CN202970814U - High-temperature steam waste heat electricity generation energy-saving system - Google Patents
High-temperature steam waste heat electricity generation energy-saving system Download PDFInfo
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- CN202970814U CN202970814U CN 201220700443 CN201220700443U CN202970814U CN 202970814 U CN202970814 U CN 202970814U CN 201220700443 CN201220700443 CN 201220700443 CN 201220700443 U CN201220700443 U CN 201220700443U CN 202970814 U CN202970814 U CN 202970814U
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Abstract
The utility model provides a high-temperature steam waste heat electricity generation energy-saving system which comprises a steam drum, a boiler and a steam turbine generator set. A steam outlet of the boiler is connected with the steam turbine generator set through a pipeline. The high-temperature steam waste heat electricity generation energy-saving system further comprises a steam pump. A heating circulating system is formed between the steam drum and the boiler. A steam outlet of the steam turbine generator set is connected with the steam drum or the heating circulating system through the steam pump and the steam pump directly pumps waste heat steam generated after the steam turbine generator set generates electricity back to the steam drum or the heating circulating system. The high-temperature steam waste heat electricity generation energy-saving system enables the waste heat steam generated after the steam turbine generator set generates the electricity to be reused without the need of being cooled first by the utilization of a condenser cooling system. Instead, the waste heat steam after electricity generation is directly pumped back to the steam drum or the heating circulating system. Therefore, not only is the condenser cooling system in the prior art saved, but also the waste heat steam is fully utilized, and the effects of saving energy and improving resource use ratio are achieved.
Description
Technical field
The utility model relates to the recycling field of high-temperature steam waste heat, relates in particular to a kind of high-temperature steam cogeneration energy conserving system.
Background technique
Cogeneration technology refers to utilize thermal power transfer unnecessary in production process to be the technology of electric energy, particularly, refers to utilize heat or flammable matter in the working medium such as waste gas, waste liquid to make thermal source, produces steam and is used for generating.Along with the technology of cogeneration is increasingly mature, the attention of country to the energy to the support of energy-saving and emission-reduction, more and more can utilize the enterprise of waste heat all to recognize the benefit that cogeneration brings.Cogeneration both can alleviate the thermo-pollution to environment, had again significant energy-saving effect and good economic benefit and social benefit.The waste heat that is used for generating mainly contains: high-temperature flue gas waste heat, chemical reaction waste heat, waste gas, waste liquid waste heat, low temperature exhaust heat (lower than 200 ℃) etc.In recent years, along with heat recovery technology is advanced by leaps and bounds, the application of cogeneration technology was actively promoted, and the efficient of heat recovery simultaneously significantly improves.But undeniable, still some waste heat is effectively reclaimed, especially at the waste heat that utilizes high temperature to produce in carrying out the steam electric power process.
Chinese utility model patent (CN 201502411U) discloses a kind of afterheat of converter gas steam generating system, it comprises converter and is arranged on afterheat of converter gas boiler directly over converter, the water intake of afterheat of converter gas boiler is connected with drum by pipeline respectively with steam ouput, the steam (vapor) outlet of described drum is connected with steam turbine with the low pressure steam pipe network after being arranged in parallel thermal accumulator by steam conveying pipe, steam turbine is connected with generator, the steam (vapor) outlet of steam turbine is connected with condenser by pipeline, the water outlet of condenser passes through oxygen-eliminating device, feed water pump is connected with drum.This system utilizes waste heat to carry out steam electric power, electricity is supplies with the steel-making use, has saved the electric cost in the steelmaking process.
Chinese utility model patent (CN 202431309U) discloses a kind of energy-saving power generation system, and it comprises: the high temperature heat source unit, comprise boiler, and this boiler output high temperature and high pressure steam, and end slag is outputed in the boiler slag-cooling device; Generator unit comprises steam turbine and generator, and wherein, the high temperature and high pressure steam of boiler output enters steam turbine, and steam turbine drives the generator generating; The low-temperature heat source unit comprises condenser and boiler replenishing water system, and wherein, the steam discharge of steam turbine enters condenser and condenses into water, and the moisturizing of this water of condensation and boiler replenishing water system is from low-temperature heat source unit output; Heating deoxygenation unit, comprise low-pressure heater, boiler slag-cooling device and oxygen-eliminating device, wherein, after being heated through low-pressure heater, the cold water part of low-temperature heat source unit output enters oxygen-eliminating device, enter oxygen-eliminating device after the constituent of another part process boiler slag-cooling device is heated, the water extraction of oxygen-eliminating device output is supplied with boiler.This system utilizes the sensible heat of boiler bottom slag and can improve generating efficiency.
Chinese utility model patent (CN 2549417Y) discloses a kind of power generating system by glass-kiln waste heat, comprise the power generating system by glass-kiln waste heat that exhaust heat boiler, Turbo-generator Set, condensation Zhuan Catching-rabbits and circulating water pump form, described exhaust heat boiler is the superheated vapor exhaust heat boiler, its air outlet is by being with valvular pipeline directly to be connected with Turbo-generator Set, and Turbo-generator Set fills Catching-rabbits, oxygen-eliminating device and circulating water pump by condensation respectively and exhaust heat boiler forms circulation loop.Power generation system of the present utility model can take full advantage of glass kiln residual heat, through steam turbine, heat energy is changed into electric energy, can effectively reduce energy consumption and power consumption, reduces the glass production cost, improves the problems such as environmental thermal pollution that glass kiln residual heat emptying causes.
Utilize above-mentioned the technological process that high temperature carries out steam electric power, the afterheat steam after generating electricity by generator set is most of needs by cooling rear utilization or separately be used as him, and its shortcoming is: the waste heat after, generating electricity by generator set is not well utilized; Two, condensation device must be set and use after with the high-temperature residual heat steam cooling, this will increase the cost that enterprise uses afterheat generating system undoubtedly.
Therefore, those skilled in the art be devoted to develop make the high-temperature steam waste heat recycle better, energy-conservation and improve the high-temperature steam cogeneration energy conserving system of resource utilization.
The model utility content
Because the defects of prior art, technical problem to be solved in the utility model has been to provide the high-temperature steam cogeneration energy conserving system that makes afterheat steam obtain better cycling and reutilization.
For achieving the above object, the utility model provides high-temperature steam cogeneration energy conserving system, comprise steam bag, boiler, Turbo-generator Set, the steam ouput of described boiler is connected with described Turbo-generator Set by pipeline, it is characterized in that, also comprise steam pump, form heating circulation system between described steam bag and boiler, the steam ouput of described Turbo-generator Set is connected with described steam bag or described heating circulation system by described steam pump.
After using technique scheme, make the afterheat steam after Turbo-generator Set is generated electricity not need to utilize the rear recycling of condenser cooling system cooling, but the afterheat steam after generating electricity is by the direct blowback steam bag of steam pump or heating circulation system, both omitted condenser cooling system of the prior art, take full advantage of again afterheat steam, reached effect energy-conservation and that improve resource utilization.
Preferably, described high-temperature steam cogeneration energy conserving system also comprises recycle pump, forms described heating circulation system by described recycle pump between described steam bag and boiler.
Preferably, described high-temperature steam cogeneration energy conserving system also comprises the valve of being located on described steam pump and pipeline that described steam bag or described heating circulation system are connected.
Preferably, the steam ouput of described Turbo-generator Set is provided with bypass duct by described steam pump with the pipeline that described steam bag or described heating circulation system are connected, and is used for connecting other users.
Preferably, described high-temperature steam cogeneration energy conserving system also comprises deoxygenation water tank and feed water pump, described deoxygenation water tank is connected with the steam ouput of described Turbo-generator Set and passes through described feed water pump and is connected with described steam bag, and described deoxygenation water tank is provided with valve with the pipeline that the steam ouput of described Turbo-generator Set is connected.
Preferably, described high-temperature steam cogeneration energy conserving system also comprises the desalination water tank, and described desalination water tank is located on described deoxygenation water tank and pipeline that described feed water pump is connected.
Preferably, the steam of the steam ouput of described boiler output is 360-480 ℃, and the afterheat steam of the steam ouput output of described Turbo-generator Set is 230-320 ℃.
Preferably, described high-temperature steam cogeneration energy conserving system also comprises the low-voltage safety atmospheric valve, on the steam ouput that described low-voltage safety atmospheric valve is located at described Turbo-generator Set and the pipeline that described steam pump is connected.
Preferred, described Turbo-generator Set can be set to many groups, take 3 groups as example, also is provided with low-voltage safety atmospheric valve and steam pump with the corresponding connection of steam ouput of described 3 groups of Turbo-generator Set; Described boiler steam ouput is provided with valve, and described 3 groups of Turbo-generator Set steam inlets respectively are provided with valve; The pipeline that the steam ouput of described Turbo-generator Set is connected with described steam bag or described heating circulation system by described steam pump is provided with the connecting tube by the valve controlling flow amount that is connected on pipeline between each valve with the valve of described boiler steam ouput and described Turbo-generator Set steam inlet; Described boiler is provided with superheater.
Preferably, the steam of the steam ouput output of described boiler is increased to 480-550 ℃ through the superheater temperature after heating, the afterheat steam of the steam ouput output of described Turbo-generator Set is 230-320 ℃, described afterheat steam is by described connecting tube and 480-550 ℃ of vapor mixing after overheated, and mixed steam is 360-480 ℃.
Described Turbo-generator Set comprises steam turbine and generator.
Be described further below with reference to the technique effect of accompanying drawing to design of the present utility model, concrete structure and generation, to understand fully the purpose of this utility model, feature and effect.
Description of drawings
Fig. 1 is the schematic diagram of prior art;
Fig. 2 is embodiment's one of the present utility model schematic diagram;
Fig. 3 is embodiment's two of the present utility model schematic diagram.
Wherein, 1 is that steam bag, 2 is boiler, 3,31,32,33 is that steam turbine power generation unit, 4 is that deoxygenation water tank, 5 is that desalination water tank, 6 is that feed water pump, 7 is recycle pump, 81,82,83,84,85,86,87 is valve, 9,91,92,93 is steam pump, 10,101,102,103 is that low-voltage safety atmospheric valve, 11 is that condenser cooling system, 12 is connecting tube.
Embodiment
As shown in Figure 1, in prior art, the high-temperature steam afterheat generating system comprises steam bag 1, boiler 2, steam turbine power generation unit 3, deoxygenation water tank 4, desalination water tank 5, feed water pump 6, recycle pump 7, condenser cooling system 11; The water intake of the water outlet of steam bag 1 and boiler 2 is connected to form heating circulation system by recycle pump 7; The steam ouput of steam bag 1 is connected by pipeline with the steam inlet of boiler 2, steam after the heating circulation system heating carries out carbonated drink separation in steam bag 1, water after separation is by recycle pump 7 blowback boilers 2, and be heated to form steam in boiler 2, a steam part after heating is recovered into steam bag 1, part steam enters Turbo-generator Set 3 through pipeline, Turbo-generator Set 3 comprises steam turbine and generator, because steam constantly expands, thereby the blade rotation of swiftly flowing Steam Actuation steam turbine drives generator.In the process of the continuous work done of steam, vapor pressure and temperature constantly reduce, and enter at last condenser cooling system 11 and the water cooling that is cooled, and condense into water.water of condensation concentrates on the vapour condenser bottom and is beaten to heater by condensate pump and pass through 4 deoxygenations of deoxygenation water tank again, steam in boiler circuit and water of condensation, a lot of and will pass through many valve arrangements due to pipeline, so just unavoidable the generation run, emit, drip, the phenomenons such as leakage, these phenomenons all can cause the loss of water more or less, therefore need desalted water production to keep the skin wet, return steam bag 1 with the water pump that will preheat by demineralized water case 5 and feed water pump 6 after deoxygenation, through boiler 2, water is heated into overheated steam again, deliver to Turbo-generator Set 3 works done, constantly work done like this goes round and begins again.
In prior art, boiler 2 is for example exported, and the steam of 360-480 ℃ enters Turbo-generator Set 3, afterheat steam after Turbo-generator Set 3 generatings is approximately 230-320 ℃, this part steam part enters condenser cooling system 11, a part is controlled by valve 81 can directly enter the deoxygenation water tank, be about 70-90 ℃ through the cooled afterheat steam of condenser cooling system 11 and enter deoxygenation water tank 4, desalted water production replenishes normal-temperature water and enters deoxygenation water tank 4 simultaneously, and the steam after heating is about 100-110 ℃ by feed water pump 6 blowback steam bags.Afterheat steam after Turbo-generator Set 3 generating carries out deoxygenation after must be cooling through condenser cooling system 11 again, in oxygen removal process again through output after the heater heating.200 ℃ of left and right afterheat steams are wherein effectively reclaimed.
Fig. 2 is embodiment one of the present utility model, and as shown in Figure 2, high-temperature steam cogeneration energy conserving system comprises steam bag 1, boiler 2, steam turbine power generation unit 3, deoxygenation water tank 4, desalination water tank 5, feed water pump 6, recycle pump 7, steam pump 9; The steam ouput of described boiler 2 is connected with described Turbo-generator Set 3 by pipeline, form heating circulation system between described steam bag 1 and boiler 2, the steam ouput of described Turbo-generator Set 3 is connected with described steam bag 1 or described heating circulation system by described steam pump 9.be specially: the water intake of the water outlet of steam bag 1 and boiler 2 is connected to form heating circulation system by recycle pump 7, the steam ouput of steam bag 1 is connected by pipeline with the steam inlet of boiler 2, steam after the heating circulation system heating carries out carbonated drink separation in steam bag 1, water after separation is by recycle pump 7 blowback boilers 2, and be heated to form steam in boiler 2, a steam part after heating is recovered into steam bag 1, part steam enters Turbo-generator Set 3 through pipeline, Turbo-generator Set 3 comprises steam turbine and generator, because steam constantly expands, thereby the blade rotation of swiftly flowing Steam Actuation steam turbine drives the generator generating, afterheat steam after generating is most of by the direct blowback steam bag 1 of steam pump 9, part steam optionally can be controlled by in steam pump 9 blowback steam bags 1 or heating circulation system by valve 82.Because steam bag belongs to high temperature and high pressure containers, generally do not allow after dispatching from the factory to carry out excessive change, otherwise easily cause potential safety hazard.Be suggestion blowback heating circulation system in old friend's technique, avoid steam bag is carried out excessive change; The steam bag of new factory can directly customize according to the needs of new process, therefore direct blowback steam bag.Part steam is controlled by valve 81 and is exported deoxygenation in deoxygenation water tank 4 to.Deoxygenation water tank 4 is connected with the steam ouput of Turbo-generator Set 3 and passes through feed water pump 6 and is connected with steam bag 1.A lot of and will pass through many valve arrangements due to pipeline, so just produce unavoidably the phenomenons such as run, drip, leak, these phenomenons all can cause the loss of water more or less, therefore need desalted water production to keep the skin wet, and demineralized water can prevent that compound too much in sealing causes pipeline and equipment scaling to stop up, and prevents corrosion pipeline and equipment.Desalination water tank 5 is located on deoxygenation water tank 4 and pipeline that steam bag 1 is connected.Water pump after desalination water tank 5 and feed water pump 6 will preheat deoxygenation returns steam bag 1, then through boiler 2, water is heated into overheated steam, delivers to Turbo-generator Set 3 works done.Turbo-generator Set 3 steam ouputs, when breaking down for the steam pump that prevents postposition, outlet pressure raises suddenly generator set is worked the mischief and damages generator set, therefore need at the steam ouput of Turbo-generator Set 3, low-voltage safety atmospheric valve 10 is set.As needs, can on the steam ouput of Turbo-generator Set 3 and pipeline that steam bag 1 or heating circulation system are connected, bypass duct be set, control by valve a part of steam is supplied to other users.Compared with prior art, the utility model has omitted the condenser cooling system, the afterheat steam of Turbo-generator Set 3 output does not need to be recycled after cooling, but directly by recycling in steam pump 9 blowback steam bags 1 or heating circulation system, reach the at utmost technique effect of effective recycling afterheat steam, reduced simultaneously cost.
In practice, boiler 2 is for example exported, and the steam of 360-480 ℃ enters Turbo-generator Set 3, afterheat steam after Turbo-generator Set 3 generatings is approximately 230-320 ℃, this part steam is most of by in steam pump 9 blowback steam bags 1 or heating circulation system, and 200 ℃ of left and right afterheat steams are wherein fully reclaimed; Another part is controlled by valve 81 can directly enter the deoxygenation water tank, and desalted water production replenishes normal-temperature water and enters deoxygenation water tank 4 simultaneously, and the steam after heating is about 100-110 ℃ by feed water pump 6 blowback steam bags.
Fig. 3 is embodiment two of the present utility model, as shown in Figure 3, described Turbo-generator Set 3 is not limited only to one group, can be set to as required many groups, take 3 groups as example, also be provided with the steam pump 91 with the corresponding connection of steam ouput of described 3 groups of Turbo- generator Set 31,32,33,92,93 and low-voltage safety atmospheric valve 101,102,103; Described boiler 2 steam ouputs are provided with valve 83, and described each Turbo- generator Set 31,32,33 steam inlets respectively are provided with valve 85,86,87; Described Turbo- generator Set 31,32,33 steam ouput is by described steam pump 91,92,93 pipelines that are connected with described steam bag 1 or described heating circulation system are provided with and the valve 83 of described boiler 1 steam ouput and the valve 85 of each Turbo- generator Set 31,32,33 steam inlets, the connecting tube 12 by valve 84 control flows that is connected on pipeline between 86,87; Described boiler 1 is provided with superheater.When original generator set has reached rated power, can control flow by connecting tube 12 and the valve that arranges 84 on this connecting tube 12, with Turbo- generator Set 31,32, the afterheat steam of 33 steam ouput outputs is by steam pump 91,92, in 93 pipelines that pump into before Turbo-generator Set, steam with boiler 2 steam ouput outputs heats through superheater simultaneously, use valve 83 to control steam flow, make Turbo- generator Set 31,32, after the afterheat steam of 33 blowbacks and the superheated vapor after superheater heats mix, obtain the needed vapor (steam) temperature of generator set.Again steam is delivered to respectively the Turbo-generator Set of original Turbo-generator Set to keep former generated output and to newly increase, the flow of required power and quantity depending on afterheat steam, the afterheat steam that so reclaims will farthest be recycled.
in practice, boiler 2 is exported for example steam of 360-480 ℃, be increased to 480-550 ℃ through the superheated vapor after the superheater heating, the afterheat steam of 230-320 ℃ of being approximately of superheated vapor and Turbo-generator Set blowback is controlled by valve and is mixed, obtain the steam of 360-480 ℃ after mixing, subsequently by each Turbo- generator Set 31, 32, valve 85 before 33, 86, 87 selectively control steam enters Turbo- generator Set 31, 32, 33 actings, Turbo- generator Set 31, 32, afterheat steam after 33 generatings is most of by steam pump 91, 92, in 93 blowback steam bags 1 or heating circulation system, part afterheat steam blowback Turbo- generator Set 31, 32, continue circulation in pipeline before 33, another part is controlled by valve 81 can directly enter the deoxygenation water tank, desalted water production replenishes normal-temperature water and enters deoxygenation water tank 4 simultaneously, steam after heating is about 100-110 ℃ by feed water pump 6 blowback steam bags, control rate of water make-up according to the liquid level of steam bag.
More than describe preferred embodiment of the present utility model in detail.The ordinary skill that should be appreciated that related domain need not creative work and just can make many modifications and variations according to design of the present utility model.Therefore, all technician in the art comply with design of the present utility model on the basis of existing technology by the available technological scheme of logical analysis, reasoning, or a limited experiment, all should be in the determined protection domain by claims.
Claims (10)
1. high-temperature steam cogeneration energy conserving system, comprise steam bag (1), boiler (2), Turbo-generator Set (3), the steam ouput of described boiler (2) is connected with described Turbo-generator Set (3) by pipeline, it is characterized in that, described high-temperature steam cogeneration energy conserving system also comprises steam pump (9), form heating circulation system between described steam bag (1) and boiler (2), the steam ouput of described Turbo-generator Set (3) is connected with described steam bag (1) or described heating circulation system by described steam pump (9).
2. high-temperature steam cogeneration energy conserving system as claimed in claim 1, it is characterized in that, described high-temperature steam cogeneration energy conserving system also comprises recycle pump (7), forms described heating circulation system by described steam pump (9) and described recycle pump (7) between described steam bag (1) and boiler (2).
3. high-temperature steam cogeneration energy conserving system as claimed in claim 1, it is characterized in that, described high-temperature steam cogeneration energy conserving system also comprises valve (82), and described valve (82) is located on described steam pump (9) and pipeline that described steam bag (1) or described heating circulation system are connected.
4. high-temperature steam cogeneration energy conserving system as claimed in claim 1, it is characterized in that, the steam ouput of described Turbo-generator Set (3) is provided with bypass duct by described steam pump (9) with the pipeline that described steam bag (1) or described heating circulation system are connected, and is used for connecting other users.
5. high-temperature steam cogeneration energy conserving system as claimed in claim 1, it is characterized in that, described high-temperature steam cogeneration energy conserving system also comprises deoxygenation water tank (4) and feed water pump (6), described deoxygenation water tank (4) is connected with the steam ouput of described Turbo-generator Set (3) and passes through described feed water pump (6) and is connected with described steam bag (1), and described deoxygenation water tank (4) is provided with valve (81) with the pipeline that the steam ouput of described Turbo-generator Set (3) is connected.
6. high-temperature steam cogeneration energy conserving system as claimed in claim 5, it is characterized in that, described high-temperature steam cogeneration energy conserving system also comprises desalination water tank (5), and described desalination water tank (5) is located on described deoxygenation water tank (4) and pipeline that described feed water pump (6) is connected.
7. high-temperature steam cogeneration energy conserving system as claimed in claim 1, is characterized in that, the steam of the steam ouput output of described boiler (2) is 360-480 ℃, and the afterheat steam of the steam ouput output of described Turbo-generator Set (3) is 230-320 ℃.
8. high-temperature steam cogeneration energy conserving system as claimed in claim 1, it is characterized in that, described high-temperature steam cogeneration energy conserving system also comprises low-voltage safety atmospheric valve (10), on the steam ouput that described low-voltage safety atmospheric valve (10) is located at described Turbo-generator Set (3) and the pipeline that described steam pump (9) is connected.
9. high-temperature steam cogeneration energy conserving system as claimed in claim 8, it is characterized in that, described Turbo-generator Set is 3 group (31,32,33), also comprise low-voltage safety atmospheric valve (101 with the corresponding connection of steam ouput of described 3 groups of Turbo-generator Set, 102,103) and steam pump (91,92,93); Described boiler (2) steam ouput is provided with valve (83), and described 3 groups of Turbo-generator Set (31,32,33) steam inlet respectively is provided with valve (85,86,87); Described Turbo-generator Set (31,32,33) steam ouput is by described steam pump (91,92,93) pipeline that is connected with described steam bag (1) or described heating circulation system is provided with and the valve (83) of described boiler (2) steam ouput and the valve (85 of described Turbo-generator Set (31,32,33) steam inlet, 86,87) connecting tube (12) by valve (84) control flow that is connected on the pipeline between; Described boiler (2) is provided with superheater.
10. high-temperature steam cogeneration energy conserving system as claimed in claim 9, the steam of the steam ouput output of described boiler (2) is increased to 480-550 ℃ through the superheater temperature after heating, described Turbo-generator Set (31,32, the afterheat steam of steam ouput output 33) is 230-320 ℃, described afterheat steam is by described connecting tube (12) and 480-550 ℃ of vapor mixing after overheated, and mixed steam is 360-480 ℃.
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| CN 201220700443 CN202970814U (en) | 2012-12-17 | 2012-12-17 | High-temperature steam waste heat electricity generation energy-saving system |
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| CN 201220700443 CN202970814U (en) | 2012-12-17 | 2012-12-17 | High-temperature steam waste heat electricity generation energy-saving system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016116216A1 (en) * | 2015-01-23 | 2016-07-28 | Siemens Aktiengesellschaft | Pre-heating of untreated water in power plants |
| CN106066030A (en) * | 2016-07-19 | 2016-11-02 | 卢敏 | A kind of energy-efficient electricity generation system of UTILIZATION OF VESIDUAL HEAT IN |
-
2012
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016116216A1 (en) * | 2015-01-23 | 2016-07-28 | Siemens Aktiengesellschaft | Pre-heating of untreated water in power plants |
| CN107208880A (en) * | 2015-01-23 | 2017-09-26 | 西门子公司 | Raw water preheating in power generating equipment |
| US20180016947A1 (en) * | 2015-01-23 | 2018-01-18 | Siemens Aktiengesellschaft | Preheating of untreated water in power plants |
| CN106066030A (en) * | 2016-07-19 | 2016-11-02 | 卢敏 | A kind of energy-efficient electricity generation system of UTILIZATION OF VESIDUAL HEAT IN |
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