CN204469527U - Series connection double tower wet desulphurization device - Google Patents
Series connection double tower wet desulphurization device Download PDFInfo
- Publication number
- CN204469527U CN204469527U CN201520122237.7U CN201520122237U CN204469527U CN 204469527 U CN204469527 U CN 204469527U CN 201520122237 U CN201520122237 U CN 201520122237U CN 204469527 U CN204469527 U CN 204469527U
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- Prior art keywords
- spray column
- flue
- gas
- series connection
- wet desulphurization
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- 239000007921 spray Substances 0.000 claims abstract description 84
- 239000007789 gas Substances 0.000 claims abstract description 49
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003546 flue gas Substances 0.000 claims abstract description 32
- 230000002745 absorbent Effects 0.000 claims abstract description 21
- 239000002250 absorbent Substances 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 238000000746 purification Methods 0.000 claims abstract description 15
- 239000005864 Sulphur Substances 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 28
- 239000002002 slurry Substances 0.000 claims description 21
- 239000003595 mist Substances 0.000 claims description 10
- 230000002708 enhancing effect Effects 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 7
- 238000005273 aeration Methods 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000002355 dual-layer Substances 0.000 claims description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 16
- 238000006477 desulfuration reaction Methods 0.000 abstract description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000002966 serum Anatomy 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model provides a kind of series connection double tower wet desulphurization device, comprises former gas flue, purification flue and spray column.The inside drenching tower is provided with spraying layer, to spray the absorbent be contained in bottom spray column.Wherein, spray column is two, and the gas approach of one of them spray column is communicated with former gas flue, and its exhanst gas outlet is communicated with the described gas approach of another spray column, and the exhanst gas outlet of another spray column is communicated with purification flue.Flue gas, after first spray column, enters another spray column and carries out sulphur removal.Flue gas can treat the longer time in two spray column again, extends the haptoreaction time of sulfur dioxide and absorbent, thus raising desulfuration efficiency.Single spray column considers desulfuration efficiency in technological design, and more total desulfuration efficiency can reduce a little, can reduce the internal circulating load that absorbent pumped by sprinkle density and circulating pump simultaneously, thus reduce energy consumption.Therefore, above-mentioned series connection double tower wet desulphurization device effectively can reduce energy ezpenditure.
Description
Technical field
The utility model relates to exhaust gas treatment technology, particularly relates to a kind of series connection double tower wet desulphurization device.
Background technology
At present, desulphurization system, while removal sulfur dioxide in flue gas, needs to consume the very most energy.Coal sulfur content is higher, and the energy that reach equal desulfuration efficiency consumption is also higher, and wet desulfurizing process is in all sulfur removal technologies, and power consumption during system cloud gray model is the highest, usually accounts for about 0.6 ~ 1% of generated energy, and sulphur coal unit can be high to more than 3%.Domestic current wet desulphurization efficiency, about 95%, generally adopts single absorption tower, and the sulfur removal technology of employing is based on lime stone gypsum-wet desulfurizing process.In wet desulfurization system, main large-scale current consuming apparatus is: desulphurization devices, absorption tower slurry circulating pump, lime stone ball mill, gypsum dehydration system etc., and wherein desulphurization devices, absorption tower serum recycle pump operation power consumption account for about 60% of whole desulphurization system operation power consumption.
High-concentration sulfur dioxide is produced during large-sized unit burning high sulfur coal, wet desulfurization system list tower spray is adopted to be increase sprinkle density and serum recycle amount for reaching higher desulfuration efficiency usual method, meanwhile require serum recycle pump power and lift larger, need consume electric energy at double more.
Utility model content
Based on this, be necessary to provide a kind of series connection double tower wet desulphurization device that effectively can reduce energy ezpenditure.
A kind of series connection double tower wet desulphurization device, for purifying high-sulphur former flue gas, and discharged from chimney by the flue gas after purification, described series connection double tower wet desulphurization device comprises:
For the former gas flue that former flue gas enters;
Purification flue, for being communicated with chimney, to discharge the flue gas after purification; And
Spray column, for hollow cylindrical configuration, for holding absorbent bottom it, the inside of described spray column is provided with spraying layer, described spraying layer is communicated with by circulating pump with bottom described spray column, to spray the absorbent be contained in bottom described spray column, the top of described spray column is provided with exhanst gas outlet, and its sidewall offers gas approach;
Wherein, described spray column is two, the described gas approach of spray column described in one of them is communicated with described former gas flue, and exhanst gas outlet described in it is communicated with the described gas approach of spray column described in another, and the described exhanst gas outlet of spray column described in another is communicated with described purification flue.
Wherein in an embodiment, also comprise former smoke induced draught fan, described former gas flue is communicated with through described former smoke induced draught fan with the described gas approach of spray column described in one of them.
Wherein in an embodiment, also comprise the first enhancing blower fan and second and strengthen blower fan, described first strengthens blower fan is communicated with described former gas flue, the communication of described second enhancing blower fan and two described spray columns.
Wherein in an embodiment, described spraying layer comprises multiple anticorrosion nozzle, and described multiple anticorrosion nozzle forms the jetted layers of multiple stacked setting.
Wherein in an embodiment, the opening direction of described multiple anticorrosion nozzle points to the bottom of described spray column.
Wherein in an embodiment, also comprise slurry mist condenser layer, described slurry mist condenser layer is arranged in described spray column, and between described spraying layer and the top of described spray column.
Wherein in an embodiment, the Dual-layer structure of described slurry mist condenser layer for be arrangeding in parallel.
Wherein in an embodiment, the bottom of described spray column is provided with aeration stirrer.
Wherein in an embodiment, the bottom of described spray column is provided with sediment slurry outlet.
Wherein in an embodiment, also comprise the bypass flue in parallel with described former gas flue, described former gas flue and described bypass flue are respectively arranged with the first baffle plate and second baffle.
Above-mentioned series connection double tower wet desulphurization device, flue gas, after first spray column, enters another spray column and carries out sulphur removal.Flue gas can treat the longer time in two spray column again, extends the haptoreaction time of sulfur dioxide and absorbent, thus raising desulfuration efficiency.Single spray column considers desulfuration efficiency in technological design, and more total desulfuration efficiency can reduce a little, can reduce the internal circulating load that absorbent pumped by sprinkle density and circulating pump simultaneously, thus reduce energy consumption.Therefore, above-mentioned series connection double tower wet desulphurization device effectively can reduce energy ezpenditure.
Accompanying drawing explanation
Fig. 1 is the structural representation of double tower wet desulphurization device of connecting in the utility model preferred embodiment.
Detailed description of the invention
For the ease of understanding the utility model, below with reference to relevant drawings, the utility model is described more fully.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present utility model more comprehensively thorough.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in description of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
Refer to Fig. 1, the series connection double tower wet desulphurization device 100 in the utility model preferred embodiment comprises former gas flue 110, purification flue 120, spray column 130, spraying layer 140 and circulating pump 150.
Flue gas after purification for purifying high-sulphur former flue gas, and is discharged from chimney 20 by series connection double tower wet desulphurization device 100.Former gas flue 110 enters for former flue gas.Purification flue 120 for being communicated with chimney 20, to discharge the flue gas after purification.
Spray column 130 is hollow cylindrical configuration.Concrete, spray column 130 can be made of metal, also can by brick one-tenth.The bottom of spray column 130 is for holding absorbent, and absorbent is used for sulfur dioxide absorption, and generates sulphite.
The inside of spray column 130 is provided with spraying layer 140, and spraying layer 140 is communicated with by circulating pump 150 with bottom spray column 130, to spray the absorbent be contained in bottom spray column 130.Absorbent is pumped to spraying layer 140 from bottom spray column 130 by circulating pump 150, and sprays through spraying layer 140, to mix with the sulfur dioxide in flue gas.Mixed slurries fall the bottom to spray column 130 after rise, and pump through circulating pump 150 circulation.
In the present embodiment, spraying layer 140 comprises multiple anticorrosion nozzle 141, and multiple anticorrosion nozzle 141 forms the jetted layers of multiple stacked setting.It is more abundant that sandwich construction can make flue gas and absorbent be mixed to get, thus promote sulfur limitation effect.
Further, in the present embodiment, the opening direction of multiple anticorrosion nozzle points to the bottom of spray column 130.
The top of spray column 130 is provided with exhanst gas outlet 133, and its sidewall offers gas approach 131.Wherein, spray column 130 is two, the gas approach 131 of one of them spray column 130 is communicated with former gas flue 110, and its exhanst gas outlet 133 is communicated with the gas approach 131 of another spray column 130, and the exhanst gas outlet 133 of another spray column 130 is communicated with described purification flue 120.Therefore, flue gas, after first spray column 130, enters another spray column 130 and carries out sulphur removal.
Flue gas enters spray column 130, can play following effect: one is active ingredient generation displacement reaction in described former sulfur dioxide in flue gas and absorbent, produces sulphite and reaches removing effect; Two is be dissolved in wherein after dust and hydrophilic group material and slurry liquid contacts in described former flue gas, is converted to liquid phase reaches removing effect by gas phase or solid phase; Three is that saturated mode steam in described former flue gas after hearth combustion and low temperature slurries are met cold, congealing reaction occurs and falls into supplementary slurries moisture spray column in; Four is that in former flue gas, high temperature state carbon dioxide and nitrogen and cold state slurries are met cold, reaches cooling effect, reduces the emptying rear heating effect to air.
In the present embodiment, double tower wet desulphurization device 100 of connecting also comprises former smoke induced draught fan 101.Former gas flue 110 is communicated with through former smoke induced draught fan 101 with the gas approach 131 of one of them spray column 130.Smoke induced draught fan 101 by former for former flue gas inspiration gas flue 110, can improve treatment effeciency.
Further in the present embodiment, series connection double tower wet desulphurization device 100 also comprises the first enhancing blower fan 102 and the second enhancing blower fan 103.First strengthens blower fan 102 is communicated with former gas flue 110, the communication of the second enhancing blower fan 103 and two spray columns 130.First enhancing blower fan 102 and the second enhancing blower fan 103 can prevent flue gas adverse current effectively.
In the present embodiment, double tower wet desulphurization device 100 of connecting also comprises slurry mist condenser layer 160.Slurry mist condenser layer 160 is arranged in spray column 130, and between spraying layer 140 and the top of described spray column 130.Slurry mist condenser layer 160 can by condensation vapor, thus avoid the moisture in absorbent to discharge with flue gas, prevents the water loss of absorbent.
Further, in the present embodiment, the Dual-layer structure of mist condenser layer 160 for be arrangeding in parallel is starched.Double-decker can increase reaction time and contact area, therefore condensation effect is better.
In the present embodiment, the bottom of spray column 130 is provided with aeration stirrer 135.Absorbent fully contacts with former flue gas and falls into the bottom of spray column 130 after reacting.Slurry pool sulfite salt, by blasting pressure-air and being stirred, is oxidized into the lower sulfate slurries of solubility, thus absorbent is recycled by aeration stirrer 135.
Further, in the present embodiment, the bottom of spray column 130 is provided with sediment slurry outlet 137.The sulfate slurries produced after stirring, can discharge from sediment slurry outlet 137.
In the present embodiment, double tower wet desulphurization device 100 of connecting also comprises the bypass flue 170 in parallel with former gas flue 110.Former gas flue 110 and bypass flue 170 are respectively arranged with the first baffle plate 104 and second baffle 105.
When two spray columns 130 work simultaneously, second baffle 105 is closed, and the first baffle plate 104 is opened simultaneously, and former flue gas enters in spray column 130.
Above-mentioned series connection double tower wet desulphurization device 100, flue gas, after first spray column 130, enters another spray column 130 and carries out sulphur removal.Flue gas can treat the longer time in two spray column 130 again, extends the haptoreaction time of sulfur dioxide and absorbent, thus raising desulfuration efficiency.Single spray column 130 considers desulfuration efficiency in technological design, and more total desulfuration efficiency can reduce a little, can reduce the internal circulating load that absorbent pumped by sprinkle density and circulating pump 150 simultaneously, thus reduce energy consumption.Therefore, double tower wet desulphurization device 100 of connecting effectively can reduce energy ezpenditure.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. a series connection double tower wet desulphurization device, for purifying high-sulphur former flue gas, and discharged from chimney by the flue gas after purification, it is characterized in that, described series connection double tower wet desulphurization device comprises:
For the former gas flue that former flue gas enters;
Purification flue, for being communicated with chimney, to discharge the flue gas after purification; And
Spray column, for hollow cylindrical configuration, for holding absorbent bottom it, the inside of described spray column is provided with spraying layer, described spraying layer is communicated with by circulating pump with bottom described spray column, to spray the absorbent be contained in bottom described spray column, the top of described spray column is provided with exhanst gas outlet, and its sidewall offers gas approach;
Wherein, described spray column is two, the described gas approach of spray column described in one of them is communicated with described former gas flue, and exhanst gas outlet described in it is communicated with the described gas approach of spray column described in another, and the described exhanst gas outlet of spray column described in another is communicated with described purification flue.
2. series connection double tower wet desulphurization device according to claim 1, is characterized in that, also comprise former smoke induced draught fan, and described former gas flue is communicated with through described former smoke induced draught fan with the described gas approach of spray column described in one of them.
3. series connection double tower wet desulphurization device according to claim 1, it is characterized in that, also comprise the first enhancing blower fan and second and strengthen blower fan, described first strengthens blower fan is communicated with described former gas flue, the communication of described second enhancing blower fan and two described spray columns.
4. series connection double tower wet desulphurization device according to claim 1, is characterized in that, described spraying layer comprises multiple anticorrosion nozzle, and described multiple anticorrosion nozzle forms the jetted layers of multiple stacked setting.
5. series connection double tower wet desulphurization device according to claim 4, is characterized in that, the opening direction of described multiple anticorrosion nozzle points to the bottom of described spray column.
6. series connection double tower wet desulphurization device according to claim 1, is characterized in that, also comprise slurry mist condenser layer, described slurry mist condenser layer is arranged in described spray column, and between described spraying layer and the top of described spray column.
7. series connection double tower wet desulphurization device according to claim 6, is characterized in that, the Dual-layer structure of described slurry mist condenser layer for be arrangeding in parallel.
8. series connection double tower wet desulphurization device according to claim 1, it is characterized in that, the bottom of described spray column is provided with aeration stirrer.
9. series connection double tower wet desulphurization device according to claim 1, is characterized in that, the bottom of described spray column is provided with sediment slurry outlet.
10. series connection double tower wet desulphurization device according to claim 1, is characterized in that, also comprises the bypass flue in parallel with described former gas flue, and described former gas flue and described bypass flue are respectively arranged with the first baffle plate and second baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520122237.7U CN204469527U (en) | 2015-03-03 | 2015-03-03 | Series connection double tower wet desulphurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520122237.7U CN204469527U (en) | 2015-03-03 | 2015-03-03 | Series connection double tower wet desulphurization device |
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| CN204469527U true CN204469527U (en) | 2015-07-15 |
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| CN201520122237.7U Expired - Fee Related CN204469527U (en) | 2015-03-03 | 2015-03-03 | Series connection double tower wet desulphurization device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032161A (en) * | 2015-09-09 | 2015-11-11 | 湖南高华环保股份有限公司 | System for removing high-concentration sulfur dioxide in flue gas by means of cascading twin-tower wet method |
| CN105833652A (en) * | 2016-06-01 | 2016-08-10 | 山东华能保温材料有限公司 | Dust removal system for polystyrene foam plate forming machine and application of dust removal system |
| CN107569986A (en) * | 2017-09-15 | 2018-01-12 | 江苏龙环环境科技有限公司 | A kind of industrial waste-gas purifier and its purification method |
| CN110280089A (en) * | 2019-07-10 | 2019-09-27 | 上海泓济环保科技股份有限公司 | Sewage fountain multi-level gas scrubbing tower |
| CN110368792A (en) * | 2019-08-19 | 2019-10-25 | 北京首钢国际工程技术有限公司 | A kind of double tower Two-way Cycle wet desulphurization device for wearing series-parallel flue |
| CN110882618A (en) * | 2018-09-10 | 2020-03-17 | 黄骅市鑫通机械设备有限公司 | Double-tower desulfurization dust-removing equipment |
| TWI708635B (en) * | 2018-11-02 | 2020-11-01 | 德商達斯環境專家有限責任公司 | Apparatus and method for wet cleaning a gas stream |
| CN113996166A (en) * | 2021-10-22 | 2022-02-01 | 浙江宜可欧环保科技有限公司 | Method and device for deacidifying hot flue gas |
-
2015
- 2015-03-03 CN CN201520122237.7U patent/CN204469527U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032161A (en) * | 2015-09-09 | 2015-11-11 | 湖南高华环保股份有限公司 | System for removing high-concentration sulfur dioxide in flue gas by means of cascading twin-tower wet method |
| CN105833652A (en) * | 2016-06-01 | 2016-08-10 | 山东华能保温材料有限公司 | Dust removal system for polystyrene foam plate forming machine and application of dust removal system |
| CN107569986A (en) * | 2017-09-15 | 2018-01-12 | 江苏龙环环境科技有限公司 | A kind of industrial waste-gas purifier and its purification method |
| CN110882618A (en) * | 2018-09-10 | 2020-03-17 | 黄骅市鑫通机械设备有限公司 | Double-tower desulfurization dust-removing equipment |
| TWI708635B (en) * | 2018-11-02 | 2020-11-01 | 德商達斯環境專家有限責任公司 | Apparatus and method for wet cleaning a gas stream |
| US11504670B2 (en) | 2018-11-02 | 2022-11-22 | Das Environmental Expert Gmbh | Apparatus and method for wet cleaning a gas stream |
| CN110280089A (en) * | 2019-07-10 | 2019-09-27 | 上海泓济环保科技股份有限公司 | Sewage fountain multi-level gas scrubbing tower |
| CN110368792A (en) * | 2019-08-19 | 2019-10-25 | 北京首钢国际工程技术有限公司 | A kind of double tower Two-way Cycle wet desulphurization device for wearing series-parallel flue |
| CN113996166A (en) * | 2021-10-22 | 2022-02-01 | 浙江宜可欧环保科技有限公司 | Method and device for deacidifying hot flue gas |
| CN113996166B (en) * | 2021-10-22 | 2023-10-24 | 浙江宜可欧环保科技有限公司 | Method and device for deacidifying hot flue gas |
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| C14 | Grant of patent or utility model | ||
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Address after: Tongzi high tech Development Zone in Hunan province Changsha Po Road 410000 No. 229 Lugu International Industrial Park A-7 Building No. 408 Patentee after: Changsha Hong Fu green technology Co., Ltd Address before: 1610, room 398, Maira building, 410000 Jinxing Road, West Lake street, Changsha, Hunan, Yuelu District Patentee before: Changsha Hong Fu green technology Co., Ltd |
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