A detachable steam injection boiler for offshore platforms

Abstract

The present invention belongs to the field of petroleum machinery technology, and particularly relates to a detachable offshore platform steam injection boiler, characterized by comprising a boiler body and auxiliary equipment. The boiler body comprises a radiant section, a convection section, and a heat exchanger. The radiant section comprises a combustion zone and a flue gas deflection zone, a multi-segment spiral tube bundle disposed within the combustion zone, and a horizontal serpentine reciprocating tube bundle disposed within the flue gas deflection zone. The combustion zone and the flue gas deflection zone each comprise a segmented cylinder, a flange connecting each two segmented cylinders, and an insulation layer. The convection section comprises multiple segments connected by a frame connecting flange, each segment comprising a side window frame, an elbow box, a convection tube bundle, a fixed tube sheet, and an insulation layer. The convection tube bundles of each segment are arranged sequentially from bottom to top within the convection section in the direction of flue gas flow. The present invention can be disassembled into lightweight structural units to meet the installation requirements of offshore platforms. The platform layout is rationally utilized to ensure the placement of the steam injection boiler and achieve thermal extraction on the offshore platform.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum machinery, and in particular relates to a detachable steam injection boiler for an offshore platform. Background Art

[0002] When deploying a steam injection boiler on an offshore platform, the installation method varies depending on the platform's characteristics. On some newly built platforms, the boiler can be installed alongside other equipment before going out to sea. Transport and hoisting facilities are readily available, making installation of the boiler easy. However, on existing or newly built platforms, installing the boiler as a whole is often difficult due to the limited lifting capacity of the onboard hoisting equipment. Therefore, a lightweight, compact, and detachable steam injection boiler is required. Summary of the Invention

[0003] The purpose of the present invention is to provide a detachable steam injection boiler for an offshore platform, which can reduce the weight of the separate parts of the steam injection boiler and ensure installation on the platform, thereby realizing thermal recovery of heavy oil on the offshore platform.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] The detachable offshore platform steam injection boiler of the present invention is characterized by comprising a boiler body, auxiliary equipment connected to the boiler body,

[0006] The boiler body includes a radiation section, a convection section arranged at the tail of the radiation section through a support frame, and a heat exchanger arranged outside the radiation section.

[0007] The auxiliary equipment includes a burner, a plunger pump and an air compressor arranged on the front end plate of the radiation section.

[0008] The radiation section includes a combustion zone and a flue gas turning zone, a multi-segment spiral tube bundle arranged in the combustion zone, and a horizontal serpentine reciprocating tube bundle arranged in the flue gas turning zone. The combustion zone and the flue gas turning zone both include segmented cylinders, flanges connecting each two segmented cylinders, and insulation layers arranged on and between the segmented cylinders.

[0009] The convection section includes a plurality of segments connected by frame connection flanges, each segment includes a side window frame, an elbow box arranged at the end of the side window frame, a convection tube bundle arranged in the side window frame, a fixed tube sheet and an insulation layer, and the convection tube bundles of each segment are arranged in sequence from bottom to top in the convection section according to the direction of flue gas flow.

[0010] The support frame is arranged outside the segmented cylinder in the smoke turning area.

[0011] The boiler body is a horizontal direct current type.

[0012] The heat exchanger is of U-shaped casing structure, and the arrangement structure of the heat exchanger is a top-mounted radiation section arrangement, a side-mounted radiation section arrangement, or a front-mounted radiation section arrangement.

[0013] The smoke diverting area is provided with a smoke outlet.

[0014] The convection tube bundle is a horizontal serpentine structure, with every 3-5 rows of smooth tubes or finned tubes being grouped together, and each group forming a segmented structure.

[0015] Advantages of the present invention:

[0016] (1) The detachable offshore platform steam injection boiler of the present invention can be disassembled into lightweight structural units to meet the installation requirements of offshore platforms;

[0017] (2) The detachable steam injection boiler for an offshore platform of the present invention rationally utilizes the platform layout, ensures the placement of the steam injection boiler, and realizes thermal exploitation of the offshore platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the boiler body of the present invention.

[0020] Figure 3 This is a schematic diagram of the radiation section structure of the present invention.

[0021] Figure 4 This is the radiation section tube bundle diagram of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the convection section of the present invention.

[0023] Figure 6 This is the tube bundle diagram of the convection section of the present invention.

[0024] Figure 7 It is a soda flow chart of the present invention. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention are further described below with reference to the accompanying drawings.

[0026] like Figure 1-7 As shown, the detachable offshore platform steam injection boiler of the present invention is characterized by comprising a boiler body 1, an auxiliary device 2 connected to the boiler body 1,

[0027] The boiler body 1 includes a radiation section 1-1, a convection section 1-2 arranged at the tail of the radiation section 1-1 through a support frame 1-4, and a heat exchanger 1-3 arranged outside the radiation section 1-1.

[0028] The auxiliary equipment 2 includes a burner 2-1, a plunger pump 2-2 and an air compressor arranged on the front end plate of the radiation section 1-1.

[0029] The radiation section 1-1 includes a combustion zone 1-1-1 and a flue gas turning zone 1-1-2, a multi-segment spiral tube bundle 1-1-6 arranged in the combustion zone 1-1-1, and a horizontal serpentine reciprocating tube bundle 1-1-7 arranged in the flue gas turning zone 1-1-2. The combustion zone 1-1-1 and the flue gas turning zone 1-1-2 each include a segmented cylinder 1-1-3, a flange 1-1-4 connecting each two segmented cylinders 1-1-3, and an insulation layer 1-5 arranged on and between the segmented cylinders 1-1-3.

[0030] The convection section 1-2 includes a plurality of segments connected by a frame connection flange 1-2-3, each segment includes a side window frame 1-2-2, an elbow box 1-2-1 arranged at the end of the side window frame 1-2-2, a convection tube bundle 1-2-4, a fixed tube sheet 1-2-5 and an insulation layer 1-5 arranged in the side window frame 1-2-2, and a light tube 1-2-4-2 and a finned tube 1-2-4-1 are arranged in sequence from bottom to top in the convection section 1-2 according to the direction of flue gas flow.

[0031] The support frame 1-4 is arranged outside the segmented cylinder 1-1-3 of the smoke turning area 1-1-2.

[0032] The boiler body 1 is a horizontal direct current type.

[0033] The heat exchanger 1-3 is of U-shaped casing structure, and the arrangement structure of the heat exchanger 1-3 is that the radiation section 1-1 is arranged on the top, the radiation section 1-1 is arranged on the side, or the radiation section 1-1 is arranged on the front.

[0034] The smoke deflection area 1-1-2 is provided with a smoke outlet.

[0035] The convection tube bundle 1-2-4 is a horizontal serpentine structure, and every 3-5 rows of smooth tubes 1-2-4-2 or finned tubes 1-2-4-1 are grouped together, and each group forms a segmented structure.

[0036] The detachable offshore platform steam injection boiler of the present invention adopts a horizontal direct current form and is composed of a boiler body 1 and auxiliary equipment 2. Figure 1 The steam injection boiler is arranged horizontally as a whole and is installed on a skid with the supporting pipelines. The plunger pumps 2-3 are skid-mounted together with the steam injection boiler or separately depending on the platform position.

[0037] The boiler body 1 adopts a horizontal structure, including a radiation section 1-1, a convection section 1-2 and a heat exchanger 1-3. The radiation section 1-3 is divided into several sections and then connected into an integral structure; the convection section 1-2 is divided into several sections and then connected into an integral structure. Figure 2 The burner 2-1 is installed on the front end plate of the radiation section 1-1, and a fire observation hole 3 is provided on the rear end plate for observing the combustion conditions in the radiation section 1-1. A support frame 1-4 is provided on the outside of the segmented cylinder 1-1-3 of the flue gas turning area 1-1-2 at the rear end of the radiation section 1-1 for the installation of the convection section 1-2. The heat exchanger 1-3 adopts a U-shaped sleeve structure. The heat exchanger 1-3 is divided into the structures of being mounted on the top of the radiation section 1-1, hanging on the side, and arranged in front of the radiation section 1-1, which can reduce the floor space on the platform. Figure 3 The radiation section 1-1 is a horizontal cylindrical structure, divided into a combustion zone 1-1-1 and a flue gas deflection zone 1-1-2. Each section is composed of a segmented cylinder 1-1-3 and an insulation layer 1-5. The sections are connected by flanges 1-1-4. After assembly, the joints are insulated and sealed. For disassembly, the sections are separated at flanges 1-1-4.

[0038] The radiation section tube bundle adopts a segmented structure. In the non-smoke turning area, it is a multi-segment spiral tube bundle 1-1-6, and then these segmented structures are connected together; in the smoke turning area, the 1-1-2 tube bundle adopts a horizontal serpentine reciprocating tube bundle 1-1-7. Figure 4 The radiant section tube bundle utilizes a spiral coil and horizontal serpentine reciprocating tube structure. The tube bundle within combustion zone 1-1-1 is spiral tube bundle 1-1-6, while the flue gas deflection zone 1-1-2 utilizes horizontal serpentine reciprocating tube bundle 1-1-7. The tube bundle within combustion zone 1-1-1 is segmented spiral tubes, each segment welded together. The tube bundle within flue gas deflection zone 1-1-2 utilizes horizontal serpentine reciprocating tubes arranged circumferentially along the cylinder. A flue gas outlet is provided at the upper end of segmented cylinder 1-1-3 to prevent the increased flue gas resistance that would be associated with the use of spiral tube bundle 1-1-6 in this area.

[0039] like Figure 5 The convection section 1-2 adopts a square box structure as a whole, which is a frame form made of welded steel plates. It adopts a segmented form. Each section is composed of a convection tube bundle 1-2-4, an elbow box 1-2-1, a side window frame 1-2-2, a fixed tube sheet 1-2-5 and an insulation layer 1-5. The sections are connected by a frame connection flange 1-2-3. When splitting, the sections are separated from the frame connection flange 1-2-3.

[0040] The convection section 1-2 adopts a light tube + fin tube structure, which is integrally installed on the support frame 1-4 at the tail of the radiation section 1-1. It adopts a segmented form, and the light tube 1-2-4-2 and the fin tube 1-2-4-1 are arranged in sequence from bottom to top in the convection section 1-2 according to the direction of flue gas flow. Figure 6Convection tube bundle 1-2-4 utilizes a serpentine reciprocating structure, consisting of bare tubes 1-2-4-2 and finned tubes 1-2-4-1. Elbows connect tube bundles, as do elbows between segments. Every 3-5 rows of bare tubes 1-2-4-2 or finned tubes 1-2-4-1 are grouped together, each forming a segment. These segments are then connected together. The working fluid flows from the top row of finned tubes 1-2-4-1 downward through each row of tube bundles, ultimately reaching the bottom row of bare tubes 1-2-4-2.

[0041] like Figure 7 The boiler steam-water process is as follows: the feed water is pressurized by the plunger pump 2-3 and sent to the outer tube of the heat exchanger 1-3. After being heated, it enters the convection section 1-2, absorbs the heat of the flue gas in the convection section 1-2, and then enters the inner tube of the heat exchanger 1-3 to exchange heat with the cold water in the outer tube. After heat exchange, it enters the radiation section 1-1 to produce qualified steam.

[0042] The detachable marine platform steam injection boiler of the present invention can be disassembled into lightweight structural units to meet the installation requirements of the marine platform; the platform layout is reasonably utilized to ensure the placement of the steam injection boiler and realize thermal mining of the marine platform.

Claims

1. A detachable offshore platform steam injection boiler, characterized in that Including the boiler body, auxiliary equipment connected to the boiler body, The boiler body is a horizontal direct current type, and includes a radiation section, a convection section arranged at the tail of the radiation section through a support frame, and a heat exchanger arranged outside the radiation section. The auxiliary equipment includes a burner, a plunger pump and an air compressor arranged on the front end plate of the radiation section. The radiation section includes a combustion zone and a flue gas turning zone, a multi-segment spiral tube bundle arranged in the combustion zone, and a horizontal serpentine reciprocating tube bundle arranged in the flue gas turning zone. The combustion zone and the flue gas turning zone both include segmented cylinders, flanges connecting each two segmented cylinders, and insulation layers arranged on and between the segmented cylinders. The convection section includes a plurality of segments connected by frame connection flanges, each segment includes a side window frame, an elbow box arranged at the end of the side window frame, a convection tube bundle arranged in the side window frame, a fixed tube sheet and an insulation layer, and the convection tube bundles of each segment are arranged in sequence from bottom to top in the convection section according to the direction of flue gas flow. The support frame is arranged outside the segmented cylinder in the smoke diverting area; The heat exchanger is of U-shaped casing structure, and the arrangement structure of the heat exchanger is a top-mounted radiation section arrangement, a side-mounted radiation section arrangement, or a front-mounted radiation section arrangement.

2. The detachable offshore platform steam injection boiler according to claim 1 is characterized in that The smoke turning area is provided with a smoke outlet.

3. The detachable offshore platform steam injection boiler according to claim 1 is characterized in that The convection tube bundle is a horizontal serpentine structure, with every 3-5 rows of smooth tubes or finned tubes being grouped together, and each group forming a segmented structure.

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