CN103952186B - There is the down-draft type gasifying furnace of tar degradation function - Google Patents
There is the down-draft type gasifying furnace of tar degradation function Download PDFInfo
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- CN103952186B CN103952186B CN201410179572.0A CN201410179572A CN103952186B CN 103952186 B CN103952186 B CN 103952186B CN 201410179572 A CN201410179572 A CN 201410179572A CN 103952186 B CN103952186 B CN 103952186B
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Abstract
The down-draft type gasifying furnace with tar degradation function disclosed by the invention comprises burner hearth, lower furnace portion has ring-type reducing, material inlet is had at roof of the furnace, ash output hole is arranged at bottom, wall above the reducing of burner hearth ring-type is provided with vertically the tangential air distribution outlet of upper, middle and lower three grades, tube-typed grate is equipped with between the ring-type reducing and bottom deslagging mouth of lower furnace portion, tube-typed grate is made up of the hollow steel tube be spaced, hollow steel tube is drilled with the hole as secondary air distribution outlet, vertical flue is had outside burner hearth, one end of the horizontal flue concordant with tube-typed grate is communicated with burner hearth, the other end is communicated with vertical flue, air outlet is had on the top of vertical flue, top is provided with calcium based catalysts jet apparatus.This downdraft gasification furnace structure is simple, has tar self-purification capacity, can ensure that the tar gasified in gas had carried out sufficient decomposition before leaving burner hearth, thus obtain the gasification gas of higher quality.
Description
Technical field
The present invention relates to a kind of down-draft type gasifying furnace with tar degradation function, belong to changing rejected material to useful resource clean utilization technical field.
Background technology
At present, the disposal of waste is the great difficult problem that society is badly in need of solving, and wherein gasification technology is the method for a kind of clean and effective disposing waste.Waste gasification carries out pyrolytic gasification under the environment in the devices such as fixing vapourizing furnace, waste being placed in a high-temperature low-oxygen, thus obtain a kind of method of inflammable gas.In numerous vapourizing furnaces, fixed bed is simple, easy to operate with its structure, fuel tolerance is wide, invest the advantage such as low occupies critical role.Traditional fixed-bed gasification furnace mainly comprises updraft type fixed-bed gasification furnace and downdraft fixed-bed gasification furnace, but all there is very large problem in order first two vapourizing furnace, as due to shorter at residing time in furnace, the coal-tar middle oil content of gasification gas is higher, easily stick after temperature reduces and form blocking at burner hearth back-end ductwork, be unfavorable for the steady running of vapourizing furnace.And owing to containing tar in gasification gas, add the difficulty of gasification gas later purification process.Therefore, be badly in need of developing a kind of vapourizing furnace with tar self-purification capacity, to ensure that the tar gasified in gas had carried out sufficient decomposition before leaving burner hearth, thus obtain the gasification gas of higher quality.
Summary of the invention
The object of the invention is to propose a kind of down-draft type gasifying furnace with tar degradation function for solving the coal-tar middle oil too high levels of waste gasification process.
The down-draft type gasifying furnace with tar degradation function of the present invention comprises burner hearth, lower furnace portion has ring-type reducing, material inlet is had at roof of the furnace, ash output hole is arranged at bottom, wall above the reducing of burner hearth ring-type is provided with vertically the tangential air distribution outlet of upper, middle and lower three grades, tube-typed grate is equipped with between the ring-type reducing and bottom deslagging mouth of lower furnace portion, tube-typed grate is made up of the hollow steel tube be spaced, the court of hollow steel tube is drilled with the hole as secondary air distribution outlet above, vertical flue is had outside burner hearth, one end of the horizontal flue concordant with tube-typed grate is communicated with burner hearth, the other end is communicated with vertical flue, air outlet is had on the top of vertical flue, top is provided with calcium based catalysts jet apparatus.
In the present invention, the every one-level in the tangential air distribution outlet of described upper, middle and lower three grades all has 3-5 tangential air distribution outlet along burner hearth circumference.
The present invention has following features: material sends into burner hearth from roof of the furnace opening for feed, in decline process, mix with the wind that once gasifies, and carry out pyrolytic gasification through high-temperature zone, the upper, middle and lower graduation three wind arranged vertically enters in stove in a tangential manner, in stove, define an eddy flow region, contribute to extending the residence time of material in high-temperature zone; Second gasification wind be arranged in the fluidisation area that fire grate upper space forms a local, not only contribute to falling ash, and can ensure that fixed carbon is gasified totally, make bed remain on the high temperature of one more than 750 DEG C, the degraded of the gas coal-tar middle oil composition of contributing to gasifying.The layout of vertical flue can extend the residence time of gasification gas, and calcium based catalysts sprays the thorough degraded that effectively can realize the coal-tar middle oil composition of synthetic gas.
Structure of the present invention is simple, has tar self-purification capacity, can ensure that the tar gasified in gas had carried out sufficient decomposition before leaving burner hearth, thus obtain the gasification gas of higher quality.
Accompanying drawing explanation
Fig. 1 is the down-draft type gasifying furnace structural representation with tar degradation function of the present invention.
Fig. 2 is tube-typed grate vertical view.
Fig. 3 is the tangential air distribution outlet schematic diagram of arbitrary level.
Embodiment
With reference to Fig. 1, the down-draft type gasifying furnace with tar degradation function of the present invention, comprise burner hearth 1, lower furnace portion has ring-type reducing, material inlet 12 is had at roof of the furnace, ash output hole 7 is arranged at bottom, burner hearth wall above the reducing of burner hearth ring-type is provided with vertically the tangential air distribution outlet 2 of upper, middle and lower three grades, 3, 4, every one-level all has 4 tangential air distribution outlets (as shown in Figure 2 example) along burner hearth circumference, the wind that can make once to gasify tangentially is injected in stove from the upper, middle and lower three of furnace wall, an eddy flow region is formed in stove, be conducive to gasifying medium and material carries out good mixing, and extend the residence time of material in high-temperature zone.Between the ring-type reducing and bottom deslagging mouth 7 of lower furnace portion, be equipped with tube-typed grate 6, tube-typed grate 6 is made up of the hollow steel tube be spaced, gap between each steel pipe, be beneficial to ash discharge, the court of hollow steel tube is drilled with above shown in the hole 5(Fig. 3 as secondary air distribution outlet), air is passed in steel pipe, gasifying medium in steel pipe sprays in stove through via hole with higher flow velocity, define second gasification wind, higher wind speed by the goods fluid of local space above tube-typed grate 6, can form a local fluidization district.This design not only can make lime-ash fall into ash output hole 7 smoothly, and is conducive to being gasified totally of fixed carbon bottom bed, has greater advantage for the gasification temperature improving this region and the output that reduces tar.Have vertical flue 9 outside burner hearth, one end of the horizontal flue 8 concordant with tube-typed grate is communicated with burner hearth, and the other end is communicated with vertical flue 9, has air outlet 10 on the top of vertical flue, and top is provided with calcium based catalysts jet apparatus 11.
During normal work, material enters burner hearth by material inlet, in decline process, eddy flow disturbance is formed with mixed being incorporated in stove of the once gasification wind tangentially entered in stove, to ensure that material carries out dry and pyrolysis fully in high-temperature zone, then material drops on tube-typed grate and forms accumulation bed, and second gasification wind can make bottom bed form a local fluidization region, facilitates the smooth discharge of lime-ash.In addition, second gasification wind can also promote the complete oxidation of fixed carbon bottom bed, thus ensures that bed temperature maintains more than 750 DEG C.When gasification gas is through bed, tar ingredients wherein at high temperature can be decomposed further, reduces the tar content of gasification gas to a certain extent.The space of ash between tube-typed grate of bed bottommost falls into ash output hole, and then enters ash bucket collection.Gasification gas enters vertical flue by horizontal flue after bed, due to the effect of gravity, the fly ash granule carrying out with gas drops to the bottom of vertical flue, and be conducive to the purification of gasification gas, the gas that gasifies then leaves burner hearth through air outlet, vertical flue top.Calcium based catalysts spray into the second pyrolysis that can promote tar further, to ensure that tar fully decomposed before leaving burner hearth, thus improve outlet gasification gas quality.
Claims (2)
1. there is the down-draft type gasifying furnace of tar degradation function, it is characterized in that comprising burner hearth (1), lower furnace portion has ring-type reducing, material inlet (12) is had at roof of the furnace, ash output hole (7) is arranged at bottom, wall above the reducing of burner hearth ring-type is provided with vertically the tangential air distribution outlet (2 of upper, middle and lower three grades, 3, 4), tube-typed grate (6) is equipped with between the ring-type reducing and bottom deslagging mouth (7) of lower furnace portion, tube-typed grate (6) is made up of the hollow steel tube be spaced, the court of hollow steel tube is drilled with the hole (5) as secondary air distribution outlet above, vertical flue (9) is had outside burner hearth, one end of the horizontal flue (8) concordant with tube-typed grate is communicated with burner hearth, the other end is communicated with vertical flue (9), air outlet (10) is had on the top of vertical flue, top is provided with calcium based catalysts jet apparatus (11).
2. the down-draft type gasifying furnace with tar degradation function according to claim 1, is characterized in that the every one-level in the tangential air distribution outlet (2,3,4) of described upper, middle and lower three grades all has 3-5 tangential air distribution outlet along burner hearth circumference.
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| CN201410179572.0A CN103952186B (en) | 2014-04-30 | 2014-04-30 | There is the down-draft type gasifying furnace of tar degradation function |
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| CN201410179572.0A CN103952186B (en) | 2014-04-30 | 2014-04-30 | There is the down-draft type gasifying furnace of tar degradation function |
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| CN103952186B true CN103952186B (en) | 2015-07-29 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104774650B (en) * | 2015-03-24 | 2017-01-04 | 浙江大学 | There is the U-shaped fixed bed gasification-catalyst reaction device of tar degradation function |
| CN107267219B (en) * | 2017-08-01 | 2023-05-23 | 中国科学院工程热物理研究所 | Tangential air distribution circulating fluidized bed gasification device and gasification method |
| CN110006048A (en) * | 2019-03-27 | 2019-07-12 | 湖南大学 | Integral type gasification furnace |
| CN110003952A (en) * | 2019-03-27 | 2019-07-12 | 湖南人文科技学院 | Air distribution system and gasification furnace with it |
| CN110003953A (en) * | 2019-03-27 | 2019-07-12 | 湖南人文科技学院 | Air distributing device and gasification furnace with it |
| CN111826201A (en) * | 2020-06-10 | 2020-10-27 | 山东大学 | Process, system and application for flash pyrolysis gasification and tar removal of biomass |
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| US8956427B2 (en) * | 2010-12-21 | 2015-02-17 | Msw Power Corporation | Gasification chamber with mass flow wedge members |
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| WO1987004453A1 (en) * | 1986-01-22 | 1987-07-30 | A. Ahlstrom Corporation | Method and apparatus for gasifying carbonaceous material |
| CN2055908U (en) * | 1989-10-17 | 1990-04-11 | 乔庆 | Semi-gas dual-purpose stove for cooking and warming |
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