CN105641962B - Falling film evaporator and the organic Rankine cycle power generation system using the falling film evaporator - Google Patents
Falling film evaporator and the organic Rankine cycle power generation system using the falling film evaporator Download PDFInfo
- Publication number
- CN105641962B CN105641962B CN201610147428.8A CN201610147428A CN105641962B CN 105641962 B CN105641962 B CN 105641962B CN 201610147428 A CN201610147428 A CN 201610147428A CN 105641962 B CN105641962 B CN 105641962B
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- Prior art keywords
- oil
- film evaporator
- falling film
- cylinder
- float
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0082—Regulation; Control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
Abstract
Falling film evaporator and the organic Rankine cycle power generation system using the falling film evaporator.The invention discloses a kind of falling film evaporator and a kind of organic Rankine cycle power generation system, wherein, falling film evaporator includes cylinder, working medium entrances and sender property outlet are provided with the cylinder, distributor and heat exchanger tube are provided with the cylinder, the bottom of the cylinder is provided with oil return apparatus, and the oil return apparatus includes that the float oil catcher in the cylinder body bottom in oil-enriched layer can be floated on, the float oil catcher is connected with oil-collecting delivery line, and the oil-collecting delivery line is connected to outside the cylinder.The falling film evaporator and organic Rankine cycle power generation system of the present invention, oil return apparatus is simple in construction, oil return is reliable.
Description
Technical field
The present invention relates to electricity generation system technical field, specifically, is related to a kind of falling film evaporator and one kind utilizes the drop
The organic Rankine cycle power generation system of film evaporator.
Background technology
At present, falling film evaporator has that heat transfer property is excellent, the advantages such as working medium charging amount is few, heat exchange efficiency is high, obtains
Widely apply.
Existing falling film evaporator mainly has two kinds, and reference picture 1, the first is hybrid-type falling film evaporator 1, sets one
Layer assignment plate 12, an achievement unit are in charge of beam falling film type evaporation, and remaining tube bank is evaporated for full-liquid type, and bottom sets oil return opening 11.This
The falling film evaporator of kind structure, due to falling film evaporation can not be fully achieved, working medium is caused to be accumulated in exchanger base, heat exchange efficiency
It is low.
Reference picture 2, second is the falling film evaporator 1 restrained entirely, sets multilayer distribution plate 12, realizes that full tube bank falling liquid film steams
Hair, bottom set oil return opening 11.The falling film evaporator of such a structure, bottom heat exchanger tube are in gaseous state state of siege, cause " dry
Spot " problem, falling film evaporator overall heat exchange performance is seriously reduced, in order to avoid " dry spot " problem, spray is crossed using top working medium
Mode, can inevitably occur the liquid refrigerant of certain altitude in exchanger base again.And run in falling film evaporator
Cheng Zhong, the continuous evaporation of working medium, falling film evaporator bottom lubricating oil is caused to build up, base of evaporator forms lubricating oil and work
Matter mixture, so as to form poor oil reservoir and oil-enriched layer.To avoid accumulation of the lubricating oil in evaporator, existing falling film evaporator is adopted
With the fixed oil return of oil return opening 11, base of evaporator is such as arranged on, bottom is often poor oil reservoir, causes oil return part working medium content mistake
Height, reduce lubricant effect；Such as it is arranged on some upper position, liquid level is equally from poor oil reservoir oil return, such as when being higher than the position
Fruit liquid level is less than the position, and causing can not oil return.
Organic Rankine cycle power generation system is a kind of most commonly seen generating heating power of application less than 200 DEG C of low temperature heat energies
The circulatory system.Fig. 3 is the schematic flow sheet of existing organic Rankine cycle power generation system, and reference picture 3, existing organic Rankine follows
Ring electricity generation system includes evaporator 1, expanding machine 2, generator 3, condenser 4, working medium pump 5, oil eliminator 6, oil pump 7.
The existing external oil mode of organic Rankine bottoming cycle TRT generally use using enclosed expansion machine, it will lubricate
Oil is separated with working medium.Reference picture 3, oil eliminator 6 is set in the outlet of expanding machine, lubricating oil separation is come out, and in oil
Oil pump 7 is set after separator, and lubricating oil boosting, which is transported in organic Rankine cycle power generation system, using oil pump 7 needs what is lubricated
High-pressure section.Existing this circuit is complicated, and installs oil eliminator 6 in the exit of expanding machine 2, can cause to expand
The outlet back pressure of machine 2 increases, and reduces the expansion power of expanding machine 2.Lubricating oil is risen to from low pressure in addition, it is necessary to add oil pump 7
High pressure, add the in-fighting of whole electricity generation system.
The content of the invention
First technical problem to be solved by this invention be：There is provided and a kind of provided with oil return apparatus simple in construction and return
The reliable falling film evaporator of oil.
Second technical problem to be solved by this invention be：There is provided that a kind of oil return apparatus is simple in construction, oil return is reliable
Organic Rankine cycle power generation system.
To solve above-mentioned first technical problem, the technical scheme is that：
A kind of falling film evaporator, including cylinder, are provided with working medium entrances and sender property outlet on the cylinder, in the cylinder
Distributor and heat exchanger tube are provided with, the bottom of the cylinder is provided with oil return apparatus, and the oil return apparatus includes floating on
Float oil catcher in the cylinder body bottom in oil-enriched layer, the float oil catcher are connected with oil-collecting delivery line, and the oil-collecting is led
Outlet pipe is connected to outside the cylinder.
Preferably, the float oil catcher includes arc, and two side portions of the arc are provided with some oil collecting holes, institute
State and remittance oilhole is provided with the bottom centre of arc.
Preferably, the remittance oilhole is fixedly connected with remittance oil pipe.
Preferably, it is connected with ball float on the arc.
Preferably, the float oil catcher is the float oil catcher of fluorine-resistant material.
Preferably, it is connected with elastic telescopic pipe between the remittance oil pipe and the oil-collecting delivery line.
Preferably, the bottom for converging oil pipe is slidably connected with the oil-collecting delivery line.
Preferably, the cylinder inner top is provided with top dispenser, and middle part is provided with intermediate distributor in the cylinder, described
Heat exchange of top part pipe is provided between top dispenser and the intermediate distributor, intermediate heat transfer is provided with below the intermediate distributor
Pipe, the cylinder inner bottom part are provided with bottom heat exchanger tube.
To solve above-mentioned second technical problem, the technical scheme is that：
A kind of organic Rankine cycle power generation system, including falling film evaporator, expanding machine, condenser and the working medium set gradually
Pump, the falling film evaporator are above-mentioned falling film evaporator, and the oil-collecting delivery line is connected to the expanding machine by pipeline
Lubricant passage way entrance.
Preferably, the connecting pipe between the oil-collecting delivery line and the lubricant passage way entrance of the expanding machine is provided with oil
Cooler.
After employing above-mentioned technical proposal, the beneficial effects of the invention are as follows：
The falling film evaporator of the present invention, oil return apparatus use can float on the float in oil-enriched layer in the cylinder body bottom
Oil catcher, the float oil catcher are connected with oil-collecting delivery line, and the oil-collecting delivery line is connected to outside the cylinder.Steamed in falling liquid film
Send out in device running, the lubricating oil and working medium of the accumulation of falling film evaporator bottom, because the density of lubricating oil is less than working medium, mixing
Lubricating oil and working medium would generally be divided into the oil-enriched layer on upper strata and the poor oil reservoir of bottom, float oil catcher floats on rich oil always
In layer, can ensure that float oil catcher collects lubricating oil in oil-enriched layer, lubricating oil after collection in falling film evaporator pressure and
Under the driving of gravity, falling film evaporator is discharged by oil-collecting delivery line.Such a circuit, greatly reduce work in oil return part
The content of matter, improve the lubricant effect of lubricating oil and reduce the energy loss of working medium.
In the falling film evaporator of the present invention, cylinder inner bottom part is provided with bottom heat exchanger tube, by bottom heat exchanger tube in cylinder
The lubricating oil and working medium of bottom accumulation continue to heat, and are evaporated with the working medium for further accumulating bottom, improve evaporation effect.
The organic Rankine cycle power generation system of the present invention, save expander outlet gs-oil separator, scavenge oil pump, structure letter
Singly, the dynamic number of devices of reduction, strengthening system security reliability, the cost of unit is reduced.Meanwhile it will be steamed using the effect of pressure differential
The lubricating oil sent out in device is sent into expanding machine, and expanding machine is lubricated, makes full use of the pressure differential inside system circulation to act on, and drops
The in-fighting of low unit.Using above-mentioned falling film evaporator, the content of working medium in oil return part is greatly reduced, improves lubricating oil
Lubricant effect and system effectiveness.
In the organic Rankine cycle power generation system of the present invention, the lubricant passage way entrance of oil-collecting delivery line and the expanding machine it
Between connecting pipe be provided with oil cooler.Oil cooler can be effectively reduced the temperature of the lubricating oil of falling film evaporator discharge
Degree, ensure that lubricating oil has rational lubricant viscosity and temperature, improve lubricating oil and moisten into follow-up expanding machine is interior in road of changing oil
Lubrication afterwards, cooling effect.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural representation of existing hybrid falling film evaporator；
Fig. 2 is the structural representation of existing high-fall film evaporator；
Fig. 3 is the structural representation of existing organic Rankine cycle power generation system；
Fig. 4 is the structural representation of the falling film evaporator in the present invention；
Fig. 5 is the structural representation of the float oil catcher in Fig. 4；
Fig. 6 is the structural representation of the organic Rankine cycle power generation system in the present invention；
In figure：1st, falling film evaporator；11st, oil return opening；12nd, distribution plate；2nd, expanding machine；3rd, generator；4th, condenser；5th, work
Matter pump；6th, oil eliminator；7th, oil pump；8th, falling film evaporator；81st, cylinder；82nd, working medium entrances；83rd, sender property outlet；84th, top
Orchestration；85th, heat exchange of top part pipe；86th, intermediate distributor；87th, intermediate heat transfer pipe；88th, bottom heat exchanger tube；89th, oil return apparatus；891、
Float oil catcher；8911st, arc；8912nd, oil collecting hole；8913rd, remittance oilhole；8914th, remittance oil pipe；892nd, oil-collecting delivery line；
893rd, elastic telescopic pipe；895th, ball float；9th, oil cooler；10th, expanding machine；13rd, condenser；14th, working medium pump；15th, check valve；
16th, generator.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Reference picture 4, falling film evaporator of the invention, including cylinder 81, the upper end of cylinder 81 are provided with the He of working medium entrances 82
Sender property outlet 83, distributor and heat exchanger tube is provided with cylinder 81, the bottom of cylinder 81 is provided with oil return apparatus 89, oil return apparatus
89 include floating on the float oil catcher 891 in the oil-enriched layer of the bottom of cylinder 81, and float oil catcher is connected with oil-collecting export
Pipe 892, oil-collecting delivery line 892 are connected to outside cylinder 81.
Distributor includes the top dispenser 84 located at the inner top of cylinder 81, the intermediate distributor at middle part in cylinder 81
86, heat exchange of top part pipe 85 is provided between top dispenser 84 and intermediate distributor 86, intermediate heat transfer is provided with below intermediate distributor
Pipe 87, the inner bottom part of cylinder 81 are provided with bottom heat exchanger tube 88.In the actual moving process of falling film evaporator 8, the working medium of liquid is led to
Cross working medium entrances to enter in cylinder 81, evenly distributed by top dispenser 84, ensure the uniformity of falling liquid film, the working medium of liquid is led to
The mode for crossing falling liquid film falls and exchanged heat on the surface of heat exchange of top part pipe 85, and by heat exchange, the working medium of a part of liquid is changed into from liquid
Gaseous state rises, and the unboiled liquid refrigerant of another part continues to flow downward under gravity, entered by intermediate distributor 86
One step evenly distributes, and falling liquid film further exchanges heat to the surface of intermediate heat transfer pipe 87.Intermediate distributor 86 and intermediate heat transfer pipe 87 can roots
Need to set one layer or multilayer according to specific.Lubricating oil and unboiled working medium in the inner bottom part of cylinder 81 accumulation liquid, pass through
The lubricating oil and working medium that bottom heat exchanger tube 88 is accumulated to the inner bottom part of cylinder 81 continue to heat, further accumulate the bottom of cylinder 81
Working medium be evaporated, improve evaporation effect.The gaseous working medium of all evapn is discharged from the sender property outlet of cylinder upper end.
Reference picture 5, float oil catcher 891 include arc 8911, and two side portions of arc 8911 are provided with some oil-collectings
Hole 8912, it is provided with the bottom centre of arc 8911 and converges oilhole 8913, the oilhole 8913 that converges, which is fixedly connected with, converges oil pipe 8914.
Converge and elastic telescopic pipe 893 is connected between oil pipe 8914 and oil-collecting delivery line 892, or the lower end of remittance oil pipe 8914
Portion is slidably connected with oil-collecting delivery line 892.
Specifically, can be by selecting the material of float oil catcher 891 either to make its hollow setting or in arc
Upper setting hollow float 895, using the buoyancy that ball float 895 is larger, enables float oil catcher 891 to float on the inner bottom part of cylinder 81
Oil-enriched layer in so that the oil collecting hole 8912 for two side portions that the lubricating oil of oil-enriched layer passes through arc 8911, along arc
8911 uper side surface collects downwards, focuses on remittance oilhole 8913, flows into remittance oil pipe 8914, then passes through oil-collecting delivery line again
Outside the cylinder 81 of 892 discharge falling film evaporators 8.
In the running of falling film evaporator 8, the lubricating oil and working medium of the accumulation of the bottom of falling film evaporator 8, due to lubrication
The density of oil is less than working medium, and the lubricating oil and working medium of mixing would generally be divided into the oil-enriched layer on upper strata and the poor oil reservoir of bottom, floats
Sub- oil catcher 891 is floated in oil-enriched layer always, can ensure that float oil catcher 891 collects lubricating oil in oil-enriched layer, after collection
Lubricating oil in falling film evaporator 8 under the driving of pressure and gravity, pass through oil-collecting delivery line 892 and discharge falling film evaporator 8.This
Kind circuit, the content of working medium in oil return part is greatly reduced, improve the lubricant effect and system effectiveness of lubricating oil.
Reference picture 6, organic Rankine cycle power generation system of the invention, including falling film evaporator 8, the expanding machine set gradually
10th, condenser 13 and working medium pump 14, expanding machine 10 connect generator 16, are provided between working medium pump 14 and falling film evaporator 8 unidirectional
Valve 15, falling film evaporator 8 use above-mentioned falling film evaporator, and oil-collecting delivery line 892 is connected to expanding machine 10 by pipeline and lubricated
Oil circuit entrance.The lubricating oil of lubricated expansion machine moving component mixes with the working medium after expansion in expander outlet, and enters together
In condenser, then through working medium pump lubricating oil is pumped into evaporator together with working medium, into next circulation.Wherein, falling liquid film
Evaporator 8 utilizes above-mentioned falling film evaporator, greatly reduces the content of working medium in oil return part, improves the profit for lubricating oil of knowing clearly
Sliding effect and system effectiveness.
In the organic Rankine cycle power generation system of the present invention, the lubricant passage way entrance of oil-collecting delivery line 892 and expanding machine 10
Between connecting pipe be provided with oil cooler 9.Oil cooler 9 can be effectively reduced the lubricating oil of the discharge of falling film evaporator 8
Temperature, ensure that lubricating oil has rational lubricant viscosity and a temperature, improve lubricating oil and enter profit in follow-up expanding machine 10 and changes
Lubrication, cooling effect after in oil circuit.
Citing described above for best mode for carrying out the invention, wherein the part do not addressed in detail is that this area is common
The common knowledge of technical staff.Protection scope of the present invention is defined by the content of claim, any technology based on the present invention
The equivalent transformation for enlightening and carrying out, also within protection scope of the present invention.
Claims (9)
1. falling film evaporator, including cylinder, working medium entrances and sender property outlet are provided with the cylinder, are provided with the cylinder
Distributor and heat exchanger tube, it is characterised in that：The bottom of the cylinder is provided with oil return apparatus, and the oil return apparatus includes floating
The float oil catcher in oil-enriched layer in the cylinder body bottom is moved, the float oil catcher is connected with oil-collecting delivery line, the collection
Oily delivery line is connected to outside the cylinder；
The float oil catcher includes arc, and two side portions of the arc are provided with some oil collecting holes, the arc
Remittance oilhole is provided with bottom centre.
2. falling film evaporator according to claim 1, it is characterised in that：The remittance oilhole is fixedly connected with remittance oil pipe.
3. falling film evaporator according to claim 2, it is characterised in that：Ball float is connected with the arc.
4. falling film evaporator according to claim 2, it is characterised in that：The float oil catcher is the float of fluorine-resistant material
Oil catcher.
5. falling film evaporator according to claim 2, it is characterised in that：Between the remittance oil pipe and the oil-collecting delivery line
It is connected with elastic telescopic pipe.
6. falling film evaporator according to claim 2, it is characterised in that：Led with the oil-collecting bottom for converging oil pipe
Outlet pipe is slidably connected.
7. according to the falling film evaporator described in any one of claim 1 to 6, it is characterised in that：The cylinder inner top is provided with top
Part orchestration, the interior middle part of the cylinder are provided with intermediate distributor, are provided between the top dispenser and the intermediate distributor
Heat exchange of top part pipe, the intermediate distributor lower section are provided with intermediate heat transfer pipe, and the cylinder inner bottom part is provided with bottom heat exchanger tube.
8. organic Rankine cycle power generation system, including falling film evaporator, expanding machine, condenser and the working medium pump set gradually, its
It is characterised by：The falling film evaporator is the falling film evaporator described in any one of claim 1 to 7, and the oil-collecting delivery line leads to
Piping is connected to the expanding machine lubricant passage way entrance.
9. organic Rankine cycle power generation system according to claim 8, it is characterised in that：The oil-collecting delivery line with it is described
Connecting pipe between the lubricant passage way entrance of expanding machine is provided with oil cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610147428.8A CN105641962B (en) | 2016-03-15 | 2016-03-15 | Falling film evaporator and the organic Rankine cycle power generation system using the falling film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610147428.8A CN105641962B (en) | 2016-03-15 | 2016-03-15 | Falling film evaporator and the organic Rankine cycle power generation system using the falling film evaporator |
Publications (2)
| Publication Number | Publication Date |
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| CN105641962A CN105641962A (en) | 2016-06-08 |
| CN105641962B true CN105641962B (en) | 2018-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610147428.8A Active CN105641962B (en) | 2016-03-15 | 2016-03-15 | Falling film evaporator and the organic Rankine cycle power generation system using the falling film evaporator |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269157B (en) * | 2018-11-01 | 2024-04-05 | 珠海格力电器股份有限公司 | Evaporator, ejector reflux system of evaporator and air conditioning unit |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000010102A (en) * | 1998-07-30 | 2000-02-15 | 황한규 | Oil recovering device of turbo freezer |
| CN2784831Y (en) * | 2005-01-12 | 2006-05-31 | 南京天加空调设备有限公司 | Flooded evaporator with oil return device |
| CN100595496C (en) * | 2008-10-07 | 2010-03-24 | 上海环球制冷设备有限公司 | Drop raining mode film-type evaporator apparatus and using method thereof |
| CN102072594A (en) * | 2009-11-19 | 2011-05-25 | 同方人工环境有限公司 | Refrigerating unit with high-efficient oil return flooded evaporator |
| IT1400467B1 (en) * | 2010-03-25 | 2013-06-11 | Nasini | PLANT FOR ENERGY PRODUCTION BASED ON THE RANKINE CYCLE WITH ORGANIC FLUID. |
| CN102000437B (en) * | 2010-09-03 | 2013-02-13 | 广东工业大学 | Falling film evaporator with gas-liquid separating and membrane-distributing functions |
| CN202119170U (en) * | 2011-05-27 | 2012-01-18 | 重庆美的通用制冷设备有限公司 | Oil taking device of flooded evaporator |
| CN102914097A (en) * | 2012-11-05 | 2013-02-06 | 重庆美的通用制冷设备有限公司 | Full-falling-film evaporator and water chilling unit |
| CN103727707A (en) * | 2013-12-30 | 2014-04-16 | 麦克维尔空调制冷(武汉)有限公司 | Full-falling-film evaporator with double refrigerant distribution devices |
| CN205549626U (en) * | 2016-03-15 | 2016-09-07 | 山东科灵节能装备股份有限公司 | Falling film evaporation ware and utilize organic rankine cycle power generation system of this falling film evaporation ware |
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- 2016-03-15 CN CN201610147428.8A patent/CN105641962B/en active Active
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Denomination of invention: Falling film evaporator and organic Rankine cycle power generation system utilizing the falling film evaporator Effective date of registration: 20230915 Granted publication date: 20180323 Pledgee: Anqiu Sub branch of China Construction Bank Corp. Pledgor: SHANDONG COOLING ENERGY SAVING EQUIPMENT Co.,Ltd. Registration number: Y2023980056953 |