Regeneration lifting pipeline shutdown processing system

Abstract

The utility model relates to a regeneration lifting pipeline shutdown processing system which comprises a first pipeline and a nitrogen lifting pipeline connected to the upper portion of the first pipeline. The nitrogen lifting pipeline is connected with an external nitrogen / hydrogen lifting pipeline. A main gate valve is arranged at the root position, connected with the first pipeline, of the nitrogen lifting pipeline, two flange connecting valves are arranged at the front end of the main gate valve, a drain valve and a pressure gauge are arranged between the two flange connecting valves, and the pressure gauge monitors the pipeline pressure to prevent mutual channeling of hydrogen and nitrogen; a one-way valve is arranged at the position close to the flange connecting valve at the foremost end. According to the system, a valve, a pressure gauge and a guide shower are additionally arranged on a nitrogen lifting pipeline, an original nitrogen lifting isolation blind plate is detached and then isolated by the valve, and the pressure gauge monitors the pipeline pressure to prevent mutual channeling of hydrogen and nitrogen, so that the purpose of safe shutdown is achieved.

Description

Technical Field

[0001] The utility model relates to a safety measure for emergency shutdown of a reforming regeneration unit, in particular to a shutdown processing system for a regeneration lifting pipeline. Background Art

[0002] If there is a leak in the reforming regeneration lifting pipeline, the reforming needs to be shut down for processing. When shutting down, the blind plate of the nitrogen / hydrogen lifting pipeline must be removed immediately, and the hydrogen lifting should be changed to nitrogen lifting. If the blind plate is removed for too long, it is easy to cause hydrogen leakage, which poses a safety hazard. Utility Model Content

[0003] In view of the above-mentioned technical problems, the purpose of the utility model is to provide a regeneration lifting pipeline shutdown processing system.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a regeneration lifting pipeline shutdown processing system, comprising: a first pipeline, a nitrogen lifting pipeline connected to the top of the first pipeline, the nitrogen lifting pipeline is connected to an external nitrogen / hydrogen lifting pipeline; a main gate valve is arranged at the root position where the nitrogen lifting pipeline is connected to the first pipeline, two flange connection valves are arranged at the front end of the main gate valve, a drain valve and a pressure gauge are arranged between the two flange connection valves, and the pipeline pressure is monitored by the pressure gauge to prevent hydrogen and nitrogen from mutual crosstalk; a one-way valve is arranged at the flange connection valve position close to the front end.

[0005] Furthermore, the first pipeline is a pipeline for nitrogen boosting connected from the outlet of the nitrogen booster to the outside of the system;

[0006] Furthermore, the first pipeline is also connected to a regenerated nitrogen storage tank through a pipeline to store nitrogen, and can supply nitrogen for a short time when the compressor fails;

[0007] Furthermore, a pipeline is led out from the front end of the pipeline connected to the regenerated nitrogen storage tank and returns to the nitrogen booster;

[0008] Furthermore, the nitrogen lifting pipeline is also provided with a second pipeline connected to the pressure swing adsorption hydrogen purification device and located at the front end of the one-way valve; the pressure swing adsorption hydrogen purification device, the purity of this hydrogen is higher than that of PSA, and the purity of the reforming hydrogen is adjusted;

[0009] Furthermore, a third pipeline connected to the reformed hydrogen dechlorination tank is provided at the front end of the second pipeline, and a control valve group and a pilot valve are provided at the front end of the third pipeline; the reformed hydrogen dechlorination tank has a lower purity of hydrogen than the PSA purity, and the purity of the reformed hydrogen is adjusted;

[0010] Furthermore, a bypass pipeline is branched on the third pipeline and connected to the end of the nitrogen lifting pipeline, and a bypass valve is arranged on the bypass pipeline.

[0011] Furthermore, the second pipeline is provided with a first valve and a second valve in sequence from the air intake direction.

[0012] When a problem occurs in the above system, hydrogen boost is changed to nitrogen boost, and the two flange connection valves are opened at the same time; when the system is normally boosted by hydrogen, the two flange connection valves are closed at the same time.

[0013] Furthermore, the first valve and the second valve arranged on the second pipeline are hydrogen and nitrogen isolation valves, the purpose of which is to prevent nitrogen and hydrogen from mutual crosstalk when the process is not opened.

[0014] Furthermore, the specifications of the two flange connection valves are DN100 and PN5.0; the nitrogen lifting pipelines at the positions of the two flange connection valves are PN5.0;

[0015] Furthermore, the shower guide valve is arranged between the two flange connection valves, and a pressure gauge is arranged between the shower guide valve and the upper flange connection valve;

[0016] Furthermore, the pressure gauge has a range of 2.5 MPa;

[0017] Furthermore, the specification of the shower valve between the two flange connection valves is DN15, PN5.0;

[0018] The beneficial effects of the above structure of the utility model are:

[0019] New valves, pressure gauges and drainpipes are added to the nitrogen lifting pipeline. The original nitrogen lifting isolation blind plate is removed and isolated by valves. The pressure gauge monitors the pipeline pressure to prevent hydrogen and nitrogen from mixing with each other, thereby achieving the purpose of safe shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the regeneration lifting pipeline shutdown processing system of the utility model.

[0021] In the figure, 1, the first pipeline, 2, the nitrogen lifting pipeline, 3, the second pipeline, 4, the third pipeline, 5, the bypass pipeline, 6, the one-way valve, 7, the flange connection valve, 8, the shower valve, 9, the pressure gauge, 10, the bypass valve, 11, the first valve, 12, the second valve, 13, the main gate valve. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0023] like Figure 1 A regeneration lifting pipeline shutdown processing system shown in the figure includes: a first pipeline 1, a nitrogen lifting pipeline 2 connected to the top of the first pipeline 1, the nitrogen lifting pipeline 2 is connected to an external nitrogen / hydrogen lifting pipeline (2 / 3 / 4 lifting), and the 2 / 3 / 4 nitrogen / hydrogen lifting pipeline can be nitrogen or hydrogen; a main gate valve 13 is set at the root position where the nitrogen lifting pipeline 2 is connected to the first pipeline 1, and two flange connection valves 7 are set at the front end of the main gate valve 13, and a drain valve 8 and a pressure gauge 9 are set between the two flange connection valves 7. The pipeline pressure is monitored by the pressure gauge to prevent hydrogen and nitrogen from mutual crosstalk; a one-way valve 6 is set at the flange connection valve position close to the front end.

[0024] Furthermore, the first pipeline 1 is a pipeline for nitrogen boosting (1 / 5 boosting) connected from the outlet of the nitrogen booster to the outside of the system;

[0025] Furthermore, the first pipeline 1 is also connected to the regeneration nitrogen storage tank D307 through a pipeline, the purpose of which is to store nitrogen and to supply nitrogen for a short time when the compressor fails;

[0026] Furthermore, a pipeline is led out from the front end of the pipeline connected to the regenerated nitrogen storage tank D307 and returns to the nitrogen booster K301;

[0027] Furthermore, the nitrogen lifting pipeline 2 is also provided with a second pipeline 3 connected to the pressure swing adsorption hydrogen purification device and located at the front end of the one-way valve 6;

[0028] Furthermore, a third pipeline 4 connected to the reforming hydrogen dechlorination tank is provided at the front end of the second pipeline 3, and a control valve group and a shower valve are provided at the front end of the third pipeline 4;

[0029] The third pipeline 4 is also branched with a bypass pipeline 5 and connected to the end of the nitrogen lifting pipeline 2 . A bypass valve 10 is provided on the bypass pipeline 5 .

[0030] Furthermore, the second pipeline 3 is provided with a first valve 11 and a second valve 12 in sequence from the air intake direction.

[0031] When a problem occurs in the above system, hydrogen boost is changed to nitrogen boost, and the two flange connection valves 7 are opened at the same time; and when the system is normally boosted by hydrogen, the two flange connection valves 7 are closed at the same time.

[0032] Furthermore, the first valve 11 and the second valve 12 provided on the second pipeline 3 are hydrogen and nitrogen isolation valves, the purpose of which is to prevent nitrogen and hydrogen from mutually bridging when the process is not opened.

[0033] Furthermore, the specifications of the two flange connection valves 7 are DN100 and PN5.0; the nitrogen lifting pipelines at the positions of the two flange connection valves 7 are PN5.0;

[0034] Furthermore, the shower guide valve 8 is arranged between the two flange connection valves 7, and a pressure gauge 9 is arranged between the shower guide valve 8 and the upper flange connection valve 7;

[0035] Furthermore, the pressure gauge 9 has a range of 2.5 MPa;

[0036] Furthermore, the specification of the shower valve 8 between the two flange connection valves 7 is DN15, PN5.0.

[0037] The purpose of the utility model is to add a valve, a pressure gauge 9 and a drain 8 to the nitrogen lifting pipeline 2, remove the original nitrogen lifting isolation blind plate and isolate it with the valve, and the pressure gauge 9 monitors the pipeline pressure to prevent hydrogen and nitrogen from collided with each other, so as to achieve the purpose of safe shutdown.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A regeneration lifting pipeline shutdown processing system, characterized in that: include: a first pipeline, and a nitrogen lifting pipeline connected to the top of the first pipeline, wherein the nitrogen lifting pipeline is connected to an external nitrogen / hydrogen lifting pipeline; a main gate valve is arranged at the root of the connection between the nitrogen lifting pipeline and the first pipeline, two flange connection valves are arranged at the front end of the main gate valve, a shower valve and a pressure gauge are arranged between the two flange connection valves; a one-way valve is arranged at the flange connection valve position close to the front end.

2. A regeneration lifting pipeline shutdown processing system according to claim 1, characterized in that: The first pipeline is also connected to a regeneration nitrogen storage tank via a pipeline.

3. A regeneration lifting pipeline shutdown processing system according to claim 1, characterized in that: A pipeline is also led out from the front end of the pipeline connected to the regenerated nitrogen storage tank and returned to the nitrogen booster.

4. A regeneration lifting pipeline shutdown processing system according to claim 1, characterized in that The nitrogen lifting pipeline is also provided with a second pipeline connected to the pressure swing adsorption hydrogen purification device and located at the front end of the one-way valve.

5. A regeneration lifting pipeline shutdown processing system according to claim 4, characterized in that A third pipeline connected to the reforming hydrogen dechlorination tank is also provided at the front end of the second pipeline, and a control valve group and a shower valve are arranged at the front end of the third pipeline.

6. A regeneration lifting pipeline shutdown processing system according to claim 5, characterized in that The third pipeline is also branched with a bypass pipeline and connected to the end of the nitrogen lifting pipeline, and a bypass valve is arranged on the bypass pipeline.

7. A regeneration lifting pipeline shutdown processing system according to claim 4, characterized in that The second pipeline is provided with a first valve and a second valve in sequence from the air intake direction.

8. A regeneration lifting pipeline shutdown processing system according to claim 1, characterized in that The specifications of the two flange connection valves are DN100 and PN5.0; the nitrogen lifting pipelines at the positions of the two flange connection valves are PN5.

0.

9. A regeneration lifting pipeline shutdown processing system according to claim 1, characterized in that The shower guide valve is arranged between two flange connection valves, and a pressure gauge is arranged between the shower guide valve and the upper flange connection valve.

10. A regeneration lifting pipeline shutdown processing system according to claim 9, characterized in that The specification of the shower valve between the two flange-connected valves is DN15, PN5.0.

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