CN108083240A - A kind of system and method for nitrogen deoxidation of being come into being using public energy source combustion gas for nitrogen making machine - Google Patents
A kind of system and method for nitrogen deoxidation of being come into being using public energy source combustion gas for nitrogen making machine Download PDFInfo
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- CN108083240A CN108083240A CN201810059429.6A CN201810059429A CN108083240A CN 108083240 A CN108083240 A CN 108083240A CN 201810059429 A CN201810059429 A CN 201810059429A CN 108083240 A CN108083240 A CN 108083240A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 308
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 153
- 239000000567 combustion gas Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 39
- 230000003197 catalytic effect Effects 0.000 claims abstract description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 20
- 239000003345 natural gas Substances 0.000 claims abstract description 18
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 39
- 239000002808 molecular sieve Substances 0.000 claims description 19
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 19
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 18
- 239000003054 catalyst Substances 0.000 claims description 17
- 230000008929 regeneration Effects 0.000 claims description 17
- 238000011069 regeneration method Methods 0.000 claims description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- 229910052697 platinum Inorganic materials 0.000 claims description 9
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 8
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 238000006392 deoxygenation reaction Methods 0.000 claims description 7
- 239000004480 active ingredient Substances 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 206010013786 Dry skin Diseases 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007791 dehumidification Methods 0.000 claims description 3
- 238000003795 desorption Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 8
- 229910021529 ammonia Inorganic materials 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 229960004424 carbon dioxide Drugs 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000007726 management method Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229940123973 Oxygen scavenger Drugs 0.000 description 1
- 238000005915 ammonolysis reaction Methods 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- PCLURTMBFDTLSK-UHFFFAOYSA-N nickel platinum Chemical compound [Ni].[Pt] PCLURTMBFDTLSK-UHFFFAOYSA-N 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
- C01B21/0405—Purification or separation processes
-
- 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
- C01B2210/0003—Chemical processing
- C01B2210/0004—Chemical processing by oxidation
-
- 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
- C01B2210/0014—Physical processing by adsorption in solids
- C01B2210/0015—Physical processing by adsorption in solids characterised by the adsorbent
- C01B2210/0018—Zeolites
-
- 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
- C01B2210/0014—Physical processing by adsorption in solids
- C01B2210/0015—Physical processing by adsorption in solids characterised by the adsorbent
- C01B2210/002—Other molecular sieve materials
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
Abstract
The present invention discloses a kind of system and method for nitrogen deoxidation of coming into being using public energy source combustion gas for nitrogen making machine；The system includes energy-saving heat exchanger, heater, catalytic bed, cooler and nitrogen drier；Wherein, the upstream of the energy-saving heat exchanger is provided with nascent nitrogen intake line；It is connected successively with heater, catalytic bed, energy-saving heat exchanger itself, cooler and nitrogen drier by pipeline downstream, and high pure nitrogen is exported in the delivery outlet of nitrogen drier；Natural gas input channel is additionally provided on pipeline between the heater and catalytic bed；To input the public energy source combustion gas of equivalents ratio identical with the oxygen-containing equivalent in nascent nitrogen.The system does not introduce the dangerous material such as other hydrogen, ammonia in addition to public energy source combustion gas, safe；And environmental protection, operating cost are low, easy to use；With good industrial applications prospect.
Description
Technical field
The present invention relates to come into being nitrogen deoxy technology field for nitrogen making machine, and in particular to the use of public energy source combustion gas is nitrogen processed
Machine is come into being the method for nitrogen deoxidation.
Background technology
The nitrogen technology processed generally used in the world at present mainly has cryogenic air separation unit nitrogen, molecular sieve air separation by PSA system
The three big technology such as nitrogen, film nitrogen production by air separation, wherein the cryogenic air separation unit equipment of making nitrogen are complicated, take up a large area, and capital cost is higher, equipment
One-time investment is more, and operating cost is higher, is suitable for large-scale industry nitrogen, and in, small-scale nitrogen processed just seem very uneconomical,
And molecular sieve air separation by PSA nitrogen and film nitrogen production by air separation have more wide market, especially molecular sieve pressure-variable adsorption sky
Divide nitrogen technology use processed more extensive.
But molecular sieve air separation by PSA nitrogen and film nitrogen production by air separation technology all there are one it is common the characteristics of, be exactly just
The purity of raw nitrogen is not high, and generally in 500ppm~10000ppm, higher nitrogen gas purity will consume more oxygen content
Compression is taken offence, and energy consumption also can be larger.If desired the nitrogen of higher purity also needs to further chemical deoxidization.
The chemical deoxidization being commonly used mainly has deoxidization by adding hydrogen mode and carbon deoxidation mode.
Hydrogen used in deoxidization by adding hydrogen mode is mainly derived from outsourcing hydrogen gas cylinder, ammonolysis craft hydrogen and alcohol and decomposes hydrogen
Gas is all the inflammable, explosive, poisonous dangerous material used in any way, has insecurity in transport, storage, use,
Inconvenience is brought to the production safety management of factory.
Carbon deoxidation mode then needs regularly to replace it and carbon in carbon carrier catalyst, operation is gradually used up by oxygen
Cost is higher, and there is also inconvenient.
China is at present proposed the links such as production safety, energy-saving and environmental protection higher requirement, and has put into effect many
Corresponding laws and regulations and management method strictly control；And most of factories are all using natural gas as the energy, to natural gas
With perfect administrative mechanism, there is no the problems such as the transport of additional dangerous material, storage, management, and natural gas is easy to continuous
Stable control；For above-mentioned correlative technology field current situation and existing state basic policy, the present invention proposes a kind of public energy of use
Source combustion gas for nitrogen making machine come into being nitrogen deoxidation device and its application method.
The content of the invention
The present invention is used for the deoxygenation of the nascent nitrogen of molecular sieve pressure swing adsorption air nitrogen-making device and film Nitrogen plant using air separation process,
Especially with natural gas or the nitrogen-making device of other public energy source combustion gas (such as coal gas, liquefied gas, oil gas) factory；It is nascent
Nitrogen oxygen concentration highest 10000ppm, after purification smart oxygen-containing ＜ 5ppm of nitrogen.It is of the present invention to be using public energy source combustion gas
Nitrogen making machine is come into being the system of nitrogen deoxidation, which includes energy-saving heat exchanger, heater, catalytic bed, cooler and nitrogen drying
Device；Wherein, the upstream of the energy-saving heat exchanger is provided with nascent nitrogen intake line；Downstream by pipeline successively with heating
Device, catalytic bed, energy-saving heat exchanger itself, cooler are connected with nitrogen drier, and export height in the delivery outlet of nitrogen drier
Pure nitrogen gas；
Natural gas input channel is additionally provided on pipeline between the heater and catalytic bed；To input and come into being
The public energy source combustion gas of the identical equivalents ratio of oxygen-containing equivalent in nitrogen.The public energy source combustion specifically selected in the embodiment of the present invention
Gas is natural gas.
In the case of preferred, it is for what nitrogen making machine came into being nitrogen deoxidation using public energy source combustion gas for described above
System, the pipeline for being respectively arranged at energy-saving heat exchanger upstream and downstream are also connected by temperature control bypass conduit.
In the case of preferred, it is for what nitrogen making machine came into being nitrogen deoxidation using public energy source combustion gas for described above
It unites, gas flow controller is additionally provided in the temperature control bypass conduit.
In the case of preferred, it is for what nitrogen making machine came into being nitrogen deoxidation using public energy source combustion gas for described above
It unites, on the pipeline between the energy-saving heat exchanger and cooler, is additionally provided with the regeneration bypass channel time for flowing through nitrogen drier
Road.
In the case of preferred, it is for what nitrogen making machine came into being nitrogen deoxidation using public energy source combustion gas for described above
System, the regeneration bypass channel circuit includes：By the passage of the heat source gas of energy-saving heat exchanger output；And it flows through nitrogen and does
The gas recovery approach of temperature is reduced after dry device.
In the case of preferred, it is for what nitrogen making machine came into being nitrogen deoxidation using public energy source combustion gas for described above
System, the catalytic bed are fixed catalytic bed, and used active ingredient is containing metal platinum or platinum, the particle of palladium mixture
Shape catalyst.
In the case of preferred, it is for what nitrogen making machine came into being nitrogen deoxidation using public energy source combustion gas for described above
System, the catalytic bed be double-seal head barrel-type structure, gas upper entering and lower leaving；There is supporting screening plate among cylinder, it is granular to urge
Agent is laid on supporting screening plate, under normal circumstances the generally nascent nitrogen flow (Nm of the usage amount of the catalyst3/ h)
5000-1~10000-1Times.
In the case of preferred, it is for what nitrogen making machine came into being nitrogen deoxidation using public energy source combustion gas for described above
System, the nitrogen drier are the hollow tube-shape of about two end openings, and drier is interior to be equipped with sieve particle；Two dryings
The working method of device does adsorption and dehumidification for one, another does desorption and regeneration, periodically mutually switching.
In the case of preferred, it is for what nitrogen making machine came into being nitrogen deoxidation using public energy source combustion gas for described above
System, the molecular sieve filled in the nitrogen drier be have the function of water removal and removing carbon dioxide 5A types molecular sieve or
13X types molecular sieve and other satisfactory molecular sieves.
Another aspect of the present invention, is to disclose a kind of using system described above, the use of public energy source combustion gas is system
Nitrogen machine is come into being the method for nitrogen deoxidation, is comprised the following steps：40 DEG C come from molecular sieve swing adsorption nitrogen producing apparatus it is nascent
Nitrogen, oxygen content are 500~10000ppm, and part nitrogen is warming up to 250~350 DEG C by energy-saving heat exchanger heat exchange, another
Part nitrogen is from temperature control bypass conduit around with last point of gas mixing, being arranged on by control by temperature control after energy-saving heat exchanger
Gas flow controller on the pipeline of road, the flow control to the part nitrogen so that mixed temperature is no more than 310 DEG C,
Then gas enters heater and is heated to 310~350 DEG C；Nitrogen after being heated via heater is according to oxygen-containing in nascent nitrogen
Equivalent injects the public energy source combustion gas of identical equivalents ratio, and mixed gas enters back into fixed catalytic bed and carries out deoxygenation, and
Release amount of heat；About 350~400 DEG C of gas is again introduced into energy-saving heat exchanger heat exchange and is cooled to 180 DEG C with next time after reaction
After receiving most of heat, part hot gas is through regenerating bypass channel circuit as the regeneration heat source of nitrogen drier further using remaining
Cooler cooling is directly entered by energy-saving heat exchanger and is water-cooled to less than 40 DEG C into cooler, another part gas after heat,
Subsequently into moisture and carbon dioxide that the elimination reaction of nitrogen drier generates, the high-purity nitrogen that oxygen content is less than 5ppm is obtained
Gas.
Data as shown in the embodiment of the present invention, be when the public energy source combustion gas specifically selected be natural gas when technique
Citing, is a parameter point of operating procedure data, and practical operation scope will will also have according to oxygen containing different, combustion gas differences
It is many different.
The characteristics of technical solution of the present invention, is：The combustion of the public energy sources such as natural gas, the coal gas a. stablized using combustion heat value
Gas is as oxygen scavenger；B. using fixed catalytic bed, catalyst is made with metal platinum or platinum, palladium mixture.C. deoxygenation
Temperature is at 250 DEG C~350 DEG C；D. come into being nitrogen oxygen concentration highest 10000ppm, after purification the oxygen-containing ＜ 5ppm of smart nitrogen.E. this hair
The bright deoxygenation for molecular sieve air separation by PSA nitrogen-making device and the nascent nitrogen of film Nitrogen plant using air separation process.
Advantageous effect：
A. safety；The device does not introduce the dangerous material such as other hydrogen, ammonia in addition to public energy source combustion gas；It is and public
Main energy sources of the energy combustion gas as factory altogether have perfect safety measure.
B. it is environmentally friendly；Catalytic deoxidation reaction product is water and carbon dioxide, can be just directly discharged to after being removed from nitrogen
Air will not cause the pollution of air；Catalyst life is longer, need not replace substantially, there is no solid-state castoffs.
C. operating cost is low；The present invention uses " public energy source combustion gas ", especially with " natural gas ", is carried with hydrogen, carbon
Body catalyst and the liquefied ammonia of hydrogen manufacturing etc. are compared, and the consumption costs for removing unit volume oxygen is minimum, production management expense
With being also minimum.
D. it is easy to use；Compared with traditional deaerating plant, entire technological process is carried there is no hydrogen cylinder, ammonia bottle or carbon is replaced
The processes such as catalyst, especially public energy source combustion gas, natural gas can be directly connected to device with pipeline, by automatic valve into
The control of row continuous-stable.
Description of the drawings
Fig. 1 is come into being the flow chart of nitrogen deoxidation using natural gas for nitrogen making machine；
1. energy-saving heat exchanger, 2. heaters, 3. catalytic beds, 4. coolers, 5. nitrogen driers；These structural units are
Universal architecture.
Specific embodiment
Following nonlimiting examples can make those of ordinary skill in the art be more fully understood the present invention, but not with
Any mode limits the present invention.
Energy-saving heat exchanger 1, heater 2, catalytic bed 3, cooler 4, nitrogen drier 5 described in embodiment；These knots
Structure unit is universal architecture.
Embodiment 1
According to the flow chart of Fig. 1, the device and system that natural gas is used to come into being nitrogen deoxidation for nitrogen making machine are described in detail；
The system of the nitrogen deoxidation of being come into being using public energy source combustion gas for nitrogen making machine, including energy-saving heat exchanger 1, heating
Device 2, catalytic bed 3, cooler 4 and nitrogen drier 5；Wherein, the upstream of the energy-saving heat exchanger 1 is provided with nascent nitrogen tube
Road；Downstream by pipeline successively with heater 2, catalytic bed 3,5 phase of energy-saving heat exchanger 1 itself, cooler 4 and nitrogen drier
Even, and in the delivery outlet of nitrogen drier 5 high pure nitrogen is exported；
Natural gas input channel is additionally provided on pipeline between the heater 2 and catalytic bed 3；To with nascent nitrogen
The natural gas of the identical equivalents ratio of oxygen-containing equivalent in gas.
The pipeline of 1 upstream and downstream of energy-saving heat exchanger is respectively arranged at, is connected by temperature control bypass conduit；The control
Gas flow controller is additionally provided in warm bypass conduit.
On pipeline between the energy-saving heat exchanger 1 and cooler 4, it is additionally provided with by the regeneration for flowing through nitrogen drier 5
Paths circuit.The hot gas exported by energy-saving heat exchanger 1, a portion can be used as nitrogen drying by regenerating bypass channel
Using being returned after waste heat, the gas of cooler 4 is directly further delivered to another part through energy-saving heat exchanger 1 for the regeneration heat source of device
Enter cooler 4 after body mixing.
The regeneration bypass channel circuit includes：By the passage of the heat source gas of energy-saving heat exchanger output；And it flows through
The gas recovery approach of temperature is reduced after nitrogen drier.
Embodiment 2
According to the flow chart of Fig. 1, the technological process that natural gas is used to come into being nitrogen deoxidation for nitrogen making machine is described in detail：From point
40 DEG C of nascent nitrogen of son sieve swing adsorption nitrogen producing apparatus, oxygen content 5000ppm, part nitrogen pass through energy saving heat exchange
300 DEG C or more of the heat exchange of device 1 heating, another part nitrogen are mixed from temperature control bypass around after energy-saving heat exchanger 1 with last point of gas
It closes, is no more than 310 DEG C by the mixed temperature of flow control for controlling the part nitrogen, 320 are heated into heater 2
℃.The oxygen content of nascent nitrogen is higher, and exothermic heat of reaction is more, can be higher in the outlet temperature of energy-saving heat exchanger 1, by temperature control
The flow on road just needs accordingly to improve, in case the temperature into heater 2 is more than setting value, via the nitrogen after the heating of heater 2
Gas injects the natural gas of identical equivalents ratio according to the oxygen-containing equivalent in nascent nitrogen, and mixed gas enters back into fixed catalytic bed
3 carry out deoxygenation；Catalytic bed 3 uses the fixation of the pellet type catalyst containing the active ingredients such as metal platinum or platinum, palladium mixture
Formula catalytic bed 3, catalyst surface carry out deoxygenation reaction equation be：
2O2+CH4=CO2+2H2O+ heats
Oxygen molecule carries out redox reaction with methane molecule on the surface of catalyst, and releases amount of heat；After reaction
About 390 DEG C of gas is again introduced into the heat exchange of energy-saving heat exchanger 1 and is cooled to less than 150 DEG C, after recycling most of heat, part hot gas
Enter cooler 4 after regeneration bypass further utilizes waste heat as the regeneration heat source of nitrogen drier 5, another part gas is straight
It taps into and is water-cooled to less than 40 DEG C into the cooling of cooler 4, the moisture and two generated subsequently into 5 elimination reaction of nitrogen drier
Carbonoxide obtains the high-purity nitrogen that oxygen content is less than 5ppm.
The active ingredient of catalyst is platinum or platinum-nickel alloys, and active ingredient control is pressed 0.3%~0.5%
1000m3The nitrogen ability processed of/h, the usage amount of catalyst is 80~120 liters.The active ingredient of catalyst is higher, and usage amount is just
Opposite to reduce, reaction temperature also wants relative reduction.
Catalytic bed 3 is generally double-seal head barrel-type structure, nitrogen upper entering and lower leaving；There are supporting screening plate, graininess among cylinder
Catalyst be laid on supporting screening plate, the laying depth of the catalyst is generally 150~300mm.
Nitrogen drier 5 is the hollow tube-shape of about two end openings, and drier is interior to be equipped with sieve particle；Two dryings
The working method of device does adsorption and dehumidification for one, another does desorption and regeneration, periodically mutually switching.；Regeneration is using industry universal
The regenerated mode of heating, using come out from energy-saving heat exchanger 1~150 DEG C of nitrogen do regeneration heat source.The molecular sieve of selection will
Asking has the function of 5A molecular sieves or 13X molecular sieves and the other satisfactory molecular sieves of water removal and removing carbon dioxide.
It, all can profit in the case where not departing from the technical program ambit for any those skilled in the art
With the technology contents of the disclosure above the technical program is made many possible changes and modifications or be revised as equivalent variations etc.
Imitate embodiment.Therefore, every content without departing from technical solution of the present invention, technical spirit according to the invention is to above example
Any simple modifications, equivalents, and modifications done, should all still fall within technical solution of the present invention protection in the range of.
Claims (10)
1. a kind of system for nitrogen deoxidation of being come into being using public energy source combustion gas for nitrogen making machine, it is characterised in that：The system includes section
It can heat exchanger, heater, catalytic bed, cooler and nitrogen drier；Wherein, the upstream of the energy-saving heat exchanger is provided with just
Raw nitrogen intake line；Downstream by pipeline successively with heater, catalytic bed, energy-saving heat exchanger itself, cooler and nitrogen
Drier is connected, and exports high pure nitrogen in the delivery outlet of nitrogen drier；
Natural gas input channel is additionally provided on pipeline between the heater and catalytic bed；To input and nascent nitrogen
In the identical equivalents ratio of oxygen-containing equivalent public energy source combustion gas.
2. the system of nitrogen deoxidation according to claim 1 of being come into being using public energy source combustion gas for nitrogen making machine, feature are existed
In：The pipeline of the energy-saving heat exchanger upstream and downstream is respectively arranged at, is connected by temperature control bypass conduit.
3. the system of nitrogen deoxidation according to claim 2 of being come into being using public energy source combustion gas for nitrogen making machine, feature are existed
In：Gas flow controller is additionally provided in the temperature control bypass conduit.
4. the system of nitrogen deoxidation according to claim 1 of being come into being using public energy source combustion gas for nitrogen making machine, feature are existed
In：On pipeline between the energy-saving heat exchanger and cooler, the regeneration bypass channel time for flowing through nitrogen drier is additionally provided with
Road.
5. the system of nitrogen deoxidation according to claim 1 of being come into being using public energy source combustion gas for nitrogen making machine, feature are existed
In：The regeneration bypass channel circuit includes：By the passage of the heat source gas of energy-saving heat exchanger output；And it flows through nitrogen and does
The gas recovery approach of temperature is reduced after dry device.
6. the system of nitrogen deoxidation according to claim 1 of being come into being using public energy source combustion gas for nitrogen making machine, feature are existed
In：The catalytic bed is fixed catalytic bed, and used active ingredient is containing metal platinum or platinum, the particle of palladium mixture
Shape catalyst.
7. the system of nitrogen deoxidation according to claim 1 of being come into being using public energy source combustion gas for nitrogen making machine, feature are existed
In：The catalytic bed be double-seal head barrel-type structure, gas upper entering and lower leaving；There is supporting screening plate among cylinder, it is granular to urge
Agent is laid on supporting screening plate, and the laying depth of the catalyst is generally 150~300mm.
8. the system of nitrogen deoxidation according to claim 1 of being come into being using public energy source combustion gas for nitrogen making machine, feature are existed
In：The nitrogen drier is the hollow tube-shape of about two end openings, and drier is interior to be equipped with sieve particle；Two dryings
The working method of device does adsorption and dehumidification for one, another does desorption and regeneration, periodically mutually switching.
9. the system of nitrogen deoxidation according to claim 1 of being come into being using public energy source combustion gas for nitrogen making machine, feature are existed
In：The molecular sieve filled in the nitrogen drier be have the function of water removal and removing carbon dioxide 5A types molecular sieve or
13X type molecular sieves.
10. it is come into being the method for nitrogen deoxidation for nitrogen making machine using public energy source combustion gas using system described in claim 1, it is special
Sign is：Comprise the following steps：40 DEG C of the nascent nitrogen come from molecular sieve swing adsorption nitrogen producing apparatus, oxygen content 500
~10000ppm, part nitrogen are warming up to 250~350 DEG C by energy-saving heat exchanger heat exchange, and another part nitrogen is bypassed from temperature control
Pipeline is bypassed after energy-saving heat exchanger with last point of gas mixing, and gas flow in temperature control bypass conduit is arranged on by control
Controller, the flow control to the part nitrogen so that mixed temperature is no more than 310 DEG C, and then gas enters heater
It is heated to 310~350 DEG C；Nitrogen after being heated via heater injects identical equivalent proportion according to the oxygen-containing equivalent in nascent nitrogen
The public energy source combustion gas of example, mixed gas enters back into fixed catalytic bed and carries out deoxygenation, and releases amount of heat；After reaction
About 350~400 DEG C of gas be again introduced into energy-saving heat exchanger heat exchange be cooled to less than 180 DEG C recycling major part heats after, part
Hot gas enters cooler after regeneration bypass channel circuit further utilizes waste heat as the regeneration heat source of nitrogen drier, another
Portion gas is directly entered cooler cooling by energy-saving heat exchanger and is water-cooled to less than 40 DEG C, is taken off subsequently into nitrogen drier
Except moisture and carbon dioxide that reaction generates, the high-purity nitrogen that oxygen content is less than 5ppm is obtained.
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Application publication date: 20180529 |