CN101220308A - Technique for drying low rank coal and producing moulded coal, and complete plant - Google Patents
Technique for drying low rank coal and producing moulded coal, and complete plant Download PDFInfo
- Publication number
- CN101220308A CN101220308A CNA2008100102404A CN200810010240A CN101220308A CN 101220308 A CN101220308 A CN 101220308A CN A2008100102404 A CNA2008100102404 A CN A2008100102404A CN 200810010240 A CN200810010240 A CN 200810010240A CN 101220308 A CN101220308 A CN 101220308A
- Authority
- CN
- China
- Prior art keywords
- coal
- low
- rank
- feeder
- rank coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses the technique of low-rank coal drying and briquette production: delivering the raw coal of the low-rank coal into a jaw crusher (12) through a coal machine (11) to crush the raw coal into grains that is smaller than 10 mm. The crusher adopts the jaw crushing method and has higher crushing efficiency. The crushed coal enters a fluidized bed dryer (13) and part of water is dried and removed primarily at the temperature of 100 DEG C to 150 DEG C, and then the crushed coal enters a coal mill (14) to further crush the coal into coal power with the granule degree of 0.6 to 1.0 mm, the coal power is then delivered into a indirect heat-transfer drum dryer (15) and carried out a secondary drying at the temperature of 150 DEG C to 350 DEG C to remove water. The dried coal powder with the qualified water content (5 to 18 percent) is delivered into a main feeder through a spiral feeder in a ration way under certain temperature (30 to 90 DEG C) after being cooled, and the feeding speed is controlled by the spiral feeder. The coal powder is delivered into an inner-roll type high-pressure briquette machine (16) which consists of eccentric rollers through the main feeder, the inner-roll type high-pressure briquette machine entrusts and molds the low-rank coal with high efficiency under high pressure (50 to 300 MPa), and then the entrusted and molded low-rank coal enters a product coal bunker (17) and the briquette products needed by the user are produced.
Description
Technical field: the present invention relates to the dry and briquette production Processes and apparatus of a kind of coal, especially a kind of low-rank coal dry and briquette production technology and suite of equipment.
Background technology: China is one of a few country that takes the primary energy source resource with coal as the leading factor, has become world's first coal power and first consumption of coal state.In coming few decades, China's sustainable development of economy will continue to rely on coal that main energy support (accounting for 60-70%) is provided.The coal in China turnout had reached 1,600,000,000 tons in 2004, and 2007 above 2,300,000,000 tons.According to statistics, the coal resources in China workable reserve occupies the third place in the world, accounts for 11.5% of world's total reserves.Wherein the low-rank coal reserves account for 16% of world's low-rank coal total reserves, and major part concentrates on North China (Inner Mongolia Autonomous Region) and Yunnan.The exploitation of the coal resources of China at present and utilizing based on bituminous coal and hard coal, the exploitation of low-rank coal and utilize level also very low.Along with China to the continuous increase of energy demand with to the excessive exploitation of bituminous coal, anthracite resource, will be more and more important to the development and utilization of low-rank coal, and be subjected to the great attention of State Council, National Development and Reform Committee recently.To reach hundred million tons of 2-3 every year according to China's low-rank coal output after the expectation 2008-2010 of the parties concerned.Compare with bituminous coal, hard coal, the advantage of low-rank coal is that price is lower, the reactive behavior height, but its calorific value is relatively low, water content higher (can reach 25-65%).One of key of low-rank coal development and use is the exploitation to low-rank coal drying, shaped coal technology and upgrading technology.
Because water content is very high, the direct incendiary efficient of low-rank coal is very low, and processing technology is very poor simultaneously.Generally adopt the water vapour drying process that low-rank coal is carried out drying at present abroad, directly deliver near coal-mine power plant then and be used for combustion power generation.With external different be, the near coal-mine power plant of China quantity is few, and most of power plant is away from the colliery.Therefore need to arrive the coal-burning power plant after the exploitation of the coal resources of China through long-distance transport.As the used coal of a lot of power plant of the east China and the southeastern coastal areas all transport from Shanxi, the colliery in the Inner Mongol, promptly the Coal Transport radius is bigger.This development and utilization to the low-rank coal resource is had higher requirement.For example the low-rank coal in the Inner Mongol triumph coalfield power plant that promptly needs part to be transported to outside Inner Mongolia Autonomous Region carries out combustion power generation.Consider that from transportation cost and combustion heat value aspect low-rank coal need just can be transported to power plant's burning after drying.The low-rank coal dry technology of report has the coal slurry dry technology that water vapor drying, MTE (mechanical hot extrusion) and NEDO (Japanese new forms of energy industrial technology is developed mechanism) are developing at present.Low-rank coal after the water vapour drying treatment of U.S.'s exploitation is called K-fuel, does not solve the problem of low-rank coal spontaneous combustion, even the possibility of spontaneous combustion is increased, and is not suitable for the national conditions of China's low-rank coal resources development and utilization.Because after the low-rank coal development of resources of China, low-rank coal will arrive other geographic coal-burning power plants by land and ship.Outside the vapour seasoning that the dewaters technology, still there is not other industrialized low-rank coal dry technology both at home and abroad.Mechanical hot extrusion (MTE) technology of low-rank coal research centre, Australia (Lignite CRC) research still is in the laboratory study development phase.This technical finesse efficient is extremely low, the low-rank coal water content after the processing still higher (still having 25-30% as Victoria's low-rank coal water content after handling).The plan that the pilot scale stand of per hour setting up 20 tons in 2008 is arranged under the subsidy of Loy Yang power plant economizes in this research group in dimension.The low-rank coal hot-pressing drying technology of Pacific Rim company limited (Edge PacificLtd) exploitation is in 5 tons/hour lab scale stage at present, and drying cost is 120-150 yuan.The low-rank coal dry technology of developing that Japan NEDO subsidizes utilizes heavy oil and low-rank coal combination treatment, realizes the drying and the modification of low-rank coal.This technology is applicable to liquidation of coal technology, and processing cost is higher, consumes a large amount of heavy oil, also is not suitable for China's national situation.This technology is carried out the small-scale test of Indonesia's low-rank coal at present in Indonesia.The technology that Australian White Energy company and CSIRO develop jointly then adopts the processing unit of flue gas drying and two roller extruding Australian brown coal to be carried out the production of drying treatment and moulded coal, set up 20 tons/hour pilot scale stand, carried out industry and promoting.In general, still there is not sophisticated low-rank coal dry technology at present.Therefore, the low-rank coal dry technology of exploitation suitable China low-rank coal characteristics and satisfied long-distance transport and storage requirement is very urgent task.
Summary of the invention: at above-mentioned the deficiencies in the prior art, the technology that the present invention proposes is in conjunction with high-pressure molding and utilize waste heat to carry out two technology of drying, both solved the difficult problem that spontaneous combustion easily takes place dried low-rank coal in storage and long-distance transport process, utilize the technology of flue gas place of water vapour seasoning also to solve the problem that the northern area of China lacks water resources simultaneously, help reducing drying cost.
For achieving the above object, the technical solution used in the present invention is: low-rank coal dry with briquette production technology: the low-rank coal raw coal is sent into jaw crusher (12) through feeder (11) be ground into＜particle of 10mm.Pulverizer adopts Hubei Province formula crumbling method, has higher crushing efficiency.Coal after the fragmentation enters fluidized bed dryer (13), under 100 ℃ ~ 150 ℃ temperature, carry out preliminarily dried and remove part moisture, enter coal pulverizer (14) then and further be ground into fine granularity (0.6 ~ 1.0mm) coal dust, coal dust is sent into indirect heat transfer rotating drum dryer (15) again, under 150 ℃ ~ 350 ℃ temperature, carry out redrying, to remove moisture.Dried coal dust is after overcooling, and under certain temperature (30 ~ 90 ℃), the coal dust of moisture content qualified (5-18%) is quantitatively sent into main feeder by helical screw feeder, and input speed is controlled by helical screw feeder.Coal dust is sent into the internal roller type high pressure molding coal machine of being made up of eccentric roller (16) through main feeder, (efficiently with the low-rank coal extrusion molding, enters finished product coal bunker (17) under 50 ~ 300Mpa), produces the briquette prod that the user needs at high pressure.
Dry and the briquette production suite of equipment of low-rank coal comprises feeder (11), jaw crusher (12), fluidized bed dryer (13), coal pulverizer (14), indirect heat transfer rotating drum dryer (15), internal roller type high pressure molding coal machine (16), finished product coal bunker (17).
Internal roller type high pressure molding coal machine (16) is the core cell of present technique equipment, mainly by be bearing in outer rotor (5) on the live roll (8), be contained in eccentric in ring go up and the internal tooth roller pressure dish (6) that pivots is formed.Comprise feeding unit (1), support frame (2), blow tank (3), spacing dumping device (4), outer rotor (5), internal tooth roller pressure dish (6), pressure support frame (7), live roll (8), base (9), main motor (10).Support frame (2) is fixed on the base (9).Feeding unit (1) is positioned at upper end of the present utility model, link to each other with spacing dumping device (4), spacing dumping device (4) is connected with blow tank (3) with outer rotor (5), the inner face of outer rotor (5) has groove, the continuous boundary of internal tooth roller pressure dish (6) is inserted in the groove, and the lower end of pressure support frame (7) links to each other with support frame (2) by hydraulic efficiency plant.The crossbeam of pressure support frame (7) is connected with internal tooth roller pressure dish (6) with bearing by axle.Main motor (10) is connected with live roll (8), live roll (8) and outer rotor (5) engagement.
The characteristics of present technique and suite of equipment are as follows:
(1) integrates the suite of equipment of the dry and briquette production technology of low-rank coal.This technology and equipment can carry out drying separately or realize the briquette production and the upgrading processing of dry and low-rank coal simultaneously, have the handiness and the integration of height.Unique industrialized low-rank coal dry technology is to utilize water vapor that low-rank coal is carried out drying at present, cost height not only, efficient is low, and dried low-rank coal is not suitable for long-distance transport, do not solve the problem of low-rank coal spontaneous combustion, and the direct contact drying technology of high-temperature flue gas has the danger of great combustion explosion in the process of carrying out the low-rank coal processing.Present technique is carried out the production that exsiccant is realized moulded coal simultaneously to low-rank coal, and improves its calorific value.Low-rank coal after the processing is adapted at the coal-burning power plant and smelter uses.
(2) high efficiency, low cost.Present technique has adopted unique thinking in the design of technology and equipment, compare with the MTE technology of abroad developing at present, and processing unit has high production efficiency, and drying effect is good, and running cost is low.The cost of ton coal comprehensive drying and briquette production is about 60～100 yuan, therefore in case realize industrialization and obtain industrial application to have the very strong market competitiveness.Compare with the drying and upgrading technology that Japanese NEDO is developing, cost also reduces greatly.Compare with the drying process that high-temperature flue gas directly contacts, the danger that produces blast in the treating processes is very little.
(3) dried low-rank coal spontaneous combustion possibility reduces greatly.Low-rank coal and high-order coal facies have the danger of spontaneous combustion than having high reactive behavior in the process that stores and transport, this is a difficult problem that perplexs world's low-rank coal industry for a long time.By the low-rank coal after the present techniques processing, the corresponding raising of its calorific value 300-500kJ/Kg, the index of spontaneous combustion simultaneously reduces greatly, can equally with the high-order coal be fit to long-distance transportation.Therefore, present technique has very high promotional value and prospects for commercial application.
Description of drawings:
Fig. 1 is a process flow diagram of the present invention.
Fig. 2 is the structural representation of internal roller type high pressure molding coal machine.
Embodiment:
As shown in Figure 1: the low-rank coal raw coal is sent into jaw crusher 12 and is ground into＜particle of 10mm through feeder 11.Pulverizer adopts Hubei Province formula crumbling method, has higher crushing efficiency.Coal after the fragmentation enters fluidized bed dryer 13, under 100 ℃ ~ 150 ℃ temperature, carry out preliminarily dried and remove part moisture, enter coal pulverizer 14 then and further be ground into fine granularity (0.6 ~ 1.0mm) coal dust, coal dust is sent into indirect heat transfer rotating drum dryer 15 again, under 150 ℃ ~ 350 ℃ temperature, carry out redrying, to remove moisture.Dried coal dust is after overcooling, and under certain temperature (30 ~ 90 ℃), the coal dust of moisture content qualified (5-18%) is quantitatively sent into main feeder by helical screw feeder, and input speed is controlled by helical screw feeder.Coal dust is sent into the internal roller type high pressure molding coal machine of being made up of eccentric roller 16 through main feeder, (efficiently with the low-rank coal extrusion molding, enters finished product coal bunker 17 under 50 ~ 300Mpa), produces the briquette prod that the user needs at high pressure.
Dry and the briquette production suite of equipment of low-rank coal comprises feeder 11, jaw crusher 12, fluidized bed dryer 13, coal pulverizer 14, indirect heat transfer rotating drum dryer 15, molding coal machine 16, finished product coal bunker 17.
As shown in Figure 2: internal roller type high pressure molding coal machine 16 is core cells of present technique equipment, mainly by be bearing in outer rotor 5 on the live roll 8, be contained in eccentric in ring go up and the internal tooth roller pressure dish 6 that pivots is formed.Comprise feeding unit 1, support frame 2, blow tank 3, spacing dumping device 4, outer rotor 5, internal tooth roller pressure dish 6, pressure support frame 7, live roll 8, base 9, main motor 10.Support frame 2 is fixed on the base 9.Feeding unit 1 is positioned at upper end of the present utility model, link to each other with spacing dumping device 4, spacing dumping device 4 is connected with blow tank 3 with outer rotor 5, the inner face of outer rotor 5 has groove, the continuous boundary of internal tooth roller pressure dish 6 is inserted in the groove, and the lower end of pressure support frame 7 links to each other with support frame 2 by hydraulic efficiency plant.The crossbeam of pressure support frame 7 is connected with internal tooth roller pressure dish 6 with bearing by axle.Main motor 10 is connected with live roll 8, live roll 8 and outer rotor 5 engagements.
With the centrifugal feeder 11 in two chambers coal dust is fed in the internal roller type highly compressed conduit.The axle journal of live roll 8 rotates in the biserial globe bearing, and the latter is contained on the support.Drive live roll 8 rotations by main motor 10 through step-down gear and two tunnel shafts, tunnel shaft uses shaft coupling with being connected of live roll 8.Two rollers rotate to same direction with same speed, and for pressure ring, they are motion-work wheels.
Outer rotor 5 tops are provided with spacing dumping device 4, and it is the shovel board of inserting in the pattern, and the moulded coal band by scooping up in the annulus and along impression it being converted into the monolithic moulded coal, is entered the finished product coal bunker of bottom then through blow tank 3.Impression on the moulded coal band is to be pressed into by the convex ridge on the internal tooth roller pressure dish 6.
Pressure ring is the solid forging part of high-quality steel.Inlay 48 pattern spares in the ring, 24 of every sides.Pattern spare is an arc, uses the wear resisting steel manufacturing, and is fixed by bolts on the pressure ring.These arcuate members combine, and become the annular outer wall of model groove.Press arc formwork in the disk outer rim with bolt, 16 of every sides, the inwall of formation pattern groove.Disk is contained on the axle securely, thereupon together rotation.
Compacting is during low-rank coal, and be 8000-10000 hour the work-ing life of pattern spare, after this must grinding, and will be on annulus or disk when reinstalling shimming.
The operating pressure of internal roller type high pressure molding coal machine is 50-300MPa.
Claims (2)
- Low-rank coal dry with briquette production technology, it is characterized in that, the low-rank coal raw coal is sent into jaw crusher (12) through feeder (11) be ground into＜particle of 10mm; Pulverizer adopts Hubei Province formula crumbling method, has higher crushing efficiency; Coal after the fragmentation enters fluidized bed dryer (13), under 100 ℃ ~ 150 ℃ temperature, carry out preliminarily dried and remove part moisture, enter coal pulverizer (14) then and further be ground into fine granularity (0.6 ~ 1.0mm) coal dust, coal dust is sent into indirect heat transfer rotating drum dryer (15) again, under 150 ℃ ~ 350 ℃ temperature, carry out redrying, to remove moisture; Dried coal dust is after overcooling, and under certain temperature (30 ~ 90 ℃), the coal dust of moisture content qualified (5-18%) is quantitatively sent into main feeder by helical screw feeder, and input speed is controlled by helical screw feeder; Coal dust is sent into the internal roller type high pressure molding coal machine of being made up of eccentric roller (16) through main feeder, (efficiently with the low-rank coal extrusion molding, enters finished product coal bunker (17) under 50 ~ 300Mpa), produces the briquette prod that the user needs at high pressure.
- 2. the dry and briquette production technology of low-rank coal as claimed in claim 1, used complete setting comprises feeder (11), jaw crusher (12), fluidized bed dryer (13), coal pulverizer (14), indirect heat transfer rotating drum dryer (15), finished product coal bunker (17), it is characterized in that, also comprise internal roller type high pressure molding coal machine (16), it comprises feeding unit (1), support frame (2), blow tank (3), spacing dumping device (4), outer rotor (5), internal tooth roller pressure dish (6), pressure support frame (7), live roll (8), base (9), main motor (10); Support frame (2) is fixed on the base (9); Feeding unit (1) is positioned at upper end of the present utility model, link to each other with spacing dumping device (4), spacing dumping device (4) is connected with blow tank (3) with outer rotor (5), the inner face of outer rotor (5) has groove, the continuous boundary of internal tooth roller pressure dish (6) is inserted in the groove, and the lower end of pressure support frame (7) links to each other with support frame (2) by hydraulic efficiency plant; The crossbeam of pressure support frame (7) is connected with internal tooth roller pressure dish (6) with bearing by axle; Main motor (10) is connected with live roll (8), live roll (8) and outer rotor (5) engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100102404A CN101220308B (en) | 2008-01-28 | 2008-01-28 | Technique for drying low rank coal and producing moulded coal, and complete plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100102404A CN101220308B (en) | 2008-01-28 | 2008-01-28 | Technique for drying low rank coal and producing moulded coal, and complete plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101220308A true CN101220308A (en) | 2008-07-16 |
| CN101220308B CN101220308B (en) | 2011-02-02 |
Family
ID=39630387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100102404A Expired - Fee Related CN101220308B (en) | 2008-01-28 | 2008-01-28 | Technique for drying low rank coal and producing moulded coal, and complete plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101220308B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735842A (en) * | 2008-11-14 | 2010-06-16 | 李柏荣 | Device for improving thermal efficiency of fire coal by low-cost drying and waterproofing of brown coal |
| CN102149798A (en) * | 2008-10-14 | 2011-08-10 | 株式会社神户制钢所 | Manufacturing method for molded solid fuel using porous coal as starting material |
| CN103060039A (en) * | 2012-12-27 | 2013-04-24 | 中国五环工程有限公司 | Drying and shaping process for lignite |
| CN103196801A (en) * | 2013-03-04 | 2013-07-10 | 神华集团有限责任公司 | Method and apparatus for measuring dynamic thermal stability of solid particles |
| CN103791697A (en) * | 2012-10-31 | 2014-05-14 | 大唐国际化工技术研究院有限公司 | Method of drying and dewatering brown coal at normal temperature |
| CN105121608A (en) * | 2013-04-24 | 2015-12-02 | 株式会社神户制钢所 | Method for producing molded solid fuel |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030933A (en) * | 1988-01-16 | 1989-02-08 | 长春煤炭科学研究所 | The moulding of brown coal binder free |
| CN1109498A (en) * | 1994-03-30 | 1995-10-04 | 中国矿业大学 | Old lignite forming technology without binding agent and its forming machine |
| CN1150970A (en) * | 1995-11-22 | 1997-06-04 | 鞍山钢铁公司 | Binder free typed briquette and its manufacturing technology |
| US7892302B2 (en) * | 2003-02-11 | 2011-02-22 | Commonwealth Scientific And Industrial Research Organisation | Briquetting process |
| CN100338193C (en) * | 2005-03-25 | 2007-09-19 | 程永明 | High performance gasification briquette for gas-injection boiler in oil field |
| CN1323144C (en) * | 2005-03-31 | 2007-06-27 | 张时能 | Process for producing gasification briquette |
-
2008
- 2008-01-28 CN CN2008100102404A patent/CN101220308B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102149798A (en) * | 2008-10-14 | 2011-08-10 | 株式会社神户制钢所 | Manufacturing method for molded solid fuel using porous coal as starting material |
| CN102149798B (en) * | 2008-10-14 | 2013-09-04 | 株式会社神户制钢所 | Manufacturing method for molded solid fuel using porous coal as starting material |
| CN101735842A (en) * | 2008-11-14 | 2010-06-16 | 李柏荣 | Device for improving thermal efficiency of fire coal by low-cost drying and waterproofing of brown coal |
| CN103791697A (en) * | 2012-10-31 | 2014-05-14 | 大唐国际化工技术研究院有限公司 | Method of drying and dewatering brown coal at normal temperature |
| CN103791697B (en) * | 2012-10-31 | 2015-09-30 | 大唐国际化工技术研究院有限公司 | A kind of method of brown coal air drying dehydration |
| CN103060039A (en) * | 2012-12-27 | 2013-04-24 | 中国五环工程有限公司 | Drying and shaping process for lignite |
| CN103196801A (en) * | 2013-03-04 | 2013-07-10 | 神华集团有限责任公司 | Method and apparatus for measuring dynamic thermal stability of solid particles |
| CN103196801B (en) * | 2013-03-04 | 2015-08-19 | 神华集团有限责任公司 | The dynamic thermal stability assay method of solid particle and device |
| CN105121608A (en) * | 2013-04-24 | 2015-12-02 | 株式会社神户制钢所 | Method for producing molded solid fuel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101220308B (en) | 2011-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101220308B (en) | Technique for drying low rank coal and producing moulded coal, and complete plant | |
| CN101701535B (en) | Process for upgrading and recycling lignite to jointly produce power, steam, coal gas, tar and moulded coal | |
| CN110982542B (en) | Method for preparing blast furnace blowing semicoke from low-rank coal based on hydrothermal reaction | |
| CN101463282B (en) | Industrial briquette and technique for producing the same | |
| CN106492967A (en) | A kind of biomass fuel crushes proportioner | |
| CN102665920A (en) | Vertical roller mill | |
| CN101722669A (en) | Pulverized coal molding method without binding agent and double-roller molding machine suitable for method | |
| AU2020101153A4 (en) | A Method For Grinding To Get Slag Micro-powder In Stages | |
| CN103045321B (en) | Method for drying and upgrading lignite | |
| CN103480301B (en) | A kind ofly grind straw extrusion, foam coal cylindrical particles substitutes the method that combustion gas prepared by lump coal | |
| CN203866268U (en) | System for preparing coal water slurry through coupling of pyrolysis and grinding of coal with low coalification degree | |
| CN101020850B (en) | Integral process and apparatus for drying and upgrading lignite | |
| CN208085057U (en) | A kind of biofuel briquetting machine | |
| CN205518015U (en) | Coal grinding apparatus containing ball mill | |
| CN209602457U (en) | A kind of transmission equipment for coking industry | |
| CN204249400U (en) | A kind of stalk particle flat-die shaped device | |
| CN104401031B (en) | A kind of stalk particle flat-die shaped device | |
| CN110773298A (en) | Staged grinding method for slag micro powder | |
| CN201021869Y (en) | Integrated processing device for wood coal drying extraction material | |
| CN201169066Y (en) | Inner roll type high pressure shaped-coal making machine | |
| WO2015102499A1 (en) | Waste and biomass pellets, manufacturing process and the pelletiser head used in the process | |
| CN107337208A (en) | A kind of system and method that calcium carbide is produced using biomass pyrolytic | |
| CN216346363U (en) | Pebble coal recycling system for medium-speed coal mill of power station boiler | |
| CN207192806U (en) | A kind of system that calcium carbide is produced using biomass pyrolytic | |
| CN206201537U (en) | A kind of combined bio matter pellet fuel forming machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20130128 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |