CN111336715A - Energy-saving refrigeration system suitable for olefin separation process - Google Patents
Energy-saving refrigeration system suitable for olefin separation process Download PDFInfo
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- CN111336715A CN111336715A CN202010185386.3A CN202010185386A CN111336715A CN 111336715 A CN111336715 A CN 111336715A CN 202010185386 A CN202010185386 A CN 202010185386A CN 111336715 A CN111336715 A CN 111336715A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 119
- 150000001336 alkenes Chemical class 0.000 title claims abstract description 22
- 238000000926 separation method Methods 0.000 title claims abstract description 22
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 50
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 50
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical group [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 15
- 239000006096 absorbing agent Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 abstract description 10
- 239000012530 fluid Substances 0.000 abstract description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000003245 coal Substances 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B35/00—Boiler-absorbers, i.e. boilers usable for absorption or adsorption
- F25B35/02—Boiler-absorbers, i.e. boilers usable for absorption or adsorption using a liquid as sorbent, e.g. brine
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
-
- 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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses an energy-saving refrigeration system suitable for an olefin separation process, which comprises a propylene refrigeration system X01, an X02 and three groups of refrigeration users, wherein the three groups of refrigeration users are a 7-DEG C refrigeration user group, a-24-DEG C refrigeration user group and a-40-DEG C refrigeration user group respectively, the-40-DEG C refrigeration user and the-24-DEG C refrigeration user are connected with the propylene refrigeration system X01, and the 7-DEG C refrigeration user is connected with the X02; the invention optimizes and adds a set of energy-saving refrigerating system for producing 7 ℃ chilled water to replace 7 ℃ propylene refrigerating fluid produced by a propylene refrigerating unit in the prior art, thereby reducing the original propylene refrigerating system, reducing the investment of fixed assets of enterprise equipment, reducing the consumption of 9.5MpaA and 530 ℃ high-pressure steam and reducing the operation cost of enterprises. Meanwhile, the 7 ℃ propylene refrigerating fluid is replaced by the 7 ℃ chilled water, so that the circulating amount of propylene in the system is reduced, the chilled water is safer than the propylene liquid, and the safety risk in the operation of an enterprise is reduced.
Description
Technical Field
The invention relates to the field of methanol-to-olefin in the coal chemical industry, in particular to an energy-saving refrigeration system suitable for an olefin separation process.
Background
China is a country rich in coal, poor in oil and less in gas, and how to produce more products with high added values by using coal becomes a popular direction for research of a plurality of researchers. The novel coal chemical industry route for producing the methanol by the coal and then producing the polyolefin by the methanol is widely applied in China in recent years, a methanol-to-polyolefin device generally comprises four units of reaction regeneration, olefin separation, olefin polymerization and product packaging, the main technical route of the olefin separation process comprises a LUMMUS process, a KBR process and a regeneration process, a set of key propylene refrigeration system is involved in the three technical routes, the propylene refrigeration system mainly has the function of providing refrigeration cold sources with the temperature of 7 ℃, 24 ℃ and 40 ℃ for the olefin separation unit, the refrigeration refrigerant is liquid propylene, and the working principle is as follows: after being compressed to about 1.6MPaG by a centrifugal turbine compressor, the gaseous propylene is cooled and condensed into high-pressure liquid propylene at the temperature of minus 20 ℃, and then the high-pressure liquid propylene is sent to each refrigeration user for decompression flash evaporation refrigeration, and the flashed propylene gas returns to each front separator of each section of the centrifugal turbine compressor according to the pressure grade and then is subjected to compression refrigeration cycle. The propylene temperature grades of refrigeration users can be divided into three grades of 7 ℃, 24 ℃ and 40 ℃, wherein 4 users with 7 ℃ grade, 3 users with-24 ℃ grade and 4 users with-40 ℃ grade are provided. The propylene refrigeration users in such quantity enable the circulating propylene gas quantity in the propylene refrigeration system to be large, the 9.5MpaA high-pressure steam quantity at 530 ℃ is consumed greatly, the required centrifugal turbine compressor system is huge, the steam consumption is large, propylene is a flammable and explosive medium, leakage is easy to occur in the refrigeration process, and a plurality of challenges are brought to the economic and safe operation of the device.
Therefore, the propylene refrigeration system in the current olefin separation process has the following disadvantages: (1) the required centrifugal type turbo-propylene compressor system is huge, and the investment of equipment fixed assets is high; (2)9.5MpaA, high-pressure steam consumption at 530 ℃ is large, and the running cost of the device is high; (3) the refrigeration medium is propylene, and the refrigeration medium is flammable and explosive, so that the device is challenged to operate safely and stably.
Disclosure of Invention
The invention aims to provide an energy-saving refrigeration system suitable for an olefin separation process, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an energy-saving refrigeration system suitable for an olefin separation process comprises a propylene refrigeration system X01, an energy-saving refrigeration system X02 and three groups of refrigeration users, wherein the three groups of refrigeration users are a 7-DEG C refrigeration user group, a-24-DEG C refrigeration user group and a-40-DEG C refrigeration user group respectively, the-40-DEG C refrigeration user and the-24-DEG C refrigeration user are connected with the propylene refrigeration system X01, and the 7-DEG C refrigeration user is connected with the energy-saving refrigeration system X02.
The energy-saving refrigeration system X02 comprises a hot water type lithium bromide unit X021, a water collecting tank V01, a water dividing tank V02, a chilled water pump and a connecting pipeline thereof, wherein the hot water type lithium bromide unit X021 comprises a generator M01, a condenser M02, an evaporator M03 and an absorber M04; the generator M01 of the invention is internally provided with a reverse regeneration unit low-pressure steam condensate with the temperature of 150 ℃ and the flow rate of 50M3H; the 7 ℃ chilled water generated by the energy-saving refrigerating system is desalted water, the water inlet temperature is 12 ℃, the water outlet temperature is 7 ℃, and the flow is 600m3/h。
As a preferred embodiment of the present invention: the 7-DEG C refrigeration user group, the-24-DEG C refrigeration user group and the-40-DEG C refrigeration user group respectively comprise 4 users, 3 users and 4 users, namely 7-DEG C refrigeration users E01-E04, 24-DEG C refrigeration users E05-E07 and 40-DEG C refrigeration users E08-E11; meanwhile, the number of the chilled water pumps in the energy-saving refrigeration system X02 is 3, namely the chilled water pumps P01-P03.
Compared with the prior art, the invention has the beneficial effects that: (1) providing 7 ℃ chilled water for replacing 7 ℃ propylene refrigerating fluid, and reducing the propylene circulating amount; (2) by reducing the propylene circulation volume, the original propylene refrigeration system is reduced, and the fixed asset investment of enterprise equipment is reduced; (3) by reducing the original propylene refrigeration system, the consumption of high-pressure steam at 530 ℃ of 9.5MpaA is reduced, and the operation cost of enterprises is reduced; (4) the 7 ℃ propylene refrigerating fluid is replaced by the 7 ℃ chilled water, so that the circulating amount of propylene in the system is reduced, the chilled water is safer than the propylene liquid, and the safety risk in the operation of an enterprise is reduced.
Drawings
FIG. 1 is a propylene cooling system diagram of a prior olefin separation process.
Fig. 2 is a diagram of the refrigeration system of the present invention.
Fig. 3 is a diagram of an energy saving refrigeration system of the present invention.
X01-propylene refrigeration system; x02-economized refrigeration system; x021-hot water type lithium bromide unit; E01-E04-7 ℃ refrigeration user; E05-E07-refrigeration user at-24 ℃; E08-E11-40 ℃ refrigeration user; v01 — header tank; v02-water diversion box; P01-P03-chilled water pump; m01 — generator; m02 — condenser; m03 — evaporator; m04-absorber
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-3, an energy-saving refrigeration system suitable for an olefin separation process comprises a propylene refrigeration system X01, an energy-saving refrigeration system X02 and three groups of refrigeration users, wherein the three groups of refrigeration users are a 7 ℃ refrigeration user group, a-24 ℃ refrigeration user group and a-40 ℃ refrigeration user group respectively, the-40 ℃ refrigeration user and the-24 ℃ refrigeration user are connected with the propylene refrigeration system X01, and the 7 ℃ refrigeration user is connected with the energy-saving refrigeration system X02.
In the olefin separation technology in the field of preparing olefins from methanol, if separation of C1-C7 is required, a gas-liquid two-phase is required to be formed in a separation tower, the boiling point of C1-C4 is very low, and the condition of forming a liquid phase is that refrigeration is required; the device optimally adds the energy-saving refrigeration system X02 in the original technology to produce chilled water at 7 ℃ to replace propylene refrigerant liquid at 7 ℃ in the original propylene refrigeration system, so that the original propylene refrigeration system X01 is reduced, the propylene refrigeration system X01 only provides propylene refrigerant liquid at two temperature levels of-24 ℃ and-40 ℃, and the newly added energy-saving refrigeration system X02 produces chilled water at 7 ℃; (1) providing 7 ℃ chilled water for replacing 7 ℃ propylene refrigerating fluid, and reducing the propylene circulating amount; (2) by reducing the propylene circulation volume, the original propylene refrigeration system is reduced, and the fixed asset investment of enterprise equipment is reduced; (3) by reducing the original propylene refrigeration system, the consumption of high-pressure steam at 530 ℃ of 9.5MpaA is reduced, and the operation cost of enterprises is reduced; (4) the 7 ℃ propylene refrigerating fluid is replaced by the 7 ℃ chilled water, so that the circulating amount of propylene in the system is reduced, the chilled water is safer than the propylene liquid, and the safety risk in the operation of an enterprise is reduced.
Specifically, the energy-saving refrigeration system X02 includes a hot-water type lithium bromide unit X021, a water collection tank V01, a water diversion tank V02, a chilled water pump and connecting pipelines thereof, wherein the hot-water type lithium bromide unit X021 includes a generator M01, a condenser M02, an evaporator M03 and an absorber M04.
The working principle of the device is as follows: in the operation process of the hot water type lithium bromide unit X021, when a lithium bromide aqueous solution is heated by low-pressure steam condensate in the generator M01, water in the solution is continuously vaporized; as the water is continuously vaporized, the concentration of the lithium bromide water solution in the generator M01 is continuously increased and enters the absorber M04; the water vapor enters the condenser M02, is cooled by cooling water in the condenser M02 and then is condensed to form high-pressure low-temperature liquid water; when the water in the condenser M02 enters the evaporator M03 through the throttle valve, the water is rapidly expanded and vaporized, and a large amount of heat of refrigerant water (desalted water) in the evaporator M03 is absorbed in the vaporization process, so that the purposes of temperature reduction and refrigeration are achieved, the temperature of the desalted water is reduced from 12 ℃ to 7 ℃, and the desalted water is changed into chilled water at 7 ℃; in the process, low-temperature water vapor enters the absorber M04, is absorbed by the lithium bromide aqueous solution in the absorber M04, the solution concentration is gradually reduced, and then is sent back to the generator M01 by the circulating pump to complete the whole circulation, so that the cold energy is continuously prepared without endless circulation.
Further, the 7 ℃ chilled water enters a water distribution box V02, enters a 7 ℃ refrigeration user group through the control of an adjusting valve for refrigeration and temperature reduction, the temperature of the 7 ℃ chilled water is increased from 7 ℃ to 12 ℃, then enters a water collection box V01, and then is pumped into a hot water type lithium bromide unit X021 through a chilled water pump to be cooled to 7 ℃, the whole cycle is completed, and the 7 ℃ chilled water is provided after the cycle is repeated.
The generator M01 of the invention is internally provided with a reverse regeneration unit low-pressure steam condensate with the temperature of 150 ℃ and the flow rate of 50M3H; the 7 ℃ chilled water generated by the energy-saving refrigerating system is desalted water, the water inlet temperature is 12 ℃, the water outlet temperature is 7 ℃, and the flow is 600m3/h。
Example 2:
on the basis of the embodiment 1, the 7-DEG C refrigeration user group, the-24-DEG C refrigeration user group and the-40-DEG C refrigeration user group respectively comprise 4 users, 3 users and 4 users, namely 7-DEG C refrigeration users E01-E04, 24-DEG C refrigeration users E05-E07 and 40-DEG C refrigeration users E08-E11; meanwhile, the number of the chilled water pumps in the energy-saving refrigeration system X02 is 3, namely the chilled water pumps P01-P03.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. An energy-saving refrigeration system suitable for an olefin separation process comprises a propylene refrigeration system X01, an energy-saving refrigeration system X02 and three groups of refrigeration users, and is characterized in that the three groups of refrigeration users are respectively a 7-DEG C refrigeration user group, a-24-DEG C refrigeration user group and a-40-DEG C refrigeration user group, the-40-DEG C refrigeration user and the-24-DEG C refrigeration user are connected with the propylene refrigeration system X01, and the 7-DEG C refrigeration user is connected with the energy-saving refrigeration system X02.
2. The energy-saving refrigeration system suitable for the olefin separation process as claimed in claim 1, wherein the energy-saving refrigeration system X02 comprises a hot water type lithium bromide unit X021, a water collecting tank V01, a water dividing tank V02, a chilled water pump and a connecting pipeline thereof.
3. The energy-saving refrigeration system suitable for the olefin separation process as claimed in claim 2, wherein the hot water type lithium bromide unit X021 comprises a generator M01, a condenser M02, an evaporator M03 and an absorber M04.
4. The energy-saving refrigeration system suitable for the olefin separation process as claimed in claim 3, wherein the generator M01 is internally provided with a reverse reefer unit low-pressure steam condensate with the temperature of 150 ℃ and the flow rate of 50M3/h。
5. The energy-saving refrigeration system suitable for the olefin separation process as claimed in claim 2, wherein the energy-saving refrigeration system X02 is desalted water, the inlet water temperature is 12 ℃, the outlet water temperature is 7 ℃, and the flow rate is 600m3/h。
6. An energy-saving refrigeration system suitable for the olefin separation process as claimed in claim 1 or 2, wherein the 7 ℃ refrigeration user group, the-24 ℃ refrigeration user group and the-40 ℃ refrigeration user group respectively comprise 4 users, 3 users and 4 users, namely 7 ℃ refrigeration users E01-E04, 24 ℃ refrigeration users E05-E07 and 40 ℃ refrigeration users E08-E11.
7. The energy-saving refrigeration system suitable for the olefin separation process as claimed in claim 2, wherein the number of the chilled water pumps in the energy-saving refrigeration system X02 is 3, namely, the chilled water pumps P01-P03.
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| CN202010185386.3A CN111336715B (en) | 2020-03-17 | 2020-03-17 | Energy-saving refrigeration system suitable for olefin separation process |
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| CN204589029U (en) * | 2015-04-15 | 2015-08-26 | 山东齐鲁石化工程有限公司 | Separation of olefins thermal-pump unit |
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| CN208949157U (en) * | 2018-10-12 | 2019-06-07 | 贺雪军 | A kind of separation of olefins energy-saving equipment |
| CN209193845U (en) * | 2018-09-27 | 2019-08-02 | 中国石油天然气股份有限公司 | Separating device for methanol-to-olefin gas |
| CN110092701A (en) * | 2018-01-31 | 2019-08-06 | 中国寰球工程有限公司 | The lighter hydrocarbons separation system and method for MTO product mix gas |
-
2020
- 2020-03-17 CN CN202010185386.3A patent/CN111336715B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103411337A (en) * | 2013-08-02 | 2013-11-27 | 北京麦科直通石化工程设计有限公司 | System and method for improving refrigerating capacity of olefin separating device |
| CN204589029U (en) * | 2015-04-15 | 2015-08-26 | 山东齐鲁石化工程有限公司 | Separation of olefins thermal-pump unit |
| CN108017501A (en) * | 2017-11-14 | 2018-05-11 | 常州大学 | A kind of propylene rectification tower process of integrated absorption refrigeration |
| CN207973691U (en) * | 2018-01-31 | 2018-10-16 | 中国寰球工程有限公司 | The lighter hydrocarbons piece-rate system of MTO product mix gas |
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| CN209193845U (en) * | 2018-09-27 | 2019-08-02 | 中国石油天然气股份有限公司 | Separating device for methanol-to-olefin gas |
| CN208949157U (en) * | 2018-10-12 | 2019-06-07 | 贺雪军 | A kind of separation of olefins energy-saving equipment |
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