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Method and device for preparing biological oil by biomass cracking

A biomass thermal cracking and bio-oil technology, which is applied in the field of biomass regeneration and energy utilization, can solve the problems of low energy utilization rate and poor production continuity, solve the problem of flue gas emission, reduce the total cost, system simple structure

Inactive Publication Date: 2009-09-30
JIANGSU UNIV
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Problems solved by technology

[0003] The main purpose of the present invention is to propose a self-heating and pollution-free method for producing bio-oil by pyrolysis of biomass in view of the shortcomings of low energy utilization rate and poor continuity of actual production in the existing biomass pyrolysis liquefaction process

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  • Method and device for preparing biological oil by biomass cracking
  • Method and device for preparing biological oil by biomass cracking

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Embodiment

[0027] The implementation scheme of this embodiment is as follows:

[0028] (1) Raw material pretreatment: In this embodiment, corn stalks are used as biomass materials. In order to increase the yield of bio-oil, a high heating rate is necessary, so the materials are required to have a small enough particle size, and the biomass powder is crushed to Particle size 1-2mm. In order to avoid excessive moisture in the raw material being brought into the bio-oil, the raw material should be dried. According to the actual production situation, the high-temperature flue gas discharged from the lower layer 8 of the heat carrier heating device in the device system is used to provide heat energy for the raw material drying chamber 21, and dry the biomass powder to a moisture content of less than 8%.

[0029] (2) Heating heat carrier: heat the heat carrier (the fuel is coal gas when used for the first time, and the pyrolysis product charcoal and non-condensable gas after circulation), so ...

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Abstract

The invention provides a method and a device for preparing biological oil by biomass cracking. Biomass material is prepared into the biological oil after being smashed, dried, thermally cracked, secondarily condensed and separated. The device mainly comprises a feeding system, a fluidized bed reactor, a heat carrier separator, a gas-solid separator, a heat carrier heating device, a condenser, and the like, wherein the heat carrier heating device is divided into two layers which are partitioned by a heat insulated board and evenly distributed with a plurality of ceramic heat pipes used as a heating carrier of a heat transfer element. The invention not only utilizes subsidiary product of thermal cracking, namely carbon and non-condensable gas as energy sources for thermal cracking liquification, but also effectively utilizes the smoke discharged by the heat carrier heating device as fluidizing gas, thereby having various advantages of reasonable process, no secondary pollution, energy saving, low cost, and the like. Compared with the prior art, the invention is easier to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of biomass regeneration and utilization and its energy conversion, in particular to a method and a device for producing bio-oil by pyrolysis and liquefaction of biomass. Background technique [0002] Biomass pyrolysis refers to the process in which biomass is heated and cooled in a very short period of time under the condition of complete absence of oxygen or anoxic, and finally generates bio-oil, charcoal and non-condensable gas. A variety of different test devices and technical routes have been adopted abroad to achieve the purpose of increasing the yield of bio-oil and improving the level of energy utilization. Some methods for preparing bio-oil are also disclosed in the prior art, but most of them are limited by the cost of consuming high-grade energy and electric energy or there are moving parts in the reactor, the structure is complicated, and the working reliability and operating life are difficult to...

Claims

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Application Information

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IPC IPC(8): C10G1/00
Inventor 王谦成珊李阳
Owner JIANGSU UNIV
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