8 results about "Water density" patented technology

The invention belongs to the technical field of power station boiler waste heat recycling energy-saving equipment and relates to a plate-and-shell type coal economizer. The plate-and-shell type coal economizer comprises a corrugated plate heat exchange core body (1), a heat exchanger shell (2), a first and a second water inlet / outlet water tank (3, 3') and a first and a second exhaust gas inlet / outlet pipeline (4, 4'), wherein the corrugated plate heat exchange core body (1) is mounted in the heat exchanger shell (2), the first and second water inlet / outlet water tanks (3, 3') are respectively arranged at the upper and lower ends of the front side of the corrugated plate heat exchange core body (1), and the first and second exhaust gas inlet / outlet pipelines (4, 4') are respectively arranged at the upper and lower sides of the corrugated plate heat exchange core body (1). The plate-and-shell type coal economizer solves the problem that the length of a water passage needs to be increased to solve the problem of unapparent water heating due to the great difference between an exhaust gas density and a water density, and meanwhile, a corrugated passage at the exhaust gas side enables the exhaust gas flow turbulivity to be increased and the heat transfer efficiency to be improved; the blockage due to ash accumulation happens rarely, even if the ash is accumulated, the cleaning is easy to finish.

A counter-flow cooling tower in which water and air run separately. The filler is composed of numerous small funnels to increase the surface area. The water drops pass through the funnel-shaped water outlet holes from top to bottom to form small and dense new water drops. The air does not pass through the filler from bottom to top from the same hole as in a counter-flow tower, but runs obliquely upward along the space between the fillers. The shape and structure are similar to those of a counter-flow tower, but the operation mode is similar to that of a cross-flow tower. The difference is that the raindrops formed are dense and small, and there is no idle space in the middle of the cross-flow tower. This fundamentally solves the problems of large space, short-circuit of air volume and uneven water temperature in the cross-flow tower. It also solves the problems of low water density, large air resistance and mutual restriction of water and air in the counter-flow tower.

The invention discloses an in-situ low-deflection hydrological survey device, and belongs to the technical field of hydrological survey. The device comprises a low-deflection measuring body, an empennage system, a still water chamber and a measurement control system. The head of the measuring body is of a streamline structure to greatly reduce flow field disturbance. The cross-shaped empennage system provides hydrodynamic force damping, pitching, rolling and yawing movement of the device underwater is effectively restrained, and it is guaranteed that the measuring posture is stable. And the still water chamber is communicated with the outside through a plurality of permeable channels. During measurement, the on-off of the valve is controlled, and the water density is inversed according to the measured value change of the pressure sensor in the still water chamber so as to calculate the sand content; meanwhile, the flow velocity is calculated through the difference between the total water flow pressure and the static pressure sensed by the measuring device body and the real-time density. The device can realize synchronous, in-situ and high-frequency online measurement of the flow velocity and the sand content of the same microscopic water body unit, and has the advantages of high precision, good stability and strong environmental adaptability.

The utility model discloses a sewage cleaning fence for water conservancy projects, including a mounting frame, the mounting frame is arranged in a rectangular frame, the relative inner walls of the mounting frame are provided with a slide groove, and also includes a fixed plate and a sewage separation and drainage mechanism, the fixed plate is fixedly connected between the upper and lower side walls at one end of the mounting frame, the fixed plates are arranged in uniform intervals, the sewage separation and drainage mechanism is limited and slides in the mounting frame through the slide groove, and is interspersed with the evenly spaced fixed plates to adjust the density of the fence. The utility model belongs to the technical field of water conservancy projects, specifically a sewage separation at the drainage port of water conservancy projects, promotes drainage, increases the drainage density, isolates different sizes of sewage, pushes the sewage to move through the sewage separation and drainage mechanism, makes the adjustment plate and the fixed plate intersperse and cooperate, adjusts the water flow isolation density, drives the screw to rotate through the rotating motor, makes the connecting sleeve and the push rod move downward, and the adjustment plate intersperses and moves in the fixed plate, effectively improving the sewage interception of sewage cleaning fences for water conservancy projects.

The present application discloses a method for determining the maximum adsorbed water content based on water density, comprising the following steps: S1, measuring the gas volume in a dried soil sample by a helium pycnometer to obtain the density of the solid particles of the soil sample; S2, measuring the gas volume in the soil samples under several different water content states, and obtaining the total volume of the solid particles and pore water of the soil sample under each water content state by calculation; S3, drying the soil samples with different water contents to obtain the mass of the pore water in the soil samples, and calculating the volume of the pore water in the soil samples with different water contents using the density of the solid particles of the soil samples in S1; S4, calculating the density of the pore water in the soil sample under each different water content state to obtain the average water density; or calculating the mass increment and volume increment of the pore water in the soil samples under two adjacent different water content states to obtain the incremental water density; S5, obtaining the maximum adsorbed water content of the soil sample according to the average water density or the incremental water density.

The invention discloses an oil reservoir water cone height and water cone radius calculation method, system, equipment and medium, a karst cave type reservoir is regarded as a cylinder, and the flow velocity V of different parts in a karst cave is obtained according to the oil column height H, the borehole radius rw and the oil well yield q; according to the water density, the oil density and the water cone height h, the gravity difference dp at the oil-water interface in the stable water drive process is obtained; taking the gravity difference dp at the oil-water interface in the stable water flooding process as the pressure drop P at the oil-water interface; a relational expression between the internal pressure drop P and the flow velocity V is obtained through a binomial equation of hydrodynamics, and a relational expression between the height h of the water cone and the radius R of the water cone is obtained through conversion. According to the method, the relation between the radius of the water cone in the karst cave and the height of the water cone can be quantitatively described, a curve graph of the relation between the radius of the water cone and the height of the water cone under different well depth conditions can be quantitatively made by combining well testing data, and data are provided for injection-production adjustment and development adjustment.

This invention belongs to the field of wastewater treatment technology, specifically a multi-stage adjustable-angle high-density sedimentation tank and its working method. It includes a sedimentation tank body, which comprises a water-holding tank with an inlet fixedly inserted through its side wall. By adjusting the movement of the bottom of the adjusting plate, the inclination angle of the inclined plate formed by the adjusting plate and the first rotating plate is reduced. A displacement ring adjusts the angle of the inclined plate in real time according to the water density, allowing the inclined plate to adapt to changes in water density, thereby improving sedimentation efficiency, reducing the amount of coagulant added, or extending the retention time, thus reducing wastewater treatment costs. Furthermore, by the float slowly descending synchronously with the water level, the water is kept in a relatively static or low-velocity state, while the local velocity changes caused by the movement of the second rotating plate are small, reducing disturbance during scraping and thus helping to ensure stable effluent quality.

A slow sinking fishing weight is made from a material having a bulk density which is slightly greater than the density of water and includes deep surface channels that significantly increase its resistance to movement in water. The fishing weight has a sink rate in calm water which is less than one foot per second. The slow sinking fishing weight allows a person to more easily maintain the depth of the sinking weight and an attached lure while moving the lure through the water.