An on-line detection and alarm device for primary air ducts

Abstract

The present invention relates to the technical field of on-line detection equipment for primary air ducts, and specifically discloses an on-line detection and alarm device for primary air ducts, which specifically includes: a vibration mechanism is arranged inside the main body; an air flow hole is opened on the outer side wall of the main body; an air flow detection mechanism is arranged inside the main body opposite to the air flow detection hole; an alarm mechanism is arranged inside the main body, and a control mechanism is electrically connected to the air flow detection mechanism, the vibration mechanism, the primary air damper and the coal feeder. The alarm mechanism is used to give an alarm after the air flow detection mechanism detects abnormal gas flow in the primary air duct. By obtaining various data information of the air flow and pulverized coal in the primary air duct detected currently, it is judged whether a blockage occurs in the current primary air duct. If a blockage occurs, pre-treatment is carried out. If the blockage situation is not solved, an alarm message is sent to the operator, preventing the problems that in the traditional method, when the operator detects the primary air duct, the detection efficiency is reduced and it is easy to miss detection, which may further lead to the damage of the combustion furnace and cause casualties.

Description

Technical Field

[0001] The present invention relates to the technical field of on-line detection equipment for primary air ducts, and particularly to an on-line detection and alarm device for primary air ducts. Background Art

[0002] In a thermal power plant, the primary air duct, as a pipeline that provides pulverized coal drying medium and combustion air for the combustion furnace, is undoubtedly very important in the overall operation of the thermal power plant. During operation, the primary air duct may be blocked due to too small opening of the primary air damper, too low primary air pressure, excessive powder feeding amount of the feeder, or too wet pulverized coal, etc., which may further lead to damage of the combustion furnace and cause casualties. Therefore, the detection of the primary air duct is very important.

[0003] Currently, the detection of the primary air duct is often carried out by operators. When operators detect the blockage of the primary air duct for a long time, it is extremely easy to reduce the detection efficiency and miss detections, which is extremely likely to lead to damage of the combustion furnace and further cause casualties. Moreover, there are many combustion furnaces in thermal power plants, and multiple operators are required to conduct simultaneous detections, resulting in a relatively high personnel cost.

[0004] In view of this, there is an urgent need to invent a detection device to solve the problems of reduced detection efficiency and missed detections during the long-term detection of the primary air duct by traditional operators, and the relatively high personnel cost caused by the need for multiple operators to conduct simultaneous detections in thermal power plants. Summary of the Invention

[0005] The purpose of the present invention is to provide an on-line detection and alarm device for primary air ducts, aiming to prevent the problems of reduced detection efficiency and easy occurrence of missed detections during the detection of the primary air duct by traditional operators, which may further lead to damage of the combustion furnace and cause casualties.

[0006] To achieve the above purpose, the present invention provides an on-line detection and alarm device for primary air ducts, including:

[0007] A main body, which is arranged inside the primary air duct, is connected to the inside of the primary air duct, and is provided with a first cavity;

[0008] A vibration mechanism, which is arranged inside the first cavity, is connected to the inner bottom surface of the first cavity, and is used to vibrate the blocked pulverized coal in the primary air duct;

[0009] Air flow holes, which are opened on the outer side wall of the main body;

[0010] An air flow detection mechanism, which is disposed opposite to the air flow detection hole inside the first cavity, is connected to the inner bottom surface of the first cavity, and is used to detect the gas flowing through the air flow hole;

[0011] An alarm mechanism, which is disposed inside the first cavity, is electrically connected to the air flow detection mechanism, the vibration mechanism, the primary air damper, and the coal feeder, and is used to give an alarm after the air flow detection mechanism detects abnormal gas flow in the primary air duct.

[0012] Further, the air flow detection mechanism includes:

[0013] An air flow velocity detection module, which is disposed inside the first cavity, is connected to the inner bottom surface of the first cavity, and is used to detect the gas flow velocity in the primary air duct;

[0014] A temperature detection module, which is disposed inside the first cavity, is connected to the inner bottom surface of the first cavity, and is used to detect the gas temperature in the primary air duct;

[0015] A pressure detection module, which is disposed inside the first cavity, is connected to the inner bottom surface of the first cavity, and is used to detect the gas pressure in the primary air duct;

[0016] A humidity detection module, which is disposed inside the first cavity, is connected to the inner bottom surface of the first cavity, and is used to detect the dryness and humidity of the pulverized coal in the gas in the primary air duct;

[0017] A concentration detection module, which is disposed inside the first cavity, is connected to the inner bottom surface of the first cavity, and is used to detect the pulverized coal content in the gas in the primary air duct.

[0018] Further, the alarm device is also used to obtain the gas flow velocity data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas in the primary air duct according to the air flow velocity detection module, temperature detection module, pressure detection module, humidity detection module, and concentration detection module;

[0019] The alarm information is also used to adjust the vibration frequency of the vibration mechanism, the opening degree of the primary air damper, and the coal feeding amount of the coal feeder according to the gas flow velocity data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas;

[0020] The alarm information is also used to judge whether a blockage occurs in the primary air duct according to the gas flow rate data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas, where

[0021] if the alarm mechanism judges that a blockage occurs in the primary air duct, an alarm information is sent for notification.

[0022] Further, the alarm mechanism includes:

[0023] An acquisition module, electrically connected to the air flow velocity detection module, temperature detection module, pressure detection module, humidity detection module, and concentration detection module. The acquisition module is used to acquire the gas flow rate data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas in the primary air duct. The acquisition module is used to acquire the vibration frequency of the vibration mechanism and the coal feeding amount information of the coal feeder;

[0024] A communication module, provided with a 4G signal unit and a 5G signal unit. The communication module is used to send information;

[0025] A processing module, which adjusts the vibration frequency of the vibration mechanism and the coal feeding amount information of the coal feeder according to the gas flow rate data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas in the primary air duct. The processing module is also used to send an alarm information through the communication module when judging that a blockage occurs in the primary air duct;

[0026] A control module, which is used to control the vibration mechanism, primary air damper, and coal feeder.

[0027] Further, the processing module is also used to obtain the gas flow rate data information, obtain the real-time gas flow velocity △Q in the gas flow rate information. The processing module is also used to obtain the coal feeding amount △E of the current coal feeder. The processing module is also used to adjust the coal feeding amount △E of the current coal feeder according to the real-time gas flow velocity △Q;

[0028] The processing module is also used to set a first preset gas flow velocity Q1, a second preset gas flow velocity Q2, a third preset gas flow velocity Q3, and a fourth preset gas flow velocity Q4. The processing module is also used to set a first preset adjustment coefficient R1, a second preset adjustment coefficient R2, a third preset adjustment coefficient R3, and a fourth preset adjustment coefficient R4, and 1 > R1 > R2 > R3 > R4 > 0;

[0029] When the processing module adjusts the powder feeding amount △E of the current powder feeder according to the real-time gas flow rate △Q, it adjusts the powder feeding amount △E of the current powder feeder according to the relationship between the real-time gas flow rate △Q and each preset gas flow rate;

[0030] When △Q≥Q1, the powder feeding amount △E of the current powder feeder is not adjusted;

[0031] When Q1>△Q≥Q2, the first preset adjustment coefficient R1 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E*R1;

[0032] When Q2>△Q≥Q3, the second preset adjustment coefficient R2 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E*R2;

[0033] When Q3>△Q≥Q4, the third preset adjustment coefficient R3 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E*R3;

[0034] When Q4>△Q, the fourth preset adjustment coefficient R4 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E*R4.

[0035] Further, when the processing module selects the i-th preset adjustment coefficient Ri to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount of the powder feeder is △E*Ri, i = 1, 2, 3, 4, the processing module is further used to obtain the real-time pulverized coal humidity value △T in the pulverized coal humidity data information of the gas, and correct the adjusted powder feeding amount △E*Ri according to the real-time pulverized coal humidity value △T;

[0036] The processing module is further used to set a first preset pulverized coal humidity value T1, a second preset pulverized coal humidity value T2, a third preset pulverized coal humidity value T3, and a fourth preset pulverized coal humidity value T4. The processing module is further used to set a first preset correction coefficient Y1, a second preset correction coefficient Y2, a third preset correction coefficient Y3, and a fourth preset correction coefficient Y4, and 0.75>Y1>Y2>Y3>Y4>0.45;

[0037] When the processing is further used to correct the adjusted powder feeding amount △E*Ri according to the real-time pulverized coal humidity value △T, the processing module is further used to correct the adjusted powder feeding amount △E*Ri according to the relationship between the real-time pulverized coal humidity value △T and each preset pulverized coal humidity value;

[0038] When △T≥T1, the adjusted powder feeding amount △E*Ri is not corrected;

[0039] When T1 > △T ≥ T2, the first preset correction coefficient Y1 is selected to correct the adjusted powder feeding amount △E*Ri, and the corrected powder feeding amount is △E*Ri*Y1;

[0040] When T2 > △T ≥ T3, the second preset correction coefficient Y2 is selected to correct the adjusted powder feeding amount △E*Ri, and the corrected powder feeding amount is △E*Ri*Y2;

[0041] When T3 > △T ≥ T4, the third preset correction coefficient Y3 is selected to correct the adjusted powder feeding amount △E*Ri, and the corrected powder feeding amount is △E*Ri*Y3;

[0042] When T4 > △T, the fourth preset correction coefficient Y4 is selected to correct the adjusted powder feeding amount △E*Ri, and the corrected powder feeding amount is △E*Ri*Y4.

[0043] Furthermore, the processing module is also used to obtain the real-time pulverized coal content value △J in the pulverized coal content data information of the gas in the primary air duct after the powder feeding amount is corrected and the real-time pressure value △S in the gas pressure data information. The processing module is also used to set a standard pulverized coal content value J0 and a standard pressure value S0. The processing module is also used to judge whether to start the vibration mechanism and whether to increase the opening degree of the primary air damper according to the relationships between the real-time pulverized coal content value △J and the real-time pressure value △S and the standard pulverized coal content value J0 and the standard pressure value S0 respectively:

[0044] When △J ≤ J0 and △S ≤ S0, the vibration mechanism is not started and the opening degree of the primary air damper is not increased;

[0045] When △J > J0 and △S ≤ S0, the vibration mechanism is not started, but the opening degree of the primary air damper is increased;

[0046] When △J ≤ J0 and △S > S0, the vibration mechanism is started, but the opening degree of the primary air damper is not increased;

[0047] When △J > J0 and △S > S0, the vibration mechanism is started and the opening degree of the primary air damper is increased simultaneously.

[0048] Furthermore, when the processing module is also used to increase the opening degree of the primary air damper after judging that the real-time pressure value △S is greater than the standard pressure value S0, the processing module is also used to obtain the current opening degree △L of the primary air damper, and the processing module is also used to increase the opening degree △L of the primary air damper according to the real-time pressure value △S;

[0049] The processing module is further configured to set a first preset pressure value S1, a second preset pressure value S2, a third preset pressure value S3, and a fourth preset pressure value S4; the processing module is further configured to set a first preset increase coefficient U1, a second preset increase coefficient U2, a third preset increase coefficient U3, and a fourth preset increase coefficient U4, and 0 < U1 < U2 < U3 < U4 < 1;

[0050] When the processing module increases the primary air damper opening ΔL according to the real-time pressure value ΔS, the processing module increases the primary air damper opening ΔL according to the relationship between the real-time pressure value ΔS and each preset pressure value;

[0051] When ΔS < S1, the opening of the primary air damper is not increased;

[0052] When S1 ≤ ΔS < S2, the first preset increase system U1 is selected to increase the primary air damper opening ΔL, and the increased primary air damper opening is ΔL * U1;

[0053] When S2 ≤ ΔS < S3, the second preset increase system U2 is selected to increase the primary air damper opening ΔL, and the increased primary air damper opening is ΔL * U2;

[0054] When S3 ≤ ΔS < S4, the third preset increase system U3 is selected to increase the primary air damper opening ΔL, and the increased primary air damper opening is ΔL * U3;

[0055] When S4 ≤ ΔS, the fourth preset increase system U4 is selected to increase the primary air damper opening ΔL, and the increased primary air damper opening is ΔL * U4.

[0056] Further, the processing module is further configured to obtain the real-time pressure value Δs of the gas in the primary air duct after increasing the primary air damper opening, and the processing module is further configured to determine whether the primary air duct is blocked according to the relationship between the real-time pressure value Δs and the standard pressure value S0;

[0057] When Δs ≤ S0, it is determined that the primary air duct is not blocked;

[0058] When Δs > S0, it is determined that the primary air duct is blocked.

[0059] Further, the alarm mechanism further includes:

[0060] A positioning module for positioning the alarm mechanism;

[0061] After the processing module determines that the primary air duct is blocked, it sends an alarm message of the blocked position through the communication module.

[0062] Compared with the prior art, the online detection and alarm device for a primary air duct in an embodiment of the present invention has the following beneficial effects: By arranging this device inside the primary air duct, the warning mechanism obtains various data of the gas and the carried pulverized coal during the current operation of the primary air duct through the air flow speed detection module, temperature detection module, pressure detection module, humidity detection module, and concentration detection module in the air flow detection mechanism, and adjusts the output of the air flow and pulverized coal in the current primary air duct by controlling the vibration mechanism, primary air damper, and coal feeder, thereby avoiding blockage.

[0063] An online detection and alarm device for a primary air duct in an embodiment of the present invention obtains various data information of the air flow and pulverized coal in the currently detected primary air duct, determines whether blockage occurs in the current primary air duct. If blockage occurs, it processes the blockage by starting the vibration mechanism and adjusting the opening of the primary air damper. If the blockage situation is not resolved, it sends a warning message to the operator through the communication module and positioning module and stops the operation of the coal feeder, thereby avoiding the problem of combustion furnace damage and subsequent personnel casualties caused by undetected blockage of the primary air duct. At the same time, it also avoids the problems of reduced detection efficiency caused by long-term detection by operators and high personnel costs due to the need for multiple operators to detect multiple combustion furnaces simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 is a schematic structural diagram of an online detection and alarm device for a primary air duct in an embodiment of the present invention;

[0065] Figure 2 is a three-dimensional schematic diagram of an online detection and alarm device for a primary air duct in an embodiment of the present invention;

[0066] Figure 3 is a structural block diagram of the alarm device in an embodiment of the present invention.

[0067] In the figure, 1, main body; 2, vibration mechanism; 3, air flow hole; 21, electromagnet; 22, magnetic ball; 41, air flow speed detection module; 42, humidity detection module; 43, concentration detection module; 44, pressure detection module; 45, temperature detection module; 100, acquisition module; 200, communication module; 300, processing module; 400, control module; 500, positioning module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0068] The following further describes in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0069] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present application.

[0070] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0071] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0072] As Figure 1 and Figure 2 shown, an on-line detection device for a primary air duct in a preferred embodiment of an embodiment of the present invention includes: a main body 1, a vibration mechanism 2, an air flow hole 3, an air flow detection mechanism, and an alarm mechanism.

[0073] Specifically, the main body 1 is arranged inside the primary air duct, the main body 1 is connected to the inside of the primary air duct, and the main body 1 is provided with a first cavity.

[0074] Specifically, the vibration mechanism 2 is arranged inside the first cavity, the vibration mechanism 2 is connected to the inner bottom surface of the first cavity, and the vibration mechanism 2 is used to vibrate the blocked pulverized coal in the primary air duct.

[0075] Specifically, the air flow hole 3 is opened on the outer side wall of the main body 1.

[0076] Specifically, the air flow detection mechanism is arranged opposite to the air flow detection hole inside the first cavity, the air flow detection mechanism is connected to the inner bottom surface of the first cavity, and the air flow detection mechanism is used to detect the gas flowing through the air flow hole 3.

[0077] Specifically, the warning mechanism is arranged inside the first cavity. The warning mechanism is electrically connected to the air flow detection mechanism, the vibration mechanism 2, the primary air damper, and the coal feeder. The warning mechanism is used to give an alarm after the air flow detection mechanism detects abnormal gas flow in the primary air duct.

[0078] It can be understood that an on-line detection device for a primary air duct in an embodiment of the present invention is composed of a main body 1, a vibration mechanism 2, an air flow hole 3, an air flow detection mechanism, and a warning mechanism. By arranging this device inside the primary air duct, the gas with pulverized coal flowing in the primary air duct passes through the air flow hole 3 and circulates in the first cavity, enabling the air flow detection mechanism to detect the gas with pulverized coal and send the detection data to the warning mechanism, so that the warning mechanism can judge whether the primary air duct is blocked; when it is detected that the primary air duct is about to be blocked, the vibration mechanism 2, the primary air damper, and the coal feeder are controlled to perform pretreatment on the primary air duct to prevent it from being blocked; when it is detected that the primary air duct is blocked, the vibration mechanism 2, the primary air damper, and the coal feeder are controlled to dredge the blockage in the primary air duct, and further judge whether the blockage situation in the primary air duct has changed. If the blockage situation in the primary air duct has not changed, the operation of the primary air damper and the coal feeder is stopped, and the operator is warned to perform maintenance. This avoids the damage of the combustion furnace caused by the operator's missed detection of the blockage of the primary air duct. At the same time, it also solves the problem of high personnel costs caused by multiple operators being required to detect multiple combustion furnaces simultaneously.

[0079] Preferably, the vibration mechanism 2 is composed of a main body 1 and electromagnets 21 and magnetic balls 22 arranged at the left and right ends inside the main body 1.

[0080] It can be understood that by controlling the electromagnets on the left and right sides through the warning device to be energized, the electromagnetic wheels on the left and right sides inside the main body 1 are energized to generate magnetic force, which generates a repulsive force on the magnetic ball 22, causing it to continuously impact the left and right sides and thus generating vibration.

[0081] Specifically, the air flow detection mechanism in this embodiment includes: an air flow velocity detection module 41, a temperature detection module 45, a pressure detection module 44, a humidity detection module 42, and a concentration detection module 43.

[0082] Specifically, the air flow velocity detection module 41 is arranged inside the first cavity. The air flow velocity detection module 41 is connected to the inner bottom surface of the first cavity. The air flow velocity detection module 41 is used to detect the gas flow velocity in the primary air duct.

[0083] Specifically, the temperature detection module 45 is arranged inside the first cavity. The temperature detection module 45 is connected to the inner bottom surface of the first cavity. The temperature detection module 45 is used to detect the gas temperature in the primary air duct.

[0084] Specifically, the pressure detection module 44 is arranged inside the first cavity. The pressure detection module 44 is connected to the inner bottom surface of the first cavity, and the pressure detection module 44 is used to detect the gas pressure in the primary air duct.

[0085] Specifically, the humidity detection module 42 is arranged inside the first cavity. The humidity detection module 42 is connected to the inner bottom surface of the first cavity, and the humidity detection module 42 is used to detect the dryness and humidity of the pulverized coal in the gas in the primary air duct.

[0086] Specifically, the concentration detection module 43 is arranged inside the first cavity. The concentration detection module 43 is connected to the inner bottom surface of the first cavity, and the concentration detection module 43 is used to detect the pulverized coal content in the gas in the primary air duct.

[0087] Specifically, the alarm device is further used to obtain the gas flow velocity data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas in the primary air duct according to the air flow velocity detection module 41, temperature detection module 45, pressure detection module 44, humidity detection module 42, and concentration detection module 43.

[0088] Specifically, the alarm information is further used to adjust the vibration frequency of the vibration mechanism 2, the opening degree of the primary air damper, and the coal feeding amount of the coal feeder according to the gas flow velocity data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas.

[0089] Specifically, the alarm information is further used to determine whether a blockage occurs in the primary air duct according to the gas flow velocity data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas. Among them, if the alarm mechanism determines that a blockage occurs in the primary air duct, an alarm information is sent for notification.

[0090] It can be understood that the air flow detection device in this embodiment is composed of an air flow velocity detection module 41, a temperature detection module 45, a pressure detection module 44, a humidity detection module 42, and a concentration detection module 43. By detecting the gas flowing into the first cavity, the air flow velocity, temperature, pressure, humidity of the pulverized coal carried in the gas, and the concentration of the pulverized coal in the gas in the primary air duct are obtained, and this information is sent to the alarm mechanism to determine whether a blockage occurs in the primary air duct, and an alarm information is sent to the operator when a blockage occurs to notify the operator to come and handle it, solving the problem of reduced detection efficiency in the traditional method that relies on the operator to detect the primary air duct for a long time.

[0091] It can be seen that in the above embodiments, the main body 1 is arranged in the primary air duct. The pulverized coal with gas flowing inside the primary air duct flows through the main body 1 through the air flow holes 3 opened at both ends of the side wall of the main body 1. The air flow velocity detection module 41, temperature detection module 45, pressure detection module 44, humidity detection module 42 and concentration detection module 43 arranged in the main body 1 are used to obtain the air flow velocity, temperature, pressure, humidity of the pulverized coal carried in the gas and the concentration of the pulverized coal contained in the gas in the primary air duct, and send this information to the alarm mechanism. The alarm mechanism judges whether there is a blockage in the primary air duct and controls the vibration mechanism 2, primary air damper and coal feeder to process the primary air duct. If it cannot be processed, an alarm message is sent to the operator for processing.

[0092] In a preferred embodiment based on the above embodiments, participate Figure 3 As shown, in the embodiment of the present invention, the alarm mechanism includes: a collection module 100, a communication module 200, a processing module 300 and a control module 400.

[0093] Specifically, the collection module 100 is electrically connected to the air flow velocity detection module 41, temperature detection module 45, pressure detection module 44, humidity detection module 42 and concentration detection module 43. The collection module 100 is used to collect the air flow velocity data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas and pulverized coal content data information in the gas in the primary air duct. The collection module 100 is used to collect the vibration frequency of the vibration mechanism 2 and the coal feeding amount information of the coal feeder.

[0094] Specifically, the communication module 200 is provided with a 4G signal unit and a 5G signal unit. The communication module 200 is used to send information.

[0095] Specifically, the processing module 300 adjusts the vibration frequency of the vibration mechanism 2 and the coal feeding amount information of the coal feeder according to the air flow velocity data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas and pulverized coal content data information in the gas in the primary air duct. The processing module 300 is also used to send an alarm message through the communication module 200 when it judges that there is a blockage in the primary air duct.

[0096] Specifically, the control module 400 is used to control the vibration mechanism 2, primary air damper and coal feeder.

[0097] Specifically, the processing module 300 is also used to obtain the air flow velocity data information, obtain the real-time gas flow velocity △Q in the gas flow velocity information. The processing module 300 is also used to obtain the coal feeding amount △E of the current coal feeder. The processing module 300 is also used to adjust the coal feeding amount △E of the current coal feeder according to the real-time gas flow velocity △Q.

[0098] Specifically, the processing module 300 is further configured to set a first preset gas flow rate Q1, a second preset gas flow rate Q2, a third preset gas flow rate Q3, and a fourth preset gas flow rate Q4. The processing module 300 is further configured to set a first preset adjustment coefficient R1, a second preset adjustment coefficient R2, a third preset adjustment coefficient R3, and a fourth preset adjustment coefficient R4, and 1 > R1 > R2 > R3 > R4 > 0.

[0099] Specifically, when the processing module 300 adjusts the powder feeding amount △E of the current powder feeder according to the real-time gas flow rate △Q, it adjusts the powder feeding amount △E of the current powder feeder according to the relationship between the real-time gas flow rate △Q and each preset gas flow rate:

[0100] When △Q ≥ Q1, the powder feeding amount △E of the current powder feeder is not adjusted;

[0101] When Q1 > △Q ≥ Q2, the first preset adjustment coefficient R1 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E * R1;

[0102] When Q2 > △Q ≥ Q3, the second preset adjustment coefficient R2 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E * R2;

[0103] When Q3 > △Q ≥ Q4, the third preset adjustment coefficient R3 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E * R3;

[0104] When Q4 > △Q, the fourth preset adjustment coefficient R4 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E * R4.

[0105] It can be understood that in this embodiment, by adjusting the powder feeding amount of the powder feeder according to the relationship between the real-time gas flow rate △Q and each preset gas flow rate, and dynamically adjusting the powder feeding amount of the powder feeder according to the real-time gas flow rate, the problem of blockage of the primary air duct caused by a large powder feeding amount when the air flow in the primary air duct is small is avoided.

[0106] Specifically, the processing module 300 is further configured to select the i-th preset adjustment coefficient Ri to adjust the powder feeding amount of the current powder feeder when i = 1, 2, 3, 4, and the adjusted powder feeding amount of the powder feeder is △E * Ri. The processing module 300 is further configured to obtain the real-time coal powder humidity value △T in the coal powder humidity data information of the gas, and correct the adjusted powder feeding amount △E * Ri according to the real-time coal powder humidity value △T.

[0107] Specifically, the processing module 300 is further configured to set a first preset pulverized coal humidity value T1, a second preset pulverized coal humidity value T2, a third preset pulverized coal humidity value T3, and a fourth preset pulverized coal humidity value T4. The processing module 300 is further configured to set a first preset correction coefficient Y1, a second preset correction coefficient Y2, a third preset correction coefficient Y3, and a fourth preset correction coefficient Y4, and 0.75 > Y1 > Y2 > Y3 > Y4 > 0.45.

[0108] Specifically, when the processing is further used to correct the adjusted coal feeding amount △E*Ri according to the real-time pulverized coal humidity value △T, the processing module 300 is further used to correct the adjusted coal feeding amount △E*Ri according to the relationship between the real-time pulverized coal humidity value △T and each preset pulverized coal humidity value;

[0109] When △T≥T1, the adjusted coal feeding amount △E*Ri is not corrected;

[0110] When T1>△T≥T2, the first preset correction coefficient Y1 is selected to correct the adjusted coal feeding amount △E*Ri, and the corrected coal feeding amount is △E*Ri*Y1;

[0111] When T2>△T≥T3, the second preset correction coefficient Y2 is selected to correct the adjusted coal feeding amount △E*Ri, and the corrected coal feeding amount is △E*Ri*Y2;

[0112] When T3>△T≥T4, the third preset correction coefficient Y3 is selected to correct the adjusted coal feeding amount △E*Ri, and the corrected coal feeding amount is △E*Ri*Y3;

[0113] When T4>△T, the fourth preset correction coefficient Y4 is selected to correct the adjusted coal feeding amount △E*Ri, and the corrected coal feeding amount is △E*Ri*Y4.

[0114] It can be understood that by correcting the coal feeding amount according to the relationship between the real-time pulverized coal humidity value △T and each preset pulverized coal humidity value in the gas, the coal feeding amount of the coal feeder is corrected by judging the humidity of the pulverized coal in the gas, preventing the pulverized coal from being too wet and sticking, thus causing blockage of the primary air duct. At the same time, it also avoids the problem that the temperature of the combustion furnace is too low to burn the pulverized coal, resulting in the accumulation of pulverized coal and blocking the primary air duct.

[0115] Specifically, the processing module 300 is further configured to obtain the real-time pulverized coal content value △J in the pulverized coal content data information of the gas in the primary air duct after the coal feeding amount is corrected, and the real-time pressure value △S in the gas pressure data information. The processing module 300 is further configured to set a standard pulverized coal content value J0 and a standard pressure value S0. The processing module 300 is further configured to determine whether to start the vibration mechanism 2 and whether to increase the opening degree of the primary air damper according to the relationship between the real-time pulverized coal content value △J and the real-time pressure value △S and the standard pulverized coal content value J0 and the standard pressure value S0 respectively:

[0116] When △J ≤ J0 and △S ≤ S0, the vibration mechanism 2 is not started, and the opening degree of the primary air damper is not increased;

[0117] When △J > J0 and △S ≤ S0, the vibration mechanism 2 is not started, but the opening degree of the primary air damper is increased;

[0118] When △J ≤ J0 and △S > S0, the vibration mechanism 2 is started, but the opening degree of the primary air damper is not increased;

[0119] When △J > J0 and △S > S0, the vibration mechanism 2 is started, and at the same time the opening degree of the primary air damper is increased.

[0120] It can be understood that by comparing the real-time pulverized coal content value △J and the real-time pressure value △S of the gas in the primary air duct with the standard pulverized coal content value J0 and the standard pressure value S0 of the gas in the primary air duct, it is determined whether the primary air duct is blocked. If △J and △S are less than or equal to J0 and S0, it is determined that the current primary air duct is not blocked, and there is no need to start the vibration mechanism 2 and increase the opening degree of the primary air damper; if △J is greater than J0 and △S is less than or equal to S0, it is determined that there is no blockage in the current primary air duct, but the amount of pulverized coal carried by the gas in the current primary air duct is greater than the standard value and it is extremely easy to be blocked. Therefore, the vibration device is not started, but the opening of the primary air damper is increased to make the gas carrying pulverized coal pass through more quickly and avoid accumulation and blockage; if △J is less than or equal to J0 and △S is greater than S0, it is determined that the current primary air duct is blocked, but the amount of pulverized coal carried by the gas in the primary air duct is less than or equal to the standard value, and there is no need to increase the opening degree of the primary air damper, but the vibration mechanism 2 needs to be started to loosen the blockage, and then the blockage is flushed and dredged by the gas in the primary air duct; if △J is greater than J0 and △S is greater than S0, it is determined that the current primary air duct is blocked and the amount of pulverized coal carried by the gas in the primary air duct is greater than the standard value. It is necessary to start the vibration device to loosen the blockage, and then the blockage is flushed by the gas in the primary air duct and made to pass through quickly to avoid more serious blockage and accumulation.

[0121] Specifically, when the processing module 300 is further configured to increase the opening degree of the primary air damper after determining that the real-time pressure value △S is greater than the standard pressure value S0, the processing module 300 is further configured to obtain the current opening degree △L of the primary air damper, and the processing module 300 is further configured to increase the opening degree △L of the primary air damper according to the real-time pressure value △S.

[0122] Specifically, the processing module 300 is further configured to set a first preset pressure value S1, a second preset pressure value S2, a third preset pressure value S3, and a fourth preset pressure value S4; the processing module 300 is further configured to set a first preset increase coefficient U1, a second preset increase coefficient U2, a third preset increase coefficient U3, and a fourth preset increase coefficient U4, and 0 < U1 < U2 < U3 < U4 < 1;

[0123] When the processing module 300 is further configured to increase the opening degree △L of the primary air damper according to the real-time pressure value △S, the processing module 300 increases the opening degree △L of the primary air damper according to the relationship between the real-time pressure value △S and each preset pressure value;

[0124] When △S < S1, the opening degree of the primary air damper is not increased;

[0125] When S1 ≤ △S < S2, the first preset increase system U1 is selected to increase the opening degree △L of the primary air damper, and the increased opening degree of the primary air damper is △L * U1;

[0126] When S2 ≤ △S < S3, the second preset increase system U2 is selected to increase the opening degree △L of the primary air damper, and the increased opening degree of the primary air damper is △L * U2;

[0127] When S3 ≤ △S < S4, the third preset increase system U3 is selected to increase the opening degree △L of the primary air damper, and the increased opening degree of the primary air damper is △L * U3;

[0128] When S4 ≤ △S, the fourth preset increase system U4 is selected to increase the opening degree △L of the primary air damper, and the increased opening degree of the primary air damper is △L * U4.

[0129] It can be understood that by increasing the opening degree of the primary air damper according to the relationship between the real-time pressure value △S and each preset pressure value, how much the opening degree of the primary air damper is increased is controlled by the real-time pressure value in the current primary air duct.

[0130] Specifically, the processing module 300 is further configured to obtain the real-time pressure value △s of the gas in the primary air duct after increasing the opening degree of the primary air damper, and the processing module 300 is further configured to determine whether there is a blockage in the primary air duct according to the relationship between the real-time pressure value △s and the standard pressure value S0:

[0131] When △s ≤ S0, it is determined that there is no blockage in the primary air duct;

[0132] When △s > S0, it is determined that a blockage has occurred in the primary air duct.

[0133] It can be understood that by detecting the pressure in the primary air duct after increasing the primary air damper, it is determined whether the blockage cannot be handled and a real blockage has occurred. Among them, when the pressure in the primary air duct after increasing the primary air damper is less than or equal to the standard value, it indicates that the blockage in the current primary air duct has been cleared and no blockage has occurred; when the pressure in the primary air duct after increasing the primary air damper is still greater than the standard value, it indicates that the blockage is still occurring and may cause accumulation.

[0134] Specifically, the warning mechanism further includes: a positioning module 500 for positioning the warning mechanism;

[0135] Specifically, after the processing module 300 determines that a blockage has occurred in the primary air duct, it sends a warning message about the blockage location through the communication module 200.

[0136] It can be understood that when the processing module 300 discovers a blockage in the primary air duct that cannot be cleared and will cause accumulation, it will immediately send the location of the primary air duct to the operator through the communication module 200 to notify the operator to perform maintenance in a timely manner.

[0137] In summary, it can be seen that the working process of the present invention is as follows: by setting the device inside the primary air duct, the warning mechanism obtains various data of the gas and the carried pulverized coal during the current operation of the primary air duct through the air velocity detection module 41, temperature detection module 45, pressure detection module 44, humidity detection module 42, and concentration detection module 43 in the air flow detection mechanism, and adjusts the output of the air flow and pulverized coal in the current primary air duct by controlling the vibration mechanism 2, primary air damper, and coal feeder, so as to avoid blockage. Among them, if a blockage occurs, a warning message with the location of the primary air duct is sent to the operator through the warning mechanism to notify the operator to perform maintenance in a timely manner.

[0138] In summary, the embodiment of the present invention provides an on-line detection and alarm device for a primary air duct, which obtains various data information of the air flow and pulverized coal in the currently detected primary air duct, determines whether a blockage has occurred in the current primary air duct. If a blockage occurs, the vibration mechanism 2 is started and the opening of the primary air damper is adjusted to handle the blockage. If the blockage situation is not resolved, a warning message is sent to the operator through the communication module 200 and the positioning module 500, and the operation of the coal feeder is stopped, thereby avoiding the problem of damage to the combustion furnace caused by missed detection of the blockage in the primary air duct, resulting in personal injuries, and at the same time avoiding the problems of reduced detection efficiency caused by long-term detection by operators and high personnel costs caused by multiple operators being required to detect multiple combustion furnaces simultaneously.

[0139] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0140] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0141] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means implements the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0142] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: still can modify the specific implementation manners of the present invention or make equivalent substitutions, and any modification or equivalent substitution that does not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. An on-line detection and alarm device for primary air ducts, characterized in that, Comprising: A body, which is arranged inside the primary air duct, the body is connected to the inside of the primary air duct, and the body is provided with a first cavity; A vibration mechanism, which is arranged inside the first cavity, the vibration mechanism is connected to the inner bottom surface of the first cavity, and the vibration mechanism is used to vibrate the blocked pulverized coal in the primary air duct; Air flow holes, which are opened on the outer side wall of the body; An air flow detection mechanism, which is arranged opposite to the air flow detection holes inside the first cavity, the air flow detection mechanism is connected to the inner bottom surface of the first cavity, and the air flow detection mechanism is used to detect the gas flowing through the air flow holes; An alarm mechanism, which is arranged inside the first cavity, the alarm mechanism is electrically connected to the air flow detection mechanism, the vibration mechanism, the primary air damper and the coal feeder, and the alarm mechanism is used to give an alarm after the air flow detection mechanism detects abnormal gas flow in the primary air duct; The alarm mechanism further includes: a collection module, a communication module, a processing module and a control module; The processing module adjusts the vibration frequency of the vibration mechanism and the coal feeding amount of the coal feeder according to the gas flow velocity data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas and pulverized coal content data information in the gas in the primary air duct. The processing module is also used to judge that when the primary air duct is blocked, an alarm message is sent through the communication module; The processing module is further used to adjust the coal feeding amount of the current coal feeder by selecting the i-th preset adjustment coefficient Ri, and the adjusted coal feeding amount of the coal feeder is △E*Ri, i = 1, 2, 3, 4. The processing module is also used to obtain the real-time pulverized coal humidity value △T in the pulverized coal humidity data information in the gas, and correct the adjusted coal feeding amount △E*Ri according to the real-time pulverized coal humidity value △T; The processing module is further used to set a first preset pulverized coal humidity value T1, a second preset pulverized coal humidity value T2, a third preset pulverized coal humidity value T3 and a fourth preset pulverized coal humidity value T4. The processing module is also used to set a first preset correction coefficient Y1, a second preset correction coefficient Y2, a third preset correction coefficient Y3 and a fourth preset correction coefficient Y4, and 0.75 > Y1 > Y2 > Y3 > Y4 > 0.45; When the processing is further used to correct the adjusted coal feeding amount △E*Ri according to the real-time pulverized coal humidity value △T, the processing module is also used to correct the adjusted coal feeding amount △E*Ri according to the relationship between the real-time pulverized coal humidity value △T and each preset pulverized coal humidity value; When △T ≥ T1, the adjusted coal feeding amount △E*Ri is not corrected; When T1 > △T ≥ T2, the first preset correction coefficient Y1 is selected to correct the adjusted coal feeding amount △E*Ri, and the corrected coal feeding amount is △E*Ri*Y1; When T2 > △T ≥ T3, the second preset correction coefficient Y2 is selected to correct the adjusted coal feeding amount △E*Ri, and the corrected coal feeding amount is △E*Ri*Y2; When T3 > ΔT ≥ T4, the third preset correction coefficient Y3 is selected to correct the adjusted powder feeding amount ΔE*Ri, and the corrected powder feeding amount is ΔE*Ri*Y3; When T4 > ΔT, the fourth preset correction coefficient Y4 is selected to correct the adjusted powder feeding amount ΔE*Ri, and the corrected powder feeding amount is ΔE*Ri*Y4; The processing module is further configured to obtain the real-time pulverized coal content value ΔJ in the pulverized coal content data information of the gas in the primary air duct and the real-time pressure value ΔS in the gas pressure data information after the powder feeding amount is corrected. The processing module is further configured to set a standard pulverized coal content value J0 and a standard pressure value S0. The processing module is further configured to determine whether to start the vibration mechanism and whether to increase the opening degree of the primary air damper according to the relationship between the real-time pulverized coal content value ΔJ and the real-time pressure value ΔS and the standard pulverized coal content value J0 and the standard pressure value S0 respectively: When ΔJ ≤ J0 and ΔS ≤ S0, the vibration mechanism is not started and the opening degree of the primary air damper is not increased; When ΔJ > J0 and ΔS ≤ S0, the vibration mechanism is not started, but the opening degree of the primary air damper is increased; When ΔJ ≤ J0 and ΔS > S0, the vibration mechanism is started, but the opening degree of the primary air damper is not increased; When ΔJ > J0 and ΔS > S0, the vibration mechanism is started and the opening degree of the primary air damper is increased at the same time.

2. The on-line detection and alarm device for primary air ducts according to claim 1, characterized in that, The air flow detection mechanism includes: An air flow velocity detection module is arranged inside the first cavity. The air flow velocity detection module is connected to the inner bottom surface of the first cavity. The air flow velocity detection module is used to detect the gas flow velocity in the primary air duct; A temperature detection module is arranged inside the first cavity. The temperature detection module is connected to the inner bottom surface of the first cavity. The temperature detection module is used to detect the gas temperature in the primary air duct; A pressure detection module is arranged inside the first cavity. The pressure detection module is connected to the inner bottom surface of the first cavity. The pressure detection module is used to detect the gas pressure in the primary air duct; A humidity detection module is arranged inside the first cavity. The humidity detection module is connected to the inner bottom surface of the first cavity. The humidity detection module is used to detect the dryness and humidity of the pulverized coal in the gas in the primary air duct; A concentration detection module is arranged inside the first cavity. The concentration detection module is connected to the inner bottom surface of the first cavity. The concentration detection module is used to detect the pulverized coal content in the gas in the primary air duct.

3. The on-line detection and alarm device for primary air ducts according to claim 2, characterized in that, The alarm device is further configured to obtain the gas flow velocity data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas and pulverized coal content data information in the gas in the primary air duct according to the air flow velocity detection module, temperature detection module, pressure detection module, humidity detection module and concentration detection module; The alarm information is also used to adjust the vibration frequency of the vibration mechanism, the opening degree of the primary air damper, and the coal feeding amount of the coal feeder according to the gas flow rate data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas; The alarm information is also used to judge whether a blockage occurs in the primary air duct according to the gas flow rate data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas, where if the alarm mechanism judges that a blockage occurs in the primary air duct, an alarm information is sent for notification.

4. The on-line detection and alarm device for primary air ducts according to claim 3, characterized in that, The alarm mechanism includes: An acquisition module, electrically connected to the air flow velocity detection module, temperature detection module, pressure detection module, humidity detection module, and concentration detection module. The acquisition module is used to acquire the gas flow rate data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas in the primary air duct. The acquisition module is used to acquire the vibration frequency of the vibration mechanism and the coal feeding amount information of the coal feeder; A communication module, provided with a 4G signal unit and a 5G signal unit, and the communication module is used to send information; A processing module, which adjusts the vibration frequency of the vibration mechanism and the coal feeding amount information of the coal feeder according to the gas flow rate data information, gas temperature data information, gas pressure data information, pulverized coal humidity data information in the gas, and pulverized coal content data information in the gas in the primary air duct. The processing module is also used to send an alarm information through the communication module when judging that a blockage occurs in the primary air duct; A control module, which is used to control the vibration mechanism, the primary air damper, and the coal feeder.

5. The on-line detection and alarm device for the primary air duct according to claim 4, wherein the processing module is further used to obtain the gas flow rate data information, obtain the real-time gas flow velocity △Q in the gas flow rate information, the processing module is further used to obtain the coal feeding amount △E of the current coal feeder, and the processing module is further used to adjust the coal feeding amount △E of the current coal feeder according to the real-time gas flow velocity △Q; the processing module is further used to set a first preset gas flow velocity Q1, a second preset gas flow velocity Q2, a third preset gas flow velocity Q3, and a fourth preset gas flow velocity Q4. The processing module is further used to set a first preset adjustment coefficient R1, a second preset adjustment coefficient R2, a third preset adjustment coefficient R3, and a fourth preset adjustment coefficient R4, and 1>R1>R2>R3>R4>0; when the processing module adjusts the coal feeding amount △E of the current coal feeder according to the real-time gas flow velocity △Q, it adjusts the coal feeding amount △E of the current coal feeder according to the relationship between the real-time gas flow velocity △Q and each preset gas flow velocity; when △Q≥Q1, the coal feeding amount △E of the current coal feeder is not adjusted; when Q1>△Q≥Q2, the first preset adjustment coefficient R1 is selected to adjust the coal feeding amount of the current coal feeder, and the adjusted coal feeding amount is △E*R1; When Q2 > △Q ≥ Q3, the second preset adjustment coefficient R2 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E * R2; When Q3 > △Q ≥ Q4, the third preset adjustment coefficient R3 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E * R3; When Q4 > △Q, the fourth preset adjustment coefficient R4 is selected to adjust the powder feeding amount of the current powder feeder, and the adjusted powder feeding amount is △E * R4.

6. The on-line detection and alarm device for the primary air duct according to claim 5, characterized in that The processing module is further configured to, after determining that the real-time pressure value △S is greater than the standard pressure value S0 and increasing the opening degree of the primary air damper, the processing module is further configured to obtain the current opening degree △L of the primary air damper, and the processing module is further configured to increase the opening degree △L of the primary air damper according to the real-time pressure value △S; The processing module is further configured to set a first preset pressure value S1, a second preset pressure value S2, a third preset pressure value S3, and a fourth preset pressure value S4; the processing module is further configured to set a first preset increase coefficient U1, a second preset increase coefficient U2, a third preset increase coefficient U3, and a fourth preset increase coefficient U4, and 0 < U1 < U2 < U3 < U4 < 1; When the processing module increases the opening degree △L of the primary air damper according to the real-time pressure value △S, the processing module increases the opening degree △L of the primary air damper according to the relationship between the real-time pressure value △S and the respective preset pressure values; When △S < S1, the opening degree of the primary air damper is not increased; When S1 ≤ △S < S2, the first preset increase system U1 is selected to increase the opening degree △L of the primary air damper, and the increased opening degree of the primary air damper is △L * U1; When S2 ≤ △S < S3, the second preset increase system U2 is selected to increase the opening degree △L of the primary air damper, and the increased opening degree of the primary air damper is △L * U2; When S3 ≤ △S < S4, the third preset increase system U3 is selected to increase the opening degree △L of the primary air damper, and the increased opening degree of the primary air damper is △L * U3; When S4 ≤ △S, the fourth preset increase system U4 is selected to increase the opening degree △L of the primary air damper, and the increased opening degree of the primary air damper is △L * U4.

7. The on-line detection and alarm device for the primary air duct according to claim 6, characterized in that The processing module is further configured to obtain the real-time pressure value △s of the gas in the primary air duct after increasing the opening degree of the primary air damper, and the processing module is further configured to judge whether the primary air duct is blocked according to the relationship between the real-time pressure value △s and the standard pressure value S0; When △s ≤ S0, it is judged that the primary air duct is not blocked; When △s > S0, it is judged that the primary air duct is blocked.

8. The on-line detection and alarm device for primary air ducts according to claim 7, characterized in that, The alarm mechanism further includes: A positioning module for positioning the alarm mechanism; After the processing module determines that the primary air duct is blocked, the communication module is used to send an alarm message about the blockage location.

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