CN219595894U - Device for recycling effective components in light heavy oil - Google Patents
Device for recycling effective components in light heavy oil Download PDFInfo
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- CN219595894U CN219595894U CN202320765255.1U CN202320765255U CN219595894U CN 219595894 U CN219595894 U CN 219595894U CN 202320765255 U CN202320765255 U CN 202320765255U CN 219595894 U CN219595894 U CN 219595894U
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Abstract
The utility model relates to the technical field of light and heavy oil recovery, in particular to equipment for recovering effective components in light and heavy oil. In order to solve the problem that the prior equipment for recycling the effective components of the light heavy oil can not obtain higher economic benefit, the novel equipment for recycling the effective components in the light heavy oil is provided, and comprises a rectifying tower for inputting the light heavy oil, wherein the top outlet of the rectifying tower is sequentially communicated with a condenser, a reflux tank and a reflux pump, one outlet of the reflux pump is communicated with the reflux port of the rectifying tower, and the other outlet of the reflux pump is used for extracting the light components containing a small part of cyclohexanone; the outlet of the tower kettle of the rectifying tower is communicated with the inlet of a tower kettle discharge pump, and the outlet of the tower kettle discharge pump is used for extracting heavy components containing a small part of cyclohexanol; the outlet of the side stream pump is used for extracting the cyclohexanone alcohol mixture formed by cyclohexanol and cyclohexanone, the engineering consumption of the equipment is lower, and the generated economic benefit is high.
Description
Technical Field
The utility model relates to the technical field of light and heavy oil recovery, in particular to equipment for recovering effective components in light and heavy oil.
Background
Cyclohexanone is an important one of the organic chemical raw materials, and 85% of cyclohexanone is mainly used for preparing adipic acid and caprolactam in China, and the rest is used as a diluent and a solvent. Cyclohexanone has wide application in the industrial sectors of paint, rubber auxiliary agent, dye, synthetic fiber, pesticide and the like, for example, high-purity cyclohexanone is used for preparing high-purity caprolactam, and high-performance nylon-6 polymer material needs high-purity caprolactam.
The byproducts in the cyclohexanol dehydrogenation process are more, impurities mainly comprise benzene, cyclohexane, cyclohexene, cyclohexenone, phenol and 2-cyclohexylidene cyclohexanone, some of the impurities are very similar to the boiling point of cyclohexanone, and the impurities are difficult to separate cleanly only through common rectification of products, and have adverse effects on the reaction processes such as oximation of cyclohexanone, beckmann rearrangement of ketoxime and the like and on the quality of final caprolactam. If the rectification is carried out by considering a newly added tower, the light component generated by the dehydrogenation side reaction of the cyclohexanol is close to the boiling point of cyclohexanone, mainly comprises substances such as 2-methylcyclopentanone, 3-methylcyclopentanone and the like, so that the energy consumption of unit products is higher, and the benefits generated by higher equipment investment and steam consumption are not obvious under the condition that the gap between the cyclohexanone and the light component is not too large, so that a new equipment scheme is needed to be considered.
Disclosure of Invention
The utility model aims to solve the problem that the obtained product cannot obtain higher economic benefit due to higher engineering consumption of the existing equipment for recovering the effective components of the light heavy oil, and provides novel equipment for recovering the effective components of the light heavy oil.
The utility model is realized by adopting the following technical scheme:
the equipment for recycling the effective components in the light heavy oil comprises a rectifying tower, a side pump, a filter, a reboiler for providing a steam heat source for the rectifying tower, a condenser, a reflux tank, a reflux pump provided with one inlet and two outlets, a vacuum pump for providing vacuum for the rectifying tower through the condenser, and a tower kettle discharging pump, wherein the rectifying tower is provided with a raw material inlet, a tower side outlet positioned at the middle section of the raw material inlet, a tower top outlet, a reflux mouth and a tower kettle outlet; the outlet of the tower kettle of the rectifying tower is communicated with the inlet of a tower kettle discharge pump, and the outlet of the tower kettle discharge pump is used for extracting heavy components containing a small part of cyclohexanol; the outlet of the side stream pump is used for extracting cyclohexanone alcohol mixture formed by cyclohexanol and cyclohexanone.
The working process comprises the following steps: 1) Feeding light and heavy oil containing cyclohexanone, cyclohexanol, light components and heavy components into a filter to filter hydration catalyst therein; 2) The filtered light and heavy oil enters a rectifying tower, and steam is introduced into the rectifying tower as a heat source through a reboiler; 3) The method comprises the steps of separating light and heavy oil by a rectifying tower, wherein the pressure in the rectifying tower is 5KpaA, the temperature of a tower bottom is 140 ℃, light components containing a small part of cyclohexanone are discharged from the top of the rectifying tower and sequentially pass through a condenser, a reflux tank and a reflux pump, one part of light components containing a small part of cyclohexanone in the reflux tank is returned to the rectifying tower through the reflux pump, and the rest light components containing a small part of cyclohexanone are extracted through the reflux pump; a cyclohexanone alcohol mixture formed by cyclohexanol and cyclohexanone is laterally extracted by a lateral line pump in the middle section of the rectifying tower; heavy components containing a small part of cyclohexanol are extracted from the tower bottom of the rectifying tower by a tower bottom discharge pump.
Description of principle: since the boiling points of cyclohexanol and cyclohexanone (the boiling point of cyclohexanone is 155.6 and the boiling point of cyclohexanol is 159 ℃) are relatively close, but the boiling points of the cyclohexanol and the light component (the boiling point of the light component is less than 145 ℃) and the boiling point of the heavy component (the boiling point of the heavy component is more than 166 ℃) are obviously distinguished, in the whole rectifying tower, all components are separated according to the boiling points, high-boiling substances are distributed at the tower bottom, low-boiling substances are distributed at the tower top, and the cyclohexanol and the cyclohexanone are mainly distributed at the middle section of the rectifying tower according to the boiling points, therefore, the cyclohexanone and the cyclohexanol can be extracted from the side line of the middle section of the rectifying tower as a cyclohexanone alcohol mixture, and the extracted cyclohexanone alcohol mixture can be directly used for preparing adipic acid or the cyclohexanone after the cyclohexanone and the cyclohexanol are separated by the ketone tower and then can be used for preparing caprolactam.
Further, the equipment also comprises a heat exchanger provided with a cold source inlet, a cold source outlet, a heat source inlet and a heat source outlet, wherein the cold source inlet of the heat exchanger is communicated with the outlet of the filter, the cold source outlet of the heat exchanger is communicated with the raw material inlet of the rectifying tower, the heat source inlet of the heat exchanger is communicated with the outlet of the side pump, and the heat source outlet of the heat exchanger is used for extracting the cyclohexanone alcohol mixture formed by cyclohexanol and cyclohexanone, so that the filtered light and heavy oil exchanges heat with the cyclohexanone alcohol mixture extracted by the side pump through the heat exchanger and then enters the rectifying tower, the aim of recovering heat of the cyclohexanone alcohol mixture extracted by the side pump is fulfilled, and the aim of saving energy and reducing carbon is fulfilled.
The beneficial effects of the utility model are as follows: the utility model skillfully utilizes the property of centering the boiling point of the cyclohexanone alcohol mixture, lateral pumps are utilized to laterally extract the cyclohexanone alcohol mixture, light components containing less part of cyclohexanone are extracted after condensing and refluxing at the top of the tower, heavy components containing less part of cyclohexanol are extracted through the tower kettle, the extracted cyclohexanone alcohol mixture can be directly sent into an adipic acid device to be directly used for manufacturing adipic acid or the cyclohexanone is used for manufacturing caprolactam after separating the cyclohexanone and the cyclohexanol by a ketone tower, so that the effective components in the light heavy oil are effectively utilized, the engineering consumption of the method is lower, and the produced economic benefit is high.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural view of an apparatus for recovering an effective component in light heavy oil according to the present utility model.
In the figure: 1-rectifying tower, 2-reboiler, 3-side line pump, 4-heat exchanger, 5-condenser, 6-reflux drum, 7-reflux pump, 8-tower kettle discharge pump, 9-filter, 10-vacuum pump.
Description of the embodiments
In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be made. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.
In the description, it should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms described above will be understood by those of ordinary skill in the art as the case may be.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the utility model.
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, an apparatus for recovering an effective component in light heavy oil comprises a rectifying tower 1, a side line pump 3, a filter 9, a reboiler 2 for providing a steam heat source for the rectifying tower 1, a condenser 5, a reflux tank 6, a reflux pump 7 provided with one inlet and two outlets, a vacuum pump 10 for providing vacuum for the rectifying tower 1 through the condenser 5, a tower kettle discharge pump 8, wherein the rectifying tower 1 is provided with a raw material inlet, a tower side outlet positioned at the middle section of the raw material inlet, a tower top outlet, a reflux port and a tower kettle outlet, the inlet of the filter 9 is used for inputting light and heavy oil containing cyclohexanone, cyclohexanol, light components and heavy components, the outlet of the filter 9 is communicated with a raw material inlet of the rectifying tower 1, the tower top outlet of the rectifying tower 1 is communicated with an input port of the condenser 5, the output port of the condenser 5 is communicated with an inlet of the reflux tank 6, one outlet of the reflux tank 6 is communicated with an inlet of the reflux pump 7, and the other outlet of the reflux pump 7 is used for extracting light components containing a small part of cyclohexanone; the outlet of the tower kettle of the rectifying tower 1 is communicated with the inlet of a tower kettle discharge pump 8, and the outlet of the tower kettle discharge pump 8 is used for extracting heavy components containing a small part of cyclohexanol; the outlet of the rectifying tower 1 at the tower side is communicated with the inlet of a side line pump 3, and the outlet of the side line pump 3 is used for extracting a cyclohexanone alcohol mixture formed by cyclohexanol and cyclohexanone.
The specific working process comprises the following steps: 1) Feeding light and heavy oil containing 26.6% of cyclohexanone, 60% of cyclohexanol, 0.1% of light components and 13.3% of heavy components into a hydration catalyst filtered in a filter 9, wherein the total of the light and heavy oil is 562kg/h; 2) The filtered light and heavy oil enters a rectifying tower 1, and meanwhile, steam with the temperature of 254 ℃ and the pressure of 3.8MPaG is used as a heat source to be introduced into the rectifying tower 1 through a reboiler 2; 3) The rectifying tower 1 separates light and heavy oil, at the moment, the pressure in the rectifying tower 1 is 5KpaA, the temperature of a tower bottom is 140 ℃, the light component containing less cyclohexanone is discharged from the top of the rectifying tower 1 and sequentially passes through a condenser 5 and a reflux tank 6, one part of the light component containing less cyclohexanone in the reflux tank 6 is returned to the rectifying tower 1 through a reflux pump 7, the rest light component containing less cyclohexanone is extracted through the reflux pump, the total extraction amount is 1000kg/h, wherein the cyclohexanone content is 20%, and the light oil content is 80%; the cyclohexanone alcohol mixture formed by the cyclohexanol and the cyclohexanone is extracted from the middle section of the rectifying tower 1 by a side pump 3 in a side way, the extraction amount is 470kg/h, the temperature is 120 ℃, the cyclohexanone content is 32.1 percent, and the cyclohexanol content is 67.9 percent; the heavy component containing a small part of cyclohexanol is extracted by a tower kettle discharge pump 8 of a rectifying tower 1, wherein the extraction amount is 93.43kg/h, and the cyclohexanol content is 20% and the heavy component content is 80%.
Description of principle: since the boiling points of cyclohexanol and cyclohexanone (boiling point of cyclohexanone is 155.6 and boiling point of cyclohexanol is 159 ℃) are relatively close, but have obvious distinction from the boiling points of light component (boiling point of light component < 145 ℃) and heavy component (boiling point of heavy component > 166 ℃) as shown in table 1, in the whole rectifying tower 1, each component is separated according to the boiling point, high boiling point substances are distributed at the tower bottom, low boiling point substances are distributed at the tower top, and cyclohexanol and cyclohexanone are mainly distributed at the middle section of rectifying tower 1 according to the boiling point, therefore, cyclohexanone and cyclohexanol can be extracted from the side line of the middle section of rectifying tower 1 as a mixture of cyclohexanone alcohol, and the obtained mixture of cyclohexanone alcohol can be directly used for preparing adipic acid or cyclohexanone can be used for preparing caprolactam after separating cyclohexanone and cyclohexanol by a ketone tower.
TABLE 1 boiling points of cyclohexanone, cyclohexanol, light and heavy components
In specific implementation, the device further comprises a heat exchanger 4 provided with a cold source inlet, a cold source outlet, a heat source inlet and a heat source outlet, wherein the cold source inlet of the heat exchanger 4 is communicated with the outlet of the filter 9, the cold source outlet of the heat exchanger 4 is communicated with the raw material inlet of the rectifying tower 1, the heat source inlet of the heat exchanger 4 is communicated with the outlet of the side pump 3, and the heat source outlet of the heat exchanger 4 is used for extracting a cyclohexanone alcohol mixture formed by cyclohexanol and cyclohexanone, so that filtered light and heavy oil enters the rectifying tower 1 after exchanging heat with the cyclohexanone alcohol mixture extracted by the side pump 3 through the heat exchanger 4, the purpose of recovering heat of the cyclohexanone alcohol mixture extracted by the side pump 3 is achieved, and the purpose of energy conservation and carbon reduction is achieved.
The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Although described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and they should be construed as covering the scope of the appended claims.
Claims (2)
1. The equipment for recycling the effective components in the light heavy oil is characterized by comprising a rectifying tower (1), a side line pump (3), a filter (9), a reboiler (2) for providing a steam heat source for the rectifying tower (1), a condenser (5), a reflux tank (6), a reflux pump (7) with one inlet and two outlets, a vacuum pump (10) for providing vacuum for the rectifying tower (1) through the condenser (5) and a tower bottom discharging pump (8), wherein the rectifying tower (1) is provided with a raw material inlet, a tower side outlet positioned at the middle section, a tower top outlet, a reflux mouth and a tower bottom outlet, the inlet of the filter (9) is used for inputting the light heavy oil containing cyclohexanone, cyclohexanol, light components and heavy components, the outlet of the filter (9) is communicated with the raw material inlet of the rectifying tower (1), the outlet of the rectifying tower (1) is communicated with the input port of the condenser (5), the output port of the condenser (5) is communicated with the inlet of the reflux tank (6), the outlet of the reflux tank (6) is communicated with the inlet of the reflux pump (7), and the outlet of one of the reflux pump (7) is communicated with the reflux outlet of the other rectifying tower (1) and the reflux pump (7) is used for recycling the light heavy oil; the outlet of the tower kettle of the rectifying tower (1) is communicated with the inlet of a tower kettle discharging pump (8), and the outlet of the tower kettle discharging pump (8) is used for extracting heavy components containing a small part of cyclohexanol; the outlet of the rectifying tower (1) at the tower side is communicated with the inlet of a side line pump (3), and the outlet of the side line pump (3) is used for extracting a cyclohexanone alcohol mixture formed by cyclohexanol and cyclohexanone.
2. The apparatus for recovering an effective component from light heavy oil according to claim 1, further comprising a heat exchanger (4) having a cold source inlet, a cold source outlet, a heat source inlet, and a heat source outlet provided thereon, the cold source inlet of the heat exchanger (4) being communicated with the outlet of the filter (9), the cold source outlet of the heat exchanger (4) being communicated with the raw material inlet of the rectifying column (1), the heat source inlet of the heat exchanger (4) being communicated with the outlet of the side pump (3), the heat source outlet of the heat exchanger (4) being for extracting a cyclohexanone alcohol mixture formed of cyclohexanol and cyclohexanone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320765255.1U CN219595894U (en) | 2023-04-10 | 2023-04-10 | Device for recycling effective components in light heavy oil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320765255.1U CN219595894U (en) | 2023-04-10 | 2023-04-10 | Device for recycling effective components in light heavy oil |
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| CN219595894U true CN219595894U (en) | 2023-08-29 |
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| CN202320765255.1U Active CN219595894U (en) | 2023-04-10 | 2023-04-10 | Device for recycling effective components in light heavy oil |
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- 2023-04-10 CN CN202320765255.1U patent/CN219595894U/en active Active
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