Design of automatic fire extinguishing of explosive object

1. Design Input

The basis for the design was:

a) assignment for design of fire extinguishing plant;

b) process and architectural and construction drawings;

c) technical documentation for automatic fire extinguishing system equipment.

2. Characteristics of protected premises

The automatic fire extinguishing plant shall be protected by the glue preparation and gasoline spill rooms of the glue plant building.

The area of ​ ​ the glue preparation room is 136.5 m2, the gasoline spill room is 45.9 m2. Category of premises according to explosion and fire hazard according to SP 12.13130.2009 - "A," according to PUE - BIa. The distance from the floor to the highest point of the premises is 6.5 m. The distance to the bottom of the trusses is 5.25 m. The slabs are ribbed. The roof is double-pitched. In the gasoline spill room there is a rack at an altitude of 2.45 m. Fire class "B." The fire warning system for people is adopted by type 2.

The room of a fire post is organized in the person on duty at a checkpoint of the enterprise where the computer with the installed software of an automated workplace Orion, room space more than 15 sq.m is placed, emergency lighting, heating with air temperature +1825os is organized, the room is equipped with telephone communication.

3. Purpose and composition of automatic fire extinguishing unit.

In accordance with the requirements of the design task and SP 5.13130.2009, the premises for glue preparation and gasoline spill are equipped with an automatic powder fire extinguishing unit.

The automatic fire extinguishing unit is designed to detect and extinguish a fire in the premises for glue preparation and gasoline spilling, to generate fire and malfunction signals at the Orion AWS at the passing enterprise, where round-the-clock personnel duty is organized, as well as to notify people in the premises in case of fire.

The unit includes:

- Fire detectors thermal linear PHSC155EPC - for fire detection in the premises of glue preparation and gasoline spill;

- Manual fire detectors IPRI, IP535-07e - for fire notification and remote start-up of the plant;

- Magneto-contact explosion-proof sensors IO10226/B "Ajax" to block the installation start-up at open doors;

- Modules of powder fire extinguishing explosion-proof WFP (RW) -8-I-GE-UKhL cat.3.1 "Buran8 explosion-proof" - for fire extinguishing and containment in the premises for glue preparation and gasoline spilling. Calculation of the automatic powder fire extinguishing unit is given below;

- Fire control and receiving devices "S2000ASPT" - for reception of signals about fire detectors operation, fire extinguishing plant start-up control, as well as transmission of signals about APT system status to the duty room;

- Modules the interface firefighters with a type of explosion protection "An intrinsically safe electrical circuit" "MIP2Eh" - for the organization of intrinsically safe chains of loops for connection of thermal linear announcers of PHSC155EPC, for delivery of signals "Fire" and "Malfunction" in loops of S2000ASPT devices;

- Safety and fire control devices with explosion protection type "Intrinsically safe electrical circuit" UPKOP 13511 - for organization of intrinsically safe loops circuits for connection of magnetic contact sensors IO10226/B "Ajax," for output of signals "Violation" and "Malfunction" to loops of devices "C2000-ASPT"

- Test and start-up units "S2000-KPB" - for increase of start-up directions, after-start of warning system, disconnection of supply and exhaust ventilation (except for overpressure in tambours), closing of fire retardant valves in case of fire;

- The C2000M control panel - for combination of all above-mentioned devices in a uniform system and control and management of its work and also for reservation of an automated workplace Orion (the second way of reservation according to the passport of the C2000M remote controller is recommended);

- The redundant power supply "RIP12 Isp.05" - for power supply of devices of a system, warning system power supply at the fire and starting devices of modules of powder fire extinguishing in the Fire mode;

- Light annunciators "LUX" NBO12V01, explosion-proof light annunciators "Ekran-S" with inscriptions "Powder! Don't come in!, "" Powder! Leave!, "Light annunciators" LUX "NBO24V01" Automation is off, "sound explosion-proof annunciators" VSαe, "sound annunciators" Mayak12ZM "- to alert people about fire and plant operation;

- Single-channel relay amplifiers "UKVK/03" for disconnection of plenum ventilation (except for overpressure in tambours) and closing of fire-retarding valves in case of fire ;

- Connecting wires and cables, installation products.

4. Justification for selection of plant type

automatic fire extinguishing.

According to SP 5.13130.2009, the premises for glue preparation and gasoline spill are subject to AUPT protection.

The APTA selection algorithm includes the following main steps:

- selection and preparation of initial data;

- selection of fire extinguishing agent, fire extinguishing method and AUPT type;

- substantiation of the main parameters of AUPT.

4.1. General provisions.

4.1.1.The selection of the type of automatic fire extinguishing installation for the premises for glue preparation and gasoline spill is made in accordance with the provisions of SP 5.13130.2009, GOST 12.3.046, GOST 12.1.004, as well as "Fire automation equipment. Scope. You-boron type: Recommendations "VNIIPO EMERCOM of Russia (2004).

4.1.2.Automatic fire-fighting installations shall comply with the requirements of regulatory documents applicable in this area.

4.1.3. Selection of AUPT type is made on the basis of data on physicochemical and fire-extinguishing properties of the intended fire extinguishing substances for use, structural and volume-planning features of the protected building, premises located in it, properties of material assets, equipment, substances and materials.

4.1.4.In accordance with the requirements of item 7 of GOST 12.3.046, automatic fire extinguishing units must be activated for a time less than the time of the initial stage of fire (critical time of free fire development ).

4.1.5.This section provides the rationale for choosing an automatic powder fire extinguishing unit. Since an open opening is provided between the premises for the preparation of adhesives and the bottling of gasoline, the total area of ​ ​ 2 rooms is used in the calculations when justifying the choice of the AUPT type.

5. Fire fighting automation.

Principle of operation of the installation

automatic fire extinguishing.

For fire extinguishing automation, the project provides for the equipment of the integrated safety system Orion - instruments "S2000ASPT," "S2000-KPB" and the monitoring and control panel "S2000M," as well as intermediate devices UPKOP 13511 and MIP2Ex.

The C2000M control panel is intended for control of a state and collection of information from devices of a system, maintaining the minutes of the events arising in a system, indication of alarms, management of setting on protection, by removal from protection, control of automatic equipment and also reservation of an automated workplace Orion.

The panel allows displaying on the liquid crystal display (LCD) messages about fires, alarms, malfunctions, security, removal from protection, fire extinguishing start and malfunctions of starting circuits. It is possible to sound alarm messages. The console stores messages in a non-volatile event buffer from which they can be viewed on the LCD.

The console combines the devices connected to it into one system through the RS485 interface, ensuring their interaction with each other.

Devices reception and control and managements firefighters of "S2000ASPT" accept signals "Fire" from the UPKOP 13511 intermediate devices and MIP2Eh or from tame fire announcers of IPRI, IP535-07e installed inside and outside the protected rooms, interlock the installation start at open doors, transmit signals to start the unit via RS485 internal interface to "S2000KPB" units with time delay from the moment of "Fire" signal reception according to SP 5.13130.2009 equal to 15 s (evacuation time, but not less than 10 s), simultaneous startup of modules in one of 2 directions is used (glue preparation room or gasoline spill room), at that the duration of starting pulse is 15 sec.

Test and start-up units "S2000KPB" are designed to increase the number of launch directions. The relay outputs of blocks by means of commands via internal RS485 interface from S2000ASPT devices on the set algorithm operate start of modules of powder fire extinguishing. In the normal mode the blocks exercise control of starting chains on break and short circuit with information output via internal RS485 interface on S2000ASPT devices which transfer further information to the C2000M remote controller. A separate control and start-up unit is provided for starting the light and sound warning system, disconnecting the ventilation systems and closing the fire retardant valves in case of fire in the glue factory building. It exercises control of turning on of annunciators light "LUXURY" of NBO12V01, annunciators of light explosion-proof "EkranS" with inscriptions "Powder! Don't come in!, "" Powder! Go!, "Light annunciators" LUX "NBO24V01" Auto-tika is OFF, "sound explosion-proof annunciators" VSαe, "sound annunciators" Mayak12ZM. "

Fire detectors PHSC155EPC, which are activated when the temperature of 1550F (68.30C) is reached in the premises, are used as triggers of automatic activation of the fire extinguishing unit in the premises of glues preparation and gasoline spill.

AUPT is started when 2 PHSC155EPC fire detectors installed in different loops laid in the glue preparation room under the overlap and in direct contact with the fire load (glues), in the gasoline spill room - under the overlap and rack. The distance between the detectors installed under the overlap according to paragraph 13.7.2. SP5.13130.2009 is adopted not more than half of the normative. Tame fire announcers of the International Party of Russia-I, IP53507e, established on escape routes, are intended for manual start of a system of powder fire extinguishing.

6. Fire warning system.

According to SP 3.13130.2009, in the premises for glue preparation and gasoline spill, a warning system for type 2 fire is designed, which includes light and sound methods of warning. Light annunciators "LUX" NBO12V01, "Screen-S" "Powder! Don't come in!, "" Screen C "" Powder! Go away!, "Sound alerts" VSαe, "" Mayak-12-ZM. "

The calculation of the number of sounders is shown below. At operation of 2-linear thermal fire announcers in loops of the S2000ASPT device for the period of "A start delay" (15 c) EkranS indicating panels "Powder turn on! Go away! " After completion of "Start delay" time the "Powder! Go away! "Turn off, a starting pulse of 15 s duration is supplied to start the plant, for a time equal to 15 s the" Powder! Don't come in!. " At setting of the unit to "Fire" mode for a time equal to 60 s the sound annunciators "VSαe," "Mayak-12-ZM" are actuated, from the output relay of the existing device "Signal20P" the existing "Output" annunciators are actuated. To display the information on the operation mode of the powder fire extinguishing unit, the "LUX" light annunciators NBO24V01 "Automation is off" are provided.

The warning system actuation is controlled at generation of "Fire" signal in the system by means of actuating relays of "S2000-KPB" test and start unit. The fire warning system can be switched on both automatically when linear thermal fire detectors are triggered, and manually when manual fire detectors are turned on.

10. Power supply and grounding.

According to the degree of reliability of power supply, fire automation units belong to electrical receivers of category I according to PUE.

The required category of power supply of the fire extinguishing unit is provided by the redundant power supply source "RIP12 is.05," designed to supply the devices of PKU "S2000M," "S2000KPB," "MIP-2-Ex," "UPKOP 13511" and devices "S2000ASPT." The redundant power supply "RIP12 Isp.05" and S2000ASPT devices have the built-in accumulators which provide power supply of installation of fire extinguishing at emergency shutdown of an external power line. In the normal mode of the device of a system eat from separate groups of a distributive guard of SR which in turn eats from separate group of the vvodnoraspredelitelny device (VRU) of the building that conforms to requirements of the joint venture 6.13130.2009.

Protective grounding of metal casings of the redundant power supply "RIP12 isp.05" and S2000ASPT devices is carried out by a separate vein of supply cables.

In the areas of glue preparation and gasoline spilling, all metal equipment enclosures: powder fire extinguishing modules, "VPE" sound annunciator, IP535oune manual fire detectors, as well as metal cables for laying cables are grounded by connection to the existing grounding loop with a PGL4 wire.

12. Installation of wiring.

Loops of the automatic fire alarm and the line of RS485 interface in the protected rooms are laid by fire-resistant KSREVngFRLS2h0.5 cable in metal hoses of R3-Ts-H. Lines of start-up of MPP are laid by KSREVngFRLS2h0.8 cable (section lived 0.5 mm2) in tight metal hoses of R3TsH, lines of power supply of devices are laid by KSREVngFRLS2h0.8 cables .

Lines of the warning system are laid by KSREVngFRLS2h0.8 cable (section lived 0.5 mm2) in R3TsH metal hoses.

Since KSREVngFRLS cable is fire resistant, the above methods of laying fire extinguishing and warning systems lines in case of fire comply with fire resistance requirements according to SP 3.13130.2009, SP 5.13130.2009, SP 6.13130.2009.

Fire alarm loops in protected rooms shall be laid separately from all power cables, lighting cables and wires. In case of parallel open laying, the distance between wires and cables of fire alarm loops and connecting lines with power and lighting wires must be at least 0.5 m. It is allowed to reduce the distance to 0.25 m to single lighting wires and control cables.

13. Equipment placement.

Installation and installation of automatic fire detectors and powder fire extinguishing modules shall be carried out in accordance with the design, requirements of SP 5.13130.2009, manufacturer's instructions, as well as taking into account building structures and lighting fixtures.

Thermal linear fire detectors are fixed on ropes at a distance of 100 mm from the ceiling, as well as in direct contact with the fire load (glues), manual fire detectors for transmitting a fire notice are installed at a height of 1.5 m from the indoor floor at the exits from the building.

Powder fire extinguishing modules are installed on brackets on walls and ceiling.

Fire extinguishing control devices "S2000M," "S2000ASPT," redundant power supply source "RIP12 isp.05" are installed in the room of the masters, test and launch units "S2000-KPB" (SC1... SC3, SC6), MIP2Ex devices, UPKOP 13511 which are also installed in the metal room in the machine. S2000KPB blocks (SC4, SC5) are mounted in a metal case of Shch-2 (ShchMP1) with degree of protection of IP54 which is established on the site of water lubricants. Placement of instruments shall prevent their accidental fall or movement along the installation surface, in which the connected wires and cables may be damaged .

Light annunciators with the inscription "Powder! Go away! "Are installed above the doors inside the protected rooms. Light annunciators with the inscription "Powder! Do not enter! "and" Automation is off "are installed above the doors outside the protected rooms. Sound annunciators shall be installed 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. Install IO10226/B "Ajax" magnetic contact security detectors at a distance of not more than 200 mm from the edges of door sheets.