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What are the flow regulation methods for metering pumps?
2. Is there any difference in the effectiveness of using a steam flowmeter in a straight and inverted position?
There is a significant difference in the effectiveness of using steam flow meters in a simulated open and inverted manner, which directly affects measurement accuracy, equipment service life, and operational safety Measurement accuracy difference: The vast majority of mainstream steam flow meters (such as orifice plates, vortex streets, and turbine types) have clear fluid flow design requirements. When installed, the fluid passes through the sensor along the calibrated flow direction, and the measurement error conforms to the factory calibration range. Inverted flow will disrupt the physical mechanism of flow detection: the pressure difference signal of the orifice flowmeter will reverse, the calculation logic of the vortex shedding frequency of the vortex flowmeter will fail, the rotation direction of the turbine/impeller instrument does not match the calibration logic, ultimately leading to measurement deviation, and in severe cases, it is impossible to accurately measure steam flow. 2. Equipment life difference: During installation, fluid erosion and component stress meet the design conditions, wear is uniform, and the rated service life can be achieved. After inversion: firstly, the load-bearing components such as bearings and shaft seals are subjected to reverse loads, which exacerbates local wear and tear; Secondly, the condensed water and impurities carried by the fluid will deposit in non designed vulnerable areas, such as the non working face of turbine blades and downstream side of throttling devices, accelerating component
3. Operational safety hazards: Some steam flow meters with integrated one-way check structures may fail their check function when inverted, which may cause steam backflow, leading to safety issues such as water hammer in pipelines and abnormal negative pressure in boilers; At the same time, when the pressure and temperature detection points are inverted with the instrument, the control system will obtain incorrect parameters of the working hood condition, which may cause misoperation or risk of overpressure or undervoltage. When installing a steam flowmeter, it is necessary to strictly follow the flow direction arrow marked on the instrument body, and it is strictly prohibited to invert it. Otherwise, not only can it not achieve accurate measurement, but it may also cause equipment damage or safety accidents.
3. What are the reasons for high water consumption in the production process of mines?
The core reasons for high water consumption in mine production can be divided into five categories: equipment pipe network leakage, improper process control, geological and hydrological changes, management and operation omissions, and external abnormalities.
1. Equipment and pipe network leakage (1) Water supply pipeline loss.
The underground water pipeline has been exposed to a high humidity and sulfide containing corrosive environment for a long time. After exceeding its service life, the pipe wall perforation and flange interface sealing gasket aging and failure occur, causing continuous leakage and dripping; 2. The temporary water supply hose was damaged due to underground dragging and heavy equipment crushing, and was not repl
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