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Boiler make-up water deep desalination treatment system and method

A treatment system and water supply technology, applied in the field of water treatment, to achieve the effects of strong water quality adaptability, simple equipment operation and maintenance, and reduced plant height

Pending Publication Date: 2020-10-13
国能朗新明环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above problems, the present invention discloses a deep desalination treatment system and method for boiler feed water. Since the treatment system does not require ion exchange membranes, the problems of membrane fouling and membrane scaling are avoided, and the device structure is simple and easy to operate. , lower investment cost and other advantages

Method used

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Embodiment 1

[0039] Such as Figure 5 As shown, a deep desalination treatment system for boiler feed water includes a raw water tank, a pretreatment module, a membrane separation module, a NEDI module, and a water outlet tank.

[0040] The raw water tank, pretreatment module, membrane separation module, NEDI module, and water outlet tank are connected in sequence; the NEDI module includes a first-level NEDI module and a second-level NEDI module; the first-level NEDI module and the second-level NEDI module have the same structure and are set in parallel; the first level The NEDI module includes a pair of negative and positive electrodes and a mixed resin between the electrodes; the secondary NEDI module includes a pair of negative and positive electrodes and a mixed resin between the electrodes.

[0041] Among them, the first-level NEDI module and the second-level NEDI module include three groups, and each group of NEDI modules is set in parallel.

[0042] Among them, the membrane separati...

Embodiment approach

[0055] The specific implementation is as follows:

[0056]The following is a performance comparison of the three deep desalination technologies of mixed bed, EDI and NEDI, as shown in Table 1. It can be seen from the table that compared with the traditional mixed bed, NEDI technology is more environmentally friendly and has a higher degree of automation; compared with EDI technology, NEDI has more advantages in terms of investment cost and maintenance cost, and there is no waste water discharge. requirements, NEDI has better adaptability. EDI feedwater generally requires secondary RO produced water, which greatly limits the application and promotion of this technology in power plants, while NEDI can work normally under the condition of primary RO produced water, greatly reducing investment and operating costs. In summary, the technical route adopted in this project is reasonable.

[0057] Table 1 Technical Performance Comparison of Mixed Bed, EDI and NEDI

[0058]

[005...

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Abstract

The invention discloses a boiler make-up water deep desalination treatment system, which comprises a raw water tank, a pretreatment module, a membrane separation module, an NEDI module and a water outlet tank, and the raw water tank, the pretreatment module, the membrane separation module, the NEDI module and the water outlet tank are connected in sequence; the NEDI module comprises a first-stageNEDI module and a second-stage NEDI module; the first-stage NEDI module and the second-stage NEDI module have the same structure and are arranged in parallel; and the primary NEDI module comprises a pair of negative and positive electrodes and mixed resin between the electrodes. The invention further discloses a treatment method of the system. The treatment system does not need an ion exchange membrane, so that the problems of membrane pollution and membrane scaling are avoided, and the treatment system has the advantages of simple device structure, convenience in operation, lower investment cost and the like.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a deep desalination treatment system and method for boiler feed water. Background technique [0002] In the early days, the deep desalination of boiler feed water systems in power plants at home and abroad mainly adopted the "yin-yang bed + mixed bed" mode. It has gradually been popularized and applied in power plants. The application of membrane treatment technology has greatly reduced the operating load of ion exchange resins, and the regeneration cycle has been extended. At the same time, a deep desalination technology (EDI) that can replace the mixed bed is developing rapidly, and the full-membrane process composed of it and RO reverse osmosis unit has attracted widespread attention. The research and application of traditional ion exchange technology and electrodeionization technology (EDI) technology are as follows. [0003] ①Ion exchange technology [0004] Both ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12
CPCC02F9/00C02F1/444C02F2001/007C02F1/441C02F1/42C02F1/4695C02F2103/02C02F2303/14
Inventor 顾小红陈旭王我王飞徐峰张欣许敏
Owner 国能朗新明环保科技有限公司
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