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Low-consumption catalytic separation wastewater treatment method

A technology for wastewater treatment and low consumption, which is applied in water/sewage treatment, natural water treatment, water treatment parameter control, etc. The effect of improving dissolved gas characteristics

Active Publication Date: 2020-07-17
北京市惠全成环境治理工程有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the high-concentration refinery wastewater treatment processes at home and abroad are oil separation, secondary air flotation, biochemical pool and filtration. Although this process can meet the needs of discharge standards, this type of process uses a lot of chemicals and consumes a lot of energy.

Method used

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  • Low-consumption catalytic separation wastewater treatment method
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) will contain COD cr 1200mg / L, BOD 5 50mg / L, 350mg / L SS, 100mg / L oil content, 150mg / L volatile phenol, 50mg / L total phosphorus, and 100mg / L total nitrogen pass through the grid well, and then the wastewater Discharge into the grease trap, separate the suspended solids in the wastewater and discharge the suspended solids.

[0035] (2) The active energy generating device is activated by an electric field to generate OH - Active gas such as free radicals, the active gas containing free radicals is dissolved in water at 0.25MPa through the dissolved air system to produce active dissolved air water.

[0036] (3) Add 0.5mg / L AP demulsifier to the wastewater for demulsification treatment, and add 0.2mg / L diatomite flocculant for sedimentation treatment.

[0037] (4) Send the wastewater separated from the suspended matter into the air flotation tank, and the dissolved air water (accounting for 20% of the volume of the wastewater) is evenly released into the air flotation ...

Embodiment 2

[0045] (1) will contain COD cr 800mg / L, BOD 5 Wastewater with a concentration of 100mg / L, SS of 300mg / L, oil content of 20mg / L, total phosphorus of 4mg / L, and total nitrogen of 300mg / L passes through the grid well, and then discharges the waste water into the grease trap to separate the waste water suspended matter and discharge the suspended matter.

[0046] (2) The active energy generating device is activated by an electric field to generate OH - Active gas such as free radicals, the active gas containing free radicals is dissolved in water through the dissolved air system at 0.3MPa to produce active dissolved air water.

[0047] (3) Send the wastewater separated from the suspended matter into the air flotation tank, and the dissolved air water (accounting for 20% of the volume of the wastewater) is evenly released into the air flotation tank through the dissolved air releaser evenly arranged at the bottom of the air flotation tank, and the release pressure is 0.3MPa , th...

Embodiment 3

[0054] (1) will contain COD cr 2500mg / L, BOD 5 The wastewater is 450mg / L, SS is 50mg / L, oil content is 20mg / L, total phosphorus is 15mg / L, and total nitrogen is 100mg / L. The wastewater passes through the grid well, and then the wastewater is discharged into the grease trap to separate the wastewater Suspended matter in and discharged.

[0055] (2) The active energy generating device is activated by an electric field to generate OH - The active gas containing free radicals is dissolved in water through the dissolved air system at 0.33MPa to produce active dissolved air water.

[0056] (3) Add 2 mg / LAP type demulsifier to the wastewater for demulsification treatment, and add 3 mg / L polyaluminum chloride flocculant for sedimentation treatment.

[0057] (4) Send the wastewater separated from the suspended matter into the air flotation tank, and the dissolved air water (accounting for 15% of the volume of the wastewater) is evenly released into the air flotation tank through the...

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Abstract

The invention discloses a low-consumption catalytic separation wastewater treatment method which comprises the following steps: 1) enabling wastewater to pass through a grating well and an oil separation tank, and separating suspended matters; 2) dissolving active gas in water to generate gas-dissolved water; 3) performing demulsification treatment; 4) performing settling treatment; (5) introducing dissolved air water into the air floatation tank, and releasing fine bubbles to enter the wastewater, so as to realize primary separation of the wastewater; 6) carrying out biodegradation; 7) decomposing in an ozone tank to obtain oxygenolysis water; 8) performing oxidation treatment; 9) performing demulsification treatment; 10) filtering the wastewater obtained by sedimentation treatment through a filtering device, and discharging the filtered wastewater into a collecting tank; according to the method, gas activated by an electric field is used as a gas source, dissolved gas water is generated and released into sewage, fine bubbles are generated, the demulsification effect is achieved, the net capturing effect is good, colloid instability is promoted, agent consumption is reduced, the purpose of enhancing separation of emulsified substances, suspended solids and water is achieved, the sludge yield is reduced, and the agent content in sludge is reduced.

Description

technical field [0001] The invention relates to a low-consumption catalytic separation waste water treatment method, which is used for treating waste water, especially emulsified oil refinery waste water. Background technique [0002] Wastewater treatment is the use of physical, chemical and biological methods to treat wastewater, purify wastewater, reduce pollution, and achieve wastewater recovery and reuse, making full use of water resources. [0003] Refining unit waste water mainly comes from steam stripping and purification, electric desalination, refining alkali residue, waste amine liquid, tank farm drainage and circulating water drainage, etc. At present, most of the processes for treating high-concentration refinery wastewater at home and abroad are oil separation, secondary air flotation, biochemical tanks, and filtration. Although this process can meet the needs of discharge standards, this type of process uses a lot of chemicals and consumes a lot of energy. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/32C02F103/36
CPCC02F9/00C02F2209/08C02F2209/10C02F1/001C02F1/40C02F1/5236C02F2001/007C02F2101/32C02F2209/16C02F2209/18C02F1/465C02F2103/365Y02W10/10
Inventor 杨政宏
Owner 北京市惠全成环境治理工程有限责任公司
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