CN102585857B - Lignite drying and pyrolyzing device - Google Patents
Lignite drying and pyrolyzing device Download PDFInfo
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- CN102585857B CN102585857B CN2012100695181A CN201210069518A CN102585857B CN 102585857 B CN102585857 B CN 102585857B CN 2012100695181 A CN2012100695181 A CN 2012100695181A CN 201210069518 A CN201210069518 A CN 201210069518A CN 102585857 B CN102585857 B CN 102585857B
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Abstract
The invention discloses a lignite drying and pyrolyzing device. The device comprises a drying fluidized bed barrel and a pyrolyzing fluidized bed barrel, wherein a coal falling pipe is arranged at the bottom of the drying fluidized bed barrel and communicated with a material returning mechanism; the material returning mechanism is communicated with the pyrolyzing fluidized bed barrel through a transmission pipe; at least one stage of cyclone separator is arranged in the pyrolyzing fluidized bed barrel; the outlet of the last stage of cyclone separator is communicated with a coal gas outlet pipe of the pyrolyzing fluidized bed barrel; the coal gas outlet pipe is communicated with a first electrical tar precipitator; the first electrical tar precipitator is communicated with a primary condenser; and the primary condenser is communicated with the bottom of the drying fluidized bed barrel through a first fan. By the device, the phenomenon that a pipe is blocked in the process of discharging tar is avoided, a heat source can be recycled, the utilization efficiency of heat energy is improved, energy consumption in the process of pyrolyzing coal is reduced, and the production cost of pyrolyzing the coal is reduced.
Description
Technical field
The present invention relates to the pyrolysis of coal field, relate in particular to a kind of brown coal drying pyrolysis installation.
Background technology
Coal is as a kind of important energy source, generally need to carry out corresponding conversion to coal in the prior art improved afterwards to its utilising efficiency, wherein pyrolytic process of coal is the important process of coal conversion, under relative temperature and condition with coal in hydrogen-rich component extract with liquids and gases, multiple condensed ring compound fragrant hydrocarbon and the heterogeneous ring compound that can also obtain simultaneously benzene, naphthalene, anthracene, phenanthrene and there is no at present the method synthetic, improved the utilization ratio of coal.Can produce a large amount of tar in the pyrolysis of coal process,, along with temperature reduces progressively condensation of tar gradually, even be set on delivery line in the process that tar is derived, accumulation can cause delivery line to stop up gradually, cause potential safety hazard, reduce the stability of pyrolysis of coal process.The high-temperature gas that in prior art, pyrolysis of coal produces later after absorption, directly is discharged in the external world, wastes a large amount of heat energy, reduces the utilising efficiency of heat energy.And need to need to additionally heat to avoid the condensation of heavy tar this separator at reactor outer setting High Temperature Gas solid separator in actual production process, increase production cost, take up room larger.
This shows, prior art awaits with further improving and developing.
Summary of the invention
The present invention provides a kind of brown coal drying pyrolysis installation for solving above-mentioned defect of the prior art,, to improve utilization efficiency of heat energy, avoids the plugging phenomenon occurring in derivation tar process.
For solving the problems of the technologies described above, the present invention program comprises:
A kind of brown coal drying pyrolysis installation, it comprises drying fluidized-bed cylindrical shell and pyrolysis fluidized-bed cylindrical shell, and wherein, the bottom of drying fluidized-bed cylindrical shell arranges fuel dropping pipe, this fuel dropping pipe is connected with a returning charge mechanism, and this returning charge mechanism is connected with pyrolysis fluidized-bed cylindrical shell by a transfer tube; Be provided with primary cyclone at least in this pyrolysis fluidized-bed cylindrical shell, the outlet of last step cyclonic separator is connected with the gas outlet tube of pyrolysis fluidized-bed cylindrical shell, this gas outlet tube is connected with the first electrical tar precipitator, this first electric fishing is caught the tar device and is connected with a primary condenser, and this primary condenser is connected with the drying fluidized-bed cylinder body bottom by the first blower fan; Enter in pyrolysis fluidized-bed cylindrical shell through fuel dropping pipe, returning charge mechanism successively after brown coal drying fluidized-bed cylindrical shell drying, carry out pyrolysis in pyrolysis fluidized-bed cylindrical shell, the gas of its generation enters primary condenser by cyclonic separator, primary condenser is controlled at this gas temperature between 300 ℃-500 degrees centigrade, and then self-desiccation fluidized-bed cylinder body bottom enters in the drying fluidized-bed cylindrical shell.
Described brown coal drying pyrolysis installation, wherein, above-mentioned cyclonic separator is positioned at the top of pyrolysis fluidized-bed cylindrical shell, is provided with the collection tube of arranging along fluidized-bed cylindrical shell length direction on cyclonic separator, and the collection tube end is provided with a kink.
Described brown coal drying pyrolysis installation, wherein, be provided with the first air distribution plate of a lateral arrangement in above-mentioned pyrolysis fluidized-bed cylindrical shell, this air distribution plate and fluidized-bed cylindrical shell form an inlet plenum; Be provided with burnt pipe on this air distribution plate, the end of this burnt pipe that falls passes inlet plenum, is positioned on the burnt pipe of falling of inlet plenum outside and is provided with a control valve.
Described brown coal drying pyrolysis installation, wherein, be provided with two-stage or three-stage cyclone separator in above-mentioned pyrolysis fluidized-bed, is connected by pipeline between adjacent cyclonic separator.
Described brown coal drying pyrolysis installation, wherein, the angle of above-mentioned kink and collection tube end is between 120 °-160 °.
Described brown coal drying pyrolysis installation, wherein, above-mentioned drying fluidized-bed top is provided with escape pipe, and this escape pipe is connected with the second cyclonic separator, this second cyclonic separator is caught the tar device with the second electric fishing and is connected, and this second electric fishing is caught the tar device and is connected with the second condenser; Above-mentioned drying fluidized-bed cylindrical shell is provided with for the coal chute that imports brown coal.
Described brown coal drying pyrolysis installation, wherein, above-mentioned drying fluidized-bed cylindrical shell bottom is provided with the second air distribution plate of lateral arrangement, and fuel dropping pipe upwards passes the second air distribution plate, reveals and puts above the second air distribution plate.
Described brown coal drying pyrolysis installation, wherein, above-mentioned returning charge mechanism is provided with supply air line, is provided with to control the returning charge structure on this supply air line and enters the loosening air-valve of adjusting and the returning charge air-valve of pyrolysis fluidized-bed cylindrical shell coal amount.
Described brown coal drying pyrolysis installation, wherein, above-mentioned pyrolysis fluidized-bed cylindrical shell bottom is provided be used to the transfer line that 600 ℃ of-1200 ℃ of rare gas elementes are provided, and is provided with the second blower fan on this transfer line.
Described brown coal drying pyrolysis installation, wherein, above-mentioned rare gas element is stack gas, combustion product gases, carbon dioxide, nitrogen or its mixed gas.
A kind of brown coal drying pyrolysis installation provided by the invention, frame mode by drying fluidized-bed cylindrical shell and pyrolysis fluidized-bed cylindrical shell, take full advantage of the heat energy in pyrolysis fluidized-bed cylindrical shell, and tar can be derived reactor smoothly, cyclonic separator is at high temperature removed the dust that carries in coal gas and tar steam, avoided the plugging phenomenon occurring in derivation tar process, the present invention can the recycle thermal source, improved utilization efficiency of heat energy, reduce the energy consumption in the pyrolysis of coal process, reduced the production cost of pyrolysis of coal.
Description of drawings
Fig. 1 is the structural representation of brown coal drying pyrolysis installation in the present invention.
Embodiment
The invention provides a kind of brown coal drying pyrolysis installation, clearer, clear and definite in order to make purpose of the present invention, technical scheme and advantage, below with reference to accompanying drawing and embodiment, the present invention is described in more detail.
The invention provides a kind of brown coal drying pyrolysis installation, as shown in Figure 1, the brown coal drying pyrolysis installation comprises drying fluidized-bed cylindrical shell 1 and pyrolysis fluidized-bed cylindrical shell 2, and drying fluidized-bed cylindrical shell 1 can adopt technique means well known in the prior art with pyrolysis fluidized-bed cylindrical shell 2.The bottom of drying fluidized-bed cylindrical shell 1 arranges fuel dropping pipe 3, and this fuel dropping pipe 3 is connected with a returning charge mechanism 4, and this returning charge mechanism 4 is connected with pyrolysis fluidized-bed cylindrical shell 2 by a transfer tube 5; Be provided with primary cyclone 6 at least in this pyrolysis fluidized-bed cylindrical shell 2, the outlet of last step cyclonic separator 6 is connected with the gas outlet tube 7 of pyrolysis fluidized-bed cylindrical shell 2, this gas outlet tube 7 is connected with the first electrical tar precipitator 8, this first electric fishing is caught tar device 8 and is connected with a primary condenser 9, and this primary condenser 9 is connected with drying fluidized-bed cylindrical shell 1 bottom by the first blower fan 10; Enter in pyrolysis fluidized-bed cylindrical shell 2 through fuel dropping pipe 3, returning charge mechanism 4 successively after brown coal drying fluidized-bed cylindrical shell 1 drying, carry out pyrolysis in pyrolysis fluidized-bed cylindrical shell 2, the gas of its generation enters primary condenser 9 by cyclonic separator 6, primary condenser 9 is controlled at this gas temperature between 300 ℃-500 degrees centigrade, then self-desiccation fluidized-bed cylindrical shell 1 bottom enters in drying fluidized-bed cylindrical shell 1, brown coal in drying fluidized-bed cylindrical shell 1 are carried out drying, the recycle thermal source, improved the utilising efficiency of heat energy.
In another preferred embodiment of the present invention, cyclonic separator 6 is positioned at the top of pyrolysis fluidized-bed cylindrical shell 2, be provided with the collection tube 12 of arranging along pyrolysis fluidized-bed cylindrical shell 2 length directions on cyclonic separator 6, collection tube 12 ends are provided with a kink 13, thereby avoided collection tube 12 straight up and down to import the situation of coal particle, and the length of collection tube 12 is to be determined by bed thickness and the bed of material pressure drop of pyrolysis fluidized-bed cylindrical shell 2.Obvious cyclonic separator 2 can also be arranged on the correct position of pyrolysis fluidized-bed cylindrical shell 2 as required, especially be provided with a gas outlet tube 7 on pyrolysis fluidized-bed cylindrical shell 2, cyclonic separator 6 all is connected with gas outlet tube 7, thereby the coal gas that pyrolysis of coal produces is derived, improved derivation efficiency.
In another preferred embodiment, be provided with the first air distribution plate 14 of a lateral arrangement in pyrolysis fluidized-bed cylindrical shell 2, this air distribution plate 14 forms an inlet plenum 15 with pyrolysis fluidized-bed cylindrical shell 2; Be provided with burnt pipe 16 on this air distribution plate 14, this end that falls burnt pipe 16 passes inlet plenum 15, is positioned on the burnt pipe 16 of falling of inlet plenum 15 outsides and is provided with a control valve 17, controls burnt speed.
Further, in the pyrolysis fluidized-bed, 2 are provided with two-stage or three-stage cyclone separator 6, are connected by pipeline between adjacent cyclonic separator 6, have improved and have removed the efficiency of carrying dust in coal gas and tar steam.
Further, the angle of kink 13 and collection tube 12 ends between 120 °-160 °, is conducive to dust granules and falls into smoothly in the bed of material of pyrolysis fluidized-bed cylindrical shell 2 from collection tube 12.
In another preferred embodiment of the present invention, on the drying fluidized-bed cylindrical shell, 1 one is provided with escape pipe 18, this escape pipe 18 is connected with the second cyclonic separator 19, this second cyclonic separator 19 is caught tar device 20 with the second electric fishing and is connected, and this second electric fishing is caught tar device 20 and is connected with the second condenser 27; And drying fluidized-bed cylindrical shell 1 is provided with for the coal chute 21 that imports brown coal, thereby the coal raw material is entered in drying fluidized-bed cylindrical shell 1 smoothly.
Further, drying fluidized-bed cylindrical shell 1 bottom is provided with the second air distribution plate 22 of lateral arrangement, and fuel dropping pipe 3 upwards passes the second air distribution plate 22, reveals and puts above the second air distribution plate 22.
In another preferred embodiment of the present invention, returning charge mechanism 4 is provided with supply air line 23, be provided with to control the returning charge structure on this supply air line 23 and enter the loosening air-valve 24 of adjusting and returning charge air-valve 25 of pyrolysis fluidized-bed cylindrical shell 2 coal amounts, improved the stability of the present invention's operation.
Further, pyrolysis fluidized-bed cylindrical shell 2 bottoms are provided be used to the transfer line 28 that 600 ℃ of-1200 ℃ of rare gas elementes are provided, and are provided with the second blower fan 26 on this transfer line 28, have improved the fluency to pyrolysis fluidized-bed cylindrical shell 1 air feed.And rare gas element is stack gas, combustion product gases, carbon dioxide, nitrogen or its mixed gas, has improved the efficiency of pyrolysis of coal, has avoided simultaneously the aggegation in collection tube 3 of high temperature tar and dust.
pass through fuel dropping pipe 3 through dried brown coal, returning charge mechanism 4 enters in pyrolysis fluidized-bed cylindrical shell 2 with transfer tube 5, carry out pyrolysis, at this moment, it is the rare gas element of 600 ℃-1200 ℃ that transfer line 28 provides temperature to pyrolysis fluidized-bed cylindrical shell 2, brown coal pyrolysis under hot conditions, coal gas after pyrolysis enters gas outlet tube 7 after cyclonic separator 6 is processed, then entering the first electrical tar precipitator 8 processes, obtain a large amount of tar and discharge by the first electrical tar precipitator 8, and gas enters in a primary condenser 9 again, between primary condenser 9 is controlled 300 ℃-500 ℃ with the temperature of gas, and remaining tar in Exhaust Gas, then temperature is that gas first blower fan 10 of 300 ℃-500 ℃ enters drying fluidized-bed cylindrical shell 1 bottom, realized the recycle to heat energy.
Embodiment 1:
be 42wt% with water content, the brown coal of particle diameter＜25mm, join continuously in drying fluidized-bed cylindrical shell 1 and carry out drying with the inlet amount of 1 ton/hour, through dried brown coal water content be down to＜2%, it is by fuel dropping pipe 3, returning charge mechanism 4 enters in pyrolysis fluidized-bed cylindrical shell 2 continuously with transfer tube 5, transfer line 28 passes into the combustion product gases of 850 ℃ with the flow of 1800 cubes m/hs (standard state) in pyrolysis fluidized-bed cylindrical shell 2, make the Rapid-pyrolysis in pyrolysis fluidized-bed cylindrical shell 2, pyrolysis gas-phase product tar steam and coal gas enter gas outlet tube 7 after processing by cyclonic separator 6 along with combustion product gases, obtain a large amount of tar and discharge by the first electrical tar precipitator 8 again, and gas enters in a primary condenser 9 again, between primary condenser 9 is controlled 350 ℃-450 ℃ with the temperature of gas, gas enters in drying fluidized-bed cylindrical shell 1 and carries out drying operation afterwards, the second electrical tar precipitator 20 and the second condenser 27 obtain respectively a small amount of tar and a large amount of water of condensation.Dust content in the product tar that obtains from electrical tar precipitator 8, condenser 9 and electrical tar precipitator 20 is less than 0.5wt%, approximately 310 kg/hours of the product semicoke amounts of discharging from control valve 17, and approximately 80 ℃ of the exhaust temperatures that the second condenser 27 is discharged, can directly enter hearth combustion, produce combustion product gases,, for pyrolysis fluidized-bed cylindrical shell 2, further improved the utilization ratio to the energy again.
Embodiment 2:
be 35wt% with water content, the brown coal of particle diameter＜30mm, join continuously in drying fluidized-bed cylindrical shell 1 and carry out drying with the inlet amounies of 2 tons/hour, through dried brown coal water content be down to＜2.8%, it is by fuel dropping pipe 3, returning charge mechanism 4 enters in pyrolysis fluidized-bed cylindrical shell 2 continuously with transfer tube 5, transfer line 28 passes into the combustion product gases of 850 ℃ with the flow of 3000 cubes m/hs (standard state) in pyrolysis fluidized-bed cylindrical shell 2, make the Rapid-pyrolysis in pyrolysis fluidized-bed cylindrical shell 2, pyrolysis gas-phase product tar steam and coal gas enter gas outlet tube 7 after processing by cyclonic separator 6 along with combustion product gases, obtain a large amount of tar and discharge by the first electrical tar precipitator 8 again, and gas enters in a primary condenser 9 again, between primary condenser 9 is controlled 350 ℃-450 ℃ with the temperature of gas, gas enters in drying fluidized-bed cylindrical shell 1 and carries out drying operation afterwards, the second electrical tar precipitator 20 and the second condenser 27 obtain respectively a small amount of tar and a large amount of water of condensation.Dust content in the product tar that obtains from electrical tar precipitator 8, condenser 9 and electrical tar precipitator 20 is less than 0.7wt%, approximately 750 kg/hours of the product semicoke amounts of discharging from control valve 17, and approximately 80 ℃ of the exhaust temperatures that the second condenser 27 is discharged, can directly enter hearth combustion, produce combustion product gases,, for pyrolysis fluidized-bed cylindrical shell 2, improved energy utilization rate again.
Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention also is not limited in above-mentioned giving an example, and those skilled in the art make in essential scope of the present invention variation, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (4)
1. brown coal drying pyrolysis installation, it comprises drying fluidized-bed cylindrical shell and pyrolysis fluidized-bed cylindrical shell, it is characterized in that: the bottom of drying fluidized-bed cylindrical shell arranges fuel dropping pipe, and this fuel dropping pipe is connected with a returning charge mechanism, and this returning charge mechanism is connected with pyrolysis fluidized-bed cylindrical shell by a transfer tube; Be provided with primary cyclone at least in this pyrolysis fluidized-bed cylindrical shell, the outlet of last step cyclonic separator is connected with the gas outlet tube of pyrolysis fluidized-bed cylindrical shell, this gas outlet tube is connected with the first electrical tar precipitator, this first electric fishing is caught the tar device and is connected with a primary condenser, and this primary condenser is connected with the drying fluidized-bed cylinder body bottom by the first blower fan; Enter in pyrolysis fluidized-bed cylindrical shell through fuel dropping pipe, returning charge mechanism successively after brown coal drying fluidized-bed cylindrical shell drying, carry out pyrolysis in pyrolysis fluidized-bed cylindrical shell, the gas of its generation enters primary condenser by cyclonic separator, primary condenser is controlled at this gas temperature between 300 ℃-500 degrees centigrade, and then self-desiccation fluidized-bed cylinder body bottom enters in the drying fluidized-bed cylindrical shell;
Above-mentioned cyclonic separator is positioned at the top of pyrolysis fluidized-bed cylindrical shell, is provided with the collection tube of arranging along fluidized-bed cylindrical shell length direction on cyclonic separator, and the collection tube end is provided with a kink;
Be provided with the first air distribution plate of a lateral arrangement in above-mentioned pyrolysis fluidized-bed cylindrical shell, this air distribution plate and pyrolysis fluidized-bed cylindrical shell form an inlet plenum; Be provided with burnt pipe on this air distribution plate, the end of this burnt pipe that falls passes inlet plenum, is positioned on the burnt pipe of falling of inlet plenum outside and is provided with a control valve;
The angle of above-mentioned kink and collection tube end is between 120 °-160 °;
Above-mentioned drying fluidized-bed cylindrical shell bottom is provided with the second air distribution plate of lateral arrangement, and fuel dropping pipe upwards passes the second air distribution plate, reveals and puts above the second air distribution plate;
Above-mentioned returning charge mechanism is provided with supply air line, is provided with to control the returning charge structure on this supply air line and enters the loosening air-valve of adjusting and the returning charge air-valve of pyrolysis fluidized-bed cylindrical shell coal amount;
Above-mentioned pyrolysis fluidized-bed cylindrical shell bottom is provided be used to the transfer line that 600 ℃ of-1200 ℃ of rare gas elementes are provided, and is provided with the second blower fan on this transfer line.
2. brown coal drying pyrolysis installation according to claim 1, is characterized in that: be provided with two-stage or three-stage cyclone separator in above-mentioned pyrolysis fluidized-bed, be connected by pipeline between adjacent cyclonic separator.
3. brown coal drying pyrolysis installation according to claim 1, it is characterized in that: above-mentioned drying fluidized-bed top is provided with escape pipe, this escape pipe is connected with the second cyclonic separator, this second cyclonic separator is caught the tar device with the second electric fishing and is connected, and this second electric fishing is caught the tar device and is connected with the second condenser; Above-mentioned drying fluidized-bed cylindrical shell is provided with for the coal chute that imports brown coal.
4. brown coal drying pyrolysis installation according to claim 1, it is characterized in that: above-mentioned rare gas element is stack gas, combustion product gases, carbon dioxide, nitrogen or its mixed gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100695181A CN102585857B (en) | 2012-03-16 | 2012-03-16 | Lignite drying and pyrolyzing device |
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| CN2012100695181A CN102585857B (en) | 2012-03-16 | 2012-03-16 | Lignite drying and pyrolyzing device |
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| CN102585857A CN102585857A (en) | 2012-07-18 |
| CN102585857B true CN102585857B (en) | 2013-11-20 |
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| CN103666506A (en) * | 2013-12-13 | 2014-03-26 | 北京蓝天利源科技有限公司 | Feed coal pre-pyrolysis device for large-sized pulverized coal furnace |
| CN107057734A (en) * | 2017-02-27 | 2017-08-18 | 陈铭鸿 | A kind of brown coal drying pyrolysis installation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429463A (en) * | 2007-11-06 | 2009-05-13 | 湖南大唐先一科技有限公司 | Process for processing coal with low degree of metamorphism |
| CN101657526A (en) * | 2006-12-01 | 2010-02-24 | 埃克森美孚研究工程公司 | Improved fluidized coking process |
| CN101701158A (en) * | 2009-11-06 | 2010-05-05 | 湖南大唐先一科技有限公司 | Process for upgrading low-rank coal in an internally heating way with heated gas carrier |
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2012
- 2012-03-16 CN CN2012100695181A patent/CN102585857B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101657526A (en) * | 2006-12-01 | 2010-02-24 | 埃克森美孚研究工程公司 | Improved fluidized coking process |
| CN101429463A (en) * | 2007-11-06 | 2009-05-13 | 湖南大唐先一科技有限公司 | Process for processing coal with low degree of metamorphism |
| CN101701158A (en) * | 2009-11-06 | 2010-05-05 | 湖南大唐先一科技有限公司 | Process for upgrading low-rank coal in an internally heating way with heated gas carrier |
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