CN113446615A - Biomass and coal-fired independently-operated biomass coupling power generation system of pulverized coal boiler - Google Patents
Biomass and coal-fired independently-operated biomass coupling power generation system of pulverized coal boiler Download PDFInfo
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- CN113446615A CN113446615A CN202110858351.6A CN202110858351A CN113446615A CN 113446615 A CN113446615 A CN 113446615A CN 202110858351 A CN202110858351 A CN 202110858351A CN 113446615 A CN113446615 A CN 113446615A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/22—Extrusion presses; Dies therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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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 biomass and coal independently operated pulverized coal boiler biomass coupling power generation system which comprises a biomass raw material bin, a star-shaped feeder, an air preheater, a steering chamber, a flue gas fan, a biomass fuel and conveying medium mixed front pipeline, a biomass fuel and conveying medium mixed rear pipeline, a branch pipe, a pulverized coal conveying pipeline, a coal mill, a hearth, a raw coal bin, a coal feeder, a primary cold air fan, a coal mill inlet primary cold air pipeline, a coal mill inlet hot primary air pipeline and a coal mill inlet cold and hot air mixed rear pipeline.
Description
Technical Field
The invention belongs to the field of biomass coupled power generation of thermal power plants, and relates to a biomass and coal-fired independent operation pulverized coal boiler biomass coupled power generation system.
Background
According to the electric power development planning in China, the total installed capacity of renewable wind power and solar power generation reaches more than 12 hundred million kilowatts by 2030, and the renewable wind power and solar power generation becomes the most main power supply in China from the aspect of installed capacity. However, wind power and solar power generation are also provided with short plates which are 'uncontrollable', and the power generation capacity of the installation is severely limited by natural meteorological conditions such as day and night sunlight, seasonal changes, cloudy and clear weather, wind power and the like. According to the report, in 2019, under the condition that the proportion of non-fossil energy power generation in China is only 32.6%, wind power and photoelectricity are generally difficult to grid, absorb and dispatch, and the like. Therefore, in the next decades, during the transition from mainly coal-electricity to a new power system mainly using new energy, the coal-fired thermal power as the stable power production and ballast stone supply in China cannot exit the power production in China. Therefore, how to make coal-electricity production more efficient, cleaner, lower carbon and more flexible becomes an urgent subject to be researched and solved currently by the electric power department.
The renewable energy power such as biomass power generation, wind power generation, solar power generation and the like is the same as the power generation mode with (nearly) zero carbon emission, and the former has the advantages that the wind power generation and the solar power generation do not have, namely, in the nature, the quantity of agricultural and forestry solid residue resources generated by annual cycle is relatively stable, and the fuel can be transported and stored for relatively balanced use throughout the year.
The power generation by using the mixed combustion biomass fuel of the large-scale high-efficiency coal-fired unit is an advanced technology for realizing biomass power generation, can greatly improve the efficiency of biomass power generation, saves biomass resources, can obviously reduce the carbon emission of the coal-electricity unit, improves the flexibility of coal-biomass coupled power generation, enhances the sustainability of coal-electricity production, and is a practical and feasible path for the low-carbon trend of coal electricity.
The biomass coupled power generation of the coal-fired boiler mainly comprises three technical routes of indirect coupling, parallel coupling and direct-fired coupling. The direct combustion coupling means that the biomass fuel is processed into a state that the biomass fuel can be mixed with pulverized coal and directly sent into a hearth to realize mixed combustion; the indirect coupling means that the biomass is firstly gasified in a gasification furnace, and the generated biomass gas is sprayed into a pulverized coal furnace to realize co-combustion; the parallel coupling means that the steam parameters of two parallel boilers of a boiler independently burning biomass and a boiler independently burning pulverized coal are the same, and the steam generated by the biomass boiler is merged into a steam pipe network of the pulverized coal boiler to share a steam turbine for power generation. For the coal-fired units with single-machine capacity equal to or larger than 300MW, the most main coupling mixed combustion mode in the future is direct combustion coupling.
At present, biomass direct-combustion coupling power generation is applied less domestically. The Hardgrove grindability index HGI of the biomass raw material is extremely low, and the biomass raw material can not be directly fed into a conventional coal-fired boiler coal mill for grinding in large quantity. In some plants, biomass fuel and coal are fed into the same coal mill to be pulverized, biomass molding fuel is premixed with the coal at the upstream of the coal feeder, and the biomass molding fuel and the coal are pulverized together in the coal mill and then are sent to corresponding pulverized coal burners through an original powder feeding pipeline. The technology has little or no change to the power plant equipment, but the biomass coupling ratio is extremely low, generally, the long-term continuous biomass coupling ratio is about 1 percent and is not more than 3 percent.
In order to improve the coupling ratio of biomass and enhance the operation flexibility of the biomass, the invention provides a biomass direct-fired coupling power generation system and a biomass direct-fired coupling power generation method for a pulverized coal boiler, wherein biomass and coal can independently operate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a biomass coupling power generation system of a pulverized coal boiler with independent operation of biomass and coal.
In order to achieve the purpose, the biomass and coal-fired independently operated biomass coupling power generation system of the pulverized coal boiler comprises a biomass raw material bin, a star-shaped feeder, an air preheater, a steering chamber, a biomass fuel and conveying medium mixed front pipeline, a biomass fuel and conveying medium mixed rear pipeline, a branch pipe, a pulverized coal conveying pipeline, a coal mill, a hearth, a raw coal bin, a coal feeder, a primary air cooler, a coal mill inlet cold primary air pipeline, a coal mill inlet hot primary air pipeline and a coal mill inlet cold and hot air mixed rear pipeline;
an outlet of the biomass raw material bin is connected with an inlet of the star-shaped feeder; the outlet of the air preheater and the steering chamber are both provided with a furnace smoke exhaust port, the furnace smoke exhaust port of the air preheater is communicated with the inlet of a furnace smoke fan, the furnace smoke exhaust port of the steering chamber is communicated with the inlet of the furnace smoke fan, the outlet of the furnace smoke fan is communicated with the inlet of a pipeline before mixing the biomass fuel and the conveying medium, and the outlet of the star-shaped feeder is communicated with the inlet of the pipeline before mixing the biomass fuel and the conveying medium;
an outlet of the pipeline before the mixing of the biomass fuel and the conveying medium is communicated with a pulverized coal conveying pipeline through a pipeline and a branch pipe after the mixing of the biomass fuel and the conveying medium, a biomass conveying pipeline isolation door is arranged on the branch pipe, one end of the pulverized coal conveying pipeline is communicated with an outlet of a coal mill, the other end of the pulverized coal conveying pipeline is communicated with a pulverized coal burner on a hearth, and a burner inlet primary air isolation door is arranged at an inlet of the pulverized coal burner;
the outlet of the raw coal bin is connected with the fuel side inlet of the coal mill through a coal feeder;
the outlet of the primary cooling fan is divided into two paths, wherein one path is connected with the air inlet of the air preheater, the other path is communicated with the inlet of the primary cooling air inlet pipeline of the coal mill inlet, the air outlet of the air preheater is communicated with the inlet of the primary heating air inlet pipeline of the coal mill inlet, the outlet of the primary cooling air inlet pipeline of the coal mill inlet and the outlet of the primary heating air inlet pipeline of the coal mill inlet are communicated with the drying medium side inlet of the coal mill through the pipeline after the mixed cold and hot air of the coal mill inlet passes through the pipeline and the pipeline.
The outlet of the biomass raw material bin is connected with the inlet of the star-shaped feeder through a bin-type distributing machine, a primary crusher, a cover-type belt conveyor, a secondary crusher, a screw conveyor and a biomass powder bin.
The furnace smoke pumping port of the air preheater is communicated with the inlet of the furnace smoke fan through the cold furnace smoke isolation door, the cold furnace smoke adjusting baffle and the cold furnace smoke pipeline.
The furnace smoke extracting port of the steering chamber is communicated with the inlet of the furnace smoke fan through the furnace smoke isolating door, the furnace smoke adjusting baffle and the furnace smoke pipeline.
The cold primary air pipeline at the inlet of the coal mill is provided with a cold primary air adjusting baffle at the inlet of the coal mill.
And a coal mill inlet hot primary air adjusting baffle is arranged on the coal mill inlet hot primary air pipeline.
The branch pipe is provided with an adjustable shrinkage cavity.
And pressure measuring points and temperature measuring points are arranged on the cold furnace smoke pipeline, the hot furnace smoke pipeline, the biomass fuel and conveying medium mixed front pipeline, the biomass fuel and conveying medium mixed rear pipeline, the coal powder conveying pipeline and the coal mill inlet cold and hot air mixed rear pipeline.
Flow measuring points are arranged on the pipeline before the mixing of the biomass fuel and the conveying medium and the pipeline after the mixing of the cold air and the hot air at the inlet of the coal mill.
The bin type material distributor and the cover type belt conveyor are both provided with iron removal modules.
The invention has the following beneficial effects:
when the biomass and coal-fired coal independently operated pulverized coal boiler biomass coupling power generation system is operated specifically, biomass particles with particle sizes meeting requirements are sent into a hearth for combustion by adding a set of biomass raw material storage, primary crushing, secondary crushing, biomass powder bin storage and furnace smoke drying and conveying system, and the coupling ratio of the biomass is high. The biomass is directly dried in the conveying process by extracting cold and hot furnace smoke without additionally arranging pre-drying equipment, and the biomass drying device is simple in structure, easy to operate, safe and explosion-proof and adjustable in the whole process; the furnace smoke is used as primary air, so that the coal powder burner is prevented from burning loss and deformation caused by blending and burning biomass; the biomass conveying pipeline isolation door and the combustor inlet primary air isolation door are arranged, so that the independent and flexible switching of pure-burning biomass or pulverized coal is realized, and because the biomass fuel and pulverized coal particles are coupled on the pulverized coal pipeline in front of the pulverized coal combustor, the two systems are relatively independent, and the actual transformation can be carried out under the condition of no furnace shutdown.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Wherein, 1 is a biomass raw material bin, 2 is a bin type material distributor, 3 is a primary crusher, 4 is a cover type belt conveyor, 5 is a secondary crusher, 6 is a screw conveyor, 7 is a biomass powder bin, 8 is a star-shaped feeder, 9 is a hot furnace smoke isolation door, 10 is a hot furnace smoke adjustment baffle, 11 is a hot furnace smoke pipeline, 12 is a cold furnace smoke isolation door, 13 is a cold furnace smoke adjustment baffle, 14 is a cold furnace smoke pipeline, 15 is a furnace smoke fan, 16 is a biomass fuel and conveying medium mixing front pipeline, 17 is a biomass fuel and conveying medium mixing rear pipeline, 18 is a biomass conveying pipeline isolation door, 19 is a pulverized coal conveying pipeline, 20 is a combustor inlet primary air isolation door, 21 is a hearth, 22 is a pulverized coal, 23 is a steering chamber, 24 is an air preheater, 25 is a dust remover, 26 is a cold primary air fan, 27 is a coal mill inlet cold primary air pipeline, a coal mill inlet primary air inlet isolation door, a coal inlet air inlet duct, a coal inlet duct outlet, 28 is a coal mill inlet cold primary air adjusting baffle, 29 is a coal mill inlet hot primary air pipeline, 30 is a coal mill inlet hot primary air adjusting baffle, 31 is a raw coal bunker, 32 is a coal feeder, 33 is a coal mill, and 34 is a coal powder conveying pipeline isolation door.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the biomass-coal independently operated pulverized coal boiler biomass coupled power generation system of the present invention includes a biomass raw material bin 1, a star feeder 8, an air preheater 24, a turning chamber 23, a biomass fuel and transport medium mixing front pipeline 16, a biomass fuel and transport medium mixing rear pipeline 17, a branch pipe, a pulverized coal transport pipeline 19, a coal mill 33, a furnace 21, a raw coal bin 31, a coal feeder 32, a primary cooling fan 26, a primary cooling air pipeline 27 at a coal mill inlet, a primary heating air pipeline 29 at a coal mill inlet, and a secondary cooling and heating air mixing pipeline at a coal mill inlet;
the outlet of the biomass raw material bin 1 is connected with the inlet of a star-shaped feeder 8 through a bin-type distributing machine 2, a primary crusher 3, a cover-type belt conveyor 4, a secondary crusher 5, a screw conveyor 6 and a biomass powder bin 7.
The outlet of the air preheater 24 and the turning chamber 23 are provided with a furnace smoke outlet, the furnace smoke outlet of the air preheater 24 is communicated with the inlet of the furnace smoke blower 15 through the cold furnace smoke isolation door 12, the cold furnace smoke adjusting baffle 13 and the cold furnace smoke pipeline 14, the furnace smoke outlet of the turning chamber 23 is communicated with the inlet of the furnace smoke blower 15 through the hot furnace smoke isolation door 9, the hot furnace smoke adjusting baffle 10 and the hot furnace smoke pipeline 11, the outlet of the furnace smoke blower 15 is communicated with the inlet of the pipeline 16 before mixing the biomass fuel and the conveying medium, and the outlet of the star-shaped feeder 8 is communicated with the inlet of the pipeline 16 before mixing the biomass fuel and the conveying medium.
The outlet of the biomass fuel and conveying medium mixing front pipeline 16 is communicated with a coal powder conveying pipeline 19 through a biomass fuel and conveying medium mixing rear pipeline 17 and a branch pipe, one end of the coal powder conveying pipeline 19 is communicated with the outlet of a coal mill 33, the other end of the coal powder conveying pipeline 19 is communicated with a coal powder burner 22 on a hearth 21, and a burner inlet primary air isolation door 20 is arranged at the inlet of the coal powder burner 22.
The outlet of the raw coal bunker 31 is connected to the fuel side inlet of a coal mill 33 via a coal feeder 32.
The outlet of the primary air cooler 26 is divided into two paths, wherein one path is connected with the air inlet of the air preheater 24, the other path is communicated with the inlet of the primary air cooler inlet pipeline 27 of the coal mill, the primary air cooler inlet pipeline 27 of the coal mill is provided with a primary air cooler regulating baffle 28 of the coal mill inlet, the air outlet of the air preheater 24 is communicated with the inlet of the primary air heater inlet pipeline 29 of the coal mill inlet, the primary air heater inlet pipeline 29 of the coal mill inlet is provided with a primary air cooler regulating baffle 30 of the coal mill inlet, the outlet of the primary air cooler inlet pipeline 27 of the coal mill inlet and the outlet of the primary air heater inlet pipeline 29 of the coal mill are communicated with the drying medium side inlet of the coal mill 33 through the mixed pipeline of the primary air cooler and the primary air heater of the coal mill inlet after being communicated with the pipeline.
The biomass particles with the particle size meeting the requirement are fully dried in the pipeline 17 after the biomass fuel and the conveying medium are mixed, and then enter the coal powder conveying pipeline 19 through the branch pipe, wherein the coal powder conveying system is completely isolated through the biomass conveying pipeline isolation doors 18, and the distances between the isolation doors and the coupling point are as short as possible so as to prevent the deposition of the coal powder or the biomass particles.
The branch pipes are provided with adjustable shrinkage holes, wherein the number of the branch pipes is the same as that of the pulverized coal conveying pipelines 19 and the data of the pulverized coal burners 22, the branch pipes correspond to the pulverized coal burners 22 one by one, and when the biomass is combusted, the output of each pulverized coal burner 22 on the same layer is balanced through the adjustable shrinkage holes.
And pressure measuring points and temperature measuring points are arranged on the cold furnace smoke pipeline 14, the hot furnace smoke pipeline 11, the biomass fuel and conveying medium mixed front pipeline 16, the biomass fuel and conveying medium mixed rear pipeline 17, the coal powder conveying pipeline 19 and the coal mill inlet cold and hot air mixed rear pipeline.
Flow measuring points are arranged on the biomass fuel and conveying medium mixing front pipeline 16 and the coal mill inlet cold and hot air mixing rear pipeline and are used for controlling the air speed of the conveying medium pipeline.
3 primary crushers 3 and 3 secondary crushers 5 are connected in parallel to meet the actual output requirement.
The bin type material distributor 2 and the cover type belt conveyor 4 are both provided with iron removal modules to remove iron-containing substances mixed in the biomass and avoid damage of cutters of the crusher.
Waste gas generated in the biomass crushing process is sent into a dust remover 25, and is purified and treated by the original environment-friendly facility to reach the standard and be discharged.
The specific working process of the invention is as follows:
when the biomass blending combustion system operates, the biomass conveying pipeline isolation door 18 is opened, the coal powder conveying pipeline isolation door 34 is closed, the original biomass stored in the biomass raw material bin 1 enters the primary crusher 3 for primary crushing through the primary iron removal of the bin type material distributor 2, the material is crushed to be less than 50mm in diameter, then enters the cover type belt conveyor 4 for two-stage iron removal, and then is sent into the secondary crusher 5 for crushing to be less than 2-5 mm in diameter, and the crushed biomass particles meeting the particle size requirement are sent into the biomass powder bin 7 for storage through the screw conveyor 6; the high-temperature furnace smoke output by the turning chamber 23 and the low-temperature furnace smoke output by the air preheater 24 are mixed and then are subjected to pressure boosting by the furnace smoke fan 15 to be used as a conveying medium of biomass particles; the biomass particles are sent into a pipeline 17 for drying after the biomass fuel and the conveying medium are mixed through a star-shaped feeder 8, and the temperature of the dried mixture is controlled to be above the corresponding dew point of the water vapor by adjusting the flow and the temperature of the mixed flue gas; the mixture of the biomass particles and the flue gas after being fully dried enters a hearth 21 through a branch pipe and a pulverized coal burner 22 for burning. The output of each pulverized coal burner 22 is balanced by adjusting the adjusting shrinkage cavity on the branch pipe, and the flow velocity of the flue gas in each branch pipe is controlled by adjusting the flow of the mixed flue gas.
When the coal burning system is running, the pulverized coal conveying pipe isolation door 34 is opened, and the biomass conveying pipe isolation door 18 is closed. The raw coal in the raw coal bin 31 enters a coal mill 33 through a coal feeder 32 to be pulverized, then is carried to the pulverized coal conveying pipeline 19 through dry air, and finally enters the pulverized coal burner 22 to be combusted.
The pulverized coal boiler is suitable for pulverized coal boilers with various combustion modes, has no special requirements on the types of agriculture and forestry biomass, only needs to meet the requirement that the particle size of the crushed biomass is less than 2-5 mm, and can reach about 20% of the mixed combustion proportion of the biomass when a layer of combustor is coupled.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A biomass and coal-fired independently-operated biomass coupling power generation system of a pulverized coal boiler is characterized by comprising a biomass raw material bin (1), a star-shaped feeder (8), an air preheater (24), a steering chamber (23), a biomass fuel and conveying medium mixed front pipeline (16), a biomass fuel and conveying medium mixed rear pipeline (17), a branch pipe, a pulverized coal conveying pipeline (19), a coal mill (33), a hearth (21), a raw coal bin (31), a coal feeder (32), a cold primary air fan (26), a coal mill inlet cold primary air pipeline (27), a coal mill inlet hot primary air pipeline (29) and a coal mill inlet cold and hot air mixed rear pipeline;
an outlet of the biomass raw material bin (1) is connected with an inlet of the star-shaped feeder (8); furnace smoke outlets are arranged at the outlet of the air preheater (24) and the turning chamber (23), the furnace smoke outlets of the air preheater (24) are communicated with the inlet of a furnace smoke fan (15), the furnace smoke outlets of the turning chamber (23) are communicated with the inlet of the furnace smoke fan (15), the outlet of the furnace smoke fan (15) is communicated with the inlet of a pipeline (16) before mixing the biomass fuel and the conveying medium, and the outlet of the star-shaped feeder (8) is communicated with the inlet of the pipeline (16) before mixing the biomass fuel and the conveying medium;
an outlet of a pipeline (16) before mixing the biomass fuel and the conveying medium is communicated with a coal powder conveying pipeline (19) through a pipeline (17) and a branch pipe after mixing the biomass fuel and the conveying medium, a biomass conveying pipeline isolation door (18) is arranged on the branch pipe, one end of the coal powder conveying pipeline (19) is communicated with an outlet of a coal mill (33), the other end of the coal powder conveying pipeline (19) is communicated with a coal powder burner (22) on a hearth (21), and a burner inlet primary air isolation door (20) is arranged at an inlet of the coal powder burner (22);
the outlet of the raw coal bin (31) is connected with the fuel side inlet of a coal mill (33) through a coal feeder (32);
the outlet of the primary cooling fan (26) is divided into two paths, wherein one path is connected with the air inlet of the air preheater (24), the other path is communicated with the inlet of the primary cooling air pipeline (27) at the inlet of the coal mill, the air outlet of the air preheater (24) is communicated with the inlet of the primary heating air pipeline (29) at the inlet of the coal mill, the outlet of the primary cooling air pipeline (27) at the inlet of the coal mill and the outlet of the primary heating air pipeline (29) at the inlet of the coal mill are communicated with the inlet of the drying medium side of the coal mill (33) through the pipeline after the pipeline is connected in parallel and the hot cooling air at the inlet of the coal mill are mixed.
2. The biomass and coal-fired coal-independently operated pulverized coal boiler biomass coupled power generation system according to claim 1, characterized in that an outlet of a biomass raw material bin (1) is connected with an inlet of a star-shaped feeder (8) through a bin-type distributor (2), a primary crusher (3), a cover-type belt conveyor (4), a secondary crusher (5), a screw conveyor (6) and a biomass powder bin (7).
3. The biomass-coal-independently-operated pulverized coal fired boiler biomass-coupled power generation system according to claim 1, wherein a furnace smoke extraction port of the air preheater (24) is communicated with an inlet of the furnace smoke blower (15) through the cold furnace smoke isolation door (12), the cold furnace smoke adjusting baffle (13) and the cold furnace smoke pipeline (14).
4. The biomass-coal-independently-operated pulverized coal-fired boiler biomass-coupled power generation system according to claim 1, wherein the furnace-pumping smoke port of the steering chamber (23) is communicated with the inlet of the furnace smoke blower (15) through the furnace smoke isolation door (9), the furnace smoke adjusting baffle (10) and the furnace smoke pipeline (11).
5. The biomass-coal independently operated pulverized coal fired boiler biomass coupled power generation system as claimed in claim 1, characterized in that the coal mill inlet cold primary air duct (27) is provided with a coal mill inlet cold primary air regulating baffle (28).
6. The biomass-coal-fired pulverized coal boiler biomass-coupled power generation system as claimed in claim 1, wherein a coal mill inlet hot primary air adjusting baffle (30) is arranged on a coal mill inlet hot primary air pipeline (29).
7. The biomass-coal-fired pulverized coal fired boiler biomass-coupled power generation system as claimed in claim 1, wherein the branch pipes are provided with adjustable shrinkage cavities.
8. The biomass-coal-independently-operated pulverized coal boiler biomass coupling power generation system according to claim 1, wherein a cold furnace flue pipe (14), a hot furnace flue pipe (11), a biomass fuel and conveying medium mixing front pipe (16), a biomass fuel and conveying medium mixing rear pipe (17), a pulverized coal conveying pipe (19) and a coal mill inlet cold and hot air mixing rear pipe are respectively provided with a pressure measuring point and a temperature measuring point.
9. The biomass-coal-independently-operated pulverized coal boiler biomass-coupled power generation system according to claim 1, wherein a flow measuring point is arranged on the biomass fuel and conveying medium mixing front pipeline (16) and the coal mill inlet cold and hot air mixing rear pipeline.
10. The biomass and coal-fired pulverized coal boiler biomass coupled power generation system as claimed in claim 1, wherein the bin type material distributor (2) and the hood type belt conveyor (4) are provided with iron removal modules.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115536482A (en) * | 2022-10-26 | 2022-12-30 | 安徽理工大学 | Method for preparing non-explosive crushing agent from biomass resources |
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Application publication date: 20210928 |