CN109731561B - Feeding device of deoiling and desorbing tower after silica gel adsorption and process method thereof - Google Patents
Feeding device of deoiling and desorbing tower after silica gel adsorption and process method thereof Download PDFInfo
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Abstract
The application relates to a feeding device of a deoiling and desorbing tower after silica gel adsorption and a process method thereof. According to the application, the feeding device and the material circulating device are arranged, so that the old water is pumped into the desorption tower by the slurry pump, the silica gel feeding operation is simplified, a large amount of silica gel is convenient to feed, the working efficiency of the device is improved, the recycling of raw materials can be realized, the environmental pollution is reduced, and the cost is reduced; in addition, through setting up multilayer circulation scraper blade and fixed plate in the desorption tower, make silica gel in the desorption tower with "S" shape route motion, extension silica gel dwell time in the desorption tower improves silica gel deoiling efficiency.
Description
Technical Field
The application belongs to the technical field of silica gel regeneration, and particularly relates to a feeding device of a deoiling and desorbing tower after silica gel adsorption and a process method thereof.
Background
At present, the conventional technology is used for regenerating the II-type base oil by a hydrogenation process, and the method has the defects of poor safety and stability, high cost, large equipment investment and the like. Recent researches show that regenerated II base oil can be obtained by adsorption extraction of adsorbents such as silica gel, and because the polarity of the silica gel is strong, non-ideal components in waste lubricating oil can be adsorbed, part of lubricating oil can be adhered to the surface of the silica gel after the silica gel is adsorbed, part of lubricating oil can be mixed in gaps between the silica gel, and if the silica gel adsorbing lubricating oil is directly treated as garbage, certain pollution is caused to the environment, and resources are wasted. In this method, the adsorbent is saturated after a period of use, and adsorption cannot be continued. At present, the traditional silica gel regeneration method is generally realized by calcination, but the method is simple, the scientific and green method is not utilized for regenerating the silica gel, the recycling of resources is not realized, the equipment energy consumption is high, the feeding difficulty is high, the large-scale deoiling operation of the silica gel cannot be realized, and the method is not an optimal adsorbent regeneration device and method. Therefore, the device for deoiling regeneration after adsorption of the adsorbent, which is scientific and reasonable, green and environment-friendly, solves the problem of mass feeding of silica gel, can improve the regeneration efficiency of the adsorbent and can achieve the recycling function of integral resources, has important economic, social, environment-friendly value and practical significance.
Disclosure of Invention
The application aims to solve the problems and provide the feeding device of the deoiling and desorbing tower after silica gel adsorption and the process method thereof, which have simple structure and reasonable design.
The application realizes the above purpose through the following technical scheme:
the feeding device of the deoiling and desorbing tower after silica gel adsorption comprises a desorbing tower, a feeding device and a material circulating device, wherein a plurality of material inlets and outlets are formed in the surface of the desorbing tower, and the feeding device comprises a solvent outlet and a silica gel outlet which are formed in the top end of the adsorbing tower, and a silica gel inlet and a solvent inlet which are respectively formed in the upper end and the lower end of the side surface of the adsorbing tower; a blocking net is arranged at the top end of the inner cavity of the adsorption tower; the device comprises an adsorption tower, a motor a, a plurality of scrapers, a fixed plate, a through hole, a desorption tower, a separation net, a motor a, a plurality of scrapers, a plurality of upper scrapers, a lower scraper, a fixed plate, a desorption tower upper scraper and a desorption tower lower scraper, wherein the central position inside the adsorption tower is vertically provided with the rotation shaft penetrating through the separation net, the rotation shaft is driven by the motor a arranged at the top end of the adsorption tower, the rotation shaft is sequentially provided with the plurality of scrapers from top to bottom, the scrapers comprise the upper scraper and the lower scraper, the fixed plate is arranged below the scrapers, the through hole is arranged at the central position of the fixed plate, and the desorption tower is circularly provided with the upper scraper and the lower scraper as a group of components inside the desorption tower;
the feeding device comprises a stirring and mixing kettle arranged at the side edge of the desorption tower, a plurality of feeding and discharging ports are arranged on the stirring and mixing kettle, an outlet below the stirring and mixing kettle is connected with a slurry pump through a conduit, and the slurry pump is communicated with a silica gel inlet on the desorption tower through the conduit;
the material circulating device comprises a separating device communicated with a silica gel outlet at the lower end of the desorption tower, the outlet end of the separating device is connected with a first air pump through a conduit, and the first air pump is communicated with a solvent inlet on the desorption tower; the material circulating device is characterized by further comprising a temporary storage tank arranged on the side edge of the desorption tower, wherein the inlet end of the temporary storage tank is communicated with the solvent outlet at the upper end of the desorption tower through a conduit, the outlet end of the temporary storage tank is connected with a second air pump through a conduit, and the second air pump is communicated with the inlet end of the stirring and mixing kettle.
Through adopting above-mentioned technical scheme, carry silica gel to the desorption tower in through the sediment stuff pump, the material loading operation of silica gel of being convenient for, and can realize the a large amount of material loading of silica gel, and the device has realized the separation recycle of solvent and desorption oil through material circulating device, has realized the regeneration of silica gel, has improved the utilization efficiency of raw materials, reduces environmental pollution, has also improved silica gel regeneration quality.
As a further optimization scheme of the application, the scraper comprises a plurality of arc-shaped blades, the bending direction of the arc-shaped blades of the upper scraper is consistent with the rotation direction of the rotation shaft, and the bending direction of the arc-shaped blades of the lower scraper is opposite to the rotation direction of the rotation shaft.
By adopting the technical scheme, the silica gel moves centripetally or centrifugally and downwards under the action of the upper layer scraper and the lower layer scraper.
As a further optimization scheme of the application, a fixed plate below the upper scraper is fixedly connected with the inner wall of the desorption tower and is in close contact with the inner wall of the desorption tower, a circular discharging opening is horizontally and outwards cut through holes in the center of the fixed plate below the upper scraper, and the diameter of the discharging opening is larger than that of the rotating shaft; the fixed plate below the lower scraper is fixedly connected with the inner wall of the desorption tower through a plurality of fixed rods, and a gap is formed between the fixed plate and the inner wall of the desorption tower at a position close to the fixed plate.
Through adopting above-mentioned technical scheme, make silica gel carry out "S" shape orbit motion in the desorption tower, extension silica gel dwell time in the desorption tower improves silica gel deoiling efficiency.
As a further optimization scheme of the application, the height-to-diameter ratio of the desorption tower is 5-8:1, and the lowest scraper of the desorption tower is of an upper scraper structure.
By adopting the technical scheme, the adsorption tower is high enough, so that the silica gel deoiling is more thorough.
As a further optimization scheme of the application, the silica gel inlet direction of the silica gel inlet is tangential to the rotation direction of the scraper in the desorption tower.
By adopting the technical scheme, the resistance of the silica gel entering the desorption tower is reduced, and the discharging is convenient.
The process method of the silica gel adsorption and deoiling desorption tower feeding device comprises the following steps:
s1: silica gel material after adsorption
Conveying the adsorbed silica gel into a stirring and mixing kettle, and conveying the adsorbed silica gel into a desorption tower through a slurry pump while stirring;
s2: silica gel desorption after adsorption
NMP solvent is input into the desorption tower in proportion, silica gel moves downwards from the central discharge hole of the fixed plate under the action of the upper scraper, flows to the lower end of the desorption tower from the peripheral discharge hole of the fixed plate under the action of the lower scraper, and circulates in sequence, so that the movement track of the silica gel is S-shaped;
s3: material recycling
The desorbed silica gel enters a separation device, the separated solvent is pumped into a desorption tower again for recycling, and the desorbed silica gel is dried and regenerated; and the solvent and base oil mixed solution output by the solvent outlet is partially pumped into the stirring and mixing kettle under the action of the temporary storage tank and the second air pump for recycling.
As a further optimization scheme of the application, the solvent in the step S2 is NMP, the dehumidification temperature of the NMP entering the desorption tower is kept at 160-180 ℃, and the ratio of the silica gel to the solvent is 1:1-2.
As a further optimization scheme of the application, the temperature of the mixed solution of the solvent and the base oil at the solvent outlet in the step S3 is kept at 80-100 ℃.
The application has the beneficial effects that:
according to the application, the feeding device and the material circulating device are arranged, so that the silica gel is pumped into the desorption tower by the slurry pump, the silica gel feeding operation is simplified, a large amount of silica gel is convenient to feed, the working efficiency of the device is improved, the recycling of raw materials can be realized, the environmental pollution is reduced, and the cost is reduced;
according to the application, the multi-layer circulating scraping plates and the fixing plates are arranged in the desorption tower, so that the silica gel moves in the desorption tower in an S-shaped route, the residence time of the silica gel in the desorption tower is prolonged, and the deoiling efficiency of the silica gel is improved;
the application has simple structure, high stability, reasonable design and convenient realization.
Drawings
FIG. 1 is a process flow diagram of the present application;
FIG. 2 is a schematic diagram of the structure of a desorption column of the present application;
FIG. 3 is a schematic view of the upper doctor blade portion of FIG. 1;
fig. 4 is a schematic view of the lower blade portion of fig. 1.
In the figure: 1. a desorption tower; 2. a separation device; 3. stirring and mixing the mixture in a kettle; 4. a temporary storage tank; 11. a motor a; 12. a silica gel inlet; 13. a solvent outlet; 14. a barrier web; 15. a rotating shaft; 16. a scraper; 17. a fixing plate; 18. a solvent inlet; 19. a silica gel outlet; 21. a first air pump; 31. a slurry pump; 41. a second air pump; 171. a feed opening; 172. and a fixing rod.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings, wherein it is to be understood that the following detailed description is for the purpose of further illustrating the application only and is not to be construed as limiting the scope of the application, as various insubstantial modifications and adaptations of the application to those skilled in the art can be made in light of the foregoing disclosure.
Example 1
As shown in fig. 1-4, the feeding device of the deoiling and desorbing tower after silica gel adsorption comprises a desorbing tower 1, a feeding device and a material circulating device, wherein the desorbing tower 1 is columnar, a plurality of material inlets and outlets are arranged on the surface of the desorbing tower 1, the desorbing tower comprises a solvent outlet 13 arranged at the top end of the adsorbing tower, a silica gel inlet 12 and a solvent inlet 18 respectively arranged at the upper end and the lower end of the side surface of the adsorbing tower, and a silica gel outlet 19 is further arranged at the bottom end of the adsorbing tower so as to realize the feeding and discharging operation of materials; the top end of the inner cavity of the adsorption tower is provided with a blocking net 14 for blocking silica gel particles and preventing the silica gel from escaping from the solvent outlet 13; the inside central point of adsorption tower is put vertically and is provided with the axis of rotation 15 that runs through separation net 14, axis of rotation 15 is by setting up motor a11 on adsorption tower top, axis of rotation 15 has set gradually a plurality of scrapers 16 from top to bottom, scraper 16 includes upper strata scraper and lower floor's scraper, scraper 16 includes a plurality of arc blades, the arc blade bending direction of upper strata scraper 16 is unanimous with the direction of rotation of axis of rotation 15, the bending direction of lower floor's scraper arc blade is opposite with the direction of rotation of axis of rotation 15, the below of scraper 16 all is provided with fixed plate 17, fixed plate 17 central point puts and is provided with the through-hole so that axis of rotation 15 passes each fixed plate 17, fixed plate 17 and the desorption tower 1 inner wall fixed connection and the in close contact of upper strata scraper below fixed plate 17 central point put the through-hole horizontal outside cut of upper strata scraper has circular feed opening 171, feed opening 171 diameter is greater than axis of rotation 15 diameter, be convenient for the silica gel in desorption tower 1 circulate; the fixed plate 17 of lower floor's scraper below with desorption tower 1 inner wall passes through a plurality of dead levers 172 fixed connection, the fixed plate 17 is provided with the clearance with desorption tower 1 inner wall near the position to silica gel flows down by the clearance position, desorption tower 1 is with upper scraper and lower floor's scraper for a set of part at its inside circulation setting, desorption tower 1's altitude ratio is 5-8:1, the lowest scraper of the desorption tower 1 is arranged to be an upper scraper structure.
The feeding device comprises a stirring mixing kettle 3 arranged on the side edge of the desorption tower 1, a plurality of feeding and discharging ports are arranged on the stirring mixing kettle 3, an outlet below the stirring mixing kettle 3 is connected with a slurry pump 31 through a conduit, the slurry pump 31 is communicated with a silica gel inlet 12 on the desorption tower 1 through the conduit, and silica gel after adsorption in the stirring mixing kettle 3 is conveyed into the desorption tower 1 through the slurry pump 31, so that feeding is completed.
The material circulation device comprises a separation device 2 communicated with a silica gel outlet 19 at the lower end of the desorption tower 1, the outlet end of the separation device 2 is connected with a first air pump 21 through a conduit, the first air pump 21 is communicated with another solvent inlet 18 on the desorption tower 1, and the solvent separated by the separation device 2 is conveyed into the desorption tower 1 again through the first air pump 21 for recycling; the material circulating device further comprises a temporary storage tank 4 arranged on the side edge of the desorption tower 1, the inlet end of the temporary storage tank 4 is communicated with a solvent outlet 13 at the upper end of the desorption tower 1 through a conduit, the outlet end of the temporary storage tank 4 is connected with a second air pump 41 through a conduit, the second air pump 41 is communicated with the inlet end of the stirring and mixing kettle 3, and the mixed liquid of the solvent and the base oil output by the desorption tower 1 is partially conveyed into the stirring and mixing kettle 3, so that silica gel is in a mobile phase under the action of the solvent and the oil, and a slurry pump 31 is convenient to pump the silica gel into the desorption tower 1, so that the cyclic utilization of the solvent is realized.
The silica gel inlet 12 is tangential to the rotation direction of the scraper 16 in the desorption tower 1, so as to reduce the resistance of the silica gel feeding.
The process method of the feeding device of the deoiling and desorbing tower after silica gel adsorption comprises the following steps:
s1: silica gel material after adsorption
Conveying the adsorbed silica gel into a stirring and mixing kettle 3, and conveying the adsorbed silica gel into a desorption tower 1 through a slurry pump 31 while stirring;
s2: silica gel desorption after adsorption
NMP solvent enters the desorption tower 1 from the solvent inlet 18 according to a proportion, silica gel flows from top to bottom in the desorption tower 1, the central discharge port of the fixed plate 17 moves downwards under the rotation action of the upper scraper, the discharge port 171 at the periphery of the fixed plate 17 flows to the lower end of the desorption tower 1 under the rotation action of the lower scraper and circulates in sequence, so that the motion track of the silica gel is S-shaped, the residence time of the silica gel in the desorption tower 1 is prolonged, the action between the silica gel and the desorption solvent NMP is promoted, and the silica gel is deoiled;
s3: material recycling
The desorbed silica gel enters a separating device 2 at the lower end of the silica gel, the separated solvent is pumped into a desorption tower 1 again for recycling, and the desorbed silica gel is dried and regenerated; the mixed solution of the solvent and the base oil output by the solvent outlet 13 is partially pumped into the stirring and mixing kettle 3 under the action of the temporary storage tank 4 and the second air pump 41, so that the recycling of materials is realized.
The solvent in the step S2 is NMP (methyl pyrrolidone), and the ratio of the silica gel to the solvent is 1:1-2, wherein the dehumidification temperature of NMP entering the desorption tower 1 is kept at 160-180 ℃; the temperature of the solvent and base oil mixture at the solvent outlet 13 in the step S3 is maintained at 80-100 ℃.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.
Claims (6)
1. The utility model provides a deoiling desorption tower loading attachment after silica gel adsorbs which characterized in that: the device comprises a desorption tower (1), a feeding device and a material circulating device, wherein a plurality of material inlets and outlets are arranged on the surface of the desorption tower (1), and the device comprises a solvent outlet (13) and a silica gel outlet (19) which are arranged at the top end of an adsorption tower, and a silica gel inlet (12) and a solvent inlet (18) which are respectively arranged at the upper end and the lower end of the side surface of the adsorption tower; a blocking net (14) is arranged at the top end of the inner cavity of the adsorption tower; the adsorption tower is characterized in that a rotating shaft (15) penetrating through the blocking net (14) is vertically arranged at the central position inside the adsorption tower, the rotating shaft (15) is driven by a motor a (11) arranged at the top end of the adsorption tower, a plurality of scrapers (16) are sequentially arranged on the rotating shaft (15) from top to bottom, each scraper (16) comprises an upper scraper and a lower scraper, a fixing plate (17) is arranged below each scraper (16), a through hole is formed in the central position of each fixing plate (17), and the upper scrapers and the lower scrapers of the desorption tower (1) are circularly arranged in the inside of the desorption tower;
the feeding device comprises a stirring mixing kettle (3) arranged on the side edge of the desorption tower (1), a plurality of feeding and discharging ports are arranged on the stirring mixing kettle (3), an outlet below the stirring mixing kettle (3) is connected with a slurry pump (31) through a conduit, and the slurry pump (31) is communicated with a silica gel inlet (12) on the desorption tower (1) through the conduit;
the material circulation device comprises a separation device (2) communicated with a silica gel outlet (19) at the lower end of the desorption tower (1), the outlet end of the separation device (2) is connected with a first air pump (21) through a conduit, and the first air pump (21) is communicated with a solvent inlet (18) on the desorption tower (1); the material circulating device further comprises a temporary storage tank (4) arranged on the side edge of the desorption tower (1), the inlet end of the temporary storage tank (4) is communicated with a solvent outlet (13) at the upper end of the desorption tower (1) through a conduit, the outlet end of the temporary storage tank (4) is connected with a second air pump (41) through a conduit, and the second air pump (41) is communicated with the inlet end of the stirring and mixing kettle (3);
the scraper (16) comprises a plurality of arc-shaped blades, the bending direction of the arc-shaped blade of the upper scraper is consistent with the rotation direction of the rotation shaft (15), and the bending direction of the arc-shaped blade of the lower scraper is opposite to the rotation direction of the rotation shaft (15);
the fixed plate (17) below the upper scraper is fixedly connected with the inner wall of the desorption tower (1) and is in tight contact with the inner wall of the desorption tower, a circular blanking opening (171) is horizontally and outwards cut through holes in the center of the fixed plate (17) below the upper scraper, and the diameter of the blanking opening (171) is larger than that of the rotating shaft (15); the fixed plate (17) below the lower scraper is fixedly connected with the inner wall of the desorption tower (1) through a plurality of fixed rods (172), and a gap is formed between the fixed plate (17) and the inner wall of the desorption tower (1) at a position close to the position;
the silica gel moves in the S-shaped track in the desorption tower (1), so that the residence time of the silica gel in the desorption tower (1) is prolonged, and the deoiling efficiency of the silica gel is improved.
2. The silica gel post-adsorption deoiling desorption tower feeding device according to claim 1, wherein: the height-diameter ratio of the desorption tower (1) is 5-8:1, the lowest scraper of the desorption tower (1) is of an upper scraper structure.
3. The silica gel post-adsorption deoiling desorption tower feeding device according to claim 1, wherein: the silica gel entering direction of the silica gel inlet (12) is tangential to the rotating direction of the scraper (16) in the desorption tower (1).
4. A process for feeding a device for a deoiling and desorbing column after adsorption on silica gel according to any one of claims 1-3, comprising the steps of:
s1: silica gel material after adsorption
Conveying the adsorbed silica gel into a stirring mixing kettle (3), and conveying the adsorbed silica gel into a desorption tower (1) through a slurry pump (31) while stirring;
s2: silica gel desorption after adsorption
NMP solvent is proportionally input into the desorption tower (1), silica gel moves downwards from a central discharge hole of the fixed plate (17) under the action of the upper scraper, flows to the lower end of the desorption tower (1) from a discharge hole (171) at the periphery of the fixed plate (17) under the action of the lower scraper, and circulates in sequence, so that the movement track of the silica gel is S-shaped;
s3: material recycling
The desorbed silica gel enters a separation device (2), the separated solvent is pumped into a desorption tower (1) again for recycling, and the desorbed silica gel is dried and regenerated; the solvent and base oil mixed solution output by the solvent outlet (13) is partially pumped into the stirring and mixing kettle (3) under the action of the temporary storage tank (4) and the second air pump (41) for recycling.
5. The process of the feeding device of the deoiling and desorbing tower after silica gel adsorption according to claim 4, wherein the process comprises the following steps: in the step S2, the solvent is NMP, the dehumidification temperature of NMP entering the desorption tower (1) is kept at 160-180 ℃, and the ratio of silica gel to solvent is 1:1-2.
6. The process of the feeding device of the deoiling and desorbing tower after silica gel adsorption according to claim 4, wherein the process comprises the following steps: the temperature of the mixed solution of the solvent and the base oil at the solvent outlet (13) in the step S3 is kept at 80-100 ℃.
Priority Applications (1)
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| CN201910124280.XA CN109731561B (en) | 2019-02-19 | 2019-02-19 | Feeding device of deoiling and desorbing tower after silica gel adsorption and process method thereof |
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| CN201910124280.XA CN109731561B (en) | 2019-02-19 | 2019-02-19 | Feeding device of deoiling and desorbing tower after silica gel adsorption and process method thereof |
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