Distillation tower feeding device for coal tar processing

Abstract

The utility model relates to a fraction tower feeding device for coal tar processing, which comprises a fraction tower and a dehydrating tower, a first valve is arranged at an anhydrous tar feeding port on the fraction tower, one end of the first valve is provided with a feeding pipe for feeding anhydrous tar, a second valve is arranged below the first valve, and the dehydrating tower is arranged below the second valve. The second valve is mounted at a circulating asphalt feeding hole of the fraction tower, a circulating pipe for feeding circulating asphalt is mounted at one end of the second valve, an adding pipe is arranged between the feeding pipe and the circulating pipe, and two ends of the adding pipe are respectively communicated with the feeding pipe and the circulating pipe. By closing the first valve and the second valve and opening the third valve, the fed anhydrous tar and circulating asphalt are mixed, and then are fed through the mixing pipe and the third valve, so that the problem that the temperature of the anhydrous tar entering the fraction tower is low is effectively solved, triple-mixed anthracene oil components in the fraction tower can be better distilled, and the distillation efficiency is improved. Energy consumption in the production process is reduced, and long-period operation of a production system is facilitated.

Description

Technical Field

[0001] The utility model relates to a coal tar processing technology, in particular to a fraction tower feeding device for coal tar processing. Background Art

[0002] At present, in the coal tar processing industry, the raw tar is dehydrated through a dehydration tower and then fed to the distillation tower through an extraction pump. The temperature at the bottom of the dehydration tower is 230℃-255℃, and the temperature after heat exchange in the heat exchanger is 260℃-285℃. When it enters the lower part of the distillation tower at this temperature, it affects the distillation of the anthracene oil component in the distillation tower, which will cause the asphalt softening point to be low. In order to increase the asphalt softening point, the temperature at the bottom of the distillation tower needs to be increased, which will cause increased energy consumption in the production process and a high dry point of the three-mixed oil (phenol oil, industrial naphthalene, and wash oil) at the top of the distillation tower, affecting the quality of subsequent products. Utility Model Content

[0003] The purpose of the utility model is to provide a distillation tower feeding device for coal tar processing, which is used to solve the problem that the feed temperature of the existing coal tar processing distillation tower is low, resulting in increased energy consumption in the production process and a high three-mix dry point affecting the quality of subsequent products.

[0004] In order to solve the above problems, the utility model provides a distillation tower feeding device for coal tar processing, including a distillation tower and a dehydration tower, a first valve is provided at the anhydrous tar feed port on the distillation tower, a feed pipe for anhydrous tar feeding is installed at one end of the first valve, a second valve is provided below the first valve, the second valve is installed at the circulating asphalt feed port of the distillation tower, a circulation pipe for circulating asphalt feeding is installed at one end of the second valve, an additional pipe is provided between the feed pipe and the circulation pipe, both ends of the additional pipe are connected with the feed pipe and the circulation pipe respectively, a third valve is fixedly installed on the distillation tower, a mixing pipe is installed at one end of the third valve, and one end of the mixing pipe is fixedly connected with the additional pipe.

[0005] The coal tar processing fraction tower feeding device provided by the utility model also has the following technical features:

[0006] Furthermore, a fourth valve is installed on the installation pipe.

[0007] Furthermore, the discharge port of the dehydration tower is connected to a pump via a pipeline, the discharge port of the pump is connected to a heat exchanger via a pipeline, and the end of the feed pipe away from the first valve is connected to the discharge port of anhydrous tar of the heat exchanger.

[0008] Furthermore, the discharge port at the bottom of the distillation tower is connected to a circulation pump via a pipeline, the discharge port of the circulation pump is connected to a heat exchanger via a pipeline, the asphalt discharge port of the heat exchanger is connected to a tubular furnace via a pipeline, and the end of the circulation pipe away from the second valve is connected to the tubular furnace.

[0009] Furthermore, the third valve is located between the first valve and the second valve.

[0010] Furthermore, a plurality of discharge valves for extracting anthracene oil are provided at the top of the distillation tower.

[0011] The utility model has the following beneficial effects: by closing the first valve and the second valve and opening the third valve, the anhydrous tar and the circulating asphalt of the feed are mixed, and then fed through the mixing pipe and the third valve, not only the problem of low temperature of the anhydrous tar entering the distillation tower is effectively solved, but also the three mixed anthracene oil components in the distillation tower can be better distilled, which not only reduces the energy consumption in the production process, but also is more conducive to the long-term operation of the production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of an embodiment of the utility model;

[0013] Figure 2 This is a diagram of the feed structure of the distillation tower according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0014] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0015] like Figures 1 to 2 In the embodiment of the coal tar processing distillation tower feeding device of the utility model shown, the coal tar processing distillation tower feeding device comprises a distillation tower 1 and a dehydration tower 10, a first valve 2 is provided at the anhydrous tar feed port on the distillation tower 1, a feed pipe 3 for anhydrous tar feed is installed at one end of the first valve 2, a second valve 4 is provided below the first valve 2, the second valve 4 is installed at the circulating asphalt feed port of the distillation tower 1, a circulation pipe 5 for circulating asphalt feed is installed at one end of the second valve 4, an additional pipe 6 is provided between the feed pipe 3 and the circulation pipe 5, and the two ends of the additional pipe 6 are respectively connected to the feed port. The feed pipe 3 is connected to the circulation pipe 5, and a third valve 7 is fixedly installed on the distillation tower 1. A mixing pipe 8 is installed at one end of the third valve 7, and one end of the mixing pipe 8 is fixedly connected to the installation pipe 6. By closing the first valve 2 and the second valve 4 and opening the third valve 7, the fed anhydrous tar and the circulating asphalt are mixed, and then fed through the mixing pipe 8 and the third valve 7. This not only effectively solves the problem of low temperature of the anhydrous tar entering the distillation tower 1, but also enables the three mixed anthracene oil components in the distillation tower 1 to be better distilled, which not only reduces the energy consumption in the production process, but also is more conducive to the long-term operation of the production system.

[0016] In one embodiment of the present application, preferably, a fourth valve 9 is installed on the installation pipe 6. By setting the fourth valve 9, it is possible to control whether the anhydrous tar in the feed pipe 3 and the circulating asphalt in the circulation pipe 5 are mixed.

[0017] In one embodiment of the present application, preferably, the discharge port of the dehydration tower 10 is connected to an extraction pump 11 via a pipeline, and the discharge port of the extraction pump 11 is connected to a heat exchanger 12 via a pipeline. The end of the feed pipe 3 away from the first valve 2 is connected to the discharge port of the anhydrous tar of the heat exchanger 12. The anhydrous tar in the dehydration tower 10 can be extracted through the extraction pump 11 and heat exchanged through the heat exchanger 12. The anhydrous tar after heat exchange enters the feed pipe 3.

[0018] In one embodiment of the present application, preferably, the discharge port at the bottom of the distillation tower 1 is connected to a circulation pump 13 via a pipeline, the discharge port of the circulation pump 13 is connected to the heat exchanger 12 via a pipeline, the asphalt discharge port of the heat exchanger 12 is connected to a tubular furnace 14 via a pipeline, and the end of the circulation pipe 5 away from the second valve 4 is connected to the tubular furnace 14. The asphalt is extracted from the bottom of the distillation tower 1 through the circulation pump 13, and is heated by the heat exchanger 12 and the tubular furnace 14, and then enters the circulation pipe 5. The heat exchanger 12 is provided with two feed ports and two discharge ports, one of which is used for heat exchange of asphalt, and the other is used for heat exchange of anhydrous tar.

[0019] In one embodiment of the present application, preferably, the third valve 7 is located between the first valve 2 and the second valve 4, so that the third valve 7 is located above the second valve 4 for circulating asphalt feed. The third valve 7 can be used for circulating asphalt feed, and the circulating asphalt feed port of the distillation tower 1 is changed to the top of the tower, which is more conducive to the distillation of the three-mixed oil (and anthracene oil) in the distillation tower 1.

[0020] In one embodiment of the present application, preferably, a plurality of discharge valves for anthracene oil production are provided on the top of the distillation tower 1, and the plurality of discharge valves are used for anthracene oil production.

[0021] When the utility model is in use, the anhydrous tar in the dehydration tower 10 can be extracted by the extraction pump 11, and heat is exchanged through the heat exchanger 12. The anhydrous tar after heat exchange enters the feed pipe 3, and the asphalt is extracted from the bottom of the fractionation tower 1 by the circulation pump 13, and is heated by the heat exchanger 12 and the tubular furnace 14, and then enters the circulation pipe 5. The third valve 7 and the fourth valve 9 are closed, and the anhydrous tar and the circulating asphalt can be fed through the first valve 2 and the second valve 4 respectively. By closing the first valve 2 and the second valve 4 and opening the fourth valve 9 and the third valve 7, the feed pipe 3 and the circulation pipe 5 are connected. Pipe 6 is connected to the mixing pipe 8, so that the circulating asphalt and the anhydrous tar are mixed and fed together through the third valve 7. Since the circulating asphalt in the circulating pipe 5 has a high temperature (375℃-390℃) and the anhydrous tar in the feed pipe 3 has a low temperature (260℃-285℃), the circulating asphalt and the anhydrous tar can increase the temperature of the anhydrous tar to 340℃-370℃ after mixing. This avoids the problem that the low temperature of the anhydrous tar affects the distillation of components such as the three-mixed oil (phenol oil, industrial naphthalene, and wash oil) and anthracene oil, resulting in a low softening point of the asphalt. This not only reduces energy consumption in the production process, but also is more conducive to the long-term operation of the production system.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fractionation tower feeding device for coal tar processing, comprising a fractionation tower (1) and a dehydration tower (10), characterized in that: A first valve (2) is provided at the anhydrous tar feed port on the distillation tower (1), a feed pipe (3) for anhydrous tar feed is installed at one end of the first valve (2), a second valve (4) is provided below the first valve (2), the second valve (4) is installed at the circulating asphalt feed port of the distillation tower (1), a circulation pipe (5) for circulating asphalt feed is installed at one end of the second valve (4), an additional pipe (6) is provided between the feed pipe (3) and the circulation pipe (5), the two ends of the additional pipe (6) are respectively connected to the feed pipe (3) and the circulation pipe (5), a third valve (7) is fixedly installed on the distillation tower (1), a mixing pipe (8) is installed at one end of the third valve (7), and one end of the mixing pipe (8) is fixedly connected to the additional pipe (6).

2. The coal tar processing fractionation tower feeding device according to claim 1, characterized in that: A fourth valve (9) is installed on the installation pipe (6).

3. The coal tar processing fractionation tower feeding device according to claim 1, characterized in that: The discharge port of the dehydration tower (10) is connected to an extraction pump (11) via a pipeline, the discharge port of the extraction pump (11) is connected to a heat exchanger (12) via a pipeline, and the end of the feed pipe (3) away from the first valve (2) is connected to the discharge port of the anhydrous tar of the heat exchanger (12).

4. The coal tar processing fractionation tower feeding device according to claim 1, characterized in that: The discharge port at the bottom of the distillation tower (1) is connected to a circulation pump (13) via a pipeline, the discharge port of the circulation pump (13) is connected to a heat exchanger (12) via a pipeline, the asphalt discharge port of the heat exchanger (12) is connected to a tubular furnace (14) via a pipeline, and the end of the circulation pipe (5) away from the second valve (4) is connected to the tubular furnace (14).

5. The coal tar processing fractionation tower feeding device according to claim 1, characterized in that: The third valve (7) is located between the first valve (2) and the second valve (4).

6. The coal tar processing fractionation tower feeding device according to claim 1, characterized in that: The top of the distillation tower (1) is provided with a plurality of discharge valves for extracting anthracene oil.

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