Pipeline of carbon washing tower outlet for synthetic ammonia production

Abstract

The utility model relates to the technical field of carbon washing tower pipelines, in particular to a pipeline of a carbon washing tower outlet for synthetic ammonia production. The device comprises a synthesis gas main pipeline, the exhaust tail end of the synthesis gas main pipeline is connected with the next adjacent process, the head end of the synthesis gas main pipeline is connected with a replacement exhaust pipeline, and a synthesis gas exhaust pipeline, a replacement gas inlet pipeline and a third valve are sequentially arranged on a pipe body between the head end and the exhaust tail end of the synthesis gas main pipeline; wherein the replacement gas inlet pipeline is arranged adjacent to the third valve, a fifth valve, a second valve and a sixth valve are respectively mounted on the replacement gas inlet pipeline, the synthesis gas discharge pipeline and the replacement discharge pipeline, and the second valve is mounted on an outlet section, adjacent to the synthesis gas main pipeline, of the synthesis gas discharge pipeline. According to the utility model, the synthesis gas in the synthesis gas header pipe can be discharged, and the potential safety hazard of the pipeline in the maintenance and replacement process of fire operation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to carbon wash tower pipeline technical field, specifically a kind of pipeline for carbon wash tower export of synthetic ammonia production. BACKGROUND

[0002] The pipeline of carbon wash tower export is used for the pipeline of the synthesis gas in carbon wash tower into shift section. As the text in the patent with CN107216919A as the name of the inhibition method of peroxide explosion of carbon wash tower of coal water slurry gasification device, the mixture of water vapor and synthesis gas enters carbon wash tower, and enters water bath in tower bottom along descending pipe. Synthesis gas passes through water layer upwards, and most solid particles are separated from synthesis gas and settled to tower bottom part, continue to contact with condensate liquid, and wash away remaining solid particles, and finally leave carbon wash tower and enter shift section.

[0003] Traditional synthetic ammonia production gasification workshop generally has three sets of gasifier system, two open one spare. Among them, the synthesis gas discharge pipeline of the three carbon wash towers of three sets of gasifier system is connected into root synthesis gas main pipeline and sent to shift section. Because blockage, corrosion and other faults often occur after long time use, pipeline needs to be overhauled and replaced by gas cutting, electric welding and other fire operation. But because synthesis gas main pipe is connecting pipeline between carbon wash tower and sending variable section, carbon wash tower and sending variable section are often not in a workshop when actual section is divided, which makes synthesis gas main pipeline not only large span but also many turning nodes, which leads to the possibility of remaining synthesis gas composed of hydrogen, methane, ammonia and the like in synthesis gas main pipe, especially in the turning nodes of synthesis gas main pipe, which makes fire operation overhaul and replacement process have the risk of fire and explosion, so it is urgent to be solved. UTILITY MODEL CONTENT

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a pipeline for carbon wash tower export of synthetic ammonia production, which can discharge synthesis gas in synthesis gas main pipe and reduce the safety hidden danger of pipeline in fire operation overhaul and replacement process.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A pipeline for carbon wash tower export of synthetic ammonia production, comprising a synthesis gas main pipeline, the exhaust end of the synthesis gas main pipeline is connected to the next adjacent process, and the first end of the synthesis gas main pipeline is connected to a displacement discharge pipeline. A synthesis gas discharge pipeline, a displacement intake pipeline and a third valve are arranged in sequence on the pipe body between the first end and the exhaust end of the synthesis gas main pipeline. The displacement intake pipeline is arranged adjacent to the third valve. Fifth, second and sixth valves are installed on the displacement intake pipeline, synthesis gas discharge pipeline and displacement discharge pipeline respectively, and the second valve is installed on the outlet section of the synthesis gas discharge pipeline adjacent to the synthesis gas main pipeline.

[0007] As a further scheme of the utility model: along the discharge direction of synthetic gas, fourth valve and guide pipeline are sequentially installed on synthetic gas main pipeline, and synthetic gas discharge pipeline, fourth valve and guide pipeline are sequentially and adjacently arranged along the discharge direction of synthetic gas, the inlet section of synthetic gas discharge pipeline is further installed with first valve, the tail end of guide pipeline is connected with synthetic gas discharge pipeline, and the tail end of guide pipeline is between first valve and second valve, and the tail end of guide pipeline is arranged adjacent to first valve, and the head end of guide pipeline is installed with control valve.

[0008] As a further scheme of the utility model: synthetic gas discharge pipeline is arranged as at least two groups, and at least two interval arranged connecting nodes are arranged between all synthetic gas discharge pipelines and synthetic gas main pipeline, and adjacent synthetic gas discharge pipelines are communicated with each other through transfer pipeline, and the transfer pipeline is between first valve and second valve, and the end of transfer pipeline is arranged adjacent to first valve;The corresponding synthetic gas discharge pipeline of transfer pipeline and connecting node closest to replacement air inlet pipeline constitutes the guide pipeline, and the second valve on the corresponding synthetic gas discharge pipeline of connecting node closest to replacement air inlet pipeline constitutes the control valve.

[0009] As a further scheme of the utility model: the tail end of replacement air inlet pipeline is connected with replacement gas tank.

[0010] As a further scheme of the utility model: the replacement gas in replacement gas tank is nitrogen.

[0011] As a further scheme of the utility model: the tail end of replacement discharge pipeline is connected with flare.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1, when the synthetic gas main pipeline is overhauled, the second valve on the synthetic gas discharge pipeline and the third valve on the synthetic gas main pipeline are closed;At the same time, the fifth valve on the replacement air inlet pipeline and the sixth valve on the replacement discharge pipeline are opened. The replacement gas is introduced into the synthetic gas main pipeline through the replacement air inlet pipeline, so that the residual synthetic gas in the synthetic gas main pipeline is discharged outward through the replacement discharge pipeline with the replacement gas, and the safety hidden trouble of the synthetic gas main pipeline in the overhaul process is reduced.

[0014] 2、Set up the guide pipeline which can be used to discharge the residual synthesis gas in the synthesis gas discharge pipeline. By closing the first valve, the third valve and the fourth valve, and opening the fifth valve, the sixth valve, the second valve and the control valve at the head of the guide pipeline. Make the displacement gas into the synthesis gas main pipeline through the displacement gas inlet pipeline, the displacement gas will flow through the outlet section of the synthesis gas main pipeline, the guide pipeline and the synthesis gas discharge pipeline in turn, and finally enter the synthesis gas main pipeline again and be discharged from the displacement discharge pipeline. Thus, the residual synthesis gas in the synthesis gas main pipeline and the synthesis gas discharge pipeline is discharged, reducing the safety hazard of the synthesis gas main pipeline and the synthesis gas discharge pipeline during maintenance and replacement.

[0015] 3、The synthesis gas discharge pipeline is set to multiple groups of working conditions, and the guide pipeline is formed by the corresponding synthesis gas discharge pipeline and the adapter pipeline which are most adjacent to the displacement gas inlet pipeline. Without setting up the guide pipeline, the cost of the device is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view of embodiment 1 in the utility model description.

[0017] Figure 2 It is a structure schematic view of embodiment 2 in the utility model description.

[0018] In the figure: 10, synthesis gas discharge pipeline; 11, first valve; 12, second valve; 20, synthesis gas main pipeline; 21, third valve; 22, fourth valve; 30, displacement gas inlet pipeline; 31, fifth valve; 40, displacement gas tank; 50, torch; 60, displacement discharge pipeline; 61, sixth valve; 70, adapter pipeline. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] For the convenience of understanding, the specific structure and working mode of the utility model are described further as follows with reference to the drawings:

[0021] The specific structure of the utility model refers to Figures 1-2As shown, its main structure includes a synthesis gas main pipeline 20, the exhaust end of the synthesis gas main pipeline 20 is connected to the next adjacent process, the first end of the synthesis gas main pipeline 20 is connected to a replacement exhaust pipeline 60, and between the first end and the exhaust end of the synthesis gas main pipeline 20, a synthesis gas exhaust pipeline 10, a replacement intake pipeline 30 and a third valve 21 are arranged in sequence on the pipe body. Among them, the replacement intake pipeline 30 is arranged adjacent to the third valve 21, and the replacement intake pipeline 30, the synthesis gas exhaust pipeline 10 and the replacement exhaust pipeline 60 are respectively provided with a fifth valve 31, a second valve 12 and a sixth valve 61, and the second valve 12 is installed on the outlet section of the synthesis gas exhaust pipeline 10 adjacent to the synthesis gas main pipeline 20. When the synthesis gas main pipeline 20 is overhauled, the second valve 12 on the synthesis gas exhaust pipeline 10 and the third valve 21 on the synthesis gas main pipeline 20 are closed; at the same time, the fifth valve 31 on the replacement intake pipeline 30 and the sixth valve 61 on the replacement exhaust pipeline 60 are opened. The replacement gas is introduced into the synthesis gas main pipeline 20 through the replacement intake pipeline 30, so that the residual synthesis gas in the synthesis gas main pipeline 20 is discharged outward together with the replacement gas through the replacement exhaust pipeline 60, thereby reducing the safety hazards of the synthesis gas main pipeline 20 during the overhaul and replacement process.

[0022] On the basis of the above, as shown in Figure 1 the fourth valve 22 and the guide pipeline are arranged in sequence on the synthesis gas main pipeline 20 along the discharge direction of the synthesis gas, and the synthesis gas exhaust pipeline 10, the fourth valve 22 and the guide pipeline are arranged in sequence along the discharge direction of the synthesis gas. The inlet section of the synthesis gas exhaust pipeline 10 is also provided with a first valve 11, the end of the guide pipeline is connected to the synthesis gas exhaust pipeline 10, the end of the guide pipeline is between the first valve 11 and the second valve 12, and the end of the guide pipeline is arranged adjacent to the first valve 11, and the first end of the guide pipeline is provided with a control valve. In this embodiment, the guide pipeline can be used to discharge the residual synthesis gas in the synthesis gas exhaust pipeline 10. Specifically, the first valve 11, the third valve 21 and the fourth valve 22 are closed, and the fifth valve 31, the sixth valve 61, the second valve 12 and the control valve at the first end of the guide pipeline are opened. The replacement gas introduced into the synthesis gas main pipeline 20 through the replacement intake pipeline 30 flows through the outlet section of the synthesis gas main pipeline 20, the guide pipeline and the synthesis gas exhaust pipeline 10 in sequence, and finally enters the synthesis gas main pipeline 20 again and is discharged from the replacement exhaust pipeline 60, thereby discharging the residual synthesis gas in the synthesis gas main pipeline 20 and the synthesis gas exhaust pipeline 10 outward, thereby reducing the safety hazards of the synthesis gas main pipeline 20 and the synthesis gas exhaust pipeline 10 during the overhaul and replacement process.

[0023] On the basis of the above, as shown in Figure 2 Since example 1 mainly deals with the condition that the synthesis gas exhaust pipeline 10 is a group, in specific implementation, as shown inFigure 2 As shown, there are also multiple sets of synthesis gas discharge pipelines 10. When the synthesis gas discharge pipelines 10 are arranged in at least two sets, at least two spaced-apart connection nodes are arranged between all the synthesis gas discharge pipelines 10 and the synthesis gas main pipeline 20. The adjacent synthesis gas discharge pipelines 10 are communicated with each other through the transfer pipeline 70, and the transfer pipeline 70 is between the first valve 11 and the second valve 12, and the end of the transfer pipeline 70 is arranged adjacent to the first valve 11. The corresponding synthesis gas discharge pipeline 10 and the transfer pipeline 70 of the connection node closest to the displacement gas inlet pipeline 30 constitute a guide pipeline, and the second valve 12 on the corresponding synthesis gas discharge pipeline 10 closest to the displacement gas inlet pipeline 30 constitutes the control valve. The working principle of this embodiment is the same as that of the above-mentioned embodiment 1, which will not be described here. Different from the above-mentioned embodiment 1, in this embodiment, the guide pipeline is formed by the corresponding synthesis gas discharge pipeline 10 and the transfer pipeline 70 closest to the displacement gas inlet pipeline 30, without the need to additionally arrange the guide pipeline in the manner of embodiment 1, thereby reducing the overall cost of the device.

[0024] On the basis of the above, Figure 1 or Figure 2 As shown, the end of the displacement gas inlet pipeline 30 is connected to the displacement gas tank 40. The displacement gas tank 40 is used to ensure the sealing of the end of the displacement gas inlet pipeline 30, so as to prevent the fifth valve 31 on the displacement gas inlet pipeline 30 from causing leakage of the synthesis gas main pipeline 20.

[0025] The displacement gas in the displacement gas tank 40 is nitrogen. Nitrogen is not chemically active and is not easy to react with other substances, and nitrogen is lighter than liquefied petroleum gas. In actual implementation, other inert gases such as helium can also be used as displacement gas.

[0026] On the basis of the above, the end of the displacement discharge pipeline 60 is connected to the flare 50, which not only can burn the displaced synthesis gas, but also can ensure that the synthesis gas in the synthesis gas main pipeline 20 will not be directly discharged into the atmosphere even if the sixth valve 61 leaks.

[0027] Of course, for those skilled in the art, the present application is not limited to the details of the above-mentioned exemplary embodiments, but also includes the same or similar structures that can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0028] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

[0029] The technical, shape and structure parts not described in detail in the utility model are well-known technologies.

Claims

1. A line for the outlet of a carbon wash column for synthetic ammonia production, comprising a synthesis gas main line (20), characterized in that, The exhaust end of the synthesis gas main pipeline (20) is connected to the next adjacent process, the first end of the synthesis gas main pipeline (20) is connected to the displacement exhaust pipeline (60), and the pipeline between the first end and the exhaust end of the synthesis gas main pipeline (20) is sequentially arranged with the synthesis gas exhaust pipeline (10), the displacement intake pipeline (30) and the third valve (21); wherein the displacement intake pipeline (30) is arranged adjacent to the third valve (21), the displacement intake pipeline (30), the synthesis gas exhaust pipeline (10) and the displacement exhaust pipeline (60) are respectively provided with the fifth valve (31), the second valve (12) and the sixth valve (61), and the second valve (12) is arranged on the outlet section of the synthesis gas exhaust pipeline (10) adjacent to the synthesis gas main pipeline (20).

2. A line for the outlet of a carbon wash column for ammonia production according to claim 1, characterized in that, In the discharge direction of the synthesis gas, the fourth valve (22) and the guide pipeline are sequentially arranged on the synthesis gas main pipeline (20), and the synthesis gas exhaust pipeline (10), the fourth valve (22) and the guide pipeline are sequentially arranged adjacent to each other in the discharge direction of the synthesis gas, the inlet section of the synthesis gas exhaust pipeline (10) is further provided with the first valve (11), the end of the guide pipeline is connected with the synthesis gas exhaust pipeline (10), and the end of the guide pipeline is between the first valve (11) and the second valve (12), and the end of the guide pipeline is arranged adjacent to the first valve (11), and the first end of the guide pipeline is provided with a control valve.

3. A line for the outlet of a carbon wash column for ammonia production according to claim 2, characterized in that, The synthesis gas exhaust pipeline (10) is provided as at least two groups, and at least two spaced-apart connection nodes are provided between all synthesis gas exhaust pipelines (10) and the synthesis gas main pipeline (20), the adjacent synthesis gas exhaust pipelines (10) are communicated with each other through the adapter pipeline (70), and the adapter pipeline (70) is between the first valve (11) and the second valve (12), and the end of the adapter pipeline (70) is arranged adjacent to the first valve (11); the guide pipeline is composed of the corresponding synthesis gas exhaust pipeline (10) of the connection node closest to the displacement intake pipeline (30) and the adapter pipeline (70), and the second valve (12) on the corresponding synthesis gas exhaust pipeline (10) of the connection node closest to the displacement intake pipeline (30) constitutes the control valve.

4. A line for the outlet of a carbon wash column for the production of ammonia according to claim 1 or 2 or 3, characterized in that, The end of the displacement intake pipeline (30) is connected to the displacement gas tank (40).

5. A line for the outlet of a carbon wash column for ammonia production according to claim 4, characterized in that, The displacement gas in the displacement gas tank (40) is nitrogen.

6. A line for the outlet of a carbon wash column for the production of ammonia according to claim 1 or 2 or 3, characterized in that, The end of the displacement exhaust pipeline (60) is connected to the flare (50). The end of the displacement exhaust pipeline (60) is connected to the flare (50).

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