How to select V cone flow meter for coke oven gas?

Project Overview

In the coking industry, coke oven gas flow measurement is an important link in the production process, which is directly related to production efficiency and energy utilization. As a commonly used flow measurement instrument, V-cone flowmeter has been widely used in coke oven gas flow measurement because of its high accuracy, wide range ratio and good vibration resistance. However, how to correctly select a V-cone flowmeter to ensure that it can work accurately and stably in practical applications is a problem that every coking company needs to face. 1. Characteristic analysis of coke oven gas Coke oven gas is a complex mixed gas, mainly composed of hydrogen, methane, carbon monoxide, carbon dioxide, nitrogen, etc. Its composition and flow rate are affected by many factors, such as coke oven operating conditions, raw materials Coal quality, coke production, etc. Coke oven gas has a large flow range and contains a certain amount of dust and tar. These characteristics put forward higher requirements for the selection and use of flow meters.

II. Key points for V-cone flowmeter selection 1. Determine the measurement range: First, you need to determine the measurement range of the V-cone flowmeter based on the actual flow variation range of coke oven gas. Generally speaking, in order to ensure the accuracy of measurement, a flowmeter with a large range ratio and a low lower measurement limit should be selected. 2. Consider the fluid characteristics: Coke oven gas contains a certain amount of dust and tar. These impurities will cause wear and blockage of the flow meter. Therefore, when selecting, you need to choose a flowmeter with good wear resistance and self-cleaning ability, such as a V-cone flowmeter with a purge device. 3. Consider the installation conditions: The installation position and method of the V-cone flowmeter have a great impact on its measurement performance. When selecting, factors such as pipeline layout, medium flow direction, and installation space need to be considered to ensure that the flow meter can be installed in the appropriate location and is easy to maintain and repair. 4. Choose appropriate materials: Coke oven gas is corrosive to a certain extent, so you need to choose corrosion-resistant materials, such as stainless steel, etc. when selecting. At the same time, it is also necessary to consider the impact of materials on fluid properties to avoid problems such as chemical reactions or scaling. 5. Consider accuracy and stability: Accuracy and stability are important indicators of flow meter performance. When selecting, you need to choose a flow meter with high accuracy and good stability to ensure the accuracy and reliability of the measurement results. 4. V-cone flowmeter selection example: Take a coking enterprise as an example. Its coke oven gas flow range is 500~5000m³/h, which contains a certain amount of dust and tar. When selecting the model, we chose a V-cone flowmeter with a turndown ratio of 10:1, made of stainless steel 316L, and equipped with a purge device. The flow meter has high measurement accuracy and stability and can meet the actual needs of the enterprise. In practical applications, the V-cone flowmeter has shown good measurement performance and vibration resistance, and can work stably even in environments with large vibrations. At the same time, due to the use of a purging device, the clogging problem of dust and tar is effectively avoided, ensuring the accuracy and reliability of the measurement results.