Wenqiu Li flowmeter| electromagnetic flow meter high flow

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1. Advantages and disadvantages of Venturi flowmeter

Venturi flowmeter is a high-precision, low pressure loss differential pressure flow measurement device. The core advantages and disadvantages of Shimin are compared, such as the bounce back collision

Steam 2 Disadvantages • Strict installation conditions: the length of the front straight pipe section is required to be ≥ 10D (pipe diameter), and the length of the rear straight pipe section is required to be ≥ 5D, with poor applicability in limited space scenarios • High initial cost: the cost of DN500 caliber and above can be 3-5 times that of the orifice flow meter, and it needs to be matched with a differential pressure transmitter • Difficult maintenance: measuring the thickness of the inner wall of the pipe scaling beyond 1mm will affect accuracy, and cleaning requires specialized equipment to stop the operation • Limited range ratio: the standard range ratio is usually 3:1, which is lower than that of vortex flow meters (10:1) and electromagnetic flow meters (100:1). 3 Application recommendations: Priority should be given to scenarios such as clean media (natural gas, softened water), large pipe flow measurement (DN200 or above), and working conditions with high energy-saving requirements. Avoid use scenarios such as small and medium-sized projects with solid particle fluids, limited installation space, and budget constraints. 2. What are the specific application scenarios of Wenqiu Li flowmeter in power plants? The core application scenario of Wenqiu flowmeter in power plants revolves around precise measurement and energy consumption control of various fluid media, covering the entire process of the main and auxiliary systems The measurement of th

e main steam system is mainly used for monitoring the flow of the main steam and reheated steam of the generator set. By accurately measuring the steam flow and calculating the coal consumption and plant power consumption rate in conjunction with pressure and temperature parameters, it is a thermal performance test for power plants The core equipment for AGC load dispatch is the equipment for measuring the amount of waste. Some units with a capacity of over 300MW will install multiple Venturi flow meters in the main steam header and high and low side pipelines to achieve zoning measurement. 2. The measurement of the feedwater system is applied to the measurement of boiler feedwater and condensate flow, and accurate measurement of feedwater flow is a key parameter for balancing the boiler steam water system and regulating the superheated steam temperature. It can also be used to calculate the thermal efficiency and water replenishment rate of boiler flushing and combustion leakage. Some supercritical units will install Venturi flow meters in the feedwater bypass and condensate fine treatment inlet and outlet to avoid the problem of conventional orifice plates being easily eroded and worn by two-phase flow of steam and water. 3. The measurement of the flue gas system includes monitoring of the exhaust gas, primary air, and secondary air flow at the outlet of the induced draft fan: Wind measurement is used to control the concentration of coal powder transportation and ensure the stability of boiler combustion; -Secondary air metering combined with oxygen analyzer to achieve combustion optimization, reduce NOx emissions and coal consumption; -Some power plants will also install Venturi flow meters in the desulfurization and

Wenqiu Li flowmeter

1. Advantages and disadvantages of Venturi flowmeter

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