A humidifying gas flow measurement device and method

Abstract

This invention discloses a humidifying gas flow measurement device and method. The output end of a humidifier is connected to the side of a gas pipeline for circulating the gas to be measured. Two sets of temperature and humidity measurement units are used to measure the dry-bulb temperature and relative humidity of the gas before and after humidification by the humidifier, respectively. A processing unit is used to calculate the flow rate of the gas. This invention places the measuring probes of the two sets of temperature and humidity measurement units inside the gas pipeline, where their surfaces exchange with the air. By monitoring the temperature and humidity parameters of the gas exchange through the measurement units, the gas flow rate of the pipeline is calculated. The method is simple and highly accurate.

Description

Technical Field

[0001] This invention relates to the field of airflow measurement, specifically to a humidifying gas flow measurement device and method. Background Technology

[0002] A humidifying gas flow meter is a type of air flow meter. It involves placing a sensor on the gas pipeline and monitoring the temperature and humidity parameters by reading the data from the sensor. The sensor is placed inside the gas pipeline, and its surface exchanges air with the gas. By monitoring the temperature and humidity parameters of this gas exchange, the gas flow rate in the pipeline can be calculated. Summary of the Invention

[0003] The purpose of this invention is to provide a new air flow meter. The air flow meter provided by this invention is a humidifying gas flow measurement device, comprising:

[0004] A humidifier, the output end of which is connected to the side of a gas pipe for circulating the gas to be tested;

[0005] Two sets of temperature and humidity measurement units are used to measure the dry bulb temperature and relative humidity of the gas to be tested before and after humidification by the humidifier; the dry bulb temperature and relative humidity of the gas to be tested before humidification by the humidifier are denoted as T1 and φ1, respectively, and the dry bulb temperature and relative humidity of the gas to be tested after humidification by the humidifier are denoted as T2 and φ2, respectively, and the humidification amount is denoted as G;

[0006] The processing unit is used to calculate the flow rate Q of the gas to be measured, using the following formula:

[0007] Q = G / (d2-d1);

[0008] Where d1 and d2 represent the moisture content of the gas being tested before and after humidification by the humidifier, respectively. , , , , and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T1 and relative humidity φ1, respectively. and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T2 and relative humidity φ2, respectively. , The dry-bulb temperature is in degrees Celsius, the moisture content and humidification are in grams, and the saturated water vapor pressure is in Pascals.

[0009] Preferably, in the humidifying gas flow measurement device of the present invention, the side of the gas pipe is provided with a plurality of mounting holes, which are respectively used to connect the output end of the humidifier and the temperature and humidity measuring unit, the connection and mounting parts are sealed, and the measuring probes of the two sets of temperature and humidity measuring units extend into the gas pipe.

[0010] Preferably, in the humidifying gas flow measurement device of the present invention, the humidifier, two sets of temperature and humidity measurement units, the processing unit, and the gas pipeline together constitute the humidifying gas flow measurement device, and one end of the gas pipeline is used to connect to the input pipeline of the gas to be measured.

[0011] Preferably, in the humidifying gas flow measuring device of the present invention, the humidifier, the temperature and humidity measuring unit, and the processing unit together constitute the humidifying gas flow measuring device, which is used to measure the gas flow of the gas pipeline to be measured.

[0012] Preferably, in the humidifying gas flow measurement device of the present invention, the temperature and humidity measurement unit is implemented by a detector that simultaneously measures temperature and humidity, or by a temperature measuring instrument and a humidity measuring instrument respectively.

[0013] To achieve its technical objective, this invention also provides a humidifying gas flow measurement method, comprising the following steps:

[0014] The gas in the gas pipeline is humidified with water by a humidifier connected to the side of the gas pipeline;

[0015] Two sets of temperature and humidity measurement units were used to measure the dry bulb temperature and relative humidity of the gas to be tested before and after humidification by the humidifier. The dry bulb temperature and relative humidity of the gas to be tested before humidification by the humidifier were T1 and φ1, respectively, and the dry bulb temperature and relative humidity of the gas to be tested after humidification by the humidifier were T2 and φ2, respectively. The humidification amount of the humidifier was G.

[0016] The flow rate Q of the gas to be measured is calculated using the following formula:

[0017] Q = G / (d2-d1);

[0018] Where d1 and d2 represent the moisture content of the gas being tested before and after humidification by the humidifier, respectively. , , , , and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T1 and relative humidity φ1, respectively. and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T2 and relative humidity φ2, respectively. , The dry-bulb temperature is in degrees Celsius, the moisture content and humidification are in grams, and the saturated water vapor pressure is in Pascals.

[0019] Preferably, in the humidifying gas flow measurement of the present invention, the side of the gas pipe is provided with multiple mounting holes, which are respectively used to connect the output end of the humidifier and the temperature and humidity measuring unit. The connection and mounting parts are sealed, and the measuring probes of the two sets of temperature and humidity measuring units extend into the gas pipe.

[0020] Preferably, in the humidifying gas flow measurement of the present invention, the humidifier, two sets of temperature and humidity measurement units, the processing unit, and the gas pipeline together constitute the humidifying gas flow measurement device, and one end of the gas pipeline is used to connect to the input pipeline of the gas to be measured.

[0021] Preferably, in the humidifying gas flow measurement of the present invention, the humidifier, the temperature and humidity measuring unit, and the processing unit together constitute the humidifying gas flow measurement device, which is used to measure the gas flow of the gas pipeline to be measured.

[0022] Preferably, in the humidifying gas flow measurement of the present invention, the temperature and humidity measurement unit is implemented by a detector that simultaneously measures temperature and humidity, or by a temperature measuring instrument and a humidity measuring instrument respectively.

[0023] Compared with the prior art, the beneficial effects of the present invention include: the present invention places the measuring probes of two sets of temperature and humidity measuring units in the gas pipeline, and their surfaces exchange with the air. The measuring units monitor the temperature and humidity parameters of the gas exchange and calculate the gas flow rate of the pipeline. The method is simple and highly accurate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the first embodiment of the humidifying gas flow measurement device of the present invention;

[0025] Figure 2 This is a schematic diagram of the first embodiment of the humidifying gas flow measurement device of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] refer to Figure 1 The air flow meter provided in this embodiment is a humidifying gas flow measurement device, including a humidifier 4, temperature and humidity measurement units 2 and 5, and a processing unit 3. The humidifier 4, temperature and humidity measurement units 2 and 5, and processing unit 3 together constitute the humidifying gas flow measurement device, which is used to measure the gas flow of the gas pipeline 1 to be measured.

[0028] The side of the gas pipe 1 has multiple mounting holes for connecting the output end of the humidifier 4 and the temperature and humidity measuring units 2 and 5, respectively. The connection and mounting parts are sealed, and the measuring probes of the two sets of temperature and humidity measuring units 2 and 5 extend into the gas pipe 1.

[0029] The output of humidifier 4 is connected to the side of a gas pipe 1, which is used to circulate the gas to be tested. The airflow direction is shown by the arrow in the figure. The water vapor output by the humidifier humidifies the gas to be tested before humidifier 4. Two sets of temperature and humidity measurement units 2 and 5 are used to measure the dry-bulb temperature and relative humidity of the gas to be tested before and after humidification by humidifier 4. The dry-bulb temperature and relative humidity of the gas to be tested before humidification by humidifier 4 measured by temperature and humidity measurement unit 2 are T1 and φ1, respectively. The dry-bulb temperature and relative humidity of the gas to be tested after humidification by humidifier 4 measured by temperature and humidity measurement unit 5 are T2 and φ2, respectively. The humidification amount is G. The dry-bulb temperature is the actual temperature of the air at the surface contacted by the probe when measuring air humidity. Relative humidity is the humidity relative to the air. Relative humidity plays an important role in the monitoring and forecasting of fine particulate matter. The humidification amount is the amount of water absorbed by the gas to be tested.

[0030] Processing unit 3 is used to calculate the flow rate Q of the gas to be measured. The calculation formula is as follows:

[0031] Q = G / (d2-d1);

[0032] Where d1 and d2 represent the moisture content of the gas being tested before and after humidification by the humidifier, respectively. , , , , and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T1 and relative humidity φ1, respectively. and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T2 and relative humidity φ2, respectively. , The dry-bulb temperature is in degrees Celsius, the moisture content and humidification are in grams, and the saturated water vapor pressure is in Pascals.

[0033] In this embodiment, the humidifier 4, temperature and humidity measuring units 2 and 5, and processing unit 3 are used together as monitoring components. A hole is made in the surface of the gas pipe to be measured, and the probes of the temperature and humidity measuring units 2 and 5 are inserted into the gas pipe. The humidifier 4 is then connected to the gas pipe. This implementation method is highly operable and more suitable for flexible use in different environments according to actual conditions.

[0034] The humidifying gas flow measurement method corresponding to this embodiment includes the following steps:

[0035] The gas in the gas pipeline is humidified with water by a humidifier connected to the side of the gas pipeline;

[0036] The dry bulb temperature and relative humidity of the gas to be tested before and after humidification by the humidifier are measured using two sets of temperature and humidity measurement units.

[0037] The flow rate Q of the gas to be measured is calculated using the following formula:

[0038] Q = G / (d2-d1).

[0039] The definitions and calculation methods of each parameter in the measurement method can be found in the above-mentioned measuring device, and will not be repeated here.

[0040] refer to Figure 2 The air flow meter provided in this embodiment is a humidifying gas flow measurement device, including a humidifier 4, temperature and humidity measurement units 2 and 5, a processing unit 3, and a gas pipeline 1. The gas pipeline 1, humidifier 4, temperature and humidity measurement units 2 and 5, and processing unit 3 together constitute the humidifying gas flow measurement device, used to measure the flow rate of the gas to be measured. In use, flanges 6 and 7 connect both ends of the gas pipeline 1 to the pipeline being measured. Figure 2 The pipes being measured are located on the left side of flange 6 and the right side of flange 7.

[0041] The side of the gas pipe 1 has multiple mounting holes for connecting the output end of the humidifier 4 and the temperature and humidity measuring units 2 and 5, respectively. The connection and mounting parts are sealed, and the measuring probes of the two sets of temperature and humidity measuring units 2 and 5 extend into the gas pipe 1.

[0042] The output of humidifier 4 is connected to the side of a gas pipe 1, which is used to circulate the gas to be measured flowing from the pipe being measured. The airflow direction is shown by the arrow in the figure. The water vapor output by the humidifier humidifies the gas to be measured before humidifier 4. Two sets of temperature and humidity measurement units 2 and 5 are used to measure the dry-bulb temperature and relative humidity of the gas to be measured before and after humidification by humidifier 4. The dry-bulb temperature and relative humidity of the gas to be measured before humidification by humidifier 4 are T1 and φ1, respectively, as measured by temperature and humidity measurement unit 2. The dry-bulb temperature and relative humidity of the gas to be measured after humidification by humidifier 4 are T2 and φ2, respectively, as measured by temperature and humidity measurement unit 5. The humidification amount is G. The dry-bulb temperature is the actual temperature of the air at the surface contacted by the measuring probe when measuring air humidity. Relative humidity is the humidity relative to the air. Relative humidity plays an important role in the monitoring and forecasting of fine particulate matter. The humidification amount is the amount of water absorbed by the gas to be measured.

[0043] Processing unit 3 is used to calculate the flow rate Q of the gas to be measured. The calculation formula is as follows:

[0044] Q = G / (d2-d1);

[0045] Where d1 and d2 represent the moisture content of the gas being tested before and after humidification by the humidifier, respectively. , , , , and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T1 and relative humidity φ1, respectively. and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T2 and relative humidity φ2, respectively. , The dry-bulb temperature is in degrees Celsius, the moisture content and humidification are in grams, and the saturated water vapor pressure is in Pascals.

[0046] In this embodiment, the humidifier 4, temperature and humidity measuring units 2 and 5, processing unit 3, and gas pipeline 1 are used together as a measuring device, with the gas pipeline 1 of the measuring device connected to the pipeline under test. This implementation method directly connects the pipeline under test and the gas pipeline 1 through flanges 6 and 7, which is convenient for installation and can reduce errors generated during implementation.

[0047] The humidifying gas flow measurement method corresponding to this embodiment includes the following steps:

[0048] The gas in the gas pipeline is humidified with water by a humidifier connected to the side of the gas pipeline;

[0049] The dry bulb temperature and relative humidity of the gas to be tested before and after humidification by the humidifier are measured using two sets of temperature and humidity measurement units.

[0050] The flow rate Q of the gas to be measured is calculated using the following formula:

[0051] Q = G / (d2-d1).

[0052] The definitions and calculation methods of each parameter in the measurement method can be found in the above-mentioned measuring device, and will not be repeated here.

[0053] In the above embodiments, the temperature and humidity measurement unit is implemented using a detector that can measure both temperature and humidity. Therefore, only three holes are opened on the gas pipeline. In other embodiments of the present invention, temperature measurement and humidity measurement can be implemented using different instruments, in which case more holes need to be opened on the gas pipeline.

[0054] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A humidifying gas flow measurement device, characterized in that, include: A humidifier, the output end of which is connected to the side of a gas pipe for circulating the gas to be tested; Two sets of temperature and humidity measurement units are used to measure the dry-bulb temperature and relative humidity of the gas to be tested before and after humidification by the humidifier; the dry-bulb temperature and relative humidity of the gas to be tested before humidification by the humidifier are denoted as T1 and φ1, respectively, and the dry-bulb temperature and relative humidity of the gas to be tested after humidification by the humidifier are denoted as T2 and φ2, respectively, and the humidification amount of the humidifier is denoted as G. The processing unit is used to calculate the flow rate Q of the gas to be measured, using the following formula: Q = G / (d2-d1); Where d1 and d2 represent the moisture content of the gas being tested before and after humidification by the humidifier, respectively. , , , , and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T1 and relative humidity φ1, respectively. and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T2 and relative humidity φ2, respectively. , The dry-bulb temperature is in degrees Celsius, the moisture content and humidification are in grams, and the saturated water vapor pressure is in Pascals.

2. The humidifying gas flow measurement device according to claim 1, characterized in that, The gas pipe has multiple mounting holes on its side, which are used to connect the output end of the humidifier and the temperature and humidity measuring unit, respectively. The connection and mounting parts are sealed, and the measuring probes of the two sets of temperature and humidity measuring units extend into the gas pipe.

3. The humidifying gas flow measurement device according to claim 1, characterized in that, The humidifier, two sets of temperature and humidity measurement units, the processing unit, and the gas pipeline together constitute the humidifying gas flow measurement device, and one end of the gas pipeline is used to connect to the input pipeline of the gas to be measured.

4. The humidifying gas flow measuring device according to claim 1, characterized in that, The humidifier, temperature and humidity measurement unit, and processing unit together constitute the humidifying gas flow measurement device, which is used to measure the gas flow of the gas pipeline to be measured.

5. The humidifying gas flow measuring device according to claim 1, characterized in that, The temperature and humidity measurement unit is implemented using a detector that can measure both temperature and humidity simultaneously, or using a temperature detector and a humidity detector separately.

6. A method for measuring the flow rate of a humidifying gas, characterized in that, It includes the following steps: The gas in the gas pipeline is humidified with water by a humidifier connected to the side of the gas pipeline; Two sets of temperature and humidity measurement units were used to measure the dry bulb temperature and relative humidity of the gas to be tested before and after humidification by the humidifier. The dry bulb temperature and relative humidity of the gas to be tested before humidification by the humidifier were T1 and φ1, respectively, and the dry bulb temperature and relative humidity of the gas to be tested after humidification by the humidifier were T2 and φ2, respectively. The humidification amount of the humidifier was G. The flow rate Q of the gas to be measured is calculated using the following formula: Q = G / (d2-d1); Where d1 and d2 represent the moisture content of the gas being tested before and after humidification by the humidifier, respectively. , , , , and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T1 and relative humidity φ1, respectively. and These represent the saturated water vapor pressure and actual water vapor pressure corresponding to the dry-bulb temperature T2 and relative humidity φ2, respectively. , The dry-bulb temperature is in degrees Celsius, the moisture content and humidification are in grams, and the saturated water vapor pressure is in Pascals.

7. The humidifying gas flow measurement method according to claim 6, characterized in that, The gas pipe has multiple mounting holes on its side, which are used to connect the output end of the humidifier and the temperature and humidity measuring unit, respectively. The connection and mounting parts are sealed, and the measuring probes of the two sets of temperature and humidity measuring units extend into the gas pipe.

8. The humidifying gas flow measurement method according to claim 6, characterized in that, The humidifier, two sets of temperature and humidity measurement units, the processing unit, and the gas pipeline together constitute the humidifying gas flow measurement device. One end of the gas pipeline is used to connect to the input pipeline of the gas to be measured.

9. The humidifying gas flow measurement method according to claim 6, characterized in that, The humidifier, temperature and humidity measurement unit, and processing unit together constitute the humidifying gas flow measurement device, which is used to measure the gas flow of the gas pipeline to be measured.

10. The humidifying gas flow measurement method according to claim 6, characterized in that, The temperature and humidity measurement unit is implemented using a detector that can measure both temperature and humidity simultaneously, or using a temperature detector and a humidity detector separately.

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