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A kind of lignin separation and steam cracking system and method

A cracking system and lignin technology, which is applied in the preparation of hydrocarbon oil, liquid hydrocarbon mixture, petroleum industry, etc., can solve the problems of unstable cracking process, difficult control of gasifier, low product quality, etc., and achieve low working temperature , stable cracking process and high extraction recovery

Active Publication Date: 2019-07-26
INT CENT FOR BAMBOO & RATTAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a lignin separation and steam cracking system and its method to solve the defects in the prior art that the gasification furnace is difficult to control, the calorific value is low, the product quality is low, the equipment is easily damaged, and the cracking process is unstable

Method used

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  • A kind of lignin separation and steam cracking system and method
  • A kind of lignin separation and steam cracking system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Embodiment 1: extract lignin and steam cracking in bamboo processing residue

[0065] Including the following steps:

[0066] (1) Grinding the bamboo processing residues to a particle size of less than 2 cm, adding 100 g of bamboo powder to 500 mL of an aqueous solution of sodium hydroxide (4%) and sodium sulfide (2%), heating to 180 ° C for 1 h, and naturally After cooling, vacuum filter to separate solid and liquid to obtain lignin-containing filtrate.

[0067] (2) After the filtrate that step (1) is obtained is preheated, enter the radiant section and carry out preliminary cracking reaction; Meanwhile, the water vapor stream that will contain 0.2% hydrogen is preheated, and at the outlet of the radiant section, the stream containing hydrogen Mix with the primary cracking product in the radiation section for further cracking and hydrogenation reaction;

[0068] (3) Inject the cracking reaction product finally obtained in step (2) into a quenching heat exchanger for ...

Embodiment 2

[0074] The difference between this embodiment and embodiment 1 is that in step (2) the steam stream containing 0.5% hydrogen is preheated.

Embodiment 3

[0076] The difference between this embodiment and embodiment 1 is only that 100g poplar wood powder is added to the above-mentioned aqueous solution in step (1).

[0077] The invention discloses a lignin separation and steam cracking system and its method, which have the following beneficial effects:

[0078] 1. Use lye to separate lignin from lignocellulosic raw materials, and use steam as an oxidant to crack lignin, then generate bio-oil and biogas through hydrogenation reaction, and enzymatic hydrolysis and saccharification of residues rich in cellulose and hemicellulose have high efficiency , and the equipment is simple, the working temperature of the whole system is low, the cracking process is stable, the process is simple and easy to implement, environmental protection and low toxicity, the recovery rate of lignin extraction is high, the efficiency of cellulose saccharification is high, and it is easy to realize industrialization;

[0079] 2. Preliminary separation and ...

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Abstract

The invention relates to the technical field of agricultural and forestry biomaterial utilization, and discloses a lignin separation and steam cracking system and a method thereof. The lignin separation and steam cracking system comprises a cooking reaction kettle, a preheating device, a radiation cracking device, a quenching device and a recovery processing mechanism connected sequentially. The lignin is separated from the lignocellulosic raw materials by alkali lye and is decomposed by steam as an oxidizing agent, bio-oil and bio-gas are produced through hydrogenation reaction, residues rich in cellulose and hemicellulose have high efficiency in enzymatic saccharification, the device is simple, the whole system operating temperature is low, the cracking process is stable, the process is simple, environmentally environment-friendly and low in toxicity, the lignin extraction and recovery rate is high, holocellulose saccharification efficiency is high, and industrialization is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of utilization of agricultural and forestry biological data, in particular to a lignin separation and steam cracking system and a method thereof. Background technique [0002] The energy and environment crisis is one of the main obstacles to the sustainable development of human society in the 21st century. Making biomass fuels and bio-based products from the most abundant and cheapest renewable lignocellulosic raw materials on earth is one of the effective ways to address the above barriers. [0003] In lignocellulosic raw materials, cellulose accounts for 35% to 45%, hemicellulose accounts for 20% to 40%, and lignin accounts for 20% to 30%. Cellulose and hemicellulose can be hydrolyzed and saccharified to produce a series of sugar platform compounds, including liquid fuels such as bioethanol and biobutanol, and chemicals such as furfural and xylitol. Cellulose can also be used to prepare functionalized cel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/06
CPCC10G1/06C10G2300/1014
Inventor 李志强江泽慧费本华覃道春
Owner INT CENT FOR BAMBOO & RATTAN
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