1000L/H Double Stage Reverse Osmosis System Pure Water Purifying Machine

Water Purifying Machine Double Stage Reverse Osmosis Pure Water 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

 
 

Operation process of reverse osmosis system equipment:

Strictly implement the operation steps in the operating procedures by operators.

In the first year of operation of the pretreatment system, experiments and adjustments should be carried out no less than 4 times according to the characteristics of the water source conditions for the operation indexes and the amount of chemicals added, so as to accumulate the basis for the operation procedures of the second year of border trimming.

In the process of operation, at least once a month to make a "water quality analysis report" to analyze the change of water source conditions, and timely modify the operation parameters and dosage.

The standardization of reverse osmosis data should be done every two weeks, which is very necessary to master the change trend of reverse osmosis operation. Many water treatment systems currently in operation lack corresponding work, which leads to the expansion of small problems in equipment operation.

Classic model of reverse osmosis system:

1. Preferential adsorption capillary pore model: No pore was found under weak point dry state electron microscope. The wet membrane specimens are not electron microscopic samples.

2. Dissolution diffusion model: no holes are considered.

3. Dry closed wet open model: the most appropriate modern reverse osmosis mechanism model that can explain the unity of models 1 and 2. The "dry-closed wet-open" reverse osmosis model unifies the two most classical reverse osmosis mechanism models, the fine pore model and the dissolved diffusion model.

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.