CN113251469B - Multistage waste heat recovery heat supply oxygenerator group - Google Patents
Multistage waste heat recovery heat supply oxygenerator group Download PDFInfo
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- CN113251469B CN113251469B CN202110517227.3A CN202110517227A CN113251469B CN 113251469 B CN113251469 B CN 113251469B CN 202110517227 A CN202110517227 A CN 202110517227A CN 113251469 B CN113251469 B CN 113251469B
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- 238000011084 recovery Methods 0.000 title claims abstract description 24
- 239000002918 waste heat Substances 0.000 title claims abstract description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000001301 oxygen Substances 0.000 claims abstract description 96
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 96
- 238000001179 sorption measurement Methods 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 15
- 239000003507 refrigerant Substances 0.000 claims description 51
- 239000007789 gas Substances 0.000 claims description 43
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 26
- 229910052802 copper Inorganic materials 0.000 claims description 26
- 239000010949 copper Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 7
- 230000003584 silencer Effects 0.000 claims description 2
- 206010021143 Hypoxia Diseases 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 3
- 230000007954 hypoxia Effects 0.000 abstract description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 3
- 206010067484 Adverse reaction Diseases 0.000 abstract description 2
- 230000006838 adverse reaction Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000002912 waste gas Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 208000024891 symptom Diseases 0.000 description 2
- 206010008479 Chest Pain Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 208000008445 altitude sickness Diseases 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 208000027906 leg weakness Diseases 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- AHLBNYSZXLDEJQ-FWEHEUNISA-N orlistat Chemical compound CCCCCCCCCCC[C@H](OC(=O)[C@H](CC(C)C)NC=O)C[C@@H]1OC(=O)[C@H]1CCCCCC AHLBNYSZXLDEJQ-FWEHEUNISA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 208000013220 shortness of breath Diseases 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
-
- 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
- F25B43/003—Filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F17/00—Removing ice or water from heat-exchange apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses a multi-section waste heat recovery heat supply oxygen generator set, which comprises an oxygen generation module, a heating module and an auxiliary heat source module, wherein the oxygen generation module comprises an air compressor, a multi-stage high-pressure filter, three heat exchangers, a pressure stabilizing tank, two adsorption towers, an oxygen storage tank and a humidifying bottle; the rear part of the air compressor is connected with a multi-stage high-pressure filter, three heat exchangers and a pressure stabilizing tank; a stop valve and an electromagnetic valve are arranged between the pressure stabilizing tank and the adsorption tower which is connected in parallel; a pressure equalizing valve and two throttle valves are arranged between the two adsorption towers and the air storage tank; a one-way valve is arranged between the throttle valve and the air storage tank, and a pressure limiting valve and a flowmeter are arranged between the air storage tank and the humidifying bottle; the heating module is connected with the oxygen generating module. The invention fully combines the oxygen generating system and the heat pump system, can supply oxygen, humidify and heat simultaneously, can reduce adverse reactions caused by hypoxia, cold drying and the like to personnel in high-altitude areas, reduces energy dissipation to realize heat recovery and utilization, and meets the actual demands of the high-altitude areas.
Description
Technical Field
The invention relates to a heat supply oxygen generator set, in particular to a multi-section waste heat recovery heat supply oxygen generator set.
Background
As the altitude of the high altitude area is increased, the atmospheric pressure is reduced, and the plateau climate with obvious characteristics of hypoxia, low temperature, strong wind, dryness and the like is formed. Aiming at the indoor environment of a high-altitude area, the relative humidity of the indoor environment needs to be improved while the thermal comfort of personnel is ensured, and the requirement of the personnel on oxygen is met. The traditional oxygen supply unit can only realize oxygen supply to the high-altitude indoor environment through pressure swing adsorption, membrane separation and other methods, but can not realize indoor heating and humidification, and solves the problem of indoor drying, so that the comfort requirement of personnel on the indoor environment can not be met.
In high altitude areas, the climate change is very fast, even extreme weather can occur, but the calculation of the heat load does not guarantee the extreme weather, when the weather is very cold, the heat supplied by the air conditioner is insufficient, an auxiliary heat source is needed to be added, the common auxiliary heat source is mainly an electric heating heat source, and the energy consumption is high.
In addition, the waste heat of the oxygenerator group module in the air compressor part is not fully utilized, and the heat of the compressed high-temperature and high-pressure air can be recycled in the cooling and dehumidifying process. In summary, performing waste heat recovery of the oxygenerator set, improving cop of the set, and meeting the needs of personnel in high altitude areas on indoor environments are all problems to be solved at present.
Disclosure of Invention
Aiming at the problems that the existing oxygenerator set can not realize indoor heating and humidification and the waste heat of an air compressor part is not fully utilized, the invention aims to provide the multistage waste heat recovery heating oxygenerator set.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a multistage waste heat recovery heat supply oxygenerator group, includes oxygen generation module, heating module and auxiliary heat source module, wherein:
the oxygen generation module comprises an air compressor, a multistage high-pressure filter, a three-phase heat exchanger, a pressure stabilizing tank, two adsorption towers, an oxygen storage tank and a humidifying bottle; the air compressor is sequentially connected with a high-pressure filter, a three-phase heat exchanger and a pressure stabilizing tank, and a second pressure gauge, a thermometer and a check valve are sequentially arranged on a pipeline between the loose three-phase heat exchanger and the pressure stabilizing tank; a stop valve and an electromagnetic valve are sequentially arranged on a pipeline between the pressure stabilizing tank and the two parallel adsorption towers, and the two adsorption towers and the silencer are respectively connected after the electromagnetic valve is discharged; a pressure equalizing valve and two throttle valves are sequentially connected in parallel between the two adsorption towers and the oxygen storage tank in parallel; a one-way valve is arranged between the throttle valve and the air storage tank, and a pressure limiting valve and a flowmeter are arranged between the air storage tank and the humidifying bottle 23;
the heating module is respectively connected with an air compressor, a three-phase heat exchanger and a humidifying bottle in the oxygen generation module;
the auxiliary heat source module is connected with the muffler, the indoor heat exchanger and the three-phase heat exchanger in the oxygen generating module.
Further, the heating module comprises an air compressor heat exchanger, a first pressure gauge, a refrigerant compressor, an indoor heat exchanger, a throttle valve, a third valve, a fourth valve and a fifth valve, wherein when the third valve and the fifth valve are closed, the fourth valve is opened, the heating module is of a serial structure, an outlet end of the refrigerant compressor is sequentially connected with the indoor heat exchanger, the throttle valve, the three-phase heat exchanger and the air compressor heat exchanger, and finally, the heating module is connected with an inlet end of the refrigerant compressor; when the third valve and the fifth valve are opened, the fourth valve is closed, the heating module is of a parallel structure, the outlet end of the refrigerant compressor 6 is connected with the indoor heat exchanger 7 and the throttle valve 8, a tee joint behind the throttle valve 8 realizes that the three-phase heat exchanger 4 and the air compressor heat exchanger 2 are connected in parallel, and the refrigerant is collected and then is connected into the inlet end of the refrigerant compressor 6; the first pressure gauge 5 is arranged between the air compressor heat exchanger 2 and the inlet of the refrigerant compressor 6; the air compressor heat exchanger is arranged on the shell of the air compressor; the outlet of the flowmeter is connected with the inlet of the humidifying bottle after being led into the indoor heat exchanger.
Further, the auxiliary heat source module comprises a first valve and a second valve, wherein the first valve is arranged on a pipeline between the three-phase heat exchanger and the muffler, the second valve is arranged on a pipeline between the indoor heat exchanger and the muffler, and the first valve and the second valve are connected in parallel.
Further, the gas pressure of the high-temperature high-pressure gas in the air compressor is 0.15Mpa-0.5Mpa, and the gas outlet temperature is 20 ℃ to 30 ℃ higher than the ambient temperature.
Further, the three-phase heat exchanger comprises two groups of heat exchange fins which are arranged up and down and are connected in series, a box body is respectively fixed on the side face of each group of heat exchange fins, and an axial flow fan is arranged in the box body.
Furthermore, each group of heat exchange fins adopts 2 rows and 10 rows of copper pipes, and the copper pipes are longitudinally connected.
Further, the pipe diameter of the copper pipe is 10mm, the distance between the pipes is 10mm, the center distance between the upper copper pipe and the lower copper pipe is 20mm, the distance between the first row of copper pipes and the edge of the heat exchange fin is 10mm, the distance between the first row of copper pipes and the second row of copper pipes is 10mm, and the distance between the second row of copper pipes and the edge of the heat exchange fin is 10mm.
Further, each group of heat exchange fins has a width of 200mm and a height of 200mm, the box bodies are 200mm multiplied by 260mm multiplied by 200mm, and the space between the two box bodies is 100mm.
Further, the air volume of the axial flow fan is 155m 3 /h。
Further, the adsorption tower 16 is a pressure swing adsorption tower.
Compared with the prior art, the invention has the following advantages:
1. the oxygen generating module extracts oxygen from air, humidifies the air and then introduces the air into a room, so that the oxygen concentration and the humidity in the room are improved, the oxygen generation and the heating can be realized, and meanwhile, the oxygen load and the heat load in the room are met. In the heating module, the indoor heat exchanger is used as a condenser and is placed indoors to release heat so as to achieve a heating effect, and the heat of the indoor heat exchanger is respectively from the heat release of the refrigerant in the indoor heat exchanger, the heat energy generated by the air compressor is absorbed by the air compressor, the heat energy of high-temperature high-pressure air is absorbed by the three-phase heat exchanger, and the waste heat of the oxygen generating module is recovered. In conclusion, the unit fully combines the oxygen generation system with the heat pump system, can supply oxygen, humidify and heat simultaneously, can reduce adverse reactions brought by low-pressure hypoxia, cold drying and other personnel in high-altitude areas, reduces energy dissipation to realize heat recovery and utilization, and meets the actual demands of the high-altitude areas.
2. In the invention, the waste gas (mainly nitrogen and other gases) discharged from the adsorption tower 16 has certain kinetic energy and heat, and the gas passes through the electromagnetic valve 14 and the muffler 15 in sequence and then is introduced into the three-phase heat exchanger 4. On one hand, the heat of the residual gas discharged through the muffler 15 is fully utilized, and on the other hand, the kinetic energy of the part of gas is utilized to spray the three-phase heat exchanger 4, so that the heat exchange in the heat exchange is enhanced. The oxygen supply module requires a high water vapor content of the gas entering the adsorption tower 16 from the viewpoint of the quality of the gas, and therefore, the water vapor in the air must be removed in advance, so that the water vapor content of the gas exiting the adsorption tower 16 is very low. The residual gas is introduced into the three-phase heat exchanger 4, so that the frosting problem of the three-phase heat exchanger 4 can be reduced to a great extent, the energy dissipation is reduced, and the defrosting can be realized with zero energy consumption.
3. According to the invention, the single-system serial-parallel structure of the heating module can be switched, so that the heat demands under different working conditions are met, the heat exchange efficiency of the system is improved, the running resistance of the system can be regulated, and the system can run more stably. In the invention, the three-phase heat exchanger 4 and the air compressor heat exchanger 2 are used as evaporators, which absorb the heat of the air with high temperature and high pressure and the heat generated by the compressor 1 respectively, and the three-phase heat exchanger 4 is taken as a main part and the air compressor heat exchanger 2 is taken as an auxiliary part in the serial form due to different generated heat, so that the refrigerant firstly passes through the three-phase heat exchanger 4 and then passes through the air compressor heat exchanger 2 in the arrangement sequence of the three-phase heat exchanger 4 and the air compressor heat exchanger 2. This arrangement has the great advantage that, as is well known, the refrigerant in the refrigerant compressor is in a gaseous state, and heat exchange is performed between the refrigerant and the air compressor 1 before the compressor enters the inlet, so as to achieve reheating of the refrigerant, thus ensuring that the refrigerant is in a gaseous state before entering the compressor 1, and preventing damage to the refrigerant compressor 6 due to liquid impact. In the parallel form, the three-phase heat exchanger 4 and the air compressor heat exchanger 2 are respectively arranged in two branch pipelines, the double evaporators do not divide main and auxiliary parts, and heat exchange is carried out simultaneously, so that the parallel structure can ensure that the system has small resistance and the operation is more stable. Meanwhile, according to the difference of heat of the three-phase heat exchanger 4 and the air compressor heat exchanger 2, the opening degree of the valve can be adjusted, and the flow rate of the refrigerant in the two branch pipelines can be adjusted, so that the parallel structure can ensure that the system operates more stably, and the temperature of the air side outlet in the three-phase heat exchanger 4 can be controlled.
4. In the process of obtaining oxygen, water vapor in the air is required to be removed, so that the oxygen production efficiency is improved. Therefore, the water vapor content in the produced oxygen is extremely low, but the relative humidity of the air is an important factor affecting the thermal comfort of the human body, and in cold high altitude areas, the relative humidity in the air cannot directly meet the thermal comfort requirement of the human body. The invention has the air humidifying device (namely a humidifying bottle) at the oxygen sending end, thus ensuring the requirement of the human body on the relative humidity of the air in the practical use environment.
5. According to the invention, the waste heat recovery device is added, waste gas (mainly nitrogen and other gases) discharged by the adsorption tower 16 has certain heat, and the waste heat recovery device is used for recovering the heat, so that the heat supply module can not meet the heat requirement of a room in extreme weather, and the heat replaces electric auxiliary heat to serve as an auxiliary heat source to ensure the thermal comfort of personnel moving in extreme air.
6. The invention can meet the requirement of changing the air quality in the room by reasonably arranging the component structure, the adjustment means of the time group can accurately meet the standard, and the secondary transformation engineering is simple and has lower cost.
Drawings
FIG. 1 is a schematic diagram of the operation of a series-parallel connection structure of a multi-stage waste heat recovery heat supply oxygenerator set of the present invention;
FIG. 2 is a schematic structural view of an oxygen generation module;
FIG. 3 is a schematic diagram of a series-parallel configuration of a heating module;
FIG. 4 is an isometric view of a three-phase heat exchanger;
FIG. 5 is a front view of a three-phase heat exchanger;
FIG. 6 is a left side view of a three-phase heat exchanger;
FIG. 7 is a right side view of a three-phase heat exchanger;
FIG. 8 is a rear view of a three-phase heat exchanger;
FIG. 9 is a top view of a three-phase heat exchanger;
FIG. 10 is a graph of air compressor wall temperature variation;
FIG. 11 is a graph of air compressor outlet and adsorption column inlet air temperature variation;
FIG. 12 is a schematic view of oxygen production concentration;
fig. 13 is a schematic diagram of the residual gas heat exchange temperature difference.
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Detailed Description
The invention has the functions of oxygen supply and heat supply, is designed for the areas with heat load and oxygen deficiency, and particularly creates a comfortable environment in the high-altitude cold areas. The working principle of the invention is shown in figure 1, the azimuth words and sequence numbers used in the invention are all based on figure 1, and the corresponding parts are all based on the figure.
As shown in fig. 1, the multi-stage waste heat recovery heat supply oxygen generator set of the present invention comprises an oxygen generation module, a heating module and an auxiliary heat source module, wherein:
the oxygen generation module is used for extracting oxygen from air and humidifying the air, providing enough oxygen and humidity for the indoor area and storing redundant oxygen. The oxygen generation module comprises an air compressor 1, a multi-stage high-pressure filter 3, a three-phase heat exchanger 4, a pressure stabilizing tank 12, two adsorption towers 16, an oxygen storage tank 20 and a humidifying bottle 23; the air compressor 1 is sequentially connected with a high-pressure filter 3, a three-phase heat exchanger 4 and a pressure stabilizing tank 12, and a second pressure gauge 9, a thermometer 10 and a check valve 11 are sequentially arranged on a pipeline between the three-phase heat exchanger 4 and the pressure stabilizing tank 12; a stop valve 13 and an electromagnetic valve 14 are sequentially arranged on a pipeline between the surge tank 12 and the two parallel adsorption towers 16, the two adsorption towers 16 and a muffler 15 are respectively connected after the electromagnetic valve 14 is discharged, and waste gas is discharged from the muffler 15; a pressure equalizing valve 17 and two throttle valves 18 are sequentially connected in parallel between the two adsorption towers 16 and the oxygen storage tank 20 which are connected in parallel; the equalizing valve 17 is used for equalizing the pressure of the two adsorption towers 16, and oxygen produced by the adsorption towers 16 is discharged from the upper part through the throttle valve 18; a one-way valve 19 is arranged between the throttle valve 18 and the air storage tank 20, and a pressure limiting valve 21 and a flowmeter 22 are arranged between the air storage tank 20 and the humidifying bottle 23.
The heating module is used for eliminating indoor heat load. The heating module is respectively connected with the air compressor 1, the three-phase heat exchanger 4 and the humidifying bottle 23 in the oxygen generating module and is used for absorbing the excessive heat quantity generated in the oxygen generating module and heating. The heating module realizes the serial-parallel conversion by opening and closing the third valve 26, the fourth valve 27 and the fifth valve 28, and specifically adopts the following serial-parallel structure: the air compressor comprises an air compressor heat exchanger 2, a first pressure gauge 5, a refrigerant compressor 6, an indoor heat exchanger 7, a throttle valve 8, a third valve 26, a fourth valve 27 and a fifth valve 28, wherein when the third valve 26 and the fifth valve 28 are closed, the fourth valve 27 is opened, the heating module is of a serial structure, the outlet end of the refrigerant compressor 6 is sequentially connected with the indoor heat exchanger 7, the throttle valve 8, the three-phase heat exchanger 4 and the air compressor heat exchanger 2, and finally is connected to the inlet end of the refrigerant compressor 6; when the third valve 26 and the fifth valve 28 are opened and the fourth valve 27 is closed, the heating module is in a parallel structure, the outlet end of the refrigerant compressor 6 is connected with the indoor heat exchanger 7 and the throttle valve 8, the three-way after the throttle valve 8 realizes that the three-phase heat exchanger 4 and the air compressor heat exchanger 2 are connected in parallel, and the refrigerant is collected and then is connected into the inlet end of the refrigerant compressor 6. In the parallel structure, the three-phase heat exchanger 4 and the air compressor heat exchanger 2 are respectively arranged in two branch pipelines, so that the system resistance is small and the system operation is more stable. A first pressure gauge 5 is arranged between the air compressor heat exchanger 2 and the inlet of the refrigerant compressor 6.
The air compressor heat exchanger 2 is arranged on the shell of the air compressor 1; the outlet of the flowmeter 22 is connected with the inlet of the humidifying bottle 23 after being led into the indoor heat exchanger 7.
The invention can meet the heat demands under different working conditions by switching the serial-parallel structure of the single system of the heat supply module, improves the heat exchange efficiency of the system, and can adjust the running resistance of the system so as to ensure that the system runs more stably.
The auxiliary heat source module is used for supplying heat when the heat of the heating module is insufficient, ensuring the thermal comfort of personnel, and is connected with the muffler 15 of the oxygen generating module, the indoor heat exchanger 7 of the heat pump module and the three-phase heat exchanger 4 of the oxygen generating module. The auxiliary heat source module includes a first valve 24 and a second valve 25, wherein the first valve 24 is disposed on a pipe between the three-phase heat exchanger 4 and the muffler 15, the second valve 25 is disposed on a pipe between the indoor heat exchanger 7 and the muffler 15, and the first valve 24 and the second valve 25 are connected in parallel. The waste gas (mainly nitrogen and other gases) discharged from the adsorption tower 16 sequentially passes through the electromagnetic valve 14 and the muffler 15, when the heat of the heat supply module is insufficient, the first valve 24 is closed, the second valve 25 is opened, the waste gas enters the indoor heat exchanger 7, and the heat in the waste gas is recovered; when the auxiliary heat source is not needed, the first valve 24 is opened, the second valve 25 is closed, and the waste gas is used for blowing the three-phase heat exchanger 4.
The working principle of the technical scheme is as follows:
the oxygen generation module is used for extracting oxygen from air and humidifying the air and then introducing the air into a room, the oxygen generation technology of the module adopts a pressure swing adsorption method to prepare oxygen, outdoor air passes through the air compressor 1, the air compressor 1 compresses the air due to reciprocating piston type movement, consumes electric energy and generates heat energy, the air is compressed into high-temperature and high-pressure gas, the pressure of the gas is controlled to be 0.15Mpa-0.5Mpa, and the temperature of the air outlet is 20 ℃ to 30 ℃. The high-temperature and high-pressure air passes through the filter 3 to remove dust and water vapor in the high-temperature and high-pressure air. In the pressure swing adsorption type oxygen generation mode, compressed air is cooled to normal temperature to realize high-efficiency oxygen generation rate, therefore, compressed air coming out of a high-pressure filter 3 passes through a three-phase heat exchanger 4, the compressed air is cooled to the normal temperature state, an air pressure gauge 9 and an air thermometer 10 measure the pressure and the temperature of the cooled compressed air, the cooled compressed air enters a pressure stabilizing tank 12 through a check valve 11, the compressed air after pressure stabilization enters two adsorption towers 16 connected in parallel through a stop valve 13 and an electromagnetic valve 14, zeolite molecular sieves in the adsorption towers separate oxygen, nitrogen and other gases, a double adsorption tower parallel mode is adopted, when one of the adsorption towers 16 works, the other adsorption tower is in a regeneration process, the two adsorption towers are mutually matched, oxygen is discharged from the upper part of the adsorption tower 16, and nitrogen and other gases are discharged from the lower part of the adsorption tower 16. The pressure equalizing valve 17 at the upper part of the adsorption tower 16 can equalize the pressure of the two adsorption towers, and the discharged oxygen enters the air storage tank 20 through the check valve 19 after the flow rate is regulated by the throttle valve 18, so that the prepared oxygen is stored. The flow meter 22 measures and monitors the flow rate of oxygen flowing into the room, because the oxygen produced by the oxygen producing system is free of water vapor, in order to ensure the comfortable requirement of human body breathing, oxygen needs to be humidified, oxygen enters the indoor heat exchanger 7 after coming out of the flow meter 22, meanwhile, indoor air is introduced into the indoor heat exchanger 7 to be mixed with oxygen for heating, and then the mixed oxygen-enriched gas is introduced into the humidifying bottle 23 for humidifying treatment and then is introduced into the room, and the humidified oxygen-enriched gas not only meets the oxygen requirement of the human body but also meets the comfortable requirement of the human body.
And the heating module adopts an air-conditioning heat pump system, wherein the indoor heat exchanger 7 releases heat, the three-phase heat exchanger 4 and the air compressor heat exchanger 2 absorb heat, a double evaporator (namely the three-phase heat exchanger 4 and the air compressor heat exchanger 2) is adopted, and the conversion between the series connection and the parallel connection of the double evaporator is realized through valve adjustment. The refrigerant is compressed into high-temperature high-pressure refrigerant gas by the refrigerant compressor 6, then passes through the indoor heat exchanger 7, the refrigerant is changed into high-pressure liquid from the high-temperature high-pressure gas, and the indoor air is heated by the indoor heat exchanger 7 by the released heat, so that the heat load of a room is met. After the refrigerant comes out of the indoor heat exchanger 7, the refrigerant passes through the throttle valve 8, the pressure of the refrigerant is reduced, if the third stop valve 26 and the fifth stop valve 28 are closed, the fourth stop valve 27 is opened, the double evaporators are in a series working state, the refrigerant passes through the three-phase heat exchanger 4 and then passes through the air compressor heat exchanger 2, heat is absorbed in the three-phase heat exchanger 4 and the air compressor heat exchanger 2, the refrigerant gradually changes from a liquid state to a gas state, and then the refrigerant returns to the refrigerant compressor 6 through the refrigerant pressure gauge 5. If the third stop valve 26 and the fifth stop valve 28 are opened, the fourth stop valve 27 is closed, the double evaporators are in a parallel operation state, the refrigerant respectively passes through the three-phase heat exchanger 4 and the air compressor heat exchanger 2, the refrigerant absorbs heat in the three-phase heat exchanger 4 and the air compressor heat exchanger 2 and gradually changes from a liquid state to a gas state, then the liquid state and the gas state are converged at the inlet of the compressor 1, finally the liquid state and the gas state are returned to the refrigerant compressor 6 through the refrigerant pressure gauge 5, and the reciprocating cycle is performed to provide heat for a room. The heat in the three-phase heat exchanger 4 and the air compressor heat exchanger 2 are absorbed by the refrigerant in the parallel connection mode respectively, the heat is more flexible and stable, the opening degree of a valve can be adjusted, the flow rate of the refrigerant of the two branches is adjusted, the heat exchange amount of the three-phase heat exchanger 4 is further controlled, and the outlet temperature of high-temperature and high-pressure air entering the three-phase heat exchanger 4 is controlled.
The auxiliary heat source module, because the residual gas is separated by the adsorption tower 16, also has a certain amount of heat, can collect and use this part of heat as auxiliary heat source, and auxiliary heat is added when the weather is cold. The residual gas firstly comes out of the pressure swing adsorption tower, then the first stop valve 24 and the second stop valve 25 are regulated, when encountering cold weather, the second stop valve 25 is opened to close the first stop valve 24, the residual air can enter the indoor heat exchanger 7 through the second stop valve 25, heat is brought into the indoor through a fan, the cooled residual gas is used as pure gas, no water vapor is contained, kinetic energy is utilized to be introduced into the three-phase heat exchanger 4, and the defrosting function is realized. When the weather is not very cold, the heat supply of the air conditioner can meet the heat load of a room, the first stop valve 24 is opened, the second stop valve 25 is closed, the residual gas is directly introduced into the three-phase heat exchanger 4, and the heat of the residual gas is used for defrosting.
In the process, high-temperature and high-pressure air flows out of the high-pressure filter 3, passes through one coil in the three-phase heat exchanger 4 and flows to the second pressure gauge 9; the refrigerant enters the other coil of the three-phase heat exchanger 4, and flows and exchanges heat with air from the two coils of the three-phase heat exchanger 4 respectively; the residual exhaust gas can be switched and regulated by the first valve 24 and the second valve 25 to enable the gas to pass through the indoor heat exchanger 7 and exchange heat.
Preferably, the three-phase heat exchanger 4 is a heat exchange device adopting a fin structure, as shown in fig. 4, the three-phase heat exchanger 4 comprises two groups of heat exchange fins arranged up and down and connected in series, a box body is respectively fixed on the side surface of each group of heat exchange fins, an axial flow fan is arranged in the box body, and the center of the fan is positioned at the center of the box body.
Preferably, as shown in fig. 5 and 6, each group of heat exchange fins adopts 2 rows and 10 lines of copper tubes, and the copper tubes are longitudinally connected. The diameter of the copper tubes is 10mm, the distance between the tubes is 10mm, the center distance between the upper copper tube and the lower copper tube is 20mm, the distance between the first row of copper tubes and the edges of the heat exchange fins is 10mm, the distance between the first row of copper tubes and the second row of copper tubes is 10mm, and the distance between the second row of copper tubes and the edges of the heat exchange fins is 10mm.
As shown in fig. 4, in use, the three-phase heat exchanger 4 is configured such that high-temperature and high-pressure air from the air compressor 1 passes through the first row of fins, throttled refrigerant passes through the second row of heat exchange fins, and flows out from the upper side to the lower side, respectively, thereby forming downstream heat exchange, and the refrigerant cools the high-temperature and high-pressure air to be in a high-pressure and normal-temperature state. In addition, the residual gas separated by the adsorption tower 16 is introduced into the three-phase heat exchanger 4 through the muffler 15 by the electromagnetic valve 14, and the jetting and heat exchange of the three-phase heat exchanger 4 are realized by utilizing the kinetic energy and the temperature of the residual gas.
Preferably, each group of heat exchange fins has a width of 200mm and a height of 200mm, the boxes have a width of 200mm x 260mm x 200mm, and the space between the two boxes is 100mm, so that the total height of the three-phase heat exchanger is 500mm.
Preferably, as shown in FIG. 8, the air volume of the axial flow fan is 155m 3 /h。
Preferably, the adsorption column 16 is a pressure swing adsorption column.
Preferably, the multistage high pressure filter 3 may be a multistage high pressure filter of model 015P produced by shenzhen, hui Jie mechanical and electrical equipments limited. The air compressor heat exchanger 2 may be an air compressor heat exchanger model JG1202-02 manufactured by nine-industry machine electric equipment limited, da.
To illustrate the effect of the invention, experimental study-related data are given:
the invention is mainly characterized in that the evaporator is utilized to absorb heat generated in the oxygen production process of the oxygen generator, wherein the main components for absorbing the heat are a three-phase heat exchanger 4 and an air compressor heat exchanger 2, so that the heat recovery effect can be seen by comparing the change of the wall temperature of the air compressor and the change of the temperature from the outlet of the air compressor to the inlet of the adsorption tower. As can be seen from fig. 10, the wall temperature of the air compressor also drops significantly, and as can be seen from fig. 11, the air temperature of the unit with the heating module drops significantly from the air compressor outlet to the adsorption tower inlet, in comparison with the oxygenerator without the heating module. The heat of the two parts is absorbed by the three-phase heat exchanger and the air compressor heat exchanger respectively.
As can be seen from fig. 11, the air temperature decreases from the outlet of the air compressor to the inlet of the adsorption tower, and therefore, it is necessary to consider the influence of heat recovery on the oxygen production effect, and then a comparative test of the oxygen production concentration is performed.
Through experiments, invalid data are removed, and the valid data are analyzed, so that the average concentration of produced oxygen is 87.46/%vol, and the average concentration of tail gas oxygen is 14.39%. Thus, the heat supply module absorbs the generated heat of the oxygenerator and has no influence on the oxygen production concentration, as shown in fig. 12, through the analysis of the test data.
The invention has the other characteristic that the auxiliary heat source is provided, the heat of the residual gas is used as the auxiliary heat source, and the thermal comfort requirement of indoor personnel in extreme weather is ensured, so that the heat exchange condition of the residual gas is subjected to test analysis.
As shown in fig. 13, the temperature of the gas at the time of leaving the adsorption tower is about 19.2 ℃, and after heat exchange by the indoor heat exchanger 7, the temperature is reduced to about 15 ℃, so that the temperature is reduced by 4.2 ℃, and the indoor heat exchanger 7 absorbs the energy and sends the energy into the room as an auxiliary heat source.
In conclusion, experiments prove that the invention has good oxygen production effect, fully utilizes heat, ensures indoor heat supply, simultaneously ensures indoor oxygen concentration, and simultaneously ensures the thermal comfort requirement of personnel in extreme weather.
To illustrate the effect of the invention, the following engineering practical cases are given:
taking Tibet Alli area as an example, tibet Alli area is located in southwest of China, western of Tibetan autonomous region, north of Qinghai-Tibet plateau (Qiang pond plateau), climate is in alpine desert climate, annual average temperature is 0.4-3.1 ℃, annual average precipitation is 69-173 mm, day-night temperature difference is large, outdoor extreme high temperature in summer is 21 ℃, daytime and temperature in 8 months is above 10 ℃, and night temperature is reduced to below 0 ℃. The minimum outdoor temperature in winter can reach more than 20 ℃ below zero, and the night can be colder, so that heating facilities are very needed in winter and summer in the Ali region so as to ensure the normal life of a human body indoors. In addition, the oxygen content of air in most of the Tibet areas is only 50% -60% of that in the inner land, the altitude of the Tibet areas is about 4300 m, the oxygen content is about 59%, and under the anoxic condition, the symptoms of altitude hypoxia can appear in people in plain areas, and the symptoms of chest distress, shortness of breath, headache, leg weakness and the like are shown. Therefore, the demand of oxygen in the areas is very large, especially in special places, hospitals, nursing homes, kindergartens and the like. The oxygen production efficiency of the invention is above 85%, the maximum oxygen production amount can reach 20L/min, and the oxygen breathing requirement of 5 to 6 people can be ensured. The heat supply module can be equivalent to 1.5 air conditioners, the heating capacity is about 3500W, and the heat supply module can meet the requirement of about 20m 2 The heating requirement of square meters is still insufficient in 3500W in extreme weather of Airy, but 3500W can ensure the daily heating requirement, so that in extreme weather, an auxiliary heat source can be started, the heating quantity is increased, and the heat requirement of indoor personnel is ensured, which is a great advantage of the invention. After oxygen supply and heat supply meet the requirements of human bodies, the influence of the relative humidity of air on the comfort level of the human bodies is considered, the relative humidity of the Tibetan Ali region is about 20%, but the comfort standard of the human bodies is 45% -65%, and the multifunctional humidifying device has the humidifying function, can simultaneously humidify oxygen and air to reach 45% -65%, and can meet the requirements of the human bodies on the humidity. The invention truly realizes heating and simultaneouslyOxygen supply humidification meets the requirements of thermal comfort and breathing comfort of people in high-altitude areas, and ensures the requirements of the old, infants, patients and the like on heat and oxygen.
In summary, the oxygen and heat requirements of the Tibetan Ali building are very high, the oxygen can be supplied while the heat is supplied, the oxygen supply and the heat supply can meet the requirements of thermal comfort and respiratory comfort of a human body, the life health of the human body is ensured, and the oxygen supply and heat supply system has great practical significance and practical application value.
Claims (9)
1. The utility model provides a multistage waste heat recovery heat supply oxygenerator group, its characterized in that includes oxygen generation module, heating module and auxiliary heat source module, wherein:
the oxygen generation module comprises an air compressor, a multistage high-pressure filter, a three-phase heat exchanger, a pressure stabilizing tank, two adsorption towers, an oxygen storage tank and a humidifying bottle; the air compressor is sequentially connected with a high-pressure filter, a three-phase heat exchanger and a pressure stabilizing tank, and a second pressure gauge, a thermometer and a check valve are sequentially arranged on a pipeline between the three-phase heat exchanger and the pressure stabilizing tank; a stop valve and an electromagnetic valve are sequentially arranged on a pipeline between the pressure stabilizing tank and the two parallel adsorption towers, and the two adsorption towers and the silencer are respectively connected after the electromagnetic valve is discharged; a pressure equalizing valve and two throttle valves are sequentially connected in parallel between the two adsorption towers and the oxygen storage tank in parallel; a one-way valve is arranged between the throttle valve and the air storage tank, and a pressure limiting valve and a flowmeter are arranged between the air storage tank and the humidifying bottle;
the heating module is respectively connected with an air compressor, a three-phase heat exchanger and a humidifying bottle in the oxygen generation module; the method specifically comprises the following steps: the heating module comprises an air compressor heat exchanger, a first pressure gauge, a refrigerant compressor, an indoor heat exchanger, a throttle valve, a third valve, a fourth valve and a fifth valve, wherein when the third valve and the fifth valve are closed, the fourth valve is opened, the heating module is of a serial structure, the outlet end of the refrigerant compressor is sequentially connected with the indoor heat exchanger, the throttle valve, the three-phase heat exchanger and the air compressor heat exchanger, and finally the heating module is connected with the inlet end of the refrigerant compressor; when the third valve and the fifth valve are opened, the fourth valve is closed, the heating module is of a parallel structure, the outlet end of the refrigerant compressor is connected with the indoor heat exchanger and the throttle valve, a tee joint behind the throttle valve realizes that the three-phase heat exchanger and the air compressor heat exchanger are connected in parallel, and the refrigerant is collected and then is connected into the inlet end of the refrigerant compressor; the first pressure gauge is arranged between the air compressor heat exchanger and the refrigerant compressor inlet; the air compressor heat exchanger is arranged on the shell of the air compressor; the outlet of the flowmeter is connected with the inlet of the humidifying bottle after being led into the indoor heat exchanger;
the auxiliary heat source module is connected with the muffler, the indoor heat exchanger and the three-phase heat exchanger in the oxygen generating module.
2. The multi-stage waste heat recovery heat supply oxygenerator set of claim 1, wherein the auxiliary heat source module comprises a first valve and a second valve, wherein the first valve is disposed on a conduit between the three-phase heat exchanger and the muffler, the second valve is disposed on a conduit between the indoor heat exchanger and the muffler, and the first valve and the second valve are connected in parallel.
3. The multi-stage waste heat recovery heat supply oxygenerator set according to claim 1, wherein the gas pressure of the high-temperature high-pressure gas in the air compressor is 0.15Mpa-0.5Mpa, and the gas outlet temperature is 20 ℃ to 30 ℃ higher than the ambient temperature.
4. A multi-stage waste heat recovery heat supply oxygen generator set as claimed in any one of claims 1 to 3, wherein the three-phase heat exchanger comprises two groups of heat exchange fins arranged up and down and connected in series, a box body is respectively fixed on the side surface of each group of heat exchange fins, and an axial flow fan is arranged in the box body.
5. The multi-section waste heat recovery heat supply oxygenerator set of claim 4 wherein each set of heat exchange fins uses 2 rows of 10 rows of copper tubes connected longitudinally.
6. The multi-section waste heat recovery heat supply oxygenerator set of claim 5, wherein the diameter of the copper tubes is 10mm, the distance between the tubes is 10mm, the center distance between the upper copper tube and the lower copper tube is 20mm, the distance between the first row of copper tubes and the edges of the heat exchange fins is 10mm, the distance between the first row of copper tubes and the second row of copper tubes is 10mm, and the distance between the second row of copper tubes and the edges of the heat exchange fins is 10mm.
7. The multi-stage waste heat recovery heat supply oxygenerator set of claim 4, wherein each set of heat exchange fins has a width of 200mm and a height of 200mm, the boxes have a width of 200mm x 260mm x 200mm, and the space between the two boxes is 100mm.
8. The multi-stage waste heat recovery heat supply oxygenerator set of claim 4, wherein the air volume of the axial flow fan is 155m 3 /h。
9. A multi-stage waste heat recovery heat supply oxygenerator set as claimed in any one of claims 1 to 3 wherein said adsorption column is a pressure swing adsorption column.
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| CN107940801A (en) * | 2017-10-23 | 2018-04-20 | 浙江大学 | A kind of space division system for recycling compressed air waste-heat |
| JP2019196873A (en) * | 2018-05-10 | 2019-11-14 | Ｊｆｅスチール株式会社 | Recovery method of waste heat of air separation equipment and recovery system of waste heat of air separation equipment |
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