CN207662249U - A kind of strange low-temp methanol in Shandong washes low temperature cold recovery system - Google Patents
A kind of strange low-temp methanol in Shandong washes low temperature cold recovery system Download PDFInfo
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- CN207662249U CN207662249U CN201721511585.9U CN201721511585U CN207662249U CN 207662249 U CN207662249 U CN 207662249U CN 201721511585 U CN201721511585 U CN 201721511585U CN 207662249 U CN207662249 U CN 207662249U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B30/56—Heat recovery units
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Abstract
The utility model discloses a kind of strange low-temp methanols in Shandong to wash low temperature cold recovery system.Including desorber 1, the first liquid separation tank 2, the second liquid separation tank 3, First Heat Exchanger 4, the second heat exchanger 5, third heat exchanger 6, the 4th heat exchanger 7；There is the tail gas that vacuum flashing in desorber 1 goes out entrance to enter the progress liquid separation of the first liquid separation tank 2, first liquid separation tank 2 is equipped with 3 gaseous phase outlets, it is connected respectively with First Heat Exchanger 4, the second heat exchanger 5, third heat exchanger 6, exhaust gas of flash evaporation is divided into three parts, cold recovery is carried out respectively as the cooling medium of First Heat Exchanger 4, the second heat exchanger 5, third heat exchanger 6.Wherein third heat exchanger 6 is used to carry out a deep cooling, alternative stoste ammonia flash cooled+purified gas/CO to conversion gas265%~100% load of ammonia cooler in product gas cold recovery system.And realize effective recycling of low temperature cold.The utility model cold recovery rate is high, and resource utilization is high, and equipment operation is simple.
Description
Technical field
The utility model is related to petrochemical industry, coal chemical industry gas purifications to purify field, and work is washed more particularly to low-temp methanol
The cold recovery system of skill.
Background technology
Low-temp methanol washing process is widely used in the coalifications such as Large-scale Ammonia Plant, ammonia from coal, carbonylation synthesis, industrial hydrogen production
In work, petrochemical industry manufacturing enterprise.Methanol absorption is a kind of physics washing process, is that branch removes work at low temperature using methanol
Hydrogen sulfide in skill gas and carbon dioxide gas.
Methanol absorption CO2And H2S is an exothermic process, and the heat of release is needed through flashed vapour and additional ammonia ice maker
Cold etc. is provided to maintain system cold balancing.Low-temp methanol washes unit cold source：Circulating water, rich methanol low pressure
Flash distillation parsing CO2Gas generates cold, liquefied ammonia (propylene) decompression flash distillation refrigeration.Low-temp methanol absorbs CO in system2And H2S gas
After body, after vacuum flashing air lift, a large amount of flashed vapour releases during vacuum flashing, while releasing a large amount of low
Warm cold.
At present in the low-temp methanol washing process of lot of domestic and foreign, the comprehensive optimal control of low temperature cold is not implemented, and causes
A large amount of low temperature cold is recycled by waste heat (recirculated water return water, high temperature poor methanol) in system, causes the damage of high-order low temperature cold
It loses.In view of flashed vapour cold is huge, and the low temperature cold that methanol is washed needed for the gas absorption of unit in actual application is big
Part is freezed by ice maker to be provided.The operation of one side ice maker consumes a large amount of steam and energy consumption is caused to increase, while being examined after leakage in ammonia cooler
It is the practical problem that need to be solved to repair difficult and gas ammonia emission problem.
Conversion gas after transformed unit carbon monodixe conversion after carrying out liquid separation into liquid separation tank, is carried out through level-one deep cooling
Conversion gas temperature enters absorption tower after being reduced to -30 DEG C after secondary deep cooling cooling.Cold needed for conversion gas level-one deep cooling is main
Pass through liquefied ammonia flash distillation or propylene flash compressor refrigeration.Two level deep cooling passes through reclaiming clean gas and CO2Flashed vapour cold obtains.
Leading conversion gas cryogenics to be applied at present has：(1), ice maker refrigeration (ammonia cooler)+multiple flow cooler (transformation
Gas/purified gas/CO2)；(2), multiple flow cooler (conversion gas/purified gas/CO2/ tail gas)；(3), unitized exchanger：(transformation
Gas/purified gas) heat exchanger+(conversion gas/CO2) heat exchanger+(conversion gas/tail gas) heat exchanger.
At present the characteristics of technique and existing main problem
1) liquefied ammonia flash cooled+purified gas/CO2Product gas cold recovery technology
The technology is the physicochemical property using ammonia, the principle of low boiling point, liquid ammonia gasification refrigeration principle.Liquefied ammonia is logical in ammonia cooler
Cross decompression flash distillation heat absorption and generate cold, by enter low-temp methanol wash unit unstripped gas temperature reduce.Gas ammonia is compressed by one
It is recovered as liquefied ammonia through water cooler cooling after machine pressure-raising, sends ammonia cooler recycling back to again.This technology principle and flow scheme design letter
It is single, rationally recycle purified gas and CO2Low temperature cold in product gas, but there is no return other high-order colds in system completely
It receives, the waste of the high-order cold mainly in flashed vapour causes the energy consumption of device to increase.Simultaneously in ammonia cooler after leakage, unstripped gas
In hydrogen sulfide and carbon dioxide gas leak in ammonia cooler, make ammonia gas pipeline formed ammonium salt crystallization, block compressor runner,
Cause unit operation unstable；Scavenging efficiency can be caused to decline after leakage in ammonia cooler simultaneously, unstripped gas cryogenic separation effect is deteriorated,
It is deteriorated so as to cause assimilation effect, the production at high load of confining device；Excision maintenance will also result in liquefied ammonia row after leakage in ammonia cooler
Journey is let off, environmental pollution can be caused to a certain extent.It needs to increase a set of propylhomoserin flare system simultaneously, investment is larger.
2) multithread stock cooler (traditional low temperature methanol washing raw gas cooler)
I.e. raw material makes shell side leave with rage, and absorption tower exports purified gas (or by liquid nitrogen washing come some processes gas), CO2Product gas, tail
Three strands of gases of gas walk tube side.Since existing multiple flow as described above is around heat exchange of heat pipe, unstripped gas all walks shell side, and due to
Unstripped gas high voltage nature, thus tube sheet must use high pressure forging, shell also plank require it is also very high, so as to cause shell side material at
This is very high, and design and difficulty of processing are big.
3) unitized exchanger conversion gas cooling technology
Chinese patent (publication number：CN202109785U a kind of low temperature washing device for methanol raw material air cooling system) is disclosed,
It is specifically disclosed respectively flows transformation Gas Cooler stock and is rationally split, and the conversion gas of high pressure is divided into three parts, respectively with
Purified gas, carbon dioxide product gas and the exhaust gas of flash evaporation of low temperature are sent to absorption tower summarizing after exchanging heat respectively.Specific implementation is such as
Under：Converting gas source, there are three raw material gas transmission pipe roads, first conversion gas conveyance conduit and first to convert Gas Cooler
Shell side inlet is connected to, and the shell-side outlet of the first transformation Gas Cooler is connected to by pipeline with corresponding upstream device；Second
Conversion gas conveyance conduit is connected to the tube-side inlet of the second feed gas chiller, and the tube side of the second transformation Gas Cooler goes out
Mouth is connected to by pipeline with corresponding upstream device；The tube side of Article 3 conversion gas delivery pipe road and third transformation Gas Cooler
Entrance is connected to, and the outlet of third conversion gas cooler tube side is connected to by pipeline with corresponding upstream device；Absorption tower it is net
Change gas output channel to be connected to the tube-side inlet of the first transformation Gas Cooler, and the tube side outlet of the first transformation Gas Cooler is logical
Piping is connected to corresponding upstream device；The shell of the tail gas output channel of low temperature washing device for methanol and the second transformation Gas Cooler
Journey entrance is connected to, and the shell-side outlet of the second transformation Gas Cooler is connected to by pipeline with corresponding upstream device；Low temperature first
The shell side inlet that the carbon dioxide product gas output channel of alcohol cleaning device converts Gas Cooler with third is connected to, and third converts
The shell-side outlet of Gas Cooler is connected to by pipeline with corresponding upstream device.The technology is by the prior art around heat exchange of heat pipe
Three single stream stocks are changed to, high pressure gas is allowed to walk tube side, low-pressure gas walks shell side, to reduce the cost of feed gas chiller,
Each grade cold in system is fully recycled.But the disadvantage is that taking up an area greatly, equipment dispersion, operation difficulty is larger, conversion gas distribution
It is uneven easily to cause temperature fluctuation after exchanging heat big.
There is the big problem of high energy consumption, environmental protection pressure in large-scale coal chemical industry enterprises, with the requirement of national clean manufacturing, each device
With can must more reasonably optimizing, especially the GOOD TASTE cold of itself Optimum Synthesis utilize, become grinding for current people
Study carefully Main way.
Utility model content
The utility model is in view of the deficiencies of the prior art, it is desirable to provide a kind of strange low-temp methanol in the Shandong that cold recovery rate is high is washed
Low temperature cold recovery system.The utility model is directed to original liquefied ammonia flash cooled+purified gas/CO2Product gas cold recovery system
System is transformed, it is original to conversion gas carry out a deep cooling ammonia cooler on the basis of parallel connection add wound tube heat exchanger, wherein
Cooling medium in wound tube heat exchanger, using a part of exhaust gas of flash evaporation generated in desorber.Wound tube heat exchanger is alternative
The load of former ammonia cooler 65%~100%, the utility model cold recovery rate is high, and resource utilization is high, and equipment operation is simple.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, including desorber 1, the first liquid separation tank 2,
Second liquid separation tank 3；First Heat Exchanger 4, the second heat exchanger 5, third heat exchanger 6, the 4th heat exchanger 7；Decompression in desorber 1 is dodged
The tail gas steamed there is entrance to enter the first liquid separation tank 2 carry out liquid separation, and the first liquid separation tank 2 is equipped with 3 gaseous phase outlets, respectively the
One outlet, second outlet, third outlet；Wherein first outlet is connected by pipeline with First Heat Exchanger 4, and second outlet passes through pipe
Line is connected with the second heat exchanger 5, and third outlet is connected by pipeline with third heat exchanger 6.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, the First Heat Exchanger 4 for reducing
Into the temperature of the air lift nitrogen of desorber 1.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, and the cooling of the First Heat Exchanger 4 is situated between
Matter is to enter the exhaust gas of flash evaporation of First Heat Exchanger 4 by pipeline from 2 first outlet of the first liquid separation tank.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, second heat exchanger 5 for reducing
The sour gas temperature that hot recycling tower comes out.It is set to reach liquid separation effect in subsequent liquid separation tank.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, and the cooling of second heat exchanger 5 is situated between
Matter is to enter the exhaust gas of flash evaporation of the second heat exchanger 5 by pipeline from 2 second outlet of the first liquid separation tank.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, and the third heat exchanger 6 is around tubular type
Heat exchanger.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, the third heat exchanger 6 for reducing
The temperature of conversion gas carries out a deep cooling to conversion gas.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, and the cooling of the third heat exchanger 6 is situated between
Matter is that the exhaust gas of flash evaporation for entering third heat exchanger 6 by pipeline is exported from 2 third of the first liquid separation tank.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, further includes the 4th heat exchanger 7, and described
Four heat exchangers 7 are wound tube heat exchanger.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, and the 4th heat exchanger 7 is equipped with and solution
Inhale the connected pipeline passway of tower 1, the CO that the vacuum flashing in desorber 1 goes out2After product gas enters the progress liquid separation of the second liquid separation tank 3
Enter the cooling medium that heat exchanger 7 is used as heat exchanger 7 by pipeline passway；Leave CO simultaneously2Absorb tower top it is washed after
Low temperature purification gas enters the cooling medium that heat exchanger 7 is used as heat exchanger 7 by another pipeline passway.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, and the 4th heat exchanger 7 is changed with third
Hot device 6 is connected in series with, and the conversion gas in third heat exchanger 6 after a deep cooling enters the 4th heat exchanger 7, by the 4th heat exchanger
7 carry out secondary deep cooling.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, and the 4th heat exchanger 7 is equipped with outlet
It is connected with hydrogen sulfide absorption tower by pipeline, the conversion gas after secondary deep cooling is carried out by the 4th heat exchanger 7, sulphur is entered by pipeline
Change hydrogen absorption tower.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, the exhaust gas of flash evaporation after cold recovery
Enter tail gas washing tower by pipeline.Exhaust gas of flash evaporation is through recycling methanol and meet the requirement of environmental protection heel row vacancy in tail gas washing tower
Reason.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, the CO after cold recovery2Product
Gas some is sent to dry ice device processed, a part of emptying process by pipeline.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, the purification pneumatic transmission after cold recovery
Toward hydrogen purification device.
In the utility model, third heat exchanger 6 is in parallel with the ammonia cooler in original design, according to the processing need of conversion gas
It asks, the load of alternative ammonia cooler 65%~100%.
In desorber described in the utility model the decompression of -25 DEG C~35 DEG C carbonated methanol of a part flash off -
50 DEG C `~-65 DEG C pure CO2As CO2Product gas recycles, and another part decompression flashes and passes through N2Air lift goes out major part
CO2And H2S, H2S is reabsorbed by methanol, CO2And N2Mixed gas become exhaust gas of flash evaporation, temperature be -50 DEG C of `~-65
℃。
The advantage of the utility model is：
Stoste ammonia flash cooled+purified gas/CO2Product gas cold recovery technology, conversion gas reach through the deep cooling that cools down twice
Enter the temperature requirement of hydrogen sulfide absorption tower；Low-flash tail gas is most of after air lift nitrogen and sour gas recovery section cold
Cold does not recycle completely, is finally taken away by recirculated water, and low-flash tail gas cold recovery is not thorough；Draw after leakage in ammonia cooler simultaneously
The conversion gas overtemperatute risen, constrains the production at high load of device.
The utility model optimizes it transformation.The low temperature exhaust gas that desorber vacuum flashing goes out is separated one and entered again
The conversion gas that methanol washes unit carries out a deep cooling, in parallel with existing ammonia cooler, needs may replace according to actual motion existing
The load of ammonia cooler 65%~100%, final low temperature exhaust gas temperature are improved by -60 DEG C or so to 20 DEG C or so of room temperature.Both it recycled
The cold of existing low-flash tail gas achievees the purpose that reduce mating ammonia ice maker load, at the same reduce in ammonia cooler leakage or
The risk of system unplanned shutdown caused by leakage in newly-increased wound tube heat exchanger, can the long period of ensuring equipment, heavy-duty service.
The utility model reduces the air lift nitrogen into flash column 1 by -60 DEG C or so of low-flash tail gas cold respectively
Temperature, sour gas temperature and the conversion gas deep cooling of progress that unit is washed to methanol；It is produced simultaneously using the carbon dioxide of low temperature
Product gas carries out secondary deep cooling, reduces the conversion gas temperature into absorption tower.The step of high-order low temperature cold recycles, and realizes high-order low
The abundant recycling of warm cold, has saved the steam consumption of auxiliary cooling ice maker, realizes the maximization of the utilization of resources.Simultaneously
The consumption that can avoid ice maker refrigerant (liquefied ammonia) reduces the risk of emission intensity pollution environment, and the another flow scheme design is simple, equipment
It takes up little area, compact arrangement of equipment, it is easy to operate etc..
The utility model process system embodies following benefit in the process of running：
Result of calculation below is calculated according to the actual mechanical process of embodiment 1 and is obtained：
1) after coming into operation, recyclable flashed vapour (tail gas, CO2) in low temperature cold be 1163KW, keep the device energy sharp
With more rationally；Energy, that is, steam consumption needed for the alternative stoste ammonia flash gas compression condensation of this strand of cold of recycling simultaneously, just
Step calculates about 2.5t/h.
2) after by recycling flashed vapour cold, the temperature of the flashed vapour into room temperature equipment is improved, it is long to solve the equipment
Phase is in the risk of cold operation, has ensured the long period safe and stable operation of equipment；
3) tail gas/CO that new technology uses2Ammonia cooler in/conversion gas wound tube heat exchanger partial alternative prior art flow
65% or so load, reduce existing ammonia cooler operating load, after heat exchanger leaks, existing depth can be cut out completely
It is cold, solve the unplanned parking risk of device caused by leakage in equipment；
4) recycling methanol completely washes unit flashed vapour cold, and it is more reasonable to be that low-temp methanol washes unit cryogenic energy utilization, further
Reduce the ammonia ice maker load of auxiliary, solving device summer heavy-duty service bottleneck.
Description of the drawings
Fig. 1 is the structural schematic diagram of low-temperature methanol washing tail-gas cold recovery system provided by the utility model.
Specific implementation mode
Fig. 1 shows that the strange low-temp methanol in the Shandong of the utility model washes the part-structure schematic diagram of low temperature cold recovery system,
Only showing the utility model compared with the existing technology has the part of innovation, and the structure of rest part and function and existing skill
The low temperature washing device for methanol of art is identical, and those skilled in the art will be appreciated that the structure and function of the part, therefore no longer repeat.
A kind of strange low-temp methanol in Shandong of the utility model washes low temperature cold recovery system, including desorber 1, the first liquid separation tank 2,
Second liquid separation tank 3, First Heat Exchanger 4, the second heat exchanger 5, third heat exchanger 6, the 4th heat exchanger 7；Decompression in desorber 1 is dodged
The tail gas steamed, which is equipped with entrance and enters the first liquid separation tank 2, carries out liquid separation, and the first liquid separation tank 2 is equipped with 3 gaseous phase outlets, respectively the
One outlet, second outlet, third outlet；Wherein first outlet is connected by pipeline with First Heat Exchanger 4, and second outlet passes through pipe
Line is connected with the second heat exchanger 5, and third outlet is connected by pipeline with third heat exchanger 6.The First Heat Exchanger 4 for reducing
Into the temperature of the air lift nitrogen of desorber 1；Second heat exchanger 5 in rich hydrogen sulfide methanol through hot recycling tower for reducing going out
The sour gas temperature come；The third heat exchanger 6 be wound tube heat exchanger, third heat exchanger 6 for reducing conversion gas temperature
Degree carries out a deep cooling to conversion gas；4th heat exchanger 7 is wound tube heat exchanger, is connected in series with third heat exchanger 6,
4th heat exchanger 7 is equipped with the pipeline passway being connected with desorber 1, the CO that the vacuum flashing in desorber 1 goes out2Product gas into
Enter after the second liquid separation tank 3 carries out liquid separation and the cooling medium that heat exchanger 7 is used as heat exchanger 7 entered by pipeline passway；It leaves simultaneously
CO2Absorb tower top it is washed after low temperature purification gas the cooling that heat exchanger 7 is used as heat exchanger 7 is entered by another pipeline passway
Medium；Conversion gas being crossed through a deep cooling in third heat exchanger 6 and entering the 4th heat exchanger 7, secondary depth is carried out by the 4th heat exchanger 7
It is cold；4th heat exchanger 7 is additionally provided with outlet and is connected with absorption tower by pipeline, after carrying out secondary deep cooling by the 4th heat exchanger 7
Conversion gas hydrogen sulfide absorption tower is entered by pipeline.Exhaust gas of flash evaporation after cold recovery enters washing tail gas by pipeline
Tower.CO after cold recovery2Product gas some is sent to dry ice device processed, a part of emptying process by pipeline.By
Purified gas after cold recovery is sent to hydrogen purification device.
Concrete operations flow is as follows：
- 63.9 DEG C of the exhaust gas of flash evaporation (CO that desorber 1 comes out2、N2), into the first liquid separation tank 2, pass through the first liquid separation
3 gaseous phase outlets in tank 2, the exhaust gas of flash evaporation of first outlet are sent to First Heat Exchanger 4 by pipeline and carry out cold recovery, will be into
The air lift nitrogen that row enters desorber 1 is down to -30 DEG C from 40 DEG C；The exhaust gas of flash evaporation of second outlet is sent to the second heat exchanger by pipeline
5 carry out cold recovery, and the sour gas that hot recycling tower comes out is down to -40 DEG C from 26 DEG C；The exhaust gas of flash evaporation of third outlet passes through
Pipeline is sent to third heat exchanger 6 and carries out cold recovery, and the conversion gas that will enter the converter unit of third heat exchanger 6 carries out once deeply
It is cold so that conversion gas is down to 7 DEG C from 25 DEG C；And the exhaust gas of flash evaporation temperature after cold recovery reaches 20 DEG C or so and send to tail gas
Scrubbing tower；In addition by -60 DEG C flashed off in desorber of CO2Product gas and from CO2Absorb tower top it is washed after-
51.5 DEG C of purified gas are sent to the 4th heat exchanger 7 and carry out cold recovery, to deep cooling of process from third heat exchanger 6 out
Conversion gas carries out secondary deep cooling so that the temperature of conversion gas is down to -29.7 DEG C, and the conversion gas after secondary deep cooling enters vulcanization
Hydrogen absorption tower, the CO after cold recovery2Product gas temperature reaches 20 DEG C and is supplied to dry ice device processed, and superfluous some is arranged
It manages in vacancy.Purified gas temperature after cold recovery is promoted to 40 DEG C and is sent into follow-up hydrogen purification device.
Claims (12)
1. a kind of strange low-temp methanol in Shandong washes low temperature cold recovery system, including desorber (1), the first liquid separation tank (2)；First heat exchange
Device (4), the second heat exchanger (5), it is characterised in that：Further include third heat exchanger (6)；What the vacuum flashing in desorber (1) went out
Tail gas have entrance enter the first liquid separation tank (2) carry out liquid separation, the first liquid separation tank (2) be equipped with 3 gaseous phase outlets, respectively first
Outlet, second outlet, third outlet；Wherein first outlet is connected by pipeline with First Heat Exchanger (4), and second outlet passes through pipe
Line is connected with the second heat exchanger (5), and third outlet is connected by pipeline with third heat exchanger (6).
2. the strange low-temp methanol in a kind of Shandong according to claim 1 washes low temperature cold recovery system, it is characterised in that：Described
One heat exchanger (4) for reducing enter desorber (1) air lift nitrogen temperature.
3. the strange low-temp methanol in a kind of Shandong according to claim 1 or 2 washes low temperature cold recovery system, it is characterised in that：The
The cooling medium of one heat exchanger (4) is the flash distillation for entering First Heat Exchanger (4) by pipeline from the first liquid separation tank (2) first outlet
Tail gas.
4. the strange low-temp methanol in a kind of Shandong according to claim 1 washes low temperature cold recovery system, it is characterised in that：Described
The temperature for the sour gas that two heat exchangers (5) come out for reducing hot recycling tower.
5. the strange low-temp methanol in a kind of Shandong according to claim 1 or 4 washes low temperature cold recovery system, it is characterised in that：Institute
The cooling medium for stating the second heat exchanger (5) is to enter the second heat exchanger (5) from the first liquid separation tank (2) second outlet by pipeline
Exhaust gas of flash evaporation.
6. the strange low-temp methanol in a kind of Shandong according to claim 1 washes low temperature cold recovery system, it is characterised in that：Described
Three heat exchangers (6) are wound tube heat exchanger.
7. the strange low-temp methanol in a kind of Shandong according to claim 1 washes low temperature cold recovery system, it is characterised in that：Described
Three heat exchangers (6) carry out a deep cooling for reducing the temperature of conversion gas to conversion gas.
8. the strange low-temp methanol in a kind of Shandong according to claim 1 or claim 7 washes low temperature cold recovery system, it is characterised in that：Institute
The cooling medium for stating third heat exchanger (6) is to export to enter third heat exchanger (6) by pipeline from first liquid separation tank (2) third
Exhaust gas of flash evaporation.
9. the strange low-temp methanol in a kind of Shandong according to claim 1 washes low temperature cold recovery system, it is characterised in that：Including
Four heat exchangers (7), the 4th heat exchanger (7) are wound tube heat exchanger.
10. the strange low-temp methanol in a kind of Shandong according to claim 9 washes low temperature cold recovery system, it is characterised in that：It is described
4th heat exchanger (7) is equipped with the pipeline passway being connected with desorber (1), the CO that the vacuum flashing in desorber (1) goes out2Product gas
The cooling medium that heat exchanger (7) is used as heat exchanger (7) is entered by pipeline passway after carrying out liquid separation into the second liquid separation tank (3)；
Leave simultaneously CO2 absorb tower top it is washed after low temperature purification gas heat exchanger (7) entered by another pipeline passway be used as and change
The cooling medium of hot device (7).
11. the strange low-temp methanol in a kind of Shandong according to claim 9 washes low temperature cold recovery system, it is characterised in that：It is described
4th heat exchanger (7) is connected in series with third heat exchanger (6), the conversion gas in third heat exchanger (6) after a deep cooling into
Enter the 4th heat exchanger (7), secondary deep cooling is carried out by the 4th heat exchanger (7).
12. the strange low-temp methanol in a kind of Shandong according to claim 9 washes low temperature cold recovery system, it is characterised in that：It is described
4th heat exchanger (7) is equipped with outlet and is connected with hydrogen sulfide absorption tower by pipeline, after carrying out secondary deep cooling by the 4th heat exchanger (7)
Conversion gas hydrogen sulfide absorption tower is entered by pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721511585.9U CN207662249U (en) | 2017-11-13 | 2017-11-13 | A kind of strange low-temp methanol in Shandong washes low temperature cold recovery system |
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| CN201721511585.9U CN207662249U (en) | 2017-11-13 | 2017-11-13 | A kind of strange low-temp methanol in Shandong washes low temperature cold recovery system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109467049A (en) * | 2018-11-22 | 2019-03-15 | 中石化南京工程有限公司 | A kind of transform method and device of energy coupling |
| CN110093191A (en) * | 2019-04-19 | 2019-08-06 | 崔静思 | A kind of low-temp methanol washes the recyclable device and method of effective gas in the process |
-
2017
- 2017-11-13 CN CN201721511585.9U patent/CN207662249U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109467049A (en) * | 2018-11-22 | 2019-03-15 | 中石化南京工程有限公司 | A kind of transform method and device of energy coupling |
| CN110093191A (en) * | 2019-04-19 | 2019-08-06 | 崔静思 | A kind of low-temp methanol washes the recyclable device and method of effective gas in the process |
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