A safety guard for a coal mill

Abstract

The utility model relates to a coal mill technical field especially, relates to a kind of safety protection device for coal mill.The utility model provides a kind of can carry out inert gas protection to coal mill, and can control the entering temperature of inert gas, avoid the work environment temperature fluctuation of coal mill to cause the output drop of safety protection device for coal mill.A kind of safety protection device for coal mill, including first connecting pipe and coil pipe etc., first connecting pipe left side is connected with coil pipe.The utility model can effectively exchange heat with outside by coil pipe, and by fan on first fixing frame, the boiler flue gas in coil pipe can be cooled, when winter environment temperature drops, heating plate can be started, flue gas is heated, reaches can carry out inert gas protection to coal mill, and can control the entering temperature of inert gas, avoid the work environment temperature fluctuation of coal mill to cause the output drop effect.

Description

Technical Field

[0001] This utility model relates to the field of coal mill technology, and in particular to a safety protection device for a coal mill. Background Technology

[0002] When grinding coal, the coal mill produces a large amount of coal powder. Coal powder has a large specific surface area and can burn violently or even explode under certain concentration and conditions. Therefore, inert gas is introduced into the coal mill during operation to isolate it from the air and prevent explosion accidents during operation.

[0003] The existing inert gas protection of coal mills mainly utilizes the flue gas produced after boiler combustion. Since the gases produced by boiler combustion are nitrogen and carbon dioxide, they can provide excellent inert gas protection. However, the waste heat of boiler flue gas is relatively high, and the temperature of the inert gas entering in winter or in northern regions is too low, which will affect the working environment temperature of the coal mill. Both excessively high and excessively low temperatures will reduce the output of the coal mill, which is quite inconvenient.

[0004] Therefore, a safety protection device for coal mills has been developed that can provide inert gas protection and regulate the inert gas inlet temperature to prevent output reduction caused by fluctuations in the working environment temperature of the coal mill. Utility Model Content

[0005] To overcome the shortcomings of existing inert gas protection for coal mills, which affects the working environment temperature of the coal mill and reduces the output of the coal mill due to excessively high or low temperatures, this utility model provides a safety protection device for coal mills that can provide inert gas protection and regulate the inert gas entry temperature to avoid the output reduction caused by fluctuations in the working environment temperature of the coal mill.

[0006] The technical solution is: a safety protection device for a coal mill, comprising a first connecting pipe, a coil, a first connecting frame, a second connecting pipe, a first fixed frame, a fan, a second fixed frame, and a heating plate. The first connecting pipe is connected to the coil on its left side, and the coil is connected to the second connecting pipe on its left side. The coil is connected to two first connecting frames on its left and right sides. The front sides of the first connecting frames are detachably connected to the first fixed frames. The first fixed frames are equipped with multiple fans. The rear sides of the first connecting frames are detachably connected to the second fixed frames. The second fixed frames are detachably connected to the heating plates.

[0007] Furthermore, the right side of the second connecting pipe has a trumpet-shaped structure.

[0008] Furthermore, both the first connecting pipe and the second connecting pipe are equipped with flanges.

[0009] Furthermore, the coil is made of copper.

[0010] Furthermore, it also includes a second connecting frame, a connecting bracket, a monitoring port, and an alarm. The second connecting frame is connected to the lower outer side of the second connecting pipe, the connecting bracket is connected to the second connecting frame, multiple monitoring ports are connected to the lower part of the connecting bracket, and an alarm is connected to the upper front side of the connecting bracket.

[0011] Furthermore, the monitoring port connecting brackets are evenly distributed in a ring shape.

[0012] The beneficial effects are as follows: 1. This utility model can effectively exchange heat with the outside world through the coil, and the fan on the first fixed frame can cool the boiler flue gas inside the coil. When the ambient temperature drops in winter, the heating plate can be activated to heat the flue gas, thus achieving the effect of inert gas protection for the coal mill and regulating the inert gas entry temperature, avoiding the output reduction caused by the fluctuation of the working environment temperature of the coal mill.

[0013] 2. This utility model attaches the monitoring port to the flange connection between the second connecting pipe and the coal mill's air inlet. The operation of the coal mill will generate vibration, which can easily cause the bolts at the connection to loosen and lead to inert gas leakage. When leakage occurs, the monitoring port can detect it and promptly sound an alarm to avoid accidents caused by reduced protection due to inert gas leakage. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the first partial structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the second part of the structure of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the third part of this utility model.

[0018] The component names and serial numbers in the diagram are as follows: 1_First connecting pipe, 2_Coil, 20_First connecting bracket, 3_Second connecting pipe, 30_Second connecting bracket, 4_First fixing bracket, 5_Fan, 6_Second fixing bracket, 7_Heating plate, 8_Connecting bracket, 9_Monitoring port, 10_Alarm. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0020] A safety protection device for a coal mill, such as Figures 1-3As shown, it includes a first connecting pipe 1, a coil 2, a first connecting bracket 20, a second connecting pipe 3, a first fixing bracket 4, a fan 5, a second fixing bracket 6, and a heating plate 7. The first connecting pipe 1 is connected to the coil 2 on the left side. The coil 2 is made of copper and can conduct heat efficiently. The coil 2 is connected to the second connecting pipe 3 on the left side. The right side of the second connecting pipe 3 has a flared structure. Both the first connecting pipe 1 and the second connecting pipe 3 are provided with flanges for easy connection. The coil 2 is connected to two first connecting brackets 20 on the left and right. The front sides of the first connecting brackets 20 are detachably connected to the first fixing brackets 4. The first fixing brackets 4 are provided with multiple fans 5. The rear sides of the first connecting brackets 20 are detachably connected to the second fixing brackets 6. The second fixing brackets 6 are detachably connected to the heating plate 7.

[0021] When using this utility model, firstly, connect the first connecting pipe 1 to the boiler's exhaust pipe, and connect the second connecting pipe 3 to the coal mill's intake pipe. Then, when the coal mill is working, the flue gas generated by boiler combustion can be guided into the coal mill through the first connecting pipe 1, coil 2, and second connecting pipe 3 for protection, preventing explosions. When the waste heat of the boiler flue gas is too high, the coil 2 can effectively exchange heat with the outside environment, and the fan 5 on the first fixed frame 4 can cool the boiler flue gas inside the coil 2, preventing excessively high flue gas temperatures. When the ambient temperature drops in winter, the heating plate 7 on the second fixed frame 6 can be activated to heat the flue gas, thereby ensuring that the temperature of the gas entering the coal mill is always within a controllable range. During the process of the flue gas recombining coil 2 entering the second connecting pipe 3, the flue gas flow rate will slow down due to the change in pipe diameter, so that the flue gas evenly covers the coal mill to form an air curtain to effectively isolate the air, thereby playing a role in protecting the coal mill with inert gas and regulating the inert gas entry temperature, avoiding the output reduction caused by fluctuations in the working environment temperature of the coal mill.

[0022] like Figure 2 and Figure 4 As shown, it also includes a second connecting frame 30, a connecting bracket 8, a monitoring port 9, and an alarm 10. The second connecting frame 30 is connected to the lower outer side of the second connecting pipe 3. The connecting bracket 8 is connected to the second connecting frame 30. Twelve monitoring ports 9 are connected to the lower part of the connecting bracket 8. The alarm 10 is connected to the upper front side of the connecting bracket 8. The monitoring ports 9 are evenly distributed in a ring along the connecting bracket 8.

[0023] During the ventilation process, the monitoring port 9 is attached to the flange connection between the second connecting pipe 3 and the coal mill inlet. The operation of the coal mill will generate vibration, which may cause the bolts at the connection to loosen and lead to leakage of inert gas. When leakage occurs, the monitoring port 9 can monitor it and promptly alarm through the alarm 10 to avoid accidents caused by reduced protection effect due to inert gas leakage.

[0024] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A safety protection device for a coal mill, characterized in that, It includes a first connecting pipe (1), a coil (2), a first connecting frame (20), a second connecting pipe (3), a first fixing frame (4), a fan (5), a second fixing frame (6), and a heating plate (7). The first connecting pipe (1) is connected to the coil (2) on the left side, and the coil (2) is connected to the second connecting pipe (3) on the left side. The coil (2) is connected to two first connecting frames (20) on the left and right sides. The first fixing frame (4) is detachably connected between the front sides of the first connecting frame (20). Multiple fans (5) are provided on the first fixing frame (4). The second fixing frame (6) is detachably connected to the rear side of the first connecting frame (20). The heating plate (7) is detachably connected between the second fixing frames (6).

2. The safety protection device for a coal mill according to claim 1, characterized in that, The right side of the second connecting pipe (3) has a trumpet-shaped structure.

3. A safety protection device for a coal mill according to claim 1, characterized in that, Both the first connecting pipe (1) and the second connecting pipe (3) are equipped with flanges.

4. A safety protection device for a coal mill according to claim 1, characterized in that, The coil (2) is made of copper, which can conduct heat efficiently.

5. A safety protection device for a coal mill according to claim 1, characterized in that, It also includes a second connecting frame (30), a connecting bracket (8), a monitoring port (9) and an alarm (10). The second connecting frame (30) is connected to the lower outer side of the second connecting pipe (3). The connecting bracket (8) is connected to the second connecting frame (30). Multiple monitoring ports (9) are connected to the lower part of the connecting bracket (8). An alarm (10) is connected to the upper front side of the connecting bracket (8).

6. A safety protection device for a coal mill according to claim 5, characterized in that, The monitoring ports (9) are evenly distributed in a ring along the connecting bracket (8).

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