The running parameters of the rotary drum screen are the key to ensuring its efficient and stable operation. These parameters not only affect the processing efficiency of the equipment, but also directly relate to energy consumption, maintenance frequency, and service life. The following are the main operating parameters and their importance of the rotary drum screen:
1. Handling traffic (Q)
Definition: The amount of liquid passing through a rotary drum screen per unit time, usually expressed in cubic meters per hour (m ³/h).
Importance: Choose the appropriate processing flow based on actual processing needs to ensure that the equipment is not overloaded or has insufficient processing capacity. Handling excessive traffic may lead to a decrease in separation efficiency, while handling insufficient traffic can result in resource waste.
What are the running parameters of rotary drum screen?
2. Mesh aperture (d)
Definition: The gap size between the sieve or grid determines the maximum solid particle size that can pass through the sieve, usually measured in millimeters (mm).
Importance: Different application scenarios have different requirements for separation accuracy. For example, the commonly used aperture in domestic wastewater treatment is 10-20mm, while industrial wastewater treatment may require smaller apertures (such as 1-5mm). Choosing the appropriate aperture can improve separation efficiency and reduce the burden of subsequent processing.
3. Drum speed (n)
Definition: The number of revolutions per minute that a drum rotates, usually expressed in revolutions per minute (rpm).
Importance: The rotational speed directly affects the efficiency of solid-liquid separation and the energy consumption of the equipment. Lower rotational speed can reduce energy consumption and wear, but may lower separation efficiency; Higher rotational speeds are the opposite. Usually, the rotational speed of the rotary drum screen is between 35-70 rpm, and the specific value needs to be adjusted according to the characteristics of the processed material and separation requirements.
4. Tooth rake linear velocity (v)
Definition: The speed of a rake in circular motion, usually expressed in meters per minute (m/min).
Importance: The speed of the rake line affects the slag discharge effect and the cleanliness of the screen mesh. Appropriate line speed can ensure smooth discharge of solid waste while preventing clogging of the screen mesh. Generally, the rake line speed is set at around 2 m/min.
5. Water level difference (Δ h)
Definition: The water level difference between the inlet and outlet, usually measured in meters (m).
Importance: The water level difference reflects the workload of the equipment. A larger water level difference will increase the operating pressure of the equipment, which may affect the separation efficiency and equipment lifespan. The design strength of rotary drum screen can usually withstand water level differences greater than 1.0 meter, but in emergency situations, it should ensure no deformation and normal operating performance.
6. Motor power (P)
Definition: The output power of the motor that drives the rotary drum screen, usually measured in kilowatts (kW).
Importance: The motor power determines the processing capacity and energy consumption of the equipment. The larger the flow rate, the smaller the mesh aperture, and the smaller the installation angle, the greater the required motor power. Reasonable selection of motor power can ensure that the equipment operates in an efficient and energy-saving state.
7. Installation angle (α)
Definition: The inclination angle of the rotary drum screen relative to the horizontal plane is usually between 35 ° and 90 °.
Importance: The installation angle affects the interception effect and self-cleaning ability. A smaller angle is beneficial for improving interception effectiveness, but may increase the risk of blockage; A larger angle is beneficial for self-cleaning, but the interception effect may be reduced. Usually, the installation angle of rotary drum screen is 35 ° to balance interception effect and self-cleaning performance.
8. Cleaning frequency (f)
Definition: The operating frequency of an automatic cleaning system, usually expressed in times/hour.
Importance: The cleaning frequency determines the cleanliness level of the sieve and prevents clogging. Appropriate cleaning frequency can extend the service life of equipment and improve separation efficiency. The cleaning frequency can be adjusted according to water quality and solid content, usually set to several times to tens of times per hour.
9. Moisture content of slag (w)
Definition: The moisture content in the separated solid waste, usually expressed as a percentage (%).
Importance: A lower moisture content in the slag helps reduce the cost and difficulty of subsequent processing. Some rotary drum screens are equipped with press dewatering devices, which can reduce the moisture content of the slag to about 65% or even lower.
10. Control system settings
Definition: including control parameters such as start/stop conditions, running time, number of reversals, and fault protection.
Importance: Advanced control systems can achieve automated operation, improve equipment efficiency and reliability. For example, automatic start and stop can be achieved through water level sensors, time relays, etc., and overload, locked rotor, reverse and other protection functions can also be set to ensure the safe operation of the equipment.
11. Environmental temperature (T)
Definition: The ambient temperature during device operation, usually measured in degrees Celsius (℃).
Importance: Extreme environmental temperatures may affect the mechanical performance of equipment and the stability of electrical components. Ensure that the equipment operates within an appropriate temperature range to avoid malfunctions caused by high or low temperatures.
12. pH value
Definition: The acidity or alkalinity of a liquid, usually expressed as pH.
Importance: Certain highly corrosive liquids may cause damage to equipment materials, especially to metal components. Choosing corrosion-resistant materials (such as stainless steel) can extend the service life of equipment.
13. Solid concentration (C)
Definition: The concentration of suspended solids in a liquid, usually expressed in milligrams per liter (mg/L) or grams per liter (g/L).
Importance: The higher the solid concentration, the greater the processing load of the equipment, and it may be necessary to adjust operating parameters (such as speed, cleaning frequency, etc.) to ensure separation efficiency and stable operation of the equipment.
14. Energy consumption (E)
Definition: The amount of electrical energy consumed by a device during operation, typically expressed in kilowatt hours (kWh).
Importance: Reasonable energy management can reduce operating costs and improve the economic efficiency of equipment. By optimizing operating parameters such as speed, motor power, etc., energy consumption can be reduced while ensuring processing efficiency.
15. Maintenance cycle (t)
Definition: The time interval for regular maintenance of equipment, usually expressed in days, months, or years.
Importance: Regular maintenance can timely detect and solve potential problems, extending the service life of equipment. The maintenance content includes lubrication, cleaning, and inspection of vulnerable parts.
summary
The operating parameters of the rotary drum screen cover multiple aspects, including processing flow rate, screen aperture, motor power, installation angle, etc. Each parameter has a significant impact on the performance and efficiency of the equipment. Reasonably setting and adjusting these parameters can ensure that the equipment operates in an efficient, stable, and energy-saving state. If you have more specific needs or would like to know the operating parameters of a specific model, please provide more detailed information and I will do my best to assist you.
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