CN205973869U - System for with surplus thermal treatment desulfurization waste water of flue gas - Google Patents
System for with surplus thermal treatment desulfurization waste water of flue gas Download PDFInfo
- Publication number
- CN205973869U CN205973869U CN201620971546.6U CN201620971546U CN205973869U CN 205973869 U CN205973869 U CN 205973869U CN 201620971546 U CN201620971546 U CN 201620971546U CN 205973869 U CN205973869 U CN 205973869U
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- CN
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- Prior art keywords
- concentration tower
- waste water
- desulfurization wastewater
- spraying layer
- underflow
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002351 wastewater Substances 0.000 title claims abstract description 79
- 230000003009 desulfurizing Effects 0.000 title claims abstract description 49
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 48
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000003546 flue gas Substances 0.000 title claims abstract description 20
- 238000007669 thermal treatment Methods 0.000 title abstract 2
- 238000005507 spraying Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000003517 fume Substances 0.000 claims description 18
- 239000010440 gypsum Substances 0.000 abstract description 7
- 229910052602 gypsum Inorganic materials 0.000 abstract description 7
- 239000007921 spray Substances 0.000 abstract description 6
- 238000001704 evaporation Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 4
- 239000002918 waste heat Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 8
- 239000000779 smoke Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 239000012065 filter cake Substances 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 206010022114 Injury Diseases 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 235000012970 cakes Nutrition 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000006071 cream Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000005712 crystallization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005591 charge neutralization Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000010413 mother solution Substances 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Abstract
The utility model discloses a system for with surplus thermal treatment desulfurization waste water of flue gas, including concentration tower and thick stock case, being provided with in the concentration tower and spraying the layer, the thick stock case while is with concentration tower inside and spray layer intercommunication, sets up the through -hole that lets in the flue gas on the concentration tower to the through -hole setting is spraying layer top, is provided with the circulating pump in the concentration tower outside, the circulating pump simultaneously with the concentration tower inside with layer intercommunication spray, and circulating pump and concentration tower inside intercommunication department are located and spray below the layer. The desulfurization waste water that this system utilized waste heat of boiler flue gas's heat evaporation to come out from desulfurized gypsum swirler reaches the purpose of waste control by waste and the zero release of desulfurization waste water, and the evaporation process is gentle, and operating flexibility is high, and the exhaust gas volumn that needs is less, need not consume other heats source, and the power consumption is few, takes up an area of for a short time, and easy to carry out has in addition that the investment of removing economizes, the working costs hangs down, need not add advantage such as any chemical.
Description
Technical field
This utility model is related to a kind of system processing desulfurization wastewater and in particular to the process desulfurization of one kind fume afterheat is given up
The system of water.
Background technology
Domestic flue gas desulfurization at present can be divided into wet method, semidry method and dry method three major types, wherein limestone gypsum wet cigarette
Desulfurization technique has desulfuration efficiency height, operational reliability is high, it is wide to be suitable for coal scope, absorbent utilization rate is high, equipment operation
The SO that many advantages, such as rate is high cheap and easy to get with absorbent is most widely used in the world at present, technology is the most ripe2Removing skill
Art, accounts for installing the 90% of FGD unit capacity.
Limestone gypsum wet flue gas desulfurizing technique is in order to ensure normal operation and the desulfurizing byproduct stone of desulphurization system
The quality of cream is it is necessary to discharge a certain amount of desulfurization wastewater.Desulfurization wastewater conventional treatment is typically using neutralization, flocculation, precipitation at present
With filter etc. handling process, though can meet《Thermal power plant's limestone-gypsum wet desulfuration waste water quality Con trolling index》（DL/T
997-2006）Requirement, but be still high chloride ion, high saliferous and the waste water containing micro heavy, if do not carried out depth
Reason, the limitation of its recovery range is very big, if entering extraneous water body, also very high to the extent of injury of environment, but deep
Degree processing cost is high, complex process.
Utility model content
Technical problem to be solved in the utility model be existing desulfurization wastewater after the process of conventional processes still
So it is unsatisfactory for discharge standard, needs through advanced treating again, cause time and cost to increase, the energy of consumption increases, and carries
Process the system of desulfurization wastewater for a kind of fume afterheat, this system utilizes the heat of vaporization of residual heat from boiler fume from desulfurization stone
Cream cyclone desulfurization wastewater out, reaches the treatment of wastes with processes of wastes against one another and the purpose of desulfurization wastewater zero-emission, has except reduced investment, running cost
With low, be not required to add the advantages such as any chemical drugss.
This utility model is achieved through the following technical solutions：
A kind of system processing desulfurization wastewater with fume afterheat, including concentration tower and underflow case, is arranged in described concentration tower
There is spraying layer, underflow case is simultaneously internal with concentration tower and spraying layer connects, and concentration tower offers the through hole being passed through flue gas, and
And through hole is arranged on above spraying layer, it is provided with circulating pump outside concentration tower, circulating pump is simultaneously internal with concentration tower and sprays
Layer connection, and circulating pump and the connectivity part within concentration tower are below spraying layer.Existing desulfurization wastewater is through conventional process work
It is still high chloride ion, high saliferous and the waste water containing micro heavy after the process of skill, if do not carried out advanced treating, its time
The limitation receiving range is very big, if entering extraneous water body, also very high to the extent of injury of environment, but advanced treating becomes
This height, complex process.In some plant produced, it produces the flue gas containing high temperature in a large number, is all direct as waste gas usually
It is discharged in air, not only pollutes environment, also waste energy, this programme is then to be used as reaction tower by designing following current tower,
In tower, flow velocity is high, using residual heat from boiler fume heat of vaporization from desulfurated plaster cyclone desulfurization wastewater out, reach with useless
Control useless and desulfurization wastewater zero-emission purpose, have except reduced investment, operating cost is low, it is excellent to be not required to add any chemical drugss etc.
Gesture.
Be provided with waste water tank outside concentration tower, between waste water tank and concentration tower, be provided with waste water pump, and waste water pump simultaneously with
Waste water tank connects with concentration tower, is provided with waste water box mixer in waste water tank.Waste water tank be as will from Gypsum Fibrosum cyclone come
Desulfurization wastewater import collect so that its can unify and in large quantities enter concentration tower, thus realize concentration tower work continuous
Property and high efficiency.
It is provided with demister, demister is connected with concentration tower and flue simultaneously outside concentration tower；Demister and concentration tower
Connectivity part is located at below spraying layer, and demister and the connectivity part of concentration tower are located at circulating pump and the connectivity part within concentration tower simultaneously
Top.Demister is to be separated for the water smoke producing contact desulfurization wastewater with high-temperature flue gas after, does not contain only in water smoke
Moisture, it also results in staining and seriously of blower fan, heat exchanger and flue also dissolved with sulphuric acid, sulfate, sulfur dioxide etc. simultaneously
The material that corrosion, therefore design demister are passed through flue carries out separating it is ensured that the service life of flue.
It is provided with concentration tower air-introduced machine, concentration tower air-introduced machine one end connects with positioned at the through hole concentrating top of tower outside concentration tower
Logical, the other end is connected with flue.Concentration tower air-introduced machine is that the high-temperature flue gas in flue are rapidly introduced into concentration tower so that flue gas has
Enough speed, thus being capable of when contacting quickly processing, preserves intake and the circulation speed of flue gas with desulfurization wastewater
Rate.
Be provided with pressure filter outside underflow case, between pressure filter and underflow case, be provided with underflow pump, and underflow pump simultaneously with
Pressure filter connects with underflow case, and is provided with underflow box mixer in underflow case.Pressure filter is by the material filter in underflow case
Go out mud cake, deliver to cure system, filtrate returns underflow case.
Spraying layer bottom is provided with several nozzles, and nozzle all connects with inside spraying layer.Nozzle will be passed through spray
The desulfurization wastewater of layer is quick and is equably sprinkled upon in concentration tower, increases the area with smoke contacts, realizes contact fully, processes
Rapider.
This utility model passes through to arrange concentration tower between boiler tail cleaner unit and desulfurizing tower, is sent desulfurization wastewater with pump
To nozzle spray, adjust nozzle flow and desulfurization wastewater is sprayed in concentration tower, directly utilize residual heat from boiler fume to concentration tower
Atomization desulfurization wastewater co-current contact is evaporated concentration, and moisture is pumped into by conveying with fume emission, concentrated solution
Filter pressing segregation apparatuss form the outer row of filter cake solidification.
Wherein concentration tower is set to following current tower, and flue gas enters above concentration tower, useless with what spraying layer in concentration tower flowed out
Water co-current contact, is evaporated heat exchange, arranges demister in concentration tower exit, the drop being carried by flue gas machinery is taken off
Remove.
This utility model compared with prior art, has such advantages as and beneficial effect：
（1）This programme requires incomplete evaporation desulfurization wastewater in whole process, only waste water is constantly concentrated, and steams
The process of sending out is gentle, and operating flexibility is high, and the exhaust gas volumn of needs is less, and it is not necessary to consume other thermals source, power consumption is few, takes up an area little, runs
Low cost；
（2）Compared with traditional desulfurization wastewater treatment technology, desulfurization wastewater forms closed circulation in the system to this technology,
Waste water is not had to discharge, only solidss produce it is achieved that wet desulfurization of flue gas by limestone-gypsum method technology wastewater zero discharge, filter pressing
The filter cake that machine is formed can be transported outward and carry out innoxious landfill disposal, the liquid of exclusion（Mother solution）By circulation pumped back concentration tower continuation
Reason；
（3）This technical pattern is simply it is easy to implement；Concentrate inner wall of tower, pipeline, nozzle etc. and can be selected for anti-corrosion material；By
In there is no heat transfer component, thus avoiding due to the corrosion causing of conducting heat with scale problems it is not necessary to add any chemical drugss.
Brief description
Accompanying drawing described herein is used for providing this utility model embodiment is further understood, and constitutes the one of the application
Part, does not constitute the restriction to this utility model embodiment.In the accompanying drawings：
Fig. 1 is this utility model structural representation.
Labelling and corresponding parts title in accompanying drawing：
1- concentration tower air-introduced machine, 2- concentration tower, 3- spraying layer, 4- demister, 5- underflow case, 6- underflow box mixer, 7-
Circulating pump, 8- underflow pump, 9- pressure filter, 10- waste water tank, 11- waste water box mixer, 12- waste water pump.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, is not intended as to restriction of the present utility model.
Embodiment
As shown in figure 1, a kind of system processing desulfurization wastewater with fume afterheat, including concentration tower 2 and underflow case 5, described
It is provided with spraying layer 3, underflow case 5 is simultaneously internal with concentration tower 2 and spraying layer 3 connects, and underflow case 5 is storage in concentration tower 2
Waste water after concentration, underflow case 5 is located at concentration tower 2 bottom with the connectivity part of concentration tower 2, concentration tower 2 offers and is passed through flue gas
Through hole, flue gas passes through to concentrate top of tower through hole and enters and spraying layer 3, the vaporific desulfurization wastewater of ejection co-current contact in tower,
So through hole is arranged on above spraying layer 3, both realizes co-current contact and processed, also increase time of contact and process time, place simultaneously
Reason is more efficiently and thorough, is provided with circulating pump 7 outside concentration tower 2, and circulating pump 7 and concentration tower 2 junction have two, wherein
One be located at below spraying layer 3 be directly internal with concentration tower 2 connect, another up through after outer wall with concentration tower 2 in
The spraying layer 3 in portion connects, and in concentration tower 2, the waste water positioned at spraying layer 3 lower section enters spraying layer 3 ejection by circulation 7 pumps and realizes
Go downstream contact, makes the continuous circulating and evaporating of waste water, and is provided with waste water tank 10 outside concentration tower 2, waste water tank 10 and dense
It is provided with waste water pump 12 between contracting tower 2, and waste water pump 12 is connected with waste water tank 10 and concentration tower 2 simultaneously, set in concentration tower outlet
Put demister 4, reduce the drop that flue gas machinery carries, demister 4 connect with concentration tower 2 and flue simultaneously, demister 4 and concentration
The connectivity part of tower 2 is located at below spraying layer 3, and demister 4 and the connectivity part of concentration tower 2 are located in circulating pump 7 and concentration tower 2 simultaneously
Above the connectivity part in portion, outside concentration tower 2, be provided with concentration tower air-introduced machine 1, concentration tower air-introduced machine 1 one end with positioned at concentration tower 2
The through hole connection at top, the other end is connected with flue, is provided with waste water box mixer 11 in waste water tank 10, arranges in underflow case 5
There is underflow box mixer 6, be that the concentrated solution preventing partially crystallizable deposits, outside underflow case 5, be provided with pressure filter 9, pressure filter 9 He
It is provided with underflow pump 8 between underflow case 2, and underflow pump 8 is connected with pressure filter 9 and underflow case 5 simultaneously, underflow case 5 interior part is tied
Brilliant concentrated solution is pumped to pressure filter 9 by underflow and is compressed filtration treatment, concentrated solution after pressure filter 9 is suppressed, output
Filter cake deliver to cure system, filtrate returns underflow case 5, and spraying layer 3 bottom is provided with 8 nozzles, and nozzle all with spraying layer 3
Internal connection.
The desulfurization wastewater coming from Gypsum Fibrosum cyclone is imported waste water tank 10, concentration tower 2 is entered by waste water pump 12；Concentration tower
Waste water in 2 passes through circulating pump 7 and waste water is sent into spraying layer 3；The heat smoke being extracted using concentration tower air-introduced machine 1 in flue is entered
In concentration tower 2；Heat smoke direct contact heat transfer in concentration tower 2 with the vaporific desulfurization wastewater being sprayed by spraying layer 3, makes vaporific de-
Sulfur waste water evaporation and concentration, wherein dissolving material form crystallization concentrated solution；Heat smoke after contacting with vaporific desulfurization wastewater is changed into wet
Flue gas, is exported by concentration tower 2 and returns in flue through demister 4；Vaporific desulfurization wastewater after contacting with heat smoke is changed into part
The concentrated solution of crystallization, is stored in the underflow case 5 of concentration tower bottom；Concentrated solution delivers to pressure filter 9 by underflow pump 8；Pressure filter 9
Leach mud cake, deliver to cure system, filtrate returns underflow case 5.
Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step describes in detail, be should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equivalent replaces
Change, improve, should be included within protection domain of the present utility model.
Claims (9)
1. a kind of fume afterheat processes the system of desulfurization wastewater it is characterised in that including concentration tower（2）With underflow case（5）, institute
State concentration tower（2）In be provided with spraying layer（3）, underflow case（5）Simultaneously with concentration tower（2）Inside and spraying layer（3）Connection, dense
Contracting tower（2）On offer the through hole being passed through flue gas, and through hole is arranged on spraying layer（3）Top, in concentration tower（2）Outside setting
There is circulating pump（7）, circulating pump（7）Simultaneously with concentration tower（2）Inside and spraying layer（3）Connection, and circulating pump（7）With concentration tower
（2）Internal connectivity part is located at spraying layer（3）Lower section.
2. a kind of fume afterheat according to claim 1 processes the system of desulfurization wastewater it is characterised in that described concentration
Tower（2）Outside is provided with waste water tank（10）, waste water tank（10）And concentration tower（2）Between be provided with waste water pump（12）, and waste water pump
（12）Simultaneously with waste water tank（10）And concentration tower（2）Connection.
3. a kind of fume afterheat according to claim 1 processes the system of desulfurization wastewater it is characterised in that described concentration
Tower（2）Outside is provided with demister（4）, demister（4）Simultaneously with concentration tower（2）Connect with flue.
4. a kind of fume afterheat according to claim 3 processes the system of desulfurization wastewater it is characterised in that described demisting
Device（4）With concentration tower（2）Connectivity part be located at spraying layer（3）Lower section, demister simultaneously（4）With concentration tower（2）Connectivity part position
In circulating pump（7）With concentration tower（2）Above internal connectivity part.
5. a kind of fume afterheat according to claim 1 processes the system of desulfurization wastewater it is characterised in that described concentration
Tower（2）Outside is provided with concentration tower air-introduced machine（1）, concentration tower air-introduced machine（1）One end with positioned at concentration tower（2）The through hole at top is even
Logical, the other end is connected with flue.
6. a kind of fume afterheat according to claim 2 processes the system of desulfurization wastewater it is characterised in that described waste water
Case（10）In be provided with waste water box mixer（11）.
7. a kind of fume afterheat according to claim 1 processes the system of desulfurization wastewater it is characterised in that described underflow
Case（5）In be provided with underflow box mixer（6）.
8. a kind of fume afterheat according to claim 1 processes the system of desulfurization wastewater it is characterised in that described underflow
Case（5）Outside is provided with pressure filter（9）, pressure filter（9）With underflow case（5）Between be provided with underflow pump（8）, and underflow pump（8）
Simultaneously with pressure filter（9）With underflow case（5）Connection.
9. a kind of system processing desulfurization wastewater with fume afterheat as claimed in any of claims 1 to 8, its feature
It is, described spraying layer（3）Bottom is provided with several nozzles, and nozzle is all and spraying layer（3）Internal connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620971546.6U CN205973869U (en) | 2016-08-30 | 2016-08-30 | System for with surplus thermal treatment desulfurization waste water of flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620971546.6U CN205973869U (en) | 2016-08-30 | 2016-08-30 | System for with surplus thermal treatment desulfurization waste water of flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205973869U true CN205973869U (en) | 2017-02-22 |
Family
ID=58037872
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| CN201620971546.6U Active CN205973869U (en) | 2016-08-30 | 2016-08-30 | System for with surplus thermal treatment desulfurization waste water of flue gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145230A (en) * | 2016-08-30 | 2016-11-23 | 成都锐思环保技术股份有限公司 | A kind of fume afterheat processes the system and method for desulfurization wastewater |
| CN109052530A (en) * | 2018-07-19 | 2018-12-21 | 江苏京源环保股份有限公司 | A kind of integral type drying tower for fume afterheat processing desulfurization wastewater |
| WO2022032866A1 (en) * | 2020-08-14 | 2022-02-17 | 西安西热锅炉环保工程有限公司 | Desulfurization wastewater zero discharge treatment method and system suitable for multiple working conditions |
-
2016
- 2016-08-30 CN CN201620971546.6U patent/CN205973869U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145230A (en) * | 2016-08-30 | 2016-11-23 | 成都锐思环保技术股份有限公司 | A kind of fume afterheat processes the system and method for desulfurization wastewater |
| WO2018040852A1 (en) * | 2016-08-30 | 2018-03-08 | 成都锐思环保技术股份有限公司 | System and method for treating desulfurization wastewater using flue gas waste heat |
| CN109052530A (en) * | 2018-07-19 | 2018-12-21 | 江苏京源环保股份有限公司 | A kind of integral type drying tower for fume afterheat processing desulfurization wastewater |
| WO2022032866A1 (en) * | 2020-08-14 | 2022-02-17 | 西安西热锅炉环保工程有限公司 | Desulfurization wastewater zero discharge treatment method and system suitable for multiple working conditions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: System and method for treating desulfurization wastewater by using flue gas waste heat Effective date of registration: 20190806 Granted publication date: 20170222 Pledgee: China Minsheng Banking Corp Chengdu branch Pledgor: Chengdu Rui Si green technology limited-liability company Registration number: Y2019510000001 |