Split type radiation section of offshore platform steam injection boiler

Abstract

The present application belongs to the technical field of petroleum machinery, and particularly relates to a detachable radiation section of a steam injection boiler on an offshore platform, characterized by comprising a support, a horizontal cylinder arranged on the support, a front end plate and a rear end plate arranged at the front end and the tail end of the horizontal cylinder respectively, a tube bundle arranged in the cylinder through a tube card, and an insulating layer arranged in the cylinder through an insulating nail, wherein the cylinder comprises multiple cylinder sections and a semi-cylinder section, the tube bundle comprises multiple spiral tube bundles welded together, and a reciprocating tube bundle welded with the spiral tube bundle. The present application has a simple structure, the radiation section is detachable, each section can meet the installation requirements of the platform, and can meet the arrangement requirements of the steam injection boiler on the platform.

Description

Technical Field

[0001] This invention belongs to the field of petroleum machinery technology, and in particular relates to a detachable radiant section of a steam injection boiler for offshore platforms. Background Technology

[0002] The radiant section tube bundle of the steam injection boiler has a horizontal, serpentine reciprocating structure, with elbows connecting the tube bundles. The tube bundles are arranged circumferentially along the boiler shell, thus forming a complete, indivisible structure with a relatively large total weight. This is disadvantageous for the lifting conditions of some offshore platforms. Therefore, a radiant section structure that is smaller, lighter, and easier to install and connect is required. Summary of the Invention

[0003] The purpose of this invention is to provide a detachable radiant section for a steam injection boiler on an offshore platform that can be disassembled to reduce the weight of the unit, thereby enabling the application of steam injection boilers on platforms.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] The present invention relates to a detachable radiant section for a steam injection boiler on a marine platform, characterized by comprising a support, a horizontal cylindrical body mounted on the support, a front end plate and a rear end plate respectively mounted at the front and rear ends of the horizontal cylindrical body, a tube bundle mounted inside the horizontal cylindrical body via pipe clamps, and an insulation layer mounted inside the horizontal cylindrical body via insulation nails.

[0006] The horizontal cylindrical body comprises multiple cylindrical sections and one semi-cylindrical section.

[0007] The tube bundle includes multiple sections of helical tube bundle welded together, and a reciprocating tube bundle welded together with this helical tube bundle.

[0008] The front end plate is connected to the burner, and the rear end plate is connected to the fire door mechanism.

[0009] Each of the multi-section cylindrical sections is connected by welding or by connecting flanges.

[0010] The spiral tube bundle is fixed inside the multiple cylindrical sections by spiral tube clamps, and the reciprocating tube bundle is fixed inside the semi-cylindrical sections by split tube clamps.

[0011] The insulation layer includes a heavy castable layer and a soft insulation layer. The bottom of the horizontal cylinder is a heavy castable layer, the sides and top of the horizontal cylinder are soft insulation layers, and the front and rear plates are soft insulation layers.

[0012] The horizontal cylindrical body is welded with a reinforcing steel ring on the outside.

[0013] The support is in the form of an arc-shaped plate, which matches the outer arc of the horizontal cylinder.

[0014] Advantages of this invention:

[0015] (1) The detachable radiant section of the offshore platform steam injection boiler of the present invention has a simple structure and the radiant section is detachable, and each section can ensure the installation requirements of the platform.

[0016] (2) The detachable radiant section of the offshore platform steam injection boiler of the present invention can meet the layout requirements of the steam injection boiler of the platform in use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the horizontal cylindrical body of the present invention.

[0019] Figure 3 This is a schematic diagram of the internal insulation structure of the horizontal cylindrical body of the present invention.

[0020] Figure 4 This is a schematic diagram of the external structure of the horizontal cylindrical body of the present invention.

[0021] Figure 5 This is a diagram of the radiating section of the present invention.

[0022] Figure 6 This is a schematic diagram of the internal connection method of the tube bundle according to the present invention.

[0023] Figure 7 This is a schematic diagram of the external connection method of the tube bundle of the present invention. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-7 As shown, the detachable radiant section of the offshore platform steam injection boiler of the present invention is characterized by including a support 10, a horizontal cylindrical body 6 disposed on the support 10, a front end plate 3 and a rear end plate 8 respectively disposed at the front and rear ends of the horizontal cylindrical body 6, a tube bundle 4 disposed within the horizontal cylindrical body 6 by pipe clamps 1, and an insulation layer 2 disposed within the horizontal cylindrical body 6 by insulation nails.

[0026] The horizontal cylindrical body 6 includes multiple cylindrical sections 6-1 and a semi-cylindrical section 6-2.

[0027] The tube bundle 4 includes multiple sections of spiral tube bundle 4-1 welded together, and a reciprocating tube bundle 4-2 welded together with the spiral tube bundle 4-1.

[0028] The front end plate 3 is connected to the burner, and the rear end plate 8 is connected to the fire door mechanism 9.

[0029] Each segment of the multi-section cylindrical section 6-1 is connected by welding or by connecting flange 5.

[0030] The spiral tube bundle 4-1 is fixed inside the multi-section cylindrical section 6-1 by spiral tube clamp 1-1, and the reciprocating tube bundle 4-2 is fixed inside the semi-cylindrical section 6-2 by split tube clamp 1-2.

[0031] The insulation layer 2 includes a heavy castable layer 2-1 and a soft insulation layer 2-2. The bottom of the horizontal cylinder 6 is the heavy castable layer 2-1, the sides and top of the horizontal cylinder 6 are the soft insulation layer 2-2, and the front plate 3 and the rear plate 8 are the soft insulation layer 2-2.

[0032] The horizontal cylindrical body 6 is externally welded with a reinforcing steel ring 7.

[0033] The support 10 is in the form of an arc plate, which matches the outer arc of the horizontal cylinder 6.

[0034] The detachable radiant section of the offshore platform steam injection boiler of the present invention, such as Figure 1 The radiant section has a horizontally arranged structure, including a horizontal cylinder (6), supports (10), insulation layer (2), tube bundle (4), pipe clamps (1), reinforcing steel rings (7), front end plate (3), rear end plate (8), fire door mechanism (9), and connecting flanges (5). The radiant section's position in the overall steam-water system of the steam injection boiler is as follows: its inlet is at the heat exchanger tube side or convection section outlet, and its outlet is at the superheated section or high-pressure section inlet or direct injection well. For example... Figure 2 The horizontal cylindrical body is divided into several sections, with the number of sections determined according to the installation requirements of the offshore platform. Each section is made of rolled steel plate, and the sections are connected by welding or flanges. The cylindrical body includes several complete cylindrical sections 6-1 and one semi-cylindrical section 6-2, which is formed by cutting off a portion of the complete cylindrical section 6-1. Each section is assembled by welding or flanges to form a complete radial cylindrical body structure. Figure 3 The insulation layer 2 is laid on the inner surface of the horizontal cylinder 6 and on the front end plate 3 and rear end plate 8. The bottom of the horizontal cylinder 6 uses a heavy-duty castable refractory layer 2-1 to ensure it does not deform after being stepped on. The remaining parts of the horizontal cylinder 6 use a soft insulation layer 2-2 to reduce the overall weight of the radiant section. The front end plate 3 and rear end plate 8 use a soft insulation layer 2-2, which is easy to fix and lay. Figure 4A plurality of reinforcing steel rings 7 are evenly arranged axially on the outer surface of the horizontal cylindrical body 6, including reinforcing channel steel rings 7-1 and reinforcing angle steel rings 7-2. The horizontal cylindrical body 6 is mounted on a support 10, and the support 10 and the reinforcing channel steel rings 7-1 are welded together by an arc-shaped plate; the reinforcing angle steel rings 7-2 are arranged at both ends of the horizontal cylindrical body 6, used for connecting the horizontal cylindrical body 6 with the front end plate 3 and the rear end plate 8, forming a complete radiant section structure. A burner 12 is installed on the front end plate 3 for fuel combustion; a fire observation door mechanism 9 is installed on the rear end plate 8 for observing the combustion status within the radiant section. Figure 5 The radiant section tube bundle 4 is divided into helical tube bundle 4-1 and reciprocating tube bundle 4-2. The number of segments in the helical tube bundle 4-1 is the same as the number of complete cylindrical sections 6-1, and they are fixed within each complete cylindrical section 6-1 by helical tube clamps 1-1. The reciprocating tube bundle 4-2 is a single segment, fixed within a semi-cylindrical section 6-2 by split tube clamps 1-2. The helical tube bundle 4-1 can be arranged in a close-packed manner or have a certain pitch. Multiple segments of the helical tube bundle 4-1 are welded together and then welded together with the reciprocating tube bundle 4-2 to form a complete radiant section heating surface. The working fluid flows within the helical tube bundle 4-1 and the reciprocating tube bundle 4-2. Connections between the segments of the helical tube bundle 4-1 and between the helical tube bundle 4-1 and the reciprocating tube bundle 4-2 can be made in two ways. Figure 6 One method is to connect the horizontal cylinder 6 internally, such as... Figure 7 Another method is external connection of the horizontal cylindrical body 6. The internal connection method of the horizontal cylindrical body 6 is as follows: a pipe connector is reserved at both ends of each spiral tube bundle 4-1, and the connectors at the beginning and end of each segment are connected sequentially. The connector at the end of the last spiral tube bundle 4-1 is connected to the beginning of the reciprocating tube bundle 4-2. The external connection method of the horizontal cylindrical body 6 is as follows: a pipe connector is reserved at both ends of each spiral tube bundle 4-1 and extends beyond the outside of the horizontal cylindrical body 6. Corresponding holes are opened on the side wall of the horizontal cylindrical body 6 according to the location of the pipe connectors. The connectors of the two spiral tube bundles 4-1 extending beyond the outside of the horizontal cylindrical body 6 are connected to the header 11. The connector at the end of the last spiral tube bundle 4-1 is also connected to the beginning of the reciprocating tube bundle 4-2 outside the horizontal cylindrical body 6 via the header 11. The openings in the horizontal cylindrical body 6 are insulated and sealed.

[0035] The present invention relates to a detachable radiant section for a marine platform steam injection boiler. The structure is simple, and the radiant section is detachable, with each section ensuring the platform's installation requirements; it can meet the layout requirements of steam injection boilers on in-use platforms.

Claims

1. A detachable radiant section for a steam injection boiler on an offshore platform, characterized in that... The system includes a support, a horizontal cylindrical body mounted on the support, front and rear plates respectively mounted at the beginning and end of the horizontal cylindrical body, a pipe bundle installed inside the horizontal cylindrical body via pipe clamps, and an insulation layer installed inside the horizontal cylindrical body via insulation nails. The horizontal cylindrical body comprises multiple cylindrical sections and one semi-cylindrical section. Each of the multiple cylindrical sections is connected by welding or by connecting flanges. The tube bundle includes multiple sections of spiral tube bundle welded together, and a reciprocating tube bundle welded together with these spiral tube bundles. The spiral tube bundle is fixed within the multiple cylindrical sections by spiral tube clamps, and the reciprocating tube bundle is fixed within the semi-cylindrical sections by split tube clamps. The front end plate is connected to the burner, and the rear end plate is connected to the fire door mechanism.

2. The detachable radiant section of the offshore platform steam injection boiler according to claim 1, characterized in that... The insulation layer includes a heavy castable layer and a soft insulation layer. The bottom of the horizontal cylinder is a heavy castable layer, the sides and top of the horizontal cylinder are soft insulation layers, and the front and rear plates are soft insulation layers.

3. The detachable radiant section of the offshore platform steam injection boiler according to claim 1, characterized in that... The horizontal cylindrical body is welded with a reinforcing steel ring on the outside.

4. The detachable radiant section of the offshore platform steam injection boiler according to claim 1, characterized in that... The support is in the form of an arc-shaped plate, which matches the outer arc of the horizontal cylinder.

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