CN205560803U - Low -grade heat recovery economizer system during smoke pollutants of thermal power plant handles - Google Patents
Low -grade heat recovery economizer system during smoke pollutants of thermal power plant handles Download PDFInfo
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- CN205560803U CN205560803U CN201620003936.4U CN201620003936U CN205560803U CN 205560803 U CN205560803 U CN 205560803U CN 201620003936 U CN201620003936 U CN 201620003936U CN 205560803 U CN205560803 U CN 205560803U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model provides a low -grade heat recovery economizer system during smoke pollutants of thermal power plant handles, including gas cooler, flue gas re -heater, flue gas auxiliary heater still is equipped with the energy -conserving branch road of retrieving the low -grade heat energy of thermal power plant between gas cooler and the flue gas re -heater, and energy -conserving is equipped with first kind absorption heat pump and water water heat exchanger on the road, and wherein, first kind absorption heat pump includes: the absorber, condenser, evaporimeter, generator. The utility model provides a low -grade heat recovery economizer system during smoke pollutants of thermal power plant handles, can guarantee that smoke pollutants processing system keeps under the circumstances of steady operation, the original flue gas cooler is used for the condensate water with heating boiler, reduce the coal consumption, and utilize water water heat exchanger to cooperate first kind absorption heat pump, the medium water that low -grade heat energy in the effective recycling circulating water came out with heating flue gas heater, saves water resource, improve the comprehensive energy utilization of pollutant processing system operation.
Description
Technical field
The utility model relates to thermal power plant's pollutant disposal system, and the low grade heat energy during a kind of coal steam-electric plant smoke pollutant processes reclaims energy conserving system.
Background technology
Along with China's raising to fossil-fuel power plant atmospheric pollutant emission standard, all newly-built, be required for using advanced flue gas cleaning draining technology to realize the minimum discharge of atmosphere pollution with active service fired power generating unit building.According to existing technical merit, flue gas pollutant based on flue gas cooling with thermal technology again is worked in coordination with process technique and is acknowledged as realizing the main technological route of coal-burning power plant's minimum discharge.
Its operation principle is, flue gas cooling and again thermal technology include two air-water heat exchangers, one is gas cooler, it is usually located on the flue between air preheater and electrostatic precipitator, flue gas heat is absorbed to reduce flue-gas temperature, it is therefore an objective to reduce flue-gas temperature to reduce flue gas volume flow, to reduce fan energy consumption, raising ESP Efficiency and sulfur trioxide removal efficiency by WATER AS FLOW MEDIUM；Another is that smoke re-heater is also referred to as flue gas heater, it is usually located on the flue between wet desulphurization device or wet electrical dust precipitator device and chimney, in this heat exchanger, cold flue gas after the high-temperature medium water discharged with gas cooler adds thermally desulfurizing or after wet dedusting, by improving flue-gas temperature to improve atmosphere hoist height, to reduce chimney corrosion and the generation of " white cigarette ", after high-temperature medium water heat release, temperature reduces, return gas cooler and absorb the heat in high-temperature flue gas, it is achieved the interior circulation of hot media and the transmission of flue gas heat.
The idiographic flow that flue gas pollutant based on flue gas cooling with thermal technology again works in coordination with process technique is: enter the flue-gas temperature of gas cooler at about 130 DEG C, in gas cooler, about 90 DEG C it are cooled to by the WATER AS FLOW MEDIUM of about 70 DEG C, WATER AS FLOW MEDIUM temperature rises to about 100 DEG C, the flue gas of about 90 DEG C enters electrostatic precipitator, wet desulphurization device, smoke re-heater is entered after temperature is further reduced to about 50 DEG C after wet electrical dust precipitator device, in smoke re-heater, after the WATER AS FLOW MEDIUM heat release of about 100 DEG C, temperature is down to about 70 DEG C and is pressurized and is pumped back to gas cooler, and the heat of the smoke absorption WATER AS FLOW MEDIUM release of about 50 DEG C passes through smoke stack emission after being warming up to about 80 DEG C.
When fired power generating unit oepration at full load, the exhaust gas temperature owing to flowing out from air preheater is higher at 130 DEG C, and the heat that gas cooler absorbs disclosure satisfy that the heat needed for flue gas reheat heat exchanger.When fired power generating unit is in oepration at full load but in the winter time etc. flow out that exhaust gas temperature is relatively low from air preheater under climatic environment or fired power generating unit cause flowing out exhaust gas temperature from air preheater in non-oepration at full load relatively low and time exhaust gas volumn reduces, owing to the flue gas exit temperature of gas cooler and smoke re-heater needs to maintain the state close with time at full capacity, therefore the heat that gas cooler obtains can not meet the needs of smoke re-heater, now typically require supplementary a certain amount of, the heat medium water that the steam heating gas cooler of certain parameter flows out, to guarantee that the flue-gas temperature that smoke re-heater exports reaches about 80 DEG C.According to the practical operating experiences of the fired power generating unit that puts into operation, when fired power generating unit load is the lowest, required supplementary quantity of steam is the most, and the energy consumption of flue gas minimum discharge processing system is bigger.As a example by 600MW fired power generating unit, when unit runs under 75%, 50% and 35% load, the heat that need to supplement is respectively 1800kW, 9000kW and 9800kW.The consumption of steam is that flue gas pollutant based on flue gas cooling and thermal technology again works in coordination with one of main energy consumption processing technique, and the most how reducing energy consumption based on flue gas cooling and the coal steam-electric plant smoke pollutant disposal system of thermal technology again is one of main difficult technical of facing of Present Thermal Power factory.
Utility model content
For the problems referred to above, the low grade heat energy that the utility model provides during a kind of coal steam-electric plant smoke pollutant processes reclaims energy conserving system, for reducing energy consumption and the unit generation coal consumption of coal steam-electric plant smoke pollutant disposal system.
The technical solution adopted in the utility model is, low grade heat energy during a kind of coal steam-electric plant smoke pollutant processes reclaims energy conserving system, air preheater that said system includes being sequentially connected, gas cooler, electrostatic precipitator, desulfurizing tower, wet electrical dust precipitator, smoke re-heater, chimney.
The inlet and outlet of above-mentioned gas cooler adding system low with boiler is connected.
The WATER AS FLOW MEDIUM circulatory system pipeline of above-mentioned smoke re-heater is provided with WATER AS FLOW MEDIUM booster pump, water water-to-water heat exchanger, heat pump, recirculated water booster pump, flue gas auxiliary heater.
Above-mentioned heat pump includes the following:
Absorber, its inlet ductwork exports with the WATER AS FLOW MEDIUM of smoke re-heater and communicates, and is additionally provided with the water water-to-water heat exchanger reducing WATER AS FLOW MEDIUM temperature in its inlet ductwork；
Condenser, its outlet communicates with the inlet tube of flue gas auxiliary heater；
Evaporimeter, the pipeline before its inlet tube cools down with thermal power plant's open type or closed-type circulating cooling water system communicates, and the pipeline after its outlet cools down with thermal power plant's open cycle cooling water system or closed circle water system communicates；
Generator, its inlet tube communicates with thermal power plant Auxiliary Steam, and its outlet communicates with the draining system of thermal power plant.
Further, the inlet tube of above-mentioned evaporimeter is additionally provided with recirculated water booster pump.
Further, the inlet tube of above-mentioned absorber is additionally provided with absorber inlet valve.
Further, the outlet of above-mentioned condenser is provided with condenser out valve.
Further, the outlet of above-mentioned flue gas auxiliary heater pipeline with generator by being provided with drain valve communicates.
Further, above-mentioned thermal power plant Auxiliary Steam is connected with flue gas auxiliary heater by being provided with the arm of flue gas auxiliary heater stop valve, and above-mentioned arm is arranged in parallel with the inlet tube of generator.
Further, the inlet tube of above-mentioned generator is additionally provided with steam of generator stop valve.
Further, or the inlet ductwork of above-mentioned absorber directly can export with the WATER AS FLOW MEDIUM of smoke re-heater and communicate.
Further, the above-mentioned WATER AS FLOW MEDIUM circulatory system also includes moisturizing waste removal equipment.
Further, the low adding system of above-mentioned boiler is to use steam turbine low-pressure to draw gas to heat the heat-exchange system of low-temperature condensate.
Compared with prior art, low grade heat energy during a kind of coal steam-electric plant smoke pollutant provided by the utility model processes reclaims energy conserving system, on the basis of the cooling of existing flue gas with the flue gas pollutant processing system of thermal technology again, middle gas cooler and smoke re-heater are disconnected, gas cooler is mainly used in heating boiler and condenses water, reduce and low add the amount of drawing gas, reduce gross coal consumption rate, energy-conservation branch road is set up in smoke re-heater side, the low grade heat energy in recirculated water can be reclaimed, decrease the loss of recirculated water, saving water resource, it is substantially reduced energy consumption and operation cost that pollutant disposal system runs.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present utility model.
In figure, 1, air preheater；2, gas cooler；3, electrostatic precipitator；4, desulfurizing tower；5, WATER AS FLOW MEDIUM booster pump；6, wet electrical dust precipitator；7, smoke re-heater；8, chimney；9, flue gas auxiliary heater；10, first class lithium bromide absorptive heat pump；11, water water-to-water heat exchanger；12, recirculated water booster pump.
Detailed description of the invention
Elaborate a lot of detail in the following description so that fully understanding the utility model.But the utility model can be implemented to be much different from alternate manner described here, those skilled in the art can do similar popularization in the case of the utility model intension, and therefore the utility model is not limited by following public specific embodiment.
Below in conjunction with the accompanying drawings and embodiment, detailed description of the invention of the present utility model is described further.
Embodiment
1
In the present embodiment, in conjunction with accompanying drawing, structure of the present utility model is described in detail.
Refer to accompanying drawing, low grade heat energy during a kind of coal steam-electric plant smoke pollutant processes reclaims energy conserving system, air preheater 1 that system includes being sequentially connected, gas cooler 2, electrostatic precipitator 3, desulfurizing tower 4, wet electrical dust precipitator 6, smoke re-heater 7, chimney 8.Independently run between described gas cooler 2 and smoke re-heater 7, described smoke re-heater 7 outlet is additionally provided with the energy-conservation branch road reclaiming thermal power plant's low grade heat energy, it is additionally provided with flue gas auxiliary heater 9 in smoke re-heater 7 import, the effect of flue gas auxiliary heater 9 is when the water temperature of heat pump heating system outlet can not meet the water temperature demand of smoke re-heater 7 import or during heat pump energy-conserving branch road repair and maintenance, supplements steam heating media water.
The inlet and outlet of gas cooler 2 adding system low with boiler is connected.
The WATER AS FLOW MEDIUM circulatory system pipeline of smoke re-heater 7 is provided with WATER AS FLOW MEDIUM booster pump 5, water water-to-water heat exchanger 11, heat pump 10, recirculated water booster pump 12, flue gas auxiliary heater 9.
Heat pump includes the following:
Absorber 10-1, its inlet ductwork exports with the WATER AS FLOW MEDIUM of smoke re-heater 7 and communicates, and in system, the WATER AS FLOW MEDIUM used is usually the demineralized water of thermal power plant；And in its inlet ductwork, it is additionally provided with the water water-to-water heat exchanger 11 reducing WATER AS FLOW MEDIUM temperature；
Condenser 10-3, its outlet communicates with the inlet tube of flue gas auxiliary heater 9；
Evaporimeter 10-2, the pipeline before its inlet tube cools down with thermal power plant's open type or closed-type circulating cooling water system communicates, and the pipeline after its outlet cools down with thermal power plant's open cycle cooling water system or closed circle water system communicates；
Generator 10-4, its inlet tube communicates with thermal power plant Auxiliary Steam, and its outlet communicates with the draining system of thermal power plant.
As preferred embodiment of the present utility model, the inlet tube of evaporimeter 10-2 is additionally provided with recirculated water booster pump 12.
As preferred embodiment of the present utility model, the inlet tube of absorber 10-1 is additionally provided with absorber inlet valve.
As preferred embodiment of the present utility model, the outlet of condenser 10-3 is provided with condenser out valve.
As preferred embodiment of the present utility model, the outlet of the flue gas auxiliary heater 9 pipeline with generator 10-4 by being provided with drain valve communicates.
As preferred embodiment of the present utility model, thermal power plant's Auxiliary Steam is connected with flue gas auxiliary heater 9 by being provided with the arm of flue gas auxiliary heater 9 stop valve, and above-mentioned arm is arranged in parallel with the inlet tube of generator 10-4.
As preferred embodiment of the present utility model, the inlet tube of generator 10-4 is additionally provided with steam of generator stop valve.
As preferred embodiment of the present utility model, or the inlet ductwork of absorber 10-1 directly can export with the WATER AS FLOW MEDIUM of smoke re-heater 7 and communicate.
As preferred embodiment of the present utility model, the WATER AS FLOW MEDIUM circulatory system also includes moisturizing waste removal equipment.
As preferred embodiment of the present utility model, the low adding system of boiler is to use steam turbine low-pressure to draw gas to heat the heat-exchange system of low-temperature condensate.
nullBefore enforcement，Detection is needed to obtain boiler flow of flue gas under different load、Row's temperature、The parameter such as flow velocity and blast，Detection obtains open cycle cooling water or the flow of enclosed cooling water that can be used for Waste Heat Recovery、The parameter such as water temperature before pressure and adjustable range thereof and cooling，Detection obtains the adjustable range supplementing steam flow，And according to concrete boiler smoke parameter、The heating capacity of used heat parameter determination first-class absorption type heat pump，When being embodied as，Gas cooler 2 is obtained by detection、The smoke entrance temperature of smoke re-heater 7、The parameters such as WATER AS FLOW MEDIUM out temperature，And by flue-gas temperature、The signals such as flow and WATER AS FLOW MEDIUM flow temperature are input in the control system of first-class absorption type heat pump 10，Control system controls the operating of whole system，Including automatically controlling putting into operation and stopping transport of flue gas auxiliary heater，And required quantity of steam when putting into operation.
When being embodied as, it is divided into following several mode of operation, is elaborated as follows below in conjunction with embodiment 1.
Embodiment
2
Energy-conservation branch road mode of operation, flue gas, after boiler is discharged, passes sequentially through 1, gas cooler 2, electrostatic precipitator 3, FGD desulfurizing tower 4, wet electrical dust precipitator 6(may have, it is also possible to be not provided with), smoke re-heater 7, discharge finally by chimney 8.
When boiler is properly functioning, the heat that gas cooler absorbs in flue gas condenses water for heating boiler, reduces gross coal consumption rate, is lowered into the cigarette temperature of electrostatic precipitator simultaneously, improves efficiency of dust collection.First-class absorption type heat pump 10 runs, and closes bypass channel valve, and primer pump 12, booster pump 5 run.Smoke entrance flow according to smoke re-heater, temperature and WATER AS FLOW MEDIUM import and export flow, temperature, steam parameter, the temperature automatic adjustment of open cycle cooling water or enclosed cooling water enters the steam flow of generator 10-4 and enters open cycle cooling water or the enclosed cooling water flow of evaporimeter 10-2, so that the heat needed for the heating capacity of first-class absorption type heat pump and smoke re-heater adapts, control the WATER AS FLOW MEDIUM inlet temperature (i.e. the WATER AS FLOW MEDIUM outlet temperature of first-class absorption type heat pump condenser 10-3) of smoke re-heater 7 at about 95 DEG C simultaneously, guarantee that the flue-gas temperature entering chimney 10 is at about 80 DEG C.
In order to ensure heat pump 10 normal safe run, need use recirculated water by water water-to-water heat exchanger 11 regulation enter absorber 10-1 WATER AS FLOW MEDIUM and enter evaporimeter 10-2 circulating water temperature, it is ensured that operation of heat pump operating mode is away from the crystallization temperature of lithium bromide.
When the outlet temperature of condenser 10-3 can not meet smoke re-heater 7 disappear " white cigarette " temperature requirements time, need start auxiliary steam heater 9 steam directly heat WATER AS FLOW MEDIUM further.
Driving steam parameter is 0.2MPa-0.8MPa saturated vapor, the generator 10-4 of this steam inflow first-class absorption type heat pump 10 is in order to drive heat pump cycle, and required quantity of steam is adjusted according to the heat needed for smoke re-heater, the inlet temperature of spent hot water and heating load.
Embodiment
3
Energy-conservation branch trouble mode of operation, in conjunction with the embodiments 1, when first-class absorption type heat pump 10 breaks down or overhauls, close the valve of turnover heat pump 10, opening bypass valve, WATER AS FLOW MEDIUM is only heated to the inlet temperature needed for smoke re-heater by flue gas auxiliary heater 12.
Although the utility model is open as above with preferred embodiment; but it is not for limiting the utility model; any those skilled in the art are without departing from spirit and scope of the present utility model; can make possible variation and amendment, protection domain the most of the present utility model should be defined in the range of standard with the utility model claim.
Claims (10)
1. the low grade heat energy during a coal steam-electric plant smoke pollutant processes reclaims energy conserving system, air preheater (1) that described system includes being sequentially connected, gas cooler (2), electrostatic precipitator (3), desulfurizing tower (4), wet electrical dust precipitator (6), smoke re-heater (7), chimney (8), it is characterized in that
The inlet and outlet adding system low with boiler of described gas cooler (2) is connected；
The WATER AS FLOW MEDIUM circulatory system pipeline of described smoke re-heater (7) is provided with WATER AS FLOW MEDIUM booster pump (5), water water-to-water heat exchanger (11), heat pump (10), recirculated water booster pump (12), flue gas auxiliary heater (9)；
Described heat pump includes the following:
Absorber (10-1), its inlet ductwork exports with the WATER AS FLOW MEDIUM of smoke re-heater (7) and communicates, and is additionally provided with the water water-to-water heat exchanger (11) reducing WATER AS FLOW MEDIUM temperature in its inlet ductwork；
Condenser (10-3), its outlet communicates with the inlet tube of flue gas auxiliary heater 9；
Evaporimeter (10-2), the pipeline before its inlet tube cools down with thermal power plant's open type or closed-type circulating cooling water system communicates, and the pipeline after its outlet cools down with thermal power plant's open cycle cooling water system or closed circle water system communicates；
Generator (10-4), its inlet tube communicates with thermal power plant Auxiliary Steam, and its outlet communicates with the draining system of thermal power plant.
Low grade heat energy during a kind of coal steam-electric plant smoke pollutant the most according to claim 1 processes reclaims energy conserving system, it is characterised in that be additionally provided with recirculated water booster pump (12) on the inlet tube of described evaporimeter (10-2).
Low grade heat energy during a kind of coal steam-electric plant smoke pollutant the most according to claim 1 processes reclaims energy conserving system, it is characterised in that be additionally provided with absorber inlet valve on the inlet tube of described absorber (10-1).
Low grade heat energy during a kind of coal steam-electric plant smoke pollutant the most according to claim 1 processes reclaims energy conserving system, it is characterised in that the outlet of described condenser (10-3) is provided with condenser out valve.
Low grade heat energy during a kind of coal steam-electric plant smoke pollutant the most according to claim 1 processes reclaims energy conserving system, it is characterised in that the outlet of the described flue gas auxiliary heater (9) pipeline with generator (10-4) by being provided with drain valve communicates.
Low grade heat energy during a kind of coal steam-electric plant smoke pollutant the most according to claim 1 processes reclaims energy conserving system, it is characterized in that, described thermal power plant Auxiliary Steam is connected with flue gas auxiliary heater (9) by being provided with the arm of flue gas auxiliary heater (9) stop valve, and above-mentioned arm is arranged in parallel with the inlet tube of generator (10-4).
Low grade heat energy during a kind of coal steam-electric plant smoke pollutant the most according to claim 6 processes reclaims energy conserving system, it is characterised in that be additionally provided with steam of generator stop valve on the inlet tube of described generator (10-4).
Low grade heat energy during a kind of coal steam-electric plant smoke pollutant the most according to claim 1 processes reclaims energy conserving system, it is characterised in that or the inlet ductwork of described absorber (10-1) can directly communicate with the outlet of the WATER AS FLOW MEDIUM of smoke re-heater (7).
9. the low grade heat energy in processing according to a kind of coal steam-electric plant smoke pollutant described in any one of claim 1-8 reclaims energy conserving system, it is characterised in that the described WATER AS FLOW MEDIUM circulatory system also includes moisturizing waste removal equipment.
10. the low grade heat energy in processing according to a kind of coal steam-electric plant smoke pollutant described in any one of claim 1-8 reclaims energy conserving system, it is characterised in that the low adding system of described boiler is to use steam turbine low-pressure to draw gas to heat the heat-exchange system of low-temperature condensate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620003936.4U CN205560803U (en) | 2016-01-06 | 2016-01-06 | Low -grade heat recovery economizer system during smoke pollutants of thermal power plant handles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620003936.4U CN205560803U (en) | 2016-01-06 | 2016-01-06 | Low -grade heat recovery economizer system during smoke pollutants of thermal power plant handles |
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| CN205560803U true CN205560803U (en) | 2016-09-07 |
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| CN201620003936.4U Active CN205560803U (en) | 2016-01-06 | 2016-01-06 | Low -grade heat recovery economizer system during smoke pollutants of thermal power plant handles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546564A (en) * | 2016-01-06 | 2016-05-04 | 浙江浙能节能科技有限公司 | Energy-saving recycling system for low-grade heat energy in smoke pollutant treatment of thermal power plant |
| CN109855109A (en) * | 2019-03-07 | 2019-06-07 | 华北电力大学 | A kind of the depth recyclable device and its method of heat of smoke discharged from boiler of power station |
-
2016
- 2016-01-06 CN CN201620003936.4U patent/CN205560803U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546564A (en) * | 2016-01-06 | 2016-05-04 | 浙江浙能节能科技有限公司 | Energy-saving recycling system for low-grade heat energy in smoke pollutant treatment of thermal power plant |
| CN109855109A (en) * | 2019-03-07 | 2019-06-07 | 华北电力大学 | A kind of the depth recyclable device and its method of heat of smoke discharged from boiler of power station |
| CN109855109B (en) * | 2019-03-07 | 2023-09-01 | 华北电力大学 | Deep recovery device and method for exhaust gas waste heat of power station boiler |
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Address after: 310006 room 501-34, Lantian business center, Gongshu District, Hangzhou City, Zhejiang Province Patentee after: ZHEJIANG ZHENENG XINGYUAN ENERGY SAVING TECHNOLOGY CO.,LTD. Address before: 310006 block g, 9 / F, Baima building, miduqiao Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG ZHENENG ENERGY SAVING TECHNOLOGY Co.,Ltd. |