CN205774375U - Utilize the system of Fischer-Tropsch process exhaust preparing liquefied natural gas - Google Patents
Utilize the system of Fischer-Tropsch process exhaust preparing liquefied natural gas Download PDFInfo
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- CN205774375U CN205774375U CN201620470092.4U CN201620470092U CN205774375U CN 205774375 U CN205774375 U CN 205774375U CN 201620470092 U CN201620470092 U CN 201620470092U CN 205774375 U CN205774375 U CN 205774375U
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- fischer
- gas
- tropsch process
- process exhaust
- pipeline
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Abstract
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, including: the first cooler, the second cooler, heavy hydrocarbon scrubbing tower, water scrubber, absorption tower, regenerator, molecular sieve drying device, sulfur loading active carbon bed and liquefaction segregation apparatus.The technical solution of the utility model can sufficiently remove the impurity such as heavy hydrocarbon, alcohol and the acid in unstripped gas, carbon dioxide, water, hydrargyrum, and feed gas composition is separated into liquefied natural gas, hydrogen rich gas, rich CO (carbon monoxide converter) gas, improve the value of unstripped gas, there is higher economic benefit.
Description
Technical field
This utility model relates to waste gas recovery and utilizes field, particularly relates to one and utilizes Fischer-Tropsch process exhaust system
The system of liquefied natural gas.
Background technology
F-T synthesis technology is the key technology in indirect coal liquefaction technique, its dominant response be CO and
H2Reaction generates Hydrocarbon, has gaseous products, liquid product and solid product in the product of generation.
The purpose of F-T synthesis be coal is converted into gasoline, diesel oil, kerosene, fuel oil, liquefied petroleum gas and its
His product, it mainly includes that coal gasification, synthesis gas conversion/purify, F-T synthesis and Fischer-Tropsch synthetic carry
The technical processs such as matter.
Fischer-Tropsch synthesis can produce some gaseous state tail gas products, main component include methane, hydrogen, one
Carbonoxide, nitrogen, and some hydrocarbon productss, also include a small amount of alcohols and acids product, gaseous product
In a lot of compositions can be recycled purification, greenhouse effect can be increased as directly discharged by Fischer-Tropsch process exhaust
Should, pollute environment, bring significant wastage.
Utility model content
The technical problems to be solved in the utility model is to provide and a kind of can make full use of Fischer-Tropsch process exhaust
Utilize the system of Fischer-Tropsch process exhaust preparing liquefied natural gas.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, including:
For making Fischer-Tropsch process exhaust tentatively lower the temperature, and isolate the first cooler of aqueous water and heavy hydrocarbon, with
Fischer-Tropsch process exhaust source of the gas is connected by pipeline；
For making the Fischer-Tropsch process exhaust tentatively lowered the temperature again lower the temperature, and it is further separated out aqueous water and heavy hydrocarbon
The second cooler, be connected by pipeline with the first cooler；
For the Fischer-Tropsch process exhaust after cooling again is carried out heavy hydrocarbon washing, Fischer-Tropsch process exhaust is made to remove
The heavy hydrocarbon scrubbing tower of C5 and C5+, is connected by pipeline with the second cooler；
Fischer-Tropsch process exhaust after washing heavy hydrocarbon is washed, and makes Fischer-Tropsch process exhaust remove organic acid
With the water scrubber of alcohol, it is connected by pipeline with heavy hydrocarbon scrubbing tower；
For the Fischer-Tropsch process exhaust after washing is carried out carbonization treatment, Fischer-Tropsch process exhaust is made to remove titanium dioxide
The absorption tower of carbon and regenerator, absorption tower is connected by pipeline with water scrubber, and regenerator and absorption tower are by pipe
Road connects；
For molecular sieve drying device withering to the Fischer-Tropsch process exhaust after carbonization treatment, with suction
Receive tower to be connected by pipeline；
For the sulfur loading active carbon bed that the Fischer-Tropsch process exhaust demercuration after dried is processed, do with molecular sieve
Dry device is connected by pipeline；
Fischer-Tropsch process exhaust after processing demercuration carries out liquefaction and separates, and makes Fischer-Tropsch process exhaust isolate
Mixed hydrocarbon, hydrogen rich gas, rich CO (carbon monoxide converter) gas, the liquefaction segregation apparatus of liquefied natural gas, described liquefaction separates
Device is connected by pipeline with sulfur loading active carbon bed.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, liquefaction separates dress
The mixed hydrocarbon outlet put is connected by reflux pipe with the detergent entrance of heavy hydrocarbon scrubbing tower.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, described liquefaction divides
Include from device:
Fischer-Tropsch process exhaust after processing demercuration carries out the first-class heat exchanger of preliminary cooling process, with
Sulfur loading active carbon bed is connected by pipeline；
Fischer-Tropsch process exhaust after making preliminary cooling process isolates the liquefied petroleum gas rectifying column of mixed hydrocarbon,
It is connected by pipeline with first-class heat exchanger, the mixed hydrocarbon outlet of liquefied petroleum gas rectifying column and washing of heavy hydrocarbon scrubbing tower
Wash agent entrance to be connected by reflux pipe；
For the Fischer-Tropsch process exhaust after isolating mixed hydrocarbon being carried out again the secondary heat exchanger of cooling process, with
Liquefied petroleum gas rectifying column is connected by pipeline；
Fischer-Tropsch process exhaust after making cooling again process isolates the dehydrogenation tower of hydrogen rich gas, changes with two grades
Hot device is connected by pipeline；
For make the Fischer-Tropsch process exhaust after isolating hydrogen rich gas isolate rich CO (carbon monoxide converter) gas, liquefy natural
The methane tower of gas, is connected by pipeline with dehydrogenation tower.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, described liquefaction divides
Nitrogen refrigeration system and the azeotrope refrigeration system for providing the cold separated that liquefies also is included from device.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, the top of dehydrogenation tower
Portion hydrogen rich gas outlet connect with hydrogen rich gas discharge pipe, hydrogen rich gas discharge pipe sequentially pass through secondary heat exchanger, one
Level heat exchanger, so that the hydrogen rich gas in hydrogen rich gas discharge pipe is cooled down by secondary heat exchanger and first-class heat exchanger
Cooling, the rich CO (carbon monoxide converter) gas outlet at the top of methane tower connects with rich CO (carbon monoxide converter) gas discharge pipe, rich
CO (carbon monoxide converter) gas discharge pipe sequentially passes through secondary heat exchanger, first-class heat exchanger, so that rich CO (carbon monoxide converter) gas
Rich CO (carbon monoxide converter) gas in discharge pipe is cooled by secondary heat exchanger and first-class heat exchanger.
The technical solution of the utility model can sufficiently remove heavy hydrocarbon, alcohol and the acid in unstripped gas, titanium dioxide
The impurity such as carbon, water, hydrargyrum, by liquefaction segregation apparatus, are separated into liquefied natural gas, richness by feed gas composition
Hydrogen, rich CO (carbon monoxide converter) gas.The technical solution of the utility model ensure that liquefaction segregation apparatus safety is steady
Fixed operation, tail gas separation becomes liquefied natural gas, hydrogen rich gas, rich CO (carbon monoxide converter) gas simultaneously, improves former
The value of material gas, has higher economic benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model
Figure；
Fig. 2 is the structural representation of liquefaction segregation apparatus.
Detailed description of the invention
As shown in Figure 1 and Figure 2, the system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model,
Including:
For making Fischer-Tropsch process exhaust tentatively lower the temperature, and isolate the first cooler 1 of aqueous water and heavy hydrocarbon,
It is connected by pipeline with Fischer-Tropsch process exhaust source of the gas；
For making the Fischer-Tropsch process exhaust tentatively lowered the temperature again lower the temperature, and it is further separated out aqueous water and heavy hydrocarbon
The second cooler 2, be connected by pipeline with the first cooler 1；
For the Fischer-Tropsch process exhaust after cooling again is carried out heavy hydrocarbon washing, Fischer-Tropsch process exhaust is made to remove
The heavy hydrocarbon scrubbing tower 3 of C5 and C5+, is connected by pipeline with the second cooler；
Fischer-Tropsch process exhaust after washing heavy hydrocarbon is washed, and makes Fischer-Tropsch process exhaust remove organic acid
With the water scrubber 4 of alcohol, it is connected by pipeline with heavy hydrocarbon scrubbing tower；
For the Fischer-Tropsch process exhaust after washing is carried out carbonization treatment, Fischer-Tropsch process exhaust is made to remove titanium dioxide
The absorption tower 5 of carbon and regenerator, absorption tower 5 is connected by pipeline with water scrubber 4, regenerator and absorption tower
5 are connected by pipeline；
For molecular sieve drying device 6 withering to the Fischer-Tropsch process exhaust after carbonization treatment, with
Absorption tower is connected by pipeline；
For the sulfur loading active carbon bed 7 that the Fischer-Tropsch process exhaust demercuration after dried is processed, with molecular sieve
Drying device 6 is connected by pipeline；
Fischer-Tropsch process exhaust after processing demercuration carries out liquefaction and separates, and makes Fischer-Tropsch process exhaust isolate
Mixed hydrocarbon, hydrogen rich gas, rich CO (carbon monoxide converter) gas, the liquefaction segregation apparatus 8 of liquefied natural gas, liquefaction separates dress
Put 8 to be connected by pipeline with sulfur loading active carbon bed 7.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, liquefaction separates dress
The mixed hydrocarbon outlet put is connected by reflux pipe with the detergent entrance of heavy hydrocarbon scrubbing tower.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, liquefaction separates dress
Put and include:
Fischer-Tropsch process exhaust after processing demercuration carries out the first-class heat exchanger of preliminary cooling process, with
Sulfur loading active carbon bed is connected by pipeline；
Fischer-Tropsch process exhaust after making preliminary cooling process isolates the liquefied petroleum gas rectifying column of mixed hydrocarbon,
It is connected by pipeline with first-class heat exchanger, the mixed hydrocarbon outlet of liquefied petroleum gas rectifying column and washing of heavy hydrocarbon scrubbing tower
Wash agent entrance to be connected by reflux pipe；
For the Fischer-Tropsch process exhaust after isolating mixed hydrocarbon being carried out again the secondary heat exchanger of cooling process, with
Liquefied petroleum gas rectifying column is connected by pipeline；
Fischer-Tropsch process exhaust after making cooling again process isolates the dehydrogenation tower of hydrogen rich gas, changes with two grades
Hot device is connected by pipeline；
For make the Fischer-Tropsch process exhaust after isolating hydrogen rich gas isolate rich CO (carbon monoxide converter) gas, liquefy natural
The methane tower of gas, is connected by pipeline with dehydrogenation tower.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, liquefaction separates dress
Put nitrogen refrigeration system and the azeotrope refrigeration system also including the cold for providing liquefaction to separate.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, the top of dehydrogenation tower
Portion hydrogen rich gas outlet connect with hydrogen rich gas discharge pipe, hydrogen rich gas discharge pipe sequentially pass through secondary heat exchanger, one
Level heat exchanger, so that the hydrogen rich gas in hydrogen rich gas discharge pipe is cooled down by secondary heat exchanger and first-class heat exchanger
Cooling, the rich CO (carbon monoxide converter) gas outlet at the top of methane tower connects with rich CO (carbon monoxide converter) gas discharge pipe, rich
CO (carbon monoxide converter) gas discharge pipe sequentially passes through secondary heat exchanger, first-class heat exchanger, so that rich CO (carbon monoxide converter) gas
Rich CO (carbon monoxide converter) gas in discharge pipe is cooled by secondary heat exchanger and first-class heat exchanger.
The technical solution of the utility model can make Fischer-Tropsch process exhaust be separated into liquefied natural gas, hydrogen rich gas, richness
CO (carbon monoxide converter) gas, improves the value of unstripped gas, has higher economic benefit.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, the first cooler
Can be water cooler or air cooler.
The system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, the second cooler
For freon refrigerator or lithium bromide precooling machine or the refrigeration machine of his type.
Unstripped gas enters from the bottom of the tower of heavy hydrocarbon scrubbing tower, goes out from tower top, and detergent sprays in tower from tower top, from
Go out at the bottom of tower, C5 and C5+ during unstripped gas (Fischer-Tropsch process exhaust) is fallen in removing after heavy hydrocarbon washs,
Make the content of C5 and C5+ less than 1ppm.
Detergent is from the mixed hydrocarbon in liquefaction separation circuit, and the system driving initial stage uses pentane, amylene, fourth
The mixture of one or several compositions in alkane, butylene, propane, propylene is as detergent.
Washing step uses water scrubber, and unstripped gas, from entering water scrubber at the bottom of tower, goes out from tower top, and desalted water is from tower
Top spray enters in tower, goes out from the bottom of tower, after washing removing fall in unstripped gas organic acid and alcohol, make acid and
The content of alcohol is less than 0.5ppm.
Unstripped gas enters decarbonization process, the carbon dioxide in removing unstripped gas after washing step, makes dioxy
Changing carbon content and use MDEA decarburization less than 50ppm, decarbonization process, MDEA decarburization uses an absorption
Tower and a regenerator.
Unstripped gas enters drying process after decarbonization process, and drying process uses molecular sieve drying flow process, makes
Water dew point is less than-65 DEG C.
Unstripped gas enters demercuration operation after drying process, and demercuration uses sulfur loading active carbon, makes mercury content little
In 10ng/m3。
Unstripped gas enters liquefaction separation circuit after demercuration operation, and liquefaction separation circuit is mainly by liquefied petroleum
Gas rectifying column, dehydrogenation tower, methane tower and heat exchanger, separator composition, at liquefied petroleum gas rectifying column
Isolating mixed hydrocarbon at the bottom of tower, the unstripped gas of tower top enters dehydrogenation tower after cooling, isolates hydrogen rich gas from tower top,
Tower bottom liquid body product enters methane tower, and the tower top at methane tower isolates rich CO (carbon monoxide converter) gas, separates at the bottom of tower
Go out liquefied natural gas.
Utilize the embodiment of the system job utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model
As follows:
Temperature 60 C, pressure 31bar, flow are 23000Nm3The Fischer-Tropsch process exhaust of/h, through water-cooled
Technical cooling is to 40 DEG C, and cutting out partial water and heavy hydrocarbon, subsequently into pre-cooling working procedure, further by tail
The temperature of gas reduces, and is again separate out part water and heavy hydrocarbon, enters heavy hydrocarbon washing procedure, heavy hydrocarbon washers
In sequence, tail gas is through after the mixed hydrocarbon washing of liquefaction separation circuit, by the content of C5 and C5+ component
Being down to below 1ppm, the device driving initial stage uses isopentane washing, the Fischer-Tropsch process exhaust after de-heavy hydrocarbon to enter
Enter washing process, removing acid and alcohol, the content of acid and alcohol is down to below 0.5ppm, subsequently into decarburization
Technique, is down to below 50ppm by the carbon dioxide content in tail gas, subsequently into drying process, will take
Water dew point in torr synthesis tail gas is reduced to-65 DEG C, and through demercuration operation, mercury content is down to 10ng/Nm3,
Finally entering liquefying separation process, liquefying separation process is carried by nitrogen refrigeration system and azeotrope refrigeration system
The cold separated for liquefaction, the tail gas after purification enters liquefied petroleum gas after first-class heat exchanger cools
Rectifying column, is isolating mixed hydrocarbon, is isolating the tail gas of light component at tower top at the bottom of the tower of liquefied petroleum gas rectifying column,
Tail gas enters dehydrogenation tower after secondary heat exchanger is lowered the temperature further, and the tower top at dehydrogenation tower isolates hydrogen rich gas,
Enter methane tower at isolated liquid-phase product at the bottom of tower, at the bottom of the tower of methane tower, isolate liquefied natural gas,
Tower top isolates rich CO (carbon monoxide converter) gas, is finally completed purification and the liquefaction separation process of Fischer-Tropsch process exhaust.
Below it is only preferred implementation of the present utility model, it is noted that common for the art
For technical staff, on the premise of without departing from this utility model principle, it is also possible to make some improvement and profit
Decorations, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (5)
1. the system utilizing Fischer-Tropsch process exhaust preparing liquefied natural gas, it is characterised in that including:
For making Fischer-Tropsch process exhaust tentatively lower the temperature, and isolate the first cooler of aqueous water and heavy hydrocarbon, with
Fischer-Tropsch process exhaust source of the gas is connected by pipeline；
For making the Fischer-Tropsch process exhaust tentatively lowered the temperature again lower the temperature, and it is further separated out aqueous water and heavy hydrocarbon
The second cooler, be connected by pipeline with the first cooler；
For the Fischer-Tropsch process exhaust after cooling again is carried out heavy hydrocarbon washing, Fischer-Tropsch process exhaust is made to remove
The heavy hydrocarbon scrubbing tower of C5 and C5+, is connected by pipeline with the second cooler；
Fischer-Tropsch process exhaust after washing heavy hydrocarbon is washed, and makes Fischer-Tropsch process exhaust remove organic acid
With the water scrubber of alcohol, it is connected by pipeline with heavy hydrocarbon scrubbing tower；
For the Fischer-Tropsch process exhaust after washing is carried out carbonization treatment, Fischer-Tropsch process exhaust is made to remove titanium dioxide
The absorption tower of carbon and regenerator, absorption tower is connected by pipeline with water scrubber, and regenerator and absorption tower are by pipe
Road connects；
For molecular sieve drying device withering to the Fischer-Tropsch process exhaust after carbonization treatment, with suction
Receive tower to be connected by pipeline；
For the sulfur loading active carbon bed that the Fischer-Tropsch process exhaust demercuration after dried is processed, do with molecular sieve
Dry device is connected by pipeline；
Fischer-Tropsch process exhaust after processing demercuration carries out liquefaction and separates, and makes Fischer-Tropsch process exhaust isolate
Mixed hydrocarbon, hydrogen rich gas, rich CO (carbon monoxide converter) gas, the liquefaction segregation apparatus of liquefied natural gas, described liquefaction separates
Device is connected by pipeline with sulfur loading active carbon bed.
Utilize the system of Fischer-Tropsch process exhaust preparing liquefied natural gas the most as claimed in claim 1, its feature
Being, the mixed hydrocarbon outlet of liquefaction segregation apparatus is with the detergent entrance of heavy hydrocarbon scrubbing tower by reflux pipe even
Connect.
Utilize the system of Fischer-Tropsch process exhaust preparing liquefied natural gas the most as claimed in claim 2, its feature
Being, described liquefaction segregation apparatus includes:
Fischer-Tropsch process exhaust after processing demercuration carries out the first-class heat exchanger of preliminary cooling process, with
Sulfur loading active carbon bed is connected by pipeline；
Fischer-Tropsch process exhaust after making preliminary cooling process isolates the liquefied petroleum gas rectifying column of mixed hydrocarbon,
It is connected by pipeline with first-class heat exchanger, the mixed hydrocarbon outlet of liquefied petroleum gas rectifying column and washing of heavy hydrocarbon scrubbing tower
Wash agent entrance to be connected by reflux pipe；
For the Fischer-Tropsch process exhaust after isolating mixed hydrocarbon being carried out again the secondary heat exchanger of cooling process, with
Liquefied petroleum gas rectifying column is connected by pipeline；
Fischer-Tropsch process exhaust after making cooling again process isolates the dehydrogenation tower of hydrogen rich gas, changes with two grades
Hot device is connected by pipeline；
For make the Fischer-Tropsch process exhaust after isolating hydrogen rich gas isolate rich CO (carbon monoxide converter) gas, liquefy natural
The methane tower of gas, is connected by pipeline with dehydrogenation tower.
Utilize the system of Fischer-Tropsch process exhaust preparing liquefied natural gas the most as claimed in claim 3, its feature
Being, described liquefaction segregation apparatus also includes the nitrogen refrigeration system of the cold for providing liquefaction to separate and mixes
Close cryogen refrigeration system.
Utilize the system of Fischer-Tropsch process exhaust preparing liquefied natural gas the most as claimed in claim 4, its feature
Being, the hydrogen rich gas outlet at the top of dehydrogenation tower connects with hydrogen rich gas discharge pipe, hydrogen rich gas discharge pipe warp successively
Cross secondary heat exchanger, first-class heat exchanger so that the hydrogen rich gas in hydrogen rich gas discharge pipe by secondary heat exchanger with
And first-class heat exchanger cools, the rich CO (carbon monoxide converter) gas outlet at the top of methane tower and rich carbon monoxide gas
Body discharge pipe connects, and rich CO (carbon monoxide converter) gas discharge pipe sequentially passes through secondary heat exchanger, first-class heat exchanger, with
Make the rich CO (carbon monoxide converter) gas in rich CO (carbon monoxide converter) gas discharge pipe by secondary heat exchanger and one-level heat exchange
Device cools.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620470092.4U CN205774375U (en) | 2016-05-20 | 2016-05-20 | Utilize the system of Fischer-Tropsch process exhaust preparing liquefied natural gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620470092.4U CN205774375U (en) | 2016-05-20 | 2016-05-20 | Utilize the system of Fischer-Tropsch process exhaust preparing liquefied natural gas |
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| CN205774375U true CN205774375U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620470092.4U Withdrawn - After Issue CN205774375U (en) | 2016-05-20 | 2016-05-20 | Utilize the system of Fischer-Tropsch process exhaust preparing liquefied natural gas |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105838465A (en) * | 2016-05-20 | 2016-08-10 | 北京中科瑞奥能源科技股份有限公司 | Process and system for preparing liquefied natural gas by utilizing Fischer-Tropsch synthesis tail gas |
-
2016
- 2016-05-20 CN CN201620470092.4U patent/CN205774375U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105838465A (en) * | 2016-05-20 | 2016-08-10 | 北京中科瑞奥能源科技股份有限公司 | Process and system for preparing liquefied natural gas by utilizing Fischer-Tropsch synthesis tail gas |
| CN105838465B (en) * | 2016-05-20 | 2018-07-06 | 中科瑞奥能源科技股份有限公司 | Utilize the technique and system of Fischer-Tropsch process exhaust preparing liquefied natural gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161207 Effective date of abandoning: 20180706 |