Introduction of KHN rotating blade sand removal

Transcription

1 Introduction of KHN rotating blade sand removal Cyclone sedimentation tank is mainly used for the pretreatment of sewage treatment plant (station), used for the removal of large inorganic particles in sewage before the primary sedimentation tank, after the grid. The rotating impeller is used to control the velocity and flow pattern of the flow into the sedimentation tank. Under the action of centrifugal force and gravity, the sedimentation of sand is accelerated along the wall of the sedimentation tank. At the same time, under the action of the current, the organic matter drifts away with the current. After the sand sinks into the bottom of the sedimentation tank is lifted by air or by the political part, it is combined with a small amount of sewage. After entering the sand-water separator for separation and discharging, the cleaning water returns to the grid well, so as to achieve the goal of sand removal. KHN water treatment equipment Co., Ltd. 1

2 I. Main structure and working principle The horizontal swirling flow mode is adopted in the sedimentation tank. Sewage flows in tangentially from the tank body and flows out of the tank with a rotation of 270 degrees. The residence time of the water body in the tank is about 30 seconds. Sewage enters the pool tangentially through the inlet at a velocity greater than 1 m/s, which produces a certain swirling flow. Under the action of centrifugal force and gravity, sand particles accelerate settlement along the wall of the pool and slide into the sand sinking bucket. Because the central rotary impeller rotates at a speed of revolutions per minute, KHN water treatment equipment Co., Ltd. 2

3 the swirling action is strengthened, not only the sand particles are pushed into the sand sinking bucket, but also the organic matter adhering to the surface of the sand particles can be effectively separated, and the water flowing up with the center is discharged through the outlet to the pool. The deposited sand particles are supplied with certain pressure gas by blower and sent to the bottom of the pool through sand washing pipeline for forced washing, so that the residual organic matter on the surface of the sand particles can be thoroughly removed, and then the sand particles are transported to the spiral sand separator for sand water separation by sand lifting device. 1. The stripping device is composed of a three-leaf Roots blower, an exhaust solenoid valve, a sand washing solenoid valve, a sand lifting solenoid valve and a pipeline. The three-leaf Roots blower is installed on one side of the sand sinking pool, and an air lifting sand pipe and a sand ladle pipe are arranged beside the sand draining pipe, and a compressed air joint for operation is arranged at the bottom. The main function of the device is to distribute the compressed air injected by a blower to the sand washing pipe and the sand lifting pipe, flush and loosen the sand particles deposited in the sand discharging bucket after long-term shutdown, and press the water/air/sand mixture above the straight sand discharging pipe to make the sand discharging pipe unobstructed in operation. KHN water treatment equipment Co., Ltd. 3

4 2. Vertical blade mixer Pool body: the pool body is concrete structure, the upper part is a cylinder, with a tangential inlet, the inlet rotation is not less than 270 degrees for the outlet, the lower part is 1000mm sand collecting bucket, the middle is a cone transition, the bottom of the sand bucket is 45 degrees cone. (users provided) 2.2. The driving mechanism is a closed multi-stage transmission device composed of a variable speed reducer, a secondary transmission gear pair, a load-bearing rotary pallet, a reducer box, a cover plate and a hollow shaft. The device also has a very intuitive visual oil level display meter. The driven gear in the reducer drives a slewing bearing, which is connected with a hollow vertical shaft and rotates the blade in the form of a cantilever. The deceleration device is suitable for 24h continuous operation, and the service coefficient is not less than 1.2. The output shaft of the reducer is sealed by compound three lip to avoid oil leakage. The reducer is equipped with an automatic oil level adjusting device, so that the gear transmission can achieve good lubrication under any temperature change conditions. The reducer adopts low noise, high efficiency and good sealing products. KHN water treatment equipment Co., Ltd. 4

5 The driving motor is flange-mounted induction motor, suitable for 380V, 3-phase, 50Hz power supply, the motor should be IP55 protection. The speed is less than 1500r/min The spindle is made of high quality stainless steel pipe, one end is connected with the center shaft above the transmission mechanism, and the other end is equipped with a vane agitator vane stirrer: Φ1000mm vane stirrer is equipped with 4 blades tilted 30 degrees with the rotation direction, the inner hole and the lower end of the spindle to cooperate, release the bolt can be adjusted along the axial vane stirrer position. Ⅱ Equipment standards JB JB/ZQ JB/ZQ JB/ZQ JB/ZQ JB/T JB/ZQ JB/ZQ JB/ZQ GB1176 GB1220 GB6414 GB9439 GB GB Water treatment equipment manufacturing technical conditions General technical requirements for cutting parts General specification for weldments General specification for Castings General specification for forgings General specification for nonferrous metal castings Assembly technical conditions General technical conditions for painting General specification for packaging technology Technical specification for casting copper alloy The stainless steel rod Dimensional tolerances of castings Gray iron castings Technical specification for electronic box with electronic devices Electric control box for low voltage apparatus KHN water treatment equipment Co., Ltd. 5

6 GB/T GB GB YJ010 JB/ZQ Protection class of low voltage electrical appliance enclosure Corrosion grade and derusting grade of steel before painting Rustproof packaging Technical conditions and testing methods of shot blasting General technical requirements for product inspection The inspection rules and methods for products before they are put into production. "Product installation manual" and "inspection rules and methods for product installation" applicable to this product. Product type test rules applicable to this product "test method for products" Ⅲ Main technical parameters Stirring speed: V=12-20rpm (adjustable) Organic separation rate: than 70% KHN water treatment equipment Co., Ltd. 6

7 Removal rate of sand in sewage water: 0.1mm is 65%, 0.2mm is 85%, 0.3mm is 95%. Sewage retention time: 30S Motor protection level: IP55 Motor insulation class: F grade. Applicable power supply: 380V, 50HZ, 3 phase Working time: 24 hours/day continuous operation or intermittent operation. Ⅳ Material of equipment Vertical blade mixer Blade: 304 stainless steel /Q235 Driving shaft: 304 stainless steel /Q235 Gear: Box: Alloy steel HT250 Sand suction head: 304 stainless steel /Q235 Sand head: 304 stainless steel /Q235 Bolts and other fasteners: 304 stainless steel /Q235 Local control box case: 304 stainless steel /Q235 Fan and connecting piping: negotiated separately. Ⅴ Anticorrosion of equipment 1. Carbon steel parts derusting up to Sa2.5 grade standard. 2. Coated primer, intermediate paint, topcoat, film thickness of not less KHN water treatment equipment Co., Ltd. 7

8 than 200 m. 3. After processing stainless steel parts, the surface is pickled. 4. Before packing, the machined surface should be treated according to the GB4879 standard. 5. Repair the damaged coatings during transportation and installation according to the coating process strictly, and the quality level of the coatings is not lower than that of the original coatings. Irregular sand grit removal Irregular sand grit removal Ⅵ Equipment features of KHN Rotating blade sand removal 1. The area of Rotating blade sand removal is small. 2. The sand effect of the Rotating blade sand removal is very little affected by the change of water volume. 3. The sand-water separation effect of the Rotating blade sand removal is good, the water content of the separated sand is low, the organic matter content is small, and it is easy to transport. 4. The system of Rotating blade sand removal adopts PLC automatic control sand washing and sand discharging cycle, which is safe and KHN water treatment equipment Co., Ltd. 8

9 reliable. 5. The Rotating blade sand removal is easy to operate, simple to maintain and has long service life. 6. The blower adopts advanced technology, with low noise. 7. Rotating blade sand removal has little influence on the surrounding environment and good sanitary conditions. Ⅶ Project site sewage treatment plant,china Sichuan sewage treatment plant,thailand wastewater treatment plant,japan wastewater treatment plant,africa KHN water treatment equipment Co., Ltd. 9

10 wastewater treatment plant,indonesia sewage treatment plant,china Hebei sewage treatment plant,florida in workshop sewage treatment plant,poland wastewater treatment plant,chile KHN water treatment equipment Co., Ltd. 10

11 Introduction of KHN rotating blade sand removal Sand remover for sand washing yard Custom sand removal (Austria) wastewater treatment plant,china Sand separator integrated machine Thanks KHN water treatment equipment Co., Ltd. www. khnwatertreatment.com KHN water treatment equipment Co., Ltd. 11