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Coking emptying tower oily wastewater treatment device and method

A wastewater treatment and venting tower technology, applied in water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problems of limited treatment effect, long treatment time, inconvenient maintenance, etc., and achieve good economic benefits And social benefits, convenient operation, reasonable design effect

Inactive Publication Date: 2018-12-25
SINOPEC LUOYANG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gravity separation method is suitable for the collection of slick oil and dispersed oil. It has large processing capacity, stable effect, low operating cost and convenient management, but it occupies a large area and the processing effect is limited; the filtration method has a good treatment effect on dispersed oil and emulsified oil. The equipment investment is small, the effluent water quality is good, but the requirements for backwashing are high; the air flotation method has better treatment effect, mature technology, large floor space, large dose of medicine, and easy to generate scum; the biochemical method is environmentally friendly and easy, but the treatment time Long, slow effect; cyclone oil-water separation technology overcomes the shortcomings of the traditional gravity separation method, has the advantages of high separation efficiency, compact device, simple operation, etc. The disadvantages are complex structure and inconvenient maintenance, easy to block the entrance, high oil content in sewage, High degree of emulsification, easy to produce waste residue and secondary pollution
[0005] For the treatment of oily wastewater in the coking vent tower, although the above methods have certain treatment effects, they are difficult to meet the economic and technical requirements of deep purification treatment
In view of the large amount of dispersed oil, emulsified oil and dissolved oil contained in the coking vent water, it is difficult to reduce the oil content in the water to a lower level by conventional methods. In addition, from the perspective of environmental protection and effective utilization of resources, valuable oil products can be recovered , reduce the oil content of wastewater, and realize the recycling of wastewater, it is necessary to solve the problem by researching and developing new technology and equipment, so as to develop a technology for recovering oil from oily wastewater in coking vent towers, which has very broad application prospects

Method used

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  • Coking emptying tower oily wastewater treatment device and method
  • Coking emptying tower oily wastewater treatment device and method
  • Coking emptying tower oily wastewater treatment device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] The oily waste water from the coking blowdown tower of Refinery 1# is yellow in appearance and has a pungent odor. The pH value is 6.0-6.5. It is acidic organic waste water containing phenols, polycyclic aromatic compounds and heterocycles containing nitrogen, oxygen and sulfur. Organic compounds, etc., have serious emulsification, and the oil content seriously exceeds the standard, and the oil content is 8000-10000mg / L.

[0117] After the raw water is first purified by the coalescer 3, the water content of the recovered oil is 0.3%, and the oil content in the water is reduced to 980mg / L; after being treated by the membrane separator 4, the water content of the recovered oil is 0.3%, and the oil content in the water reduced to 200mg / L; finally after micro-electrolysis treatment, after flocculation and sedimentation in the settling tank 6, the oil content in the wastewater is lower than 5mg / L, and the oil content in the purified wastewater meets the requirements of the pe...

Embodiment 2

[0119] The oily waste water from the coking blowdown tower of refinery 2# is dark green in appearance, has a pungent smell, and has a pH value of 7.5 to 8.0. 9000mg / L.

[0120] After the raw water is first purified by the coalescer 3, the water content of the recovered oil is 0.3%, and the oil content in the water is reduced to 900mg / L; after being treated by the membrane separator 4, the water content of the recovered oil is 0.3%, and the oil content in the water Reduced to 150mg / L; finally after micro-electrolysis treatment, after flocculation and sedimentation in the settling tank 6, the oil content in the wastewater is lower than 3mg / L, and the oil content in the purified wastewater meets the requirements of the petroleum refining industry discharge standard [GB31570-2015] The technical requirements have solved the problem of oily wastewater treatment in the coking vent tower, and realized the deep purification treatment of oily wastewater. During the operation of the dev...

Embodiment 3

[0122] The oily wastewater from the coking blowdown tower of Refinery 3# is yellow in appearance, with a pH value of 5.5-6.5, which is acidic organic wastewater containing phenols, polycyclic aromatic compounds, etc., and its oil content is 6000-8000mg / L.

[0123] After the raw water is first purified by the coalescer 3, the water content of the recovered oil is 0.3%, and the oil content in the water is reduced to 800mg / L; after being treated by the membrane separator 4, the water content of the recovered oil is 0.3%, and the oil content in the water Reduced to 120mg / L; finally after micro-electrolysis treatment, after flocculation and sedimentation in the settling tank 6, the oil content in the wastewater is lower than 3mg / L, and the oil content in the purified wastewater meets the requirements of the petroleum refining industry discharge standard [GB31570-2015] The technical requirements have solved the problem of oily wastewater treatment in the coking vent tower, and realiz...

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Abstract

The invention relates to the technical field of oily wastewater purification treatment and recycling comprehensive utilization and provides a coking emptying tower oily wastewater treatment device andmethod. The device comprises a raw water storage tank, a coalescer, a membrane separator, a microelectrolysis reactor and a settling tank. The raw water storage tank is used for storage of coking emptying tower oily wastewater, and the wastewater sequentially passes through the coalescer, the membrane separator and the microelectrolysis reactor to finally flow into the settling tank through a rawwater pump; solid-liquid separation is performed in the settling tank to obtain water according with discharging conditions. By the coking emptying tower oily wastewater treatment device and method,oily wastewater purification treatment and complete collection of recycled oil can be realized; the coking emptying tower oily wastewater subjected to fine deoiling can be recycling as coke cooling water and can also be used after acid steam stripping or discharged into a sewage farm; quality of collected dirty oil is further improved through subsequent treatment to meet the requirement of directrecycling.

Description

technical field [0001] The invention relates to the technical field of purification treatment technology and resource comprehensive utilization of oily wastewater, in particular to a coking vent tower oily wastewater treatment device and method. Background technique [0002] Oily wastewater from coking blowdown towers mainly refers to blowing condensate water and small water supply cooling coke water, which is rich in various highly volatile odorous gases. This kind of wastewater is one of the most difficult coking oily wastewater in refineries. The delayed coking unit is the main processing unit for improving the yield of light oil and producing petroleum coke in the refinery, and it is also one of the main units for the deep processing of residual oil and heavy oil. District cold slag and asphalt slag, etc. After the coke is finished, a large amount of superheated steam will be used to blow off the oil, sulfide, organic matter, etc. on the surface of the coke, and the tem...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F1/40C02F1/44C02F1/46176C02F1/5281C02F9/00C02F2001/007C02F2303/14
Inventor 唐应彪崔新安李春贤李朝法蒋兴家
Owner SINOPEC LUOYANG TECH CO LTD
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