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 relates to a spraying efficient electrostatic precipitator, comprising a shell with a bottom smoke inlet; upper and lower ends of the shell are provided respectively with a smoke outlet and a dirt outlet; two sides of the shell are provided respectively with a high-tension power supply and an insulating box; an anode tube and a cathode filament are arranged inside the shell; the anode tube and the cathode filament are connected respectively with the high-tension power supply; the upper portion of an upper support is provided with a spray pipe; the smoke inlet is provided with a dividing tank, and an atomizing pipe is arranged below the smoke inlet; a deceleration plate is arranged above the dividing tank, and an adsorbent layer is provided between the deceleration plate and a lower support.The atomizing pipe cools waste gas by atomizing when the waste gas enters and can also increase self-weight of flue gas, ascending speed is decreased, and reacting time is prolonged; the dividing tank and the deceleration plate can divide and decelerate the flue gas; the adsorbent layer can primarily purify the flue gas first; the anode tube and the cathode filament can charge dust by high-tension corona discharge, and the charged dust is descended and collected under the action of force of an electric field.

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 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.

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 relates to a hydrotreating combined process for inferior heavy oil and residual oil. The hydrotreating combined process comprises the following steps of: firstly pretreating the heavy oil and / or residual oil raw material in a slurry reactor; carrying out gas-liquid separation, and hydro-upgrading the liquid-phase product in a fixed bed, wherein the hydro-pretreating part of the slurry reactor comprises a straight cylinder type slurry reactor pretreatment reactor and a slurry reactor hydro-catalyst, and the reactors used in the fixed bed hydro-upgrading part sequentially and mainly include two parallel up-flow type deferrization-decalcification reactors, one up-flow type demetalization reactor, one fixed bed desulfurization reactor and one fixed bed denitrification reactor. By adopting the hydrotreating combined process provided by the invention, not only are the hydrotreating and impurity removal capacities of the catalyst improved, but also the running cycle of the device is prolonged. The hydrotreating combined process provided by the invention can be applied to treating the inferior heavy oil and residual oil, which are high in sulfur content, metal content, and asphalt content; the conversion ratio is 30-80%; the raising rate of the pressure drop of the reactors can be effectively reduced so as to achieve the long-period running of the device.

The invention discloses a method for regulating bubble splitting by superhydrophobic tracks in a plane. The super-hydrophobic track in the present invention is composed of equal-width segment track and diffusion segment track. When the bubble slides from the equal-width track to the diffusion track, the part of the bubble that enters the diffusion track undergoes short-term accelerated spreading under the attraction of the diffuse superhydrophobic wall and accelerates forward. At this time, it is in the constant-width track The bubble part of the bubble keeps the original small rising speed. The strong speed difference between the two directly leads to the tearing of the bubble. Under the action of the interfacial tension, the bubble begins to split into many small bubbles following the principle of the minimum surface free energy. , so far the preparation of tiny bubbles is completed. The invention is simple to prepare, low in cost, can quickly obtain (1‑2) mm small bubbles on the open wall surface, and can adjust the splitting by changing the width of the track and changing the angle between the diffusion section and the equal width section according to the needs of different scenarios bubble size.

The invention provides a device and method for generating micro-nano bubbles and its application in dye wastewater treatment. The device for generating micro-nano bubbles in the invention includes a pressure dissolved gas tank, a gas-liquid mixing pump, a jet and a water tank. The device of the invention can generate a large number of micro-nano bubbles with a slow rising speed and a diameter mostly between 100nm and 300nm by adjusting the suction volume of the gas-liquid mixing pump and the ejector. Aiming at the problems of deep chroma, high COD, and difficult degradation of dye wastewater, the high-efficiency oxygenation and hydroxyl radical production characteristics of micro-nano bubbles can degrade organic matter in water non-selectively, and the foam generated during the degradation process can be adjusted by fine-tuning the temperature , salt concentration, defoamer concentration, etc. The device and method for generating micro-nano bubbles provided by the invention have extremely high application value in the treatment of dye wastewater.

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 relates to a solar energy heat-supply type main stream domestic sewage anaerobic ammonium oxidation greenhouse reaction tank, which comprises a reactor body, wherein the reactor body sequentially comprises a reflux water distribution unit, a mud discharge unit, an autotrophy denitrogenation unit, a three-phase separation unit and a water outlet gas discharge unit from bottom to top, the reflux water distribution unit is provided with a water inlet pipe, a nitrogen reflux pipe and an effluent reflux pipe, the mud discharge port of the mud discharge unit is arranged on the side surface of the bottom end of the reactor body, the three-phase separation region is provided with an upper gas collection cover, a lower gas collection cover, a diversion pipe and a water collection pool, the water outlet unit comprises a water outlet groove and a water discharge port, the outer portion of the reactor body is provided with a greenhouse cover, the upper portion of the greenhouse cover is provided with an exhaust fan, an external temperature probe is arranged between the greenhouse cover and the upper cabinet, and an internal temperature probe is arranged in the upper cabinet. The solar energy heat-supply type main stream domestic sewage anaerobic ammonium oxidation greenhouse reaction tank has the following beneficial effects that: with the greenhouse cover, the adverse impact of the seasonal and nycterohemeral temperature difference on the denitrogenation performance of the anaerobic ammonium oxidation reactor can be released; and the water outlet and nitrogen reflux system has effects of strong impact load resistance, sufficient upflow velocity and shear force providing, and sludge granulation promoting.

The invention provides a method for suppressing longitudinal protrusion of an SAGD steam chamber. The method comprises the steps that normal temperature water is injected into a well point of the longitudinally protrusion of the steam chamber of an SAGD mining reservoir to reduce the temperature of a protruding cavity at the top of the steam chamber, and the water is stopped from being injected when the temperature drops to 150-180 DEG C; nitrogen gas is injected, a heat insulation strip is formed at the top of the steam chamber and at the bottom of the protruding cavity, heat transfer from the steam chamber to the top protruding cavity is controlled, the temperature in the protruding cavity is reduced, and the rising speed of the steam chamber at the well point is suppressed; repeated injection of the normal temperature water and nitrogen gas is performed for a plurality of times, and the longitudinal protrusion of the SAGD steam chamber is suppressed. The method for suppressing the longitudinal protrusion of the SAGD steam chamber adopts the method of alternately injecting the water and the nitrogen gas, the protrusion of the steam chamber can be suppressed and the stable expansion of the steam chamber can be ensured, and the production effect of the SAGD can be effectively improved.

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 tailings dry mining method based on groundwater drainage for a valley-type tailings pond, which specifically includes: investigation of tailings ponds and geological surveys, division of mining areas and determination of parameters, laying of transport roads, and adoption of reverse mining methods. The excavation method and the setting of open drainage ditches complete the recovery of the entire tailings pond; the invention excavates the open drainage ditches for drainage, uses wetland excavators to dig ditches, and the drainage platform is two layers ahead of the mining platform, and the safety and timeliness of drainage can be reduced. It is guaranteed that the engineering quantity can be directly used as the recovery quantity, the drainage and recovery work are closely connected, the input facilities and equipment are simple, and the road in the reservoir is directly laid with tailings, which is time-saving and convenient, and avoids the entry of different materials and secondary transportation; this speeds up The mining speed of the tailings pond is shortened, and the mining period is shortened, which solves the problem of the short effective working time of the traditional dry mining. Accelerated the rising speed of the foundation bearing capacity of the tailings pond, so that the tailings recovery work of the tailings pond can be completed quickly, efficiently and on a large scale.

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 method for measuring air bubble filtration characteristics of a separation wire mesh. The present invention conducts the test in a circulating water tank. The circulating water tank system provides a uniform horizontal flow for the test section of the water tank to drive the movement of the bubbles in the horizontal direction through the rectification of the contraction section, and the rotating water tank flow regulating valve controls the liquid in the water tank. Flow speed, so that the bubbles rise under the action of buoyancy and have a controllable horizontal movement speed to impact the separation screen. The plane of the separation screen is perpendicular to the main flow direction and can move; The bubble generation system upstream of the net is generated; high-speed cameras and uniform light sources are installed on both sides of the water tank test section, and the boundary and movement trajectory of the bubbles are captured at high speed by using the shadow method, and then the bubble scale, impact velocity, rising velocity, and separation wire are obtained. Volume fraction of air bubbles before and after the mesh. The measurement mode of the method of the invention is simple and effective, and can be adapted to the measurement of different separated wire mesh objects.

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.

A dry reaction accelerator comprises a reaction unit, wherein the reaction unit comprises a cyclone chamber, an acceleration diffuser and a reaction chamber. The cyclone chamber rotates the flue gas containing the particulate matter introduced into the inlet portion to remove the particulate matter. The accelerating diffuser is connected to an upper portion of the cyclone chamber to introduce a reactant, accelerating the rotational flow and the ascending velocity of the exhaust gas, thereby dispersing and diffusing the reactant and the exhaust gas. The reaction chamber is connected to the upper portion of the acceleration diffuser, and the reactant and the exhaust gas are circulated in the reaction chamber and upwardly rotated and react with each other, and are discharged to the outlet portion. A baffle is disposed in the upper side of the reaction chamber to induce recirculation of the reactant and the exhaust gas, thereby reducing the pressure of the reaction chamber.

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.

The invention provides rapid decarbonization and coagulation integrated clarifying equipment, which comprises a mixed reaction chamber, an internal reflux circulating reaction chamber, an external reflux circulating reaction chamber and a settling zone which are sequentially sheathed together. A reflux port which is communicated with the internal reflux circulating reaction chamber is arranged on the internal wall of the mixed reaction chamber. A closed small-resistance water distribution ring is arranged at the top of the internal reflux circulating reaction chamber. A water outlet hole which is communicated with the internal reflux circulating reaction chamber is arranged in a ring plate at the bottom of the water distribution ring. An internal reflux circulating turbulent flow mixing device is arranged in the internal reflux circulating reaction chamber. An external reflux circulating turbulent flow mixing device is arranged in the external reflux circulating reaction chamber. Since internal and external multistage reflux circulating reaction chambers are arranged, the rapid decarbonization and coagulation integrated clarifying equipment provided by the invention has the advantages that the multistage solid-liquid separation of sludge is realized, the reaction process flow is lengthened, the reflux ratio is increased, the upflow velocity of a separation zone is obviously improved, the output of the equipment is large, the occupied area is small, the investment cost is low and the safe and reliable operation of the equipment is guaranteed at the same time.

The invention relates to a high-efficiency air flotation device for sewage treatment, which includes an air flotation tank, an air flotation machine, an air inlet pipe, a water inlet pipe, a water outlet pipe, a controller, a top plate, a lifting mechanism, a first motor, a rotating shaft, and two filtering mechanisms and a number of deceleration mechanisms, the filter mechanism includes a filter screen, a flat plate and a shrinking assembly, the shrinking assembly includes a second motor and two shrinking units, the shrinking unit includes a bearing, a transmission shaft, a reel and a pull wire, the deceleration mechanism includes several deceleration assemblies, the deceleration assembly Including horizontal plates and several deceleration units, the high-efficiency air flotation device for sewage treatment reduces the rising speed of bubbles in water through the deceleration mechanism, so that the bubbles have enough time to contact and drive the solid particles in the sewage to float up, so as to achieve efficient purification Treatment, not only that, the filter mechanism makes the scum stay on the surface of the filter screen during drainage, which is convenient for people to clean up the scum and achieve the purpose of solid-liquid separation, thereby improving the practicability of the equipment.

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 field of sewage treatment equipment, in particular to a rectification air flotation machine, and aims to solve the problems that in the prior art, a sewage treatment system is large in water flow disturbance and slow in floating process, and formation of effluent quality is easily affected. The rectification air flotation machine is technically characterized by comprising a separation area. The separation area comprises a flow guide assembly and alaminar flow assembly. The flow guide assembly is located above the laminar flow assembly and used for converting a horizontal movement water body into a vertical movement water body, and the laminar flow assembly is used for changing turbulent water flow into a laminar flow state. Through the flow guide assembly, water is converted from horizontal motion into vertical motion, and through the arrangement of the rectification assembly, water flow is changed into a laminar flow state from a turbulent flow state, so that suspended solids in sewage are in a very quiet state in any space of the air floatation separation area under the guidance of bubbles; therefore, the ascending speed of suspended matters can be greatly increased. And the suspended matter removing efficiency of air floatation is improved.