Ash conveying device

Abstract

The embodiment of the invention provides an ash conveying device. The ash conveying device comprises an ash conveying pipeline; the hoppers are arranged at intervals in the length direction of the ash conveying pipeline, and the hoppers are used for feeding the collected ash materials into the ash conveying pipeline; the at least two soot blowing devices are arranged on the soot conveying pipeline; the at least two soot blowing devices and the multiple hoppers are arranged in a staggered mode, and the soot blowing devices are used for blowing soot in the soot conveying pipeline into a soot silo at the discharging end of the soot conveying pipeline; wherein in the ash conveying direction of the ash conveying pipeline, the two adjacent ash blowing devices in the blocked area are controlled to generate a forward airflow pressure difference so as to dredge the blocked area in the ash conveying pipeline. According to the ash conveying pipeline, the ash fed into the ash conveying pipeline through the hopper is blown by the ash blowing devices, ash conveying in the whole ash conveying pipeline is controlled through the at least two ash blowing devices, and when one ash conveying pipeline is blocked, the two adjacent ash blowing devices in the blocked position form the forward airflow pressure difference in the length direction of the ash conveying pipeline so as to dredge the blocked area in the ash conveying pipeline.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of ash conveying, and specifically relate to an ash conveying device. Background Art

[0002] At present, the ash conveying system of power plant boiler adopts automatic ash conveying system. Compressed air is filled in the ash conveying pipeline, and the fluidity of compressed air is used to drive the boiler dust in the ash conveying pipeline to move towards the ash storage.

[0003] However, during the operation of the above-mentioned ash conveying system, the prior art transports the ash from the ash hopper to the ash conveying pipeline, closes the discharge port, and uses compressed air to provide a certain pressure to the ash conveying pipeline to transport the ash in the pipeline to the ash storage. At present, in case of ash conveying pipeline blockage, the staff manually checks the blockage position, and then clears the blockage position by knocking the pipeline, removing the flange to release the ash, and cutting the ash conveying pipeline. The maintenance cost is high, the maintenance efficiency is low, the maintenance method is dangerous, and it will cause serious environmental pollution.

[0004] Therefore, how to solve the above problems has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide an ash conveying device.

[0006] According to one aspect of an embodiment of the present disclosure, there is provided an ash conveying device, comprising: an ash conveying pipeline;

[0007] A plurality of hoppers are arranged at intervals along the length direction of the ash conveying pipeline, and the hoppers are used to put the collected ash into the ash conveying pipeline;

[0008] At least two soot blowing devices are arranged in the ash conveying pipeline; the at least two soot blowing devices are arranged alternately with the plurality of hoppers, and the soot blowing devices are used to blow the ash in the ash conveying pipeline to the ash bin at the discharge end of the ash conveying pipeline;

[0009] Wherein, along the ash conveying direction of the ash conveying pipeline, a positive airflow pressure difference is generated by controlling two adjacent soot blowing devices at the blocked area to clear the blocked area in the ash conveying pipeline.

[0010] Optionally, the sootblowing equipment includes a centrifugal fan, a drive motor and a belt;

[0011] The centrifugal fan comprises a housing and an impeller, the outer periphery of the housing is provided with convex teeth, the housing is coaxial with the ash conveying pipeline and is rotatably arranged, and the impeller is arranged inside the housing;

[0012] The belt is wound around the output shaft of the driving motor and the convex teeth to be meshed and connected with the output shaft of the driving motor and the convex teeth respectively;

[0013] The driving force output by the driving motor is transmitted to the centrifugal fan through the belt, so that the centrifugal fan rotates to generate a positive airflow.

[0014] Furthermore, it also includes a silo pump, the feed end of the silo pump is connected to the discharge port of the hopper, the discharge end of the silo pump is connected to the ash conveying pipeline, and the silo pump is used to transport the ash in the hopper to the ash conveying pipeline.

[0015] Furthermore, it also includes a discharge valve, which is arranged in the pipeline between the hopper and the ash conveying pipeline, and the discharge valve is used to control the flow rate and flow of the ash flowing out of the hopper.

[0016] Furthermore, it also includes a filter screen, which is arranged at the air inlet end of the ash conveying pipeline and is used to filter the air inlet of the ash conveying pipeline.

[0017] Furthermore, it also includes a sealing cover, which covers the centrifugal fan and is used to seal the centrifugal fan.

[0018] Furthermore, it also includes a dust removal device, which is arranged in the sealing cover and is used to remove dust in the sealing cover.

[0019] The beneficial effects of the embodiments of the present disclosure include:

[0020] In the present disclosure, the ash material sent into the ash conveying pipeline from the hopper is blown by the soot blowing equipment, and the ash conveying in the entire ash conveying pipeline is controlled by at least two soot blowing equipment. When the ash conveying pipeline is blocked at a certain place, the two adjacent soot blowing equipment at the blocked place form a positive airflow pressure difference along the length direction of the ash conveying pipeline to clear the blocked area in the ash conveying pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an ash conveying device according to an embodiment of the present disclosure;

[0022] Figure 2 It is a structural schematic diagram of a sootblowing device according to another embodiment of the present disclosure.

[0023] In the figure, 1. ash conveying pipeline; 2. hopper; 3. soot blowing equipment; 4. silo pump; 5. discharge valve; 6. filter; 31. centrifugal fan; 32. drive motor; 33. belt; 311. casing; 312. impeller; 313. convex teeth. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments. In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. is only for the convenience of describing the present application 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 a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the error tolerance range. "Parallel" is not parallel in the strict sense, but within the error tolerance range.

[0026] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0027] like Figure 1-2 As shown, an ash conveying device comprises an ash conveying pipeline 1, a plurality of hoppers 2 and at least two soot blowing devices 3. The plurality of hoppers 2 are arranged at intervals along the length direction of the ash conveying pipeline 1, and the hoppers 2 are used to put the collected ash into the ash conveying pipeline 1.

[0028] At least two soot blowing devices 3 are arranged in the ash conveying pipeline 1, and at least two soot blowing devices 3 are staggered with a plurality of hoppers 2. The soot blowing devices 3 are used to blow the ash material in the ash conveying pipeline 1 to the ash bin at the discharge end of the ash conveying pipeline 1; wherein, along the ash conveying direction of the ash conveying pipeline 1, a positive airflow pressure difference is generated by controlling two adjacent soot blowing devices 3 at the blocked area, so as to clear the blocked area in the ash conveying pipeline 1.

[0029] In the present disclosure, the ash material sent into the ash conveying pipeline 1 by the hopper 2 is blown by the soot blowing equipment 3, and the ash conveying in the entire ash conveying pipeline 1 is controlled by at least two soot blowing equipment 3. When the ash conveying pipeline 1 is blocked at a certain place, the two adjacent soot blowing equipment 3 at the blocked place form a positive airflow pressure difference along the length direction of the ash conveying pipeline 1 to clear the blocked area in the ash conveying pipeline 1.

[0030] In some embodiments, the soot blowing device 3 includes a centrifugal fan 31, a drive motor 32 and a belt 33. The centrifugal fan 31 includes a housing 311 and an impeller 312. The outer periphery of the housing 311 is provided with a convex tooth 313. The housing 311 is coaxial with the ash conveying pipeline 1 and is rotatably arranged. The impeller 312 is arranged inside the housing 311. The belt 33 is wound around the output shaft and the convex tooth 313 of the drive motor 32 to be meshed and connected with the output shaft and the convex tooth 313 of the drive motor 32 respectively. The driving force output by the drive motor 32 is transmitted to the centrifugal fan 31 through the belt 33, so that the centrifugal fan 31 rotates to generate a positive airflow.

[0031] In the present disclosure, the positive airflow pressure difference generated by the centrifugal fan 31 can effectively blow the ash in the ash conveying pipeline 1 to the discharge end of the ash conveying pipeline 1, thereby improving the conveying efficiency. In addition, by controlling the positive airflow pressure difference generated by two adjacent sootblowing devices 3, the blocked area in the ash conveying pipeline 1 can be effectively unblocked, thereby reducing the downtime caused by blockage. Furthermore, the sootblowing device 3 is compactly designed, and the combination of the centrifugal fan 31, the drive motor 32 and the belt 33 makes the entire system occupy a small space, which is suitable for installation and use in a limited space. In addition, the belt 33 transmission method is simple and reliable, and is easy to replace and maintain. At the same time, the housing 311 and the impeller 312 of the centrifugal fan 31 are designed to be easy to disassemble and clean, thereby reducing the difficulty and cost of maintenance.

[0032] In some embodiments, a silo pump 4 is further included, wherein the feed end of the silo pump 4 is connected to the discharge port of the hopper 2 , and the discharge end of the silo pump 4 is connected to the ash conveying pipeline 1 , and the silo pump 4 is used to convey the ash in the hopper 2 to the ash conveying pipeline 1 .

[0033] In the present disclosure, the silo pump 4 can quickly and efficiently transport the ash in the hopper 2 to the ash conveying pipeline 1 by pneumatic conveying, thereby improving the conveying efficiency of the entire system. The silo pump 4 can provide a stable airflow, which helps prevent the ash from being blocked during the conveying process, especially in long-distance conveying. In addition, the silo pump 4 can transport materials in a closed pipeline, reduce dust leakage, improve the working environment, and meet environmental protection requirements.

[0034] In some embodiments, a discharge valve 5 is further included. The discharge valve 5 is disposed in a pipeline between the hopper 2 and the ash conveying pipeline 1 . The discharge valve 5 is used to control the flow rate and flow rate of the ash flowing out of the hopper 2 .

[0035] In some embodiments, the discharge valve 5 is disposed in the pipeline between the hopper 2 and the silo pump 4 .

[0036] In the present disclosure, the discharge valve 5 can accurately control the flow rate and flow rate of the ash material flowing out of the hopper 2, ensuring that the material enters the silo pump 4 or the ash conveying pipeline 1 at a constant or adjustable rate, thereby improving the stability and controllability of the conveying process. The discharge valve 5 can also effectively prevent the ash material from flowing in reverse and maintain the normal operation of the system. In addition, the discharge valve 5 can be quickly closed in an emergency to prevent the material from flowing, thereby playing a role in safety protection.

[0037] In some embodiments, a filter screen 6 is further included. The filter screen 6 is disposed at the air inlet end of the ash conveying pipeline 1 and is used to filter the air inlet of the ash conveying pipeline 1 .

[0038] In the present disclosure, the filter 6 can effectively filter dust, particulate matter and other impurities in the air entering the ash conveying pipeline 1, thereby improving the quality of the air entering the ash conveying pipeline 1. By filtering out impurities in the air, the filter 6 can prevent these impurities from entering the ash conveying pipeline 1 and the soot blowing device 3, thereby extending the service life of the equipment and reducing maintenance requirements. In addition, the filtered clean air reduces the risk of blockage caused by impurities in the ash conveying pipeline 1, thereby improving the reliability and stability of the ash conveying device.

[0039] In some embodiments, a sealing cover is further included, and the sealing cover covers the centrifugal fan 31 and is used to seal the centrifugal fan 31 .

[0040] In the present disclosure, the sealing cover can effectively prevent dust or particles generated by the centrifugal fan 31 during operation from leaking out, reduce environmental pollution, improve the working environment, and also avoid the influence of the leaked dust on the drive motor 32. The sealing cover can also prevent external dust, moisture and other impurities from entering the interior of the centrifugal fan 31, thereby extending the service life of the equipment and reducing maintenance requirements.

[0041] In some embodiments, a dust removal device is further included. The dust removal device is disposed in the sealing cover and is used to remove dust in the sealing cover.

[0042] In the present disclosure, the dust removal device can effectively remove dust and particulate matter in the sealed cover, prevent these impurities from accumulating in the sealed cover, and keep the internal environment clean. By regularly cleaning the dust in the sealed cover, the dust removal device helps to maintain the optimal working state of the centrifugal fan 31, thereby improving the conveying efficiency and performance of the entire device. In addition, since the dust removal device can automatically or regularly perform dust removal processing, the need for manual cleaning is reduced, and the maintenance frequency and maintenance cost are reduced.

[0043] A specific example provided by the present disclosure includes:

[0044] A filter screen 6 is provided at the air inlet end of the ash conveying pipeline 1. When the driving motor 32 drives the centrifugal fan 31 to start, air is sucked in from the air inlet end. Five hoppers 2 are arranged at intervals along the length direction of the ash conveying pipeline 1, and three soot blowing devices 3 are also arranged on the ash conveying pipeline 1. The soot blowing devices 3 include centrifugal fans 31, wherein the first centrifugal fan 31 is arranged at the air inlet end of the ash conveying pipeline 1, the second centrifugal fan 31 is arranged between the second hopper 2 and the third hopper 2, and the third centrifugal fan 31 is arranged between the fourth hopper 2 and the fifth hopper 2.

[0045] The centrifugal fan 31 includes a housing 311 and an impeller 312 disposed inside the housing 311, and the impeller 312 and the housing 311 are of an integrated design. The housing 311 is coaxially disposed with the ash conveying pipeline 1, and the housing 311 and the ash conveying pipeline 1 are slidably connected via a roller. The outer peripheral side of the housing 311 is provided with a convex tooth 313, and the convex tooth 313 is meshedly connected with the output shaft of the driving motor 32 via a belt 33. The driving motor 32 drives the centrifugal fan 31 to rotate via the belt 33.

[0046] The impeller 312 has a preset curvature, so that the wind flows in a certain field to blow and transport the ash. A sealing cover is provided outside the centrifugal fan 31 to seal the centrifugal fan 31 .

[0047] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. An ash conveying device, characterized in that: include: Ash conveying pipeline; A plurality of hoppers are arranged at intervals along the length direction of the ash conveying pipeline, and the hoppers are used to put the collected ash into the ash conveying pipeline; At least two soot blowing devices are arranged on the soot conveying pipeline; The at least two soot blowing devices are arranged alternately with the plurality of hoppers, and the soot blowing devices are used to blow the soot in the soot conveying pipeline to the soot bin at the discharge end of the soot conveying pipeline; Wherein, along the ash conveying direction of the ash conveying pipeline, a positive airflow pressure difference is generated by controlling two adjacent soot blowing devices at the blocked area to clear the blocked area in the ash conveying pipeline.

2. The ash conveying device according to claim 1, characterized in that: The soot blowing equipment includes a centrifugal fan, a drive motor and a belt; The centrifugal fan comprises a housing and an impeller, the outer periphery of the housing is provided with convex teeth, the housing is coaxial with the ash conveying pipeline and is rotatably arranged, and the impeller is arranged inside the housing; The belt is wound around the output shaft of the driving motor and the convex teeth to be meshed and connected with the output shaft of the driving motor and the convex teeth respectively; The driving force output by the driving motor is transmitted to the centrifugal fan through the belt, so that the centrifugal fan rotates to generate a positive airflow.

3. An ash conveying device according to claim 1 or 2, characterized in that: It also includes a silo pump, the feed end of the silo pump is connected to the discharge port of the hopper, the discharge end of the silo pump is communicated with the ash conveying pipeline, and the silo pump is used to transport the ash in the hopper to the ash conveying pipeline.

4. An ash conveying device according to claim 1 or 2, characterized in that: It also includes a discharge valve, which is arranged in the pipeline between the hopper and the ash conveying pipeline, and is used to control the flow rate and flow of the ash flowing out of the hopper.

5. An ash conveying device according to claim 1 or 2, characterized in that: It also includes a filter screen, which is arranged at the air inlet end of the ash conveying pipeline and is used to filter the air inlet of the ash conveying pipeline.

6. The ash conveying device according to claim 2, characterized in that: It also includes a sealing cover, which covers the centrifugal fan and is used to seal the centrifugal fan.

7. The ash conveying device according to claim 6, characterized in that: It also includes a dust removal device, which is arranged in the sealing cover and is used to remove dust in the sealing cover.

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