CN103482570B - Method for desulphurization and liquid removal of recycle hydrogen - Google Patents
Method for desulphurization and liquid removal of recycle hydrogen Download PDFInfo
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- CN103482570B CN103482570B CN201310410280.9A CN201310410280A CN103482570B CN 103482570 B CN103482570 B CN 103482570B CN 201310410280 A CN201310410280 A CN 201310410280A CN 103482570 B CN103482570 B CN 103482570B
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Abstract
The invention provides a method for desulphurization and liquid removal of recycle hydrogen of a hydrodesulphurization device. According to the method, the structures of a desulphurization tower and a recycle hydrogen liquid separation tank are improved, a reducing design is adopted at the tower top of the desulphurization tower, a multilayer defogging net is arranged at the top of the desulphurization tower to ensure that the residence time of gas in the tower can be prolonged, the defogging net can effectively reduce the amount of amine liquid carried by the recycle hydrogen, a cyclone is arranged in the recycle hydrogen liquid separation tank, and a clapboard is arranged at the top and bottom of the recycle hydrogen liquid separation tank respectively to further remove the amine liquid carried by the recycle hydrogen. By adopting the method, the removal rate of the amine liquid in the desulphurized recycle hydrogen can reach 99.9%.
Description
Technical field
The invention belongs to desulphurization of recycle hydrogen technical field, relate to a kind of selective hydrodesulfurization device desulphurization of recycle hydrogen liquid removing method.
Background technology
In recycle hydrogen after hydrogenation reaction process, the multi-phase multi-component mixture often containing compositions such as oil, water, hydrogen sulfide, solids.Therefore, in recycle hydrogen recycling process, must desulfurization, purifying treatment be carried out, otherwise the energy consumption of circulating hydrogen compressor can be had influence on, reduce the purity of hydrogen, shorten work-ing life and the reaction efficiency of catalyzer.
Thionizer Main Function in desulphurization of recycle hydrogen device is the sour gas component (being mainly hydrogen sulfide) removed with basic solvent (lean solution) in gas.The basic solvent (rich solution) absorbing sour gas is delivered in solvent regeneration tower and is desorbed from basic solvent by sour gas, thus makes solvent (lean solution) can return to absorption tower to recycle.Current industrial widely used basic solvent is N methyldiethanol amine (MDEA).
Current thionizer Problems existing has: the MDEA solvent flow through in thionizer makes it have stronger foaming character due to the existence of impurity, and its foaming degree have impact on the hydraulics characteristic on column plate greatly, causes very easily reaching liquid flooding state in tower.
Desulfurization solvent foams, and causes amine liquid to run and damages, will cause a lot of adverse consequences.The disperse phase that recycle hydrogen is carried secretly improves the molecular weight of recycle hydrogen, recycle hydrogen adds the energy consumption of circulating hydrogen compressor after being back to selective hydrodesulfurization device, due to the purity drop of recycle hydrogen, also can cause shorten the work-ing life of catalyzer, reaction efficiency reduce.
Summary of the invention
The present invention seeks to the defect for prior art, thionizer and sulfur method are improved, provide a kind of desulphurization of recycle hydrogen efficiently except liquid technique.
The present invention realizes in the following manner.
Desulphurization of recycle hydrogen tower adopts variable diameter design, and at tower body height about 2/4 ~ 3/4 place, by reducing, tower top diameter is greater than tower body diameter.Tower top installs multilayer demist net, and demist net is the net composition of metal or the single material of chemical fibre, or is made up of the net MULTILAYER COMPOSITE of metal and chemical fibre material.
Technological process is: the isolated recycle hydrogen of catalytic gasoline selective hydrodesulfurizationmodification device enters in thionizer from desulphurization of recycle hydrogen tower bottom and middle part with the poor amine liquid from this device solvent regeneration system respectively, recycle hydrogen gas flows to tower top direction, and poor amine liquid is to the low flowing of tower, in thionizer, recycle hydrogen contacts with poor amine liquid is reverse, hydrogen sulfide in poor amine absorption recycle hydrogen gas, rich amine solution is discharged by bottom thionizer.Because thionizer tower top diameter becomes large, the recycle hydrogen flow velocity arriving tower top is slack-off, and the extended residence time in tower, meanwhile, under the effect of multilayer demist net, the amine liquid that recycle hydrogen is carried secretly is removed.After removing amine liquid, recycle hydrogen is discharged by thionizer tower top outlet, sends into recycle hydrogen and divides flow container to remove amine liquid further.Recycle hydrogen divides in flow container and is provided with swirler, and dividing plate is all equipped with in top and the bottom of tank, plays gas liquid separating function.Recycle hydrogen gas enters in the middle part of point flow container, and enters swirler, realizes gas-liquid separation by centrifugal settling.Tank deck isolates desulfurization except the recycle hydrogen after liquid, and liquid at the bottom of tank enters disused aine liquid tank.
Described desulphurization of recycle hydrogen column overhead adopts variable diameter design, increases the tower diameter of tower top, can reduce overhead gas flow velocity, extends the residence time of gas in tower, improves gas-liquid separation efficiency.
Described thionizer tower top installs multilayer demist net, effectively can remove the amine liquid that recycle hydrogen is carried secretly, greatly can reduce the amine liquid measure that the recycle hydrogen that thionizer is carried secretly.
Described recycle hydrogen divides in flow container and is provided with swirler, dividing plate setting up and down, all plays the effect of gas-liquid separation.In final recycle hydrogen, amine liquid clearance can reach 99.9%.
The present invention is by dividing the improvement of liquid tank structure to thionizer and recycle hydrogen, achieve the object of catalytic gasoline selective hydrodesulfurizationmodification device desulphurization of recycle hydrogen except liquid, solve in desulphurization of recycle hydrogen technological process because solvent foaming causes the gas entrainment problem of separation.The present invention reduces the race damage amount of amine liquid, increase desulphurization circulating hydrogen purity, avoid because the adverse consequences that amine liquid causes carried secretly by recycle hydrogen.
Accompanying drawing explanation
Accompanying drawing 1 is for desulphurization of recycle hydrogen of the present invention is except liquid process flow diagram.
In figure, the meaning of each numbering representative is as follows:
1: recycle hydrogen; 2: poor amine liquid; 3: rich amine solution; 4: desulphurization circulating hydrogen; 5: disused aine liquid; 1-1: desulphurization of recycle hydrogen tower; 1-2: recycle hydrogen divides flow container; 1-11: demist net; 1-12: column plate; 1-13: tower body; 1-21: swirler; 1-22: upper spacer; 1-23: lower clapboard; 1-24: swirler inlet mouth.
Embodiment
Accompanying drawings the specific embodiment of the present invention.
Tower body (1-13), column plate (1-12) and mist eliminator (1-11) is comprised in thionizer (1-1).Thionizer (1-1) adopts variable diameter design, and at tower body height about 2/4 ~ 3/4 place, tower top diameter is greater than tower body diameter.Tower top installs multilayer demist net (1-11).
The isolated recycle hydrogen of catalytic gasoline selective hydrodesulfurizationmodification device (1) and the poor amine liquid (2) from this device solvent regeneration system enter in tower from desulphurization of recycle hydrogen tower (1-1) bottom and middle part respectively, recycle hydrogen and poor amine liquid counter current contact, the hydrogen sulfide in recycle hydrogen (1) is absorbed by poor amine liquid (2).Poor amine liquid after absorbing hydrogen sulphide is rich amine solution (3), discharges from thionizer (1-1) end.The recycle hydrogen of tower top, because tower top diameter increases, recycle hydrogen gas at the extended residence time of tower top, then through the amine liquid of multilayer demist net (1-11) except deentrainment, is then sent into recycle hydrogen and is divided flow container (1-2) to continue removing amine liquid.
Recycle hydrogen divides flow container (1-2) an in-built swirler (1-21), entering recycle hydrogen divides the gas of flow container (1-2) to enter in swirler (1-21) by the inlet mouth (1-24) at swirler (1-21) top, by centrifugal settling effect, reach the object except liquid.Recycle hydrogen divides flow container (1-2) to install dividing plate (1-22) and lower clapboard (1-23), also plays certain gas liquid separating function.Tank deck isolates desulfurization except the recycle hydrogen (4) after liquid, discharges disused aine liquid (5) at the bottom of tank.
Desulfurization can reach 99.9% except the recycle hydrogen amine liquid clearance after liquid, sends hydrodesulfurization unit back to and mixes with new hydrogen, be back in hydrodesulfurization.
Claims (3)
1. a desulphurization of recycle hydrogen liquid removing method, key step is: the isolated recycle hydrogen of catalytic gasoline selective hydrodesulfurizationmodification device enters in tower from desulphurization of recycle hydrogen tower bottom and middle part with the poor amine liquid from solvent regeneration system respectively, under the effect of column plate and multilayer demist net, tower top separates desulphurization circulating hydrogen, rich amine solution is separated at the bottom of tower, desulphurization circulating hydrogen is sent into recycle hydrogen again and is divided flow container to remove the amine liquid carried secretly, disused aine liquid is discharged by the bottom of tank, recycle hydrogen is discharged from tank deck, is back to catalytic gasoline selective hydrodesulfurizationmodification device; It is characterized in that described a kind of desulphurization of recycle hydrogen liquid removing method comprises tower body, column plate, demist net, tower body top adopts variable diameter design, and demist net is arranged on thionizer top; It is characterized in that adopting variable diameter design position to be positioned at high 2/4 ~ 3/4 place of tower body, tower top diameter is greater than tower body diameter.
2. a kind of desulphurization of recycle hydrogen liquid removing method as claimed in claim 1, is characterized in that demist net is made up of the net of multiple layer metal or the single material of chemical fibre, or is made up of the net MULTILAYER COMPOSITE of metal and chemical fibre material.
3. a kind of desulphurization of recycle hydrogen liquid removing method as claimed in claim 1, is characterized in that recycle hydrogen divides flow container built-in swirler, and dividing plate is all equipped with in point flow container top and bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310410280.9A CN103482570B (en) | 2013-09-11 | 2013-09-11 | Method for desulphurization and liquid removal of recycle hydrogen |
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| CN201310410280.9A CN103482570B (en) | 2013-09-11 | 2013-09-11 | Method for desulphurization and liquid removal of recycle hydrogen |
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| CN103482570A CN103482570A (en) | 2014-01-01 |
| CN103482570B true CN103482570B (en) | 2015-04-01 |
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| CN103865567B (en) * | 2014-03-20 | 2016-04-06 | 长岭炼化岳阳工程设计有限公司 | Desulphurization of recycle hydrogen system and method |
| CN108043332A (en) * | 2018-01-17 | 2018-05-18 | 北京国能中林科技开发有限公司 | A kind of efficient dehydrogenation reactor applied to liquid hydrogen source material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101455933A (en) * | 2008-10-24 | 2009-06-17 | 上海华畅环保设备发展有限公司 | Tower-top eddy flow purification method and device of recycle hydrogen desulfurizing tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101455933A (en) * | 2008-10-24 | 2009-06-17 | 上海华畅环保设备发展有限公司 | Tower-top eddy flow purification method and device of recycle hydrogen desulfurizing tower |
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