JP3965097B2 - Suction control mechanism of chamber coke oven generated gas - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a generated gas suction control mechanism in a chamber-type coke oven that discharges coke oven gas generated from a carbonization chamber to a dry main through a riser pipe.
[0002]
[Prior art]
Coke oven gas generated in the operation of the coke oven is collected in the dry main through the rising pipe portion and the curved pipe portion of the riser pipe, cooled in the dry main, and then guided to the suction main pipe for processing. And in the process from coal charging to the end of dry distillation, it is necessary to make the curved pipe part of the riser pipe and the dry main communicate with each other, and after the completion of dry distillation, the curved pipe part of the riser pipe and the dry main need to be shut off . Further, in order to perform efficient operation, it is necessary to appropriately control the suction pressure in the ascending pipe.
For this reason, conventionally, various techniques for appropriately controlling the suction pressure in the ascending pipe have been proposed.
For example, the dry main pressure is set to a negative pressure for each kiln, and the method of adjusting the pressure in the carbonization chamber by adjusting the control damper in the riser is combined with the method of flushing high-pressure water or steam in the riser at high speed. A pressure control technique has been proposed (see Patent Document 1). This technology employs a system that performs adjustment damper and flushing flow rate adjustment via a process controller for maintaining the pressure in the carbonization chamber at an appropriate negative pressure based on the detection output of the pressure sensor installed in the furnace body, Automatic operation is to be performed. As a result, the pressure controllability in the carbonization chamber can be maintained well, the negative pressure can be suppressed within an allowable range, and the leakage of external air and gas leakage between the carbonization chamber and the combustion chamber can be minimized. .
[0003]
Further, a plurality of switchable pressurized fluid supply pipes are connected to the pressurized fluid supply nozzle provided in the curved pipe portion of the riser pipe, and at least one of the plurality of pipe systems is connected to the inlet of the pressurized fluid supply nozzle. A technique has been proposed in which the pressure of the pressurized fluid is adjusted based on the measured value of the gas pressure inside the dry main using a piping system in which the pressurized fluid pressure is adjustable (see Patent Document 2). According to this technique, intermittent gas leakage from the coke oven can be prevented.
[0004]
Further, a connecting pipe with a shut-off valve that communicates with the curved pipe section of the rising pipe of the adjacent carbonizing chamber is provided in the curved pipe section of each carbonizing chamber, and the curved pipe section of the rising pipe of the kiln immediately after charging the coal; Communicating with the bent pipe connecting pipe of the rising pipe of the kiln where the pressure in the adjacent carbonizing chamber is becoming negative. Then, the shutoff valve of the connecting pipe is opened and communicated for a predetermined time, and a part of the gas generated from the furnace immediately after charging into the kiln where the pressure in the adjacent carbonizing chamber is becoming negative is allowed to flow into the coke oven carbonization. A technique for controlling the pressure in the furnace in the chamber has been proposed (Patent Document 3). According to this technique, it is possible to prevent gas leakage from the carbonization chamber, black smoke from the chimney, and deterioration of the carbonization chamber wall brick.
[0005]
Further, a conventional chamber coke oven generated gas suction control mechanism for performing water sealing and pressure control by a water sealing valve provided at the bent pipe base of the rising pipe will be described with reference to FIG.
As shown in FIG. 3, this chamber type coke oven generated gas suction control mechanism has a riser portion 3 connected to the upper space 2 of the carbonization chamber of the furnace top deck 1, and an upper lid at the upper end of the riser portion 3. 4 is attached, a curved pipe portion 5 of the rising pipe extends downward from the vicinity of the upper lid 4, and the lower end of the curved pipe portion 5 is connected to the dry main 7. In the dry main 7, a water seal valve 32 that is rotatably supported by a water seal valve shaft 31 is provided. And the lower end of the curved pipe part 5 can be sealed with a water seal valve 32.
[0006]
Further, the curved pipe portion 5 of the rising pipe is provided with a curved pipe watering nozzle 21 for flushing the inside of the curved pipe portion 5 and a high / low pressure watering nozzle 26 for generating a negative pressure in the rising pipe. Yes. Further, the low pressure water supply pipe 23 for supplying the low pressure water supply to the curved pipe watering nozzle 21 is provided with a curved pipe watering adjustment valve 24 for supplying high pressure low water to the high / low pressure water spray nozzle 26. The high pressure safe water supply pipe 27 is provided with a high pressure safe water regulating valve 28. Further, the low-pressure safe water supply pipe 23 and the high-pressure safe water supply pipe 27 are connected, and a three-way valve 29 is provided at the connecting portion between the low-pressure safe water supply pipe 23 and the high-pressure safe water supply pipe. A low-pressure safe water adjustment valve 30 is provided between the cold water supply pipe 23 and the high-pressure safe water supply pipe 27.
[0007]
In this chamber type coke oven generated gas suction control mechanism, in the process from coal charging to the end of dry distillation, the water seal valve 32 is rotated downward to bend the curved pipe portion 5 of the rising pipe and the dry main 7. And a high pressure low pressure water spray from the high / low pressure water spray nozzle 26 into the curved pipe portion 5 to create a negative pressure in the ascending pipe, and the coke oven generated gas is sucked and discharged into the dry main 7. .
Further, after the dry distillation, the water seal valve 32 is rotated upward to store the water in the water seal valve 32 so that the bent pipe portion 5 of the riser pipe and the dry main 7 are shut off. .
The water seal depth H1 of the conventional water seal valve 32 was about 100 mm.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 06-41537 [Patent Document 2]
Japanese Patent Laid-Open No. 11-349955 [Patent Document 3]
Japanese Patent Application Laid-Open No. 06-100866
[Problems to be solved by the invention]
However, in the conventional chamber coke oven generated gas suction control mechanism shown in FIG. 3, the tip of the curved pipe portion is opened to a dry main having a larger cross-sectional area compared to the curved pipe portion. In the pressure control based on the opening of the valve, appropriate pressure control could not be performed. In addition, the water seal valve employed in the conventional suction mechanism has a limited size, so that the height of the water seal is limited to 100 mm at most, and the pressure range that can be shut off is narrow.
In the technique described in Patent Document 1, the control gas pressure is set in the gas passage at the bottom of the furnace lid, and when the furnace lid is removed, the gas pressure probe is attached or the pressure radio transmitter is attached. There is a problem that the apparatus configuration becomes complicated. At the same time, if the pressure control is performed based on the opening degree of the control damper of the curved pipe portion, as described above, appropriate pressure control cannot be performed. Furthermore, it is disadvantageous in terms of energy to adjust the suction pressure by the amount of high-pressure safe water and the amount of steam in the bent pipe portion.
[0010]
Moreover, in the technique described in Patent Document 2, it is necessary to prepare a plurality of pressure level pipes in order to perform the suction pressure control by the water spray pressure and the water spray amount of the curved pipe portion. In addition, the watering pressure must be selected according to the gas pressure change in the carbonization chamber. For this reason, not only the apparatus configuration becomes complicated, but also in terms of energy, as in the technique described in Patent Document 1.
Moreover, in the technique described in Patent Document 3, since the coke oven generated gas in the initial charging process is sucked from the charging time using the suction pressure generated in the rising pipe of the adjacent kiln, the fine pressure is There was a problem that control could not be performed and stable pressure control could not be performed.
[0011]
The present invention has been proposed in view of the problems of the above-described conventional technology, and appropriately controls the internal pressure of the riser pipe from the carbonization chamber to the dry main, and improves the sealing performance of the carbonization chamber, It is another object of the present invention to provide a chamber coke oven generated gas suction control mechanism that is more energy efficient.
[0012]
[Means for Solving the Problems]
<Features>
The chamber coke oven generated gas suction control mechanism according to the present invention has the following features in order to achieve the above-described object.
That is, the suction control mechanism of the chamber coke oven generated gas according to the present invention is a generated gas suction control mechanism in the chamber coke oven that discharges the coke oven gas generated from the carbonization chamber to the dry main through the riser pipe. A pressure control valve is provided between the curved pipe portion of the riser pipe and the dry main connection pipe, and a pressure detector for detecting the pressure of the coke oven generated gas is provided in the vertical pipe portion of the riser pipe, The pressure control valve is controlled based on the detection output of the pressure detector to control the pressure in the ascending pipe, and a water seal box is provided in the dry main, and the lower end of the dry main connection pipe is in the water seal box In the dry main connecting pipe, a first water seal level meter and a first level transmitter, a second water seal level meter and a second level transmitter are provided in this order from the top, and a water seal is further provided. Bo Within the scan, the so as to be positioned below the lower end of the dry main connection pipe, the third water seal level meter and third level transmitter is provided in a lower portion of the water seal box, water seal adjustment valve A water drainage pipe is connected in communication with each other, and the water level control in the water seal box is performed by controlling the water seal adjustment valve based on the detection signal from the level transmitter.
In the coke oven generated gas suction control mechanism, the pressure control valve controls the pressure in the ascending pipe and adjusts the water level of the water seal valve until the dry distillation is completed from coal charging. In the process, the curved pipe portion of the riser pipe and the dry main are in communication with each other, and the curved pipe part of the riser pipe and the dry main are shut off after the end of dry distillation.
[0013]
<Action>
In the coke oven generated gas suction control mechanism according to the present invention, the pressure control valve controls the pressure in the riser pipe, and adjusts the water level of the water seal valve, thereby controlling the communication and blocking of the riser pipe with the curved pipe section. To do. For this reason, while being able to perform fine pressure control, the sealing performance of the carbonization chamber can be improved by the water sealing action of the water sealing valve. In addition, the apparatus configuration can be simplified and energy saving can be achieved.
In the coke oven generated gas suction control mechanism according to the present invention, the pressure at the riser base is detected by a pressure detector provided at the riser of the riser, and the pressure regulating valve is controlled based on the detected output. Control the pressure in the riser. For this reason, finer pressure control can be performed.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, based on the specific Example shown in drawing, embodiment of the suction mechanism of the chamber type coke oven generated gas which concerns on this invention is described.
<Example 1>
1 is a configuration diagram illustrating a coke oven generated gas suction control mechanism according to a first embodiment of the present invention.
As shown in FIG. 1, the suction control mechanism for the chamber coke oven generated gas according to the first embodiment has a riser portion 3 of the riser pipe connected to the upper space 2 of the carbonization chamber of the furnace top deck 1. The upper cover 4 is attached to the upper end of the upper cover 4, and the bent pipe portion 5 of the rising pipe extends downward from the vicinity of the upper cover 4, and the lower end of the bent pipe portion 5 is connected to the dry main 7 by the dry main connection pipe 6. Yes. Further, a pressure control valve 8 is provided between the curved pipe portion 5 and the dry main connection pipe 6.
A water seal box 9 is provided in the dry main 7, and the lower end of the dry main connection pipe 6 is inserted into the water seal box 9.
[0015]
In the dry main connection pipe 6 inserted in the water seal box 9, a first water seal level meter 10 and a first level transmitter 11, a second water seal level meter 12 and a second level transmitter are sequentially arranged from above. 13, and a third water seal level meter 14 and a third level transmitter 15 are provided in the water seal box 9 so as to be positioned below the lower end of the dry main connection pipe 6. It has been. In addition, a safety water discharge pipe 17 is connected to the lower part of the water seal box 9 through a water seal adjustment valve 16.
The first level transmitter 11, the second level transmitter 13, and the third level transmitter 15 are connected to the water seal adjustment valve 16, and are based on detection signals from the respective level transmitters 11, 13, 15. By controlling the water seal adjustment valve 16, the water level in the water seal box 9 is controlled.
[0016]
A pressure transmitter fixed short tube 18 is provided in the vicinity of the base portion of the vertical tube portion 3, and a pressure gauge 19 and a pressure transmitter for detecting the pressure of the coke oven generated gas are connected to the pressure transmitter fixed short tube 18. A vessel 20 is attached. The pressure transmitter 20 is connected to the pressure control valve 8 and controls the pressure control valve 8 based on the detection signal from the pressure detector 20 to control the pressure in the ascending pipe.
The height of the dry main 7 is set to about 1000 mm to 1500 mm, and the first water seal level meter 10 is provided at a position about 500 mm above the lower end of the dry main connecting pipe 6 (indicated by H1 in FIG. 1). The distance between the first water seal level meter 10 and the third water seal level meter 14 is set to about 700 mm (indicated by H2 in FIG. 1).
[0017]
A curved pipe watering nozzle 21 for flushing the inside of the curved pipe part 5 is provided at the upper part of the curved pipe part 5, and a dry main watering for flushing the inside of the dry main 7 is provided above the dry main 7. A nozzle 22 is provided. Further, the low pressure water supply pipe 23 for supplying the low pressure water supply to the curved pipe water spray nozzle 21 is provided with a curved pipe water supply adjustment valve 24 for supplying the low pressure water supply to the dry main water spray nozzle 22. The low-pressure water supply pipe 23 is provided with a dry main watering adjustment valve 25.
Although not shown, a wind exhaust device is connected to the subsequent stage of the dry main 7.
[0018]
In this chamber type coke oven generated gas suction control mechanism, in the process from the coal charging to the end of dry distillation, the water is discharged to the position of the third water seal level meter 14 in the water seal box 9 and rises. The bent pipe portion 5 of the pipe and the dry main 7 are brought into communication. A suction pressure is applied to the dry main 7 from the exhaust device, and the coke oven generated gas is sucked from the rising pipe and discharged into the dry main 7.
[0019]
In addition, after the end of dry distillation, the water is stored up to the position of the first water seal level meter 10 in the water seal box 9, and the bent pipe portion 5 of the riser pipe and the dry main 7 are shut off. In the chamber type coke oven generated gas suction control mechanism according to the first embodiment, the water sealing depth, which was about 100 mm in the past, has been expanded to about 500 mm, so that the riser and the carbonization chamber are securely sealed. can do.
[0020]
<Example 2>
Next, a coke oven generated gas suction control mechanism according to Embodiment 1 of the present invention will be described. FIG. 2 is a configuration diagram illustrating a coke oven generated gas suction control mechanism according to the first embodiment of the present invention.
The coke oven generated gas suction control mechanism according to the second embodiment has substantially the same configuration as the coke oven generated gas suction control mechanism according to the first embodiment described above. The difference is that the nozzle 26 is provided. Therefore, parts having the same functions as those in the first embodiment shown in FIG.
As described above, the suction control mechanism of the coke oven generated gas according to the second embodiment is a curved pipe watering nozzle for flushing the curved pipe section 5 to the curved pipe section 5 of the rising pipe as shown in FIG. 21 and a high / low pressure sprinkling nozzle 26 for creating a negative pressure in the riser.
[0021]
Further, the low pressure water supply pipe 23 for supplying the low pressure water supply to the curved pipe watering nozzle 21 is provided with a curved pipe watering adjustment valve 24 for supplying high pressure low water to the high / low pressure water spray nozzle 26. The high pressure safe water supply pipe 27 is provided with a high pressure safe water regulating valve 28. Furthermore, the low-pressure safe water supply pipe 23 and the high-pressure safe water supply pipe 27 are connected, and a three-way valve 29 is provided at the connecting portion between the low-pressure safe water supply pipe 23 and the high-pressure safe water supply pipe 27. A low-pressure safe water adjustment valve 30 is provided between the low-pressure safe water supply pipe 23 and the high-pressure safe water supply pipe 27.
Other configurations are the same as those in the coke oven generated gas suction control mechanism according to the first embodiment.
[0022]
In the coke oven generated gas suction control mechanism according to the second embodiment, in the process from coal charging to the end of dry distillation, the water is discharged to the position of the third water seal level meter 14 in the water seal box 9. The bent pipe portion 5 of the rising pipe and the dry main 7 are brought into communication. Further, in a predetermined period immediately after charging the coal, high-pressure low-pressure water is blown out from the high / low-pressure water spray nozzle 26 into the curved pipe portion 5 to perform suction. Thereafter, the high-pressure dewatering is terminated, and the coke oven generated gas is sucked from the ascending pipe and discharged into the dry main 7 by the suction pressure from the exhaust device.
[0023]
In addition, after the end of dry distillation, the water is stored up to the position of the first water seal level meter 10 in the water seal box 9, and the bent pipe portion 5 of the riser pipe and the dry main 7 are shut off. In the chamber-type coke oven generated gas suction control mechanism according to the second embodiment, the water-sealing depth that has been about 100 mm in the related art is the same as the chamber-type coke oven generated gas suction control mechanism according to the first embodiment described above. It is enlarged to about 500 mm, and the riser and the carbonization chamber can be reliably sealed with water.
[0024]
Further, in the suction control mechanism for the gas generated from the coke oven according to the second embodiment, the apparatus configuration is not changed significantly compared to the conventional apparatus having the suction mechanism at the time of charging with high-pressure water or steam. In addition to being able to apply the invention, it is possible to enjoy both the exhaust effect of the latter stage of the first embodiment and the suction effect by the high pressure water-resistant ejector.
[0025]
【The invention's effect】
In the coke oven generated gas suction control mechanism according to the present invention, the pressure control valve controls the pressure in the riser pipe, and adjusts the water level of the water seal valve, thereby controlling the communication and blocking of the riser pipe with the curved pipe section. can do.
Therefore, fine pressure control can be performed according to fluctuations in the amount of gas generated in the carbonization chamber and fluctuations in pressure from the time of coal charging to the end of the dry distillation without using a complicated apparatus configuration. Thereby, it becomes possible to suppress the gas leak from a furnace lid or a riser to the minimum.
[0026]
In addition, the water sealing action of the water sealing valve is improved, and the sealing property of the carbonization chamber can be improved, which is particularly effective when a technique for increasing the pressure in the carbonization chamber such as preheating coal charging is implemented. .
In the coke oven generated gas suction control mechanism according to the present invention, the pressure at the riser base is detected by a pressure detector provided at the riser of the riser, and the pressure regulating valve is controlled based on the detected output. Thus, the pressure in the riser can be controlled.
Therefore, it becomes possible to perform finer pressure control, and it is also possible to use the suction force of the air exhaust device disposed in the subsequent stage of the dry main, thereby achieving energy saving and the device configuration. It becomes possible to simplify.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a coke oven generated gas suction control mechanism according to Embodiment 1 of the present invention.
FIG. 2 is a block diagram showing a coke oven generated gas suction control mechanism according to Embodiment 2 of the present invention.
FIG. 3 is a configuration diagram showing a conventional coke oven generated gas suction control mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Furnace top deck 2 Coking chamber upper space 3 Stand pipe part 4 Upper cover 5 Curved pipe part 6 Dry main connection pipe 7 Dry main 8 Pressure control valve 9 Water seal box 10 First water seal level meter 11 First level transmitter 12 2 Water seal level meter 13 Second level transmitter 14 Third water seal level meter 15 Third level transmitter 16 Water seal adjustment valve 17 Water discharge pipe 18 Pressure transmitter fixed short tube 19 Pressure gauge 20 Pressure transmitter 21 Pipe water nozzle 22 Dry main water nozzle 23 Low pressure water supply pipe 24 Curved pipe water supply adjustment valve 25 Dry main water supply adjustment valve 26 High / low pressure water supply nozzle 27 High pressure water supply pipe 28 High pressure water supply adjustment valve 29 Three-way valve 30 Low pressure Water adjustment valve 31 Water seal valve shaft 32 Water seal valve

Claims (2)

A generated gas suction control mechanism in a chamber type coke oven that discharges coke oven gas generated from a carbonization chamber to a dry main through a riser pipe, and a pressure between the bent pipe portion of the riser pipe and the dry main connection pipe A control valve is provided, and a pressure detector for detecting the pressure of the coke oven generated gas is provided in the rising pipe portion of the riser pipe, and the pressure adjustment valve is controlled based on the detection output of the pressure detector, performs pressure control riser, the provided water seal box in a dry main, the lower end of the dry main connection pipe is inserted into the water seal box, the the dry main connection pipe, in order from the top, first A water seal level meter and a first level transmitter, a second water seal level meter and a second level transmitter are provided, and further located in the water seal box below the lower end of the dry main connection pipe. Yo To it, a third water seal level meter and third level transmitter is provided in the lower portion of the water seal box, via a water seal adjustment valve From water drainage pipe is connected communicate, detection from the level transmitter A coke oven generated gas suction control mechanism, wherein the water level in the water ring box is controlled by controlling the water ring adjustment valve based on the signal.   The pressure control valve controls the pressure in the riser and adjusts the water level of the water seal valve to adjust the water level of the water seal valve to the end of dry distillation from coal charging and the riser curved portion and the dry main 2. A suction control mechanism for a gas generated in a coke oven according to claim 1, wherein the bent pipe portion of the ascending pipe and the dry main are shut off after completion of dry distillation.

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