CN109405412A - A kind of processing method and its deep condensation device of the fixed gas suitable for batch polypropylene plant production technology - Google Patents
A kind of processing method and its deep condensation device of the fixed gas suitable for batch polypropylene plant production technology Download PDFInfo
- Publication number
- CN109405412A CN109405412A CN201710702910.8A CN201710702910A CN109405412A CN 109405412 A CN109405412 A CN 109405412A CN 201710702910 A CN201710702910 A CN 201710702910A CN 109405412 A CN109405412 A CN 109405412A
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- Prior art keywords
- fixed gas
- propylene
- production technology
- processing method
- gas
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 19
- -1 polypropylene Polymers 0.000 title claims abstract description 16
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 15
- 238000005516 engineering process Methods 0.000 title claims abstract description 14
- 238000003672 processing method Methods 0.000 title claims abstract description 13
- 238000009833 condensation Methods 0.000 title claims abstract description 11
- 230000005494 condensation Effects 0.000 title claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 66
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 42
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 42
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001257 hydrogen Substances 0.000 claims abstract description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 238000011084 recovery Methods 0.000 claims abstract description 7
- 239000007791 liquid phase Substances 0.000 claims abstract description 5
- 238000010926 purge Methods 0.000 claims abstract description 3
- 238000005057 refrigeration Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 abstract description 6
- 239000003507 refrigerant Substances 0.000 description 13
- 239000000047 product Substances 0.000 description 6
- 239000008246 gaseous mixture Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- 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
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/005—Processes comprising at least two steps in series
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/144—Purification; Separation; Use of additives using membranes, e.g. selective permeation
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to PP Production Technology technical fields, and in particular to a kind of processing method and its deep condensation device of the fixed gas suitable for batch polypropylene plant production technology.Including batch liquid phase bulk PP production line, fixed gas circulating production line in the device always in the production technology, the processing method is by exporting fixed gas, with the mode of deep condensation by the propylene recovery in fixed gas, separately hydrogen is recycled by recyclable device, nitrogen purge.Advantages of the present invention is to completely eliminate tank field high-voltage safety hidden danger, and tank field pressure has original 1.9Mpa to be reduced to 1.0Mpa, significantly reduces the fixed gas content in device, and polymerization reaction is no longer influenced by fixed gas, and Hydrogen Energy is added accurately to measure.
Description
Technical field
The invention belongs to PP Production Technology technical fields, and in particular to one kind is suitable for batch polypropylene plant and produces work
The processing method of fixed gas and its deep condensation device in skill.
Background technique
Since batch liquid phase bulk polypropylene plant is because of the limitation of technique, there can be a large amount of fixed gases blending in device
In propylene recovery gas, whole device pressure superelevation is caused, and the presence of fixed gas influences device polymerization reaction, especially summer
Season production, spherical tank pressure is close to 2.0Mpa, and the safety valve jumping up pressure 2.15Mpa of spherical tank, fixed gas follow always in the device
Ring, the main component of fixed gas is nitrogen, hydrogen in propylene, because propylene is raw material, can not scene empty, and hydrogen is as polymerizeing
The molecular weight regulator of reaction, adjusts product melt index, and a single propylene is recycled to paradigmatic system, acts as in the polymerization
With staff is unable to measure this part, and product grade is caused to decline, and cannot produce satisfactory product, gives product matter
Amount system causes tremendous influence.Once fixed gas content is exceeded, polypropylene polymerization reaction system will be destroyed, entire polypropylene
Process units will face paralysis, bring about great losses.
Summary of the invention
It is an object of the invention to provide a kind of suitable for batch polypropylene plant production work in view of the above problems
The advantages of processing method of fixed gas in skill, acquirement, tank field pressure had original to completely eliminate tank field high-voltage safety hidden danger
1.9Mpa is reduced to 1.0Mpa, significantly reduces the fixed gas content in device, and polymerization reaction is no longer influenced by fixed gas,
Hydrogen Energy is added accurately to measure.
Technical scheme is as follows:
A kind of processing method of the fixed gas suitable for batch polypropylene plant production technology, including batch liquid phase bulk polypropylene
Production line, fixed gas circulating production line in the device always in the production technology, the processing method is by leading fixed gas
Out, the propylene recovery in fixed gas is separately recycled hydrogen by recyclable device, nitrogen purge with the mode of deep condensation.
Preferably, the method by by the fixed gas in device by propylene deep condensation, not by the mixing of high pressure
After solidifying gas enters forecooler and condenser, a part of propylene is condensed out into propylene tank, is beaten liquid propylene with raw liquor pump
Enter spherical tank recycling, uncondensable propylene enters membrane module after forecooler is heated, and the organic gas that will transmit through film is led
Gas holder recycling and reusing does not enter next recovery system by regulating valve by the gas of film and separates again, hydrogen recycled, nitrogen
Into live vent line.
Propylene deep condensation-separating film module equipment includes heat exchanger, fluid reservoir and I and II refrigeration system.
Preferably, the I and II refrigeration system includes refrigeration compressor, cooler, fluid reservoir, filter, expansion
Valve, evaporator.Refrigeration compressor is by the refrigerant vapor compression of low-temp low-pressure at the gaseous refrigerant of high temperature and pressure, high temperature and pressure
Refrigerant flow into water-cooled condenser, the heat of refrigerant will be taken away by water, while refrigerant is condensed into liquid, then passes through
Fluid reservoir, device for drying and filtering reach expansion valve, pass through reducing pressure by regulating flow in this refrigerant, become low temperature and low pressure steam, pressed by refrigeration
The sucking of contracting machine, realizes refrigeration cycle.Filter removes liquid, gaseous impurities.
Preferably, the cooler includes forecooler and evaporator.Gaseous mixture into this system initially enters pre-cooling
Device enters level-one evaporator after gas is pre-chilled in forecooler, gaseous mixture is cooled to -5 ~ 10 DEG C in first-stage condenser,
The vapor partial pressure of propylene will substantially exceed its corresponding saturated vapor partial pressure and liquefy, and propylene is condensed into liquid recycling, is not condensed
The gas to get off is entering secondary condenser, is cooled to -40 ~ -45 DEG C, the liquid condensed out enters fluid reservoir, and second level is cold
Condenser fixed gas is in the cold source as forecooler.
By seperation film to it is different other with different penetration speeds, the organic gas (propylene) in gaseous mixture compares air
More preferably by film, so that through gas degassing cabinet is touched to obtain, recycling and reusing (does not contain nitrogen, hydrogen mainly by the gas of film
Gas) by regulating valve enter next recovery system separate again, realize hydrogen recycling, nitrogen enter live evacuated tube to realize to
The effect of device decompression, solves the fixed gas circulatory problems of polypropylene plant, more solves the problems, such as that fixed gas influences reflection,
It more solves device and is constantly in high voltage operation state, solve the major accident hidden danger.
The beneficial effects of the present invention are:
Of the invention novel in design, effect is obvious, safely and effectively.The invention by by the fixed gas in device pass through third
Alkene deep condensation, after the mixing fixed gas of high pressure is entered forecooler and condenser, a part of propylene is condensed out into propylene
Liquid propylene is squeezed into spherical tank with raw liquor pump and recycled by storage tank, and uncondensable propylene enters film group after forecooler is heated
Part, the organic gas that will transmit through film lead gas holder recycling and reusing, do not enter next recycling by regulating valve by the gas of film
System separates again, and hydrogen is recycled, and nitrogen enters live vent line.
The applicant augments propylene deep condensation-separating film module equipment by using this method, in normal productive process
Equipment runs smoothly, reliably, completely eliminates tank field high-voltage safety hidden danger, and tank field pressure has original 1.9Mpa to be reduced to 1.0Mpa,
The fixed gas content in device is significantly reduced, and polymerization reaction is no longer influenced by fixed gas, and Hydrogen Energy is added accurately to measure, it is raw
It produces product grade all to have met the requirements of the customers, reduces device tank field high-pressure work state, reduce production equipment, reclaimer
Workload improves product quality.
In addition, the method for the present invention principle is reliable, step is simple, has very extensive application prospect.
It can be seen that compared with prior art, the present invention having substantive features and progress, the beneficial effect implemented
It is obvious.
Figure of description
Fig. 1 is production technological process of the invention.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawing and by specific embodiment, and following embodiment is to the present invention
Explanation, and the invention is not limited to following implementation.
A kind of processing method of the fixed gas suitable for batch polypropylene plant production technology, including batch liquid phase bulk are poly-
Propylene producing line, circulating production line, this method pass through the fixed gas in device to fixed gas in the device always in production technology
Propylene deep condensation, after the mixing fixed gas of high pressure is entered forecooler and condenser, a part of propylene is condensed out into third
Liquid propylene is squeezed into spherical tank with raw liquor pump and recycled by alkene storage tank, and uncondensable propylene enters film after forecooler is heated
Component, the organic gas that will transmit through film lead gas holder recycling and reusing, are not entered next time by the gas of film by regulating valve
Receipts system separates again, and hydrogen is recycled, and nitrogen enters live vent line.
Equipment includes heat exchanger, fluid reservoir and I and II refrigeration system.
I and II refrigeration system includes refrigeration compressor, cooler, fluid reservoir, filter, expansion valve, evaporator.Refrigeration
For compressor by the refrigerant vapor compression of low-temp low-pressure at the gaseous refrigerant of high temperature and pressure, the refrigerant of high temperature and pressure flows into water
The heat of cool condenser, refrigerant will be taken away by water, while refrigerant is condensed into liquid, then by fluid reservoir, dried
Filter reaches expansion valve, passes through reducing pressure by regulating flow in this refrigerant, becomes low temperature and low pressure steam, sucked by refrigeration compressor, realize
Refrigeration cycle.Filter removes liquid, gaseous impurities.
Cooler includes forecooler and evaporator.Gaseous mixture into this system initially enters forecooler, in forecooler
Enter level-one evaporator after gas is pre-chilled, gaseous mixture is cooled to -5 ~ 10 DEG C in first-stage condenser, the vapor partial pressure of propylene
Its corresponding saturated vapor partial pressure will be substantially exceeded and liquefy, propylene is condensed into liquid and recycles, the gas not being condensed into
Enter secondary condenser, be cooled to -40 ~ -45 DEG C, the liquid condensed out enters fluid reservoir, and secondary condenser fixed gas is being made
For the cold source of forecooler.
The density of propylene at different temperatures of table 1
(propylene and nitrogen mixture, propylene pressure tank are 2.2MPa)
Working-flow: when gas inlet pressure reaches freezing group setup working pressure in spherical tank, system is transported automatically
Turn, gas first in the processing of forecooler device, open with the starting two of equipment by refrigerant pump, in air inlet density of propylene be 60 ~
90%, after forecooler and condenser, a part of propylene condenses out (temperature of condenser is set as -45 DEG C), and not solidifying is mixed
It closes wherein, density of propylene is about 30%, membrane module is entered after forecooler is heated 10 ~ 20 DEG C, when Propylene Spherical Tanks air inlet
When pressure is down to setting value, outlet regulating valve and tail gas pressure-regulating valve are closed, and per-meate side electrically operated valve is in membrane module pressure drop
Closed after to 0.1MPa, system standby, in system standby, osmotic lateral pressure be more than after 0.4MPa system will call the police and shut down,
Whole device control is controlled using PLC, and wherein refrigeration compressor is automatically turned on according to the temperature in regenerator.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, all at this
Done any modifications, equivalent replacements, and improvements etc., should be included in protection scope of the present invention within the spirit and principle of invention
Within.
Claims (5)
1. a kind of processing method of the fixed gas suitable for batch polypropylene plant production technology, including batch liquid phase bulk poly- third
Alkene production line, fixed gas circulating production line in the device always in the production technology, the processing method is by by fixed gas
Export, with the mode of deep condensation by the propylene recovery in fixed gas, is separately recycled hydrogen by recyclable device, nitrogen purge.
2. a kind of processing method of the fixed gas suitable for batch polypropylene plant production technology, it is characterised in that: the method is logical
It crosses and the fixed gas in device is passed through into propylene deep condensation, after the mixing fixed gas of high pressure is entered forecooler and condenser, one
Part propylene is condensed out into propylene tank, and liquid propylene is squeezed into spherical tank with raw liquor pump and is recycled, uncondensable propylene warp
It crosses and enters membrane module after forecooler is heated, the organic gas that will transmit through film leads gas holder recycling and reusing, do not pass through the gas of film
Body enters next recovery system by regulating valve and separates again, hydrogen is recycled, nitrogen enters live vent line.
3. a kind of propylene deep condensation-seperation film of the fixed gas processing method suitable for above-mentioned batch polypropylene plant production technology
Component devices, it is characterised in that: the equipment includes heat exchanger, fluid reservoir and I and II refrigeration system.
4. propylene deep condensation-separating film module equipment according to claim 2, it is characterised in that: the I and II system
Cooling system includes refrigeration compressor, cooler, fluid reservoir, filter, expansion valve, evaporator.
5. propylene deep condensation-separating film module equipment according to claim 2, it is characterised in that: the cooler packet
Include forecooler and evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702910.8A CN109405412A (en) | 2017-08-16 | 2017-08-16 | A kind of processing method and its deep condensation device of the fixed gas suitable for batch polypropylene plant production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702910.8A CN109405412A (en) | 2017-08-16 | 2017-08-16 | A kind of processing method and its deep condensation device of the fixed gas suitable for batch polypropylene plant production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109405412A true CN109405412A (en) | 2019-03-01 |
Family
ID=65454544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710702910.8A Pending CN109405412A (en) | 2017-08-16 | 2017-08-16 | A kind of processing method and its deep condensation device of the fixed gas suitable for batch polypropylene plant production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109405412A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1160000A1 (en) * | 2000-05-31 | 2001-12-05 | Reinhold Kunze | Method and apparatus for the recuperation of nitrogen and/or propylene during the polypropylene production |
| CN202892961U (en) * | 2012-10-24 | 2013-04-24 | 浙江鸿基石化有限公司 | Recovery device for tail gas generated in polypropylene production process |
| CN203635020U (en) * | 2013-08-20 | 2014-06-11 | 宁夏宝塔石化科技实业发展有限公司 | Separation and recycling device for tail gas produced by polypropylene |
| CN104923029A (en) * | 2015-06-01 | 2015-09-23 | 中国寰球工程公司 | Method for recovering exhaust gas according to polyolefin gas phase method |
| CN105004140A (en) * | 2015-07-30 | 2015-10-28 | 大连欧科膜技术工程有限公司 | Polypropylene tail gas recovery device and recovery method |
| CN204746019U (en) * | 2015-05-25 | 2015-11-11 | 南京都乐制冷设备有限公司 | Propylene circulation recovery unit of usefulness is retrieved to tail gas in polypropylene production |
-
2017
- 2017-08-16 CN CN201710702910.8A patent/CN109405412A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1160000A1 (en) * | 2000-05-31 | 2001-12-05 | Reinhold Kunze | Method and apparatus for the recuperation of nitrogen and/or propylene during the polypropylene production |
| CN202892961U (en) * | 2012-10-24 | 2013-04-24 | 浙江鸿基石化有限公司 | Recovery device for tail gas generated in polypropylene production process |
| CN203635020U (en) * | 2013-08-20 | 2014-06-11 | 宁夏宝塔石化科技实业发展有限公司 | Separation and recycling device for tail gas produced by polypropylene |
| CN204746019U (en) * | 2015-05-25 | 2015-11-11 | 南京都乐制冷设备有限公司 | Propylene circulation recovery unit of usefulness is retrieved to tail gas in polypropylene production |
| CN104923029A (en) * | 2015-06-01 | 2015-09-23 | 中国寰球工程公司 | Method for recovering exhaust gas according to polyolefin gas phase method |
| CN105004140A (en) * | 2015-07-30 | 2015-10-28 | 大连欧科膜技术工程有限公司 | Polypropylene tail gas recovery device and recovery method |
Non-Patent Citations (1)
| Title |
|---|
| 许多琦: "聚丙烯生产过程中外排尾气的完全回收", 《合成树脂和塑料》 * |
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Application publication date: 20190301 |