A method and system for adjusting the volatile matter content of coal

Abstract

This application discloses a method and system for adjusting the volatile matter content of blended coal. The method is applied to an adjustment system and includes: obtaining high-volatile coal and low-volatile coal from a first database based on a preset first quality requirement; obtaining a first blending ratio from a second database, wherein the coal types in the first blending ratio include the high-volatile coal and the low-volatile coal; obtaining first data from the first database based on the first blending ratio, wherein the first data is the delivered price of the coal type corresponding to the first blending ratio; calculating the price difference between the delivered prices of the high-volatile coal and the low-volatile coal, and comparing the first calculation result with a preset threshold to obtain a first comparison result. This method is simple to operate, highly efficient, and provides strong guidance, laying the foundation for maximizing the production efficiency of blended coal coking.

Description

Technical Field

[0001] This application relates to the field of coking technology in the coking industry, and in particular to a method and system for adjusting the volatile matter in blended coal. Background Technology

[0002] Volatile matter content of coal fed into the furnace is a crucial indicator in coking coal blending. It not only affects coke quality and production smoothness but also significantly impacts blending costs, ultimately affecting overall efficiency. Currently, the volatile matter content of coal fed into the furnace is generally controlled between 24% and 32%, with top-charge coke coal typically controlled between 24% and 28% and tamped coke coal typically controlled between 26.5% and 32%. The control range for volatile matter content in tamped coke is relatively higher and wider than that for top-charge coke, mainly because the tamping process can increase the bulk density of tamped coke, allowing for the use of more high-volatile coal.

[0003] Different volatile matter content of coal fed into the furnace results in different coke quality, product yield, blending costs, and overall benefits. The volatile matter content of the coal fed into the furnace is determined by the volatile matter content and proportion of each individual coal in the blend. Since the prices of each individual coal are not fixed at different times, and the price differences between them can be positive or negative, large or small, appropriate individual coals need to be selected and their proportions adjusted at different times to ensure the volatile matter content of the coal fed into the furnace is at its optimal value. Therefore, how to efficiently and accurately adjust coking coal blending production parameters to adapt to price parameters has become an urgent problem to be solved. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a method and system for adjusting the volatile matter content of blended coal. This system is used to efficiently and accurately adjust the proportion of each type of coal while ensuring coke quality and smooth production, thereby maximizing profits by minimizing the coal blending price.

[0005] One objective of this application is to provide a method for adjusting the volatile matter content of blended coal, applied to an adjustment system, the method comprising:

[0006] Based on a preset first quality requirement, high-volatile coal and low-volatile coal are obtained through a first database, wherein the first quality requirement is the volatile matter content (V) of the high-volatile coal. daf ≥35%, the volatile matter V of the low volatile coal daf ≤20%, the other indicators of the high volatile coal and the low volatile coal meet the ash content A standard. d The difference should not exceed ±3%, and the sulfur content (S) t The difference should not exceed ±1%, the difference in the adhesion index G value should not exceed ±5, and the difference in the adhesive layer thickness Y value should not exceed ±3mm;

[0007] The first proportion is obtained through the second database, wherein the coal types in the first proportion include the high volatile coal and the low volatile coal;

[0008] Based on the first ratio, first data is obtained through the first database, wherein the first data is the delivered price of the coal type corresponding to the first ratio;

[0009] Calculate the price difference between the high-volatile coal and the low-volatile coal delivered to the plant, and compare the first calculation result with a preset threshold to obtain a first comparison result;

[0010] Based on the first comparison result and the preset second quality requirement, the ratio of the high-volatile coal and the low-volatile coal is adjusted to obtain a second blending ratio, wherein the second quality requirement is that the volatile matter content of the adjusted blended coal is ≤26.5% V. daf ≤32%, Ash content A d ≤9.8% sulfur content S t ≤0.85%, adhesion index G value ≥65, adhesive layer thickness Y value ≥12.5mm;

[0011] Under the condition that the blended coal has been burned based on the second ratio, the second data of the coke obtained after combustion is obtained, wherein the second data is an index of the coal type corresponding to the second ratio;

[0012] The second data is calculated, and the second calculation result is compared with a preset qualified node to obtain a second comparison result, wherein the qualified node is the ash content A of the coke obtained after combustion. d ≤13%, sulfur content S t ≤0.7%, post-reaction coke strength CSR≥60%, coke crush resistance index M 25 ≥90%.

[0013] As an optional embodiment, the step of calculating the price difference between the high-volatile coal and the low-volatile coal delivered to the plant, and comparing the first calculation result with a preset threshold to obtain a first comparison result includes:

[0014] Based on the delivered price, the price difference between the high-volatile coal and the low-volatile coal is calculated, and the price difference is compared with the preset threshold to obtain a first comparison result.

[0015] As an optional embodiment, the first comparison result includes both adjusted and unadjusted values, and comparing the price difference with the preset threshold to obtain the first comparison result includes:

[0016] If the price difference falls within the range of the preset threshold, then the first comparison result is no adjustment.

[0017] If the price difference does not fall within the range of the preset threshold, then the first comparison result is an adjustment.

[0018] As an optional embodiment, if the first comparison result is no adjustment, the obtained second ratio is the same as the first ratio;

[0019] If the first comparison result is an adjustment, the obtained second ratio is different from the first ratio.

[0020] As an optional embodiment, if the price difference does not fall within the range of the preset threshold, then the first comparison result for adjustment includes:

[0021] If the price difference is less than the minimum value of the preset threshold, the proportion of high volatile coal and low volatile coal is increased and decreased based on a preset fluctuation degree, wherein the preset fluctuation degree is greater than 1%.

[0022] If the price difference is greater than the maximum value of the preset threshold, the proportion of high volatile coal and low volatile coal is reduced based on the preset fluctuation level.

[0023] As an optional embodiment, the second comparison result includes qualified and unqualified, and the calculation of the second data and the comparison of the second calculation result with a preset qualified node to obtain the second comparison result includes:

[0024] If the second calculation result falls within the range of the qualified nodes, then the second comparison result is qualified;

[0025] If the second calculation result does not fall within the range of the qualified nodes, then the second comparison result is unqualified.

[0026] As an optional embodiment, the adjustment method further includes:

[0027] If the second comparison result is satisfactory, then the third data is obtained.

[0028] As an optional embodiment, the adjustment method further includes:

[0029] If the second comparison result is unqualified, the ratio of the high volatile coal and the low volatile coal is adjusted again based on the preset second quality requirements to obtain a third ratio.

[0030] One objective of this application is to provide a system for adjusting the volatile matter content of coal, comprising:

[0031] The first acquisition module is configured to acquire high-volatile coal and low-volatile coal from a first database based on a preset first quality requirement, wherein the first quality requirement is the volatile matter content (V) of the high-volatile coal. daf ≥35%, the volatile matter V of the low volatile coal daf ≤20%, the other indicators of the high volatile coal and the low volatile coal meet the ash content A standard. d The difference should not exceed ±3%, and the sulfur content (S) t The difference should not exceed ±1%, the difference in the adhesion index G value should not exceed ±5, and the difference in the adhesive layer thickness Y value should not exceed ±3mm;

[0032] The second acquisition module is configured to acquire the first proportion through the second database, wherein the coal types in the first proportion include the high volatile coal and the low volatile coal;

[0033] The third acquisition module is configured to acquire first data through a first database based on the first ratio, wherein the first data is the delivered price of the coal type corresponding to the first ratio;

[0034] The first calculation module is configured to calculate the price difference between high volatile coal and low volatile coal delivered to the plant, and compare the first calculation result with a preset threshold to obtain a first comparison result;

[0035] The adjustment module, based on the first comparison result and a preset second quality requirement, adjusts the ratio of the high-volatile coal and the low-volatile coal to obtain a second blending ratio, wherein the second quality requirement is that the volatile matter content of the adjusted blended coal is ≤26.5% V. daf ≤32%, Ash content A d ≤9.8% sulfur content S t ≤0.85%, adhesion index G value ≥65, adhesive layer thickness Y value ≥12.5mm;

[0036] The fourth acquisition module is configured to acquire second data of the coke obtained after combustion when the blended coal has been burned based on the second ratio, wherein the second data is an index of the coal type corresponding to the second ratio;

[0037] The second calculation module is configured to calculate the second data and compare the second calculation result with a preset qualified node to obtain a second comparison result, wherein the qualified node is the ash content A of the coke obtained after combustion. d ≤13%, sulfur content S t ≤0.7%, post-reaction coke strength CSR≥60%, coke crush resistance index M 25 ≥90%.

[0038] The beneficial effects of the embodiments of this application are as follows:

[0039] This method is simple to operate, highly efficient, and provides strong guidance, laying the foundation for maximizing the production benefits of blended coking. While ensuring coke quality remains constant, the volatile matter content of the blended coal is increased or decreased by adjusting the proportions of representative high-volatile and low-volatile coals (while keeping other individual coal types constant). This efficient and accurate adjustment of the proportions of each individual coal type, while maintaining coke quality and smooth production, further improves economic efficiency by: firstly, minimizing the blended coal price to maximize profits; and secondly, by reducing the blended coal price, thus providing guidance for adjusting production and procurement strategies. Attached Figure Description

[0040] Figure 1 This is a flowchart of the adjustment method according to an embodiment of this application;

[0041] Figure 2 This is a flowchart of S4 in the adjustment method of this application embodiment;

[0042] Figure 3 This is a flowchart of S42 in the adjustment method of this application embodiment;

[0043] Figure 4 This is a flowchart of S7 in the adjustment method of this application embodiment;

[0044] Figure 5 This is a schematic diagram of the adjustment system according to an embodiment of this application.

[0045] Figure label:

[0046] 100, First Acquisition Unit; 200, Second Acquisition Unit; 300, Third Acquisition Unit; 400, First Calculation Unit; 500, Adjustment Unit; 600, Fourth Acquisition Unit; 700, Second Calculation Unit. Detailed Implementation

[0047] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0048] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0049] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0050] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0051] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0052] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0053] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0054] This specification may use the phrases “in one embodiment of a method for adjusting the volatile matter content of blended coal to reduce the price of blended coal,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0055] One objective of this application is to provide a method for adjusting the volatile matter content of coal, applicable to an adjustment system, such as... Figure 1 As shown, the method includes:

[0056] S1. Based on the preset first quality requirements, high volatile coal and low volatile coal are obtained through the first database; the first database stores multiple different coal types and corresponding index information for each coal type.

[0057] Specifically, the high-volatile coal uses G 煤 It indicates that the low volatile coal used is D 煤 This indicates that, furthermore, among all commonly used single types of coal, the G... 煤 Select gas coal, the D 煤 Choose lean coking coal.

[0058] The first quality requirement includes: the G 煤 volatile matter V daf ≥35%, the D 煤 volatile matter V daf ≤20%. And, the G 煤 and the D 煤 Other indicators meet the requirements of ash content A d The difference should not exceed ±3%, and the sulfur content (S) tThe difference should not exceed ±1%, the difference in the adhesion index G value should not exceed ±5, and the difference in the adhesive layer thickness Y value should not exceed ±3mm.

[0059] S2. Obtain the first blending ratio through the second database, wherein the coal types in the first blending ratio include the high-volatile coal and the low-volatile coal. The second database stores multiple blending ratio information; specifically, the first blending ratio is a historical blending ratio used in production.

[0060] If the single type of coal in the selected first blend does not meet the first quality requirement, it means that the selected first blend cannot use the adjustment method of this application to adjust the volatile matter of the blended coal, and thus cannot achieve the effect of reducing the price of the blended coal. Therefore, the coal types in the first blend must include both the high-volatile coal and the low-volatile coal.

[0061] S3. Based on the first ratio, obtain first data through the first database, wherein the first data is the delivered price of the coal type corresponding to the first ratio.

[0062] S4. Calculate the price difference between the high-volatile coal and the low-volatile coal delivered to the plant, and compare the first calculation result with a preset threshold to obtain a first comparison result. As an optional embodiment, calculating the price difference between the high-volatile coal and the low-volatile coal delivered to the plant and comparing the first calculation result with a preset threshold to obtain a first comparison result includes:

[0063] Based on the delivered price, the price difference between the high-volatile coal and the low-volatile coal is calculated, and the price difference is compared with the preset threshold to obtain a first comparison result. Specifically, in the G... 煤 Factory price and the aforementioned D 煤 Based on the factory price, the price difference between the two is calculated to obtain the first calculation result; then the first calculation result is compared with the preset threshold set by the user in advance to obtain the first comparison result.

[0064] This application sets the preset threshold to 30 yuan / ton, and the preset threshold is not less than 10 yuan, so as to avoid the adjustment range of the blended coal price being too small due to the small range of the preset threshold, which would be detrimental to production stability.

[0065] As an optional embodiment, such as Figure 2 As shown, the first comparison result includes both adjusted and unadjusted results. The comparison of the price difference with the preset threshold to obtain the first comparison result includes:

[0066] S41. If the price difference falls within the range of the preset threshold, then the first comparison result is no adjustment. Specifically, if G 煤 Factory price and the aforementioned D 煤If the price difference at the factory gate does not exceed 30 yuan / ton, then the aforementioned G will not be adjusted. 煤 and the D 煤 The proportion.

[0067] S42. If the price difference does not fall within the range of the preset threshold, then the first comparison result is an adjustment. Specifically, if the G 煤 Factory price and the aforementioned D 煤 If the price difference at the factory gate exceeds 30 yuan / ton, and the price difference does not fall within the preset threshold range, then the G value will be adjusted. 煤 and the D 煤 The proportion.

[0068] As an optional embodiment, such as Figure 3 As shown, if the price difference does not fall within the range of the preset threshold, the first comparison result for adjustment includes:

[0069] S421. If the price difference is less than the minimum value of the preset threshold, the proportion of high-volatile coal and low-volatile coal is increased and decreased based on a preset fluctuation level. The preset fluctuation level is not less than 1%. Specifically, if the G 煤 The price delivered to the factory is less than the stated D 煤 If the price delivered to the factory exceeds 30 yuan / ton, then the aforementioned G will be added. 煤 The proportion (correspondingly reducing the D) 煤 (proportion), increase the volatile matter content of blended coal V daf .

[0070] S422. If the price difference is greater than the maximum value of the preset threshold, the proportion of high-volatile coal and low-volatile coal is reduced and increased based on a preset fluctuation level. The preset fluctuation level is greater than 1%. Specifically, if the G 煤 The price delivered to the factory is greater than the stated D 煤 If the price delivered to the factory exceeds 30 yuan / ton, then the aforementioned D will be added. 煤 Proportion (correspondingly reduce the G) 煤 (proportion), reduce the volatile matter content (V) of blended coal daf .

[0071] S5. Based on the first comparison result and the preset second quality requirement, adjust the ratio of the high-volatile coal and the low-volatile coal to obtain a second blending ratio, wherein the second quality requirement is that the volatile matter content of the adjusted blended coal is ≤26.5% V. daf ≤32%, Ash content A d ≤9.8% sulfur content S t ≤0.85%, adhesion index G value ≥65, adhesive layer thickness Y value ≥12.5mm.

[0072] As an optional embodiment, if the first comparison result is no adjustment, the obtained second ratio is the same as the first ratio; if the first comparison result is adjustment, the obtained second ratio is different from the first ratio.

[0073] S6. Under the condition that the blended coal has completed combustion based on the second ratio, obtain the second data of the coke obtained after combustion, wherein the second data is an indicator of the coal type corresponding to the second ratio. Specifically, it is necessary to conduct a 40kg small coke oven experiment on the blended coal that conforms to the second ratio to obtain the second data of the blended coal after combustion.

[0074] The experimental conditions for the 40kg small coke oven were as follows: the coal fed into the oven was compacted, and the compaction density was controlled between 0.95 and 1.05 t / m³. 3 The coking experiment was conducted using a 40kg electrically heated small coke oven, with a coking time of 16 hours; the coke cake center temperature was 950–1050℃; and wet quenching was used. This application follows Appendix A of the 40kg test coke oven test operation method in the ferrous metallurgical industry standard "Technical Specification for Small Coke Ovens for Coking Tests" YB / T4526-2016.

[0075] S7. Calculate the second data and compare the second calculation result with a preset qualified node to obtain a second comparison result. Specifically, calculating the second data yields the second calculation result, and the second settlement result is the various index values ​​of the blended coal. The preset qualified node is that the ash content Ad ≤ 13% and the sulfur content S of the coke obtained after combustion are... t ≤0.7%, post-reaction coke strength CSR≥60%, coke crush resistance index M 25 ≥90%.

[0076] As an optional embodiment, such as Figure 4 As shown, the second comparison result includes qualified and unqualified. The calculation of the second data and the comparison of the second calculation result with a preset qualified node to obtain the second comparison result includes:

[0077] S71. If the second calculation result falls within the range of the qualified node, then the second comparison result is qualified. That is, the second calculation result obtained and calculated after combustion meets the requirements of ash content Ad ≤ 13% and sulfur content S of coke. t ≤0.7%, post-reaction coke strength CSR≥60%, coke crush resistance index M 25 ≥90%.

[0078] S72. If the second calculation result does not fall within the range of the qualified node, then the second comparison result is unqualified. That is, the second calculation result obtained and calculated after combustion does not meet the requirements of ash content Ad≤13% and sulfur content S of coke.t ≤0.7%, post-reaction coke strength CSR≥60%, coke crush resistance index M 25 ≥90% range.

[0079] As an optional embodiment, the adjustment method further includes:

[0080] If the second comparison result is satisfactory, then third data is obtained. The third data is the blending price of the blended coal calculated based on the second proportion. Furthermore, if the second comparison result is satisfactory, it indicates that the blended coal based on the second proportion can be used in the production of a compacted coke oven.

[0081] As an optional embodiment, the adjustment method further includes:

[0082] If the second comparison result is unqualified, the ratio of the high volatile coal and the low volatile coal is adjusted again based on the preset second quality requirements to obtain a third ratio.

[0083] Specifically, if the second comparison result is unqualified, it means that the blended coal configured based on the second proportion cannot meet the qualified node, that is, the G... 煤 and the D 煤 The ratio is not suitable and needs to be readjusted until the obtained third ratio meets the qualified node.

[0084] An example is provided regarding the adjustment methods used in this application.

[0085] First example:

[0086] Select G from all commonly used single coal types 煤 and D 煤 The various indicators and prices delivered to the factory are shown in Table 1. Moreover, both indicators meet the preset first quality requirements.

[0087] Select one that is compatible with the G 煤 and the D 煤 The proportions used in production were used as the first proportion, and the blended coal index and blended coal price were calculated based on this, as shown in Table 2.

[0088] According to the G 煤 and the D 煤 The factory price, found that the G 煤 The price delivered to the factory is lower than that of D. 煤 The factory price is 95 yuan / ton. Comparing the price difference with a preset threshold, this difference does not fall within the range of the preset threshold; therefore, the price difference needs to be adjusted. 煤 and the D 煤 The proportion.

[0089] If the preset float level is set to 5%, then G needs to be increased. 煤 The proportion is 5%, reducing the D mentioned above. 煤 The proportion is 5%, then the volatile matter V of the coal is... daf It increased from 28.7% to 29.6%.

[0090] The second blending ratio is obtained through the above adjustments. The blending coal index and blending coal price obtained based on the second blending ratio are also shown in Table 2. The second blending ratio meets the second quality requirements.

[0091] A 40kg small coke oven experiment was conducted on the blended coal based on the second ratio. The quality of the coke obtained is shown in Table 3. It meets the preset qualified node range and satisfies the production requirements.

[0092] The blended coal prepared according to the second ratio was applied to a 5.5m tamping coke oven. The quality of the resulting coke is shown in Table 3, and there is no significant difference compared to the quality prepared according to the first ratio. The calculated reduction in the blended coal price is 10 yuan.

[0093] Table 1 shows the sample coal quality indicators and prices used in the first example.

[0094] <![CDATA[A d / %]]> <![CDATA[V daf / %]]> <![CDATA[S t，d / %]]> G value Y value / mm Current factory price / yuan <![CDATA[G 煤 ]]> 8.8 38.2 0.63 68 11 1905 <![CDATA[D 煤 ]]> 9.7 19.5 0.56 66 9 2100 contrast -0.9 18.7 0.07 2 2 -95

[0095] S t,d Total sulfur on a dry basis: the percentage of sulfur in coal under hypothetical dry, moisture-free conditions.

[0096] Table 2 shows the first and second blending ratios, their corresponding blending coal indicators, and blending coal prices in the first example.

[0097]

[0098] Table 3 shows the quality indicators obtained from coking in the first example using a 40kg small coke oven and a 5.5kg tamping coke oven.

[0099]

[0100] CRI: thermal reactivity of coke; M10: abrasion resistance index of coke.

[0101] Second example:

[0102] Select G from all commonly used single coal types 煤 and D 煤 The various indicators and prices delivered to the factory are shown in Table 1. Moreover, both indicators meet the preset first quality requirements.

[0103] Select one that is compatible with the G 煤 and the D 煤 The proportions used in production were used as the first proportion, and the blended coal index and blended coal price were calculated based on this, as shown in Table 4.

[0104] According to the G 煤 and the D 煤 The factory price, found G 煤 Price lower than D 煤 The price is 95 yuan / ton. Comparing the price difference with a preset threshold, this price difference does not fall within the range of the preset threshold. Therefore, it is necessary to adjust G. 煤 and the D 煤 The proportion.

[0105] Setting the preset float level to 9%, in this case, it is necessary to increase G. 煤 The proportion is 9%, reducing the D mentioned above. 煤 The proportion is 9%, then the volatile matter content of coal is V daf It increased from 28.7% to 30.4%.

[0106] The second blending ratio is obtained through the above adjustments. The blending coal index and blending coal price obtained based on the second blending ratio are also shown in Table 4. The second blending ratio meets the second quality requirements.

[0107] A 40kg small coke oven experiment was conducted on the blended coal based on the second ratio. The quality of the coke obtained is shown in Table 5. The CSR of the obtained coke was only 59.2%, which could not meet the preset qualified node. Therefore, the second ratio cannot be applied to a 5.5m tamping coke oven.

[0108] At this point, G needs to be readjusted. 煤 and the D 煤 The ratio is adjusted until the third ratio obtained meets the preset qualified node.

[0109] Table 4 shows the first and second blending ratios, their corresponding blending coal indicators, and blending coal prices in Example 2.

[0110]

[0111] Table 5 shows the quality indicators obtained from coking in the second example using a 40kg small coke oven and a 5.5kg tamping coke oven.

[0112]

[0113] Third example:

[0114] Select G from all commonly used single coal types 煤 and D 煤 Its various indicators and factory price are shown in Table 6. Its indicators are the same as those in Table 1, meeting the preset first quality requirements. Among them, G... 煤 The price is 1696 yuan, compared to D 煤 The price is 1648 yuan, which is 48 yuan higher.

[0115] Select one that is compatible with the G煤 and the D 煤 The proportions used in production were used as the first proportion, and the blended coal index and blended coal price were calculated based on this, as shown in Table 7.

[0116] According to the G 煤 and the D 煤 The factory price, found that the G 煤 The price is higher than that of D. 煤 The price is 48 yuan / ton. Comparing the price difference with a preset threshold, this price difference does not fall within the range of the preset threshold. Therefore, it is necessary to adjust the G... 煤 and the D 煤 The proportion.

[0117] Setting the preset float level to 7%, in this case, it is necessary to increase D. 煤 The proportion is 7%, reducing the G mentioned above. 煤 The proportion is 7%, then the volatile matter V of the coal is... daf It decreased from 28.7% to 27.4%.

[0118] The second blending ratio is obtained through the above adjustments. The blending coal index and blending coal price obtained based on the second blending ratio are also shown in Table 7. The second blending ratio meets the second quality requirements.

[0119] A 40kg small coke oven experiment was conducted on the blended coal based on the second ratio. The quality of the coke obtained is shown in Table 8. It meets the preset qualified node range and satisfies the production requirements.

[0120] The blended coal prepared according to the second ratio was applied to a 5.5m tamping coke oven, and the resulting coke quality is shown in Table 8. The quality of the coke was not significantly different from that prepared according to the first ratio. The calculation showed a reduction in the blended coal price of 3.4 yuan.

[0121] Table 6 shows the sample coal quality indicators and prices used in Example 3.

[0122] <![CDATA[A d / %]]> <![CDATA[V daf / %]]> <![CDATA[S t，d / %]]> G value Y value / mm Factory price / yuan <![CDATA[G 煤 ]]> 8.8 38.2 0.63 68 11 1696 <![CDATA[D 煤 ]]> 9.7 19.5 0.56 66 9 1648 contrast -0.9 18.7 0.07 2 2 48

[0123] Table 7 shows the first and second blending ratios, corresponding blending coal indicators, and blending coal prices in Example 3.

[0124]

[0125] Table 8 shows the quality indicators obtained from coking in the third example, conducted in a 40kg small coke oven and a 5.5kg tamping coke oven.

[0126]

[0127] Fourth example:

[0128] Select G from all commonly used single coal types 煤 and D煤 The various indicators and their prices at the factory gate are shown in Table 6. Moreover, both indicators meet the preset first quality requirements.

[0129] Select one that is compatible with the G 煤 and the D 煤 The proportions used in production were used as the first proportion, and the blended coal index and blended coal price were calculated based on this, as shown in Table 9.

[0130] According to the G 煤 and the D 煤 The factory price, found G 煤 Price higher than D 煤 The price is 48 yuan / ton. Comparing the price difference with a preset threshold, this price difference does not fall within the range of the preset threshold. Therefore, it is necessary to adjust the G... 煤 and the D 煤 The proportion.

[0131] With the preset float set to 12%, in this case, D needs to be increased. 煤 The proportion is 12%, reducing G 煤 The proportion is 12%, then the volatile matter content of the coal is V daf It decreased from 28.7% to 26.4%.

[0132] The second blending ratio is obtained through the above adjustments. The blending coal index and blending price based on the second blending ratio are also shown in Table 9, where the volatile matter V daf Does not meet the requirement of 26.5% ≤ V daf The requirement of ≤32% means that the second proportion does not meet the second quality requirement.

[0133] Readjust the G 煤 and the D 煤 The proportion is adjusted so that the fluctuation level is 10%, at which point the D is increased. 煤 The proportion is 10%, reducing the G mentioned above. 煤 The proportion is 10% to obtain the third blending ratio. The blending coal index and blending price obtained by the third blending ratio are also shown in Table 9, which meet the second quality requirements.

[0134] A 40kg small coke oven experiment was conducted on the blended coal based on the third ratio. The quality of the coke obtained is shown in Table 10, which meets the preset qualified range.

[0135] The blended coal based on the third proportion was applied to a 5.5m tamping coke oven, and the resulting coke quality is shown in Table 10. There was no significant difference in quality compared to the first proportion. The calculated reduction in blended coal price was 4.8 yuan.

[0136] Table 9 shows the first, second, and third blending ratios, their corresponding blending coal indicators, and blending coal prices in Example 4.

[0137]

[0138] Table 10 shows the quality indicators obtained from coking in the fourth example using a 40kg small coke oven and a 5.5kg tamping coke oven.

[0139]

[0140] One of the objectives of this application is to provide a system for adjusting the volatile matter content of coal, such as... Figure 5 As shown, it includes:

[0141] The first acquisition module 100 is configured to acquire high-volatile coal and low-volatile coal from a first database based on a preset first quality requirement, wherein the first quality requirement is the volatile content V of the high-volatile coal. daf ≥35%, the volatile matter V of the low volatile coal daf ≤20%, the other indicators of the high volatile coal and the low volatile coal meet the ash content A standard. d The difference should not exceed ±3%, and the sulfur content (S) t The difference should not exceed ±1%, the difference in the adhesion index G value should not exceed ±5, and the difference in the adhesive layer thickness Y value should not exceed ±3mm;

[0142] The second acquisition module 200 is configured to acquire the first proportion through the second database, wherein the coal types in the first proportion include the high volatile coal and the low volatile coal;

[0143] The third acquisition module 300 is configured to acquire first data through the first database based on the first ratio, wherein the first data is the delivered price of the coal type corresponding to the first ratio;

[0144] The first calculation module 400 is configured to calculate the price difference between the high volatile coal and the low volatile coal delivered to the plant, and compare the first calculation result with a preset threshold to obtain a first comparison result;

[0145] The adjustment module 500, based on the first comparison result and a preset second quality requirement, adjusts the ratio of the high-volatile coal and the low-volatile coal to obtain a second blending ratio, wherein the second quality requirement is that the volatile matter content of the adjusted blended coal is ≤26.5% V. daf ≤32%, Ash content A d ≤9.8% sulfur content S t ≤0.85%, adhesion index G value ≥65, adhesive layer thickness Y value ≥12.5mm;

[0146] The fourth acquisition module 600 is configured to acquire second data of the coke obtained after combustion when the blended coal has been burned based on the second ratio, wherein the second data is an index of the coal type corresponding to the second ratio;

[0147] The second calculation module 700 is configured to calculate the second data and compare the second calculation result with a preset qualified node to obtain a second comparison result, wherein the qualified node is the ash content A of the coke obtained after combustion. d ≤13%, sulfur content S t ≤0.7%, post-reaction coke strength CSR≥60%, coke crush resistance index M 25 ≥90%. The various modules of the adjustment system are used to implement each step of the adjustment method. By adjusting the proportion of a single type of coal before coking, a coking experiment is conducted in a small coke oven to verify whether the proportion meets the expected coking requirements. The proportion of a single type of coal is adjusted until the result meets expectations.

[0148] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A method for adjusting the volatile matter content of blended coal, characterized in that, Applied to adjusting the system, the method includes: Based on a preset first quality requirement, high-volatile coal and low-volatile coal are obtained through a first database, wherein the first quality requirement is the volatile matter content (V) of the high-volatile coal. daf ≥35%, the volatile matter V of the low volatile coal daf ≤20%, the other indicators of the high volatile coal and the low volatile coal meet the ash content A standard. d The difference should not exceed ±3%, and the sulfur content (S) t The difference should not exceed ±1%, the difference in the adhesion index G value should not exceed ±5, and the difference in the adhesive layer thickness Y value should not exceed ±3mm; The first proportion is obtained through the second database, wherein the coal types in the first proportion include the high volatile coal and the low volatile coal; Based on the first ratio, first data is obtained through the first database, wherein the first data is the delivered price of the coal type corresponding to the first ratio; Calculate the price difference between the high-volatile coal and the low-volatile coal delivered to the plant, and compare the first calculation result with a preset threshold to obtain a first comparison result; Based on the first comparison result and the preset second quality requirement, the ratio of the high-volatile coal and the low-volatile coal is adjusted to obtain a second blending ratio, wherein the second quality requirement is that the volatile matter content of the adjusted blended coal is ≤26.5% V. daf ≤32%, Ash content A d ≤9.8% sulfur content (S) t ≤0.85%, adhesion index G value ≥65, adhesive layer thickness Y value ≥12.5mm; Under the condition that the blended coal has been burned based on the second ratio, the second data of the coke obtained after combustion is obtained, wherein the second data is an index of the coal type corresponding to the second ratio; The second data is calculated, and the second calculation result is compared with a preset qualified node to obtain a second comparison result, wherein the qualified node is the ash content A of the coke obtained after combustion. d ≤13%, sulfur content S t ≤0.7%, post-reaction coke strength CSR≥60%, coke crush resistance index M 25 ≥90%.

2. The adjustment method according to claim 1, characterized in that, The step of calculating the price difference between the high-volatile coal and the low-volatile coal delivered to the plant, and comparing the first calculation result with a preset threshold to obtain a first comparison result includes: Based on the delivered price, the price difference between the high-volatile coal and the low-volatile coal is calculated, and the price difference is compared with the preset threshold to obtain a first comparison result.

3. The adjustment method according to claim 2, characterized in that, The first comparison result includes both adjusted and unadjusted results. The comparison of the price difference with the preset threshold to obtain the first comparison result includes: If the price difference falls within the range of the preset threshold, then the first comparison result is no adjustment. If the price difference does not fall within the range of the preset threshold, then the first comparison result is an adjustment.

4. The adjustment method according to claim 3, characterized in that, If the first comparison result is no adjustment, the obtained second ratio is the same as the first ratio; If the first comparison result is an adjustment, the obtained second ratio is different from the first ratio.

5. The adjustment method according to claim 4, characterized in that, If the price difference does not fall within the range of the preset threshold, then the first comparison result is adjusted, including: If the price difference is less than the minimum value of the preset threshold, the proportion of high volatile coal and low volatile coal is increased and decreased based on a preset fluctuation degree, wherein the preset fluctuation degree is greater than 1%. If the price difference is greater than the maximum value of the preset threshold, the proportion of high volatile coal and low volatile coal is reduced based on the preset fluctuation level.

6. The adjustment method according to claim 1, characterized in that, The second comparison result includes qualified and unqualified. The calculation of the second data and the comparison of the second calculation result with a preset qualified node to obtain the second comparison result includes: If the second calculation result falls within the range of the qualified nodes, then the second comparison result is qualified; If the second calculation result does not fall within the range of the qualified nodes, then the second comparison result is unqualified.

7. The adjustment method according to claim 6, characterized in that, The adjustment method further includes: If the second comparison result is satisfactory, then the third data is obtained.

8. The adjustment method according to claim 6, characterized in that, The adjustment method further includes: If the second comparison result is unqualified, the ratio of the high volatile coal and the low volatile coal is adjusted again based on the preset second quality requirements to obtain a third ratio.

9. A system for adjusting the volatile matter content of coal, characterized in that, include: The first acquisition module is configured to acquire high-volatile coal and low-volatile coal from a first database based on a preset first quality requirement, wherein the first quality requirement is the volatile matter content (V) of the high-volatile coal. daf ≥35%, the volatile matter V of the low volatile coal daf ≤20%, the other indicators of the high volatile coal and the low volatile coal meet the ash content A standard. d The difference should not exceed ±3%, and the sulfur content (S) t The difference should not exceed ±1%, the difference in the adhesion index G value should not exceed ±5, and the difference in the adhesive layer thickness Y value should not exceed ±3mm; The second acquisition module is configured to acquire the first proportion through the second database, wherein the coal types in the first proportion include the high volatile coal and the low volatile coal; The third acquisition module is configured to acquire first data through a first database based on the first ratio, wherein the first data is the delivered price of coal corresponding to the first ratio. The first calculation module is configured to calculate the price difference between the high volatile coal and the low volatile coal delivered to the plant, and compare the first calculation result with a preset threshold to obtain a first comparison result; The adjustment module, based on the first comparison result and a preset second quality requirement, adjusts the ratio of the high-volatile coal and the low-volatile coal to obtain a second blending ratio, wherein the second quality requirement is that the volatile matter content of the adjusted blended coal is ≤26.5% V. daf ≤32%, Ash content A d ≤9.8% sulfur content (S) t ≤0.85%, adhesion index G value ≥65, adhesive layer thickness Y value ≥12.5mm; The fourth acquisition module is configured to acquire second data of the coke obtained after combustion when the blended coal has been burned based on the second ratio, wherein the second data is an index of the coal type corresponding to the second ratio; The second calculation module is configured to calculate the second data and compare the second calculation result with a preset qualified node to obtain a second comparison result, wherein the qualified node is the ash content A of the coke obtained after combustion. d ≤13%, sulfur content S t ≤0.7%, post-reaction coke strength CSR≥60%, coke crush resistance index M 25 ≥90%.

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