CN206652355U - A kind of processing unit of cobalt-based fixed bed F- T synthesis off-gas - Google Patents
A kind of processing unit of cobalt-based fixed bed F- T synthesis off-gas Download PDFInfo
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- CN206652355U CN206652355U CN201720333157.5U CN201720333157U CN206652355U CN 206652355 U CN206652355 U CN 206652355U CN 201720333157 U CN201720333157 U CN 201720333157U CN 206652355 U CN206652355 U CN 206652355U
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Abstract
It the utility model is related to F- T synthesis field, more particularly to a kind of processing unit of cobalt-based fixed bed F- T synthesis off-gas, including off-gas fractional condensing unit, LPG scrubbing towers, water scrubber and cryogenic separation cold washing tower, it is simple in construction, securely and reliably, the active principle of cobalt-based fixed bed F- T synthesis off-gas is efficiently separated out, improves the economic benefit of cobalt-based fixed bed F- T synthesis.
Description
Technical field
It the utility model is related to F- T synthesis field, and in particular to a kind of processing of cobalt-based fixed bed F- T synthesis off-gas
Device.
Background technology
Cobalt-based fixed bed F- T synthesis is one of ICL for Indirect Coal Liquefaction technology, and it refers to synthesis gas (CO and H2) exist for raw material
The technical process of paraffin hydrocarbon is synthesized under the conditions of catalyst and appropriate reaction.Fischer-Tropsch tailgas disposing is always the important of F- T synthesis
Part, environmental protection and factory economy benefit are all had a certain impact.
The active principle of co-based fischer-tropsch off-gas has CO, H2、LPG（Liquefied Petroleum Gas abbreviation, liquid
Liquefied oil gas, key component are propane and butane, there is a small amount of propylene and butylene）And LNG（liquefied natural gas
Abbreviation, liquefied natural gas, main component is methane CH4）, impurity gas component has carbon dioxide, nitrogen, organic acid, alcohol, alkene
Hydrocarbon etc..
The processing of iron-based or cobalt-based syrup state bed Fischer Tropsch off-gas is more ripe at present, and main process route has：Steam turns
Change+carbon monodixe conversion+PSA puies forward hydrogen method, and (Pressure Swing Adsorption abbreviation, pressure-variable adsorption carries hydrogen, according to suction
Attached dose, at various pressures to the selectively removing foreign gas of gas, obtains high-purity hydrogen)；Alkaline process decarburization+oil wash+part
Circulation/part PSA carries hydrogen etc..
But cobalt-based fixed bed F- T synthesis is paraffin wax product, the off-gas that device emits and slurry bed system difference compared with
Greatly, methane content is higher, and carbon dioxide content is relatively low, containing acid, containing fusel, heavy hydrocarbon wider distribution, and following process device hydrogen
Gas demand is few.Many problems be present if using the process route of syrup state bed Fischer Tropsch tailgas disposing, such as alkaline process decarburization
Cobalt-based fixed bed Fischer-Tropsch off-gas is not applied to, steam reformer investment is high, energy consumption is big, is also one to byproduct methane resource
Kind wastes.The cobalt-based fixed bed Fischer Tropsch Facility having been carried out both at home and abroad is less, most of device to discharge tolerance smaller, do not return
Effective gas component is received, but is used directly as fuel gas.
A kind of in consideration of it, the defects of overcoming the above in the prior art, there is provided place of cobalt-based fixed bed F- T synthesis off-gas
Managing device turns into this area technical problem urgently to be resolved hurrily.
Utility model content
The shortcomings that the purpose of this utility model is to overcome prior art, there is provided a kind of cobalt-based fixed bed F- T synthesis discharges
The processing unit of gas, effective product in cobalt-based fixed bed F- T synthesis off-gas is reclaimed, avoid the wasting of resources and environment is dirty
Dye, securely and reliably, economical rationality.
The purpose of this utility model can be realized by following technical measures：
A kind of processing unit of cobalt-based fixed bed F- T synthesis off-gas, it is located at F- T synthesis device and Fischer-Tropsch water process
Between device, it is characterised in that it includes
Off-gas fractional condensing unit, the off-gas fractional condensing unit include be sequentially communicated one-level cooling device,
One-level liquid separation tank, two level cooling device and two level liquid separation tank, the one-level cooling device air inlet and the F- T synthesis device
The connection of off-gas outlet, the one-level liquid separation tank and the two level liquid separation tank are respectively arranged with the first heavy hydrocarbon outlet and the
Two heavy hydrocarbon outlets；
LPG scrubbing towers, the LPG scrubbing towers top are provided with LPG input ports and LPG scrubbing tower exhaust outlets, and the LPG is washed
Wash tower bottom and be provided with LPG scrubbing towers air inlet and the 3rd heavy hydrocarbon outlet, the LPG scrubbing towers air inlet and two fraction
Flow container gas outlet connects；
Water scrubber, the water scrubber top are provided with washing gas outlet, and the water scrubber bottom is provided with water scrubber and entered
Gas port and washings outlet, the water scrubber air inlet connect with the LPG scrubbing towers exhaust outlet, the washings outlet
It is communicated to the Fischer-Tropsch water treatment facilities；
With
Cryogenic separation cold washing tower, cold washing tower air inlet, tail are provided with the cryogenic separation cold washing tower
Gas outlet, LNG outlets and LPG outlets, the cryogenic separation cold washing tower air inlet are described with the water scrubber
Wash the connection of gas outlet.
By above technical scheme, wherein the water scrubber is provided with two sections filler.
By above technical scheme, wherein the first heavy hydrocarbon outlet, the second heavy hydrocarbon outlet and described triple
Hydrocarbon outlet is communicated to hydro-refining unit after converging.
By above technical scheme, wherein LPG scrubbing towers exhaust outlet is communicated to the two level cooling device, by the two level
The heat exchange pipeline of cooling device, then it is communicated to the water scrubber air inlet.
By above technical scheme, wherein the LPG outlets of the cryogenic separation cold washing tower are communicated to the LPG
The LPG input ports of scrubbing tower.
Brief description of the drawings
Fig. 1 is the utility model embodiment structural representation.
Wherein：1- F- T synthesis devices, 101- off-gas outlets, 201- one-level cooling devices, 2011- one-levels cooling dress
Put air inlet, 202- one-level liquid separation tanks, 2021- the first heavy hydrocarbon outlets, 203- two level cooling devices, 204- two level liquid separation tanks,
2041- the second heavy hydrocarbon outlets, 2042- two level liquid separation tanks gas outlet, 3-LPG scrubbing towers, 301-LPG input ports, 302-LPG are washed
Wash tower exhaust outlet, 303-LPG scrubbing tower air inlets, the heavy hydrocarbon outlets of 304- the 3rd, 4- water scrubbers, 401- washing gas outlets,
402- water scrubber air inlets, 403- washings outlets, 5- cryogenic separation cold washing towers, 501- cold washing tower air inlets,
502- tail gas outlets, 503-LNG outlets, 504-LPG outlets, 6- Fischer-Tropsch water treatment facilities, 7- hydro-refining units.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with the accompanying drawings and specifically
Application examples is described in further detail to the utility model.It should be appreciated that concrete application example described herein is only solving
The utility model is released, is not used to limit the utility model.
The composition of cobalt-based fixed bed Fischer-Tropsch off-gas is sufficiently complex, effective gas component have methane, carbon monoxide, hydrogen, C1 ~
C10 n-alkanes, impurity gas component have carbon dioxide, nitrogen, organic acid, alcohol, alkene etc..Wherein hydrogen and carbon monoxide volume
For fraction sum more than 60%, methane volumetric fraction, in order to fully reclaim effective gas, improves the economy of process units more than 25%,
It is to produce LNG, tail gas by cryogenic separation to need to extract effective gas, the more rational techniques such as methane, hydrogen and carbon monoxide
Hydrogen is carried by PSA again, but cryogenic separation device requires to unstripped gas, must not contain heavy hydrocarbon, acid and alcohol etc., and heavy hydrocarbon can block deep cooling
The ice chest of separation, acid and alcohol can cause decarburizer to foam.
A kind of processing unit of cobalt-based fixed bed F- T synthesis off-gas provided by the utility model, pass through simple pre- place
Reason can meet the requirement of follow-up cryogenic separation device, and flow is simple, operation is flexible, saves the energy.
Specifically, refer to shown in Fig. 1, a kind of processing dress of cobalt-based fixed bed F- T synthesis off-gas of the present utility model
Put, between F- T synthesis device 1 and Fischer-Tropsch water treatment facilities 6, it includes off-gas fractional condensing unit, LPG washings for it
Tower 3, water scrubber 4 and cryogenic separation cold washing tower 5.
Wherein, off-gas fractional condensing unit includes one-level cooling device 201, the one-level liquid separation tank 202, two being sequentially communicated
Level cooling device 203 and two level liquid separation tank 204, the off-gas of one-level cooling device air inlet 2011 and F- T synthesis device are discharged
Mouth 101 connects, and one-level liquid separation tank 202 and two level liquid separation tank 204 are respectively arranged with the first heavy hydrocarbon outlet 2021 and the second heavy hydrocarbon
Outlet 2041.
Wherein, the top of LPG scrubbing towers 3 is provided with LPG input ports 301 and LPG scrubbing towers exhaust outlet 302, and bottom is set
There are LPG scrubbing towers air inlet 303 and the 3rd heavy hydrocarbon outlet 304, LPG scrubbing towers air inlet 303 and two level liquid separation tank gas outlet
2042 connections.
Wherein, the top of water scrubber 4 is provided with washing gas outlet 401, and bottom is provided with water scrubber air inlet 402 and washed
Water outlet 403 is washed, water scrubber air inlet 402 connects with LPG scrubbing towers exhaust outlet 302, and washings outlet 403 is communicated to expense
Hold in the palm water treatment facilities 6.
Wherein, cold washing tower air inlet 501, tail gas outlet 502, LNG are provided with cryogenic separation cold washing tower 5
Outlet 503 and LPG outlets 504, the washing gas outlet 401 of cryogenic separation cold washing tower air inlet 501 and water scrubber
Connection.
Application examples 1
The application example provides the method that cobalt-based fixed bed F- T synthesis tailgas disposing is carried out using above-mentioned processing unit,
Specifically comprise the following steps：
S101, classification precooling：Cobalt-based fixed bed F- T synthesis off-gas is pre- by the recirculated water of one-level cooling device 201
It is cooled to 35 ~ 45 DEG C, through 202 isolated first heavy hydrocarbon of one-level liquid separation tank and the first separation gas, the first separation gas is passed through
Two level cooling device 203 exchanges heat and refrigerant is cooled to 3 ~ 7 DEG C, through 204 isolated second heavy hydrocarbon of two level liquid separation tank and second
Separate gas.
S102, LPG are washed：Second separation gas is sent into LPG scrubbing towers 3 by LPG scrubbing towers air inlet 303, LPG by
LPG scrubbing towers 3 are sent into LPG input ports 301, and the 3rd heavy hydrocarbon and the 3rd separation gas are obtained through the washing of LPG scrubbing towers 3.
S103, heavy hydrocarbon collection processing：First heavy hydrocarbon, the second heavy hydrocarbon and the 3rd heavy hydrocarbon pass through the first heavy hydrocarbon outlet respectively
2021st, hydro-refining unit 7 is sent into after the second heavy hydrocarbon outlet 2041 and the 3rd heavy hydrocarbon outlet 304 are discharged and converged.
S104, water washing：By the 3rd separation gas heating to being sent into water scrubber 4 after 25 ~ 35 DEG C, by washing go deacidification and
Obtain washing gas after fusel, by the way of two sections washing, it is qualified that epimere washing is handled using Fischer-Tropsch water treatment facilities 6
Recycle-water and fresh water, hypomere washing use bottom of towe part recirculation water, and remaining bottom of towe water is extracted out by the washings outlet 403
After be sent into the Fischer-Tropsch water treatment facilities 6.
S105, cryogenic separation：Washing pneumatic transmission is entered into cryogenic separation device cold washing tower 5, washed by ice chest condensate liquid,
LPG is isolated, obtains LNG, tail gas carries hydrogen by PSA, and LPG is by being sent into LPG scrubbing towers 3 after heating, for being separated to second
The washing of gas.
The advantages of the application example processing method, is:Check on, separate step by step step by step, be classified precooling and LPG washings are thoroughly gone
Except the heavy hydrocarbon in off-gas；Washing removes the acid and fusel in off-gas, and uses two sections of water-washing methods, removes more thorough,
More save water and energy；The LPG that cryogenic separation device cold washing tower is isolated sends the recycling of LPG scrubbing towers back to, energy-saving.
Package unit technique is simple, securely and reliably, saves the energy, has effectively reclaimed the gas componant with economic benefit.
Preferred application example of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (5)
1. a kind of processing unit of cobalt-based fixed bed F- T synthesis off-gas, it is located at F- T synthesis device and Fischer-Tropsch water process dress
Between putting, it is characterised in that it includes
Off-gas fractional condensing unit, the off-gas fractional condensing unit include one-level cooling device, the one-level being sequentially communicated
Liquid separation tank, two level cooling device and two level liquid separation tank, the relaxation of the one-level cooling device air inlet and the F- T synthesis device
Deflation outlet connects, and the one-level liquid separation tank and the two level liquid separation tank are respectively arranged with the first heavy hydrocarbon outlet and the second weight
Hydrocarbon outlet；
LPG scrubbing towers, the LPG scrubbing towers top are provided with LPG input ports and LPG scrubbing tower exhaust outlets, the LPG scrubbing towers
Bottom is provided with LPG scrubbing towers air inlet and the 3rd heavy hydrocarbon outlet, the LPG scrubbing towers air inlet and the two level liquid separation tank
Gas outlet connects；
Water scrubber, the water scrubber top are provided with washing gas outlet, and the water scrubber bottom is provided with water scrubber air inlet
With washings outlet, the water scrubber air inlet connects with the LPG scrubbing towers exhaust outlet, the washings outlet connection
To the Fischer-Tropsch water treatment facilities；
With
Cryogenic separation cold washing tower, cold washing tower air inlet, tail gas row are provided with the cryogenic separation cold washing tower
Outlet, LNG outlets and LPG outlets, the washing of the cryogenic separation cold washing tower air inlet and the water scrubber
Gas outlet connects.
A kind of 2. processing unit of cobalt-based fixed bed F- T synthesis off-gas according to claim 1, wherein the washing
Tower is provided with two sections filler.
A kind of 3. processing unit of cobalt-based fixed bed F- T synthesis off-gas according to claim 1, wherein described first
Heavy hydrocarbon outlet, the second heavy hydrocarbon outlet and the 3rd heavy hydrocarbon outlet are communicated to hydro-refining unit after converging.
4. a kind of processing unit of cobalt-based fixed bed F- T synthesis off-gas according to claim 1, wherein LPG scrubbing towers
Exhaust outlet is communicated to the two level cooling device, by the heat exchange pipeline of the two level cooling device, then is communicated to the washing
Tower air inlet.
A kind of 5. processing unit of cobalt-based fixed bed F- T synthesis off-gas according to claim 1, wherein the deep cooling
The LPG outlets of separation cold washing tower are communicated to the LPG input ports of the LPG scrubbing towers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720333157.5U CN206652355U (en) | 2017-03-31 | 2017-03-31 | A kind of processing unit of cobalt-based fixed bed F- T synthesis off-gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720333157.5U CN206652355U (en) | 2017-03-31 | 2017-03-31 | A kind of processing unit of cobalt-based fixed bed F- T synthesis off-gas |
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| CN206652355U true CN206652355U (en) | 2017-11-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106938170A (en) * | 2017-03-31 | 2017-07-11 | 武汉金中石化工程有限公司 | A kind of processing unit and processing method of cobalt-based fixed bed F- T synthesis off-gas |
-
2017
- 2017-03-31 CN CN201720333157.5U patent/CN206652355U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106938170A (en) * | 2017-03-31 | 2017-07-11 | 武汉金中石化工程有限公司 | A kind of processing unit and processing method of cobalt-based fixed bed F- T synthesis off-gas |
| CN106938170B (en) * | 2017-03-31 | 2023-02-28 | 武汉金中石化工程有限公司 | Treatment device and treatment method for Fischer-Tropsch synthesis purge gas of cobalt-based fixed bed |
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