CN110563171B - Equipment is eliminated to sewage treatment aeration tank foam - Google Patents
Equipment is eliminated to sewage treatment aeration tank foam Download PDFInfo
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- CN110563171B CN110563171B CN201910862804.5A CN201910862804A CN110563171B CN 110563171 B CN110563171 B CN 110563171B CN 201910862804 A CN201910862804 A CN 201910862804A CN 110563171 B CN110563171 B CN 110563171B
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- plate
- furling
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- foam
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a foam eliminating device for a sewage treatment aeration tank, which comprises a translation mechanism and a connecting mechanism, wherein the connecting mechanism is arranged on the inner side of the lower end of the translation mechanism, the translation mechanism comprises a translation motor, a translation frame, connecting strips, pulleys, rotating rods, guide sleeve plates and a bottom limiting plate, two rotating rods are arranged at one end of the translation motor, the pulleys are arranged on the outer sides of the two ends of each rotating rod, the connecting strips are arranged on the outer sides of the middle parts of the rotating rods, the translation frame is arranged on the upper end surface of each connecting strip, the foam eliminating motor is arranged on the upper end surface of the translation frame, five guide sleeve plates are arranged on the inner side of the translation frame, the bottom limiting plate is arranged on the lower end surface of one guide sleeve plate, and a slide rail is arranged on the lower end surfaces of the two pulleys. According to the invention, the foam generated in the aeration tank is eliminated, so that the operation safety is improved, the foam generation amount is effectively controlled, and the effluent quality is ensured.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a foam eliminating device for a sewage treatment aeration tank.
Background
Along with the rapid development of social economy, people's life and industrial waste water are more and more, sewage treatment is more and more taken more and more attention, in the sewage treatment process, the aeration tank carries out aeration treatment, the aeration tank is a biochemical reactor designed according to the characteristics of microorganisms, the degradation degree of organic pollutants mainly depends on the aeration reaction conditions designed by people, the aeration tank carries out sewage treatment by using an activated sludge method, a certain sewage retention time is provided in the tank, and the oxygen quantity required by aerobic microorganisms and the mixing conditions of full contact of sewage and activated sludge are met.
However, the existing aeration tank has foaming phenomenon, which affects the operation of sewage treatment and the quality of effluent water, and excessive foam can pollute the environment and cause operation danger; therefore, the existing requirements are not met, and a foam eliminating device of the aeration tank for sewage treatment is provided.
Disclosure of Invention
The invention aims to provide a foam eliminating device for an aeration tank for sewage treatment, which aims to solve the problems that the existing aeration tank in the background art has foaming phenomenon, influences the operation of sewage treatment and the effluent quality, pollutes the environment due to excessive foam, causes operation danger and the like.
In order to achieve the purpose, the invention provides the following technical scheme: a sewage treatment aeration tank foam eliminating device comprises a translation mechanism and a connecting mechanism, wherein the connecting mechanism is installed on the inner side of the lower end of the translation mechanism, the translation mechanism comprises a translation motor, a translation frame, connecting strips, pulleys, rotating rods, guide sleeve plates and bottom limiting plates, two rotating rods are installed at one end of the translation motor, the pulleys are installed on the outer sides of the two ends of each rotating rod, the connecting strips are installed on the outer sides of the middle parts of the rotating rods, the translation frame is installed on the upper end face of each connecting strip, a foam eliminating motor is installed on the upper end face of the translation frame, five guide sleeve plates are installed on the inner side of the translation frame, the bottom limiting plate is installed on the lower end face of one guide sleeve plate, slide rails are installed on the lower end faces of the two pulleys, and an aeration tank body is installed on the lower end faces of the slide rails;
the connecting mechanism comprises connecting columns, a height adjusting plate and end guide plates, five connecting columns are installed on the upper end face of the height adjusting plate, and the end guide plates are installed at two ends of the height adjusting plate.
Preferably, one side of the end guide plate is provided with a furling connecting plate, one end of the furling connecting plate is provided with a furling plate, the inner side of the furling connecting plate is provided with a shifting mechanism, the shifting mechanism comprises a shifting shaft, stirring blades and crushing rods, seven crushing rods are arranged on the outer side of the shifting shaft, the stirring blades are arranged on the outer side of the crushing rods, and one side of the shifting mechanism is provided with a screw rod.
Preferably, the mechanism of drawing water is installed to the up end of translation frame, the mechanism of drawing water includes spray box, box backup pad, connecting pipe and water pump, the connecting pipe is installed to the up end of water pump, the spray box is installed to the one end of connecting pipe, the box backup pad is installed to one side of spray box.
Preferably, one side of translation frame is provided with motor mounting bracket, translation motor passes through the screwed connection and fixes the inboard at motor mounting bracket, one of them the one end of rotary rod is passed through the shaft coupling and is connected with translation motor's one end, the connecting strip passes through the bearing with the rotary rod and is connected fixedly, translation frame passes through screwed connection and fixes the up end at the connecting strip.
Preferably, uide bushing board welded fastening is in the inboard of translation frame, the inboard of uide bushing board is provided with the guiding hole, the upper end setting of spliced pole is in the inboard of guiding hole, altitude mixture control board welded fastening is at the lower terminal surface of spliced pole, the tip baffle passes through the both ends of screw connection fixation at altitude mixture control board.
Preferably, the two ends of the shifting shaft are arranged on the inner side of the furling connecting plate, the furling plate is welded and fixed at one end of the furling connecting plate, one side of the furling plate is provided with a filter hole, the inner side of the other end of the furling connecting plate is provided with a threaded hole, and the furling connecting plate is in threaded connection with the screw rod.
Preferably, the stirring blade is fixed on the outer side of the stirring shaft in a welding mode, the inner side of the stirring blade is provided with a positioning hole, and the crushing rod is arranged on the inner side of the positioning hole.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the height of the connecting mechanism is adjusted according to the sewage level in the aeration tank, the translation motor drives the rotating rod to rotate, the pulley rotates on the upper end surface of the sliding rail to drive the translation mechanism to translate, so that areas with more generated foam are eliminated, the screw thread turning directions of the two furling connecting plates are opposite, so that the two furling connecting plates move oppositely under the rotation driving of the screw rod, and the foam is furled through the furling plate;
2. the stirring shaft is driven by the screw through the belt to rotate, so that the stirring blades and the crushing rod stir and eliminate the collected foam, the stirring shaft plays a certain role in supporting and guiding the collected connecting plate, the stability of the collected plate in the collection process is improved, and the stirring shaft is sprayed on the collected foam through the spraying opening to break the foam.
Drawings
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a schematic view of a portion of the translation mechanism of the present invention;
FIG. 3 is a schematic view of a partial cross-sectional structure of the coupling mechanism of the present invention;
fig. 4 is a partial sectional view schematically showing the structure of the guide sleeve plate of the present invention.
In the figure: 1. a tank body of an aeration tank; 2. a slide rail; 3. a translation mechanism; 301. a translation motor; 302. a translation frame; 303. a connecting strip; 304. a pulley; 305. rotating the rod; 306. a guide sleeve plate; 307. a bottom limiting plate; 4. a water pumping mechanism; 401. a water spraying tank; 402. a box body supporting plate; 403. a connecting pipe; 404. a water pump; 5. a connecting mechanism; 501. connecting columns; 502. a height adjustment plate; 503. an end guide plate; 6. collecting the connecting plate; 7. collecting the plate; 8. a screw; 9. a toggle mechanism; 901. a shifting shaft; 902. a stirring blade; 903. a breaking bar; 10. a foam eliminating motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The translation motor 301 (model YS-7134), the water pump 404 (model XBD-W) and the foam elimination motor 10 (model YDYP11-6-2.2 KW) can be purchased from the market or customized by a person.
Referring to fig. 1 to 4, an embodiment of the present invention includes: a sewage treatment aeration tank foam eliminating device comprises a translation mechanism 3 and a connecting mechanism 5, wherein the connecting mechanism 5 is installed on the inner side of the lower end of the translation mechanism 3, the translation mechanism 3 comprises a translation motor 301, a translation frame 302, a connecting bar 303, pulleys 304, rotating bars 305, guide sleeve plates 306 and a bottom limiting plate 307, two rotating bars 305 are installed at one end of the translation motor 301, the pulleys 304 are installed on the outer sides of two ends of each rotating bar 305, the connecting bar 303 is installed on the outer side of the middle part of each rotating bar 305, the translation frame 302 is installed on the upper end surface of each connecting bar 303, a foam eliminating motor 10 is installed on the upper end surface of each translation frame 302, five guide sleeve plates 306 are installed on the inner side of each translation frame 302, the height of each connecting bar 501 can be adjusted through the guide sleeve plates 306, the aeration tank is suitable for different liquid levels, the bottom limiting plate 307 is installed on the lower end surface of one guide sleeve plate 306, slide rails 2 are installed on the lower end surfaces of two slide rails 304, the translation mechanism 3 can be driven to integrally translate on the upper end surfaces of the slide rails 2 through the rotation of the slide rails 304, and an aeration tank body 1 is installed on the lower end surfaces of the slide rails 2;
Further, a furling connecting plate 6 is installed on one side of the end portion guide plate 503, a furling plate 7 is installed on one end of the furling connecting plate 6, a toggle mechanism 9 is installed on the inner side of the furling connecting plate 6, the toggle mechanism 9 comprises a toggle shaft 901, stirring blades 902 and crushing rods 903, seven crushing rods 903 are installed on the outer side of the toggle shaft 901, the stirring blades 902 are installed on the outer side of the crushing rods 903, and a screw 8 is installed on one side of the toggle mechanism 9.
By adopting the technical scheme, the foam after being collected can be timely broken and eliminated by the toggle mechanism 9.
Further, the upper end face of the translation frame 302 is provided with a water pumping mechanism 4, the water pumping mechanism 4 comprises a water spraying tank 401, a tank body supporting plate 402, a connecting pipe 403 and a water pump 404, the connecting pipe 403 is arranged on the upper end face of the water pump 404, the water spraying tank 401 is arranged at one end of the connecting pipe 403, and the tank body supporting plate 402 is arranged at one side of the water spraying tank 401.
By adopting the technical scheme, water in the sewage tank can be pumped and then sprayed on the collected foam, and water drops impact on the foam to break the foam.
Further, a motor mounting rack is arranged on one side of the translation frame 302, the translation motor 301 is fixed on the inner side of the motor mounting rack through screw connection, one end of one rotating rod 305 is connected with one end of the translation motor 301 through a coupler, the connecting bar 303 is fixedly connected with the rotating rod 305 through a bearing, and the translation frame 302 is fixed on the upper end face of the connecting bar 303 through screw connection.
By adopting the technical scheme, the translation mechanism 3 can be driven to integrally translate on the upper end face of the sliding rail 2 through the rotation of the pulley 304.
Further, a guide sleeve plate 306 is welded and fixed on the inner side of the translation frame 302, a guide hole is formed in the inner side of the guide sleeve plate 306, the upper end of the connecting column 501 is arranged on the inner side of the guide hole, a height adjusting plate 502 is welded and fixed on the lower end face of the connecting column 501, and an end guide plate 503 is fixed at two ends of the height adjusting plate 502 through screws.
Through adopting above-mentioned technical scheme, can adjust the height of spliced pole 501 through uide bushing board 306, and then be applicable to different liquid levels.
Further, two ends of the shifting shaft 901 are arranged on the inner side of the furling connecting plate 6, the furling plate 7 is welded and fixed at one end of the furling connecting plate 6, one side of the furling plate 7 is provided with a filter hole, the inner side of the other end of the furling connecting plate 6 is provided with a threaded hole, and the furling connecting plate 6 is in threaded connection with the screw rod 8.
Through adopting above-mentioned technical scheme, draw in the connecting plate 6 and be connected with screw rod 8 through the screw thread, two screw threads that draw in the connecting plate 6 are revolved to opposite, are convenient for when screw rod 8 is rotatory, draw in the connecting plate 6 and can remove in opposite directions in two.
Further, the stirring blade 902 is fixed to the outer side of the stirring shaft 901 by welding, a positioning hole is provided in the inner side of the stirring blade 902, and the crushing rod 903 is provided in the inner side of the positioning hole.
By adopting the technical scheme, the collected foam is stirred and eliminated by the stirring blade 902 and the crushing rod 903.
The working principle is as follows: when in use, whether the functions of all parts are intact is checked, two sliding rails 2 are arranged on the upper end face of a tank body 1 of an aeration tank, the whole body translates on the sliding rails 2 through the rolling of pulleys 304, the height of a connecting mechanism 5 is adjusted according to the sewage level in the aeration tank, specifically, a connecting column 501 is fixed on the inner side of a guide sleeve plate 306 through screw connection, the connecting mechanism 5 is further fixed, a power supply is switched on, a translation motor 301 is started, the translation motor 301 drives a rotating rod 305 to rotate, the pulleys 304 rotate on the upper end face of the sliding rails 2 to drive a translation mechanism 3 to translate, the positions and areas with more generated foam are eliminated, a foam eliminating motor 10 is started, a belt pulley is arranged on the outer side of one end of the foam eliminating motor 10, the foam eliminating motor 10 drives a screw rod 8 to rotate through a belt, and the connecting plate 6 is collected and connected with the screw rod 8 through threads, the screw threads of the two furling connecting plates 6 are opposite in rotating direction, so that the two furling connecting plates move oppositely under the driving of the rotation of the screw rod 8, foams are furled through the furling plate 7, meanwhile, the screw rod 8 drives the stirring shaft 901 to rotate through a belt, so that the stirring blades 902 and the crushing rod 903 stir and eliminate the furled foams, the stirring shaft 901 plays a certain role in supporting and guiding the furling connecting plates 6, the stability of the furling plate 7 during furling is improved, the foam eliminating motor 10 is reversed after the furling connecting plates 6 are moved and furled again, the furling operation is repeated for a plurality of times to facilitate the elimination of the foams, the water pump 404 is started, so that the water pump 404 absorbs sewage in an aeration tank and injects the sewage into the inner side of the water spray tank 401 through the connecting pipe 403, the tank body supporting plate 402 plays a role in supporting the water spray tank 401, and a spray opening is arranged at one side of the water spray tank 401, the water drops impact on the foam to break the foam.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (4)
1. The utility model provides a sewage treatment aeration tank foam elimination equipment, includes translation mechanism (3) and coupling mechanism (5), coupling mechanism (5) are installed to the inboard of translation mechanism (3) lower extreme, its characterized in that: the horizontal moving mechanism (3) comprises a horizontal moving motor (301), a horizontal moving frame (302), connecting bars (303), pulleys (304), rotating rods (305), guide sleeve plates (306) and a bottom limiting plate (307), wherein two rotating rods (305) are installed at one end of the horizontal moving motor (301), the pulleys (304) are installed on the outer sides of the two ends of each rotating rod (305), the connecting bars (303) are installed on the outer sides of the middle parts of the rotating rods (305), the horizontal moving frame (302) is installed on the upper end face of each connecting bar (303), a foam eliminating motor (10) is installed on the upper end face of each horizontal moving frame (302), five guide sleeve plates (306) are installed on the inner side of each horizontal moving frame (302), a bottom limiting plate (307) is installed on the lower end face of one guide sleeve plate (306), slide rails (2) are installed on the lower end faces of the two pulleys (304), and an aeration tank body (1) is installed on the lower end faces of the slide rails (2);
the connecting mechanism (5) comprises connecting columns (501), a height adjusting plate (502) and end guide plates (503), five connecting columns (501) are mounted on the upper end face of the height adjusting plate (502), and the end guide plates (503) are mounted at two ends of the height adjusting plate (502); a furling connecting plate (6) is installed on one side of the end portion guide plate (503), a furling plate (7) is installed on one end of the furling connecting plate (6), a shifting mechanism (9) is installed on the inner side of the furling connecting plate (6), the shifting mechanism (9) comprises a shifting shaft (901), stirring blades (902) and crushing rods (903), seven crushing rods (903) are installed on the outer side of the shifting shaft (901), the stirring blades (902) are installed on the outer side of the crushing rods (903), and a screw rod (8) is installed on one side of the shifting mechanism (9);
the water pumping mechanism (4) is installed on the upper end face of the translation frame (302), the water pumping mechanism (4) comprises a water spraying box (401), a box body supporting plate (402), a connecting pipe (403) and a water pump (404), the connecting pipe (403) is installed on the upper end face of the water pump (404), the water spraying box (401) is installed at one end of the connecting pipe (403), and the box body supporting plate (402) is installed at one side of the water spraying box (401);
the two ends of the shifting shaft (901) are arranged on the inner side of a furling connecting plate (6), the furling plate (7) is welded and fixed at one end of the furling connecting plate (6), one side of the furling plate (7) is provided with a filtering hole, the inner side of the other end of the furling connecting plate (6) is provided with a threaded hole, and the furling connecting plate (6) is in threaded connection with the screw rod (8);
the belt pulley is arranged on the outer side of one end of the foam removing motor (10), the foam removing motor (10) drives the screw rod (8) to rotate through the belt, the furling connecting plate (6) is connected with the screw rod (8) through threads, the two threads furling the connecting plate (6) are opposite in rotating direction, the two threads are driven by the screw rod (8) to move in opposite directions, the foam is furled through the furling plate (7), and meanwhile the screw rod (8) drives the shifting shaft (901) to rotate through the belt.
2. The sewage treatment aeration tank foam removing device according to claim 1, wherein: one side of translation frame (302) is provided with motor mounting bracket, translation motor (301) are fixed in motor mounting bracket's inboard through screwed connection, one of them the one end of shaft coupling and translation motor (301) is passed through to the one end of rotary rod (305) is connected, connecting strip (303) are connected fixedly through the bearing with rotary rod (305), translation frame (302) are fixed at the up end of connecting strip (303) through screwed connection.
3. The sewage treatment aeration tank foam removing device according to claim 1, wherein: uide bushing board (306) welded fastening is in the inboard of translation frame (302), the inboard of uide bushing board (306) is provided with the guiding hole, the upper end of spliced pole (501) sets up the inboard at the guiding hole, altitude mixture control board (502) welded fastening is at the lower terminal surface of spliced pole (501), both ends at altitude mixture control board (502) are fixed through the screwed connection in tip baffle (503).
4. The sewage treatment aeration tank foam removing device according to claim 1, wherein: the stirring blade (902) is welded and fixed on the outer side of the stirring shaft (901), a positioning hole is formed in the inner side of the stirring blade (902), and the crushing rod (903) is arranged on the inner side of the positioning hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910862804.5A CN110563171B (en) | 2019-09-12 | 2019-09-12 | Equipment is eliminated to sewage treatment aeration tank foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910862804.5A CN110563171B (en) | 2019-09-12 | 2019-09-12 | Equipment is eliminated to sewage treatment aeration tank foam |
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| Publication Number | Publication Date |
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| CN110563171A CN110563171A (en) | 2019-12-13 |
| CN110563171B true CN110563171B (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910862804.5A Active CN110563171B (en) | 2019-09-12 | 2019-09-12 | Equipment is eliminated to sewage treatment aeration tank foam |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113617189B (en) * | 2021-10-13 | 2021-12-21 | 南通汇佰川工程技术有限公司 | Equipment for treating and spraying odor over sewage |
| CN117125832B (en) * | 2023-08-28 | 2024-03-29 | 中国建筑第二工程局有限公司 | River and lake water ecological protection structure and construction method |
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| CN104474744A (en) * | 2014-12-12 | 2015-04-01 | 中煤能源黑龙江煤化工有限公司 | Aeration tank foam eliminating device |
| CN104843882A (en) * | 2015-04-29 | 2015-08-19 | 四川和鼎环保工程有限责任公司 | Rotary defoaming aerator |
| CN105753145A (en) * | 2014-12-14 | 2016-07-13 | 天津沃泰克科技咨询有限公司 | Spraying device of aeration tank |
| CN207619124U (en) * | 2017-11-02 | 2018-07-17 | 浙江华宇纸业有限公司 | Aeration tank defoaming device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104828963A (en) * | 2015-04-29 | 2015-08-12 | 四川和鼎环保工程有限责任公司 | Elevating defoaming aeration tank |
| CN206985822U (en) * | 2017-07-24 | 2018-02-09 | 光大环境科技（中国）有限公司 | A kind of defoaming device for sewage disposal |
| CN208667408U (en) * | 2018-06-22 | 2019-03-29 | 无锡市鸣腾园林工程股份有限公司 | A kind of city domestic sewage purifying processing device |
| CN110204099B (en) * | 2019-06-20 | 2021-12-31 | 浙江弘安纸业股份有限公司 | Papermaking waste water thick liquid water splitter |
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2019
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104474744A (en) * | 2014-12-12 | 2015-04-01 | 中煤能源黑龙江煤化工有限公司 | Aeration tank foam eliminating device |
| CN105753145A (en) * | 2014-12-14 | 2016-07-13 | 天津沃泰克科技咨询有限公司 | Spraying device of aeration tank |
| CN104843882A (en) * | 2015-04-29 | 2015-08-19 | 四川和鼎环保工程有限责任公司 | Rotary defoaming aerator |
| CN207619124U (en) * | 2017-11-02 | 2018-07-17 | 浙江华宇纸业有限公司 | Aeration tank defoaming device |
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Effective date of registration: 20230228 Address after: 066000 gushiyu village, shimenzhai Town, Haigang District, Qinhuangdao City, Hebei Province Applicant after: Qinhuangdao xushankou hazardous waste treatment Co.,Ltd. Address before: No.38, East Gaoming Avenue, Hecheng street, Gaoming District, Foshan City, Guangdong Province 528500 Applicant before: Chen Haiyan |
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