CN113750560B - Rectifying column is used in production of 2, 4-dichlorophenol - Google Patents
Rectifying column is used in production of 2, 4-dichlorophenol Download PDFInfo
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- CN113750560B CN113750560B CN202111069305.4A CN202111069305A CN113750560B CN 113750560 B CN113750560 B CN 113750560B CN 202111069305 A CN202111069305 A CN 202111069305A CN 113750560 B CN113750560 B CN 113750560B
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- plate
- sieve
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- HFZWRUODUSTPEG-UHFFFAOYSA-N 2,4-dichlorophenol Chemical compound OC1=CC=C(Cl)C=C1Cl HFZWRUODUSTPEG-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000007788 liquid Substances 0.000 claims abstract description 63
- 238000007790 scraping Methods 0.000 claims abstract description 53
- 239000011148 porous material Substances 0.000 claims description 7
- 230000002441 reversible effect Effects 0.000 claims description 4
- 239000012535 impurity Substances 0.000 abstract description 29
- 239000011550 stock solution Substances 0.000 abstract description 27
- 238000004140 cleaning Methods 0.000 abstract description 16
- 238000001125 extrusion Methods 0.000 abstract description 13
- 239000007789 gas Substances 0.000 description 70
- 238000000034 method Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- 230000005587 bubbling Effects 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- UMPSXRYVXUPCOS-UHFFFAOYSA-N 2,3-dichlorophenol Chemical compound OC1=CC=CC(Cl)=C1Cl UMPSXRYVXUPCOS-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
- B01D3/324—Tray constructions
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
- C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
- C07C37/74—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by distillation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention belongs to the technical field of rectifying towers, in particular to a rectifying tower for producing 2, 4-dichlorophenol, which comprises a tower body, a heat exchanger, a reboiler, a motor, a liquid inlet pipe and a condenser; the top of the tower body is fixedly connected with a condenser, the position, close to the condenser, of the outer surface of the tower body is fixedly connected with a heat exchanger, the outer surface of the tower body is fixedly connected with a reboiler corresponding to the position below the heat exchanger, the position, far away from the heat exchanger, of the outer surface of the tower body is fixedly connected with a liquid inlet pipe, and the position, close to the bottom of the tower body, of the outer surface of the tower body is fixedly connected with an air inlet pipe; a group of tower plates are uniformly and fixedly connected in the tower body, the tower plates are arc-shaped, and the tower plates are arranged in a staggered manner; when the scraping plate moves to contact with the tower plate, the scraping plate is not limited by extrusion force, the telescopic rod stretches to drive the scraping plate to be attached to the arc-shaped inner surface of the tower plate, the scraping plate scrapes the bottom of the tower plate, impurities deposited on the surface of the tower plate in the stock solution are scraped, and the impurities flow down along with the stock solution from the liquid-falling plate, so that the cleaning degree of the surface of the tower plate is increased.
Description
Technical Field
The invention belongs to the technical field of rectifying towers, and particularly relates to a rectifying tower for producing 2, 4-dichlorophenol.
Background
The rectifying tower is a tower type gas-liquid contacting device for rectifying. By utilizing the characteristic that each component in the mixture has different volatility, namely the vapor pressure of each component is different at the same temperature, the light component (low-boiling-point substance) in the liquid phase is transferred to the gas phase, and the heavy component (high-boiling-point substance) in the gas phase is transferred to the liquid phase, so that the purpose of separation is realized. The application of the catalyst in the chemical production of 2, 4-dichlorophenol is roughly divided into a plate tower and a packed tower, wherein the plate tower is widely applied.
A technical scheme of a rectifying tower for producing 2, 4-dichlorophenol also appears in the prior art, for example, a chinese patent with application number of CN2017207591622 discloses a tray rectifying tower, which comprises a tower body and a plurality of trays, the trays divide the tower body into a plurality of rectifying cavities, and the pressure regulating mechanism comprises a transverse tube and a branch tube; one end of the transverse pipe is communicated with the rectification cavity, and one end of the branch pipe is communicated with the other rectification cavity; the other end of the branch pipe is communicated with the transverse pipe; the other end of the branch pipe is communicated with the transverse pipe; a sliding block and an elastic piece are further arranged in the transverse tube, one end of the elastic piece is fixed at one end of the transverse tube far away from the rectification cavity, and the other end of the elastic piece is fixedly connected with the sliding block; however, the technical scheme is insufficient, the pressure regulating mechanism is linearly arranged along the tower body from bottom to top, and is sequentially communicated with adjacent rectifying cavities, so that the pressure regulating effect is optimized, and the anti-flooding effect is optimal.
In view of the above, the present invention provides a rectifying tower for producing 2, 4-dichlorophenol, which solves the above problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a rectifying tower for 2, 4-dichlorophenol production, which solves the problems that when dichlorophenol is rectified, raw liquid and gas are in contact reaction to generate dichlorophenol, impurities after reaction flow to the positions of sieve holes along with the raw liquid, after long-time rectification work, the sieve holes are blocked by excessive accumulation of impurities, and the flow rate of gas passing through the sieve holes is reduced, so that partial gas flows from bottom to top through a liquid dropping channel under the influence of air pressure, and thus, the phenomenon of flooding occurs in the tower.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a rectifying tower for producing 2, 4-dichlorophenol, which comprises a tower body, a heat exchanger, a reboiler, a motor, a liquid inlet pipe and a condenser; the top of the tower body is fixedly connected with a condenser, the position, close to the condenser, of the outer surface of the tower body is fixedly connected with a heat exchanger, the outer surface of the tower body is fixedly connected with a reboiler corresponding to the position below the heat exchanger, the position, far away from the heat exchanger, of the outer surface of the tower body is fixedly connected with a liquid inlet pipe, and the position, close to the bottom of the tower body, of the outer surface of the tower body is fixedly connected with an air inlet pipe; a group of tower plates are uniformly and fixedly connected in the tower body, the tower plates are arc-shaped, the tower plates are arranged in a staggered manner, and when the tower is in operation, liquid flows down in an arch-shaped manner through the tower plates; the liquid dropping device is characterized in that a liquid dropping plate is fixedly connected to the liquid dropping position in the tower plate, the liquid dropping plate is vertically downward, and a group of sieve holes are uniformly formed in the tower plate; the inner wall of the tower body is rotatably connected with a rotating rod corresponding to the position above each tower plate, and the axial position of the rotating rod is fixedly arranged; the telescopic rods are fixedly connected to one end of the rotating rods, which is located in the tower body, and the arc-shaped scraping plates are fixedly connected to one end of the telescopic rods, which is far away from the rotating rods; a motor is fixedly connected below the corresponding rotating rod on the outer surface of the tower body, and a worm is fixedly connected to the output end of the motor and is in contact with the rotating rod; the positions of the rotating rods, which are contacted with the worm, are fixedly connected with gears, and threads of the corresponding gears in the worm are staggered.
When the device is used, during rectification treatment of 2, 4-dichlorophenol on a raw liquid, the raw liquid is added into a plate type rectifying tower through a liquid inlet pipe, gas is conveyed into the tower body through an air inlet pipe on the tower body, a motor and a reboiler are started, the raw liquid enters the tower body and flows through a tower plate, the tower plate is arranged in a bow-shaped staggered mode, so that the raw liquid flows to the bottom of the tower, the gas enters the tower body to move to the top of the tower, the gas is bubbled out of the raw liquid through a sieve hole on the tower plate, the gas is reacted with the raw liquid to form 2, 4-dichlorophenol after bubbling, the gas carries 2, 4-dichlorophenol steam to move to the top of the tower until contacting with a condenser, the condenser liquefies the 2, 4-dichlorophenol steam into 2, 4-dichlorophenol liquid, the heat exchanger discharges the treated 2, 4-dichlorophenol liquid, the staff collects the 2, 4-dichlorophenol liquid, and the treated solution is discharged into the tower body again; the motor drives the worm to move, the worm drives the gear to move, the gear on the worm corresponding to the first rotating rod is a clockwise thread, the gear on the worm corresponding to the second rotating rod is a counterclockwise thread, the gear on the worm corresponding to the third rotating rod is a clockwise thread, the threads on the worm are staggered, so that the worm drives the first rotating rod to rotate positively to drive the second rotating rod to rotate reversely, the worm drives the rotating rod to move, the rotating rod drives the telescopic rod to move, and the telescopic rod drives the scraping plate to move; when the scraping plate moves to the inner wall of the tower body, the scraping plate is extruded by the inner wall of the tower body, and the scraping plate drives the telescopic rod to retract towards the direction of the rotating rod; when the scraping plate moves to contact with the tower plate, the scraping plate is not limited by extrusion force, the telescopic rod stretches to drive the scraping plate to be attached to the arc-shaped inner surface of the tower plate, the scraping plate scrapes the bottom of the tower plate, impurities deposited on the surface of the tower plate in the stock solution are scraped, so that the impurities flow down along with the stock solution from the liquid falling plate, the cleaning degree of the surface of the tower plate is increased, excessive impurities deposited on the surface of the tower plate are prevented from blocking sieve holes in the long-time production process, flooding phenomenon occurs in the tower body, and the working efficiency of the plate type rectifying tower is affected; through setting up the scraper blade, when the scraper blade moves to the tray bottommost position, the one end that the scraper blade was kept away from the tray is located the tray within range to make the scraper blade scrape the internal surface of tray, scrape the stoste that is located the tray bottom and move, flow down from the liquid-falling plate, increase the flow efficiency of stoste, thereby increase rectification efficiency, prevent that the stoste from receiving the influence of tray arc bottom and leading to the reduction of the flow velocity of the stoste bottom, cause gaseous phase and liquid phase contact efficiency to reduce, thereby reduce rectification efficiency; after the crude liquid flows to the bottom of the tower, the crude liquid enters a reboiler through a pipeline, the reboiler is used for discharging waste liquid after the crude liquid at the bottom of the tower is treated, and the reboiler is used for discharging the crude liquid which is not rectified into the tower again.
Preferably, the sieve pores are all reverse taper type, and the pore diameter of the sieve pores far away from the bottom of the tower body is large, and the pore diameter of the sieve pores near the bottom of the tower body is small.
When the device is used, through setting up the sieve mesh into the back taper hole, when gas passes through the sieve mesh bubbling and goes out, the gas gets into along sieve mesh inner wall flow, because the sieve mesh inner wall is loudspeaker form, make gas in the one end that the aperture is big in passing through the sieve mesh, the internal volume of sieve mesh increases, the flow of the one end that the aperture is big in the gas flow through the sieve mesh increases, make gas need more gas flow when the one end that the aperture is big in the flow through the sieve mesh, thereby make the velocity of flow of gas pass through the sieve mesh reduce, the gas velocity of flow reduce the back and the stock solution contact reaction time increase on the column plate, make stock solution on the column plate fully contact with gas, increase the rectification efficiency of stock solution, thereby increase the work efficiency of plate-type rectifying column, prevent that the velocity of flow is too fast after the gas passes through the sieve mesh, result in gas and stock solution contact reaction time is insufficient, thereby reduce the rectification efficiency of stock solution, influence the work efficiency of plate-type rectifying column.
Preferably, annular grooves are formed in the scraping plates corresponding to the positions of the sieve holes, sleeves are sleeved at the positions of the annular grooves, a group of first rods are fixedly connected to the outer surfaces of the sleeves uniformly in a circumference mode, and the diameters of the first rods are smaller than the diameters of the small holes in the sieve holes.
When the scraper is used, the rotating rod drives the telescopic rod to move, and the telescopic rod drives the scraper to move; when the scraping plate moves to the inner wall of the tower body, the scraping plate is extruded by the inner wall of the tower body, and the scraping plate drives the telescopic rod to retract towards the direction of the rotating rod; when the scraping plate moves to contact with the tower plate, the scraping plate is not limited by the extrusion force, and the telescopic rod stretches to drive the scraping plate to be attached to the arc-shaped inner surface of the tower plate; the tray moves to drive the sleeve to move, and the sleeve drives the first rod to move; when a pole motion to sieve mesh position, a pole is kept away from telescopic one end and is passed the small one end in the sieve mesh for a pole dredges the sieve mesh, extrudes the impurity in the sieve mesh, increases the clean degree of sieve mesh, thereby increases gas flow efficiency, and then increases the rectification efficiency of stoste, prevents impurity in the stoste and gets into the sieve mesh, leads to the sieve mesh to block up, thereby influences gas flow efficiency.
Preferably, one end of the first rod far away from the sleeve is provided with rollers, and the surfaces of the rollers are smooth.
During the use, keep away from telescopic one end through the pole and set up the roller, when the sieve mesh position is crossed in the scraper blade motion, the scraper blade drives the sleeve motion, the sleeve drives the pole motion, first pole receives the spacing effect stop motion of sieve mesh for the sleeve rotates on the scraper blade, the sleeve drives the pole motion of second, the pole drives the roller motion to contact tray arc internal surface of second, the roller rolls on the arc internal surface of tray, make the arc internal surface sliding friction of pole and tray change into rolling friction, reduce the loss that produces because of the friction between the spare part, thereby protect the spare part, increase the life between the spare part, reduce manufacturing cost.
Preferably, a spiral groove is formed in one end, far away from the sleeve, of the telescopic rod, an inverted conical lantern ring is sleeved at the position, located in the spiral groove, of the telescopic rod, the lantern ring is in sliding connection with the telescopic rod, and a group of balls are arranged between the inner wall of the lantern ring and the spiral groove; the telescopic rod is fixedly connected with a fixing ring at a position close to the lantern ring, and the fixing ring is connected with the lantern ring through a reset spring.
When the first rod moves to the position of the sieve hole, the first rod enters the sieve hole under the influence of gravity, the inner wall of the sieve hole contacts with the outer surface of the lantern ring, the first rod gradually stretches into the sieve hole, the lantern ring is extruded by the inner wall of the sieve hole, the lantern ring is extruded to spirally move along the spiral groove towards the direction close to the fixed ring by the ball, the outer surface of the lantern ring rubs against the inner wall of the sieve hole, impurities on the inner wall of the sieve hole are removed by friction, the cleaning degree of the inner wall of the sieve hole is increased, and the accumulation of impurities on the inner wall of the sieve hole is prevented; when the first rod moves to be vertical to the sieve holes, the inner walls of the sieve holes are attached to the outer surfaces of the lantern rings; when the sieve mesh is passed over in the motion of a pole, the extrusion force that the lantern ring received the sieve mesh inner wall reduces, and reset spring drives the lantern ring and resets, and the lantern ring rubs the inner wall of another part in the sieve mesh at the in-process that resets, and impurity friction removal on the inner wall of another part in the sieve mesh further increases the clean degree of sieve mesh inner wall to increase gas flow efficiency, and then increase rectification efficiency.
Preferably, the outer surface of the lantern ring is fixedly connected with a blade, and the inclination direction of the blade is the same as that of the outer surface of the lantern ring.
When the novel sieve mesh is used, the blades are arranged on the surface of the sleeve ring, when the first rod moves to the position of the sieve mesh, the first rod is affected by gravity and enters the sieve mesh, the inner wall of the sieve mesh contacts the outer surface of the sleeve ring, the first rod gradually stretches into the sieve mesh, the inner wall of the sieve mesh extrudes the sleeve ring through the blades, the sleeve ring is extruded to move spirally along the spiral groove towards the direction close to the fixed ring through the balls, the movement of the sleeve ring drives the blades to move, one end of the blades, far away from the sleeve ring, scrapes the inner wall of the sieve mesh, the blades scrape impurities on the inner wall of the sieve mesh, and the cleaning degree of the inner wall of the sieve mesh is increased, so that the cleaning degree of the sieve mesh is increased, and the gas flow efficiency is increased; when the first rod moves to be in a vertical state with the sieve holes, one end of the blade, which is far away from the lantern ring, is attached to the inner wall of the sieve holes, and a gap is formed between the lantern ring and the inner wall of the sieve holes, so that gas can still pass through the first rod when the sieve holes are cleaned, the gas flow efficiency is increased, and the rectification efficiency is further increased; when the first pole moves and passes through the sieve mesh, the extrusion force of the blade on the inner wall of the sieve mesh is reduced, and the extrusion force of the blade on the lantern ring is reduced, so that the reset spring drives the lantern ring to reset, and the lantern ring drives the blade to scrape the inner wall of the other part of the sieve mesh in the reset process, so that the cleaning degree of the inner wall of the sieve mesh is further increased.
The beneficial effects of the invention are as follows:
1. according to the rectifying tower for producing 2, 4-dichlorophenol, through the cooperation between the scraping plate and the tower plate, when the scraping plate moves to contact with the tower plate, the scraping plate is not limited by extrusion force, the expansion plate stretches to drive the scraping plate to be attached to the arc-shaped inner surface of the tower plate, the scraping plate scrapes the bottom of the tower plate, impurities deposited on the surface of the tower plate in stock solution are scraped, so that the impurities flow down along with the stock solution from the liquid-reducing plate, and the cleaning degree of the surface of the tower plate is increased.
2. According to the rectifying tower for producing 2, 4-dichlorophenol, the sieve holes are the inverted cone holes, when gas is bubbled out through the sieve holes, the gas enters from the end with small hole diameter in the sieve holes to flow to the tower top along the inner wall of the sieve holes, and the flow rate of the gas flowing through the end with large hole diameter in the sieve holes is increased, so that the flow rate of the gas flowing through the sieve holes is reduced, the raw liquid on the tower plate is fully contacted with the gas, the rectifying efficiency of the raw liquid is increased, and the working efficiency of the plate rectifying tower is increased.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic view of a construction of the present invention;
FIG. 3 is a schematic view of another construction of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a partial enlarged view at B in FIG. 4;
FIG. 6 is an enlarged view of a portion of FIG. 4 at C;
in the figure: tower 1, heat exchanger 11, reboiler 12, motor 13, feed pipe 14, condenser 15, intake pipe 16, tray 2, liquid-falling plate 21, mesh 22, rotating rod 3, telescopic rod 31, scraper 32, worm 33, gear 34, annular groove 35, sleeve 36, rod number 4, roller 41, spiral groove 42, collar 43, ball 44, fixed ring 45, blade 46.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 6, the rectifying tower for producing 2, 4-dichlorophenol comprises a tower body 1, a heat exchanger 11, a reboiler 12, a motor 13, a liquid inlet pipe 14 and a condenser 15; the top of the tower body 1 is fixedly connected with a condenser 15, the position, close to the condenser 15, of the outer surface of the tower body 1 is fixedly connected with a heat exchanger, the position, corresponding to the lower part of the heat exchanger, of the outer surface of the tower body 1 is fixedly connected with a reboiler 12, the position, far away from the heat exchanger, of the outer surface of the tower body 1 is fixedly connected with a liquid inlet pipe 14, and the position, close to the bottom of the tower body 1, of the outer surface of the tower body 1 is fixedly connected with an air inlet pipe 16; a group of tower plates 2 are uniformly and fixedly connected in the tower body 1, the tower plates 2 are arc-shaped, the tower plates 2 are arranged in a staggered manner, and when the tower is in operation, liquid flows down through the tower plates 2 in an arc-shaped manner; the liquid dropping device is characterized in that a liquid dropping plate 21 is fixedly connected to the liquid dropping position in the tower plate 2, the liquid dropping plate 21 is vertically downward, and a group of sieve holes 22 are uniformly formed in the tower plate 2; the inner wall of the tower body 1 is rotatably connected with a rotating rod 3 corresponding to the position above each tower plate 2, and the axial position of the rotating rod 3 is fixedly arranged; the telescopic rods 31 are fixedly connected to one end of the rotating rods 3, which is positioned in the tower body 1, and the arc scraping plates 32 are fixedly connected to one end of the telescopic rods 31, which is far away from the rotating rods 3; a motor 13 is fixedly connected below the outer surface of the tower body 1 corresponding to the rotating rod 3, and a worm 33 is fixedly connected to the output end of the motor 13, and the worm 33 is in contact with the rotating rod 3; the positions of the rotating rod 3, which are contacted with the worm 33, are fixedly connected with gears 34, and threads of the corresponding gears 34 in the worm 33 are staggered.
When the rectifying device is used, during rectifying treatment of 2, 4-dichlorophenol on a raw liquid, the raw liquid is added into a plate rectifying tower through a liquid inlet pipe 14, gas is conveyed into the tower body 1 through an air inlet pipe 16 on the tower body 1, a motor 13 and a reboiler 12 are started, the raw liquid enters the tower body 1 and flows through a tower plate 2, the tower plate 2 is arranged in a bow-shaped staggered manner, so that the raw liquid flows to the bottom of the tower, the gas enters the tower body 1 and moves to the top of the tower, the raw liquid is bubbled in the tower plate 2 through a sieve mesh 22 on the tower plate 2 to be discharged, the gas reacts with the raw liquid after bubbling to form 2, 4-dichlorophenol, the gas carries 2, 4-dichlorophenol steam to move to the top of the tower until contacting with a condenser 15, the condenser 15 liquefies the 2, 4-dichlorophenol steam into 2, 4-dichlorophenol liquid, the heat exchanger 11 discharges the treated 2, 4-dichlorophenol, the 2, the working staff collects the 2-dichlorophenol, and the treated solution is discharged into the tower body 1 again; the motor 13 drives the worm 33 to move, the worm 33 drives the gear 34 to move, the worm 33 corresponds to the gear 34 on the first rotating rod 3 and is clockwise, the gear 34 corresponds to the second rotating rod 3 and is anticlockwise, the gear 34 corresponds to the third rotating rod 3 and is clockwise, the threads on the worm 33 are staggered, so that the worm 33 drives the first rotating rod 3 to rotate positively to drive the second rotating rod 3 to rotate reversely, the worm 33 drives the rotating rod 3 to move, the rotating rod 3 drives the telescopic rod 31 to move, and the telescopic rod 31 drives the scraping plate 32 to move; when the scraping plate 32 moves to the inner wall of the tower body 1, the scraping plate 32 is extruded by the inner wall of the tower body 1, and the scraping plate 32 drives the telescopic rod 31 to retract towards the rotating rod 3; when the scraping plate 32 moves to contact with the tray 2, the scraping plate 32 is not limited by extrusion force, the telescopic rod 31 stretches to drive the scraping plate 32 to be attached to the arc-shaped inner surface of the tray 2, the scraping plate 32 scrapes the bottom of the tray 2, impurities deposited on the surface of the tray 2 in stock solution are scraped, so that the impurities flow down along with the stock solution from the position of the liquid-falling plate 21, the cleaning degree of the surface of the tray 2 is increased, excessive impurities deposited on the surface of the tray 2 in the long-time production process are prevented, the sieve holes 22 are blocked, so that flooding phenomenon occurs in the tower body 1, a flooding tower is caused, and the working efficiency of the plate-type rectifying tower is influenced; by arranging the scraping plate 32, when the scraping plate 32 moves to the bottommost position of the tray 2, one end of the scraping plate 32 far away from the tray 2 is positioned in the range of the tray 2, so that when the scraping plate 32 scrapes the inner surface of the tray 2, the stock solution positioned at the bottom of the tray 2 is scraped and flows down from the liquid falling plate 21, the flow efficiency of the stock solution is increased, the rectification efficiency is increased, the reduction of the flow rate of the stock solution at the bottom of the tray 2 caused by the influence of the arc-shaped bottom of the tray 2 is prevented, the reduction of the contact efficiency of gas phase and liquid phase is caused, and the rectification efficiency is reduced; after flowing to the bottom of the tower, the raw liquid enters a reboiler 12 through a pipeline, the reboiler 12 processes the raw liquid at the bottom of the tower body 1 and then discharges waste liquid, and the reboiler 12 discharges the raw liquid which is not rectified into the tower body 1 again.
Preferably, the sieve holes 22 are all reverse taper shaped, and the aperture of the sieve holes 22 far away from the bottom of the tower body 1 is large, and the aperture of the sieve holes 22 close to the bottom of the tower body 1 is small.
When the device is used, through setting the sieve holes 22 to be reverse taper holes, when gas is bubbled out through the sieve holes 22, the gas enters from the small-aperture end of the sieve holes 22 to flow along the inner wall of the sieve holes 22 to the top of the tower, because the inner wall of the sieve holes 22 is in a horn shape, the gas passes through the large-aperture end of the sieve holes 22, the internal volume of the sieve holes 22 is increased, the gas flows through the large-aperture end of the sieve holes 22, so that the gas needs more gas flow when flowing through the large-aperture end of the sieve holes 22, the flow rate of the gas is reduced, the contact reaction time of the gas and the stock solution on the tower plate 2 is increased after the flow rate of the gas is reduced, the stock solution and the gas are fully contacted, the rectification efficiency of the stock solution is increased, the working efficiency of the plate type rectification tower is increased, the gas is prevented from flowing too fast after passing through the sieve holes 22, the contact reaction time of the gas and the stock solution is insufficient, the rectification efficiency of the stock solution is reduced, and the working efficiency of the plate type rectification tower is affected.
Preferably, annular grooves 35 are formed in the scraper 32 corresponding to the positions of the sieve holes 22, a sleeve 36 is sleeved at the positions of the annular grooves 35, a group of first rods 4 are uniformly and circumferentially fixedly connected to the outer surface of the sleeve 36, and the diameters of the first rods 4 are smaller than the diameters of the sieve holes 22 with small diameters.
When in use, the rotating rod 3 drives the telescopic rod 31 to move, and the telescopic rod 31 drives the scraping plate 32 to move; when the scraping plate 32 moves to the inner wall of the tower body 1, the scraping plate 32 is extruded by the inner wall of the tower body 1, and the scraping plate 32 drives the telescopic rod 31 to retract towards the rotating rod 3; when the scraping plate 32 moves to contact the tray 2, the scraping plate 32 is not limited by the extrusion force, and the telescopic rod 31 stretches to drive the scraping plate 32 to be attached to the arc-shaped inner surface of the tray 2; the tray 2 moves to drive the sleeve 36 to move, and the sleeve 36 drives the first rod 4 to move; when the first rod 4 moves to the position of the sieve mesh 22, one end of the first rod 4, which is far away from the sleeve 36, passes through the small-bore end of the sieve mesh 22, so that the first rod 4 dredges the sieve mesh 22, impurities in the sieve mesh 22 are extruded out of the sieve mesh 22, the cleaning degree of the sieve mesh 22 is increased, the gas flow efficiency is increased, the rectification efficiency of the stock solution is further increased, impurities in the stock solution are prevented from entering the sieve mesh 22, and the sieve mesh 22 is blocked, so that the gas flow efficiency is influenced.
Preferably, the end of the rod number 4 far from the sleeve 36 is provided with rollers 41, and the surfaces of the rollers 41 are smooth.
When the novel scraper blade is used, the roller 41 is arranged at one end, far away from the sleeve 36, of the first rod 4, when the scraper blade 32 moves beyond the position of the sieve holes 22, the scraper blade 32 drives the sleeve 36 to move, the sleeve 36 drives the first rod 4 to move, the first rod 4 is limited by the sieve holes 22 to stop moving, the sleeve 36 rotates on the scraper blade 32, the sleeve 36 drives the second rod 4 to move, the second rod 4 drives the roller 41 to move to contact the arc-shaped inner surface of the tray 2, the roller 41 rolls on the arc-shaped inner surface of the tray 2, sliding friction between the first rod 4 and the arc-shaped inner surface of the tray 2 is converted into rolling friction, loss caused by friction between parts is reduced, parts are protected, the service life between the parts is prolonged, and production cost is reduced.
Preferably, a spiral groove 42 is formed at one end of the telescopic rod 31 far away from the sleeve 36, an inverted conical collar 43 is sleeved at the position of the telescopic rod 31 located in the spiral groove 42, the collar 43 is slidably connected with the telescopic rod 31, and a group of balls 44 are arranged between the inner wall of the collar 43 and the spiral groove 42; a fixing ring 45 is fixedly connected to the telescopic rod 31 at a position close to the collar 43, and the fixing ring 45 is connected with the collar 43 through a return spring.
When the first rod 4 moves to the position of the sieve hole 22, the first rod 4 enters the sieve hole 22 under the influence of gravity, the inner wall of the sieve hole 22 contacts the outer surface of the lantern ring 43, the inner wall of the sieve hole 22 extrudes the lantern ring 43 along with the gradual extension of the first rod 4 into the sieve hole 22, the lantern ring 43 is extruded to move spirally along the spiral groove 42 towards the direction close to the fixed ring 45 through the ball 44, so that the outer surface of the lantern ring 43 rubs against the inner wall of the sieve hole 22, impurities on the inner wall of the sieve hole 22 are removed by friction, the cleaning degree of the inner wall of the sieve hole 22 is increased, and the accumulation of impurities on the inner wall of the sieve hole 22 is prevented; when the first rod 4 moves to be vertical to the sieve holes 22, the inner walls of the sieve holes 22 are attached to the outer surfaces of the lantern rings 43; when the first rod 4 moves across the sieve holes 22, the extrusion force of the collar 43 on the inner wall of the sieve holes 22 is reduced, the reset spring drives the collar 43 to reset, the collar 43 rubs against the inner wall of another part of the sieve holes 22 in the resetting process, impurities on the inner wall of another part of the sieve holes 22 are rubbed and removed, the cleaning degree of the inner wall of the sieve holes 22 is further increased, and therefore the gas flow efficiency is increased, and the rectification efficiency is further increased.
Preferably, the outer surface of the collar 43 is fixedly connected with the blade 46, and the inclination direction of the blade 46 is the same as the inclination direction of the outer surface of the collar 43.
When the novel sieve mesh 22 is used, the blades 46 are arranged on the surface of the sleeve ring 43, when the first rod 4 moves to the position of the sieve mesh 22, the first rod 4 enters the sieve mesh 22 under the influence of gravity, the inner wall of the sieve mesh 22 contacts the outer surface of the sleeve ring 43, the inner wall of the sieve mesh 22 gradually stretches into the sieve mesh 22 along with the first rod 4 to extrude the sleeve ring 43 through the blades 46, the sleeve ring 43 is extruded to move spirally along the spiral groove 42 towards the direction close to the fixed ring 45 through the balls 44, the movement of the sleeve ring 43 drives the blades 46 to move, one end of the blades 46 far away from the sleeve ring 43 scrapes the inner wall of the sieve mesh 22, the blades 46 scrape impurities on the inner wall of the sieve mesh 22, and the cleaning degree of the inner wall of the sieve mesh 22 is increased, so that the cleaning degree of the sieve mesh 22 is increased, and the gas flow efficiency is increased; when the first rod 4 moves to be perpendicular to the sieve holes 22, one end of the blade 46, which is far away from the sleeve ring 43, is attached to the inner wall of the sieve holes 22, and a gap is formed between the sleeve ring 43 and the inner wall of the sieve holes 22, so that gas can still pass through when the first rod 4 cleans the sieve holes 22, thereby increasing the gas flow efficiency and further increasing the rectification efficiency; when the first rod 4 moves across the sieve holes 22, the extrusion force of the blades 46 on the inner walls of the sieve holes 22 is reduced, and the extrusion force of the sleeve ring 43 on the blades 46 is reduced, so that the sleeve ring 43 is driven by the return spring to return, and the sleeve ring 43 drives the blades 46 to scrape the inner walls of the other part of the sieve holes 22 in the return process, so that the cleaning degree of the inner walls of the sieve holes 22 is further increased.
The specific working procedure is as follows:
when the raw liquid is subjected to rectification treatment of 2, 4-dichlorophenol, the raw liquid is added into a plate type rectification tower through a liquid inlet pipe 14, gas is conveyed into the tower body 1 through an air inlet pipe 16 on the tower body 1, a motor 13 and a reboiler 12 are started, the raw liquid enters the tower body 1 and flows through a tower plate 2, the tower plate 2 is arranged in a bow-shaped staggered manner, so that the raw liquid flows to the bottom of the tower, the gas enters the tower body 1 to move to the top of the tower, the gas is bubbled out of the raw liquid on the tower plate 2 through a sieve hole 22 on the tower plate 2, the gas reacts with the raw liquid after bubbling to form 2, 4-dichlorophenol, the gas carries 2, 4-dichlorophenol steam to move to the top of the tower until contacting a condenser 15, the condenser 15 liquefies the 2, 4-dichlorophenol steam into 2, 4-dichlorophenol liquid, the heat exchanger 11 discharges the treated 2, 4-dichlorophenol liquid, the heat exchanger 11 is collected by workers, and the treated solution is discharged into the tower body 1 again; the motor 13 drives the worm 33 to move, the worm 33 drives the rotating rod 3 to move, the rotating rod 3 drives the telescopic rod 31 to move, and the telescopic rod 31 drives the scraping plate 32 to move; when the scraping plate 32 moves to contact the tray 2, the scraping plate 32 is not limited by the extrusion force, the telescopic rod 31 stretches to drive the scraping plate 32 to be attached to the arc-shaped inner surface of the tray 2, the scraping plate 32 scrapes the bottom of the tray 2, impurities deposited on the surface of the tray 2 in the stock solution are scraped, and the impurities flow down along with the stock solution from the position of the liquid-reducing plate 21; when the gas is bubbled out through the sieve holes 22, the gas enters from the end with small aperture in the sieve holes 22 and flows towards the top of the tower along the inner wall of the sieve holes 22, and the flow rate of the gas flowing through the end with large aperture in the sieve holes 22 is increased, so that the gas needs more gas flow rate when flowing through the end with large aperture in the sieve holes 22, the flow rate of the gas flowing through the sieve holes 22 is reduced, the contact reaction time between the gas and the stock solution on the tower plate 2 is increased after the flow rate of the gas is reduced, and the stock solution on the tower plate 2 is fully contacted with the gas; the tray 2 moves to drive the sleeve 36 to move, and the sleeve 36 drives the first rod 4 to move; when the first rod 4 moves to the position of the sieve holes 22, one end of the first rod 4 far away from the sleeve 36 passes through one end of the sieve holes 22 with small aperture, so that the first rod 4 dredges the sieve holes 22 and extrudes impurities in the sieve holes 22 into the sieve holes 22; when the scraper 32 moves across the position of the sieve holes 22, the scraper 32 drives the sleeve 36 to move, the sleeve 36 drives the first rod 4 to move, the first rod 4 stops moving under the limiting action of the sieve holes 22, the sleeve 36 rotates on the scraper 32, the sleeve 36 drives the second rod 4 to move, the second rod 4 drives the roller 41 to move to contact the arc-shaped inner surface of the tower plate 2, the roller 41 rolls on the arc-shaped inner surface of the tower plate 2, so that sliding friction between the first rod 4 and the arc-shaped inner surface of the tower plate 2 is converted into rolling friction, and loss generated by friction between parts is reduced; as the first rod 4 gradually stretches into the sieve holes 22, the inner wall of the sieve holes 22 extrudes the collar 43, and the collar 43 is extruded by the balls 44 to move along the spiral groove 42 towards the direction close to the fixed ring 45, so that the outer surface of the collar 43 rubs against the inner wall of the sieve holes 22 to remove impurities on the inner wall of the sieve holes 22; when the first rod 4 moves to the position of the sieve mesh 22, the first rod 4 enters the sieve mesh 22 under the influence of gravity, the inner wall of the sieve mesh 22 contacts the outer surface of the lantern ring 43, as the first rod 4 gradually stretches into the sieve mesh 22, the inner wall of the sieve mesh 22 extrudes the lantern ring 43 through the blades 46, the lantern ring 43 is extruded to move spirally along the spiral groove 42 towards the direction close to the fixed ring 45 through the balls 44, the movement of the lantern ring 43 drives the blades 46 to move, one end of the blades 46 away from the lantern ring 43 scrapes the inner wall of the sieve mesh 22, the blades 46 scrape impurities on the inner wall of the sieve mesh 22, and the cleaning degree of the inner wall of the sieve mesh 22 is increased, so that the cleaning degree of the sieve mesh 22 is increased, and the gas flow efficiency is increased.
The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A rectifying column for 2, 4-dichlorophenol production is characterized in that: comprises a tower body (1), a heat exchanger (11), a reboiler (12), a motor (13), a liquid inlet pipe (14) and a condenser (15); the top of the tower body (1) is fixedly connected with a condenser (15), the position, close to the condenser (15), of the outer surface of the tower body (1) is fixedly connected with a heat exchanger, the position, corresponding to the lower part of the heat exchanger, of the outer surface of the tower body (1) is fixedly connected with a reboiler (12), the position, far away from the heat exchanger, of the outer surface of the tower body (1) is fixedly connected with a liquid inlet pipe (14), and the position, close to the bottom of the tower body (1), of the outer surface of the tower body (1) is fixedly connected with an air inlet pipe (16); a group of tower plates (2) are uniformly and fixedly connected in the tower body (1), the tower plates (2) are arc-shaped, the tower plates (2) are arranged in a staggered mode, and when the tower is in operation, liquid flows down in an arch-shaped manner through the tower plates (2); the liquid-dropping position in the column plate (2) is fixedly connected with a liquid-dropping plate (21), the liquid-dropping plate (21) is vertically downward, and a group of sieve holes (22) are uniformly formed in the column plate (2); a rotating rod (3) is rotatably connected to the inner wall of the tower body (1) corresponding to the upper position of each tower plate (2), and the axial position of the rotating rod (3) is fixedly arranged; one end of the rotating rod (3) positioned in the tower body (1) is fixedly connected with a telescopic rod (31), and one end of the telescopic rod (31) away from the rotating rod (3) is fixedly connected with an arc scraping plate (32); a motor (13) is fixedly connected below the rotating rod (3) corresponding to the outer surface of the tower body (1), and a worm (33) is fixedly connected to the output end of the motor (13), wherein the worm (33) is in contact with the rotating rod (3); the positions of the rotating rods (3) contacting with the worm (33) are fixedly connected with gears (34), and threads of the corresponding gears (34) in the worm (33) are staggered;
the sieve holes (22) are all in reverse taper arrangement, the pore diameter of the sieve holes (22) far away from the bottom of the tower body (1) is large, and the pore diameter of the sieve holes (22) close to the bottom of the tower body (1) is small;
annular grooves (35) are formed in positions, corresponding to the sieve holes (22), of the scraping plates (32), sleeves (36) are sleeved at the positions, corresponding to the annular grooves (35), of the scraping plates (32), a group of first rods (4) are fixedly connected to the outer surface of each sleeve (36) uniformly in the circumference, and the diameters of the first rods (4) are smaller than the diameters of the small holes in the sieve holes (22).
2. The rectifying column for producing 2, 4-dichlorophenol according to claim 1, wherein: the end of the first rod (4) far away from the sleeve (36) is provided with rollers (41), and the surfaces of the rollers (41) are smooth.
3. The rectifying column for producing 2, 4-dichlorophenol according to claim 2, wherein: a spiral groove (42) is formed in one end, far away from the sleeve (36), of the telescopic rod (31), an inverted conical lantern ring (43) is sleeved at the position, located in the spiral groove (42), of the telescopic rod (31), the lantern ring (43) is in sliding connection with the telescopic rod (31), and a group of balls (44) are arranged between the inner wall of the lantern ring (43) and the spiral groove (42); a fixed ring (45) is fixedly connected to the telescopic rod (31) at a position close to the lantern ring (43), and the fixed ring (45) is connected with the lantern ring (43) through a reset spring.
4. A rectifying column for producing 2, 4-dichlorophenol according to claim 3, characterized in that: the outer surface of the lantern ring (43) is fixedly connected with a blade (46), and the inclination direction of the blade (46) is the same as that of the outer surface of the lantern ring (43).
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Effective date of registration: 20231206 Address after: No. 19 Rongye Road, Nanbao Economic Development Zone, Tangshan City, Hebei Province, 063000 Applicant after: Tangshan Shenghong Chemical Co.,Ltd. Address before: 221000 Room 102, building 4, Hanqiao community, intersection of Jiahan road and Zhongjing Third Road, Jiawang District, Xuzhou City, Jiangsu Province Applicant before: Lv Fakui |
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Denomination of invention: A distillation tower for the production of 2,4-dichlorophenol Granted publication date: 20240105 Pledgee: Bank of Cangzhou Limited by Share Ltd. Fengnan branch Pledgor: Tangshan Shenghong Chemical Co.,Ltd. Registration number: Y2024980027897 |