With the increasing scarcity of water resources, the use of reclaimed water has become an important way to solve the water shortage. As one of the key equipment for reclaimed water treatment, the maintenance and cleaning of the filter are of great significance to ensure the effluent quality and treatment effect. This article will introduce in detail how to maintain and clean filters for reclaimed water treatment.
1. Introduction to filters for reclaimed water treatment
A filter for reclaimed water treatment is a device that removes impurities such as suspended solids, colloids, and bacteria from water by physical methods. Its working principle is to use the filter material to intercept and adsorb to remove impurities in the water to achieve the purpose of purifying water quality. Common types of filters include: activated carbon filters, sand filters, fiber filters, etc.
Second, the maintenance method of the filter
1.Regular check-ups:Regularly check the operation of the filter, including checking whether the fasteners of the equipment are loose, whether the pipes are leaking, and whether the backwash system is normal.
2.Replace the filter media in timeFor activated carbon filters, sand filters, etc., the filter media needs to be replaced regularly. When replacing the filter material, it should be carried out in accordance with the operating procedures provided by the manufacturer to avoid affecting the filtration effect.
3.Keep the device clean:Clean the equipment regularly to prevent the accumulation of dirt from affecting the filtration effect. At the same time, special attention should be paid to cleaning the dead zone of the equipment to prevent the growth of bacteria.
4.Logging of running data:The operating data of the filter is recorded, including the backwash time, backwash flow, etc. This data can help operators understand the health of equipment and identify and resolve issues in a timely manner.
3. Cleaning method of filter
1.Backwash method:The backwash water flow is used to flush out the impurities attached to the filter media and at the same time discharge the impurities out of the filter. When backwashing, the intensity and time of backwashing should be controlled to avoid loss of filter material or damage to the equipment.
2.Chemical cleaning method: The chemical agent is used to react with the impurities on the filter media to dissolve or convert the impurities into an easy-to-remove form, and then discharge them through backwashing. When chemical cleaning, the appropriate agent should be selected, and the dosage and concentration of the agent should be controlled to avoid damage to the filter material.
3.Air washing:Compressed air is used to loosen the impurities on the filter media and blow out of the filter. The air washing method is suitable for some equipment that is not suitable for backwashing with water. When air washing, the air pressure and volume should be controlled to avoid damage to the filter material or vibration of the equipment.
4.Ultrasonic cleaning method:The vibration of ultrasonic waves is used to shake off or loosen the impurities on the filter material, and then discharge them through backwashing. The ultrasonic cleaning method has the advantages of good cleaning effect and no damage to the filter material, but the equipment cost is high.
Fourth, cleaning cycle and precautions
1.Cleaning Cycle:According to the actual situation, the cleaning cycle is determined, and it is generally recommended to clean once a quarter. For the situation of poor water quality or large treatment load, the frequency of cleaning should be increased appropriately.
2.Notes:When cleaning, the water inlet valve and outlet valve should be closed first to avoid damage to the equipment or personnel**; When cleaning, an appropriate cleaning agent should be selected to avoid corrosion to the filter material; After cleaning, the sealing performance and fasteners of the equipment should be checked to ensure the normal operation of the equipment.