Dry quenching system

Abstract

The embodiment of the utility model provides a dry quenching system. The dry quenching system comprises a dry quenching furnace, a primary dust removal device, a dry quenching boiler and a two-stage secondary dust removal device, the primary dust removal device is connected with the dry quenching furnace and the dry quenching boiler, and high-temperature circulating gas in the dry quenching furnace is fed into the dry quenching boiler after being subjected to primary dust removal; the two-stage secondary dust remover comprises a horizontal cyclone dust remover and a bag-type dust remover; the dry quenching boiler, the horizontal cyclone dust collector, the bag-type dust collector and the dry quenching furnace are sequentially connected in series, so that the horizontal cyclone dust collector and the bag-type dust collector sequentially perform secondary dust collection on circulating gas discharged by the dry quenching boiler, and then the circulating gas is circulated to the dry quenching furnace. The first-stage horizontal cyclone dust collector can be used for pretreating large-particle dust in circulating gas discharged by the dry quenching boiler, the pretreated circulating gas is subjected to dry filtration through the second-stage bag-type dust collector, and through two-stage dust removal, the dust removal efficiency of the second-stage dust collector is improved, the abrasion of a circulating fan is reduced, and the service life of the circulating fan is prolonged. And the operation stability of the dry quenching system is improved.

Description

Technical Field

[0001] This utility model relates to the field of dry quenching technology, and in particular to a dry quenching system. Background Technology

[0002] Traditional dry quenching coke systems mainly include dry quenching furnaces, primary gravity dust collectors, dry quenching coke boilers, secondary cyclone dust collectors, circulating fans, heat pipe heat exchangers, etc. Among them, the secondary dust collectors are mostly single-stage multi-tube cyclone dust collectors.

[0003] Single-stage multi-tube cyclone dust collectors use multiple cyclones arranged in parallel. In actual operation, the flow rate of dust-laden gas passing through multiple parallel cyclones is almost impossible to be evenly distributed, which can easily cause some cyclones to become blocked, uneven dust concentration distribution at the exhaust port, and low dust removal efficiency.

[0004] Furthermore, during the high-temperature coking process in horizontal heat recovery coke ovens, flocculent matter is typically generated, mainly composed of SiO2, Al2O3, and Fe2O3. This flocculent matter adheres to the surface of the coke. When the coke is transported by coke conveying equipment, this flocculent matter easily enters the circulating gas pipeline of the dry quenching system. Because the primary gravity dust collector cannot completely remove this flocculent matter, a large amount of it passes through the dry quenching boiler into the secondary dust collector, clogging the petal openings of the cyclone guide vanes in the cyclone dust collector. This prevents some cyclone guide vanes from utilizing the cyclone effect to separate dust and flocculent matter from the circulating gas, resulting in a decrease in the dust removal efficiency of the secondary dust collector. Ultimately, this leads to problems such as severely excessive dust concentration at the inlet of the circulating fan in the dry quenching system, severe wear of the circulating fan, and even the inability of the dry quenching system to operate normally. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a dry quenching system to improve the dust removal efficiency of the secondary dust collector, thereby enhancing the operational stability of the dry quenching system. The specific technical solution is as follows:

[0006] A dry quenching coke system includes: a dry quenching furnace, a primary dust removal device, a dry quenching coke boiler, and a two-stage secondary dust removal device; wherein, the primary dust removal device is connected to the dry quenching furnace and the dry quenching coke boiler, and is used to perform primary dust removal on the high-temperature circulating gas in the dry quenching furnace before sending it into the dry quenching coke boiler for heating to generate steam; the two-stage secondary dust removal device includes a horizontal cyclone dust collector and a bag filter dust collector; the dry quenching coke boiler, the horizontal cyclone dust collector, the bag filter dust collector, and the dry quenching furnace are connected in series so that the horizontal cyclone dust collector and the bag filter dust collector perform secondary dust removal on the circulating gas discharged from the dry quenching coke boiler before circulating it back to the dry quenching furnace.

[0007] In some embodiments, the two-stage secondary dust collector includes a spark catcher; the spark catcher is disposed between the outlet of the horizontal cyclone dust collector and the inlet of the bag filter dust collector.

[0008] In some embodiments, the bag filter includes multiple dust collection chambers connected in parallel, and each dust collection chamber is equipped with a manual shut-off valve at both its inlet and outlet.

[0009] In some embodiments, the dual-stage secondary dust collector includes: a connecting pipeline, a bypass, and a switching valve; the switching valve has a switchable first passage and a second passage, the first passage being connected to the outlet of the horizontal cyclone dust collector and the inlet of the bag filter dust collector via the connecting pipeline, and the second passage being connected to the outlet of the horizontal cyclone dust collector and the outlet of the bag filter dust collector via the bypass.

[0010] In some embodiments, the switching valve includes a first valve and a second valve; the connecting pipeline connects the outlet of the horizontal cyclone dust collector and the inlet of the bag filter dust collector, and the first valve is disposed in the connecting pipeline; the bypass connects the outlet of the horizontal cyclone dust collector and the outlet of the bag filter dust collector, and the second valve is disposed in the bypass.

[0011] In some embodiments, the horizontal cyclone dust collector includes a first horizontal cyclone dust collector cylinder and a second horizontal cyclone dust collector cylinder arranged side by side. The inlets of the first and second horizontal cyclone dust collector cylinders are both connected to the inlet of the horizontal cyclone dust collector. The connecting pipes, the bypass, and the switching valves are all in two sets. The first valve of the first set is located in the connecting pipe of the first set, and the second valve of the first set is located in the bypass of the first set. The connecting pipe of the first set connects the outlet of the first horizontal cyclone dust collector cylinder and the inlet of the bag filter, and the bypass of the first set connects the outlet of the first horizontal cyclone dust collector cylinder and the outlet of the bag filter. The first valve of the second set is located in the connecting pipe of the second set, and the second valve of the second set is located in the bypass of the second set. The connecting pipe of the second set connects the outlet of the second horizontal cyclone dust collector cylinder and the inlet of the bag filter, and the bypass of the second set connects the outlet of the second horizontal cyclone dust collector cylinder and the outlet of the bag filter.

[0012] In some embodiments, the dust collected by the bag filter has a particle size greater than 0.3 μm.

[0013] In some embodiments, it further includes: a coke charging dust removal pipe, the air inlet of which leads to the coke charging position, and the air outlet of which is connected to the inlet of the bag filter.

[0014] In some embodiments, the system further includes: a coke discharge dust removal pipe, wherein the air inlet of the coke discharge dust removal pipe is led to the coke discharge position, and the air outlet of the coke discharge dust removal pipe is connected to the inlet of the bag filter.

[0015] In some embodiments, the system further includes a circulating fan and a heat pipe heat exchanger, wherein the circulating fan and the heat pipe heat exchanger are sequentially disposed between the air outlet of the bag filter and the circulating air inlet of the dry quenching furnace.

[0016] The dry quenching system provided in this embodiment includes a dry quenching furnace, a primary dust removal device, a dry quenching boiler, and a two-stage secondary dust removal device. The primary dust removal device connects the dry quenching furnace and the dry quenching boiler, and is used to remove dust from the high-temperature circulating gas in the dry quenching furnace before sending it to the dry quenching boiler for heating and steam generation. The two-stage secondary dust removal device includes a horizontal cyclone dust collector and a bag filter. The dry quenching boiler, the horizontal cyclone dust collector, the bag filter, and the dry quenching furnace are connected in series so that the horizontal cyclone dust collector and the bag filter sequentially remove dust from the circulating gas discharged from the dry quenching boiler before circulating it back to the dry quenching furnace. The first-stage horizontal cyclone dust collector can pre-treat large particulate dust in the circulating gas discharged from the dry quenching coke boiler. The pre-treated circulating gas then undergoes dry filtration through the second-stage bag filter. This two-stage dust removal process improves the dust removal efficiency of the secondary dust collector, reduces the wear of the circulating fan by dust, and effectively enhances the operational stability of the dry quenching coke system.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the process flow of a dry quenching system provided in this application embodiment;

[0020] Figure 2 This is a schematic diagram of the plan layout of a dry quenching system provided in an embodiment of this application;

[0021] Figure 3 for Figure 1 Enlarged view of A in the middle;

[0022] Figure 4This is a schematic diagram of the main structure of a two-stage secondary dust removal device for a dry quenching system provided in an embodiment of this application;

[0023] Figure 5 for Figure 4 A schematic diagram of the structure of BB.

[0024] The attached figures are labeled as follows:

[0025] Dry quenching furnace 10, primary dust removal device 20, dry quenching coke boiler 30, dual-stage secondary dust removal device 40, horizontal cyclone dust collector 41, first horizontal cyclone dust collector 411, second horizontal cyclone dust collector 412, bag filter 42, spark catcher 43, connecting pipeline 44, bypass 45, switching valve 46, first valve 461, second valve 462, circulating fan 50, heat pipe heat exchanger 60. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art based on this application are within the protection scope of the present utility model.

[0027] In traditional dry quenching systems, single-stage multi-tube cyclone dust collectors employ a parallel cyclone sub-structure. While the inlet guide design can guide airflow, uneven gas flow distribution among the parallel cyclones during actual operation leads to blockage of some cyclones and significant differences in dust concentration distribution at the exhaust ports. This directly results in reduced dust removal efficiency, excessive dust concentration at the inlet of the circulating fan, accelerated fan blade wear, and ultimately affects the stability of continuous operation of the dry quenching system.

[0028] Figure 1 This is a schematic diagram of the process flow of a dry quenching system provided in an embodiment of this application. Figure 2 This is a schematic diagram of the plan layout of a dry quenching system provided in an embodiment of this application, as shown below. Figure 1 and Figure 2 As shown, a dry quenching coke system includes: a dry quenching furnace 10, a primary dust removal device 20, a dry quenching coke boiler 30, and a two-stage secondary dust removal device 40.

[0029] The primary dust removal device 20 is connected to the dry quenching furnace 10 and the dry quenching coke boiler 30. It is used to remove dust from the high-temperature circulating gas in the dry quenching furnace 10 before sending it to the dry quenching coke boiler 30 for heating to generate steam. The dual-stage secondary dust collector 40 includes a horizontal cyclone dust collector 41 and a bag filter dust collector 42. The dry quenching coke boiler 30, the horizontal cyclone dust collector 41, the bag filter dust collector 42 and the dry quenching furnace 10 are connected in series so that the horizontal cyclone dust collector 41 and the bag filter dust collector 42 remove dust from the circulating gas discharged from the dry quenching coke boiler 30 in sequence before circulating it to the dry quenching furnace 10.

[0030] The working process and principle of the dry quenching system in this application are as follows:

[0031] The primary dust removal device 20 connects the dry quenching furnace 10 and the dry quenching coke boiler 30, and performs preliminary dust removal on the high-temperature circulating gas in the dry quenching furnace 10. The dust-removed gas enters the dry quenching coke boiler 30 for heating to generate steam. The secondary dust removal device 40 consists of a horizontal cyclone dust collector 41 and a bag filter dust collector 42, connected in series between the outlet of the dry quenching coke boiler 30 and the inlet of the dry quenching furnace 10.

[0032] The circulating gas discharged from the dry quenching coke boiler 30 first enters the horizontal cyclone dust collector 41. The horizontal cyclone dust collector 41 uses centrifugal force to separate larger dust particles. The gas rotates horizontally, and dust particles are thrown outwards and settle under centrifugal force. The circulating gas treated by the horizontal cyclone dust collector 41 then enters the bag filter dust collector 42 for deep filtration. The bag filter dust collector 42 captures fine dust particles through the surface of the filter bags. The two-stage dust collectors work together to form a graded dust removal mechanism.

[0033] The dry quenching system also includes a circulating fan 50 and a heat pipe heat exchanger 60, which are sequentially arranged between the outlet of the bag filter 42 and the inlet of the dry quenching furnace 10. The circulating gas, after being subjected to staged dust removal by the dual-stage secondary dust removal device 40, passes sequentially through the circulating fan 50 and the heat pipe heat exchanger 60 before circulating to the dry quenching furnace 10.

[0034] The technical solution provided by the embodiments of this application allows the first-stage horizontal cyclone dust collector 41 to pre-treat large particulate dust in the circulating gas discharged from the dry quenching boiler 30. The pre-treated circulating gas then undergoes dry filtration through the second-stage bag filter 42. The filter material intercepts fine dust, allowing the dust-laden circulating gas to pass through two stages of dust removal, thereby improving the dust removal efficiency of the secondary dust collector, reducing the wear of the circulating fan 50 by dust, and effectively improving the operational stability of the dry quenching system.

[0035] The horizontal cyclone dust collector 41 can be a centrifugal dust collection device placed horizontally. Specifically, it can be implemented by using a structure with an internal spiral guide plate. After the circulating gas enters the horizontal cyclone dust collector 41 tangentially from top to bottom, the rotational motion generates centrifugal force, which separates the particulate matter and collects it in the bottom ash hopper.

[0036] The baghouse dust collector 42 is a filtration-type dust collection device composed of fiber filter bags. It achieves gas-solid separation by forming a filter layer on the surface of the filter bags, and can capture fine particles with a diameter greater than 0.3 μm. The baghouse dust collector 42 can collect dust particles larger than 0.3 μm, and its dust removal efficiency can reach over 99%, with the dust concentration in the treated circulating gas reaching <5 mg / m³. 3 This helps protect the circulating fan 50 and maintain the operational stability of the dry quenching system.

[0037] The dual-stage secondary dust collector 40 includes a horizontal cyclone dust collector 41 and a bag filter dust collector 42; the dry quenching coke boiler 30, the horizontal cyclone dust collector 41, the bag filter dust collector 42 and the dry quenching furnace 10 are connected in series, meaning that the equipment is connected in sequence according to the flow direction of the circulating gas.

[0038] Figure 3 for Figure 1 Enlarged view of A in the middle, Figure 4 This is a front view schematic diagram of a two-stage secondary dust removal device for a dry quenching system provided in an embodiment of this application. Figure 5 for Figure 4 A structural diagram of BB, as shown below. Figure 3 , Figure 4 and Figure 5 As shown, the dual-stage secondary dust collector 40 includes a spark catcher 43; the spark catcher 43 is disposed between the outlet of the horizontal cyclone dust collector 41 and the inlet of the bag filter dust collector 42.

[0039] Even after passing through the horizontal cyclone dust collector 41, the circulating gas may still carry high-temperature sparks or incompletely separated hot particles. If this gas directly enters the bag filter 42, the high-temperature sparks may ignite the filter bags or cause damage, affecting dust removal efficiency and system operational stability. The technical solution provided in this application is that the spark arrester 43 can treat the high-temperature circulating gas entering the bag filter 42 to cool the hot coke powder in the gas, eliminate sparks, and reduce the probability of the hot coke powder or sparks burning the filter bags in the bag filter 42.

[0040] The spark catcher 43 can adopt a conventional structure. The embodiments of this application are not limited to this one, as long as they meet the purpose of this application.

[0041] When the bag filter 42 is in operation, if maintenance or replacement of dust collection components is required, it is impossible to isolate a specific dust collection unit, which would force the entire dust collection system to shut down, thereby affecting the continuous operation stability of the dry quenching system. Therefore, in some embodiments of this application, the bag filter 42 includes multiple parallel dust collection chambers, each with a manual shut-off valve at both its inlet and outlet.

[0042] Multiple parallel dust collector chambers employ an independent airflow channel design. Each chamber has a manually operated shut-off valve at both its inlet and outlet, such as a manual butterfly valve or a gate valve, to independently cut off the airflow path. The number of chambers can be two, four, or more, depending on the system's processing capacity.

[0043] Specifically, when a dust collector needs maintenance, the operator can close the manual shut-off valves at the inlet and outlet of that collector. At this time, the airflow channels of the other dust collectors will remain open through the valves.

[0044] The technical solution provided by the embodiments of this application allows for the manual shut-off valves of the inlet and outlet of the faulty dust collector 42 to be closed and switched individually when a certain dust collector box in the bag filter 42 malfunctions, so as to facilitate online cleaning and offline maintenance.

[0045] In some embodiments, the dual-stage secondary dust collector 40 includes: a connecting pipe 44, a bypass 45, and a switching valve 46; the switching valve 46 has a switchable first passage and a second passage, the first passage being connected to the outlet of the horizontal cyclone dust collector 41 and the inlet of the bag filter 42 via the connecting pipe 44, and the second passage being connected to the outlet of the horizontal cyclone dust collector 41 and the outlet of the bag filter 42 via the bypass 45.

[0046] The technical solution provided by the embodiments of this application allows for switching the second passage via the switching valve 46 during the drying process of the dry quenching furnace 10 or when the dry quenching system is operating at low load. This allows the circulating gas from the horizontal cyclone dust collector 41 to bypass the bag filter 42, enabling the horizontal cyclone dust collector 41 to operate independently based on actual production conditions. This facilitates the maintenance of the bag filter 42 and reduces the impact of moisture in the dry quenching system on the filter bag life and dust removal efficiency of the bag filter 42 during the drying process.

[0047] The switching valve 46 can be a three-way valve, which can be controlled by electric or pneumatic means to achieve rapid switching.

[0048] The switching valve 46 can also be composed of multiple valves. For example, the switching valve 46 includes a first valve 461 and a second valve 462; the connecting pipe 44 connects the outlet of the horizontal cyclone dust collector 41 and the inlet of the bag dust collector 42, and the first valve 461 is disposed in the connecting pipe 44; the bypass 45 connects the outlet of the horizontal cyclone dust collector 41 and the outlet of the bag dust collector 42, and the second valve 462 is disposed in the bypass 45.

[0049] The first valve 461 and the second valve 462 are independently controlled, corresponding to the connecting pipe 44 and the bypass 45, respectively. The opening state of the first valve 461 only controls the airflow through the connecting pipe 44, and the opening state of the second valve 462 only controls the airflow through the bypass 45. The first valve 461 and the second valve 462 can be pneumatically or electrically operated.

[0050] The technical solution provided by the embodiments of this application allows for simultaneous dust removal in two stages: the horizontal cyclone dust collector 41 and the bag filter 42. Conversely, opening the first valve 461 and closing the second valve 462 allows for simultaneous dust removal in the second stage, while closing the first valve 461 allows for single-stage dust removal in the horizontal cyclone dust collector 41. This design is simple in structure and easy to operate.

[0051] Specifically, the horizontal cyclone dust collector 41 includes a first horizontal cyclone dust collector cylinder 411 and a second horizontal cyclone dust collector cylinder 412 arranged side by side. The inlets of the first horizontal cyclone dust collector cylinder 411 and the second horizontal cyclone dust collector cylinder 412 are both connected to the inlet of the horizontal cyclone dust collector 41. The connecting pipe 44, the bypass 45, and the switching valve 46 are all in two sets. The first valve 461 of the first set is located in the connecting pipe 44 of the first set, and the second valve 462 of the first set is located in the bypass 45 of the first set. The connecting pipe 44 of the first set is connected to the first horizontal cyclone dust collector cylinder. The outlet of the dust collector 411 and the inlet of the bag filter 42 are connected by a bypass 45 of the first group; the first valve 461 of the second group is located in the connecting pipe 44 of the second group, and the second valve 462 of the second group is located in the bypass 45 of the second group; the connecting pipe 44 of the second group is connected to the outlet of the second horizontal cyclone dust collector 412 and the inlet of the bag filter 42, and the bypass 45 of the second group is connected to the outlet of the second horizontal cyclone dust collector 412 and the outlet of the bag filter 42.

[0052] The technical solution provided in the embodiments of this application is that the horizontal cyclone dust collector 41 has one inlet and two outlets (the outlet of the first horizontal cyclone dust collector 411 and the outlet of the second horizontal cyclone dust collector 412), and the first horizontal cyclone dust collector 411 and the second horizontal cyclone dust collector 412 are independent of each other.

[0053] Under normal operating conditions, the first horizontal cyclone dust collector 411 and the second horizontal cyclone dust collector 412 work simultaneously. The circulating gas is diverted through the total inlet of the horizontal cyclone dust collector 41 into the first horizontal cyclone dust collector 411 and the second horizontal cyclone dust collector 412 to complete the primary dust removal, and then enters the bag filter 42 through their respective connecting pipes 44.

[0054] When the first horizontal cyclone dust collector 411 malfunctions, the first valve 461 and the second valve 462 of the first group can be closed, allowing the second horizontal cyclone dust collector 412 to work independently.

[0055] When the second horizontal cyclone dust collector 412 malfunctions, the first valve 461 and the second valve 462 of the second group can be closed, allowing the first horizontal cyclone dust collector 411 to work independently.

[0056] Through the above technical solution, the embodiments of this application improve the operational stability of the two-stage secondary dust removal device 40. Even if one of the horizontal cyclone dust collectors fails, the system can still continue to operate, avoiding the problem of the entire system shutting down due to a single dust collector failure.

[0057] In conventional dry quenching technology, after coke is loaded at the charging position, the coke can is transported to the hoisting shaft. Driven by the hoisting shaft, the coke can enter from the top of the dry quenching furnace 10, passes through the pre-storage chamber to the cooling chamber, where it exchanges heat with inert gas to form a high-temperature circulating gas, cooling the coke to below 200°C. At the discharge position, the coke is unloaded onto a belt conveyor via a discharge device and then sent to the coke screening and storage system.

[0058] In conventional technology, a bag filter 42 is set up independently at the coke loading position, and an operating platform is required for both the bag filter 42 and the multi-tube cyclone dust collector (secondary dust collector) set up at the coke loading position, resulting in a large footprint.

[0059] In this embodiment, the solution further includes a coking dust removal duct, the air inlet of which leads to the coking position, and the air outlet of which is connected to the inlet of the bag filter 42. The technical solution provided by this application also allows the bag filter 42 to purify the air at the coking position. The bag filter 42 and the horizontal cyclone dust collector 41 are integrated, and a single operating platform can be set up around the integrated bag filter 42 and horizontal cyclone dust collector 41. The two can share the same operating platform, which is beneficial for optimizing the layout and reduces the floor space compared to traditional multi-tube cyclone dust collector and bag filter 42 layouts.

[0060] In conventional technology, a bag filter 42 is set up independently at the coke discharge position, and an operating platform is required for both the bag filter 42 and the multi-tube cyclone dust collector (secondary dust collector) set up at the coke discharge position, resulting in a large footprint.

[0061] In this embodiment, the solution further includes a coke discharge dust removal pipe, the air inlet of which leads to the coke discharge location, and the air outlet of which is connected to the inlet of the bag filter 42. The technical solution provided by this application also allows the bag filter 42 to purify the air at the coke discharge location. The bag filter 42 and the horizontal cyclone dust collector 41 are integrated, and a single operating platform can be set up around the integrated bag filter 42 and horizontal cyclone dust collector 41. The two can share the same operating platform, which is beneficial for optimizing the layout and reduces the floor space compared to traditional multi-tube cyclone dust collector and bag filter 42 layouts.

[0062] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A dry quenching system, characterized in that, include: Dry quenching furnace (10), primary dust removal device (20), dry quenching coke boiler (30), and dual-stage secondary dust removal device (40); among which, The primary dust removal device (20) is connected to the dry quenching furnace (10) and the dry quenching coke boiler (30). It is used to remove dust from the high-temperature circulating gas in the dry quenching furnace (10) and then send it into the dry quenching coke boiler (30) to heat and generate steam. The dual-stage secondary dust collector (40) includes a horizontal cyclone dust collector (41) and a bag filter dust collector (42); The dry quenching coke boiler (30), the horizontal cyclone dust collector (41), the bag filter (42) and the dry quenching furnace (10) are connected in series so that the horizontal cyclone dust collector (41) and the bag filter (42) sequentially perform secondary dust removal on the circulating gas discharged from the dry quenching coke boiler (30) and then circulate it to the dry quenching furnace (10).

2. The dry quenching system according to claim 1, characterized in that, The dual-stage secondary dust collector (40) includes a spark catcher (43); The spark catcher (43) is located between the outlet of the horizontal cyclone dust collector (41) and the inlet of the bag dust collector (42).

3. The dry quenching system according to claim 1, characterized in that, The bag filter (42) includes multiple dust collection chambers connected in parallel, and each dust collection chamber is equipped with a manual shut-off valve at both the inlet and outlet.

4. The dry quenching system according to claim 1, characterized in that, The dual-stage secondary dust collector (40) includes: a connecting pipeline (44), a bypass (45), and a switching valve (46); The switching valve (46) has a switchable first passage and a second passage. The first passage is connected to the outlet of the horizontal cyclone dust collector (41) and the inlet of the bag dust collector (42) via the connecting pipe (44). The second passage is connected to the outlet of the horizontal cyclone dust collector (41) and the outlet of the bag dust collector (42) via the bypass (45).

5. The dry quenching system according to claim 4, characterized in that, The switching valve (46) includes a first valve (461) and a second valve (462); The connecting pipe (44) connects the outlet of the horizontal cyclone dust collector (41) and the inlet of the bag dust collector (42), and the first valve (461) is installed in the connecting pipe (44); The bypass (45) connects the outlet of the horizontal cyclone dust collector (41) and the outlet of the bag dust collector (42), and the second valve (462) is located in the bypass (45).

6. The dry quenching system according to claim 5, characterized in that, The horizontal cyclone dust collector (41) includes a first horizontal cyclone dust collector cylinder (411) and a second horizontal cyclone dust collector cylinder (412) arranged side by side. The inlet of the first horizontal cyclone dust collector cylinder (411) and the inlet of the second horizontal cyclone dust collector cylinder (412) are both connected to the inlet of the horizontal cyclone dust collector (41). The connecting pipeline (44), the bypass (45), and the switching valve (46) are all in two sets; The first valve (461) of the first group is located in the connecting pipeline (44) of the first group, and the second valve (462) of the first group is located in the bypass (45) of the first group; The first group of connecting pipes (44) connects the outlet of the first horizontal cyclone dust collector (411) and the inlet of the bag filter (42), and the first group of bypass pipes (45) connects the outlet of the first horizontal cyclone dust collector (411) and the outlet of the bag filter (42). The first valve (461) of the second group is located in the connecting pipeline (44) of the second group, and the second valve (462) of the second group is located in the bypass (45) of the second group; The second set of connecting pipes (44) connects the outlet of the second horizontal cyclone dust collector (412) and the inlet of the bag filter (42), and the second set of bypass pipes (45) connects the outlet of the second horizontal cyclone dust collector (412) and the outlet of the bag filter (42).

7. The dry quenching system according to claim 1, characterized in that, The dust collector (42) can collect dust particles with a diameter greater than 0.3 μm.

8. The dry quenching system according to claim 1, characterized in that, Also includes: The coke-loading dust removal pipe has its air inlet leading to the coke-loading position, and its air outlet is connected to the inlet of the bag filter (42).

9. The dry quenching system according to claim 1, characterized in that, Also includes: The coke discharge and dust removal pipeline has an air inlet that leads to the coke discharge position and an air outlet that is connected to the inlet of the bag filter (42).

10. The dry quenching system according to claim 1, characterized in that, Also includes: A circulating fan (50) and a heat pipe heat exchanger (60) are arranged sequentially between the air outlet of the bag filter (42) and the circulating air inlet of the dry quenching furnace (10).

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