Combustion-supporting device of power plant boiler

Abstract

The utility model discloses a power plant boiler combustion-supporting device which comprises a boiler body, the side face of the boiler body is fixedly connected with a fixing plate, the upper surface of the fixing plate is fixedly connected with a fan, the fan is fixedly connected with a connecting pipe, one end of the connecting pipe is fixedly connected with a barrel, the outer side of the barrel is fixedly connected with an air outlet, and the inner wall of the barrel is fixedly connected with one end of a guide rod. A guide sleeve is arranged on the outer side of the guide rod, the outer side of the guide sleeve is fixedly connected with a limiting plate, the guide sleeve is sleeved with a spring, the top of the guide sleeve is fixedly connected with the umbrella top, and the upper surface of the fixing plate is fixedly connected with the heat exchange cylinder. Through the barrel, the air outlet, the guide rod, the guide sleeve, the limiting plate, the spring and the umbrella top, the barrel is protected through the umbrella top, the problem that ash and excessive pulverized coal enter and are not easy to clean is solved, through the boiler body, the heat exchange barrel, the air inlet pipe, the heat exchange pipe, the filter barrel and the air outlet pipe, cold air is prevented from entering the boiler to absorb more heat, and the heat exchange efficiency is improved. The combustion-supporting effect of the boiler is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler combustion support, in particular to a combustion support device for a boiler in a power plant. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. A coal-fired boiler in a power plant is a boiler that uses coal fuel for combustion to generate steam to drive a generator to generate electricity. When in use, the coal is crushed and ground into fine coal powder, which then enters the combustion chamber for combustion to generate heat energy to heat water and generate steam. The steam is then transported to the steam turbine for expansion to drive the generator to generate electricity.

[0003] During the use of the boiler, air or combustion-supporting materials need to be introduced to achieve the effect of supporting combustion. Usually, air is introduced through the cooperation of a fan and an air pipe. Since one end of the air pipe is open, burning ash or coal powder is easy to fall into the air pipe during the use of the boiler. The air pipe also needs to be sealed when cleaning the inner wall of the boiler, which affects actual use. In addition, the temperature of the air is low when it enters the boiler, which will absorb more heat energy and reduce the combustion effect of the boiler. At present, most people use hot air blowers to heat the air, which will increase the cost of using the boiler. Utility Model Content

[0004] The purpose of the utility model is to provide a combustion-supporting device for a power plant boiler to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combustion-supporting device for a boiler in a power plant, comprising a boiler body, a side surface of the boiler body being fixedly connected to a fixing plate, an upper surface of the fixing plate being fixedly connected to a fan, the fan being fixedly connected to a connecting pipe, one end of the connecting pipe being fixedly connected to a cylinder, the outer side of the cylinder being fixedly connected to an air outlet, an inner wall of the cylinder being fixedly connected to one end of a guide rod, a guide sleeve being arranged on the outer side of the guide rod, the outer side of the guide sleeve being fixedly connected to a limiting plate, a spring being sleeved on the outer side of the guide sleeve, the top of the guide sleeve being fixedly connected to an umbrella top, the upper surface of the fixing plate being fixedly connected to a heat exchange cylinder, the heat exchange cylinder being fixedly connected to one end of an air inlet pipe, a heat exchange tube being sleeved inside the heat exchange cylinder, one end of the heat exchange tube being fixedly connected to a filter cylinder, and the outer side of the heat exchange cylinder being fixedly connected to an air outlet pipe.

[0006] Preferably, the input end and the output end of the fan are respectively connected to the heat exchange tube and the connecting tube, the heat exchange tube is spirally distributed inside the heat exchange tube, one end of the heat exchange tube extends to the outside of the heat exchange tube and is fixedly connected to the filter tube, and one end of the connecting tube extends to the inside of the boiler body and is fixedly connected to the cylinder.

[0007] Preferably, the air outlet is located at the top of the cylinder, the air outlet is evenly distributed in a linear array outside the cylinder, the air outlet is connected to the inside of the cylinder, one end of the guide sleeve passes through the air outlet and is fixedly connected to the umbrella top, and the umbrella top is a conical plate.

[0008] Preferably, a circular through hole is provided inside the guide sleeve, and the guide sleeve is slidably connected to the outer side of the guide rod through the circular through hole.

[0009] Preferably, one end of the air inlet pipe is fixedly connected to the top of the boiler body, the other end of the air inlet pipe is fixedly connected to the top of the heat exchange tube, and one end of the air outlet pipe is fixedly connected to the bottom of the heat exchange tube.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The utility model is provided with a cylinder, an air outlet, a guide rod, a guide sleeve, a limit plate, a spring and an umbrella top. The air is allowed to enter the cylinder through a connecting pipe by a fan. The air will push the umbrella top to move upward. At this time, a gap is formed between the umbrella top and the air outlet so that air or combustion-supporting materials can enter the boiler to achieve a combustion-supporting effect. When the fan is turned off to stop the combustion, the elastic force of the spring is used to make the guide sleeve slide downward on the outside of the guide rod. The cylinder is protected by the fit of the umbrella top and the air outlet to avoid the problem of difficulty in cleaning caused by the entry of ash and excess coal powder.

[0012] 2. The utility model also provides a boiler body, a heat exchange tube, an air inlet pipe, a heat exchange tube, a filter tube and an air outlet pipe, so that the high temperature discharged from the boiler body is passed into the heat exchange tube, thereby preheating the air or combustion-supporting materials in the heat exchange tube, avoiding cold air from entering the boiler to absorb more heat, thereby improving the combustion-supporting effect of the boiler, and effectively utilizing the high-temperature exhaust gas inside the boiler to reduce the use cost of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0015] Figure 3 This is a cross-sectional view of the internal structure of the cylinder of the utility model;

[0016] Figure 4 It is a cross-sectional view of the internal structure of the guide sleeve of the utility model.

[0017] In the figure: 1. Boiler body; 2. Fixing plate; 3. Fan; 4. Connecting pipe; 5. Cylinder; 6. Air outlet; 7. Guide rod; 8. Guide sleeve; 9. Limit plate; 10. Spring; 11. Umbrella top; 12. Heat exchange cylinder; 13. Air inlet pipe; 14. Heat exchange tube; 15. Filter cylinder; 16. Air outlet pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 The utility model provides a technical solution: a combustion-supporting device for a power plant boiler, comprising a boiler body 1, the side of the boiler body 1 is welded and fixed to a fixing plate 2, the upper surface of the fixing plate 2 is matched and connected to the bottom of a fan 3 by bolts, the output end of the fan 3 is connected and fixed to a connecting pipe 4 at one end by a flange, one end of the connecting pipe 4 is welded and fixed to the outside of a cylinder 5, the cylinder 5 is located inside the boiler body 1, the outside of the cylinder 5 is welded and fixed to a plurality of air outlets 6, the air outlets 6 are connected to the inside of the cylinder 5, the air outlets 6 are hollow circular tubes, the inner wall of the cylinder 5 is welded and fixed to one end of a guide rod 7, the outer side of the guide rod 7 is connected to a guide sleeve 8 A circular through hole is provided, the outer side of the guide sleeve 8 is welded and fixed to the limit plate 9, a spring 10 is sleeved on the outer side of the guide sleeve 8, the spring 10 is located between the cylinder 5 and the limit plate 9, the top of the guide sleeve 8 is welded and fixed to the umbrella top 11, the upper surface of the fixing plate 2 is welded and fixed to the heat exchange cylinder 12, the heat exchange cylinder 12 is welded and fixed to one end of the air inlet pipe 13, the other end of the air inlet pipe 13 is connected to the top of the boiler body 1, a heat exchange tube 14 is sleeved inside the heat exchange cylinder 12, one end of the heat exchange tube 14 extends to the outer side of the heat exchange cylinder 12 and is welded and fixed to the filter cylinder 15, a filter screen is arranged inside the filter cylinder 15, the outer side of the heat exchange cylinder 12 is welded and fixed to the outlet pipe 16,

[0020] The input end and output end of the fan 3 are connected with the heat exchange tube 14 and the connecting tube 4 respectively. The heat exchange tube 14 is spirally distributed inside the heat exchange tube 12. One end of the heat exchange tube 14 extends to the outside of the heat exchange tube 12 and is welded and fixed to the filter tube 15. One end of the connecting tube 4 extends to the inside of the boiler body 1 and is welded and fixed to the cylinder 5. The high-temperature exhaust gas generated by the boiler body 1 will pass into the heat exchange tube 12 from the air inlet pipe 13 and then be discharged from the air outlet pipe 16. Since the heat exchange tube 14 is spirally distributed, the contact area between the heat exchange tube 14 and the high-temperature air is expanded, and the heat exchange time between the combustion-supporting air and the high-temperature air is prolonged, thereby enhancing the preheating effect of the air and avoiding the problem of cold air passing into the boiler body 1 to absorb more heat. The air outlet 6 is located at the top of the cylinder 5, and the air outlet The ports 6 are evenly distributed in a linear array on the outside of the cylinder 5, the air outlet 6 is connected to the inside of the cylinder 5, one end of the guide sleeve 8 passes through the air outlet 6 and is welded and fixed to the umbrella top 11, the umbrella top 11 is a conical plate, a circular through hole is provided inside the guide sleeve 8, the guide sleeve 8 is slidably connected to the outside of the guide rod 7 through the circular through hole, one end of the air inlet pipe 13 is welded and fixed to the top of the boiler body 1, the other end of the air inlet pipe 13 is welded and fixed to the top of the heat exchange cylinder 12, and one end of the air outlet pipe 16 is welded and fixed to the bottom of the heat exchange cylinder 12. When the fan 3 is closed, the elastic force of the spring 10 is used to push the limit plate 9 to move downward, so that the guide sleeve 8 and the umbrella top 11 move downward, and the guide rod 7 is protected by the fit between the umbrella top 11 and the guide rod 7, so as to prevent ash and excess coal powder from entering from the open end of the guide rod 7;

[0021] Working principle: When the boiler body 1 is in use, the air is filtered by the filter cartridge 15 and then enters the heat exchange tube 14 through the fan 3, and then enters the cylinder 5 through the connecting pipe 4, so that the pressure inside the cylinder 5 increases, thereby pushing the umbrella top 11 to move upward, and at the same time driving the guide sleeve 8 and the limit plate 9 to move upward. The limit plate 9 moves upward and squeezes the spring 10. When the umbrella top 11 moves upward, a gap is generated between it and the guide rod 7, and air or combustion-supporting materials are discharged from the gap into the boiler body 1 for combustion. When the fan 3 is turned off, the spring 10 is used to The elastic force pushes the limit plate 9 to move downward, thereby causing the guide sleeve 8 and the umbrella top 11 to move downward. The fit between the umbrella top 11 and the guide rod 7 forms a protection for the guide rod 7, preventing ash and excess coal powder from entering from the open end of the guide rod 7; the high-temperature exhaust gas in the boiler body 1 will enter the heat exchange tube 12 through the air inlet pipe 13. Since the heat exchange tube 14 is spirally distributed inside the heat exchange tube 12, the heat exchange area is increased, and the air inside the heat exchange tube 14 is preheated by high-temperature air, further enhancing the subsequent combustion-supporting effect of the air.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combustion-supporting device for a power plant boiler, comprising a boiler body (1), characterized in that: The side surface of the boiler body (1) is fixedly connected to the fixing plate (2), the upper surface of the fixing plate (2) is fixedly connected to the fan (3), the fan (3) is fixedly connected to the connecting pipe (4), one end of the connecting pipe (4) is fixedly connected to the cylinder (5), the outer side of the cylinder (5) is fixedly connected to the air outlet (6), the inner wall of the cylinder (5) is fixedly connected to one end of the guide rod (7), the outer side of the guide rod (7) is provided with a guide sleeve (8), and the outer side of the guide sleeve (8) is connected to the limit plate (9). The guide sleeve (8) is fixedly connected, a spring (10) is sleeved on the outside of the guide sleeve (8), the top of the guide sleeve (8) is fixedly connected to the umbrella top (11), the upper surface of the fixing plate (2) is fixedly connected to the heat exchange tube (12), the heat exchange tube (12) is fixedly connected to one end of the air inlet pipe (13), a heat exchange tube (14) is sleeved inside the heat exchange tube (12), one end of the heat exchange tube (14) is fixedly connected to the filter tube (15), and the outside of the heat exchange tube (12) is fixedly connected to the air outlet pipe (16).

2. A combustion-supporting device for a power plant boiler according to claim 1, characterized in that: The input end and the output end of the fan (3) are respectively connected to the heat exchange tube (14) and the connecting tube (4); the heat exchange tube (14) is spirally distributed inside the heat exchange tube (12); one end of the heat exchange tube (14) extends to the outside of the heat exchange tube (12) and is fixedly connected to the filter tube (15); one end of the connecting tube (4) extends to the inside of the boiler body (1) and is fixedly connected to the cylinder (5).

3. A combustion-supporting device for a power plant boiler according to claim 1, characterized in that: The air outlet (6) is located at the top of the cylinder (5), and the air outlet (6) is evenly distributed in a linear array on the outside of the cylinder (5). The air outlet (6) is connected to the inside of the cylinder (5), and one end of the guide sleeve (8) passes through the air outlet (6) and is fixedly connected to the umbrella top (11), and the umbrella top (11) is a conical plate.

4. A combustion-supporting device for a power plant boiler according to claim 1, characterized in that: A circular through hole is provided inside the guide sleeve (8), and the guide sleeve (8) is slidably connected to the outer side of the guide rod (7) through the circular through hole.

5. The combustion-supporting device for a power plant boiler according to claim 1, characterized in that: One end of the air inlet pipe (13) is fixedly connected to the top of the boiler body (1), the other end of the air inlet pipe (13) is fixedly connected to the top of the heat exchange tube (12), and one end of the air outlet pipe (16) is fixedly connected to the bottom of the heat exchange tube (12).

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