CN110746993A - Coupling system and process of tamping coke oven charging soot treatment and coke oven flue gas purification - Google Patents

Abstract

The invention relates to a system and a process for coupling coal-charging smoke dust treatment and coke oven flue gas purification of a tamping coke oven, wherein a rising pipe is arranged at the top of a carbonization chamber of the tamping coke oven, the middle part of the rising pipe is connected with a gas collecting pipe through a bridge pipe, and a gas cut-off valve is arranged on the bridge pipe; a smoke guide tee joint A is arranged at the top of the ascending pipe and is connected with a smoke guide tee joint B through a first connecting pipeline, and a smoke stop valve is arranged on the first connecting pipeline; the smoke guide tee joints B of all the carbonization chambers are connected and form a furnace top coal charging smoke dust pipeline; the furnace top coal charging smoke dust 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. The invention can effectively avoid the problems of unfavorable smooth operation of a gas purification system and equipment, reduced quality of tar products and the like caused by the introduction of smoke dust generated in the coal charging process of the tamping coke oven into a gas system, improve the denitration efficiency of the coke oven flue gas and reduce the operation energy consumption.

Description

Coupling system and process of tamping coke oven charging soot treatment and coke oven flue gas purification

technical field

The invention relates to the technical field of coal coking, in particular to a coupling system and process for the treatment of tamping coke oven coal fume dust and coke oven fume purification.

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. The smoke and dust generated during coal charging are led to the adjacent carbonization chamber and then enter the gas purification system. Combined with the process of collecting the smoke and dust from the top of the furnace and the smoke and dust from the furnace door on the side of the machine, they are purified by the coal-charging dust removal system.

Proven, OPR and other anthracite coal charging processes are to increase the suction force of the coke oven gas gas collecting pipe, form a slight negative pressure in the carbonization chamber, and pass a large amount of smoke and dust generated during coal charging through the rising pipe, which is connected to the coke oven gas gas collecting pipe. The bridge pipe is introduced into the gas collecting pipe, so as to realize the anthracite 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.

High-pressure ammonia water jet is used to guide the smoke and dust generated during coal charging to the adjacent carbonization chamber and then enter the gas purification system. Combined with the process of collecting the smoke and dust from the top of the furnace and the smoke and dust from the furnace door on the side of the machine, the coal-charging dust removal system is used for purification. On the one hand, it is necessary to connect the smoke guide hole at the top of the carbonization chamber with the smoke guide hole at the top of the adjacent carbonization chamber by using a U-shaped pipe smoke guide vehicle during coal charging, so as to introduce the smoke and dust generated during coal charging into the adjacent carbonization chamber. The coal charging smoke and dust collection facility installed on the coal charging truck or above the furnace door on the side of the machine is used to capture the escaping coal charging smoke and dust, and then the captured smoke and dust are sent to the coal charging dust removal system through the dust removal pipeline for purification. To this end, it is necessary to build a corresponding coal-loading smoke guide vehicle, a coal-loading and dust-removing ground station system or a vehicle-mounted coal-loading and dust-removing system, and a certain amount of power media such as water, compressed air, steam, and electric energy are also consumed during operation. The efficiency of the set is not satisfactory. 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.

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.

On the other hand, when the coke oven flue gas is currently purified, usually due to the low temperature of the coke oven flue gas, it is often necessary to use expensive catalysts with low denitration efficiency in the denitration of the coke oven flue gas. In order to meet the requirements of using catalysts with high denitration efficiency and low price, it is often necessary to increase the temperature of the coke oven flue gas by mixing the high temperature waste gas generated by the combustion gas of the heating furnace into the coke oven flue gas. Significantly increased 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 forward performance and tar quality, and improve coke oven flue gas purification. To improve the efficiency, it is necessary to adopt new technical routes 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 invention provides a coupling system and process for the treatment of fume and dust from tamping coke oven coal charging and coke oven flue gas purification, which can effectively avoid the gas purification system and equipment that occur when the fume and dust generated in the process of tamping coke oven coal charging are introduced into the gas system Problems such as unfavorable forward movement and reduced quality of tar products can improve the denitrification efficiency of coke oven flue gas and reduce operating energy consumption.

In order to achieve the above object, the present invention adopts the following technical solutions to realize:

Coupling system of tamping coke oven charging soot treatment and coke oven flue gas purification, including machine-side furnace door sealing device, gas cut-off valve, flue gas cut-off valve, flue gas cut-off valve B, flue gas combustion device , fan, coke oven flue gas desulfurization and denitrification device, coke oven flue gas waste heat recovery device and chimney; the top of the carbonization chamber of the tamping coke oven is provided with a rising pipe, and the middle of the rising pipe is connected to the gas collecting pipe through a bridge pipe, and a gas pipe is installed on the bridge pipe. Cut-off valve; the top of the rising pipe is provided with a smoke guide tee A, one of the two interfaces arranged opposite to the smoke guide tee A is connected to the top opening of the riser, and the other interface is provided with a water seal valve; the smoke guide tee The third interface of A is connected to an interface of the smoke guide tee B through the connecting pipe 1, and a smoke cut-off valve is set on the connecting pipe 1; The corresponding interfaces of the flue-conducting tee B set in the carbonization chamber are connected to form a coal-loading soot pipe on the furnace top; A furnace flue gas waste heat recovery device and a chimney; the machine-side furnace door sealing device is arranged on a coal charging truck, and can form a sealing structure with the machine-side furnace door frame during coal charging.

The flue gas inlet of the coke oven flue gas desulfurization and denitrification device is connected to the general flue of the tamping 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.

The machine-side furnace door sealing device is a closed cover enclosed by an upper sealing plate, a lower sealing plate, a side sealing plate, a front sealing plate and a rear support plate, and the front sealing plate is provided with an opening for the briquettes to pass through. , the number of the back support plates is two, and the distance between the two back support plates toward the center side is greater than the width of the carbonization chamber.

Along the flow direction of the flue gas, a communication pipe is arranged between the initial end of the coal smoke and dust pipe on the top of the furnace and the gas collecting pipe, and a balance valve is arranged on the communication pipe.

The flue gas combustion device is a flue gas combustion chamber with a volume of not less than 3 m ³ , and is equipped with an ignition device and a combustion-supporting gas inlet.

The coupling process of tamping coke oven charging soot treatment and coke oven flue gas purification includes the following steps:

1) Before starting the coal charging operation into the carbonization chamber, cut off the riser pipe of the corresponding carbonization chamber from the gas collecting pipe by closing the gas shut-off valve on the bridge pipe, and at the same time close the corresponding water seal valve to isolate the riser pipe from the atmosphere;

2) The sealing device of the furnace door on the machine side is tightly fitted with the door frame of the furnace on the machine side by the driving device arranged on the coal charging truck;

3) Open the flue gas cut-off valve corresponding to the coalification chamber to be installed, so that the rising pipe is connected to the coal-loading smoke and dust pipeline on the top of the furnace;

4) Under the action of the fan, a large amount of smoke and dust generated when the briquettes are fed into the carbonization chamber enter the flue gas through the rising pipe, the smoke guide tee A, the flue gas cut-off valve, the smoke guide tee B, and the coal-loading soot pipe on the top of the furnace. Combustion device; in the flue gas combustion device, the coal dust and combustible components in the flue gas undergo a combustion reaction with the combustion-supporting gas, and the high-temperature flue gas generated after combustion enters the coke oven flue gas upstream of the flue gas desulfurization and denitrification device under the action of the fan The pipe is mixed with coke oven flue gas to increase the temperature of coke oven flue gas, and then enters into the coke oven flue gas desulfurization and denitrification device for desulfurization and denitrification treatment. The purified flue gas enters the coke oven flue gas waste heat recovery device to recover waste heat , the purified flue gas after recovery of waste heat is discharged through the chimney;

5) After coal loading, the furnace door sealing device on the machine side is separated from the furnace door frame on the machine side, the furnace door on the machine side is closed, and then the corresponding gas shut-off valve is opened to reconnect the rising pipe of the carbonization chamber with the gas collecting pipe; The flue gas shut-off valve cuts off the passage between the riser pipe and the coal-loading soot pipe on the top of the furnace.

Compared with the prior art, the beneficial effects of the present invention 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, the high-pressure ammonia water, Proven, OPR and other anthracite coal charging systems, coal charging smoke guide trucks, furnace top smoke guide holes and other facilities are omitted. There is also no need to build the coal charging and dust removal system in the prior art, which can significantly reduce the investment in project construction and the energy consumption for 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 force generated by high-pressure ammonia water injection or increasing the suction force in the gas collecting pipe, the present invention utilizes the fan to charge the coke oven with coal-containing gas. The flue gas of 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 caused by the excessive suction of the flue gas collection system, which poses a serious threat to the safety of the gas purification system. The generated smoke and dust are effectively captured, and at the same time, the operation safety of the gas purification system is improved.

Description of drawings

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

Fig. 2 is a schematic diagram of the connection relationship between the riser pipe, the gas collecting pipe and the furnace top coal soot loading pipe according to the present invention.

FIG. 3 is a schematic view of the working state of the machine-side furnace door sealing device according to the present invention.

4 is a schematic structural diagram of the machine-side furnace door sealing device according to the present invention.

In the picture: 1. Tamping coke oven 2. Machine side furnace door sealing device 21. Upper sealing plate 22. Lower sealing plate 23. Side sealing plate 24. Front sealing plate 25. Rear support plate 3. Rising pipe 4. Gas cut off Valve 5. Smoke guide tee A 6. Flue gas cut-off valve 7. Smoke guide tee B8. 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. Dust conveying pipe 14. Chimney 15. Gas collecting pipe 16. Water seal valve 17. Machine side furnace door frame 18. Machine side furnace column 19. Coal cake

Detailed ways

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

As shown in Figures 1 and 2, the coupling system for tamping coke oven coal soot treatment and coke oven flue gas purification according to the present invention includes a machine-side furnace door sealing device 2, a gas cut-off valve 4, and a flue gas guide tee A5. , flue gas cut-off valve 6, flue gas guide tee B 7, flue gas combustion device 8, fan 9, coke oven flue gas desulfurization and denitration device 10, coke oven flue gas waste heat recovery device 11 and chimney 14; The top of the carbonization chamber is provided with an ascending pipe 3, the middle of the ascending pipe 3 is connected with the gas collecting pipe 15 through a bridge pipe, and a gas cut-off valve 4 is provided on the bridge pipe; the top of the ascending pipe 3 is provided with a smoke guide tee A5, and a smoke guide tee A5 One of the 2 interfaces that are arranged oppositely is communicated with the top opening of the rising pipe 3, and the other interface is provided with a water seal valve 16; One interface of 7 is connected to each other, and a flue gas cut-off valve 6 is set on the first connecting pipe; the corresponding interfaces of the smoke guiding tee B 7 set in the adjacent carbonization chamber respectively pass through the connecting pipe two and the 2 interfaces that are oppositely arranged in the smoke guiding tee B 7 Connected to form a furnace top-loading coal smoke and dust pipeline; the furnace top-loaded coal smoke and dust pipeline is sequentially connected to the flue gas combustion device 8, the fan 9, the coke oven flue gas desulfurization and denitrification device 10, the coke oven flue gas waste heat recovery device 11 and the Chimney 14; the machine-side furnace door sealing device 2 is provided on the coal charging truck, and can form a sealing structure with the machine-side furnace door frame 17 during coal charging (as shown in FIG. 3).

The machine-side furnace door sealing device 2 is installed on the coal-charging truck, and is covered on the machine-side furnace door frame 17 when the coal cake 19 is fed into the carbonization chamber through the drive device arranged on the coal-charging truck, and is installed in the carbonization chamber. A closed space is formed outside the furnace mouth of the machine side, and this space only allows the coal cake 19 to pass through, which can effectively prevent the coal-loading soot from escaping from the furnace mouth of the machine side during coal charging.

Different from the existing machine-side furnace door sealing device, the machine-side furnace door sealing device 2 of the present invention is directly covered on the machine-side furnace door frame 17 instead of being provided on the machine-side furnace column 18 . At present, the commonly used machine-side furnace door sealing device cover is set on the machine-side furnace column 18, and an upper and lower open space is formed between the machine-side furnace mouth and the machine-side furnace door sealing cover. The upper open space is connected to the furnace column above the furnace door. The machine-side furnace door smoke and dust collection hoods are connected between them. Under the action of the dust removal ground station fan, a large amount of ambient air will be inhaled from the open space below. This ambient air will merge with the smoke and dust escaping from the machine-side furnace mouth during the rising process. Afterwards, it enters the dust removal ground station through the fume and dust collection hood of the furnace door on the side of the machine. However, the present invention adopts the machine-side furnace door sealing device 2 directly covered on the machine-side furnace door frame 17, which is closed up and down, left and right, and has only one opening for the briquettes 19 to pass through, which can effectively seal the smoke and dust generated in the carbonization chamber. In the carbonization chamber, under the action of the fan 9, a sufficient negative pressure is generated at the gap between the furnace door sealing device 2 and the coal cake 19 on the side of the machine, which can effectively prevent the escape of smoke and dust, reduce the incorporation of ambient air, and improve the performance of the furnace. Safety of coal soot collection systems.

The soot conveying channel 13 is inclined at a certain angle to the horizontal plane, so as to prevent the coal dust in the coal-loading soot from depositing in the pipeline and causing it to be blocked.

By setting the balance valve 12, the possible surge problem of the fan 9 during operation can be eliminated, and the safe and stable operation of the fan 9 can be ensured.

The flue gas inlet of the coke oven flue gas desulfurization and denitrification device 10 is connected to the general flue of the tamping 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.

As shown in FIG. 4 , the machine-side furnace door sealing device 2 is a closed cover body surrounded by an upper sealing plate 21 , a lower sealing plate 22 , a side sealing plate 23 , a front sealing plate 24 and a rear supporting plate 25 . The front sealing plate 24 is provided with an opening for the briquettes 19 to pass through, the rear support plates 25 are two, and the distance between the two rear support plates 25 toward the center side is greater than the width of the carbonization chamber.

Along the flow direction of the flue gas, a communication pipe is set between the initial end of the coal-loading soot pipe on the top of the furnace and the gas collecting pipe 15 , and a balance valve 12 is set on the communication pipe.

The flue gas combustion device 8 is a flue gas combustion chamber with a volume of not less than 3 m ³ , and is equipped with an ignition device and a combustion-supporting gas inlet. The coal-loading soot enters the flue gas combustion chamber 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 dust remaining from the combustion settles to the bottom in the flue gas combustion chamber, and the high temperature flue gas is combined with the coke oven flue gas produced by the combustion of the coke oven heating system through the flue dust conveying pipe 13 .

The coupling process of tamping coke oven charging soot treatment and coke oven flue gas purification includes the following steps:

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 cut-off valve 4 on the bridge pipe, and the corresponding water seal valve 16 is closed at the same time, so that the riser pipe 3 is connected to the atmosphere. Isolation; avoid coal loading smoke and dust generated during coal loading from entering the gas purification system by mistake;

2) The machine-side furnace door sealing device 2 is tightly fitted with the machine-side furnace door frame 17 through the drive device arranged on the coal-charging vehicle; it is ensured that the coal-loading smoke and dust generated in the carbonization chamber during coal charging escape through the machine-side furnace mouth of the carbonization chamber. to the coke oven and cause 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 to the coal-loading smoke and dust pipeline on the furnace top; at this time, under the action of the fan 9, a certain negative pressure is formed in the carbonization chamber, which is conducive to the installation of coal gas. The coal loading smoke and dust generated when coal is effectively captured;

4) Under the action of the fan 9, a large amount of smoke and dust generated when the briquettes 19 are fed into the carbonization chamber pass through the rising pipe 3, the smoke guide tee A 5, the flue gas cut-off valve 6, the smoke guide tee B 7, and the furnace top installation in turn. The coal soot pipeline enters the flue gas 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 combustion-supporting gas, and the high-temperature flue gas generated after combustion enters the flue gas under the action of the fan 9 The coke oven flue gas pipeline upstream of the desulfurization and denitrification device 10 is mixed with the coke oven flue gas to increase the temperature of the coke oven flue gas, and then enters the coke oven flue gas desulfurization and denitrification device 10 for desulfurization and denitrification treatment. The gas enters the coke oven flue gas waste heat recovery device 11 to recover the waste heat, and the purified flue gas after recovery of the waste heat is discharged through the chimney exhaust 14; since the temperature of the mixed coke oven flue gas is increased to a certain extent, it is beneficial to adopt higher catalytic efficiency and more efficient operation. The stable and reliable denitration catalyst can improve the denitration effect and reduce the operating cost of the denitration system.

5) After the coal loading is completed, the machine side furnace door sealing device 2 is separated from the machine side furnace door frame 17, the machine side furnace door is closed, and then the corresponding gas shut-off valve 4 is opened, so that the rising pipe 3 of the carbonization chamber is reconnected with the gas collecting pipe 15. ; Close the previously opened flue gas cut-off valve 6 to cut off the passage between the rising pipe 3 and the coal-loading soot pipe on the top of the furnace. At this time, the coal cake 19 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 only carries very little dust. The detrimental effects of dust caused by the purification treatment facilities of the tar are basically eliminated, and the quality of tar will also be greatly improved.

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. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (6)

1. The coupling system of tamping coke oven loading soot treatment and coke oven flue gas purification, is characterized in that, comprises machine side furnace door sealing device, gas shut-off valve, flue gas tee A, flue gas shut-off valve, 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 and chimney; the top of the carbonization chamber of the tamping coke oven is provided with a rising pipe, and the middle of the rising pipe is connected to the gas collecting pipe through a bridge pipe , the bridge pipe is provided with a gas shut-off valve; the top of the riser pipe is provided with a smoke guide tee A, one of the two interfaces set opposite the smoke guide tee A is connected to the top opening of the riser pipe, and the other interface is provided with a water seal valve; the third interface of the smoke guide tee A is connected to an interface of the smoke guide tee B through the connecting pipe 1, and a flue gas cut-off valve is set on the connecting pipe 1; the two opposite interfaces of the smoke guide tee B pass through The second connecting pipe is connected with the corresponding interface of the smoke-conducting tee B set in the adjacent carbonization chamber to form a coal-loading smoke and dust pipe on the furnace top; A gas desulfurization and denitrification device, a coke oven flue gas waste heat recovery device and a chimney; the machine-side furnace door sealing device is arranged on the coal charging truck, and can form a sealing structure with the machine-side furnace door frame during coal charging. 2. The coupling system for tamping coke oven soot treatment and coke oven flue gas purification according to claim 1, wherein the flue gas inlet of the coke oven flue gas desulfurization and denitrification device is connected through a coke oven flue gas pipeline The general flue of the tamping coke oven, and the coke oven flue gas pipeline near the coke oven flue gas desulfurization and denitrification device is provided with a combustion flue gas inlet. The flue gas inlet is connected. 3 . The coupling system for tamping coke oven coal-loading soot treatment and coke oven flue gas purification according to claim 1 , wherein the machine-side furnace door sealing device is composed of an upper sealing plate, a lower sealing plate, and a side sealing plate. 4 . A closed cover body enclosed by a plate, a front sealing plate and a rear support plate. The front sealing plate is provided with an opening for the briquettes to pass through. The spacing is greater than the width of the carbonization chamber. 4. The coupling system for tamping coke oven coal-loading soot treatment and coke oven flue gas purification according to claim 1, wherein, along the flue gas flow direction, the starting end of the furnace top coal-loading soot pipe is connected to a gas collecting pipe A communication pipe is arranged between, and a balance valve is arranged on the communication pipe. 5. The coupling system for tamping coke oven loading soot treatment and coke oven flue gas purification according to claim 1, wherein the flue gas combustion device is a flue gas combustion chamber with a volume of not less than ³ m, and is configured with a Fire device and combustion-supporting gas inlet. 6. based on the described system of claim 1, the tamping coke oven loading soot treatment and coke oven flue gas purification coupling process, is characterized in that, comprises the steps: 1) Before starting the coal charging operation into the carbonization chamber, cut off the riser pipe of the corresponding carbonization chamber from the gas collecting pipe by closing the gas shut-off valve on the bridge pipe, and at the same time close the corresponding water seal valve to isolate the riser pipe from the atmosphere; 2) The sealing device of the furnace door on the machine side is tightly fitted with the door frame of the furnace on the machine side by the driving device arranged on the coal charging truck; 3) Open the flue gas cut-off valve corresponding to the coalification chamber to be installed, so that the rising pipe is connected to the coal-loading smoke and dust pipeline on the top of the furnace; 4) Under the action of the fan, a large amount of smoke and dust generated when the briquettes are fed into the carbonization chamber enter the flue gas through the rising pipe, the smoke guide tee A, the flue gas cut-off valve, the smoke guide tee B, and the coal-loading soot pipe on the top of the furnace. Combustion device; in the flue gas combustion device, the coal dust and combustible components in the flue gas undergo a combustion reaction with the combustion-supporting gas, and the high-temperature flue gas generated after combustion enters the coke oven flue gas upstream of the flue gas desulfurization and denitrification device under the action of the fan The pipe is mixed with coke oven flue gas to increase the temperature of coke oven flue gas, and then enters into the coke oven flue gas desulfurization and denitrification device for desulfurization and denitrification treatment. The purified flue gas enters the coke oven flue gas waste heat recovery device to recover waste heat , the purified flue gas after recovery of waste heat is discharged through the chimney; 5) After coal loading, the furnace door sealing device on the machine side is separated from the furnace door frame on the machine side, the furnace door on the machine side is closed, and then the corresponding gas shut-off valve is opened to reconnect the rising pipe of the carbonization chamber with the gas collecting pipe; The flue gas shut-off valve cuts off the passage between the riser pipe and the coal-loading soot pipe on the top of the furnace.

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