CN110124445A - A kind of PSA decarbonated exhaust gas sulfur removal technology - Google Patents
A kind of PSA decarbonated exhaust gas sulfur removal technology Download PDFInfo
- Publication number
- CN110124445A CN110124445A CN201910392925.8A CN201910392925A CN110124445A CN 110124445 A CN110124445 A CN 110124445A CN 201910392925 A CN201910392925 A CN 201910392925A CN 110124445 A CN110124445 A CN 110124445A
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- Prior art keywords
- psa
- desulfurizing agent
- exhaust gas
- sulfur removal
- removal technology
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- 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
- B01D53/26—Drying gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/22—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/304—Hydrogen sulfide
Abstract
A kind of PSA decarbonated exhaust gas sulfur removal technology, comprising the following steps: S1, pairing ammonification product carry out pressure-variable adsorption；S2, hydrogen sulfide and carbon dioxide that desorption parsing generates are drained into high-efficiency precision desulfurizer；Using efficient desulfurizing agent by hydrogen sulfide adsorption in tail gas；S3, it the carbon dioxide of discharge is sent to carbon dioxide recovering apparatus recycles；When efficient desulfurizing agent activity decline after a period of use, desulfurizing agent is regenerated.Desulfurizing agent is regenerated in the technical program, can continuously supplement desulfurizing agent, hydrogen sulfide in tail gas is efficiently and stably continuously adsorbed, and then the carbon dioxide of high-purity can be obtained.
Description
Technical field
The present invention relates to a kind of tail gas disposal technique field more particularly to a kind of PSA decarbonated exhaust gas sulfur removal technologies.
Background technique
PSA (pressure-variable adsorption) decarburization is that have different adsorption capacities under different partial pressures to adsorbate using adsorbent, inhale
Attached speed and adsorption capacity, and the characteristic for having selection to adsorb by isolated admixture of gas each component is added under a certain pressure
Pressure be adsorbed and removed impurities in feed gas component, decompression desorption regenerates adsorbent, whole operation process at room temperature into
Row.Chinese patent CN202139057U pressure-changeable adsorption decarbonization device is mainly applied to Mei Tou enterprise, such enterprise production process
In CO2 relative surplus, hydrogen and nitrogen gas can achieve the higher rate of recovery, but the rate of recovery of CO2 only has 70% or so.Purified gas with
The purity of stripping gas and the rate of recovery of CO2 cannot be taken into account.A kind of pressure-changeable adsorption decarbonization device is provided, can not only be combined net
Change the purity of gas and stripping gas and the rate of recovery of CO2, and is highly suitable for hydrogen and nitrogen gas and the CO2 full recycling simultaneously of Qi Tou enterprise
Using.Chinese patent CN202315636U improves adsorbent reactivation quality for a kind of pressure-changeable adsorption decarbonization device, and extension follows every time
The ring period reduces available gas loss.
Summary of the invention
The object of the present invention is to provide a kind of PSA decarbonated exhaust gas sulfur removal technologies, are able to carry out continuous high-efficient desulfurization.
To realize the above-mentioned technical purpose, the technical solution of the embodiment of the present invention is specific as follows.
A kind of PSA decarbonated exhaust gas sulfur removal technology, comprising the following steps:
S1, pairing ammonification product carry out pressure-variable adsorption；
S2, hydrogen sulfide and carbon dioxide that desorption parsing generates are drained into high-efficiency precision desulfurizer；Using high-efficiency desulfurization
Agent is by hydrogen sulfide adsorption in tail gas；
S3, it the carbon dioxide of discharge is sent to carbon dioxide recovering apparatus recycles；
When efficient desulfurizing agent activity decline after a period of use, desulfurizing agent is regenerated.
Further, the adsorbent of the pressure-variable adsorption includes shell matrix activated carbon, and the shell matrix activated carbon is by gold
Belong to ion modification.
Further, the shell matrix activated carbon passes through CU2+And Mg2+Mixed metal ion modification.
Further, the CU2+And Mg2+Mixed proportion is 7:3-9:1.
Further, the efficient desulfurizing agent is iron oxide based high-temperature coal gas desulfurizing agent.
Further, the regenerative environ-ment parameter of the iron oxide based high-temperature coal gas desulfurizing agent is 300-580 DEG C of temperature, air speed
For 3600-3900h-1, oxygen content 7%-12%.
Further, the high-efficiency precision desulfurizer includes Multistage desulfuration tower, is provided with height in the Multistage desulfuration tower
Imitate desulfurizing agent.
Further, the wherein level-one in the Multistage desulfuration tower is provided with NH4OH and picric acid alkaline aqueous solution.
Further, the carbon dioxide recovering apparatus is followed successively by suspended hood, blower, the first surge tank, more from front to back
Grade compressor, the second surge tank, dust filter unit, absorption tower, refrigerator, flash tank and storage tank, each section are connected by pipeline
It connects, is provided with desiccant in the absorption tower.
Further, the compound compressor is by gas compression to 1-1.5Mpa.
Compared with prior art, this have the advantage that:
A kind of PSA decarbonated exhaust gas sulfur removal technology, comprising the following steps: S1, pairing ammonification product carry out pressure-variable adsorption；S2,
Hydrogen sulfide and carbon dioxide that desorption parsing generates are drained into high-efficiency precision desulfurizer；Using efficient desulfurizing agent by sulphur in tail gas
Change hydrogen absorption；S3, it the carbon dioxide of discharge is sent to carbon dioxide recovering apparatus recycles；When efficient desulfurizing agent uses one section
Activity decline, regenerates desulfurizing agent after time.Desulfurizing agent is regenerated in the technical program, can continuously be mended
Desulfurizing agent is filled, hydrogen sulfide in tail gas is efficiently and stably continuously adsorbed, and then the titanium dioxide of high-purity can be obtained
Carbon.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is PSA decarbonated exhaust gas sulfur removal technology schematic diagram in the embodiment of the present invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, to realize the above-mentioned technical purpose, the technical solution of the embodiment of the present invention is specific as follows.
Embodiment 1
A kind of PSA decarbonated exhaust gas sulfur removal technology, comprising the following steps:
S1, pairing ammonification product carry out pressure-variable adsorption；
S2, hydrogen sulfide and carbon dioxide that desorption parsing generates are drained into high-efficiency precision desulfurizer；Using high-efficiency desulfurization
Agent is by hydrogen sulfide adsorption in tail gas；
S3, it the carbon dioxide of discharge is sent to carbon dioxide recovering apparatus recycles；
When efficient desulfurizing agent activity decline after a period of use, desulfurizing agent is regenerated.
Desulfurizing agent is regenerated in the technical program, can continuously supplement desulfurizing agent, so that vulcanizing in tail gas
Hydrogen efficiently and stably can be adsorbed continuously, and then can obtain the carbon dioxide of high-purity.It is high-purity in the particular embodiment
The carbon dioxide of degree can be further processed into food-grade or technical grade.
It should be noted that the bad measurement of activity of desulfurizing agent, therefore determine desulfurizing agent again according to the flow velocity of processing tail gas
The raw time, flow velocity is faster, and regeneration intervals are shorter.
Preferably, the adsorbent of the pressure-variable adsorption includes shell matrix activated carbon, and the shell matrix activated carbon passes through metal
Ion modification, modified shell matrix activated carbon adsorption effect are more preferable.Experiment shows: CU2+And Mg2+Mixed metal ion modification effect
Fruit is more than CU2+And Mg2+It is used alone.Therefore, the shell matrix activated carbon passes through CU2+And Mg2+Mixed metal ion modification.Into
The experiment of one step shows the CU2+And Mg2+When mixed proportion is 7:3, modified shell matrix activated carbon adsorption effect is preferable.
Preferably, the efficient desulfurizing agent is iron oxide based high-temperature coal gas desulfurizing agent.Experiment shows: the iron-based height of oxidation
The regenerative environ-ment parameter of temperature coal gas desulfurizing agent is 300 DEG C of temperature, air speed 3600h-1, oxygen content 7%, oxidation iron-based high temp
The desulfurization effect of gas desulfurizer is preferable.The desulfurizer regeneration time is 20min in the present embodiment.
Preferably, the high-efficiency precision desulfurizer includes Multistage desulfuration tower, is provided in the Multistage desulfuration tower efficiently
Desulfurizing agent.Wherein level-one in the Multistage desulfuration tower is provided with NH4OH and picric acid alkaline aqueous solution, can efficiently go sulphur removal
Change hydrogen.
Preferably, the carbon dioxide recovering apparatus is followed successively by suspended hood, blower, the first surge tank, multistage from front to back
Compressor, the second surge tank, dust filter unit, absorption tower, refrigerator, flash tank and storage tank, each section are connected by pipeline,
Desiccant is provided in the absorption tower.The compound compressor is by gas compression to 1Mpa.High pressure gas passes through dust-filtering
Device can be out of dust with rapid filtration, and to be unlikely to stall too many and influence subsequent technique for gas.
Embodiment 2
Difference from Example 1 is that the adsorbent of the pressure-variable adsorption includes shell matrix activated carbon, and the shell base is living
Property charcoal by metal ion-modified, modified shell matrix activated carbon adsorption effect is more preferable.Experiment shows: CU2+And Mg2+Mixing gold
Belonging to ion modification effect is more than CU2+And Mg2+It is used alone.Therefore, the shell matrix activated carbon passes through CU2+And Mg2+Mixed metal
Ion modification.Further experiment shows the CU2+And Mg2+When mixed proportion is 8:2, modified shell matrix activated carbon absorption
Effect is preferable.
Preferably, the efficient desulfurizing agent is iron oxide based high-temperature coal gas desulfurizing agent.Experiment shows: the iron-based height of oxidation
The regenerative environ-ment parameter of temperature coal gas desulfurizing agent is 400 DEG C of temperature, air speed 3700h-1, oxygen content 9%, oxidation iron-based high temp
The desulfurization effect of gas desulfurizer is preferable.The desulfurizer regeneration time is 18min in the present embodiment.
Preferably, the carbon dioxide recovering apparatus is followed successively by suspended hood, blower, the first surge tank, multistage from front to back
Compressor, the second surge tank, dust filter unit, absorption tower, refrigerator, flash tank and storage tank, each section are connected by pipeline,
Desiccant is provided in the absorption tower.The compound compressor is by gas compression to 1.2Mpa.High pressure gas passes through dust mistake
Filter can be out of dust with rapid filtration, and to be unlikely to stall too many and influence subsequent technique for gas.
Embodiment 3
Difference from Example 1 is that the adsorbent of the pressure-variable adsorption includes shell matrix activated carbon, and the shell base is living
Property charcoal by metal ion-modified, modified shell matrix activated carbon adsorption effect is more preferable.Experiment shows: CU2+And Mg2+Mixing gold
Belonging to ion modification effect is more than CU2+And Mg2+It is used alone.Therefore, the shell matrix activated carbon passes through CU2+And Mg2+Mixed metal
Ion modification.Further experiment shows the CU2+And Mg2+When mixed proportion is 9:1, modified shell matrix activated carbon absorption
Effect is preferable.
Preferably, the efficient desulfurizing agent is iron oxide based high-temperature coal gas desulfurizing agent.Experiment shows: the iron-based height of oxidation
The regenerative environ-ment parameter of temperature coal gas desulfurizing agent is 580 DEG C of temperature, air speed 3900h-1, oxygen content 12% aoxidizes iron-based height
The desulfurization effect of temperature coal gas desulfurizing agent is preferable.The desulfurizer regeneration time is 16min in the present embodiment.
Preferably, the carbon dioxide recovering apparatus is followed successively by suspended hood, blower, the first surge tank, multistage from front to back
Compressor, the second surge tank, dust filter unit, absorption tower, refrigerator, flash tank and storage tank, each section are connected by pipeline,
Desiccant is provided in the absorption tower.The compound compressor is by gas compression to 1.5Mpa.High pressure gas passes through dust mistake
Filter can be out of dust with rapid filtration, and to be unlikely to stall too many and influence subsequent technique for gas.
Embodiment 4
Difference from Example 1 is that the adsorbent of the pressure-variable adsorption includes shell matrix activated carbon, and the shell base is living
Property charcoal by metal ion-modified, modified shell matrix activated carbon adsorption effect is more preferable.Experiment shows: CU2+And Mg2+Mixing gold
Belonging to ion modification effect is more than CU2+And Mg2+It is used alone.Therefore, the shell matrix activated carbon passes through CU2+And Mg2+Mixed metal
Ion modification.Further experiment shows the CU2+And Mg2+When mixed proportion is 8.5:1.5, modified shell matrix activated carbon
Adsorption effect is best.
Preferably, the efficient desulfurizing agent is iron oxide based high-temperature coal gas desulfurizing agent.Experiment shows: the iron-based height of oxidation
The regenerative environ-ment parameter of temperature coal gas desulfurizing agent is 580 DEG C of temperature, air speed 3900h-1, oxygen content 12% aoxidizes iron-based height
The desulfurization effect of temperature coal gas desulfurizing agent is preferable.The desulfurizer regeneration time is 16min in the present embodiment.
Preferably, the carbon dioxide recovering apparatus is followed successively by suspended hood, blower, the first surge tank, multistage from front to back
Compressor, the second surge tank, dust filter unit, absorption tower, refrigerator, flash tank and storage tank, each section are connected by pipeline,
Desiccant is provided in the absorption tower.The compound compressor is by gas compression to 1.2Mpa.High pressure gas passes through dust mistake
Filter can be out of dust with rapid filtration, and to be unlikely to stall too many and influence subsequent technique for gas.
Embodiment 5
Difference from Example 1 is that the adsorbent of the pressure-variable adsorption includes shell matrix activated carbon, and the shell base is living
Property charcoal by metal ion-modified, modified shell matrix activated carbon adsorption effect is more preferable.Experiment shows: CU2+And Mg2+Mixing gold
Belonging to ion modification effect is more than CU2+And Mg2+It is used alone.Therefore, the shell matrix activated carbon passes through CU2+And Mg2+Mixed metal
Ion modification.Further experiment shows the CU2+And Mg2+When mixed proportion is 8.5:1.5, modified shell matrix activated carbon
Adsorption effect is best.
Preferably, the efficient desulfurizing agent is iron oxide based high-temperature coal gas desulfurizing agent.Experiment shows: the iron-based height of oxidation
The regenerative environ-ment parameter of temperature coal gas desulfurizing agent is 565 DEG C of temperature, air speed 3860h-1, oxygen content 10.5%, aoxidize it is iron-based
The desulfurization effect of desulfurizing agent for high-temp gas is best.The desulfurizer regeneration time is 16min in the present embodiment.
Preferably, the carbon dioxide recovering apparatus is followed successively by suspended hood, blower, the first surge tank, multistage from front to back
Compressor, the second surge tank, dust filter unit, absorption tower, refrigerator, flash tank and storage tank, each section are connected by pipeline,
Desiccant is provided in the absorption tower.The compound compressor is by gas compression to 1.3Mpa.High pressure gas passes through dust mistake
Filter can be out of dust with rapid filtration, and to be unlikely to stall too many and influence subsequent technique for gas.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It both falls in the scope of protection of present invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (10)
1. a kind of PSA decarbonated exhaust gas sulfur removal technology, which comprises the following steps:
S1, pairing ammonification product carry out pressure-variable adsorption；
S2, hydrogen sulfide and carbon dioxide that desorption parsing generates are drained into high-efficiency precision desulfurizer；It will using efficient desulfurizing agent
Hydrogen sulfide adsorption in tail gas；
S3, it the carbon dioxide of discharge is sent to carbon dioxide recovering apparatus recycles；
When efficient desulfurizing agent activity decline after a period of use, desulfurizing agent is regenerated.
2. PSA decarbonated exhaust gas sulfur removal technology as described in claim 1, which is characterized in that the adsorbent packet of the pressure-variable adsorption
Shell matrix activated carbon is included, the shell matrix activated carbon is by metal ion-modified.
3. PSA decarbonated exhaust gas sulfur removal technology as claimed in claim 2, which is characterized in that the shell matrix activated carbon passes through CU2+
And Mg2+Mixed metal ion modification.
4. PSA decarbonated exhaust gas sulfur removal technology as claimed in claim 3, which is characterized in that the CU2+And Mg2+Mixed proportion is
7:3-9:1.
5. PSA decarbonated exhaust gas sulfur removal technology as described in claim 1, which is characterized in that the efficient desulfurizing agent is iron oxide
Based high-temperature coal gas desulfurizing agent.
6. PSA decarbonated exhaust gas sulfur removal technology as claimed in claim 5, which is characterized in that the iron oxide based high-temperature coal gas is de-
The regenerative environ-ment parameter of sulphur agent is 300-580 DEG C of temperature, air speed 3600-3900h-1, oxygen content 7%-12%.
7. PSA decarbonated exhaust gas sulfur removal technology as described in claim 1, which is characterized in that the high-efficiency precision desulfurizer includes
Multistage desulfuration tower is provided with efficient desulfurizing agent in the Multistage desulfuration tower.
8. PSA decarbonated exhaust gas sulfur removal technology as claimed in claim 7, which is characterized in that in the Multistage desulfuration tower wherein
Level-one is provided with NH4OH and picric acid alkaline aqueous solution.
9. PSA decarbonated exhaust gas sulfur removal technology as described in claim 1, which is characterized in that the carbon dioxide recovering apparatus from
Front to back is followed successively by suspended hood, blower, the first surge tank, compound compressor, the second surge tank, dust filter unit, absorption tower, cold
Jelly machine, flash tank and storage tank, each section are connected by pipeline, are provided with desiccant in the absorption tower.
10. PSA decarbonated exhaust gas sulfur removal technology as described in claim 1, which is characterized in that the compound compressor is by gas pressure
It is reduced to 1-1.5Mpa.
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| CN113648782A (en) * | 2021-10-19 | 2021-11-16 | 德仕能源科技集团股份有限公司 | Carbon dioxide recovery device and carbon dioxide recovery method |
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