CN106774139B - A kind of luminous energy self-powered intelligent ship device for recycling sewage and control method - Google Patents
A kind of luminous energy self-powered intelligent ship device for recycling sewage and control method Download PDFInfo
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- CN106774139B CN106774139B CN201710085991.1A CN201710085991A CN106774139B CN 106774139 B CN106774139 B CN 106774139B CN 201710085991 A CN201710085991 A CN 201710085991A CN 106774139 B CN106774139 B CN 106774139B
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- sewage
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Photovoltaic Devices (AREA)
Abstract
The present invention is to provide a kind of luminous energy self-powered intelligent ship device for recycling sewage and control methods.Solar panel is placed at the top of ship and is connected with controller, controller is connected with two groups of pond groups, two group storage battery groups are connected with inverter, inverter is connected with electric cabinet, and electric cabinet is suspended on the front of vessel sewage recyclable device, electric cabinet is connected with liquidometer, temperature sensor, heater and the apparatus to be controlled in control vessel sewage recyclable device by internal wiring terminal.The present invention in order to solve spot ship sewage-treatment plant corollary system it is automatically controlled during the technical barriers such as not intuitive, operation hardly possible, low efficiency, poor reliability, operating characteristics be low, and also to solve the problems, such as that vessel sewage recyclable device cannot be detached from the power supply system of ship itself and work independently, propose it is a kind of can make ship sewage treatment device realize luminous energy self-powered intelligent operation can remote control photovoltaic generating system and electric-control system coupling apparatus.
Description
Technical field
The present invention relates to a kind of vessel sewage recovery systems.The present invention also relates to be a kind of vessel sewage recycling system
The control method of system.
Background technique
The pollution of marine environment is got worse, and the rubbish whirlpool in " the eighth-largest land ", red tide, noxious material is in marine organism
Interior accumulation is all in the attack for initiating the another wave of a wave to the fragile mankind.Only the Bohai Sea is not up to quality standard for clean oceanic water in China
Area just have 2.4 ten thousand square kilometres, account for about the 1/3 of the Bohai Sea gross area, and there is 35% pollutant to be in marine environmental pollution
From the pollution of ship, Pollution From Ships problem is had attracted the attention of all countries in the world.The beginning of this year International Maritime Organization
Start the newest MEPC.227 (64) executed resolution and higher standard is had also been proposed for vessel sewage discharge；The same year, China
Ministry of Communications issues regulation, and sanitary sewage, which discharges inland navigation craft not up to standard, will be prohibited to drive into " vertical two nets, 18 line of two cross one " water
Domain.
But most of inland navigation craft is simultaneously not equipped with sewage disposal device, even if the marine ship for being furnished with sewage-treatment plant
There is no matched photovoltaic generating system, causes spot ship sewage-treatment plant that cannot be detached from the power supply system of ship itself
It works independently.In addition to this, electric control gear the degree of automation of existing ship sewage treatment system is low, and not having has the world
The high performance index and visualization human-computer interaction interface of standard, so existing in device operational process, not intuitive, operation is difficult, effect
The problems such as rate is low, in reactor operational process must personnel it is on the scene, workload is very big, poor reliability and operating characteristics is low.For
Solution above-mentioned technical barrier researches and develops a kind of photovoltaic generating system suitable for ship sewage treatment device in conjunction with electric-control system
Device is extremely urgent.
Summary of the invention
The purpose of the present invention is to provide it is a kind of be able to achieve luminous energy self-powered intelligent operation, can remote control luminous energy self-powered intelligence
It can vessel sewage recyclable device.The object of the invention is also to provide a kind of luminous energy self-powered intelligent ship device for recycling sewage
Control method.
Luminous energy self-powered intelligent ship device for recycling sewage of the invention includes solar panel, inverter, controller, storage
Battery pack, electric cabinet, PLC, A/D module, liquidometer, temperature sensor, heater, A.C. contactor, connecting terminal, air are opened
Pass, Switching Power Supply, aobvious control touch screen, communication antenna.
The solar panel is placed at the top of ship, is connected with controller.
The controller and battery inverter is unified to be placed, and controller is also wanted in addition to connecting with solar panel
It is connected with battery group.
The battery group shares two groups, places jointly with controller and inverter, except it connect with controller respectively
Outside, also it is connected with inverter.
Inverter, battery group and the controller is placed jointly, is also wanted in addition to not connecting with battery component and ship
Sewage disposal device on oceangoing ship is connected.
The electric cabinet is suspended on the front of vessel sewage recyclable device, with inverter, liquidometer, temperature sensor,
Apparatus to be controlled is connected by the internal wiring terminal of electric cabinet on heater and device.
The PLC is placed in electric cabinet, is connected respectively with A/D module and electromagnetic relay.
The A/D module is placed in electric cabinet, is connected respectively with PLC and input terminal.
It the liquidometer totally two, is respectively placed in the aerobic cabinet and anaerobism cabinet of vessel sewage recyclable device, with electricity
Case is controlled to be connected by analog input connecting terminal.
The temperature sensor is placed in the aerobic cabinet of vessel sewage recyclable device, defeated by analog quantity with electric cabinet
Enter connecting terminal to be connected.
The heater, is placed in the aerobic cabinet of vessel sewage recyclable device, passes through output wiring terminal with electric cabinet
It is connected.
The A.C. contactor is placed in electric cabinet, is connected respectively with electromagnetic relay and output wiring terminal.
The connecting terminal is placed in electric cabinet, outer attached device, interior even electric cabinet modules.
The air switch totally two, respectively 220V air switch and 380V air switch, 380V air switch point
Be not connected with inverter, electromagnetic relay, 220V air switch and A.C. contactor, 220V air switch respectively with PLC and open
Powered-down source is connected.
The Switching Power Supply is 24V DC power supply, respectively with 220V air switch, electromagnetic relay, A/D module and aobvious
Touch screen is controlled to be connected.
The aobvious control touch screen is placed on electric cabinet chamber door, is connected with Switching Power Supply, communication antenna and PLC.
The communication antenna is placed at the top of electric cabinet, is connected with aobvious control touch screen, and be connected with mobile phone by WLAN.
The intake pump is connected with aerobic zone and anaerobic zone, constitutes the water inlet system of reactor to be controlled；Water outlet pump and position
Microfiltration membranes inside aerobic zone, which are connected, constitutes the outlet system of reactor to be controlled；Aeration pump is connected with aerobic zone, constitutes
The aerating system of reactor to be controlled.
The intake pump, water outlet pump, aeration pump are connected with electric cabinet.
The control method of luminous energy self-powered intelligent ship device for recycling sewage of the invention includes:
One, solar panel is put at the top of ship, after receiving sunlight irradiation, solar battery intralamellar part carries out light
The electric energy of electrotransformation, generation enters in controller.
Two, controller selects the group storage battery and solar battery of not enough power supply after the two group storage battery states of detection
Plate, which is connected, to be continued to charge, and a group storage battery of electricity abundance is connected continuous discharge with inverter；As time goes by, with inverter
A connected group storage battery enters under-voltage condition, and the group storage battery being connected with solar panel enters saturation state, warp
Controller and inverter detection, if exchanging two group storage batteries when rechargeable battery set charging complete or discharge battery group not enough power supply
Working condition, and so on.
Three, battery transmits electrical power to inverter, inverter by DC conversion be after alternating current with electrical equipment phase
Even, the continued power to electrical equipment is completed.
Four, controller also prevents accumulator super-charge, overcurrent, temperature excessively high in the whole process；It can also prevent from storing
Electric energy opposite direction, which enters in solar panel, in battery protects solar panel.
Five, electric cabinet plays the automatic running and intelligentized control method to device in the whole process, can monitor water in real time
Position, temperature diagnose fault reason, failure cause are sent to cell phone application by WLAN using communication antenna and is alarmed, is opened simultaneously
Dynamic emergence program protection microfiltration membranes and aeration head, can also periodically backwash as needed, return mud, solve that fouling membrane is serious and people
The complicated problem of work manipulation.
Six, aerobic zone and anaerobic zone are respectively set by two liquid level acquisitions of height by the aobvious control touch screen of electric control gear
Value, high liquid level are set as at 4/5 liquid level of reactor bottom to be controlled, and low liquid level is set as apart from reactor bottom 2/5 to be controlled
At liquid level；And provided with one group of temperature controlling range: 15-30 DEG C；Electric control gear passes through liquid level sensor and temperature sensor not
Liquid level information in disconnected acquisition reactor to be controlled, is transmitted to the A/D module in electric cabinet by voltage signal, finally by PLC
Output phase answers answer signal after processing, and concrete mode is as follows:
When reactor aerobic zone to be controlled liquid level reaches low liquid level, start intake pump, water outlet pump is closed, and sewage is from anaerobic zone
Enter aerobic zone through water inlet system；
When reactor aerobic zone to be controlled liquid level reaches high liquid level, start water outlet pump, intake pump is closed, and sewage is from aerobic zone
It is overboard discharged through outlet system；
When reactor aerobic zone to be controlled and anaerobic zone temperature are lower than 15 DEG C, start heater；
When reactor aerobic zone to be controlled and anaerobic zone temperature are higher than 30 DEG C, heater is closed；
Electric cabinet control aerating system is aerated aerobic zone.
Apparatus of the present invention and method have it is following the utility model has the advantages that
(1) apparatus of the present invention control integrated design using advanced photovoltaic power generation-PLC；Two group storage battery interleaved powers,
Ensure to continue to provide electric energy；A whole set of electric control gear can be made to realize the operation of zero energy consumption, while electric energy on effectively save ship, with purchase with
With without installation electricity generation unit.
(2) apparatus of the present invention do medium by the DC/DC circuit using power electronics to realize to photovoltaic cell output work
The control of rate, final realize provide burning voltage to load.No matter guaranteeing how daily light intensity and temperature change, photovoltaic cell
It can continue working at maximum power point rapidly.Improve the working efficiency of independent photovoltaic generating system.Effectively reduce the sun
Energy plate occupied area, saves big quantity space.
(3) apparatus of the present invention use programmable controller, for storing user program, execute logical operation, sequential control,
Periodically, count with the user oriented instruction such as arithmetical operation, and by the input/output of digital-to-analog formula control each water outlet pump,
The operation of other apparatus to be controlled elements such as macerator pump, aeration pump, circulating pump, heater, digital or analog signal send and receive,
Intelligence adjusts, controls each area's liquid level of reactor, temperature, and entirely autonomous operation guarantees that reactor runs on safety level, best temperature
Degree, peak efficiency are not necessarily to manual control.
(4) apparatus of the present invention optimize human-computer interaction interface.It not only can be real in aobvious control touch screen visualization control reactor
Existing foolproof operation can also remotely be controlled by Wireless Local Area Networks using cell phone application.
(5) apparatus of the present invention can realize fault diagnosis, false alarm, self-regeneration.By a large amount of experience accumulation, embody
In program, according to the feedback data of liquidometer, thermometer etc., using program intelligent diagnostics failure cause and self-control, together
When to cell phone application end send fault warning, synchronous transfer fault message, self-regeneration can also remotely execute repair procedure, realize
Operation is free from risk.
(6) apparatus of the present invention are calculated by experiment Correlation equations, the optimal operational condition of experimental verification microfiltration membranes, intelligence
Backwashing time is adjusted, 2-3 times of micro-filtration membrane lifetime is effectively extended.
Detailed description of the invention
Fig. 1 is present apparatus overall structure diagram.
Fig. 2 is the top view of controlled device involved in the present apparatus.
Fig. 3 is electric cabinet appearance diagram.
Fig. 4 is electric cabinet internal element figure.
Fig. 5 is the microfiltration membranes of controlled reactor.
Specific embodiment
It illustrates with reference to the accompanying drawing for a more detailed description to the present invention.Technical solution of the present invention is not limited to set forth below
Specific embodiment is lifted, further includes any reasonable combination between each specific embodiment.
The present apparatus includes solar panel 1, and controller 2, two group storage battery groups 3, inverter 4, electric control gear includes electricity
Case 5 is controlled, electric cabinet locks 5-1, starts switch 5-2, electronic cabinet door 5-3 emergency stop switch 5-4, thermovent 5-5, handle 5-6, electric cabinet
5-7, communication antenna 5-8 are covered, control touch screen 5-9 is shown.It include aerobic zone 6-1, anaerobic zone 6-2, temperature sensing on reactor 6 to be controlled
Device socket 10, heater 8, aerobic zone liquidometer socket 7, anaerobic zone liquidometer socket 9.Hanging buckle 5-10, positioning bolt 5- are installed
11, PLC5-12, A/D module 5-13, A.C. contactor 5-14, Wiring trough 5-15, connecting terminal 5-16, Switching Power Supply 5-17, electricity
Magnetic relay 5-18,220V air switch 5-20,380V air switch 5-20, guide rail 5-21..
The solar panel 1 is placed in ship deck or cabin cover two sides.
For the solar panels 1 by being connected with cabin interior controller 2,2 output end of controller is separately connected two groups of electric power storages
Pond group 3, two group storage battery groups 3 are connected with inverter 5, and another output of inverter 5 is terminated at electric control gear 5, power for it.It is above-mentioned
Connection is connected using conducting wire.
The electric control gear 5 is installed on 6 front of reactor to be controlled, is powered by the output end of inverter 4.Electric cabinet locks 5-1,
5-2, emergency stop switch 5-4 are started switch, aobvious control touch screen 5-9 is placed on electronic cabinet door 5-3.Thermovent 5-5, handle 5-6, is placed in
The left side of electric control gear 5, communication antenna 5-8 are placed at the top of automatically controlled case lid 5-7.
Two liquidometer passes through aerobic zone liquidometer socket 7 on reactor 6 to be controlled respectively and anaerobic zone liquidometer is inserted
Mouth 9 is inserted into aerobic zones and anaerobic zone.Temperature sensor is inserted into reactor to be controlled by temperature sensor socket 10.
Arrangement is as follows inside the electric control gear: electric control gear is installed on reactor to be controlled entirely through installation hanging buckle 5-10
6 fronts, inner body 5-12~5-22 are fixed on inside electric control gear 5 by positioning bolt 5-11.PLC5-12, A/D module 5-
13 and 220V air switch 5-19,380V air switch 5-20 is mounted side by side on guide rail 5-21, and guide rail 5-21 is fixed on bottom plate
On.8 electromagnetic relay 5-18 are fixed below 380V air switch 5-20, are Switching Power Supply 5- below electromagnetic relay 5-18
17.It is A.C. contactor 5-14 on the right side of electromagnetic relay 5-18 and Switching Power Supply 5-17.Above each section utilizes Wiring trough 5-15
It is connected with connecting terminal 5-16 by conducting wire.
For example following connections of each components of electric control gear: the three-phase that inverter 4 exports is electrically accessed 380V air switch 5-
In 21, the output end of 380V air switch 5-21 accesses 220V air switch 5-19, electromagnetic relay 5-18, A.C. contactor 5-
In 14.In output end access PLC5-12, the Switching Power Supply 5-17 of 220V air switch 5-19.The output end of Switching Power Supply 5-17
It accesses A/D module 5-13, electromagnetic relay 5-18, show in control touch screen 5-9.A/D module is accessed in PCL5-12 by slot.
In five relays access A.C. contactor 5-14 in electromagnetic relay 5-18, wherein in three access connecting terminal 5-16.
A.C. contactor 5-14 output terminal accesses stand-by in connecting terminal 5-16.The other end of connecting terminal 5-16 accesses reaction to be controlled
Each element to be controlled of device 6.
Claims (3)
1. a kind of control method of luminous energy self-powered intelligent ship device for recycling sewage, the luminous energy self-powered intelligent ship sewage recycling
Device includes: that solar panel is placed at the top of ship and is connected with controller, and controller is connected with two groups of pond groups, two groups of electric power storages
Chi Zuyu inverter is connected, and inverter is connected with electric cabinet, and electric cabinet is suspended on the front of vessel sewage recyclable device, electric cabinet
Pass through internal wiring terminal with liquidometer, temperature sensor, heater and the apparatus to be controlled in control vessel sewage recyclable device
It is connected；
The electric cabinet (5) include electric cabinet lock (5-1), start switch (5-2), electronic cabinet door (5-3), emergency stop switch (5-4),
Thermovent (5-5), handle (5-6), automatically controlled case lid (5-7), communication antenna (5-8), aobvious control touch screen (5-9), installation hanging buckle (5-
10), positioning bolt (5-11), PLC (5-12), A/D module (5-13), A.C. contactor (5-14), Wiring trough (5-15), wiring
Terminal (5-16), Switching Power Supply (5-17), electromagnetic relay (5-18), 220V air switch (5-20), 380V air switch (5-
20), guide rail (5-21)；
Electric cabinet is entirely through installation hanging buckle (5-10) suspension, PLC (5-12), A/D module (5-13), 220V air switch (5-
19), 380V air switch (5-20) is mounted side by side on guide rail (5-21), and guide rail (5-21) is fixed on bottom plate, 8 electromagnetism after
Electric appliance (5-18) is installed below two air switches (5-19~5-20), is Switching Power Supply below electromagnetic relay (5-18)
It is on the right side of (5-17), electromagnetic relay (5-18) and Switching Power Supply (5-17) A.C. contactor (5-14)；
The three-phase of inverter output is electrically accessed in 380V air switch (5-21), the output end difference of 380V air switch (5-21)
Access 220V air switch (5-19), electromagnetic relay (5-18), in A.C. contactor (5-14), 220V air switch (5-19)
Output end access PLC (5-12) and Switching Power Supply (5-17) in, the output end of Switching Power Supply (5-17) access A/D module (5-
13), electromagnetic relay (5-18), in aobvious control touch screen (5-9), A/D module is accessed in PCL (5-12) by slot, electromagnetism after
In five relays access A.C. contactor (5-14) in electric appliance (5-18), in three access connecting terminals (5-16), exchange
Contactor (5-14) output terminal accesses stand-by in connecting terminal (5-16), the other end and ship to be controlled of connecting terminal (5-16)
Each element connection to be controlled of device for recycling sewage；
The vessel sewage recyclable device includes aerobic zone (6-1), anaerobic zone (6-2), temperature sensor socket (10), heater
(8), aerobic zone liquidometer socket (7), anaerobic zone liquidometer socket (9), intake pump (11), water outlet pump (12), aeration pump (13),
Intake pump (11) is connected with aerobic zone (6-1) and anaerobic zone (6-2) constitutes water inlet system；Water outlet pump (12) and aerobic zone microfiltration membranes
(6-1-1), which is connected, constitutes the outlet system of reactor to be controlled；Aeration pump (13) is connected with aerobic zone (6-1) constitutes reactor to be controlled
Aerating system, intake pump (11), water outlet pump (12), aeration pump (13) are connected with electric cabinet (5) by cable；
Electric cabinet (5) by communication antenna (5-8) using WLAN by the state real-time transmission of controlled vessel sewage recyclable device extremely
Mobile phone, and controlled vessel sewage recyclable device can be regulated and controled by mobile phone app；It is characterized in that:
Two liquid level collection values of height are respectively set in aerobic zone (6-1) and anaerobic zone (6-2) by aobvious control touch screen (5-9),
High liquid level is set as at 4/5 liquid level of vessel sewage recyclable device to be controlled bottom, and low liquid level is set as dirty apart from ship to be controlled
At 2/5 liquid level of water recovery device bottom；And it is provided with one group 15-30 DEG C of temperature controlling range, pass through liquid level sensor and temperature
Sensor constantly acquires the liquid level information in vessel sewage recyclable device to be controlled, the A/ being transmitted in electric cabinet by voltage signal
D-module, output phase answers answer signal after handling finally by PLC, specifically includes:
When aerobic zone (6-1) liquid level reaches low liquid level, start intake pump, water outlet pump is closed, and sewage is through water inlet from anaerobic zone
System enters aerobic zone；
When aerobic zone (6-1) liquid level reaches high liquid level, start water outlet pump, intake pump is closed, and sewage is from aerobic zone through going out water system
System overboard discharges；
When aerobic zone (6-1) and anaerobic zone (6-2) temperature are lower than 15 DEG C, start heater (8)；
When aerobic zone (6-1) and anaerobic zone (6-2) temperature are higher than 30 DEG C, close heater (8)；
Electric cabinet control aerating system is aerated aerobic zone (6-1).
2. the control method of luminous energy self-powered intelligent ship device for recycling sewage according to claim 1, it is characterized in that: passing through
Aobvious control touch screen (5-9) feeds back controlled state directly by dynamic digital image.
3. the control method of luminous energy self-powered intelligent ship device for recycling sewage according to claim 2, it is characterized in that: the sun
Energy solar panel, controller, two group storage battery groups, inverter work together, and so that controlled device is detached from the original power supply system of ship only
Vertical work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710085991.1A CN106774139B (en) | 2017-02-17 | 2017-02-17 | A kind of luminous energy self-powered intelligent ship device for recycling sewage and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710085991.1A CN106774139B (en) | 2017-02-17 | 2017-02-17 | A kind of luminous energy self-powered intelligent ship device for recycling sewage and control method |
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| CN106774139A CN106774139A (en) | 2017-05-31 |
| CN106774139B true CN106774139B (en) | 2019-06-14 |
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| CN201710085991.1A Active CN106774139B (en) | 2017-02-17 | 2017-02-17 | A kind of luminous energy self-powered intelligent ship device for recycling sewage and control method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862819A (en) * | 2018-06-05 | 2018-11-23 | 衢州科创工业设计服务有限公司 | A kind of sewage-treatment plant for cultivation greenhouse |
| CN109188899A (en) * | 2018-11-16 | 2019-01-11 | 湖北龙源电力科技有限公司 | Accurate aeration control system and fuzzy control method for sewage treatment blurring |
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| CN101792240A (en) * | 2010-04-06 | 2010-08-04 | 浙江云洲科技有限公司 | Recovery processing system for dejection and sewage of train |
| CN203048680U (en) * | 2013-01-30 | 2013-07-10 | 丁树涛 | Unattended remote control distributed sewage treatment control system |
| CN203360047U (en) * | 2013-07-17 | 2013-12-25 | 黄达健 | Solar nano-catalysis water treatment ship |
| CN203530947U (en) * | 2013-10-21 | 2014-04-09 | 浙江爱迪曼水科技有限公司 | Movable river surface cleaning device |
| CN205472980U (en) * | 2015-12-30 | 2016-08-17 | 天津市雷鸣生态科技有限公司 | Aeration equipment is administered in river lake |
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2017
- 2017-02-17 CN CN201710085991.1A patent/CN106774139B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792240A (en) * | 2010-04-06 | 2010-08-04 | 浙江云洲科技有限公司 | Recovery processing system for dejection and sewage of train |
| CN203048680U (en) * | 2013-01-30 | 2013-07-10 | 丁树涛 | Unattended remote control distributed sewage treatment control system |
| CN203360047U (en) * | 2013-07-17 | 2013-12-25 | 黄达健 | Solar nano-catalysis water treatment ship |
| CN203530947U (en) * | 2013-10-21 | 2014-04-09 | 浙江爱迪曼水科技有限公司 | Movable river surface cleaning device |
| CN205472980U (en) * | 2015-12-30 | 2016-08-17 | 天津市雷鸣生态科技有限公司 | Aeration equipment is administered in river lake |
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