1TPH FRP Pure Water Reverse Osmosis Equipment Purifying Machine

1TPH RO System FRP Pure Water Reverse Osmosis Equipment Purifying Machine

The instrument (sensor) parameters of the water treatment system must be calibrated every 3-6 months to ensure the accuracy of equipment parameters. Because of the difference of surface water sources, the types of operating problems of reverse osmosis equipment are not the same in different places. Therefore, users should carefully analyze the running status of their own system. Especially in the characteristics of membrane pollution and system cleaning should be explored according to the actual situation to find out the solution to the problem suitable for the system.

For the outage protection process of reverse osmosis system, if conditions exist, it is recommended to adopt a suitable way for long-term protection. Avoid physical damage of reverse osmosis membrane caused by frequent start-stop under short-term protection or low pressure flushing conditions.

To sum up: the operating conditions of the reverse osmosis system with surface water as the water source are more complex than those of the underground water source. In order to achieve good operation effect, it is necessary to check the design, manufacture and operation of the equipment. Especially the optimization of the operating conditions and the management of the operating system are the key to the health of the equipment.

Reverse osmosis technology process

RO membrane itself is sensitive to the pH, temperature and specific chemicals of the influent. The water quality of the influent strictly requires the pH value range of 4~10, temperature <40℃, silt density index SDI<5, free chlorine <0.1mg·L-1, turbidity <1, iron content <0.1mg·L-1, etc. In order to meet the requirements of RO membrane water, raw water before entering the RO membrane system must first preprocessing (sedimentation, coagulation and microfiltration, ultrafiltration, activated carbon absorption, pH adjustment, etc.), then the pump pressure into the membrane module, the pressure under the action of raw water as water production through the RO membrane, and inorganic salts, organic matter and particle by RO membrane intercept on the other side of the membrane to form thick liquid. The concentrated solution can be recycled or reprocessed according to the requirements of the specific process. RO can be used with ultrafiltration, nanofiltration and other membrane devices to form an integrated membrane device.

Working Principle of Reverse Osmosis Water Treatment System:

When a pressure greater than osmotic pressure is applied on the saltwater side of the membrane, the flow of water is reversed and the water in the saltwater flows into the fresh side, a phenomenon called reverse osmosis.

Technical Specifications of Reverse Osmosis Water Treatment System:

Process flow of reverse osmosis water treatment system:

Raw water → original water tank → original water pump → multi-media filter (quartz sand filter)→ activated carbon filter → soft water processor → precision filter → high pressure pump → first stage reverse osmosis (RO) device → pure water tank → high pressure pump → second stage reverse osmosis → ultraviolet sterilization device → water point

Pretreatment dosing problem

1. Dosing problems of flocculant and coagulant aid:

The turbidity of the source water, PH value, the content of iron ion and the type of drug added in the subsequent system determine the type and dosage of the flocculant and coagulant aid. And dosage must do adaptability and dosage optimization test. Many RO users in this aspect of the work is not in place, resulting in the clarification of the pool water quality is not good.

2. The dosing problem of fungicides

For organic matter and bacteria and microorganisms in raw water, the user usually uses oxidizing media to kill, such as sodium hypochlorite, liquid chlorine, chlorine dioxide, etc. For some surface water sources, the bactericidal effect is not ideal due to the long-term addition of the above medium. At present, non-oxidizing fungicides, such as ZDH-881 and MDC-881, have longer killing effect, and can save the cost of subsequent reducing agent addition.

3. The addition of reducing agent

The addition of reducing agent should take into account the thoroughness of the reduction effect and the bacterial contamination after excessive addition. It is often found that after the user adds too much, the bacterial slime on the filter element is generated.

FAQ:

1, What are the inlet water quality requirements for ro water treatment system membrane components?

2. What is the material of ro water treatment system membrane?

Acetate membrane (CA) : mainly because of its resistance to chlorine, so it is still durable. But its suitable pH range is small, easy hydrolysis

Aromatic polyamide membrane (PA) : water almost can not have chlorine, only through a variety of pretreatment chlorine.


3. RO water treatment system configuration:

First-stage multi-stage process: if the recovery rate is not achieved in the first stage (50-65% in the first stage and 65-75% in the second stage), the multi-stage tandem filtration can be used. The effective cross-sectional area of each segment decreases. 2:2 and 2:3 and 4:2:1

Multi-stage process: when the first stage process cannot meet the effluent quality requirements (the first stage is generally ≤20μs/cm), the product water of the first stage process is sent to another reverse osmosis unit.

The arrangement of membrane components can be divided into series and parallel.