Reverse osmosis membrane integrated equipment of large seawater desalination system

Abstract

The utility model relates to reverse osmosis membrane integrated equipment of a large seawater desalination system, which comprises a reverse osmosis membrane water inlet tank and a reverse osmosis membrane group, the reverse osmosis membrane water inlet tank adopts a higher construction elevation, and the bottom of the reverse osmosis membrane water inlet tank is connected with a water inlet port of a reverse osmosis membrane group main water inlet pipe. A water outlet port of the reverse osmosis membrane group main water inlet pipe is connected to the water inlet side of the reverse osmosis membrane group, the reverse osmosis membrane group main water inlet pipe is connected with a chemical cleaning water inlet pipe, and the water outlet side of the reverse osmosis membrane group is connected with a chemical cleaning produced water return pipe and a chemical cleaning concentrated water return pipe; the chemical cleaning produced water return pipe comprises a front-end produced water main pipe and a rear-end produced water main pipe, the chemical cleaning concentrated water return pipe and the rear-end produced water main pipe are connected with the chemical cleaning circulating pipe, the equipment is complete and reliable, the investment cost is low, the operation cost is low, and the water production scale is large.

Description

TECHNICAL FIELD

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

[0002] Membrane sea water desalination technology is a mainstream technology in the field of sea water desalination, and currently 70% of the total production capacity of domestic sea water desalination adopts membrane sea water desalination technology. At present, most reverse osmosis sea water desalination equipment has small water production scale, and the reverse osmosis membrane sea water desalination technology is mostly applied to small sea water desalination engineering, and cannot fundamentally solve the problem of lack of fresh water resources in coastal areas. In order to make desalination water become an important fresh water source in the region and meet the water demand of industry and residents, it is necessary to expand the water production scale of sea water desalination engineering, and the investment cost of large-scale sea water equipment is higher, and the cost of desalination water per ton is higher. CONTENT OF THE UTILITY MODEL

[0003] To solve the above technical problems, the utility model provides a kind of large -scale sea water desalination system reverse osmosis membrane integrated equipment can be low energy consumption, water production scale is big.

[0004] The utility model adopts the following technical scheme to realize: large -scale sea water desalination system reverse osmosis membrane integrated equipment includes reverse osmosis membrane water inlet pool, reverse osmosis membrane group, the reverse osmosis membrane water inlet pool adopts higher construction elevation, and the reverse osmosis membrane water inlet pool bottom is connected with the water inlet port of reverse osmosis membrane group total water inlet pipe, the water outlet port of reverse osmosis membrane group total water inlet pipe is connected in the water inlet side of reverse osmosis membrane group, and the reverse osmosis membrane group total water inlet pipe is connected with chemical cleaning water inlet pipe, and the water outlet side of reverse osmosis membrane group is connected with chemical cleaning water production backflow pipe, chemical cleaning concentrated water backflow pipe, the chemical cleaning water production backflow pipe includes front end water total pipe and rear end water total pipe, and the chemical cleaning concentrated water backflow pipe and rear end water total pipe are connected with chemical cleaning circulation pipe.

[0005] The reverse osmosis membrane group total water inlet pipe is provided with a reagent dosing point, and the reagent dosing point includes a scale inhibitor dosing point and a reducing agent dosing point.

[0006] The front end water total pipe is connected to the upper part of the water outlet side of the reverse osmosis membrane group, and the rear end water total pipe is connected to the lower part of the water outlet side of the reverse osmosis membrane group.

[0007] The chemical cleaning water inlet pipe is provided with a drain pipe and a drain valve.

[0008] Compared with the prior art, the seawater desalination system reverse osmosis membrane integrated equipment has the advantages that the construction elevation of the reverse osmosis membrane water inlet pool is adopted, the pretreated seawater is allowed to flow into the reverse osmosis membrane group water inlet pipeline by gravity, the energy consumption for conveying seawater to the reverse osmosis membrane group is saved, the cost is reduced, the number of the parallel reverse osmosis membrane groups can be selected according to the actual seawater desalination scale, the seawater desalination system reverse osmosis membrane integrated equipment is complete and reliable, the investment cost is small, and the operation cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a schematic view of the overall connection structure of the utility model;

[0010] Main symbol explanation:

[0011] 1, reverse osmosis membrane water inlet pool; 2, reverse osmosis membrane group total water inlet pipe; 3, chemical cleaning water inlet pipe; 4, emptying valve; 5, drain pipe; 6, front end water total pipe; 7, rear end water total pipe; 8, chemical cleaning concentrated water return pipe; 9, reverse osmosis membrane group; 10, chemical cleaning circulation pipe; 11, reducing agent adding point; 12, scale inhibitor adding point. DETAILED DESCRIPTION

[0012] In the following, the utility model is further described in combination with the drawings and the specific implementation, and it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.

[0013] Embodiment:

[0014] Please combine Figure 1 The large seawater desalination system reverse osmosis membrane integrated equipment includes a reverse osmosis membrane water inlet pool 1 and a reverse osmosis membrane group 9, the reverse osmosis membrane water inlet pool 1 adopts a higher construction elevation, the reverse osmosis membrane water inlet pool 1 is connected with the water inlet port of the reverse osmosis membrane group total water inlet pipe 2 at the bottom, the water outlet port of the reverse osmosis membrane group total water inlet pipe 2 is connected with the water inlet side of the reverse osmosis membrane group 9, the reverse osmosis membrane group total water inlet pipe 2 is connected with the chemical cleaning water inlet pipe 3, the water outlet side of the reverse osmosis membrane group 9 is connected with the chemical cleaning water production return pipe and the chemical cleaning concentrated water return pipe 8, the chemical cleaning water production return pipe includes a front end water total pipe 6 and a rear end water total pipe 7, and the chemical cleaning concentrated water return pipe 8 and the rear end water total pipe 7 are connected with the chemical cleaning circulation pipe 10.

[0015] The reverse osmosis membrane group total water inlet pipe is provided with a reagent adding point, and the reagent adding point includes a scale inhibitor adding point 12 and a reducing agent adding point 11.

[0016] The front end water total pipe 6 is connected with the upper portion of the water outlet side of the reverse osmosis membrane group 9, and the rear end water total pipe 7 is connected with the lower portion of the water outlet side of the reverse osmosis membrane group 9.

[0017] The chemical cleaning water inlet pipe 3 is provided with a drain pipe 5 and a drain valve 4.

[0018] The pretreated seawater is respectively delivered to single reverse osmosis membrane groups, and the seawater is desalinated in the single reverse osmosis membrane groups, and the front-end produced water is concentrated to the front-end produced water main pipe 6 to enter a produced water pool, and the rear-end produced water is concentrated to the rear-end produced water main pipe 7 to enter the produced water pool or to be processed in the next step. According to the produced water quality requirement, a secondary or multi-stage reverse osmosis equipment can be connected after the reverse osmosis membrane integrated equipment rear-end produced water main pipe, so as to further improve the produced water quality.

[0019] The reverse osmosis membrane group water inlet pool 1 adopts a higher construction elevation, and the pretreated seawater can be self-flowed to the reverse osmosis equipment water inlet pipeline through the gravity, so that the energy consumption for delivering the seawater to the reverse osmosis membrane group is saved, and the construction and operation costs are saved.

[0020] The lowest point of the reverse osmosis membrane group water inlet pool needs to be higher than the reverse osmosis membrane group total water inlet pipe, and the highest point should not be lower than the reverse osmosis membrane group chemical cleaning produced water backflow pipe, so as to prevent the occurrence of the produced water side back pressure.

[0021] The medicament adding point is arranged on the reverse osmosis membrane group total water inlet pipe 2, the scale inhibitor adding point and the reducing agent adding point are arranged, the adding amount is continuously added according to the number of the membrane groups in the reverse osmosis membrane integrated equipment and the seawater quality after the pretreatment, so that the membrane element is prevented from being scaled and oxidized and damaged during the operation of the membrane group.

[0022] The drain pipe and the drain valve are arranged on the chemical cleaning water inlet pipe, when the reverse osmosis membrane group is chemically cleaned or the membrane element needs to be repaired, the liquid medicine or water in the membrane group can be drained through the drain pipe.

[0023] The embodiment Figure 1 The reverse osmosis integrated equipment shown in the embodiment has two reverse osmosis membrane groups, which are numbered as 1# and 2#, and more reverse osmosis membrane groups can be connected in parallel to the reverse osmosis integrated device according to the actual seawater desalination scale, so that the investment and operation cost is low, the function is complete and reliable, and the reverse osmosis integrated device is suitable for large-scale seawater desalination projects.

[0024] The above-mentioned embodiments are only preferred embodiments of the utility model, and cannot be used to limit the range of the utility model protection, and any non-substantial changes and replacements made by the person skilled in the art on the basis of the utility model all belong to the range of the utility model protection.

Claims

1. A large-scale seawater desalination system reverse osmosis membrane integrated device, characterized in that, The system includes a reverse osmosis membrane feed tank and a reverse osmosis membrane module. The reverse osmosis membrane feed tank is constructed at a relatively high elevation. The bottom of the reverse osmosis membrane feed tank is connected to the inlet port of the main inlet pipe of the reverse osmosis membrane module. The outlet port of the main inlet pipe of the reverse osmosis membrane module is connected to the inlet side of the reverse osmosis membrane module. The main inlet pipe of the reverse osmosis membrane module is connected to the chemical cleaning feed pipe. The outlet side of the reverse osmosis membrane module is connected to the chemical cleaning permeate return pipe and the chemical cleaning concentrate return pipe. The chemical cleaning permeate return pipe includes a front-end permeate main pipe and a rear-end permeate main pipe. The chemical cleaning concentrate return pipe and the rear-end permeate main pipe are connected to the chemical cleaning circulation pipe.

2. The large-scale seawater desalination system reverse osmosis membrane integrated equipment as described in claim 1, characterized in that, The main inlet pipe of the reverse osmosis membrane module is equipped with a chemical dosing point, which includes a scale inhibitor dosing point and a reducing agent dosing point.

3. The large-scale seawater desalination system reverse osmosis membrane integrated equipment as described in claim 1, characterized in that, The front-end permeate main pipe is connected to the upper part of the outlet side of the reverse osmosis membrane module, and the rear-end permeate main pipe is connected to the lower part of the outlet side of the reverse osmosis membrane module.

4. The large-scale seawater desalination system reverse osmosis membrane integrated equipment as described in claim 1, characterized in that, The chemical cleaning water inlet pipe is equipped with a drain pipe and a drain valve.

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