CN104449793A

CN104449793A - Biomass liquefaction system

Info

Publication number: CN104449793A
Application number: CN201410764533.7A
Authority: CN
Inventors: 常厚春; 马革; 杨红斌; 孙国家
Original assignee: SUZHOU DISEN BIOLOGICAL ENERGY CO Ltd; Guangzhou Devotion Thermal Technology Co Ltd
Current assignee: SUZHOU DISEN BIOLOGICAL ENERGY CO Ltd; Guangzhou Devotion Thermal Technology Co Ltd
Priority date: 2014-12-11
Filing date: 2014-12-11
Publication date: 2015-03-25

Abstract

The invention discloses a biomass liquefaction system, which comprises a drying oven, a fluidized bed reactor, a gas-solid separator and a two-stage spray tower, wherein a discharge outlet of the drying oven is communicated with a feed inlet of the fluidized bed reactor, a cracking gas outlet of the fluidized bed reactor is communicated with a cracking gas inlet of the gas-solid separator, a cracking gas outlet of the gas-solid separator is communicated with a cracking gas inlet of the two-stage spray tower, and a non-condensable gas outlet of the two-stage spray tower is communicated with a hearth of the drying oven; and the bottom of the fluidized bed reactor is communicated with an air blower with the output air velocity of 600-800m<3>/h and pressure of 2-4kpa. The air blower is used for supplying low-velocity air for the bottom of the fluidized bed reactor, a biomass fuel is at a gently rolling state and has slow gasification reaction, the yield of cracking gas can be increased, the carbon yield can be reduced and the cracking gas contains extremely low heat carriers, an auxiliary reactor is omitted, and the system running safety can be improved.

Description

Biomass liquefaction system

Technical field

The invention belongs to liquefaction technology field, specifically relate to a kind of system utilizing biomass fuel liquefaction to prepare ecological oil.

Background technology

The main process of ecological oil preparation technology is: biomass material reacts and produces splitting gas in ebullated bed reactor, the charcoal contained in gas and thermal barrier are separated through the gas solid separation step of separator by splitting gas, clean splitting gas through condensing tower cooling step formed ecological oil, and not condensated gas it directly need be diffused all burnt or recycle supply stoving oven burning produce heat energy to dry biomass material.

The gasification reaction system of prior art adopts circulating fluidized bed as main reactor, belong to Quick-gasifying reaction, the output of splitting gas is lower, and due to the combined amount of the charcoal that contains in gas and thermal barrier more, therefore, the subsequent step of gas-solid separator also needs to increase auxiliary reactor, utilize charcoal and thermal barrier Thorough combustion Posterior circle to be inputed to circulating fluid bed reactor, the composition structure of whole system is seemed, and redundancy is complicated, recycle charcoal comes, to thermal barrier additional heat, to add system cloud gray model risk.Condensated gas is not in constantly recycle process, requires higher to the stopping property of system and oxygen level.

Summary of the invention

In order to solve prior art Problems existing, the invention provides that a kind of ecological oil output is high, the biomass liquefaction system of system simplification, safety.

In order to realize above object, the technical scheme that the present invention takes is: a kind of biomass liquefaction system, comprises the stoving oven of drying biomass material, twin-stage spray column that the ebullated bed reactor producing splitting gas, the gas-solid separator isolating splitting gas and solids, condensation splitting gas become ecological oil; The discharge port of stoving oven is communicated with the opening for feed of ebullated bed reactor, the splitting gas entrance of the splitting gas outlet gas-solid separator of ebullated bed reactor, the splitting gas entrance of the splitting gas outlet twin-stage spray column of gas-solid separator, the burner hearth of the not condensated gas outlet stoving oven of twin-stage spray column; It is 600 ~ 800m that the bottom of described ebullated bed reactor is communicated with an output wind speed ³/ h and pressure is the gas blower of 2 ~ 4kpa.

Compared with prior art, the advantage of liquefaction system of the present invention is: by being communicated with a gas blower at ebullated bed reactor, and gas blower provides wind speed to be 600 ~ 800m bottom boiling reactor ³/ h and pressure is the low velocity wind of 2 ~ 4kpa, the biomass fuel of ebullated bed reactor inside produces mild tumbling state, anti-raw gasification reaction at a slow speed simultaneously, improve splitting gas output, reduce carbon yield and containing the thermal barrier of very low amounts in splitting gas, save auxiliary reactor, improve system cloud gray model security.

Accompanying drawing explanation

Fig. 1 is the structural representation of biomass liquefaction system.

Embodiment

As shown in Figure 1, biomass liquefaction system comprises stoving oven, ebullated bed reactor, gas-solid separator, twin-stage spray column and gas blower.

Stoving oven exports dried biomass fuel and inputs ebullated bed reactor by pipeline, the gas that ebullated bed reactor scission reaction produces inputs gas-solid separator by tracheae, the gas of gas-solid separator is by tracheae input twin-stage spray column, and the gas of twin-stage spray column inputs the burner hearth of stoving oven by tracheae.

The principle of work of biomass liquefaction system is: thermal barrier (sand) is present in the medium as heating in ebullated bed reactor.Stoving oven inputs ebullated bed reactor after being dried by biomass wet feed material, and now, it is 600 ~ 800m that ebullated bed reactor sends into wind speed from bottom by gas blower ³/ h and pressure are that the air of 2 ~ 4kpa participates in incomplete combustion reaction, biomass fuel produces mild tumbling state, anti-raw gasification reaction at a slow speed simultaneously, after scission reaction, produce splitting gas enter gas-solid separator, the clean splitting gas separated enters twin-stage spray column, condensated gas in splitting gas is condensed into as ecological oil, not condensated gas then circulation and stress input to stoving oven burning.The a small amount of charcoal contained in the splitting gas that ebullated bed reactor produces stores after gas-solid separator is separated with powder thermal barrier mixture.

Claims

1. a biomass liquefaction system, comprises the stoving oven of drying biomass material, twin-stage spray column that the ebullated bed reactor producing splitting gas, the gas-solid separator isolating splitting gas and solids, condensation splitting gas become ecological oil;

The discharge port of stoving oven is communicated with the opening for feed of ebullated bed reactor, the splitting gas entrance of the splitting gas outlet gas-solid separator of ebullated bed reactor, the splitting gas entrance of the splitting gas outlet twin-stage spray column of gas-solid separator, the burner hearth of the not condensated gas outlet stoving oven of twin-stage spray column;

It is characterized in that: it is 600 ~ 800m that the bottom of described ebullated bed reactor is communicated with an output wind speed ³/ h and pressure is the gas blower of 2 ~ 4kpa.