Gas treatment device for pre-storage chamber of dry quenching furnace

Abstract

The utility model discloses a gas treatment device for a prestorage chamber of a dry quenching furnace, which relates to the technical field of dry quenching production and comprises the dry quenching furnace, a primary dust remover, a cooling system and a high-temperature flue gas guide pipe, an annular air duct communicated with the interior of the dry quenching furnace is arranged on the periphery of the prestorage chamber of the dry quenching furnace, and an inlet of the primary dust remover is communicated with the annular air duct; an outlet of the primary dust remover is communicated with an inlet of the cooling system, an outlet of the cooling system is communicated with a cooling chamber of the dry quenching furnace, a first middle bolt hole is formed in the annular air duct and used for inputting air, and one end of the high-temperature flue gas guide pipe is connected and communicated with the top of a dry quenching furnace pre-storage chamber. And the other end is connected and communicated with the annular air duct and / or the inlet of the primary dust remover. The gas treatment device for the pre-storage chamber of the dry quenching furnace, provided by the utility model, can prevent detonation when red coke is filled, reduce the combustion degree of coke powder, avoid overtemperature of an inlet of a cooling system, and is higher in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of dry quenching coke production, in particular to a gas processing device for a pre-storage chamber of a dry quenching furnace. Background Art

[0002] As an environmentally friendly and energy-saving technology, CDQ has been widely used in coking enterprises in recent years. The CDQ furnace is the main cooling equipment of the CDQ unit. The upper part of the CDQ furnace is a pre-storage chamber, the middle is a ramp area, and the lower part is a cooling chamber. The outer periphery of the straight section of the pre-storage chamber is a ring air duct connected to the CDQ furnace ramp area. The ring air duct is connected to the inlet of the primary dust collector, the outlet of the primary dust collector is connected to the inlet of the cooling system, and the outlet of the cooling system is connected to the cooling chamber. When the CDQ furnace is operating, circulating gas is introduced into the cooling chamber. After heat exchange with the high-temperature red coke, it passes through the ring air duct and the primary dust collector and enters the cooling system. The cooled circulating gas is then introduced into the cooling chamber to cool the red coke.

[0003] During the CDQ process, the top cover of the pre-chamber must be opened intermittently to load red coke. During this process, the hot gas in the pre-chamber is displaced out of the CDQ furnace by the red coke. Residual volatiles (primarily CO and H₂) in the red coke charged into the pre-chamber continuously precipitate and accumulate in large quantities in the space above the pre-chamber. This can easily lead to safety issues such as explosions when the cover is opened if production control issues arise. Furthermore, the hot, combustible gas in the upper part of the pre-chamber passes through the red-hot coke layer and enters the annular air duct along with the circulating gas. To reduce the combustible gas content in the CDQ system's circulating gas, air is typically introduced through the central bolt hole in the annular air duct to react with the CO and H₂ in the circulating gas within the annular air duct. However, the hot, combustible gas at the top of the pre-chamber carries a large amount of coke fines as it passes through the red-hot coke layer. The coke fines burn in the annular air duct, generating a significant amount of heat and easily causing overheating at the CDQ cooling system inlet. Therefore, there is an urgent need to address the explosions and overheating of the cooling system inlet caused by the accumulation of hot, combustible gas at the top of the pre-chamber. Utility Model Content

[0004] The purpose of the utility model is to provide a gas treatment device for the pre-storage chamber of a dry quenching furnace to solve the problems existing in the above-mentioned prior art, to prevent explosion when filling red coke, and to avoid overheating at the inlet of the cooling system, thereby improving safety.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] A gas treatment device for a dry quenching furnace pre-chamber comprises: a dry quenching furnace, a primary dust collector, a cooling system and a high-temperature flue gas duct, wherein an annular air duct connected to the interior of the dry quenching furnace is provided outside the dry quenching furnace pre-chamber, the inlet of the primary dust collector is connected to the annular air duct, the outlet of the primary dust collector is connected to the inlet of the cooling system, and the outlet of the cooling system is connected to the cooling chamber of the dry quenching furnace, the annular air duct has a first middle bolt hole, and the first middle bolt hole is used to input air, one end of the high-temperature flue gas duct is connected to and communicated with the top of the dry quenching furnace pre-chamber, and the other end is connected to and communicated with the inlet of the annular air duct and / or the primary dust collector.

[0007] Preferably, the high-temperature flue gas duct includes a first air duct, a second air duct and a third air duct, one end of the first air duct is connected to and communicated with the top of the dry quenching furnace pre-storage chamber, one end of the second air duct is connected to and communicated with the end of the first air duct away from the dry quenching furnace, and the other end is connected to and communicated with the primary dust collector, one end of the third air duct is connected to and communicated with the end of the first air duct away from the dry quenching furnace, and the other end is connected to and communicated with the annular air duct.

[0008] Preferably, the second air duct and the third air duct are both provided with valves.

[0009] Preferably, the valves are all made of high-temperature resistant materials.

[0010] Preferably, the annular air duct also has a second center bolt hole, and the end of the third air duct away from the first air duct is connected to and communicated with the second center bolt hole; the primary dust collector is provided with a high-temperature flue gas inlet, and the high-temperature flue gas inlet is connected to and communicated with the end of the second air duct away from the first air duct.

[0011] Preferably, an emergency relief device is further included, which includes a working module and a connecting pipe, one end of the connecting pipe is connected to the top of the dry quenching furnace pre-storage chamber, and the other end of the connecting pipe is connected to the working module, and the connecting pipe forms the first air duct.

[0012] Preferably, a purge pipeline is further included, one end of which is connected to and communicated with the high-temperature flue gas duct, and the other end is used for introducing nitrogen.

[0013] Preferably, the high-temperature flue gas duct also includes a connecting duct, one end of the connecting duct is connected to the end of the first air duct away from the dry quenching furnace, and the other end has two interfaces, one interface is connected to and connected to the end of the second air duct away from the primary dust collector, and the other interface is connected to and connected to the end of the third air duct away from the annular air duct, and the purge pipeline includes a main pipeline, a first purge pipeline, a second purge pipeline and a third purge pipeline, one end of the first purge pipeline is connected to and connected to the position of the connecting duct close to the first air duct, and the other end is connected to and connected to the main pipeline; one end of the second purge pipeline is connected to and connected to the position of the second air duct close to the primary dust collector, and the other end is connected to and connected to the main pipeline, one end of the third purge pipeline is connected to and connected to the position of the third air duct close to the annular air duct, and the other end is connected to the main pipeline.

[0014] Preferably, the high-temperature flue gas duct is made of high-temperature resistant metal material.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The utility model provides a gas treatment device for the CDQ furnace pre-storage chamber. Since the high-temperature combustible gas at the top of the CDQ furnace is led out of the CDQ furnace, when the furnace cover is opened to load red coke, the content of the high-temperature combustible gas at the top of the pre-storage chamber is reduced, that is, explosion is less likely to occur. Moreover, the high-temperature combustible gas is directly led out from the top of the CDQ furnace without passing through the red coke layer in the pre-storage chamber, thereby reducing the coke powder content in the high-temperature combustible gas. This rapid way of leading the gas from the pre-storage chamber reduces the degree of coke powder combustion, avoids overheating of the CDQ boiler inlet, and improves safety.

[0017] Furthermore, high-temperature combustible gas is continuously discharged from the connecting pipe of the emergency relief device, avoiding low-temperature sulfur corrosion and coke powder deposition problems in the emergency relief pipe, which is more conducive to production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the structure of the CDQ furnace provided by the utility model;

[0020] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0021] In the figure: 1-CDQ furnace, 2-annular air duct, 3-primary dust collector, 4-cooling system, 5-high-temperature flue gas duct, 51-first duct, 52-second duct, 53-third duct, 54-valve, 55-connecting duct, 6-purge pipeline, 61-main pipeline, 62-first duct, 63-second duct, 64-third duct, 7-emergency relief device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The purpose of the utility model is to provide a gas treatment device for the pre-storage chamber of a dry quenching furnace to solve the problems existing in the above-mentioned prior art, to prevent explosion when filling red coke, and to avoid overheating at the inlet of the cooling system, thereby improving safety.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] The utility model provides a gas treatment device for the pre-storage chamber of a dry quenching furnace, such as Figure 1-2As shown, it includes: a dry quenching furnace 1, a primary dust collector 3, a cooling system 4 and a high-temperature flue gas duct 5. An annular air duct 2 is provided outside the pre-storage chamber of the dry quenching furnace 1 to connect to the interior of the dry quenching furnace 1. The inlet of the primary dust collector 3 is connected to the annular air duct 2, the outlet of the primary dust collector 3 is connected to the inlet of the cooling system 4, the outlet of the cooling system 4 is connected to the cooling chamber of the dry quenching furnace 1, the annular air duct 2 has a first middle bolt hole for inputting air, one end of the high-temperature flue gas duct 5 is connected and connected to the top of the pre-storage chamber of the dry quenching furnace 1, and the other end is connected and connected to the inlet of the annular air duct 2 and / or the primary dust collector 3. The dry quenching furnace pre-storage chamber gas treatment device provided by the utility model is such that high-temperature combustible gas can enter the middle bolt hole of the annular air duct 2 and / or the inlet of the primary dust collector 3 through the high-temperature flue gas duct 5 and burn after contacting with the air introduced into the annular air duct. The burned gas can enter the cooling system and, after cooling, be re-blown into the cooling chamber to cool the red coke. Since the high-temperature combustible gas at the top of the dry quenching furnace 1 is led out of the dry quenching furnace 1, when the furnace cover is opened to load red coke, the content of the high-temperature combustible gas at the top of the pre-storage chamber is reduced, that is, it is less likely to cause explosions; and the high-temperature combustible gas is directly led out of the top of the dry quenching furnace 1 without passing through the red coke layer in the pre-storage chamber, which reduces the coke powder content in the high-temperature combustible gas. This rapid lead-out method reduces the degree of coke powder combustion, avoids overheating at the inlet of the cooling system 4, and is safer. Among them, the cooling system 4 is composed of equipment such as the dry quenching boiler, the secondary dust collector, and the feed water preheater (heat pipe heat exchanger), all of which are existing technologies and will not be described in detail.

[0026] In a preferred embodiment of this embodiment, the high-temperature flue gas duct 5 includes a first duct 51, a second duct 52, and a third duct 53. One end of the first duct 51 is connected to and communicates with the top of the pre-storage chamber of the dry quenching furnace 1. One end of the second duct 52 is connected to and communicates with the end of the first duct 51 away from the dry quenching furnace 1, and the other end is connected to and communicates with the primary dust collector 3. One end of the third duct 53 is connected to and communicates with the end of the first duct 51 away from the dry quenching furnace 1, and the other end is connected to and communicates with the annular air duct 2. During the dry quenching coke production process, the high-temperature combustible gas at the top of the dry quenching furnace 1 enters the second duct 52 and / or the third duct 53 through the first duct 51, and then flows into the annular air duct 2 and / or the primary dust collector 3.

[0027] In a preferred embodiment of this embodiment, valves 54 are provided on both the second air duct 52 and the third air duct 53. The valves 54 on the second air duct 52 and the third air duct 53 can control the opening and closing of the second air duct 52 and the third air duct 53, respectively, to adapt to different gas flow conditions. For example, when the flow rate of high-temperature combustible gas is low, only the valve 54 on the third air duct 53 can be opened to guide the high-temperature combustible gas into the annular air duct 2 for treatment. When the gas flow rate is high, both valves 54 can be opened to guide the high-temperature combustible gas into both the annular air duct 2 and the primary dust collector 3 for treatment.

[0028] In order to ensure that each valve 54 can be used normally, in a preferred implementation of this embodiment, the valves 54 are all made of high-temperature resistant material.

[0029] In order to facilitate the discharge of high-temperature combustible gas from the top of the pre-storage chamber, in a preferred embodiment of this embodiment, the annular air duct 2 is also provided with a second middle bolt hole, and the end of the third air duct 53 away from the first air duct 51 is connected to and communicated with the second middle bolt hole; a high-temperature flue gas inlet is provided on the primary dust collector 3, and the high-temperature flue gas inlet is connected to and communicated with the end of the second air duct 52 away from the first air duct 51.

[0030] In a preferred embodiment of this embodiment, an emergency relief device 7 is also included. The emergency relief device 7 includes a working module and a connecting pipe. One end of the connecting pipe is connected to the top of the pre-storage chamber of the dry quenching furnace 1, and the other end of the connecting pipe is connected to the working module. The connecting pipe forms a first air duct 51. The connecting pipe in the existing emergency relief device 7 is provided with a control valve. Only when the emergency relief device 7 needs to be activated, the control valve is opened and the working module is used to exhaust and reduce the pressure of the dry quenching furnace 1. After the emergency relief device 7 is used, the control valve is closed. The gas discharged from the dry quenching furnace 1 contains a small amount of coke powder, which is easily deposited in the connecting pipe. As the temperature of the pipeline decreases, it will fall below the dew point, causing low-temperature sulfur corrosion in the connecting pipe, thereby causing damage to the emergency relief device 7. After the connecting pipe is set as the first air duct 51, since the high-temperature combustible gas continuously flows in the first air duct 51, the first air duct 51 can maintain a relatively high temperature, which can avoid low-temperature sulfur corrosion and coke powder deposition problems in the emergency relief device 7.

[0031] In a preferred embodiment of this embodiment, the present invention further includes a purge line 6. One end of the purge line 6 is connected to and communicates with the high-temperature flue gas duct 5, and the other end is used to introduce an inert gas. Because the high-temperature combustible gas introduced into the high-temperature flue gas duct 5 still contains a small amount of coke powder, a high content of this coke powder is prone to depositing in the duct and causing blockage. Passing an inert gas through the purge line 6 into the high-temperature flue gas duct 5 can remove the deposited coke powder and prevent blockage. Nitrogen is preferably the inert gas.

[0032] In a preferred embodiment of this embodiment, the high-temperature flue gas duct 5 also includes a connecting duct 55, one end of the connecting duct 55 is connected to the end of the first air duct 51 away from the dry quenching furnace 1, and the other end has two interfaces, one interface is connected to and connected to the end of the second air duct 52 away from the primary dust collector 3, and the other interface is connected to and connected to the end of the third air duct 53 away from the annular air duct 2, and the purge pipeline 6 includes a main pipeline 61, a first purge pipeline 62, a second purge pipeline 63 and a third purge pipeline 64, one end of the first purge pipeline 62 is connected to and connected to the position of the connecting duct 55 near the first air duct 51, and the other end is connected to and connected to the main pipeline 61; one end of the second purge pipeline 63 is connected to and connected to the position of the second air duct 52 near the primary dust collector 3, and the other end is connected to and connected to the main pipeline 61; one end of the third purge pipeline 64 is connected to the position of the third air duct 53 near the annular air duct 2, and the other end is connected to the main pipeline 61. Since coke dust is more likely to clog the connection between pipelines, placing the purge line 6 near the connection can improve the purge effect. Control valves are installed on the main line 61, the first purge line 62, the second purge line 63, and the third purge line 64.

[0033] In a preferred implementation of this embodiment, the high-temperature flue gas duct 5 is made of a high-temperature resistant material.

[0034] This utility model uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only intended to help understand the method and core concept of this utility model. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of this utility model. In summary, the contents of this specification should not be construed as limiting the present utility model.

Claims

1. A gas treatment device for a pre-storage chamber of a dry quenching furnace, comprising: A dry quenching furnace, a primary dust collector and a cooling system, a ring-shaped air duct connected to the interior of the dry quenching furnace is provided outside the dry quenching furnace pre-storage chamber, the inlet of the primary dust collector is connected to the ring-shaped air duct, the outlet of the primary dust collector is connected to the inlet of the cooling system, the outlet of the cooling system is connected to the cooling chamber of the dry quenching furnace, the ring-shaped air duct has a first middle bolt hole, the first middle bolt hole is used to input air, and it is characterized in that it also includes: a high-temperature flue gas duct, one end of the high-temperature flue gas duct is connected to and communicated with the top of the dry quenching furnace pre-storage chamber, and the other end is connected to and communicated with the inlet of the ring-shaped air duct and / or the primary dust collector.

2. The CDQ furnace pre-chamber gas treatment device according to claim 1, characterized in that: The high-temperature flue gas air duct includes a first air duct, a second air duct and a third air duct, one end of the first air duct is connected to and communicated with the top of the dry quenching furnace pre-storage chamber, one end of the second air duct is connected to and communicated with the end of the first air duct away from the dry quenching furnace, and the other end is connected to and communicated with the primary dust collector, one end of the third air duct is connected to and communicated with the end of the first air duct away from the dry quenching furnace, and the other end is connected to and communicated with the annular air duct.

3. The CDQ furnace pre-chamber gas treatment device according to claim 2, characterized in that: The second air duct and the third air duct are both provided with valves.

4. The CDQ furnace pre-chamber gas treatment device according to claim 3, characterized in that: The valves are all made of high temperature resistant materials.

5. The CDQ furnace pre-chamber gas treatment device according to claim 2, characterized in that: The annular air duct also has a second middle bolt hole, and the end of the third air duct away from the first air duct is connected to and communicated with the second middle bolt hole; the primary dust collector is provided with a high-temperature flue gas inlet, and the high-temperature flue gas inlet is connected to and communicated with the end of the second air duct away from the first air duct.

6. The CDQ furnace pre-chamber gas treatment device according to claim 2, characterized in that: It also includes an emergency relief device, which includes a working module and a connecting pipe. One end of the connecting pipe is connected to the top of the dry quenching furnace pre-storage chamber, and the other end of the connecting pipe is connected to the working module. It is characterized in that: the connecting pipe forms the first air duct.

7. The CDQ furnace pre-chamber gas treatment device according to claim 2, characterized in that: It also includes a purge pipeline, one end of which is connected to and communicated with the high-temperature flue gas duct, and the other end is used for introducing nitrogen.

8. The CDQ furnace pre-chamber gas treatment device according to claim 7, characterized in that: The high-temperature flue gas duct also includes a connecting duct, one end of the connecting duct is connected to the end of the first air duct away from the dry quenching furnace, and the other end has two interfaces, one interface is connected to and connected with the end of the second air duct away from the primary dust collector, and the other interface is connected to and connected with the end of the third air duct away from the annular air duct. The purge pipeline includes a main pipeline, a first purge pipeline, a second purge pipeline and a third purge pipeline. One end of the first purge pipeline is connected to and connected with the position of the connecting duct close to the first air duct, and the other end is connected to and connected with the main pipeline; one end of the second purge pipeline is connected to and connected with the position of the second air duct close to the primary dust collector, and the other end is connected to and connected with the main pipeline. One end of the third purge pipeline is connected to and connected with the position of the third air duct close to the annular air duct, and the other end is connected to the main pipeline.

9. The CDQ furnace pre-chamber gas treatment device according to claim 1, characterized in that: The high-temperature flue gas guide pipe is made of high-temperature resistant metal material.

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