CN211035810U - Coupling system for coal-charging smoke treatment and coke oven flue gas purification of top-loading coke oven - Google Patents

Abstract

The utility model relates to a top-loading coke oven coal-charging smoke dust treatment and coke oven flue gas purification coupling system, which comprises a smoke guide tee joint A, a smoke guide tee joint B, a flue gas combustion device, a fan, a coke oven flue gas desulfurization and denitrification device and a coke oven flue gas waste heat recovery device; a gas cut-off valve is arranged on the bridge pipe; a smoke stop valve is arranged on a connecting pipe of the smoke guide tee joint B and the smoke guide tee joint A; the corresponding interfaces of the smoke guide tee joints B of all the carbonization chambers are connected in series to form a furnace top coal charging smoke dust pipeline; the furnace top coal charging smoke pipeline is sequentially connected with a smoke combustion device, a fan, a coke oven smoke desulfurization and denitrification device, a coke oven smoke waste heat recovery device and a chimney through a smoke conveying pipeline. The utility model discloses can effectively avoid the leading-in gas system of smoke and dust that top loading coke oven coal charging in-process produced and the gas clean system and the equipment that appear are unfavorable in the same direction as a moving, tar product quality reduces the scheduling problem, promotes the application of coal humidifying technology, reduces the operation energy consumption when improving coke oven flue gas denitration efficiency.

Description

Coupling system for coal-charging smoke treatment and coke oven flue gas purification of top-loading coke oven

Technical Field

The utility model relates to a coal coking technical field especially relates to a top-loading coke oven coal-charging smoke dust handles and coke oven gas cleaning coupled system.

Background

In the coking production, the heat accumulating type coke oven is most widely applied, and the coal charging mode can be generally divided into a top charging coke oven and a tamping coke oven. In either top-loading or stamp-charging coke ovens, the charging of the coal for coking is basically carried out in a hot charging mode, i.e., the coal for coking is charged into the coking chamber under a high-temperature state of the coking chamber. In the coal charging process, the coal material charged into the carbonization chamber is contacted with the hot inner wall of the carbonization chamber or can instantly generate a large amount of smoke under the high-temperature environment in the carbonization chamber, and the generated smoke can carry a certain amount of coal material particles. In order to prevent or reduce the pollution to the surrounding environment caused by the escape of a large amount of smoke dust from the carbonization chamber in the process of charging coal into the carbonization chamber, smoke-free coal charging processes such as Proven and OPR are generally adopted for the coal charging process, or the smoke dust escaping from the top of the furnace and the smoke dust escaping from the furnace door of the machine side are collected by high-pressure ammonia water injection and then purified by a coal charging dust removal system.

For the smokeless coal charging process such as Proven, OPR and the like, a coal charging hole at the top of a carbonization chamber is effectively sealed by a coal charging machine, meanwhile, micro negative pressure is formed in the carbonization chamber by improving the suction force of a coke oven gas collecting pipe, and a large amount of smoke generated during coal charging is led into the gas collecting pipe through an ascending pipe and a bridge pipe communicated with the coke oven gas collecting pipe, thereby realizing smokeless coal charging operation. In the process, although the flue gas generated during coal charging is introduced into the gas system, the carried coal dust is also brought into the gas system, when the flue gas passes through the bridge pipe, most of the coal dust is washed by ammonia water used for gas cooling and enters tar along with tar ammonia water, tar slag is formed in the subsequent tar ammonia water separation process, and a part of the coal dust enters a subsequent primary cooler and an electric tar precipitator, so that the running resistance of the primary cooler can be increased, the cooling efficiency of the primary cooler is reduced, meanwhile, the quality of the tar can be reduced due to the fact that the coal dust enters the tar, and a certain amount of tar slag needing special treatment is generated.

For the process of utilizing high-pressure ammonia water injection to combine and catch the smoke dust escaping from the top of the furnace and the smoke dust escaping from the furnace door at the machine side and then purifying the smoke dust by a coal charging dust removing system, on one hand, the coal charging hole at the top of the carbonization chamber needs to be effectively sealed by a coal charging machine during coal charging, the coal charging smoke dust escaping from the outside is caught by a coal charging smoke dust catching facility arranged on a coal charging car or arranged above the furnace door at the machine side, and then the caught smoke dust is sent into the coal charging dust removing system through a dust removing pipeline to be purified, so that a corresponding coal charging dust removing ground station system or a vehicle-mounted coal charging dust removing system needs to be built, and a certain amount of power media such as water, compressed air, steam, electric energy. On the other hand, a high-pressure ammonia water injection facility needs to be arranged at the bridge pipe corresponding to the coal charging carbonization chamber or the bridge pipe corresponding to the adjacent carbonization chamber, most of smoke dust generated in the coal charging process is guided into the gas collecting pipe through the ascending pipe and the bridge pipe by utilizing the suction force formed by high-pressure ammonia water injection, so that a high-pressure ammonia water system needs to be arranged, and when the high-pressure ammonia water system consumes a certain amount of electric energy during operation, the coal dust brought into the gas system still brings the above-mentioned adverse effects to a subsequent gas purification system and reduces the quality of tar and other related problems.

With the development of the coking industry and the increasing importance on energy conservation and consumption reduction, a coal moisture control technology for reducing moisture of coal as fired by means of drying, preheating and the like before the coal as fired is loaded into a carbonization chamber receives attention in the industry, people try to reduce coking energy consumption by the coal moisture control technology, but in the practice of implementing the technology, the problem that coal dust led into a coal gas system in the coal loading process is greatly increased due to the fact that the moisture of the coal material is reduced is inevitably solved, the serious influence is brought to the smooth operation and the tar quality of a subsequent coal gas purification system by the large increase of the coal dust, so that the use of the coal moisture control technology by a plurality of enterprises is forbidden, and the popularization of the coal moisture control technology is subject to larger resistance.

From the whole coking process, if the flue gas generated during coal charging is completely recycled, about 2-4% of coal gas can be recycled. The existing coal-charging smoke dust treatment process has the problems that the effective recovery of coal gas resources is realized although part or all of flue gas generated during coal charging is guided into a coal gas system, the temperature of the flue gas is low, the moisture content in the flue gas is high, the effective coal gas components are not high, and meanwhile, the content of oxygen in the flue gas can be increased due to the suction force generated by the flue gas guide-in system, so that certain threat is brought to the safe operation of a subsequent coal gas purification system.

For the purification of the coke oven flue gas, generally, because the temperature of the coke oven flue gas is low, a catalyst with high price and low denitration efficiency is often needed to be adopted when the denitration of the coke oven flue gas is carried out, and when the ultra-low emission index is needed to be reached, the high-temperature waste gas generated by burning fuel gas by a heating furnace is often needed to be mixed into the coke oven flue gas so as to improve the temperature of the coke oven flue gas, so that the requirements of using the catalyst with high denitration efficiency and low price are met, and the construction investment and the long-term operation energy consumption are obviously increased.

In summary, in order to effectively avoid the above problems caused by coal-charging smoke dust treatment in the coal charging process, and simultaneously solve the problem of low temperature of the coke oven smoke, improve the smoothness and tar quality of the gas purification system, promote the popularization and implementation of energy-saving technologies such as coal moisture control and the like, and improve the coke oven smoke purification efficiency, a new coal-charging smoke dust treatment process needs to be developed by adopting a new technical route and a new technical means for the smoke dust generated in the coal charging process.

Disclosure of Invention

The utility model provides a top-mounted coke oven coal-charging smoke dust treatment and coke oven flue gas purification coupled system can effectively avoid the leading-in gas system of smoke and dust that top-mounted coke oven coal-charging in-process produced and the gas clean system and the equipment that appear unfavorable, tar product quality reduces the scheduling problem in the same direction as going, promotes the application of coal humidifying technology, reduces the operation energy consumption when improving coke oven flue gas denitration efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the coupling system for coal-charging smoke dust treatment and coke oven flue gas purification of the top-loading coke oven comprises a smoke guide tee joint A, a smoke guide tee joint B, a flue gas combustion device, a fan, a coke oven flue gas desulfurization and denitrification device and a coke oven flue gas waste heat recovery device; the top of a carbonization chamber of the top-mounted coke oven is provided with an ascending pipe, the middle part of the ascending pipe is connected with a gas collecting pipe through a bridge pipe, and the bridge pipe is provided with a gas cut-off valve; the top of the ascending pipe is provided with a smoke guide tee joint A, a first connector and a second connector of the smoke guide tee joint A are oppositely arranged, the central connecting line of the smoke guide tee joint A and the first connector is coaxial with the axis of the ascending pipe, the first connector is connected with the top opening of the ascending pipe, and the second connector is provided with a water seal valve; the first connector of the smoke guide tee joint B is connected with the third connector of the smoke guide tee joint A through a first connecting pipeline, and a smoke stop valve is arranged on the first connecting pipeline; the second and third interfaces of the smoke guide tee joint B are respectively connected with the corresponding interfaces of the smoke guide tee joint B of the adjacent carbonization chambers on the corresponding side through the second connecting pipeline, and the corresponding interfaces of the smoke guide tee joints B of the carbonization chambers are connected in series to form a coal charging smoke dust pipeline on the top of the furnace; the furnace top coal charging smoke pipeline is sequentially connected with a smoke combustion device, a fan, a coke oven smoke desulfurization and denitrification device, a coke oven smoke waste heat recovery device and a chimney through a smoke conveying pipeline.

The flue gas combustion device has a volume not less than 3m³The side wall of the flue gas combustion chamber is provided with an ignition device and a combustion-supporting gas inlet.

The flue gas inlet of the coke oven flue gas desulfurization and denitrification device is connected with the main flue of the top-mounted coke oven through a coke oven flue gas pipeline, a combustion flue gas inlet is arranged on the coke oven flue gas pipeline close to the coke oven flue gas desulfurization and denitrification device, the inlet of the fan is connected with the high-temperature flue gas outlet of the flue gas combustion device, and the outlet of the fan is connected with the combustion flue gas inlet.

Along the flowing direction of the flue gas, the starting end of the furnace top coal-charging smoke dust pipeline is connected with a gas collecting pipe through a communicating pipe, and a balance valve is arranged on the communicating pipe.

The coal charging sealing device is a sleeve type coal charging sealing device which consists of an inner sleeve, a sliding sleeve, a sealing connecting sleeve and an outer sleeve which are sequentially arranged from inside to outside, wherein the inner sleeve is a coal discharging channel, and the top of the inner sleeve is connected with a coal hopper discharge port of the coal charging car; the sliding sleeve can vertically slide along the inner sleeve; the bottom end of the sealing connecting sleeve is provided with a spherical structure which is matched with the coal charging hole seat to realize the sealing of the coal charging hole; the outer sleeve is provided with a telescopic flexible connecting structure.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the smooth capability of the gas purification system is improved, and the quality of the gas and the tar is improved;

the flue gas with a large amount of coal dust generated in the coal charging process of the coke oven is separately collected and treated, so that the flue gas with a large amount of coal dust is prevented from entering a gas purification system, factors of resistance increase and cooling capacity reduction of a gas primary cooling device caused by the coal dust carried in the flue gas are eliminated, the smooth capacity of the gas purification system is improved, the quality of the gas and the quality of the collected tar are improved, and the generation of tar residues is reduced.

2) The coal charging smoke dust treatment investment and the operation cost are reduced;

the smoke with a large amount of coal dust generated during the coal charging of the coke oven is separately collected and treated, so that smokeless coal charging systems such as high-pressure ammonia water, Proven and OPR are omitted, a coal charging and dedusting system in the prior art is not required to be built, and the investment of project construction and the energy consumption of the system in long-term operation can be obviously reduced.

3) The gas resources are fully utilized, the coke oven flue gas purification efficiency is improved, and the coke oven flue gas purification operation cost is reduced;

the flue gas with a large amount of coal dust generated during the coal charging of the coke oven is independently collected and combusted and then is doped into the flue gas of the coke oven, so that on one hand, the temperature of the flue gas of the coke oven is improved, the purification efficiency of the flue gas of the coke oven can be improved, the purification operation cost of the flue gas of the coke oven is reduced, on the other hand, the waste heat of the purified flue gas of the coke oven is recovered by using the flue gas waste heat recovery device of the coke oven, the effective utilization of low-quality coal gas resources is realized, the consumption of high-quality coke oven gas is reduced.

4) The running safety of the gas purification system is improved;

utilize the suction that high-pressure ammonia water injection produced or improve among the prior art the leading-in gas purification system's of flue gas that produces when the suction in the coal gas collecting main will coal charge technology, the utility model discloses the flue gas that has a large amount of coal dusts that produces when utilizing the fan to load the coal with the coke oven collects the processing alone, needn't consider because of flue gas collecting system suction too big arouse that the oxygen content that gets into among the gas purification system exceeds standard brings the problem of serious threat for gas purification system's safety, when guaranteeing that the coal charge process carries out effective entrapment to the smoke and dust that produces, improved the security of gas purification system operation.

5) The application and popularization of the coal moisture control process are facilitated;

the flue gas with a large amount of coal dust generated in the coal charging process of the coke oven is independently collected, so that the influence of a large amount of coal dust in the flue gas generated in the coal charging process on a coal gas purification system due to the implementation of a coal moisture control technology is eliminated, the restriction of side effects generated in the implementation of the coal moisture control technology on the application of the coal moisture control technology is relieved, and the application and the popularization of the coal moisture control technology are facilitated.

Drawings

FIG. 1 is a schematic structural diagram of a coupling system for coal-charging smoke treatment and coke oven smoke purification of a top-loading coke oven of the present invention.

FIG. 2 is a schematic view showing the connection relationship between the ascending tube, the gas collecting tube and the coal-charging smoke-guiding pipe on the top of the furnace.

Fig. 3 is a schematic view (before coal charging) of the working state of the furnace top coal charging sealing device of the utility model.

Fig. 4 is a schematic view of the working state of the furnace top coal charging sealing device (in coal charging).

In the figure: 1. top-mounted coke oven 2, top-mounted coal charging sealing device 21, coal hopper 22, inner sleeve 23, sliding sleeve 24, sealing connecting sleeve 25, outer sleeve 26, telescopic flexible connecting structure 27, spherical structure 3, ascending pipe 4, coal gas stop valve 5, smoke guide tee joint A6, smoke stop valve 7, smoke guide tee joint B8, smoke combustion device 9, fan 10, coke oven smoke desulfurization and denitration device 11, coke oven smoke waste heat recovery device 12, balance valve 13, smoke conveying pipeline 14, chimney 15, gas collecting pipe 16, water sealing valve 17, coal as fired 18 and coal charging hole 18

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in fig. 1 and 2, the coupling system for coal-charging smoke dust treatment and coke oven flue gas purification of the top-loading coke oven of the present invention comprises a smoke guide tee joint A5, a smoke guide tee joint B7, a flue gas combustion device 8, a fan 9, a coke oven flue gas desulfurization and denitrification device 10, and a coke oven flue gas waste heat recovery device 11; the top of a carbonization chamber of the top-mounted coke oven 1 is provided with a rising pipe 3, the middle part of the rising pipe 3 is connected with a gas collecting pipe 15 through a bridge pipe, and the bridge pipe is provided with a gas cut-off valve 4; the top of the ascending pipe 3 is provided with a smoke guide tee A5, a first connector and a second connector of the smoke guide tee A5 are oppositely arranged, the central connecting line of the first connector and the second connector is coaxial with the axis of the ascending pipe 3, the first connector is connected with the top opening of the ascending pipe 3, and the second connector is provided with a water seal valve 16; the first connector of the smoke guide tee joint B7 is connected with the third connector of the smoke guide tee joint A5 through a first connecting pipeline, and a smoke stop valve 6 is arranged on the first connecting pipeline; the second and third interfaces of the smoke guide tee joint B7 are respectively connected with the corresponding interfaces of the smoke guide tee joint B7 of the adjacent carbonization chambers on the corresponding side through the second connecting pipeline, and the corresponding interfaces of the smoke guide tee joints B7 of each carbonization chamber are connected in series to form a coal charging smoke dust pipeline on the top of the furnace; the furnace top coal charging smoke pipeline is sequentially connected with a smoke combustion device 8, a fan 9, a coke oven smoke desulfurization and denitration device 10, a coke oven smoke waste heat recovery device 11 and a chimney 14 through a smoke conveying pipeline 13.

The gas shut-off valve 4 can be a water-sealed valve in the prior art, or can be any device capable of realizing the functions of conducting and shutting off the gas channel between the ascending pipe 3 and the gas collecting pipe 15 by opening and closing. The water seal valve 16 is a riser water seal valve conventionally used in the prior art.

The first connecting pipeline and the smoke conveying pipeline 13 are obliquely arranged, so that the situation that the smoke channel is blocked due to deposition of coal dust in the coal-charging smoke in the smoke channel can be avoided.

The volume of the flue gas combustion device 8 is not less than 3m³The side wall of the flue gas combustion chamber is provided with an ignition device and a combustion-supporting gas inlet. The coal-charging smoke dust enters a smoke combustion chamber of a smoke combustion device 8 under the action of a fan 9, a mixture of the coal-charging smoke dust and introduced combustion-supporting gas is ignited through an ignition device, a large amount of high-temperature waste gas is generated when coal gas components and coal dust in the coal-charging smoke dust are combusted, residual dust generated by combustion of the coal dust is settled to the bottom in the smoke combustion chamber, and the high-temperature waste gas is converged with coke oven smoke generated by combustion of a coke oven heating system through a smoke conveying pipeline 13.

The flue gas inlet of the coke oven flue gas desulfurization and denitrification device 10 is connected with the main flue of the top-mounted coke oven 1 through a coke oven flue gas pipeline, a combustion flue gas inlet is arranged on the coke oven flue gas pipeline close to the coke oven flue gas desulfurization and denitrification device 10, the inlet of the fan 9 is connected with the high-temperature flue gas outlet of the flue gas combustion device 8, and the outlet of the fan 9 is connected with the combustion flue gas inlet.

Along the flowing direction of the flue gas, the starting end of the furnace top coal charging smoke dust pipeline is connected with a gas collecting pipe 15 through a communicating pipe, and a balance valve 12 is arranged on the communicating pipe. By arranging the balance valve 12, the surge problem which may occur to the fan 9 during operation is eliminated, and the safe and stable operation of the fan 9 is ensured.

The coupling system for coal charging smoke dust treatment and coke oven smoke purification of the top charging coke oven of the utility model also comprises a furnace top coal charging sealing device 2 arranged on the furnace top coal charging car, wherein the furnace top coal charging sealing device 2 is a sleeve type furnace top coal charging sealing device and consists of an inner sleeve 22, a sliding sleeve 23, a sealing connecting sleeve 24 and an outer sleeve 25 which are sequentially arranged from inside to outside, the inner sleeve 22 is a coal discharging channel, and the top of the inner sleeve is connected with a coal hopper 21 discharge port of the coal charging car; the sliding sleeve 23 is able to slide vertically along the inner sleeve 22; the sealing connecting sleeve 24 is connected with the coal hopper 21 through an outer sleeve 25, and a spherical structure 27 is arranged at the bottom end of the sealing connecting sleeve 24 and matched with the coal charging hole seat to realize sealing of the coal charging hole 18; the outer sleeve 25 is provided with a flexible telescopic connection 26.

During coal charging, smoke generated in the carbonization chamber cannot escape from the coal charging hole 18 under the action of spherical seal between the bottom end of the sealing connecting sleeve 24 and the coal charging hole seat and negative pressure caused by the fan 9, so that smokeless coal charging in the coal charging process is realized. Different with current furnace roof coal charging sealing device, the utility model discloses a sealed connection sleeve 24 and the sealed form of coal charging hole seat sphere cooperation can effectively avoid the suction to coal charging smoke and dust entrapment in-process ambient air when preventing that the coal charging smoke and dust from escaping outward, improve coal charging smoke and dust entrapment and processing system's security.

The outer sleeve 25 can also be provided with a smoke guide outlet, an annular channel between the sliding sleeve 23 and the sealing connecting sleeve 24 is used as a smoke guide channel and is connected with a smoke collecting pipeline on the coal charging car through the smoke guide outlet, and the smoke collecting pipeline is additionally connected with the smoke combustion device 8.

The technical process of the coupling system for coal-charging smoke treatment and coke oven flue gas purification of the top-loading coke oven is as follows:

1) before the coal charging operation in the carbonization chamber is started, the ascending pipe 3 corresponding to the carbonization chamber is separated from the gas collecting pipe 15 by closing the gas stop valve 4 on the bridge pipe, and the water seal valve 16 is closed at the same time, so that the ascending pipe 3 is isolated from the atmosphere, and the coal charging smoke dust generated during the coal charging is prevented from entering a gas purification system by mistake;

2) the coal charging car on the top of the furnace moves to the upper part of the coking chamber to be charged with coal, after the coal charging hole cover corresponding to the coking chamber is opened, the sliding sleeve 23 and the sealing connecting sleeve 24 are lowered, and the coal charging hole 18 is sealed through a spherical sealing structure formed by a spherical structure 27 at the bottom end of the sealing connecting sleeve 24 and a coal charging hole seat; coal-charging smoke dust generated in the coking chamber during coal charging is guaranteed to be dissipated to the periphery of the top-charging coke oven 1 through the coal-charging hole 18 to cause environmental pollution;

3) opening a smoke stop valve 6 corresponding to the coking chamber to be charged with coal, and communicating an ascending pipe 3 thereof with a coal charging smoke dust pipeline at the top of the furnace; at the moment, under the action of the fan 9, a certain negative pressure is formed in the carbonization chamber, which is beneficial to effectively catching coal-charging smoke dust generated during coal charging;

4) a large amount of smoke generated during coal charging enters a smoke combustion device 8 through an ascending pipe 3, a smoke guide tee joint A5, a smoke stop valve 6, a smoke guide tee joint B7 and a smoke dust pipeline for coal charging at the top of the furnace under the action of a fan 9, the smoke dust and combustible components in the smoke generate combustion reaction with introduced combustion-supporting gas in the smoke combustion device 8, the generated high-temperature smoke enters a coke oven smoke pipeline upstream of a coke oven smoke desulfurization and denitration device 10 under the action of the fan 9 and is mixed with coke oven smoke, the temperature of the coke oven smoke is raised and then enters the coke oven smoke desulfurization and denitration device 10 for desulfurization and denitration treatment, the purified smoke enters a coke oven smoke waste heat recovery device 11 for recovering waste heat, and then is discharged through a chimney 14;

because the temperature of the mixed coke oven flue gas is improved to a certain extent, the method is beneficial to adopting a denitration catalyst with higher catalytic efficiency and more stable and reliable operation, and reduces the operation cost of a denitration system while improving the denitration effect. The purified coke oven flue gas enters a coke oven flue gas waste heat recovery device 11 to recover waste heat;

5) after the coal charging is finished, the sliding sleeve 23 and the sealing connecting sleeve 24 are lifted, the coal charging car at the top of the furnace is driven away, and the corresponding coal charging hole 18 is sealed through a coal charging hole cover; at the moment, opening the corresponding gas cut-off valve 4, and communicating the ascending pipe 3 with the gas collecting pipe 15 again; and closing the previously opened flue gas stop valve 6 to cut off a passage between the ascending pipe 3 and the coal charging flue dust pipeline on the top of the furnace. At the moment, the coal material in the carbonization chamber enters a carbonization process in an oxygen-free environment, and the coal gas generated by carbonization only carries little dust in a stable state of the coal material, so that the adverse effect of the coal gas introduced into the coal gas purification system on subsequent purification treatment facilities caused by the dust is basically eliminated during non-coal charging, and the quality of tar is also certainly and greatly improved.

When the furnace top coal charging sealing device 2 with the smoke dust collecting pipeline is adopted, in the coal charging process, part of smoke dust at the coal charging hole 18 is guided out by the smoke guide channel between the sliding sleeve 23 and the sealing connecting sleeve 24 and is sent into the smoke gas combustion device 8 through the smoke dust collecting pipeline for purification treatment.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (5)

1. The coupling system for coal-charging smoke dust treatment and coke oven flue gas purification of the top-loading coke oven is characterized by comprising a smoke guide tee joint A, a smoke guide tee joint B, a flue gas combustion device, a fan, a coke oven flue gas desulfurization and denitrification device and a coke oven flue gas waste heat recovery device; the top of a carbonization chamber of the top-mounted coke oven is provided with an ascending pipe, the middle part of the ascending pipe is connected with a gas collecting pipe through a bridge pipe, and the bridge pipe is provided with a gas cut-off valve; the top of the ascending pipe is provided with a smoke guide tee joint A, a first connector and a second connector of the smoke guide tee joint A are oppositely arranged, the central connecting line of the smoke guide tee joint A and the first connector is coaxial with the axis of the ascending pipe, the first connector is connected with the top opening of the ascending pipe, and the second connector is provided with a water seal valve; the first connector of the smoke guide tee joint B is connected with the third connector of the smoke guide tee joint A through a first connecting pipeline, and a smoke stop valve is arranged on the first connecting pipeline; the second and third interfaces of the smoke guide tee joint B are respectively connected with the corresponding interfaces of the smoke guide tee joint B of the adjacent carbonization chambers on the corresponding side through the second connecting pipeline, and the corresponding interfaces of the smoke guide tee joints B of the carbonization chambers are connected in series to form a coal charging smoke dust pipeline on the top of the furnace; the furnace top coal charging smoke pipeline is sequentially connected with a smoke combustion device, a fan, a coke oven smoke desulfurization and denitrification device, a coke oven smoke waste heat recovery device and a chimney through a smoke conveying pipeline.

2. The top loaded coke oven coaling smoke treatment and coke oven flue gas purification coupled system of claim 1, wherein the flue gas combustion device is not less than 3m in volume³The side wall of the flue gas combustion chamber is provided with an ignition device and a combustion-supporting gas inlet.

3. The top-loading coke oven coaling smoke dust treatment and coke oven smoke purification coupling system of claim 1, wherein the smoke inlet of the coke oven smoke desulfurization and denitrification device is connected with the main flue of the top-loading coke oven through a coke oven smoke pipeline, the coke oven smoke pipeline close to the coke oven smoke desulfurization and denitrification device is provided with a combustion smoke inlet, the inlet of the fan is connected with the high-temperature smoke outlet of the smoke combustion device, and the outlet of the fan is connected with the combustion smoke inlet.

4. The coupling system for treating coal-charging flue dust and purifying coke oven flue gas of a top-charging coke oven according to claim 1, wherein along the flow direction of the flue gas, the starting end of the coal-charging flue dust pipeline on the top of the top is connected with a gas collecting pipe through a communicating pipe, and the communicating pipe is provided with a balance valve.

5. The coupling system for coal-charging smoke dust treatment and coke oven smoke purification of the top-charging coke oven as claimed in claim 1, further comprising a top coal-charging sealing device arranged on the top coal-charging car, wherein the top coal-charging sealing device is a sleeve type top coal-charging sealing device and consists of an inner sleeve, a sliding sleeve, a sealing connecting sleeve and an outer sleeve which are sequentially arranged from inside to outside, the inner sleeve is a coal feeding channel, and the top of the inner sleeve is connected with a coal hopper discharge port of the coal-charging car; the sliding sleeve can vertically slide along the inner sleeve; the bottom end of the sealing connecting sleeve is provided with a spherical structure which is matched with the coal charging hole seat to realize the sealing of the coal charging hole; the outer sleeve is provided with a telescopic flexible connecting structure.

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