Oct.2013,Vol.42,No.5
CHEMICAL ENGINEERING OF OIL & GAS
ABSTRACTS
Application of biodiesel in viscosityreducing techniques for heavy oil
Mao Xue，Xia Fei，Yue Hairong，Liang Bin(College of Chemical Engineering，Sichuan University，Chengdu 610065，Sichuan，China) . CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp443～446,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Application of biodiesel as an additive could depend less on the light oil in viscosityreducing techniques for heavy oil. This paper describes the effects of addition of biodiesel on the heavy oil viscosity. The results indicate that moderate amount of biodiesel provides favorable effects on the viscosity reduction, which is superior to that of diesel. The origin of the viscosity reduction was confirmed by the FTIR spectra of the heavy oil mixed with biodiesel or diesel. The replacement of the hydrogen bonds in heavy crude oil could dissociate the aggregates of the asphalt and resin, which weakened the interaction between asphalt and resin and thus reduced the viscosity. With the increase of biodiesel added, the effect of polarity increased and the viscosity further reduced; while the added amount of biodiesel exceeded 15%, the role of polarity in the viscosity reduction was not obvious.
Key words: biodiesel, heavy oil, viscosityreducing, hydrogen bonds
Discuss on the energy-saving measures of low-load operation of natural gas purification device
Wang Shijian, Ran Wenfu, Chen Fenghua(Changshou Branch of Chongqing Natural Gas Purification Plant General,Chongqing 410259, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp447～451,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Based on the analysis of the power consumption constitution of the natural gas purification devices in low-load operation，this paper analyzed the cause of the increasing in electricity consumption and gas consumption, then discussed the energy conservation measures through modification in operation and transformation in technology. Practical adjustments included adjusting the layers of the solution putting into tower and circulation amount in the desulfurization unit, the fuel gas of the sulfur recover unit, the load and volume of the wind of stove boiler; and the running time of sewage unit according to the actual situation, as well as starting or stopping mobile device of water circulation unit. Technological aspects include using the excess air volume of the burning furnace fan, adding the side road of the DC sulfur recovery device, and transforming the solution circulating pump stages and low pressure steam loop of the sulfur intercooler. Through modification in operation and transformation in technology, the power consumption of the device in low-load operation was effectively reduced.
Key words: natural gas purification, low-load operation, energysaving measures
Process improvement of Kelameili oil and gas processing device
Zhang Feng1, Jiang Hong2, Zhang Dongping1, Xiong Tao1(1.First Gas Plant of Xingjiang Oilfield Cooperation, Kelamayi 834000, Xingjiang, China；2.Southwest Petroleum University, Chengdu 610500, Sichuan, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp452～456,2013（ISSN 1007-3426, IN CHINESE）
Abstract: The goal of the Kelameili oil and gas processing device is controlling hydrocarbon dew point and water dew point of the outputting natural gas. It refrigerates the condensate gas by injection of ethylene glycol, J-T valve throttling,and low temperature separation. It uses two stage flash + one stage stable+stripping processes to produce condensate oil. The present process has some problems, for example， the separation of alcohol and hydrocarbon is difficult, the loss of ethylene glycol regeneration tower is serious, the residual heat of the condensate oil is unreasonably used, and part of the liquid hydrocarbon discharges from the sewage pipeline. Some improvements are put forward including enhancing the temperature of alcohol and hydrocarbon separation, improving regeneration process of ethylene glycol, changing the heat exchange process of condensate oil, and recovering liquid hydrocarbon of rich gas compressing unit. These measures save fuel gas of 10.9×104 m3, increase natural gas output of 13.2×104 m3 and condensate oil yield of 145.2 t every year.
Key words: oil and gas processing, process improvement, alcohol and hydrocarbon separation, ethylene glycol regeneration, residual heat of the condensate oil, liquid hydrocarbon recovery
Reason and retransformation of columns premature flood in amine unit of LNG facilities
Yang Xiaodong, Liu Shimin(Chemtex Shanghai Chemical Engineering Co., Ltd, Shanghai 201210, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp457～462,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Through three years' spot tracing of unstable operation of absorber and regeneration absorber of desulfurization system in LNG facilities, several control measures have been attempted. Through exclusive method and hydraulic study, it is shown that the flood caused by downcomer blocking of the acid gas absorber is the root reason that resulted in unstable operation of LNG facility in the northern China under high load. A comparison study on operation has been done after a complete change of the column vessels and internals. And the results have proved the judgment was right. Suggestions on both design and operation of amine unit of LNG plants have been presented.
Key words: LNG, amine unit, acid gas absorber, foaming, downcomer blocking flood
Challenges and countermeasures of inferior quality heavy oil processing technology：Effects of light passenger car electrifying on heavy oil processing
Tian Yuanyu1,2, Qiao Yingyun2，Liu Feng3(1. State Key Laboratory of Heavy Oil, China University of Petroleum (East China), Qingdao 266580，Shandong, China; 2. Key Laboratory of Low Carbon Energy Chemical Industry in Universities of Shandong, Shandong University of Science and Technology，Qingdao 266580, Shandong, China；3. China Petroleum and Planning Institute，Beijing 100083, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp463～467,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Aiming at the mass production of heavier and inferior crude oil and unconventional inferior quality heavy oil, such as the shale oil, oil sands, heavy (thick) oil, ultra heavy oil, deep oil, asphalt and coal tar, and discussing the motor vehicle emissions standards, the structure of the automobile fuel system, quality standards and requirements as well as the light passenger car electrifying. The objective products of crude oil to light oil is the motor gasoline gradually transiting to the kerosene and diesel fuel, and the kerosene and diesel oil with low sulfur and low aromatic hydrocarbons was also put forward. At the same time, the development direction of inferior quality heavy oil processing technology was analyzed. Emphatically, the heavy oil fluidized pyrolysis process, the heavy oil coupling of fluidized pyrolysis gasification process, the heavy oil catalytic cracking process with high temperature and short contact, the heavy oil suspended bed hydrogenation cracking process and the kerosene and diesel oil saturation pyrolysis process will become important direction and hotspot of inferior quality heavy oil technology research and development in the future.
Key words: inferior quality heavy oil, conversion of heavy oil to light oil, electrifying, efficient transformation, development trend
Characteristics researches of natural gas hydrate growth on the suspended bubble surface
Ye Peng, Liu Daoping, Zhang Jian(Institute of Refrigeration Technology, University of Shanghai for Science and Technology, Shanghai 200093, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp468～472,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Based on a set of highpressure visual experiment device built for the investigation of the natural gas hydrates crystallization and growth on the suspended gas bubble surface, the influence factors such as pressure, temperature, water quality were analyzed and discussed. The results showed that the higher pressure or the lower temperature resulted in the less induction time and growth time, which led to surface changing from rough to smooth. The surface of hydrate film in distilled water is smoother and tidier than that in pure water. Under the same experimental conditions, the hydrate film in distilled water grew faster than that in pure water.
Key words: natural gas，hydrate，suspended bubble，growth characteristics，induction time
Influence factors analysis of propane-mixed refrigerant natural gas liquefaction process based on HYSYS software model
Zheng Yunping1, Xia Dan1, Liu Xiaohong2, Li Jianfeng1(1.Southwest Petroleum University, Chengdu 610500, Sichuan, China; 2. Investigation and Design Institute of Zhongyuan Petroleum Exploration Bureau, Puyang 457001, Henan, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp473～477,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Propane-mixed refrigerant cycle dominates the baseload liquefaction plant for its advantages of saving investment, simple process and fewer units. The HYSYS simulation is carried out and the effects of process parameters, such as gas pressure, mixed refrigerant pressures and mixed refrigerant composition on the refrigerating capacity and energy consumption of the compressors and water cooler are analyzed. The simulation results show that: increasing the gas pressure and reducing the methane content of the refrigerant can not only enhance its refrigerating capacity but also reduce the energy consumption; and increasing the pressure of the low pressure refrigerant and decreasing the pressure of the high pressure refrigerant can reduce the energy consumption but weaken the refrigerating capacity. A scheme of enhancing the refrigerant flow and reducing the methane content is proposed to make up for the reduction of the refrigerating capacity.
Key words: natural gas liquefaction, propane precooling, mixed refrigeration, HYSYS, simulation
Preparation of La-BiVO4 catalyst and its photocatalytic reduction property of CO2
Wang Jianbo1, Xu Yanfeng1, Sun Yuan2(1.Department of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001,Anhui,China; 2.Department of Biological and Chemical Engineering, Chien shiung Institute of Technology, Suzhou 215400,Jiangsu,China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp478～481,2013（ISSN 1007-3426, IN CHINESE）
Abstract: ZLa-BiVO4 photocatalyst was prepared by chemical precipitation method, and its photocatalytic reduction of CO2 in water was examined. The catalyst was characterized by TG-DTA, DRS and XRD technology, and the effect of roasting temperature and other conditions on the activity of photocatalytic reduction of CO2 were studied. The results showed that monoclinic phase La-BiVO4 calcined at 800 ℃ has the highest activity. When the amount of catalyst was 0.8 g/L, reaction time was 8 h, CO2 flow was 250 mL/min, the reaction temperature was 70 ℃, and the concentration of NaOH and Na2SO3 were both 0.10 mol/L, yield of methanol reached 290.18 μmol/g.
Key words: La-BiVO4, photocatalytic, reduction of CO2, methanol
Optimization study of natural gas process unit in Dina 2 gas field
Tan Jianhua, Chen Qinghai, Li Jing, Wang Shuguo, Zhang Xiaodong(Natural Gas Department of Tarim Oilfield Company，Korla 841000, Xinjiang, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp482～486,2013（ISSN 1007-3426, IN CHINESE）
Abstract: J-T valve+ethylene glycol low temperature freezing separating process was adopted to separate water and hydrocarbon of natural gas, and prevent hydrate formation by ethylene glycol in Dina 2 gas field. The design capacity of a single set is 400×104 m3/d and the design refrigeration temperature is -20 ℃. When the plant started production, the feed gas temperature raised from 45 ℃ to 65 ℃. The ethylene glycol dosage was too small to prevent the hydrate formation under the design refrigeration temperature, and the hydrate formed in the LT separator frequently. The process capacity was restricted to 200×104 m3/d, and the refrigeration temperature was -15 ℃. In this paper, the simulation and optimization of the dehydration and dealkylation unit was studied by HYSYS software. The increasing saturated water of feed gas resulted in the hydrate formation. The appropriate parameters table was set out, which helped to prevent hydrate formation. The process capacity of dehydration unit meets the requirement of design parameter after the installation of water separator. The yield of LPG and light hydrocarbon are improved significantly while the loss of ethylene glycol was decreased. The standard gas process was proposed for condensate gas, which flow into air cooler first then by water separator.
Key words: Dina, HYSYS, condensate gas, dehydrate, water separator
Test method study of natural gas interchangeability for industrial gas burners
Liu Pengjun, Qin Chaokui, Yang Xianchao(College of Mechanical Engineering, Tongji University, Shanghai 201804, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp487～491,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Industrial gas appliances have a huge market prospect in boilers and industrial furnaces. In this paper, gas burners and its working process was briefly introduced. Based on EN676, a new test method of natural gas interchangeability was put forward to test industrial appliances’ combustion performance. Three typical burners were selected to test the thermal performance when fuelled with 6 kinds of natural gases. The results showed that this method is suitable for interchangeability study of boiler burner, and its reliability was proven.
Key words: natural gas, industrial gas burners, interchangeability, test method, EN676
Reuse technology of slick water fracturing flowback fluid
Liu Youquan1, Chen Pengfei1, Wu Wengang1, Xiong Ying1, Yang Feng2, Zhao Wanwei1, Zhao Hao2（1. Research Institute of Natural Gas Technology, PetroChina Southwest Oil and Gasfield Company，Chengdu 610213, Sichuan, China; 2. Southern Sichuan Gas District, PetroChina Southwest Oil and Gasfield Company，Luzhou 646001, Sichuan, China）CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp492～495,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Volumefracturing in unconventional reservoirs needs massive fluid and brings plenty of flow-back fluid which contains varied ions, residual additives, suspending matters and so on，so harmless disposal has great difficulties. This paper introduced the ways of disposal flow-back fluid from volume-fracturing, and combined the actual circumstance of unconventional gas well in Sichuan. We formed the disposal flow-back fluid process. Laboratory study showed that concentration of residual additives were low in flow-back fluid, but had a certain amount of total dissolved salts, the drag friction of the treated flow-back fluid was the same as the fracturing fluid produced by the freshwater. It also came to the same conclusion in field trial, which gained efficient reservoir reformation, saved freshwater, reduced drainage of waste water, and achieved energy conservation and emission reduction.
Key words: volumefracturing, flow-back fluid, reuse, unconventional reservoirs
Synthesis and properties evaluation of ultra-high density drilling fluid dispersant
Xie Jianyu, Li Bin, Zhang Bin(Drilling Technology Research Institute of Zhongyuan Oil Exploration Bureau，Puyang 457001, Henan, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp496～500,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Ultrahigh density drilling fluid dispersant JZ-1 was synthesized by graft copolymerization of natural materials and vinyl monomer. The effects of molecular weight regulator, AMPS and raw materials ratio on the dispersant properties were studied. Copolymerization was characterized with IR. Thermal stability of copolymer was measured by thermal analysis. Barite surface potential was studied by Zeta potential instrument. The mud properties of copolymer as dispersant for drilling fluids were evaluated in laboratory. The experimental results showed that funnel viscosity decreased from 282 s to 130 s when 2% JZ-1 were added to the drilling fluid with the density of 2.8 g/cm3, and the rheology behavior and sedimentation stability of drilling fluid were improved significantly.
Key words: graft polymer, dispersant, ultrahigh density, drilling fluid, synthesis
Application of polyamine imitation oil-based drilling fluids in the long horizontal section in western Sichuan
Chen Zhihui，Lan Lin，Yang Wenjing，Xia Haiying（Engineering Technology Institute of Southwest Petroleum Branch Company，Sinopec，Deyang 618000，Sichuan, China）CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp501～505,2013（ISSN 1007-3426, IN CHINESE）
Abstract: For easy jamming of the horizontal section of shallow long horizontal well drilling in the western Sichuan region, or sandstone and mudstone interlaced prone to borehole instability and other problems, a novel polyamine imitation oil-based drilling fluid was studied. The drilling fluid is mainly composed of polyamine with strong inhibiting effect and MEG (methyl glucoside) with the primary role of lubrication，lowering filtrate and inhibiting function. The drilling fluid has high lubricating property and strong inhibitory, and the performances of evaluation system approach the level of oil-based drilling fluid. Field application shows that polyamine imitation oil-based drilling fluid has the advantages such as stability performance, a wide range of density regulation, rheological easy to control, small amount of fluid loss and the thin cake, good toughness, effectively inhibiting shale hydration dispersed, and maintaining the borehole wall stable. Thus, the drilling fluid meets the requirements of the long horizontal section construction needs in western Sichuan.
Key words: long horizontal well section, polyamine, methyl glucoside, strong inhibitory, wellbore stability
Properties research of potassium silicate/polyvinyl alcohol inhibitor
Zhang Yurui, Wan Liping, Ma Chentao, Shu Xiaobo, Li Gao, Zhu Li(State Key Laboratory of Oil and Gas Geology and Exploration, Southwest Petroleum University, Chengdu 610500, Sichuan, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp506～509,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Potassium silicate/polyvinyl alcohol inhibitor was selected to protect the borehole instability in foam drilling, and its inhibitive properties were evaluated by means of shale selfpriming experiment, mudmaking inhibition of bentonite, rolling recovery experiment and hardness test. The results indicate that potassium silicate/polyvinyl alcohol has a good inhibitive properties. Finally, the inhibition mechanism of the inhibitor was studied by XRD. The results showed that the strong inhibition of potassium silicate/polyvinyl alcohol to the shale is derived from the synergies of potassium silicate and polyvinyl alcohol, in which sealing property and film forming ability are the major factors to maintain borehole stability.
Key words: potassium silicate, polyvinyl alcohol, foam drilling, inhibitive property
A new method to screen scale inhibitors
Liu Min1，Xing Xijin2， Wang Shan2，Guo Xinhui3(1.School of Resource and Environmental Science, Southwest Petroleum University, Chengdu 610500, Sichuan, China；2. Research Institute of CNOOC, Beijing 100027, China;3. Drilling Technology Research Institute of PetroChina Jilin Oilfield Company, Songyuan 138000, Jilin, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp510～514,2013（ISSN 1007-3426, IN CHINESE）
Abstract: This paper puts forward a new method to screen scale inhibitors. It's an improvement to the traditional method of solid suspended objects measurement named Filter Membrane Filtration Method. The material which is extracted via filter membrane＜0.45 μm is defined as suspended scale, and the material which attaches to the surface of conical flask is defined as sedimentation scale. The content of the sum of suspended scale and sedimentation scale is called total scale quantity. We create a new method to evaluate and select scale inhibitors via measuring the change of scale in quality, observing the change of scale in morphology by polarizing microscope and scanning electron microscope, and analyzing component of scale by X-ray diffraction and energy spectrum analysis. Compared with industrial standard, this new method can estimate scale inhibitors performance so handy, quickly, effectively and reliably that we think it have the value of popularization in the oilfield.
Key words: filter membrane filtration method, suspended scale, sedimentation scale, evaluation, scale inhibition
Research of the corrosion inhibition and inhibition to oilfield bacteria by persimmon husk extraction
Chen Gang, Gao Qilong, Ma Fengyun, Zhou Min, Zhang Jie(School of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, Shaanxi, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp515～519,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Application of persimmon husk extraction in the treatment of oilfield produced water was carried out based on the abundant fruits resources of Shannxi province. Persimmon husk was extracted with water and ethanol, and the extractions were screened as corrosion and bacteria inhibitors. The results showed that the both extractions are effective for corrosion inhibiting, and the extraction of water is more potent than that of ethanol. The extraction of water is active against sulfate reducing bacteria (SRB), but inefficient against iron bacteria (IB) and total general bacteria (TGB), while the extraction of ethanol is inefficient against the three oil field micro-organisms.
Key words: persimmon husk, treatment of oilfield produced water, corrosion inhibiting, bacteria inhibiting
An applicability evaluation research on conventional gas analysis standards applied to shale gas
Wan Ying, Gong Teng, Zhang Qingnan, Wang Hongli, Luo Qin（Research Institute of Natural Gas Technology, PetroChina Southwest Oil and Gasfield Company, Chengdu 610213,Sichuan,China）CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp520～523,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Conventional gas standards and analysis methods are commonly used in shale gas exploration and development process, because the composition of shale gas is similar to natural gas. The applicability research whether pipeline natural gas analysis standards are fit for shale gas testing was conducted in this article. Based on the result, some suggestions of drafting shale gas analysis and measurement standards are given.
Key words: shale gas, applicability, analysis, standards
Rapid quantification of flash point in using lubricant by Near-infrared spectroscopy
Xing Zhina, Wang Juxiang, Liu Jie, Shen Gang(Department of Airborne Vehicle Engineering, Naval Aeronautical and Astronautical University, Yantai 264001, Shandong, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp524～527,2013（ISSN 1007-3426, IN CHINESE）
Abstract: A rapid NIR measurement was applied to flash point of using lubricant. The spectra band were chosen by comparing sample’s spectra and mixed fuel’s spectra. The different calibration models of flash point were built by the means of ANN and PLS respectively. Then these models were compared through model valid parameter. In result, the ANN model with three characteristic bands was optimal. Its R2 and SEP were 0.918 3, 3.06 ℃ respectively. It was indicated that ANN method can determinate flash point of using lubricant as a non-linear chemometrics means, which could take place of traditional method for rapid measurement of diesel lubricant quality. That’s to say, NIR technology was an important technology to judge using lubricant whether mixed with light oil and provide instruction for confirming equipment failure in time.
Key words: using lubricant, flash point, near-infrared spectroscopy, artificial neural network (ANN)
Study on membrane treatment of wastewater produced from petrochemical industry
Ning Xindao，Li Qirong（PetroChina Urumqi Petrochemical Company，Urumqi 830019，Xinjiang, China）CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp528～533,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Large quantity of effluents containing oil, water and complicated pollutants produced from the refinery process do extremely harm to our environment. The aim of our study is to investigate membrane technology (ultra-filtration and reverse osmosis) for petrochemical wastewater treatment and recycles. The treated water could be recycled as compensative water for boilers and other utilizations. The experiment results show that the percentage removal of COD, NH3-N and petroleum oil can achieve over 90% by this process; after ultra-filtration, the suspended solid can be decreased to less than 1 mg/L; and the quality of treated water reaches the standard of petrochemical industry discharge and utilization.
Key words: ultra-filtration, refining wastewater treatment, wastewater
New comprehensive treatment method of effluvial gas of sour water feed tanks in refineries
Liu Chengjun1, Deng Jianyong2, Wen Shichang1(1.CPECC EastChina Design Branch, Qingdao 266071, Shandong, China;2.PetroChina Dagang Petrochemical Company，Tianjin 300280, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp534～539,2013（ISSN 1007-3426, IN CHINESE）
Abstract: This article provides a comprehensive treatment of the effluvial gas of sour water feed tanks. Different from normal treatment such as adsorption, absorption or condensation, and based on the process characteristics of sour water stripper, this method decreases the volatile components content maximally by changing process flow and operating conditions. The main measures include: ① The operating pressure of sour water degassing drum is kept as low as possible (0.05－0.1 MPa); ② Sour water in degassing drum is heated to 55－60 ℃ using low temperature waste heat of purifying water from the stripping bottom to make the degassing drum operated in higher temperature. ③ The first, second and third stage condensate liquid in single stripping tower or the return liquid from ammonia stripping reflux drum in double stripping tower is sent to a recycle liquid surge drum, and then is pumped to the outlet pipe of sour water feed pump; ④The thickness of oil layers in sour water feed tanks increases to 600-900 mm to form oil seal, preventing H2S or other effluvial compounds running out of the sour water feed tanks. After the above measures are taken, there would have no effluvial gas discharging from the sour water feed tanks in normal operating conditions. This method has several advantages, such as no need of additional adsorbent, absorbent or coolant, low investment and operation cost, simple operation and no secondary pollution.
Key words: sour water feed tanks, pollution treatment, sour water degassing drum, temperature, pressure, recycle liquid surge drum, oil seal, H2S, ammonia
Application of aeration desulfurization technology in oily wastewater treatment in Xinjiang oilfield
Yan Zhong1, Zhuang Shuyi2，Ma Xiaofeng1，Huang Lianhua1,Yang Xiaohong3（1.China Petroleum Xinjiang Oil Field Company Test Research Institute，Karamay 834000, Xinjiang, China; 2. China Petroleum Xinjiang Oil Field Company Oil Two Factory，Karamay 834000, Xinjiang, China; 3.China Petroleum Exploration and Development Research Institute of Xinjiang Oil Field Company，Karamay 834000, Xinjiang, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp540～544,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Aiming at the oilfield sewage containing soluble sulfide, through the introduction of jet aeration device, this paper proposes an advanced technology with good effect on sulfur removal. Field test data show that, when the sulfur in the feed water of the 1# reaction buffer tank (5－8 mg/L ) does not change too much, the concentration of sulfide in the effluent drop from 5－7 mg/L to 0.2－0.6 mg/L; hydrogen sulfide content in air at the top of the tank also drop from the original 10－40 mg/m3 to 0－5 mg/m3. Due to the introduction of the flotation effect in the processing link, the oil concentration in the effluent of reaction buffer tank is reduced correspondingly while speeding up the sludge settling velocity, so that the content of suspended solids and oil reaching the standard have improved under the same conditions. The flotation process is introduced into crude oil sewage treatment process mainly based on the sedimentation process, which is a breakthrough for the principle and technology of current crude oil sewage treatment.
Key words: jet aeration，oily wastewater，soluble sulfide，removal of hydrogen sulfide，application of oil field
Optimization of protective measures and safety impact study of high sulfur gas field
acid pollution on the electric transmission line of natural gas purification plant
Wang Heqing，Chen Weiguo，Miao Hui，Zhou Peili(Zhongyuan Oilfield Puguang Branch, Dazhou 636156，Sichuan, China) CHEMICAL ENGINEERING OF OIL & GAS, VOL.42, NO.5,pp545～548,2013（ISSN 1007-3426, IN CHINESE）
Abstract: Based on the gas emission characteristics of natural gas purification plant and concentration distribution prediction in atmosphere during the development process of high sour gas filed, insulation performance analysis of acid gases on the 220 kV line was conducted, taking Puguang gas field as example. Insulating property of polluted insulator and the air under simulated acid mist environment were measured respectively. The results showed that flashover voltage of insulator dropped about 20% under the action of salt mist. Insulating strength of the air dropped about 15.1% when the pH value of mist was 3. After the combination of acid mist (pH=3) and class II air pollution, insulating strength of the air dropped about 23.2%. Lightning withstand level of electric transmission line decreased 20% approximately under acid rain and acid mist environment with pH value of 3. Combined the laboratory analysis results and practical situation in Puguang gas field, the protective measures of electric transmission line in acid gas field were analyzed.
Key words: development of high sulfur gas field, electric transmission line, protective measures, optimization
