CN106731476A - A kind of conversion gas pressure-variable adsorption and the united technique of ammoniacal liquor after-purification - Google Patents

A kind of conversion gas pressure-variable adsorption and the united technique of ammoniacal liquor after-purification Download PDF

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Publication number
CN106731476A
CN106731476A CN201611181215.3A CN201611181215A CN106731476A CN 106731476 A CN106731476 A CN 106731476A CN 201611181215 A CN201611181215 A CN 201611181215A CN 106731476 A CN106731476 A CN 106731476A
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gas
tower
ammonia
weak aqua
aqua ammonia
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CN201611181215.3A
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杨皓
刘康健
钟俊波
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    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • 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
    • B01D53/62—Carbon oxides
    • 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
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Treating Waste Gases (AREA)

Abstract

The present invention relates to the technique that a kind of conversion gas pressure-variable adsorption combines decarburization with ammoniacal liquor after-purification,There is the Ammonia Production device of conversion gas carbonizing apparatus,Partial Transformation gas sequentially enters carbonizing apparatus king-tower,Pay tower,It is fixed to pay tower,Carbon dioxide removal is referred to as carbon gas to 0.1 ~ 0.2%,Partial Transformation gas enters pressure-swing absorption apparatus decarburization,Outlet gas concentration lwevel control is 0.8 ~ 1.0%,Referred to as one-level decarbonization gas,One-level decarbonization gas to be sent to continue without sulphur weak aqua ammonia tower and purify carbon dioxide,Weak aqua ammonia tower exit gas gas concentration lwevel is controlled 0.1 ~ 0.2%,Referred to as purified gas,Carbon gas is mixed into recovery and rinsing tower with purified gas,Without the control of sulphur weak aqua ammonia tower ammonia concn in 30 ~ 50 titres,Ammoniacal liquor changes 20 ~ 30% for every eight hours,Ammonia temperature is controlled below 35 DEG C,Conversion gas carbonizing apparatus weak aqua ammonia groove is sent without sulphur weak aqua ammonia tower carbonated aqueous ammonia.

Description

A kind of conversion gas pressure-variable adsorption and the united technique of ammoniacal liquor after-purification
Technical field
It is a kind of effective reduction method of the energy consumption with cutting down the consumption of raw materials the present invention relates to chemical industry and field of Environment Protection.
Background technology
1st, there is the Ammonia Production device of carbonizing apparatus for 0.8MPa, at the beginning of construction, conversion gas are all set by carbonization Standby carbon dioxide removal, purifying carbon dioxide gas concentration Con trolling index is 0.1 ~ 0.2%.Due to simple production ammonium hydrogen carbonate influence Enterprise marketing, it will usually Partial Transformation gas is used pressure swing absorption process carbon dioxide removal, a part of commodity liquid is thus produced Ammonia, gas concentration lwevel Con trolling index is 0.1 ~ 0.2% in usual pressure-swing absorption apparatus exit gas.
2nd, pressure swing adsorption decarbonization exit concentration is controlled 0.1 ~ 0.2%, using a stage pressure swing adsorption apparatus, regeneration gas dioxy The construction cost for changing concentration of carbon device when can typically reach 85 ~ 89% is fewer, pressure swing adsorption purge gas and carbonization recovery and rinsing Tower is worked off one's feeling vent one's spleen directly to mix and sends into subsequent compression workshop section.The loss of decarbonization device hydrogen and nitrogen gas is about to enter pressure-swing absorption apparatus conversion The 3.4 ~ 4.9% of gas.
3rd, pressure swing adsorption decarbonization exit concentration can be controlled 0.8 ~ 1.0%, using a stage pressure swing adsorption apparatus, regeneration gas The construction cost of device is both economical when gas concentration lwevel can typically reach 91 ~ 92%.Decarbonization device hydrogen and nitrogen gas lose about It is 2.4 ~ 2.7% into pressure-swing absorption apparatus conversion gas.Join the synthesis ammonia plant of alcohol, pressure swing adsorption purge gas and carbonization for having Purified gas directly mix workshop section after feeding.For without connection alcohol synthesis ammonia plant, pressure swing adsorption purge gas can not directly with carbonization The direct Song Hou workshop sections of purified gas mixing, but pressure swing adsorption purge gas and a carbonization pair tower are worked off one's feeling vent one's spleen and is mixed into a fixed pair of tower. It is fixed to pay the control of tower ammoniacal liquor inlet concentration in 20 ~ 30 titres because the purification that tower tail gas is paid in carbonization needs, it is fixed to pay tower bottom ammonia Water concentration reaches 100 titres, therefore, the ammonia ratio that gaseous mixture is taken out of from fixed pair of tower bubbling segment is not had pressure swing adsorption purge gas How too many pay the ammonia that tower takes out of from fixed when mixing, causes recovery tower weak aqua ammonia superfluous serious, it is impossible to reach weak aqua ammonia 0 Emission request.When summer temperature is higher than 35 DEG C, weak aqua ammonia excess quantity is bigger.
Conversion gas 15000NM3/ H, pressure-variable adsorption outlet carbon dioxide 0.1 ~ 0.2%, it is 100% to invest, and vavuum pump power consumption is 100%, average gas loss is 4%.Pressure-variable adsorption exports carbon dioxide 0.8 ~ 1.0%, and it is 80% to invest, and vavuum pump power consumption is 80%. Average gas loss is 2.55%.
The content of the invention
In order to reduce PSA Gas loss, pressure-variable adsorption power consumption is reduced, while reducing weak aqua ammonia growing amount, make dilute ammonia Water reaches 0 discharge, is worked off one's feeling vent one's spleen using pressure swing adsorption decarbonization equipment by reasonably different from carbonization main and auxiliary tower characteristic of working off one's feeling vent one's spleen Feature, the present inventor has invented the technique that a kind of conversion gas pressure-variable adsorption combines decarburization with ammoniacal liquor after-purification.
Characterized in that, a whole set of synthetic ammonia installation, has Partial Transformation gas to enter carbonizing apparatus and produces carbon ammonium, carbonization outlet two Oxidation concentration of carbon control is 0.1 ~ 0.2%；Partial Transformation gas enters pressure-swing absorption apparatus decarburization, outlet gas concentration lwevel control 0.8 ~ 1.0%, referred to as one-level decarbonization gas, one-level decarbonization gas are sent to special to be set up 1 and continues to purify titanium dioxide without sulphur weak aqua ammonia tower Carbon, the control of last weak aqua ammonia tower exit gas gas concentration lwevel 0.1 ~ 0.2%, referred to as purified gas, last is without sulphur Weak aqua ammonia tower ammoniacal liquor inlet concentration is controlled in 30 ~ 50 titres, and ammoniacal liquor changes 20 ~ 30% for every eight hours, and ammonia temperature is controlled at 35 DEG C Hereinafter, the fixation pair tower without sulphur ammoniacal liquor tower exit gas and carbonizing apparatus is worked off one's feeling vent one's spleen and is mixed into recovery and rinsing tower, without sulphur carbonization Ammoniacal liquor send conversion gas carbonisation to use.
By pressure-variable adsorption work off one's feeling vent one's spleen feeding it is special set up without the purification of sulphur ammoniacal liquor tower, the conversion gas with equivalent are inhaled by transformation Directly send carbonization to pay tower or fix a pair tower after adsorption device to compare, send carbonizing apparatus ammoniacal liquor to reduce required for recovery and rinsing tower a lot, It is possible thereby to realize that weak aqua ammonia is reduced send outside or outer discharge capacity, realize that weak aqua ammonia 0 is discharged substantially.
Specific embodiment
Embodiment 1：Certain 60,000 tons/year of synthetic ammonia installation, 0.8MPa pressure adds up to 3.6 ten thousand mark sides/hour conversion gas, 2.1 Ten thousand mark sides/hour conversion pneumatic transmission carbonization king-tower, the carbonization king-tower outlet feeding of gas concentration lwevel 5 ~ 8% pays tower, pays tower outlet dioxy Change fixed pair of tower of the feeding of concentration of carbon 0.8 ~ 1.0%, fixed tower outlet gas concentration lwevel 0.1% of paying send recovery and rinsing tower.1.5 ten thousand marks Side/hour converts pneumatic transmission pressure-variable adsorption, and purified gas gas concentration lwevel is 0.8%, and it is net without sulphur ammoniacal liquor that purified gas feeding is newly set up Change tower, exit gas gas concentration lwevel reaches 0.1%, be 30 ~ 50 titres without sulphur ammoniacal liquor, 20 ~ 30% are changed for every eight hours, change Without sulphur carbonated aqueous ammonia send carbonization weak aqua ammonia groove.Tower is paid without sulphur ammoniacal liquor purifying column exit gas with the fixation of carbonizing apparatus to work off one's feeling vent one's spleen Mixing, send the recovery and rinsing tower of carbonizing apparatus.Directly controlled compared with 0.1% with pressure-variable adsorption outlet gas concentration lwevel, vacuum Pump power consumption reduction 90kw, hydrogen and nitrogen gas gas loss reduces 300NM3/H.Without sulphur ammoniacal liquor tower aqua ammonia pump power consumption average out to 0.3kw.With Pressure-variable adsorption is worked off one's feeling vent one's spleen and 0.9% is directly entered a fixed tower of paying and compares, and recovery and rinsing tower weak aqua ammonia reduces 40%, and weak aqua ammonia is realized substantially 0 discharge.
Embodiment 2：Certain 80,000 tons/year of synthetic ammonia installation, 1.3MPa pressure adds up to 4.8 ten thousand mark sides/hour conversion gas, 3.3 Ten thousand mark sides/hour conversion pneumatic transmission carbonization king-tower, the carbonization king-tower outlet feeding of gas concentration lwevel 5 ~ 8% pays tower, pays tower outlet dioxy Change fixed pair of tower of the feeding of concentration of carbon 0.8 ~ 1.0%, fixed tower outlet gas concentration lwevel 0.1% of paying send recovery and rinsing tower.1.5 ten thousand marks Side/hour converts pneumatic transmission pressure-variable adsorption, and purified gas gas concentration lwevel is 0.9%, and it is net without sulphur ammoniacal liquor that purified gas feeding is newly set up Change tower, exit gas gas concentration lwevel reaches 0.1%, be 30 ~ 50 titres without sulphur ammoniacal liquor, 20 ~ 30% are changed for every eight hours, change Without sulphur carbonated aqueous ammonia send carbonization weak aqua ammonia groove.Tower is paid without sulphur ammoniacal liquor purifying column exit gas with the fixation of carbonizing apparatus to work off one's feeling vent one's spleen Mixing, send the recovery and rinsing tower of carbonizing apparatus.Directly controlled compared with 0.1% with pressure-variable adsorption outlet gas concentration lwevel, vacuum Pump power consumption reduction 90kw, hydrogen and nitrogen gas gas loss reduces 315NM3/H.Without sulphur ammoniacal liquor tower aqua ammonia pump power consumption average out to 0.34kw.With Pressure-variable adsorption is worked off one's feeling vent one's spleen and 0.9% is directly entered a fixed tower of paying and compares, and recovery and rinsing tower weak aqua ammonia reduces 40%, and weak aqua ammonia is realized substantially 0 discharge.
Embodiment 3：Certain 80,000 tons/year of synthetic ammonia installation, 0.8MPa pressure adds up to 4.8 ten thousand mark sides/hour conversion gas, 2.4 Ten thousand mark sides/hour conversion pneumatic transmission carbonization king-tower, the carbonization king-tower outlet feeding of gas concentration lwevel 5 ~ 8% pays tower, pays tower outlet dioxy Change fixed pair of tower of the feeding of concentration of carbon 0.8 ~ 1.0%, fixed tower outlet gas concentration lwevel 0.1% of paying send recovery and rinsing tower.1.5 ten thousand marks Side/hour converts pneumatic transmission pressure-variable adsorption, and purified gas gas concentration lwevel is 1.0%, and it is net without sulphur ammoniacal liquor that purified gas feeding is newly set up Change tower, exit gas gas concentration lwevel reaches 0.1%, be 30 ~ 50 titres without sulphur ammoniacal liquor, 20 ~ 30% are changed for every eight hours, without sulphur Carbonated aqueous ammonia send carbonization weak aqua ammonia groove.Pay tower and work off one's feeling vent one's spleen with the fixation of carbonizing apparatus without sulphur ammoniacal liquor purifying column exit gas and mix, Send the recovery and rinsing tower of carbonizing apparatus.Directly controlled compared with 0.1% with pressure-variable adsorption outlet gas concentration lwevel, vavuum pump electricity Consumption reduces 110kw, and hydrogen and nitrogen gas gas loss reduces 360NM3/H.Without sulphur ammoniacal liquor tower aqua ammonia pump power consumption average out to 0.5kw.With transformation Absorption is worked off one's feeling vent one's spleen and 1.0% is directly entered a fixed tower of paying and compares, and recovery and rinsing tower weak aqua ammonia reduces 40%, and weak aqua ammonia realizes 0 row substantially Put.
The liquefied ammonia of identical yield is obtained, using the present invention, pressure-swing absorption apparatus investment is reduced, hydrogen and nitrogen gas body damage is reduced Lose, thus reduce the consumption of coal and electric consumption of synthesis ammonia, reduce the weak aqua ammonia amount of sending outside, realize that weak aqua ammonia 0 is discharged substantially, meet The energy-conserving and environment-protective policy that country advocates.

Claims (1)

1. the technique that a kind of conversion gas pressure-variable adsorption combines decarburization with ammoniacal liquor after-purification, it is characterised in that there are conversion gas to be carbonized and set Standby Ammonia Production device, Partial Transformation gas sequentially enters carbonizing apparatus king-tower, Fu Ta, fixed pair of tower, carbon dioxide removal It is referred to as carbon gas to 0.1 ~ 0.2%, Partial Transformation gas enters pressure-swing absorption apparatus decarburization, and outlet gas concentration lwevel control is 0.8 ~ 1.0%, referred to as one-level decarbonization gas, one-level decarbonization gas to be sent to continue without sulphur weak aqua ammonia tower and purify carbon dioxide, the outlet of weak aqua ammonia tower 0.1 ~ 0.2%, referred to as purified gas, carbon gas is mixed into recovery and rinsing tower, nothing with purified gas for gas carbon dioxide concentration control Sulphur weak aqua ammonia tower ammonia concn is controlled in 30 ~ 50 titres, and ammoniacal liquor changes 20 ~ 30% for every eight hours, ammonia temperature control 35 DEG C with Under, send conversion gas carbonizing apparatus weak aqua ammonia groove without sulphur weak aqua ammonia tower carbonated aqueous ammonia.
CN201611181215.3A 2016-12-20 2016-12-20 A kind of conversion gas pressure-variable adsorption and the united technique of ammoniacal liquor after-purification Withdrawn CN106731476A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114195149A (en) * 2021-11-23 2022-03-18 安徽金禾实业股份有限公司 Low-energy-consumption ammonia-carbon separation method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102583439A (en) * 2012-02-08 2012-07-18 浠水县福瑞德化工有限责任公司 Available gas recovery method in ammonia synthesis process
CN106139820A (en) * 2016-07-18 2016-11-23 杨皓 The technique that a kind of conversion gas pressure-variable adsorption combines decarburization with ammonia after-purification

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102583439A (en) * 2012-02-08 2012-07-18 浠水县福瑞德化工有限责任公司 Available gas recovery method in ammonia synthesis process
CN106139820A (en) * 2016-07-18 2016-11-23 杨皓 The technique that a kind of conversion gas pressure-variable adsorption combines decarburization with ammonia after-purification

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114195149A (en) * 2021-11-23 2022-03-18 安徽金禾实业股份有限公司 Low-energy-consumption ammonia-carbon separation method
CN114195149B (en) * 2021-11-23 2024-01-09 安徽金禾实业股份有限公司 Low-energy-consumption ammonia-carbon separation method

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