CN101353582B - Solid heat carrier rapid pyrolysis method and apparatus - Google Patents
Solid heat carrier rapid pyrolysis method and apparatus Download PDFInfo
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- CN101353582B CN101353582B CN2007101194767A CN200710119476A CN101353582B CN 101353582 B CN101353582 B CN 101353582B CN 2007101194767 A CN2007101194767 A CN 2007101194767A CN 200710119476 A CN200710119476 A CN 200710119476A CN 101353582 B CN101353582 B CN 101353582B
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 110
- 239000007787 solid Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 24
- 239000000446 fuel Substances 0.000 claims abstract description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000969 carrier Substances 0.000 claims abstract description 6
- 239000003546 flue gas Substances 0.000 claims abstract description 6
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 5
- 239000003245 coal Substances 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 11
- 239000002028 Biomass Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 5
- 239000003034 coal gas Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000006200 vaporizer Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a method and a device for the quick pyrolysis of solid heat carriers; the device comprises a circulating fluidized bed combustor, a cyclone separator, an aerodynamic hot ash distributor, a pyrolysis chamber and a differential bed material return device; fuel is burnt in the circulating fluidized bed combustor, the high-temperature circulation ash of flue gas collected by the cyclone separator is divided into two parts by the hot ash distributor aerodynamically controlled, one part enters the pyrolysis chamber of a moving bed as the solid heat carrier to supply heat for flue pyrolysis, the other part does not enter the pyrolysis chamber but returns to the combustor, together with the semicoke and circulation ash discharged from the bottom of the pyrolysis chamber through the differential bed material return device. The method and the device for the quick pyrolysis of solid heat carrier provided by the invention can distribute the high-temperature circulation ash between combustion and pyrolysis loops stably and reliably, with controllable temperature of the pyrolysis chamber, strengthen the balance capacity between combustion and pyrolysis by virtue of a hot ash cooler, have good adaptability of the flue, and can be used for the pyrolysis of coal, biomass and other carbonaceous refuses.
Description
Technical field
The present invention relates to a kind of pyrolysis of coal method and a kind of pyrolysis of coal device.
Technical background
There are two kinds of forms pyrolysis of coal chamber commonly used at present, i.e. moving-bed gasification chamber and bubbling bed vaporizer.In the moving-bed gasification chamber, semicoke returns the combustion chamber and often adopts from stream mode, the residence time of the uncontrollable material of this mode in vaporizer, has influenced the transformation efficiency of carbon; And the material returning device on the regular circulation fluidized-bed combustion boiler is not suitable for herein yet, because the particle diameter of semicoke is much larger than boiler circulating ash particle diameter, flowability also differs widely.Bubbling bed vaporizer can be controlled the returning charge of material easily, but because fluidizing gas velocity is higher than moving-bed, the particle of being carried secretly by elutriation increases greatly, has increased flying dust and has contained carbon loss, has also increased the foreign matter content in the coal gas.Simultaneously, existing fluidized-bed coal gas-steam co-producing technology, the mode that adopts circulating ash all to enter vaporizer makes burning and gasification be difficult to control respectively coal gas and steam productive rate independent regulation difficulty more.
Chinese invention patent 92100912 provides a kind of production method and device of dry distillation gas, and its device mainly comprises circular fluid bed, fluidized bed dryer, dry distiller and material pneumatic conveying system.Circulating ash partly or entirely enters dry distiller, and by the ash amount that the control of ash amount adjustment doors enters dry distiller, this mechanical type ash amount adjustment doors is at high temperature worked, and cost, life-span and reliability are all very undesirable.Circulating ash and coal are sent into two inlets on the dry distiller respectively, are difficult for mixing in dry distiller, have reduced efficiency of carbon conversion.The semicoke and the circulating ash of discharging from the destructive distillation chamber are sent burner hearth by forced air back to pneumatic conveying mode, and required air quantity is big, and the speed height easily causes the burning of semicoke in transfer lime, and bigger to the transfer lime wearing and tearing.
Chinese invention patent 200410070766.3 discloses a kind of coal gas-steam combined production method and a kind of circular fluid bed with the pyrolysis chamber, utilize hot grey divider with the high-temp circulating ash separated into two parts, a part is directly returned the combustion chamber, another part enters the moving bed pyrolysis chamber with coal, pyrolysis after coal and the circulating ash blending, the semicoke of generation returns combustion chambers burn; The gentle control of dividing out of will burning of this method and apparatus can be regulated coal gas and steam productive rate separately.But the two passes pressure reduction that returns burner hearth owing to circulating ash is bigger, and this can bring certain influence to the operation of the grey distribution valve of heat.In addition, the coal that adopts when reality is with the design coal difference when big, and the burning heat release may encounter difficulties the means of existing method shortage adjusting with coupling between the pyrolysis institute heat requirement.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, a kind of solid heat carrier rapid pyrolysis method is provided, this method can realize more stably distributing of coal high-temp circulating ash between burning and pyrolysis loop, and has the system temperature regulating measure, possesses stronger fuel tolerance.
Another object of the present invention provides the solid heat carrier rapid pyrolysis device, can realize more stably distributing of coal high-temp circulating ash between burning and pyrolysis loop, and have the system temperature regulating measure, possesses stronger fuel tolerance.
Technical solution of the present invention is as follows:
A kind of solid heat carrier rapid pyrolysis method, its fuel burns in circulating fluidized bed combustor, high-temp circulating ash in the flue gas that is captured by cyclonic separator is by the hot grey divider separated into two parts of pneumatic control, a part enters the moving bed pyrolysis chamber as solid thermal carriers, for fuel thermal decomposition provides heat, another part high-temp circulating ash does not enter the pyrolysis chamber, returns the combustion chamber with semicoke and the circulating ash that discharge the bottom, pyrolysis chamber through differential bed material-returning device.
Described solid heat carrier rapid pyrolysis method, its described part does not enter the high-temp circulating ash of pyrolysis chamber, after the hot ash cooler of flowing through is emitted heat, returns the combustion chamber with semicoke and the circulating ash that discharge the bottom, pyrolysis chamber through differential bed material-returning device.
The solid heat carrier rapid pyrolysis device that a kind of described method is used comprises hot grey divider, moving bed pyrolysis chamber and the differential bed material-returning device of the circulating fluidized bed combustor that links to each other successively, cyclonic separator, pneumatic control;
Wherein, hot grey divider comprises a feed zone and a returning charge section; This returning charge section communicates with the top, pyrolysis chamber; Differential bed material-returning device feed zone communicates with the bottom, pyrolysis chamber, and differential bed material-returning device returning charge section communicates with the bottom, combustion chamber;
The grey divider of its described heat also comprises another returning charge section, and another returning charge section of hot grey divider is connected with pyrolysis chamber's outlet at bottom.
Described solid heat carrier rapid pyrolysis device, its described solid heat carrier rapid pyrolysis device also comprises a hot ash cooler, on another returning charge section that this hot ash cooler is arranged at hot grey divider and the pipeline section that pyrolysis chamber's outlet at bottom is communicated with.
Solid heat carrier rapid pyrolysis method provided by the present invention and device can be with high-temp circulating ash reliable and stable distribution between burning and pyrolysis loop, pyrolysis chamber's Controllable Temperature; Have hot ash cooler, strengthen the balanced capacity between burning and the pyrolysis, fuel tolerance is good.Method and apparatus of the present invention can be used for the pyrolysis of coal, biomass and other carbonaceous refuse.
Description of drawings
Fig. 1 is the synoptic diagram of the embodiment of the invention 1;
Fig. 2 is the hot grey divider component diagram of the embodiment of the invention;
Fig. 3 is the differential bed material-returning device component diagram of the embodiment of the invention;
Fig. 4 is the synoptic diagram of the embodiment of the invention 2.
Embodiment
Solid heat carrier rapid pyrolysis method provided by the invention is:
Fuel burns in circulating fluidized bed combustor, high-temp circulating ash in the flue gas that is captured by cyclonic separator is by the hot grey divider separated into two parts of pneumatic control, a part enters the moving bed pyrolysis chamber as solid thermal carriers, for fuel thermal decomposition provides heat, another part high-temp circulating ash does not enter the pyrolysis chamber, returns the combustion chamber with semicoke and the circulating ash that discharge the bottom, pyrolysis chamber through differential bed material-returning device;
The high-temp circulating ash that an above-mentioned part does not enter the pyrolysis chamber is flowed through after hot ash cooler emits heat, returns the combustion chamber with semicoke and the circulating ash that discharge the bottom, pyrolysis chamber through differential bed material-returning device.
Please refer to Fig. 1,2 and Fig. 3, solid heat carrier rapid pyrolysis device provided by the invention comprises:
The hot grey divider 3 of the circulating fluidized bed combustor 1 of Xiang Lianing, cyclonic separator 2, pneumatic control, moving bed pyrolysis chamber 4 and differential bed material-returning device 5 successively;
The grey divider 3 of heat comprises a feed zone 31 and two returning charge sections 32,33; Returning charge section 33 communicates with 4 tops, pyrolysis chamber; Another returning charge section 32 of the grey divider 3 of heat is connected with pyrolysis chamber's 4 outlet at bottoms;
Differential bed material-returning device 5 feed zones 51 communicate with 4 bottoms, pyrolysis chamber, and returning charge section 52 communicates with 1 bottom, combustion chamber.
Above-mentioned solid heat carrier rapid pyrolysis device also comprises a hot ash cooler 6, and this hot ash cooler 6 is arranged on hot grey divider 3 returning charge sections 32 and the pipeline section that pyrolysis chamber's 4 outlet at bottoms are communicated with.
Principle of the present invention is:
32,33, one sections of the two returning charge sections of the grey divider 3 of heat are led to 4, one sections of pyrolysis chambers and are directly led to combustion chamber 1 without the pyrolysis chamber, have formed two material circulation loops of burning and pyrolysis.In service, regulate the control air quantity of hot grey divider 3, can regulate the ratio that high-temp circulating ash enters two returning charge sections 32,33, thereby the heat ash is directly returned between the combustion chamber 1 as thermal barrier with without pyrolysis chamber 4 and distributes entering pyrolysis chamber 4; Regulate the control air quantity of differential bed material-returning device 5, can regulate the material of pyrolysis chamber 4 and discharge flow rate, the fuel amount of feeding of pyrolysis chamber 4 can be regulated simultaneously, thus realize to material in the pyrolysis chamber 4 residence time and pyrolysis chamber's 4 temperature controlling.During the low temperature of temperature about 600 ℃ of control pyrolysis chamber 4, the separable tar that goes out higher proportion of the pyrolysis gas of generation is realized pyrolysis oil preparation.
Burning and the parallel connection of two material circulation loops of pyrolysis, before the differential bed material-returning device 5 of combustion chamber 1 loopback material, converging, the operating pressure balance that makes 3 liang of outlets of hot grey divider has guaranteed that hot grey distribution valve has reliable distribution function and good adjusting function.
In order to make system have better fuel tolerance, directly returning in the circulating ash loop of combustion chamber 1 without pyrolysis chamber 4, a hot ash cooler 6 is set.When the change of fuel, the combustion side liberated heat is if surpass the required heat of pyrolysis side, and the working medium in the hot ash cooler 6 can sponge this part heat, reduces the temperature of circulating ash; This part heat can be used for producing hot water or steam.
Circulating fluidized bed combustor 1 can be adiabatic, main production pyrolysis gas and tar; Also can arrange heating surface, produce steam simultaneously, realize steam-coal gas coproduction.
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1, fuel burns in circulating fluidized bed combustor 1, high-temp circulating ash in the flue gas that is captured by cyclonic separator 2 is by hot grey divider 3 separated into two parts of pneumatic control, a part enters moving bed pyrolysis chamber 4 as solid thermal carriers, for the fuel thermal decomposition in the pyrolysis chamber 4 provides heat, pyrolysis gas 4 is drawn from the pyrolysis chamber; Another part circulating ash does not enter pyrolysis chamber 4, returns combustion chamber 1 with semicoke and the circulating ash that discharge 4 bottoms, pyrolysis chamber through differential bed material-returning device 5.
Solid heat carrier rapid pyrolysis device of the present invention comprises: the hot grey divider 3 of the circulating fluidized bed combustor 1 of Xiang Lianing, cyclonic separator 2, pneumatic control, moving bed pyrolysis chamber 4 and differential bed material-returning device 5 successively; The grey divider 3 of heat comprises a feed zone 31 and two returning charge sections 32,33; Returning charge section 33 communicates with 4 tops, pyrolysis chamber, and another returning charge section 32 is connected with pyrolysis chamber's 4 outlet at bottoms; Differential bed material-returning device 5 feed zones 51 communicate with 4 bottoms, pyrolysis chamber, and returning charge section 52 communicates with 1 bottom, combustion chamber.
As shown in Figure 4, embodiment 2 and embodiment 1 different are to have increased a hot ash cooler 6.
Fuel burns in circulating fluidized bed combustor 1, high-temp circulating ash in the flue gas that is captured by cyclonic separator 2 is by hot grey divider 3 separated into two parts of pneumatic control, a part enters moving bed pyrolysis chamber 4 as solid thermal carriers, for fuel thermal decomposition provides heat, another part circulating ash does not enter pyrolysis chamber 4, after hot ash cooler 6 is emitted heat, return combustion chamber 1 through differential bed material-returning device 5 with semicoke and the circulating ash that discharge 4 bottoms, pyrolysis chamber.
Solid heat carrier rapid pyrolysis device provided by the invention comprises: the hot grey divider 3 of the circulating fluidized bed combustor 1 of Xiang Lianing, cyclonic separator 2, pneumatic control, moving bed pyrolysis chamber 4 and differential bed material-returning device 5 successively; The grey divider 3 of heat comprises a feed zone 31 and two returning charge sections 32,33; Returning charge section 33 communicates with 4 tops, pyrolysis chamber, and another returning charge section 32 is connected with pyrolysis chamber's 4 outlet at bottoms; Differential bed material-returning device 5 feed zones 51 communicate with 4 bottoms, pyrolysis chamber, and returning charge section 52 communicates with 1 bottom, combustion chamber; Also comprise a hot ash cooler 6, this hot ash cooler 6 is arranged on hot grey divider 3 returning charge sections 32 and the pipeline section that pyrolysis chamber's 4 outlet at bottoms are communicated with.
Claims (4)
1. solid heat carrier rapid pyrolysis method, it is characterized in that, fuel burns in circulating fluidized bed combustor, high-temp circulating ash in the flue gas that is captured by cyclonic separator is by the hot grey divider separated into two parts of pneumatic control, a part enters the moving bed pyrolysis chamber as solid thermal carriers, for fuel thermal decomposition provides heat, another part high-temp circulating ash does not enter the pyrolysis chamber, returns the combustion chamber with semicoke and the circulating ash that discharge the bottom, pyrolysis chamber through differential bed material-returning device.
2. by the described solid heat carrier rapid pyrolysis method of claim 1, it is characterized in that, a described part does not enter the high-temp circulating ash of pyrolysis chamber, after the hot ash cooler of flowing through is emitted heat, returns the combustion chamber with semicoke and the circulating ash that discharge the bottom, pyrolysis chamber through differential bed material-returning device.
3. the solid heat carrier rapid pyrolysis device that uses of the method for claim 1 comprises hot grey divider, moving bed pyrolysis chamber and the differential bed material-returning device of the circulating fluidized bed combustor that links to each other successively, cyclonic separator, pneumatic control;
Wherein, hot grey divider comprises a feed zone and a returning charge section; This returning charge section communicates with the top, pyrolysis chamber; Differential bed material-returning device feed zone communicates with the bottom, pyrolysis chamber, and differential bed material-returning device returning charge section communicates with the bottom, combustion chamber;
It is characterized in that: the grey divider of described heat also comprises another returning charge section, and another returning charge section of hot grey divider is connected with pyrolysis chamber's outlet at bottom.
4. solid heat carrier rapid pyrolysis device as claimed in claim 3, it is characterized in that, described solid heat carrier rapid pyrolysis device also comprises a hot ash cooler, on another returning charge section that this hot ash cooler is arranged at hot grey divider and the pipeline section that pyrolysis chamber's outlet at bottom is communicated with.
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| CN2007101194767A CN101353582B (en) | 2007-07-25 | 2007-07-25 | Solid heat carrier rapid pyrolysis method and apparatus |
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| CN101353582B true CN101353582B (en) | 2010-12-01 |
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| US9347005B2 (en) | 2011-09-13 | 2016-05-24 | Ensyn Renewables, Inc. | Methods and apparatuses for rapid thermal processing of carbonaceous material |
| US9410091B2 (en) | 2011-12-12 | 2016-08-09 | Ensyn Renewables, Inc. | Preparing a fuel from liquid biomass |
| US9422478B2 (en) | 2010-07-15 | 2016-08-23 | Ensyn Renewables, Inc. | Char-handling processes in a pyrolysis system |
| US9441887B2 (en) | 2011-02-22 | 2016-09-13 | Ensyn Renewables, Inc. | Heat removal and recovery in biomass pyrolysis |
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| US9422478B2 (en) | 2010-07-15 | 2016-08-23 | Ensyn Renewables, Inc. | Char-handling processes in a pyrolysis system |
| US9441887B2 (en) | 2011-02-22 | 2016-09-13 | Ensyn Renewables, Inc. | Heat removal and recovery in biomass pyrolysis |
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