Dry quenching diffusing system of coking plant
By installing an independent venting pipe and pretreatment device outside the dust collection hood on the top of the dry quenching furnace, the safety hazard of high-temperature flue gas carrying flames into the environment for dust removal was solved, thus achieving safe and continuous dry quenching coke production.
Patent Information
- Application Number
- CN202511810639.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-03
- Publication Date
- 2026-03-03
AI Technical Summary
In existing dry quenching venting systems, high-temperature flue gas carrying flames enters the environmental dust removal device, causing safety hazards and equipment damage, and affecting production safety.
An independent common venting pipe is set outside the dust collection hood on the top of the dry quenching furnace, and the flue gas is treated by a pretreatment device, including a spray tank, a cyclone separator, a wire mesh demister and a waste heat preheating section. Finally, the flue gas is treated by a bag filter to prevent the flue gas from entering the dust collection hood and dust collection pipe.
This effectively prevented high-temperature flue gas from carrying flames into the dust collection hood and dust removal pipeline, eliminating safety hazards and ensuring the continuity and safety of dry quenching coke production.
Smart Images
Figure CN121589099A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of coking dry quenching venting technology, specifically relating to a coking plant dry quenching venting system. Background Technology
[0002] In the existing technology, apart from the emergency venting at the top of the primary dust collector, all other venting from the dry quenching furnace is concentrated in the dust collection hood on the top platform of the dry quenching furnace. The environmental dust collector fan operates to draw these vented flues to the environmental dust collector for further treatment.
[0003] However, because the venting system on the top of the dry quenching furnace is typically located in the pre-storage section, which contains hot coke loaded for dry quenching, the temperature here is often above 1000℃. If the material level in the dry quenching furnace is high, high-temperature circulating gas carrying sparks or flames can frequently pass through the dust collection hood on the furnace top. Under the action of the dust removal fan, this gas is drawn into the environment, posing a safety hazard. Furthermore, during routine dry quenching production, in the event of a sudden accident or planned maintenance shutdown of the circulating fan, the system pressure can rise due to the inability to properly discharge gas, exceeding the set value. The venting system will then open due to positive pressure, releasing excess gas to relieve the pressure. This situation can cause the dust collection hood and dust removal pipes on the top of the dry quenching furnace to become red-hot and deformed. In severe cases, it can draw flames into the environment, causing an explosion and posing a significant safety hazard to dry quenching.
[0004] In view of the above factors, a dry quenching venting system for coking plants is provided, which can solve the technical problem of safety hazards caused by commonly used venting systems that allow flame-laden flue gas to enter the environment for dust removal. Field use has proven that the system works very well and achieves the expected results. Summary of the Invention
[0005] The purpose of this invention is to provide a dry quenching venting system for coking plants to solve the problems mentioned in the background art.
[0006] The objective of this invention is achieved through the following technical solution: a coking plant dry quenching venting system, comprising a common venting pipe, wherein the common venting pipe is located outside the dust collection hood A on the top of the dry quenching furnace, and the common venting pipe is connected to the dust collection hood B on the top of the dry quenching furnace;
[0007] The outlet end of the dust collection hood B on the top of the dry quenching furnace is connected to a pretreatment device. The pretreatment device includes a first treatment section and a second treatment section, which are connected in series. The outlet of the second treatment section is directly discharged to the outside.
[0008] Furthermore, the dust collection hood B on the top of the dry quenching furnace includes a cubic shell and a buffer section welded to the cubic shell. The buffer section is formed by splicing and welding together shells with triangular sides and square sides.
[0009] A curved pipe is fixedly welded onto the dust collection hood B on the top of the dry quenching furnace, and the curved pipe is connected to the inlet of the pretreatment device.
[0010] Furthermore, the connection between the curved pipe and the dust collection hood B on the top of the dry quenching furnace is a narrow air passage, which has an elliptical structure.
[0011] Furthermore, the cross-section of the commonly used venting pipe outside the dust collection hood A on the top of the dry quenching furnace is arranged in a trapezoidal structure. Two sets of commonly used venting pipes are arranged in parallel, and the commonly used venting pipes are connected to the dust collection hood B on the top of the dry quenching furnace.
[0012] Furthermore, the first processing section includes a spray tank, the inlet of which is at the bottom and the outlet at the top;
[0013] The first processing section also includes a cyclone separator connected to the outlet of the spray tank, the cyclone separator being connected to a wire mesh demister.
[0014] Furthermore, the spray tank has a hollow tube structure, and spray pipe layers are provided on the upper and lower sides inside the spray tank. The spray layer is composed of several spray pipes, and the spray pipes are connected to an external water inlet pipe. A circulation pipe interface is provided at the bottom of the spray tank, and the circulation pipe is connected to the external water inlet pipe.
[0015] Furthermore, the second processing section includes a waste heat preheating section, which includes two shell-and-tube heat exchangers connected in parallel or in series, and the outlet of the shell-and-tube heat exchangers is connected to a bag filter.
[0016] Furthermore, the bottom of the dust collection hood B on the top of the dry quenching furnace is made of four support legs using channel steel, and two fixing frames are welded crosswise on both sides of the support legs using angle steel.
[0017] The application of a coking plant dry quenching venting system effectively prevents the safety hazards caused by the introduction of flame-laden flue gas from the commonly used venting points into dust collection hoods, dust removal pipelines, and environmental dust removal, thus ensuring normal dry quenching production and extending the continuous production operation time of dry quenching.
[0018] An application method for a dry quenching venting system in a coking plant includes the following steps;
[0019] Instead of collecting the high-temperature flue gas from the large dust collection hood and then drawing it to the environmental dust removal system for treatment, the original design of the common venting system was changed to move the common venting pipe from inside the dust collection hood to outside the dust collection hood. The original design of the furnace top venting dust collection hood was made smaller, and the common venting pipe was moved separately outside the dry quenching furnace top dust collection hood A. A separate dry quenching furnace top dust collection hood B for common venting was also made.
[0020] Due to special circumstances, the high-temperature circulating gas with flames enters the dust collection hood B on the top of the dry quenching furnace. When passing through the common vent pipe, because the cross-section of the common vent pipe is set in a trapezoidal structure, there are two sets of common vent pipes set in parallel. The common vent pipe is connected to the dust collection hood B on the top of the dry quenching furnace. The high-temperature circulating gas with flames undergoes the first slow treatment under the action of the trapezoidal structure of the common vent pipe, and enters the pretreatment device through the narrow air passage at the connection between the curved pipe and the dust collection hood B on the top of the dry quenching furnace. The flue gas treated by the pretreatment device is discharged.
[0021] The above-mentioned method allows the high-temperature flue gas that is normally emitted to be directly discharged into the atmosphere without passing through the large dust collection hood and main dust removal pipeline for environmental dust removal. This eliminates the safety hazards caused by high-temperature circulating gas with flames burning the dust collection hood and dust removal pipeline in special circumstances.
[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0023] This invention relates to a method for modifying the treatment of high-temperature flue gas emitted from the commonly used venting system in dry quenching coke. Instead of the original design where the high-temperature flue gas was collected by a large dust collection hood and then drawn into an environmental dust collector for treatment, the method involves moving the commonly used venting pipe from inside the dust collection hood to outside. This requires first reducing the size of the original furnace top venting dust collection hood, then separately moving the commonly used venting pipe outside the dust collection hood, and finally fabricating a separate small dust collection hood for the commonly used venting system.
[0024] This invention solves the technical problems and safety hazards caused by the commonly used venting in dry quenching coke. By modifying the commonly used venting pipe, it effectively prevents the safety hazards caused by the flame-carrying flue gas discharged from the commonly used venting point being brought into the dust collection hood, dust removal pipeline and environmental dust removal, thus ensuring the normal production of dry quenching coke and extending the continuous production operation time of dry quenching coke. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall connection of the present invention;
[0026] Figure 2 This is a schematic diagram of the dust collection hood B on the top of the dry quenching furnace according to the present invention;
[0027] Figure 3 This is a schematic diagram of the first processing section of the present invention;
[0028] Figure 4 This is a schematic diagram of the second processing section of the present invention. Detailed Implementation
[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 invention.
[0032] like Figure 1-4 As shown, a coking plant dry quenching venting system includes a common venting pipe 1, which is located outside the dry quenching furnace top dust collection hood A2 and is connected to the dry quenching furnace top dust collection hood B3.
[0033] The outlet end of the dust collection hood B3 on the top of the dry quenching furnace is connected to a pretreatment device 4. The pretreatment device 4 includes a first treatment section 5 and a second treatment section 6, which are connected in series. The outlet of the second treatment section 6 is directly discharged to the outside. An induced draft fan is installed between the first treatment section 5 and the second treatment section 6.
[0034] In order to form an independent venting structure on the outside, the dust collection hood B on the top of the dry quenching furnace includes a cubic shell and a buffer section welded to the cubic shell. The buffer section is spliced and welded from a shell with two triangular sides and two square sides.
[0035] A curved pipe is fixedly welded onto the dust collection hood B on the top of the dry quenching furnace, and the curved pipe is connected to the inlet of the pretreatment device.
[0036] The aforementioned dust collection hood B on the top of the dry quenching furnace prevents the flue gas with flames emitted from the commonly used venting point from being carried into the original dust collection hood, dust removal pipeline, and environmental dust collection, thus avoiding the safety hazards of burning the original dust collection hood, dust removal pipeline, and bringing dust into the environment, thereby ensuring the normal production of dry quenching coke.
[0037] In order to facilitate the reduction of flue gas with flames during use, the connection between the curved pipe 9 and the dust collection hood B3 on the top of the dry quenching furnace is a narrow air passage with an elliptical structure.
[0038] The cross-section of the commonly used venting pipe 1 outside the dust collection hood A2 on the top of the dry quenching furnace is set in a trapezoidal structure. Two sets of commonly used venting pipes 1 are set and arranged in parallel. The commonly used venting pipes 1 are connected to the dust collection hood B3 on the top of the dry quenching furnace.
[0039] In use, the first treatment section 5 is used to cool down the flue gas containing flames. The first treatment section 5 includes a spray tank 10, with the inlet end of the spray tank 10 at the bottom and the outlet end at the top.
[0040] The first processing section 5 also includes a cyclone separator 11 connected to the outlet of the spray tank 10. The cyclone separator 11 and the wire mesh demister 12 are connected, and an induced draft fan is provided between the spray tank 10 and the cyclone separator 11. The wire mesh demister 12 is a cylindrical structure, and a wire mesh demister structure with upper and lower intervals is provided inside the cylindrical structure. The wire mesh demister structure is made of 304 stainless steel.
[0041] The spray tank 10 has a hollow tube structure. The spray tank 10 is provided with upper and lower spray pipe layers 13. The spray layer 13 is composed of several spray pipes. The spray pipes are connected to the external water inlet pipe. The bottom of the spray tank 10 is provided with a circulation pipe interface, and the circulation pipe is connected to the external water inlet pipe.
[0042] In operation, the flue gas is dried. The second treatment section 6 includes a waste heat preheating section, which includes two shell-and-tube heat exchangers 14 connected in parallel or in series. The outlet of the shell-and-tube heat exchanger 14 is connected to a bag filter 15.
[0043] The flue gas treated by the waste heat preheating section and the bag filter can be discharged externally or connected to the circulating gas pipeline connected to the boiler through a pipeline to participate in the circulation.
[0044] To provide support during use, the bottom of the dry quenching furnace top dust collection hood B3 is made of four support legs using channel steel, and two fixing frames are welded crosswise on both sides of the support legs using angle steel.
[0045] The application of a coking plant dry quenching venting system effectively prevents the safety hazards caused by the introduction of flame-laden flue gas from the commonly used venting points into dust collection hoods, dust removal pipelines, and environmental dust removal, thus ensuring normal dry quenching production and extending the continuous production operation time of dry quenching.
[0046] An application method for a dry quenching venting system in a coking plant includes the following steps;
[0047] Instead of collecting the high-temperature flue gas from the large dust collection hood and then drawing it to the environmental dust removal system for treatment, the original design of the common venting system was changed to move the common venting pipe from inside the dust collection hood to outside the dust collection hood. The original design of the furnace top venting dust collection hood was made smaller, and the common venting pipe was moved separately outside the dry quenching furnace top dust collection hood A. A separate dry quenching furnace top dust collection hood B for common venting was also made.
[0048] Due to special circumstances, the high-temperature circulating gas with flames enters the dust collection hood B on the top of the dry quenching furnace. When passing through the common vent pipe, because the cross-section of the common vent pipe is set in a trapezoidal structure, there are two sets of common vent pipes set in parallel. The common vent pipe is connected to the dust collection hood B on the top of the dry quenching furnace. The high-temperature circulating gas with flames undergoes the first slow treatment under the action of the trapezoidal structure of the common vent pipe, and enters the pretreatment device through the narrow air passage at the connection between the curved pipe and the dust collection hood B on the top of the dry quenching furnace. The flue gas treated by the pretreatment device is discharged.
[0049] The above-mentioned method allows the high-temperature flue gas that is normally emitted to be directly discharged into the atmosphere without passing through the large dust collection hood and main dust removal pipeline for environmental dust removal. This eliminates the safety hazards caused by high-temperature circulating gas with flames burning the dust collection hood and dust removal pipeline in special circumstances.
[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A dry quenching venting system for a coking plant, characterized in that: It includes a common venting pipe (1), which is located outside the dust collection hood A (2) on the top of the dry quenching furnace and is connected to the dust collection hood B (3) on the top of the dry quenching furnace. The outlet end of the dust collection hood B (3) on the top of the dry quenching furnace is connected to a pretreatment device (4). The pretreatment device (4) includes a first treatment section (5) and a second treatment section (6). The first treatment section (5) and the second treatment section (6) are connected in series, and the outlet of the second treatment section (6) is directly discharged to the outside.
2. The coking plant dry quenching venting system according to claim 1, characterized in that: The dust collection hood B(3) on the top of the dry quenching furnace includes a cubic shell (7) and a buffer section (8) welded to the cubic shell (7). The buffer section (8) is formed by splicing and welding the shells of the two sides of the triangle and the two sides of the square. A bent pipe (9) is fixedly welded onto the dust collection hood B (3) on the top of the dry quenching furnace, and the bent pipe (9) is connected to the inlet of the pretreatment device (4).
3. The coking plant dry quenching venting system according to claim 2, characterized in that: The connection between the curved pipe (9) and the dust collection hood B (3) on the top of the dry quenching furnace is a narrow air passage, which has an elliptical structure.
4. The coking plant dry quenching venting system according to claim 3, characterized in that: The cross-section of the commonly used venting pipe (1) outside the dust collection hood A (2) of the dry quenching furnace top is set in a trapezoidal structure. Two sets of commonly used venting pipes (1) are set and arranged in parallel. The commonly used venting pipes (1) are connected to the dust collection hood B (3) of the dry quenching furnace top.
5. The coking plant dry quenching venting system according to claim 4, characterized in that: The first processing section (5) includes a spray tank (10), the inlet end of which is at the bottom and the outlet end is at the top; The first processing section (5) also includes a cyclone separator (11) connected to the outlet of the spray tank (10), the cyclone separator (11) and the wire mesh demister (12).
6. The coking plant dry quenching venting system according to claim 5, characterized in that: The spray tank (10) has a hollow tube structure. The spray tank (10) is provided with upper and lower spray pipe layers (13). The spray layer (13) is composed of several spray pipes. The spray pipes are connected to the external water inlet pipe. The bottom of the spray tank (10) is provided with a circulation pipe interface, and the circulation pipe is connected to the external water inlet pipe.
7. The coking plant dry quenching venting system according to claim 6, characterized in that: The second processing section (6) includes a waste heat preheating section, which includes two shell-and-tube heat exchangers (14) connected in parallel or in series. The outlet of the shell-and-tube heat exchanger (14) is connected to a bag filter (15).
8. The coking plant dry quenching venting system according to claim 7, characterized in that: The bottom of the dust collection hood B(3) of the dry quenching furnace is made of four support legs by channel steel, and two fixing frames are welded to both sides of the support legs by angle steel.
9. An application of the dry quenching venting system for coking plants according to claim 8, characterized in that: Applying the coking plant dry quenching venting system described in claim 8 to the treatment of high-temperature flue gas discharged from the commonly used dry quenching venting point effectively prevents the safety hazards caused by the flame-carrying flue gas discharged from the commonly used venting point being brought into the dust collection hood, dust removal pipeline and environmental dust removal, ensuring normal dry quenching production and extending the continuous production operation time of dry quenching.
10. An application method of the dry quenching coke venting system in a coking plant according to claim 8, characterized in that: Includes the following steps; Instead of collecting the high-temperature flue gas from the large dust collection hood and then drawing it to the environmental dust removal system for treatment, the original design of the common venting system was changed to move the common venting pipe from inside the dust collection hood to outside the dust collection hood. The original design of the furnace top venting dust collection hood was made smaller, and the common venting pipe was moved separately outside the dry quenching furnace top dust collection hood A. A separate dry quenching furnace top dust collection hood B for common venting was also made. Due to special circumstances, the high-temperature circulating gas with flames enters the dust collection hood B on the top of the dry quenching furnace. When passing through the common vent pipe, because the cross-section of the common vent pipe is set in a trapezoidal structure, there are two sets of common vent pipes set in parallel. The common vent pipe is connected to the dust collection hood B on the top of the dry quenching furnace. The high-temperature circulating gas with flames undergoes the first slow treatment under the action of the trapezoidal structure of the common vent pipe, and enters the pretreatment device through the narrow air passage at the connection between the curved pipe and the dust collection hood B on the top of the dry quenching furnace. The flue gas treated by the pretreatment device is discharged. The above-mentioned method allows the high-temperature flue gas that is normally emitted to be directly discharged into the atmosphere without passing through the large dust collection hood and main dust removal pipeline for environmental dust removal. This eliminates the safety hazards caused by high-temperature circulating gas with flames burning the dust collection hood and dust removal pipeline in special circumstances.