Fault detection method and apparatus, storage medium, and electronic device

Abstract

A fault detection method and apparatus (300), a storage medium, and an electronic device, relating to the field of positive-pressure dense phase pneumatic conveying. The method comprises: determining operating state information of a positive-pressure dense-phase pneumatic conveying system (200), wherein the operating state information comprises at least one of the total quantity of ash residues generated by coal combustion in a power plant, the equivalent length of a conveying pipe segment, the design conveying capacity, the ash-air ratio, the mass flow rate of conveying air, the volume flow rate of the conveying air in a standard state, the air-ash mixture temperature at a starting section of a conveying pipe, the conveying speed in a pneumatic ash conveying pipe, the diameter of the pneumatic ash conveying pipe, the pressure loss, the volume of an airlock valve, the volume of a bin pump, the free air flow rate of an air compressor, the standard volume flow rate of the air compressor, the total air consumption of an air compressor system, the compressed air flow velocity, the inner diameter of a compressed air pipe, and the pressure loss of the compressed air pipe; and on the basis of the operating state information, determining a fault area of the positive-pressure dense-phase pneumatic conveying system (200). The method can improve fault detection efficiency of the positive-pressure dense-phase pneumatic conveying system (200).

Description

Fault detection method, device, storage medium and electronic equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on December 25, 2023, with application number 202311799281.7 and titled “Fault Detection Method, Device, Storage Medium and Electronic Device,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of positive-pressure dense-phase pneumatic conveying, and in particular to a fault detection method, device, storage medium, and electronic equipment. Background Art

[0004] The related positive pressure dense phase pneumatic conveying system lacks a standardized fault detection method, resulting in the inability to accurately analyze the cause of the fault once a fault occurs in the actual operation of the positive pressure dense phase pneumatic conveying system, thus posing a risk to safe production.

[0005] Summary of the Invention

[0006] To overcome the problems existing in the related art, the present disclosure provides a fault detection method, device, storage medium and electronic device.

[0007] According to a first aspect of an embodiment of the present disclosure, a fault detection method is provided, including:

[0008] Determining operating status information of the positive-pressure dense-phase pneumatic conveying system, the operating status information including at least one of the following: the total amount of ash and slag generated by coal combustion in the electric field, the equivalent length of the conveying pipe section, the designed conveying output, the ash-to-gas ratio, the conveying air mass flow rate, the conveying air volume flow rate under standard conditions, the conveying air volume flow rate under working conditions, the gas-ash mixing temperature at the starting section of the conveying pipeline, the conveying speed of the pneumatic ash conveying pipeline, the pneumatic ash conveying pipe diameter, the pipeline friction resistance coefficient, the pressure loss, the air lock valve volume, the silo pump volume, the air compressor free air flow rate, the air compressor standard volume flow rate, the total air consumption of the air compressor system, the compressed air flow rate, the inner diameter of the compressed air pipe, and the compressed air pipe pressure loss;

[0009] A fault area of ​​the positive-pressure dense-phase pneumatic conveying system is determined according to the operating status information.

[0010] Optionally, determining the operating status information of the positive-pressure dense-phase pneumatic conveying system includes:

[0011] In the case where the operating status information includes the total amount of ash and slag generated by coal combustion in the electric field, the total amount of ash and slag generated by coal combustion in the electric field is calculated using a first calculation formula, and the first calculation formula is: G hz=B m ×(A ar / 100+Q net ×q4 / 3387)

[0012] Among them, G hz is the total amount of ash produced by coal combustion in the electric field, B m A is the actual coal consumption of each boiler under the maximum continuous evaporation condition. ar is the basic ash content of coal combustion, Q net is the basic low calorific value of the coal received, and q4 is the incomplete combustion loss of the boiler machinery.

[0013] Optionally, the method further includes:

[0014] Determining the amount of ash generated by the coal combustion in the electric field according to the product of the total amount of ash residue generated by the coal combustion in the electric field and the fly ash distribution rate of the coal combustion in the electric field;

[0015] The amount of slag generated by the coal burning in the electric field is determined according to the product of the total amount of ash and slag generated by the coal burning in the electric field and the slag distribution rate of the coal burning in the electric field.

[0016] Optionally, determining the operating status information of the positive-pressure dense-phase pneumatic conveying system includes:

[0017] In the case where the operation status information includes the equivalent length of the transmission pipe section, the equivalent length of the transmission pipe section is calculated using a second calculation formula, and the second calculation formula is: L e =L+H+∑nL r

[0018] Among them, L e is the equivalent length of the transport pipe section, L is the total length of the horizontal transport pipe section, H is the total length of the vertical transport pipe section, n is the number of various pipeline accessories, L r is the equivalent length of various pipe accessories;

[0019] In the case where the operating status information includes the transport design output, the transport design output is determined according to the product of the amount of ash generated by coal combustion in the electric field and the design margin coefficient;

[0020] In the case where the operating status information includes the ash-to-gas ratio, the ash-to-gas ratio is calculated using a third calculation formula. The ash-to-gas ratio is the ratio of the conveyed material amount to the conveyed gas consumption. The third calculation formula is:

[0021] Wherein, μ is the ash-to-gas ratio, β is the fly ash characteristic value, L e is the equivalent length of the transport pipe section.

[0022] Optionally, determining the operating status information of the positive-pressure dense-phase pneumatic conveying system includes:

[0023] When the operating status information includes the conveying air mass flow rate and the conveying air volume flow rate under the standard state, the conveying air mass flow rate and the conveying air volume flow rate under the standard state are determined according to the ratio between the conveying design output and the ash-to-gas ratio.

[0024] Optionally, determining the operating status information of the positive-pressure dense-phase pneumatic conveying system includes:

[0025] When the operating state information includes the conveying air volume flow rate in the working state, the conveying air volume flow rate in the working state is calculated by a fourth calculation formula, and the fourth calculation formula is: q v =12.89×G / μ×P0 / P×(273+t) / 273

[0026] Among them, q v is the conveying air volume flow rate under the working state, G is the conveying design output, μ is the ash-to-gas ratio, P0 is the standard atmospheric pressure, P is the absolute pressure at any point in the pipeline, and t is the temperature at any point in the pipeline;

[0027] In the case where the operating status information includes the gas-ash mixture temperature at the starting section of the conveying pipeline, the gas-ash mixture temperature at the starting section of the conveying pipeline is calculated using the fifth calculation formula, which is: m =(G×c h ×t h +G ma ×c a ×t a ) / (G×c h +G ma ×c a )

[0028] Among them, t m is the gas-ash mixture temperature at the starting section of the conveying pipeline, G is the conveying design output, G ma is the transported air mass flow rate, c h is the specific heat capacity of dry ash, c a is the specific heat capacity of air, t h is the boiler exhaust temperature or ash particle temperature, t a To deliver compressed air temperature;

[0029] When the operation status information includes the conveying speed of the pneumatic ash conveying pipeline, the conveying speed of the pneumatic ash conveying pipeline is calculated by the sixth calculation formula, which is: v = 0.0212 × q v / D 2

[0030] Among them, v is the conveying speed of the pneumatic ash conveying pipeline, D is the diameter of the pneumatic ash conveying pipeline, q V Calculates the air volume flow rate at the duct point.

[0031] Optionally, determining the operating status information of the positive-pressure dense-phase pneumatic conveying system includes:

[0032] In the case where the operating status information includes the diameter of the pneumatic ash conveying pipe, the diameter of the pneumatic ash conveying pipe is calculated using the seventh calculation formula, which is:

[0033] Among them, D is the diameter of the pneumatic ash conveying pipe, q V is the air volume flow rate at the calculation point of the pipeline, and v is the conveying speed of the pneumatic ash conveying pipeline;

[0034] In the case where the operating status information includes the pipeline friction resistance coefficient, the pipeline friction resistance coefficient is calculated using an eighth calculation formula, which is:

[0035] Wherein, λ is the friction coefficient of the pipeline, d is the inner diameter of the calculated pipeline, and ε is the average absolute roughness of the inner wall of the pipeline;

[0036] In the case where the operating state information includes the pressure loss, the pressure loss is calculated using a ninth calculation formula, which is: ΔP = ∑ΔP L +△P P +△P0+△P f

[0037] Among them, △P is the pressure loss, △P L is the pipeline pressure loss, △P P is the equipment pressure loss, △P0 is the storage pressure loss, △P f is the pressure loss of the bag filter.

[0038] Optionally, determining the operating status information of the positive-pressure dense-phase pneumatic conveying system includes:

[0039] In the case where the operating status information includes the air lock valve volume, the multiple air lock valve volumes are calculated using the tenth calculation formula, which is: V=G×[t+0.4t(n-1)] / 3600×ρ d ×k×E×n

[0040] Wherein, V is the volume of the air lock valve, G is the designed delivery output, ρ dis the ash bulk density, k is the ash bulk density coefficient in the gasification state, t is the opening time of the gas lock bottom valve, E is the system efficiency coefficient, and n is the number of gas lock valves discharging simultaneously;

[0041] In the case where the operating status information includes the silo pump volume, the silo pump volume is calculated using the eleventh calculation formula, which is:

[0042] Among them, V P is the volume of the silo pump, G1 is the output of a single silo pump, ψ is the silo pump filling coefficient, ρ h is the bulk density of ash, t1 is the time required to fill a bin pump, and t2 is the time required to blow a bin pump;

[0043] Alternatively, the silo pump volume is calculated using the twelfth calculation formula, which is:

[0044] Among them, G2 is the output of the double-bin pump, and t3 is the pressure recovery time of the bin pump.

[0045] Optionally, determining the operating status information of the positive-pressure dense-phase pneumatic conveying system includes:

[0046] In the case where the operating status information includes the free air flow of the air compressor, the free air flow of the air compressor is calculated using the thirteenth calculation formula, which is: q f =P w / P×(273+t / 273+t0)×q e

[0047] Among them, q f is the free air flow of the air compressor, q e P is the volume flow rate of compressed air at the gas point, w is the compressed air working pressure at the gas consumption point, P is the compressed air working pressure at the gas consumption point, t0 is the air temperature at the air compressor outlet, and t is the working environment temperature of the air compressor;

[0048] In the case where the operating status information includes the air compressor standard state volume flow rate, the air compressor standard state volume flow rate is calculated using the fourteenth calculation formula, which is: q N =P / P0×(273.073+t)×q f

[0049] Among them, q N is the standard volume flow rate of the air compressor, q f is the free air flow of the air compressor, P0 is the standard atmospheric pressure, P is the working environment pressure of the air compressor, and t is the working environment temperature of the air compressor;

[0050] In the case where the operating status information includes the total gas consumption of the air compressor system, the total gas consumption of the air compressor system is determined based on the sum of the total air consumption of the unit instruments, the total compressed air consumption for ash removal and transportation, and the gas consumption required by other compressed air users;

[0051] Alternatively, the total gas consumption of the air compressor system is determined according to the sum of the stable gas volume when the ash removal system is working and the fluctuating gas volume when the ash removal system is working;

[0052] In a case where the operating status information includes the compressed air flow rate, determining the compressed air flow rate according to a working place of the compressed air and a purpose of the compressed air;

[0053] In the case where the operating status information includes the inner diameter of the compressed air pipe, the inner diameter of the compressed air pipe is calculated using the fifteenth calculation formula, which is:

[0054] Among them, d k is the inner diameter of the compressed air pipe, q w is the volume flow rate of compressed air when working, v is the flow velocity of compressed air in the pipe state;

[0055] Alternatively, the inner diameter of the compressed air pipe is calculated using the sixteenth calculation formula, which is:

[0056] Among them, q s is the reference volume flow rate of compressed air, t is the ambient temperature of the compressed air, and p is the working pressure of the compressed air.

[0057] Optionally, determining the operating status information of the positive-pressure dense-phase pneumatic conveying system includes:

[0058] When the operating status information includes the compressed air pipeline pressure loss, the compressed air pipeline pressure loss is determined according to the sum of the friction resistance of the compressed air straight pipe segment and the local resistance of the compressed air pipeline; or the compressed air pipeline pressure loss is calculated using the seventeenth calculation formula, which is:

[0059] Wherein, ΔP is the pressure loss of the compressed air pipeline, λ is the friction resistance coefficient of the pipeline, L is the length of the compressed air straight pipeline, d is the inner diameter of the compressed air pipeline, ζ is the local resistance coefficient, v is the compressed air flow rate under working conditions, g is the gravitational acceleration constant, and ρ is the compressed air density under working conditions.

[0060] Optionally, the method further includes:

[0061] In a case where the operating status information includes the total gas consumption of the air compressor system, the model and number of air compressors used in the positive-pressure dense-phase pneumatic conveying system are determined according to the total gas consumption of the air compressor system.

[0062] According to a second aspect of an embodiment of the present disclosure, there is provided a fault detection device, comprising:

[0063] a first determining module for determining operating status information of the positive-pressure dense-phase pneumatic conveying system, wherein the operating status information includes at least one of the following: the total amount of ash and slag generated by coal combustion in the electric field, the equivalent length of the conveying pipe section, the conveying design output, the ash-to-gas ratio, the conveying air mass flow rate, the conveying air volume flow rate under standard conditions, the conveying air volume flow rate under working conditions, the gas-ash mixing temperature at the starting section of the conveying pipeline, the conveying speed of the pneumatic ash conveying pipeline, the pneumatic ash conveying pipe diameter, the pipeline friction resistance coefficient, the pressure loss, the air lock valve volume, the silo pump volume, the air compressor free air flow rate, the air compressor standard volume flow rate, the total air consumption of the air compressor system, the inner diameter of the compressed air pipe, and the compressed air pipe pressure loss;

[0064] The second determining module is configured to determine a fault area of ​​the positive-pressure dense-phase pneumatic conveying system according to the operating status information.

[0065] To achieve the above-mentioned objective, a third embodiment of the present disclosure provides an electronic device, comprising:

[0066] processor, and

[0067] A memory for storing processor-executable instructions, wherein the processor is configured to execute the fault detection method proposed in the embodiment of the first aspect of the present disclosure when calling the executable instructions in the memory.

[0068] To achieve the above-mentioned purpose, the fourth embodiment of the present disclosure proposes a computer program, including computer-readable code. When the computer-readable code runs on a computing processing device, it causes the computing processing device to execute the fault detection method proposed in the first embodiment of the present disclosure.

[0069] To achieve the above-mentioned objectives, the fifth embodiment of the present disclosure proposes a computer-readable storage medium, in which the computer program proposed in the sixth embodiment of the present disclosure is stored.

[0070] Based on the above technical scheme, by determining the operating status information of the positive pressure dense phase pneumatic conveying system, the operating status information includes the total amount of ash and slag generated by coal combustion in the electric field, the equivalent length of the conveying pipe section, the conveying design output, the ash-to-gas ratio, the conveying air mass flow rate, the conveying air volume flow rate under standard conditions, the conveying air volume flow rate under working conditions, the gas-ash mixing temperature at the starting section of the conveying pipeline, the conveying speed of the pneumatic ash conveying pipeline, the pneumatic ash conveying pipe diameter, the pipeline friction resistance coefficient, the pressure loss, the air lock valve volume, the silo pump volume, the air compressor free air flow rate, the air compressor standard volume flow rate, the total gas consumption of the air compressor system, the compressed air flow rate, the inner diameter of the compressed air pipe, and at least one of the compressed air pipeline pressure loss; and by determining the fault area of ​​the positive pressure dense phase pneumatic conveying system according to the operating status information, the operating status information of the positive pressure dense phase pneumatic conveying system can be monitored in real time, and abnormal conditions can be accurately identified and the causes of the faults can be analyzed, so that staff can quickly identify and deal with safety hazards, thereby improving the safety and reliability of the system.

[0071] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Fig. 1 is a flow chart showing a fault detection method according to an exemplary embodiment.

[0073] FIG2 is a structural diagram of a positive-pressure dense-phase pneumatic conveying system according to an exemplary embodiment.

[0074] Fig. 3 is a structural diagram showing a fault detection device according to an exemplary embodiment.

[0075] Fig. 4 is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0076] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0077] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the corresponding data protection laws and policies of the country where they are located and with the authorization given by the owner of the corresponding device.

[0078] Figure 1 is a flow chart showing a fault detection method according to an exemplary embodiment. As shown in Figure 1 , an embodiment of the present disclosure provides a fault detection method, which can be executed by an electronic device and includes the following steps.

[0079] In step 101, operating status information of the positive-pressure dense-phase pneumatic conveying system is determined, where the operating status information includes at least one of the following: the total amount of ash generated by coal combustion in the electric field, the equivalent length of the conveying pipe section, the designed conveying output, the ash-to-gas ratio, the conveying air mass flow rate, the conveying air volume flow rate under standard conditions, the conveying air volume flow rate under working conditions, the gas-ash mixing temperature at the starting section of the conveying pipeline, the conveying speed of the pneumatic ash conveying pipeline, the pneumatic ash conveying pipe diameter, the pipeline friction resistance coefficient, the pressure loss, the air lock valve volume, the silo pump volume, the air compressor free air flow rate, the air compressor standard volume flow rate, the total air consumption of the air compressor system, the compressed air flow rate, the inner diameter of the compressed air pipe, and the compressed air pipe pressure loss;

[0080] In step 102, the fault area of ​​the positive-pressure dense-phase pneumatic conveying system is determined based on the operating status information.

[0081] Here, a positive pressure dense phase pneumatic conveying system is a system for conveying solid particulate materials. It utilizes the positive pressure generated by high-speed airflow and the principle of dense phase flow, using airflow as the transmission medium to transport solid particulate materials from a starting point to a destination. Figure 2 is a structural diagram of a positive pressure dense phase pneumatic conveying system 200 according to an exemplary embodiment. As shown in Figure 2, the positive pressure dense phase pneumatic conveying system 200 may include: a fine ash silo 201, a coarse ash silo 202, an ash silo gasification blower unit 203, an air compressor unit 204, an electrostatic precipitator gasification blower 205, an electrostatic precipitator 206, a pneumatic conveying pipeline unit 207, a denitrification air preheater ash conveying unit 208, a low-temperature economizer ash conveying unit 209, an ash silo unloading device 210, a fly ash transport vehicle 211, and a desulfurization system 212. The fine ash silo 201 and the coarse ash silo 202 serve as fly ash transfer and storage stations. Fly ash is loaded and unloaded via the ash silo unloading device 210 and transported by the fly ash transport vehicle 211. The ash silo gasification fan unit 203 prevents fly ash from compacting and provides the gasification power to ensure smooth ash discharge. The air compressor unit 204 provides the conveying power. The electrostatic precipitator gasification fan 205 ensures smooth ash discharge from the electrostatic precipitator 206. The electrostatic precipitator 206, the denitrification air preheater ash conveying unit 208, and the low-temperature economizer ash conveying unit 209 are key ash collection points for the boiler unit. The pneumatic conveying pipeline unit 207 connects the fine ash silo 201 and the coarse ash silo 202, respectively.

[0082] It should be understood that the operating status information of the positive pressure dense phase pneumatic conveying system can be calculated based on the calculation formula for operating status information and the known parameters of the positive pressure dense phase pneumatic conveying system by substituting the known parameters into the calculation formula. The operating status information of the positive pressure dense phase pneumatic conveying system can also be obtained by real-time monitoring of sensors installed in the positive pressure dense phase pneumatic conveying system.

[0083] After obtaining the actual operating status information, the actual operating status information can be compared with a preset operating status threshold. If the operating status information value of a region of the positive pressure dense phase pneumatic conveying system exceeds the preset operating status threshold, the region can be determined to be a faulty region of the positive pressure dense phase pneumatic conveying system. The actual operating status information value can also be compared with historical operating status information values, and the region corresponding to the operating status information with a significant difference can be determined as a faulty region of the positive pressure dense phase pneumatic conveying system.

[0084] Therefore, by real-time monitoring of the operating status information of the positive pressure dense phase pneumatic conveying system, abnormal situations can be accurately identified and the causes of failures can be analyzed so that staff can quickly identify and deal with safety hazards, thereby improving the safety and reliability of the system.

[0085] In some embodiments, determining the operating status information of the positive pressure dense phase pneumatic conveying system may include: when the operating status information includes the total amount of ash and slag generated by the electric field coal combustion, calculating the total amount of ash and slag generated by the electric field coal combustion using a first calculation formula, the first calculation formula being: G hz =B m ×(A ar / 100+Q net ×q4 / 3387)

[0086] Among them, G hz is the total amount of ash produced by coal combustion in the power plant, B m A is the actual coal consumption of each boiler under the maximum continuous evaporation condition. ar is the basic ash content of coal combustion, Q net is the basic low calorific value of the coal received, and q4 is the incomplete combustion loss of the boiler machinery.

[0087] Here, the received ash content and the received lower calorific value of the coal can be determined by the type of coal, the incomplete combustion loss of the boiler machinery can be provided by the boiler factory, and the actual coal consumption of each boiler under the maximum continuous evaporation condition can be obtained in real time.

[0088] For example, the actual coal burning amount of each boiler under the maximum continuous evaporation condition can be 351.5 tons / hour, the ash content of the coal as received can be 12.07%, the low calorific value of the coal as received can be 2241 kJ / kg, and the mechanical incomplete combustion loss of the boiler can be 30%. Through the first calculation formula, the total amount of ash generated by coal burning in the electric field can be obtained = 351.5×(12.07 / 00+241×0.3 / 33870)=49.4 tons / hour.

[0089] In some embodiments, the method may further include: determining the amount of ash generated by coal burning in the electric field based on the product of the total amount of ash and slag generated by coal burning in the electric field and the fly ash distribution rate of the coal burning in the electric field; determining the amount of slag generated by coal burning in the electric field based on the product of the total amount of ash and slag generated by coal burning in the electric field and the slag distribution rate of the coal burning in the electric field.

[0090] Here, the sum of the electric field coal-fired fly ash distribution rate and the electric field coal-fired slag distribution rate is 100%. The electric field coal-fired fly ash distribution rate and the electric field coal-fired slag distribution rate can be determined according to the type of equipment. For example, the corresponding relationship between the electric field coal-fired fly ash distribution rate and the electric field coal-fired slag distribution rate and the type of equipment can be shown in Table 1.

[0091] Table 1:

[0092] The slag distribution rate for electric-fired coal can also be determined by the type of equipment. For example, the fly ash distribution rate for an economizer can be 3%-5%, the fly ash distribution rate for an air preheater can be 2%-3%, and the fly ash distribution rate for a dust collector can be the dust removal efficiency. Accordingly, the fly ash distribution rate for electric-fired coal is 100% minus the fly ash distribution rate.

[0093] For example, the total amount of ash and slag generated by coal burning in the electric field can be 49.4 tons / hour, the fly ash distribution rate of coal burning in the electric field can be 90%, and the slag distribution rate of coal burning in the electric field can be 10%. It can be obtained that the amount of ash generated by coal burning in the electric field is 49.4×90%=44.46 tons / hour, and the amount of slag generated by coal burning in the electric field is 49.4×10%=4.94 tons / hour.

[0094] In some embodiments, determining the operating status information of the positive pressure dense phase pneumatic conveying system may include: when the operating status information includes the equivalent length of the conveying pipe section, calculating the equivalent length of the conveying pipe section using a second calculation formula, the second calculation formula being: L e =L+H+∑nL r

[0095] Among them, L e is the equivalent length of the transmission pipe section, L is the total length of the horizontal transmission pipe section, H is the total length of the vertical transmission pipe section, n is the number of various pipeline accessories, L r is the equivalent length of various pipe accessories;

[0096] In the case where the operating status information includes the transport design output, the transport design output is determined based on the product of the ash volume generated by the coal combustion in the power field and the design margin coefficient;

[0097] When the operating status information includes the ash-to-gas ratio, the ash-to-gas ratio is calculated using the third calculation formula. The ash-to-gas ratio is the ratio between the conveyed material volume and the conveyed gas consumption. The third calculation formula is:

[0098] Among them, μ is the ash-to-gas ratio, β is the fly ash characteristic value, L e is the equivalent length of the transmission pipe section.

[0099] Here, the equivalent length of the pipeline section can be calculated using the second formula by summing the total length of the horizontal pipeline section, the total length of the vertical pipeline section, and the equivalent lengths of all pipeline accessories. The corresponding relationship between the equivalent length of pipeline accessories and the type of pipeline can be shown in Table 2.

[0100] Table 2:

[0101] For example, the total length of the horizontal conveying pipe section of the conveying pipe section can be 600 meters, the vertical conveying pipe section can include the vertical pipe gallery and the ash bin climbing, the total length of the vertical conveying pipe section can be 29 meters, and the conveying pipe section can include 13 90° elbow pipe accessories. According to Table 2, it can be determined that the equivalent length of a single pipe accessory is 10 meters. The equivalent length of the conveying pipe section can be calculated by the second calculation formula = 600 + 29 + 130 (13×10) = 759 meters.

[0102] It is worth noting that the design margin coefficient is the margin design coefficient selected with reference to the ash content of the design coal type. The design margin coefficient can be determined based on the equivalent transportation distance between the collected fly ash and the ash storage point. The corresponding relationship between the design margin coefficient and the equivalent transportation distance between the collected fly ash and the ash storage point is shown in Table 3.

[0103] Table 3:

[0104] For example, the amount of ash generated by the electric field coal combustion in an electric field of a positive pressure dense phase pneumatic conveying system can be 32.82 tons / hour, and the transportation equivalent distance from the collection of fly ash to the ash storage point can be 700 meters. According to Table 3, the design margin coefficient is selected as 150%, and the transportation design output can be calculated as 32.82×150%=49.23 tons / hour.

[0105] The fly ash characteristic value can be determined according to the type of equipment. For example, the fly ash characteristic value corresponding to an electrostatic precipitator may be 500, and the fly ash characteristic value corresponding to an economizer, a denitrification equipment, and a recycling equipment may be 300.

[0106] For example, an electric field of a positive pressure dense phase pneumatic conveying system may include an electrostatic precipitator, the corresponding fly ash characteristic value may be 500, and the equivalent length of the conveying pipe section may be 759 meters. The corresponding electric field can be calculated by the third calculation formula

[0107] In some embodiments, determining the operating status information of a positive-pressure dense-phase pneumatic conveying system may include: when the operating status information includes the conveying air mass flow rate and the conveying air volume flow rate under standard conditions, determining the conveying air mass flow rate and the conveying air volume flow rate under standard conditions based on the ratio between the conveying design output and the ash-gas ratio.

[0108] Here, the transport air mass flow rate can be determined by multiplying the ratio of the transport design output to the ash-to-gas ratio by the first coefficient, where the first coefficient can be 16.67. The transport air volume flow rate under standard conditions can be determined by multiplying the ratio of the transport design output to the ash-to-gas ratio by the second coefficient, where the second coefficient can be 12.89. It is worth noting that the second coefficient is determined by dividing the first coefficient by the air density under standard conditions, where the air density under standard conditions is 1.293 kg / m3.

[0109] For example, the conveying design output can be 49.23 tons / hour, the ash-to-gas ratio can be 18.15, and the conveying air mass flow rate can be calculated to be 16.67×49.23 / 18.15=45.21 kg / min, and the conveying air volume flow rate under standard conditions is 12.89×49.23 / 18.15=34.96 cubic meters / min.

[0110] In some embodiments, determining the operating state information of the positive pressure dense phase pneumatic conveying system may include: when the operating state information includes the conveying air volume flow rate in the working state, calculating the conveying air volume flow rate in the working state by a fourth calculation formula, the fourth calculation formula is: q v =12.89×G / μ×P0 / P×(273+t) / 273

[0111] Among them, q v is the conveying air volume flow rate under working conditions, G is the conveying design output, μ is the ash-gas ratio, P0 is the standard atmospheric pressure, P is the absolute pressure at any point in the pipeline, and t is the temperature at any point in the pipeline;

[0112] In the case where the operating status information includes the gas-ash mixture temperature at the starting section of the conveying pipeline, the gas-ash mixture temperature at the starting section of the conveying pipeline is calculated using the fifth calculation formula, which is: m =(G×c h ×t h +G ma ×c a ×t a ) / (G×c h +G ma ×c a )

[0113] Among them, tm is the gas-ash mixture temperature at the starting section of the conveying pipeline, G is the conveying design output, G ma is the transported air mass flow rate, c h is the specific heat capacity of dry ash, c a is the specific heat capacity of air, t h is the boiler exhaust temperature or ash particle temperature, t a To deliver compressed air temperature;

[0114] The operating status information includes the conveying speed of the pneumatic ash conveying pipeline, and the conveying speed of the pneumatic ash conveying pipeline is calculated by the sixth calculation formula. The sixth calculation formula is: v = 0.0212 × q v / D 2

[0115] Among them, v is the conveying speed of the pneumatic ash conveying pipeline, D is the diameter of the pneumatic ash conveying pipeline, q V Calculates the air volume flow rate at the duct point.

[0116] For example, the transport design output may be 49.23 tons / hour, the ash-to-gas ratio may be 18.15, and the standard atmospheric pressure may be 1.0133×10 5 Pa, the absolute pressure at any point in the pipeline can be 1.06×10 5 Pa, the temperature at any point in the pipeline can be 36°C. The fourth calculation formula can be used to calculate the conveying air volume flow rate under working conditions = 12.89×49.23 / 18.15×1.0133 / 1.06×(273+36) / 273 = 37.83 cubic meters / minute.

[0117] The dry ash specific heat capacity can be determined according to the ash particle temperature. The corresponding relationship between the dry ash specific heat capacity and the ash particle temperature can be shown in Table 4.

[0118] Table 4:

[0119] For example, the conveying design output can be 49.23 tons / hour, the conveying air mass flow rate can be 45.21 kg / min, the air specific heat capacity can be 1.0032 kJ / (kg·℃), the ash particle temperature can be 90℃, and according to Table 4, it can be determined that the dry ash specific heat capacity can be 0.18 kJ / (kg·℃), the conveying compressed air temperature can be 35℃, and the gas-ash mixing temperature at the starting section of the conveying pipeline can be calculated by the fifth calculation formula as (49.23×0.18×90+45.21×1.0032×35) / (49.23×0.18+45.21×1.0032)=43.99℃.

[0120] For example, the air volume flow rate at the pipeline calculation point can be 37.83 cubic meters per minute, and the diameter of the pneumatic ash conveying pipe can be 0.207 meters. The sixth calculation formula can be used to calculate the conveying speed of the pneumatic ash conveying pipeline = 0.0212×37.83 / 0.207 2 =18.7m / s.

[0121] In some embodiments, determining the operating status information of the positive pressure dense phase pneumatic conveying system may include: when the operating status information includes the diameter of the pneumatic ash conveying pipe, calculating the diameter of the pneumatic ash conveying pipe using the seventh calculation formula, the seventh calculation formula being:

[0122] Among them, D is the diameter of the pneumatic ash conveying pipe, q V is the air volume flow rate at the calculation point of the pipeline, and v is the conveying speed of the pneumatic ash conveying pipeline;

[0123] When the operating status information includes the pipeline friction resistance coefficient, the pipeline friction resistance coefficient is calculated using the eighth calculation formula, which is:

[0124] Where λ is the friction coefficient of the pipeline, d is the inner diameter of the calculation pipeline, and ε is the average absolute roughness of the inner wall of the pipeline;

[0125] When the operating status information includes pressure loss, the pressure loss is calculated using the ninth calculation formula, which is: △P=∑△P L +△P P +△P0+△P f

[0126] Among them, △P is the pressure loss, △P L is the pipeline pressure loss, △P P is the equipment pressure loss, △P0 is the storage pressure loss, △P f is the pressure loss of the bag filter.

[0127] Here, the diameter of the pneumatic ash conveying pipe and the conveying speed of the pneumatic ash conveying pipe affect each other. The diameter of the pneumatic ash conveying pipe can be assumed and the conveying speed of the pneumatic ash conveying pipe can be calculated by the sixth calculation formula; or the conveying speed of the pneumatic ash conveying pipe can be assumed and the diameter of the pneumatic ash conveying pipe can be calculated by the seventh calculation formula.

[0128] For example, it can be assumed that the conveying speed of the pneumatic ash conveying pipeline is 10 m / s, and the air volume flow rate at the pipeline calculation point can be 37.83 cubic meters / minute. The seventh calculation formula can be used to calculate

[0129] The average absolute roughness of the inner wall of the pipeline can be determined according to the type of pipeline material. For example, the ε of a seamless steel pipe can be 0.0002 meters, the ε of a welded steel pipe can be 0.0003 meters, and the ε of a cast iron alloy pipe can be 0.0005 meters.

[0130] For example, the calculated pipe can be a seamless steel pipe, the corresponding average absolute roughness of the inner wall of the pipe can be 0.0002 meters, and the inner diameter can be 0.5 meters. The eighth calculation formula can be used to calculate

[0131] Pipeline pressure loss can be the sum of horizontal pipeline pressure loss, vertical pipeline pressure loss, and pressure loss of various pipeline accessories. Pipeline pressure loss can also be calculated using the following formula:

[0132] Among them, △P L is the pipeline pressure loss, Pe is the absolute pressure at the end of the calculated pipeline, λa is the air friction resistance coefficient of the calculated pipeline section, L eq is the equivalent length of the calculated pipe section, D is the inner diameter of the calculated pipe, and ρ e To calculate the air density at the end of the pipe section, g is the acceleration due to gravity, k is the two-phase flow coefficient, and μ is the ash-gas ratio. The two-phase flow coefficient can be obtained experimentally and can be determined based on the inner diameter of the calculation pipe. The corresponding relationship between the two-phase flow coefficient and the inner diameter of the calculation pipe is shown in Table 5.

[0133] Table 5:

[0134] The equipment pressure loss can be determined based on the silo pump air flow rate. The corresponding relationship between the equipment pressure loss and the silo pump air flow rate is shown in Table 6.

[0135] Table 6:

[0136] The inlet pressure loss can be determined by actual engineering measurements and can be 3000Pa-5000Pa. The inlet pressure loss can also be calculated using the following formula: △P0=0.5×Pe×V e0 2 ×(1+0.64μ)

[0137] Among them, △P0 is the pressure loss in the warehouse, Pe is the air density at the end of the pipeline, V e0 is the air velocity at the end of the pipe, and μ is the ash-to-gas ratio.

[0138] The pressure loss of the bag dust collector can be determined based on the factory data of the dust collector, or a suitable value can be selected from the range of [1000, 1500].

[0139] In some embodiments, determining the operating status information of the positive pressure dense phase pneumatic conveying system may include: when the operating status information includes the volume of the air lock valve, calculating multiple air lock valve volumes using the tenth calculation formula, the tenth calculation formula is: V = G × [t + 0.4t (n-1)] / 3600 × ρ d ×k×E×n

[0140] Among them, V is the volume of the air lock valve, G is the designed delivery output, ρ d is the ash bulk density, k is the ash bulk density coefficient in the gasification state, t is the opening time of the gas lock bottom valve, E is the system efficiency coefficient, and n is the number of gas lock valves discharging simultaneously;

[0141] When the operating status information includes the silo pump volume, the silo pump volume is calculated using the eleventh calculation formula, which is:

[0142] Among them, V P is the volume of the silo pump, G1 is the output of a single silo pump, ψ is the filling coefficient of the silo pump, ρ h is the bulk density of ash, t1 is the time required to fill a bin pump, and t2 is the time required to blow a bin pump;

[0143] Alternatively, the silo pump capacity can be calculated using the twelfth calculation formula, which is:

[0144] Among them, G2 is the output of the double-bin pump, and t3 is the pressure recovery time of the bin pump.

[0145] Here, the system efficiency coefficient can be determined according to the number of simultaneous discharges of the gas lock valves. The corresponding relationship between the system efficiency coefficient and the number of simultaneous discharges of the gas lock valves can be shown in Table 7.

[0146] Table 7:

[0147] For example, the design conveying output can be 49.23 tons / hour, the ash bulk density can be 0.7 tons / cubic meter, the ash bulk density coefficient in the gasification state can be 0.75, the airlock bottom valve opening time can be 60, the number of airlock valves simultaneously discharging can be 1, and the corresponding system efficiency coefficient is 0.8. Using the tenth formula, we can calculate the airlock valve volume = 49.23 × 60 / 3600 × 0.7 × 0.75 × 0.8 = 0.34 cubic meters.

[0148] When the silo pump is a single silo pump, the output of a single silo pump can be 49.23 tons / hour, the silo pump filling coefficient can be 0.8, the ash bulk density can be 0.9 tons / cubic meter, the time required to fill a silo pump can be 1 minute, and the time required to blow a silo pump can be 2 minutes. Through the eleventh calculation formula, it can be calculated that the silo pump volume = 49.23×(1+2) / 60×0.8×0.9=1.77 cubic meters.

[0149] When the silo pump is a double-silo pump, the output of the double-silo pump can be 49.23 tons / hour, the silo pump filling coefficient can be 0.8, the ash bulk density can be 0.9 tons / cubic meter, the time required to fill a silo pump can be 2 minutes, and the time required to blow a silo pump can be 3 minutes. Through the eleventh calculation formula, it can be calculated that the silo pump volume = 49.23×(2+3) / 60×0.8×0.9=2.95 cubic meters.

[0150] In some embodiments, determining the operating status information of the positive pressure dense phase pneumatic conveying system may include: when the operating status information includes the free air flow of the air compressor, calculating the free air flow of the air compressor using the thirteenth calculation formula, the thirteenth calculation formula is: q f =P w / P×(273+t / 273+t0)×q e

[0151] Among them, q f is the free air flow of the air compressor, q e P is the volume flow rate of compressed air at the gas point, w is the compressed air working pressure at the gas consumption point, P is the compressed air working pressure at the gas consumption point, t0 is the air temperature at the air compressor outlet, and t is the working environment temperature of the air compressor;

[0152] When the operating status information includes the air compressor standard state volume flow rate, the air compressor standard state volume flow rate is calculated by the fourteenth calculation formula, which is: q N =P / P0×(273.073+t)×q f

[0153] Among them, q N is the standard volume flow rate of the air compressor, q f is the free air flow of the air compressor, P0 is the standard atmospheric pressure, P is the working environment pressure of the air compressor, and t is the working environment temperature of the air compressor;

[0154] When the operating status information includes the total gas consumption of the air compressor system, the total gas consumption of the air compressor system is determined based on the total air consumption of the unit instruments, the total compressed air used for ash removal and transportation, and the gas required by other compressed air users;

[0155] Alternatively, the total gas consumption of the air compressor system can be determined based on the sum of the stable gas volume and the fluctuating gas volume when the dust removal system is working;

[0156] In the case where the operating status information includes the compressed air flow rate, the compressed air flow rate is determined according to the working place of the compressed air and the purpose of the compressed air;

[0157] When the operating status information includes the inner diameter of the compressed air pipe, the inner diameter of the compressed air pipe is calculated using the fifteenth calculation formula, which is:

[0158] Among them, d k is the inner diameter of the compressed air pipe, q w is the volume flow rate of compressed air when working, v is the flow velocity of compressed air in the pipe state;

[0159] Alternatively, the inner diameter of the compressed air pipe can be calculated using the sixteenth calculation formula, which is:

[0160] Among them, q s is the reference volume flow rate of compressed air, t is the ambient temperature of the compressed air, and p is the working pressure of the compressed air.

[0161] Here, the compressor free air flow rate is the flow rate converted from the compressor outlet flow rate to the inlet conditions, representing the amount of free air drawn into the compressor per unit time. The total instrument air consumption for the unit can be 40-60 cubic meters per minute, and the air consumption required by other compressed air users can be 10-15 cubic meters per minute. For example, the total instrument air consumption for the unit can be 60 cubic meters per minute, the total compressed air used for ash removal and transportation can be 132.35 cubic meters per minute, and the air consumption required by other compressed air users can be 15 cubic meters per minute. The total air consumption of the air compressor system can be calculated as 60 + 132.35 + 15 = 207.35 cubic meters per minute.

[0162] In some embodiments, determining the operating status information of the positive pressure dense phase pneumatic conveying system may include: when the operating status information includes the compressed air pipeline pressure loss, determining the compressed air pipeline pressure loss based on the sum of the friction resistance of the compressed air straight pipe segment and the local resistance of the compressed air pipeline; or calculating the compressed air pipeline pressure loss using the seventeenth calculation formula, which is:

[0163] Wherein, ΔP is the pressure loss of the compressed air pipeline, λ is the pipeline friction resistance coefficient, L is the length of the compressed air straight pipeline, d is the inner diameter of the compressed air pipeline, ζ is the local resistance coefficient, v is the compressed air flow rate under working conditions, g is the gravity acceleration constant, and ρ is the compressed air density under working conditions.

[0164] In some embodiments, the method may further include: when the operating status information includes the total gas consumption of the air compressor system, determining the model and number of air compressors used in the positive pressure dense phase pneumatic conveying system based on the total gas consumption of the air compressor system.

[0165] Here, the air compressor model can be a screw, centrifugal, or a combination of screw and centrifugal compressors, and the air compressor output must meet actual operating requirements. For example, the air compressor model and number are determined based on the parameters of screw and centrifugal air compressors, and the total air compressor system gas consumption is greater than 110% of the actual total air compressor system gas consumption, with maintenance and standby air compressors reserved.

[0166] Therefore, by determining the operating status information of the positive pressure dense phase pneumatic conveying system, the operating status information includes the total amount of ash and slag generated by coal combustion in the electric field, the equivalent length of the conveying pipe section, the conveying design output, the ash-to-gas ratio, the conveying air mass flow rate, the conveying air volume flow rate under standard conditions, the conveying air volume flow rate under working conditions, the gas-ash mixing temperature at the starting section of the conveying pipeline, the conveying speed of the pneumatic ash conveying pipeline, the pneumatic ash conveying pipe diameter, the pipeline friction resistance coefficient, the pressure loss, the air lock valve volume, the silo pump volume, the air compressor free air flow rate, the air compressor standard volume flow rate, the total gas consumption of the air compressor system, the compressed air flow rate, the inner diameter of the compressed air pipe, and at least one of the compressed air pipeline pressure loss; and by determining the fault area of ​​the positive pressure dense phase pneumatic conveying system according to the operating status information, the operating status information of the positive pressure dense phase pneumatic conveying system can be monitored in real time, and abnormal conditions can be accurately identified and the causes of the faults can be analyzed, so that staff can quickly identify and deal with safety hazards, thereby improving the safety and reliability of the system.

[0167] FIG3 is a structural diagram of a fault detection device 300 according to an exemplary embodiment. As shown in FIG3 , the fault detection device 300 may include:

[0168] The first determining module 301 is used to determine the operating status information of the positive pressure dense phase pneumatic conveying system, wherein the operating status information includes at least one of the following: the total amount of ash and slag generated by coal combustion in the electric field, the equivalent length of the conveying pipe section, the conveying design output, the ash-to-gas ratio, the conveying air mass flow rate, the conveying air volume flow rate under standard conditions, the conveying air volume flow rate under working conditions, the gas-ash mixing temperature at the starting section of the conveying pipeline, the conveying speed of the pneumatic ash conveying pipeline, the pneumatic ash conveying pipe diameter, the pipeline friction resistance coefficient, the pressure loss, the air lock valve volume, the silo pump volume, the air compressor free air flow rate, the air compressor standard volume flow rate, the total air consumption of the air compressor system, the inner diameter of the compressed air pipe, and the compressed air pipe pressure loss;

[0169] The second determining module 302 is configured to determine a fault area of ​​the positive-pressure dense-phase pneumatic conveying system according to the operating status information.

[0170] Optionally, the first determining module 301 is specifically configured to:

[0171] In the case where the operating status information includes the total amount of ash and slag generated by coal combustion in the electric field, the total amount of ash and slag generated by coal combustion in the electric field is calculated using a first calculation formula, and the first calculation formula is: G hz =B m ×(A ar / 100+Q net ×q4 / 3387)

[0172] Among them, G hz is the total amount of ash produced by coal combustion in the electric field, B m A is the actual coal consumption of each boiler under the maximum continuous evaporation condition. ar is the basic ash content of coal combustion, Q net is the basic low calorific value of the coal received, and q4 is the incomplete combustion loss of the boiler machinery.

[0173] Optionally, the fault detection device 300 further includes:

[0174] a third determining module, configured to determine the amount of ash generated by the coal combustion in the electric field according to the product of the total amount of ash residue generated by the coal combustion in the electric field and the fly ash distribution rate of the coal combustion in the electric field;

[0175] The fourth determining module is used to determine the amount of slag generated by the coal burning in the electric field according to the product of the total amount of ash and slag generated by the coal burning in the electric field and the slag distribution rate of the coal burning in the electric field.

[0176] Optionally, the first determining module 301 is specifically configured to:

[0177] In the case where the operating status information includes the equivalent length of the transport pipe section, the equivalent length of the transport pipe section is calculated using a second calculation formula, and the second calculation formula is: L e =L+H+∑nL r

[0178] Among them, L e is the equivalent length of the transport pipe section, L is the total length of the horizontal transport pipe section, H is the total length of the vertical transport pipe section, n is the number of various pipeline accessories, L r is the equivalent length of various pipe accessories;

[0179] In the case where the operating status information includes the transport design output, the transport design output is determined according to the product of the amount of ash generated by coal combustion in the electric field and the design margin coefficient;

[0180] In the case where the operating status information includes the ash-to-gas ratio, the ash-to-gas ratio is calculated using a third calculation formula. The ash-to-gas ratio is the ratio of the conveyed material amount to the conveyed gas consumption. The third calculation formula is:

[0181] Wherein, μ is the ash-to-gas ratio, β is the fly ash characteristic value, L e is the equivalent length of the transport pipe section.

[0182] Optionally, the first determining module 301 is specifically configured to:

[0183] When the operating status information includes the conveying air mass flow rate and the conveying air volume flow rate under the standard state, the conveying air mass flow rate and the conveying air volume flow rate under the standard state are determined according to the ratio between the conveying design output and the ash-to-gas ratio.

[0184] Optionally, the first determining module 301 is specifically configured to:

[0185] When the operating state information includes the conveying air volume flow rate in the working state, the conveying air volume flow rate in the working state is calculated by a fourth calculation formula, and the fourth calculation formula is: q v =12.89×G / μ×P0 / P×(273+t) / 273

[0186] Among them, q v is the conveying air volume flow rate under the working state, G is the conveying design output, μ is the ash-to-gas ratio, P0 is the standard atmospheric pressure, P is the absolute pressure at any point in the pipeline, and t is the temperature at any point in the pipeline;

[0187] In the case where the operating status information includes the gas-ash mixture temperature at the starting section of the conveying pipeline, the gas-ash mixture temperature at the starting section of the conveying pipeline is calculated using the fifth calculation formula, which is: m =(G×c h ×t h +G ma ×c a ×t a ) / (G×c h +G ma ×c a )

[0188] Among them, t m is the gas-ash mixture temperature at the starting section of the conveying pipeline, G is the conveying design output, G ma is the transported air mass flow rate, c h is the specific heat capacity of dry ash, c a is the specific heat capacity of air, t h is the boiler exhaust temperature or ash particle temperature, t a To deliver compressed air temperature;

[0189] When the operation status information includes the conveying speed of the pneumatic ash conveying pipeline, the conveying speed of the pneumatic ash conveying pipeline is calculated by the sixth calculation formula, which is: v = 0.0212 × q v / D 2

[0190] Among them, v is the conveying speed of the pneumatic ash conveying pipeline, D is the diameter of the pneumatic ash conveying pipeline, q V Calculates the air volume flow rate at the duct point.

[0191] Optionally, the first determining module 301 is specifically configured to:

[0192] In the case where the operating status information includes the diameter of the pneumatic ash conveying pipe, the diameter of the pneumatic ash conveying pipe is calculated using the seventh calculation formula, which is:

[0193] Among them, D is the diameter of the pneumatic ash conveying pipe, q V is the air volume flow rate at the calculation point of the pipeline, and v is the conveying speed of the pneumatic ash conveying pipeline;

[0194] In the case where the operating status information includes the pipeline friction resistance coefficient, the pipeline friction resistance coefficient is calculated using an eighth calculation formula, which is:

[0195] Wherein, λ is the friction coefficient of the pipeline, d is the inner diameter of the calculated pipeline, and ε is the average absolute roughness of the inner wall of the pipeline;

[0196] In the case where the operating state information includes the pressure loss, the pressure loss is calculated using a ninth calculation formula, which is: ΔP = ∑ΔP L +△P P +△P0+△P f

[0197] Among them, △P is the pressure loss, △P L is the pipeline pressure loss, △P P is the equipment pressure loss, △P0 is the storage pressure loss, △P f is the pressure loss of the bag filter.

[0198] Optionally, the first determining module 301 is specifically configured to:

[0199] In the case where the operating status information includes the air lock valve volume, the multiple air lock valve volumes are calculated using the tenth calculation formula, which is: V=G×[t+0.4t(n-1)] / 3600×ρ d ×k×E×n

[0200] Wherein, V is the volume of the air lock valve, G is the designed delivery output, ρ d is the ash bulk density, k is the ash bulk density coefficient in the gasification state, t is the opening time of the gas lock bottom valve, E is the system efficiency coefficient, and n is the number of gas lock valves discharging simultaneously;

[0201] In the case where the operating status information includes the silo pump volume, the silo pump volume is calculated using the eleventh calculation formula, which is:

[0202] Among them, V P is the volume of the silo pump, G1 is the output of a single silo pump, ψ is the silo pump filling coefficient, ρ h is the bulk density of ash, t1 is the time required to fill a bin pump, and t2 is the time required to blow a bin pump;

[0203] Alternatively, the silo pump volume is calculated using the twelfth calculation formula, which is:

[0204] Among them, G2 is the output of the double-bin pump, and t3 is the pressure recovery time of the bin pump.

[0205] Optionally, the first determining module 301 is specifically configured to:

[0206] In the case where the operating status information includes the free air flow of the air compressor, the free air flow of the air compressor is calculated using the thirteenth calculation formula, which is: qf =P w / P×(273+t / 273+t0)×q e

[0207] Among them, q f is the free air flow of the air compressor, q e P is the volume flow rate of compressed air at the gas point, w is the compressed air working pressure at the gas consumption point, P is the compressed air working pressure at the gas consumption point, t0 is the air temperature at the air compressor outlet, and t is the working environment temperature of the air compressor;

[0208] In the case where the operating status information includes the air compressor standard state volume flow rate, the air compressor standard state volume flow rate is calculated using the fourteenth calculation formula, which is: q N =P / P0×(273.073+t)×q f

[0209] Among them, q N is the standard volume flow rate of the air compressor, q f is the free air flow of the air compressor, P0 is the standard atmospheric pressure, P is the working environment pressure of the air compressor, and t is the working environment temperature of the air compressor;

[0210] In the case where the operating status information includes the total gas consumption of the air compressor system, the total gas consumption of the air compressor system is determined based on the sum of the total air consumption of the unit instruments, the total compressed air consumption for ash removal and transportation, and the gas consumption required by other compressed air users;

[0211] Alternatively, the total gas consumption of the air compressor system is determined according to the sum of the stable gas volume when the ash removal system is working and the fluctuating gas volume when the ash removal system is working;

[0212] In a case where the operating status information includes the compressed air flow rate, determining the compressed air flow rate according to a working place of the compressed air and a purpose of the compressed air;

[0213] In the case where the operating status information includes the inner diameter of the compressed air pipe, the inner diameter of the compressed air pipe is calculated using the fifteenth calculation formula, which is:

[0214] Among them, d k is the inner diameter of the compressed air pipe, q w is the volume flow rate of compressed air when working, v is the flow velocity of compressed air in the pipe state;

[0215] Alternatively, the inner diameter of the compressed air pipe is calculated using the sixteenth calculation formula, which is:

[0216] Among them, q s is the reference volume flow rate of compressed air, t is the ambient temperature of the compressed air, and p is the working pressure of the compressed air.

[0217] Optionally, the first determining module 301 is specifically configured to:

[0218] When the operating status information includes the compressed air pipeline pressure loss, the compressed air pipeline pressure loss is determined according to the sum of the friction resistance of the compressed air straight pipe segment and the local resistance of the compressed air pipeline; or the compressed air pipeline pressure loss is calculated using the seventeenth calculation formula, which is:

[0219] Wherein, ΔP is the pressure loss of the compressed air pipeline, λ is the friction resistance coefficient of the pipeline, L is the length of the compressed air straight pipeline, d is the inner diameter of the compressed air pipeline, ζ is the local resistance coefficient, v is the compressed air flow rate under working conditions, g is the gravitational acceleration constant, and ρ is the compressed air density under working conditions.

[0220] Optionally, the fault detection device 300 further includes:

[0221] The fifth determination module is used to determine the model and number of air compressors used in the positive pressure dense phase pneumatic conveying system according to the total gas consumption of the air compressor system when the operating status information includes the total gas consumption of the air compressor system.

[0222] Regarding the device 300 in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0223] To implement the above embodiments, the present disclosure further proposes an electronic device, comprising: a processor and a memory for storing processor-executable instructions, wherein the processor is configured to execute the aforementioned fault detection method when calling the executable instructions in the memory.

[0224] In order to implement the above embodiments, the present disclosure further proposes a computer program, comprising computer-readable codes. When the computer-readable codes are executed on a computing processing device, the computing processing device is caused to execute the above fault detection method.

[0225] In order to implement the above embodiments, the present disclosure also proposes a computer-readable storage medium in which the above-mentioned computer program is stored.

[0226] FIG4 illustrates a block diagram of an electronic device 400 according to an embodiment of the present disclosure. The electronic device 400 may be any type of general-purpose or specialized computing device, such as a desktop computer, laptop computer, server, mainframe computer, cloud-based computer, tablet computer, wearable device, or vehicle electronic device. As shown in FIG4 , the electronic device 400 includes an input / output (I / O) interface 401, a network interface 402, a memory 404, and a processor 403.

[0227] The I / O interface 401 is a collection of components that can receive input from a user and / or provide output to a user. The I / O interface 401 may include, but is not limited to, buttons, a keyboard, a keypad, an LCD display, an LED display, or other similar display devices, including a display device with touch screen capabilities that enables interaction between a user and the electronic device.

[0228] The network interface 402 may include various adapters and circuitry implemented in software and / or hardware to enable communication with the lidar system using wired or wireless protocols. Wired protocols may include one or more serial port protocols, parallel port protocols, Ethernet protocols, USB protocols, or other wired communication protocols. Wireless protocols may include any IEEE 802.11 Wi-Fi protocol, cellular network communication protocols, and the like.

[0229] Memory 404 includes a single memory or one or more memories or storage locations, including but not limited to random access memory (RAM), dynamic random access memory (DRAM), static random access memory (SRAM), read-only memory (ROM), EPROM, EEPROM, flash memory, logic blocks of an FPGA, a hard disk, or any other layer of the memory hierarchy. Memory 404 can be used to store any type of instructions, software, or algorithms, including instructions 405 for controlling the general functions and operations of electronic device 400.

[0230] The processor 403 controls the general operation of the electronic device 400. The processor 403 may include, but is not limited to, a CPU, a hardware microprocessor, a hardware processor, a multi-core processor, a single-core processor, a microcontroller, an application-specific integrated circuit (ASIC), a DSP, or other similar processing device, capable of executing any type of instructions, algorithms, or software for controlling the operation and functions of the electronic device 400 according to the embodiments described in this disclosure. The processor 403 may be various implementations of digital circuitry, analog circuitry, or mixed-signal (a combination of analog and digital) circuitry that performs functions in a computing system. The processor 403 may include, for example, portions or circuits of a separate processor core, an entire processor core, a separate processor, a programmable hardware device such as a field programmable gate array (FPGA), and / or a system including multiple processors.

[0231] An internal bus 406 may be used to establish communications between components of the electronic device 400 .

[0232] Electronic device 400 is communicatively coupled to the laser radar system to be calibrated to control the operation of the laser radar system. For example, the fault detection method according to the present disclosure can be stored in the form of computer-readable instructions on memory 404 of electronic device 400. Processor 403 implements the fault detection method by reading the stored computer-readable instructions.

[0233] Although specific components are used to describe electronic device 400, in alternative embodiments, different components may be present in electronic device 400. For example, electronic device 400 may include one or more additional processors, memories, network interfaces, and / or I / O interfaces. In addition, one or more of the components may not be present in electronic device 400. Furthermore, although separate components are shown in FIG. 4 , in some embodiments, some or all of a given component may be integrated into one or more of the other components in electronic device 400.

[0234] The present disclosure may be implemented as any combination of an apparatus, a system, an integrated circuit, and a computer program or program product on a non-transitory computer-readable medium.

[0235] It should be understood that the computer-executable instructions in the computer-readable storage medium or program product according to the embodiments of the present disclosure can be configured to perform operations corresponding to the above-mentioned device and method embodiments. When referring to the above-mentioned device and method embodiments, the embodiments of the computer-readable storage medium or program product are clear to those skilled in the art and are therefore not described again. Computer-readable storage media and program products for carrying or including the above-mentioned computer-executable instructions also fall within the scope of the present disclosure. Such storage media may include, but are not limited to, floppy disks, optical disks, magneto-optical disks, memory cards, memory sticks, and the like.

[0236] In addition, it should be understood that the above series of processes and devices can also be implemented by software and / or firmware. In the case of implementation by software and / or firmware, the storage medium of the relevant device stores the corresponding program constituting the corresponding software, and when the program is executed, various functions can be performed.

[0237] For example, in the above embodiments, multiple functions included in one unit can be implemented by separate devices. Alternatively, multiple functions implemented by multiple units in the above embodiments can be implemented by separate devices respectively. In addition, one of the above functions can be implemented by multiple units. Such a configuration is included in the technical scope of the present disclosure.

[0238] In the present disclosure, the steps described in the flowchart include not only processing performed in time series in the order described, but also processing performed in parallel or individually rather than necessarily in time series. In addition, even in the steps processed in time series, the order can be appropriately changed.

[0239] The terms "comprises," "comprising," or any other variations thereof in the presently disclosed embodiments are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0240] The term "or" in this disclosure means an inclusive "or" rather than an exclusive "or". A reference to a "first" component does not necessarily require the presence of a "second" component. Furthermore, unless explicitly indicated, the reference to a "first" or "second" component does not limit the referenced components to a particular order. The term "based on" means "based at least in part on."

Claims

1. A fault detection method, characterized in that, The method includes: Determining the operating state information of the positive pressure dense phase pneumatic conveying system, where the operating state information includes at least one of the total amount of ash and slag generated by coal combustion in the electric field, the equivalent length of the conveying pipeline section, the designed conveying output, the ash-gas ratio, the mass flow rate of the conveying air, the volume flow rate of the conveying air under standard conditions, the volume flow rate of the conveying air under working conditions, the gas-ash mixing temperature at the starting section of the conveying pipeline, the conveying speed of the pneumatic ash conveying pipeline, the diameter of the pneumatic ash conveying pipeline, the pipe friction resistance coefficient, the pressure loss, the volume of the air lock valve, the volume of the silo pump, the free air flow rate of the air compressor, the standard state volume flow rate of the air compressor, the total gas consumption of the air compressor system, the flow velocity of the compressed air, the inner diameter of the compressed air pipe, and the pressure loss of the compressed air pipeline; Determining the fault area of the positive pressure dense phase pneumatic conveying system according to the operating state information.

2. The fault detection method according to claim 1, wherein The determination of the operating state information of the positive pressure dense phase pneumatic conveying system includes: When the operating state information includes the total amount of ash and slag generated by coal combustion in the electric field, calculating the total amount of ash and slag generated by coal combustion in the electric field through a first calculation formula, and the first calculation formula is: G hz = B m × (A ar / 100 + Q net × q4 / 3387) Among them, G hz is the total amount of ash and slag generated by the electric field coal combustion, B m is the actual coal consumption under the maximum continuous evaporation capacity condition of each boiler, A ar is the ash content of the coal as received, Q net is the lower calorific value of the coal as received, and q4 is the mechanical incomplete combustion loss of the boiler.

3. The fault detection method according to claim 2, wherein The method further includes: Determining the amount of ash generated by coal combustion in the electric field according to the product of the total amount of ash and slag generated by coal combustion in the electric field and the fly ash distribution rate of coal combustion in the electric field; Determining the amount of slag generated by coal combustion in the electric field according to the product of the total amount of ash and slag generated by coal combustion in the electric field and the slag distribution rate of coal combustion in the electric field.

4. The fault detection method according to claim 1, characterized in that The determination of the operating state information of the positive pressure dense phase pneumatic conveying system includes: When the operating state information includes the equivalent length of the conveying pipeline section, calculating the equivalent length of the conveying pipeline section through a second calculation formula, and the second calculation formula is: L e = L + H + ∑nL r Among them, L e is the equivalent length of the said conveying pipe section, L is the total length of the horizontal conveying pipe section, H is the total length of the vertical conveying pipe section, n is the number of various pipeline accessories, and L r is the equivalent length of various pipeline accessories; When the operating state information includes the designed conveying output, determining the designed conveying output according to the product of the amount of ash generated by coal combustion in the electric field and the design margin coefficient; When the operating state information includes the ash-gas ratio, the ash-gas ratio is calculated by a third calculation formula. The ash-gas ratio is the ratio between the conveyed material quantity and the consumed gas quantity for conveying. The third calculation formula is as follows: where μ is the ash-gas ratio, β is the fly ash characteristic value, and L e is the equivalent length of the conveying pipe section.

5. The fault detection method according to claim 4, wherein The determination of the operating state information of the positive pressure dense phase pneumatic conveying system includes: When the operating state information includes the mass flow rate of the conveying air and the volume flow rate of the conveying air under standard conditions, determining the mass flow rate of the conveying air and the volume flow rate of the conveying air under standard conditions according to the ratio of the designed conveying output to the ash-gas ratio.

6. The fault detection method according to claim 5, characterized in that The determination of the operating state information of the positive pressure dense phase pneumatic conveying system includes: When the operating state information includes the volume flow rate of the conveying air under working conditions, calculating the volume flow rate of the conveying air under working conditions through a fourth calculation formula, and the fourth calculation formula is: q v = 12.89 × G / μ × P0 / P × (273 + t) / 273 where q v is the volume flow rate of the conveying air under the working condition, G is the designed conveying output, μ is the ash-air ratio, P0 is the atmospheric pressure under standard conditions, P is the absolute pressure at any point in the pipeline, and t is the temperature at any point in the pipeline; When the operating state information includes the gas-ash mixing temperature at the starting section of the conveying pipeline, calculating the gas-ash mixing temperature at the starting section of the conveying pipeline through a fifth calculation formula, and the fifth calculation formula is: t m = (G × c h × t h + G ma × c a × t a ) / (G × c h + G ma × c a ) where t m is the gas-ash mixed temperature at the starting section of the conveying pipeline, G is the designed conveying capacity, G ma is the mass flow rate of the conveyed air, c h is the specific heat capacity of dry ash, c a is the specific heat capacity of air, t h is the boiler flue gas temperature or the ash particle temperature, t a is the temperature of the conveying compressed air; When the operating state information includes the conveying speed of the pneumatic ash conveying pipeline, calculating the conveying speed of the pneumatic ash conveying pipeline through a sixth calculation formula, and the sixth calculation formula is: v = 0.0212 × q v / D 2 Among them, v is the conveying speed of the pneumatic ash conveying pipeline, D is the diameter of the pneumatic ash conveying pipeline, and q V is the air volume flow rate at the pipeline calculation point.

7. The fault detection method according to claim 1, wherein The determination of the operating state information of the positive pressure dense phase pneumatic conveying system includes: When the operating state information includes the pneumatic ash conveying pipe diameter, the pneumatic ash conveying pipe diameter is calculated by the seventh calculation formula, and the seventh calculation formula is as follows: Among them, D is the diameter of the pneumatic ash conveying pipeline, q V is the air volume flow rate at the pipeline calculation point, and v is the conveying speed of the pneumatic ash conveying pipeline; When the operating state information includes the pipeline friction resistance coefficient, the pipeline friction resistance coefficient is calculated by the eighth calculation formula, and the eighth calculation formula is as follows: Where λ is the pipe friction resistance coefficient, d is the inner diameter of the calculated pipeline, and ε is the average absolute roughness of the pipeline inner wall; When the operating state information includes the pressure loss, the pressure loss is calculated by the ninth calculation formula, and the ninth calculation formula is: △P = ∑△P L + △P P + △P0 + △P f Among them, △P is the pressure loss, △P L is the pipeline pressure loss, △P P is the equipment pressure loss, △P0 is the inlet pressure loss, △P f is the pressure loss of the bag filter.

8. The fault detection method according to claim 1, wherein The determining of the operating state information of the positive pressure dense phase pneumatic conveying system includes: When the operating state information includes the volume of the air lock valve, the volumes of the multiple air lock valves are calculated by the tenth calculation formula, and the tenth calculation formula is: V = G × [t + 0.4t(n - 1)] / 3600 × ρ d × k × E × n wherein, V is the volume of the airlock valve, G is the designed conveying output, ρ d is the ash accumulation density, k is the ash accumulation density coefficient in the gasification state, t is the opening time of the airlock bottom valve, E is the system efficiency coefficient, and n is the number of simultaneous discharges of the airlock valve; When the operating state information includes the volume of the bin pump, the volume of the bin pump is calculated by the eleventh calculation formula, and the eleventh calculation formula is: Among them, V P is the volume of the silo pump, G1 is the output of a single silo pump, ψ is the filling coefficient of the silo pump, ρ h is the bulk density of ash, t1 is the time required to fill a silo pump, and t2 is the time required to blow a silo pump; Alternatively, the bin pump volume is calculated by the twelfth calculation formula, and the twelfth calculation formula is: Wherein, G2 is the output of the double bin pump, and t3 is the pressure recovery time of the bin pump.

9. The fault detection method according to claim 1, wherein The determining of the operating state information of the positive pressure dense phase pneumatic conveying system includes: When the operating state information includes the free air flow rate of the air compressor, the free air flow rate of the air compressor is calculated by the thirteenth calculation formula, and the thirteenth calculation formula is: q f = P w / P×(273 + t / 273 + t0)×q e where q f is the free air flow rate of the air compressor, and q e is the compressed air volume flow rate at the air-using point, P w is the working pressure of the compressed air at the air-using point, P is the working pressure of the compressed air at the air-using point, t0 is the air temperature at the outlet of the air compressor, and t is the working ambient temperature of the air compressor; When the operating state information includes the standard state volume flow rate of the air compressor, the standard state volume flow rate of the air compressor is calculated by the fourteenth calculation formula, and the fourteenth calculation formula is: q N = P / P0 × (273.073 + t) × q f where q N is the standard-state volume flow rate of the air compressor, q f is the free air flow rate of the air compressor, P0 is the standard atmospheric pressure, P is the working environmental pressure of the air compressor, and t is the working environmental temperature of the air compressor; When the operating state information includes the total gas consumption of the air compressor system, the total gas consumption of the air compressor system is determined according to the sum of the total instrument air volume of the unit, the total compressed air volume for ash removal and transportation, and the gas volumes required by other compressed air users; Alternatively, the total gas consumption of the air compressor system is determined according to the sum of the stable gas volume and the fluctuating gas volume during the operation of the ash removal system; When the operating state information includes the compressed air flow rate, the compressed air flow rate is determined according to the working place and the use of the compressed air; When the operating state information includes the inner diameter of the compressed air pipe, the inner diameter of the compressed air pipe is calculated by the fifteenth calculation formula, and the fifteenth calculation formula is: where d k is the inner diameter of the compressed air pipe, q w is the volume flow rate of the compressed air during operation, and v is the flow velocity of the compressed air in the pipe state; Alternatively, the inner diameter of the compressed air pipe is calculated by the sixteenth calculation formula, and the sixteenth calculation formula is: where q s is the reference volume flow rate of compressed air, t is the ambient temperature at which the compressed air operates, and p is the operating pressure of the compressed air.

10. The fault detection method according to claim 1, characterized in that The determining of the operating state information of the positive pressure dense phase pneumatic conveying system includes: When the operating state information includes the pressure loss of the compressed air pipeline, determine the pressure loss of the compressed air pipeline according to the sum of the frictional resistance of the straight section of the compressed air pipeline and the local resistance of the compressed air pipeline; or, calculate the pressure loss of the compressed air pipeline through the seventeenth calculation formula, and the seventeenth calculation formula is: Wherein, ΔP is the pressure loss of the compressed air pipeline, λ is the pipeline friction resistance coefficient, L is the length of the straight compressed air pipeline, d is the inner diameter of the compressed air pipeline, ζ is the local resistance coefficient, v is the compressed air flow rate under the working state, g is the gravitational acceleration constant, and ρ is the compressed air density under the working state.

11. The fault detection method according to claim 1, wherein The method further includes: When the operating state information includes the total gas consumption of the air compressor system, the model and number of the air compressors used by the positive pressure dense phase pneumatic conveying system are determined according to the total gas consumption of the air compressor system.

12. A fault detection device, characterized in that, The device includes: A first determination module for determining the operating state information of the positive pressure dense phase pneumatic conveying system, where the operating state information includes at least one of the total amount of ash and slag generated by the electric field coal combustion, the equivalent length of the conveying pipe section, the conveying design output, the ash-gas ratio, the conveying air mass flow rate, the conveying air volume flow rate under the standard state, the conveying air volume flow rate under the working state, the gas-ash mixing temperature at the starting section of the conveying pipeline, the conveying speed of the pneumatic ash conveying pipeline, the pneumatic ash conveying pipe diameter, the pipeline friction resistance coefficient, the pressure loss, the volume of the air lock valve, the volume of the bin pump, the free air flow rate of the air compressor, the standard state volume flow rate of the air compressor, the total gas consumption of the air compressor system, the inner diameter of the compressed air pipe, and the pressure loss of the compressed air pipeline; A second determination module for determining the fault area of the positive pressure dense phase pneumatic conveying system according to the operating state information.

13. An electronic device, characterized in that, The electronic device includes: A processor, and A memory for storing processor-executable instructions, wherein the processor is configured to execute the fault detection method according to any one of claims 1-11 when calling the executable instructions in the memory.

14. A computer program comprising computer-readable code which, when run on a computing processing device, causes the computing processing device to execute the fault detection method according to any one of claims 1-11.

15. A computer-readable storage medium storing the computer program according to claim 14.

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