CN-121987990-A - Fire extinguishing protection device

CN121987990ACN 121987990 ACN121987990 ACN 121987990ACN-121987990-A

Abstract

The invention provides a fire extinguishing protective device which comprises a base, a water mist sprayer and a foam curtain sprayer, wherein the water mist sprayer and the foam curtain sprayer are integrated on the base, the water mist sprayer is arranged above the foam curtain sprayer, the water mist sprayer is used for forming a mist protective layer, and the foam curtain sprayer is used for forming a foam curtain protective layer on the inner side of the mist protective layer. The invention can thoroughly block the damage of flame to the protection object, avoid the heat radiation of flame from penetrating through the fine water mist of the mist drop protection layer, and provide more effective protection for devices or equipment around the fire disaster.

Inventors

LANG XUQING
CHENG YIWEI
DANG WENYI
ZHANG RIPENG
WANG CHUN
Cui Piyu

Assignees

中国石油化工股份有限公司
中石化安全工程研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (12)

1. The fire extinguishing protective device comprises a base, and a water mist sprayer and a foam curtain sprayer which are both integrated on the base, wherein the water mist sprayer is arranged above the foam curtain sprayer, the water mist sprayer is used for forming a mist protective layer, and the foam curtain sprayer is used for forming a foam curtain protective layer on the inner side of the mist protective layer.
2. The fire suppression apparatus of claim 1, wherein the mist sprayer is capable of spraying droplets of multiple particle sizes.
3. The fire suppression apparatus of claim 2, wherein the water mist sprayer has two sets of first spray holes arranged in a row, and a plurality of second spray holes arranged in a row between the two sets of first spray holes, the first spray holes having a larger aperture than the second spray holes.
4. The fire suppression apparatus of claim 3 wherein said mist sprayer includes a spray tube and an orifice plate connected at the outlet of said spray tube, two sets of said first spray orifices being open at the uppermost and lowermost portions of said orifice plate, respectively.
5. The fire protection device according to claim 2, wherein the water mist sprayer has spray holes of a plurality of different apertures, the spray holes having different apertures are staggered, and the spray holes having the same aperture are provided in at least 4 rows, so that the sprays from each of the spray holes can cross each other to form a dense spray layer.
6. The fire protection device of claim 1, wherein the foam curtain ejector comprises a baffle plate, a main pipe and a plurality of branch pipes connected with the main pipe, the outlet ends of the branch pipes are provided with jet openings, a plurality of meshes are uniformly formed on the baffle plate, the jet openings face the baffle plate, and the ejected foam jet flows are in angular contact with the baffle plate.
7. The fire protection device of claim 6, wherein the number of the jet ports is not less than 4, and the sum of the cross-sectional areas of the jet ports is 80-90% of the cross-sectional area of the main pipe.
8. The fire protection device of claim 6, wherein the branch pipes are all mounted on a mounting frame, and the baffle is connected with the mounting frame through a support rod.
9. The fire suppression protection device of claim 6, wherein a surface of the baffle covers an injection range of all the injection ports.
10. The fire suppression apparatus of claim 1, further comprising a regulator coupled to the mist sprayer for adjusting the spray angle of the mist sprayer.
11. The fire protection device according to claim 1, wherein the water mist sprayer is connected with a fire-fighting liquid source through a first pipeline, the foam curtain sprayer is connected with a foam mixed liquid source through a second pipeline, a bracket perpendicular to the upper surface of the base is arranged on the base, and the bracket is respectively connected with the first pipeline and the second pipeline for supporting the first pipeline and the second pipeline.
12. The fire suppression apparatus of claim 11, wherein the fire fighting liquid has a fire suppression component dissolved therein.

Description

Fire extinguishing protection device Technical Field The invention relates to the technical field of fire-fighting equipment, in particular to a fire-extinguishing protection device. Background In petrochemical plant areas, when a fire occurs in a local place, high-temperature flame heat radiation generated causes high-temperature damage to facilities in the nearby surrounding areas, and if the fire is not extinguished in time, the fire is likely to be caused to catch fire in the devices or equipment in the nearby areas. Therefore, a certain heat protection means is needed, so that when a fire disaster occurs in a local area, heat protection can be rapidly implemented on other surrounding facilities needing protection, and damage to the facilities caused by high-temperature flame heat radiation is reduced or even avoided. Cooling water sprays, jet water or fine water mist protection is generally adopted around the combustion zone. The area adjacent to the flame is high in temperature, the fine water mist evaporates fast, a complete isolation barrier cannot be formed, the fine water mist is light in weight and near in range, can be dispersed under the action of hot air flow and is not suitable for a large-scale scene protected by a storage tank, in addition, the spraying pressure of the fine water mist is often more than 4MPa, the flow is low, the flow of single equipment is generally lower than 20L/s, the requirement of a fine water mist system on a fire pump is very high, and the fire-fighting application range is narrow and is not suitable for a large-scale fire-extinguishing scene. The water mist is generally used for protecting a single pump or personnel, the action range is below 10 square meters, the volume of a protected object is small, and the handheld type protection fire-fighting operation is adopted, for example, the flow rate of the water mist gun is 2-4L/S, and the effective range is 4-6m. The petrochemical device area is also cooled and isolated by adopting fixed pipe type spray water, fixed spray pipes are arranged around the protected object, the spray pipes are also sprayed in a porous mode, a large gap exists between spray holes, a water curtain cannot form a complete isolation layer, and high-temperature sensitive equipment cannot be protected, such as a spherical tank and the like. Flame heat radiation can act on the surface of equipment through pores among jet flows to form local high temperature, so that the equipment is in failure and fire protection is failed. Protection of equipment against fire sites lacks effective means. Existing foams are mainly used for fire suppression, not for insulation protection. At present, low-multiple foam and medium-multiple foam are mostly used, the flow range is large, the range can be realized at 20-100L/s, the range exceeds 30m, and the maximum range can reach 80m. The protective range is large, and the fire extinguishing agent is applied to the combustion oil surface in a foam jet mode to cover and extinguish fire, and the action mechanism is to isolate air and cooling liquid level. The low-multiple foam liquid and the medium-multiple foam liquid are foamed through the air suction type foam generator, when the foam mixed liquid flows through the spray hole of the foam generator at a high speed, local negative pressure is formed, air is taken in from the outside to form air foam in the foam mixed liquid, the volume of the foam expands 6-20 times after foaming, the specific surface area of a foam layer is increased, the thermal isolation blocking effect on flame is obvious, the viscosity of the foam layer is far greater than that of water, a planar protection layer is easy to form, but the foam is generally used for covering and protecting a horizontal plane, the foam layer cannot be attached to the vertical surface of equipment for a long time, the foam layer can slide off from the vertical surface quickly under the action of gravity, the thermal protection on the vertical surface of equipment is difficult, the protection technology and equipment on the vertical surface of equipment are not used for heat insulation protection at present, the foam is applied in a jet flow mode at present, and related equipment and technology are not available in the aspect of heat insulation surface. Disclosure of Invention One object of the invention is to provide a fire extinguishing protection device, which forms a mist protection layer through a mist sprayer, eliminates flame outside the mist protection layer, reduces flame volume and flame heat radiation, forms a foam curtain protection layer with a certain thickness inside the mist protection layer through a foam curtain sprayer, performs vertical plane protection together, thoroughly blocks the damage of flame to a protection object, prevents the heat radiation of the flame from penetrating through a fine water mist body of the mist protection layer, and provides more effective protection for devices or equi