Long-period operation equipment for reboiler of TEG tower

Abstract

The utility model discloses a long-period operation device for a TEG tower reboiler, which belongs to the field of chemical production equipment and is characterized in that an upper tube plate and a lower tube plate of the TEG rectifying tower reboiler are connected with an ultrasonic vibration instrument of the TEG rectifying tower reboiler, the TEG rectifying tower reboiler is communicated with a TEG rectifying tower, and the TEG rectifying tower reboiler is communicated with the TEG rectifying tower. A feeding pipeline of the TEG rectifying tower reboiler is controlled to be opened and closed through a fourth flow control valve; a flow dividing pipeline is connected between a TEG rectifying tower kettle filter and a fifth flow control valve of a feeding pipeline to be communicated with a TEG rectifying tower reboiler, and a second flow meter and a sixth flow control valve are arranged on the flow dividing pipeline, so that the technical problem of prolonging the long-period operation of the TEG rectifying tower reboiler is solved, and the device is mainly applied to the aspect of chemical production.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production equipment, and specifically relates to a TEG tower reboiler long-period operation device. Background Art

[0002] In the ethylene glycol unit, the TEG tower reboiler long-cycle operation equipment is a common equipment, which is used to ensure the stable operation of the TEG distillation tower, so as to ensure the long-term operation of the TEG tower and the continuous output of TEG products. The long-cycle operation of the TEG tower reduces the material consumption and energy loss of the ethylene glycol unit. Therefore, the longer the continuous operation time of the TEG tower, the better the economic benefits for the ethylene glycol unit.

[0003] The content of heavy components and unknown components in the kettle of the TEG distillation tower is relatively high, which requires regular cleaning of the reboiler of the TEG distillation tower. To this end, the operating temperature of the TEG distillation tower is adjusted to reduce the generation of heavy components and increase the external discharge volume of the kettle. However, after analysis and detection, it is found that this problem has not been solved and the operation time of the reboiler of the TEG distillation tower is still relatively short. In view of this phenomenon, the utility model provides a long-cycle operation device for the TEG tower reboiler of an ethylene glycol device to solve the problem of long-cycle operation of the TEG tower reboiler. Summary of the invention

[0004] Purpose of the invention: The purpose of the utility model is to provide a TEG tower reboiler long-cycle operation device to achieve the technical problem of increasing the long-cycle operation of the TEG tower reboiler.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a TEG tower reboiler long-cycle operation device, comprising:

[0006] A TEG distillation tower, wherein a distillation tower condenser is built in the top of the distillation tower, and the distillation tower condenser is connected to a vacuum system through a vacuum pipeline, so as to maintain the vacuum degree of the TEG distillation tower;

[0007] A TEG distillation tower extraction pump, wherein the inlet end of the TEG distillation tower extraction pump is connected to the middle and upper part of the TEG distillation tower through a suction pipeline, a first gate valve is arranged on the suction pipeline, and the outlet end thereof is connected to the middle and lower part of the TEG distillation tower through a reflux pipeline, a reflux filter, a first flow control valve and a first flow meter are arranged on the reflux pipeline;

[0008] TEG cooler, a branch line is led out from the reflux line to the TEG cooler, and the TEG cooler is sent to the intermediate tank through the second flow control valve on the finished product pipeline;

[0009] A TEG distillation tower kettle pump, wherein the inlet end of the TEG distillation tower kettle pump is connected to the TEG distillation tower, and the outlet end of the TEG distillation tower kettle pump goes to heavy alcohol through a feeding pipeline, and a TEG distillation tower kettle filter and a third flow control valve are arranged on the feeding pipeline;

[0010] A light component extraction pump, wherein the inlet end of the light component extraction pump is connected to the middle of the TEG distillation tower, and the outlet end of the light component extraction pump is connected to the unqualified tank;

[0011] The invention is characterized in that: the upper tube sheet and the lower tube sheet of the TEG distillation tower reboiler are connected to the ultrasonic vibrator of the TEG distillation tower reboiler, and the TEG distillation tower reboiler is connected to the TEG distillation tower, and the feed pipeline of the TEG distillation tower reboiler is controlled to be opened and closed by the fourth flow control valve;

[0012] A bypass line is connected between the TEG distillation tower kettle filter and the third flow control valve of the feed pipeline to communicate with the TEG distillation tower reboiler, and a second flow meter and a sixth flow control valve are arranged on the bypass line.

[0013] Furthermore: the TEG distillation tower is a vacuum distillation tower.

[0014] Furthermore: the TEG distillation tower reboiler is a falling film reboiler.

[0015] Furthermore: a third thermometer is installed on the TEG distillation tower, and the amount of the heavy alcohol delivered to the distillation tower is controlled by the third thermometer.

[0016] Furthermore: a liquid level meter is installed on the TEG distillation tower, and the fourth flow control valve is controlled by the liquid level meter to adjust the amount of steam added.

[0017] Compared with the prior art, the utility model has the following advantages: by connecting the upper tube plate and the lower tube plate of the TEG distillation tower reboiler with the ultrasonic vibrator of the TEG distillation tower reboiler, the ultrasonic vibration of the TEG distillation tower reboiler works continuously to reduce the accumulation of heavy components and the generation of unknown substances, thereby improving the long-term operation of the device and increasing the economic benefits of the device, and is suitable for comprehensive promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flow chart of the utility model. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] In the description of the invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the embodiment of the present utility model, Figure 1 As shown, a TEG tower reboiler long-cycle operation device comprises:

[0022] TEG distillation tower 1, in order to ensure the quality grade of TEG products, three sections of TEG distillation tower packing 5 are arranged in the TEG distillation tower 1, in order to reduce the pressure drop and avoid scaling, a distillation tower condenser 2 is built into the top of the distillation tower 1, in order to reduce the construction area of ​​the TEG distillation tower, steam usage, operating temperature and equipment and operation costs, and to reduce the coking of the heavy component reboiler and the generation of unknown substances to maintain the vacuum degree of the TEG distillation tower, the distillation tower condenser 2 is connected to the vacuum system through a vacuum pipeline;

[0023] A TEG distillation tower extraction pump 17, wherein the inlet end of the TEG distillation tower extraction pump 17 is connected to the middle and upper part of the TEG distillation tower 1 through a suction pipeline, and a first gate valve 6 is arranged on the suction pipeline. The TEG distillation tower extraction pump 17 extracts the TEG product in the TEG distillation tower 1 through the suction pipeline and refluxes into the TEG distillation tower 1 after passing through the reflux filter 13, the first flow control valve 7 and the first flow meter 8 on the reflux pipeline, and the outlet end thereof is connected to the middle and lower part of the TEG distillation tower 1 through a reflux pipeline, and a reflux filter 13, the first flow control valve 7 and the first flow meter 8 are arranged on the reflux pipeline, thereby ensuring the quality of the TEG product;

[0024] TEG cooler 18, a bypass pipeline is led out from the reflux pipeline to TEG cooler 18, TEG cooler 18 is sent to the intermediate tank through the second flow control valve 22 on the finished product pipeline, TEG distillation tower extraction pump 17 extracts TEG products in TEG distillation tower 1 through the suction pipeline and passes through the reflux filter 13, the first flow control valve 7 and the first flow meter 8 on the reflux pipeline before reflux into the inside of TEG distillation tower 1. During the process, some products enter TEG cooler 18 through the bypass pipeline, are cooled by circulating water, and the temperature is maintained at 30°C before being sent to the finished product intermediate tank;

[0025] A TEG distillation tower kettle pump 14, wherein the inlet end of the TEG distillation tower kettle pump 14 is connected to the TEG distillation tower 1, and the outlet end of the TEG distillation tower kettle pump 14 is sent to heavy alcohol through a feeding pipeline, and a TEG distillation tower kettle filter 15 and a third flow control valve 16 are arranged on the feeding pipeline;

[0026] A light component extraction pump 19, wherein the inlet end of the light component extraction pump 19 is connected to the middle of the TEG distillation tower 1, and the outlet end thereof is connected to the unqualified tank;

[0027] The invention is characterized in that: the upper tube sheet and the lower tube sheet of the TEG distillation tower reboiler 11 are connected to the TEG distillation tower reboiler ultrasonic vibrator 9, and the TEG distillation tower reboiler 11 is connected to the TEG distillation tower 1, the feed pipeline of the TEG distillation tower reboiler 11 is controlled to open and close by the fourth flow control valve 10, and the TEG distillation tower reboiler ultrasonic vibrator works continuously to ensure that the TEG tower reboiler can reduce the production of heavy component unknowns and coking products, so that the TEG can operate for a long period of time;

[0028] A split pipeline is connected between the TEG distillation tower kettle filter 15 and the third flow control valve 16 of the feed pipeline to communicate with the TEG distillation tower reboiler 11, and a second flow meter 23 and a sixth flow control valve 12 are arranged on the split pipeline;

[0029] The TEG distillation tower 1 is a vacuum distillation tower;

[0030] The TEG distillation tower reboiler 11 is a falling film reboiler;

[0031] A third thermometer 25 is installed on the TEG distillation tower 1, and the amount of the heavy alcohol delivered to the distillation tower 1 is controlled by the third thermometer 25;

[0032] A liquid level meter 24 is installed on the TEG distillation tower 1 , and the fourth flow control valve 10 is controlled by the liquid level meter 24 to adjust the amount of steam added.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A TEG tower reboiler long-cycle operation device, comprising: A TEG distillation tower (1), wherein a distillation tower condenser (2) is built in the top of the distillation tower (1), and the distillation tower condenser (2) is connected to a vacuum system via a vacuum pipeline, so as to maintain the vacuum degree of the TEG distillation tower; A TEG distillation tower extraction pump (17), wherein the inlet end of the TEG distillation tower extraction pump (17) is connected to the middle and upper part of the TEG distillation tower (1) through a suction pipeline, a first gate valve (6) is arranged on the suction pipeline, and the outlet end of the TEG distillation tower extraction pump (17) is connected to the middle and lower part of the TEG distillation tower (1) through a reflux pipeline, a reflux filter (13), a first flow control valve (7) and a first flow meter (8) are arranged on the reflux pipeline; A TEG cooler (18), a branch line is led out from the return line to the TEG cooler (18), and the TEG cooler (18) is sent to the intermediate tank through a second flow control valve (22) on the finished product line; A TEG distillation tower kettle pump (14), wherein the inlet end of the TEG distillation tower kettle pump (14) is connected to the TEG distillation tower (1), and the outlet end of the TEG distillation tower kettle pump (14) is sent to heavy alcohol through a feed pipeline, and a TEG distillation tower kettle filter (15) and a third flow control valve (16) are arranged on the feed pipeline; A light component extraction pump (19), wherein the inlet end of the light component extraction pump (19) is connected to the middle of the TEG distillation tower (1), and the outlet end of the light component extraction pump (19) is connected to the unqualified tank; The invention is characterized in that: the upper tube sheet and the lower tube sheet of the TEG distillation tower reboiler (11) are connected to the TEG distillation tower reboiler ultrasonic vibrator (9), and the TEG distillation tower reboiler (11) is connected to the TEG distillation tower (1), and the feed pipeline of the TEG distillation tower reboiler (11) is controlled to be opened and closed by a fourth flow control valve (10); A bypass pipeline is connected between the TEG distillation tower kettle filter (15) and the third flow control valve (16) of the feed pipeline to communicate with the TEG distillation tower reboiler (11), and a second flow meter (23) and a sixth flow control valve (12) are arranged on the bypass pipeline.

2. A TEG tower reboiler long-cycle operation device according to claim 1, characterized in that: The TEG distillation tower (1) is a vacuum distillation tower.

3. A TEG tower reboiler long-cycle operation device according to claim 1, characterized in that: The TEG distillation tower reboiler (11) is a falling film reboiler.

4. A TEG tower reboiler long-cycle operation device according to claim 1, characterized in that: A third thermometer (25) is installed on the TEG distillation tower (1), and the amount of the heavy alcohol delivered to the distillation tower is controlled by the third thermometer (25).

5. The TEG tower reboiler long-cycle operation equipment according to claim 1, characterized in that: A liquid level meter (24) is installed on the TEG distillation tower (1), and the fourth flow control valve (10) is controlled by the liquid level meter (24) to adjust the amount of steam added.

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