CN215294894U - Discharge device for reducing carbon content in boiler bottom slag - Google Patents
Discharge device for reducing carbon content in boiler bottom slag Download PDFInfo
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- CN215294894U CN215294894U CN202121269944.0U CN202121269944U CN215294894U CN 215294894 U CN215294894 U CN 215294894U CN 202121269944 U CN202121269944 U CN 202121269944U CN 215294894 U CN215294894 U CN 215294894U
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Abstract
The utility model provides a reduce boiler bottom sediment carbonaceous content discharging equipment, the device is including locating the inside first sieve of furnace plenum, second sieve and slag discharging channel, and locate inside fluidization hood and the directional hood of furnace cavity, slag discharging channel runs through first sieve and second sieve, and its upper portion is linked together with the furnace cavity, its lower part stretches into in the furnace plenum, fluidization hood equipartition is located in the furnace plenum and is linked together with the furnace plenum, directional hood encircles on locating the furnace cavity of slag discharging channel circumference, and its bottom portion is linked together with the furnace plenum, furnace plenum lateral part intercommunication has the fluidization plenum, furnace plenum lower part is equipped with the scum pipe. The utility model utilizes the fluidizing air of the fluidizing air chamber to cool the bottom slag, thereby greatly reducing the temperature of the bottom slag and improving the recycling of the heat stored in the bottom slag; meanwhile, a large amount of fine particles, unburned carbon and unreacted limestone particles in the bottom slag are carried by fluidizing air and then are sent back to the hearth, so that the utilization rate of the limestone of the coal is improved.
Description
Technical Field
The utility model relates to a boiler technical field particularly, relates to a reduce boiler bottom sediment carbonaceous content discharging equipment.
Background
With the rapid development of science and technology, people continuously strengthen the consciousness of energy conservation and environmental protection, and energy conservation and environmental protection become the important subjects of the current social development. The development and application of the circulating fluidized bed boiler technology are widely applied, and the technology is one of the advanced technologies for clean coal combustion and realization of sustainable development strategy. It has the advantages of saving energy, clean combustion, safety, reliability, reducing pollution discharge, etc.
In recent years, a biomass circulating fluidized bed boiler, which is generally provided with a bottom slag discharge device for discharging bottom slag out of a furnace, has become a main device of biomass fuel burning power generation technology. However, when biomass fuel, especially agricultural wastes, ash and slag are easy to be bonded into a mass to block a slag discharge pipe, so that the slag discharge of a boiler is not smooth, and uneven air distribution is caused, so that the bed temperature is locally higher, a hearth is coked, the combustion efficiency is influenced, and even the boiler is stopped urgently. In addition, there is a case where part of the supplied coal or the returned material is discharged as bottom slag from the furnace without being sufficiently burned, and unburned carbon contained in the bottom slag is high, which results in waste of resources.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a reduce boiler bottom sediment carbonaceous content discharging equipment, the easy conglobation that bonds of lime-ash among the prior art has been solved, blocks up the scum pipe, and the carbon that does not burn that contains in the bottom sediment is higher, causes the extravagant problem of resource.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a reduce boiler bottom sediment carbonaceous emission device, the inside furnace plenum that has the furnace cavity and is located furnace cavity below of boiler, the device is including locating inside first sieve, second sieve and the sediment passageway of furnace plenum to and locate inside fluidization hood and the directional hood of furnace cavity, the sediment passageway runs through first sieve and second sieve, and its upper portion with the furnace cavity is linked together, and its lower part stretches into in the furnace plenum, fluidization hood equipartition is located in the furnace cavity and is linked together with the furnace plenum, directional hood encircles on locating the furnace cavity of sediment passageway circumference, and its bottom portion is linked together with the furnace plenum, furnace plenum lateral part intercommunication has the fluidization plenum, furnace plenum lower part is equipped with the scum pipe.
As a preferred scheme, a cooling air pipe is arranged on the side part of the slag discharge pipe, and the inlet of the cooling air pipe is connected with a cooling fan.
As a preferred scheme, a plurality of water-cooling pipes are laid on the inner wall of the hearth air chamber and the outer wall of the slag discharge channel, and are exposed out of the hearth air chamber and communicated with each other through a water-cooling header arranged on the outer wall of the hearth air chamber.
Preferably, the first sieve plate is horizontally arranged, and the second sieve plate is obliquely and upwards arranged.
Preferably, the outlet of the directional hood is inclined downwards at an angle of 15-35 degrees with the horizontal plane.
Preferably, the bottom end of the fluidized air chamber is provided with an ash falling port, and the section of the ash falling port is circular.
Preferably, the lower part of the slag discharging channel is bent towards one side of the slag discharging pipe to form a curved outlet.
Compared with the prior art, the beneficial effects of the utility model include: the slag discharging channel is arranged in the hearth air chamber, the bottom slag falls into the hearth air chamber through the slag discharging channel, the fluidized air in the fluidized air chamber is used for cooling the bottom slag, the temperature of the bottom slag is greatly reduced, and the fluidized air absorbs the heat of the bottom slag and then enters the hearth chamber to participate in combustion, so that the recycling of the heat stored by the bottom slag is improved; meanwhile, a large amount of fine particles, unburned carbon and unreacted limestone particles in the bottom slag are carried by fluidizing air and then are sent back to the hearth, so that the utilization rate of limestone of coal is improved; in addition, a cooling air pipe is arranged on the slag discharge pipe, so that the heat storage temperature of the bottom slag is further reduced.
Drawings
The disclosure of the present invention is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:
fig. 1 is a schematic structural diagram of a device for reducing carbon content in bottom slag of a boiler according to an embodiment of the present invention.
Reference numbers in the figures: 1 hearth wind chamber, 2 first sieve plate, 3 second sieve plate, 4 hearth chambers, 5 fluidization wind caps, 6 directional wind caps, 7 water cooling pipes, 8 water cooling header, 9 slag discharging channel, 10 fluidization wind chamber, 11 cooling wind pipe, 12 slag discharging pipe and 13 ash falling port.
Detailed Description
It is easily understood that, according to the technical solution of the present invention, a plurality of alternative structural modes and implementation modes can be proposed by those skilled in the art without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.
An embodiment according to the present invention is shown in conjunction with fig. 1. A discharge device for reducing the carbon content of boiler bottom slag is characterized in that a hearth chamber 4 and a hearth air chamber 1 are arranged in a fluidized bed boiler, the hearth air chamber 1 is located below the hearth chamber 4, the hearth chamber 4 is used for burning biomass fuel or fossil fuel, and the hearth air chamber 1 is used for introducing primary fluidized air into the hearth chamber 4.
In this embodiment, this discharging equipment is including locating inside first sieve 2, second sieve 3 and the sediment passageway 9 of furnace plenum 1 to and locate inside fluidization hood 5 and the directional hood 6 of furnace cavity 4, and first sieve 2 is the horizontal setting, and second sieve 3 is the slope and upwards sets up, and first sieve 2 and second sieve 3 are used for filtering large granule material, make the granule material and the fluidization wind pass through. The slag discharge channel 9 penetrates through the first sieve plate 2 and the second sieve plate 3, the upper part of the slag discharge channel is communicated with the hearth chamber 4, and the lower part of the slag discharge channel extends into the hearth wind chamber 1. The side part of the hearth wind chamber 1 is communicated with a fluidizing wind chamber 10 for introducing primary fluidizing wind. The lower part of the hearth wind chamber 1 is provided with a slag discharge pipe 12.
The fluidization air caps 5 are uniformly distributed in the hearth chamber 4 and communicated with the hearth air chamber 1, and are used for ensuring uniform fluidization of primary air of the boiler. The directional blast cap 6 is arranged on the hearth chamber 4 around the slag discharge channel 9, the bottom end part of the directional blast cap is communicated with the hearth wind chamber 1, and an included angle which deflects downwards by 15-35 degrees is formed between the outlet of the directional blast cap 6 and the horizontal plane and is used for blowing bottom slag near the slag discharge channel 9 into the slag discharge channel 9, so that the slag discharge fluency is improved.
Preferably, the lower part of the slag discharge channel 9 is bent towards one side of the slag discharge pipe 12 to form a curved outlet, the curved outlet is opposite to the air inlet direction of the fluidization air chamber 10, so that fluidized air is not easy to enter the slag discharge channel 9, the smooth discharge of bottom slag is not influenced, the curved outlet faces the slag discharge pipe 12, the bottom slag flowing out of the slag discharge pipe 12 automatically slides into the slag discharge pipe 12 under the action of gravity, and the slag discharge is smooth.
A plurality of water-cooling pipes 7 are laid on the inner wall of the hearth wind chamber 1 and the outer wall of the slag discharge channel 9, and the water-cooling pipes 7 are exposed out of the hearth wind chamber 1 and are communicated with each other through a water-cooling header 8 arranged on the outer wall of the hearth wind chamber 1. The water cooling pipe 7 can absorb the heat accumulated on the hearth air chamber 1 and the slag discharge channel 9, and the heat recovery rate is improved.
Furthermore, a cooling air pipe 11 is arranged on the side part of the slag discharge pipe 12, and a cooling fan is connected to the inlet of the cooling air pipe 11, so that the heat storage temperature of the bottom slag is further reduced.
In this embodiment, the bottom end of the fluidization air chamber 10 is provided with an ash falling port 13, and the section of the ash falling port 13 is circular, so that when ash is accumulated in the air chamber, the ash can be discharged from the ash falling port 13.
To sum up, the beneficial effects of the utility model include: the slag discharging channel 9 is arranged in the hearth wind chamber 1, the bottom slag falls into the hearth wind chamber 1 through the slag discharging channel 9, the fluidized air in the fluidized wind chamber 10 is used for cooling the bottom slag, the temperature of the bottom slag is greatly reduced, the fluidized air absorbs the bottom slag to store heat and then enters the hearth chamber 4 to participate in combustion, and the recycling of the stored heat of the bottom slag is improved; meanwhile, a large amount of fine particles, unburned carbon and unreacted limestone particles in the bottom slag are carried by fluidizing air and then are sent back to the hearth, so that the utilization rate of limestone of coal is improved; in addition, the cooling air pipe 11 is arranged on the slag discharge pipe 12, so that the heat storage temperature of the bottom slag is further reduced.
The technical scope of the present invention is not limited to the content in the above description, and those skilled in the art can make various modifications and alterations to the above embodiments without departing from the technical spirit of the present invention, and these modifications and alterations should fall within the protection scope of the present invention.
Claims (7)
1. The utility model provides a reduce boiler bottom sediment carbonaceous emission device, the inside furnace plenum that has the furnace cavity and is located furnace cavity below of boiler, its characterized in that, the device is including locating inside first sieve, second sieve and the slag discharge passage of furnace plenum to and locate inside fluidization hood and the directional hood of furnace cavity, slag discharge passage runs through first sieve and second sieve, and its upper portion with the furnace cavity is linked together, and its lower part stretches into in the furnace plenum, fluidization hood equipartition is located in the furnace cavity and is linked together with the furnace plenum, directional hood encircles on locating the furnace cavity of slag discharge passage circumference, and its bottom end portion is linked together with the furnace plenum, furnace plenum lateral part intercommunication has the fluidization plenum, furnace plenum lower part is equipped with the slag discharge pipe.
2. The carbon content of boiler bottom slag reducing discharging device according to claim 1, wherein a cooling air pipe is arranged at the side of the slag discharging pipe, and a cooling fan is connected to the inlet of the cooling air pipe.
3. The carbon content of boiler bottom ash discharge device as claimed in claim 1, wherein a plurality of water cooling tubes are laid on the inner wall of the furnace plenum and the outer wall of the slag discharge passage, and the plurality of water cooling tubes are exposed out of the furnace plenum and are communicated with each other through a water cooling header tank arranged on the outer wall of the furnace plenum.
4. The carbon content of boiler bottom slag reducing discharging device as recited in claim 1, wherein said first sieve plate is disposed horizontally, and said second sieve plate is disposed obliquely upward.
5. The device for reducing the carbon content in the boiler bottom slag according to claim 1, wherein the outlet of the directional hood is inclined downward at an angle of 15-35 ° with respect to the horizontal plane.
6. The carbon content of boiler bottom ash discharge device as claimed in claim 1, wherein the bottom end of the fluidizing plenum is provided with an ash falling port, and the section of the ash falling port is circular.
7. The carbon content of the boiler bottom slag reducing discharging device of claim 1, wherein the lower portion of the slag discharging channel is bent to one side of the slag discharging pipe to form a curved outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121269944.0U CN215294894U (en) | 2021-06-08 | 2021-06-08 | Discharge device for reducing carbon content in boiler bottom slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121269944.0U CN215294894U (en) | 2021-06-08 | 2021-06-08 | Discharge device for reducing carbon content in boiler bottom slag |
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| CN215294894U true CN215294894U (en) | 2021-12-24 |
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| CN202121269944.0U Active CN215294894U (en) | 2021-06-08 | 2021-06-08 | Discharge device for reducing carbon content in boiler bottom slag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115493137A (en) * | 2022-09-30 | 2022-12-20 | 上海工业锅炉(无锡)有限公司 | Air-cooled slag falling assembly for circulating fluidized bed |
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2021
- 2021-06-08 CN CN202121269944.0U patent/CN215294894U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115493137A (en) * | 2022-09-30 | 2022-12-20 | 上海工业锅炉(无锡)有限公司 | Air-cooled slag falling assembly for circulating fluidized bed |
| CN115493137B (en) * | 2022-09-30 | 2023-08-18 | 上海工业锅炉(无锡)有限公司 | Air-cooled slag falling assembly for circulating fluidized bed |
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