CN115164430A - CO applied to ship tail gas carbon capture 2 Transcritical refrigerating unit - Google Patents
CO applied to ship tail gas carbon capture 2 Transcritical refrigerating unit Download PDFInfo
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- CN115164430A CN115164430A CN202210646448.5A CN202210646448A CN115164430A CN 115164430 A CN115164430 A CN 115164430A CN 202210646448 A CN202210646448 A CN 202210646448A CN 115164430 A CN115164430 A CN 115164430A
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- pressure stage
- stage compressor
- fresh water
- heat exchanger
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 238000005057 refrigeration Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000013505 freshwater Substances 0.000 claims description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 239000003507 refrigerant Substances 0.000 claims description 20
- 239000013535 sea water Substances 0.000 claims description 12
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/325—Expansion valves having two or more valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
Abstract
The invention is applied to CO for carbon capture of ship tail gas 2 Transcritical refrigerating unit relates to refrigeration plant technical field, especially relates to a CO who is applied to boats and ships tail gas carbon entrapment 2 A transcritical refrigeration unit. The output ends of the high-pressure stage compressor and the medium-pressure stage compressor are connected with a high-pressure stage oil separator; high pressure stage oil separator outletAn air cooling device is arranged between the air end and the parallel heat exchanger; the liquid outlet end of the parallel heat exchanger, the back pressure valve and the flash tank are connected in sequence; one path of the gas outlet end of the flash tank returns to the intermediate-pressure stage compressor through the parallel heat exchanger, and the other path returns to the high-pressure stage compressor; the liquid outlet end of the flash tank is respectively connected with the medium-temperature expansion valve and the heat regenerator; the medium-temperature expansion valve is connected with the input end of the high-pressure stage compressor through the medium-temperature evaporator; the heat regenerator is connected with the low-pressure stage compressor; the output end of the low-pressure stage compressor is connected with the input end of the high-pressure stage compressor through the desuperheater.
Description
Technical Field
The invention is applied to the CO trapped by the carbon in the ship tail gas 2 Transcritical refrigerating unit relates to refrigeration plant technical field, especially relates to a CO who is applied to boats and ships tail gas carbon entrapment 2 A transcritical refrigeration unit.
Background
In the 80's of the 20 th century, with the rapid development of the freezing and refrigerating industry and the adverse effect of CFCs on the ozone layer and atmospheric warming, the requirement for replacement of CFCs refrigerants has been raised worldwide from the standpoint of environmental protection, and one of the ubiquitous opinions is the use of natural refrigerants as replacement products, so that CO is used as a substitute product 2 Becomes a hot spot; however, conventionally, CO has been used in many cases 2 The refrigerating system is a cold-carrying system, and also needs to be matched with a fluorine-containing refrigerant for use, and the fluorine-containing refrigerant can cause damage to the environment.
Aiming at the problems in the prior art, a novel CO applied to the carbon capture of ship tail gas is researched and designed 2 It is necessary to overcome the problems of the prior art by transcritical refrigeration units.
Disclosure of Invention
Existing CO proposed according to the above prior art 2 The refrigerating system needs to be matched with fluorine-containing cold for cold-carrying systemThe media are used together, the environment can be damaged, the heat exchange side of the air cooler needs to consume electric energy and other technical problems, and the CO applied to the carbon capture of the tail gas of the ship is provided 2 A transcritical refrigeration unit. The invention mainly utilizes CO 2 As a refrigerant of a transcritical refrigeration system, the carbon capture is carried out on the ship tail gas, so that the COP of the system is improved, and the purposes of high efficiency and energy saving are achieved.
The technical means adopted by the invention are as follows:
CO applied to ship tail gas carbon capture 2 A transcritical refrigeration unit comprising: the system comprises a high-pressure stage compressor, a medium-pressure stage compressor, a low-pressure stage compressor, a high-pressure stage oil separator, an air cooling device, a superheater, a parallel heat exchanger, a back pressure valve, a flash tank, a medium-temperature expansion valve, a medium-temperature evaporator and a heat regenerator;
further, the output ends of the high-pressure stage compressor and the medium-pressure stage compressor are connected with the high-pressure stage oil separator;
further, an air cooling device is arranged between the air outlet end of the high-pressure-stage oil separator and the parallel heat exchanger;
further, the liquid outlet end of the parallel heat exchanger, a back pressure valve and the flash tank are sequentially connected, and the back pressure valve forms a gas-liquid two-phase state after throttling and enters the flash tank;
furthermore, one path of the gas outlet end of the flash tank returns to the medium-pressure stage compressor through the parallel heat exchanger, the other path returns to the high-pressure stage compressor, and a high-pressure valve is arranged between the flash valve and the high-pressure stage compressor;
further, the liquid outlet end of the flash tank is respectively connected with the medium-temperature expansion valve and the heat regenerator;
further, the medium temperature expansion valve is connected with the input end of the high-pressure stage compressor through the medium temperature evaporator;
further, the heat regenerator is connected with the low-pressure stage compressor;
further, the output of the low pressure stage compressor is connected to the input of the high pressure stage compressor through a desuperheater.
Further, a gas separator is arranged in front of the input end of the high-pressure stage compressor;
further, the gas separator is respectively connected with a high-pressure valve, a medium-temperature evaporator and a de-superheater.
Furthermore, a loop consisting of a low-temperature expansion valve, a low-temperature evaporator I and a low-temperature evaporator II is arranged on the heat regenerator;
furthermore, the heat regenerator is connected with the low-temperature expansion valve, the first low-temperature evaporator and the second low-temperature evaporator in sequence, and the output end of the low-temperature evaporator group is connected with the appointment period.
Further, the air cooling apparatus includes: an air cooler, a water pump and a seawater-fresh water heat exchanger;
further, the output end of the fresh water side of the air cooler is connected with the input end of the fresh water side of the seawater-fresh water heat exchanger;
further, the output end of the fresh water side of the seawater-fresh water heat exchanger is connected with the input end of the fresh water side of the air cooler through a water pump;
furthermore, two sides of the water pump are respectively provided with a shock-proof throat, so that the water pump is prevented from being damaged by vibration during operation of the water pump;
further, the input end of the refrigerant side of the air cooler is connected with the high-pressure-stage oil separator, and the output end of the air cooler is connected with the parallel heat exchanger;
furthermore, the input end of the seawater side of the seawater-fresh water heat exchanger is connected with a seawater inlet, and the output end of the seawater-fresh water heat exchanger is connected with a seawater outlet.
Furthermore, a differential pressure type flow switch is arranged between the output end and the input end of the fresh water side of the air cooler and used for detecting the flow of the two sides of the fresh water and meeting the heat exchange requirement of the air cooler.
Furthermore, an expansion tank is arranged between the output end of the fresh water side of the seawater-fresh water heat exchanger and the water pump, and when the temperature changes in the closed fresh water waterway system, the operation safety of the system is ensured.
Furthermore, a water filling port is arranged on a pipeline between the output end differential pressure type flow switches on the fresh water side of the air cooler.
Furthermore, an air relief port is arranged on the pipeline between the differential pressure type flow switch and the fresh water side input end of the seawater-fresh water heat exchanger.
Furthermore, a water outlet is arranged on the pipeline of the fresh water side input end of the water pump and the air cooler.
The working process of the invention is as follows:
firstly, the high-pressure stage compressor and the medium-pressure stage compressor are used for converting CO into CO 2 Refrigerant is compressed to a high-temperature high-pressure state and enters a high-pressure stage oil separator, the high-pressure stage oil separator separates frozen oil in refrigerant, the separated oil enters an oil tank and returns to a compressor, and the separated high-temperature high-pressure refrigerant gas enters an air cooling device for cooling and then enters a parallel heat exchanger, so that the gas returning from a flash tank to a medium-pressure stage compressor is reheated, liquid drops are prevented from returning to the compressor, and the compressor is prevented from being damaged due to liquid impact; the gas in the flash tank returns to the intermediate-pressure stage compressor from the parallel heat exchanger, and the gas returns to the high-pressure stage compressor from the high-pressure valve, enters the gas separator and returns to the high-pressure stage compressor, and liquid CO is obtained 2 Respectively entering a medium temperature expansion valve and a heat regenerator, entering a medium temperature evaporator after throttling by the medium temperature expansion valve, evaporating the temperature of the medium temperature evaporator to-10 ℃, and introducing CO into the medium temperature evaporator 2 The tail gas mainly carries out sensible heat exchange in the medium-temperature evaporator without state change, and the refrigerant side returns to the high-pressure-stage return air, enters the air separator and returns to the high-pressure-stage compressor; entering an 18 heat regenerator (enabling a refrigerant returned by a low-temperature evaporator to enter a low-pressure stage compressor for heat regeneration, preventing liquid drops from returning to the compressor, thereby generating liquid impact and damaging the compressor), cooling, entering a low-temperature expansion valve for throttling, and then sequentially entering a second low-temperature evaporator, a first low-temperature evaporator, a second low-temperature evaporator and a tail gas CO, wherein the evaporation temperature of the first low-temperature evaporator is-40 ℃, and the tail gas CO is discharged 2 The latent heat exchange is completed in the low-temperature evaporator, namely the gaseous state is condensed into the liquid state, and the heat exchange is completed by the refrigerant CO 2 And returning to the low-pressure stage compressor through the heat regenerator to complete a complete refrigeration cycle.
The cooling process of the air cooling device comprises the following steps:
first of all, high-temperature and high-pressure CO from the compressor 2 The gas enters the air cooler (refrigerant side) from the flow direction mark and exchanges heat with the air cooler (fresh water side), the temperature of the refrigerant side is reduced, and the temperature of the fresh water is measuredAnd (3) rising, after heat exchange is completed, the fresh water with the raised temperature enters a seawater-fresh water heat exchanger (fresh water side) to perform heat exchange with the seawater-fresh water heat exchanger (seawater side), the temperature of the fresh water is reduced, the temperature of the seawater side rises, after heat exchange is completed, the fresh water enters a water pump and enters an air cooler (fresh water side) to perform next heat exchange.
The shock-proof throats are arranged on two sides of the water pump, so that the water pump is prevented from being damaged by vibration during operation of the water pump; the differential pressure type flow switches are arranged at two ends of the air cooler (fresh water side) to monitor the flow at two sides of the fresh water so as to meet the heat exchange requirement of the air cooler; a water filling port, a water discharging port and an air discharging port are arranged, so that the requirement of water changing during replacing parts of the closed fresh water channel is met; arrange the expansion tank, when taking place temperature variation in closed fresh water waterway system, guarantee system operation security, the pressure grow is risen to the temperature, and in water will be pressed into the jar, the temperature reduction pressure reduces, and water flows out from the jar to guarantee closed water cycle operation security.
Compared with the prior art, the invention has the following advantages:
1. the invention provides CO applied to the carbon capture of ship tail gas 2 The transcritical refrigerating unit adopts transcritical refrigerating technology, and the whole closed refrigerating system adopts CO 2 As a refrigerant and is CO 2 The COP of the system is improved, and the system is efficient and energy-saving;
2. the invention provides CO applied to the carbon capture of ship tail gas 2 The transcritical refrigerating unit adopts a CO2 refrigerant, is green and environment-friendly and accords with the industrial development concept;
3. the invention provides CO applied to the carbon capture of ship tail gas 2 The transcritical refrigerating unit is applied to ship tail gas absorption, the refrigeration industry field is widened, and the product meets the carbon neutral and large background;
4. the invention provides CO applied to the carbon capture of ship tail gas 2 The transcritical refrigerating unit ensures that the water pump cannot be damaged by vibration during operation of the water pump by arranging the shock absorbing throats on two sides of the water pump;
5. the invention provides CO applied to the carbon capture of ship tail gas 2 The transcritical refrigerating unit is provided with a water filling port, a water discharging port and an air discharging port in an air cooling device, so that the requirement of water replacement during replacement of parts of a closed fresh water path is met;
6. the invention provides CO applied to the carbon capture of ship tail gas 2 The transcritical refrigerating unit is characterized in that an expansion tank is arranged in an air cooling device, when the temperature changes in a closed fresh water waterway system, the operation safety of the system is ensured, the temperature rises and the pressure becomes large, water is pressed into the tank, the temperature reduces and the pressure decreases, the water flows out of the tank, and therefore the closed water circulation operation safety is ensured;
7. the invention provides CO applied to the carbon capture of ship tail gas 2 The air cooling device of the transcritical refrigerating unit adopts a water cooling type structure, namely, a refrigerant exchanges heat with a water channel, seawater is introduced into a cold source, closed type fresh water circulation is adopted, fresh water resources are saved, the low temperature of the seawater is used, the conventional water cooling type structure is required to cool fresh water electric energy, energy is saved, and the environment is protected and accords with the industrial development concept.
In conclusion, the technical scheme of the invention solves the problem of the existing CO in the prior art 2 The refrigeration system needs to be used together with a fluorine-containing refrigerant for carrying cold, so that the environment is damaged, and the heat exchange side of the air cooler needs to consume electric energy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a system diagram of the present invention;
FIG. 5 is a system diagram of an air cooling apparatus according to the present invention.
In the figure:
1. the system comprises a high-pressure stage compressor 2, a medium-pressure stage compressor 3, a low-pressure stage compressor 4, a gas separator 5, a high-pressure stage oil separator 6, a gas cooling device 7, a de-superheater 8, a parallel heat exchanger 9, a back pressure valve 10, a flash tank 11, a high-pressure valve 12, a liquid storage tank 13, a medium-temperature expansion valve 14, a medium-temperature evaporator 15, a low-temperature evaporator I16, a low-temperature evaporator II 17, a low-temperature expansion valve 18 and a heat regenerator
61. Air cooler 62, differential pressure type flow switch 63, shock absorbing throat 64, water pump 65, expansion tank 66 and seawater-fresh water heat exchanger.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
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 only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings for the convenience of description and simplicity of description, and that these directional terms, unless otherwise specified, do not indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "above … …", "above … …", "above … … upper surface", "above", etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in the figure, the invention provides CO applied to the carbon capture of the tail gas of a ship 2 A transcritical refrigeration unit comprising: the system comprises a high-pressure stage compressor 1, a medium-pressure stage compressor 2, a low-pressure stage compressor 3, a high-pressure stage oil separator 5, an air cooling device 6, a superheater 7, a parallel heat exchanger 8, a back pressure valve 9, a flash tank 10, a medium-temperature expansion valve 13, a medium-temperature evaporator 14 and a heat regenerator 18; the output ends of the high-pressure stage compressor 1 and the medium-pressure stage compressor 2 are connected with a high-pressure stage oil separator 5; an air cooling device 6 is arranged between the air outlet end of the high-pressure stage oil separator 5 and the parallel heat exchanger 8; the liquid outlet end of the parallel heat exchanger 8, the backpressure valve 9 and the flash tank 10 are sequentially connected, and the backpressure valve 9 forms a gas-liquid two-phase state after throttling and enters the flash tank 10; one path of the gas outlet end of the flash tank 10 returns to the intermediate-pressure stage compressor 2 through the parallel heat exchanger 8, the other path returns to the high-pressure stage compressor 1, and a high-pressure valve 11 is arranged between the flash valve 10 and the high-pressure stage compressor 1; the liquid outlet end of the flash tank 10 is respectively connected with a medium temperature expansion valve 13 and a heat regenerator 18; the medium temperature expansion valve 13 is connected with the input end of the high pressure stage compressor 1 through a medium temperature evaporator 14; the heat regenerator 18 is connected with the low-pressure stage compressor 3; the output of the low-pressure stage compressor 3 is connected to the input of the high-pressure stage compressor 1 via a desuperheater 7.
The front of the input end of the high-pressure stage compressor 1 is provided with a gas separator 4; the gas separator 4 is respectively connected with a high-pressure valve 11, a medium-temperature evaporator 14 and a desuperheater 7.
A loop consisting of a low-temperature expansion valve 17, a first low-temperature evaporator 15 and a second low-temperature evaporator 16 is arranged on the heat regenerator 18; the heat regenerator 18 is connected with a low-temperature expansion valve 17, a first low-temperature evaporator 15 and a second low-temperature evaporator 16 in sequence, and the output end of the low-temperature evaporator group is connected with the appointment period 18.
The air cooling device 6 includes: an air cooler 61, a water pump 64, and a seawater-fresh water heat exchanger 66; the output end of the fresh water side of the air cooler 61 is connected with the input end of the fresh water side of the seawater-fresh water heat exchanger 66; the output end of the fresh water side of the seawater-fresh water heat exchanger 66 is connected with the input end of the fresh water side of the air cooler 61 through a water pump 64; two sides of the water pump 64 are respectively provided with a shock absorption throat 63, so that the water pump 64 is prevented from being damaged by vibration generated when the water pump 64 operates; the input end of the refrigerant side of the air cooler 61 is connected with the high-pressure-stage oil separator 5, and the output end is connected with the parallel heat exchanger 8; the seawater-fresh water heat exchanger 66 has an input end connected to the seawater inlet and an output end connected to the seawater outlet.
A differential pressure type flow switch 62 is arranged between the output end and the input end of the fresh water side of the air cooler 61 and used for detecting flow on two sides of the fresh water and meeting the heat exchange requirement of the air cooler 61.
An expansion tank 65 is arranged between the output end of the fresh water side of the seawater-fresh water heat exchanger 66 and the water pump 64, and when temperature changes in the closed fresh water waterway system, the operation safety of the system is ensured.
A water filling port is arranged on a pipeline between the output end differential pressure type flow switches 62 on the fresh water side of the air cooler 61.
A gas relief port is arranged on the pipeline between the pressure difference type flow switch 62 and the fresh water side input end of the seawater-fresh water heat exchanger 66.
The water pump 64 and the pipeline of the fresh water side input end of the air cooler 61 are provided with water outlets.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. CO applied to ship tail gas carbon capture 2 A transcritical refrigeration unit, characterized by:
the CO applied to the carbon capture of the ship tail gas 2 A transcritical refrigeration unit comprising: the system comprises a high-pressure stage compressor (1), a medium-pressure stage compressor (2), a low-pressure stage compressor (3), a high-pressure stage oil separator (5), an air cooling device (6), a superheater (7), a parallel heat exchanger (8), a back pressure valve (9), a flash tank (10), a medium-temperature expansion valve (13), a medium-temperature evaporator (14) and a heat regenerator (18);
the output ends of the high-pressure stage compressor (1) and the medium-pressure stage compressor (2) are connected with a high-pressure stage oil separator (5);
an air cooling device (6) is arranged between the air outlet end of the high-pressure stage oil separator (5) and the parallel heat exchanger (8);
the liquid outlet end of the parallel heat exchanger (8), the back pressure valve (9) and the flash tank (10) are sequentially connected, and the back pressure valve (9) forms a gas-liquid two-phase state after throttling and enters the flash tank (10);
one path of the air outlet end of the flash tank (10) returns to the medium-pressure stage compressor (2) through the parallel heat exchanger (8), the other path returns to the high-pressure stage compressor (1), and a high-pressure valve (11) is arranged between the flash valve (10) and the high-pressure stage compressor (1);
the liquid outlet end of the flash tank (10) is respectively connected with the medium-temperature expansion valve (13) and the heat regenerator (18);
the medium temperature expansion valve (13) is connected with the input end of the high-pressure stage compressor (1) through a medium temperature evaporator (14);
the heat regenerator (18) is connected with the low-pressure stage compressor (3);
the output end of the low-pressure stage compressor (3) is connected with the input end of the high-pressure stage compressor (1) through a superheater (7).
2. CO for use in carbon capture in marine exhaust according to claim 1 2 A transcritical refrigeration unit, characterized by:
the gas separator (4) is arranged in front of the input end of the high-pressure stage compressor (1);
the gas separator (4) is respectively connected with the high-pressure valve (11), the medium-temperature evaporator (14) and the de-superheater (7).
3. CO for use in carbon capture in marine exhaust gas according to claim 1 2 A transcritical refrigeration unit, characterized by:
a loop consisting of a low-temperature expansion valve (17), a first low-temperature evaporator (15) and a second low-temperature evaporator (16) is arranged on the heat regenerator (18);
the heat regenerator (18) is connected with the low-temperature expansion valve (17), the first low-temperature evaporator (15) and the second low-temperature evaporator (16) in sequence, and the output end of the low-temperature evaporator group is connected with the appointment period (18).
4. CO for use in carbon capture in marine exhaust according to claim 1 2 A transcritical refrigeration unit, characterized by:
the air cooling device (6) comprises: an air cooler (61), a water pump (64) and a seawater-fresh water heat exchanger (66);
the output end of the fresh water side of the air cooler (61) is connected with the input end of the fresh water side of the seawater-fresh water heat exchanger (66);
the output end of the fresh water side of the seawater-fresh water heat exchanger (66) is connected with the input end of the fresh water side of the air cooler (61) through a water pump (64);
two sides of the water pump (64) are respectively provided with a shock-absorbing throat (63) to ensure that the water pump (64) is not damaged by vibration when the water pump (64) operates;
the input end of the refrigerant side of the air cooler (61) is connected with the high-pressure-stage oil separator (5), and the output end of the air cooler is connected with the parallel heat exchanger (8);
the input end of the seawater side of the seawater-fresh water heat exchanger (66) is connected with a seawater inlet, and the output end of the seawater-fresh water heat exchanger is connected with a seawater outlet.
5. CO for use in carbon capture in marine exhaust according to claim 4 2 A transcritical refrigeration unit, characterized by:
a differential pressure type flow switch (62) is arranged between the output end and the input end of the fresh water side of the air cooler (61) and used for detecting the flow on the two sides of the fresh water and meeting the heat exchange requirement of the air cooler (61).
6. CO for use in carbon capture in marine exhaust according to claim 4 2 A transcritical refrigeration unit, characterized by:
an expansion tank (65) is arranged between the output end of the fresh water side of the seawater-fresh water heat exchanger (66) and the water pump (64), and when the temperature changes in the closed fresh water waterway system, the operation safety of the system is ensured.
7. CO for use in carbon capture in marine exhaust according to claim 5 2 A transcritical refrigeration unit, characterized by:
and a water filling port is arranged on a pipeline between the output end differential pressure type flow switches (62) on the fresh water side of the air cooler (61).
8. CO for use in carbon capture in marine exhaust according to claim 7 2 A transcritical refrigeration unit, characterized by:
an air relief port is arranged on a pipeline between the differential pressure type flow switch (62) and the input end of the fresh water side of the seawater-fresh water heat exchanger (66).
9. CO for use in carbon capture in marine exhaust according to claim 6 2 A transcritical refrigeration unit, characterized by:
and the water pump (64) and the pipeline of the fresh water side input end of the air cooler (61) are provided with water outlets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210646448.5A CN115164430A (en) | 2022-06-08 | 2022-06-08 | CO applied to ship tail gas carbon capture 2 Transcritical refrigerating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210646448.5A CN115164430A (en) | 2022-06-08 | 2022-06-08 | CO applied to ship tail gas carbon capture 2 Transcritical refrigerating unit |
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| CN115164430A true CN115164430A (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210646448.5A Pending CN115164430A (en) | 2022-06-08 | 2022-06-08 | CO applied to ship tail gas carbon capture 2 Transcritical refrigerating unit |
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| CN (1) | CN115164430A (en) |
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| US20060196225A1 (en) * | 2003-03-31 | 2006-09-07 | Myung-Bum Han | System of energy efficiency for refrigeration cycle |
| US20160102901A1 (en) * | 2013-05-03 | 2016-04-14 | Hill Phoenix, Inc. | Systems and methods for pressure control in a co2 refrigeration system |
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Address after: 116600 No. 8 Songlan Street, Dalian Economic and Technological Development Zone, Liaoning Province Applicant after: Bingshan Songyang Refrigerator System (Dalian) Co.,Ltd. Address before: No. 8 Songlan Street, Economic and Technological Development Zone, Dalian City, Liaoning Province, 116000 Applicant before: PANASONIC REFRIGERATOR SYSTEM (DALIAN) CO.,LTD. |
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Effective date of registration: 20230628 Address after: No. 106 Liaohe East Road, Dalian Economic and Technological Development Zone, Liaoning Province, 116600 Applicant after: Iceberg cold and hot technology Co.,Ltd. Address before: 116600 No. 8 Songlan Street, Dalian Economic and Technological Development Zone, Liaoning Province Applicant before: Bingshan Songyang Refrigerator System (Dalian) Co.,Ltd. |