3 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.

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.

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.