System for separating alcohol ketone and medium oil
By designing a system to separate alcohol ketone and medium oil, using a compressor to recover the top vapor and adding a separating agent, the problem of unutilized oily waste liquid in cyclohexanol ketone production was solved, achieving energy conservation, emission reduction and cost reduction.
Patent Information
- Application Number
- CN202422616663.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-10-29
AI Technical Summary
In the prior art, the oily waste liquid generated during the production of cyclohexanol ketone is not effectively utilized, resulting in losses for the enterprise.
A system for separating alcohols, ketones and crude oil was designed, including a separation tank, a mixing tank, a crude oil distillation tower, a heat exchanger, and related equipment. A compressor was used to recover overhead steam, a heat pump system was used to improve thermal energy utilization, and a separation aid was added to the crude oil distillation tower for material mixing and separation.
The effective separation of cyclohexanol ketone and crude oil is achieved, which reduces the use of steam and coal, lowers production costs, protects the environment, and saves enterprise costs.
Smart Images
Figure CN223474433U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power construction technology, specifically to a tool for grinding external corners. Background Technology
[0002] In the production of cyclohexanone, the complex feeding process in the early stage leads to a large amount of oily waste liquid generated in the later distillation unit. In the current technology, this waste liquid is stored in waste liquid storage tanks and sold directly after reaching a certain level, which causes great losses to enterprises. Utility Model Content
[0003] To address the aforementioned problems, this utility model discloses a system for separating alcohols, ketones, and intermediate oils. This system solves the problem of waste caused by the direct discharge of mixed materials in the prior art.
[0004] A system for separating alcohols, ketones, and intermediate oil includes a separation tank, a mixing tank, an intermediate oil distillation column, and a heat exchanger connected in sequence. The intermediate oil distillation column is connected to a first reboiler, the outlet of which is connected to a buffer tank. The top outlet of the intermediate oil distillation column is connected to a compressor, which is connected to the first reboiler. The mixing tank is connected to a dispensing aid storage tank.
[0005] Preferably, the mixing tank is equipped with a stirrer.
[0006] Preferably, the intermediate oil distillation column is also connected to a second reboiler.
[0007] Preferably, the separation tank is equipped with a demister and the top of the separation tank is equipped with a grid plate.
[0008] Preferably, the outlet of the first reboiler is provided with two pipelines, one of which is connected to the buffer tank and the other is connected to the intermediate oil distillation column.
[0009] Preferably, a vertical partition is provided inside the buffer tank, the bottom of the vertical partition is connected to the buffer tank, and the upper end of the vertical partition is at a set distance from the top of the buffer tank.
[0010] Beneficial effects
[0011] This invention solves the problem of using large amounts of hot steam in distillation systems by compressing and recovering the steam at the top of the column, thereby reducing steam usage, further reducing coal consumption, lowering production costs, reducing waste gas emissions, and protecting the environment. By separating cyclohexanone and middle oil, it also saves production costs for enterprises. Attached Figure Description
[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Detailed Implementation
[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0015] The patent relates to a system for separating alcohols, ketones, and heavy oil. The recycling of the product can bring great profits to enterprises, protect the environment, and avoid the previous situation of crude and indiscriminate discharge, which caused waste of by-products. Through qualitative analysis of the materials, the results show that the components can be further separated by distillation.
[0016] like Figure 1 As shown, a middlings distillation column is added after the cyclohexanol distillation column. The material is introduced into the upper part of the column, and high-efficiency polystyrene rings are used as packing inside the column. To save energy, a heat pump is added to the column, introducing the top steam into a compressor. After compression, the steam enters the bottom of the column for heating, improving product purity and increasing heat energy utilization. This saves the company a significant amount of steam, and the middlings can be used as fuel in the boiler. This technology has good scalability and practicality. The boiling points of cyclohexanol ketone, tert-butanol, and benzene are all above 162℃, while the boiling point of middlings is 180℃. By recovering cyclohexanol ketone and tert-butanol, a large amount of intermediate products and auxiliary agents can be saved, reducing costs for the company.
[0017] Before entering the crude oil distillation column, benzene is removed by a flash tank. 1.2 MPa steam is then introduced into the reboiler to heat the crude oil distillation column. The top steam is then pressurized by a compressor and used to heat the column bottom, saving the company a significant amount of steam. This technology has good potential for widespread application. The compressor's function is to input mechanical work according to system requirements, compressing the low-pressure steam to a certain pressure for use as a higher-energy heat source.
[0018] Due to the relatively small material flow rate, the diameter of the distillation tower was selected to be 80m, the main body height of the distillation tower was 60m, and the height of each packing layer was 6m.
[0019] Since the material contains a small amount of benzene, a flash tank is added before entering the distillation column. The pressure of the flash tank is controlled at a vacuum degree of 50 kPa. Two water ring vacuum pumps are added. The temperature of the flash tank is controlled at 60℃. In order to prevent foam from appearing inside the separator and affecting the evaporation of the material, a demister and a grid plate are added inside the separator to block the rise of excessive cyclohexanone. A sight glass is added to the top of the separator for easy observation.
[0020] The CNPC distillation column is equipped with two reboilers. During the initial start-up of the system, the second reboiler is used to heat the bottom light components with primary steam, which evaporates the components. Then, a screw compressor compresses the steam to provide heat energy, and the compressed heating steam is divided into four feed streams to facilitate heat distribution. The low-temperature, low-pressure steam from the CNPC distillation column is compressed and heated before entering the first reboiler. The first reboiler is a horizontal reboiler. The condensate enters a buffer tank for condensation and collection, completing the cycle of the heat pump system process. The heating steam from the bottom of the CNPC distillation column is condensed after heat exchange and recovered as a product, entering the cyclohexanone intermediate tank.
[0021] The bottom liquid from the distillation column of Sinopec is sent to the boiler as fuel and sold externally. Before entering the distillation column, it passes through a flash tank to remove trace amounts of benzene.
[0022] To improve product separation and conserve energy, a separating agent is added before the material enters the distillation tower. This agent is then pumped into the agitator via a metering pump for thorough mixing. To ensure complete mixing of the raw material and the separating agent, a frame agitator is added to the separation tank to stir the mixture. This stirring also breaks down the material's morphology, making it more slippery and facilitating separation.
[0023] The buffer tank is equipped with a vertical baffle. The lower part of the vertical baffle is connected to the bottom of the buffer tank, and the upper part is separated from the top of the buffer tank by a set distance. Cyclohexanone is displayed on the left side above the baffle, and impurities on the right side accumulate to a certain level before being discharged.
[0024] Although the specific embodiments of this patent have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this patent. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of this patent are still within the scope of protection of this patent.
Claims
1. A system for separating alcohols, ketones, and middle oils, characterized in that, The system includes a separation tank, a mixing tank, a middle oil distillation column, and a heat exchanger connected in sequence. The middle oil distillation column is connected to a first reboiler, the outlet of which is connected to a buffer tank. The top outlet of the middle oil distillation column is connected to a compressor, which is connected to the first reboiler. The mixing tank is connected to a dispensing aid storage tank.
2. The system for separating alcohols, ketones, and intermediate oils according to claim 1, characterized in that, The mixing tank is equipped with a stirrer.
3. The system for separating alcohols, ketones, and intermediate oils according to claim 1, characterized in that, The oil distillation column is also connected to a second reboiler.
4. The system for separating alcohols, ketones, and intermediate oils according to claim 1, characterized in that, The separator is equipped with a demister and a grating plate on the top.
5. The system for separating alcohols, ketones, and intermediate oils according to claim 1, characterized in that, The outlet of the first reboiler is provided with two pipelines, one of which is connected to the buffer tank and the other is connected to the crude oil distillation column.
6. The system for separating alcohols, ketones, and intermediate oils according to claim 1, characterized in that, The buffer tank is equipped with a vertical partition, the bottom of which is connected to the buffer tank, and the upper end of which is a set distance from the top of the buffer tank.