CN203629121U - Cryogenic fluid cold energy utilization system - Google Patents
Cryogenic fluid cold energy utilization system Download PDFInfo
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- CN203629121U CN203629121U CN201320825074.XU CN201320825074U CN203629121U CN 203629121 U CN203629121 U CN 203629121U CN 201320825074 U CN201320825074 U CN 201320825074U CN 203629121 U CN203629121 U CN 203629121U
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Abstract
The utility model discloses a cryogenic fluid cold energy utilization system, and relates to the field of applying the cold energy of liquid oxygen, liquid nitrogen and liquid natural gas to electricity generation, refrigeration, cold storage and refrigeration air conditioners. The cryogenic fluid cold energy utilization system comprises low-temperature and medium-temperature refrigerant closed type circulation and a cryogenic fluid cold energy release process. The low-temperature circulation comprises heat exchangers from the first one to the third one, a second liquid booster pump and an expansion generator, the medium-temperature circulation comprises the second heat exchanger, the third heat exchanger and a third liquid booster pump, and the cryogenic fluid cold energy release process comprises a first liquid booster pump and the heat exchangers from the first one to the third one. The cold energy of cryogenic fluid is finally used by refrigerating medium in the third heat exchanger and the expansion generator, the cold energy of the refrigerating medium can be used for refrigeration, cold storage and air conditioner refrigeration, and the generated electricity of the expansion generator can meet the need of the system and has a large amount of surplus, so that the cold energy of the cryogenic fluid can be fully used. The cryogenic fluid cold energy utilization system can make full use of the cold energy of the cryogenic fluid, obviously improve the energy conversion efficiency, reduce emission of pollutants, and improve the performance of the system.
Description
Technical field
The utility model relates to the cold energy use of the cryogens such as liquid oxygen, liquid nitrogen, liquefied natural gas, also relates to the utilization of generating, freezing, refrigeration, refrigeration and air-conditioning technical, is specially a kind of cryogen cold energy use system.
Background technology
The product liquid oxygen of air separation industry, liquid nitrogen have purposes widely, in the industrial department industry such as metallurgy, chemical industry, oil, machinery, mining, food, military affairs, play an important role; Liquefied natural gas, as a kind of important energy, has a wide range of applications in the world.But liquid oxygen, liquid nitrogen and liquefied natural gas temperature are extremely low, under normal pressure, the temperature of liquefied natural gas is 110K left and right, the temperature of liquid oxygen is 90K left and right, the temperature of liquid nitrogen is 77K left and right, need before use they gasifications and re-heat to arrive normal temperature, current conventional way is to adopt seawater or air or even vapours to carry out re-heat to it, and the stored huge cold of liquid oxygen, liquid nitrogen and liquefied natural gas is wasted in this process, and economy is very poor.As usually depress cold that oxygen loses from saturated liquid phase re-heat to 20 ℃ up to 400kJ/kg left and right, the cold that under normal pressure, nitrogen loses from saturated liquid phase re-heat to 20 ℃ is up to 430kJ/kg left and right, and the cold that under normal pressure, liquefied natural gas loses from saturated liquid phase re-heat to 20 ℃ is up to 890kJ/kg left and right.
On the other hand, there is very large demand in freezing, refrigeration and air conditioner refrigerating field to cold.At present in these fields, obtaining of cold is all that to consume electric energy be cost.As semi-central air conditioning is provided cold (heat) water of regulation operating mode by cold (heat) water unit, it is pressurizeed with water pump, by pipeline distribution to the fan coil in each room, and in fan coil, carry out cold and hot exchange, thereby air is processed, thereby the effect that reaches cooling or heat up.In this process, cold-producing medium, water pump, blower fan etc. can consume a large amount of electric power, and economic cost is very high.
Summary of the invention
The utility model provides a kind of feasible, efficient cryogen cold energy use system, and object is can be by the cold energy of liquid oxygen, liquid nitrogen and liquefied natural gas waste originally for generating, freezing, refrigeration and air-conditioning refrigeration system.
A kind of cryogen cold energy use system that the utility model provides, is characterized in that, this system comprises First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger, second liquid booster pump, the 3rd liquid booster pump and expansion power generation machine;
The cryogen entrance of First Heat Exchanger is used for receiving cryogen, the cryogen outlet of First Heat Exchanger is connected with the cryogen entrance of the second heat exchanger, the cryogen outlet of the second heat exchanger is connected with the cryogen entrance of the 3rd heat exchanger, the cryogen outlet of the 3rd heat exchanger, for as user interface, forms thus cryogen cold and discharges flow process;
Second liquid booster pump connects for the circulation of low-temperature refrigerant, its outlet is connected with the entrance of the low-temperature refrigerant of the second heat exchanger, the outlet of the low-temperature refrigerant of the second heat exchanger is connected with the low-temperature refrigerant entrance of the 3rd heat exchanger, the low-temperature refrigerant outlet of the 3rd heat exchanger is connected with the entrance of expansion power generation machine, the outlet of expansion power generation machine is connected with the low-temperature refrigerant entrance of First Heat Exchanger, the low-temperature refrigerant outlet of First Heat Exchanger is connected with the entrance of expansion power generation machine, forms thus low-temperature refrigerant closed cycle;
The 3rd liquid booster pump connects for the circulation of warm cold-producing medium, its outlet is connected with the entrance of the middle temperature cold-producing medium of the 3rd heat exchanger, the outlet of the middle temperature cold-producing medium of the 3rd heat exchanger is connected with the entrance of the middle temperature cold-producing medium of the second heat exchanger, the outlet of the middle temperature cold-producing medium of the second heat exchanger is connected with the entrance of the 3rd liquid booster pump, warm cold-producing medium closed cycle in forming thus;
The 3rd heat exchanger is also provided with the entrance and exit of refrigerating medium.
The utility model has the advantage of: reclaimed the cold energy of the script waste of cryogen liquid oxygen, liquid nitrogen and liquefied natural gas, and used it for generating, freezing, refrigeration and air-conditioning refrigeration system, for it provides a large amount of colds, reduced the consumption of electric energy.The utility model system can make full use of the cold energy of cryogen, significantly improve energy conversion efficiency, reduce pollutant emission, the performance of improvement system, the economy of cryogen is greatly improved, adopt do not fire, quick-fried, not nontoxic working media, greatly improved the accurate security that can utilize of the danger medium such as liquid oxygen and liquefied natural gas.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the present utility model; Wherein, 1-First Heat Exchanger, 2-the second heat exchanger, 3-the 3rd heat exchanger, 4-first liquid booster pump, 5-second liquid booster pump, 6-the 3rd liquid booster pump, 7-expansion power generation machine.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described further.It should be noted that at this, be used for helping to understand the utility model for the explanation of these embodiments, but do not form restriction of the present utility model.In addition,, in each embodiment of described the utility model, involved technical characterictic just can combine mutually as long as do not form each other conflict.
Typically, middle temperature refers to higher than-60 ℃, and lower than 20 ℃, low temperature refers to lower than-60 ℃.
As shown in Figure 1, a kind of cryogen cold energy use system that the utility model provides, this system First Heat Exchanger 1, the second heat exchanger 2, the 3rd heat exchanger 3, first liquid booster pump 4, second liquid booster pump 5, the 3rd liquid booster pump 6 and expansion power generation machine 7, they are connected to form low-temperature refrigerant closed cycle, middle temperature cold-producing medium closed cycle and cryogen cold by pipeline and discharge flow process.
The outlet of first liquid booster pump 4 is connected with the cryogen entrance of First Heat Exchanger 1, and the cryogen outlet of First Heat Exchanger 1 is connected with the cryogen entrance of the second heat exchanger 2; The cryogen outlet of the second heat exchanger 2 is connected with the cryogen entrance of the 3rd heat exchanger 3; The cryogen outlet of the 3rd heat exchanger 3 is for being connected with user; Form thus cryogen cold and discharge flow process.
First cryogen enters carries out supercharging in first liquid booster pump 4, thereby entering the heat that absorbs low-temperature refrigerant in First Heat Exchanger 1, the cryogen after supercharging becomes gaseous state, enter again the heat of warm cold-producing medium in the second heat exchanger 2 absorptions, finally enter the heat that absorbs refrigerating medium in the 3rd heat exchanger 3, now cryogen becomes gaseous state completely, can be for user.
Second liquid booster pump 5 connects for the circulation of low-temperature refrigerant, its outlet is connected with the entrance of the low-temperature refrigerant of the second heat exchanger 2, the outlet of the low-temperature refrigerant of the second heat exchanger 2 is connected with the low-temperature refrigerant entrance of the 3rd heat exchanger 3, the low-temperature refrigerant outlet of the 3rd heat exchanger 3 is connected with the entrance of expansion power generation machine 7, the outlet of expansion power generation machine 7 is connected with the low-temperature refrigerant entrance of First Heat Exchanger 1, and the low-temperature refrigerant outlet of First Heat Exchanger 1 is connected with the entrance of expansion power generation machine 7; Form thus low-temperature refrigerant closed cycle.
Low-temperature refrigerant steam in First Heat Exchanger 1 with cryogen heat exchange, and be condensed into liquid, condensed fluid is pressurized through second liquid booster pump 5, then absorb heat through the second heat exchanger 2 and the 3rd heat exchanger 3, evaporate and reach superheat state, entering subsequently expansion power generation machine 7 acting generating, simultaneously low-temperature refrigerant cooling refrigerations, and get back to First Heat Exchanger 1, complete low-temperature refrigerant closed cycle.
Between First Heat Exchanger 1 and second liquid booster pump 5, can set up a reservoir, prevent not having the low-temperature refrigerant gas of all liquefaction to enter second liquid booster pump 5 in First Heat Exchanger 1.
The 3rd liquid booster pump 6 connects for the circulation of warm cold-producing medium, its outlet is connected with the entrance of the middle temperature cold-producing medium of the 3rd heat exchanger 3, the outlet of the middle temperature cold-producing medium of the 3rd heat exchanger 3 is connected with the entrance of the middle temperature cold-producing medium of the second heat exchanger 2, the outlet of the middle temperature cold-producing medium of the second heat exchanger 2 is connected with the entrance of the 3rd liquid booster pump 6, warm cold-producing medium closed cycle in forming thus.
Middle temperature refrigerant liquid is lowered the temperature by low-temperature refrigerant and cry-fluid in the second heat exchanger 2, enter subsequently in the 3rd liquid booster pump 6 and carry out supercharging, middle temperature cold-producing medium after supercharging enters the 3rd heat exchanger 3 and absorbs the heat of refrigerating medium, return in the second heat exchanger 2, complete middle temperature cold-producing medium closed cycle.
Equally, between the second heat exchanger 2 and the 3rd liquid booster pump 6, also can set up a reservoir, prevent not having the low-temperature refrigerant gas of all liquefaction to enter the 3rd liquid booster pump 6 in the second heat exchanger 2.
The low-temperature refrigerant of native system can adopt R14, R13 etc., middle temperature cold-producing medium can adopt R22, R744 etc., refrigerating medium adopts ethylene glycol solution or R744 etc., these media are the nontoxic safety fluid that do not burn, do not explode, and have avoided cryogen as liquid oxygen, danger that liquefied natural gas is flammable can quick-friedly bring;
The First Heat Exchanger 1 of native system can adopt condenser/evaporator, and low-temperature refrigerant is condensation therein, and cryogen is evaporated therein;
The First Heat Exchanger 1 of native system also adopts wound tube heat exchanger, and the second heat exchanger 2, the 3rd heat exchanger 3 adopt multiple flow plate-fin heat exchanger;
If native system cryogen has pressure before entering native system, can remove liquid booster pump 4.
Illustrate the course of work of the utility model system below:
First cryogen liquid nitrogen enters in heat exchanger 1, absorb the heat of low-temperature refrigerant R14, make R14 be condensed into liquid, then enter in heat exchanger 2, the heat of warm cold-producing medium R22 in absorption, makes the cooling of R22 liquid, enter again in heat exchanger 3 and the heat exchange of refrigerating medium ethylene glycol solution, give ethylene glycol solution by cold, obtain the ethylene glycol solution of cold for freezing, refrigeration or air conditioner refrigerating, the cold that completes cryogen liquid nitrogen discharges flow process;
In the circulation of low-temperature refrigerant R14, low-temperature refrigerant R14 steam enters heat exchanger 1, be liquid by cryogen cooled with liquid nitrogen, then enter supercharging in liquid booster pump 5, R14 liquid after boost in pressure enters in heat exchanger 2, the heat of warm cold-producing medium R22 in absorption, R14 liquid constantly gasifies, enter subsequently the heat that continues to absorb refrigerating medium in heat exchanger 3, reach superheat state, overheated R14 gas enters acting generating in expansion power generation machine 7, produces electric energy, R14 is decrease temperature and pressure, gets back in heat exchanger 1;
In the circulation of middle temperature cold-producing medium R22, middle temperature cold-producing medium R22 enters the cold that obtains cryogen liquid nitrogen and low-temperature refrigerant R14 in heat exchanger 2, self temperature is reduced, R14 liquid after cooling enters supercharging in liquid booster pump 6, then enter in heat exchanger 3 to refrigerating medium ethylene glycol solution released cold quantity, R22 self temperature height, enters in heat exchanger 1.
The above is preferred embodiment of the present utility model, but the utility model should not be confined to the disclosed content of this embodiment and accompanying drawing.Do not depart from the equivalence completing under spirit disclosed in the utility model so every or revise, all falling into the scope of the utility model protection.
Claims (7)
1. a cryogen cold energy use system, is characterized in that, this system comprises First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger, second liquid booster pump, the 3rd liquid booster pump and expansion power generation machine;
The cryogen entrance of First Heat Exchanger is used for receiving cryogen, the cryogen outlet of First Heat Exchanger is connected with the cryogen entrance of the second heat exchanger, the cryogen outlet of the second heat exchanger is connected with the cryogen entrance of the 3rd heat exchanger, the cryogen outlet of the 3rd heat exchanger, for as user interface, forms thus cryogen cold and discharges flow process;
Second liquid booster pump connects for the circulation of low-temperature refrigerant, its outlet is connected with the entrance of the low-temperature refrigerant of the second heat exchanger, the outlet of the low-temperature refrigerant of the second heat exchanger is connected with the low-temperature refrigerant entrance of the 3rd heat exchanger, the low-temperature refrigerant outlet of the 3rd heat exchanger is connected with the entrance of expansion power generation machine, the outlet of expansion power generation machine is connected with the low-temperature refrigerant entrance of First Heat Exchanger, the low-temperature refrigerant outlet of First Heat Exchanger is connected with the entrance of expansion power generation machine, forms thus low-temperature refrigerant closed cycle;
The 3rd liquid booster pump connects for the circulation of warm cold-producing medium, its outlet is connected with the entrance of the middle temperature cold-producing medium of the 3rd heat exchanger, the outlet of the middle temperature cold-producing medium of the 3rd heat exchanger is connected with the entrance of the middle temperature cold-producing medium of the second heat exchanger, the outlet of the middle temperature cold-producing medium of the second heat exchanger is connected with the entrance of the 3rd liquid booster pump, warm cold-producing medium closed cycle in forming thus;
The 3rd heat exchanger is also provided with the entrance and exit of refrigerating medium.
2. a kind of cryogen cold energy use system according to claim 1, is characterized in that, this system also comprises first liquid booster pump, and its outlet is connected with the cryogen entrance of First Heat Exchanger.
3. a kind of cryogen cold energy use system according to claim 1, it is characterized in that, between First Heat Exchanger and second liquid booster pump, set up a reservoir, prevent not having the low-temperature refrigerant gas of all liquefaction to enter second liquid booster pump in First Heat Exchanger.
4. a kind of cryogen cold energy use system according to claim 1, it is characterized in that, between the second heat exchanger and the 3rd liquid booster pump, set up a reservoir, prevent not having the low-temperature refrigerant gas of all liquefaction to enter the 3rd liquid booster pump in the second heat exchanger.
5. according to arbitrary described a kind of cryogen cold energy use system in claim 1 to 4, it is characterized in that, the low-temperature refrigerant that this system adopts is R14, R13, and middle temperature cold-producing medium is R22, R744, and refrigerating medium is ethylene glycol solution or R744.
6. according to arbitrary described a kind of cryogen cold energy use system in claim 1 to 4, it is characterized in that, First Heat Exchanger adopts condenser/evaporator, and low-temperature refrigerant is condensation therein, and cryogen is evaporated therein.
7. according to arbitrary described a kind of cryogen cold energy use system in claim 1 to 4, it is characterized in that, First Heat Exchanger adopts wound tube heat exchanger, and the second heat exchanger, the 3rd heat exchanger adopt multiple flow plate-fin heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320825074.XU CN203629121U (en) | 2013-12-14 | 2013-12-14 | Cryogenic fluid cold energy utilization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320825074.XU CN203629121U (en) | 2013-12-14 | 2013-12-14 | Cryogenic fluid cold energy utilization system |
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| CN203629121U true CN203629121U (en) | 2014-06-04 |
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| CN201320825074.XU Withdrawn - After Issue CN203629121U (en) | 2013-12-14 | 2013-12-14 | Cryogenic fluid cold energy utilization system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712366A (en) * | 2013-12-14 | 2014-04-09 | 华中科技大学 | System for utilizing cold energy of low-temperature fluid |
| CN106091358A (en) * | 2016-07-25 | 2016-11-09 | 东莞中子科学中心 | A kind of heater for cryogen and application thereof |
| CN114439562A (en) * | 2022-01-19 | 2022-05-06 | 杨兆铭 | LNG cold energy efficient mixed refrigerant power generation method |
-
2013
- 2013-12-14 CN CN201320825074.XU patent/CN203629121U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712366A (en) * | 2013-12-14 | 2014-04-09 | 华中科技大学 | System for utilizing cold energy of low-temperature fluid |
| CN103712366B (en) * | 2013-12-14 | 2015-10-28 | 华中科技大学 | A kind of cryogen cold energy use system |
| CN106091358A (en) * | 2016-07-25 | 2016-11-09 | 东莞中子科学中心 | A kind of heater for cryogen and application thereof |
| CN106091358B (en) * | 2016-07-25 | 2021-11-23 | 东莞中子科学中心 | Heater for low-temperature fluid and application thereof |
| CN114439562A (en) * | 2022-01-19 | 2022-05-06 | 杨兆铭 | LNG cold energy efficient mixed refrigerant power generation method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20151028 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |