Pyrolysis high-temperature combustion type hot cleaning furnace

Abstract

A pyrolysis high-temperature combustion type hot cleaning furnace comprises a cracking chamber and an oxidation combustion chamber, the oxidation combustion chamber is arranged at the top of the cracking chamber, a chimney is arranged at the top of the oxidation combustion chamber, a cracking combustion machine is arranged below the cracking chamber, a rail extending to a feeding and discharging port of the cracking chamber is arranged at the bottom in the cracking chamber, and a slidable material containing trolley is arranged on the rail. A first thermocouple is arranged in the direction in which smoke of the cracking chamber is led to the oxidation combustion chamber, a cooling spiral nozzle is arranged at the upper part in the cracking chamber, the cracking chamber is communicated with the oxidation combustion chamber through a connecting flue, and an outlet of the oxidation combustion chamber is communicated with a chimney. The oxidation combustion chamber adopts a cylindrical structure, and the flue gas inlet and the oxidation gas turbine nozzle are tangent to the cylindrical oxidation combustion chamber, so that combustible flue gas forms a rotating vortex in the oxidation combustion chamber, forced mixed combustion is realized, the residence time of the flue gas is prolonged, and the combustion is more sufficient and thorough.

Description

Technical Field

[0001] This utility model relates to the field of thermal cleaning furnace technology, specifically a pyrolysis high-temperature combustion type thermal cleaning furnace. Background Technology

[0002] A thermal cleaning furnace is a coating stripping device used in the spraying industry, such as for removing coatings from spray painting fixtures, unsuitable paint or powder coatings from steel surfaces, filters from water curtain spray booths, and adhesive layers from fan impellers. The principle is to place the coated workpiece into the thermal cleaning furnace, heat it to decompose the coating, causing it to detach from the workpiece surface. The coating is then broken down into combustible flue gas, which is burned in the secondary combustion chamber and discharged through the chimney.

[0003] In the prior art, such as the utility model patent number CN202323455934, the flue gas generated in the main combustion chamber is incinerated and discharged in the auxiliary combustion chamber at 400°C. However, at this temperature, the harmful gases in the flue gas cannot be effectively decomposed and transformed, which can easily cause secondary pollution.

[0004] In existing technologies, the auxiliary combustion chamber is mostly rectangular and connected to the main combustion chamber. This structure is not conducive to the formation of flue gas turbulence, easily creates dead zones, and has a short residence time, which makes it impossible to achieve sufficient mixing and incomplete combustion, thus failing to achieve the best treatment effect. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a pyrolysis high-temperature combustion thermal cleaning furnace.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: a pyrolysis high-temperature combustion type thermal cleaning furnace, including a pyrolysis chamber and an oxidation combustion chamber. The oxidation combustion chamber is located at the top of the pyrolysis chamber, and a chimney is provided at the top of the oxidation combustion chamber. A pyrolysis burner is provided below the pyrolysis chamber. A track extending to the inlet and outlet of the pyrolysis chamber is provided at the bottom of the pyrolysis chamber. A sliding material feeding trolley is provided on the track. The inlet and outlet of the pyrolysis chamber are sealed with an openable door panel. A first thermocouple is provided in the direction of flue gas from the pyrolysis chamber to the oxidation combustion chamber. A cooling spiral nozzle is provided in the upper part of the pyrolysis chamber. The cooling spiral nozzle is connected to an external cooling pipe and a cooling water pump. The pyrolysis chamber and the oxidation combustion chamber are connected through a connecting flue. The outlet of the oxidation combustion chamber is connected to the chimney. The flue gas inlet of the oxidation combustion chamber is tangent to the cylindrical shape of the oxidation combustion chamber.

[0007] Furthermore, the inner linings of the pyrolysis chamber and the oxidation combustion chamber are made of ceramic fiber cotton.

[0008] Furthermore, the bottom of the pyrolysis chamber is lined with refractory castable and a ventilated refractory furnace.

[0009] Furthermore, a control box is installed on the outer wall of the pyrolysis chamber, and an oil tank for supplying combustion oil is installed on the rear outer wall.

[0010] Furthermore, a second thermocouple is installed in the upper part of the oxidation combustion chamber.

[0011] Furthermore, an oxidation burner is installed at the end of the connecting flue.

[0012] Furthermore, the cooling spiral nozzle is set at a downward angle.

[0013] With the above settings, this utility model has the following beneficial effects:

[0014] 1. In this utility model, the workpiece with the coating is placed on a trolley and heated to 300°C by a burner. The coating on the workpiece gradually decomposes into combustible flue gas, which enters the oxidation combustion chamber through the connecting flue for high-temperature incineration. The combustion temperature is set above 850°C, which makes the incineration more thorough and can effectively decompose the harmful gases in the flue gas.

[0015] 2. In this utility model, the oxidation combustion chamber adopts a cylindrical structure. The flue gas inlet and the oxidation gas turbine nozzle are tangent to the cylindrical oxidation combustion chamber, so that the combustible flue gas forms a rotating vortex in the oxidation combustion chamber, realizing forced mixing and combustion, and the flue gas residence time is extended, making the combustion more complete and thorough.

[0016] 3. The cylindrical structure design of the oxidation combustion chamber has advantages such as small size and light weight, which makes the oxidation combustion chamber more compact and space-saving, while also facilitating installation and maintenance; moreover, it has good stability when subjected to pressure and temperature changes, ensuring stable operation of the combustion process. Attached Figure Description

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 3 This is a top view of the structure of this utility model;

[0021] Figure 4 This is a side view structural diagram of the present invention;

[0022] Figure 5 for Figure 4 Schematic diagram of the AA section structure;

[0023] Figure 6 for Figure 3 A schematic diagram of the BB cross-section structure. Detailed Implementation

[0024] like Figure 1-6 As shown, a pyrolysis high-temperature combustion type thermal clean furnace includes a pyrolysis chamber 1 and an oxidation combustion chamber 9. The oxidation combustion chamber 9 is located on top of the pyrolysis chamber 1, and a chimney 10 is provided on top of the oxidation combustion chamber 9. A pyrolysis burner 12 is provided below the pyrolysis chamber 1. A track 16 extending to the inlet and outlet of the pyrolysis chamber 1 is provided at the bottom of the pyrolysis chamber 1. A sliding material feeding trolley 15 is provided on the track 16. The inlet and outlet of the pyrolysis chamber 1 are sealed by an openable door panel 11. A first thermocouple 5 is provided in the direction of flue gas from the pyrolysis chamber 1 to the oxidation combustion chamber 9. A cooling spiral nozzle 18 is provided in the upper part of the pyrolysis chamber 1. The cooling spiral nozzle 18 is connected to an external cooling pipe 6 and a cooling water pump 2. The pyrolysis chamber 1 and the oxidation combustion chamber 9 are connected through a connecting flue 8. The outlet of the oxidation combustion chamber 9 is connected to the chimney 10, and the flue gas inlet of the oxidation combustion chamber 9 is tangent to the cylinder of the oxidation combustion chamber 9.

[0025] Specifically: the inner lining of the pyrolysis chamber 1 and the oxidation combustion chamber 9 is made of ceramic fiber cotton 17, the bottom of the pyrolysis chamber is laid with refractory castable 19 and a ventilated refractory furnace 14, a control box 3 is installed on the outer wall of the pyrolysis chamber 1, and an oil tank 4 for supplying combustion oil is installed on the rear outer wall. A second thermocouple 13 is installed in the upper part of the oxidation combustion chamber 9, and an oxidation burner 7 is installed at the end of the connecting flue 8. The nozzle of the oxidation burner 7 is also tangent to the cylindrical oxidation combustion chamber 9, and the cooling spiral nozzle 18 is inclined downward at 45°.

[0026] The working principle of this utility model is as follows: The workpiece to be processed is placed on the feeding trolley 15, the feeding sealing door 11 of the pyrolysis chamber 1 is opened, the feeding trolley 15 is pushed into the inner cavity of the pyrolysis chamber 1, and the door 11 is closed. The pyrolysis burner 12 and the oxidation burner 7 are turned on simultaneously through the control box 3. The pyrolysis burner 12 heats the workpiece (the ventilated refractory furnace 14 isolates the flame) through convection heating. When the temperature inside the pyrolysis chamber 1 rises to about 300°C, the coating on the surface of the workpiece begins to gradually decompose into combustible gas (black smoke-like decomposition products). The control box 3 is automatically controlled by the first thermocouple 5. The temperature inside the pyrolysis chamber 1 is controlled to not exceed 420°C through the cooling spiral nozzle 18, cooling pipe 6, and cooling water pump 2 to maintain the pyrolysis state and ensure the decomposition product speed and concentration. The decomposed combustible gas enters the oxidation combustion chamber 9 through the connecting flue 8 for high-temperature combustion. The second thermocouple 13 controls the oxidation burner 7 to ensure that the temperature is not lower than 850°C, so that the harmful gases are completely decomposed and burned off. Finally, the gas is discharged through the chimney 10.

[0027] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A pyrolysis high-temperature combustion type thermal cleaning furnace, comprising a pyrolysis chamber (1) and an oxidation combustion chamber (9), wherein the oxidation combustion chamber (9) is disposed on top of the pyrolysis chamber (1), and a chimney (10) is disposed on top of the oxidation combustion chamber (9), characterized in that: A pyrolysis burner (12) is installed below the pyrolysis chamber (1). A track (16) extending to the inlet and outlet of the pyrolysis chamber (1) is installed at the bottom of the pyrolysis chamber (1). A sliding material trolley (15) is installed on the track (16). The inlet and outlet of the pyrolysis chamber (1) are sealed with an openable door panel (11). A first thermocouple (5) is installed in the direction of the flue gas from the pyrolysis chamber (1) to the oxidation combustion chamber (9). A cooling spiral nozzle (18) is installed in the upper part of the pyrolysis chamber (1). The cooling spiral nozzle (18) is connected to the external cooling pipe (6) and the cooling water pump (2). The pyrolysis chamber (1) and the oxidation combustion chamber (9) are connected through the connecting flue (8). The outlet of the oxidation combustion chamber (9) is connected to the chimney (10). The oxidation combustion chamber (9) adopts a cylindrical structure. The flue gas inlet of the oxidation combustion chamber (9) is tangent to the cylinder of the oxidation combustion chamber (9).

2. The pyrolysis high-temperature combustion type thermal cleaning furnace as described in claim 1, characterized in that: The inner lining of the pyrolysis chamber (1) and the oxidation combustion chamber (9) is made of ceramic fiber cotton (17).

3. The pyrolysis high-temperature combustion type thermal cleaning furnace as described in claim 1, characterized in that: The bottom of the pyrolysis chamber is lined with refractory castable (19) and a ventilated refractory furnace (14).

4. The pyrolysis high-temperature combustion type thermal cleaning furnace as described in claim 1, characterized in that: A control box (3) is installed on the outer wall of the pyrolysis chamber (1), and an oil tank (4) for supplying combustion oil is installed on the rear outer wall.

5. The pyrolysis high-temperature combustion type thermal cleaning furnace as described in claim 1, characterized in that: A second thermocouple (13) is installed in the upper part of the oxidation combustion chamber (9).

6. The pyrolysis high-temperature combustion type thermal cleaning furnace as described in claim 1, characterized in that: An oxidation burner (7) is installed at the end of the connecting flue (8), and the nozzle of the oxidation burner (7) is also tangent to the cylindrical oxidation combustion chamber (9).

7. The pyrolysis high-temperature combustion type thermal cleaning furnace as described in claim 1, characterized in that: The cooling spiral nozzle (18) is set at a 45° downward angle.

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