CN104110274A - Lubrication and cooling system of low-temperature thermal power generation expander - Google Patents
Lubrication and cooling system of low-temperature thermal power generation expander Download PDFInfo
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- CN104110274A CN104110274A CN201310139473.5A CN201310139473A CN104110274A CN 104110274 A CN104110274 A CN 104110274A CN 201310139473 A CN201310139473 A CN 201310139473A CN 104110274 A CN104110274 A CN 104110274A
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Abstract
The invention discloses a lubrication and cooling system of a low-temperature thermal power generation expander. The lubrication and cooling system comprises a synchronous generator, a double-screw expander connected to the synchronous generator and used for driving the synchronous generator, and a flooded evaporator. An inlet of a heat source channel of the flooded evaporator is connected to a low-temperature heat source by a pipe. An outlet of the heat source channel of the flooded evaporator is connected to a low-temperature heat source return pipe. A mixed oil power generation medium inlet of the flooded evaporator is connected to a mixed oil power generation medium by a medium pipe. A heat exchange-produced saturated gas power generation medium outlet of the flooded evaporator is connected to a power generation medium inlet of the double-screw expander by a pipe. The flooded evaporator is provided with a rich lubricating oil outlet for discharging rich lubricating oil separated from the mixed oil power generation medium. The rich lubricating oil outlet is connected to a lubricating oil inlet of the double-screw expander by a pipe and is used for lubricating a bearing of the double-screw expander. The lubrication and cooling system can greatly simplify the original screw machine lubrication and cooling system, save an equipment investment and improve low-temperature power generator operation stability.
Description
Technical field
The present invention relates to a kind of low-temperature heat power generating device.Particularly relate to a kind of lubricated and cooling system of the low-temperature heat power generation decompressor of using for 60 DEG C and above low-temperature heat power generation.
Background technique
In the development of current low-temperature heat power generation technology, the two circulating technologies of organic working medium are more suitable for, in low-temperature heat source, being subject to the people's attention because of it.
The organic rankie cycle low-temperature electricity-generating technology of current existence, as " low-temperature electricity-generating method and device (CN1837582) ", " sintered ring cold exhaust heat stepped recovery power generation system and technique (CN101344359) ", " low temperature ranking cycle system in multi-level solar (CN101216020) ", " self-overlapping type solar low temperature ranking cycle system (CN101344075) ", " Rankine cycle device having multiple turbo-generators(US.PAT.7665304) ", patents such as " Method and apparatus for decreasing marine vessel power plant exhaust temperature(US.PAT.7121906) ", these patents generally adopt steam turbine as decompressor, adopt water vapour as power generation medium, inflation process does not allow to occur liquid, therefore adopt overheated gas to expand, therefore require to utilize the temperature of the energy higher, be generally more than 150 DEG C, in low-temperature electricity-generating technical field, minimum generating temperature is the single cycle unit equipment of 150 DEG C at present.The temperature of Low Temperature Thermal is at 60-150 DEG C of warm area, and conventional water vapour power generation medium can not be used, therefore must adopt organic power generation medium to complete two circulating generations.
In the two circulating generation equipments of low temperature, the lubrication and cooling of screw expander is technological difficulties.Because screw machine inflation process completes under the condition of running up, if can not solve the technical problem of lubrication and cooling, whole low-temperature generation device cannot stable operation.Traditional screw machine running lubrication and cooling mode is difference complete independently, independently lubrication system is made up of oil pump, fuel tank and oil-way system, lubricant oil in fuel tank, under the effect of oil pump, is constantly carried lubricant oil to screw machine bearing portion, and returns to fuel tank and continue to recycle; Cooling water enters in the overcoat of screw machine under the effect of water pump in addition, cooling because warmware is crossed by the bearing operation friction portion of causing.This traditional lubrication mode complex structure, running more problems, very easily causes seal leakage, causes power generation medium to be leaked to fuel tank, causes the fault of integral device operation.
Summary of the invention
Technical problem to be solved by this invention is, provide one to utilize the molten oil nature of power generation medium, lubricant oil is joined in power generation medium, utilize lubricant oil unvaporized characteristic in generating warm area simultaneously, collect its liquefied mixture, complete the lubricated and cooling system of the low-temperature heat power generation decompressor of screw expander lubrication and cooling double action.
The technical solution adopted in the present invention is: a kind of lubricated and cooling system of low-temperature heat power generation decompressor, include synchronous generator and be connected with synchronous generator for driving the twin-screw expander of synchronous generator, also be provided with flooded evaporator, wherein, the thermal source passage inflow entrance of described flooded evaporator connects low-temperature heat source by pipeline, the thermal source passage outflow opening of flooded evaporator connects low-temperature heat source reflow pipe, the inflow entrance of the contaminated product power generation medium of flooded evaporator connects contaminated product power generation medium by medium pipeline, the outlet of the saturated gaseous state power generation medium producing after the heat exchange of flooded evaporator connects the power generation medium entrance of twin-screw expander by pipeline, be used for driving synchronous generator, on described flooded evaporator, be also provided with the rich lubricating oil outlet that flows out isolated rich lubricant oil from contaminated product power generation medium, described rich lubricating oil outlet connects the lubricating oil inlet of twin-screw expander by pipeline, for the bearing of lubricated twin-screw expander.
The other end of the low-temperature heat source reflow pipe of the thermal source passage outflow opening of described connection flooded evaporator connects low-temperature heat source.
Described low-temperature heat source is the thermal source of 55-150 DEG C.
The power generation medium outlet of twin-screw expander connects contaminated product power generation medium by pipeline.
Described contaminated product power generation medium comprises low-temperature electricity-generating medium and lubricant oil.
Described lubricant oil accounts for 3～15% of power generation medium.
Described contaminated product power generation medium is CH2FCF3(HFC-134a) and CH3CClF2(HCFC-142b) in one or both.
Contaminated product power generation medium described in the time that low-temperature heat source warm area is 55-80 DEG C adopts CH2FCF3(HFC-134a).
Contaminated product power generation medium described in the time that low-temperature heat source warm area is 65-150 DEG C adopts CH3CClF2(HCFC-142b).
Contaminated product power generation medium described in the time that low-temperature heat source warm area is 55-150 DEG C adopts CH3CClF2(HCFC-142b)+CH2FCF3(HFC-134a).
Lubricated and the cooling system of low-temperature heat power generation decompressor of the present invention, utilize the molten oil nature of power generation medium, lubricant oil is joined in power generation medium, utilize lubricant oil unvaporized characteristic in generating warm area simultaneously, collect its liquefied mixture, complete the lubrication and cooling double action of screw expander.The present invention can simplify original screw machine lubricating and cooling system greatly, saves equipment investment, the stability of strengthening cryogenerator equipment operation.The economic loss that the accidents such as the power generation medium leakage bringing thus cause will be eliminated.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present invention.
In figure
1: low-temperature heat source 2: contaminated product power generation medium
3: flooded evaporator 4: rich lubricant oil
5: saturated gaseous state power generation medium 6: outlet
7: twin-screw expander 8: synchronous generator
9: low-temperature heat source reflow pipe 10: power generation medium outlet
11: rich lubricating oil outlet
Embodiment
Below in conjunction with embodiment and accompanying drawing, the lubricated and cooling system of low-temperature heat power generation decompressor of the present invention is described in detail.
Lubricated and the cooling system of low-temperature heat power generation decompressor of the present invention, include synchronous generator 8 and be connected with synchronous generator 8 for driving the twin-screw expander 7 of synchronous generator 8, also be provided with flooded evaporator 3, wherein, the thermal source passage inflow entrance a of described flooded evaporator 3 connects low-temperature heat source 1 by pipeline, the thermal source passage outflow opening b of flooded evaporator 3 connects low-temperature heat source reflow pipe 9, the inflow entrance c of the contaminated product power generation medium of flooded evaporator 3 connects contaminated product power generation medium 2 by medium pipeline, the outlet 6 of the saturated gaseous state power generation medium 5 producing after the heat exchange of flooded evaporator 3 connects the power generation medium entrance of twin-screw expander 7 by pipeline, be used for driving synchronous generator 8, on described flooded evaporator 3, be also provided with the rich lubricating oil outlet 11 that flows out isolated rich lubricant oil 4 from contaminated product power generation medium, described rich lubricating oil outlet 11 connects the lubricating oil inlet of twin-screw expander 7 by pipeline, for the bearing of lubricated twin-screw expander.Utilize the effect of evaporating pressure, isolated rich lube layer liquid in vaporizer is transmitted back in decompressor, to lubricate decompressor bearing.And power generation medium component in rich oily liq of the present invention will absorb the frictional heat of bearing, power generation medium evaporation, completes the effect of cooling bearing, realizes the double-acting effect of lubrication.
The other end of the low-temperature heat source reflow pipe 9 of the thermal source passage outflow opening b of described connection flooded evaporator 3 connects low-temperature heat source 1.
Described low-temperature heat source is the thermal source of 55-150 DEG C.
The power generation medium outlet 10 of twin-screw expander 7 connects contaminated product power generation medium 2 by pipeline.
Described contaminated product power generation medium 2 comprises low-temperature electricity-generating medium and lubricant oil.Described lubricant oil accounts for 3～15% of power generation medium.A certain proportion of lubricant oil and power generation medium are carried out to physical mixed, after guaranteeing to mix, occur without chemical reaction.
The lubricant oil of selecting should possess the lubrication property that adapts to screw expander, possesses the character that power generation medium is dissolved each other simultaneously.Low-temperature electricity-generating medium+lubricant oil of the present invention, its operation temperature area and mixed proportion are in table one, and its preparation method is as follows: will vacuumize system, and then successively lubricant oil and low-temperature electricity-generating medium will directly be filled to system to scale.
Table one low-temperature electricity-generating medium composition and containing scale
As shown in Table 1, contaminated product power generation medium 2 of the present invention is CH2FCF3(HFC-134a) and CH3CClF2(HCFC-142b) in one or both.
Contaminated product power generation medium 2 described in the time that low-temperature heat source 1 warm area is 55-80 DEG C adopts CH2FCF3(HFC-134a).
Contaminated product power generation medium 2 described in the time that low-temperature heat source 1 warm area is 65-150 DEG C adopts CH3CClF2(HCFC-142b).
Contaminated product power generation medium 2 described in the time that low-temperature heat source 1 warm area is 55-150 DEG C adopts CH3CClF2(HCFC-142b)+CH2FCF3(HFC-134a).
Low-temperature electricity-generating medium ride quality result in table two table one
The working principle of the lubricated and cooling system of low-temperature heat power generation decompressor of the present invention: as shown in Figure 1, low-temperature heat source 1 is brought heat in the tube side of thermal source passage of flooded evaporator 3 by pipeline, and contaminated product power generation medium 2 enters in flooded evaporator 3 shell sides by the road.The low-temperature heat source 1 of contaminated product power generation medium 2 in flooded evaporator 3 and in thermal source passage carries out heat exchange and heats, and produces rich lubricant oil 4 and saturated steam state power generation medium 5.Saturated steam state power generation medium 5 enters twin-screw expander 7, drives three-phase synchronous generator 8 rotary electrifications; The liquid of the rich lubricant oil 4 that contains a small amount of power generation medium is transported to the shaft seal position of twin-screw expander 7 by the road, for the bearing of lubricated decompressor, and utilizes the interior contained cooling shaft seal of saturated steam state power generation medium 5 of frictional heat evaporation twin-screw expander 7.Two-way fluid mixes outflow twin-screw expander 7 again afterwards, starts new circulation.
Above embodiment is further detailed description to the present invention, is not limitation of the invention, and protection domain of the present invention is not subject to these embodiments' restriction, and protection scope of the present invention is as the criterion with claim.
Claims (10)
1. the lubricated and cooling system of a low-temperature heat power generation decompressor, include synchronous generator (8) and be connected with synchronous generator (8) for the twin-screw expander (7) that drives synchronous generator (8), it is characterized in that, also be provided with flooded evaporator (3), wherein, the thermal source passage inflow entrance (a) of described flooded evaporator (3) connects low-temperature heat source (1) by pipeline, the thermal source passage outflow opening (b) of flooded evaporator (3) connects low-temperature heat source reflow pipe (9), the inflow entrance (c) of the contaminated product power generation medium of flooded evaporator (3) connects contaminated product power generation medium (2) by medium pipeline, the outlet (6) of the saturated gaseous state power generation medium (5) producing after the heat exchange of flooded evaporator (3) connects the power generation medium entrance of twin-screw expander (7) by pipeline, be used for driving synchronous generator (8), on described flooded evaporator (3), be also provided with the rich lubricating oil outlet (11) that flows out isolated rich lubricant oil (4) from contaminated product power generation medium, described rich lubricating oil outlet (11) connects the lubricating oil inlet of twin-screw expander (7) by pipeline, for the bearing of lubricated twin-screw expander.
2. the lubricated and cooling system of low-temperature heat power generation decompressor according to claim 1, it is characterized in that, the other end of the low-temperature heat source reflow pipe (9) of the thermal source passage outflow opening (b) of described connection flooded evaporator (3) connects low-temperature heat source (1).
3. the lubricated and cooling system of low-temperature heat power generation decompressor according to claim 1, is characterized in that, described low-temperature heat source is the thermal source of 55-150 DEG C.
4. the lubricated and cooling system of low-temperature heat power generation decompressor according to claim 1, is characterized in that, the power generation medium outlet (10) of twin-screw expander (7) connects contaminated product power generation medium (2) by pipeline.
5. the lubricated and cooling system of low-temperature heat power generation decompressor according to claim 1, is characterized in that, described contaminated product power generation medium (2) comprises low-temperature electricity-generating medium and lubricant oil.
6. the lubricated and cooling system of low-temperature heat power generation decompressor according to claim 4, is characterized in that, described lubricant oil accounts for 3～15% of power generation medium.
7. the lubricated and cooling system of low-temperature heat power generation decompressor according to claim 5, is characterized in that, described contaminated product power generation medium (2) is CH2FCF3(HFC-134a) and CH3CClF2(HCFC-142b) in one or both.
8. the lubricated and cooling system of low-temperature heat power generation decompressor according to claim 5, is characterized in that, the contaminated product power generation medium (2) described in the time that low-temperature heat source (1) warm area is 55-80 DEG C adopts CH2FCF3(HFC-134a).
9. the lubricated and cooling system of low-temperature heat power generation decompressor according to claim 5, is characterized in that, the contaminated product power generation medium (2) described in the time that low-temperature heat source (1) warm area is 65-150 DEG C adopts CH3CClF2(HCFC-142b).
10. the lubricated and cooling system of low-temperature heat power generation decompressor according to claim 5, it is characterized in that, the contaminated product power generation medium (2) described in the time that low-temperature heat source (1) warm area is 55-150 DEG C adopts CH3CClF2(HCFC-142b)+CH2FCF3(HFC-134a).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310139473.5A CN104110274A (en) | 2013-04-19 | 2013-04-19 | Lubrication and cooling system of low-temperature thermal power generation expander |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310139473.5A CN104110274A (en) | 2013-04-19 | 2013-04-19 | Lubrication and cooling system of low-temperature thermal power generation expander |
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| CN104110274A true CN104110274A (en) | 2014-10-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971673A (en) * | 2016-06-30 | 2016-09-28 | 王斐芬 | Lubrication system for organic Rankine cycle single-screw expander |
| CN111594280A (en) * | 2020-06-23 | 2020-08-28 | 南京天加热能技术有限公司 | Double-turbine gas suspension ORC power generation system and control method |
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| US20020015652A1 (en) * | 2000-05-27 | 2002-02-07 | Dankwart Eiermann | Rotary piston engine |
| CN101194084A (en) * | 2005-06-10 | 2008-06-04 | 城市大学 | Expander lubrication in vapour power generating system |
| CN101994532A (en) * | 2010-10-25 | 2011-03-30 | 天津大学 | Screw cascade waste heat energy generating device and generating method |
| CN202108547U (en) * | 2011-06-09 | 2012-01-11 | 山东宏力空调设备有限公司 | Low-temperature generating unit |
| CN102639820A (en) * | 2009-12-14 | 2012-08-15 | 株式会社神户制钢所 | Screw expander system |
| CN202788963U (en) * | 2012-09-24 | 2013-03-13 | 泰山石膏股份有限公司 | Humid-air low-temperature electricity generating system in gypsum board production line |
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2013
- 2013-04-19 CN CN201310139473.5A patent/CN104110274A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20020015652A1 (en) * | 2000-05-27 | 2002-02-07 | Dankwart Eiermann | Rotary piston engine |
| CN101194084A (en) * | 2005-06-10 | 2008-06-04 | 城市大学 | Expander lubrication in vapour power generating system |
| CN102639820A (en) * | 2009-12-14 | 2012-08-15 | 株式会社神户制钢所 | Screw expander system |
| CN101994532A (en) * | 2010-10-25 | 2011-03-30 | 天津大学 | Screw cascade waste heat energy generating device and generating method |
| CN202108547U (en) * | 2011-06-09 | 2012-01-11 | 山东宏力空调设备有限公司 | Low-temperature generating unit |
| CN202788963U (en) * | 2012-09-24 | 2013-03-13 | 泰山石膏股份有限公司 | Humid-air low-temperature electricity generating system in gypsum board production line |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971673A (en) * | 2016-06-30 | 2016-09-28 | 王斐芬 | Lubrication system for organic Rankine cycle single-screw expander |
| CN111594280A (en) * | 2020-06-23 | 2020-08-28 | 南京天加热能技术有限公司 | Double-turbine gas suspension ORC power generation system and control method |
| CN111594280B (en) * | 2020-06-23 | 2023-09-19 | 南京天加能源科技有限公司 | Dual-turbine gas suspension ORC power generation system and control method |
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