JP5092845B2 - Chamber furnace coke oven and method of operating the same - Google Patents

Description

  The present invention relates to a method of operating a chamber-type coke oven and a chamber-type coke oven when sucking generated gas generated when charging coal into a carbonization chamber.

  In the chamber furnace type coke oven, a large number of carbonization chambers and combustion chambers are alternately arranged, and coal charged in the carbonization chamber is dry-distilled at a high temperature to produce coke. FIG. 7 shows a cross-sectional view of the coke oven carbonization chamber. Coke oven gas generated during coke dry distillation is discharged from the riser 6 provided in the ceiling portion of the carbonization chamber 2. Gas is discharged from the ascending pipe 6 of each carbonization chamber through the bend portion 7 to the dry main 8 which is a collecting pipe. Low-pressure water or high-pressure water is injected from the injection nozzle into the bend portion 7 and the coke oven gas is sucked by the ejector effect of the water injection. As a system of water sprayed from the bend unit 7, low-pressure water is provided as low-pressure water, and high-pressure water is provided as high-pressure water. Since the amount of coke oven gas generated is relatively small during coal carbonization, low pressure water is injected from the bend section to suck the coke oven gas.

  The raw coal is transported to the upper part of the carbonization chamber by the charcoal vehicle 5 and charged from the charging port 4 provided in the ceiling portion of the carbonization chamber 2. When coal is charged into the carbonization chamber in a high temperature state, the volatile components contained in the coal are rapidly volatilized and a large amount of gas is generated. When charging coal, the water sprayed from the spray nozzle of the bend is switched from low-pressure water to high-pressure water to increase the gas suction amount. However, even if high-pressure water is injected, a large amount of gas generated at the time of coal charging cannot be sucked only by gas suction from the ascending pipe. In a conventional coke oven, gas is sucked by a coal-collected car dust collector 34 provided in the coal-equipped car 5, and is generated at the time of coal charging by gas suction from the riser 6 and gas suction by the charcoal-car dust collector 34. Gas was sucked.

  In recent years, carbonization chamber 2 in which coal is charged (hereinafter also referred to as “charging furnace 21”) and the adjacent carbonization chamber (hereinafter also referred to as “adjacent kiln 22”) cooperate to generate in charging furnace 21. A method of sucking a large amount of gas only into the dry main 8 via the riser pipes of both the charging furnace 21 and the adjacent furnace 22 has begun to be adopted. For example, it is described in Non-Patent Document 1 and Non-Patent Document 2.

  A vertical pipe that penetrates through the ceiling 23 of each carbonization chamber and protrudes onto the coke oven furnace is provided. As shown in FIG. 5, hereinafter, this vertical pipe is referred to as a “mini stand pipe 11”. A jumper pipe 13 capable of communicating between two mini stand pipes of adjacent carbonizing chambers is provided. When charging coal into one carbonization chamber among many carbonization chambers, between the mini standpipe of the carbonization chamber (charging furnace 21) and the mini standpipe of the carbonization chamber (adjacent kiln 22) connected thereto Is communicated with a jumper pipe 13. Thereby, the charging furnace 21 and the adjacent furnace 22 communicate with each other through the jumper pipe 13. And both the carbonization chambers of the charging furnace 21 and the adjacent furnace 22 inject high-pressure water from the bend portion 7 to increase the gas suction amount. As a result, a large amount of gas generated at the time of charging coal into the charging kiln can be supplied from both the charging kiln and the adjacent kiln without installing a coal-collecting car dust collector in the charcoal car as in the past. After that, it becomes possible to suck and discharge to the dry main.

  6 and 8 show systems for supplying high-pressure water and low-pressure water to each carbonization chamber. Which of the low-pressure water system 19 and the high-pressure water system 18 is supplied to the bend unit 7 connected to each carbonization chamber is selected by operating a three-way valve 26 provided in each carbonization chamber. The operation of the three-way valve is performed according to a command from the switching control device 28.

  In the conventional chamber-type coke oven that does not use a jumper pipe, the high pressure water system 18 is selected for the charging kiln 21 from the start of charging to the end of charging, and other timings and other times. A low pressure water system is selected for the carbonization chamber. FIG. 8 shows the timing of charging coal into the # 6 carbonization chamber.

  In a room furnace type coke oven using a jumper pipe, the high-pressure water system 18 is selected from the charging start of the charging kiln to the end of charging for the charging kiln 21 and the adjacent kiln 22 at that time, and other timings. And the low-pressure water system | strain 19 is selected about a carbonization kiln other than that. FIG. 6 shows a situation where the # 6 carbonization chamber is the charging furnace 21 and the # 7 carbonization chamber is the adjacent furnace 22, and high-pressure water is supplied to both the carbonization chambers. Since high-pressure water is simultaneously supplied to two kilns (a charging kiln and an adjacent kiln), the amount of high-pressure water supply is determined so that the total generated gas of the charging kiln 21 and the adjacent kiln 22 can be sufficiently sucked. The capacity of the high-pressure water supply pump 14 is determined based on such a concept.

W. Wisenhut et.al. "Safety and Health at Work and Environmental Protection at Coke Oven Plants" J. P. Buysschaert "Air Pollution Control Process in Coke Oven Plants"

  A vortex pump is usually used as the high-pressure water supply pump. Such a type of pump has an allowable minimum flow rate, and even when there is no usage destination of high-pressure water, it is required to keep the allowable minimum flow rate or higher. If this pump is operated at a flow rate lower than the allowable minimum flow rate, pump vibration and temperature rise of the bearing portion occur at the initial stage of operation, and if this is continued for a long period of time, pump failure will occur. In the conventional high pressure water supply system in the chamber furnace coke oven, as shown in FIG. 8, a pressure gauge 29 and an on / off valve 27 are provided on the outlet side of the high pressure water supply pump 14. When the on / off valve 27 is opened, the high pressure water is bypassed to the dry main 8 or the like through the on / off valve 27 from the outlet side of the high pressure water supply pump. When the measurement result of the pressure gauge 29 indicates a pressure higher than the predetermined pressure, it is determined that the supply of high-pressure water to the carbonization chamber has been stopped, and the on / off valve 27 is opened by an instruction from the on / off valve control device 30, and the allowable minimum A flow rate or higher is bypassed to the dry main 8. When the measurement result of the pressure gauge 29 is lower than the required pressure, it is determined that the supply of high-pressure water to the carbonization chamber has been resumed, and the on / off valve 27 is closed.

  The transition of the high-pressure water flow rate in the control of high-pressure water as described above is shown in FIG. The time transition of the high-pressure water flow rate for the carbonization chamber, the on-off valve high-pressure water flow rate in the interruption, and the total high-pressure water flow rate in the lower row are shown in the upper part of FIG. The high-pressure water flow rate for the carbonization chamber changes from 1 furnace → 0 furnace → 1 furnace. When changing from 1 furnace to 0 furnace, the ON / OFF valve is opened and high pressure water through the ON / OFF valve begins to flow, but the total high pressure water flow is zero at the moment when the carbonization chamber is changed from 1 furnace to 0 furnace. It has become. In this way, there is a moment when the supply of high-pressure water is zero, and there is a moment when the supply of high-pressure water is zero until there is no supply of high-pressure water to the carbonization chamber, until the on-off valve is opened. Water hammer will lead to deterioration of piping and valves. Further, since the flow rate is lower than the allowable minimum flow rate of the pump until the ON / OFF valve is opened and the flow rate becomes the allowable minimum flow rate, it may cause a failure of the pump.

  The present invention prevents a situation in which the supply amount from the high-pressure water supply pump becomes zero in the high-pressure water supply system of the chamber furnace type coke oven, and prevents the failure of the pump and the deterioration of piping and valves due to the water hammer. The first purpose.

  When charging coal into the carbonization chamber, first, the lid of the carbonization chamber inlet is removed, and the coal is supplied from the coal loading vehicle stopped at the position of the charging port via each inlet. When the charging of coal is completed, a lid is put on the inlet, and the lid of the inlet is sealed. The charging lid sealing is performed using a charging lid sealing device. In the conventional charging lid sealing method, the charging lid sealing is performed together with the completion of the charging of the coal. Therefore, the charging lid sealing device is also installed in the vicinity of the coal charging device of the charcoal vehicle. For this reason, the charging lid sealing device is exposed to a high temperature during coal charging, and the pipe provided in the charging lid sealing device is fixed, and the charging lid sealing cannot be performed.

  A second object of the present invention is to provide a chamber-type coke oven and a method of operating the same that can perform charging lid sealing without causing pipe pipes to stick.

That is, the gist of the present invention is as follows.
(1) A method of operating a chamber-type coke oven in which a plurality of coking chambers 2 are arranged in parallel, and the coke oven generated gas is discharged from each of the coking chambers via the riser 6 to the dry main 8. High-pressure water can be injected from the injection nozzle 9 provided in the riser bend section 7 of the chamber, and the high-pressure water supply pump 14 for the high-pressure water injection has the ability to supply high-pressure water simultaneously to the three carbonization chambers. The allowable minimum flow rate of the high-pressure water supply pump 14 is larger than the flow rate of high-pressure water supplied to the first carbonization chamber, and a flow meter 16 for measuring the flow rate of the supplied high-pressure water is provided downstream of the high-pressure water supply pump. In addition, the flow rate adjusting valve 20 capable of releasing high pressure water is provided, and the opening degree of the flow rate adjusting valve 20 is adjusted so that the high pressure water flow rate measured by the flow meter 16 is not less than the allowable minimum flow rate. Operation of a furnace-type coke oven Law.
(2) The charcoal chamber 2 has a coal loading vehicle 5 for charging coal, the charcoal vehicle 5 has a charging lid sealing device 24 for the carbonization chamber 2, and the charging lid sealing device 24 is carbonized for charging coal. It is possible to seal the charging lid 10 of a carbonizing chamber (hereinafter referred to as “seal kiln 23”) different from the chamber (hereinafter referred to as “charging furnace 21”). When the coal charging is completed, the carbonization chamber subsequently becomes a seal kiln 23 to seal the charging lid 10, and when charging the coal into the charging kiln 21, the charging kiln 21 and another carbonization adjacent to it. The chambers (hereinafter referred to as “adjacent kilns 22”) communicate with each other, the charging kiln 21 starts high-pressure water injection from the start of coal charging, and the carbonizing chamber is subsequently charged as a seal kiln 23. High pressure water injection is continued until the lid seal is completed, and charging of coal to the charging kiln 21 is started for the adjacent kiln 22. The method of operating chamber furnace-type coke oven according to the above (1), characterized in that injecting the high-pressure water to et terminated.
(3) A chamber-type coke oven in which a plurality of coking chambers 2 are arranged in parallel and discharge coke oven generated gas from the respective coking chambers to the dry mains 8 via the riser pipe 6. The pipe bend section 7 has an injection nozzle 9 capable of injecting high-pressure water, a high-pressure water supply pump 14 for the high-pressure water injection, and a switching control device 28 for switching on / off of the high-pressure water injection of each carbonization chamber. The high-pressure water supply pump 14 has the ability to supply high-pressure water to the three carbonization chambers at the same time. On the downstream side of the high-pressure water supply pump 14, the flow meter 16 that measures the flow rate of the high-pressure water to be supplied, and the flow rate adjustment valve 20 and the flow rate adjustment device 17 that can release the high-pressure water are provided. The flow meter 16 As high-pressure water flow rate measured is not between the minimum acceptable flow rate below the chamber furnace-type coke oven, which comprises adjusting the opening of flow control valve 20.
(4) The carbonization chamber 2 has a coal loading vehicle 5 for charging coal, the coal loading vehicle 5 has a charging chamber sealing lid 24 for the carbonization chamber, and the charging lid sealing device 24 is a carbonization chamber for charging coal. It is possible to seal the charging lid 10 of a carbonization chamber (hereinafter referred to as “seal kiln 23”) different from (hereinafter referred to as “charging furnace 21”), and a certain carbonizing chamber becomes the charging furnace 21. When the coal charging is completed, the carbonization chamber subsequently becomes a seal kiln 23 and can seal the charging lid 10. When charging the coal into the charging kiln 21, the charging kiln 21 and another adjacent to it are separated. The carbonization chamber (hereinafter referred to as “adjacent kiln 22”) has a jumper pipe 13 communicating therewith, and the switching control device 28 starts high-pressure water injection from the start of coal charging for the charging kiln 21, The carbonization chamber will continue to become a seal kiln 23 until high-pressure water is used to complete the charging lid seal Morphism continues, chamber furnace-type coke oven according to the above (3), characterized in that injecting the high-pressure water to the end of the coal charging initiation to Sonyukama 21 for neighboring kiln 22.

  In the present invention, the high-pressure water supply pump 14 has the capability of supplying high-pressure water simultaneously to the three carbonization chambers, and the allowable minimum flow rate of the high-pressure water supply pump 14 is larger than the flow rate of high-pressure water supplied to the one carbonization chamber. The flow meter 16 and the flow rate adjustment valve 20 are provided downstream of the high pressure water supply pump, and the opening degree of the flow rate adjustment valve 20 is adjusted so that the high pressure water flow rate does not fall below the allowable minimum flow rate. When the high pressure water supply destination is one carbonization chamber, the flow control valve has already opened and the high pressure water has escaped, so when the high pressure water supply carbonization chamber reaches zero, the moment when the high pressure water flow rate becomes zero There is no occurrence of a pump water hammer.

  The present invention is directed to a plurality of carbonization chambers 2 arranged in parallel as shown in FIGS. 2 and 5, and coke oven generated gas is supplied from each carbonization chamber to the dry main 8 via the riser 6. It is a chamber furnace type coke oven that discharges. The rising pipe bend portion 7 of each carbonization chamber has an injection nozzle 9 that can inject high-pressure water. As shown in FIG. 1, it has the high pressure water supply pump 14 for the said high pressure water injection, and the switching control apparatus 28 which switches the high pressure water injection on / off of each carbonization chamber. Normally, low-pressure water and high-pressure water are switched and supplied to each injection nozzle, and low-pressure water is supplied when the carbonization chamber is dry distillation and the amount of gas generated is small, and the amount of gas generated is large during coal charging. When high pressure water is supplied. The high-pressure water and the low-pressure water are switched by the three-way valve 26, and the three-way valve 26 is switched by a command from the switching control device 28.

  In the present invention, the high-pressure water supply pump 14 has the capability of supplying high-pressure water simultaneously to the three carbonization chambers, and the allowable minimum flow rate of the high-pressure water supply pump 14 is larger than the flow rate of high-pressure water supplied to the one carbonization chamber. In addition, the flowmeter 16 that measures the flow rate of the high-pressure water to be supplied is provided on the downstream side of the high-pressure water supply pump 14, and the flow rate adjusting valve 20 and the flow rate adjusting device 17 that allow the high-pressure water to escape are the first. Features. The flow rate adjusting device 17 adjusts the opening degree of the flow rate adjusting valve 20 so that the high-pressure water flow rate measured by the flow meter 16 does not fall below the allowable minimum flow rate. When the high-pressure water flow rate measured by the flow meter 16 is larger than the allowable minimum flow rate, the opening degree of the flow rate adjustment valve 20 is set to zero. When the measured high-pressure water flow rate becomes lower than the allowable minimum flow rate, the opening degree of the flow rate adjustment valve 20 is adjusted to control the high-pressure water flow rate to be equal to the allowable minimum flow rate. The flow rate adjusting valve 20 is adjusted by the flow rate adjusting device 17.

  FIG. 4 (a) shows the flow of high pressure water in the present invention.

  When high-pressure water is simultaneously supplied to three carbonization chambers (timing H) or two carbonization chambers (timing I), the flow rate adjustment valve is closed because the flow rate of high-pressure water is higher than the allowable minimum flow rate 32. .

  When the supply destination of high-pressure water is reduced from two carbonization chambers (timing I) to one carbonization chamber (timing J), the flow rate of high-pressure water is less than the allowable minimum flow rate 32. At this time, based on the measurement result of the high pressure water flow rate by the flow meter 16, the flow rate adjustment device 17 increases the opening degree of the flow rate adjustment valve 20, and passes through the flow rate adjustment valve 20 so that the high pressure water flow rate does not fall below the allowable minimum flow rate. Increase high-pressure water flow. As the opening of the flow rate adjustment valve 20 starts from zero and widens, the high-pressure water flow rate increases, and finally the total high-pressure water flow rate stabilizes at an allowable minimum flow rate or a flow rate slightly higher than that. During this time, there is no moment when the high-pressure water flow rate becomes zero, so that the water hammer of the pump does not occur.

  When the supply destination of the high-pressure water is further reduced from one carbonization chamber (timing J) to zero (timing K), the flow rate adjusting device is based on the measurement result of the flow meter 16 as in the case of reducing from two to one. The opening of the flow rate adjusting valve 20 is increased by the action of 17, the high-pressure water flow rate is increased, and the high-pressure water flow rate is finally stabilized at the allowable minimum flow rate or a flow rate slightly higher than that. When the high pressure water supply destination is one carbonization chamber, the flow control valve has already opened and the high pressure water has escaped, so when the high pressure water supply carbonization chamber reaches zero, the moment when the high pressure water flow rate becomes zero There is no occurrence of a pump water hammer.

  In the conventional high-pressure water supply system, when the pressure on the outlet side of the high-pressure water supply pump becomes higher than the specified pressure, the on-off valve is opened to release the high-pressure water. When the number of carbonization chambers to which high-pressure water is supplied increases from a maximum of 1 furnace to a maximum of 3 furnaces, it is difficult to perform a predetermined detection by pressure detection, and even if it can be detected, it should only be used for controlling on / off valves. I could not. Further, the flow rate of the on / off valve when the on / off valve was opened was a constant amount, and the flow rate could not be adjusted. In the present invention, since the flow rate adjusting valve is used, it is possible to accurately detect the timing when the number of high pressure water supply carbonization chambers is changed from 2 furnaces to 1 furnace and from 1 furnace to 0 furnace. Further, the flow rate can be adjusted, and there is no waste of escaping excess high-pressure water exceeding the allowable minimum flow rate from the flow rate adjustment valve.

  In the present invention, as the flow meter, for example, a vortex flow meter or the like can be used. As the flow rate adjusting valve, for example, an Air drive type flow rate adjusting valve or the like can be used. The flow rate adjusting device is preferably adjusted so that the high-pressure water flow rate measured by the flow meter is equal to the allowable minimum flow rate. When high pressure water is supplied to one or less furnaces in the carbonization chamber, the opening degree of the flow rate adjustment valve is adjusted by a command from the flow rate adjustment device, and the high pressure water flow rate measured by the flow meter becomes equal to the allowable minimum flow rate. When high pressure water is supplied to the carbonization chamber 2 furnace or 3 furnace, the opening of the flow rate adjustment valve is closed by the flow rate adjusting device, and the high pressure water flow rate measured by the flow meter is higher than the allowable minimum flow rate.

  After the coal charging from the charging chamber inlet is completed, the charging lid is sealed after the charging lid is attached to the charging port. As described above, since the conventional charging lid seal performs the charging lid seal upon completion of the coal charging, the charging lid seal device is also installed in the vicinity of the coal charging device of the charcoal vehicle. For this reason, the lid sealing device is exposed to the high temperature at the time of charging the coal, and the piping provided in the charging lid sealing device is fixed, so that the charging lid cannot be sealed.

  Preferably, in the present invention, the charging lid seal is not performed immediately after the completion of the coal charging, but the coal charging to the specific carbonization chamber is completed, and the charcoal vehicle receives the coal for the next carbonization chamber, When coal is charged into the next carbonization chamber, the charging lid of the specific carbonization chamber is sealed. Normally, when the carbonization of one carbonization chamber (specific carbonization chamber) is completed, the carbonization chamber for performing the next carbonization is a carbonization chamber separated from the specific carbonization chamber by about 5 kilns. Therefore, the charging lid sealing device for performing the charging lid sealing is also installed on the coal loading vehicle at a distance of 5 kilns from the coal charging device. Therefore, the charging lid sealing device is not exposed to the high temperature at the time of coal charging, and the piping provided in the charging lid sealing device is not fixed. In the example shown in FIG. 2, the # 6 carbonization chamber is the charging furnace 21, and the # 1 carbonization chamber is the seal furnace 23. A coal charging device 25 is disposed immediately above the # 6 carbonization chamber. At this time, the charging lid sealing device 24 is disposed at the position of the # 1 carbonization chamber. For this reason, the distance between the coal charging device 25 and the charging lid sealing device 24 is separated on the charcoal vehicle 5.

  That is, the chamber furnace type coke oven of the present invention has a coal loading vehicle 5 for charging coal into the carbonization chamber, and the coal loading vehicle 5 has a charging lid sealing device 24 for the carbonization chamber, and the charging lid sealing device 24. Can seal the charging lid 10 of a carbonizing chamber (seal kiln 23) different from the carbonizing chamber (charging kiln 21) in which coal is charged. When the charging is completed, the carbonization chamber can subsequently become a seal kiln 23 to seal the charging lid.

  When charging coal into one carbonization chamber (specific carbonization chamber), high-pressure water is supplied from an injection nozzle installed in the bend portion of the carbonization chamber. In the present invention, high-pressure water continues to be supplied even after the coal charging is completed, and the high-pressure water continues to flow until the charging lid seal for the specific carbonizing chamber is completed when the coal is charged into the next carbonizing chamber. Since the high-pressure water injection is continued, the specific carbonization chamber can be maintained in a negative pressure state until the charging lid seal to the specific carbonization chamber is completed, and dust leaks from the charging lid before the charging lid seal. Can be prevented. FIG. 3 is a diagram showing at what timing high-pressure water and low-pressure water are supplied to each carbonization chamber. In FIG. 3, the timings A to D of the # 6 carbonizing chamber correspond to the above case.

  Preferably, in the present invention, a large amount of gas generated in the charging furnace 21 is charged by cooperating the carbonizing chamber 2 (charging furnace 21) for charging coal and the adjacent carbonizing chamber (adjacent furnace 22). A method of sucking only the dry main 8 through the riser pipes of both the kiln 21 and the adjacent kiln 22 is used. As shown in FIG. 5, a vertical pipe (mini stand pipe 11) that penetrates the ceiling portion of each carbonization chamber and protrudes onto the coke oven furnace is provided. A jumper pipe 13 capable of communicating between two mini stand pipes of adjacent carbonizing chambers is provided. When charging coal into one carbonization chamber among many carbonization chambers, between the mini standpipe of the carbonization chamber (charging furnace 21) and the mini standpipe of the carbonization chamber (adjacent kiln 22) connected thereto Is communicated with a jumper pipe 13. Thereby, the charging furnace 21 and the adjacent furnace 22 communicate with each other through the jumper pipe 13. And both the carbonization chambers of the charging furnace 21 and the adjacent furnace 22 inject high-pressure water from the bend portion 7 to increase the gas suction amount. As a result, a large amount of gas generated at the time of charging coal into the charging kiln can be supplied from both the charging kiln and the adjacent kiln without installing a coal-collecting car dust collector in the charcoal car as in the past. After that, it becomes possible to suck and discharge to the dry main. For the mini stand pipe 11 not provided with the jumper pipe 13, a lid 12 is installed at the tip.

  In the present invention, as described above, the charging kiln 21 is supplied with high-pressure water from the start of coal charging in the charging kiln, the coal charging into the charging kiln is completed, and the carbonization chamber becomes a seal kiln. 23, and high-pressure water continues to flow until the charging lid seal of the seal kiln 23 is completed. On the other hand, for the adjacent kiln 22, high-pressure water supply is started at the start of coal charging into the charging kiln 21, and supply of high-pressure water is stopped when coal charging into the charging kiln 21 is completed. Switch to supply. FIG. 1 shows that the # 6 carbonization chamber is the charging furnace 21, the # 7 carbonization chamber is the adjacent furnace 22, the # 1 carbonization chamber is the seal furnace 23, and the # 6, # 7, and # 1 carbonization chambers are supplied with high-pressure water. It is a figure which shows the water supply system of the time (timing A of FIG. 3) which is supplying water.

  Here, a case where the present invention is applied to a chamber-type coke oven having carbonization chambers # 1 to # 65 will be described.

  For example, the # 1 carbonization chamber is the first charging kiln, and after the coal charging to the first charging kiln is completed, the # 6 carbonization chamber is the second charging kiln and the coal charging is performed. To do. When the charging of coal into the # 1 carbonization chamber is completed, the coal loading vehicle returns to the position of the coal tower and receives coal. In the # 1 carbonization chamber, high-pressure water is supplied from the start of coal charging, and the high-pressure water supply is continued even after coal charging is completed.

  Next, the charcoal vehicle 5 moves so that the coal charging device 25 is positioned at the # 6 carbonization chamber (FIGS. 2 and 5 (c)). Here, a jumper pipe 13 is installed between the # 6 carbonization chamber and the # 7 carbonization chamber, and the # 6 carbonization chamber and the # 7 carbonization chamber are connected (FIG. 5B). Here, the high pressure water supply to the # 6 carbonization chamber and the # 7 carbonization chamber is started (timing A in FIG. 3), and the coal charging to the # 6 carbonization chamber is started (high pressure water 3 furnace supply (# 1, 6). 7)). At the same time, the charging lid seal of the # 1 carbonization chamber is performed using the charging lid sealing device 24 of FIG. After the charging lid seal is completed, the high pressure water supply to the # 1 carbonization chamber is terminated and switched to low pressure water (timing B in FIG. 3) (high pressure water 2 furnace supply (# 6, 7)).

  After finishing charging coal into the # 6 carbonization chamber, the jumper pipe is removed and the charcoal vehicle returns to the position of the coal tower. The high pressure water supply to the # 6 carbonization chamber continues, but the high pressure water supply is stopped and switched to the low pressure water supply for the # 7 carbonization chamber (timing C in FIG. 3) (high pressure water 1 furnace supply (# 6)) .

  When the car is loaded into the next # 11 carbonization chamber, the charging lid seal of the # 6 carbonization chamber is performed. When coal is charged into the # 11 carbonization chamber, high pressure water supply is started to the # 11 carbonization chamber (charging furnace) and the # 12 carbonization chamber (adjacent kiln) (timing D in FIG. 3) (high pressure water 3 furnace supply (# 6, 11, 12)). On the other hand, when the charging lid seal of the # 6 carbonization chamber is completed, the high pressure water supply to the # 6 carbonization chamber is switched to low pressure water (high pressure water 2 furnace supply (timing E in FIG. 3) (# 11, 12)).

  As described above, the supply of high-pressure water to the carbonization chamber changes in the order of 3 furnaces → 2 furnaces → 1 furnace → 3 furnaces → 2 furnaces → 1 furnace → 3 furnaces, and this transition is repeated thereafter. As shown in FIG. 4 (a), the flow rate adjusting valve 20 is closed when supplying 3 furnaces and supplying 2 furnaces, and the flow rate adjusting valve 20 is opened when changing from supplying 2 furnaces to supplying 1 furnace. The flow rate is adjusted so that the entire supply amount becomes the allowable minimum flow rate. When changing from one furnace supply to three furnace supply, the flow control valve 20 is closed. There is no moment when the entire high-pressure water supply becomes zero.

  In this case, the coke oven has up to # 65 carbonization chambers. When the coals are charged in the order of # 1 and # 6 and the # 61 carbonization chamber is charged, the process returns to the original and the # 2 carbonization chamber is charged. After completion of the charring to the # 61 carbonization chamber, the charcoal vehicle is moved to perform the charging lid sealing of the # 61 carbonization chamber. At this time, no coal is added to another carbonization chamber. Then, after completion of the charging lid sealing of the # 61 carbonization chamber, the interblock block is suspended until the start of the charring to the # 2 carbonization chamber. At the time of the # 61 charging lid seal, high pressure water is supplied only to the # 61 carbonization chamber (one furnace supply), and after the charging lid seal is completed, the high pressure water supply to the carbonization chamber becomes zero. However, as shown in the change from timing J to K in FIG. 4A, the flow rate adjustment valve is open when one furnace is supplied. Since the entire water supply amount does not become zero, no water hammer is generated. Until the start of coal charging into the # 2 carbonization chamber, the high-pressure water escapes to the dry main through the flow rate adjustment valve at a flow rate equal to the allowable minimum flow rate.

It is a figure which shows an example of the water supply system in the chamber furnace type coke oven of this invention. It is a fragmentary sectional view of the chamber furnace type coke oven of the present invention. It is a figure which shows the relationship of the high pressure water supply timing of each carbonization chamber of this invention. It is a figure which shows the transition of the high-pressure water supply amount to a carbonization chamber, and the transition of the high-pressure water supply amount via a flow control valve, (a) is an example of this invention, (b) is a comparative example. It is a figure which shows an example of the carbonization chamber of this invention, (a) is sectional drawing, (b) is BB partial sectional drawing, (c) is a figure which shows the condition which raised the jumper pipe of (b). . It is a figure which shows an example of the water supply system in the conventional chamber furnace type coke oven. It is sectional drawing of the conventional chamber furnace type coke oven. It is a figure which shows an example of the water supply system in the conventional chamber furnace type coke oven.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coke oven 2 Coking chamber 3 Combustion chamber 4 Charging inlet 5 Charcoal vehicle 6 Climbing pipe 6a Charging kiln riser pipe 6b Adjacent kiln riser pipe 6c Seal kiln riser pipe 7 Bend part 7a Charging kiln bend part 7b Adjacent kiln bend part 7c Seal Kiln Bend 8 Dry Main 9 Injection Nozzle 10 Lid 11 Mini Stand Pipe 12 Lid 13 Jumper Pipe 14 High Pressure Water Supply Pump 15 Low Pressure Water Supply Pump 16 Flowmeter 17 Flow Control Device 18 High Pressure Water System 19 Low Pressure Water System 20 Flow Rate Adjustment Valve 21 Charging furnace 22 Adjacent kiln 23 Sealing kiln 24 Charging lid sealing device 25 Coal charging device 26 Three-way valve 27 On-off valve 28 Switching control device 29 Pressure gauge 30 On-off valve control device 31 High-pressure water supply pump supply capacity 32 Allowable minimum Flow rate 34 Charcoal collection machine

Claims (4)

An operation method of a chamber-type coke oven in which a plurality of coking chambers are arranged in parallel and discharges coke oven generated gas from each carbonizing chamber to the dry main via the rising tube, and the rising pipe bend portion of each carbonizing chamber High-pressure water can be sprayed from the spray nozzle provided in the
The high-pressure water supply pump for high-pressure water injection has the ability to supply high-pressure water simultaneously to the three carbonization chambers, and the allowable minimum flow rate of the high-pressure water supply pump is higher than the flow rate of high-pressure water supplied to the first carbonization chamber. Many
On the downstream side of the high-pressure water supply pump, it has a flow meter that measures the flow rate of the high-pressure water to be supplied, and a flow rate adjustment valve that can release the high-pressure water,
A method for operating a chamber-type coke oven, wherein the opening degree of the flow rate adjusting valve is adjusted so that the high-pressure water flow rate measured by the flow meter does not become the allowable minimum flow rate or less.   The charcoal chamber has a charcoal vehicle for charging coal, the charcoal vehicle has a charcoal chamber charging lid seal device, and the charging lid seal device is a charcoal chamber for charging coal (hereinafter referred to as “charging kiln”). )), The charging lid of another carbonization chamber (hereinafter referred to as “seal kiln”) can be sealed, and when a certain carbonization chamber becomes a charging kiln and coal charging is completed, Next, it becomes a seal kiln and seals the charging lid. When charging coal into the charging kiln, the charging kiln and another adjacent carbonization chamber (hereinafter referred to as “adjacent kiln”) communicate with each other. For the charging kiln, high-pressure water injection is started from the start of coal charging, the carbonization chamber is subsequently a seal kiln, and high-pressure water injection is continued until the charging lid seal is completed. The high pressure water is jetted from the start to the end of coal charging into the kiln. Scan furnace method of operation. This is a chamber-type coke oven in which a plurality of coking chambers are arranged in parallel, and the coke oven generated gas is discharged from each carbonizing chamber to the dry main via the ascending pipe. An injection nozzle capable of injecting water, a high-pressure water supply pump for high-pressure water injection, and a switching control device for switching on / off of the high-pressure water injection of each carbonization chamber,
The high-pressure water supply pump has the capability of supplying high-pressure water simultaneously to the three carbonization chambers, and the allowable minimum flow rate of the high-pressure water supply pump is larger than the flow rate of high-pressure water supplied to the one carbonization chamber,
On the downstream side of the high-pressure water supply pump, it has a flow meter for measuring the flow rate of the high-pressure water to be supplied, and has a flow rate adjustment valve and a flow rate adjustment device that can release the high-pressure water,
The flow rate adjusting device adjusts the opening of the flow rate adjustment valve so that the high-pressure water flow rate measured by the flow meter does not become the allowable minimum flow rate or less. The charcoal chamber has a charcoal vehicle for charging coal, the charcoal vehicle has a charcoal chamber charging lid seal device, and the charging lid seal device is a charcoal chamber for charging coal (hereinafter referred to as “charging kiln”). )), The charging lid of another carbonization chamber (hereinafter referred to as “seal kiln”) can be sealed, and when a certain carbonization chamber becomes a charging kiln and coal charging is completed, Can then be used as a seal kiln to seal the charging lid, and when charging the coal into the charging kiln, it is between the charging kiln and another adjacent carbonization chamber (hereinafter referred to as the “adjacent kiln”). Has a jumper pipe communicating with
The switching control device starts high-pressure water injection from the start of coal charging for the charging kiln, and continues the high-pressure water injection until the charging lid seal is completed for the carbonization chamber, The chamber furnace type coke oven according to claim 3, wherein high pressure water is injected from the start to the end of coal charging into the charging kiln for the adjacent kiln.

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