A treatment method for high-temperature and high-salt organic wastewater produced by softening oilfield sewage
A technology for organic wastewater and oilfield wastewater, which is applied in water/sewage treatment, mining wastewater treatment, neutralized water/sewage treatment, etc., and can solve the problems of temperature and salt content, large amount of dosing, and the influence of incoming liquid temperature and other issues, to achieve the effect of effective use of resources, improvement of safety, and prevention of emissions
Active Publication Date: 2018-05-11
KARAMAY SANDA NEW TECH
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Problems solved by technology
Conventional treatment methods for high-temperature and high-salt organic wastewater, petroleum, COD, and volatile phenols, such as: (1) DECOM system + advanced oxidation system, the disadvantages are large dosage and high cost
(2) DECOM system + biochemical system (halophilic bacteria bioaugmentation system), the disadvantage is greatly affected by temperature and salt content, the optimal temperature is 35°C, and the impact resistance is relatively poor, once it is impacted, the recovery time is longer
(3) Coagulation sedimentation + biochemical system, the disadvantage is affected by the temperature of the incoming liquid, and the requirements for automatic control are high. The pre-cultivation of the biochemical system takes a long time. Once it is impacted, the recovery period is longer
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[0014] 1) Prepare 40wt% water purifier, 20wt% sedimentation aid and 0.2wt% anionic polyacrylamide respectively. The water purifier is polyferric sulfate, and the sedimentation aid is calcium hydroxide solution. 2) Take three 1000ml high-temperature and high-salt organic wastewater produced by the softening of oilfield sewage into beakers. 15-20mg / L, add a pH regulator under the premise of continuous mechanical stirring, so that the pH value of the wastewater is 5.0-6.0. 3) Add water purifiers 300mg / L, 400mg / L, 500mg / L respectively, and add 200mg respectively while stirring / L settling aid, add anionic polyacrylamide 6mg / L after stirring for a period of time, and carry out preliminary separation of oil, water, mud, COD, petroleum, and volatile phenols for high-temperature and high-salt organic wastewater. The test results are shown in the table below.
[0015] Table 1. Results after coagulation test of high-temperature and high-salt wastewater
[0016]
[0017] 4) After s...
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Belonging to the technical field of environmental protection, the invention relates to a treatment method for high temperature and high salinity organic wastewater generated by oilfield sewage softening. The treatment method consists of a pretreatment unit, a coagulating sedimentation unit, an ozone oxidation unit, a filter unit and a sludge treatment unit in order, can separate petroleum, volatile phenol, COD and other substances from the high temperature and high salinity organic wastewater, and treats the high temperature and high salinity organic wastewater to achieve up-to-standard emission. The sludge treatment unit re-treats the sludge generated by coagulating sedimentation to prevent harmful substance discharge. Also, resources are effectively utilized.
Description
technical field [0001] The invention relates to a treatment method for high-temperature and high-salt organic wastewater produced by the softening of oilfield sewage, more specifically, a method for separating harmful substances such as COD, petroleum, and volatile phenol in high-temperature and high-salt organic wastewater, which belongs to the environmental protection technology field. Background technique [0002] In the oilfield sewage treatment station, a large amount of high-temperature and high-salt organic wastewater is produced by the softening of oilfield sewage. The main sources of these high-temperature and high-salt organic wastewater are three parts: ① Ion exchange during the softening process during the treatment and reuse of high-temperature ultra-heavy oil sewage Salt-containing wastewater; ② Resin-softened regenerated sewage in the groundwater treatment system; ③ Boiler drum boiler water. The temperature of high brine is 80-90°C. After natural cooling, the...
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IPC IPC(8): C02F9/04C02F11/14C02F103/10
CPCC02F1/001C02F1/52C02F1/56C02F1/66C02F1/722C02F1/78C02F9/00C02F11/14C02F2101/32C02F2101/345C02F2103/10C02F2301/08C02F2303/06
Inventor 王澄滨聂俊博郭巍贾宝贵高则彬马超王小亮何世全熊建军
Owner KARAMAY SANDA NEW TECH