CN215876336U

CN215876336U - Octanol recovery unit for dioctyl terephthalate

Info

Publication number: CN215876336U
Application number: CN202220127710.0U
Authority: CN
Inventors: 颜建鹏; 颜克鲁; 郭晓
Original assignee: Shandong Tongyuan Environmental Material Co ltd
Current assignee: Shandong Tongyuan Environmental Material Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-02-22
Anticipated expiration: 2032-01-18

Abstract

The utility model relates to the technical field of chemical equipment, in particular to an octanol recovery device for dioctyl terephthalate, which comprises a recovery box, wherein a flow equalizing assembly is arranged in the recovery box, a cooling box is arranged above a top cover, a spiral coil is vertically arranged in the cooling box, and the top end of the spiral coil is outwards connected with an air outlet pipe, and the octanol recovery device has the advantages that: by utilizing the principle of alcohol-water stratification and arranging overflow plates with different structures, the alcohol-water stratification and the overflow plates are repeatedly separated; the flow equalizing assembly is additionally arranged to uniformly mix the alcohol and water in the layering chamber, so that the subsequent layering effect between the alcohol and water is further improved; a water circulation pipeline and a fan are added, and the separated water is used as cooling liquid for multiple times; can divide into upper and lower two-layer with the cooler bin, pass its lower floor with the recovery tube, utilize the heat to preheat the octanol in retrieving, improve the utilization ratio of heat energy.

Description

Octanol recovery unit for dioctyl terephthalate

Technical Field

The utility model relates to the technical field of chemical equipment, in particular to an octanol recovery device for dioctyl terephthalate.

Background

DOTP is known as dioctyl terephthalate, is nearly colorless low-viscosity liquid, adopts a direct esterification method in the production process, is easy to sublimate at high temperature due to the special physical and chemical properties of reaction raw material terephthalic acid, has a melting point of 425 ℃ and is insoluble in alcohol and esterified substances, has phase change in the reaction process, and has the kinetic characteristics different from general homogeneous liquid phase reaction.

Terephthalic acid esterification reaction terephthalic acid is heated in the presence of a catalyst to carry out esterification reaction in two steps, wherein in the first step, the terephthalic acid reacts with octanol to generate monoester; in the second step, the monoester reacts with octanol to form a gas mixture of water and excess octanol.

After water and excessive octanol are evaporated, if the water and the excessive octanol are directly discharged externally, the octanol can be wasted; if the alcohol and water are separated without condensation and directly flow back to the reaction kettle, the speed of the esterification reversible reaction process is slowed. The boiling point of octanol is 184 ℃, the octanol is insoluble in water, how to efficiently separate alcohol from water and fully recycle obtained resources are the problems which are allowed to be solved in the process of octanol recovery.

SUMMERY OF THE UTILITY MODEL

The utility model provides an octanol recovery unit for dioctyl terephthalate, which has the following specific implementation modes:

the utility model provides a dioctyl phthalate is octanol recovery unit for dioctyl terephthalate, including the collection box, the cooler bin, the hydrologic cycle pipeline, the subassembly flow equalizes, the intake pipe, the outlet duct, the fan, a controller, top cap and back flow, the collection box embeds the subassembly flow equalizes, its top level is equipped with the detachable top cap, the cooler bin has been put to the top cap top, the vertical spiral coil that is equipped with in the cooler bin, and spiral coil's top is the outer air outlet pipe that is connected with, its bottom crosses with the intake pipe of horizontal setting and the vertical back flow of locating in the collection box respectively and switches on, the coolant liquid of cooler bin advances, the hydrologic cycle pipeline that the play end set up through the outside links to each other with the collection box bottom.

The recycling bin is of an upward opening-shaped structure and is divided into an upper layer and a lower layer through a transverse plate, the lower layer is a water storage chamber, and the upper layer is divided into a layering chamber, an octanol recycling chamber and a water recycling chamber through a partition plate, a first overflow plate and a second overflow plate.

Further, the water recovery room is vertical to be switched on with the reservoir chamber, and octanol recovery room lateral wall top embeds there is first level sensor, and its bottom is outwards equipped with the recovery tube of the built-in first solenoid valve, and the layering room top is equipped with the inlet tube, and fan and guide duct have been put respectively to the top side of reservoir chamber, and second level sensor arranges the fan below of reservoir chamber lateral wall in, and the diaphragm bottom between layering room and the reservoir chamber is vertical to be equipped with the liquid suction pipe of built-in second solenoid valve.

Further, the second overflow plate comprises a first vertical plate and a second vertical plate which are vertically arranged, the first vertical plate is arranged on one side of the layering chamber, a certain gap exists between the bottom of the first vertical plate and the horizontal plate, the top of the first vertical plate is connected with the top cover, the bottom of the second vertical plate is connected with the horizontal plate, a certain gap exists between the top of the second vertical plate and the top cover, and a stepped overflow channel is formed between the first vertical plate and the second vertical plate.

Furthermore, the bottom of the first overflow plate is connected with the transverse plate, a certain gap is reserved between the top of the first overflow plate and the top cover, and a plurality of dielectric constant sensors are horizontally distributed on the top of the layering chamber of the first overflow plate.

The subassembly that flow equalizes includes vertical first sleeve and the second sleeve of locating layering room bottom, and the second sleeve outside is located to first sleeve cover, and both whole bodies level respectively are equipped with a plurality of first conduction openings and second conduction opening to first conduction opening is the example, and the vertical equidistance of a plurality of first conduction openings is laid all around the body in second sleeve, and the bottom height that the first conduction opening of extreme lower position highly is greater than first riser.

Further, first conduction mouth bottom all sets up to outer chamfer structure, and second conduction mouth bottom all sets up to interior chamfer structure, and first conduction mouth and second conduction mouth are vertical dislocation in proper order and are laid on the whole.

The water circulation pipeline comprises a liquid inlet pipe and a liquid return pipe, wherein the liquid inlet pipe and the liquid return pipe are respectively sleeved with the first water pump and the second water pump, one end of the liquid inlet pipe is communicated with the bottom of the cooling box, the other end of the liquid inlet pipe is connected to the bottom of the water storage chamber, one end of the liquid return pipe is communicated with the top of the cooling box, and the other end of the liquid return pipe is connected to the side wall of the water recovery chamber.

The input end of the controller is respectively and electrically connected with the first liquid level sensor, the second liquid level sensor and the dielectric constant sensor, and the output end of the controller is respectively and electrically connected with the first water pump, the second water pump, the first electromagnetic valve, the second electromagnetic valve and the fan.

Due to the adoption of the technical scheme, the utility model has the beneficial technical effects that:

1. according to the utility model, the alcohol-water separation principle is utilized and overflow plates with different structures are arranged, so that the alcohol-water separation principle and the overflow plates are repeatedly separated;

2. the flow equalizing assembly is additionally arranged, so that the alcohol and water in the layering chamber are uniformly mixed, and the subsequent layering effect between the alcohol and water is further improved;

3. the utility model is additionally provided with a water circulation pipeline and a fan, and the separated water is used as cooling liquid for multiple times;

4. the utility model has simple structure, can divide the cooling box into an upper layer and a lower layer, passes the recovery pipe through the lower layer, and preheats octanol in the recovery by using heat, thereby improving the utilization rate of heat energy.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of a structure of the present invention;

FIG. 3 is a schematic view of the recycling bin of the present invention;

FIG. 4 is a first cross-sectional view of the recycling bin of the present invention;

FIG. 5 is a sectional view of the recycling bin of the present invention;

FIG. 6 is a cross-sectional view of a front view of the present invention;

FIG. 7 is a cross-sectional view of the structure of the cooling box of the present invention;

FIG. 8 is a cross-sectional view of a flow straightener assembly of the present invention;

fig. 9 is a schematic diagram of the electrical structure of the present invention.

Description of reference numerals:

1. a recycling tank, 2, a cooling tank, 3, a water circulation pipeline, 4, a flow equalizing assembly, 5, an air inlet pipe, 6, an air outlet pipe, 7, a fan, 8, a controller, 9, a top cover, 10 and a return pipe,

11. a transverse plate, 12, a baffle plate, 13, a first overflow plate, 14, a second overflow plate, 15, a liquid pumping pipe, 16, a dielectric constant sensor, 17, an air guide pipe, 18, a water inlet pipe, 19 and a recovery pipe,

1A, a layering chamber, 1B, an octanol recovery chamber, 1C, a water recovery chamber, 1D, a water storage chamber,

141. a first vertical plate 142, a second vertical plate 143 and an overflow channel,

21. a spiral coil pipe is arranged on the upper portion of the shell,

31. a liquid inlet pipe 32, a liquid return pipe 33, a first water pump 34, a second water pump,

41. a first sleeve 42, a second sleeve 43, a first conduction port 44, a second conduction port,

43A, an outer chamfer, 44A, an inner chamfer,

81. a first liquid level sensor 82, a second liquid level sensor 83, a first solenoid valve 84, a second solenoid valve.

Detailed Description

The following description of the embodiments of the present invention refers to the accompanying drawings and examples:

it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and any modifications of the structures, changes in the proportions and adjustments of the sizes, without affecting the efficacy and attainment of the same, are intended to fall within the scope of the present disclosure.

In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Embodiment 1, combine fig. 1 and fig. 2, this embodiment provides an octanol recovery unit for dioctyl terephthalate, including collection box 1, cooler bin 2, intake pipe 5, outlet duct 6, controller 8, top cap 9 and back flow 10, collection box 1 top level is equipped with detachable top cap 9, cooler bin 2 has been put to top cap 9 top, vertically in the cooler bin 2 be equipped with helical coil 21, and helical coil 21's top is outwards connected with outlet duct 6, its bottom crosses with intake pipe 5 and the vertical back flow 10 of locating in collection box 1 that transversely sets up respectively and switches on, carry out condensation separation with mellow wine water through cooler bin 2, and the mellow wine that will retrieve flows back to reaction system and continues to participate in the reaction, promote the octanol utilization ratio.

Combine fig. 5, collection box 1 is upwards opening column structure, it divide into through diaphragm 11, two-layer down, the lower floor is reservoir chamber 1D, baffle 12 is passed through on the upper strata, first overflow plate 13 and second overflow plate 14 divide into layering room 1A, octanol recovery room 1B and water recovery room 1C, water recovery room 1C and the vertical switch-on of reservoir chamber 1D in this structure, octanol recovery room 1B lateral wall top embeds there is first level sensor 81, its bottom outwards is equipped with the recovery tube 19 of the built-in first solenoid valve 83, layering room 1A top is equipped with inlet tube 18, fan 7 and guide duct 17 have been put respectively to the top side of reservoir chamber 1D, and second level sensor 82 arranges the fan 7 below of reservoir chamber 1D lateral wall in, the vertical liquid suction pipe 15 that is equipped with built-in second solenoid valve 84 in diaphragm 11 bottom between layering room 1A and the reservoir chamber 1D.

With reference to fig. 6, the second overflow plate 14 includes a first vertical plate 141 and a second vertical plate 142 that are vertically disposed, and the first vertical plate 141 is disposed on one side of the layering chamber 1A, a certain gap exists between the bottom of the first vertical plate 141 and the horizontal plate 11, the top of the first vertical plate 141 is connected to the top cover 9, the bottom of the second vertical plate 142 is connected to the horizontal plate 11, a certain gap exists between the top of the second vertical plate 142 and the top cover 9, and a stepped overflow channel 143 is formed between the first vertical plate 141 and the second vertical plate 142, in this structure, water at the bottom of the layering chamber 1A passes through the overflow channel 143 and the top of the second vertical plate 142 and enters the water recovery chamber 1C in an overflow manner, and octanol is more effectively isolated from entering.

First overflow plate 13 bottom meets with diaphragm 11, and there is a certain clearance at its top and top cap 9, and a plurality of dielectric constant sensors 16 have been laid to the layering room 1A side top level of first overflow plate 13, and the local octanol in layering room 1A top gets into octanol recovery room 1B through first overflow plate 13 ground top with overflow local mode in this structure, and dielectric constant sensor 16 can prevent that the water content in layering room 1A is too much, avoids water entering octanol recovery room 1B.

Embodiment 2 combines fig. 2, and this embodiment still provides an octanol recovery unit for dioctyl terephthalate, still includes the subassembly 4 that flow equalizes of placing in the collection box 1 in, and after outwards through the manifold action of subassembly 4 that flow equalizes when octanol and water, both fully flow to realize better layering, further promoted the rate of recovery of octanol.

With reference to fig. 8, the flow equalizing assembly 4 includes a first sleeve 41 and a second sleeve 42 vertically disposed at the bottom of the layering chamber 1A, the first sleeve 41 is sleeved outside the second sleeve 42, the first sleeve 41 and the second sleeve are horizontally disposed with a plurality of first conduction openings 43 and second conduction openings 44 around, taking the first conduction openings 43 as an example, the first conduction openings 43 are vertically disposed at equal intervals around the second sleeve 42, and the bottom height of the lowest first conduction opening 43 is greater than the bottom height of the first vertical plate 141, in this structure, the bottom of the first conduction opening 43 is disposed as an outer chamfer 43A structure, the bottom of the second conduction opening 44 is disposed as an inner chamfer 44A structure, the first conduction opening 43 and the second conduction opening 44 are sequentially vertically disposed in a staggered manner, the first conduction opening 43 and the second conduction opening 44 alternately form a V-shaped structure, so that the fluctuation of the liquid is more obvious, and the octanol just falling into the bottom of the layering chamber 1A is in the process, the upper liquid layer of the separation chamber 1A can be more easily reached by the wave motion.

Embodiment 3, with reference to fig. 2, this embodiment further provides an octanol recovery unit for dioctyl terephthalate, further including a water circulation pipeline 3 and a fan 7, where the water circulation pipeline 3 connects the bottom of the recovery tank 1 with the inlet and outlet ends of the cooling liquid of the cooling tank 2, and the separated water and the water introduced by the water inlet pipe 18 are used together as the cooling liquid, so as to improve the utilization rate of the water.

Referring to fig. 7, the water circulation pipeline 3 includes a liquid inlet pipe 31 and a liquid return pipe 32 respectively sleeved with a first water pump 33 and a second water pump 34, one end of the liquid inlet pipe 31 is connected to the bottom of the cooling tank 2, the other end thereof is connected to the bottom of the water storage chamber 1D, one end of the liquid return pipe 32 is connected to the top of the cooling tank 2, and the other end thereof is connected to the side wall of the water recovery chamber 1C.

With reference to fig. 3, the fan 7 and the air duct 17 are respectively arranged on the top side of the water storage chamber 1D, and the second liquid level sensor 82 is arranged below the fan 7 on the side wall of the water storage chamber 1D, in the structure, the second liquid level sensor 82 is used for prompting that the water quantity in the water storage chamber 1D is too much, and a drainage pipeline of the water storage chamber 1D is opened below the water storage chamber 1D to discharge water outwards; the cooling water flows back to the water storage chamber 1D, and the fan 7 and the air guide pipe 17 are used for cooling the water in the water storage chamber 1D.

Referring to fig. 9, the input end of the controller 8 is electrically connected to the first liquid level sensor 81, the second liquid level sensor 82 and the dielectric constant sensor 16, the output end of the controller is electrically connected to the first water pump 33, the second water pump 34, the first solenoid valve 83, the second solenoid valve 84 and the fan 7, and the first liquid level sensor 81 and the second liquid level sensor 82 are respectively used for detecting the liquid height in the octanol recovery chamber 1B and the water storage chamber 1D.

The working principle is as follows: the second electromagnetic valve 84 is opened, and the cooling water firstly enters the layering chamber 1A and the water storage chamber 1D from the water inlet pipe 18 and the liquid extraction pipe 15 respectively; then the second electromagnetic valve 84 is closed, at this time, the water storage chamber 1D contains a certain amount of cooling water, and the height of the water in the layering chamber 1A is higher than the bottom of the first vertical plate 141, so that the alcohol-water mixed liquid which just enters is prevented from being directly mixed into one side of the overflow channel 143; the first water pump 33 and the second water pump 34 are turned on, and the cooling water in the water storage chamber 1D circulates through the cooling tank 2.

Alcohol-water high-temperature gas is introduced from the gas inlet pipe 5, is changed into liquid under the condensation action after passing through the spiral coil 21 in the cooling box 2, vertically falls into the layering chamber 1A through the return pipe 10, and is separated from octanol under the full adjustment of the flow equalizing assembly 4, wherein the upper layer liquid of the layering chamber 1A is alcohol, and the lower layer liquid is water; when the liquid is increased step by step, water enters the water storage chamber 1D through the overflow channel 143, and octanol enters the octanol recovery chamber 1B.

When the water content in the layering chamber 1A is excessive, the dielectric constant sensor 16 is triggered, the controller 8 controls the second electromagnetic valve 84 to open, and a part of water at the bottom of the layering chamber 1A is discharged downwards, but the lowest liquid level needs to be kept above the height of the bottom of the first vertical plate 141.

Embodiment 4, with reference to fig. 2, this embodiment further provides an octanol recovery unit for dioctyl terephthalate, wherein a set of cooling water inlet and outlet pipes can be additionally disposed on the side of the water storage chamber 1D, when the water in the water storage chamber 1D is no longer suitable for cooling, the water can be discharged to the outside, and meanwhile, the subsequent cooling water can also directly enter the water storage chamber 1D without passing through the layering chamber 1A, so as to avoid multiple shutdown operations for discharging the liquid in the layering chamber 1A.

At this time, the water storage chamber 1D can be supplied with cooling water independently, and the water separated from the alcohol water can be used for cooling; and when the water content in the alcohol water in the layering chamber 1A is excessive, the water can be discharged into the water storage chamber 1D through the liquid pumping pipe 15.

Embodiment 5, with reference to fig. 2 and 4, this embodiment further provides an octanol recovery device for dioctyl terephthalate, in which the cooling tank 2 can be layered up and down, the water circulation pipeline 3 continues to flow through the upper layer of the cooling tank 2, and the recovery pipe 19 horizontally passes through the lower layer of the cooling tank 2 and then is connected to the reaction kettle. Because the bottom temperature of spiral coil 21 is the highest in cooling box 2, after first solenoid valve 83 opened, octanol can preheat in advance through the contact with spiral coil 21 bottom, has further promoted heat utilization efficiency.

Many other changes and modifications can be made without departing from the spirit and scope of the utility model. It is to be understood that the utility model is not to be limited to the specific embodiments, but only by the scope of the appended claims.

Claims

1. An octanol recovery unit for dioctyl terephthalate comprises a recovery tank (1), a cooling tank (2), a water circulation pipeline (3), a flow equalizing assembly (4), an air inlet pipe (5), an air outlet pipe (6), a fan (7), a controller (8), a top cover (9) and a return pipe (10),

the recycling bin (1) is internally provided with a flow equalizing assembly (4), the top level of the recycling bin is provided with a detachable top cover (9), a cooling bin (2) is arranged above the top cover (9), a spiral coil (21) is vertically arranged in the cooling bin (2), the top end of the spiral coil (21) is outwards connected with an air outlet pipe (6), the bottom end of the spiral coil is crossed and communicated with an air inlet pipe (5) transversely arranged and a return pipe (10) vertically arranged in the recycling bin (1), cooling liquid of the cooling bin (2) enters, and the outlet end of the cooling tank is connected with the bottom of the recycling bin (1) through a water circulation pipeline (3) arranged on the outer side.

2. The octanol recovery device for dioctyl terephthalate according to claim 1, wherein said recovery tank (1) is an upward opening structure, which is divided into upper and lower layers by a transverse plate (11), the lower layer is a water storage chamber (1D), and the upper layer is divided into a layering chamber (1A), an octanol recovery chamber (1B) and a water recovery chamber (1C) by a partition plate (12), a first overflow plate (13) and a second overflow plate (14).

3. The octanol recovery device for dioctyl terephthalate according to claim 2, wherein said water recovery chamber (1C) is vertically connected to said water storage chamber (1D), a first liquid level sensor (81) is disposed in the top of the sidewall of said octanol recovery chamber (1B), a recovery pipe (19) having a first electromagnetic valve (83) is disposed in the bottom thereof,

the improved water level sensor is characterized in that a water inlet pipe (18) is arranged above the layering chamber (1A), a fan (7) and an air guide pipe (17) are respectively arranged on the side edge of the top of the water storage chamber (1D), a second liquid level sensor (82) is arranged below the fan (7) on the side wall of the water storage chamber (1D), and a liquid pumping pipe (15) with a built-in second electromagnetic valve (84) is vertically arranged at the bottom of a transverse plate (11) between the layering chamber (1A) and the water storage chamber (1D).

4. The octanol recovery device according to claim 3, wherein the second overflow plate (14) comprises a first vertical plate (141) and a second vertical plate (142) which are vertically arranged, the first vertical plate (141) is arranged on one side of the layering chamber (1A), the bottom of the first vertical plate (141) has a certain gap with the horizontal plate (11), the top of the first vertical plate is connected with the top cover (9), the bottom of the second vertical plate (142) is connected with the horizontal plate (11), the top of the second vertical plate is connected with the top cover (9), and a stepped overflow channel (143) is formed between the first vertical plate (141) and the second vertical plate (142).

5. The octanol recovery device according to claim 4, wherein the bottom of the first overflow plate (13) is connected to the transverse plate (11), the top of the first overflow plate is spaced from the top cover (9), and a plurality of dielectric constant sensors (16) are horizontally arranged on the top of the layering chamber (1A) side of the first overflow plate (13).

6. The octanol recovery unit for dioctyl terephthalate according to claim 5, wherein the flow equalizing assembly (4) comprises a first sleeve (41) and a second sleeve (42) vertically disposed at the bottom of the layering chamber (1A), the first sleeve (41) is sleeved outside the second sleeve (42), the first and second sleeves are horizontally provided with a plurality of first conduction openings (43) and second conduction openings (44) respectively, for example, the first conduction opening (43), the first conduction openings (43) are vertically and equidistantly disposed around the second sleeve (42), and the bottom height of the first conduction opening (43) at the lowest position is greater than the bottom height of the first vertical plate (141).

7. The octanol recovery device for dioctyl terephthalate according to claim 6, wherein the bottoms of the first conduction openings (43) are both configured to be an outer chamfer (43A) structure, the bottoms of the second conduction openings (44) are both configured to be an inner chamfer (44A) structure, and the first conduction openings (43) and the second conduction openings (44) are vertically arranged in sequence in a staggered manner as a whole.

8. The octanol recovery device according to claim 7, wherein said water circulation pipeline (3) comprises a liquid inlet pipe (31) and a liquid return pipe (32) respectively sleeved with a first water pump (33) and a second water pump (34), one end of said liquid inlet pipe (31) is connected to the bottom of said cooling tank (2), the other end is connected to the bottom of said water storage chamber (1D), one end of said liquid return pipe (32) is connected to the top of said cooling tank (2), the other end is connected to the side wall of said water recovery chamber (1C).

9. The octanol recovery device according to claim 8, wherein the input end of the controller (8) is electrically connected to the first liquid level sensor (81), the second liquid level sensor (82) and the dielectric constant sensor (16), and the output end of the controller is electrically connected to the first water pump (33), the second water pump (34), the first solenoid valve (83), the second solenoid valve (84) and the fan (7).