Coke oven smoke exhaust device

Abstract

The utility model provides a smoke exhaust device of a coke oven, which relates to the technical field of smoke exhaust of coke ovens and comprises a flue, two ends of which are respectively connected with the coke oven and a chimney; the input end and the output end of the desulfurization and denitrification system are connected with the flue; the at least two first valves are arranged on the flue and located between the connecting position of the input end of the desulfurization and denitrification system on the flue and the connecting position of the output end of the desulfurization and denitrification system on the flue; the problems that in the prior art, it is difficult to ensure reliable and rapid opening of a quick-opening gate valve on a flue, and maintenance is inconvenient are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coke oven smoke exhaust, and more specifically relates to a coke oven smoke exhaust device. Background Art

[0002] Environmental protection requirements require coke oven flue gas to undergo desulfurization and denitrification treatment to meet standards before discharge. Currently, most companies install a quick-opening flue damper valve in the coke oven's underground flue. A hole in the flue's front end directs the flue gas into the desulfurization and denitrification system. After purification, the flue gas is then returned to the chimney through the rear end. If the desulfurization and denitrification system malfunctions, the quick-opening damper valve must open quickly to direct the flue gas into the chimney, otherwise there is a risk of explosion in the coke oven system.

[0003] Because the underground flue quick-opening gate valve is in a high temperature and corrosive environment of about 190℃ to 320℃ for a long time, and due to its normally closed state, it cannot be effectively maintained and serviced, and the gate deformation and corrosion jamming are prone to occur; when the desulfurization and denitrification system fails, the underground flue quick-opening gate valve is difficult to ensure smooth opening, and sometimes it cannot even be opened, seriously affecting the safe and stable production of the coke oven system.

[0004] In summary, the most direct factor restricting the safe and stable operation of the coke oven system is the stable operation of the desulfurization and denitrification systems. Once the desulfurization and denitrification systems fail, the key challenge is the reliable and rapid opening of the flue quick-opening gate valve. Therefore, the reliable and rapid opening and daily maintenance of the coke oven underground flue quick-opening gate valve become particularly important. Utility Model Content

[0005] The purpose of the utility model is to provide a coke oven smoke exhaust device to address the deficiencies in the prior art, thereby solving the problems in the prior art of difficult to ensure reliable and rapid opening of the quick-opening gate valve on the flue and inconvenient maintenance.

[0006] In order to achieve the above-mentioned object, the utility model provides a coke oven smoke exhaust device, comprising:

[0007] a flue, the two ends of which are connected to the coke oven and the chimney respectively;

[0008] A desulfurization and denitrification system, wherein the input end and the output end of the desulfurization and denitrification system are connected to the flue;

[0009] At least two first valves are provided on the flue and are located between a connection position of an input end of the desulfurization and denitrification system on the flue and a connection position of an output end of the desulfurization and denitrification system on the flue.

[0010] Optionally, two first valves are provided, and the opening and closing states of the two first valves are different.

[0011] Optionally, the distance between the two first valves is 0.5-1 m.

[0012] Optionally, the flue is an underground flue.

[0013] Optionally, the input end of the desulfurization and denitrification system is connected to a first position on the flue through a first pipeline, and the output end of the desulfurization and denitrification system is connected to a second position on the flue through a second pipeline, and the first position is upstream of the second position.

[0014] Optionally, a second valve and a third valve are provided on the first pipeline and the second pipeline respectively.

[0015] Optionally, the first valve is an electric gate valve.

[0016] Optionally, a timing switch is further included, which is connected to the first valve and can control the opening and closing state of the first valve at a fixed time.

[0017] The utility model provides a coke oven smoke exhaust device, which has the following beneficial effects: the coke oven smoke exhaust device is connected to the flue through a desulfurization and denitrification system, so as to realize desulfurization and denitrification treatment of the flue gas and meet the emission standards; at the same time, at least two first valves are provided between the connection position on the flue of the input end of the desulfurization and denitrification system and the connection position on the flue of the output end of the desulfurization and denitrification system; the first valves can be used to cut off the channel in the flue that directly flows to the chimney; at least one of the at least two first valves is in a closed state, that is, in use, and the remaining first valves can be in an open state, that is, in deactivated state; this makes it convenient to inspect, maintain, service, repair, debug and even replace the first valve in deactivated state, so as to ensure that it is in the best state that can be opened reliably and quickly during its operation cycle; the alternating use of the at least two first valves can achieve the goal of not affecting the safe and stable operation of the coke oven system and the desulfurization and denitrification system, and can facilitate the maintenance of the first valves and ensure that they can be opened reliably and quickly.

[0018] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0020] Figure 1 The figure shows a structural schematic diagram of a coke oven smoke exhaust device according to an embodiment of the present utility model.

[0021] Figure 2 The figure shows a working sequence diagram of two first valves of a coke oven smoke exhaust device according to an embodiment of the present utility model.

[0022] Description of reference numerals:

[0023] 1. Flue; 2. Coke oven; 3. Chimney; 4. Desulfurization and denitrification system; 5. First valve; 6. Second valve; 7. Third valve; 8. Timer switch. DETAILED DESCRIPTION

[0024] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0025] like Figure 1 As shown, the utility model provides a coke oven smoke exhaust device, comprising:

[0026] Flue 1, both ends of which are connected to the coke oven 2 and the chimney 3 respectively;

[0027] A desulfurization and denitrification system 4, wherein the input end and the output end of the desulfurization and denitrification system 4 are connected to the flue 1;

[0028] At least two first valves 5 are provided on the flue 1 and are located between the connection position of the input end of the desulfurization and denitrification system 4 on the flue 1 and the connection position of the output end of the desulfurization and denitrification system 4 on the flue 1 .

[0029] Specifically, in order to solve the problem that the quick-opening gate valve on the flue 1 in the prior art is difficult to ensure reliable and rapid opening, and is inconvenient to maintain; the smoke exhaust device of the coke oven 2 provided by the utility model is connected to the flue 1 through the desulfurization and denitrification system 4, so as to realize the desulfurization and denitrification treatment of the flue gas in the flue 1 and meet the emission standards. At the same time, at least two first valves 5 are provided between the connection position of the input end of the desulfurization and denitrification system 4 on the flue 1 and the connection position of the output end of the desulfurization and denitrification system 4 on the flue 1. The first valves 5 can cut off the channel in the flue 1 that directly flows to the chimney 3. , at least one of the two first valves 5 is guaranteed to be in a closed state during operation, that is, in a commissioning state, and the other first valves 5 can be in an open state, that is, in a decommissioned state. This makes it convenient to inspect, maintain, service, repair, debug, and even replace the first valve 5 in a decommissioned state, ensuring that it is in the best state for reliable and rapid opening during its commissioning cycle. The alternating commissioning of at least two first valves 5 can achieve the goal of not affecting the safe and stable operation of the coke oven 2 system and the desulfurization and denitrification system 4, and can facilitate the maintenance of the first valve 5, ensuring that it is reliable and rapid opening.

[0030] Optionally, two first valves 5 are provided, and the opening and closing states of the two first valves 5 are different.

[0031] Specifically, the closed state of the first valve 5 is the activated state, and the open state is the deactivated state. One of the two first valves 5 is always in the activated state, while the other can be in the deactivated state.

[0032] In this embodiment, if Figure 2 As shown, the two first valves 5 are switched and put into use according to the commissioning cycle T. If the initial state of one first valve 5 is closed, that is, the commissioning state, the initial state of the other first valve 5 is open, that is, the deactivated state. When the commissioning cycle T is reached, the opening and closing state of the other first valve 5 is switched first to put it into use, and then the opening and closing state of the first valve 5 is switched to deactivate it; when the commissioning cycle T is reached again, the opening and closing state of one first valve 5 is switched first to put it into use, and then the opening and closing state of the other first valve 5 is switched to deactivate it; in this way, the commissioning state and the deactivation state of the two first valves 5 are cyclically switched according to the commissioning cycle T, and this cycle T can be set according to actual working conditions and needs.

[0033] In this embodiment, the commissioning period T is 2 weeks to one month.

[0034] Optionally, the distance between the two first valves 5 is 0.5-1 m.

[0035] Specifically, in order to avoid affecting the suction of the flue 1 when the two first valves 5 are switched, the distance between the two first valves 5 should be smaller to reduce the flue gas volume therebetween; the flue gas volume m between the two first valves 5 is selected according to m≤1%*M, where M is the flue gas volume between the main exhaust fan of the desulfurization and denitrification system 4 and the nearest first valve 5. Generally, the installation distance between the two first valves 5 can be set to 0.5-1.0 meters.

[0036] Optionally, the flue 1 is an underground flue 1 .

[0037] Optionally, the input end of the desulfurization and denitrification system 4 is connected to a first position on the flue 1 through a first pipeline, and the output end of the desulfurization and denitrification system 4 is connected to a second position on the flue 1 through a second pipeline, and the first position is upstream of the second position.

[0038] Optionally, a second valve 6 and a third valve 7 are provided on the first pipeline and the second pipeline respectively.

[0039] Specifically, the second valve 6 and the third valve 7 are used to control the opening and closing of the first pipeline along which the gas enters the desulfurization and denitrification system 4 and the opening and closing of the second pipeline along which the gas flows out of the desulfurization and denitrification system 4, respectively; when the desulfurization and denitrification system 4 fails, the second valve 6 and the third valve 7 are closed, and the first valve 5 which is currently in use is opened at the same time; at this time, the flue gas from the coke oven 2 can be smoothly introduced into the chimney 3 and discharged into the atmosphere, eliminating the hidden danger that the flue 1 cannot be opened smoothly or cannot be opened at all.

[0040] Optionally, the first valve 5 is an electric gate valve.

[0041] Specifically, the first valve 5 is an electric gate valve, which is convenient for electronically controlled opening and closing.

[0042] Optionally, a timing switch 8 is further included, which is connected to the first valve 5 and can control the opening and closing state of the first valve 5 at a fixed time.

[0043] Specifically, by providing the timing switch 8 , it is convenient to set the commissioning cycle of the first valve 5 , thereby facilitating the timed electronically controlled opening and closing of the two first valves 5 .

[0044] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A coke oven smoke exhaust device, characterized in that: include: a flue, the two ends of which are connected to the coke oven and the chimney respectively; A desulfurization and denitrification system, wherein the input end and the output end of the desulfurization and denitrification system are connected to the flue; At least two first valves are provided on the flue and are located between a connection position of an input end of the desulfurization and denitrification system on the flue and a connection position of an output end of the desulfurization and denitrification system on the flue.

2. The coke oven smoke exhaust device according to claim 1, characterized in that: There are two first valves, and the opening and closing states of the two first valves are different.

3. The coke oven smoke exhaust device according to claim 2, characterized in that: The distance between the two first valves is 0.5-1 m.

4. The coke oven smoke exhaust device according to claim 1, characterized in that: The flue is an underground flue.

5. The coke oven fume exhaust device according to claim 1, characterized in that: The input end of the desulfurization and denitrification system is connected to a first position on the flue through a first pipeline, and the output end of the desulfurization and denitrification system is connected to a second position on the flue through a second pipeline, and the first position is upstream of the second position.

6. The coke oven smoke exhaust device according to claim 5, characterized in that: A second valve and a third valve are respectively provided on the first pipeline and the second pipeline.

7. The coke oven smoke exhaust device according to claim 2, characterized in that: The first valve is an electric gate valve.

8. The coke oven smoke exhaust device according to claim 7, characterized in that: It also includes a timing switch, which is connected to the first valve and can control the opening and closing state of the first valve at a fixed time.

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