Hybrid heating system for powder coating curing process

Abstract

This utility model discloses a hybrid heating system for powder coating curing processes, comprising a powder curing oven with a heating pipe inside; a biomass pellet burner connected to the heating pipe; a heating fan for outputting hot air into the powder curing oven; a hot air circulation device connected to the interior of the powder curing oven via a circulation duct; and a natural gas burner connected to the circulation duct. The hot air output by the heating fan flows sequentially through the powder curing oven, the biomass pellet burner, the natural gas burner, and the hot air circulation device. This utility model, through a parallel design of dual-fuel burners, allows for flexible selection of natural gas or biomass pellet combustion modes according to production needs, balancing rapid heating with energy saving and environmental protection. The natural gas burner and the biomass pellet burner share a single hot air circulation device, saving costs.

Description

Technical Field

[0001] This utility model relates to the technical field of electrostatic powder spraying, and in particular to a hybrid heating system for powder coating curing processes. Background Technology

[0002] In electrostatic powder coating processes, traditional powder curing ovens use two methods of hot air circulation heating: direct heating with natural gas or indirect heating with biomass pellets. This presents a technical problem of a single heat source: although the direct heating natural gas combustion system heats up quickly, it has high fuel costs and high carbon emission pressure; although the biomass pellet burner is environmentally friendly, the indirect heating mode has low thermal efficiency. Utility Model Content

[0003] The main objective of this invention is to provide a hybrid heating system for powder coating curing processes, which aims to effectively solve at least one of the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] This utility model discloses a hybrid heating system for powder coating curing processes, comprising:

[0006] Powder curing oven, which is equipped with heating pipes;

[0007] A biomass pellet burner, which is connected to the heating pipe;

[0008] A heating fan is used to output hot air into the powder curing oven;

[0009] A hot air circulation device is connected to the inside of the powder curing oven via a circulation duct;

[0010] A natural gas burner, which is connected to the circulating air duct;

[0011] The hot air output from the heating fan flows sequentially through the powder curing oven, the bio-particle burner, the natural gas burner, and the hot air circulation device.

[0012] Compared with existing technologies, this utility model adopts a parallel design of dual-fuel burners, which can flexibly select natural gas or biomass pellet combustion mode according to production needs, taking into account both rapid heating and energy saving and environmental protection; the natural gas burner and the biomass pellet burner use a set of hot air circulation device, saving costs; the hot air circulation device ensures uniform temperature in the powder curing oven, improves the curing quality of the paint film, and can use the hot air output from the heating fan as an air combustion aid for the natural gas burner and the biomass pellet burner.

[0013] In a preferred embodiment, the biomass pellet burner includes a fuel conveyor and a heat exchanger combustion furnace;

[0014] The fuel conveyor is connected to the heat exchanger and is used to deliver fuel to the heat exchanger;

[0015] The heat exchanger combustion furnace has a burner opening and a conical furnace chamber. The burner opening is used to ignite the fuel, and the furnace chamber is connected to the heating pipe.

[0016] In a preferred embodiment, the powder curing oven is provided with a smoke exhaust pipe, which is connected to the heating pipe.

[0017] In a preferred embodiment, the heating pipe is provided with an anti-clogging and maintenance device; the anti-clogging and maintenance device includes a removable filter screen and a maintenance valve, the filter screen is installed on the inner wall of the heating pipe, and the maintenance valve is located downstream of the filter screen.

[0018] In a preferred embodiment, the natural gas burner includes a burner and a combustion chamber, the burner being connected to the combustion chamber, the burner being used for ignition, and the combustion chamber being connected to the circulating air duct.

[0019] In a preferred embodiment, the hybrid heating system for the powder coating curing process further includes an isolation chamber, the powder curing oven being connected to the isolation chamber, and the biomass burner and the natural gas burner being disposed within the isolation chamber.

[0020] In a preferred embodiment, the hot air circulation device includes a hot air circulation fan connected to the circulation duct, the hot air circulation fan being located in the isolation chamber and downstream of the natural gas burner.

[0021] In a preferred embodiment, the powder curing oven is equipped with a digital temperature controller and a temperature sensor. The digital temperature controller is located outside the powder curing oven, and the temperature sensor is located inside the powder curing oven. The digital temperature controller is electrically connected to the temperature sensor, the biomass pellet burner, and the natural gas burner.

[0022] To better understand and implement this invention, the following diagram, in conjunction with the accompanying drawings, provides a detailed description. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1This is a front view of the bio-particle burner in operation, part of a hybrid heating system used in powder coating curing processes.

[0025] Figure 2 This is a top view of the bio-particle burner in operation of a hybrid heating system used in powder coating curing processes.

[0026] Figure 3 This is a side view of a hybrid heating system used in powder coating curing processes.

[0027] Figure 4 This is a front view of the natural gas burner in operation of a hybrid heating system used for powder coating curing processes.

[0028] Figure 5 This is a top view of the natural gas burner in operation of a hybrid heating system used for powder coating curing processes.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Fuel conveyor, 2. Heat exchanger combustion furnace, 3. Circulating air duct, 4. Heating pipe, 5. Heating fan, 6. Hot air circulating fan, 7. Burner, 8. Anti-clogging maintenance device, 9. Smoke exhaust pipe, 10. Powder curing oven, 11. Burning port, 12. Isolation chamber, 13. Burning tube. Detailed Implementation

[0031] To better illustrate this utility model, a further detailed description of this utility model is provided below with reference to the accompanying drawings.

[0032] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0033] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0034] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] Combination Figures 1 to 5 As shown, this utility model discloses a hybrid heating system for powder coating curing processes, comprising:

[0036] Powder curing oven 10, which is equipped with heating pipe 4;

[0037] A biomass pellet burner, which is connected to the heating pipe 4;

[0038] Heating fan 5 is used to output hot air into the powder curing oven 10;

[0039] A hot air circulation device is connected to the inside of the powder curing oven 10 through a circulation duct 3;

[0040] A natural gas burner, which is connected to the circulating air duct 3;

[0041] The hot air output by the heating fan 5 flows sequentially through the powder curing oven 10, the bio-particle burner, the natural gas burner, and the hot air circulation device.

[0042] Compared with existing technologies, this utility model adopts a parallel design of dual-fuel burners, which can flexibly select natural gas (direct) or biomass pellet (indirect) heating mode according to production needs, taking into account both rapid heating and energy saving and environmental protection; the natural gas burner and the biomass pellet burner use a set of hot air circulation device, saving costs; the hot air circulation device ensures uniform temperature in the powder curing oven 10, improves the curing quality of the paint film, and can use the hot air output from the heating fan 5 as an air combustion aid for the natural gas burner and the biomass pellet burner.

[0043] Combination Figures 1 to 3 In this embodiment, the bio-particle burner includes a fuel conveyor 1 and a heat exchanger combustion furnace 2. The fuel conveyor 1 is connected to the heat exchanger and is used to deliver fuel to the heat exchanger. The heat exchanger combustion furnace 2 has a burner 11 and a conical furnace chamber (not shown). The burner 11 is used to ignite the fuel, and the furnace chamber is connected to the heating pipe 4. The fuel conveyor 1 delivers bio-particle fuel to the heat exchanger combustion furnace 2. The burner 11 of the combustion furnace ignites the fuel. After the particles burn, the heat is transferred sequentially through the conical furnace chamber and the heating pipe 4 to the powder curing furnace 10.

[0044] In this embodiment, the powder curing oven 10 is provided with a flue pipe 9, which is connected to the heating pipe 4 so that the exhaust gas generated by the bio-particle burner or the natural gas burner can be discharged through the flue pipe 9.

[0045] In this embodiment, an anti-clogging maintenance device 8 is provided on the heating pipe 4. The anti-clogging maintenance device 8 includes a detachable filter screen and a maintenance valve. The filter screen is installed on the inner wall of the heating pipe 4, and the maintenance valve is located downstream of the filter screen. The filter screen intercepts ash and slag produced by the combustion of biomass pellets, preventing pipe blockage; the maintenance valve supports quick cleaning and maintenance, reducing downtime.

[0046] Combination Figure 3 and Figure 4 In this embodiment, the natural gas burner includes a burner 7 and a combustion chamber 13. The burner 7 is connected to the combustion chamber 13 and is used for ignition. The combustion chamber 13 is connected to the circulating air duct 3. When the natural gas combustion system is used, the fuel burner is automatically ignited, and flame combustion occurs directly in the combustion chamber 13. The heat is released sequentially through the combustion chamber 13 and the circulating air duct 3 into the powder curing oven 10.

[0047] Combination Figure 2 and Figure 4 As shown, in this embodiment, the hybrid heating system for the powder coating curing process further includes an isolation chamber 12. The powder curing oven 10 is connected to the isolation chamber 12, and the biomass burner and the natural gas burner are disposed within the isolation chamber 12. On one hand, since the biomass burner and the natural gas burner consume air during operation, and the powder curing oven 10 is supplied with hot air by a hot air blower, the air pressure at the isolation chamber 12 is lower than that at the powder curing oven 10. Under the influence of this pressure difference, the hot air output by the hot air blower flows into the isolation chamber 12, and passes through the biomass burner and the natural gas burner. The biomass burner and the natural gas burner can use the hot air as an air-assisted fuel for recycling. Finally, the hot air can return to the powder curing oven 10 via a hot air circulation device, improving the utilization rate of the hot air. On the other hand, the isolation chamber 12 encloses the biomass burner and the natural gas burner, providing insulation and reducing the impact on the external temperature.

[0048] Combination Figure 4As shown, the hot air circulation device further includes a hot air circulation fan 6, which is connected to the circulation duct 3. The hot air circulation fan 6 is located in the isolation chamber 12 and downstream of the natural gas burner, so as to circulate the hot air output by the heating fan 5, so that the hot air returns to the powder curing oven 10 and then flows through the bio-particle burner, the natural gas burner and the hot air circulation device again to achieve circulation.

[0049] In this embodiment, the powder curing oven 10 is equipped with a digital temperature controller (not shown) and a temperature sensor (not shown). The digital temperature controller is located outside the powder curing oven 10, and the temperature sensor is located inside the powder curing oven. The digital temperature controller is electrically connected to the temperature sensor, the bio-particle burner, and the natural gas burner. The digital temperature controller collects and displays the temperature inside the powder curing oven 10 through the temperature sensor, and controls the operation of the bio-particle burner or the natural gas burner based on the temperature inside the powder curing oven 10.

[0050] This utility model is not limited to the above-described embodiments. If any modifications or variations to this utility model do not depart from the spirit and scope of this utility model, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this utility model, then this utility model also intends to include such modifications and variations.

Claims

1. A hybrid heating system for powder coating curing processes, characterized in that, include: Powder curing oven, which is equipped with heating pipes; A biomass pellet burner, which is connected to the heating pipe; A heating fan is used to output hot air into the powder curing oven; A hot air circulation device is connected to the inside of the powder curing oven via a circulation duct; A natural gas burner, which is connected to the circulating air duct; The hot air output from the heating fan flows sequentially through the powder curing oven, the bio-particle burner, the natural gas burner, and the hot air circulation device.

2. The hybrid heating system for powder coating curing process according to claim 1, characterized in that, The bio-particle burner includes a fuel conveyor and a heat exchanger combustion furnace; The fuel conveyor is connected to the heat exchanger and is used to deliver fuel to the heat exchanger; The heat exchanger combustion furnace has a burner opening and a conical furnace chamber. The burner opening is used to ignite the fuel, and the furnace chamber is connected to the heating pipe.

3. The hybrid heating system for powder coating curing process according to claim 1, characterized in that, The powder curing oven is equipped with a smoke exhaust pipe, which is connected to the heating pipe.

4. The hybrid heating system for powder coating curing process according to claim 1, characterized in that, The heating pipe is equipped with an anti-clogging and maintenance device; the anti-clogging and maintenance device includes a detachable filter screen and a maintenance valve, the filter screen is installed on the inner wall of the heating pipe, and the maintenance valve is located downstream of the filter screen.

5. The hybrid heating system for powder coating curing process according to claim 1, characterized in that, The natural gas burner includes a burner and a combustion chamber. The burner is connected to the combustion chamber and is used for ignition. The combustion chamber is connected to the circulating air duct.

6. The hybrid heating system for powder coating curing process according to claim 1, characterized in that, It also includes an isolation chamber, the powder curing oven is connected to the isolation chamber, and the biomass burner and the natural gas burner are located in the isolation chamber.

7. The hybrid heating system for powder coating curing process according to claim 6, characterized in that, The hot air circulation device includes a hot air circulation fan, which is connected to the circulation duct. The hot air circulation fan is located in the isolation chamber and downstream of the natural gas burner.

8. The hybrid heating system for powder coating curing process according to claim 1, characterized in that, The powder curing oven is equipped with a digital temperature controller and a temperature sensor. The digital temperature controller is located outside the powder curing oven, and the temperature sensor is located inside the powder curing oven. The digital temperature controller is electrically connected to the temperature sensor, the biomass pellet burner, and the natural gas burner.

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