CN206591093U - Coke-stove gas makes liquefied natural gas plant - Google Patents
Coke-stove gas makes liquefied natural gas plant Download PDFInfo
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- CN206591093U CN206591093U CN201720244028.9U CN201720244028U CN206591093U CN 206591093 U CN206591093 U CN 206591093U CN 201720244028 U CN201720244028 U CN 201720244028U CN 206591093 U CN206591093 U CN 206591093U
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Abstract
The utility model provides a kind of coke-stove gas and makes liquefied natural gas plant.The coke-stove gas, which makes liquefied natural gas plant, includes compression section (1), desulfurization workshop section (2), synthesizing section (3), liquefaction workshop section (4), liquefaction workshop section (4) is provided with adjustable decarbonization device (5), and adjustable decarbonization device (5) includes absorption tower, desorber, stripper (11).Liquefied natural gas plant is made according to coke-stove gas of the present utility model, ice chest is solved and is frequently occluded, the problem of often stopping reduces fault rate, has retrieved economic loss.
Description
Technical field
The utility model is related to coal tar furnace gas and produces natural gas field, and in particular to it is natural that a kind of coke-stove gas makes liquefaction
Device of air.
Background technology
Methane is the main component of natural gas, is a kind of cleaning, the efficient energy, the row of sulfur dioxide and dust after burning
Nearly 100% is high-volume reduced, the carbon dioxide and oxynitrides of generation are only the 50% and 20% of coal, are polluted for liquefied petroleum gas
1/4, the 1/800 of coal.Therefore natural gas is all classified as preferred fuels by many countries, and ratio of the natural gas in energy supply is fast
Speed increase.Can greatly save storage and transportation space and cost after methane liquefaction, and with the features such as calorific value is big, performance is high, just with
Annual about 12% rapid growth, increases one of most swift and violent energy industry as the whole world.Current whole world Natural Gas Consumption Using is
Up to annual 2.32 trillion m3, the 24.3% of world's primary energy total demand is accounted for, natural gas turns into rare cleaning resource, just
As the new focus of world's oil and gas industry, it is being also the emphasis of China's development low-carbon economy and clear energy sources.
Coke-stove gas, refers to be configured to coal for coking with several bituminous coal, in coke oven after high-temperature retorting, in output
Produced a kind of imflammable gas while coke and tar product, is the byproduct of coking industry.The composition of coke-stove gas
Middle CH4Content is about 25~30%, CO, CO2Content nearly 10%, remaining is hydrogen and a small amount of nitrogen, therefore coke-stove gas passes through methanation
Reaction, can make most CO, CO2Change into CH4, obtain mainly containing H2、CH4、N2Mixed gas, can be with through cryogenic liquefying
Obtain the liquefied methane (LNG) of methane volumetric fraction more than 90%.Produced after this deep purifying with coke-stove gas through methanation
The technology of liquefied methane, is the important directions for opening up new natural gas resource.
Coke-stove gas liquefied methane device includes compression section, desulfurization workshop section, synthesizing section, liquefaction workshop section.In liquefaction
Workshop section, gas employing methanation of coke oven first passes around precooling after dehydrating, subsequently into each section of heat exchanger in ice chest, quilt
The cryogenic media cooling backflowed, gas, which is cooled to, is changed into the middle part that gas-liquid mixture enters rectifying column after certain temperature, in essence
Evaporate gas in tower to be distillated, isolate hydrogen and nitrogen gas and discharged by tower top, obtain liquid methane in bottom of towe, be subcooled and depressurize through subcooler
After be sent in non-pressurized LNG storage tank store.If C, H are than improper in unstripped gas, carbon dioxide content is higher, will result in drying
Tower is penetrated, it is impossible to effective absorbing carbon dioxide again, and the too high unstripped gas of carbonated enters the relatively low ice chest of temperature, Jiu Huizao
Into carbon dioxide condensing solidification so that ice chest is blocked, even if not blocking ice chest, will also result in product quality has certain fluctuation.
Utility model content
The purpose of this utility model is：The deficiencies in the prior art are overcome to make liquefied natural gas there is provided a kind of coke-stove gas
Device, can further remove the carbon dioxide in unstripped gas, solve liquefaction unit ice chest and block and product quality fluctuation
Larger the problem of, do not influence ice chest normally to run, improve production efficiency, so as to reach social benefit, environmental benefit and warp
Ji benefit.
To reach above-mentioned purpose, the utility model provides a kind of coke-stove gas and makes liquefied natural gas plant, coke-stove gas
Making liquefied natural gas plant includes compression section, desulfurization workshop section, synthesizing section, liquefaction workshop section, and liquefaction workshop section is provided with adjustable
Decarbonization device, adjustable decarbonization device includes absorption tower, desorber, stripper.
Preferably, liquefaction workshop section is provided with ice chest, and adjustable decarbonization device is arranged at before ice chest, and adjustable decarbonization device goes out
Gas port is connected with the air inlet of ice chest, and coke-stove gas is introduced into adjustable decarbonization device before ice chest is entered.
Preferably, the absorbent in absorption tower is the N methyldiethanol amine aqueous solution, and catalyst is diethanol amine.
Preferably, absorption tower includes the first absorption tower, second absorption tower, and second absorption tower is arranged at the upper of the first absorption tower
Portion, the bottom of second absorption tower at the top of the first absorption tower with being connected.
Preferably, desorber includes the first desorber, the second desorber, the liquid outlet on the first absorption tower and the first desorber
Inlet be connected, the liquid outlet of the first desorber is connected with the inlet of the second desorber, and second desorber goes out
Liquid mouthful is connected with the inlet of the first absorption tower, stripper.
Preferably, the liquid outlet of stripper is connected with the inlet of second absorption tower.
Preferably, coke-stove gas, which makes liquefied natural gas plant, also includes fine de-sulfur filter and heating furnace, adjustable decarburization
Device is located on the pipeline between fine de-sulfur filter and heating furnace.
Preferably, adjustable decarbonization device loong shunt has straight-through pipeline, and straight-through pipeline is connected to fine de-sulfur filter and heating
Between stove, control valve is provided with pipeline and on straight-through pipeline where adjustable decarbonization device.
Because above-mentioned technical proposal is used, the present invention has advantages below relative to prior art：
1. solving ice chest to be frequently occluded, the problem of often stopping reduces fault rate, has retrieved economic loss；
2. positive role is played in terms of making up coke-stove gas hydrogen-carbon ratio (R values) and fluctuating frequently shortcoming, so as to buffer
Because the fluctuation of oven gas R values causes the fluctuation of methanation product gas quality, the effect of steady production is served.
3. because carbon dioxide content is adjustable, activity is stronger, unstripped gas can be made full use of, makes maximum production；
4. the absorbent N methyldiethanol amine aqueous solution can also absorb other acid gas impurities, raw material is further purified
Gas.
For above-mentioned and related purpose, one or more embodiments include will be explained in below and in claim
In the feature that particularly points out.Following explanation and accompanying drawing describe some illustrative aspects in detail, and its indicate be only
Some modes in the utilizable various modes of principle of each embodiment.Other benefits and novel features will be under
The detailed description in face is considered in conjunction with the accompanying and becomes obvious, the disclosed embodiments be will include all these aspects and they
Be equal.
Figure of description
Fig. 1 makes the structural representation of liquefied natural gas plant for the coke-stove gas of the utility model embodiment；
Fig. 2 makes the structural representation of the liquefaction workshop section of liquefied natural gas plant for the coke-stove gas of the utility model embodiment
Figure；
Fig. 3 makes the structure of the adjustable decarbonization device of liquefied natural gas plant for the coke-stove gas of the utility model embodiment
Schematic diagram.
Description of reference numerals：1st, compression section；2nd, desulfurization workshop section；3rd, synthesizing section；4th, liquefaction workshop section；5th, adjustable decarburization dress
Put；6th, ice chest；7th, the first absorption tower；8th, second absorption tower；9th, the first desorber；10th, the second desorber；11st, stripper；12、
Fine de-sulfur filter；13rd, heating furnace；14th, pipeline is led directly to；15th, control valve.
Embodiment
The following description and drawings fully show specific embodiment of the present utility model, so that those skilled in the art
Them can be put into practice.Other embodiments can include structure, logic, electric, process and other changes.It is real
Apply example and only represent possible change.Unless explicitly requested, otherwise single components and functionality is optional, and the order operated
It can change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.
The scope of embodiment of the present utility model includes the gamut of claims, and all of claims obtain
Equivalent.Herein, these embodiments of the present utility model can individually or generally be used term " utility model "
To represent, it is convenient that this is used for the purpose of, and if in fact disclosing the utility model more than one, is not meant to automatically limit
It is any single utility model or utility model design to make the scope of the application.
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1 to Figure 3, liquefied natural gas plant, including compression work are made according to coke-stove gas of the present utility model
Section 1, desulfurization workshop section 2, synthesizing section 3, liquefaction workshop section 4, liquefaction workshop section 4 are provided with adjustable decarbonization device 5, adjustable decarbonization device 5
Including absorption tower, desorber, stripper 11.
Liquefaction workshop section 4 is provided with ice chest 6, and adjustable decarbonization device 5 is arranged at before ice chest 6, the outlet of adjustable decarbonization device 5
Mouth is connected with the air inlet of ice chest 6, and coke-stove gas is introduced into adjustable decarbonization device 5 and carries out decarburization before ice chest 6 is entered,
So as to be lowered into the phosphorus content in ice chest 6, effectively prevent that liquefaction unit ice chest from blocking and product quality fluctuation is larger
Problem, does not influence ice chest normally to run, and improves production efficiency, so as to improve social benefit, environmental benefit and economic benefit.
Absorbent in absorption tower is the N methyldiethanol amine aqueous solution, and catalyst is diethanol amine.
Absorption tower includes the first absorption tower 7, second absorption tower 8, and second absorption tower 8 is arranged at the top on the first absorption tower 7,
The bottom of second absorption tower 8 is connected with the top on the first absorption tower 7.
Desorber includes the first desorber 9, the second desorber 10, the liquid outlet on the first absorption tower 7 and the first desorber 9
Inlet is connected, and the liquid outlet of the first desorber 9 is connected with the inlet of the second desorber 10, the second desorber 10
Liquid outlet is connected with the inlet of the first absorption tower 7, stripper 11.
The liquid outlet of stripper 11 is connected with the inlet of second absorption tower 8.
Coke-stove gas, which makes liquefied natural gas plant, also includes fine de-sulfur filter 12 and heating furnace 13, adjustable decarbonization device
5 are located on the pipeline between fine de-sulfur filter 12 and heating furnace 13.
The adjustable loong shunt of decarbonization device 5 has straight-through pipeline 14, and straight-through pipeline 14 is connected to fine de-sulfur filter 12 and heating
Between stove 13, on the adjustable place pipeline of decarbonization device 5 and control valve 15 is provided with straight-through pipeline 14.The straight-through pipeline 14 with
Pipeline where adjustable decarbonization device 5 is selectively connected, can when the phosphorus content of coke-stove gas is relatively low without decarburization at
Reason, accelerates the efficiency that coke-stove gas enters ice chest, accelerates the producing efficiency of liquefied natural gas.It is higher in the phosphorus content of coke-stove gas
And during beyond setting value, straight-through pipeline 14 can be cut off, force coke-stove gas to flow through adjustable decarbonization device 5 and carry out decarburization, so that
Reduce the phosphorus content in coke-stove gas, it is ensured that the normal operation of ice chest.
The adjustable decarbonization process for making the adjustable decarbonization device of liquefied natural gas using above-mentioned coke-stove gas is as follows：
1st, coke-stove gas is introduced by the air inlet on the first absorption tower, is fully contacted with semi lean solution in the first absorption tower, is taken off
After a part of carbon dioxide, into second absorption tower；
2nd, coke-stove gas enters after second absorption tower, is fully contacted with lean solution, after removing residual carbon dioxide, is inhaled through second
Receive tower gas outlet and be expelled to ice chest, complete decarbonizing process；
3rd, lean solution after absorbing carbon dioxide, is changed into semi lean solution in second absorption tower, into the first absorption tower；Semi lean solution exists
In first absorption tower after absorbing carbon dioxide, it is changed into rich solution, is expelled to the first desorber；
4th, rich solution is discharged into the second desorber after being handled through the first desorber, in the second desorber, a rich solution removing part
Carbon dioxide, is changed into semi lean solution, and semi lean solution is delivered to the first absorption tower and stripper；
5th, semi lean solution carbon dioxide removal in stripper, is changed into lean solution and is delivered to second absorption tower, complete absorbent
Circular regeneration process；
Wherein lean solution is not carbonated absorbent, and semi lean solution is a part of carbon dioxide in removing coke-stove gas
Absorbent, rich solution is the absorbent of whole carbon dioxide in removing coke-stove gas.Rich solution is removed after hydrogen in the first desorber,
It is discharged into the second desorber.
Because above-mentioned technical proposal is used, the present invention has advantages below relative to prior art：
1. solving ice chest to be frequently occluded, the problem of often stopping reduces fault rate, has retrieved economic loss；
2. positive role is played in terms of making up coke-stove gas hydrogen-carbon ratio (R values) and fluctuating frequently shortcoming, so as to buffer
Because the fluctuation of oven gas R values causes the fluctuation of methanation product gas quality, the effect of steady production is served.
3. because carbon dioxide content is adjustable, activity is stronger, unstripped gas can be made full use of, makes maximum production；
4. the absorbent N methyldiethanol amine aqueous solution can also absorb other acid gas impurities, raw material is further purified
Gas.
Above-mentioned detailed description is illustrated for the possible embodiments of utility model, and the embodiment is simultaneously not used to limitation
The scope of the claims of the present utility model, it is all without departing from equivalence enforcement of the present utility model or change, it should be contained in this practicality new
In the scope of the claims of type.
In addition, those skilled in the art can also do other shapes in the utility model claim scope of disclosure and spirit
Various modifications, addition and replacement in formula and details.Certainly, these according to the utility model spirit made various modifications, add
Plus and replace etc. change, all should be included in the utility model it is claimed within the scope of.
It should also be appreciated by one skilled in the art that the various illustrative boxes described with reference to the embodiments herein, mould
Block, circuit and algorithm steps can be implemented as electronic hardware, computer software or its combination.In order to clearly demonstrate hardware and
Interchangeability between software, is carried out to various illustrative parts, frame, module, circuit and step around its function above
It is generally described.Hardware is implemented as this function and is also implemented as software, depending on specific application and to whole
The design constraint that system is applied.Those skilled in the art can be directed to each application-specific, be realized in the way of flexible
Described function, it is still, this to realize that decision-making should not be construed as the protection domain away from the disclosure.
Claims (8)
1. a kind of coke-stove gas makes liquefied natural gas plant, the coke-stove gas, which makes liquefied natural gas plant, includes compression work
Section (1), desulfurization workshop section (2), synthesizing section (3), liquefaction workshop section (4), it is characterised in that the liquefaction workshop section (4) is provided with can
Decarbonization device (5) is adjusted, the adjustable decarbonization device (5) includes absorption tower, desorber, stripper (11).
2. coke-stove gas according to claim 1 makes liquefied natural gas plant, it is characterised in that the liquefaction workshop section
(4) ice chest (6) is provided with, the adjustable decarbonization device (5) is arranged at before ice chest (6), adjustable decarbonization device (5) go out
Gas port is connected with the air inlet of the ice chest (6), and coke-stove gas is introduced into adjustable decarbonization device before ice chest (6) is entered
(5)。
3. coke-stove gas according to claim 1 makes liquefied natural gas plant, it is characterised in that in the absorption tower
Absorbent is the N methyldiethanol amine aqueous solution, and catalyst is diethanol amine.
4. coke-stove gas according to claim 3 makes liquefied natural gas plant, it is characterised in that the absorption tower includes
First absorption tower (7), second absorption tower (8), the second absorption tower (8) are arranged at the top of the first absorption tower (7), and second inhales
The bottom of tower (8) is received with being connected at the top of the first absorption tower (7).
5. coke-stove gas according to claim 4 makes liquefied natural gas plant, it is characterised in that the desorber includes
First desorber (9), the second desorber (10), the liquid outlet of first absorption tower (7) and entering for the first desorber (9)
Liquid mouthful is connected, and the liquid outlet of first desorber (9) is connected with the inlet of second desorber (10), and described the
The liquid outlet of two desorbers (10) is connected with the inlet of first absorption tower (7), stripper (11).
6. coke-stove gas according to claim 5 makes liquefied natural gas plant, it is characterised in that the stripper (11)
Liquid outlet be connected with the inlet of the second absorption tower (8).
7. coke-stove gas according to claim 1 makes liquefied natural gas plant, it is characterised in that the coke-stove gas system
Making liquefied natural gas plant also includes fine de-sulfur filter (12) and heating furnace (13), and the adjustable decarbonization device (5) is located at institute
State on the pipeline between fine de-sulfur filter (12) and the heating furnace (13).
8. coke-stove gas according to claim 7 makes liquefied natural gas plant, it is characterised in that the adjustable decarburization dress
Putting (5) loong shunt has a straight-through pipeline (14), the straight-through pipeline (14) be connected to the fine de-sulfur filter (12) and it is described plus
Between hot stove (13), control valve is provided with pipeline and on the straight-through pipeline (14) where the adjustable decarbonization device (5)
(15)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720244028.9U CN206591093U (en) | 2017-03-14 | 2017-03-14 | Coke-stove gas makes liquefied natural gas plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720244028.9U CN206591093U (en) | 2017-03-14 | 2017-03-14 | Coke-stove gas makes liquefied natural gas plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110591781A (en) * | 2019-10-13 | 2019-12-20 | 内蒙古恒坤化工有限公司 | System and method for producing liquefied natural gas by coke oven gas with adjustable decarburization |
-
2017
- 2017-03-14 CN CN201720244028.9U patent/CN206591093U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110591781A (en) * | 2019-10-13 | 2019-12-20 | 内蒙古恒坤化工有限公司 | System and method for producing liquefied natural gas by coke oven gas with adjustable decarburization |
| CN111979005A (en) * | 2019-10-13 | 2020-11-24 | 内蒙古恒坤化工有限公司 | System and method for producing liquefied natural gas by coke oven gas with adjustable decarburization |
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