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Device for producing synthesis gas through biomass gasification and method of device

A gasification device and biomass technology, applied in gasification process, chemical modification of combustible gas, purification/transformation of combustible gas, etc., can solve problems such as high tar content, low calorific value of synthesis gas, and difficult conversion and removal. To achieve the effect of increasing added value, avoiding carbon deposition and improving service life

Active Publication Date: 2016-08-31
SOUTHEAST UNIV
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Problems solved by technology

[0005] Technical problem: According to the limitations of the existing technology, the purpose of the present invention is to provide a device and method for producing synthesis gas from biomass gasification by stages, so as to solve the problem of low calorific value and tar content of the existing biomass gasification synthesis gas. High, conversion and removal are difficult, and a method is proposed to produce tar-free, high-concentration H 2 Biomass gasification device and method for CO and CO synthesis gas, and can be co-produced to obtain potassium-rich fertilizer by-products

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  • Device for producing synthesis gas through biomass gasification and method of device

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example 1

[0049] Example 1: Wheat Straw Biomass

[0050] Agricultural waste straw is used as raw material, and the gasification process is as above: the wheat straw is broken to about 0.3-0.6mm, and 100gK 2 CO 3 Prepare 2000mL of solution, soak 1000g of crushed wheat straw at room temperature for 1 hour, and then send it to a dryer to dry to a water content below 10%. 700°C, the reforming reaction temperature is 750°C, the combustion reaction temperature is 900°C, the mass ratio of water vapor / wheat straw into the gasification reactor is 0.5, and the circulating bed material is Al 2 o 3 and CaCO 3 / CaO, the ratio of the two is 1:5, CaCO 3 / CaO circulation amount and biomass mass ratio 4:1, reforming catalyst is 15%Ni-3%Li / Al 2 o 3 ; The synthesis gas obtained by gasification reforming, the gas component H after cooling and purification 2 : 65.9%, CO: 19.5%, CO 2 : 14.1%, CH 4 3 / kg, tar 3 , ash K 2 O content -50%.

example 2

[0051] Example 2: Wheat Straw Biomass

[0052] Agricultural waste straw is used as raw material, and the gasification process is as above: the wheat straw is broken to about 0.3-0.6mm, and 150gK 2 CO 3 Prepare 3000mL of solution, impregnate 1000g of crushed wheat straw at room temperature for 1 hour, and then send it to a dryer to dry to a water content below 10%; send the pretreated straw to a pyrolysis reactor with a reaction temperature of 700°C and a gasification temperature of 750°C , the reforming reaction temperature is 750°C, the combustion reaction temperature is 900°C, the mass ratio of water vapor / wheat straw into the gasification reactor is 0.4, and the circulating bed material is Al 2 o 3 and CaCO 3 / CaO, the ratio of the two is 2:1, CaCO 3 / CaO circulation amount and biomass mass ratio 2:1, reforming catalyst is 15%Ni-10%Mg / Al 2 o 3 ; The synthesis gas obtained by gasification reforming, the gas component H after cooling and purification 2 : 60.2%, CO: 24....

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Abstract

The invention discloses a device for producing synthesis gas through biomass gasification and a method of the device. The device mainly comprises a pyrolysis reactor, a gasification reactor, a reforming reactor, a regeneration reactor and heat pipes. In the technological process, biomass is firstly pretreated with a sylvite solution, the pretreated biomass is subjected to pyrolysis in the pyrolysis reactor, coke is gasified in the gasification reactor, the gasification reactor and the regeneration reactor generate hydrogen-rich gas through circulation bed material heat loading and CO2 absorption, and the hydrogen-rich gas enters the reforming reactor to carry out hydrogenation catalytic cracking and reforming on pyrolysis gas. Therefore, the synthesis gas with low tar and high-concentration H2 and CO is obtained through step-by-step pyrolysis, gasification, reforming and regenerative combustion at mild reaction temperature, meanwhile, potassium-rich agricultural fertilizer is by-produced, stepped transfer of heat in the biomass thermo-chemical conversion process is achieved, the energy utilization efficiency is improved, and economic additional value is increased.

Description

technical field [0001] The invention relates to a biomass gasification method and a device system thereof, belonging to the field of utilization of biomass resources. Background technique [0002] Biomass gasification is one of the important ways of thermochemical conversion and utilization of biomass. The synthesis gas produced can be used as gas fuel and intermediate products of chemical products such as methanol, dimethyl ether and FT synthetic oil. Biomass gas technology has important practical application value. The main problems of the current biomass thermochemical conversion pathways are (1) there is a large amount of N in the syngas when using air for direct gasification; 2 , leading to low calorific value and poor quality of the syngas; (2) tar in the gasification product not only affects the gas quality, but also affects the normal operation of downstream equipment. When catalytic reforming of tar is carried out, it is easy to cause carbon deposition and deactiva...

Claims

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Application Information

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IPC IPC(8): C10J3/60C10J3/72C10J3/84
CPCC10K3/023C10J3/60C10J3/721C10J3/84C10J2300/0906C10J2300/0909C10J2300/092C10J2300/1603C10J2300/1656C10J2300/1662
Inventor 肖军吕潇孙亭亭李巧沈来宏
Owner SOUTHEAST UNIV
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