120t/hPrecautions for the design of reverse osmosis water treatment equipment:

Generally speaking, we recommend large onesReverse osmosis water treatment equipmentExplosive membrane devices should be installed on the product water pipeline. The installation of rupture discs is to prevent operational management personnel from neglecting to open the product water outlet valve during equipment operation (the product water outlet valve is installed to close the system for membrane component cleaning); The second is to prevent accidents in the system that may cause excessive back pressure and damage to the reverse osmosis membrane.Reverse osmosis water treatment equipmentThe design should ensure that the pressure drop of a single membrane element during operation and cleaning is less than 15 PSI, as excessive pressure drop acting on the membrane element can cause the membrane roll to protrude, resulting in membrane roll protrusion and mechanical damage to the membrane bag.Reverse osmosis water treatment equipmentWhen designing, non compliant filters should be installed before the security filter is importedReverse osmosis water treatment equipmentWater discharge valve required for water inlet.Reverse osmosis water treatment equipmentWhen designing, it should be considered that the system can perform low-pressure flushing on the membrane system every time it starts or stops. In addition, it can be used during the short-term (several days) shutdown period of the systemReverse osmosis water treatment equipmentRinse the membrane system with product water.Reverse osmosis water treatment equipmentAn instrument should be installed on the control device to monitor the temperature of the feedwater. As the water production of the membrane system is closely related to the water temperature, the feedwater temperature should be monitored. Only by monitoring the water temperature in real-time during operation can the standardized water production be calculated. Additionally, largeReverse osmosis water treatment equipmentIt can record the water temperature in real-time and has corresponding protection functions such as over limit alarm and over limit automatic discharge, because the membrane element will be damaged when the water temperature exceeds 45 ℃.Reverse osmosis water treatment equipmentPressure gauges capable of accurately measuring instantaneous pressure should be installed between each section of the membrane module arrangement, in order to calculate the pressure drop of each section and membrane element, and to standardize the system's water production and salt permeability. Because the salt permeability, water production, and pressure drop in each section of the membrane system are allReverse osmosis water treatment equipmentImportant data for performance analysis. existIn reverse osmosis water treatment equipmentA pressure gauge (or differential pressure gauge) should be installed at the inlet and outlet of the 5 μ security filter to monitor the pressure difference between the inlet and outlet of the filter. When the pressure difference between the inlet and outlet of the security filter reaches (generally controlled within 0.1Mpa), the operation management personnel should be prompted to replace the filter element in a timely manner.

Install pressure gauges and pressure controllers at the inlet and outlet of the reverse osmosis high-pressure pump. Firstly, ensure that an alarm is triggered to stop the reverse osmosis high-pressure pump when the inlet pressure is lower than the set value; Secondly, ensure that once the outlet pressure of the reverse osmosis high-pressure pump remains above the set value for a specified period of time (a few seconds), the system will alarm and stop the pump, thereby ensuringReverse osmosis water treatment equipmentSafe operation. And inReverse osmosis water treatment equipmentWhen starting, it is recommended to implement interlocking control between the start of the high-pressure pump and the electric slow opening valve at the outlet of the high-pressure pump. In large scaleReverse osmosis water treatment equipmentEach section should be equipped with high-performance, accurate and reliable flow meters to provide effective data for the standardization of equipment operation. It is generally recommended that both the total product water flow meter and the concentrated water flow meter should have on-site indication, water accumulation, and recording functions; The water flow rate and concentrated water flow rate of each section of the product should have on-site indications and cumulative water volume records, in order to calculate the water supply rate, recovery rate, and overall water recovery rate of each section and the entire system.

largeReverse osmosis water treatment equipmentThe system dosing (acid, scale inhibitor, reducing agent, etc.) should operate under accurate automatic control mode, generally using the operation mode of automatic dosing according to the flow signal ratio based on the water supply flow signal (pulse or 4-20mA signal). small-scaleReverse osmosis water treatment equipmentGenerally, manual setting and control are used.

II20t/hCleaning operation of mechanical filters in reverse osmosis water treatment equipment:

1. Exhaust: Open the upper exhaust valve and the upper inlet valve to send water into the filter and continuously feed water into the upper exhaust valve.

2. Positive washing: Open the lower and upper drain valves to allow water to pass through the filter layer from top to bottom, with an inlet flow rate of 500t/h, until the drainage is clear and transparent, which takes about 10-20 minutes.
3. Operation: Open the water valve to supply water to the downstream equipment.
4. Backwash: After running for a period of time, the equipment may trap dirt and form a filter cake on the surface. When the pressure difference between the inlet and outlet of the filter is greater than 0.05-0.08MPa, backwash should be carried out to ensure smooth water flow. Open the drain valve, backwash valve, and bypass valve, and flush with a flow rate of 50t/h for about 20-30 minutes until the water is clear. Attention: After backwashing, the equipment must be cleaned in the forward direction before it can be put into operation.

III20t/hScale inhibitor system for reverse osmosis water treatment equipment:

The metering pump and high-pressure pump start and stop simultaneously, and operate synchronously. The scale inhibitor is MDC150 produced in the United States. Scale inhibitor dosage: According to the hardness of the raw water, the dosage per ton of raw water is calculated to be 3-4 grams. If the system has a water inflow of 10t/h, the dosage per hour is 30-40 grams.
Configuration of scale inhibitor: Add 90 liters of water to the chemical tank, then slowly add 10kg of scale inhibitor and mix evenly. Adjust the measuring range of the metering pump to the corresponding scale.
Attention: The low ratio concentration of scale inhibitor should not be less than 10%.

420t/hPrecision filters for reverse osmosis water treatment equipment:

The precision filter has a filtration accuracy of 5 μ m. To maintain the filtration accuracy, the system does not have a backwash pipeline.Precision filterThe filter cartridge inside is generally used for 2-3 months, and can be extended to 5-6 months depending on the actual water treatment capacity. Sometimes, to maintain water flow, the filter element can also be replaced in advance.

520t/hIn reverse osmosis water treatment equipmentroCleaning of membrane

reverse osmosis membraneDue to the long-term accumulation of impurities in water, components are prone to scaling, leading to a decrease in water production and desalination rate. At this point, chemical cleaning of the membrane components is required. Cleaning should be done by contacting the supplier.
When the device has one of the following conditions, it needs to be cleaned:

1. Under normal pressure, the product water flow rate drops to 10-15% of the normal value;

2. In order to maintain normal product water flow, the temperature corrected feedwater pressure has increased by 10-15%;

3. Reduce product water quality by 10-15%; Salt permeability increases by 10-15%;

4. Increase pressure by 10-15%;

5 The pressure difference between the RO sections increases significantly.

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