CN204827566U - System for utilize electricity generation of high -pressure low temperature fluid and retrieve low -grade used heat gaseously with import of cooling compression machine - Google Patents
System for utilize electricity generation of high -pressure low temperature fluid and retrieve low -grade used heat gaseously with import of cooling compression machine Download PDFInfo
- Publication number
- CN204827566U CN204827566U CN201520345727.3U CN201520345727U CN204827566U CN 204827566 U CN204827566 U CN 204827566U CN 201520345727 U CN201520345727 U CN 201520345727U CN 204827566 U CN204827566 U CN 204827566U
- Authority
- CN
- China
- Prior art keywords
- fluid
- heat exchanger
- power generation
- cooling
- heat exchange
- Prior art date
- 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.)
- Expired - Fee Related
Links
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model relates to a system for utilize electricity generation of high -pressure low temperature fluid and retrieve low -grade used heat gaseously with import of cooling compression machine can effectively utilize the electricity generation of high -pressure low temperature fluid energy, retrieves low -grade used heat and the gaseous consumption that reduces the compressor that is further showing of cooling compression machine import simultaneously. The expander is connected with power generation facility, power generation facility is connected with the power output device, the cooling heat exchanger, enthalpy exchanger, pump set gradually in the cooling in the loop in advance, fluid heat transfer in the fluid of cooling in the heat exchanger and the cooling loop, fluid in the cooling loop and the fluid heat transfer among the enthalpy exchanger in advance for fluid heat transfer among the fluid of cooling in the heat exchanger and the enthalpy exchanger in advance, fluid in the cooling heat exchanger is heat transfer for the fluid among the enthalpy exchanger in advance, the expander of heat transfer mechanism's enthalpy exchanger in advance and inflation electricity generation mechanism is connected.
Description
Technical field
The utility model relates to a kind of system utilizing high pressure cryogenic fluid generating and reclaim low-grade exhaust heat and cooling compressor inlet gas.
Background technique
At iron and steel, a lot of high pressure cryogenic fluid sources (gas is had in Petroleum & Petrochemical Enterprises and industrial park, liquid), as the nitrogen etc. that air separation oxygenerator is discharged, these high-temperature low-pressure fluid source majorities do not utilize and are typically piped directly in environment now, cause very large energy loss, in these enterprises and industrial park, have a large amount of energy demand recovery of low-grade exhaust heat source (temperature <150 DEG C) and the intake requirement high efficiency cooling of gas compressor simultaneously.
Reclaim the thing that low-grade exhaust heat energy is part difficulty, normally use organic Rankine bottoming cycle (ORC, OrganicRankineCycle) low-grade exhaust heat energy is changed to electric energy or refrigeration, if the patent No. is 201420082166.8, name is called a kind of Chinese patent of non-constant used heat twin-stage organic Rankine cycle power generation system.But the initial outlay of organic Rankine bottoming cycle equipment very high (about 15000 yuan/kwh), present stage is difficult to apply.Such low-grade exhaust heat is directly discharged to environment and causes a large amount of energy dissipation also can cause serious thermo-pollution.
During gas compressor pressurized gas, as from air oxygen preparation, the power consumption of the every one-level of air compressor when pressure ratio is certain with import PTAT; As inlet temperature reduces by 10%, then energy consumption reduces by 10%.This be any pneumatic design improve, driven compressor system optimization be all difficult to realize.Conventional multistage industrial compressors level final vacuum temperature is generally about 90 DEG C, in order to the energy consumption reducing next stage generally adopts cascade EDFA system.Existing cooling system adopts the water with ambient temperature that upper level delivery temperature is reduced to ambient temperature, and then cooled gas enters into next stage, is further compressed.
In summary it can be seen also do not exist in prior art and reclaim the method and system that low-grade exhaust heat and cooling compressor inlet gas are reclaimed in the generating of high pressure cryogenic fluid energy simultaneously.
Model utility content
The purpose of this utility model is to overcome above shortcomings in prior art, and a kind of system utilizing high pressure cryogenic fluid generating and reclaim low-grade exhaust heat and cooling compressor inlet gas is provided, can effectively utilize high pressure cryogenic fluid energy to generate electricity, recovery low-grade exhaust heat and cooling compressor inlet gas significantly reduce the power consumption of compressor further simultaneously.
The technical scheme in the invention for solving the above technical problem is: a kind of system utilizing high pressure cryogenic fluid generating and reclaim low-grade exhaust heat and cooling compressor inlet gas, is characterized in that: comprise expansion power generation mechanism and heat exchange mechanisms;
Expansion power generation mechanism comprises decompressor, electricity generating device and electric power output apparatus; Decompressor is connected with electricity generating device; Electricity generating device is connected with electric power output apparatus; When expansion power generation mechanism is more than two-stage, these expansion power generation mechanisms connect successively according to before and after the flow direction of high pressure cryogenic fluid, and the fluid output of previous stage expansion power generation mechanism decompressor is communicated with the fluid input of rear stage expansion power generation mechanism decompressor;
Heat exchange mechanisms comprises cooling heat exchanger, preheating heat exchanger, pump and cooling loop; Cooling heat exchanger, preheating heat exchanger, pump are successively set in cooling loop; Fluid in cooling heat exchanger and the fluid heat transfer in cooling loop, fluid in cooling loop and the fluid heat transfer in preheating heat exchanger, make the fluid in cooling heat exchanger and the fluid heat transfer in preheating heat exchanger, the fluid in cooling heat exchanger passes to heat the fluid in preheating heat exchanger; When heat exchange mechanisms is more than two-stage, arrange before and after the flow direction of these heat exchange mechanisms according to high pressure low temperature gas;
The preheating heat exchanger of heat exchange mechanisms is connected with the decompressor of expansion power generation mechanism.
Expansion power generation mechanism described in the utility model is two-stage, is set to first order expansion power generation mechanism and second level expansion power generation mechanism according to succession; Described heat exchange mechanisms is two-stage, is set to first order heat exchange mechanisms and second level heat exchange mechanisms according to succession.
The fluid output of the cooling heat exchanger of the utility model first order heat exchange mechanisms is communicated with the fluid input of the cooling heat exchanger of second level heat exchange mechanisms; The fluid output of the preheating heat exchanger of first order heat exchange mechanisms is communicated with the fluid input of the decompressor of first order expansion power generation mechanism; The fluid input of the preheating heat exchanger of second level heat exchange mechanisms is communicated with the fluid output of the decompressor of first order expansion power generation mechanism, and the fluid output of the preheating heat exchanger of second level heat exchange mechanisms is communicated with the fluid input of the decompressor of second level expansion power generation mechanism.
The fluid inlet of the preheating heat exchanger of the utility model first order heat exchange mechanisms is communicated with the fluid output of the decompressor of first order expansion power generation mechanism, and the fluid output of the preheating heat exchanger of first order heat exchange mechanisms is communicated with the fluid inlet of the decompressor of second level expansion power generation mechanism; The fluid input of the preheating heat exchanger of second level heat exchange mechanisms is communicated with the fluid output of the decompressor of second level expansion power generation mechanism; The fluid inlet of the cooling heat exchanger of first order heat exchange mechanisms is communicated with the fluid output of the cooling heat exchanger of second level heat exchange mechanisms.
The fluid output of the preheating heat exchanger of the utility model first order heat exchange mechanisms is communicated with the fluid input of the decompressor of first order expansion power generation mechanism; The fluid input of the preheating heat exchanger of second level heat exchange mechanisms is communicated with the fluid output of the decompressor of second level expansion power generation mechanism.
Utilize high pressure cryogenic fluid to generate electricity and reclaim a method for low-grade exhaust heat and cooling compressor inlet gas, comprising expansion power generation process, reclaim low-grade exhaust heat process and cooling compressor inlet gas process; A, expansion power generation process are: high pressure cryogenic fluid is sent into decompressor, and after decompressor acting, can be converted to rotating mechanical energy in fluid, then electricity generating device utilizes this rotating mechanical energy to generate electricity, then exports through electric power output apparatus;
B, recovery low-grade exhaust heat process are: low-grade exhaust heat is sent into cooling heat exchanger, low-grade exhaust heat in cooling heat exchanger and the high pressure low temperature gas converting heat in preheating heat exchanger, the low-grade exhaust heat in cooling heat exchanger passes to heat the high pressure cryogenic fluid in preheating heat exchanger; This high pressure cryogenic fluid is the high pressure cryogenic fluid in expansion power generation process;
C, cooling compressor inlet fluid process are: compressor inlet fluid is sent into cooling heat exchanger, compressor inlet fluid in cooling heat exchanger and the high pressure low temperature gas converting heat in preheating heat exchanger, the compressor inlet fluid in cooling heat exchanger passes to heat the high pressure cryogenic fluid in preheating heat exchanger; This high pressure cryogenic fluid is the high pressure cryogenic fluid in expansion power generation process;
Wherein, reclaim low-grade exhaust heat process and/or cooling compressor inlet gas process and expansion power generation process to carry out simultaneously.
When the utility model recovery low-grade exhaust heat process and expansion power generation process are carried out simultaneously, low-grade exhaust heat enters cooling heat exchanger and participates in heat exchange, and high pressure cryogenic fluid enters preheating heat exchanger and participates in heat exchange; High pressure cryogenic fluid is sent into decompressor after being preheated heat exchanger heating and is generated electricity.
When the utility model cooling compressor inlet gas process and expansion power generation process are carried out simultaneously, compressor inlet gas enters cooling heat exchanger and participates in heat exchange, and high pressure cryogenic fluid enters preheating heat exchanger and participates in heat exchange; High pressure cryogenic fluid is sent into decompressor after being preheated heat exchanger heating and is carried out generating electricity or become low normal pressure and temperature fluid drainage and go out.
The utility model reclaims low-grade exhaust heat process and cooling compressor inlet gas process and expansion power generation process when carrying out simultaneously, low-grade exhaust heat enters one-level cooling heat exchanger, high pressure cryogenic fluid enters one-level preheating heat exchanger, this grade of cooling heat exchanger and this grade of preheating heat exchanger carry out heat exchange, and high pressure cryogenic fluid is sent into decompressor after being preheated heat exchanger heating and generated electricity; Compressor inlet gas enters another grade of cooling heat exchanger, high pressure cryogenic fluid after generating enters another grade of preheating heat exchanger, this grade of cooling heat exchanger and this grade of preheating heat exchanger carry out heat exchange, and high pressure cryogenic fluid is sent into decompressor and carried out generating electricity or become low normal pressure and temperature fluid drainage and go out after being preheated heat exchanger heating.
The utility model compared with prior art, have the following advantages and effect: the fluid energy that simply efficient can reclaim high pressure low temperature, the low-grade waste heat energy regenerating of recovery of efficiency simultaneously, and compressor inlet gas temperature is reduced to the temperature lower than environment, and then significantly reduce the power consumption of compressor, can effectively implement the utility model to iron and steel according to actual conditions, in petroleum and petrochemical industry and industrial park, significant effects of energy saving and emission reduction can be brought.
Accompanying drawing explanation
Fig. 1 is the structural representation of the working procedure of the utility model embodiment 1.
Fig. 2 is the structural representation of the working procedure of the utility model embodiment 2.
Fig. 3 is the structural representation of the working procedure of the utility model embodiment 3.
Embodiment
Below in conjunction with accompanying drawing, also by embodiment, the utility model is described in further detail, and following examples are that the utility model is not limited to following examples to explanation of the present utility model.
See Fig. 1 ~ Fig. 3, the utility model embodiment comprises expansion power generation mechanism and heat exchange mechanisms.
Expansion power generation mechanism comprises decompressor 3, electricity generating device and electric power output apparatus 4.
Decompressor 3 is connected with electricity generating device; Electricity generating device is connected with electric power output apparatus 4; Constitute one-stage expansion power facility.
When expansion power generation mechanism is more than two-stage, these expansion power generation mechanisms connect successively according to before and after the flow direction of high pressure cryogenic fluid, the fluid output of previous stage expansion power generation mechanism decompressor 3 is communicated with the fluid input of rear stage expansion power generation mechanism decompressor 3, forms the above expansion power generation mechanism of two-stage; These expansion power generation mechanisms are defined as first order expansion power generation mechanism, second level expansion power generation mechanism successively according to succession ... n-th grade of expansion power generation mechanism.In the present embodiment, expansion power generation mechanism is two-stage, forms double expansion power facility.
The expansion power generation mechanism of more than one-level or two-stage can be designed according to the energy figure of high pressure cryogenic fluid.
The expansion power generation process of above double expansion power facility is:
(1), high pressure cryogenic fluid is introduced into first order expansion power generation mechanism, after decompressor 3 expansion work of first order expansion power generation mechanism, rotating mechanical energy can be converted in fluid, then the electricity generating device of this grade of expansion power generation mechanism utilizes this rotating mechanical energy to generate electricity, then exports through the electric power output apparatus 4 of this grade of expansion power generation mechanism;
(2), after the fluid temperature (F.T.) and pressure drop of the expansion of first order expansion power generation mechanism, second level expansion power generation mechanism is entered into, fluid is after decompressor 3 expansion work of this second level expansion power generation mechanism, rotating mechanical energy can be arrived in fluid, then the electricity generating device of this grade of expansion power generation mechanism utilizes this rotating mechanical energy to generate electricity, then exports through the electric power output apparatus 4 of this grade of expansion power generation mechanism;
(3) if, second level expansion power generation mechanism fluid out decrease temperature and pressure be just directly discharged into environment to close to external pressure; If also arrange one-stage expansion power facility again higher than external pressure.
Heat exchange mechanisms comprises cooling heat exchanger 1, preheating heat exchanger 2, pump 5 and cooling loop 6.Cooling heat exchanger 1, preheating heat exchanger 2, pump 5 are successively set in cooling loop 6, have the fluid for heat exchange in cooling loop 6.Fluid heat transfer in fluid in cooling heat exchanger 1 and cooling loop 6, fluid heat transfer in fluid in cooling loop 6 and preheating heat exchanger 2, finally realize the fluid in cooling heat exchanger 1 and the fluid heat transfer in preheating heat exchanger 2, the fluid in cooling heat exchanger 1 passes to the fluid in preheating heat exchanger 2 heat; Pump 5 urges the circular fluidic flow in cooling loop 6.
When heat exchange mechanisms is more than two-stage, these heat exchange mechanisms are arranged according to before and after the flow direction of high pressure cryogenic fluid, form the above heat exchange mechanisms of two-stage; These heat exchange mechanisms are defined as first order heat exchange mechanisms, second level heat exchange mechanisms successively according to succession ... n-th grade of expansion power generation mechanism.In the present embodiment, expansion power generation mechanism is two-stage, forms double expansion power facility.
The preheating heat exchanger 2 of heat exchange mechanisms is connected with the decompressor 3 of expansion power generation mechanism; The fluid output of preheating heat exchanger 2 is communicated with the fluid input of decompressor 3, and/or the fluid input of preheating heat exchanger 2 is communicated with the fluid output of decompressor 3.
Embodiment 1:
The present embodiment reclaims low-grade exhaust heat process and expansion power generation process is carried out simultaneously, reclaims while high pressure cryogenic fluid energy carries out generating electricity and reclaims low-quality waste heat energy regenerating.
As shown in Figure 1, in the present embodiment, expansion power generation mechanism is a two-stage type, forms double expansion power facility.Heat exchange mechanisms is also two-stage, forms two-stage heat exchange mechanisms.
The fluid output of the cooling heat exchanger 1 of first order heat exchange mechanisms is communicated with the fluid input of the cooling heat exchanger 1 of second level heat exchange mechanisms.The fluid output of the preheating heat exchanger 2 of first order heat exchange mechanisms is communicated with the fluid input of the decompressor 3 of first order expansion power generation mechanism; The fluid input of the preheating heat exchanger 2 of second level heat exchange mechanisms is communicated with the fluid output of the decompressor 3 of first order expansion power generation mechanism, and the fluid output of the preheating heat exchanger 2 of second level heat exchange mechanisms is communicated with the fluid input of the decompressor 3 of second level expansion power generation mechanism.
There is now high pressure low temperature gas (nitrogen) source, flow Q:500 cube m/h, T1=25 DEG C, P1=1.3MPa; Low-grade exhaust heat, Tf=150 DEG C, conveniently explains and calculates, and supposes T13=T14=T15=Tf.
(1) cooling heat exchanger 1 entering second level heat exchange mechanisms after the cooling heat exchanger 1 that, low-grade exhaust heat is introduced into first order heat exchange mechanisms participates in heat exchange again participates in heat exchange;
(2), state 1(T1, P1) high pressure low temperature gas is introduced into the preheating heat exchanger 2 of first order heat exchange mechanisms; This preheating heat exchanger 2 heated nitrogen is from state 1(T1, P1) to state 2(T2, P2), assuming that T2=100 DEG C, P2=1.3MPa;
(3), then high pressure low temperature nitrogen enter the decompressor 3 of first order expansion power generation mechanism, expand into state 3, T3=30 DEG C through decompressor 3, P3=0.4MPa, simultaneously generate electricity 135kw/h(suppose this grade of generating efficiency 0.65);
(4), the nitrogen of state 3 enters the preheating heat exchanger 2 of second level heat exchange mechanisms, and this preheating heat exchanger 2 heated nitrogen is from state 3(T3, P3) to state 5(T5, P5), T5=100 DEG C, P5=0.35MPa;
(5), then enter the decompressor 3 of second level expansion power generation mechanism, expand into state 6(T6, P6 through decompressor 3), T6=19 DEG C, P6=0.11MPa, the 157kw/h(that simultaneously generates electricity supposes this grade of generating efficiency 0.65).
It can thus be appreciated that total generated output is 292kw/h, wherein absorbing low-quality waste heat energy regenerating power generation part is 109kw/h.
Embodiment 2:
The present embodiment cooling compressor inlet gas process and expansion power generation process are carried out simultaneously, reclaim cooling-air compressor air inlet while high pressure cryogenic fluid energy carries out generating electricity, reduce air compressor power consumption.
As shown in Figure 2, in the present embodiment, expansion power generation mechanism is a two-stage type, forms double expansion power facility.Heat exchange mechanisms is also two-stage, forms two-stage heat exchange mechanisms.Gas compressor is two-stage, arranges before and after two-stage gas compressor, forms a two-stage gas compressor, and the first order of a two-stage type gas compressor, the second level are defined as first order gas compressor and second level gas compressor successively according to succession.
The fluid inlet of the preheating heat exchanger 2 of first order heat exchange mechanisms is communicated with the fluid output of the decompressor 3 of first order expansion power generation mechanism, and the fluid output of the preheating heat exchanger 2 of first order heat exchange mechanisms is communicated with the fluid inlet of the decompressor 3 of second level expansion power generation mechanism; The fluid input of the preheating heat exchanger 2 of second level heat exchange mechanisms is communicated with the fluid output of the decompressor 3 of second level expansion power generation mechanism.The fluid inlet of the cooling heat exchanger 1 of first order heat exchange mechanisms is communicated with the fluid output of the cooling heat exchanger 1 of second level heat exchange mechanisms, and the fluid output of the cooling heat exchanger 1 of first order heat exchange mechanisms is communicated with the fluid inlet of second level gas compressor.The fluid inlet of the cooling heat exchanger 1 of second level heat exchange mechanisms is communicated with the fluid output of first order gas compressor.
There is now high pressure low temperature gas (nitrogen) source, flow Q, 500 cubes ms/h, T-1=25 DEG C, P-1=1.30MPa; This source of the gas is other a two-stage air compressor (compression 11000 standard state air per hour), assuming that ambient condition 0, T0=25 DEG C, and P0=0.10MPa.
(1), the first order gas compressor exit gas cooling heat exchanger 1 that is introduced into the second level heat exchange mechanisms cooling heat exchanger 1 that enters first order heat exchange mechanisms after participating in heat exchange again participates in heat exchange, finally enters second level gas compressor as inlet gas;
(2), high pressure low temperature gas (T-1=25 DEG C, P-1=1.30MPa) decompressor 3 of first order expansion power generation mechanism is entered, do work through this decompressor 3, gas internal energy is converted to rotating mechanical energy, then the electricity generating device of this grade of expansion power generation mechanism utilizes this rotating mechanical energy to generate electricity E1=107kw/h, drops to T-2=-31 DEG C, P-2=0.40MPa through the nitrogen temperature of overexpansion and pressure;
(3) preheating heat exchanger 2 that, then nitrogen enters first order heat exchange mechanisms goes cooling first order gas compressor exit gas to make it from state 7(T-7, P-7) change to state 8(T-8=10 DEG C, P-8=0.40MPa);
(4), state 3(T-3, P-3) expansion nitrogen enters the decompressor 3 of second level expansion power generation mechanism again, do work through this decompressor 3, gas internal energy is converted to rotating mechanical energy, then the electricity generating device of this grade of expansion power generation mechanism utilizes this rotating mechanical energy to generate electricity out electric power E2=136kw/h, gas through overexpansion changes to state 4(T-4=-20 DEG C, P-4=0.40MPa);
(5) preheating heat exchanger 2 that, then nitrogen enters second level heat exchange mechanisms goes cooling first order gas compressor exit gas to make it from state 6(T-6=80 DEG C, P-6=0.40MPa) change to state 7(T-7, P-7); Expansion nitrogen is from state 4(T-4=-20 DEG C, P-4=0.11MPa simultaneously) change to state 5(T-5=10 DEG C, P-5=0.10MPa);
(6), state 8(T-8=10 DEG C, P-8=0.40MPa) entered second level gas compressor by pressurized gas as inlet gas and be compressed to state 9(T-9=90 DEG C, P-9=1.20MPa).
The generating of high pressure low temperature gas energy is reclaimed for 243kw/h by double expansion power facility, make the outlet temperature of first order gas compressor be that the pressurized air of T-6=80 DEG C is cooled to T-8=10 DEG C through two-stage simultaneously, decrease this grade of compression power consumption 108kw/h, decrease 20% with the compression power consumption ratio not carrying out this grade of inlet gas cooling compressor, power savings is remarkable.
Embodiment 3:
The present embodiment reclaims low-grade exhaust heat process and cooling compressor inlet gas process and expansion power generation process to carry out simultaneously, reclaim while high pressure cryogenic fluid carries out generating electricity and reclaim low-quality waste heat energy regenerating, cooled gas compressor air inlet simultaneously, reduces gas compressor power consumption.
As shown in Figure 3, in the present embodiment, expansion power generation mechanism is two-stage, forms double expansion power facility.Heat exchange mechanisms is also two-stage, forms two-stage heat exchange mechanisms.Gas compressor is two two-stage types, arranges before and after two-stage gas compressor, forms two-stage gas compressor, first, second level of a two-stage gas compressor is defined as first order gas compressor and second level gas compressor successively according to succession.
The fluid output of the preheating heat exchanger 2 of first order heat exchange mechanisms is communicated with the fluid input of the decompressor 3 of first order expansion power generation mechanism.The fluid input of the preheating heat exchanger 2 of second level heat exchange mechanisms is communicated with the fluid output of the decompressor 3 of second level expansion power generation mechanism; The fluid inlet of the cooling heat exchanger 1 of second level heat exchange mechanisms is communicated with the fluid output of first order gas compressor, and the fluid output of this cooling heat exchanger 1 is communicated with the gas inlet of second level gas compressor.
(1) cooling heat exchanger 1 that, low-grade exhaust heat enters first order heat exchange mechanisms participates in heat exchange; The cooling heat exchanger 1 that first order gas compressor exit gas enters second level heat exchange mechanisms participates in heat exchange, then enters second level gas compressor as inlet gas;
(2), state 1(T-1=25 DEG C, P-1=1.3MPa) high pressure low temperature nitrogen is with flow Q1=15t/h(4.1kg/s) flow out, be introduced into the preheating heat exchanger 2 of first order heat exchange mechanisms, reclaim low-quality thermal energy state and change to state 2(T-2=100 DEG C, P-2=0.1MPa);
(3), high pressure low temperature nitrogen enters the decompressor 3 of first order expansion power generation mechanism and the decompressor 3 of second level expansion power generation mechanism subsequently successively, decompressor 3 through double expansion power facility does work, gas internal energy is converted to rotating mechanical energy, after the electricity generating device of double expansion power facility utilizes this rotating mechanical energy to generate electricity to produce E1=181kw/h and E2=414kw/h, nitrogen state changes to state 3(T-3=-41.0 DEG C, P-3=0.15MPa);
(4) exit gas that the preheating heat exchanger 2 that, the nitrogen of state 3 enters second level heat exchange mechanisms goes cooling first order gas compressor to produce, make it from state 5(rated flow 11000m3/h standard state, T-5=80 DEG C, P-5=0.4MPa) state 6(T-6=10 DEG C is changed to, P-6=0.4MPa);
(5), the exit gas of state 6 enters second level gas compressor as inlet gas, then is compressed to state 7 (T-7=90 DEG C, P-7=1.2MPa) through second level gas compressor.
Air temperature after the compression of first order gas compressor reaches 80 DEG C, is cooled to the high-pressure air that temperature is 10 DEG C, and such gas can make to reduce power consumption Wc=288kw when second level gas compression.High pressure low temperature give up nitrogen expansion generating the low-quality used heat Hw=309kw of simultaneously stability and cool the inlet gas of second level gas compressor, reduce gas temperature 70 DEG C, decrease high stage compressor power consumption Wc=288kw.The system worked under these conditions income per hour is: generating E=595kw; Reclaim low-quality used heat Hw=309kw; Reduce gas compressor compression power consumption Wc=288kw, if work 4000 hours year, it is 0.555kg/kwh that the CO2 of standard coal fired power generation discharges original unit, electricity price is 0.70 yuan/kwh, this system only generates electricity annual increase income 166.6 ten thousand yuan, and year reduce CO2 and discharge 1321 tons, effects of energy saving and emission reduction is remarkable.
Each component names of the present utility model, structure, working principle are the common practise of those skilled in the art.
In addition, it should be noted that, the specific embodiment described in this specification, the shape, institute's title of being named etc. of its parts and components can be different, and the above content described in this specification is only to the explanation of the utility model structure example.
Claims (5)
1. utilize high pressure cryogenic fluid to generate electricity and reclaim a system for low-grade exhaust heat and cooling compressor inlet gas, it is characterized in that: comprise expansion power generation mechanism and heat exchange mechanisms;
Expansion power generation mechanism comprises decompressor, electricity generating device and electric power output apparatus; Decompressor is connected with electricity generating device; Electricity generating device is connected with electric power output apparatus; When expansion power generation mechanism is more than two-stage, these expansion power generation mechanisms connect successively according to before and after the flow direction of high pressure cryogenic fluid, and the fluid output of previous stage expansion power generation mechanism decompressor is communicated with the fluid input of rear stage expansion power generation mechanism decompressor;
Heat exchange mechanisms comprises cooling heat exchanger, preheating heat exchanger, pump and cooling loop; Cooling heat exchanger, preheating heat exchanger, pump are successively set in cooling loop; Fluid in cooling heat exchanger and the fluid heat transfer in cooling loop, fluid in cooling loop and the fluid heat transfer in preheating heat exchanger, make the fluid in cooling heat exchanger and the fluid heat transfer in preheating heat exchanger, the fluid in cooling heat exchanger passes to heat the fluid in preheating heat exchanger; When heat exchange mechanisms is more than two-stage, these heat exchange mechanisms are arranged according to before and after the flow direction of high pressure cryogenic fluid;
The preheating heat exchanger of heat exchange mechanisms is connected with the decompressor of expansion power generation mechanism.
2. system according to claim 1, is characterized in that: described expansion power generation mechanism is two-stage, is set to first order expansion power generation mechanism and second level expansion power generation mechanism according to succession; Described heat exchange mechanisms is two-stage, is set to first order heat exchange mechanisms and second level heat exchange mechanisms according to succession.
3. system according to claim 2, is characterized in that: the fluid output of the cooling heat exchanger of first order heat exchange mechanisms is communicated with the fluid input of the cooling heat exchanger of second level heat exchange mechanisms; The fluid output of the preheating heat exchanger of first order heat exchange mechanisms is communicated with the fluid input of the decompressor of first order expansion power generation mechanism; The fluid input of the preheating heat exchanger of second level heat exchange mechanisms is communicated with the fluid output of the decompressor of first order expansion power generation mechanism, and the fluid output of the preheating heat exchanger of second level heat exchange mechanisms is communicated with the fluid input of the decompressor of second level expansion power generation mechanism.
4. system according to claim 2, it is characterized in that: the fluid inlet of the preheating heat exchanger of first order heat exchange mechanisms is communicated with the fluid output of the decompressor of first order expansion power generation mechanism, the fluid output of the preheating heat exchanger of first order heat exchange mechanisms is communicated with the fluid inlet of the decompressor of second level expansion power generation mechanism; The fluid input of the preheating heat exchanger of second level heat exchange mechanisms is communicated with the fluid output of the decompressor of second level expansion power generation mechanism; The fluid inlet of the cooling heat exchanger of first order heat exchange mechanisms is communicated with the fluid output of the cooling heat exchanger of second level heat exchange mechanisms.
5. system according to claim 2, is characterized in that: the fluid output of the preheating heat exchanger of first order heat exchange mechanisms is communicated with the fluid input of the decompressor of first order expansion power generation mechanism; The fluid input of the preheating heat exchanger of second level heat exchange mechanisms is communicated with the fluid output of the decompressor of second level expansion power generation mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520345727.3U CN204827566U (en) | 2015-05-26 | 2015-05-26 | System for utilize electricity generation of high -pressure low temperature fluid and retrieve low -grade used heat gaseously with import of cooling compression machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520345727.3U CN204827566U (en) | 2015-05-26 | 2015-05-26 | System for utilize electricity generation of high -pressure low temperature fluid and retrieve low -grade used heat gaseously with import of cooling compression machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204827566U true CN204827566U (en) | 2015-12-02 |
Family
ID=54685175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520345727.3U Expired - Fee Related CN204827566U (en) | 2015-05-26 | 2015-05-26 | System for utilize electricity generation of high -pressure low temperature fluid and retrieve low -grade used heat gaseously with import of cooling compression machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204827566U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879178A (en) * | 2015-05-26 | 2015-09-02 | 阮炯明 | Method and system for generating power through high-pressure cryogenic fluid, recycling low-grade waste heat and cooling compressor inlet gas |
-
2015
- 2015-05-26 CN CN201520345727.3U patent/CN204827566U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879178A (en) * | 2015-05-26 | 2015-09-02 | 阮炯明 | Method and system for generating power through high-pressure cryogenic fluid, recycling low-grade waste heat and cooling compressor inlet gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108368750B (en) | Using an Embedded CO2System and method for cyclic power generation | |
| CN109736909B (en) | Compressed air energy storage system with multi-energy co-supply | |
| KR101705657B1 (en) | Electricity Generation Device and Method | |
| CN100497902C (en) | Energy reclaiming method and device for coal combination circulation generating system | |
| CN111396159B (en) | Liquefied natural gas cold energy cascade recycling system | |
| CN106837438A (en) | A kind of pressure energy of natural gas and cold energy combined recovery system of automobile and method | |
| CN213807777U (en) | Coupling system of thermal power generation system and compressed air energy storage system | |
| CN103256081B (en) | Energy comprehensive utilization method based on supercritical air | |
| CN111396291B (en) | Compressed gas waste heat recovery power generation system | |
| CN113864017A (en) | Kalina/organic Rankine combined cycle power generation system utilizing LNG cold energy and geothermal energy | |
| CN104879178A (en) | Method and system for generating power through high-pressure cryogenic fluid, recycling low-grade waste heat and cooling compressor inlet gas | |
| CN204827566U (en) | System for utilize electricity generation of high -pressure low temperature fluid and retrieve low -grade used heat gaseously with import of cooling compression machine | |
| CN113090506A (en) | Combined cooling, heating and power system and method using compressed air as energy source | |
| CN209990560U (en) | Cold energy cascade utilization system based on thermoacoustic technology | |
| CN110259537B (en) | Carbon dioxide Rankine cycle power system and operation method thereof | |
| CN109595461B (en) | LNG regasification and liquid air preparation system and working method | |
| CN103266952B (en) | Based on the energy comprehensive utilization system of supercritical air | |
| CN203239401U (en) | Energy comprehensive utilization system based on supercritical air | |
| CN202928199U (en) | A system capable of providing cold and heat stepwise by employing natural gas pressure energy | |
| CN106930834B (en) | A kind of energy-saving distributing-supplying-energy system based on liquefied natural gas | |
| CN215676067U (en) | Liquid air production device utilizing LNG cold energy | |
| CN214741487U (en) | Natural gas turbine decompression power generation system | |
| CN115539156A (en) | Natural gas station comprehensive energy system integrating constant-pressure compressed air energy storage | |
| CN203731092U (en) | Device for pressurizing raw natural gas by using natural gas pipeline network pressure energy | |
| CN110671164B (en) | Turbine-driven gas compression system and working method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 Termination date: 20180526 |