Improved method for programming a large coke oven pushing operation sequence

Abstract

This invention relates to an improved method for compiling a coke pushing operation sequence for large coke ovens. The improved method involves compiling a 2-1 coke pushing sequence plus the number of gas collecting pipe segments (n) plus the number of offset segments (m). Based on the 2-1 coke pushing sequence and considering the number of gas collecting pipe segments (n) of the furnace group, the improved coke oven operation sequence is generated by changing the planned offset segment number (m). This provides multiple operational options for the production management of large coke ovens. The generated improved coke oven operation sequence is then used in conjunction with the coke oven's turnaround time, operating time, and maintenance schedule to create a coke oven operation plan. The advantages of this invention are: it solves the problem of poor gas collecting pipe pressure regulation performance in large coke ovens; the traditional 2-1 coke pushing sequence compilation method is only one form of the improved coke pushing operation sequence; the improved coke pushing operation sequence has wider applicability and provides more operational options for the production management of large coke ovens.

Description

Technical Field

[0001] This invention relates to the field of coke oven operation and management technology, and in particular to an improved method for programming the coke pushing operation sequence of a large coke oven. Background Technology

[0002] The management of coke oven pushing operations in the coking industry is a fundamental task, and determining the pushing sequence is the basis for developing a pushing operation plan. Generally, the pushing sequence for a coke oven is determined by the oven type and the configuration of the operating vehicles. Commonly used pushing sequences for coke ovens are 2-1, 5-2, and 9-2 sequences. With the continuous development of coke oven technology, larger coke ovens are a growing trend. Due to the increased size of large coke ovens, the 2-1 sequence is typically chosen. This pushing sequence offers advantages such as multiple operations being possible with a single vehicle alignment, compact vehicles, low investment, and low idle time, resulting in high efficiency. Furthermore, when pushing coke, the coking cycle of adjacent carbonization chambers is in the middle, which is beneficial for resisting the pressure on both sides during pushing. However, this pushing sequence also has many disadvantages. The most serious consequence is that it causes a very uneven distribution of gas production along the gas collecting pipe, making it difficult to control and adjust the gas collecting pipe pressure, resulting in large fluctuations. To expedite the removal of raw coal gas from the gas collecting pipes, their dimensions have been excessively large. This results in significant pressure fluctuations within the gas collecting pipes, leading to unstable pressure within the furnace and frequent instances of smoke and fire. This severely impacts the safe and continuous production of the coke oven, affecting environmental protection and the safety of downstream gas purification processes. Furthermore, the unstable pressure regime in the coke oven's carbonization chamber increases maintenance workload, and prolonged operation under these conditions can significantly shorten the oven's lifespan. From a design perspective, modern large coke ovens generally employ segmented gas collecting pipe designs. While this approach can accelerate the removal of raw coal gas from gas collecting pipes based on a 2-1 operating sequence to some extent, mitigating the uneven gas production distribution along the pipe direction, the lack of coordinated operational management means this problem cannot be fundamentally solved.

[0003] The current coking industry requires a comprehensive upgrade in the design level of large coke ovens, while also improving the management and control of coke oven production. Combining the design, operation management, and production control of coke ovens and taking a holistic approach to comprehensively improve the overall level of large coke ovens in the coking industry has become an important issue for the industry.

[0004] The current method for programming the 2-1 coke pushing operation sequence in large coke ovens has the following issues:

[0005] 1. This results in uneven distribution of gas production along the direction of the gas collecting pipe.

[0006] 2. The pressure control of the gas collecting pipe is not easy to adjust, and the fluctuations are large.

[0007] 3. The segmented design of the gas collecting pipe of large coke ovens lacks coordination with operation and management, and the method of compiling the coke pushing operation sequence is simple and inflexible.

[0008] The lack of a basis for optimizing the design of the gas collection pipe has resulted in unreasonable size design and control schemes for the gas collection pipe. Summary of the Invention

[0009] The purpose of this invention is to provide an improved method for programming the coke pushing operation sequence of a large coke oven. Based on the 2-1 coke oven coke pushing sequence and combined with the segmentation of the gas collecting pipe, an improved coke pushing operation sequence programming method with segment offset is given, providing more operational options for the production management of large coke ovens.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] An improved method for compiling a coke pushing operation sequence for a large coke oven is proposed. The improved method is based on a 2-1 coke pushing sequence plus the number of gas collecting pipe segments n plus the number of offset segments m. By changing the number of offset segments m in the planned compilation, an improved coke oven operation sequence is compiled, which provides multiple operation options for the production management of large coke ovens. The improved coke oven operation plan is compiled based on the generated improved coke oven operation sequence and the coke oven's turnaround time, operation time, and maintenance plan.

[0012] The mathematical formulas for the improved coke oven operation sequence include general calculation formulas and improved calculation formulas;

[0013] 1) The general calculation formula is as follows:

[0014] a) Mathematical formula for the number of furnaces per string in each segment:

[0015] A = S / n / 2 ①

[0016] In formula ①, S represents the number of furnaces in a furnace group, which is the number of furnaces in a coking plan, consisting of 1 coking oven or 2 coking ovens;

[0017] When the number of furnaces A in a single string of each segment is not an integer, the value of A is carried up, which is equivalent to increasing the number of furnaces S in the furnace group, so that the number of furnaces A in a single string of each segment is an integer. The number of furnaces in the furnace group after the increase is S'. The plan is calculated according to S'. The calculated coking operation sequence result will have redundant furnace numbers. Remove the added redundant furnace numbers from the calculation result. The calculation result can be verified as reasonable through the coking operation sequence.

[0018] b) Mathematical formula for the planned offset base:

[0019] K = [A / m] ②

[0020] In Formula ②, K represents the planned offset base, which is obtained by rounding down the A / m calculation result;

[0021] c) Mathematical formula for segment deviation:

[0022] P=AK*m ③

[0023] In formula ③, P represents the segmented deviation number;

[0024] d) Offset array:

[0025] K[1] = K;

[0026] K[m] = K+1 (m≤P+1);

[0027] K[m] = K(m>P+1);

[0028] The range of the planned offset segment number m is: 1 to A, m <= A;

[0029] 2) The improved calculation formula is as follows:

[0030]

[0031]

[0032]

[0033] Formula ④ represents the sequence of plans for odd-numbered furnaces, Formula ⑤ represents the sequence of plans for even-numbered furnaces, and Formula ⑥ represents the calculation of the offset variable.

[0034] in:

[0035] x...segment number (x = 1 to n)

[0036] y…Plan to assign offset segment numbers (y = 1 to m)

[0037] …Odd furnace number range operation array

[0038] …Even furnace number range operation array

[0039] SCH = Odd-numbered furnace plan sequence number + Even-numbered furnace plan sequence number, calculated using the following formula:

[0040]

[0041] In formula ⑦, SCH represents the sequence of the entire planned coking operation.

[0042] The application of the improved coke oven operation sequence programming is as follows:

[0043] 1) String sequence compilation to determine input conditions:

[0044] n: the number of gas collecting pipe sections in the furnace group;

[0045] m: Number of offset segments to be planned;

[0046] S: Number of furnaces in the furnace group;

[0047] 2) Calculate the number of furnaces A per string in each segment;

[0048] 3) Plan offset base K;

[0049] 4) Calculate the segment deviation number P;

[0050] 5) Offset array K[m];

[0051] 6) Sequential programming of odd-numbered furnace plans;

[0052] 7) Even-numbered furnace sequence planning;

[0053] 8) Compilation of the entire furnace plan sequence.

[0054] Verification of the rationality of the coking operation sequence includes judging the rationality of the coking time of adjacent furnace numbers, judging the rationality of the vehicle idle operation time, judging the rationality of the gas collecting pipe pressure stability, and judging the rationality of the temperature uniformity of the coke oven straight flue.

[0055] Compared with the prior art, the beneficial effects of the present invention are:

[0056] 1. Based on the traditional 2-1 coke oven coke pushing sequence, and considering the segmented gas collecting pipe, an improved coke pushing operation sequence compilation method with segmented offset is proposed. This solves the problem of poor pressure regulation performance of the gas collecting pipe in large coke ovens. The traditional 2-1 coke oven coke pushing sequence compilation method is only one case of the improved coke pushing operation sequence. The improved coke pushing operation sequence has a wider range of applications and provides more operational options for the production management of large coke ovens.

[0057] 2. The improved method for programming the focus pushing operation sequence makes the implementation of the improved focus pushing operation sequence program easier. The programming of the focus pushing operation sequence can be quickly achieved by adjusting the input conditions;

[0058] 3. An improved method for compiling coke pushing operation sequences combines the traditional 2-1 coke oven pushing with the design of the gas collecting pipe of a large coke oven. By changing the number of offset segments, a variety of coke pushing operation sequences can be compiled. Managers can select a reasonable number of offset segments based on actual operating results to generate a coke pushing operation sequence that meets the management and control requirements of a large coke oven. Based on the generated coke pushing operation sequence, the coke oven operation plan is compiled in conjunction with the coke oven's turnaround time, operating time, and maintenance plan.

[0059] 4. The principles for selecting the values ​​of n and m are given, which can be reasonably selected according to the actual situation of large coke ovens, making the compiled coke pushing operation sequence more suitable for the actual production control needs of large coke ovens, and improving the practicality of the method of the present invention.

[0060] 5. The rationality of the improved coke pushing operation sequence is given. The coke pushing operation sequence obtained after multiple rationality judgments is the most suitable for the actual production of large coke ovens and fully meets the coke pushing operation sequence compilation principle.

[0061] 6. Through repeated simulations and practices, the most suitable coke pushing operation sequence for large coke ovens can be obtained. The n and m values ​​at this time can be used as suggestions for the optimization design of large coke ovens to feed back into the design, thereby improving the design level of large coke ovens.

[0062] 7. The calculation method can be easily extended to improve the focus pushing operation sequence based on the 5-2 sequence and 9-2 sequence operation modes, and has strong generalizability. Attached Figure Description

[0063] Figure 1 This is a flowchart of an improved method for programming the coke pushing operation sequence in a large coke oven. Detailed Implementation

[0064] The present invention will now be described in detail with reference to the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0065] The following embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. Unless otherwise specified, the methods used in the following embodiments are conventional methods.

[0066]

Example 1

[0067] This invention, based on the traditional 2-1 coke pushing operation sequence programming method, and considering the segmented nature of the gas collecting pipe, presents an improved coke pushing operation sequence programming method with segmented offset. The application of this method can solve the problem of poor pressure regulation performance in the gas collecting pipe of large coke ovens. This coke pushing operation sequence programming method is more universal; the traditional 2-1 sequence programming method is merely one application of this invention. The invented method has wider applicability, providing more operational options for the production management of large coke ovens. This invention's improved 2-1-nm sequence programming method provides a general mathematical formula and application method for coke pushing sequence programming, improving the theoretical research level of coke oven coke pushing operation sequence programming, and simultaneously making the implementation of the improved coke pushing operation sequence program easier. This invention presents an improved 2-1-nm sequence planning method, where n is the number of gas collecting pipe segments in the furnace group and m is the planned number of offset segments. The method employs a 2-1 sequence plus the number of gas collecting pipe segments (n) plus the number of offset segments (m) to plan the coke pushing operation sequence. This combines the traditional 2-1 sequence with the design of the gas collecting pipe in large coke ovens. By changing the number of offset segments, various coke pushing operation sequences can be created. Managers can select a reasonable number of offset segments based on actual operating results to generate a coke pushing operation sequence that meets the management and control requirements of large coke ovens. Based on the generated coke pushing operation sequence, and considering the coke oven's turnaround time, operating time, and maintenance plan, a coke oven operation plan is then developed. This invention provides principles for selecting the values ​​of n and m, allowing for reasonable selection based on the actual conditions of large coke ovens. This makes the developed coke pushing operation sequence more suitable for the actual production control needs of large coke ovens, improving the practicality of the method. This invention presents an improved method for verifying the rationality of the coking operation sequence. The rationality judgment includes: assessing the rationality of coking time between adjacent furnace numbers, assessing the rationality of vehicle operation idle time, assessing the rationality of gas collecting pipe pressure stability, and assessing the rationality of temperature uniformity in the coke oven's straight flue. The coking operation sequence obtained through multiple rationality judgments is more scientific and reasonable, fully meeting the principles of coking operation sequence compilation. Through repeated simulations and practices, the method of this invention can obtain the most suitable coking operation sequence for large coke ovens. The n and m values ​​at this point can then serve as suggestions for optimizing the design of large coke ovens. This improved method for compiling an advanced coking operation sequence for large coke ovens meets the current requirements of the coking industry, improves the design level of large coke ovens, and enhances the production management and control level of large coke ovens. It combines the design, operation management, and production control of large coke ovens, comprehensively solving the problems existing in the traditional 2-1 coking operation sequence of large coke ovens.

[0068] To achieve the above objectives, the present invention employs the following technical solution:

[0069] 1. Implementing the object

[0070] Taking a large coke oven that uses a 2-1 coke pushing operation sequence to plan the coke pushing operation as the research object, the gas collecting pipe of the coke oven adopts a segmented design mode. Each segment of the gas collecting pipe uses a gas suction pipe to send the raw coal gas generated by the coke oven to the gas collection pipe in front of the furnace.

[0071] This improved method is based on the 2-1 coke oven pushing sequence and, combined with the segmentation of the gas collecting pipe, presents an improved method for compiling the pushing operation sequence with segmented offset.

[0072] 2. Segmented Design Analysis of Coke Oven Gas Collection Pipe

[0073] Analysis shows that segmentation of the coke oven gas collecting pipe has a significant impact on the pressure control of the gas collecting pipe. Simply segmenting the gas collecting pipe without improving the coke pushing operation sequence cannot fundamentally solve the uneven gas production distribution along the gas collecting pipe direction. Sometimes, it can even cause side effects, such as poor removal of raw gas from the gas collecting pipe near the segmentation point in the coke pushing operation sequence. Therefore, when using a segmented design for the gas collecting pipe in large coke ovens, a more suitable approach should be chosen. A combination of changing the coke pushing operation sequence and segmenting the gas collecting pipe design should be used to solve the problem of uneven gas collecting pipe pressure.

[0074] 3. Principles for Improving the Coke Pushing Operation Sequence Programming Method for Large Coke Ovens

[0075] The improved focus push operation sequence result should meet the following conditions:

[0076] a. When pushing coke into the carbonization chamber, both carbonization chambers on both sides must have sufficient expansion pressure;

[0077] b. The temperature fluctuations caused by coke pushing and coal charging in the entire furnace are minimal;

[0078] c. The pressure in the gas collecting pipe is evenly distributed along the direction of the coke oven, avoiding the unevenness of the gas collecting pipe caused by the traditional 2-1 coke pushing operation sequence.

[0079] d. Without changing the size of the vehicles, use the traditional 2-1 tandem vehicle sequence.

[0080] 4. Improved methods for programming the coke pushing operation sequence in large coke ovens

[0081] 1) Method introduction, the content is as follows:

[0082] The 2-1-nm sequence is used for coke pushing operation sequence compilation, where n is the number of gas collecting pipe segments in the furnace group and m is the planned offset segment number. An improved method of 2-1 sequence + n of the number of gas collecting pipe segments + m of the offset segment number is adopted for coke pushing operation sequence compilation. This method combines the traditional 2-1 sequence with the design of the coke oven gas collecting pipe, making the coke pushing operation sequence compilation more universal. By changing the number of offset segments, various coke pushing operation sequences can be compiled. Managers can select a reasonable number of offset segments based on actual operating results to generate a coke pushing operation sequence that meets the management and control requirements of large coke ovens. Based on the generated coke pushing operation sequence, the coke oven turnaround time, operating time, and maintenance plan are combined to compile a coke oven operation plan.

[0083] 2) The principles for choosing the value of n are as follows:

[0084] For coke ovens already in production, the value of n is a fixed value that can only be changed during the design phase. The value of n is determined by the process engineers based on future plans when designing a new coke oven. In principle, the number of segments in the gas collecting pipe affects the size of the gas collecting pipe. Each segment of the gas collecting pipe has a suction pipe with a regulating valve to adjust the pressure of the gas collecting pipe. Different coke pushing operation sequences directly affect the uniformity of raw gas production in each segment of the gas collecting pipe. Therefore, combining the number of gas collecting pipe segments n with the sequence planning method can optimize the design of the gas collecting pipe and achieve the gas collecting pipe pressure adjustment effect that meets the requirements of process production while satisfying the constraints of coke oven vehicle operation.

[0085] Given the number of furnaces S in the coke oven group, determine the number of sections n of the gas collecting pipe, as follows:

[0086] a. When the value of S is large (e.g., 120), the preferred value of n is generally 3;

[0087] b. When the value of S is small (e.g., less than 100), n is generally preferred to be 2.

[0088] c. Generally, the larger the value of m, the smaller the number of segments n can be; if n is small, the size of the gas collecting tube is larger and the pressure in the gas collecting tube is more uneven.

[0089] 3) The principles for selecting the value of m are as follows:

[0090] a. When m=1, the sequence of the focus pushing operation is consistent with the traditional 2-1 sequence. It can be seen that the traditional 2-1 sequence method is only one case of the 2-1-nm focus pushing operation sequence method. The 2-1-nm focus pushing operation sequence method is a more general sequence method.

[0091] b. When m is closer to the value of A, the planned offset is larger. At this time, the vehicle idle operation time is longer and the vehicle power consumption needs to be increased. However, since the operation sequence is evenly distributed in each section of the gas collection pipe, the amount of raw coal gas generated by the furnace hole corresponding to each section of the gas collection pipe is relatively uniform. As a result, the pressure distribution of each section of the gas collection pipe is also uniform, thereby improving the problem of controlling the pressure of the gas collection pipe.

[0092] Advantages of larger values ​​for c and m: The size of the gas collecting pipe can be reduced, decreasing the construction investment in the coke oven; the pressure in the gas collecting pipe is more uniform, making pressure control easier, reducing furnace leakage, and increasing furnace lifespan. It also reduces the occurrence of electrostatic precipitator shutdowns in subsequent gas purification processes caused by improper adjustment.

[0093] The disadvantage of large values ​​for d and m is that the biggest limitation is the long idle time of the vehicle, which puts a strain on the vehicle's operating time and increases the vehicle's energy consumption.

[0094] e. The general range of values ​​for m is 2, 3, 4, 5. It should be as small as possible, provided that the gas collection system can meet the pressure control requirements of the gas collection pipe through the control system.

[0095] The values ​​of f and m should ideally be divisible by the value of A. This ensures that the planned distribution is proportional, which is easier to manage, makes the temperature changes in the combustion chamber more regular, facilitates coke oven firing, and improves the uniformity of the fire channel temperature. It should be noted that the plan can also be compiled even if the value of m is not divisible by the value of A. The calculation method of this invention is applicable to the entire range of values ​​of m.

[0096] 4) Improved method for calculating string order, as follows:

[0097] S: Number of furnaces in a coke oven group - The number of furnaces in a coke pushing plan, generally consisting of 1 or 2 coke ovens, as shown in the formula below:

[0098] A = S / n / 2 ①

[0099] In formula ①, A represents the number of single-string furnaces in each segment;

[0100] Handling non-integer values ​​of A: If not divisible, carry over, equivalent to adding S, to make A an integer. The number of furnaces after the increase is S', and the plan is calculated based on S'. At this time, the calculated coke pushing operation sequence will have extra furnace numbers. Simply remove the extra furnace numbers from the calculation result, and the calculation result can pass the coke pushing operation sequence validity verification.

[0101] K = [A / m] ②

[0102] In Formula ②, K represents the planned offset base, which is obtained by rounding the A / M calculation result.

[0103] P=AK*m ③

[0104] In formula ③: P represents the segment deviation number.

[0105] The calculation method for K[m] is as follows:

[0106] K[1]=K

[0107] K[m] = K+1 (m≤P+1)

[0108] K[m] = K (m > P+1)

[0109] Where K[m] represents the offset array, the number of arrays is 1 to m; the range of the planned offset segment number m is 1 to A, m <= A.

[0110] Example of K[m] calculation, as follows:

[0111] Calculate the number of furnaces per string, A, and determine the P value based on different m values. Then, calculate the K[m] value based on A, m, K, and P. A value between 7 and 15 can basically cover the number of furnaces in existing large coke oven designs.

[0112] The following is a sample compilation example based on the formula given by the improved method described above:

[0113] a. When A=7

[0114] m = 2: K[1] = 3, K[2] = 4

[0115] m=3: K[1]=2, K[2]=3, K[3]=2

[0116] m=4: K[1]=1, K[2]=2, K[3]=2, K[4]=2

[0117] m=5: K[1]=1, K[2]=2, K[3]=2, K[4]=1, K[5]=1

[0118] b. When A=8

[0119] m = 2: K[1] = 4, K[2] = 4

[0120] m=3: K[1]=2, K[2]=3, K[3]=3

[0121] m=4: K[1]=2, K[2]=2, K[3]=2, K[4]=2

[0122] m=5: K[1]=1, K[2]=2, K[3]=2, K[4]=2, K[5]=1

[0123] c. When A = 9

[0124] m = 2: K[1] = 4, K[2] = 5

[0125] m = 3: K[1] = 3, K[2] = 3, K[3] = 3

[0126] m = 4: K[1] = 2, K[2] = 3, K[3] = 2, K[4] = 2

[0127] m = 5: K[1] = 1, K[2] = 2, K[3] = 2, K[4] = 2, K[5] = 2

[0128] d. When A = 10

[0129] m = 2: K[1] = 5, K[2] = 5

[0130] m = 3: K[1] = 3, K[2] = 4, K[3] = 3

[0131] m = 4: K[1] = 2, K[2] = 3, K[3] = 3, K[4] = 2

[0132] m = 5: K[1] = 2, K[2] = 2, K[3] = 2, K[4] = 2, K[5] = 2

[0133] e. When A = 11

[0134] m = 2: K[1] = 5, K[2] = 6

[0135] m = 3: K[1] = 3, K[2] = 4, K[3] = 4

[0136] m = 4: K[1] = 2, K[2] = 3, K[3] = 3, K[4] = 3

[0137] m = 5: K[1] = 2, K[2] = 3, K[3] = 2, K[4] = 2, K[5] = 2

[0138] f. When A = 12

[0139] m = 2: K[1] = 6, K[2] = 6

[0140] m = 3: K[1] = 4, K[2] = 4, K[3] = 4

[0141] m = 4: K[1] = 3, K[2] = 3, K[3] = 3, K[4] = 3

[0142] m = 5: K[1] = 2, K[2] = 3, K[3] = 3, K[4] = 2, K[5] = 2

[0143] g. When A = 13

[0144] m = 2: K[1] = 6, K[2] = 7

[0145] m=3: K[1]=4, K[2]=5, K[3]=4

[0146] m=4: K[1]=3, K[2]=4, K[3]=3, K[4]=3

[0147] m=5: K[1]=2, K[2]=3, K[3]=3, K[4]=3, K[5]=2

[0148] h, when A = 14

[0149] m = 2: K[1] = 7, K[2] = 7

[0150] m=3: K[1]=4, K[2]=5, K[3]=5

[0151] m=4: K[1]=3, K[2]=4, K[3]=4, K[4]=3

[0152] m=5: K[1]=2, K[2]=3, K[3]=3, K[4]=3, K[5]=3i, when A=15

[0153] m = 2: K[1] = 7, K[2] = 8

[0154] m=3: K[1]=5, K[2]=5, K[3]=5

[0155] m=4: K[1]=3, K[2]=4, K[3]=4, K[4]=4

[0156] m=5: K[1]=3, K[2]=3, K[3]=3, K[4]=3, K[5]=3

[0157] The improved formula for calculating the focus push operation sequence is as follows:

[0158]

[0159]

[0160]

[0161] Formula ④ is for the serial number of plans for odd-numbered furnaces, Formula ⑤ is for the serial number of plans for even-numbered furnaces, and Formula ⑥ is for calculating the offset variable, where x represents the segment number, x = 1 to n; y represents the offset segment number of the plan, y = 1 to m;

[0162] This represents the array of operations for the odd-numbered furnace number range; This represents the operation array for even-numbered furnace number segments; A represents the number of furnaces per string in each segment.

[0163] SCH = Odd-numbered furnace plan sequence + Even-numbered furnace plan sequence, as shown below:

[0164]

[0165] 5. Improved method for verifying the rationality of the focus pushing operation sequence

[0166] 1) Preliminary preparation of the coking plan, the contents of which are as follows:

[0167] Based on the coke oven's turnaround time, maintenance time, and single-furnace operation time, the coke pushing operation sequence SCH is calculated according to the above formula to pre-compile a coke pushing plan; the rationality of the pre-pushing plan is then assessed.

[0168] 2) The rationality judgment of coking time of adjacent furnace numbers, the contents of which are as follows:

[0169] a. When each furnace produces coke, the coking status of adjacent carbonization chambers is checked. During the 0 to 1 / 4 period of the entire coking cycle, the reasonableness of the coking time of adjacent furnace numbers is judged as unqualified. It is necessary to adjust the sequence conditions and recalculate the coke pushing operation sequence. This is because during this period, adjacent carbonization chambers are in the early stage of coking, and the pressure of the coke cake on the furnace walls on both sides is gradually increasing. The pressure is relatively small compared to the middle stage of coking, which can easily cause excessive pressure on one side of the furnace wall during coke pushing and damage the furnace body.

[0170] b. When each furnace produces coke, the coking status of adjacent carbonization chambers is checked. During the period from 3 / 4 to 1 / 4 of the entire coking cycle, the reasonableness of the coking time of adjacent furnace numbers is judged as unqualified. It is necessary to adjust the sequence conditions and recalculate the coke pushing operation sequence. This is because during this period, the adjacent carbonization chambers are in the late stage of coking. The coke cake in the carbonization chamber reacts violently. The coke cake will undergo a process of violent expansion and then rapid contraction. The pressure on the furnace wall will also change drastically. The pressure will increase rapidly and then drop rapidly until it drops to 0. During this period, the expansion force of the coke cake on both sides of the furnace wall changes too much, which can easily cause excessive pressure on one side of the furnace wall during coke pushing and damage the furnace body.

[0171] c. Verify that when each furnace produces coke, the analysis results show that the coking state of adjacent carbonization chambers is between 1 / 4 and 3 / 4 of the entire coking cycle, and the reasonableness of the coking time of adjacent furnace numbers is deemed acceptable. At this time, the pressure of the coke cake on both sides of the furnace wall reaches a stable value. When pushing coke into the current furnace, the coke cake is squeezed, which in turn squeezes the furnace walls on both sides. At this time, the expansion force of the coke cake on the furnace wall in the adjacent carbonization chambers is similar, and the pressure on both sides of the furnace wall is uniform. Under this condition, the impact of the coke pushing operation on the furnace body is minimal.

[0172] 3) Judgment of the reasonableness of vehicle operation idle time, including the following:

[0173] The operation time of each coke oven furnace is generally fixed. The 2-1 sequence operation of the vehicles ensures that coke pushing for the current furnace and coal charging for the previous furnace can be performed simultaneously at one position. Because the 2-1-nm sequence arrangement method of this invention uses a method based on gas collecting pipe segmentation n plus the planned offset segment number m, the vehicle's idle time increases with the increase of m. The vehicle's travel and operation capabilities will differ. If the vehicle's travel and operation time meet the requirements of the pre-arranged coke pushing plan, the vehicle's idle time is deemed reasonable. If the vehicle's travel and operation time do not meet the requirements of the coke pushing plan, the vehicle's idle time is deemed unreasonable, and the value of m needs to be reduced, and the coke pushing operation sequence needs to be re-arranged.

[0174] 4) Judgment on the rationality of the pressure stability of the gas collecting pipe, including the following:

[0175] As the value of m increases, the gas production of the carbonization chamber corresponding to each gas collecting pipe becomes more evenly distributed in each gas collecting pipe section, and the gas collecting pipe pressure control becomes easier and more stable. If the pressure of each gas collecting pipe section can be controlled within the set allowable range through control means, the conclusion of the reasonableness judgment of the gas collecting pipe pressure stability is qualified. If the pressure of each gas collecting pipe section cannot be controlled within the set allowable range through control means or the gas collecting pipe control effect is not ideal, the conclusion of the reasonableness judgment of the gas collecting pipe pressure stability is unqualified, and m needs to be further increased to re-program the coke pushing operation sequence.

[0176] 5) Judgment on the rationality of temperature uniformity in the straight-line flue of the coke oven, the contents of which are as follows:

[0177] The change in temperature uniformity before and after changing the coke pushing operation sequence is measured. If the temperature uniformity of the coke oven's straight flue reaches the temperature control uniformity index, the conclusion of the coke oven's straight flue temperature uniformity rationality judgment is qualified. If the temperature uniformity of the coke oven's straight flue temperature does not reach the temperature control uniformity index, the conclusion of the coke oven's straight flue temperature uniformity rationality judgment is unqualified. It is necessary to adjust the reasonable m value and re-compile the coke pushing operation sequence according to the law that the temperature uniformity of the coke oven's straight flue changes with the m value. Generally speaking, the coke oven's straight flue temperature uniformity is best when using a 2-1 sequence operation. The 2-1-nm sequence compilation method of this invention is an improvement based on the 2-1 sequence and has little impact on the temperature uniformity of the coke oven's straight flue. Combined with the process personnel's fire adjustment, it can basically meet the temperature control of the coke oven's straight flue. The verification requirements given here are to provide a quantitative judgment from a practical perspective. The judgment result serves as a basis for the rationality of the m value.

[0178] 6. Design Optimization Suggestions for Large Coke Ovens

[0179] By adjusting the appropriate values ​​of n and m, a reasonable coke pushing operation sequence can be developed. This can satisfy the coke pushing operation requirements while also taking into account the pressure control of the gas collecting pipe. Through repeated simulations and practices, the most suitable coke pushing operation sequence for large coke ovens can be obtained. At this point, the values ​​of n and m can be used as suggestions for optimizing the design of large coke ovens, thereby improving the design level of large coke ovens.

[0180] Increasing the value of m can reduce the design size of the gas collecting pipe, which can improve the uniformity of raw coal gas production in the direction of the gas collecting pipe, reduce the fluctuation of raw coal gas volume, and thus ensure the smooth discharge of raw coal gas.

[0181] The change in the value of n also affects the design dimensions of the gas collecting pipe. When the value of n increases, it can improve the uniformity of gas production in the direction of the gas collecting pipe and reduce the fluctuation of the raw gas volume, especially when a 2-1-nm series sequence is used, which can better ensure the smooth discharge of raw gas. The number of segments has many influencing factors. Increasing the number of segments will require more gas intake pipe designs and control valves. This should be comprehensively considered in the design of large coke ovens.

[0182] This invention provides an improved method for programming the coke pushing operation sequence in large coke ovens. The method provides a calculation formula for the improved coke pushing operation sequence. The program can calculate the improved coke pushing operation sequence under different conditions by using the given formula and combining it with the basic parameters of the coke oven. This method can be used in existing large coke ovens and can also be combined with the improved coke pushing operation sequence to optimize the design of large coke ovens. This integrates the optimized design, operation management, and control of large coke ovens, improving their design level and overall management and control capabilities.

[0183]

Example 2

[0184] In this embodiment, an improved method for compiling a coke pushing operation sequence for a large coke oven is the same as in Embodiment 1, but with the addition of a method for compiling and using the coke pushing operation sequence and a compilation example. (See [link to embodiment 1]). Figure 1 The flowchart includes: the 2-1-nm method for compiling the coking operation sequence, the pre-compilation of the coking plan, the judgment of the rationality of the coking time, the verification of the execution results of the coking plan, and the optimization design suggestions for large coke ovens. The verification of the execution results of the coking plan includes: the judgment of the rationality of the vehicle operation idle time, the judgment of the rationality of the gas collecting pipe pressure stability, and the judgment of the rationality of the temperature uniformity of the coke oven straight fire channel.

[0185] 1. An improved method for compiling and using the focus pushing operation sequence, as follows:

[0186] 1) Determine the input conditions by sequencing the strings:

[0187] n is the number of gas collecting pipe sections in the furnace group;

[0188] m represents the planned number of offset segments;

[0189] S: Number of furnaces in the furnace group;

[0190] 2) Calculate the number of furnaces A per string in each segment;

[0191] 2) Plan offset base K;

[0192] 3) Calculate the segment deviation number P;

[0193] 4) Offset array K[m];

[0194] 5) Sequencing of odd-numbered furnace plans;

[0195] 6) Even-numbered furnace sequence planning;

[0196] 7) Compilation of the entire furnace plan sequence.

[0197] 2. Large coke ovens have 2 x 60 holes. Each coke oven's gas collecting pipe is divided into 3 sections. The planned number of offset sections is 3. An example of the design is as follows:

[0198] S = 120 n = 6 m = 3

[0199] calculate:

[0200] A = S / n / 2 = 10

[0201] K = [A / m] = 3

[0202] P = AK·m = 1

[0203] K[1]=3,K[2]=4,K[3]=3

[0204]

[0205]

[0206]

[0207]

[0208]

[0209]

[0210]

[0211] The above embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the protection scope of the present invention is not limited to the above embodiments. Unless otherwise specified, the methods used in the above embodiments are conventional methods.

[0212] This invention, based on the traditional 2-1 coke oven pushing sequence and considering the segmented gas collecting pipe, presents an improved method for programming the pushing operation sequence with segmented offset. This solves the problem of poor pressure regulation performance in the gas collecting pipe of large coke ovens. The traditional 2-1 coke oven pushing sequence programming method is only one case of the 2-1-nm pushing operation sequence; the 2-1-nm pushing operation sequence has wider applicability, providing more operational options for the production management of large coke ovens. Furthermore, the 2-1-nm pushing operation sequence programming method makes the implementation of the improved pushing operation sequence program easier. The coke pushing operation sequence can be quickly generated by adjusting the input conditions. The 2-1-nm coke pushing operation sequence generation method combines the traditional 2-1 coke oven pushing with the design of a large coke oven gas collecting pipe. By changing the number of offset segments, various coke pushing operation sequences can be generated. Managers can select a reasonable number of offset segments based on actual operating results to generate a coke pushing operation sequence that meets the management and control requirements of a large coke oven. Based on the generated coke pushing operation sequence, and combined with the coke oven's turnaround time, operating time, and maintenance plan, a coke oven operation plan is generated. The principles for selecting the values ​​of n and m are given, allowing for reasonable selection based on the actual situation of the large coke oven, ensuring that the generated coke pushing operation sequence is optimal. This invention is more suitable for the actual production control needs of large coke ovens, improving the practicality of the method. It provides the rationality of the improved coke pushing operation sequence, and the sequence obtained after multiple rationality judgments is the most suitable for the actual production of large coke ovens, fully meeting the principles for compiling the coke pushing operation sequence. Through repeated simulations and practices, the most suitable coke pushing operation sequence for large coke ovens can be obtained. The n and m values ​​at this point can then be used as suggestions for optimizing the design of large coke ovens, thereby improving the design level of large coke ovens. The calculation method, through simple extensions, can be extended to improved coke pushing operation sequence methods based on 5-2 and 9-2 operation modes, demonstrating strong scalability.

Claims

1. An improved method for programming the coke pushing operation sequence in a large coke oven, characterized in that, The improved method is 2-1 coke oven pushing sequence + number of gas collecting pipe segments n + number of offset segments. The coke pushing operation sequence is compiled based on the 2-1 coke oven coke pushing sequence, combined with the number of gas collecting pipe sections n in the furnace group, and the number of offset sections in the plan is calculated. The changes led to the development of an improved coke oven operation sequence, which provides multiple operational options for the production management of large coke ovens. Based on the generated improved coke oven operation sequence, and in conjunction with the coke oven's turnaround time, operation time, and maintenance plan, a coke oven operation plan was developed. The mathematical formula for the improved coke oven operation sequence includes a general calculation formula and an improved calculation formula. 1) The general calculation formula is as follows: a) Mathematical formula for the number of furnaces per string in each segment: .....................................................① In formula ①, This indicates the number of furnaces in a coke oven group, which is the number of furnaces in a coke pushing plan, consisting of 1 or 2 coke ovens; When the number of single-string furnaces in each segment When the value is not an integer, Carrying the value up is equivalent to increasing the number of furnaces in the furnace group. This makes the number of single-string furnaces in each segment... The value is an integer, and the number of furnaces in the increased furnace group is... The plan was prepared in accordance with Calculation; The calculated coke pushing operation sequence may contain redundant furnace numbers. Remove the redundant furnace numbers from the calculation result. The calculation result can be verified as reasonable through the coke pushing operation sequence. b) Mathematical formula for the planned offset base: ② In formula ②, Indicates the planned offset base, which is... The calculation result is obtained by rounding down the integer part. c) Mathematical formula for segmented deviation: ③ In formula ③, P represents the segmented deviation number; d) Offset array: Among them, the number of planned offset segments The value range of is: 1~ , <= ; 2) The improved calculation formula is as follows: ④ ⑤ ⑥ Formula ④ represents the sequence of plans for odd-numbered furnaces, Formula ⑤ represents the sequence of plans for even-numbered furnaces, and Formula ⑥ represents the calculation of the offset variable. in: SCH == Odd-numbered furnace plan sequence number + Even-numbered furnace plan sequence number, calculated using the following formula: ⑦ In formula ⑦, SCH represents the sequence of the entire planned coking operation.

2. The improved method for programming the coke pushing operation sequence of a large coke oven according to claim 1, characterized in that, The application of the improved coke oven operation sequence programming is as follows: 1) Determine the input conditions by string sequencing: n: the number of gas collecting pipe sections in the furnace group; m: Number of offset segments to be planned; S: Number of furnaces in the furnace group; 2) Calculate the number of furnaces A per string in each segment; 3) Planned offset base K; 4) Calculate the segment deviation number P; 5) Offset array K[m]; 6) Sequential programming of odd-numbered furnace plans; 7) Even-numbered furnace sequence planning; 8) Compilation of the entire furnace plan sequence.

3. An improved method for programming the coke pushing operation sequence in a large coke oven according to claim 1, characterized in that, The verification of the rationality of the coking operation sequence includes the rationality of the coking time of adjacent furnace numbers, the rationality of the vehicle idle operation time, the rationality of the stability of the gas collecting pipe pressure, and the rationality of the temperature uniformity of the coke oven straight flue.

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