Industrial flue gas continuity detection equipment based on autonomous verification

Abstract

The invention relates to the technical field of flue gas collection and monitoring, in particular to industrial flue gas continuity detection equipment based on autonomous verification, which is provided with a flue gas collection box, an induction analysis module, a response module and a verification module, and flue gas in a chimney is introduced into a flue gas probe through a gas inlet channel; flue gas enters the flue gas probe through rotation of the spiral gas pushing rod, gas-solid gradual separation characteristic interval sections are screened through the induction analysis module according to flue gas temperature change conditions of different height points, and whether the spiral gas pushing rod is subjected to response adjustment or not and an adjustment mode is determined through the response module. The adjustment mode of the spiral gas pushing rod is verified through the verification module, and then response adjustment and verification optimization are carried out on the detection equipment according to the smoke characteristic difference of different height points in the chimney so as to reduce the blockage occurrence probability and improve the continuous detection stability of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of smoke collection and monitoring, and in particular to industrial smoke continuity detection equipment based on autonomous verification. Background Art

[0002] In the industrial production process, industrial flue gas emission monitoring is extremely important. Industrial flue gas continuity detection equipment has become a key equipment to ensure environmental compliance and production process optimization. Traditional industrial flue gas continuity detection equipment faces many challenges. Due to differences in factors such as the degree of fuel combustion in industrial production and the amount of flue gas generated, the position of the large-scale separation of gas and solid phases in the flue gas in the chimney will fluctuate. In the gas-solid two-phase flow environment, the gas and solid phases in the chimney produce violent turbulence and mixing under the action of the airflow, resulting in uneven and unstable flue gas temperature distribution, which brings great difficulties to the accurate detection of flue gas components and parameters. SO2 and NO in the sample gas x Gaseous pollutants such as sulfur dioxide and sulfur dioxide are easily lost due to temperature changes during transmission, and the heating effect will be significantly affected by the complex flow of gas and solid phases. In addition, the existing equipment lacks an autonomous calibration mechanism. During long-term operation, the operating status of the detection equipment is difficult to monitor and calibrate in real time, and it is impossible to ensure that the equipment is always in the best working condition. It is difficult to meet the needs of industrial production for high-precision and high-reliability flue gas detection. Therefore, the development of an industrial flue gas detection equipment that can be calibrated autonomously is of great practical significance.

[0003] For example, China Patent Publication No.: CN111912942A, the invention discloses an online monitoring system and monitoring method for furnace combustion flue gas, belonging to the field of flue gas monitoring, the system includes a sampling unit, a processing unit, a vacuum pump, an analysis unit, an analysis flow controller, a positive pressure gauge after the pump, a venting flow controller and an electronic control device. The vacuum pump is connected to the analysis unit through a pipeline. The positive pressure gauge after the pump is installed behind the air outlet of the vacuum pump, the analysis flow controller is installed on the pipeline at the air inlet of the analysis unit, and the air inlet of the venting flow controller is connected to the pipeline between the vacuum pump and the analysis unit. The electronic control device is electrically connected to the vacuum pump, the analysis flow controller, the positive pressure gauge after the pump and the venting flow controller respectively.

[0004] The prior art still has the following problems: The existing technology does not take into account the separation of gas and solid phases in the chimney, which causes large particles to settle due to inertia, while fine particles move with the gas phase. The complex distribution of particles at the probe location leads to frequent blockage of the sampling branch pipe and the probe filter element. The existing technology cannot adjust the response of the detection equipment and optimize the calibration to reduce the probability of blockage according to the differences in flue gas characteristics at different heights in the chimney, thereby affecting the continuity of the detection stability of the equipment. Summary of the invention

[0005] To this end, the present invention provides an industrial flue gas continuity detection device based on autonomous verification to overcome the problem that the prior art cannot adjust the detection device's response and optimize the verification to reduce the probability of blockage according to the differences in flue gas characteristics at different heights in the chimney.

[0006] To achieve the above object, the present invention provides an industrial smoke continuity detection device based on autonomous verification, comprising: A smoke collecting box is installed on the outer wall of the chimney, and comprises an air inlet channel and a smoke probe, so as to introduce the smoke in the chimney into the smoke probe through the air inlet channel, and a spiral air push rod is arranged in the air inlet channel, which can rotate to make the smoke enter the smoke probe; The sensing analysis module includes a plurality of temperature sensors arranged on the inner wall of the chimney along the height direction to obtain the flue gas temperature at different height points, and a screening unit to screen the gas-solid separation characteristic interval according to the flue gas temperature change at different height points; A response module, which is connected to the smoke collection box and the induction analysis module respectively, and is used to determine whether the spiral air push rod should be adjusted in response and determine the adjustment method according to the position distribution of the gas-solid separation characteristic interval segment; Wherein, the adjustment method includes periodically changing the rotation direction of the spiral propeller and setting a rotation pause period; The verification module is connected to the response module and the smoke sampling box respectively, and is used to obtain the operating electrical signals of the spiral air push rod at consecutive marking moments in time sequence, and verify the adjustment mode of the spiral air push rod based on the signal strength of the operating electrical signals.

[0007] Furthermore, the spiral thrust rod includes a spiral blade and a rotating rod driving the spiral blade to rotate, and the spiral blade is in contact with the inner wall of the air inlet passage.

[0008] Furthermore, the screening unit is used to determine the change of flue gas temperature at different heights, wherein: The screening unit is used to calculate the flue gas temperature difference between adjacent height points in the height dimension, construct a temperature difference fluctuation curve of the flue gas temperature difference changing with time, and determine the temperature difference and slope corresponding to several data points on the temperature difference fluctuation curve.

[0009] Furthermore, the screening unit is used to screen the gas-solid separation characteristic interval segment, wherein: The screening unit is used to calculate the Pearson coefficient of the temperature difference corresponding to a number of data points in time series on the temperature difference fluctuation curve after removing the dimension of the slope, screen out the temperature difference fluctuation curve whose Pearson coefficient meets the coefficient screening condition, and determine the gas-solid gradual separation characteristic interval according to the adjacent height points corresponding to the temperature difference fluctuation curve; The coefficient screening condition is that the Pearson coefficient exceeds a preset coefficient threshold.

[0010] Furthermore, the response module is used to determine the response adjustment of the spiral air push rod and determine the adjustment method based on the judgment result of the smoke collection box in the gas-solid gradual separation characteristic interval.

[0011] Further, the adjustment method includes the response module controlling the propeller to rotate in a first rotation direction in a plurality of operation cycles and in a second rotation direction in a single operation cycle; In which, a rotation pause period of at least one operation cycle is set when switching from rotating in the first rotation direction to rotating in the second rotation direction.

[0012] Furthermore, the first rotation direction is the direction in which the spiral air pushing rod causes smoke to enter the smoke probe, and the second rotation direction is opposite to the first rotation direction.

[0013] Furthermore, the verification module is also used to determine the marking time, wherein: The verification module is used to determine a single operation cycle in which the screw propeller rotates in the second rotation direction, and mark a number of moments at preset time intervals within the single operation cycle, and determine the marked moments as the marked moments.

[0014] Furthermore, the verification module is used to obtain the operating electrical signals of the screw thrust rod at several marking moments in a single operating cycle, and calculate the average signal strength of the operating electrical signals corresponding to the several marking moments.

[0015] Furthermore, the verification module is used to verify the adjustment mode of the screw propeller according to the comparison between the signal strength average value and the preset signal strength reference value, wherein: If the signal strength average value exceeds a preset signal strength reference value, the verification module controls the screw air thrust rod to extend the operating time of rotating in the second rotation direction, and the operating time is positively correlated with the signal strength average value.

[0016] Compared with the prior art, the beneficial effect of the present invention lies in that a smoke sampling box, a sensing and analysis module, a response module and a verification module are provided in the present invention, the smoke in the chimney is introduced into the smoke gas probe through the air inlet channel, the smoke enters the smoke gas probe through the rotation of the spiral air push rod, the gas-solid separation characteristic interval is screened according to the smoke temperature change at different height points through the sensing and analysis module, the spiral air push rod is determined whether to respond and adjust and the adjustment method is determined through the response module, and the adjustment method of the spiral air push rod is verified through the verification module, thereby realizing the response adjustment and verification optimization of the detection equipment according to the differences in smoke characteristics at different height points in the chimney to reduce the probability of blockage and improve the continuity detection stability of the equipment.

[0017] Furthermore, the present invention analyzes the flue gas temperature difference and slope at adjacent height points and combines it with Pearson coefficient screening to accurately determine the specific position of the gas-solid two-phase separation in the chimney that is difficult to accurately grasp. When the flue gas temperature difference at adjacent height points in the height dimension is smaller and the negative value of the slope is larger, it means that there are special changes in the heat exchange and flow characteristics of the gas-solid two-phase in this interval. By accurately identifying areas with special phenomena, the targetedness of equipment adjustment is improved.

[0018] Furthermore, the present invention controls the spiral air push rod to rotate in a first rotation direction in several operating cycles through a response module, so that the flue gas can enter the flue gas probe normally to ensure sampling. In a single operating cycle, it rotates in a second rotation direction to generate a reverse thrust, which pushes out large particles that may be accumulated in the probe inlet and the sampling branch pipeline in reverse, avoiding blockage caused by continuous accumulation of particles. A rotation pause period is set in at least one operating cycle to allow the airflow and particles to have a brief static state. During the pause, particles originally attached to the pipe wall or the filter element may fall off due to factors such as gravity. Reverse rotation is then performed, which is more conducive to cleaning out these residual particles and further reducing the risk of blockage. Furthermore, according to the differences in flue gas characteristics at different heights in the chimney, the detection equipment can be adjusted in response and optimized in calibration to reduce the probability of blockage and improve the continuity of the detection stability of the equipment.

[0019] Furthermore, the present invention uses a verification module to take a single operating cycle of the spiral air push rod rotating in the second rotation direction as a research object, in which several moments are marked at preset time intervals as marking moments, and by obtaining the operating electrical signals at these marking moments, the operating status of the spiral air push rod in the operation process of cleaning large particles can be understood in real time and accurately, and by calculating the signal strength average of the operating electrical signal corresponding to the marking moment, the operating status of the equipment can be further quantified, and the degree of additional resistance encountered by the spiral air push rod during operation can be quantified, thereby more timely and accurately capturing subtle abnormalities in the operation of the equipment.

[0020] Furthermore, under the condition that the signal strength average value exceeds the preset reference value, the present invention indicates that the spiral air push rod encounters greater resistance during operation because a large number of large particles are accumulated in the sampling branch pipeline or the probe filter element, resulting in an increase in the operating load of the equipment. The verification module controls the spiral air push rod to extend the operating time of rotating in the second rotation direction, so that the blocked part can be cleaned more fully and the accumulated particles can be cleaned in time, which can avoid equipment failure caused by further aggravation of blockage. Furthermore, according to the differences in flue gas characteristics at different heights in the chimney, the detection equipment can be adjusted in response and the verification is optimized to reduce the probability of blockage and improve the continuity detection stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a simplified structural diagram of a smoke collecting box according to an embodiment of the present invention; Figure 2 This is a device block diagram of an industrial smoke continuity detection device based on autonomous verification according to an embodiment of the present invention; Figure 3 A logic flow chart of the response module of the embodiment of the present invention determining whether the spiral propeller rod performs response adjustment; Figure 4 A logic flow chart of verification performed by the verification module according to an embodiment of the present invention; In the figure, 1-intake channel, 2-smoke probe, 3-spiral push rod, 31-spiral blade, 32-rotating rod. DETAILED DESCRIPTION

[0022] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0024] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0025] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 as well as Figure 2 As shown, Figure 1 This is a simplified structural diagram of a smoke collecting box according to an embodiment of the present invention. Figure 2 The device block diagram of the industrial smoke continuity detection device based on autonomous verification according to an embodiment of the present invention is as follows. The industrial smoke continuity detection device based on autonomous verification according to the present invention comprises: A smoke collecting box is installed on the outer wall of the chimney, and comprises an air inlet channel 1 and a smoke probe 2, so as to introduce the smoke in the chimney into the smoke probe 2 through the air inlet channel 1. A spiral air push rod 3 is arranged in the air inlet channel, which rotates to allow the smoke to enter the smoke probe 2; Specifically, the present invention does not limit the specific structure of the smoke probe, and the interior thereof includes components such as a ceramic filter element for filtering dust in the smoke. The smoke probe is widely used in the field of smoke detection and will not be described in detail here.

[0027] The sensing analysis module includes a plurality of temperature sensors arranged on the inner wall of the chimney along the height direction to obtain the flue gas temperature at different height points, and a screening unit to screen the gas-solid separation characteristic interval according to the flue gas temperature change at different height points; Specifically, the present invention does not limit the spacing distance of the temperature sensors along the height direction. In order to ensure that the temperature sensors have the value of comparing the flue gas temperature in the chimney in intervals, it should be avoided that the temperature comparison difference is too large due to the spacing distance being set too large, and the temperature distinction is not obvious due to the spacing distance being set too small. The spacing distance of the temperature sensors along the height direction can be set in the range of [2, 5], with the interval unit being m. Preferably, the spacing distance of the temperature sensors along the height direction can be 3m.

[0028] Specifically, the present invention does not limit the specific structure of the temperature sensor, which may be an infrared temperature monitoring sensor, which is a prior art and will not be described in detail here.

[0029] A response module, which is connected to the smoke collection box and the induction analysis module respectively, and is used to determine whether the spiral air push rod 3 is to be adjusted in response and to determine the adjustment method according to the position distribution of the gas-solid separation characteristic interval; Wherein, the adjustment method includes periodically changing the rotation direction of the spiral air propulsion rod 3 and setting a rotation pause period; Specifically, the response module in the present invention can be composed of a microprocessor, a data storage module and a communication interface. The microprocessor is responsible for processing and calculating various types of data; the data storage module records historical data and preset parameters; the communication interface ensures stable data interaction with the smoke sampling box and the sensing analysis module, which will not be repeated here.

[0030] The verification module is connected to the response module and the smoke sampling box respectively, and is used to obtain the operating electrical signals of the spiral air pushing rod 3 at consecutive marking moments in time sequence, and verify the adjustment mode of the spiral air pushing rod 3 based on the signal strength of the operating electrical signals.

[0031] Specifically, the operating electrical signal in the present invention may be a current signal or a voltage signal. Preferably, a signal category of an operating electrical signal is provided herein. Exemplarily, the operating electrical signal may be a current signal.

[0032] Specifically, the present invention does not limit the specific structure of the verification module, which includes high-sensitivity current and voltage sensors that can capture the current and voltage signals of the motor when it is running in real time and convert them into electrical signal data that can be analyzed, a signal processor responsible for transmitting the electrical signal data, and a signal processor, which will not be repeated here.

[0033] For more details, please refer to Figure 1 As shown, the spiral thrust rod 3 includes a spiral blade 31 and a rotating rod 32 driving the spiral blade 31 to rotate, and the spiral blade 31 is in contact with the inner wall of the air inlet passage 1.

[0034] In practice, the rotating rod 32 driving the spiral blade 31 to rotate is connected to a motor, and the motor is connected to the rotating rod 32 via a coupling to drive the rotating rod 32 to rotate. This is a prior art and will not be described in detail here.

[0035] Specifically, the screening unit is used to determine the change of flue gas temperature at different heights, wherein: The screening unit is used to calculate the flue gas temperature difference between adjacent height points in the height dimension, construct a temperature difference fluctuation curve of the flue gas temperature difference changing with time, and determine the temperature difference and slope corresponding to several data points on the temperature difference fluctuation curve.

[0036] Specifically, the screening unit in the present invention can use the numerical differentiation method to determine the slope corresponding to several data points on the temperature difference fluctuation curve. The numerical differentiation method approximates the derivative by finite differences to obtain the slope of the curve. This method is widely used in the calculation of the slope of the curve and will not be repeated here.

[0037] Specifically, the screening unit is used to screen the gas-solid separation characteristic interval segment, wherein: The screening unit is used to calculate the Pearson coefficient of the temperature difference corresponding to a number of data points in time series on the temperature difference fluctuation curve after removing the dimension of the slope, screen out the temperature difference fluctuation curve whose Pearson coefficient meets the coefficient screening condition, and determine the gas-solid gradual separation characteristic interval according to the adjacent height points corresponding to the temperature difference fluctuation curve; The coefficient screening condition is that the Pearson coefficient exceeds a preset coefficient threshold.

[0038] Exemplarily, the Pearson coefficient calculation process in the present invention can be: pre-obtaining the temperature difference values ​​at 5 time moments in time series on the temperature difference fluctuation curve, which are 1.8°C, 1.7°C, 1.5°C, 1.4°C, and 1.1°C respectively, and the slopes corresponding to the data points at these 5 time moments are -0.13, -0.17, -0.23, -0.26, and -0.34 respectively. By calculating the average value of the temperature difference at 5 time moments and the average value of the slope, the calculation formula of the Pearson coefficient can be used to calculate the Pearson coefficient after removing the dimension of the temperature difference and the slope at 5 time moments in time series on the temperature difference fluctuation curve. The calculation formula of the Pearson coefficient is a prior art and will not be repeated here.

[0039] In implementation, the preset coefficient threshold can be obtained based on historical experimental data, and the temperature difference and slope of each interval section of the chimney at several times under the same operating conditions are pre-calculated, and the Pearson coefficient average of several interval sections is calculated, and the obtained Pearson coefficient average is determined as the preset coefficient threshold. Preferably, a value of the coefficient threshold is provided here, and the preset coefficient threshold is 0.9.

[0040] It will be understood by those skilled in the art that the separation interval of the gas-solid phases in the chimney will cause large particles to settle due to inertia, while fine particles will move with the gas phase. This separation process will affect the heat exchange of flue gas at different heights, thereby causing changes in the flue gas temperature distribution. When the gas-solid separation phenomenon occurs, the difference in particle distribution at different heights causes the heat transfer process to change, causing the flue gas temperature difference at adjacent heights to gradually decrease. At the same time, the changing trend of this temperature difference will be manifested on the temperature difference fluctuation curve as a gradually increasing negative slope (i.e., the smaller the slope). In the gas-solid separation area, due to the strong linear relationship between the temperature difference and the slope, their Pearson coefficients will show a specific range of values, thereby accurately screening out the separation interval of the gas-solid phases.

[0041] Specifically, the present invention analyzes the flue gas temperature difference and slope at adjacent height points and combines it with Pearson coefficient screening to accurately determine the specific position of the gas-solid two-phase separation in the chimney that is difficult to accurately grasp. When the flue gas temperature difference at adjacent height points in the height dimension is smaller and the negative value of the slope is larger, it means that there are special changes in the heat exchange and flow characteristics of the gas-solid two-phase in this interval. By accurately identifying areas with special phenomena, the targetedness of equipment adjustment is improved.

[0042] Specifically, see Figure 3 As shown, it is a logic flow chart of the response module of the embodiment of the present invention for determining whether the spiral push rod is to be adjusted in response, and the response module is used to determine whether the spiral push rod is to be adjusted in response and determine the adjustment method based on the judgment result of the smoke collection box in the gas-solid gradual separation characteristic interval; The response module does not make response adjustments to the spiral air push rod based on the determination result that the smoke collection box is not within the gas-solid gradual separation characteristic interval; During implementation, the spiral air pusher rod guides the flue gas in the chimney into the flue gas probe 2 at a preset rotation speed at a uniform speed under normal working conditions, so as to continuously obtain sample gas of the flue gas, and transport the sample gas to the flue gas analyzer through the sampling pipeline to calculate the content concentration values ​​of sulfur dioxide, nitrogen oxides, etc. If the smoke sampling box is not in the gas-solid separation characteristic interval, the spiral air pusher rod maintains the preset rotation speed without changing the rotation speed and does not set a rotation pause period. The rotation speed of the spiral air pusher rod under normal working conditions is 60 rpm-90 rpm.

[0043] Specifically, the adjustment method includes the response module controlling the propeller to rotate in a first rotation direction in a plurality of operation cycles and in a second rotation direction in a single operation cycle; In which, a rotation pause period of at least one operation cycle is set when switching from rotating in the first rotation direction to rotating in the second rotation direction.

[0044] In implementation, the number of operating cycles in which the spiral air push rod rotates in the first rotation direction can be set by technical personnel in this field according to monitoring requirements. Too many operating cycles in which the spiral air push rod rotates in the first rotation direction may cause large particles of dust to enter the air intake channel 1 and block the air intake channel 1, thereby affecting the continuity and accuracy of the smoke detection. Too few operating cycles in which the spiral air push rod rotates in the first rotation direction may cause the timeliness of the smoke detection to fail to be met. The number of operating cycles in which the spiral air push rod rotates in the first rotation direction can be set in the range of [3, 5]. Preferably, the number of operating cycles in which the spiral air push rod rotates in the first rotation direction is set to 5.

[0045] Specifically, if the duration of an operation cycle in the present invention is too long, a large amount of dust will accumulate and enter the flue gas probe 2. The value range of the duration of an operation cycle can be [5,20], and the interval unit is min. Preferably, the duration of an operation cycle is set to 8 minutes.

[0046] Specifically, the first rotation direction is the direction in which the spiral air pushing rod causes the smoke to enter the smoke probe 2, and the second rotation direction is opposite to the first rotation direction.

[0047] It is understandable that in the gas-solid two-phase flow in the chimney, there is a phenomenon in which large particles settle due to inertia and fine particles move with the gas phase in the gas-solid separation characteristic interval. This will make the particle distribution at the probe location complex and easily cause blockage of the sampling branch pipeline and the probe filter element. If the smoke sampling box is in the gas-solid separation characteristic interval, it means that there is a high risk of blockage. At this time, it is necessary to respond and adjust the spiral air push rod to ensure the normal progress of smoke sampling. Under normal circumstances, the spiral air push rod rotates in a first rotation direction, and uses the propulsion of the spiral blades 31 to form a directional airflow in the air inlet channel 1, and stably introduces the smoke in the chimney into the smoke probe 2, thereby realizing the collection of smoke. When the spiral air push rod rotates in the second rotation direction, a reverse thrust will be generated. In the gas-solid separation characteristic interval, due to the complex particle distribution, large particles may accumulate in the air inlet channel 1. The reverse rotation can push these accumulated large particles backward to prevent them from further accumulation and blockage, thereby playing a role in cleaning and unblocking.

[0048] Specifically, the present invention controls the spiral air push rod to rotate in a first rotation direction in several operating cycles through a response module, so that the flue gas can enter the flue gas probe 2 normally to ensure the sampling. In a single operating cycle, it rotates in the second rotation direction to generate a reverse thrust, which pushes out large particles that may be accumulated in the probe inlet and the sampling branch pipeline in reverse, so as to avoid blockage caused by continuous accumulation of particles. A rotation pause period is set in at least one operating cycle to allow the airflow and particles to have a brief static state. During the pause, particles originally attached to the pipe wall or the filter element may fall off due to factors such as gravity, and then reverse rotation is performed, which is more conducive to cleaning out these residual particles and further reducing the risk of blockage. Furthermore, according to the differences in flue gas characteristics at different heights in the chimney, the detection equipment is adjusted in response and optimized in calibration to reduce the probability of blockage and improve the continuous detection stability of the equipment.

[0049] Specifically, the verification module is also used to determine the marking time, wherein: The verification module is used to determine a single operation cycle in which the screw propeller rotates in the second rotation direction, and mark a number of moments at preset time intervals within the single operation cycle, and determine the marked moments as the marked moments.

[0050] In implementation, it is necessary to select several detection moments of the current signal within the cycle length of an operation cycle. The value range of the preset time interval can be [30, 60], and the interval unit is s. Preferably, for an operation cycle with a cycle length of 8 minutes, the value of the preset time interval can be set to 40s.

[0051] Specifically, the verification module is used to obtain the operating electrical signals of the screw thrust rod at several marking moments in a single operating cycle, and calculate the average signal strength of the operating electrical signals corresponding to the several marking moments.

[0052] Specifically, a single operating cycle in which the spiral air push rod rotates in the second rotation direction is selected as the research object because the rotation in the second rotation direction has the function of cleaning large particles in the channel. The spiral air push rod will generate electrical signals related to its own operating status during operation. The characteristics of these electrical signals will change with the change of the load of the spiral air push rod. Obtaining the operating electrical signals at several marked moments in a single operating cycle can comprehensively reflect the operating conditions of the spiral air push rod in the entire cleaning process. Calculating the average signal strength of the operating electrical signals corresponding to these marked moments is to obtain a quantitative indicator that can represent the overall operating status of the spiral air push rod in the operating cycle. If the spiral air push rod encounters greater resistance, the motor needs to output more power, which will increase the intensity of the operating electrical signal and the average signal strength will also increase accordingly; conversely, if the operation is smooth, the average value will be within the normal range.

[0053] Specifically, the present invention uses a verification module to take a single operating cycle of the spiral air push rod rotating in the second rotation direction as a research object, in which several moments are marked at preset time intervals as marking moments, and by obtaining the operating electrical signals at these marking moments, the operating status of the spiral air push rod in the operation process of cleaning large particles can be understood in real time and accurately, and by calculating the signal strength average of the operating electrical signal corresponding to the marking moment, the operating status of the equipment can be further quantified, and the degree of additional resistance encountered by the spiral air push rod during operation can be quantified, thereby capturing subtle abnormalities in the operation of the equipment more timely and accurately.

[0054] Specifically, see Figure 4 As shown, it is a logic flow chart of the verification module of the embodiment of the present invention, wherein the verification module is used to verify the adjustment mode of the screw propeller according to the comparison between the signal strength average value and the preset signal strength reference value, wherein: If the signal strength average value does not exceed the preset signal strength reference value, the verification module does not verify the adjustment method of the screw push rod; If the signal strength average value exceeds a preset signal strength reference value, the verification module controls the screw air thrust rod to extend the operating time of rotating in the second rotation direction, and the operating time is positively correlated with the signal strength average value.

[0055] Specifically, the present invention can set the preset signal strength reference value Rm according to the following experimental data;

[0056] According to the above experimental data, the signal strength reference value can be set according to the average value of the experimental results of 10 experiments. The average value of the experimental results is calculated to be 142.92mA. Preferably, the signal strength reference value Rm is set to 143mA.

[0057] In implementation, the operating time of the spiral air thrust rod rotating in the second rotation direction is controlled according to the signal strength average value of the current signal. For example, to ensure that the adjusted operating time of the spiral air thrust rod rotating in the second rotation direction meets the actual cleaning requirements, the adjusted operating time should not be too large to avoid affecting the real-time performance of the smoke detection. The dimensionless difference Rc between the actual signal strength average value and the signal strength reference value can be calculated in advance. The operating time t=[(Rc / Rm)+1]×t0, wherein t0 is the duration of the operating cycle of the spiral air thrust rod rotating in the second rotation direction.

[0058] Specifically, under the condition that the average signal strength value exceeds the preset reference value, the present invention indicates that the spiral air push rod encounters greater resistance during operation because a large number of large particles are accumulated in the sampling branch pipeline or the probe filter element, which leads to an increase in the operating load of the equipment. The verification module controls the spiral air push rod to extend the operating time of rotating in the second rotation direction, so that the blocked part can be cleaned more fully and the accumulated particles can be cleaned in time, which can avoid equipment failure caused by further aggravation of blockage. Furthermore, according to the differences in flue gas characteristics at different heights in the chimney, the detection equipment can be responded and adjusted and the verification is optimized to reduce the probability of blockage and improve the continuity detection stability of the equipment.

[0059] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An industrial flue gas continuity detection device based on autonomous verification, characterized in that: include: A smoke collecting box is installed on the outer wall of the chimney, and comprises an air inlet channel and a smoke probe, so as to introduce the smoke in the chimney into the smoke probe through the air inlet channel, and a spiral air push rod is arranged in the air inlet channel, which can rotate to make the smoke enter the smoke probe; The sensing analysis module includes a plurality of temperature sensors arranged on the inner wall of the chimney along the height direction to obtain the flue gas temperature at different height points, and a screening unit to screen the gas-solid separation characteristic interval according to the flue gas temperature change at different height points; A response module, which is connected to the smoke collection box and the induction analysis module respectively, and is used to determine whether the spiral air push rod should be adjusted in response and determine the adjustment method according to the position distribution of the gas-solid separation characteristic interval segment; Wherein, the adjustment method includes periodically changing the rotation direction of the spiral propeller and setting a rotation pause period; The verification module is connected to the response module and the smoke sampling box respectively, and is used to obtain the operating electrical signals of the spiral air push rod at consecutive marking moments in time sequence, and verify the adjustment mode of the spiral air push rod based on the signal strength of the operating electrical signals.

2. The industrial smoke continuity detection device based on autonomous verification according to claim 1 is characterized in that: The spiral thrust rod comprises a spiral blade and a rotating rod driving the spiral blade to rotate, and the spiral blade is in contact with the inner wall of the air inlet passage.

3. The industrial smoke continuity detection device based on autonomous verification according to claim 1 is characterized in that: The screening unit is used to determine the change of flue gas temperature at different heights, wherein: The screening unit is used to calculate the flue gas temperature difference between adjacent height points in the height dimension, construct a temperature difference fluctuation curve of the flue gas temperature difference changing with time, and determine the temperature difference and slope corresponding to several data points on the temperature difference fluctuation curve.

4. The industrial smoke continuity detection device based on autonomous verification according to claim 3 is characterized in that: The screening unit is used to screen the gas-solid separation characteristic interval segment, wherein: The screening unit is used to calculate the Pearson coefficient of the temperature difference corresponding to a number of data points in time series on the temperature difference fluctuation curve after removing the dimension of the slope, screen out the temperature difference fluctuation curve whose Pearson coefficient meets the coefficient screening condition, and determine the gas-solid gradual separation characteristic interval according to the adjacent height points corresponding to the temperature difference fluctuation curve; The coefficient screening condition is that the Pearson coefficient exceeds a preset coefficient threshold.

5. The industrial smoke continuity detection device based on autonomous verification according to claim 4 is characterized in that: The response module is used to determine the response adjustment of the spiral air push rod and determine the adjustment method based on the judgment result of the smoke collection box in the gas-solid gradual separation characteristic interval.

6. The industrial smoke continuity detection device based on autonomous verification according to claim 5 is characterized in that: The adjustment method includes the response module controlling the propeller to rotate in a first rotation direction in a plurality of operation cycles and in a second rotation direction in a single operation cycle; In which, a rotation pause period of at least one operation cycle is set when switching from rotating in the first rotation direction to rotating in the second rotation direction.

7. The industrial smoke continuity detection device based on autonomous verification according to claim 6 is characterized in that: The first rotation direction is the direction in which the spiral air pushing rod causes smoke to enter the smoke probe, and the second rotation direction is opposite to the first rotation direction.

8. The industrial smoke continuity detection device based on autonomous verification according to claim 6 is characterized in that: The verification module is also used to determine the marking time, wherein: The verification module is used to determine a single operation cycle in which the screw propeller rotates in the second rotation direction, and mark a number of moments at preset time intervals within the single operation cycle, and determine the marked moments as the marked moments.

9. The industrial smoke continuity detection device based on autonomous verification according to claim 8 is characterized in that: The verification module is used to obtain the operating electrical signals of the screw thrust rod at several marking moments in a single operating cycle, and calculate the average signal strength of the operating electrical signals corresponding to the several marking moments.

10. The industrial smoke continuity detection device based on autonomous verification according to claim 9 is characterized in that: The verification module is used to verify the adjustment mode of the screw propeller according to the comparison between the signal strength average value and the preset signal strength reference value, wherein: If the signal strength average value exceeds a preset signal strength reference value, the verification module controls the screw air thrust rod to extend the operating time of rotating in the second rotation direction, and the operating time is positively correlated with the signal strength average value.

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