Method and device for judging blockage position of pulverized coal pipeline

Abstract

The invention discloses a method and device for judging the blockage position of a pulverized coal pipeline, and the method comprises the steps: dividing the pulverized coal pipeline into a preset number of pulverized coal pipe sections, and obtaining the pipeline section static pressure of the starting point and the ending point of the pulverized coal pipe sections; determining a first relation model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline section static pressure; determining a second relation model between the pulverized coal pipeline resistance and the pipeline resistance coefficient; determining a relation model of the fluid energy difference and the pipeline resistance coefficient according to the first relation model and the second relation model; and obtaining the resistance coefficient ratio of each pulverized coal pipe section based on the relation model of the fluid energy difference and the pipeline resistance coefficient. By monitoring the change of the fluid energy difference ratio of each pulverized coal pipe section, the change of the pipeline resistance coefficient ratio of each pulverized coal pipe section can be accurately judged, so that the blockage position and the blockage degree of the pulverized coal pipeline can be accurately judged.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline blockage judgment, and in particular to a method and device for judging the blockage position of a coal powder pipeline. Background Art

[0002] During the operation of power plant boilers, coal mills are the pulverizing equipment commonly used in boilers. Coal mills grind raw coal into pulverized coal and transport the pulverized coal to the boiler furnace for combustion through pulverized coal pipelines. During the operation of coal mills, if the pulverized coal pipeline at the outlet is too coarse, the primary air volume is too low, and the moisture content of the pulverized coal is too high, the pulverized coal pipeline may be blocked due to the deposition of pulverized coal in the horizontal section. In addition, there is a fire hazard when pulverized coal accumulates for a long time, causing the pulverized coal pipeline to burn or other safety accidents.

[0003] For the blockage of coal powder pipeline, the wind-powder online measurement technology is currently mainly used to measure the air flow velocity of the coal powder pipeline. When the flow velocity of the medium in the pipeline decreases, it is considered that there is a possibility of blockage in the pipeline. The wind-powder online measurement technology mainly includes pipeline differential pressure measurement and pipeline medium charge measurement. The sampling tube for pipeline differential pressure measurement is often blocked by coal powder and worn for a long time, resulting in large deviations in the measurement data. The pipeline medium charge measurement is affected by the coal quality, and the data is often invalid and seriously deviates from the true value. In addition, the existing wind-powder online measurement technology cannot truly reflect the location and degree of coal powder blockage, and can only be manually judged based on the trend. When the coal powder pipeline is seriously blocked, the coal powder pipeline blockage can only be handled after manual inspection and judgment.

[0004] This section is intended to provide a background or context to the embodiments of the invention recited in the claims. No admission is made that the description herein is prior art by inclusion in this section. Summary of the invention

[0005] The embodiment of the present invention provides a method for determining the blockage position of a pulverized coal pipeline, which is used to improve the accuracy of detecting the blockage position and blockage degree of the pulverized coal pipeline. The method includes:

[0006] Dividing the pulverized coal pipeline into a preset number of pulverized coal pipeline sections, and obtaining the pipeline cross-sectional static pressures at the starting point and the end point of the pulverized coal pipeline section;

[0007] Determine a first relationship model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline cross-section static pressure;

[0008] Obtaining the friction resistance and local resistance of the pulverized coal pipe section, and determining a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and local resistance;

[0009] Determine a relationship model between the fluid energy difference and the pipeline resistance coefficient according to the first relationship model and the second relationship model;

[0010] Obtaining the resistance coefficient ratio of each pulverized coal pipe section based on the relationship model between the fluid energy difference and the pipeline resistance coefficient;

[0011] According to the relationship between the resistance coefficient ratio of each pulverized coal pipe section and the preset threshold value, the pulverized coal pipe section at the blocked position is determined.

[0012] Further, the determining of the first relationship between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline cross-section static pressure includes:

[0013] Determine the pipeline cross-section static pressure difference of the pulverized coal pipe section according to the pipeline cross-section static pressures at the starting point and the end point of the pulverized coal pipe section;

[0014] A first relationship between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section is determined according to the pipeline cross-section static pressure difference, the fluid density in the pulverized coal pipeline section, the gravitational acceleration, and the height difference between the starting point and the end point of the pulverized coal pipeline section.

[0015] Further, the obtaining of the friction resistance and local resistance of the pulverized coal pipe section, and determining a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and local resistance, includes:

[0016] Determine the corresponding friction resistance and local resistance respectively according to the pre-established friction resistance model and local resistance model;

[0017] A second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient is determined according to the friction resistance and the local resistance.

[0018] Furthermore, the determining the corresponding friction resistance and local resistance respectively according to the pre-established friction resistance model and local resistance model includes:

[0019] Calculating the friction resistance according to the friction resistance coefficient of the pulverized coal pipeline, the parameters of the pulverized coal pipeline and the parameters of the fluid in the pulverized coal pipeline;

[0020] The local resistance is calculated according to the local resistance coefficient of the pulverized coal pipeline and the fluid parameters in the pulverized coal pipeline.

[0021] Furthermore, the resistance coefficient ratio of each pulverized coal pipe section is obtained based on the relationship model between the fluid energy difference and the pipeline resistance coefficient, including:

[0022] Determine a third relationship model between the fluid energy difference of each pulverized coal pipe section and the pipeline resistance coefficient according to the pipeline cross-section static pressure difference of each pulverized coal pipe section, the fluid density in the pipe section, the gravity acceleration, and the height difference between the starting point and the end point;

[0023] Determining a fourth relationship model between the fluid energy difference of a preset pulverized coal pipe section and the pipeline resistance coefficient based on the third relationship model;

[0024] Determining a set of fluid energy difference ratios between each pulverized coal pipe section and the preset pulverized coal pipe section according to the third relationship model and the fourth relationship model;

[0025] The resistance coefficient ratio of each pulverized coal pipe section is obtained according to the set of fluid energy difference ratios between each pulverized coal pipe section and the preset pulverized coal pipe section.

[0026] The embodiment of the present invention further provides a device for determining the blockage position of a pulverized coal pipeline, which is used to improve the accuracy of detecting the blockage position and blockage degree of the pulverized coal pipeline. The device includes:

[0027] A static pressure data acquisition module, used to divide the pulverized coal pipeline into a preset number of pulverized coal pipeline sections, and to acquire the pipeline cross-section static pressures at the start and end points of the pulverized coal pipeline sections;

[0028] A first pipeline resistance determination module, used to determine a first relationship model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline cross-section static pressure;

[0029] a second pipeline resistance determination module, configured to obtain the friction resistance and local resistance of the pulverized coal pipeline section, and determine a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and local resistance;

[0030] A pipeline resistance coefficient determination module, used to determine a relationship model between the fluid energy difference and the pipeline resistance coefficient according to the first relationship model and the second relationship model;

[0031] A resistance coefficient ratio determination module, used to obtain the resistance coefficient ratio of each pulverized coal pipe section based on the relationship model between the fluid energy difference and the pipeline resistance coefficient;

[0032] The logic judgment module is used to determine the pulverized coal pipe section in the blocked position according to the relationship between the resistance coefficient ratio of each pulverized coal pipe section and the preset threshold value.

[0033] Furthermore, the first pipeline resistance determination module includes:

[0034] a static pressure difference determining unit, configured to determine the static pressure difference of the pipeline cross section of the pulverized coal pipeline section according to the static pressure of the pipeline cross section at the starting point and the end point of the pulverized coal pipeline section;

[0035] The fluid energy difference determination unit is used to determine the first relationship between the pulverized coal pipeline resistance of the pulverized coal pipeline section and the fluid energy difference according to the static pressure difference of the pipeline cross section, the fluid density in the pulverized coal pipeline section, the gravitational acceleration, and the height difference between the starting point and the end point of the pulverized coal pipeline section.

[0036] Furthermore, the second pipeline resistance determination module includes:

[0037] A resistance determination unit, used to determine the corresponding friction resistance and local resistance respectively according to a pre-established friction resistance model and local resistance model;

[0038] The pipeline resistance coefficient unit is used to determine a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and the local resistance.

[0039] Further, the resistance determination unit comprises:

[0040] A friction resistance determination subunit, used to calculate the friction resistance according to the friction resistance coefficient of the pulverized coal pipeline, the pulverized coal pipeline parameters and the fluid parameters in the pulverized coal pipeline;

[0041] The local resistance determination subunit is used to calculate the local resistance according to the local resistance coefficient of the pulverized coal pipeline and the fluid parameters in the pulverized coal pipeline.

[0042] Furthermore, the drag coefficient ratio determination module includes:

[0043] A third relationship model determination unit, configured to determine a third relationship model between the fluid energy difference of each pulverized coal pipe section and the pipeline resistance coefficient according to the pipeline cross-section static pressure difference of each pulverized coal pipe section, the fluid density in the pipe section, the gravitational acceleration, and the height difference between the starting point and the end point;

[0044] a fourth relationship model determination unit, configured to determine a fourth relationship model between a preset fluid energy difference of a pulverized coal pipe section and the pipeline resistance coefficient based on the third relationship model;

[0045] a fluid energy difference ratio determination unit, configured to determine a set of fluid energy difference ratios between each pulverized coal pipe section and the preset pulverized coal pipe section according to the third relationship model and the fourth relationship model;

[0046] The resistance coefficient ratio determination unit is used to obtain the resistance coefficient ratio of each pulverized coal pipe section according to the fluid energy difference ratio set between each pulverized coal pipe section and the preset pulverized coal pipe section.

[0047] An embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method for determining the blockage position of a pulverized coal pipeline when executing the computer program.

[0048] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned method for determining the blockage position of a pulverized coal pipeline is implemented.

[0049] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the method for determining the blockage position of a pulverized coal pipeline is implemented.

[0050] A method and device for determining the location of a pulverized coal pipeline blockage provided by an embodiment of the present invention divides the pulverized coal pipeline at the outlet of a coal mill into a preset number of pulverized coal pipeline sections. A first relationship model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section is determined. A second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient is determined based on the friction resistance and the local resistance. The ratio of the fluid energy difference of each pulverized coal pipeline section is equal to the ratio of the sum of the friction resistance and the local resistance of each pulverized coal pipeline section. Since the fluid density of different cross sections of the same pulverized coal pipeline is approximately equal, the fluid flow rate is approximately equal, and the fluid powder concentration is equal, the ratio of the sum of the friction resistance and the local resistance of each pulverized coal pipeline section is equal to the ratio of the pipeline resistance coefficients of each pulverized coal pipeline section. When any pulverized coal pipeline section of the pulverized coal pipeline is blocked, the pipeline resistance coefficient of the pulverized coal pipeline section will change, that is, the ratio of the fluid energy difference of the pulverized coal pipeline section to the fluid energy difference of the remaining pulverized coal pipeline sections changes. By monitoring the changes in the fluid energy difference ratio of each pulverized coal pipe section, the changes in the pipeline resistance coefficient ratio of each pulverized coal pipe section can be accurately determined, thereby accurately determining the location and degree of blockage in the pulverized coal pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0052] Figure 1 It is a flow chart of a method for determining a blockage position of a pulverized coal pipeline in one embodiment of the present invention;

[0053] Figure 2 This is a schematic diagram of the pulverized coal pipeline segmentation in an embodiment of the present invention;

[0054] Figure 3 Schematic diagram of the opening of the wall static pressure monitoring point of the pulverized coal pipeline in the embodiment of the present invention;

[0055] Figure 4It is a flow chart of a method for determining a blockage position of a pulverized coal pipeline in another embodiment of the present invention;

[0056] Figure 5 It is a flow chart of a method for determining a blockage position of a pulverized coal pipeline in another embodiment of the present invention;

[0057] Figure 6 It is a flow chart of a method for determining a blockage position of a pulverized coal pipeline in another embodiment of the present invention;

[0058] Figure 7 It is a flow chart of a method for determining a blockage position of a pulverized coal pipeline in another embodiment of the present invention;

[0059] Figure 8 It is a schematic diagram of the flow chart of a device for determining the blockage position of a pulverized coal pipeline in one embodiment of the present invention;

[0060] Fig. 9 A schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0061] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0062] The information collected in the technical solution of this application is information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure and application of relevant data comply with the relevant laws, regulations and standards of relevant countries and regions, take necessary confidentiality measures, do not violate public order and good morals, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0063] Provide users with corresponding operation entrances for them to choose to agree or reject the automated decision-making results; if the user chooses to reject, the expert decision-making process will be entered.

[0064] In order to improve the accuracy of detecting the location and degree of blockage in a pulverized coal pipeline, the present invention provides a method for determining the location of blockage in a pulverized coal pipeline. The method may be executed by a background server. Figure 1 FIG. 2 is a flow chart of a method for determining the location of a pulverized coal pipeline blockage according to an embodiment of the present invention. Figure 1 As shown, the method for determining the blockage position of the pulverized coal pipeline includes: steps 101 to 106.

[0065] Step 101: Divide the pulverized coal pipeline into a preset number of pulverized coal pipeline sections, and obtain the pipeline cross-sectional static pressures at the start and end points of the pulverized coal pipeline sections.

[0066] Step 102: Determine a first relationship model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline cross-section static pressure.

[0067] Step 103: Obtain the friction resistance and local resistance of the pulverized coal pipe section, and determine a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and the local resistance.

[0068] Step 104: Determine a relationship model between the fluid energy difference and the pipeline resistance coefficient according to the first relationship model and the second relationship model.

[0069] Step 105: Obtain the resistance coefficient ratio of each pulverized coal pipe section based on the relationship model between the fluid energy difference and the pipeline resistance coefficient.

[0070] Step 106: Determine the pulverized coal pipe section at the blocked position according to the relationship between the pipeline resistance coefficient ratio of each pulverized coal pipe section and the preset threshold value.

[0071] from Figure 1 It can be seen from the process shown that in the embodiment of the present invention, the pulverized coal pipeline at the outlet of the coal mill is divided into a preset number of pulverized coal pipe sections. The first relationship model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section is determined. And the second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient is determined based on the friction resistance and the local resistance. The ratio of the fluid energy difference of each pulverized coal pipeline section is equal to the ratio of the sum of the friction resistance and the local resistance of each pulverized coal pipeline section. Since the fluid density of different cross-sections of the same pulverized coal pipeline is roughly equal, the fluid flow rate is roughly equal, and the fluid powder concentration is equal, the ratio of the sum of the friction resistance and the local resistance of each pulverized coal pipeline section is equal to the ratio of the pipeline resistance coefficients of each pulverized coal pipeline section. When any pulverized coal pipeline section of the pulverized coal pipeline is blocked, the pipeline resistance coefficient of the pulverized coal pipeline section will change, that is, the ratio of the fluid energy difference of the pulverized coal pipeline section to the fluid energy difference of the remaining pulverized coal pipeline sections changes. By monitoring the changes in the fluid energy difference ratio of each pulverized coal pipe section, the changes in the pipeline resistance coefficient ratio of each pulverized coal pipe section can be accurately determined, thereby accurately determining the location and degree of blockage in the pulverized coal pipeline.

[0072] like Figure 1 As shown, each step is explained in detail below.

[0073] Step 101: Divide the pulverized coal pipeline into a preset number of pulverized coal pipeline sections, and obtain the pipeline cross-sectional static pressures at the start and end points of the pulverized coal pipeline sections.

[0074] like Figure 2 As shown, the pulverized coal pipeline at the outlet of the coal mill is divided into n sections, and static pressure measuring devices are set at the starting point and end point of each pulverized coal pipeline section to measure the static pressure of the cross section at the starting point and end point of each pulverized coal pipeline section.

[0075] In one embodiment, the static pressure measuring device on the pulverized coal pipeline can be used to measure the static pressure of the fluid (ie, pure air or air-powder mixture) inside the pulverized coal pipeline, thereby facilitating the subsequent determination of the pulverized coal pipeline resistance.

[0076] In one embodiment, p j0 is the static pressure of section 0 at the starting point of the first pulverized coal pipe section, p j1 is the static pressure of section 1 at the end of the first pulverized coal pipe section. j2 is the static pressure of section 2 at the end of the second pulverized coal pipe section, ..., p jn-2 is the static pressure of section n-2 at the starting point of the n-1 pulverized coal pipe section, p jn-1 is the static pressure of section n-1 at the end of the n-1 pulverized coal pipe section. jn is the static pressure of section n at the end of the nth pulverized coal pipe section. The unit of the cross-sectional static pressure of the pulverized coal pipe section is Pa.

[0077] like Figure 3 As shown, a hole 301 is opened on the pulverized coal pipeline at the outlet of the coal mill, and a pressure transmitter is arranged at the hole 301. The static pressure of each pulverized coal pipe section of the pulverized coal pipeline at the outlet of the coal mill is obtained by converting the pressure signal detected by the pressure transmitter into an electrical signal and transmitting it to the static pressure data acquisition module.

[0078] Specifically, by setting an opening 301 on the wall of the pulverized coal pipeline, the static pressure of a certain section of the pulverized coal pipeline can be measured. No less than two static pressure detection points should be set along the circumference of the wall of the pulverized coal pipeline, and the average value should be calculated after individual measurements between each detection point to ensure the accuracy of the static pressure measurement. The distance between the two static pressure measurement sections of the same pulverized coal pipeline should be set at more than 5 meters to ensure that the static pressure values ​​of the two sections have a significant difference.

[0079] In one embodiment, the diameter of the wall opening 301 of the pulverized coal pipeline can be set to Φ4 mm, and the inner wall opening 301 of the pulverized coal pipeline should be smooth and free of burrs.

[0080] In one embodiment, a compressed air device is provided at the opening 301 of the pulverized coal pipeline ( Figure 3 (not shown in the figure), the static pressure opening 301 is back-blown with compressed air device regularly to prevent the static pressure opening 301 from being blocked. At the same time, the fluid in the pulverized coal pipeline can be disturbed by back-blowing the static pressure opening 301 with compressed air device, so that the pulverized coal in the pulverized coal pipe section at the static pressure opening 301 is not easily deposited and blocked.

[0081] Step 102: Determine a first relationship model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline cross-section static pressure.

[0082] like Figure 4As shown, step 102 includes: step 401 to step 402.

[0083] Step 401: Determine the pipeline cross-section static pressure difference of the pulverized coal pipeline section according to the pipeline cross-section static pressures at the starting point and the end point of the pulverized coal pipeline section.

[0084] Specifically, Figure 2 As shown in the figure, the static pressure difference of the pipeline section of the first pulverized coal pipeline is p j0 -p j1 , the static pressure difference of the pipeline section of the second pulverized coal pipeline is p j1 -p j2 , ..., the static pressure difference of the pipeline section of the n-1th pulverized coal pipeline section is p jn-2 -p jn-1 , the static pressure difference of the pipeline section of the nth pulverized coal pipeline is p jn-1 -p jn The unit of static pressure difference in the pipe section is Pa.

[0085] Step 402: Determine a first relationship between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline cross-section static pressure difference, the fluid density in the pulverized coal pipeline section, the gravitational acceleration and the height difference between the starting point and the end point of the pulverized coal pipeline section.

[0086] Specifically, Δp1 is the pulverized coal pipeline resistance of the first pulverized coal pipeline section, Δp2 is the pulverized coal pipeline resistance of the second pulverized coal pipeline section, ..., Δp n-1 is the pulverized coal pipeline resistance of the n-1th pulverized coal pipeline section, Δp n is the pulverized coal pipeline resistance of the nth pulverized coal pipeline section. The unit of the pulverized coal pipeline resistance is Pa.

[0087] According to the law of conservation of energy, the energy relationship formula between any two sections of the same pulverized coal pipeline can be obtained. For ease of description, the present invention takes sections 0 and 1 of the pulverized coal pipeline as an example for description.

[0088]

[0089] Among them, p j0 is the static pressure of the pipe at section 0, in Pa. ρ0 is the fluid density at section 0, in kg / m 3 ω0 is the fluid velocity at section 0, in m / s. g is the acceleration due to gravity, 9.8 m / s 2 h0 is the height of section 0, in meters. j1 is the static pressure of the pipe at section 1, in Pa. ρ1 is the fluid density at section 1, in kg / m 3 ω1 is the fluid velocity at section 1, in m / s. h1 is the height at section 1, in m. Δp1 is the resistance of the first section of the pulverized coal pipe, in Pa.

[0090] In one embodiment, the calculation formula of the fluid density ρ0 at section 0 is as follows:

[0091]

[0092] Where ρ0 is the fluid density at section 0, in kg / m 3 ρ is the density of the fluid in the pulverized coal pipeline under standard conditions, in kg / m 3 . p am is atmospheric pressure, unit is Pa. j0 is the static pressure of the pipe at section 0, in Pa. t0 is the fluid temperature at section 0, in °C.

[0093] In one embodiment, the calculation formula of the fluid density ρ1 at the section 1 is as follows:

[0094]

[0095] Where ρ1 is the fluid density at section 1, in kg / m 3 ρ is the density of the fluid in the pulverized coal pipeline under standard conditions, in kg / m 3 . p am is atmospheric pressure, unit is Pa. j1 is the static pressure of the pipe at section 1, in Pa. t1 is the fluid temperature at section 1, in °C.

[0096] In one embodiment, the density ρ of the fluid in the pulverized coal pipeline under standard conditions needs to be calculated by collecting real-time operation data of the coal mill. The specific calculation method can refer to DL / T 467-2019 "Performance Test of Power Plant Coal Mill and Pulverizing System".

[0097] Since there are multiple pulverized coal pipelines from the pulverizer outlet to the boiler furnace, the inner diameter of each pulverized coal pipeline from the pulverizer outlet to the boiler furnace is consistent and there are no branches, so the fluid flowing through each cross-section of the same pulverized coal pipeline is consistent.

[0098] When the fluid flows in the same pulverized coal pipeline, the temperature and absolute pressure of the fluid do not change significantly. Formula (2) and formula (3) can be used to calculate that the fluid density of different cross-sections in the same pulverized coal pipeline is roughly equal, that is, ρ0≈ρ1.

[0099] In one embodiment, let the fluid density coefficient Thus, formula (2) and formula (3) are simplified to ρ0=k×ρ, ρ1=k×ρ.

[0100] Since the fluid flowing through different sections of the same pulverized coal pipeline is consistent, the mass flow rate of the fluid in different sections of the pulverized coal pipeline is consistent. And because the fluid density of the fluid in different sections of the same pulverized coal pipeline is roughly equal, the volume flow rate of the fluid in each section of the pulverized coal pipeline is roughly equal, so the fluid flow rate in each section of the pulverized coal pipeline is roughly equal, that is, ω0≈ω1.

[0101] Since ρ0=k×ρ, ρ1=k×ρ and ω0≈ω1, formula (1) can be simplified to obtain formula (4).

[0102] Δp1=p j0 -p j1 +k×ρ×g×h0-k×ρ×g×h1 (4)

[0103] Let Δh1=h0-h1, and simplify formula (4) to obtain formula (5), that is, the resistance of the pulverized coal pipeline is equal to the fluid energy difference between the starting point and the end point of the pulverized coal pipeline section.

[0104] Δp1=p j0 -p j1 +k×ρ×g×Δh1 (5)

[0105] Among them, Δh1 is the height difference between the starting point and the end point of the first pulverized coal pipe section.

[0106] Step 103: Obtain the friction resistance and local resistance of the pulverized coal pipe section, and determine a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and the local resistance.

[0107] Specifically, the fluid in the pulverized coal pipeline is usually pure air or a mixture of air and pulverized coal, that is, a non-ideal fluid. When the fluid flows in the pulverized coal pipeline, it will be subject to friction resistance and local resistance.

[0108] like Figure 5 As shown, step 103 includes steps 501 to 502.

[0109] Step 501: Determine the corresponding friction resistance and local resistance respectively according to the pre-established friction resistance model and local resistance model.

[0110] like Figure 6 As shown, step 501 includes steps 601 to 602.

[0111] Step 601: Calculate the friction resistance according to the friction resistance coefficient of the pulverized coal pipeline, the pulverized coal pipeline parameters and the fluid parameters in the pulverized coal pipeline. The pulverized coal pipeline parameters include: the friction resistance calculation length of the pulverized coal pipeline and the equivalent diameter of the pulverized coal pipeline. The fluid parameters in the pulverized coal pipeline include: the concentration of powdered gas in the fluid in the pulverized coal pipeline, the fluid density at the cross section and the fluid flow rate at the cross section.

[0112] In one embodiment, the friction resistance of the first pulverized coal pipe section can be calculated by formula (6), and the calculation method of the friction resistance of the remaining pulverized coal pipe sections is the same.

[0113]

[0114] Among them, p λ1 is the friction resistance of the first section of the pulverized coal pipe, in Pa. μ1 is the concentration of powdered gas in the fluid of the first section of the pulverized coal pipe, in kg / kg. λ1 is the friction resistance coefficient of the first section of the pulverized coal pipe when pure air flows, and the friction resistance coefficient is usually taken as 0.015. L1 is the friction resistance calculation length of the first section of the pulverized coal pipe, in m. D1 is the equivalent diameter of the first section of the pulverized coal pipe, in m. ρ1 is the fluid density at section 1, in kg / m 3 ω1 is the fluid velocity at section 1, in m / s.

[0115] Step 602: Calculate the local resistance according to the local resistance coefficient of the pulverized coal pipeline and the fluid parameters in the pulverized coal pipeline, wherein the fluid parameters in the pulverized coal pipeline include: the concentration of gas containing powder in the fluid in the pulverized coal pipeline, the fluid density at the cross section and the fluid flow rate at the cross section.

[0116] In one embodiment, the local resistance of the first pulverized coal pipe section can be calculated by formula (7), and the calculation method of the local resistance of the remaining pulverized coal pipe sections is the same.

[0117]

[0118] Among them, p ζ1 is the local resistance of the first section of the pulverized coal pipe, in Pa. μ1 is the concentration of gas containing powder in the first section of the pulverized coal pipe, in kg / kg. ζ1 is the local resistance coefficient of pure air flow in the first section of the pulverized coal pipe. ρ1 is the fluid density at section 1, in kg / m 3 ω1 is the fluid velocity at section 1, in m / s.

[0119] Step 502: Determine a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and the local resistance, wherein the pulverized coal pipeline resistance is the sum of the friction resistance and the local resistance.

[0120]

[0121] Among them, Δp1 is the resistance of the first section of pulverized coal pipe, in Pa. λ1 is the friction resistance of the first section of the pulverized coal pipe, in Pa. ζ1is the local resistance of the first section of the pulverized coal pipe, in Pa. μ1 is the concentration of powdered gas in the fluid of the first section of the pulverized coal pipe, in kg / kg. λ1 is the friction resistance coefficient of the first section of the pulverized coal pipe when pure air flows, and the friction resistance coefficient is usually taken as 0.015. L1 is the friction resistance calculation length of the first section of the pulverized coal pipe, in m. D1 is the equivalent diameter of the first section of the pulverized coal pipe, in m. ζ1 is the local resistance coefficient of the first section of the pulverized coal pipe when pure air flows. ρ1 is the fluid density at section 1, in kg / m 3 ω1 is the fluid velocity at section 1, in m / s.

[0122] Let the pipeline resistance coefficient of the first section of pulverized coal pipeline be Thus, formula (8) is simplified to obtain formula (9).

[0123]

[0124] Among them, C1 is the pipeline resistance coefficient of the first pulverized coal pipe section.

[0125] In one embodiment, the calculation method of the pulverized coal pipeline resistance coefficient can refer to DL / T 5145-2012 "Technical Regulations for Design and Calculation of Pulverized Coal System in Thermal Power Plants".

[0126] Step 104: Determine a relationship model between the fluid energy difference and the pipeline resistance coefficient according to the first relationship model and the second relationship model.

[0127] Specifically, formula (10) is obtained by combining formula (5) and formula (9).

[0128]

[0129] Among them, Δp1 is the resistance of the first section of pulverized coal pipe, in Pa. j0 is the static pressure of the pipe at section 0, in Pa. j1 is the static pressure of the pipeline at section 1, in Pa. k is the fluid density coefficient. ρ is the density of the fluid in the pulverized coal pipeline under standard conditions, in kg / m 3 . g is the acceleration due to gravity, 9.8m / s 2 . Δh1 is the height difference between the starting point and the end point of the first section of the pulverized coal pipe. C1 is the pipeline resistance coefficient of the first section of the pulverized coal pipe. μ1 is the concentration of pulverized gas in the fluid of the first section of the pulverized coal pipe, in kg / kg. ρ1 is the fluid density at section 1, in kg / m 3 ω1 is the fluid velocity at section 1, in m / s.

[0130] Step 105: Obtain the resistance coefficient ratio of each pulverized coal pipe section based on the relationship model between the fluid energy difference and the pipeline resistance coefficient.

[0131] like Figure 7 As shown, step 105 includes steps 701 to 704 .

[0132] Step 701: Determine a third relationship model between the fluid energy difference and the pipeline resistance coefficient of each pulverized coal pipe section according to the pipeline cross-section static pressure difference of each pulverized coal pipe section, the fluid density in the pipe section, the gravity acceleration, and the height difference between the starting point and the end point.

[0133] Specifically, according to formula (10), Figure 2 The formula group (11) for the fluid energy difference and pipeline resistance coefficient of each pulverized coal pipe section.

[0134]

[0135] Among them, Δp1 is the resistance of the first section of the pulverized coal pipe, Δp2 is the resistance of the second section of the pulverized coal pipe, ..., Δp n is the resistance of the nth section of the pulverized coal pipe. j0 is the static pressure of section 0 at the starting point of the first pulverized coal pipe section, p j1 is the static pressure of section 1 at the end of the first pulverized coal pipe section, p j2 is the static pressure of section 2 at the end of the second pulverized coal pipe section, ..., p jn-1 is the static pressure of section n-1 at the end of the n-1th pulverized coal pipe section, p jn is the static pressure of section n at the end of the nth section of the pulverized coal pipeline. k is the fluid density coefficient. ρ is the density of the fluid in the pulverized coal pipeline under standard conditions, in kg / m 3 . g is the acceleration due to gravity, 9.8m / s 2 Δh1 is the height difference between the starting point and the end point of the first section of the pulverized coal pipe, Δh2 is the height difference between the starting point and the end point of the second section of the pulverized coal pipe, ..., Δh n is the height difference between the starting point and the end point of the nth section of the pulverized coal pipeline. C1 is the pipeline resistance coefficient of the first section of the pulverized coal pipeline, C2 is the pipeline resistance coefficient of the second section of the pulverized coal pipeline, ..., C n is the pipeline resistance coefficient of the nth section of the pulverized coal pipeline. μ1 is the concentration of gas containing powder in the fluid of the first section of the pulverized coal pipeline, μ2 is the concentration of gas containing powder in the fluid of the second section of the pulverized coal pipeline, …, μ n is the gas concentration of powdered coal in the nth section of the pulverized coal pipeline. ρ1 is the fluid density at section 1, ρ2 is the fluid density at section 2, ..., ρ n is the fluid density at section n. ω1 is the fluid velocity at section 1, ω2 is the fluid velocity at section 2, …, ω n is the fluid flow velocity at section n.

[0136] Step 702: Determine a fourth relationship model between the fluid energy difference and the pipeline resistance coefficient of a preset pulverized coal pipe section based on the third relationship model.

[0137] Specifically, the pipeline resistance coefficient C of the xth section of the pulverized coal pipeline is selected as x As the reference pipeline resistance coefficient, the xth section of the pulverized coal pipeline is a vertical pipeline. Since vertical pipelines are not prone to blockage, the pipeline resistance coefficient is not prone to change.

[0138] The formula (12) for the fluid energy difference and pipeline resistance coefficient of the xth section of the pulverized coal pipeline is:

[0139]

[0140] Among them, Δp x is the resistance of the xth section of the pulverized coal pipe, in Pa. jx-1 is the static pressure of the pulverized coal pipeline at the cross section x-1, in Pa. jx is the static pressure of the pulverized coal pipeline at the cross section x, in Pa. k is the fluid density coefficient. ρ is the density of the fluid in the pulverized coal pipeline under standard conditions, in kg / m 3 . g is the acceleration due to gravity, 9.8m / s 2 . Δh x is the height difference between the starting point and the end point of the x-th pulverized coal pipe section. x is the pipeline resistance coefficient of the xth section of the pulverized coal pipeline. x is the gas concentration of powdered coal in the xth section of the pulverized coal pipeline, in kg / kg. x is the fluid density at section x, in kg / m 3 ω x is the fluid velocity at section x, in m / s.

[0141] Step 703: Determine a set of fluid energy difference ratios between each pulverized coal pipe section and a preset pulverized coal pipe section according to the third relationship model and the fourth relationship model.

[0142] Specifically, the fluid energy difference ratio between each pulverized coal pipe section and the selected x-th pulverized coal pipe section can be calculated according to formula group (11) and formula (12). Taking the fluid energy difference of the x-th (1≤x≤n) pulverized coal pipe section as the denominator and the fluid energy difference of the remaining pulverized coal pipe sections as the numerator, the fluid energy difference ratio formula group (13) can be obtained.

[0143]

[0144] Among them, Δp1 is the resistance of the first section of the pulverized coal pipe, Δp2 is the resistance of the second section of the pulverized coal pipe, ..., Δp n is the resistance of the nth section of the pulverized coal pipe. j0 is the static pressure of section 0 at the starting point of the first pulverized coal pipe section, p j1 is the static pressure of section 1 at the end of the first pulverized coal pipe section, pj2 is the static pressure of section 2 at the end of the second pulverized coal pipe section, ..., p jn-1 is the static pressure of section n-1 at the end of the n-1th pulverized coal pipe section, p jn is the static pressure of section n at the end of the nth section of the pulverized coal pipe. Δh1 is the height difference between the start and end of the first section of the pulverized coal pipe, Δh2 is the height difference between the start and end of the second section of the pulverized coal pipe, ..., Δh n is the height difference between the starting point and the end point of the nth section of the pulverized coal pipeline. C1 is the pipeline resistance coefficient of the first section of the pulverized coal pipeline, C2 is the pipeline resistance coefficient of the second section of the pulverized coal pipeline, ..., C n is the pipeline resistance coefficient of the nth section of the pulverized coal pipeline. μ1 is the concentration of gas containing powder in the fluid of the first section of the pulverized coal pipeline, μ2 is the concentration of gas containing powder in the fluid of the second section of the pulverized coal pipeline, …, μ n is the gas concentration of powdered coal in the nth section of the pulverized coal pipeline. ρ1 is the fluid density at section 1, ρ2 is the fluid density at section 2, ..., ρ n is the fluid density at section n. ω1 is the fluid velocity at section 1, ω2 is the fluid velocity at section 2, …, ω n is the fluid velocity at section n. Δp x is the resistance of the xth section of the pulverized coal pipe, in Pa. jx-1 is the static pressure of the pulverized coal pipeline at the cross section x-1, in Pa. jx Δh is the static pressure of the pulverized coal pipeline at the cross section x, in Pa. x is the height difference between the starting point and the end point of the xth pulverized coal pipe section, in meters. x is the pipeline resistance coefficient of the xth section of the pulverized coal pipeline. x is the gas concentration of powdered coal in the xth section of the pulverized coal pipeline, in kg / kg. x is the fluid density at section x, in kg / m 3 ω x is the fluid velocity at section x, in m / s. k is the fluid density coefficient. ρ is the density of the fluid in the pulverized coal pipeline under standard conditions, in kg / m 3 . g is the acceleration due to gravity, 9.8m / s 2 .

[0145] Step 704: Obtain the resistance coefficient ratio of each pulverized coal pipe section according to the set of fluid energy difference ratios between each pulverized coal pipe section and a preset pulverized coal pipe section.

[0146] Specifically, since the fluid density of different cross sections in the same pulverized coal pipeline is roughly equal, ρ1≈ρ2≈…≈ρ n Since the fluid density in different cross sections of the same pulverized coal pipeline is roughly the same, the fluid flow rate in each cross section of the pulverized coal pipeline is roughly the same, that is, ω1≈ω2≈…≈ωn .

[0147] Therefore, formula group (13) can be simplified to formula group (14).

[0148]

[0149] Among them, p j0 is the static pressure of section 0 at the starting point of the first pulverized coal pipe section, p j1 is the static pressure of section 1 at the end of the first pulverized coal pipe section, p j2 is the static pressure of section 2 at the end of the second pulverized coal pipe section, ..., p jn-1 is the static pressure of section n-1 at the end of the n-1th pulverized coal pipe section, p jn is the static pressure of section n at the end of the nth section of the pulverized coal pipe. Δh1 is the height difference between the start and end of the first section of the pulverized coal pipe, Δh2 is the height difference between the start and end of the second section of the pulverized coal pipe, ..., Δh n is the height difference between the starting point and the end point of the nth section of the pulverized coal pipeline. C1 is the pipeline resistance coefficient of the first section of the pulverized coal pipeline, C2 is the pipeline resistance coefficient of the second section of the pulverized coal pipeline, ..., C n is the pipeline resistance coefficient of the nth pulverized coal pipeline section. jx-1 is the static pressure of the pulverized coal pipeline at the cross section x-1, in Pa. jx Δh is the static pressure of the pulverized coal pipeline at the cross section x, in Pa. x is the height difference between the starting point and the end point of the xth pulverized coal pipe section, in meters. x is the pipeline resistance coefficient of the xth section of the pulverized coal pipeline. k is the fluid density coefficient. ρ is the density of the fluid in the pulverized coal pipeline under standard conditions, in kg / m 3 . g is the acceleration due to gravity, 9.8m / s 2 .

[0150] Step 106: Determine the pulverized coal pipe section at the blocked position according to the relationship between the pipeline resistance coefficient ratio of each pulverized coal pipe section and the preset threshold value.

[0151] Specifically, through formula group (14), it can be obtained that the ratio of the fluid energy difference of each pulverized coal pipe section of the same pulverized coal pipe is equal to the ratio of the pipeline resistance coefficients of each pulverized coal pipe section. By comparing the ratio of the pipeline resistance coefficients of each pulverized coal pipe section with the preset threshold, the pulverized coal pipe section in the blocked position can be determined.

[0152] When the pulverized coal pipe section is not blocked, the ratio of the pipeline resistance coefficient of each pulverized coal pipe section to the pipeline resistance coefficient of the preset pulverized coal pipe section is within the preset threshold, and therefore the ratio of the fluid energy difference of each pulverized coal pipe section to the fluid energy difference of the preset pulverized coal pipe section is also within the preset threshold.

[0153] When a pulverized coal pipe section in the pulverized coal pipeline is blocked, the pipeline resistance coefficient of the pulverized coal pipe section will change, that is, the ratio of the fluid energy difference of the pulverized coal pipe section to the preset fluid energy difference of the pulverized coal pipe section will exceed the preset threshold.

[0154] By monitoring the changes in the ratio of the fluid energy difference of each pulverized coal pipe section to the preset fluid energy difference of the pulverized coal pipe section, it is possible to accurately determine the changes in the ratio of the pipeline resistance coefficient of each pulverized coal pipe section to the preset pipeline resistance coefficient of the pulverized coal pipe section, thereby accurately determining the location and degree of blockage in the pulverized coal pipeline.

[0155] In the embodiment of the present invention, the pulverized coal pipeline at the outlet of the coal mill is divided into a preset number of pulverized coal pipe sections. A first relationship model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section is determined. And a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient is determined based on the friction resistance and the local resistance. The ratio of the fluid energy difference of each pulverized coal pipeline section is equal to the ratio of the sum of the friction resistance and the local resistance of each pulverized coal pipeline section. Since the fluid density of different cross sections of the same pulverized coal pipeline is approximately equal, the fluid flow rate is approximately equal, and the fluid powder concentration is equal, the ratio of the sum of the friction resistance and the local resistance of each pulverized coal pipeline section is equal to the ratio of the pipeline resistance coefficients of each pulverized coal pipeline section. When any pulverized coal pipeline section of the pulverized coal pipeline is blocked, the pipeline resistance coefficient of the pulverized coal pipeline section will change, that is, the ratio of the fluid energy difference of the pulverized coal pipeline section to the fluid energy difference of the remaining pulverized coal pipeline sections will change. By monitoring the changes in the fluid energy difference ratio of each pulverized coal pipe section, the changes in the pipeline resistance coefficient ratio of each pulverized coal pipe section can be accurately determined, thereby accurately determining the location and degree of blockage in the pulverized coal pipeline.

[0156] The present invention also provides a device for determining the location of a pulverized coal pipeline blockage, as described in the following embodiments. Since the principle of the device to solve the problem is similar to the method for determining the location of a pulverized coal pipeline blockage, the implementation of the device can refer to the implementation of the method for determining the location of a pulverized coal pipeline blockage, and the repeated parts will not be repeated.

[0157] like Figure 8 As shown, the pulverized coal pipeline blockage position determination device 800 includes: a static pressure data acquisition module 801, a first pipeline resistance determination module 802, a second pipeline resistance determination module 803, a pipeline resistance coefficient determination module 804, a resistance coefficient ratio determination module 805 and a logic judgment module 806.

[0158] The static pressure data acquisition module 801 is used to divide the pulverized coal pipeline into a preset number of pulverized coal pipeline segments, and to acquire the pipeline cross-section static pressures at the start and end points of the pulverized coal pipeline segments.

[0159] The first pipeline resistance determination module 802 is used to determine a first relationship model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline cross-section static pressure.

[0160] The second pipeline resistance determination module 803 is used to obtain the friction resistance and local resistance of the pulverized coal pipeline section, and determine a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and local resistance.

[0161] The pipeline resistance coefficient determination module 804 is used to determine the relationship model between the fluid energy difference and the pipeline resistance coefficient according to the first relationship model and the second relationship model.

[0162] The resistance coefficient ratio determination module 805 is used to obtain the resistance coefficient ratio of each pulverized coal pipe section based on the relationship model between the fluid energy difference and the pipeline resistance coefficient.

[0163] The logic judgment module 806 is used to determine the pulverized coal pipe section that is in a blocked position according to the relationship between the resistance coefficient ratio of each pulverized coal pipe section and a preset threshold value.

[0164] The first pipeline resistance determination module includes: a static pressure difference determination unit and a fluid energy difference determination unit.

[0165] The static pressure difference determination unit is used to determine the pipeline cross-section static pressure difference of the pulverized coal pipe section according to the pipeline cross-section static pressures at the starting point and the end point of the pulverized coal pipe section.

[0166] The fluid energy difference determination unit is used to determine the first relationship between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the static pressure difference of the pipeline cross section, the fluid density in the pulverized coal pipeline section, the gravitational acceleration, and the height difference between the starting point and the end point of the pulverized coal pipeline section.

[0167] The second pipeline resistance determination module includes: a resistance determination unit and a pipeline resistance coefficient unit.

[0168] The resistance determination unit is used to determine the corresponding friction resistance and local resistance respectively according to the pre-established friction resistance model and local resistance model.

[0169] The pipeline resistance coefficient unit is used to determine a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and the local resistance.

[0170] The resistance determination unit includes: a friction resistance determination subunit and a local resistance determination subunit.

[0171] The friction resistance determination subunit is used to calculate the friction resistance according to the friction resistance coefficient of the pulverized coal pipeline, the pulverized coal pipeline parameters and the fluid parameters in the pulverized coal pipeline.

[0172] The local resistance determination subunit is used to calculate the local resistance according to the local resistance coefficient of the pulverized coal pipeline and the fluid parameters in the pulverized coal pipeline.

[0173] The drag coefficient ratio determination module includes: a third relationship model determination unit, a fourth relationship model determination unit, a fluid energy difference ratio determination unit and a drag coefficient ratio determination unit.

[0174] The third relationship model determination unit is used to determine the third relationship model between the fluid energy difference of each coal powder pipe section and the pipeline resistance coefficient according to the pipeline cross-section static pressure difference of each coal powder pipe section, the fluid density in the pipe section, the gravity acceleration, and the height difference between the starting point and the end point.

[0175] The fourth relationship model determination unit is used to determine a fourth relationship model between the preset fluid energy difference of the pulverized coal pipe section and the pipeline resistance coefficient based on the third relationship model.

[0176] The fluid energy difference ratio determination unit is used to determine a set of fluid energy difference ratios between each pulverized coal pipe section and the preset pulverized coal pipe section according to the third relationship model and the fourth relationship model.

[0177] The resistance coefficient ratio determination unit is used to obtain the resistance coefficient ratio of each pulverized coal pipe section according to the fluid energy difference ratio set between each pulverized coal pipe section and the preset pulverized coal pipe section.

[0178] In one embodiment, when the logic judgment module determines that the pulverized coal pipe section is in a blocked position, the blockage alarm display module displays the blocked position and issues an alarm prompt.

[0179] Fig. 9 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention, such as Fig. 9 As shown, the electronic device 900 includes: a processor (processor) 901, a memory (memory) 902 and a bus 903.

[0180] The processor 901 and the memory 902 communicate with each other via a bus 903 .

[0181] The processor 901 is used to call the program instructions in the memory 902 to execute the methods provided by the above-mentioned method embodiments.

[0182] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned method for determining the blockage position of a pulverized coal pipeline is implemented.

[0183] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the method for determining the blockage position of a pulverized coal pipeline is implemented.

[0184] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0185] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0186] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0187] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0188] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for determining the location of a pulverized coal pipeline blockage, characterized in that: include: Dividing the pulverized coal pipeline into a preset number of pulverized coal pipeline sections, and obtaining the pipeline cross-sectional static pressures at the starting point and the end point of the pulverized coal pipeline section; Determine a first relationship model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline cross-section static pressure; Obtaining the friction resistance and local resistance of the pulverized coal pipe section, and determining a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and local resistance; Determine a relationship model between the fluid energy difference and the pipeline resistance coefficient according to the first relationship model and the second relationship model; Obtaining the resistance coefficient ratio of each pulverized coal pipe section based on the relationship model between the fluid energy difference and the pipeline resistance coefficient; According to the relationship between the resistance coefficient ratio of each pulverized coal pipe section and the preset threshold value, the pulverized coal pipe section at the blocked position is determined.

2. The method according to claim 1, characterized in that: The determining of the first relationship between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline cross-section static pressure includes: Determine the pipeline cross-section static pressure difference of the pulverized coal pipe section according to the pipeline cross-section static pressures at the starting point and the end point of the pulverized coal pipe section; A first relationship between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section is determined according to the pipeline cross-section static pressure difference, the fluid density in the pulverized coal pipeline section, the gravitational acceleration, and the height difference between the starting point and the end point of the pulverized coal pipeline section.

3. The method according to claim 1, characterized in that The obtaining of the friction resistance and the local resistance of the pulverized coal pipe section, and determining a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and the local resistance, comprises: Determine the corresponding friction resistance and local resistance respectively according to the pre-established friction resistance model and local resistance model; A second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient is determined according to the friction resistance and the local resistance.

4. The method according to claim 3, characterized in that The determining of the corresponding friction resistance and local resistance respectively according to the pre-established friction resistance model and local resistance model comprises: Calculating the friction resistance according to the friction resistance coefficient of the pulverized coal pipeline, the parameters of the pulverized coal pipeline and the parameters of the fluid in the pulverized coal pipeline; The local resistance is calculated according to the local resistance coefficient of the pulverized coal pipeline and the fluid parameters in the pulverized coal pipeline.

5. The method according to claim 1, characterized in that The method of obtaining the resistance coefficient ratio of each pulverized coal pipe section based on the relationship model between the fluid energy difference and the pipeline resistance coefficient includes: Determine a third relationship model between the fluid energy difference of each pulverized coal pipe section and the pipeline resistance coefficient according to the pipeline cross-section static pressure difference of each pulverized coal pipe section, the fluid density in the pipe section, the gravity acceleration, and the height difference between the starting point and the end point; Determining a fourth relationship model between the fluid energy difference of a preset pulverized coal pipe section and the pipeline resistance coefficient based on the third relationship model; Determining a set of fluid energy difference ratios between each pulverized coal pipe section and the preset pulverized coal pipe section according to the third relationship model and the fourth relationship model; The resistance coefficient ratio of each pulverized coal pipe section is obtained according to the set of fluid energy difference ratios between each pulverized coal pipe section and the preset pulverized coal pipe section.

6. A device for determining the location of a pulverized coal pipeline blockage, characterized in that: include: A static pressure data acquisition module, used to divide the pulverized coal pipeline into a preset number of pulverized coal pipeline sections, and measure the static pressure of the pipeline section at the starting point and the end point of the pulverized coal pipeline section; A first pipeline resistance determination module, used to determine a first relationship model between the pulverized coal pipeline resistance and the fluid energy difference of the pulverized coal pipeline section according to the pipeline cross-section static pressure; a second pipeline resistance determination module, configured to obtain the friction resistance and local resistance of the pulverized coal pipeline section, and determine a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and local resistance; A pipeline resistance coefficient determination module, used to determine a relationship model between the fluid energy difference and the pipeline resistance coefficient according to the first relationship model and the second relationship model; A resistance coefficient ratio determination module, used to obtain the resistance coefficient ratio of each pulverized coal pipe section based on the relationship model between the fluid energy difference and the pipeline resistance coefficient; The logic judgment module is used to determine the pulverized coal pipe section in the blocked position according to the relationship between the resistance coefficient ratio of each pulverized coal pipe section and the preset threshold value.

7. The device according to claim 6, characterized in that The first pipeline resistance determination module includes: a static pressure difference determining unit, configured to determine the static pressure difference of the pipeline cross section of the pulverized coal pipeline section according to the static pressure of the pipeline cross section at the starting point and the end point of the pulverized coal pipeline section; The fluid energy difference determination unit is used to determine the first relationship between the pulverized coal pipeline resistance of the pulverized coal pipeline section and the fluid energy difference according to the static pressure difference of the pipeline cross section, the fluid density in the pulverized coal pipeline section, the gravitational acceleration, and the height difference between the starting point and the end point of the pulverized coal pipeline section.

8. The device according to claim 6, characterized in that The second pipeline resistance determination module includes: A resistance determination unit, used to determine the corresponding friction resistance and local resistance respectively according to a pre-established friction resistance model and local resistance model; The pipeline resistance coefficient unit is used to determine a second relationship model between the pulverized coal pipeline resistance and the pipeline resistance coefficient according to the friction resistance and the local resistance.

9. The device according to claim 8, characterized in that The resistance determination unit comprises: A friction resistance determination subunit, used to calculate the friction resistance according to the friction resistance coefficient of the pulverized coal pipeline, the pulverized coal pipeline parameters and the fluid parameters in the pulverized coal pipeline; The local resistance determination subunit is used to calculate the local resistance according to the local resistance coefficient of the pulverized coal pipeline and the fluid parameters in the pulverized coal pipeline.

10. The device according to claim 6, characterized in that The drag coefficient ratio determination module includes: A third relationship model determination unit, configured to determine a third relationship model between the fluid energy difference of each pulverized coal pipe section and the pipeline resistance coefficient according to the pipeline cross-section static pressure difference of each pulverized coal pipe section, the fluid density in the pipe section, the gravitational acceleration, and the height difference between the starting point and the end point; a fourth relationship model determination unit, configured to determine a fourth relationship model between a preset fluid energy difference of a pulverized coal pipe section and the pipeline resistance coefficient based on the third relationship model; a fluid energy difference ratio determination unit, configured to determine a set of fluid energy difference ratios between each pulverized coal pipe section and the preset pulverized coal pipe section according to the third relationship model and the fourth relationship model; The resistance coefficient ratio determination unit is used to obtain the resistance coefficient ratio of each pulverized coal pipe section according to the fluid energy difference ratio set between each pulverized coal pipe section and the preset pulverized coal pipe section.

11. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 5 is implemented.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

13. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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