Visual tar removal rectifying tower

Abstract

The utility model discloses a visual tar removal rectifying tower, which relates to the technical field of rectifying towers, and comprises a rectifying tower main body, the rectifying tower main body is connected with a first condenser through a pipeline, the bottom of the rectifying tower main body is connected with a reboiler through a liquid phase pipe, the reboiler is connected with the rectifying tower main body through a reboiler gas phase pipe, and the rectifying tower main body is connected with a second condenser through a pipeline. A first observation sight glass is arranged on the liquid phase pipe; the reboiler is connected with a distillation retort through a pipeline, a distillation gas phase pipeline and a vacuum pipeline are arranged on the distillation retort, the distillation gas phase pipeline is connected with a gas phase pipe of the reboiler, and a discharging pipeline is arranged at the bottom of the distillation retort; the first condenser is connected with the reflux tank through a pipeline, a second observation sight glass is arranged between the first condenser and the reflux tank, and the reflux tank is connected with the rectifying tower main body through a reflux pipeline; a condensation assembly is arranged at the upper end of the rectifying tower body. The tar content can be judged by observing the color of a material through the sight glass, and the product quality can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to rectifying tower technical field especially relates to a visual tar removal rectifying tower. BACKGROUND

[0002] The negative pressure rectifying tower is a type of evaporator, and is characterized in that the rectifying tower is a tower type vapor-liquid contact device for rectification, and utilizes the different volatility of components in a mixture, i.e., the different vapor pressures of the components at the same temperature, to transfer the light components in the liquid phase to the gas phase, and transfer the heavy components in the gas phase to the liquid phase, so as to achieve the purpose of separation. The rectifying tower is also a mass transfer and heat transfer device widely used in petroleum and chemical production.

[0003] However, there are often tar or residue in the rectifying tower, which is difficult to separate due to high temperature, and affects the product quality. Most ordinary rectifying towers in the prior art cannot directly and effectively process the tar. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a visual tar removal rectifying tower to solve the problem that the ordinary rectifying tower cannot directly and effectively process the tar mentioned in the background.

[0005] The utility model adopts the following technical scheme:

[0006] The utility model relates to a visual tar removal rectifying tower, which comprises a rectifying tower main body, a first condenser connected to the rectifying tower main body through a condenser pipeline, a reboiler connected to the bottom of the rectifying tower main body through a liquid phase pipeline, a reboiler gas phase pipeline arranged on the reboiler, the reboiler gas phase pipeline connected to the lower side wall of the rectifying tower main body, and a first observation sight glass arranged on the liquid phase pipeline.

[0007] The reboiler is connected to a distillation tank through a discharge pipeline, the distillation tank is provided with a distillation gas phase pipeline and a vacuum pipeline, the distillation gas phase pipeline is connected to the reboiler gas phase pipeline, and the bottom of the distillation tank is provided with a discharge pipeline.

[0008] The first condenser is connected to a reflux tank through a condenser discharge pipeline, the condenser discharge pipeline is provided with a second observation sight glass, the reflux tank is connected to the side wall of the rectifying tower main body through a reflux pipeline, and the reflux pipeline is provided with a reflux pump. The upper end of the rectifying tower main body is provided with a condensing assembly.

[0009] Further, the condensing assembly comprises a second condenser arranged at the upper end of the rectifying tower main body, a water inlet of a water storage tank connected to the second condenser through a pipeline, a water outlet of the water storage tank connected to the second condenser through a hot water reflux pipeline, and a circulating pump arranged on the hot water reflux pipeline.

[0010] Further, the feeding pipeline is a sleeve pipeline, and the feeding pipeline is provided with a first delayed feeding valve and a second delayed feeding valve.

[0011] Still further, the condenser pipeline is a stainless steel DN250 pipeline, the reboiler gas phase pipeline is a stainless steel DN400 pipeline, the liquid phase pipeline is a stainless steel DN350 pipeline, the feeding pipeline is a stainless steel DN50 pipeline, the distillation gas phase pipeline is a stainless steel DN65 pipeline, the vacuum pipeline is a stainless steel DN25 pipeline, and the discharge pipeline is a stainless steel DN32 pipeline.

[0012] Compared with the prior art, the beneficial technical effects of the utility model are:

[0013] The utility model can judge tar content by observing material color through the first observation sight glass and the second observation sight glass, and is favorable for guaranteeing product quality. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be further described in connection with the drawings.

[0015] Figure 1 It is visual tar removal rectifying tower structure schematic diagram for the utility model;

[0016] The drawings are explained as follows: 1, rectifying tower main body;2, first condenser;201, condenser pipeline;202, condenser discharge pipeline;3, reboiler;301, reboiler gas phase pipeline;302, liquid phase pipeline;4, feeding pipeline;401, first delayed feeding valve;402, second delayed feeding valve;5, distillation tank;501, distillation gas phase pipeline;502, vacuum pipeline;503, feeding pipeline;6, first observation sight glass;7, reflux tank;701, reflux pipeline;702, reflux pump;8, condensing assembly;801, second condenser;802, water storage tank;803, circulating pump;804, hot water reflux pipe;9, second observation sight glass. DETAILED DESCRIPTION

[0017] In order to make the technical problem, technical scheme and beneficial effects of the utility model to be solved more clearly, the utility model is further described in detail in connection with the drawings and examples.

[0018] As Figure 1As shown, the embodiment discloses a visible tar removal rectification tower, which comprises a rectification tower body 1, the rectification tower body 1 is connected with a first condenser 2 through a condenser pipeline 201 by using flanges and bolts, the rectification tower body 1 is short-circuited through a kettle bottom flange at the bottom and connected with a reboiler 3 through a liquid phase pipeline 302, the reboiler 3 is provided with a reboiler gas phase pipeline 301, the reboiler gas phase pipeline 301 is connected with a lower sidewall of the rectification tower body 1, and the liquid phase pipeline 302 is provided with a first observation sight glass 6.

[0019] The reboiler 3 is connected with a distillation tank 5 through a discharge pipeline 4 by using flanges and bolts, the distillation tank 5 is provided with a distillation gas phase pipeline 501 and a vacuum pipeline 502, the vacuum pipeline 502 is connected with an external vacuum pump. The distillation gas phase pipeline 501 is connected with the reboiler gas phase pipeline 301, and the distillation tank 5 is provided with a discharge pipeline 503 at the bottom.

[0020] The distillation tank 5 utilizes the property that each component in the mixture has different volatility, that is, the vapor pressure of each component is different at the same temperature, so that the light component (low-boiling substance) in the liquid phase is transferred to the gas phase, and the heavy component (high-boiling substance) in the gas phase is transferred to the liquid phase, thereby achieving the purpose of separation. Distillation is due to the difference in boiling points of two different materials, and under the same vacuum and temperature, the light component is changed from liquid to gaseous material, and the heavy phase is left at the bottom of the tank. The kettle of the rectification tower body 1 contains a liquid phase of a mixture of tricyanopyridine and tar, which enters the distillation tank 5 through the discharge pipeline 4, the first delay discharge valve 401 and the second delay discharge valve 402 to separate the tar. In this section of the tricyanopyridine process, all heavy phases remaining are tar.

[0021] After the material enters the distillation tank 5, the vacuum pipeline 502 is opened to generate negative pressure in the distillation tank 5, which lowers the boiling point of the material under negative pressure, and then the distillation tank 5 is heated. Due to high temperature and high vacuum, instantaneous flashing occurs and tar is left. The tar is discharged from the discharge pipeline 503, and the material gas produced after flashing is returned to the reboiler gas phase pipeline 301 through the distillation gas phase pipeline 501 and then returned to the rectification tower body 1. The vacuum pipeline 502 adjusts the vacuum degree of the distillation tank 5 and the rectification tower body 1 to be the same. When the vacuum degrees of the distillation tank 5 and the rectification tower body 1 are the same, the material in the rectification tower body 1 can be normally discharged into the distillation tank 5.

[0022] In this embodiment, the material in the pipeline is crystallized below 58℃, so the discharge pipeline 4 adopts a double-pipe structure to keep the material warm. The first and second delay discharge valves 401 and 402 are provided on the discharge pipeline 4 and are controlled by the external DCS control room. The two cut-off valves are connected in series on the DCS, which is to ensure the amount of material discharged to the distillation tank 5 and the evaporation amount of the distillation tank 5.

[0023] The first condenser 2 is connected to the reflux tank 7 through the condenser discharge pipeline 202 using flanges and bolts. The second observation mirror 9 is provided on the condenser discharge pipeline 202. The reflux tank 7 is connected to the side wall of the rectification tower body 1 through the reflux pipeline 701. The reflux pump 702 is provided on the reflux pipeline 701. 。

[0024] The first observation mirror 6 can be used to observe the color of the tricyanopyridine flowing from the rectification tower body 1 to the reboiler 3. The second observation mirror 9 is used to observe the color of the tricyanopyridine flowing from the first condenser 2 to the reflux tank 7. The colors are transparent, light brown or red, respectively. The tar content is 0.32%, 1.7% and 5% respectively by chromatographic examination. In order to ensure product quality, the first and second observation mirrors 6 and 9 are the focus of the operator's inspection. The color in the observation mirror should be transparent during inspection.

[0025] The upper end of the rectification tower body 1 is provided with a condensing assembly 8. The condensing assembly 8 includes a second condenser 801. The second condenser 801 is provided at the upper end of the rectification tower body 1. The second condenser 801 is connected to the water inlet of a water storage tank 802 through a pipeline. The water outlet of the water storage tank 802 is connected to the second condenser 801 through a hot water reflux pipeline 804. A circulating pump 803 is provided on the hot water reflux pipeline 804. The hot water in the water storage tank 802 enters the second condenser 801 through the circulating pump 802 and the hot water reflux pipeline 804. The exchanged hot water returns to the second condenser 801 through a pipeline again.

[0026] The second condenser 801 cools the top of the rectification tower body 1. The high-temperature water after heat exchange enters the water storage tank 802 through the hot water reflux pipeline 804 for storage and heat dissipation. The low-temperature water after cooling returns to the second condenser 801 through the circulating pump 803 to cool the top of the rectification tower body 1 again.

[0027] In the embodiment, the condenser pipeline 201 adopts a stainless steel DN250 pipeline, the reboiler gas phase pipeline 301 adopts a stainless steel DN400 pipeline, the liquid phase pipeline 302 adopts a stainless steel DN350 pipeline, the discharge pipeline 4 adopts a stainless steel DN50 pipeline, the distillation gas phase pipeline 501 adopts a stainless steel DN65 pipeline, the vacuum pipeline 502 adopts a stainless steel DN25 pipeline, and the discharge pipeline 503 adopts a stainless steel DN32 pipeline.

[0028] The working principle of the utility model is as follows:

[0029] When the device is used, first, the vacuum pipeline 502 connected with the external vacuum pump is opened, the vacuum of the rectifying tower main body 1 and the distillation tank 5 is ensured to be consistent by means of the distillation gas phase pipeline 501, and the first delay discharge valve 401 and the second delay discharge valve 402 are automatically set by means of the external DCS control room. The material will pass through the discharge pipeline 4 to the first delay discharge valve 401, at this time, the first delay discharge valve 401 is in a closed state, and the second delay discharge valve 402 is in an open state. After reaching the set time, the first delay discharge valve 401 is in an open state, and the second delay discharge valve 402 is in a closed state, and the two are reciprocated in turn. The heavy component material will enter the high-temperature and high-vacuum distillation tank 5 intermittently and quantitatively, the material gas generated by flashing will return to the rectifying tower main body 1 through the distillation gas phase pipeline 501, and the tar will remain in the distillation tank 5. The tar in the distillation tank 5 is discharged periodically and regularly through the discharge pipeline 503. The content of the tar in the rectifying tower main body 1 can be judged by observing the color of the material through the first observation mirror 6. The material (tricyanopyridine) presents transparent, light brown and red respectively, which represents the tar content of 0.32%, 1.7% and 5% respectively. The tar of the finished product can be judged by observing the color of the material (tricyanopyridine) between the first condenser 2 and the reflux tank 7 through the second observation mirror 9, so as to ensure that the color of the material is always transparent liquid.

[0030] The above-described embodiments are only used to describe the preferred modes of the utility model, and do not limit the scope of the utility model, and various deformations and improvements of the technical solutions of the utility model made by those skilled in the art without departing from the design spirit of the utility model should fall within the protection scope determined by the claim book of the utility model.

Claims

1. A visual tar removal distillation column, comprising a distillation column body (1), characterized in that: The main body (1) of the distillation column is connected to the first condenser (2) through the condenser pipeline (201). The bottom of the main body (1) of the distillation column is connected to the reboiler (3) through the liquid phase pipe (302). The reboiler (3) is provided with a reboiler gas phase pipe (301). The reboiler gas phase pipe (301) is connected to the lower side wall of the main body (1) of the distillation column. The liquid phase pipe (302) is provided with a first observation mirror (6). The reboiler (3) is connected to the distillation tank (5) via a discharge pipeline (4). The distillation tank (5) is equipped with a distillation vapor pipeline (501) and a vacuum pipeline (502). The distillation vapor pipeline (501) is connected to the reboiler vapor pipeline (301). The bottom of the distillation tank (5) is equipped with a discharge pipeline (503). The first condenser (2) is connected to the reflux tank (7) through the condenser discharge pipeline (202). A second observation mirror (9) is provided on the condenser discharge pipeline (202). The reflux tank (7) is connected to the side wall of the distillation column body (1) through the reflux pipeline (701). A reflux pump (702) is provided on the reflux pipeline (701). A condenser assembly (8) is provided at the upper end of the main body (1) of the distillation column.

2. The visual tar removal distillation column according to claim 1, characterized in that: The condensation assembly (8) includes a second condenser (801), which is located at the upper end of the main body (1) of the distillation column. The second condenser (801) is connected to the inlet of the water storage tank (802) through a pipeline. The outlet of the water storage tank (802) is connected to the second condenser (801) through a hot water return pipe (804). A circulation pump (803) is installed on the hot water return pipe (804).

3. The visual tar removal distillation column according to claim 1, characterized in that: The discharge pipeline (4) is a sleeve pipeline, and a first delayed discharge valve (401) and a second delayed discharge valve (402) are provided on the discharge pipeline (4).

4. The visual tar removal distillation column according to claim 1, characterized in that: The condenser pipeline (201) is made of stainless steel DN250 pipeline; The reboiler gas phase pipe (301) is made of stainless steel DN400 pipeline, and the liquid phase pipe (302) is made of stainless steel DN350 pipeline. The discharge pipeline (4) is made of stainless steel DN50 pipeline; The distillation vapor pipeline (501) is made of stainless steel DN65, the vacuum pipeline (502) is made of stainless steel DN25, and the discharge pipeline (503) is made of stainless steel DN32.

Images