CN111803828A - Fire extinguishing system for closed coal yard - Google Patents

Abstract

The invention relates to the technical field of fire protection, in particular to a fire protection system for a closed coal yard. The fire protection system for closed coal yard includes: at least one first fire monitor, the first fire monitor is fixedly installed on the grid, and the first fire monitor is set at a height not lower than the first height; the first fire monitor The monitor is adapted to rotate vertically and/or horizontally. In the fire protection system for closed coal yard provided by the present invention, the first fire monitor is fixedly installed on the grid, and the height of the first fire monitor is not lower than the first height, so that the first fire monitor is not lower than the first height. When the gun is spraying water at a long distance, the elevation angle does not need to be too large, and the first fire monitor can rotate in the vertical direction and/or the horizontal direction, so that the coverage is large and the utilization rate is high.

Description

A fire protection system for closed coal yard

technical field

The invention relates to the technical field of fire protection, in particular to a fire protection system for closed coal yards.

Background technique

At present, the types of automatic fire-fighting water cannons on the market are gradually increasing. In the existing technology, automatic fire-fighting water cannons have gradually begun to be popularized and applied in indoor construction places such as shopping malls and hospitals; closed coal yards are used as storage places for dry coal, and a large amount of long-term storage is stored in them. Dry coal is prone to spontaneous combustion in the case of improper storage. Therefore, it is also necessary to arrange automatic fire-fighting water cannons to prevent fires in closed coal yard conditions. However, closed coal yards are usually tall and large spaces, and most of the fire-fighting water cannons equipped are fixed fire-fighting water cannons. At present, most of the fire-fighting water cannons are placed on the coal retaining walls or buttresses around the closed coal yards, which are in-situ fire-fighting monitors. , Take the fire water cannon set on the buttress as an example, the installation height of the buttress is low, the fire monitor can spray the coal pile with a large elevation angle, and it is easy to spray to the ceiling when the elevation angle is too large; The utilization rate of the covered coal yard is low. In order to meet the requirement of full coverage of fire-fighting water cannons, it is usually necessary to increase the number of fire-fighting water cannons in the closed coal yard, resulting in economic waste.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the defects of inappropriate injection angle and high cost of in-situ fire monitor in the prior art, so as to provide a fire protection system for closed coal yard with suitable injection angle and low cost.

In order to solve the above-mentioned technical problems, a kind of fire protection system for closed coal yard provided by the present invention includes:

At least one first fire monitor, the first fire monitor is fixedly installed on the grid, and the set height of the first fire monitor is not lower than the first height;

The first fire monitor is adapted to rotate in a vertical direction and/or a horizontal direction.

Further, the fire protection system for closed coal yard includes at least two first fire monitors arranged opposite to each other along the central axis of the grid frame.

Further, the fire fighting system for a closed coal yard further comprises: at least one second fire monitor, the second fire monitor is arranged at a second height, and the second height is lower than the first height.

Further, the first height is not lower than the height of the highest point of the coal pile; the second height is lower than the height of the highest point of the coal pile.

Further, the fire protection system for the closed coal yard also includes:

Outdoor fire pipeline, suitable for laying outdoors;

The fire introduction pipe is directly or indirectly connected to the outdoor fire pipe;

The fire introduction pipe is communicated with the first fire monitor through a lift pipe, and communicated with the second fire monitor through an on-site branch pipe.

Further, it also includes: an electric valve, which is arranged near the connection between the outdoor fire fighting pipeline and the fire protection inlet pipe, and is suitable for connecting the outdoor fire fighting pipeline and the fire protection inlet pipe in a working state.

Further, a water flow indicator is also provided on the fire inlet pipe.

Further, the first fire monitor includes:

A horizontal motor and/or a vertical motor, the horizontal motor and/or the vertical motor are suitable for controlling the angle adjustment of the gun head.

Further, the first fire monitor further includes: a flame detection device, adapted to detect the ignition point.

Further, the flame detection device includes: an image flame detector, which is suitable for detecting the ignition point of an open flame; and a red-ultraviolet flame detector, which is suitable for detecting the ignition point without an open flame.

The technical scheme of the present invention has the following advantages:

1. The fire protection system for closed coal yard provided by the present invention, by fixing the first fire monitor on the grid, and the setting height of the first fire monitor is not lower than the first height, so that the first fire monitor is not lower than the first height. When the gun is spraying water at a long distance, the elevation angle does not need to be too large, and the first fire monitor can rotate along the vertical direction and/or the horizontal direction, so that the coverage is large and the utilization rate is high.

2. The fire protection system for a closed coal yard provided by the present invention, by arranging the first fire monitor oppositely along the central axis of the grid frame, when the width of the closed coal yard is wide, by using at least two oppositely arranged first fire monitors. The fire monitor is used to ensure the spray distance and ensure that each area of the closed coal yard along the width direction can be covered by the first fire monitor.

3. In the fire protection system for a closed coal yard provided by the present invention, through the cooperation of the first fire monitor and the second fire monitor, each area of the closed coal yard along the width direction can be covered by the first fire monitor It can not only ensure that the coal pile in the closed coal yard is within the fire-extinguishing range, but also ensure that when a fire occurs, the closed coal yard will be protected against fire. The roof area can also be put out in a timely manner to save the damage to a minimum.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is the sectional schematic diagram of the closed coal yard of the present invention;

Fig. 2 is an enlarged view at A in Fig. 1;

Fig. 3 is an enlarged view at B in Fig. 1;

Fig. 4 is an enlarged view at C in Fig. 1;

FIG. 5 is a schematic diagram of the spray angle of the fire monitor of the present invention.

Description of reference numbers:

11-grid, 14-bucket turbine, 15-coal pile; 21-fire introduction pipe, 22-lifting pipe, 23-ring pipe network, 24-fire branch pipe, 25-local branch pipe;

31-First Fire Monitor, 311-Inlet Flange, 312-Horizontal Motor, 313-Cannon Body, 314-Mist Motor, 315-Cannon Head, 316-Locator, 317-Vertical Motor, 35-Flame Detection Device, 351-image flame detector, 352-red and ultraviolet flame detector, 353-mounting bracket;

40-outdoor fire pipeline; 50-valve well, 51-signal butterfly valve, 52-electric valve, 53-water flow indicator, 54-drain valve, 55-local control box; 60-second fire monitor.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate The orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed in a specific orientation. and operation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

1-4, the present embodiment provides a fire protection system for a closed coal yard, including:

At least one first fire monitor 31, the first fire monitor 31 is fixedly installed on the grid 11, and the first fire monitor 31 is set at a height not lower than the first height;

The first fire monitor 31 is adapted to rotate in a vertical direction and/or a horizontal direction.

Preferably, the first height is not lower than the height of the highest point of the coal pile 15 , so as to ensure that the setting height of the first fire monitor 31 is always above the highest point of the coal pile 15 .

Preferably, the first fire monitor 31 is adapted to rotate in a vertical direction and/or a horizontal direction. In this embodiment, the first fire monitor 31 can rotate 360° in the horizontal direction, and can rotate 0 in the vertical direction. °-180° rotation, so that when the first fire monitor 31 is fixedly installed on the grid frame 11 and is not lower than the first height position, long-distance water spraying can be performed, and the coverage area is large.

In the fire protection system for a closed coal yard provided in this embodiment, the first fire monitor 31 is fixedly installed on the grid 11, and the height of the first fire monitor 31 is not lower than the first height, so that the first fire monitor 31 is set at a height not lower than the first height. When a fire monitor 31 sprays water at a long distance, the elevation angle does not need to be too large, and the first fire monitor 31 can rotate in the vertical direction and/or the horizontal direction, so that the coverage is large and the utilization rate is high.

Specifically, the fire protection system for a closed coal yard includes at least two first fire monitors 31 arranged opposite to each other along the central axis of the grid 11 .

In the fire protection system for a closed coal yard provided in this embodiment, by arranging the first fire monitor 31 oppositely along the central axis of the grid 11, when the width of the closed coal yard is relatively wide, at least two oppositely arranged second fire monitors are used. A fire monitor 31 is used to ensure the spray distance and ensure that each area of the closed coal yard along the width direction can be covered by the first fire monitor 31 .

Specifically, the fire protection system for a closed coal yard further includes: at least one second fire monitor 60, the second fire monitor 60 is arranged at a second height, and the second height is lower than the first height.

Specifically, the second height is lower than the height of the highest point of the coal pile 15 .

In the fire protection system for a closed coal yard provided in this embodiment, through the cooperation of the first fire monitor 31 and the second fire monitor 60 , each area of the closed coal yard along the width direction can be protected by the first fire monitor 31 In addition, the ceiling area of the closed coal yard can also be within the coverage area of the second fire monitor 60, which can not only ensure that the coal pile 15 in the closed coal yard is within the fire-extinguishing range, but also ensure that when a fire occurs, the The roof area of the closed coal yard can also be put out in a timely manner to reduce the loss to a minimum.

With reference to Figure 5, it is a schematic diagram of the spray angle of the fire monitor, which takes the spray angles of the fire monitor at -8°, 0°, 10°, and 30° as examples to illustrate the spray coverage; The cooperation between the first fire monitor 31 and the second fire monitor 60 enables each area of the closed coal yard along the width direction to be within the coverage of the first fire monitor 31, and the ceiling area of the closed coal yard can also be In the coverage area of the second fire monitor 60, it can not only ensure that the coal pile 15 in the closed coal yard is within the fire extinguishing range, but also ensure that when a fire occurs, the ceiling area of the closed coal yard can also be extinguished and rescued in time. losses are minimized.

Specifically, the fire protection system for a closed coal yard further includes:

The outdoor fire fighting pipeline 40 is suitable for laying outdoors;

The fire introduction pipe 21 is directly or indirectly connected to the outdoor fire pipe 40;

The fire introduction pipe 21 communicates with the first fire monitor 31 through the lift pipe 22 , and communicates with the second fire monitor 60 through the local branch pipe 25 .

Preferably, the outdoor fire fighting pipes 40 are usually buried underground, which can save space on the ground on the one hand, and ensure that the outdoor fire fighting pipes 40 are protected by the soil layer on the other hand. Freezing does not occur.

Preferably, the fire protection introduction pipe 21 is suitable for at least part of the arrangement inside the grid 11, and keeps the interior empty in a non-working state; the fire protection introduction pipe 21 is at least partially exposed to the ground, which is similar to the conventional fire protection introduction The pipe 21 needs to be insulated with rock wool. In this embodiment, the fire inlet pipe 21 does not need to be insulated with rock wool or other thermal insulation materials, and the interior of the fire inlet pipe 21 is kept empty in the non-working state, thereby avoiding the fire inlet pipe 21. When the temperature in the northern cold region or even the extremely cold region is low, the internal freezing phenomenon occurs to ensure that the fire protection system can still operate normally when the temperature is too low.

It should be noted that the non-working state refers to a state in which no fire occurs in the closed coal yard and the fire protection system is not activated. Correspondingly, the working state refers to the state in which a fire occurs in a closed coal yard and the fire protection system is activated.

Specifically, it also includes: an electric valve 52, which is arranged near the connection between the outdoor fire protection pipeline 40 and the fire protection introduction pipe 21, and is suitable for guiding the outdoor fire protection pipeline 40 and the fire protection introduction pipe 21 under working conditions. Pass.

By setting the outdoor fire protection pipeline 40 and the fire protection introduction pipe 21 separately, and connecting the outdoor fire protection pipeline 40 and the fire protection introduction pipe 21 through the electric valve 52, the interior of the fire protection introduction pipe 21 is kept empty in the non-working state, avoiding freezing pipes, and Open the electric valve 52 in the working state to make the outdoor fire protection pipeline 40 and the fire protection inlet pipe 21 conduct, so that the water in the outdoor fire protection pipeline 40 quickly fills the fire protection inlet pipe 21, so as to facilitate the fire fighting and avoid the fire protection inlet pipe exposed to the ground. 21. The thermal insulation measures adopted are not effective, resulting in freezing pipes and affecting the use of fire protection.

In the fire protection system for a closed coal yard provided by this embodiment, the fire protection introduction pipe 21 does not need to be insulated with rock wool or other thermal insulation materials. can operate normally.

Specifically, the fire protection introduction pipe 21 includes: a lift pipe 22 and a local branch pipe 25 .

Preferably, the fire protection inlet pipe 21 is directly or indirectly connected to the outdoor fire protection pipeline 40. In this embodiment, the fire protection inlet pipe 21 is directly connected to the outdoor fire protection pipeline 40, and the electric valve 52 is arranged at On the fire inlet pipe 21, and the electric valve 52 is arranged at a position close to the outdoor fire protection pipeline 40, so that after the electric valve 52 is opened, the water in the outdoor fire protection pipeline 40 can flow into the outdoor fire quickly. The fire protection is introduced into the pipe 21 .

Preferably, the electric valve 52 is arranged in the valve well 50 .

Preferably, the lift pipe 22 is in communication with the annular pipe network 23 . Specifically, the annular pipe network 23 is configured as an annular pipe connected to each other at the ends. By constructing the annular pipe network 23 into a ring shape, the annular pipe network 23 can be arranged around the top of the grid 11 , and at the same time, it can supply water to a plurality of the first fire monitors 31 at the same time, so as to ensure the effective fire fighting area. Sex and coverage.

Preferably, the lift pipe 22 conducts the fire protection introduction pipe 21 with the annular pipe network 23 , so that the fire protection introduction pipe 21 buried under the ground can be connected to the annular pipe network arranged on the top of the grid 11 . 23 conducts conduction, which is convenient for supplying water to the annular pipe network 23.

Specifically, a plurality of fire branch pipes 24 are connected to the annular pipe network 23 .

Specifically, the fire branch pipe 24 is connected with the first fire monitor 31 .

By connecting the fire branch pipe 24 on the annular pipe network 23, and placing the first fire monitor 31 in the fire branch pipe 24, the first fire monitor 31 can be arranged at any required position on the top of the grid 11, and each group can be arranged as required. The fire branch pipe 24 and the first fire monitor 31 are individually controlled.

Specifically, the annular pipe network 23 is provided with a number of exhaust valves, and the exhaust valves are arranged at the highest part of the annular pipe network 23 to facilitate the circulation of water to the annular pipe network 23 when the annular pipe network 23 passes through water. The air in 23 is quickly evacuated.

Specifically, the fire inlet pipe 21 is also provided with a water flow indicator 53 .

Preferably, the fire inlet pipe 21 is also provided with a signal butterfly valve 51 and a local control box 55.

Preferably, a drain valve 54 is also provided on the fire inlet pipe 21 . The drain valve 54 is suitable for emptying the fire inlet pipe 21 after the electric valve 52 is closed.

Preferably, the drain valve 54 is adapted to stop the water supply of the outdoor fire protection pipeline 40 to the fire protection inlet pipe 21 after the electric valve 52 is closed, and to empty the remaining water in the fire protection inlet pipe 21, which is convenient for reuse. . Preferably, the drain valve 54 is arranged on the fire inlet pipe 21 , preferably at the lowest position of the fire inlet pipe 21 , so as to facilitate emptying the water in the fire inlet pipe 21 and avoid residues.

Specifically, the first fire monitor 31 includes:

The horizontal motor 312 and/or the vertical motor 317, the horizontal motor 312 and/or the vertical motor 317 are suitable for controlling the angle adjustment of the gun nose 315.

Specifically, the first fire monitor 31 further includes: a flame detection device 35, which is adapted to detect the ignition point.

Specifically, the flame detection device 35 includes: an image flame detector 351, which is suitable for detecting the ignition point of an open flame; and a red-ultraviolet flame detector 352, which is suitable for detecting the ignition point without an open flame. By arranging the image flame detector 351 and the red-ultraviolet flame detector 352 at the same time, the ignition point of the open flame can be found in time, and the ignition point of no open flame can be detected at the same time, so as to ensure that more coal is stored in the coal factory and the temperature is too high. When it is high, in the case of internal spontaneous combustion that does not produce a flame, the ignition point can be found in time, and then corresponding fire-fighting and cooling measures can be taken to improve the safety of the coal yard. In coal mines, thermal power plants, thermal power plants and other places where coal needs to be stored and turned over, the long-term contact between coal and air will cause an oxidation reaction to release heat. Slow, poor ventilation, resulting in the accumulation of internal heat, the temperature inside the coal pile is getting higher and higher, when the temperature exceeds the spontaneous ignition point of coal, spontaneous combustion will occur, causing great damage to personnel and equipment. Therefore, it is necessary to set the image flame detector 351 and the red-ultraviolet flame detector 352 at the same time to seal the coal yard.

The closed coal yard is usually closed with a grid structure, which presents an arc-shaped arrangement as a whole, and its span often exceeds the range of a single fire monitor. There are coal piles 15 in the areas on both sides, and the coal piles 15 have a certain height, which further blocks the injection route of a single fire monitor. Ensure that all areas in the width direction of the enclosed coal yard can be included in the range of the fire monitor. And further, while ensuring that all areas of the closed coal yard in the width direction can be included in the range of the fire monitor, a group of fire monitors is set at a distance in the length direction of the closed coal yard, so as to ensure that the closed coal yard is in the length of the closed coal yard. All areas in the direction can also be included in the range of the fire monitor, so that the entire closed coal yard can be covered without dead ends.

Further, the first fire monitor 31 is installed under the horse track on both sides of the central axis of the grid 11 . The maintenance horse road is an indispensable component for the implementation of the fully enclosed coal bunker. For the fully enclosed coal bunker, its height is generally 20-50 meters, and the lighting lamps are generally arranged longitudinally on both sides of the top of the coal bunker. The top of the silo is high, and there is a coal pile below, so it is impossible to use ladders, lifts, etc. for maintenance. Therefore, the maintenance of horse lanes must be considered in the design to facilitate maintenance problems in future operations. Therefore, installing the fire monitor under the horse track is convenient for daily maintenance and repair, and it is also convenient for workers to control the fire monitor on the spot when the fire is discovered, so as to ensure the timely firefighting.

Preferably, a plurality of maintenance gate valves are provided on the annular pipe network 23, and routine maintenance and maintenance of the annular pipe network 23 are facilitated by setting the maintenance gate valves.

Specifically, the fire protection system for a closed coal yard further includes a local control box 55 , and the fire monitor is electrically connected to the local control box 55 . The control of the fire monitor by the on-site control box 55 can facilitate the workers to control the fire monitor on the spot when a fire is found, so as to ensure the timeliness of fire extinguishing.

Specifically, the fire fighting system for a closed coal yard further includes a wireless remote controller, and the fire monitor is connected to the wireless remote controller in communication, and the control of the fire monitor by the wireless remote controller can facilitate the workers to respond to the fire when they discover the fire. The fire monitor is remotely controlled to ensure the timeliness of fire extinguishing, and at the same time, it can ensure that workers can control the fire monitor from a long distance to ensure safety.

As a variety of implementation forms, on the one hand, the fire protection system for a closed coal yard of the present invention can realize a fully automatic fire extinguishing function. When a fire occurs in any area in the closed coal yard, the image flame detector 351 and/or the red The ultraviolet flame detector 352 quickly sends alarm information to the fire detection and alarm system. According to the location of the alarm area, the system automatically scans the image to locate and point to the fire source, and starts the fire monitor to extinguish the fire. On the other hand, the fire-fighting system for the enclosed coal yard of the present invention can realize the function of remote control of fire extinguishing. When the fire detection system in the enclosed coal yard automatically alarms, and the fire situation is confirmed by the industrial TV monitoring system or manually, the on-duty personnel will Through the monitoring system, the control center uses the centralized control cabinet of the fire monitor to remotely control the fire monitor in the fire area to implement the fire extinguishing function. On the other hand, the fire protection system for a closed coal yard of the present invention can manually control the fire-extinguishing function on site.

2 and 3, the first fire monitor 31 specifically includes:

an inlet flange 311, the inlet flange 311 is connected to the fire branch pipe 24, and serves as the water inlet of the first fire monitor 31;

The gun body 313, the gun body 313 serves as the main body part of the first fire monitor 31 and is suitable for carrying other components;

The cannon head 315, the cannon head 315 is suitable for spraying the water flow;

The horizontal motor 312 and the vertical motor 317, the horizontal motor 312 and the vertical motor 317 control the angle adjustment of the gun head 315, so as to align the ignition point for spraying;

The mist injection motor 314, the mist injection motor 314 can make the injected water flow infinitely switch between the direct current and the spray state;

A locator 316, the locator 316 is used for locating the first fire monitor 31 to facilitate control.

The fire monitor of the present invention realizes the fire extinguishing work in the closed coal yard through the cooperation of various components, and through the communication connection with the flame detection device 35, the local control box, the centralized control cabinet, the monitoring system, etc. to ensure the timeliness. ,safety.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. A fire protection system for closed coal yard is characterized in that, comprising: At least one first fire monitor (31), the first fire monitor (31) is fixedly installed on the grid (11), and the first fire monitor (31) is set at a height not lower than the first height; The first fire monitor (31) is adapted to rotate in a vertical direction and/or a horizontal direction. 2. The fire protection system for a closed coal yard according to claim 1, characterized in that the fire protection system for a closed coal yard comprises at least two first fire monitors (31) disposed opposite to each other along the central axis of the grid (11). ). 3. The fire fighting system for a closed coal yard according to claim 2, characterized in that the fire fighting system for a closed coal yard further comprises: at least one second fire monitor (60), the second fire monitor (60) is arranged at a second height, and the second height is lower than the first height. 4. The fire protection system for a closed coal yard according to claim 3, wherein the first height is not lower than the height of the highest point of the coal pile (15); the second height is lower than the coal pile (15) The height of the highest point. 5. The fire protection system for closed coal yards according to claim 3, wherein the fire protection system for closed coal yards further comprises: An outdoor fire fighting pipeline (40), suitable for laying outdoors; The fire introduction pipe (21) is directly or indirectly connected to the outdoor fire pipe (40); The fire introduction pipe (21) communicates with the first fire monitor (31) through a lift pipe (22), and communicates with the second fire monitor (60) through a local branch pipe (25). 6. The fire protection system for a closed coal yard according to claim 5, characterized in that it further comprises: an electric valve (52) close to the connection between the outdoor fire protection pipeline (40) and the fire protection introduction pipe (21) The setting is suitable for connecting the outdoor fire protection pipeline (40) with the fire protection introduction pipe (21) in a working state. 7. The fire protection system for a closed coal yard according to claim 6, characterized in that, a water flow indicator (53) is further provided on the fire protection introduction pipe (21). 8. The fire protection system for a closed coal yard according to any one of claims 1-7, wherein the first fire monitor (31) comprises: A horizontal motor (312) and/or a vertical motor (317), the horizontal motor (312) and/or the vertical motor (317) are adapted to control the nozzle (315) for angle adjustment. 9. The fire protection system for a closed coal yard according to claim 8, characterized in that the first fire monitor (31) further comprises: a flame detection device (35), which is adapted to detect the ignition point. 10. The fire protection system for a closed coal yard according to claim 9, wherein the flame detection device (35) comprises: an image flame detector (351), adapted to detect the ignition point of an open fire; and a red-ultraviolet The flame detector (352) is suitable for detecting the ignition point of no open flame.

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