Rotary decanter is a top-down variant of drainage treatment works to exclude the supernatant of the sewage treatment of special machinery and equipment, in the drainage stage can be processed on the water has been decanted from the surface of the surface of the clear water is the key equipment of the biological treatment process.
The rotary decanter has the adjustability to the change of water volume, good hydraulic and mechanical properties, and can be automatically raised and lowered with the change of water level.
The equipment has passed the provincial appraisal, can be widely used in urban sewage and paper, beer, tannery, pharmaceutical and other industrial sewage treatment.
Second, equipment name: ZBS-1200 rotary decanter
Third, the main technical parameters:
Equipment No.: 2103-01-04
Decanting water: 1200m3/h
Decanting depth: 1-3m adjustable
Weir width of the weir: 12000mm
Overflow flow rate: 30%, 30%, 30% and 40%.
Over-water flow rate: 30L/s.m
Motor power: 1.5KW
Motor protection/insulation level: IP55/F class
Power supply: 380V 3-phase 50HZ
Quantity: 4 sets
Four, the scope of supply:
1.Provide 4 sets of fully assembled ZBS-1200 Type rotary decanter, each set of decanter including: electric actuator and frequency converter, limit switch, skimmer float device, decanting weir tank, rotary drain, inlet pipe, vent pipe, etc.).
2. Provide 4 sets (one control one) electrical control box (with PLC interface).
3. Provide complete structural installation drawings.
Equipment materials:
Lifting screw: 2Cr13
Machine base: HT200 cast iron
Outflow weir: stainless steel 304
Skimming float: stainless steel 304
Drainage branch pipe and main pipe: stainless steel 304
Sixth, corrosion-resistant parts of the equipment: stainless steel parts first cleaned, and then pickled passivation treatment. Then pickling passivation treatment can be.
Seven, working principle:
1, decanter is designed to become a certain decanting rate discharge supernatant, to avoid disturbing the settling of the sludge layer, to prevent the decanter out of the sludge, decanting rate is adjustable to ensure that the flow rate of each cycle is constant.
2, in each cycle from the highest operating water level of the reaction tank to start decanting, to the lowest operating water level to complete a cycle of decanting cycle, the decanter is driven by the drive mechanism, the decanter to normal operating speed down to the set low water level, the decanter to return to the original position in order to quickly.
3, the decanter's rotary union and seals to prevent liquid leakage, rotary union consists of two tightly assembled sealing device, the discharge pipeline system through the wall of the reaction tank, to ensure that the penetration does not leak.
4, rotary decanter controlled by the process program, the electric actuator according to a certain speed ratio to make the decanting device and decanting weir groove to produce rotary, reaction pool supernatant from the decanting weir groove through the rotary drain out of the pool, rotary decanter weir height continues to fall, decanting weir groove is also synchronized with the fall, the formation of a continuous discharge to the depth of the design water level.
Eight, design features:
1. decanter operation is controlled by the process controller, when the decanting stage begins, the use of the drive device to drive, so that the decanter slowly down, the supernatant after precipitation by the decanting weir mouth decanting into the conduit, and through the collector pipe to collect and discharge the reaction pool. Due to the slow and uniform drive of the driving device, the disturbance of the treated water in the pool by the movement of the decanter and the draining action is greatly reduced. The cylinder on the decanter always floats on the surface of the water thus ensuring that all floating objects are blocked from entering the decanter, greatly reducing the SS concentration of the effluent and ensuring the quality of the effluent.
2. The rotary decanter adopts the form of electric actuator to drive the decanting device, which consists of the decanting device (decanting weir, guide pipe, collector pipe), rotary sealing bearing, driving device and other components.
3. The rotary decanter drives the weir to rise and fall with the forward and reverse operation of the drive motor to complete the decanting action, with protection class IP55 and insulation class F. The rotary sealing bearing is a kind of rotary decanter, which can be used in the form of decanting device.
4. The drive motor adopts frequency conversion speed control, the decanting weir tank descends and decanting according to the set speed downward, after decanting to the lowest point, it will quickly lift up and return.
5. The driving mechanism is equipped with stroke limit, which can accurately position the decanting stroke.
6. Decanting weir is the key part of the whole decanter for decanting, when the decanter is in the initial position, the weir is 200mm higher than the highest water level, in order to prevent the slag from flowing into the decanting weir, slag baffle plate is provided on both sides of the decanting weir, and there is a skimming float on the front side of the decanter, and the decanter as a whole has enough strength and rigidity.
7. One end of the inlet pipe is connected with the decanting weir, and the other end is connected with the rotary drain; on the one hand, the supernatant decanted into the decanting weir is introduced into the rotary drain, and on the other hand, the decanting weir is connected with the rotary drain as a whole, so that the decanting weir rotates around the center of the rotary drain.
8. There is a set of lifting lugs between the two support pipes in the middle of the two decanting weir tanks, which are connected to the lifting nut in the transmission mechanism with a push rod to become the lifting point of the decanting weir tank for ascending and descending, and the position of the point and the length of the push rod are designed to be determined through strict calculations.
9. The rotary drain is equipped with a support shaft head to lead the decanted supernatant out of the pool.
10. Rotary sealing bearing:
Rotary sealing bearing can effectively seal the rotary connection between the collector pipe and the outlet pipe, and can effectively play the role of bearing to withstand the radial force and axial force transmitted by the decanter through the collector pipe. The rotary seal bearing adopts casing type seal bearing, the support part of the material selected for PTFE, with light weight, small friction coefficient, abrasion resistance, fatigue resistance, high strength, but also has a self-lubricating and sound-absorbing, vibration-damping performance; and sealing part of the design of a non-standard double-lip skeleton seals. This structure of the rotary seal bearing has high concentricity, long life, easy maintenance.
Nine, operation control:
1. Each rotary decanter supporting a (a control one) of the local electrical control box, the control box is placed in the rotary decanter near the location.
2. Each electrical control box with manual control, automatic control of two control modes:
Manual control: by the buttons on the control panel to control the operation of a single rotary decanter.
Automatic control: the operation of the rotary decanter is controlled by remote PLC.
3. Each electrical control box power supply into the three-phase five-wire system, the rated voltage of AC380V, the control voltage of AC220V.
4. Each electrical control box box is stainless steel, double-door structure, the protection level of IP55, F-class insulation.
5. Each electrical control box has a variety of conventional protection functions: short-circuit protection, phase failure protection, overload protection.
6. Each electrical control box panel with start-stop button, emergency stop button, start-stop fault indicator and manual/automatic switch.
7. Reliable quality and beautiful appearance are the criteria for selecting electrical components, we mainly use imported or wholly-owned production of electrical parts, the main manufacturers are ABB, Schneider, Siemens, Omron, Fuji and so on.
Xi, equipment testing:
a) We in the equipment before leaving the factory, the operation of the equipment noise, operational reliability and other performance testing, should be in line with the technical requirements of the equipment.
b)After the equipment is installed at the site, we are responsible for the action test to prove that the rotary decanter meets the technical requirements of the equipment, and the buyer must send personnel present.
c)We are responsible for submitting to the buyer
For more information about engineering/service/procurement bid writing and production, to improve the winning rate, you can click the bottom of the official website customer service free consultation:/#/?source=bdzd