CN117511606A - Method for realizing biomass energy efficient coupling poly-generation conversion by utilizing zero emission of circulating fluidized bed gasification - Google Patents

Method for realizing biomass energy efficient coupling poly-generation conversion by utilizing zero emission of circulating fluidized bed gasification Download PDF

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Publication number
CN117511606A
CN117511606A CN202311737447.2A CN202311737447A CN117511606A CN 117511606 A CN117511606 A CN 117511606A CN 202311737447 A CN202311737447 A CN 202311737447A CN 117511606 A CN117511606 A CN 117511606A
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China
Prior art keywords
oxygen
fluidized bed
fluidizer
hydrogen
carbon dioxide
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CN202311737447.2A
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Chinese (zh)
Inventor
董惠文
董洪涛
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Jiankong New Energy Lianyungang Co ltd
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Jiankong New Energy Lianyungang Co ltd
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Priority to CN202311737447.2A priority Critical patent/CN117511606A/en
Publication of CN117511606A publication Critical patent/CN117511606A/en
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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
    • C10J3/02—Fixed-bed gasification of lump fuel
    • 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
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—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
    • C10J3/723—Controlling or regulating the gasification process
    • 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
    • C10J3/74—Construction of shells or jackets
    • C10J3/76—Water jackets; Steam boiler-jackets
    • 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
    • C10J3/80—Other features with arrangements for preheating the blast or the water vapour
    • 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
    • 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
    • C10J3/86—Other features combined with waste-heat boilers
    • 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
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/0916—Biomass
    • 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
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0973—Water
    • C10J2300/0976—Water as steam
    • 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
    • C10J2300/1215—Heating the gasifier using synthesis gas as fuel
    • 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
    • C10J2300/164—Integration of gasification processes with another plant or parts within the plant with conversion of synthesis gas
    • C10J2300/1643—Conversion of synthesis gas to energy
    • 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
    • C10J2300/1675—Integration of gasification processes with another plant or parts within the plant with the production of electricity making use of a steam turbine
    • 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
    • C10J2300/1684—Integration of gasification processes with another plant or parts within the plant with electrolysis of water
    • 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
    • C10J2300/1687—Integration of gasification processes with another plant or parts within the plant with steam generation
    • 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
    • C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
    • C10J2300/1853—Steam reforming, i.e. injection of steam only

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The method comprises the steps of utilizing a circulating fluidized bed gasifier, taking pure oxygen and water vapor as fluidizer, taking carbon dioxide on-line detection as control, and blending the proportion of the oxygen and the water vapor in real time; gasifying to generate high-energy biomass synthesis gas; the high-pressure steam realizes low-cost power generation by a high-temperature high-pressure back pressure steam turbine; the low cost electrolysis of water is used to generate hydrogen and oxygen, the oxygen is used as the fluidizer for the project, and the hydrogen is stored as a product. The whole project realizes the efficient coupling poly-generation conversion of biomass energy in a closed-circuit zero-emission mode.

Description

Method for realizing biomass energy efficient coupling poly-generation conversion by utilizing zero emission of circulating fluidized bed gasification
Technical Field
Belongs to the technical field of biomass energy application, and in particular relates to a biomass fluidized bed gasification method which uses pure oxygen and steam as fluidizer to generate synthesis gas, high-temperature high-pressure back pressure power generation, electrolyzed water to generate hydrogen and oxygen, wherein the oxygen is used as fluidizer, and hydrogen is stored as a product. Zero emission is realized in the whole process.
Background
At present, environmental protection requirements are met, and emission indexes are required to be obtained in all projects, which is a great precondition, in the projects using steam, synthesis gas, hydrogen and electricity, one or more products are produced mainly through conditional coupling, the rest is auxiliary, the zero emission is realized in the whole process, the theoretical value of conversion efficiency is 100%, and the cost is greatly saved.
The back pressure power generation cost per degree in the project is lower than 0.18 yuan, the project has the condition (economic value) of electrolysis water completely, the main aim of the project is to provide steam, hydrogen and synthesis gas are used as byproducts, the integral income of the project is increased, and the electric power can provide low-cost power supply for the whole project besides electrolysis water.
The current demand of various parks for steam is different, such as uneven daytime and evening, different seasonal demand, and the large fluidized bed furnace can not realize frequent switching or large machine small use, so the invention can effectively solve the problem; the dynamic adjustment of the output is particularly suitable for parks with unstable gas and electricity consumption, and is used for supplying steam at full power during steam peak; when the electricity price is high in the daytime, the electrolysis is stopped, and besides the steam is supplied, the low-heating-value mixed gas is supplied to a separate gas boiler, and the generated high-temperature high-pressure steam is simultaneously supplied to a back pressure type gas turbine generator set so as to generate more electric energy; during the equilibrium period, when the amount of steam used is reduced, full mode production is started, with the production of high purity synthesis gas and hydrogen being dominant.
Disclosure of Invention
The invention can solve the problem of any application of converting biomass energy into any one of steam, synthesis gas, hydrogen and electricity under the condition of zero emission.
A biomass fluidized bed gasification apparatus, the apparatus and use comprising: feeding biomass to an air sowing plate in a spiral manner, carrying out electric heating ignition on the air sowing plate, blowing and sowing oxygen into a furnace, uniformly scattering the material, using oxygen and water vapor as fluidizer, generating incomplete oxidation reaction of the biomass to generate carbon monoxide and carbon dioxide under the condition of keeping the temperature of a hearth to about 850 ℃, reducing the carbon dioxide to carbon monoxide under the action of the water vapor and high temperature, and simultaneously generating a large amount of methane and hydrogen through complex thermophysical reaction, wherein the whole process product is biomass synthesis gas taking the carbon monoxide, the methane and the hydrogen as main components; the synthesis gas is either directly stored (FIGS. 1-12) for sale or purified for sale after storage. In the process, a gas online detector (shown in figures 1-5) is positioned at the outlet of the sallong and mainly detects carbon dioxide and sulfides, and when the existence of the carbon dioxide in the synthesis gas is detected, the carbon dioxide in the synthesis gas is eliminated by one or more means under the condition of keeping the furnace temperature, such as adding steam in a mixed fluidizer, so as to reduce oxygen; and then automatically starting the top water vapor spraying equipment (shown in figures 1-23) to reduce the carbon dioxide into carbon monoxide; when sulfide exists in the synthesis gas, limestone feeding is automatically started to neutralize the sulfide.
The fluidized bed water cooling wall, the superheater, the bubble and the economizer form a fluidized bed steam boiler module together, high-temperature (suggested 450 ℃) high-pressure (suggested 9.8 Mpa) steam is generated, and part of the steam generated by the back pressure steam turbine generator unit is used as a fluidizing agent, and the rest of the steam is used for other industrial purposes.
The power generation cost of the back pressure steam turbine generator unit is lower than 0.18 yuan/degree, electric power is supplied to the water electrolysis equipment to generate hydrogen and oxygen, the hydrogen is directly stored and sold, and the oxygen and the water vapor are used as fluidizer together. The redundant power can be used by itself or on the internet.
The generated oxygen enters a storage tank, a high-pressure fan extracts oxygen from the storage tank (shown in figures 1-13), the oxygen passes through a preheater (shown in figures 1-8) to form high-temperature oxygen, the high-temperature oxygen and the generated steam enter a fluidizer storage distribution box (shown in figures 1-15) together, the fluidizer is uniformly blown into the furnace through a wind distribution plate, and the fluidizer is blown into a secondary fluidization oxygenation position (shown in figures 1-19) according to the requirement; the blowing in the sowing (fig. 1-1) can be pure oxygen or mixed fluidizer.
Description of the drawings:
FIG. 1A plan view structure and flow chart
1-feeding; 2-raw limestone is automatically fed; 3-water cooling walls; 4-bubbling; 5-an online gas detector; 6-superheater; 7-an economizer; 8-an oxygen preheater; 9-synthesizer purification; 10-back pressure type gas turbine generator sets; 11-an electrolysis water apparatus; 12-a high-pressure fan; 13-an oxygen storage device; 14-a hydrogen storage device; 15-a mixed fluidizer storage and distribution tank; 16-fluidizer air distribution plate (box); 17-removing slag; 18-a steam pipeline after power generation and work application; 19-a secondary fluidization or oxygenation port; 20-a preheated oxygen pipeline; 21-a fluidizer conduit; 22-a source of broadcast; 23-a water vapor spraying device.
The method is carried out with the aim of supplying pure steam:
the generator set and the water electrolysis set are not used, air and water vapor are used as fluidizer, and the vapor generated by the generator set is directly supplied to the outside except the fluidizer; meanwhile, the gas boiler is matched, and the low-heat value mixed gas (with a heat value of 1200 kilocalories) generated by the unit is directly supplied to the gas boiler to generate steam for external supply. The Jiangsu province has issued a literature, and clearly indicates that biomass cannot be directly combusted, the unit has zero emission to be molded, and the unit is used for generating mixed gas, so that non-molded biomass can be directly used.
The method for implementing coupling co-production mainly comprises the following steps of:
starting all the equipment, and then configuring a gas boiler, wherein steam generated by the unit is directly supplied to the outside except when the steam is used as a fluidizing agent; the high-heat value mixed gas (heat value 8000 kilocalories) generated by the unit is directly supplied to the gas boiler to generate steam for external supply. Hydrogen is used as high-energy fuel, stored and sold correspondingly, so that the income of the project can be increased; the redundant power can be used for supplying the project and can also be sold.
The implementation method of the poly-generation comprehensive supply comprises the following steps:
according to the requirement, the yield is dynamically adjusted, and the method is particularly suitable for parks with unstable gas and electricity consumption, and is used for supplying steam at full power during steam peak; when the electricity price is high in the daytime, the electrolysis is stopped, and besides the steam is supplied, the low-heating-value mixed gas is supplied to a separate gas boiler, and the generated high-temperature high-pressure steam is simultaneously supplied to a back pressure type gas turbine generator set so as to generate more electric energy; during the equilibrium period, when the amount of steam used is reduced, full mode production is started, with the production of high purity synthesis gas and hydrogen being dominant.

Claims (5)

1. The method is characterized in that the linkage unit consisting of a circulating fluidized bed gasifier, a back pressure steam turbine generator unit, electrolytic water hydrogen and oxygen production equipment and a gas boiler is mainly used, the environment-friendly zero emission is used as a technical key point, the capacity of each product can be dynamically adjusted according to the actual production demand condition, the equipment can be guaranteed to run at full load under any condition, the primary nutrient and the secondary nutrient are combined, and the profit maximization is guaranteed.
2. The circulating fluidized bed gasification furnace according to claim 1, wherein oxygen and water vapor are used as fluidizer, the mixture is uniformly output through an air distribution plate and an air cap at the bottom, and whether carbon dioxide and sulfide are contained in the mixture is measured by an online gas analyzer, if carbon dioxide exists, the upper water vapor spraying device is automatically started according to the detected carbon dioxide value on the premise of keeping the furnace temperature at about 850 ℃, and the oxygen in the mixed fluidizer is reduced, so that no carbon dioxide exists in the mixture, and the energy efficiency is improved; if sulfide exists, quick lime feeding is started to achieve the neutralization effect.
3. The back pressure turbo generator set of claim 1, wherein the back pressure turbo generator set is an important part of the whole system, the high pressure is about 9.8MPA, the high temperature is about 450 ℃, and the back pressure turbo generator set has the function of producing low-cost electric power (less than 0.18 yuan) in the system, ensuring low-cost electricity consumption of electrolyzed water and reaching the efficiency balance point or below.
4. The apparatus for producing hydrogen and oxygen from electrolyzed water according to claim 1, wherein the apparatus is an important part of the whole system, and is characterized in that a sufficient amount of oxygen is generated for the fluidizing agent, and the subsidiary product hydrogen is stored for sale.
5. The gas-fired boiler according to claim 1, wherein the heating surface of the boiler is 15% -30% larger than that of a standard boiler, and the heating value of the combustible gas is 1000 kilocalories or more.
CN202311737447.2A 2023-12-18 2023-12-18 Method for realizing biomass energy efficient coupling poly-generation conversion by utilizing zero emission of circulating fluidized bed gasification Pending CN117511606A (en)

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