Concentration measuring method of total nitrogen total phosphorus total sulfate in oily wastewater
A sulfate and wastewater technology, applied in the field of environmental engineering, can solve the problems of no pollutant degradation and high price of small columns, and achieve the effect of avoiding cumbersome
Inactive Publication Date: 2013-02-13
CHINA NAT OFFSHORE OIL CORP +1
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The application of the pretreatment column has greatly broadened the application field of ion chromatography, but the price of this small column is high, and it only transfers the pollutants to achieve the purpose of analysis by ion chromatography, but does not degrade the pollutants
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Embodiment 1
[0018] The raw water of an oil field in Tianjin contains a large number of ions, which will combine with each other under certain conditions to form water-insoluble compounds, making the water turbid and causing scaling on the pipe wall. The oil displacement polymers and corrosion and scale inhibitors used in the oil recovery process increase the concentration of nitrogen-containing and phosphorus-containing compounds in the effluent. In this paper, the combined process of physical method and photoelectric catalytic oxidation is used to pretreat the raw water in order to determine the NO in it. 3- 、PO 4 3- , SO 4 2- concentration. The processing method is as follows:
[0019] (1) Leave the oily wastewater fully still, and take the lower water sample after the oil-water two-phase layer is separated;
[0020] (2) The lower water sample is centrifuged by a centrifuge.
[0021] (3) The water sample treated in step (2) enters the photoelectric catalytic oxidation device; the...
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Abstract
The invention provides a concentration measuring method of total nitrogen total phosphorus total sulfate in oily wastewater. The concentration measuring method is characterized in that a physical method and a photoelectric catalytic oxidation combination process are adopted to pretreat the oily wastewater. The specific steps are as follows: under the condition of normal pressure and temperature, a gravity or centrifugal separation machine 2 removes oil slick and dispersed oil in the oily wastewater 1; and pretreated wastewater enters into a photoelectric catalytic oxidation reactor 3 and carries out full decomposition of organic matter and surplus oil matter through catalyst and light source radiation. Water discharged from the photoelectric catalytic oxidation reactor is directly led into an ion chromatograph 5 for testing after being filtered by a filter membrane 4 of 0.2 micrometer. After being treated by means of combined process, oil content of the oily wastewater is reduced to less than 0.1mg / L and concentration of organic matter of the oily wastewater is reduced to less than 10mg / L.
Description
technical field [0001] The invention belongs to the technical field of environmental engineering and is a water quality measurement and analysis technology for industrial water treatment, specifically a method for measuring the concentration of total nitrogen, total phosphorus and total sulfate in oily wastewater, which is characterized in that it adopts a combination of physical method and photoelectric catalytic oxidation The process is pretreated. Background technique [0002] Oilfield produced water has the characteristics of high oil content, complex composition, high salinity and high water temperature. The use of polymers during oil flooding increases the concentration of nitrogen and phosphorus in produced water. For a long time, the analysis of nitrogen, phosphorus, sulfur and other substances in oilfield produced water has focused on chemical methods. In particular, the method for measuring the concentration of total nitrogen, total phosphorus, and total sulfate ...
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IPC IPC(8): G01N30/06C02F9/08
Inventor 赵慧谢陈鑫滕厚开郑书忠李肖琳张艳芳秦微
Owner CHINA NAT OFFSHORE OIL CORP