CN106221816A - The combustion gas of molding biomass combustion generation and the system and method for coal dust mixed power generation - Google Patents
The combustion gas of molding biomass combustion generation and the system and method for coal dust mixed power generation Download PDFInfo
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- CN106221816A CN106221816A CN201610832483.0A CN201610832483A CN106221816A CN 106221816 A CN106221816 A CN 106221816A CN 201610832483 A CN201610832483 A CN 201610832483A CN 106221816 A CN106221816 A CN 106221816A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
- C10J3/56—Apparatus; Plants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/22—Methods of steam generation characterised by form of heating method using combustion under pressure substantially exceeding atmospheric pressure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/12—Heating the gasifier
- C10J2300/1223—Heating the gasifier by burners
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1671—Integration of gasification processes with another plant or parts within the plant with the production of electricity
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The present invention uses recirculating fluidized bed to use molding biomass fuel, biomass energy is converted into high-temperature biomass gas, after high-temperature dust removal and heat exchange are lowered the temperature, by booster fan, biological fuel gas is sent into the gas burner being arranged on pulverized-coal fired boiler, mixed combustion is carried out with the high temperature coal dust in stove, to improve utilizing usefulness and utilizing efficient Thermal generation unit to carry out biomass and coal-fired cogeneration of biomass energy by gas burner.Native system is provided with biological fuel gas energy on-line measurement device, can effective on-line checking biological fuel gas heat energy in real time.The present invention preferably solves biomass electric power plant storage difficulty, occupation of land is big, it is low to use generating efficiency, this system makes full use of active service Thermal generation unit device and is shaped the generating of biomass fuel efficiently, also reduce the Coal-fired capacity of active service coal unit simultaneously, improve the low-load combustion-stabilizing of active service coal unit, underload ability and underload boiler efficiency.
Description
[technical field]
The invention belongs to biomass energy utilization technologies field, relate to a kind of molding biomass fuel in more detail in circulation
The combustion gas that in fluid bed, burning produces is sent in coal-burning boiler carry out electricity generation system and the method for cogeneration.
[background technology]
Biomass energy is a kind of reproducible carbon source, is one of country's energy advocating application.But it is the most commonly used
Biomass direct combustion power generation technology, there is many defects.Its power generation system structure is complicated, and floor space is huge, invests amount
Height, production run personnel are a lot of and operation expense remains high, and the low fuel consumption of comprehensive energy efficiency is high, and generating hour is restricted
In problems such as fuel seasonal supplies, the biomass direct-fired power plant of significant portion is caused to be difficult to tie up continuous existence.
[summary of the invention]
It is an object of the invention to provide in molding biomass fuel is joined recirculating fluidized bed by one and burn, after burning
The combustion gas produced is filled in coal-burning boiler, and the steam of coal-burning boiler drives steam turbine, steam turbine to drive generating set generating
Electricity generation system and method, to overcome many defects of biomass direct combustion power generation technology.
For achieving the above object, the present invention provides following technical scheme:
The electricity generation system of a kind of molding biomass fuel associating Thermal generation unit, including recirculating fluidized bed, separating at high temperature
Device, air heat exchanger, booster fan, gas burner, pulverized-coal fired boiler, steam turbine and electromotor；Molding biomass fuel is in institute
Stating burning in recirculating fluidized bed, the air vent of described recirculating fluidized bed is sequentially connected with described high-temperature separator, air heat exchanger, increasing
Pressure fan, gas burner and pulverized-coal fired boiler；Described high-temperature separator is for the combustion producing described recirculating fluidized bed air vent
Gas carries out dedusting；The air that described air heat exchanger sucks from air is through entering described recycle stream after high-temperature fuel gas heat exchange
Change the air inlet of bed；The high-temperature fuel gas discharged from described air heat exchanger is sequentially entered described combustion by after described booster fan supercharging
Air burner and pulverized-coal fired boiler；Described pulverized-coal fired boiler drives steam turbine to rotate, and described steam turbine drives described electrical power generators.
Further, the connecting line between described air heat exchanger and described booster fan is additionally provided with heat energy
Table.
Further, the water-cooling wall of described pulverized-coal fired boiler is painted with black matrix coating.
Further, air enters into the air temperature range in described recirculating fluidized bed after described air heat exchanger
It it is 250 DEG C～450 DEG C.
Further, the fuel gas temperature scope that combustion gas enters in described booster fan after described air heat exchanger is
400 DEG C～600 DEG C.
Molding biomass fuel burns in described recirculating fluidized bed and produces combustion gas, and combustion gas enters into described high-temperature separator
Separate dedusting；Combustion gas after dedusting enters into air heat exchanger and heats air, and the air after heating enters into recycle stream
Changing the air inlet of bed, the fuel gas temperature after heat exchange reduces substantially and is incited somebody to action by booster fan through heat energy meter measurement heat energy at 500 DEG C
Combustion gas be sent in gas burner so that with the coal dust mixed combustion in pulverized-coal fired boiler, pushing turbine rotates, and steam turbine carries
Dynamic electromotor generates electricity.
Said system uses CFBC molding biomass fuel, and burning is more abundant, and preferably solves
Use that generating efficiency is low, unit generation investment high, system constitute complicated too fat to move, production run personnel are many and operation expense is high
Shortcoming, organically combine with active service fire coal Generator Set, make full use of active service fire coal high-rating generator machine assemble
Putting high efficiency and be shaped the generating of biomass fuel, the application of the most this technology also reduces the fire coal of active service coal unit
Amount, improves the low-load combustion-stabilizing of active service coal unit, underload ability and underload boiler efficiency, improves active service coal-fired
The profitability of large-scale generating production unit, may advantageously facilitate the most stable of biomass and utilizes.
A kind of electricity generation system utilizing above-mentioned molding biomass fuel associating Thermal generation unit carries out the method generated electricity,
Comprise the following steps:
Step one, stores in molding biomass fuel is transported to fuel storage canopy；
Step 2, in molding biomass fuel is sent to recirculating fluidized bed by double-spiral feeder, burning produces high temperature
Biological fuel gas；
Step 3, carries out dust removal process to the high-temperature biomass gas produced in step 2；
Step 4, the high-temperature biomass gas after dust removal process passes through air heat exchanger and air heat-exchange, high-temperature biomass
Fuel gas temperature reduces, and air themperature raises；
Step 5, the air after heating up in step 4 enters into the air inlet of recirculating fluidized bed；
Step 6, the high-temperature biomass gas after step 4 heat exchange, booster fan it is transported to combustion after carrying out supercharging
Air burner；
Step 7, by gas burner by the high-temperature biomass gas after supercharging in step 6 and the height in pulverized-coal fired boiler
Temperature coal dust carries out mixed combustion, produces vapours；
Step 8, vapours pushing turbine rotates, and steam turbine drives electrical power generators.
Further, the air temperature range entering into recirculating fluidized bed air inlet in step 5 is 350 DEG C ± 100 DEG C.
Further, the temperature range of the high-temperature biomass gas after flowing through air heat exchanger in step 4 is 500 DEG C ±
100℃。
Further, the heat energy of the high-temperature biomass gas before entering into booster fan in step 6 is measured, adopts
Measure with heat energy meter.
Further, the water-cooling wall surrounding on pulverized-coal fired boiler upper strata scribbles black matrix coating.
The air themperature that will go into recirculating fluidized bed air inlet is heated to about 350 DEG C, beneficially biomass fuel
Burning, it is possible to produce more combustible gas and the quality of combustible gas can be improved.
The high-temperature biomass gas that CFBC molding biomass fuel produces, through high-temperature separator dedusting
After, enter air heat exchanger and air is heated and high-temperature biomass gas temperature is reduced to about 500 DEG C, utilize heat
Table the intensified blower fan of combustion gas after the heat energy measurement of biological fuel gas can be sent into the gas burner being arranged on pulverized-coal fired boiler,
The mixed combustion of biological fuel gas and coal dust is carried out, to improving biomass energy by gas burner and the high temperature coal dust in stove
Utilize usefulness and utilize efficient Thermal generation unit to carry out biomass power generation.
Owing to the biomass fuel temperature being input in gas burner is at about 500 DEG C, use the biology of higher temperature
Matter combustion gas sends in pulverized-coal fired boiler the mixed combustion carrying out coal dust and combustion gas by gas burner, it is to avoid the analysis of biomass coke tar
Go out, also improve the high-effect utilization of biomass energy simultaneously.High-temperature field within pulverized-coal fired boiler and enough burn sky
Between so that tar and the flying dust carbon do not separated in biological fuel gas can preferably be burnt.
The addition of high-temperature biomass gas, improves the combustion stability of coal dust, is conducive to improving the low negative of boiler controller system
Lotus surely fires ability, underload ability and the boiler efficiency of underload.
Due to the addition of high-temperature biomass gas, by the flame in combustion-supporting burner hearth, it is possible to cause furnace outlet flue gas temperature
The rising of degree, water-cooling wall local four peripheral wall surfaces on burner top, upper strata spray black matrix coating, with the spoke of fortified water cold wall
Penetrate heat absorption capacity, maintain furnace exit temperature to be basically unchanged before comparing transformation.Special gas burner and burner arrangement position
Put and ensure that the trouble-free burning of biological fuel gas and avoid the impact on original combustion conditions, and make the coal dust of suspension combustion
Burning is further strengthened, and improve coke in stove burns degree.Simultaneously as the vicarious function of biological fuel gas,
Also the Coal-fired capacity making boiler is reduced accordingly, and the plant consumption of subsidiary engine slightly reduces.
This technology uses Combustion technology of circulating fluidized, and molding biomass fuel is converted into the biomass fuel of burning
Gas, and by this combustion gas directly by the gas burner that is arranged on coal-burning boiler send in active service pulverized-coal fired boiler with high temperature coal dust
Carry out mixed combustion, utilize the Large Efficient generating set of active service to carry out biomass transformation of energy, be no longer separately provided biomass steam
Boiler, turbine generator group, tail flue gas processing system and a feeding distribution system；Simultaneously because employing shaped fuel, decrease
Biomass fuel stores transport and the feed of occupation of land, beneficially biomass fuel, also makes the feed of biomass no longer be limited by
Seasonal；And owing to using fluidized bed combustion so that low heat value biomass fuel can also obtain good answering
With, expand the adaptability to biomass fuel.Use adiabatic fluidized bed combustion mode, in stove, there is no heating surface, it is to avoid
The problems such as the abrasion of biomass direct-combustion boiler and corrosion booster, improve the effectively utilization hour of device.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the electricity generation system of molding biomass fuel of the present invention associating Thermal generation unit.
Description of reference numerals is as follows:
1-recirculating fluidized bed；2-high-temperature separator；3-air heat exchanger；4-booster fan；5-gas burner；6-coal dust
Boiler；7-steam turbine；8-electromotor；9-heat energy meter.
[detailed description of the invention]
For making the object, technical solutions and advantages of the present invention clearer, technical scheme will be carried out below
Detailed description.Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained owning on the premise of not making creative work
Other embodiment, broadly falls into the scope that the present invention is protected.
As it is shown in figure 1, the invention provides the electricity generation system of a kind of molding biomass fuel 8 groups of coal fired power generation machine of associating,
Including recirculating fluidized bed 1, high-temperature separator 2, air heat exchanger 3, booster fan 4, gas burner 5, pulverized-coal fired boiler 6, steamer
Machine 7 and electromotor 8；Molding biomass fuel burns in described recirculating fluidized bed 1, and the air vent of described recirculating fluidized bed 1 depends on
The described high-temperature separator of secondary connection 2, air heat exchanger 3, booster fan 4, gas burner 5 and pulverized-coal fired boiler 6；Described high temperature divides
Dedusting is carried out for the combustion gas that described recirculating fluidized bed 1 air vent is produced from device 2；Described air heat exchanger 3 is inhaled from air
The air entered is through entering the air inlet of described recirculating fluidized bed 1 after high-temperature fuel gas heat exchange；Discharge from described air heat exchanger 3
High-temperature fuel gas by sequentially entering described gas burner 5 and pulverized-coal fired boiler 6 after the supercharging of described booster fan 4；Described coal dust pot
Stove 6 drives steam turbine 7 to rotate, and described steam turbine 7 drives described electromotor 8 to generate electricity.In described air heat exchanger 3 and described supercharging
Heat energy meter 9 it is additionally provided with on connecting line between blower fan 4.
Molding biomass fuel burns in described recirculating fluidized bed 1 and produces combustion gas, and combustion gas enters into described separating at high temperature
Device 2 separates dedusting；Combustion gas after dedusting enters into air heat exchanger 3 and heats air, and the air after heating enters into and follows
The air inlet of ring fluid bed 1, the fuel gas temperature after heat exchange reduces substantially measures heat energy and by supercharging at 500 DEG C through heat energy meter 9
In combustion gas is sent to gas burner 5 by blower fan 4 so with the coal dust mixed combustion in pulverized-coal fired boiler 6, pushing turbine 7 turns
Dynamic, steam turbine 7 drives electromotor 8 to generate electricity.
The electricity generation system utilizing above-mentioned molding biomass fuel 8 groups of coal fired power generation machine of associating carries out the method generated electricity, bag
Include following steps:
Step one, stores in molding biomass fuel is transported to fuel storage canopy；
Step 2, in molding biomass fuel is sent to recirculating fluidized bed 1 by double-spiral feeder, burning produces height
Temperature biological fuel gas；
Step 3, carries out dust removal process to the high-temperature biomass gas produced in step 2；
Step 4, the high-temperature biomass gas after dust removal process passes through air heat exchanger 3 and air heat-exchange, high-temperature biomass
Fuel gas temperature reduces, and air themperature raises；
Step 5, the air after heating up in step 4 enters into the air inlet of recirculating fluidized bed 1；
Step 6, the high-temperature biomass gas after step 4 heat exchange, booster fan 4 it is transported to combustion after carrying out supercharging
Air burner 5；
Step 7, by gas burner 5 by the high-temperature biomass gas after supercharging in step 6 and pulverized-coal fired boiler 6
High temperature coal dust carries out mixed combustion, produces vapours；
Step 8, vapours pushing turbine 7 rotates, and steam turbine 7 drives electromotor 8 to generate electricity.
Said system uses recirculating fluidized bed 1 to burn molding biomass fuel, and burning is more abundant, and preferably solves
Use that generating efficiency is low, unit generation investment high, system constitute complicated too fat to move, production run personnel are many and operation expense is high
Shortcoming, organically combine with active service fire coal high-rating generator 8 groups, make full use of active service fire coal high-rating generator 8 unit
Device high efficiency is shaped the generating of biomass fuel, and the application of the most this technology also reduces the combustion of active service coal unit
Coal amount, improves the low-load combustion-stabilizing of active service coal unit, underload ability and underload boiler efficiency, improves active service combustion
The profitability of coal large-scale generating production unit, may advantageously facilitate the most stable of biomass and utilizes.
The present invention is not limited to above-mentioned preferred forms, and those of ordinary skill in the art may be used under the enlightenment of the present invention
Draw other various forms of products and methods, no matter but making any obvious change or side in its shape, structure
The technique making any equivalent in method is all protection scope of the present invention, every have same as the present application or akin
Technical scheme, within all falling within protection scope of the present invention.
Claims (10)
1. the electricity generation system of molding biomass fuel associating Thermal generation unit, it is characterised in that include recirculating fluidized bed,
High-temperature separator, air heat exchanger, booster fan, gas burner, pulverized-coal fired boiler, steam turbine and electromotor；Molding biomass
Fuel burns in described recirculating fluidized bed, and the air vent of described recirculating fluidized bed is sequentially connected with described high-temperature separator, air
Heat exchanger, booster fan, gas burner and pulverized-coal fired boiler；Described high-temperature separator is for described recirculating fluidized bed air vent
The combustion gas produced carries out dedusting；The air that described air heat exchanger sucks from air is through entering institute after high-temperature fuel gas heat exchange
State the air inlet of recirculating fluidized bed；The high-temperature fuel gas discharged from described air heat exchanger is entered successively by after described booster fan supercharging
Enter described gas burner and pulverized-coal fired boiler；Described pulverized-coal fired boiler drives steam turbine to rotate, and described steam turbine drives described generating
Machine generates electricity.
The electricity generation system of molding biomass fuel the most according to claim 1 associating Thermal generation unit, it is characterised in that
It is additionally provided with heat energy meter on connecting line between described air heat exchanger and described booster fan.
The electricity generation system of molding biomass fuel the most according to claim 1 associating Thermal generation unit, it is characterised in that
Black matrix coating it is painted with on the water-cooling wall of described pulverized-coal fired boiler.
4. the electricity generation system of Thermal generation unit is combined according to the molding biomass fuel described in any one of claims 1 to 3, its
Being characterised by, it is 250 DEG C that air enters into the air temperature range in described recirculating fluidized bed after described air heat exchanger
～450 DEG C.
5. the electricity generation system of Thermal generation unit is combined according to the molding biomass fuel described in any one of claims 1 to 3, its
Be characterised by, combustion gas enter into after described air heat exchanger the fuel gas temperature scope in described booster fan be 400 DEG C～
600℃。
6. the generating system of the molding biomass fuel associating Thermal generation unit that a kind utilizes described in any one of claim 1 to 5
The method that system carries out generating electricity, it is characterised in that comprise the following steps:
Step one, stores in molding biomass fuel is transported to fuel storage canopy；
Step 2, in molding biomass fuel is sent to recirculating fluidized bed by double-spiral feeder, burning produces high-temperature biological
Matter combustion gas；
Step 3, carries out dust removal process to the high-temperature biomass gas produced in step 2；
Step 4, the high-temperature biomass gas after dust removal process passes through air heat exchanger and air heat-exchange, high-temperature biomass gas
Temperature reduces, and air themperature raises；
Step 5, the air after heating up in step 4 enters into the air inlet of recirculating fluidized bed；
Step 6, the high-temperature biomass gas after step 4 heat exchange, booster fan it is transported to combustion gas combustion after carrying out supercharging
Burner；
Step 7, by gas burner by the high-temperature biomass gas after supercharging in step 6 and the high-temperature coal in pulverized-coal fired boiler
Powder carries out mixed combustion, produces vapours；
Step 8, vapours pushing turbine rotates, and steam turbine drives electrical power generators.
The electricity generation system utilizing molding biomass fuel associating Thermal generation unit the most according to claim 6 generates electricity
Method, it is characterised in that the air temperature range entering into recirculating fluidized bed air inlet in step 5 is 350 DEG C ± 100 DEG C.
The electricity generation system utilizing molding biomass fuel associating Thermal generation unit the most according to claim 6 generates electricity
Method, it is characterised in that step 4 flows through the temperature range of the high-temperature biomass gas after air heat exchanger be 500 DEG C ±
100℃。
The electricity generation system utilizing molding biomass fuel associating Thermal generation unit the most according to claim 6 generates electricity
Method, it is characterised in that the heat energy of the high-temperature biomass gas before entering into booster fan in step 6 is measured, adopts
Measure with heat energy meter.
The electricity generation system utilizing molding biomass fuel associating Thermal generation unit the most according to claim 6 carries out sending out
The method of electricity, it is characterised in that the water-cooling wall surrounding on pulverized-coal fired boiler upper strata scribbles black matrix coating.
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Cited By (6)
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| CN107245353A (en) * | 2017-07-21 | 2017-10-13 | 中国华能集团清洁能源技术研究院有限公司 | Gasification of biomass CFBB combined generating system and method for work |
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| CN109139158A (en) * | 2018-08-06 | 2019-01-04 | 山东电力工程咨询院有限公司 | Utilize the system and method for biogas sensible heat and smoke evaporative emission reduction desulfurization wastewater |
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