JP3536753B2 - Cooling tower internal monitoring device for coke dry fire extinguishing equipment and coke reforming method in coke dry fire extinguishing equipment using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a technique for measuring the temperature distribution, gas composition distribution and pressure distribution inside a cooling tower of a coke dry fire extinguishing system during its operation, and to measure the gas in a prechamber based on the measurement results. TECHNICAL FIELD The present invention relates to a coke dry-fire extinguishing system operation technology that reforms coke by making the temperature distribution inside the coke layer uniform by improving the drift of the coke.

[0002]

2. Description of the Related Art Conventionally, coke dry fire extinguishing equipment (Coke Dr.
y Quencher (so-called CDQ) is used as a part of coke production equipment that contributes to energy saving by recovering the sensible heat of glowing coke discharged from a coke oven.

FIG. 10 is a schematic longitudinal sectional view of a CDQ provided with a prechamber in a coke cooling tower.

[0004] As shown in FIG.
It is charged into the pre-chamber 3 above the cooling tower 2 and gradually descends to the cooling chamber 4. On the other hand, an inert gas 6 for cooling such as nitrogen is
The pressure is sent from the lower part in the chambers 3 and 4. The inert gas 6 that has absorbed the sensible heat of the red hot coke 1
After that, heat is recovered in the boiler 8. The steam generated by this is sent back to the cooling chamber 4 by the circulation blower 5.

However, the following proposals have been made for a high-productivity coking system for coal, which is one of the problems in recent coke production technology. That is, by lowering the in-coal temperature at the time of taking out of the coke oven kiln from a normal temperature of about 1000 ° C. to a temperature of about 800 to 850 ° C. (hereinafter referred to as “medium / low temperature”) to shorten the carbonization time,
It has been proposed that the production rate of a coke oven be increased, and then the coke be reformed with CDQ to improve the coke productivity.

It is known that there is a relationship between the carbonization temperature of coal and the coke strength, as shown in FIG. 11, in which the coke strength decreases as the carbonization temperature decreases.

[0007] Therefore, coke discharged from the coke oven is continuously charged into CDQ, and is efficiently reheated in a pre-chamber to reform coke and maintain its quality. Thus, proposals have been made to improve coke productivity.

[0008] For example, Japanese Patent Application Laid-Open No. 2-194087 discloses that air is blown into a pre-chamber portion of a CDQ, and volatile components and powder coke remaining in coke charged in the pre-chamber are burned to recycle the coke. A method of heating and reforming the material is disclosed (referred to as “prior art 1”).

However, when reforming coke in the CDQ pre-chamber, it is difficult to uniformly raise the coke to a required temperature.

On the other hand, for example, Japanese Patent Application Laid-Open No. 7-268
No. 336 discloses that hot air is introduced into a pre-chamber of CDQ,
Alternatively, the high-temperature exhaust gas obtained by burning the CDQ circulating gas is blown, the surface temperature of coke in an upper region in the pre-chamber is measured, and the amount and temperature of the hot air or the high-temperature exhaust gas are controlled based on the measured value, and A method for controlling the surface temperature within a predetermined range is disclosed (referred to as “prior art 2”).

[0011]

As described above, coke discharged from a coke oven at a medium to low temperature of about 800 to 850 ° C. is reformed by reheating in a prechamber of a cooling tower of CDQ to reform coke. There have been proposals to maintain quality and thus improve coke productivity.

In order to ensure the development of the coke reforming technology in the cooling tower pre-chamber of the CDQ, the thermal and atmospheric conditions of the coke in the cooling tower pre-chamber must be accurately grasped. It is important to take appropriate actions according to the situation.

However, conventionally, even when air is blown into the upper space of the pre-chamber after charging the coke,
Alternatively, even when hot air or high-temperature exhaust gas is blown, there is no disclosure of a technique for accurately grasping the state of the inside of the coke layer in the pre-chamber during the reheating of the coke. There is no disclosure of what is happening.

Accordingly, the present inventors have developed a technique for monitoring the inside of a coke layer in a high-temperature state in a pre-chamber of a cooling tower of a CDQ after medium-low-temperature coke has been charged, and have developed a pre-chamber during reheating of coke. The emphasis was on understanding the factors that hinder coke reforming by understanding the actual conditions within the company, and developing basic technologies for proper coke reforming.

Accordingly, an object of the present invention is to provide a monitoring apparatus for the inside of a cooling tower pre-chamber of a coke dry-type fire extinguishing facility and a method of reforming coke in a coke dry-type fire extinguishing facility using the same, which can achieve the above-mentioned objects. To provide.

[0016]

Means for Solving the Problems The inventors of the present invention have conducted the following studies from the above viewpoints, and have obtained the following findings.

The temperature distribution, gas composition distribution and gas pressure inside the coke layer when air is blown from the upper part of the prechamber of the cooling tower of the CDQ after the middle and low temperature coke is charged to reheat the coke layer. A technique for measuring the distribution was developed, and the obtained measurement results were analyzed.

As a result, the gas flow state inside the coke layer in the pre-chamber shows that the particle size distribution of the coke is
When the peripheral part is coarser than the central part, the flow rate is larger in the peripheral part than in the central part,
Furthermore, when the position on the radial line was the same, it was understood that the flow rate was larger on the boiler installation side than on the anti-boiler installation side with respect to the difference due to the circumferential position.

Then, it was found that the gas flow rate in the peripheral portion was large inside the coke layer in the pre-chamber, and that a one-sided gas drift was generated toward the boiler installation side. Further, the measurement results of the temperature distribution, gas composition distribution, and gas pressure distribution inside the coke layer are analyzed, and the coke layer is reheated in the pre-chamber and cooled in the cooling chamber.
The relationship between the coke discharged from DQ and the quality test results was discussed.

As a result, it is possible to make the temperature distribution inside the coke layer uniform by reducing the gas drift in the pre-chamber, and to reform the coke charged at medium to low temperature uniformly in the pre-chamber. It was found that it could be done. At the same time, as a pre-chamber internal monitoring device for uniformly reforming coke, a so-called sonde suitable for accurately and efficiently measuring each distribution of temperature, gas composition and gas pressure. It has been found that new development of is essential.

The present invention has been made based on the above findings, and the gist is as follows.

According to the first aspect of the present invention, there is provided a monitoring device for grasping a state inside a cooling tower of a coke dry-type fire extinguishing system during operation, the monitoring device includes a lance inserted into the cooling tower. A measuring body attached to the tip of the lance, a thermometer, a gas analyzer, and a gas manometer, and the measuring body is provided with a temperature sensor and a gas suction hole. I have. The temperature sensor is connected to a thermometer, and the gas suction hole is connected to a gas analyzer and a pressure gauge.

According to a second aspect of the present invention, in the first aspect of the present invention, the lance has a water-cooled structure, and the measuring body is attached to a tip portion of the lance via a heat insulating material. A thermocouple is fixed inside the protective tube as the temperature sensor, and a thermocouple contact is located at a distal end of the protective tube, and is formed on a wall of the protective tube. A plurality of through holes communicating with the outside atmosphere of the protection tube are provided as the gas suction holes, and the outside atmosphere gas of the protection tube is sucked and passed through the inside of the protection tube through the through hole. A gas passage is formed, and inside the protection tube, at a longitudinally intermediate portion of the protection tube, at a position rearward of the thermocouple contact, along with a water cooling structure of the lance with respect to the thermocouple contact. The effect of cooling Thermal insulation for disconnection and it has the characteristics that have been filled.

According to a third aspect of the present invention, the temperature distribution, gas composition distribution and pressure distribution in the pre-chamber of the cooling tower are measured using the cooling tower internal monitoring device according to the first or second aspect. The present invention is characterized in that coke is reformed by improving the drift of the gas in the pre-chamber based on the measured values obtained.

[0025]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a cooling tower internal monitoring apparatus in a coke dry-type fire extinguishing facility according to the present invention, and FIG. 2 is a block diagram showing a cooling tower internal monitoring apparatus in a coke dry-type fire extinguishing apparatus of the present invention. FIG. 4 is a longitudinal sectional view showing a measurement body attached to the tip of the lance.

1 and 2, reference numeral 9 denotes a lance, 1
0 is a measuring body, 11 is a thermometer, 12 is a gas analyzer, 13 is a gas pressure gauge, 14 is a thermocouple as a temperature sensor, and 15 is a gas suction hole.

As shown in FIG. 1, the lance 9 is composed of a water-cooled structure fixed to the tip of a lance holder 16 and has a cooling water passage provided therein. A required distance according to the inner diameter of the chamber 4 can be moved forward and backward (arrows in the left-right direction in FIG. 1). The lance 9 is moved forward and backward by a predetermined drive mechanism 18. The drive mechanism 18 includes a hydraulic device 19, a piston / cylinder 20, a hydraulic pipe 25, and the like. The measuring body 10 is attached to the tip of the lance 9 via a heat insulating material 21a.

As shown in FIG. 2, the measuring body 10 has an outer peripheral portion formed of a heat-resistant protective tube 22, and a plurality of gas suction holes 15 provided in the peripheral wall. Is formed with a gas passage 24 for guiding the gas sucked from the gas suction hole 15 to the gas sampling device 23 (see FIG. 1), and a thermocouple 14 serving as a temperature sensor is wired. A thermocouple contact 14a is fixed near the portion. Inside the protective tube 22, there is further provided a heat insulating material 21.
b is filled in the rear (lance 9 side) of the thermocouple contact 14a. However, a through hole is provided in the heat insulating material 21b and communicates with the gas passage 24.

The thermocouple 14 provided on the measuring body 10 is connected to the thermometer 11 via a compensating lead wire 26, and the measured temperature value is displayed and recorded on the operation panel 34. The atmospheric gas at the outer periphery of the protective tube 22 sampled by the suction pump 28 through the pipe 27 from the gas suction hole 15 provided in the measuring body 10, that is, the gas sample at a predetermined position inside the CDQ cooling tower 2, is supplied to a predetermined valve stand. 29. By operating the valve stand 29 by the operation panel 34, the sample gas is supplied to the gas analyzer 1 via the gas sampling device 23.
2 or to a gas pressure gauge 13 to analyze the component composition of the sample gas or measure the gas pressure, respectively. The thus obtained gas analysis results and gas pressure measurement results are transmitted to the operation panel 34 for display and recording.

When measuring the temperature at a predetermined position inside the coke layer inside the CDQ cooling tower 2, the water cooling structure lance 9 is used.
It is important to ensure that the water cooling does not have an effect.
Insulating material 21 interposed between lance 9 and measuring body 10
a and the heat insulating material 21b filled in the measurement body 10 exhibit the effect of eliminating the influence of the water cooling.

In analyzing the gas composition at a predetermined position in the coke layer inside the CDQ cooling tower 2, after the gas sampling at the previous sampling position is completed, the sampling gas at the previous sampling position remains in the gas sample at the current sampling position. It is important that mixing can be eliminated as quickly and completely as possible.

For this purpose, a large number of gas suction holes 15 are provided on the outer peripheral wall of the protection tube 22 of the measuring body 10, and the outside atmosphere gas and the protection tube 22 are protected by a suction pump 28 through a pipe 27.
By sucking the internal residual gas and the residual gas in the pipe, gas sampling at a predetermined sampling position can be performed with high accuracy. Further, inside the gas sampling device 23,
As shown in FIG. 1, a required plurality of sample bags 23 are provided.
If a is provided, even during the time required for gas analysis at the previous sampling position, gas sampling is performed at the current sampling position and the next sampling position, and a gas sample is stored.
It is very convenient because it performs a preparation function and a buffer function.

FIG. 3 shows an example of the height position of the pre-chamber into which the sound of the CDQ cooling tower is inserted when the device for monitoring the inside of the CDQ cooling tower of the present invention is used.
FIG. 3 shows a schematic plan view of FIG.

Here, reference numeral 30 denotes a sonde, which is a lance 9, a measuring body 10, and a lance holder 17 shown in FIG.
And a guide 16.
Shows a state in which is inserted. The sonde 30 is inserted horizontally toward the center of the pre-chamber 3 from the red-hot coke charging inlet 31 in the upper part of the cooling tower 2 into the single layer of the red-hot coke charged into the pre-chamber 3. Air 32 is blown into the upper space of the pre-chamber 3 as a coke reheating gas, and the coke layer in the pre-chamber 3 is heated and heated. Measuring body 1 attached to tip of lance 9 of sonde 30
0 is pushed into an oxidizing atmosphere at a temperature of about 1000 to 1500 ° C., and the temperature, gas component composition and gas pressure at a predetermined position are measured. The protective tube 22 and the lance 9 of the measuring body 9 must have a material and a dimensional shape that can withstand such environmental conditions under the load condition of coke applied thereto.

The durability of the lance 9 can be remarkably improved by using a water-cooled structure. On the other hand, the influence of this cooling is caused by the measurement body 10 attached to the tip of the lance 9.
To avoid reaching the internal thermocouple contact 14a,
As described above, it is desirable to interpose the heat insulating material 21a between the lance 9 and the measuring body 10. Further, it is difficult to avoid a decrease in the coke layer temperature around the lance 9 due to the effect of the water cooling. However, at least the temperature inside the coke layer around the measuring body 10 must be prevented from lowering. The present inventors have tested the use of the sonde 30 using a CDQ having a pre-chamber 3 having an inner diameter of about 6.5 m and a height of about 5.5 m, and made the following improvements to solve this problem. Settled.

That is, when the probe 30 is inserted into the pre-chamber 3 horizontally, for example, and the temperature distribution in the radial direction of the pre-chamber 3 is to be measured, a plurality of measurement points (for example, P ₅ , P ₄ ,..., P ₁ , or P ₅ ′, P ₄ ′,..., P ₁ ′), and the measuring point (P ₅ or P ₅₎ closest to the inner wall of the pre-chamber 3 first. ₅ ') measured at successively later, measurement is carried out at predetermined measuring points toward the center and finally the center (P ₁ or P _1') there is a need for a method of measuring the. Lance 9
It is necessary to take this method in order to avoid the danger of measuring the coke layer portion whose temperature has decreased due to the effect of water cooling. However, this alone is not always enough.

That is, the residence time of the measuring body 10 at one measurement point is moved to the next measurement point near the center with a sufficient time margin so that the cooling of the lance 9 is not affected. It is also important that the heat resistance of No. 9 withstand sufficiently during one cycle measurement time. From these viewpoints, the upper limit of the required time at one measurement point must be determined. According to the research results of the present inventors, in the case of the pre-chamber 3 having an inner diameter of about 6.5 m, including the time required for sampling for gas component composition analysis and measurement for gas pressure measurement, in addition to temperature, As illustrated in FIG. 3, five measurement points are set at equal intervals on the radius, the measurement time at one measurement point is set to about 3 minutes, and the cycle time including the pushing movement time of the sonde 30 is set to 20. It is desirable to complete the measurement on one radius in about a minute. The measurement point position on the radius, the number of measurement points, the measurement point interval, and the time required for measurement at one measurement point are appropriately determined according to equipment specifications such as the inner diameter of the chamber and operating conditions.

The reheating in the pre-chamber 3 reforms the coke charged at a low temperature. The reason why the reforming state is not uniform is that the temperature distribution in the coke layer is not uniform. It was found that the non-uniform distribution was caused by a non-uniform distribution in the gas flow in the pre-chamber 3. However, in order to grasp the non-uniform distribution, the temperature was determined in the following manner. , Gas component composition and gas pressure are measured.

The positions of the measuring points on the radial line at a predetermined height in the pre-chamber 3, the number of measuring points, the measuring point interval, the measuring order and the required measuring time are as described above.
Based on the measurement result, it is determined whether or not there is a drift to the peripheral portion in the pre-chamber 3. The direction of the measured radial direction with respect to the circumferential direction of the same horizontal plane radius at the predetermined height, that is, the direction in which the sound 30 is inserted into the inside of the pre-chamber 3 is, for example, as shown in the plan view of the cooling tower 2 in FIG. As shown, 60 ° to 70 ° to the boiler side radial direction
What is necessary is just to turn to a center part from the direction which forms an angle.

However, when trying to obtain basic data specific to the CDQ, the data is directed toward the center from at least two directions: a radial direction on the boiler side and a radial direction on the opposite side of the boiler. It is desirable to insert the sonde 30.

Based on the result, it is possible to always accurately determine whether or not the reheating gas has been deflected toward the boiler. Further, the height direction measurement of the pre-chamber 3 is performed within a range of about 1 m below the upper surface of the inserted red hot coke 1. We have an internal diameter of about 6.5.
CDQ with pre-chamber 3 with a height of about 5.5 m
According to the test using, when air 32 is blown into the upper space in the pre-chamber 3 from the peripheral wall of the red hot coke charging inlet 31 to reheat the red hot coke 1, the temperature rising region of the red hot coke 1 is deep from the upper surface thereof. It was understood that it was about 1 m.

The temperature, gas component composition and gas in the pre-chamber 3 are measured using the monitoring apparatus for the inside of the coke layer according to the present invention and in accordance with the measuring procedure appropriately determined according to the specifications of the CDQ equipment to be used and the operating conditions. The pressure is measured to determine whether or not gas drift has occurred in the coke layer.
And, when the occurrence of drift is recognized, as follows:
An action is taken in accordance with the state of occurrence of the drift, and coke charged at medium to low temperature is reheated in the pre-chamber 3 to achieve uniformity in quality such as coke strength. (1) When the gas drift occurs in the radial direction of the pre-chamber 3, it is caused by the segregation of the charging distribution of the red hot coke particle size. In the action, a baffle such as a bell is provided near the glow coke inlet 31 to improve the segregation. (2) When the gas drift is one-sided to the boiler side, the blowing amount of the air 32 as the reheating gas is adjusted for each blowing position to adjust the blowing amount distribution or to circulate. The opening area of the gas flue 33 is adjusted so as to eliminate one side pull.

When the coke reforming level is not sufficient, the blending coal is appropriately added to the red hot coke 1 to replenish the heat source.

The above-described monitoring apparatus for the inside of a coke layer of the present invention can measure not only the state inside the pre-chamber but also the state inside the cooling chamber in the CDQ cooling tower 2.

[0046]

EXAMPLES The present invention will be described in more detail with reference to Examples.

The following test was conducted using a coke dry fire extinguishing system of the type shown in FIG.

Air 32 was blown into the upper space of the pre-chamber 3 with respect to the red-hot coke 1 which was taken out of the coke oven and charged in the pre-chamber 3, and was heated again. On the other hand, the state inside the pre-chamber 3 during the reheating of the red hot coke 1 was measured using the cooling tower internal monitoring device shown in FIGS. 1 and 2. The measurement items are temperature, gas component composition, and gas pressure. The insertion of the sonde 30 into the pre-chamber 3 was performed according to the embodiment illustrated in FIGS.

The insertion positions of the sonde 30 are two positions, that is, an upper position and a lower position of the pre-chamber 3 with respect to the height position, and the upper position is the position of the annular circulating gas flow 33 provided inside the side wall of the pre-chamber 3. The top and bottom positions are
At the lower end of the circulating gas flu 33, the interval between them in the height direction is about 5.5 m. Regarding the circumferential direction of insertion of the sonde 30, the upper sonde is at an angle of 61 ° with respect to the center of the boiler, and the lower sonde is at an angle of 66 ° with respect to the center of the boiler. And
As illustrated in FIG. 3, the radial positions of the measurement points are equal points (P ₅ , P ₅₎ from a point P ₅ near the peripheral wall to a point P ₁ at the center.
P _4, ····, P _{1, and, P 5 ', P 4'} , ····,
P ₁ ').

Table 1 shows the main operating conditions of the coke oven that produced the red hot coke 1 and the main operating conditions of the CDQ.
And the test level of the amount of air 32 blown into the pre-chamber 3 is shown. However, the air 32 blowing amount is the total value of the blowing amounts in 1/3 increments from three equally divided locations in the circumferential direction.

[0051]

[Table 1]

The results of the above test are as follows.

(1) FIG. 5 shows the effect of air 3 on the temperature distribution and gas pressure distribution inside the coke layer in the pre-chamber 3.
FIG. 6 shows the effect of the blowing amount of air 32 on the gas composition distribution inside the coke layer in the pre-chamber 3 for both the upper position and the lower position.

As a result of considering these measurement results, CDQ
When air is blown into the pre-chamber for the purpose of reforming the low-temperature coke inside the pre-chamber, the gas flow at the upper and lower parts of the pre-chamber is larger at the periphery than at the center, and It turned out that it was drifting. When air is blown, the temperature of coke in the pre-chamber rises.

(2) The relationship between the blowing amount of the air 32 and the effect of improving the coke strength was measured by the following method. For one level of air blowing, 8 coke oven test kilns are designated,
Eight kilns of low-temperature coke were continuously charged into the CDQ, and sampling of red-hot coke during the coke treatment near the middle of eight kilns from the relationship between the elapsed time after the start of charging the coke and the amount of emissions from the CDQ Was performed. Repeat DI ¹⁵⁰ ₁₅ for each level of air blowing for the collected sample.
Measured times. Figure 7 shows the relationship between the blowing amount and DI ^0.99 ₁₅ air. From the figure, the improvement of the strength index of medium-low temperature coke with the increase of the air blowing amount was quantitatively grasped. In FIG. 7, the [Delta] Di ^0.99 _15, (please to this description.) (3) Then, to construct a CDQ the material flow simulation model. According to this, it was found that when the charged distribution of the particle size of the charged red hot coke 1 was segregated, gas drift occurred in the radial direction of the pre-chamber 3.
Therefore, in order to prevent segregation of the particle size distribution of coke, a test was conducted in which a bell was installed at the charging inlet 31 of the red hot coke 1. FIG. 8 shows the calculation results of (a) the average particle size distribution and (b) the falling velocity distribution of coke in the pre-chamber depending on whether or not the bell is installed.

(4) The opening area of the circulating gas flue 33 on the boiler side was reduced in consideration of the occurrence of one-sided gas drift toward the boiler installation side. Further, a bell was installed to improve the coke particle size distribution in the radial direction, and a test was performed in which the flow rate of the air 32 was increased (75 Nm ³ / T) to measure the temperature distribution in the coke layer.

FIG. 9 shows the temperature distribution in the radial direction at the upper position of the pre-chamber 3 in the case where all three actions of reducing the opening area of the circulating gas flow, installing the bell, and increasing the air blowing flow rate are shown. An example in which only the action of increasing the air blowing flow rate is taken will be described.

As described above, the temperature distribution in the CDQ pre-chamber can be made uniform by using the cooling tower internal monitoring device of the present invention, and the strength of the medium-low temperature coke can be improved considerably uniformly.

[0059]

As described above, according to the monitoring apparatus for the inside of a coke layer of the present invention, the temperature distribution, the gas composition and the gas composition inside the cooling tower of the coke dry fire extinguishing equipment, particularly inside the coke layer in the pre-chamber. It has become possible to measure gas pressure. As a result, it became possible to grasp the state of drift of the gas generated inside the coke layer, and to take an appropriate action to suppress the formation of the drift. As a result, the temperature of the coke can be increased uniformly over the inside of the layer.

As a result, the coke which had been discharged from the coke oven at about 1000 ° C.
At the stage when the temperature reached about 0 ° C, the coke was discharged from the kiln, and the coke charged at the medium temperature could be uniformly reformed in the pre-chamber of the coke dry fire extinguishing equipment.

According to the present invention, the technical effects described above are exhibited, so that the coke oven and the coke dry fire extinguishing equipment can be operated appropriately, and the coke productivity can be significantly improved. And a coke reforming method in a coke dry-type fire extinguishing facility using the same can provide an industrially useful effect.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an example of a cooling tower internal monitoring device in a coke dry fire extinguishing facility of the present invention.

FIG. 2 is a longitudinal sectional view of a measurement body attached to a lance tip portion of FIG.

FIG. 3 is a schematic longitudinal sectional view showing an example of use of a prechamber into which a sonde is inserted in the cooling tower internal monitoring device of the present invention with respect to a height direction position.

FIG. 4 is a schematic plan view of FIG.

FIG. 5 shows the temperature distribution inside the coke layer in the pre-chamber,
6 is a graph showing the effect of the air blowing amount on the gas pressure distribution.

FIG. 6 is a graph showing an influence of an air blowing amount on a gas composition distribution inside a coke layer in a pre-chamber.

FIG. 7 is a graph showing the relationship between the amount of air blown into the upper space in the pre-chamber and the effect of improving coke strength.

FIG. 8 is a graph showing a calculation example of the improvement effect of the average particle size distribution and the descending speed distribution of coke in the pre-chamber when a bell is installed at the entrance of the CDQ charging inlet.

FIG. 9 is a graph showing an example of improvement in the radial temperature distribution at the upper position of the pre-chamber when all three actions of reducing the opening area of the circulating gas flue, installing the bell, and increasing the air blowing flow rate are taken. is there.

FIG. 10 is a schematic vertical cross-sectional view illustrating an example of a coke dry fire extinguishing system having a prechamber in a coke cooling tower.

FIG. 11 is a graph illustrating the relationship between the carbonization temperature of coal and coke strength. .

[Explanation of symbols]

1: Red hot coke 2: Cooling tower 3: Pre-chamber 4: Cooling chamber 5: Circulating blower 6: Inert gas 7: Dust box 8: Boiler 9: Lance 10: Measurement object 11: Thermometer 12: Gas analyzer 13: Gas pressure gauge 14: Thermocouple 14a: thermocouple contact 15: Gas suction hole 16: Lance holder 17: Guide 18: Drive mechanism 19: Hydraulic device 20: piston and cylinder 21a: Insulation material (between lance and measuring body) 21b: Insulation material (inside the protection tube for measuring body) 22: Protection tube 23: Gas sampling device 23a: Sample bag 24: Gas passage 25: Hydraulic piping 26: Compensation conduit 27: Piping 28: Suction pump 29: Valve stand 30: Sonde 31: Red hot coke charging entrance 32: Air 33: Circulating gas flu 34: Operation panel

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C10B 39/00 C10B 41/00 C10B 57/00

Claims (3)

(57) [Claims] 1. A monitoring device for ascertaining a state inside a cooling tower of a coke dry-fire extinguishing facility during operation thereof, the monitoring device comprising a lance inserted into the cooling tower, and a tip of the lance. A measuring body, a thermometer, a gas analyzer, and a gas manometer mounted on the measuring body; the measuring body is provided with a temperature sensor and a gas suction hole; and A sensor for monitoring the inside of a cooling tower of a coke dry fire extinguishing system, wherein a sensor communicates with the thermometer, and the gas suction hole communicates with the gas analyzer and the pressure gauge. 2. The lance has a water-cooled structure, the measuring body is attached to a distal end of the lance via a heat insulating material, and the measuring body has a heat-resistant protective tube at an outer peripheral portion thereof. A thermocouple is fixed inside the protective tube as the temperature sensor, and a thermocouple contact is located at a tip portion of the protective tube, and a wall of the protective tube communicates with the outside atmosphere of the protective tube as the gas suction hole. A plurality of through holes are provided, and a gas passage is formed inside the protective tube, through which the external atmosphere gas of the protective tube is sucked and passed through the through hole. The inside of the protection tube is filled with a heat insulating material at a middle portion in a longitudinal direction of the protection tube, at a position behind the thermocouple contact, in order to cut off the cooling effect of the water cooling structure of the lance on the thermocouple contact. Is characterized by The internal monitoring device for a cooling tower of a coke dry fire extinguishing facility according to claim 1. 3. A temperature distribution in a pre-chamber of the cooling tower using the cooling tower internal monitoring device according to claim 1 or 2.
A coke reforming method in a coke dry fire extinguishing facility, comprising measuring a gas composition distribution and a pressure distribution, and improving a coke by improving a gas drift in the pre-chamber based on the measured values.