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Method for reclamation and utilization of oil refining sewage

A technology for oil refinery sewage and filter materials, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as difficult removal of ammonia nitrogen

Inactive Publication Date: 2004-06-16
BEIJING YANSHAN PETROCHEM IND CHINA PETROCHEM GROUP
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  • Abstract
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Problems solved by technology

Its shortcoming is that it is difficult to remove ammonia nitrogen with the technology of this invention

Method used

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  • Method for reclamation and utilization of oil refining sewage
  • Method for reclamation and utilization of oil refining sewage

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Experimental program
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Effect test

Embodiment

[0032] The process shown in the attached figure is used to treat the refinery sewage after secondary biochemical treatment, and the control conditions are as follows:

[0033] Biological aerated filter: the filter material is volcanic rock with a particle size of 3-10mm, the inflow of sewage is 10 tons / hour, and the ammonia nitrogen load of the filter is 0.08-0.10kg / (m 3 .d), dissolved oxygen 3-5mg / L, aeration intensity 0.16N m 3 / m 2 .min.

[0034] Coagulation tank: add coagulant and coagulant aid, the coagulant is polyaluminum chloride, the dosage is 15mg / L, the coagulant aid is cationic polyacrylamide, the dosage is 1mg / L, water is in the mixing tank The residence time of the coagulation pool is 30min.

[0035] Sedimentation tank: surface load is 0.80m3 / m 2 .h, the residence time is 3.5h.

[0036] The residence time of the chlorine addition and oxidation tank is 60 minutes, and the dosage of chlorine is determined according to the concentration of ammonia nitrogen in ...

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Abstract

The invention relates to a process for reclamation and utilization of oil refining sewage, wherein the the oil refining sewage water is processed in the following steps after second level biological chemical treatment, sending the sewage into aeration biological filter for treatment and then transferring it into coagulation basin, filling coagulating agent and coagulant aid to accelerate the agglomeration of the colloid particles, seding into sedimentation basin for deposition and segregation, adding chlorine to the deposited and segregated water for removing ammonia nitrogen, then performing fiber filter filtration, ozonization, activated charcoal filter filtration, and sterilization by chlorine before being sent into industrial pipe network or as the supply water for circulated water to be sent into circulating water system.

Description

technical field [0001] The invention relates to a method for recycling oil refining sewage, in particular to a method for recycling oil refining sewage after secondary biochemical treatment. Background technique [0002] Calculated on a per capita basis, my country's fresh water resources are very scarce. Moreover, there are problems such as uneven temporal and spatial distribution, increased water pollution, and accelerated economic development, which have exacerbated the water shortage problem in some areas. Some areas have also introduced policies to limit the amount of fresh water used by large enterprises, causing some enterprises to have to consider Sewage recycling. Refinery sewage is rich in ammonia nitrogen. To recycle it for industrial water, it is generally necessary to remove ammonia nitrogen, because a large amount of ammonia nitrogen is easy to corrode equipment and cause the growth of microorganisms. [0003] Chinese patent application CN1232793A discloses o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F9/14
Inventor 徐传海郦和生胡惊雷刘玉璋赵西明任志峰周银发
Owner BEIJING YANSHAN PETROCHEM IND CHINA PETROCHEM GROUP
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