The two-pass reverse osmosis device
Technical field
The utility model relates to a kind of purified water production equipment, particularly relates to a kind of two-pass reverse osmosis device.
Background technology
In the pharmaceutical manufacturing process, often need to use pure water pollution-free, free from foreign meter to carry out the preparation of soup.Current, use the two-pass reverse osmosis device to produce pure water more, the efficient of two-pass reverse osmosis device desalination is very high, but but can not remove the CO in anhydrating
2, the pure water electric conductivity of producing is too high, does not meet the requirement of required pure water in the pharmaceutical industry, and the two-pass reverse osmosis device produces general direct the secondary concentrated water drainage is bled off in process of production, has caused very big waste and pollution.
The utility model content
The purpose of the utility model promptly is to overcome the deficiency of present technology, and a kind of two-pass reverse osmosis device is provided, and the pure water that solves existing two-pass reverse osmosis device production is because of CO
2Too high levels causes the too high problem of electric conductivity, and the dense water of secondary is utilized once more, avoids producing waste and pollution.
The utility model is realized through following technical scheme: the two-pass reverse osmosis device; Comprise one-level HPP, first-stage reverse osmosis device, secondary HPP and the two-pass reverse osmosis device of pipe connection successively; Also be provided with a water tank between described first-stage reverse osmosis device and the secondary HPP; To water tank, concentrated water drainage mouth place is provided with a vacuum breaker to the concentrated water drainage mouth of two-pass reverse osmosis device through pipe connection, and going back pipe connection on the water tank has an alkali liquid tank.
The ingress of said one-level HPP is provided with a ultra-fine filter.
Pipeline is provided with a de-gassing vessel between said first-stage reverse osmosis device and the water tank.
Be provided with a volume pump between said alkali liquid tank and the water tank.
The beneficial effect of the utility model is: through at the fresh water that goes out to the one-level permeator through the degassing with add alkali lye, thereby reduced the CO in the water
2Content makes electric conductivity be lower than 1 μ s/cm, has satisfied the requirement of required pure water in the pharmaceutical manufacturing, and the dense water of secondary is utilized once more, has avoided producing waste and pollution.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Among the figure, 1-one-level HPP, 2-first-stage reverse osmosis device, 3-secondary HPP, 4-two-pass reverse osmosis device, 5-water tank, 6-concentrated water drainage mouth, 7-vacuum breaker, 8-alkali liquid tank, 9-ultra-fine filter, 10-de-gassing vessel, 11-volume pump.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to specify:
As shown in Figure 1; The two-pass reverse osmosis device; Comprise one-level HPP 1, first-stage reverse osmosis device 2, secondary HPP 3 and the two-pass reverse osmosis device 4 of pipe connection successively, also be provided with a water tank 5 between described first-stage reverse osmosis device 2 and the secondary HPP 4, the concentrated water drainage mouth 6 of two-pass reverse osmosis device 4 arrives water tank 5 through pipe connection; Concentrated water drainage mouth 6 places are provided with a vacuum breaker 7, and going back pipe connection on the water tank 5 has an alkali liquid tank 8.
The ingress of said one-level HPP 1 is provided with a ultra-fine filter 9, and water inlet is filtered earlier, has increased the work-ing life of counter-osmosis device.
Pipeline is provided with a de-gassing vessel 10 between said first-stage reverse osmosis device 2 and the water tank 5, the fresh water that first-stage reverse osmosis device 2 is produced outgas processings, the CO in the minimizing water earlier
2Content, the throwing amount of minimizing alkali lye.
Be provided with a volume pump 11 between said alkali liquid tank 8 and the water tank 5, can reach the quantitative input of alkali lye.
The principle of work of the utility model: after water filters through ultra-fine filter 9; Be transported to first-stage reverse osmosis device 2 through one-level HPP 1 and handle, the one-level fresh water of the production of first-stage reverse osmosis device 2 is transported to water tank 5 after the de-gassing vessel degassing, and the water in the water tank 5 is carried out after pH value measures; Dropping into alkali lye through volume pump 11 neutralizes; Secondary HPP 3 is transported to the water in the water tank 5 and carries out primary treatment in the two-pass reverse osmosis device 4 again, and the secondary fresh water that two-pass reverse osmosis device 4 is produced promptly is qualified pure water, and the dense water of secondary that two-pass reverse osmosis device 4 is produced is back in the water tank 5 again and utilizes once more; Not only save resource; Reduce discharging, and the pH value of the dense water of secondary is higher than the pH value of one-level fresh water, can reduces the injected volume of alkali lye.