A smart dust monitoring and removal system and its design method

Abstract

This invention relates to an intelligent dust monitoring and removal system and its design method. The system includes a detector, which mainly consists of a polarized light source and a polarized light receiver. The polarized light source emits polarized light, and the polarized light receiver receives the polarized light emitted by the opposing polarized light source. The detector measures and analyzes the concentration and diffusion gradient data of the dust, and transmits the data to the system processor. Based on the data values, the processor sends instructions to the dust removal fan to adjust the fan's airflow. Dust is precisely removed according to the dust concentration and diffusion gradient. After passing through the dust hood and dust removal pipeline, the dust enters the dust collector for further purification. This invention can intelligently adjust the fan airflow based on the dust concentration and gradient information sent by the detector, ensuring both effective dust removal and energy saving.

Description

Technical Field

[0001] This invention belongs to the technical field of dust removal systems, and relates to an intelligent dust removal monitoring system and its design method. Background Technology

[0002] The dust removal system field is currently developing rapidly, with new technologies emerging constantly, and significant progress has been made in terms of intelligence and efficiency. However, there is still considerable room for technological development in dust removal systems. For example, current intelligent dust removal systems are limited to detecting the presence of smoke and dust to control the on / off state of the dust collector. This response has certain drawbacks, such as low sensitivity; small amounts of released smoke and dust are not easily detected, and over time, a large accumulation of smoke and dust in the environment can occur, making it impossible to detect the concentration of smoke and dust. Existing flow field technology analyzes the presence of smoke and dust based on the thermal imaging characteristics of flue gas to control the start and stop of the dust collector. The limitation of this technology is that it cannot adjust the airflow of the dust collector according to the amount of smoke and dust. For smoke and dust at room temperature, since the temperature of the smoke and dust is the same as the ambient temperature, thermal imaging is ineffective or has large errors, easily leading to failure to start or false start. Existing technology also uses smoke and dust concentration sensors, but their limitation is that the detection range is limited; they can only detect the smoke and dust concentration at a specific point and cannot represent the smoke and dust concentration in the environment. Therefore, smoke and dust concentration sensors can only be used in certain specific limited spaces or special critical locations. Existing applications involve installing sensors at multiple locations within a factory to detect dust concentration. However, this method suffers from a significant drawback: by the time the sensors detect dust, it has already permeated the factory, resulting in a severe lag and failing to protect the environment. Furthermore, after the dust collector has been running for a period, the dust concentration near the sensor drops below the collector's trigger value, causing it to stop operating. However, dust still exists in the environment far from the sensor, undetectable by the sensor, thus limiting the dust removal effect. Two patent documents, CN202210758186.1 and CN201810881274.4, mention the application of flow field technology and dust concentration sensor technology in intelligent dust removal systems, representing technological innovations to traditional dust collectors. However, the aforementioned drawbacks still persist. Summary of the Invention

[0003] This invention addresses the aforementioned shortcomings by innovating and designing a polarized light source measurement device that can relatively accurately measure smoke and dust concentration and smoke and dust diffusion gradient (characterizing the ability of smoke and dust to diffuse). The variable frequency fan of the dust collector will intelligently adjust the air volume according to the smoke and dust concentration and diffusion gradient (characterizing the ability of smoke and dust to diffuse). Moreover, the dust removal system of this invention acts at the source of smoke and dust, removing dust at the source and preventing smoke and dust from spreading.

[0004] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0005] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0006] An intelligent dust monitoring and removal system includes a detector 1; the detector 1 is capable of detecting smoke and dust concentration and diffusion gradient, and the detector 1 mainly consists of a polarized light source 5 and a polarized light receiver 6.

[0007] The polarized light source 5 is used to emit polarized light;

[0008] The polarized light receiver 6 is used to receive polarized light emitted from the polarized light generator opposite to it.

[0009] Furthermore, an intelligent monitoring and dust removal system also includes a dust generation source 2, a dust removal hood 3, and a dust removal pipeline 4;

[0010] The smoke and dust source 2 is surrounded by the detector and is the source of smoke and dust.

[0011] The detector 1 measures and analyzes the concentration and diffusion gradient data of the smoke and dust, and transmits the data to the system processor. The processor sends instructions to the dust removal fan according to the data value to adjust the air volume of the dust removal fan. The dust is accurately removed according to the concentration and diffusion gradient of the smoke and dust. After passing through the dust removal hood 3 and the dust removal pipeline 4, the smoke and dust enter the dust collector for subsequent purification treatment.

[0012] Furthermore, the detector 1 is equipped with two sets of upright, oppositely arranged components; according to the direction of the light source, it is divided into the X direction and the Y direction, forming a working unit.

[0013] Furthermore, three work units are set up, namely work unit A, work unit B, and work unit C; the three work units are arranged vertically.

[0014] Furthermore, the detector 1 is a polarized light dust concentration-gradient detector, which can detect dust concentration by light transmittance, and the size of the detection working element can be designed according to the size of the dust generation location.

[0015] A design method for an intelligent dust monitoring system, comprising setting up a detector 1, which measures and analyzes the concentration and diffusion gradient data of dust.

[0016] Furthermore, the detector 1 measures and analyzes the concentration and diffusion gradient data of the smoke and dust. The detector 1 transmits the data to the system processor via a wireless network. Based on the data value, the processor sends instructions to the dust removal fan to adjust the air volume of the dust removal fan. The dust is then precisely removed according to the concentration and diffusion gradient of the smoke and dust. After passing through the dust removal hood 3 and the dust removal pipeline 4, the smoke and dust enter the dust collector for subsequent purification treatment.

[0017] Furthermore, the detector 1 is equipped with three working units, namely working unit A, working unit B, and working unit C;

[0018] The three work units are arranged vertically.

[0019] Furthermore, the intensity of the light emitted by the polarized light source 5 is denoted as *a*, and the intensity of the light received by the polarized light receiver after being obstructed by smoke and dust during propagation is denoted as *b*. The intensity of the emitted and received light of the first beam is denoted as *a1* and *b1*, the intensity of the emitted and received light of the second beam is denoted as *a2* and *b2*, and so on, until the intensity of the emitted and received light of the nth beam is denoted as *a*. n b n The intensity difference between the emitted and received light sources is denoted as ξ = (a1 – b1) + (a2 – b2) + ... + (a n -b n );

[0020] Two sets of components arranged opposite each other, divided into X and Y directions according to the direction of the light source, form a working unit, denoted as working unit A;

[0021] The intensity difference between the light source emitted and received in the X direction is denoted as ξx = (a x1 -b x1 )+(a x2 -b x2 )+……+(a xn -b xn );

[0022] The intensity difference between the light source emitted and received in the Y direction is denoted as ξy=(a y1 -b y1 )+(a y2 -b y2 )+……+(a yn -b yn );

[0023] The intensity difference between the emitted and received light sources in working unit A is denoted as δ1 = ξx + ξy; the total intensity of the emitted light source is denoted as A1 = a x1 +a x2 +……+ay1 +a y2 +……+a yn ;

[0024] The light intensity loss rate of working unit A is η1 = δ1 / A1, and η1 is used to characterize the smoke and dust concentration. The larger η1 is, the greater the light intensity loss, the worse the light transmittance, and the greater the smoke and dust concentration.

[0025] Light intensity loss rate of working unit B η2=δ2 / A2;

[0026] Light intensity loss rate of working unit C η3=δ3 / A3;

[0027] The following parameters were obtained:

[0028] The light intensity difference δ1 of working unit A, and the light intensity loss rate η1=δ1 / A1;

[0029] The light intensity difference δ2 of working unit B, and the light intensity loss rate η2=δ2 / A2;

[0030] The light intensity difference δ3 of working unit C, and the light intensity loss rate η3=δ3 / A3;

[0031] Smoke concentration is positively correlated with light intensity loss rate. Smoke concentration value:

[0032] Working unit A, γ1=Kη1=Kδ1 / A1;

[0033] Working unit B, γ2=Kη1=Kδ2 / A2;

[0034] Working unit C, γ3=Kη3=Kδ3 / A3;

[0035] K is a constant;

[0036] The average dust concentration γ = (γ1 + γ2 + γ3) / 3 is specified to guide the operating power of the dust removal fan and is one of the parameters that determines the intelligent adjustment of the air volume of the fan.

[0037] Smoke concentration gradient: β=M{[(γ1-γ2)] 2 +(γ2-γ3) 2 ] / 2} 1 / 2 M is a constant;

[0038] The concentration gradient is expressed as the arithmetic square root of the concentration difference between the three working units. The smaller the concentration gradient, the stronger the diffusion ability of the smoke and dust; the larger the gradient, the weaker the diffusion ability of the smoke and dust.

[0039] Furthermore, the operating power of the dust collector fan: W 开 =LW 额 *γ / β; L is a constant, W 额 This refers to the rated power of the dust removal fan.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] Existing intelligent dust removal systems lack the technology to accurately set the airflow of the dust removal fan based on changes in smoke and dust concentration. They also lack methods for accurately detecting smoke and dust concentration (especially the average smoke and dust concentration within a space), and effective technical means are lacking in measuring the smoke and dust diffusion gradient (characterizing the diffusion capacity of smoke and dust). This invention designs a polarized light smoke concentration-gradient detector (hereinafter referred to as: the detector), capable of measuring smoke and dust concentration and diffusion gradient. Simultaneously, an intelligent dust collector is designed that can intelligently adjust the fan airflow based on the smoke and dust concentration and gradient information sent by the detector, ensuring both effective dust removal and energy conservation. Attached Figure Description

[0042] The invention will now be further described with reference to the accompanying drawings:

[0043] Figure 1 This is a schematic diagram of the detector's structure;

[0044] Figure 2 A schematic diagram showing the two sets of components of the detector placed vertically opposite each other;

[0045] Figure 3 A schematic diagram showing two sets of relatively arranged components forming a working unit for the detector;

[0046] Figure 4 This is a schematic diagram showing the vertical arrangement of the three work units;

[0047] Figure 5 This is a schematic diagram of the overall structure of the intelligent monitoring and dust removal system described in this invention;

[0048] In the picture:

[0049] 1. Detector;

[0050] 2. Sources of smoke and dust generation;

[0051] 3. Dust collector cover;

[0052] 4. Dust collection pipeline;

[0053] 5. Polarized light source;

[0054] 6. Polarized light receiver Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0056] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0057] The present invention will now be described in detail with reference to the accompanying drawings:

[0058] 1. See reference Figure 5 Schematic diagram of dust removal system structure:

[0059] Number 1: Polarized light dust concentration-gradient detector (hereinafter referred to as: detector), which can detect dust concentration and diffusion gradient (characterizing diffusion ability);

[0060] Number 2: The source of smoke and dust, surrounded by the detector, is the source of smoke and fumes;

[0061] Number 3: Dust collector hood;

[0062] Number 4: Dust collection pipeline;

[0063] 2. Workflow:

[0064] Smoke and dust are generated from source number 2 and overflow. After passing through detector number 1, the detector measures and analyzes the concentration and diffusion gradient of the smoke and dust, and transmits the data to the system processor. Based on the data values, the processor sends instructions to the dust removal fan to adjust the air volume of the dust removal fan. Based on the smoke and dust concentration and diffusion gradient, the smoke and dust enter the dust collector after passing through dust hood number 3 and dust removal pipeline number 4, and then undergoes further purification treatment.

[0065] 3. Detailed Explanation of Core Structure and Core Technologies:

[0066] (1) Polarized light dust concentration-gradient detector:

[0067] like Figure 1 As shown, this is one working element of the detector; two such elements are arranged opposite each other (e.g., Figure 2 In practical applications, the two components are placed vertically opposite each other. Figure 2 For ease of explanation, it is displayed flat. It completes the emission and reception of polarized light. Number 5 is the polarized light source (hereinafter referred to as the light source), which emits polarized light. The polarized light source generating device is an existing mature technology and is not the subject of this invention; its principle will not be elaborated here. Number 6 is the polarized light receiver (hereinafter referred to as the receiver), used to receive polarized light emitted from the polarized light source opposite it. Its core component is a light intensity sensor, which can detect the intensity of the received light. The light intensity sensor is also a mature product and will not be elaborated upon in this invention.

[0068] Let the intensity of the light emitted by the light source be denoted as *a*, and the intensity of the light received by the receiver after being obstructed by smoke and dust during propagation be denoted as *b*. The intensities emitted and received by the first beam of light are denoted as *a1* and *b1*, the intensities emitted and received by the second beam of light are denoted as *a2* and *b2*, and so on, up to the *n*th beam of light, with the intensities emitted and received as *a*. n b n The intensity difference between the emitted and received light sources is denoted as ξ = (a1 – b1) + (a2 – b2) + ... + (a n -b n );

[0069] like Figure 3 As shown, two sets of relatively arranged components are configured as shown in the figure. Based on the direction of the light source emission, they are divided into X and Y directions, forming a working unit, denoted as working unit A. The intensity difference between the light source emission and reception in the X direction is denoted as ξx = (a x1 -b x1 )+(a x2 -b x2 )+……+(a xn -b xn );

[0070] x1..........x n The subscript represents the 1st, 2nd, ... nth light source emission and reception point in the X direction, and only represents the numbering order.

[0071] The intensity difference between the light source emitted and received in the Y direction is denoted as ξy=(a y1 -b y1 )+(a y2 -b y2 )+……+(a yn -b ynThe intensity difference between the emitted and received light sources in working unit A is denoted as δ1 = ξx + ξy; the total intensity of the emitted light source is denoted as A1 = a x1 +a x2 +……+a y1 +a y2 +……+a yn .

[0072] In the formula, y1.........y n The subscript represents the 1st, 2nd, ... nth light source emission and reception point in the Y direction, and only represents the numbering order.

[0073] The light intensity loss rate of working unit A is η1 = δ1 / A1, and η1 is used to characterize the smoke and dust concentration. The larger η1 is, the greater the light intensity loss, the worse the light transmittance, and the higher the smoke and dust concentration.

[0074] like Figure 4 As shown, the three working units are arranged longitudinally. The light intensity loss rate of working unit B is η2 = δ2 / A2 (data processing method is the same as that of working unit A), and the light intensity loss rate of working unit C is η3 = δ3 / A3. In summary, the following parameters are obtained:

[0075] The light intensity difference δ1 of working unit A, and the light intensity loss rate η1=δ1 / A1;

[0076] The light intensity difference δ2 of working unit B, and the light intensity loss rate η2=δ2 / A2;

[0077] The light intensity difference δ3 of working unit C, and the light intensity loss rate η3=δ3 / A3;

[0078] Therefore, since the smoke concentration is positively correlated with the light intensity loss rate, under the established rules of this invention, the smoke concentration value is:

[0079] Working unit A, γ1=Kη1=Kδ1 / A1;

[0080] Working unit B, γ2=Kη1=Kδ2 / A2;

[0081] Working unit C, γ3=Kη3=Kδ3 / A3;

[0082] K is a constant, derived from practical applications and modified accordingly. The average smoke and dust concentration specified in this invention...

[0083] γ = (γ1 + γ2 + γ3) / 3 is used to guide the operating power of the dust removal fan and is one of the parameters that determine the intelligent adjustment of the air volume of the fan.

[0084] Smoke concentration gradient: β=M{[(γ1-γ2)] 2 +(γ2-γ3) 2 ] / 2} 1 / 2M is a constant derived from practical applications and has been modified accordingly.

[0085] The concentration gradient is expressed as the arithmetic square root of the concentration difference between the three working units. The smaller the concentration gradient, the stronger the diffusion ability of the smoke and dust; the larger the gradient, the weaker the diffusion ability of the smoke and dust.

[0086] The operating power of the dust collector fan is: W 开 =LW 额 *γ / β; L is a constant derived from practical applications and corrections.

[0087] (2) Intelligent control system for dust collector fan

[0088] The intelligent control system for dust collector fans receives two parameters from the front end: the average dust concentration and the dust concentration gradient. Based on these parameters, it sets the operating power to ensure high airflow for high-concentration dust and low airflow for low-concentration dust. Airflow is infinitely adjustable.

[0089] 4. Advantages Analysis:

[0090] (1) The size of the detection element can be flexibly designed: The polarized light dust concentration-gradient detector in this invention can detect dust concentration by light transmittance. The size of the detection element can be designed according to the size of the dust generation location. The length of the detection element can be increased or decreased as needed (the size of the dust generation source, such as the furnace outlet or the factory building).

[0091] (2) The detection area can be fully covered in three-dimensional space: Compared with ordinary dust concentration detectors that can only detect defects at a single point, the detector of the present invention can cover the entire space to be detected. For example, if it is necessary to monitor the dust concentration in the factory, the monitoring element needs to be made very long and the number of working units needs to be increased to achieve full coverage of the target area in three-dimensional space.

[0092] (3) The detected dust concentration values ​​are more meaningful and representative: The detector of this invention can detect the average dust concentration of the entire space. Compared with single-point detection, the values ​​detected by this invention are more meaningful and representative, and better represent the actual situation of dust in the space. The detector of this invention can also take the value of a beam of detection light to measure the dust concentration value at a single point. The detector of this invention is particularly advantageous for dust monitoring in large-space factory buildings. This invention can accurately detect the average dust concentration value in three-dimensional space, and the value is more meaningful; it can also achieve single-point detection.

[0093] (4) Measurement of Smoke Diffusion Gradient: The detector of this invention can simultaneously detect the concentration and diffusion gradient of smoke and dust, enabling the assessment of the diffusion capacity of smoke and dust. By measuring the smoke and dust concentration difference among the three working units, the concentration gradient of the smoke and dust is measured. This is particularly advantageous for monitoring smoke and dust sources. The concentration value and diffusion capacity of the smoke and dust can be obtained, allowing for corresponding measures to be taken and the appropriate airflow to be activated. This invention can be applied to smoke and dust sources, treating smoke and dust at the source, resulting in significant dust removal effects and preventing the smoke and dust from diffusing.

[0094] (5) Fast response speed: The detector of this invention measures the light intensity loss once every minute, detecting the light intensity increase (positive or negative) within 1 minute, that is, the detection frequency of the target is 1 minute. When smoke or dust occurs, the dust collector starts immediately. The response speed is fast. Especially when acting on the source of smoke or dust, it can start the dust collector in time and start the corresponding air volume as soon as the smoke or dust occurs.

[0095] (6) Polarized light source with strong anti-interference capability. Each working unit has a different polarization angle of the light source, with its own independent polarization angle. This can effectively resist external light source interference and mutual interference between light sources.

[0096] (7) Intelligent control: The dust collector's air volume intelligent control system can intelligently adjust the air volume according to actual needs, ensuring the dust removal effect while achieving intelligent, green and energy-saving operation.

[0097] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be included within the scope of protection of the present invention. Furthermore, all content not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. An intelligent dust monitoring and removal system, characterized in that: Includes a detector (1); the detector (1) is capable of detecting smoke concentration and diffusion gradient, and the detector (1) is mainly composed of a polarized light source (5) and a polarized light receiver (6); The polarized light source (5) is used to emit polarized light; The polarization receiver (6) is used to receive polarized light emitted from the polarization light source opposite to it; It also includes the source of smoke and dust (2), dust hood (3) and dust removal pipeline (4); The source of smoke and dust (2) is surrounded by the detector and is the source of smoke and dust. The detector (1) measures and analyzes the concentration and diffusion gradient data of the smoke and dust, and transmits the data to the system processor; The detector (1) transmits data to the system processor via wireless network. The processor sends instructions to the dust removal fan based on the data value to adjust the air volume of the dust removal fan. The dust is accurately removed according to the dust concentration and diffusion gradient. After passing through the dust removal hood (3) and dust removal pipeline (4), the dust enters the dust collector for subsequent purification. The detector (1) is set up with three working units, namely working unit A, working unit B and working unit C; The three work units are arranged vertically; Smoke concentration gradient: β=M{(γ1-γ2)} 2 +(γ2-γ3) 2 ] / 2} 1 / 2 M is a constant; γ1 is the dust concentration value corresponding to working unit A; γ2 is the dust concentration value corresponding to working unit B; γ3 is the dust concentration value corresponding to working unit C; The arithmetic square root of the concentration difference between the three working units is used to represent the concentration gradient. The smaller the concentration gradient, the stronger the diffusion ability of the smoke and dust; the larger the gradient, the weaker the diffusion ability of the smoke and dust. Dust collector fan operating power: W 开 =LW 额 *γ / β; L is a constant, W 额 This refers to the rated power of the dust collector fan. The average concentration of smoke and dust is specified as γ = (γ1 + γ2 + γ3) / 3.

2. The intelligent dust monitoring and removal system according to claim 1, characterized in that: The detector (1) is equipped with two sets of upright, oppositely arranged elements; according to the direction of the light source, it is divided into the X direction and the Y direction, forming a working unit.

3. The intelligent dust monitoring and removal system according to claim 2, characterized in that: The detector (1) is a polarized light dust concentration-gradient detector, which can detect dust concentration by light transmittance. The size of the detection working element can be designed according to the size of the dust generation location.

4. The design method of an intelligent monitoring and dust removal system according to claim 1, characterized in that: The intensity of the light emitted by the polarized light source (5) is denoted as a, and the intensity of the light received by the polarized light receiver after being obstructed by smoke and dust during propagation is denoted as b; the intensity of the first beam emitted and received is denoted as a1 and b1, the intensity of the second beam emitted and received is denoted as a2 and b2, ..., the intensity of the nth beam emitted and received is denoted as a n b n The intensity difference between the emitted and received light sources is denoted as ξ = (a1 – b1) + (a2 – b2) + ... + (a n - b n ); Two sets of components arranged opposite each other, divided into X and Y directions according to the direction of the light source, form a working unit, denoted as working unit A; The intensity difference between the light source emitted and received in the X direction is denoted as ξx = (a x1 – b x1 )+(a x2 – b x2 )+……+(a xn - b xn ); The intensity difference between the light source emitted and received in the Y direction is denoted as ξy = (a y1 – b y1 )+(a y2 – b y2 )+……+(a yn - b yn ); The intensity difference between the emitted and received light sources in working unit A is denoted as δ1 = ξx + ξy; the total intensity of the emitted light source is denoted as A1 = a x1 + a x2 +……+ a xn +a y1 + a y2 +……+ a yn ; Light intensity loss rate of working unit A η1=δ1 / A1; The larger η1 is, the greater the light intensity loss, the worse the light transmittance, and the higher the smoke and dust concentration; Light intensity loss rate of working unit B η2=δ2 / A2; Light intensity loss rate of working unit C η3=δ3 / A3; The following parameters were obtained: The light intensity difference δ1 of working unit A, and the light intensity loss rate η1 = δ1 / A1; The light intensity difference δ2 in working unit B, and the light intensity loss rate η2 = δ2 / A2; The light intensity difference δ3 of working unit C, and the light intensity loss rate η3 = δ3 / A3; Smoke concentration is positively correlated with light intensity loss rate. Smoke concentration value: Working unit A, γ1=Kη1=Kδ1 / A1; Working unit B, γ2=Kη1=Kδ2 / A2; Working unit C, γ3=Kη3=Kδ3 / A3; K is a constant; The average dust concentration γ = (γ1 + γ2 + γ3) / 3 is specified to guide the operating power of the dust removal fan and is one of the parameters that determine the intelligent adjustment of the air volume of the fan.

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