CN101818092B - Integrated fluidized bed mild-gasification lignite upgrading system and technology - Google Patents
Integrated fluidized bed mild-gasification lignite upgrading system and technology Download PDFInfo
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- CN101818092B CN101818092B CN2009102191271A CN200910219127A CN101818092B CN 101818092 B CN101818092 B CN 101818092B CN 2009102191271 A CN2009102191271 A CN 2009102191271A CN 200910219127 A CN200910219127 A CN 200910219127A CN 101818092 B CN101818092 B CN 101818092B
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Abstract
The invention discloses an integrated fluidized bed mild-gasification lignite upgrading system and integrated fluidized bed mild-gasification lignite upgrading technology. The lignite is subjected to pre-drying treatment by using high temperature air generated by a low-value gas-fired incinerator so as to remove part of moisture in the lignite; the lignite is delivered to a fluidized bed mild-gasification lignite upgrading reactor for partial gasification, destructive distillation and combustion reaction, wherein one part of heat generated in the reaction is used for maintaining the temperature in the reactor and the other part of heat is used for removing the moisture in the lignite; and the lignite upgraded by the fluidized bed mild-gasification lignite upgrading reactor is delivered to a finished product cooler for cooling and then delivered to a finished product warehouse, and the generated low-value gas is fed to a subsequent low-value gas-fired incinerator for burning. The system and the technology have the characteristics of simple process, convenient operation, low energy consumption, less pollutant discharge, and no waste water discharge.
Description
Technical field
The present invention relates to a kind of dry materials upgrading system and technology, particularly a kind of integrated fluidized bed mild-gasification brown coal upgrading system and technology.
Background technology
Brown coal are the lower common coals of a kind of degree of coalification, are by peat deposition after dehydration, compacting change the initial stage product of organic-biological rock into, because of appearance is brown or dun is gained the name.The most of tarnishes of brown coal, true density is at 1.10～1.40g/cm
3Between, moisture is up to 30～60%, and volatile matter is high, and burning-point is low, and is non-caked, and easy-weathering is rotten, contains original humic acid, contains the oxygen height, and chemical reactivity is strong, and poor heat stability is a kind of inflammable fossil oil.Original humic acid is the principal character component that brown coal are different from other coal.
The explored brown coal reserves of China reach 1,300 hundred million t, account for about 13% of national coal total reserves.It is domestic that the lignite resource of China mainly is distributed in Yunnan Province of east, Inner Mongolia Autonomous Region and southwest.
See from the formation epoch of Chinese brown coal; The ratio of brown coal reserves is maximum with jurassic period in secondary era (apart from 1.44 hundred million the presents of modern about 2.05 hundred million～distance); Account for 4/5 of national brown coal reserves, mainly be distributed in the east three alliances area that east Inner Mongolia and three provinces in the northeast of China closely link to each other.The tertiary period in the Cenozoic (apart from modern 6,500 ten thousand～apart from modern 1,800,000 years) lignite resource accounts for about 1/5 of national brown coal reserves, it is domestic mainly to be distributed in Yunnan Province.In addition, also there are brown coal in a small amount of tertiary period in provinces such as Sichuan, Guangdong, Guangxi, Hainan, and it is domestic that the brown coal in the tertiary period of East China mainly are distributed in the Shandong Province, and also there are part brown coal in the tertiary period three provinces in the northeast of China.In jurassic period brown coal little morning, middle jurassic period brown coal; Generally be late jurassic period brown coal; Perhaps be called old brown coal; Mainly be distributed in basin, Huo Lin river, coal province, Hailaer, east, China Inner Mongolia Autonomous Region and Heilungkiang San Jiang-coal province, Mu Lin river, this area is the area of concentration of China's lignite resource.
Inner Mongolia Autonomous Region is the province that China's brown coal reserves account for absolute majority, accounts for more than 3/4 of national lignite resource.Some maximum brown coal coalfields of China's reserves nearly all concentrate on the border region of east Inner Mongolia near three provinces in the northeast of China; Wherein exploitation early coalfields such as the grant of bundle Nore, first Golconda, the flat village are arranged; Huo Linhe, Yi Min and wild goose coalfield are arranged subsequently, the reserves in these coalfields all at tens tons to the over ten billion ton.
Along with world's high-quality coal resource is fewer and feweri, face cost increases day by day, many country beginnings or pay attention to the abundant lignite resource of exploitation more.Brown coal are compared with other coals, and oxygen level is high, ash content and ash fusion point changes greatly, little, the easy spontaneous combustion of density, coal dust are exploded easily.Brown coal directly utilize and have problems, and higher moisture content in the brown coal has increased the transportation cost of brown coal, has limited brown coal by the transportation of mining area to regional user far away.Brown coal belong to the coal of very easily spontaneous combustion, therefore in the long-distance transportation process, also can bring the problem of spontaneous combustion and blast.
Brown coal upgrading technology is in experimental study and through engineering approaches initial application stage at present, and also there is obvious defects in various brown coal upgrading technology when having intrinsic advantage.Major part technical matters system is very complicated, and the brown coal upgrading is with high costs, and system's serviceability is low, and environment is had bigger pollution etc., uses from real heavy industrialization to also have the distance of quite growing.
After brown coal dehydrations and the upgrading processing, its composition and character level off to bituminous coal, will more help utilizing, transport and storage.The a large amount of designs of China's active service use the unit of bituminous coal, because coal source situation changes, supply of fuel is nervous, and cost is not according to height not down.If the fuel that can utilize the brown coal upgrading to process is not carrying out under the situation of big technological transformation former boiler unit; Directly mix to burn and use; Can effectively utilize lignite resource, significantly improve the utility value of brown coal, be of great practical significance and good and economic.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of integrated fluidized bed mild-gasification brown coal upgrading system and technology, have the advantages that technology is simple, easy to operate, energy consumption is low, water consumption is few, can satisfy the maximization production requirement.
To achieve these goals, the technical solution of the present invention's employing is:
Integrated fluidized bed mild-gasification brown coal upgrading system; Comprise a crushing and screening system 1; The material outlet end of crushing and screening system 1 links to each other with the feed inlet end of predrying device run coal bin 2 with low value gas-fired incinerator run coal bin 20; The discharge port end of predrying device run coal bin 2 is connected with the feed inlet end of feeding machine 3, and the discharge port end of feeding machine 3 is connected with the feeding mouth end of predrying device 4, and the air opening end of fan 6 is connected with the blast inlet end of low value gas-fired incinerator air preheater 5; The air opening end of low value gas-fired incinerator air preheater 5 is connected with the blast inlet end of predrying device 4; The air opening end of predrying device 4 is connected with the inlet end of cyclonic separator 7, and the air opening end of cyclonic separator 7 is connected with the inlet end of fly-ash separator 8, and the discharge port end of cyclonic separator 7 is connected with the feed inlet end in work in-process storehouse 10; The exit end of fly-ash separator 8 is connected with the inlet end of induced draft fan 9, and the material outlet end of fly-ash separator 8 is connected with the feed inlet end in work in-process storehouse 10.
Integrated fluidized bed mild-gasification brown coal upgrading system; The discharge port end in its work in-process storehouse 10 is connected with the feed inlet end of feeding machine 11; The discharge port end of feeding machine 11 is connected with the feed inlet end of fluidized bed mild-gasification brown coal upgrading reactor drum 12; The coarse particles finished product discharge port end of fluidized bed mild-gasification brown coal upgrading reactor drum 12 is connected with the feed inlet end of coarse particles finished product water cooler 13, and the discharge port end of coarse particles finished product water cooler 13 is connected with the feed inlet end of coarse particles finished bin 14; The smoke outlet of fluidized bed mild-gasification brown coal upgrading reactor drum 12 is connected with the gas approach end of cyclonic separator 19; The air opening end of cyclonic separator 19 is connected with the low value fuel gas inlet end of low value gas-fired incinerator 22; The discharge port end of cyclonic separator 19 is connected with the feeding mouth end of fine particle finished product water cooler 18, and the discharge port end of fine particle finished product water cooler 18 is connected with the feed inlet end of fine particle finished bin 17; The air opening end of fan 16 is connected with the blast inlet end of low value gas-fired incinerator air preheater 15, and the air opening end of low value gas-fired incinerator air preheater 15 is connected with the air compartment of fluidized bed mild-gasification brown coal upgrading reactor drum 12.
Integrated fluidized bed mild-gasification brown coal upgrading system; The discharge port end of its run coal bin 20 is connected with the feed inlet end of feeding machine 21; The discharge port end of feeding machine 21 is connected with the feed inlet end of low value gas-fired incinerator 22; The smoke outlet of low value gas-fired incinerator 22 is connected with the entrance end of cyclonic separator 24, and the air opening end of cyclonic separator 24 is connected with the entrance end of back-end ductwork 32, and the exit end of back-end ductwork 32 is connected with the entrance end of fly-ash separator 29; The exit end of fly-ash separator 29 is connected with the entrance end of induced draft fan 30, and the exit end of induced draft fan 30 is connected with the entrance end of chimney 31; The slag notch end of low value gas-fired incinerator 22 is connected with the entrance end of slag cooler 25; The air opening end of fan 27 is connected with the blast inlet end of the air preheater 26 of low value gas-fired incinerator 22, and the exit end of air preheater 26 is connected with the air compartment of low value gas-fired incinerator 22; The discharge port end of limestone system 23 is connected with the material returning device inclined tube of low value gas-fired incinerator 22; The air outlet of roots blower 28 is connected with the material returning device bottom air compartment of low value gas-fired incinerator 22.
Integrated fluidized bed mild-gasification brown coal process for upgrading; Behind the particle that brown coal process crushing and screening system 1 is crushed to less than the 50mm granularity, deliver into run coal bin 2 and run coal bin 20, brown coal get into predrying device 4 from the discharge port of run coal bin 2 by feeding machine 3 controls; High temperature air is through after the predrying device 4; Temperature drops to below 100 ℃, after cyclonic separator 7 separation through afterbody, sends into fly-ash separator 8; After fly-ash separator 8 is most of solid removal,, send into work in-process storehouse 10 by the fine powder that cyclonic separator 7 and fly-ash separator 8 capture directly by induced draft fan 9 emptyings; Predrying coal in the work in-process storehouse 10 feeds fluidized bed mild-gasification brown coal upgrading reactor drum 12 via feeding machine 11 and carries out degree of depth upgrading; Predrying coal in fluidized bed mild-gasification brown coal upgrading reactor drum 12 after the warm air fluidisation; Mild-gasification, burning, dry distillation reactor take place in fluidized bed mild-gasification brown coal upgrading reactor drum 12; Whole moisture in the brown coal are released in the flue gas, and the heat that the chemical reaction that the temperature of fluidized bed mild-gasification brown coal upgrading reactor drum 12 is taken place by brown coal produces is kept.
Through degree of depth upgrading; Can produce the upgrading brown coal of two kinds of different-grain diameters; Be coarse particles finished product and fine particle finished product; Wherein the coarse particles finished product enters coarse particles finished product water cooler 13 by the discharge gate of fluidized bed mild-gasification brown coal upgrading reactor drum 12 bottoms, sends into coarse particles finished bin 14 through being cooled to after temperature is lower than 75 ℃; After a part of fine particle finished product that flue gas carries separates via cyclonic separator 19, most ofly separatedly gets off, enter fine particle finished product water cooler 18, send into fine particle finished bin 17 after temperature is lower than 75 ℃ through being cooled to by the discharge gate of cyclonic separator 19 bottoms.
The 22 burning utilizations of low value gas-fired incinerator are sent in low value combustion gas by fluidized bed mild-gasification brown coal upgrading reactor drum 12 is discharged after cyclonic separator 19 is removed most of coal dust; Low value gas-fired incinerator 22 is a burner hearth adiabatic circular fluid bed, realizes the abundant burning of low value combustion gas and reduces pollutent (SO through afterburning part solid fuel and interpolation Wingdale
2) discharging; The high-temperature flue gas that low value burning incinerator 22 produces is via being arranged in air preheater 5,15, the 26 heat exchange coolings in the back-end ductwork 32 after after fly-ash separator 29 discharges, send into chimney 31 emptyings by induced draft fan 30; Cold wind is admitted to be delivered to predrying device 4, fluidized bed mild-gasification brown coal upgrading reactor drum 12 and low value gas-fired incinerator 22 and utilizes after air preheater 5,15,26 heat exchange heat up.
Fluidizing velocity in the predrying device 4 is controlled between 1.0～6.0m/s, and temperature is controlled between 20～90 ℃.
Fluidizing velocity in the fluidized bed mild-gasification brown coal upgrading reactor drum 12 is controlled between 1.0～6.0m/s, and the temperature of main reaction region is controlled between 300 ℃～700 ℃.Through the brown coal of upgrading, its moisture finally can control to＜and 10%.
Description of drawings
Accompanying drawing is a system architecture synoptic diagram of the present invention.
Embodiment
To combine accompanying drawing that structural principle of the present invention and technological principle are done further detailed description below.
Referring to accompanying drawing; Integrated fluidized bed mild-gasification brown coal upgrading of the present invention system; Comprise a crushing and screening system 1, the material outlet end of crushing and screening system 1 links to each other with the feed inlet end of predrying device run coal bin 2 with low value gas-fired incinerator run coal bin 20, and the discharge port end of predrying device run coal bin 2 is connected with the feed inlet end of feeding machine 3; The discharge port end of feeding machine 3 is connected with the feeding mouth end of predrying device 4; The air opening end of fan 6 is connected with the blast inlet end of low value gas-fired incinerator air preheater 5, and the air opening end of low value gas-fired incinerator air preheater 5 is connected with the blast inlet end of predrying device 4, and the air outlet of predrying device 4 is connected with the inlet end of cyclonic separator 7; The air opening end of cyclonic separator 7 is connected with the inlet end of fly-ash separator 8; The discharge port end of cyclonic separator 7 is connected with the feed inlet end in work in-process storehouse 10, and the exit end of fly-ash separator 8 is connected with the inlet end of induced draft fan 9, and the material outlet end of fly-ash separator 8 is connected with the feed inlet end in work in-process storehouse 10.
The discharge port end in work in-process storehouse 10 is connected with the feed inlet end of feeding machine 11; The discharge port end of feeding machine 11 is connected with the feed inlet end of fluidized bed mild-gasification brown coal upgrading reactor drum 12; The coarse particles finished product discharge port end of fluidized bed mild-gasification brown coal upgrading reactor drum 12 is connected with the feed inlet end of coarse particles finished product water cooler 13, and the discharge port end of coarse particles finished product water cooler 13 is connected with the feed inlet end of coarse particles finished bin 14; The smoke outlet of fluidized bed mild-gasification brown coal upgrading reactor drum 12 is connected with the gas approach end of cyclonic separator 19; The air opening end of cyclonic separator 19 is connected with the low value fuel gas inlet end of low value gas-fired incinerator 22; The discharge port end of cyclonic separator 19 is connected with the feeding mouth end of fine particle finished product water cooler 18, and the discharge port end of fine particle finished product water cooler 18 is connected with the feed inlet end of fine particle finished bin 17; The air opening end of fan 16 is connected with the blast inlet end of low value gas-fired incinerator air preheater 15, and the air opening end of low value gas-fired incinerator air preheater 15 is connected with the air compartment of fluidized bed mild-gasification brown coal upgrading reactor drum 12.
The discharge port end of run coal bin (20) is connected with the feed inlet end of feeding machine 21; The discharge port end of feeding machine 21 is connected with the feed inlet end of low value gas-fired incinerator 22; The exhanst gas outlet of low value gas-fired incinerator 22 is connected with the entrance end of cyclonic separator 24; The air opening end of cyclonic separator 24 is connected with the entrance end of back-end ductwork 32; The exit end of back-end ductwork 32 is connected with the entrance end of fly-ash separator 29, and the exit end of fly-ash separator 29 is connected with the entrance end of induced draft fan 30, and the exit end of induced draft fan 30 is connected with the entrance end of chimney 31; The slag notch end of low value gas-fired incinerator 22 is connected with the entrance end of slag cooler 25; The air opening end of fan 27 is connected with the blast inlet end of the air preheater 26 of low value gas-fired incinerator 22, and the air opening end of air preheater 26 is connected with the air compartment of low value gas-fired incinerator 22; The discharge port end of limestone system 23 is connected with the material returning device inclined tube of low value gas-fired incinerator 22; The air outlet of roots blower 28 is connected with the material returning device bottom air compartment of low value gas-fired incinerator 22.
Referring to accompanying drawing; Integrated fluidized bed mild-gasification brown coal process for upgrading of the present invention is: behind the particle that brown coal process crushing and screening system 1 is crushed to less than the 50mm granularity, deliver into run coal bin 2 and run coal bin 20, brown coal get into predrying device 4 from the discharge port of run coal bin 2 by feeding machine 3 controls; High temperature air is through after the predrying device 4; Temperature drops to below 100 ℃, after cyclonic separator 7 separation through afterbody, sends into fly-ash separator 8; After fly-ash separator 8 is most of solid removal,, send into work in-process storehouse 10 by the fine powder that cyclonic separator 7 and fly-ash separator 8 capture directly by induced draft fan 9 emptyings;
Predrying coal in the work in-process storehouse 10 feeds fluidized bed mild-gasification brown coal upgrading reactor drum 12 via feeding machine 11 and carries out degree of depth upgrading; Predrying coal in fluidized bed mild-gasification brown coal upgrading reactor drum 12 after the warm air fluidisation; Mild-gasification, burning, dry distillation reactor take place in fluidized bed mild-gasification brown coal upgrading reactor drum 12; Whole moisture in the brown coal are released in the flue gas, and the heat that the chemical reaction that the temperature of fluidized bed mild-gasification brown coal upgrading reactor drum 12 is taken place by brown coal produces is kept.
Through degree of depth upgrading; Can produce the upgrading brown coal of two kinds of different-grain diameters; Be coarse particles finished product and fine particle finished product; Wherein the coarse particles finished product enters coarse particles finished product water cooler 13 by the discharge gate of fluidized bed mild-gasification brown coal upgrading reactor drum 12 bottoms, sends into coarse particles finished bin 14 through being cooled to after temperature is lower than 75 ℃; After a part of fine particle finished product that flue gas carries separates via cyclonic separator 19, most ofly separatedly gets off, enter fine particle finished product water cooler 18, send into fine particle finished bin 17 after temperature is lower than 75 ℃ through being cooled to by the discharge gate of cyclonic separator 19 bottoms.
The 22 burning utilizations of low value gas-fired incinerator are sent in low value combustion gas by fluidized bed mild-gasification brown coal upgrading reactor drum 12 is discharged after cyclonic separator 19 is removed most of coal dust; Low value gas-fired incinerator 22 is a burner hearth adiabatic circular fluid bed, realizes the abundant burning of low value combustion gas and reduces pollutent (SO through afterburning part solid fuel and interpolation Wingdale
2) discharging; The high-temperature flue gas that low value burning incinerator 22 produces via being arranged in air preheater 5,15, the 26 heat exchange coolings in the back-end ductwork 32 after after fly-ash separator 29 goes out of the city, send into chimney 31 emptyings by induced draft fan 30; Cold wind is admitted to be delivered to predrying device 4, fluidized bed mild-gasification brown coal upgrading reactor drum 12 and low value gas-fired incinerator 22 and utilizes after air preheater 5,15,26 heat exchange heat up.
Fluidizing velocity in the predrying device 4 is controlled between 1.0～6.0m/s, and temperature is controlled between 20～90 ℃.
Fluidizing velocity in the fluidized bed mild-gasification brown coal upgrading reactor drum 12 is controlled between 1.0～6.0m/s, and the temperature of main reaction region is controlled between 300 ℃～700 ℃.
Through the brown coal of upgrading, its moisture finally can control to＜and 10%.
In the accompanying drawing, 1 is the crushing and screening system; 2 is run coal bin; 3 is feeding machine; 4 is predrying device; 5 is air preheater; 6 is fan; 7 is cyclonic separator; 8 is fly-ash separator; 9 is induced draft fan; 10 is the work in-process storehouse; 11 is feeding machine; 12 is fluidized bed mild-gasification brown coal upgrading reactor drum; 13 is coarse particles finished product water cooler; 14 is the coarse particles finished bin; 15 is air preheater; 16 is fan; 17 is the fine particle finished bin; 18 is fine particle finished product water cooler; 19 is cyclonic separator; 20 is run coal bin; 21 is feeding machine; 22 is the low value gas-fired incinerator; 23 is limestone system; 24 is cyclonic separator; 25 is slag cooler; 26 is air preheater; 27 is fan; 28 is roots blower; 29 is fly-ash separator; 30 is induced draft fan; 31 is chimney; 32 is back-end ductwork.
Claims (9)
1. integrated fluidized bed mild-gasification brown coal upgrading system; Comprise a crushing and screening system (1); It is characterized in that; The material outlet end of crushing and screening system (1) links to each other with the feed inlet end of predrying device run coal bin (2) with low value gas-fired incinerator run coal bin (20); The discharge port end of predrying device run coal bin (2) is connected with the feed inlet end of feeding machine (3), and the discharge port end of feeding machine (3) is connected with the feeding mouth end of predrying device (4), and the air opening end of fan (6) is connected with the blast inlet end of low value gas-fired incinerator air preheater (5); The air opening end of low value gas-fired incinerator air preheater (5) is connected with the blast inlet end of predrying device (4); The air opening end of predrying device (4) is connected with the inlet end of cyclonic separator (7), and the air opening end of cyclonic separator (7) is connected with the inlet end of fly-ash separator (8), and the discharge port end of cyclonic separator (7) is connected with the feed inlet end of work in-process storehouse (10); The exit end of fly-ash separator (8) is connected with the inlet end of induced draft fan (9), and the material outlet end of fly-ash separator (8) is connected with the feed inlet end of work in-process storehouse (10).
2. integrated fluidized bed mild-gasification brown coal upgrading as claimed in claim 1 system; It is characterized in that; The discharge port end in work in-process storehouse (10) is connected with the feed inlet end of feeding machine (11); The discharge port end of feeding machine (11) is connected with the feed inlet end of fluidized bed mild-gasification brown coal upgrading reactor drum (12); The coarse particles finished product discharge port end of fluidized bed mild-gasification brown coal upgrading reactor drum (12) is connected with the feed inlet end of coarse particles finished product water cooler (13), and the discharge port end of coarse particles finished product water cooler (13) is connected with the feed inlet end of coarse particles finished bin (14); The smoke outlet of fluidized bed mild-gasification brown coal upgrading reactor drum (12) is connected with the gas approach end of cyclonic separator (19); The air opening end of cyclonic separator (19) is connected with the low value fuel gas inlet end of low value gas-fired incinerator (22); The discharge port end of cyclonic separator (19) is connected with the feeding mouth end of fine particle finished product water cooler (18), and the discharge port end of fine particle finished product water cooler (18) is connected with the feed inlet end of fine particle finished bin (17); The air opening end of fan (16) is connected with the blast inlet end of low value gas-fired incinerator air preheater (15), and the air opening end of low value gas-fired incinerator air preheater (15) is connected with the air compartment of fluidized bed mild-gasification brown coal upgrading reactor drum (12).
3. arrangement fluidized bed mild-gasification upgrading as claimed in claim 1 system; It is characterized in that; The discharge port end of run coal bin (20) is connected with the feed inlet end of feeding machine (21); The discharge port end of feeding machine (21) is connected with the feed inlet end of low value gas-fired incinerator (22); The smoke outlet of low value gas-fired incinerator (22) is connected with the entrance end of cyclonic separator (24), and the air opening end of cyclonic separator (24) is connected with the entrance end of back-end ductwork (32), and the exit end of back-end ductwork (32) is connected with the entrance end of fly-ash separator (29); The exit end of fly-ash separator (29) is connected with the entrance end of induced draft fan (30), and the exit end of induced draft fan (30) is connected with chimney (31) entrance end; The slag notch end of low value gas-fired incinerator (22) is connected with the entrance end of slag cooler (25); The air opening end of fan (27) is connected with the blast inlet end of the air preheater (26) of low value gas-fired incinerator (22), and the air opening end of air preheater (26) is connected with the air compartment of low value gas-fired incinerator (22); The discharge port end of limestone system (23) is connected with the material returning device inclined tube appropriate position of low value gas-fired incinerator (22); The air outlet of roots blower (28) is connected with the material returning device bottom air compartment of low value gas-fired incinerator (22).
4. integrated fluidized bed mild-gasification brown coal process for upgrading as claimed in claim 1; It is characterized in that; Brown coal deliver into run coal bin (2) and run coal bin (20) after being crushed to the particle less than the 50mm granularity through crushing and screening system (1), and brown coal get into predrying device (4) from the discharge port of run coal bin (2) by feeding machine (3) control; High temperature air through predrying device (4) afterwards; Temperature drops to below 100 ℃, after cyclonic separator (7) separation through afterbody, sends into fly-ash separator (8); After fly-ash separator (8) is most of solid removal,, send into work in-process storehouse (10) by the fine powder that cyclonic separator (7) and fly-ash separator (8) capture directly by induced draft fan (9) emptying; Predrying coal in the work in-process storehouse (10) feeds fluidized bed mild-gasification brown coal upgrading reactor drum (12) via feeding machine (11) and carries out degree of depth upgrading; Predrying coal in upgrading reactor drum (12) after the warm air fluidisation; Mild-gasification, burning, dry distillation reactor take place in fluidized bed mild-gasification brown coal upgrading reactor drum (12); Whole moisture in the brown coal are released in the flue gas, and the heat that the chemical reaction that the temperature of fluidized bed mild-gasification brown coal upgrading reactor drum (12) is taken place by brown coal produces is kept;
Through degree of depth upgrading; Can produce the upgrading brown coal of two kinds of different-grain diameters; Be coarse particles finished product and fine particle finished product; Wherein the coarse particles finished product enters coarse particles finished product water cooler (13) by the discharge gate of fluidized bed mild-gasification brown coal upgrading reactor drum (12) bottom, sends into coarse particles finished bin (14) through being cooled to after temperature is lower than 75 ℃; After a part of fine particle finished product that flue gas carries separates via cyclonic separator (19); Major part is separated gets off; Discharge gate by cyclonic separator (19) bottom enters fine particle finished product water cooler (18), sends into fine particle finished bin (17) through being cooled to after temperature is lower than 75 ℃;
Low value combustion gas by fluidized bed mild-gasification brown coal upgrading reactor drum (12) is discharged is sent into burner hearth burning utilization by low value gas-fired incinerator (22) after cyclonic separator (19) is removed most of coal dust; The high-temperature flue gas that low value burning incinerator (22) produces is via being arranged in air preheater (5,15,26) the heat exchange cooling in the back-end ductwork (32) after after fly-ash separator (29) discharge, send into chimney (31) emptying by induced draft fan (30); Cold wind is admitted to delivers to the utilizations of predrying device (4), fluidized bed mild-gasification brown coal upgrading reactor drum (12) and low value gas-fired incinerator (22) after air preheater (5,15,26) heat exchange heats up.
5. integrated fluidized bed mild-gasification brown coal process for upgrading as claimed in claim 4 is characterized in that, the fluidizing velocity in the predrying device (4) is controlled between 1.0～6.0m/s.
6. integrated fluidized bed mild-gasification brown coal process for upgrading as claimed in claim 4 is characterized in that, the temperature in the predrying device (4) is controlled between 20～90 ℃.
7. integrated fluidized bed mild-gasification brown coal process for upgrading as claimed in claim 4 is characterized in that, the fluidizing velocity in the fluidized bed mild-gasification brown coal upgrading reactor drum (12) is controlled between 1.0～6.0m/s.
8. integrated fluidized bed mild-gasification brown coal process for upgrading as claimed in claim 4 is characterized in that, the temperature of fluidized bed mild-gasification brown coal upgrading reactor drum (12) main reaction region is controlled between 300 ℃～700 ℃.
9. integrated fluidized bed mild-gasification brown coal process for upgrading as claimed in claim 4; It is characterized in that; Low value gas-fired incinerator (22) is a burner hearth adiabatic circular fluid bed; Its temperature of combustion is 800～950 ℃, realizes the abundant burning of low value combustion gas and the discharging of reduction pollutent through afterburning solid fuel and interpolation Wingdale.
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|---|---|---|---|---|
| CN102506575B (en) * | 2011-09-21 | 2014-06-18 | 千秋能源（上海）有限公司 | Treatment process for lignite upgrading waste water and lignite upgrading system |
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