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The temperature of the fluid flow measurement
Published on:2015-3-5 10:20:33 Hits:

When it comes to high-temperature fluids, meaning not give a clear definition of the next high-temperature range. Currently, industrial measuring instruments, different types, are themselves a respective predetermined temperature range. For example: a thermometer in the range of 1500 ~ 2000 ℃ is a high temperature range, for the control valve, the switching valve and other valves, when it comes to high temperature, means more than 400 ~ 500 ℃ temperature. Meter structure is also different principles and provisions of the way different temperature ranges. Now the practical upper limit for industrial temperature differential pressure flow throttle body is about 540 ℃, volumetric flowmeter is about 200 ℃, area flow meter is about 400 ℃.

The need for measurement, but the measurement representative of some of the problems of the high temperature fluid, we include the following three types. As a medium or high temperature gas thermal energy, high-temperature steam, fast breeder reactors, the strong thermal coal quality - liquid metal sodium; iron and steel industry in the molten iron, molten steel. Is this three fluids, for different accuracy and use of materials, the main points when measured flow requirements were also different from the general common narrative is difficult. Therefore, this chapter only the practical problem of high temperature gas, high temperature steam orifice flowmeter is used to measure the liquid metal and electromagnetic flowmeter is described as the center temperature of the fluid flow measurement.

For the method of hot metal, molten steel flow measurement there are two: one is the application of high-frequency skin effect of the flow channel cross-sectional area measured way; the other is the way electromagnetic flowmeter. Both methods can be used for continuous steelmaking equipment. In order to carry out direct, non-contact form of measurement, also carried out extensive research and discussion, but, in fact, generally through the flow of the liquid column height or weight in terms of batch processing. Therefore, this chapter without narrative. Further, when the liquid metal sodium flow measurement, the test detector installed in the pipe outside ultrasonic type, will soon be practical, without also described herein.

Measuring the flow rate of the high temperature fluid with the throttle mechanism

Application examples of various devices

High temperature fluid to the power sector, iron and steel, chemical industries, the scope is very wide, they must deal with many types of fluids. When carrying out measurement of liquid, vapor, gas flow rate, a plurality of types of different people from the schematic arrangement of a flow meter, differential pressure flow first studied throttle mechanism is applicable, but in fact applied the most. This is because of its simple structure, but there is a wealth of data and practical experience. As a result, the throttle device as a process instrumentation, its credibility than any other instruments are the subject of attention.

Power generation and power plant business with each plant with high efficiency and high capacity as the goal, the steam temperature and pressure of the boiler up to the critical temperature and pressure. Such high temperature steam and high-pressure superheated steam, its temperature reaches 568 ℃, a pressure of 240 kgf / cm 2. The flow of high-pressure steam from the boiler turbine nozzle and other general traffic throttling device to measure.

In steel, iron, and will raise the temperature of the combustion air and then blown into the furnace, converter, sintering furnace furnace. The combustion air flow throttling device can be used to measure the venturi tubes. In addition, the exhaust gases from the furnace also belong to these high-temperature range, the measurement can be of the venturi flow.

Due to the high temperature exhaust gas of gas, which is corrosive and contains dust, in the selection of materials, to consider these characteristics and conditions of use, use in line with the intended use, the corrosion resistance of the material.

In the chemical, petrochemical industry, for example: hydrogen plant, by steam reforming method reformer furnace, the temperature of the reaction tube is also added about 800-900 ℃. Contact refined oil upgrading equipment. Temperature is 420 ~ 580 ℃, the pressure is within 15 - 50 kg / cm 2. These devices, although high temperature furnace temperature, but is to measure and control the flow rate into the furnace before, so. Then a high temperature without measuring fluid.

More than just cite a few examples. High-temperature fluid to be measured are still many, many others.

When considering the flow throttle fluid temperature measuring device, and select the valve-like material, as in the importance of temperature while particular attention to the pressure.

Select the appropriate material, can be measured temperature range of flow. But from the point of view of material strength, tensile strength, yield point decreases with increasing temperature, when reached about 400 ℃ above, the creep phenomenon appeared, therefore, this temperature can be seen as a throttle device in the highest temperature . The following matters should be noted when using the range described.

Structure

Construction on the throttle device has been described in detail, described here only a matter should be particularly aware of. When it comes to high-temperature fluids, meaning not give a clear definition of the next high-temperature range. Currently, industrial measuring instruments, different types, are themselves a respective predetermined temperature range. For example: a thermometer in the range of 1500 ~ 2000 ℃ is a high temperature range, for the control valve, the switching valve and other valves, when it comes to high temperature, means more than 400 ~ 500 ℃ temperature. Meter structure is also different principles and provisions of the way different temperature ranges. Now the practical upper limit for industrial temperature differential pressure flow throttle body is about 540 ℃, volumetric flowmeter is about 200 ℃, area flow meter is about 400 ℃.

The need for measurement, but the measurement representative of some of the problems of the high temperature fluid, we include the following three types. As a medium or high temperature gas thermal energy, high-temperature steam, fast breeder reactors, the strong thermal coal quality - liquid metal sodium; iron and steel industry in the molten iron, molten steel. Is this three fluids, for different accuracy and use of materials, the main points when measured flow requirements were also different from the general common narrative is difficult. Therefore, this chapter only the practical problem of high temperature gas, high temperature steam orifice flowmeter is used to measure the liquid metal and electromagnetic flowmeter is described as the center temperature of the fluid flow measurement.

For the method of hot metal, molten steel flow measurement there are two: one is the application of high-frequency skin effect of the flow channel cross-sectional area measured way; the other is the way electromagnetic flowmeter. Both methods can be used for continuous steelmaking equipment. In order to carry out direct, non-contact form of measurement, also carried out extensive research and discussion, but, in fact, generally through the flow of the liquid column height or weight in terms of batch processing. Therefore, this chapter without narrative. Further, when the liquid metal sodium flow measurement, the test detector installed in the pipe outside ultrasonic type, will soon be practical, without also described herein.

Measuring the flow rate of the high temperature fluid with the throttle mechanism

Application examples of various devices

High temperature fluid to the power sector, iron and steel, chemical industries, the scope is very wide, they must deal with many types of fluids. When carrying out measurement of liquid, vapor, gas flow rate, a plurality of types of different people from the schematic arrangement of a flow meter, differential pressure flow first studied throttle mechanism is applicable, but in fact applied the most. This is because of its simple structure, but there is a wealth of data and practical experience. As a result, the throttle device as a process instrumentation, its credibility than any other instruments are the subject of attention.

Power generation and power plant business with each plant with high efficiency and high capacity as the goal, the steam temperature and pressure of the boiler up to the critical temperature and pressure. Such high temperature steam and high-pressure superheated steam, its temperature reaches 568 ℃, a pressure of 240 kgf / cm 2. The flow of high-pressure steam from the boiler turbine nozzle and other general traffic throttling device to measure.

In steel, iron, and will raise the temperature of the combustion air and then blown into the furnace, converter, sintering furnace furnace. The combustion air flow throttling device can be used to measure the venturi tubes. In addition, the exhaust gases from the furnace also belong to these high-temperature range, the measurement can be of the venturi flow.

Due to the high temperature exhaust gas of gas, which is corrosive and contains dust, in the selection of materials, to consider these characteristics and conditions of use, use in line with the intended use, the corrosion resistance of the material.

In the chemical, petrochemical industry, for example: hydrogen plant, by steam reforming method reformer furnace, the temperature of the reaction tube is also added about 800-900 ℃. Contact refined oil upgrading equipment. Temperature is 420 ~ 580 ℃, the pressure is within 15 - 50 kg / cm 2. These devices, although high temperature furnace temperature, but is to measure and control the flow rate into the furnace before, so. Then a high temperature without measuring fluid.

More than just cite a few examples. High-temperature fluid to be measured are still many, many others.

When considering the flow throttle fluid temperature measuring device, and select the valve-like material, as in the importance of temperature while particular attention to the pressure.

Select the appropriate material, can be measured temperature range of flow. But from the point of view of material strength, tensile strength, yield point decreases with increasing temperature, when reached about 400 ℃ above, the creep phenomenon appeared, therefore, this temperature can be seen as a throttle device in the highest temperature . The following matters should be noted when using the range described.

Structure

Construction on the throttle device has been described in detail, described here only a matter should be particularly aware of.

When it comes to high-temperature fluids, meaning not give a clear definition of the next high-temperature range. Currently, industrial measuring instruments, different types, are themselves a respective predetermined temperature range. For example: a thermometer in the range of 1500 ~ 2000 ℃ is a high temperature range, for the control valve, the switching valve and other valves, when it comes to high temperature, means more than 400 ~ 500 ℃ temperature. Meter structure is also different principles and provisions of the way different temperature ranges. Now the practical upper limit for industrial temperature differential pressure flow throttle body is about 540 ℃, volumetric flowmeter is about 200 ℃, area flow meter is about 400 ℃.

The need for measurement, but the measurement representative of some of the problems of the high temperature fluid, we include the following three types. As a medium or high temperature gas thermal energy, high-temperature steam, fast breeder reactors, the strong thermal coal quality - liquid metal sodium; iron and steel industry in the molten iron, molten steel. Is this three fluids, for different accuracy and use of materials, the main points when measured flow requirements were also different from the general common narrative is difficult. Therefore, this chapter only the practical problem of high temperature gas, high temperature steam orifice flowmeter is used to measure the liquid metal and electromagnetic flowmeter is described as the center temperature of the fluid flow measurement.

For the method of hot metal, molten steel flow measurement there are two: one is the application of high-frequency skin effect of the flow channel cross-sectional area measured way; the other is the way electromagnetic flowmeter. Both methods can be used for continuous steelmaking equipment. In order to carry out direct, non-contact form of measurement, also carried out extensive research and discussion, but, in fact, generally through the flow of the liquid column height or weight in terms of batch processing. Therefore, this chapter without narrative. Further, when the liquid metal sodium flow measurement, the test detector installed in the pipe outside ultrasonic type, will soon be practical, without also described herein.

Measuring the flow rate of the high temperature fluid with the throttle mechanism

Application examples of various devices

High temperature fluid to the power sector, iron and steel, chemical industries, the scope is very wide, they must deal with many types of fluids. When carrying out measurement of liquid, vapor, gas flow rate, a plurality of types of different people from the schematic arrangement of a flow meter, differential pressure flow first studied throttle mechanism is applicable, but in fact applied the most. This is because of its simple structure, but there is a wealth of data and practical experience. As a result, the throttle device as a process instrumentation, its credibility than any other instruments are the subject of attention.

Power generation and power plant business with each plant with high efficiency and high capacity as the goal, the steam temperature and pressure of the boiler up to the critical temperature and pressure. Such high temperature steam and high-pressure superheated steam, its temperature reaches 568 ℃, a pressure of 240 kgf / cm 2. The flow of high-pressure steam from the boiler turbine nozzle and other general traffic throttling device to measure.

In steel, iron, and will raise the temperature of the combustion air and then blown into the furnace, converter, sintering furnace furnace. The combustion air flow throttling device can be used to measure the venturi tubes. In addition, the exhaust gases from the furnace also belong to these high-temperature range, the measurement can be of the venturi flow.

Due to the high temperature exhaust gas of gas, which is corrosive and contains dust, in the selection of materials, to consider these characteristics and conditions of use, use in line with the intended use, the corrosion resistance of the material.

In the chemical, petrochemical industry, for example: hydrogen plant, by steam reforming method reformer furnace, the temperature of the reaction tube is also added about 800-900 ℃. Contact refined oil upgrading equipment. Temperature is 420 ~ 580 ℃, the pressure is within 15 - 50 kg / cm 2. These devices, although high temperature furnace temperature, but is to measure and control the flow rate into the furnace before, so. Then a high temperature without measuring fluid.

More than just cite a few examples. High-temperature fluid to be measured are still many, many others.

When considering the flow throttle fluid temperature measuring device, and select the valve-like material, as in the importance of temperature while particular attention to the pressure.

Select the appropriate material, can be measured temperature range of flow. But from the point of view of material strength, tensile strength, yield point decreases with increasing temperature, when reached about 400 ℃ above, the creep phenomenon appeared, therefore, this temperature can be seen as a throttle device in the highest temperature . The following matters should be noted when using the range described.

Structure

Construction on the throttle device has been described in detail, described here only a matter should be particularly aware of. When it comes to high-temperature fluids, meaning not give a clear definition of the next high-temperature range. Currently, industrial measuring instruments, different types, are themselves a respective predetermined temperature range. For example: a thermometer in the range of 1500 ~ 2000 ℃ is a high temperature range, for the control valve, the switching valve and other valves, when it comes to high temperature, means more than 400 ~ 500 ℃ temperature. Meter structure is also different principles and provisions of the way different temperature ranges. Now the practical upper limit for industrial temperature differential pressure flow throttle body is about 540 ℃, volumetric flowmeter is about 200 ℃, area flow meter is about 400 ℃.

The need for measurement, but the measurement representative of some of the problems of the high temperature fluid, we include the following three types. As a medium or high temperature gas thermal energy, high-temperature steam, fast breeder reactors, the strong thermal coal quality - liquid metal sodium; iron and steel industry in the molten iron, molten steel. Is this three fluids, for different accuracy and use of materials, the main points when measured flow requirements were also different from the general common narrative is difficult. Therefore, this chapter only the practical problem of high temperature gas, high temperature steam orifice flowmeter is used to measure the liquid metal and electromagnetic flowmeter is described as the center temperature of the fluid flow measurement.

For the method of hot metal, molten steel flow measurement there are two: one is the application of high-frequency skin effect of the flow channel cross-sectional area measured way; the other is the way electromagnetic flowmeter. Both methods can be used for continuous steelmaking equipment. In order to carry out direct, non-contact form of measurement, also carried out extensive research and discussion, but, in fact, generally through the flow of the liquid column height or weight in terms of batch processing. Therefore, this chapter without narrative. Further, when the liquid metal sodium flow measurement, the test detector installed in the pipe outside ultrasonic type, will soon be practical, without also described herein.

Measuring the flow rate of the high temperature fluid with the throttle mechanism

Application examples of various devices

High temperature fluid to the power sector, iron and steel, chemical industries, the scope is very wide, they must deal with many types of fluids. When carrying out measurement of liquid, vapor, gas flow rate, a plurality of types of different people from the schematic arrangement of a flow meter, differential pressure flow first studied throttle mechanism is applicable, but in fact applied the most. This is because of its simple structure, but there is a wealth of data and practical experience. As a result, the throttle device as a process instrumentation, its credibility than any other instruments are the subject of attention.

Power generation and power plant business with each plant with high efficiency and high capacity as the goal, the steam temperature and pressure of the boiler up to the critical temperature and pressure. Such high temperature steam and high-pressure superheated steam, its temperature reaches 568 ℃, a pressure of 240 kgf / cm 2. The flow of high-pressure steam from the boiler turbine nozzle and other general traffic throttling device to measure.

In steel, iron, and will raise the temperature of the combustion air and then blown into the furnace, converter, sintering furnace furnace. The combustion air flow throttling device can be used to measure the venturi tubes. In addition, the exhaust gases from the furnace also belong to these high-temperature range, the measurement can be of the venturi flow.

Due to the high temperature exhaust gas of gas, which is corrosive and contains dust, in the selection of materials, to consider these characteristics and conditions of use, use in line with the intended use, the corrosion resistance of the material.

In the chemical, petrochemical industry, for example: hydrogen plant, by steam reforming method reformer furnace, the temperature of the reaction tube is also added about 800-900 ℃. Contact refined oil upgrading equipment. Temperature is 420 ~ 580 ℃, the pressure is within 15 - 50 kg / cm 2. These devices, although high temperature furnace temperature, but is to measure and control the flow rate into the furnace before, so. Then a high temperature without measuring fluid.

More than just cite a few examples. High-temperature fluid to be measured are still many, many others.

When considering the flow throttle fluid temperature measuring device, and select the valve-like material, as in the importance of temperature while particular attention to the pressure.

Select the appropriate material, can be measured temperature range of flow. But from the point of view of material strength, tensile strength, yield point decreases with increasing temperature, when reached about 400 ℃ above, the creep phenomenon appeared, therefore, this temperature can be seen as a throttle device in the highest temperature . The following matters should be noted when using the range described.

Structure

Construction on the throttle device has been described in detail, described here only a matter should be particularly aware of.


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