CN220867237U - Amine liquid purifying system - Google Patents
Amine liquid purifying system Download PDFInfo
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- CN220867237U CN220867237U CN202322575399.3U CN202322575399U CN220867237U CN 220867237 U CN220867237 U CN 220867237U CN 202322575399 U CN202322575399 U CN 202322575399U CN 220867237 U CN220867237 U CN 220867237U
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- 239000007788 liquid Substances 0.000 title claims abstract description 77
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- 238000001914 filtration Methods 0.000 claims abstract description 70
- 239000012535 impurity Substances 0.000 claims abstract description 48
- 238000000909 electrodialysis Methods 0.000 claims abstract description 31
- 238000010612 desalination reaction Methods 0.000 claims abstract description 24
- 239000003014 ion exchange membrane Substances 0.000 claims abstract description 19
- 238000000746 purification Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000011033 desalting Methods 0.000 claims abstract description 10
- 230000005684 electric field Effects 0.000 claims abstract description 9
- 238000000502 dialysis Methods 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 25
- 239000013505 freshwater Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000012528 membrane Substances 0.000 claims description 13
- 239000003011 anion exchange membrane Substances 0.000 claims description 12
- 238000005341 cation exchange Methods 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 abstract description 14
- 238000006477 desulfuration reaction Methods 0.000 abstract description 13
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- 238000000034 method Methods 0.000 abstract description 8
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- 230000009471 action Effects 0.000 abstract description 6
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- 230000007646 directional migration Effects 0.000 abstract description 3
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- 150000001450 anions Chemical class 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- 150000001768 cations Chemical class 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229920002678 cellulose Polymers 0.000 description 6
- 239000001913 cellulose Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000012065 filter cake Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000011010 flushing procedure Methods 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
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- 238000001179 sorption measurement Methods 0.000 description 4
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- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000005262 decarbonization Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
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- 229920005989 resin Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- -1 alcohol amine salt Chemical class 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
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- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 241000931197 Themeda Species 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
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- 239000011538 cleaning material Substances 0.000 description 1
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- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The utility model discloses an amine liquid purification system, and belongs to the technical field of amine liquid purification. The utility model comprises an impurity removing unit and a desalting unit, wherein the impurity removing unit is provided with a filtering system, and the filtering system comprises a filtering medium and a precoat layer containing a precoat material; the desalination unit is provided with an electrodialysis system, and the electrodialysis system comprises electrodes for providing a direct current electric field, an ion exchange membrane and a conveying unit for providing dialysis liquid for the electrodialysis system. According to the utility model, impurities and heat stable salts carried in the amine liquid in the desulfurization process are removed through the impurity removing unit and the desalting unit, the high-precision filtration of the amine liquid is realized through the filtering medium and the precoat layer by the filtering system, the amine liquid enters the desalting unit after the impurities are removed through the impurity removing unit, the ion directional migration is realized by utilizing the selective permeability of the ion exchange membrane under the action of a direct current electric field, finally, the heat stable salts in the amine liquid are removed, and the high-efficiency stable operation of the amine liquid desulfurization system is ensured.
Description
Technical Field
The utility model belongs to the technical field of amine liquid purification, and particularly relates to an amine liquid purification system.
Background
Amine liquid-N-Methyldiethanolamine (MDEA) has reversible absorption and regeneration properties for acid gases such as hydrogen sulfide, carbon dioxide, a small amount of carbonyl sulfide (COS) and the like, and has wide application in the aspects of gas desulfurization and decarbonization in the fields of petroleum, chemical industry, natural gas and the like. The solvent converted into the alcohol amine salt is heated to release gases such as H 2 S, CO 2 and the like for regeneration and then is returned to the absorption tower for recycling. In the process of desulfurizing amine liquid, H 2 S and CO 2 are absorbed, and meanwhile, the amine liquid reacts with other substances existing in the system or is combined with entrained solid impurities, including substances such as heat stable salt, sulfide, scrap iron and the like, so that the problems of foaming, scaling and the like are easily caused; the heat stable salt does not have the capability of absorbing acid gas, and can also cause corrosion to equipment, the desulfurization efficiency is reduced, and serious consequences of equipment damage are caused, so that the amine liquid needs to be purified.
The solid pollutants in the amine liquid mainly originate from impurities carried by raw gas, rust and pipeline shedding matters, impurities in make-up water, leakage of active carbon powder and impurities caused by improper material selection of a solid particle filter. In order to ensure the purification effect of the amine liquid, solid particles and hydrocarbon substances in the amine liquid must be filtered. Under the conventional condition, the amine liquid is required to be purified to remove suspended matters, mechanical impurities and other impurities, oil matters and heat stable salts, and at present, three-stage filtering equipment is usually arranged on lean liquid to filter the solution, but a large amount of amine liquid can be taken away when the filtering element is replaced, and the filter is seriously blocked, so that the labor intensity of operators is increased, the equipment operation life is short, the consumable is serious, and the maintenance cost is high. And the resin desalting technology used in the prior art has the characteristics of low exchange capacity, large wastewater discharge, large amine liquid loss, high operation cost and the like.
Disclosure of utility model
The application provides an amine liquid purifying system aiming at the technical problems in the prior art.
In order to solve the technical problems, the utility model comprises an impurity removing unit and a desalting unit, wherein the impurity removing unit is provided with a filtering system, and the filtering system comprises a filtering medium and a precoating layer containing a precoating material; the desalination unit is provided with an electrodialysis system, and the electrodialysis system comprises electrodes for providing a direct current electric field, an ion exchange membrane and a conveying unit for providing dialysis liquid for the electrodialysis system.
Preferably, the filter device further comprises an oil removing system, and the oil removing system is connected with the filter system.
Preferably, the impurity removing unit adopts a double precoating filtration system, the precoating is respectively used for removing suspended matters and organic impurities, and the impurity removing unit and the desalting unit are connected with each other through connecting pipelines.
Preferably, the precoat layer includes a first precoat layer disposed on the filter media and a second precoat layer disposed on the first precoat layer.
Preferably, the first precoat layer is made of a fiber deep filter material, and the second precoat layer is made of an activated carbon filter material.
Preferably, the filtration system comprises a vertical vane filter, the filter media being filter vanes disposed on the filter.
Preferably, the electrode comprises an anode and a cathode, and a fresh water chamber and a concentrated water chamber which are arranged in a staggered way are arranged between the anode and the cathode.
Preferably, the fresh water chamber is connected with the filtering system, and the concentrated water chamber is connected with the conveying unit.
Preferably, the ion exchange membrane comprises a cation exchange membrane and an anion exchange membrane, and the cation exchange membrane and the anion exchange membrane are alternately arranged between the anode and the cathode, respectively.
Preferably, the cation exchange membrane and the anion exchange membrane are respectively arranged at two sides of the fresh water chamber, and the fresh water chamber is connected with the concentrated water chamber through the ion exchange membrane.
Compared with the prior art, the utility model has the following beneficial effects:
According to the utility model, impurities and heat stable salts carried in the amine liquid in the desulfurization process are removed through the impurity removing unit and the desalting unit, the high-precision filtration of the amine liquid is realized through the filtering medium and the precoat layer by the filtering system, the amine liquid enters the desalting unit after the impurities are removed through the impurity removing unit, the ion directional migration is realized by utilizing the selective permeability of the ion exchange membrane under the action of a direct current electric field, finally, the heat stable salts in the amine liquid are removed, and the high-efficiency stable operation of the amine liquid desulfurization system is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an amine liquid purification process flow of the present utility model;
FIG. 2 is a schematic diagram of the principle structure of the desalination unit of the present utility model;
FIG. 3 is a schematic view of a filter according to the present utility model;
FIG. 4 is a schematic diagram of a filtration system of the present utility model;
FIG. 5 is a schematic view of the structure of a filter vane and precoat layer of the present utility model;
FIG. 6 is a schematic diagram of a precoating filtration apparatus of the present utility model;
FIG. 7 is a schematic diagram of the electrodialysis system of the utility model;
FIG. 8 is a schematic diagram of an ion exchange membrane arrangement of an electrodialysis system according to the utility model.
The symbol marks in the figures illustrate:
1. An impurity removal unit; 2. a desalination unit; 3. an electrodialysis system; 31. a fresh water chamber; 32. a concentrated water chamber; 33. a cation exchange membrane; 34. an anion exchange membrane; 4. a filter; 41. a filter blade; 42. a filter housing; 43. a liquid collecting pipe outlet; 44. a sprayer assembly; 45. an oscillator assembly; 51. a first precoat layer; 52. a second precoat layer; 61. an anode; 62. a cathode; 7. a polar water tank; 8. a first precoating tank; 9. a second precoating tank; 10. a first pre-coat pump; 11. a second pre-coat pump.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Referring to fig. 1 and 2, the present utility model provides an amine liquid purification system, which comprises an impurity removal unit 1 and a desalination unit 2, wherein the impurity removal unit 1 is provided with a filtration system, and the filtration system comprises a filtration medium and a precoat layer containing a precoat material; the desalination unit 2 is provided with an electrodialysis system 3, the electrodialysis system 3 comprising electrodes providing a direct current electric field, ion exchange membranes and a transport unit providing a dialysis fluid to the electrodialysis system 3.
According to the utility model, impurities and heat stable salts carried in the amine liquid in the desulfurization process are removed through the impurity removal unit 1 and the desalination unit 2, the high-precision filtration of the amine liquid is realized through the filtration medium and the precoat layer by the filtration system, the amine liquid enters the desalination unit 2 after the impurities are removed through the impurity removal unit 1, the ion directional migration is realized by utilizing the selective permeability of the ion exchange membrane under the action of a direct current electric field, finally, the heat stable salts in the amine liquid are removed, and the high-efficiency and stable operation of the amine liquid desulfurization system is ensured.
Specifically, as shown in fig. 3, the filtering system of the present utility model adopts a precoating filtering mode, the filtering system is provided with a filter 4, a precoating layer is first precoated on the filter blade 41, the liquid medium of the material to be filtered penetrates through the precoating layer, and the precoating layer intercepts solid particles, so that the filtering of the filter 4 is completed, and the precoating filtering mode has high filtering precision and good filtering effect.
Further, in the present embodiment, the filter 4 is a vertical vane filter, and the filter 4 includes a filter housing 42 and a plurality of sets of filter vanes 41 disposed in the filter housing 42, and the filter medium is the filter vanes 41 disposed on the filter; the filter blades 41 are vertically arranged, the lower ends of the filter blades 41 are connected with the liquid collecting pipe outlet 43, and stainless steel filter screens are arranged on the filter blades 41 and are used for supporting and adhering filter aids.
The filtration system further comprises a precoating tank which is in fit connection with the filter 4, and the filter aid is pumped into the filter by a precoating pump after being mixed with the cleaning material in the precoating tank, thereby forming a precoating layer on the stainless steel filter screen of the filter blade 41, and performing precoating filtration.
Still further, the filter 4 further includes a sprayer assembly 44 and an oscillator assembly 45, where the sprayer assembly 44 and the oscillator assembly 45 are both disposed in the filter housing 42, and after the pre-coating filtration of the filter is completed, the filter cake formed after the filtration is dried by nitrogen, the oscillator assembly 45 is turned on to apply high-frequency low-amplitude vibration impact to the filter blades 41, so that the filter cake attached to the blades can be vibrated and discharged out of the filter. The sprayer assembly 44 and the oscillator assembly 45 facilitate cleaning and flushing of the filter 4, solve the problem that the conventional amine liquid filter needs frequent back flushing and cannot filter a large amount of amine liquid, and improve the purification efficiency of the amine liquid.
Furthermore, in this embodiment, the precoating tank and the filter are of conventional structures, and detailed structure arrangement is not described here.
Furthermore, the utility model is also provided with an oil removing system which is used for removing hydrocarbon, oil and other organic substances in the amine liquid, the oil removing system is arranged on the filtering system, and the filtering system is used for removing suspended matters and other impurities and also removing oil and other organic impurities.
Specifically, as shown in fig. 4 and 5, in this embodiment, the impurity removing unit adopts a double precoat filtration system, and as shown in fig. 2, the precoat layer includes a first precoat layer 51 and a second precoat layer 52, the first precoat layer 51 is attached to the filter blade 41, the second precoat layer 52 is attached to the first precoat layer 51, and the plurality of precoat layers are respectively used for removing organic impurities such as suspended matters and oil.
Further, the first precoat layer 51 is provided with a cellulose filter aid, the second precoat layer 52 is provided with a powdered activated carbon filter material, when the filtering operation is performed, cellulose precoat is performed first, the first precoat layer 51 is attached to the filter blade, then after the cellulose precoat is completed on the filter, the powdered activated carbon precoat is adopted to attach the activated carbon to the first precoat layer 51, and the purposes of filtering, degreasing and decoloring suspended matters in the amine liquid are simultaneously realized through a double precoat structure.
After the precoating of the first precoating layer 51 and the second precoating layer 52 is completed, material filtration is started, after the precoating is completed, material filtration is started, amine liquid is pumped into the filter, fine filter aid particles can provide countless fine channels, suspended impurities are blocked, clear liquid is only allowed to pass through, solid particles and impurities in the filtrate can be effectively removed, and organic substances such as hydrocarbons or oils in the amine liquid are removed through adsorption of activated carbon, so that the filtration of the amine liquid is completed.
As shown in fig. 6, the precoating filtration principle of the present utility model is:
The first precoating tank 8 forms a precoating cycle with the filter 4 through the first precoating pump 10 to realize cellulose precoating of the filter 4; the second precoating tank 9 is precoated with powdered activated carbon for the second time by a second precoating pump 11. After precoating is finished, material filtration is started, the amine liquid stock solution enters the filter 4, solid particles and impurities in the stock solution are effectively removed, and oil and organic impurities are also removed through adsorption of activated carbon. After the filter reaches the set filtration pressure difference, compressed air or nitrogen is introduced to discharge residual liquid in the filter, gas purging is carried out on the precoat layer and the filter cake of the filter, after the purging is finished, a filter vibrator is started, a deslagging butterfly valve at the bottom of the filter is started, and discharged precoat layer, filtered solids and the like are discharged out of the filter.
According to the utility model, a double precoating filtration system is adopted, after the cellulose precoating of the filter 4 is finished, powder activated carbon precoating is adopted again, the activated carbon is attached to the first cellulose layer, and the purposes of filtration, degreasing and decoloration are simultaneously realized through double precoating. After precoating is finished, material filtration is started, amine liquid is pumped into a filter, fine filter aid particles can provide countless fine channels, suspended impurities are caught, clear liquid is only allowed to pass through, solid particles and impurities in filtrate can be effectively removed, and oil and organic impurities are also removed through adsorption of activated carbon, so that the expected purpose is achieved. After the filtration is finished, after the filter cake is dried by nitrogen, a filter vibrator is started to apply high-frequency low-amplitude vibration impact to blades in the filter, the filter cake attached to the blades is vibrated and discharged out of the filter aid, and filter residues are mixed in the filter aid, so that the filter cake can be directly packaged for treatment.
The utility model adopts a double precoating filtration system, greatly reduces the cleaning times of the heat exchanger and the absorption tower, reduces the amine consumption and the unscheduled shutdown maintenance times, reduces the labor intensity of replacing the filter element of the filter, and ensures long-term stable operation. In addition, the purposes of solid removal, oil removal and decoloration can be simultaneously realized by combining the powder activated carbon through the filtration and adsorption of the precoat, and the viscosity of the amine liquid is reduced.
The device has simple structure and comprehensive functions, and can realize the solid removal, oil removal and decoloration of the amine liquid through a single filter; the filter blades can be prevented from being blocked by precoating filtration, the service life of the filter medium is prolonged, the double-layer precoating filtration precision is high, and the solid content of the filtered product is low; the single filtration time is long, frequent switching is not needed, the oscillating cleaning of the filter blades 41 is realized through the oscillator assembly 45, back flushing is not needed, and the product recovery rate is high.
Furthermore, in this embodiment, the impurity removing unit 1 and the desalting unit 2 are connected through a connecting pipeline, and as a result of degradation of the solvent itself, impurities in the raw gas, material carry-in and the like in the desulfurization and decarbonization process of the amine solution, various anions accumulate in the system, which is called as thermal steady-state salt.
Specifically, as shown in fig. 2 and 7, in the present embodiment, the electrode of the electrodialysis system 4 includes an anode 61 and a cathode 62, the anode 61 and the cathode 62 are respectively disposed at two ends of the electrodialysis system 3 and are both connected with the polar water tank 7, a plurality of fresh water chambers 31 and concentrated water chambers 32 are disposed between the anode 61 and the cathode 62, the fresh water chambers 31 and the concentrated water chambers 32 are adjacently staggered, the fresh water chambers 31 are connected with an external fresh water tank, and the concentrated water chambers 32 are connected with an external concentrated water tank for supplementing or outputting fresh water and concentrated water, respectively.
Further, the ion exchange membrane is disposed adjacent to the fresh water chamber 31 and the concentrate chamber 32, and the fresh water chamber 31 is connected to the concentrate chamber 32 through the ion exchange membrane. The ion exchange membranes include a cation exchange membrane 33 and an anion exchange membrane 34, and the cation exchange membrane 33 and the anion exchange membrane 34 are alternately arranged between the anode 61 and the cathode 62, respectively, so that the two sides of the fresh water chamber 31 or the concentrate chamber 32 are different ion exchange membranes, the cation exchange membrane 33 only allows cations to permeate, and the anion exchange membrane 34 only allows anions to permeate, thereby realizing separation of ions from the solution.
Further, in this embodiment, the filtration system of the impurity removal unit 1 is connected to the fresh water chamber 31 of the desalination unit 2 through a connection pipeline, the amine solution after the removal of solids and oil outputted from the filtration system flows into the fresh water chamber 31, cations in the amine solution in the fresh water chamber 31 enter the concentrated water chamber 32 through the cation exchange membrane 33 under the action of the cation exchange membrane 33 and the anion exchange membrane 34 on both sides of the fresh water chamber 31, anions in the amine solution enter the concentrated water chamber 32 through the anion exchange membrane 34, the heat stable anions and cations in the fresh water chamber 31 gradually decrease, the concentration of the anion and cation salt in the concentrated water chamber 32 gradually increases, and finally the salt in the amine solution is reduced to below 1%. The purified amine liquid after dialysis and desalination is output through a conveying pipeline, and the waste liquid containing the heat stable salt is discharged, so that the utility model realizes the amine liquid desalination through the membrane separation technology of an electrodialysis system.
The utility model uses the selective permeability of anions and cations in the ion exchange membrane, uses the potential difference as driving force under the action of the direct current electric field formed by the electrodes at the two sides, makes the anions and cations in the solution directionally migrate and permeate the selective ion exchange membrane, and separates the charged ions from the uncharged ions in the solution through the selective ion exchange membrane. When inorganic salt is added into the dialysis tank of the electrodialysis system, as shown in fig. 7 and 8, by taking NaCl as an example, ions in the concentrated water chamber solution are continuously concentrated under the action of an electric field, and ions in the fresh water chamber solution are continuously desalted, so that the separation purpose is achieved.
The utility model adopts the electrodialysis desalination technology, has fast desalination efficiency and short working time, and the total amount of wastewater generated by electrodialysis desalination is far lower than that generated by resin desalination; and the electrodialysis desalination does not need acid-base regeneration, the amine liquid loss in the electrodialysis process is small, and the anion and cation removal can be simultaneously carried out.
The device has simple structure and comprehensive functions, and can realize the solid removal, oil removal and decoloration of the amine liquid through a single filter; the filter blades can be prevented from being blocked by precoating filtration, the service life of the filter medium is prolonged, the double-layer precoating filtration precision is high, and the solid content of the filtered product is low; the single filtration time is long, frequent switching is not needed, the oscillating cleaning of the filter blades 41 is realized through the oscillator assembly 45, back flushing is not needed, and the product recovery rate is high. The utility model adopts the electrodialysis desalination technology, has fast desalination efficiency and short working time, and the total amount of wastewater generated by electrodialysis desalination is far lower than that generated by resin desalination; and the electrodialysis desalination does not need acid-base regeneration, the amine liquid loss in the electrodialysis process is small, the amine liquid supplementation is reduced, the cost is saved, the anion and cation removal can be simultaneously carried out, and finally, the salt in the MDEA system is reduced to below 1%.
The utility model adopts a double precoating filtration and electrodialysis filtration-oil removal-electrodialysis integrated amine liquid purification treatment process, removes suspended matters and other impurities to meet the electrodialysis feeding requirement range through a scheme, reduces the content of oil and other organic matters in the amine liquid, and finally removes heat stable salts to a required range by using an electrodialysis system 3. The utility model realizes full-automatic operation of equipment, has stable equipment operation and low labor intensity of operators, fundamentally solves the problems of frequent filter flushing, device corrosion, foaming and loss of amine liquid and the like in the operation of an amine liquid desulfurization system, improves the desulfurization efficiency and cleanliness of the amine liquid, reduces the equipment corrosion, is beneficial to the long-period operation of the device, and ensures the efficient and stable operation of the desulfurization system. The utility model can be applied to the purification, desalination and regeneration system of the MEDA amine liquid of the desulfurization and decarbonization device.
In the description of the present utility model, it should be understood that the directions or positional relationships such as the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (10)
1. An amine liquid clean system, includes impurity removal unit and desalination unit, its characterized in that:
The impurity removing unit is provided with a filtering system, and the filtering system comprises a filtering medium and a precoating layer containing a precoating material; the desalination unit is provided with an electrodialysis system, and the electrodialysis system comprises an electrode for providing a direct current electric field, an ion exchange membrane and a conveying unit for providing dialysis liquid for the electrodialysis system.
2. An amine liquid purification system as recited in claim 1, wherein: the filter system is characterized by further comprising an oil removal system, wherein the oil removal system is connected with the filter system.
3. An amine liquid purification system as recited in claim 1, wherein: the impurity removing unit adopts a double precoating filtration system, precoating layers are respectively used for removing suspended matters and organic impurities, and the impurity removing unit is connected with the desalting unit through connecting pipelines.
4. An amine liquid purification system as claimed in claim 1 or 3, wherein: the precoat layer includes a first precoat layer disposed on the filter media and a second precoat layer disposed on the first precoat layer.
5. An amine liquid purification system as recited in claim 4, wherein: the first precoat layer is made of a fiber deep filtration material, and the second precoat layer is made of an activated carbon filtration material.
6. An amine liquid purification system as recited in claim 1, wherein: the filtration system includes a vertical vane filter, the filter media being filter vanes disposed on the filter.
7. An amine liquid purification system as recited in claim 1, wherein: the electrode comprises an anode and a cathode, and a fresh water chamber and a concentrated water chamber which are arranged in a staggered way are arranged between the anode and the cathode.
8. An amine liquid purification system as recited in claim 7, wherein: the fresh water chamber is connected with the filtering system, and the concentrated water chamber is connected with a conveying unit.
9. An amine liquid purification system as recited in claim 7, wherein: the ion exchange membrane includes a cation exchange membrane and an anion exchange membrane, and the cation exchange membrane and the anion exchange membrane are alternately arranged between the anode and the cathode, respectively.
10. An amine liquid purification system as recited in claim 9, wherein: the cation exchange membrane and the anion exchange membrane are respectively arranged at two sides of the fresh water chamber, and the fresh water chamber is connected with the concentrated water chamber through the ion exchange membrane.
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| CN202322575399.3U CN220867237U (en) | 2023-09-21 | 2023-09-21 | Amine liquid purifying system |
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| CN202322575399.3U CN220867237U (en) | 2023-09-21 | 2023-09-21 | Amine liquid purifying system |
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