Product Details:
1, the process
With the development of economy and the improvement of living standards, people enjoy the convenience of various modern facilities at the same time, eager to easily and quickly drink high quality, clean drinking water. Ordinary tap water due to serious pollution of water, the traditional coagulation, sedimentation, filtration and other processes mainly to remove suspended solids and colloid, and in the process of transport to the user in the secondary pollution is more serious, therefore, for residential quarters or public buildings to provide quality Drinking water problems mention the construction schedule. Centralized set of centralized water stations, the production of quality drinking water, water distribution through the delivery system to the water points. The process for domestic water and direct drinking water into one, the system process flow chart is as follows:
2, the water technology and equipment
The system process consists of raw water pretreatment, nanofiltration device, disinfection treatment, frequency conversion constant pressure water supply system, electrical control system, water supply and circulation pipe network system to ensure that the production of water can be directly consumed.
2.1 Pretreatment section
(1) raw water pump
The system requires raw water (city tap water) water supply pressure range of 0.2MPa-0.4Mpa, in order to make the follow-up equipment required flow and pressure to meet the processing requirements, set a raw water pump, the system automatically running the state, its operation and after the water equipment Set the electrical control interlock, and the use of reliable pressure control technology measures to ensure that the pretreatment unit filtration, backwashing, washing process and operational safety requirements.
(2) quartz sand filter
Multi-media filter filled with two kinds of specifications of the quartz sand filter and anthracite, quartz sand with sufficient mechanical strength, neutral and acidic water in the chemical stability, strong adsorption capacity, interception capacity, mainly for the filter Suspended matter, small molecule organic matter, part of colloidal impurities, particle size greater than 20um of mechanical impurities. Pressure water from the upper part of the filter from top to bottom through the filter layer, the filter gap on the suspended matter from the role of sieve, suspended solids were trapped in the filter surface, so that the water was filtered to clarify the water turbidity <2 ~ 3mg / L, in line with SDI ≤ 4.
In the process of membrane preparation, the pretreatment system with tap water or deep well water as raw water is a commonly used pre-filtration equipment. Water quality, and affect the use of membrane components performance and life.
(3) activated carbon filter
Activated carbon filter is mainly the use of granular activated carbon adsorption mechanism to adsorb organic matter and chlorine in water, but also can remove colloids, iron compounds, suspended solids, reduce color, bacteria and so on. Activated carbon filter should ensure that the residual chlorine <0.1PPM, SDI ≤ 4.
(4) water softener
The raw water is exchanged with Na + ions in the resin by the Ca + The residual hardness of the raw water after a softening treatment is generally less than 0.03mmol / L, so that the membrane separation device concentration side of the Langerhigh index greater than 0.2, the reverse osmosis concentrated water, especially the reverse osmosis pressure vessel in the last one The concentration of CaCO3, MgCO3, CaSO4, MgSO4, BaSO4, SrSO4, SiO2 and other chemical substances on the concentrated side of the membrane element is larger than the equilibrium dissolution constant, and the concentration of CaCO3, MgCO3, CaSO4, MgSO4, The stable operation.
When the cation exchange resin to a certain extent, the exchange capacity is saturated, this time the need for industrial regeneration of salt on the resin regeneration, to restore its regeneration capacity.
2.2 nanofiltration device
For the whole set of water equipment, the core part of the device has a compact structure, small footprint, high water production and energy consumption and other advantages. The device relies on the high pressure pump to provide greater pressure than the osmotic pressure of the sodium filter, through the sodium filter can continuously remove more than 95% of the water and most of the organic matter, bacteria, viruses, etc., these substances in the form of concentrated water Drainage of drainage pipes.
Core component description
1) membrane element
In order to ensure the water quality and water to meet the requirements, the reverse osmosis device selection of the United States Hyde can ESNA1-4040 nanofiltration membrane, water quality and other advantages.
ESNA1 ultra low pressure roll high desalination rate composite membrane --- membrane material for the aromatic polyamide composite material, the effective membrane area of 85ft2, in the test solution of 500ppm NaCl solution, the operating pressure of 75psi (0.52MPa) case, run 30 After the test data for the minutes: the average desalination rate of 90%, through the water 2600gpd (7.9m3 / d).
2) membrane shell (pressure vessel): SS304 stainless steel pressure vessel.
3) high pressure pump
The use of imported stainless steel vertical multi-stage centrifugal pump so that the sodium membrane membrane membrane components into a certain pressure to meet the osmotic pressure to make water molecules through the sodium filter, so as to achieve the purpose of ion and water separation. In order to protect the high-pressure pump and sodium filter components, the use of imported high and low voltage protection switch.
4) electrical integrated control system: to achieve sodium filter device overload, short circuit, open circuit, leakage protection; raw water inlet solenoid valve opening and closing, low pressure protection, high pressure pump water protection; membrane module high voltage protection; system boot automatically, Membrane components rinse; water tank high water level when the sodium filter device automatically shut down, water tank low water level automatically boot; set reset button.
5) water quality monitoring: raw water, water conductivity on-line monitoring instruments, continuous monitoring of product water quality.
6) pressure instrument panel: pressure gauge continuous monitoring of sodium filter system water, drainage, water pressure and pressure difference, indicating the operation of equipment.
7) Flow panel: product water, concentrated water pipelines are equipped with flow measurement device, so that the operator to monitor and adjust the system running water and system water recovery rate, the system according to the design specifications for operation and operation.
8) sodium device pipeline valve system: for the device water system process function use, the use of sanitary UPVC pipes, valves.
2.3 disinfection
(1) UV disinfection
As the raw water without any impurities, in order to prevent secondary pollution of water, so in the pure water tank, the need for post-processing. The use of ultraviolet disinfection, can destroy the nuclei in the bacteria, hinder the bacteria and enzymes in the synthesis of bacteria to kill bacteria, sterilization efficiency of up to 99.6% or more, pollution-free, and equipment operation and management are simple and convenient.
(2) Ozone generator
Ozone is a strong oxidant, can quickly kill bacteria, viruses, delay effect is good, ozone chemical properties are very unstable, easy to break down into oxygen, can increase the water oxygen, so that the water is full of activity. In addition, ozone is a non-toxic broad-spectrum disinfectant, the role of the chemical process only produce oxides and oxygen, unlike chlorine and other chemicals, leaving a toxic residue.
2.4 Automatic control system and protection system
The entire control system using PLC programmable controller, solenoid valve, pressure sensor and level controller interlock control, fully automated operation of a full set of equipment.
2.5, constant pressure water supply system
Domestic water supply pipe network system is divided into two water supply zoning, set frequency control constant pressure water supply pump set, low area using proportional pressure reducing valve vertical partition water supply. High area using frequency control constant pressure water supply pump group direct water supply. The maximum static pressure of the minimum drinking water equipment is less than 0.35MPa.
Audited Supplier 
){kind=link}
){kind=link}