CN205893188U - Utilize ft synthesis tail gas system liquefied natural gas's device - Google Patents
Utilize ft synthesis tail gas system liquefied natural gas's device Download PDFInfo
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- CN205893188U CN205893188U CN201620856519.4U CN201620856519U CN205893188U CN 205893188 U CN205893188 U CN 205893188U CN 201620856519 U CN201620856519 U CN 201620856519U CN 205893188 U CN205893188 U CN 205893188U
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Abstract
The utility model discloses an utilize ft synthesis tail gas system liquefied natural gas's device, including first rectifying column, pass through the pipe connection with ft synthesis tail gas air supply, with muddy hydrocarbon discharge pipe intercommunication at the bottom of the tower of first rectifying column, the dehydrogenation tower passes through the pipe connection with the gas exports of first rectifying column, and the hydrogen rich gas export of dehydrogenation tower is connected with the hydrogen rich gas discharge pipe, the methane tower passes through the pipe connection with liquid outlet at the bottom of the dehydrogenation tata, and the gas outlet of methane tower passes through the pipeline to be connected with rich carbon monoxide discharge pipe, and the liquefied natural gas export of methane tower is connected with the liquefied natural gas discharge pipe. The technical scheme of the utility model can separate into liquefied natural gas, hydrogen rich gas, rich carbon monoxide gas with the feed gas component. The technical scheme of the utility model can make full use of ft synthesis tail gas. The technical scheme of the utility model can improve the value of feed gas, have higher economic benefits.
Description
Technical field
This utility model is related to waste gas recovery and utilizes field, and more particularly to one kind is using Fischer-Tropsch process exhaust system liquefaction sky
So device of gas.
Background technology
F- T synthesis technology is the key technology in indirect coal liquefaction technique, and its dominant response is co and h2Reaction generates
Hydrocarbon, has gaseous products, liquid product and solid product in the product of generation.The purpose of F- T synthesis is to turn coal
Change gasoline, diesel oil, kerosene, fuel oil, liquefied petroleum gas and other products into, its main process includes coal gasification, synthesis gas becomes
Change/purify, the technical process such as F- T synthesis and Fischer-Tropsch synthetic upgrading.
Some gaseous state tail gas products can be produced in Fischer-Tropsch synthesis, main component include methane, hydrogen, carbon monoxide,
Nitrogen, and some hydrocarbon productss, also include a small amount of alcohols and acids product, and in gaseous product, a lot of compositions are to carry out
Reclaim purification, such as directly discharging Fischer-Tropsch process exhaust to increase greenhouse effect, pollute environment, bring significant wastage.
Utility model content
The technical problems to be solved in the utility model be provide a kind of can make full use of Fischer-Tropsch process exhaust utilization
The device of Fischer-Tropsch process exhaust preparing liquefied natural gas.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, comprising:
For making Fischer-Tropsch process exhaust cool down and isolating the first rectifying column of gas-liquid two-phase, with Fischer-Tropsch process exhaust source of the gas
Connected by pipeline, the bottom of towe of first rectifying column is connected with mixed hydrocarbon discharge pipe；
For making the gas phase that first rectifying column is isolated be further separated out the dehydrogenation tower of hydrogen rich gas, with first rectifying column
Gaseous phase outlet is connected by pipeline, and the hydrogen rich gas outlet of dehydrogenation tower is connected with hydrogen rich gas discharge pipe；
For making the liquid that dehydrogenation tower is discharged isolate the methane tower of liquefied natural gas, the liquid outlet with dehydrogenation tower bottom of towe
Connected by pipeline, methane tower is passed through pipeline and is connected with rich carbon monoxide discharge pipe, and the liquefied natural gas of methane tower exports and liquid
Change natural gas discharge pipe to connect.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, also includes azeotrope and follows
Ring refrigeration system, described azeotrope cycle refrigeration system includes for azeotrope pressure successively along azeotrope flow direction
The azeotrope compressor of contracting and gas-liquid separator, pipeline connection is passed through in the liquid-phase mixing cryogen outlet of described gas-liquid separator
First throttle valve, described first throttle valve connects the entrance of azeotrope compressor, described gas-liquid separator by reflux pipe
Gas phase azeotrope outlet pass through the first pipeline, the second pipeline connection second throttle, second throttle pass through pipeline with return
Stream pipeline connection so that by described first throttle valve, second throttle throttle respectively the liquid-phase mixing cryogen after cooling, gas phase mixes
Close after cryogen converges and be back to azeotrope compressor, described azeotrope is between azeotrope compressor and gas-liquid separator
Circulation, the first pipeline is sequentially passed through heat exchanger, is connected with the second pipeline after the tower bottom reboiler of methane tower, and the second pipeline process is changed
Hot device, the azeotrope in the first pipeline cools down in heat exchanger, the tower bottom reboiler of methane tower, and the mixing in the second pipeline is cold
Agent provides cold in heat exchanger.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, also includes nitrogen refrigeration system
System, described nitrogen refrigeration system includes nitrogen compressor and the 3rd choke valve, and the 3rd pipeline is passed through in the outlet of nitrogen compressor
With the inlet communication of the 3rd choke valve, the outlet of the 3rd choke valve inlet communication by the 4th pipeline and nitrogen compressor, with
, to nitrogen compressor, the 3rd pipeline the 4th pipeline is respectively through changing for nitrogen reflux after making by described 3rd choke valve throttling cooling
Hot device, the nitrogen in the 3rd pipeline cools down in heat exchanger, and the nitrogen in the 4th pipeline provides cold in heat exchanger.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, mixed hydrocarbon discharge pipe, a rich oxygen
Change carbon discharge pipe, LNG discharge pipe, hydrogen rich gas discharge pipe respectively through heat exchanger.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, dehydrogenation tower and the first rectification
Pipeline between the gaseous phase outlet of tower is divided by the 5th pipeline and methane tower top through heat exchanger, the gaseous phase outlet of methane column overhead
From device connection, the gas outlet of methane overhead separator is passed through pipeline and is connected with rich carbon monoxide discharge pipe, and the 5th pipeline passes through
Heat exchanger.
Feed gas composition can be separated into liquefied natural gas, hydrogen rich gas, a rich oxidation by the technical solution of the utility model
Carbon gas.The technical solution of the utility model can make full use of Fischer-Tropsch process exhaust.The technical solution of the utility model can
Improve the value of unstripped gas, there is higher economic benefit.
Brief description
Fig. 1 is the structural representation of the device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model.
Specific embodiment
As shown in figure 1, the device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, comprising:
For making Fischer-Tropsch process exhaust cool down and isolating the first rectifying column 1 of gas-liquid two-phase, with Fischer-Tropsch process exhaust gas
Source is connected by pipeline, and the bottom of towe of first rectifying column 1 is connected with mixed hydrocarbon discharge pipe；
For making the gas phase that first rectifying column 1 is isolated be further separated out the dehydrogenation tower 2 of hydrogen rich gas, with first rectifying column
1 gaseous phase outlet is connected by pipeline, and the hydrogen rich gas outlet of dehydrogenation tower 2 is connected with hydrogen rich gas discharge pipe；
For making the liquid that dehydrogenation tower is discharged isolate the methane tower 3 of liquefied natural gas, the liquid discharge with dehydrogenation tower 2 bottom of towe
Mouth is connected by pipeline, and methane tower 3 is passed through pipeline and is connected with rich carbon monoxide discharge pipe, the liquefied natural gas outlet of methane tower 3
It is connected with LNG discharge pipe.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, also includes azeotrope and follows
Ring refrigeration system, azeotrope cycle refrigeration system includes for compressing to azeotrope successively along azeotrope flow direction
Azeotrope compressor 100 and gas-liquid separator, pipeline connection first is passed through in the liquid-phase mixing cryogen outlet of gas-liquid separator
Choke valve 21, first throttle valve 11 connects the entrance of azeotrope compressor 100, the gas phase of gas-liquid separator by reflux pipe
The first pipeline, the second pipeline connection second throttle 22 are passed through in azeotrope outlet, and second throttle 22 passes through pipeline and backflow
Pipeline connection so that by described first throttle valve 21, second throttle 22 respectively throttle cooling after liquid-phase mixing cryogen, gas phase
Azeotrope is back to azeotrope compressor 100 after converging, azeotrope is in azeotrope compressor 100 and gas-liquid separator
Between circulate, the first pipeline is connected with the second pipeline after sequentially passing through the tower bottom reboiler 31 of heat exchanger 50, methane tower 3, second
Pipeline connects second throttle 22 after heat exchanger 50, and the azeotrope in the first pipeline is in the tower of heat exchanger 50, methane tower 3
Cool down in bottom reboiler 31, the azeotrope in the second pipeline provides cold in heat exchanger 50.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, also includes nitrogen refrigeration system
System, nitrogen refrigeration system includes nitrogen compressor 200 and the 3rd choke valve 23, and the outlet of nitrogen compressor 200 passes through the 3rd
Pipeline and the inlet communication of the 3rd choke valve 23, the outlet of the 3rd choke valve 23 is by the 4th pipeline and nitrogen compressor 200
Inlet communication, so that the nitrogen reflux after cooling is throttled to nitrogen compressor 200 by described 3rd choke valve 23, the 3rd pipeline,
4th pipeline cools down in heat exchanger 50 respectively through heat exchanger 50, the nitrogen in the 3rd pipeline, and the nitrogen in the 4th pipeline exists
Cold is provided in heat exchanger 50.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, mixed hydrocarbon discharge pipe, a rich oxygen
Change carbon discharge pipe, LNG discharge pipe, hydrogen rich gas discharge pipe respectively through heat exchanger 50.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, dehydrogenation tower 3 and the first rectification
Pipeline between the gaseous phase outlet of tower 1 passes through the 5th pipeline and methane tower through heat exchanger 50, the gaseous phase outlet of methane column overhead
Top separator 30 connects, and the gas outlet of methane overhead separator 30 is passed through pipeline and is connected with rich carbon monoxide discharge pipe, and the 5th
Pipeline is through heat exchanger 50.
Feed gas composition can be separated into liquefied natural gas, hydrogen rich gas, a rich oxidation by the technical solution of the utility model
Carbon gas.The technical solution of the utility model can improve the value of unstripped gas, has higher economic benefit.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, azeotrope compressor can
Think reciprocating compressor or centrifugal compressor, can be 1-4 level compressor.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, nitrogen compressor can be
Reciprocating compressor or centrifugal compressor, can be 1-4 level compressor.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, heat exchanger can be plate wing
Formula heat exchanger or wound tube heat exchanger.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, rectifying column can be board-like
Tower, packed tower, bubble column or valve tower.
The device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model, wherein, azeotrope can be nitrogen
Gas, methane, ethylene, ethylene, propane, propylene, iso-butane, normal butane, the combination in any of isopentane.
Tail gas separation can be become economic valency by the device using Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model
It is worth higher liquefied natural gas and hydrogen rich gas and rich carbon monoxide, the hydrogen rich gas after separating and rich carbon monoxide gas enter methanol and close
Become operation.
The working Examples of the device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas of the present utility model are as follows:
After Fischer-Tropsch process exhaust after purified process cools through heat exchanger 50, enter first rectifying column 1, the first essence
Evaporate tower 1 top gaseous phase to cool through heat exchanger 50, and isolate gas-liquid two-phase through the first overhead separator 10, liquid phase is again
Enter first rectifying column 1, the mixed hydrocarbon of first rectifying column 1 bottom of towe cooling box after rewarming, gas phase is again introduced into heat exchanger 50 and lowers the temperature；
Enter dehydrogenation tower 2, enter heat exchanger 50 in the gaseous component of dehydrogenation tower 2 tower top and cool further, and through the second tower top
Gas-liquid two-phase isolated by separator 20, and the hydrogen rich gas isolated is again introduced into ice chest, cooling box after rewarming to room temperature, and liquid phase is again
Enter dehydrogenation tower 2, the liquid of dehydrogenation tower 2 bottom of towe enters methane tower 3；The liquefied natural gas product that methane tower 3 bottom of towe is isolated is again
Secondary entrance heat exchanger 50, the liquefied natural gas product of -161 DEG C of output after cooled cooling, the gas phase of methane tower 3 tower top enters changes
Hot device 50 is lowered the temperature, and is again introduced into methane overhead separator 30, and the liquid phase isolated is again introduced into methane tower 3, and gas phase is again introduced into
Ice chest, provides cold for ice chest, last rewarming is to room temperature cooling box.
Azeotrope compressor exports two strands of cryogens, respectively liquid and gas, after liquid phase enters heat exchanger cooling, warp knuckle
Stream valve is throttled, and gas phase enters the tower bottom reboiler 31 of methane tower 3 after entering heat exchanger cooling, be finally again introduced into heat exchange
Device, is returned heat exchanger after choke valve throttling, is converged with liquid phase cryogen, final rewarming to room temperature cooling box, enters compressor and enters
Mouthful, complete the kind of refrigeration cycle of compressor.
The compressed nitrogen of nitrogen compressor output, enters heat exchanger, throttles, then after heat exchanger cooling and through choke valve
Enter heat exchanger, provide cold, last rewarming to room temperature cooling box for ice chest, eventually enter into the import of nitrogen compressor, complete
Compression circulation.
The above is only preferred implementation of the present utility model it is noted that ordinary skill people for the art
For member, on the premise of without departing from this utility model principle, some improvements and modifications can also be made, these improvements and modifications
Also should be regarded as protection domain of the present utility model.
Claims (5)
1. a kind of device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas is it is characterised in that include:
For making Fischer-Tropsch process exhaust cool down and isolating the first rectifying column of gas-liquid two-phase, pass through with Fischer-Tropsch process exhaust source of the gas
Pipeline connects, and the bottom of towe of first rectifying column is connected with mixed hydrocarbon discharge pipe；
For making the gas phase that first rectifying column is isolated be further separated out the dehydrogenation tower of hydrogen rich gas, the gas phase with first rectifying column
Outlet is connected by pipeline, and the hydrogen rich gas outlet of dehydrogenation tower is connected with hydrogen rich gas discharge pipe；
For making the liquid that dehydrogenation tower is discharged isolate the methane tower of liquefied natural gas, pass through with the liquid outlet of dehydrogenation tower bottom of towe
Pipeline connects, and methane tower is passed through pipeline and is connected with rich carbon monoxide discharge pipe, and the liquefied natural gas of methane tower exports and liquefaction sky
So gas discharge pipe connects.
2. the device using Fischer-Tropsch process exhaust preparing liquefied natural gas as claimed in claim 1 is it is characterised in that also include mixing
Close refrigerant cycle refrigeration system, described azeotrope cycle refrigeration system includes for mixed successively along azeotrope flow direction
Close azeotrope compressor and the gas-liquid separator of cryogen compression, the liquid-phase mixing cryogen outlet of described gas-liquid separator is passed through
Pipeline connection first throttle valve, described first throttle valve connects the entrance of azeotrope compressor, described gas by reflux pipe
The first pipeline, the second pipeline connection second throttle are passed through in the gas phase azeotrope outlet of liquid/gas separator, and second throttle is passed through
Pipeline is connected with reflux pipe, so that the liquid-phase mixing after cooling that throttled respectively by described first throttle valve, second throttle is cold
Agent, gas phase azeotrope are back to azeotrope compressor after converging, described azeotrope is in azeotrope compressor and gas-liquid
Circulate between separator, the first pipeline is sequentially passed through heat exchanger, is connected with the second pipeline after the tower bottom reboiler of methane tower, second
Pipeline cools down in heat exchanger, the tower bottom reboiler of methane tower through the azeotrope in heat exchanger, the first pipeline, the second pipeline
In azeotrope cold is provided in heat exchanger.
3. the device using Fischer-Tropsch process exhaust preparing liquefied natural gas as claimed in claim 2 is it is characterised in that also include nitrogen
Gas refrigeration system, described nitrogen refrigeration system includes nitrogen compressor and the 3rd choke valve, and the outlet of nitrogen compressor is passed through
3rd pipeline and the inlet communication of the 3rd choke valve, the import of the 4th pipeline and nitrogen compressor is passed through in the outlet of the 3rd choke valve
Connection, so that the nitrogen reflux after being lowered the temperature by described 3rd choke valve throttling is to nitrogen compressor, the 3rd pipeline, the 4th pipeline divide
Not through heat exchanger, the nitrogen in the 3rd pipeline cools down in heat exchanger, and the nitrogen in the 4th pipeline provides cold in heat exchanger
Amount.
4. the device of utilization Fischer-Tropsch process exhaust preparing liquefied natural gas as claimed in claim 3 is it is characterised in that mixed hydrocarbon is discharged
Pipe, rich carbon monoxide discharge pipe, LNG discharge pipe, hydrogen rich gas discharge pipe are respectively through heat exchanger.
5. utilization Fischer-Tropsch process exhaust preparing liquefied natural gas as claimed in claim 4 device it is characterised in that dehydrogenation tower with
Pipeline between the gaseous phase outlet of first rectifying column passes through the 5th pipeline and first through heat exchanger, the gaseous phase outlet of methane column overhead
Alkane overhead separator connects, and the gas outlet of methane overhead separator is passed through pipeline and is connected with rich carbon monoxide discharge pipe, and the 5th
Pipeline is through heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620856519.4U CN205893188U (en) | 2016-08-09 | 2016-08-09 | Utilize ft synthesis tail gas system liquefied natural gas's device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620856519.4U CN205893188U (en) | 2016-08-09 | 2016-08-09 | Utilize ft synthesis tail gas system liquefied natural gas's device |
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| CN205893188U true CN205893188U (en) | 2017-01-18 |
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| CN201620856519.4U Active CN205893188U (en) | 2016-08-09 | 2016-08-09 | Utilize ft synthesis tail gas system liquefied natural gas's device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979666A (en) * | 2017-04-19 | 2017-07-25 | 苏州市兴鲁空分设备科技发展有限公司 | Methane purifying plant |
| CN114777421A (en) * | 2022-03-31 | 2022-07-22 | 中科瑞奥能源科技股份有限公司 | System and method for purifying hydrogen chloride from chloroacetic acid or chloroacetyl chloride synthesis tail gas |
-
2016
- 2016-08-09 CN CN201620856519.4U patent/CN205893188U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979666A (en) * | 2017-04-19 | 2017-07-25 | 苏州市兴鲁空分设备科技发展有限公司 | Methane purifying plant |
| CN114777421A (en) * | 2022-03-31 | 2022-07-22 | 中科瑞奥能源科技股份有限公司 | System and method for purifying hydrogen chloride from chloroacetic acid or chloroacetyl chloride synthesis tail gas |
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