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A kind of updraft steam gasification device for biomass and tar mixture

A gasification device and steam technology, applied in the direction of gasification device feeding tool, gasification process, fixed bed gasification, etc., can solve the problem of reducing the temperature of gasification gas, reducing the content of heavy tar, and the deterioration of gasification effect, etc. problem, to achieve the effect of reducing heavy tar content, reducing sensible heat loss, and reducing content

Active Publication Date: 2022-02-25
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of updraft steam gasification device and method for the mixture of biomass and tar, which utilizes the characteristics of low temperature and long residence time in the upper part of the updraft fixed bed biomass gasifier to emulsify The final tar is fully mixed with the biomass material in the upper part of the up-suction fixed-bed biomass gasifier, and the mixture of biomass material and tar is used to reduce the temperature of the gasification gas and reduce the content of heavy tar in the gas; at the same time, the up-suction The height of the middle part of the fixed-bed biomass gasifier is used to dry the biomass and tar mixture slowly and evenly, and the moisture of the biomass-tar mixture is dried to below 10%, ensuring the lower part of the up-suction fixed-bed biomass gasifier The working conditions of pyrolysis layer, reduction layer, and oxidation layer are not affected by tar moisture, so as to realize the mixed gasification of biomass material and tar in the gasifier, and solve the problem of sending tar with high water content back to high temperature in the prior art The oxidation zone causes changes in the working conditions of the oxidation layer of the gasification equipment (such as lowering the temperature, increasing the air ratio, etc.), resulting in the deterioration of the gasification effect

Method used

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  • A kind of updraft steam gasification device for biomass and tar mixture
  • A kind of updraft steam gasification device for biomass and tar mixture
  • A kind of updraft steam gasification device for biomass and tar mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1A above-mentioned aqueous steam vapor gasification apparatus for biomass and tar mixture, a biomass treatment amount 1.5T / h, the apparatus includes an upper suction gasifier, the main body is a cylindrical refractory masonry 13 and steel furnace shells, lower part of the furnace shell is provided with a rotary furnace row, and the rotary furnace is rowned and distributed and distributed; the upper suction gasification furnace is divided into oxide layers from bottom to top. 1, the reduction layer 2, the pyrolysis layer 3, the drying layer 4 and the mixing zone 5; the upper portion of the upper absolute gasifier is provided with a gas outlet 11 and the feed port 6, and there is 1-3 emulsified priests. The water spray port 7 is provided with an air interface 8 at the bottom of the oxide layer; the gas outlet 11 is connected to an indirect cooler, separating the tar with gas and obtains a lightweight tar water containing a lightweight tar water and a lower la...

Embodiment 2

[0032] Device Reference Example 1, operating load 1T / h, air input is 1000 nm 3 / H, the top-containing heterogeneous aqueous solution is 200 kg / h, the concentration of the heavy tar aqueous solution concentration is 50 wt.%, the bottom saturated water vapor input is about 50 ~ 80 kg / h, which contains lightweight tar water atomization interface. 10 Open, the bottom containing a lightweight tar atomized water input 20 kg / h, where the tar concentration is 15 wt.%. Under this condition, the refocusted oil water and the biomass raw material are mixed in the upper mixing zone of the upper suction gasifier, and the moisture is removed while the moisture is removed while the moisture is removed. Releasing; the raw material removed by moisture is further thermally resolved into volatile division and solid coke, and the volatile division is taken above; the solid coke sequentially enters the lower reduction layer and the oxide layer; simultaneous air from the upper suction gas At th...

Embodiment 3

[0034] Apparatus refers to Example 1, and there is a difference in that the biomass treatment amount is 2T / h, and four emulsified tar water spray inlet 7 are mounted on the top of the apparatus. The oxide layer 1 and the reduction layer 2 are in the circumferential direction of 4 A common nozzle interface 12.

[0035] Operation load 2T / h, the top having a heavy water solution in the top is 300 to 500 kg / h, and the air passage through the air interface 8 is 2000 nm. 3 / h, the bottom is 650 kg / h by the saturated water vapor input of the pressurized water vapor interface 9, the saturated water vapor parameters are 0.25 ~ 0.4 MPa, 127 to 143 ° C, and the bottom passes through a lightweight tar atomized water interface 10. Lightweight tar atomized water input 100 kg / h, wherein the tar content is 50 to 100 g / L. Under this operating conditions, the heavy tar-containing water solution and the biomass raw material are 1.0 to 1.5 h in the upper mixing zone of the upper suction ...

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Abstract

The invention discloses an up-suction steam gasification device and method for a mixture of biomass and tar. The emulsified tar is fully mixed with biomass materials at the upper part of an up-suction fixed-bed biomass gasification furnace. The mixture of biomass materials and tar reduces the temperature of gasification gas and reduces the content of heavy tar in the gas; at the same time, the biomass and tar mixture is dried slowly and evenly by using the middle height of the up-suction fixed-bed biomass gasifier. Dry the moisture of the mixture of biomass and tar to less than 10%, so as to ensure that the working conditions of the pyrolysis reduction zone and oxidation combustion zone in the lower part of the updraft fixed-bed biomass gasifier are not affected by the moisture of tar, so as to realize the biomass material The mixed gasification of tar and tar in the gasifier solves the problem of changing the working conditions of the oxidation combustion zone of the gasification equipment caused by sending tar with high water content back to the high-temperature oxidation zone in the prior art (such as temperature drop, increase of air ratio, etc.), The problem of poor gasification effect.

Description

Technical field: [0001] The present invention relates to the field of biomass energy, and more particularly to an upper suction water vapor gasification device for biomass and tar mixture. Background technique: [0002] Common biomass gasification devices include fluidized beds, sub-fixing beds, upper suction fixed beds, upper and lower compact flow fixed beds, etc. The fixed bed is less likely to zoom in compared to the fluidized bed gasifier, the gasification is low, but there is also a significant advantage, such as simple structure, low cost, easy to operate, can be used for block material, low fly ash content, so therefore Small and medium-sized biomass gas production is still better. [0003] The fixed bed gasification furnace contains two basic furnace types, mainly different from the airflow and fuel operation direction, and the airflow of the upper absolute gasifier is flowing from bottom to bottom. The airflow in the medium flows from the top, and the fuel is relied fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/02C10J3/20C10J3/24C10J3/72C10G9/00
CPCC10G9/00C10J3/02C10J3/20C10J3/24C10J3/72C10J3/725C10J2300/0976C10J2300/0903C10J2300/0916C10G2300/807C10J2200/15
Inventor 吴创之阴秀丽袁洪友潘贤齐黄艳琴刘华财
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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