Biomass utilization device and method based on coal-fired boiler high-temperature flue gas

A technology for high-temperature flue gas and coal-fired boilers, which is applied in the direction of combustion methods, biofuels, and the use of multiple fuels, which can solve the problems of large total investment, high initial investment and operating costs, and high operating risks, and achieve cost reduction and risks, high energy efficiency, and the effect of improving working conditions

Inactive Publication Date: 2018-11-23
XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The key to biomass gasification technology is the biomass gasification furnace system. The total investment of this system is large, the system is complex, and the operation risk is high. At the same time, due to the limitation of combustible gas delivery temperature, certain energy loss will inevitably occur.
[0004] In view of the fact that the initial investment and operating costs of using biomass energy in the gasification furnace system are relatively high and the energy utilization is insufficient, it is necessary to develop a new biomass energy utilization technology to reduce the investment threshold of biomass energy utilization systems and equipment. Improve the utilization rate of biomass energy and enhance the market competitiveness of biomass power generation technology

Method used

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  • Biomass utilization device and method based on coal-fired boiler high-temperature flue gas

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Effect test

Embodiment 1

[0034] S1: The high-temperature flue gas extracted from the coal-fired boiler system 100 is mixed and the temperature reaches 500-800°C, and is sent to the lower part of the biomass carbonization system 200 through the high-temperature flue gas inlet;

[0035] S2: sending the biomass material into the biomass dry distillation system 200 from the biomass inlet at the top of the biomass dry distillation reactor 6;

[0036] S3: In the high-temperature and low-oxygen environment of the biomass carbonization system 200, the biomass material is heated and dry-distilled by high-temperature flue gas to remove moisture, precipitate gas-phase substances and form a gas-phase mixture, and obtain carbonized carbon;

[0037] S4: The gas phase mixture precipitated in S3, including the flue gas after carbonization, the moisture and tar precipitated after biomass carbonization, and the temperature is higher than the boiling point of tar (380°C) and lower than the allowable temperature for the o...

Embodiment 2

[0040] The present invention as figure 1 As shown, it includes a coal-fired boiler system 100 composed of a boiler fuel preparation device 7 and a furnace 1, a biomass carbonization system 200 composed of a biomass pretreatment feeding device 5 and a biomass carbonization reactor 6, and a furnace smoke fan 4 ; The coal-fired boiler system 100 is connected to the biomass carbonization system 200, and a furnace smoke blower 4 is arranged on the pipeline for transporting the gas phase mixture between them;

[0041] The boiler fuel preparation device 7 adopts a coal feeder and a coal mill. According to the difference in the form of the furnace 1, a belt-type or chain-type pulverizing system can be used; the furnace 1 is provided with high-temperature flue gas at different positions. At the extraction point, a pulverized coal burner 2 is also provided on the side wall connected to the boiler fuel preparation device 7, and a carbonization gas burner 3 is also provided on the side wa...

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Abstract

The invention provides a biomass utilization device and method based on coal-fired boiler high-temperature flue gas. The biomass utilization device and method based on coal-fired boiler high-temperature flue gas comprises a coal-fired boiler system and a biomass dry distillation system; the coal-fired boiler system comprises a hearth and a boiler fuel preparing device arranged on a feeding openingof the hearth, the biomass dry distillation system comprises a biomass dry distillation reactor, a biomass inlet is formed in the top of the biomass dry distillation reactor, a dry distillation carbon outlet is formed in the bottom of the biomass dry distillation reactor, a high-temperature flue gas outlet is formed in the lower portion of the side wall of the biomass dry distillation reactor, and a gas phase mixture outlet is formed in the upper portion of the side wall; multiple high-temperature flue gas extraction points are arranged on the hearth, through pipeline mixing, the extraction points are connected with the high-temperature flue gas inlet, the dry distillation carbon outlet is connected with the input end of the boiler fuel preparing device, and the gas phase mixture outlet is connected to the hearth combustion area through a pipeline. The system composition is simple, no combustible gas explosive risks exist, the biomass energy utilization efficiency is high, the biomassenergy large-scale development cost and risks are sufficiently reduced, and the product added value is effectively improved.

Description

technical field [0001] The invention relates to the field of biomass clean utilization, in particular to a biomass utilization device and method based on high-temperature flue gas of a coal-fired boiler. Background technique [0002] Biomass is the fourth largest energy source after coal, oil, and natural gas. It has the advantages of cleanness, regeneration, wide distribution, and "near-zero emission" of carbon dioxide. At the same time, it also has problems such as low energy density and high transportation costs. [0003] At present, the technology of utilizing biomass energy mainly adopts biomass gasification technology. Biomass gasification is under certain thermodynamic conditions, with the help of the air part (or oxygen) and water vapor, the biomass high polymer undergoes pyrolysis, oxidation, reduction and reforming reactions, and finally converted into carbon monoxide, hydrogen and low molecular weight hydrocarbons and other combustible gases. The key to biomass ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C1/00F23K1/00C10B53/02C10B57/16C10B49/02
CPCC10B49/02C10B53/02C10B57/16F23C1/00F23K1/00Y02E50/10
Inventor 周虹光严响林房凡陈煜汪华剑白鹏吴庆龙
Owner XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD
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