CN201447461U

CN201447461U - Fixed bed straw gasification device with tar backflash

Info

Publication number: CN201447461U
Application number: CN 200920042267
Authority: CN
Inventors: 林冲; 陈勇; 孙昌栋
Original assignee: XUZHOU COMBUSTION CONTROL RESEARCH INSTITUTE Co Ltd
Current assignee: XUZHOU COMBUSTION CONTROL RESEARCH INSTITUTE Co Ltd
Priority date: 2009-03-20
Filing date: 2009-03-20
Publication date: 2010-05-05
Anticipated expiration: 2019-03-20

Abstract

The utility model relates to a fixed bed straw gasification device with tar backflash. In the device, a cylindrical gasifier is arranged and is divided into a down draft type fixed bed gasifier and an up draft type fixed bed gasifier, wherein gasifying air enters the down draft type fixed bed gasifier from the lower part and enters the up draft type fixed bed gasifier from the upper part; an ejector used for ejecting an air flow is installed on the side wall of the gasifier and is sequentially communicated with an airway, a filter dust collector, an airway, a tar catcher, a tar collection groove, a backflash pipe, a liquid seal elbow pipe, a backflash pipe and a lighter through the upper part and the lower part of the side wall thereof so as to inject the collected tar into the gasifier to continuously carry out combustion. The utility model greatly lowers the tar content in fuel gas, realizes tar automatic backflash, enhances the whole gasification efficiency, a fuel gas calorific value and the gas quality and also solves the problem of secondary pollution of the tar.

Description

A kind of fixed bed straw gasification device with tar backflash

Technical field

The utility model relates to and a kind ofly removes tar and utilize gas injection method to impel the gasifying stalk device of tar backflash with inertia cooling, a kind of fixed bed straw gasification device with tar backflash.

Background technology

With regard to gasifying stalk, no matter be to adopt fixed bed or fluidized-bed gasification device, in reaction process, because the restriction of gasification temperature and reaction conditions contains tar inevitably in the combustion gas.When fuel gas temperature reduces, the tar in the combustion gas cold wall condense and with combustion gas in dust adhere to mutually, form grease.Grease is constantly accumulation on follow up device or pipeline, will cause the obstruction of device and pipeline, and what make vapourizing furnace can't works better, and it is also difficult unusually to clear up these greases.Existing gasifying stalk device has mostly adopted the mode of traditional washing decoking, and this mode not only tar is difficult to recycle, and pollutes but also can produce secondary wastewater.Because tar itself has certain calorific value, throw aside and can cause system energy loss.

The utility model content

In order to overcome the problem that exists in the gasifying stalk, the utility model provides a kind of fixed bed straw gasification device with tar backflash, this device can realize that tar strile-backs automatically, avoid clearing up the inconvenience that tar brings, improved gasification efficiency, improve the calorific value of combustion gas, also reduced the cost of gasifying stalk, also solved tar to the second environmental pollution problem simultaneously.

The technical scheme that its technical problem that solves the utility model adopts is: in this device, the vapourizing furnace that a tubular is arranged, this vapourizing furnace are divided into the updraft type fixed-bed gasification furnace that the gasification downdraft fixed-bed gasification furnace that enters from the bottom of wind and gasification wind enter from top; On the sidewall of this vapourizing furnace, the injector of injection air-flow is installed; This vapourizing furnace is by its sidewall top and the bottom, and order is communicated with airway, filter collector, airway, tar trap, collects burnt groove, the pipe that strile-backs, fluid-tight bend pipe, strile-back and manage and the pipe that strile-backs of pilot burner, makes the tar of collection be injected into vapourizing furnace and burns away; Wherein, the high-temperature gas of discharging through vapourizing furnace is in filter collector, earlier high-temperature gas is carried out dedusting, through the tar trap, utilize inertia and the method that combines of cooling to capture tar in the combustion gas, the tar that captures, in injector by under the effect of gas injection power and self gravitation, drained into the high-temperature oxygen-enriched district of vapourizing furnace, tar burns and cracking under high-temperature oxygen-enriched condition.

Its beneficial effect is: the utility model has realized that tar strile-backs automatically, and the inconvenience of having avoided cleaning tar to bring has improved gasification efficiency, has improved the calorific value of combustion gas, and the cost that has reduced gasification has also solved the secondary pollution problem of tar simultaneously.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and the embodiments;

Accompanying drawing 1 is a downdraft fixed-bed gasification structure iron of the present utility model;

Accompanying drawing 2 is the updraft type fixed-bed gasification structure iron of invention.

Among Fig. 1, Fig. 2,1. vapourizing furnace, 2. ash releasing tube, 3. filter collector, 4. airway, 5. airway, 6. tar trap, 7. water cooler, 8. gas outlet pipe, the 9. burnt groove of collection, pipe 10. strile-backs, 11. the fluid-tight bend pipe, 12. pipes that strile-back, 13. injectors, 14. injection air inlet tubes, 15. gasification wind inlet tubes.

Embodiment

In the drawings, in this device, there are the vapourizing furnace 1 of a tubular, this vapourizing furnace 1 to be divided into the updraft type fixed-bed gasification furnace (Fig. 2-1) that downdraft fixed-bed gasification furnace (Fig. 1-1) that gasification wind enters from the bottom and gasification wind enter from top; On the sidewall of this vapourizing furnace 1, the injector 13 of injection air-flow is installed, by its sidewall top and the bottom, order is communicated with airway 4, filter collector 3, airway 5, tar trap 6, the burnt groove 9 of collection, the pipe 10 that strile-backs, fluid-tight bend pipe 11, strile-back pipe 12 and pilot burner 13, makes the tar of collection be injected into vapourizing furnace 1 and burns away; Wherein, the high-temperature gas of discharging through vapourizing furnace 1 is in filter collector 3, earlier high-temperature gas is carried out dedusting, 6 li of tar traps, the method for utilizing inertia to combine with cooling captures the tar in the combustion gas, the tar that captures, under the condition of insulation more than 100 ℃, by under the effect of gas injection power and self gravitation, drained into the high-temperature oxygen-enriched district of vapourizing furnace in injector 13, tar burns and cracking under high-temperature oxygen-enriched condition.

In the drawings, be provided with water cooler 7 in tar trap 6, water cooler 7 is connected with heat-eliminating medium, adopts the gap heat exchange mode that combustion gas is lowered the temperature, and agglomerative tar drop enters into water cooler 7 and carries out wall and capture in the combustion gas under inertia effect; The design fluid-tight bend pipe 11 and injector 13 structures guarantee air not can with combustion gas mixing.

In the drawings, filter collector 3 and airway 4, airway 5 all adopt the lagging material thermal insulation; Collect burnt groove 9, the pipe 10 that strile-backs, the pipe 12 that strile-backs, fluid-tight bend pipe 11 and injector 13 all adopt hot blast (or combustion gas) to carry out temperature control companion heat, to guarantee the flowability of tar in the pipe.

In the drawings, utilize airflow injection and gravity fluid-tight mode to prevent that air from returning leap up (with combustion gas mixing); Consider the sensible heat deficiency of tar self, should make the pipeline that strile-backs keep temperature more than 105 ℃, the pipe that strile-backs adopts hot blast or combustion gas to carry out temperature control companion heat more than 150 ℃, guarantees the flowability of tar.

Claims

1. fixed bed straw gasification device with tar backflash; It is characterized in that: in this device, the vapourizing furnace (1) of a tubular is arranged, this vapourizing furnace (1) is divided into the updraft type fixed-bed gasification furnace that the gasification downdraft fixed-bed gasification furnace that enters from the bottom of wind and gasification wind enter from top; On the sidewall of this vapourizing furnace (1), the injector (13) of injection air-flow is installed, by its sidewall top and the bottom, order is communicated with airway (4), filter collector (3), airway (5), tar trap (6), collects burnt groove (9), the pipe (10) that strile-backs, fluid-tight bend pipe (11), strile-back pipe (12) and pilot burner (13), makes the tar of collection be injected into vapourizing furnace (1) and burns away.

2. a kind of fixed bed straw gasification device according to claim 1 with tar backflash; It is characterized in that: be provided with water cooler (7) in tar trap (6), water cooler (7) is connected with heat-eliminating medium.

3. a kind of fixed bed straw gasification device according to claim 1 with tar backflash; It is characterized in that: filter collector (3) and airway (4), airway (5), all adopt the lagging material thermal insulation; Collect burnt groove (9), the pipe (10) that strile-backs, the pipe (12) that strile-backs, fluid-tight bend pipe (11) and injector (13) all adopt hot blast or combustion gas to carry out temperature control companion heat.