CN201912884U - Ammonia desulfurizer with two-level gas distributors - Google Patents

Ammonia desulfurizer with two-level gas distributors Download PDF

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Publication number
CN201912884U
CN201912884U CN2011200020384U CN201120002038U CN201912884U CN 201912884 U CN201912884 U CN 201912884U CN 2011200020384 U CN2011200020384 U CN 2011200020384U CN 201120002038 U CN201120002038 U CN 201120002038U CN 201912884 U CN201912884 U CN 201912884U
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CN
China
Prior art keywords
gas distributor
distributor
provided
desulfurizing tower
air
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Application number
CN2011200020384U
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Chinese (zh)
Inventor
徐长香
罗静
徐延忠
庞克亮
许祥俊
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江苏新世纪江南环保有限公司
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Priority to CN2011200020384U priority Critical patent/CN201912884U/en
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Publication of CN201912884U publication Critical patent/CN201912884U/en

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Abstract

An ammonia desulfurizer with two-level gas distributors is provided with a desulfurizing tower, and an absorbing segment, a concentrating segment and an oxidizing segment are arranged inside the desulfurizing tower from top to bottom. Fume enters the concentrating segment via a fume inlet arranged in the middle of the desulfurizing tower, the concentrating segment is provided with a sprayer, and one gas distributor is arranged on the upper portion of the concentrating segment. The absorbing segment comprises a desulfurizing spraying layer, a washing layer and a smog removal layer. A fume outlet used for discharging clean fume is arranged on the top of the desulfurizing tower, and absorption liquid of the absorbing segment is collected to the oxidizing segment arranged on the lower portion of the desulfurizing tower. The oxidizing segment is provided with the primary gas distributor, the concentrating segment is provided with the secondary gas distributor, and the gas distributors are provided with even air holes.

Description

A kind of ammonia desulfuration equipment that has the two-stage gas distributor

One, technical field

The utility model belongs to field of environment protection, relates to a kind of collection imonium salt oxidation and SO 2Remove flue gas desulfur device, relate in particular to the ammonia desulfuration equipment that has the two-stage gas distributor in one.

Two, background technology

China is coal-fired big country, and coal has accounted for very big proportion in the primary energy total quantity consumed.Along with the continuous growth of consumption of coal, coal fire discharged SO 2Amount constantly increases, by SO 2The acid rain that discharging caused Deng pollutant is on the rise to the influence that human lives, activity in production produce.For improving environmental quality, control SO 2Discharge capacity, the development of various in recent years sulfur removal technologies is comparatively rapid.Wherein, wet ammonia process desulfurizing technology is comparatively ripe at present sulfur removal technology, and washing contains SO as absorbent with ammonia for it 2Flue gas, the absorption liquid after the absorption is handled with diverse ways and is obtained different products.

Different according to process and accessory substance, wet ammonia process desulfurizing technology can be divided into ammonia-acid system, ammonia-ammonium sulfite, ammonia-ammonia sulfate method etc. again.Wherein, ammonia-acid system, ammonia-ammonium sulfite just begin to be applied to industrial production as far back as the thirties in 20th century, but because ammonia-acid technological process need consume a large amount of sulfuric acid, divide simultaneously and free the SO that sucks out 2Gas must have supporting relieving haperacidity treatment system; And ammonia-ammonium sulfite technology desulfuration byproduct is an ammonium sulfite, and product outlet has certain problem, therefore, has limited the application in the flue gas desulfurization field of ammonia-acid system, ammonia-ammonium sulfite technology to a certain extent.Ammonia-ammonia sulfate method sulfur removal technology system is more succinct, and byproduct of ammonium sulfate can be made agricultural fertilizer, can adapt to the needs of China's flue gas desulfurization development preferably.

Ammonia-ammonia sulfate method desulfurization intermediate product (NH 4) 2SO 3Oxidation be the key that is related to the ammonia desulfuration equipment performance driving economy.Methods such as pressure oxidation, catalytic oxidation were arranged in the past, need build a cover oxidation unit in addition, and made the operating cost of whole system be difficult to descend.In recent years, utilize the technology of compressed air forced oxidation in addition, advantages such as that this technology has is simple to operate, it is little to take up an area of, reduced investment, oxidation efficiency height, but its oxidation air consumption is big, utilization rate is high and cause the operating cost height.Therefore, press for exploitation a kind of oxygenation efficiency height, oxidation air utilization rate height, simple in structure, handled easily, reduced investment, salt oxidation of collection imonium and SO that operating cost is low 2Remove ammonia desulfuration equipment in one.

Three, utility model content

The utility model purpose is: propose a kind of ammonia desulfuration equipment that has the two-stage gas distributor, especially a kind of oxygenation efficiency height, oxidation air utilization rate height, simple in structure, handled easily, reduced investment, salt oxidation of collection imonium and SO that operating cost is low 2Remove ammonia desulfuration equipment in one.

The technical solution of the utility model is: have the ammonia desulfuration equipment of two-stage gas distributor, be provided with desulfurizing tower, be provided with absorber portion, enriching section and oxidation panel in the desulfurizing tower from top to bottom; The desulfurizing tower middle part is provided with smoke inlet, flue gas enters enriching section from smoke inlet, enriching section is provided with spray thrower, the top of enriching section is provided with gas distributor, absorber portion comprises desulfurization spraying layer, washing layer, demist layer, the desulfurizing tower top is provided with the exhanst gas outlet of discharging clean flue gas, and the bottom of desulfurizing tower is an oxidation panel; The absorption liquid of absorber portion comes together in the oxidation panel of tower bottom; It is characterized in that being provided with the one-level gas distributor at oxidation panel, be provided with the secondary gas distributor at enriching section, described gas distributor is the device that evenly has qi-emitting hole.

Improvement of the present utility model is: the slip after enriching section bottom concentrates exports enriching section to by the secondary circulating pump after refluxing and entering the circulating slot that tower is provided with outward.Be provided with dividing plate between oxidation panel and the enriching section.

Oxidation panel communicates with the spray thrower of absorber portion and the spray thrower of enriching section by the tower external circulation line, and each circulation line is respectively equipped with circulating pump.

Flue gas enters desulfurizing tower, has removed SO 2Flue gas discharge through desulfurizing tower top, absorption liquid enters the oxidation panel of desulfurizing tower through return duct.Oxidation air enters oxidation panel after the one-level gas distributor that is located at the oxidation panel bottom is uniform, with the ammonium sulfurous solution oxide, oxidation limit, oxidation air limit rises to oxidation panel top, and advance secondary air inlet pipe (being the secondary gas distributor that desulfurizing tower enriching section bottom is provided with) from the tube connector of oxidation panel and enriching section, oxidation air enters enriching section after uniform, to the further oxidation of absorption liquid, final, discharge through desulfurizing tower top with clean flue gas.

The beneficial effects of the utility model are: the utility model device can be realized the even distribution of desulfurizing agent ammonia (liquefied ammonia, ammoniacal liquor, carbon ammonium) preferably, and the desulfurizing byproduct ammonium sulfite is carried out abundant oxidation by two sections distribution device in gas-fluid, the ammonium sulfate slurry of output high concentration, its product can be produced agricultural ammonium sulfate product at low cost by the working condition of routine.Oxygenation efficiency height of the present utility model, oxidation air utilization rate height, simple in structure, handled easily, reduced investment, operating cost are low, and collection imonium salt oxidation and SO 2Remove ammonia desulfuration equipment in one.Utilize the desulfurization degree of the whole device of the utility model design can reach 98.5%, SO in the flue gas after desulfurization 2Content is 145mg/Nm 3Year removes SO 25.33 ten thousand t/a produce ammonium sulfate 11.1 ten thousand t/a per year, sulphur ammonium oxygenation efficiency is more than 99.5%, and N content 〉=20.8% in the product reaches the requirement of GB535-1995 certified products.

Four, description of drawings

Fig. 1 is the structural representation of the utility model device:

1-desulfurizing tower 2-desulfurizing tower absorber portion 3-desulfurizing tower enriching section 4-desulfurizing tower oxidation panel 5-gas distributor 6-desulfurizing tower smoke inlet 7-secondary air inlet pipe 8-one-level air inlet pipe 9-main air distributor, 10-oxidation panel and enriching section dividing plate 11-secondary air distributor 12-enriching section spray thrower 13-overflow pipe 14-absorber portion spray thrower 15-demist layer 16-desulfurizing tower exhanst gas outlet 17-washing layer 18-one-level circulating pump 19-secondary circulating pump 20-circulating slot.

Five, the specific embodiment

Desulfurizing tower 1 is divided into absorber portion 2, enriching section 3 and oxidation panel 4 from top to bottom.Flue gas fully contacts with absorption liquid from the enriching section that desulfurizing tower middle part smoke inlet 6 enters desulfurizing tower, evaporate a part of water, obtain the slip of certain solid content, flue-gas temperature is dropped to below 75 ℃ simultaneously, flue gas contacts the SO in the flue gas with absorption liquid from desulfurization spraying layer 14 after gas distributor 5 enters absorber portion 2Be absorbed the back and upwards discharge clean flue gas from exhanst gas outlet 16 through washing layer 17, demist layer 15.The desulfurizing tower bottom is an oxidation panel, and it separates by dividing plate 10 with enriching section.Oxidation panel communicates with the spray thrower 14 of absorber portion and the spray thrower 12 of enriching section by the tower external circulation line, and each circulation line is respectively equipped with circulating pump 18,19.The absorber portion absorption liquid comes together in the oxidation panel of tower bottom by overflow pipe 13 through the gravity effect.Oxidation air enters oxidation panel after one-level air inlet pipe 8 inputs to main air distributor 9, utilize compressed air that absorption liquid is carried out forced oxidation and generate ammonium sulfate, and ammonium sulfate exports enriching section to by secondary circulating pump 19 after entering circulating slot.The remaining air of oxidation enters enriching section by secondary air inlet pipe 7, evenly distributes through secondary air distributor 11, utilizes to remain oxygen in the flue gas to the further oxidation of enriching slurry.Slip after concentrating is back to circulating slot 20 again, treats to reach in the groove to deliver to the back system by discharging pump behind certain solid content and further handle.

Its apparatus features is: 1. the two-stage gas distributor the realization two-stage oxidizing is set, under the condition that guarantees the abundant oxidation of imonium salt, improved compressed-air actuated utilization rate effectively; 2. two-stage oxidizing air intlet place is equipped with the liquid seal form, prevents that liquid from pouring in down a chimney, and utilizes the raising of the pressure accelerating oxidation efficient of liquid level formation.

1, installs concrete feature

1) desulfurizing tower

The desulfurizing tower body of the tower is provided with oxidation unit, gas approach, washing temperature descending section, desulfurization absorber portion, demister and exhanst gas outlet from the bottom to top.The specific structural features of desulfurizing tower is existing detailed description in the applicant's patent ZL200420109458.2 " Multi-functional Compound Thionizer ", does not do too much explanation herein.

2) one-level distribution device in gas-fluid

The one-level distribution device in gas-fluid comprises that one-level air inlet pipe, oxidation air and absorbent add inlet and one-level gas distributor.The air inlet pipe height should be more lower slightly than oxidation panel height, and one is at 6-12m.Gas distributor is used for realizing the even distribution of absorbent and air, evenly perforate on the distributor, and the aperture is 4-20mm.

One-level air inlet pipe caliber d 1(m) determine according to following formula:

π d 1 2 4 u × 3600 = V air × α

Wherein:

V AirBe the theoretical requirement of oxidation air, Nm 3/ h;

U is the inner air tube flow velocity, and one value is between 12-18m/s;

α is the excess air system, and one value is between 1.5-3.5.

Number of aperture n on the one-level distributor 1Be calculated as follows:

n 1 = ( d 1 d 10 ) 2

Wherein: d 10Be one-level distributor perforate aperture, the m of unit.

3) secondary gas distribution apparatus

The secondary gas distribution apparatus comprises that secondary air inlet pipe, absorbent add inlet and secondary gas distributor.Air inlet pipe should be held the consistent or summary height of liquid height with enriching section, and one is at 1-4m; Evenly perforate on the gas distributor, the aperture is 4-18mm.Its aperture is more smaller than one-level gas distributor perforate aperture.

Secondary air inlet pipe caliber d 2(m) determine according to following formula:

π d 2 2 4 u × 3600 = V air × ( α - 0.8 )

Number of aperture n on the secondary distributor 2Be calculated as follows:

n 2 = ( d 2 d 20 ) 2

Wherein: d 20Be secondary distributor perforate aperture, m.

Application example of the present utility model:

The ammonia process of desulfurization engineering that is used for 2 * 240t/h boiler smoke, this project are two stoves, one towers, and desulfurizing tower smoke treatment amount is 650,000 Nm 3/ h, SO in the flue gas 2Content is 10513mg/Nm 3, desulfuration efficiency 98.5%.The desulfurizing tower tower diameter is Tower height 37m, in line chimney height is 53m.The theoretical requirement 5609Nm of oxidation air 3/ h, one-level air inlet pipe velocity in pipes is 16.4m/s, excess air system 2.5, one-level air inlet pipe caliber 550mm, one-level distributor perforate aperture is 10mm, number of aperture is 3025.Secondary air inlet pipe velocity in pipes is 16.7m/s, secondary air inlet pipe caliber 450mm secondary, and distributor perforate aperture is 8mm, number of aperture is 3164.

The device principal character:

1, desulfurizing tower: desulfurizing tower tower diameter Tower height 37m, in line chimney height is 53m, and three layers of spray are set in the absorber portion, spraying layer spacing 2.5m.

2, one-level air inlet pipe caliber 550mm, one-level distributor perforate aperture is 10mm, number of aperture is 3025.

3, secondary air inlet pipe caliber 450mm, secondary distributor perforate aperture is 8mm, number of aperture is 3164.

Claims (8)

1. have the ammonia desulfuration equipment of two-stage gas distributor, be provided with desulfurizing tower, be provided with absorber portion, enriching section and oxidation panel in the desulfurizing tower from top to bottom; The desulfurizing tower middle part is provided with smoke inlet, flue gas enters enriching section from smoke inlet, enriching section is provided with spray thrower, the top of enriching section is provided with gas distributor, absorber portion comprises desulfurization spraying layer, washing layer, demist layer, the desulfurizing tower top is provided with the exhanst gas outlet of discharging clean flue gas, and the bottom of desulfurizing tower is an oxidation panel; The absorption liquid of absorber portion comes together in the oxidation panel of tower bottom;
It is characterized in that being provided with the one-level gas distributor at oxidation panel, be provided with the secondary gas distributor at enriching section, described gas distributor is the device that evenly has qi-emitting hole.
2. the ammonia desulfuration equipment that has the two-stage gas distributor according to claim 1 is characterized in that the one-level gas distributor comprises that air inlet pipe, oxidation air and absorbent add inlet and distributor; The height on air inlet pipe aspect ratio oxidation panel top is lower slightly, and the aperture of qi-emitting hole is 4-20mm on the distributor.
3. the ammonia desulfuration equipment that has the two-stage gas distributor according to claim 2 is characterized in that one-level gas distributor air inlet pipe caliber d 1(m) determine according to following formula:
π d 1 2 4 u × 3600 = V air × α
Wherein: V AirBe the theoretical requirement of oxidation air, the Nm of unit 3/ h;
U is the inner air tube flow velocity, and value is between 12-18m/s;
α is the excess air system, and value is between 1.5-3.5.
4. according to claim 2 or the 3 described ammonia desulfuration equipments that have the two-stage gas distributor, it is characterized in that number of aperture n on the distributor 1Be calculated as follows:
n 1 = ( d 1 d 10 ) 2
Wherein: d 10Be one-level gas distributor perforate aperture, the m of unit.
5. the ammonia desulfuration equipment that has the two-stage gas distributor according to claim 1 and 2 is characterized in that the secondary gas distributor comprises that air inlet pipe, absorbent add inlet and distributor, air inlet pipe and enriching section hold the consistent or summary height of liquid height; Evenly open qi-emitting hole on the distributor, the aperture is 4-18mm, and its aperture is littler than the gas distribution aperture of one-level gas distributor.
6. the ammonia desulfuration equipment that has the two-stage gas distributor according to claim 5 is characterized in that the air inlet pipe caliber d of secondary gas distributor 2(m) determine according to following formula:
π d 2 2 4 u × 3600 = V air × ( α - 0.8 )
Number of aperture n on the distributor 2Be calculated as follows:
n 2 = ( d 2 d 20 ) 2
Wherein: d 20Be distributor perforate aperture, the m of unit.
7. the ammonia desulfuration equipment that has the two-stage gas distributor according to claim 1 and 2 is characterized in that being provided with dividing plate between oxidation panel and the enriching section.
8. the ammonia desulfuration equipment that has the two-stage gas distributor according to claim 1 and 2 is characterized in that oxidation panel communicates with the spray thrower of absorber portion and the spray thrower of enriching section by the tower external circulation line, and each circulation line is respectively equipped with circulating pump.
CN2011200020384U 2011-01-06 2011-01-06 Ammonia desulfurizer with two-level gas distributors CN201912884U (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104667716A (en) * 2015-02-13 2015-06-03 北京阳光欣禾科技有限公司 Flue gas desulfurization and denitration integrated technology
CN105107354A (en) * 2015-07-16 2015-12-02 刘国忠 Ammonia desulphurization process and device utilizing flue to save energy and save money at the same time
CN106731621A (en) * 2016-11-16 2017-05-31 中碳能源(山东)有限公司 A kind of ammonia desulfurizing process and device
US10016721B1 (en) 2017-05-25 2018-07-10 Jiangnan Environmental Protection Group Inc. Ammonia-based desufurization process and apparatus
US10092877B1 (en) 2017-05-25 2018-10-09 Jiangnan Environmental Protection Group Inc. Dust removal and desulfurization of FCC exhaust gas
US10099170B1 (en) 2017-06-14 2018-10-16 Jiangnan Environmental Protection Group Inc. Ammonia-adding system for ammonia-based desulfurization device
US10112145B1 (en) 2017-09-07 2018-10-30 Jiangnan Environmental Protection Group Inc. Method for controlling aerosol production during absorption in ammonia desulfurization
US20190001267A1 (en) 2017-07-03 2019-01-03 Jiangnan Environmental Protection Group Inc. Desulfurization absorption tower
US10207220B2 (en) 2017-03-15 2019-02-19 Jiangnan Environmental Protection Group Inc. Method and apparatus for removing sulfur oxides from gas
WO2019196247A1 (en) * 2018-04-13 2019-10-17 Jiangnan Environmental Protection Group Inc. A method and a device for oxidizing a solution for ammonia desulfurization

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104667716A (en) * 2015-02-13 2015-06-03 北京阳光欣禾科技有限公司 Flue gas desulfurization and denitration integrated technology
CN105107354A (en) * 2015-07-16 2015-12-02 刘国忠 Ammonia desulphurization process and device utilizing flue to save energy and save money at the same time
CN106731621A (en) * 2016-11-16 2017-05-31 中碳能源(山东)有限公司 A kind of ammonia desulfurizing process and device
US10207220B2 (en) 2017-03-15 2019-02-19 Jiangnan Environmental Protection Group Inc. Method and apparatus for removing sulfur oxides from gas
US10413864B2 (en) 2017-03-15 2019-09-17 Jiangnan Environmental Protection Group Inc. Method and apparatus for removing sulfur oxides from gas
US10406477B2 (en) 2017-03-15 2019-09-10 Jiangnan Environmental Protection Group Inc. Method and apparatus for removing sulfur oxides from gas
US10675584B2 (en) 2017-03-15 2020-06-09 Jiangnan Environmental Protection Group Inc. Method and apparatus for removing sulfur oxides from gas
US10092877B1 (en) 2017-05-25 2018-10-09 Jiangnan Environmental Protection Group Inc. Dust removal and desulfurization of FCC exhaust gas
US10561982B2 (en) 2017-05-25 2020-02-18 Jiangnan Environmental Protection Group Inc. Ammonia-based desulfurization process and apparatus
US10471383B2 (en) 2017-05-25 2019-11-12 Jiangnan Environmental Protection Group Inc. Dust removal and desulfurization of FCC exhaust gas
US10213739B2 (en) 2017-05-25 2019-02-26 Jiangnan Environmental Protection Group Inc. Dust removal and desulfurization of FCC exhaust gas
US10343110B2 (en) 2017-05-25 2019-07-09 Jiangnan Environmental Protection Group Inc. Dust removal and desulfurization of FCC exhaust gas
US10016721B1 (en) 2017-05-25 2018-07-10 Jiangnan Environmental Protection Group Inc. Ammonia-based desufurization process and apparatus
US10406478B2 (en) 2017-05-25 2019-09-10 Jiangnan Environmental Protection Group Inc. Ammonia-based desulfurization process and apparatus
US10399033B2 (en) 2017-05-25 2019-09-03 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
US10159929B1 (en) 2017-06-14 2018-12-25 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
US10099170B1 (en) 2017-06-14 2018-10-16 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
US10421040B2 (en) 2017-07-03 2019-09-24 Jiangnan Environmental Protection Group Inc. Desulfurization absorption tower
US10427097B2 (en) 2017-07-03 2019-10-01 Jiangnan Environmental Protection Group Inc. Desulfurization absorption tower
US10618001B2 (en) 2017-07-03 2020-04-14 Jiangnan Environmental Protection Group Inc. Desulfurization absorption tower
US20190001267A1 (en) 2017-07-03 2019-01-03 Jiangnan Environmental Protection Group Inc. Desulfurization absorption tower
US10556205B2 (en) 2017-07-03 2020-02-11 Jiangnan Environmental Protection Group Inc. Desulfurization absorption tower
US10561984B2 (en) 2017-07-03 2020-02-18 Jiangnan Environmental Protection Group Inc. Desulfurization absorption tower
US10369517B2 (en) 2017-09-07 2019-08-06 Jiangnan Environmental Protection Group Inc. Method for controlling aerosol production during absorption in ammonia desulfurization
US10449488B2 (en) 2017-09-07 2019-10-22 Jiangnan Environmental Protection Group Inc. Method for controlling aerosol production during absorption in ammonia desulfurization
US10357741B2 (en) 2017-09-07 2019-07-23 Jiangnan Environmental Protection Group Inc. Method for controlling aerosol production during absorption in ammonia desulfurization
US10112145B1 (en) 2017-09-07 2018-10-30 Jiangnan Environmental Protection Group Inc. Method for controlling aerosol production during absorption in ammonia desulfurization
WO2019196247A1 (en) * 2018-04-13 2019-10-17 Jiangnan Environmental Protection Group Inc. A method and a device for oxidizing a solution for ammonia desulfurization

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Address after: 211100 No. 108, Tianyuan Road, Jiangning District, Jiangsu, Nanjing

Patentee after: Jiangsu New Century Jiangnan Environmental Protection Co., Ltd.

Address before: 211100 No. 108, Tianyuan Road, Jiangning District, Jiangsu, Nanjing

Patentee before: Jiangsu Jiangnan Environment Protection and Research Academy

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Address after: 211100, No. 29, Su Yuan Avenue, Jiangning District, Jiangsu, Nanjing

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Address before: 211100 No. 108, Tianyuan Road, Jiangning District, Jiangsu, Nanjing

Patentee before: Jiangsu New Century Jiangnan Environmental Protection Co., Ltd.