CN105545392A - Double-effect recycling system for waste heat of supercharged air of large-scale ship diesel engine - Google Patents
Double-effect recycling system for waste heat of supercharged air of large-scale ship diesel engine Download PDFInfo
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- CN105545392A CN105545392A CN201410593531.6A CN201410593531A CN105545392A CN 105545392 A CN105545392 A CN 105545392A CN 201410593531 A CN201410593531 A CN 201410593531A CN 105545392 A CN105545392 A CN 105545392A
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- condenser
- preheater
- fresh water
- heater
- pressurized air
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Abstract
The invention discloses a double-effect recycling system for waste heat of supercharged air of a large-scale ship diesel engine. According to the technical scheme adopted by the invention, the double-effect recycling system consists of an ORC (organic rankine cycle) generating loop, a supercharged air circulating loop and a seawater desalting device. The supercharged air from a pre-heater passes through a heater for heating and evaporating seawater into steam, the steam ascends to pass through a filter screen and then is condensed into fresh water in a condenser, and the fresh water is introduced into a fresh water cabinet. Vacuum degree in an evaporating chamber is kept by a water injector; the lower part of the evaporating chamber is connected to a concentrated saltwater discharge tube, so that the concentrated saltwater is discharged to the outside of sides of a ship after passing through the pre-heater. One part of condensed seawater in the condenser is used as feeding seawater, and one part is used as discharge cooling water. The double-effect recycling system also produces fresh water required for ship routine while electric energy is generated by utilizing the waste heat of the supercharged air in a gradient mode, so that the fuel economy of the ship is greatly improved.
Description
Technical field
The invention belongs to combustion engine energy-saving technology, be specifically related to a kind of being combined with single effect distillation desalination technology by organic Rankine bottoming cycle, to the system and device that big marine diesel engine pressurized air waste heat reclaims.
Background technique
For large-scale diesel engine, its often only make use of input energy less than 50%, remaining energy is all by tail gas, and jacket-cooling water and pressurized air etc. are taken away, and cause the huge waste of the energy.Recycling at present for tail gas energy has a lot of research, and in fact the energy taken away of pressurized air is also very large, is almost the half of the waste heat energy that tail gas is taken away.Organic Rankine bottoming cycle (ORC) is a kind of effective means reclaiming low-temperature heat source energy, if the waste heat energy of this part low-temperature heat source can be reclaimed by ORC system, will significantly improve the efficiency of diesel engine.In addition, research shows the best results that will make ORC system, does not need whole waste heats of thermal source.
In boats and ships oceangoing voyage, its personnel equipment needs a large amount of fresh water, if the fresh water depended merely on entrained by boats and ships self is the fresh water needs that can not meet boats and ships far away, and fresh water is stored in the infection being easily subject to bacterium in the process of water tank, affects water quality.Therefore, big-and-middle-sized ocean going vessel is all furnished with sea water desalinating unit.Current method for desalting seawater mainly contains: the way of distillation, hyperfiltration, electrolysis method etc.Wherein the way of distillation is owing to adopting vacuum distillation, and evaporating temperature often only has 50 degrees centigrade, therefore can with the low temperature exhaust heat source of diesel engine as its heating source, and not need to consume extra energy.
For above-mentioned situation, if the waste heat energy of energy reasonable distribution pressurized air, the output work of ORC system not only can be made to reach maximum, can also distilling sea water desalter be driven, meet the fresh water demand of boats and ships, substantially increase the efficiency of energy utilization of diesel engine.
Summary of the invention
To be solved by this invention is the utilization ratio that can improve diesel oil waste heat in big-and-middle-sized ocean going vessel, produces electric energy and meets boats and ships fresh water demand.In order to solve the problem, the present invention has supplied a kind of big marine diesel engine pressurized air waste heat double-effect recovery system, organic Rankine bottoming cycle is combined with single effect distillation formula desalination technology, utilize the waste heat energy of pressurized air to drive organic Rankine bottoming cycle to produce electric energy and single effect distillation sea water desalinating unit generation fresh water simultaneously, not only can take full advantage of the waste heat of pressurized air, improve the efficiency of diesel engine, the fresh water demand of boats and ships can also be met.
Technological scheme provided by the invention is: big marine diesel engine pressurized air waste heat double-effect recovery system, is made up of ORC power generation circuit, pressurized air circulation loop and sea water desalinating unit;
Wherein ORC power generation circuit is connected to form successively by condenser, recycle pump, regenerator liquid refrigerant side, preheater working medium side, vaporizer working medium side, decompressor and regenerator exhaust steam side;
Pressurized air circulation loop is connected and composed successively by evaporator air side, preheater air side, heater air side, cooler air side, diesel engine;
Sea water desalinating unit is made up of the gas side of preheater, heater, jet pipe, filter screen, condenser, water ejector, the brine side of preheater, fresh water tank, brine discharge pipe, vaporization chamber, and wherein the gas side of heater, jet pipe, filter screen, condenser are positioned at vaporization chamber successively; Preheater is connected with the gas side of heater, and filter screen is connected with condenser, and the steam produced in heater condenses into fresh water after rising through filter screen within the condenser, and fresh water is communicated with fresh water tank by fresh water pipe within the condenser; The entrance of condenser passes into seawater, and condensator outlet divides two-way, and outboard, lead up to preheater seawater side is connected with the jet pipe in vaporization chamber a-road-through; Water ejector is positioned at vaporization chamber top, and vaporization chamber bottom is connected to brine discharge pipe, and brine discharge pipe side is connected with the brine side of preheater.
Above-mentioned big marine diesel engine pressurized air waste heat double-effect recovery system, wherein ORC power generation circuit is organic Rankine bottoming cycle, and described ORC power generation circuit and the thermal source of sea water desalinating unit are pressurized air.
In addition, in above-mentioned big marine diesel engine pressurized air waste heat double-effect recovery system, described pressurized air have passed vaporizer successively, preheater, and heater, and heat is by cascade utilization.
In ORC power generation circuit, after being recycled pump pressurization from condenser liquid refrigerant out, be introduced into regenerator be inflated machine after working medium exhaust steam tentatively heat, then enter preheater and be pressurized air heating to saturated liquid state, enter again in vaporizer and be pressurized air heating and become saturated vapour, then enter expansion work in decompressor, make decompressor drive motor produce electric energy, exhaust steam after expansion enters condenser and is condensed into liquid state after entering the preliminary preheating liquid working medium of regenerator.Reach maximum due to the output work of this ORC system will be made, do not need the waste heat of whole pressurized air, therefore when pressurized air from preheater out after, still there is higher temperature, so continued to pass into heating seawater in the heater of single effect distillation formula sea water desalinating unit.
In sea water desalinating unit, the seawater of known mass flow, through condenser, carrys out the steam of condensation evaporation of seawater generation wherein as low-temperature receiver, Absorption by Sea Water steam-condensation releases heat, and temperature raises.Through the further preheating of brine that a seawater part for preheating is first remaining after preheater is by evaporation of seawater, then enter in heater and be pressurized air heating evaporation, a part discharges outboard as cooling water in addition; The steam produced in vaporization chamber rises in sea water desalinating unit, isolates the entrained globule through filter screen, arrives in condenser and is condensed into fresh water, then enter in fresh water tank for subsequent use; In vaporization chamber, unevaporated concentration of seawater raises becomes concentrated seawater, after preheater and pan feeding seawater to make heat exchange, discharge outboard. and the non-condensible gas in vaporization chamber, is absorbed by water ejector, to keep the evaporating pressure in vaporization chamber.
For pressurized air, it is successively by vaporizer, preheater, and after heater, temperature does not also drop to the temperature needed for diesel engine import, so finally enter diesel engine again finally by after cooler cooling, forms the loop of pressurized air.
More university degree system effect is more obvious to it should be noted that diesel engine power, and therefore the present invention is suitable for large-scale diesel engine.
Feature of the present invention and beneficial effect be, the cascade utilization waste heat of pressurized air, gives full play to the effect of this part waste heat, not only produce electric energy with it, also meet the fresh water demand of boats and ships with it, and then improve the capacity usage ratio of boat diesel engine.
Accompanying drawing explanation
Fig. 1 is inventive principle structural representation of the present invention.
Wherein:
1. condenser 2. pump 3. preheater 4. vaporizer
5. decompressor 6. regenerator 7. heater 8. jet pipe
9. filter screen 10. condenser 11. water ejector 12. preheater
13. cooler 14. diesel engine 15. fresh water tank 16. brine discharge pipes
Embodiment
Principle of the present invention and system to be described further by embodiment below in conjunction with accompanying drawing.It should be noted that the present embodiment is narrative, but not be determinate, do not limit protection scope of the present invention with this.
Big marine diesel engine waste heat double-effect recovery system, its system structure characteristic is: condenser 1, recycle pump 2, regenerator 6 liquid refrigerant side, preheater 3 working medium side, vaporizer 4 working medium side, decompressor 5, and regenerator 6 exhaust steam side connects to form ORC power generation circuit successively.Vaporizer 4 air side, preheater 3 air side, heater 7 air side, cooler 13 air side connects and composes the part of pressurized air circulation loop outside diesel engine successively.For sea water desalinating unit, directly carry out heat exchange by the gas side of heater 7 and seawater from preheater 3 pressurized air out, after the steam of generation rises through filter screen 9, in condenser 10, condense into fresh water; Fresh water pipe is connected to condenser 10, is drawn out in fresh water tank 15 by condensation fresh water.Vaporization chamber top is connected to water ejector 11, is maintained the degree of vacuum in vaporization chamber by water ejector 11; Vaporization chamber bottom is connected to brine discharge pipe 16, and have passed the brine side of preheater 12, finally discharged to outboard.Condenser 10 entrance connecting the sea water, an outlet point two-way, a-road-through outboard, leads up to preheater 12 seawater rear flank, is connected with the jet pipe 8 in vaporization chamber.
Working procedure of the present invention is: diesel engine supercharging air first directly enters vaporizer 4 and preheater 3 successively, the gas that working medium is heated into High Temperature High Pressure is entered decompressor 5 and does work, decompressor driving electrical power generators.Still there is portion of energy from preheater 3 pressurized air out, passed into heating seawater in heater 7, make evaporation of seawater become steam.Steam arrives condenser 10 rise through the filter screen 9 elimination globule in vaporization chamber after, flows out after being condensed into fresh water here, enters in fresh water tank 15; Brine after evaporation is discharged from brine discharge pipe 16 bottom vaporization chamber, by preheater 12 preheating, discharges outboard.After seawater condensing fresh water in condenser 10, temperature raises, and a part discharges outboard, and a part enters the jet pipe 8 in vaporization chamber by preheater 12 seawater side, sprays in vaporization chamber by thermal evaporation.Vaporization chamber top is connected with water ejector 11, to maintain the degree of vacuum in vaporization chamber.
Above invention has been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (3)
1. big marine diesel engine pressurized air waste heat double-effect recovery system, is characterized in that being made up of ORC power generation circuit, pressurized air circulation loop and sea water desalinating unit;
Wherein ORC power generation circuit is connected to form successively by condenser, recycle pump, regenerator liquid refrigerant side, preheater working medium side, vaporizer working medium side, decompressor and regenerator exhaust steam side;
Pressurized air circulation loop is connected and composed successively by evaporator air side, preheater air side, heater air side, cooler air side, diesel engine;
Sea water desalinating unit is made up of the gas side of preheater, heater, jet pipe, filter screen, condenser, water ejector, the brine side of preheater, fresh water tank, brine discharge pipe, vaporization chamber, and wherein the gas side of heater, jet pipe, filter screen, condenser are positioned at vaporization chamber successively; Preheater is connected with the gas side of heater, and filter screen is connected with condenser, and the steam produced in heater condenses into fresh water after rising through filter screen within the condenser, and fresh water is communicated with fresh water tank by fresh water pipe within the condenser; The entrance of condenser passes into seawater, and condensator outlet divides two-way, and outboard, lead up to preheater seawater side is connected with the jet pipe in vaporization chamber a-road-through; Water ejector is positioned at vaporization chamber top, and vaporization chamber bottom is connected to brine discharge pipe, and brine discharge pipe side is connected with the brine side of preheater.
2., according to big marine diesel engine pressurized air waste heat double-effect recovery system according to claim 1, it is characterized in that described ORC power generation circuit is organic Rankine bottoming cycle, the thermal source of described ORC power generation circuit and sea water desalinating unit is pressurized air.
3., according to the big marine diesel engine pressurized air waste heat double-effect recovery system described in claim 1 or 2, it is characterized in that described pressurized air have passed vaporizer successively, preheater, and heater, heat is by cascade utilization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410593531.6A CN105545392A (en) | 2014-10-29 | 2014-10-29 | Double-effect recycling system for waste heat of supercharged air of large-scale ship diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410593531.6A CN105545392A (en) | 2014-10-29 | 2014-10-29 | Double-effect recycling system for waste heat of supercharged air of large-scale ship diesel engine |
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| CN105545392A true CN105545392A (en) | 2016-05-04 |
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| CN201410593531.6A Pending CN105545392A (en) | 2014-10-29 | 2014-10-29 | Double-effect recycling system for waste heat of supercharged air of large-scale ship diesel engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145407A (en) * | 2019-05-31 | 2019-08-20 | 广东海洋大学 | Device based on marine diesel engine cogeneration and sea water desalination |
| CN110439641A (en) * | 2019-07-19 | 2019-11-12 | 中交机电工程局有限公司 | Boat-carrying cold energy use electricity generating and supplying system suitable for FSRU |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6051590A (en) * | 1983-08-30 | 1985-03-23 | Mitsui Eng & Shipbuild Co Ltd | Fresh water making apparatus due to utilization of high temperature waste heat |
| CN103397954A (en) * | 2013-07-29 | 2013-11-20 | 广州中国科学院先进技术研究所 | Diesel engine waste heat utilization control system |
| US20140075945A1 (en) * | 2012-09-18 | 2014-03-20 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | System combining power generation apparatus and desalination apparatus |
| CN103951005A (en) * | 2014-04-30 | 2014-07-30 | 集美大学 | Zero-discharge multiple technology coupled seawater desalination device and method |
-
2014
- 2014-10-29 CN CN201410593531.6A patent/CN105545392A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6051590A (en) * | 1983-08-30 | 1985-03-23 | Mitsui Eng & Shipbuild Co Ltd | Fresh water making apparatus due to utilization of high temperature waste heat |
| US20140075945A1 (en) * | 2012-09-18 | 2014-03-20 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | System combining power generation apparatus and desalination apparatus |
| CN103397954A (en) * | 2013-07-29 | 2013-11-20 | 广州中国科学院先进技术研究所 | Diesel engine waste heat utilization control system |
| CN103951005A (en) * | 2014-04-30 | 2014-07-30 | 集美大学 | Zero-discharge multiple technology coupled seawater desalination device and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145407A (en) * | 2019-05-31 | 2019-08-20 | 广东海洋大学 | Device based on marine diesel engine cogeneration and sea water desalination |
| CN110145407B (en) * | 2019-05-31 | 2021-10-26 | 广东海洋大学 | Device based on ship diesel engine waste heat power generation and sea water desalination |
| CN110439641A (en) * | 2019-07-19 | 2019-11-12 | 中交机电工程局有限公司 | Boat-carrying cold energy use electricity generating and supplying system suitable for FSRU |
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Application publication date: 20160504 |
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