve, a water outlet pipe, a porous sieve plate, a floating ball, a water return pipe, a water stop valve and a water storage container, the flow regulating valve is arranged on the water outlet pipe, the water storage container is arranged below the water outlet pipe, and the top of the water storage container is open; water flowing out of the water outlet pipe directly flows into the water storage container, the diameter of the porous sieve plate is slightly smaller than the inner diameter of the water storage container, the porous sieve plate is fixed to the inner wall of the water storage container, and the fixing height is adjustable; the floating ball is arranged in the water storage container and is positioned below the porous sieve plate; the water return pipe is communicated with the water storage container; the water stop valve is arranged on the water return pipe; and the device has the characteristics of simple structure, reusability, low cost and low energy consumption. The flow measurement method converts the water flow velocity into the rising velocity of the floating ball in the water storage device, so that the flow velocity measurement mode is more visual and accurate, the experiment efficiency is improved, the experiment time is saved, and the method is widely applied to various fluid mechanics experiments.

The invention discloses a PDMS photoetching micro-nano bubble preparation method. The preparation method comprises the following steps: step A, erecting a nano bubble generating device; step B, designing a micro-channel and manufacturing a template; designing nine micro-channels with different channel widths and different included angles at two inlets of the channels; step C, manufacturing a PDMS template; pouring the mixed solution into a silicon wafer template, and putting the prepared PDMS template into a drying box overnight; step D, preparing micro-nano bubbles; pressing down the start button, and enabling gas and liquid to enter the channel at the same time. The invention also discloses a PDMS photoetching micro-nano bubble test method. The method comprises the following steps: step A, debugging bubbles meeting the standard; step B, measuring the size of the micro-nano bubbles; step C, measuring the rising speed of the micro-nano bubbles in the water; step D, verifying the sewage treatment effect of the micro-nano bubbles. The PDMS photoetching micro-nano bubble preparation method and the micro-nano bubble test method have great application prospects.