An energy-saving coal particle conveying system based on circulating waste heat air

Abstract

This utility model discloses an energy-saving coal particle conveying system based on circulating waste heat air, relating to the field of coal particle conveying technology. It includes a furnace, a screw conveyor, a motor, a heating tank, and an auger. A preheating mechanism is provided on the side of the furnace, comprising a heating tank, an air duct, and a fan. The heating tank is connected to the side of the air duct, and the air duct is fixedly connected to the top of the fan. This structure integrates waste heat collection with coal particle conveying, shortening the waste heat transmission path and reducing heat loss. Simultaneously, the fan delivers waste heat air to the heating tank through the air duct, forming a directional circulation channel, ensuring that the hot air acts evenly on the coal particle conveying path, improving pre-drying efficiency. A blower is configured in the bottom combustion chamber below the furnace, which can precisely control the amount of combustion air input, allowing for more complete fuel combustion and providing a stable heat source for the waste heat air system.

Description

Technical Field

[0001] This utility model relates to the field of coal particle conveying technology, specifically to an energy-saving coal particle conveying system based on circulating waste heat air. Background Technology

[0002] In traditional coal particle conveying processes, coal particles are typically fed into the furnace using ambient temperature airflow or mechanical conveying. During this process, the coal particles need to absorb a large amount of heat within the furnace to evaporate their moisture, leading to an increase in the furnace's heat load and a decrease in energy utilization efficiency. For example:

[0003] The flue gas waste heat recovery device and process based on circulating dispersed and concentrated solid heat-carrying particles described in application number CN202010097270.4 is mainly for flue gas waste heat recovery. It is not very targeted at the utilization of waste heat in the coal particle transportation process and cannot directly solve the problem of increased furnace heat load and reduced energy utilization caused by moisture evaporation during coal particle transportation. Utility Model Content

[0004] The purpose of this invention is to provide an energy-saving coal particle conveying system based on circulating waste heat air, in order to solve the problem mentioned in the background art that the existing equipment on the market mainly focuses on flue gas waste heat recovery, and is not very targeted at the utilization of waste heat in the coal particle conveying process. It cannot directly solve the problem of increased furnace heat load and reduced energy utilization caused by moisture evaporation during coal particle conveying.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving coal particle conveying system based on circulating waste heat air, comprising a furnace, a screw conveyor, a motor, a heating tank, and an auger;

[0006] A preheating mechanism is provided on the side of the furnace. The preheating mechanism includes a heating tank, an air duct, and a fan. The heating tank is connected to the side of the air duct, and the air duct is fixedly connected to the top of the fan.

[0007] As a preferred technical solution of this utility model, a blower is configured in the bottom combustion chamber below the furnace, and a support structure is provided below the furnace, consisting of six columns and diagonal beams.

[0008] The above technical solution is adopted. A blower is installed in the bottom combustion chamber below the furnace, which can accurately control the amount of combustion air input, so that the fuel can burn more completely and provide a stable heat source for the waste heat air system. In addition, the support structure below the furnace, consisting of six columns and diagonal beams, forms a triangular stable support system that can withstand the high temperature and high pressure load inside the furnace, prevent the equipment from tilting or deforming, and ensure combustion efficiency and equipment stability.

[0009] As a preferred technical solution of this utility model, the left side of the furnace combustion chamber is fixedly connected to the heating tank, the heating tank is generally conical in shape, and a rectangular flange interface structure is configured on the top of the heating tank. The heating tank is made of high temperature resistant material.

[0010] Using the above technical solution, the heating tank is fixedly connected to the left side of the furnace combustion chamber. Its overall structure is conical, with a rectangular flange interface on top, and it is made of high-temperature resistant material. The conical structure can create a converging effect on the waste heat air, increasing the outlet flow rate to enhance the heat exchange efficiency with coal particles. The rectangular flange interface facilitates quick assembly and disassembly with equipment such as screw conveyors, improving maintenance convenience, while the high-temperature resistant material ensures long-term stable operation of the heating tank in high-temperature environments.

[0011] As a preferred technical solution of this utility model, a screw conveyor is fixedly connected to the top of the heating tank by bolts, a motor is fixedly connected to the left side of the screw conveyor, the output shaft of the motor is fixedly connected to the auger, and the auger is rotatably connected to the inside of the screw conveyor. The screw conveyor has a U-shaped cross-section, and a rectangular flange interface is configured on the lower right side of the screw conveyor.

[0012] Using the above technical solution, a screw conveyor is bolted to the top of the heating tank. A motor is connected to the left side of the screw conveyor, and the motor output shaft is fixed to the auger. The auger is rotatably connected to the inside of the screw conveyor, and its cross-section is U-shaped with a rectangular flange interface on the lower right side. The rigid connection between the motor and the auger ensures that the screw conveyor delivers coal particles at a constant speed and in a fixed quantity, avoiding fluctuations in the delivery volume. The U-shaped cross-section reduces coal particle adhesion and residue, and the rectangular flange interface allows for precise docking with the furnace feed inlet, reducing air leakage.

[0013] As a preferred technical solution of this utility model, the heating tank is connected to a ventilation pipe on the left side. The ventilation pipe is made of a high thermal conductivity metal material to absorb the waste heat generated in the furnace. The ventilation pipe has a rectangular structure. A pair of heating tanks are arranged above the ventilation pipe. A fan is fixedly connected below the ventilation pipe.

[0014] Using the above technical solution, the left side of the heating tank is connected to a ventilation duct. The duct is made of a high thermal conductivity metal material to absorb the waste heat of the furnace. It has a rectangular structure and is equipped with a pair of heating tanks on the top. The bottom is fixedly connected to a fan. The high thermal conductivity material and rectangular structure increase the waste heat absorption area and improve the hot air temperature. The pair of heating tanks can be connected in parallel with a preheating unit as needed to flexibly adjust the hot air flow and temperature to adapt to different coal particle moisture content and conveying conditions. The fan ensures that the waste heat air is stably delivered to the heating tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The preheating mechanism set on the side of the furnace includes a heating tank, air duct and fan. The heating tank is connected to the side of the ventilation duct and the air duct is fixedly connected to the top of the fan. This structure integrates waste heat collection and coal particle conveying, shortens the waste heat transmission path and reduces heat loss. At the same time, the fan delivers waste heat air to the heating tank through the air duct, forming a directional circulation channel, so that the hot air acts evenly on the coal particle conveying path and improves the pre-drying efficiency. The bottom combustion chamber below the furnace is equipped with a blower, which can accurately control the amount of combustion air input, so that the fuel burns more completely and provides a stable heat source for the waste heat air system. In addition, the support structure below the furnace, consisting of six columns and diagonal beams, forms a triangular stable support system that can withstand the high temperature and high pressure load inside the furnace, prevent the equipment from tilting or deforming, and ensure combustion efficiency and equipment stability.

[0017] 2. The heating tank is fixedly connected to the left side of the furnace combustion chamber. It has a conical structure with a rectangular flange interface on the top and is made of high-temperature resistant material. The conical structure can form a converging effect on the waste heat air, increase the outlet flow rate to enhance the heat exchange efficiency with coal particles, and the rectangular flange interface facilitates quick disassembly and assembly with equipment such as screw conveyors, improving maintenance convenience. The high-temperature resistant material ensures that the heating tank can work stably for a long time in high-temperature environments.

[0018] 3. A screw conveyor is fixedly connected to the top of the heating tank by bolts. A motor is connected to the left side of the screw conveyor. The motor output shaft is fixed to the auger. The auger is rotatably connected to the inside of the screw conveyor. Its cross-section is U-shaped and a rectangular flange interface is configured on the lower right side. The rigid connection between the motor and the auger ensures that the screw conveyor conveys coal particles at a constant speed and in a quantitative manner, avoiding fluctuations in the conveying volume. The U-shaped cross-section reduces coal particle adhesion and residue. The rectangular flange interface can be precisely connected to the furnace feed port to reduce the air leakage rate.

[0019] 4. The left side of the heating tank is connected to a ventilation duct. The duct is made of high thermal conductivity metal to absorb the waste heat of the furnace. It has a rectangular structure and is equipped with a pair of heating tanks on the top. The bottom is fixedly connected to a fan. The high thermal conductivity material and rectangular structure increase the waste heat absorption area and improve the hot air temperature. The pair of heating tanks can be connected to a preheating unit in parallel as needed to flexibly adjust the hot air flow and temperature to adapt to different coal particle moisture content and conveying conditions. The fan ensures that the waste heat air is stably delivered to the heating tank. Attached Figure Description

[0020] Figure 1 This is a side view of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0022] Figure 3 This is a side view of the heating tank structure of this utility model;

[0023] Figure 4 This is a side view of the cross-sectional structure of the heating tank of this utility model.

[0024] In the diagram: 1. Furnace; 2. Screw conveyor; 3. Motor; 4. Heating tank; 5. Air duct; 6. Fan; 7. Screw conveyor. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-4 The present invention provides a coal particle energy-saving conveying system based on circulating waste heat air, comprising a furnace 1, a screw conveyor 2, a motor 3, a heating tank 4, an air duct 5, a fan 6, and an auger 7.

[0027] A preheating mechanism is installed on the side of the furnace 1. The preheating mechanism includes a heating tank 4, an air duct 5, and a blower 6. The heating tank 4 is connected to the side of the air duct 5, and the air duct 5 is fixedly connected to the top of the blower 6. A blower 6 is installed in the bottom combustion chamber below the furnace 1, and a support structure consisting of six columns and diagonal beams is installed below the furnace 1. The left side of the combustion chamber of the furnace 1 is fixedly connected to the heating tank 4. The heating tank 4 has an overall conical structure, and a rectangular flange interface structure is installed on the top of the heating tank 4. The heating tank 4 is made of high-temperature resistant material. A screw conveyor 2 is fixedly connected to the top of the heating tank 4 by bolts. A motor 3 is fixedly connected to the left side of the screw conveyor 2. The output shaft of the motor 3 is fixedly connected to the auger 7, and the auger 7 is rotatably connected to the inside of the screw conveyor 2. The screw conveyor 2 has a U-shaped cross-section, and a rectangular flange interface is installed on the lower right side of the screw conveyor 2. The left side of the heating tank 4 is connected to the ventilation pipe 5. The ventilation pipe 5 is made of a high thermal conductivity metal material to absorb the waste heat generated by the furnace 1. The ventilation pipe 5 has a rectangular structure. A pair of heating tanks 4 are arranged above the ventilation pipe 5, and the fan 6 is fixedly connected below the ventilation pipe 5.

[0028] Working Principle: When using a coal particle energy-saving conveying system based on circulating waste heat air, motor 3 starts, driving auger 7 to rotate inside screw conveyor 2, conveying coal particles from the storage end towards furnace 1. Simultaneously, the waste heat generated by combustion in furnace 1 is absorbed by air duct 5, and fan 6 delivers the waste heat air through air duct 5 to heating tank 4. The waste heat air in heating tank 4 is ejected at a set flow rate, making full contact with the coal particles detached from the discharge end of screw conveyor 2, heating the coal particles during conveying and evaporating surface and internal moisture. The pre-dried coal particles enter furnace 1 through the rectangular flange interface on the lower right side of screw conveyor 2, reducing the heat required for moisture evaporation during combustion and improving energy utilization.

[0029] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] 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 coal particle energy-saving conveying system based on circulating waste heat air, comprising a furnace (1); characterized in that: A preheating mechanism is provided on the side of the furnace (1). The preheating mechanism includes a heating tank (4), an air duct (5), and a fan (6). The heating tank (4) is connected to the side of the air duct (5), and the air duct (5) is fixedly connected to the top of the fan (6).

2. The coal particle energy-saving conveying system based on circulating waste heat air according to claim 1, characterized in that, The furnace (1) is equipped with a blower in the bottom combustion chamber below it, and a support structure consisting of six columns and a diagonal beam is set below the furnace (1).

3. The coal particle energy-saving conveying system based on circulating waste heat air according to claim 1, characterized in that, The combustion chamber of the furnace (1) is fixedly connected to the heating tank (4) on the left side. The heating tank (4) is a cone-shaped structure and a rectangular flange interface structure is configured on the top of the heating tank (4). The heating tank (4) is made of high temperature resistant material.

4. The coal particle energy-saving conveying system based on circulating waste heat air according to claim 1, characterized in that, The heating tank (4) is fixedly connected to the screw conveyor (2) by bolts. The screw conveyor (2) is fixedly connected to the left side of the motor (3). The output shaft of the motor (3) is fixedly connected to the auger (7), and the auger (7) is rotatably connected to the inside of the screw conveyor (2). The screw conveyor (2) has a U-shaped cross section, and a rectangular flange interface is configured on the lower right side of the screw conveyor (2).

5. The coal particle energy-saving conveying system based on circulating waste heat air according to claim 1, characterized in that, The heating tank (4) is connected to the ventilation pipe (5) on the left side. The ventilation pipe (5) is made of a high thermal conductivity metal material to absorb the residual heat generated by the furnace (1). The ventilation pipe (5) has a rectangular structure. A pair of heating tanks (4) are arranged above the ventilation pipe (5). A fan (6) is fixedly connected below the ventilation pipe (5).

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