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In addition, some industrial enterprises have special requirements for water
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Water supply system for production and fire fighting: in some industrial enterprises, water supply system for production and fire fighting is adopted
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The working principle of automatic fire alarm control system: the automatic fire alarm system is composed of trigger device, fire alarm device (i.e
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When the independent water supply system is used for production water, on the premise of no production accident, the necessary fire hydrant can be set on the production pipe network as the standby water source for fire fighting, or the production water supply network can be connected with the fire water supply pipe network as the second water source for fire fighting
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1、 Automatic fire alarm system automatic fire alarm system is a kind of automatic fire-fighting facilities set up in buildings or other places in order to detect and report the fire early, and take effective measures to control and put out the fire in time
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Temporary high-pressure fire water supply system: the pressure in the pipe network of the temporary high-pressure fire water supply system is not high at ordinary times, so the high-pressure fire water pump is set in the pump station (room) to start immediately in case of fire
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Mechanical smoke control is to send enough fresh air into the evacuation passageway and other parts that need smoke control, so as to maintain the pressure higher than other parts of the building, so as to block the smoke generated in the fire area outside the smoke control parts
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When the production, domestic and fire water consumption reaches the maximum hourly water consumption (the shower water consumption can be calculated as 15%, and the watering and washing water consumption can not be included), The water consumption for indoor and outdoor fire fighting shall be maintained, and the water consumption for fire fighting shall be calculated according to the maximum flow per second
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This kind of water supply system can sometimes save a lot of investment, which is in line with the development policy of China’s national economy
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Composition and working principle of mechanical smoke exhaust system: the mechanical smoke exhaust system is composed of smoke exhaust outlet, smoke exhaust fire damper, smoke exhaust pipe, smoke exhaust fan, smoke exhaust outlet and smoke exhaust controller
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With this kind of water supply system, when the production water consumption reaches the maximum water consumption, the total fire water consumption should still be guaranteed, and when the fire water consumption reaches the maximum, the production accident will not be caused by the decrease of water pressure, and the fire water will not be interrupted during the maintenance of production equipment
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However, there should be no more than two valves to convert the production water into fire fighting water, and the opening time of the valves should not exceed 5 minutes In order to supply fire water in time
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In this way, the water in the pipe network often keeps flowing, the water quality is not easy to get bad, and the investment is more economical, at the same time, it is convenient for daily inspection and maintenance, and the fire water supply is more safe and reliable
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When the water supply system is adopted, the pressure of the pipe network ensures that the water pressure of the fire hydrant at the most unfavorable point is not less than 10 m water column (calculated from the ground)
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manual alarm button, fire detector, etc.), fire alarm device (i.e
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Outdoor fire hydrant water supply system outdoor fire water supply system mainly according to the fire water pressure, main purpose, pipe network layout, outdoor fire hydrant classification of all outdoor fire safety work
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When the domestic and production water consumption is large, but the fire water consumption is small, this water supply system should be adopted
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With this kind of water supply system, when the domestic water consumption reaches the maximum hourly water consumption, the total fire water consumption should still be guaranteed
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3、 Fire hydrant water supply system fire hydrant water supply system is divided into indoor fire hydrant and outdoor fire hydrant water supply system by taking the external walls of buildings and structures as the boundary
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Composition of automatic fire alarm system: automatic fire alarm system is generally composed of fire detection and alarm system, fire linkage control system, combustible gas detection and alarm system and electrical fire monitoring system
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sound and light alarm, fire alarm bell, buzzer, etc.) and other auxiliary function devices
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Low pressure fire water supply system: the pressure in the pipe network of the low-pressure fire water supply system is low, and the pressure required by the water gun when extinguishing the fire is formed by the pressure of the fire truck or other mobile fire water pump
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There is no need to use fire engines or other mobile fire pumps to pressurize the fire site, and the fire can be put out by directly connecting the water hose and water gun from the fire hydrant
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When a fire occurs in a building, the fire signal is transmitted to the smoke control controller by the fire personnel or the smoke detector, the movable smoke damper wall is opened to control the smoke in the smoke control zone of the fire, the smoke outlet and the smoke damper linked with the smoke outlet are opened, and the fire control valve in the air conditioning system and the air supply duct is closed to prevent the smoke from escaping from the air conditioner The ventilation system spreads to other non fire rooms, and finally the smoke is discharged to the outside through the smoke exhaust pipe by the smoke exhauster set on the roof
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Smoke prevention system refers to the system that adopts mechanical pressure air supply or natural ventilation to prevent smoke from entering evacuation passageway and refuge place in case of building fire
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Therefore, the water supply system for production and fire fighting is seldom used in industrial enterprises
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From the aspect of maintenance and use, this system is also relatively safe and reliable
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Smoke exhaust system is a system that uses mechanical smoke exhaust or natural ventilation to exhaust smoke outside the building and control the smoke area in the building to maintain a certain visibility
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When using this kind of water supply system, the pressure in the pipe network should be kept to the maximum water consumption for production, living and fire fighting, and when the water gun is arranged at the highest place of any building within the protection range, the full water column of the water gun should not be less than 10m
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At the same time, it shows the location and time of the fire, so that people can find the occurrence of the fire in the shortest time, and take effective fire-fighting measures in time to put out the fire at the initial stage and minimize the loss of people’s lives and property
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There are commonly used automatic fire alarm systems, sprinkler systems, fire hydrant systems, gas fire extinguishing systems, foam fire extinguishing systems, dry powder extinguishing systems, smoke and smoke exhaust systems, and safety evacuation systems
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Because the water pressure requirements of production water and fire water are often very different, the production water may be affected when using fire water
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Water supply system for living, production and fire fighting: the water supply system in large and medium-sized towns is basically water supply system for living, production and fire fighting
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2、 Smoke control system the function of fire smoke control system is to use mechanical smoke exhaust method to eliminate the harmful smoke generated by the fire to the outside, so as to reduce the indoor personnel inhale more smoke and avoid poisoning or suffocation
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Outdoor fire water supply system is divided into high pressure fire water supply system, temporary high pressure fire water supply system and low pressure fire water supply system according to fire water pressure requirements
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Domestic and fire water supply system: the domestic and fire water supply system is widely used in towns, residential areas, enterprises and institutions
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Outdoor fire water supply system can be divided into domestic and fire water supply system, production and fire water supply system, production and life fire water supply system and independent fire water supply system
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Independent fire water supply system: when the production and domestic water consumption in industrial enterprises is small and the fire water consumption is large, it is not economical to combine them together, or it is technically impossible to combine the three kinds of water, or the production water may be polluted by flammable and combustible liquids, the independent fire water supply system is often used.
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Building fire-fighting facilities refer to the general name of the automatic fire alarm system, automatic sprinkler system, fire hydrant system and other equipment and facilities set up in buildings (structures) to prevent and put out the fire of buildings (structures)
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Composition and working principle of smoke control system: smoke control system is divided into smoke control system and smoke exhaust system
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Composition and working principle of mechanical pressure air supply and smoke exhaust system: mechanical pressure air supply and smoke exhaust system is mainly composed of air supply outlet, air supply pipeline, air supply fan and fan control cabinet
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The fire detector can generate burning objects in the early stage of fire The smoke, heat, flame and other physical quantities are transformed into electrical signals and transmitted to the automatic fire alarm controller
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High pressure fire water supply system: high enough pressure is often maintained in the pipe network of high pressure fire water supply system
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It is one of the indispensable safety technology facilities in modern fire fighting
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