Ash bucket device and boiler system

Abstract

The utility model belongs to the technical field of ash processing, and discloses an ash bucket device and a boiler system.The ash bucket device comprises an ash bucket body, the ash bucket body comprises an inner shell, an outer shell and a guide plate, the inner shell is provided with a conveying channel, ash can flow through the conveying channel, the outer shell is arranged on the side, away from the conveying channel, of the inner shell in a sleeving mode, and the outer shell and the inner shell are arranged at intervals; a cavity is formed between the outer shell and the inner shell and surrounds the inner shell, air circulates in the cavity and is used for absorbing heat of ash in the conveying channel, the guide plate is arranged in the cavity and spirally surrounds the inner shell in the direction parallel to the circulating direction of the ash in the conveying channel, and the air can flow along the guide plate. According to the ash hopper device, ash in the conveying channel can be uniformly cooled, and the coking probability of the ash in the conveying process can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ash treatment, in particular to an ash hopper device and a boiler system. Background Art

[0002] The existing waste incineration boiler system usually uses a screw conveyor to transport ash. Due to the high temperature of the ash, the ash is easily coked into coke blocks in the screw conveyor. The coke blocks are stuck between the spiral blades of the screw conveyor or block the conveying channel of the screw conveyor, which will accelerate the wear of key components such as the spiral blades and bearings of the screw conveyor, thereby shortening the service life of the screw conveyor.

[0003] Secondly, after the ash is coked to form coke blocks, the screw conveyor needs a larger torque to overcome the resistance when running, thereby increasing the motor load of the screw conveyor. Long-term overload operation will shorten the life of the motor. In addition, the irregularly shaped coke blocks will cause the screw conveyor to produce greater vibration and noise during operation, affecting the smooth operation of the screw conveyor.

[0004] Thirdly, in order to ensure the smooth operation of the screw conveyor and extend its service life, the screw conveyor needs to be cleaned and repaired frequently, which wastes manpower and material resources and increases the maintenance cost of the waste incineration boiler system.

[0005] Therefore, it is urgent to propose a ash hopper device and a boiler system to solve the above technical problems. Utility Model Content

[0006] The first object of the utility model is to provide an ash hopper device, which can evenly cool the ash in the conveying channel, thereby greatly reducing the probability of coking of the ash during the conveying process.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The ash hopper device comprises an ash hopper body, and the ash hopper body comprises:

[0009] An inner shell, wherein the inner shell is provided with a conveying channel, and ash and slag can flow through the conveying channel;

[0010] An outer shell, which is sleeved on a side of the inner shell away from the conveying channel, the outer shell and the inner shell are spaced apart, a cavity is provided between the outer shell and the inner shell, the cavity surrounds the inner shell, and air flows in the cavity, and the air is used to absorb the heat of the ash in the conveying channel;

[0011] The guide plate is arranged in the cavity, parallel to the direction in which the ash flows in the conveying channel, and the guide plate spirally surrounds the inner shell, so that air can flow along the guide plate.

[0012] Optionally, an air inlet and an air outlet are provided on the shell, and air can enter the cavity through the air inlet and be discharged from the cavity through the air outlet. Along the flow direction of ash in the conveying channel, the air inlet is located at the downstream end and the air outlet is located at the upstream end.

[0013] Optionally, the ash hopper device further includes an air supply unit, which is connected to the cavity through an air inlet and is used to transport air to the cavity.

[0014] Optionally, the guide plate is arranged on the inner shell, and a side of the guide plate facing away from the inner shell is connected to the outer shell.

[0015] Optionally, a support member is further provided in the cavity, and two ends of the support member are respectively connected to the inner shell and the outer shell.

[0016] Optionally, there are multiple support members, and the multiple support members are evenly distributed in the cavity.

[0017] Optionally, the conveying channel is arranged in a vertical direction, the top of the conveying channel is an ash inlet, and the bottom of the conveying channel is an ash outlet.

[0018] Optionally, the conveying channel is funnel-shaped, and the ash inlet is a large-diameter end.

[0019] A second object of the utility model is to provide a boiler system with lower maintenance cost.

[0020] To achieve this purpose, the utility model adopts the following technical solutions:

[0021] A boiler system comprises the above-mentioned ash hopper device.

[0022] Optionally, the boiler system also includes a preheater and a combustion furnace, and an air inlet and an air outlet are provided on the outer shell. Air can enter the cavity through the air inlet and can be discharged from the cavity through the air outlet. The air outlet is connected to the air inlet of the preheater, and the air outlet of the preheater is connected to the combustion chamber of the combustion furnace.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides an ash hopper device, in which ash can flow through the conveying channel of the inner shell, that is, the conveying channel of the inner shell is used to convey ash, and a cavity surrounding the inner shell is provided between the inner shell and the outer shell, and air for absorbing the heat of the ash flows in the cavity, so as to achieve the effect of cooling the ash in the conveying channel and prevent the ash from coking; in addition, a guide plate is provided in the cavity, and the guide plate spirally surrounds the inner shell along a direction parallel to the flow of the ash in the conveying channel, so that the air in the cavity can spirally flow around the inner shell, so as to uniformly cool the ash in the conveying channel, and further reduce the probability of the ash coking. It can be seen that the ash hopper device can uniformly cool the ash in the conveying channel, greatly reducing the probability of the ash coking during the conveying process, and further reducing the wear of the coke blocks on the ash hopper body, thereby extending the service life of the ash hopper body and reducing the maintenance cost of the ash hopper body.

[0025] The boiler system provided by the utility model includes the above-mentioned ash hopper device, which can evenly cool the ash, greatly reducing the probability of ash coking in the conveying channel, thereby extending the service life of the ash hopper body and reducing the maintenance cost of the ash hopper body, which is beneficial to reducing the overall maintenance cost of the boiler system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the ash hopper body provided in this embodiment;

[0027] Figure 2 is a schematic diagram of the cross-sectional structure of the ash hopper body provided in this embodiment;

[0028] Figure 3 is a schematic diagram of the structure of the inner shell provided in this embodiment;

[0029] Figure 4 It is a schematic structural diagram of two ash hopper bodies provided in another embodiment.

[0030] In the figure:

[0031] 100, inner shell; 110, conveying channel; 111, ash inlet; 112, ash outlet; 200, outer shell; 210, air inlet; 220, air outlet; 300, cavity; 310, guide plate; 320, support member; 410, first closing plate; 420, second closing plate; 500, reinforcing rib; 610, first flange; 620, second flange; 700, connecting beam. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] This embodiment provides an ash hopper device, which can evenly cool the ash in the conveying channel, thereby greatly reducing the probability of ash coking during the conveying process.

[0037] Specifically, Figures 1 to 3As shown, the ash hopper device includes an ash hopper body, which includes an inner shell 100, an outer shell 200 and a guide plate 310, wherein the inner shell 100 is provided with a conveying channel 110, and ash can flow in the conveying channel 110, the outer shell 200 is sleeved on the side of the inner shell 100 away from the conveying channel 110, the outer shell 200 and the inner shell 100 are spaced apart, and a cavity 300 is provided between the outer shell 200 and the inner shell 100, the cavity 300 surrounds the inner shell 100, and air flows in the cavity 300, and the air is used to absorb the heat of the ash in the conveying channel 110, and the guide plate 310 is arranged in the cavity 300, and is parallel to the direction in which the ash flows in the conveying channel 110, and the guide plate 310 is spirally surrounded by the inner shell 100, and the air can flow along the guide plate 310.

[0038] Based on the above design, the ash can flow in the conveying channel 110 of the inner shell 100, that is, the conveying channel 110 of the inner shell 100 is used to convey the ash, and a cavity 300 surrounding the inner shell 100 is provided between the inner shell 100 and the outer shell 200, and air flows in the cavity 300, thereby achieving the effect of cooling the ash in the conveying channel 110 and avoiding the ash from coking; in addition, a guide plate 310 is provided in the cavity 300, and the guide plate 310 spirally surrounds the inner shell 100 in a direction parallel to the flow of ash in the conveying channel 110, so that the air in the cavity 300 can flow spirally around the inner shell 100 to balance the temperature field of the ash hopper body, uniformly cool the ash in the conveying channel 110, further reduce the probability of ash coking, and prevent material fatigue or damage caused by overheating of a local area of ​​the ash hopper body. It can be seen that the ash hopper device can evenly cool the ash in the conveying channel 110, greatly reducing the probability of ash coking during transportation, and further reducing the wear of the coke blocks on the ash hopper body, thereby extending the service life of the ash hopper body and reducing the maintenance cost of the ash hopper body.

[0039] It should be noted that the temperature of the ash is usually about 700° C., so the ash can be effectively cooled by introducing air at room temperature into the cavity 300 .

[0040] Optionally, the guide plate 310 is made of a heat-conducting material, thereby improving the heat exchange efficiency between the ash and the air, and further improving the cooling effect on the ash.

[0041] Alternatively, if Figures 1 to 3As shown, the conveying channel 110 is arranged in the vertical direction, the top of the conveying channel 110 is the ash inlet 111, and the bottom of the conveying channel 110 is the ash outlet 112. The ash enters the conveying channel 110 from the ash inlet 111 at the top of the conveying channel 110. Under the action of gravity, the ash can fall freely to the ash outlet 112 relatively smoothly, and then be discharged from the ash outlet 112. This structural design eliminates the power device for conveying ash, reduces energy consumption, and simplifies the overall structure of the ash hopper device. In addition, this design eliminates the mechanical moving parts for conveying ash, thereby improving the stability and reliability of the operation of the ash hopper device.

[0042] Furthermore, if Figures 1 to 3 As shown, the conveying channel 110 is funnel-shaped, and the ash inlet 111 is the large-diameter end, and the ash outlet 112 is the small-diameter end, that is, the channel wall of the conveying channel 110 is an inclined structure as a whole. This design can buffer the ash falling in the conveying channel 110, so that the ash can fall more smoothly from the ash inlet 111 to the ash outlet 112, thereby extending the heat exchange time between the ash and the air and improving the cooling effect on the ash.

[0043] In this embodiment, the delivery channel 110 is in the shape of a prismatic funnel. Of course, in other embodiments, the delivery channel 110 may also be in the shape of a cylindrical funnel, depending on actual usage requirements.

[0044] Alternatively, if Figures 1 to 3 As shown, the housing 200 is provided with an air inlet 210 and an air outlet 220, both of which are connected to the cavity 300. Air can enter the cavity 300 through the air inlet 210 and can be discharged from the cavity 300 through the air outlet 220. Along the flow direction of ash in the conveying channel 110, the air inlet 210 is located at the downstream end of the ash flow direction, and the air outlet 220 is located at the upstream end of the ash flow direction. In other words, the air in the cavity 300 flows in a spiral in the direction opposite to the ash flow direction. This design can improve the heat exchange efficiency between air and ash, thereby improving the cooling efficiency of the ash. In this embodiment, Figures 1 to 3 As shown, the ash flows in the conveying channel 110 from top to bottom, so the air in the cavity 300 flows upward in a spiral from bottom to top, so that the air can efficiently cool the ash.

[0045] Furthermore, the ash hopper device further includes an air supply unit (not shown in the figure), which is connected to the cavity 300 through the air inlet 210, and is used to deliver air to the cavity 300 to maintain the circulation of air in the cavity 300. Optionally, the air supply unit can be a standard air supply component commonly used in the art, such as a blower.

[0046] Alternatively, if Figures 1 to 3As shown, the guide plate 310 is arranged on the inner shell 100 , and the side of the guide plate 310 facing away from the inner shell 100 is connected to the outer shell 200 to ensure that the air can flow along the spiral direction of the guide plate 310 , thereby improving the guiding effect of the guide plate 310 on the air in the cavity 300 .

[0047] Alternatively, if Figures 1 to 3 As shown, a support member 320 is further provided in the cavity 300 , and two ends of the support member 320 are respectively connected to the inner shell 100 and the outer shell 200 to improve the structural strength of the ash hopper body and improve the connection strength and stability between the inner shell 100 and the outer shell 200 .

[0048] Furthermore, if Figures 1 to 3 As shown, there are multiple support members 320, for example, there may be ten, twenty or thirty support members 320, etc. The multiple support members 320 are evenly distributed in the cavity 300, so that the structural strength of the ash hopper body is relatively uniform.

[0049] Optionally, the support member 320 may be in a cylindrical, prismatic or sheet-like structure, which are not listed here one by one.

[0050] Alternatively, if Figures 1 to 3 As shown, the inner shell 100 and the outer shell 200 are made of plates such as steel plates. The outer shell 200 surrounds the outer side of the inner shell 100. A first sealing plate 410 is provided at the top of the cavity 300, and the two sides of the first sealing plate 410 are respectively connected to the top of the inner shell 100 and the top of the outer shell 200. A second sealing plate 420 is provided at the bottom of the cavity 300, and the two sides of the second sealing plate 420 are respectively connected to the bottom of the inner shell 100 and the bottom of the outer shell 200. The first sealing plate 410, the second sealing plate 420, the inner shell 100 and the outer shell 200 cooperate with each other to enclose the cavity 300 into a closed cavity.

[0051] Alternatively, if Figures 1 to 3 As shown, a reinforcing rib 500 is connected between the first sealing plate 410 and the side of the outer shell 200 facing away from the inner shell 100 to improve the strength and reliability of the connection between the first sealing plate 410 and the outer shell 200. Figures 1 to 3 As shown, a first flange is provided on the side of the first sealing plate 410 facing away from the conveying passage 110, so as to facilitate connecting the ash hopper body with other components through the first flange.

[0052] Alternatively, if Figures 1 to 3 As shown, a second flange 620 is provided on the side of the second sealing plate 420 facing the conveying passage 110 , so as to facilitate connecting the ash hopper body with other components through the second flange 620 .

[0053] It should be noted that the ash hopper device in this embodiment is provided with one ash hopper body. In other embodiments, the ash hopper bodies may be two or more. Figure 4 The structure of two ash hopper bodies is shown. The shells 200 of the two ash hopper bodies are connected by a connecting beam 700, and the two ash hopper bodies are connected to the same first flange 610, so that the two ash hopper bodies can be connected to other components as a whole.

[0054] This embodiment also provides a boiler system with lower maintenance cost.

[0055] Specifically, the boiler system includes the above-mentioned ash hopper device, which can evenly cool the ash, greatly reducing the probability of ash coking in the conveying channel 110, thereby extending the service life of the ash hopper body and reducing the maintenance cost of the ash hopper body, which is beneficial to reducing the overall maintenance cost of the boiler system.

[0056] Furthermore, the boiler system also includes a preheater and a combustion furnace, the air outlet 220 is connected to the air inlet of the preheater, and the air outlet of the preheater is connected to the combustion chamber of the combustion furnace, so as to achieve the effect of recovering the heat of ash and reducing greenhouse gas emissions. Specifically, the temperature of ash is usually about 700°C. In the ash hopper device, when the ash passes through the conveying channel 110, the heat is absorbed by the air circulating in the cavity 300, so that the temperature of this part of the air increases. After the part of the air is discharged from the cavity 300, it enters the preheater, and the preheater preheats (i.e., further heats) this part of the air to increase its temperature to the temperature of the combustion air required by the combustion furnace, and then this part of the air is discharged from the preheater through the air outlet of the preheater, and then enters the combustion chamber of the combustion furnace for combustion. That is to say, in the technical solution provided in this embodiment, the outside air is first passed into the cavity 300 of the ash hopper body to absorb heat, and then the air that has absorbed the heat of the ash is passed into the preheater for heating, and finally this part of the gas is transported to the combustion furnace. This design makes full use of the heat of the ash, reduces the energy consumption required for the preheater to preheat the air, and also avoids the problem of discharging the air that has absorbed the heat of the ash into the atmosphere.

[0057] Optionally, quick connectors are provided at the air inlet 210 and the air outlet 220 to facilitate quick connection of the air inlet 210 and the air outlet 220 to the connecting pipeline.

[0058] The ash hopper device and boiler system provided in this embodiment use an air supply unit to deliver room temperature air into the cavity 300 to efficiently cool the ash in the conveying channel 110, avoid the ash from coking in the conveying channel 110, reduce the wear of the ash hopper body, thereby reducing the failure rate of the ash hopper device and the maintenance cost of the ash hopper device, and at the same time can also increase the service life of the ash hopper device. The conveying channel 110 is arranged in a vertical direction, and the top of the dredging channel is the ash inlet 111, and the bottom of the conveying channel 110 is the ash outlet 112, so that the ash can fall freely in the conveying channel 110, eliminating the conveying mechanism for conveying ash, reducing energy consumption, and reducing mechanical moving parts. The reliability and stability of the overall operation of the ash hopper device are significantly improved. Compared with using water or other chemical coolants to cool the ash, using air to cool the ash reduces the impact on the environment and has the effect of protecting the environment. The air outlet 220 of the ash hopper body is connected to the preheater and the combustion furnace in sequence, so that the air discharged from the cavity 300 that absorbs the heat of the ash is further heated in the preheater, and then enters the combustion furnace for combustion, thereby realizing the recovery and utilization of the ash heat, which has the effect of reducing energy consumption and reducing greenhouse gas emissions.

[0059] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Ash hopper device, characterized in that: It includes an ash hopper body, and the ash hopper body includes: An inner shell (100), wherein the inner shell (100) is provided with a conveying channel (110), and ash can flow through the conveying channel (110); An outer shell (200), the outer shell (200) being sleeved on a side of the inner shell (100) away from the conveying channel (110), the outer shell (200) and the inner shell (100) being spaced apart, a cavity (300) being provided between the outer shell (200) and the inner shell (100), the cavity (300) surrounding the inner shell (100), air flowing in the cavity (300), the air being used to absorb heat from the ash in the conveying channel (110); A guide plate (310) is arranged in the cavity (300) and spirally surrounds the inner shell (100) in a direction parallel to the direction in which the ash flows in the conveying channel (110), so that the air can flow along the guide plate (310).

2. The ash hopper device according to claim 1, characterized in that: The housing (200) is provided with an air inlet (210) and an air outlet (220); the air can enter the cavity (300) through the air inlet (210) and can be discharged from the cavity (300) through the air outlet (220); along the flow direction of the ash in the conveying channel (110), the air inlet (210) is located at the downstream end, and the air outlet (220) is located at the upstream end.

3. The ash hopper device according to claim 2, characterized in that: The ash hopper device further comprises an air supply unit, the air supply unit being in communication with the cavity (300) via the air inlet (210), and the air supply unit being used to deliver the air to the cavity (300).

4. The ash hopper device according to any one of claims 1 to 3, characterized in that: The guide plate (310) is arranged on the inner shell (100), and a side of the guide plate (310) facing away from the inner shell (100) is connected to the outer shell (200).

5. The ash hopper device according to any one of claims 1 to 3, characterized in that: A support member (320) is also provided in the cavity (300), and two ends of the support member (320) are respectively connected to the inner shell (100) and the outer shell (200).

6. The ash hopper device according to claim 5, characterized in that: There are a plurality of support members (320), and the plurality of support members (320) are evenly distributed in the cavity (300).

7. The ash hopper device according to any one of claims 1 to 3, characterized in that: The conveying channel (110) is arranged in a vertical direction, the top of the conveying channel (110) is an ash inlet (111), and the bottom of the conveying channel (110) is an ash outlet (112).

8. The ash hopper device according to claim 7, characterized in that: The conveying channel (110) is funnel-shaped, and the ash inlet (111) is a large-diameter end.

9. A boiler system, characterized in that: The invention comprises the ash hopper device as described in any one of claims 1 to 8.

10. The boiler system according to claim 9, characterized in that: The boiler system further comprises a preheater and a combustion furnace. The shell (200) is provided with an air inlet (210) and an air outlet (220). The air can enter the cavity (300) through the air inlet (210) and can be discharged from the cavity (300) through the air outlet (220). The air outlet (220) is communicated with the air inlet of the preheater, and the air outlet of the preheater is communicated with the combustion chamber of the combustion furnace.

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