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A treatment method for oilfield sewage

A treatment method and technology for oilfield sewage, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult oil-water separation, high waste water content, complicated operation, etc., and achieve oil-water Short separation time, no secondary pollution, good demulsification performance

Active Publication Date: 2017-11-14
浙江融合环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: the waste water content of the heavy emulsified oil produced by heavy oil processing is high, it is difficult to be biodegraded, resulting in difficult separation of oil and water, while the commonly used flocculation sedimentation and air flotation methods still have long separation time and low efficiency , complex operation and poor demulsification performance, a tea oil bran is provided as a raw material, which is dried after being soaked in citric acid, ethyl acetate, hydrochloric acid and sodium hydroxide, and finally sprinkled into oily wastewater and stirred statically. The oilfield sewage treatment method that absorbs heavy emulsified oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] First, take 1kg of fresh tea oil seeds, wash and remove surface dirt, soak in water for 2 hours, then place them in a pineapple sieve, and expose them to the sun for 1 day, and turn them in the sun every 4 hours. Put the sun-dried tea oil seeds into a pot and stir-fry for 45 minutes, control the temperature at 55°C, so that the water content of the tea oil seeds is 5%; then put the above-mentioned fried tea oil seeds into a dryer for drying, Until the water content drops to 1%, put the dried camellia oil seeds into a steamer and cook at 70°C for 40 minutes. After steaming, take it out and cool it down to room temperature naturally, then put it into a twin-screw press for pressing, repeat Squeeze 2 times, press and discharge the oil to get tea oil bran; then dry the tea oil bran obtained above by microwave until the water is completely removed, then put it into a pulverizer for crushing, crush for 3 minutes, and sieve to get 80 mesh Granules, collected particles sealed a...

example 2

[0023]First, take 1.5kg of fresh tea oil seeds, wash and remove the surface dirt, soak in clean water for 2.5 hours, then put them in a pineapple sieve, and expose them to the sun for 1.5 days, and turn them every 4 hours to dry them. After completion, put the sun-dried tea oil seeds into a pot and stir-fry for 50 minutes, control the temperature at 60°C, so that the water content of the tea oil seeds is 7%; then put the above-mentioned fried tea oil seeds into a dryer for drying Process until the water content drops to 1.5%, then put the dried tea oil seeds into a steamer, and cook at 75°C for 45 minutes. After steaming, take it out and cool it down to room temperature naturally, and then put it into a twin-screw press for pressing , repeated pressing for 3 times, and the tea oil bran was obtained after the oil was discharged from the pressing; then the tea oil bran obtained above was dried by microwave until the water was completely removed, then it was put into a pulverizer ...

example 3

[0026] First, take 2kg of fresh tea oil seeds, wash and remove surface dirt, soak in water for 3 hours, then place them in a pineapple sieve, and expose them to the sun for 2 days, and turn them in the sun every 4 hours. Put the sun-dried tea oil seeds into a pot and stir-fry for 55 minutes, control the temperature at 65°C, so that the water content of the tea oil seeds is 8%; then put the above-mentioned fried tea oil seeds into a dryer for drying treatment, Until the water content drops to 2%, put the dried tea oil seeds into a steamer, and steam them at 80°C for 50 minutes. After steaming, take them out and cool them down to room temperature, then put them into a twin-screw press for pressing, repeat Squeeze 4 times, press and discharge the oil to get tea oil bran; then dry the tea oil bran obtained above by microwave until the water is completely removed, then put it into a pulverizer for crushing, crush for 5 minutes, and sieve to get 100 mesh Granules, collected particle...

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Abstract

The invention discloses a treatment method for oilfield wastewater and belongs to the technical field of wastewater treatment. According to the method, camellia oil bran is used as a raw material, dried after being soaked in citric acid, ethyl acetate, hydrochloric acid and sodium hydroxide and scattered into oil-containing wastewater finally, and the mixture is stirred and left to stand, so that heavy emulsified oil in the oilfield wastewater is adsorbed. Examples prove that the method is unique, novel and simple and easy to operate, the demulsification performance is good, oil-water separation time is short, no chemical agents are added, the cost is reduced, no pollution is caused to the environment, the concentration of oil in the oil-containing wastewater is measured to be decreased from 8,000-12,000 ppm to 200-400 ppm finally, and the removal rate is higher than 95%.

Description

technical field [0001] The invention discloses a treatment method for oilfield sewage, which belongs to the technical field of sewage treatment. Background technique [0002] Oilfield sewage is mainly composed of oilfield produced water, drilling sewage and other types of oily sewage in the station. The heavy oil processing process will produce a large amount of wastewater containing heavy emulsified oil, including dehydration at the bottom of crude oil tanks, desalination and decalcification sewage, coking steam blowing Condensed water, etc. Compared with ordinary oil refining wastewater, this kind of water has the following outstanding features: (1) High content of emulsified oil: under normal circumstances, more than half of the oil in heavy crude oil processing wastewater exists in the form of emulsified oil. After dispersing oil, more than 80% of COD is produced by emulsified oil and colloidal suspension; (2) The degree of emulsification is severe, and the emulsion drop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/40B01J20/24B01J20/30C02F103/10C02F101/32
CPCB01J20/24C02F1/286C02F1/288C02F1/40C02F2101/32C02F2103/10
Inventor 高大元张帆
Owner 浙江融合环境科技有限公司