Fluidized bed furnace deslagging mechanism

Abstract

The utility model discloses a slag discharging mechanism of a fluidized bed furnace. The slag discharging mechanism comprises a furnace base, a driving motor and a slag discharging assembly. The driving motor is fixedly installed on the bottom face of the furnace base and used for driving the deslagging assembly to rotate on the inner side of the furnace base, and the deslagging assembly comprises a shaft rotating base, a paddle shaft rod and a lead screw motor. A bearing sleeve is fixedly installed on the inner side of the shaft rotating base, a lead screw motor is fixed to the top end of the bearing sleeve, and the output end of the lead screw motor is connected with a lead screw rotationally installed on the inner side of the bearing sleeve. According to the utility model, through an annular structure formed between the shaft rotating seat and the sliding ring guide groove, uniform receiving and efficient discharging of coal cinder are realized, the coal cinder accumulation phenomenon is avoided, and through the eccentric movement design of the linkage rod and the crank rod, the deflection angle of the screw rod sleeve is dynamically adjusted, so that the flexible adjustment of the size of the slag discharging hole in the furnace bottom and the control of the air inflow are realized. The device is reasonable in structural design and stable in operation, the deslagging efficiency and the equipment applicability are improved, and the device is suitable for coal cinder treatment of various fluidized bed furnaces.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fluidized bed furnace, concretely to a fluidized bed furnace slagging mechanism. BACKGROUND

[0002] In the conventional fluidized bed furnace slagging device, a fixed furnace bottom structure is usually adopted, and a plurality of fixed slagging holes are arranged on the furnace bottom. The coal ash is discharged to the discharge hopper by gravity to complete the slagging. The size of the slagging hole is fixed, and it cannot be flexibly adjusted according to the actual working condition. During the slagging process, the coal ash may be blocked or discharged unevenly. In addition, the fixed design of the slagging hole cannot effectively balance the sealing performance and the slagging efficiency of the furnace bottom, resulting in a decrease in thermal efficiency. At the same time, in order to realize the inclined discharge of the coal ash, the conventional technology usually relies on a scraper with a fixed inclination angle or a simple mechanical drive. However, these scrapers are easily damaged in the long-term high-temperature environment, and cannot realize efficient and reliable slagging.

[0003] However, the conventional technical solution has the following defects:

[0004] Insufficient sealing: The opening of the slagging hole of the conventional furnace bottom structure cannot be flexibly adjusted, which results in that the furnace bottom cannot be completely sealed during the discharge of the coal ash, affecting the normal operation efficiency of the fluidized bed furnace, and causing heat loss and increased energy consumption.

[0005] Low slagging efficiency: Due to the fixed slagging hole design, the coal ash cannot be uniformly discharged, and is easily accumulated or blocked. Moreover, the scraper or the mechanical structure with a fixed deflection angle cannot adapt to the complex coal ash flow requirements, causing poor slagging.

[0006] Insufficient adjustment capability: The size and inclination angle of the slagging hole of the conventional slagging device cannot be adjusted, and the size of the furnace bottom air inlet or the slagging hole cannot be flexibly controlled according to the actual slagging amount, which limits the coal ash treatment efficiency and the adjustment capability of the furnace bottom air inlet.

[0007] In summary, the conventional slagging device has significant deficiencies in sealing performance, slagging efficiency and flexible adjustment capability, and an innovative slagging mechanism that can realize good sealing performance, smooth slagging and flexible adjustment function is urgently needed to meet the needs of modern fluidized bed furnace operation. INVENTION CONTENTS

[0008] The utility model aims at solving the technical problems existing in the prior art or related technology.

[0009] This utility model provides a slag removal mechanism for a fluidized bed furnace, including a furnace base, a drive motor, and a slag removal assembly. The drive motor is fixedly installed on the bottom surface of the furnace base and is used to drive the slag removal assembly to rotate inside the furnace base. The slag removal assembly includes a shaft bearing, a paddle shaft, and a lead screw motor. A bearing sleeve is fixedly installed inside the shaft bearing, and the lead screw motor is fixed to the top of the bearing sleeve. The output end of the lead screw motor is connected to a lead screw rotatably installed inside the bearing sleeve. A lead screw sleeve is threaded onto the surface of the lead screw motor. A bearing seat is fixedly installed on the surface of the shaft bearing. One end of the paddle shaft passes through the bearing seat, and a crank rod is fixedly connected to the end of the paddle shaft. A connecting rod is provided on the surface of the lead screw sleeve and movably connected to the end of the crank rod. A paddle plate is fixedly installed on the surface of the paddle shaft. A slip ring guide groove is fixedly installed inside the furnace base, and one end of the paddle shaft is slidably installed inside the slip ring guide groove.

[0010] By adopting the above technical solution, the screw is driven by a screw motor to move downward on the surface of the screw, and through the cooperation of the connecting rod and the crank rod, the propeller shaft slides flexibly inside the slip ring guide groove, thereby realizing the dynamic adjustment of the slag discharge assembly and the efficient unloading of coal slag.

[0011] Furthermore, a discharge hopper is provided on one side of the furnace base, a discharge valve is provided on the surface of the discharge hopper, and the bottom surface of the inner cavity of the furnace base is inclined to the side of the discharge hopper.

[0012] By adopting the above technical solution, and by designing an inclined bottom structure in the inner cavity of the furnace base, the coal slag can be guided to flow towards the discharge hopper. Combined with the design of the discharge valve, the precise discharge of coal slag can be achieved.

[0013] In a preferred embodiment, the present invention can be further configured such that: the number of propeller shafts and propeller plates is several and they are evenly distributed in a circumferential direction on the outer periphery of the shaft bearing; the several propeller plates are all fan-shaped and combined to form a ring; and the inner diameter of the ring is equal to the outer diameter of the shaft bearing and the outer diameter of the ring is equal to the inner diameter of the slip ring guide groove.

[0014] By adopting the above technical solution, the uniform distribution of the propeller shaft and propeller plates around the circumference forms an integral circular slag discharge assembly, which effectively improves the uniformity of coal slag treatment and the slag discharge efficiency.

[0015] In a preferred embodiment, the present invention can be further configured such that: the top surface of the shaft bearing is provided with a protective cover, and the protective cover is a double-layer heat-insulating cover structure, and the lead screw motor and bearing seat are located inside the protective cover.

[0016] By adopting the above technical solution and using a double-layer heat insulation cover structure, the screw motor and bearing housing are effectively protected from high-temperature damage, thereby improving the operational safety and service life of the device.

[0017] In a preferred embodiment, the present invention can be further configured such that the connection point between the crank rod and the connecting rod is offset from the axis of the propeller shaft, and the two ends of the connecting rod are movably connected to the surfaces of the crank rod and the lead screw sleeve.

[0018] By adopting the above technical solution, the eccentric design of the crank and connecting rod enables the slag discharge assembly to achieve eccentric movement, which allows for flexible adjustment of the deflection angle of the screw sleeve, thereby realizing dynamic adjustment of the size of the slag discharge hole and the gas intake at the bottom of the furnace.

[0019] The beneficial effects achieved by this utility model are as follows:

[0020] 1. In this utility model, the circular furnace bottom plate structure formed between the shaft rotating seat and the slip ring guide groove realizes the uniform reception and sealing of the fluidized bed furnace slag, ensuring the sealing of the furnace bottom and the efficient treatment of slag. The deflection of the paddle shaft is realized through the coordinated action of the connecting rod and the crank rod, so that the slag is smoothly discharged under the inclined push of the screw sleeve surface, thereby improving the slag discharge efficiency.

[0021] 2. In this utility model, the connection point between the connecting rod and the crank rod is offset from the axis of the propeller shaft, thereby realizing eccentric motion drive. The deflection angle of the screw sleeve can be adjusted arbitrarily to adjust the size of the slag discharge hole at the bottom of the furnace and the air inlet at the bottom of the furnace. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the furnace base according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the slag discharge assembly structure according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the lead screw motor and lead screw sleeve structure according to an embodiment of the present invention.

[0026] Figure label:

[0027] 100. Furnace base; 110. Discharge hopper; 111. Discharge valve; 120. Slip ring guide groove; 200. Drive motor; 300. Slag discharge assembly; 310. Shaft pivot; 320. Paddle shaft; 330. Screw motor; 340. Screw sleeve; 311. Main shaft; 312. Bearing sleeve; 313. Bearing seat; 321. Crank rod; 331. Screw; 341. Connecting rod; 400. Paddle plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0029] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0030] The following is in conjunction with the appendix Figures 1-4 This invention describes a slag discharge mechanism for a fluidized bed furnace, provided by some embodiments of the present invention.

[0031] Example 1:

[0032] This utility model provides a slag removal mechanism for a fluidized bed furnace, including a furnace base 100, a drive motor 200, and a slag removal assembly 300. The drive motor 200 is fixedly installed on the bottom surface of the furnace base 100 and is used to drive the slag removal assembly 300 to rotate inside the furnace base 100. The slag removal assembly 300 includes a shaft bearing 310, a paddle shaft 320, and a lead screw motor 330. A bearing sleeve 312 is fixedly installed on the inner side of the shaft bearing 310, and the lead screw motor 330 is fixed to the top end of the bearing sleeve 312. The output end of the lead screw motor 330 is connected to a lead screw 331 rotatably installed inside the bearing sleeve 312. The screw motor 330 is threaded with a screw sleeve 340. A bearing seat 313 is fixedly mounted on the surface of the shaft bearing 310. One end of the propeller shaft 320 passes through the bearing seat 313, and a crank rod 321 is fixedly connected to the end of the propeller shaft 320. The surface of the screw sleeve 340 is provided with a connecting rod 341 that is movably connected to the end of the crank rod 321. A propeller plate 400 is fixedly mounted on the surface of the propeller shaft 320. A slip ring guide groove 120 is fixedly mounted on the inner side of the furnace base 100, and one end of the propeller shaft 320 is slidably mounted on the inner side of the slip ring guide groove 120.

[0033] To achieve the slag discharge function, a discharge hopper 110 is provided on one side of the furnace base 100. A discharge valve 111 is provided on the surface of the discharge hopper 110, and the bottom surface of the inner cavity of the furnace base 100 is inclined to one side of the discharge hopper 110 to guide the slag to be discharged into the discharge hopper 110. In addition, there are several paddle shafts 320 and paddle plates 400, which are evenly distributed in a circumferential direction on the outer periphery of the shaft bearing 310. The paddle plates 400 are all fan-shaped and combined to form a ring. The inner diameter of the ring is equal to the outer diameter of the shaft bearing 310, and the outer diameter of the ring is equal to the inner diameter of the slip ring guide groove 120.

[0034] During operation, the lead screw motor 330 drives the lead screw sleeve 340 to move up and down on the surface of the lead screw 331. Through the coordinated action of the connecting rod 341 and the crank rod 321, the paddle shaft rod 320 is deflected, causing the slag to slide from the surface of the paddle plate 400 to the discharge hopper 110 to complete the slag discharge.

[0035] Example 2:

[0036] Based on Embodiment 1, this embodiment further optimizes the protective structure of the shaft bearing 310 and the functional design of the slag discharge assembly. A protective cover is provided on the top surface of the shaft bearing 310. The protective cover is a double-layer heat-insulating cover structure used to protect the internal lead screw motor 330 and bearing seat 313. The double-layer structure contains heat-insulating material, further improving high-temperature resistance and ensuring stable operation of the equipment in high-temperature environments.

[0037] Furthermore, in this embodiment, the connection point between the connecting rod 341 and the crank rod 321 is offset from the axis of the propeller shaft 320, and the two ends of the connecting rod 341 are movably connected to the surfaces of the crank rod 321 and the lead screw sleeve 340, respectively. This design allows for flexible adjustment of the deflection angle of the lead screw sleeve 340 by adjusting the length and eccentricity of the connecting rod 341, thereby achieving dynamic control of the slag discharge hole size and the gas intake at the furnace bottom.

[0038] This embodiment also includes a slide rail structure on the inner side of the slip ring guide groove 120 to guide the sliding of the propeller shaft 320 during deflection, ensuring smoother operation of the slag discharge assembly. During operation, if slag becomes clogged or accumulates, it can be quickly cleared by adjusting the deflection angle of the connecting rod 341.

[0039] Technical effect description:

[0040] By forming an annular slag discharge assembly between the furnace base 100 and the shaft rotating seat 310, uniform reception and efficient discharge of coal slag are achieved, avoiding the accumulation of coal slag.

[0041] The double-layer heat-insulating cover effectively protects the lead screw motor 330 and bearing housing 313, improving the service life and operational safety of the equipment.

[0042] The eccentric motion design and dynamic adjustment function allow for flexible control of the slag discharge hole size and air intake volume according to requirements, improving the applicability and working efficiency of the equipment.

[0043] Working principle and usage process of this utility model:

[0044] Under normal conditions, the various slag discharge components 300 are assembled into a ring shape and arranged between the shaft bearing 310 and the slip ring guide groove 120 to form a furnace bottom plate structure for receiving slag from the fluidized bed furnace and sealing the bottom of the fluidized bed furnace. During the slag discharge operation, the lead screw motor 330 drives the lead screw sleeve 340 to move downward on the surface of the lead screw 331. The connecting rod 341 and the crank rod 321 drive the paddle shaft 320 and the lead screw sleeve 340 to deflect, so that the slag on the surface of the lead screw sleeve 340 is unloaded by deflecting the lead screw sleeve 340 to an inclined direction. Furthermore, the drive motor 200 drives the slag discharge component 300 to rotate as a whole, and the slag is discharged through the discharge hopper 110 under the push of the inclined lead screw sleeve 340.

[0045] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A slag discharge mechanism for a fluidized bed furnace, characterized in that, include: The furnace base (100), drive motor (200), and slag discharge assembly (300) are provided. The drive motor (200) is fixedly installed on the bottom surface of the furnace base (100) to drive the slag discharge assembly (300) to rotate inside the furnace base (100). The slag discharge assembly (300) includes a shaft bearing (310), a paddle shaft (320), and a lead screw motor (330). A bearing sleeve (312) is fixedly installed inside the shaft bearing (310), and the lead screw motor (330) is fixed to the top of the bearing sleeve (312). The output end of the lead screw motor (330) is connected to a lead screw (331) rotatably installed inside the bearing sleeve (312). (330) has a screw sleeve (340) threaded onto its surface. The bearing seat (313) is fixedly installed on the surface of the shaft bearing (310). One end of the propeller shaft (320) passes through the bearing seat (313), and the end of the propeller shaft (320) is fixedly connected to a crank rod (321). The surface of the screw sleeve (340) is provided with a connecting rod (341) that is movably connected to the end of the crank rod (321). The surface of the propeller shaft (320) is fixedly installed with a paddle plate (400). The inner side of the furnace base (100) is fixedly installed with a slip ring guide groove (120). One end of the propeller shaft (320) is slidably installed on the inner side of the slip ring guide groove (120).

2. The slag discharge mechanism for a fluidized bed furnace according to claim 1, characterized in that, A discharge hopper (110) is provided on one side of the furnace base (100), and a discharge valve (111) is provided on the surface of the discharge hopper (110). The bottom surface of the inner cavity of the furnace base (100) is inclined to the side of the discharge hopper (110).

3. The slag discharge mechanism for a fluidized bed furnace according to claim 1, characterized in that, The number of propeller shafts (320) and propeller plates (400) is several and they are evenly distributed in a circumferential direction on the outer periphery of the shaft swivel (310). The several propeller plates (400) are fan-shaped and combined to form a ring. The inner diameter of the ring is equal to the outer diameter of the shaft swivel (310), and the outer diameter of the ring is equal to the inner diameter of the slip ring guide groove (120).

4. The slag discharge mechanism for a fluidized bed furnace according to claim 1, characterized in that, The top surface of the shaft bearing (310) is provided with a protective cover, and the protective cover is a double-layer heat-insulating cover structure. The lead screw motor (330) and the bearing seat (313) are located inside the protective cover.

5. The slag discharge mechanism for a fluidized bed furnace according to claim 1, characterized in that, The connection point between the crank rod (321) and the connecting rod (341) is offset from the axis of the propeller shaft (320), and the two ends of the connecting rod (341) are movably connected to the surfaces of the crank rod (321) and the lead screw sleeve (340).

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