CN105749723B - The purification-recovery system of carbon dioxide in industrial tail gas - Google Patents
The purification-recovery system of carbon dioxide in industrial tail gas Download PDFInfo
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- CN105749723B CN105749723B CN201610256895.4A CN201610256895A CN105749723B CN 105749723 B CN105749723 B CN 105749723B CN 201610256895 A CN201610256895 A CN 201610256895A CN 105749723 B CN105749723 B CN 105749723B
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 79
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 42
- 238000011084 recovery Methods 0.000 title claims abstract description 31
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 133
- 230000023556 desulfurization Effects 0.000 claims abstract description 131
- 239000007788 liquid Substances 0.000 claims abstract description 89
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 86
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 84
- 230000008929 regeneration Effects 0.000 claims abstract description 47
- 238000011069 regeneration method Methods 0.000 claims abstract description 47
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims description 47
- 230000006835 compression Effects 0.000 claims description 46
- 238000007906 compression Methods 0.000 claims description 46
- 230000003068 static effect Effects 0.000 claims description 16
- 238000000746 purification Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 238000003795 desorption Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 239000005864 Sulphur Substances 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 4
- 240000005373 Panax quinquefolius Species 0.000 claims description 4
- 239000000110 cooling liquid Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000004508 fractional distillation Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0203—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle
- F25J1/0204—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle as a single flow SCR cycle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0027—Oxides of carbon, e.g. CO2
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
- F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
- F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
- F25J1/0235—Heat exchange integration
- F25J1/0237—Heat exchange integration integrating refrigeration provided for liquefaction and purification/treatment of the gas to be liquefied, e.g. heavy hydrocarbon removal from natural gas
- F25J1/0238—Purification or treatment step is integrated within one refrigeration cycle only, i.e. the same or single refrigeration cycle provides feed gas cooling (if present) and overhead gas cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/80—Separating impurities from carbon dioxide, e.g. H2O or water-soluble contaminants
- F25J2220/82—Separating low boiling, i.e. more volatile components, e.g. He, H2, CO, Air gases, CH4
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
- F25J2235/80—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/40—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
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- Gas Separation By Absorption (AREA)
Abstract
The present invention provides the purification-recovery systems of carbon dioxide in industrial tail gas, including purifying subsystem, contain CO2Unstripped gas through trapping compress after enter the purifying subsystem；Purifying subsystem includes desulfurization unit；Desulfurization unit includes at least two-step desulfurization module and regeneration module, and the mixture of unstripped gas and desulfurizing agent is delivered in first order desulfurization module, and the gas outlet of afterbody desulfurization module is the desulfurized gas outlet of desulfurization unit；The inlet connection of the desulfurizing agent rich solution outlet and regeneration module of every grade of desulfurization module, the liquid outlet of regeneration module are connect with the feed inlet of remaining desulfurization module in addition to first order desulfurization module respectively.In the present invention, Curve guide impeller is carried out to links, the energy of the generation of recycling system itself is made full use of to be reused, reduced energy consumption, carry out reduction system operation cost.
Description
Technical field
The present invention relates to the purifications of carbon dioxide in industrial tail gas Recovery Purifying technical field more particularly to industrial tail gas to return
Receipts system.
Background technology
In existing industrial tail gas, the content ratio of carbon dioxide is very high, is chemistry since carbon dioxide performance is stablized
It is inert, it cannot be removed by photochemistry or chemical action, therefore carbon dioxide is the principal element of greenhouse effects, so,
In the processing of raw material of industry gas, the purified treatment of carbon dioxide is also the most important thing.Simultaneously as the application of carbon dioxide also ten
Divide extensively, it can be applied in fields such as polymeric material, gaseous fertilizer, dry ice, carbon dioxide extinguisher, refrigerants.Therefore, by work
It is the measure that must be taken under Chinese energy overall situation in short supply that carbon dioxide in industry unstripped gas, which is recycled,.
In industrial tail gas, there are many sulfide-based ingredient, and therefore, when being purified to exhaust gas, sweetening process is must not
Can be less.Therefore many desulfurizing agent waste liquids are produced, at present currently, mostly using desulfurizing agent greatly and mixing progress desulfurization with exhaust gas
Processing for desulfurizing agent waste liquid is mostly regenerated offline utilization, and cannot be according to the desulfurization list of different series in regenerative process
The desulfurizing agent waste liquid that member generates carries out different processing, causes energy waste.
It, cannot be to recycling system meanwhile in the carbon dioxide recovery of current existing industrial tail gas is using system
The energy that inside generates is reused, and system operation cost height is caused.
Invention content
For the drawbacks described above and problem of the prior art, the object of the present invention is to provide in industrial tail gas carbon dioxide it is net
Change recovery system, the Recovery Purifying especially suitable for the carbon dioxide in sulfur recovery tail gas.
In order to achieve the above object, the present invention provides the following technical solutions：
The purification-recovery system of carbon dioxide in industrial tail gas, including purifying subsystem contain CO2Unstripped gas through trapping press
Enter the purifying subsystem after contracting；Wherein, the purifying subsystem includes desulfurization unit；The desulfurization unit includes at least two
Grade desulfurization module and regeneration module contain CO2Unstripped gas and desulfurizing agent mixture it is defeated by the feed inlet of first order desulfurization module
It send into first order desulfurization module, the gas outlet of afterbody desulfurization module is the desulfurized gas outlet of desulfurization unit；Every grade de-
The desulfurizing agent rich solution outlet of sulphur module is connect with the inlet of the regeneration module, the liquid outlet of the regeneration module respectively with except
The feed inlet of remaining desulfurization module outside first order desulfurization module connects；Desulfurizing agent rich solution enters the regeneration module, through regeneration
The desulfurizing agent lean solution that module regenerates recycles the desulfurizing agent as remaining desulfurization module in addition to first order desulfurization module.
Further, the desulfurization unit further includes desulfurizing agent circulating line, the inlet of the desulfurizing agent circulating line
It is connect with the desulfurizing agent rich solution outlet of afterbody desulfurization module, liquid outlet is connect with the feed inlet of first order desulfurization module.
Specifically, the desulfurization unit includes first order desulfurization module, second level desulfurization module and regeneration module, and described
The isolated first grade desulfurizing gas of first grade desulfurizing module enters the second level desulfurization module；The first order desulfurization module separation
Obtained desulfurizing agent rich solution enters the regeneration module, the desulfurizing agent lean solution cycle that desulfurizing agent rich solution is regenerated through regeneration module
Desulfurizing agent as second level desulfurization module.
Further, every grade of desulfurization module includes static mixer and liquid separation tank in at least two-step desulfurization module；Institute
The feed inlet for stating liquid separation tank is connect with the discharge port of the static mixer, the static mixing of gas outlet and next stage desulfurization module
The feed inlet of device connects, and liquid outlet is connect with the inlet of the regeneration module；Wherein, the liquid separation tank of afterbody desulfurization module
Gas outlet be desulfurized gas outlet.
Further, further include mixing arrangement in the desulfurization unit, the discharge port of the mixing arrangement with it is described at least
The air inlet of the first order desulfurization module of two-step desulfurization module connects, and feed inlet is respectively connected to contain CO2Unstripped gas and desulfurization
Agent.
Specifically, the mixing arrangement uses injector.
Further, the regeneration module includes filter device, heat-exchanger rig and regenerator, the feed liquor of the filter device
Mouth is connect with the desulfurizing agent rich solution outlet of at least two-step desulfurization module, and the desulfurizing agent rich solution is filtered through the filter device
Regenerator is entered by the feed inlet of the regenerator after exchanging heat by heat-exchanger rig, the desulfurization after the regenerator regeneration treatment
Agent lean solution is delivered to remaining desulfurization in addition to first order desulfurization module after being discharged by regenerator after being handled by heat-exchanger rig heat exchange
Desulfurizing agent is used as in module.
Further, the filter device includes the physisorptive filter device and bag filter being sequentially arranged, the object
The inlet of reason adsorption filter is connect with the desulfurizing agent rich solution outlet of at least two-step desulfurization module, liquid outlet and the bag
The inlet of formula filter connects；The liquid outlet of the bag filter is connect with the heat-exchanger rig.
Further, the regeneration module further includes tower top gas recovering device, and the tower top gas recovering device includes reflux
Tank；The feed inlet of the return tank is connect with the regeneration column overhead gas outlet, and top gas outlet is connect with external gas storage equipment,
The liquid circulation of bottom liquid outlet discharge, which is delivered in at least two-step desulfurization module, is used as desulfurizing agent.
In further preferred technical solution, the purifying subsystem further includes dewatering unit, and the desulfurization unit takes off
Sulphur gas vent is connect with the air inlet of the dewatering unit.
Further, the dewatering unit includes multiple drain sumps and desorption module；The air inlet of the multiple drain sump
It is connect with the desulfurized gas outlet of the desulfurization unit, gas outlet is clean gas outlet；The desorption module includes heater, sky
Letter shoot road and vapor discharge line, the gas outlet of the airflow pipe and the gas outlet of the multiple drain sump connect
It connects, the air inlet of the vapor discharge line is connect with the air inlet of the multiple drain sump；The heater is connected to institute
It states on airflow pipe, is heated for air.
Currently preferred technical solution is that the purification-recovery system of carbon dioxide in the industrial tail gas, further includes original
Expect that gas traps compression subsystem, the air inlet port access of the unstripped gas trapping compression subsystem contains CO2Unstripped gas, outlet side
Mouth is connect with the air inlet of the purifying subsystem.
Further, the unstripped gas trapping compression subsystem includes collecting buffer module, boost module and multi-stage compression
Module；The inlet end access for collecting buffer module contains CO2Unstripped gas, the inlet end of outlet side and the boost module connects
It connects；The air inlet of the multi-stage compression module is connect with the outlet side of the boost module, gas outlet and the purifying subsystem
Air inlet connection.
Further, every grade of compression module of the multi-stage compression module includes cooler, liquid separation tank and compressor, described
The feed inlet of liquid separation tank is connect with the gas outlet of the cooler, and gas outlet is connect with the air inlet of the compressor, water outlet
It is connect with external Sheng liquid device；The gas outlet of the compressor is connect with the air inlet of the cooler of next stage compression module；Its
In, the air inlet of the cooler of first order compression module is connect with the outlet side of the boost module, afterbody compression module
The gas outlet of compressor connect with the air inlet of the purifying subsystem.
Further, on the pipeline that the gas outlet of afterbody compression module is connect with the air inlet of the purifying subsystem
Access cooling device.By the gas cooling of entrance purifying subsystem to suitable temperature.
The further preferred technical solution of the present invention be further include CO2Liquefy subsystem, the CO2Liquefy subsystem into
Gas port is connect with the purification gas outlet of the purifying subsystem, and the purified gas that purifying subsystem is obtained carries out cooling liquid.
Further, the CO2The subsystem that liquefies includes heat exchanger, cold medium loop module and liquid separation tank, the heat exchange
The thermal medium inlet of device is connect with the purification gas outlet of the purifying subsystem, the feed inlet of cold medium outlet and the liquid separation tank
Connection；The cold medium loop module cold medium outlet connect with the cold medium import of the heat exchanger, thermal medium inlet and
The thermal medium outlet of the heat exchanger connects；Liquid carbon dioxide is discharged in the liquid outlet of the liquid separation tank.
Further, further include that liquid separation tank head space gas utilizes pipeline, the liquid separation tank head space gas to utilize the air inlet of pipeline
It is connect with the tank deck gas outlet of the liquid separation tank, gas outlet is connect with the second cold medium import of the heat exchanger；The heat exchange
Second thermal medium outlet of device is connect with evacuated tube.
Further, the cold medium loop module includes refrigeration machine, condenser and evaporator；The charging of the refrigeration machine
Mouth is connect with the thermal medium outlet of the heat exchanger, and discharge port is connect with the feed inlet of the condenser；The evaporator into
Material mouth is connect with the discharge port of the condenser, and discharge port is connect with the cold medium import of the heat exchanger.
In the industrial tail gas of the present invention in the purification-recovery system of carbon dioxide, Multistage desulfuration mould is used in purifying subsystem
Block carries out desulfurization step by step, and the desulfurizing agent waste liquid generated in desulfurization module is carried out on-line regeneration processing, is recycled after on-line regeneration
It is delivered in desulfurization modules at different levels and is used as desulfurizing agent, improve the recycling rate of waterused of desulfurizing agent, reduce the throwing of desulfurizing agent
Enter usage amount, it is energy saving.According further to sulfide composition in the desulfurizing agent waste liquid generated in the desulfurization module of different series
The difference of content, the desulfurizing agent that the desulfurizing agent rich solution of afterbody desulfurization module is directly used in first order desulfurization module use,
The operating load of regeneration module is reduced, energy consumption is reduced, improves sorbent utilization.
In the dewatering unit further provided in the present invention, desorption module is additionally arranged to drain sump, will be taken off using hot-air
The moisture adsorbed in water pot desorbs, and realizes desorption in situ, effect is good, does not influence to produce.
The unstripped gas trapping compression subsystem further provided in the present invention, the industrial tail gas being discharged by factory is delayed
After rushing steady pressure and eliminating particle micronic dust, after cooling, compressing boosting step by step, obtain with suitable temperature and pressure
Compression unstripped gas, provide suitable compression unstripped gas for subsequent purifying subsystem.
CO is additionally provided in the present invention2Liquefy subsystem, and the purified purified gas of purified subsystem is carried out coolant liquid
Change, and preferably will be used as heat transferring medium in the head space gas circulation conveying to heat exchanger of liquid separation tank, the cold energy of head space gas is carried out
It is recovered as the cold of purified gas.
In conclusion the carbon dioxide recovery of the industrial tail gas of the present invention changes links using in system
Into design, the energy generated to recycling system inside reuses, and reduces energy consumption, so reduce system operation at
This.
The carbon dioxide recovery of the industrial tail gas of the present invention is using system especially suitable for the dioxy in sulfur recovery tail gas
Change the Recovery Purifying of carbon.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 be the present invention industrial tail gas in carbon dioxide purification-recovery system structure diagram；
Fig. 2 is the structure connection diagram of the purifying subsystem of the present invention；
Fig. 3 is the structure connection diagram of the unstripped gas trapping compression subsystem of the present invention；
Fig. 4 is the CO of the present invention2The structure connection diagram of liquefaction subsystem.
Specific implementation mode
Below in conjunction with the embodiment of the present invention, technical scheme of the present invention is clearly and completely described, it is clear that
Described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, the every other embodiment that those of ordinary skill in the art are obtained without creative efforts belong to
The scope of protection of the invention.
According to Fig. 1 to Fig. 4, illustrate the purification-recovery system of carbon dioxide in the industrial tail gas of the present invention, including net
Sub-systems 10 contain CO2Unstripped gas through trapping compress after enter the purifying subsystem 10.
Wherein, the purifying subsystem 10 includes desulfurization unit 11；The desulfurization unit 11 includes at least two-step desulfurization mould
Block 111 and regeneration module 112 contain CO2Unstripped gas and desulfurizing agent mixture by first order desulfurization module feed inlet convey
Into first order desulfurization module I -111, the gas outlet of afterbody desulfurization module is the desulfurized gas outlet of desulfurization unit；Every grade
The desulfurizing agent rich solution outlet of desulfurization module is connect with the inlet of the regeneration module 112, the liquid outlet of the regeneration module 112
It is connect respectively with the feed inlet of remaining desulfurization module in addition to first order desulfurization module；Desulfurizing agent rich solution enters the regeneration module
112, obtained desulfurizing agent lean solution is regenerated through regeneration module 112 to be recycled as remaining desulfurization module in addition to first order desulfurization module
Desulfurizing agent.
With the increase of desulfurization series, the content of sulfide reduces step by step in unstripped gas, therefore, afterbody desulfurization module
Obtained desulfurizing agent rich solution can not have to regeneration treatment, and directly reflux is used as desulfurizing agent.Accordingly, it is preferred that technical solution
That the desulfurization unit 11 further includes desulfurizing agent circulating line 113, the inlet of the desulfurizing agent circulating line 113 with it is last
The desulfurizing agent rich solution outlet of first grade desulfurizing module connects, and liquid outlet is connect with the feed inlet of first order desulfurization module.Certainly, described
The liquid outlet of desulfurizing agent circulating line 113 can also be connect with the feed inlet of other grades of desulfurization module.
Specifically, the present invention in, in at least two-step desulfurization module 111 every grade of desulfurization module include static mixer and
Liquid separation tank；The feed inlet of the liquid separation tank is connect with the discharge port of the static mixer, gas outlet and next stage desulfurization module
Static mixer feed inlet connection, liquid outlet connect with the inlet of the regeneration module 112；Wherein, afterbody is de-
The gas outlet of the liquid separation tank of sulphur module is the desulfurized gas outlet of desulfurization unit.
Since the material being passed through in first order desulfurization module is to contain CO2Unstripped gas and desulfurizing agent mixture, i.e., logical
Enter first order desulfurization module is mixture, it is therefore preferable that technical solution is, further include mixing in the desulfurization unit 11
Device 114, the first order desulfurization module I -111 of the discharge port of the mixing arrangement 114 and at least two-step desulfurization module 111
Air inlet connection, feed inlet be respectively connected to contain CO2Unstripped gas and desulfurizing agent.It realizes and contains CO2Unstripped gas and desulfurizing agent it is mixed
It closes.Specifically, the mixing arrangement uses injector 114.
As shown in Fig. 2, the present invention provides a kind of desulfurization unit with two-step desulfurization module, that is, the desulfurization unit 11
Including first order desulfurization module I -111, second level desulfurization module II -111 and regeneration module 112；The first order desulfurization module
I -111 includes first order static mixer I -1111 and first order liquid separation tank I -1112；Second level desulfurization module II -111 includes
Second level static mixer II -1111 and second level liquid separation tank II -1112.The charging of the first order static mixer I -1111
Mouth access contains CO2Unstripped gas and desulfurizing agent mixture, the feed inlet of discharge port and the first order liquid separation tank I -1112 connects
It connects；The gas outlet of the first order liquid separation tank I -1112 is connect with the feed inlet of the second level static mixer II -1111, is taken off
Sulphur agent rich solution liquid outlet is connect with the inlet of the regeneration module 112.The feed inlet of second level liquid separation tank II -1112 with it is described
The discharge port of second level static mixer II -1111 connects, and gas outlet is the desulfurized gas outlet of desulfurization unit 11, and desulfurizing agent is rich
Liquid liquid outlet is connect by desulfurizing agent circulating line 113 with the feed inlet of the first order static mixer I -1111.It is described to draw
The discharge port of emitter 114 is connect with the feed inlet of the first order static mixer I -1111, a feed inlet of injector 114
Access contains CO2Unstripped gas, the desulfurizing agent lean solution outlet of another feed inlet and the regeneration module 112 connects, access regeneration
Desulfurizing agent.
The effect of regeneration module 112 in the desulfurization unit 11 is will be by the H in the desulfurizing agent rich solution after desulfurization2S
And CO2Removing obtains desulfurizing agent lean solution, and is reused the desulfurizing agent lean solution as desulfurizing agent, improves the utilization of desulfurizing agent
Rate.The present invention provides a kind of structures of specific regeneration module 112, specially：The regeneration module 112 includes filter device
1121, heat-exchanger rig 1122 and regenerator 1123, the inlet of the filter device 1121 and at least two-step desulfurization module
Every grade of desulfurization module 111 desulfurizing agent rich solution outlet (that is, liquid outlet of the liquid separation tank of every grade of desulfurization module 111) connection, institute
State desulfurizing agent rich solution through the filter device 1121 filtering after through heat-exchanger rig 1122 heat exchange after by the regenerator 1123 into
Material mouth enters regenerator 1123, and the desulfurizing agent lean solution obtained after 1123 regeneration treatment of the regenerator is discharged by regenerator 1123
By by being delivered to remaining desulfurization in addition to first order desulfurization module using circulating pump 1124 after 1122 heat exchange of heat-exchanger rig processing
Desulfurizing agent is used as in module.It, can also be again into conveyance conduit during being delivered in desulfurization module through desulfurizing agent lean solution
A certain amount of water is added, desulfurizing agent lean solution is allocated to suitable concentration.Wherein, the heat-exchanger rig 1122 realizes desulfurizing agent
The heat exchange of rich solution and desulfurizing agent lean solution.Wherein, a reboiler 1125 is arranged in 1123 bottom of regenerator, coordinates regenerator
1123 realize that the fractionation of desulfurizing agent rich solution removes H therein2S and CO2。
Heat-exchanger rig 1122 in the regeneration module 112 specifically uses heat exchanger, it is preferred to use plate heat exchanger.
In desulfurizing agent rich solution after mixing desulfurization process with unstripped gas, containing certain impurity, therefore, it is necessary to pass through
Filter device 1121 is filtered it purification, and specifically, the filter device 1121 in the present invention includes the object being sequentially arranged
Manage adsorption filter 11211 (specifically using active carbon filter) and bag filter 11212, the physisorptive filter device
11211 inlet is connect with the desulfurizing agent rich solution outlet of at least two-step desulfurization module 111, liquid outlet and the pocket type mistake
The inlet of filter 11212 connects；The liquid outlet of the bag filter 11212 is connect with the heat-exchanger rig 1122.
In fractional distillation process of the desulfurizing agent rich solution in regenerator 1123, gas is will produce, and be discharged by the tower top of regenerator,
Referred to as tower overhead gas is also mingled with some desulfurization agent molecules in the tower overhead gas, therefore the regeneration module 112 of the present invention further includes tower
Top gas retracting device 1126, the tower top gas recovering device 1126 include return tank；The feed inlet of the return tank 1126 and institute
The connection of 1123 tower top gas outlet of regenerator is stated, top gas outlet (predominantly acid gas) is connect with external gas storage equipment, and bottom goes out liquid
The liquid (containing desulfurizing agent) of mouth discharge utilizes to be made in 11261 circulation conveying of circulating pump at least two-step desulfurization module 111
For desulfurizing agent.Preferably, connect on the pipeline that the feed inlet of return tank 1126 is connect with 1123 tower top gas outlet of the regenerator
Cooler 11262 is connect, tower overhead gas is cooled down.
Containing CO2Unstripped gas after desulfurization process, wherein being centainly mingled with certain moisture, influence subsequent technique behaviour
Make, therefore, the purifying subsystem 10 further includes dewatering unit 12, as shown in Fig. 2, the processed gas of the desulfurization unit 11 goes out
Mouth is connect with the air inlet of the dewatering unit 12.Specifically, the dewatering unit includes multiple drain sumps 121 and desorption module
122；The air inlet of the multiple drain sump 121 is connect with the desulfurized gas outlet of the desulfurization unit 11, and gas outlet is purification
Gas exports；The desorption module 122 includes heater 1221, airflow pipe 1222 and vapor discharge line 1223, institute
The gas outlet for stating airflow pipe 1222 is connect with the gas outlet of the multiple drain sump 121, the vapor discharge line
1223 air inlet is connect with the air inlet of the multiple drain sump 121；The heater 1221 is connected to the air delivery
On pipeline 1222, heated for air.After processed gas enters multiple drain sumps, the absorbent (for example, molecular sieve) in drain sump
Moisture in Absorption Desulfurization gas, purified purified gas are expelled to downstream by the outlet of multiple drain sumps.The desorption
Module 122 is exactly to suck out hydrolysis in the water absorbing agent in multiple drain sumps, and take drain sump out of, via desorption module 122
The gas of the gas outlet discharge of vapor discharge line 1223 is known as regeneration gas.As shown in Figure 2, the multiple drain sump 121
Number be 2.Preferably, on the clarifier transfer pipeline connected on the gas outlet of the multiple drain sump 121, also increase
Provided with filter device 123, filtering is optimized to purified gas, increases the cleannes of purified gas.
In the industrial tail gas of the present invention in the purification-recovery system of carbon dioxide, due to delivering into purifying subsystem 10
Containing CO2Unstripped gas need to trap compression, in the purification-recovery system of carbon dioxide further include unstripped gas in industrial tail gas therefore
Compression subsystem 20 is trapped, CO will be contained2Unstripped gas carry out trapping compression, obtain having certain pressure contains CO2Unstripped gas.
The air inlet port access of the unstripped gas trapping compression subsystem 20 contains CO2Unstripped gas, air outlet and the purification subsystem
The air inlet connection of system 10.
Specifically, as shown in figure 3, providing a kind of specific unstripped gas trapping compression subsystem 20 in the present invention, including
Collect buffer module 21, boost module 22 and multi-stage compression module 23；The inlet end for collecting buffer module 21 is raw material
Gas traps the air inlet port of compression subsystem 20, and access contains CO2Unstripped gas, the inlet end of outlet side and the boost module 22
Connection；The air inlet of the multi-stage compression module 23 is connect with the outlet side of the boost module 22, gas outlet and the purification
The air inlet of subsystem 10 connects.
The collection buffer module 21 uses surge tank, contains CO2Unstripped gas enter the buffer tank, a part of tiny
Grain is detained, and is discharged by surge tank bottom blow-down mouth.
The boost module 22 uses air blower, to containing CO2Unstripped gas be pressurized.It is preferred that using Roots blower.
Every grade of compression module of the multi-stage compression module 23 includes cooler, liquid separation tank and compressor, the liquid separation tank
Feed inlet connect with the gas outlet of the cooler, gas outlet is connect with the air inlet of the compressor, water outlet with it is external
Contain liquid device connection；The gas outlet of the compressor is connect with the air inlet of the cooler of next stage compression module；Wherein, first
The air inlet of the cooler of grade compression module is connect with the outlet side of the boost module 22 (air blower), and afterbody compresses mould
The gas outlet of the compressor of block is connect with the air inlet of the purifying subsystem 10.
Specifically, as shown in Figure 3, the multi-stage compression module 23 includes two-stage compression module, and the first order compresses mould
Block I -23 and second level compression module II -23, first order compression module I -23 include that level-one cooler I -231 is (specific using empty
Cooler), level-one liquid separation tank I -232 and stage compressor I -233, second level compression module II -23 includes secondary coolers II -
231 (specifically using cooler), two level liquid separation tank II -232 and split-compressor II -233.The level-one cooler I -231
Air inlet is connect with the gas outlet of the boost module 22.The feed inlet of the level-one liquid separation tank I -232 is cooled down with the level-one
The gas outlet of device I -231 connects, and gas outlet is connect with the air inlet of the stage compressor I -233, water outlet and external Sheng liquid
Device connects.The gas outlet of the stage compressor I -233 is connect with the air inlet of the secondary coolers II -231；Described two
The feed inlet of fraction flow container II -232 is connect with the gas outlet of the secondary coolers II -231, gas outlet and the two-stage compression
The air inlet of machine II -233 connects, and water outlet is connect with external Sheng liquid device.The gas outlet of the split-compressor II -233 with
The air inlet of the purifying subsystem 10 connects.
Containing CO2By the cooling step by step of multi-stage compression module 23 and after compressing of unstripped gas, obtain with certain pressure
Unstripped gas, temperature is also reduced in reasonable range.Contain CO in the present invention in order to further decrease2Unstripped gas temperature,
Preferably, the gas outlet of afterbody compression module (such as second level compression module II -23) and the purifying subsystem 10
Cooling device 24 is accessed on the pipeline of air inlet connection.The gas for entering purifying subsystem 10 is cooled to temperature preferably
Degree.Specifically, the cooling device 24 uses air cooler.
In the industrial tail gas of the present invention in the purification-recovery system of carbon dioxide, contain CO2The purified subsystem of unstripped gas
It is purified gas after 10 purifications, in order to by CO2Purified gas more preferably storage or transport, further includes CO in of the invention2Liquefy subsystem
30, the CO2The air inlet of liquefaction subsystem 30 is connect with the purification gas outlet of the purifying subsystem 10, by purifying subsystem
10 obtained purified gas carry out cooling liquid.
Specifically, as shown in figure 4, the CO2The subsystem 30 that liquefies includes heat exchanger 31, cold medium loop module 32 and divides
Flow container 33, the thermal medium inlet 311 of the heat exchanger 31 are connect with the purification gas outlet of the purifying subsystem 10, and cold medium goes out
Mouth 312 is connect with the feed inlet of the liquid separation tank 33；The cold medium outlet 3201 of the cold medium loop module 32 is changed with described
The cold medium import 313 of hot device 31 connects, and thermal medium inlet 3202 is connect with the thermal medium outlet 314 of the heat exchanger 31.Institute
The liquid carbon dioxide for stating the discharge of 33 bottom of liquid separation tank is delivered to carbon dioxide storage tank using turning oil pump 331, is stored.
The liquid separation tank 33 is that carbon dioxide after cooling is carried out liquefied equipment, and liquid carbon dioxide is via liquid separation
The bottom liquid outlet discharge of tank 33, also will produce a part of gas, is discharged by the tank deck gas outlet of liquid separation tank in the process, should
The temperature of portion gas is also very low, therefore, in order to energy saving, makes full use of the cryogenic gas of tank deck, CO of the invention2
Liquid separation tank head space gas is also additionally arranged in liquefaction subsystem 30 utilizes pipeline 34, the liquid separation tank head space gas to utilize the air inlet of pipeline 34
Mouth is connect with the tank deck gas outlet of the liquid separation tank 33, and gas outlet is connect with the second cold medium import 315 of the heat exchanger 31；
Second thermal medium outlet 316 of the heat exchanger is connect with evacuated tube, and the head space gas after heat exchange is emptied.
The heat exchanger 31 preferably uses plate-fin heat exchanger.
The cold medium loop module 32 uses existing module.A kind of specific cold medium is given in the present invention to follow
Ring moulds block 32, including refrigeration machine 321, condenser 322 and evaporator 323；The feed inlet of the refrigeration machine 321 (i.e. follow by cold medium
The thermal medium inlet 3202 of ring moulds block 32) it is connect with the thermal medium outlet 314 of the heat exchanger 31, discharge port and the condenser
322 feed inlet connection；The feed inlet of the evaporator 323 is connect with the discharge port of the condenser 322, and discharge port is (i.e. cold
The cold medium import 3201 of medium circulation module 32) it is connect with the cold medium import 313 of the heat exchanger 31.
In cold medium loop module 32, evaporator 323 will be needed through being evaporated processing through condensed cold medium of freezing
Want heat source.And carbon dioxide containing gas (purified gas), after the cooling of heat exchanger 31, temperature is not up to most ideal value, because
This, preferred technical solution is in the present invention, the feed inlet of the cold medium outlet 312 and the liquid separation tank 33 of the heat exchanger 31
Connecting line in access the evaporator 323, will enter through 31 carbon dioxide containing gas after cooling (purified gas) of heat exchanger
In evaporator 323, as evaporation heat source of the cold medium in evaporator.Further heat release is cold for carbon dioxide containing gas (purified gas)
But liquid separation tank 33 extremely is entered back into after lower temperature, improves liquefaction effect.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. the purification-recovery system of carbon dioxide in industrial tail gas, which is characterized in that including purifying subsystem, contain CO2Unstripped gas
Enter the purifying subsystem after trapping is compressed；Wherein, the purifying subsystem includes desulfurization unit；The desulfurization unit packet
At least two-step desulfurization module and regeneration module are included, CO is contained2Unstripped gas and desulfurizing agent mixture by first order desulfurization module
Feed inlet is delivered in first order desulfurization module, and the gas outlet of afterbody desulfurization module goes out for the processed gas of desulfurization unit
Mouthful；The desulfurizing agent rich solution outlet of every grade of desulfurization module is connect with the inlet of the regeneration module, and the regeneration module goes out liquid
Mouth is connect with the feed inlet of remaining desulfurization module in addition to first order desulfurization module respectively；Desulfurizing agent rich solution enters the regeneration mould
Block, the desulfurizing agent lean solution cycle regenerated through regeneration module is as the de- of remaining desulfurization module in addition to first order desulfurization module
Sulphur agent；
Every grade of desulfurization module includes static mixer and liquid separation tank in at least two-step desulfurization module；The charging of the liquid separation tank
Mouth is connect with the discharge port of the static mixer, and gas outlet and the feed inlet of the static mixer of next stage desulfurization module connect
It connects, liquid outlet is connect with the inlet of the regeneration module；Wherein, the gas outlet of the liquid separation tank of afterbody desulfurization module is de-
Sulphur gas vent；
Further include mixing arrangement in the desulfurization unit, the discharge port of the mixing arrangement and at least two-step desulfurization module
First order desulfurization module air inlet connection, feed inlet be respectively connected to contain CO2Unstripped gas and desulfurizing agent.
2. the purification-recovery system of carbon dioxide in industrial tail gas according to claim 1, which is characterized in that the desulfurization
Unit further includes desulfurizing agent circulating line, the desulfurizing agent of the inlet and afterbody desulfurization module of the desulfurizing agent circulating line
Rich solution outlet connects, and liquid outlet is connect with the feed inlet of first order desulfurization module.
3. the purification-recovery system of carbon dioxide in industrial tail gas according to claim 1, which is characterized in that the regeneration
Module includes filter device, heat-exchanger rig and regenerator, the inlet of the filter device and at least two-step desulfurization module
Desulfurizing agent rich solution outlet connection, the desulfurizing agent rich solution through the filter device filtering after after heat-exchanger rig exchanges heat by described
The feed inlet of regenerator enters regenerator, the desulfurizing agent lean solution after the regenerator regeneration treatment be discharged by regenerator after through by
It is delivered in remaining desulfurization module in addition to first order desulfurization module after heat-exchanger rig heat exchange processing and is used as desulfurizing agent；
The regeneration module further includes tower top gas recovering device, and the tower top gas recovering device includes return tank；The return tank
Feed inlet connect with the regeneration column overhead gas outlet, top gas outlet connect with external gas storage equipment, and bottom liquid outlet is arranged
The liquid circulation gone out is delivered in at least two-step desulfurization module and is used as desulfurizing agent.
4. the purification-recovery system of carbon dioxide in industrial tail gas according to claim 1, which is characterized in that the purification
Subsystem further includes dewatering unit, and the desulfurized gas outlet of the desulfurization unit is connect with the air inlet of the dewatering unit；Institute
It includes multiple drain sumps and desorption module to state dewatering unit；The desulfurization of the air inlet of the multiple drain sump and the desulfurization unit
Gas vent connects, and gas outlet is clean gas outlet；The desorption module includes heater, airflow pipe and vapor row
Go out pipeline, the gas outlet of the airflow pipe is connect with the gas outlet of the multiple drain sump, the vapor discharge pipe
The air inlet in road is connect with the air inlet of the multiple drain sump；The heater is connected on the airflow pipe.
5. the purification-recovery system of carbon dioxide, feature exist in industrial tail gas according to any one of claim 1 to 4
In the purification-recovery system further includes unstripped gas trapping compression subsystem, the air inlet of the unstripped gas trapping compression subsystem
Port access contains CO2Unstripped gas, air outlet connect with the air inlet of the purifying subsystem；The unstripped gas trapping compression
Subsystem includes collecting buffer module, boost module and multi-stage compression module；The inlet end access for collecting buffer module contains
CO2Unstripped gas, outlet side is connect with the inlet end of the boost module；The air inlet of the multi-stage compression module and the increasing
The outlet side of die block connects, and gas outlet is connect with the air inlet of the purifying subsystem.
6. the purification-recovery system of carbon dioxide in industrial tail gas according to claim 5, which is characterized in that the multistage
Every grade of compression module of compression module includes cooler, liquid separation tank and compressor, feed inlet and the cooling of the liquid separation tank
The gas outlet of device connects, and gas outlet is connect with the air inlet of the compressor, and water outlet is connect with external Sheng liquid device；The pressure
The gas outlet of contracting machine is connect with the air inlet of the cooler of next stage compression module；Wherein, the cooler of first order compression module
Air inlet connect with the outlet side of the boost module；The gas outlet of the compressor of afterbody compression module and the purification
The air inlet of subsystem connects, and accesses cooling device on the pipeline connected.
7. the purification-recovery system of carbon dioxide, feature exist in industrial tail gas according to any one of claim 1 to 4
In the purification-recovery system further includes CO2Liquefy subsystem, the CO2The air inlet of liquefaction subsystem and purification
The purification gas outlet of system connects, and the purified gas that purifying subsystem is obtained carries out cooling liquid；The CO2Liquefy subsystem packet
Include heat exchanger, cold medium loop module and liquid separation tank, the purification of the thermal medium inlet of the heat exchanger and the purifying subsystem
Gas outlet connects, and cold medium outlet is connect with the feed inlet of the liquid separation tank；The cold medium of the cold medium loop module exports
It is connect with the cold medium import of the heat exchanger, thermal medium inlet is connect with the thermal medium outlet of the heat exchanger；The liquid separation
Liquid carbon dioxide is discharged in the liquid outlet of tank.
8. the purification-recovery system of carbon dioxide in industrial tail gas according to claim 7, which is characterized in that further include point
Flow container head space gas utilizes pipeline, the liquid separation tank head space gas to connect using the air inlet of pipeline and the tank deck gas outlet of the liquid separation tank
It connects, gas outlet is connect with the second cold medium import of the heat exchanger；The second thermal medium outlet and evacuated tube of the heat exchanger
Connection.
9. the purification-recovery system of carbon dioxide in industrial tail gas according to claim 7, which is characterized in that cold Jie
Matter loop module includes refrigeration machine, condenser and evaporator；The feed inlet of the refrigeration machine and the thermal medium of the heat exchanger go out
Mouth connection, discharge port are connect with the feed inlet of the condenser；The discharge port of the feed inlet of the evaporator and the condenser
Connection, discharge port are connect with the cold medium import of the heat exchanger.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102119050A (en) * | 2008-08-11 | 2011-07-06 | 爱德华兹有限公司 | Purification of a gas stream |
| CN102303865A (en) * | 2011-08-15 | 2012-01-04 | 安庆凯美特气体有限公司 | Improved production method of food-grade liquid carbon dioxide product |
| CN103497802A (en) * | 2013-09-29 | 2014-01-08 | 银川天佳仪器仪表有限公司 | Device for removing acid gas in natural gas |
| CN103691274A (en) * | 2013-11-14 | 2014-04-02 | 中国石油化工股份有限公司 | Method for production regulation of chelated iron desulfurization process |
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2016
- 2016-04-22 CN CN201610256895.4A patent/CN105749723B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102119050A (en) * | 2008-08-11 | 2011-07-06 | 爱德华兹有限公司 | Purification of a gas stream |
| CN102303865A (en) * | 2011-08-15 | 2012-01-04 | 安庆凯美特气体有限公司 | Improved production method of food-grade liquid carbon dioxide product |
| CN103497802A (en) * | 2013-09-29 | 2014-01-08 | 银川天佳仪器仪表有限公司 | Device for removing acid gas in natural gas |
| CN103691274A (en) * | 2013-11-14 | 2014-04-02 | 中国石油化工股份有限公司 | Method for production regulation of chelated iron desulfurization process |
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