CN205710634U - A kind of decarbonization desulfurization system of synthetic natural gas - Google Patents
A kind of decarbonization desulfurization system of synthetic natural gas Download PDFInfo
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- CN205710634U CN205710634U CN201620389925.4U CN201620389925U CN205710634U CN 205710634 U CN205710634 U CN 205710634U CN 201620389925 U CN201620389925 U CN 201620389925U CN 205710634 U CN205710634 U CN 205710634U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The utility model discloses the decarbonization desulfurization system of a kind of synthetic natural gas, including: natural filtration unit, compression unit, converter unit, organic sulfur hydrogenation unit, desulfurization and decarburization unit, fine de-sulfur unit and methane synthesis unit, these unit are sequentially connected according to the flow direction of described synthetic natural gas.Transformationreation is shifted to an earlier date by this utility model, utilizes MDEA solution can remove H simultaneously2S and CO2Character, multistep desulfurization, decarbonization process are merged into a step, shorten technological process, reduce the cost of desulfurization equipment；Avoid the use of multiple desulfurizing agent.After organic sulfur hydrogenation, the sulfur content in gained synthesis gas is higher, uses the inefficient of dry-desulphurizer, and is not easy to reclaim and recycling.This utility model use MDEA can simultaneously desulfurization and decarburization, and efficiency is higher, greatly reduces desulfurization and decarburization cost.After organic sulfur hydrogenation, the heat in gained hot synthesis gas can be reclaimed by boiler and produce steam, for transformationreation, improves efficiency of utilization.
Description
Technical field
This utility model belongs to chemical technology field, relates to the comprehensive utilization of a kind of pyrolysis gas and calcium carbide furnace gas
Device, particularly relates to a kind of be mixed with the desulfurization of synthetic natural gas by coal pyrolysis gas and calcium carbide furnace gas and take off
Carbon system.
Background technology
The sub-prime cascade utilization of coal is to improve coal utilization efficiency, it is achieved the effective measures of energy-saving and emission-reduction, mesh
Before usual pyrolysis gas by pyrolysis unit pyrolysis gas out through Oil-gas Separation, desulfurization, deamination, de-
The purification pyrolysis gas of gained after the techniques such as benzene.During mixing, rate and inorganic sulphur content in pyrolysis gas and calcium carbide furnace gas
About 50mg/Nm3And part organic sulfur.In follow-up desulfurization and decarburization flow process, inorganic sulfur first passes through wet
The thick desulfurization of method, is then carried out organic sulfur after at 300-400 DEG C, hydrogenated reaction is converted into inorganic sulfur again
Removing.After being hydrogenated with in view of organic sulfur, gained mixture temperature is higher, and this flow process is in follow-up employing dry method
Desulfurization, afterwards a portion gaseous mixture generation steam transformationreation, and use MDEA method to remove
A large amount of CO that converter unit produces2, obtain rich H2Gas.This part hydrogen-rich gas with the most transformed instead
The rich CO gaseous mixture 2 answered mixes, by a certain percentage as methanation unstripped gas after further fine de-sulfur
Preparation synthetic natural gas.
But this flow process to there is shortcoming as follows:
(1) this technological process is comparatively laborious.Compression gaseous mixture first passes through wet method and carries out thick desulfurization, then
Dry desulfurization is carried out again, finally by carrying out CO conversion after fine de-sulfur after organic sulfur is carried out hydrogenation reaction
Reaction, and use a large amount of CO of MDEA method removing CO converter unit generation2.Including three
Desulfurization unit and a decarburization unit.
(2) the desulfurization and decarburization agent selected is more complicated.Desulfurization, decarbonizing solution are respectively alkaline aqueous solution,
Dry-desulphurizer, desulfurizing agent and MDEA decarburizer.Wherein, dry-desulphurizer is to sulfur under high temperature
The adsorption capacity changing hydrogen is limited, and is not easily recycled and reuses.
(3) heat utilization ratio is low.CO transformationreation is carried out at relatively high temperatures, the conjunction that reaction obtains
Become gas need to reduce the temperature to room temperature when with MDEA method decarburization, cause thermal loss.
Utility model content
For the problems of the prior art, the purpose of this utility model be to provide a kind of technological process short,
The decarbonization desulfurization system of the synthetic natural gas that efficiency is high.
For realizing above-mentioned purpose of the present utility model, the desulfurization of the synthetic natural gas that the utility model proposes
Decarbonization system includes: natural filtration unit, compression unit, converter unit, organic sulfur hydrogenation unit,
Desulfurization and decarburization unit, fine de-sulfur unit and methane synthesis unit, these unit are according to coal pyrolysis gas and electricity
Stone furnace gas is mixed with the flow direction of the described synthetic natural gas obtained, from described natural filtration unit
Start, successively natural filtration unit, compression unit, converter unit, organic sulfur are hydrogenated with by pipeline
Unit, desulfurization and decarburization unit, fine de-sulfur unit and methane synthesis unit order are connected.
Further, in the decarbonization desulfurization system of described synthetic natural gas, going out of described compression unit
QI KOU also air inlet with described organic sulfur hydrogenation unit is connected.
Further, in the decarbonization desulfurization system of described synthetic natural gas, described organic sulfur hydrogenation is single
The gas outlet of unit is also connected with the air inlet of heat reclamation device, the gas outlet of described heat reclamation device and institute
The air inlet stating converter unit is connected, and described heat reclamation device includes steam boiler.
Further, in the decarbonization desulfurization system of described synthetic natural gas, described natural filtration unit
Including normal atmosphere filter.
Further, in the decarbonization desulfurization system of described synthetic natural gas, described natural filtration unit
Turnover unstripped gas pipeline on quick action emergency valve is set, the inlet pipeline of described pyrolysis gas is arranged and puts
Dissipating pipeline, described diffuse channel connects torch assembly.
Further, in the decarbonization desulfurization system of described synthetic natural gas, described compression unit includes
Reciprocating compressor.
Further, in the decarbonization desulfurization system of described synthetic natural gas, described converter unit is
CO and steam react generation H2And CO2Change furnace；Described change furnace be provided with gaseous mixture entrance,
Steam entry and rich H2Mixed gas outlet；Wherein, described gaseous mixture entrance and described compression unit
Outlet conduit is connected, and described steam entry connects with the outlet of the described heat reclamation device producing steam
Connect, described rich H2Mixed gas outlet is connected with the entrance of described organic sulfur hydrogenation unit.
Further, in the decarbonization desulfurization system of described synthetic natural gas, described organic sulfur hydrogenation is single
Unit (d) is hydro-conversion device；Described hydro-conversion device is provided with rich H2Gaseous mixture entrance, the most transformed
Rich CO gaseous mixture entrance and the gaseous mixture 3 of reaction export.
Further, in the decarbonization desulfurization system of described synthetic natural gas, described desulfurization and decarburization unit
E () includes MDEA desulfurization and decarburization tower；Described MDEA desulfurization and decarburization tower includes absorption tower, parsing
Tower and cryogenic separation device；Wherein said absorption tower is provided with unstripped gas entrance, unstripped gas exports,
The outlet of MDEA rich solution and MDEA lean solution entrance；Wherein, described unstripped gas entrance and described organic sulfur
The outlet of hydrogenation unit (d) is connected, the outlet of described unstripped gas and the entrance of described fine de-sulfur unit (f)
It is connected；Described Analytic Tower is provided with MDEA rich solution entrance, the outlet of MDEA lean solution and gas outlet；Its
In, the gas outlet of described Analytic Tower is connected with described cryogenic separation device；Described cryogenic separation device
Outlet connect CO respectively2And H2S storage tank.
Further, in the decarbonization desulfurization system of described synthetic natural gas, described fine de-sulfur unit (f)
Including zinc oxide desulfurization groove.
Compared with background technology, transformationreation is shifted to an earlier date by this utility model, utilizes the MDEA solution can be with
Time removing H2S and CO2Character, multistep desulfurization, decarbonization process are merged into a step, shorten work
Process flow, reduces the cost of desulfurization equipment；Avoid the use of multiple desulfurizing agent, especially organic sulfur
After hydrogenation, the sulfur content in gained synthesis gas is higher, uses the inefficient of dry-desulphurizer, and does not allows
Easily reclaim and recycling.This utility model use MDEA can simultaneously desulfurization and decarburization, and efficiency is higher,
Greatly reduce desulfurization and decarburization cost.It is important that the heat in gained hot synthesis gas after organic sulfur hydrogenation
Can be reclaimed by boiler and produce steam, for transformationreation, improve efficiency of utilization.
Accompanying drawing explanation
Fig. 1 is the structural representation of the decarbonization desulfurization system of synthetic natural gas of the present utility model.
Detailed description of the invention
Illustrated embodiment illustrates the desulfurization of synthetic natural gas of the present utility model below in conjunction with the accompanying drawings
The structure of decarbonization system.
As it is shown in figure 1, according to an embodiment of the present utility model, it is proposed that a kind of synthetic natural gas
Decarbonization desulfurization system, comprising: natural filtration unit, compression unit, converter unit, organic sulfur
Hydrogenation unit, desulfurization and decarburization unit, fine de-sulfur unit and methane synthesis unit.
As it is shown in figure 1, in the decarbonization desulfurization system of synthetic natural gas of the present utility model, described pyrolysis
Gas refers to by pyrolysis unit pyrolysis gas out after the techniques such as Oil-gas Separation, desulfurization, deamination, de-benzene
The purification pyrolysis gas of gained.During mixing, rate and inorganic sulphur content about 50mg/Nm in pyrolysis gas and calcium carbide furnace gas3
And part organic sulfur.
Such as Fig. 1, described pyrolysis gas and calcium carbide furnace gas respectively enter natural filtration unit, the most successively warp
Overcompression unit, converter unit, organic sulfur hydrogenation unit, desulfurization and decarburization unit, fine de-sulfur unit and
Methane synthesis unit.
Described natural filtration unit is primarily referred to as normal atmosphere filter.Owing to unstripped gas is inflammable and explosive Class A
Hazardous gas, preferably arranges quick action emergency valve, at pyrolysis gas on the unstripped gas pipeline of turnover native system
Arranging diffuse channel on inlet pipeline, this diffuse channel can connect torch assembly and carry out necessary burning.
Such as Fig. 1, described compression unit can be reciprocating compressor, it is therefore an objective to defeated after being pressurizeed by unstripped gas
Send.The outlet of described reciprocating compressor can connect two-way pipeline, i.e. can respectively with converter unit and
Organic sulfur hydrogenation unit connects.
Described converter unit refers to that CO and steam react generation H2And CO2Change furnace.This change
Change stove and be provided with gaseous mixture 1 entrance, steam entry and rich H2Mixed gas outlet, wherein gaseous mixture 1 enters
Mouth is connected with the outlet conduit of compression unit, steam entry and the waste heat boiler outlet producing steam
Connect, rich H2Mixed gas outlet is connected with the entrance of organic sulfur hydrogenation plant.
Described organic sulfur hydrogenation unit can be hydro-conversion device.It is provided with rich H2Gaseous mixture entrance,
Rich CO gaseous mixture 2 entrance and gaseous mixture 3 without transformationreation export.In the apparatus, gaseous mixture
In organic sulfur in hydro-conversion device, be converted into inorganic sulfur, gaseous mixture 3 is returned by waste heat boiler afterwards
Desulfurization and decarburization unit is entered after receiving heat.After wherein waste heat boiler absorbs the heat of unstripped gas, produce water
Steam, is connected with the steam entry of converter unit.
Described desulfurization and decarburization unit refers to MDEA desulfurization and decarburization tower, mainly includes absorption tower, parsing
Tower and cryogenic separation device.MDEA absorption tower is provided with unstripped gas entrance, unstripped gas outlet, MDEA
Rich solution outlet and MDEA lean solution entrance.Wherein, unstripped gas entrance and the outlet of organic sulfur hydrogenation unit
Being connected, unstripped gas, behind described absorption tower, is entered fine de-sulfur unit entrance by unstripped gas outlet；Absorb
Complete CO2And H2The rich MDEA liquid of S, is entered Analytic Tower regeneration MDEA by the outlet of MDEA rich solution
Solution, the MDEA lean solution after regeneration is reused to absorption tower by MDEA lean solution inlet return；Solve
Analysis tower is provided with MDEA rich solution entrance, the outlet of MDEA lean solution and gas outlet.Wherein, Analytic Tower
Gas outlet is connected with cryogenic separation device, and cryogenic separation device outlet connects CO respectively2And H2S stores up
Tank.
Described fine de-sulfur unit is to ensure that methanation reaction, to the sulfur content requirement in unstripped gas, is adopted
Remove hydrogen sulfide therein with zinc oxide desulfurization groove, make the total sulfur content in gas less than 0.1ppm.By
Zinc oxide desulfurization groove out after high-temperature gas be sent to methane synthesis unit, react.
Embodiment 1
System provided by the utility model, its working method is as follows:
(1) pyrolysis of coal gained pyrolysis gas is after desulfurization, the de-gas purification unit such as benzene, deamination, with furnace of calcium carbide
Edema caused by disorder of QI is not pressurizeed by blower fan, respectively enters normal atmosphere filter, filters off tar therein and naphthalene etc.
Impurity；
(2) gaseous mixture after filtering via described normal atmosphere filter enters twin compressor (compression unit) and enters
Row pressurization, is divided into two strands, i.e. gaseous mixture 1 and gaseous mixture 2 after sending；
(3) gaseous mixture 1 carries out organic sulfur hydrogenation after water-gas shift, and outlet gaseous mixture 1 passes through steam boiler,
Produce steam, be transported to steam converter unit and react, make gaseous mixture 1 complete to change simultaneously
Heat；
(4) gaseous mixture 1 after cooling is single at described organic sulfur hydrogenation with the gaseous mixture 2 without transformationreation
Mixing in unit, (dry method takes off to sequentially pass through MDEA desulfurization and decarburization unit and fine de-sulfur unit afterwards
Sulfur), the gaseous mixture main component after desulfurization and decarburization is CO and H2, and H2/ CO ratio is adjustable；
(5) MDEA desulfurization and decarburization tower has absorbed H2S and CO2Rich MDEA liquid, enter gas Analytic Tower regeneration
MDEA solution, it is thus achieved that H2S and CO2Mixed gas obtains H after cryogenic separator separates2S
And CO2, send into storage tank and store.
(6) the methanation unstripped gas obtained through desulfurization and decarburization, preheated rear entrance in methane synthesis unit is carried out
Reaction, finally prepares SNG.
The most visible, pyrolysis gas and calcium carbide furnace gas can be comprehensively utilized by this utility model, system
Standby synthetic natural gas or liquefied natural gas.So, it is possible not only to improve further the economy of integrated artistic
Property, it is also possible to reduce the discharge of environmental pollution gas, be the important step realizing energy-saving and emission-reduction.This technique
Key problem in technology point be that pyrolysis gas and calcium carbide furnace gas are carried out transformationreation, and use rational method to enter
Row desulfurization and decarburization, makes the sulfur in synthesis gas, carbon content reach to prepare the requirement of synthetic natural gas.This reality
Technological process can not only be greatly shortened by the system of novel proposition, reduce desulfurization and decarburization device, also avoid
The use of multiple desulfurizing agent, the especially use of dry-desulphurizer under high temperature, significantly reduce desulfurization and take off
Carbon cost.It is also important that, after organic sulfur hydrogenation, the high-temperature synthesis gas of gained can first pass through heating kettle
Stove, completes heat recovery, and obtains the steam needed for transformationreation, improves systematic heat utilization effect
Rate.
It should be noted that the embodiment above by reference to described by accompanying drawing is only in order to illustrate this utility model
And unrestricted scope of the present utility model.It will be understood by those within the art that, without departing from
The amendment or the equivalent that on the premise of spirit and scope of the present utility model carry out this utility model are replaced
Change, all should contain within the scope of this utility model.Additionally, unless the context outside indication, with
The word that singulative occurs includes plural form, and vice versa.
Claims (10)
1. the decarbonization desulfurization system of a synthetic natural gas, including: natural filtration unit, compression unit, converter unit, organic sulfur hydrogenation unit, desulfurization and decarburization unit, fine de-sulfur unit and methane synthesis unit, it is characterized in that: be mixed with the flow direction of the described synthetic natural gas obtained according to coal pyrolysis gas and calcium carbide furnace gas, from the beginning of described natural filtration unit, by pipeline successively by described natural filtration unit, described compression unit, described converter unit, described organic sulfur hydrogenation unit, described desulfurization and decarburization unit, described fine de-sulfur unit and described methane synthesis unit order are connected.
The decarbonization desulfurization system of synthetic natural gas the most according to claim 1, it is characterised in that the gas outlet of described compression unit also air inlet with described organic sulfur hydrogenation unit is connected.
The decarbonization desulfurization system of synthetic natural gas the most according to claim 1 and 2, it is characterized in that, the gas outlet of described organic sulfur hydrogenation unit is also connected with the air inlet of heat reclamation device, the gas outlet of described heat reclamation device is connected with the air inlet of described converter unit, and described heat reclamation device includes steam boiler.
The decarbonization desulfurization system of synthetic natural gas the most according to claim 1 and 2, it is characterised in that described natural filtration unit includes normal atmosphere filter.
The decarbonization desulfurization system of synthetic natural gas the most according to claim 4, it is characterized in that, arranging quick action emergency valve on the turnover unstripped gas pipeline of described natural filtration unit, arrange diffuse channel on the inlet pipeline of described coal pyrolysis gas, described diffuse channel connects torch assembly.
The decarbonization desulfurization system of synthetic natural gas the most according to claim 1 and 2, it is characterised in that described compression unit includes reciprocating compressor.
The decarbonization desulfurization system of synthetic natural gas the most according to claim 3, it is characterised in that described converter unit is that CO reacts generation H with steam2And CO2Change furnace；
Described change furnace is provided with gaseous mixture entrance, steam entry and rich H2Mixed gas outlet；
Wherein, described gaseous mixture entrance is connected with the outlet conduit of described compression unit, and described steam entry is connected with the outlet of the described heat reclamation device producing steam, described rich H2Mixed gas outlet is connected with the entrance of described organic sulfur hydrogenation unit.
The decarbonization desulfurization system of synthetic natural gas the most according to claim 1 and 2, it is characterised in that described organic sulfur hydrogenation unit is hydro-conversion device；
Described hydro-conversion device is provided with rich H2Gaseous mixture entrance, without rich CO gaseous mixture entrance and the 3rd mixed gas outlet of transformationreation.
The decarbonization desulfurization system of synthetic natural gas the most according to claim 1 and 2, it is characterised in that described desulfurization and decarburization unit includes MDEA desulfurization and decarburization tower；
Described MDEA desulfurization and decarburization tower includes absorption tower, Analytic Tower and cryogenic separation device；
Wherein said absorption tower is provided with unstripped gas entrance, unstripped gas outlet, the outlet of MDEA rich solution and MDEA lean solution entrance；Wherein, described unstripped gas entrance is connected with the outlet of described organic sulfur hydrogenation unit, and the outlet of described unstripped gas is connected with the entrance of described fine de-sulfur unit；
Described Analytic Tower is provided with MDEA rich solution entrance, the outlet of MDEA lean solution and gas outlet；Wherein, the gas outlet of described Analytic Tower is connected with cryogenic separation device；
The outlet of described cryogenic separation device connects CO respectively2And H2S storage tank.
The decarbonization desulfurization system of synthetic natural gas the most according to claim 1 and 2, it is characterised in that described fine de-sulfur unit includes zinc oxide desulfurization groove.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997196A (en) * | 2017-04-14 | 2017-08-01 | 长江大学 | MDEA decarbonization system analysis methods based on gray relative analysis method |
| CN112892146A (en) * | 2021-01-26 | 2021-06-04 | 凯盛光伏材料有限公司 | Method and system for separating hydrogen sulfide from industrial tail gas |
| CN114540089A (en) * | 2022-03-03 | 2022-05-27 | 北京盖雅环境科技有限公司 | Natural gas desulfurization and decarbonization agent and using method thereof |
-
2016
- 2016-04-29 CN CN201620389925.4U patent/CN205710634U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997196A (en) * | 2017-04-14 | 2017-08-01 | 长江大学 | MDEA decarbonization system analysis methods based on gray relative analysis method |
| CN112892146A (en) * | 2021-01-26 | 2021-06-04 | 凯盛光伏材料有限公司 | Method and system for separating hydrogen sulfide from industrial tail gas |
| CN114540089A (en) * | 2022-03-03 | 2022-05-27 | 北京盖雅环境科技有限公司 | Natural gas desulfurization and decarbonization agent and using method thereof |
| CN114540089B (en) * | 2022-03-03 | 2023-09-29 | 北京盖雅环境科技有限公司 | Natural gas desulfurization decarbonization agent and use method thereof |
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