Water flow meter

『Water flow meter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. What does a negative flow difference represent when the small sleeve of the blast furnace leaks?

When the small sleeve of the blast furnace leaks and becomes trapped, the negative flow difference indicates that the measured outflow flow rate is greater than the measured inflow flow rate, which is a typical abnormal signal of serious damage and backflow of the small sleeve, rather than simply cooling water leaking out quietly. Firstly, clarify the definition of conventional flow rate difference on site: the difference in cooling water volume is calculated by subtracting the reading of the inlet flow meter from the reading of the outlet flow meter. Under normal operating conditions, the difference is a small positive value (usually 0-2m ³/h), and the error comes from pipeline resistance, a small amount of cooling water evaporation, or measurement deviation.

1. Non fault abnormal scenarios that need to be prioritized for elimination Flow meter measurement failure: For example, the inlet flow meter is blocked by furnace dust or the signal component is offset, resulting in the measured inlet flow rate being lower than the actual value; Or the calibration deviation of the water flow meter may result in a false high reading and ultimately calculate a negative flow difference.

2. Pipeline pressure backflow: If the pressure of the return water main is higher than that of the inlet main of this small set, some of the return water will flow back into the inlet pipeline, causing the reading of the inlet flow meter to be false low and resulting in a negative flow difference.

Second, the core abnormal scenario of small sleeve leakage: When the small sleeve is perforated and damaged, the operating

positive pressure inside the blast furnace (usually 0.2~0.3 MPa) will exceed the operating pressure of the cooling water pipe (usually 0.3~0.5 MPa, which will be lower than the furnace pressure when the furnace condition fluctuates or the water pump fails). High pressure gas, dust, and even a small amount of molten slag and iron debris inside the furnace will flow back into the small sleeve cooling chamber and flow out from the outlet pipe.

. At this time, the outlet flow rate detected by the Qicangshan flowmeter may have a reading deviation due to the mixing of non cooling water medium, or additional fluid may actually enter the outlet pipeline, ultimately resulting in the measured outlet flow rate being greater than the inlet flow rate, forming a negative flow difference. This anomaly is usually accompanied by other symptoms, such as gas hissing and abnormal noise in the water outlet pipe, sudden rise in corresponding furnace skin temperature, and slight fluctuations in blast furnace air pressure. It is necessary to immediately stop the cooling water supply of this small set and contact professional personnel to carry out a shutdown inspection and treatment according to the blast furnace cooling system maintenance regulations to avoid further damage and safety accidents.

2. Pipeline flow meter

3. The function of flow meters used in fire protection systems, as well as the requirements of fire protection installation regulations, is to read the flow rate or flow of water flow.
According to the specifications, both the fire hydrant system and the sprinkler system need to be equipped with flow meters. These flow meters are mainly installed on the main pipe of the water pump outlet, and their main fu

1. What does a negative flow difference represent when the small sleeve of the blast furnace leaks?

2. Pipeline flow meter

『SILVER Official Website SERVICE』