KR20190046363A - Fire extinguishing equipment suitable for use in oil facilities - Google Patents

Abstract

The present invention relates to a foam fire-extinguishing equipment proper to be used in oil facilities, which is an equipment installed in oil facilities of a power generation equipment for a steel mill to extinguish fire in a protected district, and is able to solve a problem of a reverse flow to an agent storage tank, closing of a siphon pipe, and a lowered pressure of foam fire-extinguishing water in a foam fire-extinguishing line. According to the present invention, in the foam fire-extinguishing equipment, an agent mixing apparatus, which mixes general fire-extinguishing water with an agent to produce and supply foam fire-extinguishing water, is installed on a foam fire-extinguishing line extended from a fire-extinguishing pump. The agent mixing apparatus comprises: an agent storage tank; an agent transfer line extended from the agent storage tank; an agent mixing pipe installed on the foam fire-extinguishing line to be connected to a siphon pipe branched from the agent transfer line; and a reverse flow prevention valve installed on the agent transfer line.

Description

[0002] Fire extinguishing equipment suitable for use in oil facilities [0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fogging apparatus, and more particularly, to a fogging apparatus capable of preventing reverse flow to a chemical storage tank, preventing the closing of a siphon tube, It relates to fire extinguishing facilities.

Foaming plant is a facility used for fires such as flammable liquids, which are less effective as a result of water extinguishing or are dangerous to spread fire. The foamed water, which is a mixture of water and foaming agent at a certain ratio, is foamed by air, and the aggregate of fine bubbles formed by covering the surface of the combustible material blocks the air and thereby suffocates the fire. do. It is also suitable for large-scale fire extinguishing and is also effective for outdoor fire extinguishing. These foam plants are used for oil handling facilities in power plants in steelworks.

When a fire occurs, the fire extinguisher is operated by the driver's operation, and the pumped fire exits through the check valve and the stop valve of the outlet pipe of the pump and is sent to the chemical mixing device along the fire line. That is, the digested water passes through the main valve and passes through the chemical mixing pipe. When the digestion water passes through the chemical mixing pipe, the medicine in the chemical storage tank is sucked through the siphon tube by the speed and pressure difference, , Through the stop valve at the exit of the mixing pipe, to the line headers, and from the line header to each guard area.

During the operation of such a conventional fire-fighting facility, backwashing of digested water often occurs through a siphon tube, causing the digestion water to flow into the chemical storage tank, resulting in a change in the physical properties of the drug, The fire suppression was hindered, and when the refluxed water was filled in the chemical storage tank, there was a problem that the chemical was ejected through the open entrance (not shown) at the top of the chemical storage tank. In addition, due to the residual drug in the siphon tube, the closing of the siphon tube frequently occurred, which caused problems with the normal operation of the poofing equipment. On the other hand, when the digestion pump is pumped, the digestive water line that transfers only the general digestion water is also fed by the digestive water and the pressure is dispersed. Therefore, when the fire occurs in a high area, the pressure of the digestive water There were also problems that could not be solved.

Disclosure of the Invention The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for preventing the backflow into the medicine storage tank, A stop valve is provided to selectively shut off the transfer of the extinguishing water to the extinguishing water line at a point where the extinguishing water line and the extinguishing water line are branched, Facilities.

In order to accomplish the above object, the present invention provides a spraying apparatus comprising: a chemical mixing device for mixing and supplying a chemical to a general digestion water and supplying the water to the spraying water; Wherein the chemical mixing device comprises a chemical storage tank, a chemical transfer line extending from the chemical storage tank, a chemical mixing pipe installed on the chemical transfer line and connected to a siphon tube branched from the chemical transfer line, And a backflow prevention valve installed in the medicine transfer line to prevent backflow into the medicine storage tank. Preferably, a chemical shutoff valve is installed in the medicine transfer line between the medicine storage tank and the check valve. The digestion water line is branched to the general digestion line for separately transferring only the general digestion water. The digestion water line is connected to the digestion water line for interrupting the transfer of the general digestion water, Preferably, a shut-off valve is provided.

A cleaning line for supplying general digestion water is provided between the foam line and the medicine transfer line so that the medicine remaining in the medicine transfer line can be cleaned, and a discharge line for discharging the waste water generated after cleaning And a cleaning cap is installed at an end of the chemical transfer line so as to confirm the cleaning state after cleaning.

According to the present invention, since the line structure of the chemical mixing device is changed, the back flow to the chemical storage tank can be prevented, and the cleaning line, which can clean the siphon tube, A stop valve capable of selectively interrupting the transfer of the extinguishing water to the extinguishing water line is provided at a point where the extinguishing water line and the extinguishing water line are branched, Can be prevented.

 The spraying apparatus according to an embodiment of the present invention includes a spraying line extending from the fire extinguishing pump and a chemical mixing device installed in the spraying line. The pump line outlet blocking valve and the pump outlet blocking valve are installed at the outlet side of the fire extinguishing pump and the chemical mixing device is installed between the fire extinguishing pump and the line header . The medicament mixing apparatus includes a medicament mixing tube to be described later, which is directly connected to the sponge line by flange connection. Meanwhile, between the pump outlet shutoff valve and the chemical mixing pipe, a water shutoff valve is provided, and a header inlet backflow prevention valve and a header inlet shutoff valve are installed between the chemical mixing pipe and the line header.

The medicine mixing device includes a medicine storage tank, a medicine transfer line, a siphon tube, a medicine mixing tube, and a check valve. The medicine transfer line extends from the lower portion of the medicine storage tank, and the siphon tube is drawn out from the medicine transfer line in the vertical direction, and a pair of siphon tubes are drawn out at a predetermined interval. The siphon tube is connected to the lower end of the chemical mixing apparatus, and the chemical mixing apparatus is installed in the poisoning line. Therefore, when general digestion water flows into the chemical mixing apparatus, medicines stored in the chemical storage tank due to the difference in speed and pressure can be introduced into the chemical mixing apparatus through the siphon tube and mixed with the purified water. On the other hand, it is preferable that a check valve is installed in the medicine transfer line, and a check valve is used as the check valve. Such a check valve prevents the general digestion water or the phos- phorous water from flowing back to the chemical storage tank through the siphon pipe from the chemical mixing device. Further, a medicine shutoff valve is additionally provided between the medicine storage tank and the backflow prevention valve, and a stop valve is preferably used as the medicine shutoff valve. Such a medicine shut-off valve is installed to prevent the outflow of the medicine from the medicine storage tank during maintenance or emergency.

On the other hand, the digestion water line is branched to the digestion water line, the digestion water line is provided in the digestion water line, and the digestion water line is branched A backflow prevention valve for preventing reverse flow is installed. Accordingly, the general extinguishing water feed to the extinguishing water line is interrupted by the extinguishing water shutoff valve, and in the presence of the intermittent speed, the dispersion of the pressure is blocked so that the pressure drop of the foamed water in the foam line can be prevented . Meanwhile, a cleansing line is drawn out between the point where the extinguishing water line is branched and the foamable water shutoff valve, and is connected to the medicine conveyance line, and is connected between the pair of phytoplains, Respectively. Here, the spray line is provided with a discharge valve for discharging wastewater generated after cleaning through the cleaning line, and is installed between the medicine mixing pipe and the header inlet backflow prevention valve. The discharge valve is used not only for discharging the wastewater generated after cleaning through the cleaning line but also for checking the concentration of the hydrofluoric acid mixed by the chemical mixing pipe. Further, a cleaning cap is provided at an end of the cleaning line so as to confirm the cleaning state after cleaning through the cleaning line. Preferably, the cleaning cap is formed so as to be screwed with the cleaning line and repeatedly joined or separated.

A medicine level meter including a transparent level pipe is installed on the side of the medicine storage tank so that the remaining amount of the medicine can be easily confirmed from the outside, and a medicine inlet and a breather are installed on the medicine storage tank.

Hereinafter, the operation of the foamer according to the embodiment of the present invention will be described. When a fire occurs in the oil-handling facility of the steel mill power generation facility, the driver locks the fire-extinguishing water shut-off valve, which opens the fire extinguishing water shut-off valve and the pump exit shut-off valve, and activates the fire extinguishing pump . Then, the pumped extinguishing water is not transferred in the direction of the arrow but is transported only in the direction of the arrow. The digested water conveyed in the direction of the arrow passes through the chemical mixing pipe. At this time, the medicine stored in the medicine storage tank is transferred to the siphon tube along the medicine transfer line by the speed and pressure difference, and is introduced into the medicine mixing tube through the siphon tube and mixed with the digested water in the medicine mixing tube. This mixed water is passed through a discharge valve through which the operator can check the concentration of the water. Subsequently, the foamed water passing through the discharge valve is transferred to the line header through the header inlet backflow prevention valve and the header inlet isolation valve, where it is transferred to the corresponding protection zone (fire generation zone) and installed in the corresponding protection zone Fire hydrant is sprayed into fire area by fire hose or tarpaulin. In this process, unlike in the prior art, the medicines in the medicament storage tank are introduced into the medicament mixing line via the separate pharmacopoe- cial transfer line and the anti-reflux valve is installed in the medicament transfer line. Therefore, The backflow into the storage tank can be prevented.

On the other hand, after the digestion work is completed, the medicine shutoff valve is closed to clean the medicine transfer line and the residual medicine in the siphon tube, the cleansing water shutoff valve installed in the cleansing line is opened, and then the digestion pump is operated to clean. Thereafter, the discharge valve is opened to discharge the waste water, the fire pump is stopped, and the cleaning cap is opened to confirm the cleaning state. This ends the extinguishing and cleaning operations. This cleaning operation is intended to prevent the closing of the siphon tube.

When the spraying facility according to the present invention as described above is applied, the backflow to the medicine storage tank can be prevented, the closing of the siphon tube can be prevented, and the pressure drop of the sprayed water can be prevented . It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It needs to be understood.

Claims (2)

A phar- maceutical mixing apparatus in which a chemical mixing device for mixing pharma- ceutical water with general digestion water and supplying the phar- genized water to a pho- tohtation water is installed on a phos- phorization line extending from a digestion pump, the phar- maceutical mixing device comprising a medicine storage tank, A drug mixing tube extending from the tank, a drug mixing tube provided on the capsule filling line and connected to a siphon tube branched from the drug transferring line, and a check valve provided on the drug conveying line, Wherein the backflow into the tank is prevented. [Claim 4] The fodder plant according to claim 1, wherein the medicine transfer line is provided with a medicine shutoff valve between the medicine storage tank and the check valve.