A flue gas humidity meter for flue gas emission monitoring system

Abstract

The present invention relates to the technical field of flue gas monitoring, and in particular to a flue gas humidity meter for a flue gas emission monitoring system. It specifically discloses: a detection unit for monitoring flue gas humidity; a detection unit connected to the detection unit to allow flue gas to enter the detection unit; an air inlet connected to the detection unit; a concentration detector arranged at the air inlet, and the concentration detector is used to detect the flue gas concentration value outside the detection unit; the detection unit includes: a first connecting pipe, one end of which is connected to the detection unit and the other end is connected to the air inlet; a first filter module is arranged in the first connecting pipe; a second filter module is arranged in the first connecting pipe; a third filter module is arranged in the first connecting pipe; a first channel is connected to the first connecting pipe, and a second channel is connected to the second connecting pipe. Maintaining a constant speed of the detected flue gas makes the flow field in the flue tend to be stable, avoiding the impact of the flue gas, and ensuring the precision and accuracy of the flue gas humidity detection.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas monitoring, and in particular to a flue gas humidity meter for a flue gas emission monitoring system. Background Art

[0002] An important aspect of current environmental protection work is to monitor toxic and harmful gases in flue gas, and the continuous online monitoring system (CEMS) for flue gas has also emerged. CEMS mainly quantifies pollutants in flue gas based on dry flue gas conditions, but industrial flue gas is not ideal dry flue gas and always contains a certain amount of moisture. Therefore, the moisture content of flue gas has become a must-measure factor in the monitoring of flue gas pollution sources. The accuracy of its measurement is directly related to the total amount of pollutant emissions, concentration calculation and the evaluation of the efficiency of the flue gas purification system, which has a great impact on the flue gas treatment system.

[0003] Flue gas moisture content is also the humidity of flue gas, including two expressions: absolute humidity and relative humidity. The absolute humidity of flue gas refers to the ratio of the mass of water vapor contained in the flue gas to the mass of adiabatic dry flue gas. The relative humidity RH of flue gas is defined as the percentage of the humidity of flue gas to the humidity of saturated wet flue gas at the same temperature. The sources of moisture in flue gas include the following: first, the water vapor formed by the evaporation of water brought by the fuel in the form of bound water or external water during the combustion of the fuel; second, the moisture carried by the air blown into the boiler during combustion; third, the water generated by the oxidation of hydrocarbons contained in the fuel during combustion.

[0004] Humidity is a must-measure parameter for flue gas and is involved in the calculation of total emissions. Therefore, how to overcome high temperature, high humidity, high dust and acidic substance contamination to ensure accurate online measurement of flue gas humidity is an urgent problem to be solved. Summary of the invention

[0005] The purpose of the present invention is to realize the online accurate measurement of the flue gas humidity in the flue gas emission monitoring system. The present application provides a flue gas humidity meter for the flue gas emission monitoring system.

[0006] In some embodiments of the present application, a concentration detector, a power component and a processing module are additionally provided. The real-time power component operating speed is set according to the real-time external concentration value detected by the concentration detector, and the constant speed of the flue gas detection is maintained, so that the flow field in the flue tends to be stable, avoiding the impact of the flue gas and ensuring the precision and accuracy of the flue gas humidity detection.

[0007] In some embodiments of the present application, a first filter module, a second filter module, a third filter module, a first channel and a second channel are additionally provided, and the smoke flow channel is adjusted according to the smoke concentration to achieve graded filtration of smoke of different concentrations, reduce fine particles in the smoke, and improve test accuracy.

[0008] In some embodiments of the present application, by adding a temperature sensor and a heater, the temperature inside the detection unit can be kept constant, water vapor can be prevented from condensing on the surface of the humidity sensor, the detection accuracy can be improved, and the service life of the instrument can be extended.

[0009] In some embodiments of the present application, a flue gas humidity meter for a flue gas emission monitoring system is provided, comprising:

[0010] Detection unit, used to monitor smoke humidity;

[0011] A detection part connected to the detection part to allow smoke to enter the detection part;

[0012] An air inlet connected to the detection part;

[0013] A concentration detector is arranged at the air inlet, and is used to detect the smoke concentration value outside the detection part;

[0014] The detection unit comprises:

[0015] A first connecting pipe, one end of which is connected to the detection unit, and the other end of which is connected to the air inlet;

[0016] A first filter module is disposed in the first connecting pipe;

[0017] A second filter module is disposed in the first connecting pipe;

[0018] A third filter module is disposed in the first connecting pipe;

[0019] a first channel connected to the first connecting pipe, wherein one end of the first channel is disposed at the air inlet, and the other end of the first channel is disposed between the second filter module and the first filter module;

[0020] The second channel is connected to the second connecting pipe, one end of the second channel is arranged at the air inlet, and the other end is arranged between the second filter module and the third filter module.

[0021] In some embodiments of the present application, the detection unit includes:

[0022] case;

[0023] A first through hole is provided on the housing, and the first connecting pipe is connected to the first through hole;

[0024] A humidity sensor is disposed in the housing and is used to detect the humidity of external smoke;

[0025] A power component is arranged in the shell and is used to control the flow speed of smoke in the first connecting pipe.

[0026] In some embodiments of the present application, the detection unit further includes:

[0027] The processing module is arranged inside the shell and connected to the power component through a wire; the processing module is also connected to the concentration detector through a wire.

[0028] In some embodiments of the present application, the detection unit further includes:

[0029] The display module is arranged on the housing and connected to the humidity sensor through a wire. The display module is used to display the real-time smoke humidity value.

[0030] In some embodiments of the present application, the detection unit further includes:

[0031] A temperature sensor is disposed in the housing and connected to the processing module via a wire, and is used to collect a temperature value in the detection unit;

[0032] A heater is disposed in the housing and connected to the processing module via a wire. The heater is used to control the block to control the temperature in the detection unit.

[0033] In some embodiments of the present application, the processing module is used to:

[0034] A first temperature value and a second temperature value are preset, and when the real-time temperature in the detection part collected by the temperature sensor is less than the first temperature value, the processing module starts the heater;

[0035] When the real-time temperature in the detection part collected by the temperature sensor is greater than a second temperature value, the processing module turns off the heater;

[0036] In some embodiments of the present application, the detection unit further includes:

[0037] a first valve, disposed in the first channel, the first valve being used to control the smoke flow in the first channel, and when the first valve is closed, the smoke flow in the first channel is zero;

[0038] a second valve, disposed in the second channel, the second valve being used to control the smoke flow in the second channel, and when the second valve is closed, the smoke flow in the second channel is zero;

[0039] The third valve is arranged in the first connecting pipe, and the third valve is used to control the smoke flow rate flowing through the third filter module. When the third valve is closed, the smoke flow rate flowing through the third filter module is zero.

[0040] In some embodiments of the present application, the processing module is used to:

[0041] Preset an external flue gas concentration matrix A, and set A(A1, A2, A3, A4), where A1 is the first preset value of the external flue gas concentration, A2 is the second preset value of the external flue gas concentration, A3 is the third preset value of the external flue gas concentration, A4 is the fourth preset value of the external flue gas concentration, and A1 < A2 < A3 < A4;

[0042] Preset a power component working speed matrix B, and set B(B1, B2, B3, B4), where B1 is the first preset value of the power component working speed, B2 is the second preset value of the power component working speed, B1 is the third preset value of the power component working speed, B1 is the fourth preset value of the power component working speed, and B1 < B2 < B3 < B4;

[0043] The processing module sets a real-time power component working speed b according to the real-time external concentration value a detected by the concentration detector, specifically:

[0044] When the real-time external concentration value a detected by the concentration detector is greater than the fourth preset value A4 of the external flue gas concentration, that is, a > A4, set the real-time power component working speed b to be less than the first preset value B1 of the power component working speed, that is, b < B1;

[0045] When the real-time external concentration value a detected by the concentration detector is between the third preset value A3 and the fourth preset value A4 of the external flue gas concentration, that is, A3 < a < A4, set the real-time power component working speed b to be between the first preset value B1 and the second preset value B2 of the power component working speed, that is, B1 < b < B2;

[0046] When the real-time external concentration value a detected by the concentration detector is between the second preset value A2 and the third preset value A3 of the external flue gas concentration, that is, A2 < a < A3, set the real-time power component working speed b to be between the second preset value B2 and the third preset value B3 of the power component working speed, that is, B2 < b < B3;

[0047] When the real-time external concentration value a detected by the concentration detector is between the first preset value A3 and the second preset value A4 of the external flue gas concentration, that is, A3 < a < A4, set the real-time power component working speed b to be between the third preset value B3 and the fourth preset value B4 of the power component working speed, that is, B3 < b < B4.

[0048] In some embodiments of the present application, the processing module is further configured to:

[0049] Set the start and stop of the first valve, the second valve, and the third valve according to the real-time external concentration value a detected by the concentration detector, specifically as follows:

[0050] When the real-time external concentration value a detected by the concentration detector is greater than the fourth preset value of external flue gas concentration A4, i.e., a > A4, it is set that the third valve is opened, and the first valve and the second valve are closed;

[0051] When the real-time external concentration value a detected by the concentration detector is between the second preset value of external flue gas concentration A2 and the fourth preset value of external flue gas concentration A4, i.e., A2 < a < A4, it is set that the second valve is opened, and the first valve and the third valve are closed;

[0052] When the real-time external concentration value a detected by the concentration detector is less than the second preset value of external flue gas concentration A2, i.e., a < A2, it is set that the first valve is opened, and the second valve and the third valve are closed.

[0053] In some embodiments of the present application, it further includes:

[0054] A mounting plate, connected to the detection part, and mounting holes are provided on the mounting plate.

[0055] Compared with the prior art, the flue gas humidity meter for a flue gas emission monitoring system in an embodiment of the present invention has the following beneficial effects:

[0056] The working speed of the real-time power part can be set according to the real-time external concentration value detected by the concentration detector, so as to keep the detection speed of the flue gas constant, make the flow field in the flue duct tend to be stable, avoid the impact of the flue gas, and ensure the accuracy and precision of the flue gas humidity detection.

[0057] The flue gas flow channel is adjusted according to the flue gas concentration, so as to realize the hierarchical filtration of flue gas with different concentrations, reduce the fine particles in the flue gas, and improve the test precision.

[0058] The temperature in the detection part can be kept constant, preventing water vapor from condensing on the surface of the humidity sensor, improving the detection precision, and prolonging the service life of the instrument. Description of the Drawings

[0059] Figure 1 is a schematic structural diagram of a flue gas humidity meter for a flue gas emission monitoring system in an embodiment of the present application;

[0060] Figure 2 is a schematic structural diagram of the detection part of a flue gas humidity meter for a flue gas emission monitoring system in an embodiment of the present application;

[0061] Figure 3 is a schematic structural diagram of the detection part of a flue gas humidity meter for a flue gas emission monitoring system in an embodiment of the present application.

[0062] In the figure, 100 is a detection unit; 101 is a display module; 102 is a humidity sensor; 103 is a temperature sensor; 104 is a heater; 105 is a power part; 106 is a processing module; 107 is a housing; 200 is a detection unit; 201 is a first connecting pipe; 202 is a first filter module; 203 is a second filter module; 204 is a third filter module; 205 is a first valve; 206 is a second valve; 207 is a third valve; 208 is a first channel; 209 is a second channel; 300 is a mounting plate; 301 is a mounting hole; 400 is an air inlet; 500 is a concentration detector. DETAILED DESCRIPTION

[0063] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0064] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0065] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0066] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] like Figure 1 , Figure 2 and Figure 3 As shown, a flue gas humidity meter for a flue gas emission monitoring system according to a preferred embodiment of the present invention comprises:

[0068] The detection unit 100 is used to monitor the humidity of the smoke;

[0069] The detection unit 200 is connected to the detection unit 100 to allow smoke to enter the detection unit 100;

[0070] The air inlet 400 is connected to the detection unit 200;

[0071] A concentration detector is disposed at the air inlet 400 and is used to detect the smoke concentration value outside the detection unit 200;

[0072] The detection unit 200 includes:

[0073] A first connecting pipe 201, one end of which is connected to the detection unit 100, and the other end of which is connected to the air inlet 400;

[0074] The first filter module 202 is disposed in the first connecting pipe 201;

[0075] The second filter module 203 is disposed in the first connecting pipe 201;

[0076] The third filter module 204 is disposed in the first connecting pipe 201;

[0077] A first channel 208 is connected to the first connecting pipe 201 , one end of the first channel 208 is disposed at the air inlet 400 , and the other end is disposed between the second filter module 203 and the first filter module 202 ;

[0078] The second channel 209 is connected to the second connecting pipe. One end of the second channel 209 is disposed at the air inlet 400 , and the other end is disposed between the second filter module 203 and the third filter module 204 .

[0079] Specifically, the first filter module 202, the second filter module 203, and the third filter module 204 all play the role of filtering fine particles in the smoke. The smoke flow channel is adjusted according to the smoke concentration to achieve graded filtration of smoke of different concentrations, reduce fine particles in the smoke, and improve test accuracy.

[0080] In some preferred embodiments of the present application, the detection unit 100 includes:

[0081] Housing 107;

[0082] A first through hole is provided on the housing 107, and a first connecting pipe 201 is connected to the first through hole;

[0083] The humidity sensor 102 is disposed in the housing 107 and is used to detect the humidity of the external smoke;

[0084] The power member 105 is disposed in the housing 107 and is used to control the flow speed of the smoke in the first connecting pipe 201 .

[0085] Specifically, the humidity sensor 102 uses a polymer film humidity-sensitive capacitor. When the ambient humidity changes, the dielectric constant of the humidity-sensitive capacitor changes, causing its capacitance to change as well. The change in capacitance is proportional to the relative humidity. When water vapor in the flue gas comes into contact with the humidity-sensitive capacitor, the dielectric constant of the humidity-sensitive capacitor changes, causing its capacitance to change as well. The signal is output through a signal wire, thus achieving online monitoring.

[0086] In some preferred embodiments of the present application, the detection unit 100 further includes:

[0087] The processing module 106 is disposed inside the housing 107 and connected to the power component through a wire; the processing module 106 is also connected to the concentration detector through a wire.

[0088] The display module 101 is disposed on the housing 107 and connected to the humidity sensor 102 via a wire. The display module 101 is used to display the real-time smoke humidity value.

[0089] Specifically, the display module 101 is a screen, which is disposed on the housing 107 of the detection unit 100 and displays the humidity value of the detected smoke in real time according to the detection result of the humidity sensor 102 for easy inspection.

[0090] The temperature sensor 103 is disposed in the housing 107 and connected to the processing module 106 via a wire. The temperature sensor 103 is used to collect the temperature value in the detection unit 100;

[0091] The heater 104 is disposed in the housing and connected to the processing module 106 via a wire. The heater 104 is used to control the temperature in the detection unit 100 .

[0092] A first temperature value and a second temperature value are preset, and when the real-time temperature in the detection unit 100 collected by the temperature sensor 103 is less than the first temperature value, the processing module 106 starts the heater 104;

[0093] When the real-time temperature in the detection portion 100 acquired by the temperature sensor 103 is greater than the second temperature value, the processing module 106 turns off the heater 104 .

[0094] Specifically, the preset first temperature value is lower than the second temperature value, and the temperature value inside the detection unit 100 is monitored in real time through the temperature sensor 103. When the temperature is lower than the first preset value, the heater 104 works to increase the temperature inside the detection unit 100. When the real-time temperature inside the detection unit 100 is higher than the second temperature value, the heater 104 stops working to ensure that the temperature around the humidity sensor 102 remains constant. This effectively avoids the fluctuation of humidity caused by changes in ambient temperature.

[0095] In some preferred embodiments of the present application, the detection unit 200 further includes:

[0096] The first valve 205 is disposed in the first channel 208. The first valve 205 is used to control the smoke flow in the first channel 208. When the first valve 205 is closed, the smoke flow in the first channel 208 is zero;

[0097] The second valve 206 is disposed in the second channel 209. The second valve 206 is used to control the smoke flow in the second channel 209. When the second valve 206 is closed, the smoke flow in the second channel 209 is zero;

[0098] The third valve 207 is disposed in the first connecting pipe 201 and is used to control the smoke flow rate flowing through the third filter module 204. When the third valve 207 is closed, the smoke flow rate flowing through the third filter module is zero.

[0099] Specifically, the processing module 106 is connected to the first valve 205, the second valve 206, and the third valve 207, and the start and stop of the first valve 205, the second valve 206, and the third valve 207 are set according to the real-time external concentration value detected by the concentration detector.

[0100] When the third valve 207 is set to be opened and the first valve 205 and the second valve 206 are closed, the smoke needs to pass through the first filter module 202 , the second filter module 203 and the third filter module 204 before entering the detection unit 100 .

[0101] When the second valve 206 is set to be open and the first valve 205 and the third valve 207 are closed, the smoke needs to pass through the first filter module 202 and the second filter module 203 before entering the detection unit 100 .

[0102] When the first valve 205 is set to be open, the second valve 206 is closed, and the third valve 207 is closed, the smoke passes through the first filtering module 202 and enters the detection unit 100, thereby achieving graded filtering of smoke of different concentrations.

[0103] In some preferred embodiments of the present application, the processing module is used to:

[0104] The external smoke concentration matrix A is preset, and A(A1, A2, A3, A4) is set, where A1 is the first external smoke concentration preset value, A2 is the second external smoke concentration preset value, A3 is the third external smoke concentration preset value, A4 is the fourth external smoke concentration preset value, and A1 <A2<A3<A4;

[0105] Preset the working speed matrix B of the power components, and set B(B1, B2, B3, B4), where B1 is the preset value of the working speed of the first power component, B2 is the preset value of the working speed of the second power component, B1 is the preset value of the working speed of the third power component, B1 is the preset value of the working speed of the fourth power component, and B1 < B2 < B3 < B4;

[0106] The processing module sets the real-time working speed b of the power components according to the real-time external concentration value a detected by the concentration detector, specifically as follows:

[0107] When the real-time external concentration value a detected by the concentration detector is greater than the fourth preset value A4 of the external flue gas concentration, that is, a > A4, set the real-time working speed b of the power components to be less than the preset value B1 of the working speed of the first power component, that is, b < B1;

[0108] When the real-time external concentration value a detected by the concentration detector is between the third preset value A3 and the fourth preset value A4 of the external flue gas concentration, that is, A3 < a < A4, set the real-time working speed b of the power components to be between the preset value B1 of the working speed of the first power component and the preset value B2 of the working speed of the second power component, that is, B1 < b < B2;

[0109] When the real-time external concentration value a detected by the concentration detector is between the second preset value A2 and the third preset value A3 of the external flue gas concentration, that is, A2 < a < A3, set the real-time working speed b of the power components to be between the preset value B2 of the working speed of the second power component and the preset value B3 of the working speed of the third power component, that is, B2 < b < B3;

[0110] When the real-time external concentration value a detected by the concentration detector is between the first preset value A3 and the second preset value A4 of the external flue gas concentration, that is, A3 < a < A4, set the real-time working speed b of the power components to be between the preset value B3 of the working speed of the third power component and the preset value B4 of the working speed of the fourth power component, that is, B3 < b < B4.

[0111] It can be understood that in the above embodiments, according to the real-time external concentration value detected by the concentration detector, the real-time working speed of the power components is set to maintain a constant speed of the detected flue gas, making the flow field in the flue duct tend to be stable, avoiding the impact of the flue gas, and ensuring the accuracy and precision of the flue gas humidity detection.

[0112] In some preferred embodiments of the present application, the processing module is further configured to:

[0113] Set the start and stop of the first valve 205, the second valve 206, and the third valve 207 according to the real-time external concentration value a detected by the concentration detector, specifically as follows:

[0114] When the real-time external concentration value a detected by the concentration detector is greater than the fourth preset external flue gas concentration value A4, i.e., a > A4, it is set that the third valve 207 is opened, and the first valve 205 and the second valve 206 are closed;

[0115] When the real-time external concentration value a detected by the concentration detector is between the second preset external flue gas concentration value A2 and the fourth preset external flue gas concentration value A4, i.e., A2 < a < A4, it is set that the second valve 206 is opened, and the first valve 205 and the third valve 207 are closed;

[0116] When the real-time external concentration value a detected by the concentration detector is less than the second preset external flue gas concentration value A2, i.e., a < A2, it is set that the first valve 205 is opened, and the second valve 206 and the third valve 207 are closed.

[0117] It can be understood that in the above embodiments, by adjusting the flue gas flow channel according to the flue gas concentration, hierarchical filtration of flue gas with different concentrations is achieved, fine particles in the flue gas are reduced, and the test accuracy is improved.

[0118] In some preferred embodiments of the present application, it further includes:

[0119] The mounting plate 300 is connected to the detection unit 100, and mounting holes 301 are provided on the mounting plate 300.

[0120] According to the first concept of the present application, the power component and the processing module set the real-time working speed of the power component according to the real-time external concentration value detected by the concentration detector, maintain a constant speed of the detected flue gas, make the flow field in the flue duct tend to be stable, avoid the impact of the flue gas, and ensure the accuracy and reliability of the flue gas humidity detection.

[0121] According to the second concept of the present application, a first filtration module, a second filtration module, a third filtration module, a first channel and a second channel are added, and the flue gas flow channel is adjusted according to the flue gas concentration to achieve hierarchical filtration of flue gas with different concentrations, reduce fine particles in the flue gas, and improve the test accuracy.

[0122] According to the third concept of the present application, by adding a temperature sensor and a heater, the temperature in the detection unit can be kept constant, preventing water vapor from condensing on the surface of the humidity sensor, improving the detection accuracy, and prolonging the service life of the instrument.

[0123] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A flue gas humidity meter for a flue gas emission monitoring system, characterized in that: include: Detection unit, used to monitor smoke humidity; A detection part connected to the detection part to allow smoke to enter the detection part; An air inlet connected to the detection part; A concentration detector is arranged at the air inlet, and is used to detect the smoke concentration value outside the detection part; The detection unit comprises: A first connecting pipe, one end of which is connected to the detection unit, and the other end of which is connected to the air inlet; A first filter module is disposed in the first connecting pipe; A second filter module is disposed in the first connecting pipe; A third filter module is disposed in the first connecting pipe; a first channel connected to the first connecting pipe, wherein one end of the first channel is disposed at the air inlet, and the other end of the first channel is disposed between the second filter module and the first filter module; A second channel connected to the second connecting pipe, wherein one end of the second channel is disposed at the air inlet, and the other end of the second channel is disposed between the second filter module and the third filter module; The detection unit comprises: case; A first through hole is provided on the housing, and the first connecting pipe is connected to the first through hole; A humidity sensor is disposed in the housing and is used to detect the humidity of external smoke; A power member, disposed in the housing, for controlling the flow velocity of smoke in the first connecting pipe; The detection unit also includes: A processing module disposed inside the housing and connected to the power member via a wire; the processing module is also connected to the concentration detector via a wire; The detection unit also includes: a first valve, disposed in the first channel, the first valve being used to control the smoke flow in the first channel, and when the first valve is closed, the smoke flow in the first channel is zero; a second valve, disposed in the second channel, the second valve being used to control the smoke flow in the second channel, and when the second valve is closed, the smoke flow in the second channel is zero; A third valve is disposed in the first connecting pipe, the third valve is used to control the flue gas flow through the third filter module, when the third valve is closed, the flue gas flow through the third filter module is zero; The processing module is used for: The external smoke concentration matrix A is preset, and A(A1, A2, A3, A4) is set, where A1 is the first external smoke concentration preset value, A2 is the second external smoke concentration preset value, A3 is the third external smoke concentration preset value, A4 is the fourth external smoke concentration preset value, and A1 <A2<A3<A4; The preset power component working speed matrix B is set to B(B1, B2, B3, B4), where B1 is the preset value of the working speed of the first power component, B2 is the preset value of the working speed of the second power component, B1 is the preset value of the working speed of the third power component, B1 is the preset value of the working speed of the fourth power component, and B1 <B2<B3<B4; The processing module sets the real-time power component working speed b according to the real-time external concentration value a detected by the concentration detector, which is specifically: When the real-time external concentration value a detected by the concentration detector is greater than the fourth preset value A4 of the external flue gas concentration, that is, a > A4, the real-time operating speed b of the power component is set to be less than the first preset value B1 of the power component operating speed, that is, b < B1; When the real-time external concentration value a detected by the concentration detector is between the third preset value A3 and the fourth preset value A4 of the external flue gas concentration, that is, A3 < a < A4, the real-time operating speed b of the power component is set to be between the first preset value B1 and the second preset value B2 of the power component operating speed, that is, B1 < b < B2; When the real-time external concentration value a detected by the concentration detector is between the second preset value A2 and the third preset value A3 of the external flue gas concentration, that is, A2 < a < A3, the real-time operating speed b of the power component is set to be between the second preset value B2 and the third preset value B3 of the power component operating speed, that is, B2 < b < B3; When the real-time external concentration value a detected by the concentration detector is between the first preset value A3 and the second preset value A4 of the external flue gas concentration, that is, A3 < a < A4, the real-time operating speed b of the power component is set to be between the third preset value B3 and the fourth preset value B4 of the power component operating speed, that is, B3 < b < B4.

2. The flue gas humidity meter for a flue gas emission monitoring system according to claim 1, characterized in that: The detection unit further includes: A display module, arranged on the housing and connected to the humidity sensor through a wire, and the display module is used to display the real-time flue gas humidity value.

3. The flue gas humidity meter for a flue gas emission monitoring system according to claim 2, characterized in that: The detection unit further includes: A temperature sensor, arranged inside the housing and connected to the processing module through a wire, and the temperature sensor is used to collect the temperature value inside the detection unit; A heater, arranged inside the housing and connected to the processing module through a wire, and the heater is used to control the temperature inside the block for controlling the detection unit.

4. The flue gas humidity meter for a flue gas emission monitoring system according to claim 3, characterized in that: The processing module is used for: Presetting a first temperature value and a second temperature value. When the real-time temperature inside the detection unit collected by the temperature sensor is less than the first temperature value, the processing module starts the heater; When the real-time temperature inside the detection unit collected by the temperature sensor is greater than the second temperature value, the processing module turns off the heater.

5. The flue gas humidity meter for a flue gas emission monitoring system according to claim 4, characterized in that: The processing module is further used for: According to the real-time external concentration value a detected by the concentration detector, setting the start and stop of the first valve, the second valve, and the third valve, specifically as follows: When the real-time external concentration value a detected by the concentration detector is greater than the fourth preset value A4 of the external flue gas concentration, that is, a > A4, the third valve is set to be open, and the first valve and the second valve are closed; When the real-time external concentration value a detected by the concentration detector is between the second preset value A2 and the fourth preset value A4 of the external flue gas concentration, that is, A2 < a < A4, the second valve is set to be open, and the first valve and the third valve are closed; When the real-time external concentration value a detected by the concentration detector is less than the second preset value A2 of the external flue gas concentration, that is, a < A2, the first valve is set to be open, and the second valve and the third valve are closed.

6. The flue gas humidity meter for a flue gas emission monitoring system according to any one of claims 1 to 5, characterized in that: It further includes: The mounting plate is connected to the detection part, and the mounting plate is provided with a mounting hole.

Images