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Oilfield wastewater treatment technology

An oilfield wastewater and treatment process technology, applied in the field of water treatment, can solve problems such as unsatisfactory treatment results, and achieve the effect of alleviating water resources tension

Inactive Publication Date: 2019-04-09
成都明道食品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some relatively innovative processing methods currently exist, and the processing effect is not satisfactory

Method used

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Embodiment Construction

[0017] The present invention will be further described in detail in conjunction with specific embodiments below.

[0018] A kind of oil field wastewater treatment process, comprises the following steps:

[0019] Step 1. Extract oilfield wastewater and let it settle naturally for 5h-8h;

[0020] Step 2, extract the upper layer of clear water, add 40g-60g of alkali to each cubic meter of waste water, and adjust its pH value to 8-10;

[0021] Step 3. Evaporate the adjusted water in vacuum, the evaporation temperature is 120°C-150°C, and the evaporation time is 2h-3h;

[0022] Step 4, further heating and concentrating the salt-making mother liquor in step 3 through a concentration tank to become concentrated brine;

[0023] Step 5, produce calcium chloride dihydrate after the bromine mother liquor in the step 3 is passed through the sedimentation;

[0024] Step 6, liquefying water vapor into water, the liquefaction temperature is -10°C--20°C;

[0025] Step seven, after filteri...

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PUM

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Abstract

The invention discloses an oilfield wastewater treatment technology. The oilfield wastewater treatment technology comprises the following steps: step 1, pumping oilfield wastewater and naturally precipitating for 5 to 8h; step 2, pumping upper-layer clean water and adding 40 to 60g of alkali into each cubic meter of the wastewater; regulating the pH (Potential of Hydrogen) until the pH value is 8to 10; step 3, carrying out vacuum evaporation on the adjusted water, wherein the evaporation temperature is 120 to 150 DEG C and the evaporation time is 2 to 3h; step 4, heating and concentrating a salt preparation mother solution in step 3 through a concentration tank to prepare concentrated marinade; step 5, precipitating a bromine preparation mother solution in step 3 to prepare calcium chloride dehydrate; step 6, liquefying water steam into water, wherein the liquefying temperature is -10 to -20 DEG C; and step 7, after filtering, discharging. The oilfield wastewater treatment technologycan be used for collecting useful resources including sodium chloride, bromine, the calcium chloride dehydrate and the like in the oilfield wastewater.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to an oil field wastewater treatment process. Background technique [0002] Oilfield water is the groundwater directly connected to the oil reservoir. It forms a unified fluid system with oil. Oilfield water in a broad sense refers to groundwater in oilfield areas, including oil reservoir water and non-oil reservoir water. Oilfield water is unavoidable in the process of oil exploitation, and if it is not treated, it will have a significant impact on the environment. The traditional treatment method focuses on removing the oil, but ignores the comprehensive recycling of resources. Some relatively innovative processing methods currently exist, and the processing effect is not satisfactory. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a treatment process for oilfield wastewater, which can recover useful res...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01F11/24C01D3/04C01B7/09
CPCC02F9/00C01B7/096C01D3/04C01F11/24C02F1/001C02F1/02C02F1/048C02F1/66C02F2001/007
Inventor 洪文刊
Owner 成都明道食品有限公司