CN211159275U - Efficient flue gas desulfurization and white removal system for spraying desulfurizer into original flue - Google Patents
Efficient flue gas desulfurization and white removal system for spraying desulfurizer into original flue Download PDFInfo
- Publication number
- CN211159275U CN211159275U CN201921938614.9U CN201921938614U CN211159275U CN 211159275 U CN211159275 U CN 211159275U CN 201921938614 U CN201921938614 U CN 201921938614U CN 211159275 U CN211159275 U CN 211159275U
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- Prior art keywords
- flue
- slurry
- desulfurization
- spraying
- cooling
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 89
- 230000023556 desulfurization Effects 0.000 title claims abstract description 89
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000003546 flue gas Substances 0.000 title claims abstract description 39
- 238000005507 spraying Methods 0.000 title claims description 43
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 239000007921 spray Substances 0.000 claims abstract description 29
- 239000002002 slurry Substances 0.000 claims description 103
- 238000001816 cooling Methods 0.000 claims description 45
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 24
- 239000000920 calcium hydroxide Substances 0.000 claims description 23
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 16
- 238000002360 preparation method Methods 0.000 claims description 12
- 230000002087 whitening effect Effects 0.000 claims description 10
- 235000019738 Limestone Nutrition 0.000 claims description 8
- 239000006028 limestone Substances 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 7
- 238000005536 corrosion prevention Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 9
- 235000019504 cigarettes Nutrition 0.000 abstract description 4
- 235000011116 calcium hydroxide Nutrition 0.000 description 18
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000007791 dehumidification Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010669 acid-base reaction Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a desulfurizer spouts into high-efficient desulfurization white system that disappears of flue gas of former flue, spray the layer, cool off including former flue, former flue nozzle, desulfurizing tower, thick liquid and spray devices such as layer, defroster, clean flue, chimney sleeve heater and constitute, the utility model provides a current thick liquid heat exchanger erode the corruption seriously, and desulfurization system is with high costs, desulfurization efficiency is low, can not eliminate the problem of white cigarette completely.
Description
Technical Field
The utility model relates to an industrial boiler flue gas emission environmental protection field, concretely relates to desulfurizer spouts into high-efficient desulfurization of flue gas of former flue and disappears white system.
Background
According to the national air pollution prevention and control plan, part of provincial and municipal environmental protection policies require that flue gas after desulfurization in a thermal power plant is subjected to cooling, dehumidification and whitening treatment, and the mainstream scheme of the conventional flue gas cooling and dehumidification is that the first layer of spraying slurry in a desulfurization tower is cooled through a wide-runner slurry heat exchanger. The first layer desulfurization of current desulfurization heat sink sprays the thick liquid flow too big, make thick liquid heat exchanger erode and corrode seriously, make desulfurization system resistance big, increase power consumption, and simultaneously, the wide volume that causes the heat exchanger of the heat exchanger thick liquid side flow path of current device is huge, and the investment cost is high, moreover, the current device desulfurizer directly adds the desulfurizing tower thick liquid pond and makes the effectual desulfurizer concentration of desulfurization thick liquid low, and reaction rate is slow, and the desulfurization degree is light, sulfur dioxide's emission concentration is high, consequently need a neotype device to solve current problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a desulfurizer spouts into high-efficient desulfurization of flue gas of former flue and disappears white system to solve the problem that proposes in the above-mentioned background art. In order to achieve the above object, the utility model provides a following technical scheme: a high-efficiency flue gas desulfurization and white elimination system for spraying a desulfurizer into an original flue comprises original flue nozzles, the original flue, a desulfurization tower and a slurry spraying layer, wherein two groups of the original flue nozzles are arranged in the original flue, the desulfurization tower is arranged at one end of the original flue, the slurry spraying layer is arranged in the desulfurization tower, a cooling spraying layer is arranged on the upper side of the slurry spraying layer, a demister is arranged on the upper side of the cooling spraying layer, a clean flue is arranged on the upper side of the desulfurization tower, a chimney is arranged at one end of the clean flue, which is far away from the desulfurization tower, a chimney sleeve heater is arranged at the top of the chimney, the chimney and the heater are welded and connected through a heater-wrapped chimney, a desulfurization slurry circulating pump is arranged on one side of the desulfurization tower, which is far away from the desulfurization tower, a slurry heat exchanger is arranged on one, the quantity of cooling slurry circulating pump is one to two, a cooling slurry circulating pump can be connected for two-layer cooling spraying layer through setting up the tee bend, cooling slurry circulating pump is kept away from desulfurizing tower one side is provided with the calcium hydrate thick liquid pump, calcium hydrate thick liquid pump downside is provided with the calcium hydrate thick liquid preparation pond, be provided with the cooling water runner in the thick liquid heat exchanger, be provided with the desulfurization thick liquid runner between the cooling water runner.
Furthermore, the primary flue nozzle group is connected with the slurry spraying layer through a three-way pipeline, and the primary flue nozzles are three-layer.
Preferably, the other group of the raw flue nozzles is connected with the pipeline of the limestone pulping system, and the raw flue nozzles have one layer.
Preferably, the inside of the original flue is provided with 2205 stainless steel plate lining for corrosion prevention, the original flue is designed to have a gradient of 5%, and the bottom of the original flue is provided with a flushing water pipeline.
Preferably, the original flue is connected with the desulfurizing tower through a bolt, the desulfurizing tower is connected with the slurry spraying layer through a clamping groove, and the slurry spraying layer has four to five layers.
Preferably, the cooling spray layer is connected with the desulfurizing tower through a clamping groove, the cooling spray layer has one to two layers, and the demister is connected with the desulfurizing tower through a supporting beam.
Preferably, the demister comprises three layers, the desulfurizing tower is connected with the clean flue through bolts, and the clean flue is connected with the chimney through bolts.
Preferably, the number of the desulfurization circulating pumps is four to five, and the width of the flow channel of the desulfurization slurry heat exchanger is 12 mm.
Preferably, the cooling slurry circulating pump is connected with the slurry heat exchanger through a rubber-lined pipeline.
Preferably, the inlet of the calcium hydroxide slurry pump is connected with the calcium hydroxide slurry preparation tank through a pipeline, and the outlet of the calcium hydroxide slurry pump is connected with the cooling slurry spraying layer through a pipeline.
Preferably, the upper part of the desulfurizing tower (4), the clean flue (5) and the chimney (14) are not provided with (dismantled) heat preservation.
Compared with the prior art, the beneficial effects of the utility model are that:
1. for solving current device desulfurizer limestone slurry adds desulfurizing tower thick liquid pond, effective desulfurizer concentration is low in the desulfurizing slurry, the slow problem of reaction rate, the utility model discloses a set up two sets of thick liquid nozzle at former flue, a set of nozzle is sprayed the female pipe in the thick liquid circulating pump export on layer by the lower part thick liquid and is set up DN600 tee bend supply and spray the thick liquid, another group's nozzle sprays the desulfurizing slurry by the supply of limestone slurrying system, because of supplementary limestone slurry concentration is more than 20 times than effective limestone slurry concentration in the desulfurizing tower thick liquid, make desulfurization efficiency obtain improving, realize carrying out first desulfurization in former flue space, the flue gas is 20% of desulfurizing tower reaction space for the first time in former flue desulfurization space, because of the reaction space increases the corresponding improvement 20% of desulfurization efficiency. After the desulfurization slurry is sprayed into the original flue, the purposes of reducing the temperature of the flue gas and ensuring the safe operation of the desulfurization tower are achieved.
2. Spray the thick liquid flow too big for solving current desulfurization heat sink first layer desulfurization for desulfurization system resistance is big, increases power consumption's problem, the utility model discloses a spray layer thick liquid circulating pump outlet pipe with first layer desulfurization and set up the tee bend and spray layer supply thick liquid for the two-layer desulfurization in upper portion and spray, or set up one to two small discharge cooling slurry circulating pumps, every layer flow sprays for about 50% of former flow, reduces the thick liquid flow, reduces desulfurization system resistance, reduces the heat exchanger and erodes corrosion rate, reduces power consumption.
3. The wide problem that causes the heat exchanger of bulky, the investment cost is high of heat exchanger thick liquid side runner for solve current device, the utility model discloses a desulfurization thick liquid runner of the 12mm width that sets up for the thick liquid width narrows down, reduces the heat exchanger volume, reduces investment cost.
4. For solving current device desulfurization degree light, the high problem of sulfur dioxide's emission concentration, the utility model discloses a cooling that sets up sprays layer, calcium hydrate thick liquid pump and calcium hydrate thick liquid preparation pond, adds the cooling with calcium hydrate solution and sprays the layer and improve the cooling and spray the sulfur dioxide production reaction rate in layer thick liquid PH value and the flue gas and accelerate, improves desulfurization efficiency, can reduce sulfur dioxide's concentration in the flue gas to below 3.5mg/m3, makes desulfurization efficiency reach 99.9%.
5. Big for the humidity of discharging fume after solving the desulfurization, white cigarette problem winter, the utility model discloses a do not set up or demolish desulfurizing tower upper portion, clean flue and chimney and keep warm, realize the cooling dehumidification of desulfurization flue gas, alleviate the white cigarette problem of flue gas.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a demister; 2. cooling the spray layer; 3. a slurry spray layer; 4. a desulfurizing tower; 5. cleaning a flue; 6. a heater; 7. a desulfurization circulating pump; 8. a slurry heat exchanger; 9. a cooling slurry circulating pump; 10. a calcium hydroxide slurry pump; 11. a calcium hydroxide slurry preparation tank; 12. a cooling water flow passage; 13. a desulfurization slurry runner; 14. a chimney; 15. an original flue; 16 raw flue nozzles.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a high-efficiency desulfurization and white elimination system for flue gas sprayed into an original flue by a desulfurizer comprises an original flue 15, original flue nozzles 16, a desulfurization tower 4 and a slurry spraying layer 3, wherein one end of the original flue 15 is provided with the desulfurization tower 4, the original flue nozzles 16 are divided into two groups, one group is provided with a three-way connecting pipe for supplying spraying slurry through an outlet pipeline of a slurry circulating pump, the other group is provided with desulfurization slurry through a limestone pulping system, the flue gas is subjected to primary desulfurization in the original flue, sulfur dioxide can be further removed in the desulfurization tower 4, the slurry spraying layer 3 is arranged in the desulfurization tower 4, the slurry sprayed by the desulfurization circulating pump can be continuously and circularly sprayed by the slurry spraying layer 3, the sulfur dioxide is absorbed, a cooling spraying layer 2 is arranged on the upper side of the slurry spraying layer 3, a demister 1 is arranged on the upper side of the cooling spraying layer 2, and a, the clean flue 5 can pass the desulfurized flue gas, one end of the clean flue 5, which is far away from the desulfurizing tower 4, is provided with a chimney 14, the chimney 14 can discharge the desulfurized flue gas, the top of the chimney 14 is provided with a chimney sleeve heater 6, the heater 6 can discharge white smoke when heating, the chimney 14 is connected with the heater 6 by welding the heater wrapped chimney, one side of the desulfurizing tower 4, which is far away from the original flue 15, is provided with a desulfurizing circulating pump 7, the inlet of the desulfurizing circulating pump 7 is connected with a slurry pool at the lower part of the desulfurizing tower 4, one side of the desulfurizing circulating pump 7, which is far away from the desulfurizing tower 4, is provided with a slurry heat exchanger 8, the temperature of the slurry is reduced by the slurry heat exchanger 8, the flow of the slurry heat exchanger 8 is smaller than that of the conventional design, only one third to one half of the flow of the conventional design is needed, and because of the flow reduction makes the speed of slurry heat exchanger 8 erosion corrosion greatly reduced, 8 downside of slurry heat exchanger are provided with cooling slurry circulating pump 9, cooling slurry circulating pump 9 entry is connected with desulfurizing tower 4 lower part slurry pond, export is connected with cooling after-stream slurry heat exchanger 8 and sprays layer 2 and is connected, the quantity of cooling slurry circulating pump 9 is one to two, the desulfurization thick liquid forms incessant circulation through cooling slurry circulating pump 9 and sprays, carry out the desulfurization once more, cooling slurry circulating pump 9 keeps away from desulfurizing tower 4 one side and is provided with calcium hydroxide thick liquid pump 10, calcium hydroxide thick liquid pump 10 downside is provided with calcium hydroxide thick liquid preparation pond 11, be provided with coolant runner 12 in the slurry heat exchanger 8, be provided with desulfurization thick liquid runner 13 between the coolant runner 12, slurry heat exchanger 8 can be replaced with the air cooling radiator.
The system comprises a primary flue nozzle 16 group, a primary flue nozzle 15 group, a desulfurizing tower 4 group, a slurry spraying layer 3 group, a cooling spraying layer 2, a desulfurizing tower 4 group, a slurry pump, a cooling slurry circulating pump 9, a slurry heat exchanger 8, a calcium hydroxide slurry pump 10, a slurry preparation pool 11 group, a slurry supply pump, a slurry spraying system, a slurry feeding system, a slurry spraying system, a desulfurization limestone slurry feeding system, a primary flue 15 group, a desulfurization tower 4 group, a slurry spraying system, a cooling spraying system, a desulfurization tower, a cooling slurry circulating pump, a slurry preparation pool, a slurry preparation system and a slurry preparation system.
The utility model provides a desulfurizer spouts into high-efficient desulfurization of flue gas of former flue and disappears white system device's theory of operation: when in use, flue gas from a boiler enters an original flue, primary desulfurization is carried out through reaction with desulfurization slurry sprayed by an original flue nozzle, the flue gas after primary desulfurization enters a desulfurization tower 4 through an original flue 15, desulfurization slurry in the desulfurization tower 4 is pumped into a slurry spraying layer 3 by a desulfurization circulating pump 7, sulfur dioxide in the slurry and the flue gas is absorbed for secondary desulfurization after being sprayed out through the slurry spraying layer 3, water in the desulfurization tower 4 is pumped into a slurry heat exchanger 8 by a cooling slurry circulating pump 9, the slurry is cooled by the slurry heat exchanger 8 after entering a cooling water flow passage 12 through external cooling water, the size of a desulfurization slurry flow passage 13 is reduced, the volume of the slurry heat exchanger 8 is reduced, the investment cost is reduced, a calcium hydroxide solution in a calcium hydroxide slurry preparation pool 11 is pumped into the cooling spraying layer 2 by a calcium hydroxide slurry pump 10 and is sprayed out through the cooling spraying layer 2, calcium hydrate solution and the sulfur dioxide in the flue gas carry out acid-base reaction, can further desulfurize the flue gas, improve desulfurization efficiency to 99.9%, the volume of spraying that the cooling sprayed layer 2 set up to spray one-third to one-half of volume under the normal condition, make the volume of spraying reduce, and then reduce desulfurization system's resistance, reduce thick liquid heat exchanger erosion and corrosion, reduce power consumption, flue gas after the desulfurization passes through clean flue 5 and enters into the chimney 14, the flue gas dispels the heat at clean flue and chimney wall, aqueous vapor flows to clean flue recycle after the chimney wall condenses in the flue gas, the white cigarette of flue gas after the cooling dehumidifies alleviates, discharge through chimney 14. If the white smoke needs to be completely eliminated, low-quality steam is introduced into the chimney sleeve heater, and the smoke is heated by utilizing steam condensation heat, so that the white smoke in the smoke is completely eliminated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a high-efficient desulfurization of flue gas that desulfurizer spout into former flue disappears white system which characterized in that: spray layer (3) including former flue (15), former flue nozzle (16), desulfurizing tower (4) and thick liquid, former flue (15) one end is provided with desulfurizing tower (4), be provided with in desulfurizing tower (4) thick liquid sprays layer (3), thick liquid sprays layer (3) upside and is provided with the cooling and sprays layer (2), the cooling sprays layer (2) upside and is provided with defroster (1), desulfurizing tower (4) upside is provided with clean flue (5), clean flue (5) are kept away from desulfurizing tower (4) one end is provided with chimney (14), chimney (14) top is equipped with chimney sleeve heater (6), chimney (14) with heater (6) pass through heater parcel chimney welding, desulfurizing tower (4) are kept away from former flue (15) one side is provided with desulfurization circulating pump (7), desulfurization circulating pump (7) are kept away from desulfurizing tower (4) one side is provided with thick liquid heat exchanger (8) The desulfurization slurry pump device is characterized in that a cooling slurry circulating pump (9) is arranged on the lower side of the slurry heat exchanger (8), the number of the cooling slurry circulating pumps (9) is one to two, the cooling slurry circulating pump (9) is far away from one side of the desulfurization tower (4) and is provided with a calcium hydroxide slurry pump (10), a calcium hydroxide slurry preparation pool (11) is arranged on the lower side of the calcium hydroxide slurry pump (10), a cooling water flow channel (12) is arranged in the slurry heat exchanger (8), and a desulfurization slurry flow channel (13) is arranged between the cooling water flow channel (12).
2. The high-efficiency flue gas desulfurization and whitening system for spraying a desulfurizing agent into an original flue according to claim 1, characterized in that: former flue (15) with desulfurizing tower (4) pass through bolted connection, desulfurizing tower (4) with thick liquid sprays layer (3) and passes through the draw-in groove and connect, thick liquid sprays layer (3) and has four to five layers.
3. The high-efficiency flue gas desulfurization and whitening system for spraying a desulfurizing agent into an original flue according to claim 1, characterized in that: the cooling sprays layer (2) with desulfurizing tower (4) are connected through the draw-in groove, the cooling sprays layer (2) and has one to two-layer, defroster (1) with desulfurizing tower (4) are connected through a supporting beam.
4. The high-efficiency flue gas desulfurization and whitening system for spraying a desulfurizing agent into an original flue according to claim 1, characterized in that: the demister (1) has three layers, the desulfurizing tower (4) is connected with the clean flue (5) through bolts, and the clean flue (5) is connected with the chimney (14) through bolts.
5. The high-efficiency flue gas desulfurization and whitening system for spraying a desulfurizing agent into an original flue according to claim 1, characterized in that: and the cooling slurry circulating pump (9) is connected with the slurry heat exchanger (8) through a rubber-lined pipeline.
6. The high-efficiency flue gas desulfurization and whitening system for spraying a desulfurizing agent into an original flue according to claim 1, characterized in that: the calcium hydroxide slurry pump (10) is connected with the calcium hydroxide slurry preparation pool (11) through a pipeline.
7. The high-efficiency flue gas desulfurization and whitening system for spraying a desulfurizing agent into an original flue according to claim 1, characterized in that: the primary flue nozzle (16) is connected with the slurry spraying layer (3) through a pipeline.
8. The high-efficiency flue gas desulfurization and whitening system for spraying a desulfurizing agent into an original flue according to claim 1, characterized in that: the raw flue nozzle (16) is connected with a slurry supply pump of a limestone slurry making system through a pipeline.
9. The high-efficiency flue gas desulfurization and whitening system for spraying a desulfurizing agent into an original flue according to claim 1, characterized in that: the original flue (15) is lined with 2205 stainless steel for corrosion prevention, and the original flue (15) is provided with a 5% gradient towards the desulfurizing tower.
10. The high-efficiency flue gas desulfurization and whitening system for spraying a desulfurizing agent into an original flue according to claim 1, characterized in that: the upper part of the desulfurizing tower (4), the clean flue (5) and the chimney (14) are not provided with heat preservation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921938614.9U CN211159275U (en) | 2019-11-12 | 2019-11-12 | Efficient flue gas desulfurization and white removal system for spraying desulfurizer into original flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921938614.9U CN211159275U (en) | 2019-11-12 | 2019-11-12 | Efficient flue gas desulfurization and white removal system for spraying desulfurizer into original flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211159275U true CN211159275U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921938614.9U Expired - Fee Related CN211159275U (en) | 2019-11-12 | 2019-11-12 | Efficient flue gas desulfurization and white removal system for spraying desulfurizer into original flue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211159275U (en) |
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2019
- 2019-11-12 CN CN201921938614.9U patent/CN211159275U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211220 Address after: 253000 room 410, block a, Donghui building, East Sanba Road, Changhe sub district office, Dezhou Economic and Technological Development Zone, Shandong Province Patentee after: Shandong Jingqing energy saving and Environmental Protection Technology Co.,Ltd. Address before: No. 4-3235 Shunhe Street, Puping County, Liaocheng City, Shandong Province, 252100 Patentee before: Li Shenqiang |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200804 |
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| CF01 | Termination of patent right due to non-payment of annual fee |