CN208751134U - A kind of device of the cryogenic separation CO gas of nitrogen cycle refrigeration - Google Patents
A kind of device of the cryogenic separation CO gas of nitrogen cycle refrigeration Download PDFInfo
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- CN208751134U CN208751134U CN201821372042.8U CN201821372042U CN208751134U CN 208751134 U CN208751134 U CN 208751134U CN 201821372042 U CN201821372042 U CN 201821372042U CN 208751134 U CN208751134 U CN 208751134U
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Abstract
The utility model discloses a kind of devices of the cryogenic separation CO gas of nitrogen cycle refrigeration, belong to deep freeze refrigeration plant field.It mainly include nitrogen compressor system and ice chest separative unit.Nitrogen compressor system uses three-stage blower, for providing cooling capacity for entire ice chest separative unit.And main body is ice chest in ice chest separative unit, is equipped with plate-fin heat exchanger, domethanizing column condenser, demethanizer reboiler, knockout drum, hydrogen rich gas flash tank, stripper, denitrification column and domethanizing column in ice chest.The cryogenic separation device of the utility model can extract CO product gas, fuel gas, flash steam and hydrogen rich gas from the purified unstripped gas of molecular screener adsorbing system, to realize efficiently separating for component.The utility model uses individual circulating nitrogen gas refrigeration system, provides cooling capacity for whole device.In whole device, according to the optimization situation of heat-exchange network, the nitrogen pressure into compressor can be divided into two or three grades, to save the energy consumption of cryogenic separation.
Description
Technical field
The utility model belongs to deep freeze refrigeration plant field, and in particular to a kind of cryogenic separation carbon monoxide gas of nitrogen cycle refrigeration
The device of body.
Background technique
Carbon monoxide (CO) and hydrogen (H2) it is important basic chemical industry raw material, it is widely used in the chemical industry mistake such as carbonylation synthesis
Journey, such as Production of Acetic Acid by Methanol Carbonylation, aceticanhydride, formic acid, oxalic acid and dimethylformamide etc. and optical self-encoding, the poly- carbon of production
Acid esters, polyurethane, synthesis metal carbonyl etc..CO and H at present2Separation mainly has Deep Cooling Method, absorption process and pressure-variable adsorption
Method etc..Deep cooling separating method therein is suitable for large-scale industrial production, can effectively obtain the CO of high-purity, separation effect
Fruit is very ideal.The core of cryogenic separation method is realized in rectifying column using the difference of each component boiling point in mixed gas
The separation of admixture of gas.Chinese patent (publication number CN1860338A) describes a kind of separate and contains CO, H2And N2Technique side
Method.This method has the disadvantage that it separates CO and H2Process CIMS it is complicated, and energy consumption is higher.And application No. is
The utility model patent of CN201120212483.3 also discloses the device of a kind of cryogenic separation carbon monoxide and hydrogen, application number
One kind is disclosed by low temperature distillation separation including at least hydrogen, nitrogen and carbon monoxide for the patent of invention of CN200780047765.9
Mixture method and apparatus, application No. is the patents of invention of CN200480030835.6 to disclose a kind of production of low temperature distillation
The method and apparatus of carbon monoxide and/or hydrogen and/or hydrogen and carbon monoxide mixtures, but these equipment in use also or
Mostly or less have the defects that technique, in energy consumption, needs further improvement.
Summary of the invention
The problem of utility model aims to solve the uses of metal pad in the prior art, and one kind is provided
The device of the cryogenic separation CO gas of nitrogen cycle refrigeration.
Specific technical solution used by the utility model is as follows:
A kind of device of the cryogenic separation CO gas of nitrogen cycle refrigeration comprising ice chest and nitrogen compressor；Institute
It states and is equipped with the first main heat exchanger, the second main heat exchanger, subcooler, stripper reboiler, denitrogenation tower reboiler, demethanation in ice chest
Tower condenser, demethanizer reboiler, knockout drum, hydrogen rich gas flash tank, stripper, denitrification column and domethanizing column；
Unstripped gas input port enters ice chest by pipeline after purification, then flows sequentially through the first main heat exchanger, stripper again
Enter hydrogen rich gas flash tank, hydrogen rich gas flash tank tank deck hydrogen-rich after boiling device, denitrogenation tower reboiler, the second main heat exchanger, subcooler
Gas outlet followed by cooling box after subcooler, the second main heat exchanger, the first main heat exchanger and passes to battery limit (BL) by pipeline；Hydrogen-rich
The liquid outlet conduit of gas flash tank tank bottom is divided into two branches, and a branch enters in the middle part of stripper by subcooler, another
Branch enters stripper top；The flashed vapour outlet of stripper overhead is by pipeline followed by subcooler, the second main heat exchange
Cooling box and battery limit (BL) is passed to after device, the first main heat exchanger；Stripper bottom partially liq enters stripper reboiler by pipeline
Stripper lower part is re-entered after heat exchange evaporation, the liquid outlet of stripper tower bottom is connected in the middle part of denitrification column by pipeline；
Denitrification column bottom part liquid re-enters under denitrification column after entering the heat exchange evaporation of denitrogenation tower reboiler by pipeline
Portion, the outlet of denitrification column overhead gas connect denitrogenation overhead condenser by pipeline, and the liquid outlet of denitrogenation tower bottom passes through pipeline
It is connected to denitrogenation overhead condenser, and liquid is inputted in the middle part of domethanizing column after evaporating in denitrogenation overhead condenser by pipeline；
Demethanizer bottom partially liq re-enters piptonychia after entering demethanizer reboiler heat exchange evaporation by pipeline
Alkane tower reboiler lower part；The CO gas vent of demethanizer column overhead goes out after passing sequentially through the second main heat exchanger, the first main heat exchanger
Ice chest simultaneously passes to battery limit (BL)；The methane-rich liquid outlet of domethanizing column tower bottom and the condensed rich nitrogen outlet of denitrogenation overhead condenser are logical
After piping converges, cooling box and battery limit (BL) successively is passed to after the second main heat exchanger, the first main heat exchanger；
The nitrogen compressor circulating nitrogen gas outlet by pipeline input ice chest, successively pass through the first main heat exchanger,
Enter knockout drum, the circulating liquid nitrogen of knockout drum after stripper reboiler, denitrogenation tower reboiler, demethanizer reboiler
Outlet is divided into three tunnels, the first via by pipeline to denitrogenation column overhead, the second tunnel by pipeline to demethanizer column overhead,
Third road followed by cooling box after subcooler, the second main heat exchanger, the first main heat exchanger and connects nitrogen compression by pipeline
The level-one entrance of machine；The vaporized nitrogen gas outlet of demethanizer column overhead is changed by pipeline followed by the second main heat exchanger, the first master
Cooling box and the secondary inlet of nitrogen compressor is connected after hot device；Knockout drum tank deck gas vent and denitrogenation column overhead are evaporated
After nitrogen outlet is converged by pipeline, then followed by cooling box after the second main heat exchanger, the first main heat exchanger and connect nitrogen
The three-level entrance of compressor；
It mends cold liquid nitrogen channel and is externally entering ice chest, go out followed by the first main heat exchanger, the second main heat exchanger, subcooler
Ice chest is to battery limit (BL).
Preferably, there are two the denitrogenation overhead condensers, the first denitrogenation overhead condenser and the second denitrogenation tower top
Condenser is respectively arranged at denitrogenation column overhead, parallel operation.
Preferably, former after purification of the unstripped gas input port by pipeline connection molecule sieve adsorption system after the purification
Expect gas outlet.
Preferably, the stripper, denitrification column and domethanizing column are packed tower.
Preferably, the entrance in the cold liquid nitrogen channel of benefit connects liquid nitrogen storage.
The cryogenic separation device of the utility model can extract CO from the purified unstripped gas of molecular screener adsorbing system
Product gas, fuel gas, flash steam and hydrogen rich gas, to realize efficiently separating for useful constituent.Moreover, the utility model is using single
Only circulating nitrogen gas refrigeration system, provides cooling capacity for whole device.In whole device, according to the optimization situation of heat-exchange network, into
The nitrogen pressure of compressor can be divided into two or three grades, so as to save the energy consumption of cryogenic separation.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the device of the cryogenic separation CO gas of nitrogen cycle refrigeration；
Fig. 2 is the enlarged diagram of the position B1 in Fig. 1；
In figure: the first main heat exchanger E1, the second main heat exchanger E2, subcooler E3, stripper reboiler E4, the first denitrification column
Top condenser E5, denitrogenation tower reboiler E6, the second denitrogenation overhead condenser E7, domethanizing column condenser E8, domethanizing column boil again
Device E9, knockout drum V1, hydrogen rich gas flash tank V2, stripper T1, denitrification column T2 and domethanizing column T3.
Specific embodiment
The utility model is further elaborated and is illustrated with reference to the accompanying drawings and detailed description.In the utility model
The technical characteristic of each embodiment can carry out the corresponding combination under the premise of not conflicting with each other.
As shown in Figure 1, a kind of device of the cryogenic separation CO gas of nitrogen cycle refrigeration, mainly includes nitrogen pressure
Contracting machine system A and ice chest separative unit B.Nitrogen compressor system A uses three-stage blower, for being entire ice chest separative unit
B provides cooling capacity.And main body is ice chest in ice chest separative unit B, is equipped with plate-fin heat exchanger, domethanizing column condenser in ice chest
E8, demethanizer reboiler E9, knockout drum V1, hydrogen rich gas flash tank V2, stripper T1, denitrification column T2 and domethanizing column
T3.Plate-fin heat exchanger includes the first main heat exchanger E1, the second main heat exchanger E2, subcooler E3, and heat exchanger is divided into three parts,
Primarily to optimizing and matching the heat exchange of per share logistics.Heat exchanger is compact in this way, the channel not wasted.The present embodiment
In, stripper T1, denitrification column T2 and domethanizing column T3 are packed tower, are filled with filler in the middle part of tower.Stripper reboiler E4,
Denitrogenation tower reboiler E6, demethanizer reboiler E9 are respectively arranged at the tower bottom of stripper T1, denitrification column T2, domethanizing column T3
It is flowed from the bottom to top from tower bottom in gaseous form for the liquid of tower bottom to be carried out heat exchange evaporation in portion.Denitrification column T2 tower top is equipped with
Two denitrogenation overhead condensers, the first denitrogenation overhead condenser E5 and the second denitrogenation overhead condenser E7 are located in parallel
Tower top, for being condensed to the gas that tower top is discharged.The tower top of domethanizing column T3 also is provided with a domethanizing column condenser E8,
For being condensed to the gas that tower top is discharged.
In the device, the connection type of each equipment is as follows:
Unstripped gas is delivered to unstripped gas input port after the purification of molecular screener adsorbing system, and unstripped gas input port passes through pipeline again
Connection enters ice chest, then flows sequentially through the first main heat exchanger E1, stripper reboiler E4, denitrogenation tower reboiler E6, the second master
Enter hydrogen rich gas flash tank V2 after heat exchanger E2, subcooler E3.Hydrogen rich gas flash tank V2 tank deck is exported equipped with hydrogen rich gas, and tank bottom
Equipped with liquid outlet.The outlet of hydrogen rich gas flash tank V2 tank deck hydrogen rich gas is by pipeline followed by subcooler E3, the second main heat exchange
Cooling box and battery limit (BL) is passed to after device E2, the first main heat exchanger E1, for exporting hydrogen rich gas.The liquid of hydrogen rich gas flash tank V2 tank bottom
Outlet conduit is divided into two branches, and a branch enters the packing area in the middle part of stripper T1, another branch by subcooler E3
Into above the filler at the top of stripper T1, flow liquid from top to bottom in stripper T1.Stripper T1 tower top, which is equipped with, to be dodged
Vapor outlet port, the flashed vapour outlet of stripper T1 tower top is by pipeline followed by subcooler E3, the second main heat exchanger E2, first
Cooling box and battery limit (BL) is passed to after main heat exchanger E1, for exporting flashed vapour.The bottom stripper T1 can be stored with partially liq, stripping
The liquid memory block of the bottom tower T1 connects stripper reboiler E4 by a pipeline, then recirculates back to stripper T1's again
Below filler, so that stripper T1 bottom liquid enters stripper reboiler E4 by pipeline, changed in stripper reboiler E4
The lower part stripper T1 is re-entered after thermal evaporation, then gas rises and exchanges heat with the liquid to flow downward.Stripper T1
The liquid outlet of tower bottom also passes through a pipeline connection denitrification column T2, the filler for being delivered to liquid in the middle part of denitrification column T2
Area.
The bottom denitrification column T2 can also be stored with partially liq, and the liquid memory block of the bottom denitrification column T2 is also by a pipeline
Denitrogenation tower reboiler E6 is connected, is then recirculated back to again below the filler of denitrification column T2, is taken off so that liquid is entered by pipeline
Nitrogen tower reboiler E6 re-enters the lower part denitrification column T2 after heat exchange evaporation in denitrogenation tower reboiler E6, and then gas rises simultaneously
It exchanges heat with the liquid to flow downward.The outlet of denitrification column T2 overhead gas is separately connected the first denitrogenation overhead condensation by pipeline
Device E5 and the second denitrogenation overhead condenser E7, overhead gas liquid in two condensers condense, the first denitrogenation overhead condenser
After rich nitrogen in E5 and the second denitrogenation overhead condenser E7 after condensation process converges, then with subsequent domethanizing column T3 tower
Bottom methane-rich liquid collects, and the cooling box after plate-fin heat exchanger re-heat goes to battery limit (BL).The liquid outlet of the bottom denitrification column T2 passes through pipe
Road is connected to denitrogenation overhead condenser, and partially liq is delivered in condenser, for providing part cooling capacity for condensation.And liquid
In denitrogenation overhead condenser after heat absorption evaporation, inputted in the middle part of domethanizing column T3 by pipeline.
There is also fluid accumulations for the bottom domethanizing column T3, and the liquid memory block of the bottom domethanizing column T3 is also by a pipeline
Demethanizer reboiler E9 is connected, is then recirculated back to again below the filler of domethanizing column T3, so that the bottom domethanizing column T3
Partially liq is entered in demethanizer reboiler E9 by pipeline, is re-entered after heat exchange evaporation in demethanizer reboiler E9
The lower part demethanizer reboiler E9, then gas rises and exchanges heat with the liquid to flow downward.Domethanizing column T3 tower top
CO gas vent passes sequentially through cooling box after the second main heat exchanger E2, the first main heat exchanger E1 and passes to battery limit (BL), for exporting CO
Product gas.Domethanizing column T3 tower bottom accumulates methane-rich liquid, methane-rich liquid outlet and the condensed rich nitrogen of denitrogenation overhead condenser
After outlet converges by pipeline, successively cooling box and battery limit (BL) is passed to after the second main heat exchanger E2, the first main heat exchanger E1, use
In externally offer fuel gas.
There are three entrances, respectively level-one entrance, secondary inlet and three-level entrance for nitrogen compressor tool, and input is different respectively
The gas of position reflux；In addition also there is a circulating nitrogen gas outlet, compressed nitrogen is re-entered into ice chest.Nitrogen compression
Machine and the connection relationship of equipment each in ice chest are as follows:
The circulating nitrogen gas outlet of nitrogen compressor inputs ice chest by pipeline, successively by the first main heat exchanger E1, stripping
Enter knockout drum V1 after tower reboiler E4, denitrogenation tower reboiler E6, demethanizer reboiler E9, circulating liquid nitrogen is in gas-liquid point
From gas-liquid separation occurs in tank V1.The circulating liquid nitrogen outlet of the bottom knockout drum V1 is divided into three tunnels: the first via is defeated by pipeline
It send into the first denitrogenation overhead condenser E5 of denitrification column T2 tower top or the second denitrogenation overhead condenser E7, for providing condensation
Cooling capacity；Second tunnel passes through the domethanizing column condenser E8 of pipeline to domethanizing column T3 tower top, for providing the cooling capacity of condensation；
Third road followed by cooling box after subcooler E3, the second main heat exchanger E2, the first main heat exchanger E1 and connects nitrogen by pipeline
The level-one entrance of air compressor, so that liquid nitrogen constantly recycles.Liquid nitrogen steams in the domethanizing column condenser E8 of domethanizing column T3 tower top
The nitrogen generated after hair heat exchange, exports from vaporized nitrogen gas and is discharged, and is changed by pipeline followed by the second main heat exchanger E2, the first master
Cooling box and secondary inlet into nitrogen compressor is connected after hot device E1.Knockout drum V1 tank deck gas vent and denitrification column
T2 tower top vaporized nitrogen gas outlet converge by pipeline after, then followed by after the second main heat exchanger E2, the first main heat exchanger E1 out
Ice chest and the three-level entrance for connecting nitrogen compressor.
In addition, plate-fin heat exchanger in the process of running, needs external conveying to mend cold liquid nitrogen, cold liquid nitrogen storage is mended in liquid nitrogen
In storage tank.Cold liquid nitrogen one end of the channel connection liquid nitrogen storage is mended, the other end is externally entering ice chest, followed by the first main heat exchanger
After E1, the second main heat exchanger E2, subcooler E3 supplement cooling capacity, then cooling box to battery limit (BL) discharges.
Conventional CO compressor is replaced in the utility model using nitrogen compressor refrigeration cycle, both sides can be brought
Advantage.On the one hand, the use of nitrogen compressor reduces the cost of investment of equipment, because CO belongs to flammable, toxic gas,
CO compressor must be avoided combustible and poisonous gas from leaking into environment, be caused personnel's using the compressor with dry gas seals
Injury；And nitrogen is a kind of non-flammable inert gas, causes personnel to suffocate as long as avoiding largely discharging, therefore nitrogen pressure
Contracting machine does not have to band dry gas sealing device usually, not only reduces plant investment, but also safer.On the other hand, by optimizing nitrogen
The temperature grade of gas throttling refrigeration, additionally it is possible to be reduced the energy consumption of entire process system.
In addition, for the ease of control, settable corresponding control valve on each pipeline of above-mentioned apparatus.
The technique of cryogenic separation CO gas based on above-mentioned apparatus, its step are as follows:
By after the purification of molecular screener adsorbing system unstripped gas be passed through ice chest, in the first main heat exchanger E1 cool down after,
As stripper T1 tower bottom heat source and denitrification column T2 tower bottom heat source, hydrogen rich gas flash tank is entered after being then cooled to -182 DEG C
V2 flash distillation, hydrogen rich gas flash tank V2 tank deck hydrogen rich gas pass sequentially through subcooler E3, the second main heat exchanger E2 and the first main heat exchanger
Cooling box after E1 re-heat, goes to battery limit (BL)；Hydrogen rich gas flash tank V2 tank bottom liquid is divided into two parts, and a part of liquid adds through subcooler E3
Enter in the middle part of stripper T1 after heat and throttling, enters at the top of stripper T1 after the throttling of another part liquid；Stripper T1 tower bottom
Liquid separation body in stripper reboiler E4 by thermal siphon generate steam, with top-down liquid in stripper filler surface
Reverse flow simultaneously carries out abundant mass-and heat-transfer, stripper T1 flash overhead gas successively through subcooler E3, the second main heat exchanger E2 and
Cooling box after first main heat exchanger E1 re-heat, goes to battery limit (BL)；Stripper T1 bottom liquid throttles in the middle part of laggard denitrification column.
Liquid in denitrification column T2 tower reactor produces in denitrogenation tower reboiler E6 by unstripped gas and circulating nitrogen gas heating evaporation
Angry body filler surface reverse flow and carries out mass-and heat-transfer in denitrification column T2 with top-down liquid；Denitrification column T2 tower
Top gas body separates after the condensation of denitrogenation overhead condenser, and tower top richness nitrogen cooling box after plate-fin heat exchanger re-heat goes to boundary
Area；Denitrogenation overhead condenser being sent into after the throttling of denitrification column T2 bottom liquid, part cooling capacity being provided, domethanizing column T3 is entered after evaporation
Middle part.
Domethanizing column T3 tower bottom partially liq is heated by circulating nitrogen gas in demethanizer reboiler E9 and generates steam, with
Top-down liquid filler surface reverse flow and carries out mass-and heat-transfer in domethanizing column T3；It is obtained in domethanizing column T3 tower top
To CO product gas, successively the cooling box after the second main heat exchanger E2, the first main heat exchanger E1 re-heat, goes to battery limit (BL)；Domethanizing column T3
Tower bottom bottom methane-rich liquid pushes up successively multiple through the second main heat exchanger E2, the first main heat exchanger E1 after rich nitrogen mixes with denitrification column T2
It is used as fuel gas cooling box after heat, goes to battery limit (BL).
The cooling capacity of ice chest cryogenic separation is provided by the nitrogen compressor system of closed cycle.The circulation of nitrogen compressor outlet
Nitrogen enters ice chest, cools down in the first main heat exchanger E1, and as stripper T1 and denitrification column T2 tower bottom heat source, then remakes
For domethanizing column T3 tower bottom heat source, then after being cooled to -175 DEG C, into knockout drum V1, a part in knockout drum V1
Circulating liquid nitrogen throttling goes denitrification column T2 tower top to provide cooling capacity, and a part is used as domethanizing column T3 tower top cold source, another part throttling
It is successively taken off afterwards through subcooler E3, the second main heat exchanger E2 and the first main heat exchanger E1 rewarming into nitrogen compressor level-one entrance
The nitrogen of methane tower T3 tower top evaporation successively after the second main heat exchanger E2, the first main heat exchanger E1 re-heat, is sent into nitrogen compression
Machine secondary inlet after mixing with the circulating nitrogen gas after nitrogen compressor one stage of compression, carries out two-stage compression into nitrogen compressor,
The nitrogen of knockout drum V1 tank deck gas and the evaporation of denitrification column T2 tower top, successively through the second main heat exchanger E2 and the first main heat exchange
After device E1 rewarming, the three-level entrance into compressor is mixed with the circulating nitrogen gas after nitrogen compressor two-stage compression, through three-level pressure
Circulating nitrogen gas after contracting is exported from nitrogen compressor again to be exported, and is sent into ice chest, is provided cooling capacity for cryogenic separation.
The cold liquid nitrogen of benefit in liquid nitrogen storage the master of main heat exchanger first is delivered by benefit cold liquid nitrogen channel when driving to change
In hot device E1, the second main heat exchanger E2 and subcooler E3, cooling capacity, cooling box after re-heat, with nitrogen at room are provided for cryogenic separation
Battery limit (BL) out.
Since nitrogen compressor has multiple inlets can be according to heat-exchange network in the device operational process
Optimize situation, the nitrogen pressure for entering compressor is divided into two or three grades, so as to save the energy consumption of cryogenic separation.
In the technique of the utility model, select the double cold sources of products C O and liquid nitrogen, the products C O vaporization of this process makes full use
The cooling capacity of evaporation, optimizes heat-exchange network more, therefore reduces the cyclic nitrogen tolerance for freezing, and drops whole system energy consumption
It is low.
Embodiment described above is a kind of preferable scheme of the utility model, and so it is not practical to limit
It is novel.Those of ordinary skill in related technical field can be in the case where not departing from the spirit and scope of the utility model
It makes a variety of changes and modification.Therefore all mode technical solutions obtained for taking equivalent substitution or equivalent transformation, all fall within
In the protection scope of the utility model.
Claims (5)
1. a kind of device of the cryogenic separation CO gas of nitrogen cycle refrigeration, which is characterized in that including ice chest and nitrogen pressure
Contracting machine；The first main heat exchanger (E1), the second main heat exchanger (E2), subcooler (E3), stripper reboiler are equipped in the ice chest
(E4), denitrogenation tower reboiler (E6), domethanizing column condenser (E8), demethanizer reboiler (E9), knockout drum (V1), richness
Hydrogen flash tank (V2), stripper (T1), denitrification column (T2) and domethanizing column (T3)；
Unstripped gas input port enters ice chest by pipeline after purification, then flows sequentially through the first main heat exchanger (E1), stripper again
It boils device (E4), denitrogenation tower reboiler (E6), the second main heat exchanger (E2), subcooler (E3) and enters hydrogen rich gas flash tank (V2) afterwards,
The outlet of hydrogen rich gas flash tank (V2) tank deck hydrogen rich gas is by pipeline followed by subcooler (E3), the second main heat exchanger (E2), the
One main heat exchanger (E1) cooling box and passes to battery limit (BL) afterwards；The liquid outlet conduit of hydrogen rich gas flash tank (V2) tank bottom is divided into two branch
Road, a branch enter in the middle part of stripper (T1) by subcooler (E3), and another branch enters at the top of stripper (T1)；Stripping
The flashed vapour outlet of tower (T1) tower top is by pipeline followed by subcooler (E3), the second main heat exchanger (E2), the first main heat exchange
Device (E1) cooling box and passes to battery limit (BL) afterwards；Stripper (T1) bottom part liquid enters stripper reboiler (E4) by pipeline and changes
The lower part stripper (T1) is re-entered after thermal evaporation, the liquid outlet of stripper (T1) tower bottom connects denitrification column (T2) by pipeline
Middle part；
Denitrification column (T2) bottom part liquid re-enters denitrogenation after entering denitrogenation tower reboiler (E6) heat exchange evaporation by pipeline
The lower part tower (T2), the outlet of denitrification column (T2) overhead gas connect denitrogenation overhead condenser by pipeline, the bottom denitrification column (T2)
Liquid outlet is connected to denitrogenation overhead condenser by pipeline, and liquid is defeated by pipeline after evaporating in denitrogenation overhead condenser
Enter in the middle part of domethanizing column (T3)；
Domethanizing column (T3) bottom part liquid re-enters after entering demethanizer reboiler (E9) heat exchange evaporation by pipeline
The lower part demethanizer reboiler (E9)；The CO gas vent of domethanizing column (T3) tower top pass sequentially through the second main heat exchanger (E2),
First main heat exchanger (E1) cooling box and passes to battery limit (BL) afterwards；The methane-rich liquid outlet of domethanizing column (T3) tower bottom is cold with denitrogenation tower top
After the condensed rich nitrogen outlet of condenser is converged by pipeline, successively pass through the second main heat exchanger (E2), the first main heat exchanger
(E1) cooling box and battery limit (BL) is passed to afterwards；
The nitrogen compressor circulating nitrogen gas outlet by pipeline input ice chest, successively pass through the first main heat exchanger (E1),
Stripper reboiler (E4), denitrogenation tower reboiler (E6), demethanizer reboiler (E9) enter knockout drum (V1) afterwards, gas-liquid
The circulating liquid nitrogen outlet of knockout drum (V1) is divided into three tunnels, and for the first via by pipeline to denitrification column (T2) tower top, the second tunnel is logical
Piping is delivered to domethanizing column (T3) tower top, and third road is by pipeline followed by subcooler (E3), the second main heat exchanger
(E2), the first main heat exchanger (E1) cooling box and connects the level-one entrance of nitrogen compressor afterwards；The steaming of domethanizing column (T3) tower top
Hair nitrogen outlet cooling box and connects nitrogen afterwards followed by the second main heat exchanger (E2), the first main heat exchanger (E1) by pipeline
The secondary inlet of compressor；Knockout drum (V1) tank deck gas vent and the outlet of denitrification column (T2) tower top vaporized nitrogen gas pass through pipe
After road converges, then followed by the second main heat exchanger (E2), the first main heat exchanger (E1) cooling box and connect nitrogen compressor afterwards
Three-level entrance；
It mends cold liquid nitrogen channel and is externally entering ice chest, followed by the first main heat exchanger (E1), the second main heat exchanger (E2), supercooling
Device (E3) cooling box is to battery limit (BL).
2. the device of the cryogenic separation CO gas of nitrogen cycle refrigeration as described in claim 1, which is characterized in that described
Denitrogenation overhead condenser there are two, the first denitrogenation overhead condenser (E5) and the second denitrogenation overhead condenser (E7) are respectively set
In denitrification column (T2) tower top, parallel operation.
3. the device of the cryogenic separation CO gas of nitrogen cycle refrigeration as described in claim 1, which is characterized in that described
Purification after unstripped gas input port by pipeline connection molecule sieve adsorption system purification after unstripped gas export.
4. the device of the cryogenic separation CO gas of nitrogen cycle refrigeration as described in claim 1, which is characterized in that described
Stripper (T1), denitrification column (T2) and domethanizing column (T3) be packed tower.
5. the device of the cryogenic separation CO gas of nitrogen cycle refrigeration as described in claim 1, which is characterized in that described
The entrance in the cold liquid nitrogen channel of benefit connect liquid nitrogen storage.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108826831A (en) * | 2018-08-24 | 2018-11-16 | 杭州中泰深冷技术股份有限公司 | The device and technique of the cryogenic separation CO gas of nitrogen cycle refrigeration |
| CN114279168A (en) * | 2021-12-06 | 2022-04-05 | 杭州制氧机集团股份有限公司 | Cryogenic separation device for poly-generation of high-purity CO, hydrogen-rich gas and compressed natural gas from synthesis gas |
-
2018
- 2018-08-24 CN CN201821372042.8U patent/CN208751134U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108826831A (en) * | 2018-08-24 | 2018-11-16 | 杭州中泰深冷技术股份有限公司 | The device and technique of the cryogenic separation CO gas of nitrogen cycle refrigeration |
| CN108826831B (en) * | 2018-08-24 | 2023-09-29 | 杭州中泰深冷技术股份有限公司 | Device and process for cryogenic separation of carbon monoxide gas by nitrogen circulation refrigeration |
| CN114279168A (en) * | 2021-12-06 | 2022-04-05 | 杭州制氧机集团股份有限公司 | Cryogenic separation device for poly-generation of high-purity CO, hydrogen-rich gas and compressed natural gas from synthesis gas |
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