CN204100275U - The pulverized coal preparation system that Ball Mill and fan mill combine - Google Patents
The pulverized coal preparation system that Ball Mill and fan mill combine Download PDFInfo
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- CN204100275U CN204100275U CN201420573773.4U CN201420573773U CN204100275U CN 204100275 U CN204100275 U CN 204100275U CN 201420573773 U CN201420573773 U CN 201420573773U CN 204100275 U CN204100275 U CN 204100275U
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- 239000003245 coal Substances 0.000 title claims abstract description 79
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 67
- 239000000446 fuel Substances 0.000 claims abstract description 42
- 238000001035 drying Methods 0.000 claims abstract description 36
- 239000002023 wood Substances 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 235000012054 meals Nutrition 0.000 claims abstract description 4
- 239000003570 air Substances 0.000 claims description 48
- 238000002156 mixing Methods 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 18
- 230000008676 import Effects 0.000 claims description 14
- 239000002274 desiccant Substances 0.000 claims description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 238000002955 isolation Methods 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 9
- 235000019504 cigarettes Nutrition 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 3
- 239000003077 lignite Substances 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 abstract description 3
- 239000010802 sludge Substances 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 7
- 238000010248 power generation Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005619 thermoelectricity Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002802 bituminous coal Substances 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000010791 domestic waste Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 241000269793 Cryothenia peninsulae Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Abstract
The utility model discloses the pulverized coal preparation system of a kind of Ball Mill and fan mill combination, within the system, high-moisture inferior fuel batcher is connected to the charging aperture of drying tube, the discharging opening of drying tube is connected to the charging aperture of mill separator through fan mill, the outlet of mill separator is connected to powder collector, the weary gas outlet of powder collector is successively through apparatus for recovering, weary gas blower fan is connected to the air inlet of air and powder mixer, the meal outlet of powder collector is connected to powder storehouse through wood scraps separator, powder storehouse is connected to machine supplying powder, machine supplying powder is connected to the powder inlet of air and powder mixer, the discharging opening of air and powder mixer connects the burner of boiler.Native system can meet the needs mixed on Large Copacity high parameter coal-fired power station boiler and burn high-moisture inferior fuel, there is the advantage that high-moisture inferior fuel treating capacity is large, system thermal efficiency is high, can be used for the extensive recycling of the inferior fuels such as high water content brown coal, city sewage and sludge and slime.
Description
Technical field
The utility model belongs to thermal power generating technology field, particularly relates to power station boiler pulverizing system technology.
Background technology
The general layout of China's energy-consuming based on coal determines power generation in a long time will based on thermoelectricity.Within 2013, national coal production completes about 3,700,000,000 tons, consumption of coal about 36.1 hundred million tons, and the proportion accounting for primary energy consumption is 65.7%, considerably beyond the world average level of 29.2%.By the end of the year in 2013, national capacity of installed generator will reach 1,247,380,000 kilowatts, and wherein thermoelectricity installed capacity reaches 86,238 ten thousand kilowatts, accounting 69.1%; Annual national generating capacity 52,451 hundred million kilowatt hour, wherein thermoelectricity generated energy 42,184 hundred million kilowatt hour, accounting 80.4%.Thermal power generation coal accounts for about 50% of raw coal consumption.
The fast development of thermoelectricity brings huge resources and environment protection pressure.2012, independent thermal power plant SO2 emissions were 706.3 ten thousand tons, account for 39.8% of focal investigation industrial enterprise; NOx discharge is 981.6 ten thousand tons, accounts for 62.1% of focal investigation industrial enterprise; Cigarette (powder) dirt discharge capacity is 144.2 ten thousand tons, accounts for 15.1% of focal investigation industrial enterprise discharge capacity.
Coal resources in China distribution is serious uneven, also add the fluctuation of electricity coal supply.By the end of the year 2010, national coal is possessed and is found out resource reserve 13,412 hundred million tons.Wherein, the national coal reserves of nearly 76% has been concentrated in Shanxi, the Inner Mongol, Shaanxi and provinces and regions, Xinjiang four; The coal production of East Coastal developed regions only has 11%.In the area that coal resources are poor, the particularly coastal region in east China, meet the coal supply of fired power generating unit, from the large province of western producing coal or must abroad buy a large amount of raw coal.Different with the pit-head power station in rich coal area, the power plant in the poor area of coal resources, the buying of electricity coal becomes the work of a more complicated, need to consider the many factors such as coal quality, coal price, freight and procurement cycle when purchasing coal, the coal that final purchase cost performance is higher, the change of coal and the fluctuation of ature of coal all unavoidable, be difficult to ensure boiler use design coal steadily in the long term.In recent years, many power plant, in order to reduce cost of electricity-generating, constantly attempt on station boiler, mix the brown coal burning low heat value high-moisture, achieve certain effect.
Thermal power generation, except being except fuel with coal, goes back the various discarded object of burning, realizes the minimizing of discarded object, resource and innoxious.Such as adopt fluidized bed incinerator, grate furnace or Rotation error process domestic waste, mud and slime the like waste, obtain in China and apply more widely.But, because the moisture high heating value of domestic waste, mud and slime the like waste is low, generally differ greatly with the design fuel performance of large-sized station boiler, the original pulverized coal preparation system of boiler is difficult to the drying and the grinding requirement that adapt to these discarded objects, therefore is difficult to be used as fuel in large power plant.The capacity of current China incinerator is far smaller than large-sized station boiler, fully can not meet the handle demand of the growing discarded object of China.
The pulverized coal preparation system of existing boiler of power plant generally carries out type selecting according to the characteristic of design fuel and check fuel.The concrete pattern of pulverized coal preparation system comprises low speed coal mill bin storage type pulverizing system, double-inlet double-outlet steel ball coal mill straight blowing type milling system, Ball Mill unit pulverized-coal system and direct feed pulverized coal-fan mill system etc.At present, in domestic power plant, a kind of pulverized coal preparation system of pattern only joined usually by boiler.Because a kind of pulverized coal preparation system is only applicable to a specific class A fuel A, when therefore will mix the very large fuel of burning two kinds of nature differences on a boiler, the restriction of pulverized coal preparation system will be subject to and affect the mixed-fuel burning proportion of inferior fuel.Such as, be bituminous coal at design fuel, adopt on the boiler of Ball Mill unit pulverized-coal system, the brown coal vast scale high efficiency to mix to burn high-moisture or mud the like waste are just difficult to realization.
Therefore; Development of Novel pulverized coal preparation system; adapt to common coal and inferior fuel (brown coal as low-calorie in high-moisture, city sewage and sludge and the slime etc.) requirement of multifuel combustion on station boiler; be the important foundation of being carried out extensive inferior fuel recycling by thermal power generation, have positive effect for saving high-grade fuel and promotion environmental protection.
Utility model content
Technical problem to be solved in the utility model be to provide a kind of can meet in Large Copacity high parameter coal-burning power plant, to carry out extensive low energy consumption mix the novel pulverized coal preparation system burning high-moisture inferior fuel needs.This pulverized coal preparation system both can carry out conventional pulverized coal preparation, also can carry out the drying of high moisture fuel, powder process, the weary gas cooling condensation of drier and heat recovery simultaneously, overcome the deficiency existed in existing conventional coal-burning power plant and incineration plant.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
The pulverized coal preparation system that Ball Mill and fan mill combine, comprises feeder, the first drying tube, low speed coal mill, isolation door; Described feeder, the first drying tube, low speed coal mill, isolation door connect successively, the outlet of isolation door is connected to the burner of boiler, it is characterized in that: also include high moisture fuel batcher, drying tube, fan mill, mill separator, powder collector, wood scraps separator, powder storehouse, apparatus for recovering, weary gas blower fan, machine supplying powder, air and powder mixer, seal fan, secondary air box and mixing chamber;
Described high-moisture inferior fuel batcher is connected to the charging aperture of drying tube, the discharging opening of drying tube is connected to the charging aperture of mill separator through fan mill, the outlet of mill separator is connected to powder collector, the outlet of powder collector is connected to the air inlet of air and powder mixer successively through apparatus for recovering, weary gas blower fan, the meal outlet of described powder collector is connected to powder storehouse through wood scraps separator, powder storehouse is connected to machine supplying powder, machine supplying powder is connected to the powder inlet of air and powder mixer, and the mixed export of air and powder mixer connects the burner of boiler;
In detailed description of the invention of the present utility model, be provided with mixing chamber outside described boiler, the mixed flue gas outlet of mixing chamber is connected to the desiccant inlet of drying tube, and the hot cigarette import of mixing chamber is connected to the high-temperature flue gas extraction opening on the flue of boiler; The flue afterbody of described boiler is provided with deduster, and house outlet flue connects cold smoke blower fan, and described cold smoke blower fan is connected to the cold smoke import of mixing chamber;
In the detailed description of the invention of utility model, the back-end ductwork of described boiler is also provided with air preheater, the air intlet of described air preheater connects pressure fan and primary air fan, outlet Secondary Air pipeline divides two-way, one road is connected to secondary air box import, secondary air box outlet is connected to boiler-burner, and a road is connected to the hot wind inlet of mixing chamber; Outlet First air pipeline is connected to low speed coal mill and the first drying tube.
In the detailed description of the invention of utility model, the outlet cold wind of described primary air fan divides three tunnels, and a road is connected to air preheater; One road is connected to seal fan import, and the outlet of seal fan is connected to low speed coal mill; One road is connected to low speed coal mill import First air pipeline.
Adopt technique scheme, high-moisture inferior fuel drying pipe is with high-temperature flue gas/black furnace cigarette/hot blast blending agent contacts by preliminarily dried, enter in the lump in fan and be milled to very thin particle diameter, and carry out degree of depth heat exchange with drying medium, moisture in inferior fuel declines to a great extent, disintegrating outlet primary mixture carries out after gas powder is separated through mill separator and powder collector, and high reduction through apparatus for recovering cooling condensation containing wet weary gas is re-used as powder feeding medium after humidity and carries out mixing burning with common coal dust in dried inferior fuel feeding boiler.This process higher moisture inferior fuel and high-temperature flue gas carry out direct contact heat transfer, dry speed and treating capacity can be significantly improved, reclaim the waste heat of dry weary gas, reduce energy consumption for drying, and reduce the moisture that inferior fuel brings boiler into, thus reduce boiler export flue gas dew point temperature and heat loss due to exhaust gas, improve boiler thermal output; Because oxygen content in flue gas is very low, therefore the security of drying system can be guaranteed, avoid blasting.
Therefore, the pulverized coal preparation system that the Ball Mill that the utility model proposes and fan mill combine, the needs mixed on Large Copacity high parameter coal-fired power station boiler and burn high-moisture inferior fuel can be met, there is the advantage that high-moisture inferior fuel treating capacity is large, system thermal efficiency is high, can be used for the extensive recycling of the inferior fuels such as high water content brown coal, city sewage and sludge and slime.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present utility model.
Detailed description of the invention
As shown in Figure 1, in the pulverized coal preparation system that Ball Mill of the present utility model and fan mill combine, feeder 22 is connected to the first drying tube 23, first drying tube 23 and is connected to low speed coal mill 24, low speed coal mill 24 is connected to isolation door 25, and isolation door 25 is connected to boiler-burner 9.
High-moisture inferior fuel batcher 1 is connected to the charging aperture of the second drying tube 2, the discharging opening of the second drying tube 2 is connected to fan mill 3, fan mill 3 is connected to mill separator 4, mill separator 4 is connected to the charging aperture of powder collector 5, the weary gas outlet of powder collector 5 is connected to apparatus for recovering 6, apparatus for recovering 6 is connected to weary gas blower fan 7, and weary gas blower fan 7 is connected to the air inlet mouth of air and powder mixer 8, and the discharging opening of air and powder mixer 8 is connected to boiler-burner 9.The meal outlet of powder collector 5 bottom is connected to wood scraps separator 10, and wood scraps separator 10 is connected to powder storehouse 11, and powder storehouse 11 is connected to machine supplying powder 12, and machine supplying powder 12 is connected to the powder inlet of air and powder mixer 8.The desiccant inlet of drying tube 2 is communicated with the mixed gas outlet of mixing chamber 13, the hot cigarette import of mixing chamber 13 is connected to the high-temperature flue gas extraction opening 14 of boiler 15, the cold smoke import of mixing chamber 13 connects cold smoke blower fan 16, cold smoke blower fan 16 is connected with the outlet of deduster 17, and the hot wind inlet of mixing chamber 13 connects air preheater 20.
Air preheater 20 import is connected to primary air fan 18 and pressure fan 19, the outlet of air preheater 20 First air is connected to the desiccant inlet of the first drying tube 23 and the desiccant inlet of low speed coal mill 24, air preheater 20 Secondary Air outlet point two-way, the first via is connected to secondary air box 21, secondary air box 21 is connected with boiler-burner 9, and the second road is connected to the hot wind inlet of mixing chamber 13.
The outlet cold air duct of primary air fan 18 divides three tunnels, and the first via is connected with air preheater 20; Be connected to the desiccant inlet of the first drying tube 23 and the desiccant inlet of low speed coal mill 24 after second tunnel and air preheater 20 First air export the ducts converge exported, after the heat primary air mixing temperature adjustment that cold wind and the described air preheater 20 of output export, send into the first drying tube 23 and low speed coal mill 24; 3rd road is connected to low speed coal mill 24 and exports between isolation door 25 import on pipeline.
In addition, also include seal fan 26, sealing blower fan 26 is connected to the desiccant inlet of low speed coal mill 24.
The operation principle of the pulverized coal preparation system that Ball Mill of the present utility model and fan mill combine is:
High-moisture inferior fuel is transported to the second drying tube 2 through high-moisture inferior fuel batcher 1, to contact with the drier from mixing chamber 13 and by preliminarily dried, then fan mill 3 is entered in the lump with drier, be further dried and be ground to regulation particle diameter, disintegrating outlet wind powder mixture enters mill separator 4 and is separated with powder collector 5, and qualified inferior fuel powder enters powder storehouse 11 through wood scraps separator 10; After being separated, the high weary gas that wets that contains enters cooled condensation in apparatus for recovering 6, it is released heat and is recovered, weary gas after dehumidifying as powder feeding medium, in air and powder mixer 8 with bottom, powder storehouse 11 connect the inferior fuel powder that machine supplying powder 12 sends here and mix, and be delivered to boiler-burner 9.
Raw coal sends into low speed coal mill 24 through feeder 22 through the first drying tube 23, and the primary wind and powder mixture that low speed coal mill 24 exports is transported to boiler-burner 9 through isolation door 25.
Pressure fan 19 sucks air from environment, and after air preheater 20 heats, a part delivers to boiler-burner 9 through secondary air box 21, and a part delivers to the hot wind inlet of mixing chamber 13.
Primary air fan 18 sucks air from environment, primary air fan 18 exports cold wind three whereabouts, part cold wind is heated to be heat primary air through air preheater 20, part cold wind sends into the first drying tube 23 and low speed coal mill 24 with after described heat primary air mixing temperature adjustment, and cold wind also can be delivered to low speed coal mill 24 and export pipeline between isolation door 25 import and purge for bypass.
Native system achieves the combination of the dry and burning of coal fired power generation, high-moisture inferior fuel, has the function of efficient, energy-conservation, economy, environmental protection.The pulverized coal preparation system that this Ball Mill and fan mill combine has following characteristics:
(1) fan mill system and Ball Mill system support use, is applicable to high-moisture inferior fuel and anthracite, abrasion index are greater than the meager coal of 5 or the multifuel combustion generating of bituminous coal.
(2) this system higher moisture inferior fuel and high-temperature flue gas carry out direct contact heat transfer, dry speed can be significantly improved, reclaim the waste heat of dry weary gas, reduce energy consumption for drying, and reduce the moisture that inferior fuel brings boiler into, thus reduce boiler export flue gas dew point temperature and heat loss due to exhaust gas, improve boiler thermal output; Because oxygen content in flue gas is very low, therefore the security of drying system can be guaranteed, avoid blasting.
(3) the high-moisture inferior fuel disposal ability of this system can reach more than 100t/h, is conducive to the extensive recycling level realizing high-moisture inferior fuel.
But, those of ordinary skill in the art will be appreciated that, above embodiment is only used to the utility model is described, and be not used as restriction of the present utility model, as long as in spirit of the present utility model, all will drop in Claims scope of the present utility model the change of the above embodiment, modification.
Claims (6)
1. a pulverized coal preparation system for Ball Mill and fan mill combination, comprises feeder, the first drying tube, low speed coal mill, isolation door; Described feeder, the first drying tube, low speed coal mill, isolation door connect successively, and the outlet of isolation door is connected to the burner of boiler, it is characterized in that:
Also include high moisture fuel batcher, the second drying tube, fan mill, mill separator, powder collector, wood scraps separator, powder storehouse, apparatus for recovering, weary gas blower fan, machine supplying powder, air and powder mixer;
Described high-moisture inferior fuel batcher is connected to the charging aperture of drying tube, the discharging opening of drying tube is connected to the charging aperture of mill separator through fan mill, the outlet of mill separator is connected to powder collector, the weary gas outlet of powder collector is connected to the air inlet of air and powder mixer successively through apparatus for recovering, weary gas blower fan, the meal outlet of described powder collector is connected to powder storehouse through wood scraps separator, powder storehouse is connected to machine supplying powder, machine supplying powder is connected to the powder inlet of air and powder mixer, and the discharging opening of air and powder mixer connects the burner of boiler.
2. the pulverized coal preparation system of Ball Mill according to claim 1 and fan mill combination, it is characterized in that: outside described boiler, be provided with mixing chamber, the mixed flue gas outlet of mixing chamber is connected to the desiccant inlet of drying tube, and the hot cigarette import of mixing chamber is connected to the high-temperature flue gas extraction opening on the flue of boiler; The flue afterbody of described boiler is provided with deduster, and house outlet flue connects cold smoke blower fan, and described cold smoke blower fan is connected to the cold smoke import of mixing chamber.
3. the pulverized coal preparation system of Ball Mill according to claim 2 and fan mill combination, it is characterized in that: the back-end ductwork of described boiler is also provided with air preheater, the air intlet of described air preheater connects pressure fan and primary air fan, outlet Secondary Air pipeline divides two-way, the first via is connected to secondary air box import, and secondary air box outlet is connected to boiler-burner; Second road is connected to the hot wind inlet of mixing chamber.
4. the pulverized coal preparation system of Ball Mill according to claim 3 and fan mill combination, is characterized in that: the outlet First air pipeline of described air preheater is connected to the desiccant inlet of described low speed coal mill and the desiccant inlet of the first drying tube.
5. the pulverized coal preparation system of Ball Mill according to claim 4 and fan mill combination, is characterized in that: the outlet cold air duct of described primary air fan divides three tunnels, and the first via is connected to air preheater; The desiccant inlet of the first drying tube and the desiccant inlet of low speed coal mill is connected to after second tunnel and air preheater First air export the ducts converge exported; 3rd road to be connected between low speed coal mill outlet with isolation door import on pipeline.
6. the pulverized coal preparation system of Ball Mill according to claim 5 and fan mill combination, it is characterized in that: also include seal fan, described seal fan is connected to the desiccant inlet of low speed coal mill.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420573773.4U CN204100275U (en) | 2014-09-30 | 2014-09-30 | The pulverized coal preparation system that Ball Mill and fan mill combine |
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| CN201420573773.4U CN204100275U (en) | 2014-09-30 | 2014-09-30 | The pulverized coal preparation system that Ball Mill and fan mill combine |
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| CN201420573773.4U Expired - Fee Related CN204100275U (en) | 2014-09-30 | 2014-09-30 | The pulverized coal preparation system that Ball Mill and fan mill combine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940026A (en) * | 2017-03-27 | 2017-07-11 | 中国能源建设集团广东省电力设计研究院有限公司 | Boiler milling system |
| CN107314391A (en) * | 2017-06-16 | 2017-11-03 | 孙五 | A kind of technology that boiler Winter protection is carried out using seal fan system |
| CN111237777A (en) * | 2020-01-10 | 2020-06-05 | 浙江浙能技术研究院有限公司 | Device and method for mixed sludge burning of medium-speed coal mill |
-
2014
- 2014-09-30 CN CN201420573773.4U patent/CN204100275U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940026A (en) * | 2017-03-27 | 2017-07-11 | 中国能源建设集团广东省电力设计研究院有限公司 | Boiler milling system |
| CN107314391A (en) * | 2017-06-16 | 2017-11-03 | 孙五 | A kind of technology that boiler Winter protection is carried out using seal fan system |
| CN111237777A (en) * | 2020-01-10 | 2020-06-05 | 浙江浙能技术研究院有限公司 | Device and method for mixed sludge burning of medium-speed coal mill |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shi Dazhong Inventor after: Shi Dengyu Inventor after: Wang Bo Inventor before: Shi Dazhong Inventor before: Pei Yufeng Inventor before: Shi Dengyu Inventor before: Wang Bo Inventor before: Wang Yining Inventor before: Yao Yuge |
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| COR | Change of bibliographic data | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |