CN218345386U - Device for removing oxygen-containing compounds in Fischer-Tropsch synthetic oil - Google Patents
Device for removing oxygen-containing compounds in Fischer-Tropsch synthetic oil Download PDFInfo
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Abstract
The utility model relates to the field of chemical equipment, and provides a device for removing oxygen-containing compounds in Fischer-Tropsch synthetic oil, which comprises a raw material tank, a metering pump, a fixed bed adsorption column and a product tank; the head tank is connected with the inlet of a metering pump, the inlet of the metering pump is connected with the bottom of a fixed bed adsorption column, an activated alumina adsorbent is arranged in the fixed bed adsorption column, and the top of the fixed bed adsorption column is connected with a product tank. The device can realize the desorption of trace oxygen-containing compounds in the Fischer-Tropsch synthetic oil. The device is simple to operate and high in practicability.
Description
Technical Field
The utility model relates to a chemical industry equipment field particularly, relates to a device of oxygen-containing compound in desorption ft synthetic oil.
Background
With the rapid development of the coal chemical industry in China, the yield of the Fischer-Tropsch synthetic wax is rapidly increased. At present, the capacity of coal indirect oil production reaches 700 ten thousand tons per year, and the Fischer-Tropsch synthesis technology becomes a new and important economic growth point in the chemical field. The Fischer-Tropsch synthesis light oil (Fischer-Tropsch synthesis oil for short) is mainly distributed in C5-C19, wherein the alkane content is about 45wt% (mass fraction), the olefin content is more than 50wt%, and the oxygen-containing compound content is about 5 wt%. The olefin contains more than 95wt% of linear alpha-olefin, and the oxygen-containing compound mainly comprises organic acid, alcohol, aldehyde, ketone, ester, etc. with various carbon numbers. The Fischer-Tropsch synthetic oil has high alpha-olefin and straight-chain alkane content and low octane number, is not suitable for being directly sold as gasoline and diesel oil, but is suitable for being used as a raw material for producing the alpha-olefin, and has huge cost advantage compared with the raw material of a petroleum route. The alpha-olefin is mainly used for preparing high-grade polyolefin materials, poly alpha-olefin (PAO) total synthetic lubricating oil, top-grade surfactant and other various high value-added materials. In the PAO production process, oxygen-containing compounds such as alcohol, aldehyde, ketone and the like in the Fischer-Tropsch synthetic oil can generate complexation or substitution reaction with Lewis acid catalysts used in the polymerization process, so that part of the catalysts are poisoned and inactivated, and the properties such as oxidation stability and the like of the lubricating oil base oil can be influenced to different degrees. The method has the advantages that the raw material alpha-olefin is subjected to necessary pretreatment, oxygen-containing compounds harmful to the stability of the catalyst and the product are removed, and the method has very important significance for improving the economic benefit and the product quality of the PAO product. Therefore, the separation and purification of the linear alpha-olefin in the Fischer-Tropsch synthesis oil are carried out, and the removal of acid and oxygen-containing compounds in the Fischer-Tropsch synthesis oil is firstly carried out. At present, the removal of oxygen-containing compounds in oil mainly comprises a hydrofining method, an azeotropic distillation method, a solvent extraction method and an adsorption method. The hydrogenation method is accompanied with olefin hydrogenation saturation while removing oxygen-containing compounds, and has poor applicability to olefin-containing materials. Because the hydrocarbon and the oxygen-containing compound can form an azeotrope, when the rectification method is adopted, the extraction rectification and the azeotropic rectification are needed to remove the oxygen-containing compound, so that the problems of high energy consumption, large equipment investment and the like exist. Solvent extraction processes can reduce the oxygenate content to a low level, but cannot completely remove it. The adsorption method is suitable for completely removing the trace oxygen-containing compounds.
In view of this, the present application is specifically proposed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an oxygenate's in desorption ft synthetic oil device.
The embodiment of the utility model is realized like this:
in a first aspect, the utility model provides a device for removing oxygen-containing compounds in Fischer-Tropsch synthetic oil, which comprises a raw material tank, a metering pump, a fixed bed adsorption column and a product tank;
the head tank is connected with the inlet of a metering pump, the inlet of the metering pump is connected with the bottom of a fixed bed adsorption column, an activated alumina adsorbent is arranged in the fixed bed adsorption column, and the top of the fixed bed adsorption column is connected with a product tank.
In an alternative embodiment, a back pressure valve is provided on the connecting line between the fixed bed adsorption column and the product tank.
In an alternative embodiment, the apparatus further comprises a nitrogen storage tank connected to the top of the fixed bed adsorption column.
In an optional embodiment, the apparatus further comprises an adsorption column heater disposed on a sidewall of the fixed bed adsorption column for heating the fixed bed adsorption column.
In an optional embodiment, the device comprises a water storage tank, the water storage tank is connected with the top of the fixed bed adsorption column, the water storage tank is connected with an inlet of a metering pump, an outlet of the metering pump is connected with the top of the fixed bed adsorption column, and a first heater for heating water into steam is arranged on a pipeline connecting the outlet of the metering pump and the top of the fixed bed adsorption column.
In an alternative embodiment, the apparatus includes a recovery water storage tank in communication with the bottom of the fixed bed adsorption column.
In an alternative embodiment, the apparatus further comprises an air storage tank connected to the top of the fixed bed adsorption column; and a second heater is arranged on a pipeline connecting the air storage tank and the fixed bed adsorption column.
In an alternative embodiment, the apparatus further comprises a temperature controller communicatively coupled to the first heater, the sorption column heater, and the second heater.
In an alternative embodiment, the fixed bed adsorption column has a height of 0.5 to 0.7m, an outer diameter of 15 to 18mm and an inner diameter of 10 to 13mm.
The embodiment of the utility model provides a beneficial effect is:
when the device is used, the Fischer-Tropsch synthetic oil is stored in the raw material tank, the metering pump is started, the Fischer-Tropsch synthetic oil is pumped into the fixed bed adsorption column from the bottom of the fixed bed adsorption column, oil passes through the alumina adsorbent, under the adsorption action of the adsorbent, trace oxygen-containing compounds contained in the oil are adsorbed, and the oil after dynamic adsorption flows out of the top of the adsorption column and enters the product tank; sampling the outlet oil product of the fixed bed adsorption column, measuring the carbonyl content by adopting an ultraviolet spectrophotometer, and stopping adsorption when the outlet oil product contains carbonyl, namely, the adsorption column is penetrated.
The device provided by the utility model can realize the desorption to micro oxygen compound in the ft synthetic oil. The device is simple to operate, low in energy consumption, small in equipment investment and high in practicability, and can remove trace oxygen-containing compounds in the Fischer-Tropsch synthetic oil by an adsorption method and basically realize complete removal of the oxygen-containing compounds.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a device for removing oxygen-containing compounds from Fischer-Tropsch synthesis oil provided by the embodiment of the invention.
1-a device for removing oxygen-containing compounds in Fischer-Tropsch synthetic oil; 2-a raw material tank; 3-a metering pump; 4-an adsorption column; 5-back pressure valve; 6-nitrogen storage tank; 7-a recycled water storage tank; 8-a water storage tank; 9-a first heater; 10-a product tank; 12-an air reservoir; 13-an adsorption column heater; 14-a second heater; 15-temperature controller.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, fig. 1 is a schematic structural diagram of the apparatus for removing oxygen-containing compounds from fischer-tropsch synthesis oil provided in this embodiment, in which the connection between units is implemented as a pipeline, and the dotted line is an electrical signal transmission line. The embodiment of the application provides a device 1 for removing oxygen-containing compounds in Fischer-Tropsch synthetic oil, which comprises a raw material tank 2, a metering pump 3, a fixed bed adsorption column 4 and a product tank 10;
the feed tank 2 is connected with the inlet of the metering pump 3, the inlet of the metering pump 3 is connected with the bottom of the fixed bed adsorption column 4, the activated alumina adsorbent is arranged in the fixed bed adsorption column 4, and the top of the fixed bed adsorption column 4 is connected with the product tank 10.
When the device is used, the Fischer-Tropsch synthesis oil is stored in the raw material tank 2, the metering pump 3 is started, the Fischer-Tropsch synthesis oil is pumped into the fixed bed adsorption column 4 from the bottom of the fixed bed adsorption column 4, when an oil product passes through an alumina adsorbent, under the adsorption action of the adsorbent, a trace amount of oxygen-containing compounds contained in the oil product are adsorbed, and the oil product after dynamic adsorption flows out of the top of the adsorption column 4 and enters the product tank 10; sampling the outlet oil product of the fixed bed adsorption column 4, measuring the carbonyl content by adopting an ultraviolet spectrophotometer, and stopping adsorption when the outlet oil product contains carbonyl, namely, the adsorption column 4 is penetrated.
Therefore, the device 1 for removing the oxygen-containing compounds in the Fischer-Tropsch synthetic oil provided by the embodiment of the application can be used for removing trace oxygen-containing compounds in the Fischer-Tropsch synthetic oil. The device is simple to operate, low in energy consumption, small in equipment investment and high in practicability, and can remove trace oxygen-containing compounds in Fischer-Tropsch synthetic oil by an adsorption method and basically realize complete removal of the oxygen-containing compounds.
Preferably, the apparatus further comprises an adsorption column heater 13, and the adsorption column heater 13 is disposed on a side wall of the fixed bed adsorption column 4 and used for heating the fixed bed adsorption column 4.
Normally, the activated alumina adsorbent can adsorb trace oxygen-containing compounds in the fischer-tropsch synthetic oil at normal temperature, but if the adsorption efficiency is improved, the adsorption column 4 can be heated, and when the adsorption process is performed at a slightly higher temperature, the adsorption column heater 13 can be started to heat the fixed bed adsorption column 4.
Preferably, a back pressure valve 5 is provided on a connection line between the fixed bed adsorption column 4 and the product tank 10.
In the adsorption treatment process of the Fischer-Tropsch synthetic oil, if the treatment is pressurization treatment, the backpressure valve 5 is adjusted while feeding, so that the system reaches the target pressure.
Preferably, the device 1 for removing the oxygen-containing compounds in the Fischer-Tropsch synthesis oil further comprises a nitrogen storage tank 6, and the nitrogen storage tank 6 is connected with the top of the fixed bed adsorption column 4.
When the adsorption column 4 is saturated, the adsorbent in the adsorption column 4 needs to be treated, before the adsorbent is treated, the nitrogen storage tank 6 is communicated with the top of the fixed bed adsorption column 4, and nitrogen enters the fixed bed adsorption column 4 to discharge the Fischer-Tropsch synthetic oil removed from the adsorption column 4. In this process, the raw material tank 2 may be connected to the bottom of the fixed bed adsorption column 4, and the nitrogen gas may return the fischer-tropsch synthesis oil discharged from the fixed bed adsorption column 4 to the raw material tank 2.
Preferably, the device 1 for removing oxygen-containing compounds from fischer-tropsch synthetic oil comprises a water storage tank 8, wherein the water storage tank 8 is connected with the top of the fixed bed adsorption column 4, the water storage tank 8 is connected with an inlet of the metering pump 3, an outlet of the metering pump 3 is connected with the top of the fixed bed adsorption column 4, and a first heater 9 for heating water into steam is arranged on a pipeline connecting the outlet of the metering pump 3 and the top of the fixed bed adsorption column 4.
When the water storage tank 8 and the first heater 9 are included in the apparatus, the regeneration of the alumina adsorbent by the steam can be realized. Through measuring pump 3 with water from water storage tank 8 pump, when rivers through the first heater 9 that sets up on the pipeline, by heating gasification formation vapor, vapor gets into adsorption column 4 from adsorption column 4's top, and the bottom flows out, and adsorption column heater 13 heats adsorption column 4 at this in-process, makes adsorption column 4 temperature rise to the required temperature of aluminium oxide adsorbent regeneration, and vapor flows out from adsorption column 4's bottom.
Preferably, the device 1 for removing the oxygen-containing compounds in the Fischer-Tropsch synthesis oil comprises a recovery water storage tank 7, and the recovery water storage tank 7 is communicated with the bottom of the fixed bed adsorption column 4.
The water vapor discharged from the fixed bed adsorption column 4 is condensed by a pipeline and sent to a recovered water storage tank 7 for storage.
Preferably, the device 1 for removing oxygen-containing compounds from fischer-tropsch synthesis oil further comprises an air storage tank 12, the air storage tank 12 is connected with the top of the fixed bed adsorption column 4, and a second heater 14 is arranged on a pipeline connecting the air storage tank 12 and the fixed bed adsorption column 4.
When the apparatus includes an air reservoir 12 and a second heater 14, regeneration of the alumina adsorbent by air heating can be achieved. When the alumina adsorbent is regenerated by heating air, relevant units and pipelines for regenerating the alumina adsorbent by using water vapor are closed, the air is discharged from the top of the fixed bed adsorption column 4 and is preheated by a second heater 14 arranged on the pipeline before entering the fixed bed adsorption column 4, the adsorption column 4 is also heated by the adsorption column heater 13 in the regeneration process, so that the temperature in the adsorption column 4 is raised, and oxygen-containing organic matters adsorbed on the alumina adsorbent are combusted and decomposed by the high-temperature air and are discharged together with the air. After the regeneration is completed, the nitrogen gas from the nitrogen gas storage tank 6 enters from the top of the adsorption column 4 and flows out from the bottom thereof, and the adsorption column 4 is subjected to gas replacement and cooling.
Preferably, the air storage tank 12 and the nitrogen storage tank 6 are respectively connected to the same pipeline through different corresponding pipelines to be connected with the top of the adsorption column 4, and the second heater 14 is arranged on the same pipeline, so that the second heater 14 can heat the passing nitrogen besides heating the air.
Preferably, the device 1 for removing the oxygen-containing compounds from the fischer-tropsch synthesis oil further comprises a temperature controller 15, and the temperature controller 15 is in communication connection with the first heater 9, the adsorption column heater 13 and the second heater 14, and is used for automatically controlling the heating temperature of each heater.
The utility model discloses still provide and utilize the utility model provides a desorption method that device 1 of desorption oxygen compound in the ft synthetic oil carries out micro oxygen compound in the ft synthetic oil to and the regeneration method of adsorbent. The method comprises the following specific steps:
1. the method for removing the trace compounds comprises the following steps:
taking white spherical particles, and activating the alumina adsorbent with the performance meeting the requirement of HG/T3927-2007 standard. There are two activation methods, one: and (3) putting the activated alumina particles into an adsorption column 4, heating for 3 hours by using nitrogen at 200 ℃, and then naturally cooling. And a second activation method: and (3) placing the activated alumina particles in a muffle furnace, heating for 3h at 450 ℃, and then naturally cooling.
The activated alumina adsorbent was loaded into a fixed bed adsorption column 4.
Pumping Fischer-Tropsch synthetic oil into a fixed bed adsorption column 4 through a metering pump 3, adsorbing a trace amount of oxygen-containing compounds contained in the oil under the adsorption action of an adsorbent when the oil passes through an alumina adsorbent, and enabling the oil after dynamic adsorption to flow out of the top of the adsorption column 4 and enter a product tank 10; sampling the outlet oil product of the fixed bed adsorption column 4, measuring the carbonyl content by adopting an ultraviolet spectrophotometer, and stopping adsorption when the outlet oil product contains carbonyl, namely the adsorption column 4 is saturated.
Adsorption conditions: the temperature is 10-60 ℃, such as 25 ℃; the pressure is 0.01 to 1.0MPa, such as 0.1MPa; the mass space velocity is 0.3-10 h -1 E.g. 1.0h -1 。
2. Adsorbent regeneration method
After the activated alumina is absorbed and penetrated, 100 percent regeneration can be realized by a water vapor regeneration method or an air on-line combustion regeneration method. The adsorption capacity of the activated alumina adsorbent can be completely recovered after regeneration, so that the activated alumina adsorbent can be repeatedly regenerated and utilized.
(1) Steam regeneration method
And (3) a water vapor regeneration process: nitrogen from the nitrogen storage tank 6 enters from the top of the adsorption column 4, the penetrated adsorption column 4 is drained, and oil products drained from the bottom of the column are recovered to the raw material tank 2; after the liquid drainage process is finished, feeding primary water from a water storage tank 8 into an adsorption column 4 through a metering pump 3, heating and vaporizing the water into steam through a first heater 9 in a conveying pipeline, wherein the steam enters from the top of the adsorption column 4, flows out from the bottom and enters a recovered water storage tank 7, and a temperature controller 15 controls an adsorption column heater 13 to heat the adsorption column 4 to a required regeneration temperature; after regeneration is finished, nitrogen from the nitrogen storage tank 6 enters from the top of the adsorption column 4, flows out from the bottom of the adsorption column 4, and replaces and cools the adsorption column 4.
Nitrogen gas drainage conditions: the temperature is 60-200 ℃, such as 100 ℃; the pressure is 0.01 to 1.0MPa, such as 0.1MPa; the volume space velocity is 100 to 2000h -1 E.g. 200h -1 (ii) a The time is 0.1 to 5 hours, such as 1.0 hour.
Steam regenerationThe raw conditions are as follows: the regeneration temperature is 100-300 ℃, such as 100 ℃; the regeneration pressure is 0.1-1.0 MPa, such as 0.1MPa; the mass consumption of the water vapor is 1 to 15 times, such as 5.0 times of the mass of the solid adsorbent; the mass airspeed of the water vapor is 0.1-2 h -1 E.g. 1.0h -1 (ii) a The nitrogen replacement temperature is 100-400 ℃, such as 300 ℃; the space velocity of the nitrogen displacement volume is 100 to 2000h -1 E.g. 200h -1 (ii) a The time is 0.5 to 5 hours, such as 2.0 hours.
(2) Air on-line combustion regeneration method
Air on-line combustion regeneration process: nitrogen from the nitrogen storage tank 6 enters from the top of the adsorption column 4, the penetrated adsorption column 4 is drained, and oil products drained from the bottom of the column are recovered to the raw material tank 2; after the liquid drainage process is finished, air from the air storage tank 12 enters from the top of the adsorption column 4 and flows out from the bottom; the second heater 14 is controlled by the temperature controller 15 to preheat the air in the conveying pipeline, and the adsorption column heater 13 is controlled to heat the adsorption column 4 to the required regeneration temperature; after regeneration is finished, nitrogen from the nitrogen storage tank 6 enters from the top of the adsorption column 4, flows out from the bottom of the adsorption column, and replaces and cools the adsorption column 4.
Nitrogen gas drainage conditions: the temperature is 60-200 ℃, such as 100 ℃; the pressure is 0.01 to 1.0MPa, such as 0.1MPa; the volume space velocity is 100 to 2000h -1 E.g. 200h -1 (ii) a The time is 0.1 to 5 hours, such as 1.0 hour.
Air on-line combustion regeneration conditions: the regeneration temperature is 200-500 ℃, such as 300 ℃; the regeneration pressure is 0.1-1.0 MPa, such as 0.1MPa; the air volume space velocity is 300-2500 h -1 E.g. 500h -1 (ii) a The air regeneration time is 0.5 to 6 hours, such as 3.0 hours; the nitrogen replacement temperature is 10-100 ℃, such as 25 ℃; the space velocity of the nitrogen displacement volume is 100 to 1000 hours -1 E.g. 200h -1 (ii) a The nitrogen replacement time is 0.2 to 3 hours, such as 1.0 hour.
The implementation case is as follows:
example 1
(1) Fresh activated alumina with the diameter of 1-2 mm is placed in a muffle furnace for activation under the condition of heating for 3 hours at 450 ℃. Then taking 52.0g of activated alumina particles, loading the particles into an adsorption column 4, and carrying out Fischer-Tropsch synthesis at 25 ℃ and 0.1MPaOil (carbon number distribution is C6-C18, oxygen-containing compound accounts for about 0.2 wt%) is pumped by a plunger pump, and the mass space velocity is 0.8h -1 The adsorption results are shown in Table 1.
(2) Examples 2 to 5
The method and the amount of activated alumina used in examples 2 to 5 were the same as those used in example 1. Examples 2-5 the experimental adsorption temperature, adsorption pressure, and feed mass space velocity were varied from example 1, and the adsorption results are shown in table 1.
TABLE 1 Experimental conditions and results for examples 1-5
As can be seen from the above table, the alumina has a higher adsorption capacity for the Fischer-Tropsch synthetic oil, and is feasible for removing trace oxygen-containing compounds from the Fischer-Tropsch synthetic oil when being applied to the device provided by the application.
(3) Examples 6 to 8
The adsorption penetration activated alumina under the adsorption condition of the example 1 is regenerated by adopting a steam regeneration method, the examples 6 to 8 adopt different regeneration temperatures, steam mass space velocities and water use amounts, and the regeneration results are shown in a table 2.
TABLE 2 Experimental conditions and results for examples 6 to 8
From the above table, it can be seen that the device provided by the present application is used to implement the steam regeneration method to regenerate the alumina adsorbent, and the regeneration of the alumina adsorbent can be basically and completely realized.
(4) Examples 9 to 11
The adsorption breakthrough activated alumina in example 1 was regenerated by an air on-line combustion regeneration method, examples 9-11 used different regeneration temperatures, air volume space velocities and regeneration times, and the regeneration results are shown in table 3.
TABLE 3 Experimental conditions and results for examples 10 to 12
From the above table, it can be seen that the device provided by the present application is adopted to implement an air on-line combustion regeneration method to regenerate the alumina adsorbent, and the regeneration of the alumina adsorbent can be basically and completely realized.
(5) Comparative examples 1 to 4
Comparative example 1 used a silicon-magnesium type adsorbent (60 to 100 mesh), the adsorbent activation temperature was 350 ℃ and the amount was 37.0g, and the adsorbent activation temperature was 350 ℃, and the other conditions were the same as in example 1. Comparative example 2 used NaY molecular sieve as the adsorbent, and the adsorbent was activated at 550 ℃ in an amount of 44.8g, under the same conditions as in example 1. The adsorbent used in comparative example 3 was a macroporous adsorbent resin D101 (. Phi.0.3 to 1.2 mm) in an amount of 41.5g, and the other conditions were the same as in example 1. The adsorbent used in comparative example 4 was silica gel having a specific surface area of about 400m 2 In a quantity of 57.0 g/g, the other conditions being as in example 1. The adsorption results are shown in Table 4.
Table 4 experimental conditions and results of comparative examples 1 to 4
As can be seen from the above table, the other types of adsorbents have lower adsorption capacities for oxygenates than the activated alumina adsorbent.
To sum up, the embodiment of the utility model provides an among desorption ft synthetic oil oxygenate's device can realize the desorption to micro oxygenate in the ft synthetic oil. The device is simple to operate, low in energy consumption, small in equipment investment and high in practicability, and can remove trace oxygen-containing compounds in Fischer-Tropsch synthetic oil by an adsorption method and basically realize complete removal of the oxygen-containing compounds.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The device for removing the oxygen-containing compounds in the Fischer-Tropsch synthetic oil is characterized by comprising a raw material tank, a metering pump, a fixed bed adsorption column and a product tank;
the head tank with the access connection of metering pump, the import of metering pump with the bottom of fixed bed adsorption column is connected, be provided with active alumina adsorbent in the fixed bed adsorption column, the top of fixed bed adsorption column with the product jar is connected.
2. The apparatus for removing oxygen-containing compounds from Fischer-Tropsch synthesis oil according to claim 1, wherein a back pressure valve is disposed on the connection pipeline between the fixed bed adsorption column and the product tank.
3. The apparatus for removing oxygen-containing compounds from Fischer-Tropsch synthesis oil according to claim 1, further comprising a nitrogen storage tank connected to the top of the fixed bed adsorption column.
4. The device for removing oxygen-containing compounds in Fischer-Tropsch synthesis oil according to claim 1, further comprising an adsorption column heater disposed on the sidewall of the fixed bed adsorption column for heating the fixed bed adsorption column.
5. The device for removing the oxygen-containing compounds in the Fischer-Tropsch synthesis oil according to claim 4, characterized in that the device comprises a water storage tank, the water storage tank is connected with the top of the fixed bed adsorption column, the water storage tank is connected with an inlet of the metering pump, an outlet of the metering pump is connected with the top of the fixed bed adsorption column, and a first heater for heating water into steam is arranged on a pipeline connecting the outlet of the metering pump and the top of the fixed bed adsorption column.
6. The apparatus for removing oxygen-containing compounds in Fischer-Tropsch synthesis oil according to claim 5, wherein the apparatus comprises a recovery water storage tank, and the recovery water storage tank is communicated with the bottom of the fixed bed adsorption column.
7. The apparatus for removing oxygen-containing compounds from Fischer-Tropsch synthesis oil according to claim 5, further comprising an air storage tank, wherein the air storage tank is connected with the top of the fixed bed adsorption column; and a second heater is arranged on a pipeline connecting the air storage tank and the fixed bed adsorption column.
8. The apparatus of claim 7, further comprising a temperature controller, wherein the temperature controller is communicatively connected to the first heater, the adsorption column heater, and the second heater.
9. The apparatus for removing oxygen-containing compounds from Fischer-Tropsch synthesis oil according to any one of claims 1 to 8, wherein the height of the fixed bed adsorption column is 0.5 to 0.7m, the outer diameter of the tube is 15 to 18mm, and the inner diameter of the tube is 10 to 13mm.
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