Spiral air ceramic nozzle of coal-fired boiler and preparation method thereof

Abstract

The invention relates to a spiral air ceramic nozzle of coal-fired boiler and preparation method thereof. The nozzle comprises a main body, a spiral groove is arranged in the main body, and the spiral groove spirally extends on the inner wall of the main body; and the main body is prepared from the following raw materials, by weight, 20-30 parts of gibbsite, 16-25 parts of magnesium aluminate spinel, 20-30 parts of kaolin, 5-10 parts of coal cinder, 4-8 parts of illite, 4-8 parts of calcite, 1-3 parts of methyl cellulose and 5-7 parts of carbon fiber. Air flow gradually rotates in the process of moving from an air inlet end to an air outlet end in the main body, and is finally sprayed out from the air outlet end in a spiral air flow state, so that the air supply and air distribution forms of a hearth in the prior art are changed, a better impact stirring effect is achieved on an air field in the hearth, the air field is more uniform, moreover, the contact and reaction time of oxygen and coal, carbon dioxide and coal, carbon monoxide and oxygen and other gases is prolonged, the utilization rate of carbon dioxide and coal is improved, and the discharge amount of smoke dust, carbon dioxide and other emissions is effectively reduced.

Description

technical field

[0001] The invention relates to the technical field of boiler combustion, in particular to a spiral air ceramic nozzle for a coal-fired boiler and a preparation method thereof. Background technique

[0002] With the rapid development of the national economy, my country's energy consumption is increasing day by day, and China has become the world's largest energy consumer. In my country's total primary energy consumption, coal consumption has an absolute advantage, accounting for about 70% of total energy consumption.

[0003] As an important energy source, coal plays an important role in our country, but at the same time, coal burning also causes serious pollution to the environment. Carbon dioxide and nitrogen oxides are a class of gases that can cause serious air pollution, and are basically considered to be one of the main sources of air pollution. At present, the most important feature of my country's energy composition is coal, which will produce a lar...

Examples

Embodiment 1

[0068] Such as figure 1 and figure 2 The shown spiral air ceramic nozzle for a coal-fired boiler includes a main body 1 , and a spiral groove 2 is arranged inside the main body 1 , and the spiral groove 2 extends in a spiral shape on the inner wall of the main body 1 .

[0069] In this embodiment, through the structural design of the spiral groove, the air flow forms a cyclone in the main body, and then a spiral wind is ejected from the air outlet. The spiral groove is a groove arranged on the inner wall of the main body. The extension direction of the groove is the extension direction of the helix on the inner wall. Rotation is generated during the process, and finally the purpose of spraying spiral wind is achieved.

[0070] In one or more embodiments, the spiral groove can extend along the entire inner wall of the main body, or along a part of the inner wall of the main body. In one or more embodiments, the helical groove can be a continuous helical groove, or can be co...

Embodiment 2

[0073] On the basis of Example 1, such as Figure 1 to Figure 5 As shown, the main body 1 is provided with a partition 7, and the partition 7 divides the internal space of the main body 1 into an air inlet area connected to the air inlet end and a cyclone area connected to the air outlet end. The chamfered hole 8 in the air intake area and the cyclone area has an included angle between the central axis of the chamfered hole 8 and the central axis of the partition plate 7 .

[0074] In some embodiments, such as image 3 As shown, the angle between the central axis of the chamfered hole and the central axis of the separator is 30-70°. Preferably, the included angle is 45-60°.

[0075] Preferably, in one or more embodiments, as figure 2 As shown, the separator 7 is provided with an inner ring area 71 and an outer ring area 72 located outside the inner ring area 71, and the chamfered holes 8 are arranged in the inner ring area 71 and the outer ring area 72, The number of cham...

Embodiment 3

[0079] On the basis of the above examples, if Figure 1 to Figure 5 As shown, the main body 1 is also provided with at least one swirl-assist tube 5, the inside of the swirl-assist tube 5 forms a swirl-assist air passage 6, and one end of the swirl-assist air passage 6 communicates with the air intake area, The other end of the air duct 6 communicates with the cyclone area.

[0080] The two ends of the swirl-assisted air passage are connected to the air intake area and the cyclone area respectively, so that a small part of the gas in the intake area enters the swirl-assisted tube before it contacts the partition, and then passes through the connection between the swirl-assisted air passage and the cyclone area The mouth returns to the main body. Since the incident direction of the returning swirl-promoting airflow is inconsistent with the flow direction of the airflow in the cyclone area, it acts as a bias, impacts the main airflow and causes the main airflow to rotate to a c...

technical field

[0001] The invention relates to the technical field of boiler combustion, in particular to a spiral air ceramic nozzle for a coal-fired boiler and a preparation method thereof. Background technique

[0002] With the rapid development of the national economy, my country's energy consumption is increasing day by day, and China has become the world's largest energy consumer. In my country's total primary energy consumption, coal consumption has an absolute advantage, accounting for about 70% of total energy consumption.

[0003] As an important energy source, coal plays an important role in our country, but at the same time, coal burning also causes serious pollution to the environment. Carbon dioxide and nitrogen oxides are a class of gases that can cause serious air pollution, and are basically considered to be one of the main sources of air pollution. At present, the most important feature of my country's energy composition is coal, which will produce a lar...

Examples

Embodiment 1

[0068] Such as figure 1 and figure 2 The shown spiral air ceramic nozzle for a coal-fired boiler includes a main body 1 , and a spiral groove 2 is arranged inside the main body 1 , and the spiral groove 2 extends in a spiral shape on the inner wall of the main body 1 .

[0069] In this embodiment, through the structural design of the spiral groove, the air flow forms a cyclone in the main body, and then a spiral wind is ejected from the air outlet. The spiral groove is a groove arranged on the inner wall of the main body. The extension direction of the groove is the extension direction of the helix on the inner wall. Rotation is generated during the process, and finally the purpose of spraying spiral wind is achieved.

[0070] In one or more embodiments, the spiral groove can extend along the entire inner wall of the main body, or along a part of the inner wall of the main body. In one or more embodiments, the helical groove can be a continuous helical groove, or can be co...

Embodiment 2

[0073] On the basis of Example 1, such as Figure 1 to Figure 5 As shown, the main body 1 is provided with a partition 7, and the partition 7 divides the internal space of the main body 1 into an air inlet area connected to the air inlet end and a cyclone area connected to the air outlet end. The chamfered hole 8 in the air intake area and the cyclone area has an included angle between the central axis of the chamfered hole 8 and the central axis of the partition plate 7 .

[0074] In some embodiments, such as image 3 As shown, the angle between the central axis of the chamfered hole and the central axis of the separator is 30-70°. Preferably, the included angle is 45-60°.

[0075] Preferably, in one or more embodiments, as figure 2 As shown, the separator 7 is provided with an inner ring area 71 and an outer ring area 72 located outside the inner ring area 71, and the chamfered holes 8 are arranged in the inner ring area 71 and the outer ring area 72, The number of cham...

Embodiment 3

[0079] On the basis of the above examples, if Figure 1 to Figure 5 As shown, the main body 1 is also provided with at least one swirl-assist tube 5, the inside of the swirl-assist tube 5 forms a swirl-assist air passage 6, and one end of the swirl-assist air passage 6 communicates with the air intake area, The other end of the air duct 6 communicates with the cyclone area.

[0080] The two ends of the swirl-assisted air passage are connected to the air intake area and the cyclone area respectively, so that a small part of the gas in the intake area enters the swirl-assisted tube before it contacts the partition, and then passes through the connection between the swirl-assisted air passage and the cyclone area The mouth returns to the main body. Since the incident direction of the returning swirl-promoting airflow is inconsistent with the flow direction of the airflow in the cyclone area, it acts as a bias, impacts the main airflow and causes the main airflow to rotate to a c...

Images