Conveying device for distillation of TMP (trimethylolpropane) raw oil

Abstract

The utility model discloses a conveying device for distillation of TMP (trimethylolpropane) raw oil, which relates to the field of petroleum processing and comprises a feeding tank and a fractionating tower, a feeding pipeline is arranged in the middle of the feeding tank, and a heating device is mounted at the bottom of an inner cavity of the feeding tank; a gas pipe communicated with the middle of the fractionating tower is mounted at the top of the feeding tank, a pipeline communicated with the bottom of the fractionating tower is further mounted at the lower part of the feeding tank, and the bottommost part of the fractionating tower is not lower than the internal liquid level of the feeding tank; by arranging the feeding tank, raw materials are heated and gasified in the feeding tank, and the feeding tank is communicated with the fractionating tower through the gas pipe and the pipeline, so that liquid accumulated in the fractionating tower directly enters the material reducing tank to be heated; the use of other heating devices is avoided, and energy is saved.

Description

Technical Field

[0001] The utility model relates to the field of petroleum processing, in particular to a conveying device for TMP raw oil distillation. Background Art

[0002] Propylene (TMP) is a product produced by catalytic cracking of heavy oil. Its conventional sources are mainly naphtha steam cracking and catalytic cracking processes. Due to the shortcomings of steam cracking, such as high energy consumption, low propylene yield and insufficient raw material sources, the heavy oil catalytic cracking process to produce more low-carbon olefins has developed rapidly.

[0003] The existing distillation towers directly pass the oil and gas produced by heavy oil into the distillation tower for fractionation and cracking. In order to improve the production effect of propylene, hydrogen is introduced into the distillation tower. However, since the hydrogen and the raw gas are mixed in the distillation tower, the mixing effect is not good and the expected production effect cannot be achieved. Utility Model Content

[0004] The purpose of the utility model is to provide a conveying device for TMP crude oil distillation to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a conveying device for TMP crude oil distillation, comprising a feed tank and a fractionating tower, a feed pipeline is arranged in the middle of the feed tank, and a heating device is installed at the bottom of the inner cavity of the feed tank;

[0006] The top of the feed tank is equipped with an air pipe connected to the middle of the fractionation tower, and the lower part of the feed tank is also equipped with a pipeline connected to the bottom of the fractionation tower, and the bottom of the fractionation tower is not lower than the internal liquid level of the feed tank;

[0007] A hydrogenation pipeline is also installed on the upper side wall of the feed tank.

[0008] Preferably, the pipeline is further provided with an extension portion, and a reboiler is installed on the extension portion, and the gas outlet end of the reboiler is connected to the distillation tower.

[0009] Preferably, the bottom of the feed tank is connected to the bottom of the fractionation tower through a pipeline.

[0010] Preferably, the bottom of the fractionation tower is connected to the feed pipeline through a pipeline.

[0011] Preferably, an air filter plate is installed at the upper end of the inner cavity of the feed tank, and a plurality of evenly distributed air holes are opened on the air filter plate. An impeller is rotatably installed on the middle part of the bottom surface of the air filter plate through a rotating shaft, and the hydrogenation pipeline extends into the interior of the feed tank, and the air outlet is biased to one side of the impeller.

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

[0013] The utility model provides a feed tank so that the raw material is heated and gasified in the feed tank, and the feed tank is connected to the fractionating tower by two pipelines, namely an air pipe and a pipeline, so that the liquid accumulated in the fractionating tower directly enters the feed tank for heating, thus avoiding the use of other heating devices and saving energy. In addition, a hydrogenation pipeline is provided so that hydrogen can be mixed in the feed tank, and when entering the fractionating tower, the hydrogen and the raw material gas can be better mixed, thereby improving the production effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of another embodiment of the present invention;

[0016] Figure 3 This is a top view of the impeller and hydrogenation pipeline of this utility model.

[0017] In the figure: 1. feed tank; 2. distillation tower; 3. air filter plate; 4. impeller; 5. heating device; 6. feed pipeline; 7. pipeline; 8. valve; 9. reboiler; 10. hydrogenation pipeline. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1 The present embodiment provides a conveying device for TMP crude oil distillation, including a feed tank 1 and a distillation tower 2. A feed pipe 6 is provided in the middle of the feed tank 1, and the feed pipe 6 is used to feed the raw material into the feed tank 1. A heating device 5 is installed at the bottom of the inner cavity of the feed tank 1. The heating device 5 can heat the raw material entering the feed tank 1, so that the raw material in the feed tank 1 is heated and vaporized; the heating device 5 is preferably steam heated, and the heating device 5 is a steam pipe installed at the bottom of the inner cavity of the feed tank 1, and the steam pipe is arranged in an S shape, which can achieve better heating of the raw material.

[0020] A gas pipe connected to the middle of the fractionation tower 2 is installed on the top of the feed tank 1. The heated and vaporized gas can flow into the fractionation tower 2 from the gas pipe, and is cracked and separated into different products in the fractionation tower 2.

[0021] A pipeline 7 communicating with the bottom of the fractionation tower 2 is also installed at the lower part of the feed tank 1 .

[0022] The pipeline 7 connects the bottom of the feed tank 1 with the bottom of the fractionation tower 2, and the bottom of the fractionation tower 2 is not lower than the internal liquid level of the feed tank 1. After the gas is cooled in the fractionation tower 2, the heavier components will liquefy and gather at the bottom of the fractionation tower 2, and through the pipeline 7, the liquid at the bottom of the fractionation tower 2 will flow into the feed tank 1, and will be heated and vaporized again in the feed tank 1, and the generated gas will continue to enter the fractionation tower 2 for separation. The pipeline 7 is provided with a valve 8, that is, the valve 8 is installed on the pipeline between the feed tank 1 and the fractionation tower 2, and the opening and closing of the pipeline 7 can be controlled.

[0023] The pipeline 7 is also provided with an extension portion, and a reboiler 9 is installed on the extension portion. The gas outlet end of the reboiler 9 is connected to the distillation tower 2. A valve 8 is also installed on the pipeline 7, that is, the valve 8 is installed on the pipeline between the distillation tower 2 and the reboiler 9. The height of the reboiler 9 is lower than the bottom of the feed tank 1.

[0024] When the raw materials are heated in the feed tank 1 to be vaporized, some of the raw materials that are difficult to vaporize will be deposited at the bottom of the feed tank 1. The two valves 8 are opened to allow the deposited liquid to enter the reboiler 9 for reheating and vaporization, and the generated gas can directly enter the distillation tower 2.

[0025] When the liquid in the fractionation tower 2 needs to be heated, the valve 8 between the feed tank 1 and the fractionation tower 2 can be opened to allow the liquid in the fractionation tower 2 to enter the feed tank 1 for further heating. Alternatively, only the valve 8 between the fractionation tower 2 and the reboiler 9 can be opened to allow the liquid in the fractionation tower 2 to enter the reboiler 9 for heating and vaporization.

[0026] When both valves 8 are opened, the liquid in the feed tank 1 and the liquid in the distillation tower 2 can also directly enter the reboiler for heating and vaporization, and the raw material can also be vaporized when entering the feed tank 1. Therefore, when the two valves 8 are opened, two heated air flows enter the distillation tower 2, which can improve the efficiency of gas entry.

[0027] In a further embodiment, Figure 2 As shown, the bottom of the distillation tower 2 is connected to the feed pipe 6 through the pipe 7. Since the raw material liquid in the feed pipe 6 has a certain flow rate, it will form a certain suction force on the pipe 7. Moreover, since the pipe 7 is relatively long and the pressure inside it is relatively large, the raw material in the feed pipe 6 will not enter the pipe 7. However, due to the suction of the feed pipe 6, the liquid in the pipe 7 will follow the feed pipe 6 into the feed tank 1 for heating.

[0028] Similarly, in this embodiment, a valve 8 is installed on the pipe 7 installed between the feed tank 1 and the fractionation tower 2. The pipe 7 is also provided with an extension, and a reboiler 9 is installed on the extension. The gas outlet of the reboiler 9 is connected to the fractionation tower 2. A valve 8 is also installed on the pipe between the fractionation tower 2 and the reboiler 9. The height of the reboiler 9 is lower than the bottom of the feed tank 1. In this embodiment, the valve 8 between the feed tank 1 and the fractionation tower 2 is opened, and the liquid in the fractionation tower 2 can enter the feed tank 1 for heating and gasification when the other valve is closed. The valve 8 between the fractionation tower 2 and the reboiler 9 is opened, and the other valve is closed, and the liquid in the fractionation tower 2 enters the reboiler for heating and gasification. Only one of the two valves 8 can be opened.

[0029] A hydrogenation pipeline 10 is also installed on the upper side wall of the feed tank 1. The hydrogenation pipeline 10 can directly add hydrogen to the reduction tank 1, so that the hydrogen and the vaporized raw gas enter the knife distillation tank 2 together, so that the hydrogen and the raw gas are better mixed.

[0030] In order to achieve a better mixing effect of hydrogen in the feed tank 1, a gas filter plate 3 is installed at the upper end of the inner cavity of the feed tank 1. The gas filter plate 3 is provided with a plurality of evenly distributed pores, and the gas filter plate 3 is provided with at least one layer. The gas filter plate 3 has a heat-conducting effect, which can cool the gasified liquid, allowing the gas with heavier components to liquefy and settle, and fall to the bottom of the feed tank 1 for reheating. The gas with lighter components can pass through the pores into the air pipe and enter the fractionation tower 2.

[0031] like Figure 3 As shown, an impeller 4 is rotatably mounted on the middle part of the bottom surface of the air filter plate 3 through a rotating shaft, and a hydrogenation pipeline 10 extends into the interior of the feed tank 1, and the gas outlet is biased to one side of the impeller 4. Hydrogen flows out from the hydrogenation pipeline 10, and its power can drive the impeller 4 to rotate, thereby stirring the gas in the feed tank 1, so that the hydrogen and the raw gas are mixed more evenly.

[0032] Although 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. A conveying device for TMP crude oil distillation, comprising a feed tank (1) and a fractionating tower (2), characterized in that: A feed pipe (6) is provided in the middle of the feed tank (1), and a heating device (5) is installed at the bottom of the inner cavity of the feed tank (1); The top of the feed tank (1) is provided with an air pipe connected to the middle of the fractionation tower (2), and the bottom of the feed tank (1) is also provided with a pipeline (7) connected to the bottom of the fractionation tower (2), and the bottom of the fractionation tower (2) is not lower than the internal liquid level of the feed tank (1); A hydrogenation pipeline (10) is also installed on the upper side wall of the feed tank (1).

2. A conveying device for TMP crude oil distillation according to claim 1, characterized in that: The pipeline (7) is also provided with an extension portion, and a reboiler (9) is installed in the extension portion, and the gas outlet end of the reboiler (9) is connected to the distillation tower (2).

3. A conveying device for TMP crude oil distillation according to claim 2, characterized in that: The bottom of the feed tank (1) is connected to the bottom of the fractionation tower (2) via a pipeline (7).

4. A conveying device for TMP crude oil distillation according to claim 2, characterized in that: The bottom of the fractionation tower (2) is connected to the feed pipeline (6) via a pipeline (7).

5. The conveying device for TMP crude oil distillation according to claim 1, characterized in that: An air filter plate (3) is installed at the upper end of the inner cavity of the feed tank (1), and a plurality of evenly distributed air holes are opened on the air filter plate (3). An impeller (4) is rotatably installed in the middle of the bottom surface of the air filter plate (3) via a rotating shaft, and the hydrogenation pipeline (10) extends into the interior of the feed tank (1), and the air outlet is biased to one side of the impeller (4).

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