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Process for pretreating refining and coal chemical oily sewage

A technology for oily sewage and coal chemical industry, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effect of good water quality precipitation, thorough sludge discharge and investment saving.

Active Publication Date: 2012-11-07
BEIJING OTC ENERGY & ENVIRONMENT ENGINEERING PUBLIC LIMITED COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve a series of problems existing in the existing oily sewage pretreatment process, and propose a kind of pretreatment process suitable for refining and coal chemical oily sewage

Method used

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  • Process for pretreating refining and coal chemical oily sewage
  • Process for pretreating refining and coal chemical oily sewage
  • Process for pretreating refining and coal chemical oily sewage

Examples

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Effect test

Embodiment 1

[0036] A pre-treatment process for oily wastewater from refinery and coal chemical industry: the oily wastewater first enters the grid grit chamber to remove larger debris and sand; Slick oil collection, homogenization, and sedimentation are carried out in the multi-functional regulating tank; the water from the multi-functional regulating tank enters the second water collection well, and is lifted into the suspended sludge filter tank by the secondary lifting pump; in the suspended sludge filter tank The oil and suspended solids in the sewage are removed to provide good influent water quality for subsequent biological treatment.

Embodiment 2

[0038] A multi-functional regulating tank, comprising a tank body 12, the tank body 12 is provided with a water inlet device 7 and a water outlet device 3, and the water inlet device 7 is connected to the inside of the tank body 12 through a multi-section conduit and a non-leakage movable joint 5. The annular floating water distribution pipe 13 is connected to each other. The annular floating water distribution pipe 13 has water outlet holes 14 at fixed intervals. The water outlet holes 14 are water distribution holes or water spray nozzles. The movable collar 4 is slidably arranged in the slide rail 15 fixed on the inner wall of the tank body. The upper end of the slide rail 15 is provided with the highest water level baffle plate 11, and the lower end is provided with the lowest water level baffle plate 16. The slide rail 15 passes through the fixing piece It is arranged on the inner wall of the tank body 12. The fixing member and the water level baffles 11 and 16 are integra...

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Abstract

The invention relates to a process for pretreating refining and coal chemical oily sewage. According to the process, the refining and coal chemical oily sewage is pretreated by combining oily sewage buffer adjustment and suspended sludge filtering methods. The conventional adjustment tank, multi-stage oil separation and multi-stage air floatation pretreatment processes can be replaced. The process is applied before biological treatment in refining sewage treatment and coal chemical sewage treatment, and has the advantages of adjusting the amount and quality of the sewage, collecting and precipitating floating oil, discharging sludge, and removing suspended matters, emulsified oil and part of dissolved oil from the sewage for deep purification.

Description

technical field [0001] The invention relates to the technical field of pretreatment of oily sewage, in particular to a pretreatment process for oily sewage produced in the production process of refinery and coal chemical industries, which provides good influent water quality for subsequent treatment. Background technique [0002] The water quality and quantity of oily sewage treatment plants in the refining and coal chemical industries vary greatly, and the impact resistance of subsequent processes is weak. Only under stable water quality and quantity conditions can normal benefits be exerted, especially if the depth of oil removal in sewage is not enough for pretreatment. It has a greater impact on the effectiveness of subsequent biological treatment, which is also an important reason why some existing sewage treatment cannot meet the standards. In addition, the quality standards of external wastewater are becoming increasingly stringent, and the requirements for reuse and ...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F9/04
Inventor 张余凯姜学文邬扬善
Owner BEIJING OTC ENERGY & ENVIRONMENT ENGINEERING PUBLIC LIMITED COMPANY
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