Secondary reverse osmosis membrane integrated equipment of large seawater desalination system

Abstract

The utility model relates to secondary reverse osmosis membrane integrated equipment of a large seawater desalination system. The secondary reverse osmosis membrane integrated equipment comprises a secondary reverse osmosis membrane group, a secondary reverse osmosis water inlet header pipe, a secondary reverse osmosis high-pressure pump, an adjusting water tank, a chemical cleaning produced water return pipeline, a chemical cleaning water inlet pipeline, a secondary reverse osmosis membrane group concentrated water header pipe and a secondary reverse osmosis membrane group total produced water pipe, the secondary reverse osmosis water inlet header pipe is connected with a water inlet of the secondary reverse osmosis membrane group through a water inlet pipe, the tail end of the secondary reverse osmosis water inlet header pipe is connected with a water inlet of the adjusting water tank, and the water outlet side of the reverse osmosis membrane group is respectively connected with a concentrated water pipe and a secondary reverse osmosis membrane group total water production pipe; the concentrated water pipe is respectively connected with a concentrated water main pipe of the second-stage reverse osmosis membrane group and a chemical cleaning produced water return pipeline, the produced water of the first-stage reverse osmosis membrane group is further treated, product water with higher quality is obtained, and the construction cost is saved on the premise of meeting the production requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to sea water desalination technical field especially large -scale sea water desalination system secondary reverse osmosis membrane integrated equipment. BACKGROUND

[0002] In the sea water desalination technology, the water quality of the primary reverse osmosis membrane group is influenced by various factors, including the service time of the membrane group, the pollution condition, the temperature condition, etc., and the user of the desalination water usually has a higher requirement for the stability of the water quality, so sometimes the water quality of the primary reverse osmosis membrane group cannot meet the requirement of the user, at this time, the secondary reverse osmosis system is needed to further process the water produced by the primary reverse osmosis to improve the water quality, the secondary reverse osmosis system is a kind of equipment for further improving the water quality of the product water with the water produced by the primary reverse osmosis as the inlet water, and the water quality of the product water can be flexibly adjusted through the secondary reverse osmosis system, but in the general secondary reverse osmosis system, a buffer tank is usually needed to be built at the inlet end, the water produced by the primary reverse osmosis enters the buffer tank, and then enters the membrane group through the secondary reverse osmosis high-pressure pump for processing, which will increase the total construction cost. SUMMARY

[0003] To solve the above technical problems, the utility model provides a kind of large -scale sea water desalination system secondary reverse osmosis membrane integrated equipment.

[0004] The utility model discloses the following technical scheme is realized: large -scale sea water desalination system secondary reverse osmosis membrane integrated equipment including secondary reverse osmosis membrane group, secondary reverse osmosis inlet main pipe, secondary reverse osmosis high-pressure pump, regulating water tank, chemical cleaning water backflow pipe line, chemical cleaning inlet pipe line, secondary reverse osmosis membrane group concentrated water main pipe, secondary reverse osmosis membrane group total water pipe, secondary reverse osmosis inlet main pipe is connected with the water inlet of secondary reverse osmosis membrane group by inlet pipe, the water inlet of regulating water tank is connected at the end of secondary reverse osmosis inlet main pipe, the water outlet side of secondary reverse osmosis membrane group is connected with concentrated water pipe and secondary reverse osmosis membrane group total water pipe respectively, concentrated water pipe is connected with secondary reverse osmosis membrane group concentrated water main pipe and chemical cleaning water backflow pipe line respectively.

[0005] Secondary reverse osmosis high-pressure pump is installed on inlet pipe, and inlet pipe is connected with chemical cleaning inlet pipe line on the pipe section between secondary reverse osmosis high-pressure pump and secondary reverse osmosis membrane group.

[0006] Regulating water tank is connected with outlet pipe and emptying pipe respectively, breathing valve is arranged on outlet pipe, and emptying valve is arranged on emptying pipe.

[0007] Regulating water tank adopts glass steel material, and the liquid level of regulating water tank is not less than 2 meters.

[0008] Secondary reverse osmosis inlet main pipe is provided with reagent adding point, and the reagent adding point includes scale inhibitor adding point and bactericide adding point.

[0009] The water outlet pipe end is provided with a water quality detection point.

[0010] Compared with the prior art, the beneficial effects of the utility model lie in: further processing the water produced by the first reverse osmosis membrane group to obtain product water with higher quality, and saving construction cost under the premise of meeting production requirements; setting a breather valve on the water outlet pipe of the adjusting water tank to prevent the water tank from being damaged due to negative pressure. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall connection structure of the utility model;

[0012] Main symbol explanation:

[0013] 1, secondary reverse osmosis water inlet main pipe; 2, secondary reverse osmosis high-pressure pump; 3, chemical cleaning water inlet pipeline; 4, adjusting water tank; 5, water outlet pipe; 6, breather valve; 7, emptying pipe; 8, emptying valve; 9, secondary reverse osmosis membrane group total water pipe; 10, concentrated water pipe; 11, secondary reverse osmosis membrane group concentrated water main pipe; 12, chemical cleaning water production backflow pipeline; 13, secondary reverse osmosis membrane group; 14, water inlet pipe; 15, scale inhibitor dosing point; 16, bactericide dosing point; 17, water quality detection point. DETAILED DESCRIPTION

[0014] Next, the utility model will be further described in combination with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.

[0015] Embodiment:

[0016] Please combine Figure 1 The large-scale seawater desalination system secondary reverse osmosis membrane integrated equipment of the embodiment comprises a secondary reverse osmosis membrane group 13, a secondary reverse osmosis water inlet main pipe 1, a secondary reverse osmosis high-pressure pump 2, an adjusting water tank 4, a chemical cleaning water production backflow pipeline 12, a chemical cleaning water inlet pipeline 3, a secondary reverse osmosis membrane group concentrated water main pipe 11, and a secondary reverse osmosis membrane group total water pipe 9, the secondary reverse osmosis water inlet main pipe 1 is connected with the water inlet of the secondary reverse osmosis membrane group 13 through a water inlet pipe 14, the end of the secondary reverse osmosis water inlet main pipe is connected with the water inlet of the adjusting water tank 4, the water outlet side of the secondary reverse osmosis membrane group 13 is connected with the concentrated water pipe 10 and the secondary reverse osmosis membrane group total water pipe 9 respectively, and the concentrated water pipe 10 is connected with the secondary reverse osmosis membrane group concentrated water main pipe 11 and the chemical cleaning water production backflow pipeline 12 respectively.

[0017] The secondary reverse osmosis high-pressure pump 2 is installed on the water inlet pipe 14, and the water inlet pipe 14 is connected with the chemical cleaning water inlet pipeline 3 on the pipe section between the secondary reverse osmosis high-pressure pump 2 and the secondary reverse osmosis membrane group 13.

[0018] Chemical cleaning water return pipeline 12, chemical cleaning water inlet pipeline 3 are arranged according to prior art, and on-line chemical cleaning is carried out on the membrane group by valve switching according to the pollution condition of the membrane group.

[0019] The adjusting water tank 4 is respectively connected with a water outlet pipe 5 and a emptying pipe 7, a breather valve 6 is arranged on the water outlet pipe 5, and an emptying valve 8 is arranged on the emptying pipe 7.

[0020] The adjusting water tank 4 is made of glass fiber reinforced plastic, and the total water inlet flow of the secondary reverse osmosis membrane group 13 needs to be ensured to be less than the water production flow of the primary reverse osmosis membrane group during operation, and meanwhile, the liquid level of the adjusting water tank needs to be ensured to be not less than 2 meters.

[0021] The secondary reverse osmosis water inlet main pipe is provided with a medicament adding point, and the medicament adding point includes a scale inhibitor adding point 15 and a bactericide adding point 16. The scale inhibitor adding point 15 is arranged, the adding time and adding amount are determined according to the water inlet condition of the membrane group, and the surface of the membrane element is prevented from being scaled. The bactericide adding point 16 is arranged, the adding time and adding amount are determined according to the water inlet condition of the membrane group, and the bacteria and other microorganisms in the water inlet are killed to prevent the membrane element from being polluted.

[0022] A water quality detection point 17 is arranged at the end of the water outlet pipe, and the final quality of the produced water can be monitored at any time.

[0023] The breather valve 6 is arranged on the water outlet pipe of the adjusting water tank, and the water tank is prevented from being damaged due to negative pressure. The adjusting water tank is made of glass fiber reinforced plastic, and the construction cost can be saved under the premise of meeting the production requirements.

[0024] In the embodiment Figure 1 The secondary reverse osmosis membrane integrated equipment in the large-scale seawater desalination system shown in the embodiment has three sets of reverse osmosis membrane groups, which are numbered as 1#, 2# and 3# respectively. When in operation, the number of the secondary reverse osmosis membrane groups put into operation or the water production flow of a single set of membrane group can be flexibly adjusted according to the requirements of the user on the water quality of the supplied water, and when the number of the put-in groups is increased, the single set of reverse osmosis equipment only needs to be connected in parallel to the integrated equipment.

[0025] Part of the water produced by the primary reverse osmosis membrane group enters the secondary reverse osmosis membrane group through the secondary reverse osmosis high-pressure pump, is treated, and then the produced water enters the secondary reverse osmosis membrane group total water production pipe and flows to the product water tank. The concentrated water enters the secondary reverse osmosis membrane group concentrated water main pipe and returns to the primary reverse osmosis water inlet tank. The water quantity is saved, the water quality of the primary reverse osmosis membrane group is improved, and the working pressure of the reverse osmosis membrane group is reduced. The other part of the water produced by the primary reverse osmosis membrane group directly enters the adjusting water tank and then enters the product water tank through the adjusting water tank. The adjusting water tank is arranged at the secondary reverse osmosis membrane group water inlet main pipe. Compared with the buffer tank arranged between the primary and secondary reverse osmosis membrane groups, the adjusting water tank also has the buffering effect on the water inlet of the secondary reverse osmosis membrane group, but the construction cost of the buffer tank is saved, and the reasonable operation can fully meet the water supply demand of the secondary reverse osmosis membrane group.

[0026] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application belong to the scope of protection required by the present application.

Claims

1. A large-scale seawater desalination system secondary reverse osmosis membrane integrated device, characterized in that, The secondary reverse osmosis membrane group, the secondary reverse osmosis water inlet main pipe, the secondary reverse osmosis high-pressure pump, the adjusting water tank, the chemical cleaning water production backflow pipe, the chemical cleaning water inlet pipe, the secondary reverse osmosis membrane group concentrated water main pipe and the secondary reverse osmosis membrane group total water production pipe are connected.

2. The large-scale seawater desalination system secondary reverse osmosis membrane integration apparatus of claim 1, wherein, The secondary reverse osmosis high-pressure pump is installed on the water inlet pipe, and the water inlet pipe is connected with the chemical cleaning water inlet pipe on the pipe section between the secondary reverse osmosis high-pressure pump and the secondary reverse osmosis membrane group.

3. The large-scale seawater desalination system secondary reverse osmosis membrane integration apparatus of claim 1, wherein, The adjusting water tank is connected with the water outlet pipe and the emptying pipe, the water outlet pipe is provided with a breathing valve, and the emptying pipe is provided with an emptying valve.

4. The large-scale seawater desalination system secondary reverse osmosis membrane integration apparatus of claim 1, wherein, The adjusting water tank is made of glass fiber reinforced plastic, and the liquid level of the adjusting water tank is not less than 2 m.

5. The large-scale seawater desalination system two-stage reverse osmosis membrane integration apparatus of claim 1, wherein, The secondary reverse osmosis water inlet main pipe is provided with a reagent adding point, and the reagent adding point includes a scale inhibitor adding point and a bactericide adding point.

6. The large-scale seawater desalination system two-stage reverse osmosis membrane integration apparatus of claim 3, wherein, The water outlet pipe is provided with a water quality detection point at the end.

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