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System for removing total organic carbon for demineralization water system for nuclear power station and control method

A technology of total organic carbon and nuclear power plants, applied in the field of desalinated water treatment systems of nuclear power plants, can solve the problems of high removal rate, low removal rate, and difficulty in nuclear power plant construction, and achieve stable operation, extended service life, and stable removal rate Effect

Active Publication Date: 2014-08-20
STATE NUCLEAR ELECTRIC POWER PLANNING DESIGN & RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the TOC content in the water source is required to be maintained at 5ppm, which cannot be solved by the existing process due to the water source situation, and it is almost difficult to achieve it in the construction of nuclear power plants.
[0008] 2. The removal rate of TOC in the desalinated water treatment system is unstable
[0009] TOC is a comprehensive index, and its composition is very complex. Bacteria, microorganisms, biochemical oxygen demand (BOD), macromolecular organic matter, etc. all belong to TOC, and the removal rate of TOC with different compositions is different by using reverse osmosis + ion exchange desalination method Yes, if the proportion of macromolecular organic matter in TOC is high, the removal rate will be high; otherwise, the removal rate will be low and the TOC removal rate will be unstable, which will affect the stable operation of the thermal system of the nuclear power plant

Method used

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  • System for removing total organic carbon for demineralization water system for nuclear power station and control method

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Effect test

Embodiment 1

[0059] see figure 1 As shown, the embodiment of the present invention provides a system for removing total organic carbon in the desalinated water system of a nuclear power plant, which combines reverse osmosis (RO) and ultraviolet (hereinafter referred to as UV) disinfection to remove total organic carbon (TOC) system in nuclear power plant desalinated water , to form a gradient removal of TOC, that is, a large amount of TOC with a higher molecular weight is first removed by RO, and a small amount of TOC with a lower molecular weight is removed by UV to ensure that the system water quality TOC≤50ppb. The system at least includes: high-pressure pump 1, reverse osmosis device 2, ultraviolet disinfection equipment 3 and related pipelines, control valves, etc.; Branch B, concentrated water pipeline C, reverse osmosis working pipeline D, qualified product water outlet pipeline E, bypass of ultraviolet disinfection equipment F, unqualified product water discharge pipeline G of ultr...

Embodiment 2

[0068] Referring to Figure 2, an embodiment of the present invention provides a control method for removing total organic carbon in a desalinated water system of a nuclear power plant, including: 1) normal operating conditions, 2) system shutdown, 3) abnormal operating conditions, 4 ) Switching from normal operating conditions to abnormal operating conditions, 5) Unqualified product water discharge operating conditions, 6) Process steps under different operating conditions such as RO+UV operation control, among which

[0069] 1) Process steps under normal operating conditions

[0070] Open the automatic inlet valve V1 of the high-pressure pump, the water inlet valve V5 of the ultraviolet disinfection equipment, the outlet water valve V6 of the ultraviolet disinfection equipment, the automatic concentrated water discharge valve V9 of the reverse osmosis device, close the bypass valve V7 of the ultraviolet disinfection equipment, and the reverse osmosis device not Qualified prod...

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Abstract

The invention discloses a system for removing total organic carbon for a demineralization water system for a nuclear power station and a control method and belongs to the field of a demineralized water treatment system of the nuclear power station. The system at least comprises a high pressure pump, a reverse osmosis device, ultraviolet disinfection equipment, relevant pipelines and control valves, wherein a water outlet of the high pressure pump is connected with the reverse osmosis device by the water inflow pipeline of the demineralization water system, the reverse osmosis device is connected with the ultraviolet disinfection equipment by the reverse osmosis working pipeline. The control method comprises the steps of a normal operation condition, system down, an abnormal condition, switching from the normal operation condition to the abnormal condition, a disqualified water producing discharge condition and RO+UV (Reverse Osmosis+Ultraviolet) operation control. With the adoption of the system for removing the total organic carbon for the nuclear power station, which integrates reverse osmosis and ultraviolet disinfection, the TOC (Total Organic Carbon) of various water sources can be removed gradiently, the adaptability of the demineralized water treatment system to the water sources is improved, the TOC removal rate is stable, and the stable operation of a thermodynamic system of the nuclear power station can be maintained.

Description

technical field [0001] The invention relates to the field of desalinated water treatment systems of nuclear power plants, in particular to a system and a control method for removing total organic carbon in the desalinated water system of nuclear power plants. Background technique [0002] The function of the desalinated water system of the nuclear power plant is to treat the incoming water of the raw water pretreatment system, and remove the dissolved salt in the clean water after the raw water pretreatment through distillation, reverse osmosis, ion exchange or a combination of these methods to obtain the first-level desalinated water, and then the first-level desalinated water The desalted water is obtained through the mixed bed to meet the requirements of the unit. The content of organic substances in water is expressed by the amount of carbon, the main element in organic matter, and is called total organic carbon (hereinafter referred to as TOC). [0003] The AP1000 ment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08G21D1/02C02F1/44C02F1/32
CPCY02E30/40Y02A20/131Y02E30/00
Inventor 尹林林陶逢春徐秀萍李达然张受卫何俊朱伟
Owner STATE NUCLEAR ELECTRIC POWER PLANNING DESIGN & RES INST CO LTD