JPS6054087B2 - Indoor fire extinguishing system with electrical power equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fire extinguishing system for a room equipped with power equipment such as a transformer room of an indoor substation or an underground substation.

As a precaution in the event of a fire in a room equipped with power equipment such as a transformer, when a valve is opened, a chemical solution is ejected and becomes a non-flammable gas.
It is common to install an automatic or manual halide fire extinguishing system that blocks the air by covering the combustible material with this nonflammable gas and extinguishes the fire by chemical fire suppression.

However, Japanese Patent Application Publication No. 47-27179 (JP, A) and Japanese Patent Application Publication No. 54-6, in which a halide fire extinguishing system is activated in the event of a fire.
5174 (JP, A) The ejected halide decomposes in the heat of the fire, producing a large amount of harmful fire extinguishing exhaust gas such as hydrogen halide along with heavy smoke.

Therefore, in order to restore the power equipment where the accident occurred and resume power supply as soon as possible, it is important to remove the fire extinguishing exhaust gas as soon as possible and restore the equipment. This type of fire extinguishing system is not equipped with a forced exhaust mechanism for extinguishing exhaust gas, as rapid exhausting of extinguishing exhaust gas containing smoke and smoke may cause great damage to humans and the surrounding environment. In order to prevent such secondary disasters, there is a need for a fire extinguishing system equipped with a highly reliable processing means that can simultaneously process smoke and harmful gases such as hydrogen halides. Furthermore, since rooms equipped with this type of power equipment are usually installed in buildings with limited space and area, such as indoor substations or underground substations, they must be small enough to occupy a small site area. It is necessary. The present invention was completed for the purpose of a fire extinguishing system for an indoor room equipped with electric power equipment that meets the above-mentioned requirements. A halide fire extinguishing system is installed, and an exhaust duct with an exhaust fan installed at the tip is connected to the chamber. In the middle of the exhaust duct, a honeycomb-shaped carrier with numerous through holes is filled with calcium, aluminum, magnesium, and sodium. , the ventilation pressure drop supported by potassium carbonate, hydroxide or oxide film is 10
00T! A dry reaction processing section below RlftAq and a smoke washing removal section for washing the intense smoke components sent along with the fire extinguishing exhaust gas treated in the dry reaction processing section using water spray are installed in sequence. It is characterized by:

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. Reference numeral 1 denotes a closed room such as a transformer room equipped with power equipment, and inside the room 1 is a conduit to a gas storage container of a halide fire extinguishing system 2. In the event that a fire occurs in power equipment where a nozzle 4 connected with
is activated, and a halide extinguishing agent such as bromotrifluoromethane (commonly known as Halon 1301) is released toward the power equipment that is the object to be extinguished in the room 1.

Reference numeral 5 denotes an exhaust duct that communicates with the interior of the chamber 1 and has one end connected to the side wall.The exhaust duct 5 is provided with an exhaust fan 7 at the end thereof on the side of the exhaust port 6, and has numerous through holes in the middle. Calcium is added to the honeycomb-shaped carrier as a scavenger that reacts with the gaseous halide contained in the extinguishing exhaust gas generated by the operation of the halide fire extinguishing device 2 in the chamber 1 to produce a nonvolatile halide. The ventilation pressure loss of aluminum, magnesium, sodium, and potassium carbonate, hydroxide, or oxide coatings is 1.
000wLAq or less dry reaction processing section 8, and a smoke water washing removal section 9 that uses atomized water to wash away heavy smoke components sent along with the extinguishing exhaust gas treated in the dry reaction processing section 8.
are provided in sequence.

In the figure, reference numeral 10 denotes a pump that sends water in the tank of the smoke washing and removal section 9 to a spray nozzle using a circulation vibrator 11, and the pump 10 is used by circulating the waste liquid generated in the smoke washing and removal section 9. This is to reduce the amount of water.
In the first embodiment shown in FIG. 1, the flow of the fire extinguishing exhaust gas exhausted through the exhaust duct 5 is directed to a tank provided with an inlet at the upper end and a communication port with the tank of the smoke washing and removing section 9 at the lower end. After passing through the dry reaction treatment section 8 provided in the smoke washing and removal section 9, the smoke is sucked from the upper end of the tank in the smoke washing and removal section 9 using an exhaust fan 7 and exhausted through the exhaust port 6. In the second embodiment shown in the figure, after passing through the dry reaction treatment section 8 provided in a tank 12 which has an inlet at the lower end and a communication port with the tank of the smoke washing and removing section 9 at the upper end, the smoke is washed with water. The exhaust gas is sucked from the lower part of the tank of the removal section 9 by the exhaust fan 7 and exhausted through the exhaust port 6, so that the water spray flow and the exhaust gas in the tank of the smoke washing and removal section 9 are in the same direction. In addition, in the third embodiment shown in FIG.
The exhaust gas passing through the dry reaction treatment section 8 is sent inside from the upper end of the tank of the smoke washing and removal section 9 for treatment, and is then exhausted as in the second embodiment. The design makes the processing equipment part even more compact. In a device configured as described above, when a fire occurs in a room 1 such as a transformer room equipped with power equipment, the halide fire extinguishing device 2 is activated, and the halide fire extinguishing device 2 is activated, and the halide is ejected from the nozzle 4 toward the power equipment that is the object to be extinguished. When the extinguishing agent is released, the halide extinguishing agent turns into a nonflammable gas that is heavier than air, covers the burning material, blocks air, and extinguishes the fire through chemical fire suppression.

At this time, the halide extinguishing agent decomposes in the heat of the fire, and a large amount of harmful gaseous halides such as hydrogen halide is generated along with heavy smoke.
An exhaust duct 5 with an exhaust fan 7 installed on the side wall of the
Since one end of the duct 5 is connected, the extinguishing exhaust gas generated in the chamber 1 due to the operation of the halide fire extinguishing system is sucked into the exhaust duct 5 by the operation of the exhaust fan 7. However, in the middle of this exhaust duct 5, a honeycomb-shaped carrier having countless through holes is used as a scavenger that reacts with the gaseous halide heptaide contained in the extinguishing exhaust gas to generate non-volatile halides. a dry reaction treatment section 8 in which a dried film of calcium, aluminum, magnesium, sodium, or potassium carbonate, hydroxide, or oxide, which has good adhesion to a honeycomb-shaped carrier, is supported; Since the exhaust duct 5 is sequentially provided with a smoke water washing removal section 9 that uses atomized water to wash away the intense smoke components sent along with the treated extinguishing exhaust gas, the exhaust duct 5
When the fire extinguishing exhaust gas sucked into first passes through the numerous through holes of the dry reaction treatment section 8, the gaseous halogen heptaide is collected as a non-volatile halogen heptaide by the coating film, which is a scavenger. The heavy smoke components sent along with the treated fire extinguishing exhaust gas are washed away by the sprayed water from the nozzle in the smoke washing and removing section 9, and are exhausted from the exhaust port 6. The exhaust gas exhausted from the port 6 is rendered harmless. In addition, the dry reaction treatment section 8 is a honeycomb-shaped carrier having countless through-holes and supports a dried coating of the scavenger, and since the total area of the coating is extremely large, hydrogen halides, etc. Toxic gases of 100 to 1000 mA can be accurately removed just by passing through this dry reaction treatment section 8, and the maximum ventilation pressure loss of normal exhaust equipment is 1000 mA.
There is no possibility that exhaustion becomes impossible due to exceeding q, and not only the size of the device can be reduced, but also the processing capacity can be improved and stabilized. As is clear from the above description, the present invention includes:
During the forcible exhaust of extinguishing exhaust gas, which contains gaseous nodium oxides and intense smoke, generated when extinguishing a fire in a room equipped with electric power equipment, it is made harmless and the intense smoke components are also removed, allowing it to be released into the atmosphere within a short period of time. The dry reaction treatment section using a honeycomb-shaped carrier is highly efficient, so almost no waste liquid is generated from the smoke washing and removal section. Since it does not contain halogen ions, there is no need for secondary treatment equipment to adjust the water quality to below the waste water quality standards, and the entire equipment can be made smaller. This is an extremely significant contribution to the development of the industry as it solves the problems of fire extinguishing systems.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 3 are all explanatory layout diagrams showing embodiments of the present invention. 1... Room equipped with electric power equipment, 2... Halogen fire extinguishing system, 5... Exhaust duct, 7.
... Exhaust fan, 8 ... Ventilation pressure loss in which a honeycomb carrier with numerous through holes supports carbonate, hydroxide, or oxide films of calcium, aluminum, magnesium, sodium, and potassium. is 1000T! A
Dry reaction processing section below Aq, 9...Smoke water washing removal section for washing off heavy smoke components with sprayed water.

Claims (1)

[Claims] 1 A halide fire extinguishing device 2 for discharging a halide fire extinguishing agent toward the power equipment is provided in a sealed room 1 equipped with power equipment, and an exhaust duct 5 is provided in the room 1 with an exhaust fan 7 provided at the tip side. In the middle of the exhaust duct 5, there is a ventilation pressure drop in which a honeycomb-shaped carrier having countless through holes supports a film of carbonate, hydroxide, or oxide of calcium, aluminum, magnesium, sodium, or potassium. A dry reaction treatment section 8 having a diameter of 1000 mm or less, and a smoke water washing removal section 9 that uses atomized water to wash away heavy smoke components sent along with the extinguishing exhaust gas treated in the dry reaction treatment section 8. An indoor fire extinguishing system equipped with electric power equipment, which is characterized in that it is installed sequentially.