Roots blower and screw blower are commonly used exhaust equipment in the coal washing industry for coal washing. The following is a detailed introduction to them:
1、 Basic principles
Roots blower is a type of volumetric exhaust equipment, mainly composed of rotor, oil seal, fan bearing, end cover, and suction port. The rotor is composed of multiple impellers, each of which has a pair of gears connected to the electric motor through a transmission belt. When the electric motor drives the gear to rotate, the impeller also rotates, sucking gas in from the impeller and ultimately discharging it into the exhaust pipe. Roots blowers can be divided into single-stage and multi-stage types based on their basic principles. A single-stage Roots blower has only one impeller, while a multi-stage Roots blower has multiple impellers. During the use of a multi-stage Roots blower, gas is drawn in from one impeller and then transferred to the second impeller through the first impeller before entering the exhaust pipe.
2、 Performance parameters
The main performance parameters of the Roots blower used for coal washing include speed, pressure (including intake pressure and exhaust pressure, commonly measured in bars, kilopascals, megapascals, and pascals), flow rate (commonly measured in cubic meters per second and cubic meters per minute), shaft power, and exhaust temperature. These parameters are important criteria for selecting wind turbines.
3、 Selection suggestions
When selecting, the following factors need to be considered:
1. Air volume requirement: Select the appropriate fan model and specifications based on the specific air volume requirements of the coal washing process.
2. Pressure requirement: Determine the boosting capacity of the fan based on the gas pressure requirements of the coal washing system.
3. Stability of operation: Choose fans with stable structure and reliable operation to ensure the continuity and stability of the coal washing process.
4. Maintenance convenience: Considering the maintenance convenience of the fan, choose models that are easy to maintain and upkeep to reduce maintenance costs and improve equipment lifespan.
4、 Application advantages
The Roots blower used for coal washing has the following application advantages:
1. Energy saving: Roots blowers have high operating efficiency, which can reduce energy consumption and improve coal washing efficiency.
2. Stable and reliable: Roots blower has a simple structure, stable and reliable operation, and can adapt to various working conditions during coal washing process.
3. Strong adaptability: Roots blower can adapt to different concentrations of coal slurry and coal washing process requirements, and has good adaptability.
4. Easy maintenance: The maintenance of Roots blowers is relatively simple, which can reduce maintenance costs and improve equipment lifespan.
5、 Brand and Price
There are multiple brands of Roots blowers for coal washing in the market, such as the Changsheng brand. The price varies depending on factors such as brand, model, and specifications, ranging from several thousand yuan to tens of thousands of yuan. When choosing, it is recommended to conduct a cost-effectiveness analysis based on actual needs and select products with stable performance and reasonable prices.
6、 Precautions
1. Installation and commissioning: When installing and commissioning Roots blowers, it is necessary to ensure that the coaxiality between the blower and the motor meets the requirements and avoid excessive vibration and noise.
2. Maintenance: Regularly maintain the Roots blower, such as cleaning the impeller, replacing lubricating oil, etc., to ensure the normal operation of the equipment and extend its service life.
3. Inspection: When using Roots blowers, regular inspections should be conducted to ensure that the electrical system and protective devices of the equipment are intact and effective.
In summary, the Roots blower used for coal washing has the advantages of energy saving, stability, reliability, and strong adaptability, and has a wide range of application prospects in the coal washing industry. In the selection and use process, actual needs, performance parameters, brand price and other factors should be fully considered to ensure the normal operation of the equipment and the improvement of coal washing efficiency.
