136 results about "Dead water" patented technology

The invention relates to a method for constructing a deep pool and a shoal in a straight river channel. In the method, a spur dike is arranged on the left bank side of the straight river channel, a bank slope on the opposite bank of the spur dike is protected by riprap, a diving guide wall is arranged on the left and right banks of the downstream side of the spur dike respectively, the discharge cross section of the river channel is shortened by the spur dike to increase the flow rate of water flow, the bottom of a river bed of a river reach between the diving guide walls on the downstream side of the spur dike is continuously scoured to naturally form the deep pool, and a dead water area or slow flow water area formed between the diving guide wall and the river bank becomes the shoal through long-term deposition. The method has the advantages that: the deep pool is naturally formed and becomes a rest place for aquatic organisms such as fishes and the like, and can become a shelter for the aquatic organisms such as the fishes and the like in a flood period; plants can be planted on the shoal, and the shoal can become an organism habitat different from the deep pool; and the complexity of a river channel structure and water conservation condition diversity can be increased or repaired, and river biodiversity, population composition and rare species conservation are facilitated.

A packaged residential fire pump system for sprinkler protection of one- and two-family dwellings. The system independently provides sufficient water pressure, and volume, for a two sprinkler flow for a period of time. An existing domestic water supply is supplemented with a dead water storage tank. The system can be combined with hydraulically sized, or scheduled, system piping and sprinkler heads.

A centrifugal fan has a circular main plate driven and rotated by a motor rotary shaft, a plurality of blades fixed to an outer circumferential portion of the main plate and spaced apart at predetermined intervals in a circumferential direction of the main plate, and a side plate attached to ends of the blades opposite to the main plate. An air inlet port is formed at the center of the side plate. The side plate inclines outward in centrifugal directions from the air inlet port and has an arcuate cross section with a predetermined radius of curvature. A dead water region reducing space is formed between the blades and the side plate. The dead water region reducing space forms a smooth flow between the two surfaces of each blade, bringing about desirable blade performance.

The invention discloses an extraction method for a reservoir characteristic curve based on a spatial information technology. The method comprehensively applies RS, GIS and GPS techniques and a digital elevation model. The method comprises the following steps: extracting a characteristic curve in a dead water level-normal pool level elevation scope based on remote-sensing image water information extraction and a GIS drawing technique, and extracting a characteristic curve in a normal pool level-maximum flood level elevation scope based on a GPS topographic surveying technique and a multi-source spatial data topography modeling technique. Compared with the present reservoir characteristic curve acquiring technique, the method disclosed by the invention has the advantages that a level-area and level-volume curve above the dead water level of the reservoir can be quickly, efficiently and accurately acquired, and the cost is low. Specific to the running reservoir, the method can conveniently check the original reservoir characteristic curve and has significance in reservoir flood preventing and power generation dispatching.

The invention relates to an ecological dispatching method for a reservoir based on an ecological dispatching graph, which comprises the following steps of: firstly, adding ecological water requirements into a water supply plan of the reservoir as a water supply department, calculating the utilizable capacity and the key dispatching line of the reservoir by using the diachronous method and the actual typical year method respectively, and further drawing the ecological dispatching graph of the reservoir; and then, formulating dispatching modes when the water level of the reservoir is in different areas including an area above the dead water level and below the limiting flood level, an area above the limiting flood level and below a lower dispatching line, an area above the lower dispatching line and below an upper dispatching line, an area above the upper dispatching line and below flood-fighting line, and the like, according to the ecological dispatching graph of the reservoir. The ecological water requirements are added into the traditional ecological dispatching graph, and the ecological dispatching graph is used for instructing the dispatching modes, therefore, the ecological dispatching of the reservoir is more practical and can be applied more easily.

The invention discloses a turn-back flow high-efficiency rectangular double-layer settling pond. In the settling pond, the body of the pond is divided into an upper layer and a lower layer by a partition board which is arranged horizontally, wherein a high-efficiency lateral flow inclined plate is arranged in a lower layer settling area so as to strengthen the suspended matter trapping efficiency according to a shallow pond principle; sewage mixed solution enters an upper layer settling area from a water hole in one end of the partition board for further solid-liquid separation by tranquilflow settling, and the effluent is collected in and flows out from a water collection tank arranged at a water outlet end; and the settled sludge is scraped and absorbed by a chain-plate type mud scraper or mud scraper and absorber which can adapt to the unique structure of the settling pond, and at the same time, scum is scraped into a scum collection device. Compared with the prior part, the settling pond has the advantages of avoiding the phenomena such as short flow, obvious dead water area and sludge floating in a common settling pond, along with high settling efficiency, smaller floor area and lower operation cost.

The invention discloses a method for real-time optimal dispatching and benefit evaluation of a cascade reservoir group. The method comprises the following steps of: when a flood is forecasted, increasing the output power generation of each reservoir in advance, carrying out full-load operation on the upstream reservoirs to reduce the water levels of the reservoir to a dead water level threshold value and then empty the reservoir capacity; when the flood happens, closing the upstream reservoirs so as to back up the flood for the downstream reservoirs under the premise that the downstream reservoirs are fully loaded, and compensating the additionally generated power of the downstream reservoirs to the upstream reservoirs; if the water levels of upstream reservoir power stations rise to exceed a normal high water level and heavy rainfall is forecasted in N days, opening the upstream reservoirs to carry out flood discharge, and compensating the additionally generated power of the downstream water reservoirs to the upstream reservoirs; after the water levels fall, opening the upstream reservoir power stations to ensure that the downstream reservoir power stations are fully loaded; and evaluating the annual performance of the cascade reservoir group via the power of abandoned water of the upstream reservoirs and the additionally generated power of the downstream reservoirs. According to the method disclosed by the invention, measures such as pre-discharge and reservoir emptying, peak staggering and peak clipping, and flood tail interception and storage are adopted, so that less abandoned water of the cascade reservoirs is realized and the power generation benefit of the cascade reservoirs is improved.

After a water quality control of a water tank is connected with the slightly-improved water tank, the water tank is changed into an expanded pipeline, and therefore secondary pollution is effectively avoided. Power of ball valves in the controller depends on energy provided by water inlet and water consumption of a pipe network. A filter, a chlorine control ball valve, a water overflow ball valve, a water inlet pipe, a water outlet pipe, a breathing pipe and a deep hole dirt storage tank are arranged in a tank body. The water quality controller and the water tank are connected into a whole through a communicating pipe. A manhole of the water tank is sealed, a safety valve is installed on an overflow pipe, and therefore expansion and shrinking of the tank are avoided. Through the chlorine control valve, an air chamber in the tank can be kept at micro-positive pressure, and therefore free chlorine does not easily escape out of the tank and can fully play the disinfection role. When water inlet is larger than water outlet, air, containing free chlorine, in the tank is exhausted outwards to back flush a disinfection filter element, and therefore efficiency of the filter is improved, and the service life of the filter is prolonged. A water flow slow flow zone and the deep hole dirt storage tank are arranged on the controller, and a dead water zone is moved forwards to the controller. The goal of avoiding secondary pollution of tap water is achieved without consuming electricity, adding disinfector or conducting filtering.

A fluid filled vibration damping device having an orifice passage formed in a partition member to connect a pressure receiving chamber and an equilibrium chamber, wherein a first end section of the orifice passage extends in along a plane of the partition member, and a communication hole is formed to bend at a right angle from the first end of the orifice passage and open towards the pressure receiving chamber to form a dead water region by orthogonal wall faces of a terminal end face and a bottom face of the orifice passage in a connecting corner section of the orifice passage with the communication hole. A shunt hole of smaller cross-sectional area than the orifice passage and the communication hole is formed in a bottom wall so that the pressure receiving chamber and the equilibrium chamber communicate through the shunt hole in the dead water region.

The invention relates to dead water, sewage and waste water processing equipment or a chemical industry equipment, in particular to a jet loop reactor which leads the collision and mixing between processing water and gases such as oxygen or ozone, etc., by jetting gas-liquid from a composite nozzle in a processing cylinder and simultaneously forming the annular flow in an inducing pipe; the inducing pipe is provided inside with a conical diffuser and a convex part, for increasing contact area between the gases and the liquid and residence time in the processing cylinder, thereby improving the gas-liquid mixing performance. The invention improves the gas-liquid mixing performance of the jet loop reactor and further achieves the effect of improving the gas-liquid mixing.

The invention provides an environment-friendly lawn structure for sponge urban greening decoration. The environment-friendly lawn structure comprises a lawn planting shell, stirring rod structures anda second annular protruding ring structure. A body of the lawn planting shell is in a rectangular block shape. The top sides of the left end face and the right end face of the lawn planting shell areeach provided with a rectangular protruding block structure. The left side and the right side of the bottom end of the inner end of a lawn planting groove structure are each longitudinally provided with a plurality of round through hole structures in rectangular arrays. The round through hole structures are communicated with a water storage cavity structure. The bottom end of a rotating shaft islocated in the water storage cavity structure, two flowing water mechanisms are arranged at the bottom end of the rotating shaft, each flowing water mechanism is composed of the two corresponding stirring rod structures in annular arrays, and therefore when wind blows in ordinary times, the wind can blow a canvas to move so as to drive the rotating shaft to rotate around an axial hole structure, the flowing water mechanisms at the bottom end of the rotating shaft stir natural water resources stored in the water storage cavity structure to move, and the dead water phenomenon is avoided.

The invention relates to a steel ingot water-cooling crystallization process without a feed head. The steel ingot water-cooling crystallization process comprises the following steps of guiding condensate water into a cooling water cavity through a water inlet pipe in advance after half casting molds of a water-cooling mold are fixed through bolts; pouring molten steel into the casting molds of the water-cooling mold; carrying out mold stripping after 10-40 minutes of heat preservation; covering a steel ingot with a heat preservation cover after mold stripping, removing the heat preservation cover after 13-20 hours of heat preservation, placing the steel ingot into a heat preservation sleeve which is not covered with a heat preservation cover for 3-15 hours of ventilation, and then covering the steel ingot with the heat preservation cover for 15-40 hours of heat preservation; after condensation of all the steel ingots is completed, transferring the steel ingots into a pit for 10-40 hours of heat preservation. The steel ingot water-cooling crystallization process has the advantages that by adopting a cooling water circulation mode, dead water zones do not exist when the steel ingots are cooled, the cooling speed is uniform, the water-cooling mold does not deform, the service life is long, each ingot mold can be used about 500 times, the contraction effect of the upper portion is good, the cast steel ingot is compact in structure, free of air holes and the like, and the yield of steel is high. According to the scheme, the cooling speed is uniform, a chilled layer is thick after the steel ingot is cast, the cooling speed of the steel ingot is high, and the compactness of the steel ingot is good.

The invention discloses a method for staggered optimal dispatching of a cascade reservoir group. The method comprises the following steps of: 1, when the reservoir inflow of incoming water is smaller than the fully-loaded flow of upstream and downstream reservoirs in a cascade reservoir group, carrying out power generation on each reservoir according to the inflow, and if redundant water yield is predicted, increasing the output of each reservoir in advance until the reservoir is fully loaded; 2, when flood is forecasted, increasing the output power generation of each reservoir in advance, carrying out full-load operation on the upstream reservoirs to reduce the water levels of the reservoirs to a dead water level threshold value and then empty the reservoir capacity, and when flood happens, closing the upstream reservoirs so as to back up the flood for the downstream reservoirs under the premise that the downstream reservoirs are fully loaded; 3, if the water levels of the upstream reservoir power stations rises to exceed a normal high water level and heavy rainfall is forecasted in N days, operating the upstream reservoirs for flood discharge; and 4, after the water levels fall, opening the upstream reservoirs to ensure that the downstream reservoirs are fully-loaded. According to the method disclosed by the invention, cascade hydropower station centralized dispatching management is adopted, so that optimal dispatching is realized and the electric quantity is increased.

The invention discloses a sea water desalting plant with a fixed bar mirror combination for linear solar condensation, and a desalting method thereof. According to the device, mixed bar reflection mirrors are applied to condensation and heat collection to generate liquid or steam at middle and high temperatures, a piston in a gas-liquid combined cylinder is used for directly driving and boosting the liquid or the steam which then enters into a reverse osmosis desalination device, exhaust steam is applied to sea water desalination again by a distillation method, and condensate water is circulated to a solar condensation collector to form semi-closed circulation. According to the sea water desalting plant, as the reflector is fixed, and an absorber is tracked, so that a tracking system is simplified, the energy consumption is reduced, and the system utilization efficiency is improved; and furthermore, sea water desalination by reverse osmosis is driven by high pressure obtained from acting with direct expansion, the exhaust steam is recycled, and energy levels are utilized in echelon and coupling manners, so that the efficiency of available energy is improved. The sea water desalting plant can be used for automatically adjusting pressure and steam temperature required by brackish water and sea water with different concentrations, and has great superiorities when being applied to desalination of the brackish water and the sea water in regions with high wind power along the coast and in a desert land.

The invention provides a water jacket of an engine cylinder, comprising a ring-shaped cylinder water jacket and a water pump that are enclosed by an air inlet side water jacket and an air outlet side water jacket and arranged between the cylinder and a cylinder sleeve; the water outlet of the water pump cuts in the water inlet of the air outlet side water jacket; the air outlet side water jacket is provided with a group of air outlet side cylinder cover water holes; the air inlet side water jacket is provided with a group of air inlet side cylinder cover water holes; and a nose bridge area is also provided with a nose bridge area cylinder cover water hole. The water jacket is characterized in that the air inlet side water jacket corresponding to the other side of air inlet of the air outlet water jacket is provided with a water returning hole and is communicated with the water inlet of the water pump by the water returning hole; as the water outlet of the water pump directly cuts in the water jacket and a water outlet hole on the external wall of the cylinder at the external side of the water jacket of the dead water area is directly communicated with the water inlet of the water pump, the dead water area can be eliminated and the cooling effect can be greatly improved.

The invention relates to the field of sewage treatment and discloses underground type micro power purifying tank sewage treatment equipment and a treatment method. The purifying tank sewage treatment equipment comprises an oil isolating pool, a facultative pool, an aerobic pool and a settling pool which are arranged in sequence and communicated in sequence through corresponding openings and water passing devices. Specially-made microorganism carrier filler, aerator pipes and sewage backflow and air lift pipelines are arranged in the facultative pool and the aerobic pool. A mixed liquor backflow and air lift pipeline and an overflow weir are arranged in the settling pool. While oil and water separation is achieved, floating oil is controlled within a certain water surface region, and therefore convenience is brought to follow-up clearing and sludge sucking; the dead water region of the facultative pool is reduced, the contact area between sewage and facultative microorganisms is increased, and time for contact between the sewage and the facultative microorganisms is shortened; membrane formation and growth situations of the microorganisms can be observed conveniently; oxygen transfer efficiency is improved, and meanwhile air holes can be prevented from being blocked; the sludge in the settling pool can flow back to the oil isolating pool well.

The invention relates to a method for reducing abrasion between a punch and a die sprue bush, which comprises the following steps of: setting a cooling water channel of the die sprue bush into a spiral water channel, and simultaneously increasing the width and depth of the cooling water channel; and maintaining the distance between a water inlet copper pipe of an injection rod and the bottom of an inner bore of the punch to be L so as to remove a stagnant water phenomenon. Compared with the prior art, the method has the advantages that: the service life of the conventional die sprue bush is only ten thousand times, and the present service life is more than eighty thousand times; and the service life of the punch is improved to 30,000 from 1,500 times, so the economical benefit of the enterprises is greatly improved.

The invention discloses a pumped-storage hydroelectric plant applied to an ecological reservoir and a sewage treatment method. The pumped-storage hydroelectric plant comprises a slope, a lower reservoir and an upper reservoir; a water pumping pipe and a sluiceway are arranged between the upper reservoir and the lower reservoir, respectively; a combined water suction pump is arranged on the water pumping pipe; a turbine generator is arranged on the sluiceway; an aerator is arranged at the bottom end of the upper reservoir; a concrete retaining wall is arranged to surround the upper reservoir; a wind driven generator is arranged at the upper end of the concrete retaining wall; a solar panel is arranged at the upper end of the concrete retaining wall. The sewage treatment method comprises the steps of (a) construction preparation, (b) surveying and setting out, (c) foundation pit excavation, (d) water pumping pipe construction, (e) sluiceway construction, (f) slope foundation pouring, (g) slope preparation construction, (h) vegetation planting, (i) lower reservoir excavation, (j) upper reservoir excavation, (k) water diversion, water pumping (l) and (m) sluicing. The pumped-storage hydroelectric plant is capable of producing the electric energy by virtue of energy conversion, and also capable of changing dead water into running water and improving the water quality.

The invention discloses a two-purpose faucet for washing and drinking, which comprises a housing (7), a filter and a selector switch (6), wherein the filter is arranged in an inner cavity of the housing (7) and used for separating the inner cavity of the housing (7) into a tap water cavity (71) and a purified water filtering part. The two-purpose faucet for washing and drinking is characterized in that the selector switch (6) has a structure of opening a water outlet cavity (73) and closing a water outlet pipe (72) as well as closing the water outlet cavity (73) and opening the water outlet pipe (72) and is arranged on the housing (7), and a water inlet (76) of the housing (7) is directly communicated with the tap water cavity (71). The invention has the advantages that washing water and drinking water channels are mutually independent without polluting mutually, thus filtered drinking water is ensured to be clean and sanitary; because the filter is provided with a plurality of filter layers provided with sub filter structures, impurities in tap water can be more completely blocked, cleanness of filtered water is ensured; moreover, the water inlet outer surface of the filter is in contact with the inletted water of the tap water cavity, no dead water exists, and the filtered water is always kept fresh.

The invention discloses a reservoir water rain condition automatic forecasting system which comprises a stand rod, detecting equipment, collecting equipment and a monitoring center. The detecting equipment comprises a water level gauge, a rain gauge and a camera. The water level gauge comprises a water level gauge probe and a water level gauge body. The water level gauge probe is arranged in a stainless steel net box. The water level gauge body is arranged in the collecting equipment. The water level gauge probe and the water level gauge body are connected through a waterproof cable. The stainless steel net box is arranged below a dead water level. Water level data obtained by measuring of the water level gauge probe are sent to the water level gauge body through the waterproof cable. The collecting equipment is placed in the middle of the stand rod and is used for collecting water level data, rainfall data and picture information detected by the detecting equipment, and the water level data, the rainfall data and the picture information are transmitted to a monitoring center in a telecommunication mode. Construction is easy, cost is low, maintaining is convenient, and measured data of the water level gauge are high in reliability.

The invention discloses a spiral aeration method and a spiral aeration tank. According to the method, a plurality of jet aeration devices are used for aeration together, jet exits of the jet aeration devices are distributed along a certain circumference; each jet exit direction and the radial direction form an included angle; sewage in the aeration tank forms a rotational flow, and the integral flow field spirally rises; and the sewage is aerated and flows out through a water outlet of the aeration tank. The aeration method increases the sewage flow paths in the aeration process, increases the gas / liquid-phase contact area, and increases the total transfer coefficient of aeration tank oxygen. By using the aeration method, the partial dead water region is reduced due to the more uniform flow distribution, thereby increasing the effective aeration region, enhancing the aeration efficiency, enhancing the volume utilization ratio of the aeration tank, and saving the occupied space. The spiral-rise jet aeration method can enhance the oxygen utilization ratio, so that the spiral aeration tank has the advantages of strong aeration effect, simple structure, high reaction efficiency, small occupied area and low cost.

The invention discloses a novel totally-closed negative-pressure-preventing secondary water supplying system with a suppressor. The secondary water supplying system comprises water pumps, a flow stabilizing tank, a pressure meter, the suppressor, an air pressure tank, electromagnetic valves, a matched grid system and a matched water transportation pipe network system, and is characterized in that the water pumps are provided with induction air stopping switching valves, the flow stabilizing tank is provided with an induction type liquid level floating ball and a three-way air exhausting meter valve, the three-way air exhausting meter valve is directly connected with the pressure meter, the pressure meter is provided with a numerical display screen and an alarm device, the suppressor is provided with a pressure transmitter and a liquid level switch, the air pressure tank is provided with a power-connection type digital display pressure meter, and the matched grid system is provided with the three electromagnetic valves. The secondary water supplying system has the characteristics of total closing, negative pressure preventing, induction alarming, automatic air discharging, automatic water-supplementing pressure stabilizing, automatic water changing and dead water preventing; the scheme is suitable for mass use of the secondary water supplying system for production and domestic municipal water supplying to people.

The invention provides a bag-type air-pressure tank used for domestic drinking water pressurization equipment, and relates to the technical field of water supplying equipment. The bag-type air-pressure tank comprises a tank body, an elastic air bag is arranged inside the tank body, the interior of the tank body is divided into an air chamber and a water chamber through the elastic air bag, and an air adding opening and a water inflow and outflow opening are formed in the tank body, wherein the air adding opening is communicated with the air chamber, and the water inflow and outflow opening is communicated with the water chamber. A water inflow and outflow structure is arranged at the water inflow and outflow opening and comprises a water inlet pipe, a water outlet pipe and a seal shell, wherein the interior of the seal shell is communicated with the water chamber, the water outlet pipe is communicated with the interior of the seal shell, the water inlet pipe penetrates through the seal shell and extends into the water chamber, and the water outlet end of the water inlet pipe is away from the water inflow and outflow opening. The bag-type air-pressure tank used for the domestic drinking water pressurization equipment is connected with a water supply pipe in series, water inside the water supply pipe has to pass through the water chamber, water inside the water chamber can be effectively replaced whether the water pressure inside the water supply pipe fluctuates or not, dead water will not be formed inside the water chamber, microorganisms will not be generated inside the water chamber, and secondary pollution will not be generated.

The invention discloses a method for increasing regulation storage and generating compensation benefits of a high-dam leading reservoir. According to the method, a water turbine and difference of dynamic water generating of a water diversion system and a safe waterhead of still water retaining are adopted, a new limit dead water level is set below an existing dead water level of the reservoir, the regulation storage and the available water supply in the dry season can be increased, and the generating benefits of all downstream hydropower stations are increased accordingly; a hydraulic turbine set and a corresponding water diversion generating system which are suitable for operation of the limit dead water level and the original dead water level are additionally arranged, and the generating benefits of the hydropower stations are increased; the newly increased available water supply in the dry season enables other weepage water channels of the hydropower stations to discharge; after the limit dead water level is additionally set, the function of emptying the upper layer water storage is achieved as well. According to the method, the direct water supply generating benefits are remarkable, national energy security is facilitated, and the grid electric energy quality is promoted beneficially; meanwhile, the method has the advantages that the proportion of utilizing the clean energy and renewable energy sources is increased, the utilization efficiency of water resources is improved, and environment protection is promoted.

The invention belongs to the technical field of environmental monitoring, and particularly relates to a method for evaluating a flow pattern of constructed wetlands by using hydrogen or oxygen isotopic abundance. The method includes that contour line of the isotopic abundance of an area to be evaluated is drawn according to sampling point data obtained through measurement, and 2H (hydrogen) and 18O(oxygen) abundances are higher based on isotopic contour line. And an area forming obvious edges with other areas of the wetlands is a slow flow area or a dead water area, 2H and 18O abundances are relatively lower, and an area with little variation is a water flow passage of the wetlands. By the aid of the method, specific positions of the water flow passage and a stagnant area in the wetlands can be accurately marked, slow flow level is determined, limitation of a tracer agent adding research method and model simulation is overcome, the method is simple in sample preprocessing analysis, real and reliable in data results, and high in practicability.

The invention relates to the technical field of water body pollution abatement, in particular to a water body pollution abatement system and method. According to the method, a diversion wall and a plug-flow aeration machine are arranged in a water body, which have the effect of pushing water and aeration and prevent a dead water zone from being formed during water body circulation. A biological film net and an ecological floating island are arranged in the water body, certain dissolved oxygen gradient is formed at the bottom and the peripheral region of the ecological floating island under the photosynthesis of aquatic plants on the ecological floating island, and the dissolved oxygen gradient is beneficial to removing pollutants in the water body, such as N, P and the like, through the combined effect of aerobic bacteria, anoxic bacteria and anaerobic bacteria, so that the water quality is purified. Meanwhile, the plug-flow aeration machine is arranged in the water body, sufficient oxygen dissolved in the water body is guaranteed. The water body is firstly filtered through a filter chamber, a large proportion of organic matters and inorganic matters, such as suspended solids, algae and the like, in water can be removed, the filtered water flows into the water body again and forms water body circulation with the diversion wall arranged in the water body.

The invention relates to a submerged material cleaning and separating device and method. The device comprises a breaking and primary cleaning mechanism, a rubbing type washing mechanism and a dehydrating mechanism. According to the invention, three processes of breaking, cleaning and separating are combined together; through six processes of spraying and primary cleaning, cyclone separation, rubbing and cleaning, primary dehydration, high-speed dehydration and final separation, complete separation of the submerged material from water, silt and light impurities is realized, and the cleaning and separating effect is excellent; the impurity content in the submerged material cleaned and separated according to the invention approaches to zero. According to the invention, through supernate extraction, cyclone backflow and dehydration backflow, 'dead water' in a pool is changed into 'live water' circulating in three directions, recycling of the cleaning water can be realized without sewage recycling equipment, and thus the water consumption is remarkably reduced.

The invention relates to a circular hydraulic engineering device for a landscape water body. The device comprises a main baffle plate, an upstream water pump part, an upstream algae removal device, anupstream sludge removal device, an upstream sewage treatment device, a downstream water pump part, a downstream algae removal device, a downstream sludge removal device and a downstream sludge treatment device. By arranging the parts, the landscape water body can be converted from dead water into living water, so that the condition of inner pollution of the landscape water body which is left to stand for a long time is avoided.

A cooled turbine rotor blade for a gas turbine which is traversed axially by flow and is equipped with an attachment area and an airfoil profile is provided. Meandering cooling channels with interposed deflecting regions are provided in the interior of the airfoil profile. In the deflecting regions, it is possible to prevent dead water regions, which are generated in the prior art, by virtue of at least one of the ribs running so as to curve towards the leading edge or towards the trailing edge in the region of the airfoil tip. At the same time, an opening is provided in the curvature of the rib. Through this opening a part of the coolant flows in the deflecting region and can pass over into the adjacent cooling duct.