CN206755735U - Liquid CO circularly cooling synthesising gas systeming carbinol coproduction LNG devices - Google Patents
Liquid CO circularly cooling synthesising gas systeming carbinol coproduction LNG devices Download PDFInfo
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- CN206755735U CN206755735U CN201720455552.0U CN201720455552U CN206755735U CN 206755735 U CN206755735 U CN 206755735U CN 201720455552 U CN201720455552 U CN 201720455552U CN 206755735 U CN206755735 U CN 206755735U
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Abstract
The utility model discloses a kind of liquid CO circularly coolings synthesising gas systeming carbinol coproduction LNG devices.The device includes heat exchanger, scrubbing tower, methane rectifier column, separator, first throttle valve, second throttle, the 3rd choke valve, the 4th choke valve, compressor, expanding machine, molecular sieve adsorber, methanol pipeline processed, CO circulation lines and coproduction LNG pipelines, and reboiler is provided with inside described methane rectifier column bottom of towe.The CH4 washed using the utility model removing upstream low-temp methanol in the purification gas of process, is finally made high purity carbon hydrogen-oxygen ratio as 1:4:1 synthesis gas, produced for synthesizing methanol, while the methane-rich liquid isolated obtains LNG after methane rectifier column separates.The ingenious combination richness CO compression mechanism SAPMAC methods of the utility model, equipment investment is reduced, reduce the gross efficiency that kind of refrigeration cycle energy consumption improves device simultaneously.
Description
Technical field
It the utility model is related to chemical industry cryogenic purification device, more particularly to a kind of liquid CO circularly coolings synthesising gas systeming carbinol connection
Produce LNG devices.
Background technology
Methanol is a kind of important Organic Chemicals, is widely used, and can be used for producing Organic chemical products, but also
Gasoline can be added to mix burning or replace gasoline as power fuel and for synthesizing methanol albumen.With petroleum resources increasingly
The reduction with methanol unit cost is reduced, has become a kind of trend by the use of methanol as new petrochemical material source.
Tradition methanol with joint production LNG devices, are generally introduced into high-pressure rectification tower by unstripped gas, then enter back into low-pressure distillation
Tower, obtain rich H2 gas, rich CO gas and LNG.This method efficiency is low, high energy consumption, to take up an area periodic off-gases flow in big, synthesis gas big,
The energy consumption of compressor of next procedure is added, production cost is higher.In refrigerative circle system, freezed using nitrogen circulation and mixed
Cryogen refrigeration circulation is closed, it is necessary to separately set up standby, increases the complexity of system.
The content of the invention
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of liquid CO circularly cooling synthesising gas systeming carbinols
Coproduction LNG devices and its application method.
A kind of liquid CO circularly coolings synthesising gas systeming carbinol coproduction LNG devices, it is characterised in that including heat exchanger, scrubbing tower,
Methane rectifier column, separator, first throttle valve, second throttle, the 3rd choke valve, the 4th choke valve, compressor, expanding machine,
Molecular sieve adsorber, methanol pipeline processed, tributary b, tributary c, tributary g, tributary h, tributary j, tributary k, CO circulation line and coproduction
LNG pipelines, described methane rectifier column bottom of towe inside are provided with reboiler；
Methanol pipeline processed is connected through molecular sieve adsorber and heat exchanger with the reboiler inside methane rectifier column bottom of towe, then
The outlet of boiling device again passes through heat exchanger by tributary b and is connected with separator inlet；
Separator outlet is divided into two-way up and down, and upper road is connected by tributary c through heat exchanger with scrubbing tower bottom；Scrubbing tower bottom
Portion is connected through second throttle by coproduction LNG pipelines through heat exchanger with methane rectifier column bottom；Managed by coproduction LNG on lower road
The choke valves of Lu Jing tetra- in the middle part of methane rectifier column with being connected；
It is connected at the top of methane rectifier column by CO circulation lines through heat exchanger with suction port of compressor, compressor outlet is divided into
Tributary j and tributary k, tributary j are connected through heat exchanger with scrubbing tower top；Tributary k accesses compressor through heat exchanger and expanding machine
Entrance forms loop；
It is connected at the top of described scrubbing tower by methanol pipeline processed through heat exchanger with extraneous methanol synthesizer.
Described methane rectifier column bottom is divided into tributary g and tributary h by coproduction LNG pipelines, and tributary g sequentially passes through the 3rd
Choke valve and heat exchanger are connected with extraneous high methane gas compressor；Tributary h sequentially passes through heat exchanger and first throttle valve and the external world
LNG product storage tank connects.
Described compressor and expanding machine forms kind of refrigeration cycle by CO circulation lines, and kind of refrigeration cycle is using CO as refrigeration
Agent, low-temperature receiver is provided for heat exchanger, while liquid CO caused by compressor compresses is inputted in scrubbing tower, as cleaning solution.
Liquid CO circularly cooling synthesising gas systeming carbinol coproduction LNG devices, in addition to regenerating molecular sieve system, molecular sieve pipeline,
Described molecular sieve adsorber is connected by molecular sieve pipeline with regenerating molecular sieve system.
Described molecular sieve adsorber has two or three, and its built-in molecular sieve, two are used together, during large-scale production,
3rd is used for regeneration cycle, three automatic switchovers.
Using the utility model, will first be separated in the separator after unstripped gas partial condensation, gas is in scrubbing tower through liquid
State CO is washed to form hydrogen-rich synthetic gas, and carrying device is used for methanol processed, and remaining kettle liquid is delivered to separator bottom methane rich liquid
Methane rectifier column coproduction LNG, overall energy consumption reduce, and periodic off-gases flow reduces in synthesis gas, reduce the compressor of next procedure
Energy consumption.Dexterously rich CO compressors and kind of refrigeration cycle are combined, compressor is product compressor, and is provided for device
Cold, reduce a dynamic equipment, investment reduction, improve the gross efficiency of device, save energy consumption.
Brief description of the drawings
Fig. 1 is liquid CO circularly cooling synthesising gas systeming carbinol coproduction LNG schematic devices；
Fig. 2 is liquid CO circularly cooling synthesising gas systeming carbinol coproduction LNG device molecular sieve adsorber schematic diagrames；
In figure, heat exchanger 1, scrubbing tower 2, methane rectifier column 3, separator 4, first throttle valve 5, second throttle the 6, the 3rd
Choke valve 7, the 4th choke valve 8, compressor 9, expanding machine 10, reboiler 11, molecular sieve adsorber 12, regenerating molecular sieve system
13。
Embodiment
As shown in figure 1, liquid CO circularly cooling synthesising gas systeming carbinol coproduction LNG devices, including heat exchanger 1, scrubbing tower 2, first
It is alkane rectification tower 3, separator 4, first throttle valve 5, second throttle 6, the 3rd choke valve 7, the 4th choke valve 8, compressor 9, swollen
Swollen machine 10, molecular sieve adsorber 12, methanol pipeline processed, tributary b, tributary c, tributary g, tributary h, tributary j, tributary k, CO circulation pipe
Road and coproduction LNG pipelines, the described bottom of towe of methane rectifier column 3 inside are provided with reboiler 11；
Methanol pipeline processed passes through molecular sieve adsorber 12 and heat exchanger 1 and the reboiler 11 inside the bottom of towe of methane rectifier column 3
Connection, the outlet of reboiler 11 again pass through heat exchanger 1 by tributary b and are connected with the entrance of separator 4；
The outlet of separator 4 is divided into two-way up and down, and upper road is connected by tributary c through heat exchanger 1 with the bottom of scrubbing tower 2；Washing
The bottom of tower 2 is connected through second throttle 6 by coproduction LNG pipelines through heat exchanger 1 with the bottom of methane rectifier column 3；Lower road passes through
Coproduction LNG pipelines are connected through the 4th choke valve 8 with the middle part of methane rectifier column 3；
The top of methane rectifier column 3 is connected by CO circulation lines through heat exchanger 1 with the entrance of compressor 9, and compressor 9 exports
It is divided into tributary j and tributary k, tributary j is connected through heat exchanger 1 with the top of scrubbing tower 2；Tributary k connects through heat exchanger 1 and expanding machine 10
Enter the entrance of compressor 9 and form loop；
The top of scrubbing tower 2 is connected by methanol pipeline processed through heat exchanger 1 with extraneous methanol synthesizer.
The bottom of methane rectifier column 3 is divided into tributary g and tributary h by coproduction LNG pipelines, and tributary g sequentially passes through the 3rd throttling
Valve 7 and heat exchanger 1 are connected with extraneous high methane gas compressor；Tributary h sequentially passes through heat exchanger 1 and first throttle valve 5 and the external world
LNG product storage tank connects.
Compressor 9 and expanding machine 10 form kind of refrigeration cycle by CO circulation lines, kind of refrigeration cycle using CO as refrigerant,
Low-temperature receiver is provided for heat exchanger 1, while compressor 9 is compressed in caused liquid CO input scrubbing towers 2, as cleaning solution.
As shown in Fig. 2 molecular sieve adsorber 12 is connected by molecular sieve pipeline with regenerating molecular sieve system 13；
Molecular sieve adsorber has two or three, and its built-in molecular sieve, two are used together, during large-scale production, the 3rd
For regeneration cycle, three automatic switchovers.
As shown in Fig. 2 the application method of liquid CO circularly cooling synthesising gas systeming carbinol coproduction LNG devices, comprises the following steps：
1) unstripped gas Q inputs molecular sieve adsorber 12, which removes, is easily frozen into point methanol and carbon dioxide, obtained separating methanol two
Raw material of carbon oxide gas a is cooled down in heat exchanger 1 with hydrogen-rich synthetic gas d, rich carbon monoxide gas i countercurrent flows, is arrived through reboiler 11
Partial condensation after certain temperature, tributary b enter separator 4；
2) the top gas tributary c of separator 4 continues to cool down through heat exchanger 1 enters the bottom of scrubbing tower 2, the quilt in scrubbing tower 2
The liquid CO that tributary j is flowed into absorbs CH4, N2, obtains hydrogen-rich synthetic gas d, hydrogen-rich synthetic gas d, goes out from scrubbing tower top
Come after heat exchanger 1 exchanges heat recovery cold, be sent to extraneous methanol synthesizer；
3) the bottom methane-rich liquid f of separator 4 and the bottom kettle liquid e of scrubbing tower 2 are respectively through the 4th choke valve 8 and second throttle
Enter methane rectifier column 3 after 6 decompressions, the bottom of towe of methane rectifier column 3 obtains LNG, is divided into tributary g through Section three through coproduction LNG pipelines
The decompression of stream valve 7 and the supercooling of heat exchanger 1 are sent into LNG product storage tank, another tributary h warps after delivering to extraneous high methane gas compressor compresses
Heat exchanger 1 is subcooled and extraneous LNG product storage tank is delivered in the decompression of first throttle valve 5；
4) the tower top richness carbon monoxide gas i of methane rectifier column 3 compresses after heat exchanger 1 exchanges heat recovery cold into compressor 9
After be divided into two, after tributary j is subcooled in heat exchanger 1, is passed through scrubbing tower 2 and phegma be provided, for washing, another tributary k by
Heat exchanger 1 returns to heat exchanger 1 after the expansion of expanding machine 10 after cooling and provides cold, returns again to the entrance of compressor 9 progress enclosed and follows
Ring.
Claims (6)
1. a kind of liquid CO circularly coolings synthesising gas systeming carbinol coproduction LNG devices, it is characterised in that including heat exchanger (1), scrubbing tower
(2), methane rectifier column (3), separator (4), first throttle valve (5), second throttle (6), the 3rd choke valve (7), Section four
Flow valve (8), compressor (9), expanding machine (10), molecular sieve adsorber (12), methanol pipeline processed, tributary b, tributary c, tributary g, branch
H, tributary j, tributary k, CO circulation line and coproduction LNG pipelines are flowed, reboiler is provided with inside described methane rectifier column (3) bottom of towe
(11)；
Methanol pipeline processed passes through molecular sieve adsorber (12) and heat exchanger (1) and the reboiler inside methane rectifier column (3) bottom of towe
(11) connect, reboiler (11) outlet again passes through heat exchanger (1) by tributary b and is connected with separator (4) entrance；
Separator (4) outlet is divided into two-way up and down, and upper road is connected by tributary c through heat exchanger (1) with scrubbing tower (2) bottom；Wash
Tower (2) bottom is washed by coproduction LNG pipelines through second throttle (6) through heat exchanger (1) and methane rectifier column (3) bottom to connect
Connect；Lower road is by coproduction LNG pipelines through the 4th choke valve (8) with being connected in the middle part of methane rectifier column (3)；
It is connected at the top of methane rectifier column (3) by CO circulation lines through heat exchanger (1) with compressor (9) entrance, compressor (9)
Outlet is divided into tributary j and tributary k, and tributary j is connected through heat exchanger (1) with scrubbing tower (2) top；Tributary k through heat exchanger (1) and
Expanding machine (10) access compressor (9) entrance forms loop.
2. liquid CO circularly coolings synthesising gas systeming carbinol coproduction LNG devices according to claim 1, it is characterised in that described
It is connected at the top of scrubbing tower (2) by methanol pipeline processed through heat exchanger (1) with extraneous methanol synthesizer.
3. liquid CO circularly coolings synthesising gas systeming carbinol coproduction LNG devices according to claim 1, it is characterised in that described
Methane rectifier column (3) bottom is divided into tributary g and tributary h by coproduction LNG pipelines, tributary g sequentially pass through the 3rd choke valve (7) and
Heat exchanger (1) is connected with extraneous high methane gas compressor；Tributary h sequentially passes through heat exchanger (1) and first throttle valve (5) and the external world
LNG product storage tank connects.
4. liquid CO circularly coolings synthesising gas systeming carbinol coproduction LNG devices according to claim 1, it is characterised in that described
Compressor (9) and expanding machine (10) form kind of refrigeration cycle by CO circulation lines, and kind of refrigeration cycle uses CO as refrigerant, to change
Hot device (1) provides low-temperature receiver, while in liquid CO input scrubbing towers (2) caused by compressor (9) compression, as cleaning solution.
5. liquid CO circularly coolings synthesising gas systeming carbinol coproduction LNG devices according to claim 1, it is characterised in that also include
Regenerating molecular sieve system (13), molecular sieve pipeline, described molecular sieve adsorber (12) by molecular sieve pipeline and molecular sieve again
Raw system (13) connection.
6. liquid CO circularly coolings synthesising gas systeming carbinol coproduction LNG devices according to claim 1 or 5, it is characterised in that institute
The molecular sieve adsorber (12) stated has two or three, and its built-in molecular sieve, two are used together, during large-scale production, the 3rd
For regeneration cycle, three automatic switchovers.
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| CN201720455552.0U CN206755735U (en) | 2017-04-27 | 2017-04-27 | Liquid CO circularly cooling synthesising gas systeming carbinol coproduction LNG devices |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084594A (en) * | 2017-04-27 | 2017-08-22 | 杭州中泰深冷技术股份有限公司 | A kind of liquid CO circularly coolings synthesising gas systeming carbinol coproduction LNG devices and its application method |
-
2017
- 2017-04-27 CN CN201720455552.0U patent/CN206755735U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084594A (en) * | 2017-04-27 | 2017-08-22 | 杭州中泰深冷技术股份有限公司 | A kind of liquid CO circularly coolings synthesising gas systeming carbinol coproduction LNG devices and its application method |
| CN107084594B (en) * | 2017-04-27 | 2022-07-26 | 杭州中泰深冷技术股份有限公司 | Device for preparing methanol and coproducing LNG (liquefied Natural gas) by using liquid CO circulating refrigeration synthesis gas and use method thereof |
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