Device to prevent spontaneous combustion of coal piles

Abstract

A device for preventing a coal pile from spontaneously igniting. At present, in order to prevent a coal pile from spontaneously igniting, most technologies use heat pipes to dissipate heat from the coal pile. However, the pipes of commonly used heat pipes are fixed in position, have low flexibility, consume manpower, and cannot monitor the temperature of the coal pile. The utility model comprises a plurality of evenly arranged water spraying devices (6) for spraying a water-gas mixture on a coal pile, a water tank (1) and a gas tank (3). The top of each of the water spraying devices is connected to a water supply pipe (5) through a solenoid valve (62). The water outlet pipe of the water tank is connected to a mixing box (9). The water outlet pipe of the mixing box is connected to a water distribution pipe (4) through a water pump (10). The water distribution pipe is connected to the water supply pipe. The ventilation pipe (8) of the gas tank is divided into two branches, which are respectively connected to the bottom of the mixing box. The utility model is used to prevent a coal pile from spontaneously igniting.

Description

Technical Field

[0001] The utility model relates to a device for preventing a coal pile from spontaneously combusting. Background Art

[0002] How to prevent the loss of calorific value of raw coal during storage in the coal yard management of power plants is of great significance for energy conservation and emission reduction. Therefore, it is necessary to detect the temperature of the coal pile and take cooling measures when the temperature of the coal pile is too high. At present, in order to prevent the spontaneous combustion of the coal pile, most technologies use heat pipes to dissipate heat from the coal pile, but the commonly used heat pipes have fixed connection positions, low flexibility, and are labor-intensive, and cannot complete temperature monitoring of the coal pile. Therefore, it is very necessary to develop a technology that is highly flexible and efficient to prevent the spontaneous combustion of coal piles. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned problems and provide a device for preventing spontaneous combustion of coal piles.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A device for preventing a coal pile from spontaneous combustion, comprising a plurality of uniformly arranged water spray devices, a water tank and a gas tank for spraying a water-gas mixture on the coal pile, the top of each water spray device being connected to a water supply pipe through a solenoid valve, the water outlet pipe of the water tank being connected to a mixing box, the water outlet pipe of the mixing box being connected to a water distribution pipe through a water pump, and the water distribution pipe being connected to the water supply pipe;

[0006] The ventilation pipe of the gas tank is divided into two branches which are respectively connected to the bottom of the mixing box.

[0007] The device for preventing spontaneous combustion of coal piles, the water spraying device includes a horizontal water pipe and a longitudinal water pipe, the horizontal water pipe is arranged vertically and crosswise with the longitudinal water pipe and is connected, the horizontal water pipe is respectively fixed with horizontal water spraying heads on the front and rear sides along the length direction, and the longitudinal water pipe is respectively fixed with longitudinal water spraying heads on the left and right sides along the length direction.

[0008] The device for preventing the coal pile from spontaneous combustion is characterized in that a side tube is fixed on the longitudinal water pipe, a round hole is provided at the bottom of the side tube, and a temperature sensor is placed in the side tube.

[0009] The device for preventing spontaneous combustion of coal piles comprises a mixing box comprising a box body, one end of the box body is provided with a water inlet pipe, the other end is provided with a water outlet pipe, and the bottom end of the side of the box body is provided with two ventilation pipes.

[0010] The device for preventing the coal pile from spontaneous combustion has transverse baffles fixed above and below each transverse water spray head.

[0011] The device for preventing the coal pile from spontaneous combustion has longitudinal baffles fixed above and below each longitudinal water spray head. Beneficial Effects

[0012] 1. The utility model arranges the water spray device in the oxidation layer of the entire coal pile, and a temperature sensor is installed at each water spray device. When the temperature is 5-15°C different from the auto-ignition temperature of the coal pile, the valve on the ventilation pipe can be opened to allow the carbon dioxide gas in the gas tank to enter the mixing box, and the water supply pump pumps the water in the water tank into the mixing box. The water enters the mixing box and mixes with the carbon dioxide gas to form carbonic acid. The carbonic acid is pumped out to the water distribution pipe through the water pump, and then enters the water supply pipe, and then enters each water spray device to spray carbonic acid, which can effectively perform flame retardancy under the dual effects of carbon dioxide inert gas and water.

[0013] 2. In the utility model, each water spray device is provided with a solenoid valve at the connection between the water supply pipe and the water spray device. The solenoid valve can be controlled to open or close according to the temperature sensor on the water spray device, thereby improving the accuracy of its flame retardancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 A top view of the water spraying device;

[0016] Figure 3 It is the front view of the water spraying device;

[0017] Figure 4 is a side view of the water spray device;

[0018] Figure 5 for Figure 2 A magnified view of part A;

[0019] Figure 6 It is a structural schematic diagram of a mixing box;

[0020] In the figure: 1. water tank; 2. water supply pump; 3. gas tank; 4. water distribution pipe; 5. water supply pipe; 6. water spraying device; 7. valve; 8. ventilation pipe; 9. mixing box; 10. water pump; 61. horizontal water pipe; 62. solenoid valve; 63. horizontal baffle; 64. horizontal water spray head; 65. side tube; 66. temperature sensor; 67. longitudinal water pipe; 68. longitudinal baffle; 69. longitudinal water spray head; 91. water inlet pipe; 92. box body; 93. ventilation port; 94. water outlet pipe. DETAILED DESCRIPTION

[0021] Reference Figure 1-Figure 6, a device for preventing spontaneous combustion of coal piles, which comprises a plurality of uniformly arranged water spraying devices 6 for spraying water-gas mixture on the coal piles, a water tank 1 and a gas tank 3, the top of each of the water spraying devices is connected to a water supply pipe 5 through a solenoid valve 62, the water outlet pipe of the water tank is connected to a mixing box 9, the water outlet pipe of the mixing box is connected to a water distribution pipe 4 through a water pump 10, and the water distribution pipe is connected to the water supply pipe;

[0022] The ventilation pipe 8 of the gas tank is divided into two branches which are respectively connected to the bottom of the mixing box. A valve 7 is installed on the ventilation pipe to open the ventilation pipe. The gas tank contains compressed carbon dioxide gas.

[0023] The water spray device includes a horizontal water pipe 61 and a longitudinal water pipe 67. The horizontal water pipe is arranged perpendicularly and crosswise with the longitudinal water pipe and is connected. The horizontal water pipe is respectively fixed with horizontal water spray heads 64 on the front and rear sides along the length direction. The longitudinal water pipe is respectively fixed with longitudinal water spray heads 69 on the left and right sides along the length direction. A horizontal baffle 63 is fixed above and below each horizontal water spray head. A longitudinal baffle 68 is fixed above and below each longitudinal water spray head. Since each horizontal water spray head and longitudinal water spray head are located below the coal pile, the horizontal water spray head and the longitudinal water spray head can be protected by setting the horizontal baffle and the longitudinal baffle.

[0024] A side tube 65 is fixed on the longitudinal water pipe, the bottom of the side tube has a round hole, and a temperature sensor 66 is placed in the side tube.

[0025] The mixing box comprises a box body 92, one end of the box body is provided with a water inlet pipe 91, the other end is provided with a water outlet pipe 94, the side bottom end of the box body is provided with two vents 93, and two branches of the vent pipe are connected to the vents.

[0026] Working principle: Each water spray device is installed with a temperature sensor, which monitors the temperature in the coal pile. When the temperature differs from the auto-ignition temperature of the coal pile by 5-15℃, the valve on the ventilation pipe can be opened to allow the carbon dioxide gas in the gas tank to pass into the mixing box. At the same time, the water supply pump draws the water in the water tank into the mixing box. The water enters the mixing box and mixes with the carbon dioxide gas to form carbonic acid. The carbonic acid is pumped out to the water distribution pipe through the water pump, and then enters the water supply pipe, and then enters each water spray device to spray carbonic acid. It can effectively retard the flame under the dual effects of carbon dioxide inert gas and water. At the same time, the temperature sensor of each water spray device is linked with the solenoid valve. When the temperature of the temperature sensor at a certain position reaches the range of 5-15℃ difference from the auto-ignition temperature, the solenoid valve on this water spray device is controlled to open at the same time. If the temperature sensors of the other water spray devices do not monitor the temperature that differs from the auto-ignition temperature by 5-15℃, the solenoid valve is closed at this time, and carbonic acid can be sprayed in a targeted manner for flame retardancy.

Claims

1. A device for preventing spontaneous combustion of coal piles, characterized in that: The composition includes a plurality of uniformly arranged water spraying devices, a water tank and a gas tank for spraying a water-gas mixture on a coal pile, the top of each water spraying device is connected to a water supply pipe through a solenoid valve, the water outlet pipe of the water tank is connected to a mixing box, the water outlet pipe of the mixing box is connected to a water distribution pipe through a water pump, and the water distribution pipe is connected to the water supply pipe; The ventilation pipe of the gas tank is divided into two branches which are respectively connected to the bottom of the mixing box.

2. The device for preventing spontaneous combustion of coal pile according to claim 1 is characterized in that: The water spraying device includes a transverse water pipe and a longitudinal water pipe. The transverse water pipe is arranged perpendicularly to and connected with the longitudinal water pipe. The transverse water pipe is respectively fixed with transverse water spraying heads on the front and rear sides along the length direction, and the longitudinal water pipe is respectively fixed with longitudinal water spraying heads on the left and right sides along the length direction.

3. The device for preventing spontaneous combustion of coal pile according to claim 2 is characterized in that: A side tube is fixed on the longitudinal water pipe, a round hole is provided at the bottom of the side tube, and a temperature sensor is placed in the side tube.

4. The device for preventing spontaneous combustion of coal pile according to claim 1 is characterized in that: The mixing box comprises a box body, one end of the box body is provided with a water inlet pipe, the other end is provided with a water outlet pipe, and the bottom end of the side of the box body is provided with two vents.

5. The device for preventing spontaneous combustion of coal pile according to claim 2 is characterized in that: A transverse baffle is fixed above and below each transverse water spray head.

6. The device for preventing spontaneous combustion of coal pile according to claim 2 is characterized in that: A longitudinal baffle is fixed above and below each longitudinal water spray head.

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