A power generation device coupled with biomass gasification and oxyfuel combustion combined cycle

Oxygen-enriched combustion and combined cycle technology, applied in biofuels, gas turbine installations, gasification processes, etc., can solve problems such as low power generation efficiency, low biomass gasification efficiency, and difficulty in CO2 separation in power generation systems.

Active Publication Date: 2021-05-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the low power generation efficiency caused by the low biomass gasification efficiency in the prior art, and the CO in the power generation system 2 Difficulty in separation, and technical problems of environmental pollution caused by pollutants produced in the process of biomass gasification

Method used

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  • A power generation device coupled with biomass gasification and oxyfuel combustion combined cycle
  • A power generation device coupled with biomass gasification and oxyfuel combustion combined cycle
  • A power generation device coupled with biomass gasification and oxyfuel combustion combined cycle

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Embodiment 1

[0042] A power generation device coupled with biomass gasification and oxyfuel combustion combined cycle, the structure diagram of the device is shown in figure 1 As shown, the specific working process is as follows:

[0043] (1) Biomass gasification

[0044] The biomass raw material is added to the gasifier 1, from CO 2 Part of CO separated by splitter A 12 2 , part of the water separated by the water separator 11 and O 2 O in tank 24 2 As a gasification agent, from CO 2 Part of CO separated by splitter A 12 2 and O 2 O in tank 24 2 After mixing, part of the water separated by the water separator 11 is preheated by the preheater 25 and enters the gasification furnace 1 to gasify the biomass raw material. The gasification pressure is 1 atmospheric pressure and the gasification temperature is 600~ 1000°C. The crude synthesis gas produced by gasification enters the cyclone separator 2 to remove unreacted solid impurities, and then enters the water scrubber 3 to wash off...

Embodiment 2

[0052] A power generation device coupled with biomass gasification and oxyfuel combustion combined cycle, its structure schematic diagram is as follows figure 2 shown. This embodiment is different from Embodiment 1 in that the water discharged from the bottom of the gas-water separator 10 is separated into two parts by the water separator 11, one part is directly discharged, and the other part is used as a gasification agent, which is preheated by the preheater 25. After heating, it enters the gasifier 1 to participate in gasification. Therefore, in this embodiment, at the combustion temperature of oxyfuel combustion, the neutralizing medium is only the CO separated from the flue gas 2 .

Embodiment 3

[0054] A power generation device coupled with biomass gasification and oxyfuel combustion combined cycle, its structure schematic diagram is as follows image 3 shown. This embodiment is different from embodiment 1 in that, with CO 2 After the main flue gas is compressed to 0.6MPa by the flue gas compressor 15, it directly enters the CO 2 In the condenser 16, the CO in the flue gas 2 is condensed into a liquid state, discharged from the bottom of the gas-liquid separator 17 and stored in CO 2 In the storage tank 20 , other non-condensable gases are discharged from the top of the gas-liquid separator 17 . Therefore, in this embodiment, the neutralizing medium at the combustion temperature of oxy-fuel combustion is only circulating water.

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Abstract

The invention discloses a power generation device coupled with biomass gasification and oxygen-enriched combustion combined cycle, which belongs to the field of biomass gasification power generation. Including gasifier, cyclone separator, water scrubber, heat exchanger, syngas compressor, oxygen compressor, burner, gas turbine, waste heat boiler, gas-water separator, water separator, flue gas compressor, CO 2 Condenser, gas-liquid separator, CO 2 Splitter B, CO 2 pump, CO 2 storage tank, supercritical CO 2 Pumps, sewage extraction tanks and extract separators. The present invention uses CO separated from combustion flue gas 2 And / or water is used as the gasification agent to carry out gasification reaction, and the gasification efficiency and power generation efficiency are high. The invention is easy to realize the separation of combustion flue gas components and carbon capture, and has the advantage of negative carbon emissions. After capture, part of the liquid CO 2 Used to produce supercritical CO 2 , by extracting the tar-containing sewage produced in the synthesis gas purification process, and realizing the sewage purification at a lower cost.

Description

technical field [0001] The invention belongs to the field of biomass gasification power generation, and more specifically relates to a power generation device coupled with a combined cycle of biomass gasification and oxygen-enriched combustion. Background technique [0002] The depletion of fossil energy and environmental pollution have become two major problems in contemporary development. Human beings urgently need to find green and clean energy to promote the sustainable development of society. Biomass has the advantages of renewable, abundant raw materials, clean and low-carbon. Biomass gasification power generation technology can replace traditional energy and avoid environmental problems in the process of energy utilization. However, the gasification agent used in the traditional biomass gasification power generation technology generally contains air, and a large amount of N brought in by the air 2 so that the synthesis gas contains a lot of N 2 and nitrogen oxides, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C6/00F02C6/18F01K11/02F01K23/10C10J3/00C10J3/72C10J3/84C02F1/26
CPCC02F1/26C10J3/00C10J3/72C10J3/84C10J2300/0959C10J2300/0969C10J2300/0973C10J2300/1603C10J2300/1606C10J2300/1615C10J2300/1671C10J2300/1675C10J2300/169F01K11/02F01K23/10F02C6/00F02C6/18Y02E20/18Y02E50/10Y02P20/129Y02P20/54
Inventor 蔡磊向艳蕾管延文刘文斌
Owner HUAZHONG UNIV OF SCI & TECH
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