CN111075566A - Biomass gas and natural gas coupling power generation device - Google Patents

Biomass gas and natural gas coupling power generation device Download PDF

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Publication number
CN111075566A
CN111075566A CN201811212573.5A CN201811212573A CN111075566A CN 111075566 A CN111075566 A CN 111075566A CN 201811212573 A CN201811212573 A CN 201811212573A CN 111075566 A CN111075566 A CN 111075566A
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gas
biomass
power generation
gas turbine
biomass gasification
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蔡磊
郑莉
管延文
刘文斌
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02CGAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10JPRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02Fixed-bed gasification of lump fuel
    • C10J3/20Apparatus; Plants
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10JPRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46Gasification of granular or pulverulent flues in suspension
    • C10J3/54Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
    • C10J3/56Apparatus; Plants
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10JPRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72Other features
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10JPRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72Other features
    • C10J3/82Gas withdrawal means
    • C10J3/84Gas withdrawal means with means for removing dust or tar from the gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10Adaptations for driving, or combinations with, electric generators
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10JPRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00Details of gasification processes
    • C10J2300/09Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0903Feed preparation
    • C10J2300/0909Drying
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10JPRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00Details of gasification processes
    • C10J2300/09Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913Carbonaceous raw material
    • C10J2300/0916Biomass
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10JPRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00Details of gasification processes
    • C10J2300/16Integration of gasification processes with another plant or parts within the plant
    • C10J2300/1603Integration of gasification processes with another plant or parts within the plant with gas treatment
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10JPRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00Details of gasification processes
    • C10J2300/16Integration of gasification processes with another plant or parts within the plant
    • C10J2300/1671Integration of gasification processes with another plant or parts within the plant with the production of electricity
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/10Biofuels, e.g. bio-diesel
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/141Feedstock
    • Y02P20/145Feedstock the feedstock being materials of biological origin

Abstract

The invention discloses a biomass gas and natural gas coupling power generation device, which comprises a combined cycle power generation device and a biomass gasification device; the combined cycle power generation device comprises a gas compressor, a gas turbine combustion chamber, a gas turbine, a separator, a waste heat boiler, a steam turbine, a condenser and a water pump; the biomass gasification device comprises a biomass charging hopper, a biomass gasification furnace, a cyclone separator and a gas compressor; the invention utilizes the high-temperature flue gas at the outlet of the gas turbine as the gasifying agent for biomass gasification, provides heat for the gasification process, does not need to utilize an external heat source to provide heat for the biomass gasification process, greatly reduces the energy consumption of biomass gasification, and uses the mixed combustion of the gasified biomass gas and natural gas for combined cycle power generation, thereby realizing the high-efficiency utilization of biomass energy and improving the comprehensive utilization efficiency of energy of a natural gas power plant.

Description

Biomass gas and natural gas coupling power generation device
Technical Field
The invention belongs to the field of biomass gasification power generation, and particularly relates to a biomass gas and natural gas coupling power generation device and method.
Background
At present, the contradiction between the continuous rise of global energy demand and the shortage of fossil energy is becoming more acute. The biomass energy is the fourth largest energy next to coal, petroleum and natural gas due to abundant content and CO2Zero emission and the like, and the method becomes an ideal choice for supporting the sustainable development of global economy.
The biomass comprises not only the original agricultural, forestry and aquatic resources such as crops, wood, seaweed and the like, but also industrial organic wastes such as paper pulp wastes, alcohol fermentation residues and the like, municipal domestic wastes, sludge, human and animal excreta and the like. The biomass resource has the advantages of abundant reserves, wide distribution, renewability, storability, utilization technology diversity and the like.
The biomass gasification power generation technology is an important way for high-efficiency clean utilization of biomass energy, and has the characteristics of 3 aspects, namely good flexibility of ① technology, good cleanness of ②, and effective reduction of SO (SO), wherein the biomass gasification power generation technology can adopt a gas turbine, an internal combustion engine, a waste heat boiler and a steam power generation system, and can also adopt an internal combustion engine as well as a waste heat boiler and a steam power generation system, and the biomass gasification power generation technology has good cleanness and can effectively reduce SO2The emission of harmful gases, the general temperature of the gasification process is lower, NO2Is very small in the amount of produced, so that NO can be effectively controlled2The method has good ③ economy, and the biomass gasification power generation technology is flexible and simple and has more investment than other renewable energy power generation technologiesThe small and current biomass gasification technology still faces some problems, such as the need of providing high gasification temperature and a gasifying agent, and the realization of the efficient gasification of biomass at low cost is a big hotspot at present.
The natural gas power plant has the advantages of rapid start and stop, flexible operation mode, high energy utilization efficiency, low manufacturing cost, small plant area, cleanness, environmental protection and the like. Although natural gas power generation has many advantages, the cost is higher than that of developed and improved coal-fired power generation, and the price of natural gas influences the economy of gas power generation. The high price of natural gas determines the high cost of natural gas power generation fuel at present. If biomass fuel gas is coupled with natural gas for combined cycle power generation, the power generation cost can be effectively reduced.
Disclosure of Invention
The invention solves the problems that in the prior art, in the biomass gas power generation process, the gasification energy is provided by an additional external heating source, the process for preparing the gasifying agent by using the gasifying agents such as oxygen, steam and the like is complex and expensive, and the technical problem of high natural gas power generation cost, and simultaneously solves the technical problem of biomass utilization, and effectively utilizes biomass energy.
According to a first aspect of the invention, a biomass gas and natural gas coupled power generation device is provided, which comprises a combined cycle power generation device and a biomass gasification device; the combined cycle power generation device comprises a gas compressor, a gas turbine combustion chamber, a gas turbine, a separator, a waste heat boiler, a steam turbine, a condenser and a water pump; the biomass gasification device comprises a biomass charging hopper, a biomass gasification furnace, a cyclone separator and a gas compressor;
the outlet end of the air compressor is connected with a combustion chamber of the gas turbine, and the air compressor is used for compressing air and then conveying the compressed air to the combustion chamber of the gas turbine to serve as a combustion oxidant; the outlet end of the combustion chamber of the gas turbine is connected with a gas turbine, and the gas turbine is used for expanding and applying work on the flue gas generated by combustion to drive a generator to generate electricity; the outlet end of the gas turbine is connected with a separator; the outlet end of the separator is respectively connected with the waste heat boiler and the biomass gasification furnace, and the separator is used for respectively conveying the flue gas at the outlet of the gas turbine to the waste heat boiler and the biomass gasification furnace; the waste heat boiler is used for exchanging heat between the flue gas and water to generate steam to drive the steam turbine to generate electricity; the condenser is connected with the steam turbine and is used for condensing the water vapor into liquid; the water pump is connected with the condenser and used for pumping liquid water into the waste heat boiler;
the biomass gasification furnace is connected with the biomass feeding hopper and is used for gasifying the biomass raw material by using the flue gas input by the separator and providing heat for the biomass gasification process; the cyclone separator is connected with the biomass gasification furnace, and is used for separating solid ash from biomass gas and conveying the biomass gas to the gas compressor for compression; the gas turbine combustor is used for burning the natural gas of external input and the biomass gas of gas compressor input.
Preferably, the biomass gasification apparatus further comprises a dryer; the dryer is connected between the biomass feeding hopper and the biomass gasification furnace, and is used for drying the biomass raw material by using the flue gas subjected to heat exchange in the waste heat boiler.
Preferably, the biomass gasification device further comprises an ash residue waste heat utilization device and an ash residue collection device; the ash residue waste heat utilization device is connected with the cyclone separator; the ash collecting device is connected with the ash waste heat utilization device.
Preferably, the biomass gasification furnace is a fixed bed gasification furnace or a fluidized bed gasification furnace.
Preferably, a mixing chamber is arranged between the gas compressor and the gas turbine combustion chamber, and the mixing chamber is used for uniformly mixing the biomass gas and the natural gas and then introducing the mixture into the gas turbine combustion chamber for combustion.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
(1) the invention provides a biomass gas and natural gas coupled power generation device, which is coupled with a biomass gasification module on the basis of the existing natural gas combined cycle power generation, uses high-temperature flue gas in the combined cycle power generation process for biomass gasification, and uses the biomass gas obtained by gasification for combined cycle power generation. The system improves the utilization efficiency of energy sources and reduces the investment of a biomass comprehensive utilization system. The biomass gasification process does not need external heat supply, the gasification reaction can be completed by using high-temperature flue gas at the outlet of the turbine, the energy consumption of the biomass gasification furnace during operation is greatly reduced, and the power generation efficiency of the system is improved. Because biomass raw materials are low in price compared with natural gas, the power generation cost of a natural gas power plant is reduced by coupling biomass fuel gas with natural gas for power generation, the utilization rate of renewable energy sources is improved, and the problem that municipal waste and other biomass are difficult to treat is solved.
(2) In the invention, the most economical and efficient form of natural gas power generation, namely gas and steam combined cycle power generation, is utilized, and the natural gas power generation efficiency is very high and is over 50 percent in common. The temperature of the flue gas at the outlet of the gas turbine is between 450 and 650 ℃, the temperature of the tail flue gas of some gas turbines can reach above 700 ℃, and the high-temperature flue gas is used for biomass gasification, so that heat is not required to be supplied from the outside in the biomass gasification process, the input of energy of the biomass gasification part is greatly reduced, and the system efficiency is improved. The invention utilizes the high-temperature flue gas at the outlet of the gas turbine as the biomass gasifying agent, and the combustible component content after gasification is high. The biomass gasification reaction is directly provided with heat by utilizing the high-temperature flue gas, the gasification reaction is favorably carried out, the gasification reaction is more fully carried out, and the gas heat value and the gasification efficiency are improved. The biomass gas generated by gasification is used as the raw material of the gas turbine for combustion, so that the sustainable utilization of the biomass is realized. On the other hand, the temperature of the flue gas at the outlet of the waste heat boiler is mostly above 100 ℃, and the low-temperature flue gas is used for drying the biomass raw material, so that the energy utilization efficiency can be improved. The biomass drying and preheating device fully utilizes the waste heat carried by the waste flue gas in the combustion process to dry and preheat biomass raw materials, reduces the energy consumption required for drying biomass, realizes the efficient utilization of the waste heat, and reduces the cost of power generation. Therefore, the biomass gasification and the combined cycle power generation of the natural gas power plant are combined, and the method has positive significance for biomass resource utilization and reduction of the power generation cost of the natural gas power plant.
(3) The invention relates to a high-efficiency clean energy utilization device for biomass gasification and natural gas coupling power generation, which creatively combines a combined cycle power generation technology and a biomass gasification technology, comprises two clean energy sources of biomass and natural gas and is a novel, high-efficiency, energy-saving and environment-friendly energy utilization system. The coupling power generation method solves the problem of high investment cost of simply building a biomass power plant, fully utilizes the existing power generation equipment of a large-scale natural gas power plant, reduces equipment investment and increases enterprise income.
(4) The invention utilizes biomass with high efficiency and low energy consumption, improves the utilization rate of renewable energy sources and protects the ecological environment. The invention can treat municipal domestic garbage, industrial garbage, sludge and the like, solves the problem that the garbage and the sludge are difficult to treat, recycles the biomass such as the garbage and the sludge, and improves the comprehensive utilization efficiency of the energy of the natural gas power plant.
(5) The invention fully utilizes the heat carried by the ash generated in the biomass gasification process, and the ash waste heat utilization device can use the heat carried by the ash waste heat utilization device for air preheating, waste heat power generation, domestic hot water supply and the like; the ash collecting system can realize comprehensive utilization of ash after biomass gasification, can be returned to fields or used in industry, and the like, and fully utilizes resources and energy.
Drawings
FIG. 1 is a schematic view of a biomass gas and natural gas coupled power generation device, wherein: the biomass gasification system comprises a gas compressor 1, a gas turbine combustion chamber 2, a gas turbine 3, a separator 4, a waste heat boiler 5, a steam turbine 6, a condenser 7, a water pump 8, a biomass charging hopper 9, a biomass gasification furnace 10, a cyclone separator 11, a gas compressor 12, a dryer 13, an ash residue waste heat utilization device 14, an ash residue collection device 15 and a mixing chamber 16.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
A biomass gas and natural gas coupling power generation device comprises a combined cycle power generation device and a biomass gasification device; the combined cycle power generation device comprises a gas compressor 1, a gas turbine combustion chamber 2, a gas turbine 3, a separator 4, a waste heat boiler 5, a steam turbine 6, a condenser 7 and a water pump 8; the biomass gasification device comprises a biomass charging hopper 9, a biomass gasification furnace 10, a cyclone separator 11 and a fuel gas compressor 12;
the outlet end of the air compressor 1 is connected with a combustion chamber 2 of the gas turbine, and the air compressor 1 is used for compressing air and then conveying the air to the combustion chamber 2 of the gas turbine to serve as a combustion oxidant; the outlet end of the gas turbine combustion chamber 2 is connected with a gas turbine 3, and the gas turbine 3 is used for expanding the flue gas generated by combustion to do work and driving a generator to generate electricity; the outlet end of the gas turbine 3 is connected with a separator 4; the outlet end of the separator 4 is respectively connected with the waste heat boiler 5 and the biomass gasification furnace 10, and the separator 4 is used for respectively conveying the flue gas at the outlet of the gas turbine 3 to the waste heat boiler 5 and the biomass gasification furnace 10; the waste heat boiler 5 is used for exchanging heat between the flue gas and water to generate steam to drive the steam turbine 6 to generate power; the condenser 7 is connected with the steam turbine 6 and is used for condensing the water vapor into liquid; the water pump 8 is connected with the condenser 7 and used for pumping liquid water into the waste heat boiler 5;
the biomass gasification furnace 10 is connected with the biomass charging hopper 9, and the biomass gasification furnace 10 is used for gasifying biomass raw materials by using the flue gas input by the separator 4 and providing heat for the biomass gasification process; the cyclone separator 11 is connected with the biomass gasification furnace 10, and the cyclone separator 11 is used for separating solid ash from biomass gas and conveying the biomass gas to the gas compressor 12 for compression; gas compressor 12 is connected with gas turbine combustor 2, gas compressor 12 is arranged in carrying compressed biomass gas to gas turbine combustor 2, gas turbine combustor 2 is arranged in burning the natural gas of outside input and the biomass gas of gas compressor 12 input, and natural gas and biomass gas directly get into gas turbine combustor 2 respectively and burn as fuel.
Example 2
A biomass gas and natural gas coupling power generation device comprises a combined cycle power generation device and a biomass gasification device; the combined cycle power generation device comprises a gas compressor 1, a gas turbine combustion chamber 2, a gas turbine 3, a separator 4, a waste heat boiler 5, a steam turbine 6, a condenser 7 and a water pump 8; the biomass gasification device comprises a biomass charging hopper 9, a biomass gasification furnace 10, a cyclone separator 11 and a fuel gas compressor 12;
the outlet end of the air compressor 1 is connected with a combustion chamber 2 of the gas turbine, and the air compressor 1 is used for compressing air and then conveying the air to the combustion chamber 2 of the gas turbine to serve as a combustion oxidant; the outlet end of the gas turbine combustion chamber 2 is connected with a gas turbine 3, and the gas turbine 3 is used for expanding the flue gas generated by combustion to do work and driving a generator to generate electricity; the outlet end of the gas turbine 3 is connected with a separator 4; the outlet end of the separator 4 is respectively connected with the waste heat boiler 5 and the biomass gasification furnace 10, and the separator 4 is used for respectively conveying the flue gas at the outlet of the gas turbine 3 to the waste heat boiler 5 and the biomass gasification furnace 10; the waste heat boiler 5 is used for exchanging heat between the flue gas and water to generate steam to drive the steam turbine 6 to generate power; the condenser 7 is connected with the steam turbine 6 and is used for condensing the water vapor into liquid; the water pump 8 is connected with the condenser 7 and used for pumping liquid water into the waste heat boiler 5;
the biomass gasification furnace 10 is connected with the biomass charging hopper 9, and the biomass gasification furnace 10 is used for gasifying biomass raw materials by using the flue gas input by the separator 4 and providing heat for the biomass gasification process; the cyclone separator 11 is connected with the biomass gasification furnace 10, and the cyclone separator 11 is used for separating solid ash from biomass gas and conveying the biomass gas to the gas compressor 12 for compression; gas compressor 12 is connected with gas turbine combustor 2, gas compressor 12 is arranged in carrying compressed biomass gas to gas turbine combustor 2, gas turbine combustor 2 is arranged in burning the natural gas of external input and the biomass gas of gas compressor 12 input.
The biomass gasification apparatus further comprises a dryer 13; the dryer 13 is connected between the biomass charging hopper 9 and the biomass gasification furnace 10, and the dryer 13 is used for drying the biomass raw material by using the flue gas after heat exchange in the waste heat boiler 5.
Example 3
A biomass gas and natural gas coupling power generation device comprises a combined cycle power generation device and a biomass gasification device; the combined cycle power generation device comprises a gas compressor 1, a gas turbine combustion chamber 2, a gas turbine 3, a separator 4, a waste heat boiler 5, a steam turbine 6, a condenser 7 and a water pump 8; the biomass gasification device comprises a biomass charging hopper 9, a biomass gasification furnace 10, a cyclone separator 11 and a fuel gas compressor 12;
the outlet end of the air compressor 1 is connected with a combustion chamber 2 of the gas turbine, and the air compressor 1 is used for compressing air and then conveying the air to the combustion chamber 2 of the gas turbine to serve as a combustion oxidant; the outlet end of the gas turbine combustion chamber 2 is connected with a gas turbine 3, and the gas turbine 3 is used for expanding the flue gas generated by combustion to do work and driving a generator to generate electricity; the outlet end of the gas turbine 3 is connected with a separator 4; the outlet end of the separator 4 is respectively connected with the waste heat boiler 5 and the biomass gasification furnace 10, and the separator 4 is used for respectively conveying the flue gas at the outlet of the gas turbine 3 to the waste heat boiler 5 and the biomass gasification furnace 10; the waste heat boiler 5 is used for exchanging heat between the flue gas and water to generate steam to drive the steam turbine 6 to generate power; the condenser 7 is connected with the steam turbine 6 and is used for condensing the water vapor into liquid; the water pump 8 is connected with the condenser 7 and used for pumping liquid water into the waste heat boiler 5;
the biomass gasification furnace 10 is connected with the biomass charging hopper 9, and the biomass gasification furnace 10 is used for gasifying biomass raw materials by using the flue gas input by the separator 4 and providing heat for the biomass gasification process; the cyclone separator 11 is connected with the biomass gasification furnace 10, and the cyclone separator 11 is used for separating solid ash from biomass gas and conveying the biomass gas to the gas compressor 12 for compression; gas compressor 12 is connected with gas turbine combustor 2, gas compressor 12 is arranged in carrying compressed biomass gas to gas turbine combustor 2, gas turbine combustor 2 is arranged in burning the natural gas of external input and the biomass gas of gas compressor 12 input.
The biomass gasification apparatus further comprises a dryer 13; the dryer 13 is connected between the biomass charging hopper 9 and the biomass gasification furnace 10, and the dryer 13 is used for drying the biomass raw material by using the flue gas after heat exchange in the waste heat boiler 5.
The biomass gasification device also comprises an ash residue waste heat utilization device 14 and an ash residue collection device 15; the ash residue waste heat utilization device 14 is connected with the cyclone separator 11; the ash collecting device 15 is connected with the ash waste heat utilization device 14.
Example 4
A biomass gas and natural gas coupling power generation device comprises a combined cycle power generation device and a biomass gasification device; the combined cycle power generation device comprises a gas compressor 1, a gas turbine combustion chamber 2, a gas turbine 3, a separator 4, a waste heat boiler 5, a steam turbine 6, a condenser 7 and a water pump 8; the biomass gasification device comprises a biomass charging hopper 9, a biomass gasification furnace 10, a cyclone separator 11 and a fuel gas compressor 12;
the outlet end of the air compressor 1 is connected with a combustion chamber 2 of the gas turbine, and the air compressor 1 is used for compressing air and then conveying the air to the combustion chamber 2 of the gas turbine to serve as a combustion oxidant; the outlet end of the gas turbine combustion chamber 2 is connected with a gas turbine 3, and the gas turbine 3 is used for expanding the flue gas generated by combustion to do work and driving a generator to generate electricity; the outlet end of the gas turbine 3 is connected with a separator 4; the outlet end of the separator 4 is respectively connected with the waste heat boiler 5 and the biomass gasification furnace 10, and the separator 4 is used for respectively conveying the flue gas at the outlet of the gas turbine 3 to the waste heat boiler 5 and the biomass gasification furnace 10; the waste heat boiler 5 is used for exchanging heat between the flue gas and water to generate steam to drive the steam turbine 6 to generate power; the condenser 7 is connected with the steam turbine 6 and is used for condensing the water vapor into liquid; the water pump 8 is connected with the condenser 7 and used for pumping liquid water into the waste heat boiler 5;
the biomass gasification furnace 10 is connected with the biomass charging hopper 9, and the biomass gasification furnace 10 is used for gasifying biomass raw materials by using the flue gas input by the separator 4 and providing heat for the biomass gasification process; the cyclone separator 11 is connected with the biomass gasification furnace 10, and the cyclone separator 11 is used for separating solid ash from biomass gas and conveying the biomass gas to the gas compressor 12 for compression; gas compressor 12 is connected with gas turbine combustor 2, gas compressor 12 is arranged in carrying compressed biomass gas to gas turbine combustor 2, gas turbine combustor 2 is arranged in burning the natural gas of external input and the biomass gas of gas compressor 12 input.
The biomass gasification apparatus further comprises a dryer 13; the dryer 13 is connected between the biomass charging hopper 9 and the biomass gasification furnace 10, and the dryer 13 is used for drying the biomass raw material by using the flue gas after heat exchange in the waste heat boiler 5.
The biomass gasification device also comprises an ash residue waste heat utilization device 14 and an ash residue collection device 15; the ash residue waste heat utilization device 14 is connected with the cyclone separator 11; the ash collecting device 15 is connected with the ash waste heat utilization device 14.
The biomass gasification furnace 10 is a fixed bed gasification furnace or a fluidized bed gasification furnace.
Example 5
A biomass gas and natural gas coupling power generation device comprises a combined cycle power generation device and a biomass gasification device; the combined cycle power generation device comprises a gas compressor 1, a gas turbine combustion chamber 2, a gas turbine 3, a separator 4, a waste heat boiler 5, a steam turbine 6, a condenser 7 and a water pump 8; the biomass gasification device comprises a biomass charging hopper 9, a biomass gasification furnace 10, a cyclone separator 11 and a fuel gas compressor 12;
the outlet end of the air compressor 1 is connected with a combustion chamber 2 of the gas turbine, and the air compressor 1 is used for compressing air and then conveying the air to the combustion chamber 2 of the gas turbine to serve as a combustion oxidant; the outlet end of the gas turbine combustion chamber 2 is connected with a gas turbine 3, and the gas turbine 3 is used for expanding the flue gas generated by combustion to do work and driving a generator to generate electricity; the outlet end of the gas turbine 3 is connected with a separator 4; the outlet end of the separator 4 is respectively connected with the waste heat boiler 5 and the biomass gasification furnace 10, and the separator 4 is used for respectively conveying the flue gas at the outlet of the gas turbine 3 to the waste heat boiler 5 and the biomass gasification furnace 10; the waste heat boiler 5 is used for exchanging heat between the flue gas and water to generate steam to drive the steam turbine 6 to generate power; the condenser 7 is connected with the steam turbine 6 and is used for condensing the water vapor into liquid; the water pump 8 is connected with the condenser 7 and used for pumping liquid water into the waste heat boiler 5;
the biomass gasification furnace 10 is connected with the biomass charging hopper 9, and the biomass gasification furnace 10 is used for gasifying biomass raw materials by using the flue gas input by the separator 4 and providing heat for the biomass gasification process; the cyclone separator 11 is connected with the biomass gasification furnace 10, and the cyclone separator 11 is used for separating solid ash from biomass gas and conveying the biomass gas to the gas compressor 12 for compression; gas compressor 12 is connected with gas turbine combustor 2, gas compressor 12 is arranged in carrying compressed biomass gas to gas turbine combustor 2, gas turbine combustor 2 is arranged in burning the natural gas of external input and the biomass gas of gas compressor 12 input.
The biomass gasification apparatus further comprises a dryer 13; the dryer 13 is connected between the biomass charging hopper 9 and the biomass gasification furnace 10, and the dryer 13 is used for drying the biomass raw material by using the flue gas after heat exchange in the waste heat boiler 5.
The biomass gasification device also comprises an ash residue waste heat utilization device 14 and an ash residue collection device 15; the ash residue waste heat utilization device 14 is connected with the cyclone separator 11; the ash collecting device 15 is connected with the ash waste heat utilization device 14.
The biomass gasification furnace 10 is a fixed bed gasification furnace or a fluidized bed gasification furnace.
A mixing chamber 16 is arranged between the gas compressor 12 and the gas turbine combustor 2, and the mixing chamber 16 is used for uniformly mixing the biomass gas and the natural gas and then introducing the mixture into the gas turbine combustor 2 for combustion.
Example 6
The invention relates to a biomass gas and natural gas coupled power generation device, which comprises a combined cycle power generation device and a biomass gasification device, and is shown in figure 1. The biomass gasification part comprises: the biomass raw material is crushed, the particle size meets the requirement, then the biomass raw material enters a biomass feeding hopper 9, the biomass raw material in the biomass feeding hopper 9 is dried by a dryer 13 by using low-temperature flue gas at the outlet of a waste heat boiler 5 and then enters a biomass gasification furnace 10, after the high-temperature flue gas at the outlet of the gas turbine 3 is separated by the separator 4, a part of the high-temperature flue gas is used as a gasifying agent to complete gasification reaction with biomass raw materials in the biomass gasification furnace 10, the biomass gas obtained after the gasification reaction is subjected to ash removal by the cyclone separator 11 to obtain clean biomass gas, the clean biomass gas is pressurized by the gas compressor 12 and is jointly sent into the gas power generation part of the gas turbine combustion chamber 2 with natural gas to complete combined cycle power generation, the ash removed by the cyclone separator 11 is subjected to waste heat recovery by the ash waste heat utilization device 14, the ash is then collected in an ash collection device 15 for returning to the field or industrial use, etc.
The combined cycle power generation device comprises: air is compressed to combustion pressure by an air compressor 1 and enters a combustion chamber 2 of a gas turbine, natural gas and biomass gas serving as fuel enter the combustion chamber 2 of the gas turbine together for combustion, the generated high-temperature and high-pressure gas enters a gas turbine 3 for expansion and work doing to push a generator to operate to generate electric power, high-temperature flue gas discharged by the gas turbine 3 enters a separator 4, and part of the high-temperature flue gas enters a biomass gasification furnace 10 to be used as a gasification agent to participate in biomass gasification reaction and provide energy for the gasification process; the other part of high-temperature flue gas enters a waste heat boiler 5 to heat the circulating medium, namely water, to generate high-temperature and high-pressure steam, the high-temperature and high-pressure steam enters a steam turbine 6 to expand and do work to drive a generator to operate to generate electric power, the low-pressure steam after doing work enters a condenser 7 to be cooled and condensed into water, and then returns to a water pump 8 to be compressed and boosted to complete a cycle. The low-temperature flue gas formed by cooling the high-temperature flue gas entering the waste heat boiler 5 is used for drying the biomass.
The presence of moisture in the fuel is not favorable for the conversion and utilization of biomass energy, so the drying treatment of biomass is particularly important. In the case where the moisture content of the biomass raw material may be too high, the dryer 13 used in this embodiment has both functions of drying and conveying the biomass raw material. After a biomass raw material is put into the biomass charging hopper 9, the biomass raw material is transported into the biomass gasification furnace 10 by the dryer 13 to be gasified. And conveying the low-temperature flue gas at the outlet of the waste heat boiler 5 to a dryer 13 to be used as a drying agent of the biomass raw material.
The biomass gasification refers to that the biomass is pretreated by crushing, drying and the like, and then enters a gasification furnace for gasification and cracking, namely, under certain thermodynamic conditions, the action of a gasification agent (one or more of air, oxygen, water vapor, carbon dioxide and the like) is utilized to cause the high polymer of the biomass to undergo pyrolysis, oxidation, reduction and reforming reactions so as to obtain the biomass containing CO and H2、CH4And waiting for the combustible gas. The invention can adopt either fixed bed gasification furnace or fluidized bed gasification furnace, and the operation pressure of furnace body can adopt pressurization or micro negative pressure mode.
Example 7
The invention discloses a biomass gas and natural gas coupling power generation device which comprises a combined cycle power generation part and a biomass gasification part. The method uses high-temperature flue gas at the outlet of a gas turbine 3 as a gasifying agent to gasify biomass, biomass gas and natural gas obtained after gasification are jointly used as fuel of a gas turbine combustion chamber 2 to be combusted, and then the biomass gas and the natural gas are subjected to combined cycle power generation of gas power generation and steam power generation respectively through the gas turbine 3 and a waste heat boiler 5. According to the biomass gasification combined cycle power generation system, high-temperature flue gas at the outlet of the gas turbine 3 is used as a gasification agent for biomass gasification, heat is provided for the gasification process, an external heat source is not needed to provide heat for the biomass gasification process, the energy consumption of biomass gasification is greatly reduced, the gasified biomass gas and natural gas are mixed and combusted through the mixing chamber 16 for combined cycle power generation, the efficient utilization of biomass energy is realized, and the comprehensive utilization efficiency of energy of a natural gas power plant is improved.
In conclusion, the invention provides an efficient, clean and environment-friendly energy comprehensive utilization device organically based on the combined cycle power generation device coupling biomass gas and natural gas, is friendly to the external environment, achieves the effects of high efficiency, energy conservation, water conservation and emission reduction, and accords with the current national industrial policy of developing low-carbon economy. The biomass gasification technology is adopted, and the gas generated by biomass gasification is sent into a gas turbine to be efficiently combusted, released and generated; the drying medium, the gasifying agent and the like required by biomass gasification are all provided by a natural gas power plant system, so that the biomass gasification furnace and the natural gas power plant system are organically combined together, the system operation flexibility is improved, the system investment is reduced, and the system income is increased.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (5)

1. A biomass gas and natural gas coupling power generation device is characterized by comprising a combined cycle power generation device and a biomass gasification device; the combined cycle power generation device comprises a gas compressor (1), a gas turbine combustion chamber (2), a gas turbine (3), a separator (4), a waste heat boiler (5), a steam turbine (6), a condenser (7) and a water pump (8); the biomass gasification device comprises a biomass feeding hopper (9), a biomass gasification furnace (10), a cyclone separator (11) and a fuel gas compressor (12);
the outlet end of the air compressor (1) is connected with a gas turbine combustion chamber (2), and the air compressor (1) is used for compressing air and then conveying the compressed air into the gas turbine combustion chamber (2) to serve as a combustion oxidant; the outlet end of the gas turbine combustion chamber (2) is connected with a gas turbine (3), and the gas turbine (3) is used for expanding the flue gas generated by combustion to do work and driving a generator to generate electricity; the outlet end of the gas turbine (3) is connected with a separator (4); the outlet end of the separator (4) is respectively connected with the waste heat boiler (5) and the biomass gasification furnace (10), and the separator (4) is used for respectively conveying the flue gas at the outlet of the gas turbine (3) to the waste heat boiler (5) and the biomass gasification furnace (10); the waste heat boiler (5) is used for exchanging heat between the flue gas and water to generate steam to drive the steam turbine (6) to generate electricity; the condenser (7) is connected with the steam turbine (6) and is used for condensing the water vapor into liquid; the water pump (8) is connected with the condenser (7) and is used for pumping liquid water into the waste heat boiler (5);
the biomass gasification furnace (10) is connected with the biomass feeding hopper (9), and the biomass gasification furnace (10) is used for gasifying biomass raw materials by using the flue gas input by the separator (4) and providing heat for the biomass gasification process; the cyclone separator (11) is connected with the biomass gasification furnace (10), and the cyclone separator (11) is used for separating solid ash in biomass gas and conveying the biomass gas to the gas compressor (12) for compression; gas compressor (12) are connected with gas turbine combustion chamber (2), gas compressor (12) are arranged in carrying compressed biomass gas to gas turbine combustion chamber (2), gas turbine combustion chamber (2) are arranged in burning the natural gas of external input and the biomass gas of gas compressor (12) input.
2. The biomass gas and natural gas coupled power generation device of claim 1, wherein the biomass gasification device further comprises a dryer (13); the dryer (13) is connected between the biomass charging hopper (9) and the biomass gasification furnace (10), and the dryer (13) is used for drying the biomass raw material by using the flue gas after heat exchange in the waste heat boiler (5).
3. The biomass gas and natural gas coupled power generation device according to claim 1, wherein the biomass gasification device further comprises an ash residue heat utilization device (14) and an ash residue collection device (15); the ash residue waste heat utilization device (14) is connected with the cyclone separator (11); the ash collecting device (15) is connected with the ash waste heat utilization device (14).
4. The biomass gas and natural gas coupled power generation device according to claim 1, wherein the biomass gasification furnace (10) is a fixed bed gasification furnace or a fluidized bed gasification furnace.
5. The biomass gas and natural gas coupled power generation device according to claim 1, wherein a mixing chamber (16) is included between the gas compressor (12) and the gas turbine combustor (2), and the mixing chamber (16) is used for uniformly mixing the biomass gas and the natural gas and then introducing the mixture into the gas turbine combustor (2) for combustion.
CN201811212573.5A 2018-10-18 2018-10-18 Biomass gas and natural gas coupling power generation device Pending CN111075566A (en)

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US5713195A (en) * 1994-09-19 1998-02-03 Ormat Industries Ltd. Multi-fuel, combined cycle power plant method and apparatus
US6014856A (en) * 1994-09-19 2000-01-18 Ormat Industries Ltd. Multi-fuel, combined cycle power plant
CN103409171A (en) * 2013-07-16 2013-11-27 南京师范大学 Biomass pressurized fluidized bed gasification gas turbine combined cycle power generation system
CN107129835A (en) * 2016-02-26 2017-09-05 汪春雷 A kind of method and system that gas generator is transform as to the stoves such as biomass
CN206739278U (en) * 2017-05-10 2017-12-12 上海垒锦环境科技中心 A kind of biomass comprehensive energy utilization system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5713195A (en) * 1994-09-19 1998-02-03 Ormat Industries Ltd. Multi-fuel, combined cycle power plant method and apparatus
US6014856A (en) * 1994-09-19 2000-01-18 Ormat Industries Ltd. Multi-fuel, combined cycle power plant
CN103409171A (en) * 2013-07-16 2013-11-27 南京师范大学 Biomass pressurized fluidized bed gasification gas turbine combined cycle power generation system
CN107129835A (en) * 2016-02-26 2017-09-05 汪春雷 A kind of method and system that gas generator is transform as to the stoves such as biomass
CN206739278U (en) * 2017-05-10 2017-12-12 上海垒锦环境科技中心 A kind of biomass comprehensive energy utilization system

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