System for reducing coke burn-out rate in dry quenching furnace

Abstract

The embodiment of the invention provides a system and method for reducing the coke burn-out rate in a dry quenching furnace, and relates to the technical field of dry quenching furnace production. The system for reducing the coke burn-out rate in the coke dry quenching furnace comprises a coke dry quenching furnace body, an exhaust assembly is arranged on the outer surface of the coke dry quenching furnace body and comprises an exhaust box, the outer surface of the exhaust box is connected with a gas storage box, and through arrangement of the exhaust assembly, the coke burn-out rate of the coke in the coke dry quenching furnace is reduced. Nitrogen can be injected into the dry quenching furnace to neutralize air, so that the content of the air in the dry quenching furnace is reduced, sufficient combustion in the dry quenching furnace is facilitated, the nitrogen can be stored in the gas storage box to serve as pre-stored nitrogen, the time for conveying the nitrogen into the dry quenching furnace is shortened, and the service life of the dry quenching furnace is prolonged. The working progress of neutralizing air by nitrogen is improved, the condition of insufficient combustion in the production process of the dry quenching furnace is avoided, the operation efficiency of the dry quenching furnace is improved, and the dry quenching furnace is convenient to use.

Description

Technical Field

[0001] The present application relates to the technical field of dry quenching coke oven production, and in particular to a system and method for reducing the coke burning rate in a dry quenching coke oven. Background Art

[0002] Traditional coke production uses wet quenching technology, which not only consumes a lot of energy, but also emits a large amount of particulate matter and SO 2 , H 2 S as the main representative of atmospheric pollutants, difficult to treat phenol cyanide water and tar residue and other solid wastes, high energy consumption, high emission production process caused by resource waste and environmental pollution, hindering the rapid development of the coking industry, compared with the traditional production process, dry quenching technology can properly reduce the diffusion pollution generated in the quenching process, effectively control the dust content of the surrounding air, with the advantages of energy saving and environmental protection, but also can improve the production quality of coke, with outstanding application value.

[0003] In the normal production process of CDQ, red coke reacts with oxygen in the air. The oxygen is insufficient, so the air inhaled from the furnace not only causes the coke to burn, but also increases the CO in the gas, which then enters the CDQ furnace and causes the coke to burn. Due to the large amount of coke, it is incompletely burned, so the CO content in the gas is high. 2 , generally the content is 12%-16%, and even reaches more than 20%. When the gas enters the CDQ furnace, it passes through the coke layer with a higher temperature and a carbon dissolution reaction occurs. The final increase in the amount of air introduced is also the cause of the carbon dissolution reaction. Therefore, the air inhaled at the furnace mouth is the main reason for the coke burning. Therefore, we have proposed a system and method for reducing the coke burning rate in the CDQ coke oven, which has easy-to-use functions and is in urgent need of development. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a system and method for reducing the coke burning rate in a dry quenching coke oven, which can avoid the reaction between red coke and oxygen in the air during the normal production process of dry quenching coke. The insufficient oxygen will not only cause the coke to burn, but also increase the CO in the gas, which will enter the dry quenching oven and cause the coke to burn. Due to the large amount of coke, it is not completely burned, so the CO content in the gas is high. The gas contains a certain amount of CO. 2 The general content is 12%-16%, and even reaches more than 20%. When the gas enters the CDQ furnace, it passes through the coke layer with higher temperature and a carbon dissolution reaction occurs. The final increase in air introduction is also the cause of the carbon dissolution reaction. Therefore, the inhalation of air at the furnace mouth is a problem of coke burning.

[0005] This application is implemented as follows:

[0006] The present application provides a system for reducing the coke burning rate in a dry quenching coke oven, comprising a dry quenching coke oven body, an exhaust assembly being arranged on the outer surface of the dry quenching coke oven body, the exhaust assembly comprising an exhaust box, the outer surface of the exhaust box being connected to an air storage box, the inner cavity of the air storage box being rotatably connected to a rotating rod, and the inner cavity of the air storage box being rotatably connected to a round rod.

[0007] According to a system for reducing the coke burnout rate in a dry quenching coke oven according to an embodiment of the present application, a circulating fan is installed on the outer surface of the exhaust box, and an air outlet of the circulating fan is connected to the inner cavity of the exhaust box through an air duct.

[0008] According to a system for reducing the coke burning rate in a dry quenching coke oven in an embodiment of the present application, the outer surface of the exhaust box is connected to an exhaust pipe, and one end of the exhaust pipe is connected to the inner cavity of the dry quenching coke oven body, the outer surface of the gas storage box is connected to a connecting box, and the outer surface of the gas storage box is installed with a first one-way valve.

[0009] According to a system for reducing the coke burning rate in a dry quenching coke oven according to an embodiment of the present application, the air inlet of the first one-way valve is connected to the inner cavity of the air storage box, the inner cavity of the exhaust box is equipped with a second one-way valve, the inner cavity of the connecting box is bolted with a motor, and the output shaft of the motor passes through the inner cavity of the air storage box and is connected to one end of a rotating rod.

[0010] According to a system for reducing the coke burning rate in a dry quenching coke oven according to an embodiment of the present application, one end of the round rod and the outer surface of the rotating rod are respectively connected to two meshing first bevel gears, the top of the round rod is connected to a running plate, the top of the running plate is rotatably connected to a push rod through a bearing, and the inner cavity at the top of the air storage box is slidably connected to a guide plate.

[0011] According to a system for reducing the coke burning rate in a dry quenching coke oven according to an embodiment of the present application, the top end of the push rod is slidably connected to the inner side of a guide plate, and the outer surface of the guide plate is connected to two symmetrically arranged U-shaped rods, and one end of the U-shaped rod away from the guide plate passes through the inner cavity at the bottom of the air storage box and is connected to a pressure plate.

[0012] According to a system for reducing the coke burning rate in a dry quenching coke oven according to an embodiment of the present application, a short rod is rotatably connected to the bottom of the gas storage box, and both sides of the bottom of the gas storage box are connected to limit plates, and moving rods are slidably connected to the opposite sides of the two limit plates, and one end of the moving rod away from the limit plate penetrates into the inner cavity of the gas storage box and is connected to a sealing plate.

[0013] According to a system for reducing the coke burning rate in a dry quenching coke oven according to an embodiment of the present application, the inner cavity of the gas storage box is connected to a connecting pipe in contact with a sealing plate, and one end of the connecting pipe passes through the exhaust box and is connected to a second one-way valve, the outer surface of the movable rod is connected to a tooth plate, the outer surface of the short rod is connected to a gear meshing with the tooth plate, and the bottom of the gas storage box is rotatably connected to a long rod.

[0014] According to a system for reducing the coke burning rate in a dry quenching coke oven according to an embodiment of the present application, one end of the long rod and the bottom end of the short rod are respectively connected to two meshing second bevel gears, one end of the rotating rod passes through the outside of the air storage box, the outer surfaces of the rotating rod and the long rod are respectively connected to two pulleys, and the two pulleys are connected by belt transmission, one side of the tooth plate is rotatably connected to a sliding rod, the outer surface of the sliding rod is sleeved with two symmetrically arranged sliding blocks, and the outer surface of the sliding block is slidably connected to one side of the tooth plate, the opposite sides of the two sliding blocks are connected to a return spring, the outer surface of the sliding block is connected to a mounting plate, the outer surface of the mounting plate is rotatably connected to a positioning plate, and the side of the positioning plate away from the mounting plate is rotatably connected to a tooth plate meshing with the gear.

[0015] The present invention also provides a method for reducing the coke burning rate in a dry quenching coke oven, comprising the following steps:

[0016] 1) Preparation for nitrogen filling: First, calibrate the nitrogen in the gas storage tank through gas online detection instruments and nitrogen flow meters to ensure normal operation. Before nitrogen filling, check the air tightness of the dry quenching furnace and boiler, and conduct a systematic inspection of key equipment to ensure the stable operation of the entire system. The content of each component of the circulating gas is H 2 <3%,CO<8%,O 2 <1%,CO 2 <18%, T6 temperature <980℃, coke discharge temperature <180℃ and other key process parameters are controlled within the index range, and a pressure gauge is installed at the nitrogen filling part before nitrogen filling;

[0017] 2) Implementation stage: During the normal production of the CDQ coke oven body, nitrogen is gradually charged without exiting the air guide. Nitrogen is charged into the CDQ coke oven body. The operation is carried out step by step by opening the nitrogen valves one by one every day. When opening and closing the nitrogen valves, pay attention to slow operation. According to the combustible gas content, the air introduction amount is gradually reduced until the air introduction system is completely withdrawn. When the pressure fluctuation of the pre-storage chamber is large, the nitrogen charging point can be adjusted and the nitrogen is pushed into the CDQ coke oven body through the airflow of the circulating fan. When the air introduction system is completely withdrawn, the nitrogen valve at the air guide is opened. According to the content of each component of the circulating gas and the pressure fluctuation of the pre-storage chamber, the nitrogen charging amount of the air guide and the CDQ coke oven body is adjusted. When the coke discharge temperature is greater than 180°C, the circulating air volume is appropriately adjusted to cool down according to the actual production. The specific start time of this nitrogen charging is subject to the instructions of the dispatching room, and the nitrogen charging cycle is to be determined according to the operation effect;

[0018] 3) Data statistics: record the data of each temperature measuring point before and after nitrogen filling, compare and analyze the temperature changes of each measuring point before and after nitrogen filling, pay special attention to the coke discharge temperature and the internal temperature of the CDQ oven body; record the data of each pressure measuring point before and after nitrogen filling, compare and analyze the pressure changes of each measuring point before and after nitrogen filling, pay special attention to the pressure changes in the pre-storage chamber and the suction of the CDQ oven body; record the CDQ circulating gas component data, compare and analyze the changes in the circulating gas component before and after nitrogen filling; record the steam volume data before and after nitrogen filling, compare and analyze the changes in steam volume before and after nitrogen filling; contact the inspection center to test the carbon content of coke powder before and after nitrogen filling, compare and analyze the changes in the carbon content of coke powder before and after nitrogen filling; record the output and coke powder volume data before and after nitrogen filling, calculate the CDQ coke burnout rate, and compare the changes in burnout data before and after nitrogen filling.

[0019] The beneficial effects of the present invention are as follows: through the arrangement of the exhaust component, nitrogen can be flushed into the dry quenching furnace to neutralize the air, thereby reducing the air content inside the dry quenching furnace, which is helpful for sufficient combustion inside the dry quenching furnace, and specifically through the pressure plate, the nitrogen is accelerated in the reciprocating direction, so that the nitrogen is discharged into the exhaust box through the connecting pipe, and then discharged into the dry quenching coke oven body through the exhaust box, thereby accelerating the work process of nitrogen being discharged into the dry quenching furnace, and the nitrogen can also be stored in the gas storage box as pre-stored nitrogen for use, thereby reducing the nitrogen transportation time to the dry quenching furnace, improving the work progress of nitrogen neutralizing the air, and avoiding the situation of insufficient combustion in the dry quenching furnace during the production process, improving the operation efficiency of the dry quenching furnace, and facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a three-dimensional schematic diagram of the overall structure according to an embodiment of the present application;

[0022] Figure 2 is a three-dimensional schematic diagram of the overall structure of an exhaust assembly according to an embodiment of the present application;

[0023] Figure 3 is a perspective schematic diagram of a side cross-sectional structure of an exhaust box according to an embodiment of the present application;

[0024] Figure 4 is a perspective schematic diagram of a side cross-sectional structure of an installation box according to an embodiment of the present application;

[0025] Figure 5 is a three-dimensional schematic diagram of a motor structure according to an embodiment of the present application;

[0026] Figure 6 is a three-dimensional schematic diagram of a U-shaped rod structure according to an embodiment of the present application;

[0027] Figure 7 is a three-dimensional schematic diagram of a pressure plate structure according to an embodiment of the present application;

[0028] Figure 8 is a three-dimensional schematic diagram of the running plate structure according to an embodiment of the present application;

[0029] Fig. 9 is a three-dimensional schematic diagram of a connecting pipeline structure according to an embodiment of the present application;

[0030] Fig.10 is a three-dimensional schematic diagram of a short rod structure according to an embodiment of the present application;

[0031] Fig.11 According to the embodiment of the present application Fig.10 The enlarged structural diagram at A in the middle;

[0032] Fig.12 It is a schematic three-dimensional diagram of the structure of the second bevel gear according to an embodiment of the present application.

[0033] In the figure: 1, dry quenching coke oven body; 2, exhaust assembly; 21, exhaust box; 22, circulating fan; 23, exhaust duct; 24, air storage box; 25, connecting box; 26, first non-return valve; 27, second non-return valve; 28, motor; 29, rotating rod; 210, round rod; 211, first cone gear; 212, running plate; 213, push rod; 214, guide plate; 215, U-shaped rod; 216, pressing plate; 217, short rod; 218, limit plate; 219, moving rod; 220, sealing plate; 221, connecting duct; 222, tooth plate; 223, gear; 224, long rod; 225, second cone gear; 226, pulley; 227, slide rod; 228, slide block; 229, return spring; 230, mounting plate; 231, positioning plate; 232, tooth plate. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0035] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] Example 1

[0037] A method for reducing the coke burning rate in a dry quenching coke oven comprises the following steps:

[0038] 1) Preparation for nitrogen filling: First, the nitrogen in the gas storage box 24 is calibrated through gas online detection instruments and nitrogen flow meters to ensure normal operation. Before nitrogen filling, the air tightness of the dry quenching furnace and boiler is checked, and a systematic inspection of key equipment is carried out to ensure the stable operation of the entire system. The content of each component of the circulating gas is H 2 <3%,CO<8%,O 2 <1%,CO 2 <18%, T6 temperature <980℃, coke discharge temperature <180℃ and other key process parameters are controlled within the index range, and a pressure gauge is installed at the nitrogen filling part before nitrogen filling;

[0039] 2) Implementation stage: During the normal production of the CDQ coke oven body 1, nitrogen is gradually charged without exiting the air guide. Nitrogen is charged into the CDQ coke oven body 1. The operation is carried out step by step by opening the nitrogen valves one by one every day. When opening and closing the nitrogen valves, it is necessary to proceed slowly. According to the combustible gas content, the air introduction amount is gradually reduced until the air introduction system is completely withdrawn, which takes about 4 days. When the pressure fluctuation of the pre-storage chamber is large, it is outside the process index of -100 to 100Pa. The nitrogen charging point can be adjusted and the nitrogen is pushed into the CDQ coke oven body 1 through the airflow of the circulating fan 22. When the air introduction system is completely withdrawn, the nitrogen valve at the air guide is opened. According to the content of each component of the circulating gas and the pressure fluctuation of the pre-storage chamber, the nitrogen charging amount of the air guide and the CDQ coke oven body 1 is adjusted. When the coke discharge temperature is greater than 180°C, the circulating air volume is appropriately adjusted to cool down according to the actual production. The specific start time of this nitrogen charging is subject to the instructions of the dispatching room, and the nitrogen charging cycle is to be determined according to the operation effect;

[0040] 3) Data statistics, record the data of each temperature measuring point before and after nitrogen filling, compare and analyze the temperature changes of each measuring point before and after nitrogen filling, focus on the coke discharge temperature and the internal temperature of the dry coke quenching oven body 1, record the data of each pressure measuring point before and after nitrogen filling, compare and analyze the pressure changes of each measuring point before and after nitrogen filling, focus on the pressure changes in the pre-storage chamber and the suction of the dry coke quenching oven body 1, record the data of the dry coke quenching circulating gas components, compare and analyze the changes in the circulating gas components before and after nitrogen filling, record the data of the steam volume before and after nitrogen filling, compare and analyze the changes in the steam volume before and after nitrogen filling, contact the inspection center to test the carbon content of coke powder before and after nitrogen filling, compare and analyze the changes in the carbon content of coke powder before and after nitrogen filling, record the output and coke powder volume data before and after nitrogen filling, calculate the dry coke burnout rate, and compare the changes in the burnout data before and after nitrogen filling;

[0041] Example 2

[0042] like Figure 1-Figure 12 As shown, a system for reducing the coke burning rate in a dry quenching coke oven according to an embodiment of the present application comprises a dry quenching coke oven body 1, and an exhaust assembly 2 is arranged on the outer surface of the dry quenching coke oven body 1, wherein when nitrogen is discharged, H 2 The content is controlled within 3%, the CO content is controlled within 8%, and the O 2The content is controlled within 1%, the coke discharge temperature is controlled within 180°C, the coke type is stable, the ratio is not adjusted significantly, the coke oven is in stable operation, and premature coke discharge is strictly prohibited. The exhaust assembly 2 includes an exhaust box 21, and the outer surface of the exhaust box 21 is installed on the outer surface of the dry quenching coke oven body 1 through a welding frame. The outer surface of the exhaust box 21 is connected to the air storage box 24, and the inner cavity of the air storage box 24 is rotatably connected to the rotating rod 29, and the inner cavity of the air storage box 24 is rotatably connected to the round rod 210, wherein the inner cavity of the air storage box 24 is installed with a square plate rotatably connected to the round rod 210 through a bearing, and the outer surface of the exhaust box 21 is installed with a circulating fan 22, wherein the air inlet of the circulating fan 22 can be connected to an external dust removal device, or sealed, such as a shutter. The air outlet of the circulating fan 22 is connected to the inner cavity of the exhaust box 21 through the air duct, the outer surface of the exhaust box 21 is connected to the exhaust duct 23, and one end of the exhaust duct 23 is connected to the inner cavity of the dry quenching coke oven body 1, the outer surface of the air storage box 24 is connected to the connecting box 25, and the outer surface of the air storage box 24 is installed with a first one-way valve 26, wherein the shape of the air storage box 24 is T-shaped, the air inlet of the first one-way valve 26 is connected to the inner cavity of the air storage box 24, and the air outlet of the first one-way valve 26 is connected to a pipeline, and the pipeline is connected to an external nitrogen storage device, so as to facilitate the delivery of nitrogen, the inner cavity of the exhaust box 21 is installed with a second one-way valve 27, and the inner cavity of the connecting box 25 is bolted with a motor 28;

[0043] like Figure 2-Figure 12As shown, the output shaft of the motor 28 passes through the inner cavity of the air storage box 24 and is connected to one end of the rotating rod 29, one end of the round rod 210 and the outer surface of the rotating rod 29 are respectively connected with two meshing first bevel gears 211, the top of the round rod 210 is connected to a running plate 212, the top of the running plate 212 is rotatably connected to a push rod 213 through a bearing, the inner cavity at the top of the air storage box 24 is slidably connected to a guide plate 214, the top of the push rod 213 is slidably connected to the inner side of the guide plate 214, the outer surface of the guide plate 214 is connected to two symmetrically arranged U-shaped rods 215, one end of the U-shaped rod 215 away from the guide plate 214 passes through the inner cavity at the bottom of the air storage box 24 and is connected to a pressure plate 216, wherein the area where the U-shaped rod 215 passes through and contacts the air storage box 24 is sealed, and the bottom of the air storage box 24 rotates. A short rod 217 is connected, and both sides of the bottom of the air storage box 24 are connected to limit plates 218, and the opposite sides of the two limit plates 218 are slidably connected with a moving rod 219, and one end of the moving rod 219 away from the limit plate 218 penetrates into the inner cavity of the air storage box 24 and is connected to a sealing plate 220, wherein the contact area of ​​the moving rod 219 and the limit plate 218 is sealed, and the material of the sealing plate 220 is a sealing material, the inner cavity of the air storage box 24 is connected with a connecting pipe 221 in contact with the sealing plate 220, and one end of the connecting pipe 221 penetrates into the exhaust box 21 and is connected to the second one-way valve 27, wherein the shape of the sealing plate 220 is half-moon-shaped, the outer surface of the moving rod 219 is connected with a tooth plate 222, and the outer surface of the short rod 217 is connected with a gear 223 meshing with the tooth plate 222;

[0044] like Figure 2-Figure 11 As shown, the bottom of the air storage box 24 is rotatably connected to a long rod 224, wherein a short plate rotatably connected to the long rod 224 is installed at the bottom of the air storage box 24, one end of the long rod 224 and the bottom end of the short rod 217 are respectively connected to two meshing second bevel gears 225, one end of the rotating rod 29 passes through the outside of the air storage box 24, and the outer surfaces of the rotating rod 29 and the long rod 224 are respectively connected to two pulleys 226, and the two pulleys 226 are connected through a belt drive, and one side of the toothed plate 222 is rotatably connected to a sliding rod 227, wherein one side of the toothed plate 222 is installed with a second bevel gear 225 meshing with each other. 27 is a welding plate rotatably connected, the outer surface of the slide bar 227 is sleeved with two symmetrically arranged sliders 228, and the outer surface of the slider 228 is slidably connected to one side of the tooth plate 222, and the opposite side of the two sliders 228 is connected to a return spring 229, the outer surface of the slider 228 is connected to a mounting plate 230, and the outer surface of the mounting plate 230 is rotatably connected to a positioning plate 231, and the side of the positioning plate 231 away from the mounting plate 230 is rotatably connected to a tooth plate 232 meshing with the gear 223, wherein the tooth plate 232 is installed with a rotating shaft seat rotatably connected to the positioning plate 231;

[0045] Specifically, when nitrogen is flushed into the dry quenching coke oven body 1, the first one-way valve 26 is started to connect to the input external nitrogen, and the motor 28 is started. The motor 28 drives the rotating rod 29, the first bevel gear 211, the round rod 210 and the pulley 226 to rotate, and the round rod 210 drives the running plate 212 and the push rod 213 to rotate, so that the push rod 213 is used to push the guide plate 214 to move back and forth, and the guide plate 214 drives the U-shaped rod 215 to move synchronously, and the U-shaped rod 215 pushes the pressing plate 216 to move synchronously, and the pressing plate 216 accelerates the nitrogen in the reciprocating direction, so that the nitrogen is discharged into the exhaust box 21 through the connecting pipe 221, and then discharged into the dry quenching coke oven body 1 through the exhaust box 21. It should be noted that nitrogen can be stored in the gas storage box 24 under normal circumstances. At this time, the pulley 226 drives the long rod 224, the second bevel gear 225, the short rod 217 and the gear 223 to rotate. While the gear 223 rotates, it engages and pushes with the two tooth plates 222, so that the two tooth plates 222 move in opposite directions. The two tooth plates 222 drive the moving rod 219 to move synchronously, so that the two moving rods 219 drive the two sealing plates 220 away from the connecting pipe 221. At this time, the nitrogen is discharged into the exhaust box 21 through the connecting pipe 221. Conversely, the sealing plate 220 is used to seal the connecting pipe 221 to prevent the nitrogen stored in the gas storage box 24 from leaking, which is convenient for use.

[0046] Finally, the working principle of the system for reducing the coke burning rate in the dry quenching coke oven is as follows: when the dry quenching coke oven body 1 is in operation, nitrogen needs to be flushed in to neutralize the air discharged into the dry quenching coke oven body 1, and the exhaust component 2 is started. The exhaust component 2 first discharges the pre-stored nitrogen into the dry quenching coke oven body 1. After being discharged, the exhaust component 2 can be replenished through an external nitrogen storage device, and in the process of discharging nitrogen, the exhaust component 2 can accelerate the discharge of nitrogen, and when storing nitrogen, the exhaust component 2 is used to seal it to prevent nitrogen leakage during the storage stage, which is convenient for use.

[0047] The electronic components and models used in the present invention can be determined according to actual needs.

[0048] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A system for reducing the coke burning rate in a dry quenching coke oven, characterized in that: The invention comprises a dry quenching coke oven body (1), wherein an exhaust assembly (2) is arranged on the outer surface of the dry quenching coke oven body (1), wherein the exhaust assembly (2) comprises an exhaust box (21), wherein the outer surface of the exhaust box (21) is connected to an air storage box (24), wherein the inner cavity of the air storage box (24) is rotatably connected to a rotating rod (29), and wherein the inner cavity of the air storage box (24) is rotatably connected to a round rod (210).

2. A system for reducing the coke burning rate in a dry quenching coke oven according to claim 1, characterized in that: A circulation fan (22) is installed on the outer surface of the exhaust box (21), and the air outlet of the circulation fan (22) is connected to the inner cavity of the exhaust box (21) through an air duct.

3. A system for reducing the coke burning rate in a dry quenching coke oven according to claim 2, characterized in that: The outer surface of the exhaust box (21) is connected to an exhaust pipe (23), and one end of the exhaust pipe (23) is connected to the inner cavity of the dry quenching coke oven body (1). The outer surface of the gas storage box (24) is connected to a connection box (25), and the outer surface of the gas storage box (24) is installed with a first one-way valve (26).

4. A system for reducing the coke burning rate in a dry quenching coke oven according to claim 3, characterized in that: The air inlet of the first one-way valve (26) is connected to the inner cavity of the air storage box (24); the inner cavity of the exhaust box (21) is provided with a second one-way valve (27); the inner cavity of the connection box (25) is bolted with a motor (28); the output shaft of the motor (28) passes through the inner cavity of the air storage box (24) and is connected to one end of a rotating rod (29).

5. A system for reducing the coke burning rate in a dry quenching coke oven according to claim 4, characterized in that: One end of the round rod (210) and the outer surface of the rotating rod (29) are respectively connected to two meshing first bevel gears (211); the top end of the round rod (210) is connected to a running plate (212); the top of the running plate (212) is rotatably connected to a push rod (213) via a bearing; and the inner cavity at the top of the air storage box (24) is slidably connected to a guide plate (214).

6. A system for reducing the coke burning rate in a dry quenching coke oven according to claim 5, characterized in that: The top end of the push rod (213) is slidably connected to the inner side of the guide plate (214); the outer surface of the guide plate (214) is connected to two symmetrically arranged U-shaped rods (215); one end of the U-shaped rod (215) away from the guide plate (214) penetrates into the inner cavity at the bottom of the air storage box (24) and is connected to a pressure plate (216).

7. A system for reducing the coke burning rate in a dry quenching coke oven according to claim 6, characterized in that: The bottom of the air storage box (24) is rotatably connected to a short rod (217), both sides of the bottom of the air storage box (24) are connected to limit plates (218), and opposite sides of the two limit plates (218) are slidably connected to moving rods (219), and one end of the moving rod (219) away from the limit plate (218) penetrates into the inner cavity of the air storage box (24) and is connected to a sealing plate (220).

8. A system for reducing the coke burning rate in a dry quenching coke oven according to claim 7, characterized in that: The inner cavity of the air storage box (24) is connected to a connecting pipe (221) in contact with the sealing plate (220), and one end of the connecting pipe (221) passes through the exhaust box (21) and is connected to the second one-way valve (27). The outer surface of the movable rod (219) is connected to a toothed plate (222), and the outer surface of the short rod (217) is connected to a gear (223) meshing with the toothed plate (222). The bottom of the air storage box (24) is rotatably connected to a long rod (224).

9. A system for reducing the coke burning rate in a dry quenching coke oven according to claim 8, characterized in that: One end of the long rod (224) and the bottom end of the short rod (217) are respectively connected to two meshing second bevel gears (225); one end of the rotating rod (29) penetrates the outside of the air storage box (24); the outer surfaces of the rotating rod (29) and the long rod (224) are respectively connected to two pulleys (226), and the two pulleys (226) are connected by belt transmission; one side of the toothed plate (222) is rotatably connected to a sliding rod (227), and the outer surface of the sliding rod (227) is sleeved with two The invention discloses a symmetrically arranged slider (228), wherein the outer surface of the slider (228) is slidably connected to one side of the tooth plate (222), and the opposite side of the two sliders (228) is connected to a return spring (229), and the outer surface of the slider (228) is connected to a mounting plate (230), and the outer surface of the mounting plate (230) is rotatably connected to a positioning plate (231), and the side of the positioning plate (231) away from the mounting plate (230) is rotatably connected to a tooth plate (232) meshing with the gear (223).

10. A method for reducing the coke burning rate in a dry quenching coke oven, comprising the system for reducing the coke burning rate in a dry quenching coke oven according to any one of claims 1 to 9, characterized in that: The following steps are also included: 1) Preparation for nitrogen filling: first, the nitrogen in the gas storage box (24) is calibrated through a gas online detection instrument and a nitrogen flow meter to ensure normal operation. Before nitrogen filling, the air tightness of the dry quenching furnace and the boiler is checked, and a systematic inspection of key equipment is carried out to ensure that the entire system operates stably, and the content of each component of the circulating gas is H2 <3%, CO <8%, O2 <1%, CO2 <18%, T6 temperature <980°C, coke discharge temperature <180°C and other key process parameters are controlled within the index range. Before nitrogen filling, a pressure gauge is installed at the nitrogen filling position; 2) Implementation stage: During the normal production of the dry quenching coke oven body (1), nitrogen is gradually charged without exiting the air guide. Nitrogen is charged into the dry quenching coke oven body (1). The operation is carried out step by step by opening the nitrogen valves one by one every day. When opening and closing the nitrogen valves, it is necessary to do it slowly. According to the content of combustible gas, the air introduction amount is gradually reduced until the air introduction system is completely exited. When the pressure fluctuation of the pre-storage chamber is large, the nitrogen charging point can be adjusted and the nitrogen is pushed into the dry quenching coke oven body (1) through the air flow of the circulating fan (22). When the air introduction system is completely exited, the nitrogen valve at the air guide is opened. According to the content of each component of the circulating gas and the pressure fluctuation of the pre-storage chamber, the nitrogen charging amount of the air guide and the dry quenching coke oven body (1) is adjusted. When the coke discharge temperature is greater than 180°C, the circulating air volume is appropriately adjusted to reduce the temperature according to the actual production. The specific start time of this nitrogen charging is subject to the instructions of the dispatching room, and the nitrogen charging cycle is to be determined according to the operation effect; 3) Data statistics, record the data of each temperature measuring point before and after nitrogen filling, compare and analyze the temperature changes of each measuring point before and after nitrogen filling, pay special attention to the coke discharge temperature and the internal temperature of the dry coke quenching oven body (1), record the data of each pressure measuring point before and after nitrogen filling, compare and analyze the pressure changes of each measuring point before and after nitrogen filling, pay special attention to the pressure changes of the pre-storage chamber and the suction of the dry coke quenching oven body (1), record the data of the composition of the dry coke quenching circulating gas, compare and analyze the changes of the composition of the circulating gas before and after nitrogen filling, record the data of the steam volume before and after nitrogen filling, compare and analyze the changes of the steam volume before and after nitrogen filling, contact the inspection center to test the carbon content of the coke powder before and after nitrogen filling, compare and analyze the changes of the carbon content of the coke powder before and after nitrogen filling, record the data of the output and coke powder before and after nitrogen filling, calculate the coke burnout rate of the dry coke quenching, and compare the changes of the burnout data before and after nitrogen filling.

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