Oil refining reclaimed water reuse high-concentration-ratio circulating water treatment method and device

A technology of reclaimed water and circulating water, which is applied in water/sewage treatment, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc. It can solve the requirement of high water quality stability and the concentration ratio should not be too high. , equipment corrosion and other problems, to achieve the effect of improving sewage reuse rate, reducing energy consumption cost and reducing pollution

Inactive Publication Date: 2015-11-04
CNOOC TIANJIN CHEM RES & DESIGN INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the traditional chemical treatment method is effective, there are obvious disadvantages: first, the requirements for water quality stability are high, and different chemical formulations are highly targeted. Formula; second, the concentration ratio of the circulation system should not be too high. The increase of the concentration ratio will cause corrosion and scaling of the equipment. The system needs to maintain a certain concentration ratio through forced drainage or adding chemicals to achieve the purpose of water quality stability. The general concentration ratio is 2-4 times

Method used

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  • Oil refining reclaimed water reuse high-concentration-ratio circulating water treatment method and device
  • Oil refining reclaimed water reuse high-concentration-ratio circulating water treatment method and device
  • Oil refining reclaimed water reuse high-concentration-ratio circulating water treatment method and device

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specific Embodiment approach

[0028] The present invention will be further described in conjunction with the accompanying drawings. see figure 1 , the present invention provides a kind of reclaimed oil refinery water reuse high concentration ratio circulating water treatment method and equipment, the specific implementation is as follows:

[0029] (1) Below the cooling tower 1 is the cold water pool 2, and there is a replenishment pipeline on the upper part of the cold water pool 2 to inject the circulating system replenishment water into the pool, and use the waste water from the refinery after secondary treatment to reach the standard as the raw water of the regenerated water, and achieve circular cooling after advanced treatment The regenerated water of the reclaimed water quality standard for water is injected into the cold water pool 2 through the regenerated water replenishment pipeline 3, and its water volume accounts for 10%-100% of the replenishment water volume of the circulating cooling system, ...

Embodiment 2

[0035] A petrochemical company in Ningbo City, Zhejiang Province mainly refines marine heavy crude oil with the characteristics of high density and high acid value. The discharged sewage after secondary biochemical treatment is further treated by ultrafiltration-reverse osmosis double membrane system, and the regenerated water is ultrafiltration The effluent and reverse osmosis effluent are mixed. The enterprise 3000m 3 The / h circulating water system mainly uses reclaimed water and fresh water as the supplementary water of the circulating system, of which the regenerated water accounts for 33% of the total supplementary water, and its water quality is shown in Table 1.

[0036] project

unit

recycled water

fresh water

pH

6.5-8.8

7.7-7.8

conductance

μS / cm

<500

120-150

total alkalinity

CaCO 3 Count, mg / L

50-350

20-30

Cl -

mg / L

<100

10-20

always hard

CaCO 3 Count, mg / ...

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Abstract

The invention relates to an oil refining reclaimed water reuse high-concentration-ratio circulating water treatment method and device. The method and device are characterized in that electrochemical water treatment complete equipment is connected to a water return main pipeline of a circulating cooling system in parallel for water quality treatment of circulating water, wherein reclaimed water obtained after deeply processing oil refining waste water serves as supplemented water. The electrochemical water treatment complete equipment carries out circulating taking and using treatment on the circulating water through circulating water return residual pressure. Softening and sterilization of water quality of the circulating system are achieved in an electrolysis mode, and the concentration ratio of the circulating water is effectively increased. The method can increase the sewage recycle rate of refining enterprises, consumption of fresh water is reduced, pollution of drained water to the environment is reduced, and meanwhile the method and the device have the advantages of being low in energy consumption, low in cost, environmentally friendly, free of pollution and high in automation degree.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method and equipment for recycling recycled water with a high concentration ratio for reclaimed oil refining water. Background technique [0002] After proper treatment, the quality of sewage is changed or other measures are taken to make it meet certain requirements for reuse, referred to as reclaimed water. Reclaimed water is divided into primary recycled water and high-quality recycled water. Primary reclaimed water refers to the reclaimed water suitable for landscaping, irrigation, cleaning, toilet flushing, recirculating cooling water replenishment, etc. after proper treatment of sewage. High-quality reclaimed water refers to the regenerated water that can replace the original fresh water that enters the ion exchanger after treatment, and can improve the operation effect of the ion exchanger, or directly meet the water quality standard for boiler make-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/50
Inventor 滕厚开陶蕾贺胜如秦立娟王仕文朱旭东王昊王宁石硕年王超
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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