Vertical flue temperature control method based on coke oven carbonization chamber temperature

Abstract

The invention discloses a vertical flue temperature control method based on the temperature of a coke oven carbonization chamber. The method comprises the following steps: S1, setting and completing combined temperature measurement of a coke oven carbonization chamber and a vertical flue; determining data collection is completed based on determination; s2, according to the collected measurement data, performing linear regression to obtain a relation expression between the coke cake center temperature and the vertical flue temperature; and S3, according to the center temperature of the coke cake, real-time regulation and control of the temperature of the vertical flame path are completed through the regressed relation expression. According to the vertical flue temperature control method based on the temperature of the coke oven carbonization chamber, vertical flue temperature control based on the temperature of the coke oven carbonization chamber is established based on combined measurement of the temperature of the coke oven carbonization chamber and the temperature of the vertical flue, the temperature of the vertical flue of the coke oven can be ensured to be within a conventional required range, the temperature fluctuation range is small, the coke oven gas consumption is low, and the coking energy consumption is low.

Description

Technical Field

[0001] The invention belongs to the field of temperature control of a carbonization chamber and a combustion chamber in a coke oven production process and the thermal technology of a coke oven, and in particular relates to a vertical fire channel temperature control method based on the temperature of a coke oven carbonization chamber. Background Art

[0002] In recent years, my country's annual output of molten iron has exceeded 700 million tons. The processes for producing molten iron include blast furnace ironmaking, molten reduction ironmaking, direct iron reduction, etc. Blast furnace ironmaking is the mainstream ironmaking process in the world's steel industry, and this situation will not change fundamentally in the next 20-30 years. The main raw materials for producing molten iron are coke and iron ore. Coke acts as a heating agent, carbon skeleton, reducing agent, carburizing agent, etc. in the blast furnace that produces molten iron. The quality of coke directly affects the production of molten iron. Coke is mainly produced by pyrolysis of coal under high temperature and air-isolated conditions. The quality of coke is closely related to the industrial analysis and elemental analysis of raw coal, the proportion of various coals, the production operation system of coke ovens and the size of coke ovens. The source and quality of raw coal are the determining factors for the quality of coke production. Coal, as a primary energy source, is the conventional energy with the largest reserves and the widest distribution in the world. China is a country that mainly relies on coal as an energy source. With the continuous mining of coal mines and the continuous increase in production and consumption year by year, coal resources will become less and less, especially coking coal resources. Coal scientists in many countries are conducting research on using low-metamorphic coal to obtain qualified coke for blast furnaces through coal blending. The source of coal directly restricts the production of coke and the stability of coke quality. The production and operation system of the coke oven is a key factor affecting the quality of coke. Different operation systems will cause different changes in the coal raw materials in the coke oven, such as the interaction between coals, the changes in the formation of colloids by heating, the fusion of colloids into semi-coke, the differences in the gases produced by coal pyrolysis, the removal of harmful elements in coal, etc.

[0003] The pyrolysis process conditions of coal include the pyrolysis temperature, pyrolysis pressure, residence time, etc. Temperature is the most important process condition for coal pyrolysis. Different pyrolysis temperatures result in different depths of pyrolysis reactions, which not only affect the reactions that generate primary decomposition products, but also the secondary reactions that generate volatiles. In the absence of secondary reactions, the yield of a certain volatile component increases monotonically with increasing temperature, that is, it increases with the increase in the decomposition reactions that produce the component. When there are a large number of secondary reactions, the temperature increases, the rate of the secondary reactions increases, resulting in cracking and repolymerization of tar, a decrease in yield, and an increase in the yield of semi-coke and gas. Similarly, the composition of pyrolysis tar and semi-coke is also affected by temperature. Generally speaking, the hydrogen and oxygen content in high-temperature semi-coke is lower; the tar produced at low temperatures has lower density and viscosity, and is mainly composed of alicyclic compounds and a small amount of aliphatic olefins, alkanes, and a small amount of benzene aromatic compounds, while the proportion of tar aromatics is very high at high temperatures. At the same time, in order to produce more coke, many companies will produce coke ovens at full capacity or even overload them, which will lead to the phenomenon of difficult coke pushing and high coke pushing current during the production process, which in turn affects the normal production. The temperature control of the coke oven is often an important solution to control the high current and difficult coke pushing process during the coke pushing process.

[0004] The existing coke ovens often experience vertical fire channel temperatures exceeding standard requirements, large temperature fluctuations, high energy consumption, immature coke or over-fire, difficulty in pushing coke and high current in pushing coke, which seriously affect the normal production of the coke ovens, the product quality of coke, the gas consumption of the entire coke oven, and the inflated energy consumption of the coke ovens, especially affecting the output of coke production and thus affecting the normal production of blast furnaces.

[0005] The invention application with application number: CN2007100622673 discloses "a coke oven combustion chamber temperature measurement system and its measurement method". The measurement system is provided with an operation station to implement control operations on the mobile temperature measuring device, collect temperature measurement data of the mobile temperature measuring device, complete data record statistics, report generation and network transmission of data; the mobile temperature measuring device implements temperature measurement of all vertical fire channels; the control station implements processing and printing of the transmitted information and performs corresponding application management. The measurement method is to control the entire process of the mobile temperature measuring device, including movement, positioning, cover lifting, temperature measurement and cover closing, through wireless data transmission and control.

[0006] The invention application with application number: CN2006100466558 discloses "a coke oven temperature continuous measurement device and method", which is provided with a temperature measuring hole at the bottom of the coke oven chamber, a temperature measuring target is placed on the top of the temperature measuring hole, a temperature measuring probe is installed at the bottom of the temperature measuring hole, and a ventilation and dust prevention device is provided between the temperature measuring target and the temperature measuring probe. The measurement method using this device is that the temperature measuring probe collects the infrared light signal emitted by the temperature measuring target, converts it into an electrical signal through a photoelectric converter and outputs it to a signal processor, and the signal processor with a single-chip microcomputer as the core calculates the received signal to obtain the temperature value.

[0007] The invention application with application number: CN20041001298056 discloses "a method for automatic temperature measurement of coke oven and its temperature measurement system". Its temperature measurement system includes a circular temperature measurement track arranged on the inner or outer side of the coal loading car track on the coke oven surface, an automatic temperature measurement device with an optical probe, a brush-type communication head and a host computer. Its temperature measurement method is to let the automatic temperature measurement device walk on the temperature measurement track, and the temperature measurement probe on the temperature measurement device scans and measures the temperature in the furnace through the standard vertical fire channel temperature measurement hole located in the temperature measurement track. The automatic temperature measurement device transmits the collected temperature data to the host computer on the ground through the brush-type communication head arranged at a point above the temperature measurement track through the wired communication line. The host computer obtains the temperature of each standard vertical fire channel by analyzing and calculating the sampling curve data and controls the coke oven heating system. Summary of the invention

[0008] The object of the present invention is to provide a vertical flue temperature control scheme which can ensure that the vertical flue temperature of a coke oven is within the conventional required range, has a small temperature fluctuation range, consumes less coke oven gas, and has low coking energy consumption.

[0009] In order to achieve the above technical objectives, the present invention provides a vertical flue temperature control method based on the temperature of the coke oven carbonization chamber, and the technical scheme thereof is as follows:

[0010] A method for controlling the temperature of a vertical flue based on the temperature of a coke oven carbonization chamber comprises the following steps:

[0011] S1: Set up and complete the joint temperature measurement of the coke oven carbonization chamber and the vertical fire channel; and complete the measurement data collection based on the measurement;

[0012] S2: Based on the collected measurement data, linear regression is used to express the relationship between the coke cake center temperature and the vertical flue temperature;

[0013] S3: Based on the center temperature of the coke cake, the real-time regulation of the temperature of the opposing fire channel is completed through the regression relationship expression.

[0014] Further,

[0015] The specific steps of "setting up and completing the joint temperature measurement of the coke oven carbonization chamber and the vertical fire channel" are as follows:

[0016] S11: After the coal loading operation is completed, the coal loading hole is sealed and covered by a sealing cover with an opening, a steel pipe of a set length and a set diameter is inserted into the coke oven at the opening, and thermocouples of different depths are inserted into the steel pipe; each thermocouple is electrically connected to each temperature measuring instrument, and the gap between the steel pipe and the opening is sealed with high-temperature refractory mud;

[0017] S12: A transparent vertical fireway cover is provided on the top of the vertical fireway adjacent to the coal loading hole, and an infrared thermal imager with adjustable angle and focal length is provided on the transparent vertical fireway cover;

[0018] S13: By adjusting the angle and focal length of the infrared thermal imager, temperature measurements corresponding to different depths of the thermocouple are formed;

[0019] S14: From the end of coal loading to the maturity of the coke cake, temperature measurements are performed periodically to complete the determination of the center temperature of the coke cake and the corresponding vertical fire channel temperature at the same depth at different times.

[0020] Further,

[0021] The coke cake center temperature at a certain moment used for linear regression is characterized by the mean of the values ​​measured at that moment;

[0022] Accordingly, the vertical flue temperature at a certain moment used for linear regression is characterized by the mean of the values ​​measured at that moment.

[0023] Further,

[0024] Steps S1, S2 and S3 are performed on coal with the same ash content and volatile distribution.

[0025] Further,

[0026] The ash content of the blended coal is 10%-12%;

[0027] The volatile matter of the blended coal is 28%-30%.

[0028] The present invention provides a vertical fire channel temperature control method based on the temperature of the coke oven carbonization chamber. By jointly measuring the temperature of the combustion chamber and the carbonization chamber, the temperature of the vertical fire channel is controlled in real time through the center temperature of the coke cake. The method effectively associates the center temperature of the coke cake in the coke oven carbonization chamber and the typical vertical fire channel temperature in the charcoal burning chamber on the basis of effectively measuring the two, thereby realizing real-time control of the vertical fire channel temperature of the coke oven through the center temperature of the coke cake. The maturity and quality of coke in the coking production process can be effectively guaranteed, and the continuous production of the coke oven can be effectively guaranteed, thereby reducing the gas consumption in the coking production process, reducing the coking energy consumption in the coking production process, and reducing the occurrence of difficult coke pushing and large coke pushing current, which is beneficial to increasing the coke output, reducing the production cost, and improving the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the control steps of the present invention;

[0030] Figure 2 It is a schematic diagram of the combined temperature measurement steps of the coke oven carbonization chamber and the vertical fire channel in the present invention;

[0031] Figure 3 It is a schematic diagram of the combined temperature measurement structure of the coke oven carbonization chamber and the vertical fire channel in the present invention;

[0032] Figure 4 It is a linear fitting schematic diagram of the vertical flue temperature and the coke cake center temperature in Example 1 of the present invention;

[0033] Figure 5 It is a schematic diagram of the linear fitting of the vertical flue temperature and the coke cake center temperature in Example 2 of the present invention.

[0034] In the figure,

[0035] 1- Coal loading hole;

[0036] 2- Thermocouple;

[0037] 3- Standing fire road;

[0038] 4- Thermometer;

[0039] 5- Computer;

[0040] 6- Infrared thermal imager. DETAILED DESCRIPTION

[0041] Below, a vertical flue temperature control method based on the temperature of the coke oven carbonization chamber of the present invention is further described in detail according to the accompanying drawings and specific implementation methods of the specification.

[0042] In order to form a clear understanding of this technical solution, the working principle and process of this technical solution are explained as follows:

[0043] like Figure 1 A vertical flue temperature control method based on the temperature of the coke oven carbonization chamber is shown, comprising the following steps:

[0044] S1: Set up and complete the joint temperature measurement of the coke oven carbonization chamber and the vertical fire channel; and complete the measurement data collection based on the measurement;

[0045] S2: Based on the collected measurement data, linear regression is used to express the relationship between the coke cake center temperature and the vertical flue temperature;

[0046] S3: Based on the center temperature of the coke cake, the real-time regulation of the temperature of the opposing fire channel is completed through the regression relationship expression.

[0047] Among them, "Combined temperature measurement of coke oven carbonization chamber and vertical fire channel", such as Figure 2 As shown, the following steps are included:

[0048] S11: After the coal loading operation is completed, the coal loading hole is sealed and covered by a sealing cover with an opening, a steel pipe of a set length and a set diameter is inserted into the coke oven at the opening, and thermocouples of different depths are inserted into the steel pipe; each thermocouple is electrically connected to each temperature measuring instrument, and the gap between the steel pipe and the opening is sealed with high-temperature refractory mud;

[0049] S12: A transparent vertical fireway cover is provided on the top of the vertical fireway adjacent to the coal loading hole, and an infrared thermal imager with adjustable angle and focal length is provided on the transparent vertical fireway cover;

[0050] S13: By adjusting the angle and focal length of the infrared thermal imager, temperature measurements corresponding to different depths of the thermocouple are formed;

[0051] S14: Periodically perform temperature measurement to complete the determination of the coke cake center temperature and the corresponding vertical fire channel temperature at the same depth at different times.

[0052] The specific process mentioned above is:

[0053] The ash content of the controlled blended coal is: A d =10-12%, controlling the volatilization of blended coal: VM d =28-30%,; the understanding of the following description can be combined with Figure 3After the coal is loaded into the coke oven from the coal loading hole 1, a special lid is put on. There is a 35-40mm round hole in the center of the lid. After the lid is put on, a steel pipe is inserted from the center of the round hole. The steel pipe is one of 2520 stainless steel pipe or 310s stainless steel pipe. The steel pipe is 6.5 meters long and 25mm in diameter. The insertion end is closed. After the steel pipe is inserted into the furnace for 6 meters, the gap between the steel pipe and the coal loading hole cover is sealed with high-temperature refractory mud to prevent the release of gas during the coal pyrolysis process. After the sealing is completed, a nickel-chromium-nickel-silicon armored thermocouple 2 is inserted into the tube. The diameter is 6mm. One is inserted into the tube for 6 meters, one is inserted into the tube for 4.5 meters, and one is inserted into the tube for 3 meters. After the thermocouple 2 is inserted, it is connected to the temperature meter 4 by a compensation wire. The thermocouple 2 is inserted into different positions in the tube, so that the temperature of different positions in the vertical direction of the center of the coke cake can be measured, and the high-direction temperature distribution of the center of the coke cake can be known. At the same time, an angle-adjustable high-temperature infrared thermal imager 6 is installed on the top of the two vertical fireways 3 adjacent to the coal loading hole. The thermal imager has an adjustable angle and an adjustable focal length, so that the temperature at 6 meters, 4.5 meters and 3 meters below the top can be measured, so that the measured temperature can be consistent with the temperature position of the carbonization chamber. A transparent high-temperature resistant vertical fireway cover (with a silicon dioxide content of more than 99%) is installed on the top of the vertical fireway to ensure that the gas in the vertical fireway will not leak, thereby causing safety problems, and at the same time ensure that the high-temperature infrared thermal imager can measure the temperature in the vertical fireway. The high-temperature infrared thermal imager 6 is installed at a height of 20-25cm directly above the vertical fireway cover. The high-temperature infrared thermal imager 6 is connected to a computer 5, and the computer 5 controls the adjustment of the angle and focal length to record the measured temperature. According to the above method, a coke oven selects two carbonization chambers and four vertical fireways adjacent to it. When the temperature starts to rise after the coal is loaded, the temperature is measured using a thermometer 4 until the coke cake is mature, and the temperature measurement is stopped. The temperature measuring instrument 4 is connected to the computer 5 so that the temperature data can be output in real time. By measuring the temperature in this way, the temperature distribution in the vertical direction of the center of the coke cake and the relative position of the vertical fire channel and the temperature change relationship between the two can be guided. The temperature of the i period (i = 1, 3, 5, 7, ...) of the center of the coke cake at 3 meters, 4.5 meters and 6 meters is set to T c i3 ,T c i4.5 ,T c i6 The temperatures at 3 meters, 4.5 meters and 6 meters in the center of the fire channel during the i period (i=1,3,5,7.......) are T l i3 ,T l i4.5 ,T l i6 , calculate the average value of the coke cake center temperature and the vertical fire channel center temperature in the same period i to obtain T c i and Tl i , numerically fit the average values ​​of different time periods i to obtain T c i and T l i The correlation relationship formula is as follows: when i=9, T c Substitute 9 into the relationship formula to obtain the new T l拟 9, thus guiding the control of the vertical fire channel temperature to T l拟 9. Ensure that the coke reaches maturity within the specified time of the coking process.

[0054] Example

[0055] Example 1

[0056] The production plant blended coal (A d =10%, VM d =30%) After the coal is loaded into the coke oven from the coal loading hole 1, a special cover is put on. There is a 35mm round hole in the center of the cover. A 2520 stainless steel pipe with a length of 6.5 meters and a diameter of 25mm is inserted from the center of the round hole. The insertion end is closed. After the steel pipe is inserted into the furnace for 6 meters, the gap between the steel pipe and the coal loading hole cover is sealed with high-temperature refractory mud to prevent the release of gas during the coal pyrolysis process. After the sealing is completed, a nickel-chromium-nickel-silicon armor type thermocouple 2 with a diameter of 6mm is inserted into the tube. One is inserted into the tube for 6 meters, one is inserted into the tube for 4.5 meters, and one is inserted into the tube for 3 meters. After the thermocouple 2 is inserted, it is connected to the temperature measuring instrument 4 by a compensation wire. At the same time, an angle-adjustable Fourier high-temperature infrared thermal imager 6 is installed on the top of the two vertical fireways 3 adjacent to the coal loading hole. The angle of the thermal imager is adjustable and the focal length is adjustable so as to ensure that the temperature at the position of 6 meters, 4.5 meters and 3 meters below the top can be measured, so as to ensure that the measured temperature is consistent with the temperature position of the carbonization chamber. The top of the vertical fire channel is equipped with a transparent, high-temperature resistant vertical fire channel cover (with a silicon dioxide content of 99%), which ensures that the gas in the vertical fire channel will not leak, thereby causing safety problems. At the same time, it also ensures that the high-temperature infrared thermal imager can measure the temperature in the vertical fire channel. The high-temperature infrared thermal imager 6 is installed at a height of 20 cm directly above the vertical fire channel cover. The high-temperature infrared thermal imager 6 is connected to the computer 5, and the computer 5 controls the adjustment of the angle and focal length to record the measured temperature. According to the above method, two carbonization chambers and four vertical fire channels adjacent to them are selected for a coke oven. When the temperature begins to rise after the coal is loaded, the temperature is measured using the thermometer 4 until the coke cake is mature, and then the temperature measurement is stopped. The thermometer 4 is connected to the computer 5, so that the temperature data can be output in real time. The specific temperature measurement data is shown in Table 1 below, and the temperature measurement data is averaged. See Figure 4 , T can be obtained by data fitting c i =0.0122T l i+1208.4, so the vertical fire channel control temperature can be obtained as 1210.9, which can ensure the coke maturity within the specified time.

[0057] Table 1 Average values ​​of thermocouple temperature measurements over time

[0058] Time / h 1 3 5 7 9 11 13 15 17 19 21 Coke cake center temperature 3m / ℃ 100 102 105 115 120 142 225 470 710 892 1025 The temperature of the coke center is 4.5m / ℃ 100 104 108 120 125 185 295 495 705 910 1030 Coke cake center temperature 6m / ℃ 100 106 112 130 165 270 420 590 740 980 1030 Vertical fire channel temperature 3m / ℃ 1222 1208 1196 1196 1205 1224 1223 1207 1203 1220 1226 Vertical fire channel temperature 4.5m / ℃ 1224 1209 1196 1197 1207 1226 1224 1208 1205 1221 1225 Vertical fire channel temperature 6m / ℃ 1227 1208 1199 1198 1210 1227 1225 1210 1205 1224 1230

[0059] Example 2

[0060] The production plant blended coal (A d =12%, VM d =28%) After the coal is loaded into the coke oven from the coal loading hole 1, a special cover is put on. There is a 40mm round hole in the center of the cover. A 310s stainless steel pipe with a length of 6.5 meters and a diameter of 25mm is inserted from the center of the round hole. The insertion end is closed. After the steel pipe is inserted into the furnace for 6 meters, the gap between the steel pipe and the coal loading hole cover is sealed with high-temperature refractory mud to prevent the release of gas during the coal pyrolysis process. After the sealing is completed, a nickel-chromium-nickel-silicon armor type thermocouple 2 with a diameter of 6mm is inserted into the tube, one is inserted into the tube for 6 meters, one is inserted into the tube for 4.5 meters, and one is inserted into the tube for 3 meters. After the thermocouple 2 is inserted, it is connected to the temperature measuring instrument 4 by a compensation wire. At the same time, an angle-adjustable MIKRON high-temperature infrared thermal imager 6 is installed on the top of the two vertical fireways 3 adjacent to the coal loading hole. The thermal imager has an adjustable angle and an adjustable focal length, so as to ensure that the temperature at the position of 6 meters, 4.5 meters and 3 meters below the top can be measured, so as to ensure that the measured temperature is consistent with the temperature position of the carbonization chamber. The top of the vertical fire channel is equipped with a transparent, high-temperature resistant vertical fire channel cover (silicon dioxide content 99.6%), which ensures that the gas in the vertical fire channel will not leak, thus causing safety problems, and also ensures that the high-temperature infrared thermal imager can measure the temperature in the vertical fire channel. The high-temperature infrared thermal imager 6 is installed at a height of 25 cm directly above the vertical fire channel cover. The high-temperature infrared thermal imager 6 is connected to the computer 5, and the computer 5 controls the adjustment of the angle and focal length to record the measured temperature. According to the above method, two carbonization chambers and four adjacent vertical fire channels are selected for a coke oven. When the temperature begins to rise after the coal is loaded, the temperature is measured using the thermometer 4 until the coke cake is mature, and then the temperature measurement is stopped. The thermometer 4 is connected to the computer 5, so that the temperature data can be output in real time. The specific temperature measurement data are shown in Table 2 below, and the temperature measurement data is averaged. See Figure 5 , T can be obtained by data fitting c i =0.0119T l i +1207.8, so the vertical fire channel control temperature can be obtained as 1211.5, which can ensure the coke maturity within the specified time.

[0061] Table 2 Average values ​​of thermocouple temperature measurements over time

[0062] Time / h 1 3 5 7 9 11 13 15 17 19 21 Coke cake center temperature 3m / ℃ 100 105 106 120 185 350 570 730 880 960 995 The temperature of the coke center is 4.5m / ℃ 100 105 108 110 120 205 480 720 1000 1020 1022 Coke cake center temperature 6m / ℃ 100 120 150 290 510 640 760 805 980 1015 1023 Vertical fire channel temperature 3m / ℃ 1221 1208 1194 1195 1206 1223 1223 1208 1204 1219 1224 Vertical fire channel temperature 4.5m / ℃ 1225 1210 1195 1198 1208 1225 1225 1210 1203 1222 1227 Vertical fire channel temperature 6m / ℃ 1226 1212 1198 1201 1213 1226 1228 1213 1208 1224 1232

Claims

1. A vertical flue temperature control method based on the temperature of the coke oven carbonization chamber, Features: The steps include: S1: Set up and complete the joint temperature measurement of the coke oven carbonization chamber and the vertical fire channel; and complete the measurement data collection based on the measurement; S2: Based on the collected measurement data, linear regression is used to express the relationship between the coke cake center temperature and the vertical flue temperature; S3: Based on the center temperature of the coke cake, the real-time regulation of the temperature of the opposing fire channel is completed through the regression relationship expression.

2. A vertical flue temperature control method based on the temperature of the coke oven carbonization chamber according to claim 1, Features: The specific steps of "setting up and completing the joint temperature measurement of the coke oven carbonization chamber and the vertical fire channel" are as follows: S11: After the coal loading operation is completed, the coal loading hole is sealed and covered by a sealing cover with an opening, a steel pipe of a set length and a set diameter is inserted into the coke oven at the opening, and thermocouples of different depths are inserted into the steel pipe; each thermocouple is electrically connected to each temperature measuring instrument, and the gap between the steel pipe and the opening is sealed with high-temperature refractory mud; S12: A transparent vertical fireway cover is provided on the top of the vertical fireway adjacent to the coal loading hole, and an infrared thermal imager with adjustable angle and focal length is provided on the transparent vertical fireway cover; S13: By adjusting the angle and focal length of the infrared thermal imager, temperature measurements corresponding to different depths of the thermocouple are formed; S14: From the end of coal loading to the maturity of the coke cake, temperature measurements are performed periodically to complete the determination of the center temperature of the coke cake and the corresponding vertical fire channel temperature at the same depth at different times.

3. A vertical flue temperature control method based on the temperature of the coke oven carbonization chamber according to claim 2, Features: The coke cake center temperature at a certain moment used for linear regression is characterized by the mean of the values ​​measured at that moment; Accordingly, the vertical flue temperature at a certain moment used for linear regression is characterized by the mean of the values ​​measured at that moment.

4. A vertical flue temperature control method based on the temperature of the coke oven carbonization chamber according to claim 1, Features: Steps S1, S2 and S3 are performed on coal with the same ash content and volatile distribution.

5. A method for controlling the vertical flue temperature based on the temperature of the coke oven carbonization chamber according to claim 4, Features: The ash content of the blended coal is 10%-12%; The volatile matter of the blended coal is 28%-30%.

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