Combustion chamber of high-temperature pyrolysis gasifier

Abstract

The utility model discloses a combustion chamber of a high-temperature pyrolysis gasification furnace, which comprises a furnace body with a primary combustion chamber and a secondary combustion chamber, and a heat exchanger, a flue gas outlet is formed in the right end of the furnace body; a plurality of baffle walls are arranged in the secondary combustion cavity at intervals in the flowing direction of smoke, and openings are formed in the baffle walls. The openings are staggered up and down along the flowing direction of flue gas, so that a flue gas flowing path forms a rectangular wave shape; a plurality of ash removal openings are formed in the lower part of the secondary combustion cavity, and detachable plugging blocks are arranged on the ash removal openings; and the heat exchanger is connected with the heat exchanger through a connecting pipe. The utility model has the advantages that the baffling wall not only changes the flowing direction of the smoke, but also promotes the effective sedimentation of the smoke dust in the smoke through the guiding effect, so that the smoke dust content in the smoke is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste treatment equipment technology, and in particular to a combustion chamber of a high-temperature pyrolysis gasification furnace. Background Technology

[0002] The high-temperature pyrolysis gasification furnace heats waste to high temperatures in an oxygen-free or low-oxygen environment, decomposing organic matter into combustible gases and solid residues. This process effectively reduces waste volume and recovers energy and materials, which is of great significance for resource recycling and environmental protection. The generated gases undergo high-temperature oxygen-enriched combustion in the secondary combustion chamber. This process reduces the formation of harmful substances such as dioxins due to the low-oxygen conditions, and the temperature of approximately 1100°C and the flue gas residence time of more than 2 seconds in the secondary combustion chamber further decompose these harmful substances, ensuring that emissions meet national standards.

[0003] In a high-temperature pyrolysis gasifier, after the material undergoes pyrolysis and gasification on the grate in the combustion chamber, the resulting combustible gas carries the flue gas into the secondary combustion chamber. However, existing secondary combustion chambers typically employ a through-cavity design, which is not ideal for flue gas settling. As a result, a large amount of flue gas flows directly into the heat exchanger with the gas flow. These fine particles not only reduce the heat exchanger's efficiency but can also gradually accumulate and eventually clog the internal channels. Once clogged, frequent shutdowns for cleaning are required, increasing maintenance frequency and costs. Furthermore, in the long run, this can affect the stable operation of the entire system and energy efficiency. Therefore, taking effective improvement measures to address this problem is crucial. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a combustion chamber for a high-temperature pyrolysis gasification furnace.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A combustion chamber of a high-temperature pyrolysis gasification furnace includes a furnace body having a primary combustion chamber and a secondary combustion chamber, and a heat exchanger; a flue gas outlet is provided at the right end of the furnace body; multiple baffle walls are arranged at intervals along the flow direction of the flue gas in the secondary combustion chamber, and the baffle walls are provided with openings; the openings are arranged vertically staggered along the flow direction of the flue gas, so that the flue gas flow path forms a rectangular wave shape; multiple ash removal ports are provided at the lower part of the secondary combustion chamber, and removable plugs are provided on the ash removal ports; the heat exchanger is connected to the furnace body via connecting pipes.

[0007] Preferably, the baffle wall consists of three sections.

[0008] Preferably, the secondary combustion chamber is provided with an inspection door.

[0009] Preferably, the heat exchanger is a shell-and-tube heat exchanger.

[0010] Preferably, the height of the opening is not less than one-third of the height of the baffle wall.

[0011] Preferably, the connecting pipe is a rectangular duct.

[0012] The above technical solution has the following advantages:

[0013] This invention incorporates a baffle wall within the secondary combustion chamber, significantly increasing the flue gas flow path without altering the chamber's length. The baffle wall not only changes the flue gas flow direction but also guides the effective settling of particulate matter, thereby drastically reducing its concentration. Furthermore, the extended flow path increases the residence time of combustible gases within the secondary combustion chamber, providing more time for the decomposition of harmful substances such as dioxins. This not only further improves combustion efficiency and reduces harmful emissions but also effectively prevents heat exchanger blockage caused by particulate matter deposition, thus extending the overall lifespan of the equipment and reducing daily operation and maintenance costs. This improvement not only enhances the system's environmental performance but also strengthens its economic efficiency and reliability. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention;

[0015] Figure 2 for Figure 1 The left view;

[0016] Figure 3 for Figure 1 Top view;

[0017] Figure 4 for Figure 3 Sectional view of AA;

[0018] Figure 5 for Figure 4 Enlarged view of the middle section;

[0019] Figure 6 This is a 3D view of the heat exchanger;

[0020] In the picture:

[0021] 1- Primary combustion chamber, 2- Secondary combustion chamber, 3- Furnace body, 4- Heat exchanger, 5- Flue gas outlet, 6- Baffle wall, 7- Opening, 8- Ash removal port, 9- Disassembled plug, 10- Connecting pipe, 11- Inspection door. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] As shown in the attached figure, a combustion chamber of a high-temperature pyrolysis gasification furnace includes a furnace body 3 having a primary combustion chamber 1 and a secondary combustion chamber 2, and a heat exchanger 4; a flue gas outlet 5 is provided at the right end of the furnace body 3; three baffle walls 6 are arranged at intervals along the flow direction of the flue gas in the secondary combustion chamber 2, and openings 7 are provided on the baffle walls 6; the openings 7 are arranged vertically staggered along the flow direction of the flue gas, so that the flue gas flow path forms a rectangular wave shape; multiple ash removal ports 8 are provided at the lower part of the secondary combustion chamber 2, and removable plugs 9 are provided on the ash removal ports 8; the heat exchanger 4 is connected to the furnace body 3 via a connecting pipe 10.

[0024] As a further improvement to this embodiment, the secondary combustion chamber 2 is provided with an inspection door 11 to facilitate the inspection and maintenance of the secondary combustion chamber 2.

[0025] As a preferred technical solution in this embodiment, the heat exchanger 4 adopts a shell-and-tube heat exchanger, which has the advantages of convenient maintenance and high heat exchange efficiency. The heat exchanger 4 can partially recover the heat energy in the flue gas.

[0026] As a preferred technical solution in this embodiment, the height of the opening 7 is not less than one-third of the height of the baffle wall 6, so as to ensure effective settling of soot in the flue gas while ensuring that the flow rate of the flue gas meets the combustion requirements.

[0027] As a preferred technical solution in this embodiment, the connecting pipe 10 is a rectangular air duct, but obviously other connecting pipe materials can also be used.

[0028] This invention incorporates multiple baffle walls 6 within the secondary combustion chamber 2. These baffle walls significantly increase the flue gas flow path without increasing the length of the secondary combustion chamber 2. The baffle walls 6 not only alter the flow direction of the flue gas but also promote the effective settling of particulate matter in the flue gas through guidance, thereby drastically reducing the particulate matter content. Furthermore, the extended flue gas flow path increases the residence time of combustible gases within the secondary combustion chamber 2, providing more sufficient decomposition time for harmful substances such as dioxins. This not only further improves combustion efficiency and reduces harmful emissions but also effectively prevents heat exchanger 4 blockage caused by particulate matter deposition, thereby extending the overall service life of the equipment and reducing daily operation and maintenance costs.

[0029] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A combustion chamber of a high-temperature pyrolysis gasification furnace, comprising a furnace body (3) having a primary combustion chamber (1) and a secondary combustion chamber (2), and a heat exchanger (4); a flue gas outlet (5) is provided at the right end of the furnace body (3); characterized in that: Multiple baffle walls (6) are arranged at intervals along the flow direction of flue gas in the secondary combustion chamber (2), and openings (7) are provided on the baffle walls (6); the openings (7) are arranged vertically staggered along the flow direction of flue gas, so that the flue gas flow path forms a rectangular wave shape; multiple ash removal ports (8) are provided at the lower part of the secondary combustion chamber (2), and detachable plugs (9) are provided on the ash removal ports (8); the heat exchanger (4) is connected to the heat exchanger (4) through the connecting pipe (10).

2. The combustion chamber of the high-temperature pyrolysis gasification furnace according to claim 1, characterized in that: The deflector wall (6) consists of three sections.

3. The combustion chamber of the high-temperature pyrolysis gasification furnace according to claim 1 or 2, characterized in that: The secondary combustion chamber (2) is equipped with an inspection door (11).

4. The combustion chamber of the high-temperature pyrolysis gasification furnace according to claim 1 or 2, characterized in that: The heat exchanger (4) is a shell-and-tube heat exchanger.

5. The combustion chamber of the high-temperature pyrolysis gasification furnace according to claim 1 or 2, characterized in that: The height of the opening (7) is not less than one-third of the height of the baffle wall (6).

6. The combustion chamber of the high-temperature pyrolysis gasification furnace according to claim 1 or 2, characterized in that: The connecting pipe (10) is a rectangular air duct.

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