Top-charging coke oven coal charging flue gas treatment system and method

Abstract

The invention relates to a top-charging coke oven coal charging flue gas treatment system and method, and the top-charging coke oven coal charging flue gas treatment system comprises a negative pressure smoke suction device, a furnace top coal charging dust removal vehicle, a matched flue gas treatment device, a sealed coal charging and flue gas guiding device, and a coal leveling port external escaping flue gas collection treatment device. According to the design of the top-charging coke oven, multi-dimensional and comprehensive dust removal measures are adopted, the problem that smoke escapes when the top-charging coke oven is charged with coal is effectively solved, and the top-charging coke oven has the advantages of being energy-saving, environment-friendly, safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of coke oven coking, and in particular to a top-loading coke oven coal-charged flue gas treatment system and method. Background Art

[0002] Currently, when top-loading coke ovens are used both domestically and internationally, coal is fed quantitatively from the top of the oven. As the coal descends, it generates a large amount of flue gas, which leads to increased pressure in the carbonization chamber and a large amount of escaping smoke with a complex composition. There has been no thorough and effective way to deal with this escaping smoke, a major factor restricting the development of the top-loading coking industry. With the increasing environmental protection requirements at this stage, the need to solve this industry-wide problem has become more urgent.

[0003] Currently, the flue gas treatment methods used by large domestic top-loading coke ovens primarily involve combustion, mixing with large amounts of air and then sending the gas to a ground station for treatment, or using negative pressure suction to enter the gas collection pipe. The disadvantages of using a ground station are that tar often clogs the bag filter or burns the bags due to high temperatures; the combustion and water washing process causes secondary pollution, consumes a lot of energy, and affects the environment and safety; and most importantly, the treatment effect is not very good. Using negative pressure suction to enter the gas collection pipe, the carbonization chamber pressure will fluctuate at the beginning or end of coal loading. The transient high pressure phenomenon can cause smoke to emerge from the coal loading port or the flat coal rod mouth, causing environmental pollution. Current technology cannot completely eliminate flue gas escape. Summary of the Invention

[0004] The present invention provides a top-charged coke oven coal-charging flue gas treatment system and method. The system is designed for top-charged coke ovens and adopts multi-dimensional and comprehensive dust removal measures to effectively solve the problem of flue gas leakage when the top-charged coke ovens are charged with coal. The system has the advantages of energy saving, environmental protection, safety and reliability.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A top-loaded coke oven coal charging flue gas treatment system, comprising a negative pressure smoking device, a furnace top coal loading and dust removal vehicle and a matching flue gas treatment device, a sealed coal loading and flue gas outlet device, and a flat coal outlet flue gas collection and treatment device; the negative pressure smoking device comprises a high-pressure ammonia water injection device arranged on a coke oven machine side bridge pipe, the bridge pipe is connected between the coke oven riser and the gas collecting pipe, and the gas collecting pipe is also connected to a chemical product recovery system; the furnace top coal loading and dust removal vehicle and the matching flue gas treatment device are arranged on the coke oven top, the sealed coal loading and flue gas outlet device is arranged on the furnace top coal loading and dust removal vehicle, the sealed coal loading and flue gas outlet device comprises a coal loading inner guide sleeve and a smoke guide outer guide sleeve, the smoke guide outer guide sleeve is arranged on the periphery of the coal loading inner guide sleeve, the coal loading inner guide sleeve is sealed and docked with the corresponding furnace top coal loading port during coal loading, and the smoke guide outer guide sleeve is sealed and docked with the furnace top; the flat coal outlet flue gas collection and treatment device is arranged at the furnace head flat coal outlet.

[0007] The sealed coal loading and flue gas outlet device consists of a coal loading inner guide sleeve, an inner guide sleeve sealing structure, a smoke guiding outer guide sleeve and an outer guide sleeve sealing structure; the inner guide sleeve sealing structure is arranged on the bottom periphery of the coal loading inner guide sleeve; the outer guide sleeve sealing structure is arranged on the bottom periphery of the smoke guiding outer guide sleeve.

[0008] The inner coal-loading guide sleeve and the outer smoke-guiding guide sleeve are both telescopic structures.

[0009] The device for collecting and treating the flue gas escaping from the coal outlet is composed of a flue gas collection hood, a flue gas collection pipe and a flue gas purification device. When coal is flat, the flue gas collection hood is placed outside the coal outlet of the burner head, and the flue gas collection hood is connected to the flue gas purification device through the flue gas collection pipe.

[0010] The smoke collection pipe is a telescopic hose.

[0011] A method for treating flue gas from a top-loading coke oven includes the following steps:

[0012] 1) When the top-loading coke oven is being charged with coal, the top-loading coal-dust removal vehicle moves to the top of the corresponding carbonization chamber and docks with the coal loading port of the corresponding carbonization chamber through the sealed coal loading and flue gas outlet device. The coal carried by the top-loading coal-dust removal vehicle enters the corresponding carbonization chamber through the coal loading inner guide sleeve. During coal loading, the high-pressure ammonia injection device is activated to generate negative pressure by injecting high-pressure ammonia. During the coal loading process, the flue gas in the carbonization chamber is introduced into the gas collecting pipe through the riser and sent to the chemical product recovery system for subsequent treatment.

[0013] 2) Most of the flue gas generated during coal loading enters the gas collecting pipe, while a small part of the flue gas escapes from the inner guide sleeve sealing device into the outer guide sleeve. The flue gas escaping from the inner guide sleeve passes through the outer guide sleeve and enters the flue gas treatment device equipped with the coal loading and dust removal vehicle on the furnace top, and is discharged after purification.

[0014] 3) At the end of coal loading, when the coke oven machine side furnace head uses the coal leveling mechanism to perform coal leveling operation, the flue gas collection hood is installed at the coal leveling port. The flue gas escaping from the coal leveling port is collected by the flue gas collection hood and then enters the flue gas purification device through the flue gas collection pipe and is discharged after purification.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1) For top-charging coke ovens, the coal-charging dust removal method adopted includes installing a high-pressure ammonia injection device at the bridge pipe to achieve negative pressure smoke extraction, installing a top-charging dust removal vehicle and a matching flue gas treatment device at the furnace top, using a sealed coal-charging flue gas outlet device that is sealedly connected to the furnace top coal-charging port, and installing a flue gas collection and treatment device at the furnace head flat coal port. This combination of technical means effectively solves the problem of smoke and dust escaping during coal charging in top-charging coke ovens, providing strong support for promoting the development of the top-charging coking industry.

[0017] 2) The present invention is applicable to all top-loading coke ovens and has the advantages of flexible operation, reasonable structural arrangement, investment saving, energy saving and consumption reduction, and significant environmental protection effect, which effectively guarantees the smooth progress of coke oven production.

[0018] 3) Different technical measures are adopted to deal with the smoke and dust escaping from the coal loading hole, the smoke and dust escaping from the carbonization chamber during the coal loading process, and the smoke and dust escaping during the coal leveling process, so as to facilitate subsequent maintenance and renovation;

[0019] 4) It has a broad application prospect. It is not only suitable for newly built top-charging coke ovens, but also can be easily used for equipment modification of large top-charging coke ovens that have been put into operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a top-loading coke oven coal-charging flue gas treatment system according to the present invention. Figure 1 .

[0021] Figure 2 This is a schematic diagram of a top-loading coke oven coal-charging flue gas treatment system according to the present invention. Figure 2 .

[0022] In the figure: 1-coal loading and dust removal vehicle on the furnace top; 2-coal loading inner guide sleeve; 3-inner guide sleeve sealing structure; 4-smoke guide outer guide sleeve; 5-outer guide sleeve sealing structure; 6-coal charge; 7-carbonization chamber flue gas; 8-rising pipe; 9-gas collecting pipe; 10-flue gas escaping from the inner guide sleeve; 11-flue gas treatment device (matched with the coal loading and dust removal vehicle on the furnace top); 12-flue gas escaping from the coal leveling port; 13-collecting and treatment device for flue gas escaping from the coal leveling port; 14-coal leveling mechanism; 15-high-pressure ammonia injection device; 16-carbonization chamber. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0024] like Figure 1 、 Figure 2As shown, the coal charging flue gas treatment system of the top-charging coke oven comprises a negative pressure smoke suction device, a coke oven top coal charging and dust removal vehicle 1 and a matched flue gas treatment device 11, a sealing coal charging and flue gas leading-out device, and a flat coal gate outside escaping flue gas collecting and treatment device 13; the negative pressure smoke suction device comprises a high-pressure ammonia water injection device 15 arranged on the side bridge pipe of the coke oven machine, the bridge pipe is connected between the rising pipe 8 and the gas collecting pipe 9 of the coke oven, and the gas collecting pipe 9 is additionally connected to a chemical production and recovery system; the coke oven top coal charging and dust removal vehicle 1 and the matched flue gas treatment device 11 are arranged on the top of the coke oven, the sealing coal charging and flue gas leading-out device is arranged on the coke oven top coal charging and dust removal vehicle 1, and the sealing coal charging and flue gas leading-out device comprises a coal charging inner leading sleeve 2 and a smoke leading outer sleeve 4, the smoke leading outer sleeve 4 is arranged outside the coal charging inner leading sleeve 2, the coal charging inner leading sleeve 2 is sealingly connected to the corresponding coke oven top coal charging gate during coal charging, and the smoke leading outer sleeve 4 is sealingly connected to the top of the coke oven; the flat coal gate outside escaping flue gas collecting and treatment device 13 is arranged at the flat coal gate of the coke oven head.

[0025] The sealing coal charging and flue gas leading-out device is composed of the coal charging inner leading sleeve 2, an inner leading sleeve sealing structure 3, the smoke leading outer sleeve 4 and an outer sleeve sealing structure 5; the inner leading sleeve sealing structure 3 is arranged outside the bottom of the coal charging inner leading sleeve 2; and the outer sleeve sealing structure 5 is arranged outside the bottom of the smoke leading outer sleeve 4.

[0026] The coal charging inner leading sleeve 2 and the smoke leading outer sleeve 4 are both telescopic structures.

[0027] The flat coal gate outside escaping flue gas collecting and treatment device 13 is composed of a flue gas collecting cover, a flue gas collecting pipe and a flue gas purification device; the flue gas collecting cover is arranged outside the flat coal gate of the coke oven head during flat coal charging, and the flue gas collecting cover is connected to the flue gas purification device through the flue gas collecting pipe.

[0028] The flue gas collecting pipe is a telescopic flexible pipe.

[0029] The coal charging flue gas treatment method of the top-charging coke oven comprises the following processes:

[0030] 1) when the top-charging coke oven is operated, the coke oven top coal charging and dust removal vehicle 1 is moved to above the corresponding carbonization chamber 16, and is connected to the coal charging gate of the corresponding carbonization chamber 16 through the sealing coal charging and flue gas leading-out device; the coal material 6 carried on the coke oven top coal charging and dust removal vehicle 1 enters the corresponding carbonization chamber 16 through the coal charging inner leading sleeve 2; the high-pressure ammonia water injection device 15 is started during coal charging, negative pressure is generated by injecting high-pressure ammonia water, the carbonization chamber flue gas 7 during the coal charging process is introduced into the gas collecting pipe 9 through the rising pipe 8, and is sent to the chemical production and recovery system for subsequent treatment;

[0031] 2) most of the flue gas generated during the coal charging process enters the gas collecting pipe 9, and a small part of the flue gas escapes from the inner leading sleeve sealing device 3 to the smoke leading outer sleeve 4, the inner leading sleeve escaping flue gas 10 enters the flue gas treatment device 11 matched with the coke oven top coal charging and dust removal vehicle 1 through the smoke leading outer sleeve 4, and is discharged after purification treatment;

[0032] 3) At the end of coal loading, when the coal leveling mechanism 14 is used to perform coal leveling operation on the furnace head of the coke oven machine, a flue gas collection hood is installed at the coal leveling port. The flue gas 12 escaping from the coal leveling port is collected by the flue gas collection hood and then enters the flue gas purification device through the flue gas collection pipe and is discharged after purification.

[0033] The present invention discloses a top-loading coke oven coal-charging flue gas treatment system, which comprises a negative pressure smoke extraction device arranged in the coke oven top machine-side bridge pipe, a top-loading coal-charging dust removal vehicle 1, a flue gas treatment device 11 associated with the top-loading coal-charging dust removal vehicle 1, a sealed coal-charging and smoke-guiding device provided on the top-loading coal-charging dust removal vehicle 1, and a flue gas collection and treatment device 13 provided at the coal outlet at the furnace head. Among them:

[0034] The negative pressure smoking device utilizes the negative pressure generated when the high-pressure ammonia injection device 15 injects ammonia to guide the flue gas in the carbonization chamber 16 during the coal loading process into the gas collecting pipe 9 through the riser 8, and then sends it to the chemical product recovery system for subsequent treatment.

[0035] The furnace top coal loading and dust removal vehicle 1 and the associated flue gas treatment device 11 are arranged on the coke oven top and are used to load coal into the carbonization chamber 16 and collect and treat the flue gas escaping from the coal loading port.

[0036] The sealed coal loading and flue gas outlet device is installed on the furnace top coal loading and dust removal vehicle 1 and includes a coal loading inner guide sleeve 2, an inner guide sleeve sealing structure 3, a smoke guide outer guide sleeve 4, and an outer guide sleeve sealing structure 5. The coal loading inner guide sleeve 2 is a coal lowering channel, and the inner guide sleeve sealing structure 3 is used to seal the coal lowering channel and the furnace top coal loading port during coal loading. This effectively prevents the escape of coal dust during the coal lowering process, ensuring that the coal 6 in the upper coal bunker of the furnace top coal loading and dust removal vehicle 1 can smoothly enter the carbonization chamber 16. The smoke guide outer guide sleeve 4 is used to guide the small amount of flue gas escaping from the coal loading inner guide sleeve 2 into the flue gas treatment device 11 equipped with the furnace top coal loading and dust removal vehicle 1. The outer guide sleeve sealing device 5 effectively prevents the escape of flue gas from the smoke guide outer guide sleeve 4. This double sealing ensures that no flue gas escapes during coal loading at the furnace top coal loading port.

[0037] The smoke gas collection and treatment device 13 is used to collect and purify the smoke that escapes from the coal opening at the furnace head when the coal is leveled at the end of coal loading.

[0038] When the furnace top coal loading and dust removal vehicle 1 is loading coal, a large amount of flue gas 7 is generated in the process of the coal material 6 entering the carbonization chamber 16. The negative pressure generated by the high-pressure ammonia injection device 15 spraying high-pressure ammonia is used to introduce the carbonization chamber flue gas 7 into the gas collecting pipe 9 through the riser 8 and send it to the chemical product recovery system. Due to the large amount of flue gas, the flue gas generated by the corresponding carbonization chamber 16 cannot all enter the gas collecting pipe 9 quickly. A small amount of flue gas will escape from the inner guide sleeve sealing structure 3 to the outside of the coal loading inner guide sleeve 2. After this part of the inner guide sleeve escaped flue gas 10 enters the outer guide sleeve 4, it can only enter the flue gas treatment device 11 of the furnace top coal loading and dust removal vehicle 1 under the action of the outer guide sleeve sealing structure 5. When the coal leveling mechanism 14 is used to perform the coal leveling operation on the machine side at the end of coal loading, the flue gas 12 escaping from the coal leveling port is collected by the coal leveling port escaped flue gas collection and treatment device 13 and discharged after purification.

[0039] The top-loading coke oven coal-charging flue gas treatment system described in the present invention is applicable to all top-loading coke ovens. It carries out multi-dimensional and comprehensive multi-treatment in areas where smoke and dust may escape during the coal-charging process. The equipment combination has a reasonable layout, flexible and simple operation, convenient maintenance, and saves investment. It achieves the environmental protection effect of zero flue gas emissions when the top-loading coke oven is charged with coal, which is conducive to the healthy and sustainable development of the industry.

[0040] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A top-loading coke oven coal-charging flue gas treatment system, characterized in that: It includes a negative pressure smoking device, a furnace top coal loading and dust removal vehicle and a matching flue gas treatment device, a sealed coal loading and flue gas outlet device, and a smoke collection and treatment device for escaping from the flat coal outlet; the negative pressure smoking device includes a high-pressure ammonia injection device arranged on the bridge pipe on the side of the coke oven machine, the bridge pipe is connected between the riser and the gas collecting pipe of the coke oven, and the gas collecting pipe is also connected to the chemical product recovery system; the furnace top coal loading and dust removal vehicle and the matching flue gas treatment device are arranged on the coke oven top, the sealed coal loading and smoke outlet device is arranged on the furnace top coal loading and dust removal vehicle, the sealed coal loading and smoke outlet device includes a coal loading inner guide sleeve and a smoke guide outer guide sleeve, the smoke guide outer guide sleeve is arranged on the periphery of the coal loading inner guide sleeve, the coal loading inner guide sleeve is sealed and connected to the corresponding furnace top coal loading port during coal loading, and the smoke guide outer guide sleeve is sealed and connected to the furnace top; the smoke collection and treatment device for escaping from the flat coal outlet is arranged at the flat coal outlet of the furnace head.

2. A top-loading coke oven coal-charging flue gas treatment system according to claim 1, characterized in that: The sealed coal loading and flue gas outlet device consists of a coal loading inner guide sleeve, an inner guide sleeve sealing structure, a smoke guiding outer guide sleeve and an outer guide sleeve sealing structure; the inner guide sleeve sealing structure is arranged on the bottom periphery of the coal loading inner guide sleeve; the outer guide sleeve sealing structure is arranged on the bottom periphery of the smoke guiding outer guide sleeve.

3. A top-loading coke oven coal-charging flue gas treatment system according to claim 2, characterized in that: The inner coal-loading guide sleeve and the outer smoke-guiding guide sleeve are both telescopic structures.

4. A top-loading coke oven coal-charging flue gas treatment system according to claim 1, characterized in that: The device for collecting and treating the flue gas escaping from the coal outlet is composed of a flue gas collection hood, a flue gas collection pipe and a flue gas purification device. When coal is flat, the flue gas collection hood is placed outside the coal outlet of the burner head, and the flue gas collection hood is connected to the flue gas purification device through the flue gas collection pipe.

5. A top-loading coke oven coal-charging flue gas treatment system according to claim 4, characterized in that: The smoke collection pipe is a telescopic hose.

6. A method for treating flue gas from top-charged coke ovens, which is implemented based on the top-charged coke ovens flue gas treatment system according to any one of claims 1 to 5; characterized in that: The process includes the following: 1) When the top-loading coke oven is being charged with coal, the top-loading coal-dust removal vehicle moves to the top of the corresponding carbonization chamber and docks with the coal loading port of the corresponding carbonization chamber through the sealed coal loading and flue gas outlet device. The coal carried by the top-loading coal-dust removal vehicle enters the corresponding carbonization chamber through the coal loading inner guide sleeve. During coal loading, the high-pressure ammonia injection device is activated to generate negative pressure by injecting high-pressure ammonia. During the coal loading process, the flue gas in the carbonization chamber is introduced into the gas collecting pipe through the riser and sent to the chemical product recovery system for subsequent treatment. 2) Most of the flue gas generated during coal loading enters the gas collecting pipe, while a small part of the flue gas escapes from the inner guide sleeve sealing device into the outer guide sleeve. The flue gas escaping from the inner guide sleeve passes through the outer guide sleeve and enters the flue gas treatment device equipped with the coal loading and dust removal vehicle on the furnace top, and is discharged after purification. 3) At the end of coal loading, when the coke oven machine side furnace head uses the coal leveling mechanism to perform coal leveling operation, the flue gas collection hood is installed at the coal leveling port. The flue gas escaping from the coal leveling port is collected by the flue gas collection hood and then enters the flue gas purification device through the flue gas collection pipe and is discharged after purification.

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