Foam fire suppression system
Description:
A foam fire extinguishing system mainly consists of a fire pump, a
fire water source, a foam extinguishing agent storage device, a
foam proportioning device, a foam generating device, and pipelines.
It works by mixing foam extinguishing agent and water in a specific
ratio using a foam proportioner to create a foam mixture, which is
then used by the foam generating device to form air foam before
being applied to the burning object to extinguish the fire. | | High multiplier generator | Semi fixed foam fire extinguishing device | Vertical/horizontal foam tank |
Product features:
Flexible mobility: The wheeled fire extinguishing device has a
small product volume and occupies a small area
Diverse water supply methods: Pressurized water can be provided in
various ways, such as fire protection networks, urban water supply
networks, fire engines, and portable pumps
Simple operation: When pressurized water passes through the mixer,
water and foam are mixed in the prescribed proportion, and the foam
generator of the clean foam gun sprays to extinguish the fire
Product details and specifications:
Working principle:
When the pressure water of the water supply pump enters the
proportional mixer from the inlet pipe and valve, most of the water
enters the main pipe and the proportional mixer throttling device.
According to the principle of fluid mechanics, a section of low
pressure zone is formed behind the throttling device, and a small
part of the water enters the inlet pipe and flows into the storage
tank, squeezing the diaphragm. Under the pressure of the pressure
water, the extinguishing agent in the bag enters the low pressure
zone of the proportional mixer through the outlet pipe and the
outlet valve, so that the water and extinguishing agent are
automatically mixed in proportion to form a foam mixture, which is
sent to the foam generator and the spraying equipment through the
pipeline for extinguishing.
In many practical engineering applications, the design requires
that electric ball valves should be installed on the water inlet
pipe and liquid outlet pipe of the foam tank, and the field control
cabinet should be equipped. The control principle is as follows:
Principle of fire automatic control: When the on-site control
cabinet is set to automatic mode, when the fire signal arrives, the
inlet electric ball valve and outlet electric ball valve (220V) on
the storage tank will be automatically opened; When the fire signal
disappears, the inlet valve and outlet valve are automatically
closed. There is a working status indicator light on the control
cabinet (closed/open), and the valve feedback point on the control
cabinet is the active point (220V), If passive feedback contacts
are required, they should be specified in the procurement
requirements.
When manually controlling, the on-site control cabinet must be set
to manual mode, and the corresponding valve opening and closing
buttons on the control cabinet should sequentially open/close the
inlet electric ball valve and the outlet electric ball valve. In
case of power shortage in the on-site control cabinet, the valve
opening wrench equipped on the electric valve can be used to
manually open the electric valve | |
parameter Size | A | B | Diameter | D | H | Weight KG | | 1 ton | 1070 | 350 | 1000 | 1100 | 2300 | 380 | | 1.5 tons | 1150 | 350 | 1200 | 1100 | 2400 | 450 | | 2 tons | 1250 | 350 | 1300 | 1100 | 2500 | 500 | | 3 tons | 1450 | 350 | 1500 | 1260 | 2850 | 700 | | 4 tons | 1500 | 350 | 1600 | 1500 | 3040 | Not labeled |
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Working principle:
When the pressure water of the water supply pump enters the
proportional mixer from the inlet pipe and valve, most of the water
enters the main pipe and the proportional mixer throttling device.
According to the principle of fluid mechanics, a section of low
pressure zone is formed behind the throttling device, and a small
part of the water enters the inlet pipe and flows into the storage
tank, squeezing the diaphragm. Under the pressure of the pressure
water, the extinguishing agent in the bag enters the low pressure
zone of the proportional mixer through the outlet pipe and the
outlet valve, so that the water and extinguishing agent are
automatically mixed in proportion to form a foam mixture, which is
sent to the foam generator and the spraying equipment through the
pipeline for extinguishing. In many practical engineering applications, the design requires
that electric ball valves should be installed on the water inlet
pipe and liquid outlet pipe of the foam tank, and the field control
cabinet should be equipped. The control principle is as follows: Principle of fire automatic control: When the on-site control
cabinet is set to automatic mode, when the fire signal arrives, the
inlet electric ball valve and outlet electric ball valve (220V) on
the storage tank will be automatically opened; When the fire signal
disappears, the inlet valve and outlet valve are automatically
closed. There is a working status indicator light on the control
cabinet (closed/open), and the valve feedback point on the control
cabinet is the active point (220V), If passive feedback contacts
are required, they should be specified in the procurement
requirements. When manually controlling, the on-site control cabinet must be set
to manual mode, and the corresponding valve opening and closing
buttons on the control cabinet should sequentially open/close the
inlet electric ball valve and the outlet electric ball valve. In
case of power shortage in the on-site control cabinet, the valve
opening wrench equipped on the electric valve can be used to
manually open the electric valve | |
Foam liquid Types:
Foam fire extinguishing systems are classified into
three types based on the foam expansion ratio: high, medium, and
low expansion.
There are also multiple options for the type of foam
liquid | | Soluble water film forming foam extinguishing agent (AFFF/AR-3%,
AFFF/AR-6%) | Aqueous film-forming foam(AFFF-3%,AFFF-6%) | Soluble fluoroprotein foam extinguishing agent (FP/AR-3%, FP/AR-6%) | Fluoroprotein foam extinguishing agent (FP-6% FP-3%) | Soluble water-resistant film-forming foam extinguishing agent is
composed of hydrocarbon surfactant, fluorocarbon surfactant,
desiccant, additive, polar film-forming agent, stabilizer,
antifreeze, preservative, etc. In addition to the performance of
ordinary
aqueous film forming foam extinguishing agent to extinguish oil
fires, this extinguishing agent can also quickly extinguish polar
solvent fires such as alcoho, ketone and aldehyde (polar film
forming agent is added in the production process, forming
a layer of gel film on the surface of polar flammable liquid to
protect the foam from damage). It is a multi-functional foam
extinguishing agent. Widely used in key disaster prevention sites
such as oil fields, refineries, oil depots, ships, large chemical
plants,
chemical fiber plants, petrochemical enterprises, chemical product
warehouses, solvent plants, etc. | Aqueous film-forming foam extinguishing agent (also called light
water foam extinguishing agent) is composed of hydrocarbon
surfactant, fluorocarbon surfactant, auxiliary agent, stabilizer,
antifreeze, etc. It is an efficient foam extinguishing agent. It is
characterized by forming a protective film on the surface of oil to
inhibit oil evaporation. With the dual role of foam and protective
film, it has high fire extinguishing efficiency, fast speed, good
anti reburning performance and sealing performance, high pollution
resistance and long storage period. It can foam in various low and
medium expansion foam generating equipment to put out oil fires;
It can be used in combination with dry powder fire extinguishing
agents to extinguish fires, and can also be used to extinguish
large
oil storage tank fires through "underwater spraying". Widely
applicable to key disaster prevention sites such as oil fields,
refineries,
oil depots, ships, docks, airports, hangars, etc | Soluble fluoroprotein foam extinguishing agent (also known as
multifunctional fluoroprotein foam extinguishing agent)
is prepared by adding an appropriate amount of anti alcohol agent
and additives to fluoroprotein foam extinguishing agent. It
not only has the function of fluoroprotein foam to extinguish oil
fires, but also has the ability of anti soluble foam to
extinguish alcohol fires. It can be used to extinguish oil fires,
as well as alcohol,ketone, aldehyde and other
flammable polar solvent fires. Widely applicable to key disaster
prevention sites such as large petrochemical enterprises,
chemical fiber plants, oil storage solvent plants, breweries,
chemical product warehouses, ships, airports, oil extraction
platforms, storage and transportation terminals, etc | Fluoroprotein foam extinguishing agent is prepared by adding
appropriate fluorocarbon surfactant on the basis of protein foam
extinguishing agent. Due to the function of fluorocarbon
surfactant, the extinguishing agent has the extinguishing
performance of
protein foam extinguishing agent. The method of "underwater
spraying" can also be used to put out the fire of large oil product
storage
tanks, or it can be combined with dry powder extinguishing agent,
which is one third faster than protein foam extinguishing agent.
Widely applicable to oil fields, oil depots, petrochemical
enterprises, ships, airports, and units storing large amounts of
oil products,
used to extinguish large-scale oil fires. |
The main fire extinguishing mechanism of foam systems:
The purpose of extinguishing fires is achieved through the
covering, flooding, cooling and suffocation effects of the foam
layer
(1) Covering effect: The foam covering layer formed by
fire-extinguishing foam on the surface of the burning object can
isolate the surface of the burning object from the air.
(2) Sealing effect: The foam layer seals the surface of the burning
material, which can block the thermal radiation of the flame to the
burning material, prevent the evaporation or thermal decomposition
and volatilization of the burning material, and make it difficult
for flammable gases to enter the combustion zone.
(3) Cooling effect: The liquid folded from the foam has a cooling
effect on the combustion surface.
(4) Asphyxiation effect: The water vapor produced by the heating
and evaporation of foam has the effect of diluting the oxygen
concentration in the combustion zone.
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