CN206959455U - Liquid nitrogen withdrawing device and air separation plant - Google Patents
Liquid nitrogen withdrawing device and air separation plant Download PDFInfo
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- CN206959455U CN206959455U CN201720923063.3U CN201720923063U CN206959455U CN 206959455 U CN206959455 U CN 206959455U CN 201720923063 U CN201720923063 U CN 201720923063U CN 206959455 U CN206959455 U CN 206959455U
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- liquid nitrogen
- liquid
- withdrawing device
- discharge connection
- slotted disk
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Abstract
The utility model belongs to cryogenic rectification technical field of air separation.A kind of liquid nitrogen withdrawing device, including liquid nitrogen entrance sleeve, liquid nitrogen discharge connection and liquid nitrogen slotted disk in a ring, the liquid nitrogen entrance sleeve and liquid nitrogen discharge connection are relative to be laid on the upper tower body sidewall of air separation plant, and the position of the liquid nitrogen entrance sleeve is higher than the position of the liquid nitrogen discharge connection；The liquid nitrogen slotted disk is arranged on the upper tower cylinder inboard wall of the liquid nitrogen discharge connection bottom, wherein, liquid nitrogen is flowed into liquid nitrogen slotted disk by the liquid nitrogen entrance sleeve, is flowed out by liquid nitrogen slotted disk and by liquid nitrogen discharge connection.The utility model can reclaim liquid nitrogen vapor and cold of the liquid nitrogen product taken out in air separation plant after throttling；And more traditional device structure techniqueflow is simple so that air separation plant cold insulation box equipment, pipeline are more succinct, are easy to the laying of whole upper tower internal structure.
Description
Technical field
The utility model belongs to cryogenic rectification technical field of air separation, and in particular to a kind of liquid nitrogen withdrawing device and space division
Equipment.
Background technology
Air separation plant typically can produce certain liquid oxygen and liquid nitrogen product, into liquid storage system in case making when needing
With.Air obtains liquid air after the preliminary rectifying of lower tower in lower tower bottom in air separation plant, and purity nitrogen is obtained in lower top of tower.Lower tower,
Liquid air, the pure liquid nitrogen of condenser/evaporator extraction, upper tower corresponding site, a part of liquid nitrogen are sent into subcooler supercooling rear portion
It is directly entered liquid nitrogen storage.The extracting position of liquid nitrogen product typically has two kinds：First, directly taken out from the pipeline after subcooler；
Second, it is delivered to liquid storage system through liquid nitrogen measuring tank after being taken out on the pipeline after liquid nitrogen subcooler.
When directly being taken out from the pipeline after subcooler, certain rate of gasification is had after sending out valve throttling, this part low temperature
Nitrogen will together enter liquid nitrogen storage with liquid nitrogen, be discharged into air finally by the gas bleeder at the top of liquid nitrogen storage, cause
While product wastes, cryogenic gas, which is directly discharged into air, will also carry away a little cold, be the waste on a kind of energy.Using
Structure is complex when liquid nitrogen graduated cylinder takes out, and producing part nitrogen after choke valve after being taken out from the pipeline after subcooler forms gas
Liquid is carried secretly, and the product of this part entrained liquid obtains nitrogen at top through liquid nitrogen graduated cylinder, and bottom obtains liquid nitrogen, and nitrogen then imports
Reclaimed in the nitrogen product pipeline that top of tower is extracted out and reclaim cold through main heat exchanger, liquid nitrogen is then routed directly to liquid nitrogen storage.
The content of the invention
The purpose of this utility model is to be directed to above-mentioned problem and shortage, there is provided it is a kind of reasonable in design, can
The liquid nitrogen withdrawing device and air separation plant of the effective recycling for improving energy.
To reach above-mentioned purpose, adopted the technical scheme that：
A kind of liquid nitrogen withdrawing device, including liquid nitrogen entrance sleeve, liquid nitrogen discharge connection and liquid nitrogen slotted disk in a ring,
The liquid nitrogen entrance sleeve and liquid nitrogen discharge connection are relative to be laid on the upper tower body sidewall of air separation plant, and the liquid nitrogen enters
The position of mouth adapter is higher than the position of the liquid nitrogen discharge connection；The liquid nitrogen slotted disk is arranged on the liquid nitrogen discharge connection bottom
Upper tower cylinder inboard wall on, wherein, liquid nitrogen by the liquid nitrogen entrance sleeve flow into liquid nitrogen slotted disk in, by liquid nitrogen slotted disk and by
Liquid nitrogen discharge connection flows out.
Further, gear liquid bath, the gear liquid are provided with upper tower cylinder inboard wall corresponding with the liquid nitrogen entrance sleeve
The liquid outlet of groove is corresponding with liquid nitrogen slotted disk.
Further, the gear liquid bath includes upper curved plate, lower curved plate and side shield, the liquid outlet of left and right two of the gear liquid bath
It is corresponding with liquid nitrogen slotted disk.
Further, the annular that the liquid nitrogen slotted disk includes being fixedly installed on tower cylinder inboard wall connects liquid chassis, set
Liquid blocking dike on the inside of liquid chassis is connect in annular, laterally annular is arranged on and connects the liquid-droping groove on liquid chassis and set across setting and connect
An at least downspout on liquid-droping groove.
Further, the upper of the liquid-droping groove is less than or equal to the upper along height, the downspout of the liquid blocking dike along height
Upper end be higher than the height of the liquid nitrogen discharge connection, and the upper end of the downspout is less than the liquid-droping groove and the gear
The height of the liquid outlet of liquid bath.
Further, it is α arrangements into angle on liquid nitrogen entrance sleeve and liquid nitrogen the discharge connection above tower body sidewall,
Wherein, 90 °≤α≤180 °.
A kind of air separation plant, including Shang Ta and lower tower, liquid nitrogen withdrawing device is provided with the upper tower, and the liquid nitrogen takes out
Device is above-mentioned liquid nitrogen withdrawing device.
Using above-mentioned technical proposal, acquired beneficial effect is：
The utility model overall construction design is reasonable, and it can reclaim the liquid nitrogen product taken out in air separation plant after throttling
Liquid nitrogen vapor and cold；The more traditional device structure techniqueflow of the structure of the application is simple simultaneously so that air separation plant is protected
Cold box equipment, pipeline are more succinct, are easy to the laying of whole upper tower internal structure, so as to optimize the structure of product, improve
The performance of product, contribute to the innovation of product structure, the competitiveness of product in market can be greatly improved.
Brief description of the drawings
Fig. 1 is theory structure schematic diagram of the present utility model.
Fig. 2 is the structural representation of liquid nitrogen withdrawing device.
Fig. 3 is Fig. 2 overlooking the structure diagram.
Fig. 4 is the structural representation of gear liquid bath.
Fig. 5 is Fig. 4 overlooking the structure diagram.
Fig. 6 is the structural representation of liquid nitrogen slotted disk.
Sequence number in figure：1000- cold insulated cabinets, tower under 2000-, 3000- condenser/evaporators, the upper towers of 4000-, 4100- liquid nitrogen take
Go out device, 5000- liquid choke valves, 6000- liquid nitrogen takes out valve, 7000- subcoolers；
4110- liquid nitrogen entrance sleeves, 4120- gear liquid baths, 4130- liquid nitrogen slotted disks, 4140- liquid nitrogen discharge connections；On 4121-
Arc plate, 4122- lower curved plates, 4123- baffle plates；4131- connects liquid chassis, 4132- liquid blocking dikes, 4133- liquid-droping grooves, 4134- downspouts.
Embodiment
Specific embodiment of the present utility model is elaborated below in conjunction with accompanying drawing.
As shown in figure 1, it is condenser/evaporator K1 in cold insulated cabinet in typical double rectification column direct-coupling space division model
The low temperature liquid nitrogen of extraction is sent into subcooler through pipeline LN01, and the liquid nitrogen after subcooler cools down is after choke valve V1 is depressured desuperheat
Finally entered with gas-liquid two-phase state by pipeline LN03 in the liquid nitrogen withdrawing device of upper tower, nitrogen products take out valve through liquid nitrogen again
V2 sends out cold insulated cabinet.
As shown in Fig. 2-Fig. 6, a kind of liquid nitrogen withdrawing device of the application, including the outlet of liquid nitrogen entrance sleeve 4110, liquid nitrogen connect
Pipe 4140 and liquid nitrogen slotted disk 4130 in a ring, liquid nitrogen entrance sleeve 4110 and liquid nitrogen discharge connection 4140 are relative to be laid in
On the upper tower body sidewall of air separation plant, and the position of liquid nitrogen entrance sleeve 4110 is higher than the position of liquid nitrogen discharge connection 4140；
Liquid nitrogen slotted disk 4130 includes the annular that is fixedly installed on tower cylinder inboard wall and connects liquid chassis 4131, is arranged on annular and connects liquid chassis
The liquid blocking dike 4132 of inner side, laterally it is arranged on annular and connects the liquid-droping groove 4133 on liquid chassis and be arranged on descending liquid across setting and connect
An at least downspout 4134 on groove.Liquid nitrogen slotted disk 4130 is arranged on the upper tower cylinder inboard wall of the bottom of liquid nitrogen discharge connection 4140
On, wherein, liquid nitrogen is flowed into liquid nitrogen slotted disk 4130 by liquid nitrogen entrance sleeve 4110, is gone out by liquid nitrogen slotted disk 4130 and by liquid nitrogen
Mouth adapter 4140 is flowed out.
Wherein, gear liquid bath 4120 is provided with tower cylinder inboard wall on corresponding with liquid nitrogen entrance sleeve 4110, keeps off liquid bath
4120 include upper curved plate 4121, lower curved plate 4122 and side shield 4123, keep off the liquid outlet of left and right two and liquid nitrogen slotted disk of liquid bath 4120
4130 correspondences.
In the present embodiment, the upper of liquid-droping groove 4133 is less than or equal to the upper along height, drop of the liquid blocking dike 4132 along height
The upper end of liquid pipe 4134 is higher than the height of the liquid nitrogen discharge connection 4140, and the upper end of the downspout 4134 is less than institute
State the height of the liquid outlet of liquid-droping groove 4133 and the gear liquid bath 4120.Meanwhile liquid nitrogen entrance sleeve and liquid nitrogen discharge connection with
On upper tower body sidewall into angle be α arrangement, wherein, preferable 90 °≤α≤180 °.
As shown in Fig. 2 gear liquid bath is highly h5, liquid-droping groove is all mutually h3 with liquid blocking dike height, and downspout is in liquid-droping groove
Height be h4, liquid nitrogen discharge connection is arranged on distance and connect on liquid chassis highly in h2 tower body side wall, liquid nitrogen entrance sleeve
Distance is arranged on to connect on liquid chassis highly in h1 tower body side wall.
Wherein, liquid nitrogen entrance sleeve height highly meets relation with gear liquid bath（H1-h5/2 ＞ h4, that is, keep off liquid bath bottom and be higher than
Height h4 of the downspout in liquid-droping groove；Height h4 of the downspout in liquid-droping groove is higher than liquid nitrogen conveying end adapter peak height
（H2+ Φ D2/2, wherein Φ D2 are liquid nitrogen conveying end adapter external diameter）And be less than the height h3 of liquid-droping groove, i.e.,（h2+ΦD2/2）<h4
<h3。
The application also provides a kind of air separation plant, including Shang Ta and lower tower, and liquid nitrogen withdrawing device 4100 is provided with upper tower,
The liquid nitrogen withdrawing device 4100 is the liquid nitrogen withdrawing device in above-described embodiment.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
For personnel it should be appreciated that the present invention is not limited to the above embodiments, that described in above-described embodiment and specification is the present invention
Principle, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these change and
Improvement is both fallen within the range of claimed invention.The protection domain of application claims by appended claims and its
Equivalent defines.
Claims (7)
- A kind of 1. liquid nitrogen withdrawing device, it is characterised in that including：Liquid nitrogen entrance sleeve；Liquid nitrogen discharge connection, the relative upper tower side for being laid in air separation plant of the liquid nitrogen entrance sleeve and liquid nitrogen discharge connection On wall, and the position of the liquid nitrogen entrance sleeve is higher than the position of the liquid nitrogen discharge connection；And liquid nitrogen slotted disk in a ring, the liquid nitrogen slotted disk are arranged on the upper tower cylinder inboard wall of the liquid nitrogen discharge connection bottom On, wherein, liquid nitrogen is flowed into liquid nitrogen slotted disk by the liquid nitrogen entrance sleeve, by liquid nitrogen slotted disk and by liquid nitrogen discharge connection stream Go out.
- 2. liquid nitrogen withdrawing device according to claim 1, it is characterised in that：Upper tower corresponding with the liquid nitrogen entrance sleeve Gear liquid bath is provided with cylinder inboard wall, the liquid outlet of the gear liquid bath is corresponding with liquid nitrogen slotted disk.
- 3. liquid nitrogen withdrawing device according to claim 2, it is characterised in that：The gear liquid bath includes upper curved plate, lower curved plate And side shield, the liquid outlet of left and right two of the gear liquid bath are corresponding with liquid nitrogen slotted disk.
- 4. the liquid nitrogen withdrawing device according to Claims 2 or 3, it is characterised in that：The liquid nitrogen slotted disk includes fixed setting Annular on upper tower cylinder inboard wall, which connects liquid chassis, is arranged on annular connects liquid blocking dike on the inside of liquid chassis, laterally across setting and connect It is arranged on annular and connects the liquid-droping groove on liquid chassis and at least downspout being arranged on liquid-droping groove.
- 5. liquid nitrogen withdrawing device according to claim 4, it is characterised in that：The upper of the liquid-droping groove is less than or equal to along height The upper edge height of the liquid blocking dike, the upper end of the downspout is higher than the height of the liquid nitrogen discharge connection, and the descending liquid Height of the upper end of pipe less than the liquid-droping groove and the liquid outlet of the gear liquid bath.
- 6. liquid nitrogen withdrawing device according to claim 1, it is characterised in that：Liquid nitrogen entrance sleeve and the liquid nitrogen outlet connects On pipe above tower body sidewall into angle be α arrangement, wherein, 90 °≤α≤180 °.
- A kind of 7. air separation plant, it is characterised in that：Including Shang Ta and lower tower, liquid nitrogen withdrawing device, institute are provided with the upper tower Liquid nitrogen withdrawing device is stated as any described liquid nitrogen withdrawing device of claim 1 ~ 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720923063.3U CN206959455U (en) | 2017-07-27 | 2017-07-27 | Liquid nitrogen withdrawing device and air separation plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720923063.3U CN206959455U (en) | 2017-07-27 | 2017-07-27 | Liquid nitrogen withdrawing device and air separation plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206959455U true CN206959455U (en) | 2018-02-02 |
Family
ID=61381556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720923063.3U Active CN206959455U (en) | 2017-07-27 | 2017-07-27 | Liquid nitrogen withdrawing device and air separation plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206959455U (en) |
-
2017
- 2017-07-27 CN CN201720923063.3U patent/CN206959455U/en active Active
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