Coking treatment device of circulating fluidized bed

Abstract

The utility model relates to the technical field of circulating fluidized bed boilers, and discloses a coking treatment device for a circulating fluidized bed, which comprises a heat exchanger, a circulating fluidized bed boiler and a circulating fluidized bed boiler, the cleaning device comprises a shell and a cleaning assembly; the cleaning assembly comprises a cleaning tool and a pull rod; the other end of the pull rod penetrates through the shell and extends to the outside; one end of the slag suction channel is communicated with the bottom of the cleaning device, and the other end is communicated with the slag collecting device; according to the coke treatment device of the circulating fluidized bed, the pull rod, the cleaning tool and the bottom ring form a coke removing structure which can be freely controlled by an operator to move, coke attached to the peripheral surface of the heat exchanger is effectively removed, the slag suction channel and the slag collecting device are matched to remove falling coke slag, the aim of thoroughly removing the coke is achieved under the action of double angles, and the coke removal efficiency is improved. And the cleaning device, the slag suction channel and the slag collecting device are matched to achieve the effects of removing cokes, transferring the coke slag and collecting the coke slag, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating fluidized bed boilers, in particular to a circulating fluidized bed coking treatment device. Background Art

[0002] Circulating fluidized bed boilers use high-efficiency, low-pollution clean combustion technology and are widely used in the field of power generation equipment; circulating fluidized bed boilers use fluidized combustion and have many advantages such as wide fuel adaptability, stable and efficient combustion, and excellent environmental protection performance.

[0003] In the prior art, circulating fluidized bed boilers will inevitably encounter coking problems during operation. The generated coke adheres to the outer wall of the heat exchanger for a long time, greatly affecting the working performance and efficiency of the heat exchanger, and further affecting the overall working performance of the circulating fluidized bed; if the coke is simply removed, the generated coking slag will accumulate at the bottom of the mechanism, affecting the subsequent cleaning work. Utility Model Content

[0004] In view of this, the utility model provides a circulating fluidized bed coking treatment device to solve the problem that coking is generated during the operation of the circulating fluidized bed and the generated coking cannot be completely treated and removed.

[0005] The utility model provides a circulating fluidized bed coking treatment device, comprising: a heat exchanger, on the outer peripheral wall of which coking is generated; a cleaning device, comprising a shell and a cleaning component, the shell is arranged around the outer periphery of the heat exchanger, and the cleaning component is slidably arranged on the inner peripheral wall of the shell; the cleaning component has a cleaning tool and a pull rod, and the cleaning side of the cleaning tool abuts against the outer peripheral wall of the heat exchanger; one end of the pull rod is fixed to the cleaning component, and the other end passes through the shell and extends to the outside, suitable for dragging the pull rod to move the cleaning component so that the cleaning tool removes the peeled coking; a slag suction channel, one end of which is connected to the bottom of the cleaning device, and the other end is connected to the slag collecting device, and the slag suction channel is suitable for sucking out the coke slag that falls off in the cleaning device and sending it into the slag collecting device.

[0006] Beneficial effects: The pull rod and the cleaning tool are both fixed at the bottom ring, the cleaning tool is tightly attached to the outer surface of the heat exchanger, and the top end of the pull rod passes through and extends to the external setting of the cleaning device, forming a coking removal structure that can be freely controlled and moved by the operator, which can effectively remove the coking attached to the outer surface of the heat exchanger. At the same time, a slag suction channel and a slag collecting device are also added to achieve the purpose of thoroughly removing the detached coking slag. Under the action of double angles, the purpose of thoroughly removing the coking generated during the operation of the circulating fluidized bed is achieved, ensuring that the heat exchanger is always in an excellent working condition, preventing coking from affecting the heat exchange efficiency, and the overall working performance of the circulating fluidized bed is transitioned; for coking at different positions on the surface of the heat exchanger, the operator uses the pull rod to control the cleaning tool to move to the corresponding position to accurately brush off the coking, which is easy to use and has strong practical performance; the cleaning device, the slag suction channel and the slag collecting device cooperate with each other to respectively remove coking, transfer coking slag and store coking slag, which can thoroughly remove the coking on the surface of the heat exchanger and has strong practical performance.

[0007] In an optional embodiment, the cleaning assembly also includes: a bottom ring, which is slidably connected to the inner wall of the shell, the cleaning tool is fixed to the bottom ring, one end of the pull rod is fixed to the bottom ring, and the other end passes through the shell and extends to the outside, suitable for moving the bottom ring relative to the shell with the help of the pull rod.

[0008] In an optional embodiment, it also includes: a clamping arm, one end of which is fixed to the slag collecting device, and the other end is fixed with a claw, and the claw is clamped on the outer periphery of the heat exchanger, suitable for detachably connecting the slag collecting device to the heat exchanger.

[0009] In an optional embodiment, a plurality of the cleaning tools are evenly spaced along the circumference of the heat exchanger.

[0010] In an optional embodiment, a negative pressure absorber is provided in the slag suction channel, an exhaust slot is provided on the top of the slag collecting device, and the negative pressure absorber is suitable for discharging air in the slag collecting device to maintain negative pressure in the slag collecting device.

[0011] In an optional embodiment, a negative pressure fan is provided in the negative pressure absorber, and a ventilation slot is provided through the outer wall of the negative pressure absorber, and the negative pressure fan is suitable for exhausting air to the outside through the exhaust slot.

[0012] In an optional embodiment, a stacking tank is provided at the bottom end of the slag collecting device, which is suitable for accommodating the accumulated coke slag;

[0013] The bottom end of the stacking tank is provided with a discharge port, and a sealing cover is detachably installed at the discharge port.

[0014] In an optional embodiment, a plurality of negative pressure fans are arranged at intervals in the negative pressure absorber.

[0015] In an optional embodiment, the cleaning tool is a cleaning brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of a circulating fluidized bed coking treatment device of the utility model;

[0018] Figure 2 It is a bottom-up schematic diagram of a circulating fluidized bed coking treatment device of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the cleaning device of the utility model;

[0020] Figure 4 It is a schematic diagram of the assembly of the negative pressure suction device and the slag suction channel of the utility model;

[0021] Figure 5 It is a schematic diagram of the internal structure of the negative pressure absorber of the utility model.

[0022] Description of reference numerals:

[0023] 1. Heat exchanger; 2. Cleaning device; 21. Shell; 23. Cleaning tool; 24. Pull rod; 25. Bottom ring; 26. Handle; 3. Slag suction channel; 4. Slag collecting device; 41. Exhaust slot; 42. Stacking tank; 43. Sealing cover; 5. Connecting arm; 51. Clamping claw; 6. Negative pressure absorber; 61. Negative pressure fan; 62. Ventilation slot; 63. Electric box. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0029] According to an embodiment of the utility model, a circulating fluidized bed coking treatment device is provided, comprising: a heat exchanger 1, a cleaning device 2, a slag suction channel 3 and a slag collection device 4; coking is generated at the outer peripheral wall of the heat exchanger 1; the cleaning device 2 comprises a shell 21 and a cleaning component, the shell 21 is sleeved around the outer periphery of the heat exchanger 1, and the cleaning component is slidably arranged at the inner peripheral wall of the shell 21; the cleaning component has a cleaning tool 23, a pull rod 24 and a bottom ring 25, the bottom ring 25 is slidably connected to the inner peripheral wall of the shell 21, the cleaning side of the cleaning tool 23 is in contact with the outer peripheral wall of the heat exchanger 1, the cleaning tool 23 can be a cleaning steel brush, the cleaning side is the part of the cleaning tool 23 used for cleaning, and can be the bristles of the cleaning steel brush; the brush of the cleaning steel brush The bristles abut against the outer wall of the heat exchanger 1 and are used to brush off coke. The handle of the cleaning steel brush is fixed at the bottom ring 25; one end of the pull rod 24 is fixed to the bottom ring 25, and the other end passes through the shell 21 and extends to the outside. By dragging the pull rod 24, the bottom ring 25 drives the cleaning steel brush to move, and the bristles of the cleaning steel brush remove and peel off the coke; one end of the slag suction channel 3 is connected to the bottom of the cleaning device, and the other end is connected to the slag collecting device 4. A negative pressure absorber 6 is provided in the slag suction channel 3, which is used to suck out the coke slag fallen off in the cleaning device and send it into the slag collecting device 4; an accumulation tank 42 is provided at the bottom end of the slag collecting device 4, and the coke slag is temporarily accommodated in the accumulation tank 42. The bottom end of the accumulation tank 42 has a discharge port, and a sealing cover 43 is detachably installed at the discharge port.

[0030] It should be noted that a plurality of cleaning tools 23 are fixed at intervals on the bottom ring 25 and are evenly spaced along the circumference of the heat exchanger 1 .

[0031] The specific working process of the circulating fluidized bed coking treatment device is as follows: the heat exchanger 1 is used for heat exchange. During the working process of the heat exchanger 1, coking will be formed on the outer wall surface of the heat exchanger 1, which affects the working efficiency of the heat exchanger 1 and needs to be removed; the operator grasps the pull rod 24 exposed to the outside and drags it up and down along the axial direction of the heat exchanger 1 and / or rotates the pull rod 24 left and right along the circumference of the heat exchanger 1. The pull rod 24 drives the bottom ring 25 to move, so that the cleaning tool 23 moves up and down along the axial direction of the heat exchanger 1 and / or rotates left and right along the circumference of the heat exchanger 1. The cleaning side of the cleaning tool 23 is tightly attached to the outer surface of the heat exchanger 1. The cleaning tool 23 can be a cleaning steel The bristles of the cleaning steel brush are pressed against the outer peripheral surface of the heat exchanger 1, and the movement of the cleaning steel brush is driven by the pull rod 24 to brush off the coke, and the coke slag falls off at the bottom of the cleaning device 2; one end of the slag suction channel 3 is connected to a position close to the bottom of the cleaning device 2, and a negative pressure absorber 6 is provided in the slag suction channel 3, so that the fallen coke slag is sucked into the slag suction channel 3; the other end of the slag suction channel 3 is connected to the slag collecting device 4, and the coke slag in the slag suction channel 3 is discharged into the slag collecting device 4; the coke slag falls into the accumulation tank 42 of the slag collecting device 4 for temporary collection and storage; the sealing cover 43 at the bottom of the accumulation tank 42 can be opened later to take out the coke slag, completing the thorough removal of the coke from the heat exchanger 1.

[0032] Furthermore, for coking at different positions on the surface of the heat exchanger 1, the operator controls the cleaning tool 23 to move to the corresponding position with the help of the pull rod 24 to accurately brush off the coking, which has strong practical performance.

[0033] Optionally, a handle 26 is provided at one end of the pull rod 24 extending to the outside, for assisting an operator in grasping the pull rod 24 .

[0034] In this embodiment, the pull rod 24 and the cleaning tool 23 are both fixed at the bottom ring 25, the cleaning tool 23 is closely attached to the outer peripheral surface of the heat exchanger 1, and the top end of the pull rod 24 passes through and extends to the external setting of the cleaning device 2, forming a coking removal structure that can be freely controlled and moved by the operator, which effectively removes the coking attached to the outer peripheral surface of the heat exchanger 1. At the same time, a slag suction channel 3 and a slag collection device 4 are also provided to completely remove the fallen coke slag, and the double-angle action can achieve the complete removal of the circulating fluidized bed generated during operation. The purpose of coking is to ensure that the heat exchanger 1 is always in an excellent working condition, prevent coking from affecting the heat exchange efficiency, and achieve a transition in the overall working performance of the circulating fluidized bed; for coking at different positions on the surface of the heat exchanger 1, the operator uses the pull rod 24 to control the cleaning tool 23 to move to the corresponding position to accurately brush off the coking, which is easy to use and has strong practical performance; the cleaning device 2, the slag suction channel 3 and the slag collection device 4 cooperate to respectively play the role of removing coking, transferring coke slag, and storing coke slag, and completely remove the coking on the surface of the heat exchanger 1, with strong practical performance.

[0035] In some embodiments, in combination Figure 1 As shown, the circulating fluidized bed coking treatment device also includes a clamping arm 5, one end of which is fixed to the slag collecting device 4, and the other end is fixed with a claw 51, and the claw 51 is clamped on the outer periphery of the heat exchanger 1 to make the slag collecting device 4 and the heat exchanger 1 detachably connected together, so as to facilitate the smooth progress of the slag collecting process.

[0036] In some embodiments, in combination Figure 1 and Figure 5 As shown, an exhaust slot 41 is provided at the top of the slag collecting device 4, and a filter screen is covered on the inner surface of the slag collecting device 4 near the exhaust slot 41; the negative pressure absorber 6 is arranged in the slag suction channel 3, and a negative pressure fan 61 is provided in the negative pressure absorber 6, and a ventilation slot 62 is penetrated through the outer wall of the negative pressure absorber 6, and the negative pressure fan 61 drives the air flow in the slag collecting channel and the slag collecting device 4, and the air is discharged to the outside through the exhaust slot 41 at the top of the slag collecting device 4, so that the slag collecting device 4 maintains a negative pressure state, and at the same time, the air in the slag collecting channel flows from the side close to the cleaning device 2 to the side close to the slag collecting device 4, so that the coke slag at the bottom of the cleaning device 2 is sucked into the slag suction channel 3 and brought into the slag collecting device 4 by the air, thereby completing the coke slag collection work.

[0037] In some embodiments, in combination Figure 5 As shown, a plurality of negative pressure fans 61 are arranged at intervals in the negative pressure absorber 6 , and the plurality of negative pressure fans 61 are connected to an electric box 63 by means of electric wires, and the electric box 63 supplies power to the negative pressure fans 61 .

[0038] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the present utility model.

Claims

1. A circulating fluidized bed coking treatment device, characterized in that: include: A heat exchanger (1) has coking generated on its peripheral wall; A cleaning device (2) comprises a shell (21) and a cleaning component, wherein the shell (21) surrounds and sleeves the outer circumference of the heat exchanger (1), and the cleaning component is slidably arranged on the inner circumferential wall of the shell (21); The cleaning assembly comprises a cleaning tool (23) and a pull rod (24); the cleaning side of the cleaning tool (23) abuts against the outer peripheral wall of the heat exchanger (1); one end of the pull rod (24) is fixed to the cleaning assembly, and the other end passes through the shell (21) and extends to the outside, and is suitable for dragging the pull rod (24) to move the cleaning assembly, so that the cleaning tool (23) removes and peels off the coke; A slag suction channel (3) is connected at one end to the bottom of the cleaning device (2) and at the other end to the slag collecting device (4). A negative pressure suction device (6) is provided in the slag suction channel (3) and is suitable for sucking out the coke slag that falls off from the cleaning device (2) and sending it into the slag collecting device (4).

2. The circulating fluidized bed coking treatment device according to claim 1, characterized in that: The cleaning assembly further comprises: a bottom ring (25), the bottom ring (25) being slidably connected to the inner circumferential wall of the shell (21), the cleaning tool (23) being fixed to the bottom ring (25), one end of the pull rod (24) being fixed to the bottom ring (25), and the other end penetrating the shell (21) and extending to the outside.

3. The circulating fluidized bed coking treatment device according to claim 1, characterized in that: Also includes: Card connection An arm (5), one end of the clamping arm (5) is fixed to the slag collecting device (4), and the other end is fixed with a clamping claw (51), the clamping claw (51) is clamped on the outer periphery of the heat exchanger (1), and is suitable for detachably connecting the slag collecting device (4) to the heat exchanger (1).

4. The circulating fluidized bed coking treatment device according to claim 1, characterized in that: A plurality of the cleaning tools (23) are arranged at even intervals along the circumference of the heat exchanger (1).

5. The circulating fluidized bed coking treatment device according to claim 1, characterized in that: An exhaust slot (41) is provided on the top of the slag collecting device (4), and the negative pressure absorber (6) is suitable for sucking air and discharging it from the exhaust slot (41), so as to maintain a negative pressure in the slag collecting device (4).

6. The circulating fluidized bed coking treatment device according to claim 5, characterized in that: A negative pressure fan (61) is arranged inside the negative pressure absorber (6), and a ventilation slot (62) is provided through the outer wall of the negative pressure absorber (6). The negative pressure fan (61) is suitable for exhausting air to the outside through the exhaust slot (41).

7. The circulating fluidized bed coking treatment device according to claim 1, characterized in that: The bottom end of the slag collecting device (4) is provided with a stacking tank (42) suitable for accommodating the stacked coke slag; The bottom end of the stacking tank (42) is provided with a discharge port, and a sealing cover (43) is detachably mounted on the discharge port.

8. The circulating fluidized bed coking treatment device according to claim 6, characterized in that: A plurality of negative pressure fans (61) are arranged at intervals in the negative pressure absorber (6).

9. The circulating fluidized bed coking treatment device according to claim 1, characterized in that: A handle (26) is provided at one end of the pull rod (24) extending to the outside.

10. The circulating fluidized bed coking treatment device according to claim 1, characterized in that: The cleaning tool (23) is a cleaning brush.

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