Alcohol extraction device for dioctyl phthalate production system

Abstract

The utility model discloses an alcohol extraction device for a dioctyl phthalate production system, which comprises an alcohol extraction tower feed tank, a low-boiling-point substance recovery tank and a gas phase condenser, the alcohol extraction tower feed tank is connected with an alcohol extraction tower feed pump, the alcohol extraction tower feed pump is connected with an alcohol extraction tower feed regulating valve, and the low-boiling-point substance recovery tank is connected with the gas phase condenser. An alcohol extraction tower feeding flow meter is mounted in front of the alcohol extraction tower feeding regulating valve, and the top of the alcohol extraction tower is connected with a gas phase condenser, an alcohol extraction tower reflux regulating valve, an alcohol extraction tower reflux pipeline and a low-boiling-point substance recovery tank. The gas phase condenser is connected with a vacuum pump, and the bottom of the gas phase condenser is connected with a low-boiling-point substance recovery tank. The middle part of the alcohol extraction tower is connected with an octanol tank, a heater at the bottom of the alcohol extraction tower is connected with an octanol discharge pump, and the octanol discharge pump is connected with an octanol discharge regulating valve. According to the utility model, the alcohol extraction device is arranged, so that the purposes of separating organic waste liquid and recovering raw material alcohol are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of recovery and separation of organic waste liquid in dioctyl phthalate (DOP) production, in particular to an alcohol extraction device used in a dioctyl phthalate production system. Background Art

[0002] Dioctyl phthalate is an organic substance used to manufacture dyes, polyester resins, polyester, drugs and plasticizers. The by-product produced in the production process of dioctyl phthalate is an organic waste liquid produced in the esterification production process, mainly including ether, olefin, acetal, isopropyl ester, octanol, DOP, etc.

[0003] Organic waste liquid is generally treated by a third party, which generally has high treatment costs and low efficiency. Therefore, a device is needed to improve the above problems. Utility Model Content

[0004] The utility model aims to provide an alcohol extraction device for a dioctyl phthalate production system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an alcohol extraction device for a dioctyl phthalate production system, comprising an alcohol extraction tower feed tank, a low-boiling-point recovery tank and a gas phase condenser, wherein the alcohol extraction tower feed tank is connected to an alcohol extraction tower feed pump, the alcohol extraction tower feed pump is connected to an alcohol extraction tower feed regulating valve, and an alcohol extraction tower feed flowmeter is installed on the alcohol extraction tower feed regulating valve, the alcohol extraction tower is respectively connected to the alcohol extraction tower feed regulating valve, the alcohol extraction tower reflux pipeline, an octanol tank, an alcohol extraction tower bottom heater and an octanol discharge pump, the octanol discharge pump is connected to the octanol discharge regulating valve, the low-boiling-point recovery tank is connected to the alcohol extraction tower reflux pipeline, the gas phase condenser is connected to one end of the alcohol extraction tower away from the alcohol extraction tower bottom heater, and the gas phase condenser is connected to a vacuum pump.

[0006] Preferably, the alcohol stripping tower, the gas phase condenser and the low-boiling-point recovery tank are interconnected.

[0007] Preferably, the octanol tank is connected to the octanol discharge pump via a pipeline.

[0008] Preferably, a conveying pipeline is connected between the alcohol extraction tower bottom heater and the alcohol extraction tower.

[0009] Preferably, the gas phase condenser is connected to the vacuum pump via a pipeline.

[0010] Preferably, the alcohol extraction tower, octanol tank and octanol discharge pump are interconnected.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] When the device is in use, the mixed alcohol is heated under negative pressure and separated inside the alcohol extraction tower to realize the recovery of the raw material octanol, which can solve the current problems of waste of raw materials and high processing costs in waste liquid. During the alcohol extraction process, fully enclosed processing is achieved, which is safe and environmentally friendly, and the octanol is recovered for secondary use, thereby improving the utilization rate and reducing the production cost of DOP. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall process of the utility model.

[0014] In the figure: 1-gas phase condenser, 2-vacuum pump, 3-alcohol extracting tower reflux pipeline, 4-low boiling point recovery tank, 5-alcohol extracting tower feed flowmeter, 6-alcohol extracting tower feed regulating valve, 7-alcohol extracting tower feed pump, 8-mixed alcohol, 9-alcohol extracting tower feed tank, 10-alcohol extracting tower, 11-octanol tank, 12-octanol discharge regulating valve, 13-octanol discharge pump, 14-alcohol extracting tower bottom heater. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1 The utility model provides an embodiment: an alcohol stripping device for a dioctyl phthalate production system, comprising an alcohol stripping tower feed tank, a low-boiling-point recovery tank 4 and a gas phase condenser 1, the alcohol stripping tower feed tank 9 is connected to an alcohol stripping tower feed pump 7, the alcohol stripping tower feed pump 7 is connected to an alcohol stripping tower feed regulating valve 6, and an alcohol stripping tower feed regulating valve 6 is installed with an alcohol stripping tower feed flowmeter 5, an alcohol stripping tower 10 is respectively connected to the alcohol stripping tower feed regulating valve 6, an alcohol stripping tower reflux pipeline 3, an octanol tank 11, an alcohol stripping tower bottom heater 14 and an octanol discharge pump 13, the octanol discharge pump 13 is connected to the octanol discharge regulating valve 12, the low-boiling-point recovery tank 4 is connected to the alcohol stripping tower reflux pipeline 3, the gas phase condenser 1 is connected to one end of the alcohol stripping tower 10 away from the alcohol stripping tower bottom heater 14, and the gas phase condenser 1 is connected to a vacuum pump 2.

[0017] The gas phase condenser 1 is interconnected with the low-boiling-point recovery tank 4, so that the evaporated gas phase can be condensed and then stored in the low-boiling-point recovery tank 4.

[0018] The octanol tank 11 is connected to the octanol discharge pump 13 via a pipeline, so that the octanol tank 11 can output octanol to the dioctyl phthalate production device.

[0019] A pipeline is connected between the bottom heater of the alcohol extraction tower and the alcohol extraction tower to facilitate the heating and evaporation of the materials in the bottom of the tower.

[0020] The alcohol extraction tower 10 , the octanol tank 11 and the octanol discharge pump 13 are interconnected, and octanol can be transferred to the inside of the octanol discharge pump 13 .

[0021] Working principle: when in use, first open the entrance of the alcohol extraction tower feed tank 9, start the alcohol extraction tower feed pump 7, open the alcohol extraction tower feed regulating valve 6, confirm the feed load according to the alcohol extraction tower feed flowmeter 5, send mixed alcohol 8 to the middle and upper inlet of the alcohol extraction tower 10, open the gas phase condenser 1 cooling water, start the vacuum pump 2, and confirm that the pressure of the alcohol extraction tower 10 is reduced to a vacuum state. Start the alcohol extraction tower bottom heater 14, heat the materials in the tower, and the heated materials enter the upper part of the tower, condense through the gas phase condenser 1 in turn, and enter the low-boiling-point recovery tank 4 after becoming a liquid phase. A part of it can return to the top of the alcohol extraction tower 10 after entering the alcohol extraction tower reflux pipeline 3, and a part of it leaves the device through the pipeline of the low-boiling-point recovery tank 4. After the heated octanol gas phase is cooled, it enters the octanol tank 11 through the middle section pipeline of the alcohol extraction tower 10, and the octanol separated is finally transported out of the device by the octanol discharge pump 13 and enters the DOP circulating alcohol system again, completing the separation of octanol and low-boiling-points.

[0022] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An alcohol extraction device for a dioctyl phthalate production system, comprising an alcohol extraction tower feed tank (9), a low-boiling-point recovery tank (4) and a gas phase condenser (1), characterized in that: The alcohol extracting tower feed tank (9) is connected to the alcohol extracting tower feed pump (7), the alcohol extracting tower feed pump (7) is connected to the alcohol extracting tower feed regulating valve (6), and the alcohol extracting tower feed regulating valve (6) is equipped with an alcohol extracting tower feed flowmeter (5), the alcohol extracting tower (10) is respectively connected to the alcohol extracting tower feed regulating valve (6), the alcohol extracting tower reflux pipeline (3), the octanol tank (11), the alcohol extracting tower bottom heater (14) and the octanol discharge pump (13), the octanol discharge pump (13) is connected to the octanol discharge regulating valve (12), the low boiling point recovery tank (4) is connected to the alcohol extracting tower reflux pipeline (3), the gas phase condenser (1) is connected to one end of the alcohol extracting tower (10) away from the alcohol extracting tower bottom heater (14), and the gas phase condenser (1) is connected to a vacuum pump (2).

2. The alcohol extraction device for a dioctyl phthalate production system according to claim 1, characterized in that: The alcohol stripping tower (10), the gas phase condenser (1) and the low-boiling-point recovery tank (4) are interconnected.

3. The alcohol extraction device for a dioctyl phthalate production system according to claim 2, characterized in that: The octanol tank (11) and the octanol discharge pump (13) are connected via a pipeline.

4. The alcohol extraction device for a dioctyl phthalate production system according to claim 3, characterized in that: A delivery pipeline is connected between the alcohol extraction tower bottom heater (14) and the alcohol extraction tower (10).

5. The alcohol extraction device for a dioctyl phthalate production system according to claim 4, characterized in that: The gas phase condenser (1) and the vacuum pump (2) are connected via a pipeline.

6. The alcohol extraction device for a dioctyl phthalate production system according to claim 5, characterized in that: The alcohol extraction tower (10), the octanol tank (11) and the octanol discharge pump (13) are interconnected.

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