TWI774585B - Method and equipment of evaluating coal gas oven pressure - Google Patents

Abstract

A method of evaluating a coal gas oven pressure is described. In this method, a coal to be evaluated is placed in a coking chamber of a movable wall coke oven, in which the movable wall coke oven includes a fixed heating wall and a movable heating wall which are opposite to each other. A coking process is performed on the coal to be evaluated. The performing of the coking process includes measuring and recording a temperature change of an oven center of the moveable wall coke oven, a temperature change of an oven wall, and a pressure change of an oven wall of the moveable heating wall. A coal gas oven pressure status of the coal to be evaluated is evaluated based on the temperature change of the oven center, the temperature change of the oven wall, and the pressure change of the oven wall. In the coking middle stage of the coking process, when the pressure change of the oven wall rapidly increases to a highest oven wall pressure and then decreases while an oven center temperature of the movable wall coke oven is from 600°C to 900°C, the coal gas oven pressure status of the coal to be evaluated is evaluated as that the coal to be evaluated has a coal gas oven pressure.

Description

Evaluation method and equipment of gas furnace pressure

The present disclosure relates to a coking technology, and in particular, to a method and equipment for evaluating gas furnace pressure.

When a coke oven produces coke, one or more individual coals are first mixed and then added to the coke oven chamber, and then the mixed coal is heated at a high temperature of about 1200°C by using a heating wall. After the mixed coal is heated, it will undergo reactions such as dehydration, cracking, and polymerization. For example, when the temperature of the blended coal rises to about 350°C, volatile substances are released, and the blended metallurgical coal shrinks accordingly. When the temperature continues to rise, the mixed metallurgical coal will soften, melt, and expand. When the temperature rises to about 550°C, the mixed metallurgical coal will solidify, and the solidified material at this time is called semi-coke. When the temperature rises to about 900°C, the coking of the mixed coal is completed. Usually, after 2.5 hours of coke setting time, the coke pushing operation can be carried out to produce coke.

In foreign countries, the heating wall of the coke oven was damaged due to the use of dangerous coal, so the dangerous coal cannot be used in the coke oven. Spain currently uses two methods to assess hazardous coal. One of these methods is the experimental coke oven using a moving wall, and the other method is the Koppers-INCAR test. The first method is to measure the furnace wall pressure. When the furnace wall pressure is greater than 10kPa, the tested coal is judged to be dangerous coal. The second method still needs to be confirmed by the first method.

The main reason for the high pressure of the furnace wall during the coking process is that the gap between the coke cake and the furnace wall is small, and the generated gas cannot be effectively discharged. Therefore, after the coking is completed, the gap between the coke cake and the furnace wall is small. Therefore, when pushing coke, the coke cake may hit the furnace wall, which will cause the coke pushing current to rise, making it difficult to push coke and plug the furnace. At this time, the coke needs to be removed by manual coke raking. What's more, the heating wall of the coke oven may be damaged, and the production needs to be interrupted for maintenance.

Therefore, one of the objectives of the present disclosure is to provide a method and equipment for evaluating the gas furnace pressure, which can effectively evaluate the gas furnace pressure status of single coal or mixed coal, and can exclude the use of dangerous coal, thereby avoiding the use of coke ovens in coking. damaged in the process.

Another object of the present disclosure is to provide a gas furnace pressure evaluation method and equipment, which can measure the low gas furnace pressure, and thus can be applied to the evaluation of coal pressing in the low gas furnace.

According to the above purpose of the present disclosure, a method for evaluating gas furnace pressure is proposed. In this method, the coal to be evaluated is placed in the coking chamber of a moving wall coke oven, wherein the moving wall coke oven comprises a fixed heating wall and a moving heating wall opposite each other. The coal to be evaluated is subjected to a coking process. During the coking process, it includes measuring and recording the temperature change of the furnace center of the moving wall coke oven, the temperature change of the furnace wall, and the pressure change of the furnace wall of the moving heating wall. According to the changes of furnace center temperature, furnace wall temperature, and furnace wall pressure, the gas furnace pressure of the coal to be evaluated is evaluated. When in the middle of coking process of coking process, and the furnace wall pressure change rapidly rises to the highest furnace wall pressure and then decreases during the furnace center temperature of the moving wall coke oven from 600°C to 900°C, the gas furnace of the coal to be evaluated shall be evaluated. The pressure condition is gas furnace pressure.

According to an embodiment of the present disclosure, the above-mentioned coal to be evaluated includes single coal or mixed coal.

According to an embodiment of the present disclosure, before placing the coal to be evaluated into the coking chamber of the moving wall coke oven, the method for evaluating the gas furnace pressure further comprises raising the temperature of the furnace wall of the moving wall coke oven from room temperature to 850°C, And measure and record the temperature change of the empty furnace center of the moving wall coke oven, the temperature change of the empty furnace wall, and the pressure change of the empty furnace wall of the moving heating wall.

According to an embodiment of the present disclosure, the method for evaluating the gas furnace pressure further includes obtaining observation results based on the change of the center temperature of the empty furnace, the temperature change of the empty furnace wall, and the change of the pressure of the empty furnace wall for evaluating the gas of the coal to be evaluated. Reference is made to furnace pressure conditions, where observations include the furnace wall pressure of the moving heating wall, which is related to temperature effects and has a delayed effect.

According to an embodiment of the present disclosure, the above-mentioned measuring the furnace wall pressure of the mobile heating wall includes using a furnace wall pressure monitoring device. This furnace wall pressure monitoring device includes a load cell and a force transmission rod. The load cell is designed on the fixed wall. The force transmission rod has a first end and a second end opposite to each other, the first end is pressed against the moving heating wall, and the second end is pressed against the load meter.

According to the above purpose of the present disclosure, another apparatus for evaluating gas furnace pressure is proposed, which is suitable for evaluating the gas furnace pressure status of coal to be evaluated in a moving wall coke oven. The moving wall coke oven includes a coking chamber, and fixed heating walls and moving heating walls located on opposite sides of the coking chamber. The gas furnace pressure evaluation equipment includes a first thermometer, a second thermometer, a load gauge, and a power transmission rod. The first thermometer is arranged in the coking chamber and is configured to measure the oven center temperature of the moving wall coke oven. The second thermometer is designed on the fixed heating wall or the moving heating wall, and is configured to measure the temperature of the furnace wall of the moving wall coke oven. The load cell is designed on the fixed wall and configured to measure the furnace wall pressure of the mobile heating wall. The force transmission rod has a first end and a second end opposite to each other, the first end is pressed against the moving heating wall, and the second end is pressed against the load meter.

According to an embodiment of the present disclosure, the above-mentioned force transmission rod includes a stainless steel rod, and the length of the stainless steel rod can be adjusted.

According to an embodiment of the present disclosure, the apparatus for evaluating the gas furnace pressure further includes a recorder. The recorder is connected to the signals of the first thermometer, the second thermometer, and the load meter, and is configured to receive and record a plurality of furnace center temperature values, a plurality of furnace temperature values respectively transmitted from the first thermometer, the second thermometer, and the load meter. Wall temperature value, and several furnace wall pressure values for moving heated walls.

According to an embodiment of the present disclosure, the apparatus for evaluating the gas furnace pressure further includes a computer. The computer is connected with the recorder signal to receive and process the furnace center temperature value, the furnace wall temperature value, and the furnace wall pressure value of the moving heating wall transmitted from the recorder.

According to an embodiment of the present disclosure, the above-mentioned computer is further configured to draw the furnace center temperature change curve and the furnace wall temperature change curve of the coal to be evaluated according to the furnace center temperature value, the furnace wall temperature value, and the furnace wall pressure value of the moving heating wall , and the furnace wall pressure change curve, and according to the furnace center temperature change curve, the furnace wall temperature change curve, and the furnace wall pressure change curve to evaluate the gas furnace pressure status of the coal to be evaluated.

Please refer to FIG. 1 and FIG. 2 , wherein FIG. 1 is a flowchart illustrating a method for evaluating gas furnace pressure according to an embodiment of the present disclosure, and FIG. 2 illustrates an evaluation to be evaluated according to an embodiment of the present disclosure. Schematic diagram of the device at the state of coal gas furnace pressure. In this embodiment, when evaluating the gas furnace pressure status of the coal to be evaluated in the moving wall coke oven 200, the gas furnace pressure evaluation device 300 shown in FIG. 2 can be used. The moving wall coke oven 200 mainly includes a coking chamber 210 , and fixed heating walls 220 and moving heating walls 230 located on opposite sides of the coking chamber 210 . The coking chamber 210 is provided with a feeding port 212 , and the coal to be evaluated can be fed into the coking chamber 210 from the feeding port 212 . The fixed heating wall 220 does not move, while the mobile heating wall 230 is movable relative to the fixed heating wall 220 .

The gas furnace pressure evaluation device 300 may mainly include a first thermometer 310 , a second thermometer 320 , and a furnace wall pressure monitoring device 330 . The first thermometer 310 is installed in the coking chamber 210 . For example, when the coal to be evaluated is added into the coking chamber 210 , the first thermometer 310 can be inserted in the center of the furnace of the coking chamber 210 first. Therefore, the first thermometer 310 can be used to measure the furnace center temperature of the moving wall coke oven 200 . The second thermometer 320 is configured to measure the furnace wall temperature of the moving wall coke oven 200 . The second thermometer 320 can be disposed on the fixed heating wall 220 or the movable heating wall 230, for example.

The furnace wall pressure monitoring device 330 can be used to measure the furnace wall pressure of the mobile heating wall 230 . In some examples, the furnace wall pressure monitoring device 330 includes a load gauge 332 and a force transmission rod 334 . The load gauge 332 can be used to measure the wall pressure of the moving heating wall 230 . For example, the load gauge 332 is arranged on the fixed wall 400 outside the movable heating wall 230 . The force transmission rod 334 is arranged between the load gauge 332 and the mobile heating wall 230 . The force transmission rod 334 has a first end 334a and a second end 334b opposite to each other, wherein the first end 334a abuts on the moving heating wall 230, and the second end 334b abuts on the load gauge 332, that is, the second end 334b and the load gauge 332 Contact. In some examples, the force transmission rod 334 is substantially perpendicular to the moving heated wall 230 and the load gauge 332 . The furnace wall pressure of the moving heating wall 230 can be measured through the force transmission rod 334 and the load gauge 332 . The force transmission rod 334 may be a steel rod, such as a stainless steel rod. In addition, the length of the force transmission rod 334 can be adjusted according to actual application requirements.

In some examples, the gas furnace pressure evaluation apparatus 300 may optionally include a recorder 340 . The recorder 340 can be signal-connected with the first thermometer 310 , the second thermometer 320 , and the load gauge 332 through wired transmission or wireless transmission. For example, in the example shown in FIG. 2 , the recorder 340 is signal-connected to the first thermometer 310 , the second thermometer 320 , and the load gauge 332 through connecting wires 342 , 344 , and 346 , respectively. The recorder 340 can receive a number of furnace center temperature values, a number of furnace wall temperature values, and a number of furnace wall pressures of the moving heating wall 230 respectively transmitted from the first thermometer 310 , the two thermometers 320 , and the load meter 332 . value and record it for storage.

In some examples, the gas furnace pressure evaluation apparatus 300 may optionally include a computer 350 . The computer 350 can be connected with the signal of the recorder 340 through wired transmission or wireless transmission. For example, in the example shown in FIG. 2 , the computer 350 is connected with the signal of the recorder 340 through the connecting line 352 . In other examples, the computer 350 can be connected with the signal of the recorder 340 through a wireless transmission technology such as Bluetooth and the Internet. The computer 350 can receive the furnace center temperature value, the furnace wall temperature value, and the furnace wall pressure value of the movable heating wall 230 transmitted from the recorder 340 .

The computer 350 can process the received furnace center temperature value, furnace wall temperature value, and furnace wall pressure value of the movable heating wall 230, and convert them into suitable presentation information. For example, the computer 350 can draw the furnace center temperature change curve, the furnace wall temperature change curve, and the furnace wall pressure of the coal to be evaluated according to the furnace center temperature values, the furnace wall temperature values, and the furnace wall pressure values of the moving heating wall 230 . Curve. In some examples, the computer 350 may further evaluate the gas furnace pressure of the coal to be evaluated according to the furnace center temperature change curve, the furnace wall temperature change curve, and the furnace wall pressure change curve.

Referring to FIGS. 1 and 2 again, when evaluating the gas furnace pressure of the coal to be evaluated, step 100 may be performed first to put the coal to be evaluated into the coking chamber 210 of the moving wall coke oven 200 . The coals to be evaluated may comprise individual coals or blended coals. In some optional examples, before the coal to be evaluated is put into the coking chamber 210, the furnace wall temperature of the moving wall coke oven 200 can be raised from room temperature to 850°C in an empty furnace state. During this period, the first thermometer 310 is used to measure and record the change of the center temperature of the empty furnace of the moving wall coke oven 200, the second thermometer 320 is used to measure and record the temperature change of the empty furnace wall of the moving wall coke oven 200, and the load meter is used to measure and record the temperature change of the empty furnace wall of the moving wall coke oven 200 332 measures and records the change in the wall pressure of the empty furnace of the moving heating wall 230. In such an example, the observation results can be obtained based on the change of the center temperature of the empty furnace, the temperature change of the empty furnace wall, and the change of the pressure of the empty furnace wall, and the observation results can be used as the evaluation of the gas furnace pressure of the coal to be evaluated. time reference.

For example, please refer to FIG. 3 first, which is a graph showing the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall when the moving wall coke oven is empty. The furnace wall pressure of the moving-wall coke oven 200 is measured with the load meter 332 , and the measured furnace wall pressure is recorded with the recorder 340 . According to the recorded furnace wall pressure, the inventor found that the distribution difference of furnace wall pressure is not obvious. The inventor also found that when the furnace temperature of the empty furnace was kept at 850°C, the reading of the load gauge 332 fluctuated within about 100kg, so it was determined that the furnace wall pressure was caused by the temperature effect. In a test example, when the furnace wall temperature of the moving wall coke oven 200 is raised from room temperature to 850°C, the setting condition is 0.5 hours to raise the furnace wall temperature from room temperature to the furnace wall temperature of 200°C, and then at 200°C. The temperature was maintained for 1 hour, and then the temperature was set to 850°C for 26 hours. It can be seen from Figure 3 that the furnace wall pressure increases by about 12kPa, and when the furnace wall temperature increases to 850°C, the furnace wall pressure does not immediately increase to 12kPa, indicating that the furnace wall pressure has a delayed effect. Thus, observations may include that the wall pressure of the moving heating wall 230 is related to temperature effects, and that the wall pressure has a delayed effect.

Next, step 110 may be performed, and the coal to be evaluated in the coking chamber 210 is heated to perform the coking process. During the coking process, the first thermometer 310 , the second thermometer 320 , and the load gauge 332 can be used to measure the furnace center temperature, furnace wall temperature, and furnace wall pressure of the moving wall coke oven 200 , respectively. Next, the recorder 340 can be used to record the measured furnace center temperature and change of the moving wall coke oven 200 , the furnace wall temperature and change, and the furnace wall pressure and change of the moving heating wall 230 .

Then, step 120 may be performed to evaluate the gas furnace pressure condition of the coal to be evaluated according to the measured and recorded changes in furnace center temperature, furnace wall temperature changes, and furnace wall pressure changes. The gas furnace pressure status of the coal to be assessed may include whether the coal to be assessed has gas furnace pressure, whether the gas furnace pressure of the coal to be assessed is higher than the coke oven pressure, etc. In some examples, the computer 350 may be used to process the furnace center temperature changes, furnace wall temperature changes, and furnace wall pressure changes recorded by the recorder 340, and based on the furnace center temperature changes, furnace wall temperature changes, and furnace wall pressure changes To evaluate the gas furnace pressure of the coal to be evaluated.

In some demonstration examples, when in the middle stage of the coking process, and the furnace wall pressure change rapidly increases to the maximum furnace wall pressure and then decreases during the period when the central temperature of the moving wall coke oven is 600°C to 900°C, the computer 350 or the assessor can assess the gas furnace pressure status of the coal to be assessed as having gas furnace pressure.

Several embodiments are listed below to describe the technical content of the gas furnace pressure evaluation method of the present disclosure in more detail, but they are not intended to limit the present disclosure.

Please refer to FIG. 4 , which shows the coking process of 3633K coal alone and the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall after coking. Figure 4 shows that during the coking process, the furnace wall temperature increased from 850 °C to 1069 °C, and the furnace door was opened to release coke after the power was cut off. It can be seen from Figure 4 that the furnace center temperature is 998°C when the coke is released. When coking begins, the furnace wall pressure drops to -2kPa, and then increases gradually, reaching a maximum of 4kPa at the time of coking. In Figure 4, it can be seen that the temperature of the furnace center rapidly dropped to room temperature at the beginning, which is presumed to be caused by the addition of room temperature coal to the thermometer in the center of the cooling furnace. Subsequently, the furnace center temperature was maintained at about 100°C for several hours, presumably due to the evaporation of moisture in the coal.

After completing the coking process, push all the coke to the quenching train, close the furnace door tightly, then turn on the power to start the coke oven cooling program, and set the temperature to 850 ° C for 6 hours. The right side of Figure 4 records the changes of the furnace wall temperature, furnace center temperature, and furnace wall pressure when the furnace is empty. Figure 4 shows that when the furnace door is closed, the furnace wall pressure increases to a maximum of 5.4kPa and then decreases. When the furnace wall temperature dropped to 850°C for several hours, the furnace pressure dropped to about 0 to 1 kPa. This phenomenon again shows that the furnace wall pressure is affected by the furnace wall temperature, with a delayed effect. After observation, the inventor found that there was a gap between the coke cake and the furnace wall, indicating that in the late stage of coking, the furnace wall pressure was gradually increased due to the influence of the furnace wall temperature.

Please refer to FIG. 5 , which shows the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall in the coking process of 3645P single coal. Figure 5 shows that during the coking process, the furnace wall temperature increased from 850 °C to 1081 °C, then the power was cut off, and the furnace door was opened again to produce coke. It can be seen from Figure 5 that the central temperature of the coke oven is 1026°C. When coking starts, the furnace wall pressure drops to -2kPa, and then gradually increases, reaching a maximum of 4.5kPa when coking is released.

Please refer to FIG. 6 , which shows the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall in the coking process of 3653S coal. Figure 6 shows that the furnace wall temperature in the coking process increased from 850 °C to 1081 °C, then the power was cut off and the furnace door was opened to produce coke. The furnace center temperature was 1023°C when the coke was released. When coking started, the furnace wall pressure was 0 kPa and then gradually increased. In the middle stage of coking, when the furnace center temperature is 600 ℃ to 900 ℃, the furnace wall pressure rises rapidly to a maximum of 6.8 kPa, then decreases to 4.4 kPa, and then slowly increases until the coke is released to 6.9 kPa. Therefore, 3653S single coal has gas furnace pressure measured in the middle stage of coking, but the measured gas furnace pressure is lower than the coke oven pressure.

Please refer to FIG. 7 , which shows the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall in the coking process of 3647G coal. Figure 7 shows that the furnace wall temperature in the coking process rises from 850°C to 1099°C, and then the power is turned off and the furnace door is opened to produce coke. The furnace center temperature is 1040℃ when the coke is released. At the beginning of coking, the furnace wall pressure was 0 kPa, and then gradually increased. In the middle stage of coking, when the furnace center temperature is 600℃ to 900℃, the furnace wall pressure rises rapidly to a maximum of 23kPa, then decreases to 6kPa, and then slowly increases to 6.9kPa for coking. It can be seen from Figure 7 that the 3647G coal alone has a measured gas furnace pressure, and the maximum furnace pressure is 23kPa in the middle stage of coking.

Please refer to FIG. 8 , which shows the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall in the coking process of 3658 mixed coal. 3658 mixed coal is to mix 10 kinds of individual coals evenly and then add them to coke oven for coking. Figure 8 shows that the furnace wall temperature in the coking process rises from 850 °C to 1080 °C, and then the furnace door is turned off and coke is released. The furnace center temperature was 1031°C when the coke was released. At the beginning of coking, the furnace wall pressure dropped to -1kPa, and then gradually increased, reaching a maximum of 5.5kPa at the time of coking.

Please refer to FIG. 9 , which shows the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall in the coking process of 3620 mixed coal. Figure 9 shows that the furnace wall temperature in the coking process increased from 850 °C to 1063 °C, and the furnace door was opened to release coke after the power was turned off. The furnace center temperature was 1039°C when the coke was released. At the beginning of coking, the furnace wall pressure was 0 kPa, and then gradually increased. In the middle stage of coking, when the furnace center temperature is 600℃ to 900℃, the furnace wall pressure rises rapidly to a maximum of 11kPa, then decreases to 6.9kPa, and then slowly increases to 8.6kPa at the time of coking. It can be seen that the gas furnace pressure of 3620 mixed coal is measured in the middle stage of coking, and the measured gas furnace pressure is greater than the coke oven pressure.

According to the above test measurement, the inventor defines the gas furnace pressure as the furnace wall pressure rises to the highest rapidly and then decreases when the furnace core temperature is 600°C to 900°C in the middle stage of coking. In addition, the maximum furnace pressure of the above-mentioned single coal and mixed coal is compared with the furnace pressure of coke, as shown in Table 1 below. Among them, for those without gas furnace pressure, the maximum furnace pressure is equal to the coke oven pressure, which is generated by the furnace wall temperature; and for those with gas furnace pressure, the maximum furnace pressure is equal to the gas furnace pressure or coke oven pressure. It can be seen from the above test results that the measurement and evaluation method of the present disclosure can measure low gas furnace pressure, for example, the gas furnace pressure of 3653S single coal is lower than the coke oven pressure. Table 1 3633K Coal alone 3645P Coal alone 3653S Coal alone 3647G Coal alone 3658 Mixed coal 3620 Mixed coal gas furnace pressure none none 6.8 twenty three none 11 Maximum furnace pressure 4 4.5 6.9 twenty three 5.5 11 coke oven pressure 4 4.5 6.9 6.9 5.5 8.6

It can be seen from the above-mentioned embodiments that one of the advantages of the present disclosure is that the gas furnace pressure evaluation method and device of the present disclosure can effectively evaluate the gas furnace pressure status of individual coal or mixed coal, and can exclude the use of dangerous coal, thereby enabling Avoid damage to the coke oven during the coking process.

Another advantage of the present disclosure is that because the method and apparatus for evaluating the gas furnace pressure of the present disclosure can measure low gas furnace pressures, it can be applied to the evaluation of coal briquetting in low gas furnaces.

Although the present disclosure has been disclosed above with examples, it is not intended to limit the present disclosure. Anyone with ordinary knowledge in this technical field can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the appended patent application.

100: Steps 110: Steps 120: Steps 200: Mobile Wall Coke Oven 210: Coking Room 212: Feeding port 220: Fixed heated wall 230: Mobile Heating Wall 300: Evaluation Equipment 310: First Thermometer 320: Second Thermometer 330: Furnace wall pressure monitoring device 332: Load Gauge 334: Power Transmission Rod 334a: first end 334b: second end 340: Recorder 342: connecting line 344: connecting line 346: connecting line 350: Computer 352: connecting line 400: Fixed Wall

In order to make the above and other objects, features, advantages and embodiments of the present disclosure more clearly understood, the accompanying drawings are described as follows: [FIG. 1] is a flowchart illustrating a method for evaluating gas furnace pressure according to an embodiment of the present disclosure; [ Fig. 2 ] is a schematic diagram of a device for evaluating the gas furnace pressure of the coal to be evaluated according to an embodiment of the present disclosure; [Fig. 3] shows the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall when the moving wall coke oven is empty; [Fig. 4] is a graph showing the coking process of 3633K single coal and the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the mobile heating wall after coking; [Fig. 5] is a graph showing the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall in the coking process of 3645P single coal; [Fig. 6] is a graph showing the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall in the coking process of 3653S coal; [Fig. 7] is a graph showing the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall in the coking process of 3647G coal; [Fig. 8] is a graph showing the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall in the coking process of 3658 mixed coal; and [Fig. 9] is a graph showing the temperature change curve of the furnace center, the furnace wall temperature change curve, and the furnace wall pressure change curve of the moving heating wall in the coking process of 3620 mixed coal.

Domestic storage information (please note in the order of storage institution, date and number) none Foreign deposit information (please note in the order of deposit country, institution, date and number) none

200: Mobile Wall Coke Oven

210: Coking Room

212: Feeding port

220: Fixed heated wall

230: Mobile Heating Wall

300: Evaluation Equipment

310: First Thermometer

320: Second Thermometer

330: Furnace wall pressure monitoring device

332: Load Gauge

334: Power Transmission Rod

334a: first end

334b: second end

340: Recorder

342: connecting line

344: connecting line

346: connecting line

350: Computer

352: connecting line

400: Fixed Wall

Claims (10)

A method for evaluating gas furnace pressure, comprising: placing a coal to be evaluated into a coking chamber of a moving wall coke oven, wherein the moving wall coke oven comprises a fixed heating wall and a moving heating wall opposite to each other; Carrying out a coking process for the coal to be evaluated, including measuring and recording the change in the center temperature of one of the moving wall coke ovens, the change in the temperature of a furnace wall, and the change in the pressure of one of the walls of the moving heating wall; and According to the furnace center temperature change, the furnace wall temperature change, and the furnace wall pressure change, the gas furnace pressure condition of the coal to be evaluated is evaluated, wherein in the middle stage of coking in the coking process, and the furnace wall pressure change is at When the central temperature of one of the moving wall coke ovens rapidly rises to a maximum furnace wall pressure during the period of 600°C to 900°C and then decreases, the gas furnace pressure of the coal to be evaluated is evaluated as a gas furnace pressure. The method for evaluating gas furnace pressure as claimed in claim 1, wherein the coal to be evaluated comprises single coal or mixed coal. The method for evaluating the gas furnace pressure according to claim 1, further comprising raising the temperature of a furnace wall of the moving wall coke oven from room temperature before placing the coal to be evaluated into the coking chamber of the moving wall coke oven to 850°C, and measure and record the change of the center temperature of an empty furnace of the moving wall coke oven, the temperature change of an empty furnace wall, and the pressure change of an empty furnace wall of the moving heating wall. The method for evaluating gas furnace pressure according to claim 3, further comprising obtaining an observation result based on the change in the center temperature of the empty furnace, the change in the wall temperature of the empty furnace, and the change in the wall pressure of the empty furnace for evaluating the pending furnace Reference is made when evaluating the gas furnace pressure condition of coal, wherein the observation results include that a furnace wall pressure of the moving heating wall is related to a temperature effect, and has a delay effect. The method for evaluating gas furnace pressure as claimed in claim 1, wherein measuring the furnace wall pressure of the movable heating wall comprises using a furnace wall pressure monitoring device, wherein the furnace wall pressure monitoring device includes: a load cell mounted on a fixed wall; and A power transmission rod, wherein the power transmission rod has a first end and a second end opposite to each other, the first end abuts on the moving heating wall, and the second end abuts on the load cell. A gas furnace pressure evaluation device, suitable for evaluating the gas furnace pressure of a coal to be evaluated in a moving wall coke oven, the moving wall coke oven comprising a coking chamber and two opposite sides of the coking chamber. A fixed heating wall and a movable heating wall, the gas furnace pressure evaluation equipment includes: a first thermometer, disposed in the coking chamber, and configured to measure a furnace center temperature of the moving wall coke oven; a second thermometer, arranged on the fixed heating wall or the movable heating wall, and configured to measure the temperature of a furnace wall of the movable wall coke oven; a load cell mounted on a fixed wall and configured to measure a wall pressure of the mobile heating wall; and A power transmission rod, wherein the power transmission rod has a first end and a second end opposite to each other, the first end abuts on the moving heating wall, and the second end abuts on the load cell. The gas furnace pressure evaluation device as claimed in claim 6, wherein the force transmission rod comprises a stainless steel rod, and a length of the stainless steel rod is adjustable. The gas furnace pressure evaluation device as claimed in claim 6, further comprising a recorder, wherein the recorder is connected with the signals of the first thermometer, the second thermometer, and the load meter, and is configured to receive and record signals from the A plurality of furnace center temperature values, a plurality of furnace wall temperature values, and a plurality of furnace wall pressure values of the movable heating wall are transmitted from the first thermometer, the second thermometer, and the load gauge. The gas furnace pressure evaluation equipment as claimed in claim 8, further comprising a computer, wherein the computer is connected with the recorder signal to receive and process the furnace core temperature values, the furnace temperature values transmitted from the recorder The wall temperature value, and the furnace wall pressure values of the mobile heating wall. The gas furnace pressure evaluation device as claimed in claim 9, wherein the computer is further configured to draw the to-be-to-be based on the furnace center temperature values, the furnace wall temperature values, and the furnace wall pressure values of the movable heating wall Evaluate a furnace center temperature change curve, a furnace wall temperature change curve, and a furnace wall pressure change curve, and carry out the process according to the furnace center temperature change curve, the furnace wall temperature change curve, and the furnace wall pressure change curve. Evaluation of the gas furnace pressure status of the coal to be evaluated.

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