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A biomass low-temperature carbon-gas cogeneration device, a biomass low-temperature carbon-gas cogeneration device, and a biomass low-temperature carbon-gas cogeneration method

A technology of biomass charcoal and biomass, which is applied in the direction of biofuel, manufacture of combustible gas, granular/powdered fuel gasification, etc. It can solve the problems of long residence time, burning loss of biochar, short residence time of biochar, etc.

Active Publication Date: 2021-07-06
HUNAN MORDEN ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional fixed-bed charcoal-gas cogeneration furnaces have high requirements for raw materials, and the gas produced carries a certain amount of liquid tar, which affects the utilization of gas, and at the same time, the burning loss of biochar is serious; conventional bubbling fluidized bed charcoal The gas cogeneration furnace has low requirements on the types of raw materials, and the tar in the generated gas is in a gaseous state. The influence of the tar on the subsequent system can be eliminated by direct combustion of hot gas, but the residence time of biochar in the high temperature area of ​​the furnace is short, resulting in The quality of the biochar is poor, or the residence time is too long, the biochar is burned seriously, or the height of the fluidized bed furnace is too high, and the equipment investment is too large

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: as figure 1 The schematic diagram of a biomass low-temperature carbon-gas cogeneration device is shown in the schematic diagram. The device includes a feeding device 1, a fluidized bed charcoal-gas cogeneration furnace body 2, a biomass charcoal reheating device 3, a gas-solid separation device 4, an adiabatic Combustion device 5, waste heat boiler 6, induced draft fan 7, blower fan 8, gas nozzle 9, biomass charcoal cooling and collection device 10, flue gas fan 11, expansion zone 12, standpipe 13, temperature and speed regulation nozzle 14.

[0038] The fluidized bed charcoal gas cogeneration furnace body 2 (bubbling fluidized bed is adopted in this embodiment) is connected with the feeding device 1, and the bottom is connected with a biomass charcoal cooling and collecting device 10 and a blower 8, and the fluidized bed charcoal gas The middle and upper part of the co-production furnace body 2 are provided with a temperature-regulating and speed-regulati...

Embodiment 2

[0040] Biomass charcoal and steam are produced by using a biomass low-temperature charcoal-steam cogeneration device of the present invention. The selected raw material is corn stalks with a length of about 2-4cm and a water content of <18%. The selected bed material is ceramic balls with a particle size of 0.2-0.7mm.

[0041] Put the above-mentioned raw materials and bed materials into the bubbling fluidized bed charcoal-gas cogeneration furnace through the feeding device, blow air into the furnace through the blower, adjust the steam flow from the waste heat boiler, and control the gas flow rate in the furnace to 2.5m / s, The reaction temperature in the furnace was controlled at 500°C.

[0042] The raw material undergoes pyrolysis and gasification reaction in the furnace, and the generated biomass gas carries the biomass charcoal into the biochar reheating device for gas-solid separation, and the straw char is heated again in the biochar reheating device for about 3 minutes t...

Embodiment 3

[0044] Biomass charcoal and steam are produced by adopting a kind of biomass low-temperature carbon-steam cogeneration device of the present invention, the selected raw material is bamboo chips, the length is about 0-5cm, the moisture is <25%, the selected bed material is ceramic balls, the particle size 0.2-1mm.

[0045] Put the above-mentioned raw materials and bed materials into the bubbling fluidized bed charcoal-gas cogeneration furnace through the feeding device, blow air into the furnace through the blower, adjust the flue gas flow rate from the waste heat boiler, and control the gas flow rate in the furnace to 3m / s. Control the reaction temperature in the furnace to 550°C.

[0046] The raw material undergoes pyrolysis gasification reaction in the furnace, and the generated biomass gas carries the biomass charcoal into the biochar reheating device for gas-solid separation. The bamboo charcoal is reheated in the reheating device for about 4 minutes to improve the quality...

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Abstract

The invention belongs to the technical field of renewable energy, and in particular relates to a biomass low-temperature charcoal-gas cogeneration device, a biomass low-temperature charcoal-gas cogeneration device and a charcoal-gas cogeneration method. The biomass low-temperature carbon-gas cogeneration device includes a feeding device, a fluidized bed charcoal-gas cogeneration furnace body, a biomass charcoal reheating device, a gas-solid separation device, a blower, and a biomass charcoal cooling and collecting device. The biomass low-temperature carbon-gas cogeneration device includes all the devices of the biomass low-temperature carbon-gas cogeneration device and also includes a waste heat boiler and a flue gas fan. The invention has the advantages of high-quality produced biomass charcoal, low pyrolysis temperature of biomass raw materials, and the like.

Description

technical field [0001] The invention belongs to the technical field of renewable energy, and in particular relates to a biomass low-temperature carbon-gas cogeneration device, a biomass low-temperature carbon-gas cogeneration device and a biomass low-temperature carbon-gas cogeneration method. Background technique [0002] At present, straw raw materials are mostly processed by direct combustion power generation and pyrolysis. However, the calorific value of straw raw materials is low, the moisture content is high, and the cost of large-scale raw material storage and transportation is high. Direct combustion power generation projects are subject to raw material collection costs. The small scale leads to low efficiency of direct combustion power generation projects, and the alkali metal contained in the straw will corrode the boiler with the flue gas, and it will also cause poisoning of the SCR catalyst in the flue gas treatment system, thus reducing the air pollutants in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/02C10B57/00C10B57/14C10J3/56C10J3/72C10J3/84C10J3/86
CPCC10B53/02C10B57/00C10B57/14C10J3/56C10J3/723C10J3/84C10J3/86Y02E50/10Y02P20/129Y02P20/133
Inventor 李慧程东海姚启良颜文平卢海威黄磊
Owner HUNAN MORDEN ENVIRONMENT TECH
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