CN204786491U - Boiler smoke waste -heat application system - Google Patents
Boiler smoke waste -heat application system Download PDFInfo
- Publication number
- CN204786491U CN204786491U CN201520514599.0U CN201520514599U CN204786491U CN 204786491 U CN204786491 U CN 204786491U CN 201520514599 U CN201520514599 U CN 201520514599U CN 204786491 U CN204786491 U CN 204786491U
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- China
- Prior art keywords
- flue gas
- heat exchanger
- outlet
- boiler
- flue
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- 239000000779 smoke Substances 0.000 title claims abstract description 21
- 239000002918 waste heat Substances 0.000 title claims abstract description 14
- 239000003546 flue gas Substances 0.000 claims abstract description 118
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 117
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 40
- 230000023556 desulfurization Effects 0.000 claims abstract description 40
- 238000001704 evaporation Methods 0.000 claims abstract description 31
- 230000008020 evaporation Effects 0.000 claims abstract description 28
- 239000000428 dust Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 239000007787 solid Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000003303 reheating Methods 0.000 abstract 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 12
- 239000002253 acid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000008676 import Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model provides a boiler smoke waste -heat application system, includes cryogenic heat exchanger, flue gas reheating ware, dust remover and fan, cryogenic heat exchanger connects on the flue after the air heater of boiler, exhanst gas outlet at boiler flue gas desulphurization device's desulfurizing tower connects gradually dust remover and flue gas reheating ware, be connected with the tuber pipe between cryogenic heat exchanger and flue gas reheating ware, on the fan installation tuber pipe, the series connection of high temperature heat exchanger is provided with the high temperature flue gas fairlead that is connected to the evaporating column on installing the flue between cryogenic heat exchanger and boiler on the flue between economizer and air heater, the flue gas inlet of desulfurizing tower is connected to the outlet flue of evaporating column, the sour dew point temperature of flue gas reduces to below 80 DEG C after the desulfurization of the messenger of this system, makes the flue -gas temperature rise between 80-90 DEG C, the dewfall corrosion in the chimney no longer appears, can also appear partial desulfurization liquid evaporation with solid matter wherein, the zero release of desulfurization waste water has been realized in returning desulfurization system to the vapor of formation.
Description
The technical field is as follows:
the utility model relates to a boiler flue gas waste heat utilization system.
Background art:
in recent years, the national places great attention on energy conservation and emission reduction, so that in the power generation industry, a research hotspot is formed on how to effectively utilize the waste heat of boiler flue gas. However, because the flue gas at the tail of the boiler has sulfur trioxide, especially for a coal-fired boiler, even if the flue gas of the boiler is subjected to desulfurization treatment, the flue gas still contains sulfur trioxide with a certain concentration, the temperature of the flue gas after wet desulfurization of the flue gas of the boiler is generally about 50 ℃ and lower than the acid dew point temperature, the sulfur trioxide in the flue gas reacts with water to generate sulfuric acid, a serious condensation corrosion phenomenon is generated in a chimney, and in order to reduce the condensation corrosion phenomenon in the flue gas as much as possible, the temperature of the flue gas from the boiler to the chimney needs to be increased and is generally controlled to be 140-160 ℃, so that the waste of energy is.
The desulfurization waste water contains a large amount of precipitates such as dust, desulfurization products and the like, the desulfurization solution is recycled, in order to reduce the precipitates in the desulfurization solution, part of the desulfurization solution needs to be led out to be used as the desulfurization waste water for treatment, and meanwhile, fresh desulfurization solution is added into the desulfurization solution; because the desulfurization wastewater also comprises heavy metals such as mercury, arsenic and chromium, the wastewater treated by chemical methods such as neutralization, flocculation and precipitation cannot reach the standard and still be discharged well, the treated wastewater cannot enter a system for recycling, the treatment cost of the desulfurization wastewater is high, the burden of enterprises is high, and how to treat the desulfurization wastewater at low cost becomes an important subject of the enterprises at present.
The utility model has the following contents:
the utility model aims at providing a boiler flue gas waste heat utilization system with remarkable energy-saving effect, which can improve the flue gas temperature after wet desulphurization and reduce the acid dew point temperature of the flue gas after desulphurization, thereby reducing or canceling the energy consumption required for improving the flue gas temperature after desulphurization; another object of the present invention is to reduce the cost of treating desulfurization waste water.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a boiler flue gas waste heat utilization system is used for a boiler flue gas desulfurization device and comprises a low-temperature heat exchanger, a flue gas reheater, a dust remover and a fan; the low-temperature heat exchanger is provided with a first flue gas inlet, a first flue gas outlet, a first air inlet and a first air outlet; the smoke reheater is provided with a second smoke inlet, a second smoke outlet, a second air inlet and a second air outlet; the low-temperature heat exchanger is connected to a flue behind an air preheater of the boiler; a flue gas outlet of a desulfurizing tower of the boiler flue gas desulfurization device is sequentially connected with a dust remover and a flue gas reheater; the first air inlet and the second air outlet are connected by a low-temperature air inlet pipe, and the first air outlet and the second air inlet are connected by a high-temperature air return pipe; the fan is arranged on the low-temperature air inlet pipe or the high-temperature air return pipe.
Further, the dust collector is preferably a wet electric dust collector.
The utility model discloses at the during operation, the air after the fan will be heated in low temperature heat exchanger is sent into the flue gas after the dust remover in the flue gas reheater, heats the flue gas after the desulfurization, because the flue gas after the desulfurization has reduced the moisture that contains by a wide margin after the dust remover, makes the sulfur trioxide content in the flue gas also synchronous reduce by a wide margin, therefore the acid dew point temperature of flue gas is reduced to below 80 ℃ effectively; the flue gas is heated to 80-90 ℃ in the flue gas reheater, so that the dewing corrosion phenomenon in the chimney is greatly reduced or even does not occur.
Among the prior art that compares, need utilize other heat energy to promote the flue gas after the desulfurization to between 140 ~ 160 ℃ by about 50 ℃, just enable the temperature of flue gas and be higher than acid dew point temperature, the utility model discloses utilize the flue gas self heat energy before the desulfurization to heat the flue gas after the desulfurization, no longer need additionally provide heat energy and heat the flue gas after the desulfurization, have the huge advantage of energy saving.
Meanwhile, after the flue gas is subjected to heat exchange through the low-temperature heat exchanger, the temperature of the flue gas is reduced, the volume is reduced, the desulfurization effect is enhanced, the concentration of sulfur trioxide in the flue gas is further reduced, and the phenomenon of condensation and corrosion in a chimney is effectively avoided.
The boiler flue gas waste heat utilization system also comprises a high-temperature heat exchanger, an evaporation tower and a heat exchange pump; the high-temperature heat exchanger is provided with a third flue gas inlet, a third flue gas outlet, a liquid inlet and a liquid outlet; the evaporation tower is provided with a smoke inlet, a spraying port, a smoke outlet and an ash discharge port; the high-temperature heat exchanger is installed on a flue between the low-temperature heat exchanger and the air preheater in series, wherein a third flue gas inlet is connected to the flue of the boiler, and a third flue gas outlet is connected with the first flue gas inlet; the liquid inlet of the high-temperature heat exchanger is connected with the outlet of the heat exchange pump, and the liquid outlet of the high-temperature heat exchanger is connected with the spraying port of the evaporation tower; a high-temperature flue gas outlet pipe is arranged on a flue between an economizer and an air preheater of the boiler and is connected to a flue gas inlet of the evaporation tower; the smoke outlet of the evaporation tower is connected with the smoke inlet of the desulfurizing tower.
Further, the low-temperature heat exchanger and the high-temperature heat exchanger are arranged into an integrated structure.
The utility model discloses at the during operation, the heat transfer pump spouts the evaporation tower with partial doctor solution after the heating of high temperature heat exchanger, and the evaporation tower is sent into a certain amount of high temperature flue gas to high temperature flue gas outlet pipe simultaneously, and in the evaporation tower, the doctor solution evaporates rapidly under the effect of high temperature flue gas, and the moisture after the evaporation together enters into the flue gas import of desulfurizing tower with the flue gas and carries out the desulfurization, and the dust that appears after the doctor solution evaporation falls into behind the lower extreme of evaporation tower through the ash discharge mouth and discharges.
Adopt the utility model discloses, when the solid matter in with the doctor solution is appeared, moisture in the doctor solution forms steam, then steam enters into desulphurization unit well cyclic utilization again through the flue gas import of desulfurizing tower, has reached the effect of desulfurization waste water zero release.
Description of the drawings:
fig. 1 is a schematic diagram of an embodiment of the present invention.
The labels in the figure are:
2-economizer, 3-air preheater, 5-high temperature heat exchanger, 6-low temperature heat exchanger, 7-evaporation tower, 8-desulfurizing tower, 9-dust remover, 10-flue gas reheater, 11-chimney, 21-high temperature flue gas eduction tube, 52-desulfurizing liquid pool, 55-heat exchange pump, 62-fan, 64-low temperature air inlet pipe, 65-high temperature return air pipe.
The specific implementation mode is as follows:
example 1:
referring to fig. 1, a boiler flue gas waste heat utilization system is used for a boiler flue gas desulfurization device, and comprises a low-temperature heat exchanger 6, a flue gas reheater 10, a dust remover 9 and a fan 62; the low-temperature heat exchanger 6 is provided with a first flue gas inlet, a first flue gas outlet, a first air inlet and a first air outlet; the flue gas reheater 10 is provided with a second flue gas inlet, a second flue gas outlet, a second air inlet and a second air outlet; the low-temperature heat exchanger 6 is connected to a flue behind an air preheater 3 of the boiler; a flue gas outlet of a desulfurizing tower 8 of the boiler flue gas desulfurization device is sequentially connected with a dust remover 9 and a flue gas reheater 10; the first air inlet and the second air outlet are connected by a low-temperature air inlet pipe 64, and the first air outlet and the second air inlet are connected by a high-temperature air return pipe 65; the fan 62 is mounted on the high temperature return air duct 65.
Although the fan 62 could be mounted on the low temperature air inlet duct 64.
In order to provide the dust remover with a good moisture removing function, the dust remover 9 preferably adopts a wet electric dust remover.
The utility model discloses at the during operation, the air after fan 62 will be heated in low temperature heat exchanger 6 is sent into the flue gas reheater 10 behind the dust remover 9, heats the flue gas after the desulfurization, because the flue gas after the desulfurization has reduced the moisture that contains by a wide margin behind the dust remover, makes sulfur trioxide content in the flue gas also synchronous reduce by a wide margin, therefore the acid dew point temperature of flue gas is reduced to below 80 ℃ effectively; the flue gas is heated to 80-90 ℃ in the flue gas reheater 10, so that the dewing corrosion phenomenon in the chimney 11 is greatly reduced or even does not occur.
Among the prior art that compares, need utilize other heat energy to promote the flue gas after the desulfurization to between 140 ~ 160 ℃ by about 50 ℃, just enable the temperature of flue gas and be higher than acid dew point temperature, the utility model discloses utilize the flue gas self heat energy before the desulfurization to heat the flue gas after the desulfurization, no longer need additionally provide heat energy and heat the flue gas after the desulfurization, have the huge advantage of energy saving.
The boiler flue gas waste heat utilization system also comprises a high-temperature heat exchanger 5, an evaporation tower 7 and a heat exchange pump 55; the high-temperature heat exchanger 5 is provided with a third flue gas inlet, a third flue gas outlet, a liquid inlet and a liquid outlet; the evaporation tower 7 is provided with a smoke inlet, a spraying port, a smoke outlet and an ash discharge port; the high-temperature heat exchanger 5 is installed on a flue between the low-temperature heat exchanger 6 and the air preheater 3 in series, wherein a third flue gas inlet is connected to the flue of the boiler, and a third flue gas outlet is connected with the first flue gas inlet; the liquid inlet of the high-temperature heat exchanger 5 is connected with the outlet of the heat exchange pump 55, and the liquid outlet is connected with the spray opening of the evaporation tower 7; a high-temperature flue gas outlet pipe 21 is arranged on a flue between the economizer 2 and the air preheater 3 of the boiler, and the high-temperature flue gas outlet pipe 21 is connected to a flue gas inlet of the evaporation tower 7; the smoke outlet of the evaporation tower 7 is connected with the smoke inlet of the desulfurizing tower 8.
In order to reduce the manufacturing cost and facilitate the installation, the low-temperature heat exchanger 6 and the high-temperature heat exchanger 5 can be designed into an integrated structure.
The utility model discloses at the during operation, the heat transfer pump 55 spouts partial doctor solution into evaporation tower 7 after 5 heats of high temperature heat exchanger, and evaporation tower 7 is sent into a certain amount of high temperature flue gas to high temperature flue gas outlet pipe 21 simultaneously, and in evaporation tower 7, the doctor solution evaporates rapidly under the effect of high temperature flue gas, and the moisture after the evaporation together enters into the flue gas import of desulfurizing tower 8 with the flue gas and carries out the desulfurization, and the dust that appears after the doctor solution evaporation falls into behind the lower extreme of evaporation tower 7 through the ash discharge mouth and discharges.
Adopt the utility model discloses, when the solid matter in with the doctor solution is appeared, moisture in the doctor solution forms steam, then steam enters into desulphurization unit well cyclic utilization again through the flue gas import of desulfurizing tower, has reached the effect of desulfurization waste water zero release.
Claims (4)
1. The utility model provides a boiler flue gas waste heat utilization system which is used for boiler flue gas desulphurization unit, the characteristic is: comprises a low-temperature heat exchanger, a smoke reheater, a dust remover and a fan; wherein,
the low-temperature heat exchanger is provided with a first flue gas inlet, a first flue gas outlet, a first air inlet and a first air outlet;
the smoke reheater is provided with a second smoke inlet, a second smoke outlet, a second air inlet and a second air outlet;
the low-temperature heat exchanger is connected to a flue behind an air preheater of the boiler;
a flue gas outlet of a desulfurizing tower of the boiler flue gas desulfurization device is sequentially connected with a dust remover and a flue gas reheater;
the first air inlet and the second air outlet are connected by a low-temperature air inlet pipe, and the first air outlet and the second air inlet are connected by a high-temperature air return pipe;
the fan is arranged on the low-temperature air inlet pipe or the high-temperature air return pipe.
2. The boiler flue gas waste heat utilization system according to claim 1, characterized in that: the dust remover is a wet-type electric dust remover.
3. The boiler flue gas waste heat utilization system according to claim 1, characterized in that: the system also comprises a high-temperature heat exchanger, an evaporation tower and a heat exchange pump;
the high-temperature heat exchanger is provided with a third flue gas inlet, a third flue gas outlet, a liquid inlet and a liquid outlet;
the evaporation tower is provided with a smoke inlet, a spraying port, a smoke outlet and an ash discharge port;
the high-temperature heat exchanger is installed on a flue between the low-temperature heat exchanger and the air preheater in series, wherein a third flue gas inlet is connected to the flue of the boiler, and a third flue gas outlet is connected with the first flue gas inlet; the liquid inlet of the high-temperature heat exchanger is connected with the outlet of the heat exchange pump, and the liquid outlet of the high-temperature heat exchanger is connected with the spraying port of the evaporation tower;
a high-temperature flue gas outlet pipe is arranged on a flue between an economizer and an air preheater of the boiler and is connected to a flue gas inlet of the evaporation tower; the smoke outlet of the evaporation tower is connected with the smoke inlet of the desulfurizing tower.
4. The boiler flue gas waste heat utilization system according to claim 3, characterized in that: the low-temperature heat exchanger and the high-temperature heat exchanger are of an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520514599.0U CN204786491U (en) | 2015-07-15 | 2015-07-15 | Boiler smoke waste -heat application system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520514599.0U CN204786491U (en) | 2015-07-15 | 2015-07-15 | Boiler smoke waste -heat application system |
Publications (1)
| Publication Number | Publication Date |
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| CN204786491U true CN204786491U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520514599.0U Active CN204786491U (en) | 2015-07-15 | 2015-07-15 | Boiler smoke waste -heat application system |
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| CN (1) | CN204786491U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106219895A (en) * | 2016-09-06 | 2016-12-14 | 大唐环境产业集团股份有限公司 | A kind of water treatment facilities utilizing fume afterheat and method for treating water |
| CN106225522A (en) * | 2016-07-20 | 2016-12-14 | 杭州佰强能源科技有限公司 | A kind of flue gas and flue gas heat-exchange unit and heat-exchange system |
| CN106365232A (en) * | 2016-11-15 | 2017-02-01 | 青岛达能环保设备股份有限公司 | Low-temperature sprinkling and evaporation treatment method for desulfurization waste water |
| CN107321181A (en) * | 2017-08-27 | 2017-11-07 | 佛山市亚科恒远科技有限公司 | A kind of flue gas processing device |
| CN107349785A (en) * | 2017-08-27 | 2017-11-17 | 佛山市亚科恒远科技有限公司 | A kind of Multifunctional tobacco gas processing system |
| CN108619871A (en) * | 2017-03-23 | 2018-10-09 | 中国石油化工股份有限公司 | A kind of processing method and processing device of flue gas and flue gas desulfurization waste-water |
| CN109798784A (en) * | 2019-03-20 | 2019-05-24 | 洛阳森德石化工程有限公司 | A kind of catalytic cracking unit desulfurization fume heat exchange takes the heat-exchanging process of hot systems |
| CN110038414A (en) * | 2019-03-25 | 2019-07-23 | 华电电力科学研究院有限公司 | A kind of gas turbine flue gas denitrating system and method for denitration |
| CN112484062A (en) * | 2020-10-27 | 2021-03-12 | 中冶南方都市环保工程技术股份有限公司 | Energy-saving and emission-reducing system for tail flue gas of gas boiler |
-
2015
- 2015-07-15 CN CN201520514599.0U patent/CN204786491U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225522A (en) * | 2016-07-20 | 2016-12-14 | 杭州佰强能源科技有限公司 | A kind of flue gas and flue gas heat-exchange unit and heat-exchange system |
| CN106219895A (en) * | 2016-09-06 | 2016-12-14 | 大唐环境产业集团股份有限公司 | A kind of water treatment facilities utilizing fume afterheat and method for treating water |
| CN106365232A (en) * | 2016-11-15 | 2017-02-01 | 青岛达能环保设备股份有限公司 | Low-temperature sprinkling and evaporation treatment method for desulfurization waste water |
| CN108619871A (en) * | 2017-03-23 | 2018-10-09 | 中国石油化工股份有限公司 | A kind of processing method and processing device of flue gas and flue gas desulfurization waste-water |
| CN108619871B (en) * | 2017-03-23 | 2020-09-11 | 中国石油化工股份有限公司 | Method and device for treating flue gas and flue gas desulfurization wastewater |
| CN107321181A (en) * | 2017-08-27 | 2017-11-07 | 佛山市亚科恒远科技有限公司 | A kind of flue gas processing device |
| CN107349785A (en) * | 2017-08-27 | 2017-11-17 | 佛山市亚科恒远科技有限公司 | A kind of Multifunctional tobacco gas processing system |
| CN109798784A (en) * | 2019-03-20 | 2019-05-24 | 洛阳森德石化工程有限公司 | A kind of catalytic cracking unit desulfurization fume heat exchange takes the heat-exchanging process of hot systems |
| CN110038414A (en) * | 2019-03-25 | 2019-07-23 | 华电电力科学研究院有限公司 | A kind of gas turbine flue gas denitrating system and method for denitration |
| CN110038414B (en) * | 2019-03-25 | 2023-05-09 | 华电电力科学研究院有限公司 | Gas turbine flue gas denitration system and denitration method |
| CN112484062A (en) * | 2020-10-27 | 2021-03-12 | 中冶南方都市环保工程技术股份有限公司 | Energy-saving and emission-reducing system for tail flue gas of gas boiler |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 211101 Room 401, No. 1, Huashen Avenue, Yuhua District, Nanjing, Jiangsu Province Patentee after: Guoneng Longyuan environmental protection Nanjing Co.,Ltd. Address before: No. 10-2, Yuhua South Road, Yuhua District, Nanjing, Jiangsu 210012 Patentee before: NANJING LONGYUAN ENVIRONMENT Co.,Ltd. |