CN216798581U

CN216798581U - LNG loading and unloading wharf fire extinguishing system

Info

Publication number: CN216798581U
Application number: CN202220410902.2U
Authority: CN
Inventors: 魏金玲; 汉雪梅; 马啸笛; 张建营; 任继明
Original assignee: Huludao Guohua Energy Equipment Group Co ltd
Current assignee: Huludao Guohua Energy Equipment Group Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-06-24
Anticipated expiration: 2032-02-28

Abstract

The utility model relates to an LNG loading and unloading wharf fire-fighting system, which comprises a wharf front water curtain spraying mechanism, a wharf operating platform water mist spraying mechanism and an escape passage water mist spraying mechanism, wherein an isolation water curtain wall is formed between an operating platform and a ship by the wharf front water curtain spraying mechanism in a spraying state; the spraying surface area of the water mist spraying mechanism of the wharf operating platform covers all valves and condensate tanks of the operating platform; the spraying area of the escape passage water mist spraying mechanism is larger than the width of the escape passage; the escape passage ground is also provided with a water accumulation area; the utility model has the triple functions of isolating fire points, cooling and protecting facilities and establishing a spraying life line, and achieves the purpose of simultaneously ensuring personal and property safety.

Description

LNG loading and unloading wharf fire extinguishing system

Technical Field

The utility model relates to a safety fire-fighting facility of an LNG loading and unloading wharf, in particular to a fire-fighting system of the LNG loading and unloading wharf.

Background

The LNG receiving station is 5 kilometers away from the coast, and the receiving station is connected with the land area through an approach embankment. The berth of the LNG wharf and the working wharf are arranged in two directions and are arranged in a straight shape, a loading and unloading arm, an operating platform, a boarding ladder, a pipeline, a channel and the like are arranged on the LNG berth working platform, the operating platform is of a steel structure and is divided into 4 layers, and condensate tanks are arranged in 1 layer; the main operation face is on 2 layers, and the distribution has valve and switch board, and 3 layers and 4 layers are arranged and are had supplementary facilities such as sweeping, letting congeal, and the steel stair is arranged to operation platform one side, and the staff can be followed the steel stair sparse. After the LNG ship is in butt joint with the loading and unloading arm, materials are collected to the header pipe through the branch pipes respectively through the liquid-phase unloading arm through the conveying pump on the LNG ship, and are conveyed to the LNG storage tank through the liquid-phase header pipe. Liquefied Natural Gas (LNG) terminals are important locations for loading, unloading and transporting liquefied natural gas, and if flammable mixtures diffuse to the fire source and are within explosive limits, they will immediately explode and flash back into the leak as soon as the natural gas leaks into the air during loading and unloading. Since the gas will leak continuously, the fire will continue to burn at the leak. The liquefied natural gas sprayed from the container is combusted in a large space, the pressure in the container is increased by the huge heat generated by combustion, the strength of the metal shell of the container is reduced by the hot high temperature, and larger leakage and even destructive explosion can be caused.

Among the prior art, a fire control facility for pier is mainly at pier installation alarm system and fire gun, through alarm system monitoring fire, leads to the fire gun fixed point and puts out a fire, nevertheless to the conflagration that the easy fuel ware arouses, the condition of a fire enlarges very rapidly, and the fire gun is expensive, and the water spray scope is limited.

For the situation of fire of liquefied natural gas, timely and safe evacuation of people is the first task, and therefore, creating an escape channel after a large-scale fire is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving the above-mentioned problems, thereby providing a fire fighting system that protects equipment while ensuring personnel to evacuate the fire.

The utility model solves the problems and adopts the technical scheme that:

a fire fighting system for an LNG loading and unloading wharf comprises a wharf front water curtain spraying mechanism, a wharf operating platform water mist spraying mechanism and an escape passage water mist spraying mechanism, wherein the wharf front water curtain spraying mechanism comprises a water curtain spray head and a first water mist spray head, the nozzle of the water curtain spray head faces upwards, sprayed water is a fan-shaped water curtain, and the water curtains of the water curtain spray heads are mutually overlapped; the first water mist spray head has downward nozzles and crossed spray widths; a water curtain partition wall is formed between the operating platform and the ship parked under the spraying state of the wharf front water curtain spraying mechanism; the wharf operating platform water mist spraying mechanism comprises a plurality of second water mist spray heads which are uniformly arranged above the operating platform, and the spraying amplitudes of all the second water mist spray heads are mutually crossed to cover all valves and condensate tanks of the operating platform; the escape passage water mist spraying mechanism comprises a third water mist spray head arranged along the escape passage, and the spraying amplitude of the third water mist spray head is larger than the width of the escape passage; the wharf front edge water curtain spraying mechanism, the wharf operating platform water mist spraying mechanism and the escape passage water mist spraying mechanism are respectively provided with a water supply pipeline, and the water supply pipeline of the wharf front edge water curtain spraying mechanism, the wharf operating platform water mist spraying mechanism and the escape passage water mist spraying mechanism are connected with the rain-spraying valve group.

Compared with the prior art, the utility model adopting the technical scheme has the beneficial effects that:

the utility model isolates the upper part and the lower part of the wharf which can have more serious consequences if the fire spreads through three spraying systems with different purposes and different functions; on one hand, the device extinguishes and cools the facilities on the wharf, on the other hand, a life line is constructed for workers by using spray water, the workers are guaranteed to escape from the scene safely, and the purpose of guaranteeing personal and property safety simultaneously is achieved.

Preferably, the further technical scheme of the utility model is as follows:

the water supply line of the wharf front-edge water curtain spraying mechanism is a main pipe, the initial section of the main pipe is connected with the rain-spraying valve group, the tail section is provided with a water curtain nozzle and a water mist nozzle, the tail section is fixed on the front-edge stand column of the operating platform, and the distance between the water curtain nozzle and the water mist nozzle is 1000 mm. The fire-isolating spraying part of the water curtain adopts a thicker main pipe to directly connect a water source and a spray head, so that fire-fighting water is sufficiently conveyed, and a water curtain isolating surface is ensured to be formed.

The water supply pipeline of the wharf operating platform water mist spraying mechanism is composed of a second main pipe and a second branch pipe, the second main pipe is connected with the rain valve group, the second branch pipe is arranged above the operating platform, and a second water mist spray head is installed on the lower side of the second branch pipe. No. two branch pipes form the pipe network above operation platform in this structure, by the whole water supply of being responsible for, are convenient for the management and control water spray.

The water supply pipeline of the escape passage water mist spraying mechanism consists of a third main pipe and a third branch pipe; the lower part of the escape passage is provided with a pipeline bracket for fixing a third main pipe, and the top of the guardrail is provided with a fixed support for fixing a third branch pipe; the third water mist spray head is arranged at the position of the escape passage with the top raised by 2.5 meters. The third water smoke shower nozzle sets up the position height in this structure, and the area covered of single shower nozzle is increased, can cover whole passageway.

The ground of the escape passage is provided with water accumulation areas, the water accumulation areas are arranged at intervals of 20 meters, and the length of each water accumulation area is 2-3 meters. The depth of the water accumulation area in the scheme does not influence the passing of personnel, and spray water can be accumulated to form a shallow water pit, so that the cooling water for escape personnel can be supplemented when the fire is too large, the spray water is evaporated too fast or a spray head fails.

Drawings

FIG. 1 is a schematic view of the arrangement of the wharf in a downward-looking structure of the present invention;

FIG. 2 is a schematic elevation view of the present invention;

FIG. 3 is a schematic view of the water spraying form of the wharf front water curtain spraying mechanism;

FIG. 4 is a structural view of an escape route according to the present invention;

FIG. 5 is a schematic view of a water mist spraying mechanism of the wharf operating platform of the utility model;

FIG. 6 is a schematic view of the arrangement structure of the water accumulation area according to the present invention.

In the figure: 1. a dock; 2. an operating platform; 2-1, upright columns; 3. an escape passage; 4. a wharf frontage water curtain spraying mechanism; 4-1, a first main pipe; 4-2, a support frame; 5. a water curtain spray head; 6. a first water mist spray head; 7. a water mist spraying mechanism of the wharf operating platform; 7-1, second main pipe; 7-2, branch pipe II; 8. a second water mist spray head; 9. a water mist spraying mechanism of the escape passage; 9-1, number three main tube; 9-2, branch pipe III; 9-3, a pipeline bracket; 9-4, fixing a bracket; 10. a third water mist spray head; 11. a deluge valve set; 12. a dock fire water source; 13. a water accumulation area.

Detailed Description

The utility model will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the utility model.

Referring to fig. 1 to 6, the LNG loading and unloading terminal fire fighting system provided by the present invention comprises a wharf front water curtain spraying mechanism 4, a wharf operation platform water mist spraying mechanism 7 and an escape passage 3 water mist spraying mechanism, wherein: the wharf front water curtain spraying mechanism 4 comprises a water curtain spray head 5 and a first water mist spray head 6, the nozzle of the water curtain spray head 5 is upward, the sprayed water is a fan-shaped water curtain, and the spray amplitudes of the water curtain spray heads 5 are mutually overlapped; the first water mist spray head 6 has downward nozzles and spray widths which are mutually crossed. And a water curtain partition wall is formed between the operating platform 2 and the ship parked under the spraying state of the wharf front water curtain spraying mechanism 4. The wharf front water curtain spraying mechanism 4 further comprises a first main pipe 4-1 for supplying fire water and a support frame 4-2 arranged on the operation platform upright post 2-1. The middle parts of the upright columns 2-1 in front of the operation platform 2 are fixed with support frames 4-2, and pipeline sections of a water curtain spray head 5 and a first water mist spray head 6 are fixedly arranged on the support frames 4-2. The water curtain partition wall is perpendicular to the ground. The spray heads in the wharf front water curtain spraying mechanism 4 can be one row or multiple rows. The purpose is to isolate the quay 1 from the vessel below the quay 1. If the operation platform 2 on the wharf 1 is on fire, the water curtain of the wharf front water curtain spraying mechanism 4 can effectively isolate high heat, so that the fire is prevented from spreading to a ship below the wharf 1, and vice versa.

Referring to fig. 5, the wharf operating platform water mist spraying mechanism 7 comprises a plurality of second water mist spray nozzles 8 which are uniformly arranged above the operating platform 2, and the spraying widths of all the second water mist spray nozzles 8 are mutually crossed to cover all valves and condensate tanks of the operating platform 2.

Referring to fig. 4, the escape route water mist spray mechanism 9 includes a third water mist spray head 10 arranged along the escape route 3, and the spray width of the third water mist spray head 10 is larger than the width of the escape route 3. The escape passage 3 comprises a pedal, guardrails are arranged on two sides of the pedal, and the whole escape passage is a steel structure frame. The lower part of the escape passage 3 is provided with a pipeline bracket 9-3 for fixing a third main pipe 9-1, and the top of the guardrail is provided with a fixed support 9-4 for fixing a third branch pipe 9-2; the third water mist spray head 10 is arranged at the position of 2.5 m higher than the top of the escape passage 3. The third water mist nozzles 10 are arranged at intervals of 1200mm, and are preferably arranged at the middle position of the top of the escape channel 3.

The wharf front water curtain spraying mechanism 4, the wharf operating platform water mist spraying mechanism 7 and the escape passage water mist spraying mechanism 9 are respectively provided with water supply pipelines, and the water supply pipelines of the wharf front water curtain spraying mechanism 4, the wharf operating platform water mist spraying mechanism 7 and the escape passage water mist spraying mechanism 9 are connected with the rain valve set 11. The deluge valve group 11 links to each other with pier fire water source 12, and the deluge valve group 11 sets up in the position of keeping away from the pier, can control water yield or continuous water source outside the scene of a fire.

The following is a detailed description of the specific structure of the three spraying mechanisms:

a water supply pipeline of the wharf front water curtain spraying mechanism 4 is a first main pipe 4-1 of DN200, the initial section of the first main pipe 4-1 is connected with the rain-spraying valve group 11, the tail section of the first main pipe 4-1 is a pipe section for arranging the water curtain spray heads 5, the pipe section is provided with a threaded joint every 1000mm, and the threaded joint is provided with the water curtain spray heads 5 and the first water mist spray heads 6.

A water supply pipeline of the water mist spraying mechanism 7 of the wharf operating platform consists of a DN150 second main pipe 7-1 and a DN50 second branch pipe 7-2. The second main pipe 7-1 is connected with the deluge valve group 11, the second branch pipe 7-2 is arranged above the operating platform 2, and the lower side of the second branch pipe 7-2 is provided with a second water mist spray head 8. The second branch pipe 7-2 forms a pipe network above the operation platform 2. And the spray heads are correspondingly arranged according to the concentration of the valves and the condensate tanks below the pipe network. And a screwed joint is also arranged on the lower side of the second branch pipe 7-2 and is used for mounting a second water mist spray head 8.

A water supply pipeline of the escape passage water mist spraying mechanism 9 consists of a third main pipe 9-1 and a third branch pipe 9-2. The third main pipe 9-1 is arranged along the escape passage 3 and is arranged at the lower part of the escape passage. Threaded joints are uniformly arranged on the third main pipe 9-1 and connected with the third branch pipes 9-2, and each third branch pipe 9-2 extends above the escape passage. In order to fix the escape passage, a fixing bracket is also arranged to fix the vertical third branch pipe 9-2. The third main tube DN150 and the third branch tube DN 50. The third water mist spray heads 10 are continuously arranged from the part above the operation platform 2 to two sides along the escape passage 3 and are continuously arranged outside the range of the wharf 1. The water mist spraying mechanism 9 of the escape passage enables the escape passage 3 to be a water protective belt and sends workers to a safety area in a fire scene.

Further, referring to fig. 6, the escape passage 3 is further provided with a water accumulation area 13 on the ground. The water accumulation zone 13 may be a shallow pit with a height difference of 1cm to 3cm from the ground. The shallow pits are equal to the channel width. One at intervals of 20 meters. The length of the water accumulation area 13 is 2-3 meters. The water accumulation area 13 can accumulate the spray water, and if the fire is too large or the spray water is not enough to support the safe temperature, the escape personnel can roll in the pit for a circle when passing through the water accumulation area 13, so that the body is completely soaked. Preferably, the length of the transition slope of the catchment area 13 and the ground is 75cm, which is about the distance of one step, so that people can not obviously feel the height difference during the escape process, and the trip is avoided.

The utility model has the beneficial effects that:

this technical scheme sets up the protection of fire sprinkler system to the whole pier of LNG, and the pier front edge adopts the water curtain system, and operation platform district and LNG condensate tank and escape way adopt the water smoke system, carry out all-round fire sprinkler protection to whole pier, guarantee evacuation of staff, fire fighter's rescue and the control and the putting out of conflagration when taking place the conflagration.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.

Claims

1. The utility model provides a LNG loading and unloading pier fire extinguishing systems which characterized in that: spray mechanism (4), pier operation platform water smoke by the pier front water curtain and spray mechanism (7) and escape way water smoke and spray mechanism (9) and constitute, wherein:

the wharf front water curtain spraying mechanism (4) comprises a water curtain spray head (5) and a first water mist spray head (6), the nozzle of the water curtain spray head (5) is upward, sprayed water is a fan-shaped water curtain, and the water curtains of the water curtain spray heads (5) are mutually overlapped; the first water mist spray head (6) has downward nozzles and crossed spray amplitude; a water curtain partition wall is formed between the operation platform (2) and the ship parked under the spraying state of the wharf front water curtain spraying mechanism (4);

the wharf operating platform water mist spraying mechanism (7) comprises a plurality of second water mist spray heads (8) which are uniformly arranged above the operating platform (2), and spray amplitudes of all the second water mist spray heads (8) are mutually crossed to cover all valves and condensate tanks of the operating platform (2);

the escape passage water mist spraying mechanism (9) comprises a third water mist spray head (10) arranged along the escape passage (3), and the spray amplitude of the third water mist spray head (10) is greater than the width of the escape passage;

the wharf front water curtain spraying mechanism (4), the wharf operating platform water mist spraying mechanism (7) and the escape channel water mist spraying mechanism (9) are respectively provided with a water supply pipeline, and the water supply pipeline of the wharf front water curtain spraying mechanism, the wharf operating platform water mist spraying mechanism and the escape channel water mist spraying mechanism are connected with the rain valve group (11).

2. The LNG loading dock fire protection system of claim 1, wherein: a water supply pipeline of the wharf front edge water curtain spraying mechanism (4) is a main pipe (4-1), the initial section of the main pipe (4-1) is connected with the rain valve group (11), the tail section of the main pipe is provided with a water curtain spray head (5) and a first water mist spray head (6), the tail section of the main pipe is fixed on an upright post (2-1) of the operation platform (2), and the distance between the water curtain spray head (5) and the first water mist spray head (6) is 1000 mm.

3. The LNG loading dock fire protection system of claim 1, wherein: a water supply pipeline of the wharf operating platform water mist spraying mechanism (7) is composed of a second main pipe (7-1) and a second branch pipe (7-2), the second main pipe (7-1) is connected with a rain valve group (11), the second branch pipe (7-2) is arranged above the operating platform (2), and a second water mist spray head (8) is installed on the lower side of the second branch pipe (7-2).

4. The LNG loading dock fire protection system of claim 1, wherein: a water supply pipeline of the escape passage water mist spraying mechanism (9) consists of a third main pipe (9-1) and a third branch pipe (9-2); the lower part of the escape channel (3) is provided with a pipeline bracket (9-3) for fixing a third main pipe (9-1), and the top of the guardrail of the escape channel is provided with a fixed support (9-4) for fixing a third branch pipe (9-2); the third water mist spray head (10) is arranged at the position of the escape passage (3) with the top raised by 2.5 meters.

5. The LNG loading dock fire protection system of claim 1, wherein: the ground of the escape passage (3) is also provided with a water accumulation area (13), the water accumulation area (13) is arranged at intervals of 20 meters, and the length of the water accumulation area (13) is 2-3 meters.