A method and apparatus for evaluating coal blending and combustion schemes.

Abstract

The present application relates to a kind of evaluation method of coal blending blending scheme, first according to the sampling value of several basic parameters in the coal blending scheme to be evaluated to determine a comparison threshold value;Subsequently, by the most matching feasible and abnormal coal blending scheme in the history coal blending database with current scheme, and the equipment state of the coal blending scheme in actual combustion process are analyzed, further to the comparison threshold value is revised, compensation;Finally, by the actual comparison value obtained by the basic parameter measurement value after the actual combustion of the coal blending scheme is compared with the comparison threshold value after revision, compensation, the feasibility of the coal blending scheme is determined.The method simplifies the evaluation process of coal blending scheme, provides strong technical support for coal blending blending, and helps to optimize the whole coal blending blending process.

Description

Technical Field

[0001] This invention relates to the field of coal-fired power generation technology, and more specifically, to a method and apparatus for evaluating coal blending schemes. Background Technology

[0002] The coal blending evaluation method and device are mainly applied in the field of coal-fired power generation. Its core function is to maximize the utilization of coal resources, reduce production costs, and improve power generation efficiency by scientifically and rationally evaluating the effects of mixed combustion of different coal types. During coal-fired power generation, the system generates the most economical, environmentally friendly, and comprehensively optimal blending scheme through precise calculations, lean implementation, and meticulous management. It supports linear and nonlinear algorithms (neural networks), providing various methods such as simulated blending and economic blending. Based on the power plant load, it automatically generates a blending list, forms an optimal ranking, monitors the impact of blended coal on the boiler, and optimizes the blending model.

[0003] The main drawback of existing technologies lies in the inability to determine or select a reliable blending scheme when multiple types of coal are blended for combustion. This leads to unstable boiler combustion, reduced generator output, or even shutdown accidents, as well as lower economic efficiency, safety, and environmental impact of power plant operation. Furthermore, existing systems may lack in-depth analysis and evaluation of the differences in the physicochemical properties of coal types, such as calorific value, ash content, and sulfur content. These differences directly affect combustion efficiency, pollutant emissions, and equipment wear.

[0004] Therefore, how to scientifically and rationally evaluate the effects of coal blending and combustion has become an urgent problem to be solved in the field of coal-fired power generation. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to overcome the defects or deficiencies of the prior art and to provide an evaluation method and apparatus for coal blending schemes, aiming to solve the problems of lack of systematic evaluation means for coal blending schemes and inaccurate effect evaluation in the current technology.

[0006] An evaluation method for coal blending schemes includes:

[0007] S10 acquires relevant parameter sampling values ​​of the coal blending scheme to be evaluated, and calculates the initial comparison threshold T0 based on the relevant parameter sampling values;

[0008] S20, based on the coal blending scheme and its corresponding initial comparison threshold T0, retrieves the corresponding feasible coal blending scheme and abnormal coal blending scheme from the historical coal blending scheme record database, calculates the deviation coefficient H between the coal blending scheme and the retrieved historical coal blending scheme, and determines whether the deviation coefficient H is greater than the deviation coefficient threshold H0:

[0009] If so, the initial comparison threshold T0 is corrected, and the corrected initial comparison threshold T0 is equal to the intermediate comparison threshold T.X ;

[0010] If not, then the initial comparison threshold T0 is not modified, and the initial comparison threshold T0 is equal to the intermediate comparison threshold T. X ;

[0011] S30 obtains several actual state values ​​D of the actual combustion equipment in the coal blending scheme. a Determine the actual state value D a Is it greater than its corresponding standard state value D0?

[0012] If so, then the intermediate comparison threshold T needs to be adjusted. X Compensation is performed, and the intermediate comparison threshold T after compensation is determined. X Equal to comparison threshold T B ;

[0013] If not, then no intermediate comparison threshold T is required. X Compensation is performed, with an intermediate comparison threshold T. X Equal to comparison threshold T B ;

[0014] S40 obtains the actual values ​​of relevant parameters after the actual combustion of the coal blending scheme, and obtains an actual comparison value T based on the actual values ​​of the relevant parameters, and determines whether the actual comparison value T is less than or equal to the comparison threshold T. B :

[0015] If the actual comparison value T is less than or equal to the comparison threshold T B If so, the coal blending scheme is deemed feasible;

[0016] If the actual comparison value T is greater than the comparison threshold T B If the coal blending scheme is deemed infeasible, then the coal blending scheme is determined to be infeasible.

[0017] Compared to existing technologies, this invention proposes an evaluation method for coal blending schemes. This method first sets an initial comparison threshold based on sampled values ​​of the basic parameters (such as calorific value, moisture, and volatile matter) of each coal type in a determined blending scheme. Then, by analyzing feasible and abnormal blending schemes most similar to the current scheme in a historical coal blending database, these schemes are used as boundary conditions to correct the initial comparison threshold, thus obtaining an intermediate comparison threshold. Considering the influence of equipment status on the comparison threshold during actual combustion, this method further compensates for the intermediate comparison threshold based on the actual equipment status during combustion to determine a comparison threshold that comprehensively considers the influence of historical coal blending schemes and equipment status. Finally, by comparing the actual comparison value obtained from the measured values ​​of the basic parameters (such as calorific value, moisture, and volatile matter) during actual combustion with the comparison threshold, the feasibility of the coal blending scheme can be determined. This method simplifies the evaluation process of coal blending schemes, provides strong technical support for coal blending, and helps optimize the entire coal blending process.

[0018] Specifically, the initial comparison threshold T0 is obtained by the following formula:

[0019]

[0020] Where HV represents the weighted average calorific value, VM represents the weighted average volatile matter, AF represents the weighted average ash content, SF represents the weighted average sulfur content, MC represents the weighted average moisture content, and ω1, ω2, ω3, ω4, ω5, ω6, ω7, and ω8 represent weighting coefficients.

[0021] Specifically, the deviation coefficient H is calculated using the following method:

[0022] SA-1 obtains the actual combustion efficiency P corresponding to N1 feasible coal blending schemes. K And by comparison, the highest combustion efficiency P was extracted. H And the actual combustion efficiency P corresponding to N2 abnormal coal blending schemes. Y Ideal combustion efficiency P L Based on the actual combustion efficiency of the i-th abnormal coal blending scheme and ideal combustion efficiency The corresponding first combustion efficiency difference was calculated. Based on the actual combustion efficiency and the highest combustion efficiency P H The corresponding second combustion efficiency difference was calculated.

[0023] Specifically, the first combustion efficiency difference of the i-th abnormal coal blending scheme Obtained through the following formula:

[0024]

[0025] Specifically, the second combustion efficiency difference of the i-th abnormal coal blending scheme Obtained through the following formula:

[0026]

[0027] Wherein, the value of i is {1,2,3,…N2};

[0028] SA-2 obtains the first combustion efficiency difference corresponding to the i-th abnormal coal blending scheme. and the difference in second combustion efficiency The deviation factor ΔP corresponding to the i-th abnormal coal blending scheme is calculated. i ;

[0029] Specifically, the deviation factor ΔP corresponding to the i-th abnormal coal blending schemei Obtained through the following formula:

[0030]

[0031] Where β1 is the first weight, β2 is the second weight, and γ is the coefficient used for normalization.

[0032] SA-3 obtains the deviation factor ΔP corresponding to N2 abnormal coal blending schemes. i , where i takes the value {1,2,3,…N2}, and a deviation factor sequence A is constructed based on it;

[0033] Specifically, the deviation factor sequence A is obtained by the following formula:

[0034]

[0035] Where, α i Indicates the impact factor, and α i ∈[0,1];

[0036] SA-4 obtains the deviation factor sequence A and calculates the deviation coefficient H;

[0037] Specifically, the deviation coefficient H is obtained by the following formula:

[0038]

[0039] Where N1 is the number of feasible coal blending schemes, and N2 is the number of abnormal coal blending schemes.

[0040] Specifically, the initial comparison threshold T0 is corrected using the following method:

[0041] Obtain the ratio κ of the deviation coefficient H and the deviation coefficient threshold H0. H Determine the ratio κ H The interval in which the comparison threshold T is located is determined, which includes a first correction ratio, a second correction ratio, and a third correction ratio. A correction coefficient κ is determined based on the interval, and the correction coefficient κ includes the first correction coefficient, the second correction coefficient, and the third correction coefficient. X Obtained through the following formula:

[0042] T X =κ×T0

[0043] If the first correction ratio ≤ ratio κ H When the value is less than the second correction ratio, the correction coefficient κ is taken as the first correction coefficient, with the intermediate comparison threshold T. X It is the product of the first correction factor and T0;

[0044] If the second correction ratio ≤ ratio κ HWhen the third correction ratio is less than the second correction ratio, the correction coefficient κ is taken as the intermediate comparison threshold T. X It is the product of the second correction factor and T0;

[0045] If the third correction ratio ≤ ratio κ H When the correction coefficient κ is taken as the third correction coefficient, the intermediate comparison threshold T is used. X It is the product of the third correction factor and T0.

[0046] Specifically, the first correction ratio is 1, the second correction ratio is 1.1, and the third correction ratio is 1.3; the first correction coefficient is 0.95, the second correction coefficient is 0.9, and the third correction coefficient is 0.85.

[0047] Specifically, the intermediate comparison threshold T X Compensation shall be provided using the following methods:

[0048] SD-1 checks the actual state values ​​D that satisfy the compensation conditions one by one using the following formula. a The deviation value G is calculated from the standard state value D0. a Calculation:

[0049] G a =(D a -D0)×β3

[0050] Where β3 is the third weight;

[0051] SD-2 Judgment Deviation Value G a Is it less than or equal to the deviation threshold G0?

[0052] Such as deviation value G a If the deviation value is less than or equal to the deviation threshold G0, then the deviation value G that meets this condition is extracted. a The first set of deviation values ​​G1 is formed, wherein the first set of deviation values ​​G1 contains M1 deviation values ​​G a And the first average difference of the first difference set G1 is obtained by calculation.

[0053] Such as deviation value G a If the deviation value is greater than the deviation threshold G0, then extract the deviation value G that meets this condition. a This constitutes a second set of differences, G2, which contains M2 deviation values ​​G. a The second average difference of the second difference set G2 is obtained by calculation.

[0054]

[0055] SD-3 is based on the first average difference and the second average difference The equipment condition coefficient C is obtained by the following formula:

[0056]

[0057] SD-4 determines the interval in which the device state coefficient C falls, which includes a first device state coefficient, a second device state coefficient, and a third device state coefficient. Based on the interval, it determines a compensation coefficient μ, which includes a first compensation coefficient, a second compensation coefficient, and a third compensation coefficient. Then, it compares the threshold T. B Obtained through the following formula:

[0058] T B =μ×T X

[0059] If the equipment state coefficient C ≤ the first equipment state coefficient, then the compensation coefficient μ is taken as the first compensation coefficient, and the first compensation coefficient is compared with the intermediate comparison threshold T. X The product equals the comparison threshold T B ;

[0060] If the first equipment state coefficient < equipment state coefficient C ≤ second equipment state coefficient, then the compensation coefficient μ is taken as the second compensation coefficient, and the second compensation coefficient is compared with the intermediate comparison threshold T. X The product equals the comparison threshold T B ;

[0061] If the equipment condition coefficient C > the second equipment condition coefficient, then the compensation coefficient μ is taken as the third compensation coefficient, and the third compensation coefficient is compared with the intermediate comparison threshold T. X The product equals the comparison threshold T B ;

[0062] Specifically, the first equipment status coefficient is 7, the second equipment status coefficient is 10; the first compensation coefficient is 0.98, the second compensation coefficient is 0.95, and the third compensation coefficient is 0.9.

[0063] Specifically, the actual comparison value T is obtained by the following formula:

[0064]

[0065] Where H represents the weighted average actual calorific value, V represents the weighted average actual volatile matter, A represents the weighted average actual ash content, S represents the weighted average actual sulfur content, M represents the weighted average actual moisture content, and ω1, ω2, ω3, ω4, ω5, ω6, ω7, and ω8 represent weighting coefficients.

[0066] Specifically, a feasible coal blending scheme refers to a coal blending scheme that, after evaluation, meets the system's preset combustion effect and pollutant emission standards; an abnormal coal blending scheme refers to a coal blending scheme that exhibits obvious abnormalities during combustion, such as incomplete combustion or excessive pollutant emissions.

[0067] Specifically, the deviation coefficient threshold H0, the deviation value threshold G0, and the standard state value D0 are determined empirically;

[0068] Specifically, the equipment status includes the actual operating temperature inside the boiler, the internal pressure of the boiler, the air volume (representing the amount of air supplied during combustion), the fuel supply rate, and the flue gas temperature.

[0069] Meanwhile, the present invention also provides an evaluation device for coal blending schemes, including: an initial comparison threshold calculation module, an intermediate comparison threshold calculation module, a comparison threshold calculation module, and a feasibility judgment module.

[0070] Specifically, the initial comparison threshold calculation module is used to obtain the relevant parameter sampling values ​​of the coal blending scheme to be evaluated, and calculate the initial comparison threshold T0 based on the relevant parameter sampling values.

[0071] Specifically, the intermediate comparison threshold calculation module is used to obtain the corresponding feasible coal blending scheme and abnormal coal blending scheme from the historical coal blending scheme record database based on the coal blending scheme and its corresponding initial comparison threshold T0, calculate the deviation coefficient H between the coal blending scheme and the obtained historical coal blending scheme, and determine whether the deviation coefficient H is greater than the deviation coefficient threshold H0: if so, the initial comparison threshold T0 is corrected, and the corrected initial comparison threshold T0 is equal to the intermediate comparison threshold T0. X If not, then the initial comparison threshold T0 is not corrected, and the initial comparison threshold T0 is equal to the intermediate comparison threshold T. X .

[0072] Specifically, the comparison threshold calculation module is used to obtain several actual state values ​​D of the actual combustion equipment in the coal blending scheme. a Determine the actual state value D a Is it greater than its corresponding standard state value D0? If yes, then the intermediate comparison threshold T needs to be adjusted. X Compensation is performed, and the intermediate comparison threshold T after compensation is determined. X Equal to comparison threshold T B If not, then no intermediate comparison threshold T is required. X Compensation is performed, with an intermediate comparison threshold T. X Equal to comparison threshold T B .

[0073] Specifically, the feasibility assessment module is used to obtain the actual values ​​of relevant parameters after the actual combustion of the coal blending scheme, obtain an actual comparison value T based on the actual values ​​of the relevant parameters, and determine whether the actual comparison value T is less than or equal to a comparison threshold T. B If the actual comparison value T is less than or equal to the comparison threshold T B If the actual comparison value T is greater than the comparison threshold T, then the coal blending scheme is deemed feasible; B If the coal blending scheme is deemed infeasible, then the coal blending scheme is determined to be infeasible.

[0074] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0075] Figure 1 This is a structural diagram of an evaluation device for a coal blending and combustion scheme according to the present invention.

[0076] Figure 2 This is a flowchart of an evaluation method for a coal blending and combustion scheme according to the present invention;

[0077] Figure 3 This is a flowchart illustrating the method for calculating the deviation coefficient in an evaluation method for a coal blending scheme according to the present invention.

[0078] Figure 4 This is a flowchart of a modified method in the evaluation method of a coal blending scheme according to the present invention.

[0079] Figure 5 This is a flowchart of the compensation method in the evaluation method of a coal blending and combustion scheme according to the present invention. Detailed Implementation

[0080] The present invention will now be described in detail with reference to the accompanying drawings.

[0081] like Figures 1 to 2 As shown, the present invention provides an evaluation device for coal blending schemes, including: an initial comparison threshold calculation module, an intermediate comparison threshold calculation module, a comparison threshold calculation module, and a feasibility judgment module.

[0082] The initial comparison threshold calculation module is used to execute step S10, obtain the relevant parameter sampling values ​​of the coal blending scheme to be evaluated, and calculate the initial comparison threshold T0 based on the relevant parameter sampling values.

[0083] Specifically, the initial comparison threshold T0 is obtained by the following formula:

[0084]

[0085] Where HV represents the weighted average calorific value, VM represents the weighted average volatile matter, AF represents the weighted average ash content, SF represents the weighted average sulfur content, MC represents the weighted average moisture content, and ω1, ω2, ω3, ω4, ω5, ω6, ω7, and ω8 represent weighting coefficients.

[0086] The intermediate comparison threshold calculation module performs step S20, which, based on the coal blending scheme and its corresponding initial comparison threshold T0, retrieves the corresponding feasible coal blending scheme and abnormal coal blending scheme from the historical coal blending scheme record database, calculates the deviation coefficient H between the coal blending scheme and the retrieved historical coal blending scheme, and determines whether the deviation coefficient H is greater than the deviation coefficient threshold H0.

[0087] If so, the initial comparison threshold T0 is corrected, and the corrected initial comparison threshold T0 is equal to the intermediate comparison threshold T. X ;

[0088] If not, then the initial comparison threshold T0 is not modified, and the initial comparison threshold T0 is equal to the intermediate comparison threshold T. X .

[0089] Specifically, the deviation coefficient H is calculated using the following method:

[0090] SA-1 obtains the actual combustion efficiency P corresponding to N1 feasible coal blending schemes. K And by comparison, the highest combustion efficiency P was extracted. H And the actual combustion efficiency P corresponding to N2 abnormal coal blending schemes. Y Ideal combustion efficiency P L Based on the actual combustion efficiency of the i-th abnormal coal blending scheme and ideal combustion efficiency The corresponding first combustion efficiency difference was calculated. Based on the actual combustion efficiency and the highest combustion efficiency P H The corresponding second combustion efficiency difference was calculated.

[0091] Specifically, the first combustion efficiency difference of the i-th abnormal coal blending scheme Obtained through the following formula:

[0092]

[0093] Specifically, the second combustion efficiency difference of the i-th abnormal coal blending scheme Obtained through the following formula:

[0094]

[0095] Wherein, the value of i is {1,2,3,…N2};

[0096] SA-2 obtains the first combustion efficiency difference corresponding to the i-th abnormal coal blending scheme. and the difference in second combustion efficiency The deviation factor ΔP corresponding to the i-th abnormal coal blending scheme is calculated. i ;

[0097] Specifically, the deviation factor ΔP corresponding to the i-th abnormal coal blending scheme i Obtained through the following formula:

[0098]

[0099] Where β1 is the first weight, β2 is the second weight, and γ is the coefficient used for normalization.

[0100] SA-3 obtains the deviation factor ΔP corresponding to N2 abnormal coal blending schemes. i , where i takes the value {1,2,3,…N2}, and a deviation factor sequence A is constructed based on it;

[0101] Specifically, the deviation factor sequence A is obtained by the following formula:

[0102]

[0103] Where, α i Indicates the impact factor, and α i ∈[0,1];

[0104] SA-4 obtains the deviation factor sequence A and calculates the deviation coefficient H;

[0105] Specifically, the deviation coefficient H is obtained by the following formula:

[0106]

[0107] Where N1 is the number of feasible coal blending schemes, and N2 is the number of abnormal coal blending schemes.

[0108] Specifically, the initial comparison threshold T0 is corrected using the following method:

[0109] Obtain the ratio κ of the deviation coefficient H and the deviation coefficient threshold H0. H Determine the ratio κ H The correction coefficient κ is determined based on the interval in which the interval is located, and then the intermediate comparison threshold T is set. X Obtained through the following formula:

[0110] T X =κ×T0

[0111] If 1 ≤ ratio κH When <1.1, the correction coefficient κ is taken as 0.95, and the intermediate comparison threshold T X It is 0.95T0;

[0112] For example, 1.1 ≤ ratio κ H When <1.3, the correction coefficient κ is taken as 0.9, and the intermediate comparison threshold T X It is 0.9T0;

[0113] For example, 1.3 ≤ ratio κ H When the correction coefficient κ is 0.85, the intermediate comparison threshold T is... X It is 0.85T0.

[0114] The comparison threshold calculation module executes step S30 to obtain several actual state values ​​D of the actual combustion equipment of the coal blending scheme. a Determine the actual state value D a Is it greater than its corresponding standard state value D0?

[0115] If so, then the intermediate comparison threshold T needs to be adjusted. X Compensation is performed, and the intermediate comparison threshold T after compensation is determined. X Equal to comparison threshold T B ;

[0116] If not, then no intermediate comparison threshold T is required. X Compensation is performed, with an intermediate comparison threshold T. X Equal to comparison threshold T B .

[0117] Specifically, the coal blending scheme has several equipment states during actual combustion, one of which includes an actual state value D. a And its corresponding standard state value D0.

[0118] Specifically, the intermediate comparison threshold T X Compensation shall be provided using the following methods:

[0119] SD-1 satisfies the actual state value D a Under the condition that the actual state value D is greater than the corresponding standard state value D0, the following formula is used to calculate the actual state value D one by one. a The deviation value G is calculated from the standard state value D0. a Calculation:

[0120] G a =(D a -D0)×β3

[0121] Where β3 is the third weight;

[0122] SD-2 Judgment Deviation Value G aIs it less than or equal to the deviation threshold G0?

[0123] Such as deviation value G a If the deviation value is less than or equal to the deviation threshold G0, then the deviation value G that meets this condition is extracted. a The first set of deviation values ​​G1 is formed, wherein the first set of deviation values ​​G1 contains M1 deviation values ​​G a And the first average difference of the first difference set G1 is obtained by calculation.

[0124] Such as deviation value G a If the deviation value is greater than the deviation threshold G0, then extract the deviation value G that meets this condition. a This constitutes a second set of differences, G2, which contains M2 deviation values ​​G. a The second average difference of the second difference set G2 is obtained by calculation.

[0125]

[0126] SD-3 is based on the first average difference and the second average difference The equipment condition coefficient C is obtained by the following formula:

[0127]

[0128] SD-4 determines the interval in which the device state coefficient C is located, determines the compensation coefficient μ based on the interval, and then compares the threshold T. B Obtained through the following formula:

[0129] T B =μ×T X

[0130] If the equipment condition coefficient C ≤ 7, then the compensation coefficient μ is taken as 0.98, and the comparison threshold T is used. B 0.98T X ;

[0131] If 7 < equipment condition coefficient C ≤ 10, then the compensation coefficient μ is taken as 0.95, and the comparison threshold T is used. B 0.95T X ;

[0132] If the equipment condition coefficient C > 10, then the compensation coefficient μ is taken as 0.9, and the comparison threshold T is used. B 0.9T X .

[0133] The feasibility assessment module executes step S40, which obtains the actual values ​​of relevant parameters after the actual combustion of the coal blending scheme, and obtains an actual comparison value T based on the actual values ​​of the relevant parameters, and determines whether the actual comparison value T is less than or equal to the comparison threshold T. B :

[0134] If the actual comparison value T is less than or equal to the comparison threshold T B If so, the coal blending scheme is deemed feasible;

[0135] If the actual comparison value T is greater than the comparison threshold T B If the coal blending scheme is deemed infeasible, then the coal blending scheme is determined to be infeasible.

[0136] Specifically, the actual comparison value T is obtained by the following formula:

[0137]

[0138] Where H represents the weighted average actual calorific value, V represents the weighted average actual volatile matter, A represents the weighted average actual ash content, S represents the weighted average actual sulfur content, M represents the weighted average actual moisture content, and ω1, ω2, ω3, ω4, ω5, ω6, ω7, and ω8 represent weighting coefficients.

[0139] Based on the same inventive concept, this application also provides an electronic device, which can be a server, desktop computing device, or mobile computing device (e.g., laptop computing device, handheld computing device, tablet computer, netbook, etc.). The device includes one or more processors and a memory, wherein the processor is used to execute a program to implement an evaluation method for coal blending and combustion schemes; and the memory is used to store computer programs executable by the processor.

[0140] Based on the same inventive concept, this application also provides a computer-readable storage medium corresponding to the aforementioned embodiments of the evaluation method for coal blending schemes. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of the evaluation method described in any of the above embodiments.

[0141] This application may take the form of a computer program product implemented on one or more storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing program code. Computer storage media include permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information may be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to: phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0142] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and the present invention also intends to include these modifications and variations.

Claims

1. An evaluation method of a coal blending scheme, characterized in that: S10 obtains the sampling values of the related parameters of the coal blending scheme to be evaluated, and calculates an initial comparison threshold T0 according to the sampling values of the related parameters; S20 obtains the corresponding feasible coal blending scheme and abnormal coal blending scheme from a historical coal blending scheme record library according to the coal blending scheme and the corresponding initial comparison threshold T0, calculates a deviation coefficient H of the coal blending scheme and the obtained historical coal blending scheme, and judges whether the deviation coefficient H is greater than a deviation coefficient threshold H0: If yes, the initial comparison threshold To is modified, the modified initial comparison threshold To being equal to the intermediate comparison threshold T X ; If not, the initial comparison threshold T0 is not modified and the initial comparison threshold T0 is equal to the intermediate comparison threshold T X ; S30 obtaining several actual state values of the actual combustion equipment of the coal blending scheme , judging whether the actual state values are greater than their corresponding standard state values : If yes, the intermediate comparison threshold T X needs to be compensated, the compensated intermediate comparison threshold T X equals the comparison threshold T B ; If not, no compensation of the intermediate comparison threshold T X is performed, and the intermediate comparison threshold T X is equal to the comparison threshold T B ; S40 obtaining the actual values of the related parameters after the actual combustion of the coal blending scheme, obtaining an actual comparison value T according to the actual values of the related parameters, and judging whether the actual comparison value T is less than or equal to a comparison threshold T B : If the actual comparison value T is less than or equal to the comparison threshold T B , it is determined that the coal blending scheme is feasible; If the actual comparison value T is greater than the comparison threshold T B then it is determined that the coal blending scheme is not feasible.

2. The method for evaluating the coal blending and firing scheme according to claim 1, characterized in that: The initial comparison threshold T0 is obtained by the following formula: wherein HV represents a weighted average sampling calorific value, VM represents a weighted average sampling volatile matter, AF represents a weighted average sampling ash, SF represents a weighted average sampling sulfur, and MC represents a weighted average sampling moisture, , , , , , , , denote weight coefficients.

3. The method for evaluating the coal blending and firing scheme according to claim 2, characterized in that: The calculation of the deviation coefficient H is performed by the following method: SA-1 Obtain the actual combustion efficiency corresponding to N1 feasible coal blending schemes And by comparison, the highest combustion efficiency was extracted. And the actual combustion efficiency corresponding to N2 abnormal coal blending schemes. Ideal combustion efficiency Based on the actual combustion efficiency of the i-th abnormal coal blending scheme and ideal combustion efficiency The corresponding first combustion efficiency difference was calculated. According to the actual combustion efficiency and the highest combustion efficiency The corresponding second combustion efficiency difference was calculated. ; In particular, the first combustion efficiency difference of the ith abnormal coal blending scheme is obtained by the following formula: In particular, the second combustion efficiency difference of the ith abnormal coal blending scheme is obtained by the following formula: Wherein, the value of i is {1, 2, 3, … N2}; SA-2 obtains the first combustion efficiency difference corresponding to the i-th abnormal coal blending scheme , and the second combustion efficiency difference , and calculates the deviation factor corresponding to the i-th abnormal coal blending scheme ; In particular, the deviation factor corresponding to the i-th abnormal coal blending scheme is obtained by the following formula: wherein, is a first weight, is a second weight, and γ is a coefficient for normalization; SA-3 obtains the deviation factors corresponding to N2 abnormal coal blending schemes wherein i is {1, 2, 3, …, N2}, and a deviation factor sequence A is constructed according to i. Specifically, the deviation factor sequence A is obtained by the following formula: wherein, represents an impact factor, and [0, 1]; SA-4 obtains the deviation factor sequence A and calculates the deviation coefficient H; Specifically, the deviation coefficient H is obtained by the following formula: wherein, is the number of feasible coal blending schemes, is the number of abnormal coal blending schemes.

4. The method for evaluating a coal blending and firing scheme according to claim 3, characterized in that: The initial comparison threshold T0 is corrected by the following method: obtaining a ratio of the deviation coefficient H and a deviation coefficient threshold H0 , judging the ratio into which interval the ratio is located, the interval including a first correction ratio, a second correction ratio and a third correction ratio, and determining a correction coefficient according to the interval into which the ratio is located , the correction coefficient including a first correction coefficient, a second correction coefficient and a third correction coefficient, then the intermediate comparison threshold T X is obtained by the following formula: If the first modified ratio ≤ the ratio If the second modified ratio, then the modification coefficient Take the first modified coefficient, the product of the first modified coefficient and the initial comparison threshold To is equal to the intermediate comparison threshold T X ; If the second modified ratio ≤ the ratio If the third modified ratio, then the modified coefficient Take the second modified coefficient, the product of the second modified coefficient and the initial comparison threshold To is equal to the intermediate comparison threshold T X ; If the third correction ratio ≤ the ratio then the correction factor is taken as the third correction factor, the product of the third correction factor and the initial comparison threshold value To being equal to the intermediate comparison threshold value T X .

5. The method for evaluating the coal blending and firing scheme according to claim 4, characterized in that: Intermediate comparison threshold T X The compensation is performed by the following method: SD-1 calculates the deviation value one by one for the actual state values satisfying the compensation condition by the following formula and the standard state value of the standard state value​ wherein is a third weight; SD-2 determines the deviation value whether or not less than or equal to the deviation value threshold : If the deviation value is less than or equal to the deviation value threshold If the deviation value is less than or equal to the deviation value threshold If the deviation value is less than or equal to the deviation value threshold If the deviation value is less than or equal to the deviation value threshold If the deviation value is less than or equal to the deviation value threshold If the deviation value is less than or equal to the deviation value threshold If the deviation value is less than or equal to the deviation value threshold If the deviation value is less than or equal to the deviation value threshold If the deviation value is less than or equal to the deviation value threshold If the deviation value is greater than the threshold value If the deviation value is greater than the threshold value then extract the deviation value satisfying the condition constitute a second difference value set wherein the second difference value set contains M2 deviation values and the second average difference value of the second difference value set is obtained by calculation ; SD-3 is based on the first average difference and the second average difference The equipment status coefficient C is obtained by the following formula: SD-4 determines in which interval of device state coefficients C, which include a first device state coefficient, a second device state coefficient and a third device state coefficient, the device state coefficient C is located, and determines a compensation coefficient according to the interval in which the device state coefficient C is located , which includes a first compensation coefficient, a second compensation coefficient and a third compensation coefficient , and compares the threshold value T B is obtained by the following formula: If the device state coefficient C is less than or equal to the first device state coefficient, then the compensation coefficient is The first compensation coefficient is taken, which is the product of the intermediate comparison threshold T X and the first compensation coefficient B ; If the first device state coefficient < device state coefficient C < second device state coefficient, then the compensation coefficient is taken as the second compensation coefficient, which is equal to the product of the intermediate comparison threshold T X and the comparison threshold T B ; If the device state coefficient C is greater than the second device state coefficient, then the compensation coefficient is The third compensation coefficient is taken, which is equal to the product of the intermediate comparison threshold T X and the comparison threshold T B .

6. The method for evaluating the coal blending and firing scheme according to claim 5, characterized in that: The actual comparison value T is obtained by the following formula: where H represents a weighted average actual calorific value, V represents a weighted average actual volatile matter, A represents a weighted average actual ash content, S represents a weighted average actual sulfur content, and M represents a weighted average actual moisture content, 、 、 、 、 、 、 、 denote weight coefficients.

7. The method for evaluating the coal blending and firing scheme according to claim 6, characterized in that: The first correction ratio is 1, the second correction ratio is 1.1, and the third correction ratio is 1.3; The first correction coefficient is 0.95, the second correction coefficient is 0.9, and the third correction coefficient is 0.

85.

8. The method for evaluating the coal blending and firing scheme according to claim 7, characterized in that: The first equipment state coefficient is 7, and the second equipment state coefficient is 10; The first compensation coefficient is 0.98, the second compensation coefficient is 0.95, and the third compensation coefficient is 0.

9.

9. An evaluation device for coal blending and combustion schemes, characterized in that, It comprises: An initial comparison threshold calculation module, an intermediate comparison threshold calculation module, a comparison threshold calculation module, and a feasibility judgment module; The initial comparison threshold calculation module is used to obtain the sampling values of the related parameters of the coal blending scheme to be evaluated, and calculate an initial comparison threshold T0 according to the sampling values of the related parameters; The intermediate comparison threshold value calculation module is configured to obtain corresponding feasible coal blending schemes and abnormal coal blending schemes from the historical coal blending scheme record library according to the coal blending scheme and the initial comparison threshold value T0 corresponding to the coal blending scheme, calculate a deviation coefficient H of the coal blending scheme and the obtained historical coal blending scheme, and determine whether the deviation coefficient H is greater than a deviation coefficient threshold value H0: if yes, the initial comparison threshold value T0 is modified, and the modified initial comparison threshold value T0 is equal to the intermediate comparison threshold value T X ; if no, the initial comparison threshold value T0 is not modified, and the initial comparison threshold value T0 is equal to the intermediate comparison threshold value T X . The comparison threshold calculation module is configured to acquire a plurality of actual state values of the actual combustion equipment of the coal blending scheme , judge whether the actual state value is greater than the corresponding standard state value : if yes, the intermediate comparison threshold T X needs to be compensated, and the compensated intermediate comparison threshold T X is equal to the comparison threshold T B ; if no, the intermediate comparison threshold T X does not need to be compensated, and the intermediate comparison threshold T X is equal to the comparison threshold T B . The feasibility judging module is configured to acquire actual values of related parameters after actual combustion of the coal blending scheme, obtain an actual comparison value T according to the actual values of the related parameters, and judge whether the actual comparison value T is less than or equal to a comparison threshold T B If the actual comparison value T is less than or equal to the comparison threshold T B , it is determined that the coal blending scheme is feasible. If the actual comparison value T is greater than the comparison threshold T B then it is determined that the coal blending scheme is not viable.

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