CN111396161A - L NG cold energy recycle device for vaporizing station - Google Patents
L NG cold energy recycle device for vaporizing station Download PDFInfo
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- CN111396161A CN111396161A CN202010307477.XA CN202010307477A CN111396161A CN 111396161 A CN111396161 A CN 111396161A CN 202010307477 A CN202010307477 A CN 202010307477A CN 111396161 A CN111396161 A CN 111396161A
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- intermediate medium
- natural gas
- cold energy
- evaporator
- recycling device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K19/00—Regenerating or otherwise treating steam exhausted from steam engine plant
- F01K19/10—Cooling exhaust steam other than by condenser; Rendering exhaust steam invisible
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/02—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass involving the use of working media other than water
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to the technical field of energy utilization, in particular to a cold energy recycling device for a L NG gasification station, which comprises a L NG evaporator and an intermediate medium evaporator, wherein a L NG evaporator circulates natural gas to the intermediate medium evaporator through a circulating pump, the intermediate medium evaporator attaches cold energy in the natural gas to the intermediate medium through the intermediate medium, the intermediate medium processes the natural gas into high-pressure normal-temperature gas through a heat exchanger, and then the high-pressure normal-temperature gas is transmitted to an intermediate medium turbine to be expanded to drive an engine to generate electricity.
Description
Technical Field
The invention relates to the technical field of energy utilization, in particular to a cold energy recycling device for an L NG gasification station.
Background
Since 1980, L NG outlet quantity almost increases at 8% per year, 2000, L NG trade quantity worldwide is 105.5 ten thousand tons, which increases 11.2% more than the last year, it is counted that L NG trade quantity worldwide has exceeded 1.4 hundred million tons and continues to increase, worldwide natural gas consumption increases 5000 billion cubic meters per 10 years on average, the specific gravity of natural gas consumption in world energy consumption structure has reached 35%, the liquefied natural gas (L NG) becomes the second largest energy next to oil, storage temperature 110K after natural gas-liquid processing, pressure is about 630.1 Mpa, its main component is methane, L NG is an efficient natural gas storage and transportation mode because its volume is only 1/600 when in gas state, L NG needs to be regasified to-20 to 40 degrees before supplying to natural gas pipe network, its storage temperature is about 870KJ/kg, its storage temperature is very low, L NG is a natural gas storage and transportation mode, L NG it has a regulating valve for storing cold energy, a special cold energy storage tank with refrigeration cycle, No. wo-20 to-40 degrees before supplying to natural gas pipe network, No. wo-K refrigeration system, no-wo-K refrigeration cycle refrigeration system, no-wo-cd-wo-cd refrigeration system, no-wo-cd, no-wo-cd, no-wo-cd, no.
Go up the patent document, satisfied the ice-making demand when with the cold volume of air trough time period not enough, solve the too big problem that makes the secondary refrigerant solidify easily of air peak time period cold volume, but to how to provide a cold energy recycle rate high, moreover, the steam generator is simple in structure, utilize L NG low temperature cold energy's characteristic, thereby liquefy working medium (intermediate medium), vaporize working medium again afterwards, thereby make it do the expansion function in the steam turbine, and then produce kinetic energy and change L NG gasification station that electricity was become through the generator and use cold energy recycle device and lack technical solution.
Disclosure of Invention
Aiming at the defects of the prior art, the invention discloses a cold energy recycling device for an L NG gasification station, which is used for solving the problems that how to provide a cold energy recycling device for a L NG gasification station, which has high cold energy recycling rate and simple structure, liquefies a working medium (intermediate medium) by applying the characteristic of L NG low-temperature cold energy, and then vaporizes the working medium, so that the working medium can perform expansion function in a steam turbine to generate kinetic energy and is converted into electricity through a generator.
The invention is realized by the following technical scheme:
the invention discloses a cold energy recycling device for an L NG gasification station, which is characterized by comprising a L NG evaporator and an intermediate medium evaporator, wherein the L NG evaporator circulates natural gas to the intermediate medium evaporator through a circulating pump, the intermediate medium evaporator attaches cold energy in the natural gas to the intermediate medium through the intermediate medium, and the intermediate medium processes the natural gas into high-pressure normal-temperature gas through a heat exchanger and then transmits the high-pressure normal-temperature gas to an intermediate medium turbine to expand to drive an engine to generate power.
Further, the L NG vaporizer was connected to the raw natural gas via L NG pumps and separated the natural gas from the seawater via the L NG vaporizer.
Furthermore, the intermediate medium turbine transmits the natural gas after cold energy extraction back to an L NG evaporator, and the natural gas is used as normal use.
Furthermore, the intermediate medium turbine converts the energy of the intermediate medium into kinetic energy when the energy flows through the spray pipe, and the fluid impacts the blades to push the impellers to rotate when the energy flows through the impellers, so that the turbine shaft is driven to rotate to drive the generator to generate power.
Furthermore, the intermediate medium is one of water, freon, carbon dioxide, methanol or ethylene glycol, and the intermediate medium enters the intermediate medium turbine to expand and do work to drive the generator to work and output electric energy outwards.
Furthermore, the L NG evaporator is composed of a heating chamber and an evaporation chamber, wherein the heating chamber provides heat required by evaporation for the liquid to promote boiling and vaporization of the liquid, and the evaporation chamber completely separates gas phase from liquid phase.
The invention has the beneficial effects that:
the invention has simple structure, utilizes the characteristic of L NG low-temperature cold energy to liquefy the working medium (intermediate medium), and then vaporizes the working medium, so that the working medium performs expansion work in a steam turbine to generate kinetic energy and converts the kinetic energy into electric energy through a generator, optimizes the utilization of energy, saves resources and has strong market application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment discloses a cold energy recycling device for an L NG gasification station, which is shown in fig. 1, and is characterized in that the device comprises a L NG evaporator and an intermediate medium evaporator, the L NG evaporator circulates natural gas to the intermediate medium evaporator through a circulating pump, the intermediate medium evaporator attaches cold energy in the natural gas to the intermediate medium through the intermediate medium, and the intermediate medium processes the natural gas into high-pressure normal-temperature gas through a heat exchanger and then transmits the high-pressure normal-temperature gas to an intermediate medium turbine to expand to drive an engine to generate power.
The L NG vaporizer was connected to the raw natural gas via L NG pumps and separated the natural gas from the seawater via a L NG vaporizer.
The intermediate medium turbine transmits the natural gas after cold energy extraction back to an L NG evaporator, and the natural gas is used as normal use.
The intermediate medium turbine converts energy of the intermediate medium into kinetic energy when the energy passes through the spray pipe in the flow, and the fluid impacts the blades to push the impellers to rotate when the energy passes through the impellers, so that the turbine shaft is driven to rotate to drive the generator to generate electricity.
The intermediate medium is one of water, Freon, carbon dioxide, methanol or ethylene glycol, and the intermediate medium enters the intermediate medium to perform turbine expansion work to drive the generator to work and output electric energy outwards.
The L NG evaporator is composed of a heating chamber and an evaporation chamber, wherein the heating chamber provides heat required by evaporation for liquid to promote boiling and vaporization of the liquid, and the evaporation chamber enables gas and liquid phases to be completely separated.
The invention has simple structure, utilizes the characteristic of L NG low-temperature cold energy to liquefy the working medium (intermediate medium), and then vaporizes the working medium, so that the working medium performs expansion work in a steam turbine to generate kinetic energy and converts the kinetic energy into electric energy through a generator, optimizes the utilization of energy, saves resources and has strong market application prospect.
Example 2
The present embodiment reuses the device of embodiment 1, and applies the cold energy of L NG stage by stage, shallow cold mainly used to build a cold storage, intermediate cold mainly used to make ice, build an ice rink and a ski resort, deep cold mainly used to cryogrinding for air separation, etc.
If it is analyzed according to the fire economics, it can be known that only a large amount of electric energy is used to liquefy natural gas, and during the liquefaction process, it is then completed by a cryogenic process (about 8-50. OkW-h/t of electric energy is consumed), however, the carnot's theorem suggests that the fire efficiency for power generation is generally lower than 19.0070, and the actual efficiency is utilized even lower, yielding only about 50.0 kW-h/t of electricity, because both are far from reversible in the actual process, whereas if the point of energy utilization can be applied to the actual stage by stage, not only the irreversible degree can be effectively reduced, but also the economic benefit can be improved.
It is necessary to consider the restriction of each utilization condition around L NG receiving station when in practical application, make the cold energy perfectly utilized, and make the separation of C24 in the liquefied natural gas, can make the vaporized dry gas reduce to about 3/1T 13, which can greatly improve the market competitiveness.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The cold energy recycling device for the L NG gasification station is characterized by comprising a L NG evaporator and an intermediate medium evaporator, wherein the L NG evaporator circulates natural gas to the intermediate medium evaporator through a circulating pump, the intermediate medium evaporator attaches cold energy in the natural gas to the intermediate medium through the intermediate medium, and the intermediate medium processes the natural gas into high-pressure normal-temperature gas through a heat exchanger and then transmits the high-pressure normal-temperature gas to an intermediate medium turbine to expand to drive an engine to generate power.
2. The cold energy recycling device for the L NG vaporizer station, according to claim 1, wherein the L NG vaporizer is connected to raw natural gas through a L NG pump and separates natural gas from seawater through a L NG vaporizer.
3. The cold energy recycling device for L NG gasifying station as claimed in claim 1, wherein the intermediate medium turbine transfers the natural gas after extracting cold energy back to L NG evaporator for using natural gas as normal use.
4. The cold energy recycling device for the L NG gasifier station as claimed in claim 1, wherein the intermediate medium turbine converts the energy of the intermediate medium into kinetic energy when passing through the nozzle, and the fluid impacts the blades to drive the blades to rotate when passing through the impeller, thereby driving the turbine shaft to rotate and driving the generator to generate electricity.
5. The cold energy recycling device for the L NG gasification station, according to claim 4, wherein the intermediate medium is one of water, freon, carbon dioxide, methanol or ethylene glycol, and the intermediate medium enters the intermediate medium to perform work through turbine expansion, so as to drive the generator to work and output electric energy to the outside.
6. The cold energy recycling device for the L NG vaporizer as claimed in claim 1, wherein the L NG vaporizer is composed of a heating chamber and an evaporation chamber, the heating chamber provides heat for evaporation of the liquid to promote boiling and vaporization of the liquid, and the evaporation chamber completely separates gas phase from liquid phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010307477.XA CN111396161A (en) | 2020-04-18 | 2020-04-18 | L NG cold energy recycle device for vaporizing station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010307477.XA CN111396161A (en) | 2020-04-18 | 2020-04-18 | L NG cold energy recycle device for vaporizing station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111396161A true CN111396161A (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010307477.XA Pending CN111396161A (en) | 2020-04-18 | 2020-04-18 | L NG cold energy recycle device for vaporizing station |
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| Country | Link |
|---|---|
| CN (1) | CN111396161A (en) |
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2020
- 2020-04-18 CN CN202010307477.XA patent/CN111396161A/en active Pending
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Application publication date: 20200710 |
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