Spiral ash conveying device

Abstract

A spiral ash conveying device comprises a first installation frame, a second installation frame is arranged beside the first installation frame, a fly ash storage bin is installed in the first installation frame, a discharging port of the fly ash storage bin is communicated with an ash discharging valve, the ash discharging valve is communicated with a spiral conveyor, and a first outlet of the spiral conveyor is communicated with existing stirring and chelating treatment equipment. The screw conveyor extends out of the first mounting frame and is supported on the second mounting frame, a second outlet of the conveying tail end is provided with an ash conveying sleeve section, the ash conveying sleeve section comprises an inner ash outlet section and an outer ring dust collection section which are sleeved inside and outside and both communicated with the bulk machine, the outer ring dust collection section is communicated with a dust remover for negative pressure dust collection, and the bottom of the dust remover is communicated with the screw conveyor. According to the spiral ash conveying device, existing equipment does not need to be changed too much, meanwhile, raw ash can be conveyed, and generated flying dust can be filtered and recycled.

Description

Technical Field

[0001] This utility model relates to the field of raw ash treatment technology in waste incineration power plants, and more specifically, to a spiral ash conveying device. Background Technology

[0002] Currently, the fly ash from waste-to-energy incineration plants is mostly treated by chelating it with a chelating agent using a mixing device. This requires both additional mixing equipment and chelation treatment processes for the waste-to-energy plant. Directly dismantling the existing mixing equipment and chelation components would require a significant overall overhaul and could easily lead to waste.

[0003] Therefore, it is necessary to design and conceive a comprehensive ash conveying device that can not only perform the original chelation treatment, but also transport the raw ash to other locations for disposal by resource utilization units.

[0004] Meanwhile, how to effectively handle the dust generated during the raw ash conveying process to facilitate packaging is also a design consideration. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes a spiral ash conveying device that can retain the original chelation treatment, carry out raw ash conveying, and effectively treat dust generated during raw ash conveying.

[0006] This utility model proposes a spiral ash conveying device, including a first mounting frame, a second mounting frame on the side of the first mounting frame, a fly ash storage bin on the top of the first mounting frame for raw ash to be collected from the top, the fly ash storage bin having a discharge port at the bottom, the discharge port being connected to an ash discharge valve for controlling the amount of ash discharged, the ash discharge valve being connected to a spiral conveyor, the spiral conveyor having a first outlet at the beginning of the conveying process, the first outlet being connected to existing mixing and chelation treatment equipment, the conveying end of the spiral conveyor extending out of the first mounting frame and supported on the second mounting frame, the conveying end having a second outlet, the second outlet having an ash conveying sleeve section, the ash conveying sleeve section including an inner ash discharge section and an outer ring dust suction section, both connected to a bulk loader, the outer ring dust suction section also being connected to a negative pressure dust collector, the dust collector having a fan generating negative pressure, a filter bag for filtering dust, and a pulse blowing device for blowing the filtered dust to the bottom of the dust collector, the bottom of the dust collector being connected to the spiral conveyor.

[0007] As a further embodiment of this utility model, the inner ash discharge section includes an ash conveying straight pipe section connected to the second outlet and an inner ash discharge pipe connected to the ash conveying straight pipe section. The inner ash discharge pipe is connected to the bulk loader to output the raw ash. The outer ring dust suction section includes an outer dust suction pipe sleeved outside the inner ash discharge pipe. The outer dust suction pipe and the inner ash discharge pipe form an annular dust suction channel. The outer dust suction pipe is connected to the bulk loader to suck the dust into the annular dust suction channel.

[0008] As a further embodiment of this utility model, the annular dust collection channel has an annular bottom opening for dust to flow into the dust collection channel along the annular bottom opening. The top end of the outer dust collection pipe and the top end of the inner dust outlet pipe form a seal. A connection hole is provided on the side wall of the outer dust collection pipe. A dust collection pipe is connected between the dust collector and the outer dust collection pipe, and the dust collection pipe is connected to the connection hole of the outer dust collection pipe.

[0009] As a further embodiment of this utility model, the bulk loading machine is equipped with an outlet expansion joint, and both the inner ash discharge pipe and the outer dust suction pipe extend into the outlet expansion joint. The expansion and contraction characteristics of the outlet expansion joint can be used to adapt to tank trucks of different heights.

[0010] As a further embodiment of this utility model, a weighing chamber is connected between the ash discharge valve and the screw conveyor, and expansion joints are connected between the weighing chamber and the ash discharge valve, as well as between the weighing chamber and the screw conveyor.

[0011] As a further embodiment of this utility model, the second mounting frame is provided with a first climbing platform, the second climbing platform on the first mounting frame at the weighing and metering chamber extends downward at an angle to reach the middle position of the first climbing platform, and the third climbing platform on the first mounting frame at the mixer of the chelation treatment equipment extends upward at an angle to reach the edge of the first climbing platform.

[0012] As a further embodiment of this utility model, a third ladder is inclinedly provided between the second ladder platform and the third ladder platform, and the top of the third ladder is connected to the outer edge of the second ladder platform, and the bottom of the third ladder is connected to the inner edge of the third ladder platform.

[0013] The spiral ash conveying device of this utility model, through the coordinated arrangement of a spiral conveyor, an ash conveying sleeve section, and a dust collector, can convey raw ash without modifying existing mixing and chelation treatment equipment. Furthermore, under the action of the dust collector, the dust generated during the conveying of raw ash can be filtered and then re-enter the spiral conveyor to be conveyed together with the raw ash. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the spiral ash conveying device of this utility model;

[0015] Figure 2 for Figure 1 Enlarged structural diagram at point A in the diagram;

[0016] Figure 3 for Figure 1 Enlarged structural diagram at point B in the diagram;

[0017] Figure 4 This is a schematic diagram showing a partial cross-section of the ash conveying sleeve section of the spiral ash conveying device of this utility model.

[0018] As shown in the figures of this utility model:

[0019] 1. First mounting frame; 2. Second mounting frame; 3. Fly ash storage bin; 3. Discharge port; 4. Slide valve; 5. Rotary rotary valve; 6. Weighing bin; 7. Screw conveyor; 7. First outlet; 7. Second outlet; 7. Expansion joint; 8. Mixing and chelation treatment equipment; 9. Ash conveying sleeve section; 10. Inner ash discharge section; 10. Ash conveying straight pipe section; 10. Inner ash discharge pipe; 10. Outer ring dust collection section; 10. Outer dust collection pipe; 10. Bulk loader; 11. Dust collector; 12. Fan; 12. Bag filter; 12. Pulse blowing device; 12. Annular dust collection channel; 13. Bottom opening; 13. Dust collection pipe; 14. Outlet expansion joint; 15. First climbing platform; 16. Second climbing platform; 17. First climbing platform; 18. Third climbing platform; 19. Second climbing platform; 20. Third climbing platform; 21. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0023] If the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0024] like Figures 1 to 4 As shown, this is a spiral ash conveying device of the present invention, including a first mounting frame 1 and a second mounting frame 2 on the side of the first mounting frame 1. A fly ash storage bin 3 is installed on the top of the first mounting frame 1 for raw ash to be collected from its top. In this embodiment, the first mounting frame 1 is a frame structure, and the fly ash storage bin 3 is loaded from the top of the first mounting frame 1. The fly ash storage bin 3 has a cylindrical bin structure and a conical bottom, so that the fly ash storage bin 3 can be connected to the top of the first mounting frame 1 through an annular connecting plate (not shown) at the bottom of the cylindrical bin structure.

[0025] The fly ash storage silo 3 has a discharge port 3-1 located at the bottom, and a slide gate valve 4 is installed at the discharge port 3-1. The slide gate valve 4 is used to open or close the discharge port 3-1. Simultaneously, to effectively control the ash discharge volume, the slide gate valve 4 is connected to a rotary valve 5, which effectively controls the ash discharge volume. In this embodiment, the ash discharge volume needs to be weighed; therefore, a weighing and metering bin 6 is provided below the rotary valve 5. The raw ash entering the weighing and metering bin 6 is weighed for quantitative delivery.

[0026] In this embodiment, a screw conveyor 7 is also provided below the weighing and metering bin 6, which is used for screw conveying of raw ash.

[0027] Considering that the weighing bin 6 should not be affected by the upper star-shaped ash discharge valve 5 and the lower screw conveyor 7 during weighing, in this embodiment, expansion joints 8 are connected between the weighing bin 6 and the star-shaped ash discharge valve 5, and between the weighing bin 6 and the screw conveyor 7. The expansion joint 8 is a flexible structural component, so that during weighing, the weight of the star-shaped ash discharge valve 5 above the weighing bin 6 and the screw conveyor 7 below will not interfere with the weight of the weighing bin 6 and the original ash inside it.

[0028] In this embodiment, to minimize modifications to the existing mixing and chelation treatment equipment 9, the screw conveyor 7 has a first outlet 7-1 at the beginning of the conveying process. This first outlet 7-1 is connected to the existing mixing and chelation treatment equipment 9. The conveying end of the screw conveyor 7 extends out of the first mounting frame 1 and is supported on the second mounting frame 2. The conveying end of the screw conveyor 7 has a second outlet 7-2, and the second outlet 7-2 is equipped with an ash conveying sleeve section 10. The ash conveying sleeve section 10 includes... The dust collector 10-1 consists of an inner ash discharge section 10-1 and an outer ring dust collection section 10-2, both of which are connected to the bulk loader 11. The outer ring dust collection section 10-2 is also connected to a dust collector 12 with negative pressure suction. The dust collector 12 has a fan 12-1 that generates negative pressure, a precision filter bag 12-2 that filters dust, and a pulse blowing device 12-3 that blows the filtered dust to the bottom of the dust collector 12. The bottom of the dust collector 12 is connected to a screw conveyor 7, thereby sending the dust at the bottom into the screw conveyor 7 for conveying out.

[0029] In practical use, when existing chelation treatment is required, the existing stirring and chelation treatment equipment 9 can still be used. When raw ash treatment is required, the screw conveyor 7 can be used to transport the raw ash, and the dust can be treated by the vacuum cleaner 12 and the filtered dust can be recovered.

[0030] The inner ash discharge section 10-1 includes an ash conveying straight pipe section 10-1-1 connected to the second outlet 7-2 and an inner ash discharge pipe 10-1-2 connected to the ash conveying straight pipe section 10-1-1. The inner ash discharge pipe 10-1-2 is connected to the bulk loader 11 to convey raw ash into the bulk loader 11. The outer ring dust suction section 10-2 includes an outer dust suction pipe 10-2-1 sleeved outside the inner ash discharge pipe 10-1-2. The outer dust suction pipe 10-2-1 and the inner ash discharge pipe 10-1-2 form an annular dust suction channel 13. The outer dust suction pipe 10-2-1 is also connected to the bulk loader 11 to suck dust into the annular dust suction channel 13. With this setup, dust will be generated during the raw ash conveying process, especially after the raw ash comes out of the inner ash outlet pipe 10-1-2. At this time, under the suction force of the fan 12-1 that generates negative pressure, the dust will be sucked into the annular dust suction channel 13, while the raw ash, due to its certain gravity, will not be sucked away by the suction force and will continue to fall into the bulk loading machine.

[0031] Furthermore, the annular dust collection channel 13 has an annular bottom opening 13-1 for dust to flow into the annular dust collection channel 13 along the annular bottom opening 13-1. The top end of the outer dust collection pipe 10-2-1 is closed to the top end of the inner dust outlet pipe 10-1-2. A connecting hole is provided on the side wall of the outer dust collection pipe 10-2-1. A dust collection pipe 14 is connected between the dust collector 12 and the outer dust collection pipe 10-2-1, and the dust collection pipe 14 is connected to the connecting hole of the outer dust collection pipe 10-2-1. Thus, the dust entering the annular dust collection channel 13 enters the dust collector 12 through the dust collection pipe 14.

[0032] It should be noted that, due to the different heights of various tank trucks (not shown), the bulk loading machine 11 is equipped with an outlet expansion joint 15. The inner ash discharge pipe 10-1-2 and the outer dust suction pipe 10-2-1 both extend into the outlet expansion joint 15, and the lower end of the outlet expansion joint 15 is connected to the tank truck. Thus, when matching tank trucks of different heights for ash transportation, the presence of the outlet expansion joint 15 allows for adaptation to different tank truck heights.

[0033] Considering that the staff needs to reach the second mounting frame 2 on the side from the first mounting frame 1, in this embodiment, it is achieved in the following way: the second mounting frame 2 is provided with a first climbing platform 16, the second climbing platform 17 on the first mounting frame 1 at the weighing and metering chamber 6 extends downward at an angle to reach the first climbing platform 16 near the middle position of the first climbing platform 18, and the third climbing platform 19 on the first mounting frame 1 at the mixer of the mixing and chelation treatment equipment 9 extends upward at an angle to reach the edge of the first climbing platform 16 of the second climbing platform 20.

[0034] Meanwhile, in order to enable staff to move between the second ladder platform 17 and the third ladder platform 19 of the first mounting frame 1, a third ladder 21 is inclined between the second ladder platform 17 and the third ladder platform 19, and the top of the third ladder 21 is connected to the outer edge of the second ladder platform 17, and the bottom of the third ladder 21 is connected to the inner edge of the third ladder platform 19.

[0035] This utility model's screw conveyor for transporting raw ash uses a screw conveyor to transport the raw ash, while a dust collector filters and recovers the dust generated during the transport process, returning it to the screw conveyor. Existing mixing and chelation equipment requires minimal modification; by setting a first outlet at the beginning of the screw conveyor and connecting the mixing and chelation equipment to this outlet, the existing chelation process can still be performed.

[0036] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A spiral conveying device for ash conveying, comprising a first mounting frame, characterized in that: A second mounting frame is provided on the side of the first mounting frame. A fly ash storage bin is installed on the top of the first mounting frame for raw ash to be collected from its top. The fly ash storage bin has a discharge port at the bottom, which is connected to an ash discharge valve for controlling the amount of ash discharged. The ash discharge valve is connected to a screw conveyor. The screw conveyor has a first outlet at the beginning of the conveying process, which is connected to existing mixing and chelation treatment equipment. The conveying end of the screw conveyor extends out of the first mounting frame and is supported on the second mounting frame. The conveying end has a second outlet, which is equipped with an ash conveying sleeve section. The ash conveying sleeve section includes an inner ash discharge section and an outer ring dust suction section, both connected to the bulk loader, which are enclosed. The outer ring dust suction section is also connected to a negative pressure dust collector. The dust collector has a fan that generates negative pressure, filter bags for dust, and a pulse blowing device that blows the filtered dust to the bottom of the dust collector. The bottom of the dust collector is connected to the screw conveyor.

2. The spiral conveying device according to claim 1, characterized in that: The inner ash discharge section includes a straight ash conveying pipe section connected to the second outlet and an inner ash discharge pipe connected to the straight ash conveying pipe section. The inner ash discharge pipe is connected to the bulk loader to output the raw ash. The outer ring dust suction section includes an outer dust suction pipe sleeved outside the inner ash discharge pipe. The outer dust suction pipe and the inner ash discharge pipe form an annular dust suction channel. The outer dust suction pipe is connected to the bulk loader to suck the dust into the annular dust suction channel.

3. The spiral conveying device according to claim 2, characterized in that: The annular dust collection channel has an annular bottom opening for dust to flow into the dust collection channel along the annular bottom opening. The top of the outer dust collection pipe and the top of the inner dust discharge pipe form a seal. A connection hole is provided on the side wall of the outer dust collection pipe. A dust collection pipe is connected between the dust collector and the outer dust collection pipe, and the dust collection pipe is connected to the connection hole of the outer dust collection pipe.

4. The spiral conveying device according to claim 3, characterized in that: The bulk loading machine is equipped with an outlet expansion joint, and both the inner ash discharge pipe and the outer dust suction pipe extend into the outlet expansion joint.

5. The spiral conveying device according to claim 1, characterized in that: A weighing chamber is connected between the ash discharge valve and the screw conveyor. Expansion joints are connected between the weighing chamber and the ash discharge valve, as well as between the weighing chamber and the screw conveyor.

6. The spiral conveying device according to claim 5, characterized in that: The second mounting frame is provided with a first climbing platform. The second climbing platform on the first mounting frame at the weighing and metering chamber extends downward at an angle to reach the middle of the first climbing platform. The third climbing platform on the first mounting frame at the mixer of the chelation treatment equipment extends upward at an angle to reach the edge of the first climbing platform.

7. A spiral conveying device for ash conveying according to claim 6, characterized in that: A third ladder is inclined between the second ladder platform and the third ladder platform, and the top of the third ladder is connected to the outer edge of the second ladder platform, while the bottom of the third ladder is connected to the inner edge of the third ladder platform.

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