Anti-blocking desalting device and method

A desalination device and anti-clogging technology, applied in chemical instruments and methods, multi-stage water/sewage treatment, neutralized water/sewage treatment, etc. The effect of blocking, efficient desalination, and raising the reaction temperature

Pending Publication Date: 2021-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the device and method of the present invention are used for desalination of high-salt wastewater, they can meet the needs of long-term stable operation, can realize efficient removal of salt in wastewater, and solve the problems of difficult desalination and easy blockage of high-salt wastewater

Method used

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  • Anti-blocking desalting device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Adopt the present invention to attach figure 1 The desalination device shown is the same as that in Embodiment 1. In the high-salt organic wastewater, the COD concentration is 92600mg / L, the TDS is 13.5wt%, and the pH is 8.5.

[0036] Pass high-salt organic wastewater (at normal temperature and pressure at 30MPa) and oxygen (at normal temperature and at pressure at 30MPa) into the desalination device, in which the solid particles in the desalination device are alumina ceramic balls with a diameter of 0.4mm. Density 0.65g / cm 3 , the specific surface area is 260m 2 / g, the amount of solid particles added is 1 / 2 of the volume of the device. The amount of oxygen introduced is 300% of the theoretical oxygen demand for wastewater oxidation. The operating temperature of the inner chamber of the device is 600° C., the pressure is 28 MPa, and the residence time is 30 seconds. The amount of solid particles added and discharged is 75g•h -1 • L -1 Ingress of water. After tr...

Embodiment 2

[0038] Same as Example 1, the difference is that the solid particles are made of silica pellets with a diameter of 0.5mm and a specific surface area of ​​230m 2 / g. After treatment, the COD concentration in the effluent water is 53mg / L, and the TDS is 62mg / L. After 100 days of continuous operation, neither the device nor the pipeline was blocked.

Embodiment 3

[0040] The same as in Example 1, the difference is that sodium hydroxide is added to the high-salt wastewater fed, and the pH of the feed water is controlled to be 11. After treatment, the COD and TDS in the effluent did not change much. However, the pH value of the influent is controlled to be alkaline, and the alkaline substances in the wastewater can neutralize the acidic substances generated during the desalination process, thereby avoiding corrosion of the device. After 100 days of continuous operation, neither the device nor the pipeline was blocked.

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Abstract

The invention relates to an anti-blocking desalting device and method. The device mainly comprises a device shell and a device internal component, the internal component comprises a guide structure on the inner side of the device, a hollow cylinder concentric with the device shell and an umbrella cap located on the upper portion of the hollow cylinder, a buffer area and a gas distributor are arranged at the bottom of the device, and an inner cylinder is arranged in the buffer area; and liquid distributors are arranged at the bottom ends of the two sides of the shell, and waste water symmetrically enters a ring system between the buffer area inner cylinder and the shell. When the device and the method are particularly used for desalting high-salinity wastewater, the requirement of long-period stable operation can be met, salt in the wastewater can be efficiently removed, and the problems of difficulty in desalting the high-salinity wastewater, easiness in blockage and the like are solved.

Description

technical field [0001] The invention belongs to the field of high-salt wastewater desalination, and in particular relates to an anti-clogging desalination device and a desalination method. Background technique [0002] High-salt wastewater refers to wastewater with a total salt content of at least 1%. Some industrial industries, such as oil extraction, printing and dyeing, papermaking, pharmaceutical and chemical industries, have a salt content of about 15%-25%. If organic heavy metals and radioactive substances are discharged directly without treatment, they will inevitably cause great harm to aquatic organisms, drinking water, and industrial and agricultural production water. [0003] At present, the research on high-salt wastewater at home and abroad mainly includes biological methods and physical and chemical methods. The biological method shows a high organic matter removal rate in the treatment of high-salt wastewater, but the high concentration of salt substances ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F9/04
CPCC02F1/72C02F1/66
Inventor 周彤郭宏山赵磊蒋广安邓德刚秦丽姣
Owner CHINA PETROLEUM & CHEM CORP
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