CN113512440A - Method for producing naphthalene by using coal tar as raw material - Google Patents
Method for producing naphthalene by using coal tar as raw material Download PDFInfo
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- CN113512440A CN113512440A CN202110792279.1A CN202110792279A CN113512440A CN 113512440 A CN113512440 A CN 113512440A CN 202110792279 A CN202110792279 A CN 202110792279A CN 113512440 A CN113512440 A CN 113512440A
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- coal tar
- naphthalene
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C1/00—Working-up tar
- C10C1/04—Working-up tar by distillation
- C10C1/08—Winning of aromatic fractions
- C10C1/12—Winning of aromatic fractions naphthalene fraction heavy fraction
Abstract
The invention relates to the technical field of coal tar, and discloses a method for producing naphthalene by using coal tar as a raw material, which comprises a rapid detection device, wherein the device specifically comprises a mixed heating mechanism, a filtering mechanism and a gas chromatograph, the mixed heating mechanism comprises a U-shaped vertical plate and a water bath heating box, a plurality of heating rods are symmetrically arranged on the side wall of the water bath heating box, the inner wall of the U-shaped vertical plate, which is close to the lower end, is fixedly connected with a transverse plate, the upper end of the transverse plate and the inner wall of the top of the U-shaped vertical plate are rotatably connected with a same rotating screw rod through a bearing, a lifting plate is sleeved on the rod wall thread of the rotating screw rod, and a plurality of pushing rods are symmetrically and fixedly connected with the upper end of the lifting plate. The device and the method for rapidly detecting the naphthalene component content of the coal tar have the advantages that the automation degree of the whole process is high, the coal tar is not required to be manually treated in the earlier stage, the treatment quality and the treatment efficiency are greatly improved, and the use is convenient.
Description
Technical Field
The invention relates to the technical field of coal tar, in particular to a method and a device for producing naphthalene by using coal tar as a raw material.
Background
Black or black brown viscous liquid with pungent odor is generated during coal dry distillation. Referred to as tar for short. Coal tar can be divided into low-temperature coal tar, medium-temperature coal tar and high-temperature coal tar according to the dry distillation temperature, and the coal tar obtained in coke production belongs to the high-temperature coal tar. It is one of coke oven gas purification products condensed and separated in the process of cooling crude gas.
At present, raw material a after dehydration and dephenolization is generally adopted to directly reach naphthalene after being treated through a naphthalene distillation tower to the production of naphthalene process that uses coal tar as raw materials, the design parameter of its naphthalene distillation tower of this kind of mode preparation naphthalene can't accurate control, just also lead to producing the product quality low, if use gas chromatograph to naphthalene component content detection in raw material a, need handle raw material a before the detection, the processing procedure need mix stirring and filter, these are mostly through manual going on, make the processing quality not high and inefficiency, also can cause the phenomenon that the product quality is low.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for producing naphthalene by using coal tar as a raw material, which has the advantages of high automation degree in the whole process, no need of manual operation for processing the raw material a in the early stage, great improvement on the processing quality and the processing efficiency and convenient use, and solves the problems that the naphthalene prepared by the conventional method can not accurately control the design parameters of a naphthalene distillation tower of the naphthalene distillation tower, the quality of the produced product is low, if a gas chromatograph is used for detecting the content of the naphthalene component in the raw material a, the raw material a needs to be processed before detection, the mixing, stirring and filtering are needed in the processing process, most of the steps are manually carried out, the processing quality is low, the efficiency is low, and the product quality is low.
(II) technical scheme
In order to realize the purposes of high automation degree of the whole process, no need of manual operation for processing the coal tar in the earlier stage, great improvement of processing quality and processing efficiency and convenient use, the invention provides the following technical scheme: the method for producing naphthalene by using coal tar as a raw material comprises a rapid detection device, wherein the rapid detection device comprises a mixed heating mechanism, a filtering mechanism and a gas chromatograph, and is characterized in that: the mixing and heating mechanism comprises a U-shaped vertical plate and a water bath heating box, a plurality of heating rods are symmetrically arranged on the side wall of the water bath heating box, the inner wall of the U-shaped vertical plate, which is close to the lower end, is fixedly connected with a horizontal plate, the upper end of the horizontal plate and the inner wall of the top part of the U-shaped vertical plate are rotatably connected with a same rotating screw rod through a bearing, a lifting plate is sleeved on the screw thread of the rod wall of the rotating screw rod, a plurality of ejector rods are symmetrically and fixedly connected with the upper end of the lifting plate, the upper ends of the ejector rods penetrate through the upper end of the U-shaped vertical plate through holes formed in the upper end of the U-shaped vertical plate and are fixedly connected with a same supporting plate, through holes are formed in the surface of one end of the supporting plate, a rotating shaft is sleeved in the through rotation of a ball bearing, an upper cover is fixedly connected with the lower end of the rotating shaft, a mixing tank is fixedly clamped at the lower end of the upper cover, and the mixing tank is arranged in the water bath heating box, the upper end of the rotating shaft is fixedly connected with a driven bevel gear, the upper end of the supporting plate is fixedly provided with a rotating motor, an output shaft of the rotating motor is fixedly connected with a driving bevel gear meshed with the driven bevel gear, and the lower end of the supporting plate is also fixedly connected with the same cooling fan through a plurality of connecting columns;
the filter mechanism comprises a filter box, an extrusion cylinder is fixedly inserted and sleeved at the upper end of the filter box, an extrusion piston is fixedly connected at the lower end of the extrusion cylinder, a filter plate is fixedly connected to the inner wall of the filter box, an organic filter membrane is arranged on the upper side of the filter plate, a feeding pipe is fixedly communicated with the side wall of the upper end of the filter box, and a discharging pipe is fixedly communicated with the lower side of the filter box;
the step of producing naphthalene comprises:
a: carrying out flash evaporation on the coal tar raw material through a tar distillation tower, and then carrying out dehydration and dephenolization treatment to obtain a raw material a;
b: carrying out online detection treatment on the raw material a through a quick detection device:
B1. putting the raw material a and xylene into a mixing tank;
B2. putting a mixing tank into a water bath heating box, heating water in the water bath heating box by a heating rod, rapidly heating materials in the mixing tank, simultaneously starting a rotating motor, driving a driving bevel gear to rotate by the rotating motor, driving a rotating shaft to rotate by the meshing action of the driving bevel gear and a driven bevel gear, further driving the mixing tank to rapidly rotate, rapidly mixing a raw material a and xylene, starting a motor on the lower side of a transverse plate after mixing is completed, driving a rotating screw rod to rotate by the motor, enabling a lifting plate to push up a supporting plate through a plurality of push rods through the threaded sleeve joint action of the rotating screw rod and the lifting plate, further pulling the mixing tank out of the water bath heating box, and rapidly cooling the mixing tank by a cooling fan;
B3. the material in the mixing tank is fed into the filter box through the feeding pipe, the extrusion cylinder is started, the extrusion piston is pushed down by the extrusion cylinder, and then pressure is generated, so that the material quickly passes through the filter plate and the organic filter membrane, filtered filtrate is discharged through the discharging pipe, and quick filtering operation is realized;
B4. sending the obtained filtrate into a gas chromatograph for determination to obtain the peak area of naphthalene, recording the result, and comparing the result with the peak area of standard naphthalene to obtain the content of the naphthalene component in the raw material a;
c: controlling the design parameters of the naphthalene distillation tower according to the content parameter of the naphthalene component in the raw material a measured in the step B4.
Preferably: the upper end fixedly connected with of upper cover is a rotatory section of thick bamboo, the lower extreme fixedly connected with cover of backup pad is the solid fixed cylinder of cover in a rotatory section of thick bamboo, the outer wall of solid fixed cylinder is fixed to be cup jointed spacing ring board, the spacing annular that matches the sliding connection with spacing ring board is seted up to the inner wall of a rotatory section of thick bamboo.
Preferably: the upper end fixedly connected with annular seal piece of blending tank, the annular seal groove of pegging graft is seted up with annular seal piece matching to the lower extreme of upper cover.
Preferably: the outer wall symmetry of upper cover is rotated and is connected with many joint bars, the bayonet socket has been seted up to the lower side pole wall of joint bar, the upper end outer wall symmetry fixedly connected with of blending tank a plurality of fixture blocks with the bayonet socket joint, the lower extreme of joint bar is seted up jack and jack internalization and is inserted and be equipped with the chucking pole, the chucking groove of pegging graft is seted up with the chucking pole correspondence to the lower extreme of fixture block, the lower extreme fixedly connected with chucking arm-tie of chucking pole, the same cover of the upper end of chucking arm-tie and the lower extreme fixedly connected with of chucking pole is established at the chucking spring outside the chucking pole.
Preferably: the feed pipe is provided with a one-way valve.
Preferably: the inner side of the bottom of the filter box is provided with an inclined plane structure.
Preferably: b1 earlier make blending tank and upper cover peg graft relatively through the matching grafting of annular seal piece and annular seal groove before the step, the upset joint pole for the bayonet socket card of joint pole wall is pressed outside the fixture block, realize the firm connection between blending tank and the upper cover, the chucking pole aligns the chucking groove this moment, the chucking spring is drawn upward the chucking arm-tie, the chucking arm-tie can realize the chucking pole and be connected with the firm of fixture block with the chucking pole propulsion chucking inslot, make blending tank and upper cover fast assembly.
(III) advantageous effects
Compared with the prior art, the invention provides a device and a method for rapidly detecting the content of naphthalene components in coal tar, which have the following beneficial effects:
the method for producing naphthalene by using coal tar as a raw material comprises the steps of putting the raw material a and xylene into a mixing tank together, enabling the mixing tank to be oppositely inserted with an upper cover through matching and inserting of an annular sealing block and an annular sealing groove, turning over a clamping rod to enable a bayonet of a clamping rod wall to be clamped outside a clamping block to realize stable connection between the mixing tank and the upper cover, enabling the clamping rod to be aligned with a clamping groove at the moment, pulling a clamping pull plate upwards through a clamping spring, enabling the clamping pull plate to push the clamping rod into the clamping groove to realize stable connection between the clamping rod and the clamping block, enabling the mixing tank to be quickly assembled with the upper cover, putting the mixing tank into a water bath heating box, heating water in the water bath heating box through a heating rod to quickly heat materials in the mixing tank, simultaneously starting a rotating motor which drives a driving bevel gear to rotate, and driving a rotating shaft to rotate through the meshing action of the driving bevel gear and a driven bevel gear, then the mixing tank is driven to rotate rapidly, so that the raw material a and the dimethylbenzene are mixed rapidly, after the mixing is finished, a motor on the lower side of the transverse plate is started, the motor drives the rotating screw to rotate, the lifting plate is pushed up by a plurality of ejector rods through the screw sleeving effect of the rotating screw and the lifting plate, the mixing tank is pulled out of the water bath heating box, the cooling fan is used for rapidly cooling the mixing tank, the material in the mixing tank is sent into a filter box through a feeding pipe, an extrusion cylinder is started, an extrusion piston is pushed down by the extrusion cylinder, so that the material rapidly passes through the filter plate and an organic filter membrane, the filtered filtrate is discharged through a discharging pipe, the rapid filtering operation is realized, the obtained filtrate is sent into a gas chromatograph for measurement, the peak area of naphthalene is obtained, the result is recorded and is compared with the peak area of standard naphthalene, the content of the naphthalene component in the raw material a is obtained, the whole process has high automation degree, does not need manual handling operation on the raw material a in the earlier stage, greatly improves the handling quality and the handling efficiency, and is convenient to use.
Drawings
FIG. 1 is a cross-sectional view of the apparatus for producing naphthalene from coal tar according to the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1 according to the method for producing naphthalene using coal tar as a raw material according to the present invention;
FIG. 3 is an enlarged view of a portion B of FIG. 1 according to the method of the present invention for producing naphthalene using coal tar as a raw material;
FIG. 4 is a side view of the device;
fig. 5 is a view showing the installation position of the gas chromatograph in the present apparatus.
In the figure: 1 gas chromatograph, 2U-shaped vertical plates, 3 water bath heating boxes, 4 heating rods, 5 transverse plates, 6 rotating screws, 7 lifting plates, 8 ejector rods, 9 supporting plates, 10 rotating shafts, 11 upper covers, 12 mixing tanks, 13 driven bevel gears, 14 rotating motors, 15 driving bevel gears, 16 filter boxes, 17 extrusion cylinders, 18 extrusion pistons, 19 filter plates, 20 organic filter membranes, 21 feeding pipes, 22 discharging pipes, 23 rotating cylinders, 24 fixing cylinders, 25 limiting ring plates, 26 limiting ring grooves, 27 annular sealing blocks, 28 annular sealing grooves, 29 clamping rods, 30 bayonets, 31 clamping blocks, 32 clamping rods, 33 clamping grooves, 34 clamping pulling plates, 35 clamping springs, 36 one-way valves, 37 connecting columns and 38 cooling fans.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1 please refer to fig. 1-5, a method for producing naphthalene by using coal tar as a raw material comprises a rapid detection device, the rapid detection device comprises a mixing and heating mechanism, a filtering mechanism and a gas chromatograph 1, the mixing and heating mechanism comprises a U-shaped vertical plate 2 and a water bath heating box 3, a plurality of heating rods 4 are symmetrically arranged on the side wall of the water bath heating box 3, a transverse plate 5 is fixedly connected to the inner wall of the U-shaped vertical plate 2 near the lower end, a same rotating screw 6 is rotatably connected between the upper end of the transverse plate 5 and the inner wall of the top of the U-shaped vertical plate 2 through a bearing, a lifting plate 7 is sleeved on the screw thread of the rod wall of the rotating screw 6, a plurality of pushing rods 8 are symmetrically and fixedly connected to the upper end of the lifting plate 7, a through hole formed on the upper end of the U-shaped vertical plate 2 penetrates through the upper end of the U-shaped vertical plate 2 and is fixedly connected to a same supporting plate 9, a through hole is formed in the surface of one end of the supporting plate 9, a rotating shaft 10 is rotatably sleeved in the through hole through a ball bearing, an upper cover 11 is fixedly connected to the lower end of the rotating shaft 10, a mixing tank 12 is fixedly clamped at the lower end of the upper cover 11, the mixing tank 12 is arranged in the water bath heating box 3, a driven bevel gear 13 is fixedly connected to the upper end of the rotating shaft 10, a rotating motor 14 is fixedly arranged at the upper end of the supporting plate 9, a driving bevel gear 15 meshed with the driven bevel gear 13 is fixedly connected to an output shaft of the rotating motor 14, and the lower end of the supporting plate 9 is also fixedly connected with the same cooling fan 38 through a plurality of connecting columns 37;
put into blending tank 12 with coal tar and xylol together, put into water bath heating cabinet 3 with blending tank 12 in, water in water bath heating cabinet 3 is heated to heating rod 4, carry out rapid heating to the material in blending tank 12, start rotating electrical machines 14 simultaneously, rotating electrical machines 14 drives the rotation of drive bevel gear 15, meshing through drive bevel gear 15 and driven bevel gear 13 drives pivot 10 and rotates, and then drive blending tank 12 and rotate fast, make coal tar and xylol rapid mixing, start the motor of diaphragm 5 downside after the mixture is accomplished, the motor drives and rotates screw rod 6 and rotates, it makes lifter plate 7 push up backup pad 9 through many ejector pins 8 to cup joint the effect through the screw that rotates screw rod 6 and lifter plate 7, and then pull out water bath heating cabinet 3 with blending tank 12 outside, radiator fan 38 carries out rapid cooling to blending tank 12.
The filtering mechanism comprises a filtering box 16, an extrusion cylinder 17 is fixedly inserted and sleeved at the upper end of the filtering box 16, an extrusion piston 18 is fixedly connected at the lower end of the extrusion cylinder 17, a filtering plate 19 is fixedly connected to the inner wall of the filtering box 16, an organic filtering membrane 20 is arranged on the upper side of the filtering plate 19, a feeding pipe 21 is fixedly communicated with the side wall of the upper end of the filtering box 16, and a discharging pipe 22 is fixedly communicated with the lower side of the filtering box 16;
the material in the blending tank 12 is fed into the filter tank 16 through the feeding pipe, the extrusion cylinder 17 is started, the extrusion cylinder 17 pushes down the extrusion piston 18, pressure is generated, the material rapidly passes through the filter plate 19 and the organic filter membrane 20, filtered filtrate is discharged through the discharging pipe 22, and rapid filtering operation is achieved.
The step of producing naphthalene comprises:
a: carrying out flash evaporation on the coal tar raw material through a tar distillation tower, and then carrying out dehydration and dephenolization treatment to obtain a raw material a;
b: carrying out online detection treatment on the raw material a through a quick detection device:
B1. putting the raw material a and the dimethylbenzene into a mixing tank 12;
B2. putting a mixing tank 12 into a water bath heating box 3, heating water in the water bath heating box 3 by a heating rod 4, rapidly heating materials in the mixing tank 12, simultaneously starting a rotating motor 14, wherein the rotating motor 14 drives a driving bevel gear 15 to rotate, driving a rotating shaft 10 to rotate through the meshing action of the driving bevel gear 15 and a driven bevel gear 13, further driving the mixing tank 12 to rapidly rotate, so that a raw material a and dimethylbenzene are rapidly mixed, starting a motor on the lower side of a transverse plate 5 after mixing is completed, driving a rotating screw 6 to rotate by the motor, enabling a lifting plate 7 to push up a support plate 9 through a plurality of push rods 8 through the threaded sleeving action of the rotating screw 6 and the lifting plate 7, further pulling the mixing tank 12 out of the water bath heating box 3, and rapidly cooling the mixing tank 12 by a cooling fan 38;
B3. the material in the mixing tank 12 is fed into a filter tank 16 through a feeding pipe, an extrusion cylinder 17 is started, the extrusion cylinder 17 pushes down an extrusion piston 18, and further pressure is generated, so that the material quickly passes through a filter plate 19 and an organic filter membrane 20, filtered filtrate is discharged through a discharge pipe 22, and quick filtering operation is realized;
B4. sending the obtained filtrate into a gas chromatograph 1 for measurement to obtain the peak area of naphthalene, recording the result, and comparing the result with the peak area of standard naphthalene to obtain the content of the naphthalene component in the raw material a;
c: controlling the design parameters of the naphthalene distillation tower according to the content parameter of the naphthalene component in the raw material a measured in the step B4.
In embodiment 2, referring to fig. 1 on the basis of embodiment 1, the upper end of the upper cover 11 is fixedly connected with a rotating cylinder 23, the lower end of the supporting plate 9 is fixedly connected with a fixed cylinder 24 which is sleeved in the rotating cylinder 23, the outer wall of the fixed cylinder 24 is fixedly sleeved with a limit ring plate 25, and the inner wall of the rotating cylinder 23 is provided with a limit ring groove 26 which is matched with the limit ring plate 25 in sliding connection.
The connection stability of the mixing tank 12 and the support plate 9 is good, and the structural connection strength is greatly improved.
The upper end fixedly connected with annular seal block 27 of blending tank 12, the lower extreme of upper cover 11 is seted up and is matchd the annular seal groove 28 of pegging graft with annular seal block 27.
The mixing tank 12 and the upper cover 11 can be stably assembled in a sealing and plugging way through the matching and plugging of the annular sealing block 27 and the annular sealing groove 28.
The outer wall symmetry of upper cover 11 is rotated and is connected with many joint poles 29, bayonet socket 30 has been seted up to joint pole 29's downside pole wall, the upper end outer wall symmetry fixedly connected with of blending tank 12 is a plurality of fixture blocks 31 with the 30 joint of bayonet socket, the lower extreme of joint pole 29 has been seted up jack and jack internalization and has been inserted and be equipped with chucking pole 32, the chucking groove 33 that corresponds the grafting with chucking pole 32 is seted up to fixture block 31's lower extreme, the lower extreme fixedly connected with chucking arm-tie 34 of chucking pole 32, the same cover of establishing of the upper end of chucking arm-tie 34 and the lower extreme fixedly connected with of joint pole 29 is established at chucking spring 35 outside chucking pole 32.
The clamping rod 29 is turned over, so that the bayonet 30 on the rod wall of the clamping rod 29 is clamped and pressed outside the clamping block 31, stable connection between the mixing tank 12 and the upper cover 11 is achieved, the clamping rod 32 is aligned to the clamping groove 33 at the moment, the clamping spring 35 pulls the clamping pull plate 34 upwards, the clamping pull plate 34 pushes the clamping rod 32 into the clamping groove 33, stable connection between the clamping rod 29 and the clamping block 31 can be achieved, and the mixing tank 12 and the upper cover 11 are rapidly assembled.
Be provided with check valve 36 on the inlet pipe 21, material pours out influence operation when avoiding filtering the extrusion.
The inner side of the bottom of the filter box 16 is provided with an inclined surface structure, so that the blanking is smoother.
Before the step B1, the mixing tank 12 and the upper cover 11 are relatively inserted by matching and inserting the annular sealing block 27 and the annular sealing groove 28, the clamping rod 29 is turned over, the bayonet 30 on the rod wall of the clamping rod 29 is clamped and pressed outside the clamping block 31, the stable connection between the mixing tank 12 and the upper cover 11 is realized, at the moment, the clamping rod 32 is aligned with the clamping groove 33, the clamping spring 35 pulls the clamping pull plate 34 upwards, the clamping pull plate 34 pushes the clamping rod 32 into the clamping groove 33, the stable connection between the clamping rod 29 and the clamping block 31 can be realized, and the mixing tank 12 and the upper cover 11 are quickly assembled.
In conclusion, according to the device and the method for rapidly detecting the content of naphthalene components in coal tar, coal tar and xylene are placed into the mixing tank 12 together, the mixing tank 12 and the upper cover 11 are relatively inserted through matched insertion of the annular sealing block 27 and the annular sealing groove 28, the clamping rod 29 is turned over, the bayonet 30 on the rod wall of the clamping rod 29 is clamped and pressed outside the clamping block 31, so that stable connection between the mixing tank 12 and the upper cover 11 is realized, the clamping rod 32 is aligned to the clamping groove 33 at the moment, the clamping spring 35 pulls the clamping pull plate 34 upwards, the clamping pull plate 34 pushes the clamping rod 32 into the clamping groove 33, so that stable connection between the clamping rod 29 and the clamping block 31 can be realized, and the mixing tank 12 and the upper cover 11 are rapidly assembled; putting a mixing tank 12 into a water bath heating box 3, heating water in the water bath heating box 3 by a heating rod 4, rapidly heating materials in the mixing tank 12, simultaneously starting a rotating motor 14, wherein the rotating motor 14 drives a driving bevel gear 15 to rotate, driving a rotating shaft 10 to rotate through the meshing action of the driving bevel gear 15 and a driven bevel gear 13, further driving the mixing tank 12 to rapidly rotate, so that coal tar and dimethylbenzene are rapidly mixed, starting a motor on the lower side of a transverse plate 5 after mixing is completed, driving a rotating screw 6 to rotate by the motor, enabling a lifting plate 7 to push up a support plate 9 through a plurality of push rods 8 through the threaded sleeving action of the rotating screw 6 and the lifting plate 7, further pulling the mixing tank 12 out of the water bath heating box 3, and rapidly cooling the mixing tank 12 by a cooling fan 38; the material in the mixing tank 12 is fed into a filter tank 16 through a feeding pipe, an extrusion cylinder 17 is started, the extrusion cylinder 17 pushes down an extrusion piston 18, and further pressure is generated, so that the material quickly passes through a filter plate 19 and an organic filter membrane 20, filtered filtrate is discharged through a discharge pipe 22, and quick filtering operation is realized; and (3) sending the obtained filtrate into a gas chromatograph 1 for determination to obtain the naphthalene peak area, recording the result, and comparing the result with the standard naphthalene peak area to obtain the content of the naphthalene component in the coal tar.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The method for producing naphthalene by using coal tar as a raw material is characterized by comprising the following steps of:
a: carrying out flash evaporation on the coal tar raw material through a tar distillation tower, and then carrying out dehydration and dephenolization treatment to obtain a raw material a;
b: carrying out online detection treatment on the raw material a through a quick detection device:
B1. putting the raw material a and xylene into a mixing tank (12);
B2. putting a mixing tank (12) into a water bath heating box (3), heating water in the water bath heating box (3) by a heating rod (4), rapidly heating materials in the mixing tank (12), simultaneously starting a rotating motor (14), driving a driving bevel gear (15) to rotate by the rotating motor (14), driving a rotating shaft (10) to rotate by the meshing action of the driving bevel gear (15) and a driven bevel gear (13), further driving the mixing tank (12) to rapidly rotate, so that raw materials a and dimethylbenzene are rapidly mixed, starting a motor on the lower side of a transverse plate (5) after the mixing is finished, driving a rotating screw rod (6) to rotate by the motor, enabling a lifting plate (7) to push up a support plate (9) through a plurality of push rods (8) through the threaded sleeve joint action of the rotating screw rod (6) and the lifting plate (7), and further pulling the mixing tank (12) out of the water bath heating box (3), the cooling fan (38) is used for rapidly cooling the mixing tank (12);
B3. the method comprises the following steps of (1) feeding materials in a mixing tank (12) into a filter box (16) through a feeding pipe, starting an extrusion cylinder (17), pushing down an extrusion piston (18) by the extrusion cylinder (17), further generating pressure to enable the materials to rapidly pass through a filter plate (19) and an organic filter membrane (20), discharging filtered filtrate through a discharge pipe (22), and realizing rapid filtering operation;
B4. sending the obtained filtrate into a gas chromatograph (1) for determination to obtain the peak area of naphthalene, recording the result, and comparing the result with the peak area of standard naphthalene to obtain the content of the naphthalene component in the raw material a;
c: controlling the design parameters of the naphthalene distillation tower according to the content parameter of the naphthalene component in the raw material a measured in the step B4.
2. The method for producing naphthalene by using coal tar as a raw material according to claim 1, which comprises a rapid detection device, wherein the rapid detection device comprises a mixing and heating mechanism, a filtering mechanism and a gas chromatograph (1), and is characterized in that: the mixed heating mechanism comprises a U-shaped vertical plate (2) and a water bath heating box (3), a plurality of heating rods (4) are symmetrically arranged on the side wall of the water bath heating box (3), a transverse plate (5) is fixedly connected to the inner wall, close to the lower end, of the U-shaped vertical plate (2), the upper end of the transverse plate (5) and the inner wall of the top of the U-shaped vertical plate (2) are rotatably connected with a same rotating screw (6) through bearings, a lifting plate (7) is sleeved on the rod wall of the rotating screw (6) in a threaded manner, a plurality of ejector rods (8) are symmetrically and fixedly connected to the upper end of the lifting plate (7), the upper ends of the ejector rods (8) penetrate through the upper end of the U-shaped vertical plate (2) through holes formed in the upper end of the U-shaped vertical plate (2) and are fixedly connected with a same supporting plate (9), a through hole is formed in the surface of one end of the supporting plate (9), and a rotating shaft (10) is rotatably sleeved in the through ball bearing, the lower end of the rotating shaft (10) is fixedly connected with an upper cover (11), the lower end of the upper cover (11) is fixedly clamped with a mixing tank (12), the mixing tank (12) is arranged in the water bath heating box (3), the upper end of the rotating shaft (10) is fixedly connected with a driven bevel gear (13), the upper end of the supporting plate (9) is fixedly provided with a rotating motor (14), an output shaft of the rotating motor (14) is fixedly connected with a driving bevel gear (15) meshed with the driven bevel gear (13), and the lower end of the supporting plate (9) is also fixedly connected with the same cooling fan (38) through a plurality of connecting columns (37);
the filter mechanism comprises a filter box (16), an extrusion cylinder (17) is fixedly sleeved on the upper end of the filter box (16), an extrusion piston (18) is fixedly connected to the lower end of the extrusion cylinder (17), a filter plate (19) is fixedly connected to the inner wall of the filter box (16), an organic filter membrane (20) is arranged on the upper side of the filter plate (19), a feeding pipe (21) is fixedly communicated with the side wall of the upper end of the filter box (16), and a discharging pipe (22) is fixedly communicated with the lower side of the filter box (16).
3. The method for producing naphthalene by using coal tar as a raw material according to claim 2, characterized by comprising the following steps: the upper end fixedly connected with of upper cover (11) is a rotatory section of thick bamboo (23), the lower extreme fixedly connected with cover of backup pad (9) is fixed a section of thick bamboo (24) in a rotatory section of thick bamboo (23), the outer wall of a fixed section of thick bamboo (24) is fixed to be cup jointed spacing ring board (25), spacing ring groove (26) that match the sliding connection with spacing ring board (25) are seted up to the inner wall of a rotatory section of thick bamboo (23).
4. The method for producing naphthalene by using coal tar as a raw material according to claim 3, characterized by comprising the following steps: the upper end fixedly connected with annular seal piece (27) of blending tank (12), annular seal groove (28) of pegging graft are seted up with annular seal piece (27) matching to the lower extreme of upper cover (11).
5. The method for producing naphthalene by using coal tar as a raw material according to claim 4, wherein: the outer wall symmetry of upper cover (11) is rotated and is connected with many joint poles (29), bayonet socket (30) have been seted up to the downside pole wall of joint pole (29), the upper end outer wall symmetry fixedly connected with of blending tank (12) is a plurality of fixture block (31) with bayonet socket (30) joint, the lower extreme of joint pole (29) has been seted up jack and jack internalization and has been inserted and be equipped with chucking pole (32), chucking groove (33) of pegging graft are seted up with chucking pole (32) correspondence to the lower extreme of fixture block (31), the lower extreme fixedly connected with chucking arm-tie (34) of chucking pole (32), the same cover of establishing at chucking pole (32) outer chucking spring (35) of upper end of chucking arm-tie (34) and the lower extreme fixedly connected with of joint pole (29).
6. The method for producing naphthalene by using coal tar as a raw material according to claim 5, characterized by comprising the following steps: the feeding pipe (21) is provided with a one-way valve (36).
7. The method for producing naphthalene by using coal tar as a raw material according to claim 6, wherein: the inner side of the bottom of the filter box (16) is provided with an inclined plane structure.
8. The method for producing naphthalene by using coal tar as a raw material according to claim 1, characterized by comprising the following steps: before the step B1, the mixing tank (12) and the upper cover (11) are relatively inserted through matching and inserting of the annular sealing block (27) and the annular sealing groove (28), the clamping rod (29) is turned over, the bayonet (30) of the rod wall of the clamping rod (29) is clamped and pressed outside the clamping block (31), stable connection between the mixing tank (12) and the upper cover (11) is achieved, the clamping rod (32) is aligned to the clamping groove (33), the clamping pull plate (34) is pulled upwards by the clamping spring (35), the clamping pull plate (34) pushes the clamping rod (32) into the clamping groove (33), stable connection between the clamping rod (29) and the clamping block (31) can be achieved, and the mixing tank (12) and the upper cover (11) are rapidly assembled.
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