Embodiment
The preferable embodiment of the utility model comprises vehicle-mounted container 1 and sea water desalinating plant as shown in Figure 1, and described sea water desalinating plant is installed in the vehicle-mounted container 1.Described sea water desalinating plant comprises filtration unit and desalting equipment.
Described filtration unit comprises submerged ultrafiltration device 4, also comprises outstanding sand filter 7, self-cleaning filter 5.Vacuum primingpump 12 sucks the former water of seawater, obtains pre-treating seawater through outstanding sand filter 7, self-cleaning filter 5, submerged ultrafiltration device 4 successively, and pre-treating seawater temporarily leaves in the intermediate water tank 3.
Desalination just can obtain fresh water to pre-treating seawater through desalting equipment again.Described desalting equipment comprises reverse osmosis unit 2.Described reverse osmosis unit comprises reverse osmosis membrane stack, high-pressure pump 11, and the pre-treating seawater after the filtration pumps into the reverse osmosis membrane stack by high-pressure pump 11, through obtaining fresh water behind the reverse osmosis membrane stack.Also comprise security personnel's strainer 8, pre-treating seawater at first passes through security personnel's strainer 8 before entering described reverse osmosis unit 2.
Described desalting equipment also comprises energy recycle device 9, and the dense water that reverse osmosis unit 2 produces is discharged through energy recycle device 9 backs, in this process, the strong brine pressure of discharging is passed to the supply seawater, to reach the purpose of save energy.Also comprise topping-up pump 10, the pre-treating seawater after the filtration enters reverse osmosis unit 2 through energy recycle device 9, topping-up pump 10 successively.
Described sea water desalinating plant also comprises control device 6, is used to control the operation of each parts, can realize full-automatic operation and information-based transmission.
The utility model carries out desalting process as shown in Figure 2, by the seawater vacuum primingpump seawater is sucked outstanding sand filter and remove tiny sand grains and planktonic organism, outstanding sand filter is to utilize action of centrifugal force to divide tiny sand grains and the planktonic a kind of device of be difficult for removing in dried up, for subsequent disposal is prepared.
Afterwards, enter self-cleaning filter to remove the suspended substance of particle diameter more than 100 μ m in the water.It is with removing the suspended substance of particle diameter more than 100 μ m in the water that self-stip is filtered, and is the pretreating device of submerged ultrafiltration device, to ensure the normal operation of submerged ultrafiltration device.
Seawater after coarse filtration enters the submerged ultrafiltration device and removes colloid in the water, suspended substance, larger molecular organics etc., makes water outlet SDI (contamination density index)≤3, turbidity be lower than 1NTU.Ultrafiltration (UF) technology is independently used, and traditional water is handled complicated cohesion, clarification, filter plant and technical process as an alternative.Use the UF membrane technique, replace conventional pretreatment process,, prolong the cleaning interval and the work-ing life of reverse osmosis membrane, improve the reverse osmosis membrane water production rate, reduce system operation cost and all be of great benefit to for simplifying technical process.
Then, remove most of soluble salt part in the water, reach the use standard of fresh water through reverse osmosis unit.
Reverse osmosis is called for short RO, it is a kind of membrane separation technique that grows up in the sixties, its principle is that former water passes through reverse osmosis membrane under the effect of high pressure, thereby the solvent in the water reaches separation, purification, spissated purpose by high density to the lower concentration diffusion, because it is opposite with natural infiltration direction, therefore claim that it is reverse osmosis.Reverse osmosis also is widely used in concentrating/multiple fields such as recovery of pure water preparation, wastewater treatment, tap water and beverage, Chemicals except that using in brackish water, sea water desaltination.The main body of reverse osmosis unit is made up of reverse osmosis membrane stack and high-pressure pump two portions.Because the influent quality difference, high-pressure pump boosts to different pressure to water inlet and enters membrane stack, see through film as primary products water, and see through discharging of film as strong brine.The core of its design is to arrange the different water rate of recovery according to different raw water qualities, and makes system energy-conservation as much as possible by flow arrangement.
In the utility model, utilized energy recycle device that the strong brine pressure of discharging is passed to the supply seawater, efficiency of conversion is up to 94%~96%.Because the energy recovery of strong brine is abundant, only be 2.6kWh according to the ton water energy expenditure of calculating system.
Control device in the utility model based on industrial control computer, is selected for use by programmable logic controller (PLC) and field instrument, field control equipment and is formed.Realization is to the functions such as detection, control, warning, interlocking and accident treatment of whole process system.So that satisfy the needs of various operation conditions, guarantee the safety and economic operation of process system.Supervision and management function are undertaken by the touch-screen of operator station.
The vehicle-mounted sea water desalinating plant of the utility model is a container-type, become sea water desaltination (SWRO) special-purpose vehicle, little, the light weight of equipment volume, internal layout is reasonable, compact, the all devices that 10m3/h product water is exerted oneself only is arranged in 6m * 2.4m * 2m shelter, gross weight is 9.5t only, and being used for need be in the military and civilian department of coastal mobile operating.
The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.