Pulverized coal pipeline heating device for pulverized coal boiler
By designing a heating device in the pulverized coal boiler, the temperature of the pulverized coal gas flow can be increased by electric heating or steam heating, which solves the problem of insufficient temperature in the pulverized coal feeding pipeline, improves the ignition and stable combustion characteristics of the pulverized coal boiler, and enhances combustion efficiency and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-03-10
AI Technical Summary
Insufficient temperature of the air-coal mixture in the pulverized coal feeding pipe leads to reduced boiler efficiency and unstable combustion.
Design a pulverized coal pipeline heating device for pulverized coal boilers, including heating components and insulation devices. It adopts electric heating or steam heating methods, increases the temperature of pulverized coal gas flow through the heating components, and regulates the temperature through the temperature control device to adapt to the complex structure of the pipeline.
It effectively increases the temperature of pulverized coal airflow, improves ignition and combustion stability, and enhances the combustion efficiency and stability of the boiler.
Smart Images
Figure CN223985191U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of electric power industry, especially relates to a coal powder pipeline heating device for coal powder boiler. BACKGROUND
[0002] In the coal powder boiler, the temperature of the coal powder gas flow is important for the ignition of the coal powder gas flow. Higher coal powder gas flow temperature can reduce the ignition temperature of the coal powder gas flow and improve the combustion efficiency of the coal powder. This is crucial for the stable combustion characteristics and combustion efficiency of the boiler that burns coal with low volatile matter (Vdaf). However, the temperature of the wind-powder mixture in the powder conveying pipeline is often insufficient, which reduces the efficiency of the boiler and affects the stability of the boiler combustion. SUMMARY
[0003] In view of the problem that the temperature of the wind-powder mixture in the powder conveying pipeline is often insufficient, a coal powder pipeline heating device for a coal powder boiler is proposed.
[0004] The technical scheme of the utility model is as follows: a coal powder pipeline heating device for a coal powder boiler, comprising a coal powder pipeline, a heating assembly, and a heat preservation device; the heating assembly is arranged outside the coal powder pipeline, the heat preservation device is arranged outside the coal powder pipeline and the heating assembly, and the heating assembly is an electric heating assembly or a steam heating assembly.
[0005] Preferably, the device further comprises a temperature control device that outputs a power adjustment control signal to the heating assembly.
[0006] Preferably, the heating assembly is arranged continuously or in segments.
[0007] Preferably, the heating assembly comprises a heater outer cylinder and a guide vane, the heater outer cylinder is sleeved outside the coal powder pipeline, and the guide vane is arranged between the heater outer cylinder and the coal powder pipeline.
[0008] Preferably, the guide vanes are uniformly and spirally sleeved on the outer surface of the coal powder pipeline.
[0009] Preferably, the heating assembly is provided with a steam inlet at one end of the bottom and a steam outlet at the other end.
[0010] According to another aspect of the present disclosure, a coal powder boiler comprises a boiler body, a coal mill, a coal powder pipeline, and the heating device described above.
[0011] The utility model has the advantages that in the boiler design, the temperature of the coal powder gas flow at the inlet of the coal powder pipeline can be controlled at 120-130 DEG C; the temperature of the coal powder gas flow is further increased by the heating device, and the temperature increase is between 10-100 DEG C; the heating device increases the temperature of the coal powder gas flow, reduces the ignition temperature of the coal powder gas flow, and improves the ignition conditions of the coal powder gas flow, thereby effectively improving the ignition and stable combustion characteristics of the coal powder boiler. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of the heating component of the pulverized coal pipeline heating device for pulverized coal boiler of this utility model, which is electrically heated;
[0013] Figure 2 This is a schematic diagram of the heating component of the pulverized coal pipeline heating device for pulverized coal boilers of this utility model, which is steam-heated.
[0014] The component names corresponding to the various reference numerals in the diagram are as follows:
[0015] 1. Pulverized coal pipeline; 2. Heating assembly; 21. Heater outer cylinder; 22. Guide vane; 23. Steam inlet; 24. Steam outlet; 3. Temperature control device; 4. Insulation device. Detailed Implementation
[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.
[0017] refer to Figure 1 , 2 As shown, the present invention provides a pulverized coal pipeline heating device for a pulverized coal boiler, including a pulverized coal pipeline 1, a heating component 2, a temperature control device 3, and a heat preservation device 4; the heating component 2 is located on the outside of the pulverized coal pipeline 1, transferring heat to the pulverized coal airflow without contacting the pulverized coal airflow, thus preventing the pulverized coal airflow from scouring the heating device and causing wear and damage to the heating device; the heat preservation device 4 is provided on the outside of the pulverized coal pipeline 1 and the heating component 2 to prevent heat dissipation to the environment;
[0018] The temperature control device 3 outputs a control signal to the heating component 2, and adjusts the power of the heating component 2 through the temperature control device 3 to control the rise of the pulverized coal airflow;
[0019] Heating component 2 can be heated by electricity, steam, or other heat sources. Because the pulverized coal pipeline has bends and branches, heating component 2 can be divided into several sections and arranged separately or in sections.
[0020] The heating assembly 2 includes a heater outer cylinder 21, guide vanes 22, a steam inlet 23, and a steam outlet 24;
[0021] The heater outer cylinder 21 is sleeved outside the pulverized coal pipeline 1, and the heater outer cylinder 21 and the pulverized coal pipeline 1 are provided with guide vanes 22, the guide vanes 22 are uniformly and spirally sleeved outside the outer surface of the pulverized coal pipeline 1, and the guide vanes 22 form a steam flow channel;
[0022] The beneficial effect is that in the boiler design, the temperature of the pulverized coal gas flow at the inlet of the pulverized coal pipeline can be controlled at 120-130 DEG C; the temperature of the pulverized coal gas flow is further increased by the heating device, and the temperature increase range is 10-100 DEG C; the heating device increases the temperature of the pulverized coal gas flow, reduces the ignition heat of the pulverized coal gas flow, and improves the ignition condition of the pulverized coal gas flow, thereby effectively improving the ignition and stable combustion characteristics of the pulverized coal boiler.
[0023] It should be noted that the above terms "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The meaning of "a plurality of" is two or more. "Mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected.
[0024] The above is only a preferred embodiment of the present application, and is not any form or substantial limitation on the present application. It should be noted that for ordinary skilled persons in the art, without departing from the present application, a number of improvements and supplements can be made, which should be considered as the protection range of the present application. For those skilled in the art, without departing from the spirit and scope of the present application, some changes, modifications and equivalent changes of the above disclosed technical content can be made, which are equivalent embodiments of the present application; at the same time, any equivalent change, modification and evolution of the above-mentioned embodiments according to the essential technology of the present application are still within the scope of the technical scheme of the present application.
Claims
1. A pulverized coal pipeline heating device for a pulverized coal boiler, characterized in that, The heating device comprises a pulverized coal pipeline (1), a heating assembly (2), and a heat preservation device (4); the heating assembly (2) is arranged outside the pulverized coal pipeline (1); the heat preservation device (4) is arranged outside the pulverized coal pipeline (1) and the heating assembly (2); the heating assembly (2) is an electric heating assembly or a steam heating assembly; The heating assembly (2) comprises a heater outer cylinder (21) and a guide vane (22); the heater outer cylinder (21) is sleeved outside the pulverized coal pipeline (1); the guide vane (22) is arranged between the heater outer cylinder (21) and the pulverized coal pipeline (1).
2. The pulverized coal pipeline heating device for a pulverized coal boiler according to claim 1, characterized by The heating device further comprises a temperature control device (3); the temperature control device (3) outputs a power adjustment control signal to the heating assembly (2).
3. The pulverized coal pipeline heating device for a pulverized coal boiler according to claim 1, characterized by The heating assembly (2) is arranged continuously or in sections.
4. The pulverized coal pipeline heating device for a pulverized coal boiler according to claim 1, characterized by The guide vanes (22) are uniformly and spirally sleeved on the outer surface of the pulverized coal pipeline (1).
5. The pulverized coal pipeline heating device for a pulverized coal boiler according to claim 4, characterized by The bottom end of the heating assembly (2) is provided with a steam inlet (23), and the other end is provided with a steam outlet (24).
6. A pulverized coal boiler comprising a boiler body, a coal mill, a pulverized coal conduit (1), characterized in that, The heating device comprises the heating device according to any one of claims 1-5.