CN104689664B - Dust wastewater treatment method for green production of premixed concrete - Google Patents
Dust wastewater treatment method for green production of premixed concrete Download PDFInfo
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- CN104689664B CN104689664B CN201510085749.5A CN201510085749A CN104689664B CN 104689664 B CN104689664 B CN 104689664B CN 201510085749 A CN201510085749 A CN 201510085749A CN 104689664 B CN104689664 B CN 104689664B
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- 239000000428 dust Substances 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 238000004065 wastewater treatment Methods 0.000 title abstract description 4
- 239000002351 wastewater Substances 0.000 claims abstract description 73
- 239000007921 spray Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 16
- 238000004062 sedimentation Methods 0.000 claims description 11
- 241000219095 Vitis Species 0.000 claims description 8
- 235000009754 Vitis X bourquina Nutrition 0.000 claims description 8
- 235000012333 Vitis X labruscana Nutrition 0.000 claims description 8
- 235000014787 Vitis vinifera Nutrition 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 235000013312 flour Nutrition 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 5
- 241000252233 Cyprinus carpio Species 0.000 claims description 4
- 238000003287 bathing Methods 0.000 claims description 4
- 230000000994 depressogenic effect Effects 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000009692 water atomization Methods 0.000 claims description 4
- 241000196324 Embryophyta Species 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000010865 sewage Substances 0.000 claims description 2
- 238000006563 Carroll rearrangement reaction Methods 0.000 claims 1
- 239000004576 sand Substances 0.000 claims 1
- 238000004069 wastewater sedimentation Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 6
- 238000010276 construction Methods 0.000 abstract 1
- 238000004880 explosion Methods 0.000 abstract 1
- 241000251468 Actinopterygii Species 0.000 description 3
- GQWNECFJGBQMBO-UHFFFAOYSA-N Molindone hydrochloride Chemical compound Cl.O=C1C=2C(CC)=C(C)NC=2CCC1CN1CCOCC1 GQWNECFJGBQMBO-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention provides a dust wastewater treatment method for green production of premixed concrete. The treatment method comprises the following steps: leakproof dust-removing wastewater recovery of a silo; loading spray-explosion-proof dust-removing wastewater recovery of the silo; dust-removing wastewater recovery of transporting equipment; dust-removing wastewater recovery of a mixing station; parking lot cleaning dust-removing wastewater recovery; and equipment and environment cleaning dust-removing wastewater recovery. Equipment for implementing the dust wastewater treatment method is small in floor area, convenient to repair, high in purifying efficiency and small in power consumption; water resource consumption is reduced; the repeated utilization rate of water is improved. Meanwhile, on one hand, the problem that spray explosion of dust in an open space cannot be controlled is effectively solved, the dust concentration in a closed space is further reduced, and secondary pollution generated when a traditional dust remover filter bag is dedusted and is exchanged is avoided; and on the other hand, simplification of the sealing structure of the mixing station is facilitated, and the construction and maintenance cost of the mixing station is reduced.
Description
Technical field
The present invention relates to treating flour dust technical field, is based especially on a kind of ready-mixed concrete green life of Water spray technology
Produce dust method for treating wastewater.
Background technology
At present in ready-mixed concrete production industry, because raw materials for production mostly are mealiness material, therefore when being produced,
Easily produce substantial amounts of dust pollution, on the one hand pollution environment, on the other hand also to staff it is healthy cause compared with
Big harm, at present, adopts open production more ready-mixed concrete manufacturing enterprise, only weigh in mealiness material barrel silo roof portion and material
Layer setting deduster.Existing some cleaners cannot meet new standard requirement, and someone is removed using active underbalance pulse back flushing type
Dirt device, but it is expensive, and power consumption is big.For some sudden mealiness material " quick-fried spray " accidents, lack effectively emergent so far
Prediction scheme.The mud on concrete mixing and transporting car entrucking layer ground is taken out of to dry by wheel and is changed into dust and causes secondary pollution, is one
Individual ignored severe contamination source.In addition, substantial amounts of water is also needed in production for cleaning equipment facility, separation sandstone etc..This
Plant production waste water and there is strong basicity, past someone just arbitrarily discharges without disposal；Also someone mixes Sewage treatment as concrete
Water is shared, this production waste water contains more mud and other compounds, concrete product quality is adversely affected, it is related new
Standard arranges many restrictions as concrete mixing to waste water with water.It is a kind of new in the urgent need to developing for this present situation
Ready-mixed concrete produces dust method for treating wastewater, to meet actually used needs.
The content of the invention
It is an object of the invention to provide one kind can a kind of wide variety of ready-mixed concrete green production dust waste water treatment
Method.
In order to achieve the above object, the present invention provides following technical scheme：
A kind of ready-mixed concrete green production dust method for treating wastewater, it is characterised in that：Described ready-mixed concrete is green
Color production dust method for treating wastewater comprises the steps：
The first step：Silo anti-leak dust waste water is reclaimed, and above existing mealiness material barrel silo roof portion deduster one is arranged
It is individual to be inverted the bar-shaped spray equipment of golf, will produce waste water with high-pressure hydraulic pump and be pumped to spray equipment ejection pressure dust,
One reception basin is set below the spray equipment at the top of silo, and arranges sewer pipe collection spray water flow and sink to production waste water
Shallow lake pond；
Second step：The explosion-proof spray dust waste water of silo feeding is reclaimed, and in mealiness material silo side, the top at feeding tube is taken
The grape posture spray equipment of lid one arranges spray nozzle on the rack of multiple matrix patterns, is formed down a three-dimensional water curtain, covers
Bulk vehicle afterbody is together with hose-rigid pipe joint；After bulk vehicle pipeline connection in place is appropriate, while Geldart-D particle mealiness material,
Start high-pressure hydraulic pump and be pumped to grape trellis formula spray equipment by waste water is produced, dust will be limited in water curtain if any " quick-fried spray ",
And be depressed due to drenching with rain, waste water Jing gutters flow into sedimentation basin；
3rd step：Conveying equipment dust waste water is reclaimed, by dispensing dicang and the transhipment interface sail of sandstone belt conveyor
Cloth surrounds sealing, inside sets sprayer unit, in rubble blanking, synchronous spraying；
4th step：Facilities of mix storied building dust waste water is reclaimed, closed to weigh layer ceiling and four walls, the closed wall of stirring layer four and ground
Plate, it is unique air inlet that sandstone belt enters the opening of weighing layer, and its top arranges a flat airduct and dries downwards, with compression
Air curtain intercepts stone flour；Weighing layer, the front of stirring layer or Jie Jin positive side, a strong negative-pressure exhausting is respectively being set
Machine, air forms air-flow in the presence of pressure differential, and the dust taken away in two-layer is discharged by air exhauster pipeline, is gone out in air exhauster
Wind pipeline inner upper, arranges multiple spray equipments, allows discharge pipe to become a Water Curtain Cave, the dust in bathing air, totally
Air be discharged to outdoor.
5th step：Parking lot cleaning dust waste water is reclaimed, and digs three entrucking layer ground, and a carp is poured in the hole of lower digging
The parking lot surrounding of fish back of the body formula arranges gutter, washes away mud with production waste water and flows into sedimentation basin；
6th step：Equipment and environment cleaning dust waste water are reclaimed, and by gutter multifeed clarifier is all flowed to.Many times of Jing
More clear waste water after precipitation is recycled as such use again；A special service rack is separately built, trucd mixer rolls entrucking away from
Layer, then to the service rack, be only limitted to rinse cab portion.Production waste water has in use evaporation, in addition sediment
Or the mud cake after press filtration can all take away many moisture, can be supplemented with the water in special carwash pond, special carwash pond then with running water more
Change.
Further, described spray equipment is any one that ultrasonic-wave water-atomization occurs equipment and water under high pressure sprinkling equipment
Or two kinds be used in conjunction with.
Further, described sedimentation basin separately sets filter-pressing device and deposit cleaning plant.
This compared with traditional dust wastewater quality method, drastically increases treating flour dust effect using invention, gives again
Production waste water provides outlet, it is ensured that concrete product quality, and process is simple, cheap, easy to maintenance and reduce secondary dirt
Dye, energy consumption is little, and water utilization rate is high, both environmental protection or has ensured enterprise employee health.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is present invention process flow chart.
Specific embodiment
Below in conjunction with the drawings and the specific embodiments of the present invention, technical scheme is carried out clearly and completely
Description, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based on this
Embodiment in bright, the every other enforcement that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
Embodiment 1：
According to Fig. 1, a kind of ready-mixed concrete green production dust method for treating wastewater comprises the steps：
The first step：Silo anti-leak dust waste water is reclaimed, and above existing mealiness material barrel silo roof portion deduster one is arranged
It is individual to be inverted the bar-shaped square water under high pressure sprinkling equipment of golf, it is pumped to square high pressure water jets by waste water is produced with high-pressure hydraulic pump
Pouring equipment sprays pressure dust, and a reception basin is arranged below the water under high pressure sprinkling equipment at the top of silo, and arranges downcomer
Spray water flow is collected to production effluent settling chamber in road；
Second step：The explosion-proof spray dust waste water of silo feeding is reclaimed, and in mealiness material silo side, the top at feeding tube is taken
The grape posture spray equipment of lid one arranges spray nozzle on the rack of multiple matrix patterns, is formed down a three-dimensional water curtain, covers
Bulk vehicle afterbody is together with hose-rigid pipe joint；After bulk vehicle pipeline connection in place is appropriate, while Geldart-D particle mealiness material,
Start high-pressure hydraulic pump and be pumped to grape trellis formula spray equipment by waste water is produced, dust will be limited in water curtain if any " quick-fried spray ",
And be depressed due to drenching with rain, waste water Jing gutters flow into sedimentation basin；
3rd step：Conveying equipment dust waste water is reclaimed, by dispensing dicang and the transhipment interface sail of sandstone belt conveyor
Cloth surrounds sealing, inside sets sprayer unit, in rubble blanking, synchronous spraying；
4th step：Facilities of mix storied building dust waste water is reclaimed, closed to weigh layer ceiling and four walls, the closed wall of stirring layer four and ground
Plate, it is unique air inlet that sandstone belt enters the opening of weighing layer, and its top arranges a flat airduct and dries downwards, with compression
Air curtain intercepts stone flour；Weighing layer, the front of stirring layer or Jie Jin positive side, a strong negative-pressure exhausting is respectively being set
Machine, air forms air-flow in the presence of pressure differential, and the dust taken away in two-layer is discharged by air exhauster pipeline, is gone out in air exhauster
Wind pipeline inner upper, arranges multiple spray equipments, allows discharge pipe to become a Water Curtain Cave, the dust in bathing air, totally
Air be discharged to outdoor.
5th step：Parking lot cleaning dust waste water is reclaimed, and digs three entrucking layer ground, and a carp is poured in the hole of lower digging
The parking lot surrounding of fish back of the body formula arranges gutter, washes away mud with production waste water and flows into sedimentation basin；
6th step：Equipment and environment cleaning dust waste water are reclaimed, and by gutter multifeed clarifier is all flowed to.Many times of Jing
More clear waste water after precipitation is recycled as such use again；A special service rack is separately built, trucd mixer rolls entrucking away from
Layer, then to the service rack, be only limitted to rinse cab portion.Production waste water has in use evaporation, in addition sediment
Or the mud cake after press filtration can all take away many moisture, can be supplemented with the water in special carwash pond, special carwash pond then with running water more
Change.
Embodiment 2：
According to Fig. 1, a kind of ready-mixed concrete green production dust method for treating wastewater comprises the steps：
The first step：Silo anti-leak dust waste water is reclaimed, and above existing mealiness material barrel silo roof portion deduster one is arranged
There is equipment in the individual bar-shaped square ultrasonic-wave water-atomization of golf of being inverted, square ultrasound is pumped to by waste water is produced with high-pressure hydraulic pump
There is equipment and spray pressure dust in ripple water smoke, a reception basin is arranged below the ultrasonic-wave water-atomization generation equipment at the top of silo,
And sewer pipe collection spray water flow is arranged to production waste water filter-press type sedimentation basin；
Second step：The explosion-proof spray dust waste water of silo feeding is reclaimed, and in mealiness material silo side, the top at feeding tube is taken
The grape posture spray equipment of lid one arranges spray nozzle on the rack of multiple matrix patterns, is formed down a three-dimensional water curtain, covers
Bulk vehicle afterbody is together with hose-rigid pipe joint；After bulk vehicle pipeline connection in place is appropriate, while Geldart-D particle mealiness material,
Start high-pressure hydraulic pump and be pumped to grape trellis formula spray equipment by waste water is produced, dust will be limited in water curtain if any " quick-fried spray ",
And be depressed due to drenching with rain, waste water Jing gutters flow into waste water filter-press type sedimentation basin；
3rd step：Conveying equipment dust waste water is reclaimed, by dispensing dicang and the transhipment interface sail of sandstone belt conveyor
Cloth surrounds sealing, inside sets sprayer unit, in rubble blanking, synchronous spraying；
4th step：Facilities of mix storied building dust waste water is reclaimed, closed to weigh layer ceiling and four walls, the closed wall of stirring layer four and ground
Plate, it is unique air inlet that sandstone belt enters the opening of weighing layer, and its top arranges a flat airduct and dries downwards, with compression
Air curtain intercepts stone flour；Weighing layer, the front of stirring layer or Jie Jin positive side, a strong negative-pressure exhausting is respectively being set
Machine, air forms air-flow in the presence of pressure differential, and the dust taken away in two-layer is discharged by air exhauster pipeline, is gone out in air exhauster
Wind pipeline inner upper, arranges multiple spray equipments, allows discharge pipe to become a Water Curtain Cave, the dust in bathing air, totally
Air be discharged to outdoor.
5th step：Parking lot cleaning dust waste water is reclaimed, and digs three entrucking layer ground, and a carp is poured in the hole of lower digging
The parking lot surrounding of fish back of the body formula arranges gutter, washes away mud with production waste water and flows into waste water filter-press type sedimentation basin；
6th step：Equipment and environment cleaning dust waste water are reclaimed, and by gutter multifeed clarifier is all flowed to.Many times of Jing
More clear waste water after precipitation is recycled as such use again；A special service rack is separately built, trucd mixer rolls entrucking away from
Layer, then to the service rack, be only limitted to rinse cab portion.Production waste water has in use evaporation, in addition sediment
Or the mud cake after press filtration can all take away many moisture, can be supplemented with the water in special carwash pond, special carwash pond then with running water more
Change.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (3)
1. a kind of ready-mixed concrete green production dust method for treating wastewater, it is characterised in that：Described ready-mixed concrete green
Production dust method for treating wastewater comprises the steps：
The first step：Silo anti-leak goes out dirt Sewage treatment, one is arranged above existing mealiness material barrel silo roof portion deduster and is fallen
The bar-shaped spray equipment of golf is put, waste water will be produced with high-pressure hydraulic pump and is pumped to spray equipment ejection pressure dust, in cylinder
The spray equipment lower section in silo roof portion arranges a reception basin, and arranges sewer pipe collection spray water flow to production wastewater sedimentation
Pond；
Second step：The explosion-proof spray dust waste water of silo feeding is reclaimed, and in mealiness material silo side, the top at feeding tube puts up one
Grape posture spray equipment arranges spray nozzle on the rack of multiple matrix patterns, is formed down a three-dimensional water curtain, covers in bulk
Tailstock portion is together with hose-rigid pipe joint；After bulk vehicle pipeline connection in place is appropriate, while Geldart-D particle mealiness material, also start
High-pressure hydraulic pump is pumped to grape trellis formula spray equipment by waste water is produced, and dust will be limited in water curtain if any " quick-fried spray ", and by
It is depressed in drenching with rain, waste water Jing gutters flow into sedimentation basin；
3rd step：Conveying equipment dust waste water is reclaimed, by dispensing dicang and the transhipment interface canvas bag of sandstone belt conveyor
Sealing is enclosed, sprayer unit is inside set, in rubble blanking, synchronous spraying；
4th step：Facilities of mix storied building dust waste water is reclaimed, closed to weigh layer ceiling and four walls, the closed wall of stirring layer four and floor, sand
It is unique air inlet that stone belt enters the opening of weighing layer, and its top arranges a flat airduct and dries downwards, uses compressed air
Curtain intercepts stone flour；Weighing layer, the front of stirring layer or Jie Jin positive side, a strong negative-pressure air exhauster is respectively being set, it is empty
Gas forms air-flow in the presence of pressure differential, and the dust taken away in two-layer is discharged by air exhauster pipeline, in air exhauster discharge pipe
Road inner upper, arranges multiple spray equipments, allows discharge pipe to become a Water Curtain Cave, the dust in bathing air, clean sky
Gas is discharged to outdoor；
5th step：Parking lot cleaning dust waste water is reclaimed, and digs three entrucking layer ground, and a carp back of the body is poured in the hole of lower digging
The parking lot surrounding of formula arranges gutter, washes away mud with production waste water and flows into sedimentation basin；
6th step：Equipment and environment cleaning dust waste water are reclaimed, and by gutter multifeed clarifier is all flowed to；
More clear waste water Jing after many precipitations is recycled as such use again；A special service rack is separately built, is stirred
Car rolls entrucking layer away from, then to the service rack, is only limitted to rinse cab portion；
Production waste water has in use evaporation, and in addition the mud cake after sediment or press filtration can all take away many moisture, can
Supplemented with the water in special carwash pond, special carwash pond is then changed with running water.
2. a kind of ready-mixed concrete green production dust method for treating wastewater according to claim 1, it is characterised in that：Institute
The spray equipment stated is that any one or two kinds that ultrasonic-wave water-atomization occurs equipment and water under high pressure sprinkling equipment are used in conjunction with.
3. a kind of ready-mixed concrete green production dust method for treating wastewater according to claim 1, it is characterised in that：Institute
The sedimentation basin stated separately sets filter-pressing device and deposit cleaning plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510085749.5A CN104689664B (en) | 2015-02-17 | 2015-02-17 | Dust wastewater treatment method for green production of premixed concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510085749.5A CN104689664B (en) | 2015-02-17 | 2015-02-17 | Dust wastewater treatment method for green production of premixed concrete |
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| Publication Number | Publication Date |
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| CN104689664A CN104689664A (en) | 2015-06-10 |
| CN104689664B true CN104689664B (en) | 2017-05-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106113273A (en) * | 2016-07-17 | 2016-11-16 | 临汾市华基新型建材有限公司 | Zero-emission, the concrete manufacturing process of no pollution |
| CN109111180A (en) * | 2018-08-28 | 2019-01-01 | 浙江华坤建设有限公司 | Precast concrete three-protection design method |
| CN111660432A (en) * | 2020-06-03 | 2020-09-15 | 合肥学院 | Waste slurry recycling process for pushing mixing plant |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229198A (en) * | 2011-04-08 | 2011-11-02 | 三一重工股份有限公司 | Spraying and dedusting system and concrete mixing plant with same |
| WO2012172138A1 (en) * | 2011-06-17 | 2012-12-20 | Consejo Superior De Investigaciones Científicas (Csic) | Method for the production of alkali cements from industrial and urban waste glass |
| CN103481376A (en) * | 2013-09-09 | 2014-01-01 | 三一汽车制造有限公司 | Stirring dust collection method and device of stirring station |
-
2015
- 2015-02-17 CN CN201510085749.5A patent/CN104689664B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229198A (en) * | 2011-04-08 | 2011-11-02 | 三一重工股份有限公司 | Spraying and dedusting system and concrete mixing plant with same |
| WO2012172138A1 (en) * | 2011-06-17 | 2012-12-20 | Consejo Superior De Investigaciones Científicas (Csic) | Method for the production of alkali cements from industrial and urban waste glass |
| CN103481376A (en) * | 2013-09-09 | 2014-01-01 | 三一汽车制造有限公司 | Stirring dust collection method and device of stirring station |
Non-Patent Citations (1)
| Title |
|---|
| 预拌混凝土搅拌站绿色生产技术探讨;纪宪坤等;《施工技术》;20141231;第43卷(第24期);第24-27页 * |
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Inventor after: Huang Wenyong Inventor before: Xie Fang |
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Denomination of invention: Dust wastewater treatment method for green production of premixed concrete Effective date of registration: 20190719 Granted publication date: 20170510 Pledgee: Bank of China Limited by Share Ltd. Xiamen branch Pledgor: XIAMEN MEIYI GROUP Co.,Ltd. Registration number: 2019990000749 |
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Date of cancellation: 20220714 Granted publication date: 20170510 Pledgee: Bank of China Limited by Share Ltd. Xiamen branch Pledgor: XIAMEN MEIYI GROUP Co.,Ltd. Registration number: 2019990000749 |
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Denomination of invention: A treatment method of dust and wastewater in green production of ready mixed concrete Effective date of registration: 20220714 Granted publication date: 20170510 Pledgee: Bank of China Limited Xiamen Haicang sub branch Pledgor: XIAMEN MEIYI GROUP Co.,Ltd. Registration number: Y2022990000456 |
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