CN112682816A - Coal-fired boiler tail gas membrane filtration oxygen enrichment recycling device and using method - Google Patents
Coal-fired boiler tail gas membrane filtration oxygen enrichment recycling device and using method Download PDFInfo
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- CN112682816A CN112682816A CN202011590635.3A CN202011590635A CN112682816A CN 112682816 A CN112682816 A CN 112682816A CN 202011590635 A CN202011590635 A CN 202011590635A CN 112682816 A CN112682816 A CN 112682816A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a membrane filtration oxygen enrichment recycling device for tail gas of a coal-fired boiler and a using method thereof, the membrane filtration oxygen enrichment recycling device comprises a boiler, a membrane filtration device, a heat exchange cylinder and a flue gas filter box, the top of the boiler is provided with the membrane filtration device, the top of the membrane filtration device is provided with an exhaust pipe and a return pipe, one end of the exhaust pipe is connected with the heat exchange cylinder, the top of the heat exchange cylinder is provided with the flue gas filter box, the top of the flue gas filter box is provided with a chimney, one end of the heat exchange cylinder is provided with a connector, the upper part of the connector is provided with an air inlet groove, the lower part of the connector is provided with an air outlet groove, the device can filter the tail gas of the boiler through a membrane and recycle air with oxygen enrichment, the combustion efficiency of the boiler is increased, more oxygen is provided when the boiler is combusted, the combustion is more sufficient, thereby protecting the environment.
Description
Technical Field
The invention relates to the field of tail gas recycling, in particular to a coal-fired boiler tail gas membrane filtration oxygen-enriched recycling device and a using method thereof.
Background
Along with the development of society, the living standard of people is continuously improved, the scale of cities is continuously increased, the energy consumption is larger and larger, and meanwhile, the supply and demand contradiction of energy is more and more prominent due to the gradual exhaustion of disposable energy. For the sustainable development, the nation pays more and more attention to energy conservation and emission reduction. Because the coal contains sulfur, a large amount of harmful gases such as sulfur dioxide (SO2) are mixed in the tail gas generated by the combustion of the medium and small coal-fired boilers, and the surrounding environment and the atmosphere are seriously polluted along with the discharge of the tail gas of the coal-fired boilers. The known coal-fired boiler tail gas treatment adopts a dry method or a wet method desulfurization and denitration technology, the dry method desulfurization rate is about 85 percent, the wet method desulfurization rate is about 90 percent, some thermal power plants do not reduce the total emission amount of SO2 and cause a large amount of oxygen enrichment in the tail gas because the concentrations of SO2 and NOx which are discharged by the tail gas do not exceed the standard and the air induction amount of a draught fan is increased, the problems of insufficient combustion of coal, 8-10 percent of unburned coal in slag, increased air preheating cost, new resource waste and the like are caused, a large amount of high-temperature flue gas is discharged into the air and is a main factor causing global greenhouse effect, the prior art can not filter the boiler tail gas through a membrane and recycle the air with oxygen enrichment, can not recycle the waste gas, cause waste of data, can not recycle the heat in the waste gas and cause heat loss, forming global greenhouse effect, causing glacier to melt and damaging the environment.
Disclosure of Invention
The invention aims to provide a coal-fired boiler tail gas membrane filtration oxygen-enriched recycling device and a using method aiming at the defects of the prior art so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a membrane filtration oxygen enrichment recycling device for tail gas of a coal-fired boiler comprises a boiler, a membrane filtration device, a heat exchange cylinder and a flue gas filter box, wherein the membrane filtration device is installed at the top of the boiler, an exhaust pipe and a return pipe are installed at the top of the membrane filtration device, one end of the exhaust pipe is connected with the heat exchange cylinder, the flue gas filter box is installed at the top of the heat exchange cylinder, a chimney is installed at the top of the flue gas filter box, a connector is arranged at one end of the heat exchange cylinder, an air inlet groove is formed in the upper portion of the connector, an air outlet groove is formed in the lower portion of the connector, a flue pipe fixing piece is installed at one end of the connector, a plurality of flue gas conveying metal pipes are installed on the flue pipe fixing piece, a plurality of air guide plates are installed inside the heat exchange cylinder, a boiler air inlet pipe is, an air inlet pipe is installed on one side of the flue gas filter box, a connecting pipe is installed on the other side of the flue gas filter box, a supporting seat is installed at the bottom of the heat exchange cylinder, a base is installed at the bottom of the supporting seat, and a power switch is installed on the supporting seat.
As a preferable technical scheme of the invention, the membrane filtering device is connected with an air outlet pipe at the top of the boiler, and the membrane filtering device is connected with an air inlet hole of the boiler through a return pipe.
As a preferred technical scheme of the invention, the heat exchange cylinder is installed on the top of the supporting seat through a bolt, the supporting seat is installed on the top of the base through a bolt, and the heat exchange cylinder is connected with an air inlet of a boiler through an air inlet pipe of the boiler.
As a preferred technical scheme of the invention, the connector is fixed on one end of the heat exchange cylinder through a connecting flange, the membrane filtering device is connected with the air inlet groove through an exhaust pipe, and the air outlet groove is connected with the flue gas filtering box through a connecting pipe.
As a preferred technical scheme of the invention, the air guide plate is welded on the inner part of the heat exchange cylinder, and the smoke conveying metal pipe penetrates through the air guide plate and is fixedly connected with the smoke pipe fixing parts on the air inlet groove and the air outlet groove respectively.
As a preferred technical scheme of the invention, the flue gas filter box is arranged on the top of the heat exchange cylinder through bolts, the chimney is welded on the top of the flue gas filter box, and a plurality of filter screens are arranged in the flue gas filter box.
As a preferred technical scheme of the invention, the power switch is electrically connected with the centrifugal fan box.
A use method of a coal-fired boiler tail gas membrane filtration oxygen enrichment recycling device comprises the following specific steps:
the method comprises the following steps: the flue gas on the boiler passes through a membrane filtering device, and oxygen is introduced into the coal-fired boiler for combustion;
step two: the flue gas is conveyed into the gas inlet groove through the exhaust pipe, conveyed into the flue gas conveying metal pipe through the gas inlet groove, discharged into the connecting pipe through the gas outlet groove, conveyed into the flue gas filtering box through the connecting pipe, filtered and discharged through the chimney;
step three: meanwhile, a power supply of the centrifugal fan in the centrifugal fan box is switched on through a power switch, so that the centrifugal fan brakes, external air is conveyed into the heat exchange cylinder through the air inlet pipe, the air is fully contacted with the smoke conveying metal pipe in the heat exchange cylinder through the air guide plate to improve the heat of the air, and the smoke heat is conveyed into the boiler through the boiler air inlet pipe to be recycled.
The invention has the beneficial effects that: the device can pass through membrane filtration with boiler tail gas and the air recovery who will have the oxygen boosting recycles, increases the combustion efficiency of boiler, has more oxygen when letting the boiler burning, lets the burning more abundant, can also recycle the heat recovery in the waste gas, avoids causing the heat to run off, reduces the influence to global warming effect to the environmental protection.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. boiler, 2, membrane filter equipment, 3, blast pipe, 4, back flow pipe, 5, heat exchange cylinder, 6, flue gas rose box, 7, chimney, 8, tobacco pipe mounting, 9, air inlet pipe, 10, flange, 11, air inlet tank, 12, connector, 13, air outlet tank, 14, boiler inlet pipe, 15, supporting seat, 16, switch, 17, connecting pipe, 18, air guide plate, 19, flue gas delivery metal pipe, 20 bases.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the invention.
Example (b): referring to fig. 1, the present invention provides a technical solution: a coal-fired boiler tail gas membrane filtration oxygen enrichment recycling device and a using method thereof comprise a boiler 1, a membrane filtration device 2, a heat exchange cylinder 5 and a flue gas filter box 6, wherein the membrane filtration device 2 is installed at the top of the boiler 1, an exhaust pipe 3 and a return pipe 4 are installed at the top of the membrane filtration device 2, one end of the exhaust pipe 3 is connected with the heat exchange cylinder 5, the flue gas filter box 6 is installed at the top of the heat exchange cylinder 5, a chimney 7 is installed at the top of the flue gas filter box 6, a connector 12 is arranged at one end of the heat exchange cylinder 5, an air inlet groove 11 is arranged at the upper part of the connector 12, an air outlet groove 13 is arranged at the lower part of the connector 12, a flue gas pipe fixing part 8 is installed at one end of the connector 12, a plurality of flue gas conveying metal pipes 19 are installed on the flue gas pipe fixing part 8, the centrifugal fan box 21 is installed on the boiler air inlet pipe 14, the air inlet pipe 9 is installed on one side of the smoke filtering box 6, the connecting pipe 17 is installed on the other side of the smoke filtering box 6, the supporting seat 15 is installed at the bottom of the heat exchange cylinder 5, the base 20 is installed at the bottom of the supporting seat 15, and the power switch 16 is installed on the supporting seat 15.
The membrane filtering device 2 is connected with an air outlet pipe at the top of the boiler 1, and the membrane filtering device 2 is connected with an air inlet hole of the boiler 1 through a return pipe 4.
The heat exchange cylinder 5 is installed on the top of the support base 15 by bolts, the support base 15 is installed on the top of the base 20 by bolts, and the heat exchange cylinder 5 is connected with the air inlet of the boiler 1 by the boiler inlet duct 14.
The connector 12 is fixed on one end of the heat exchange cylinder 5 through the connecting flange 10, the membrane filtering device 2 is connected with the air inlet groove 11 through the exhaust pipe 3, and the air outlet groove 13 is connected with the flue gas filtering box 6 through the connecting pipe 17.
The air guide plate 18 is welded on the inner part of the heat exchange cylinder 5, and the flue gas delivery metal pipe 19 passes through the air guide plate 18 and is fixedly connected with the flue pipe fixing part 8 on the air inlet groove 11 and the air outlet groove 13 respectively.
The flue gas filtering box 6 is installed on the top of the heat exchange cylinder 5 through bolts, the chimney 7 is welded on the top of the flue gas filtering box 6, and a plurality of filter screens are installed inside the flue gas filtering box 6.
The power switch 16 is electrically connected to the centrifugal fan case 21.
A use method of a coal-fired boiler tail gas membrane filtration oxygen enrichment recycling device comprises the following specific steps:
the method comprises the following steps: the flue gas on the boiler 1 passes through the membrane filtering device 2, and oxygen is introduced into the coal-fired boiler for combustion;
step two: the flue gas is conveyed into the gas inlet groove 11 through the gas exhaust pipe 3, conveyed into the flue gas conveying metal pipe 19 through the gas inlet groove 11, discharged into the connecting pipe 17 through the gas outlet groove 13, conveyed into the flue gas filtering box 6 through the connecting pipe 17 for filtering and then discharged through the chimney 7;
step three: meanwhile, a power supply of the centrifugal fan in the centrifugal fan box 21 is connected through a power supply switch 16, the centrifugal fan is braked, so that outside air is conveyed into the heat exchange cylinder 5 through the air inlet pipe 9, the air is fully contacted with the flue gas conveying metal pipe 19 in the heat exchange cylinder 5 through the air guide plate 18 to improve the heat of the air, and the air is conveyed into the boiler 1 through the boiler air inlet pipe 14 to recycle the heat of the flue gas.
The working principle is as follows: a coal-fired boiler tail gas membrane filtration oxygen enrichment cyclic utilization device and a using method thereof are disclosed, wherein a boiler 1, a membrane filtration device 2, an exhaust pipe 3, a return pipe 4, a heat exchange cylinder 5, a flue gas filter box 6, a chimney 7, a flue pipe fixing piece 8, an air inlet pipe 9, a connecting flange 10, an air inlet groove 11, a connector 12, an air outlet groove 13, a boiler air inlet pipe 14, a supporting seat 15, a power switch 16, a connecting pipe 17, an air guide plate 18, a flue gas conveying metal pipe 19, a base 20 and a centrifugal fan box 21 are arranged on the boiler 1, flue gas on the boiler 1 passes through the membrane filtration device 2, and oxygen is introduced into the coal-fired boiler; the flue gas is conveyed into the gas inlet groove 11 through the gas exhaust pipe 3, conveyed into the flue gas conveying metal pipe 19 through the gas inlet groove 11, discharged into the connecting pipe 17 through the gas outlet groove 13, conveyed into the flue gas filtering box 6 through the connecting pipe 17 for filtering and then discharged through the chimney 7; meanwhile, a power supply of the centrifugal fan in the centrifugal fan box 21 is connected through a power supply switch 16, the centrifugal fan is braked, so that outside air is conveyed into the heat exchange cylinder 5 through the air inlet pipe 9, the air is fully contacted with the flue gas conveying metal pipe 19 in the heat exchange cylinder 5 through the air guide plate 18 to improve the heat of the air, and the air is conveyed into the boiler 1 through the boiler air inlet pipe 14 to recycle the heat of the flue gas.
The device can pass through membrane filtration with boiler tail gas and the air recovery who will have the oxygen boosting recycles, increases the combustion efficiency of boiler, has more oxygen when letting the boiler burning, lets the burning more abundant, can also recycle the heat recovery in the waste gas, avoids causing the heat to run off, reduces the influence to global warming effect to the environmental protection.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. The utility model provides a coal fired boiler tail gas membrane filters oxygen boosting cyclic utilization device, includes boiler (1), membrane filter equipment (2), heat exchange cylinder (5) and flue gas rose box (6), its characterized in that: the boiler is characterized in that a membrane filtering device (2) is installed at the top of the boiler (1), an exhaust pipe (3) and a return pipe (4) are installed at the top of the membrane filtering device (2), one end of the exhaust pipe (3) is connected with a heat exchange cylinder (5), a flue gas filtering box (6) is installed at the top of the heat exchange cylinder (5), a chimney (7) is installed at the top of the flue gas filtering box (6), a connector (12) is arranged at one end of the heat exchange cylinder (5), an air inlet groove (11) is arranged at the upper part of the connector (12), an air outlet groove (13) is arranged at the lower part of the connector (12), a smoke pipe fixing piece (8) is installed at one end of the connector (12), a plurality of smoke conveying metal pipes (19) are installed on the smoke pipe fixing piece (8), a plurality of air guide plates (18) are, boiler intake pipe (14) are installed to the bottom of heat exchange jar (5), install centrifugal fan case (21) on boiler intake pipe (14), air intake pipe (9) are installed to one side of flue gas rose box (6), connecting pipe (17) are installed to the opposite side of flue gas rose box (6), supporting seat (15) are installed to the bottom of heat exchange jar (5), base (20) are installed to the bottom of supporting seat (15), install switch (16) on supporting seat (15).
2. The coal-fired boiler tail gas membrane filtration oxygen-enriched recycling device of claim 1, which is characterized in that: the membrane filtering device (2) is connected with an air outlet pipe at the top of the boiler (1), and the membrane filtering device (2) is connected with an air inlet hole of the boiler (1) through a return pipe (4).
3. The coal-fired boiler tail gas membrane filtration oxygen-enriched recycling device of claim 1, which is characterized in that: the heat exchange cylinder (5) is installed on the top of the supporting seat (15) through a bolt, the supporting seat (15) is installed on the top of the base (20) through a bolt, and the heat exchange cylinder (5) is connected with an air inlet of the boiler (1) through a boiler air inlet pipe (14).
4. The coal-fired boiler tail gas membrane filtration oxygen-enriched recycling device of claim 1, which is characterized in that: connector (12) are fixed in one of heat exchange cylinder (5) through flange (10) and are served, membrane filter equipment (2) link to each other with air inlet duct (11) through blast pipe (3), air outlet duct (13) link to each other with flue gas rose box (6) through connecting pipe (17).
5. The coal-fired boiler tail gas membrane filtration oxygen-enriched recycling device of claim 1, which is characterized in that: the gas guide plate (18) is welded on the inner part of the heat exchange cylinder (5), and the smoke conveying metal pipe (19) penetrates through the gas guide plate (18) to be fixedly connected with the smoke pipe fixing piece (8) on the gas inlet groove (11) and the gas outlet groove (13) respectively.
6. The coal-fired boiler tail gas membrane filtration oxygen-enriched recycling device of claim 1, which is characterized in that: the flue gas filtering box (6) is installed on the top of the heat exchange cylinder (5) through bolts, the chimney (7) is welded on the top of the flue gas filtering box (6), and a plurality of filter screens are installed inside the flue gas filtering box (6).
7. The coal-fired boiler tail gas membrane filtration oxygen-enriched recycling device of claim 1, which is characterized in that: the power switch (16) is electrically connected with the centrifugal fan box (21).
8. The use method of the membrane filtration oxygen-enriched recycling device for the tail gas of the coal-fired boiler according to any one of claims 1 to 7, is characterized in that: the specific method comprises the following steps:
the method comprises the following steps: the flue gas on the boiler (1) passes through the membrane filtering device (2) and oxygen is introduced into the coal-fired boiler for combustion;
step two: the flue gas is conveyed into an air inlet groove (11) through an exhaust pipe (3), conveyed into a flue gas conveying metal pipe (19) through the air inlet groove (11), discharged into a connecting pipe (17) through an air outlet groove (13), conveyed into a flue gas filtering box (6) through the connecting pipe (17), filtered and then discharged through a chimney (7);
step three: meanwhile, a power supply of the centrifugal fan in the centrifugal fan box (21) is connected through a power switch (16), the centrifugal fan is braked, so that outside air is conveyed into the heat exchange cylinder (5) through the air inlet pipe (9), the air is fully contacted with the smoke conveying metal pipe (19) in the heat exchange cylinder (5) through the air guide plate (18) to improve the heat of the air, and the air is conveyed into the boiler (1) through the boiler air inlet pipe (14) to recycle the smoke heat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011590635.3A CN112682816A (en) | 2020-12-29 | 2020-12-29 | Coal-fired boiler tail gas membrane filtration oxygen enrichment recycling device and using method |
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| CN202011590635.3A CN112682816A (en) | 2020-12-29 | 2020-12-29 | Coal-fired boiler tail gas membrane filtration oxygen enrichment recycling device and using method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114001368A (en) * | 2021-11-01 | 2022-02-01 | 连云港虹洋热电有限公司 | Flue gas purification and recycling device of coal-fired boiler and control system thereof |
| CN114151776A (en) * | 2021-10-28 | 2022-03-08 | 连云港虹洋热电有限公司 | Energy-saving emission-reducing coal-fired steam boiler and control system thereof |
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Application publication date: 20210420 |