ã€ALUMINIUM NETWORK】Aluminum industrial aluminum will generate a lot of waste water during surface treatment, and certain harmful substances in the waste water will be discharged. If it is not treated, it will have a certain impact on the environment, then the industrial aluminum profile What are the wastewater treatment technologies for wastewater treatment?
1. Sources and types of aluminum surface treatment wastewater
The aluminum surface treatment wastewater includes pre-treatment deoiling neutralization acid water washing water, alkaline corrosion alkaline water washing water, acidic water washing acid etching water, and acidified water washing water after oxidation. The colored water contains Ni2+, Sn2+, Acidic water washing, electrophoresis paint ion exchange equipment waste acid, waste alkali and a small amount of electrophoretic paint wastewater. The wastewater is acidic after mixing and contains cations such as Al3+, Ni2+, Sn2+, Sn4+, Na+, Cr3+, and anions such as SO42-, F-, NO3-, Cl-, AlO2-, Ac-, surfactants and acrylic acid. Resins and other organic substances. The waste liquid contains waste sulfuric acid produced by degreasing and neutralization, waste sulfuric acid, waste sulfuric acid produced by oxidation, waste liquid produced by coloration, waste acrylic acid solution produced by electrophoretic paint, and waste liquid containing Ni2+, F-, etc. generated by sealing.
2. Measures to reduce the discharge of waste water and waste liquid
The methods for reducing waste water and waste liquids include reasonable control of water control time and control of the loading angle to reduce the amount of bath liquid carried out, and try to adopt secondary three-stage countercurrent rinsing to reduce water consumption. After the etching and degreasing, the washed water is used for washing after alkali etching, and the washed water after oxidation is used for acid etching and washing after degreasing. In addition, in order to reduce or avoid the discharge of waste water and waste bath, various recovery devices should be designed and used in the production line, such as acid recovery, alkali recovery, anodization, aluminum RO, coloring RO recovery, electrophoretic coating RO Recovery devices that use these recovery devices can reduce the amount of waste water and waste liquid emissions to a large extent, while also greatly reducing the cost of production.
3, the principle and method of aluminum surface treatment wastewater treatment
The waste water produced by aluminum surface treatment is mainly acid-alkali waste water and contains a small amount of harmful anions and cations such as Ni2+, Sn2+, F-, and the treatment method is acid-base neutralization. The waste water is generally acidic and must be neutralized with alkali. The PH value should be adjusted to 7 to 8.5. At the same time, in the neutralization process, cations such as Al3+, Ni2+, Sn2+, and Cr3+ form hydroxide precipitates. The neutralized and precipitated wastewater is pumped into the flocculation tank. At the same time, the dissolved polyamide flocculant is injected into the flocculation tank with a quantitative pump. After the flocculation, the wastewater enters the sedimentation tank. The sedimentation method includes inclined plate precipitation method and air flotation. Method, centrifugal precipitation, etc., I believe that the centrifugal precipitation method is relatively stable, after precipitation, the supernatant from the overflow overflow into the discharge tank or re-treatment reservoir.
After the above-mentioned treatment of wastewater can be discharged, if you want to carry out wastewater reuse, this time the wastewater can be filtered into the RO device after treatment to remove excess anion and cations, organic matter, PH value may be low at this time , can be adjusted after the anion and cation exchange equipment to achieve reuse standards. The sludge produced by the sedimentation is periodically discharged into the sludge pool and processed into industrial waste residue after being processed by a plate-type cake pressing machine or a belt dehydrator and sent to the industrial waste residue treatment plant.
About high speed Door Accessories:
1.Driving system: High Speed Door Servo System motor and control, motor SNMA / SEJ +reducer+flang+encoder+control box
2.Other accessories: Middle aluminium bar, bottom aluminium bar, aluminium vertical track, stainless steel vertical track, brushes,round nylon strip, PVC roll, rolling steel tube complete, drum be;;s for rolling tube, side end covers, stainless steel cover, steel tubes, air bag sensor system, safety light beam, Microwave sensor 24 Gigahertz,PVC welding machine, smoke and fire sensors, PVC transparent window, magnetic loop, photocell, remote control, manual push button, sound warning alarm Led lamp traffic light
For some main accessories, here is detain introduction:
1).24G radar sensor:
Brand: Hofic
Technology: Microwave processor
Maintain time: 0.5s
Protection: IP54
Transmitting frequency: 24.125GHz
Maximum installation height: <5meter
Transmitting power density: <5mw/cm2
Power consumption: <1W(VA)
Installation angle: 0-90°(lengthways) -30-30°(crosswise)
Supply voltage: AC&DC 12V-30V
2).Photocell:
Approval CE & ISO9001
Power supply AC/DC 12-30V
Static current 25A
Action current 40mA
Mounting distance Max 10m
NO or NC contact Done by NO./NC. contact selection
Working environment temperature -42℃ to +45℃
Working environment humidity 10 to 90%RH
Appearance dimensions( controller) 123*50*32mm(L*W*H)
Appearance dimensions(Magic eye head) 19*13mm(L*D)
3). Remote control
Operating Voltage: AC220V/50HZ+-20%
Transmit power:≤100mW;Super regenerative module, strong anti-interference
Operating temperature:-30℃-+70℃
Working frequency: 433MHZ;transmitter 1527, millions of encoding chip
Accept sensitivity:≤110dB
Manipulation method: electric remote control
Configure the quantity: Wireless number; factory configuration transmitter two. Can be equipped with PT2272 digital decoder chip
Configure the function: Up, down, stop, anti-lock full-featured reproduction
4). Magnetic loop
Voltage: 12V AC/DC +-10% 24V 115V AC+-10% 230V
Power: <2VA
Continued electrical output: 7A / 250V AC
Frequency range: 20 to 200K Hz
Response time: infinity (factory setting) or adjust maintain time
Sensitivity: 0.01% to 0.1% divided into 3 levels
Protection level: IP30
Electromagnetic compatibility (EMC) Complies with EM50081-1 and EN50082-2
Detection loop inductance: the limit of 40uH to 100uH ideal value 80uH to 300uH
Operating temperature: -25 ℃ to 70 ℃
Storage temperature: -40 ℃ to 85 ℃
Relative humidity: <90% non-condensing
Temperature compensation: automatic compensation up to 50 ℃ / h
Connection type: 11 pin DIN rail socket
Dimensions: 41 * 78 * 85 mm (width * height * length)
Weight: 250 grams
5). manual push button
This exit switch button is made of ABS and has built-in indicator light make it looks more elegant and fashionbale. It can be widely used in public entrance gates, public door, home, office, hotel, etc.
Door Exit Button Push To Exit Switch Door Opener For Access Control Security
Main Feature
Fashionable appearance
Made of ABS Plastic
Easy to install and operate
Used for access control
Specification
Mechanical Life: 500,000 test
Material: Plastic
6). Limit switch encoder
Voltage: DC5V-24V
Output voltage: high voltage≥85%Vcc, low voltage≤0.5V
Maximum mechanical speed:6000rpm
Anti-vibration: 50m/s,10-200HZ,XYZeach way 2 times.
Current consumption:≤30mA
Response frequency: 0-100KHZ
Protection: waterproof,oil proof,dust prevention, IP54
The output code system: binary code
Operating life: MTBF≥30000(+25℃,2000rpm)
Rotational inertia:4.0x10-8kgm²
Maximum load:radial direction20N
Axial direction:10N
Weight: about 0.4kg
High Speed Door Accessories,High Speed Door,Electronic High Speed Door Accessories
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.spiralfastdoor.com