Flue ash removal system of calcium carbide furnace purification system

Abstract

The utility model discloses a flue ash removal system of a calcium carbide furnace purification system, which is characterized in that a plurality of nitrogen cannons are arranged on a flue, an exhaust port of each nitrogen cannon is arranged in the flue, and the exhaust port of each nitrogen cannon is parallel to the trend of flue gas in the flue; a gas inlet of each nitrogen gun is connected with an exhaust port of the nitrogen storage tank, a gas inlet of the nitrogen storage tank is connected with an exhaust port of the nitrogen compressor, and a gas inlet of the nitrogen compressor is connected with a nitrogen source; and a pressure sensor is mounted at an air inlet of the settler. The pressure sensor is used for detecting the pressure of flue gas sent to the settler in the flue, dust adheres to the inner wall of the flue under long-term operation, the pipe diameter of the flue is reduced, the flue gas pressure is reduced accordingly, and when the pressure sensor detects that the flue gas pressure is-80 MPa, the nitrogen gun is controlled to eject high-pressure nitrogen to automatically clean the dust accumulated in the flue. And the blockage removal time and frequency of the purification flue are reduced, and meanwhile, the labor intensity of workers and the safety danger coefficient are reduced.

Description

Technical field:

[0001] The utility model relates to the field of calcium carbide furnace production, in particular to a flue dust cleaning system of a calcium carbide furnace purification system. Background technology:

[0002] The flue gas from the calcium carbide furnace is generated in the calcium carbide furnace during the calcium carbide production process. When treating the flue gas from the calcium carbide furnace, it is sent to the settler through the purification flue to separate the large particles of dust by gravity sedimentation. The treated flue gas enters the bag dust collector through the raw air fan, and the purified flue gas is transported to the next production link through the clean air fan.

[0003] The dust concentration of the flue gas from the closed calcium carbide furnace is high and contains a large amount of tar. Its temperature is 500℃-800℃, the carbon monoxide content is 80-90%, and the dust concentration is 50-150g / Nm 3 During the transportation process, dust and tar combine to form molten ash at high temperature, which adheres to the cooling flue and affects the flue gas circulation, thus affecting the normal operation of the entire calcium carbide production process. At present, the flue is blocked by observing the pipeline pressure of equipment such as sedimentation filters. The blocked flue is cleared during maintenance or material surface treatment, which is labor-intensive and pollutes the environment, posing a major safety hazard. Utility model content:

[0004] The utility model aims to provide a flue dust cleaning system for a calcium carbide furnace purification system.

[0005] The utility model is implemented by the following technical solutions:

[0006] A flue ash cleaning system of a calcium carbide furnace purification system comprises a settler, an air inlet of the settler is connected to a flue, a plurality of nitrogen cannons are installed on the flue, an exhaust port of each nitrogen cannon is placed inside the flue, and the exhaust port of the nitrogen cannon is parallel to the direction of the flue; the air inlet of each nitrogen cannon is connected to the exhaust port of a nitrogen storage tank, the air inlet of the nitrogen storage tank is connected to the exhaust port of a nitrogen compressor, and the air inlet of the nitrogen compressor is connected to a nitrogen source;

[0007] A pressure sensor is installed at the air inlet of the settler, and the signal output end of the pressure sensor is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the signal input end of each of the nitrogen cannons.

[0008] Preferably, the nitrogen gun is installed at a bend in the flue, and an exhaust port of the nitrogen gun faces the bend in the flue.

[0009] Preferably, the pressure sensor is connected to a pressure collection tube, the pressure collection tube is connected to a flue, and the pressure collection tube forms an acute angle with the direction of flue gas in the flue.

[0010] Advantages of the utility model: The pressure sensor is used to detect the flue gas pressure sent to the settler in the flue. Under long-term operation, dust accumulates on the inner wall of the flue, causing the flue diameter to become smaller and the flue pressure to decrease accordingly. When the pressure sensor detects that the flue gas pressure is -80Pa, the nitrogen gun is controlled to spray high-pressure nitrogen to automatically clean the dust in the flue, reducing the time and number of times for purifying the flue and clearing blockages, while reducing the labor intensity and safety risk factor of workers. Description of the drawings:

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] In the figure: settler 1, flue 2, nitrogen cannon 3, nitrogen storage tank 4, nitrogen compressor 5, pressure sensor 6, controller 7, pressure collection tube 8. Specific implementation method:

[0013] like Figure 1 As shown, a flue ash cleaning system of a calcium carbide furnace purification system includes a settler 1, an air inlet of the settler 1 is connected to a flue 2, a plurality of nitrogen cannons 3 are installed on the flue 2, an exhaust port of each nitrogen cannon 3 is placed inside the flue 2, and the exhaust port of the nitrogen cannon 3 is parallel to the direction of the flue 2; the air inlet of each nitrogen cannon 3 is connected to the exhaust port of a nitrogen storage tank 4, the air inlet of the nitrogen storage tank 4 is connected to the exhaust port of a nitrogen compressor 5, and the air inlet of the nitrogen compressor 5 is connected to a nitrogen source;

[0014] A pressure sensor 6 is installed at the air inlet of the settler 1, and the signal output end of the pressure sensor 6 is electrically connected to the signal input end of the controller 7, and the signal output end of the controller 7 is electrically connected to the signal input end of each nitrogen cannon 3;

[0015] The nitrogen compressor 5 pressurizes the nitrogen sent from the nitrogen source and sends it into the nitrogen storage tank 4 for storage. The pressure sensor 6 is used to detect the flue gas pressure sent to the settler 1 in the flue 2. Under long-term operation, dust accumulates on the inner wall of the flue 2, causing the diameter of the flue 2 to become smaller, and the flue gas pressure decreases accordingly. When the pressure sensor 6 detects that the flue gas pressure is -80MPa, the controller 7 receives the measurement data of the pressure sensor 6 and controls the nitrogen cannon 3 to spray high-pressure nitrogen to automatically clean the dust in the flue 2, thereby reducing the time and number of times to clean the flue 2, and at the same time reducing the labor intensity and safety risk factor of the workers.

[0016] The nitrogen cannon 3 is installed at the bend of the flue 2. The exhaust port of the nitrogen cannon 3 faces the bend of the flue 2. Since the flue gas conveying direction changes at the bend of the flue 2, the tar and dust particles in the flue gas will directly hit the inner wall of the flue 2, causing a large amount of dust accumulation. The compressed gas in the nitrogen cannon 3 will be directly sprayed onto the dust accumulation, which can fully clean the bend of the flue 2.

[0017] The pressure sensor 6 is connected to the pressure collection tube 8, and the pressure collection tube 8 is connected to the flue 2. The pressure collection tube 8 forms an acute angle with the direction of the flue gas in the flue 2, and the direction of the flue gas in the flue 2 and the angle of the pressure collection tube 8 are obtuse, which can reduce the dust and tar from entering the pressure measuring port of the pressure sensor 6 and avoid the pressure measuring port of the pressure sensor 6 being blocked by dust accumulation.

[0018] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flue ash cleaning system for a calcium carbide furnace purification system, comprising a settler, wherein the air inlet of the settler is connected to the flue, and characterized in that: A plurality of nitrogen cannons are installed on the flue, and the exhaust port of each nitrogen cannon is placed inside the flue, and the exhaust port of the nitrogen cannon is parallel to the direction of the flue gas; the air inlet of each nitrogen cannon is connected to the exhaust port of the nitrogen storage tank, the air inlet of the nitrogen storage tank is connected to the exhaust port of the nitrogen compressor, and the air inlet of the nitrogen compressor is connected to the nitrogen source; A pressure sensor is installed at the air inlet of the settler, and the signal output end of the pressure sensor is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the signal input end of each of the nitrogen cannons.

2. The flue dust cleaning system of the calcium carbide furnace purification system according to claim 1 is characterized in that: The nitrogen gun is installed at the bend of the flue, and the exhaust port of the nitrogen gun faces the bend of the flue.

3. A flue dust cleaning system for a calcium carbide furnace purification system according to claim 1 or 2, characterized in that: The pressure sensor is connected to a pressure collection tube, the pressure collection tube is connected to a flue, and the pressure collection tube forms an acute angle with the direction of flue gas in the flue.

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