CN214940894U

CN214940894U - Detachable stainless steel LNG leakage accident liquid collecting tank structure

Info

Publication number: CN214940894U
Application number: CN202120492988.3U
Authority: CN
Inventors: 伍尚乐; 李恬; 麦浩荣; 李静波
Original assignee: CCCC FHDI Engineering Co Ltd
Current assignee: CCCC FHDI Engineering Co Ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2021-11-30
Anticipated expiration: 2031-03-08

Abstract

The utility model discloses a detachable stainless steel LNG leakage accident liquid collecting tank structure, which comprises an LNG collecting chamber and a guide groove for guiding leaked LNG, wherein the LNG collecting chamber is provided with a rainwater drainage component, a high expansion foam system and a low temperature detector; the LNG collection room is the LNG collection room that adopts the uncovered formula overall structure that the stainless steel made, and the LNG collection room is installed through a plurality of removable fastening components and is formed detachable construction on the cold bridge blocks the subassembly. The utility model discloses an integral LNG collection room of stainless steel preparation is as main collecting tank, and it can carry out the unit mount, dismantle and transport to solved the LNG leakage accident collecting tank that tradition adopted concrete to make effectively and had the unable dismantlement, the structure is overstaffed, heavy, cost is high, be difficult to upgrade and reform transform the scheduling problem.

Description

Detachable stainless steel LNG leakage accident liquid collecting tank structure

Technical Field

The utility model relates to a supporting facility construction technical field in harbour especially relates to an accident collecting tank structure is leaked to LNG.

Background

At present, in the production process in the field of LNG and oil and gas terminals, aiming at preventing LNG leakage danger, a large-volume LNG leakage accident concrete liquid collecting tank needs to be configured in the design of the LNG terminal so as to reduce the possibility of possible fire and explosion danger during LNG leakage. Meanwhile, a high expansion foam system needs to be arranged in the LNG liquid collecting tank, and high expansion foam is used for covering, so that the possibility of fire and explosion hazards is further reduced.

The dangerous materials are simply isolated, diffusion is prevented, centralized processing is facilitated, and therefore the LNG leakage accident liquid collecting tank is arranged in an area far away from personnel operation areas. If an LNG leakage accident happens, leaked LNG is drained into the accident liquid collecting pool through the guide groove so as to prevent the leaked LNG from overflowing everywhere. Simultaneously, when the low temperature detector detects that there is low temperature LNG in collecting the liquid pool, the high multiple foam system in the liquid pool can be automatic to the mixed liquid of spraying high multiple foam in the collection pool, makes its safety gasification. In addition, according to the design of fire control requirement, the collecting tank is open generally, and open-air arrangement is linked together with the drainage system of whole operation platform. When it rains, rainwater can be stored in the rainwater tank and can be discharged through the explosion-proof liquid level control immersed pump.

However, in the conventional LNG terminal project, the LNG leakage accident liquid collecting tank is made of concrete and is completely fixed on the side surface of the terminal, so that the liquid collecting tank cannot be moved, which means that the arrangement or the use performance of the liquid collecting tank is difficult to realize once technical upgrading and reconstruction are carried out in the future. In addition, the concrete collecting tank is bulky and heavy, so that the wharf structure is not heavy, and it is difficult to install the LNG collecting tank which is bulky in volume and heavy in weight in a suspension manner.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is, to the unable dismantlement of LNG leakage accident concrete collecting tank among the prior art, the structure is overstaffed, heavy, the high scheduling problem of cost, provide a structure simpler, LNG collects the room and can wholly dismantle the rotation, can improve the availability factor of collecting tank effectively, reduce the pier load, reduce the production cost of pier and collecting tank and production efficiency's removable stainless steel LNG leakage accident collecting tank structure simultaneously.

In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides a removable stainless steel LNG leaks accident collecting tank structure, its is close to the construction of pier platform, collects the room and is used for the drainage to leak the guide way of LNG including LNG, is provided with row rainwater subassembly, high expansion foam system and low temperature detector in the LNG collection room, its characterized in that: the LNG collection room is collected for the open type overall structure's that adopts the stainless steel to make LNG collection room, and LNG collection room forms detachable construction through a plurality of removable fastening components installation on the cold bridge blocks the subassembly.

Further, the LNG weir is included, the guide groove is butted against the LNG weir, the LNG weir is adjacent to the LNG collecting chamber, and a channel which can overflow leaked LNG to the LNG collecting chamber is arranged between the LNG weir and the LNG collecting chamber.

Further, still including the rainwater weir, the rainwater weir is adjacent with the LNG weir, and the baffle between the two is provided with the rainwater hole near the position of bottom to make rainwater weir and LNG weir be linked together.

Further, still including the bracket component, the cold bridge blocks the subassembly and installs on the bracket component, and room, LNG weir and rainwater weir are collected to the LNG and are installed on the bracket component through removable fastening component respectively to block the subassembly through the cold bridge and separate the three with the bracket component respectively.

Furthermore, arrange the rainwater subassembly and set up in the below of LNG collection room, it is through the bottom intercommunication of a plurality of inlet tubes and LNG collection room, arrange the total row mouth department of rainwater subassembly and be provided with the stock butterfly valve as drainage control mechanism. The long rod butterfly valve with a simple structure is used for replacing an explosion-proof liquid level control immersed pump, so that the service efficiency of the liquid collecting tank can be effectively improved, the wharf load is reduced, and meanwhile, the production cost and the production efficiency of the wharf and the liquid collecting tank are reduced.

Furthermore, a ladder assembly is arranged on the wharf platform, and the LNG collection chamber and the LNG weir correspond to one group of ladder assemblies so that operators can conveniently enter and exit the wharf platform to carry out equipment installation and maintenance.

Preferably, the guide groove is movably connected with the LNG weir, so that the joint is prevented from being pulled to be cracked when the wharf is displaced; the inclination of the guide groove was 0.002.

Furthermore, the distance between the rainwater hole and the bottom of the LNG weir is 200mm, accumulated water exceeding the rainwater hole is stored in the LNG weir, and the water seal is guaranteed to be frozen when LNG leaks.

Preferably, the height of the partition between the LNG weir and the rainwater weir is the same as that of the liquid collecting tank, and the overflow height of the rainwater weir is half of that of the liquid collecting tank; the height of the partition between the LNG weir and the LNG collecting chamber is 1/5-1/3, the formed gap is an overflow channel for leaking LNG, and the flow area of the gap of the overflow channel is ensured to be sufficient.

Preferably, the installation horizontal deviation of the cold bridge blocking assembly is axial L/1000 and radial 2D/1000.

The utility model discloses an integral LNG collection room of stainless steel preparation is as main collecting tank, and it can carry out the unit mount, dismantle and transport to solved the LNG leakage accident collecting tank that tradition adopted concrete to make effectively and had the unable dismantlement, the structure is overstaffed, heavy, cost is high, be difficult to upgrade and reform transform the scheduling problem. By configuring the LNG weir and the rainwater weir, the function of the whole facility is more complete. In addition, the long rod butterfly valve with a simple structure is adopted to replace an explosion-proof liquid level control immersed pump, so that the use efficiency of the liquid collecting tank can be effectively improved, the wharf load is reduced, and meanwhile, the production cost and the production efficiency of the wharf and the liquid collecting tank are reduced.

Drawings

Fig. 1 is a schematic elevation view of the present invention;

fig. 2 is a schematic plan view of the present invention;

fig. 3 is a schematic side view of the present invention.

In the figure, 1 is the guide way, 2 is the LNG weir, 3 is the rainwater weir, 4 is the LNG room of collecting, 5 is row rainwater subassembly, 6 is the stock butterfly valve, 7 is the cat ladder subassembly, 8 is the pier platform, 9 blocks the subassembly for the cold bridge, 10 is removable fastening components, 11 is the rainwater hole, 12 is the bracket component.

Detailed Description

The invention will be further explained by means of specific embodiments with reference to the accompanying drawings:

in this embodiment, referring to fig. 1-3, the detachable stainless steel LNG leakage accident liquid collecting tank structure is built near a dock platform 8, and includes an LNG collecting chamber 4 and a guide groove 1 for guiding leaked LNG, and the LNG collecting chamber 4 is provided with a rainwater drainage assembly 5, a high expansion foam system and a low temperature detector; LNG collects room 4 and is the LNG collection room that adopts the open type overall structure that the stainless steel made, and LNG collects room 4 and installs through a plurality of removable fastening components 10 and form detachable construction on cold bridge blocks subassembly 9.

The LNG weir 2 is further included, the guide groove 1 is butted against the LNG weir 2, the LNG weir 2 is adjacent to the LNG collection chamber 4, and a passage for overflowing leaked LNG to the LNG collection chamber 4 is formed between the LNG weir 2 and the LNG collection chamber.

Still including rainwater weir 3, rainwater weir 3 is adjacent with LNG weir 2, and the position that baffle between the two is close to the bottom is provided with rainwater hole 11 to make rainwater weir 3 be linked together with LNG weir 2.

Still including bracket component 12, the cold bridge blocks subassembly 9 and installs on bracket component 12, and LNG collection room 4, LNG weir 2 and rainwater weir 3 are installed on bracket component 12 through removable fastening component 10 respectively to block subassembly 9 through the cold bridge and separate three and bracket component 12 respectively, play the effect of isolated cold volume transmission.

Arrange the rainwater subassembly 5 and set up in the below of LNG collection room 4, it is through the bottom intercommunication of a plurality of inlet tubes and LNG collection room 4, arrange the total row of mouth department of rainwater subassembly 5 and be provided with stock butterfly valve 6 as drainage control mechanism. The long-rod butterfly valve 6 with a simple structure is used for replacing an explosion-proof liquid level control immersed pump, so that the service efficiency of the liquid collecting tank can be effectively improved, the wharf load is reduced, and meanwhile, the production cost and the production efficiency of the wharf and the liquid collecting tank are reduced.

A ladder assembly 7 is arranged on the wharf platform 8, and the LNG collection chamber 4 and the LNG weir 2 are respectively provided with a corresponding group of ladder assemblies 7 so as to facilitate the access of operators for equipment installation and maintenance.

The guide groove 1 is movably connected with the LNG weir 2, so that the joint is prevented from being pulled to crack when the wharf is displaced; the inclination of the guide groove 1 was 0.002.

The distance from the rainwater hole 11 to the bottom of the LNG weir 2 is 200mm, accumulated water exceeding the rainwater hole 11 is stored in the LNG weir 2 to serve as water seal, and the water seal is guaranteed to be frozen when LNG leaks.

The height of a partition plate between the LNG weir 2 and the rainwater weir 3 is the same as that of the liquid collecting tank, and the overflow height of the rainwater weir 3 is half of that of the liquid collecting tank; the height of the partition between the LNG weir 2 and the LNG collection chamber 4 is the sump height 1/5, and the gap is the overflow channel for leaking LNG, and the flow area of the overflow channel gap is sufficient.

The installation horizontal deviation of the cold bridge blocking assembly 9 is axial L/1000 and radial 2D/1000.

Under normal conditions, the rainwater also can gather to LNG weir 2 from guide way 1, flows into rainwater weir 3 from rainwater hole 11 of bottom between LNG weir 2 and rainwater weir 3 again, and the rainwater in the rainwater weir 3 is gathered can automatic overflow after certain height and is arranged to the sea. Rainwater that directly falls into directly from directly over LNG collection room 4 in rainy day then passes through stock butterfly valve 6 reality row clean.

When an LNG leakage accident occurs, leaked LNG is gathered to the LNG weir 2 from the guide groove 1, the LNG at the temperature of-196 ℃ can be rapidly frozen into the water seal rainwater hole 11 at the bottom between the LNG weir 2 and the rainwater weir 3, and then the LNG directly overflows to the LNG collection chamber 4 after being gathered to a certain height at the LNG weir 2, so that the direct discharge in the sea is avoided. When LNG overflows to LNG collection room 4, when low temperature detection system detected that there is low temperature LNG in the LNG collection room 4, automatic spraying high multiple foam mixed liquid in to LNG collection room 4 makes its safety gasification.

In future technology upgrades, changes in layout and modifications to improve the technical performance are made by disconnecting the removable fastening assembly 10 and then lifting the LNG collection chamber 4 as a whole.

The above detailed description of the present invention is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereto, i.e. all equivalent changes and modifications made in accordance with the scope of the present invention should be covered by the present invention.

Claims

1. The utility model provides a removable stainless steel LNG leaks accident collecting tank structure, its is close to the construction of pier platform, collects the room and is used for the drainage to leak the guide way of LNG including LNG, is provided with row rainwater subassembly, high expansion foam system and low temperature detector in the LNG collection room, its characterized in that: the LNG collection room is collected for the open type overall structure's that adopts the stainless steel to make LNG collection room, and LNG collection room forms detachable construction through a plurality of removable fastening components installation on the cold bridge blocks the subassembly.

2. The removable stainless steel LNG leakage accident sump structure of claim 1, wherein: the LNG weir is abutted to the LNG weir, the LNG weir is adjacent to the LNG collection chamber, and a channel which can overflow leaked LNG to the LNG collection chamber is arranged between the LNG weir and the LNG collection chamber.

3. The removable stainless steel LNG leakage accident sump structure of claim 2, wherein: still including the rainwater weir, the rainwater weir is adjacent with the LNG weir, and the position that baffle between the two is close to the bottom is provided with the rainwater hole to make rainwater weir and LNG weir be linked together.

4. The removable stainless steel LNG leakage accident sump structure of claim 3, wherein: still including the bracket component, the cold bridge blocks the subassembly and installs on the bracket component, and room, LNG weir and rainwater weir are collected to the LNG installs on the bracket component through removable fastening component respectively to block the subassembly through the cold bridge and separate the three with the bracket component respectively.

5. The removable stainless steel LNG leakage accident sump structure of claim 1, wherein: arrange the rainwater subassembly and set up in the below of LNG collection room, it is through the bottom intercommunication of a plurality of inlet tubes and LNG collection room, arrange the total row mouth department of rainwater subassembly and be provided with the stock butterfly valve as drainage control mechanism.

6. The removable stainless steel LNG leakage accident sump structure of claim 2, wherein: a ladder assembly is arranged on the wharf platform, and the LNG collection chamber and the LNG weir correspond to one group of ladder assemblies.

7. The removable stainless steel LNG leakage accident sump structure of claim 2, wherein: the guide way and the LNG weir adopt movable connection, and the gradient of the guide way is 0.002.

8. The removable stainless steel LNG leakage accident sump structure of claim 3, wherein: the rainwater hole is 200mm apart from LNG weir bottom, has accumulated the ponding that surpasss the rainwater hole in the LNG weir.

9. The removable stainless steel LNG leakage accident sump structure of claim 3, wherein: the height of a partition plate between the LNG weir and the rainwater weir is the same as that of the liquid collecting pool, and the overflow height of the rainwater weir is half of that of the liquid collecting pool; the height of the partition between the LNG weir and the LNG collecting chamber is 1/5-1/3, and the formed gap is an overflow channel for leaking LNG.

10. The removable stainless steel LNG leakage accident sump structure of claim 1, wherein: the horizontal installation deviation of the cold bridge blocking assembly is axial L/1000 and radial 2D/1000.