CN202237765U - Absorption tower applied to ammonia desulphurization - Google Patents
Absorption tower applied to ammonia desulphurization Download PDFInfo
- Publication number
- CN202237765U CN202237765U CN 201120352998 CN201120352998U CN202237765U CN 202237765 U CN202237765 U CN 202237765U CN 201120352998 CN201120352998 CN 201120352998 CN 201120352998 U CN201120352998 U CN 201120352998U CN 202237765 U CN202237765 U CN 202237765U
- Authority
- CN
- China
- Prior art keywords
- ammonia
- circulating pump
- zoneofoxidation
- feed zone
- absorption tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 134
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 66
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 238000005406 washing Methods 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000003647 oxidation Effects 0.000 claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 14
- 239000013505 freshwater Substances 0.000 claims description 34
- 238000006477 desulfuration reaction Methods 0.000 claims description 26
- 230000023556 desulfurization Effects 0.000 claims description 26
- 239000006096 absorbing agent Substances 0.000 claims description 18
- 239000006210 lotion Substances 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 11
- 239000003546 flue gas Substances 0.000 abstract description 11
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052921 ammonium sulfate Inorganic materials 0.000 abstract description 10
- 235000011130 ammonium sulphate Nutrition 0.000 abstract description 10
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 abstract description 9
- 238000002425 crystallisation Methods 0.000 abstract description 6
- 230000008025 crystallization Effects 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 24
- 230000002745 absorbent Effects 0.000 description 13
- 239000002250 absorbent Substances 0.000 description 13
- 238000006213 oxygenation reaction Methods 0.000 description 8
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000003256 environmental substance Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
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- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model relates to an absorption tower applied to ammonia desulphurization, which comprises a tower body. The absorption tower is characterized in that the tower body is divided into a liquid storage stage, an absorption stage, a washing stage and a demisting stage from bottom to top sequentially, the liquid storage stage is divided into a circulating pump feed zone, an ammonia gas adding zone, a drainage zone and an oxidation zone, one channel of an air compressor is directly connected to the oxidation zone while the other channel thereof is converged with an outlet end of an ammonia storage tank and then is connected to the ammonia gas adding zone, the drainage zone is connected to a concentrating tower through a drainage pump, a washing liquid storage tank is connected to a spraying device in the washing stage through the circulating pump of the washing stage, a process water inlet pipeline is connected to the washing liquid storage tank, a return pipeline of the washing stage is divided into two channels, and one channel is connected to the washing liquid storage tank while the other channel is connected to an absorbing section. The absorption tower applied to ammonia desulphurization has the advantages of improving absorption rate and ammonium sulfite oxidation rate, reducing escape volume of ammonia in flue gas, and preventing blocking caused by precipitation from crystallization of ammonium sulfate therein.
Description
Technical field
The utility model relates to a kind of absorption tower that is applied to the ammonia process of desulfurization, belongs to environmental chemical engineering device technique field.
Background technology
Flue gas desulfurization technique is one of basic means of energy-saving and emission-reduction; There are problems in the fire coal boiler fume ammonia-process desulfurization technique so far from exploitation in engineering construction; Be prone to take place ammonium sulfate crystallization obstruction etc. comprising ammonium sulfate removal process complicacy and absorption tower; Therefore, the ammonia process of desulfurization engineering problem that need solve mainly contains:
The first, reduce the escape amount of ammonia:
In the ammonia process of desulfurization, should prevent to generate the white cigarette that ammonium salt mist and sulfuric acid mist are generated, the injection mode of this and ammonia, the pH value of desulfurization degree and absorption liquid is relevant.
The second, the oxidation of ammonium sulfite:
In one-step method reclaim sulfuric acid ammonium technology, in the absorption tower, to carry out
and absorb and sulfite oxidation.In absorbing at
; Ammonium sulfite is the main absorber component of desulfurization; According to principle of absorption; Make desulfurization degree high, just need certain density ammonium sulfite.But from the technological requirement of reclaim sulfuric acid ammonium, the oxygenation efficiency of ammonium sulfite in the absorption tower should be more than 98%.Oxygenation efficiency is high more; The concentration of ammonium sulfite is low more; The ability that absorbent solution absorbs
reduces; Therefore influence desulfurization degree, so desulfurization degree and oxygenation efficiency are mutual restriction.The oxygenation efficiency of ammonium sulfite is relevant with the pH value of absorption liquid in addition, and < 5.6, oxygenation efficiency improves pH.
Three, the crystallization that in the absorption tower, prevents ammonium sulfate is separated out and is caused obstruction.
Summary of the invention
The purpose of the utility model provides a kind of absorption tower, makes its escape amount that can reduce ammonia, reaches desulfurization degree and oxygenation efficiency that industry go up to require, and the crystallization that prevents ammonium sulfate is separated out and caused obstruction.
In order to achieve the above object; The technical scheme of the utility model has provided a kind of absorption tower that is applied to the ammonia process of desulfurization, comprises tower body, it is characterized in that: be divided into liquid storing section, absorber portion, washing section and demist section in the tower body from the bottom to top successively; Liquid storing section is divided into the circulating pump feed zone, gas ammonia adds district, drainage region and zoneofoxidation; Zoneofoxidation and circulating pump feed zone, gas ammonia add between district and the drainage region and the circulating pump feed zone adds with gas ammonia that the part spaced portions is communicated with between the district, the port of export difference two-way of air compressor, and one the tunnel directly is connected to zoneofoxidation; Be connected to gas ammonia after the port of export of another road and ammonia storage tank converges and add the district; The circulating pump feed zone links to each other with sprinkling equipment in being located at absorber portion through circulating pump, and drainage region is connected to concentration tower through positive displacement pump, and the water lotion storage tank is connected to the spray equipment that is positioned at washing section through the washing section circulating pump; The fresh water (FW) inlet pipeline is connected to the water lotion storage tank; The water return pipeline of washing section is divided into two-way, and one the road is connected to the water lotion storage tank, and another road is connected to absorber portion.
Preferably, said fresh water (FW) inlet pipeline is connected to said demist section, is being provided with valve between fresh water (FW) inlet pipeline and the demist section and between fresh water (FW) inlet pipeline and the said water lotion storage tank.
Preferably, the absorption liquid of said zoneofoxidation from the bottom or the top overflow get into said circulating pump feed zone.
Preferably, the absorption liquid of said zoneofoxidation from the bottom or the top overflow get into said gas ammonia and add the district.
Preferably, said gas ammonia adds the district and is communicated with the zone line of said circulating pump feed zone, and two parts separate up and down.
Preferably, the said gas ammonia position that adds district and the said circulating pump feed zone institute connected region position 0.5m at least that is higher than said circulation pump intake piping footpath.
Preferably, the absorption liquid after the oxidation of said zoneofoxidation gets into said drainage region from the bottom, leaves very little a part of area at the top of said drainage region and is used for a small amount of air discharging usefulness that gets into.
Preferably, be higher than and be used to separate said zoneofoxidation and said feed zone and said gas ammonia and add the dividing plate between the district and be used to separate said circulating pump feed zone and add the dividing plate between distinguishing in order to separate dividing plate between said drainage region and the said zoneofoxidation with said gas ammonia.
A kind of advantage that is applied to the absorption tower of the ammonia process of desulfurization that the utility model provides is:
The first, liquid storing section is divided into circulating pump feed zone, gas ammonia adding district, drainage region and zoneofoxidation; Make the pH value of circulation absorbent liquid and the different and scalable of pH value of zoneofoxidation absorbent liquid, finally reach the purpose of raising
absorptivity and sulfite oxidation rate;
The second, be provided with washing section, reduced the escape amount of ammonia in the flue gas thereby flue gas is washed by fresh water (FW);
Three, be provided with concentration tower, ammonium sulfate is carried out evaporative crystallization, the crystallization that in the absorption tower, prevents ammonium sulfate is separated out and is caused obstruction.
Description of drawings
A kind of absorption tower sketch map that is applied to the ammonia process of desulfurization that Fig. 1 provides for the utility model;
Fig. 2 is a liquid storing section subregion sketch map.
The specific embodiment
For making the utility model more obviously understandable, now with a preferred embodiment, and conjunction with figs. elaborates as follows.
In conjunction with Fig. 1 and Fig. 2; A kind of absorption tower that is applied to the ammonia process of desulfurization that the utility model provides comprises tower body 1, is divided into liquid storing section 5, absorber portion 4, washing section 3 and demist section 2 in the tower body 1 from the bottom to top successively; Liquid storing section 5 is divided into circulating pump feed zone I, gas ammonia adds district II, drainage region III and zoneofoxidation IV; Zoneofoxidation IV and circulating pump feed zone I, gas ammonia add between district's II and the drainage region III and circulating pump feed zone I adds with gas ammonia that the part spaced portions is communicated with between district's II, the port of export difference two-way of air compressor 9, and one the tunnel directly is connected to the zoneofoxidation IV; Be connected to gas ammonia after the port of export of another road and ammonia storage tank 8 converges and add district's II; Circulating pump feed zone I links to each other with sprinkling equipment in being located at absorber portion 4 through circulating pump 10, and the drainage region III is connected to concentration tower through positive displacement pump (11), and water lotion storage tank 6 is connected to the spray equipment that is positioned at washing section 3 through washing section circulating pump 7; Fresh water (FW) inlet pipeline one tunnel is connected to water lotion storage tank 6; Another road is connected to demist section 2, is being provided with valve between fresh water (FW) inlet pipeline and the demist section 2 and between fresh water (FW) inlet pipeline and the said water lotion storage tank 6, and the water return pipeline of washing section 3 is divided into two-way; One the road is connected to water lotion storage tank 6, and another road is connected to absorber portion 4.
In conjunction with Fig. 2; The utility model is divided into circulating pump feed zone I, gas ammonia adding district II, drainage region III and zoneofoxidation IV with liquid storing section 5; Both separated in each interval; Can be communicated with again; Make the pH value of circulation absorbent liquid and the different and scalable of pH value of zoneofoxidation absorbent liquid,, each district in the liquid storing section 5 introduced as follows respectively at present to improve
absorptivity and sulfite oxidation rate:
The first, circulating pump feed zone I:
This zone provides required circulation absorbent liquid measure.For preventing that oxygen from getting into the operation that circulating pump feed zone I influences circulating pump, circulating pump feed zone I and zoneofoxidation IV partly separate, and the absorption liquid of zoneofoxidation IV is from the bottom or top overflow entering circulating pump feed zone I.
The second, gas ammonia adds district's II:
After this zone adds ammonia
is regenerated as
; And the pH value of raising absorbent liquid, make absorptivity reach 95%.Gas ammonia adds district's II and partly separates with the zoneofoxidation IV, the absorption liquid of zoneofoxidation IV from the bottom or the top overflow get into gas ammonia and add district's II, and gas ammonia adds and distinguishes II and be communicated with circulating pump feed zone I zone line, and two parts separate up and down, in case short circuit.In addition, be to adopt ammonia-air mixture because ammonia adds, so the gas ammonia absorbent liquid that adds district's II get into circulating pump feed zone I position and should be higher than more than the circulating pump 10 inlet tube path position 0.5m, in case air is to the influence of circulating pump 10 operations.
Three, drainage region III:
This zone provides the ammonium sulfate of delivering to concentration tower.Drainage region III and zoneofoxidation IV partly separate; Absorption liquid after the oxidation gets into from the bottom, gets into the drainage region III from top for reducing absorption liquid simultaneously, and a baffle plate is installed at the top; Retaining goes most area, only leaves very little a part of area and is used for a small amount of air discharging usefulness that gets into.In addition, the dividing plate between drainage region III and the zoneofoxidation IV should be higher than other dividing plates 100mm, in case the overflow of zoneofoxidation IV absorption liquid gets into the drainage region III, this purpose of design is to improve the concentration of ammonium sulfate in the absorption liquid.
Four, zoneofoxidation IV:
This regional ammonium sulfite carries out forced oxidation under bubbling air.Air is supplied with by air compressor 9, sprays in the absorption liquid and carries out forced oxidation through nozzle.Zoneofoxidation IV and gas ammonia add district's II and circulating pump feed zone I major part separates; Only allow the absorption liquid of zoneofoxidation IV to flow into gas ammonia adding district's II and circulating pump feed zone I; And reverse flow can not take place; Make absorption liquid oxidation under lower pH value of zoneofoxidation IV, thereby improved the oxygenation efficiency of ammonium sulfite.
Absorber portion 4 is the spray column structure, as 3 layers of spraying layer are set.
Demist section 2 adopts baffle type mist eliminator or eddy flow plate demister, absorption tower design desulfurization degree 95%, and make the oxygenation efficiency of sulphite reach 98%, deliver to concentration tower by positive displacement pump then and concentrate, to make the ammonium sulfate that is solid.
The course of work of the utility model is:
Desulfurizing agent ammonia by ammonia basin 8 through the gasification after; The gas ammonia of sending into liquid storing section 5 with the air mixing ammonification-air Mixture of air compressor 9 adds district's II; Be mixed into circulation absorbent liquid with absorption liquid; Deliver to absorber portion 4 by circulating pump 10, become drop to contact, remove
in the flue gas with flue gas adverse current through nozzle atomization; Flue gas is sent into chimney through the fresh water (FW) washing of the spray of washing section 3 after demister 2 demists then.
Absorbent liquid absorbs
, and the back flows into the zoneofoxidation IV; Send into the zoneofoxidation IV through the air of air compressor 9 and carry out forced oxidation; A part flows into the drainage region III and delivers to concentration tower by positive displacement pump 11; The a part of gas ammonia that flows into adds district's II preparation absorbent liquid; A part flows into circulating pump feed zone I and absorbent liquid is mixed into circulation absorbent liquid, delivers to absorber portion 4 through circulating pump 10 and carries out desulfurization.
Fresh water (FW) is added to washing section storage tank 6; Through washing section 3, remove ammonia in flue gas by the spray of the nozzle in the washing section 3 by washing section circulating pump 7, the aqueous solution after the washing is collected by column plate and is returned washing section storage tank 6; The part aqueous solution is delivered to absorber portion 4; Replenish fresh water (FW) simultaneously, with the ammonium salt concentration in the control washing section fresh water (FW), flue gas then gets into washing section 3 by riser from absorber portion 4.
Claims (8)
1. absorption tower that is applied to the ammonia process of desulfurization; Comprise tower body (1); It is characterized in that: be divided into liquid storing section (5), absorber portion (4), washing section (3) and demist section (2) in the tower body (1) from the bottom to top successively; Liquid storing section (5) is divided into circulating pump feed zone (I), gas ammonia adds district (II), drainage region (III) and zoneofoxidation (IV); Zoneofoxidation (IV) and circulating pump feed zone (I), gas ammonia add between district's (II) and the drainage region (III) and circulating pump feed zone (I) adds with gas ammonia that the part spaced portions is communicated with between district's (II), the port of export difference two-way of air compressor (9), and one the tunnel directly is connected to zoneofoxidation (IV); Be connected to gas ammonia after the port of export of another road and ammonia storage tank (8) converges and add district's (II); Circulating pump feed zone (I) links to each other with sprinkling equipment in being located at absorber portion (4) through circulating pump (10), and drainage region (III) is connected to concentration tower through positive displacement pump (11), and water lotion storage tank (6) is connected to the spray equipment that is positioned at washing section (3) through washing section circulating pump (7); The fresh water (FW) inlet pipeline is connected to water lotion storage tank (6); The water return pipeline of washing section (3) is divided into two-way, and one the road is connected to water lotion storage tank (6), and another road is connected to absorber portion (4).
2. a kind of absorption tower that is applied to the ammonia process of desulfurization as claimed in claim 1; It is characterized in that: said fresh water (FW) inlet pipeline is connected to said demist section (2), is being provided with valve between fresh water (FW) inlet pipeline and the demist section (2) and between fresh water (FW) inlet pipeline and the said water lotion storage tank (6).
3. a kind of absorption tower that is applied to the ammonia process of desulfurization as claimed in claim 1 is characterized in that: the absorption liquid of said zoneofoxidation (IV) from the bottom or the top overflow get into said circulating pump feed zone (I).
4. a kind of absorption tower that is applied to the ammonia process of desulfurization as claimed in claim 1 is characterized in that: the absorption liquid of said zoneofoxidation (IV) from the bottom or the top overflow get into said gas ammonia and add district's (II).
5. a kind of absorption tower that is applied to the ammonia process of desulfurization as claimed in claim 1 is characterized in that: said gas ammonia adds district's (II) and is communicated with the zone line of said circulating pump feed zone (I), and two parts separate up and down.
6. a kind of absorption tower that is applied to the ammonia process of desulfurization as claimed in claim 1 is characterized in that: the position that said gas ammonia adds district's (II) and said circulating pump feed zone (I) institute connected region is higher than the position 0.5m at least of the inlet caliber of said circulating pump (10).
7. a kind of absorption tower that is applied to the ammonia process of desulfurization as claimed in claim 1; It is characterized in that: the absorption liquid after the oxidation of said zoneofoxidation (IV) gets into said drainage region (III) from the bottom, leaves very little a part of area at the top of said drainage region (III) and is used for a small amount of air discharging usefulness that gets into.
8. a kind of absorption tower that is applied to the ammonia process of desulfurization as claimed in claim 1 is characterized in that: be higher than and be used to separate said zoneofoxidation (IV) and said feed zone (I) and said gas ammonia and add the dividing plate between district's (II) and be used to separate said circulating pump feed zone (I) and add the dividing plate of distinguishing between (II) with said gas ammonia in order to separate dividing plate between said drainage region (III) and the said zoneofoxidation (IV).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120352998 CN202237765U (en) | 2011-09-20 | 2011-09-20 | Absorption tower applied to ammonia desulphurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120352998 CN202237765U (en) | 2011-09-20 | 2011-09-20 | Absorption tower applied to ammonia desulphurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202237765U true CN202237765U (en) | 2012-05-30 |
Family
ID=46099070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120352998 Expired - Fee Related CN202237765U (en) | 2011-09-20 | 2011-09-20 | Absorption tower applied to ammonia desulphurization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202237765U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126507A (en) * | 2015-10-09 | 2015-12-09 | 江苏正通宏泰股份有限公司 | Ultra-clean dust removal device for desulfurizing tower |
| CN106823740A (en) * | 2017-01-23 | 2017-06-13 | 上海大学 | Charcoal element stove, the ammonia process of desulfurization of coke oven flue gas multisection type and dedusting absorption tower |
| US10016721B1 (en) | 2017-05-25 | 2018-07-10 | Jiangnan Environmental Protection Group Inc. | Ammonia-based desufurization process and apparatus |
| US10099170B1 (en) | 2017-06-14 | 2018-10-16 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
-
2011
- 2011-09-20 CN CN 201120352998 patent/CN202237765U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126507A (en) * | 2015-10-09 | 2015-12-09 | 江苏正通宏泰股份有限公司 | Ultra-clean dust removal device for desulfurizing tower |
| CN106823740A (en) * | 2017-01-23 | 2017-06-13 | 上海大学 | Charcoal element stove, the ammonia process of desulfurization of coke oven flue gas multisection type and dedusting absorption tower |
| US10016721B1 (en) | 2017-05-25 | 2018-07-10 | Jiangnan Environmental Protection Group Inc. | Ammonia-based desufurization process and apparatus |
| US10399033B2 (en) | 2017-05-25 | 2019-09-03 | Jiangnan Environmental Protection Group Inc. | Ammonia-based desulfurization process and apparatus |
| US10406478B2 (en) | 2017-05-25 | 2019-09-10 | Jiangnan Environmental Protection Group Inc. | Ammonia-based desulfurization process and apparatus |
| US10413865B2 (en) | 2017-05-25 | 2019-09-17 | Jiangnan Enviromental Protection Group Inc. | Ammonia-based desulfurization process and apparatus |
| US10561982B2 (en) | 2017-05-25 | 2020-02-18 | Jiangnan Environmental Protection Group Inc. | Ammonia-based desulfurization process and apparatus |
| US10099170B1 (en) | 2017-06-14 | 2018-10-16 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| US10159929B1 (en) | 2017-06-14 | 2018-12-25 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| US10583386B2 (en) | 2017-06-14 | 2020-03-10 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| US10589212B2 (en) | 2017-06-14 | 2020-03-17 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20160920 |