CN105928319A - Cryogenic nitrogen generation control system - Google Patents
Cryogenic nitrogen generation control system Download PDFInfo
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- CN105928319A CN105928319A CN201610322386.7A CN201610322386A CN105928319A CN 105928319 A CN105928319 A CN 105928319A CN 201610322386 A CN201610322386 A CN 201610322386A CN 105928319 A CN105928319 A CN 105928319A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
- F25J3/0406—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of nitrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
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- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
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- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
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- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/044—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a single pressure main column system only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04775—Air purification and pre-cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04812—Different modes, i.e. "runs" of operation
- F25J3/04824—Stopping of the process, e.g. defrosting or deriming; Back-up procedures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04848—Control strategy, e.g. advanced process control or dynamic modeling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
- F25J3/04951—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network
- F25J3/04957—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network and inter-connecting equipments upstream of the fractionation unit (s), i.e. at the "front-end"
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/72—Refluxing the column with at least a part of the totally condensed overhead gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/42—Nitrogen
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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention discloses a cryogenic nitrogen generation control system. The cryogenic nitrogen generation control system comprises an air filtering compression device, an air pre-cooling device, a molecular sieve purification device, a heat exchange device, an air rectification column, an expansion refrigeration device, a reserved liquid supply device, an analyzer, a temperature control element, pressure control elements, liquid level control elements, an automatic on/off controller, a pre-cooling switching controller and the like, which are connected via pipelines and valves, switching controllers and the pressure control elements are utilized for automatic control, all the devices in the whole system are orderly combined as a whole for control to realize full automation of cryogenic nitrogen generation, the cryogenic nitrogen generation cost is lowered, and the cryogenic nitrogen generation time is saved.
Description
Technical field
The present invention relates to deep-cooling nitrogen-making field, particularly relate to a kind of deep-cooling nitrogen-making control system.
Background technology
At present, deep-cooling nitrogen-making system includes that air filtration compressor, air precooler, molecular sieve purification fill
Put, air rectifying column, standby liquid supplying apparatus and instrument supply gas switching device, about opening of deep-cooling nitrogen-making system
Dynamic, all progressively start according to each device, start before this air filtration compressor, air precooler,
Restart molecular sieve purification device, rear startup air rectifying column, run into fault and manually boot standby liquid supply again
Device and instrument supply gas switching device, not by orderly combining between each device in whole system,
Being controlled as an entirety, current deep-cooling nitrogen-making system wastes time and energy, and increases cost, human input
Greatly.The equipment switching of each device and putting into operation of startup, regulating working conditions and analyser, all need people to operate, with
As for not realizing automatization and purpose cost-effective, that minimizing device starts the time.
Summary of the invention
It is an object of the invention to provide a kind of deep-cooling nitrogen-making control system, it is intended to realize deep-cooling nitrogen-making process
Automatization, thus save time and cost.
In order to solve above-mentioned technical problem, the invention provides a kind of deep-cooling nitrogen-making control system, deep-cooling nitrogen-making control
System processed includes: air filtration compressor, air precooler, pre-cooling switch controller, temperature control unit
Part, molecular sieve purification device, heat-exchanger rig, air rectifying column, swell refrigeration device, standby liquid supply dress
Put, the first switch controller, the second switch controller, the 3rd switch controller, letdown tank, the first escaper,
Second escaper, the first pressure control valve, the second pressure control valve, the 3rd pressure control valve, first
Regulation valve and tank gage；
After air filtration is compressed by described air filtration compressor, by pipeline, the first valve, the second valve
Flowing to described air precooler, described air precooler includes the first precooler and the second precooler, institute
Stating the first valve to be connected with described first precooler by pipeline, described second valve passes through pipeline and described second
Precooler connects；
Described first escaper is pre-with described air filtration compressor and described air by pipeline, the 3rd valve
Pipeline between device for cooling connects, and wherein, the 3rd valve is also electrically connected with described first pressure control valve,
Described first pressure control valve be used for measuring described air filtration compressor and described air precooler it
Between pipeline in air pressure, and according to the aperture of the 3rd valve described in described air-pressure controlling；
Described air precooler, for entering institute by described first precooler and/or the second precooler pre-cooling
State the air within air precooler, and the air after pre-cooling is flowed to described molecular sieve purification by pipeline
Device；
Described pre-cooling switch controller respectively with described first valve, the second valve, the first precooler, second pre-
Cold and temperature control component are electrically connected with, and described temperature control component is used for detecting described air precooler will
Air flows to the air themperature in described molecular sieve purification device by pipeline, and described air themperature is sent
To described pre-cooling switch controller, described pre-cooling switch controller is used for controlling described first valve, the second valve
Switch, described pre-cooling switch controller is always according to the first precooler described in described air temperature control, second pre-
The keying of cold；
Described molecular sieve purification device, by after air purge, flows to institute by pipeline and through described heat-exchanger rig
Stating air rectifying column, described heat-exchanger rig is used for reducing air themperature, and described air rectifying column is used for preparing nitrogen；
Described air rectifying column includes that tower portion and lower tower part, described tank gage include tank gage and lower liquid level
Instrument, described upper tower portion and described lower tower part are connected by pipeline, the first regulation valve, described upper tank gage and described
Second pressure control valve is arranged on described upper tower portion, and described upper tank gage is for measuring the liquid in described upper tower portion
The height in body fluid face, described second pressure control valve is for measuring the pressure in tower portion, described lower tank gage
Being arranged on described lower tower part, described lower tank gage is for measuring the height of the liquid levels in described lower tower part, institute
State the first regulation valve, lower tank gage, the second pressure control valve to be all electrically connected with described first switch controller,
Described first switch controller pressure in the height and upper tower portion of the liquid levels according to described lower tower part
Controlling the regulation action of described first regulation valve, described upper tank gage and described second switch controller electrically connect
Connecing, the bottom in described upper tower portion is connected with described letdown tank by pipeline, the 4th valve, and described 4th valve is also
Being electrically connected with described upper tank gage, described upper tank gage controls the switch of described 4th valve and discharges described upper tower
Portion's oxygen enriched liquid also diffuses after vaporization in described letdown tank, and the top of described lower tower part is provided with nitrogen delivery outlet,
Nitrogen is transported to user's output port, and nitrogen by pipeline and through described heat-exchanger rig by described nitrogen delivery outlet
Pipeline between gas delivery outlet and described user's output port is provided with the 5th valve；
The top in described upper tower portion is provided with dirty nitrogen delivery outlet, and described dirty nitrogen delivery outlet is passed through by pipeline
Described heat-exchanger rig is connected with described swell refrigeration device, wherein, and described pipeline after described heat-exchanger rig
It is provided with the 6th valve, described 6th valve and described second switch controller to be electrically connected with, described second switching
Controller controls the switch of described 6th valve, and described swell refrigeration device fills by pipeline and through described heat exchange
Put and be connected with described molecular sieve purification device, for changing through described after the dirty nitrogen swell refrigeration in upper tower portion
The conduct regeneration source of the gas of described molecular sieve purification device is flowed to after thermal re-heat；
Described standby liquid supplying apparatus includes the first output port and the second output port, described first outfan
Mouth is connected with the described bottom in upper tower portion and the top of described lower tower part by pipeline, the 7th valve, and the described 7th
Valve is electrically connected with described second switch controller, and described second switch controller controls described 7th valve
Switch, for providing standby cold to described air rectifying column；Described second output port passes through pipeline and user
Output port connects, and the pipeline between described second output port and described user's output port is provided with and relies on oneself
Formula pressure regulator valve group, described Self-driven pressure-adjusting valve group is for controlling the output nitrogen of described standby liquid supplying apparatus
Stablizing of pressure, it is achieved provide the user with standby nitrogen by described user's output port；
Described second escaper by pipeline, the 8th valve with described through heat-exchanger rig and described 5th valve it
Between pipeline connect, described second escaper for control provide the user with nitrogen by described user's output port
Pressure, wherein, the 8th valve also with described 3rd pressure control valve be electrically connected with, described 3rd pressure control
Element processed is used for measuring the nitrogen pressure in described pipeline through heat-exchanger rig and between described 5th valve, and
The aperture of described 8th valve is controlled according to described nitrogen pressure.
Preferably, described system also includes that described standby liquid supplying apparatus is located at by an analyser, described analyser
The second output port and described user's output port between, and with described 5th valve be electrically connected with, described point
Analyzer flows to the oxygen content of nitrogen of user for measuring, and described analyser includes two air inlet port, wherein,
One air inlet port is connected with described second output port by pipeline, the 9th valve, and another air inlet port is by pipe
Road, the tenth valve are connected with described pipeline through heat-exchanger rig and between described 5th valve, described 9th valve
Door, the tenth valve are electrically connected with described 3rd switch controller, and described 3rd switch controller is used for controlling institute
State the 9th valve and the switch of the tenth valve.
Preferably, described system also includes instrument air device and the 4th pressure control valve, described instrument air
Device is connected with the second output port of described standby liquid supplying apparatus by pipeline, the 12nd valve, described
Instrument air device also by pipeline, the 11st valve and described molecular sieve purification device and described heat-exchanger rig it
Between airflow pipe connect, wherein, described 12nd valve electrically connects with described 4th pressure control valve
Connecing, described 4th pressure control valve is for measuring between described molecular sieve purification device and described heat-exchanger rig
Air pressure in airflow pipe, and according to described in the air-pressure controlling in described airflow pipe
The switch of 12 valves, the valve that described instrument air device is described deep-cooling nitrogen-making control system provides power gas
Source, wherein, the valve of described deep-cooling nitrogen-making control system is operated pneumatic valve.
Preferably, described system also includes the 3rd escaper and the 5th pressure control valve, described 3rd escaper
Being connected by pipeline and described molecular sieve purification device, described 3rd escaper is also by pipeline, the 13rd valve
The pipeline of the dirty nitrogen of conveying being connected with through described heat-exchanger rig and described molecular sieve purification device connects, its
In, described 13rd valve is electrically connected with described 5th pressure control valve, described 5th pressure control valve
For measuring the described dirty nitrogen of the conveying through described heat-exchanger rig and the connection of described molecular sieve purification device
Dirty nitrogen pressure in pipeline, and according to the aperture of the 13rd valve described in described dirty nitrogen Stress control,
Described 3rd escaper is used for controlling described molecular sieve purification device regeneration gas pressure balance.
Preferably, described system also includes the second regulation valve, and described second regulation valve is by pipeline and described expansion
The air inlet of refrigerating plant and blowing mouth connect, and wherein, at described air inlet, there is described 6th valve at interval；
Described second regulation valve is electrically connected with described second pressure control valve, described second pressure control valve
It is additionally operable to control the regulation action of the second regulation valve.
Preferably, described system also include molecular sieve purification control device, described molecular sieve purification control device and
Described molecular sieve purification device is electrically connected with, and is used for controlling the work of described molecular sieve purification device.
Preferably, described system also includes computer, described pre-cooling switch controller, the first switch controller,
Second switch controller, the 3rd switch controller and molecular sieve purification control device all with described computer communication even
Connect.
Preferably, described pre-cooling switch controller includes cyclelog PLC, described cyclelog PLC root
The first precooler described in described air temperature control and the second precooler is measured according to described temperature control component
Open and close.
Beneficial effect: a kind of deep-cooling nitrogen-making control system that embodiments of the invention provide, this system includes: empty
Gas filtration pressure compression apparatus, air precooler, pre-cooling switch controller, temperature control component, molecular sieve purification
Device, heat-exchanger rig, air rectifying column, swell refrigeration device, standby liquid supplying apparatus, these devices lead to
Piping and valve connect, and are utilizing switch controller and pressure control valve to automatically control, by whole system
Orderly combining between each device in system, is controlled as an entirety, it is achieved deep-cooling nitrogen-making
Automatization, saved cost and the time of deep-cooling nitrogen-making technique.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to embodiment or prior art
In description, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only
Some embodiments of the present invention, for those of ordinary skill in the art, are not paying creative work
Under premise, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structure chart of the deep-cooling nitrogen-making control system that one embodiment of the invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to the present invention.Should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
Fig. 1 shows the structure chart of the deep-cooling nitrogen-making control system that one embodiment of the invention provides, as it is shown in figure 1,
This deep-cooling nitrogen-making control system includes: air filtration compressor 11, air precooler 12, pre-cooling switching
Controller 120, temperature control component TICA101, molecular sieve purification device 13, heat-exchanger rig 14, air essence
Evaporate tower 15, swell refrigeration device 16, standby liquid supplying apparatus the 17, first switch controller K1, second cut
Changer controller K2, the 3rd switch controller K3, letdown tank the 101, first escaper SL201, the second escaper
SL202, the first pressure control valve PIC301, the second pressure control valve PIC302, the 3rd Stress control unit
Part PIC303, the first regulation valve TF11 and tank gage, wherein, tank gage includes tank gage LI401 and lower liquid
Position instrument LI402.The solid line between each device in Fig. 1 is pipeline, and the upward arrow direction of solid line is that gas is defeated
Outgoing direction, is specified that it is to be best understood from the deep-cooling nitrogen-making control system that the present embodiment provides, wherein, the
One switch controller K1, the second switch controller K2 and the 3rd switch controller K3 have logical operations function
Electronic equipment, can accept other electronic devices and components sends information, makes analysis and judges and send control signal,
In this embodiment, it is not described in detail, like function can be completed.
In this embodiment preferably, air filtration compressor 11 includes controller, chronotron, air
Compressor and self-cleaning air filter, air compressor and self-cleaning air filter can be controlled it by controller
Start or stop, the starting-up signal sent according to this controller, start air compressor, start self-cleaning simultaneously
Air filter, air compressor runs about 5 minutes under unloaded state, and chronotron sends air compressor
Loading signal, air compressor load, by air filtration compress after, by pipeline, the first valve F101,
Air after second valve F102 will filter compression flows to air precooler 12, air precooler 12
Including the first precooler 121 and the second precooler 122, the first valve F101 passes through pipeline and the first precooler
121 connect, and the second valve F102 is connected by pipeline and the second precooler 122, it is preferable that can select one
Individual one leads to two interfaces, one leads to two interfaces through first from air filtration compressor 11 pipeline out by this
Valve F101, the second valve F102 and first precooler the 121, second precooler 122 connect；Wherein first
121 main precoolers of precooler, the second precooler 122 is standby precooler, when the first precooler 121 occurs
When fault or precooling temperature are inadequate, the second precooler 122 can be started and complete to work accordingly so that this is deep
Cold nitrogen control system processed is unlikely to quit work because of precooler fault.
First escaper SL201 is by pipeline, the 3rd valve F103 and air filtration compressor 11 and air
(preferably, this pipeline is the first valve F101, the second valve F102 is to empty for pipeline between pre-cooler 12
Pipeline between gas filtration pressure compression apparatus 11) connect, wherein, the 3rd valve F103 also with the first Stress control
Element PIC301 is electrically connected with, and the first pressure control valve PIC301 is used for measuring air filtration compressor 11
With the air pressure in the pipeline between air precooler 12, and according to this air-pressure controlling the 3rd valve
The aperture of F103；First pressure control valve PIC301 is one and has the electronic equipment calculating arbitration functions,
Can be connected with communications such as computers, computer carry out programme-control, or logical operations journey can also be write
Sequence, is performed to calculate arbitration functions by itself, when monitoring air filtration compressor 11 and air precooler
When the air pressure in pipeline between 12 is more than certain pressure preset, the first pressure control valve PIC301
Control the 3rd switch F103 to open, overpressure air is discharged through the first escaper SL201, thus stable sky
The air pressure in pipeline between gas filtration pressure compression apparatus 11 and air precooler 12, meets pressure and presets
The demand of value, in this preferred embodiment, an escaper SL201 is that gas is discharged in noise reduction, it is possible to reduce noise,
The setting of this escaper SL201 automatically and efficiently ensures that air filtration compressor 11 is provided that steady pressure
Air.
Air precooler 12, enters its internal air for pre-cooling, and the air after pre-cooling is passed through pipeline
Flow to molecular sieve purification device 13；Pre-cooling switch controller 120 respectively with the first valve F101, the second valve
Door F102, first precooler the 121, second precooler 122 and temperature control component TICA101 are electrically connected with,
Temperature control component TICA101 is used for detecting air precooler 12 and by pipeline, air is flowed to molecular sieve
Air themperature in purification devices 13, and this air themperature is sent to pre-cooling switch controller 120, pre-cold cut
Changer controller 120 is for controlling the first valve F101, the switch of the second valve F102, pre-cooling switch controller
120 is pre-always according to air temperature control first precooler 121, second of temperature control component TICA101 measurement
The keying of cold 122；Temperature control component TICA101 can be a temperature sensor, pre-cooling switching control
Device 120 includes that cyclelog PLC, cyclelog PLC can write logical operations and control program, by it
Itself perform to calculate arbitration functions.If, the Air Temperature after the pre-cooling of temperature control component TICA101 monitoring
Spend 30 DEG C, when the temperature that pre-cooling switch controller 120 pre-sets is 20 DEG C, then pre-cooling switch controller 120
Control to open the second valve F102 and the second precooler 122, or the pre-cooling grade of increasing the first precooler 121,
Temperatures above value is intended merely to pre-cooling switch controller 120 function, is not that the temperature of actual deep-cooling nitrogen-making technique is wanted
Ask.Additionally pre-cooling switch controller 120 is also by monitoring the first precooler 121 working condition, such as the first precooler
121 break down, then control to open the second valve F102 and the second precooler 122 as standby, thus ensure
The reliability of the air precooler 12 of deep-cooling nitrogen-making.
Molecular sieve purification device 13 includes that molecular sieve purification controls device 131, and molecular sieve purification controls device 131
It is electrically connected with molecular sieve purification device 13, is used for controlling molecular sieve purification device 13 and works.Molecular sieve purification
Device 13 leaches impurity by after air purge, flows to air rectifying column by pipeline and through heat-exchanger rig 14
15, heat-exchanger rig 14 is used for reducing air themperature, and air rectifying column 15 is used for preparing nitrogen.
Air rectifying column includes tower portion 151 and lower tower part 152, tank gage include tank gage LI401 and under
Tank gage LI402, upper tower portion 151 and lower tower part 152 are connected by pipeline, the first regulation valve TF11, upper liquid
Position instrument LI401 and the second pressure control valve PIC302 is arranged in tower portion 151, upper tank gage LI401
The height of the liquid levels in measuring upper tower portion 151, the second pressure control valve PIC302 is used for measuring
Pressure in upper tower portion 151；Lower tank gage LI402 is arranged on lower tower part 152, and lower tank gage LI402 is used for
The height of the liquid levels in measurement lower tower part 152.First regulation valve TF11, lower tank gage LI402, second
Pressure control valve PIC302 is all electrically connected with the first switch controller K1, and the first switch controller K1 uses
Stress control first in the height and upper tower portion 151 of the liquid levels according to lower tower part 152 regulates valve TF
Regulation action, i.e. open big or turn down, such as, if the liquid level of lower tower part 152 is too high, the first switching control
Device K1 controls the first regulation valve TF11 and automatically opens greatly, is turned down by the liquid level of lower tower part 152.Upper tank gage LI401
With second switch controller K2 be electrically connected with, the bottom in upper tower portion 151 by pipeline, the 4th valve F104 with
Letdown tank 101 connects, and the 4th valve F104 is also electrically connected with upper tank gage LI401, upper tank gage LI401
Control the switch of the 4th valve F104 and discharged after the oxygen enriched liquid vaporization in upper tower portion by letdown tank 101,
Prevent carbon hydrocarbon compound in tower portion oxygen enriched liquid from assembling, through letdown tank 101, there is decompressing effect, prevent pressure
The most excessive and temperature is too low and causes staff injured.The top of lower tower part 152 is provided with nitrogen delivery outlet, should
Nitrogen delivery outlet is by pipeline and is transported to user's output port after heat-exchanger rig 14 is by nitrogen re-heat, and
Pipeline between nitrogen delivery outlet and user's output port is provided with the 5th valve F105；The top in upper tower portion 151
Being provided with dirty nitrogen delivery outlet, this dirt nitrogen delivery outlet passes through pipeline through heat-exchanger rig 14 and swell refrigeration
Device 16 connects, and wherein, the pipeline after heat-exchanger rig 14 is provided with the 6th valve F106, the 6th valve
F106 and the second switch controller K2 is electrically connected with, and the second switch controller K2 controls the 6th valve F106's
Switch, swell refrigeration device 16 by pipeline and is connected with molecular sieve purification device 13 through heat-exchanger rig 14,
For flowing to molecular sieve purification by after the dirty nitrogen swell refrigeration in upper tower portion after heat-exchanger rig 14 re-heat
The conduct regeneration source of the gas of device 13, regeneration source of the gas is used for the removal of impurity；Deep-cooling nitrogen-making system also includes the second tune
Joint valve TF12, the second regulation valve TF12 are connected with air inlet and the blowing mouth of swell refrigeration device 16 by pipeline,
Wherein, the 6th valve F106 it is separated with between at air inlet；Second regulation valve TF12 and the second pressure control valve
K2 is electrically connected with, and the second pressure control valve K2 is additionally operable to control the regulation action of the second regulation valve TF12, the
Two regulation valve TF12 can be used to balance adjustment swell refrigeration device 16, even if swell refrigeration device 16 is because of fault
And quit work, it is also possible to the second regulation valve TF12 is opened to maximum, by standby liquid supplying apparatus 17 generation
There is provided cold to heat-exchanger rig 14 for swell refrigeration device 16.
Molecular sieve purification device 13 is also associated with the 3rd escaper SL203 and the 5th pressure control valve PIC305,
3rd escaper SL203 is connected by pipeline and molecular sieve purification device 13, and the 3rd escaper SL203 is the most logical
The conveying that piping, the 13rd valve F113 are connected with through heat-exchanger rig 14 and molecular sieve purification device 13
The pipeline of dirty nitrogen connects, and wherein, the 13rd valve F113 and the 5th pressure control valve PIC305 is electrical
Connecting, the 5th pressure control valve PIC305 is for measuring through heat-exchanger rig 14 and molecular sieve purification device 13
Pressure in the pipeline of the dirty nitrogen of conveying connected, and according to dirty nitrogen Stress control the 13rd valve F113
Aperture, the 3rd escaper SL203 is for controlling the pressure balance of molecular sieve purification device 13.
Standby liquid supplying apparatus 17 includes the first output port 171 and the second output port 172, the first output
Port 171 is connected with the bottom in upper tower portion 151 and the top of lower tower part 152 by pipeline, the 7th valve F107
Connecing, the 7th valve F107 and the second switch controller K2 are electrically connected with, and the second switch controller K2 controls the
The switch of seven valve F107, for providing standby cold to air rectifying column 15；Second output port 172 leads to
Piping and user's output port connect, and on the pipeline between the second output port 172 and user's output port
Being provided with Self-driven pressure-adjusting valve group 102, this Self-driven pressure-adjusting valve group 102 is used for controlling standby liquid supplying apparatus 17
Output nitrogen break-make, it is achieved provide the user with standby nitrogen by user's output port；This standby liquid supplies
Answer device 17 to be possible not only to as providing standby cold to air rectifying column 15, simultaneously can also when the system failure,
Continue to provide standby nitrogen to client, it is ensured that client can use nitrogen incessantly.
In order to provide the nitrogen of high concentration to client, system also includes that standby is located at by analyser 18, analyser 18
Between second output port 172 and user's output port of liquid supplying apparatus 17, and with the 5th valve F105
Being electrically connected with, this analyser 18 is for measuring the oxygen content of the nitrogen flowing to user, it is ensured that be supplied to client
Oxygen content in the range of demanding criteria, analyser 18 includes two air inlet port, wherein, an air inlet port
Connected by pipeline, the 9th valve F109 and the second output port 172, another air inlet port by pipeline,
Tenth valve F110 is connected with the pipeline between heat-exchanger rig 14 and the 5th valve F105, the 9th valve
F109, the tenth valve F110 and the 3rd switch controller K3 are electrically connected with, and the 3rd switch controller K3 is used for
Control the 9th valve F109 and the switch of the tenth valve F110.
Second escaper SL202 is by pipeline, the 8th valve F108 and through heat-exchanger rig 14 and the 5th valve
Pipeline between F105 connects, and the second escaper SL202 is also had silencing function and exported by user for control
Port provides the user with the pressure size of nitrogen, it is ensured that user use nitrogen pressure in critical field, its
In, the 8th valve F108 is also electrically connected with the 3rd pressure control valve PIC303, the 3rd pressure control valve
PIC303 is used for measuring the nitrogen pressure in the pipeline between heat-exchanger rig 14 and the 5th valve F105, and
According to this nitrogen pressure control the 8th valve F108 aperture, thus realize control by user's output port to
User provides the pressure size of nitrogen.
In this preferred embodiment, the valve of deep-cooling nitrogen-making control system all uses operated pneumatic valve, by instrument supply gas
Source apparatus 19 provides, and wherein, operated pneumatic valve aperture refers to the scope between valve switch, is used for controlling flow
Size.Instrument air device 19 is by pipeline, the 12nd valve F112 and standby liquid supplying apparatus 17
The second output port 172 connect, instrument air device 19 also by pipeline, the 11st valve F111 with point
Airflow pipe between son sieve purification devices 13 and heat-exchanger rig 14 connects, wherein, and the 12nd valve F112
Being electrically connected with the 4th pressure control valve PIC304, the 4th pressure control valve PIC304 is used for measuring molecule
The air pressure in airflow pipe between sieve purification devices 13 and heat-exchanger rig 14, and according to this air
The switch of air-pressure controlling the 12nd valve F112 in conveyance conduit, instrument air device 19 is this deep cooling
The valve of nitrogen control system processed provides power gas source.
To sum up, this deep-cooling nitrogen-making control system, by air filtration compressor, air precooler, pre-cold cut
Changer controller, temperature control component, molecular sieve purification device, heat-exchanger rig, air rectifying column, swell refrigeration
Device, standby liquid supplying apparatus and analyser etc., connected by pipeline and valve, utilizing switch controller
Automatically control with pressure control valve, or make connection of computerizeing control, by each in whole system
Orderly combining between device, is controlled as an entirety, it is achieved deep-cooling nitrogen-making fully automated
Change, saved cost and the time of deep-cooling nitrogen-making technique.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all in the present invention
Spirit and principle within any amendment, equivalent and the improvement etc. made, should be included in the guarantor of the present invention
Within the scope of protecting.
Claims (8)
1. a deep-cooling nitrogen-making control system, it is characterised in that including: air filtration compressor, air are pre-
Device for cooling, pre-cooling switch controller, temperature control component, molecular sieve purification device, heat-exchanger rig, air essence
Evaporate tower, swell refrigeration device, standby liquid supplying apparatus, the first switch controller, the second switch controller,
3rd switch controller, letdown tank, the first escaper, the second escaper, the first pressure control valve, second
Pressure control valve, the 3rd pressure control valve, the first regulation valve and tank gage；
After air filtration is compressed by described air filtration compressor, by pipeline, the first valve, the second valve
Flowing to described air precooler, described air precooler includes the first precooler and the second precooler, institute
Stating the first valve to be connected with described first precooler by pipeline, described second valve passes through pipeline and described second
Precooler connects；
Described first escaper is pre-with described air filtration compressor and described air by pipeline, the 3rd valve
Pipeline between device for cooling connects, and wherein, the 3rd valve is also electrically connected with described first pressure control valve,
Described first pressure control valve be used for measuring described air filtration compressor and described air precooler it
Between pipeline in air pressure, and according to the aperture of the 3rd valve described in described air-pressure controlling；
Described air precooler, for entering institute by described first precooler and/or the second precooler pre-cooling
State the air within air precooler, and the air after pre-cooling is flowed to described molecular sieve purification by pipeline
Device；
Described pre-cooling switch controller respectively with described first valve, the second valve, the first precooler, second pre-
Cold and temperature control component are electrically connected with, and described temperature control component is used for detecting described air precooler will
Air flows to the air themperature in described molecular sieve purification device by pipeline, and described air themperature is sent
To described pre-cooling switch controller, described pre-cooling switch controller is used for controlling described first valve, the second valve
Switch, described pre-cooling switch controller is always according to the first precooler described in described air temperature control, second pre-
The keying of cold；
Described molecular sieve purification device, by after air purge, flows to institute by pipeline and through described heat-exchanger rig
Stating air rectifying column, described heat-exchanger rig is used for reducing air themperature, and described air rectifying column is used for preparing nitrogen；
Described air rectifying column includes that tower portion and lower tower part, described tank gage include tank gage and lower liquid level
Instrument, described upper tower portion and described lower tower part are connected by pipeline, the first regulation valve, described upper tank gage and described
Second pressure control valve is arranged on described upper tower portion, and described upper tank gage is for measuring the liquid in described upper tower portion
The height in body fluid face, described second pressure control valve is for measuring the pressure in tower portion, described lower tank gage
Being arranged on described lower tower part, described lower tank gage is for measuring the height of the liquid levels in described lower tower part, institute
State the first regulation valve, lower tank gage, the second pressure control valve to be all electrically connected with described first switch controller,
Described first switch controller pressure in the height and upper tower portion of the liquid levels according to described lower tower part
Controlling the regulation action of described first regulation valve, described upper tank gage and described second switch controller electrically connect
Connecing, the bottom in described upper tower portion is connected with described letdown tank by pipeline, the 4th valve, and described 4th valve is also
Being electrically connected with described upper tank gage, described upper tank gage controls the switch pair of described 4th valve and puts tower portion
Oxygen enriched liquid, and diffuse after vaporization in letdown tank, the top of described lower tower part is provided with nitrogen delivery outlet, described
Nitrogen is transported to user's output port by pipeline and through described heat-exchanger rig by nitrogen delivery outlet, and nitrogen is defeated
Pipeline between outlet and described user's output port is provided with the 5th valve；
The top in described upper tower portion is provided with dirty nitrogen delivery outlet, and described dirty nitrogen delivery outlet is passed through by pipeline
Described heat-exchanger rig is connected with described swell refrigeration device, wherein, and described pipeline after described heat-exchanger rig
It is provided with the 6th valve, described 6th valve and described second switch controller to be electrically connected with, described second switching
Controller controls the switch of described 6th valve, and described swell refrigeration device fills by pipeline and through described heat exchange
Put and be connected with described molecular sieve purification device, for changing through described after the dirty nitrogen swell refrigeration in upper tower portion
The conduct regeneration source of the gas of described molecular sieve purification device is flowed to after thermal re-heat；
Described standby liquid supplying apparatus includes the first output port and the second output port, described first outfan
Mouth is connected with the described bottom in upper tower portion and the top of described lower tower part by pipeline, the 7th valve, and the described 7th
Valve is electrically connected with described second switch controller, and described second switch controller controls described 7th valve
Switch, for providing standby cold to described air rectifying column；Described second output port passes through pipeline and user
Output port connects, and the pipeline between described second output port and described user's output port is provided with and relies on oneself
Formula pressure regulator valve group, described Self-driven pressure-adjusting valve group is for controlling the output nitrogen of described standby liquid supplying apparatus
Break-make, it is achieved provide the user with standby nitrogen by described user's output port；
Described second escaper by pipeline, the 8th valve with described through heat-exchanger rig and described 5th valve it
Between pipeline connect, described second escaper for control provide the user with nitrogen by described user's output port
Pressure, wherein, the 8th valve also with described 3rd pressure control valve be electrically connected with, described 3rd pressure control
Element processed is used for measuring the nitrogen pressure in described pipeline through heat-exchanger rig and between described 5th valve, and
The aperture of described 8th valve is controlled according to described nitrogen pressure.
Deep-cooling nitrogen-making control system the most according to claim 1, it is characterised in that described system also includes
One analyser, the second output port of described standby liquid supplying apparatus is located at by described analyser and described user is defeated
Going out between port, and be electrically connected with described 5th valve, described analyser flows to the nitrogen of user for measuring
The oxygen content of gas, described analyser includes two air inlet port, wherein, an air inlet port by pipeline, the 9th
Valve is connected with described second output port, and another air inlet port is changed with described process by pipeline, the tenth valve
Pipeline between thermal and described 5th valve connects, and described 9th valve, the tenth valve are cut with the described 3rd
Changer controller is electrically connected with, and described 3rd switch controller is for controlling opening of described 9th valve and the tenth valve
Close.
Deep-cooling nitrogen-making control system the most according to claim 1 and 2, it is characterised in that described system is also
Including instrument air device and the 4th pressure control valve, described instrument air device passes through pipeline, the 12nd valve
Door is connected with the second output port of described standby liquid supplying apparatus, and described instrument air device is also by pipe
Airflow pipe between road, the 11st valve and described molecular sieve purification device and described heat-exchanger rig is even
Connecing, wherein, described 12nd valve is electrically connected with described 4th pressure control valve, described 4th pressure control
Element processed is for measuring in the airflow pipe between described molecular sieve purification device and described heat-exchanger rig
Air pressure, and according to the switch of the 12nd valve described in the air-pressure controlling in described airflow pipe,
Valve that described instrument air device is described deep-cooling nitrogen-making control system provides power gas source, wherein, described deeply
The valve of cold nitrogen control system processed is operated pneumatic valve.
Deep-cooling nitrogen-making control system the most according to claim 3, it is characterised in that described system also includes
3rd escaper and the 5th pressure control valve, described 3rd escaper is filled by pipeline and described molecular sieve purification
Put connection, described 3rd escaper also by pipeline, the 13rd valve with through described heat-exchanger rig and described point
The pipeline of the dirty nitrogen of conveying that son sieve purification devices connects connects, wherein, and described 13rd valve and described the
Five pressure control valves are electrically connected with, and described 5th pressure control valve is used for measuring and described fills through described heat exchange
Put and the dirty nitrogen pressure in the pipeline of the conveying dirt nitrogen of described molecular sieve purification device connection, and according to
The aperture of the 13rd valve described in described dirty nitrogen Stress control, described 3rd escaper is used for controlling described point
Son sieve purification devices regeneration gas pressure balance.
Deep-cooling nitrogen-making control system the most according to claim 4, it is characterised in that described system also includes
Second regulation valve, described second regulation valve is connected by air inlet and the blowing mouth of pipeline with described swell refrigeration device
Connecing, wherein, at described air inlet, there is described 6th valve at interval；
Described second regulation valve is electrically connected with described second pressure control valve, described second pressure control valve
It is additionally operable to control the regulation action of the second regulation valve.
Deep-cooling nitrogen-making control system the most according to claim 5, it is characterised in that described system also includes
Molecular sieve purification controls device, and described molecular sieve purification controls device and described molecular sieve purification device electrically connects
Connect, be used for controlling the work of described molecular sieve purification device.
Deep-cooling nitrogen-making control system the most according to claim 6, it is characterised in that described system also includes
Computer, described pre-cooling switch controller, the first switch controller, the second switch controller, the 3rd switching control
Device processed and molecular sieve purification control device and are all connected with described computer communication.
Deep-cooling nitrogen-making control system the most according to claim 7, it is characterised in that described pre-cooling switching control
Device processed includes cyclelog PLC, the described cyclelog PLC measurement institute according to described temperature control component
State the first precooler described in air temperature control and the keying of the second precooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322386.7A CN105928319A (en) | 2016-05-13 | 2016-05-13 | Cryogenic nitrogen generation control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322386.7A CN105928319A (en) | 2016-05-13 | 2016-05-13 | Cryogenic nitrogen generation control system |
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| CN105928319A true CN105928319A (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610322386.7A Pending CN105928319A (en) | 2016-05-13 | 2016-05-13 | Cryogenic nitrogen generation control system |
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