Single-heat type coke oven horizontal row temperature adjusting method

Abstract

The present application relates to a kind of single hot type coke oven horizontal row temperature adjusting method, comprising:1) the horizontal row temperature of combustion chamber is measured and draws horizontal row temperature curve, with machine coke side standard temperature difference as slope, draws standard line in horizontal row temperature curve;Except four vertical flues of machine side oven head and coke side oven head, when the temperature of other vertical flues deviates standard line 20 ℃ or more, its temperature is adjusted;2) excess air coefficient when needing to adjust vertical flue is in the state of rising exchange across hole;3) according to the deviation of vertical flue temperature and standard line, and excess air coefficient, adjust the gas supply amount of vertical flue and / or the opening of corresponding louver structure, realize the adjustment of coke oven horizontal row temperature.The present application can maximize reduce coking heat consumption under the premise of ensuring the uniformity of coke oven length direction heating, reduce coke oven nitrogen oxide generation, and simple and convenient operation, and operation environment is friendly.

Description

Technical Field

[0001] This invention relates to the field of coke oven production technology, and in particular to a method for regulating the horizontal row temperature of a single-heat coke oven. Background Technology

[0002] The transverse row temperature of a coke oven is an important indicator of the uniformity of heating along the length of the coke oven. An unreasonable transverse row temperature indicates the presence of local high-temperature or low-temperature points along the length of the coke oven, which will lead to uneven coke cake maturation, waste of heating gas, increased coking heat consumption, and increased formation of nitrogen oxides in the coke oven combustion chamber. Alternatively, it may indicate the presence of low-temperature points along the length of the coke oven. In order to ensure safe coke oven production, reduce coking heat consumption, and reduce nitrogen oxide formation, unreasonable transverse row temperatures must be adjusted in a timely manner.

[0003] Chinese utility model patent CN201581046U discloses a "Coke Oven Horizontal Blower Temperature Regulation and Control System for Coke Oven Gas Heating." The background section of the specification states that "Currently, in metallurgical industrial production, coke ovens are heated using coke oven gas. The regulation of the coke oven horizontal blower temperature generally adopts a theoretical orifice plate arrangement sequence. This theoretical orifice plate arrangement sequence is suitable for furnace temperature regulation when the heating gas purification effect is good, the pipeline resistance is low, and the flow is unobstructed. However, in actual production, due to the poor purification quality of the gas, the heating system..." After prolonged heating, corrosive gases in the gas corrode the orifice plates, rendering the regularly arranged horizontal orifice plates ineffective. Furthermore, when replacing the orifice plates to manage the horizontal furnace temperature, prolonged temperature control may be necessary while the coking time remains unchanged, potentially affecting coke quality. In practice, bamboo sticks or wires are often used to adjust the gas flow, which is effective, but the fixed diameter of the sticks or wires results in coarse adjustments. This utility model patent describes a coke oven horizontal temperature regulation and control system comprising a lower spray pipe, a heating horizontal pipe, and an adjusting orifice plate installed in the gas passage of the coke oven's horizontal row, along with adjusting taps that mate with the orifices on the orifice plate. Its purpose is to control the gas flow, simplifying and facilitating the control method, reducing furnace temperature processing time, and minimizing temperature fluctuations caused by furnace shutdown.

[0004] Chinese patent application CN115851283A discloses a "louvered regulating structure for adjusting the airflow in a coke oven regenerator," comprising a louvered structure disposed between the regenerator and the small flue. The regenerator is a segmented regenerator composed of several unit regenerators, each separated by a small partition wall. The louvered structure is correspondingly arranged to each unit regenerator and is located on the airflow channel between the segmented regenerator and the small flue. The louvered structure consists of an adjusting rod, blades, a transmission rod, a frame, a rotating shaft, a blade frame, and adjusting holes. Several blades are present, with both ends hinged to the frame via the rotating shaft and the middle hinged to the transmission rod via a blade fixing bracket. The transmission rod has adjusting holes, and the adjusting rod is hinged to the transmission rod through the adjusting holes. The frame is fixed to the partition wall between the regenerator and the small flue, thus separating the regenerator and the small flue. The single-heat coke oven horizontal row temperature regulation method of this invention utilizes the aforementioned louvered regulating structure to achieve horizontal row temperature regulation in a single-heat coke oven. Summary of the Invention

[0005] This invention provides a method for regulating the horizontal row temperature of a single-heat coke oven, which can minimize the heat consumption of coking and reduce the generation of nitrogen oxides in the coke oven while ensuring the uniformity of heating along the length of the coke oven. It is also simple and convenient to operate and has a friendly operating environment.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A method for regulating the horizontal row temperature of a single-heat coke oven, wherein the single-heat coke oven comprises a small flue, a regenerator, an inclined flue, a combustion chamber, and a carbonization chamber. The vertical flue of the combustion chamber adopts a segmented heating method. The regenerators are grouped in pairs, with one regenerator in the same group connected to the bottom of the vertical flue and the other regenerator connected to the airflow channel within the partition wall of the vertical flue. The regenerators are longitudinally segmented regenerators, with each segment connected to a pair of vertical flues. Each segment is equipped with a louvered structure between itself and the small flue. The segment connected to the bottom of the vertical flue corresponds to louvered structure one, and the segment connected to the partition wall of the vertical flue corresponds to louvered structure two. The method for regulating the horizontal row temperature of the single-heat coke oven includes the following steps:

[0008] 1) Measure the horizontal temperature of the combustion chamber and plot the horizontal temperature curve. Plot a standard line in the horizontal temperature curve with the standard temperature difference between the coke and the machine side as the slope. Except for the four vertical flues of the machine side furnace head and the coke side furnace head, when the temperature of other vertical flues deviates from the standard line by more than 20°C, adjust their temperature.

[0009] 2) Measure the excess air coefficient at the cross-hole when the vertical flue that needs to be adjusted is in the rising exchange state;

[0010] 3) Adjust the gas supply to the vertical flue and / or the opening of the corresponding louver structure according to the deviation of the temperature of the vertical flue from the standard line and the excess air coefficient to achieve the adjustment of the horizontal flue temperature of the coke oven.

[0011] Furthermore, the specific process for adjusting the horizontal temperature of the coke oven is as follows:

[0012] (1) When the temperature of a certain vertical fire channel exceeds the standard line by 20℃~40℃ and the excess air coefficient is >1.25, reduce the opening of the louver structure one and louver structure two corresponding to that vertical fire channel.

[0013] (2) When the temperature of a certain vertical fire channel is 20℃~40℃ higher than the standard line, and the excess air coefficient is 1.15~1.25, reduce the opening of the louver structure one corresponding to the vertical fire channel and increase the opening of the louver structure two corresponding to the vertical fire channel.

[0014] (3) When the temperature of a certain vertical flue exceeds the standard line by 20℃ to 40℃ and the excess air coefficient is <1.15, reduce the amount of gas supplied to that vertical flue.

[0015] (4) When the temperature of a certain vertical flue exceeds the standard line by more than 40°C and the excess air coefficient is greater than 1.25, reduce the gas supply in the vertical flue and at the same time reduce the opening of the louver structure one and louver structure two corresponding to the vertical flue.

[0016] (5) When the temperature of a certain vertical flue exceeds the standard value by more than 40°C and the excess air coefficient is ≤1.25, reduce the amount of gas supplied to that vertical flue.

[0017] (6) When the temperature of a certain vertical fire channel is 20℃~40℃ lower than the standard line and the excess air coefficient is ≥1.25, increase the opening of the louver structure one corresponding to the vertical fire channel and decrease the opening of the louver structure two corresponding to the vertical fire channel.

[0018] (7) When the temperature of a certain vertical fire channel is 20℃~40℃ lower than the standard line and the excess air coefficient is <1.15, increase the opening of the louver structure one corresponding to that vertical fire channel.

[0019] (8) When the temperature of a certain vertical flue is more than 40°C below the standard line and the excess air coefficient is greater than 1.25, increase the amount of gas supplied to that vertical flue.

[0020] (9) When the temperature of a certain vertical flue is more than 40°C below the standard line and the excess air coefficient is ≤1.25, increase the gas supply in the vertical flue and increase the opening of the corresponding louver structure one and louver structure two.

[0021] Furthermore, the opening of the louver structure is adjusted in multiple steps, with each adjustment not exceeding 5°.

[0022] Furthermore, after each adjustment, wait for several reversing cycles, and then remeasure the horizontal row temperature to determine whether further adjustment is needed.

[0023] Furthermore, after each adjustment, wait for 5 reversal cycles, and then remeasure the horizontal row temperature to determine if further adjustment is needed.

[0024] Furthermore, after each adjustment, the temperature of the vertical flue before adjustment, the temperature of the vertical flue after adjustment, the excess air coefficient before adjustment, and the change in the opening of the louver structure are recorded. Based on a period of operation, a database is established, and the optimal adjustment method is found through the computer system as a reference for subsequent adjustments, so as to achieve rapid and accurate adjustment of the horizontal exhaust temperature of the single-heat coke oven.

[0025] Furthermore, during each adjustment, the opening degree of both louver structure one and louver structure two is adjusted by 1° to 5°.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1) When the temperature of the vertical flue is too high, the gas supply should be reduced first; when the temperature of the vertical flue is too low, the air supply should be adjusted first. In this way, while ensuring the uniformity of heating along the length of the coke oven, the coking heat consumption and the generation of nitrogen oxides in the coke oven can be reduced to the maximum extent.

[0028] 2) Determine the adjustment method based on the temperature of the flue and the excess air coefficient to reduce operational complexity and improve adjustment efficiency;

[0029] 3) The air supply can be adjusted by changing the opening of the louver structure. The operation is simple and convenient, and the operating environment is friendly.

[0030] 4) Based on multiple adjustments, experience can be summarized to find patterns, thereby developing operating methods that can guide the temperature adjustment of the entire furnace, thus improving work efficiency;

[0031] 5) No system pressure needs to be measured during the adjustment process, saving workload and time. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the single-heat coke oven described in this invention.

[0033] Figure 2 yes Figure 1 The CC view in the middle.

[0034] Figure 3 This is a schematic diagram of the louver adjustment structure described in this invention.

[0035] Figure 4This is the horizontal temperature curve before adjustment in this embodiment of the invention.

[0036] Figure 5 This is the adjusted horizontal temperature curve in this embodiment of the invention.

[0037] In the diagram: 1. Small flue; 2 / 3. Compartmentalized regenerator; 4. Small partition wall; 5. Louvered structure; 6. Inclined duct; 7. Airflow passage within the partition wall of the vertical flue; 8. Combustion chamber; 9. Carbonization chamber. Detailed Implementation

[0038] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0039] The present invention provides a method for regulating the horizontal exhaust temperature of a single-heat coke oven, such as... Figure 1 , Figure 2 As shown, the single-heat coke oven consists of a small flue 1, a regenerator chamber, an inclined flue 6, a combustion chamber 8, and a carbonization chamber 9. The vertical flue of the combustion chamber 8 adopts a segmented heating method. The regenerator chambers are grouped in pairs. One regenerator chamber in the same group is connected to the bottom of the vertical flue, and the other regenerator chamber is connected to the airflow channel 7 inside the partition wall of the vertical flue. The regenerator chambers are longitudinally divided into compartments, separated by small partition walls 4. Each compartment of the regenerator chamber is connected to a pair of vertical flues. Each compartment of the regenerator chamber is equipped with a louvered structure 5 in the airflow channel between the small flue 1 (e.g., ...). Figure 3 (As shown); for ease of description, the louvered structure corresponding to the compartmented regenerator connected to the bottom of the vertical flue is referred to as louvered structure one, and the louvered structure corresponding to the compartmented regenerator connected to the partition wall of the vertical flue is referred to as louvered structure two; the single-heat coke oven horizontal row temperature regulation method includes the following steps:

[0040] 1) Measure the horizontal temperature of the combustion chamber and plot the horizontal temperature curve. Plot a standard line in the horizontal temperature curve with the standard temperature difference between the coke and the machine side as the slope. Except for the four vertical flues of the machine side furnace head and the coke side furnace head, when the temperature of other vertical flues deviates from the standard line by more than 20°C, adjust their temperature.

[0041] 2) Measure the excess air coefficient at the cross-hole when the vertical flue that needs to be adjusted is in the rising exchange state;

[0042] 3) Based on the deviation between the temperature of the vertical flue and the standard line, as well as the excess air coefficient, adjust the gas supply of the vertical flue and / or the opening of the corresponding louver structure to achieve the regulation of the horizontal exhaust temperature of the coke oven.

[0043] Furthermore, the specific process for adjusting the horizontal temperature of the coke oven is as follows:

[0044] (1) When the temperature of a certain vertical fire channel exceeds the standard line by 20℃~40℃ and the excess air coefficient is >1.25, reduce the opening of the louver structure one and louver structure two corresponding to that vertical fire channel.

[0045] (2) When the temperature of a certain vertical fire channel is 20℃~40℃ higher than the standard line, and the excess air coefficient is 1.15~1.25, reduce the opening of the louver structure one corresponding to the vertical fire channel and increase the opening of the louver structure two corresponding to the vertical fire channel.

[0046] (3) When the temperature of a certain vertical flue exceeds the standard line by 20℃ to 40℃ and the excess air coefficient is <1.15, reduce the amount of gas supplied to that vertical flue.

[0047] (4) When the temperature of a certain vertical flue exceeds the standard line by more than 40°C and the excess air coefficient is greater than 1.25, reduce the gas supply in the vertical flue and at the same time reduce the opening of the louver structure one and louver structure two corresponding to the vertical flue.

[0048] (5) When the temperature of a certain vertical flue exceeds the standard value by more than 40°C and the excess air coefficient is ≤1.25, reduce the amount of gas supplied to that vertical flue.

[0049] (6) When the temperature of a certain vertical fire channel is 20℃~40℃ lower than the standard line and the excess air coefficient is ≥1.25, increase the opening of the louver structure one corresponding to the vertical fire channel and decrease the opening of the louver structure two corresponding to the vertical fire channel.

[0050] (7) When the temperature of a certain vertical fire channel is 20℃~40℃ lower than the standard line and the excess air coefficient is <1.15, increase the opening of the louver structure one corresponding to that vertical fire channel.

[0051] (8) When the temperature of a certain vertical flue is more than 40°C below the standard line and the excess air coefficient is greater than 1.25, increase the amount of gas supplied to that vertical flue.

[0052] (9) When the temperature of a certain vertical flue is more than 40°C below the standard line and the excess air coefficient is ≤1.25, increase the gas supply in the vertical flue and increase the opening of the corresponding louver structure one and louver structure two.

[0053] Furthermore, the opening of the louver structure is adjusted in multiple steps, with each adjustment not exceeding 5°.

[0054] Furthermore, after each adjustment, wait for several reversing cycles, and then remeasure the horizontal row temperature to determine whether further adjustment is needed.

[0055] Furthermore, after each adjustment, wait for 5 reversal cycles, and then remeasure the horizontal row temperature to determine if further adjustment is needed.

[0056] Furthermore, after each adjustment, the temperature of the vertical flue before adjustment, the temperature of the vertical flue after adjustment, the excess air coefficient before adjustment, and the change in the opening of the louver structure are recorded. Based on a period of operation, a database is established, and the optimal adjustment method is found through the computer system as a reference for subsequent adjustments, so as to achieve rapid and accurate adjustment of the horizontal exhaust temperature of the single-heat coke oven.

[0057] Furthermore, during each adjustment, the opening degree of both louver structure one and louver structure two is adjusted by 1° to 5°.

[0058] The following embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments.

[0059]

Example

[0060] At a coke oven production site, the transverse temperature curve of combustion chamber #2 is as follows: Figure 4 As shown in the figure, the temperature of the No. 30 flue is 27°C lower than the standard line, while the temperature of the No. 10 flue is 45°C higher than the standard line. The temperature of both flues needs to be adjusted.

[0061] The excess air coefficient at the cross-hole of the No. 10 vertical flue in the rising exchange state was measured, and the measured value was 1.3; the excess air coefficient at the cross-hole of the No. 30 vertical flue in the rising exchange state was measured, and the measured value was 1.1.

[0062] The adjustment process for the No. 10 vertical flue is as follows: reduce the gas supply in the No. 10 vertical flue, and at the same time reduce the opening of the louver structure one of the corresponding compartment heat storage chamber 2 connected to the bottom of the No. 10 vertical flue by 5°, and reduce the opening of the louver structure two of the corresponding compartment heat storage chamber 3 connected to the partition wall of the vertical flue by 5°.

[0063] The adjustment process for the No. 30 vertical flue is as follows: increase the opening of the louver structure 1 of the corresponding compartment heat storage chamber 2, which is connected to the bottom of the No. 30 vertical flue, by 3°.

[0064] After five reversing cycles of the coke oven, the transverse temperature was measured again, and the adjusted transverse curve is as follows. Figure 5 As shown, the temperature of all fire channels is within 20°C above or below the standard line.

[0065] Complete one horizontal temperature adjustment process, and record the temperature of the vertical flue before and after adjustment, the excess air coefficient before adjustment, and the change in the opening of the louver structure.

[0066] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for regulating the horizontal row temperature of a single-heat coke oven, characterized in that, The single-heat coke oven consists of a small flue, a regenerator, an inclined flue, a combustion chamber, and a carbonization chamber. The vertical flue of the combustion chamber adopts a segmented heating method. The regenerators are grouped in pairs. One regenerator in the same group is connected to the bottom of the vertical flue, and the other regenerator is connected to the airflow channel inside the partition wall of the vertical flue. The regenerator is a longitudinally segmented regenerator, with each segment connected to a pair of vertical flues. Each segment is equipped with a louvered structure between itself and the small flue. Specifically, the segmented regenerator connected to the bottom of the vertical flue corresponds to louvered structure one, and the segmented regenerator connected to the partition wall of the vertical flue corresponds to louvered structure two. The horizontal temperature regulation method of the single-heat coke oven includes the following steps: 1) Measure the horizontal temperature of the combustion chamber and plot the horizontal temperature curve. Plot a standard line in the horizontal temperature curve with the standard temperature difference between the coke and the machine side as the slope. Except for the four vertical flues of the machine side furnace head and the coke side furnace head, when the temperature of other vertical flues deviates from the standard line by more than 20°C, adjust their temperature. 2) Measure the excess air coefficient at the cross-hole when the vertical flue that needs to be adjusted is in the rising exchange state; 3) Adjust the gas supply to the vertical flue and / or the opening of the corresponding louver structure according to the deviation of the temperature of the vertical flue from the standard line and the excess air coefficient to achieve the adjustment of the horizontal flue temperature of the coke oven. The specific adjustments to the horizontal exhaust temperature of the coke oven are as follows: (1) When the temperature of a certain vertical fire channel exceeds the standard line by 20℃~40℃ and the excess air coefficient is >1.25, reduce the opening of the louver structure one and louver structure two corresponding to that vertical fire channel. (2) When the temperature of a certain vertical fire channel is 20℃~40℃ higher than the standard line, and the excess air coefficient is 1.15~1.25, reduce the opening of the louver structure one corresponding to the vertical fire channel and increase the opening of the louver structure two corresponding to the vertical fire channel. (3) When the temperature of a certain vertical flue exceeds the standard line by 20℃ to 40℃ and the excess air coefficient is <1.15, reduce the amount of gas supplied to that vertical flue. (4) When the temperature of a certain vertical flue exceeds the standard line by more than 40°C and the excess air coefficient is greater than 1.25, reduce the gas supply in the vertical flue and at the same time reduce the opening of the louver structure one and louver structure two corresponding to the vertical flue. (5) When the temperature of a certain vertical flue exceeds the standard value by more than 40°C and the excess air coefficient is ≤1.25, reduce the amount of gas supplied to that vertical flue. (6) When the temperature of a certain vertical fire channel is 20℃~40℃ lower than the standard line and the excess air coefficient is ≥1.25, increase the opening of the louver structure one corresponding to the vertical fire channel and decrease the opening of the louver structure two corresponding to the vertical fire channel. (7) When the temperature of a certain vertical fire channel is 20℃~40℃ lower than the standard line and the excess air coefficient is <1.15, increase the opening of the louver structure one corresponding to that vertical fire channel. (8) When the temperature of a certain vertical flue is more than 40°C below the standard line and the excess air coefficient is greater than 1.25, increase the amount of gas supplied to that vertical flue. (9) When the temperature of a certain vertical flue is more than 40°C below the standard line and the excess air coefficient is ≤1.25, increase the gas supply in the vertical flue and increase the opening of the corresponding louver structure one and louver structure two.

2. The method for regulating the horizontal row temperature of a single-heat coke oven according to claim 1, characterized in that, The opening of the louver structure is adjusted in multiple steps, with each adjustment not exceeding 5°.

3. The method for regulating the horizontal row temperature of a single-heat coke oven according to claim 1, characterized in that, After each adjustment, wait for several reversing cycles, then remeasure the horizontal row temperature to determine if further adjustment is needed.

4. The method for regulating the horizontal row temperature of a single-heat coke oven according to claim 2, characterized in that, After each adjustment, wait for 5 reversal cycles, then remeasure the horizontal row temperature to determine if further adjustment is needed.

5. The method for regulating the horizontal row temperature of a single-heat coke oven according to claim 1, characterized in that, After each adjustment, the temperature of the vertical flue before adjustment, the temperature of the vertical flue after adjustment, the excess air coefficient before adjustment, and the change in the opening of the louver structure are recorded. Based on the operation for a period of time, a database is established, and the optimal adjustment method is found through the computer system as a reference for subsequent adjustments, so as to achieve rapid and accurate adjustment of the horizontal exhaust temperature of the single-heat coke oven.

6. The method for regulating the horizontal row temperature of a single-heat coke oven according to claim 1, characterized in that, Each time adjustments are made, the opening degree of both louver structure one and louver structure two is adjusted by 1° to 5°.

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