Fluorobenzene continuous rectification device

Abstract

The utility model discloses a fluorobenzene continuous rectification device which comprises a fluorobenzene raw material tank, a light component removal tower and a refining tower, wherein the fluorobenzene raw material tank is connected with a feed port of the light component removal tower through a fluorobenzene raw material conveying pipeline, a discharge end at the bottom of the light component removal tower is connected with a feed port of the refining tower, a fluorobenzene discharge end is arranged on one side of the upper part of a tower body of the refining tower, and the fluorobenzene discharge end is connected with the fluorobenzene product tank; according to the utility model, the on-line continuous rectification treatment of the fluorobenzene crude product is realized, the rectification time of the fluorobenzene crude product is obviously shortened, the energy consumption of the fluorobenzene production device is reduced, the requirements of increasing the yield of the fluorobenzene finished product and optimizing the energy consumption are met, and the device is very suitable for industrial scale application.

Description

Technical Field

[0001] The utility model belongs to the field of fluorobenzene preparation devices, and particularly relates to a fluorobenzene continuous distillation device. Background Art

[0002] The distillation process in existing fluorobenzene production equipment generally uses single-pot intermittent production equipment such as steam distillation, atmospheric distillation, and dehydration to distill the product. Each batch takes about 26 hours, and an average of about 6.6 tons of product is processed per day. This results in a long distillation cycle of fluorobenzene, high energy consumption and relatively low production efficiency.

[0003] For this reason, the present applicant hopes to develop a fluorobenzene continuous distillation device suitable for industrial-scale application. Summary of the Invention

[0004] In view of this, the purpose of the utility model is to provide a continuous distillation device for fluorobenzene, which can realize online continuous distillation treatment of crude fluorobenzene, significantly shorten the distillation time of crude fluorobenzene, reduce the energy consumption of fluorobenzene production equipment, meet the needs of increasing the output of fluorobenzene products and optimizing energy use, and is very suitable for industrial-scale application.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A fluorobenzene continuous distillation device comprises a fluorobenzene raw material tank (for storing crude fluorobenzene), a lightness removal tower and a refining tower; wherein the fluorobenzene raw material tank is connected to the feed port of the lightness removal tower via a fluorobenzene raw material conveying pipeline, the bottom discharge end of the lightness removal tower is connected to the feed port of the refining tower, and a fluorobenzene discharge end is provided on one side of the upper part of the tower body of the refining tower, and the fluorobenzene discharge end is connected to a fluorobenzene product tank.

[0007] Preferably, a fluorobenzene raw material pump is installed on the fluorobenzene raw material delivery pipeline, and a lightness removal tower bottom pump is installed on the delivery pipeline between the bottom discharge end of the lightness removal tower and the feed inlet of the refining tower.

[0008] Preferably, the light component outlet located at the upper part of the light component removal tower body is connected to the light component collection device; wherein, the top outlet of the light component removal tower is connected to the first condenser, and after condensation treatment, the outlet end of the first condenser is connected to the light component collection device through a light component conveying pipeline.

[0009] Preferably, a light component removal tower reflux tank is installed on the light component conveying pipeline, wherein the outlet of the light component removal tower reflux tank is connected to the light component collecting device for conveying via a light component removal tower reflux pump.

[0010] Preferably, the bottom discharge end of the light-removal tower is connected to the feed inlet of the refining tower through a bottom pump of the light-removal tower.

[0011] Preferably, the top outlet of the refining tower is connected to the second condenser, and after condensation treatment, the outlet end of the second condenser is connected to the fluorobenzene product tank through a fluorobenzene refining recovery pipeline.

[0012] Preferably, a refining tower reflux tank is installed on the fluorobenzene refining recovery pipeline, wherein the outlet of the refining tower reflux tank is connected to the fluorobenzene product tank for transportation via a refining tower reflux pump.

[0013] Preferably, the lightness removal tower and the refining tower are both plate-type packed towers.

[0014] Preferably, the fluorobenzene product tank transports the fluorobenzene product to the fluorobenzene tank area of ​​the production line through a product delivery pump.

[0015] Preferably, a refining tower loop is provided between the bottom of the refining tower and the kettle; wherein a refining tower recovery pump is provided on the refining tower loop; and the bottom outlet of the refining tower transports the heavy component to the light component collection device through the refining tower bottom pump.

[0016] In order to improve the comprehensive efficiency of the production equipment, the present application realizes online continuous distillation treatment of the crude fluorobenzene by continuously conveying and feeding the crude fluorobenzene through a lightness removal tower and a refining tower, which significantly shortens the distillation time of the crude fluorobenzene and reduces the energy consumption of the fluorobenzene production equipment, meets the needs of increasing the output of fluorobenzene products and optimizing energy use, and is very suitable for industrial-scale application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a fluorobenzene continuous distillation device according to a specific embodiment of the present application. DETAILED DESCRIPTION

[0018] This embodiment provides a fluorobenzene continuous distillation device, including a fluorobenzene raw material tank (for storing crude fluorobenzene), a lightness removal tower and a refining tower; wherein the fluorobenzene raw material tank is connected to the feed port of the lightness removal tower through a fluorobenzene raw material conveying pipeline, the bottom discharge end of the lightness removal tower is connected to the feed port of the refining tower, and a fluorobenzene discharge end is provided on one side of the upper part of the tower body of the refining tower, and the fluorobenzene discharge end is connected to the fluorobenzene product tank.

[0019] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0020] See Figure 1As shown, a fluorobenzene continuous distillation device includes a fluorobenzene raw material tank 1 (for storing fluorobenzene crude product), a lightness removal tower 2 and a refining tower 3; wherein, the fluorobenzene raw material tank 1 is connected to the feed port of the lightness removal tower 2 through a fluorobenzene raw material conveying pipeline, the bottom discharge end of the lightness removal tower 2 is connected to the feed port of the refining tower 3, and a fluorobenzene discharge end 3a is provided on one side of the upper part of the tower body of the refining tower 3, and the fluorobenzene discharge end 3a is connected to the fluorobenzene product tank 4; preferably, in this embodiment, the lightness removal tower 2 and the refining tower 3 both adopt plate-type packed towers, utilize two-stage gas-liquid contact separation of light and heavy components, and realize the automatic operation of the lightness removal tower 2 and the refining tower 3 respectively through DCS (distributed control system) control (these are common knowledge in the art and will not be described in detail); preferably, in this embodiment, the fluorobenzene product tank 1 conveys the fluorobenzene product to the fluorobenzene tank area of ​​the production line through the product delivery pump 5;

[0021] Preferably, in order to facilitate continuous online transportation, in the present embodiment, a fluorobenzene raw material pump 6 is installed on the fluorobenzene raw material delivery pipeline, and a lightness removal tower bottom pump 7 is installed on the delivery pipeline between the bottom discharge end of the lightness removal tower 2 and the feed port of the refining tower 3; preferably, in the present embodiment, the bottom discharge end of the lightness removal tower 2 is connected to the feed port of the refining tower 3 through the lightness removal tower bottom pump 7;

[0022] Preferably, in order to facilitate the realization of efficient continuous distillation effect, in the present embodiment, the light component outlet 2a located at the upper part of the light component removal tower body is connected to the light component collecting device 8; wherein, the top outlet 2b of the light component removal tower 2 is connected to the first condenser 9a, and after condensation treatment, the outlet end of the first condenser 9a is connected to the light component collecting device 8 through a light component delivery pipeline; further preferably, in order to further facilitate the realization of continuous online delivery, in the present embodiment, a light component delivery pipeline is installed with a light component removal tower reflux tank 10, wherein the outlet of the light component removal tower reflux tank 10 is connected to the light component collecting device 8 through a light component removal tower reflux pump 11 to realize delivery connection;

[0023] Preferably, in order to facilitate the realization of efficient continuous distillation effect, in the present embodiment, the top outlet 3b of the refining tower 3 is connected to the second condenser 9b, and after condensation treatment, the outlet end of the second condenser 9b is connected to the fluorobenzene product tank 1 through the fluorobenzene refining recovery pipeline; preferably, in order to further facilitate the realization of continuous online transportation, in the present embodiment, a refining tower reflux tank 12 is installed on the fluorobenzene refining recovery pipeline, wherein the outlet of the refining tower reflux tank 12 is connected to the fluorobenzene product tank 1 through the refining tower reflux pump 13;

[0024] Preferably, in order to facilitate the online continuous distillation effect of the refining tower 3, in this embodiment, a refining tower loop is provided between the bottom and the kettle of the refining tower 3; wherein, a refining tower recovery pump 14 is provided on the refining tower loop; and the bottom outlet 3c of the refining tower 3 transports the heavy component to the light component collection device 16 through the refining tower bottom pump 15.

[0025] By implementing and applying the above embodiment, the applicant increased the processing capacity from 0.3 t / h (original intermittent feeding process) to 1.25 t / h, significantly improving the production efficiency of the fluorobenzene production device.

[0026] In order to improve the comprehensive efficiency of the production device, this embodiment continuously conveys and feeds the crude fluorobenzene through the lightness removal tower 2 and the refining tower 3 to achieve online continuous distillation treatment of the crude fluorobenzene, which significantly shortens the distillation time of the crude fluorobenzene and reduces the energy consumption of the fluorobenzene production device, meeting the needs of increasing the output of fluorobenzene products and optimizing energy use, and is very suitable for industrial-scale application.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0028] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A fluorobenzene continuous distillation device, characterized in that: It includes a fluorobenzene raw material tank, a lightness removal tower and a refining tower; wherein, the fluorobenzene raw material tank is connected to the feed port of the lightness removal tower through a fluorobenzene raw material conveying pipeline, the bottom discharge end of the lightness removal tower is connected to the feed port of the refining tower, and a fluorobenzene discharge end is provided on one side of the upper part of the tower body of the refining tower, and the fluorobenzene discharge end is connected to the fluorobenzene product tank.

2. The continuous distillation device for fluorobenzene according to claim 1, wherein A fluorobenzene raw material pump is installed on the fluorobenzene raw material conveying pipeline, and a lightness removal tower bottom pump is installed on the conveying pipeline between the bottom discharge end of the lightness removal tower and the feed inlet of the refining tower.

3. The continuous distillation device for fluorobenzene according to claim 1, wherein The light component outlet located at the upper part of the light component removal tower body is connected to the light component collection device; wherein, the top outlet of the light component removal tower is connected to the first condenser, and after condensation treatment, the outlet end of the first condenser is connected to the light component collection device through a light component conveying pipeline.

4. The continuous distillation device for fluorobenzene according to claim 3, wherein: A light component removal tower reflux tank is installed on the light component conveying pipeline, wherein the outlet of the light component removal tower reflux tank is connected to the light component collecting device for conveying via a light component removal tower reflux pump.

5. The continuous distillation device for fluorobenzene according to claim 1, wherein: The bottom discharge end of the light-removing tower is connected to the feed inlet of the refining tower through a bottom pump of the light-removing tower.

6. The continuous distillation device for fluorobenzene according to claim 1, characterized in that: The top outlet of the refining tower is connected to the second condenser, and after condensation treatment, the outlet end of the second condenser is connected to the fluorobenzene product tank through a fluorobenzene refining recovery pipeline.

7. The continuous distillation device for fluorobenzene according to claim 6, characterized in that: A refining tower reflux tank is installed on the fluorobenzene refining recovery pipeline, wherein the outlet of the refining tower reflux tank is connected to the fluorobenzene product tank for transportation via a refining tower reflux pump.

8. The continuous distillation device for fluorobenzene according to claim 1, characterized in that: The lightness removal tower and the refining tower both adopt plate-type packed towers.

9. The continuous distillation device for fluorobenzene according to claim 1, characterized in that: The fluorobenzene product tank transports the fluorobenzene product to the fluorobenzene tank area of ​​the production line through a product delivery pump.

10. The continuous distillation device for fluorobenzene according to claim 1, characterized in that: A refining tower loop is provided between the bottom of the refining tower and the kettle; wherein, a refining tower recovery pump is provided on the refining tower loop; and the bottom outlet of the refining tower transports the heavy component to the light component collection device through the refining tower bottom pump.

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