Device for reducing dry quenching burn-out rate
By injecting nitrogen into the circulating gas of the dry quenching furnace to dilute oxygen, the problem of traditional air introduction method causing coke burning at extreme temperatures is solved, and the effect of reducing the dry quenching burning loss rate and improving the coke quality is achieved.
Patent Information
- Application Number
- CN202421586755.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-05
AI Technical Summary
In the dry coke quenching technology, the traditional air introduction method can easily cause additional burning of coke under extreme temperature conditions and cannot effectively reduce the CO and H2 content.
By injecting nitrogen into the circulating gas of the dry quenching furnace, the oxygen content is diluted, thereby reducing the CO and H2 generated by coke combustion, reducing the flammability of coke, thereby reducing the dry quenching loss rate.
It effectively reduces the dry quenching loss rate, improves the quality of coke, and avoids the defects of the air introduction method at extreme temperatures.
Smart Images
Figure CN222781564U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coking, in particular to a device for reducing the dry quenching coke burning rate. Background Art
[0002] The coking industry is an important basic energy and raw material industry, and plays an important role in my country's economic construction, social development, fiscal and taxation, and stable employment. Traditional coke production uses wet quenching technology, which not only consumes a lot of energy, but also emits a large amount of particulate matter and air pollutants represented by SO2, H2S, etc., as well as difficult-to-treat solid wastes such as phenol-cyanide water and tar residue. The high-energy consumption and high-emission production process has caused resource waste and environmental pollution, hindering the rapid development of the coking industry.
[0003] Compared with traditional production processes, dry coke quenching technology can properly reduce the diffusion pollution generated during the quenching process. Its fan injects low-temperature inert gas into the dry quenching furnace, and cooperates with the dry quenching furnace to exchange heat with the red coke, so that the red coke can be cooled quickly. The inert gas that absorbs the heat of the red coke enters the dry quenching boiler through the flue for heat exchange. The boiler generates steam for power generation or grid connection. The cooled inert gas is re-blown into the dry quenching furnace by the circulating fan. The inert gas is circulated in a closed system, which can effectively control the dust content in the surrounding air. It has the advantages of energy saving and environmental protection, and can also improve the production quality of coke.
[0004] At present, coking plants reduce the content of combustible gases such as CO and H2 by introducing air into the CDQ system. This method is effective when the T6 temperature is between 650-980℃, because this temperature range can ensure the complete combustion of CO and H2. When the T6 temperature is lower than 650℃, the temperature is not high enough for complete combustion of CO and H2, so these gases cannot be fully consumed. When the T6 temperature is higher than 980℃, it may cause equipment overheating and increase the risk of coke burning. Therefore, under these extreme temperature conditions, the air combustion method is not effective and is prone to cause additional coke burning. Utility Model Content
[0005] The utility model aims to provide a device for reducing the dry quenching coke loss rate, which can avoid the problem of increasing coke loss when re-burning combustible gas by air introduction method.
[0006] The utility model provides a device for reducing the dry quenching coke loss rate, comprising: a dry quenching furnace, and also comprising a primary dust collector connected to one side of the dry quenching furnace through a pipeline, the primary dust collector is connected to a dry quenching coke boiler through a pipeline, the dry quenching coke boiler is connected to a secondary dust collector through a pipeline, the secondary dust collector is connected to a circulating fan through a pipeline, the output end of the circulating fan is connected to a secondary economizer through a pipeline, and the secondary economizer is connected to the bottom of the dry quenching furnace through a pipeline;
[0007] A processing component for processing circulating gas is arranged on the pipeline between the secondary dust collector and the secondary economizer.
[0008] In a specific embodiment, the processing component includes a first gas injection pipe connected to the input end pipeline of the circulating fan and a second gas injection pipe connected to the output end pipeline of the circulating fan, and one end of the first gas injection pipe and the second gas injection pipe are both connected to the nitrogen supply equipment.
[0009] In a specific embodiment, a gas one-way valve is installed on both the first gas injection pipe and the second gas injection pipe.
[0010] In a specific embodiment, flow control valves are installed on both the first gas injection pipe and the second gas injection pipe to adjust the nitrogen injection amount in real time.
[0011] In a specific embodiment, the processing component further includes a filter box connected to the pipeline at the output end of the circulation fan, and a filter plate is arranged inside the filter box.
[0012] In a specific embodiment, the filter plate is a honeycomb molecular sieve.
[0013] In a specific embodiment, a baffle is disposed on one side of the filter box, and a sealing block is disposed on one side of the baffle.
[0014] In a specific embodiment, the baffle is connected to the filter box by bolts.
[0015] In a specific embodiment, the sealing block is a component made of rubber material.
[0016] In a specific embodiment, both the top and bottom surfaces inside the filter box are provided with limit plates, and the spacing between the limit plates is adapted to the filter plate sections.
[0017] The beneficial effects of the present application are as follows: nitrogen is injected into the circulating gas of the dry quenching furnace through the first gas injection pipe and the second gas injection pipe, and the oxygen content contained in the circulating gas is diluted by the nitrogen, thereby reducing CO and H2 produced by the combustion of coke, thereby reducing the oxygen concentration inside the dry quenching furnace, thereby reducing the flammability of the coke, thereby reducing the dry quenching coke burnout rate, and can effectively ensure the quality of the coke. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;
[0020] Figure 2 This is a schematic diagram of the structure of the processing component of the first embodiment of the utility model;
[0021] Figure 3 This is a schematic diagram of the overall structure of the second embodiment of the present utility model;
[0022] Figure 4 This is a schematic diagram of the filter box structure of the second embodiment of the utility model;
[0023] Figure 5 This is a three-dimensional schematic diagram of the baffle structure of the second embodiment of the utility model;
[0024] Figure 6 This is a three-dimensional schematic diagram of the limiting plate structure of the second embodiment of the utility model;
[0025] Figure 7 for Figure 6 main view.
[0026] Icons: 1- CDQ furnace; 2- primary dust collector; 3- CDQ boiler; 4- secondary dust collector; 5- circulating fan; 6- auxiliary economizer; 7- treatment assembly; 71- first gas injection pipe; 72- second gas injection pipe; 73- gas one-way valve; 74- flow control valve; 75- filter box; 751- filter plate; 752- baffle; 753- sealing block; 754- limit plate. DETAILED DESCRIPTION
[0027] When the air combustion method is used to reduce the combustible gas components such as CO and H2, the air combustion method has certain disadvantages and is prone to cause additional coke burning. Therefore, the inventor has provided a device for reducing the dry quenching coke burning rate after research. Nitrogen is injected into the circulating gas through the first gas injection pipe and the second gas injection pipe. The nitrogen dilutes the oxygen content contained in the circulating gas and reduces the flammability of the coke, thereby solving the above-mentioned defects.
[0028] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0029] Embodiment 1:
[0030] Please refer to Figure 1 to Figure 2 The embodiment of the utility model provides a device for reducing the dry quenching coke burning rate, comprising a dry quenching furnace 1, a primary dust collector 2, a dry quenching coke boiler 3, a secondary dust collector 4, a circulating fan 5, and an auxiliary economizer 6. The dry quenching furnace 1 is connected to the primary dust collector 2 and the dry quenching coke boiler 3 through a pipeline, the dry quenching coke boiler 3 is connected to the secondary dust collector 4 through a pipeline, the secondary dust collector 4 is connected to the input end of the circulating fan 5 through a pipeline, the output end of the circulating fan 5 is connected to the auxiliary economizer 6 through a pipeline, and the auxiliary economizer 6 is connected to the dry quenching furnace 1 through a pipeline;
[0031] A processing assembly 7 for processing the circulating gas is provided on the pipeline between the secondary dust collector 4 and the secondary economizer 6 .
[0032] Please refer to Figure 1 to Figure 2 The processing component 7 includes a first gas injection pipe 71 connected to the pipeline at the input end of the circulation fan 5 and a second gas injection pipe 72 connected to the pipeline at the output end of the circulation fan 5. One end of the first gas injection pipe 71 and the second gas injection pipe 72 are connected to the nitrogen supply equipment. A gas one-way valve 73 is installed on the first gas injection pipe 71 and the second gas injection pipe 72. A flow control valve 74 for real-time adjustment of the nitrogen injection amount is installed on the first gas injection pipe 71 and the second gas injection pipe 72.
[0033] In this embodiment, coke enters the dry quenching furnace 1 from the top through the elevator and the loading device, and the circulating gas enters from the bottom of the dry quenching furnace 1. The circulating gas countercurrently contacts the coke to achieve heat exchange, so that the coke can be cooled. Then, the circulating gas in the dry quenching furnace 1 passes through the primary dust collector 2 to remove large coke particles, and then enters the dry quenching boiler 3 for heat exchange. The circulating gas after heat exchange in the dry quenching boiler 3 passes through the secondary dust collector 4, and the secondary dust collector 4 further removes fine coke particles. Then, after being pressurized by the circulating fan 5, the circulating gas enters the secondary economizer 6 for cooling again. After cooling, it enters the bottom of the dry quenching furnace 1 through the pipeline, and in the dry quenching furnace 1, the circulating gas passes through the secondary dust collector 4, and the circulating gas passes through the secondary economizer 6 for cooling again. Heat exchange is performed again inside the furnace 1. After the circulating gas passes through the secondary dust collector 4 to remove the coke powder, nitrogen is injected into the circulating gas through the first gas injection pipe 71 and the second gas injection pipe 72. The nitrogen dilutes the oxygen content contained in the circulating gas, thereby reducing the CO and H2 produced by the combustion of coke, so as to reduce the oxygen concentration in the dry quenching furnace 1, thereby reducing the flammability of the coke, thereby reducing the dry quenching coke loss rate and further ensuring the quality of the coke. The gas one-way valve 73 can prevent the circulating gas from flowing back into the first gas injection pipe 71 and the second gas injection pipe 72, and the flow control valve 74 can control the nitrogen injection amount in real time.
[0034] Embodiment 2:
[0035] Please refer to Figures 3 to 7 Different from the first embodiment, the processing component 7 may also include a filter box 75 connected to the output pipeline of the circulating fan 5, and a filter plate 751 is arranged inside the filter box 75. The filter plate 751 is a honeycomb molecular sieve for adsorbing CO2 in the circulating gas.
[0036] In this embodiment: after the circulating gas is pressurized by the circulating fan 5, the circulating gas enters the filter box 75. When the circulating gas passes through the honeycomb molecular sieve, the honeycomb molecular sieve adsorbs CO2 in the circulating gas and removes CO2 generated by the combustion of the introduced air. By reducing the CO2 content in the circulating gas, the generation of CO in the furnace can be reduced, thereby ensuring that the CO2 content in the circulating gas can be controlled during operation, thereby reducing the burning loss of coke.
[0037] Please refer to Figures 4 to 7 A baffle 752 is provided on one side of the filter box 75, and the baffle 752 is connected to the filter box 75 by bolts. A sealing block 753 is provided on one side of the baffle 752, and the sealing block 753 is a component made of rubber material. Limiting plates 754 are provided on the top and bottom surfaces inside the filter box 75, and the limiting plates 754 are used to limit the filter plate 751.
[0038] In this embodiment: When the filter plate 751 needs to be replaced after being used for a long time, the baffle 752 is separated from the filter box 75 by tightening the bolts, and the filter plate 751 is pulled out from the inside of the limiting plates 754. Then, the new filter plate 751 is reinserted between the limiting plates 754, and the baffle 752 is fixed to the filter box 75 again by bolts.
[0039] In summary, the working principle of the device for reducing the dry quenching coke loss rate of the embodiment of the utility model is as follows: the coke enters the dry quenching furnace 1 from the top of the dry quenching furnace 1 through the elevator and the loading device, the circulating gas enters from the bottom of the dry quenching furnace 1, and the circulating gas countercurrently contacts the coke to achieve heat exchange, so that the coke can be cooled, and then the circulating gas in the dry quenching furnace 1 passes through the primary dust collector 2 to remove large particles of coke powder, and then enters the dry quenching boiler 3 for heat exchange, and the circulating gas after heat exchange in the dry quenching boiler 3 passes through the secondary dust collector 4, and the secondary dust collector 4 further removes fine particles of coke powder, and then passes through the circulating gas. After the pressure is increased by the circulating fan 5, the circulating gas enters the sub-economizer 6 for cooling again. After cooling, it enters the bottom of the CDQ furnace 1 through the pipeline and performs heat exchange again inside the CDQ furnace 1. After the circulating gas passes through the secondary dust collector 4 to remove the coke powder, nitrogen is injected into the circulating gas through the first gas injection pipe 71 and the second gas injection pipe 72. The nitrogen dilutes the oxygen content contained in the circulating gas, thereby reducing the CO and H2 produced by the combustion of coke, so as to reduce the oxygen concentration in the CDQ furnace 1, thereby reducing the flammability of the coke, thereby reducing the CDQ coke burnout rate and further ensuring the quality of the coke.
[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A device for reducing the dry quenching coke loss rate, comprising a dry quenching furnace (1), characterized in that: It also comprises a primary dust collector (2) connected to one side of the dry quenching furnace (1) through a pipeline, the primary dust collector (2) is connected to a dry quenching boiler (3) through a pipeline, the dry quenching boiler (3) is connected to a secondary dust collector (4) through a pipeline, the secondary dust collector (4) is connected to a circulating fan (5) through a pipeline, the output end of the circulating fan (5) is connected to a secondary economizer (6) through a pipeline, and the secondary economizer (6) is connected to the bottom of the dry quenching furnace (1) through a pipeline; A processing component (7) for processing circulating gas is arranged on the pipeline between the secondary dust collector (4) and the secondary economizer (6).
2. The device for reducing the dry quenching coke loss rate according to claim 1, characterized in that: The processing assembly (7) comprises a first gas injection pipe (71) connected to the input end pipeline of the circulation fan (5) and a second gas injection pipe (72) connected to the output end pipeline of the circulation fan (5), and one end of each of the first gas injection pipe (71) and the second gas injection pipe (72) is connected to a nitrogen gas supply device.
3. The device for reducing the dry quenching coke loss rate according to claim 2, characterized in that: A gas one-way valve (73) is installed on both the first gas injection pipe (71) and the second gas injection pipe (72).
4. The device for reducing the dry quenching coke loss rate according to claim 3 is characterized in that: The first gas injection pipe (71) and the second gas injection pipe (72) are both installed with flow control valves (74) for adjusting the nitrogen injection amount in real time.
5. The device for reducing the dry quenching coke loss rate according to claim 1, characterized in that: The processing assembly (7) further comprises a filter box (75) connected to the pipeline at the output end of the circulation fan (5), and a filter plate (751) is arranged inside the filter box (75).
6. The device for reducing the dry quenching coke loss rate according to claim 5, characterized in that: The filter plate (751) is a honeycomb molecular sieve.
7. The device for reducing the dry quenching coke loss rate according to claim 6, characterized in that: A baffle (752) is provided on one side of the filter box (75), and a sealing block (753) is provided on one side of the baffle (752).
8. The device for reducing the dry quenching coke loss rate according to claim 7, characterized in that: The baffle (752) is connected to the filter box (75) via bolts.
9. The device for reducing the dry quenching coke loss rate according to claim 8, characterized in that: The sealing block (753) is a component made of rubber material.
10. The device for reducing the dry quenching coke loss rate according to claim 9, characterized in that: Limiting plates (754) are provided on the top and bottom surfaces inside the filter box (75), and the spacing between the limiting plates (754) is adapted to the filter plate (751).