Blast feeding device for boiler

Abstract

The utility model relates to the technical field of boilers, in particular to an air blast feeding device for boilers, which comprises a boiler, a feeding system and an air blast system, the feeding system comprises a belt conveyor, a fuel hopper and a spiral conveyor oppositely arranged on the outer side of the boiler, the fuel hopper is arranged in a Y-shaped forking mode, and two ends of the lower portion of the fuel hopper are communicated with discharge pipes. The discharging pipe is communicated with the feeding end of the spiral conveyor; the belt conveyor is obliquely arranged upwards in the direction of the fuel hopper, and the discharging end of the belt conveyor extends to the position over the fuel hopper; the air blowing system comprises an air blower and an air blowing pipeline, the air outlet end of the air blower is communicated with the air blowing pipeline, one end of the air blowing pipeline extends upwards and is bent to extend to the spiral conveyor, air blowing branch pipes are arranged at intervals, and the air blowing branch pipes are communicated with the discharging end of the spiral conveyor. Air is forcibly fed into the hearth through the air blast system, so that fuel and oxygen are fully mixed to be combusted in the hearth in a suspension manner, the combustion efficiency is improved, and the loss of unburned fuel is reduced.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to a boiler blower feeding device. Background Technology

[0002] A boiler is a device that uses the heat energy released by the combustion of fuel or other heat energy to heat water or other working fluids to produce steam, hot water or other working fluids with specified parameters (temperature, pressure) and quality. In this process, the fuel burns in the furnace to release heat, which heats the water or working fluid in the furnace and produces high-temperature flue gas. The high-temperature flue gas transfers heat to the boiler's heating surfaces through the furnace and flue, ultimately heating the working fluid to produce steam or hot water. The steam or hot water is then transported to the required location through pipelines. The fuel that releases heat through combustion is usually biomass, rice husks, small pellet fuels, etc.

[0003] When existing boilers are working normally, fuel is sent into the furnace for combustion. However, incomplete combustion of fuel in the furnace can easily occur, resulting in the loss of unburned fuel and low combustion efficiency. Summary of the Invention

[0004] This invention addresses the problems of incomplete combustion and low combustion efficiency of fuel in existing furnaces by providing a boiler-mounted air-feeding device. This device forces air into the furnace through a blower system, allowing the fuel and oxygen to mix fully and burn in suspension within the furnace. This ensures complete combustion of the fuel in the furnace, improves combustion efficiency, reduces the loss of unburned fuel, and enables a continuous and stable fuel supply.

[0005] To achieve the above objectives, the technical solution of this utility model is: a boiler-mounted forced-air feeding device, comprising a boiler, a feeding system, and a forced-air system. The feeding system includes a belt conveyor, a fuel hopper, and a screw conveyor positioned opposite to the outside of the boiler. The fuel hopper is bifurcated in a "pants" shape, with discharge pipes connected to both ends of its lower portion, and these discharge pipes are connected to the feed end of the screw conveyor. The belt conveyor is inclined upwards towards the fuel hopper, with its discharge end extending directly above the fuel hopper. The belt conveyor and screw conveyor function to transport fuel to the boiler, achieving a continuous and stable fuel supply and reducing the labor intensity of workers. Through the "pants"-shaped fuel hopper, fuel can enter different screw conveyors and be transported to the boiler furnace, expanding the fuel distribution range within the boiler furnace and thus ensuring complete combustion of the fuel in the furnace.

[0006] The blower system includes a blower and blower ducts. The blower's outlet is connected to the blower duct. One end of the blower duct extends upwards and bends to the screw conveyor, with branch blowers spaced at intervals. The branch blowers are connected to the discharge end of the screw conveyor. The blower is used to deliver air and fuel into the boiler furnace. The blower delivers air through the blower duct to the branch blowers. Simultaneously, the air carries the fuel entering the branch blowers into the boiler furnace and mixes thoroughly with the fuel, allowing the fuel to burn in suspension within the boiler furnace.

[0007] Preferably, the cross-sectional width of the fuel hopper fork gradually narrows from top to bottom, and the angle between the inner wall of the fuel hopper fork and the horizontal plane is smaller than the angle between the outer wall and the horizontal plane, so that the fuel can flow downwards and fall into the conveying cylinder of the screw conveyor through the discharge pipe.

[0008] Preferably, the fuel hopper is provided with multiple columns arranged circumferentially on its outer side, and the belt conveyor is provided with multiple support frames at intervals at its bottom. The columns support the fuel hopper, and the support frames support the belt conveyor, so that the discharge end of the belt conveyor is directly above the fuel hopper.

[0009] Preferably, a support base is fixedly installed on the outside of the boiler, and an mounting plate is vertically installed on the top of the support base. The drive unit of the screw conveyor is located on the top of the support base. The support base supports the screw conveyor. The screw conveyor is installed on the outside of the boiler through the action of the support base and the mounting plate.

[0010] Preferably, the discharge end of the screw conveyor is connected to the feed pipe, and both the feed end and the discharge end of the screw conveyor are provided with flanges. The feed end and the discharge end of the screw conveyor are respectively connected to the discharge pipe and the feed pipe through the flanges.

[0011] Preferably, the feed pipe is connected to the blower branch pipe, the axis of the feed pipe is perpendicular to the axis of the blower branch pipe, and the axis of the blower branch pipe is perpendicular to the axis of the blower pipe. The fuel conveyed by the screw conveyor is sequentially sent to the blower branch pipe through its discharge end and the feed pipe, so as to achieve the effect of the fuel being sent into the boiler furnace by air.

[0012] The beneficial effects of this utility model through the above technical solution are as follows:

[0013] This utility model has a reasonable structure and good performance. It forces air into the boiler furnace through a blower system so that the fuel and oxygen are fully mixed and suspended for combustion. The fuel combustion efficiency is high and it can burn completely in the boiler furnace, thereby reducing the loss of unburned fuel. At the same time, it can achieve a continuous and stable supply of fuel and reduce the labor intensity of workers.

[0014] This utility model feeding system uses belt conveyors and screw conveyors to transport fuel to the boiler furnace, achieving a continuous and stable fuel supply, effectively reducing the labor intensity of workers, and has a high degree of automation. At the same time, the fuel hopper is shaped like "pants" so that the fuel can be separately transported into the boiler furnace through two screw conveyors, expanding the distribution range of the fuel in the boiler furnace, avoiding the fuel being concentrated in the boiler furnace and causing incomplete combustion, and ensuring that the fuel is fully burned in the boiler furnace.

[0015] This utility model's blower system uses a blower to deliver air through a blower duct to a blower branch pipe. The air provides the power to transport fuel into the boiler furnace, enabling the air to deliver fuel into the boiler furnace, allowing the fuel to mix fully with oxygen and suspend for combustion, thereby improving fuel combustion efficiency and reducing the loss of unburned fuel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a boiler blower feeding device according to this utility model. Figure 1 (Excluding belt conveyors);

[0017] Figure 2 This is a schematic diagram of the structure of a boiler blower feeding device according to this utility model. Figure 2 (Excluding boilers);

[0018] Figure 3 This is a schematic diagram of the structure of the screw conveyor of this utility model;

[0019] Figure 4 yes Figure 2 A magnified structural diagram of point A in the middle.

[0020] The attached diagram is labeled as follows: 1 is the blower, 2 is the blower duct, 3 is the blower branch pipe, 4 is the support base, 5 is the mounting plate, 6 is the screw conveyor, 601 is the flange, 7 is the feed pipe, 8 is the fuel hopper, 9 is the discharge pipe, 10 is the belt conveyor, 11 is the support frame, and 12 is the boiler. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0022] like Figures 1-4As shown, a boiler feeding device includes a boiler 12, a feeding system, and a blower system. The feeding system includes a belt conveyor 10, a fuel hopper 8, and a screw conveyor 6 disposed opposite to the outside of the boiler 12. The fuel hopper 8 is bifurcated in a "pants" shape, and both ends of the lower part of the fuel hopper 8 are connected to discharge pipes 9, which are connected to the feed end of the screw conveyor 6. The belt conveyor 10 is inclined upward toward the fuel hopper 8, and its discharge end extends directly above the fuel hopper 8. The feeding system includes two screw conveyors installed outside the boiler. The belt conveyor 10 conveys the fuel upward and drops it into the fuel hopper 8 through its discharge end. Then, it enters the conveying cylinder of the screw conveyor 6 through the discharge pipe 9, where it is conveyed by the screw blades inside. Finally, it enters the blower branch pipe 3 through its discharge end. By setting the combustion hopper 8 into a "pants" shaped structure, the fuel entering the fuel hopper 8 can be separately fed into the two screw conveyors 6. The two screw conveyors 6 deliver the fuel into the furnace of the boiler 12, which can expand the distribution range of the fuel in the furnace of the boiler 12 and avoid the fuel being concentrated in the furnace of the boiler 12, which would lead to incomplete combustion and an increase in unburned fuel.

[0023] The blower system includes a blower 1 and a blower duct 2. The outlet end of the blower 1 is connected to the blower duct 2. One end of the blower duct 2 extends upward and bends to the screw conveyor 6, and is provided with blower branch pipes 3 at intervals. The blower branch pipes 3 are connected to the discharge end of the screw conveyor 6. The blower 1 is used to send air and fuel into the furnace of the boiler 12. The blower 1 is installed on the ground. The blower 1 can send air through the blower duct 2 into the blower branch pipes 3. The air acts as a power source to transport the fuel entering the blower branch pipes 3 into the furnace of the boiler 12 and mix it thoroughly with the fuel. The blower duct 2 has an overall "L" shape structure to facilitate connection with the blower branch pipes 3 and the discharge end of the screw conveyor 6. The blower branch pipes 3 on the blower duct 2 are connected to the blower duct 2.

[0024] The cross-sectional width of the forked section of the fuel hopper 8 gradually narrows from top to bottom. The angle between the inner sidewall of the forked section of the fuel hopper 8 and the horizontal plane is smaller than the angle between the outer sidewall and the horizontal plane, so that the fuel entering the fuel hopper 8 can flow downward and enter the conveying cylinder of the screw conveyor 6 through the discharge pipe 9.

[0025] Multiple columns are arranged circumferentially on the outer side of the fuel hopper 8, and multiple support frames 11 are arranged at intervals on the bottom of the belt conveyor 10. Four columns are installed circumferentially on the outer side of the fuel hopper 8, which support the fuel hopper 8. There are two support frames 11 at the bottom of the belt conveyor 10. The support frame 11 closer to the fuel hopper 8 is higher than the other support frame 11, so that the belt conveyor 10 is tilted upward and the discharge end is located above the fuel hopper 8, ensuring that the belt conveyor 10 can transport fuel into the fuel hopper 8.

[0026] A support base 4 is fixedly installed on the outside of the boiler 12, and an mounting plate 5 is vertically installed on the top of the support base 4. The drive unit of the screw conveyor 6 is located on the top of the support base 4. The support base 4 supports the screw conveyor 6, and the screw shaft of the screw conveyor 6 is rotatably connected to the mounting plate 5 through bearings. A reinforcing plate for stabilization is also installed on the outside of the mounting plate 5.

[0027] The discharge end of the screw conveyor 6 is connected to the feed pipe 7. Both the feed end and the discharge end of the screw conveyor 6 are provided with flanges 601. The feed end and the discharge end of the screw conveyor 6 are connected to the discharge pipe 9 and the feed pipe 7 respectively through the flanges 601. The ends of the discharge pipe 9 and the feed pipe 7 are fitted with flanges that cooperate with the flanges 601.

[0028] The feed pipe 7 is connected to the blower branch pipe 3. The axis of the feed pipe 7 is perpendicular to the axis of the blower branch pipe 3, and the axis of the blower branch pipe 3 is perpendicular to the axis of the blower pipe 2. This allows the fuel conveyed by the screw conveyor 6 to be sequentially sent to the blower branch pipe 3 through its discharge end and the feed pipe 7, so that the fuel is sent into the furnace of the boiler 12 by air.

[0029] The working principle of this utility model is as follows: When the boiler is in operation, the belt conveyor 10 conveys the fuel upward and drops it from its discharge end into the fuel hopper 8, which then enters the two forked parts of the fuel hopper 8. The fuel then enters the conveying cylinders of the two screw conveyors through the two discharge pipes 9. The fuel is conveyed to its discharge end by the screw blades in the conveying cylinder and enters the blower branch pipe 3 through the feed pipe 7. The blower 1 sends air to the blower branch pipe 3 through the blower pipe 2. The air sends the fuel that enters the blower branch pipe 3 to the furnace of the boiler 12. The air and fuel enter the furnace of the boiler 12 at the same time. The fuel and oxygen are fully mixed, and the fuel is suspended and burned in the furnace of the boiler 12 under the action of air, so that the fuel is fully burned, the combustion efficiency is high, and the loss of unburned fuel is reduced.

[0030] The embodiments described above are merely preferred embodiments of the utility model and are not intended to limit the scope of the utility model. Therefore, all equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent application should be included within the scope of the utility model patent application.

Claims

1. A boiler-mounted air-feeding device, comprising a boiler (12), characterized in that, It also includes a feeding system and a blower system. The feeding system includes a belt conveyor (10), a fuel hopper (8), and a screw conveyor (6) arranged opposite to the outside of the boiler (12). The fuel hopper (8) is bifurcated in the shape of "underpants". Both ends of the lower part of the fuel hopper (8) are connected to discharge pipes (9), which are connected to the feed end of the screw conveyor (6). The belt conveyor (10) is inclined upward toward the fuel hopper (8) and the discharge end extends to the top of the fuel hopper (8). The blower system includes a blower (1) and a blower duct (2). The blower (1) is connected to the blower duct (2) at its outlet end. One end of the blower duct (2) extends upward and bends to the screw conveyor (6), and is provided with blower branch pipes (3) at intervals. The blower branch pipes (3) are connected to the discharge end of the screw conveyor (6). The blower (1) is used to send air and fuel into the furnace of the boiler (12).

2. The boiler blower feeding device according to claim 1, characterized in that, The width of the cross section of the fuel hopper (8) gradually narrows from top to bottom, and the angle between the inner side wall of the fuel hopper (8) and the horizontal plane is smaller than the angle between the outer side wall and the horizontal plane.

3. The boiler blower feeding device according to claim 1, characterized in that, The fuel hopper (8) is provided with multiple columns on its outer periphery, and the belt conveyor (10) is provided with multiple support frames (11) at intervals on its bottom.

4. A boiler blower feeding device according to claim 1, characterized in that, A support base (4) is fixedly installed on the outside of the boiler (12), and an installation plate (5) is vertically installed on the top of the support base (4). The drive unit of the screw conveyor (6) is installed on the top of the support base (4).

5. A boiler blower feeding device according to claim 1, characterized in that, The discharge end of the screw conveyor (6) is connected to the feed pipe (7). Both the feed end and the discharge end of the screw conveyor (6) are equipped with flanges (601). The feed end and the discharge end of the screw conveyor (6) are connected to the discharge pipe (9) and the feed pipe (7) respectively through the flanges (601).

6. A boiler blower feeding device according to claim 5, characterized in that, The feed pipe (7) is connected to the blower branch pipe (3), the axis of the feed pipe (7) is perpendicular to the axis of the blower branch pipe (3), and the axis of the blower branch pipe (3) is perpendicular to the axis of the blower pipe (2).

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