CN210425006U - Furnace ash heat energy recovery structure, furnace ash treatment device and sludge incineration fluidized bed boiler - Google Patents
Furnace ash heat energy recovery structure, furnace ash treatment device and sludge incineration fluidized bed boiler Download PDFInfo
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- CN210425006U CN210425006U CN201920895138.0U CN201920895138U CN210425006U CN 210425006 U CN210425006 U CN 210425006U CN 201920895138 U CN201920895138 U CN 201920895138U CN 210425006 U CN210425006 U CN 210425006U
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Abstract
The utility model discloses a ashes heat recovery structure, ashes processing apparatus and sludge incineration fluidized bed boiler fall into the feed inlet in the furnace of boiler body as the ashes, start the air-blower, through the air guide pipe fitting, carry the air to the ash bucket in for air and ashes fully contact in the ash bucket, thereby make the ashes obtain effectively and stably cool down. The cooled furnace dust can continuously drop to the discharge opening under the action of gravity of the furnace dust and fall out from the discharge opening. The air after being heated can continue to be conveyed towards the feeding port, so that stable reverse convection heat transfer is realized between the air and the furnace dust, the heat transfer efficiency between the air and the furnace dust is improved, and the cooling effect of the furnace dust is favorably improved. Simultaneously, the air after being heated gets into in the furnace from feed inlet department to participate in the fuel combustion reaction in the furnace, so, make the heat that obtains in the follow ashes obtain effective recycle in the furnace, greatly improved the energy utilization in the ashes.
Description
Technical Field
The utility model relates to the technical field of boilers, especially, relate to a ashes heat recovery structure, ashes processing apparatus and sludge incineration fluidized bed boiler.
Background
In the combustion process of the sludge incineration boiler, combustion air enters the boiler through an air distribution system at the bottom, the air flows upwards, a certain air speed is controlled, and the acting force generated by air flow enables fuel and bed material particles to form a bed layer and perform stable combustion. Slag and impurities (generally called furnace ash) after fuel combustion are discharged out of the system after being cooled. Because the temperature of the burnt furnace dust is high, the system can not be directly removed, and the traditional sludge incineration boiler generally adopts a water-cooling spiral mode to cool the discharged furnace dust. Cooling water is introduced into a main shaft and a shell of the water-cooling spiral, and heat in the furnace dust is taken away through the cooling water. However, this technique usually causes fouling, resulting in damage due to lack of water inside the spiral, and thus, stable cooling of the ashes is not possible. Meanwhile, the cooling water of the water-cooling spiral usually directly takes away the heat, thereby causing serious waste of energy.
SUMMERY OF THE UTILITY MODEL
Accordingly, there is a need for a heat recovery structure for ash, an ash treatment apparatus, and a fluidized bed boiler for sludge incineration, which can stably cool the ash and effectively utilize energy in the ash.
The technical scheme is as follows:
a furnace dust heat energy recovery structure comprising: the ash hopper is provided with a feeding hole and a discharging hole, and the feeding hole is communicated with a hearth of the boiler body; and the air guide pipe fitting is arranged on the ash bucket, one end of the air guide pipe fitting is communicated with the interior of the ash bucket, and the other end of the air guide pipe fitting is communicated with the air blower.
Foretell ashes heat recovery structure falls into the feed inlet in the furnace of boiler body when the ashes, starts the air-blower, through the air guide pipe fitting, with air transport to the ash bucket for the air fully contacts with the ashes in the ash bucket, thereby makes the ashes obtain effectively and stably cooling. The cooled furnace dust can continuously drop to the discharge opening under the action of gravity of the furnace dust and fall out from the discharge opening. Because the discharge gate department of ash bucket accumulates a large amount of ashes, causes certain pressure to the flow of air, consequently, the air after being heated can continue to be carried towards the feed gate department, so for realize stable reverse convection current heat transfer between air and the ashes, improved the heat transfer efficiency between air and the ashes, thereby be favorable to improving the cooling effect of ashes. Simultaneously, the air after being heated gets into in the furnace from feed inlet department to participate in the fuel combustion reaction in the furnace, so, make the heat that obtains in the follow ashes obtain effective recycle in the furnace, greatly improved the energy utilization in the ashes.
The principle and effect of the present invention will be further explained by combining the above scheme:
in one embodiment, the furnace ash heat energy recovery structure further comprises a nozzle, the nozzle is arranged on the ash bucket, and the input end of the nozzle is communicated with the discharge hole.
In one embodiment, the ash bucket is provided with a closable valve, and the valve is used for overhauling the ash bucket.
In one embodiment, the cross-sectional area S in the ash hopper gradually decreases from the end of the ash hopper near the feed port to the end of the ash hopper near the discharge port.
The furnace dust treatment device comprises a conveying mechanism and the furnace dust heat energy recovery structure, wherein a discharge port is communicated with the input end of the conveying mechanism.
Foretell ashes processing apparatus adopts above ashes heat recovery structure, falls into the feed inlet in the furnace of boiler body when the ashes follow, starts the air-blower, through the air guide pipe fitting, with air transport to the ash bucket for air and ashes fully contact in the ash bucket, thereby make the ashes obtain effectively and stably cool down. The cooled furnace dust can continuously drop to the discharge opening under the action of gravity of the furnace dust, and drops out of the discharge opening to the conveying mechanism. Because the discharge gate department of ash bucket accumulates a large amount of ashes, causes certain pressure to the flow of air, consequently, the air after being heated can continue to be carried towards the feed gate department, so for realize stable reverse convection current heat transfer between air and the ashes, improved the heat transfer efficiency between air and the ashes, thereby be favorable to improving the cooling effect of ashes. Simultaneously, the air after being heated gets into in the furnace from feed inlet department to participate in the fuel combustion reaction in the furnace, so, make the heat that obtains in the follow ashes obtain effective recycle in the furnace, greatly improved the energy utilization in the ashes.
In one embodiment, the conveying mechanism comprises a conveying pipe and a vibration assembly, wherein a conveying port and a discharging port are formed in the conveying pipe, the conveying port is communicated with the discharging port, the vibration assembly is in transmission connection with the conveying pipe, and the vibration assembly is used for vibrating the conveying pipe.
In one embodiment, the conveying pipe is arranged obliquely, and one end of the conveying pipe close to the material conveying opening is lower than one end of the conveying pipe close to the material discharging opening.
In one embodiment, the ash treatment device further comprises a mounting structure, the mounting structure is arranged on the conveying pipe, and the vibration assembly is in transmission connection with the conveying pipe through the mounting structure.
In one embodiment, the ash treatment device further comprises a connecting rod structure and a support frame, and the mounting structure is in transmission connection with the support frame through the connecting rod structure.
The utility model provides a sludge incineration fluidized bed boiler, includes boiler body and above arbitrary one the ashes processing apparatus, boiler body's furnace with the feed inlet intercommunication sets up.
Foretell sludge incineration fluidized bed boiler adopts above ashes processing apparatus, falls into the feed inlet in the furnace of boiler body when the ashes from, starts the air-blower, through the air guide pipe fitting, with air transport to the ash bucket for air and ashes fully contact in the ash bucket, thereby make the ashes obtain effectively and stably cooling. The cooled furnace dust can continuously drop to the discharge opening under the action of gravity of the furnace dust and fall out from the discharge opening. Because the discharge gate department of ash bucket accumulates a large amount of ashes, causes certain pressure to the flow of air, consequently, the air after being heated can continue to be carried towards the feed gate department, so for realize stable reverse convection current heat transfer between air and the ashes, improved the heat transfer efficiency between air and the ashes, thereby be favorable to improving the cooling effect of ashes. Simultaneously, the air after being heated gets into in the furnace from feed inlet department to participate in the fuel combustion reaction in the furnace, so, make the heat that obtains in the follow ashes obtain effective recycle in the furnace, greatly improved the energy utilization in the ashes.
Drawings
Fig. 1 is a schematic view of a furnace ash heat energy recovery structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a conveying mechanism according to an embodiment of the present invention;
fig. 3 is an enlarged view of the structure at circle a in fig. 2.
Description of reference numerals:
100. the furnace dust heat energy recovery structure comprises a furnace dust heat energy recovery structure 110, an ash hopper 111, a feeding hole 112, a discharging hole 120, an air guide pipe fitting 130, a valve 140, a nozzle 200, a conveying mechanism 210, a conveying pipe 211, a material conveying hole 212, a discharging hole 213, a first material guide pipe fitting 214, a second material guide pipe fitting 220, a vibration assembly 221, an eccentric wheel 230, an installation structure 240, a connecting rod structure 241, a first connecting seat 242, a first connecting rod 243, a second connecting rod 244, a third connecting rod 245, a second connecting seat 250, a supporting frame 300 and furnace dust.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the present invention, the terms "first" and "second" do not denote any particular quantity or order, but are merely used to distinguish names.
In one embodiment, referring to fig. 1 and 2, a furnace ash heat energy recovery structure 100 includes: an ash hopper 110 and an air guide pipe 120. The ash bucket 110 is provided with a feed inlet 111 and a discharge outlet 112. The feed inlet 111 is used for communicating with a hearth of the boiler body. The air guide pipe 120 is disposed on the ash bucket 110, one end of the air guide pipe 120 is communicated with the ash bucket 110, and the other end of the air guide pipe 120 is communicated with the blower.
Above-mentioned ashes heat recovery structure 100, in the feed inlet 111 falls into in the furnace of boiler body from the ashes 300, start the air-blower, through air guide pipe 120, with air transport to the ash bucket 110 in for air and ashes 300 fully contact in ash bucket 110, thereby make ashes 300 obtain effectively and stably cool down. The cooled ash 300 will continuously drop to the discharge port 112 due to its own gravity, and will drop out from the discharge port 112. Because a large amount of furnace dust 300 is accumulated at the discharge port 112 of the dust hopper 110, and certain pressure is caused to the flowing of air, the heated air can be continuously conveyed towards the feed port 111, so that stable reverse convection heat transfer is realized between the air and the furnace dust 300, the heat transfer efficiency between the air and the furnace dust 300 is improved, and the cooling effect of the furnace dust 300 is favorably improved. Meanwhile, heated air enters the hearth from the feeding hole 111 and participates in fuel combustion reaction in the hearth, so that heat obtained from the furnace dust 300 is effectively recycled in the hearth, and the energy utilization rate of the furnace dust 300 is greatly improved. Compared with the prior art, the embodiment abandons the water-cooling scheme, fundamentally solves the problems of scaling and blockage of the water-cooling spiral, ensures the continuous operation of the sludge incineration fluidized bed boiler, and reduces the shutdown maintenance time of the sludge incineration fluidized bed boiler. Meanwhile, the furnace ash heat energy recovery structure 100 of the embodiment is simple, compact and reasonable in design; therefore, the heat recovery structure 100 for furnace dust of the present embodiment has high economical efficiency and practicability.
It should be noted that when the ash 300 is fully contacted with the air in the ash bucket 110, the heavier particles in the ash 300 will continuously drop toward the discharge port 112 due to their own weight; and lighter particles in the ash 300 are driven by the air to return to the hearth again and serve as bed materials of the bed layer of the boiler body.
Further, referring to fig. 1 and 2, the ash heat energy recovery structure 100 further includes a nozzle 140. The nozzle 140 is disposed on the hopper 110, and an input end of the nozzle 140 is disposed to communicate with the discharge port 112. In this manner, when the ashes 300 are introduced into the discharge hole 112, the ashes 300 are accurately injected into the transfer mechanism 200 through the nozzles 140, so that the ashes 300 are stably discharged.
In one embodiment, referring to fig. 1, the ash bucket 110 is provided with a closable valve 130. The valve 130 is used for servicing the equipment below the ash bucket 110. In the event of a mechanical failure of the delivery mechanism 200, the valve 130 may be closed to service the equipment.
In one embodiment, referring to fig. 1 and 2, the cross-sectional area S of the ash hopper 110 gradually decreases from the end of the ash hopper 110 near the inlet 111 to the end of the ash hopper 110 near the outlet 112. Therefore, the ash hopper 110 of the present embodiment has a funnel-shaped structure or an approximate funnel-shaped structure, so that the ash 300 can slide into the discharge hole 112 more smoothly. Meanwhile, the cross-sectional area of the ash bucket 110 is gradually reduced closer to the discharge port 112, so that the discharge amount of the ash 300 from the discharge port 112 is reduced, the ash 300 can be effectively accumulated at the discharge port 112, and the air entering from the air guide pipe 120 is effectively prevented from being directly discharged from the discharge port 112.
In one embodiment, referring to fig. 1 and 2, an ash handling apparatus includes a conveying mechanism 200 and the ash heat energy recovery structure 100 of any of the above embodiments. The discharge port 112 is communicated with the input end of the conveying mechanism 200.
Above-mentioned ashes processing apparatus adopts above ashes heat recovery structure 100, falls into feed inlet 111 in the furnace of boiler body when ashes 300, starts the air-blower, through air guide pipe fitting 120, with air transport to ash bucket 110 in for air and ashes 300 fully contact in ash bucket 110, thereby make ashes 300 obtain effectively and stably cool down. The cooled ash 300 will continuously drop to the discharge port 112 due to its own gravity, and drop out from the discharge port 112 to the conveying mechanism 200. Because a large amount of furnace dust 300 is accumulated at the discharge port 112 of the dust hopper 110, and certain pressure is caused to the flowing of air, the heated air can be continuously conveyed towards the feed port 111, so that stable reverse convection heat transfer is realized between the air and the furnace dust 300, the heat transfer efficiency between the air and the furnace dust 300 is improved, and the cooling effect of the furnace dust 300 is favorably improved. Meanwhile, heated air enters the hearth from the feeding hole 111 and participates in fuel combustion reaction in the hearth, so that heat obtained from the furnace dust 300 is effectively recycled in the hearth, and the energy utilization rate of the furnace dust 300 is greatly improved. Specifically, in the present embodiment, there are two or more ash hoppers 110, two or more conveying mechanisms 200, and the ash hoppers 110 and the conveying mechanisms 200 are arranged in one-to-one correspondence.
Further, referring to fig. 2, the conveying mechanism 200 includes a conveying pipe 210 and a vibrating assembly 220. The delivery pipe 210 is provided with a delivery port 211 and a discharge port 212. The material conveying port 211 is communicated with the material outlet 112. The vibration assembly 220 is in transmission connection with the conveying pipe 210, and the vibration assembly 220 is used for vibrating the conveying pipe 210. Therefore, when the ash 300 enters the conveying pipe 210 from the material conveying opening 211, the vibration assembly 220 is turned on, so that the ash 300 moves in the conveying pipe 210 by a vibration manner and is discharged from the material discharge opening 212. Specifically, in the present embodiment, the vibration assembly 220 is intermittently opened, so as to ensure that a part of the ash 300 is always remained in the conveying pipe 210, and prevent the excessive air from entering the hearth from the material conveying opening 211, which is beneficial to maintaining the oxygen content in the hearth stable. Specifically, in the embodiment, the conveying pipe 210 is provided with a first material guiding pipe 213 and a second material guiding pipe 214, the first material guiding pipe 213 is located at the material conveying opening 211, and the second material guiding pipe 214 is located at the material discharging opening 212.
Alternatively, the vibration assembly 220 is a cylinder, a hydraulic cylinder, an electric cylinder, or a combination of an electric motor and the eccentric 221. When the vibration assembly 220 is a motor and an eccentric 221, the eccentric 221 is disposed on the conveying pipe 210, and thus, the eccentric 221 is rotated by rotating the motor; and then the conveying pipe 210 is vibrated up and down by the eccentric wheel 221.
Further, referring to fig. 2, the delivery pipe 210 is disposed obliquely, and an end of the delivery pipe 210 near the material delivery opening 211 is lower than an end of the delivery pipe 210 near the material discharge opening 212. Because the end of the material conveying opening 211 is lower than the end of the material discharging opening 212, most of the furnace ash 300 in the conveying pipe 210 is concentrated at the material conveying opening 211, and the material conveying opening 211 is blocked by the furnace ash 300, so that the cooling air input in the ash bucket 110 is prevented from leaking from the material conveying opening 211 in a large quantity; meanwhile, the external excessive air is prevented from entering the hearth from the material conveying opening 211, so that the constant oxygen content in the hearth is maintained.
In one embodiment, referring to fig. 2, the ash handling apparatus further includes a mounting structure 230. The mounting structure 230 is disposed on the delivery tube 210. The vibration assembly 220 is drivingly connected to the delivery tube 210 via the mounting structure 230. In this manner, the force of the vibration assembly 220 is better transmitted to the transmission pipe 210 by the mounting structure 230.
Further, referring to fig. 2 and 3, the ash handling apparatus further includes a connecting rod structure 240 and a supporting frame 250. The mounting structure 230 is in driving connection with the support frame 250 through the link structure 240. In this way, the transmission pipe 210 and the mounting structure 230 are stably vibrated on the supporting frame 250 by the link structure 240. Specifically, in the present embodiment, the link structure 240 includes a first connecting seat 241, a first connecting rod 242, a second connecting rod 243, a third connecting rod 244 and a second connecting seat 245, the first connecting seat 241 is disposed on the mounting structure 230, the second connecting seat 245 is disposed on the supporting frame 250, the first connecting rod 242 is rotatably connected to the third connecting rod 244 through the second connecting rod 243, the first connecting rod 242 is rotatably connected to the first connecting seat 241, and the third connecting rod 244 is rotatably connected to the second connecting seat 245. Therefore, the connecting rod structure 240 of the present embodiment is a crank structure, so that the transmission tube 210 stably vibrates on the supporting frame 250.
In one embodiment, referring to fig. 1 and 2, a sludge incineration fluidized bed boiler includes a boiler body and an ash treatment device in any one of the above embodiments. The hearth of the boiler body is communicated with the feed inlet 111.
Foretell sludge incineration fluidized bed boiler adopts above ashes processing apparatus, falls into feed inlet 111 in the furnace of boiler body when ashes 300, starts the air-blower, through air guide pipe fitting 120, with air transport to ash bucket 110 in for air and ashes 300 fully contact in ash bucket 110, thereby make ashes 300 obtain effectively and stably cool down. The cooled ash 300 will continuously drop to the discharge port 112 due to its own gravity, and will drop out from the discharge port 112. Because a large amount of furnace dust 300 is accumulated at the discharge port 112 of the dust hopper 110, and certain pressure is caused to the flowing of air, the heated air can be continuously conveyed towards the feed port 111, so that stable reverse convection heat transfer is realized between the air and the furnace dust 300, the heat transfer efficiency between the air and the furnace dust 300 is improved, and the cooling effect of the furnace dust 300 is favorably improved. Meanwhile, heated air enters the hearth from the feeding hole 111 and participates in fuel combustion reaction in the hearth, so that heat obtained from the furnace dust 300 is effectively recycled in the hearth, and the energy utilization rate of the furnace dust 300 is greatly improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A furnace dust heat energy recovery structure, characterized by comprising:
the ash hopper is provided with a feeding hole and a discharging hole, and the feeding hole is communicated with a hearth of the boiler body; and
the air guide pipe fitting is arranged on the ash bucket, one end of the air guide pipe fitting is communicated with the interior of the ash bucket, and the other end of the air guide pipe fitting is communicated with the air blower.
2. The furnace dust heat energy recovery structure of claim 1, further comprising a nozzle, wherein the nozzle is arranged on the dust hopper, and an input end of the nozzle is communicated with the discharge hole.
3. The furnace dust heat energy recovery structure of claim 1, wherein the ash hopper is provided with a closable valve for repairing the ash hopper.
4. The furnace dust heat energy recovery structure according to any one of claims 1 to 3, wherein the cross-sectional area S in the ash hopper is gradually reduced from an end of the ash hopper near the feed port to an end of the ash hopper near the discharge port.
5. A furnace dust treatment device, which is characterized by comprising a conveying mechanism and the furnace dust heat energy recovery structure of any one of claims 1 to 4, wherein the discharge port is communicated with the input end of the conveying mechanism.
6. The furnace dust processing device according to claim 5, wherein the conveying mechanism comprises a conveying pipe and a vibration component, the conveying pipe is provided with a conveying port and a discharging port, the conveying port is communicated with the discharging port, the vibration component is in transmission connection with the conveying pipe, and the vibration component is used for vibrating the conveying pipe.
7. The apparatus for treating furnace dust according to claim 6, wherein said duct is disposed obliquely, and an end of said duct near said material feeding opening is disposed lower than an end of said duct near said material discharging opening.
8. The ashes of any one of the claims 6-7, further comprising a mounting structure provided on the delivery pipe, through which the vibration assembly is drivingly connected to the delivery pipe.
9. The furnace dust processing device of claim 8, further comprising a connecting rod structure and a support frame, wherein the mounting structure is in transmission connection with the support frame through the connecting rod structure.
10. A sludge incineration fluidized bed boiler, which is characterized by comprising a boiler body and the ash treatment device of any one of claims 5 to 9, wherein a hearth of the boiler body is communicated with the feeding hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920895138.0U CN210425006U (en) | 2019-06-14 | 2019-06-14 | Furnace ash heat energy recovery structure, furnace ash treatment device and sludge incineration fluidized bed boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920895138.0U CN210425006U (en) | 2019-06-14 | 2019-06-14 | Furnace ash heat energy recovery structure, furnace ash treatment device and sludge incineration fluidized bed boiler |
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| CN210425006U true CN210425006U (en) | 2020-04-28 |
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| CN201920895138.0U Active CN210425006U (en) | 2019-06-14 | 2019-06-14 | Furnace ash heat energy recovery structure, furnace ash treatment device and sludge incineration fluidized bed boiler |
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| CN (1) | CN210425006U (en) |
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