Coal feeding and spreading box for improving burnout rate of pulverized coal

Abstract

The utility model discloses a kind of coal feeding and spreading box of improving coal dust burnout rate, comprising: coal spreading box, the inside of the coal spreading box is equipped with cyclone separator, and the lower end of cyclone separator is equipped with discharging pipe, the lower end of the discharging pipe is equipped with flap valve, the upper end of the cyclone separator is fixedly connected with fine powder pipe, the lower end of the fine powder pipe is threadedly connected with sealing interface, the lower end of the sealing interface is equipped with powder spraying pump, and the output end of the powder spraying pump is provided with spray outlet;Coal spreading box is combined with cyclone separator together, can effectively utilize cyclone separator to finely separate and process coal dust, to further improve the uniformity of coal spreading, four groups of powder spraying pump and spray outlet are set on the outside of coal spreading box, they carry out coal spreading operation from four different directions, and this multi-directional coal spreading mode improves the uniformity of coal dust spreading, by separating coal dust coarsely, not only optimize combustion process, but also effectively improve the burnout rate of coal dust.

Description

Technical Field

[0001] This utility model relates to the field of pulverized coal spreading technology, specifically a coal feeding and spreading box for improving the pulverized coal combustion rate. Background Technology

[0002] Pulverized coal is an important fuel in the calcination of raw materials because it is easier to burn, has higher combustion efficiency, and reduces resource waste. Pulverized coal needs to be fed into the furnace for combustion through a coal feeding system. The coal feeding box is one of the important devices in the coal feeding system.

[0003] Currently, common coal feeding boxes on the market generally have a significant drawback in the process of spreading pulverized coal: they lack the function of secondary processing of pulverized coal. This design deficiency means that when spreading pulverized coal, it is impossible to further refine the pulverized coal that has already entered the feeding box. As a result, coarse and fine particles in the pulverized coal are often spread out together. This not only makes the pulverized coal prone to clumping, but also negatively affects the combustion rate of the pulverized coal due to uneven particle size. Ultimately, this uneven pulverized coal spreading method leads to a decrease in the combustion efficiency of the pulverized coal, making it impossible to achieve complete combustion.

[0004] Therefore, those skilled in the art have provided a coal feeding and spreading box to improve the pulverized coal combustion rate, in order to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide a coal feeding and spreading box that improves the pulverized coal combustion rate, thereby solving the problem mentioned in the background art that the existing coal feeding and spreading boxes lack secondary processing functions, resulting in poor separation of coarse and fine pulverized coal and reduced pulverized coal combustion rate.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A coal feeding and spreading box for improving the combustion rate of pulverized coal includes: a coal spreading box, a cyclone separator installed inside the coal spreading box, a feed pipe installed at the lower end of the cyclone separator, a flap valve installed at the lower end of the feed pipe, a fine powder pipe fixedly connected to the upper end of the cyclone separator, a sealing interface threadedly connected to the lower end of the fine powder pipe, a powder injection pump installed at the lower end of the sealing interface, and a spray outlet provided at the output end of the powder injection pump.

[0008] As a further improvement of this utility model: the bottom of the flap valve is rotatably connected to an opening and closing valve plate, and the flap valve is internally connected to the feed pipe.

[0009] As a further improvement of this utility model: hydraulic cylinders are rotatably connected to the left and right sides of the flap valve, and an upper connecting shaft is provided between the upper end of the hydraulic cylinder and the flap valve.

[0010] As a further embodiment of this utility model: a lower connecting shaft is provided between the output end of the hydraulic cylinder and the opening / closing valve plate, a rotating shaft is provided between the opening / closing valve plate and the flap valve, the hydraulic cylinder forms a rotating structure with the opening / closing valve plate through the lower connecting shaft, and the hydraulic cylinder forms a rotating connection with the flap valve through the upper connecting shaft.

[0011] As a further embodiment of this utility model: the fine powder tube is connected to the silo through a sealed interface, and the silo is connected to the spray outlet through a powder spraying pump.

[0012] As a further improvement of this utility model: the number of fine powder tubes corresponds one-to-one with the number of powder spraying pumps, and the fine powder tubes and powder spraying pumps are distributed in a cross shape about the symmetrical center line of the cyclone separator.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By combining a coal spreading box with a cyclone separator, the cyclone separator can be effectively used for fine separation of coal powder. During this process, fine coal particles move upwards with the airflow and are separated through the fine powder pipe, while coarser particles are affected by gravity and fall downwards into the feed pipe. This completes the secondary processing and separation of the coal powder. A hopper is installed at the lower end of the fine powder pipe, and a powder injection pump is equipped at the bottom of the hopper. The function of the powder injection pump is to spray fine powder from the nozzle, using compressed air to mix with the powder... The mixture forms a gas-solid two-phase flow. This design utilizes the kinetic energy of the gas to overcome the gravity, friction, and other resistances of the powder, ensuring that the fine powder can be effectively sprayed out. To further improve the uniformity of coal spreading, four sets of powder injection pumps and nozzles are installed on the outside of the coal spreading box. They spread coal from four different directions. This multi-directional coal spreading method significantly improves the uniformity of coal powder spreading. By separating the coal powder into coarse and fine particles, not only is the combustion process optimized, but the burnout rate of the coal powder is also effectively improved, thereby enhancing the overall combustion efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a coal feeding and spreading box for improving the combustion rate of pulverized coal.

[0016] Figure 2 This is a schematic diagram of a coal feeding and spreading box, a pulverized coal injection pump, and an injection outlet structure for improving the pulverized coal combustion rate.

[0017] Figure 3This is a schematic diagram of the flap valve in a coal feeding and spreading box for improving the combustion rate of pulverized coal.

[0018] Figure 4 This is a second-view structural schematic diagram of a flap valve in a coal feeding and spreading box for improving the combustion rate of pulverized coal.

[0019] In the diagram: 1. Coal spreading box; 2. Feeding pipe; 3. Cyclone separator; 4. Fine powder pipe; 5. Sealing interface; 6. Flip valve; 7. Hopper; 8. Powder injection pump; 9. Spray outlet; 10. Hydraulic cylinder; 11. Upper connecting shaft; 12. Opening and closing valve plate; 13. Rotating shaft; 14. Lower connecting shaft. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 This utility model provides a coal feeding and spreading box for improving the combustion rate of pulverized coal, including: a coal spreading box 1, a cyclone separator 3 installed inside the coal spreading box 1, a feeding pipe 2 installed at the lower end of the cyclone separator 3, a flap valve 6 installed at the lower end of the feeding pipe 2, a fine powder pipe 4 fixedly connected to the upper end of the cyclone separator 3, a sealing interface 5 threadedly connected to the lower end of the fine powder pipe 4, a powder injection pump 8 installed at the lower end of the sealing interface 5, a spray outlet 9 provided at the output end of the powder injection pump 8, the fine powder pipe 4 being interconnected with the hopper 7 through the sealing interface 5, and the hopper 7 being connected to the spray outlet 9 through the powder injection pump 8, the number of fine powder pipes 4 corresponding one-to-one with the number of powder injection pumps 8, and the fine powder pipes 4 and the powder injection pump 8 being distributed in a cross shape about the symmetrical center line of the cyclone separator 3;

[0022] Specifically, the cyclone separator 3 is integrated with the feeding box. Through the operation of the cyclone separator 3, coarse particles in the coal powder are separated and fall downwards under gravity, while finer coal powder particles move upwards with the airflow and enter the fine powder pipe 4. The bottom of the fine powder pipe 4 is connected to the hopper 7 through a sealing interface 5, ensuring the airtightness of the entire fine powder pipe 4. The hopper 7 itself is tightly connected to the powder injection pump 8. When the fine powder falls from the fine powder pipe 4 into the hopper 7, the powder injection pump 8 is immediately activated, spraying the fine powder in the hopper 7 through the injection outlet 9. The working principle of the powder injection pump 8 is to use the mixing of compressed air and powder to form a gas-solid two-phase flow. The power of this fluid is sufficient to overcome the gravity, friction and other resistance of the powder, thereby achieving the effect of spraying the coal powder from the injection outlet 9. In order to further improve the uniformity of spreading, four sets of powder injection pumps 8 and injection outlets 9 are set on the outside of the coal spreading box 1. They work together from four different directions. This multi-directional coal spreading method significantly improves the uniformity of coal powder spreading and ensures the uniform distribution of coal powder in the target area.

[0023] The bottom of the flap valve 6 is rotatably connected to the opening and closing valve plate 12. The flap valve 6 is internally connected to the discharge pipe 2. The left and right sides of the flap valve 6 are rotatably connected to the hydraulic cylinders 10. The upper end of the hydraulic cylinder 10 is connected to the flap valve 6 via an upper connecting shaft 11. The output end of the hydraulic cylinder 10 is connected to the opening and closing valve plate 12 via a lower connecting shaft 14. The opening and closing valve plate 12 is connected to the flap valve 6 via a rotating shaft 13. The hydraulic cylinder 10 forms a rotating structure with the opening and closing valve plate 12 via the lower connecting shaft 14. The hydraulic cylinder 10 forms a rotating connection with the flap valve 6 via the upper connecting shaft 11.

[0024] Specifically, a flap valve 6 is installed at the lower end of the feed pipe 2. The bottom of the flap valve 6 is designed with an opening and closing valve plate 12. The function of the opening and closing valve plate 12 is to spread the separated coarse powder. It works closely with the powder spraying pump 8 and the spray outlet 9 to complete the spreading work. The feed pipe 2 is responsible for spreading the powder from the middle part, while the spray outlet 9 is responsible for spreading the powder from all sides. In order to realize this spreading process, a hydraulic cylinder 10 is used to drive the rotation of the opening and closing valve plate 12. The opening and closing valve plate 12 is connected to the flap valve 6 through a rotating shaft 13 to form a rotating structure. This design allows the opening and closing valve plate 12 to easily open and close under the drive of the hydraulic cylinder 10, thereby effectively controlling the spreading process.

[0025] The working principle of this utility model is as follows:

[0026] When using this invention, firstly, pulverized coal enters the cyclone separator 3 through the coal spreading box 1. Inside the cyclone separator 3, the pulverized coal is acted upon by the airflow. Coarse particles, due to their larger mass, will settle downwards under gravity and enter the flap valve 6 through the feed pipe 2, while finer pulverized coal particles rise with the airflow and enter the fine powder pipe 4. At the flap valve 6, the coarse pulverized coal particles are spread out under the control of the opening and closing valve plate 12, driven by the hydraulic cylinder 10, thus achieving the spreading of the middle part. At the same time, the fine pulverized coal in the fine powder pipe 4 enters the silo 7 through the sealed interface 5. The fine pulverized coal in the silo 7 is drawn by the powder injection pump 8 and sprayed out from all sides in the form of a gas-solid two-phase flow through the spray outlet 9, cooperating with the coarse pulverized coal particles spread in the middle to form a uniform spreading in all directions. This design not only improves the combustion rate of pulverized coal but also ensures the uniformity and efficiency of coal spreading.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A coal feeding and spreading box for improving the combustion rate of pulverized coal, characterized in that, include: A coal spreading box (1) is provided with a cyclone separator (3) installed inside the coal spreading box (1). A feed pipe (2) is installed at the lower end of the cyclone separator (3). A flap valve (6) is installed at the lower end of the feed pipe (2). A fine powder pipe (4) is fixedly connected to the upper end of the cyclone separator (3). A sealing interface (5) is threaded to the lower end of the fine powder pipe (4). A powder injection pump (8) is installed at the lower end of the sealing interface (5). An outlet (9) is provided at the output end of the powder injection pump (8).

2. The coal feeding and spreading box for improving the combustion rate of pulverized coal according to claim 1, characterized in that, The bottom of the flap valve (6) is rotatably connected to an opening and closing valve plate (12), and the flap valve (6) is internally connected to the feed pipe (2).

3. The coal feeding and spreading box for improving the combustion rate of pulverized coal according to claim 1, characterized in that, The flap valve (6) is rotatably connected to hydraulic cylinders (10) on both sides, and an upper connecting shaft (11) is provided between the upper end of the hydraulic cylinder (10) and the flap valve (6).

4. A coal feeding and spreading box for improving the combustion rate of pulverized coal according to claim 3, characterized in that, A lower connecting shaft (14) is provided between the output end of the hydraulic cylinder (10) and the opening and closing valve plate (12). A rotating shaft (13) is provided between the opening and closing valve plate (12) and the flap valve (6). The hydraulic cylinder (10) forms a rotating structure with the opening and closing valve plate (12) through the lower connecting shaft (14). The hydraulic cylinder (10) forms a rotating connection with the flap valve (6) through the upper connecting shaft (11).

5. A coal feeding and spreading box for improving the combustion rate of pulverized coal according to claim 1, characterized in that, The fine powder tube (4) is connected to the hopper (7) through a sealed interface (5), and the hopper (7) is connected to the spray outlet (9) through a powder spraying pump (8).

6. A coal feeding and spreading box for improving the combustion rate of pulverized coal according to claim 1, characterized in that, The number of fine powder tubes (4) corresponds one-to-one with the number of powder spraying pumps (8), and the fine powder tubes (4) and powder spraying pumps (8) are arranged in a cross shape about the symmetrical center line of the cyclone separator (3).

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