CN104142044A - Modular argon recovery liquefier and argon recovery method - Google Patents
Modular argon recovery liquefier and argon recovery method Download PDFInfo
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- CN104142044A CN104142044A CN201410381829.0A CN201410381829A CN104142044A CN 104142044 A CN104142044 A CN 104142044A CN 201410381829 A CN201410381829 A CN 201410381829A CN 104142044 A CN104142044 A CN 104142044A
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- argon
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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
- F25J3/04248—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
- F25J3/0429—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 of feed air, e.g. used as waste or product air or expanded into an auxiliary column
- F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
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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
- F25J3/04406—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 dual pressure main column system
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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
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04654—Producing crude argon in a crude argon column
- F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
- F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
- F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
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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
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04654—Producing crude argon in a crude argon column
- F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
- F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
- F25J3/04703—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser being arranged in more than one vessel
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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
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04721—Producing pure argon, e.g. recovered from a crude argon column
- F25J3/04727—Producing pure argon, e.g. recovered from a crude argon column using an auxiliary pure argon column for nitrogen rejection
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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
- F25J3/04969—Retrofitting or revamping of an existing air fractionation unit
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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
- F25J2210/58—Argon
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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
- F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
- F25J2235/58—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being argon or crude argon
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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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/58—Processes or apparatus involving steps for recycling of process streams the recycled stream being argon or crude argon
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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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/90—Processes or apparatus involving steps for recycling of process streams the recycled stream being boil-off gas from storage
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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
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/42—One fluid being 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
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/58—One fluid being argon or crude argon
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention provides a modular argon recovery liquefier and an argon recovery method. The modular argon recovery liquefier comprises a liquefier body internally provided with a plate type heat exchange core. The interior of the liquefier body is partitioned into an upper cavity and a lower cavity through the plate type heat exchange core, and the plate type heat exchange core is vertically and upwards arranged in the upper cavity. One side of the middle of the upper cavity is provided with a liquid nitrogen inlet, and the top or the upper portion of the liquefier body is provided with a nitrogen outlet communicated with the upper cavity. One side of the lower portion of the upper cavity is provided with a liquid nitrogen outlet. One side of the upper portion of the lower cavity is provided with an argon inlet, the bottom of the liquefier body is provided with a liquid argon outlet communicated with the lower cavity, the top of the plate type heat exchange core is provided with a non-condensable gas blowdown opening communicated with the lower cavity. One side wall of the upper cavity is provided with an upper valve connector and a lower valve connector which are connected with the same liquid level indicator, the side wall of the upper cavity and the side wall of the lower cavity are further provided with connectors which are connected with an upper intelligent pressure meter and a lower intelligent pressure meter which are capable of reading pressure signals and transmitting the pressure signals to the correspondingly-connected automatic control valves respectively. The modular argon recovery liquefier is independent in structure, reliable in operation, capable of recovering lost argon such as storage tank argon exhaust, argon pump exhaust and raffinate evaporation gas, and economical efficiency of argon preparation is improved.
Description
Technical field
What the present invention relates to is that a kind of argon reclaims liquefier and argon recovery method, especially a kind of argon that can form a standalone module reclaims liquefier and argon recovery method, be mainly used in the sky minute flow process of full distillation non hydrogen argon processed, be to reclaim and liquiefied product argon gas be take and again participated in the air separation plant that argon rectifying is object, the follow-up argon belonging in air separation rectifying argon making process reclaims auxiliary process.
Background technology
Air separation plant full distillation non hydrogen argon processed is the current comparatively argon mode processed of main flow, and its common process flow process as shown in Figure 1.From oxygen nitrogen rectifying king-tower, gas phase argon cut (containing argon 8% ~ 10%) is extracted in tower C2 appropriate location, enters crude argon column and carries out rectifying.Because the theoretical cam curve of this technological requirement crude argon column is more, tower height is unfavorable for the assurance of installation and transportation and perpendicularity, so conventionally crude argon column is divided into two sections of crude argon column I C701 and crude argon column II C702.The crude argon that liquid air after subcooler E2 liquefies and rises in crude argon column II in the crude argon condenser K702 at crude argon column II top, most of condensate liquid is as phegma backflow crude argon column II.The crude argon not being condensed enters pure argon column C703 middle part and carries out the separated of argon and nitrogen, finally in the pure argon evaporator K704 of pure argon column bottom, obtains highly purified product liquid argon.
Yet the aerial content of argon is 0.932%, general empty minute to the recovery rate of argon 70% ~ 90%, namely a set of air separation plant that can process 10000 mark side's air capacities can only be produced the product argon of approximately 70 mark sides.Therefore, the production cost of argon and specific energy consumption are appreciable.In addition argon process control processed is debugged relative oxygen nitrogen and is wanted complicated, and argon gas has requisite use in welding, steel-making, semiconductor manufacture etc. field, so argon was also once becoming the product source of the gas of high economy.
But on the other hand, product argon is stored at storage tank, due to the pressure control requirement of storage tank itself and the existence of evaporation rate, a part of product argon gas unavoidably can run off.Also have, in the back-up system of product argon is used, as the precooling pump housing, pipeline, the discharge of cryogenic pump gas, raffinate loss etc. all can cause the waste of a part of product argon.
So, at air separation unit, consume mass energy and extract argon, and in the situation of argon relation between market supply and demand anxiety, the loss of this product argon is from the viewpoint of economy or is all not enough to some extent from the consideration of design angle.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, and provide a kind of, can simply incorporate in former technological process, effectively the argon gas of emptying waste is reclaimed again and utilized, make itself and former flow process relatively independent, install and control the dexterous victory in Turin, the modularization argon that security is good reclaims liquefier and argon recovery method.
The object of the invention is to complete by following technical solution, a kind of modular argon reclaims liquefier, it comprises the liquefaction body that is provided with plate-type heat-exchange core body in, in described liquefaction body, by described plate-type heat-exchange core body, be divided into epicoele and cavity of resorption, and plate-type heat-exchange core body is arranged in epicoele vertically upward; Middle part one side of described epicoele is provided with liquid nitrogen import, and top or the top of liquefaction body are provided with the nitrogen outlet that is communicated with epicoele; Bottom one side of epicoele is provided with liquid nitrogen outlet;
Described cavity of resorption top one side is provided with argon gas import, and the bottom of liquefaction body is provided with the liquid argon outlet that is communicated with cavity of resorption, and at the top of plate-type heat-exchange core body, is provided with the fixed gas blowing mouthful that is communicated with cavity of resorption;
On one sidewall of described epicoele, be provided with upper and lower two valve interfaces that are connected with same liquid level meter, on the sidewall of described epicoele and cavity of resorption, be also provided with respectively and be respectively connected in one and can read pressure signal and transfer to the interface of upper the Intelligent Manometer and the lower the Intelligent Manometer of the autocontrol valve that is connected separately.
Argon gas import of the present invention is connected in argon gas storage tank by an argon gas stop valve and/or argon gas check-valves and connecting pipe; Described liquid argon outlet connects liquid argon by a liquid argon stop valve and goes out pipe, and in the front portion of liquid argon stop valve, is provided with the argon analysis measuring point of a connection argon analyzer;
The fixed gas that described plate-type heat-exchange core body top arranges blows down mouth and connects residual air delivery pipe by a discharge line valve;
Described liquid nitrogen import connects liquid nitrogen storage tank or liquid nitrogen source by a liquid nitrogen autocontrol valve, and described autocontrol valve is connected with the lower the Intelligent Manometer in cavity of resorption;
Described nitrogen outlet connects the externally defeated tube connector of row by connecting a nitrogen autocontrol valve, and described nitrogen autocontrol valve is connected with the upper the Intelligent Manometer in epicoele;
The liquid nitrogen outlet that described epicoele arranges is by a discharge opeing stop valve connected drainage pipe.
The liquid nitrogen vaporization passage that is arranged in epicoele in described plate-type heat-exchange core body is single laying up interposed structure with the argon gas condensation channel that is arranged in cavity of resorption.
Utilize above-mentioned modular argon to reclaim the method that liquefier carries out argon recovery, described method mainly comprises following operation:
Argon gas enters the cavity of resorption of the liquefaction body in argon recycling module through argon gas check-valves Vg and stop valve Vc; Liquid nitrogen inlet valve Vb adjusts aperture according to the pressure P I1 of cavity of resorption the Intelligent Manometer simultaneously, the liquid nitrogen of suitable flow is entered in liquefaction body epicoele, in epicoele, set up suitable liquid nitrogen liquid level LI, plate-type heat-exchange core body major part is immersed in liquid nitrogen, thereby makes the argon passage of heat exchange body and liquid nitrogen form a rational heat exchange area;
After recovery argon gas liquefies in heat exchange core body, flowing into cavity of resorption bottom gathers, by the analysis measuring point to argon, liquid argon is carried out to purity analysis, and be handled as follows according to the purity of surveyed argon: (1) argon purity still, within the scope of the purity requirement of product argon, now can directly reclaim into storage tank as product reclaiming liquid argon; (2) argon purity is because the different reasons such as the micro-leakage of pipeline are lower than the pureness specifications of product, but argon content still relatively high (as >80%) now can enter crude argon column II and again carry out argon rectifying.
The nitrogen that in liquefaction body epicoele of the present invention, evaporation produces can be entered in dirty nitrogen pipe and be participated in flow process heat exchange by autocontrol valve, further reclaim its cold, and described autocontrol valve aperture can the upper the Intelligent Manometer in epicoele records evaporation side pressure and controls; In addition, in removal process, can open fixed gas that board-like heat exchange core body top arranges blows down the discharge line valve that mouth joins and carries out residual air discharge in good time; Also can open the discharge opeing stop valve that the liquid nitrogen outlet of epicoele setting joins in good time and carry out discharge opeing.
The selectable recovery product of the present invention argon, reduces because the argon in operating process runs off; Be mainly used in the sky minute flow process of full distillation non hydrogen argon processed, a recycling module as a whole, can be placed in ice chest, also can be independent of skid outside ice chest, can be reliably to the argon gas recovery of liquefying.
The present invention can simply incorporate in former technological process, effectively the argon gas of emptying waste is reclaimed again and is utilized; Modular design makes itself and former flow process relatively independent, installs and control the dexterous victory in Turin, and simple flowage structure has also guaranteed the security of this module, is a kind of good argon retracting device.
Accompanying drawing explanation
Fig. 1 is the space division technique schematic flow sheet that adds argon recycling module of existing routine.
Fig. 2 is the structural representation that argon of the present invention reclaims liquefier.
Fig. 3 is argon recycling module schematic flow sheet of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention will be described in detail: shown in Fig. 2, a kind of modularization argon of the present invention reclaims liquefier, it comprises the liquefaction body 2 that is provided with plate-type heat-exchange core body 1 in, in described liquefaction body 2, by described plate-type heat-exchange core body 1, be divided into epicoele 3 and cavity of resorption 4, and plate-type heat-exchange core body 1 is arranged in epicoele 3 vertically upward; Middle part one side of described epicoele 3 is provided with liquid nitrogen import 5, and top or the top of liquefaction body 2 are provided with the nitrogen outlet 6 that is communicated with epicoele 3; Bottom one side of epicoele 3 is provided with liquid nitrogen outlet 7;
Described cavity of resorption 4 top one sides are provided with argon gas import 8, and the bottom of the body 2 that liquefies is provided with the liquid argon outlet 9 that is communicated with cavity of resorption 4, and at the top of plate-type heat-exchange core body 1, is provided with the fixed gas blowing mouth 10 that is communicated with cavity of resorption 4;
On one sidewall of described epicoele 3, be provided with upper and lower two valve interfaces 12,13 that are connected with same liquid level meter 11, on the sidewall of described epicoele 3 and cavity of resorption 4, be also provided with respectively and be respectively connected in one and can read pressure signal and transfer to the upper the Intelligent Manometer of the autocontrol valve that is connected separately and the interface of lower the Intelligent Manometer 14,15.
Shown in Fig. 3, described argon gas import 8 is connected in argon gas storage tank by an argon gas stop valve Vc and/or argon gas check-valves Vg and connecting pipe; Described liquid argon outlet 9 connects liquid argon by a liquid argon stop valve Vd and goes out pipe, and in the front portion of liquid argon stop valve Vd, is provided with the argon analysis measuring point Al of a connection argon analyzer;
The fixed gas that described plate-type heat-exchange core body 1 top arranges blows down mouth 10 and connects residual air delivery pipe by a discharge line valve Vf;
Described liquid nitrogen import 5 connects liquid nitrogen storage tank or liquid nitrogen source by a liquid nitrogen autocontrol valve Va, and described autocontrol valve Va is connected with the lower the Intelligent Manometer in cavity of resorption 4;
Described nitrogen outlet 6 connects the externally defeated tube connector of row by connecting a nitrogen autocontrol valve Vb, and described nitrogen autocontrol valve Vb is connected with the upper the Intelligent Manometer in epicoele 3;
The liquid nitrogen outlet 7 that described epicoele 3 arranges is by a discharge opeing stop valve Ve connected drainage pipe.
The liquid nitrogen vaporization passage that is arranged in epicoele 3 in plate-type heat-exchange core body 1 of the present invention is single laying up interposed structure with the argon gas condensation channel that is arranged in cavity of resorption 4.
Shown in Fig. 3 is the overall flow of argon retracting device module, having shown in figure:
Va is that liquid nitrogen enters liquefier control valve;
Vb is the rear nitrogen outlet control valve of evaporation;
Vc enters liquefier stop valve for reclaiming argon gas;
Vd is the recovery argon outlet shutoff valve after liquefying;
Ve is the drainage with liquid nitrogen valve of liquefier epicoele;
Vf be cannot condensation in heat exchanger residual air drain valve;
Vg is the check-valves of argon gas inlet pipeline, guarantees the one-way of technological process;
PSV1 is liquefier condensation side safety valve, guarantees liquefier cavity of resorption pressure security;
PSV2 is liquefier evaporation side safety valve, guarantees liquefier upper cavity pressure safety;
LI is the liquid nitrogen liquid level indication of liquefier epicoele;
AI is for reclaiming the purity analysis after argon gas liquefaction;
PI1 is the indication of liquefier condensation side pressure, can to Va, regulate by this pressure, if PI1 departs from normal value, when numerical value is larger, can control out large Va valve, increase liquid nitrogen inlet, increase the liquefaction of gas argon, make PI1 value recover normal value, otherwise turn down Va valve;
PI2 is the indication of liquefier evaporation side pressure, can to Vb, regulate by this pressure, if PI2 departs from normal value, when numerical value is larger, can control out large Vb valve, increases evaporation nitrogen discharge rate, makes PI2 value recover normal value, otherwise turns down Va valve;
Need the argon gas reclaiming to enter liquefier K705 cavity of resorption through Vc valve, argon gas rises to argon passage in board-like core body in container, carry out heat exchange with the liquid nitrogen as low-temperature receiver, be liquefied as after liquid argon and accumulate in cavity of resorption bottom, by Vd valve, can be discharged to required technological process position; The liquid nitrogen that the external world provides enters liquefier K705 epicoele through Va autocontrol valve, after being vaporized, through Vb automatic valve, discharges by argon gas.
Utilize above-mentioned modularization argon to reclaim the method that liquefier carries out argon recovery, the method mainly comprises following operation:
Argon gas enters the cavity of resorption of the liquefaction body in argon recycling module through argon gas check-valves Vg and stop valve Vc; Liquid nitrogen inlet valve Vb adjusts aperture according to the pressure P I1 of cavity of resorption the Intelligent Manometer simultaneously, the liquid nitrogen of suitable flow is entered in liquefaction body epicoele, in epicoele, set up suitable liquid nitrogen liquid level LI, plate-type heat-exchange core body major part is immersed in liquid nitrogen, thereby makes the argon passage of heat exchange body and liquid nitrogen form a rational heat exchange area;
After recovery argon gas liquefies in heat exchange core body, flowing into cavity of resorption bottom gathers, by the analysis measuring point to argon, liquid argon is carried out to purity analysis, and be handled as follows according to the purity of surveyed argon: (1) argon purity still, within the scope of the purity requirement of product argon, now can directly reclaim into storage tank as product reclaiming liquid argon; (2) argon purity is because the different reasons such as the micro-leakage of pipeline are lower than the pureness specifications of product, but argon content still relatively high (as >80%) now can enter crude argon column II and again carry out argon rectifying.
The nitrogen that in described liquefaction body epicoele, evaporation produces can be entered in dirty nitrogen pipe and be participated in flow process heat exchange by autocontrol valve Vb, further reclaim its cold, and described autocontrol valve Vb aperture can the upper the Intelligent Manometer in epicoele records evaporation side pressure P I2 and controls; In addition, in removal process, can open fixed gas that board-like heat exchange core body top arranges blows down the discharge line valve that mouth joins and carries out residual air discharge in good time; Also can open the discharge opeing stop valve that the liquid nitrogen outlet of epicoele setting joins in good time and carry out discharge opeing.
Embodiment:
Exhaust when recovery argon gas be take the control of storage tank pressure is example, in conjunction with Fig. 1,3.Higher when storage tank pressure, the control valve of cell body itself is opened, and part argon gas is discharged cell body, through check-valves Vg and inlet valve Vc, enters the argon recovery liquefier K705 cavity of resorption in argon recycling module; Liquid nitrogen inlet valve Vb adjusts aperture according to cavity of resorption pressure P I1 simultaneously, the liquid nitrogen of suitable flow is entered in liquefier epicoele, in epicoele, set up suitable liquid nitrogen liquid level LI, the core body of plate type heat exchanger is partially immersed in liquid nitrogen, thereby makes the argon passage of heat exchanger and liquid nitrogen form a rational heat exchange area.Liquid nitrogen as low-temperature receiver can be provided by extraneous storage tank, also can in technological process, lead cold liquid nitrogen (needing flow process to calculate) is provided.
After recovery argon gas liquefies in heat exchanger core body, flow into cavity of resorption bottom and gather, can to liquid argon, carry out purity analysis by the analysis measuring point to AI.Now there are two kinds of situations: (1) argon purity still, within the scope of the purity requirement of product argon, now can directly reclaim into storage tank as product reclaiming liquid argon.(2) argon purity is because the different reasons such as the micro-leakage of pipeline are lower than the pureness specifications of product, but argon content still relatively high (as >80%) now can enter crude argon column II and again carry out argon rectifying.
Meanwhile, the nitrogen that evaporation produces can be entered in dirty nitrogen pipe and be participated in flow process heat exchange by Vb valve, further reclaims its cold, and Vc valve opening can be controlled by evaporation side pressure P I2.In addition, in module, can open residual air drain valve Vf and tapping valve Ve in good time, avoid affecting the heat transfer effect of liquefier.
Whole module is centered by liquefier K705, and each valve regulates and controls in time according to working conditions change, makes module operation simple and reliable.And compared to traditional argon recovery line (argon gas directly enters K704 and reclaims), this argon recycling module is more conducive to the recovery of atmospheric storage tank low-pressure argon.Tradition way of recycling there will be the hypotony due to recovery argon gas to cause it cannot enter situation about reclaiming in K704, and this recycling module can liquefy with lower condensing pressure in K705, has greatly improved the recovering effect of atmospheric storage tank gas.
In addition, due to the independence of argon recycling module, this module of start-stop is also more flexible, cuts off terminal valve and just can cut off and the contacting of technological process, and technological process is affected also less, can determine putting into operation of this module according to the economy of market argon.
Claims (5)
1. modular argon reclaims a liquefier, and it comprises the liquefaction body that is provided with plate-type heat-exchange core body in, be divided into epicoele and cavity of resorption, and plate-type heat-exchange core body is arranged in epicoele vertically upward in described liquefaction body by described plate-type heat-exchange core body; Middle part one side of described epicoele is provided with liquid nitrogen import, and top or the top of liquefaction body are provided with the nitrogen outlet that is communicated with epicoele; Bottom one side of epicoele is provided with liquid nitrogen outlet;
Described cavity of resorption top one side is provided with argon gas import, and the bottom of liquefaction body is provided with the liquid argon outlet that is communicated with cavity of resorption, and at the top of plate-type heat-exchange core body, is provided with the fixed gas blowing mouthful that is communicated with cavity of resorption;
On one sidewall of described epicoele, be provided with upper and lower two valve interfaces that are connected with same liquid level meter, on the sidewall of described epicoele and cavity of resorption, be also provided with respectively and be respectively connected in one and can read pressure signal and transfer to the interface of upper the Intelligent Manometer and the lower the Intelligent Manometer of the autocontrol valve that is connected separately.
2. modular argon according to claim 1 reclaims liquefier, it is characterized in that described argon gas import is connected in argon gas storage tank by an argon gas stop valve and/or argon gas check-valves and connecting pipe; Described liquid argon outlet connects liquid argon by a liquid argon stop valve and goes out pipe, and in the front portion of liquid argon stop valve, is provided with the argon analysis measuring point of a connection argon analyzer;
The fixed gas that described plate-type heat-exchange core body top arranges blows down mouth and connects residual air delivery pipe by a discharge line valve;
Described liquid nitrogen import connects liquid nitrogen storage tank or liquid nitrogen source by a liquid nitrogen autocontrol valve, and described autocontrol valve is connected with the lower the Intelligent Manometer in cavity of resorption;
Described nitrogen outlet connects the externally defeated tube connector of row by connecting a nitrogen autocontrol valve, and described nitrogen autocontrol valve is connected with the upper the Intelligent Manometer in epicoele;
The liquid nitrogen outlet that described epicoele arranges is by a discharge opeing stop valve connected drainage pipe.
3. modular argon according to claim 1 reclaims liquefier, it is characterized in that the liquid nitrogen vaporization passage that is arranged in epicoele in described plate-type heat-exchange core body is single laying up interposed structure with the argon gas condensation channel that is arranged in cavity of resorption.
4. utilize modular argon described in claim 1 or 2 or 3 to reclaim the method that liquefier carries out argon recovery, it is characterized in that described method mainly comprises following operation:
Argon gas enters the cavity of resorption of the liquefaction body in argon recycling module through argon gas check-valves Vg and stop valve Vc; Liquid nitrogen inlet valve Vb adjusts aperture according to the pressure P I1 of cavity of resorption the Intelligent Manometer simultaneously, the liquid nitrogen of suitable flow is entered in liquefaction body epicoele, in epicoele, set up suitable liquid nitrogen liquid level LI, plate-type heat-exchange core body major part is immersed in liquid nitrogen, thereby makes the argon passage of heat exchange body and liquid nitrogen form a rational heat exchange area;
After recovery argon gas liquefies in heat exchange core body, flowing into cavity of resorption bottom gathers, by the analysis measuring point to argon, liquid argon is carried out to purity analysis, and be handled as follows according to the purity of surveyed argon: (1) argon purity still, within the scope of the purity requirement of product argon, now can directly reclaim into storage tank as product reclaiming liquid argon; (2) argon purity is because the different reasons such as the micro-leakage of pipeline are lower than the pureness specifications of product, but argon content still relatively high (as >80%) now can enter crude argon column II and again carry out argon rectifying.
5. the method that argon according to claim 4 reclaims, it is characterized in that the nitrogen that in described liquefaction body epicoele, evaporation produces can be entered in dirty nitrogen pipe and be participated in flow process heat exchange by autocontrol valve Vb, further reclaim its cold, and described autocontrol valve Vb aperture can the upper the Intelligent Manometer in epicoele records evaporation side pressure P I2 and controls; In addition, in removal process, can open fixed gas that board-like heat exchange core body top arranges blows down the discharge line valve that mouth joins and carries out residual air discharge in good time; Also can open the discharge opeing stop valve that the liquid nitrogen outlet of epicoele setting joins in good time and carry out discharge opeing.
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| CN104501530A (en) * | 2014-12-25 | 2015-04-08 | 杭州杭氧股份有限公司 | Device and method for extracting high-purity liquid argon from crude argon prepared by multiple sets of air separators |
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| CN108413245A (en) * | 2018-05-24 | 2018-08-17 | 浙江智海化工设备工程有限公司 | Compressed gas recovery system and recovery method in a kind of cryogenic liquid transport tank car |
| CN109425197A (en) * | 2017-08-26 | 2019-03-05 | 镇江严彦气体有限公司 | A kind of argon gas recover device |
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