CN203530217U - Raw coke oven gas waste heat recycling system - Google Patents
Raw coke oven gas waste heat recycling system Download PDFInfo
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- CN203530217U CN203530217U CN201320537968.9U CN201320537968U CN203530217U CN 203530217 U CN203530217 U CN 203530217U CN 201320537968 U CN201320537968 U CN 201320537968U CN 203530217 U CN203530217 U CN 203530217U
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model discloses a raw coke oven gas waste heat recycling system, belonging to the field of raw coke oven gas waste heat recycling. The raw coke oven gas waste heat recycling system disclosed by the utility model comprises a heat exchange medium circulating system and a water replenishing system, wherein the heat exchange medium circulating system comprises a heat exchanger group, a steam pocket and a forced circulating pump, the water inlet of the heat exchanger group is connected with the water outlet of the steam pocket through the forced circulating pump, the water outlet of the heat exchanger group is connected with the water inlet of the steam pocket, and the steam outlet in the steam pocket is connected with an external steam pipe system; the water replenishing system comprises a buffer tank, a water replenishing pump, a water supplying pump and a desalting and deoxygenating tank, the water supplying pump is arranged between the water supplying pump and the desalting and deoxygenating tank, and the buffer tank is connected with the steam pocket through the water replenishing pump. According to the raw coke oven gas waste heat recycling system, raw coke oven gas waste heat can be effectively, safely and reliably recovered, a heat exchange medium is circularly converted into medium-pressure steam and low-pressure steam, the safe and normal operation of the raw coke oven gas waste heat recycling system can be effectively controlled, and the accident rate is reduced.
Description
Technical field
The utility model relates to a kind of waste heat recycling system, more particularly, relates to a kind of waste heat of coke oven crude gas recycling system.
Background technology
The high efficiente callback utilization of the residual heat resources that produce in coke making process flow process, is to set up resources conservation, the energy-conservation main direction in eco-friendly green coke-oven plant, is also one of main path reducing coke oven energy consumption.But, China utilizes support technology and equipment to lag behind to the exploitation of the excavation of secondary energy quality potentiality, value and low-quality residual heat and energy, in upcast, the waste heat of high temperature coke oven raw gas just fails effectively to utilize always, can only heat be wasted with cyclic ammonia water cooling.Still there is heat-transfer surface bonding tar, floss blockage problem by the processing medium water heat exchange in raw gas and chuck in someone, after heat-transfer surface damages, in chuck, processing medium water leaks into carbonizing chamber and affects coke production.Coal oven dithio-gas sensible heat accounts for 32% left and right of the heat expenditure of whole coke oven, and temperature, more than 650 degree, does not have the recycle device of mature and reliable to put into operation so far.
Through retrieval, the existing technical scheme of recycling for waste heat of coke oven crude gas is open, as China Patent No. ZL200810122773.1, Granted publication day is on December 1st, 2010, invention and created name is: a kind of waste heat of coke oven crude gas recovery system and recovery method, this application case relates to a kind of waste heat of coke oven crude gas recovery system and recovery method, mainly high-end absorption installation of heat energy, low side absorption installation of heat energy and water charging system, consist of, high-end absorption installation of heat energy is connected with low side absorption installation of heat energy by the cooling intake line of secondary; Recovery system connects water reservoir by water inlet pipe, as outside, enter the supplementary new water channel road of system, then through water reservoir, by filling pipe, be connected and carry out heat exchange respectively with high and low end secondary heat sink, the steam finally producing in drum is exported steam through steam output pipe.This application case has solved to a certain extent waste heat of coke oven crude gas and has reclaimed difficult problem, but its weak point is: the ascending tube crude-gas waste-heat recovery device of this application case is effectively improved, equipment is outmoded, and in the scheme of this application case, lack and detect Controlling System, can not effectively detect the safety of whole system and normally move.
Summary of the invention
1. the technical problem that utility model will solve
The purpose of this utility model is to overcome the easy coking and blocking of existing waste heat of coke oven crude gas recycling system, larger to external environment influence, and processing and interchanger for high temperature use undesirable deficiency in startup and stopped process, a kind of waste heat of coke oven crude gas recycling system is provided, the technical scheme that adopts the utility model to provide, both guaranteed heat transfer effect, effectively, safety, reclaim reliably raw gas waste heat, in can cyclically heat transferring medium being converted into again, low-pressure steam, fully recycle raw gas waste heat, can also effectively detect Controlling System operation simultaneously, guarantee that security of system normally moves, reduce accident rate.
2. technical scheme
For achieving the above object, the technical scheme that the utility model provides is:
A kind of waste heat of coke oven crude gas recycling system of the present utility model, comprise the heat transferring medium recycle system and water charging system, wherein: the described heat transferring medium recycle system comprises heat exchanger package, drum and forced circulation pump, the water-in of described heat exchanger package is connected with the water outlet of drum by forced circulation pump, the water outlet of described heat exchanger package is connected with the water-in of drum, and the vapour outlet on described drum is connected with extraneous steam pipe system;
Described water charging system comprises surge tank, small pump, service pump and desalination deoxygenation tank, and described service pump is arranged between surge tank and desalination deoxygenation tank, and described surge tank is connected with drum by small pump.
Further, described heat exchanger package comprises several upcast interchanger, and described upcast interchanger is by the female pipe of independent pipeline rear remittance parallel with one another.
Further, also comprise detection Controlling System, described detection Controlling System comprises temperature measurer, is arranged at liquid level of steam drum meter, loadometer, the under meter on drum and is arranged at the water level meter on surge tank, described temperature measurer is arranged at the water outlet of upcast interchanger, for measuring the medium temperature of upcast interchanger water outlet; Described loadometer is connected with drum, for measuring the vapor pressure in drum; Described under meter is arranged between drum and surge tank, for controlling the uninterrupted of small pump.
Further, described upcast interchanger comprises urceolus, middle cylinder and inner core, between described urceolus and middle cylinder, forms heat-insulating layer, between described middle cylinder and inner core, forms heat exchange layer, and the heat transferring medium of described heat exchange layer is de-mineralized water.
Further, between the water outlet of described heat exchanger package and the water-in of drum, be provided with drain valve.
Further, between the water-in of described heat exchanger package and surge tank, be provided with accident circulating pipe.
Further, also comprise coking clearing device, described coking clearing device is positioned at the bottom of upcast interchanger.
Further, also comprise air cooling device, described air cooling device is connected with the air intlet on upcast interchanger.
3. beneficial effect
The technical scheme that adopts the utility model to provide, compares with existing known technology, has following unusual effect:
(1) a kind of waste heat of coke oven crude gas recycling system of the present utility model, it comprises the heat transferring medium recycle system and water charging system, can guarantee coke oven for a long time, produce continuously safely and steadly, thereby recycles continuously the waste heat of raw gas;
(2) a kind of waste heat of coke oven crude gas recycling system of the present utility model, the water-in of its heat exchanger package is connected with the water outlet of drum by forced circulation pump, the water outlet of heat exchanger package is connected with the water-in of drum, vapour outlet on drum is connected with extraneous steam pipe system, can force to promote heat transferring medium circulation, guarantees to produce incessantly steam, the rate of recovery can reach 30%, the steam being recovered to is incorporated to existing coking steam pipe system, is utilized, and has reduced the energy consumption of coking process;
(3) a kind of waste heat of coke oven crude gas recycling system of the present utility model, its service pump is arranged between surge tank and desalination deoxygenation tank, surge tank is connected with drum by small pump, for supplementing, is converted into a part of water that steam re-uses, the normal safe operation of promotion equipment;
(4) a kind of waste heat of coke oven crude gas recycling system of the present utility model, its heat exchanger package comprises several upcast interchanger, upcast interchanger is by the female pipe of independent pipeline rear remittance parallel with one another, a plurality of upcast interchanger parallel runnings, improved on the one hand heat exchange efficiency, also avoided on the other hand because single upcast interchanger breaks down, and affected the normal operation of whole system, and can facilitate replacing or the maintenance of upcast interchanger;
(5) a kind of waste heat of coke oven crude gas recycling system of the present utility model, also comprises detection Controlling System, can effectively detect Controlling System operation, guarantees that security of system normally moves, and reduces accident rate;
(6) a kind of waste heat of coke oven crude gas recycling system of the present utility model, upcast interchanger comprises urceolus, middle cylinder and inner core, between urceolus and middle cylinder, form heat-insulating layer, between middle cylinder and inner core, form heat exchange layer, good effect of heat exchange not only, and the heat in upcast interchanger can not affect ambient temperature, also reduced the calorific loss of raw gas simultaneously;
(7) a kind of waste heat of coke oven crude gas recycling system of the present utility model, is provided with drain valve between the water outlet of heat exchanger package and the water-in of drum, can automatically discharge condensation water and air, prevents steam leakage, improves equipment work efficiency;
(8) a kind of waste heat of coke oven crude gas recycling system of the present utility model, between the water-in of its heat exchanger package and surge tank, be provided with accident circulating pipe, while avoiding recycle pump to break down, affect the heat exchange of upcast interchanger, be convenient to the inspection and maintenance of forced circulation pump;
(9) a kind of waste heat of coke oven crude gas recycling system of the present utility model, comprise coking clearing device, by inject high pressure air, promote high-temperature flue gas and tar to burn, thereby remove the coking in upcast interchanger, reduce production operation intensity, guarantee that the heat exchange efficiency of interchanger is stable;
(10) a kind of waste heat of coke oven crude gas recycling system of the present utility model, comprise air cooling device, when having a power failure, cutting off the water, pressurized air is sent to by the air intlet of upcast interchanger, at a high speed by discharging after interchanger, take amount of heat out of, guarantee normally to move at the in particular cases coke oven having a power failure, cut off the water.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of a kind of waste heat of coke oven crude gas recycling system of the present utility model;
Fig. 2 is upcast heat exchangers in parallel structural representation in the utility model;
Fig. 3 is the structural representation of upcast interchanger in the utility model.
Label declaration in schematic diagram:
1, heat exchanger package; 101, upcast interchanger; 1011, urceolus; 1012, middle cylinder; 1013, inner core; 1014, air intlet; 102, temperature measurer; 2, drum; 201, liquid level of steam drum meter; 202, loadometer; 3, vapour outlet; 4, drain valve; 5, forced circulation pump; 6, under meter; 7, surge tank; 701, water level meter; 8, small pump; 9, service pump; 10, desalination deoxygenation tank; 11, accident circulating pipe.
Embodiment
For further understanding content of the present utility model, in conjunction with the accompanying drawings and embodiments the utility model is described in detail.
Embodiment
In conjunction with Fig. 1, Fig. 2 and Fig. 3, a kind of waste heat of coke oven crude gas recycling system of the present embodiment, comprises the heat transferring medium recycle system, water charging system and detection Controlling System, wherein:
The heat transferring medium recycle system comprises heat exchanger package 1, drum 2 and forced circulation pump 5, the water-in of heat exchanger package 1 is connected with the water outlet of drum 2 by forced circulation pump 5, the water outlet of heat exchanger package 1 is connected with the water-in of drum 2, vapour outlet 3 on drum 2 is connected with extraneous steam pipe system, can force to promote heat transferring medium circulation, guarantee to produce incessantly steam, the rate of recovery can reach 30%, the steam being recovered to is incorporated to existing coking steam pipe system, utilized, reduced the energy consumption of coking process, assurance coke oven is long-term, safety, stably produce continuously, thereby recycle continuously the waste heat of raw gas.The effect of drum 2 is that hot water and steam that upcast interchanger 101 is produced collect, and by inner water separator, steam is separated with hot water, isolated hot water continues heat exchange, thereby cyclically water is become to steam.According to the particular case of coke oven, heat exchanger package 1 comprises several upcast interchanger 101, upcast interchanger 101 is by the independent pipeline female pipe of rear remittance parallel with one another (as shown in Figure 2), a plurality of upcast interchanger 101 parallel runnings, improved on the one hand heat exchange efficiency, also avoided on the other hand because single upcast interchanger 101 breaks down, and affected the normal operation of whole system, and can facilitate replacing or the maintenance of upcast interchanger 101.As shown in Figure 3, upcast interchanger 101 comprises urceolus 1011, middle cylinder 1012 and inner core 1013, between urceolus 1011 and middle cylinder 1012, form heat-insulating layer, between middle cylinder 1012 and inner core 1013, form heat exchange layer, the heat transferring medium of heat exchange layer is de-mineralized water, heat in not only good effect of heat exchange, and upcast interchanger 101 can not affect ambient temperature, has reduced the calorific loss of raw gas simultaneously yet.Upcast interchanger 101 is similar to shell and tube or plate-type heat exchanger, compare with traditional shell and tube or plate-type heat exchanger, have that small scale, function are many, stable, heatproof and rot-resistant advantage, in upcast interchanger 101, be provided with special, efficient heat exchanging pipe, improved heat exchange efficiency.
Water charging system comprises surge tank 7, small pump 8, service pump 9 and desalination deoxygenation tank 10, service pump 9 is arranged between surge tank 7 and desalination deoxygenation tank 10, surge tank 7 is connected with drum 2 by small pump 8, for supplementing, be converted into a part of water that steam re-uses, the normal safe operation of promotion equipment.
Detecting Controlling System comprises temperature measurer 102, is arranged at liquid level of steam drum meter 201, loadometer 202, the under meter 6 on drum 2 and is arranged at the water level meter 701 on surge tank 7, temperature measurer 102 is arranged at the water outlet of upcast interchanger 101, for measuring the medium temperature of upcast interchanger 101 water outlets; Loadometer 202 is connected with drum 2, for measuring the vapor pressure in drum 2; Under meter 6 is arranged between drum 2 and surge tank 7, for controlling the uninterrupted of small pump 8, detects Controlling System and can effectively detect Controlling System operation, guarantees that security of system normally moves, and reduces accident rate.
A kind of waste heat of coke oven crude gas recycling system of the present embodiment, is provided with drain valve 4 between the water outlet of heat exchanger package 1 and the water-in of drum 2, can automatically discharge condensation water and air, prevents steam leakage, improves equipment work efficiency.Between the water-in of heat exchanger package 1 and surge tank 7, be provided with accident circulating pipe 11, while avoiding recycle pump to break down, affect 101 heat exchange of upcast interchanger, be convenient to the inspection and maintenance of forced circulation pump 5.A kind of waste heat of coke oven crude gas recycling system of the present embodiment, also comprise coking clearing device and air cooling device, coking clearing device is positioned at the bottom of upcast interchanger 101, by inject high pressure air, promote high-temperature flue gas and tar to burn, thereby remove the coking in upcast interchanger 101, reduce production operation intensity, guarantee that the heat exchange efficiency of interchanger is stable; Air cooling device is connected with the air intlet 1014 on upcast interchanger 101, can guarantee having a power failure, cutting off the water in particular cases, pressurized air is sent to by the air intlet 1014 of upcast interchanger 101, at a high speed by discharging after interchanger, take amount of heat out of, guarantee that coke oven normally moves.
A kind of waste heat of coke oven crude gas recycling system of the present utility model, in the situation that draw the experience and lessons of each side, overcomes various disadvantages.For understanding better content of the present utility model, now provide principle of work of the present utility model: as shown in Figure 1, service pump 9 is squeezed into the de-mineralized water in desalination deoxygenation tank 10 in surge tank 7, the de-mineralized water height that water level meter 701 on surge tank 7 shows in tank, de-mineralized water enters in drum 2 through small pump 8 and under meter 6, under the effect of forced circulation pump 5 and drain valve 4, de-mineralized water circulates between drum 2 and heat exchanger package 1; After the heat exchange of de-mineralized water by heat exchanger package 1, enter drum 2 and carry out separation, steam flows out from vapour outlet 3, recycles, in hot water and the de-mineralized water circulation inflow heat exchanger package 1 from water charging system, proceed heat exchange, realize raw gas waste heat recovery incessantly.Meanwhile, be arranged at the coking clearing device of upcast interchanger 101 bottoms, constantly inject high pressure air, promotes high-temperature flue gas and tar to burn, thereby removes the coking in upcast interchanger 101.When there are the Special Circumstances that have a power failure, cut off the water, open air cooling device, pressurized air is sent to by the air intlet 1014 of upcast interchanger 101, at a high speed by discharging after interchanger, take amount of heat out of, guarantee that coke oven normally moves; When forced circulation pump 5 breaks down, enable accident circulating pipe 11, guarantee that coke oven runs well, and is convenient to the maintenance of forced circulation pump 5.
The transformation of a kind of waste heat of coke oven crude gas recycling system of the present utility model is simple and convenient, do not affect the normal running of coke oven, first water charging system, drum 2 and water pump etc. are in place, simultaneously according to the concrete Inlet and outlet water position of upcast interchanger 101, the water-in of all upcast interchanger 101, water outlet are reserved and put in place, according to practical situation, can to single interchanger, transform replacing one by one, and input coefficient operation one by one, until all transformation has been changed; Meanwhile, single upcast interchanger 101 can take out while breaking down at any time, does not affect the normal operation of whole system and coke oven.In addition, in a kind of waste heat of coke oven crude gas recycling system of the present utility model, some forced circulation pumps 5 can be set, wherein part is standby, when forced circulation pump 5 breaks down, can switch in time, guarantees the safe and stable operation of whole system; Select and there is valve, pump, instrument and auxiliary facility high temperature resistant, high pressure, improve the safety performance of whole system.What deserves to be explained is, a kind of waste heat of coke oven crude gas recycling system of the present utility model, wherein the heat transferring medium of upcast interchanger 101 can be selected nitrogen or air, and now, heat transferring medium seals and loops heat exchange between upcast interchanger 101 and air-water heat exchanger.A kind of waste heat of coke oven crude gas recycling system of the present utility model, both guaranteed heat transfer effect, reclaim reliably raw gas waste heat effectively, safely,, in can cyclically heat transferring medium being converted into again, low-pressure steam, fully recycle raw gas waste heat, can also effectively detect Controlling System operation simultaneously, guarantee that security of system normally moves, reduce accident rate.
Below schematically the utility model and embodiment thereof are described, this description does not have restricted, and shown in accompanying drawing is also one of embodiment of the present utility model, and actual structure is not limited to this.So, if those of ordinary skill in the art is enlightened by it, in the situation that not departing from the utility model creation aim, without the creationary frame mode similar to this technical scheme and the embodiment of designing, all should belong to protection domain of the present utility model.
Claims (8)
1. a waste heat of coke oven crude gas recycling system, is characterized in that: comprise the heat transferring medium recycle system and water charging system, wherein:
The described heat transferring medium recycle system comprises heat exchanger package (1), drum (2) and forced circulation pump (5), the water-in of described heat exchanger package (1) is connected with the water outlet of drum (2) by forced circulation pump (5), the water outlet of described heat exchanger package (1) is connected with the water-in of drum (2), and the vapour outlet (3) on described drum (2) is connected with extraneous steam pipe system;
Described water charging system comprises surge tank (7), small pump (8), service pump (9) and desalination deoxygenation tank (10), described service pump (9) is arranged between surge tank (7) and desalination deoxygenation tank (10), and described surge tank (7) is connected with drum (2) by small pump (8).
2. a kind of waste heat of coke oven crude gas recycling system according to claim 1, it is characterized in that: described heat exchanger package (1) comprises several upcast interchanger (101), described upcast interchanger (101) is by the female pipe of independent pipeline rear remittance parallel with one another.
3. a kind of waste heat of coke oven crude gas recycling system according to claim 2, it is characterized in that: also comprise detection Controlling System, described detection Controlling System comprises temperature measurer (102), is arranged at liquid level of steam drum meter (201), loadometer (202), the under meter (6) on drum (2) and is arranged at the water level meter (701) on surge tank (7), described temperature measurer (102) is arranged at the water outlet of upcast interchanger (101), for measuring the medium temperature of upcast interchanger (101) water outlet; Described loadometer (202) is connected with drum (2), for measuring the vapor pressure in drum (2); Described under meter (6) is arranged between drum (2) and surge tank (7), for controlling the uninterrupted of small pump (8).
4. according to a kind of waste heat of coke oven crude gas recycling system described in claim 2 or 3, it is characterized in that: described upcast interchanger (101) comprises urceolus (1011), middle cylinder (1012) and inner core (1013), between described urceolus (1011) and middle cylinder (1012), form heat-insulating layer, between described middle cylinder (1012) and inner core (1013), form heat exchange layer, the heat transferring medium of described heat exchange layer is de-mineralized water.
5. a kind of waste heat of coke oven crude gas recycling system according to claim 4, is characterized in that: between the water outlet of described heat exchanger package (1) and the water-in of drum (2), be provided with drain valve (4).
6. a kind of waste heat of coke oven crude gas recycling system according to claim 5, is characterized in that: between the water-in of described heat exchanger package (1) and surge tank (7), be provided with accident circulating pipe (11).
7. a kind of waste heat of coke oven crude gas recycling system according to claim 6, is characterized in that: also comprise coking clearing device, described coking clearing device is positioned at the bottom of upcast interchanger (101).
8. a kind of waste heat of coke oven crude gas recycling system according to claim 7, is characterized in that: also comprise air cooling device, described air cooling device is connected with the air intlet (1014) on upcast interchanger (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320537968.9U CN203530217U (en) | 2013-08-30 | 2013-08-30 | Raw coke oven gas waste heat recycling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320537968.9U CN203530217U (en) | 2013-08-30 | 2013-08-30 | Raw coke oven gas waste heat recycling system |
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| CN203530217U true CN203530217U (en) | 2014-04-09 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436271A (en) * | 2013-08-30 | 2013-12-11 | 常州江南电力节能科技有限公司 | System for recycling raw gas afterheat of coke oven |
| CN104132321A (en) * | 2014-08-20 | 2014-11-05 | 杨承诣 | Method for recycling and utilizing waste heat of raw coke oven gas |
| CN104266159A (en) * | 2014-09-29 | 2015-01-07 | 南京竣业过程机械设备有限公司 | Waste heat recovery technology for crude gas of novel coke oven |
| CN105255503A (en) * | 2015-09-30 | 2016-01-20 | 上海宝钢节能环保技术有限公司 | Coke oven crude gas sensible heat recycling system |
| CN108151547A (en) * | 2018-01-31 | 2018-06-12 | 济南冶金化工设备有限公司 | Recycling waste heat of coke oven crude gas is used to take off the device and method of benzene and ammonia still process |
-
2013
- 2013-08-30 CN CN201320537968.9U patent/CN203530217U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436271A (en) * | 2013-08-30 | 2013-12-11 | 常州江南电力节能科技有限公司 | System for recycling raw gas afterheat of coke oven |
| CN103436271B (en) * | 2013-08-30 | 2015-07-08 | 江苏龙冶节能科技有限公司 | System for recycling raw gas afterheat of coke oven |
| CN104132321A (en) * | 2014-08-20 | 2014-11-05 | 杨承诣 | Method for recycling and utilizing waste heat of raw coke oven gas |
| CN104266159A (en) * | 2014-09-29 | 2015-01-07 | 南京竣业过程机械设备有限公司 | Waste heat recovery technology for crude gas of novel coke oven |
| CN104266159B (en) * | 2014-09-29 | 2016-09-28 | 南京竣业过程机械设备有限公司 | A kind of waste heat of coke oven crude gas recovery process |
| CN105255503A (en) * | 2015-09-30 | 2016-01-20 | 上海宝钢节能环保技术有限公司 | Coke oven crude gas sensible heat recycling system |
| CN108151547A (en) * | 2018-01-31 | 2018-06-12 | 济南冶金化工设备有限公司 | Recycling waste heat of coke oven crude gas is used to take off the device and method of benzene and ammonia still process |
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Inventor after: Yi Xiaodong Inventor after: Gao Zhefa Inventor after: Li Deqing Inventor after: Meng Xiaodong Inventor before: Yi Xiaodong Inventor before: Gao Zhefa Inventor before: Han Pei Inventor before: Li Deqing Inventor before: Meng Xiaodong |
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Free format text: CORRECT: INVENTOR; FROM: YI XIAODONG GAO ZHEFA HAN PEI LI DEQING MENG XIAODONG TO: YI XIAODONG GAO ZHEFA LI DEQING MENG XIAODONG |
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Owner name: CHANGZHOU LONGYI ENERGY SAVING TECHNOLOGY CO., LTD Free format text: FORMER OWNER: CHANGZHOU JIANGNAN ELECTRIC POWER ENERGY SAVING SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20140516 |
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Effective date of registration: 20140516 Address after: 213000, No. 178, ERON South Road, bell tower Economic Zone, bell tower, Jiangsu, Changzhou Patentee after: Changzhou Dragon Energy Saving Technology Co.,Ltd. Address before: 213000, Jiangsu Changzhou bell tower Zone Economic Development Zone, ERON South Road, No. 213 bell tower, hi tech Innovation Service Center No. 8933 Patentee before: CHANGZHOU JIANGNAN ELECTRIC POWER ENERGY-SAVING TECHNOLOGY CO.,LTD. |
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Owner name: JIANGSU LONGYE ENERGY SAVING TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CHANGZHOU LONGYI ENERGY SAVING TECHNOLOGY CO., LTD. Effective date: 20141010 |
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Effective date of registration: 20141010 Address after: 213000, 5A08, No. 178, ERON South Road, Changzhou bell tower Economic Zone, Changzhou, Jiangsu Patentee after: JIANGSU LONGYE ENERGY SAVING TECHNOLOGY Co.,Ltd. Address before: 213000, No. 178, ERON South Road, bell tower Economic Zone, bell tower, Jiangsu, Changzhou Patentee before: Changzhou Dragon Energy Saving Technology Co.,Ltd. |
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Granted publication date: 20140409 |