CN206843386U

CN206843386U - A kind of Two-way Cycle Circulating Fluidized Bed Gasifier For Biomass

Info

Publication number: CN206843386U
Application number: CN201720755826.8U
Authority: CN
Inventors: 别如山; 陈佩; 曹森; 张孝禹; 张里华
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2017-06-27
Filing date: 2017-06-27
Publication date: 2018-01-05
Anticipated expiration: 2027-06-27

Abstract

A kind of Two-way Cycle Circulating Fluidized Bed Gasifier For Biomass, belong to biomass gasification technology field, further increase the gasification efficiency of biomass, it includes gasification furnace, primary cyclone, secondary cyclone and three-stage cyclone separator, burner hearth exhanst gas outlet on the upside of gasification furnace is connected by the import of accelerating sections and primary cyclone, the outlet of primary cyclone bottom is connected by one-level feeding back device with the burner hearth of gasification furnace, outlet at the top of primary cyclone is connected by the import of accelerating sections and secondary cyclone, outlet at the top of secondary cyclone is connected by the import of accelerating sections and three-stage cyclone separator, the outlet of secondary cyclone bottom is connected by two level feeding back device with the burner hearth of gasification furnace；The outlet of three-stage cyclone separator bottom is connected with ash collecting device；The primary cyclone, secondary cyclone and three-stage cyclone separator use circulation whirlwind separator；The utility model is used for gasification of biomass.

Description

A kind of Two-way Cycle Circulating Fluidized Bed Gasifier For Biomass

Technical field

The utility model belongs to biomass gasification technology field, and in particular to a kind of Two-way Cycle biomass circulating fluidized bed gas Change stove.

Background technology

China is large agricultural country, and biomass energy reserves are very abundant, occupied an important position in whole energy resource system, and And there is good development prospect；Gasification of biomass is to carry out thermochemical study to biomass, produces a kind of skill of fuel gas Art, it is the important channel of biomass utilization, its principle is that biomass is carried out into imperfect combustion under anoxic conditions, is produced small CO, H of molecule₂、CH₄Deng fuel gas, have the advantages that environmental protection and utilization rate are higher；Recirculating fluidized bed is due to stable, just It is the biomass gasification device generally used at present, but gasification of biomass is carried out using existing recirculating fluidized bed in regulation When residual carbon content be up to ten to five 12 percent, remaining carbon is higher shows caused by the carbon containing combustible gas scale of construction it is lower, i.e. biology The gasification efficiency of matter is lower, and this programme is researched and developed to further improve the gasification efficiency of biomass；It is practice have shown that existing Circle fluidized-bed gasification furnace residual carbon content it is high the reason for be：The material of only one separator separation participates in circulation, circulation times Rate is relatively low, such as the patent No.（Publication number）For：201120162620.7（CN202072674U）、201320525708.X （CN203513612U）、201420134817.3（CN203741284U）、201620854679.5（CN205917216U）Institute is public The gasification furnace opened；Because biomass is very light, one cyclonic separative efficiency is relatively low, in order to improve total efficiency of separation, the patent No.（It is open Number）For：201310294080.1（CN103320174A）Disclosed gasification furnace adds cyclone separator serial number, but should Second separator separation ash is sent into the dipleg of the first separator by patent, and gasification is sent into by first return material valve for separator It is bulky because biomass ash bulk density is small in stove, cause feed back difficult, be frequently occluded so that the second separator separates Ash smooth can not be returned in the first separator dipleg, so as to cause the second separator ineffective；In addition, all of above patent is equal Using conventional cyclones, the resistance of each separator is for one kPa to 1,500 pas, and resistance is excessive, and air-introduced machine power consumption is big Width increase, performance driving economy decline.

The content of the invention

The purpose of this utility model is to further improve the gasification efficiency of biomass, there is provided a kind of Two-way Cycle biology Matter circle fluidized-bed gasification furnace, its technical scheme are as follows：

A kind of Two-way Cycle Circulating Fluidized Bed Gasifier For Biomass, it includes gasification furnace, primary cyclone, two level whirlwind Separator and three-stage cyclone separator, burner hearth exhanst gas outlet on the upside of gasification furnace are entered by accelerating sections and primary cyclone Mouth connection, the outlet of primary cyclone bottom are connected by one-level feeding back device with the burner hearth of gasification furnace, one cyclonic point Connected from the outlet at the top of device by the import of accelerating sections and secondary cyclone, the outlet at the top of secondary cyclone leads to The import for crossing accelerating sections and three-stage cyclone separator connects, the outlet of secondary cyclone bottom by two level feeding back device with The burner hearth connection of gasification furnace, primary cyclone and the secondary cyclone feed back all directly into burner hearth, can guarantee that feed back It is smooth；The primary cyclone, secondary cyclone and three-stage cyclone separator use circulation whirlwind separator, The structure of circulation whirlwind separator is CN2577970Y by notification number, and the patent of entitled circumfluent cyclone is public To open, circulation whirlwind separator uses the structure of circumfluent cyclone, has that windage is small, the advantages of separative efficiency is high, and three Pa of total windage about 1,800 of individual separator or so, only about half of three conventional cyclones or so.

The beneficial effects of the utility model are：Using double circulation structure, it is reasonable that loop is set, and feed back is smooth, further drop Fly at low altitude grey carbon left, improves gasification efficiency；Used cyclone separator windage is small, and separative efficiency is high, through experiment, flying dust carbon residue Amount is less than 1 15.

Brief description of the drawings：

Fig. 1 is the utility model overall structure diagram.

Embodiment：

Reference picture 1, a kind of Two-way Cycle Circulating Fluidized Bed Gasifier For Biomass, it includes gasification furnace 1, primary cyclone 2nd, secondary cyclone 3 and three-stage cyclone separator 4, the burner hearth exhanst gas outlet of the upside of gasification furnace 1 pass through accelerating sections and one-level The import connection of cyclone separator 2, the outlet of the bottom of primary cyclone 2 pass through one-level feeding back device 5 and the stove of gasification furnace 1 Thorax is connected, and the outlet at the top of primary cyclone 2 is connected by accelerating sections with the import of secondary cyclone 3, two level rotation The outlet at the top of wind separator 3 is connected by accelerating sections with the import of three-stage cyclone separator 4, the bottom of secondary cyclone 3 Outlet connected by two level feeding back device 6 with the burner hearth of gasification furnace 1, primary cyclone 2 and secondary cyclone 3 are all The feed back directly into burner hearth, it can guarantee that feed back is smooth；The primary cyclone 2, secondary cyclone 3 and three-level whirlwind Separator 4 uses circulation whirlwind separator, and the structure of circulation whirlwind separator is CN2577970Y by notification number, name The patent of referred to as circumfluent cyclone discloses, and circulation whirlwind separator uses the structure of circumfluent cyclone, tool There are the advantages of windage is small, and separative efficiency is high, the pa of total windage about 1,800 of three separators or so, only about three routines Half of cyclone separator or so.

The outlet of the bottom of three-stage cyclone separator 4 is connected with ash collecting device 7, for caused by biomass collection after-flame Flying dust carries out secondary use.

The outlet at the top of three-stage cyclone separator 4 is connected with fuel gas combustion equipment 8, available for combustion power generation or produces steam Heat supply etc..

Claims

1. a kind of Two-way Cycle Circulating Fluidized Bed Gasifier For Biomass, it includes gasification furnace (1), primary cyclone (2), two level Cyclone separator (3) and three-stage cyclone separator (4), the burner hearth exhanst gas outlet on the upside of gasification furnace (1) pass through accelerating sections and one-level The import connection of cyclone separator (2), the outlet of primary cyclone (2) bottom pass through one-level feeding back device (5) and gasification The burner hearth connection of stove (1), outlet at the top of primary cyclone (2) are entered by accelerating sections and secondary cyclone (3) Mouth is connected, and the outlet at the top of secondary cyclone (3) is connected by accelerating sections with the import of three-stage cyclone separator (4), its It is characterised by that the outlet of secondary cyclone (3) bottom is connected by two level feeding back device (6) with the burner hearth of gasification furnace (1)； The primary cyclone (2), secondary cyclone (3) and three-stage cyclone separator (4) are using circulation whirlwind point From device, circulation whirlwind separator uses the structure of circumfluent cyclone.

A kind of 2. Two-way Cycle Circulating Fluidized Bed Gasifier For Biomass as claimed in claim 1, it is characterised in that three-stage cyclone separation The outlet of device (4) bottom is connected with ash collecting device (7).

A kind of 3. Two-way Cycle Circulating Fluidized Bed Gasifier For Biomass as claimed in claim 1, it is characterised in that three-stage cyclone separation Outlet at the top of device (4) is connected with fuel gas combustion equipment (8).