Drying furnace exhaust chamber heating system using horizontal flue gas

Abstract

The utility model belongs to the technical field of heating, and particularly relates to a system for heating an exhaust chamber of a drying furnace by using horizontal flue gas, which comprises a primary air pipe, one end of the primary air pipe is mounted at an input port of an air chamber at the lower part of a second combustion furnace grate, and one end of a primary air branch pipe III is welded on the side wall of the primary air pipe in a penetrating manner; the other end of the third primary air branch pipe is installed at an input port of an air chamber on the lower portion of the second drying fire grate, one end of the first primary air branch pipe is welded to the side wall of the primary air pipe in a penetrating mode, and the other end of the first primary air branch pipe is installed at an input port of an air chamber on the lower portion of the first combustion fire grate. One end of a second primary air branch pipe is welded to the side wall of the first primary air branch pipe in a penetrating mode. According to the system, high-temperature flue gas in the horizontal flue is extracted through the centrifugal fan, the high-temperature flue gas is mixed with primary air after being dedusted through the cyclone separator, flue gas waste heat directly discharged originally is directly recycled and converted into a heat source of a drying fire grate system, and extra energy consumption needed by primary air heating is greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the field of heating technology, specifically referring to a horizontal flue gas heating system for the exhaust chamber of a drying furnace. Background Technology

[0002] In waste incineration systems, primary air, as the airflow directly fed into the furnace to participate in the initial combustion of fuel, plays a crucial role in drying fuel, transporting it, and providing the oxygen needed for the initial stages of combustion. Primary air is typically supplied by a blower and transported through ducts to the air chamber below the grate, from where it is evenly distributed throughout the incinerator. However, in actual operation, the temperature of the primary air inevitably decreases due to the long duct path it traverses during transport.

[0003] This temperature drop has a significant adverse impact on the waste incineration process. First, during the waste drying stage, the temperature of the primary air directly affects the evaporation rate of moisture in the waste. When the primary air temperature decreases, it carries less heat, leading to a slower drying speed and poorer drying efficiency. Insufficiently dried waste entering the incinerator will further absorb heat generated during combustion to evaporate moisture, thus lowering the effective combustion temperature within the incinerator.

[0004] The decrease in incineration temperature not only affects the combustion efficiency of waste but also leads to a loss of calorific value. When waste burns at low temperatures, the organic matter inside cannot be fully decomposed, resulting in incomplete combustion and reduced heat release. This not only increases the generation of unburned materials but also reduces the overall thermal efficiency of the incineration system. Utility Model Content

[0005] To address the aforementioned problems, this invention proposes a horizontal flue gas heating system for the exhaust chamber of a drying furnace.

[0006] The technical solution adopted by this utility model is as follows: This utility model provides a horizontal flue gas heating system for a drying grate air chamber, including a primary air duct. One end of the primary air duct is installed at the inlet of the lower air chamber of the second combustion grate. One end of a primary air branch pipe three is welded through the side wall of the primary air duct. The other end of the primary air branch pipe three is installed at the inlet of the lower air chamber of the second drying grate. One end of a primary air branch pipe one is welded through the side wall of the primary air duct. The other end of the primary air branch pipe one is installed at the inlet of the lower air chamber of the first combustion grate. One end of a primary air branch pipe two is welded through the side wall of the primary air branch pipe one. The other end of the primary air branch pipe two is installed at the inlet of the lower air chamber of the first drying grate. The system also includes a heating component.

[0007] Furthermore, the heating assembly includes a primary superheater ash hopper, the input end of a cyclone separator is connected through the side wall of the primary superheater ash hopper, one end of a conveying pipe is installed at the output end of the cyclone separator, the other end of the conveying pipe is welded through to the side wall of the second primary air branch pipe, a centrifugal fan is installed on the conveying pipe, one end of a first hot air branch pipe is welded through the side wall of the conveying pipe, the other end of the first hot air branch pipe is welded through to the side wall of the first primary air branch pipe, one end of a second hot air branch pipe is connected through the side wall of the second hot air branch pipe, the other end of the second hot air branch pipe is welded through to the side wall of the third primary air branch pipe, and the other end of the third hot air branch pipe is welded through to the side wall of the primary air duct.

[0008] Furthermore, the cyclone separator is located between the centrifugal fan and the ash hopper of the first-stage superheater.

[0009] Furthermore, the second hot air branch pipe is located on one side of the centrifugal fan, and the first hot air branch pipe is located on one side of the second hot air branch pipe.

[0010] Furthermore, the input end of the air supply fan is installed at the other end of the primary air duct.

[0011] The beneficial effects of this utility model by adopting the above structure are as follows:

[0012] (1) The centrifugal fan draws high-temperature flue gas from the horizontal flue, and after dust removal by the cyclone separator, it is mixed with the primary air, directly recovering the waste heat of the flue gas that was originally directly emitted, and converting it into a heat source for the drying grate system, which greatly reduces the additional energy consumption required for heating the primary air.

[0013] (2) The waste heat of the flue gas is distributed to the lower air chamber of the first drying grate, the lower air chamber of the second drying grate, the lower air chamber of the first combustion grate, and the lower air chamber of the second combustion grate, so that the primary air temperature is raised to 170-180°C.

[0014] (3) The system utilizes existing horizontal flue gas resources, eliminating the need for additional independent heat source equipment, thus reducing equipment investment and operation and maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a horizontal flue gas heating system for a drying furnace exhaust chamber according to the present invention.

[0017] Among them, 1. First-stage superheater ash hopper, 2. Cyclone separator, 3. Centrifugal fan, 4. Conveying pipeline, 5. Hot air branch pipe one, 6. Hot air branch pipe two, 7. Hot air branch pipe three, 8. Primary air duct, 9. Primary air branch pipe one, 10. Primary air branch pipe two, 11. Primary air branch pipe three, 12. Air supply fan, 13. Lower air chamber of the first drying grate, 14. Lower air chamber of the first combustion grate, 15. Lower air chamber of the second drying grate, 16. Lower air chamber of the second combustion grate. Detailed Implementation

[0018] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0019] like Figure 1 As shown, this utility model proposes a horizontal flue gas heating system for a drying grate air chamber, including a primary air duct 8. One end of the primary air duct 8 is installed at the inlet of the lower air chamber 16 of the second combustion grate, and the other end is installed at the inlet of the air supply fan 12. One end of a primary air branch pipe 3 11 is welded through the side wall of the primary air duct 8, and the other end of the primary air branch pipe 3 11 is installed at the inlet of the lower air chamber 15 of the second drying grate. One end of a primary air branch pipe 1 9 is welded through the side wall of the primary air duct 8, and the other end of the primary air branch pipe 1 9 is installed at the inlet of the lower air chamber 14 of the first combustion grate. One end of a primary air branch pipe 2 10 is welded through the side wall of the primary air branch pipe 1 9, and the other end of the primary air branch pipe 2 10 is installed at the inlet of the lower air chamber 13 of the first drying grate. The system also includes a heating component, which includes a primary superheater ash hopper 1 and a primary superheater... The input end of the cyclone separator 2 is connected through the side wall of the ash hopper 1. One end of the conveying pipe 4 is installed at the output end of the cyclone separator 2. The other end of the conveying pipe 4 is welded through to the side wall of the primary air branch pipe 10. The centrifugal fan 3 is installed on the conveying pipe 4. One end of the hot air branch pipe 5 is welded through to the side wall of the conveying pipe 4. The other end of the hot air branch pipe 5 is welded through to the side wall of the primary air branch pipe 9. One end of the hot air branch pipe 6 is connected through to the side wall of the conveying pipe 4. The other end of the hot air branch pipe 6 is welded through to the side wall of the primary air branch pipe 11. One end of the hot air branch pipe 7 is welded through to the side wall of the hot air branch pipe 7. The other end of the hot air branch pipe 7 is welded through to the side wall of the primary air duct 8. The cyclone separator 2 is located between the centrifugal fan 3 and the ash hopper 1 of the primary superheater. The hot air branch pipe 6 is located on one side of the centrifugal fan 3. The hot air branch pipe 5 is located on one side of the hot air branch pipe 6.

[0020] In practical use, the air supply fan 12 is started. Primary air enters the lower air chamber 16 of the second combustion grate through the primary air duct 8, then enters the lower air chamber 15 of the second drying grate through the primary air branch pipe 3 11, enters the lower air chamber 13 of the first drying grate through the primary air branch pipe 2 10, and enters the lower air chamber 14 of the first combustion grate through the primary air branch pipe 1 9. The centrifugal fan 3 is turned on, and flue gas is taken from the ash hopper 1 of the first-stage superheater in the horizontal flue (the actual measured temperature of the centrifugal fan is 300°C). After the flue gas has been dusted by the cyclone separator 2, it is pressurized by the centrifugal fan 3 and then enters the primary air branch pipe 2 1 through the conveying pipe 4. The air enters the lower air chamber 13 of the first drying grate after mixing with the primary air. It then enters the primary air branch pipe 9 through the hot air branch pipe 1 5, mixes with the primary air, and enters the lower air chamber 14 of the first combustion grate. It then enters the primary air branch pipe 11 through the hot air branch pipe 2 6, mixes with the primary air, and enters the lower air chamber 15 of the second drying grate. Finally, it enters the primary air duct 8 through the hot air branch pipe 3 7, mixes with the primary air, and enters the lower air chamber 16 of the second combustion grate, thereby increasing the primary air temperature to 170-180°C. This is the overall working process of this utility model. This process can be repeated for the next use.

[0021] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows:

[0022] A centrifugal fan draws high-temperature flue gas from the horizontal flue, which is then mixed with primary air after being dedusted by a cyclone separator. This process directly recovers the waste heat from the originally directly emitted flue gas and converts it into a heat source for the drying grate system, significantly reducing the additional energy consumption required for heating the primary air. The waste heat from the flue gas is distributed to the lower air chambers of the first drying grate, the second drying grate, the first combustion grate, and the second combustion grate, raising the primary air temperature to 170-180°C. The system utilizes existing horizontal flue gas resources without the need for additional independent heat source equipment, reducing equipment investment and operation and maintenance costs.

[0023] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A horizontal flue gas heating system for a drying grate air chamber, comprising a primary air duct (8), one end of which is installed at the inlet of the lower air chamber (16) of a second combustion grate; one end of a primary air branch pipe three (11) is welded through to the side wall of the primary air duct (8); the other end of the primary air branch pipe three (11) is installed at the inlet of the lower air chamber (15) of the second drying grate; one end of a primary air branch pipe one (9) is welded through to the side wall of the primary air duct (8); the other end of the primary air branch pipe one (9) is installed at the inlet of the lower air chamber (14) of a first combustion grate; one end of a primary air branch pipe two (10) is welded through to the side wall of the primary air branch pipe one (9); the other end of the primary air branch pipe two (10) is installed at the inlet of the lower air chamber (13) of the first drying grate, characterized in that: It also includes a heating element.

2. The horizontal flue gas heating system for a drying furnace exhaust chamber according to claim 1, characterized in that: The heating assembly includes a primary superheater ash hopper (1), the input end of a cyclone separator (2) is connected through the side wall of the primary superheater ash hopper (1), one end of a conveying pipe (4) is installed at the output end of the cyclone separator (2), the other end of the conveying pipe (4) is welded through to the side wall of the primary air branch pipe two (10), a centrifugal fan (3) is installed on the conveying pipe (4), and a hot air branch pipe one (5) is welded through the side wall of the conveying pipe (4). One end of the hot air branch pipe (5) is connected to the side wall of the primary air branch pipe (9), the other end of the hot air branch pipe (4) is connected to one end of the hot air branch pipe (6), the other end of the hot air branch pipe (6) is connected to the side wall of the primary air branch pipe (11), the side wall of the hot air branch pipe (6) is connected to one end of the hot air branch pipe (7), and the other end of the hot air branch pipe (7) is connected to the side wall of the primary air duct (8).

3. The horizontal flue gas heating system for a drying furnace exhaust chamber according to claim 2, characterized in that: The cyclone separator (2) is located between the centrifugal fan (3) and the ash hopper (1) of the first-stage superheater.

4. A horizontal flue gas heating system for a drying furnace exhaust chamber according to claim 3, characterized in that: The second hot air pipe (6) is located on one side of the centrifugal fan (3), and the first hot air pipe (5) is located on one side of the second hot air pipe (6).

5. A horizontal flue gas heating system for a drying furnace exhaust chamber according to claim 4, characterized in that: The other end of the primary air duct (8) is equipped with the input end of the air supply fan (12).

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