CN115531925A - Pure benzene tower dehydration device and dehydration process - Google Patents
Pure benzene tower dehydration device and dehydration process Download PDFInfo
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- CN115531925A CN115531925A CN202211503526.2A CN202211503526A CN115531925A CN 115531925 A CN115531925 A CN 115531925A CN 202211503526 A CN202211503526 A CN 202211503526A CN 115531925 A CN115531925 A CN 115531925A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/12—Auxiliary equipment particularly adapted for use with liquid-separating apparatus, e.g. control circuits
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Abstract
The invention relates to the technical field of chemical industry, in particular to a pure benzene tower dehydration device and a dehydration process, which comprise a cylinder body, wherein an inner cylinder is arranged in the cylinder body, the inner cylinder divides the cylinder body into a middle cavity and an annular cavity, two partition plates are arranged between the cylinder body and the inner cylinder, the annular cavity is divided into a first annular cavity and a second annular cavity by the two partition plates, partition components are respectively arranged between the middle cavity and the first annular cavity as well as between the middle cavity and the second annular cavity, two groups of feeding pipelines are arranged on two sides of the upper part of the cylinder body, a discharge pipeline is arranged in the middle of the upper part of the cylinder body, a detection component is arranged at the upper end of the discharge pipeline, a pressure control component is also arranged on the upper part of the cylinder body, and a balance component is also arranged in the cylinder body.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a pure benzene tower dehydration device and a dehydration process.
Background
Benzene is a highly flammable, odorous, colorless liquid at ambient temperature, is poorly soluble in water, has a density less than that of water, is readily soluble in organic solvents, and can itself serve as an organic solvent. When pouring into crude benzene into the pure benzene tower, need dewater crude benzene, chinese patent that application number is "CN201922389308.0" provides a pure benzene tower dewatering device, the dipping barrel comprises a barrel body, staving top fixed mounting has the bung, the fixed input tube that is equipped with in staving upper portion of bung below, the outside end of input tube is through first valve fixedly connected with connecting bend, bung top fixed surface is equipped with gas injection pipe and relief valve, gas injection pipe top fixedly connected with loading system, the fixed output tube that is equipped with in staving bottom, install the tee bend on the end of output tube, all install a first connecting pipe on two other exports of tee bend, every the outside end of first connecting pipe all accomplishes the dehydration through second valve fixedly connected with second connecting pipe, and it is located the water of lower floor after stewing through discharging, because benzene and water all are colorless transparent liquid, the layering boundary line of the two is not convenient for observation, hardly judges whether the water is clean, and then influences the effect of dehydration.
Disclosure of Invention
In view of the above, the present invention is directed to a pure benzene tower dehydration device and a dehydration process, so as to solve the problem that the layered boundary between benzene and water is not easy to observe.
Based on the purpose, the invention provides a pure benzene tower dehydration device which comprises a barrel body, wherein an inner barrel is arranged in the barrel body, the inner barrel divides the barrel body into a middle cavity and an annular cavity, two partition plates are arranged between the barrel body and the inner barrel, the annular cavity is divided into a first annular cavity and a second annular cavity by the two partition plates, partition components are respectively arranged between the middle cavity and the first annular cavity and between the middle cavity and the second annular cavity, the two partition components respectively control the connection and disconnection of the first annular cavity and the middle cavity and between the second annular cavity and the middle cavity, two groups of feeding pipelines are arranged on two sides of the upper part of the barrel body, the two groups of feeding pipelines are respectively communicated with the first annular cavity and the second annular cavity, a discharging pipeline is arranged in the middle part of the upper part of the barrel body along the vertical direction, the lower end of the discharging pipeline extends into the middle cavity and is contacted with liquid in the middle cavity, a detection component is arranged at the upper end of the discharging pipeline, the detection component detects the layering of the benzene and the water, a pressure control component for controlling the pressurization in the middle cavity is further arranged in the upper part of the barrel body, and a boundary line component for balancing the height of the first annular cavity and the middle cavity or the middle cavity is further arranged in the barrel body.
Optionally, the ejection of compact pipeline includes lower part pipeline and upper portion pipeline, flexible section is installed to the lower extreme of lower part pipeline, the lower extreme of flexible section is equipped with the straight tube, install the float on the straight tube, the lower extreme of straight tube extends into below the liquid level of the liquid of middle part intracavity, lower part pipeline with be equipped with the reducing between the upper portion pipeline, make the pipe diameter of upper portion pipeline is less than the pipe diameter of lower part pipeline, the upper end of upper portion pipeline is equipped with transparent section, detection component installs in transparent section.
Optionally, the detection assembly includes a support frame, the support frame is sleeved on the transparent section of the upper pipeline, a light emitting end and a signal receiving end are respectively installed on two sides of the support frame, the light emitting end emits light towards the transparent section, and the signal receiving end receives the light passing through the transparent section.
Optionally, the charging conduit includes the helical tube way, discharge pipe is installed to the lower extreme of helical tube way, discharge pipe's pipe diameter is less than the pipe diameter of helical tube way, the helical tube way with install the check valve between the discharge pipe way.
Optionally, the partition subassembly includes the lifting electric jar, the lifting electric jar is installed the upper portion of barrel, vertical groove has been seted up along its length direction on the inner tube, slidable installs the partition panel in the vertical inslot, the output of lifting electric jar with the partition panel is connected.
Optionally, the balance assembly comprises a water adding pump, a water outlet end of the water adding pump extends into the middle cavity from the bottom, the middle cavity, the first annular cavity and the second annular cavity are internally provided with liquid level sensors, and the middle cavity, the first annular cavity and the lower portion of the second annular cavity are respectively provided with a liquid discharge pipe.
Optionally, the pressure control assembly comprises a pressure pump and an exhaust valve, and the pressure pump and the exhaust valve are both mounted on the upper portion of the cylinder body and are both communicated with the middle cavity.
Optionally, a flow stabilizing plate is installed in the first annular cavity and the second annular cavity, a plurality of through holes are uniformly distributed on the flow stabilizing plate, and a plurality of floats are installed on the upper surface of the flow stabilizing plate.
In another embodiment, the density of the flow stabilizer is between the density of benzene and the density of water, a sliding hole is formed in the flow stabilizer, the lower end of the feeding pipeline is slidably connected with the sliding hole, a plurality of flow guide grooves are formed in the flow stabilizer, the flow guide grooves are radially arranged on the surface of the flow stabilizer, a plurality of through holes are formed in the flow guide grooves, the flow stabilizer is provided with an outer annular surface and an inner annular surface, and the thickness of the flow stabilizer is gradually reduced from the outer annular surface to the inner annular surface.
Based on the above embodiment, a dehydration process of a pure benzene tower dehydration device is provided, which comprises the following steps:
adding a mixed solution of crude benzene and water to be dehydrated into the first annular cavity and the second annular cavity through two groups of feeding pipelines;
the balance assembly adds water into the middle cavity, so that the liquid level of the water in the middle cavity is the same as that of the mixed liquid in the first annular cavity;
the partition assembly between the first annular cavity and the middle cavity removes the partition to enable the first annular cavity to be communicated with the middle cavity, after the first annular cavity and the middle cavity are kept stand for a period of time, benzene is located on the upper layer of water, and the lower end of the discharge pipeline is in contact with the benzene located on the upper layer;
the pressure control assembly pressurizes the middle cavity, and benzene on the upper layer is discharged from the discharge pipeline under the action of pressure;
when the detection assembly detects the layered boundary line of benzene and water, the pressure control assembly stops pressurizing and releases the pressure of the middle cavity, the partition assembly between the first ring cavity and the middle cavity partitions the first ring cavity and the middle cavity again, the balance assembly enables the liquid level heights of the liquid in the middle cavity and the liquid in the second ring cavity to be the same, and benzene is discharged repeatedly.
The invention has the beneficial effects that: the invention is provided with two groups of feeding pipelines, a first ring cavity and a second ring cavity, the feeding is performed alternately through the two groups of feeding pipelines, when the mixed liquid of water and benzene in the first ring cavity is dehydrated, the mixed liquid in the other group is kept standing for waiting, further, the standing time is saved, the dehydration efficiency is improved, before the partition component opens the communication between the first ring cavity and the middle cavity, the liquid levels of the liquids in the first ring cavity and the middle cavity are adjusted to be consistent through a balance component, the fluctuation generated by the liquid flow when the partition component is opened is reduced, the benzene at the upper layer in the first ring cavity smoothly flows to the middle cavity, the pressure control component is arranged to pressurize the middle cavity, the benzene at the upper layer in the middle cavity is discharged through a discharge pipeline, the refractive index is different from that of water due to the lower density of the benzene, a bright interface can be seen between the layering boundary line of the benzene and the water, the detection component is used for detecting the interface of the benzene and the water, when the layering of the benzene and the water is detected, the dehydration effect is improved, and the dehydration effect of the dehydration of the benzene is improved.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a pure benzene column dehydration unit according to an embodiment of the present invention;
FIG. 2 is a schematic view of a cartridge according to an embodiment of the present invention;
FIG. 3 is a schematic view of a purified benzene column dehydration apparatus of an embodiment of the present invention with the protective cover removed;
FIG. 4 is a schematic view of a discharge conduit of an embodiment of the present invention;
FIG. 5 is an enlarged schematic view at A in FIG. 4;
FIG. 6 is a schematic diagram of a pure benzene tower dehydration device with the protective cover and the feeding pipeline removed according to an embodiment of the present invention;
FIG. 7 is a schematic view of the positions of the cylinder and the current stabilizer according to the embodiment of the present invention;
FIG. 8 is a schematic view of a stabilizer plate according to an embodiment of the present invention;
FIG. 9 is a first schematic view of a flow stabilizer in accordance with another embodiment of the present invention;
fig. 10 is a second schematic view of a flow stabilizer according to another embodiment of the present invention.
Labeled in the figure as:
1. a cylinder body; 2. an inner barrel; 3. a middle chamber; 4. a partition plate; 5. a first annular cavity; 6. a second annular cavity; 7. a feed line; 8. a discharge pipe; 9. a lower duct; 10. an upper pipe; 11. a telescopic section; 12. a straight pipe; 13. a float; 14. reducing diameter; 15. a transparent segment; 16. a support frame; 17. a light emitting end; 18. a signal receiving end; 19. lifting the electric cylinder; 20. a vertical slot; 21. a partition panel; 22. adding a water pump; 23. a liquid discharge pipe; 24. a pressure pump; 25. an exhaust valve; 26. a flow stabilizer; 27. a through hole; 28. floating; 29. a slide hole; 30. a diversion trench; 31. through the aperture.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments.
It is to be noted that technical terms or scientific terms used herein should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs, unless otherwise defined. The use of "first," "second," and the like, herein does not denote any order, quantity, or importance, but rather the terms "first," "second," and the like are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
A pure benzene tower dehydration device is shown in figures 1, 2 and 3 and comprises a barrel body 1, wherein an inner barrel 2 is arranged in the barrel body 1, the inner barrel 2 is arranged in the middle of the barrel body 1 and divides the interior of the barrel body 1 into a middle cavity 3 and an annular cavity, two partition plates 4 are arranged between the barrel body 1 and the inner barrel 2, the two partition plates 4 are symmetrically arranged and divide the annular cavity into a first annular cavity 5 and a second annular cavity 6, partition components are respectively arranged between the middle cavity 3 and the first annular cavity 5 and between the middle cavity 3 and the second annular cavity 6 and between the two partition components, the two partition components respectively control the connection and disconnection of the first annular cavity 5 and the middle cavity 3 and the connection and disconnection of the second annular cavity 6 and the middle cavity 3, two feeding pipelines 7 are arranged on two sides of the upper part of the barrel body 1, two sets of charging conduit 7 is linked together with first ring chamber 5 and second ring chamber 6 respectively, ejection of compact pipeline 8 is installed along vertical direction in the middle part on 1 upper portion of barrel, ejection of compact pipeline 8's lower extreme extends to in the middle part chamber 3 to contact with the liquid in the middle part chamber 3, ejection of compact pipeline 8's upper end upwards extends, runs through out outside barrel 1 to install determine module, determine module detects to the layering boundary line of benzene and water, barrel 1's upper portion still is installed to pressurized pressure control subassembly in the middle part chamber 3, still install in barrel 1 and be used for balanced first ring chamber 5 and middle part chamber 3 or second ring chamber 6 and the 3 liquid level's in the middle part chamber balance subassembly, still include the safety cover, protect charging conduit 7, ejection of compact pipeline 8 and pressure control subassembly.
The device comprises two groups of feeding pipelines 7, a first annular cavity 5 and a second annular cavity 6, wherein the two groups of feeding pipelines 7 are alternately fed, when the mixed liquid of water and benzene in the first annular cavity 5 is dehydrated, the mixed liquid in the other group is kept stand for waiting, the standing time is further saved, the dehydration efficiency is improved, before the partition component opens the communication between the first annular cavity 5 and the middle cavity 3, the liquid levels of the liquid in the first annular cavity 5 and the liquid in the middle cavity 3 are adjusted to be consistent through a balance component, the fluctuation generated by the liquid flow when the partition component is opened is reduced, the benzene on the upper layer in the first annular cavity 5 smoothly flows to the middle cavity 3, the benzene on the upper layer in the middle cavity 3 is discharged through a discharge pipeline 8 by arranging a pressure control component to pressurize the middle cavity 3, the benzene on the upper layer is not same as the refractive index is as the water because the density of the benzene is lower, a bright interface can be seen between the layered boundary lines of the benzene and the water, the detection component is used for detecting the content of the benzene and the coarse boundary line of the pressure control component, the dehydration effect of the benzene is improved when the coarse boundary line of the dehydration of the benzene and the dehydration is detected, and the dehydration effect of the dehydration is improved.
In an embodiment, as shown in fig. 4, the discharge pipeline 8 includes a lower pipeline 9 and an upper pipeline 10, a telescopic section 11 is installed at the lower end of the lower pipeline 9, a straight pipe 12 is arranged at the lower end of the telescopic section 11, a float 13 is installed on the straight pipe 12, the lower end of the straight pipe 12 extends below the liquid level of the liquid in the middle cavity 3, a reducing pipe 14 is arranged between the lower pipeline 9 and the upper pipeline 10, so that the pipe diameter of the upper pipeline 10 is smaller than that of the lower pipeline 9, a transparent section 15 is arranged at the upper end of the upper pipeline 10, and the detection component is installed on the transparent section 15.
The straight pipe 12 always floats on the liquid level of the liquid in the middle cavity 3 through the floater 13, the lower end of the straight pipe 12 is inserted below the liquid level, when the liquid level descends, the telescopic section 11 extends to ensure that the straight pipe 12 is always positioned below the liquid level, the liquid is conveniently discharged from the discharge pipeline 8, the pipe diameter of the upper pipeline 10 is far smaller than that of the lower pipeline 9, the size of the displayed layering boundary line of benzene and water is reduced, the detection assembly can conveniently detect the layering boundary line of the benzene and the water, and meanwhile, the detection assembly is also favorable for discharging more benzene.
Specifically, as shown in fig. 5, the detection assembly includes a support frame 16, the support frame 16 is sleeved on the transparent section 15 of the upper pipeline 10, a light emitting end 17 and a signal receiving end 18 are respectively installed on two sides of the support frame 16, the light emitting end 17 emits light toward the transparent section 15, and the signal receiving end 18 receives the light passing through the transparent section 15. When the layered boundary line of benzene and water enters the transparent section 15, the light received by the signal receiving end 18 fluctuates, when the signal receiving end 18 detects the fluctuation of the light, the discharge of benzene can be stopped, a small amount of benzene can be remained in the discharge pipeline 8, and the water is prevented from being discharged, so that the benzene is not thoroughly dehydrated.
In one embodiment, the feeding pipeline 7 comprises a spiral pipeline, a discharge pipeline is installed at the lower end of the spiral pipeline, the pipe diameter of the discharge pipeline is smaller than that of the spiral pipeline, and a one-way valve is installed between the spiral pipeline and the discharge pipeline. Set charging conduit 7 to the spiral pipeline, make the mixed liquid receive certain centrifugal force effect when the spiral pipeline flows, can accelerate the layering of benzene and water, and then reduce the time of stewing, install the check valve between spiral pipeline and discharge line, when pressurizeing middle part chamber 3, the setting of check valve does benefit to the pressurize in the barrel 1.
In one embodiment, as shown in fig. 6, the partition assembly includes a lifting electric cylinder 19, the lifting electric cylinder 19 is installed on the upper portion of the cylinder 1, a vertical groove 20 is opened on the inner cylinder 2 along the length direction thereof, a partition plate 21 is slidably installed in the vertical groove 20, and an output end of the lifting electric cylinder 19 is connected to the partition plate 21.
In an embodiment, the balance assembly includes a water adding pump 22, the water outlet end of the water adding pump 22 extends into the middle cavity 3 from the bottom, the middle cavity 3, the first annular cavity 5 and the second annular cavity 6 are all provided with liquid level sensors, and the middle cavity 3, the first annular cavity 5 and the lower part of the second annular cavity 6 are all provided with a liquid discharge pipe 23.
Wherein, detect the height of liquid level through level sensor, when the liquid level in middle part chamber 3 is less than the liquid level height in first ring chamber 5 or the second ring chamber 6, add water through adding water pump 22 and adjust, when the liquid level in middle part chamber 3 was too high, outwards discharged the water that is located the bottom by fluid-discharge tube 23.
In one embodiment, the pressure control assembly comprises a pressurization pump 24 and an exhaust valve 25, wherein the pressurization pump 24 and the exhaust valve 25 are both mounted on the upper part of the cylinder 1 and are both communicated with the middle cavity 3. When the pressure needs to be applied to the middle chamber 3, the pressure is applied by the pressure application pump 24, and when the pressure needs to be discharged, the exhaust valve 25 is opened to release the pressure in the middle chamber 3.
In one embodiment, a flow stabilizing structure is mounted in each of the first annular cavity 5 and the second annular cavity 6.
Specifically, as shown in fig. 7 and 8, the flow stabilizing structure includes a flow stabilizing plate 26, a plurality of through holes 27 are uniformly distributed on the flow stabilizing plate 26, and a plurality of floats 28 are mounted on the upper surface of the flow stabilizing plate 26.
The flow stabilizing plate 26 floats above the liquid level through the float 28, and the liquid entering the first annular cavity 5 or the second annular cavity 6 is quickly stabilized when the flow stabilizing plate 26 is arranged, so that the standing time is further shortened, and the dehydration efficiency is improved.
In another embodiment, the density of the flow stabilizer is between the density of benzene and the density of water, specifically, the flow stabilizer may be modified by foaming or made into a hollow structure, and then the flow stabilizer is filled with a substance with a lighter texture to change the density of the flow stabilizer, so as to adjust the density of the flow stabilizer to be between the density of benzene and the density of water, so that the flow stabilizer floats between benzene and water, the flow stabilizer is provided with a sliding hole 29, the lower end of the feeding pipe is slidably connected with the sliding hole, the flow stabilizer is provided with a plurality of flow guide grooves 30, the flow guide grooves 30 are radially arranged on the surface of the flow stabilizer, the flow guide grooves 30 are provided with a plurality of through holes 31, the flow stabilizer has an outer annular surface and an inner annular surface, and the thickness of the flow stabilizer gradually decreases from the outer annular surface to the inner annular surface. As the benzene level decreases as it is discharged outwardly, the benzene within the first or second annular chamber 5, 6 will flow along the channels toward the middle chamber 3 to allow more benzene to be discharged.
Based on the above embodiment, a dehydration process of a pure benzene tower dehydration device is provided, which comprises the following steps:
adding a mixed solution of crude benzene and water to be dehydrated into the first annular cavity 5 and the second annular cavity 6 through two groups of feeding pipelines 7;
adding water into the middle cavity 3 by using a water adding pump 22 to ensure that the liquid level of the water in the middle cavity 3 is the same as that of the mixed liquid in the first annular cavity 5;
the partition component between the first annular cavity 5 and the middle cavity 3 is removed, the electric cylinder 19 is lifted to drive the partition plate 21 to move upwards, so that the first annular cavity 5 is communicated with the middle cavity 3, benzene and water are layered after standing for a period of time, the benzene is positioned at the upper layer of the water, and the lower end of the straight pipe 12 is inserted below the liquid level;
the pressurizing pump 24 pressurizes the middle cavity 3, and the benzene on the upper layer is discharged from the discharge pipeline 8 under the action of pressure;
when the detection component detects the layering boundary line of benzene and water, the booster pump 24 stops pressurizing, the exhaust valve 25 is opened, the middle cavity 3 is decompressed, the partition component between the first annular cavity 5 and the middle cavity 3 partitions the first annular cavity 5 and the middle cavity 3 again, the balance component enables the liquid level height of liquid in the middle cavity 3 and the second annular cavity 6 to be the same, the partition component between the second annular cavity 6 and the middle cavity 3 is opened, the liquid in the second annular cavity 6 flows to the middle cavity 3, the benzene exhaust operation is repeated, and the circulation is realized.
According to the invention, the pressure control assembly and the discharge pipeline 8 are arranged, benzene is discharged from the upper part, and when the detection assembly detects the layered boundary line of the benzene and the water, the discharge of the benzene is stopped, so that the content of water in the benzene during dehydration is reduced, and the effect of dehydrating crude benzene is improved.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The present invention is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a pure benzene tower dewatering device, includes barrel (1), its characterized in that, be equipped with inner tube (2) in barrel (1), inner tube (2) will divide into middle part chamber (3) and annular chamber in barrel (1), barrel (1) with install two baffle (4) between inner tube (2), two baffle (4) will the annular chamber is divided into first ring chamber (5) and second ring chamber (6), middle part chamber (3) with first ring chamber (5) with be equipped with between second ring chamber (6) and cut off the subassembly, two sets of cut off the break-make of subassembly first ring chamber (5) and middle part chamber (3) and second ring chamber (6) respectively with middle part chamber (3), two sets of pipeline (7) are installed to the both sides on barrel (1) upper portion, two sets of pipeline (7) are linked together with first ring chamber (5) and second ring chamber (6) respectively to cut off the subassembly, the middle part on barrel (1) upper portion is installed along vertical direction and is gone up discharge pipeline (8), the lower extreme extension of discharge pipeline (8) extends to the middle part chamber (3) and detection assembly, detection subassembly still detects the liquid pressure control subassembly and detection component, detection to the upper portion of barrel (1) and detection chamber (3) and detection module (8), and a balance assembly for balancing the liquid level heights of the first annular cavity (5) and the middle cavity (3) or the second annular cavity (6) and the middle cavity (3) is further arranged in the barrel body (1).
2. The pure benzene tower dewatering device according to claim 1, wherein the discharge pipeline (8) comprises a lower pipeline (9) and an upper pipeline (10), a telescopic section (11) is installed at the lower end of the lower pipeline (9), a straight pipe (12) is arranged at the lower end of the telescopic section (11), a floater (13) is installed on the straight pipe (12), the lower end of the straight pipe (12) extends below the liquid level of the liquid in the middle cavity (3), a reducing pipe (14) is arranged between the lower pipeline (9) and the upper pipeline (10), the pipe diameter of the upper pipeline (10) is smaller than that of the lower pipeline (9), a transparent section (15) is arranged at the upper end of the upper pipeline (10), and the detection assembly is installed on the transparent section (15).
3. The pure benzene tower dewatering device of claim 1, wherein the detection assembly comprises a support frame (16), the support frame (16) is sleeved on a transparent section (15) of the upper pipeline (10), a light emitting end (17) and a signal receiving end (18) are respectively installed on two sides of the support frame (16), the light emitting end (17) emits light towards the transparent section (15), and the signal receiving end (18) receives the light passing through the transparent section (15).
4. The pure benzene tower dewatering device according to claim 1, wherein the feeding pipe (7) comprises a spiral pipe, a discharge pipe is installed at the lower end of the spiral pipe, the pipe diameter of the discharge pipe is smaller than that of the spiral pipe, and a one-way valve is installed between the spiral pipe and the discharge pipe.
5. The pure benzene tower dehydration device according to claim 1, characterized in that the partition component comprises a lifting electric cylinder (19), the lifting electric cylinder (19) is installed on the upper portion of the cylinder body (1), a vertical groove (20) is opened on the inner cylinder (2) along the length direction thereof, a partition plate (21) is slidably installed in the vertical groove (20), and the output end of the lifting electric cylinder (19) is connected with the partition plate (21).
6. The pure benzene tower dehydration device according to claim 1, wherein the balance component comprises a water adding pump (22), the water outlet end of the water adding pump (22) extends into a middle cavity (3) from the bottom, liquid level sensors are installed in the middle cavity (3), the first annular cavity (5) and the second annular cavity (6), and a liquid discharge pipe (23) is installed at the lower parts of the middle cavity (3), the first annular cavity (5) and the second annular cavity (6).
7. The pure benzene tower dehydration device according to claim 1, characterized in that the pressure control assembly comprises a pressurization pump (24) and an exhaust valve (25), the pressurization pump (24) and the exhaust valve (25) are both installed on the upper part of the cylinder (1) and are both communicated with the middle chamber (3).
8. The pure benzene tower dehydration device according to claim 1, characterized in that a flow stabilizer (26) is installed in both the first annular cavity (5) and the second annular cavity (6), a plurality of through holes (27) are evenly distributed on the flow stabilizer (26), and a plurality of floats (28) are installed on the upper surface of the flow stabilizer (26).
9. The pure benzene tower dehydration device according to claim 8, wherein the density of the flow stabilizer is between the density of benzene and the density of water, the flow stabilizer is provided with a sliding hole (29), the lower end of the feeding pipe (7) is slidably connected with the sliding hole (29), the flow stabilizer is provided with a plurality of flow guide grooves (30), the flow guide grooves (30) are radially arranged on the surface of the flow stabilizer, the flow guide grooves (30) are provided with a plurality of through holes (31), the flow stabilizer is provided with an outer annular surface and an inner annular surface, and the thickness of the flow stabilizer gradually decreases from the outer annular surface to the inner annular surface.
10. A dehydration process of the pure benzene tower dehydration device according to any one of claims 1 to 9, characterized by comprising the steps of:
adding a mixed solution of crude benzene and water to be dehydrated into the first annular cavity (5) and the second annular cavity (6) through two groups of feeding pipelines (7);
the balance component adds water into the middle cavity (3) to ensure that the liquid level of the water in the middle cavity (3) is the same as that of the mixed liquid in the first annular cavity (5);
the partition assembly between the first annular cavity (5) and the middle cavity (3) is separated, so that the first annular cavity (5) is communicated with the middle cavity (3), benzene is positioned on the upper layer of water after standing for a period of time, and the lower end of the discharge pipeline (8) is contacted with the benzene on the upper layer;
the pressure control assembly pressurizes the middle cavity (3), and benzene on the upper layer is discharged from a discharge pipeline (8) under the action of pressure;
when the detection assembly detects the layering boundary line of benzene and water, the pressure control assembly stops the pressurization and carries out the pressure release to middle part chamber (3), and first ring chamber (5) and middle part chamber (3) are cut off once more to the wall subassembly between first ring chamber (5) and middle part chamber (3), and the liquid level height that the balanced subassembly made the liquid in middle part chamber (3) and second ring chamber (6) is the same, repeats benzene exhaust's operation.
Priority Applications (1)
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