Annular multi-cylinder cyclone secondary dust removal device and dry quenching system

Abstract

The embodiment of the utility model provides an annular multi-cylinder cyclone secondary dust removal device and a dry quenching system. The annular multi-cylinder cyclone secondary dust removal device comprises a central main pipe, a main ash bucket, a plurality of cyclone components and an upper air chamber, when the annular multi-cylinder cyclone secondary dust removal device is applied to a coke dry quenching system, circulating gas led out from a coke dry quenching boiler enters the central main pipe from a tangential gas inlet of the central main pipe along the tangential direction and downwards inclined by a certain angle, and quickly centrifugally moves downwards in a spiral rotating track; and the circulating gas passes through an air outlet in the side wall of the upper part of the central main pipe, enters a plurality of cyclone cylinders on the periphery of the central main pipe, and performs rapid centrifugal movement in a spiral rotating track again. In the embodiment of the scheme, the annular multi-cylinder cyclone secondary dust removal device is not provided with a cyclone guider, so that the annular multi-cylinder cyclone secondary dust removal device is not easily blocked by floccules, and the operation stability of the annular multi-cylinder cyclone secondary dust removal device and the dry quenching system is improved.

Description

Annular multi-cylinder cyclone secondary dust removal device and dry quenching system Technical Field

[0001] This utility model relates to the field of dry quenching technology, and in particular to a ring-shaped multi-cylinder cyclone secondary dust removal device and a dry quenching system. Background Technology

[0002] During the high-temperature coking process in a horizontal heat recovery coke oven, flocculent matter is usually generated, mainly composed of SiO2, Al2O3, Fe2O3, etc. These flocculent matter adheres to the surface of the coke. When the coke is transported by the coke transport equipment, the flocculent matter easily enters the circulating gas pipeline of the dry quenching system. Since the primary gravity dust collector cannot completely remove these flocculent matter, a large amount of flocculent matter will pass through the dry quenching boiler and enter the secondary dust collector.

[0003] In traditional dry quenching systems, secondary dust collectors often employ a multi-tube cyclone separator structure. This separator mainly consists of a single cyclone separator, a fixed plate (used to fix the cyclone element and the air guide pipe respectively), an outer shell, a lower ash hopper, and inlet and outlet reducing pipes. The single cyclone separator is composed of a cyclone element, an air guide pipe, and a guide vane.

[0004] The consequences of this arrangement are quite serious. The flocculent material entering the secondary dust collector can easily clog the cyclone guide, causing some guides to weaken or lose their function. The secondary dust collector cannot effectively separate the dust and flocculent material in the circulating gas, resulting in excessive dust concentration at the inlet of the circulating fan after the secondary dust collector. The circulating fan is prone to severe wear and tear, and may even cause the dry quenching system to malfunction, seriously affecting the operational stability of the dry quenching system. Summary of the Invention

[0005] The purpose of this utility model embodiment is to provide a ring-shaped multi-cylinder cyclone secondary dust removal device and a dry quenching system, thereby improving the operational stability of the ring-shaped multi-cylinder cyclone secondary dust removal device and the dry quenching system. The specific technical solution is as follows:

[0006] A ring-shaped multi-cylinder cyclone secondary dust removal device includes:

[0007] The central header has a tangential air inlet on its side wall, which is used to introduce circulating gas into the central header and make the circulating gas rotate downward in a spiral motion for preliminary centrifugal dust removal.

[0008] The main ash hopper is connected to the outlet at the lower part of the central header pipe;

[0009] Multiple cyclone components surround the outside of the central header. Each cyclone component includes a cyclone tube and a hopper. The air inlet on the side wall of each cyclone tube is connected to the air outlet on the upper side wall of the central header, so that the circulating gas in the central header enters the cyclone tube from the upper part of the central header and moves in a spiral rotation trajectory for centrifugal dust removal. In each cyclone component, the lower part of the cyclone tube is connected to the upper part of the hopper, and the outlet at the lower part of each hopper is connected to the inlet on the side wall of the total ash hopper.

[0010] The upper air chamber is located above the central header. The air inlets on the side walls of the upper air chamber are connected to the air outlets of each cyclone. A dust removal air outlet is provided on the top of the upper air chamber.

[0011] In some embodiments, each cyclone includes: a cylinder for centrifugal dust removal of circulating gas in a spiral rotational motion and a lint-proof grid;

[0012] The anti-flocculent grid is installed inside the cylinder.

[0013] In some embodiments, the anti-flocculent grid includes a plurality of first anti-flocculent rods;

[0014] Multiple first anti-fluff rods are arranged inside the cylinder body around the axis of the cylinder body. The first end of each first anti-fluff rod is connected to the inner wall of the cylinder body, and the second end of each first anti-fluff rod is inclined towards the air inlet side of the cylinder body and in the opposite direction to the spiral rotation of the circulating gas.

[0015] In some embodiments, the anti-flocculent grille includes a plurality of second anti-flocculent rods;

[0016] Multiple second anti-fluff rods are arranged inside the cylinder body around the axis of the cylinder body. The first end of each second anti-fluff rod is connected to the inner wall of the cylinder body, and the second end of each second anti-fluff rod is inclined away from the air inlet side of the cylinder body and in the opposite direction to the spiral rotation of the circulating gas.

[0017] In some embodiments, a plurality of first anti-fluffing rods are arranged in layers at intervals along the height direction of the cylinder; and / or,

[0018] Along the height direction of the cylinder, multiple second anti-fluff rods are arranged in layers at intervals.

[0019] In some embodiments, a plurality of first anti-fluff rods and a plurality of second anti-fluff rods of each layer are arranged in a staggered manner in the vertical direction;

[0020] The second ends of the multiple first anti-flocking rods on each floor intersect at least in pairs, and the second ends of the multiple second anti-flocking rods on each floor intersect at least in pairs.

[0021] In some embodiments, each cyclone assembly includes an airflow regulating device disposed between the air inlet of the cyclone tube and the air outlet on the upper sidewall of the central header tube.

[0022] In some embodiments, each cyclone assembly includes an inspection valve and a gate valve;

[0023] The maintenance valve is located between the air inlet on the side wall of the upper air chamber and the air outlet of the cyclone.

[0024] The gate valve is located between the outlet at the bottom of the hopper and the inlet on the side wall of the main ash hopper.

[0025] In some embodiments, each hopper and the central header are at least partially at the same height.

[0026] A dry quenching system, comprising:

[0027] Dry quenching furnace;

[0028] Dry quenching coke boiler;

[0029] A primary dust collector is used to remove dust from the high-temperature circulating gas of the dry quenching furnace and send it to the dry quenching coke boiler for heating to generate steam.

[0030] The aforementioned annular multi-cylinder cyclone secondary dust removal device is used to send the circulating gas discharged from the dry quenching coke boiler into the central header of the annular multi-cylinder cyclone secondary dust removal device at an angle downward through the tangential air inlet, so that the annular multi-cylinder cyclone secondary dust removal device can perform secondary dust removal.

[0031] A circulating fan is used to circulate the circulating gas from the secondary dust removal process through a heat pipe heat exchanger to the dry quenching furnace.

[0032] In some embodiments, the inner wall of the central header pipe facing the tangential air inlet is provided with a first wear-resistant ceramic plate; the circulating fan includes an air inlet channel, a rotary channel and an air outlet channel, the air inlet channel, the rotary channel and the air outlet channel are connected sequentially, the air inlet channel is connected to the air outlet of the annular multi-cylinder cyclone secondary dust removal device, the air outlet channel is connected to the inlet of the circulating gas through the heat pipe heat exchanger, and at least a portion of the inner wall of the rotary channel is provided with a second wear-resistant ceramic plate.

[0033] The annular multi-cylinder cyclone secondary dust removal device and dry quenching system provided in this application embodiment include a central header, a main ash hopper, multiple cyclone components and an upper air chamber. When the annular multi-cylinder cyclone secondary dust removal device is applied to the dry quenching system, the circulating gas drawn from the dry quenching boiler enters the central header from the tangential air inlet, tangentially and at a certain downward angle. The circulating gas containing flocculent matter and dust enters the central header at a certain speed and undergoes rapid centrifugal motion in a spiral rotation trajectory downwards. Large dust particles in the circulating gas fall to the total ash hopper. The circulating gas then passes through the air outlet on the upper side wall of the central header and enters multiple cyclones around the central header, where it again undergoes rapid centrifugal motion in a spiral rotation trajectory. Through the cyclone action of multiple cyclones, the centrifugal force generated by the rotation of the airflow pushes the heavier particles to the outer wall of the cyclone, thus sinking to the hopper and falling from the hopper to the total ash hopper. Meanwhile, the lighter particles and flocculent matter in the circulating gas are carried to the central area of ​​the cyclone and discharged from the air outlet of the cyclone into the upper air chamber. In the embodiments of this solution, the annular multi-cylinder cyclone secondary dust removal device does not have a cyclone guide, so it is not easily blocked by flocculent material, thereby improving the operational stability of the annular multi-cylinder cyclone secondary dust removal device and the dry quenching system.

[0034] 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

[0035] 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.

[0036] Figure 1 is a front view schematic diagram of a ring-shaped multi-cylinder cyclone secondary dust removal device provided in an embodiment of this application;

[0037] Figure 2 is a schematic diagram of the structure of AA in Figure 1;

[0038] Figure 3 is an enlarged view of B in Figure 1;

[0039] Figure 4 is a schematic diagram of the structure of CC in Figure 3;

[0040] Figure 5 is a schematic diagram of the process flow of a dry quenching system provided in an embodiment of this application;

[0041] Figure 6 is a schematic plan view of a dry quenching system provided in an embodiment of this application;

[0042] Figure 7 is a front view schematic diagram of the circulating fan of a dry quenching system provided in an embodiment of this application;

[0043] Figure 8 is a schematic diagram of the structure in direction D in Figure 7.

[0044] The attached figures are labeled as follows:

[0045] Central main pipe 10, tangential air inlet 11, tangential air inlet pipe 12, main ash hopper 20, multiple cyclone components 30, cyclone cylinder 31, cylinder body 311, anti-fluff grid 312, first anti-fluff rod 3121, second anti-fluff rod 3122, hopper 32, air volume regulating device 33, maintenance valve 34, slide valve 35, upper air chamber 40, airflow distribution pipe 50;

[0046] Dry quenching furnace 100, dry quenching coke boiler 200, primary dust collector 300, annular multi-cylinder cyclone secondary dust collector 400, circulating fan 500, air inlet channel 510, rotary channel 520, air outlet channel 530, second wear-resistant ceramic plate 540, motor 550, heat pipe heat exchanger 600.

[0047] The direction of the spiral rotation is R. Detailed Implementation

[0048] 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.

[0049] In traditional multi-tube cyclone separators, the flocculent material carried by the circulating gas tends to adhere to the guide surface due to the geometry of the guide, causing blockage. This blockage directly results in some cyclones losing their dust separation function, allowing a large amount of uncaptured dust to enter the circulating fan with the airflow, potentially damaging the fan and severely impacting the operational stability of the dry quenching system.

[0050] Figure 1 is a front view of a ring-shaped multi-cylinder cyclone secondary dust removal device 400 provided in an embodiment of this application, and Figure 2 is a structural schematic diagram of AA in Figure 1. As shown in Figures 1 and 2, an embodiment of this application provides a ring-shaped multi-cylinder cyclone secondary dust removal device 400, including a central header 10, a total ash hopper 20, multiple cyclone components 30 and an upper air chamber 40.

[0051] The central header 10 has a tangential air inlet 11 on its side wall for introducing circulating gas into the central header 10 and causing the circulating gas to rotate downwards in a spiral motion for initial centrifugal dust removal. The main ash hopper 20 is connected to the outlet at the lower part of the central header 10. Multiple cyclone assemblies 30 surround the outside of the central header 10. Each cyclone assembly 30 includes a cyclone cylinder 31 and a hopper 32. The air inlet on the side wall of each cyclone cylinder 31 is connected to the air outlet on the upper side wall of the central header 10, so that the air inside the central header 10... The circulating gas enters the cyclone 31 from the upper part of the central header 10 and moves in a spiral rotation trajectory for centrifugal dust removal again. In each cyclone assembly 30, the lower part of the cyclone 31 is connected to the upper part of the hopper 32, and the outlet of the lower part of each hopper 32 is connected to the inlet of the side wall of the total ash hopper 20. The upper air chamber 40 is located above the central header 10, and the air inlet of the side wall of the upper air chamber 40 is connected to the air outlet of each cyclone 31. The top of the upper air chamber 40 is provided with a dust removal air outlet.

[0052] The technical solution provided in this application embodiment, when the annular multi-cylinder cyclone secondary dust removal device 400 is applied to the dry quenching system, the circulating gas drawn from the dry quenching boiler 200 enters the central header 10 from the tangential inlet 11 of the central header 10, tangentially and downward at a certain angle. The circulating gas containing flocculent matter and dust enters the central header 10 at a certain speed and undergoes rapid centrifugal motion in a spiral rotation trajectory downwards. Large dust particles in the circulating gas fall into the total ash hopper 20; the circulating gas then passes through the central header... The air outlet on the upper side wall of pipe 10 enters multiple cyclone tubes 31 around the central main pipe 10, where it undergoes rapid centrifugal motion in a spiral rotation trajectory. Through the cyclone action of the multiple cyclone tubes 31, the centrifugal force generated by the rotation of the airflow pushes heavier particles against the outer wall of the cyclone tubes 31, causing them to sink to the hopper 32 and fall into the total ash hopper 20. Meanwhile, lighter particles and flocculent matter in the circulating gas are carried to the central area of ​​the cyclone tubes 31 and enter the upper air chamber 40 through the outlet of the cyclone tubes 31 for discharge. In this embodiment, the annular multi-cylinder cyclone secondary dust removal device 400 does not have cyclone guides, thus it is less prone to clogging by flocculent matter, thereby improving the operational stability of the annular multi-cylinder cyclone secondary dust removal device 400 and the dry quenching system.

[0053] The central header pipe 10 has a cylindrical structure with a tangential air inlet 11 on its upper side wall. The axis of the tangential air inlet 11 forms a certain angle with the axis of the central header pipe 10, causing the incoming airflow to form a downward spiral motion. The lower outlet of the central header pipe 10 is connected to the top of the main ash hopper 20.

[0054] The tangential air inlet 11 on the side wall of the central header 10 refers to the gas inlet located on the side of the central header 10. Specifically, a tangential air inlet pipe 12 can be connected to the tangential air inlet 11 on the side wall of the central header 10, so that the circulating gas enters the central header 10 in a tangential manner and forms a downward spiral rotation motion, using centrifugal force to initially separate large dust particles into the total ash hopper 20.

[0055] Multiple cyclone components 30 are evenly arranged around the outer periphery of the central header 10. Each cyclone 31 is cylindrical, with an air inlet on its lower side wall. The air inlet of each cyclone 31 is connected to the corresponding air outlet on the upper side wall of the central header 10 via its own connecting pipe. An air outlet is located at the top of each cyclone 31, and its bottom is connected to a hopper 32. The hopper 32 is funnel-shaped, and its lower outlet is connected to the inlet on the side wall of the main ash hopper 20.

[0056] The upper air chamber 40 is a cylindrical structure located directly above the central header 10. Multiple air inlets are opened on the side walls of the upper air chamber 40, each connecting to the air outlet of one of the cyclones 31. A dust removal air outlet is located at the center of the top of the upper air chamber 40.

[0057] Typically, the dust collector outlet is used to connect to the circulating fan 500. For a dual-inlet circulating fan 500, the dust collector outlet is connected to the circulating fan 500 via an airflow distribution pipe 50. The airflow distribution pipe 50 has one inlet and two outlets. The inlet of the airflow distribution pipe 50 is connected to the dust collector outlet, and the two outlets of the airflow distribution pipe 50 are connected one-to-one to the two inlets of the circulating fan 500.

[0058] If the flocculent material discharged from the annular multi-cylinder cyclone secondary dust removal device 400 enters the circulating fan 500 and the heat pipe heat exchanger 600, it can easily affect the operational stability of the circulating fan 500 and the heat pipe heat exchanger 600. Figure 3 is an enlarged view of B in Figure 1, and Figure 4 is a structural schematic diagram of CC in Figure 3. As shown in Figures 3 and 4, in some embodiments of this application, each cyclone 31 includes a cylinder 311 for centrifugal dust removal of circulating gas in a spiral rotation and an anti-flocculent grid 312; the anti-flocculent grid 312 is disposed inside the cylinder 311.

[0059] The anti-flocculation grid 312 is composed of multiple anti-flocculation rods, for example, the anti-flocculation rods form a mesh interception structure inside the cylinder 311. The technical solution provided in this application embodiment allows flocculated materials in the circulating gas to be effectively intercepted by the anti-flocculation grid 312 of the cyclone separator 31, reducing the risk of flocculated materials entering the circulating fan 500 and heat pipe heat exchanger 600, and improving the operational stability of the dry quenching system.

[0060] To further improve the effect of the anti-flocculent grid 312 in intercepting flocculated matter in the circulating gas, in some embodiments, the anti-flocculent grid 312 includes a plurality of first anti-flocculent rods 3121; the plurality of first anti-flocculent rods 3121 are arranged around the axis of the cylinder 311 inside the cylinder 311, the first end of each first anti-flocculent rod 3121 is connected to the inner wall of the cylinder 311, and the second end of each first anti-flocculent rod 3121 is inclined toward the air inlet side of the cylinder 311 and in the opposite direction of the spiral rotation R of the circulating gas.

[0061] The angle at which the second end of the first anti-flock rod 3121 is tilted toward the air inlet side of the cylinder 311 can be set from 30° to 60°, for example, 45°.

[0062] The second end of the first anti-flocculent rod 3121 is inclined in the opposite direction of the spiral rotation of the circulating gas, R, which means that it is inclined in the opposite direction of the spiral rotation of the circulating gas, relative to the angle between the first anti-flocculent rod 3121 and the inner wall of the cylinder 311.

[0063] The technical solution provided in this application embodiment is that when the circulating gas moves from the air inlet side of the cylinder 311 to the air outlet side of the cylinder 311, and rapidly centrifugally moves along the spiral rotation direction R inside the cylinder 311, the flocculent matter in the circulating gas is easily intercepted by the first anti-flocculent rod 3121, which is inclined towards the air inlet side of the cylinder 311 and in the opposite direction to the spiral rotation direction R of the circulating gas, thereby improving the effect of the anti-flocculent grid 312 in intercepting the flocculent matter.

[0064] When the circulating gas carrying flocculent material passes through the cylinder 311 along a spiral trajectory, the first anti-flocculent rod 3121 intercepts the flocculent material upon initial contact. Some of the heavier flocculent material that is not captured continues to move towards the outlet side under inertia. Due to gravity, these flocculent materials begin to settle after passing the first anti-flocculent rod 3121. Since the second end of the first anti-flocculent rod 3121 is inclined towards the inlet side of the cylinder 311, it is not easily captured by the first anti-flocculent rod 3121.

[0065] In a specific implementation, the anti-fluff grid 312 further includes a plurality of second anti-fluff rods 3122; the plurality of second anti-fluff rods 3122 are arranged around the axis of the cylinder 311 inside the cylinder 311, the first end of each second anti-fluff rod 3122 is connected to the inner wall of the cylinder 311, and the second end of each second anti-fluff rod 3122 is inclined away from the air inlet side of the cylinder 311 and in the opposite direction of the spiral rotation R of the circulating gas.

[0066] The technical solution provided in this application embodiment is that when some of the heavier flocculent matter in the circulating gas passes the first anti-flocculent rod 3121, it is easily intercepted by the second anti-flocculent rod 3122, which is inclined in the opposite direction of the spiral rotation R of the circulating gas, from the air outlet side of the cylinder 311 to the air inlet side of the cylinder 311, thereby improving the effect of the anti-flocculent grid 312 in intercepting flocculent matter.

[0067] The number of the first anti-fluff rod 3121 and the second anti-fluff rod 3122 can be set according to the size of the cylinder 311 and the dust removal requirements.

[0068] Along the height direction of the cylinder 311, a plurality of first anti-fluff rods 3121 are arranged at intervals in layers; along the height direction of the cylinder 311, a plurality of second anti-fluff rods 3122 are arranged at intervals in layers.

[0069] The layered layout of the first anti-fluff rod 3121 and the second anti-fluff rod 3122, with their varying heights, forms a stepped interception system, ensuring that fluffy material is intercepted at multiple levels as it spirals upwards. The technical solution provided in this application embodiment is beneficial for further improving the effectiveness of the anti-fluff grid 312 in intercepting fluffy material.

[0070] Multiple first anti-fluff rods 3121 and multiple second anti-fluff rods 3122 on each layer are arranged in a staggered manner in the vertical direction; the second ends of the multiple first anti-fluff rods 3121 on each layer intersect at least in pairs, and the second ends of the multiple second anti-fluff rods 3122 on each layer intersect at least in pairs.

[0071] The technical solution provided in this application embodiment is beneficial to further improve the effect of the anti-fluff grid 312 in intercepting fluffy materials. The first anti-fluff rod 3121 and the second anti-fluff rod 3122, which are arranged in a high-altitude staggered manner, can create a highly dense interception net to achieve bidirectional interception of fluffy materials. At the same time, the cross design of the second end of the anti-fluff rods in the same layer increases the overlap between the anti-fluff rods, forming a higher density grid and enhancing the interception effect on fluffy materials.

[0072] Referring to Figures 1 and 2, each cyclone assembly 30 includes an airflow regulating device 33, which is disposed between the air inlet of the cyclone cylinder 31 and the air outlet on the upper side wall of the central header 10.

[0073] The air volume regulating device 33 can be a butterfly valve or a louvered regulating valve, etc., and its installation position is located at the connection between the air outlet of the central main pipe 10 and the air inlet of the cyclone 31. The air volume regulating device 33 can be equipped with a manual adjustment mechanism or an electric actuator.

[0074] The technical solution provided in this application embodiment allows for independent adjustment of the airflow inlet of each cyclone 31 by adjusting the size of the airflow regulating device 33, ensuring uniform gas flow distribution across multiple cyclone 31s. Furthermore, under low-load conditions, the airflow at the inlet of some cyclone 31s can be reduced to accommodate the cyclone flow of the annular multi-cylinder cyclone secondary dust collector 400 without affecting the normal operation of the remaining cyclone 31s. Additionally, when a cyclone 31 malfunctions, the airflow regulating device 33 of the malfunctioning cyclone 31 can be shut off, facilitating individual repair of that malfunctioning cyclone 31.

[0075] In some embodiments, each cyclone assembly 30 includes an inspection valve 34 and a gate valve 35; the inspection valve 34 is disposed between the air inlet on the side wall of the upper air chamber 40 and the air outlet of the cyclone 31; the gate valve 35 is disposed between the outlet at the lower part of the hopper 32 and the inlet on the side wall of the total ash hopper 20.

[0076] The technical solution provided in this application embodiment allows for the separate maintenance of a cyclone 31 when a certain cyclone 31 malfunctions, by disassembling the airflow regulating device 33, the maintenance valve 34, and the slide valve 35 corresponding to the malfunctioning cyclone 31.

[0077] In conventional technical solutions, the elevation of the air inlet chamber of the secondary dust collector is relatively high, while the elevation of the air outlet of the dry quenching coke boiler 200 is relatively low. This means that the circulating gas pipeline between the dry quenching coke boiler 200 and the secondary dust collector needs to be set up as a high vertical pipe, which increases the footprint and pipeline resistance.

[0078] In the technical solution provided in this application embodiment, each hopper 32 and the central header 10 are at least partially at the same height. The cyclone assembly 30 and the central header 10 are staggered in the height direction, which, compared with the multi-tube cyclone separator arranged vertically in conventional technical solutions, helps to reduce the overall height of the secondary dust removal device.

[0079] In this design, the overall height of the annular multi-cylinder cyclone secondary dust removal device 400 is relatively low, which reduces the height difference between the tangential air inlet 11 of the central header 10 and the air outlet of the dry quenching coke boiler 200. This reduces the height of the air inlet side riser of the annular multi-cylinder cyclone secondary dust removal device 400, thereby reducing the space occupied by the air inlet side riser and the pipe resistance.

[0080] In addition, the overall height of the annular multi-cylinder cyclone secondary dust removal device 400 is relatively low, which reduces the height difference between the top dust removal outlet of the upper air chamber 40 and the air inlet of the circulating fan 500. This reduces the height of the outlet side riser of the annular multi-cylinder cyclone secondary dust removal device 400 (the riser connecting the top dust removal outlet of the upper air chamber 40 and the air inlet of the circulating fan 500), thus reducing the space occupied by the outlet side riser and the pipe resistance, making it less prone to dust accumulation.

[0081] Figure 5 is a schematic diagram of the process flow of a dry quenching system provided in an embodiment of this application, and Figure 6 is a schematic diagram of the plan layout of a dry quenching system provided in an embodiment of this application. As shown in Figures 5 and 6, a dry quenching system includes: a dry quenching furnace 100, a dry quenching boiler 200, a primary dust collector 300, a ring-shaped multi-cylinder cyclone secondary dust collector 400, and a circulating fan 500.

[0082] The primary dust collector 300 is used to remove dust from the high-temperature circulating gas of the dry quenching furnace 100 and send it to the dry quenching boiler 200 for heating to generate steam; the annular multi-cylinder cyclone secondary dust collector 400 of the above embodiment sends the circulating gas discharged from the dry quenching boiler 200 into the central header 10 of the annular multi-cylinder cyclone secondary dust collector 400 at an angle downward through the tangential air inlet 11, so that the annular multi-cylinder cyclone secondary dust collector 400 performs secondary dust removal; the circulating fan 500 is used to circulate the secondary dust removal circulating gas to the dry quenching furnace 100 after passing through the heat pipe heat exchanger 600.

[0083] Specifically, the downward tilt angle of the tangential air inlet 11 is α, where 10°≤α≤20°, for example, α=15°.

[0084] Specifically, the inner wall of the central header 10 facing the tangential air inlet 11 is provided with a first wear-resistant ceramic plate in order to improve the service life of the annular multi-cylinder cyclone secondary dust removal device 400.

[0085] Figure 7 is a front view of a circulating fan 500 of a dry quenching system provided in an embodiment of this application. Figure 8 is a structural diagram of the structure along direction D in Figure 7. As shown in Figures 7 and 8, the circulating fan 500 includes an air inlet channel 510, a rotary channel 520, and an air outlet channel 530. The air inlet channel 510, the rotary channel 520, and the air outlet channel 530 are connected sequentially. The air inlet channel 510 is connected to the air outlet of the annular multi-cylinder cyclone secondary dust removal device 400. The air outlet channel 530 is connected to the inlet of the circulating gas heat exchanger 600. At least a portion of the inner wall of the rotary channel 520 is provided with a second wear-resistant ceramic plate 540 to improve the service life of the circulating fan 500.

[0086] The circulating fan 500 includes a motor 550. Driven by the motor 550, the circulating gas enters the circulating fan 500 through the air inlet channel 510, passes through the rotary channel 520, and is blown out through the air outlet channel 530.

[0087] Taking an angle of 120° between the air inlet direction of the air inlet channel 510 and the air outlet direction of the air outlet channel 530, and an example where the rotary channel 520 rotates approximately one full turn, the circulating gas is blown into the air inlet channel 510 at a 120° angle. After rotating approximately one full turn within the circulating fan 500, the circulating gas is blown out of the air outlet channel 530 at a 0° angle. In practice, the second wear-resistant ceramic plate 540 can be positioned within the arc range of the rotary channel 520, from 0° to 180°.

[0088] Specifically, the circulating fan 500 can have two air inlet channels 510, which are located on both sides of the rotating channel 520. The air outlet of the upper air chamber 40 is divided into two paths by the airflow distribution pipe 50, which are connected to the two air inlet channels 510 one by one.

[0089] 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 ring-shaped multi-cylinder cyclone secondary dust removal device, characterized in that, include: A central header (10) has a tangential air inlet (11) on its side wall for introducing circulating gas into the central header (10) and causing the circulating gas to rotate downwards in a spiral motion for preliminary centrifugal dust removal; a total ash hopper (20) is connected to the outlet at the lower part of the central header (10); multiple cyclone assemblies (30) surround the outside of the central header (10), each cyclone assembly (30) includes a cyclone cylinder (31) and a hopper (32), and the air inlet on the side wall of each cyclone cylinder (31) is connected to the air outlet on the upper side wall of the central header (10) so that the central header (10) can be connected to the outlet at the upper side wall of the central header (10). The circulating gas inside enters the cyclone (31) from the upper part of the central header (10) and moves in a spiral rotation trajectory to remove dust again. In each cyclone assembly (30), the lower part of the cyclone (31) is connected to the upper part of the hopper (32), and the outlet of the lower part of each hopper (32) is connected to the inlet of the side wall of the total ash hopper (20). The upper air chamber (40) is located above the central header (10), and the air inlet of the side wall of the upper air chamber (40) is connected to the air outlet of each cyclone (31). The top of the upper air chamber (40) is provided with a dust removal air outlet.

2. The annular multi-cylinder cyclone secondary dust removal device according to claim 1, characterized in that, Each cyclone (31) includes: a cylinder (311) for centrifugal dust removal of circulating gas in a spiral rotation and a lint-proof grid (312); the lint-proof grid (312) is disposed inside the cylinder (311).

3. The annular multi-cylinder cyclone secondary dust removal device according to claim 2, characterized in that, The anti-fluffing grid (312) includes a plurality of first anti-fluffing rods (3121); the plurality of first anti-fluffing rods (3121) are arranged around the axis of the cylinder (311) inside the cylinder (311), the first end of each first anti-fluffing rod (3121) is connected to the inner wall of the cylinder (311), and the second end of each first anti-fluffing rod (3121) is inclined toward the air inlet side of the cylinder (311) and in the opposite direction (R) to the spiral rotation of the circulating gas.

4. The annular multi-cylinder cyclone secondary dust removal device according to claim 3, characterized in that, The anti-fluffing grid (312) includes a plurality of second anti-fluffing rods (3122); the plurality of second anti-fluffing rods (3122) are arranged around the axis of the cylinder (311) inside the cylinder (311), the first end of each second anti-fluffing rod (3122) is connected to the inner wall of the cylinder (311), and the second end of each second anti-fluffing rod (3122) is inclined away from the air inlet side of the cylinder (311) and in the opposite direction (R) to the spiral rotation direction of the circulating gas.

5. The annular multi-cylinder cyclone secondary dust removal device according to claim 4, characterized in that, Along the height direction of the cylinder (311), a plurality of first anti-fluff rods (3121) are arranged in layers at intervals; and / or, along the height direction of the cylinder (311), a plurality of second anti-fluff rods (3122) are arranged in layers at intervals.

6. The annular multi-cylinder cyclone secondary dust removal device according to claim 5, characterized in that, Multiple first anti-fluff rods (3121) and multiple second anti-fluff rods (3122) on each layer are arranged in a staggered manner in the vertical direction; the second ends of the multiple first anti-fluff rods (3121) on each layer intersect at least in pairs, and the second ends of the multiple second anti-fluff rods (3122) on each layer intersect at least in pairs.

7. The annular multi-cylinder cyclone secondary dust removal device according to claim 1, characterized in that, Each cyclone assembly (30) includes an airflow regulating device (33) disposed between the air inlet of the cyclone tube (31) and the air outlet on the upper side wall of the central header (10).

8. The annular multi-cylinder cyclone secondary dust removal device according to claim 7, characterized in that, Each cyclone assembly (30) includes a maintenance valve (34) and a gate valve (35); the maintenance valve (34) is located between the air inlet on the side wall of the upper air chamber (40) and the air outlet of the cyclone tube (31); the gate valve (35) is located between the outlet at the lower part of the hopper (32) and the inlet on the side wall of the total ash hopper (20).

9. The annular multi-cylinder cyclone secondary dust removal device according to claim 1, characterized in that, Each hopper (32) and the central header (10) are at least partially at the same height.

10. A dry quenching system, characterized in that, include: Dry quenching furnace (100); dry quenching coke boiler (200); primary dust collector (300) for primary dust removal of the high-temperature circulating gas of the dry quenching furnace (100) and feeding it into the dry quenching coke boiler (200) for heating to generate steam; annular multi-cylinder cyclone secondary dust removal device (400) according to any one of claims 1 to 9, wherein the circulating gas discharged from the dry quenching coke boiler (200) is fed into the central header (10) of the annular multi-cylinder cyclone secondary dust removal device (400) at an angle downward through the tangential air inlet (11), so that the annular multi-cylinder cyclone secondary dust removal device (400) performs secondary dust removal; circulating fan (500) for circulating the secondary dust removal circulating gas to the dry quenching furnace (100) after passing through the heat pipe heat exchanger (600).

11. The dry quenching system according to claim 10, characterized in that, The central header (10) has a first wear-resistant ceramic plate on its inner wall facing the tangential air inlet (11); the circulating fan (500) includes an air inlet channel (510), a rotary channel (520) and an air outlet channel (530), the air inlet channel (510), the rotary channel (520) and the air outlet channel (530) are connected in sequence, the air inlet channel (510) is connected to the air outlet of the annular multi-cylinder cyclone secondary dust removal device (400), the air outlet channel (530) is connected to the inlet of the circulating gas heat exchanger (600), and at least a portion of the inner wall of the rotary channel (520) is provided with a second wear-resistant ceramic plate (540).

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