Method for finely adjusting height heating and space temperature of tamping coke oven

Abstract

The invention relates to the technical field of coking, in particular to a method for finely adjusting the height heating and space temperature of a tamping coke oven, which comprises the following steps of: establishing a formula for calculating the height of a coal cake by utilizing the shrinkage value of the coal cake, the effective height of a carbonization chamber and the heating level, arranging a fixed temperature measuring galvanic couple at the root of an ascending pipe, and accurately measuring the height of the coal cake by utilizing the average temperature of the ascending pipe; whether the furnace top space temperature is reasonable or not is evaluated, and the furnace top space temperature is optimized and stabilized at 810 DEG C + / -10 DEG C by adjusting the height of a coal cake; according to the invention, the high-direction heating uniformity of the coke oven is improved, the maturity of the coke is ensured, overfire and green coke of the coke are avoided, the yield of chemical products is improved, the distribution of graphite at the top of the furnace is favorably stabilized, and the method is suitable for tamping coking enterprises put into production and has the advantages of stabilizing the space temperature and improving the high-direction heating uniformity of the coke oven. And the method has important guiding significance in ensuring coke maturation and chemical product yield.

Description

Technical Field

[0001] The present invention relates to the technical field of coking, in particular to a method for finely adjusting high-direction heating and space temperature of a ramming coke oven. Background Art

[0002] During the coking process, the coke cake center temperature is a key indicator for evaluating coke maturity and serves as a crucial basis for assessing high-dimensional heating uniformity. When evaluating high-dimensional heating in rammed coke ovens, the high bulk density of rammed coke leads to poor accuracy and labor-intensive measurement of the coke cake center temperature. This results in infrequent measurements of the coke cake center temperature, making it difficult to assess the effectiveness of high-dimensional heating in rammed coke ovens by measuring the coke cake center temperature. The carbonization chamber space temperature is highly correlated with high-dimensional heating of the coke cake. When the space temperature is appropriate and evenly distributed, the heat generated by the gas combustion is more effectively distributed in the carbonization chamber, resulting in better high-dimensional heating uniformity. Furthermore, the carbonization chamber space temperature is a sensitive coke oven thermal parameter that influences gas quality, tar and crude benzene yields, coke quality, and graphite deposition in the furnace top space. It is also easier to measure than the coke cake center temperature. Therefore, fine-tuning and stabilizing the space temperature can achieve uniform high-dimensional heating in the coke oven.

[0003] Factors influencing the coke oven's internal temperature include the oven's heating level, heating gas type, air volume and air distribution uniformity, briquette height (coal loading height for top-loading), and briquette shrinkage. The heating level is determined during the coke oven design process and cannot be adjusted later. The gas type, air volume, and air distribution uniformity are difficult to adjust during production. The briquette height of top-loading coke ovens is related to the coal loading but difficult to adjust, while the briquette height of ram-charged coke ovens is easily adjustable within a certain range. Therefore, for ram-charged coke ovens that have already been constructed and put into operation, adjusting the ram-charged briquette height is an effective way to optimize the oven's internal temperature and high-level heating.

[0004] Patent CN202410436661.2, a method for detecting and analyzing the spatial temperature at the top of a coke oven, measures the temperature of the top of the carbonization chamber or combustion chamber and compares it with the standard temperature. At the same time, the coal line and the coke line are combined to judge the spatial temperature respectively. The patent describes a method for measuring spatial temperature and the factors related to temperature changes, but does not describe how to adjust it specifically or the adjustment range. In addition, there are fewer temperature measurement points, and the temperature measuring pipes need to be disassembled. In a high-temperature environment, there is a certain safety risk, and the professionalism of the operator is required to be high.

[0005] Therefore, a simple top space temperature measurement method is used to detect the changes in space temperature and to regulate the stability of the carbonization chamber space temperature through simple adjustment methods, which is of great significance to improving the high-direction heating uniformity of the coke oven, stabilizing the coke quality, and improving the comprehensive benefits of chemical products. Summary of the Invention

[0006] The present invention provides a method for fine-tuning the high-direction heating and space temperature of a ramming coke oven. The method uses the contraction value of coal cakes, the effective height of a carbonization chamber, and the heating level to establish a formula for calculating the coal cake height. A fixed temperature measuring couple is set at the root of a riser. The average temperature of the riser is used to evaluate whether the furnace top space temperature is reasonable. By adjusting the coal cake height, the furnace top space temperature is optimized and stabilized at 810°C±10°C, thereby improving the high-direction heating uniformity of the coke oven, ensuring the maturity of the coke, avoiding over-firing and coking of the coke, and increasing the yield of chemical products. The method is conducive to stabilizing the graphite distribution on the furnace top. The method is suitable for ramming coking enterprises that have been put into production, and has important guiding significance for stabilizing the space temperature, improving the high-direction heating uniformity of the coke oven, and ensuring the maturity of the coke and the yield of chemical products.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A method for fine-tuning high-direction heating and space temperature of a ramming coke oven, which fine-tunes high-direction heating and space temperature of the ramming coke oven by adjusting the height of ramming coal cakes, specifically comprising the following steps:

[0009] S1. Measure the distance H from the top of the rammed coal cake to the top of the carbonization chamber 煤线 , the distance from the top of the rammed coke cake to the top of the carbonization chamber is H 焦线 , rising tube space temperature T i ;

[0010] S2. Calculate the shrinkage value Δh of the rammed coal cake:

[0011] Δh=H 焦线 -H 煤线

[0012] S3. Calculate the height H of the tamped coal cake b :

[0013] H b =H t -H+Δh+δ

[0014] Among them, H t is the effective height of the carbonization chamber, mm;

[0015] H is the coke oven heating level, mm;

[0016] δ is a design constant, ranging from 100 to 300 mm;

[0017] S4. Calculate the average temperature T of the coke oven riser space 平 :

[0018] T 平 =(T1+T2+T3+T4+……T i ) / I

[0019] Among them, Ti is the temperature of the riser space of the i-th carbonization chamber, and I is the total number of carbonization chambers;

[0020] When T 平 <805℃, indicating that the temperature of the furnace top space is too low. According to the formula for tamping coal cake height, reduce the coal cake height by 1% to 8%;

[0021] When T 平 >825℃, indicating that the temperature of the furnace top space is too high. According to the formula for ramming coal cake height, increase the coal cake height by 1% to 8%.

[0022] Furthermore, the ramming coke oven uses a blended coal with a dry ash-free volatile matter content of ≥26%, a shrinkage X value of ≥40, and a dry bulk density of 0.90 t / m 3 ~1.15t / m 3 .

[0023] Furthermore, the gap between the rammed coal cake and the wall of the carbonization chamber is 15 mm to 30 mm.

[0024] Furthermore, the adjustment of the height of the rammed coal cakes needs to be repeated, and the temperature of the furnace top space must be kept stable at 810°C ± 10°C.

[0025] Furthermore, the riser space temperature detection couple is located at the root of the riser, and the direction in which the detection couple is inserted into the riser is 45° to the surface of the furnace top bricks, and the insertion depth is L = (r + h1) / sin45°, where r is the outer diameter of the riser, and h1 is the distance from the center of the couple sleeve inlet to the riser.

[0026] Furthermore, the temperature of the riser space is taken at the two-thirds coking time point.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1) A fixed thermocouple is used to measure the temperature of the riser space, avoiding frequent opening of the coal loading hole cover on the furnace top, which would cause heat loss, reducing operator difficulty and improving safety. The installation position does not affect coal loading and coke pushing.

[0029] 2) By adjusting the coal cake height, the furnace top space temperature is optimized and the high-direction heating uniformity of the coke oven is improved. The operation is simple and easy to implement.

[0030] 3) Finely adjusting the coal cake height and controlling the furnace top space temperature within the standard range is beneficial to stabilizing the coke quality, improving the comprehensive benefits of chemical products, and rationally distributing the use of heat; it is beneficial to the growth of graphite on the furnace top, avoiding excessive graphite growth that hinders coke pushing and insufficient graphite growth that causes gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the temperature measurement position of the riser space according to the present invention.

[0032] In the figure: 1. Riser; 2. Outer diameter of riser; 3. Distance from the center of the galvanic sleeve inlet to the riser; 4. Detection galvanic couple; 5. galvanic sleeve; 6. Carbonization chamber; 7. Furnace roof brick. DETAILED DESCRIPTION

[0033] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0034] The present invention provides a method for finely adjusting the high-direction heating and space temperature of a ramming coke oven, which finely adjusts the high-direction heating and space temperature of the ramming coke oven by adjusting the height of ramming coal cakes, and specifically comprises the following steps:

[0035] S1. Measure the distance H from the top of the rammed coal cake to the top of the carbonization chamber 6 煤线 The distance H from the top of the rammed coke cake to the top of the carbonization chamber 6 焦线 , rising tube space temperature T i ;

[0036] S2. Calculate the shrinkage value Δh of the rammed coal cake:

[0037] Δh=H 焦线 -H 煤线

[0038] S3. Calculate the height H of the tamped coal cake b :

[0039] H b =H t -H+Δh+δ

[0040] Among them, H t is the effective height of carbonization chamber 6, mm;

[0041] H is the coke oven heating level, mm;

[0042] δ is a design constant, ranging from 100 to 300 mm;

[0043] S4. Calculate the average temperature T of the coke oven riser space 平 :

[0044] T 平 =(T1+T2+T3+T4+……T i ) / I

[0045] Among them, T i is the temperature of the riser space of the i-th carbonization chamber 6, and I is the total number of carbonization chambers;

[0046] When T 平<805℃, indicating that the temperature of the furnace top space is too low. According to the formula for tamping coal cake height, reduce the coal cake height by 1% to 8%;

[0047] When T 平 >825℃, indicating that the temperature of the furnace top space is too high. According to the formula for ramming coal cake height, increase the coal cake height by 1% to 8%.

[0048] The dry ash-free volatile matter of the blended coal for ramming coke oven coking should be ≥26%, the X value should be ≥40, and the dry basis bulk density of the blended coal should be 0.90t / m 3 ~1.15t / m 3 .

[0049] By repeatedly adjusting the height of the rammed coal cakes, the temperature of the furnace top space is ensured to be stable at 810℃±10℃.

[0050] See Figure 1 The detection couple 4 for the spatial temperature of the riser 1 is located at the root of the riser. The direction in which the detection couple 4 is inserted into the riser 1 is 45° to the surface of the furnace roof brick 7, and the insertion depth is L = (r + h1) / sin45°. A galvanic sleeve 5 is provided outside the detection couple, where r is the outer diameter of the riser 2, and h1 is the distance 3 from the center of the galvanic sleeve inlet to the riser.

[0051] The temperature of the riser space is taken at the two-thirds coking time point.

[0052] The following examples are implemented under the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operating processes, but the scope of protection of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0053] The blended coal index is controlled to be 27% to 30% on a dry ash-free basis, the X value is 40 to 50, and the bulk density of the blended coal on a dry basis is 1.1 t / m 3 The gap between the rammed coal cake and the wall of the carbonization chamber 6 is 25 mm.

[0054] Measure the distance H from the top of the rammed coal cake to the top of the carbonization chamber 6, the distance H from the top of the rammed coke cake to the top of the carbonization chamber 6, and the temperature T of the riser space. i and the furnace top space temperature T, and use the formula to calculate the shrinkage value Δh of the rammed coal cake and the height H of the rammed coal cake respectively. b , the average temperature of the coke oven riser space T 平 .

[0055] According to the average temperature T of the coke oven riser space 平 Adjust the size of the tamping coal cakes to ensure that the space temperature is stable at 810℃±10℃ and improve the uniformity of high-direction heating.

[0056] Example 1:

[0057] The various indicators of the 4.3m ramming coke oven are shown in Table 1.

[0058] Table 1. Various indicators of 4.3m ramming coke oven

[0059] parameter Δh(mm) H(mm) <![CDATA[H t (mm)]]> δ(mm) <![CDATA[T 平 (℃)]]> T(℃) Numerical 80 700 4100 120 800 796

[0060] From Table 1, we can see that the coal cake height is H b =H t -H+Δh+δ,H b =4100-700+80+120=3600mm, T 平 <805℃, reduce the coal cake height by 1.5%, and the new coal cake height is 3600×(100-1.5)×100%=3546mm; after adjustment, the furnace top space temperature is measured to be 805℃ under the same conditions.

[0061] Example 2:

[0062] The various indicators of the 5.5m ramming coke oven are shown in Table 2.

[0063] Table 2. Various indicators of 5.5m ramming coke oven

[0064] parameter Δh(mm) H(mm) <![CDATA[H t (mm)]]> δ(mm) <![CDATA[T 平 (℃)]]> T(℃) Numerical 100 805 5370 185 830 824

[0065] From Table 2, we can see that the coal cake height is H b =H t -H+Δh+δ,H b =5370-805+100+185=4850mm, T 平 >825℃, increase the coal cake height by 2%, and the new coal cake height is 4850×(100+2)×100%=4947mm. After adjustment, the furnace top space temperature is measured to be 815℃ under the same conditions.

[0066] Example 3:

[0067] The various indicators of the 6.25m ramming coke oven are shown in Table 3.

[0068] Table 3. Various indicators of 6.25m ramming coke oven

[0069] parameter Δh(mm) H(mm) <![CDATA[H t (mm)]]> δ(mm) <![CDATA[T 平 (℃)]]> T(℃) Numerical 100 854 6000 154 843 831

[0070] From Table 3, we can see that the coal cake height is H b =H t -H+Δh+δ,H b =6000-854+100+154=5400mm, T 平>825℃, increase the coal cake height by 2.5%, and the new coal cake height is 5400×(100+2.5)×100%=5535mm. After adjustment, the furnace top space temperature is measured to be 810℃ under the same conditions.

Claims

1. A method for fine-tuning the high-direction heating and space temperature of a ramming coke oven, characterized in that: Fine-tuning the high-direction heating and space temperature of the ramming coke oven by adjusting the ramming coal cake height specifically includes the following steps: S1. Measure the distance H from the top of the rammed coal cake to the top of the carbonization chamber 煤线 , the distance from the top of the rammed coke cake to the top of the carbonization chamber is H 焦线 , rising tube space temperature T i ; S2. Calculate the shrinkage value Δh of the rammed coal cake: Δh=H 焦线 -H 煤线 S3. Calculate the height H of the tamped coal cake b : H b =H t -H+Δh+δ Among them, H t is the effective height of the carbonization chamber, mm; H is the coke oven heating level, mm; δ is a design constant, ranging from 100 to 300 mm; S4. Calculate the average temperature T of the coke oven riser space 平 : T 平 =(T1+T2+T3+T4+……T i ) / I Among them, T i is the temperature of the riser space of the i-th carbonization chamber, and I is the total number of carbonization chambers; When T 平 <805℃, indicating that the temperature of the furnace top space is too low. According to the formula for tamping coal cake height, reduce the coal cake height by 1% to 8%; When T 平 >825℃, indicating that the temperature of the furnace top space is too high. According to the formula for ramming coal cake height, increase the coal cake height by 1% to 8%.

2. The method for fine-tuning the high-direction heating and space temperature of a ramming coke oven according to claim 1, characterized in that: The ramming coke oven uses a dry ash-free volatile matter of ≥26% for coking, a shrinkage X value ≥40, and a dry bulk density of 0.90 t / m 3 ~1.15t / m 3 .

3. The method for fine-tuning the high-direction heating and space temperature of a ramming coke oven according to claim 1, characterized in that: The gap between the rammed coal cake and the wall of the carbonization chamber is 15mm to 30mm.

4. The method for fine-tuning the high-direction heating and space temperature of a ramming coke oven according to claim 1, characterized in that: The adjustment of the rammed coal cake height needs to be repeated, and the temperature of the furnace top space must be kept stable at 810℃±10℃.

5. The method for fine-tuning the high-direction heating and space temperature of a ramming coke oven according to claim 1, characterized in that: The riser space temperature detection couple is located at the root of the riser. The detection couple is inserted into the riser at an angle of 45° to the surface of the furnace roof bricks. The insertion depth is L = (r + h1) / sin 45°, where r is the outer diameter of the riser and h1 is the distance from the center of the couple sleeve inlet to the riser.

6. The method for fine-tuning high-direction heating and space temperature of a ramming coke oven according to claim 1, characterized in that: The temperature of the riser space is taken at the two-thirds coking time point.

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