Fluidized bed boiler heat supply device

Abstract

The utility model discloses a fluidized bed boiler heat supply device, which belongs to the technical field of fluidized bed boiler heat supply and is characterized in that a discharge port is connected with a boiler body, and a driving device is arranged at one end of a spiral conveying pipe; a preheating conveying pipe and a hot air recycling pipeline are arranged on the side wall of the spiral conveying pipe, a preheating heating device is connected to the preheating conveying pipe, the hot air recycling pipeline is communicated with the preheating heating device, and the hot air input direction of the preheating conveying pipe is opposite to the conveying direction of the spiral conveying pipe. And preheating and heat recovery of materials in the spiral conveying pipe are realized through the preheating conveying pipe and the hot gas recovery pipeline. According to the preheating system, hot air is input into the spiral conveying pipe, preheating treatment on the materials is achieved, the measure aims at improving the initial temperature of the materials before the materials enter the boiler body, and then the combustion efficiency is improved. And the preheated materials are easier to ignite and can be combusted more sufficiently, so that the phenomenon of energy waste caused by incomplete combustion is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized bed boiler heating, and particularly relates to a fluidized bed boiler heating device. Background Technique

[0002] The fluidized bed boiler heating device has become an efficient heat energy supply device with its unique fluidized bed technology. This technology realizes the full mixing and combustion of solid fuel and gas in the fluidized bed, thus ensuring stable heat output. The device is structurally divided into two parts: the boiler body and auxiliary equipment. The boiler body mainly consists of core components such as a start burner, an air chamber, a wind distribution device, a furnace, a gas-solid separator, a material return device, and a steam drum, a downcomer, a water wall, a superheater, etc. The auxiliary equipment includes a forced draft fan, an induced draft fan, a return air fan, a dust collector, a desulfurization and denitration device, etc., and they work together to ensure the stable operation and efficient heating of the boiler.

[0003] In practical applications, it is a common operation to inject low-temperature materials into the boiler through a hoist. When these materials enter the fluidized bed boiler, they need to absorb heat to reach the ignition point and start the combustion process. However, this heat absorption process often causes a temporary drop in the temperature inside the boiler, especially when the amount or speed of material input is large, the temperature drop is more obvious. The decrease in temperature will slow down the combustion reaction rate, thereby affecting the overall thermal efficiency of the boiler.

[0004] In addition, if the low-temperature materials fail to be fully mixed with the high-temperature gas in time, it may cause uneven combustion problems. This uneven combustion will not only reduce the combustion efficiency but also increase boiler emissions such as nitrogen oxides and sulfur oxides, etc., causing negative impacts on the environment.

[0005] More importantly, the addition of low-temperature materials may disrupt the stability of the material fluidization inside the boiler. The fluidized bed boiler needs to maintain a stable material fluidization state to ensure the continuity and stability of the combustion process. However, the introduction of low-temperature materials may disrupt this stability, resulting in fluctuations or instability in the combustion process. Content of the Utility Model

[0006] The main purpose of the utility model is to provide a fluidized bed boiler heating device, which can effectively solve the problems proposed in the background technique.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A fluidized bed boiler heating device includes a support frame, a working platform, a bucket elevator, a feeding device, a gas supply tank, a combustion ignition device, and a boiler body. The working platform, the gas supply tank, and the boiler body are installed on the ground through the support frame, and the combustion ignition device is connected to the gas supply tank and the boiler body;

[0009] The bucket elevator is installed beside the air supply tank. An inlet device is installed at the outlet of the bucket elevator. The inlet device is connected to the boiler body through a spiral conveyor pipe. Feed inlets and discharge outlets are respectively arranged at both ends of the side wall of the spiral conveyor pipe. The feed inlet is connected to the inlet device, and the discharge outlet is connected to the boiler body. A driving device is provided at one end of the spiral conveyor pipe;

[0010] The side wall of the spiral conveyor pipe is provided with a preheating conveyor pipe and a hot gas recovery pipeline. A preheating heating device is connected to the preheating conveyor pipe, and the hot gas recovery pipeline is communicated with the preheating heating device. The direction of the hot gas input through the preheating conveyor pipe is opposite to the material conveying direction of the spiral conveyor pipe. The preheating of the material in the spiral conveyor pipe and the heat recovery are realized through the preheating conveyor pipe and the hot gas recovery pipeline.

[0011] As a further preferred solution of the present application, the driving device is fixed on the spiral conveyor pipe by bolts, and the driving device is mechanically sealed with the spiral conveyor pipe. The output end of the driving device is connected to the screw rod;

[0012] As a further preferred solution of the present application, the feed inlet is connected to the inlet device by bolts, nuts and gaskets. The inlet device is a belt conveyor, and a sealing ring is provided at the connection between the inlet device and the feed inlet;

[0013] As a further preferred solution of the present application, the preheating conveyor pipe and the hot gas recovery pipeline are fixed to the spiral conveyor pipe through flanges and bolts. Filter meshes are provided at the pipe orifices of the preheating conveyor pipe and the hot gas recovery pipeline, and the material is filtered through the filter meshes;

[0014] As a further preferred solution of the present application, a fresh air inlet is provided on the preheating heating device, and the preheating heating device is fixed to the preheating conveyor pipe by bolts;

[0015] As a further preferred solution of the present application, the hot gas recovery pipeline is communicated with the preheating conveyor pipe, a valve is provided at the connection between the two, and a valve is provided on the preheating conveyor pipe.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] In the present utility model, the preheating system realizes the preheating treatment of the material by inputting hot gas into the spiral conveyor pipe. This measure aims to increase the initial temperature of the material before entering the boiler body, thereby improving the combustion efficiency. The preheated material is not only easier to ignite but also can achieve more complete combustion, effectively reducing the energy waste caused by incomplete combustion.

[0018] In addition, the preheating system also ingeniously utilizes the hot gas recovery technology to recover the heat generated during the preheating process and reuse it in the preheating heating device. This technology not only significantly improves the energy utilization efficiency but also remarkably reduces energy consumption, making a positive contribution to the energy conservation and environmental protection performance of the entire heating device.

[0019] Meanwhile, the preheating system has also optimized the structure and driving mode of the spiral feeding pipe to ensure that the material can be evenly heated and stably conveyed during the preheating process. The unique design of the spiral feeding pipe enables the material to fully contact the hot gas, thereby achieving efficient heat exchange. The stable operation of the driving device ensures the continuous and smooth conveyance of the material in the spiral feeding pipe, effectively avoiding the problem of poor preheating effect caused by material blockage or uneven conveyance. Brief Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is a display diagram of the overall structure of the present utility model;

[0022] Figure 3 is a front view of the overall structure of the present utility model;

[0023] Figure 4 is a display diagram of the spiral feeding pipe and the preheating heating device of the present utility model;

[0024] Figure 5 is a display diagram of the spiral feeding pipe, the preheating heating device, and the preheating conveying pipe of the present utility model.

[0025] In the figure: 1, support frame; 2, working platform; 3, bucket elevator; 4, feeding device; 5, gas supply tank; 6, combustion ignition device; 7, boiler body; 8, spiral feeding pipe; 9, feed inlet; 10, discharge outlet; 11, driving device; 12, preheating conveying pipe; 13, hot gas recovery pipeline; 14, preheating heating device. Detailed Embodiment

[0026] To make the technical means, creative features, achieved purposes, and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] As Figure 1 - Figure 5 shown, a fluidized bed boiler heating device mainly consists of core components such as a support frame 1, a working platform 2, a bucket elevator 3, a feeding device 4, a gas supply tank 5, a combustion ignition device 6, and a boiler body 7. These components cooperate together to achieve efficient and stable heating functions.

[0028] First, the support frame 1, as the skeleton of the entire device, is responsible for firmly installing the working platform 2, the gas supply tank 5, and the boiler body 7 on the ground. The working platform 2 provides a convenient working space for the operators, facilitating daily maintenance and repair work.

[0029] The gas supply tank 5, as the core part of the gas supply system, provides a stable gas supply for the combustion ignition device 6. The combustion ignition device 6 is responsible for igniting the gas to generate a high-temperature flame, which then heats the water or other media inside the boiler body 7.

[0030] The bucket elevator 3 is installed beside the gas supply tank 5 and is responsible for lifting materials from a lower place to a higher place. An inlet device 4 is installed at its outlet, and this device adopts a belt conveyor design, which can continuously and stably convey the materials into the spiral feeding pipe 8.

[0031] The spiral feeding pipe 8, as a key component for material transportation, is respectively provided with a feeding port 9 and a discharging port 10 at both ends of its side wall. The feeding port 9 is connected to the inlet device 4 to ensure that the materials can smoothly enter the inside of the spiral feeding pipe 8; while the discharging port 10 is connected to the boiler body 7 to convey the materials into the boiler body 7 for combustion.

[0032] To further improve the heating efficiency, the spiral feeding pipe 8 is also equipped with auxiliary components such as a driving device 11, a preheating conveying pipe 12, and a hot gas recovery pipe 13. The driving device 11 is fixed on the spiral feeding pipe 8 by bolts, providing power for the rotation of the spiral rod, thereby pushing the materials to move forward inside the spiral feeding pipe 8.

[0033] The preheating conveying pipe 12 is connected to a preheating heating device 14, and preheats the materials by inputting hot gas into the spiral feeding pipe 8. The input direction of the hot gas in the preheating conveying pipe 12 is opposite to the material conveying direction of the spiral feeding pipe 8, which helps to preheat the materials more evenly. At the same time, the hot gas recovery pipe 13 recovers the heat generated during the preheating process and conveys it to the preheating heating device 14 for reuse, thus realizing the efficient utilization of energy.

[0034] In addition, the preheating conveying pipe 12 and the hot gas recovery pipe 13 are fixedly connected to the spiral feeding pipe 8 by flanges and bolts, ensuring the sealing performance and stability of the connection. At the same time, components such as filter meshes and valves are also provided on these pipes for filtering materials and regulating the hot gas flow rate.

[0035] Working process: First, before the device starts, the operators carry out various preparatory work on the working platform 2, including checking whether each component is in good condition, whether the connections are tightened, etc. At the same time, the gas supply tank 5 starts to provide a stable gas supply for the combustion ignition device 6 to ensure that it can be quickly ignited when needed;

[0036] Next, the preheating process begins. The preheating heating device 14 is started, and hot air begins to be generated. These hot air is conveyed into the spiral feeding pipe 8 through the preheating conveying pipe 12. Since the input hot air direction of the preheating conveying pipe 12 is opposite to the feeding direction of the spiral feeding pipe 8, the hot air can be in full contact with the material, and the material is uniformly preheated.

[0037] During the preheating process, the driving device 11 is started. Fixed to the spiral feeding pipe 8 by bolts, it starts to provide power for the spiral rod, and the spiral rod rotates to push the material to move forward in the spiral feeding pipe 8. In this way, while the material is being conveyed forward, it continuously exchanges heat with the hot air and gradually heats up to the predetermined temperature.

[0038] At the same time, the hot air recovery pipeline 13 starts to work, recovering the heat generated during the preheating process and conveying it to the preheating heating device 14 for reuse. This step not only improves the energy utilization efficiency but also reduces energy consumption.

[0039] The preheating process continues until the material reaches the preset preheating temperature. At this time, the preheating heating device 14 can reduce its power or stop working, while the material continues to be conveyed forward through the spiral feeding pipe 8 and finally enters the boiler body 7 for combustion.

[0040] During the entire preheating process, the operator can monitor and adjust components such as the preheating heating device 14 and the driving device 11 in real time through the control device on the working platform 2 to ensure the stability and efficiency of the preheating process.

[0041] The standard parts used in this utility model can all be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0042] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent replacements or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A fluidized bed boiler heating device, comprising a support frame (1), a working platform (2), a bucket elevator (3), a feeding device (4), a gas supply tank (5), a combustion ignition device (6) and a boiler body (7), wherein the working platform (2), the gas supply tank (5) and the boiler body (7) are installed on the ground through the support frame (1), and the combustion ignition device (6) is connected to the gas supply tank (5) and the boiler body (7), characterized in that: The bucket elevator (3) is installed next to the gas supply tank (5). A feeding device (4) is installed at the outlet of the bucket elevator (3). The feeding device (4) is connected to the boiler body (7) through a spiral feeding pipe (8). A feeding port (9) and a discharging port (10) are respectively provided at both ends of the side wall of the spiral feeding pipe (8). The feeding port (9) is connected to the feeding device (4), and the discharging port (10) is connected to the boiler body (7). A driving device (11) is provided at one end of the spiral feeding pipe (8); A preheating conveying pipe (12) and a hot gas recovery pipe (13) are provided on the side wall of the spiral conveying pipe (8); a preheating heating device (14) is connected to the preheating conveying pipe (12); the hot gas recovery pipe (13) is in communication with the preheating heating device (14); the hot gas input direction of the preheating conveying pipe (12) is opposite to the material feeding direction of the spiral conveying pipe (8); and preheating and heat recovery of materials in the spiral conveying pipe (8) are achieved through the preheating conveying pipe (12) and the hot gas recovery pipe (13).

2. A fluidized bed boiler heating device according to claim 1, characterized in that: The driving device (11) is fixed to the spiral material conveying pipe (8) by means of bolts, and the driving device (11) and the spiral material conveying pipe (8) are mechanically sealed, and the output end of the driving device (11) is connected to the spiral rod.

3. A fluidized bed boiler heating device according to claim 2, characterized in that: The feed port (9) is connected to the feed device (4) via bolts, nuts and gaskets; the feed device (4) is a belt conveyor; a sealing ring is provided at the connection between the feed device (4) and the feed port (9).

4. A fluidized bed boiler heating device according to claim 3, characterized in that: The preheating conveying pipe (12), the hot gas recovery pipe (13) and the spiral conveying pipe (8) are fixed by flanges and bolts. Filters are provided at the pipe openings of the preheating conveying pipe (12) and the hot gas recovery pipe (13), and the materials are filtered through the filter.

5. The fluidized bed boiler heating device according to claim 4, characterized in that: The preheating device (14) is provided with a fresh air inlet, and the preheating device (14) is fixed to the preheating delivery pipe (12) by means of bolts.

6. A fluidized bed boiler heating device according to claim 5, characterized in that: The hot gas recovery pipeline (13) is in communication with the preheating delivery pipe (12), a valve is provided at the connection between the two, and a valve is provided on the preheating delivery pipe (12).

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