CN114229799A - Positive pressure membrane method oxygen enrichment preparation system - Google Patents
Positive pressure membrane method oxygen enrichment preparation system Download PDFInfo
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 137
- 239000001301 oxygen Substances 0.000 title claims abstract description 137
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 137
- 239000012528 membrane Substances 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 44
- 238000001035 drying Methods 0.000 claims abstract description 42
- 238000000926 separation method Methods 0.000 claims abstract description 38
- 238000003860 storage Methods 0.000 claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 62
- 238000001179 sorption measurement Methods 0.000 claims description 52
- 238000001816 cooling Methods 0.000 claims description 34
- 229910052757 nitrogen Inorganic materials 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000012806 monitoring device Methods 0.000 claims description 6
- 239000003463 adsorbent Substances 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 abstract description 19
- 230000006835 compression Effects 0.000 abstract description 17
- 238000007906 compression Methods 0.000 abstract description 17
- 238000012544 monitoring process Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 11
- 238000004458 analytical method Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000007613 environmental effect Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000007791 dehumidification Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 239000012510 hollow fiber Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0251—Physical processing only by making use of membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
- C01B2210/001—Physical processing by making use of membranes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
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Abstract
The invention discloses an oxygen enrichment preparation system by a positive pressure membrane method, which relates to the technical field of oxygen enrichment preparation systems and comprises a first filter, an oil-free air compressor, a drying device, an air storage tank, a membrane separation assembly and an oxygen enrichment collection device which are sequentially connected; the membrane separation assembly is provided with a first air inlet, a first air outlet and a second air outlet, the air storage tank is communicated with the first air inlet, the first air outlet is communicated with the oxygen enrichment collection device, the first air inlet is provided with an air pressure sensor and an air flow sensor, and the first air outlet is provided with an oxygen enrichment pressure sensor, an oxygen enrichment flow sensor, an oxygen enrichment concentration sensor and a dew point temperature sensor. Compare in traditional malleation embrane method oxygen boosting system of preparing, the problem of oiliness in the finished product gas not only can effectively be solved to this application, has the resistance that reduces whole oxygen boosting system of preparing, and the effect of make full use of compression waste heat and the energy of saving heat, and can realize the monitoring of membrane separation subassembly behavior under different operating mode environment.
Description
Technical Field
The invention relates to the technical field of oxygen enrichment preparation systems, in particular to a positive-pressure membrane oxygen enrichment preparation system.
Background
With the strict popularization of national requirements on energy conservation, emission reduction and carbon reduction, for industrial enterprises in the fields of process industry, sewage treatment and biological fermentation related to the combustion link, oxygen-enriched air with corresponding concentration is produced by using membrane oxygen enrichment and adsorption oxygen enrichment technologies, and the method becomes an important way for enterprises to efficiently produce, cleanly produce and improve core competitiveness. The flow for improving the oxygen concentration by adopting the membrane oxygen enrichment technology has been greatly popularized in the aspects of oxygen enrichment combustion of glass, ceramics and cement kilns and the like, and has also obtained obvious economic, environmental and social benefits for users with relatively small air demand and low requirements for optimizing the oxygen supply concentration.
At present, the membrane oxygen enrichment technology is basically divided into three systems in consideration of the characteristics of membrane modules: a hollow fiber membrane positive pressure oxygen enrichment technology, a spiral membrane negative pressure oxygen enrichment technology and a plate membrane oxygen enrichment technology. Wherein, based on the positive pressure oxygen enrichment technology of the hollow fiber membrane separation component, the oxygen concentration of the produced oxygen-enriched air fluctuates within the range of 30-50 percent; when the oxygen concentration required by a user is in the range, the method is started to use, the corresponding air index is reached 10min after the start, the system can be stopped at any time, the use of the system is not influenced by the stop time, and the method is a relatively applicable choice. As shown in fig. 2, the conventional oxygen-enriched preparation system by positive pressure membrane mainly includes: the device comprises a filter 1, a micro-oil screw compressor 2, a three-stage filter 3, a freeze dryer 4, an air buffer tank 5, a membrane module 6 and a heater 7. In use, compressed air is filtered by the filter 1, flows into the micro-oil screw compressor 2, compressed oil-containing water-containing compressed air is subjected to oil removal and primary water removal by the corresponding three-stage filter 3, water (micro-oil removal) is removed by the cooling dryer 4, the compressed air flows into the air buffer tank 5 (double action, the pressure at the outlet of the air buffer tank 5 is stabilized, the fluctuation caused by the pressure at the inlet side is buffered, water/oil is further removed), then oxygen-enriched air is separated by the membrane module 6 to generate oxygen-enriched air, the generated oxygen-enriched air is subjected to secondary temperature rise by the cooling dryer 4, enters the inlet end of a subsequent pressurizing device and is continuously provided with oxygen-enriched air with corresponding concentration by applying the heater 7. However, the conventional system based on the positive pressure oxygen enrichment technology of the hollow fiber membrane separation module has the following technical defects and shortcomings in practical application:
1) the problem of oil content of compressed air directly influences the service life of a membrane component, the operation and maintenance cost of a system is greatly improved, and meanwhile, the negative effect of oil content exists in finished gas;
2) the micro-oil screw compressor needs to be matched with corresponding multi-stage filters, so that the running resistance of the system is increased, and the resistance of each stage of filter is increased along with the running time in a nonlinear mode; on the other hand, the oil-free system cannot be really ensured;
3) the system has the problem that the compression waste heat of the micro-oil screw machine cannot be utilized automatically, the corresponding compression waste heat of the finished product gas contains oil and is usually radiated to the surrounding environment through air cooling to form thermal pollution, and meanwhile, the energy repeated waste problem of front-end cooling and rear-end secondary heating exists in the whole process;
4) the system can not monitor the operation condition of the membrane component in real time, and is difficult to ensure that the membrane component is in a high-efficiency working state for a long time.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention provides a positive-pressure membrane oxygen enrichment preparation system, which can realize oil-free finished gas, has the effects of reducing system resistance, improving the utilization rate of compression waste heat and saving heat energy, can monitor the operation condition of a membrane separation assembly in real time and ensures that the membrane separation assembly is in a high-efficiency working state for a long time.
2. Technical scheme
In order to solve the problems, the technical scheme provided by the invention is as follows:
a positive-pressure membrane-method oxygen-enriched preparation system comprises a first filter, an oil-free air compressor, a drying device, an air storage tank, a membrane separation assembly and an oxygen-enriched collection device which are sequentially connected; the membrane separation assembly is provided with a first air inlet, a first air outlet and a second air outlet, the air storage tank is communicated with the first air inlet, the first air outlet is communicated with the oxygen enrichment collecting device, an air pressure sensor and an air flow sensor are arranged at the position of the first air inlet, and an oxygen enrichment pressure sensor, an oxygen enrichment flow sensor, an oxygen enrichment concentration sensor and a dew point temperature sensor are arranged at the position of the first air outlet.
In the application, after most of dust is removed through a first filter, air enters an oil-free air compressor to be compressed, then the compressed air enters a drying device to be dehumidified and purified under the action of the oil-free air compressor, then enters an air storage tank to be buffered in pressure, the stability of the subsequent process pressure is ensured, then the compressed air enters a membrane separation assembly through a first air inlet to be separated from oxygen and nitrogen, and the oxygen enters an oxygen enrichment collection device through a first air outlet; and the nitrogen is discharged through a second gas outlet. Compare in traditional malleation embrane method oxygen boosting and prepare the system, this application adopts oil-free air compressor to replace traditional little oily screw compressor, not only can effectively solve the problem of oiliness in the finished product gas, and has avoided needing supporting multistage filter to reduce the problem of oil content, and then has reduced the resistance that system was prepared to whole oxygen boosting. Simultaneously, this application directly gets into drying device through oil-free air compressor's compressed air and dehumidifies and purify and normal atmospheric temperature cooling, rather than cold dry machine, this setting not only can make full use of compression waste heat and heat the drier in the drying device through the compression waste heat, improves the dehumidification effect of drier, and the oxygen that separates through membrane separation subassembly need not because of cold dry machine of process, the temperature is corresponding lower, the rethread sets up heating device and carries out secondary heating process, and then has saved the heat energy once more. In addition, this application is used for monitoring the pressure and the flow that get into membrane separation subassembly compressed air through setting up air pressure sensor and air mass flow sensor and is used for monitoring pressure, flow, concentration and the dew point of first gas outlet oxygen through setting up oxygen-enriched pressure sensor, oxygen-enriched flow sensor, oxygen-enriched concentration sensor and dew point temperature sensor, realizes the monitoring of membrane separation subassembly behavior under different operating mode environment. Therefore, the positive pressure membrane method oxygen enrichment preparation system can not only realize oil-free finished gas, has the effects of reducing system resistance, improving compression waste heat utilization rate and saving heat energy, but also can monitor the operation condition of the membrane separation assembly in real time, and ensures that the membrane separation assembly is in a high-efficiency working state for a long time.
Optionally, the air storage tank is communicated with the first air inlet through a first pipeline, the air pressure sensor and the air flow sensor are arranged on the first pipeline, the first air outlet is communicated with the oxygen enrichment collecting device through a second pipeline, and the oxygen enrichment pressure sensor, the oxygen enrichment flow sensor, the oxygen enrichment concentration sensor and the dew point temperature sensor are all arranged on the second pipeline.
Optionally, the device further comprises a nitrogen-rich collecting device, wherein the nitrogen-rich collecting device is communicated with the second air outlet, and a nitrogen-rich pressure sensor and a nitrogen-rich flow sensor are arranged at the second air outlet.
Optionally, the drying device further comprises a second filter, one end of the second filter is connected with the drying device, and the other end of the second filter is connected with the air storage tank.
Optionally, still include oil free compressor monitoring devices, oil free compressor monitoring devices includes air inlet pressure sensor, air inlet flow sensor, air inlet temperature sensor, air inlet humidity transducer, gas outlet pressure sensor, gas outlet flow sensor, gas outlet temperature sensor and gas outlet humidity transducer.
Optionally, the device further comprises a control system, and the control system is respectively connected with the first filter, the oil-free compressor, the drying device, the air pressure sensor, the air flow sensor, the oxygen-enriched pressure sensor, the oxygen-enriched flow sensor, the oxygen-enriched concentration sensor and the dew point temperature sensor.
Optionally, the drying device includes a first adsorption cylinder, a second adsorption cylinder, a blower, a heating device, a primary cooling system and a secondary cooling system; the air blower, the heating device, the first adsorption cylinder, the second adsorption cylinder, the primary cooling system and the secondary cooling system are all connected through a third pipeline, and dry adsorbents are arranged on the first adsorption cylinder and the second adsorption cylinder.
Optionally, the device further comprises a primary separator and a secondary separator, wherein the primary separator is respectively connected with the primary cooling system, the first adsorption cylinder and the second adsorption cylinder, and the secondary separator is respectively connected with the secondary cooling system, the first adsorption cylinder and the second adsorption cylinder.
Optionally, a plurality of control valves are arranged on the third pipeline.
Optionally, the first adsorption cylinder and the second adsorption cylinder are sequentially provided with a plurality of groups of temperature and humidity sensors from top to bottom, and the temperature and humidity sensors comprise temperature sensors and humidity sensors.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the positive-pressure membrane-method oxygen enrichment preparation system provided by the embodiment of the application has a simple structure, and during operation, air enters an oil-free air compressor for compression after most of dust is removed by a first filter, then the compressed air enters a drying device for dehumidification and purification under the action of the oil-free air compressor, then enters an air storage tank for pressure buffering, the stability of subsequent process pressure is ensured, then enters a membrane separation assembly from a first air inlet for separation of oxygen and nitrogen, and enters an oxygen enrichment collection device from a first air outlet; and the nitrogen is discharged through a second gas outlet. Compare in traditional malleation embrane method oxygen boosting and prepare the system, this application adopts oil-free air compressor to replace traditional little oily screw compressor, not only can effectively solve the problem of oiliness in the finished product gas, and has avoided needing supporting multistage filter to reduce the problem of oil content, and then has reduced the resistance that system was prepared to whole oxygen boosting. Simultaneously, this application directly gets into drying device through oil-free air compressor's compressed air and dehumidifies and purify and normal atmospheric temperature cooling, rather than cold dry machine, this setting not only can make full use of compression waste heat and heat the drier in the drying device through the compression waste heat, improves the dehumidification effect of drier, and the oxygen that separates through membrane separation subassembly need not because of cold dry machine of process, the temperature is corresponding lower, the rethread sets up heating device and carries out secondary heating process, and then has saved the heat energy once more. In addition, this application is used for monitoring the pressure and the flow that get into membrane separation subassembly compressed air through setting up air pressure sensor and air mass flow sensor and is used for monitoring pressure, flow, concentration and the dew point of first gas outlet oxygen through setting up oxygen-enriched pressure sensor, oxygen-enriched flow sensor, oxygen-enriched concentration sensor and dew point temperature sensor, realizes the monitoring of membrane separation subassembly behavior under different operating mode environment. Therefore, the positive pressure membrane method oxygen enrichment preparation system can not only realize oil-free finished gas, has the effects of reducing system resistance, improving compression waste heat utilization rate and saving heat energy, but also can monitor the operation condition of the membrane separation assembly in real time, and ensures that the membrane separation assembly is in a high-efficiency working state for a long time.
(2) The system is prepared to malleation embrane method oxygen boosting that this application embodiment provided is used for the collection of nitrogen gas through setting up rich nitrogen collection device to set up rich nitrogen pressure sensor and rich nitrogen flow sensor and be used for monitoring the flow and the pressure of the nitrogen gas that are come out by the second gas outlet, combine the relevant parameter data of oxygen, can realize the comprehensive monitoring and the analysis to membrane separation subassembly operating conditions under different operating mode environment.
(3) The positive pressure membrane method oxygen enrichment preparation system provided by the embodiment of the application can further realize the purification of compressed air by arranging the second filter.
(4) The positive pressure membrane method oxygen enrichment preparation system provided by the embodiment of the application can monitor and collect data of various influence factor parameters of pressure, flow, temperature and humidity of air at an air inlet and an air outlet in an oil-free compressor by arranging the air inlet pressure sensor, the air inlet flow sensor, the air inlet temperature sensor, the air inlet humidity sensor, the air outlet pressure sensor, the air outlet flow sensor, the air outlet temperature sensor and the air outlet humidity sensor, then analyzes the data of the collected various influence factor parameters according to the content disclosed by the analysis method of absolute energy efficiency and relative energy efficiency of a CN201910111932.6 compressed air system, corrects the influence on the absolute energy efficiency of the oil-free compressor according to the monitoring result of each influence factor, obtains the absolute energy efficiency data of the compressor in a corresponding state, and obtains the absolute energy efficiency data of the compressor in the corresponding state by absolute energy efficiency analysis under the corresponding state condition, based on the corresponding chart form, the actual unit consumption and the change rule of the given compressor under different production and environmental working conditions can be visually analyzed. According to the method, the absolute energy efficiency analysis under the corresponding state condition is carried out, based on the corresponding chart form, the actual unit consumption and the change rule of the compressor are given under different production and environment working conditions, the operating absolute energy efficiency is compared with the corresponding design absolute energy efficiency through the concept of relative energy efficiency analysis, the relative state of equipment is reflected visually, the visual analysis of the absolute energy efficiency and the relative energy efficiency of the oil-free compressor under different environment working conditions and production load conditions is realized, and further the digital management and control of the oil-free compressor are realized.
(5) Compared with the traditional drying device, the drying device in the embodiment has low energy consumption, can fully utilize the compression waste heat and the environmental cooling capacity, can realize multi-level dew point control (from normal pressure to 20 ℃ to pressure to 40 ℃), and ensures long-term work of the drying agent through a zero-gas-consumption waste heat adsorption drying mode, a zero-gas-consumption air blowing mode and a zero-gas-consumption waste heat air blowing integrated drying mode; under the conditions of variable environmental conditions and production load strength, the stability of the quality of the finished gas can be efficiently ensured.
Drawings
Fig. 1 is a schematic flow structure diagram of an oxygen-enriched preparation system by a positive pressure membrane method according to an embodiment of the present invention.
Fig. 2 is a schematic flow structure diagram of a conventional positive pressure membrane oxygen enrichment production system.
Fig. 3 is a schematic flow structure diagram of a membrane separation module according to an embodiment of the present invention.
Fig. 4 is a schematic view of a flow structure of a drying apparatus according to an embodiment of the present invention.
Detailed Description
For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The terms first, second, and the like in the present invention are provided for convenience of describing the technical solution of the present invention, and have no specific limiting effect, but are all generic terms, and do not limit the technical solution of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
With reference to fig. 1-3, the present embodiment provides a positive pressure membrane oxygen-enriched preparation system, which comprises a first filter 8, an oil-free air compressor 9, a drying device 10, a gas storage tank 12, a membrane separation assembly 13 and an oxygen-enriched collection device (not shown in the figure) connected in sequence;
the membrane separation assembly 13 is provided with a first air inlet 22, a first air outlet 23 and a second air outlet 24, the air storage tank 12 is communicated with the first air inlet 22, the first air outlet 23 is communicated with the oxygen-enriched collection device, a first pressure sensor 14 and a first flow sensor 15 are arranged at the first air inlet 22, and an oxygen-enriched pressure sensor 18, an oxygen-enriched flow sensor 19, an oxygen-enriched concentration sensor 20 and a dew point temperature sensor 21 are arranged at the first air outlet 23.
As shown in fig. 1, in operation, after most of dust is removed by the first filter 8, the air enters the oil-free air compressor 9 for compression, then the compressed air enters the drying device 10 for dehumidification and purification under the action of the oil-free air compressor 9, then enters the air storage tank 12 for pressure buffering to ensure the stability of the subsequent process pressure, and then enters the membrane separation assembly 13 from the first air inlet 22 for separation of oxygen and nitrogen, and the oxygen enters the oxygen enrichment collection device (not shown) from the first air outlet 23; while nitrogen is vented through a second vent 24. Compare in traditional malleation embrane method oxygen boosting and prepare the system, this application adopts oil-free air compressor 9 to replace traditional little oily screw compressor, not only can effectively solve the oily problem in the finished product gas, and has avoided needing supporting multistage filter to reduce the problem of oil content, and then has reduced the resistance that system was prepared to whole oxygen boosting. Simultaneously, this application directly gets into drying device 10 through oil-free air compressor 9's compressed air and dehumidifies and purify and normal atmospheric temperature cooling, rather than cold machine of doing, this setting not only can make full use of compression waste heat and heat the drier in drying device 10 through the compression waste heat, improve the dehumidification effect of drier, and the oxygen that separates through membrane separation subassembly 13 need not to lead to the temperature corresponding lower because of cold machine of doing, the rethread sets up the processing that heating device 31 carries out the secondary intensification, and then saved the heat energy once more. In addition, the present application realizes the monitoring of the operation condition of the membrane separation assembly 13 under different working conditions by providing the first pressure sensor 14 and the first flow sensor 15 for monitoring the pressure and flow rate of the compressed air entering the membrane separation assembly 13 and by providing the oxygen-rich pressure sensor 18, the oxygen-rich flow sensor 19, the oxygen-rich concentration sensor 20 and the dew point temperature sensor 21 for monitoring the pressure, flow rate, concentration and dew point of the oxygen at the first air outlet 23. Therefore, the positive pressure membrane method oxygen enrichment preparation system can not only realize oil-free finished gas, has the effects of reducing system resistance, improving compression waste heat utilization rate and saving heat energy, but also can monitor the operation condition of the membrane separation assembly in real time, and ensures that the membrane separation assembly is in a high-efficiency working state for a long time.
In practical application, the oil-free compressor is a centrifuge or an oil-free screw compressor.
Example 2
With reference to fig. 1 and fig. 3, in the oxygen-enriched preparation system by positive pressure membrane method according to this embodiment, compared with the technical solution of embodiment 1, the gas storage tank 12 is communicated with the first gas inlet 22 through a first pipeline 25, the first pressure sensor 14 and the first flow sensor 15 are disposed on the first pipeline 25, the first gas outlet 23 is communicated with the oxygen-enriched collection device through a second pipeline 26, and the oxygen-enriched pressure sensor 18, the oxygen-enriched flow sensor 19, the oxygen-enriched concentration sensor 20 and the dew point temperature sensor 21 are disposed on the second pipeline 26. The gas discharged from the gas storage tank 12 enters the membrane separation assembly 13 through a first pipeline 25 from a first gas inlet 22 to separate oxygen from nitrogen, and the oxygen enters the oxygen enrichment collection device through a first gas outlet 23 through a second pipeline 26.
In practice, a vacuum pump (not shown) is also included, and is disposed on the second pipe 26. The vacuum pump is used for pumping out the oxygen-enriched gas separated in the membrane separation assembly 13.
Example 3
Compared with the technical scheme of the embodiment 1 or 2, the oxygen-enriched preparation system by the positive pressure membrane method further comprises a nitrogen-enriched collecting device (not shown in the figure), wherein the nitrogen-enriched collecting device is communicated with the second air outlet 24, and a nitrogen-enriched pressure sensor and a nitrogen-enriched flow sensor are arranged at the second air outlet 24. The nitrogen-rich collecting device is communicated with the second air outlet 24 through a fourth pipeline 27, the nitrogen-rich pressure sensor and the nitrogen-rich flow sensor are arranged on the fourth pipeline 27, the nitrogen-rich collecting device (not shown in the figure) is arranged for collecting nitrogen, the nitrogen-rich pressure sensor and the nitrogen-rich flow sensor are arranged on the fourth pipeline 27 and are used for monitoring the flow and the pressure of the nitrogen from the second air outlet 24, and the comprehensive monitoring and analysis of the running condition of the membrane separation assembly 13 under different working condition environments can be realized by combining with the relevant parameter data of oxygen.
Example 4
With reference to fig. 1, compared with the technical solution of embodiment 1, the oxygen-enriched preparation system by positive pressure membrane method of this embodiment further includes a second filter 11, one end of the second filter 11 is connected to the drying device 10, and the other end of the second filter 11 is connected to the gas storage tank 12. The purification of the compressed air can be further achieved by providing a second filter 11.
In practice, a gas-liquid separator (not shown) is further included, and the gas-liquid separator is arranged between the second filter 11 and the drying device 10, and the arrangement is convenient for further improving the purification of the compressed air.
Example 5
The system is prepared to malleation embrane method oxygen boosting of this embodiment compares with embodiment 1's technical scheme, still includes oil free compressor monitoring devices (not shown in the figure), oil free compressor monitoring devices includes air inlet pressure sensor, air inlet flow sensor, air inlet temperature sensor, air inlet humidity transducer, gas outlet pressure sensor, gas outlet flow sensor, gas outlet temperature sensor and gas outlet humidity transducer. By arranging the air inlet pressure sensor, the air inlet flow sensor, the air inlet temperature sensor, the air inlet humidity sensor, the air outlet pressure sensor, the air outlet flow sensor, the air outlet temperature sensor and the air outlet humidity sensor, the data of each influence factor parameter of the pressure, the flow, the temperature and the humidity of air at the air inlet and the air outlet in the oil-free compressor can be monitored and collected, then the data collected by each influence factor parameter is analyzed according to the content disclosed by the analysis method of the absolute energy efficiency and the relative energy efficiency of the CN201910111932.6 compressed air system, the influence on the absolute energy efficiency of the oil-free compressor is corrected according to the monitoring result of each influence factor, the absolute energy efficiency data of the compressor in a corresponding state is obtained, and the absolute energy efficiency analysis under the corresponding state condition can be visually analyzed based on the corresponding chart form under different production and environmental working conditions, the actual unit consumption of the compressor and the change rule thereof are given. According to the method, the absolute energy efficiency analysis under the corresponding state condition is carried out, based on the corresponding chart form, the actual unit consumption and the change rule of the compressor are given under different production and environment working conditions, the operating absolute energy efficiency is compared with the corresponding design absolute energy efficiency through the concept of relative energy efficiency analysis, the relative state of equipment is reflected visually, the visual analysis of the absolute energy efficiency and the relative energy efficiency of the oil-free compressor under different environment working conditions and production load conditions is realized, and further the digital management and control of the oil-free compressor are realized.
Example 6
Compared with the technical solution of embodiment 1, the oxygen-enriched preparation system by positive pressure membrane method of this embodiment further includes a control system (not shown in the figure), and the control system is respectively connected to the first filter 8, the oil-free compressor, the drying device 10, the first pressure sensor 14, the first flow sensor 15, the oxygen-enriched pressure sensor 18, the oxygen-enriched flow sensor 19, the oxygen-enriched concentration sensor 20, and the dew point temperature sensor 21. The control system is used for controlling and regulating the running state of each device.
Example 7
With reference to fig. 4, in the oxygen-enriched preparation system by positive pressure membrane method of this embodiment, compared with the technical solution of embodiment 1, the drying device 10 includes a first adsorption cylinder 28, a second adsorption cylinder 29, a blower 30, a heating device 31, a primary cooling system 32, and a secondary cooling system 33; the blower 30, the heating device 31, the first adsorption cylinder 28, the second adsorption cylinder 29, the primary cooling system 32 and the secondary cooling system 33 are all connected through a third pipeline, and dry adsorbents are arranged on the first adsorption cylinder 28 and the second adsorption cylinder 29.
As shown in fig. 4, in practical use, the first adsorption cylinder 28 is connected to the second adsorption cylinder 29, the blower 30 is connected to the heating device 31, the heating device 31 is connected to the first adsorption cylinder 28, and the primary cooling system 32 and the secondary cooling system 33 are both connected to the first adsorption cylinder 28 and the second adsorption cylinder 29; the drying device 10 is provided with a compressed air inlet 34 and a compressed air outlet 35, the compressed air inlet 34 is respectively connected with the first adsorption cylinder 28 and the second adsorption cylinder 29, and the compressed air outlet 35 is respectively connected with the air storage tank 12, the first adsorption cylinder 28 and the second adsorption cylinder 29; compressed air inlet 34 and compressed air gas outlet 35 department all are equipped with second pressure sensor, and this setting can real-time supervision and feedback compressed air inlet 34 and compressed air gas outlet 35's air pressure value, according to the control of the compressed air dew point in its numerical value drying device 10 of pressure for drying device 10 can realize the long-term high-efficient operation under different work condition. Wherein, the first-stage cooling system 32 and the second-stage cooling system 33 both comprise a normal temperature cooler and a freezing cooler. The normal temperature cooler has the main function of fully utilizing the cooling capacity of circulating water, and can separate moisture in air as much as possible, and the point can be matched with the environment, such as seasonal change, the winter necessarily has good cooling conditions, or the temperature of cooling water in winter in the north can achieve the effect of freezing and dehumidifying, thereby reducing the energy consumption in the freezing and cooling process.
Compared with the traditional drying device, the drying device 10 in the embodiment has low energy consumption, can fully utilize the compression waste heat and the environmental cooling capacity, can realize multi-level dew point control (from normal pressure to 20 ℃ below zero to 40 ℃ below zero), and ensures that the drying agent works for a long time through a zero-gas-consumption waste heat adsorption drying mode, a zero-gas-consumption blowing mode and a zero-gas-consumption waste heat blowing integrated drying mode; under the conditions of variable environmental conditions and production load strength, the stability of the quality of the finished gas can be efficiently ensured.
Please refer to the record in the low energy consumption general multi-mode smart adsorption drying method for compressed air preparation in CN201910399803.1 for the specific working principle of the drying device in the present application, and the detailed description thereof is omitted here.
Example 8
With reference to fig. 4, compared with the technical solution of example 7, the oxygen-enriched preparation system by positive pressure membrane method of this embodiment further includes a primary separator 36 and a secondary separator 37, where the primary separator 36 is respectively connected to the primary cooling system 32, the first adsorption cylinder 28 and the adsorption cylinder 29, and the secondary separator 37 is respectively connected to the secondary cooling system 33, the first adsorption cylinder 28 and the adsorption cylinder 29. By providing the first separator 36 and the second separator 37, the compressed air can be further purified, thereby improving the purity of oxygen.
Example 9
With reference to fig. 4, in the oxygen-enriched preparation system by the positive pressure membrane method according to this embodiment, compared with the technical solution of embodiment 7, a plurality of control valves are disposed on the third pipeline. The control valve is arranged, so that the flow of the air on the third pipeline can be regulated and controlled, the specific flow of the air entering the drying device 10 in each part of the drying device 10 can be regulated and controlled, and the action sequence among all the devices in the drying device can be implemented according to the low-energy consumption universal multi-mode intelligent adsorption drying method for preparing the compressed air by CN 201910399803.1.
Example 10
Compared with the technical scheme of embodiment 7, the system for preparing oxygen-enriched air by using positive pressure membrane method of this embodiment is characterized in that the first adsorption cylinder 28 and the second adsorption cylinder 29 are sequentially provided with a plurality of groups of temperature and humidity sensors (not shown in the figure) from top to bottom, and the temperature and humidity sensors include temperature sensors and humidity sensors. By arranging a plurality of groups of temperature and humidity sensors, the data of the humidity and temperature parameters of the first adsorption cylinder 28 and the second adsorption cylinder 29 at different height positions can be obtained, and the temperature and the humidity of the dry adsorbent at different heights can be monitored. In practical application, the temperature sensors and the humidity sensors in the same group are arranged at intervals, and the arrangement positions are located on the same horizontal line. This setting can avoid single sensor to damage, the unable problem of transmitting of data, and on the other hand can judge the even condition of drier regeneration degree on same height through the distribution value of temperature humidity again.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (10)
1. A positive-pressure membrane-method oxygen-enriched preparation system is characterized by comprising a first filter, an oil-free air compressor, a drying device, an air storage tank, a membrane separation assembly and an oxygen-enriched collection device which are sequentially connected;
the membrane separation assembly is provided with a first air inlet, a first air outlet and a second air outlet, the air storage tank is communicated with the first air inlet, the first air outlet is communicated with the oxygen enrichment collecting device, an air pressure sensor and an air flow sensor are arranged at the position of the first air inlet, and an oxygen enrichment pressure sensor, an oxygen enrichment flow sensor, an oxygen enrichment concentration sensor and a dew point temperature sensor are arranged at the position of the first air outlet.
2. An oxygen-enriched preparation system according to claim 1, wherein said air storage tank is connected to said first air inlet through a first pipe, said air pressure sensor and said air flow sensor are provided on said first pipe, said first air outlet is connected to said oxygen-enriched collection device through a second pipe, and said oxygen-enriched pressure sensor, said oxygen-enriched flow sensor, said oxygen-enriched concentration sensor and said dew-point temperature sensor are provided on said second pipe.
3. The system for preparing oxygen-enriched gas by using the positive-pressure membrane method as claimed in claim 1 or 2, further comprising a nitrogen-enriched collecting device, wherein the nitrogen-enriched collecting device is communicated with the second gas outlet, and a nitrogen-enriched pressure sensor and a nitrogen-enriched flow sensor are arranged at the second gas outlet.
4. An oxygen-enriched preparation system by positive pressure membrane method according to claim 1, further comprising a second filter, one end of said second filter being connected to said drying device, and the other end of said second filter being connected to said gas storage tank.
5. The system for preparing oxygen-enriched gas by using the positive pressure membrane method as claimed in claim 1, further comprising an oil-free compressor monitoring device, wherein the oil-free compressor monitoring device comprises an air inlet pressure sensor, an air inlet flow sensor, an air inlet temperature sensor, an air inlet humidity sensor, an air outlet pressure sensor, an air outlet flow sensor, an air outlet temperature sensor and an air outlet humidity sensor.
6. The system for preparing oxygen-enriched gas by using positive-pressure membrane method as claimed in claim 1, further comprising a control system, wherein the control system is respectively connected with the first filter, the oil-free compressor, the drying device, the air pressure sensor, the air flow sensor, the oxygen-enriched pressure sensor, the oxygen-enriched flow sensor, the oxygen-enriched concentration sensor and the dew-point temperature sensor.
7. The oxygen-enriched preparation system by the positive-pressure membrane method as claimed in claim 1, wherein the drying device comprises a first adsorption cylinder, a second adsorption cylinder, a blower, a heating device, a primary cooling system and a secondary cooling system; the air blower, the heating device, the first adsorption cylinder, the second adsorption cylinder, the primary cooling system and the secondary cooling system are all connected through a third pipeline, and dry adsorbents are arranged on the first adsorption cylinder and the second adsorption cylinder.
8. An oxygen-enriched preparation system by positive pressure membrane method according to claim 7, further comprising a primary separator and a secondary separator, wherein the primary separator is connected to the primary cooling system, the first adsorption cylinder and the second adsorption cylinder, respectively, and the secondary separator is connected to the secondary cooling system, the first adsorption cylinder and the second adsorption cylinder, respectively.
9. An oxygen-enriched preparation system by positive pressure membrane method according to claim 7, wherein a plurality of control valves are provided on the third pipeline.
10. The system of preparing oxygen-enriched gas by a positive-pressure membrane method according to claim 7, wherein the first adsorption cylinder and the second adsorption cylinder are sequentially provided with a plurality of groups of temperature and humidity sensors from top to bottom, and the temperature and humidity sensors include a temperature sensor and a humidity sensor.
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| JP2002326807A (en) * | 2001-05-07 | 2002-11-12 | Nishishiba Electric Co Ltd | Generator of nitrogen and oxygen |
| US20110296987A1 (en) * | 2010-06-01 | 2011-12-08 | Shell Oil Company | Separation of oxygen containing gases |
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