Comparison of Characteristics of Blast Furnace Gas and Coke Oven Gas and Flow Measurement

Abstract: Comparison of characteristics of blast furnace gas and coke oven gas and information on flow measurement are provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. The gas flowmeter is our company using the traditional differential pressure flowmeter principle to ensure the durability, practicability and long service life of the product. At the same time, it has the advantages of high measurement accuracy and good stability. Flow measuring instrument for flow measurement of various gas, coal. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the comparison of the characteristics of blast furnace gas and coke oven gas and the details of the flow measurement article. The gas flowmeter is our company using the traditional differential pressure flowmeter principle to ensure the durability, practicability and long service life of the product. At the same time, it has the advantages of high measurement accuracy and good stability. The flow measuring instrument used for various gas flow measurement, the whole gas flow meter system consists of: flow sensor (bend pipe sensor), intelligent LCD host, temperature and pressure compensation components and instrument valve components. It is suitable for the measurement of various pure, dirty and corrosive gases, typical applications: measurement of blast furnace gas, coke oven gas, producer gas and other gas media. Below we briefly analyze the characteristics of blast furnace gas and coke oven gas and the flow measurement. I hope to be helpful. Characteristics of blast furnace gas (1) There are many non-combustible components in blast furnace gas, less combustible components (about 30%), and low calorific value, generally 3344—4180 kJ/standard meter; (2) Blast furnace gas is a colorless, odorless and odorless gas, and it is extremely toxic due to its high CO content; (3) The combustion speed is slow, the flame is long, and the temperature difference between the top and bottom of the coke cake is small ; (4) When the coke oven is heated with blast furnace gas, the dust content in the gas is large, and it is easy to block the check bricks of the cushion chamber; (5) The safety specification is stipulated at 1 meter³The CO content in the air cannot exceed 30mg; (6) the ignition temperature is greater than 700OC. (7) Blast furnace gas contains H2 (1.5-3.0%), CH4 (0.2-0.5%), CO (25-30%), CO2 (9-12%), N2 (55-60%), O2 (0.2- 0.4%); the density is 1.29-1.30Kg/Nm3. Characteristics of coke oven gas (1) The calorific value of coke oven gas is 16720 higher—18810KJ/m³, the combustible composition is high (about 90%); (2) coke oven gas is a colorless and odorous gas; (3) coke oven gas is toxic because it contains CO and a small amount of H2S; (4) coke oven gas contains There is a lot of hydrogen, the burning speed is fast, and the flame is short; (5) If the coke oven gas is not purified well, it will contain more tar and naphthalene, which will block the pipes and fittings, which will bring difficulties to the fire adjustment work; (6) Fire The temperature is 600-650OC. (7) Coke oven gas contains H2 (55-60%), CH4 (23-27%), CO (5-8%), CO2 (1.5-3.0%), N2 (3-7%), O2 (<0.5%), CmHn (2-4%); density is 0.45-0.50Kg/Nm3. The flow measurement of gas has a long history of using the principle of differential pressure to measure the flow. The theoretical basis of the measurement is: in a pipeline filled with fluid, a resistance piece (throttle piece) whose flow area is smaller than the cross-sectional area of ​​the pipeline is fixedly placed, then the pipeline When the internal fluid passes through the throttling member, it will cause local contraction, the flow velocity increases and the static pressure decreases at the contraction, so a certain pressure difference will be generated before and after the throttling member. For a certain shape and size of the throttling piece, a certain pressure measurement position and straight pipe sections before and after, and certain fluid parameters, the relationship between the differential pressure ΔP before and after the throttling piece and the flow rate Q conforms to the Bernoulli equation. In the metallurgical industry and coal chemical industry, the composition of various gases is variable and complex, such as blast furnace, coke oven, converter gas containing a large amount of dust, particles, tar, naphthalene and other impurities with varying degrees and low flow rates, especially in the actual situation. Tar and naphthalene in the gas adhere to the throttling parts and pressure measuring holes and crystallize at low temperature, the dust and particles in the gas block the instrument, and the moisture in the gas freezes in winter, all of which will cause the pressure measurement of the flowmeter. The hole is blocked, the throttling part is deformed, and in severe cases, the fluid can not be circulated in the pipeline. Secondly, due to the introduction of throttling parts, the pressure loss of the pipeline is large, which increases the energy consumption of the factory. With pipe diameter asΦ325×13mm, measured with orifice plate, differential pressure 30Kpa,β=0.7, the pressure loss generated by the orifice plate: PPLo=0.5×30=15.0KPa or more is our analysis for you, I believe it will make everyone have a further understanding of the product. If you want to know more about gas flow meters, please consult us. We will provide you with the information you need in the best possible time. So please believe it when you need to buy an instrument. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Characteristic comparison and flow measurement of blast furnace gas and coke oven gas'

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