Water heating system of offshore concrete gravity type LNG receiving platform
By installing a water heating system on an offshore concrete gravity LNG receiving platform, and utilizing seawater desalination and heating devices to provide heat to the platform structure, the problem of freeze-thaw damage in frigid environments was solved, thus protecting the concrete structure and extending the platform's lifespan.
Patent Information
- Application Number
- CN202423098493.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing offshore concrete gravity LNG receiving platforms are susceptible to freeze-thaw damage in frigid environments, leading to a decline in the performance of the concrete structure and affecting the platform's service life.
A water heating system is adopted, which provides heat to the platform structure through seawater desalination and heating devices to avoid freeze-thaw damage to the concrete structure. The system includes water pumps, seawater pools, seawater desalination devices, freshwater pools, heating devices and heating pipelines, and uses heating pipelines to heat various parts of the platform.
It effectively maintains the temperature of the concrete structure above 5°C, avoids freeze-thaw damage, and extends the service life of the platform.
Smart Images
Figure CN223596208U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a water heating system of offshore concrete gravity type LNG receiving platform. BACKGROUND
[0002] LNG (liquefied natural gas) receiving station refers to the middle pivot that receives the liquefied natural gas of sea ship, stores it and re-vaporizes north to user, is generally built in coastal port, is close to industry or residential area.Considering the low temperature characteristic of LNG, the storage tank material is stainless steel, and the shell is provided with heat preservation layer.
[0003] In recent years, with the enhancement of people's environmental protection consciousness, the construction of LNG receiving station on coastal land is more and more limited.LNG receiving and storage plant and other dangerous goods warehouse are arranged in offshore sea area, and keep enough safety distance from land near residential area.The cost of steel structure storage tank is high, and the corrosion resistance is poor, and the change of environmental conditions puts forward new requirements for the structure and material of storage tank.
[0004] In offshore sea area, the LNG receiving station constructed by adopting concrete gravity type platform structure, LNG is refrigerated to-162 DEG C under normal pressure to make it present liquid state.Although LNG storage tank has heat insulation layer, the low temperature characteristic of LNG can still cause freeze-thaw damage of storage tank partition concrete structure to different degrees, and the mechanical properties such as compressive strength and tensile strength of concrete are greatly reduced, which seriously affects the performance of concrete material, and causes the service life of platform to be far lower than the design life. INVENTION CONTENTS
[0005] The utility model aims at overcoming the defects of prior art and provides a water heating system of offshore concrete gravity type LNG receiving platform, which can avoid freeze-thaw damage of concrete structure in severe cold environment and prolong the service life of oil and gas platform.
[0006] The utility model aims at overcoming the defects of prior art and provides a water heating system of offshore concrete gravity type LNG receiving platform, which can avoid freeze-thaw damage of concrete structure in severe cold environment and prolong the service life of oil and gas platform.
[0007] The box body includes box body top plate, box body bottom plate, west outer wall, east outer wall, south end wall and north end wall;The inside of the box body is provided with a west longitudinal partition wall, an east longitudinal partition wall and an upper bottom plate arranged between the lower part of the west longitudinal partition wall and the lower part of the east longitudinal partition wall;
[0008] The LNG storage tank is surrounded by the west longitudinal partition wall, the top plate, the east longitudinal partition wall, the upper bottom plate, the south end wall and the north end wall;
[0009] The SGC storage tank comprises a west SGC storage tank and an east SGC storage tank; the west SGC storage tank is surrounded by a west longitudinal partition wall, a west side of the top plate, a west outer wall, a west side of the south end wall and a west side of the north end wall; the east SGC storage tank is surrounded by an east longitudinal partition wall, an east side of the top plate, an east outer wall, an east side of the south end wall and an east side of the north end wall;
[0010] A two-way transverse partition wall is arranged between the middle of the length of the west outer wall and the middle of the length of the east outer wall, so that the LNG storage tank, the west SGC storage tank and the east SGC storage tank are all divided into a front LNG storage tank, a rear LNG storage tank, a front west SGC storage tank, a rear west SGC storage tank, a front east SGC storage tank and a rear east SGC storage tank; the west longitudinal partition wall and the east longitudinal partition wall are both double-wall structures;
[0011] The ballast tank comprises a middle ballast tank, a west ballast tank and an east ballast tank; wherein,
[0012] The middle ballast tank is surrounded by an upper bottom plate, a middle part of the tank bottom plate, a lower part of the west longitudinal partition wall, a lower part of the east longitudinal partition wall, a middle lower part of the south end plate and a middle lower part of the north end plate; the middle ballast tank is divided into five middle ballast tank units by arranging four lower longitudinal partition walls in the middle ballast tank;
[0013] The longitudinal section of the west ballast tank and the longitudinal section of the east ballast tank are both rectangular and have the same size; the west ballast tank is located outside the west outer wall and is surrounded by the west outer wall, a west end top plate, a west end outer wall, a west end bottom plate, a west south end plate and a west north end plate; the west end bottom plate is integrally extended outward from the west end of the tank bottom plate; the east ballast tank is located outside the east outer wall and is surrounded by the east outer wall, an east end top plate, an east end outer wall, an east end bottom plate, an east south end plate and an east north end plate; the east end bottom plate is integrally extended outward from the east end of the tank bottom plate; the height of the west end top plate and the height of the east end top plate are the same and are lower than the height of the caisson top plate;
[0014] The water heating system comprises a water pump, a seawater pool, a seawater desalination device, a fresh water pool, a heating device, a water collecting and distributing device and a heating pipeline which are connected in sequence; wherein,
[0015] The water pump, the seawater desalination device, the heating device and the water collecting and distributing device are all arranged between the middle of the two-way transverse partition wall; the seawater pool utilizes two middle ballast tank units on the east side of the middle ballast tank; the fresh water pool utilizes two middle ballast tank units on the west side of the middle ballast tank;
[0016] A temperature controller is installed on each branch outlet interface of the water collecting and distributing device;
[0017] The heating pipeline comprises a top plate heating pipeline, a bottom plate heating pipeline, a west outer wall heating pipeline, an east outer wall heating pipeline, a south end wall heating pipeline and a north end wall heating pipeline;
[0018] Each of the heating pipelines comprises a heating main pipe and a plurality of heating branch pipes; one end of the heating main pipe is connected with a branch water outlet interface of the water collector and distributor, and the other end of the heating main pipe is connected with a water return interface of the water collector and distributor; input ends of the plurality of heating branch pipes are connected with a plurality of water outlet openings of the heating main pipe one by one in a one-to-one correspondence; output ends of the plurality of heating branch pipes are connected with water return openings of the heating main pipe one by one in a one-to-one correspondence; branch pipe temperature sensing sheets are arranged on the plurality of heating branch pipes on each of the heating pipelines at intervals, and inter-pipe temperature sensing sheets are arranged between the plurality of heating branch pipes.
[0019] The water heating system of the offshore concrete gravity type oil and gas platform, wherein the plurality of heating branch pipes on each of the heating pipelines are pre-buried in corresponding wall bodies.
[0020] The water heating system of the offshore concrete gravity type oil and gas platform, wherein the branch pipe temperature sensing sheets are wrapped on the heating branch pipes and are sleeved with protective sleeve pipes; and the inter-pipe temperature sensing sheets are wrapped on the steel bars of the wall plates and are sleeved with protective sleeve pipes.
[0021] The water heating system of the offshore concrete gravity type LNG receiving platform has the following characteristics: sea water is taken as a heating medium nearby, which not only reduces the cost, but also makes the temperature of the concrete structure above 5℃, avoids freeze-thaw damage of the concrete structure in a severe cold environment, guarantees the safety of the oil and gas platform of the concrete structure, and prolongs the service life of the LNG receiving platform. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a longitudinal sectional view of the offshore concrete gravity type LNG receiving platform;
[0023] Figure 2 is a plan view of the offshore concrete gravity type LNG receiving platform;
[0024] Figure 3 is a structure block diagram of the water heating system of the offshore concrete gravity type LNG receiving platform of the utility model;
[0025] Figure 4 is a layout sectional view of each heating pipeline in the water heating system of the utility model;
[0026] Figure 5 is a layout plan view of each heating pipeline in the water heating system of the utility model. DETAILED DESCRIPTION
[0027] The utility model will be further described below in combination with the drawings.
[0028] Please refer to Figure 1 and Figure 2The water heating system of the offshore concrete gravity type LNG receiving platform is aimed at the flat cuboid box body of the LNG receiving platform and comprises an LNG storage tank 2, an SGC storage tank and a ballast tank.
[0029] The box body comprises a box body top plate 10, a box body bottom plate 11, a west outer wall 12, an east outer wall 13, a south end wall 14 and a north end wall 15; the interior of the box body is provided with a west longitudinal partition wall 16, an east longitudinal partition wall 17, a transverse partition wall 18 arranged between the middle part of the length of the west outer wall 12 and the middle part of the length of the east outer wall 13 and an upper bottom plate 19 arranged between the lower part of the west longitudinal partition wall 16 and the lower part of the east longitudinal partition wall 17;
[0030] The LNG storage tank 2 is surrounded by the west longitudinal partition wall 16, the middle part of the top plate 10, the east longitudinal partition wall 17, the upper bottom plate 19, the middle part of the south end wall 14 and the middle part of the north end wall 15; the LNG storage tank 2 is divided into a front LNG storage tank 2A and a rear LNG storage tank 2B by the transverse partition wall 18;
[0031] The SGC storage tank comprises a west SGC storage tank 3A and an east SGC storage tank 3B; wherein,
[0032] The west SGC storage tank 3A is surrounded by the west longitudinal partition wall 16, the west side of the top plate 10, the west outer wall 12, the west side of the south end wall 14 and the west side of the north end wall 15; the west SGC storage tank 3A is divided into a front west SGC storage tank and a rear west SGC storage tank by two transverse partition walls 18;
[0033] The east SGC storage tank 3B is surrounded by the east longitudinal partition wall 17, the east side of the top plate 10, the east outer wall 13, the east side of the south end wall 14 and the east side of the north end wall 15; the east SGC storage tank 3B is divided into a front east SGC storage tank and a rear east SGC storage tank by the transverse partition wall 18.
[0034] The ballast system comprises a middle ballast tank 40, a west ballast tank 41 and an east ballast tank 42; wherein,
[0035] The middle ballast tank 40 is surrounded by the upper bottom plate 19, the middle part of the caisson bottom plate 11, the lower part of the west longitudinal partition wall 16 and the lower part of the east longitudinal partition wall 17; four lower longitudinal partition walls 401 are arranged in the middle ballast tank 40, so that the middle ballast tank 40 is divided into five middle ballast tank units;
[0036] The west ballast tank 41 is located outside the west outer wall 12 and is surrounded by the west outer wall 12, a west end top plate 411, a west end outer wall 412, a west end bottom plate 413, a west south end plate 414 and a west north end plate 415; the west end bottom plate 413 is integrally extended outward from the west end of the box body bottom plate 11;
[0037] The east ballast tank 42 is located outside the east outer wall 13 and is surrounded by the east outer wall 13, an east end top plate 421, an east end outer wall 422, an east end bottom plate 423, an east-south end plate 424 and an east-north end plate 425; the east end bottom plate 423 is integrally extended outward from the east end of the tank bottom plate 11.
[0038] The height of the left end top plate 411 is the same as the height of the right end top plate 421 and is lower than the height of the caisson top plate 10.
[0039] Please refer to Figures 3 to 5 and refer to Figure 1 and Figure 2 The water heating system of the offshore concrete gravity type LNG receiving platform comprises a water pump 100, a seawater pool 200, a seawater desalination device 300, a freshwater pool 400, a heating device 500, a water collecting and distributing device 600 and a heating pipeline, which are connected in sequence; wherein,
[0040] The water pump 100, the seawater desalination device 300, the heating device 500 and the water collecting and distributing device 600 are arranged between the middle parts of the two transverse bulkheads 18; the seawater pool 200 utilizes two middle ballast tank units on the east side of the middle ballast tank 40; the freshwater pool 400 utilizes two middle ballast tank units on the west side of the middle ballast tank 40.
[0041] A temperature controller 600A is installed on each branch water outlet interface of the water collecting and distributing device 600;
[0042] The heating pipeline comprises a top plate heating pipeline 700, a bottom plate heating pipeline 701, a west outer wall heating pipeline 702, an east outer wall heating pipeline 703, a south end wall heating pipeline 704 and a north end wall heating pipeline 705;
[0043] Each heating pipeline comprises a heating main pipe 70A and a plurality of heating branch pipes 70B; one end of the heating main pipe 70A is connected with a branch water outlet interface of the water collecting and distributing device 600, and the other end of the heating main pipe 70A is connected with a backwater interface of the water collecting and distributing device 600; the plurality of heating branch pipes 70B are pre-buried in the corresponding wall body at intervals, the input ends of the plurality of heating branch pipes 70B are connected with a plurality of water outlets of the heating main pipe 70A one by one in a corresponding manner; the output ends of the plurality of heating branch pipes 70B are connected with backwater outlets of the heating main pipe 70A one by one in a corresponding manner; a branch pipe temperature sensing sheet 70C is arranged on each of the plurality of heating branch pipes 70B at intervals; the branch pipe temperature sensing sheet 70C is covered on the heating branch pipe 70B and is sleeved with a protective sleeve; an inter-pipe temperature sensing sheet 70D is arranged between the plurality of heating branch pipes 70B; the inter-pipe temperature sensing sheet 70D is covered on the steel bars of the wall body and is sleeved with a protective sleeve.
[0044] The working principle of the water heating system of the offshore concrete gravity type LNG receiving platform is as follows: the seawater around the platform is first pumped into the seawater pool 200 by the water pump 100, then is desalinated by the seawater desalination device 300 and pumped into the freshwater pool 400, the desalinated water is heated by the heating device 500, and then enters the main pipeline by the water collector and distributor 600, and is then distributed to the top plate heating pipeline 700, the bottom plate heating pipeline 701, the west outer wall heating pipeline 702, the east outer wall heating pipeline 703, the south end wall heating pipeline 704 and the north end wall heating pipeline 705. The pipelines of the water pump 100, the heating device 500 and the water collector and distributor 600 are all provided with stop valves at the roots, so that the opening and closing control is facilitated. The branch pipe temperature sensing sheet 70C and the pipe interval temperature sensing sheet 70D are used to measure the temperature of the wall body and feed back to the temperature controller 600A on the shunt water outlet interface of the corresponding water collector and distributor 600, so that the proportion of hot and cold water flowing out of the corresponding shunt water outlet interface is adjusted by the temperature controller 600A.
[0045] The above embodiments are only used for illustrating the utility model, and are not limited to the utility model. Those skilled in the art can make various transformations or modifications without departing from the spirit and scope of the utility model. Therefore, all equivalent technical solutions should belong to the scope of the utility model, and should be limited by the claims.
Claims
1. A water heating system for a marine concrete gravity type LNG receiving platform, the LNG receiving platform being a flat cuboid tank and comprising an LNG storage tank, an SGC storage tank and a ballast tank; the tank comprising a tank top plate, a tank bottom plate, a west outer wall, an east outer wall, a south end wall and a north end wall; inside the tank, a west longitudinal partition wall, an east longitudinal partition wall and an upper bottom plate arranged between the lower part of the west longitudinal partition wall and the lower part of the east longitudinal partition wall; the LNG storage tank being enclosed by the west longitudinal partition wall, the top plate, the east longitudinal partition wall, the upper bottom plate, the south end wall and the north end wall; the SGC storage tank comprising a west SGC storage tank and an east SGC storage tank; the west SGC storage tank being enclosed by the west longitudinal partition wall, the west side of the top plate, the west outer wall, the west side of the south end wall and the west side of the north end wall; the east SGC storage tank being enclosed by the east longitudinal partition wall, the east side of the top plate, the east outer wall, the east side of the south end wall and the east side of the north end wall; two transverse partition walls are arranged between the middle part of the length of the west outer wall and the middle part of the length of the east outer wall, so that the LNG storage tank, the west SGC storage tank and the east SGC storage tank are all divided into a front LNG storage tank, a rear LNG storage tank, a front west SGC storage tank, a rear west SGC storage tank, a front east SGC storage tank and a rear east SGC storage tank; the west longitudinal partition wall and the east longitudinal partition wall are both double-layer wall structures; the ballast tank comprising a middle ballast tank, a west ballast tank and an east ballast tank; wherein, the middle ballast tank is enclosed by the upper bottom plate, the middle part of the tank bottom plate, the lower part of the west longitudinal partition wall, the lower part of the east longitudinal partition wall, the middle lower part of the south end plate and the middle lower part of the north end plate; the middle ballast tank is divided into five middle ballast tank units by arranging four lower longitudinal partition walls inside the middle ballast tank; the longitudinal section of the west ballast tank and the longitudinal section of the east ballast tank are both rectangular and have the same size; the west ballast tank is located outside the west outer wall and is enclosed by the west outer wall, a west end top plate, a west end outer wall, a west end bottom plate, a west south end plate and a west north end plate; the west end bottom plate is integrally extended outward from the west end of the tank bottom plate; the east ballast tank is located outside the east outer wall and is enclosed by the east outer wall, an east end top plate, an east end outer wall, an east end bottom plate, an east south end plate and an east north end plate; the east end bottom plate is integrally extended outward from the east end of the tank bottom plate; the height of the west end top plate and the height of the east end top plate are the same and lower than the height of the tank top plate; characterized in that the water heating system comprises a water pump, a seawater pool, a seawater desalination device, a freshwater pool, a heating device, a water collecting and distributing device and a heating pipeline connected in sequence; the water pump, the seawater desalination device, the heating device and the water collecting and distributing device are all arranged between the middle parts of the two transverse partition walls; the seawater pool utilizes two middle ballast tank units on the east side of the middle ballast tank; the freshwater pool utilizes two middle ballast tank units on the west side of the middle ballast tank; a temperature controller is installed on each branch outlet interface of the water collecting and distributing device; the heating pipeline comprises a top plate heating pipeline, a bottom plate heating pipeline, a west outer wall heating pipeline, an east outer wall heating pipeline, a south end wall heating pipeline and a north end wall heating pipeline. Each of the heating pipelines comprises a heating main pipe and a plurality of heating branch pipes; one end of the heating main pipe is connected with a branch water outlet interface of the water collector and distributor, and the other end of the heating main pipe is connected with a water return interface of the water collector and distributor; input ends of the plurality of heating branch pipes are connected with a plurality of water outlet interfaces of the heating main pipe one by one; output ends of the plurality of heating branch pipes are connected with water return interfaces of the heating main pipe one by one; branch pipe temperature sensing sheets are arranged on the plurality of heating branch pipes on each of the heating pipelines at intervals, and inter-pipe temperature sensing sheets are arranged between the plurality of heating branch pipes.
2. The water heating system of a concrete offshore gravity type LNG receiving platform according to claim 1, characterized in that, The plurality of heating branch pipes on each of the heating pipelines are pre-buried in corresponding wall bodies.
3. The water heating system for an offshore concrete gravity type LNG receiving platform according to claim 1, characterized in that, The branch pipe temperature sensing sheets are wrapped on the heating branch pipes and are sleeved with protective sleeve pipes; and the inter-pipe temperature sensing sheets are wrapped on the steel bars of the wall plates and are sleeved with protective sleeve pipes.