Process system
Preprocessing unit
1) Pretreatment usually refers to the treatment process before the reverse osmosis device
(1) pretreatment system
Raw water first into the original tank buffer adjustment, pressurized by the original water booster pump, so that it can pass through the rear filter processing system, into the RO system. In order to ensure the reverse osmosis (RO) system water requirements, pretreatment by the quartz sand filter, activated carbon filter, water softener and security filter composition. In order to ensure that the pretreatment can be retained more detailed and more suspended solids and have better treatment effect, the use of high index design and increase the capacity of equipment handling. Under normal working conditions:
(2) quartz sand filter
Removal of suspended solids and colloids in water. Suspended solids and colloid will cause the quartz sand surface filter hole clogging, surface compaction, multi-media filter pressure increase, reduce efficiency, then need to enable the booster pump to adjust the flow backwash.
(3) activated carbon filter
Adsorption of water in the smell, remove the residual chlorine in the raw water, organic compounds, heterochromatic, heavy metal and other impurities. At the same time can effectively remove part of the particle size of 10-20 Å in the inorganic colloid, organic colloid and dissolved polymer impurities.
(4) water softener
The system through the strong acid cation exchange resin to remove water in the water, magnesium and other hardness of the ions, and fundamentally remove the hardness of ions in the presence of water. Completely effective solution to the production of equipment scaling problem, in order to achieve the safety of equipment, clean and efficient operation results.
(5) security (precision) filter
To further reduce the impact of small particles on the RO system, set the 5μ security filter as the RO system front filter. Precision filter role: precision filter is mainly used for the purpose of purification of water, especially for high water quality requirements of the field of microfiltration, precision filter can remove the main functions of water sediment, clay, rust, suspended solids, algae, Mud, corrosion products, macromolecular bacteria, organic matter and other small particles and other impurities, to achieve the purpose of water purification.
2) Reverse osmosis (RO) system:
The system uses reverse osmosis desalination process, reverse osmosis water 1.5m3 / h, due to the characteristics of multi-stage centrifugal high-pressure pump, requiring the safety of the filter outlet pressure of not less than 0.1MPa. System membrane components using the world's most advanced TFC composite membrane, the average single membrane membrane desalination rate of 99.3%. RO system design has been fully considered the excessive concentration of fouling and precipitation. RO device is equipped with a high desalination rate of ESPA series membrane element, the membrane size is standard 4 "x 40". Can remove water turbidity, color, hardness, and radium, uranium and other radioactive elements, trihalomethanes, asbestos and other carcinogenic substances and inorganic ions, especially harmful lead, antimony, arsenic, cadmium, aluminum, copper and other metal ions Nitrite, pesticides and other chemical substances. RO membrane membrane pore 5 Å (1Å = 1 × 10 ,10m), only the molecular weight of 18 or so molecules can pass
1.2 Reverse osmosis (RO) unit
The system uses a reverse osmosis desalination process + mixed bed, a reverse osmosis water 1.m3 / h, due to the characteristics of multi-stage centrifugal high pressure pump, high pressure pump inlet pressure is not less than 0.1MPa.
System membrane components using the world's most advanced TFC composite membrane, the average single membrane membrane desalination rate of 99.6%. RO system design has been fully considered the excessive concentration of fouling and precipitation. RO device equipped with high desalination rate, high-throughput reverse osmosis -4040 series membrane module, the membrane size of the standard 4 "× 40", were installed in the membrane tube.
The pretreatment of the reverse osmosis device is more perfect, the number of times the cleaning of the membrane module can be reduced, but it is impossible to completely ensure that the membrane module is not contaminated. In the event of membrane contamination, chemical cleaning and cleaning of the chemical Equipped with cleaning solution tank, cleaning pump, through the reverse osmosis components reserved for cleaning interface to ensure the efficient handling of the system performance.
3.2 Central Control System Description
The control system is designed for automatic, manual operating systems.
System RO device, pump start and stop can be automatically run through the control system, can also be manually controlled on the main control panel. The use of differential pressure level operation, can reduce the misuse, reduce the impact of human factors, improve system operation safety, reliability, stability.
Valve control
Production of water flow control valve to hand-based, backwash valve automatic operation to ensure that the reverse osmosis system running a good state.
Pump control
Pump control set up manual, automatic two ways to start and stop.
Automatically by the master control panel on the default control system, manually set by the main control panel on the switch button to implement. These two modes of operation can be done by the switch on the main control panel.
High pressure pump protection system
High and low voltage protection, in the high-pressure pump at the entrance with a low-voltage protection switch, when the water supply is low (the performance of the inlet pressure is low), lower than a set value (normal), the switch will send a signal to stop the high-pressure pump Start, protect the high-pressure pump is not working in the case of idle.
Reverse osmosis (RO) start and stop protection
In order to prevent the wrong operation of RO, in the RO water side to protect the pressure switch with high pressure, when the water pressure is higher than the specified value, the pressure switch will send a corresponding signal, the device at the same time take protective action, the control system to send an alarm signal. The use of blasting film, the water pressure will break through the burst film to play a role in diarrhea, but the high pressure pump is still running, and the system will not have alarm signal. When the system is in the automatic state, regardless of start and stop, there are 3-4min rapid flushing to ensure that the RO system during the outage to reduce the membrane surface impurity precipitation, improve membrane efficiency.
Level control
In the water tank set high and low level controller, according to the level of water to send a signal to control whether the preparation of pure water system to achieve the purpose of automatic operation.
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