32 results about "Atmospheric column" patented technology

The invention provides a process for synthesizing n-butyl acetate, in particular relates to a novel process for synthesizing n-butyl acetate by utilizing a pressure-difference thermal-coupling reaction rectification column. The process device comprises a pressure-difference thermal-coupling reaction rectification column atmospheric column, a vacuum column, a compressor, a heat exchanger, a pump and a phase separator. Raw materials n-butyl alcohol and acetic acid perform an esterification reaction in the vacuum column reaction section of the pressure-difference thermal-coupling reaction rectification column to generate the n-butyl acetate, the compressor is arranged between the vacuum column and the atmospheric column, steam extracted from the top of the vacuum column is pressurized through the compressor and enters the bottom of the atmospheric column, a reboiler at the bottom of the vacuum column is heated by potential heat of the steam at the top of the atmospheric column to perform thermal coupling between two columns, so that great energy-saving in the rectification process can be realized, the advantages of the pressure-difference thermal-coupling rectification column and a reaction rectification column can be played sufficiently, the esterification reaction and refining of the target product can be realized at the same time. According to the process, over 97 percent of acetic acid and over 99 mass percent of the high-purity product can be obtained.

The invention discloses a method for producing naphtha, diesel oil and lubricant base oil by using used lubrication oil. The method mainly comprises the following steps of distilling the used lubrication oil in an atmospheric column and a vacuum tower; hydrofining through a hydrogenation reactor; rectifying in a rectifying column; and finally discharging the naphtha from the top of the rectifying column, discharging the diesel oil from the side line, and discharging the lubricant base oil from the bottom part. The method also comprises the step of preprocessing the used lubrication oil in early stage, wherein the step specifically comprises the following substeps: adding the used lubrication oil into a flocculation sedimentation tank to perform sedimentation, carrying out secondary sedimentation on the used lubrication oil in a raw material buffering tank after most of water content and impurities are removed in the flocculation sedimentation tank, and finally transferring the used lubrication oil from the raw material buffering tank into an atmospheric distillation column after the water content and impurities are removed by the secondary sedimentation. According to the method, the water content and impurities in the used lubrication oil are basically removed by two-times sedimentation, and thus trays of the atmospheric distillation column and a pressure-reduced distillation column cannot be blocked, long-term continuous production can be realized, and the production efficiency can be improved.

Systems may methods may be provided for determining turbulent mixing characteristics. The systems and methods may include obtaining sounding data associated with an atmospheric column and determining first vertical potential temperature profiles from the sounding data. The systems and methods may further include determining second vertical profiles of displacement scales based at least in part on the first vertical potential temperature profiles, and determining turbulent mixing characteristics in the atmospheric column based at least in part on the displacement scales.

The invention relates to the technical field of chemical industry, and more specifically relates to a method for reducing metal ion content and particle size by N-methylpyrrolidone. The method comprises the following steps: after adding monomethylamine and γ-butyrolactone into the reactor for reaction, passing through an atmospheric tower to remove water and monomethylamine, and the obtained crude product enters a negative pressure tower to remove low boiling, and then passes through a rectification tower After removing the high boiling point, it enters the storage tank, and after flowing out from the storage tank, it passes through the primary filter, the secondary filter and the tertiary filter, and then goes through the dust-free filling line to obtain ultra-high-purity N-methylpyrrolidone . The invention provides a method for reducing metal ion content and particle size of N-methylpyrrolidone, the purity of the obtained ultra-high-purity N-methylpyrrolidone can reach 99.90% and above, and the particle size of impurity particles is greater than 0.5 μm The content is less than or equal to 5 pieces / mL, and products with low particle size can be obtained while meeting high purity.

The invention discloses a ground surface temperature inversion method based on mid-infrared and thermal infrared data. The steps include: 1) simulating the cloud top brightness temperature of mid-infrared and thermal infrared channels under different combination conditions of atmosphere, surface and observation angles, and generating simulated Data set; 2) Divide the simulated data in the simulated data set into several sub-intervals according to the water vapor content of the atmospheric column, the cloud top brightness temperature and the observation angle; 3) Combining the principle of the split window algorithm to construct the surface temperature reflections of the daytime data and nighttime data respectively 4) Using the surface temperature inversion algorithm of daytime data and the surface temperature inversion algorithm of nighttime data to calculate the actual remote sensing image to be processed, according to the water vapor content of each pixel of the actual remote sensing image, cloud top brightness temperature and observation angle Select the corresponding surface temperature inversion algorithm coefficients for the corresponding sub-intervals, and then combine the surface classification products to obtain the surface emissivity of the actual remote sensing image, and obtain the surface temperature inversion results. The invention can acquire high-precision ground surface temperature.

The invention provides a process for synthesizing n-butyl acetate, in particular relates to a novel process for synthesizing n-butyl acetate by utilizing a pressure-difference thermal-coupling reaction rectification column. The process device comprises a pressure-difference thermal-coupling reaction rectification column atmospheric column, a vacuum column, a compressor, a heat exchanger, a pump and a phase separator. Raw materials n-butyl alcohol and acetic acid perform an esterification reaction in the vacuum column reaction section of the pressure-difference thermal-coupling reaction rectification column to generate the n-butyl acetate, the compressor is arranged between the vacuum column and the atmospheric column, steam extracted from the top of the vacuum column is pressurized through the compressor and enters the bottom of the atmospheric column, a reboiler at the bottom of the vacuum column is heated by potential heat of the steam at the top of the atmospheric column to perform thermal coupling between two columns, so that great energy-saving in the rectification process can be realized, the advantages of the pressure-difference thermal-coupling rectification column and a reaction rectification column can be played sufficiently, the esterification reaction and refining of the target product can be realized at the same time. According to the process, over 97 percent of acetic acid and over 99 mass percent of the high-purity product can be obtained.

The invention discloses a dehydration corrosion prevention device of overhead equipment. The dehydration corrosion prevention device comprises an atmospheric column, an air cooler and a return tank. An inlet of the air cooler is communicated with the top of the atmospheric column through a distillate outlet pipe. An outlet of the air cooler is communicated with the return tank through a fluid conveying pipe. A drying dehydrator is connected to the distillate outlet pipe in series. A delivery pump located between the drying dehydrator and the air cooler is further connected to the distillate outlet pipe in series. The atmospheric column is simple in structure, capable of preventing HCl and H2S from accumulating on the pipes, the air cooler, a condenser and the wall of the return tank and good in corrosion prevention effect.

The invention relates to an SST inversion method and system based on Landsat 8 data. The method comprises that Landsat 8 optical and thermal-infrared remote sensing images and corresponding atmospheric contour data are read; on the basis of water-body and seawater emissivity data and a spectral response function of a Landsat 8 TIRS (Thermal Infrared Sensor), the atmospheric contour is used for driving, and channel brightness temperatures in the aerosphere top of two channels of the TIRS under different combined conditions of atmospheric conditions, SSTs and emissivities are simulated; and the obtained total atmospheric column water vapor content is used to divide the atmospheric column water vapor content into intervals, a split-window algorithm is used to construct SST inversion algorithms of the different water vapor content intervals, the SST is calculated, and a result is output. The system comprises a remote-sensing image reading module, an atmospheric water vapor data reading data, a data processing module and an SST inversion module. The system and method can be used to obtain high-precision SST.

The invention relates to a crude oil distillation device, belonging to the technical field of oil refining. The crude oil distillation device comprises an atmospheric column, an atmospheric overhead oil circulating device, a cooling device and a product tank, wherein a plurality of column trays are arranged in the atmospheric column at intervals along the height direction; and the straight-run oil circulating device comprises an oil-gas conveying pump and an atmospheric overhead heat exchanger, the oil-gas conveying pump is communicated with an inner cavity of the atmospheric column, the atmospheric overhead heat exchanger is communicated with the oil-gas conveying pump, the tray located at the topmost position is communicated with the atmospheric overhead heat exchanger, and the tray located at the topmost position, the cooling device and the product tank are sequentially communicated. According to the crude oil distillation device, cold reflux circulation of the column top of the atmospheric column is omitted based on the prior art, so that the low-temperature effect caused by cold reflux can be effectively avoided, and corrosive substances in the atmospheric column can be reduced; and meanwhile, the under-deposit corrosion caused by revaporization of water is avoided, so that the normal working of the atmospheric column is guaranteed, the service life of the atmospheric column is prolonged, and the defects in the prior art are effectively made up.

The invention is a method for separating benzene and isobutanol azeotrope by pressure swing rectification and a device suitable for the method. The device mainly includes: atmospheric column LP, pressurized column HP, condensers C1 and C2, reflux tanks D1 and D2, reboilers R1 and R2; wherein reboilers R1 and R2 are respectively connected to the atmospheric column LP and the The bottom of the pressure column HP, the condenser C1 and the reflux tank D1 are sequentially connected to the top of the atmospheric column LP, and the condenser C2 and the reflux tank D2 are sequentially connected to the top of the pressurization column HP. The method for separating the azeotrope system of benzene and isobutanol by pressure swing rectification has two column sequences, that is, sequence one: the lowest azeotrope is separated in the atmospheric column first, and the highest azeotrope is separated in the high pressure column, sequence two : The highest azeotrope is separated in the high pressure column first, and then the lowest azeotrope is separated in the atmospheric pressure column. The invention solves the separation problem brought about by the azeotropic behavior of the system showing the lowest and highest characteristics respectively as the pressure rises, and has the advantages of low energy consumption and high product recovery rate.

The invention provides a method and a device for obtaining a cloud water path. The method comprises the following steps: selecting at least one target region; obtaining space-time continued three-dimensional cloud water fields corresponding to each target region, wherein the three-dimensional cloud water fields are used for describing cloud water content corresponding to cloud in the vertical space corresponding to the target regions; obtaining at least one target atmospheric column in each three-dimensional cloud water field; and carrying out vertical integration on the cloud water content ofcloud in each target atmospheric column so as to obtain the cloud water path of the target atmospheric column. In order to obtain the cloud water path, an obtaining strategy for the related three-dimensional cloud water fields is also disclosed, according to the method for obtaining the cloud water path provided by the invention, the space-time continued cloud water content three-dimensional distribution result can be obtained on the basis of obtaining the three-dimensional cloud water fields, which is unavailable for conventional and special observation.

The invention relates to a laboratory testing method for atmospheric transmissivity of multi-band light radiation. The laboratory testing method comprises the following steps that radiation light is generated by a radiation light source device, and converted into parallel sine radiation light; the sine radiation light radiates into the front of a simulated atmosphere column transmission attenuation device and radiates out from the back of the simulated atmosphere column transmission attenuation device; the simulated atmosphere column transmission attenuation device comprises a seal pot filled with at least one kind of compressed gas to be tested; optical windows are arranged at the front and the back of the seal pot; the compressed gas to be tested is a certain gas in the atmosphere, which is compressed into the seal pot, has the same sectional area as that of the seal pot, and is within a certain length range; and data collection and analytical processing are conducted on the sine radiation light attenuated by the simulated atmosphere column transmission attenuation device. Under a laboratory environment, the laboratory testing method for the atmospheric transmissivity of the multi-band light radiation can simulate the testing of attenuation coefficients of ultraviolet light radiation, visible light radiation and infrared light radiation in the atmospheric transmission through a compressed air column, and is simple and convenient.

The invention relates to a method for separating low-concentration dimethyl carbonate during a process of synthesizing dimethyl oxalate with coal-based synthetic gas as a raw material. The invention mainly aims at solving the problems of complicated operation and high energy consumption of prior arts. According to the invention, a crude methanol solution containing small amounts of dimethyl carbonate and methyl formate is delivered to a light component removing column, such that methyl formate is removed; the obtained material is delivered to a double-column process composed of atmospheric column-pressurized column, such that dimethyl carbonate is removed through separation, and methanol can be recovered and recycled. A large proportion of pressurized column overhead gas is adopted as a heat source for a light component removing column kettle reboiler. With the technical scheme, the problems are well solved. The method can be used in ethylene glycol industrial productions.

The invention discloses an atmospheric correction method for the infrared channel of a common-aperture high-orbit remote sensing satellite: (1), constructing a high-orbit thermal infrared split window atmospheric water vapor inversion model, and calculating and obtaining the atmospheric column water vapor content W of the image coverage area at the time of satellite imaging; (2), according to the atmospheric correction coefficients of the visible-near-infrared channels of high-orbit remote sensing satellites under different imaging conditions and atmospheric conditions, form an atmospheric correction coefficient lookup table; (3), retrieve the atmospheric correction coefficient lookup table, and obtain the atmospheric correction coefficient , and calculate the satellite visible-near-infrared channel surface reflectance accordingly, and complete the atmospheric correction in the visible-near-infrared band; (4), calculate the thermal infrared absorption channel B 11 and through channel B 12 Atmospheric transmittance τ 11 and τ 12 (5) Using the thermal infrared split window surface temperature inversion model to complete the inversion of the surface temperature and obtain the surface temperature. This method can improve the quality of satellite images and the accuracy of remote sensing observation of surface radiation and reflection.

The invention relates to a hydrotreating process for sulfur-containing / high-sulfur crude oil, belonging to the technical fields of petroleum processing and petrochemical industry. In the pre-hydrodesulfurization process of the sulfur-containing / high-sulfur crude oil of the present invention, the crude oil is desulfurized through a pre-hydrodesulfurization reaction unit before the atmospheric tower. The invention is especially suitable for upgrading and transforming an established petroleum refining enterprise, and transforming the existing equipment in the original factory, thereby saving the investment cost. After pre-hydrodesulfurization treatment, the sulfur content of the whole fraction is reduced, which greatly reduces the desulfurization pressure of the subsequent crude oil processing unit, and the intermediate product can be directly sent to the downstream deep processing unit without additional treatment.

The invention discloses a process for performing normal vacuum distillation on light crude oil, which comprises the step of cutting the light crude oil into various oil distillates after forerunning, atmospheric distillation and vacuum distillation, wherein in the forerunning process, the feed temperature of a primary tower is controlled between 235 and 247 DEG C; and in the atmospheric distillation, the load of a normal primary reboiler is controlled between 1.8 and 2.1 MMkal / hr, the secondary steam stripping steam quantity is controlled between 525 and 575 Kg / hr, and the heat removal ratio of the tower top to the top circulation to the first middle part to the second middle part of an atmospheric column is equal to 1:2.2-2.5:3.2-4.2 : 4.6-5.2. The process can meet the requirements on processing the mixed raw oil containing a lot of light oil, in particular the mixed raw oil of which the yield of distillate oil is not less than 52 percent of that of the light oil before the temperature reaches 360 DEG C. The upper separation effect of the atmospheric column becomes good, and the quality of the main product is guaranteed. The processing quantity of the crude oil can reach 7.50 to 8.50 million tons per year, the yield of naphtha is not less than 1.00 million ton per year, and the yield of wax is at least 0.18 million ton per year. The main devices are not changed to save the investment greatly. In the process of adjustment, the work is not necessary to be stopped so that the process has the characteristic of easy operation, and can meet the requirement on long period of running.

The invention discloses a dehydration corrosion prevention device of overhead equipment. The dehydration corrosion prevention device comprises an atmospheric column, an air cooler and a return tank. An inlet of the air cooler is communicated with the top of the atmospheric column through a distillate outlet pipe. An outlet of the air cooler is communicated with the return tank through a fluid conveying pipe. A drying dehydrator is connected to the distillate outlet pipe in series. A delivery pump located between the drying dehydrator and the air cooler is further connected to the distillate outlet pipe in series. The atmospheric column is simple in structure, capable of preventing HCl and H2S from accumulating on the pipes, the air cooler, a condenser and the wall of the return tank and good in corrosion prevention effect.

The invention discloses an inversion method of laser radar slant visibility, and the specific steps include: 1) using laser radar detection and inversion to obtain atmospheric aerosol optical parameters, microphysical parameters and atmospheric scattering characteristics on the slant path at different wavelengths The profile of the atmospheric radiative transfer equation provides real-time and accurate atmospheric input parameters for the solution of the atmospheric radiative transfer equation; 2) input the obtained atmospheric input parameters into the SBDART calculation software to obtain the luminance of the atmospheric column on the slope path; 3) use the 4) Determine the inherent contrast between the target and the background; 5) Use the functional relationship between the contrast transfer coefficient and the slope optical thickness and the inherent relationship between the target and the background In contrast, the numerical method accurately solves the distribution of slope visibility at different heights, and determines the atmospheric slope visibility value; it solves the problem of inaccurate daytime slope visibility distance measurement results existing in the prior art.