CN202993898U - Steam-water system of thermal power plant - Google Patents
Steam-water system of thermal power plant Download PDFInfo
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- CN202993898U CN202993898U CN 201220713694 CN201220713694U CN202993898U CN 202993898 U CN202993898 U CN 202993898U CN 201220713694 CN201220713694 CN 201220713694 CN 201220713694 U CN201220713694 U CN 201220713694U CN 202993898 U CN202993898 U CN 202993898U
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- boiler
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Abstract
The utility model discloses a steam-water system of a thermal power plant. The steam-water system comprises a boiler, a turbine with a steam outlet, a condenser with a steam inlet and a preheating heat exchanger for preheating water conveyed to the boiler. The preheating heat exchanger is provided with a steam channel allowing dead steam to pass and a liquid channel allowing water conveyed to the boiler to pass. The steam channel is provided with a steam inlet and a steam outlet. The steam inlet of the steam channel is communicated with the steam outlet of the turbine. The steam outlet of the steam channel is communicated with the steam inlet of the condenser. All dead steam discharged from the steam outlet of the steam channel of the preheating heat exchanger enters the condenser and is converted into condensed water, and the condensed water is preheated by the preheating heat exchanger and then conveyed to the boiler. Due to the fact that all dead steam discharged from the steam outlet of the steam channel of the preheating heat exchanger enters the condenser and is cooled by the same, the condensed water conveyed to the boiler does not contain a large amount of gas, work load of equipment for subsequent gas removing of the condensed water is reduced effectively, and the service life of the steam-water system is prolonged.
Description
Technical field
The utility model belongs to the Power Plant Equipment technical field, is specifically related to a kind of thermal power plant boiler circuit.
Background technology
The boiler circuit in thermal power plant mainly comprises boiler, steam turbine, condenser, condensate pump, low-pressure heater, high-pressure heater, feed pump, water is heated in boiler and is converted into high temperature and high pressure steam, high temperature and high pressure steam enters in steam turbine by pipeline, and discharge from the gas outlet of steam turbine, due to the continuous expansion of steam, the blade rotation of swiftly flowing Steam Actuation steam turbine is to drive generator work.The exhaust steam that discharge the gas outlet of steam turbine enters in condenser through pipeline, exhaust steam becomes condensate water and discharges from the liquid outlet of condenser after the condenser cooling down, condensate water is pumped to low-pressure heater by condensate pump, be pumped to high-pressure heater by feed pump again after the low-pressure heater heating, get back in boiler after the high-pressure heater heat treated, again be converted into again high temperature and high pressure steam by the boiler heating, beginning next round steam/water circulating.Existing condenser can be divided into supporting air-cooled condenser and the supporting water-cooled condenser that is provided with cooling water pump, cooling tower that is provided with cooling blower, Air-Cooling Island according to the different types of cooling, but be that air-cooled condenser or water-cooled condenser all need to support the use the very large heat-exchange device of volume such as Air-Cooling Island, cooling tower etc., make so on the one hand the investment of thermoelectricity field device very high, the entrained heat of exhaust steam rejects heat to a large amount of heat energy of waste in atmosphere through condenser on the other hand.
for in the Chinese utility model patent of CN202195715U, a kind of power plant boiler circuit is disclosed at Granted publication number, comprise the boiler that connects successively by pipeline, steam turbine, condenser, condensate pump, low-pressure heater, oxygen-eliminating device, feed pump and high-pressure heater, wherein, be provided with exhaust steam and draw pipeline on the connecting line of steam turbine and condenser, exhaust steam is drawn pipeline and is connected with as the heat pump that is used for condensate water is carried out the preheating heat exchanger of preheating, heat pump comprises evaporimeter, compressor and condenser, evaporimeter, compressor is connected pipeline with condenser and connects successively, the import of evaporimeter is drawn pipeline with exhaust steam and is connected, the port of export of evaporimeter is connected with the port of export of condenser by pipeline, the inlet of condenser is communicated with the delivery port of condensate pump by the condensate water intake line, the liquid outlet of condenser is connected with the arrival end of low-pressure heater by the condensate water output pipe, be provided with force (forcing) pump on the condensate water output pipe.During heat pump work, a part of exhaust steam that discharge the steam turbine gas outlet enters in condenser, discharge from the liquid outlet of condenser by becoming condensate water after the condenser cooling down, another part exhaust steam is drawn pipeline through exhaust steam and is entered evaporimeter and carry out heat exchange, heat discharges to condensate water by condenser, thereby improved the condensing water temperature of low-pressure heater porch, thereby condensate water has been carried out preheating.
The condensate water of above-mentioned thermal power plant boiler circuit is after the liquid outlet from condenser flows out, need to flow in the water treatment system that is consisted of by devices such as low-pressure heater, high-pressure heater, oxygen-eliminating device and feed pumps, the a large amount of gases that contain in need to removing condensate water by each device in water treatment system in the condensate water heat temperature raising impact boiler with the gas of avoiding containing in condensed water in high temperature.But the outlet of the preheating heat exchanger in above-mentioned boiler circuit directly is communicated with the liquid outlet of condenser, the fluid of discharging from the exit of preheating heat exchanger like this is without the condenser cooling processing, fluid is gas or the gas-liquid mixture that contains a large amount of gases, the a large amount of gases that contain in fluid can increase the work load of each device removing gas in water treatment system, shorten the service life of device.
The utility model content
The purpose of this utility model is to provide a kind of thermal power plant boiler circuit, and the fluid that contains a large amount of gases of discharging with the outlet that solves preheating heat exchanger in prior art directly enters the technical problem that water treatment system can increase the work load of each device removing gas in water treatment system.
For achieving the above object, the technical scheme of thermal power plant provided by the utility model boiler circuit is: thermal power plant's boiler circuit, comprise boiler, have exhaust outlet steam turbine, have the condenser of air inlet and be used for the preheating heat exchanger that carries out preheating to the water of boiler to carrying, preheating heat exchanger has for the gas circuit of passing through for exhaust steam with for carrying the liquid road of passing through to the water of boiler, gas circuit has air inlet and gas outlet, the air inlet of gas circuit is communicated with the exhaust outlet of steam turbine, and the gas outlet of described gas circuit is communicated with the air inlet of condenser.
Described preheating heat exchanger comprises one or at least two heat exchanger that is cascaded, heat exchanger comprises housing, offer air inlet, gas outlet, inlet and liquid outlet on housing, liquid inlet and outlet on housing is communicated with by the fluid pipeline that is arranged in housing, is leaving the cavity that is communicated with inlet, outlet on housing between housing and fluid pipeline.
Described condenser has liquid outlet, the liquid outlet that the liquid road of described preheating heat exchanger has inlet and is communicated with described boiler, and the inlet on described liquid road is communicated with the liquid outlet of condenser.
The liquid outlet on the liquid road of described preheating heat exchanger is by pipeline and flow to from preheating heat exchanger oxygen-eliminating device, feed pump and the high-pressure heater that the flow direction of boiler is serially connected on pipeline successively according to fluid and be communicated with boiler.
Offer the moisturizing inlet on described oxygen-eliminating device, be serially connected with water charging system on this moisturizing inlet, water charging system comprises the water pipe that is communicated with the moisturizing inlet of oxygen-eliminating device, is serially connected with on water pipe for the water that replenishes is softened pretreated softening treatment facility.
Described condenser is supporting air-cooled condenser or the supporting water-cooled condenser that is provided with cooling water pump that is provided with cooling blower, and described cooling blower or cooling water pump control are by the Frequency Converter Control that is used for just controlling according to air inlet place's exhaust steam temperature of condenser cooling blower or cooling water pump power output size.
the beneficial effects of the utility model are: the exhaust outlet of the steam turbine of thermal power plant provided by the utility model boiler circuit is communicated with the air inlet by gas circuit in preheating heat exchanger, the gas outlet of gas circuit is communicated with the air inlet of condenser, during use, the boiler heating produces high temperature and high pressure steam, high temperature and high pressure steam enters the acting of expanding in steam turbine and rotates with pushing turbine, the exhaust outlet output exhaust steam of steam turbine, exhaust steam enters in the gas circuit of preheating heat exchanger, exhaust steam in the preheating heat parallel operation with the liquid road of preheating heat exchanger in the conveying flow through carry out heat exchange to the water of boiler, thereby the water in the liquid road is carried out preheating, exhaust steam is being discharged from the gas outlet of gas circuit air inlet by condenser enters condenser, by condenser, cooling down is carried out in exhaust steam and exhaust steam is converted into for delivery of the condensate water to boiler, the exhaust steam of discharging from the gas outlet of preheating heat exchanger all enters and is converted into condensate water condenser, condensate water flows to boiler again through after the pre-heat treatment of preheating heat exchanger.Because the exhaust steam of discharging from the gas outlet of the gas circuit of pre-heat exchanger all enters condenser, by condenser, it is carried out cooling down, the condensate water that flows to like this boiler can not contain a large amount of gases, effectively reduce the work load that condensate water is carried out the device of follow-up removing gas, service life extended period.The exhaust steam of discharging from the exhaust outlet of steam turbine enters preheating heat exchanger, carries out heat exchange with the water that enters in preheating heat exchanger, has effectively utilized the heat of exhaust steam itself to carry out preheating, realizes the recycling to the exhaust steam heat.
Description of drawings
Fig. 1 is the structural representation (in figure, arrow is depicted as fluid flow direction in corresponding pipeline) of a kind of embodiment of thermal power plant's boiler circuit provided by the utility model.
The specific embodiment
As shown in Figure 1, the embodiment of a kind of thermal power plant boiler circuit, boiler circuit in this embodiment comprises boiler 7, be used for the steam turbine 8, preheating heat exchanger 3, cooling system 1 and the water treatment system 4 that are in transmission connection with generator 9, the gas outlet of boiler 7 is communicated with the air inlet of steam turbine 8, and the exhaust outlet of the discharge exhaust steam of steam turbine 8 is communicated with the preheating heat exchanger 3 that is used for conveying is carried out preheating to the condensate water of boiler.Described preheating heat exchanger 3 has for the gas circuit of passing through for exhaust steam with for carrying the liquid road of passing through to the water of boiler, and gas circuit has air inlet and gas outlet, and the liquid road has inlet and liquid outlet, and the air inlet of gas circuit is communicated with the exhaust outlet of steam turbine.Described cooling system 1 comprise condenser 11 with air inlet and leakage fluid dram and with the matching used cooling tower 12 of condenser and cooling water pump 13.Described water treatment system 4 comprises the pipeline that is communicated with the water inlet of boiler 7 and is serially connected in successively oxygen-eliminating device 41, feed pump 42 and high-pressure heater 43 on pipeline along the flow direction of fluid in pipeline, unlike the prior art be: the exhaust outlet of steam turbine 8 is communicated with condenser 11 by the gas circuit in preheating heat exchanger 3, wherein, the exhaust outlet of steam turbine 8 is communicated with the air inlet of the gas circuit of preheating heat exchanger 3, and the gas outlet of the gas circuit of preheating heat exchanger 3 is communicated with the air inlet of condenser 11.In addition, 11, condenser in the cooling system 1 liquid road in preheating heat exchanger 3 is communicated with water treatment system 4, wherein, the liquid outlet of condenser 11 is communicated with through the inlet on the liquid road of pipeline and the water circulating pump 2 that is serially connected in pipeline and preheating heat exchanger 3, and the liquid outlet on the liquid road of preheating heat exchanger 3 is communicated with the inlet of water treatment system 4.
In the present embodiment, preheating heat exchanger 3 comprises one-level heat exchanger 31 and the two-stage heat exchanger 32 that is chained together, the structure of two heat-exchanger is identical, one-level heat exchanger 31 comprises housing, housing is provided with air inlet, gas outlet, inlet and liquid outlet, liquid inlet and outlet on housing is communicated with by the fluid pipeline that is arranged in housing, is leaving the cavity that is communicated with inlet, outlet on housing between housing and fluid pipeline.herein, the air inlet of one-level heat exchanger 31 is communicated with the exhaust outlet of steam turbine 8 as the air inlet of gas circuit in preheating heat exchanger 3, the gas outlet of one-level heat exchanger 31 is communicated with by the air inlet of pipeline with two-stage heat exchanger 32, the gas outlet of two-stage heat exchanger 32 is communicated with the air inlet of condenser 11 as the gas outlet of gas circuit in preheating heat exchanger 3, the inlet of two-stage heat exchanger 32 is communicated with the liquid outlet of condenser 11 as the inlet on liquid road in preheating heat exchanger 3, the liquid outlet of two-stage heat exchanger 32 is communicated with the inlet of one-level heat exchanger 31, the liquid outlet of one-level heat exchanger 31 is communicated with the inlet of water treatment system 4 as the liquid outlet on liquid road in preheating heat exchanger 3.
In the present embodiment, the fluid flow direction in water treatment system is that fluid flows to the flow direction of boiler from preheating heat exchanger.Consider loss of steam and water in whole boiler circuit, in the present embodiment, also be serially connected with water charging system 5 on oxygen-eliminating device 41, this water charging system 5 comprises the water pipe 52 that the moisturizing inlet that is provided with oxygen-eliminating device is communicated with, for guaranteeing that moisturizing meets the circulating water quality requirement, be serially connected with on water pipe 52 for the water that replenishes is softened pretreated softening treatment facility 51.
In the present embodiment, condenser 11 is the supporting water-cooled condenser that is provided with cooling water pump 13, for reaching energy-saving and cost-reducing purpose, cooling water pump 13 is by control the Frequency Converter Control of cooling water pump power output size according to air inlet place's exhaust steam temperature height of condenser.When air inlet place's exhaust steam temperature of condenser was higher, Frequency Converter Control cooling water pump power output was larger, the normal operation of guarantee condenser.And when the exhaust outlet of steam turbine was low through the exhaust steam temperature at the air inlet place that enters condenser after the heat exchange of preheating heat exchanger, frequency converter can be controlled the normal operation that the less power of cooling water pump output can guarantee condenser.
when above-mentioned thermal power plant boiler circuit is worked, the high temperature and high pressure steam that discharge the gas outlet of boiler 7 enters into steam turbine 8 by the air inlet of pipeline and steam turbine 8, high temperature and high pressure steam expands in steam turbine after acting, becoming exhaust steam discharges from the exhaust outlet of steam turbine 8, the air inlet of exhaust steam gas circuit in pipeline and preheating heat exchanger enters in preheating heat exchanger 3, condensate water exhaust steam enters preheating heat exchanger with the inlet on liquid road in preheating heat exchanger in preheating heat exchanger 3 in is carried out heat exchange, then exhaust steam enters in condenser 11 through the air inlet of pipeline and condenser through the gas outlet of the gas circuit of preheating heat exchanger 3, exhaust steam becomes condensate water and discharges from the liquid outlet of condenser 11 under the cooling down effect of condenser 11, the condensate water of discharging from the liquid outlet of condenser 11 is during the inlet on liquid road enters preheating heat exchanger through preheating heat exchanger 3 under the pump action of water circulating pump 2, the condensate water that enters preheating heat exchanger 3 is carried out heat exchange with the high temperature exhaust steam that enters in preheating heat exchanger in preheating heat exchanger, discharge and flow to water treatment system 4 through the condensate water after preheating from the liquid outlet on the liquid road of preheating heat exchanger 3, through oxygen-eliminating device 41, feed pump 42, after the processing of high-pressure heater 43, enter in boiler 7, then thermal conversion is that high temperature and high pressure steam restarts new circulation in boiler 7, thereby driving steam turbine 8 rotates, drive generating moving 9 by steam turbine 8 and work to produce electric power.
In the present embodiment, the exhaust steam of discharging from the exhaust outlet of steam turbine 11 all enters preheating heat exchanger 3, carry out heat exchange with the condensate water that enters in preheating heat exchanger 3, thereby effectively utilized the heat of exhaust steam itself to carry out preheating to condensate water, the recycling of realization to the exhaust steam heat, simultaneously, can also effectively reduce the energy consumption of heat-setting water.Simultaneously, all enter condenser 11 from the gas outlet exhaust steam out of preheating heat exchanger 3, by condenser 11, exhaust steam is reduced and be converted into condensate water, because the temperature of the exhaust steam after processing through preheating heat exchanger 3 reduces greatly, like this, what the required supporting cooling tower 12 of condenser 11 just can be done herein is smaller, can effectively reduce investment and the floor space of cooling tower.
In the present embodiment, heat-exchange device comprises two two heat exchangers that are cascaded, in other embodiments, and a plurality of heat exchangers that heat-exchange device also can adopt a heat exchanger or be cascaded.
In the present embodiment, preheating heat exchanger only carries out preheating to the condensate water of discharging from the liquid outlet of condenser, in other embodiments, also the inlet on the liquid road of water pipe and preheating heat exchanger can be connected in series, carry out the pre-heat treatment through preheating heat exchanger by water pipe equally to the water that flows to boiler like this, thereby reach energy-saving and cost-reducing purpose.
In the present embodiment, preheating heat exchanger comprises heat exchanger, in other embodiments, heat-exchange device also can adopt evaporimeter, compressor and the condenser of heat-exchange device of the prior art as linking together by pipeline, have the air inlet that is connected with the exhaust outlet of steam turbine and the gas outlet that is communicated with the air inlet of condenser on evaporimeter, have the inlet that is communicated with the liquid outlet of condenser and the liquid outlet that is communicated with the inlet of water treatment system on condenser.
In the present embodiment, water treatment system advances to comprise oxygen-eliminating device, feed pump and high-pressure heater, because the preheating heat exchanger that adopts compared with prior art gets up, water treatment system has been saved low-pressure heater, can reduce input cost herein.
In the present embodiment, with the supporting cold water pump of condenser by Frequency Converter Control to reach energy-saving and cost-reducing purpose.In other embodiments, also can not use frequency converter.
In the present embodiment, condenser is the supporting water-cooled condenser that is connected with cooling tower and cooling water pump, and in other embodiments, condenser also can be the supporting air-cooled condenser that is connected with Air-Cooling Island and cooling blower.Same, if adopt air-cooled condenser, cooling blower can be by control the Frequency Converter Control of cooling water pump power output size according to air inlet place's exhaust steam temperature height of condenser, to reach energy-saving and cost-reducing purpose.
Claims (6)
1. thermal power plant's boiler circuit, comprise boiler, have exhaust outlet steam turbine, have the condenser of air inlet and be used for the preheating heat exchanger that carries out preheating to the water of boiler to carrying, preheating heat exchanger has for the gas circuit of passing through for exhaust steam with for carrying the liquid road of passing through to the water of boiler, gas circuit has air inlet and gas outlet, the air inlet of gas circuit is communicated with the exhaust outlet of steam turbine, it is characterized in that: the gas outlet of described gas circuit is communicated with the air inlet of condenser.
2. thermal power plant according to claim 1 boiler circuit, it is characterized in that: described preheating heat exchanger comprises one or at least two heat exchanger that is cascaded, heat exchanger comprises housing, offer air inlet, gas outlet, inlet and liquid outlet on housing, liquid inlet and outlet on housing is communicated with by the fluid pipeline that is arranged in housing, is leaving the cavity that is communicated with inlet, outlet on housing between housing and fluid pipeline.
3. thermal power plant according to claim 1 and 2 boiler circuit, it is characterized in that: described condenser has liquid outlet, the liquid outlet that the liquid road of described preheating heat exchanger has inlet and is communicated with described boiler, the inlet on described liquid road is communicated with the liquid outlet of condenser.
4. thermal power plant according to claim 3 boiler circuit is characterized in that: the liquid outlet on the liquid road of described preheating heat exchanger is by pipeline and flow to from preheating heat exchanger oxygen-eliminating device, feed pump and the high-pressure heater that the flow direction of boiler is serially connected on pipeline successively according to fluid and be communicated with boiler.
5. thermal power plant according to claim 4 boiler circuit, it is characterized in that: offer the moisturizing inlet on described oxygen-eliminating device, be serially connected with water charging system on this moisturizing inlet, water charging system comprises the water pipe that is communicated with the moisturizing inlet of oxygen-eliminating device, is serially connected with on water pipe for the water that replenishes is softened pretreated softening treatment facility.
6. thermal power plant according to claim 1 and 2 boiler circuit, it is characterized in that: described condenser is supporting air-cooled condenser or the supporting water-cooled condenser that is provided with cooling water pump that is provided with cooling blower, and described cooling blower or cooling water pump control are by the Frequency Converter Control that is used for just controlling according to air inlet place's exhaust steam temperature of condenser cooling blower or cooling water pump power output size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220713694 CN202993898U (en) | 2012-12-21 | 2012-12-21 | Steam-water system of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220713694 CN202993898U (en) | 2012-12-21 | 2012-12-21 | Steam-water system of thermal power plant |
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| CN202993898U true CN202993898U (en) | 2013-06-12 |
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| CN 201220713694 Expired - Fee Related CN202993898U (en) | 2012-12-21 | 2012-12-21 | Steam-water system of thermal power plant |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705021A (en) * | 2017-03-09 | 2017-05-24 | 乌海黑猫炭黑有限责任公司 | Device for recycling cooling water of carbon black exhaust gas boiler draught fans and rubber ball cleaning discharged water |
| CN108351098A (en) * | 2015-11-05 | 2018-07-31 | 株式会社东芝 | Vapor recovery method in vapor recovery system, thermal power generation system and power generation exhaust gas in power generation exhaust gas |
| CN108844378A (en) * | 2018-05-17 | 2018-11-20 | 广州发展环保建材有限公司 | Steam exhaust liquefaction processing system |
| CN109339877A (en) * | 2018-10-25 | 2019-02-15 | 中国能源建设集团陕西省电力设计院有限公司 | A kind of coal base distributing-supplying-energy system |
| CN109519241A (en) * | 2017-09-19 | 2019-03-26 | 株式会社东芝 | Heat generating system |
| CN111512096A (en) * | 2017-12-22 | 2020-08-07 | 乔瓦尼·达里恩 | Cogeneration system for boiler |
-
2012
- 2012-12-21 CN CN 201220713694 patent/CN202993898U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108351098A (en) * | 2015-11-05 | 2018-07-31 | 株式会社东芝 | Vapor recovery method in vapor recovery system, thermal power generation system and power generation exhaust gas in power generation exhaust gas |
| CN106705021A (en) * | 2017-03-09 | 2017-05-24 | 乌海黑猫炭黑有限责任公司 | Device for recycling cooling water of carbon black exhaust gas boiler draught fans and rubber ball cleaning discharged water |
| CN109519241A (en) * | 2017-09-19 | 2019-03-26 | 株式会社东芝 | Heat generating system |
| CN111512096A (en) * | 2017-12-22 | 2020-08-07 | 乔瓦尼·达里恩 | Cogeneration system for boiler |
| CN111512096B (en) * | 2017-12-22 | 2022-03-29 | 乔瓦尼·达里恩 | Cogeneration system for boiler |
| CN108844378A (en) * | 2018-05-17 | 2018-11-20 | 广州发展环保建材有限公司 | Steam exhaust liquefaction processing system |
| CN109339877A (en) * | 2018-10-25 | 2019-02-15 | 中国能源建设集团陕西省电力设计院有限公司 | A kind of coal base distributing-supplying-energy system |
| CN109339877B (en) * | 2018-10-25 | 2021-07-30 | 中国能源建设集团陕西省电力设计院有限公司 | Coal-based distributed energy supply system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161013 Address after: 451191 Longhu Town, Xinzheng City, Henan Province, 107 National Road, Zhengzhou University Science Park of Zhongyuan University of Technology Patentee after: Henan Sino Swiss Refrigeration Technology Co., Ltd. Address before: 450000, 3 South Street, Nanyang Road, Henan, Zhengzhou Patentee before: Li Shuming |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20181221 |