CN105509414A - Heating device and heating method for oxygen-making expander - Google Patents
Heating device and heating method for oxygen-making expander Download PDFInfo
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Abstract
The invention discloses a heating device and a heating method for an oxygen-making expander. The device comprises a heating gas pipeline system and an analyzing control module, wherein the heating gas pipeline system mainly comprises an air compressor, a pre-cooling system, a molecular sieve system, an air separating system, an instrument gas header pipe, a first expander, and a second expander; the analyzing control module mainly comprises a dew point analysis unit, a carbon dioxide analysis unit and an alarm control unit. The heating method mainly comprises the following steps: step1, starting the oxygen-making expander and adopting instrument gas as heating gas until the air separating system is normally put into operation, and gas products are generated; and step 2, after the air separating system is put into operation, adopting air as heating gas. According to the technical scheme disclosed by the invention, a raw material air heating gas source and an instrument gas heating gas source are combined and mixed, and corresponding heating gas is selected for different working conditions, so that heating is not limited by time and is not affected by shut-down of the air compressor, and nitrogen gas pipe network balance is not affected.
Description
Technical field
The present invention relates to oxygen space division technique, more particularly, relate to a kind of heating apparatus and heating method of oxygen decompressor.
Background technology
The basic technology principle of the oxygen making unit of existing employing cryogenics is by steps such as compression, expansion, heat exchange, air is carried out degree of depth cooling, rectifying, utilizes each component boiling point different, thus isolates oxygen, nitrogen, argon product.Major process unit comprises: air compressor machine, chilldown system, molecular sieve system, booster expansion turbine (being called for short " decompressor "), space division system.Wherein, decompressor is very important process equipment, is that whole oxygenerator starts, the main force that puts into operation and normally produce, and its refrigerating capacity accounts for whole sky and divides and produce 85% of required cold.Decompressor has 2, the using and the reserved, as the first decompressor normally work time, second decompressor shut down for subsequent use.
For guaranteeing that expansion function normally works, must heat to it in advance, whole sky then can be made to divide bringing normally into operation.This is because:
1) rotating speed of decompressor is very high, and the air velocity in air deflector is very large.If be entrained with mechanical admixture or solid particle in the gas flow, the wearing and tearing of air deflector and blade can be caused, even break blade.Therefore, generally machine front filter is set before decompressor, with filtering metal impurities, solid carbon dioxide particle etc.Resistance will increase when the filter is clogged, and pressure drop is carried out heating, blowing down more than needing during 0.1MPa.
2) due to the impact by air-flow rolling action, molecular sieve adsorption usefulness, decompressor is after the long period is run, and operational efficiency will decline, and in order to extend its life cycle, must carry out heating thawing.
To sum up, must heat before decompressor puts into operation and after long-play, with adding wet from expander outlet to entrance blowback, discharge, until the gas of blowout arrives normal temperature dew point.In addition, medium of heating must be pure, dry gas.
The wet that adds of decompressor generally designs the pure raw material air (be called for short " air ") adopting outlet molecular sieve, because air has been removed the impurity such as moisture, carbon dioxide, pure, dry, and and non-product, cost is lower.But there is such drawback in it: do not have air under oxygenerator stopped status, decompressor cannot be heated in time; Must start at air compressor machine, load, send (about 1 hour), and after moving to the Impurity removals such as outlet molecular sieve moisture in air, carbon dioxide clean (about 4 hours), can start to heat, general warm-up time about 3 hours.Whole process need 1+4+3=8 hour, it is long that this just causes space division system time of putting into operation, and causes whole oxygenerator to start the increase of power consumption.
Based on this drawback, indivedual oxygenerator manufacturers design the medium pressure nitrogen gas product (be called for short " nitrogen ") of employing from pipe network as heating medium, because nitrogen can not interrupt in pipe network, and very pure, dry.But also there is other problem: 1) nitrogen is the product of oxygenerator, and cost comparatively air is high; 2) nitrogen mainly supplies main production line user (as cold rolling, hot rolling), and when heating for decompressor, in pipe network, nitrogen total amount reduces, to system balancing build-up of pressure; 3) when oxygenerator or nitrogen compressor fault jump car or other non-programmed halt, nitrogen output reduces, and need to be supplemented by liquid nitrogen vaporization, operation cost now will significantly rise.
Summary of the invention
Object of the present invention aims to provide a kind of heating apparatus and heating method of oxygen decompressor, solves the above-mentioned various deficiencies mentioned.
According to the present invention, provide a kind of heating apparatus of oxygen decompressor, comprise heat feed channel system and analysis and Control module.Wherein, feed channel of heating system comprises air compressor machine, chilldown system, molecular sieve system, space division system, instrument supply gas house steward, the first decompressor, the second decompressor.Analysis and Control module comprises dew point analysis unit, carboloy dioxide analysis unit and alarm control unit.The output of dew point analysis unit and carboloy dioxide analysis unit is all connected to alarm control unit, and the input of dew point analysis unit gathers the outlet data of molecular sieve system, instrument supply gas house steward, the first decompressor and the second decompressor, the input of carboloy dioxide analysis unit gathers the outlet data of molecular sieve system.
For achieving the above object, air compressor machine, chilldown system are connected successively with molecular sieve system, and the outlet conduit of molecular sieve system connects air respectively and to heat arm and space division system.Instrument supply gas house steward connects instrument supply gas and to heat arm, and air the heat outlet of arm of arm and instrument supply gas of heating is connected to inlet manifold of heating jointly, and inlet manifold of heating connects the first decompressor and the second decompressor respectively.First decompressor and the second decompressor are connected to outlet stool of heating, and the first decompressor and the second decompressor are all connected to space division system.
For achieving the above object, the input of dew point analysis unit is connected to the outlet conduit of molecular sieve system respectively, instrument supply gas heats arm, the outlet stool of heating of heat outlet stool and second decompressor of the first decompressor.The input of carboloy dioxide analysis unit is connected to the outlet conduit of molecular sieve system.Dew point analysis unit and carboloy dioxide analysis unit output be connected alarm control unit.
For achieving the above object, dew point analysis unit comprises air dew point sampling pipe, outlet dew point sampling pipe heated by instrument supply gas dew point sampling pipe, the first decompressor, outlet dew point sampling pipe heated by the second decompressor.Air dew point sampling pipe is connected to the outlet conduit of molecular sieve, instrument supply gas dew point sampling pipe is connected to instrument supply gas and heats arm, first decompressor is heated and is exported the outlet stool of heating that dew point sampling pipe is connected to the first decompressor, and the second decompressor is heated and exported the outlet stool of heating that dew point sampling pipe is connected to the second decompressor.
For achieving the above object, dew point analysis unit also comprises reversal valve and dew point analysis instrument, and reversal valve comprises the first arrival end, the second arrival end, the 3rd arrival end and the 4th arrival end.First arrival end connects air dew point sampling pipe, and the second arrival end connects instrument supply gas dew point sampling pipe, and the 3rd arrival end connects the first decompressor and to heat outlet dew point sampling pipe, and the 4th arrival end connects the second decompressor and to heat outlet dew point sampling pipe.The output of reversal valve connects the input of dew point analysis instrument, and the output of dew point analysis instrument is connected to alarm control unit.
For achieving the above object, the arrival end of the outlet stool of heating of the first decompressor is connected to the first decompressor, and its port of export is communicated with air.The arrival end of the outlet stool of heating of the second decompressor is connected to the second decompressor, and its port of export is communicated with air.
For achieving the above object, the instrument supply gas adopted in feed channel of heating system is mixed after decompression by air, medium pressure nitrogen gas, high pressure nitrogen, is oxygenerator predistribution or gas more than needed.
According to a further aspect in the invention, also provide a kind of heating method of oxygen decompressor, comprise the following steps: step 1, oxygen decompressor starts, and adopts instrument supply gas as adding wet, until space division system formally puts into operation and has gas products output.Step 2, after space division system puts into operation, adopts air as adding wet.
For achieving the above object, step 1 also comprises: step 1.1, start air compressor machine, then loading, force feed raw air remove chilldown system, now switch reversal valve, make the dew point value of dew point analysis instrument analysis meter gas dew point sampling pipe, confirm that the dew point value of instrument supply gas dew point sampling pipe is qualified by alarm indication unit.Step 1.2, first decompressor, the second decompressor are heated for adding wet with instrument supply gas, carry out following 3 operations: switch reversal valve simultaneously, make the dew point value that dew point analysis instrument replaces analysis first decompressor, the second decompressor is heated exports, observed the dew point value of the first decompressor, the second decompressor by alarm control unit.Anakmetomeres screen system.Utilize carboloy dioxide analysis element analysis carbon dioxide values.Step 1.3, the first decompressor, the second decompressor terminate to heat, and wait puts into operation, and cuts off instrument supply gas, terminate process of heating.Step 1.4, switches reversal valve, makes the dew point value of dew point analysis instrument analyzing molecules screen system outlet conduit, by the dew point value of alarm control unit display molecular sieve system outlet conduit.Step 1.5, the first decompressor, the second decompressor wherein one put into operation, another shutdown is for subsequent use, and space division system puts into operation.
For achieving the above object, step 2 also comprises: step 2.1, and raw air is inputted space division system, guarantees that in molecular sieve system, carbon dioxide values and dew point value are qualified simultaneously.Step 2.2, heating to the first decompressor or the second decompressor for adding wet with air, detecting the dew point value of the first decompressor or the second decompressor simultaneously.Step 2.3, if the dew point value of the first decompressor or the second decompressor is qualified, then end of heating, waits for next time and puts into operation, switch reversal valve simultaneously, make the dew point value of dew point analysis instrument analyzing molecules screen system outlet conduit.
Have employed technical scheme of the present invention; by combination, the allotment of raw air and instrument supply gas two kinds of sources of the gas of heating; for different working condition; select to add wet accordingly; realize decompressor with minimum operation cost to heat, put into operation; and heat not by time restriction, not shutting down by air compressor machine affects, and does not also affect Nitrogen pipe network balance.
Accompanying drawing explanation
In the present invention, identical Reference numeral represents identical feature all the time, wherein:
Fig. 1 is that decompressor of the present invention is heated feed channel schematic diagram;
Fig. 2 is analysis and Control module diagram of the present invention.
Detailed description of the invention
Technical scheme of the present invention is further illustrated below in conjunction with drawings and Examples.
The object of the present invention is to provide a kind of heating apparatus of oxygen decompressor and method for commissioning of heating, can realize low cost, heat to decompressor as required, in time, not shutting down by oxygenerator affects, and does not affect Nitrogen pipe network system balancing.
According to the present invention, provide a kind of heating apparatus of oxygen decompressor on the one hand.Comprise: feed channel of heating, analysis and Control module.
See Fig. 1, the heating apparatus of oxygen decompressor of the present invention, comprises heat feed channel system and analysis and Control module.Wherein, feed channel of heating system comprises air compressor machine 1, chilldown system 2, molecular sieve system 3, space division system 4, instrument supply gas house steward 41, first decompressor 51, second decompressor 52.
Feed channel of heating comprises: heat arm 61, instrument supply gas of air is heated the outlet stool 65 of heating of outlet stool 64, second decompressor 52 of heating of arm 62, inlet manifold of heating 63, first decompressor 51.
As shown in Figure 1, air compressor machine 1, chilldown system 2 are connected successively with molecular sieve system 3, and the outlet conduit 31 of molecular sieve system 3 connects air respectively and to heat arm 61 and space division system 4.Instrument supply gas house steward 41 connects instrument supply gas and to heat arm 62, and air the heat outlet of arm 62 of arm 61 and instrument supply gas of heating is connected to inlet manifold 63 of heating jointly, and inlet manifold of heating 63 connects the first decompressor 51 and the second decompressor 52 respectively.First decompressor 51 and the second decompressor 52 are connected to outlet stool 64,65 of heating, and the first decompressor 51 and the second decompressor 52 are all connected to space division system 4.
Further, air is heated arm 61, and its arrival end connects molecular sieve system 3 outlet conduit 31, and the port of export connects decompressor and to heat inlet manifold 63, is provided with successively: stop valve 611, in order to conducting or the shutoff of air; Pressure-reducing valve 612, by air voltage stabilizing between 400-500kPa; Check-valves 613, prevents gas downstream from flowing backwards, contaminated air pipeline.
Instrument supply gas is heated arm 62, and its arrival end connects oxygenerator instrument supply gas house steward 41, and the port of export connects decompressor and to heat inlet manifold 63, is provided with successively: stop valve 621, in order to conducting or the shutoff of instrument supply gas; Pressure-reducing valve 622, by instrument supply gas voltage stabilizing between 400-500kPa; Check-valves 623, prevents gas downstream from flowing backwards, and pollutes instrument supply gas pipeline.
Instrument supply gas, being mixed after decompression by air, medium pressure nitrogen gas, high pressure nitrogen, is oxygenerator predistribution or gas more than needed, become current between air and nitrogen, cheaper, and can not interrupt, possess pure, dry feature, meet gas quality requirement of heating completely.
Heat inlet manifold 63, its arrival end jointly connects heat arm 61, instrument supply gas of air and to heat arm 62, and be provided with safety valve 633, the pressure release when gas in pipelines abnormal overpressure, to guarantee safety; Its port of export connects the outlet conduit 632 of outlet conduit 631, second decompressor 52 of the first decompressor 51 respectively, and is respectively equipped with stop valve 514,524; The outlet conduit 631 of the first decompressor 51 goes the pipeline of empty point 4 is also provided with stop valve 513, and the outlet conduit 632 of the second decompressor 52 goes the pipeline of empty point 4 is also provided with stop valve 523, all closes when heating, and prevents adding wet and enters empty point 4.
The outlet stool 64 of heating of the first decompressor 51, its arrival end connects the first expander inlet, and between expander inlet stop valve 511 and machine front filter 512, the port of export is communicated with air, be provided with successively: safety valve 515, the pressure release when gas in pipelines abnormal overpressure, to guarantee safety; Stop valve 516, close when not heating, positive airflow when preventing decompressor from normally running is to air.
The outlet stool 65 of heating of the second decompressor 52, its arrival end connects the second expander inlet, and between expander inlet stop valve 521 and machine front filter 522, the port of export is communicated with air, be provided with successively: safety valve 525, the pressure release when gas in pipelines abnormal overpressure, to guarantee safety; Stop valve 526, close when not heating, positive airflow when preventing decompressor from normally running is to air.
See Fig. 2, and composition graphs 1, analysis and Control module comprises: dew point analysis unit, carboloy dioxide analysis unit, alarm control unit 90.The output of dew point analysis unit and carboloy dioxide analysis unit is all connected to alarm control unit 90, and the input of dew point analysis unit gathers the outlet data of molecular sieve system 3, instrument supply gas house steward 41, first decompressor 51 and the second decompressor 52, the input of carboloy dioxide analysis unit gathers the outlet data of molecular sieve system 3.Describe the annexation of above-mentioned all parts below in detail.
Dew point analysis instrument unit, gathers feed channel each point gas of heating, analyzes wherein dew point value, and analysis result is flowed to alarm control unit, comprise: air dew point sampling pipe 711, one end connects outlet molecular sieve pipeline 31, and the other end connects the first arrival end 751 of reversal valve 75; Instrument supply gas dew point sampling pipe 721, one end connects instrument supply gas and to heat arm 62, and the other end connects the second arrival end 752 of reversal valve 75; First decompressor adds wet outlet dew point sampling pipe 731, and one end connects outlet stool 64 of heating, and the other end connects the 3rd arrival end 753 of reversal valve 75; Second decompressor adds wet outlet dew point sampling pipe 741, and one end connects outlet stool 65 of heating, and the other end connects the 4th arrival end 754 of reversal valve 75; Reversal valve 75, the port of export connects dew point analysis instrument 76; Dew point analysis instrument 76, is electrically connected with alarm control unit 90.
Alternatively, on air dew point sampling pipe 711, before entering reversal valve 75, be connected with a bypass branch 712, this bypass branch is provided with flowmeter 713, to control bypass flow.
Alternatively, on instrument supply gas dew point sampling pipe 721, before entering reversal valve 75, be connected with a bypass branch 722, this bypass branch is provided with flowmeter 723, to control bypass flow.
Alternatively, the first decompressor adds on wet outlet dew point sampling pipe 731, and before entering reversal valve 75, be connected with a bypass branch 732, this bypass branch is provided with flowmeter 733, to control bypass flow.
Alternatively, the second decompressor adds on wet outlet dew point sampling pipe 741, and before entering reversal valve 75, be connected with a bypass branch 742, this bypass branch is provided with flowmeter 743, to control bypass flow.
Alternatively, the port of export of dew point analysis instrument 76 is connected with an outlet 762, this outlet is provided with flowmeter 763, is used for controlling into flow-meter.
Carboloy dioxide analysis unit, gathers molecular sieve system outlet air, analyzes wherein carbon dioxide values, and analysis result is flowed to alarm control unit, comprise: sampling pipe 811, one end connects molecular sieve system outlet conduit 31, and the other end connects capnograph 86; Capnograph 86, is electrically connected with alarm control unit 90.
Alternatively, on sampling pipe 811, before entering capnograph 86, be connected with a bypass branch 812, this bypass branch is provided with flowmeter 813, to control bypass flow.
Alternatively, the port of export of capnograph 86 is connected with an outlet 862, this outlet is provided with flowmeter 863, is used for controlling into flow-meter.
Alarm control unit 90, is electrically connected with dew point analysis instrument 76, capnograph 86 respectively, and shows carbon dioxide values, dew point value, report to the police, and points out, controls the warming operation of decompressor.
According to the present invention, provide a kind of method for commissioning of heating of oxygen decompressor on the other hand.
A) during oxygenerator thermal starting, do not have air, and consider that shortening empty point puts into operation the time, then adopt instrument supply gas for adding wet, now, decompressor heating method step is as follows:
A1) start air compressor machine 1, then loading, force feed raw air remove chilldown system 2, whole process about 1 hour.
Synchronously carry out ground, switch reversal valve 75, make dew point analysis instrument 76 analysis meter gas 721 dew point value, confirm that instrument supply gas 721 dew point value is qualified by alarm indication unit 90.
A2) close respectively the entrance stop valve 511 of decompressor 51,52,521, outlet stop valve 513,523; Close air to heat stop valve 611, open instrument supply gas and to heat stop valve 621; Open decompressor to heat entrance stop valve 514,524, outlet stop valve 516,526 of heating; Then decompressor 51,52 is heated for adding wet with instrument supply gas 62, whole process about 3 hours.
Synchronously carry out ground, switch reversal valve 75, make dew point analysis instrument 76 alternately analyze decompressor 51,52 and to heat outlet 731,741 dew point value, observe dew point value by alarm control unit 90.
Synchronously carry out ground, run molecular sieve system 3, enter molecular sieve system and activated molecular sieve through the cooled raw air of chilldown system 2, about 4 hours.
Synchronously carry out ground, capnograph 86 analyzes Carbon Dioxide in Air value, by alarm control unit 90 long display carbon dioxide values.
A3) the first decompressor is heated qualified to outlet 731 dew point value, and close and to heat entrance stop valve 514, outlet stop valve 516, first decompressor of heating terminates to heat, and wait puts into operation.
Second decompressor is heated qualified to outlet 741 dew point value, closes entrance stop valve 524 of heating, and outlet stop valve 526, second decompressor of heating terminates to heat, and wait puts into operation.
Close instrument supply gas stop valve 621, the whole process of heating terminates.
A4) switch reversal valve 75, make dew point analysis instrument 76 analyze air 711 dew point value, by this dew point value of the long display of alarm control unit 90.
A5) open entrance stop valve 511, outlet stop valve 513, raw air is just flowing through the first decompressor 51, and goes to empty point of 4, first decompressor 51 and put into operation; Now, the second decompressor 52 is shut down for subsequent use.
Or open entrance stop valve 521, outlet stop valve 523, raw air is just flowing through the second decompressor 52, and go to empty point of 4, second decompressor 52 and put into operation; Now, the first decompressor 51 is shut down for subsequent use.
Now, space division system formally puts into operation, until gas products output.
Use the method step, 3 hours that make that decompressor is heated required, fall within air compressor machine completely and start in 5 hours that complete to molecular sieve activation, namely for empty point is put into operation and shorten 3 hours, the air compressor machine saved 3 hours does not rise in value operation power consumption, and economic benefit is considerable.
B) sky divide normally run time, heat if need shut down operating decompressor (for the first decompressor), consider that air cost is lower than instrument supply gas, then adopt air for adding wet, now, decompressor heating method step is as follows:
B1) open the entrance stop valve 521 of the second decompressor 52 for subsequent use, outlet stop valve 523, raw air is just flowing through the second decompressor 52, and goes to space division system 4;
Synchronously carry out ground, confirm that in air 811, carbon dioxide values is qualified by alarm control unit 90.
Synchronously carry out ground, confirm that air 711 dew point value is qualified by alarm control unit 90.
B2) the first decompressor 51 entrance stop valve 511, outlet stop valve 513 is closed; Close instrument supply gas to heat stop valve 621, open air cutoff valve 611; Open the first decompressor heat entrance stop valve 514, heat outlet stop valve 516; Then the first decompressor 51 is heated for adding wet with air 61, whole process about 3 hours.
Synchronously carry out ground, switch reversal valve 75, make dew point analysis instrument 76 analyze the first decompressor 51 and to heat outlet 731 dew point value, observe this dew point value by alarm control unit 90.
B3) the first decompressor 51 heat qualified to outlet 731 dew point value, close air cutoff valve 611, entrance stop valve 514 of heating, heat outlet stop valve 516, decompressor terminates to heat, wait for next time put into operation.
Synchronously carry out ground, switch reversal valve 75, make dew point analysis instrument 76 analyze air 711 dew point value, by this dew point value of the long display of alarm control unit 90.
In sum; oxygen decompressor heating apparatus of the present invention and method for commissioning of heating; by combination, the allotment of raw air and instrument supply gas two kinds of sources of the gas of heating; for different working condition; select to add wet accordingly, realize decompressor with minimum operation cost and heat, put into operation, and heat not by time restriction; do not shut down by air compressor machine and affect, do not affect Nitrogen pipe network balance yet.
Those of ordinary skill in the art will be appreciated that, above description is only one or more embodiments in the numerous embodiment of the present invention, and not uses limitation of the invention.The change of any equalization for above embodiment, modification and the equivalent technical scheme such as to substitute, as long as spirit according to the invention, all will drop in scope that claims of the present invention protect.
Claims (10)
1. a heating apparatus for oxygen decompressor, comprises heat feed channel system and analysis and Control module, it is characterized in that:
Described feed channel system of heating comprises air compressor machine, chilldown system, molecular sieve system, space division system, instrument supply gas house steward, the first decompressor, the second decompressor;
Described analysis and Control module comprises dew point analysis unit, carboloy dioxide analysis unit and alarm control unit;
The output of described dew point analysis unit and described carboloy dioxide analysis unit is all connected to described alarm control unit, and the input of described dew point analysis unit gathers the outlet data of described molecular sieve system, instrument supply gas house steward, the first decompressor and the second decompressor, and the input of described carboloy dioxide analysis unit gathers the outlet data of described molecular sieve system.
2. the heating apparatus of oxygen decompressor as claimed in claim 1, is characterized in that:
Described air compressor machine, chilldown system are connected successively with molecular sieve system, and the outlet conduit of described molecular sieve system connects air respectively and to heat arm and described space division system;
Described instrument supply gas house steward connects instrument supply gas and to heat arm, and the heat outlet of arm of arm and described instrument supply gas of heating of described air is connected to inlet manifold of heating jointly, described in inlet manifold of heating connect described first decompressor and the second decompressor respectively;
Described first decompressor and the second decompressor are connected to outlet stool of heating, and the first decompressor and the second decompressor are all connected to described space division system.
3. the heating apparatus of oxygen decompressor as claimed in claim 2, is characterized in that;
The input of described dew point analysis unit is connected to the outlet conduit of described molecular sieve system respectively, instrument supply gas heats arm, the outlet stool of heating of heat outlet stool and second decompressor of the first decompressor;
The input of described carboloy dioxide analysis unit is connected to the outlet conduit of described molecular sieve system;
Described dew point analysis unit and carboloy dioxide analysis unit output be connected described alarm control unit.
4. the heating apparatus of oxygen decompressor as claimed in claim 3, it is characterized in that, described dew point analysis unit comprises air dew point sampling pipe, outlet dew point sampling pipe heated by instrument supply gas dew point sampling pipe, the first decompressor are heated outlet dew point sampling pipe, the second decompressor;
Described air dew point sampling pipe is connected to the outlet conduit of described molecular sieve;
Described instrument supply gas dew point sampling pipe is connected to described instrument supply gas and heats arm;
Described first decompressor is heated and is exported the outlet stool of heating that dew point sampling pipe is connected to described first decompressor;
Described second decompressor is heated and is exported the outlet stool of heating that dew point sampling pipe is connected to described second decompressor.
5. the heating apparatus of oxygen decompressor as claimed in claim 4, it is characterized in that, described dew point analysis unit also comprises reversal valve and dew point analysis instrument, and described reversal valve comprises the first arrival end, the second arrival end, the 3rd arrival end and the 4th arrival end;
Described first arrival end connects described air dew point sampling pipe;
Described second arrival end connects described instrument supply gas dew point sampling pipe;
Described first decompressor of described 3rd arrival end connection is heated and is exported dew point sampling pipe;
Described second decompressor of described 4th arrival end connection is heated and is exported dew point sampling pipe;
The output of described reversal valve connects the input of described dew point analysis instrument, and the output of described dew point analysis instrument is connected to described alarm control unit.
6. the heating apparatus of oxygen decompressor as claimed in claim 2, is characterized in that:
The arrival end of the outlet stool of heating of described first decompressor is connected to described first decompressor, and its port of export is communicated with air;
The arrival end of the outlet stool of heating of described second decompressor is connected to described second decompressor, and its port of export is communicated with air.
7. the heating apparatus of oxygen decompressor as claimed in claim 1, is characterized in that:
The instrument supply gas adopted in described feed channel system of heating is mixed after decompression by air, medium pressure nitrogen gas, high pressure nitrogen, is oxygenerator predistribution or gas more than needed.
8. a heating method for oxygen decompressor, is characterized in that, comprises the following steps:
Step 1, oxygen decompressor starts, and adopts instrument supply gas as adding wet, until space division system formally puts into operation and has gas products output;
Step 2, after described space division system puts into operation, adopts air as adding wet.
9. the heating method of oxygen decompressor as claimed in claim 8, it is characterized in that, described step 1 also comprises:
Step 1.1, starts air compressor machine, and then loading, force feed raw air remove chilldown system, now switch reversal valve, make the dew point value of dew point analysis instrument analysis meter gas dew point sampling pipe, confirms that the dew point value of instrument supply gas dew point sampling pipe is qualified by alarm indication unit;
Step 1.2, heats to the first decompressor, the second decompressor for adding wet with instrument supply gas, carries out following 3 operations simultaneously:
Switch reversal valve, make the dew point value that dew point analysis instrument replaces analysis first decompressor, the second decompressor is heated exports, observed the dew point value of the first decompressor, the second decompressor by alarm control unit;
Anakmetomeres screen system;
Utilize carboloy dioxide analysis element analysis carbon dioxide values;
Step 1.3, the first decompressor, the second decompressor terminate to heat, and wait puts into operation, and cuts off instrument supply gas, terminate process of heating;
Step 1.4, switches reversal valve, makes the dew point value of dew point analysis instrument analyzing molecules screen system outlet conduit, by the dew point value of alarm control unit display molecular sieve system outlet conduit;
Step 1.5, the first decompressor, the second decompressor wherein one put into operation, another shutdown is for subsequent use, and space division system puts into operation.
10. the heating method of oxygen decompressor as claimed in claim 8, it is characterized in that, described step 2 also comprises:
Step 2.1, inputs space division system by raw air, guarantees that in molecular sieve system, carbon dioxide values and dew point value are qualified simultaneously;
Step 2.2, heating to the first decompressor or the second decompressor for adding wet with air, detecting the dew point value of the first decompressor or the second decompressor simultaneously;
Step 2.3, if the dew point value of the first decompressor or the second decompressor is qualified, then end of heating, waits for next time and puts into operation, switch reversal valve simultaneously, make the dew point value of dew point analysis instrument analyzing molecules screen system outlet conduit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860171A (en) * | 2017-11-01 | 2018-03-30 | 西安交通大学 | A kind of cryogenic liquid expanding machine shutdown system and method |
| CN112556229A (en) * | 2020-12-08 | 2021-03-26 | 江西远大科技有限公司 | Throttling and pressure-stabilizing refrigerating device of ultralow-temperature refrigerating equipment |
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| US6079223A (en) * | 1999-05-04 | 2000-06-27 | Praxair Technology, Inc. | Cryogenic air separation system for producing moderate purity oxygen and moderate purity nitrogen |
| JP2002147949A (en) * | 2000-11-14 | 2002-05-22 | Nippon Sanso Corp | Air liquefying separation method and device |
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| CN202485333U (en) * | 2012-01-10 | 2012-10-10 | 宝山钢铁股份有限公司 | Auxiliary heating device of main space division heat exchanger |
| CN203478838U (en) * | 2013-09-03 | 2014-03-12 | 安徽淮化股份有限公司 | Device for quickly starting air separation unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107860171A (en) * | 2017-11-01 | 2018-03-30 | 西安交通大学 | A kind of cryogenic liquid expanding machine shutdown system and method |
| CN112556229A (en) * | 2020-12-08 | 2021-03-26 | 江西远大科技有限公司 | Throttling and pressure-stabilizing refrigerating device of ultralow-temperature refrigerating equipment |
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| Publication number | Publication date |
|---|---|
| CN105509414B (en) | 2017-12-26 |
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