CN105716992A - Measuring method for gasification rates of heavy oil at outlet temperature of heating furnace - Google Patents
Measuring method for gasification rates of heavy oil at outlet temperature of heating furnace Download PDFInfo
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Abstract
The invention discloses a measuring method for the gasification rates of heavy oil at the outlet temperature of a heating furnace. The measuring method includes the following steps that a sample is placed in a thermogravimetry analyzer sample pond, temperature rise speeds and the final temperature of a thermogravimetry analyzer are set, and continuous sample weight loss data in the temperature rise process is recorded; the continuous weight loss data serves as longitudinal coordinates, the temperature of the sample pond serves as transverse coordinates, and a curve chart is drawn; the gasification rates of the heavy oil sample are measured at different temperature rise rates respectively, the different temperature rise rates serve as transverse coordinates, the gasification rates corresponding to the outlet temperature of the heating furnace serve as longitudinal coordinates, a fitted curve tendency chart is drawn, a fitted curve in the tendency chart extends to a high temperature rise rate region, and according to the tendency chart, the heavy oil gasification rate, corresponding to the specific temperature rise rate at the outlet temperature of the heating furnace, of the heavy oil can be obtained. The testing process is simple and rapid, the use amount of raw materials is small, repeatability is good, and the defect that in the prior art, the gasification rates of the heavy oil at the outlet temperature of the heating furnace can only be obtained through experience and software simulation is overcome.
Description
Technical field
The present invention relates to mink cell focus manufacture field, particularly a kind of mink cell focus is at the assay method of furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate.
Background technology
Along with the yield of non-conventional oil resource (such as Venezuela's extra heavy oil and Canada's oil sands bitumen) increases year by year, futures commodity on global crude oil market trend towards heaviness and in poor quality, and the development of global economy to the demand of light-end products also under cumulative year after year, dual-pressure the highly-efficient processing of mink cell focus utilize and have become as one of subject matter that energy enterprise faces.Atmospheric and vacuum distillation is as the leading manufacturing process of refining enterprise, and its ruuning situation is directly connected to the high-efficiency and economic processing of mink cell focus.Have influence on the heating furnace that one of atmospheric and vacuum distillation unit key equipment running quality is device, especially heating under reduced pressure stove.For mink cell focus, must adjusting operation in order to better, implementation process is strengthened, and improves device operation efficiency and level, it is necessary to furnace apparatus unit flow process is designed and optimizes by (mink cell focus) for processing raw material.One of key issue therein is how to obtain mink cell focus every physical parameter when heating furnace tube.
Heating furnace, especially the outlet configurations transformation relating generally to heating furnace is made in the transformation of vacuum furnace and design, the injection rate of steam regulates, the arrangement etc. of furnace tubing in burner hearth, in order to design the heating furnace meeting Production requirement and energy efficient, designing unit is in the urgent need to knowing mink cell focus many physico-chemical property parameters in heating-furnace, and such as mink cell focus rheological behavior under the high temperature conditions, the green coke trend on high temperature tube wall, heat-transfer character, especially it is at the gasification degree of specific heater outlet temperature.
Rate of gasification is that mink cell focus system middle-molecular-weihydroxyethyl is less, the relatively low light component of boiling point in heating furnace tube by thermal evaporation degree.The rate of gasification of furnace outlet heavy oil not only determines heavy gas-liquid mixed mobility status (turbulent flow or laminar flow) in furnace tubing, but also determines the extracting rate of mink cell focus decompression distillation.For determining the key design parameters such as heating furnace tube calorific intensity, heat transfer coefficient, ensure that the distillation production run of mink cell focus deep vacuum distillation has important practical significance.
The rate of gasification size of furnace outlet mink cell focus is main relevant with the heating rate of arrival heater outlet temperature with the air pressure of coil outlet, heater outlet temperature, residing boiler tube ambient pressure is more little, be conducive to the volatilization of mink cell focus liquid phase molecule, temperature is more high, and mink cell focus system molecular motion is more violent, and rate of gasification is more big, and rise to same temperature, heating rate is more big, and liquid-phase vaporization balance fails to be formed in time, and rate of gasification can be caused less than normal.Determine that mink cell focus is generally adopted Theoretical Calculation or dependence experience obtains in the work off one's feeling vent one's spleen method of rate of heating furnace tube at present, simultaneously because furnace outlet temperature and heating rate are all higher, bigger in laboratory simulation difficulty, cause that measured data is deficient, limit Fine design and the process intensification of heating furnace, therefore, the rate of gasification of mink cell focus under specific heater outlet temperature and promotion rate conditions is determined at present in the urgent need to a kind of method.
Summary of the invention
It is an object of the invention to as overcoming above-mentioned the deficiencies in the prior art, the demand with strengthening design is optimized for current domestic mink cell focus atmospheric and vacuum distillation unit heating furnace reformation, make up mink cell focus to work off one's feeling vent one's spleen the deficient problem of rate data in heating furnace tube, surveying based on laboratory thermogravimetric analysis on the basis of experimental data, it is provided that a kind of mink cell focus is at the assay method of furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate.
For achieving the above object, the present invention adopts following technical proposals: a kind of mink cell focus, at the assay method of furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate, comprises the steps:
(1) thermogravimetric analyzer preheating is opened, mink cell focus sample is joined in the sample cell of thermogravimetric analyzer, close heating jacket, and determine airtight, open vacuum pump to be bled the sample room of thermogravimetric analyzer, until pressure reaches setting value, being then charged with nitrogen, repeated several times is to guarantee in sample room without air residual；
(2) nitrogen of the sample room and balance room that regulate thermogravimetric analyzer injects flow velocity, makes the pressure in sample room and balance room reach setting value；
(3) arranging heating rate and the final temperature of thermogravimetric analyzer, balance school zero, thermogravimetric analyzer begins to warm up intensification, and thermogravimetric analyzer is automatically recorded in temperature-rise period simultaneously, the continuous Weight loss data that sample produces because of the gasification of light component；
(4) using data weightless continuously for gasification as vertical coordinate, sample cell temperature, as abscissa, makes curve chart, can obtain under specific ramp rate conditions on curve, mink cell focus sample gas rate corresponding under different temperatures；
(5) carry out mink cell focus sample gas rate respectively to measure with different heating rates, with above-mentioned different heating rate for abscissa, sample gas rate corresponding at furnace outlet temperature is vertical coordinate, make matched curve trendgram, matched curve in trendgram is extended to high intensification rate field, according to trendgram, the heavy oil gasifying rate that mink cell focus specific heating rate at furnace outlet temperature is corresponding can be obtained.
Preferably, in described step (1), the time of preheating is two hours.
Preferably, in described step (1), mink cell focus amount of samples is 5mg.
Preferably, in described step (2), the setting value of pressure is 0.05MPa.
Preferably, the final temperature arranging thermogravimetric analyzer in described step (3) is 600 DEG C.
Preferably, different in described step (5) heating rate respectively 10 DEG C/min, 15 DEG C/min, 20 DEG C/min, 25 DEG C/min, 30 DEG C/min, 35 DEG C/min, 40 DEG C/min, 45 DEG C/min, 50 DEG C/min.
Preferably, in described step (5), matched curve obtains according to principle of least square method.
The invention has the beneficial effects as follows, mink cell focus is carried out rate of gasification mensuration by thermogravimetric analyzer by this method, the basis of different heating rates obtains the rate of gasification of mink cell focus at furnace outlet temperature, surveying on the basis of experimental data based on laboratory thermogravimetric analysis, select the suitable Mathematical Models rate of gasification variation tendency that different heating rates are corresponding at furnace outlet temperature, obtain corresponding matched curve, by the prolongation to matched curve trend, the mink cell focus obtaining being under high heating rate rate of gasification at furnace outlet temperature, crucial rate of gasification data are provided for furnace design and Optimizing Reconstruction.Mink cell focus differs greatly with conventional crude structure composition and physico-chemical property, rely on the mink cell focus that computed in software simulation or empirical data obtain relatively low in furnace outlet rate of gasification data reliability, cause that designing unit leaves sizable surplus when design, it is unfavorable for process intensification, adds the difficulty of refinery device high-efficiency and economic processed safely mink cell focus.When present invention, avoiding because rising to same temperature, heating rate is slower, test instrunment is difficult to liquid phase nonequilibrium condition under simulation boiler tube height heating rate, traditional gasification rate assay method is caused to be difficult to the puzzlement of Accurate Determining heavy oil gasifying rate, provide a kind of relatively simple effective method, obtain the rate of gasification data that credibility is higher, filled up being under promotion heating rate and high furnace outlet temperature harsh conditions the blank of heavy oil gasifying rate data.The test process of the present invention is simple, quick, raw material dosage is few, reproducible, compensate for the shortcoming that current mink cell focus can only rely on experience and software simulation to obtain at furnace outlet rate of gasification.
Accompanying drawing explanation
Fig. 1 is under 0.05MPa, and heating rate is the corresponding relation figure of mink cell focus sample gas rate and temperature in 30 DEG C/min process；
Fig. 2 is under 0.05MPa, and under 450 DEG C of conditions, heavy oil gasifying rate is with heating rate changing trend diagram；
Fig. 3 is under 0.05MPa, and under 400 DEG C of conditions, heavy oil gasifying rate is with heating rate changing trend diagram.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
A kind of mink cell focus, at the assay method of furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate, comprises the steps:
(1) open thermogravimetric analyzer to preheat two hours, mink cell focus sample 5mg is joined in the sample cell of thermogravimetric analyzer, close heating jacket, and determine airtight, open vacuum pump to be undertaken being pumped to 0.05MPa by the sample room of thermogravimetric analyzer, until pressure reaches setting value, being then charged with nitrogen, repeated several times is to guarantee in sample room without air residual；
(2) nitrogen of the sample room and balance room that regulate thermogravimetric analyzer injects flow velocity, makes the pressure in sample room and balance room reach 0.05MPa；The test process of the present invention is simple, quick, raw material dosage is few, reproducible, compensate for the shortcoming that current mink cell focus can only rely on experience and software simulation to obtain at furnace outlet rate of gasification.
(3) 30 DEG C/min of heating rate and the final temperature 600 DEG C of thermogravimetric analyzer are set, balance school zero, thermogravimetric analyzer begins to warm up intensification, and thermogravimetric analyzer is automatically recorded in temperature-rise period simultaneously, the continuous Weight loss data that sample produces because of the gasification of light component；
(4) using data weightless continuously for gasification as vertical coordinate, sample cell temperature, as abscissa, makes curve chart, as it is shown in figure 1, can obtain on curve under specific ramp rate conditions, and mink cell focus sample gas rate corresponding under different temperatures；
(5) with 10 DEG C/min, 15 DEG C/min, 20 DEG C/min, 25 DEG C/min, 30 DEG C/min, 35 DEG C/min, 40 DEG C/min, 45 DEG C/min, the heating rate of 50 DEG C/min carries out mink cell focus sample gas rate respectively and measures, with above-mentioned different heating rate for abscissa, sample gas rate corresponding at furnace outlet temperature is vertical coordinate, matched curve trendgram is made according to principle of least square method, matched curve in trendgram is extended to high intensification rate field, according to trendgram, the heavy oil gasifying rate that mink cell focus specific heating rate at furnace outlet temperature is corresponding can be obtained.
Embodiment one
When 0.05MPa, with 10 DEG C/min, 15 DEG C/min, 20 DEG C/min, 25 DEG C/min, 30 DEG C/min, 35 DEG C/min, 40 DEG C/min, 45 DEG C/min, 50 DEG C/min is for heating rate, record heavy oil gasifying rate 450 DEG C corresponding, exponential function (y=174.63*exp (-x/700.78)-123.18) is selected to be fitted, obtain matched curve trendgram, as shown in Figure 2.Heating furnace inlet temperature is 360 DEG C, it is 40s to the time of staying that furnace tubing exports that boiler tube designing requirement enters furnace tubing from mink cell focus, for making heater outlet temperature reach 450 DEG C, heating rate needs to reach 135 DEG C/min, by the trend curve in Fig. 2, the heavy oil gasifying rate that can obtain corresponding 135 DEG C/min of heating rate is 22.4%.
Embodiment two
When 0.05MPa, with 10 DEG C/min, 15 DEG C/min, 20 DEG C/min, 25 DEG C/min, 30 DEG C/min, 35 DEG C/min, 40 DEG C/min, 45 DEG C/min, 50 DEG C/min is for heating rate, record heavy oil gasifying rate 400 DEG C corresponding, exponential function (y=-470.46*exp (-X/-1523.73)+510.81) is selected to be fitted, obtain matched curve trendgram, as shown in Figure 3.Heating furnace inlet temperature is 360 DEG C, it is 40s to the time of staying that furnace tubing exports that boiler tube designing requirement enters furnace tubing from mink cell focus, for making heater outlet temperature reach 400 DEG C, heating rate needs to reach 60 DEG C/min, by the trend curve in Fig. 3, the heavy oil gasifying rate that can obtain corresponding 60 DEG C/min of heating rate is 18.8%.
Finally should be noted that; above example is only in order to illustrate technical scheme; but not limiting the scope of the invention; although having made to explain to the present invention with reference to preferred embodiment; it will be understood by those within the art that; technical scheme can be modified or equivalent replacement, without deviating from the spirit and scope of technical solution of the present invention.
Claims (7)
1. mink cell focus is at an assay method for furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate, it is characterized in that, comprises the steps:
(1) thermogravimetric analyzer preheating is opened, mink cell focus sample is joined in the sample cell of thermogravimetric analyzer, close heating jacket, and determine airtight, open vacuum pump to be bled the sample room of thermogravimetric analyzer, until pressure reaches setting value, being then charged with nitrogen, repeated several times is to guarantee in sample room without air residual；
(2) nitrogen of the sample room and balance room that regulate thermogravimetric analyzer injects flow velocity, makes the pressure in sample room and balance room reach setting value；
(3) arranging heating rate and the final temperature of thermogravimetric analyzer, balance school zero, thermogravimetric analyzer begins to warm up intensification, and thermogravimetric analyzer is automatically recorded in temperature-rise period simultaneously, the continuous Weight loss data that sample produces because of the gasification of light component；
(4) using data weightless continuously for gasification as vertical coordinate, sample cell temperature, as abscissa, makes curve chart, can obtain under specific ramp rate conditions on curve, mink cell focus sample gas rate corresponding under different temperatures；
(5) carry out mink cell focus sample gas rate respectively to measure with different heating rates, with above-mentioned different heating rate for abscissa, sample gas rate corresponding at furnace outlet temperature is vertical coordinate, make matched curve trendgram, matched curve in trendgram is extended to high intensification rate field, according to trendgram, the heavy oil gasifying rate that mink cell focus specific heating rate at furnace outlet temperature is corresponding can be obtained.
2. a kind of mink cell focus as claimed in claim 1 is at the assay method of furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate, it is characterized in that, in described step (1), the time of preheating is two hours.
3. a kind of mink cell focus as claimed in claim 1 is at the assay method of furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate, it is characterized in that, in described step (1), mink cell focus amount of samples is 5mg.
4. a kind of mink cell focus as claimed in claim 1 is at the assay method of furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate, it is characterized in that, in described step (2), the setting value of pressure is 0.05MPa.
5. a kind of mink cell focus as claimed in claim 1 is at the assay method of furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate, it is characterized in that, the final temperature arranging thermogravimetric analyzer in described step (3) is 600 DEG C.
6. a kind of mink cell focus as claimed in claim 1 is at the assay method of furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate, it is characterized in that, heating rates different in described step (5) respectively 10 DEG C/min, 15 DEG C/min, 20 DEG C/min, 25 DEG C/min, 30 DEG C/min, 35 DEG C/min, 40 DEG C/min, 45 DEG C/min, 50 DEG C/min.
7. a kind of mink cell focus as claimed in claim 1 is at the assay method of furnace outlet temperature therapeutic method to keep the adverse QI flowing downwards rate, it is characterized in that, in described step (5), matched curve obtains according to principle of least square method.
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| CN113063695A (en) * | 2021-03-24 | 2021-07-02 | 中国石油化工股份有限公司 | Method and device for measuring gasification rate of heavy oil |
| CN113447389A (en) * | 2021-06-18 | 2021-09-28 | 营口理工学院 | Method for determining activation energy of carbon steel in solidification process by adopting non-linear equal-conversion-rate method |
| CN115855737A (en) * | 2023-02-28 | 2023-03-28 | 国网辽宁省电力有限公司 | Insulating material thermal gravimetric analyzer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107677763A (en) * | 2017-10-12 | 2018-02-09 | 国网河北能源技术服务有限公司 | One kind simulation coal dust firing and flue gas pollutant generation test system and method |
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| CN115855737A (en) * | 2023-02-28 | 2023-03-28 | 国网辽宁省电力有限公司 | Insulating material thermal gravimetric analyzer |
| CN115855737B (en) * | 2023-02-28 | 2023-04-28 | 国网辽宁省电力有限公司 | Insulating material thermogravimetric analyzer |
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Inventor after: Chen Kun Inventor after: Dai Yang Inventor after: Xia Wei Inventor after: Xue Wangyang Inventor after: Song Zhengda Inventor after: Kong Dehui Inventor after: Liu He Inventor after: Wang Zongxian Inventor after: Guo Aijun Inventor before: Chen Kun Inventor before: Li Zhenfang Inventor before: Zhao Xiangkun Inventor before: Gong Liming Inventor before: Song Zhengda Inventor before: Kong Dehui Inventor before: Xia Wei Inventor before: Yu Chuanrui Inventor before: Tang Yiqiang Inventor before: Mu Jun Inventor before: Feng Shuangqing Inventor before: Ni Peng Inventor before: Zhao Na Inventor before: Li Daoyi Inventor before: Shi Yan Inventor before: Shao Shuai Inventor before: Lu Fazhang Inventor before: Zhang Junlei Inventor before: Wang Lukai Inventor before: Wang Zongxian Inventor before: Guo Aijun Inventor before: Liu Hao Inventor before: Lin Cunhui Inventor before: Liu Xu Inventor before: Sun Shengnan Inventor before: Zhang Di Inventor before: Liu He Inventor before: Fan Shiguang Inventor before: Liu Chaoxian Inventor before: Jiao Shouhui Inventor before: Gong Xu Inventor before: Wang Junjie |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |