Pulverized coal distributor with multiple adjusting modes

Abstract

The utility model provides a pulverized coal distributor with multiple adjusting modes, which comprises a channel, at least one outlet and at least one inlet are respectively arranged on two sides of the channel, the inside of the channel is divided into a thick side and a thin side by a thick-thin airflow partition plate, a thick side airflow adjusting baffle is rotatably arranged in the thick side, and a thin side airflow adjusting baffle is rotatably arranged in the thin side. A light side airflow adjusting baffle is rotationally arranged in the light side, at least one shutter concentrator is arranged between the thick and light airflow partition plate and the outlet, and at least one concentrator adjustable blade is rotationally arranged in the shutter concentrator. The louver concentrator with the adjustable blades is adopted, when the operation working condition of a boiler and the combustion coal quality change greatly, the inclination angle of the adjustable blades of the concentrator can be adjusted through rotation of the rotating handle to ensure that the separation effect of the pulverized coal distributor is always at a high level, and therefore it is ensured that the pulverized coal distributor always has the good adjusting characteristic.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a pulverized coal distributor with multiple adjustment methods. Background Art

[0002] The pulverized coal distributor is arranged on the pulverized coal pipeline behind the coal mill in a coal-fired power plant and is used to evenly distribute the air and pulverized coal in one pulverized coal pipeline into two pulverized coal pipelines. The quality of its distribution uniformity directly affects the combustion condition of the boiler.

[0003] Currently, the most widely used is the double-adjustable pulverized coal distributor. This kind of pulverized coal distributor first uses a louver-type pulverized coal concentrator to separate the incoming pulverized coal air flow into thick and thin streams. The separated thick and thin air flows respectively enter two channels, and the powder quantity and air quantity in the two outlet pulverized coal pipelines are evenly distributed by adjusting the opening degrees of the baffles in the channels respectively.

[0004] The quality of the adjustment characteristics of the double-adjustable pulverized coal distributor completely depends on the separation effect of the louver concentrator therein, that is, the better the separation effect of the louver concentrator, the better the adjustment characteristics of the pulverized coal distributor; when the separation effect of the louver concentrator deteriorates, the adjustment characteristics of the pulverized coal distributor also deteriorate accordingly.

[0005] The structural dimensions of the louver pulverized coal concentrator, such as the blade inclination angle, blade spacing, and blade length, etc., are designed and determined under certain conditions of air flow velocity, pulverized coal concentration, and pulverized coal particle size, etc. The blades are fixed in the louver concentrator. When the boiler operation condition or the coal quality used changes, the air flow velocity, pulverized coal concentration, etc. entering the pulverized coal distributor also change, and will deviate significantly from the design conditions of the louver pulverized coal concentrator, thus reducing the separation effect of the louver concentrator. Summary of the Utility Model

[0006] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a pulverized coal distributor with multiple adjustment methods, by adopting blades with adjustable inclination angles in the louver concentrator to adapt to the changes of the boiler operation condition and the coal quality used, so that the louver concentrator can always maintain a high separation effect, thereby effectively solving the foregoing problems and significantly improving the adjustment adaptability of the pulverized coal distributor.

[0007] To achieve the above and other related objectives, the present utility model provides a pulverized coal distributor with multiple adjustment methods, including a channel. At least one outlet and at least one inlet are respectively arranged on both sides of the channel. The channel is divided into a thick side and a thin side by a thick and thin air flow separator plate. A thick side air flow adjustment baffle is rotatably arranged in the thick side, and a thin side air flow adjustment baffle is rotatably arranged in the thin side. And at least one louver concentrator is arranged between the thick and thin air flow separator plate and the outlet. The louver concentrator includes at least one concentrator adjustable blade that can rotate relative to the channel.

[0008] Further, the louver concentrator includes a concentrator housing, and a concentrator adjustable blade is rotatably arranged in the concentrator housing.

[0009] Further, a fixed separation block is arranged in the channel.

[0010] Further, a guide plate is arranged at the end of the thick and thin air flow separator plate.

[0011] Further, there are two louver concentrators.

[0012] Further, the concentrator adjustable blades are all connected to a rotating handle, and the rotating handle penetrates through the louver housing and the channel and extends outside the channel.

[0013] Further, a wear-resistant layer is arranged in the channel. The wear-resistant layer is a silicon carbide layer, and the thickness of the wear-resistant layer is 20 - 30 mm.

[0014] Further, there is one inlet, and an inlet square-round joint is arranged at the inlet.

[0015] Further, there are two outlets, and an outlet square-round joint is arranged at each outlet.

[0016] As described above, a pulverized coal distributor with multiple adjustment methods of the present utility model has the following beneficial effects:

[0017] The pulverized coal distributor with multiple adjustment methods described in this application adds a louver concentrator with adjustable blades to the basis of setting adjustment baffles in the thick and thin side air flow channels. Through the rotation of the concentrator adjustable blades, it has multiple adjustment means and constitutes a pulverized coal distributor with multiple adjustment methods. By using a louver concentrator with adjustable blades, when the boiler operation conditions and the coal quality burned change greatly, the inclination angle of the concentrator adjustable blades can be adjusted by rotating the rotating handle to ensure that the separation effect of the pulverized coal distributor is always at a high level, so as to ensure that the pulverized coal distributor always has good adjustment characteristics. Brief Description of the Drawings

[0018] Figure 1 It is a cross-sectional schematic view of the pulverized coal distributor described in this application.

[0019] Figure 2 This is another perspective cross-sectional schematic diagram of the pulverized coal distributor described in this application.

[0020] In the figure: 1. Channel; 2. Fixed separation block; 3. Concentrator adjustable vane; 4. Deflector; 5. Dense and lean gas flow separator; 6. Dense side gas flow regulating baffle; 7. Lean side gas flow regulating baffle; 8. Inlet square-round joint; 9. Outlet square-round joint; 10. Dense side rotating shaft; 11. Lean side rotating shaft; 12. Rotating handle; 13. Louver concentrator. Detailed implementation manners

[0021] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0022] Please refer to Figures 1 to 2 . It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed by the present invention can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0023] The present invention provides a pulverized coal distributor with multiple adjustment methods, including a channel 1. The channel 1 is divided into a dense side and a lean side by a dense and lean gas flow separator 5, and the area of the lean side is larger than that of the dense side. An inlet and an outlet are respectively arranged on both sides of the channel 1. There is one inlet and two outlets, and the two outlets are respectively communicated with the dense side and the lean side. The dense and lean gas flow separator 5 is arranged on one side of the outlet in the channel 1. At the same time, the length of the dense and lean gas flow separator 5 is less than the length of the entire channel 1.

[0024] And a deflector 4 is arranged at the end of the dense and lean gas flow separator 5. The deflector 4 is offset towards the dense side, and the designed inclination angle between the deflector 4 and the dense and lean gas flow separator 5 is 15 - 20°. The deflector 4 is used to guide the pulverized coal particles entering the dense side and the single side.

[0025] In this embodiment, there is one inlet, and an inlet square-round adapter 8 is arranged at the inlet, and the maximum inclination angle of the side wall of the inlet square-round adapter 8 is ≤20°. There are two outlets, and an outlet square-round adapter 9 is arranged at each outlet, and the maximum inclination angle of the side wall of the outlet square-round adapter 9 is ≤30°.

[0026] Meanwhile, a fixed separation block 2 is arranged at the inlet. The number of the fixed separation blocks 2 is one, and it adopts a triangular blunt body structure. The design inclination angle between the fixed separation block 2 and the inlet is 25-30°. The fixed separation block 2 plays a guiding role in changing the movement direction of the pulverized coal particles, so that the pulverized coal mixture can be preliminarily separated into upper and lower concentrations at the inlet and the inlet square-round adapter.

[0027] Meanwhile, a thick-side air flow regulating baffle 6 is rotatably arranged inside the thick side, and a thin-side air flow regulating baffle 7 is rotatably arranged inside the thin side. The thick-side air flow regulating baffle 6 is driven by a thick-side rotating shaft 10 extending out of the channel 1 to rotate for adjusting the opening and closing angle. The thin-side air flow regulating baffle 7 is driven by a thin-side rotating shaft 11 extending out of the channel 1 to rotate for adjusting the opening and closing angle. Among them, the thick-side air flow regulating baffle 6 is adjusted by rotating the thick-side rotating shaft 10, and the adjustment range is ±30°. The thin-side air flow regulating baffle 7 rotates by rotating the thin-side rotating shaft 11, and the adjustment range is 0-90°.

[0028] Meanwhile, in this embodiment, between the guide plate 4 and the fixed separation block 2, at least one louver concentrator 13 is arranged inside the channel 1. In this embodiment, two louver concentrators 13 with the same structure are arranged, and the louver concentrators 13 extend from one inner surface of the channel 1 to the opposite inner surface, so that the pulverized coal air flow must pass through the louver concentrators 13 from the inlet to the outlet.

[0029] The louver concentrator 13 includes a concentrator housing fixedly arranged inside the channel 1. The concentrator housing is fixedly arranged inside the channel 1 by welding. Meanwhile, at least one concentrator adjustable blade 3 is rotatably arranged inside the concentrator housing. In this embodiment, one concentrator adjustable blade 3 is arranged. The concentrator adjustable blade 3 is rotatably arranged inside the concentrator housing, and the concentrator adjustable blade 3 is connected with a rotating handle 12. The rotating handle 12 passes through the concentrator housing and the channel and extends out of the channel 1, so that by rotating the rotating handle 12, the concentrator adjustable blade 3 is driven to rotate inside the concentrator housing to achieve the adjustment of the opening and closing angle, so as to separate the pulverized coal air flow entering the channel into thick and thin concentrations. And the design inclination angle of the concentrator adjustable blade 3 is 25-30°, and the adjustment range is ±15°.

[0030] In this embodiment, in order to protect Channel 1 and the components arranged in Channel 1, a wear-resistant layer is arranged in Channel 1. The wear-resistant layer is a silicon carbide layer, and the thickness of the wear-resistant layer is 20 - 30 mm. The silicon carbide layer is fixedly arranged on the surface of Channel 1 and the surface of the components in Channel 1 by means of high-temperature sintering.

[0031] During specific use, on the basis of arranging adjusting baffles in the thick and lean side air flow channels, this pulverized coal distributor is added with a louver concentrator with adjustable vanes. By rotating the adjustable vanes 3 of the concentrator, it has multiple adjustment means and constitutes a pulverized coal distributor with various adjustment methods. By adopting the louver concentrator 13 with adjustable vanes, when the operating conditions of the boiler and the coal quality of the fuel used change greatly, the inclination angle of the adjustable vanes 3 of the concentrator can be adjusted by rotating the handle 12 to ensure that the separation effect of the pulverized coal distributor always remains at a relatively high level, so as to ensure that the pulverized coal distributor always has good adjustment characteristics.

[0032] The above embodiments only illustratively explain the principles and effects of the present invention, rather than being used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A pulverized coal distributor with multiple adjustment methods, characterized in that: It includes a channel, with at least one outlet and at least one inlet respectively arranged on both sides of the channel. The channel is divided into a rich side and a lean side by a rich-lean gas flow separator plate. A rich-side gas flow regulating baffle is rotatably arranged in the rich side, and a lean-side gas flow regulating baffle is rotatably arranged in the lean side. And at least one louver concentrator is arranged between the rich-lean gas flow separator plate and the outlet. The louver concentrator includes at least one concentrator adjustable blade that can rotate relative to the channel.

2. The pulverized coal distributor with multiple adjustment methods according to claim 1, characterized in that: The louver concentrator includes a concentrator housing, and a concentrator adjustable blade is rotatably arranged in the concentrator housing.

3. The pulverized coal distributor with multiple adjustment methods according to claim 1, characterized in that: A fixed separation block is arranged in the channel.

4. A pulverized coal distributor with multiple adjustment methods according to claim 1, characterized in that: A guide plate is arranged at the end of the rich-lean gas flow separator plate.

5. A pulverized coal distributor with multiple adjustment methods according to claim 1, characterized in that: There are two louver concentrators.

6. A pulverized coal distributor with multiple adjustment methods according to claim 1, characterized in that: All the concentrator adjustable blades are connected to a rotating handle, and the rotating handle penetrates through the louver housing and the channel and extends outside the channel.

7. A pulverized coal distributor with multiple adjustment methods according to claim 1, characterized in that: A wear-resistant layer is arranged in the channel. The wear-resistant layer is a silicon carbide layer, and the thickness of the wear-resistant layer is 20 - 30 mm.

8. A pulverized coal distributor with multiple adjustment methods according to claim 1, characterized in that: There is one inlet, and an inlet square-round joint is arranged at the inlet.

9. The pulverized coal distributor with multiple adjustment methods according to claim 1, characterized in that: There are two outlets, and an outlet square-round joint is arranged at each outlet.

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