A dry quenching boiler and dry quenching system

Abstract

The utility model embodiment provides a kind of dry quenching boiler and dry quenching system, including flue gas passage, evaporimeter and coal economizer, warehouse type pneumatic conveying pump and ash discharge control assembly.The bottom of tail passage is provided with the ash bucket that is dug in the ground arrangement;Warehouse type pneumatic conveying pump is set below ash bucket;Ash discharge control assembly includes: first material level monitoring meter, second material level monitoring meter and controller, first material level monitoring meter is set to the low of ash bucket, and second material level monitoring meter is set to the high of ash bucket;When first material level monitoring meter monitors that the low of ash bucket does not exist ash material, controller closes warehouse type pneumatic conveying pump, and when second material level monitoring meter monitors that the high of ash bucket exists ash material, controller opens warehouse type pneumatic conveying pump.The technical scheme is arranged by the way of digging ground to arrange ash bucket and warehouse type pneumatic conveying pump, utilizes the synergistic effect of high-low double material level monitoring and automatic control system, and realizes the accurate regulation and control of ash discharge process.

Description

Technical Field

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

[0002] In the production process of heat recovery coke ovens, a large amount of flocculent fibrous material is generated during the dry quenching process of coke. Currently, some dry quenching systems use gravity dust removal in the primary dust removal stage. This dust removal technology has the inherent defect of low dust removal efficiency and cannot effectively intercept the aforementioned flocculent fibrous material, causing it to enter the dry quenching boiler system with the circulating gas.

[0003] Upon entering the boiler, the flocculent fibrous material easily adheres and accumulates on the surface of the heated pipes, forming a bridging-like aggregate structure that is difficult to be carried away by the circulating gas. In the boiler outlet flue area, influenced by the airflow characteristics, a mainstream zone forms at the outlet end due to the continuous high-speed airflow, while dead zones easily form in the distant area far from the outlet. Flocculent agglomerates formed by the agglomeration of the flocculent fibrous material preferentially deposit in these dead zones and gradually expand to the surrounding areas over time.

[0004] When ash buildup is severe, flocculent material can completely cover the economizer's heating surface, leading to a sharp increase in boiler system pressure drop and a significant decrease in heat exchange efficiency. Localized ash accumulation causes uneven temperature distribution on the heating surface, increasing temperature differences and easily inducing cracks due to thermal stress, posing a serious threat to the safe and stable operation of the dry quenching system. Especially when the dry quenching boiler operates at low loads for extended periods, the reduced flue gas velocity makes it even more difficult for the flocculent material to be carried away by the circulating gas, exacerbating the accumulation problem and further aggravating the adverse effects on the boiler system's operational safety and economy. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a dry quenching boiler and dry quenching system to reduce the problem of flocculent blockage and improve its operational safety and stability. The specific technical solution is as follows:

[0006] A dry quenching coke boiler, comprising:

[0007] flue gas passage;

[0008] An evaporator and an economizer are installed within the flue gas passage; wherein...

[0009] The tail section of the flue gas passage extends from top to bottom, and a dust hopper is provided at the bottom of the tail section, which is dug into the ground. The bottom of the dust hopper is provided with a dust discharge port. Along the first horizontal direction, the tail section includes a first side wall and a second side wall on both sides, and the first side wall is provided with a flue gas outlet.

[0010] A silo-type pneumatic conveying pump is installed below the ash hopper, and the inlet of the silo-type pneumatic conveying pump is connected to the ash discharge port;

[0011] The ash discharge control component includes: a first level monitor, a second level monitor, and a controller. The first level monitor is located at the low position of the ash hopper and is used to monitor whether there is ash at the low position of the ash hopper. The second level monitor is located at the high position of the ash hopper and is used to monitor whether there is ash at the high position of the ash hopper.

[0012] The controller is electrically connected to the first level monitor, the second level monitor, and the silo pneumatic conveying pump. When the first level monitor detects that there is no ash at the low level of the ash hopper, the controller shuts down the silo pneumatic conveying pump. When the second level monitor detects that there is ash at the high level of the ash hopper, the controller turns on the silo pneumatic conveying pump.

[0013] In some embodiments, along a first horizontal direction, the two sides of the ash hopper include opposing first ash hopper walls and second ash hopper walls, the first ash hopper wall and the first side wall being on the same side, and the second ash hopper wall and the second side wall being on the same side.

[0014] The second sidewall and the second ash hopper wall are connected.

[0015] In some embodiments, it also includes:

[0016] The alarm component includes a third level monitor and an alarm. The third level monitor is disposed on the second side wall and is located below the economizer and above the ash hopper. It is used to monitor whether ash material is accumulated above the ash hopper.

[0017] The alarm is electrically connected to the third level monitor. When the third level monitor detects ash accumulating above the ash hopper, it controls the alarm to sound.

[0018] In some embodiments, the first level monitor, the second level monitor, and the third level monitor are all inclined downwards.

[0019] In some embodiments, the ash hoppers are at least two arranged side by side along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

[0020] In some embodiments, the lower part of the second sidewall is inclined toward the centerline of the tail channel.

[0021] In some embodiments, the centerline of the ash hopper is located on the side of the centerline of the tail passage closer to the flue gas outlet.

[0022] In some embodiments, the heating surface of the economizer is a bare tube; or, the heating surface of the economizer is a finned tube, the finned tube comprising: a tube body and multiple pairs of fins, the multiple pairs of fins being sequentially and spaced apart on the outer wall of the tube body along the extending direction of the tube body, and each pair of fins being disposed on both sides of the outer wall of the tube body, with a gap between each pair of fins.

[0023] In some embodiments, it also includes:

[0024] A soot blower is positioned above the evaporator and economizer.

[0025] A dry quenching system, comprising:

[0026] Coke ovens and the aforementioned dry quenching coke boilers.

[0027] The dry quenching coke boiler provided in this embodiment includes a flue gas passage, an evaporator and an economizer, a silo-type pneumatic conveying pump, and an ash discharge control assembly. The evaporator and economizer are disposed within the flue gas passage; the tail section of the flue gas passage extends from top to bottom, and an ash hopper excavated into the ground is disposed at the bottom of the tail section, with an ash discharge port at the bottom of the ash hopper; along a first horizontal direction, the tail section includes a first sidewall and a second sidewall, with a flue gas outlet on the first sidewall; the silo-type pneumatic conveying pump is disposed below the ash hopper, and its inlet is connected to the ash discharge port; the ash discharge control assembly includes a first level gauge, a second level gauge, and a controller. The first level monitor is set at the low position of the ash hopper to monitor whether there is ash material at the low position of the ash hopper. The second level monitor is set at the high position of the ash hopper to monitor whether there is ash material at the high position of the ash hopper. The controller is electrically connected to the first level monitor, the second level monitor and the silo pneumatic conveying pump respectively. When the first level monitor detects that there is no ash material at the low position of the ash hopper, the controller shuts down the silo pneumatic conveying pump. When the second level monitor detects that there is ash material at the high position of the ash hopper, the controller turns on the silo pneumatic conveying pump.

[0028] In one embodiment of this application, the technical solution achieves precise control of the ash removal process through the synergistic effect of dual-level monitoring (low and high levels) and an automatic control system. Its working principle is as follows: the high-level monitor (second level monitor) triggers an ash removal start signal to prevent ash accumulation, which could affect flue gas flow and heat exchange on the heating surface; the low-level monitor (first level monitor) issues a stop signal, automatically shutting down the silo-type pneumatic conveying pump after ash removal. Effective material sealing is maintained by the ash below the low level in the ash hopper, preventing external air from seeping into the dry-quenching coke boiler. Compared to traditional timed ash removal or manual observation methods, this solution effectively solves the problem of flue blockage caused by untimely ash removal, while avoiding heat loss due to excessive ash removal. Automated control reduces manual intervention, lowering the frequency and intensity of manual entry into hazardous areas for inspection or cleaning, thus improving operational safety. The systematic design reduces the number of unplanned shutdowns for maintenance, improving equipment uptime and production efficiency. On the other hand, by excavating the ground to arrange the ash hopper and silo-type pneumatic conveying pump, the industry problem of severe flocculent deposition and blockage in the "dead zone" of the dry quenching coke oven under conditions of limited space and low load is creatively solved, significantly improving the system's safety, stability, operating efficiency and adaptability.

[0029] 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

[0030] 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.

[0031] Figure 1 A partial structural schematic diagram of a dry quenching coke boiler provided in an embodiment of this application;

[0032] Figure 2 for Figure 1 A schematic diagram of the dry quenching coke boiler shown in section A;

[0033] Figure 3 for Figure 1 The diagram shows the electrical connection structure of the ash discharge control component of the dry quenching coke boiler.

[0034] Figure 4 for Figure 1 The diagram shows the electrical connection structure of the alarm component of the dry quenching coke boiler.

[0035] Figure 5 for Figure 1 The diagram shows the main view of the finned tube structure of the dry quenching coke boiler.

[0036] Figure 6 for Figure 5 The diagram shows a schematic left view of the finned tube structure of a dry quenching coke boiler.

[0037] The attached figures are labeled as follows:

[0038] Flue gas passage 1, tail passage 11, first side wall 111, second side wall 112, flue gas outlet 113, ash hopper 2, first ash hopper wall 21, second ash hopper wall 22, silo-type pneumatic conveying pump 3, ash discharge control assembly 4, first level gauge 41, second level gauge 42, controller 43, alarm assembly 5, third level gauge 51, alarm 52, finned tube 6, tube body 61, fins 62.

[0039] First horizontal direction X, second horizontal direction Y. Detailed Implementation

[0040] 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.

[0041] In related technologies, in dry quenching coke boilers where gravity dust removal is used for primary dust collection, the space between the bottom of the flue gas outlet and the floor surface is limited. Therefore, the main objective of this application is to develop a novel ash discharge conveying method and material level control method to reduce clogging by flocculent materials and improve the safety and stability of its operation.

[0042] Figure 1 This is a partial structural diagram of a dry quenching coke boiler provided in an embodiment of this application. Figure 2 for Figure 1 The diagram shown is a schematic representation of the dry quenching coke boiler along direction A. Figure 3 for Figure 1 The diagram shows the electrical connection structure of the ash discharge control component 4 in the dry quenching coke boiler. Figure 1 , Figure 2 and Figure 3 As shown, this application proposes a dry quenching coke boiler, including a flue gas passage 1, an evaporator and an economizer, a bin-type pneumatic conveying pump 3, and an ash discharge control assembly 4.

[0043] An evaporator and an economizer are installed in the flue gas passage 1. The tail passage 11 of the flue gas passage 1 extends from top to bottom, and an ash hopper 2 excavated into the ground is installed at the bottom of the tail passage 11. An ash discharge port is installed at the bottom of the ash hopper 2. Along the first horizontal direction X, the two sides of the tail passage 11 include a first side wall 111 and a second side wall 112. A flue gas outlet 113 is installed on the first side wall 111. A silo-type pneumatic conveying pump 3 is installed below the ash hopper 2, and the inlet of the silo-type pneumatic conveying pump 3 is connected to the ash discharge port. The ash discharge control component 4 includes a first level monitor 41, a second level monitor 42, and a controller 43. The first level monitor 41 is installed at the low position of the ash hopper 2 to monitor whether there is ash at the low position of the ash hopper 2. The second level monitor 42 is installed at the high position of the ash hopper 2 to monitor whether there is ash at the high position of the ash hopper 2.

[0044] The controller 43 is electrically connected to the first level monitor 41, the second level monitor 42 and the silo pneumatic conveying pump 3 respectively. When the first level monitor 41 detects that there is no ash material at the low level of the ash hopper 2, the controller 43 shuts down the silo pneumatic conveying pump 3. When the second level monitor 42 detects that there is ash material at the high level of the ash hopper 2, the controller 43 turns on the silo pneumatic conveying pump 3.

[0045] Specifically, the first level monitor 41 and the second level monitor 42 are installed at an angle downwards, preferably at an angle of 30°-60°, in order to reduce the probability of flocculation at the sensing ends of the first level monitor 41 and the second level monitor 42, and to maintain the detection sensitivity at the ends of the first level monitor 41 and the second level monitor 42.

[0046] In one embodiment of this application, the technical solution achieves precise control of the ash removal process through the synergistic effect of dual-level monitoring (low and high levels) and an automatic control system. Its working principle is as follows: the high-level monitor (second level monitor 42) triggers an ash removal start signal to prevent ash accumulation, which could affect flue gas flow and heat exchange on the heating surface; the low-level monitor (first level monitor 41) issues a stop signal, automatically shutting off the silo-type pneumatic conveying pump 3 after ash removal. The ash below the low level in the ash hopper 2 maintains an effective material seal, preventing external air from seeping into the dry-quenching coke boiler. Compared to traditional timed ash removal or manual observation methods, this solution effectively solves the problem of flue blockage caused by untimely ash removal, while avoiding heat loss due to excessive ash removal. Automated control reduces manual intervention, lowering the frequency and intensity of manual entry into hazardous areas for inspection or cleaning, thus improving operational safety. The systematic design reduces the number of unplanned shutdowns for maintenance, improving equipment uptime and production efficiency.

[0047] On the other hand, by excavating the ground to arrange the ash hopper 2 and the silo-type pneumatic conveying pump 3, the industry problem of severe flocculent deposition and blockage in the "dead zone" of the heat recovery coke oven dry quenching boiler under the conditions of limited space and low load is creatively solved, which significantly improves the safety, stability, operating efficiency and adaptability of the system.

[0048] Along the first horizontal direction X, the two sides of the ash hopper 2 include a first ash hopper wall 21 and a second ash hopper wall 22, which are opposite each other. The first ash hopper wall 21 and the first side wall 111 are on the same side, and the second ash hopper wall 22 and the second side wall 112 are on the same side; the second side wall 112 and the second ash hopper wall 22 are connected. Specifically, the lower part of the second side wall 112 is inclined towards the centerline of the tail channel 11, that is, the lower region of the second side wall 112 forms a certain angle relative to the vertical direction, which is towards the centerline of the tail channel 11. The angle of inclination can be set from 40° to 60°. The inclination can be achieved by designing the lower part of the second side wall 112 as a sloping structure or by using an arc-shaped transition section. This inclined structure can be formed by welding steel plates.

[0049] Therefore, this technical solution effectively improves flue gas flow characteristics by forming an inclined structure towards the centerline at the lower part of the second sidewall 112. When flue gas containing flocculent fibrous material passes through the tail channel 11, the inclined sidewall guides the airflow towards the central area, reducing the stagnation of flue gas near the sidewall. Specifically, the guiding effect of the inclined structure promotes the sliding of deposited flocculent material along the inclined surface towards the ash hopper 2 under gravity, preventing accumulation in the sidewall area. Compared with the vertical sidewall structure in the prior art, this solution significantly reduces the probability of flow dead zones, thereby alleviating the problems of increased boiler pressure drop and decreased heat exchange efficiency caused by flocculent material accumulation.

[0050] Figure 4 for Figure 1 The diagram shows the electrical connection structure of the alarm component 5 in the dry quenching coke boiler. Figure 4 As shown, further embodiments of this application propose adding an alarm component 5 to the dry quenching coke boiler. This alarm component 5 includes a third level monitor 51 and an alarm 52. The third level monitor 51 is installed on the second side wall 112, located below the economizer and above the ash hopper 2, and is used to monitor whether ash material accumulates above the ash hopper 2. The alarm 52 is electrically connected to the third level monitor 51, and when ash material accumulation is detected above the ash hopper 2, the alarm 52 sounds an alarm.

[0051] Combination Figure 1 and Figure 2 As shown, specifically, the third level monitor 51 is installed at an angle downwards, preferably at an angle of 30°-60°, in order to reduce the probability of flocculent material accumulating at the sensing end of the third level monitor 51 and maintain the detection sensitivity of the end of the third level monitor 51.

[0052] Alarm 52 can be an audible and visual alarm 52, which can be installed in a location that is easy for operators to detect in a timely manner. For example, the alarm signal can be connected to the boiler control system to achieve linkage control with the ash discharge control component 4.

[0053] This technical solution, by adding a high-level monitoring point (third level monitor 51), can promptly detect abnormal accumulation of flocculent fibrous material in the flue gas passage 1. When the flocculent material begins to accumulate below the economizer and exceeds the high level of the ash hopper 2, reaching the high-level monitoring point, the third level monitor 51 can detect the material accumulation signal and trigger the alarm 52. Therefore, if the ash discharge control component 4 malfunctions, operators can promptly take ash removal measures to prevent further deterioration of the ash accumulation problem. Compared with existing technologies that rely solely on ash hopper 2 level monitoring, this solution provides early warning of ash accumulation problems, effectively solving issues such as increased boiler pressure drop and decreased heat exchange efficiency caused by flocculent material accumulation. Simultaneously, early warning reduces the risk of thermal stress cracking caused by localized ash accumulation, ensuring the safe and stable operation of the boiler system.

[0054] Furthermore, this application also proposes that, along the second horizontal direction Y, at least two ash hoppers 2 are arranged side by side, and the second horizontal direction Y is perpendicular to the first horizontal direction X.

[0055] Specifically, the ash hoppers 2 can be arranged in a symmetrical or asymmetrical configuration. In one embodiment, two ash hoppers 2 are symmetrically arranged along the second horizontal direction Y at the bottom of the tail channel 11, and each ash hopper 2 is equipped with an independent silo-type pneumatic conveying pump 3. In another embodiment, three ash hoppers 2 are arranged in a linear array, with equal spacing between adjacent hoppers. The cross-sectional shape of the ash hoppers 2 can be rectangular or trapezoidal, with a trapezoidal cross-section facilitating ash material sliding.

[0056] Therefore, this technical solution achieves the following technical effects through the parallel arrangement of multiple funnels: First, the parallel arrangement of multiple funnels helps to reduce the height of the ash hopper 2, thereby reducing the height space occupied by the ash hopper 2. Second, multiple ash hoppers 2 can form a zoned ash unloading mode. When flocculent material accumulates in a local area, the ash unloading valve of the corresponding area can be opened individually for targeted cleaning, avoiding energy waste caused by overall ash unloading.

[0057] Furthermore, embodiments of this application also propose that the centerline of the ash hopper 2 is located on the side of the centerline of the tail channel 11 near the flue gas outlet 113.

[0058] Specifically, the centerline of the ash hopper 2 is offset from the centerline of the tail channel 11, with the offset direction pointing towards the side where the flue gas outlet 113 is located. With this arrangement, while the inclination angles of the first ash hopper wall 21 and the second ash hopper wall 22 on both sides of the ash hopper 2 are the same, it provides inclined space for the inclined second sidewall.

[0059] To address this, the proposed technical solution shifts the centerline of the ash hopper 2 towards the flue gas outlet 113, making it easier for the flocculent fibrous material accumulated at the bottom of the tail channel 11 to slide into the ash hopper 2. Due to the continuous airflow at the flue gas outlet 113, the flocculent material moves towards the ash hopper 2 under the combined action of gravity and airflow, effectively avoiding the problem of flocculent material accumulating on the side far from the outlet, as seen in traditional symmetrical structures. Compared to existing technologies, this structure significantly improves ash removal efficiency, especially solving the ash accumulation problem caused by reduced flue gas velocity under low-load conditions, thus reducing the frequency of manual cleaning and maintenance costs.

[0060] Figure 5 for Figure 1 The diagram shows the main structural view of the finned tube 6 in the dry quenching coke boiler. Figure 6 for Figure 5 The schematic diagram of the left-hand structure of the finned tube 6 of the dry quenching coke boiler shown is as follows: Figure 5 and Figure 6 As shown, the heating surface of the economizer is a bare tube; or, the heating surface of the economizer is a finned tube 6, which includes a tube body 61 and multiple pairs of fins 62. Along the extension direction of the tube body 61, multiple pairs of fins 62 are arranged sequentially and at intervals on the outer wall of the tube body 61, and each pair of fins 62 is arranged on both sides of the outer wall of the tube body 61, with a gap between each pair of fins 62.

[0061] This technical solution optimizes the structure of the heating surface of the economizer, making the heating surface of the economizer a bare tube or an H-shaped finned tube 6 (the finned tube 6 includes a tube body 61 and multiple pairs of fins 62. Along the extension direction of the tube body 61, multiple pairs of fins 62 are arranged sequentially and at intervals on the outer wall of the tube body 61, and each pair of fins 62 is arranged on both sides of the outer wall of the tube body 61, with gaps between each pair of fins 62). This significantly reduces the tendency of flocculent material to adhere, stick, and accumulate on the heating surface of the economizer, thereby reducing the accumulation of blockages from the source, reducing bridging of flocculent material on the heating surface, and reducing the probability of flocculent material accumulating on the heating surface of the economizer. On the other hand, an ash hopper 2 is provided at the bottom of the tail channel 11. After entering the tail channel 11, the flocculent material can flow from top to bottom and be deposited in the ash hopper 2. This is used to collect and store the flocculent agglomerates that fall off from the flue wall and dead zone of the flue gas channel 1. The flocculent material deposited in the ash hopper 2 can be discharged by turning on the hopper-type pneumatic conveying pump 3, thereby reducing the total amount of flocculent material in the flue gas channel 1, thus reducing the problem of flocculent material blockage and improving the safety and stability of the dry quenching coke boiler operation.

[0062] Further, embodiments of the present application also provide that a plurality of soot blowers are arranged in the dry quenching boiler, which are respectively installed above the economizer and the evaporator.

[0063] In this technical solution, by arranging a soot blowing device in the area above the heating surfaces of the economizer and the evaporator, the flocculent fibrous substances adhered to the surface of the tube bundles of the economizer and the evaporator can be effectively removed. When the boiler is in operation, the soot blowers operate periodically or as required, and the soot blowers are used to damage the bonding structure of the ash deposition layer, so that the flocculent substances fall off from the heating surfaces and are carried away by flue gas. This active ash removal method solves the problem of fiber accumulation that is difficult to handle by traditional gravity dust removal, and avoids the reduction of heat exchange efficiency of heating surfaces and the risk of thermal stress cracks caused by ash deposition. Especially under low-load working conditions, increasing the soot blowing frequency can effectively compensate for the weakening of ash removal effect caused by the reduction of flue gas flow velocity, and maintain the stable operation of the boiler system.

[0064] A coke dry quenching system provided in an embodiment of the present application includes the coke dry quenching boiler of the above embodiment.

[0065] The coke dry quenching system creatively solves the industrial problem of serious deposition and blockage of flocculent substances in the "dead zone" of the coke dry quenching boiler of heat recovery coke ovens under the conditions of limited bottom space and proneness to problems under low loads, and significantly improves the safety, stability, operation efficiency and adaptability of the system.

[0066] The coke dry quenching system of the present application is not only applicable to the coke dry quenching boiler matched with a heat recovery coke oven, but also applicable to other boilers that are prone to ash deposition at the bottom.

[0067] The above description is only the preferred embodiments of the present utility model, and is not intended to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A dry quenching coke boiler, characterized in that, include: Flue gas passage (1); The evaporator and economizer are installed within the flue gas passage (1); wherein, The tail passage (11) of the flue gas passage (1) extends from top to bottom. The bottom of the tail passage (11) is provided with an ash hopper (2) dug into the ground. The bottom of the ash hopper (2) is provided with an ash discharge port. Along the first horizontal direction (X), the two sides of the tail passage (11) include a first side wall (111) and a second side wall (112). The first side wall (111) is provided with a flue gas outlet (113). A silo-type pneumatic conveying pump (3) is installed below the ash hopper (2), and the inlet of the silo-type pneumatic conveying pump (3) is connected to the ash discharge port; The ash discharge control component (4) includes: a first level monitor (41), a second level monitor (42), and a controller (43). The first level monitor (41) is located at the low position of the ash hopper (2) and is used to monitor whether there is ash material at the low position of the ash hopper (2). The second level monitor (42) is located at the high position of the ash hopper (2) and is used to monitor whether there is ash material at the high position of the ash hopper (2). The controller (43) is electrically connected to the first level monitor (41), the second level monitor (42) and the silo pneumatic conveying pump (3). When the first level monitor (41) detects that there is no ash in the low level of the ash hopper (2), the controller (43) shuts down the silo pneumatic conveying pump (3). When the second level monitor (42) detects that there is ash in the high level of the ash hopper (2), the controller (43) turns on the silo pneumatic conveying pump (3).

2. The dry quenching coke boiler according to claim 1, characterized in that, Along the first horizontal direction (X), the two sides of the ash hopper (2) include a first ash hopper wall (21) and a second ash hopper wall (22) opposite to each other. The first ash hopper wall (21) and the first side wall (111) are on the same side, and the second ash hopper wall (22) and the second side wall (112) are on the same side. The second sidewall (112) and the second ash hopper wall (22) are connected.

3. The dry quenching coke boiler according to claim 2, characterized in that, Also includes: The alarm component (5) includes a third level monitor (51) and an alarm (52). The third level monitor (51) is disposed on the second side wall (112). The third level monitor (51) is located below the economizer and above the ash hopper (2) and is used to monitor whether ash material is accumulated above the ash hopper (2). The alarm (52) and the third level monitor (51) are electrically connected. When the third level monitor (51) detects that ash material is accumulated above the ash hopper (2), it controls the alarm (52) to sound an alarm.

4. The dry quenching coke boiler according to claim 3, characterized in that, The first level monitor (41), the second level monitor (42), and the third level monitor (51) are all tilted downwards.

5. The dry quenching coke boiler according to claim 2, characterized in that, Along the second horizontal direction (Y), there are at least two ash hoppers (2) arranged side by side, and the second horizontal direction (Y) is perpendicular to the first horizontal direction (X).

6. The dry quenching coke boiler according to claim 2, characterized in that, The lower part of the second sidewall (112) is inclined toward the centerline of the tail channel (11).

7. The dry quenching coke boiler according to claim 1, characterized in that, The centerline of the ash hopper (2) is located on the side of the centerline of the tail channel (11) near the flue gas outlet (113).

8. The dry quenching coke boiler according to claim 1, characterized in that, The heating surface of the economizer is a bare tube; or, the heating surface of the economizer is a finned tube (6), the finned tube (6) includes: a tube body (61) and multiple pairs of fins (62), along the extension direction of the tube body (61), multiple pairs of fins (62) are arranged sequentially and at intervals on the outer wall of the tube body (61), and each pair of fins (62) is arranged on both sides of the outer wall of the tube body (61), and there is a gap between each pair of fins (62).

9. The dry quenching coke boiler according to claim 1, characterized in that, Also includes: A soot blower is positioned above the evaporator and the economizer.

10. A dry quenching system, characterized in that, include: Coke oven and dry quenching coke boiler as described in any one of claims 1 to 9.

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