Integrating technology of water supplying and saving and sewage reusing technology system in petroleum and petrochemical industry

Abstract

The invention discloses an integrating technology of a water supplying and saving and sewage reusing system in the petroleum and petrochemical industry, comprising a scientific water supplying and course water saving system, a sewage treating and reusing system and a circularly regulating system. Impurities in sewage are removed after the sewage passes by a grid and particulate matters and oil slick are separated by adding deoiling agent; floating slag, emulsible oil and suspended substances are removed by adding special coagulant during dissolved air floatation; water passes through an anaerobic biochemical system, a fluidized bed biochemical system and a blast aeration system and is added with bio-energizer, and after vortex-vortex air flotation, organic matters and heavy metal in the water are removed and the water is dephosphorized and denitrogenated; the water passes by a secondary sedimentation tank, a filter tank, an intermediate transit pool, a biological filter, a middle-high pressure dissolved air floatation and a biological carbon tower and is filtered, and feculence and colloid are removed; disinfectant is added into the water before the water is filtered so as to control the propagation and the pollution and block of microorganisms; scruff and mud are condensed by dehydrating agent and are dried and recycled; the water is desalted by a reverse osmosis apparatus and is added with special agents for antisludging, sterilizing and cleaning; antisludging agent, inhibitor and sterilizing agent are added by an intelligent monitoring system, the weight concentration of water reach 5.0 to 6.0, and all the water can be recycled. The invention has skilled process and strong operability, treats 800,000 tons of sewage, saves 600,000 tons of fresh water and increases the benefits by RMB760,000 yuan.

Description

technical field [0001] The invention relates to petrochemical sewage disposal and water resources comprehensive utilization technology, especially the disposal of sewage water reuse system, and is especially suitable for the integration technology of petroleum petrochemical water supply and water saving sewage water reuse system. Background technique [0002] Petrochemical enterprises consume large amounts of water, discharge large amounts of sewage, and pollute the environment; the cost of sewage purification is high, which increases the burden on enterprises; increasing the concentration ratio of circulating cooling water and reducing the amount of fresh water taken are all problems and key points in the industry. In 2002, the total discharge of wastewater reached 3.37 billion tons, accounting for 17.8% of the total discharge of industrial wastewater in the country. Although some achievements have been made in water saving and emission reduction, the annual sewage discharg...

AI Technical Summary

Problems solved by technology

Although some achievements have been made in water saving and emission reduction, the annual sewage discharge of my country's petrochemical industry is still more than 800 million tons, and the current sewage reuse rate is only 30%.

[0003] Similar research results have been found on petrochemical wastewater treatment and recycling. For example, Dai Xiulan and others have a certain ability to resist impact loads on petrochemical wastewater, but the secondary treatment does not operate or has no treatment effect. It is difficult to ensure that the treated water quality meets the standard only through micro-electrolysis. ; Ji Xuan, Yao Chunshen and others studied and concluded that under the three conditions of high, medium and low turbidity in the effluent of the secondary sedimentation tank, the system's removal law of turbidity and COD and the change law of parameters such as filtration cycle, water head loss and flocculant dosage; Zhang Dongshu, Gao Tingyao and others researched and analyzed the removal of COD by coagulation and sedimentation, and compared the treatment effects of quicksand filtration and fiber bundle filtration; Li Hangyu, Zhang Ying and others studied the double-membrane treatment with ultrafiltration membrane + reverse osmosis The pilot test of pretreated petrochemical wastewater recycling; Li Shanren, Gao Tingyao and others studied the use of suspended filler biofilm method, coagulation sedimentation, rapid sand filtration and low-voltage electric field sterilization technology, and obtained good test results; Liu Jifeng research introduced the treatment methods such as flocculation oxide membrane separation after the secondary biochemical treatment of petrochemical wastewater; Focus on the intensive processing of a single functional unit or research on some functional units, lack of systematic research

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