Direct feeding device for coking gasoline and diesel oil

Abstract

The utility model relates to the technical field of coking gasoline and diesel oil feeding, in particular to a direct feeding device for coking gasoline and diesel oil. The device comprises a gasoline discharge pipeline, a diesel discharge pipeline, a gasoline and diesel direct supply pipe, a first overline and a second overline, the feed end of the gasoline and diesel direct supply pipe is communicated with the diesel discharge pipeline, the discharge end of the gasoline and diesel direct supply pipe is connected with a coking gasoline and diesel modification device, the feed end of the first overline is connected with the gasoline discharge pipeline, and the discharge end of the second overline is connected with the gasoline discharge pipeline. The first overline discharging end is connected with the gasoline and diesel oil direct supply pipe, the second overline feeding end is connected with the gasoline and diesel oil direct supply pipe, and the second overline discharging end is connected with the coking gasoline and diesel oil modification device. According to the utility model, the VOC (Volatile Organic Compounds) index and the feeding heat loss of a tank area are reduced, and meanwhile, the device is suitable for being transformed on the basis of the existing pipeline arrangement, and the pipeline arrangement difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coking gasoline and diesel fuel feeding, in particular to a direct feeding device for coking gasoline and diesel fuel. Background Art

[0002] Coking gasoline and diesel are important products in the delayed coking process. However, due to their relatively poor quality, such as low octane number, high sulfur content and olefin content in coking gasoline, and poor stability. Coking diesel may also contain high levels of sulfur, nitrogen and other impurities, and the direct use effect is not good. Therefore, it is necessary to carry out upgrading treatment on these products to meet higher use standards. There are various methods for upgrading coking gasoline and diesel, which is one of the important links in the refining industry. However, the main goal is to remove the bad components in the products through chemical reactions such as hydrofining, and significantly improve the quality and use value of the products.

[0003] In the coking gasoline and diesel upgrading project, the gasoline and diesel produced in the delayed coking process are fed into the coking gasoline and diesel upgrading device through the feeding pipeline for upgrading treatment. In the prior art, the feeding of coking gasoline and diesel is a relatively key link, and coking gasoline and diesel with stable sources and controllable flow rates should be selected as raw materials for feeding.

[0004] In the prior art, in order to stabilize the feeding of coking gasoline and diesel, a tank farm is provided on the feeding pipeline of coking gasoline and diesel for temporarily storing coking gasoline and diesel. The tank farm acts as a buffer tank. The coking gasoline and diesel in the tank farm are fed into the coking gasoline and diesel upgrading device at a stable flow rate to achieve the indirect feeding of coking gasoline and diesel. Its technical defects are as follows:

[0005] (1) At least two storage tanks are occupied in the tank farm. Gasoline and diesel are both volatile gases, and the volatilized harmful organic substances cause the VOC on the site of the tank farm to exceed the standard.

[0006] (2) Since the coking gasoline and diesel produced cannot be directly fed into the coking gasoline and diesel upgrading device, the consumption of the self - carried heat during storage in the tank farm causes energy loss.

[0007] (3) Limited by the spatial layout of the coking area and the upgrading area during actual production, the difficulty of pipeline layout is increased. Summary of the Utility Model

[0008] Aiming at the technical problems such as excessive VOC, energy loss and large pipeline layout difficulty caused by the indirect feeding of coking gasoline and diesel upgrading, the utility model provides a direct feeding device for coking gasoline and diesel, which reduces the VOC index and feeding heat loss in the tank farm, and is suitable for transformation on the basis of the existing pipeline layout, reducing the difficulty of pipeline layout.

[0009] The utility model provides a coking gasoline and diesel direct feeding device, which includes a gasoline outlet pipeline and a diesel outlet pipeline. The outlet ends of the gasoline outlet pipeline and the diesel outlet pipeline are respectively connected to a gasoline storage tank and a diesel storage tank in the tank area. The outlet ends of the gasoline storage tank and the diesel storage tank are respectively connected to the inlet ends of a gasoline supply pipe and a diesel supply pipe. After the outlet ends of the gasoline supply pipe and the diesel supply pipe are combined, they are connected to a coking gasoline and diesel upgrading device. The device also includes a gasoline and diesel direct supply pipe, a first cross line, and a second cross line. The inlet end of the gasoline and diesel direct supply pipe is communicated with the diesel outlet pipeline, and the outlet end of the gasoline and diesel direct supply pipe is connected to the coking gasoline and diesel upgrading device. The inlet end of the first cross line is connected to the gasoline outlet pipeline. The connection position of the first cross line and the gasoline outlet pipeline is located near the inlet of the gasoline outlet pipeline. The outlet end of the first cross line is connected to the gasoline and diesel direct supply pipe. The inlet end of the second cross line is connected to the gasoline and diesel direct supply pipe, and the outlet end of the second cross line is connected to the coking gasoline and diesel upgrading device. The direction from the connection position of the first cross line and the gasoline and diesel direct supply pipe to the connection position of the second cross line and the gasoline and diesel direct supply pipe is the same as the material flow direction in the gasoline and diesel direct supply pipe.

[0010] Further, a first flow regulating valve and a first manual valve are provided on the gasoline outlet pipeline. Both the first flow regulating valve and the first manual valve are located between the connection position of the first cross line and the gasoline outlet pipeline and the gasoline storage tank.

[0011] Further, a second flow regulating valve and a second manual valve are provided on the diesel outlet pipeline. The second flow regulating valve and the second manual valve are distributed on both sides of the connection position of the gasoline and diesel direct supply pipe and the diesel outlet pipeline.

[0012] Further, a seventh manual valve is provided on the first cross line, and a fifth flow regulating valve is provided on the second cross line.

[0013] Further, a third manual valve, a fourth manual valve, a fifth manual valve, and a third flow regulating valve are provided on the gasoline and diesel direct supply pipe. The third manual valve is located between the connection position of the first cross line and the gasoline and diesel direct supply pipe and the inlet end of the gasoline and diesel direct supply pipe. The fourth manual valve and the fifth manual valve are distributed on both sides of the connection position of the second cross line and the gasoline and diesel direct supply pipe. The third flow regulating valve is located between the connection position of the second cross line and the gasoline and diesel direct supply pipe and the outlet end of the gasoline and diesel direct supply pipe.

[0014] Further, a sixth manual valve is provided on the gasoline supply pipe, and a fourth flow regulating valve is provided on the diesel supply pipe.

[0015] The beneficial effects of the utility model are as follows:

[0016] (1) The utility model can supply materials to the coking gasoline and diesel upgrading device in a direct feeding manner. Only a small part of the gasoline and diesel enters the tank area for storage, which plays a role in supplementing the flow by the stored materials in the tank area under the condition of insufficient flow, reduces the storage volume of gasoline and diesel in the tank area for loading and unloading, and then reduces the VOC content at the tank area site.

[0017] (2)The gasoline and diesel oil for coking loading and unloading of the present utility model can enter the coking gasoline and diesel oil upgrading device through the direct pipeline feeding method, solving the technical problem of heat loss caused by indirect feeding.

[0018] (3)The present utility model uses the method of sharing a direct gasoline and diesel oil supply pipe for the supply of gasoline and diesel oil, and can be retrofitted on the existing pipeline design, reducing the pipeline layout difficulty brought by the spatial layout of the coking area and the upgrading area. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of Embodiment 1 of the specific implementation manner of the present utility model.

[0021] In the figure, 1 - first flow regulating valve, 2 - first cross line, 3 - first manual valve, 4 - gasoline loading and unloading pipeline, 5 - diesel oil loading and unloading pipeline, 6 - second manual valve, 7 - seventh manual valve, 8 - direct gasoline and diesel oil supply pipe, 9 - fourth manual valve, 10 - fifth manual valve, 11 - second cross line, 12 - third flow regulating valve, 13 - second flow regulating valve, 14 - tank area, 15 - diesel oil supply pipe, 16 - gasoline supply pipe, 17 - sixth manual valve, 18 - third manual valve, 19 - fourth flow regulating valve, 20 - fifth flow regulating valve. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1

[0024] Combined with Figure 1, the present utility model provides a coking gasoline and diesel direct feeding device, which includes a gasoline outlet pipeline 4 and a diesel outlet pipeline 5 (located on the first-floor platform of the coking boundary area in the plant area). The outlet ends of the gasoline outlet pipeline 4 and the diesel outlet pipeline 5 are respectively connected to a gasoline storage tank and a diesel storage tank in the tank farm 14. The outlet ends of the gasoline storage tank and the diesel storage tank are respectively connected to the inlet ends of a gasoline supply pipe 16 and a diesel supply pipe 15. After the outlet ends of the gasoline supply pipe 16 and the diesel supply pipe 15 are combined, they are connected to a coking gasoline and diesel upgrading device (located on the second-floor platform of the upgrading boundary area). It also includes a gasoline and diesel direct supply pipe 8, a first cross line 2, and a second cross line 11. The inlet end of the gasoline and diesel direct supply pipe 8 is communicated with the diesel outlet pipeline 5, and the outlet end of the gasoline and diesel direct supply pipe 8 is connected to the coking gasoline and diesel upgrading device. The inlet end of the first cross line 2 is connected to the gasoline outlet pipeline 4. The connection position of the first cross line 2 and the gasoline outlet pipeline 4 is located near the inlet of the gasoline outlet pipeline 4. The outlet end of the first cross line 2 is connected to the gasoline and diesel direct supply pipe 8. The inlet end of the second cross line 11 is connected to the gasoline and diesel direct supply pipe 8, and the outlet end of the second cross line 11 is connected to the coking gasoline and diesel upgrading device. The direction from the connection position of the first cross line 2 and the gasoline and diesel direct supply pipe 8 to the connection position of the second cross line 11 and the gasoline and diesel direct supply pipe 8 is the same as the flow direction of the material in the gasoline and diesel direct supply pipe 8.

[0025] A first flow regulating valve 1 and a first manual valve 3 are provided on the gasoline outlet pipeline 4. Both the first flow regulating valve 1 and the first manual valve 3 are located between the connection position of the first cross line 2 and the gasoline outlet pipeline 4 and the gasoline storage tank. A second flow regulating valve 13 and a second manual valve 6 are provided on the diesel outlet pipeline 5. The second flow regulating valve 13 and the second manual valve 6 are distributed on both sides of the connection position of the gasoline and diesel direct supply pipe 8 and the diesel outlet pipeline 5. A seventh manual valve 7 is provided on the first cross line 2, and a fifth flow regulating valve 20 is provided on the second cross line 11. A third manual valve 18, a fourth manual valve 9, a fifth manual valve 10, and a third flow regulating valve 12 are provided on the gasoline and diesel direct supply pipe 8. The third manual valve 18 is located between the connection position of the first cross line 2 and the gasoline and diesel direct supply pipe 8 and the inlet end of the gasoline and diesel direct supply pipe 8. The fourth manual valve 9 and the fifth manual valve 10 are distributed on both sides of the connection position of the second cross line 11 and the gasoline and diesel direct supply pipe 8. The third flow regulating valve 12 is located between the connection position of the second cross line 11 and the gasoline and diesel direct supply pipe 8 and the outlet end of the gasoline and diesel direct supply pipe 8. A sixth manual valve 17 is provided on the gasoline supply pipe 16, and a fourth flow regulating valve 19 is provided on the diesel supply pipe 15.

[0026] Using the coking gasoline and diesel direct feeding device in Embodiment 1, a coking gasoline and diesel direct feeding method is provided, including:

[0027] S1. Coker gasoline is introduced into the gasoline filling pipeline 4. At this time, the flowmeter shows that the flow rate of coker gasoline is 50 t / h, which is greater than the first threshold of 40 t / h. Control to open the first hand valve 3, the seventh hand valve 7, the fourth hand valve 9, and the fifth hand valve 10, and close the other valves. Adjust the first flow regulating valve 1 to share the flow rate entering the gasoline filling pipeline 4; the coker gasoline enters the gasoline and diesel direct supply pipe 8, and adjust the third flow regulating valve 12 to make the flow rate of coker gasoline in the gasoline and diesel direct supply pipe 8 stably enter the coker gasoline and diesel upgrading device; a small amount of remaining coker gasoline in the gasoline filling pipeline 4 enters the gasoline storage tank in the tank area 14 through the first hand valve 3 for storage.

[0028] S2. After the tar gasoline feeding is completed, the gasoline and diesel direct supply pipe 8 is flushed. After flushing, the waste oil is discharged through the discharge port. After flushing, coker diesel is introduced into the diesel filling pipeline 5. The flow rate of coker diesel is 40 t / h, which is greater than the second threshold of 30 t / h. Close the first hand valve 3, the seventh hand valve 7, the first flow regulating valve 1, and the third flow regulating valve 12, open the second hand valve 6 and the third hand valve 18, and adjust the second flow regulating valve 13 to share the flow rate entering the diesel filling pipeline 5; the coker diesel enters the gasoline and diesel direct supply pipe 8, and adjust the fifth flow regulating valve 20 to make the flow rate of coker diesel in the gasoline and diesel direct supply pipe 8 stably enter the coker gasoline and diesel upgrading device; a small amount of remaining coker diesel in the diesel filling pipeline 5 enters the diesel storage tank in the tank area 14 through the second hand valve 6 for storage.

[0029] Example 2

[0030] The difference between Example 2 and Example 1 is that in step S1 of the coker gasoline and diesel direct feeding method, the flow rate of coker gasoline is 30 t / h, which is less than the first threshold of 40 t / h. At this time, control to open the sixth hand valve 17, and the coker gasoline stored in the tank area 14 enters the gasoline supply pipe 16 and merges with the tar gasoline in the gasoline and diesel direct supply pipe 8, and the flow rate value stably reaches the process requirement value, solving the technical problem of unstable flow rate value of coker gasoline feeding.

[0031] Although the present invention has been described in detail by referring to the drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all be within the scope of the present invention. / Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A coking gasoline and diesel direct supply device, comprising a gasoline outlet pipeline and a diesel outlet pipeline, characterized in that, The discharge ends of the gasoline discharge pipeline and the diesel discharge pipeline are respectively connected to the gasoline storage tank and the diesel storage tank in the tank farm. The discharge ends of the gasoline storage tank and the diesel storage tank are respectively connected to the inlet ends of the gasoline supply pipe and the diesel supply pipe. After the discharge ends of the gasoline supply pipe and the diesel supply pipe are combined, they are connected to the coking gasoline and diesel upgrading device. It also includes a gasoline and diesel direct supply pipe, a first cross-line, and a second cross-line. The inlet end of the gasoline and diesel direct supply pipe is connected to the diesel discharge pipeline, and the discharge end of the gasoline and diesel direct supply pipe is connected to the coking gasoline and diesel upgrading device. The inlet end of the first cross-line is connected to the gasoline discharge pipeline. The connection point between the first cross-line and the gasoline discharge pipeline is located near the inlet of the gasoline discharge pipeline. The discharge end of the first cross-line is connected to the gasoline and diesel direct supply pipe. The inlet end of the second cross-line is connected to the gasoline and diesel direct supply pipe, and the discharge end of the second cross-line is connected to the coking gasoline and diesel upgrading device. The direction from the connection point between the first cross-line and the gasoline and diesel direct supply pipe to the connection point between the second cross-line and the gasoline and diesel direct supply pipe is the same as the flow direction of the material in the gasoline and diesel direct supply pipe.

2. The coking gasoline and diesel direct supply device according to claim 1, characterized in that, A first flow regulating valve and a first manual valve are provided on the gasoline discharge pipeline. Both the first flow regulating valve and the first manual valve are located between the connection point of the first cross-line and the gasoline discharge pipeline and the gasoline storage tank.

3. The coking gasoline and diesel direct feeding device according to claim 1, characterized in that, A second flow regulating valve and a second manual valve are provided on the diesel discharge pipeline. The second flow regulating valve and the second manual valve are distributed on both sides of the connection point between the gasoline and diesel direct supply pipe and the diesel discharge pipeline.

4. A coking gasoline and diesel direct feeding device according to claim 1, characterized in that, A seventh manual valve is provided on the first cross-line, and a fifth flow regulating valve is provided on the second cross-line.

5. A coking gasoline and diesel direct feeding device according to claim 1, characterized in that, A third manual valve, a fourth manual valve, a fifth manual valve, and a third flow regulating valve are provided on the gasoline and diesel direct supply pipe. The third manual valve is located between the connection point of the first cross-line and the gasoline and diesel direct supply pipe and the inlet end of the gasoline and diesel direct supply pipe. The fourth manual valve and the fifth manual valve are distributed on both sides of the connection point between the second cross-line and the gasoline and diesel direct supply pipe. The third flow regulating valve is located between the connection point of the second cross-line and the gasoline and diesel direct supply pipe and the discharge end of the gasoline and diesel direct supply pipe.

6. The coking gasoline and diesel direct feeding device according to claim 1, characterized in that, A sixth manual valve is provided on the gasoline supply pipe, and a fourth flow regulating valve is provided on the diesel supply pipe.

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