Abstract: The information on the successful application of mass flow meter in the gas flow measurement of coking blast furnace in Xinjie is provided by excellent flowmeter
and flowmeter manufacturers and quotation manufacturers. Abstract: This paper introduces the working principle of ST98 mass flowmeter and its application in blast furnace gas flow measurement (coke oven gas flow measurement). 1. Introduction of ST98 mass flowmeter ST98 mass flowmeter is a kind of air and gas measurement application. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the successful application of mass flowmeters in the measurement of coking blast furnace gas flow in the new iron plant. This paper introduces the working principle of ST98 mass flowmeter and its application in blast furnace gas flow measurement (coke oven gas flow measurement). 1. Introduction to ST98 mass flowmeter The ST98 mass flowmeter is a thermal diffusion mass flowmeter for air and gas measurement applications. The ST98 consists of a flow element, a flow transmitter, and a package. For small pipe diameters, use in-line flow elements. For pipeline sizes larger than 40mm, use plug-in flow elements. The process connection of flow elements can be threaded or flanged. ST98 flow transmitter accepts AC or DC input power, and the output signal can be set to a standard range of current or voltage. An RS-232CI/O serial port provides access to flow meter setup, monitoring and troubleshooting using FCI's FC88 programmer or PC computer. How it works: The flow element of the ST98 uses the principle of thermal diffusion. A low power heater creates a temperature difference between the two RTDs by heating a resistance temperature detector (RTD). The flow of fluid removes the heat from the heated RTD, causing the temperature difference between the two RTDs to be proportional Variety. The flow transmitter of the flowmeter converts the temperature difference between the RTDs into a scale output signal and an optional display value. (1) Main parameters: operating temperature: ambient temperature of the control circuit (-18-60°C); sensor standard temperature (-40-177°C); operating pressure: 0-1.7Mpa; flow range: 0.006-0.23NMPS; signal Output: 4-20mA, 700ΩMaximum load; 0-5, 1-5&0-10VDC100KΩMinimum load flow accuracy:±1%+0.5% of full scale; input power supply: AC input: 100-240VAC, 50/60HzDC input: 22-33VDC2, old coking plant blast furnace gas flow measurement status The old coking plant blast furnace gas flow is measured by an orifice flowmeter. The orifice flowmeter is composed of a throttle pressure taking device and a differential pressure transmitter. It is easy to block, easy to freeze, easy to leak, and heat tracing can easily cause the aging of the differential pressure transmitter device. In some cases, the pressure guiding pipe needs to be added with isolation fluid. The lines are often unequal, resulting in a liquid column difference, which makes the flow indication inaccurate. All of the above will make the flow coefficient change, the measurement accuracy will be reduced, and the measurement error will be large. In addition, it should not be disassembled for maintenance during production. cause the detection point to fail. Inconvenience to production. 3. Measurement status of coking blast furnace gas flow in Xintie Factory The plug-in ST-type mass flowmeter is used for the measurement of coking blast furnace gas flow in Xintie Factory. The advantages of the flowmeter: the integration of the measuring device and the transmission unit completely solves the phenomenon of blocking, freezing and leakage. It should be easy to disassemble, and it can be repaired without production. There are also ranges within the range of this table, which can be set at will. Usually maintenance free. The measurement accuracy is high and accurate. The mass flow meter is flexible in configuration, powerful in function and high in cost performance. It is a new generation of flow meter. 4. The mass flowmeter is installed and used. After the ST mass flowmeter is installed and used, the technicians report that there is a large error between the displayed data and the operating experience data, and communicate with the operator by carefully reading the manual. The reasons are analyzed as follows: 1) During installation, at least 20 times the diameter of the straight pipe section is reserved upstream of the flow element, and 10 times the diameter of the straight pipe section downstream to ensure accuracy; 2) When installing the ST98 mass flowmeter, pay attention to the standard The facet with the flow direction arrow is parallel to the direction of the flow of the process medium, and the flow direction arrow points to the direction of the flow of the process medium; 3) The location of the installation detection point should be at an angle of 45 degrees below the centerline of the pipe; 4) The ST98 mass flowmeter is in The serial number is marked next to the facet with the flow arrow engraved on it, and the same number is also found on the active electronic circuit board and the package of the electronic components. These numbers must match; 5) The insertion depth of the mass flowmeter is equal to 1/2 of the inner diameter of the pipe + 12.7 + the wall thickness of the pipe; 6) There should be no water near the detection point, otherwise the temperature difference will affect the measurement, resulting in inaccurate measurements. After transformation according to the above installation method, the mass flowmeter works stably, and the measurement is accurate, and the expected effect is achieved. 5. Cost analysis An ST98 mass flowmeter is about RMB 50,000. And a set of throttling device including differential pressure transmitter, orifice plate, flange, pressure guiding pipe, valve, protection box, etc. also cost about 15,000 yuan. And every year to repair and replace the spare parts, the installation fee plus the spare parts fee and the maintenance fee also cost a lot every year. In the long run, the use of mass flow meters is cost-effective. 6. Analysis of operation cost Blast furnace gas is used for coke oven heating. Whether the blast furnace gas flow is accurate or not is not only the optimization of the production process. And it plays a decisive role in reducing costs and improving economic efficiency. Therefore, the application of the ST98 mass flow meter saves money and effort, and it does bring many benefits to flow measurement. The coking of the new iron plant not only uses the ST98 mass flow meter for the flow of blast furnace gas, but also uses it in the measurement of the flow of coke oven gas. This table is worthy of promotion! The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Successful Application of Mass Flow Meter in Coking Blast Furnace Gas Flow Measurement in New Iron Works'
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