Method for optimizing coal blending structure of top-loading coke oven

Abstract

The invention relates to a top-loading coke oven coal blending structure optimization method, and relates to the technical field of coke oven coal blending, and the method comprises the following steps: S1, making coal blending schemes including a low volatilization scheme, a high volatilization scheme and a reference scheme; s2, calculating a mixed coal price Pi, a mixed volatile component Vi and a mixed ash content Ai of each coal blending scheme; s3, calculating the theoretical coal consumption # imgabs0 # of each coal blending scheme; S4, calculating the dry basis coal consumption # imgabs1 # of each coal blending scheme; S5, calculating the mixed coal blending cost Li of each coal blending scheme; the method comprises the following steps: S1, calculating a coke yield cost difference # imgabs2 # of each coal blending scheme, S2, calculating a byproduct total cost difference # imgabs3 # of each coal blending scheme, S8, calculating a final coal blending cost # imgabs4 # of each coal blending scheme, and S9, comparing the final coal blending costs of the coal blending schemes, and selecting the coal blending scheme with the lowest final coal blending cost as an optimal coal blending structure. The method has the effects that the coal blending cost is convenient to control, and the production benefit stability of a coking plant is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coke oven coal blending, and in particular to a method for optimizing the coal blending structure of a top-loading coke oven. Background Art

[0002] In the current coking industry, the key strategies for reducing production costs are mainly concentrated in two core aspects: first, reducing dependence on expensive high-viscosity coal such as prime coking coal and fat coal, because the use of these coals will significantly increase production costs; second, introducing new varieties of coking coal with lower costs to replace part of traditional high-cost coal, thereby achieving cost reduction.

[0003] At present, each coking enterprise has long been using a specific coal blending scheme based on its own production habits and experience. However, due to the large fluctuations in the current coal price market, if coking enterprises continue to use a specific coal blending scheme, then in the case of market price fluctuations, the enterprise will find it difficult to control the coal blending cost, which is not conducive to ensuring the production efficiency of the coking plant. Summary of the invention

[0004] In order to facilitate the control of coal blending costs and improve the stability of the production efficiency of a coking plant, the present application provides a method for optimizing the coal blending structure of a top-loading coke oven.

[0005] The present application provides a method for optimizing the top-loading coke oven coal distribution structure, which adopts the following technical solution: comprising the following steps:

[0006] Step S1, formulating a coal blending scheme, which includes a low volatility scheme, a high volatility scheme and a benchmark scheme;

[0007] Step S2: Calculate the mixed coal price P of each coal blending scheme i 、Mixed volatile matter V i and mixed ash A i ;

[0008] Step S3: Calculate the theoretical coal consumption of each coal blending scheme

[0009] Step S4: Calculate the dry basis coal consumption of each coal blending scheme

[0010] Step S5: Calculate the mixed coal blending cost L of each coal blending scheme i ;

[0011] Step S6: Calculate the coke production cost difference of each coal blending scheme

[0012] Step S7: Calculate the total cost difference of by-products of each coal blending scheme

[0013] Step S8: Calculate the final coal blending cost of each coal blending scheme

[0014] Step S9: compare the final coal blending costs of the coal blending schemes, and select the coal blending scheme with the lowest final coal blending cost as the optimal coal blending structure.

[0015] Preferably, step S1 comprises the following steps:

[0016] Step S11: Input the unit price of coking coal P 主 、Volatile matter of coking coal 主 And main coking coal ash A 主 ; Enter the unit price of fat coal P 肥 、Fat coal volatile matter V 肥 Hefei coal ash content A 肥 ; Input gas coal unit price P 气 、Volatile matter of gas coal 气 Heqi coal ash content A 气 ; Enter lean coal unit price P 瘦 、Lean coal volatile matter V 瘦 and lean coal ash content A 瘦 ; Enter 1 / 3 coking coal unit price P 焦 、1 / 3 coking coal volatile matter V 焦 and 1 / 3 of coking coal ash A 焦 ;

[0017] Step S12: Low volatility solution includes a ratio of X 1主 The main coking coal, the proportion is X 1肥 The fat coal, the proportion is X 1气 Gas coal, with a ratio of X 1瘦 Lean coal and proportion X 1焦 1 / 3 of coking coal; high volatility solutions include a ratio of X 2主 The main coking coal, the proportion is X 2肥 The fat coal, the proportion is X 2气 Gas coal, with a ratio of X 2瘦 Lean coal and proportion X 2焦 1 / 3 of coking coal; the benchmark solution includes a ratio of X 3主 The main coking coal, the proportion is X 3肥 The fat coal, the proportion is X 3气 Gas coal, with a ratio of X 3瘦 Lean coal and proportion X 3焦 1 / 3 of coking coal;

[0018] Step S13: If the low volatility solution, the high volatility solution and the benchmark solution all meet the established conditions, proceed to step S2; if the low volatility solution, the high volatility solution and the benchmark solution do not meet the established conditions, proceed to step S12.

[0019] Preferably, the conditions set in step S13 include: 25%≤X 1主 ≤35%; 15%≤X 1肥 ≤25%;0≤X 1气 ≤5%; 25%≤X 1瘦 ≤35%; 10%≤X 1焦 ≤20%;25%≤X 2主 ≤35%; 15%≤X 2肥 ≤25%;0≤X 2气 ≤5%;15%≤X 2瘦 ≤25%; 20%≤X 2焦 ≤30%; 25%≤X 3主 ≤35%; 15%≤X 3肥 ≤25%;0≤X 3气 ≤5%; 20%≤X 3瘦 ≤30%; 15%≤X 3焦 ≤25%;X 1瘦 ≠X 2瘦 ≠X 3瘦 or X 1焦 ≠X 2焦 ≠X 3焦 ;X 1主 +X 1肥 +X 1气 +X 1瘦 +X 1焦 =100%;X 2主 +X 2肥 +X 2气 +X 2瘦 +X 2焦 =100%;X 3主 +X 3肥 +X 3气 +X 3瘦 +X 3焦 =100%.

[0020] Preferably, step S2 comprises the following steps:

[0021] S21, mixed coal price is

[0022] Mixed volatiles

[0023] Mixed ash is

[0024] S22. Calculate the low volatile mixed coal price P1, low volatile mixed volatile matter V1 and low volatile mixed ash A1 of the low volatile coal blending scheme; calculate the high volatile mixed coal price P2, high volatile mixed volatile matter V2 and high volatile mixed ash A2 of the high volatile coal blending scheme; calculate the benchmark mixed coal price P3, benchmark mixed volatile matter V3 and benchmark mixed ash A3 of the benchmark coal blending scheme.

[0025] Preferably, the step S3 comprises the following steps:

[0026] Step S31, input the first empirical formula coefficient C1, C1 = 98; input the second empirical formula coefficient C2,

[0027] Step S32, theoretical coal consumption formula is:

[0028] Step S33: Calculate the low volatility theoretical coal consumption of the low volatility coal blending scheme The high volatility theoretical coal consumption of high volatility coal blending scheme is calculated Calculate the benchmark theoretical coal consumption of the benchmark coal blending scheme

[0029] Preferably, step S4 comprises the following steps:

[0030] Step S41: Enter the CDQ loss C 干 ;

[0031] Step S42, dry basis coal consumption formula is:

[0032] Step S43: Calculate the low volatile dry basis coal consumption of the low volatile coal blending scheme The high volatile dry basis coal consumption of the high volatile coal blending scheme is calculated Calculate the benchmark dry coal consumption of the benchmark coal blending scheme

[0033] Preferably, step S5 comprises the following steps:

[0034] Step S51: The cost formula of mixed coal blending is:

[0035] Step S52, calculate the low-volatile mixed coal blending cost L1 of the low-volatile coal blending scheme; calculate the high-volatile mixed coal blending cost L2 of the high-volatile coal blending scheme; calculate the benchmark mixed coal blending cost L3 of the benchmark coal blending scheme.

[0036] Preferably, step S6 comprises the following steps:

[0037] Step S61, enter the processing cost of the coking plant as C加 and coke benefit C 效 ;

[0038] S62, Coke production cost difference formula

[0039] Step S63: Calculate the low volatility coke production cost difference of the low volatility coal blending scheme The difference in production cost of high volatile coke for high volatile coal blending scheme is calculated. Calculate the benchmark coke production cost difference of the benchmark coal blending solution

[0040] Preferably, step S7 comprises the following steps:

[0041] S71, calculate the low volatile difference ΔV1, ΔV1 = V1-V3; calculate the high volatile difference ΔV2, ΔV2 = V2-V3; calculate the base volatile difference ΔV3, ΔV3 = V3-V3 = 0; enter the crude benzene yield change C when the volatile content changes by 1% 苯 , when the volatile matter changes by 1%, the change in tar yield C 焦 、Change in ammonium sulfate yield when the volatile matter changes by 1% C 铵 The change in gas yield when the volatile matter changes by 1% C 气 ; Enter crude benzene unit price P 苯 , Tar unit price P 焦 、Ammonium sulfate unit price P 铵 and gas unit price P 气 ;

[0042] S72, the total cost difference of by-products is

[0043] S73. Calculate the total cost difference of low volatile by-products of low volatile coal blending scheme The total cost difference of high volatile by-products of high volatile coal blending scheme is calculated. Calculate the baseline by-product total cost difference for the baseline coal blending solution

[0044] Preferably, step S8 comprises the following steps:

[0045] S81. The final coal blending cost calculation formula is:

[0046] S82. Calculate the final low volatility coal blending cost of the low volatility coal blending solution Calculate the final high volatile coal blending cost of the high volatile coal blending scheme Calculate the benchmark final coal blending cost of the benchmark coal blending solution

[0047] In summary, the present application includes at least one of the following beneficial technical effects:

[0048] 1. Preset three coal blending structures, namely, low volatility scheme, high volatility scheme and benchmark scheme, calculate the final coal blending costs of the three coal blending structures, select the coal blending structure with lower cost according to the final coal blending cost, and then adjust the coal blending structure, so as to control the coal blending cost and improve the stability of the production efficiency of the coking plant under the condition of market price fluctuations;

[0049] 2. According to the different proportions of the three coal blending schemes, the mixed coal blending cost, coke output cost difference and by-product total cost difference of the three coal blending schemes are calculated, and the mixed coal blending cost, coke output cost difference and by-product total cost difference are used to reflect the final coal blending cost of the coal blending structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a flow chart of a method for optimizing the coal distribution structure of a top-loading coke oven in an embodiment of the present application.

[0051] Figure 2 It is a flow chart showing the formulation of a coal blending plan in an embodiment of the present application. DETAILED DESCRIPTION

[0052] The following is combined with Figure 1-2 This application is described in further detail.

[0053] Example 1 of the present application discloses a method for optimizing the coal distribution structure of a top-loading coke oven. Figure 1 and Figure 2 , including the following steps:

[0054] Step S1, formulate a coal blending plan, the coal blending plan includes a low volatility plan, a high volatility plan and a benchmark plan, and includes the following steps.

[0055] Step S11: Input the unit price of coking coal P 主 、Volatile matter of coking coal 主 And main coking coal ash A 主 ; Enter the unit price of fat coal P 肥 、Fat coal volatile matter V 肥 Hefei coal ash content A 肥 ; Input gas coal unit price P 气 、Volatile matter of gas coal 气 Heqi coal ash content A 气 ; Enter lean coal unit price P 瘦 、Lean coal volatile matter V 瘦 and lean coal ash content A 瘦 ; Enter 1 / 3 coking coal unit price P 焦 、1 / 3 coking coal volatile matter V 焦 and 1 / 3 of coking coal ash A焦 .

[0056] Step S12: Low volatility solution includes a ratio of X 1主 The main coking coal, the proportion is X 1肥 The fat coal, the proportion is X 1气 Gas coal, with a ratio of X 1瘦 Lean coal and proportion X 1焦 1 / 3 of coking coal; high volatility solutions include a ratio of X 2主 The main coking coal, the proportion is X 2肥 The fat coal, the proportion is X 2气 Gas coal, with a ratio of X 2瘦 Lean coal and proportion X 2焦 1 / 3 of coking coal; the benchmark solution includes a ratio of X 3主 The main coking coal, the proportion is X 3肥 The fat coal, the proportion is X 3气 Gas coal, with a ratio of X 3瘦 Lean coal and proportion X 3焦 1 / 3 of coking coal.

[0057] Step S13: setting conditions including: 25% ≤ X 1主 ≤35%; 15%≤X 1肥 ≤25%;0≤X 1气 ≤5%; 25%≤X 1瘦 ≤35%; 10%≤X 1焦 ≤20%;25%≤X 2主 ≤35%; 15%≤X 2肥 ≤25%;0≤X 2气 ≤5%;15%≤X 2瘦 ≤25%; 20%≤X 2焦 ≤30%; 25%≤X 3主 ≤35%; 15%≤X 3肥 ≤25%;0≤X 3气 ≤5%; 20%≤X 3瘦 ≤30%; 15%≤X 3焦 ≤25%;X 1瘦 ≠X 2瘦 ≠X 3瘦 or X 1焦 ≠X 2焦 ≠X 3焦 ;X 1主 +X 1肥 +X 1气 +X 1瘦 +X 1焦 =100%;X 2主 +X 2肥 +X 2气 +X 2瘦 +X2焦 =100%;X 3主 +X 3肥 +X 3气 +X 3瘦 +X 3焦 =100%. If the low volatility solution, the high volatility solution and the benchmark solution all meet the formulation conditions, then proceed to step S2; if the low volatility solution, the high volatility solution and the benchmark solution do not meet the formulation conditions, then proceed to step S12 to formulate a new solution.

[0058] Step S2: Calculate the mixed coal price P of each coal blending scheme i 、Mixed volatile matter V i and mixed ash A i , including the following steps.

[0059] S21, mixed coal price is

[0060] Mixed volatiles

[0061] Mixed ash is

[0062] S22, calculate the low volatility mixed coal price P1 of the low volatility coal blending scheme, where:

[0063]

[0064] The low volatile mixed volatile matter V1 of the low volatile coal blending scheme is calculated, where:

[0065]

[0066] The low volatile mixed ash A1 of the low volatile coal blending scheme is calculated, where:

[0067]

[0068] The high volatile mixed coal price P2 of the high volatile coal blending scheme is calculated, where:

[0069]

[0070] The high volatile mixed volatile matter V2 of the high volatile coal blending scheme is calculated, where:

[0071]

[0072] The high volatile mixed ash A2 of the high volatile coal blending scheme is calculated, where:

[0073]

[0074] The benchmark mixed coal price P3 of the benchmark coal blending scheme is calculated, where:

[0075]

[0076] The benchmark mixed volatile matter V3 of the benchmark coal blending scheme is calculated, where:

[0077]

[0078] The benchmark mixed ash content A3 of the benchmark coal blending scheme is calculated, where:

[0079]

[0080] Step S3: Calculate the theoretical coal consumption of each coal blending scheme The following steps are included.

[0081] Step S31, input the first empirical formula coefficient C1, C1 = 98; input the second empirical formula coefficient C2,

[0082]

[0083] Step S32, theoretical coal consumption formula is: Step S33: Calculate the low volatility theoretical coal consumption of the low volatility coal blending scheme in,

[0084]

[0085] The high volatility theoretical coal consumption of high volatility coal blending scheme is calculated in,

[0086]

[0087] Calculate the benchmark theoretical coal consumption of the benchmark coal blending scheme in, Step S4: Calculate the dry basis coal consumption of each coal blending scheme The following steps are included.

[0088] Step S41: Enter the CDQ loss C 干 .

[0089] Step S42, dry basis coal consumption formula is: Step S43: Calculate the low volatile dry basis coal consumption of the low volatile coal blending scheme in, The high volatile dry basis coal consumption of the high volatile coal blending scheme is calculated in, Calculate the benchmark dry coal consumption of the benchmark coal blending scheme in, Step S5: Calculate the mixed coal blending cost L of each coal blending scheme i , including the following steps.

[0090] Step S51: The cost formula of mixed coal blending is: Step S52: Calculate the low volatility mixed coal blending cost L1 of the low volatility coal blending solution, where:

[0091]

[0092] The high volatile mixed coal blending cost L2 of the high volatile coal blending scheme is calculated, where:

[0093] The benchmark mixed coal blending cost L3 of the benchmark coal blending scheme is calculated, where:

[0094] Step S6: Calculate the coke production cost difference of each coal blending scheme The following steps are included.

[0095] Step S61, enter the processing cost of the coking plant as C 加 and coke benefit C 效 .

[0096] S62. The formula for the difference in coke production cost is:

[0097] Step S63: Calculate the low volatility coke production cost difference of the low volatility coal blending scheme in,

[0098]

[0099] The difference in production cost of high volatile coke for high volatile coal blending scheme is calculated. in,

[0100]

[0101] Calculate the benchmark coke production cost difference of the benchmark coal blending solution

[0102] Step S7: Calculate the total cost difference of by-products of each coal blending scheme The following steps are included.

[0103] S71, calculate the low volatile difference ΔV1, ΔV1 = V1-V3; calculate the high volatile difference ΔV2, ΔV2 = V2-V3; calculate the base volatile difference ΔV3, ΔV3 = V3-V3 = 0; enter the crude benzene yield change C when the volatile content changes by 1% 苯 , when the volatile matter changes by 1%, the change in tar yield C 焦、Change in ammonium sulfate yield when the volatile matter changes by 1% C 铵 The change in gas yield when the volatile matter changes by 1% C 气 ; Enter crude benzene unit price P 苯 , Tar unit price P 焦 、Ammonium sulfate unit price P 铵 and gas unit price P 气 .

[0104] S72, the total cost difference of by-products is

[0105] S73. Calculate the total cost difference of low volatile by-products of low volatile coal blending scheme in,

[0106]

[0107] The total cost difference of high volatile by-products of high volatile coal blending scheme is calculated. in,

[0108] Calculate the baseline by-product total cost difference for the baseline coal blending solution

[0109] Step S8: Calculate the final coal blending cost of each coal blending scheme The following steps are included.

[0110] S81. The final coal blending cost calculation formula is:

[0111] S82. Calculate the final low volatility coal blending cost of the low volatility coal blending solution in,

[0112] Calculate the final high volatile coal blending cost of the high volatile coal blending scheme in,

[0113] Calculate the benchmark final coal blending cost of the benchmark coal blending solution in,

[0114] Step S9: compare the final coal blending costs of the coal blending schemes, and select the coal blending scheme with the lowest final coal blending cost as the optimal coal blending structure.

[0115] The implementation principle of the method for optimizing the coal blending structure of a top-loading coke oven in Example 1 of the present application is as follows: three coal blending structures, namely, a low volatility scheme, a high volatility scheme and a benchmark scheme, are formulated, and the mixed coal blending cost, the coke output cost difference and the by-product total cost difference of the three coal blending schemes are calculated according to the different proportions of the three coal blending schemes. The mixed coal blending cost, the coke output cost difference and the by-product total cost difference are used to reflect the final coal blending cost of the coal blending structure, and a coal blending structure with a lower cost is selected according to the final coal blending cost obtained, and then the coal blending structure is adjusted, so that the coal blending cost can be easily controlled in the case of market price fluctuations, thereby improving the stability of the production efficiency of the coking plant.

[0116] Example 2 of the present application discloses a method for optimizing the coal distribution structure of a top-loading coke oven. Figure 1 and Figure 2 , including the following steps:

[0117] Step S1, formulate a coal blending plan, the coal blending plan includes a low volatility plan, a high volatility plan and a benchmark plan, and includes the following steps.

[0118] Step S11: Input the unit price of coking coal P 主 1900, volatile matter V of main coking coal 主 The ash content of main coking coal is 21.61% and A 主 is 10.45%; enter the unit price of fat coal P 肥 1950, fat coal volatile matter V 肥 A is 32.54% and fat coal ash 肥 is 9.38%; enter the gas coal unit price P 气 1500, gas coal volatile matter V 气 37.86% and gas coal ash content A 气 is 8.00%; enter the lean coal unit price P 瘦 1800, lean coal volatile matter V 瘦 18.05% and lean coal ash content A 瘦 is 10.28%; enter 1 / 3 of the coking coal unit price P 焦 1700, 1 / 3 of the volatile matter of coking coal V 焦 36.45% and 1 / 3 of coking coal ash A 焦 It is 8.94%.

[0119] Step S12: Low volatility solution includes a ratio of X 1主 The main coking coal, the proportion is X 1肥 The fat coal, the proportion is X 1气 Gas coal, with a ratio of X 1瘦 Lean coal and proportion X 1焦 1 / 3 of coking coal, of which

[0120] The high volatility solution includes a ratio of X 2主 The main coking coal, the proportion is X 2肥 The fat coal, the proportion is X 2气 Gas coal, with a ratio of X 2瘦 Lean coal and proportion X 2焦 1 / 3 of coking coal, of which

[0121] The benchmark solution includes a ratio of X 3主 The main coking coal, the proportion is X 3肥 The fat coal, the proportion is X 3气 Gas coal, with a ratio of X 3瘦 Lean coal and proportion X 3焦 1 / 3 of coking coal, of which

[0122] Step S13: setting conditions including: 25% ≤ X 1主 ≤35%; 15%≤X 1肥 ≤25%;0≤X 1气 ≤5%; 25%≤X 1瘦 ≤35%; 10%≤X 1焦 ≤20%;25%≤X 2主 ≤35%; 15%≤X 2肥 ≤25%;0≤X 2气 ≤5%;15%≤X 2瘦 ≤25%; 20%≤X 2焦 ≤30%; 25%≤X 3主 ≤35%; 15%≤X 3肥 ≤25%;0≤X 3气 ≤5%; 20%≤X 3瘦 ≤30%; 15%≤X 3焦 ≤25%;X 1瘦 ≠X 2瘦 ≠X 3瘦 or X 1焦 ≠X 2焦 ≠X 3焦 ;X 1主 +X 1肥 +X 1气 +X 1瘦 +X 1焦 =100%;X 2主 +X 2肥 +X 2气 +X 2瘦 +X 2焦 =100%;X 3主 +X 3肥 +X 3气 +X 3瘦 +X3焦 =100%. If the low volatility solution, the high volatility solution and the benchmark solution all meet the formulation conditions, then proceed to step S2; if the low volatility solution, the high volatility solution and the benchmark solution do not meet the formulation conditions, then proceed to step S12 to formulate a new solution.

[0123] Step S2: Calculate the mixed coal price P of each coal blending scheme i 、Mixed volatile matter V i and mixed ash A i , including the following steps.

[0124] S21, mixed coal price is Mixed volatiles

[0125] Mixed ash is

[0126] S22, calculate the low volatility mixed coal price P1 of the low volatility coal blending scheme, where:

[0127] The low volatile mixed volatile matter V1 of the low volatile coal blending scheme is calculated, where:

[0128] The low volatile mixed ash A1 of the low volatile coal blending scheme is calculated, where:

[0129] The high volatile mixed coal price P2 of the high volatile coal blending scheme is calculated, where:

[0130] The high volatile mixed volatile matter V2 of the high volatile coal blending scheme is calculated, where:

[0131] The high volatile mixed ash A2 of the high volatile coal blending scheme is calculated, where:

[0132] The benchmark mixed coal price P3 of the benchmark coal blending scheme is calculated, where:

[0133] The benchmark mixed volatile matter V3 of the benchmark coal blending scheme is calculated, where:

[0134]

[0135] The benchmark mixed ash content A3 of the benchmark coal blending scheme is calculated, where:

[0136]

[0137] Step S3: Calculate the theoretical coal consumption of each coal blending scheme The following steps are included.

[0138] Step S31, input the first empirical formula coefficient C1, C1 = 98; input the second empirical formula coefficient C2,

[0139]

[0140] Step S32, theoretical coal consumption formula is: Step S33: Calculate the low volatility theoretical coal consumption of the low volatility coal blending scheme in,

[0141]

[0142] The high volatility theoretical coal consumption of high volatility coal blending scheme is calculated in,

[0143]

[0144] Calculate the benchmark theoretical coal consumption of the benchmark coal blending scheme in,

[0145]

[0146] Step S4: Calculate the dry basis coal consumption of each coal blending scheme The following steps are included.

[0147] Step S41: Enter the CDQ loss C 干 is 2%.

[0148] Step S42, dry basis coal consumption formula is: Step S43: Calculate the low volatile dry basis coal consumption of the low volatile coal blending scheme in,

[0149]

[0150] The high volatile dry basis coal consumption of the high volatile coal blending scheme is calculated in, Calculate the benchmark dry coal consumption of the benchmark coal blending scheme in, Step S5: Calculate the mixed coal blending cost L of each coal blending scheme i , including the following steps.

[0151] Step S51: The cost formula of mixed coal blending is: Step S52: Calculate the low volatility mixed coal blending cost L1 of the low volatility coal blending solution, where:

[0152]

[0153] The high volatile mixed coal blending cost L2 of the high volatile coal blending scheme is calculated, where:

[0154]

[0155] The benchmark mixed coal blending cost L3 of the benchmark coal blending scheme is calculated, where: Step S6: Calculate the coke production cost difference of each coal blending scheme The following steps are included.

[0156] Step S61: Enter the processing cost C of the coking plant 加 , C 加 =200; enter coke benefit C 效 , C 效 =200. S62. The formula for the difference in coke production cost is: Step S63: Calculate the low volatility coke production cost difference of the low volatility coal blending scheme in,

[0157]

[0158] The difference in production cost of high volatile coke for high volatile coal blending scheme is calculated. in,

[0159]

[0160] Calculate the benchmark coke production cost difference of the benchmark coal blending solution Step S7: Calculate the total cost difference of by-products of each coal blending scheme The following steps are included.

[0161] S71, calculate the low volatile difference ΔV1, ΔV1 = V1-V3 = -1.07%; calculate the high volatile difference ΔV2, ΔV2 = V2-V3 = 0.92%; calculate the base volatile difference ΔV3, ΔV3 = V3-V3 = 0; enter the change in crude benzene yield C when the volatile content changes by 1% 苯 The change in tar yield when the volatile matter changes by 1% is C 焦 The change in ammonium sulfate yield when the volatile matter changes by 1% is C 铵 The change in gas yield when the volatile matter changes by 1% is C 气 is 10kg; enter the crude benzene unit price P 苯 5500, tar unit price P 焦 3000, ammonium sulfate unit price P 铵 700 and gas price P 气 is 0.9.

[0162] S72, the total cost difference of by-products is

[0163] S73. Calculate the total cost difference of low volatile by-products of low volatile coal blending scheme in,

[0164] The total cost difference of high volatile by-products of high volatile coal blending scheme is calculated. in,

[0165] Calculate the baseline by-product total cost difference for the baseline coal blending solution

[0166] Step S8: Calculate the final coal blending cost of each coal blending scheme The following steps are included.

[0167] S81. The final coal blending cost calculation formula is:

[0168] S82. Calculate the final low volatility coal blending cost of the low volatility coal blending solution in,

[0169] Calculate the final high volatile coal blending cost of the high volatile coal blending scheme in,

[0170] Calculate the benchmark final coal blending cost of the benchmark coal blending solution in,

[0171] Step S9, the final coal blending costs of the coal blending schemes are compared. The final coal blending cost of the low-volatile coal blending scheme is the lowest, and the low-volatile coal blending scheme is the optimal coal blending structure.

[0172] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for optimizing the coal blending structure of a top-charging coke oven, characterized in that: The following steps are involved: Step S1, formulating a coal blending scheme, which includes a low volatility scheme, a high volatility scheme and a benchmark scheme; Step S2: Calculate the mixed coal price P of each coal blending scheme i 、Mixed volatile matter V i and mixed ash A i ; Step S3: Calculate the theoretical coal consumption B of each coal blending scheme i理 ; Step S4: Calculate the dry basis coal consumption B of each coal blending scheme i干 ; Step S5: Calculate the mixed coal blending cost L of each coal blending scheme i ; Step S6: Calculate the coke production cost difference ΔL of each coal blending scheme i产 ; Step S7: Calculate the total cost difference ΔL of by-products of each coal blending scheme i副 ; Step S8: Calculate the final coal blending cost L of each coal blending scheme i总 ; Step S9: compare the final coal blending costs of the coal blending schemes, and select the coal blending scheme with the lowest final coal blending cost as the optimal coal blending structure.

2. The method for optimizing the coal blending structure of a top-charging coke oven according to claim 1, characterized in that: The step S1 comprises the following steps: Step S11: Input the unit price of coking coal P 主 、Volatile matter of coking coal 主 And main coking coal ash A 主 ; Enter the unit price of fat coal P 肥 、Fat coal volatile matter V 肥 Hefei coal ash content A 肥 ; Input gas coal unit price P 气 、Volatile matter of gas coal 气 Heqi coal ash content A 气 ; Enter lean coal unit price P 瘦 、Lean coal volatile matter V 瘦 and lean coal ash content A 瘦 ; Enter 1 / 3 coking coal unit price P 焦 、1 / 3 coking coal volatile matter V 焦 and 1 / 3 of coking coal ash A 焦 ; Step S12: Low volatility solution includes a ratio of X 1主 The main coking coal, the proportion is X 1肥 The fat coal, the proportion is X 1气 Gas coal, with a ratio of X 1瘦 Lean coal and proportion X 1焦 1 / 3 of coking coal; high volatility solutions include a ratio of X 2主 The main coking coal, the proportion is X 2肥 The fat coal, the proportion is X 2气 Gas coal, with a ratio of X 2瘦 Lean coal and proportion X 2焦 1 / 3 of coking coal; the benchmark solution includes a ratio of X 3主 The main coking coal, the proportion is X 3肥 The fat coal, the proportion is X 3气 Gas coal, with a ratio of X 3瘦 Lean coal and proportion X 3焦 1 / 3 of coking coal; Step S13: If the low volatility solution, the high volatility solution and the benchmark solution all meet the established conditions, proceed to step S2; if the low volatility solution, the high volatility solution and the benchmark solution do not meet the established conditions, proceed to step S12.

3. The method for optimizing the coal blending structure of a top-charging coke oven according to claim 2, characterized in that: The conditions set in step S13 include: 25%≤X 1主 ≤35%; 15%≤X 1肥 ≤25%;0≤X 1气 ≤5%; 25%≤X 1瘦 ≤35%; 10%≤X 1焦 ≤20%;25%≤X 2主 ≤35%; 15%≤X 2肥 ≤25%;0≤X 2气 ≤5%;15%≤X 2瘦 ≤25%; 20%≤X 2焦 ≤30%; 25%≤X 3主 ≤35%; 15%≤X 3肥 ≤25%;0≤X 3气 ≤5%; 20%≤X 3瘦 ≤30%; 15%≤X 3焦 ≤25%;X 1瘦 ≠X 2瘦 ≠X 3瘦 or X 1焦 ≠X 2焦 ≠X 3焦 ;X 1主 +X 1肥 +X 1气 +X 1瘦 +X 1焦 =100%;X 2主 +X 2肥 +X 2气 +X 2瘦 +X 2焦 =100%;X 3主 +X 3肥 +X 3气 +X 3瘦 +X 3焦 =100%.

4. The method for optimizing the coal blending structure of a top-charging coke oven according to claim 2, characterized in that: The step S2 comprises the following steps: S21. The price of the blended coal is Pi = Xi 主 ×Pmain + Xi 瘦 ×Plean + Xi 肥 ×Pfat + Xi 焦 ×Pcoke + Xi 气 ×Pgas, (i = 1, 2, 3); The volatile matter blend is Vi = Xi 主 × Vmain + Xi 瘦 × Vlean + Xi 肥 × Vfat + Xi 焦 × Vcoke + Xi 气 × Vgas, (i = 1, 2, 3); The mixed ash content is Ai=Xi 主 ×A master + Xi 瘦 ×A Thin + Xi 肥 ×A fertilizer + Xi 焦 ×A + Xi 气 ×A gas, (i=1,2,3); S22. Calculate the low volatile mixed coal price P1, low volatile mixed volatile matter V1 and low volatile mixed ash A1 of the low volatile coal blending scheme; calculate the high volatile mixed coal price P2, high volatile mixed volatile matter V2 and high volatile mixed ash A2 of the high volatile coal blending scheme; calculate the benchmark mixed coal price P3, benchmark mixed volatile matter V3 and benchmark mixed ash A3 of the benchmark coal blending scheme.

5. The method for optimizing the coal distribution structure of a top-charging coke oven according to claim 4, characterized in that: The step S3 comprises the following steps: Step S31, input the first empirical formula coefficient C1, C1 = 98; input the second empirical formula coefficient C2, Step S32, theoretical coal consumption formula is: Step S33: Calculate the low volatility theoretical coal consumption of the low volatility coal blending scheme The high volatility theoretical coal consumption of high volatility coal blending scheme is calculated Calculate the benchmark theoretical coal consumption of the benchmark coal blending scheme 6. The method for optimizing the coal blending structure of a top-charging coke oven according to claim 5, characterized in that: The step S4 comprises the following steps: Step S41: Enter the CDQ loss C 干 ; Step S42, dry basis coal consumption formula is: Step S43: Calculate the low volatile dry basis coal consumption of the low volatile coal blending scheme The high volatile dry basis coal consumption of the high volatile coal blending scheme is calculated Calculate the benchmark dry coal consumption of the benchmark coal blending scheme 7. The method for optimizing the coal blending structure of a top-charging coke oven according to claim 6, characterized in that: The step S5 comprises the following steps: Step S51: The cost formula of mixed coal blending is: Step S52, calculate the low-volatile mixed coal blending cost L1 of the low-volatile coal blending scheme; calculate the high-volatile mixed coal blending cost L2 of the high-volatile coal blending scheme; calculate the benchmark mixed coal blending cost L3 of the benchmark coal blending scheme.

8. The method for optimizing the coal blending structure of a top-charging coke oven according to claim 6, characterized in that: The step S6 comprises the following steps: Step S61, enter the processing cost of the coking plant as C 加 and coke benefit C 效 ; S62, Coke production cost difference formula Step S63: Calculate the low volatility coke production cost difference of the low volatility coal blending scheme The difference in production cost of high volatile coke for high volatile coal blending scheme is calculated. Calculate the benchmark coke production cost difference of the benchmark coal blending solution 9. The method for optimizing the coal blending structure of a top-charging coke oven according to claim 4, characterized in that: The step S7 comprises the following steps: S71, calculate the low volatile difference ΔV1, ΔV1 = V1-V3; calculate the high volatile difference ΔV2, ΔV2 = V2-V3; calculate the base volatile difference ΔV3, ΔV3 = V3-V3 = 0; enter the crude benzene yield change C when the volatile content changes by 1% 苯 , when the volatile matter changes by 1%, the change in tar yield C 焦 、Change in ammonium sulfate yield when the volatile matter changes by 1% C 铵 The change in gas yield when the volatile matter changes by 1% C 气 ; Enter crude benzene unit price P 苯 , Tar unit price P 焦 、Ammonium sulfate unit price P 铵 and gas unit price P 气 ; S72, the total cost difference of by-products is S73. Calculate the total cost difference of low volatile by-products of low volatile coal blending scheme The total cost difference of high volatile by-products of high volatile coal blending scheme is calculated. Calculate the baseline by-product total cost difference for the baseline coal blending solution 10. The method for optimizing the coal blending structure of a top-charging coke oven according to claim 1, characterized in that: The step S8 comprises the following steps: S81. The final coal blending cost calculation formula is: S82. Calculate the final low volatility coal blending cost of the low volatility coal blending solution Calculate the final high volatile coal blending cost of the high volatile coal blending scheme Calculate the benchmark final coal blending cost of the benchmark coal blending solution

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