Gun head for methanol ignition device of pulverized coal fired boiler

Abstract

The utility model discloses a gun head for a methanol ignition device of a pulverized coal fired boiler, which comprises a methanol ignition system and an efficient gun head, the methanol ignition system is mounted in a heat insulation mounting box, and the methanol ignition system comprises a methanol delivery pipe, a mixer, an air delivery pipe and an igniter, the efficient gun head is installed at the other end, opposite to the atomizer, of the mixer, and the multiple nozzles formed in the outer end of the efficient gun head are annularly arranged in two layers. According to the gun head for the methanol ignition device of the pulverized coal fired boiler, methanol ignition is used for replacing diesel oil and plasma ignition, so that the ignition and stable combustion cost is reduced, fuel is saved in advance when powder is fed into the boiler, the original one circle of nozzles of the efficient gun head is increased to two circles, and the two circles of nozzles are arranged in two layers; according to the methanol ignition gun, by optimizing the positions and the arrangement mode of the spray holes in the gun head of the methanol ignition gun, the mode of igniting and igniting the pulverized coal is changed, and the use practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to boiler ignition equipment, in particular to a gun head used for a methanol ignition device of a pulverized coal boiler. Background Art

[0002] Pulverized coal boilers increase the combustion rate of coal, are highly efficient and energy-efficient, and are easy to start and stop. They consist of a furnace, burner, and ignition device. Currently, pulverized coal boiler ignition devices use diesel, natural gas, or plasma ignition.

[0003] To sum up, the existing ignition device uses diesel ignition, which results in high diesel consumption, black smoke during ignition, and high cost. The use of plasma ignition results in high power consumption. At the same time, coal powder is not easy to ignite, which easily causes secondary combustion in the tail flue. In view of the above problems, the existing equipment needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a gun head for a methanol ignition device for a pulverized coal boiler, so as to solve the problems proposed in the above background technology that the existing ignition device adopts diesel ignition, resulting in high diesel consumption, black smoke during ignition, and high cost, and adopts plasma ignition, resulting in high power consumption, and the pulverized coal is not easy to ignite, which easily causes secondary combustion in the tail flue.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a lance head for a methanol ignition device for a pulverized coal boiler, comprising a methanol ignition system and a high-efficiency lance head,

[0006] The methanol ignition system is installed inside the heat-insulating installation box, and the methanol ignition system includes a methanol delivery pipe, a mixer, an air delivery pipe and an igniter. The methanol delivery pipe is installed with a methanol quantitative delivery pump, and one end of the methanol delivery pipe is connected to one end of the atomizer, and the other end of the atomizer is connected to one end of the mixer. The air delivery pipe is installed with an air quantitative delivery pump, and one end of the air delivery pipe is connected to the lower end of one side of the mixer, and the igniter is installed at the upper end of the other side of the mixer.

[0007] The high-efficiency gun head is installed at the other end opposite to the mixer and the atomizer, and the high-efficiency gun head passes through the insulation installation box and extends to the outside of the insulation installation box. At the same time, a plurality of nozzles are opened at the outer end of the high-efficiency gun head, and the plurality of nozzles are divided into two layers of ring arrangements.

[0008] Preferably, a mounting seat is provided in the middle of the outer side of the thermal insulation mounting box, and the mounting seat is a circular structure. At the same time, electric telescopic rods are symmetrically provided on both sides of the mounting seat, and the output end of the electric telescopic rod is connected to the limit baffle provided on the side of the thermal insulation mounting box away from the high-efficiency gun head.

[0009] Preferably, the heat-insulating installation box forms a movable structure with the installation seat through an electric telescopic rod and a limit baffle.

[0010] Preferably, the heat-insulating installation box is provided with a positioning frame on one side of the air delivery pipe, and the positioning frame is engaged with the outside of the air delivery pipe.

[0011] Compared with the prior art, the beneficial effects of the present invention are: the gun head for the methanol ignition device of the pulverized coal boiler,

[0012] (1) In order to solve the problems that the existing ignition device uses diesel ignition, which results in high diesel consumption and black smoke during ignition, and is costly, and uses plasma ignition, which results in high power consumption and difficulty in igniting pulverized coal, which easily causes secondary combustion in the tail flue, the present application uses methanol ignition instead of diesel and plasma ignition, which reduces the cost of ignition and stable combustion, and saves fuel by adding pulverized coal to the boiler in advance;

[0013] (2) In order to solve the problem that the existing methanol gun only uses the installation method of the diesel ignition device and the ignition method has not changed, resulting in the ignition powder feeding time not changing, the present application increases the original one circle of nozzles in the high-efficiency gun head to two circles, which are arranged in two layers, and then matched with a methanol ignition system, so that methanol is atomized and mixed with air and ignited by the igniter. The mixed gas is ejected from the nozzle opened on the high-efficiency gun head, thereby igniting the coal powder. The present application changes the way of igniting the coal powder by optimizing the position and arrangement of the nozzles of the methanol ignition gun head, thereby improving the practicality of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model from above;

[0015] Figure 2 This is a schematic diagram of the top view of the structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the high-efficiency gun head of the utility model.

[0017] In the figure: 1. Mounting base; 2. Insulated mounting box; 201. Positioning card frame; 3. Limit baffle; 4. Electric telescopic rod; 5. Methanol delivery pipe; 6. Methanol quantitative delivery pump; 7. Atomizer; 8. Mixer; 9. Air delivery pipe; 10. Air quantitative delivery pump; 11. Ignitor; 12. High-efficiency gun head; 13. Nozzle. DETAILED DESCRIPTION

[0018] See also Figure 1-3 The utility model provides a technical solution: a gun head for a methanol ignition device for a pulverized coal boiler, according to Figure 1 and Figure 2As shown, the methanol ignition system is installed inside the heat-insulating installation box 2. The heat-insulating installation box 2 is convenient for protecting the methanol ignition system to avoid damage to equipment in the methanol ignition system due to high temperature during use, thereby affecting work efficiency. The methanol ignition system includes a methanol delivery pipe 5, a mixer 8, an air delivery pipe 9 and an igniter 11. A methanol quantitative delivery pump 6 is installed on the methanol delivery pipe 5, and one end of the methanol delivery pipe 5 is connected to one end of the atomizer 7, while the other end of the atomizer 7 is connected to one end of the mixer 8. An air quantitative delivery pump 10 is installed on the air delivery pipe 9, and one end of the air delivery pipe 9 is connected to the lower end of one side of the mixer 8, while the igniter 11 is installed on the upper end of the other side of the mixer 8.

[0019] Further explanation: a mounting seat 1 is provided in the middle of the outer side of the heat-insulating mounting box 2, and the mounting seat 1 is a circular structure. At the same time, electric telescopic rods 4 are symmetrically provided on both sides of the mounting seat 1. The output end of the electric telescopic rod 4 is connected to the limit baffle 3 provided on the side of the heat-insulating mounting box 2 away from the high-efficiency gun head 12. The heat-insulating mounting box 2 forms a mobile structure with the mounting seat 1 through the electric telescopic rod 4 and the limit baffle 3. The limit baffle 3 and the heat-insulating mounting box 2 are driven by the electric telescopic rod 4 to move in the middle of the mounting seat 1, which is convenient for adjusting the flame spraying position of the high-efficiency gun head 12, so that the contact position of the coal powder is more accurate and the coal powder combustion efficiency is improved. The heat-insulating mounting box 2 is provided with a positioning card frame 201 on one side of the air delivery pipe 9, and the positioning card frame 201 is engaged with the outside of the air delivery pipe 9, which is convenient for positioning the air delivery pipe 9.

[0020] according to Figure 1 、 Figure 2 and Figure 3 As shown, a high-efficiency gun head 12 is installed at the other end of the mixer 8 opposite to the atomizer 7, and the high-efficiency gun head 12 passes through the heat-insulating installation box 2 and extends to the outside of the heat-insulating installation box 2. At the same time, a plurality of nozzles 13 are opened at the outer end of the high-efficiency gun head 12, and the plurality of nozzles 13 are divided into two layers of annular arrangement to improve the combustion efficiency of pulverized coal.

[0021] During use, the mounting base 1 is fixed to the boiler wall by installing screws, and then the electric telescopic rod 4 is started, so that the limit baffle 3 and the insulation mounting box 2 move inside the mounting base 1 under the action of the electric telescopic rod 4, and the high-efficiency gun head 12 is moved to the coal powder spraying location, and then the methanol quantitative delivery pump 6, the atomizer 7, the mixer 8, the air quantitative delivery pump 10 and the igniter 11 are started. Through the methanol quantitative delivery pump 6 and the air quantitative delivery pump 10, methanol is quantitatively delivered to the inside of the atomizer 7 through the methanol delivery pipe 5 for atomization, and air is quantitatively delivered to the mixing chamber in the mixer 8 through the air delivery pipe 9. Then, the atomized methanol enters the mixing chamber in the mixer 8 and mixes with the air. After mixing is completed, the mixed gas enters the heating chamber in the mixer 8, and then the electric spark system inside the igniter 11 generates a high-energy arc or electric spark, and at an appropriate time, the spark is transferred to the heating chamber to ignite the mixed gas. The ignited mixed gas is then ejected through the nozzle 13 opened on the high-efficiency gun head 12, thereby igniting and burning the coal powder.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lance head for a methanol ignition device for a pulverized coal boiler, comprising a methanol ignition system and a high-efficiency lance head (12), characterized in that: The methanol ignition system is installed inside the heat-insulating installation box (2), and the methanol ignition system includes a methanol delivery pipe (5), a mixer (8), an air delivery pipe (9) and an igniter (11); a methanol quantitative delivery pump (6) is installed on the methanol delivery pipe (5), and one end of the methanol delivery pipe (5) is connected to one end of the atomizer (7), and the other end of the atomizer (7) is connected to one end of the mixer (8); an air quantitative delivery pump (10) is installed on the air delivery pipe (9), and one end of the air delivery pipe (9) is connected to the lower end of one side of the mixer (8), and the igniter (11) is installed on the upper end of the other side of the mixer (8); The high-efficiency gun head (12) is installed at the other end of the mixer (8) opposite to the atomizer (7), and the high-efficiency gun head (12) penetrates the heat-insulating installation box (2) and extends to the outside of the heat-insulating installation box (2). At the same time, a plurality of nozzles (13) are opened at the outer end of the high-efficiency gun head (12), and the plurality of nozzles (13) are divided into two layers of annular arrangement.

2. The lance tip for the methanol ignition device for a pulverized coal boiler according to claim 1, characterized in that: A mounting seat (1) is provided in the middle of the outer side of the heat-insulating mounting box (2), and the mounting seat (1) is a circular structure. Electric telescopic rods (4) are symmetrically provided on both sides of the mounting seat (1), and the output end of the electric telescopic rod (4) is connected to a limit baffle (3) provided on the side of the heat-insulating mounting box (2) away from the high-efficiency gun head (12).

3. The lance tip for the methanol ignition device for a pulverized coal boiler according to claim 1, characterized in that: The heat-insulating installation box (2) forms a movable structure with the installation seat (1) through an electric telescopic rod (4) and a limit baffle (3).

4. The lance tip for a methanol ignition device for a pulverized coal boiler according to claim 1, characterized in that: The heat-insulating installation box (2) is provided with a positioning card frame (201) on one side of the air delivery pipe (9), and the positioning card frame (201) is engaged with the outside of the air delivery pipe (9).

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