CN105001931A - Preparation technology of liquefied petroleum gas from synthetic gas - Google Patents
Preparation technology of liquefied petroleum gas from synthetic gas Download PDFInfo
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- CN105001931A CN105001931A CN201510370574.2A CN201510370574A CN105001931A CN 105001931 A CN105001931 A CN 105001931A CN 201510370574 A CN201510370574 A CN 201510370574A CN 105001931 A CN105001931 A CN 105001931A
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Abstract
The invention discloses a preparation technology of liquefied petroleum gas from synthetic gas. The preparation technology comprises carrying out partial condensation on a high temperature gas mixture flowing out of a reactor by a heat exchanger, feeding the condensed mixture into a flash tank, carrying out gas-liquid flash separation to remove liquid water, carrying out copious cooling on the gas phase by a copious cooling device, feeding the gas phase into the flash tank, carrying out gas-liquid separation to separate the most H2 and Co and a part of C1 and C2, recycling the separated materials, carrying out pressure reduction on the liquid phase by a decompressor, carrying out heating to a certain vaporization ratio by a heat exchanger, carrying out rectification separation by a rectification tower, recycling the tower top fraction, carrying out pressure reduction treatment on the bottom liquid in the rectification tower by the decompressor, feeding the bottom liquid into a rectification tower, recycling the tower top fraction, feeding the bottom liquid into a rectification tower, carrying out separation and collection of a desired product LPG from the tower top. The preparation technology has the advantages of simple processes, large mixed gas treatment amount and good separation effects.
Description
Technical field
The invention belongs to liquefied petroleum gas (LPG) technical field, especially synthetic gas prepares the preparation technology of liquefied petroleum gas (LPG).
Background technology
Liquefied petroleum gas (LPG) (LPG) is the general name of propane and butane, or the single or mixture of the two, is widely used in production and life, as motor vehicle clean fuel, and industry, agricultural and family's heat-obtaining fuel, the raw material of aerosol and Chemical Manufacture.LPG can under the effect of catalyzer, with methyl alcohol or DME for intermediate product, is synthesized by half indirect method by synthetic gas.Be the process of liquid product by Synthetic holography, be called as GTL(Gas-to-Liquids) technology, wherein LPG is one of important liquid product.Set out with Sweet natural gas or coal and produce LPG, supplementing as petroleum resources, effective use of energy sources, has very important strategic importance to China.Due to the transformation efficiency of raw material and the impact of catalyst selectivity, in product, be mixed with unreacted unstripped gas hydrogen, carbon monoxide, carbonic acid gas and multiple byproduct methane, ethane, pentane, water etc.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose the preparation technology that a kind of synthetic gas prepares liquefied petroleum gas (LPG), technique is simple, and mixture gas treatment amount is large, good separating effect.
In order to realize foregoing invention object, the invention provides following technical scheme:
Synthetic gas prepares a preparation technology for liquefied petroleum gas (LPG), comprises the steps, the high temperature gas mixture of outflow reactor is first through heat exchanger section condensation, and then after condensation, mixture enters flash tank and carries out gas-liquid flash separation, removing liquid water;
Gas phase portion, after cryogenic unit deep cooling, enters flash tank and carries out gas-liquid separation again, separates most H
2, CO and part C
1, C
2, and participate in circulation;
Liquid phase stream after reliever decompression, then reaches certain vaporization ratio through interchanger heating, and then enter rectifying tower rectifying separation, overhead fraction participates in circulation; The still liquid of rectifying tower, after reliever reduced pressure treatment, enters rectifying tower, and overhead fraction participates in circulation; The still liquid of rectifying tower enters rectifying tower, can obtain object product LPG through being separated tower top.
Further, shell heat exchanger selected by interchanger.
Further, the gaseous mixture original state that band is separated is 400 degree, 4.8MPa.
Further, flash conditions is set to 40 degree, 4.8MPa.
Compared with prior art, the present invention has the following advantages:
Present method technique is simple, and mixture gas treatment amount is large, and good separating effect, product purity can reach 95.6%, can reach desirable separating effect.
Embodiment
Describe the present invention below, the description of this part is only exemplary and explanatory, should not have any restriction to protection scope of the present invention.
Synthetic gas prepares a preparation technology for liquefied petroleum gas (LPG), comprises the steps, the high temperature gas mixture of outflow reactor is first through heat exchanger section condensation, and wherein, shell heat exchanger selected by interchanger.Then after condensation, mixture enters flash tank and carries out gas-liquid flash separation, removing liquid water; The gaseous mixture original state that band is separated is 400 degree, 4.8MPa.Flash conditions is set to 40 degree, 4.8MPa.
Gas phase portion, after cryogenic unit deep cooling, enters flash tank and carries out gas-liquid separation again, separates most H
2, CO and part C
1, C
2, and participate in circulation;
Liquid phase stream after reliever decompression, then reaches certain vaporization ratio through interchanger heating, and then enter rectifying tower rectifying separation, overhead fraction participates in circulation; The still liquid of rectifying tower, after reliever reduced pressure treatment, enters rectifying tower, and overhead fraction participates in circulation; The still liquid of rectifying tower enters rectifying tower, can obtain object product LPG through being separated tower top.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a synthetic gas prepares the preparation technology of liquefied petroleum gas (LPG), comprise the steps, it is characterized in that: the high temperature gas mixture of outflow reactor is first through heat exchanger section condensation, and then after condensation, mixture enters flash tank and carries out gas-liquid flash separation, removing liquid water;
Gas phase portion, after cryogenic unit deep cooling, enters flash tank and carries out gas-liquid separation again, separates most H
2, CO and part C
1, C
2, and participate in circulation;
Liquid phase stream after reliever decompression, then reaches certain vaporization ratio through interchanger heating, and then enter rectifying tower rectifying separation, overhead fraction participates in circulation; The still liquid of rectifying tower, after reliever reduced pressure treatment, enters rectifying tower, and overhead fraction participates in circulation; The still liquid of rectifying tower enters rectifying tower, can obtain object product LPG through being separated tower top.
2. synthetic gas prepares the preparation technology of liquefied petroleum gas (LPG) as claimed in claim 1, it is characterized in that: shell heat exchanger selected by interchanger.
3. synthetic gas prepares the preparation technology of liquefied petroleum gas (LPG) as claimed in claim 1, it is characterized in that: the gaseous mixture original state that band is separated is 400 degree, 4.8MPa.
4. synthetic gas prepares the preparation technology of liquefied petroleum gas (LPG) as claimed in claim 1, it is characterized in that: flash conditions is set to 40 degree, 4.8MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370574.2A CN105001931A (en) | 2015-06-30 | 2015-06-30 | Preparation technology of liquefied petroleum gas from synthetic gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370574.2A CN105001931A (en) | 2015-06-30 | 2015-06-30 | Preparation technology of liquefied petroleum gas from synthetic gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105001931A true CN105001931A (en) | 2015-10-28 |
Family
ID=54374801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510370574.2A Pending CN105001931A (en) | 2015-06-30 | 2015-06-30 | Preparation technology of liquefied petroleum gas from synthetic gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105001931A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1733873A (en) * | 2004-08-11 | 2006-02-15 | 日本气体合成株式会社 | Method for producing liquefied petroleum gas |
| US20060074132A1 (en) * | 2002-08-13 | 2006-04-06 | National Institute For Strategic Technology And Commercialization (Nistac) | Process and apparatus for the production of hydrocarbon compounds from methane |
-
2015
- 2015-06-30 CN CN201510370574.2A patent/CN105001931A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060074132A1 (en) * | 2002-08-13 | 2006-04-06 | National Institute For Strategic Technology And Commercialization (Nistac) | Process and apparatus for the production of hydrocarbon compounds from methane |
| CN1733873A (en) * | 2004-08-11 | 2006-02-15 | 日本气体合成株式会社 | Method for producing liquefied petroleum gas |
Non-Patent Citations (1)
| Title |
|---|
| 王焕梅: "《石油化工工艺基础》", 31 August 2007, 中国石化出版社 * |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20180831 |