A device for purifying coke oven flue dust and tar

Abstract

The present disclosure relates to the technical field of coke oven flue gas treatment, and one embodiment of the present disclosure provides a coke oven flue gas dust and tar purification treatment device, which comprises a shell, a desulfurization device and a desulfurization device, the desulfurization device and the desulfurization device are communicated with the shell, an oil removal assembly is arranged at the top of the shell, a bottom cover is arranged at the bottom of the shell, a dust removal assembly is arranged between the bottom cover and the shell, a connecting assembly is arranged between the bottom cover and the desulfurization device, the oil removal assembly comprises an inner cover, the inner cover is fixed in the shell, a flue gas communication pipeline is arranged on the outer side of the shell, the flue gas communication pipeline is communicated with the inner cover, a plurality of cooling pipelines are transversely connected between the inner cover and the shell, and circulating pipelines are connected to both ends of the cooling pipelines. Through the above technical scheme, the technical problem that the internal structure design does not fully consider the tackiness and adhesion characteristics of tar in the prior art, resulting in extremely inconvenient cleaning and maintenance, is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of coke oven flue gas treatment, specifically to a purification and treatment device for coke oven flue gas dust and tar. Background Technology

[0002] In the coking industry, the flue gas emitted from coke ovens contains a large amount of dust and tar. If it is emitted directly without effective purification, it will not only cause serious air pollution, but also cause equipment blockage due to tar adhesion, affecting the continuity of production. Currently used purification devices in the industry have significant drawbacks in tar removal.

[0003] Existing equipment often employs single or combined processes such as electrostatic precipitators and spray towers. However, their internal structural designs do not fully consider the viscosity and adhesion characteristics of tar, leading to extremely inconvenient cleaning and maintenance. For example, tar deposits easily form on the electrode plates and honeycomb walls of electrostatic precipitators, requiring machine shutdown and disassembly for cleaning. This is not only time-consuming and labor-intensive but also affects the equipment's sealing performance due to frequent disassembly and reassembly. The tar mixture adhering to the packing layer and inner wall of the spray tower is viscous and difficult to remove completely using traditional high-pressure water jets. Long-term accumulation leads to a reduction in the flow cross-section and a significant decrease in purification efficiency.

[0004] Furthermore, dust and tar easily form compound pollutants within the equipment, requiring separate treatment using traditional cleaning methods, which are complex and prone to secondary pollution. This inconvenient cleaning process not only increases labor and time costs but also reduces the operating efficiency of the coke oven due to frequent shutdowns, failing to meet the requirements of coordinated development of environmental protection and production. Therefore, there is an urgent need for a specialized treatment device that can efficiently purify dust and tar while being easy to clean and maintain, in order to solve the aforementioned industry pain points. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a purification and treatment device for coke oven flue gas dust and tar, which solves the technical problem that the internal structure design of the prior art does not fully consider the viscosity and adhesion characteristics of tar, resulting in extremely inconvenient cleaning and maintenance.

[0006] According to one aspect, at least one embodiment of this disclosure provides a purification and treatment apparatus for coke oven flue gas dust and tar, comprising: The enclosure, desulfurization equipment, and denitrification equipment are connected to the enclosure. An oil removal assembly is disposed at the top inside the housing; A bottom cover and a dust removal assembly, wherein the bottom cover is disposed at the bottom of the outer casing, and the dust removal assembly is disposed between the bottom cover and the outer casing; A connecting assembly is disposed between the bottom cover and the desulfurization equipment; The oil removal assembly includes an inner cover, which is fixed inside the outer shell. A flue gas connecting pipe is provided on the outside of the outer shell, and the flue gas connecting pipe is connected to the inner cover. Several cooling pipes are transversely connected between the inner cover and the outer shell, and circulation pipes are connected to both ends of the cooling pipes.

[0007] As a further technical solution, the inner cover has several ventilation holes around its circumference, the outer cover has a discharge cover on its side surface, the discharge cover is connected to the inner cover, and the bottom of the discharge cover has a connecting pipe.

[0008] As a further technical solution, a rotating shaft is laterally rotatably connected inside the outer shell. The rotating shaft is driven by electricity to rotate. A scraper is fixedly connected to the rotating shaft, and the end face of the scraper slides and fits against the surface of the inner cover around the circumference.

[0009] As a further technical solution, the dust removal component includes an inner partition, which is fixed inside the outer shell. A pair of telescopic cylinders are vertically mounted on the outer surface of the outer shell, and the output end of the telescopic cylinders is connected to a bottom shell.

[0010] As a further technical solution, the inner partition layer has several openings on its surface, a bracket is provided around the top of the bottom shell, a filter bag is installed on the bracket, the filter bag is located in the bottom shell, and the bottom cover is connected to the bottom of the bottom shell.

[0011] As a further technical solution, the connecting assembly includes a docking cover, which is fixedly connected to the bottom of the base cover by bolts, and the desulfurization equipment is provided with a main pipe at the air inlet end.

[0012] As a further technical solution, a telescopic pipe is connected between one end of the main pipe and the docking cover, and a pair of docking cylinders are horizontally connected on the main pipe, with the output end of the docking cylinders connected to the docking cover.

[0013] As a further technical solution, the inner cover has an overall cylindrical structure.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the oil removal assembly solves the problem of difficult tar removal through a collaborative oil removal design. Cooling pipes circulate and lower the temperature, promoting efficient tar condensation. A scraper, in close contact with the inner shroud, rotates to thoroughly remove the tar, preventing blockage of the vents. The cylindrical inner shroud ensures uniform flue gas flow and consistent tar distribution. This structure allows for tar removal without frequent disassembly, reducing downtime, improving oil removal efficiency, preventing equipment blockage caused by tar viscosity, and ensuring continuous flue gas treatment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; In the diagram: 1. Outer shell; 2. Desulfurization equipment; 3. Denitrification equipment; 4. Bottom cover; 5. Oil removal assembly; 5-1. Inner cover; 5-2. Flue gas connecting pipe; 5-3. Cooling pipe; 5-4. Circulation pipe; 5-5. Vent; 5-6. Discharge hood; 5-7. Connecting pipe; 5-8. Rotating shaft; 5-9. Scraper; 6. Dust removal assembly; 6-1. Inner partition; 6-2. Telescopic cylinder; 6-3. Bottom shell; 6-4. Port; 6-5. Bracket; 6-6. Filter bag; 7. Connecting assembly; 7-1. Docking cover; 7-2. Main pipe; 7-3. Telescopic pipe; 7-4. Docking cylinder. Detailed Implementation

[0017] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0018] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0020] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-3 As shown, it illustrates a purification and treatment device for coke oven flue gas dust and tar according to an embodiment of the present disclosure, comprising: The enclosure 1, the desulfurization equipment 2, and the denitrification equipment 3 are connected to the enclosure 1; Oil removal component 5, wherein the oil removal component 5 is disposed at the top inside the housing 1; The bottom cover 4 and the dust removal component 6 are provided. The bottom cover 4 is disposed at the bottom of the outer shell 1, and the dust removal component 6 is disposed between the bottom cover 4 and the outer shell 1. Connection component 7, which is disposed between the bottom cover 4 and the desulfurization equipment 2; The oil removal assembly 5 includes an inner cover 5-1, which is fixed inside the outer shell 1. A flue gas connecting pipe 5-2 is provided on the outer side of the outer shell 1, and the flue gas connecting pipe 5-2 is connected to the inner cover 5-1. Several cooling pipes 5-3 are transversely connected between the inner cover 5-1 and the outer shell 1. Circulation pipes 5-4 are connected to both ends of the cooling pipes 5-3. Several ventilation holes 5-5 are opened around the surface of the inner cover 5-1. An exhaust hood 5-6 is provided on the side surface of the outer shell 1, and the exhaust hood 5-6 is connected to the inner cover 5-1. A connecting pipe 5-7 is provided at the bottom of the exhaust hood 5-6. A rotating shaft 5-8 is transversely rotatably connected inside the outer shell 1. The rotating shaft 5-8 is driven by electricity to rotate. A scraper 5-9 is fixedly connected to the rotating shaft 5-8, and the end face of the scraper 5-9 slides and fits against the surface of the inner cover 5-1 around the circumference.

[0024] In some examples, to achieve efficient separation and cleaning of tar in coke oven flue gas, an oil removal component 5 is designed. This component includes an inner cover 5-1 at the top of the outer shell 1, which is sealed to the inner wall of the outer shell 1 to form an independent chamber. A flue gas connecting pipe 5-2 on the outside of the outer shell 1 is connected to the coke oven flue gas at one end and to the inner cover 5-1 at the other end, guiding the flue gas into the inner cover 5-1. Several cooling pipes 5-3 run horizontally between the inner cover 5-1 and the outer shell 1, and circulation pipes 5-4 at both ends are connected to an external refrigeration system, through which coolant can be introduced to reduce the temperature of the inner cover 5-1 through heat exchange. Ventilation holes 5-5 are evenly distributed around the surface of the inner cover 5-1, allowing purified gas in the flue gas to pass through. An exhaust hood 5-6 on the side surface of the outer shell 1 is connected to the inner cover 5-1 to exhaust the purified gas. A connecting pipe 5-7 at the bottom is used to discharge the scraped tar. A rotating shaft 5-8 inside the outer shell 1 is driven by a motor, and scrapers 5-9 on the shaft are radially distributed, with their end faces slidingly against the surface of the inner cover 5-1.

[0025] During operation, after the flue gas enters the inner shroud 5-1, the surface temperature of the inner shroud 5-1 decreases under the action of the cooling pipe 5-3, causing the tar to condense and adhere to the surface of the inner shroud 5-1. The rotating shaft 5-8 drives the scraper 5-9 to rotate, scraping the solidified tar off the surface of the inner shroud 5-1. The tar is then discharged through the connecting pipe 5-7. The purified gas enters the gap between the outer shell 1 and the inner shroud 5-1 through the vent 5-5, and is then filtered downwards from the bottom before being discharged. The circulating cooling of the cooling pipe 5-3 ensures that the inner shroud 5-1 maintains a low temperature, promoting efficient tar condensation. The sliding contact between the scraper 5-9 and the inner shroud 5-1 ensures thorough tar removal, preventing residue from clogging the vent 5-5. The distribution of the vent 5-5 ensures smooth gas flow without affecting purification efficiency. The continuous drive of the rotating shaft 5-8 allows the scraping operation to continue, adapting to the continuity of flue gas treatment. This component effectively separates and cleans tar by combining condensation and scraping, laying the foundation for subsequent purification processes.

[0026] like Figures 1-3 As shown in the figure, the dust removal component 6 in this embodiment includes an inner partition 6-1, which is fixed inside the outer shell 1. A pair of telescopic cylinders 6-2 are vertically mounted on the outer surface of the outer shell 1. The output end of the telescopic cylinders 6-2 is connected to the bottom shell 6-3. The surface of the inner partition 6-1 is provided with several openings 6-4. A bracket 6-5 is provided around the top of the bottom shell 6-3. A filter bag 6-6 is installed on the bracket 6-5. The filter bag 6-6 is located in the bottom shell 6-3. The bottom cover 4 is connected to the bottom of the bottom shell 6-3.

[0027] In some examples, a dust removal assembly 6 is designed to achieve efficient filtration of dust in coke oven flue gas. This assembly includes an inner partition 6-1 fixed horizontally inside a housing 1, dividing the interior of the housing 1 into upper and lower chambers. A pair of telescopic cylinders 6-2 on the outer surface of the housing 1 are installed vertically downwards, with their output ends rigidly connected to a bottom shell 6-3, allowing the bottom shell 6-3 to move up and down. Several openings 6-4 are evenly distributed on the surface of the inner partition 6-1, allowing flue gas from the upper chamber to enter the lower filter bag 6-6. A bracket 6-5 around the top of the bottom shell 6-3 supports the filter bag 6-6, and the opening of the filter bag 6-6 is sealed to the bracket 6-5, trapping dust inside the bag. Clean gas passes through the filter bag 6-6 and enters the bottom of the bottom shell 6-3. A bottom cover 4 at the bottom of the bottom shell 6-3 collects dust falling from the filter bag 6-6 and provides a channel for gas flow.

[0028] During operation, the oil-treated flue gas enters the filter bag 6-6 through the opening 6-4 of the inner partition 6-1. Dust is intercepted by the filter bag 6-6, and clean gas enters the bottom shell 6-3 and is discharged through the bottom cover 4. When the filter bag 6-6 accumulates a lot of dust, the telescopic cylinder 6-2 lowers the bottom shell 6-3, causing the filter bag 6-6 to detach from the inner partition 6-1 for easy removal for cleaning or replacement. After cleaning, the telescopic cylinder 6-2 pushes the bottom shell 6-3 upward, resetting the filter bag 6-6 and sealing it against the inner partition 6-1, restoring its filtration function. The high-precision filtration of the filter bag 6-6 ensures thorough dust removal and improves the quality of flue gas purification. The lifting structure of the bottom shell 6-3 driven by the telescopic cylinder 6-2 makes it easy to replace the filter bag 6-6, reducing maintenance downtime. The sealed connection between the bracket 6-5 and the filter bag 6-6 prevents leakage of unfiltered flue gas and ensures filtration efficiency. The dust collection function of the bottom cover 4 prevents secondary dust pollution and maintains the cleanliness of the equipment interior. This component combines efficient filtration with convenient maintenance to achieve reliable purification of coke oven flue gas dust.

[0029] like Figures 1-3As shown in the figure, the connecting component 7 in this embodiment includes a docking cover 7-1, which is fixedly connected to the bottom of the base cover 4 by bolts. The desulfurization equipment 2 is provided with a main pipe 7-2 at the air inlet end. One end of the main pipe 7-2 is connected to the docking cover 7-1 by a telescopic pipe 7-3. A pair of docking cylinders 7-4 are horizontally connected to the main pipe 7-2. The output end of the docking cylinders 7-4 is connected to the docking cover 7-1.

[0030] In some examples, to facilitate rapid docking and separation of the base shroud 4 and the desulfurization equipment 2, and to facilitate maintenance of the dust removal component 6, a connecting component 7 is designed. This component includes a docking shroud 7-1 at the bottom of the base shroud 4, which is fixed with bolts and has sealing gaskets at its edges. The main pipe 7-2 at the air inlet of the desulfurization equipment 2 is used to transport the purified flue gas. A telescopic pipe 7-3 between one end of the base shroud 4 and the docking shroud 7-1 has a corrugated structure to accommodate displacement changes during docking. A pair of docking cylinders 7-4 are symmetrically distributed horizontally mounted on the main pipe 7-2, with their output ends connected to the side of the docking shroud 7-1, which can push the docking shroud 7-1 closer to or away from the main pipe 7-2.

[0031] During operation, when docking is required, the docking cylinder 7-4 extends, pushing the docking cover 7-1 towards the main pipe 7-2. The telescopic pipe 7-3 extends accordingly until the docking cover 7-1 and the main pipe 7-2 are sealed together, establishing a flue gas connection. When separation is required, the docking cylinder 7-4 retracts, pulling the docking cover 7-1 away from the main pipe 7-2. The telescopic pipe 7-3 retracts, and the bottom cover 4 separates from the main pipe 7-2 along with the docking cover 7-1, creating space for the bottom shell 6-3 to descend and for the filter bag 6-6 to be replaced. The flexible design of the telescopic pipe 7-3 allows for angular and positional deviations during docking, ensuring a tight seal. The drive of the docking cylinder 7-4 enables automated docking and separation, reducing manual operation. The sealing gasket ensures airtightness at the docking point, preventing flue gas leakage and environmental pollution. The symmetrically distributed docking cylinders 7-4 balance the docking force, preventing the docking cover 7-1 from shifting and improving connection stability. This component combines flexible drive with reliable sealing to enable rapid switching between the bottom cover 4 and the desulfurization equipment 2, ensuring convenient maintenance of the dust removal component 6 and continuous flue gas purification.

[0032] For example, such as Figure 3 As shown, the inner cover 5-1 has an overall cylindrical structure.

[0033] In some examples, the inner shroud 5-1 has an overall cylindrical structure, forming an annular gap with the inner wall of the outer shell 1. This structure allows for more uniform flow of flue gas within the inner shroud, avoiding dead zones and enabling tar to condense more evenly on the surface of the inner shroud 5-1. Simultaneously, the cylindrical surface facilitates the contact and rotation of the scraper 5-9, ensuring that tar is thoroughly scraped from all areas, reducing residue. Furthermore, the annular gap allows for smooth flow of purified gas to the exhaust shroud 5-6, improving overall processing efficiency and enhancing the stability of the oil removal assembly 5.

[0034] In actual use: coke oven flue gas enters the inner cover 5-1 through the flue gas connecting pipe 5-2. Coolant is introduced into the cooling pipe 5-3 through the circulation pipe 5-4. The surface temperature of the inner cover 5-1 decreases, causing tar to condense. The rotating shaft 5-8 drives the scraper 5-9 to rotate, scraping off the tar from the surface of the inner cover 5-1 and discharging it through the connecting pipe 5-7. The purified gas enters the lower layer of the outer shell 1 through the vent 5-5. The gas passes through the inner partition 6-1 through the opening 6-4 and enters the filter bag 6-6. Dust is intercepted, and the clean gas enters the bottom shell 6-3 and is discharged through the bottom cover 4. When cleaning is required, the telescopic cylinder 6-2 drives the bottom shell 6-3 to descend, remove the filter bag 6-6, clean it, and then reset it. The docking cylinder 7-4 pushes the docking cover 7-1 to dock with the main pipe 7-2. The telescopic pipe 7-3 adapts to displacement changes. When separation and maintenance are required, the cylinder retracts, realizing rapid switching between the bottom cover 4 and the desulfurization equipment 2. The entire process is highly efficient in purification and easy to maintain.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A purification and treatment device for coke oven flue gas dust and tar, characterized in that, include: The enclosure (1), the desulfurization equipment (2), and the denitrification equipment (3) are connected to the enclosure (1); An oil removal assembly (5) is disposed at the top inside the housing (1); The bottom cover (4) and the dust removal assembly (6) are provided at the bottom of the outer shell (1) and the dust removal assembly (6) is provided between the bottom cover (4) and the outer shell (1). A connecting component (7) is disposed between the bottom cover (4) and the desulfurization equipment (2); The oil removal component (5) includes an inner cover (5-1), which is fixed inside the outer shell (1). A flue gas connecting pipe (5-2) is provided on the outside of the outer shell (1). The flue gas connecting pipe (5-2) is connected to the inner cover (5-1). A plurality of cooling pipes (5-3) are transversely connected between the inner cover (5-1) and the outer shell (1). Both ends of the cooling pipes (5-3) are connected to circulation pipes (5-4).

2. The purification and treatment device for coke oven flue gas dust and tar according to claim 1, characterized in that, The inner cover (5-1) has several ventilation holes (5-5) around its surface. The outer shell (1) has a discharge cover (5-6) on its side surface. The discharge cover (5-6) is connected to the inner cover (5-1). The bottom of the discharge cover (5-6) has a connecting pipe (5-7).

3. The purification and treatment device for coke oven flue gas dust and tar according to claim 2, characterized in that, The outer shell (1) is laterally rotatably connected to a rotating shaft (5-8), which is driven by electricity to rotate. A scraper (5-9) is fixedly connected to the rotating shaft (5-8), and the end face of the scraper (5-9) slides and fits against the surface of the inner cover (5-1) for a circumference.

4. The purification and treatment device for coke oven flue gas dust and tar according to claim 1, characterized in that, The dust removal assembly (6) includes an inner partition (6-1), which is fixed inside the outer shell (1). A pair of telescopic cylinders (6-2) are vertically mounted on the outer surface of the outer shell (1), and the output end of the telescopic cylinders (6-2) is connected to a bottom shell (6-3).

5. The purification and treatment device for coke oven flue gas dust and tar according to claim 4, characterized in that, The inner partition (6-1) has several openings (6-4) on its surface. A bracket (6-5) is provided around the top of the bottom shell (6-3). A filter bag (6-6) is installed on the bracket (6-5). The filter bag (6-6) is located in the bottom shell (6-3). The bottom cover (4) is connected to the bottom of the bottom shell (6-3).

6. The purification and treatment device for coke oven flue gas dust and tar according to claim 1, characterized in that, The connecting assembly (7) includes a docking cover (7-1), which is fixedly connected to the bottom of the base cover (4) by bolts. The desulfurization equipment (2) is provided with a main pipe (7-2) at the air inlet end.

7. The purification and treatment device for coke oven flue gas dust and tar according to claim 6, characterized in that, One end of the main pipe (7-2) is connected to the docking cover (7-1) by a telescopic pipe (7-3). A pair of docking cylinders (7-4) are horizontally connected to the main pipe (7-2). The output end of the docking cylinders (7-4) is connected to the docking cover (7-1).

8. The purification and treatment device for coke oven flue gas dust and tar according to claim 1, characterized in that, The inner cover (5-1) has an overall cylindrical structure.

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