CN110092201A - A kind of automatic air blowing equipment of solid particle positive pressure - Google Patents
A kind of automatic air blowing equipment of solid particle positive pressure Download PDFInfo
- Publication number
- CN110092201A CN110092201A CN201910422950.6A CN201910422950A CN110092201A CN 110092201 A CN110092201 A CN 110092201A CN 201910422950 A CN201910422950 A CN 201910422950A CN 110092201 A CN110092201 A CN 110092201A
- Authority
- CN
- China
- Prior art keywords
- type
- solid particle
- vibra feeder
- bin
- aggregate bin
- Prior art date
- 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.)
- Pending
Links
- 239000007787 solid Substances 0.000 title claims abstract description 43
- 239000002245 particle Substances 0.000 title claims abstract description 38
- 238000007664 blowing Methods 0.000 title claims abstract description 19
- 238000007599 discharging Methods 0.000 claims description 11
- 230000035945 sensitivity Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 16
- 238000005516 engineering process Methods 0.000 abstract description 11
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000003814 drug Substances 0.000 description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 239000000126 substance Substances 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012377 drug delivery Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000622 irritating effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000011165 process development Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 210000000697 sensory organ Anatomy 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/06—Gas pressure systems operating without fluidisation of the materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The present invention relates to a kind of automatic air blowing equipments of solid particle positive pressure, belong to environmental technology field.Including feed bin, vibra feeder, mass sensor, aggregate bin, electric sealed valve, Cyclone wind motor, connecting line, Y-type three way type and connecting conduit, the vibra feeder is placed in below bin bottom discharge port, the mass sensor is set to feed bin supporting leg bottom, the aggregate bin is placed in below vibra feeder discharge port, solid particle in the feed bin passes through vibra feeder vibrating transportation to aggregate bin, electric sealed valve is equipped with below the aggregate bin, Y-type three way type is connected below aggregate bin, the Cyclone wind motor and Y-type three way type are connected through connecting line, another free end of Y-type three way type connects connecting conduit.By the setting vibra feeder, material is sent to aggregate bin, by vortex fan feeding, electric sealed valve is set, the purpose realizing self-feeding, being continuously conveyed.
Description
Technical field
The invention belongs to environmental technology fields, more particularly to a kind of automatic air blowing equipment of solid particle positive pressure.Mainly answer
For dry solid granular medicine denitration field.
Background technique
With the rapid development of economy, environmental problem is also increasingly serious, the intensification of haze allowed everybody to recognize in recent years
The importance of waste gas pollution control and treatment.Various circles of society also constantly study and inquire into the new technology of waste gas pollution control and treatment, new process, new equipment with
It asks and reaches better regulation effect.Diversification is also presented in industrial gas emission source and complicated component multiplicity, corresponding Treatment process
Development.
Since Industrial Revolution, due to the fast development of modern times industry, the consumption of fossil fuel has been continuously increased, it is burned
A large amount of SO that journey is discharged2、NOXAnd the pollutants such as dust cause a series of ecological environment problems, and cause to the health of the mankind
Directly threaten.On the other hand, with the rapid development of organic synthesis industry and petro chemical industry, into the organic compound of atmosphere
Object is more and more, this substance is often with stench, not only to the irritating effect of the various sense organs of human body, but also many organic compounds
Object has certain toxicity, " three cause " effect is generated, to generate very big harm to human body and environment.For the above pollutant,
The smoke gas treatment technology of existing maturation has certain drawbacks: capital expenditure is big, operating cost is high, energy consumption is big, take up a large area,
Subsequent products processing, which is not thorough, be easy to cause secondary pollution etc..Consider from long term growth angle, researches and develops cheap, purification
High-efficient new technology, new equipment have become the research direction of frontier nature in Air Pollution Control field.
Oxynitrides (NOx), which can not only generate human health, directly to be endangered, but also can be with ingredients some in atmosphere
Reaction forms acid rain and photochemical fog, promotes the formation of superfine particulate matter, is influence ecological environment and global warming main
The factor.In recent years, China's nitrogen oxide emission occupy always high-order, and total emission volumn is 2337.8 ten thousand t within 2012, wherein including
Industrial Boiler including industrial circulating fluid bed boiler discharges 2,710,000 t of nitrogen oxides, accounts for current year industrial nitrogen oxide emission
13.5%。
Existing Flue Gas Denitrification Engineering, it is generally de- using SNCR denitration technology, SCR denitration technology, dry solid granular medicine
Nitre technology etc..Selective non-catalytic reduction (SNCR) is to be sprayed into furnace to carry out with NOx with reducing agents such as NH3, urea
Selective reaction, but since NH3 is hazardous chemical, there are greater risks in use process, have developed dry solid accordingly
Grain medicament denitration technology.The study found that dry solid granular medicine denitration technology requires strictly solid particle added amount of chemical,
When solid particle added amount of chemical is very few, expected denitration effect is not achieved, exhanst gas outlet discharge value is not up to standard；Work as solid particle
When added amount of chemical is excessive, the escaping of ammonia phenomenon can be generated, influences denitration efficiency, the escape of ammonia increases, and NOx reduction rate can also dropped
It is low.The escape of ammonia will cause new environmental pollution.Therefore solid particle medicament to add most important, traditional explosive-feeding processing device more
Number can prevent " inverted ventilation " phenomenon, also be able to achieve for medicine purpose for sealing discharger or rotary feeder, this device；But exists and lack
It falls into: first is that medicament crushing phenomenon is serious, easily blocking follow-up equipment, extreme influence is caused to system operation；Turn second is that easily filling up
Sub- drug delivery slot, the phenomenon that being easy to appear " discharger turn, but do not put in poison "；And discharger " Caton " or " card stops " may be caused now
As.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention provides a kind of automatic air blowing equipment of solid particle positive pressure, leads to
The setting vibra feeder is crossed, material is sent to aggregate bin, by vortex fan feeding, electric sealed valve is set, is realized certainly
Dynamic feeding, the purpose being continuously conveyed.
The technical solution adopted by the invention is as follows:
A kind of automatic air blowing equipment of solid particle positive pressure, the air blowing equipment include feed bin, vibra feeder, mass sensor,
Aggregate bin, electric sealed valve, Cyclone wind motor, connecting line, Y-type three way type and connecting conduit, the vibra feeder are placed in feed bin
Below bottom discharge port, the mass sensor is set to feed bin supporting leg bottom, and the aggregate bin is placed in vibra feeder discharging
Below mouthful, by vibra feeder vibrating transportation to aggregate bin, the aggregate bin lower section is equipped with the solid particle in the feed bin
Electric sealed valve, aggregate bin lower section connect Y-type three way type, and the Cyclone wind motor and Y-type three way type are connected through connecting line, the Y type
Another free end of threeway connects connecting conduit.
The mass sensor is connected with PLC control system, and the PLC control system is connected with vibra feeder, control
The vibration frequency of vibra feeder.
The bin bottom discharge port is equipped with baffle, and there are discharging gap, vibrations between the baffle and vibra feeder
When dispenser does not vibrate, baffle blocks discharge port, and material does not fall, and after vibra feeder vibration, material is given from baffle and vibration
It discharges between glassware.
Further, the electric sealed valve is blade wheel structure, rotatable.It is vertically placed to below aggregate bin discharge port, leaf
Wheel end has with shell inner wall well to be contacted, when Cyclone wind motor conveying solid substance particle, will not upward inverted ventilation, electric sealed valve disc rotation
It is dynamic, upper endfeed, lower end discharging, continuously discharging.
Further, the connecting line is using the connection type for connecing chuck and seal washer fastly.
Beneficial effects of the present invention:
A kind of solid particle positive pressure air blowing equipment of the present invention guarantees that solid particle medicament is conveying using the form of vibration drug delivery
Integrated degree in the process, control vibration frequency realize weight feed.Prevent " inverted ventilation " phenomenon by electric sealed valve, it is electronic close
Envelope valve is internally provided with impeller, and impeller end has with shell inner wall well to be contacted, will not be upward when Cyclone wind motor conveying solid substance particle
Inverted ventilation, electric sealed valve wheel rotation, upper endfeed, lower end discharging, continuously discharging.Present device failure rate is low, realizes
Automatically solid particle denitration medicament is blowed, it is continuous to supply, guarantee that medicament continuously adds, avoids medicament damaged and waste, reduces people
Work operation reduces operating cost.Automatically solid particle is blowed, it is continuous to supply, guarantee the integrality of solid particle, it is convenient to operate,
Without human attendance, cost of labor is reduced, high degree of automation, equipment failure rate is low, stable.
The present invention effectively solves in dry solid granular medicine denitration technology that solid particle medicament crushes, equipment is stuck etc. and asks
Topic, equipment take up space it is small, it is flexible for installation, maintenance facilitate；Cyclone wind motor offer is selected to blow power, conveying noise is small, is lower than
60 decibels, reduce noise pollution.
Detailed description of the invention
Fig. 1 is the automatic air blowing equipment structural schematic diagram of solid particle positive pressure of the present invention.
In figure, 1 is feed bin；2 be vibra feeder；3 be mass sensor；4 be aggregate bin；5 be electric sealed valve；6 are
Cyclone wind motor；7 be connecting line；8 be Y-type three way type；9 be connecting conduit.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples:
A kind of automatic air blowing equipment of solid particle positive pressure of the present invention, including feed bin 1, vibra feeder 2, mass sensor 3, gather materials
Bucket 4, electric sealed valve 5, Cyclone wind motor 6 and relevant connection pipeline, the vibra feeder is placed in the bottom of feed bin 1, described
1 bottom discharge port side of feed bin is equipped with baffle, and there are discharging gap, vibra feeders 2 between the baffle and vibra feeder 2
When not vibrating, baffle blocks discharge port, and material does not fall, and after vibra feeder 2 vibrates, material is from baffle and vibra feeder 2
Between discharge.Solid particle is deposited in material outlet and vibra feeder rear end, and solid particle passes through 2 vibrating transportation of vibra feeder
To aggregate bin 5,1 bottom of feed bin is provided with mass sensor 3, and feed bin 1 is connected with 2 one end of vibra feeder, the quality
Sensor 3 monitors the quality of feed bin 1 and 2 integrated solid particle of vibra feeder, and signal measured by mass sensor is transmitted to
PLC control system, the PLC control system model SIEMENS PLC 200, the vibration of the PLC control system and vibra feeder
Dynamic motor is connected, and PLC control system controls the vibration frequency of the vibra feeder according to the variation of quality in the unit time, into
And to control the amount of the material of vibrating transportation.
The aggregate bin 4, which descends, is arranged electric sealed valve 5, model MFGLQ-40-0.75, sets inside the electric sealed valve 5
It is equipped with the impeller being vertically arranged, impeller end has with shell inner wall well to be contacted, will not be upward when Cyclone wind motor conveying solid substance particle
Inverted ventilation, electric sealed valve wheel rotation, upper endfeed, lower end discharging, continuously discharging.Electric sealed valve can prevent solid particle
Occur inverted ventilation phenomenon when blowing, greatly reduces equipment failure rate.
The Cyclone wind motor 6 is connect by connecting line with 7 aggregate bins 4 and external container, when the Cyclone wind motor is to even
When blowing air in adapter tube road, the solid particle fallen into aggregate bin 4 directly acquires conveying power, is blown to external container,
Realize that material blows automatically.
The connecting line all using the connection type for connecing chuck and seal washer fastly, guarantees equipment disassembly flexibly, more
It changes conveniently.
Embodiment 1
As shown in Figure 1, the present invention includes feed bin 1, vibra feeder 2, mass sensor 3, aggregate bin 4, electric sealed valve 5, rotation
Whirlpool blower 6, connecting line 7, Y-type three way type 8 and connecting conduit 9, the vibra feeder 2 is placed in 1 bottom of feed bin, with bin outlet
One end is connected, and the mass sensor 3 is placed in 1 supporting leg bottom of feed bin, for detecting the mass change of whole system.The material
1 bottom discharge port side of storehouse is equipped with baffle, and there are discharging gap between the baffle and vibra feeder 2, the gap is general
For 30mm, when vibra feeder 2 does not vibrate, baffle blocks discharge port, and material does not fall, vibra feeder 2 vibrate after, material from
It discharges between baffle and vibra feeder 2.Solid particle in the feed bin 1 is by 2 vibrating transportation of vibra feeder to gathering materials
Bucket 4 controls the vibration frequency of vibra feeder 2 by the quality signal that mass sensor 3 monitors, and then to control vibrating transportation
Material amount, the Cyclone wind motor 6 connected by connecting line 7, Y-type three way type 8, connecting line 9 and aggregate bin 4 and external container
It connects, when the Cyclone wind motor 6 blows air into connecting line, it is dynamic that the solid particle to fall into aggregate bin 4 provides conveying
Power blows solid particle to external container, realizes that material blows automatically.The aggregate bin 4 is lower to be arranged electric sealed valve 5, type
There is inverted ventilation phenomenon when can prevent solid particle from blowing, greatly reduce and set in number MFGLQ-40-0.75, the electric sealed valve 5
Standby failure rate.The connecting line all using the connection type for connecing chuck and seal washer fastly, guarantees equipment disassembly flexibly, more
It changes conveniently.
Claims (5)
1. a kind of automatic air blowing equipment of solid particle positive pressure, it is characterised in that: the air blowing equipment include feed bin (1), vibration to
Glassware (2), mass sensor (3), aggregate bin (4), electric sealed valve (5), Cyclone wind motor (6), connecting line (7), Y-type three way type
(8) and connecting conduit (9), the vibra feeder (2) are placed in below feed bin (1) bottom discharge port, the mass sensor (3)
It is set to feed bin (1) supporting leg bottom, the aggregate bin (4) is placed in below vibra feeder (2) discharge port, in the feed bin (1)
Solid particle by vibra feeder (2) vibrating transportation to aggregate bin (4), electric sealed valve is equipped with below the aggregate bin
(5), Y-type three way type (8) being connected below aggregate bin (4), the Cyclone wind motor (6) connect with Y-type three way type (8) through connecting line (7),
Another free end connection connecting conduit (9) of Y-type three way type (8).
2. a kind of automatic air blowing equipment of solid particle positive pressure according to claim 1, it is characterised in that: the mass sensitivity
Device (3) is connected with PLC control system, the vibration frequency of PLC control system control vibra feeder (2).
3. a kind of automatic air blowing equipment of solid particle positive pressure according to claim 1, it is characterised in that: the feed bin (1)
Bottom discharge port is equipped with baffle, and there are discharging gaps between the baffle and vibra feeder (2).
4. a kind of automatic air blowing equipment of solid particle positive pressure according to claim 1, it is characterised in that: the electric sealed
Valve (5) is blade wheel structure, rotatable.
5. a kind of automatic air blowing equipment of solid particle positive pressure according to claim 1, it is characterised in that: the connecting line
Using the connection type for connecing chuck and seal washer fastly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910422950.6A CN110092201A (en) | 2019-05-21 | 2019-05-21 | A kind of automatic air blowing equipment of solid particle positive pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910422950.6A CN110092201A (en) | 2019-05-21 | 2019-05-21 | A kind of automatic air blowing equipment of solid particle positive pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110092201A true CN110092201A (en) | 2019-08-06 |
Family
ID=67448753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910422950.6A Pending CN110092201A (en) | 2019-05-21 | 2019-05-21 | A kind of automatic air blowing equipment of solid particle positive pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110092201A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111013372A (en) * | 2019-12-26 | 2020-04-17 | 龚明瀚 | Fluidization groove for flue gas treatment process |
| CN113371808A (en) * | 2021-07-16 | 2021-09-10 | 南京谱瑞环境科技有限公司 | Heavy metal wastewater treatment equipment |
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| WO2004083723A1 (en) * | 2003-03-20 | 2004-09-30 | Rolf Tews | Method and device for feeding industrial combustion plants with wastes, in particular with secondary fuels |
| JP2006111434A (en) * | 2004-10-18 | 2006-04-27 | Seirei Ind Co Ltd | Feeder and color sorter |
| CN201376788Y (en) * | 2009-03-13 | 2010-01-06 | 刘学忠 | Light raw material conveying device |
| CN104512725A (en) * | 2013-09-30 | 2015-04-15 | 宁夏嘉翔自控技术有限公司 | Boiler dust removal pneumatic transmission system |
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| CN206846772U (en) * | 2017-06-08 | 2018-01-05 | 江苏双阳锅炉压力容器有限公司 | A kind of biomass boiler feeding system |
| CN208499772U (en) * | 2018-08-01 | 2019-02-15 | 三通生物工程（潍坊）有限公司 | Wind-force feeder |
| CN210012335U (en) * | 2019-05-21 | 2020-02-04 | 辽宁远景产学研环保技术有限公司 | Solid particle positive pressure automatic blowing equipment |
-
2019
- 2019-05-21 CN CN201910422950.6A patent/CN110092201A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5735439A (en) * | 1995-10-06 | 1998-04-07 | Carl Schenck Ag | Apparatus for the metered discharge of bulk material from a flexible supply container especially in a dosing system |
| WO2004083723A1 (en) * | 2003-03-20 | 2004-09-30 | Rolf Tews | Method and device for feeding industrial combustion plants with wastes, in particular with secondary fuels |
| JP2006111434A (en) * | 2004-10-18 | 2006-04-27 | Seirei Ind Co Ltd | Feeder and color sorter |
| CN201376788Y (en) * | 2009-03-13 | 2010-01-06 | 刘学忠 | Light raw material conveying device |
| CN104512725A (en) * | 2013-09-30 | 2015-04-15 | 宁夏嘉翔自控技术有限公司 | Boiler dust removal pneumatic transmission system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111013372A (en) * | 2019-12-26 | 2020-04-17 | 龚明瀚 | Fluidization groove for flue gas treatment process |
| CN111013372B (en) * | 2019-12-26 | 2022-05-13 | 广东建绿环保工程有限公司 | Fluidization groove for flue gas treatment process |
| CN113371808A (en) * | 2021-07-16 | 2021-09-10 | 南京谱瑞环境科技有限公司 | Heavy metal wastewater treatment equipment |
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