CN201006395Y - Tower-shaped desulfurising reactor for reclaiming sulfur dioxide from flue gas by using ammonia as raw material - Google Patents
Tower-shaped desulfurising reactor for reclaiming sulfur dioxide from flue gas by using ammonia as raw material Download PDFInfo
- Publication number
- CN201006395Y CN201006395Y CNU200720067023XU CN200720067023U CN201006395Y CN 201006395 Y CN201006395 Y CN 201006395Y CN U200720067023X U CNU200720067023X U CN U200720067023XU CN 200720067023 U CN200720067023 U CN 200720067023U CN 201006395 Y CN201006395 Y CN 201006395Y
- Authority
- CN
- China
- Prior art keywords
- ammonium
- flue gas
- ammonia
- coupled zone
- raw material
- 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
Images
Abstract
The utility model relates to a desulfurizing reactor, in particular to a tower combined desulfurizing reactor which uses ammonia to recycle SO<2> of smoke, comprising a casing (1), characterized in further composed of a smoke temperature reduction and SO<2> adsorption couple area (2) at the inner upper portion of the casing (1), and a sub sulfur ammonia oxidization and sulfur ammonia crystallization couple area (3) under the area (2). The utility model is characterized in that the humidification temperature reduction of hot smoke and SO<2> adsorption are coupled in the upper area of the reactor, the sub sulfur ammonia oxidization and sulfur ammonia crystallization are coupled at the lower area of the reactor, thereby improving utilization, reducing cost and reducing energy consumption. The utility model uses ammonia, water and air as material, while the product is solid sulfur ammonia, without secondary pollution.
Description
Technical field
The utility model relates to a kind of desulfurization reactor.
Background technology
The method of flue gas desulfurization is a lot, and the difference according to the kind of the desulfurization material that adopts can be divided into diverse ways.
With ammonia is raw material, and absorption method reclaims the SO in the flue gas
2, be a kind of typical absorption method, many patent disclosures said absorption method and desulfurization reactor, as Chinese patent ZL99113403.6, ZL02133906.2 and ZL02266994.9 and U.S. Pat P5362458, USP6221325, USP6187278 etc., industrial actual showing, the method for above-mentioned patent disclosure and desulfurization reactor are though can reach higher desulfurized effect, but, also exist investment high, energy consumption is big, the insoluble defective of anticorrosion problem.Therefore, what developmental research was new is raw material with ammonia, and absorption method reclaims the SO in the flue gas
2Desulfurization reactor, become the problem that relevant field is extremely paid close attention to.
Summary of the invention
The utility model technical issues that need to address are that disclosing a kind of is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, to overcome the above-mentioned defective that prior art exists.
Of the present utility model is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, comprising:
Housing;
Be arranged on the flue gas cool-down and the SO of housing internal upper part
2Absorb the coupled zone; Said flue gas cool-down and SO
2Absorb the coupled zone and comprise the absorption liquid spray atomizing member that is connected with circulating absorption solution that is arranged on housing top and ammonia inlet;
Be arranged on flue gas cool-down and SO
2Absorb the ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone of below, coupled zone;
Be arranged on flue gas cool-down and SO
2Absorb the exhanst gas outlet between coupled zone and ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone:
Be arranged on the demarcation strip that constitutes by straight plate and flap of a side in ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone, said flap and inner walls are sealedly and fixedly connected, straight plate inserts in ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone, is stillness of night district between straight plate and the inner walls; Straight plate bottom is the magma district;
Be arranged on the sulphur ammonium slurry outlet on magma district, straight plate bottom, the housing;
Be arranged on the air intake at ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone middle part;
Be arranged on the circulating absorption solution outlet at place, stillness of night district;
Be arranged on the mother liquor inlet on ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone, flap top;
Be arranged on the smoke inlet of case top;
Be arranged on flue gas cool-down and SO
2Absorb the circulating absorption solution inlet on top, coupled zone;
Be arranged on flue gas cool-down and SO
2Absorb the additional fresh water (FW) inlet of bottom, coupled zone;
Unique distinction of the present utility model is: the humidifying cooling of hot flue gas and SO
2Absorbing two functions is coupling in the zone, improved the utilization ratio of equipment, can reduce investment outlay, two functions of ammonium sulfurous oxidation and sulphur crystalline ammonium are coupling in the lower area of desulfurization reactor, and oxidation and crystallization are carried out simultaneously, make full use of the time of staying that oxidation reactor needs, also provide enough time of staying for the sulphur crystalline ammonium, and guarantee to obtain oarse-grained sulphur ammonium crystal, not only reduce investment outlay, also energy efficient.
Because the combination of above four functions has finally formed a combined type desulfurization reactor.In addition, this desulfurization reactor also has one characteristics: the elevated temperature heat flue gas enters from reactor head, with absorption liquid in reactor and stream contact, do not have the speed limit that exists in the conventional desulfurization reactor and serious liquid foam entrainment problem.The utility model is for whole desulphurization system, and desulfurization material (charging) is ammonia, water and air, and desulfurization product is a solid ammonium sulfate, does not produce any type of new waste water, waste residue and waste gas.In a word, this invention is turned waste into wealth, and turns harm into good, and does not produce secondary pollution.
Description of drawings
Fig. 1 is a tower shape combined type desulfurization reactor structural representation.
The specific embodiment
Referring to Fig. 1, of the present utility model is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor comprise:
Housing 1;
Be arranged on the flue gas cool-down and the SO of housing 1 internal upper part
2Absorb coupled zone 2;
Said flue gas cool-down and SO
2Absorb coupled zone 2 and comprise the absorption liquid spray atomizing member that is connected with circulating absorption solution that is arranged on housing 1 top and ammonia inlet 101, said absorption liquid spray atomizing member preferred nozzle 13; Said nozzle 13 preferred spiral nozzles promptly are provided with screw thread in nozzle 13, nozzle 13 internal diameters are 10-100mm, the amount decision of the absorption liquid that the quantity of nozzle 13 can be handled as required, and each nozzle liquid spray flux is 10-100m
3/ h, the nozzle material is the abrasion-proof corrosion-proof corrosion material, comprises SiSiC, pottery, Polyurethane, poly-tetrafluoro and ultra-high molecular weight polyethylene etc., wherein preferred SiSiC, pottery and Polyurethane.The quantity of nozzle is by each nozzle liquid spray flux 10-100m
3/ h, nozzle inside diameter 10-100mm determines.The sprinkle density of absorption liquid is at 10-200m
3/ m
2/ h is preferably at 20-80m
3/ m
2Between/the h;
Be arranged on flue gas cool-down and SO
2Absorb the ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone 3 of 2 belows, coupled zone;
Be arranged on flue gas cool-down and SO
2Absorb the exhanst gas outlet 103 between coupled zone 2 and ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone 3;
Be arranged on the demarcation strip that constitutes by straight plate 301 and flap 302 of a side in ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone 3, said flap 302 is fixedlyed connected with housing 1 inner wall sealing, straight plate 301 inserts in ammonium sulfurous oxidations and the sulphur crystalline ammonium coupled zone 3, is stillness of night district 303 between straight plate 301 and housing 1 inwall; Straight plate 301 bottoms are magma district 304, the stillness of night district 303 and magma district 304 play the sieving actoion of crystalline solid, make bulky grain concentrate on magma district 304, fine grained concentrates on stillness of night district 303, the magma district is taken from the discharging of sulphur ammonium;
Be arranged on the sulphur ammonium slurry outlet 104 on magma district, straight plate 301 bottom 304, the housing 1;
Be arranged on the air intake 105 at ammonium sulfurous oxidation and 3 middle parts, sulphur crystalline ammonium coupled zone;
Be arranged on the circulating absorption solution outlet 106 at 303 places, stillness of night district;
Be arranged on the mother liquor inlet 107 on ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone 3, flap 302 tops;
Be arranged on the smoke inlet 105 at housing 1 top;
Be arranged on flue gas cool-down and SO
2Absorb the additional fresh water (FW) inlet 102 of 2 bottoms, coupled zone, technology supplementing water inlet also can be arranged on flue gas cool-down and SO
2Absorb 2 tops, coupled zone;
The utility model also can be at flue gas cool-down and SO
2The absorption liquid spray atomizing member below that absorbs coupled zone 2 is provided with mass transfer elements, and said mass transfer elements is selected from filler, comprises grid packing, random packing or ripple packing;
The utility model can not load material, relies on the external surface area of the drop of spraying generation to carry out gas-liquid mass transferring fully.Do not having under the filler situation, when sprinkle density is 20m
3/ m
2/ h is corresponding to filling area 20m
2/ m
3For 80m
2/ m
3The filler of specification is 80m corresponding to packless sprinkle density
3/ m
2/ h.For conventional desulfurization reactor, be equivalent to liquid/gas than being 6-7 liter/m
3And conventional liquid-gas ratio is at 10-15, corresponding to the area of standard filler at 140-200m
2/ m
3Therefore, when not loading material, its sprinkle density is bigger, and the absorption liquid circulatory system comprises the investment of pump, nozzle, pipeline and valve, and the circulation power consumption is all bigger.Behind the filling material, sprinkle density can significantly reduce, and the investment and the energy consumption of the absorption liquid circulatory system are lower, but needs to increase the investment of filler.But total says, adopts the advantage of filler more more.
Preferably, be provided with the air sparger that is connected with air intake 105, the air that enters reactor is distributed in ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone 3;
Preferably, the top of ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone 3 is provided with the sieve plate or the screen of perforate, the quantity of sieve plate or screen is 3～5, and reactor is divided into the 3-5 level, and the liquid that contains ammonium sulfurous from top to bottom, air from the bottom up, form adverse current, form multistage bubbling oxidation reaction device, reaching under the situation of same 90% oxidation efficiency, the oxidation reactor volume can reduce 50-80%.
When oxidation takes place, the sulphur crystalline ammonium also will take place.Crystallization itself also is equivalent to a chemical reaction, and therefore, multistage bubbling reactor structure also helps crystallization reaction.Increase reaction speed, improve the uniformity of crystalline solid granularity.At the bottommost of desulfurization reactor, lump in the bottom simultaneously, be provided with agitating device in the bottom of ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone 3 in order to prevent crystal deposition;
Preferably, sulphur ammonium slurry outlet 104 is 0.1-1.0m with the distance of ammonium sulfurous oxidation and 3 bottoms, sulphur crystalline ammonium coupled zone, the circulating absorption solution that absorbs sulfur dioxide is taken from clear liquid area 303, the circulating absorption solution outlet is 3-10m with the distance of sulphur ammonium slurry outlet 104, in the reaction crystalizer of this structure, can obtain 100 microns-1000 microns crystalline solid, be very beneficial for separation, drying, packing and the application of sulphur ammonium.
Tower shape combined type desulfurization reactor of the present utility model, can be used for ammonia is the flue gas desulfurization of raw material: with SO
2Concentration is 1000-10000mg/Nm
3, temperature is 100-180 ℃ the SO that contains
2Boiler smoke enters flue gas cool-down and SO from the smoke inlet 105 at combined type desulfurization reactor 1 top
2Absorb coupled zone 2, and contact by the said absorption liquid spray atomizing member spray absorption liquid that contains ammonia down, and under flowing to, flue gas cool-down, while SO wherein
2Be absorbed;
Flue gas leaves flue gas cool-down and SO
2After absorbing coupled zone 2, leave desulfurization reactor from exhanst gas outlet 103, by the foam removal member, leave desulphurization system through after the foam removal, row is to chimney.
Absorption liquid leaves flue gas cool-down and SO
2After absorbing coupled zone 2, enter ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone 3, carry out oxidation reaction with the air that blasts from air intake 105, the air oxidation that the ammonium sulfurous of generation is blasted is the sulphur ammonium, increase the sulphur ammonium concentration in the absorption liquid simultaneously, the oxidized SO that also promoted of ammonium sulfurous
2Absorption, make chemical reaction in the liquid phase towards helping SO
2The direction that absorbs is carried out.Along with the carrying out of time, ammonium sulfate concentrations constantly increases, and meets and exceeds its saturated concentration.Owing to contain flyash in the absorption liquid, can be used as the nucleus of sulphur crystalline ammonium, ammonium sulfate can be separated out in crystallization.After the concentration of sulphur ammonium in absorption liquid surpassed to a certain degree, sulphur ammonium crystal can steady growth.Therefore, the startup procedure of sweetening process is exactly that ammonium sulfate accumulates in absorption liquid, and the concentration that reaches capacity begins to separate out crystal, and grows up to the process of big crystal at last.
Circulating absorption solution takes out from stillness of night district's circulating absorption solution of 303 outlet 106, carries and enters flue gas cool-down and SO after initiate ammonia mixes through circulating pump
2Absorb coupled zone 2 and contact, absorb the SO in the flue gas with the flue gas that newly enters
2, obtain new ammonium sulfite, enter " oxidizing and crystallizing district " again, be oxidized to the sulphur ammonium again, and so constantly circulation is separated out in crystallization;
Sulphur ammonium slip takes out from sulphur ammonium slurry outlet 104, be transported to sulphur ammonium separator, adopt conventional method, separated and collected solid particle wherein, be commodity sulphur ammonium, the mother liquor after the separation is sent ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone 3 back to by the mother liquor inlet 107 on ammonium sulfurous oxidation and 3 tops, sulphur crystalline ammonium coupled zone; The technology supplementing water enters reactor by additional fresh water (FW) inlet 102.
Claims (10)
1. one kind is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, comprise housing (1), it is characterized in that, also comprise:
Be arranged on the flue gas cool-down and the SO of housing (1) internal upper part
2Absorb coupled zone (2);
Said flue gas cool-down and SO
2Absorb coupled zone (2) and comprise the absorption liquid spray atomizing member that is connected with circulating absorption solution that is arranged on housing (1) top and ammonia inlet (101);
Be arranged on flue gas cool-down and SO
2Absorb the ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone (3) of below, coupled zone (2);
Be arranged on flue gas cool-down and SO
2Absorb the exhanst gas outlet (103) between coupled zone (2) and ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone (3);
Be arranged on the demarcation strip by straight plate (301) and flap (302) formation of a side in ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone (3), said flap (302) is fixedlyed connected with housing (1) inner wall sealing, straight plate (301) inserts in ammonium sulfurous oxidation and the sulphur crystalline ammonium coupled zone (3), be stillness of night district (303) between straight plate (301) and housing (1) inwall, straight plate (301) bottom is magma district (304);
Be arranged on the sulphur ammonium slurry outlet (104) on straight plate magma district, 301 bottom (304), the housing (1);
Be arranged on the air intake (105) at ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone (3) middle part;
Be arranged on the circulating absorption solution outlet of locating in stillness of night district (303) (106);
Be arranged on the mother liquor inlet (107) on ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone (3), flap (302) top;
Be arranged on the smoke inlet (105) at housing (1) top;
Be arranged on flue gas cool-down and SO
2Absorb the additional fresh water (FW) inlet (102) of bottom, coupled zone (2).
2. according to claim 1 is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, it is characterized in that, at flue gas cool-down and SO
2The absorption liquid spray atomizing member below that absorbs coupled zone (2) is provided with mass transfer elements.
3. according to claim 2 is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, it is characterized in that said mass transfer elements is selected from filler, comprise grid packing, random packing or ripple packing.
4. according to claim 1 is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, it is characterized in that, be provided with the air sparger that is connected with air intake (105) in ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone (3).
5. according to claim 1 is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, it is characterized in that the top of ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone (3) is provided with the sieve plate or the screen of perforate.
6. according to claim 1 is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, it is characterized in that, be provided with agitating device in the bottom of ammonium sulfurous oxidation and sulphur crystalline ammonium coupled zone (3).
7. according to claim 1 is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, it is characterized in that, sulphur ammonium slurry outlet (104) is 0.1-1.0m with the distance of ammonium sulfurous oxidation and bottom, sulphur crystalline ammonium coupled zone (3), and said circulating absorption solution outlet is 3-10m with the distance of sulphur ammonium slurry outlet (104).
8. according to claim 1 is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, it is characterized in that said absorption liquid spray atomizing member is nozzle (13).
9. according to claim 8 is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, it is characterized in that said nozzle (13) is a spiral nozzle.
10. according to claim 9 is that raw material reclaims SO in the flue gas with ammonia
2Tower shape combined type desulfurization reactor, it is characterized in that nozzle (13) internal diameter is 10-100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720067023XU CN201006395Y (en) | 2007-02-05 | 2007-02-05 | Tower-shaped desulfurising reactor for reclaiming sulfur dioxide from flue gas by using ammonia as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720067023XU CN201006395Y (en) | 2007-02-05 | 2007-02-05 | Tower-shaped desulfurising reactor for reclaiming sulfur dioxide from flue gas by using ammonia as raw material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201006395Y true CN201006395Y (en) | 2008-01-16 |
Family
ID=39002339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720067023XU Expired - Fee Related CN201006395Y (en) | 2007-02-05 | 2007-02-05 | Tower-shaped desulfurising reactor for reclaiming sulfur dioxide from flue gas by using ammonia as raw material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201006395Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786427A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | Flue gas desulfurization regenerates integrated tower and Regeneratable wet fuel gas desulfurizing technology |
-
2007
- 2007-02-05 CN CNU200720067023XU patent/CN201006395Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786427A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | Flue gas desulfurization regenerates integrated tower and Regeneratable wet fuel gas desulfurizing technology |
| CN108786427B (en) * | 2017-05-02 | 2020-11-10 | 中国石油化工股份有限公司 | Flue gas desulfurization and regeneration integrated tower and renewable wet flue gas desulfurization process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN200998639Y (en) | Concentrated crystallization and absorbed oxidation combined type ammonia process desulfuration tower | |
| CN102850092B (en) | Technology for producing ammonium sulfate fertilizer through desulfurizing smoke by ammonia process, and apparatus thereof | |
| CN204841409U (en) | High -efficient gradual change is compound desulfurizing tower in grades | |
| CN201454396U (en) | Spray-type desulfurization tower with integrated absorption, oxidation, crystallization, mist elimination and temperature reduction | |
| CN100534583C (en) | Sulphur dioxide in flue gas recovering method and device with ammonia as material | |
| CN207324482U (en) | Ammonia process multi-region Two-way Cycle multi-pollutant minimum discharge technique | |
| CN104107632A (en) | Spouted bed type reactor for semi-dry flue gas desulfurization and multi-stage desulfurization using thereof | |
| CN101433798B (en) | High-efficient wet-type ammonia recovering method desulfuration method with oxidation and concentration processes outside tower and device thereof | |
| CN101306317A (en) | Tower top discharge type flue gas desulfurization method | |
| CN103203175B (en) | Flue gas desulfurization and denitration process and device for recovering ammonium sulfate | |
| CN101502753A (en) | Ammonia process two-stage countercurrent smoke-discharging and treating device, and method thereof | |
| CN102350198A (en) | Flue gas baffling double-slurry pool absorbing tower | |
| CN101428196A (en) | In-hollow column intercrystalline ammonia process of desulfurization, recovery system and method thereof | |
| CN105771591A (en) | Graded tower internal crystallization ammonia-process desulfurization method | |
| CN101745299B (en) | Method and apparatus for capturing CO2 in flue gas by utilizing three-phase circulating fluidized bed and ammonia | |
| CN101757844A (en) | Method and device for performing flue gas desulfurization by using ammonia process | |
| CN101862582A (en) | Separation tower type boiler flue gas desulfurization process | |
| CN1981914A (en) | Apparatus for treating flue gas using single-stage gas dispersing tray | |
| CN102580504A (en) | Novel ammonia desulphurization absorption device | |
| CN202506306U (en) | Novel ammonia process desulfurization absorption device | |
| CN201006395Y (en) | Tower-shaped desulfurising reactor for reclaiming sulfur dioxide from flue gas by using ammonia as raw material | |
| CN101791513A (en) | Jacking-type exhaust-gas treatment device and method | |
| CN101549254A (en) | Jacking flue gas processing device and method | |
| CN201664576U (en) | Apparatus for removing sulfur dioxide in flue gas by ammonia water | |
| CN101837235B (en) | Low-consumption high-efficiency boiler flue gas desulfurization process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenchuan Environment Protection Science and Technology Co., Ltd., Shanghai Assignor: Lou Aijuan Contract fulfillment period: 2009.2.8 to 2011.2.8 Contract record no.: 2009310000011 Denomination of utility model: Tower-shaped desulfurising reactor for reclaiming sulfur dioxide from flue gas by using ammonia as raw material Granted publication date: 20080116 License type: Exclusive license Record date: 20090225 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.2.8 TO 2011.2.8; CHANGE OF CONTRACT Name of requester: SHENCHUAN ENVIRONMENT PROTECTION TECH CO., LTD., S Effective date: 20090225 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenchuan Environment Protection Science and Technology Co., Ltd., Shanghai Assignor: Lou Aijuan Contract fulfillment period: 2009.4.9 to 2016.4.9 Contract record no.: 2009310000102 Denomination of utility model: Tower-shaped desulfurising reactor for reclaiming sulfur dioxide from flue gas by using ammonia as raw material Granted publication date: 20080116 License type: Exclusive license Record date: 20090619 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.4.9 TO 2016.4.9; CHANGE OF CONTRACT Name of requester: SHENCHUAN ENVIRONMENT PROTECTION TECH CO., LTD., S Effective date: 20090619 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080116 Termination date: 20150205 |
|
| EXPY | Termination of patent right or utility model |