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 coupling system for top-loading coke oven coal-loading smoke dust treatment and coke oven flue gas purification, including a smoke guide tee A, a smoke guide tee B, a smoke 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 shut-off valve is arranged on the bridge pipe; a smoke guide tee B and a smoke guide tee A connecting pipe are provided with a smoke shut-off valve; the corresponding interfaces of the smoke guide tees B of each carbonization chamber are connected in series to form a furnace top coal-loading smoke dust pipeline; the furnace top coal-loading smoke dust pipeline is sequentially connected to the smoke combustion device, the fan, the coke oven flue gas desulfurization and denitrification device, the coke oven flue gas waste heat recovery device and the chimney through a smoke dust conveying pipeline. The utility model can effectively avoid the problems of the gas purification system and equipment being unfavorable in smooth operation and the reduction of tar product quality caused by the smoke generated in the process of top-loading coke oven coal-loading being introduced into the gas system, promote the application of coal humidity adjustment technology, improve the efficiency of coke oven flue gas denitrification and reduce the operating energy consumption.

Description

Coupling system of coal-loading soot treatment and coke oven flue gas purification in top-loading coke ovens

technical field

The utility model relates to the technical field of coal coking, in particular to a coupling system for the treatment of coal-loaded smoke and dust in a top-loading coke oven and the purification of coke oven flue gas.

Background technique

In coking production, the most widely used regenerative coke oven is usually divided into two types: top-loading coke oven and tamping coke oven. Whether it is a top-loading coke oven or a tamping coke oven, the coking coal is basically charged by hot charging, that is, when the coking chamber is at a high temperature, the coking coal is charged into the coking chamber. In the process of coal loading, the coal loaded into the carbonization chamber will contact with the hot inner wall of the carbonization chamber or a large amount of flue gas will be generated instantaneously in the high temperature environment of the carbonization chamber, and a certain amount of coal particles will be carried in the generated large amount of flue gas. In order to prevent or reduce the pollution to the surrounding environment caused by the escape of a large amount of smoke and dust from the carbonization chamber during the coal charging process, for the coal charging process, an anthracite coal charging process such as Proven and OPR is usually used, or high-pressure ammonia injection is used. Combined with the process of collecting the escaping smoke and dust from the top of the furnace and the escaping smoke and dust from the furnace door on the side of the machine, and then purifying it through the coal charging and dust removal system.

For anthracite coal charging processes such as Proven and OPR, the coal charging hole at the top of the carbonization chamber is effectively sealed by a coal charging machine. A large amount of smoke and dust generated during coal is introduced into the gas collecting pipe through the rising pipe and bridge pipe connected with the coke oven gas gas collecting pipe, so as to realize the smokeless coal charging operation. In this process, although the flue gas generated during coal charging is introduced into the gas system, the coal dust carried by it is also brought into the gas system. When passing through the bridge pipe, most of the coal dust is washed down by ammonia water used for gas cooling. As the tar ammonia water enters the tar, tar residue is formed in the subsequent separation process of the tar ammonia water, and a part of the coal dust enters the subsequent primary cooler and electric tar catcher, which will increase the operating resistance of the primary cooler and reduce the The cooling efficiency of the primary cooler, at the same time, because the coal dust enters the tar, the quality of the tar will be reduced, and a certain amount of tar residue that needs special treatment will be generated.

For the process of using high-pressure ammonia injection combined with the collection of smoke and dust from the top of the furnace and the smoke and dust from the furnace door on the side of the machine, and then purifying through the coal charging and dust removal system, on the one hand, it is necessary to use the coal charging hole at the top of the carbonization chamber when coal is charged. The coal-charging machinery is effectively sealed, and the coal-charging smoke and dust collection facilities installed on the coal-charging truck or above the furnace door on the side of the machine are used to capture the escaping coal-loading smoke and dust, and then the captured smoke and dust are sent to the loading unit through the dust removal pipeline. Purification is carried out in the coal dust removal system. For this reason, it is necessary to build a corresponding coal charging dust removal ground station system or a vehicle-mounted coal charging dust removal system. A certain amount of water, compressed air, steam, electricity and other power media are also consumed during operation. On the other hand, at the bridge pipe corresponding to the coal-loading chamber or the bridge pipe adjacent to the carbonization chamber, a high-pressure ammonia water injection facility needs to be set up to use the suction formed by the high-pressure ammonia water injection to pass most of the smoke and dust generated during the coal charging process through the The riser pipe and bridge pipe are introduced into the gas collecting pipe. For this purpose, a high-pressure ammonia water system needs to be set up. While the high-pressure ammonia water system consumes a certain amount of electric energy during operation, the coal dust brought into the gas system will still bring the aforementioned effects to the subsequent gas purification system. adverse effects and related problems such as reducing the quality of tar.

With the development of the coking industry and the increasing emphasis on energy saving and consumption reduction, the coal humidity control technology that reduces the moisture content of the coal entering the furnace by drying and preheating before being loaded into the coking chamber has attracted the attention of the industry. The coal humidity control technology reduces the energy consumption of coking, but in the practice of implementing this technology, it is inevitable to encounter the problem of a large increase in the coal dust introduced into the gas system during the coal charging process due to the reduction of coal moisture. The large increase of coal has a serious impact on the follow-up gas purification system and the quality of tar. Therefore, many enterprises are often discouraged from using coal humidity control technology, and the promotion of coal humidity control technology encounters great resistance.

From the perspective of the entire coking process, if all the flue gas generated during coal charging is recovered, about 2 to 4% of the gas can be recovered. The existing coal charging smoke and dust treatment process, although part or all of the flue gas generated during coal charging is introduced into the gas system to achieve effective recovery of gas resources, but it also brings the above problems, and the temperature of the flue gas is relatively low at this time. , the moisture content in the flue gas is high, and the effective gas composition is not high. At the same time, due to the suction generated by the flue gas introduction system, the oxygen content in the flue gas will be increased, which also poses a certain threat to the safe operation of the subsequent gas purification system.

For the purification of coke oven flue gas, usually due to the low temperature of coke oven flue gas, it is often necessary to use expensive catalysts with low denitration efficiency when denitrifying coke oven flue gas. It is necessary to increase the temperature of the coke oven flue gas by mixing the high-temperature waste gas generated by the combustion of the heating furnace gas into the coke oven flue gas, so as to meet the needs of using catalysts with high denitration efficiency and low price, which significantly increases the construction investment. and long-term operating energy consumption.

To sum up, in order to effectively avoid the above-mentioned problems caused by the control of coal charging smoke and dust during the coal charging process, and at the same time solve the problem of low coke oven flue gas temperature, improve the gas purification system's antegrade performance and tar quality, and promote coal humidity control and other energy saving. In order to promote the implementation of technology and improve the purification efficiency of coke oven flue gas, it is necessary to adopt a new technical route and technical means for the soot generated in the coal charging process, and develop a new coal charging soot treatment process.

SUMMARY OF THE INVENTION

The utility model provides a coupling system for the treatment of coal-loading smoke and dust in a top-loading coke oven and coke oven flue gas purification, which can effectively avoid the gas purification system and equipment that occur when the smoke and dust generated during the coal-charging process of the top-loading coke oven are introduced into the gas system. In order to improve the denitrification efficiency of coke oven flue gas and reduce the energy consumption of operation, it will promote the application of coal humidity control technology.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

Top-loading coke oven coal-loading soot treatment and coke oven flue gas purification coupling system, including flue gas tee A, flue gas tee B, flue gas combustion device, fan, coke oven flue gas desulfurization and denitrification device, coke oven flue gas waste heat Recovery device; the top of the carbonization chamber of the top-loading coke oven is provided with a rising pipe, the middle of the rising pipe is connected to the gas collecting pipe through a bridge pipe, and a gas cut-off valve is arranged on the bridge pipe; The first interface and the second interface through A are arranged opposite to each other, and the center connecting line of the two is coaxial with the axis of the rising pipe, the first interface is connected with the top opening of the rising pipe, and the second interface is provided with a water sealing valve; The first interface of the smoke guide tee is connected with the interface three of the smoke guide tee A through the connecting pipe one, and a flue gas cut-off valve is arranged on the connecting pipe one; The corresponding interfaces of the smoke guide tee B adjacent to the carbonization chamber are connected, and the corresponding interfaces of the smoke guide tee B of each carbonization chamber are connected in series to form a coal-loading soot pipe on the furnace top; Gas combustion device, fan, coke oven flue gas desulfurization and denitrification device, coke oven flue gas waste heat recovery device and chimney.

The flue gas combustion device is a flue gas combustion chamber with a volume of not less than 3 m ³ , and an ignition device and a combustion-supporting gas introduction port are arranged on the side wall of the flue gas combustion chamber.

The flue gas inlet of the coke oven flue gas desulfurization and denitrification device is connected to the general flue of the top-loading coke oven through the coke oven flue gas pipeline, and the combustion flue gas inlet is set 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 flue gas flow direction, the initial end of the coal-loading soot pipe on the top of the furnace is connected with the gas collecting pipe through a communication pipe, and a balance valve is arranged on the communication pipe.

It also includes a furnace top coal charging sealing device arranged on the furnace top coal charging vehicle, as shown in Figure 3 and Figure 4, the furnace top coal charging sealing device is a sleeve type furnace top coal charging sealing device, from the inside to the outside. The inner sleeve, the sliding sleeve, the sealing connection sleeve and the outer sleeve are arranged in sequence, the inner sleeve is a coal lowering channel, and the top of the inner sleeve is connected with the coal hopper discharge port of the coal charging truck; The inner sleeve slides vertically; the sealing connection sleeve is connected with the coal hopper through the outer sleeve, and the bottom end of the sealing connection sleeve is provided with a spherical structure to cooperate with the coal charging hole seat to seal the coal charging hole; There is a retractable flexible connection structure.

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

1) Improve the antegrade ability of the gas purification system and improve the quality of gas and tar;

By collecting and processing the flue gas with a large amount of coal dust generated when the coke oven is charged with coal, the flue gas carrying a large amount of coal dust is prevented from entering the gas purification system, and the resistance of the gas primary cooling device caused by the coal dust in the flue gas is eliminated. Increase the cooling capacity and reduce the factors, improve the forward capacity of the gas purification system, improve the quality of the gas and the quality of the collected tar, and reduce the production of tar residue.

2) Reduce the investment and operation cost of coal-loading soot control;

By separately collecting and processing the flue gas with a large amount of coal dust generated when the coke oven is charged with coal, the high-pressure ammonia, Proven, OPR and other anthracite coal charging systems are omitted, and the coal charging and dust removal system in the prior art is also not required to be constructed. It can significantly reduce the investment of project construction and the energy consumption of long-term operation of the system.

3) Make full use of gas resources, improve the efficiency of coke oven flue gas purification, and reduce the operating cost of coke oven flue gas purification;

The flue gas with a large amount of coal dust generated when the coke oven is charged with coal is separately collected and mixed into the coke oven flue gas after being burned. Reduce the operating cost of coke oven flue gas purification. On the other hand, the coke oven flue gas waste heat recovery device is used to recover the waste heat of the purified coke oven flue gas, which not only realizes the effective use of low-quality gas resources, but also reduces the high-quality coke oven gas resources. It can also effectively recover waste heat and waste energy.

4) Improve the safety of gas purification system operation;

Compared with the prior art process of introducing the flue gas generated during coal charging into the gas purification system by utilizing the suction generated by high-pressure ammonia water injection or increasing the suction in the gas collecting pipe, the utility model utilizes the fan to charge the coke oven with the gas generated during coal charging. The flue gas with a large amount of coal dust is collected and processed separately, and it is not necessary to consider the problem that the oxygen content entering the gas purification system exceeds the standard due to the excessive suction of the flue gas collection system, which poses a serious threat to the safety of the gas purification system. While effectively capturing the generated smoke and dust, the operation safety of the gas purification system is improved.

5) It is beneficial to the application and promotion of coal humidity control technology;

By collecting the flue gas with a large amount of coal dust generated when the coke oven is charged with coal separately, the influence of a large increase in the coal dust in the flue gas generated when the coal is charged due to the implementation of the coal humidity control technology on the gas purification system is eliminated. The "side effects" produced by the implementation of the humidity control technology restrict the application of the coal humidity control process, which will be beneficial to the application and promotion of the coal humidity control process.

Description of drawings

FIG. 1 is a schematic structural diagram of the coupling system of the top-loading coke oven charging soot treatment and coke oven flue gas purification according to the present invention.

Figure 2 is a schematic diagram of the connection relationship between the riser pipe and the gas collecting pipe and the furnace top coal-loading smoke guide pipe according to the present invention.

Fig. 3 is a schematic diagram 1 (before coal charging) of the working state of the furnace top coal charging sealing device according to the present invention.

Fig. 4 is the schematic diagram 2 of the working state of the furnace top coal charging sealing device according to the present utility model (in the process of charging coal).

In the figure: 1. Top-loading coke oven 2. Coal-loading sealing device on the top of the furnace 21. Coal hopper 22. Inner sleeve 23. Sliding sleeve 24. Sealing connection sleeve 25. Outer sleeve 26. Retractable flexible connection structure 27 .Spherical structure 3. Rising pipe 4. Gas cut-off valve 5. Flue gas guide tee A 6. Flue gas cut-off valve 7. Smoke guide tee B 8. Flue gas combustion device 9. Fan 10. Coke oven flue gas desulfurization and denitrification device 11. Coke oven flue gas waste heat recovery device 12. Balance valve 13. Soot conveying pipeline 14. Chimney 15. Gas collecting pipe 16. Water sealing valve 17. Coal into the furnace 18. Coal loading hole

Detailed ways

The specific embodiments of the present utility model will be further described below in conjunction with the accompanying drawings:

As shown in Figures 1 and 2, the top-loading coke oven coal-loading soot treatment and coke oven flue gas purification coupling system of the present invention includes a smoke-conducting tee A5, a smoke-conducting tee B7, and a flue gas combustion device. 8. Fan 9, coke oven flue gas desulfurization and denitrification device 10, coke oven flue gas waste heat recovery device 11; the top of the carbonization chamber of the top-mounted coke oven 1 is provided with a rising pipe 3, and the middle of the rising pipe 3 is connected to the gas collecting pipe 15 through a bridge pipe, A gas cut-off valve 4 is arranged on the bridge pipe; a smoke guide tee A5 is arranged on the top of the riser pipe 3, and the first and second interfaces of the smoke guide tee A5 are arranged oppositely, and the central connection line of the two is connected to the riser pipe 3 The axis of the pipe is coaxial, the first interface is connected with the top opening of the rising pipe 3, and the second interface is provided with a water seal valve 16; A flue gas cut-off valve 6 is set on the first connecting pipe; the second and third interfaces of the smoke guiding tee B7 are respectively connected with the corresponding interfaces of the smoke guiding tee B7 of the adjacent carbonization chamber on the corresponding side through the connecting pipe two, and each carbonization The corresponding interfaces of the smoke-conducting tee B7 of the chamber are connected in series to form a furnace top-loading coal-loaded soot pipeline; the furnace-top coal-loaded soot pipeline is sequentially connected to the flue gas combustion device 8, the fan 9, and the coke oven flue gas desulfurization through the soot conveying pipeline 13. The denitration device 10 , the coke oven flue gas waste heat recovery device 11 and the chimney 14 .

The gas shut-off valve 4 can be a water-sealing valve in the prior art, or can be any form of device capable of conducting and shutting off the gas passage between the riser 3 and the gas collecting pipe 15 by opening and closing. The water seal valve 16 adopts the conventionally used riser water seal valve.

The first connecting pipe and the soot conveying pipe 13 are all inclined, which can prevent the coal dust in the soot from loading coal from depositing in the soot passage and block the soot passage.

The flue gas combustion device 8 is a flue gas combustion chamber with a volume of not less than 3 m ³ , and an ignition device and a combustion-supporting gas inlet are provided on the side wall of the flue gas combustion chamber. The coal-loading soot enters the flue gas combustion chamber of the flue gas combustion device 8 under the action of the fan 9, and the mixture of the coal-loading soot and the introduced combustion-supporting gas is ignited by the ignition device. The high-temperature waste gas and the dust remaining from the combustion of coal dust settle to the bottom in the flue gas combustion chamber, and the high-temperature waste gas is combined with the coke oven flue gas produced by the combustion of the coke oven heating system through the flue dust conveying pipeline 13 .

The flue gas inlet of the coke oven flue gas desulfurization and denitrification device 10 is connected to the general flue of the top-loading coke oven 1 through the coke oven flue gas pipeline, and combustion smoke is installed on the coke oven flue gas pipeline close to the coke oven flue gas desulfurization and denitrification device 10. The gas inlet, 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 flow direction of the flue gas, the initial end of the coal-loading soot pipe on the top of the furnace is connected with the gas collecting pipe 15 through a communication pipe, and a balance valve 12 is arranged on the communication pipe. By setting the balance valve 12, the possible surge problem of the fan 9 during operation is eliminated, and the safe and stable operation of the fan 9 is guaranteed.

The top-loading coke oven coal-loading soot treatment and coke oven flue gas purification coupling system of the utility model further comprises a furnace-top coal-loading sealing device 2 arranged on the furnace-top coal-charging vehicle. The furnace-top coal-loading sealing device 2 It is a sleeve type furnace top coal charging sealing device, which consists of an inner sleeve 22, a sliding sleeve 23, a sealing connection sleeve 24 and an outer sleeve 25 which are sequentially arranged from the inside to the outside. The inner sleeve 22 is the lower coal passage. , the top of which is connected with the discharge port of the coal hopper 21 of the coal charging truck; the sliding sleeve 23 can slide vertically along the inner sleeve 22; the sealing connection sleeve 24 is connected with the coal hopper 21 through the outer sleeve 25, and the sealing connection sleeve The bottom end of the barrel 24 is provided with a spherical surface structure 27 to cooperate with the coal charging hole seat to seal the coal charging hole 18 ; the outer sleeve 25 is provided with a retractable flexible connection structure 26 .

During coal charging, the soot generated in the carbonization chamber cannot escape from the coal charging hole 18 under the action of the spherical seal between the bottom end of the sealing connection sleeve 24 and the coal charging hole seat and the negative pressure caused by the fan 9, thereby realizing coal charging Process of anthracite charging. Different from the existing furnace top coal charging sealing device, the utility model adopts the form of the sealing connecting sleeve 24 and the spherical surface of the coal charging hole seat to cooperate and seal, which can effectively prevent the coal charging smoke and dust from escaping. The inhalation of ambient air during the capture process improves the safety of the coal-loading soot capture and treatment system.

The outer sleeve 25 can also be provided with a fume and dust lead-out port, and the annular channel between the sliding sleeve 23 and the sealed connection sleeve 24 is used as a fume guide channel, and is connected to the fume and dust collection pipe on the coal charging truck through the fume and dust lead-out port, The smoke and dust collection duct is additionally connected to the flue gas combustion device 8 .

The technical process of the top-loading coke oven loading coal soot treatment and coke oven flue gas purification coupling system of the utility model is as follows:

1) Before starting the coal charging operation into the carbonization chamber, the riser pipe 3 corresponding to the carbonization chamber is cut off from the gas collecting pipe 15 by closing the gas shut-off valve 4 on the bridge pipe, and the water seal valve 16 is closed at the same time to isolate the riser pipe 3 from the atmosphere, To avoid the coal loading smoke and dust generated during coal loading from entering the gas purification system by mistake;

2) The top coal charging truck is moved to the top of the coalification chamber to be loaded. After opening the corresponding coal charging hole cover of the carbonization chamber, the sliding sleeve 23 and the sealing connection sleeve 24 are lowered, and the sliding sleeve 23 and the sealing connection sleeve 24 are lowered. The spherical sealing structure composed of the spherical surface structure 27 and the coal charging hole seat seals the coal charging hole 18; it ensures that the coal charging soot generated in the carbonization chamber during coal charging escapes to the surroundings of the top charging coke oven 1 through the coal charging hole 18 and causes environmental pollution;

3) Open the flue gas cut-off valve 6 corresponding to the coalification chamber to be installed, so that the rising pipe 3 is connected with the coal smoke and dust pipeline on the top of the furnace; at this time, under the action of the fan 9, a certain negative pressure is formed in the carbonization chamber, and there are It is conducive to the effective capture of the coal loading smoke and dust generated during coal loading;

4) Under the action of the fan 9, a large amount of smoke and dust generated during coal charging enters the flue gas through the riser pipe 3, the smoke guide tee A 5, the flue gas cut-off valve 6, the smoke guide tee B 7, and the coal-loading smoke and dust pipe on the top of the furnace. Combustion device 8, in the flue gas combustion device 8, the coal dust and combustible components in the flue gas undergo a combustion reaction with the introduced combustion-supporting gas, and the generated high-temperature flue gas enters the coke oven flue gas desulfurization and denitration device 10 under the action of the fan 9 The upstream coke oven flue gas pipeline is mixed with coke oven flue gas to raise the temperature of coke oven flue gas and then enter the coke oven flue gas desulfurization and denitrification device 10 for desulfurization and denitrification treatment, and the purified flue gas enters the coke oven flue gas The waste heat recovery device 11 recovers the waste heat, and then discharges it through the chimney 14;

Since the temperature of the mixed coke oven flue gas has a certain increase, it is beneficial to use a denitration catalyst with higher catalytic efficiency and more stable and reliable operation, which can improve the denitration effect and reduce the operating cost of the denitration system. The purified coke oven flue gas enters the coke oven flue gas waste heat recovery device 11 to recover waste heat;

5) After the coal charging is completed, the sliding sleeve 23 and the sealing connection sleeve 24 are lifted, the furnace top coal charging truck is driven away, and the corresponding coal charging hole 18 is sealed through the coal charging hole cover; at this time, the corresponding gas shut-off valve is opened 4. Reconnect the rising pipe 3 with the gas collecting pipe 15; close the previously opened flue gas shut-off valve 6 to cut off the passage between the rising pipe 3 and the furnace top coal-loading soot pipe. At this time, the coal material in the carbonization chamber enters the dry distillation process in an oxygen-free environment. When the coal material is stable, the gas produced by dry distillation carries only a small amount of dust. Therefore, the gas introduced into the gas purification system during the non-coal charging period will be used for subsequent purification. The adverse effects of dust in treatment facilities will be basically eliminated, and the quality of tar will also be greatly improved.

When the furnace top coal charging sealing device 2 with the soot collecting pipe is used, during the coal charging process, a part of the soot at the coal charging hole 18 is led out from the flue guide channel between the sliding sleeve 23 and the sealing connection sleeve 24, and is collected by the soot. The pipeline is sent into the flue gas combustion device 8 for purification treatment.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

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.

Images