Heating furnace

Abstract

Provided in the present disclosure is a heating furnace, comprising a thermal insulation chamber, a conveying device, and at least one combustion chamber, wherein the combustion chamber is connected to the thermal insulation chamber and is configured to heat gas and deliver the gas into the thermal insulation chamber; and the conveying device is configured to convey a material into and out of the thermal insulation chamber. The heating furnace further comprises an exhaust gas line and an exhaust gas treatment device, wherein the exhaust gas line is connected between the thermal insulation chamber and the exhaust gas treatment device; and the exhaust gas treatment device comprises a purification chamber and an adsorption material disposed in the purification chamber, a gas intake end of the purification chamber being connected to the exhaust gas line, and the adsorption material being located between the gas intake end and a gas discharge end of the purification chamber. In the present disclosure, the exhaust gas treatment device is directly disposed together with the thermal insulation chamber, thereby shortening the exhaust gas transportation distance and reducing heat loss during the exhaust gas transportation process, thus improving the utilization rate of waste heat and reducing the fuel cost of a spray coating production line. Furthermore, material costs associated with long-distance piping, and material and space costs associated with constructing exhaust gas treatment equipment at a separate location can also be saved.

Description

heating furnace

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese utility model application filed on January 15, 2025, with application number 202520096301.2 and entitled "Heating Furnace". Technical Field

[0003] This disclosure relates to the field of curing oven technology, and more specifically, to a heating oven. Background Technology

[0004] Spray coating is commonly used in hardware, plastics, furniture, military, shipbuilding and other fields. It usually uses spray coating equipment to spray paint onto the surface of the workpiece, which serves to beautify and protect the product. Spray coating is highly efficient and provides uniform and reliable coating coverage on the workpiece surface, making it the most widely used coating method today.

[0005] With advancements in spraying technology, large factories typically employ automated spraying equipment for their spraying operations. After the spraying process, the surface coating on the workpiece needs to undergo high-temperature baking and curing. To save on workpiece transportation costs and improve manufacturing efficiency, the spray booths in large factories are often directly connected to high-temperature curing ovens to form a complete production line. A track-transfer system is used to transport workpieces that have completed the spraying process and are awaiting baking into the curing oven, and to transport workpieces that have undergone high-temperature curing out. Simultaneously, to handle the exhaust gases and harmful gases generated in the combustion chamber of the high-temperature curing oven and during paint baking, the gases emitted from the curing oven also need to be purified.

[0006] However, in the existing production line design, the exhaust gas discharged from the curing oven usually needs to be transported through a long pipeline to another dedicated exhaust gas treatment device. During the pipeline transmission process, a large amount of heat will inevitably be lost, and the overall production line will also have a large footprint, resulting in higher fuel costs and equipment and material costs.

[0007] Therefore, how to reduce the fuel and material costs of the spraying production line has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] This disclosure aims to address one of the technical problems in the related art to a certain extent. To this end, this disclosure provides a heating furnace in which the exhaust gas treatment device and the insulation chamber are located in one place, which can reduce heat waste during exhaust gas transportation, reduce fuel costs of the spraying production line, and save on pipeline material costs and equipment floor space costs.

[0009] To achieve the above objectives, this disclosure provides a heating furnace, including a heat preservation chamber, a transmission device, and at least one combustion chamber. The combustion chamber is connected to the heat preservation chamber and is used to heat gas and input the gas into the heat preservation chamber. The transmission device is used to transfer materials into and out of the heat preservation chamber. The heating furnace also includes an exhaust gas pipeline and an exhaust gas treatment device. The exhaust gas treatment device is fixedly connected to the heat preservation chamber. The exhaust gas pipeline is connected between the heat preservation chamber and the exhaust gas treatment device. The exhaust gas treatment device includes a purification chamber and an adsorbent material disposed in the purification chamber. The inlet end of the purification chamber is connected to the exhaust gas pipeline, and the adsorbent material is located between the inlet end and the exhaust end of the purification chamber.

[0010] Optionally, the waste gas treatment device further includes multiple adsorption and fixing nets, which are spaced apart, and the adsorption material is fixed between adjacent adsorption and fixing nets.

[0011] Optionally, the adsorption fixing net is arranged vertically.

[0012] Optionally, the adsorption and fixation net is parallel to the gas flow direction.

[0013] Optionally, the adsorbent material comprises a plurality of activated carbon particles.

[0014] Optionally, the exhaust gas treatment device further includes multiple extraction cylinders and multiple spray devices. The extraction cylinders are installed inside the purification chamber. The extraction cylinders can draw in the gas received by the air inlet of the purification chamber through the extraction port at the bottom and discharge the gas through the exhaust port at the top. The spray devices are installed in the extraction cylinders and can spray coolant into the inside of the extraction cylinders.

[0015] Optionally, the diameter of the bottom end of the suction cylinder gradually decreases from top to bottom.

[0016] Optionally, the exhaust gas treatment device further includes a spray circulation pipeline and a water tank, the water tank being disposed below the exhaust cylinder, and the spray circulation pipeline being able to extract coolant from the water tank and transport it to the spray device.

[0017] Optionally, the plurality of suction cylinders includes at least one first suction cylinder and at least one second suction cylinder, wherein the suction port of the first suction cylinder is connected to the air inlet of the purification chamber, and the exhaust port of the first suction cylinder is connected to the suction port of the second suction cylinder.

[0018] Optionally, the purification chamber is provided with a partition, which isolates a gas buffer chamber at the exhaust port of the first exhaust cylinder. The waste gas treatment device also includes a first exhaust pipe and a second exhaust pipe. The first exhaust pipe is connected between the air inlet of the purification chamber and the air outlet of the first exhaust cylinder, and the second exhaust pipe is connected between the gas buffer chamber and the air outlet of the second exhaust cylinder.

[0019] Optionally, the plurality of vacuum cylinders include a first vacuum cylinder arranged in pairs and a second vacuum cylinder arranged in pairs.

[0020] Optionally, the waste gas treatment device further includes a water blocker, which is disposed at the exhaust port of the second suction cylinder and is capable of absorbing moisture in the gas discharged from the second suction cylinder.

[0021] Optionally, the water blocker includes multiple horizontally stacked drying and fixing nets, with water-blocking material disposed between the drying and fixing nets.

[0022] Optionally, the water-blocking material is gypsum.

[0023] Optionally, the waste gas treatment device further includes a plurality of filter inclined plates, which are disposed between the exhaust cylinder and the adsorption material.

[0024] Optionally, the water blocker is provided with a guide bend on the side facing the filter inclined plate.

[0025] Optionally, the waste gas treatment device further includes a gas collecting fan, which is disposed between the adsorption material and the exhaust end of the purification chamber, and is used to extract the gas in the purification chamber to the exhaust end.

[0026] Optionally, the purification chamber has a maintenance door on the side corresponding to the air collecting fan.

[0027] In the heating furnace provided in this disclosure, the exhaust gas treatment device is directly located at the same place as the insulation chamber. The exhaust gas in the insulation chamber flows directly into the exhaust gas treatment device next to the insulation chamber through the exhaust gas pipeline, and is purified by the adsorption material (such as activated carbon) in the exhaust gas treatment device. Compared with the prior art scheme of transporting exhaust gas to exhaust gas treatment equipment that is far away, this disclosure shortens the exhaust gas transportation distance, thereby reducing heat waste during the exhaust gas transportation process, improving the waste heat utilization rate, and thus reducing the fuel cost of the spraying production line. At the same time, it can also save the material cost of long-distance pipelines and the material and land costs of building exhaust gas treatment equipment elsewhere. Attached Figure Description

[0028] The present disclosure will be further explained below with reference to the accompanying drawings:

[0029] Figure 1 is a schematic diagram of the structure of the heating furnace provided in an embodiment of this disclosure;

[0030] Figure 2 is a schematic diagram of the structure of the waste gas treatment device in the heating furnace provided in an embodiment of this disclosure;

[0031] Figure 3 is a schematic diagram of the structure of the waste gas treatment device in the heating furnace provided in the embodiment of this disclosure.

[0032] Explanation of reference numerals in the attached drawings: 10, Insulation chamber; 20, Combustion chamber; 30, Exhaust gas pipeline; 100, Exhaust gas treatment device; 110, Purification chamber; 120, Adsorption fixing net; 121, Adsorption material; 130, Extraction cylinder; 131, First extraction cylinder; 132, Second extraction cylinder; 133, First extraction pipe; 134, Second extraction pipe; 140, Water tank; 150, Water blocker; 151, Guide bend plate; 160, Filter inclined plate; 170, Gas collecting fan; 180, Maintenance door. Detailed Implementation

[0033] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this disclosure and should not be construed as limiting it.

[0034] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this disclosure. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0035] This disclosure provides a heating furnace, as shown in Figure 1. The heating furnace includes a heat preservation chamber 10, a conveying device, and at least one combustion chamber 20. The combustion chamber 20 is connected to the heat preservation chamber 10 and is used to heat gas and input the gas into the heat preservation chamber 10. The conveying device is used to transfer materials into and out of the heat preservation chamber 10. The heating furnace may also include an exhaust gas pipeline 30 and an exhaust gas treatment device 100. The exhaust gas treatment device 100 is fixedly connected to the heat preservation chamber 10. The exhaust gas pipeline 30 is connected between the heat preservation chamber 10 and the exhaust gas treatment device 100. The exhaust gas treatment device 100 includes a purification chamber 110 and an adsorbent material 121 disposed in the purification chamber 110. The air inlet a of the purification chamber 110 is connected to the exhaust gas pipeline 30, and the adsorbent material 121 is located between the air inlet a and the exhaust b of the purification chamber 110.

[0036] Understandably, the combustion chamber 20 is used to input high-temperature gas into the insulation chamber 10 to maintain the temperature inside the insulation chamber 10. The insulation chamber 10 is used to heat the workpieces transmitted by the transmission device using the internal high temperature. The exhaust gas discharged from the insulation chamber 10 is transported to the exhaust gas treatment device 100 for purification by the exhaust gas pipeline 30.

[0037] In this embodiment, the "gas" can be air. The combustion chamber 20 introduces heated air into the insulation chamber 10.

[0038] In the heating furnace provided in this disclosure, the exhaust gas treatment device 100 is directly located at the same place as the insulation chamber 10. The exhaust gas in the insulation chamber 10 flows directly into the exhaust gas treatment device 100 next to the insulation chamber 10 through the exhaust gas pipeline 30, and is purified online using the adsorption material 121 in the exhaust gas treatment device 100. Compared with the related art schemes that transport exhaust gas to exhaust gas treatment equipment at a distance, the heating furnace provided in this disclosure shortens the exhaust gas transmission distance, thereby reducing heat waste during exhaust gas transportation, improving the subsequent utilization rate of waste heat, and thus reducing the fuel cost of the spraying production line. At the same time, the heating furnace provided in this disclosure can also save the material cost of long-distance pipelines and the material and land costs of building exhaust gas treatment equipment elsewhere.

[0039] In this embodiment, the specific type of workpiece is not specifically limited. For example, the workpiece can be kitchenware that has been painted and is to be heated and cured. During the process of heating and curing the painted kitchenware in the insulation chamber 10, waste gas is generated. This waste gas reaches the adsorption material 121 through the waste gas pipeline 30, and after being adsorbed and purified by the adsorption material, it enters the purification chamber 110.

[0040] In this embodiment, the specific type of adsorbent 121 is not particularly limited, as long as it has adsorption function and is breathable. For example, activated carbon particles can be used as adsorbent 121.

[0041] As an optional embodiment of this disclosure, as shown in FIG1, the exhaust gas treatment device 100 is disposed above the insulation chamber 10.

[0042] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the waste gas treatment device 100 further includes a plurality of adsorption fixing nets 120, which are spaced apart, and the adsorption material 121 is fixed between adjacent adsorption fixing nets 120.

[0043] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, multiple adsorption fixing nets 120 are vertically arranged, and adsorption material 121 is filled between two adjacent adsorption fixing nets 120.

[0044] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the adsorption fixing net 120 is parallel to the gas flow direction (i.e., from the side of the inlet end a to the side of the exhaust end b).

[0045] As an alternative embodiment of this disclosure, as described above, the adsorbent material 121 comprises a plurality of activated carbon particles.

[0046] Optionally, the activated carbon particles are porous materials, which allows for the formation of numerous voids between the activated carbon particles, ensuring full contact between the gas and the surface of the activated carbon particles.

[0047] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the waste gas treatment device 100 further includes multiple extraction cylinders 130 and multiple spray devices (not shown in the figures). The extraction cylinders 130 are disposed within the purification chamber 110. The extraction cylinders 130 can draw in the gas received from the air inlet a of the purification chamber 110 through the extraction port at their bottom, and discharge the gas through the exhaust port at the top of the extraction cylinders 130. The spray devices are disposed within the extraction cylinders 130 and can spray coolant into the interior of the extraction cylinders 130.

[0048] As described above, the exhaust gas treatment device 100 also includes an exhaust cylinder 130 and a spray device disposed in the exhaust cylinder 130. Exhaust gas enters through the exhaust port at the bottom of the exhaust cylinder 130 and flows upward. At the same time, the spray device sprays liquid (e.g., water) into the exhaust cylinder 130, so that the liquid fully contacts the exhaust gas in the exhaust cylinder 130 and absorbs harmful substances and dust in the exhaust gas. The purified gas is discharged from the top of the exhaust cylinder 130, thereby further improving the exhaust gas purification rate.

[0049] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the diameter of the bottom end of the vacuum cylinder 130 gradually decreases from top to bottom, forming a funnel-shaped structure to reduce the splash area when liquid drips.

[0050] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the exhaust gas treatment device 100 further includes a spray circulation pipeline (not shown in the figures) and a water tank 140. The water tank 140 is disposed below the exhaust cylinder 130. The spray circulation pipeline can extract the coolant in the water tank 140 and transport it to the spray device to form a coolant circulation.

[0051] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the plurality of suction cylinders 130 include at least one first suction cylinder 131 and at least one second suction cylinder 132. The suction port of the first suction cylinder 131 is connected to the air inlet a of the purification chamber 110, and the exhaust port of the first suction cylinder 131 is connected to the suction port of the second suction cylinder 132.

[0052] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, a partition is provided in the purification chamber 110. The partition isolates the exhaust port of the first exhaust cylinder 131 to form a gas buffer chamber. The waste gas treatment device 100 also includes a first exhaust pipe 133 and a second exhaust pipe 134. The first exhaust pipe 133 is connected between the air inlet a of the purification chamber 110 and the exhaust port of the first exhaust cylinder 131, and the second exhaust pipe 134 is connected between the gas buffer chamber and the exhaust port of the second exhaust cylinder 132.

[0053] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the plurality of vacuum cylinders 130 include a pair of first vacuum cylinders 131 and a pair of second vacuum cylinders 132.

[0054] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the waste gas treatment device 100 further includes a water blocker 150. The water blocker 150 is disposed at the exhaust port of the second suction cylinder 132 and can block the moisture in the gas discharged from the second suction cylinder 132, so as to reduce the moisture transported to the downstream filter inclined plate 160, adsorption material 121 and other structures, keep the downstream purification structure dry, and thus ensure the purification effect.

[0055] As an optional embodiment of this disclosure, the water blocker 150 includes a plurality of horizontally stacked drying and fixing nets, with water-blocking material disposed between the drying and fixing nets.

[0056] Alternatively, the water-blocking material can be gypsum.

[0057] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the exhaust gas treatment device 100 further includes a plurality of filter inclined plates 160, which are disposed between the exhaust cylinder 130 and the adsorption material 121, thereby utilizing the slit structure of the filter inclined plates 160 to further filter out dust particles in the exhaust gas.

[0058] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, a guide plate 151 is provided on the side of the water blocker 150 facing the filter inclined plate 160, which is used to guide the gas discharged above the water blocker 150 obliquely downward to the position of the filter inclined plate 160.

[0059] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the waste gas treatment device 100 further includes a gas collecting fan 170, which is disposed between the adsorption material 121 and the exhaust end b of the purification chamber 110, and is used to extract the gas in the purification chamber 110 to the exhaust end b.

[0060] As an optional embodiment of this disclosure, as shown in Figures 2 and 3, the purification chamber 110 has a maintenance door 180 on the side corresponding to the air collecting fan 170, so that operators can open the maintenance door 180 and maintain the air collecting fan 170 and other equipment.

[0061] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Those skilled in the art should understand that this disclosure includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this disclosure will be included within the scope of the claims.

Claims

1. A heating furnace, comprising a heat preservation chamber (10), a conveying device, and at least one combustion chamber (20), the combustion chamber (20) being connected to the heat preservation chamber (10), and the combustion chamber being used to heat gas and input the gas into the heat preservation chamber (10), the conveying device being used to input and output material into the heat preservation chamber (10), characterized in that, The heating furnace also includes a waste gas pipeline (30) and a waste gas treatment device (100). The waste gas treatment device (100) is fixedly connected to the insulation chamber (10). The waste gas pipeline (30) is connected between the insulation chamber (10) and the waste gas treatment device (100). The waste gas treatment device (100) includes a purification chamber (110) and an adsorbent material (121) disposed in the purification chamber (110). The air inlet end of the purification chamber (110) is connected to the waste gas pipeline (30). The adsorbent material (121) is located between the air inlet end and the exhaust end of the purification chamber (110).

2. The heating furnace according to claim 1, characterized in that, The waste gas treatment device (100) also includes a plurality of adsorption fixing nets (120), the plurality of adsorption fixing nets (120) are arranged at intervals, and the adsorption material (121) is fixed between adjacent adsorption fixing nets (120).

3. The heating furnace according to claim 2, characterized in that, The adsorbent material (121) comprises multiple activated carbon particles.

4. The heating furnace according to claim 1, characterized in that, The exhaust gas treatment device (100) also includes multiple extraction cylinders (130) and multiple spray devices. The extraction cylinders (130) are disposed inside the purification chamber (110). The extraction cylinders (130) can draw gas received from the air inlet of the purification chamber (110) through the extraction port at the bottom of the extraction cylinder (130) and discharge the gas through the exhaust port at the top of the extraction cylinder (130). The spray devices are disposed in the extraction cylinders (130) and can spray coolant into the extraction cylinders (130).

5. The heating furnace according to claim 4, characterized in that, The exhaust gas treatment device (100) also includes a spray circulation pipeline and a water tank (140). The water tank (140) is located below the exhaust cylinder (130). The spray circulation pipeline can draw coolant from the water tank (140) and transport it to the spray device.

6. The heating furnace according to claim 4, characterized in that, The plurality of suction cylinders (130) include at least one first suction cylinder (131) and at least one second suction cylinder (132), wherein the suction port of the first suction cylinder (131) is connected to the air inlet of the purification chamber (110), and the exhaust port of the first suction cylinder (131) is connected to the suction port of the second suction cylinder (132).

7. The heating furnace according to claim 6, characterized in that, The plurality of said vacuum tubes (130) include a first vacuum tube (131) and a second vacuum tube (132) arranged in pairs.

8. The heating furnace according to claim 6, characterized in that, The exhaust gas treatment device (100) further includes a water blocker (150), which is located at the exhaust port of the second exhaust cylinder (132) and can block moisture in the gas discharged from the second exhaust cylinder (132).

9. The heating furnace according to claim 4, characterized in that, The waste gas treatment device (100) also includes a plurality of filter inclined plates (160), which are disposed between the air extraction cylinder (130) and the adsorption material (121).

10. The heating furnace according to any one of claims 1 to 9, characterized in that, The waste gas treatment device (100) further includes a gas collecting fan (170), which is disposed between the adsorbent material (121) and the exhaust end of the purification chamber (110), and is used to extract the gas in the purification chamber (110) to the exhaust end.

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