CN203725010U - Staged washing flue gas wet-desulphurization device - Google Patents
Staged washing flue gas wet-desulphurization device Download PDFInfo
- Publication number
- CN203725010U CN203725010U CN201420105431.XU CN201420105431U CN203725010U CN 203725010 U CN203725010 U CN 203725010U CN 201420105431 U CN201420105431 U CN 201420105431U CN 203725010 U CN203725010 U CN 203725010U
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- China
- Prior art keywords
- absorption tower
- flue gas
- slurries
- slurry
- washing
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- 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 - Lifetime
Links
- 238000005406 washing Methods 0.000 title claims abstract description 71
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000003546 flue gas Substances 0.000 title claims abstract description 54
- 239000002002 slurry Substances 0.000 claims abstract description 183
- 238000010521 absorption reaction Methods 0.000 claims abstract description 82
- 238000005507 spraying Methods 0.000 claims abstract description 43
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 22
- 239000010440 gypsum Substances 0.000 claims abstract description 22
- 239000007921 spray Substances 0.000 claims description 28
- 239000000779 smoke Substances 0.000 claims description 12
- 230000003647 oxidation Effects 0.000 claims description 11
- 238000007254 oxidation reaction Methods 0.000 claims description 11
- 238000001179 sorption measurement Methods 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 abstract description 9
- 238000006477 desulfuration reaction Methods 0.000 description 19
- 230000023556 desulfurization Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 239000007787 solid Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 239000011505 plaster Substances 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 238000005201 scrubbing Methods 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- SEPPVOUBHWNCAW-FNORWQNLSA-N (E)-4-oxonon-2-enal Chemical compound CCCCCC(=O)\C=C\C=O SEPPVOUBHWNCAW-FNORWQNLSA-N 0.000 description 1
- LLBZPESJRQGYMB-UHFFFAOYSA-N 4-one Natural products O1C(C(=O)CC)CC(C)C11C2(C)CCC(C3(C)C(C(C)(CO)C(OC4C(C(O)C(O)C(COC5C(C(O)C(O)CO5)OC5C(C(OC6C(C(O)C(O)C(CO)O6)O)C(O)C(CO)O5)OC5C(C(O)C(O)C(C)O5)O)O4)O)CC3)CC3)=C3C2(C)CC1 LLBZPESJRQGYMB-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a staged washing flue gas wet-desulphurization device, particularly a staged washing absorption tower, wherein an absorption tower slurry tank (1) is arranged at the bottom of the absorption tower; a primary slurry spraying layer (3) is arranged above the absorption tower slurry tank (1); a tower top defogger (8) is arranged at the top of the absorption tower; one or more spraying washing layers are arranged between the primary slurry spraying layer (3) and the tower top defogger (8); an absorption tower flue gas inlet (2) is formed in the bottom of the absorption tower, and an absorption tower flue gas outlet (15) is formed in the top of the absorption tower; the absorption tower is provided with a gypsum discharge pipe and an absorption tower intake pipe; a slurry circulation pipe is arranged between the absorption tower slurry tank (1) and the primary slurry spraying layer (3); a circulating slurry tank (10) is arranged on one side of the absorption tower and is connected with the spraying washing layer through a pipeline. According to the technology, slurry is divided, SO2-containing flue gas is secondarily washed and even washed in multiple stages by slurry with a high pH value after being primarily washed by slurry with low pH value, and the desulphurization efficiency can reach more than 99.5 percent.
Description
Technical field
The utility model relates to flue gas desulfurization technique field, relates in particular to a kind of wet flue gas desulfurizer of classification washing.
Background technology
At present, China is more and more stricter to the environmental requirement in thermal power plant, and fossil-fuel power plant atmospheric pollutant emission standard further improves, and the desulfurization emission reduction tasks that thermal power generation unit faces is severe all the more.According to the < < of national environmental protection portion fossil-fuel power plant atmospheric pollutant emission standard > > (GB13223-2011); the existing desulfurizer of most of thermal power plants all can not meet new emission request, need to carry out technological innovation and technology to existing desulfur technology and substitute.
Traditional washing type calcium base wet-process desulfur technology mainly adopts the washing slurries containing absorbent to carry out circulation cleaning to flue gas, containing SO
2former flue gas directly enter in absorption tower after once washing, the flue gas after washing is just through demister, clean flue, smoke stack emission, reacted gypsum slurries directly enters the equipment such as cyclone, vacuum belt dewaterer and removes moisture, separates out gypsum crystal.SO in the method in flue gas
2only, through a spray washing, in the rational situation of Technological Economy, desulfuration efficiency is subject to multiple parameter restriction, is difficult to operation steady in a long-term when desulfuration efficiency 97.5% is above.In addition, along with increasing of desulfuration efficiency, the pH value of slurries also can increase, and causes gypsum crystallization difficulty, and finished product gypsum moisture content is high, is difficult to reach qualified requirement, is unfavorable for comprehensive utilization.
Utility model content
The utility model provides the calcium base wet-process flue gas desulfurization device of a kind of classification washing, for solving that existing calcium base wet-process desulfur technology maybe cannot reach very high desulfuration efficiency or gypsum moisture content is high or technical problem to ature of coal bad adaptability.
The technical scheme that the utility model is taked is:
The wet flue gas desulfurizer of classification washing of the present utility model is a classification washing absorption tower; the bottom on this absorption tower is provided with absorption tower stock tank; up be provided with again one-level slurries spraying layer; top is provided with tower top demister; between one-level slurries spraying layer and tower top demister, be provided with one or more spray washing layer; described spray washing layer is comprised of slurries spraying layer and slurry collecting disc, and slurries spraying layer is positioned at slurry collecting disc top; The bottom of classification washing absorption tower is provided with adsorption tower smoke entrance, and top is provided with adsorption tower smoke outlet; Classification washing absorption tower is provided with gypsum discharge pipe and absorption tower air inlet pipe; Between absorption tower stock tank and one-level slurries spraying layer, be provided with slurries circulation pipe; One side of classification washing absorption tower is provided with loop slurry case, and loop slurry case is connected with spray washing layer by pipeline.
Slurries circulation pipe is provided with one-level circulation slurry pump, and gypsum discharge pipe is provided with gypsum excavationg pump, and absorption tower air inlet pipe is provided with absorption tower oxidation fan.
Loop slurry case bottom is provided with loop slurry case air inlet pipe, and air inlet pipe is provided with loop slurry case oxidation fan.
Loop slurry case outside is provided with slurries circulating line, and slurries circulating line is provided with slurries Turo pump and slurries rotational flow station.
Loop slurry case outside has respectively pipeline to connect slurries spraying layer and the slurry collecting disc of spray washing layer, on the pipeline that connects slurries spraying layer, is provided with loop slurry case circulation slurry pump.
The degree of depth of absorption tower stock tank is to meet the slurries stay cycle height of 5 minutes or gypsum discharge desired height of 5 hours time of staying.
The distance of one-level slurries spraying layer at the bottom of apart from absorption tower is stock tank height and meets flue gas and be not less than the desired height sum of 3.5s in uptake zone, the absorption tower time of staying.
Spray washing layer slurry collecting disc is not less than 2m from the distance of one-level slurries spraying layer, the distance of spray washing leafing tower top demister is not less than 2m, and in spray washing floor, the distance of slurries spraying layer and slurry collecting disc meets flue gas at the desired height of spray washing district time of staying 3s.
The distance of tower top demister and tower top is not less than 0.5m.
Absorption tower stock tank and one-level slurries spraying layer form one-level and absorb scrubbing section, then the slurries spraying layer in each spray washing layer up and slurry collecting disc formation secondary absorption scrubbing section, and three grades absorb scrubbing sections, by that analogy.
The several requirements of processing according to flue gas of scrubbing stage and the performance indications that adopt require to determine.
The sprayed slurry of bottom, described absorption tower is provided by absorption tower stock tank, and gets back to absorption tower stock tank and recycle, and this cycles through circulation slurry pump and realizes.
Stock tank interior slurry solid content in described absorption tower is discharged a certain amount of slurries by gypsum excavationg pump and is guaranteed that slurry solid content maintains between 12% ~ 18%, by absorption tower oxidation fan, to absorption tower stock tank, blast air simultaneously the accessory substance after desulfurization is fully oxidized, obtain conforming with the desulfurated plaster of quality requirements.
The required sprayed slurry of described spray washing layer provided by the external loop slurry case in absorption tower, slurries after washing are got back to loop slurry case through the slurry collecting disc collection in absorption tower and are recycled, and this cycles through loop slurry case circulation slurry pump and realizes.
The loop slurry of loop slurry case is controlled slurry solid content between 10% ~ 18% by slurries Turo pump and slurries rotational flow station, by loop slurry case oxidation fan, to loop slurry case, blast air simultaneously the accessory substance after desulfurization is fully oxidized, prevent loop slurry fouling in catch tray and loop slurry case.
Described slurries rotational flow station can regulate the solid content of slurries in absorption tower stock tank and loop slurry case, and when loop slurry case solid content is lower than design during solid content, overflow slurry flows to absorption tower stock tank, and underflow slurries are got back to loop slurry case; When loop slurry case solid content is higher than design during solid content, underflow slurries flow to absorption tower stock tank, and overflow slurry is got back to loop slurry case.
The washing slurries of described different pH values adopt the method for slurries subregion to obtain.The washing slurries of low pH value are collected in the stock tank of absorption tower, and the washing slurries of high pH value are collected in the loop slurry case outside tower by slurry collecting disc in tower, realize the subregion of height pH value sprayed slurry and collect.
The desulfurization degree of described two-stage washing absorption tower apparatus is calculated as follows:
η=η
1+（1-η
1）*η
2
η---device desulfurization degree, %;
η
1---device one-level circulation cleaning desulfurization degree, %;
η
2---device secondary circulation cleaning desulfurization degree, %;
Compare with existing calcium base wet-process sulfur removal technology, the sulfur removal technology of classification washing carries out classification washing by the washing slurries that adopt slurries subregion to obtain different pH to flue gas, and first the slurries by low pH value carry out making SO in flue gas after once washing to flue gas
2content reduces, and then the flue gas of the slurries by high pH value after to once washing carry out secondary washing, realizes the object of high-efficiency desulfurization.Its technical advantage is:
(1) in the situation that absorbent consumption is identical, in this technological system, absorbent slurry adds absorption tower by loop slurry case, the calcium sulfur ratio (mol ratio) of loop slurry case loop slurry surpasses 1.5, pH and reaches more than 5.8 ~ 6.4, makes the SO of this device portal flue gas
2concentration is up to 10000mg/Nm
3time, the SO in absorption tower outlet flue gas
2concentration still can be reduced to 50mg/Nm
3below, desulfuration efficiency can, up to 99.5%, meet up-to-date discharge standard.
(2) adopt the wet method fume desulfurizing system that this art designs is built the pH of loop slurry to be improved and stable operation by system configuration, the low problem of moving under high pH environment that maybe cannot be stabilized in of washing slurries pH of having avoided original technique to occur in the flue gas of sulphur coal or high desulfurization efficiency requirement is processed, has improved the adaptability of desulphurization system to domestic coal-fired flue-gas.
(3) this technology has realized slurries subregion, desulfurated plaster is discharged from the absorption tower stock tank of low pH value, and being conducive to desulfurizing byproduct complete oxidation is gypsum, and the surface moisture content of the desulfurated plaster of discharging from absorption tower is less than 8%, gypsum particle diameter central diameter value, between 20 ~ 30 microns, obtains high-quality gypsum.
Accompanying drawing explanation
The schematic diagram of flue gas desulfur device of the present utility model when Fig. 1 is two-stage washing.
1, absorption tower stock tank, the import of 2-adsorption tower smoke, 3-one-level slurries spraying layer, 4-one-level circulation slurry pump, 5-gypsum excavationg pump, 6-absorption tower oxidation fan, 7-slurries spraying layer, 8-tower top demister, 9-slurry collecting disc, 10-loop slurry case, 11-loop slurry case circulation slurry pump, 12-slurries Turo pump, 13-slurries rotational flow station, 14-loop slurry case oxidation fan, the outlet of 15-adsorption tower smoke.
The specific embodiment
The following examples are to describe in further detail of the present utility model.
As shown in Figure 1: the wet flue gas desulfurizer of classification washing of the present utility model is a classification washing absorption tower; the bottom on this absorption tower is provided with absorption tower stock tank 1; up be provided with again one-level slurries spraying layer 3; top is provided with tower top demister 8; between one-level slurries spraying layer 3 and tower top demister 8, be provided with one or more spray washing layer; described spray washing layer is comprised of slurries spraying layer 7 and slurry collecting disc 9, and slurries spraying layer 7 is positioned at slurry collecting disc 9 tops; The bottom of classification washing absorption tower is provided with adsorption tower smoke entrance 2, and top is provided with adsorption tower smoke outlet 15; Classification washing absorption tower is provided with gypsum discharge pipe and absorption tower air inlet pipe; Between absorption tower stock tank 1 and one-level slurries spraying layer 3, be provided with slurries circulation pipe; One side of classification washing absorption tower is provided with loop slurry case 10, and loop slurry case 10 is connected with spray washing layer by pipeline.
Slurries circulation pipe is provided with one-level circulation slurry pump 4, and gypsum discharge pipe is provided with gypsum excavationg pump 5, and absorption tower air inlet pipe is provided with absorption tower oxidation fan 6.Loop slurry case 10 bottoms are provided with loop slurry case air inlet pipe, and air inlet pipe is provided with loop slurry case oxidation fan 14.Loop slurry case 10 outsides are provided with slurries circulating line, and slurries circulating line is provided with slurries Turo pump 12 and slurries rotational flow station 13.Loop slurry case 10 outsides have respectively pipeline to connect slurries spraying layer 7 and the slurry collecting disc 9 of spray washing layer, on the pipeline that connects slurries spraying layer 7, are provided with loop slurry case circulation slurry pump 11.
The degree of depth of absorption tower stock tank 1 is 6.7m.One-level slurries spraying layer 3 is 9.5m apart from the distance at the bottom of absorption tower.Spray washing layer slurry collecting disc is 2m from the distance of one-level slurries spraying layer 3, spray washing leafing tower top demister 8) distance be 2m, in spray washing layer, the distance of slurries spraying layer 7 and slurry collecting disc 9 is 7.1m.Tower top demister 8 is 1m with the distance of tower top.
It is specific as follows that flue gas desulfur device of the present utility model carries out the method for flue gas desulfurization: undressed flue gas enters absorption tower from adsorption tower smoke entrance 2 and passes through absorption tower from bottom to top, with from top to bottom from the atomization slurry counter current contacting of the low pH value of one-level slurries spraying layer 3, part SO in flue gas
2be removed; The flue gas washing through one-level spray passes through one or more spray washing layer again, with from top to bottom from the atomization slurry counter current contacting of the high pH value of slurries spraying layer, remaining SO in flue gas
2be removed, the flue gas after washing exports 15 by adsorption tower smoke and discharges absorption tower after tower top demister is removed drop.
The utility model is applied to the flue-gas desulfurizing engineering of 2*300MW unit, and desulfurizer import exhaust gas volumn (mark state wet basis, actual oxygen) is 1336450Nm
3/ h, desulfurizer input gas temperature is 130 ℃, desulfurizer import SO
2concentration (mark state butt, 6%O
2) be 3594 mg/Nm
3, flue gas enters absorption tower from bottom to top by one-level uptake zone, absorption tower from classification washing absorption tower gas approach, with from top to bottom from the atomization slurry counter current contacting of one-level slurries spraying layer, part SO in flue gas
2in one-level uptake zone, be removed, the liquid-gas ratio of one-level loop slurry is 7.9 L/Nm
3, desulfuration efficiency is 68.5%.The flue gas that carries out preliminary washing through one-level spray enters secondary uptake zone, absorption tower from bottom to top by the flue gas circular passage in secondary slurry collecting disc district, absorption tower, with from top to bottom from the atomization slurry counter current contacting of secondary slurries spraying layer, remaining SO in flue gas
2in secondary uptake zone, be removed, the liquid-gas ratio of secondary loop slurry is 15.9 L/Nm
3, desulfuration efficiency is 97.0%.Flue gas after washing is exported and is discharged absorption tower by adsorption tower smoke after tower top demister is removed drop.SO in device outlet flue gas
2concentration (mark state butt, 6%O
2) be 32 mg/Nm
3, practical sulphur removal efficiency is 99.1%, desulfurated plaster surface moisture content is 7%, obtains high-quality desulfurated plaster.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is limited by claims and equivalent thereof.
Claims (9)
1. the wet flue gas desulfurizer of classification washing; it is characterized in that: described flue gas desulfur device is a classification washing absorption tower; the bottom on this absorption tower is provided with absorption tower stock tank (1); up be provided with again one-level slurries spraying layer (3); top is provided with tower top demister (8); between one-level slurries spraying layer (3) and tower top demister (8), be provided with one or more spray washing layer; described spray washing layer is comprised of slurries spraying layer (7) and slurry collecting disc (9), and slurries spraying layer (7) is positioned at slurry collecting disc (9) top; The bottom of classification washing absorption tower is provided with adsorption tower smoke entrance (2), and top is provided with adsorption tower smoke outlet (15); Classification washing absorption tower is provided with gypsum discharge pipe and absorption tower air inlet pipe; Between absorption tower stock tank (1) and one-level slurries spraying layer (3), be provided with slurries circulation pipe; One side of classification washing absorption tower is provided with loop slurry case (10), and loop slurry case (10) is connected with spray washing layer by pipeline.
2. flue gas desulfur device as claimed in claim 1, is characterized in that: slurries circulation pipe is provided with one-level circulation slurry pump (4), and gypsum discharge pipe is provided with gypsum excavationg pump (5), and absorption tower air inlet pipe is provided with absorption tower oxidation fan (6).
3. flue gas desulfur device as claimed in claim 1, is characterized in that: loop slurry case (10) bottom is provided with loop slurry case air inlet pipe, and air inlet pipe is provided with loop slurry case oxidation fan (14).
4. flue gas desulfur device as claimed in claim 1, is characterized in that: loop slurry case (10) outside is provided with slurries circulating line, and slurries circulating line is provided with slurries Turo pump (12) and slurries rotational flow station (13).
5. flue gas desulfur device as claimed in claim 1, it is characterized in that: outside slurries spraying layer (7) and the slurry collecting disc (9) that has respectively pipeline to connect spray washing layer of loop slurry case (10) is provided with loop slurry case circulation slurry pump (11) on the pipeline that connects slurries spraying layers (7).
6. flue gas desulfur device as claimed in claim 1, is characterized in that: the degree of depth of absorption tower stock tank (1) is to meet the slurries stay cycle height of 5 minutes or gypsum discharge desired height of 5 hours time of staying.
7. flue gas desulfur device as claimed in claim 1, is characterized in that: one-level slurries spraying layer (3) is stock tank height apart from the distance at the bottom of absorption tower and meets flue gas and be not less than the desired height sum of 3.5s in uptake zone, the absorption tower time of staying.
8. flue gas desulfur device as claimed in claim 1, it is characterized in that: slurry collecting disc is not less than 3m from the distance of one-level slurries spraying layer (3), the distance of spray washing leafing tower top demister (8) is not less than 2m, and in spray washing floor, the distance of slurries spraying layer (7) and slurry collecting disc (9) is for meeting flue gas at the desired height of spray washing district time of staying 3s.
9. flue gas desulfur device as claimed in claim 1, is characterized in that: tower top demister (8) is not less than 0.5m with the distance of tower top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105431.XU CN203725010U (en) | 2014-03-10 | 2014-03-10 | Staged washing flue gas wet-desulphurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105431.XU CN203725010U (en) | 2014-03-10 | 2014-03-10 | Staged washing flue gas wet-desulphurization device |
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| Publication Number | Publication Date |
|---|---|
| CN203725010U true CN203725010U (en) | 2014-07-23 |
Family
ID=51195111
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420105431.XU Expired - Lifetime CN203725010U (en) | 2014-03-10 | 2014-03-10 | Staged washing flue gas wet-desulphurization device |
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| Country | Link |
|---|---|
| CN (1) | CN203725010U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846005A (en) * | 2014-03-10 | 2014-06-11 | 北京国电龙源环保工程有限公司 | Wet process flue gas desulfurization device and method for classified washing |
| CN106955571A (en) * | 2017-04-17 | 2017-07-18 | 中国科学院过程工程研究所 | A kind of industrial smoke ozone step-by-step oxidation absorbs the device and method of simultaneous SO_2 and NO removal |
-
2014
- 2014-03-10 CN CN201420105431.XU patent/CN203725010U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846005A (en) * | 2014-03-10 | 2014-06-11 | 北京国电龙源环保工程有限公司 | Wet process flue gas desulfurization device and method for classified washing |
| CN106955571A (en) * | 2017-04-17 | 2017-07-18 | 中国科学院过程工程研究所 | A kind of industrial smoke ozone step-by-step oxidation absorbs the device and method of simultaneous SO_2 and NO removal |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Jian Inventor after: Li Xiaojin Inventor after: Chen Ou Inventor after: Chen Zhenyu Inventor after: Liu Kewei Inventor after: Ma Ziguo Inventor before: Liu Kewei Inventor before: Lu Guangjie Inventor before: Wang Renhu |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LIU KEWEI LU GUANGJIE WANG RENHU TO: CHEN JIAN LI XIAOJIN CHEN OU CHEN ZHENYU LIU KEWEI MA ZIGUO |
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| CP03 | Change of name, title or address |
Address after: 100039 room 901, 9 / F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee after: Guoneng Longyuan environmental protection Co.,Ltd. Address before: 100039 room 911, 1 building, 16 West Fourth Ring Road, Haidian District, Beijing. Patentee before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |
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| CX01 | Expiry of patent term |