1.Product Overview.
The feed pump of DDG filter press is a special pump designed for filter press according to the comprehensive conditions of coal preparation and cooperation with well-known filter press manufacturers in China. These slurry pumps rely on double impellers to meet the pressure and capacity required by the filter press. It is widely used in metallurgy, mining, coal preparation and other industries. This series of products is a mature product on the market, with the characteristics of reasonable structure, reliable work and long service life. The DDG double impeller filter press feed pump adopts a unique double impeller design. Based on its hydrodynamic principle, the continuous feeding and indirect operation of the filter press are guaranteed, making it more stable than other centrifugal pumps.
2.Technical features:
1.Unique sealing device.
DDG double impeller filter press feed pump adopts three forms, such as external circulation, pressureless water supply mechanical seal and waterless mechanical seal, according to its different working conditions, its design principle is different, comprehensively considering that the filter press needs a pressure of about 6 kg, its pressureless water supply mechanical seal, according to the water in its water tank, adopts self-circulation, saves water, and relies on mechanical seal components to reduce the pump strength for the pressure of the pump shaft seal, its service life is greatly improved, and the shaft seal is guaranteed to have no leakage.
2.Structural design of two-stage impeller.
The feed pump of DDG double impeller filter press adopts the form of double column impeller. Relying on the principle of consistent flow rate and superimposed head of double impellers, the problem of small pressure of single pump and single impeller is completely solved. At the end of the feeding phase, the pump will not feed due to the constraints of the working conditions. Insufficient pressure, severe vibration, excessive noise. However, during normal operation, a single pump has defects such as insufficient pressure and processing capacity, narrow impeller flow channel, and poor slurry performance. The design of the feed pump of the double impeller filter press completely solves the shortcomings of the single pump, and has the characteristics of small flow and high pressure for the slurry pump due to the large flow caused by the high resistance when the filter press feeds. Changes in pressure. Therefore, in terms of design, DDG slurry pump is a feed pump specially designed for filter presses.
3.Long service life.
Since a single pump requires a higher head, from the study of fluid mechanics, when the head of a single pump is high, the wear on the pump will increase, and due to the instability of the single pump in the feeding process, the wear of a single pump will occur. Fast speed, short service life, etc. The design principle of the double impeller filter press feed pump is to obtain a higher outlet pressure at a lower impeller outlet linear velocity, thereby overcoming the shortcomings of a single impeller, that is, increasing the impeller linear velocity for pressurization, thereby reducing the shortcomings of the impeller and volute wear aggravation, and effectively improving the service life of the slurry pump overflow parts (impeller, volute, guard plate). The feed pump of the DDG double impeller filter press is also a highly wear-resistant material for the integrated slurry pump. According to the working conditions, the impeller, volute, rear guard plate and rear guard plate are made of high chromium alloy materials such as A05, A07 and KMTBCR27.
4.Guaranteed pressure methods.
The unique bearing box design enables users to continue to maintain the high pressure of the slurry pump by adjusting the gap between the impeller and the pump wall when the pressure drops due to normal wear and tear after long-term use, while ensuring the working condition. At the same time, the replacement cycle of wearing parts is extended.