Automatic modular powder fire fighting warehouse

Appointment

The Automatic Powder Fire Extinguishing Unit (APCP) is designed to automatically detect and extinguish fire centers when controlled fire factors exceed the established threshold values ​ ​ in the protected area. AUPP also notifies the personnel of the facility and the security of the fire.

Design Input

The project was carried out in accordance with the "Technical Assignment for the Design of the Automatic Installation of Powder Fire Extinguishing of the Pharmaceutical Warehouse Premises.

Architectural drawings of the Protected Object and additional information provided by the Customer are used as initial information for the design.

Brief description of the protected object

APCP shall be protected by a pharmaceutical warehouse. The warehouse provides for the storage of pharmaceuticals on metal racks in cardboard packaging.

The warehouse is located on the 1st floor. The area of ​ ​ the protected room is 193 m2.

Storage category by explosion and fire hazard "B2."

Zone class as per PUE - "PIIa."

The height of the room from the floor level to the suspended ceiling is 3.1 m, the height to the main floor is 4.0 m. Behind the suspended ceiling of the protected room, cables (wires) with a total volume of combustible mass of less than 1.5 liters per 1 meter of cable line are laid.

The warehouse room is separated from the other rooms by fire barriers with a fire resistance limit of at least 0.75 hour (partitions EI45, walls and floors REI 45).

Doors of rooms prior to installation are equipped with devices for self-closing and sealing of slides.

Conditions in the warehouse premises comply with sanitary standards and do not impose additional requirements for the used technical means of safety systems.

The remaining rooms are equipped with an automatic fire alarm system and a fire warning and evacuation control system in accordance with project No. 12.06.05PSASS.

Main design solutions, composition and placement of elements.

Principle of operation.

Modular type AUPP, fire extinguishing agent - powder.

AUPP is made on the basis of modules of powder WFP (p) 2,5IGEUHL cat.3.1 (Buran2.5).

As equipment for receiving and processing signals, as well as issuing control pulses of automatic installation of powder fire extinguishing, the equipment manufactured by NVP "Bolid" (Korolev) is used:

- fire control and acceptance device "S2000ASPT" (2 pcs.);

- "S2000KPB" test and start-up unit (3 pcs);

- "S2000SP1" signal-starting unit (1 pc.);

- interface repeater "S2000PI" (1 pc.);

The C2000 control panel which is installed on a protection post on 1 floor indoors with the round-the-clock watch of service staff, is provided by the project of automatic fire alarm No. 12.06.05PSASS.

Acceptance and control equipment provides:

• monitoring of fire alarm loops condition, door condition sensors circuits, manual start-up sensor circuits;

• serviceability check of starting circuits for break and short circuit ;

• Start and control of automatic fire extinguishing modules operation;

• temporary delay before fire extinguishing means start-up;

• remote start of fire extinguishing means on command from the C2000 remote controller;

• manual start of fire extinguishing equipment from manual start sensors;

• automatic start of fire extinguishing equipment when two fire detectors are activated;

• actuation of sound and light fire warning (siren, annunciator);

• serviceability check of annunciator circuits for break and short circuit ;

• process control (ventilation shutdown);

• interlocking of automatic start-up when doors are opened to the protected room ;

• manual (from the device panel) or remote (from the C2000 console) dumping of fire alarm and the mode of start of fire extinguishing means ;

• control of test and start-up units "S2000KPB;

• transfer of office and disturbing messages on the C2000 remote controller

• restriction of access to controls on the front panel by means of electric contact lock;

• control of device housing opening;

• monitoring of mains and backup power supply, disconnection of backup power supply during battery discharge

Smoke fire detectors IP 21241M are used as technical means of fire detection in protected rooms. When selecting fire detectors, environmental conditions, the purpose of the room, the probability of a fire and the dynamics of its development are taken into account.

Manual fire detectors of IPR3SU are installed to send signals to start the plant in case of visual detection of ignition.

To transmit signals to the receiving equipment, an independent low-current network is provided.

When one fire detector is activated in the alarm loop, the receiving and monitoring equipment generates a signal "Attention" with indication of the direction in which the operation occurred. When two fire detectors operate in the loop, the receiving and monitoring equipment generates a signal "Fire." Sound annunciators, "Go away powder" and "Do not enter powder" annunciators are ON. The forced ventilation system is disconnected. After a time delay of 30 sec to evacuate the maintenance personnel, if the automatic control system is in the "Automatic on" state, the receiving and control equipment outputs an electric pulse to the activators of the Buran2.5 powder fire extinguishing modules of the direction in which the detectors worked. The gas-generating element is started with intensive gas release, which leads to pressure increase inside the module body, destruction of the membrane and release of fire-extinguishing powder into the combustion zone.

Magneto-contact detectors are installed on the doors in the protected rooms, which turn off the automatic start mode of the installation when they open. Indication of OFF state is displayed on "Automatic OFF" annunciator located in front of entrances to protected rooms.

Restoration of the mode of automatic start-up is carried out manually from the front S2000ASPT dashboard and from the C2000 console.

The design provides for the issuance of control signals for the shutdown of the forced ventilation system in case of fire.

If alarm loops and start lines (break, short circuit) are damaged, sound and light signal of damage with indication of number of damaged loopback (line) is activated on the receiving equipment.

A detailed description of the principle of operation of the receiving equipment and individual elements included in the installation is given in the technical documentation of the manufacturers.

Fire extinguishing powder by the degree of exposure to the body refers to low-hazard substances of hazard class IY in accordance with GOST 12.1.00776. Irritating effect: on the mucous membrane of the eyes - weakly expressed, on the skin - absent. Powder compositions used are not toxic, do not corrode metals in dry form. After a fire, the powder can be removed with a vacuum cleaner or washed away with water.

Power supply

The automatic fire extinguishing installation according to the degree of reliability of the power supply shall have a power supply of category 1 according to PUE. If it is impossible to supply electric receivers from two independent sources, it is allowed to supply them from one source: from different transformers of two-transformer or from two nearby single-transformer substations connected to different supply lines laid along different routes with an automatic reserve input device.

At objects of power supply reliability category III it is allowed to use storage batteries providing power supply of electric receivers in standby mode for 24 hours and in "Alarm" mode for at least 3 hours.

The main input ~ 220V, 50Hz is carried out from the nearest emergency lighting panel (a separate machine is installed ).

Backup power supply of system equipment is provided from accumulators installed in PPKUP "S2000ASPT" and from backup power supply unit BRP 2401M3 (12V, 3A with accumulators - 2 pcs at 7 A/h).

Power supply supply ~ 220B, 50 Hz to PPKUP of "S2000ASPT" and the block of reserve food of BRP 2401M3 is carried out by the Customer from free groups of a guard of emergency lighting according to task 12.06.05PT.E-ZD1.

Safe operation measures

To protect maintenance personnel from electric shock in case of insulation damage, metal housings of electrical equipment and devices are provided.

The electrical equipment shall be reliably grounded according to PUE from the de-grounded neutral of AC mains. The equipment is grounded by a copper cable that is connected to the ~ 220V electrical panel grounding bolt or third core power cable .

Corrosion protection

Corrosion protection shall be provided for auxiliary steel structures for attachment of detectors, equipment and cables. Protection is performed by applying protective painting of PF115 grade enamel, GOST 646582, in two layers on a pre-cleaned and defatted surface.

Environmental protection

Due to the absence of harmful effects on the environment, special measures for environmental protection are not provided.

Fire Warning System

To notify people about the fire and inform about the fire extinguishing plant operation mode, it is provided to install KOP25 lights with the inscription "Powder - leave" inside the protected room at the exits.

Outside the warehouse room at the entrances, COP25 light annunciators with the inscription "Powder - do not enter" and "Automatic - disconnected" are installed. Sound annunciation of fire and installation start is performed by "VP1" sound annunciators. Audible annunciators shall be mounted at a height of not less than 2.3 m from the floor level, but the distance from the ceiling to the annunciator shall be not less than 150 mm. Sound signals shall provide a common sound level, a constant noise sound level together with all signals produced by the annunciators at least 75 dBA at a distance of 3 m from the annunciator, but not more than 120 dBA at any point of the protected room.

The time of evacuation of people from the warehouse in case of fire does not exceed 30 sec.

10. Requirements for selection and routing of alarm networks

Alarm, light warning and automatic start-up interlocking networks are performed by cable ASCAB004 4x0,22 and ASCAB008 8x0,22.

Fire extinguishing module starting circuits are made by KLMA 4x0.8 + 0.8 shielded cable .

Audible warning networks are performed by 2x0.75 CVP wire.

All cable laying, except for networks of the notification, is made in flexible corrugated pipes TGGL 0.1 of PVC and TMC0317 22/1х10 cable channels. Warning networks are performed in the metal box.

In all cases where wires and cables pass through walls, wire or cable, lay in a separate piece of steel pipe.

All cable products have the necessary fire safety certificates.

Laying of wires and cables should be carried out in accordance with PUE, OSTN 60093 "Industry Construction and Technological Standards for the Installation of Communication, Broadcasting and Television Facilities and Devices" and "Construction Manual for Linear Structures of Local Communication Networks" 1996.

Joint laying of circuits with voltage up to 60V with circuits with voltage over 60V in one pipe, one hose, conduit, bundle, closed channel of construction structure or on one tray is not allowed.

Joint laying of these chains is allowed only in different compartments of boxes and trays having continuous longitudinal partitions with a fire resistance rating of at least 0.25 hours from non-combustible material.

In case of parallel open laying the distance between wires and cables of signalling loops and connecting lines with power and lighting wires shall be at least 0.5 m.

If it is necessary to lay these wires and cables at a distance of less than 0.5 m from the power and lighting wires, they must be protected from aiming.

It is allowed to reduce the distance up to 0.25 m from wires and cables of alarm loops (alerting) and connecting lines without protection from aiming to single lighting wires and control cables.