Safety device of gas fan

Abstract

The utility model discloses a gas fan safety device which comprises a gas entraining pipeline and a nitrogen pipeline connected to the gas entraining pipeline, the gas entraining pipeline is located in a combustion tower, the other end of the gas entraining pipeline is located above a transmission shaft of a gas fan, a pipe opening faces the transmission shaft, and an axial flow fan is installed on the gas entraining pipeline. The original mode that gas leakage is passively blown away by an axial flow fan to reduce the on-site gas concentration during operation of a gas fan is changed into the mode that leaked gas is collected into the combustion tower to be treated, and the safety of the production environment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fan safety devices, in particular to a gas fan safety device. Background Art

[0002] Yellow phosphorus is mostly prepared by electric furnace method. Phosphate ore, white coal and silica are intermittently fed into the molten pool area inside the yellow phosphorus electric furnace through a feed pipe in a certain ratio to react and prepare yellow phosphorus. A large amount of coal gas is generated during the phosphorus production process. Generally, about 3000m³ of coal gas is generated for every ton of yellow phosphorus produced.

[0003] During the operation of the yellow phosphorus electric furnace gas blower, a small amount of gas leakage often occurs due to sealing problems, and the on-site gas alarm frequently sounds, posing a safety risk of gas pollution of the environment and personnel poisoning.

[0004] The current treatment method is: when a small amount of gas leaks during the operation of the electric furnace gas blower, a blower is installed on site to purge the gas leak to reduce the gas concentration. When the gas blower is stopped during peak hours, fillers are added manually to ensure that the gas blower is well sealed. Summary of the invention

[0005] The technical problem to be solved by the utility model is that a gas blower leaks gas during use.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a gas blower safety device, including an air bleed pipeline and a nitrogen pipeline connected to the air bleed pipeline, the air bleed pipeline is located in the combustion tower, and the other end is located above the gas blower drive shaft, and the pipe mouth faces the drive shaft, and an axial flow fan is installed on the air bleed pipeline.

[0007] Preferably, a collecting hood is installed on the top of the side wall of the gas blower, the collecting hood is trapezoidal, the interface on the top of the collecting hood is connected to the air bleed pipeline, and the bottom opening of the collecting hood covers the transmission shaft.

[0008] Preferably, a bellows is connected between the collecting hood and the air bleed line.

[0009] Preferably, a check valve and a ball valve are arranged on the nitrogen pipeline.

[0010] 1. The utility model provides a gas blower safety device, which connects an air bleed line to the gas blower. The air bleed line is aimed at the transmission shaft of the gas blower, and the gas overflowing from the gap of the transmission shaft is collected into the air bleed line. The air bleed line then transports the gas to the combustion tower for combustion, thereby avoiding the risk of gas leakage from the gas blower during the yellow phosphorus production process, eliminating the harsh environment of gas during on-site operations, and improving the safety of production.

[0011] 2. Before the air bleed pipeline is put into operation, the air bleed pipeline is filled with nitrogen. The air bleed pipeline is then put into operation after it is filled with nitrogen, which improves the safety of the air bleed pipeline operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0014] In the figure: 1. gas blower; 2. air bleed pipeline; 3. collecting hood; 4. axial flow fan; 5. combustion tower; 6. nitrogen pipeline; 7. bellows. DETAILED DESCRIPTION

[0015] like Figure 1 The utility model provides a gas blower safety device, comprising an air bleed line 2 and a nitrogen line 6 connected to the air bleed line 2, the air bleed line 2 is located in a combustion tower 5, the other end of the air bleed line 2 is located above the transmission shaft of the gas blower 1, and the pipe opening faces the transmission shaft, and an axial flow fan 4 is installed on the air bleed line 2.

[0016] When the gas blower 1 is running, the axial flow fan 4 is turned on. The axial flow fan 4 sucks the air at the transmission shaft of the gas blower 1 together with the leaked gas through the end of the bleed air pipeline 2, and transports them to the combustion tower 5 through the bleed air pipeline 2, and ignites the gas in the combustion tower 5 to achieve safe treatment of the leaked gas; when the axial flow fan 4 is turned on, the nitrogen pipeline 6 is opened first, and the nitrogen pipeline 6 transports nitrogen to the bleed air pipeline 2. The nitrogen discharges the air in the bleed air pipeline 2. After the nitrogen flows out from both ends of the bleed air pipeline 2, the nitrogen completely fills the bleed air pipeline 2, and then the axial flow fan 4 is turned on.

[0017] like Figure 1 As shown, in order to ensure that the air bleed pipeline 2 can fully absorb the gas overflowing from the transmission shaft of the gas blower 1, a collecting hood 3 is installed on the top of the side wall of the gas blower 1. The collecting hood 3 is trapezoidal, and the interface on the top of the collecting hood 3 is connected to the air bleed pipeline 2, and the bottom opening of the collecting hood 3 covers the transmission shaft.

[0018] The trapezoidal collecting hood 3 completely covers the gas overflow area of ​​the side wall of the gas blower 1. After the axial flow fan 4 is started, the gas overflowing from the gas blower 1 can be sucked into the air duct 2 to collect and process the leaked gas.

[0019] like Figure 1As shown. A bellows 7 is also connected between the collecting hood 3 and the air bleed line 2. During the operation of the gas blower 1, the outer wall of the gas blower 1 will vibrate. Since the collecting hood 3 is directly fixed on the gas blower 1, during the vibration of the collecting hood 3, the connection interface between the collecting hood 3 and the air bleed line 2 will loosen, thereby causing a gap, affecting the suction force and posing a risk of gas leakage. However, the bellows 7 is used for connection, so that the bellows 7 can adapt to the vibration of the collecting hood 3 and ensure the sealing of the air bleed line 2.

[0020] As a preferred embodiment of the utility model, a check valve and a ball valve are arranged on the nitrogen pipeline 6. Before the axial flow fan 4 is operated, the ball valve is opened, and the nitrogen enters the bleed air pipeline 2 through the nitrogen pipeline 6. After the axial flow fan 4 is operated, the ball valve is closed, and the coal gas in the bleed air pipeline 2 cannot pass through the check valve, thereby preventing the coal gas from entering the nitrogen pipeline 6.

Claims

1. A gas blower safety device, characterized in that: The invention comprises an air bleed pipeline (2) and a nitrogen pipeline (6) connected to the air bleed pipeline (2). The air bleed pipeline (2) is located in a combustion tower (5), and the other end of the air bleed pipeline (2) is located above the transmission shaft of a gas blower (1), and the pipe opening faces the transmission shaft. An axial flow blower (4) is installed on the air bleed pipeline (2).

2. A gas blower safety device as claimed in claim 1, characterized in that: A collecting hood (3) is installed on the top of the side wall of the gas blower (1); the collecting hood (3) is trapezoidal in shape; an interface on the top of the collecting hood (3) is connected to the air bleed pipeline (2); and an opening at the bottom of the collecting hood (3) covers the transmission shaft.

3. A gas blower safety device as claimed in claim 2, characterized in that: A bellows (7) is also connected between the collecting hood (3) and the air bleed pipeline (2).

4. A gas blower safety device as claimed in claim 1, characterized in that: A check valve and a ball valve are arranged on the nitrogen pipeline (6).

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