CN102853654B - Air distribution process and air distribution system for rotary kiln - Google Patents
Air distribution process and air distribution system for rotary kiln Download PDFInfo
- Publication number
- CN102853654B CN102853654B CN201210401407.6A CN201210401407A CN102853654B CN 102853654 B CN102853654 B CN 102853654B CN 201210401407 A CN201210401407 A CN 201210401407A CN 102853654 B CN102853654 B CN 102853654B
- Authority
- CN
- China
- Prior art keywords
- fume pipe
- oxygen
- pipe
- air
- flue gas
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides an air distribution process and an air distribution system for a rotary kiln. The air distribution process comprises smoke purification, smoke recirculation, smoke powder feeding, smoke adjustment, oxygen enrichment preparation and enriching oxygen conveying. Smoke passing through a pre-heater or a waste heat boiler is subjected to particle and dust removal through a de-duster, and the smoke passing through a smoke recirculation fan is used for conveying coal powder for a kiln head combustor or a decomposing furnace, and is used as smoke gas at the center of the combustor to adjust flame shape and the position of a flame high-temperature area; air with high oxygen concentration is prepared by oxygen preparing equipment, and is conveyed to the kiln head combustor or is supplied into an air duct of the decomposing furnace after the air with high oxygen concentration is mixed with the air to obtain the air with relatively low oxygen concentration. According to the air distribution process provided by the invention, the oxygen enrichment air combustion supporting and the smoke recirculation can be comprehensively used on the rotary kiln, so that the involvement amount of cold air is reduced; the fuel coal consumption amount is reduced; the flame shape and the position of the high-temperature area can be adjusted; the generation of nitric oxides is reduced; the selection range of fuel is widened; and the system use ratio is improved. The air distribution process and system are simple, are convenient to use, and have good utilization effect.
Description
Technical field
The present invention relates to a kind of air distribution technique and system, especially a kind of rotary kiln air distribution technique and system that is applicable to oxygenized air combustion supporting and flue gas recirculation integrated application in cement industry.
Background technology
The resource-integrated industry that cement industry is the energy, ore resource consumption is large, is subject to the serious restriction of inadequate resource, environmental pollution at present.Also there is a big difference from world standard for China's ton cement comprehensive energy consumption, and coal accounts for 35%-40% in manufacture of cement cost, and therefore, for cement industry, reducing coal consumption is the effective way reducing production costs.
Through fast development the Eleventh Five-Year Plan period, China's cement output has reached 18.8 hundred million tons, and wherein new type nonaqueous cement grog production capacity is 12.6 hundred million tons.Annual discharge approximately 1,900,000 tons of nitrogen oxide (by mean concentration 850mg/Nm3) in cement production process.Cement output will be broken through 2,000,000,000 tons in this year, and cement industry is the key industry that reduces discharging nitrogen oxide, occupy thermal power generation, vehicle exhaust the third-largest discharged nitrous oxides industry afterwards.
Present stage, oxygenized air combustion supporting technology or flue gas recirculating technique are applied in rotary kiln, can solve subproblem, but have also brought a lot of new troubles simultaneously.Oxygenized air combustion supporting technology exists that burning is too fast, and the length of flame is short and thick, and heat convection such as weakens at the unfavorable factor in kiln, and flue gas recirculating technique exists the unfavorable factors such as fuel tolerance is poor.
Summary of the invention
Technical problem: the object of the invention is to overcome the weak point in prior art, a kind of technique is simple, capable of reducing energy consumption, reduce nitrogen oxide generation, the range of choice of raising fuel, rotary kiln air distribution technique and the system of raising system heat utilization efficiency are provided.
Technical scheme: rotary kiln air distribution technique of the present invention, comprises the steps:
A, the flue gas of 90 ℃-350 ℃ in preheater or waste heat boiler is drawn, through fume pipe, be transported in deduster, particle, dust in flue gas are removed, then introduced gas recirculating fan through the clean fume pipe of I;
B, gas recirculating fan are delivered to flue gas powder feed system by the flue gas after purifying through the clean fume pipe of II, by flue gas powder feed system, delivered in kiln hood burner or dore furnace again, maybe the flue gas after purifying is directly delivered in kiln hood burner or dore furnace through the clean fume pipe of II, by regulating the control valve control on flue gas pipeline to enter the exhaust gas volumn in kiln hood burner or dore furnace, thereby carry out the shape of flame or the adjusting of position, flame high-temperature region;
C, by oxygen generating plant, prepare oxygen enrichment or pure oxygen simultaneously, by oxygen enrichment blower fan, the oxygen enrichment of preparation or pure oxygen are transported in storage tank through I oxygen enrichment pipe, by II oxygen enrichment pipe, send into blender and air mixed diluting again, the oxygen-enriched air that forms 25-40% is transported in kiln hood burner or dore furnace and is used.
Realize the system of above-mentioned rotary kiln air distribution technique, comprise preheater or waste heat boiler, deduster, gas recirculating fan, kiln hood burner or dore furnace, blender, oxygen generating plant, oxygen enrichment blower fan, storage tank, blower fan, described preheater or waste heat boiler connect deduster through fume pipe, deduster connects gas recirculating fan through the clean fume pipe of I, gas recirculating fan connects flue gas powder feed system through the clean fume pipe of II, by flue gas powder feed system, connected again the arrival end of kiln hood burner or dore furnace, or gas recirculating fan directly connects the arrival end of kiln hood burner or dore furnace through the clean fume pipe of II, described oxygen generating plant connects storage tank through I oxygen enrichment pipe, on the pipeline of I oxygen enrichment pipe, be connected with oxygen enrichment blower fan, storage tank connects the arrival end of blender through II oxygen enrichment pipe, described blower fan connects the arrival end of blender through air hose, the port of export of blender connects the arrival end of kiln hood burner or dore furnace through oxygen-enriched air pipe.
Described flue gas powder feed system comprises the port of export and is connected in powder feeding pipeline and the clean fume pipe of III on kiln hood burner or dore furnace, powder feeding pipeline connects the clean fume pipe of IV through powder feeding blower fan, the arrival end of the clean fume pipe of IV and the clean fume pipe of III is connected through the clean fume pipe of three-way pipe and II, on powder feeding pipeline, be provided with successively powder feeding blower fan and be connected to the machine supplying powder under powder storehouse, the clean fume pipe of IV is provided with I control valve; The clean fume pipe of III is provided with V control valve.
Beneficial effect: the present invention fully utilizes on rotary kiln by oxygenized air combustion supporting and flue gas recirculation, reduced the amount of involving in of cold air, reduced coal-fired consumption, regulate flame profile and position, high-temperature region, reduced the generation of nitrogen oxide, improve the range of choice of fuel, improved system heat utilization efficiency.Flue gas in coal-fired rotary kiln can pulverized coal conveying, also can regulate the position of flame profile and flame high-temperature region.For oxygenized air combustion supporting and flue gas recirculation, on rotary kiln, apply the unfavorable factor existing, by two kinds of effective applied in any combination of technology, can realize following object: 1, by oxygenized air combustion supporting, increase the range of choice of fuel, can utilize inferior fuel; 2, utilize flue gas recirculation to regulate the length of flame and position, high-temperature region, strengthen heat convection in kiln; 3, by the applied in any combination of two kinds of technology, greatly reduce the amount of involving in of cold air, improve system effectiveness, reduce Fuel Consumption, reach energy-conservation object; 4, by the applied in any combination of two kinds of technology, reduce nitrogen gas concn, regulate flame profile and control flame temperature, reduce the generation of nitrogen oxide, reach the object that reduces discharging nitrogen oxide.Its technique and system are simple, easy to operate, and result of use is good, have practicality widely.
Accompanying drawing explanation
Fig. 1 is coal-fired rotary kiln oxygenized air combustion supporting of the present invention and flue gas recirculation schematic diagram;
Fig. 2 is that combustion gas of the present invention or fuel oil rotary kiln oxygen enrichment are controlled combustion-supporting and flue gas recirculation schematic diagram.
In figure: 1-preheater or waste heat boiler, 2-fume pipe, 3-deduster, the clean fume pipe of 4-I, 5-gas recirculating fan, the clean fume pipe of 6-II, 7-I control valve, 8-kiln hood burner or dore furnace, 9-oxygen-enriched air pipe, 10-II control valve, 11-blender, 12-III control valve, 13-II oxygen enrichment pipe, 14-air hose, 15-IV control valve, 16-oxygen generating plant, 17-I oxygen enrichment pipe, 18-oxygen enrichment blower fan, 19-storage tank, 20-blower fan, the clean fume pipe of 21-III, the clean fume pipe of 22-IV, 23-powder feeding blower fan, 24-powder storehouse, 25-machine supplying powder, 26-powder feeding pipe, 27-V control valve.
The specific embodiment
Structure accompanying drawing is further described embodiments of the invention below:
Embodiment 1,
As shown in Figure 1, rotary kiln air distribution technique of the present invention: in coal-fired kiln, by being connected to fume pipe 2 on preheater or waste heat boiler 1, temperature in preheater or waste heat boiler 1 is reached to the exhanst gas outlet of 90 ℃-350 ℃ drawing, through fume pipe 2, send in coupled deduster 3, deduster 3 is removed the particle in flue gas or dust, by the clean fume pipe 4 of I, by flue gas, give recirculation blower 5 again, gas recirculating fan 5 is sent to flue gas powder feed system by flue gas through the clean fume pipe 6 of II, by flue gas powder feed system, delivered in kiln hood burner or dore furnace 8 again, by regulating the control valve control on flue gas pipeline to enter the exhaust gas volumn in kiln hood burner or dore furnace 8, thereby carry out the shape of flame or the adjusting of position, flame high-temperature region.Flue gas powder feed system is divided into two parts by flue gas, part of smoke enters kiln hood burner or dore furnace 8 through the clean fume pipe 21 of III, by V control valve 27 realizations that are arranged on the clean fume pipe 21 of III, to being transported to the exhaust gas volumn of kiln hood burner central passage, controls; Part of smoke enters the clean fume pipe 22 of the IV being connected with powder feeding pipe 26, and regulates by the I control valve 7 being arranged on the clean fume pipe 22 of IV the exhaust gas volumn that enters powder feeding blower fan 23.The coal dust that is contained in 24 li, powder storehouse is sent in powder feeding pipe 26 by machine supplying powder 25, and the flue gas after 23 pressurizations of powder feeding blower fan is transported to burning in kiln hood burner or dore furnace 8 by the coal dust entering in powder feeding pipe 26; At coal dust, be transported to the burning while in kiln hood burner or dore furnace 8, by oxygen enrichment or the pure oxygen of oxygen generating plant 16 made 25%-100%, through I oxygen enrichment pipe 17, by oxygen enrichment blower fan 18, be transported in storage tank 19, again by the III control valve 12 of II oxygen enrichment pipe 13, air that send here and that control by the IV control valve 15 on air hose 14 is mixed into 25%-40% oxygen-enriched air in blender 11 with blower fan 20, through oxygen-enriched air pipe 9, is transported to kiln hood burner or dore furnace 8 uses.Described deduster 3, fume pipe 2, clean fume pipe and powder feeding pipe 26 can adopt insulation or accompany hot mode, at equipment or pipeline outer wall parcel insulation material, or adopt the modes such as steam, resistance to heat equipment or pipeline, to prevent that the flue gas in equipment or pipeline from externally dispelling the heat.
Realize the system of embodiment 1 rotary kiln air distribution technique, mainly by preheater or waste heat boiler 1, deduster 3, gas recirculating fan 5, kiln hood burner or dore furnace 8, blender 11, oxygen generating plant 16, oxygen enrichment blower fan 18, storage tank 19, blower fan 20 and flue gas powder feed system, formed; Described preheater or waste heat boiler 1 connect deduster 3 through fume pipe 2, deduster 3 connects gas recirculating fan 5 through the clean fume pipe 4 of I, gas recirculating fan 5 connects flue gas powder feed system through the clean fume pipe 6 of II, then by flue gas powder feed system, is connected the arrival end of kiln hood burner or dore furnace 8; Described flue gas powder feed system comprise the port of export and be connected in kiln hood burner or dore furnace 8 on powder feeding pipeline 26 and the clean fume pipe 21 of III, powder feeding pipeline 26 connects the clean fume pipe 22 of IV through powder feeding blower fan 23, the arrival end of the clean fume pipe 22 of IV and the clean fume pipe 21 of III is connected through the clean fume pipe 6 of three-way pipe and II, on powder feeding pipeline 26, be provided with successively powder feeding blower fan 23 and be connected to the machine supplying powder 25 under powder storehouse 24, the clean fume pipe 22 of IV is provided with I control valve 7; The clean fume pipe 21 of III is provided with V control valve 27.Described oxygen generating plant 16 connects storage tank 19 through I oxygen enrichment pipe 17, on the pipeline of I oxygen enrichment pipe 17, be connected with oxygen enrichment blower fan 18, storage tank 19 connects the arrival end of blender 11 through II oxygen enrichment pipe 13, described blower fan 20 connects the arrival end of blender 11 through air hose 14, the port of export of blender 11 connects the arrival end of kiln hood burner or dore furnace 8 through oxygen-enriched air pipe 9.
Embodiment 2,
As shown in Figure 2, rotary kiln air distribution technique of the present invention: in the kiln of combustion gas or fuel oil, the flue gas of 90 ℃ in preheater or waste heat boiler 1-350 ℃ is drawn, through fume pipe 2, be transported in deduster 3, particle, dust in flue gas are removed, then introduced gas recirculating fan 5 through the clean fume pipe 4 of I; Gas recirculating fan 5 is directly delivered to the flue gas after purifying in kiln hood burner or dore furnace 8 through the clean fume pipe 6 of II, by regulating the control valve control on flue gas pipeline to enter the exhaust gas volumn in kiln hood burner or dore furnace 8, thereby carry out the shape of flame or the adjusting of position, flame high-temperature region; Other part is identical with enforcement 1, and identical other partly omits.
Realize the system of embodiment 2 rotary kiln air distribution techniques, substantially the same manner as Example 1, something in common slightly.Difference: preheater or waste heat boiler 1 connect deduster 3 through fume pipe 2, deduster 3 connects gas recirculating fan 5 through the clean fume pipe 4 of I, and gas recirculating fan 5 directly connects the arrival end of kiln hood burner or dore furnace 8 through the clean fume pipe 6 of II.
Claims (1)
1. a rotary kiln air distribution technique, is characterized in that comprising the steps:
A, the flue gas of 90 ℃-350 ℃ in preheater or waste heat boiler (1) is drawn, through fume pipe (2), be transported in deduster (3), particle, dust in flue gas are removed, then introduced gas recirculating fan (5) through the clean fume pipe of I (4);
B, gas recirculating fan (5) are delivered to flue gas powder feed system by the flue gas after purifying through the clean fume pipe of II (6), by flue gas powder feed system, delivered in kiln hood burner or dore furnace (8) again, maybe the flue gas after purifying is directly delivered in kiln hood burner or dore furnace (8) through the clean fume pipe of II (6), by regulating the control valve control on flue gas pipeline to enter the exhaust gas volumn in kiln hood burner or dore furnace (8), thereby carry out the shape of flame or the adjusting of position, flame high-temperature region;
C, by oxygen generating plant (16), prepare oxygen enrichment or pure oxygen simultaneously, by oxygen enrichment blower fan (18), oxygen enrichment or the pure oxygen of preparation are transported in storage tank (19) through I oxygen enrichment pipe (17), by II oxygen enrichment pipe (13), send into blender (11) and air mixed diluting again, the oxygen-enriched air that forms 25-40% is transported in kiln hood burner or dore furnace (8) and is used.
2. a system that realizes rotary kiln air distribution technique described in claim 1, comprise preheater or waste heat boiler (1), deduster (3), gas recirculating fan (5), kiln hood burner or dore furnace (8), blender (11), oxygen generating plant (16), oxygen enrichment blower fan (18), storage tank (19), blower fan (20), it is characterized in that: described preheater or waste heat boiler (1) connect deduster (3) through fume pipe (2), deduster (3) connects gas recirculating fan (5) through the clean fume pipe of I (4), gas recirculating fan (5) connects flue gas powder feed system through the clean fume pipe of II (6), by flue gas powder feed system, connected again the arrival end of kiln hood burner or dore furnace (8), or gas recirculating fan (5) directly connects the arrival end of kiln hood burner or dore furnace (8) through the clean fume pipe of II (6), described oxygen generating plant (16) connects storage tank (19) through I oxygen enrichment pipe (17), on the pipeline of I oxygen enrichment pipe (17), be connected with oxygen enrichment blower fan (18), storage tank (19) connects the arrival end of blender (11) through II oxygen enrichment pipe (13), described blower fan (20) connects the arrival end of blender (11) through air hose (14), the port of export of blender (11) connects the arrival end of kiln hood burner or dore furnace (8) through oxygen-enriched air pipe (9).
3. rotary kiln blowing system according to claim 2, it is characterized in that: described flue gas powder feed system comprise the port of export and be connected in kiln hood burner or dore furnace (8) on powder feeding pipeline (26) and the clean fume pipe of III (21), powder feeding pipeline (26) connects the clean fume pipe of IV (22) through powder feeding blower fan (23), the arrival end of the clean fume pipe of IV (22) and the clean fume pipe of III (21) is connected through the clean fume pipe of threeway and II (6), on powder feeding pipeline (26), be provided with successively powder feeding blower fan (23) and be connected to the machine supplying powder (25) under powder storehouse (24), the clean fume pipe of IV (22) is provided with I control valve (7), the clean fume pipe of III (21) is provided with V control valve (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210401407.6A CN102853654B (en) | 2012-10-22 | 2012-10-22 | Air distribution process and air distribution system for rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210401407.6A CN102853654B (en) | 2012-10-22 | 2012-10-22 | Air distribution process and air distribution system for rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102853654A CN102853654A (en) | 2013-01-02 |
| CN102853654B true CN102853654B (en) | 2014-04-09 |
Family
ID=47400465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210401407.6A Active CN102853654B (en) | 2012-10-22 | 2012-10-22 | Air distribution process and air distribution system for rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102853654B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335515A (en) * | 2013-07-19 | 2013-10-02 | 北京汉能清源科技有限公司 | Low-nitrogen combustion system for concrete rotary kiln |
| CN104180368A (en) * | 2014-08-26 | 2014-12-03 | 山西蓝天环保设备有限公司 | Medium-and-low temperature hot fume powder feeding type coal powder combustion device and combustion process thereof |
| CN104654815B (en) * | 2015-02-06 | 2018-08-24 | 陈翔 | Mosaic ceramic kiln cogeneration utilization system |
| CN107869911A (en) * | 2017-11-17 | 2018-04-03 | 北京拓首能源科技股份有限公司 | A kind of energy-saving and emission-reduction gas supply-discharge system of tubular heater |
| CN108355420A (en) * | 2018-03-18 | 2018-08-03 | 上海柯来浦能源科技有限公司 | A kind of limekiln flue gas recirculation system |
| CN109185881A (en) * | 2018-09-30 | 2019-01-11 | 西安鑫顶天装备智能科技有限公司 | A kind of multisection type oxygen-enriched combustion-supporting burner special |
| CN109539257A (en) * | 2018-12-29 | 2019-03-29 | 北京首华科技发展有限公司 | A kind of thermal desorption production line denitrating system |
| CN113587665B (en) * | 2021-07-28 | 2022-11-29 | 杭州特盈能源技术发展有限公司 | Carbon-based oxygen-enriched combustion method for cement kiln flue gas circulation |
| CN113970938B (en) * | 2021-11-02 | 2022-05-17 | 吴联权 | Rotary kiln internal temperature regulation and control device and regulation and control method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6488765B1 (en) * | 1997-07-30 | 2002-12-03 | Cemex, Inc. | Oxygen enrichment of cement kiln system combustion |
| CN1200239C (en) * | 2002-01-08 | 2005-05-04 | 北京科技大学 | Oxygen-enriching heat-accumulating air preheating and flue gas recirculating technique |
| CN101403506A (en) * | 2008-08-29 | 2009-04-08 | 南京苏冶钙业技术有限公司 | Calcium carbide stove exhaust combustion and utilization method and device |
| CN201449130U (en) * | 2009-07-16 | 2010-05-05 | 南京中圣园机电设备有限公司 | Exhaust recirculating calcining kiln |
| CN202177298U (en) * | 2011-07-18 | 2012-03-28 | 西安暌源节能科技有限公司 | Rotary cement kiln system adopting membrane oxygen-enrichment combustion-supporting technique |
-
2012
- 2012-10-22 CN CN201210401407.6A patent/CN102853654B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102853654A (en) | 2013-01-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102853654B (en) | Air distribution process and air distribution system for rotary kiln | |
| WO2020182013A1 (en) | Multistage suspension preheating cement kiln system and control method therefor | |
| CN204165045U (en) | Warm flue gas recirculation coal powder burner in one | |
| CN103343965A (en) | Heating furnace system with oxygen-enriched combustion | |
| CN109574523A (en) | A kind of limekiln that the hot sending of gasification furnace coal gas of high temperature is directly burnt | |
| CN109721259B (en) | Lime kiln hot air circulation system | |
| CN102878820B (en) | Application process of smoke recirculation on rotary kiln | |
| CN102954687A (en) | Local oxygen-enriched combustion system of cement decomposition kiln | |
| CN102703157A (en) | Multi-product cleaning and producing method with coal gangue comprehensive utilization | |
| CN104132358A (en) | Coal-fired power plant boiler system suitable for low-load operation and combustion adjusting method of boiler system | |
| CN103496863A (en) | Production method of cement clinker by calcination with oxygen-rich reinforced lignite | |
| CN103968409B (en) | A kind of high-temperature and low-oxygen combustion device | |
| CN204786513U (en) | Modified bin storage type pulverizing system | |
| CN208038322U (en) | A kind of lime shaft kiln cooling air cyclic utilization system | |
| CN202973846U (en) | Air distribution system of rotary kiln | |
| CN105509469A (en) | Low-oxynitride decomposition furnace with precombustion furnace | |
| CN101195521B (en) | Method for producing margin coal gas by using steel in rotary cement kiln predecomposition furnace | |
| CN115340304A (en) | Device and method for producing light-burned magnesium oxide through decomposition outside five-stage suspension preheating kiln | |
| CN202193731U (en) | Flue gas waste heat double-circulating gas burning lime kiln | |
| CN203963976U (en) | Be suitable for the coal-fired plant boiler system of underrun | |
| CN108386865B (en) | A kind of 300MW coal unit reduces the control device and method of unburned carbon in flue dust | |
| CN204115463U (en) | A kind of internal heat type rotary kiln baking molybdenum concntrate combustion of natural gas heating system | |
| CN203024574U (en) | Local oxygen-enriched combustion system of cement calcining kiln | |
| CN209685619U (en) | A kind of limekiln that the hot sending of gasification furnace coal gas of high temperature is directly burnt | |
| CN202599095U (en) | Energy-saving sintering kiln body |
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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 221004 No. 12 Yang Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu, China Patentee after: XUZHOU KERONG ENVIRONMENTAL RESOURCES CO., LTD. Address before: 221004 No. 12 Yang Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu, China Patentee before: Xuzhou Combustion Control Research Institute Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200408 Address after: 221004 No. 12 Yang Shan Road, Xuzhou Economic Development Zone, Jiangsu, China Patentee after: XUZHOU COMBUSTION CONTROL RESEARCH INSTITUTE Co.,Ltd. Address before: 221004 No. 12 Yang Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu, China Patentee before: XUZHOU KERONG ENVIRONMENTAL RESOURCES Co.,Ltd. |