A vertical kiln pulverized coal ignition device

Abstract

The application discloses a vertical kiln pulverized coal ignition device, and relates to the technical field of vertical kiln, which comprises a primary pulverized coal channel, a central channel, an igniter, an air channel and a secondary pulverized coal channel, the primary pulverized coal channel and the central channel are integrally formed, the primary pulverized coal channel is connected with a coal powder end of external airflow, and the central channel is connected to the inside of the vertical kiln; the igniter is arranged between the primary pulverized coal channel and the central channel; the air channel is in communication with the primary pulverized coal channel, and a high-molecular separation membrane for isolating nitrogen is arranged in the air channel; the high-molecular separation membrane in the air channel separates oxygen and nitrogen, more oxygen enters the primary pulverized coal channel, the oxygen content is improved, the pulverized coal can be quickly ignited and fully combusted, the ignition efficiency is improved, and the pollution to the environment is reduced.

Description

Technical Field

[0001] This invention relates to the field of vertical kiln technology, specifically to a vertical kiln pulverized coal ignition device. Background Technology

[0002] A vertical kiln is a thermal equipment for continuously calcining clinker, with material fed from the top and discharged from the bottom. It consists of a kiln body, feeding and discharging devices, and ventilation equipment. It is widely used for calcining various refractory raw materials and lime. Its advantages include lower infrastructure investment, smaller footprint, high calcination efficiency, low fuel consumption, and ease of mechanization and automation.

[0003] To improve resource utilization, vertical kiln pulverized coal burners are evolving from burning high-quality bituminous coal to burning low-quality coal and waste fuels, making burner modification imperative. Furthermore, pulverized coal typically has an ignition point between 225°C and 285°C, making it difficult to ignite and prone to incomplete combustion, producing harmful gases and polluting the environment. Therefore, a vertical kiln pulverized coal ignition device urgently needs to be developed. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a vertical kiln pulverized coal ignition device. This device separates oxygen and nitrogen through a polymer separation membrane within the air channel, allowing more oxygen to enter the primary pulverized coal channel, increasing the oxygen content, and enabling the pulverized coal to ignite quickly and burn completely. This improves ignition efficiency while reducing environmental pollution.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a vertical kiln pulverized coal ignition device, comprising a primary pulverized coal channel, a central channel, an igniter, an air channel, and a secondary pulverized coal channel. The primary pulverized coal channel and the central channel are integrally formed. The primary pulverized coal channel is connected to the external airflow pulverized coal inlet. The central channel is connected to the interior of the vertical kiln. The igniter is positioned between the primary pulverized coal channel and the central channel. The air channel is connected to the primary pulverized coal channel and contains a high-molecular separation membrane for isolating nitrogen. An exhaust port is provided on the air channel corresponding to the exterior of the high-molecular separation membrane. An exhaust channel is fitted outside the air channel and is connected to the exhaust port. An exhaust outlet is provided on the exhaust channel. A secondary pulverized coal channel is provided outside the central channel. The secondary pulverized coal channel is connected to the interior of the vertical kiln and surrounds the central channel. A secondary pulverized coal inlet is provided on the secondary pulverized coal channel and is connected to the external airflow pulverized coal inlet.

[0006] Preferably, a pressure relief channel is connected to the primary pulverized coal channel, the pressure relief channel is connected to the secondary pulverized coal channel, and a valve is installed on the pressure relief channel.

[0007] Preferably, a pulverized coal filter plate is provided at the connection point of the primary pulverized coal channel within the pressure relief channel.

[0008] Preferably, a condenser is provided between the primary pulverized coal channel and the central channel, corresponding to the front end of the igniter.

[0009] Preferably, a pressure sensor is installed in the primary pulverized coal channel and at the rear end of the corresponding air channel.

[0010] Preferably, the end of the central channel is provided with a blunt body.

[0011] This invention provides a vertical kiln pulverized coal ignition device, which has the following beneficial effects:

[0012] This invention separates oxygen and nitrogen through a polymer separation membrane in the air channel, allowing more oxygen to enter the primary pulverized coal channel, increasing the oxygen content, enabling the pulverized coal to ignite quickly and burn completely, improving ignition efficiency while reducing environmental pollution. Attached Figure Description

[0013] Figure 1 This is a front cross-sectional view of a vertical kiln pulverized coal ignition device according to the present invention.

[0014] In the diagram: 1. Primary pulverized coal channel; 2. Exhaust port; 3. Exhaust channel; 4. Air channel; 5. Polymer separation membrane; 6. Exhaust hole; 7. Pressure sensor; 8. Secondary pulverized coal inlet; 9. Ignition device; 10. Central channel; 11. Blunt body; 12. Secondary pulverized coal channel; 13. Concentrator; 14. Pressure relief channel; 15. Valve; 16. Pulverized coal filter plate. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figure 1As shown, a vertical kiln pulverized coal ignition device includes a primary pulverized coal channel 1, a central channel 10, an igniter 9, an air channel 4, and a secondary pulverized coal channel 12. The primary pulverized coal channel 1 and the central channel 10 are integrally formed. The primary pulverized coal channel 1 is connected to the external airflow pulverized coal inlet end, and the central channel 10 is connected to the interior of the vertical kiln. The igniter 9 is disposed between the primary pulverized coal channel 1 and the central channel 10. The air channel 4 is connected to the primary pulverized coal channel 1, and a polymer separation membrane 5 for isolating nitrogen is disposed inside the air channel 4. An exhaust port 6 is provided on the air channel 4 corresponding to the outside of the polymer separation membrane 5. An exhaust channel 3 is sleeved on the outside of the air channel 4, and the exhaust channel 3 is connected to the exhaust port 6. An exhaust outlet 2 is provided on the exhaust channel 3. The central channel 10... An external secondary pulverized coal channel 12 is provided, which connects to the interior of the vertical kiln and surrounds the central channel 10. A secondary pulverized coal inlet 8 is provided on the secondary pulverized coal channel 12, which is connected to the external airflow pulverized coal inlet. A pressure relief channel 14 is provided on the primary pulverized coal channel 1, which is connected to the secondary pulverized coal channel 12. A valve 15 is provided on the pressure relief channel 14. A pulverized coal filter plate 16 is provided in the pressure relief channel 14 corresponding to the connection with the primary pulverized coal channel 1. A concentrator 13 is provided between the primary pulverized coal channel 1 and the central channel 10, corresponding to the front end of the igniter 9. A pressure sensor 7 is provided in the primary pulverized coal channel 1, corresponding to the rear end of the air channel 4. A blunt body 11 is provided at the end of the central channel 10.

[0017] Its detailed connection methods are well-known technologies in this field. The following mainly introduces the working principle and process, as follows:

[0018] According to the instruction manual Figure 1 It is known that all channels in this invention are made of high-temperature resistant materials. During operation, pulverized coal enters the primary pulverized coal channel 1 following the airflow. Air enters from the air channel 4, and a large amount of nitrogen is intercepted by the polymer separation membrane 5. The air with a higher oxygen concentration enters the primary pulverized coal channel 1 and, together with the pulverized coal airflow, passes through the igniter 9 and enters the central channel 10, finally reaching the vertical kiln. The igniter 9 ignites the pulverized coal, thereby igniting the pulverized coal in the central channel 10 and spraying it into the vertical kiln. Then, the secondary pulverized coal inlet 8 sprays pulverized coal into the secondary pulverized coal channel 12, finally entering the vertical kiln and being ignited by the flame sprayed from the central channel 10, expanding the combustion range. During this process, the nitrogen separated in the air channel 4 and a portion of the air enter the exhaust channel 3 through the exhaust port 6 and are discharged from the exhaust outlet 2. This invention separates oxygen and nitrogen through the polymer separation membrane 5 in the air channel 4, allowing more oxygen to enter the primary pulverized coal channel 1, increasing the oxygen content, enabling the pulverized coal to ignite quickly and completely, improving ignition efficiency while reducing environmental pollution.

[0019] The primary pulverized coal channel 1 is connected to a pressure relief channel 14, which is connected to the secondary pulverized coal channel 12. A valve 15 is installed on the pressure relief channel 14. If the pulverized coal flow rate is too fast, or if the air pressure in the primary pulverized coal channel 1 and the central channel 10 is too high or too low, it will affect the use of the igniter 9 and the ignition effect of the pulverized coal. The air pressure is adjusted by controlling the pressure relief pipe and the valve 15.

[0020] A pulverized coal filter plate 16 is installed in the pressure relief channel 14 at the connection point with the primary pulverized coal channel 1. The pressure relief channel 14 is designed to prevent pulverized coal from entering as much as possible, thus ensuring the concentration of pulverized coal in the primary pulverized coal channel 1 and the central channel 10.

[0021] Among them, a concentrator 13 is provided between the primary pulverized coal channel 1 and the central channel 10 and at the front end of the igniter 9 to increase the concentration of pulverized coal at the ignition position of the igniter 9, so as to facilitate ignition.

[0022] Among them, a pressure sensor 7 is installed in the primary pulverized coal channel 1 and at the rear end of the corresponding air channel 4. It is used to detect the air pressure in the primary pulverized coal channel 1 and is connected to an external control system to control the feeding of the primary pulverized coal channel 1. Here, the air pressure is positively correlated with the flow rate, and a flow rate sensor can also be used.

[0023] The central channel 10 is provided with a blunt body 11 at its end to improve the distribution of combustion airflow.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical kiln pulverized coal ignition device, characterized in that, The system includes a primary pulverized coal channel (1), a central channel (10), an igniter (9), an air channel (4), and a secondary pulverized coal channel (12). The primary pulverized coal channel (1) and the central channel (10) are integrally formed. The primary pulverized coal channel (1) is connected to the external airflow pulverized coal inlet end, and the central channel (10) is connected to the inside of the vertical kiln. The igniter (9) is located between the primary pulverized coal channel (1) and the central channel (10). The air channel (4) is designed to communicate with the primary pulverized coal channel (1), and a polymer separation membrane (5) for isolating nitrogen is installed inside the air channel (4). An exhaust port (6) is provided on the air channel (4) corresponding to the outside of the polymer separation membrane (5). An exhaust channel (3) is provided on the outside of the air channel (4), and the exhaust channel (3) is designed to be connected to the exhaust port (6). An exhaust outlet (2) is provided on the exhaust channel (3). A secondary coal powder channel (12) is provided on the outside of the central channel (10). The secondary coal powder channel (12) is connected to the inside of the vertical kiln and surrounds the central channel (10). A secondary coal powder inlet (8) is provided on the secondary coal powder channel (12). The secondary coal powder inlet (8) is connected to the external airflow coal powder inlet end.

2. The vertical kiln pulverized coal ignition device according to claim 1, characterized in that, A pressure relief channel (14) is connected to the primary pulverized coal channel (1), and the pressure relief channel (14) is connected to the secondary pulverized coal channel (12). A valve (15) is provided on the pressure relief channel (14).

3. The vertical kiln pulverized coal ignition device according to claim 2, characterized in that, A pulverized coal filter plate (16) is provided at the connection point of the pressure relief channel (14) corresponding to the primary pulverized coal channel (1).

4. The vertical kiln pulverized coal ignition device according to claim 1, characterized in that, A concentrate (13) is provided between the primary pulverized coal channel (1) and the central channel (10) and at the front end of the corresponding igniter (9).

5. A vertical kiln pulverized coal ignition device according to claim 1, characterized in that, A pressure sensor (7) is installed in the primary pulverized coal channel (1) and at the rear end of the corresponding air channel (4).

6. The vertical kiln pulverized coal ignition device according to claim 1, characterized in that, A blunt body (11) is provided at the end of the central channel (10).

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