Double-air-distribution-plate type boiler

Abstract

The utility model relates to a double-air-distribution-plate type boiler. The double-air-distribution-plate type boiler comprises a hearth main body, a first air chamber and a second air chamber. The double-air-chamber design is adopted, so that fluidizing air (primary air) can enter the first air chamber and the second air chamber respectively, slag can be fully cooled before being discharged through the double-air-chamber cooling slag discharging system design, the slag discharging system is prevented from being damaged by high-temperature ash, the service life of the slag discharging system is prolonged, and meanwhile the slag discharging system is convenient to operate. Cooling air enters the hearth after being heated to improve boiler efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fluidized bed boiler technology, specifically a double air distribution plate boiler. Background Technology

[0002] Fluidized bed boilers, as a highly efficient and environmentally friendly thermal energy conversion device, have been widely used in various fields such as power, chemical industry, and metallurgy. Their core working principle lies in using fluidizing air to make the solid particles within the bed present a fluid-like state, thereby achieving uniform mixing and efficient combustion of solid fuels.

[0003] In existing fluidized bed boiler technology, the ash removal system is a crucial component. The performance of the ash removal system directly affects the boiler's continuous operation, combustion efficiency, and comprehensive utilization of ash. Traditional fluidized bed boiler ash removal systems often suffer from low ash removal efficiency, insufficient ash cooling, and susceptibility to clogging. This not only affects the overall performance of the boiler but also increases operating and maintenance costs.

[0004] Therefore, a novel fluidized bed boiler structure is designed to improve ash removal efficiency, enhance ash cooling effect, reduce clogging, and ensure stable boiler operation. Summary of the Invention

[0005] To address the problems of the prior art, this utility model provides a double-air distribution plate boiler.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a double air distribution plate boiler, including a furnace body, a first air chamber and a second air chamber, wherein the furnace body, the first air chamber and the second air chamber are an integral vertically distributed structure, the furnace body is located at the top of the first air chamber, the first air chamber is located at the top of the second air chamber, a first air distribution plate is fixedly connected to the bottom of the interior of the furnace body, and a second air distribution plate is fixedly connected to the top of the inner wall of the second air chamber.

[0007] In some specific embodiments, a first primary air duct is fixedly connected to one side of the first air chamber, and the first primary air duct is used to supply air to the interior of the first air chamber.

[0008] In some specific embodiments, a second primary air duct is fixedly connected to one side of the second air chamber, and the second primary air duct is used to supply air to the interior of the second air chamber.

[0009] In some specific implementations, control valves are provided at the output ends of the first primary air duct and the second primary air duct to control the on / off state and flow rate of the output airflow.

[0010] In some specific embodiments, a second slag discharge valve is fixedly connected to one side of the bottom end of the furnace body for cleaning the slag at the first air distribution plate, and a first slag discharge valve is fixedly connected to one side of the bottom end of the first air chamber for cleaning the slag at the second air distribution plate.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. This utility model adopts a dual-chamber design, which allows the fluidizing air to enter the first and second chambers separately. The dual-chamber cooling slag discharge system design allows the slag to be fully cooled before discharge, avoiding damage to the slag discharge system caused by high-temperature ash and extending the service life of the slag discharge system. At the same time, the cooling air is heated before entering the furnace, improving boiler efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0015] Figure 1-2 In the middle: 1. Furnace body; 2. First air chamber; 3. Second air chamber; 4. First primary air duct; 5. Second primary air duct; 6. First slag discharge valve; 7. Second slag discharge valve; 21. First air distribution plate; 31. Second air distribution plate. Detailed Implementation

[0016] 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.

[0017] like Figure 1-2 The boiler shown includes a furnace body 1, a first air chamber 2 and a second air chamber 3. The furnace body 1, the first air chamber 2 and the second air chamber 3 are an integral vertically distributed structure. The furnace body 1 is located at the top of the first air chamber 2 and the first air chamber 2 is located at the top of the second air chamber 3. A first air distribution plate 21 is fixedly connected to the bottom of the interior of the furnace body 1 and a second air distribution plate 31 is fixedly connected to the top of the inner wall of the second air chamber 3.

[0018] A first primary air duct 4 is fixedly connected to one side of the first air chamber 2, and the first primary air duct 4 is used to supply air to the interior of the first air chamber 2. A second primary air duct 5 is fixedly connected to one side of the second air chamber 3, and the second primary air duct 5 is used to supply air to the interior of the second air chamber 3. Control valves are installed at the output ends of the first primary air duct 4 and the second primary air duct 5 to control the on / off state and flow rate of the output airflow. A second slag discharge valve 7 is fixedly connected to one side of the bottom of the furnace body 1, and is used to clean the slag at the first air distribution plate 21. A first slag discharge valve 6 is fixedly connected to one side of the bottom of the first air chamber 2, and is used to clean the slag at the second air distribution plate 31.

[0019] During operation, the primary air duct 4 and the secondary primary air duct 5 are responsible for providing the necessary fluidizing air to the entire system. The secondary primary air duct 5 is fixedly connected to the second air chamber 3, and the primary primary air duct 4 is fixedly connected to the first air chamber 2. This design allows the fluidizing air to enter the two air chambers separately, thereby achieving different fluidization effects on the materials inside the furnace.

[0020] After the fluidizing air enters the air chamber, it is evenly distributed onto the material in the furnace through the air distribution plate. The design of the first air distribution plate 21 and the second air distribution plate 31 ensures the uniformity and stability of the fluidizing air, so that the material can be fully fluidized and mixed.

[0021] Inside the main furnace chamber 1, the material, under the action of fluidizing air, exhibits a fluid-like state, achieving uniform mixing and efficient combustion. The heat generated by combustion is transferred to the external medium through the furnace wall, realizing the conversion and utilization of thermal energy.

[0022] As combustion proceeds, a certain amount of slag will be generated in the main furnace 1 and the first air chamber 2. When the slag accumulates to a certain extent, it needs to be cleaned to ensure the normal operation of the boiler.

[0023] By operating the first slag discharge valve 6, the slag on the second air distribution plate 31 can be discharged. Since the first air chamber 2 is located above the second air chamber 3, its slag may contain some incompletely burned material. During the slag discharge process, it is necessary to carefully control the opening of the slag discharge valve to avoid a large amount of unburned material being discharged with the slag.

[0024] The second slag discharge valve 7 at the bottom of the furnace body 1 is used to discharge the slag on the first air distribution plate 21. This slag mainly consists of ash from combustion and a small amount of unburned material. Before slag discharge, the content of unburned material can be reduced by adjusting the fluidizing air volume and combustion conditions.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-air-distribution plate boiler, comprising a furnace body (1), a first air chamber (2) and a second air chamber (3), characterized in that: The furnace body (1), the first air chamber (2) and the second air chamber (3) are an integrated vertically distributed structure. The furnace body (1) is located at the top of the first air chamber (2), and the first air chamber (2) is located at the top of the second air chamber (3). The bottom of the furnace body (1) is fixedly connected to the first air distribution plate (21), and the top of the inner wall of the second air chamber (3) is fixedly connected to the second air distribution plate (31).

2. The double-air-distribution plate boiler according to claim 1, characterized in that: A first primary air duct (4) is fixedly connected to one side of the first air chamber (2), and the first primary air duct (4) is used to supply air to the inside of the first air chamber (2); A second primary air duct (5) is fixedly connected to one side of the second air chamber (3), and the second primary air duct (5) is used to supply air to the interior of the second air chamber (3).

3. A double-air-distribution plate boiler according to claim 2, characterized in that: The output ends of the first primary air duct (4) and the second primary air duct (5) are equipped with control valves to control the on / off state and flow rate of the output airflow.

4. A double-air-distribution plate boiler according to claim 1, characterized in that: A second slag discharge valve (7) is fixedly connected to one side of the bottom end of the furnace body (1) for cleaning the slag at the first air distribution plate (21). A first slag discharge valve (6) is fixedly connected to one side of the bottom end of the first air chamber (2) for cleaning the slag at the second air distribution plate (31).

Images