Bypass reactor

Abstract

The utility model relates to the technical field of denitration, and discloses a bypass reactor which comprises a reactor main body, a bypass pipe is installed outside the side opposite to an inlet hole of the reactor main body, and an inlet closing pipe is installed on the lower portion of the reactor main body through a reactor inlet valve. An outlet folding pipe is mounted at the upper part of the reactor main body through a reactor outlet valve, an expansion joint is mounted in the middle of the bypass pipe, and a bypass valve is mounted in the lower end of the bypass pipe. According to the bypass reactor, the bypass pipe is arranged on the side face of the reactor main body, the first heat insulation coating and the second heat insulation coating are installed outside the reactor main body and the bypass pipe in a sleeving mode, and meanwhile the second heat insulation coating installed outside the bypass pipe is not installed at one end of the reactor main body; compared with the conventional external bypass design, the external bypass has the advantages that the overall design size is greatly reduced, and the requirement of a narrow space is met.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration, in particular to a bypass reactor. Background Technique

[0002] To meet the requirements of IMO emission regulations, ships are often equipped with SCR denitration systems to reduce NO x emissions.

[0003] To meet the requirements of different modes, there are two forms of reactors: external bypass and internal bypass. Among them, the external bypass reactor has a complex structure due to the separation of the main bypass design and often occupies a large space. Therefore, shipyards usually choose to use internal bypass reactors (main / bypass combined) to improve the space utilization rate of ships and reduce installation and maintenance costs. However, with the improvement of global environmental awareness and the increasing strictness of emission regulations, modern ships are increasingly using dual-fuel main engines to reduce environmental impact. The exhaust gas temperatures of some dual-fuel main engines in the gas and fuel states vary greatly, and the specific impact on the SCR reactor is two groups of modes with a large difference in exhaust gas temperature. If the internal bypass form is still used, due to the integrity of the internal bypass reactor, in order to meet both modes at the same time, the reactor needs to cope with higher temperatures and greater thermal stress challenges to the strength of the body structure, and thicker and more heat-resistant plates are often required for structural design, which often results in higher costs. For this reason, we propose a bypass reactor Content of the Utility Model

[0004] Aiming at the deficiencies of the existing bypass reactor, the utility model provides a bypass reactor, which has the advantages of solving the problem of exhaust gas temperature difference, meeting space requirements, and reducing costs, and solves the problems raised in the above background technique.

[0005] The utility model provides the following technical solution: a bypass reactor, including a reactor main body, a bypass pipe is installed outside the opposite side of the manhole of the reactor main body, an inlet closing pipe is installed at the lower part of the reactor main body through a reactor inlet valve, an outlet closing pipe is installed at the upper part of the reactor main body through a reactor outlet valve, an expansion joint is installed in the middle of the bypass pipe, and a bypass valve is installed inside the lower end of the bypass pipe.

[0006] Preferably, both ends of the bypass pipe are respectively communicated with the sides of the inlet closing pipe and the outlet closing pipe, and the bypass pipe is in a fitting state on the side of the reactor main body.

[0007] Preferably, the outside of the bypass pipe is provided with a first bypass sliding support and a second bypass sliding support, and the first bypass sliding support and the second bypass sliding support remain in a normal state with the fixed support.

[0008] Preferably, a first lifting lug, a second lifting lug and a third lifting lug are respectively installed outside the bypass pipe and at the outer part of the expansion joint, and any one group of the first lifting lug, the second lifting lug and the third lifting lug is connected with an elastic stay for ship structure.

[0009] Preferably, the outer parts of the reactor main body and the bypass pipe are respectively coated and installed with a first heat insulation coating and a second heat insulation coating. The outer surface temperature of the first heat insulation coating does not exceed 60°C, and at the same time, the second heat insulation coating sleeved outside the bypass pipe is away from the side close to the reactor main body.

[0010] Preferably, a fixed support, a first sliding support, a second sliding support and a third sliding support are arranged near the inlet on the reactor main body. The fixed support, the first sliding support, the second sliding support and the third sliding support are distributed on both sides of the manhole, and the fixed support is arranged near the soot blowing inlet.

[0011] Compared with the existing bypass reactor, the utility model has the following beneficial effects:

[0012] 1. For this bypass reactor, through the design of a compact external bypass reactor, it can be applied to the situation where the exhaust conditions of the main / bypass paths are inconsistent. For different temperatures, different materials and heat insulation coating thicknesses can be selected for the main / bypass paths, which greatly reduces the manufacturing cost and solves the problem that the structural strength does not meet the requirements caused by high temperature.

[0013] 2. For this bypass reactor, the bypass pipe is arranged on the side of the reactor main body, and a first heat insulation coating and a second heat insulation coating are sleeved outside the reactor main body and the bypass pipe. At the same time, the second heat insulation coating installed outside the bypass pipe is not installed at one end of the reactor main body, which can minimize the distance between the bypass and the main path. Compared with the conventional external bypass design, the overall design size is greatly reduced, meeting the requirements of narrow spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front view structural schematic diagram of the utility model;

[0015] Figure 2 is a side view structural schematic diagram of the utility model;

[0016] Figure 3 is a main body structural schematic diagram of the utility model;

[0017] Figure 4 is a structural schematic diagram of the novel bypass support sliding direction of the utility model.

[0018] In the figure: 1, reactor main body; 2, bypass pipe; 3, inlet closing pipe; 4, outlet closing pipe; 5, reactor inlet valve; 6, bypass valve; 7, reactor outlet valve; 8, expansion joint; 9, fixed support; 10, first sliding support; 11, second sliding support; 12, third sliding support; 13, first bypass sliding support; 14, second bypass sliding support; 15, first lifting lug; 16, second lifting lug; 17, third lifting lug; A, first heat insulation coating; B, second heat insulation coating. Detailed implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0020] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a bypass reactor, including a reactor main body 1, a bypass pipe 2 is installed outside the opposite side of the manhole of the reactor main body 1, the bypass pipe 2 drives the flue gas to bypass and transport, the lower part of the reactor main body 1 is installed with an inlet closing pipe 3 through a reactor inlet valve 5, by opening or closing the reactor inlet valve 5, the gas can be driven to discharge through the inlet closing pipe 3, the upper part of the reactor main body 1 is installed with an outlet closing pipe 4 through a reactor outlet valve 7, an expansion joint 8 is installed in the middle of the bypass pipe 2, a bypass valve 6 is installed inside the lower end of the bypass pipe 2, by opening the bypass valve 6, the bypass valve 6 drives the flue gas to be transported from the inside of the bypass pipe 2.

[0021] Please refer to Figure 1 , both ends of the bypass pipe 2 are respectively communicated with the sides of the inlet closing pipe 3 and the outlet closing pipe 4, the bypass pipe 2 is in a fitting state on the side of the reactor main body 1, by respectively communicating both ends of the bypass pipe 2 with the sides of the inlet closing pipe 3 and the outlet closing pipe 4, and simultaneously opening or closing the reactor inlet valve 5, the bypass valve 6 and the reactor outlet valve 7, the tail gas can be driven to be drawn out from the inside of the bypass pipe 2, and at the same time, the bypass pipe 2 is arranged on the side of the reactor main body 1, which minimizes the distance between the bypass and the main road, compared with the conventional external bypass design, the overall design size is greatly reduced.

[0022] Please refer to Figure 3, there are a first bypass sliding support 13 and a second bypass sliding support 14 provided outside the bypass pipe 2. The first bypass sliding support 13 and the second bypass sliding support 14 remain in a normal state with the fixed support 9. The first bypass sliding support 13 and the second bypass sliding support 14 are installed outside the bypass pipe 2, and the first bypass sliding support 13 and the second bypass sliding support 14 are parallel to the fixed support 9 installed outside the reactor main body 1, ensuring that the heights of the equipment on the same horizontal plane are the same. At the same time, according to the exhaust gas temperatures, pipe materials, and thermal expansion coefficients corresponding to the two exhaust gas path conditions, the vectors of the displacements synthesized in the X direction and the Y direction are calculated respectively, and then the vector angles under the two conditions are averaged. Finally, an average vector is obtained, which is the sliding direction of the sliding support, so as to improve the stability of the equipment during sliding installation.

[0023] Please refer to Figure 4 , a first lifting lug 15, a second lifting lug 16, and a third lifting lug 17 are respectively installed outside the bypass pipe 2 and outside the expansion joint 8. At the same time, any one group of the first lifting lug 15, the second lifting lug 16, and the third lifting lug 17 is connected to the elastic bracing for ship structure. By installing the first lifting lug 15, the second lifting lug 16, and the third lifting lug 17 outside the bypass pipe 2 and at the expansion joint 8, the first lifting lug 15, the second lifting lug 16, and the third lifting lug 17 can be used to lift and fix the equipment. At the same time, elastic supports can be installed outside the first lifting lug 15, the second lifting lug 16, and the third lifting lug 17 to improve the stability when the first lifting lug 15, the second lifting lug 16, and the third lifting lug 17 are used, and avoid damage to the expansion joint 8 caused by vibration.

[0024] Please refer to Figure 1 , a first heat insulation coating A and a second heat insulation coating B are respectively coated and installed outside the reactor main body 1 and the bypass pipe 2. The outer surface temperature of the first heat insulation coating A does not exceed 60°. At the same time, the second heat insulation coating B sleeved outside the bypass pipe 2 is far from the side close to the reactor main body 1. By coating and installing the first heat insulation coating A outside the reactor main body 1, the first heat insulation coating A conducts heat insulation protection treatment on the outside of the reactor main body 1 to avoid affecting the use of the equipment due to excessive temperature. At the same time, the second heat insulation coating B is sleeved outside the bypass pipe 2, and the second heat insulation coating B is not installed at one end of the reactor main body 1, that is, the second heat insulation coating B is coated outside the side of the bypass pipe 2, further reducing the distance between the reactor main body 1 and the bypass pipe 2.

[0025] Please refer to Figure 1, near the inlet on the reactor body 1, there are arranged a fixed support 9, a first sliding support 10, a second sliding support 11 and a third sliding support 12. Among them, the fixed support 9, the first sliding support 10, the second sliding support 11 and the third sliding support 12 are distributed on both sides of the manhole. The fixed support 9 is arranged near the soot blowing inlet and is set outside the reactor body 1 through the fixed support 9, and the position of the fixed support 9 is fixed. At the same time, according to the calculation of the fixed support and the thermal expansion direction, the first sliding support 10, the second sliding support 11 and the third sliding support 12 are set with different sliding directions. Waist-shaped holes are opened on the support body to form slide rails. After the bracket is installed, on the friction gasket, according to the slide rail guidance, it can be displaced in the corresponding direction when heated.

[0026] At the same time in this application, refer to Figure 4 , the solid line is the displacement in the X direction and the Y direction and their combined displacement T2 when the waste gas flows through the main path; the dotted line is the displacement in the X direction and the Y direction and their combined displacement T3 when the waste gas flows through the bypass; the dash-dotted line is the combined vector under the two working conditions, that is, the angle of the waist-shaped hole of the sliding bracket.

[0027] Working principle: During use, it is installed on the equipment through the inlet closing pipe 3 and the outlet closing pipe 4. At the same time, a first heat insulation coating A and a second heat insulation coating B are installed on the outside of the reactor body 1 and the bypass pipe 2. And according to the calculation of the fixed support and the thermal expansion direction, the first sliding support 10, the second sliding support 11 and the third sliding support 12 are set with different sliding directions. Waist-shaped holes are opened on the support body to form slide rails. After the bracket is installed, on the friction gasket, according to the slide rail guidance, it can be displaced in the corresponding direction when heated. Elastic supports can be installed outside the first lifting lug 15, the second lifting lug 16 and the third lifting lug 17. The first bypass sliding support 13 and the second bypass sliding support 14 are kept parallel to the fixed support 9 installed outside the reactor body 1 to ensure that the height of the equipment on the same horizontal plane is the same height to drive the equipment installation and positioning to maintain stability. By opening or closing the reactor inlet valve 5, the bypass valve 6 and the reactor outlet valve 7.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bypass reactor, comprising a reactor body (1), a bypass pipe (2) being installed on the outside of the reactor body (1) opposite to the inlet hole, characterized in that: The lower part of the reactor body (1) is provided with an inlet closing pipe (3) through a reactor inlet valve (5), the upper part of the reactor body (1) is provided with an outlet closing pipe (4) through a reactor outlet valve (7), the middle part of the bypass pipe (2) is provided with an expansion joint (8), and the lower end of the bypass pipe (2) is provided with a bypass valve (6).

2. A bypass reactor according to claim 1, characterized in that: The two ends of the bypass pipe (2) are respectively connected to the sides of the inlet closing pipe (3) and the outlet closing pipe (4), and the bypass pipe (2) is in a close fit with the side of the reactor body (1).

3. A bypass reactor according to claim 1, characterized in that: A first bypass sliding support (13) and a second bypass sliding support (14) are arranged outside the bypass pipe (2), and the first bypass sliding support (13) and the second bypass sliding support (14) are kept in a normal state with the fixed support (9).

4. A bypass reactor according to claim 1, characterized in that: A first lifting lug (15), a second lifting lug (16) and a third lifting lug (17) are respectively installed outside the bypass pipe (2) and outside the expansion joint (8), and any one group of the first lifting lug (15), the second lifting lug (16) and the third lifting lug (17) is connected to the ship structure by elastic bracing.

5. A bypass reactor according to claim 1, characterized in that: The outside of the reactor body (1) and the bypass pipe (2) are respectively covered with a first insulation coating (A) and a second insulation coating (B), wherein the surface temperature of the first insulation coating (A) does not exceed 60°, and the second insulation coating (B) sleeved on the outside of the bypass pipe (2) is away from the side close to the reactor body (1).

6. A bypass reactor according to claim 1, characterized in that: A fixed support (9), a first sliding support (10), a second sliding support (11) and a third sliding support (12) are arranged on the reactor body (1) near the inlet, wherein the fixed support (9), the first sliding support (10), the second sliding support (11) and the third sliding support (12) are distributed on both sides of the inlet hole, and the fixed support (9) is arranged near the soot blowing inlet.

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