CN212902243U - Low-pressure single-cycle expansion air separation device - Google Patents

Low-pressure single-cycle expansion air separation device Download PDF

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Publication number
CN212902243U
CN212902243U CN202021753468.5U CN202021753468U CN212902243U CN 212902243 U CN212902243 U CN 212902243U CN 202021753468 U CN202021753468 U CN 202021753468U CN 212902243 U CN212902243 U CN 212902243U
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CN
China
Prior art keywords
passageway
box
oxygen
air separation
box body
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CN202021753468.5U
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Chinese (zh)
Inventor
孙记章
谷春征
徐豪
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Kaifeng Huanghe Air Separation Group Co ltd
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Kaifeng Huanghe Air Separation Group Co ltd
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Priority to CN202021753468.5U priority Critical patent/CN212902243U/en
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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
    • F25J3/04296—Claude expansion, i.e. expanded into the main or high pressure column
    • 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
    • F25J3/044—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
    • 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
    • F25J3/0489—Modularity and arrangement of parts of the air fractionation unit, in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
    • 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
    • F25J3/04945—Details of internal structure; insulation and housing of the cold box
    • 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
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step

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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 utility model relates to an air separation plant technical field specifically is an expanded air separation plant of low pressure single cycle, the device comprises a device body, the device body includes the base, the top of base is provided with the box, the one end of box is provided with the install bin, the inlet scoop has been seted up on the top of install bin, the inside of install bin is provided with air compressor. The utility model discloses an air throttle valve carries out the rectification in sending into the rectifying tube through oxygen-enriched liquid passageway and liquid nitrogen passageway respectively to the gas of cooling and liquefaction, then has nitrogen gas passageway and oxygen passageway to carry out outside transport again, and the rectifying tube divide into two-layer from top to bottom, can carry out the rectification respectively to oxygen and nitrogen gas, makes more abundant that its rectification was drawed, has increased the efficiency of drawing.

Description

Low-pressure single-cycle expansion air separation device
Technical Field
The utility model relates to an air separation plant technical field specifically is an expanded air separation plant of low pressure single cycle.
Background
An air separation plant is simply a set of industrial facilities for separating the component gases in air to produce oxygen and nitrogen, and in general, an air separation plant refers to a separation plant for separating various air components in a chemical plant.
The existing air separation device adopts a separated type gas, the internal rectifying tower of the existing air separation device cannot fully utilize expansion air to achieve sufficient extraction rate of oxygen and nitrogen, so that the efficiency of extracting oxygen and nitrogen is low, and the device cannot fully play a role, therefore, the air separation device with low pressure and single cycle expansion needs to be designed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an expanded air separation plant of low pressure single cycle to solve the disconnect-type of current air separation plant to gas that proposes in the above-mentioned background art, its inside rectifying column can not be abundant utilize the inflation air to reach sufficient extraction rate to oxygen and nitrogen gas, thereby make the inefficiency of drawing oxygen and nitrogen gas, make the problem of the not abundant performance of device.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a low pressure single cycle expanded air separation plant, includes the device body, the device body includes the base, the top of base is provided with the box, the one end of box is provided with the install bin, the inlet scoop has been seted up on the top of install bin, the inside of install bin is provided with air compressor, the one end that the box just extended to the box inside is passed to molecular filter's one end is connected with the heat conversion appearance, the one end of heat conversion appearance is connected with the cooling tube, the front of box is provided with control panel, the inside of box is provided with rectification mechanism.
Preferably, the rectifying mechanism includes air throttle valve, the inside of box is provided with air throttle valve, air throttle valve's top and the one end fixed connection of cooling tube, air throttle valve's one end is provided with oxygen-enriched liquid passageway and liquid nitrogen passageway respectively, the one end of oxygen-enriched liquid passageway and liquid nitrogen passageway all is connected with the rectifying tube, the one end of rectifying tube is provided with nitrogen gas passageway and oxygen gas passageway respectively, nitrogen gas passageway and oxygen gas passageway all are through thermal conversion appearance and extend to the outside of box.
Preferably, one end of the box body is provided with a cooling mechanism, the cooling mechanism comprises a supporting plate, one end of the box body is provided with the supporting plate, the top end of the supporting plate is provided with an expansion machine, and one end of the expansion machine is sleeved with one end of the cooling pipe.
Preferably, one end of the air compressor is fixedly connected with one end of the molecular filter.
Preferably, the one end of cooling tube is provided with fixed establishment, fixed establishment includes the mounting box, the one end of cooling tube is provided with the mounting box, the inside movable mounting of mounting box has the fly leaf, the inside of mounting box is provided with the spring.
Preferably, the quantity of spring is two, the one end of spring all is connected with the one end of fly leaf, the one end of fly leaf is provided with the gim peg, the draw-in groove has all been seted up to the junction of cooling tube and expander, the one end of gim peg extends to the inside of draw-in groove, the one end of fly leaf is provided with the fixed block, the one end of fixed block is connected with the hinge No. one, the one end movable mounting of hinge has the block piece.
Preferably, the top end of the rectifying tube is connected with an exhaust gas pipeline, and one end of the exhaust gas pipeline extends to the outer side of the box body.
Preferably, the top of nitrogen gas passageway and oxygen passageway all is provided with protection machanism, protection machanism includes No. two hinges, the top of nitrogen gas passageway and oxygen passageway all is provided with No. two hinges, and the one end of two No. two hinges all movable mounting has the fender lid.
Compared with the prior art, the beneficial effects of the utility model are that:
1. through being provided with air throttle valve, oxygen-enriched liquid passageway, liquid nitrogen passageway, rectifying tube, nitrogen gas passageway and oxygen passageway, air throttle valve carries the rectification in the rectifying tube through oxygen-enriched liquid passageway and liquid nitrogen passageway respectively to the gas of cooling and liquefaction, then has nitrogen gas passageway and oxygen passageway outward to carry again, and the rectifying tube divide into upper and lower two-layer, can carry out the rectification respectively to oxygen and nitrogen gas, makes its rectification extract more abundant, has increased the efficiency of extracting.
2. Through being provided with backup pad and expander, the expander can be cooled off and liquefy the gas after by air compressor compression, makes follow-up processing separate gas better.
Drawings
Fig. 1 is a schematic structural front sectional view of the present invention.
Fig. 2 is a schematic view of the front view of the structure of the present invention.
Fig. 3 is an enlarged schematic view of a portion of the structure in fig. 1.
Fig. 4 is an enlarged schematic view of a part of the structure at B in fig. 1 according to the present invention.
In the figure: 100. a device body; 110. a base; 111. a box body; 112. installing a box; 113. an air suction opening; 114. an air compressor; 115. a molecular filter; 116. a thermal converter; 117. a cooling tube; 118. a control panel; 200. a rectification mechanism; 210. an air throttle valve; 211. an oxygen-enriched liquid channel; 212. a liquid nitrogen channel; 213. a rectifying tube; 214. a nitrogen channel; 215. an oxygen channel; 216. an exhaust gas conduit; 300. a cooling mechanism; 310. a support plate; 311. an expander; 400. a fixing mechanism; 410. mounting a box; 411. a movable plate; 412. a spring; 413. fastening a bolt; 414. a card slot; 415. a fixed block; 416. a first hinge; 417. a blocking block; 500. a protection mechanism; 510. a second hinge; 511. and (7) blocking the cover.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides an embodiment:
an air separation device with low-pressure single-cycle expansion comprises a device body 100, wherein an air compressor 114, a molecular filter 115, a heat converter 116, an air throttle valve 210 and an expander 311 which are used in the device body 100 are all products which can be directly purchased in the market, the principle and the connection mode of the air compressor are well known in the prior art by technical personnel in the field, and therefore the description is omitted, the device body 100 comprises a base 110, a box body 111 is arranged at the top end of the base 110, an installation box 112 is arranged at one end of the box body 111, an air suction port 113 is formed in the top end of the installation box 112, the air compressor 114 is arranged inside the installation box 112, one end of the molecular filter 115 penetrates through the box body 111 and extends to one end inside the box body 111 to be connected with the heat converter 116, one end of the heat converter 116 is connected with a cooling pipe.
The output end of the control panel 118 is electrically connected to the input end of the air compressor 114, the input end of the molecular filter 115, the input end of the thermal converter 116, the input end of the air throttle valve 210 and the input end of the expander 311, the inside of the box 111 is provided with the rectification mechanism 200, the rectification mechanism 200 comprises the air throttle valve 210, the inside of the box 111 is provided with the air throttle valve 210, the top end of the air throttle valve 210 is fixedly connected with one end of the cooling tube 117, one end of the air throttle valve 210 is respectively provided with an oxygen-rich liquid channel 211 and a liquid nitrogen channel 212, one end of the oxygen-rich liquid channel 211 and one end of the liquid nitrogen channel 212 are both connected with the rectification tube 213, one end of the rectification tube 213 is respectively provided with a nitrogen channel 214 and an oxygen channel 215, the nitrogen channel 214 and the oxygen channel 215 both extend to the outside of the box 111 through the thermal converter 116, the air throttle valve 210 transmits the cooled and liquefied gas into the rectification tube 213 through, then have nitrogen gas passageway 214 and oxygen gas passageway 215 outward to carry on again, rectifying tube 213 divide into two-layer about, can carry out the rectification respectively to oxygen and nitrogen gas, make its rectification extract more abundant, increased the efficiency of drawing, promoted the practicality of this device.
Further, the one end of box 111 is provided with cooling body 300, and cooling body 300 includes backup pad 310, and the one end of box 111 is provided with backup pad 310, and the top of backup pad 310 is provided with expander 311, and the one end of expander 311 cup joints with the one end of cooling tube 117 mutually, and expander 311 can cool off and liquefy the gas after being compressed by air compressor 114, makes subsequent processing separate gas better, has promoted the practicality of this device.
Further, one end of the air compressor 114 is fixedly connected to one end of the molecular filter 115. The molecular filter 115 can carry out molecular filtration on the gas compressed by the air compressor 114, so that the compressed gas can be better separated into oxygen and nitrogen, and the practicability of the device is improved.
Further, a fixing mechanism 400 is arranged at one end of the cooling pipe 117, the fixing mechanism 400 includes a mounting box 410, the mounting box 410 is arranged at one end of the cooling pipe 117, a movable plate 411 is movably mounted inside the mounting box 410, a spring 412 is arranged inside the mounting box 410, the number of the springs 412 is two, one end of each spring 412 is connected with one end of the corresponding movable plate 411, a latch 413 is arranged at one end of the corresponding movable plate 411, a clamping groove 414 is formed at the joint of the cooling pipe 117 and the expander 311, one end of the latch 413 extends into the clamping groove 414, a fixing block 415 is arranged at one end of the corresponding movable plate 411, one end of the corresponding fixing block 415 is connected with a first hinge 416, a blocking block 417 is movably mounted at one end of the corresponding hinge 416, the expander 311 and the cooling pipe 117 are sleeved, the clamping groove 414 formed in the expander 311 is clamped and fixed by the latch 413, so as to prevent the expander 311 from falling off during, simultaneously after long-time use, also conveniently dismantle the clearance to expander 311, promoted the practicality of this device.
Further, the top of rectifying tube 213 is connected with exhaust gas line 216, and exhaust gas line 216's one end extends to the outside of box 111, and the exhaust gas body after the separation can be followed exhaust gas line 216 and externally discharged mutually, prevents to be detained in rectifying tube 213's inside, to causing the influence man-hour, has promoted the practicality of this device.
Further, the top of nitrogen gas passageway 214 and oxygen passageway 215 all is provided with protection machanism 500, protection machanism 500 includes No. two hinges 510, the top of nitrogen gas passageway 214 and oxygen passageway 215 all is provided with No. two hinges 510, the one end of No. two hinges 510 all movable mounting have fender lid 511, when device body 100 stops to use, will keep off lid 511 and cover in nitrogen gas passageway 214 and oxygen passageway 215, prevent that its inside from falling into dust and impurity, the clean and tidy nature of inside transport has been guaranteed, the practicality of this device has been promoted.
The working principle is as follows: the gas enters the air compressor 114 through the air suction port 113, the air is compressed by the air compressor 114, then bacterial impurity molecules inside the gas are filtered through the molecular filter 115, the compressed air enters the thermal converter 116 for thermal-cold conversion, the converted air is conveyed through the cooling pipe 117, the expander 311 cools the inside of the cooling pipe 117 again to liquefy the gas inside the cooling pipe 117, the liquefied gas is divided through the oxygen-rich liquid channel 211, the oxygen-rich liquid and the liquid nitrogen are respectively conveyed to the upper layer and the lower layer of the rectifying pipe 213 for rectification, the rectified oxygen and nitrogen are respectively conveyed outwards through the oxygen channel 215 and the nitrogen channel 214, and the rest waste gas is discharged outwards through the waste gas pipeline 216.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. A low-pressure single-cycle expanded air separation plant, comprising a plant body (100), characterized in that: the device body (100) comprises a base (110), the top end of the base (110) is provided with a box body (111), one end of the box body (111) is provided with an installation box (112), an air suction opening (113) is formed in the top end of the installation box (112), an air compressor (114) is arranged inside the installation box (112), a molecular filter (115) is arranged inside the box body (111), one end of the molecular filter (115) penetrates through the box body (111) and extends to the inside one end of the box body (111) to be connected with a heat conversion instrument (116), one end of the heat conversion instrument (116) is connected with a cooling pipe (117), and a rectification mechanism (200) is arranged inside the box body (111).
2. A low pressure single cycle expanded air separation plant as claimed in claim 1 wherein: rectifying mechanism (200) includes air throttle valve (210), the inside of box (111) is provided with air throttle valve (210), the top of air throttle valve (210) is connected with the one end of cooling tube (117), the one end of air throttle valve (210) is provided with oxygen-enriched liquid passageway (211) and liquid nitrogen passageway (212) respectively, the one end of oxygen-enriched liquid passageway (211) and liquid nitrogen passageway (212) all is connected with rectifier tube (213), the one end of rectifier tube (213) is provided with nitrogen gas passageway (214) and oxygen gas passageway (215) respectively, nitrogen gas passageway (214) and oxygen gas passageway (215) all pass through thermal conversion appearance (116) and extend to the outside of box (111).
3. A low pressure single cycle expanded air separation plant as claimed in claim 1 wherein: one end of the box body (111) is provided with a cooling mechanism (300), the cooling mechanism (300) comprises a supporting plate (310), one end of the box body (111) is provided with the supporting plate (310), the top end of the supporting plate (310) is provided with an expansion machine (311), and one end of the expansion machine (311) is sleeved with one end of the cooling pipe (117).
4. A low pressure single cycle expanded air separation plant as claimed in claim 1 wherein: one end of the air compressor (114) is connected with one end of the molecular filter (115).
5. A low pressure single cycle expanded air separation plant as claimed in claim 2 wherein: the one end of cooling tube (117) is provided with fixed establishment (400), fixed establishment (400) are including mounting box (410), the one end of cooling tube (117) is provided with mounting box (410), the inside movable mounting of mounting box (410) has fly leaf (411), the inside of mounting box (410) is provided with spring (412).
6. A low pressure single cycle expanded air separation plant as claimed in claim 2 wherein: the top end of the rectifying pipe (213) is connected with a waste gas pipeline (216), and one end of the waste gas pipeline (216) extends to the outer side of the box body (111).
7. A low pressure single cycle expanded air separation plant as claimed in claim 2 wherein: the top of nitrogen gas passageway (214) and oxygen passageway (215) all is provided with protection machanism (500), protection machanism (500) are including No. two hinges (510), the top of nitrogen gas passageway (214) and oxygen passageway (215) is provided with No. two hinges (510).
CN202021753468.5U 2020-08-20 2020-08-20 Low-pressure single-cycle expansion air separation device Active CN212902243U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021753468.5U CN212902243U (en) 2020-08-20 2020-08-20 Low-pressure single-cycle expansion air separation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021753468.5U CN212902243U (en) 2020-08-20 2020-08-20 Low-pressure single-cycle expansion air separation device

Publications (1)

Publication Number Publication Date
CN212902243U true CN212902243U (en) 2021-04-06

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CN202021753468.5U Active CN212902243U (en) 2020-08-20 2020-08-20 Low-pressure single-cycle expansion air separation device

Country Status (1)

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CN (1) CN212902243U (en)

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