A dual-pass return air gas heater

Abstract

The utility model provides a kind of double-path air supply and return gas heater, including heating furnace, combustor, combustion cylinder, filter assembly, fan assembly, air supply pipe and return air pipe;Combustion cylinder and filter assembly are installed to the inside of heating furnace, combustor is installed to the side of heating furnace close to combustion cylinder, fan assembly is installed to the side of heating furnace close to filter assembly;Air supply pipe is installed to the top side of heating furnace, and correspond with fan assembly;Return air pipe is installed to the other side of heating furnace top, and is communicated to the inside of heating furnace;The flame generated by combustor burns in combustion cylinder;Filter assembly is used to filter flame;Fan assembly is used to hot air suction and discharge from air supply pipe;The hot air discharged can enter heating furnace to be reheated and continue to discharge from air supply pipe, form circulating air path.The utility model realizes efficient hot air circulation, uniform heating, sufficient combustion, to meet the needs of energy saving and environmental protection, stable drying.

Description

Technical Field

[0001] This utility model belongs to the field of heaters, and in particular relates to a dual-circuit supply and return air gas heater. Background Technology

[0002] In enclosed tunnel drying ovens, products typically require continuous drying. Traditional drying methods mainly rely on electric heating or single-path hot air circulation systems, which have the following problems: hot air after a single heating cycle is directly discharged, failing to fully utilize residual heat, resulting in energy waste and high operating costs; the single hot air circulation path in traditional drying ovens easily leads to uneven temperature distribution within the oven, affecting product quality; if the gas heater's combustion structure is not optimized, it may result in incomplete combustion, producing harmful gases or carbon deposits, affecting equipment lifespan and environmental friendliness. Therefore, there is an urgent need for a heater to work in conjunction with tunnel drying ovens to solve the above problems. Utility Model Content

[0003] In view of this, the present invention aims to propose a dual-path supply and return air gas heater to achieve efficient hot air circulation, uniform heating, and complete combustion, so as to meet the needs of energy saving, environmental protection, and stable drying.

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

[0005] A dual-flow supply and return air gas heater includes a heating furnace, a burner, a combustion cylinder, a filter assembly, a fan assembly, a supply air duct, and a return air duct;

[0006] The combustion chamber and filter assembly are installed inside the heating furnace, the burner is installed on the side of the heating furnace near the combustion chamber, and the fan assembly is installed on the side of the heating furnace near the filter assembly.

[0007] The air supply duct is installed on one side of the top of the heating furnace and corresponds to the fan assembly; the return air duct is installed on the other side of the top of the heating furnace and connects to the interior of the heating furnace.

[0008] The flame generated by the burner burns in the combustion chamber; the filter assembly is used to filter the flame.

[0009] The fan assembly is used to draw in the hot air generated by the flame and discharge it from the air supply pipe;

[0010] The exhausted hot air can enter the heating furnace through the return air duct for reheating and continue to be discharged from the supply air duct, forming a circulating air path.

[0011] Furthermore, the combustion cylinder has a barrel-shaped structure and is installed in the middle of the heating furnace by several supports. The combustion cylinder divides the heating furnace into two return air heating zones.

[0012] The combustion cylinder is provided with several through holes in its lower middle part;

[0013] The end of the combustion cylinder is connected to a flame-arresting umbrella cover via several support rods.

[0014] Furthermore, the filtering assembly includes a filter frame and a filter screen;

[0015] Several parallel filter frames are mounted on an integrated plate, and the integrated plate is provided with through holes corresponding to the filter frames;

[0016] The filter frame is installed into the heating furnace via an integrated plate, and the filter screen is installed inside the filter frame. The filter screen is made of stainless steel.

[0017] Furthermore, the fan assembly includes a fan body and a connection port, both of which are installed on the side wall of the heating furnace. The connection port is installed above the fan and is connected to the air supply pipe.

[0018] Furthermore, the number of fan assemblies is two, and a partition is provided between the integrated plate and the inner wall of the heating furnace, with the partition positioned between the two fan assemblies.

[0019] Furthermore, the top of the heating furnace is provided with two air supply pipes that communicate with the connection port;

[0020] The top of the heating furnace is also equipped with two return air pipes, which are respectively connected to two return air heating zones.

[0021] Furthermore, the outer surface of the heating furnace is provided with corrugated plates.

[0022] Furthermore, the heating furnace is also equipped with an operating door on its side.

[0023] Compared with the prior art, the dual-circuit supply and return air gas heater of this utility model has the following advantages:

[0024] (1) The dual-path supply and return air gas heater described in this utility model adopts a dual-path supply and return air design, which enables hot air to form a closed loop circulation in the tunnel drying oven, making full use of waste heat and reducing heat loss. Compared with the traditional single-path supply air system, it has a better energy-saving effect. The dual return air heating zone separated by the combustion cylinder, together with the fan assembly, realizes the uniform distribution of hot air and avoids local overheating or energy waste.

[0025] (2) The dual-path gas heater described in this utility model connects two return air heating zones through return air pipes on both sides. Combined with dual blowers, it ensures that hot air forms a stable convection in the tunnel furnace, eliminates the temperature dead zone of the traditional single-path system, makes the product heat more evenly, and avoids quality problems caused by uneven drying.

[0026] (3) The dual-path supply and return air gas heater described in this utility model is designed with a filter component to further achieve the purpose of flame arrest, increase heat capacity, and achieve the effect of uniform airflow, thereby better optimizing the heating effect. Attached Figure Description

[0027] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0028] Figure 1 This is a schematic diagram of a dual-circuit supply and return air gas heater according to an embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view of a dual-flow supply and return air gas heater according to an embodiment of the present invention;

[0030] Figure 3 This is an exploded view of a dual-circuit supply and return air gas heater according to an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the combustion chamber described in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 11. Heating furnace; 12. Burner; 13. Combustion cylinder; 131. Flame arrestor umbrella; 14. Filter assembly; 141. Filter frame; 142. Filter screen; 143. Integrated plate; 15. Fan assembly; 151. Fan body; 152. Connection port; 16. Air supply duct; 17. Return air duct. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] A dual-circuit supply and return air gas heater, such as Figures 1-4 As shown, it includes a heating furnace 11, a burner 12, a combustion cylinder 13, a filter assembly 14, a fan assembly 15, an air supply duct 16, and a return air duct 17.

[0039] The combustion cylinder 13 and the filter assembly 14 are installed inside the heating furnace 11, the burner 12 is installed on the side of the heating furnace 11 near the combustion cylinder 13, and the fan assembly 15 is installed on the side of the heating furnace 11 near the filter assembly 14.

[0040] The air supply duct 16 is installed on one side of the top of the heating furnace 11 and corresponds to the fan assembly 15; the return air duct 17 is installed on the other side of the top of the heating furnace 11 and connects to the interior of the heating furnace 11.

[0041] The flame generated by the burner 12 burns in the combustion chamber 13; the filter assembly 14 is used to filter the flame.

[0042] The fan assembly 15 is used to draw in the hot air generated by the flame and discharge it from the air supply duct 16.

[0043] The exhausted hot air can enter the heating furnace 11 through the return air duct 17 for reheating and continue to be discharged from the air supply duct 16, forming a circulating air path.

[0044] As an example, the burner 12 is a purchased device, model number Riello burner 12RS160; the fan is also a purchased device, model number Xingyi 4-72.

[0045] Preferably, the combustion cylinder 13 has a barrel-shaped structure and is installed in the middle of the heating furnace 11 by several supports. The combustion cylinder 13 divides the heating furnace 11 into two return air heating zones.

[0046] The combustion cylinder 13 is provided with several through holes in its lower middle part;

[0047] The end of the combustion cylinder 13 is connected to a flame-arresting umbrella cover 131 by several support rods.

[0048] Preferably, the filter assembly 14 includes a filter frame 141 and a filter screen 142; a plurality of filter frames 141 arranged in parallel to each other are mounted on an integrated plate 143, and the integrated plate 143 is provided with through holes corresponding to the filter frames 141.

[0049] The filter frame 141 is installed into the heating furnace 11 via an integrated plate 143, and the filter screen 142 is installed into the filter frame 141. The filter screen 142 is made of stainless steel.

[0050] Preferably, the fan assembly 15 includes a fan body 151 and a connection port 152. Both the fan body 151 and the connection port 152 are installed on the side wall of the heating furnace 11. The connection port 152 is installed above the fan and is connected to the air supply pipe 16.

[0051] Preferably, there are two fan assemblies 15, and a partition is provided between the integrated plate 143 and the inner wall of the heating furnace 11, with the partition positioned between the two fan assemblies 15.

[0052] Preferably, the top of the heating furnace 11 is provided with two air supply pipes 16 that communicate with the connection port 152;

[0053] The top of the heating furnace 11 is also provided with two return air pipes 17, which are respectively connected to two return air heating zones, forming a dual-path mode, which results in higher heating efficiency.

[0054] Preferably, the outer surface of the heating furnace 11 is provided with a corrugated plate, which can protect the heating furnace 11.

[0055] Preferably, the heating furnace 11 is also provided with an operating door on its side for easy maintenance and inspection.

[0056] Working principle: When the burner 12 and the blower body 151 are turned on, the burner 12 generates a flame inside the combustion chamber 13. The hot air from the flame moves under the traction of the blower, and after passing through the combustion chamber 13 and the filter assembly 14, it forms hot air that flows out from the air outlet. The hot air flows through the drying tunnel and then re-enters the heating furnace 11 through the return air inlet.

[0057] The flames burning inside the combustion chamber also flow out through the through holes provided in the combustion chamber 13 to the return air heating zone, heating the cooled air that is returning. After being heated, the air continues to circulate along the above path under the traction of the fan, forming a circulating air path.

[0058] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-circuit supply and return air gas heater, characterized in that: This includes a heating furnace, burner, combustion chamber, filter assembly, fan assembly, air supply duct, and return air duct; The combustion chamber and filter assembly are installed inside the heating furnace, the burner is installed on the side of the heating furnace near the combustion chamber, and the fan assembly is installed on the side of the heating furnace near the filter assembly. The air supply duct is installed on one side of the top of the heating furnace and corresponds to the fan assembly; the return air duct is installed on the other side of the top of the heating furnace and connects to the interior of the heating furnace. The flame generated by the burner burns in the combustion chamber; the filter assembly is used to filter the flame. The fan assembly is used to draw in the hot air generated by the flame and discharge it from the air supply pipe; The exhausted hot air can enter the heating furnace through the return air duct for reheating and continue to be discharged from the supply air duct, forming a circulating air path.

2. A dual-circuit supply and return air gas heater according to claim 1, characterized in that: The combustion cylinder has a barrel-shaped structure and is installed in the middle of the heating furnace by several supports. The combustion cylinder divides the heating furnace into two return air heating zones. The combustion cylinder is provided with several through holes in its lower middle part; The end of the combustion cylinder is connected to a flame-arresting umbrella cover via several support rods.

3. A dual-circuit supply and return air gas heater according to claim 2, characterized in that: The filtration assembly includes a filter frame and a filter screen; Several parallel filter frames are mounted on an integrated plate, and the integrated plate is provided with through holes corresponding to the filter frames; The filter frame is installed into the heating furnace via an integrated plate, and the filter screen is installed inside the filter frame. The filter screen is made of stainless steel.

4. A dual-circuit supply and return air gas heater according to claim 3, characterized in that: The fan assembly includes a fan body and a connection port. Both the fan body and the connection port are installed on the side wall of the heating furnace. The connection port is installed above the fan and is connected to the air supply pipe.

5. A dual-circuit supply and return air gas heater according to claim 4, characterized in that: The number of fan assemblies is two, and a partition is provided between the integrated plate and the inner wall of the heating furnace. The partition is located between the two fan assemblies.

6. A dual-circuit supply and return air gas heater according to claim 4, characterized in that: The top of the heating furnace is equipped with two air supply pipes that communicate with the connection port; The top of the heating furnace is also equipped with two return air pipes, which are respectively connected to two return air heating zones.

7. A dual-circuit supply and return air gas heater according to claim 1, characterized in that: The outer surface of the heating furnace is provided with corrugated plates.

8. A dual-circuit supply and return air gas heater according to claim 1, characterized in that: The heating furnace is also equipped with an operating door on its side.

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