CN217511197U

CN217511197U - Rectifier unit of heat sensitivity chemical products

Info

Publication number: CN217511197U
Application number: CN202221387453.0U
Authority: CN
Inventors: 周小茗; 李伟良; 张容; 谭金龙; 黎宇程; 阮彬彬
Original assignee: Guangdong Zhonghe High Tech Co ltd
Current assignee: Guangdong Zhonghe High Tech Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-09-30
Anticipated expiration: 2032-06-01

Abstract

The utility model belongs to the technical field of chemical industry equipment, specifically disclose a rectifier unit of heat sensitivity chemical products, this rectifier unit of heat sensitivity chemical products includes rectifying column, reboiler, circulating pump, gas-liquid separation jar, liquid storage pot and condensing equipment, and the top of the tower of rectifying column is equipped with the second discharge gate, and the second discharge gate communicates through the gaseous phase entry of first pipeline with the gas-liquid separation jar, and condensing equipment is including setting up one-level condenser and the second grade condenser on first pipeline. The utility model discloses a material in the first pipeline can be carried out the second grade cooling to one-level condenser and second grade condenser for the gaseous phase material in the first pipeline can condense as early as possible and be the liquid phase, and the cooling effect is good, and then has reduced the top of the tower pressure of rectifying column, and the steady quality of distillate, the rectification is efficient, and the energy consumption is less.

Description

Rectifier unit of heat sensitivity chemical products

Technical Field

The utility model relates to a chemical industry equipment technical field especially relates to a rectifier unit of heat sensitivity chemical products.

Background

The rectifying tower is a tower-type gas-liquid contact device for rectifying products in chemical equipment, and light components (low-boiling-point substances) in a liquid phase are transferred to a gas phase and heavy components (high-boiling-point substances) in the gas phase are transferred to the liquid phase by utilizing the property that each component in a mixture has different volatility, namely the vapor pressure of each component is different at the same temperature, so that the aim of separating the light components (low-boiling-point substances) from the heavy components (high-boiling-point substances) is fulfilled.

However, some chemical products belong to thermosensitive materials, and during the pressure reduction rectification process, the evaporation capacity of the thermosensitive materials is large, and the thermosensitive materials cannot be cooled in time through a conventional rectification device, so that the gas phase quantity at the top of a rectification tower is large, the pressure at the top of the rectification tower is large, the quality of distillate of the thermosensitive materials is unstable, the rectification efficiency is affected, and the energy consumption is high.

Therefore, a rectification device for heat-sensitive chemical products is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rectifier unit of heat sensitivity chemical products is applicable to the disengaging process of heat sensitivity material, can in time cool off the heat sensitivity material of the gaseous phase that the top of the tower distilled off, avoids the material to cause the top of the tower pressure increase in the top of the tower gathering, and rectification efficiency is higher.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a rectifier unit of heat sensitivity chemical products, this rectifier unit of heat sensitivity chemical products includes:

the rectifying tower comprises a rectifying section and a stripping section, wherein a first feeding hole, a second feeding hole and a supplementary material inlet are formed in the wall of the rectifying tower, the supplementary material inlet is formed in the stripping section and used for supplementing materials into the rectifying tower, the first feeding hole is formed between the rectifying section and the stripping section, the second feeding hole is formed in the rectifying section, a first discharging hole and a second discharging hole are formed in the rectifying tower, the first discharging hole is formed in the bottom of the rectifying tower, and the second discharging hole is formed in the top of the rectifying tower;

a reboiler, wherein an outlet of the reboiler is communicated with the first feeding hole, and the reboiler is used for heating the material entering the rectifying tower;

the circulating pump is arranged between the rectifying tower and the reboiler, an inlet of the circulating pump is communicated with the first discharge hole, and an outlet of the circulating pump is communicated with an inlet of the reboiler;

the gas-liquid separation tank comprises a gas phase inlet and a liquid phase outlet, the gas phase inlet is communicated with the second discharge hole through a first pipeline, the liquid phase outlet is respectively communicated with the second feed port and the liquid storage tank, and the liquid storage tank is used for collecting liquid phase materials;

condensing equipment, condensing equipment includes one-level condenser and second grade condenser, the one-level condenser with the second grade condenser sets up on first pipeline, the one-level condenser with the second grade condenser is used for right gaseous material cools off in the first pipeline.

Optionally, the column diameter of the rectifying section is larger than the column diameter of the stripping section.

Optionally, the tower diameter of the rectifying section ranges from 1100mm to 1300mm, and the tower diameter of the stripping section ranges from 900mm to 1000 mm.

Optionally, the rectification apparatus for a heat-sensitive chemical product further comprises a vacuum pumping apparatus, the vacuum pumping apparatus is communicated with the gas-liquid separation tank, and the vacuum pumping apparatus is used for adjusting the vacuum degree inside the rectification tower.

Optionally, the pressure inside the rectification column is maintained between-0.0995 Mpa and-0.0990 Mpa.

Optionally, the vacuum pumping device is a vacuum pump, and the vacuum pump is communicated with the gas-liquid separation tank.

Optionally, the coolant used by the primary condenser is water.

Optionally, the coolant used by the secondary condenser is a refrigerant fluid.

Optionally, the liquid phase outlet is communicated with a second pipeline, the other end of the second pipeline is communicated with a third pipeline and a fourth pipeline at the same time, the third pipeline is communicated with the second feed inlet, and the fourth pipeline is communicated with the liquid storage tank.

The utility model has the advantages that:

the utility model provides a rectifier unit of heat sensitivity chemical products, this rectifier unit of heat sensitivity chemical products includes the rectifying column, the reboiler, the circulating pump, the knockout drum, liquid storage pot and condensing equipment, the top of the tower of rectifying column is equipped with the second discharge gate, the second discharge gate is through the gaseous phase entry intercommunication of first pipeline and knockout drum, condensing equipment is including setting up one-level condenser and the second grade condenser on first pipeline, can carry out the second grade cooling to the material in the first pipeline through one-level condenser and second grade condenser, make the gaseous phase material in the first pipeline can condense as early as possible to the liquid phase, the cooling effect is good, and then reduced the top of the tower pressure of rectifying column, the steady quality of distillate, rectification efficiency is high, and the energy consumption is less.

Drawings

FIG. 1 is a schematic view showing a conventional rectification apparatus for heat-sensitive chemical products;

fig. 2 is a schematic structural diagram of a rectification apparatus for heat-sensitive chemical products provided in an embodiment of the present invention.

In the figure:

100', a rectifying tower; 110', a rectifying section; 120', a stripping section; 200', a reboiler; 300', a circulation pump; 400' gas-liquid separation tank; 500', a liquid storage tank; 600' and a condensing unit;

100. a rectifying tower; 110. a rectifying section; 120. a stripping section; 101. a first feed port; 102. a second feed port; 103. a first discharge port; 104. a second discharge port; 200. a reboiler; 300. a circulation pump; 400. a gas-liquid separation tank; 410. a first pipeline; 420. a second pipeline; 430. a third pipeline; 440. a fourth pipeline; 500. a liquid storage tank; 600. a condensing unit; 610. a first-stage condenser 620 and a second-stage condenser.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

For some heat-sensitive chemical products, a rectifying tower 100 ' shown in fig. 1 is generally adopted to rectify the heat-sensitive chemical products, where the rectifying tower 100 ' includes a rectifying section 110 ' and a stripping section 120 ', and the diameter of the rectifying section 110 ' is smaller than that of the stripping section 120 ', because the evaporation capacity of the heat-sensitive chemical products in a reduced pressure state is relatively large, and only one condensing device 600 ' is arranged in the rectifying device, the gas-phase material cannot be condensed in time, the gas-phase material is accumulated on the top of the rectifying tower 100 ', the pressure on the top of the tower is increased, the vacuum degree in the tower is reduced, and the temperature of the distillate on the top of the tower is increased, so that a reboiler 200 ' needs more heat to heat the material in the tower, which increases the energy consumption, and at this time, the heat-sensitive chemical products for high-temperature rectification are easily decomposed, the quality of the products is unstable, the rectification efficiency is low, and the rectification effect is poor.

Therefore, the present embodiment provides a rectification apparatus for a heat-sensitive chemical product, and an operation mode of the rectification apparatus for a heat-sensitive chemical product is an intermittent operation. As shown in fig. 2, the rectifying apparatus for heat-sensitive chemical products includes a rectifying tower 100, a reboiler 200, a circulating pump 300, a gas-liquid separation tank 400, a liquid storage tank 500 and a condensing apparatus 600, wherein the rectifying tower 100 includes a rectifying section 110 and a stripping section 120, and a first feed inlet 101, a second feed inlet 102 and a supplementary material inlet (not shown in the figure) are provided on a tower wall of the rectifying tower 100, the supplementary material inlet is provided on the stripping section 120 and is used for supplementing materials into the rectifying tower 100, the materials in this embodiment are heat-sensitive chemical products, the first feed inlet 101 is provided between the rectifying section 110 and the stripping section 120, and the second feed inlet 102 is provided on the rectifying section 110.

Still be equipped with first discharge gate 103 and second discharge gate 104 on rectifying column 100, first discharge gate 103 sets up at the bottom of rectifying column 100, and the import intercommunication with circulating pump 300, what first discharge gate 103 sent out is the accumulated liquid phase material at the bottom of the tower, the export of circulating pump 300 and reboiler 200's import intercommunication, reboiler 200's export and first feed inlet 101 intercommunication, reboiler 200 can heat the material that gets into in rectifying column 100 through high temperature steam, circulating pump 300 sets up between rectifying column 100 and reboiler 200, can squeeze into rectifying column 100 inside through the material that reboiler 200 heated through circulating pump 300, thereby accomplish the circulation of material.

The second discharge port 104 is arranged at the top of the rectifying tower 100 and is communicated with the gas-liquid separation tank 400, and the gas-phase material distilled from the top of the rectifying tower is discharged from the second discharge port 104. Specifically, the gas-liquid separation tank 400 comprises a gas phase inlet and a liquid phase outlet, the gas phase inlet is arranged at the top of the gas-liquid separation tank 400, the liquid phase outlet is arranged at the bottom of the gas-liquid separation tank 400, the gas phase inlet is communicated with the second discharge hole 104 through a first pipeline 410, the liquid phase outlet is respectively communicated with the second feed port 102 and the liquid storage tank 500, and the liquid storage tank 500 is used for collecting liquid phase materials after rectification is completed. Further, a second pipeline 420 is communicated with a liquid phase outlet of the gas-liquid separation tank 400, the other end of the second pipeline 420 is simultaneously communicated with a third pipeline 430 and a fourth pipeline 440, the second pipeline 420, the third pipeline 430 and the fourth pipeline 440 jointly form a three-way pipeline, the third pipeline 430 is communicated with the second feed port 102, and the fourth pipeline 440 is communicated with the liquid storage tank 500.

The condensing unit 600 includes a first condenser 610 and a second condenser 620, and the first condenser 610 and the second condenser 620 are disposed on the first pipe 410 to cool the gas-phase material in the first pipe 410. Can carry out the second grade cooling to the material in the first pipeline 410 through one-level condenser 610 and second grade condenser 620, on the one hand, can provide sufficient cold source so that the gaseous phase material in the first pipeline 410 can condense as early as possible for the liquid phase, the separation effect is good, gaseous phase material gathering of having avoided the top of the tower 100 of rectifying column simultaneously causes the top of the tower pressure too high, consequently, the boiling point of material also reduces under the lower negative pressure, the temperature of top of the tower distillate reduces, the distillate is difficult for decomposing, the steady quality of product, the rectification is efficient. On the other hand, the temperature of the overhead distillate is reduced, so that the use amount of high-temperature steam for heating is reduced, and the energy consumption is lower.

In order to ensure the cooling effect of the condensing device 600, the coolant used by the first-stage condenser 610 in this embodiment is water, and the coolant used by the second-stage condenser 620 is a cooling liquid. The freezing liquid can be ethylene glycol aqueous solution, so that the gas phase material in the first pipeline 410 can be condensed in time, the separation effect is improved, and the rectification capacity is further improved.

As an optional scheme, the rectification apparatus for heat-sensitive chemical products further includes a vacuum pumping apparatus, the vacuum pumping apparatus is communicated with the gas-liquid separation tank 400, and the vacuum pumping apparatus is used for adjusting the vacuum degree inside the rectification tower 100. In some embodiments, the vacuum pumping device may be a vacuum pump, and the vacuum pump is in communication with the gas-liquid separation tank 400, so that the vacuum state in the rectification column 100 can be adjusted by the vacuum pump due to the communication between the gas-liquid separation tank 400 and the rectification column 100. Alternatively, the pressure inside the rectifying column 100 is maintained at-0.0995 MPa to-0.0990 MPa.

In order to further reduce the pressure at the top of the column due to the large evaporation amount of the material in the column, the rectifying column 100 in this embodiment sets the column diameter of the rectifying section 110 to be larger than that of the stripping section 120. Due to the increase of the tower diameter of the rectifying section 110, more gas-phase materials can be contained in the rectifying section 110, so that the air pressure at the top of the tower is further reduced, the negative pressure state in the rectifying tower 100 is lower, the boiling point of distillate at the top of the tower is lower, the production can be met by using low-pressure high-temperature steam, the energy consumption is reduced, the product quality is stabilized, and the productivity is greatly improved.

As an alternative, the range of the column diameter of the rectifying section 110 is 1100mm to 1300mm, and the range of the column diameter of the stripping section 120 is 900mm to 1000 mm. In some embodiments, the column diameter of the rectifying section 110 may be 1100mm, 1150mm, 1200mm, 1250mm or 1300mm, and the column diameter of the stripping section 120 may be 900mm, 925mm, 950mm, 975mm or 1000mm, which is not described in detail herein.

As a preferable scheme, the diameter of the first pipeline 410 may also be increased correspondingly, for example, the diameter of the first pipeline 410 ranges from 90mm to 110 mm. Illustratively, the pipe diameter of the first pipeline 410 may be 90mm, 95mm, 100mm, 105mm or 110mm, which is not described in detail herein.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A rectification device for heat-sensitive chemical products is characterized by comprising:

the rectifying tower (100) comprises a rectifying section (110) and a stripping section (120), a first feeding hole (101), a second feeding hole (102) and a supplementary material inlet are formed in the wall of the rectifying tower (100), the supplementary material inlet is formed in the stripping section (120) and used for supplementing materials into the rectifying tower (100), the first feeding hole (101) is formed between the rectifying section (110) and the stripping section (120), the second feeding hole (102) is formed in the rectifying section (110), a first discharging hole (103) and a second discharging hole (104) are further formed in the rectifying tower (100), the first discharging hole (103) is formed in the bottom of the rectifying tower (100), and the second discharging hole (104) is formed in the top of the rectifying tower (100);

a reboiler (200), an outlet of the reboiler (200) is communicated with the first feed port (101), and the reboiler (200) is used for heating the material entering the rectifying tower (100);

the circulating pump (300) is arranged between the rectifying tower (100) and the reboiler (200), the inlet of the circulating pump (300) is communicated with the first discharge hole (103), and the outlet of the circulating pump (300) is communicated with the inlet of the reboiler (200);

the gas-liquid separation tank (400) comprises a gas phase inlet and a liquid phase outlet, the gas phase inlet is communicated with the second discharge hole (104) through a first pipeline (410), the liquid phase outlet is respectively communicated with the second feed port (102) and the liquid storage tank (500), and the liquid storage tank (500) is used for collecting liquid phase materials;

condensing equipment (600), condensing equipment (600) includes one-level condenser (610) and secondary condenser (620), one-level condenser (610) with secondary condenser (620) set up on first pipeline (410), one-level condenser (610) with secondary condenser (620) are used for right gaseous material cools off in first pipeline (410).

2. The device for rectifying heat-sensitive chemical products according to claim 1, wherein the column diameter of the rectifying section (110) is larger than the column diameter of the stripping section (120).

3. The rectification device for the heat-sensitive chemical products according to claim 2, wherein the tower diameter of the rectification section (110) ranges from 1100mm to 1300mm, and the tower diameter of the stripping section (120) ranges from 900mm to 1000 mm.

4. The rectification apparatus of heat-sensitive chemical products according to claim 1, further comprising a vacuum pumping device, wherein the vacuum pumping device is communicated with the gas-liquid separation tank (400), and is used for adjusting the vacuum degree inside the rectification tower (100).

5. The apparatus for rectifying heat-sensitive chemical products according to claim 4, wherein the pressure inside the rectifying tower (100) is maintained at-0.0995 MPa to-0.0990 MPa.

6. The rectification apparatus of heat-sensitive chemical products according to claim 4, wherein the evacuation device is a vacuum pump, and the vacuum pump is communicated with the gas-liquid separation tank (400).

7. The device for rectifying heat-sensitive chemical products according to claim 1, wherein the coolant used by said primary condenser (610) is water.

8. The device for rectifying heat-sensitive chemical products according to claim 1, wherein the coolant used by said secondary condenser (620) is a refrigerating fluid.

9. The rectification device of the heat-sensitive chemical product according to claim 1, wherein the liquid phase outlet is communicated with a second pipeline (420), the other end of the second pipeline (420) is simultaneously communicated with a third pipeline (430) and a fourth pipeline (440), the third pipeline (430) is communicated with the second feed port (102), and the fourth pipeline (440) is communicated with the liquid storage tank (500).