Tail gas sealing device of yellow phosphorus electric furnace tail gas fan

Abstract

The utility model discloses a yellow phosphorus electric furnace tail gas fan tail gas sealing device which comprises a sealing pipe connected with a fan shell and a bearing box and a water sealing pipe connected with the sealing pipe, a gas-water separation cover is installed at the output end of the water sealing pipe, the gas-water separation cover is arranged on the water sealing box in a covering mode, and the output end of the water sealing pipe is located below the liquid level in the water sealing box. And the gas-water separation cover is also connected with an exhaust pipe. The effect of improving the sealing performance between the fan shell and the bearing box is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fan sealing devices, in particular to a tail gas sealing device for a yellow phosphorus electric furnace tail gas fan. Background Art

[0002] The existing seals between the yellow phosphorus electric furnace tail gas fan housing and the fan shaft adopt mechanical seals or nitrogen seals, which mainly have the following disadvantages: 1. Due to the relatively high pressure of yellow phosphorus tail gas in the fan housing, the mechanical seal cannot completely seal the yellow phosphorus tail gas in the fan, and yellow phosphorus tail gas will overflow between the fan housing and the shaft, resulting in risks of CO poisoning and explosion in the on-site environment. 2. The mechanical seal needs to be cooled with water, and after the fan runs for a long time, the organic seal cooling water will splash out. 3. The nitrogen seal for the fan has a certain effect, but the cost of nitrogen production is relatively high. Summary of the Invention

[0003] The technical problem to be solved by the utility model is that the mechanical seal is prone to leakage while the nitrogen seal has too high a cost.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a tail gas sealing device for a yellow phosphorus electric furnace tail gas fan, including a sealing pipe connecting the fan housing and the bearing box and a water seal pipe connecting the sealing pipe. An air-water separation cover is installed at the output end of the water seal pipe. The air-water separation cover covers the water seal box, and the output end of the water seal pipe is located below the liquid level in the water seal box. An exhaust pipe is also connected to the air-water separation cover.

[0005] Preferably, the sealing pipe is made of a corrugated pipe. The two ends of the sealing pipe are respectively connected to the fan housing and the bearing box through flanges, and a sealing ring is arranged at the connection end of the water seal pipe and the sealing pipe.

[0006] Preferably, the air-water separation cover is fixedly installed on one side of the top of the water seal box. The movable end of the air-water separation cover is vertically and downwardly fixedly connected with a side baffle, and the bottom end of the side baffle is located below the bottom end of the water seal pipe.

[0007] Preferably, a bottom baffle is vertically and fixedly installed at the bottom of the water seal box, and the bottom baffle is located between the water seal pipe and the side baffle.

[0008] The utility model provides a tail gas sealing device for a yellow phosphorus electric furnace tail gas fan. A corrugated pipe sealing device made of stainless steel is manufactured and installed between the fan housing and the bearing box to seal this section of the fan shaft. A water seal pipe is installed at the lower part of the sealing device to divert the leaked water and yellow phosphorus tail gas. The water seal pipe is connected to the water seal box, and the water seal box is used to water-seal the corrugated pipe sealing device to prevent yellow phosphorus tail gas from leaking into the on-site environment. The yellow phosphorus tail gas in the water seal box is transported to a safe location through the exhaust pipe, and the water enters the sewage system through the overflow pipe; not only improves the sealing performance of the sealing device, but also eliminates the risks of carbon monoxide poisoning and explosion. Brief Description of the Drawings

[0009] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0010] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0011] In the figure: 1, sealing pipe; 2, water seal pipe; 3, gas-water separation cover; 4, exhaust pipe; 5, bottom baffle; 6, side baffle; 7, water seal box. Detailed Embodiment

[0012] As Figure 1 shown, the present utility model provides a tail gas sealing device for a yellow phosphorus electric furnace tail gas fan, which includes a sealing pipe 1 connecting the fan housing and the bearing box and a water seal pipe 2 connecting the sealing pipe 1. A gas-water separation cover 3 is installed at the output end of the water seal pipe 2. The gas-water separation cover 3 covers the water seal box 7, and the output end of the water seal pipe 2 is located below the liquid level in the water seal box 7. An exhaust pipe 4 is also connected to the gas-water separation cover 3.

[0013] A corrugated pipe made of stainless steel is used as the sealing pipe 1. The sealing pipe 1 is installed between the fan housing and the bearing box. The sealing pipe 1 has a certain amount of axial and radial displacement, which can avoid the influence of the vibration of the fan housing on the sealing device and the bearing box. The sealing pipe 1 seals this section of the fan shaft. A water seal pipe 2 is connected to the bottom of the sealing pipe 1 to divert the leaked water and yellow phosphorus tail gas. The water contained in the water seal box 7 serves as a sealing structure. The exhaust pipe 4 connected to the top of the gas-water separation cover 3 is used to discharge the yellow phosphorus tail gas. The water seal box 7 cooperates with the gas-water separation cover 3 to seal the water seal pipe 2, and at the same time collects the gas leaked from the mechanical seal of the yellow phosphorus tail gas fan and the leaked mechanical seal cooling water, avoiding the emission of the leaked yellow phosphorus tail gas into the on-site environment and at the same time avoiding the splashing of the leaked mechanical cooling water. The yellow phosphorus tail gas and water are separated in the water seal box 7. The yellow phosphorus tail gas is transported to a safe location through the exhaust pipe on the gas-water separation cover 3 at the top of the water seal box 7, and the water enters the yellow phosphorus production sewage system.

[0014] As a preferred embodiment of the present utility model. The sealing pipe 1 adopts a corrugated pipe. The two ends of the sealing pipe 1 are respectively connected to the fan housing and the bearing box through flanges. A sealing ring is provided at the connection end of the water seal pipe 2 and the sealing pipe 1. Using a corrugated pipe to prepare the sealing pipe can ensure the sealing performance while meeting the axial movement and radial swing when the fan housing vibrates.

[0015] As Figure 1As shown in the figure. The gas-liquid separation cover 3 is fixedly installed on one side of the top of the water seal box 7. The movable end of the gas-liquid separation cover 3 is fixedly connected with a side baffle 6 vertically downward. The bottom end of the side baffle 6 is located below the bottom end of the water seal pipe 2. Both sides of the side baffle 6 are fixedly connected to the opposite inner side walls of the water seal box 7 to ensure stability. At the same time, the side baffle 6 can limit the gas flowing out of the water seal pipe 2 to ensure that the yellow phosphorus gas is accurately collected.

[0016] As Figure 1 shown in the figure. A bottom baffle 5 is vertically and fixedly installed at the bottom of the water seal box 7. The bottom baffle 5 is located between the water seal pipe 2 and the side baffle 6. The bottom baffle is used to block the bottom notch of the side baffle 6 to avoid the overflow of yellow phosphorus tail gas when the air pressure is high.

Claims

1. A tail gas sealing device for a tail gas blower of a yellow phosphorus electric furnace, characterized in that: It comprises a sealing tube (1) connecting a fan housing and a bearing box, and a water seal tube (2) connected to the sealing tube (1); an air-water separation cover (3) is installed on the output end of the water seal tube (2); the air-water separation cover (3) is arranged on a water seal box (7), and the output end of the water seal tube (2) is located below the liquid level in the water seal box (7); and an exhaust pipe (4) is also connected to the air-water separation cover (3).

2. A yellow phosphorus electric furnace tail gas blower tail gas sealing device as claimed in claim 1, characterized in that: The sealing tube (1) is a corrugated tube, and the two ends of the sealing tube (1) are respectively connected to the fan housing and the bearing box via flanges, and a sealing ring is provided at the connection end between the water seal tube (2) and the sealing tube (1).

3. A yellow phosphorus electric furnace tail gas blower tail gas sealing device as claimed in claim 1, characterized in that: The air-water separation cover (3) is fixedly mounted on one side of the top of the water seal box (7), and the movable end of the air-water separation cover (3) is vertically fixedly connected to a side baffle (6) downward, and the bottom end of the side baffle (6) is located below the bottom end of the water seal pipe (2).

4. A yellow phosphorus electric furnace tail gas blower tail gas sealing device as claimed in claim 3, characterized in that: A bottom baffle (5) is vertically fixedly mounted on the bottom of the water seal box (7), and the bottom baffle (5) is located between the water seal pipe (2) and the side baffle (6).

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